drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  *
  14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
  15  *
  16  * Much of the design and some of the code came from serial.c
  17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  20  * Converted to pci probing and cleaned up by Jiri Slaby.
  21  *
  22  * This version supports shared IRQ's (only for PCI boards).
  23  *
  24  * Prevent users from opening non-existing Z ports.
  25  *
  26  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  27  * Fixed the PCI detection function to work properly on Alpha systems.
  28  * Implemented support for TIOCSERGETLSR ioctl.
  29  * Implemented full support for non-standard baud rates.
  30  *
  31  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  32  * Request PLX I/O region, although driver doesn't use it, to avoid
  33  * problems with other drivers accessing it.
  34  * Removed count for on-board buffer characters in cy_chars_in_buffer
  35  * (Cyclades-Z only).
  36  *
  37  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  38  * Driver now reports physical instead of virtual memory addresses.
  39  * Masks were added to some Cyclades-Z read accesses.
  40  * Implemented workaround for PLX9050 bug that would cause a system lockup
  41  * in certain systems, depending on the MMIO addresses allocated to the
  42  * board.
  43  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  44  * performance (Cyclom-Y only).
  45  * Code is now compliant with the new module interface (module_[init|exit]).
  46  * Make use of the PCI helper functions to access PCI resources.
  47  * Did some code "housekeeping".
  48  *
  49  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  50  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  51  *
  52  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  53  * Fixed SMP locking in Cyclom-Y interrupt handler.
  54  *
  55  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  56  * Added a new cyclades_card field called nports to allow the driver to
  57  * know the exact number of ports found by the Z firmware after its load;
  58  * RX buffer contention prevention logic on interrupt op mode revisited
  59  * (Cyclades-Z only);
  60  * Revisited printk's for Z debug;
  61  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  62  *
  63  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  64  * Fixed bug in cyz_poll that would make all ports but port 0
  65  * unable to transmit/receive data (Cyclades-Z only);
  66  * Implemented logic to prevent the RX buffer from being stuck with data
  67  * due to a driver / firmware race condition in interrupt op mode
  68  * (Cyclades-Z only);
  69  * Fixed bug in block_til_ready logic that would lead to a system crash;
  70  * Revisited cy_close spinlock usage;
  71  *
  72  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  73  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  74  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  75  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  76  * Removed CTS handling from the driver -- this is now completely handled
  77  * by the firmware (Cyclades-Z only);
  78  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  79  * Fixed handling of ASYNC_SPD_* TTY flags;
  80  * Module unload now unmaps all memory area allocated by ioremap;
  81  *
  82  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  83  * Removed CY_PROC conditional compilation;
  84  * Implemented SMP-awareness for the driver;
  85  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  86  * functions;
  87  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  88  * (irq=NN) as parameters (only for ISA boards);
  89  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  90  * ports from being configured at speeds above 115.2Kbps;
  91  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  92  * switching from working properly;
  93  * The driver now only prints IRQ info for the Cyclades-Z if it's
  94  * configured to work in interrupt mode;
  95  *
  96  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  97  * Added support for interrupt mode operation for the Z cards;
  98  * Removed the driver inactivity control for the Z;
  99  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 100  * the Z firmware is not loaded yet;
 101  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 102  * same functionality;
 103  * Implemented workaround for IRQ setting loss on the PCI configuration
 104  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 105  *
 106  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 107  * /proc entry location changed to /proc/tty/driver/cyclades;
 108  * Added support to shared IRQ's (only for PCI boards);
 109  * Added support for Cobalt Qube2 systems;
 110  * IRQ [de]allocation scheme revisited;
 111  * BREAK implementation changed in order to make use of the 'break_ctl'
 112  * TTY facility;
 113  * Fixed typo in TTY structure field 'driver_name';
 114  * Included a PCI bridge reset and EEPROM reload in the board
 115  * initialization code (for both Y and Z series).
 116  *
 117  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 118  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 119  * closed properly after a SIGINT;
 120  * Module usage counter scheme revisited;
 121  * Added support to the upcoming Y PCI boards (i.e., support to additional
 122  * PCI Device ID's).
 123  *
 124  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 125  * Removed all unnecessary page-alignement operations in ioremap calls
 126  * (ioremap is currently safe for these operations).
 127  *
 128  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 129  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 130  * order to make PLX9050-based boards work with certain motherboards.
 131  *
 132  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 133  * cy_close function now resets (correctly) the tty->closing flag;
 134  * JIFFIES_DIFF macro fixed.
 135  *
 136  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 137  * Fixed bug in cy_close function, which was not informing HW of
 138  * which port should have the reception disabled before doing so;
 139  * fixed Cyclom-8YoP hardware detection bug.
 140  *
 141  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 142  * Fixed bug in cy_close function, which causes malfunction
 143  * of one of the first 4 ports when a higher port is closed
 144  * (Cyclom-Y only).
 145  *
 146  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 147  * Fixed Cyclom-4Yo hardware detection bug.
 148  *
 149  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 150  * /proc/cyclades implementation with great collaboration of
 151  * Marc Lewis <marc@blarg.net>;
 152  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 153  * during PPP operation.
 154  *
 155  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 156  * General code review in order to comply with 2.1 kernel standards;
 157  * data loss prevention for slow devices revisited (cy_wait_until_sent
 158  * was created);
 159  * removed conditional compilation for new/old PCI structure support
 160  * (now the driver only supports the new PCI structure).
 161  *
 162  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 163  * added conditional compilation for new/old PCI structure support;
 164  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 165  *
 166  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 167  * cleaned up the data loss fix;
 168  * fixed XON/XOFF handling once more (Cyclades-Z);
 169  * general review of the driver routines;
 170  * introduction of a mechanism to prevent data loss with slow
 171  * printers, by forcing a delay before closing the port.
 172  *
 173  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 174  * fixed detection/handling of new CD1400 in Ye boards;
 175  * fixed XON/XOFF handling (Cyclades-Z);
 176  * fixed data loss caused by a premature port close;
 177  * introduction of a flag that holds the CD1400 version ID per port
 178  * (used by the CYGETCD1400VER new ioctl).
 179  *
 180  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 181  * Code review for the module cleanup routine;
 182  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 183  * includes anonymous changes regarding signal_pending.
 184  *
 185  * Revision 2.1  1997/11/01 17:42:41 ivan
 186  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 187  * BREAK fix for the Cyclades-Z boards;
 188  * driver inactivity control by FW implemented;
 189  * introduction of flag that allows driver to take advantage of
 190  * a special CD1400 feature related to HW flow control;
 191  * added support for the CD1400  rev. J (Cyclom-Y boards);
 192  * introduction of ioctls to:
 193  *  - control the rtsdtr_inv flag (Cyclom-Y);
 194  *  - control the rflow flag (Cyclom-Y);
 195  *  - adjust the polling interval (Cyclades-Z);
 196  *
 197  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 198  * Fixes related to kernel version conditional
 199  * compilation.
 200  *
 201  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 202  * Compatibility issues between kernels 2.0.x and
 203  * 2.1.x (mainly related to clear_bit function).
 204  *
 205  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 206  * Changes to define the memory window according to the
 207  * board type.
 208  *
 209  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 210  * Changes to support new cycladesZ boards.
 211  *
 212  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 213  * Merge of Bentson's and Daniel's version 1.36.4.28.
 214  * Corrects bug in cy_detect_pci: check if there are more
 215  * ports than the number of static structs allocated.
 216  * Warning message during initialization if this driver is
 217  * used with the new generation of cycladesZ boards.  Those
 218  * will be supported only in next release of the driver.
 219  * Corrects bug in cy_detect_pci and cy_detect_isa that
 220  * returned wrong number of VALID boards, when a cyclomY
 221  * was found with no serial modules connected.
 222  * Changes to use current (2.1.x) kernel subroutine names
 223  * and created macros for compilation with 2.0.x kernel,
 224  * instead of the other way around.
 225  *
 226  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 227  * Change queue_task_irq_off to queue_task_irq.
 228  * The inline function queue_task_irq_off (tqueue.h)
 229  * was removed from latest releases of 2.1.x kernel.
 230  * Use of macro __init to mark the initialization
 231  * routines, so memory can be reused.
 232  * Also incorporate implementation of critical region
 233  * in function cleanup_module() created by anonymous
 234  * linuxer.
 235  *
 236  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 237  * Change to support new firmware that solves DCD problem:
 238  * application could fail to receive SIGHUP signal when DCD
 239  * varying too fast.
 240  *
 241  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 242  * Changed for support linux versions 2.1.X.
 243  * Backward compatible with linux versions 2.0.X.
 244  * Corrected illegal use of filler field in
 245  * CH_CTRL struct.
 246  * Deleted some debug messages.
 247  *
 248  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 249  * Included check for NULL tty pointer in cyz_poll.
 250  *
 251  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 252  * Bill Foster at Blarg! Online services noticed that
 253  * some of the switch elements of -Z modem control
 254  * lacked a closing "break;"
 255  *
 256  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 257  * Changed low water threshold for buffer xmit_buf
 258  *
 259  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 260  * Marcio provided fix to modem status fetch for -Z
 261  *
 262  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 263  * improve mapping of -Z control page (thanks to Steve
 264  * Price <stevep@fa.tdktca.com> for help on this)
 265  *
 266  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 267  * shift from CPU-bound to memcopy in cyz_polling operation
 268  *
 269  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 270  * Added support to set and report higher speeds.
 271  *
 272  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 273  * Some fixes in the HW flow control for the BETA release.
 274  * Don't try to register the IRQ.
 275  *
 276  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 277  * make sure "cyc" appears in all kernel messages; all soft interrupts
 278  * handled by same routine; recognize out-of-band reception; comment
 279  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 280  * fix race condition in -Z buffer management; only -Y needs to explicitly
 281  * flush chars; tidy up some startup messages;
 282  *
 283  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 284  * shift MOD_INC_USE_COUNT location to match
 285  * serial.c; purge some diagnostic messages;
 286  *
 287  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 288  * enable modem status messages and fetch & process them; note
 289  * time of last activity type for each port; set_line_char now
 290  * supports more than line 0 and treats 0 baud correctly;
 291  * get_modem_info senses rs_status;
 292  *
 293  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 294  * barely works--now's time to turn on
 295  * more features 'til it breaks
 296  *
 297  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 298  * check more -Z board status; shorten boot message
 299  *
 300  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 301  * fix reference to ch_ctrl in startup; verify return
 302  * values from cyz_issue_cmd and cyz_update_channel;
 303  * more stuff to get modem control correct;
 304  *
 305  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 306  * more -Z stuff folded in; re-order changes to put -Z stuff
 307  * after -Y stuff (to make changes clearer)
 308  *
 309  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 310  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 311  * Add code to send break.  Clear firmware ID word at startup (so
 312  * that other code won't talk to inactive board).
 313  *
 314  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 315  * add code for -Z in set_line_char
 316  *
 317  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 318  * fold more -Z stuff (or in some cases, error messages)
 319  * into driver; add text to "don't know what to do" messages.
 320  *
 321  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 322  * moved compile-time flags near top of file; cosmetic changes
 323  * to narrow text (to allow 2-up printing); changed many declarations
 324  * to "static" to limit external symbols; shuffled code order to
 325  * coalesce -Y and -Z specific code, also to put internal functions
 326  * in order of tty_driver structure; added code to recognize -Z
 327  * ports (and for moment, do nothing or report error); add cy_startup
 328  * to parse boot command line for extra base addresses for ISA probes;
 329  *
 330  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 331  * reorder some code, fix types of some vars (int vs. long),
 332  * add cy_setup to support user declared ISA addresses
 333  *
 334  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 335  * dump ioctl based firmware load (it's now a user level
 336  * program); ensure uninitialzed ports cannot be used
 337  *
 338  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 339  * rename vars and restructure some code
 340  *
 341  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 342  * get right status back after boot load
 343  *
 344  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 345  * successfully loads firmware
 346  *
 347  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 348  * add more of the code for the boot/load ioctls
 349  *
 350  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 351  * start to add Z functionality--starting with ioctl
 352  * for loading firmware
 353  *
 354  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 355  * added code to recognize Z/PCI card at initialization; report
 356  * presence, but card is not initialized (because firmware needs
 357  * to be loaded)
 358  *
 359  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 360  * starting minor number at zero; added missing verify_area
 361  * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
 362  *
 363  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 364  * remove unneeded boot message & fix CLOCAL hardware flow
 365  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 366  * remove unused diagnostic statements; minor 0 is first;
 367  *
 368  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 369  * The kernel function vremap (available only in later 1.3.xx kernels)
 370  * allows the access to memory addresses above the RAM. This revision
 371  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 372  * above 1Mb (device id 0x101).
 373  *
 374  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 375  * Some global changes to interrupt handling spilled into
 376  * this driver--mostly unused arguments in system function
 377  * calls.  Also added change by Marcio Saito which should
 378  * reduce lost interrupts at startup by fast processors.
 379  *
 380  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 381  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 382  * in 1.3.41 kernel to remove a possible race condition, extend
 383  * some error messages, and let the driver run as a loadable module
 384  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 385  * possible race condition.
 386  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 387  *
 388  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 389  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 390  * required due to reordering of driver initialization.
 391  * Drivers are now initialized *after* memory management.
 392  *
 393  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 394  * remove printk from ISR; fix typo
 395  *
 396  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 397  * Minor fixes in the PCI board support. PCI function calls in
 398  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 399  * <duncan@okay.com>. "bad serial count" message removed.
 400  *
 401  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 402  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 403  * board initialization. Changes in the boot messages. The driver
 404  * supports up to 4 boards and 64 ports by default.
 405  *
 406  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 407  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 408  *
 409  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 410  * add missing break in modem control block in ioctl switch statement
 411  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 412  *
 413  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 414  * make sure CTS flow control is set as soon as possible (thanks
 415  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 416  *
 417  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 418  * initialize defaults for receive threshold and stale data timeout;
 419  * cosmetic changes;
 420  *
 421  * Revision 1.36  1995/03/10  23:33:53  bentson
 422  * added support of chips 4-7 in 32 port Cyclom-Ye;
 423  * fix cy_interrupt pointer dereference problem
 424  * (Joe Portman <baron@aa.net>);
 425  * give better error response if open is attempted on non-existent port
 426  * (Zachariah Vaum <jchryslr@netcom.com>);
 427  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 428  * conditional compilation for -16Y on systems with fast, noisy bus;
 429  * comment out diagnostic print function;
 430  * cleaned up table of base addresses;
 431  * set receiver time-out period register to correct value,
 432  * set receive threshold to better default values,
 433  * set chip timer to more accurate 200 Hz ticking,
 434  * add code to monitor and modify receive parameters
 435  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 436  * <njs@scifi.emi.net>);
 437  *
 438  * Revision 1.35  1994/12/16  13:54:18  steffen
 439  * additional patch by Marcio Saito for board detection
 440  * Accidently left out in 1.34
 441  *
 442  * Revision 1.34  1994/12/10  12:37:12  steffen
 443  * This is the corrected version as suggested by Marcio Saito
 444  *
 445  * Revision 1.33  1994/12/01  22:41:18  bentson
 446  * add hooks to support more high speeds directly; add tytso
 447  * patch regarding CLOCAL wakeups
 448  *
 449  * Revision 1.32  1994/11/23  19:50:04  bentson
 450  * allow direct kernel control of higher signalling rates;
 451  * look for cards at additional locations
 452  *
 453  * Revision 1.31  1994/11/16  04:33:28  bentson
 454  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 455  * a problem in chars_in_buffer has been resolved by some
 456  * small changes;  this should yield smoother output
 457  *
 458  * Revision 1.30  1994/11/16  04:28:05  bentson
 459  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 460  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 461  * cy_hangup that appears to clear up much (all?) of the
 462  * DTR glitches; also he's added/cleaned-up diagnostic messages
 463  *
 464  * Revision 1.29  1994/11/16  04:16:07  bentson
 465  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 466  * operate higher speeds in same way as other serial ports;
 467  * add more serial ports (for up to two 16-port muxes).
 468  *
 469  * Revision 1.28  1994/11/04  00:13:16  root
 470  * turn off diagnostic messages
 471  *
 472  * Revision 1.27  1994/11/03  23:46:37  root
 473  * bunch of changes to bring driver into greater conformance
 474  * with the serial.c driver (looking for missed fixes)
 475  *
 476  * Revision 1.26  1994/11/03  22:40:36  root
 477  * automatic interrupt probing fixed.
 478  *
 479  * Revision 1.25  1994/11/03  20:17:02  root
 480  * start to implement auto-irq
 481  *
 482  * Revision 1.24  1994/11/03  18:01:55  root
 483  * still working on modem signals--trying not to drop DTR
 484  * during the getty/login processes
 485  *
 486  * Revision 1.23  1994/11/03  17:51:36  root
 487  * extend baud rate support; set receive threshold as function
 488  * of baud rate; fix some problems with RTS/CTS;
 489  *
 490  * Revision 1.22  1994/11/02  18:05:35  root
 491  * changed arguments to udelay to type long to get
 492  * delays to be of correct duration
 493  *
 494  * Revision 1.21  1994/11/02  17:37:30  root
 495  * employ udelay (after calibrating loops_per_second earlier
 496  * in init/main.c) instead of using home-grown delay routines
 497  *
 498  * Revision 1.20  1994/11/02  03:11:38  root
 499  * cy_chars_in_buffer forces a return value of 0 to let
 500  * login work (don't know why it does); some functions
 501  * that were returning EFAULT, now executes the code;
 502  * more work on deciding when to disable xmit interrupts;
 503  *
 504  * Revision 1.19  1994/11/01  20:10:14  root
 505  * define routine to start transmission interrupts (by enabling
 506  * transmit interrupts); directly enable/disable modem interrupts;
 507  *
 508  * Revision 1.18  1994/11/01  18:40:45  bentson
 509  * Don't always enable transmit interrupts in startup; interrupt on
 510  * TxMpty instead of TxRdy to help characters get out before shutdown;
 511  * restructure xmit interrupt to check for chars first and quit if
 512  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 513  * (to my view);
 514  *
 515  * Revision 1.17  1994/10/30  04:39:45  bentson
 516  * rename serial_driver and callout_driver to cy_serial_driver and
 517  * cy_callout_driver to avoid linkage interference; initialize
 518  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 519  * from cyclades_port structure; add paranoia check to cy_close;
 520  *
 521  * Revision 1.16  1994/10/30  01:14:33  bentson
 522  * change major numbers; add some _early_ return statements;
 523  *
 524  * Revision 1.15  1994/10/29  06:43:15  bentson
 525  * final tidying up for clean compile;  enable some error reporting
 526  *
 527  * Revision 1.14  1994/10/28  20:30:22  Bentson
 528  * lots of changes to drag the driver towards the new tty_io
 529  * structures and operation.  not expected to work, but may
 530  * compile cleanly.
 531  *
 532  * Revision 1.13  1994/07/21  23:08:57  Bentson
 533  * add some diagnostic cruft; support 24 lines (for testing
 534  * both -8Y and -16Y cards; be more thorough in servicing all
 535  * chips during interrupt; add "volatile" a few places to
 536  * circumvent compiler optimizations; fix base & offset
 537  * computations in block_til_ready (was causing chip 0 to
 538  * stop operation)
 539  *
 540  * Revision 1.12  1994/07/19  16:42:11  Bentson
 541  * add some hackery for kernel version 1.1.8; expand
 542  * error messages; refine timing for delay loops and
 543  * declare loop params volatile
 544  *
 545  * Revision 1.11  1994/06/11  21:53:10  bentson
 546  * get use of save_car right in transmit interrupt service
 547  *
 548  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 549  * add some diagnostic printing; try to fix save_car stuff
 550  *
 551  * Revision 1.10  1994/06/11  20:36:08  bentson
 552  * clean up compiler warnings
 553  *
 554  * Revision 1.9  1994/06/11  19:42:46  bentson
 555  * added a bunch of code to support modem signalling
 556  *
 557  * Revision 1.8  1994/06/11  17:57:07  bentson
 558  * recognize break & parity error
 559  *
 560  * Revision 1.7  1994/06/05  05:51:34  bentson
 561  * Reorder baud table to be monotonic; add cli to CP; discard
 562  * incoming characters and status if the line isn't open; start to
 563  * fold code into cy_throttle; start to port get_serial_info,
 564  * set_serial_info, get_modem_info, set_modem_info, and send_break
 565  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 566  * get flow control characters from tty struct; invalidate ports w/o
 567  * hardware;
 568  *
 569  * Revision 1.6  1994/05/31  18:42:21  bentson
 570  * add a loop-breaker in the interrupt service routine;
 571  * note when port is initialized so that it can be shut
 572  * down under the right conditions; receive works without
 573  * any obvious errors
 574  *
 575  * Revision 1.5  1994/05/30  00:55:02  bentson
 576  * transmit works without obvious errors
 577  *
 578  * Revision 1.4  1994/05/27  18:46:27  bentson
 579  * incorporated more code from lib_y.c; can now print short
 580  * strings under interrupt control to port zero; seems to
 581  * select ports/channels/lines correctly
 582  *
 583  * Revision 1.3  1994/05/25  22:12:44  bentson
 584  * shifting from multi-port on a card to proper multiplexor
 585  * data structures;  added skeletons of most routines
 586  *
 587  * Revision 1.2  1994/05/19  13:21:43  bentson
 588  * start to crib from other sources
 589  *
 590  */
 591
 592 #define CY_VERSION      "2.5"
 593
 594 /* If you need to install more boards than NR_CARDS, change the constant
 595    in the definition below. No other change is necessary to support up to
 596    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 597
 598 #define NR_CARDS        4
 599
 600 /*
 601    If the total number of ports is larger than NR_PORTS, change this
 602    constant in the definition below. No other change is necessary to
 603    support more boards/ports. */
 604
 605 #define NR_PORTS        256
 606
 607 #define ZE_V1_NPORTS    64
 608 #define ZO_V1   0
 609 #define ZO_V2   1
 610 #define ZE_V1   2
 611
 612 #define SERIAL_PARANOIA_CHECK
 613 #undef  CY_DEBUG_OPEN
 614 #undef  CY_DEBUG_THROTTLE
 615 #undef  CY_DEBUG_OTHER
 616 #undef  CY_DEBUG_IO
 617 #undef  CY_DEBUG_COUNT
 618 #undef  CY_DEBUG_DTR
 619 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 620 #undef  CY_DEBUG_INTERRUPTS
 621 #undef  CY_16Y_HACK
 622 #undef  CY_ENABLE_MONITORING
 623 #undef  CY_PCI_DEBUG
 624
 625 /*
 626  * Include section
 627  */
 628 #include <linux/module.h>
 629 #include <linux/errno.h>
 630 #include <linux/signal.h>
 631 #include <linux/sched.h>
 632 #include <linux/timer.h>
 633 #include <linux/interrupt.h>
 634 #include <linux/tty.h>
 635 #include <linux/tty_flip.h>
 636 #include <linux/serial.h>
 637 #include <linux/major.h>
 638 #include <linux/string.h>
 639 #include <linux/fcntl.h>
 640 #include <linux/ptrace.h>
 641 #include <linux/cyclades.h>
 642 #include <linux/mm.h>
 643 #include <linux/ioport.h>
 644 #include <linux/init.h>
 645 #include <linux/delay.h>
 646 #include <linux/spinlock.h>
 647 #include <linux/bitops.h>
 648 #include <linux/firmware.h>
 649
 650 #include <asm/system.h>
 651 #include <linux/io.h>
 652 #include <asm/irq.h>
 653 #include <linux/uaccess.h>
 654
 655 #include <linux/kernel.h>
 656 #include <linux/pci.h>
 657
 658 #include <linux/stat.h>
 659 #include <linux/proc_fs.h>
 660
 661 static void cy_throttle(struct tty_struct *tty);
 662 static void cy_send_xchar(struct tty_struct *tty, char ch);
 663
 664 #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
 665
 666 #define Z_FPGA_CHECK(card) \
 667         ((readl(&((struct RUNTIME_9060 __iomem *) \
 668                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 669
 670 #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
 671                         ((card).ctl_addr))->mail_box_0)) || \
 672                         Z_FPGA_CHECK(card)) && \
 673                         (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
 674                         ((card).base_addr+ID_ADDRESS))->signature)))
 675
 676 #ifndef SERIAL_XMIT_SIZE
 677 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 678 #endif
 679 #define WAKEUP_CHARS            256
 680
 681 #define STD_COM_FLAGS (0)
 682
 683 /* firmware stuff */
 684 #define ZL_MAX_BLOCKS   16
 685 #define DRIVER_VERSION  0x02010203
 686 #define RAM_SIZE 0x80000
 687
 688 #define Z_FPGA_LOADED(X)        ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
 689
 690 enum zblock_type {
 691         ZBLOCK_PRG = 0,
 692         ZBLOCK_FPGA = 1
 693 };
 694
 695 struct zfile_header {
 696         char name[64];
 697         char date[32];
 698         char aux[32];
 699         u32 n_config;
 700         u32 config_offset;
 701         u32 n_blocks;
 702         u32 block_offset;
 703         u32 reserved[9];
 704 } __attribute__ ((packed));
 705
 706 struct zfile_config {
 707         char name[64];
 708         u32 mailbox;
 709         u32 function;
 710         u32 n_blocks;
 711         u32 block_list[ZL_MAX_BLOCKS];
 712 } __attribute__ ((packed));
 713
 714 struct zfile_block {
 715         u32 type;
 716         u32 file_offset;
 717         u32 ram_offset;
 718         u32 size;
 719 } __attribute__ ((packed));
 720
 721 static struct tty_driver *cy_serial_driver;
 722
 723 #ifdef CONFIG_ISA
 724 /* This is the address lookup table. The driver will probe for
 725    Cyclom-Y/ISA boards at all addresses in here. If you want the
 726    driver to probe addresses at a different address, add it to
 727    this table.  If the driver is probing some other board and
 728    causing problems, remove the offending address from this table.
 729 */
 730
 731 static unsigned int cy_isa_addresses[] = {
 732         0xD0000,
 733         0xD2000,
 734         0xD4000,
 735         0xD6000,
 736         0xD8000,
 737         0xDA000,
 738         0xDC000,
 739         0xDE000,
 740         0, 0, 0, 0, 0, 0, 0, 0
 741 };
 742
 743 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 744
 745 #ifdef MODULE
 746 static long maddr[NR_CARDS];
 747 static int irq[NR_CARDS];
 748
 749 module_param_array(maddr, long, NULL, 0);
 750 module_param_array(irq, int, NULL, 0);
 751 #endif
 752
 753 #endif                          /* CONFIG_ISA */
 754
 755 /* This is the per-card data structure containing address, irq, number of
 756    channels, etc. This driver supports a maximum of NR_CARDS cards.
 757 */
 758 static struct cyclades_card cy_card[NR_CARDS];
 759
 760 static int cy_next_channel;     /* next minor available */
 761
 762 /*
 763  * This is used to look up the divisor speeds and the timeouts
 764  * We're normally limited to 15 distinct baud rates.  The extra
 765  * are accessed via settings in info->flags.
 766  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 767  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 768  *                                               HI            VHI
 769  *     20
 770  */
 771 static int baud_table[] = {
 772         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 773         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 774         230400, 0
 775 };
 776
 777 static char baud_co_25[] = {    /* 25 MHz clock option table */
 778         /* value =>    00    01   02    03    04 */
 779         /* divide by    8    32   128   512  2048 */
 780         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 781         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 782 };
 783
 784 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 785         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 786         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 787 };
 788
 789 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 790         /* value =>    00    01   02    03    04 */
 791         /* divide by    8    32   128   512  2048 */
 792         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 793         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 794         0x00
 795 };
 796
 797 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 798         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 799         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 800         0x21
 801 };
 802
 803 static char baud_cor3[] = {     /* receive threshold */
 804         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 805         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 806         0x07
 807 };
 808
 809 /*
 810  * The Cyclades driver implements HW flow control as any serial driver.
 811  * The cyclades_port structure member rflow and the vector rflow_thr
 812  * allows us to take advantage of a special feature in the CD1400 to avoid
 813  * data loss even when the system interrupt latency is too high. These flags
 814  * are to be used only with very special applications. Setting these flags
 815  * requires the use of a special cable (DTR and RTS reversed). In the new
 816  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 817  * cables.
 818  */
 819
 820 static char rflow_thr[] = {     /* rflow threshold */
 821         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 822         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 823         0x0a
 824 };
 825
 826 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 827  *  address order.  This look-up table overcomes that problem.
 828  */
 829 static int cy_chip_offset[] = { 0x0000,
 830         0x0400,
 831         0x0800,
 832         0x0C00,
 833         0x0200,
 834         0x0600,
 835         0x0A00,
 836         0x0E00
 837 };
 838
 839 /* PCI related definitions */
 840
 841 #ifdef CONFIG_PCI
 842 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 843         /* PCI < 1Mb */
 844         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
 845         /* PCI > 1Mb */
 846         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
 847         /* 4Y PCI < 1Mb */
 848         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
 849         /* 4Y PCI > 1Mb */
 850         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
 851         /* 8Y PCI < 1Mb */
 852         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
 853         /* 8Y PCI > 1Mb */
 854         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
 855         /* Z PCI < 1Mb */
 856         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
 857         /* Z PCI > 1Mb */
 858         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
 859         { }                     /* end of table */
 860 };
 861 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 862 #endif
 863
 864 static void cy_start(struct tty_struct *);
 865 static void set_line_char(struct cyclades_port *);
 866 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 867 #ifdef CONFIG_ISA
 868 static unsigned detect_isa_irq(void __iomem *);
 869 #endif                          /* CONFIG_ISA */
 870
 871 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 872
 873 #ifndef CONFIG_CYZ_INTR
 874 static void cyz_poll(unsigned long);
 875
 876 /* The Cyclades-Z polling cycle is defined by this variable */
 877 static long cyz_polling_cycle = CZ_DEF_POLL;
 878
 879 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 880
 881 #else                           /* CONFIG_CYZ_INTR */
 882 static void cyz_rx_restart(unsigned long);
 883 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 884 #endif                          /* CONFIG_CYZ_INTR */
 885
 886 static inline int serial_paranoia_check(struct cyclades_port *info,
 887                 char *name, const char *routine)
 888 {
 889 #ifdef SERIAL_PARANOIA_CHECK
 890         if (!info) {
 891                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 892                                 "in %s\n", name, routine);
 893                 return 1;
 894         }
 895
 896         if (info->magic != CYCLADES_MAGIC) {
 897                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 898                                 "struct (%s) in %s\n", name, routine);
 899                 return 1;
 900         }
 901 #endif
 902         return 0;
 903 }                               /* serial_paranoia_check */
 904
 905 /***********************************************************/
 906 /********* Start of block of Cyclom-Y specific code ********/
 907
 908 /* This routine waits up to 1000 micro-seconds for the previous
 909    command to the Cirrus chip to complete and then issues the
 910    new command.  An error is returned if the previous command
 911    didn't finish within the time limit.
 912
 913    This function is only called from inside spinlock-protected code.
 914  */
 915 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
 916 {
 917         unsigned int i;
 918
 919         /* Check to see that the previous command has completed */
 920         for (i = 0; i < 100; i++) {
 921                 if (readb(base_addr + (CyCCR << index)) == 0)
 922                         break;
 923                 udelay(10L);
 924         }
 925         /* if the CCR never cleared, the previous command
 926            didn't finish within the "reasonable time" */
 927         if (i == 100)
 928                 return -1;
 929
 930         /* Issue the new command */
 931         cy_writeb(base_addr + (CyCCR << index), cmd);
 932
 933         return 0;
 934 }                               /* cyy_issue_cmd */
 935
 936 #ifdef CONFIG_ISA
 937 /* ISA interrupt detection code */
 938 static unsigned detect_isa_irq(void __iomem *address)
 939 {
 940         int irq;
 941         unsigned long irqs, flags;
 942         int save_xir, save_car;
 943         int index = 0;          /* IRQ probing is only for ISA */
 944
 945         /* forget possible initially masked and pending IRQ */
 946         irq = probe_irq_off(probe_irq_on());
 947
 948         /* Clear interrupts on the board first */
 949         cy_writeb(address + (Cy_ClrIntr << index), 0);
 950         /* Cy_ClrIntr is 0x1800 */
 951
 952         irqs = probe_irq_on();
 953         /* Wait ... */
 954         udelay(5000L);
 955
 956         /* Enable the Tx interrupts on the CD1400 */
 957         local_irq_save(flags);
 958         cy_writeb(address + (CyCAR << index), 0);
 959         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
 960
 961         cy_writeb(address + (CyCAR << index), 0);
 962         cy_writeb(address + (CySRER << index),
 963                   readb(address + (CySRER << index)) | CyTxRdy);
 964         local_irq_restore(flags);
 965
 966         /* Wait ... */
 967         udelay(5000L);
 968
 969         /* Check which interrupt is in use */
 970         irq = probe_irq_off(irqs);
 971
 972         /* Clean up */
 973         save_xir = (u_char) readb(address + (CyTIR << index));
 974         save_car = readb(address + (CyCAR << index));
 975         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
 976         cy_writeb(address + (CySRER << index),
 977                   readb(address + (CySRER << index)) & ~CyTxRdy);
 978         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
 979         cy_writeb(address + (CyCAR << index), (save_car));
 980         cy_writeb(address + (Cy_ClrIntr << index), 0);
 981         /* Cy_ClrIntr is 0x1800 */
 982
 983         return (irq > 0) ? irq : 0;
 984 }
 985 #endif                          /* CONFIG_ISA */
 986
 987 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
 988                 void __iomem *base_addr)
 989 {
 990         struct cyclades_port *info;
 991         struct tty_struct *tty;
 992         int len, index = cinfo->bus_index;
 993         u8 save_xir, channel, save_car, data, char_count;
 994
 995 #ifdef CY_DEBUG_INTERRUPTS
 996         printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
 997 #endif
 998         /* determine the channel & change to that context */
 999         save_xir = readb(base_addr + (CyRIR << index));
1000         channel = save_xir & CyIRChannel;
1001         info = &cinfo->ports[channel + chip * 4];
1002         save_car = readb(base_addr + (CyCAR << index));
1003         cy_writeb(base_addr + (CyCAR << index), save_xir);
1004
1005         /* if there is nowhere to put the data, discard it */
1006         if (info->tty == NULL) {
1007                 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1008                                 CyIVRRxEx) {    /* exception */
1009                         data = readb(base_addr + (CyRDSR << index));
1010                 } else {        /* normal character reception */
1011                         char_count = readb(base_addr + (CyRDCR << index));
1012                         while (char_count--)
1013                                 data = readb(base_addr + (CyRDSR << index));
1014                 }
1015                 goto end;
1016         }
1017         /* there is an open port for this data */
1018         tty = info->tty;
1019         if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020                         CyIVRRxEx) {    /* exception */
1021                 data = readb(base_addr + (CyRDSR << index));
1022
1023                 /* For statistics only */
1024                 if (data & CyBREAK)
1025                         info->icount.brk++;
1026                 else if (data & CyFRAME)
1027                         info->icount.frame++;
1028                 else if (data & CyPARITY)
1029                         info->icount.parity++;
1030                 else if (data & CyOVERRUN)
1031                         info->icount.overrun++;
1032
1033                 if (data & info->ignore_status_mask) {
1034                         info->icount.rx++;
1035                         return;
1036                 }
1037                 if (tty_buffer_request_room(tty, 1)) {
1038                         if (data & info->read_status_mask) {
1039                                 if (data & CyBREAK) {
1040                                         tty_insert_flip_char(tty,
1041                                                 readb(base_addr + (CyRDSR <<
1042                                                         index)), TTY_BREAK);
1043                                         info->icount.rx++;
1044                                         if (info->flags & ASYNC_SAK)
1045                                                 do_SAK(tty);
1046                                 } else if (data & CyFRAME) {
1047                                         tty_insert_flip_char(tty,
1048                                                 readb(base_addr + (CyRDSR <<
1049                                                         index)), TTY_FRAME);
1050                                         info->icount.rx++;
1051                                         info->idle_stats.frame_errs++;
1052                                 } else if (data & CyPARITY) {
1053                                         /* Pieces of seven... */
1054                                         tty_insert_flip_char(tty,
1055                                                 readb(base_addr + (CyRDSR <<
1056                                                         index)), TTY_PARITY);
1057                                         info->icount.rx++;
1058                                         info->idle_stats.parity_errs++;
1059                                 } else if (data & CyOVERRUN) {
1060                                         tty_insert_flip_char(tty, 0,
1061                                                         TTY_OVERRUN);
1062                                         info->icount.rx++;
1063                                         /* If the flip buffer itself is
1064                                            overflowing, we still lose
1065                                            the next incoming character.
1066                                          */
1067                                         tty_insert_flip_char(tty,
1068                                                 readb(base_addr + (CyRDSR <<
1069                                                         index)), TTY_FRAME);
1070                                         info->icount.rx++;
1071                                         info->idle_stats.overruns++;
1072                                 /* These two conditions may imply */
1073                                 /* a normal read should be done. */
1074                                 /* } else if(data & CyTIMEOUT) { */
1075                                 /* } else if(data & CySPECHAR) { */
1076                                 } else {
1077                                         tty_insert_flip_char(tty, 0,
1078                                                         TTY_NORMAL);
1079                                         info->icount.rx++;
1080                                 }
1081                         } else {
1082                                 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1083                                 info->icount.rx++;
1084                         }
1085                 } else {
1086                         /* there was a software buffer overrun and nothing
1087                          * could be done about it!!! */
1088                         info->icount.buf_overrun++;
1089                         info->idle_stats.overruns++;
1090                 }
1091         } else {        /* normal character reception */
1092                 /* load # chars available from the chip */
1093                 char_count = readb(base_addr + (CyRDCR << index));
1094
1095 #ifdef CY_ENABLE_MONITORING
1096                 ++info->mon.int_count;
1097                 info->mon.char_count += char_count;
1098                 if (char_count > info->mon.char_max)
1099                         info->mon.char_max = char_count;
1100                 info->mon.char_last = char_count;
1101 #endif
1102                 len = tty_buffer_request_room(tty, char_count);
1103                 while (len--) {
1104                         data = readb(base_addr + (CyRDSR << index));
1105                         tty_insert_flip_char(tty, data, TTY_NORMAL);
1106                         info->idle_stats.recv_bytes++;
1107                         info->icount.rx++;
1108 #ifdef CY_16Y_HACK
1109                         udelay(10L);
1110 #endif
1111                 }
1112                 info->idle_stats.recv_idle = jiffies;
1113         }
1114         tty_schedule_flip(tty);
1115 end:
1116         /* end of service */
1117         cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1118         cy_writeb(base_addr + (CyCAR << index), save_car);
1119 }
1120
1121 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1122                 void __iomem *base_addr)
1123 {
1124         struct cyclades_port *info;
1125         int char_count, index = cinfo->bus_index;
1126         u8 save_xir, channel, save_car, outch;
1127
1128         /* Since we only get here when the transmit buffer
1129            is empty, we know we can always stuff a dozen
1130            characters. */
1131 #ifdef CY_DEBUG_INTERRUPTS
1132         printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1133 #endif
1134
1135         /* determine the channel & change to that context */
1136         save_xir = readb(base_addr + (CyTIR << index));
1137         channel = save_xir & CyIRChannel;
1138         save_car = readb(base_addr + (CyCAR << index));
1139         cy_writeb(base_addr + (CyCAR << index), save_xir);
1140
1141         /* validate the port# (as configured and open) */
1142         if (channel + chip * 4 >= cinfo->nports) {
1143                 cy_writeb(base_addr + (CySRER << index),
1144                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1145                 goto end;
1146         }
1147         info = &cinfo->ports[channel + chip * 4];
1148         if (info->tty == NULL) {
1149                 cy_writeb(base_addr + (CySRER << index),
1150                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1151                 goto end;
1152         }
1153
1154         /* load the on-chip space for outbound data */
1155         char_count = info->xmit_fifo_size;
1156
1157         if (info->x_char) {     /* send special char */
1158                 outch = info->x_char;
1159                 cy_writeb(base_addr + (CyTDR << index), outch);
1160                 char_count--;
1161                 info->icount.tx++;
1162                 info->x_char = 0;
1163         }
1164
1165         if (info->breakon || info->breakoff) {
1166                 if (info->breakon) {
1167                         cy_writeb(base_addr + (CyTDR << index), 0);
1168                         cy_writeb(base_addr + (CyTDR << index), 0x81);
1169                         info->breakon = 0;
1170                         char_count -= 2;
1171                 }
1172                 if (info->breakoff) {
1173                         cy_writeb(base_addr + (CyTDR << index), 0);
1174                         cy_writeb(base_addr + (CyTDR << index), 0x83);
1175                         info->breakoff = 0;
1176                         char_count -= 2;
1177                 }
1178         }
1179
1180         while (char_count-- > 0) {
1181                 if (!info->xmit_cnt) {
1182                         if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1183                                 cy_writeb(base_addr + (CySRER << index),
1184                                         readb(base_addr + (CySRER << index)) &
1185                                                 ~CyTxMpty);
1186                         } else {
1187                                 cy_writeb(base_addr + (CySRER << index),
1188                                         (readb(base_addr + (CySRER << index)) &
1189                                                 ~CyTxRdy) | CyTxMpty);
1190                         }
1191                         goto done;
1192                 }
1193                 if (info->xmit_buf == NULL) {
1194                         cy_writeb(base_addr + (CySRER << index),
1195                                 readb(base_addr + (CySRER << index)) &
1196                                         ~CyTxRdy);
1197                         goto done;
1198                 }
1199                 if (info->tty->stopped || info->tty->hw_stopped) {
1200                         cy_writeb(base_addr + (CySRER << index),
1201                                 readb(base_addr + (CySRER << index)) &
1202                                         ~CyTxRdy);
1203                         goto done;
1204                 }
1205                 /* Because the Embedded Transmit Commands have been enabled,
1206                  * we must check to see if the escape character, NULL, is being
1207                  * sent. If it is, we must ensure that there is room for it to
1208                  * be doubled in the output stream.  Therefore we no longer
1209                  * advance the pointer when the character is fetched, but
1210                  * rather wait until after the check for a NULL output
1211                  * character. This is necessary because there may not be room
1212                  * for the two chars needed to send a NULL.)
1213                  */
1214                 outch = info->xmit_buf[info->xmit_tail];
1215                 if (outch) {
1216                         info->xmit_cnt--;
1217                         info->xmit_tail = (info->xmit_tail + 1) &
1218                                         (SERIAL_XMIT_SIZE - 1);
1219                         cy_writeb(base_addr + (CyTDR << index), outch);
1220                         info->icount.tx++;
1221                 } else {
1222                         if (char_count > 1) {
1223                                 info->xmit_cnt--;
1224                                 info->xmit_tail = (info->xmit_tail + 1) &
1225                                         (SERIAL_XMIT_SIZE - 1);
1226                                 cy_writeb(base_addr + (CyTDR << index), outch);
1227                                 cy_writeb(base_addr + (CyTDR << index), 0);
1228                                 info->icount.tx++;
1229                                 char_count--;
1230                         }
1231                 }
1232         }
1233
1234 done:
1235         tty_wakeup(info->tty);
1236 end:
1237         /* end of service */
1238         cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239         cy_writeb(base_addr + (CyCAR << index), save_car);
1240 }
1241
1242 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243                 void __iomem *base_addr)
1244 {
1245         struct cyclades_port *info;
1246         int index = cinfo->bus_index;
1247         u8 save_xir, channel, save_car, mdm_change, mdm_status;
1248
1249         /* determine the channel & change to that context */
1250         save_xir = readb(base_addr + (CyMIR << index));
1251         channel = save_xir & CyIRChannel;
1252         info = &cinfo->ports[channel + chip * 4];
1253         save_car = readb(base_addr + (CyCAR << index));
1254         cy_writeb(base_addr + (CyCAR << index), save_xir);
1255
1256         mdm_change = readb(base_addr + (CyMISR << index));
1257         mdm_status = readb(base_addr + (CyMSVR1 << index));
1258
1259         if (!info->tty)
1260                 goto end;
1261
1262         if (mdm_change & CyANY_DELTA) {
1263                 /* For statistics only */
1264                 if (mdm_change & CyDCD)
1265                         info->icount.dcd++;
1266                 if (mdm_change & CyCTS)
1267                         info->icount.cts++;
1268                 if (mdm_change & CyDSR)
1269                         info->icount.dsr++;
1270                 if (mdm_change & CyRI)
1271                         info->icount.rng++;
1272
1273                 wake_up_interruptible(&info->delta_msr_wait);
1274         }
1275
1276         if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1277                 if (!(mdm_status & CyDCD)) {
1278                         tty_hangup(info->tty);
1279                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1280                 }
1281                 wake_up_interruptible(&info->open_wait);
1282         }
1283         if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1284                 if (info->tty->hw_stopped) {
1285                         if (mdm_status & CyCTS) {
1286                                 /* cy_start isn't used
1287                                    because... !!! */
1288                                 info->tty->hw_stopped = 0;
1289                                 cy_writeb(base_addr + (CySRER << index),
1290                                         readb(base_addr + (CySRER << index)) |
1291                                                 CyTxRdy);
1292                                 tty_wakeup(info->tty);
1293                         }
1294                 } else {
1295                         if (!(mdm_status & CyCTS)) {
1296                                 /* cy_stop isn't used
1297                                    because ... !!! */
1298                                 info->tty->hw_stopped = 1;
1299                                 cy_writeb(base_addr + (CySRER << index),
1300                                         readb(base_addr + (CySRER << index)) &
1301                                                 ~CyTxRdy);
1302                         }
1303                 }
1304         }
1305 /*      if (mdm_change & CyDSR) {
1306         }
1307         if (mdm_change & CyRI) {
1308         }*/
1309 end:
1310         /* end of service */
1311         cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312         cy_writeb(base_addr + (CyCAR << index), save_car);
1313 }
1314
1315 /* The real interrupt service routine is called
1316    whenever the card wants its hand held--chars
1317    received, out buffer empty, modem change, etc.
1318  */
1319 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1320 {
1321         int status;
1322         struct cyclades_card *cinfo = dev_id;
1323         void __iomem *base_addr, *card_base_addr;
1324         unsigned int chip, too_many, had_work;
1325         int index;
1326
1327         if (unlikely(cinfo == NULL)) {
1328 #ifdef CY_DEBUG_INTERRUPTS
1329                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1330                                 irq);
1331 #endif
1332                 return IRQ_NONE;        /* spurious interrupt */
1333         }
1334
1335         card_base_addr = cinfo->base_addr;
1336         index = cinfo->bus_index;
1337
1338         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339         if (unlikely(card_base_addr == NULL))
1340                 return IRQ_HANDLED;
1341
1342         /* This loop checks all chips in the card.  Make a note whenever
1343            _any_ chip had some work to do, as this is considered an
1344            indication that there will be more to do.  Only when no chip
1345            has any work does this outermost loop exit.
1346          */
1347         do {
1348                 had_work = 0;
1349                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350                         base_addr = cinfo->base_addr +
1351                                         (cy_chip_offset[chip] << index);
1352                         too_many = 0;
1353                         while ((status = readb(base_addr +
1354                                                 (CySVRR << index))) != 0x00) {
1355                                 had_work++;
1356                         /* The purpose of the following test is to ensure that
1357                            no chip can monopolize the driver.  This forces the
1358                            chips to be checked in a round-robin fashion (after
1359                            draining each of a bunch (1000) of characters).
1360                          */
1361                                 if (1000 < too_many++)
1362                                         break;
1363                                 spin_lock(&cinfo->card_lock);
1364                                 if (status & CySRReceive) /* rx intr */
1365                                         cyy_chip_rx(cinfo, chip, base_addr);
1366                                 if (status & CySRTransmit) /* tx intr */
1367                                         cyy_chip_tx(cinfo, chip, base_addr);
1368                                 if (status & CySRModem) /* modem intr */
1369                                         cyy_chip_modem(cinfo, chip, base_addr);
1370                                 spin_unlock(&cinfo->card_lock);
1371                         }
1372                 }
1373         } while (had_work);
1374
1375         /* clear interrupts */
1376         spin_lock(&cinfo->card_lock);
1377         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378         /* Cy_ClrIntr is 0x1800 */
1379         spin_unlock(&cinfo->card_lock);
1380         return IRQ_HANDLED;
1381 }                               /* cyy_interrupt */
1382
1383 /***********************************************************/
1384 /********* End of block of Cyclom-Y specific code **********/
1385 /******** Start of block of Cyclades-Z specific code *******/
1386 /***********************************************************/
1387
1388 static int
1389 cyz_fetch_msg(struct cyclades_card *cinfo,
1390                 __u32 *channel, __u8 *cmd, __u32 *param)
1391 {
1392         struct FIRM_ID __iomem *firm_id;
1393         struct ZFW_CTRL __iomem *zfw_ctrl;
1394         struct BOARD_CTRL __iomem *board_ctrl;
1395         unsigned long loc_doorbell;
1396
1397         firm_id = cinfo->base_addr + ID_ADDRESS;
1398         if (!ISZLOADED(*cinfo))
1399                 return -1;
1400         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1401         board_ctrl = &zfw_ctrl->board_ctrl;
1402
1403         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1404                                   (cinfo->ctl_addr))->loc_doorbell);
1405         if (loc_doorbell) {
1406                 *cmd = (char)(0xff & loc_doorbell);
1407                 *channel = readl(&board_ctrl->fwcmd_channel);
1408                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1409                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1410                           loc_doorbell, 0xffffffff);
1411                 return 1;
1412         }
1413         return 0;
1414 }                               /* cyz_fetch_msg */
1415
1416 static int
1417 cyz_issue_cmd(struct cyclades_card *cinfo,
1418                 __u32 channel, __u8 cmd, __u32 param)
1419 {
1420         struct FIRM_ID __iomem *firm_id;
1421         struct ZFW_CTRL __iomem *zfw_ctrl;
1422         struct BOARD_CTRL __iomem *board_ctrl;
1423         __u32 __iomem *pci_doorbell;
1424         unsigned int index;
1425
1426         firm_id = cinfo->base_addr + ID_ADDRESS;
1427         if (!ISZLOADED(*cinfo))
1428                 return -1;
1429
1430         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1431         board_ctrl = &zfw_ctrl->board_ctrl;
1432
1433         index = 0;
1434         pci_doorbell =
1435             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1436         while ((readl(pci_doorbell) & 0xff) != 0) {
1437                 if (index++ == 1000)
1438                         return (int)(readl(pci_doorbell) & 0xff);
1439                 udelay(50L);
1440         }
1441         cy_writel(&board_ctrl->hcmd_channel, channel);
1442         cy_writel(&board_ctrl->hcmd_param, param);
1443         cy_writel(pci_doorbell, (long)cmd);
1444
1445         return 0;
1446 }                               /* cyz_issue_cmd */
1447
1448 static void cyz_handle_rx(struct cyclades_port *info,
1449                 struct BUF_CTRL __iomem *buf_ctrl)
1450 {
1451         struct cyclades_card *cinfo = info->card;
1452         struct tty_struct *tty = info->tty;
1453         unsigned int char_count;
1454         int len;
1455 #ifdef BLOCKMOVE
1456         unsigned char *buf;
1457 #else
1458         char data;
1459 #endif
1460         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1461
1462         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1463         rx_put = readl(&buf_ctrl->rx_put);
1464         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1465         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1466         if (rx_put >= rx_get)
1467                 char_count = rx_put - rx_get;
1468         else
1469                 char_count = rx_put - rx_get + rx_bufsize;
1470
1471         if (char_count) {
1472 #ifdef CY_ENABLE_MONITORING
1473                 info->mon.int_count++;
1474                 info->mon.char_count += char_count;
1475                 if (char_count > info->mon.char_max)
1476                         info->mon.char_max = char_count;
1477                 info->mon.char_last = char_count;
1478 #endif
1479                 if (tty == NULL) {
1480                         /* flush received characters */
1481                         new_rx_get = (new_rx_get + char_count) &
1482                                         (rx_bufsize - 1);
1483                         info->rflush_count++;
1484                 } else {
1485 #ifdef BLOCKMOVE
1486                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1487                    for performance, but because of buffer boundaries, there
1488                    may be several steps to the operation */
1489                         while (1) {
1490                                 len = tty_prepare_flip_string(tty, &buf,
1491                                                 char_count);
1492                                 if (!len)
1493                                         break;
1494
1495                                 len = min_t(unsigned int, min(len, char_count),
1496                                                 rx_bufsize - new_rx_get);
1497
1498                                 memcpy_fromio(buf, cinfo->base_addr +
1499                                                 rx_bufaddr + new_rx_get, len);
1500
1501                                 new_rx_get = (new_rx_get + len) &
1502                                                 (rx_bufsize - 1);
1503                                 char_count -= len;
1504                                 info->icount.rx += len;
1505                                 info->idle_stats.recv_bytes += len;
1506                         }
1507 #else
1508                         len = tty_buffer_request_room(tty, char_count);
1509                         while (len--) {
1510                                 data = readb(cinfo->base_addr + rx_bufaddr +
1511                                                 new_rx_get);
1512                                 new_rx_get = (new_rx_get + 1) &
1513                                                         (rx_bufsize - 1);
1514                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515                                 info->idle_stats.recv_bytes++;
1516                                 info->icount.rx++;
1517                         }
1518 #endif
1519 #ifdef CONFIG_CYZ_INTR
1520                 /* Recalculate the number of chars in the RX buffer and issue
1521                    a cmd in case it's higher than the RX high water mark */
1522                         rx_put = readl(&buf_ctrl->rx_put);
1523                         if (rx_put >= rx_get)
1524                                 char_count = rx_put - rx_get;
1525                         else
1526                                 char_count = rx_put - rx_get + rx_bufsize;
1527                         if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1528                                         !timer_pending(&cyz_rx_full_timer[
1529                                                         info->line]))
1530                                 mod_timer(&cyz_rx_full_timer[info->line],
1531                                                 jiffies + 1);
1532 #endif
1533                         info->idle_stats.recv_idle = jiffies;
1534                         tty_schedule_flip(tty);
1535                 }
1536                 /* Update rx_get */
1537                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1538         }
1539 }
1540
1541 static void cyz_handle_tx(struct cyclades_port *info,
1542                 struct BUF_CTRL __iomem *buf_ctrl)
1543 {
1544         struct cyclades_card *cinfo = info->card;
1545         struct tty_struct *tty = info->tty;
1546         u8 data;
1547         unsigned int char_count;
1548 #ifdef BLOCKMOVE
1549         int small_count;
1550 #endif
1551         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1552
1553         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1554                 return;
1555
1556         tx_get = readl(&buf_ctrl->tx_get);
1557         tx_put = readl(&buf_ctrl->tx_put);
1558         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1559         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1560         if (tx_put >= tx_get)
1561                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1562         else
1563                 char_count = tx_get - tx_put - 1;
1564
1565         if (char_count) {
1566
1567                 if (tty == NULL)
1568                         goto ztxdone;
1569
1570                 if (info->x_char) {     /* send special char */
1571                         data = info->x_char;
1572
1573                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1575                         info->x_char = 0;
1576                         char_count--;
1577                         info->icount.tx++;
1578                 }
1579 #ifdef BLOCKMOVE
1580                 while (0 < (small_count = min_t(unsigned int,
1581                                 tx_bufsize - tx_put, min_t(unsigned int,
1582                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1583                                         min_t(unsigned int, info->xmit_cnt,
1584                                                 char_count))))) {
1585
1586                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1587                                         tx_put),
1588                                         &info->xmit_buf[info->xmit_tail],
1589                                         small_count);
1590
1591                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1592                         char_count -= small_count;
1593                         info->icount.tx += small_count;
1594                         info->xmit_cnt -= small_count;
1595                         info->xmit_tail = (info->xmit_tail + small_count) &
1596                                         (SERIAL_XMIT_SIZE - 1);
1597                 }
1598 #else
1599                 while (info->xmit_cnt && char_count) {
1600                         data = info->xmit_buf[info->xmit_tail];
1601                         info->xmit_cnt--;
1602                         info->xmit_tail = (info->xmit_tail + 1) &
1603                                         (SERIAL_XMIT_SIZE - 1);
1604
1605                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1607                         char_count--;
1608                         info->icount.tx++;
1609                 }
1610 #endif
1611                 tty_wakeup(tty);
1612 ztxdone:
1613                 /* Update tx_put */
1614                 cy_writel(&buf_ctrl->tx_put, tx_put);
1615         }
1616 }
1617
1618 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1619 {
1620         struct tty_struct *tty;
1621         struct cyclades_port *info;
1622         static struct FIRM_ID __iomem *firm_id;
1623         static struct ZFW_CTRL __iomem *zfw_ctrl;
1624         static struct BOARD_CTRL __iomem *board_ctrl;
1625         static struct CH_CTRL __iomem *ch_ctrl;
1626         static struct BUF_CTRL __iomem *buf_ctrl;
1627         __u32 channel;
1628         __u8 cmd;
1629         __u32 param;
1630         __u32 hw_ver, fw_ver;
1631         int special_count;
1632         int delta_count;
1633
1634         firm_id = cinfo->base_addr + ID_ADDRESS;
1635         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1636         board_ctrl = &zfw_ctrl->board_ctrl;
1637         fw_ver = readl(&board_ctrl->fw_version);
1638         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1639                         mail_box_0);
1640
1641         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1642                 special_count = 0;
1643                 delta_count = 0;
1644                 info = &cinfo->ports[channel];
1645                 tty = info->tty;
1646                 if (tty == NULL)
1647                         continue;
1648
1649                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1651
1652                 switch (cmd) {
1653                 case C_CM_PR_ERROR:
1654                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1655                         info->icount.rx++;
1656                         special_count++;
1657                         break;
1658                 case C_CM_FR_ERROR:
1659                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1660                         info->icount.rx++;
1661                         special_count++;
1662                         break;
1663                 case C_CM_RXBRK:
1664                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1665                         info->icount.rx++;
1666                         special_count++;
1667                         break;
1668                 case C_CM_MDCD:
1669                         info->icount.dcd++;
1670                         delta_count++;
1671                         if (info->flags & ASYNC_CHECK_CD) {
1672                                 if ((fw_ver > 241 ? ((u_long) param) :
1673                                                 readl(&ch_ctrl->rs_status)) &
1674                                                 C_RS_DCD) {
1675                                         wake_up_interruptible(&info->open_wait);
1676                                 } else {
1677                                         tty_hangup(info->tty);
1678                                         wake_up_interruptible(&info->open_wait);
1679                                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1680                                 }
1681                         }
1682                         break;
1683                 case C_CM_MCTS:
1684                         info->icount.cts++;
1685                         delta_count++;
1686                         break;
1687                 case C_CM_MRI:
1688                         info->icount.rng++;
1689                         delta_count++;
1690                         break;
1691                 case C_CM_MDSR:
1692                         info->icount.dsr++;
1693                         delta_count++;
1694                         break;
1695 #ifdef Z_WAKE
1696                 case C_CM_IOCTLW:
1697                         complete(&info->shutdown_wait);
1698                         break;
1699 #endif
1700 #ifdef CONFIG_CYZ_INTR
1701                 case C_CM_RXHIWM:
1702                 case C_CM_RXNNDT:
1703                 case C_CM_INTBACK2:
1704                         /* Reception Interrupt */
1705 #ifdef CY_DEBUG_INTERRUPTS
1706                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707                                         "port %ld\n", info->card, channel);
1708 #endif
1709                         cyz_handle_rx(info, buf_ctrl);
1710                         break;
1711                 case C_CM_TXBEMPTY:
1712                 case C_CM_TXLOWWM:
1713                 case C_CM_INTBACK:
1714                         /* Transmission Interrupt */
1715 #ifdef CY_DEBUG_INTERRUPTS
1716                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717                                         "port %ld\n", info->card, channel);
1718 #endif
1719                         cyz_handle_tx(info, buf_ctrl);
1720                         break;
1721 #endif                          /* CONFIG_CYZ_INTR */
1722                 case C_CM_FATAL:
1723                         /* should do something with this !!! */
1724                         break;
1725                 default:
1726                         break;
1727                 }
1728                 if (delta_count)
1729                         wake_up_interruptible(&info->delta_msr_wait);
1730                 if (special_count)
1731                         tty_schedule_flip(tty);
1732         }
1733 }
1734
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1737 {
1738         struct cyclades_card *cinfo = dev_id;
1739
1740         if (unlikely(cinfo == NULL)) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1743                                                                         irq);
1744 #endif
1745                 return IRQ_NONE;        /* spurious interrupt */
1746         }
1747
1748         if (unlikely(!ISZLOADED(*cinfo))) {
1749 #ifdef CY_DEBUG_INTERRUPTS
1750                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1751                                 "(IRQ%d).\n", irq);
1752 #endif
1753                 return IRQ_NONE;
1754         }
1755
1756         /* Handle the interrupts */
1757         cyz_handle_cmd(cinfo);
1758
1759         return IRQ_HANDLED;
1760 }                               /* cyz_interrupt */
1761
1762 static void cyz_rx_restart(unsigned long arg)
1763 {
1764         struct cyclades_port *info = (struct cyclades_port *)arg;
1765         struct cyclades_card *card = info->card;
1766         int retval;
1767         __u32 channel = info->line - card->first_line;
1768         unsigned long flags;
1769
1770         spin_lock_irqsave(&card->card_lock, flags);
1771         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1772         if (retval != 0) {
1773                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1774                         info->line, retval);
1775         }
1776         spin_unlock_irqrestore(&card->card_lock, flags);
1777 }
1778
1779 #else                           /* CONFIG_CYZ_INTR */
1780
1781 static void cyz_poll(unsigned long arg)
1782 {
1783         struct cyclades_card *cinfo;
1784         struct cyclades_port *info;
1785         struct tty_struct *tty;
1786         struct FIRM_ID __iomem *firm_id;
1787         struct ZFW_CTRL __iomem *zfw_ctrl;
1788         struct BOARD_CTRL __iomem *board_ctrl;
1789         struct BUF_CTRL __iomem *buf_ctrl;
1790         unsigned long expires = jiffies + HZ;
1791         unsigned int port, card;
1792
1793         for (card = 0; card < NR_CARDS; card++) {
1794                 cinfo = &cy_card[card];
1795
1796                 if (!IS_CYC_Z(*cinfo))
1797                         continue;
1798                 if (!ISZLOADED(*cinfo))
1799                         continue;
1800
1801                 firm_id = cinfo->base_addr + ID_ADDRESS;
1802                 zfw_ctrl = cinfo->base_addr +
1803                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1804                 board_ctrl = &(zfw_ctrl->board_ctrl);
1805
1806         /* Skip first polling cycle to avoid racing conditions with the FW */
1807                 if (!cinfo->intr_enabled) {
1808                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1809                         cinfo->intr_enabled = 1;
1810                         continue;
1811                 }
1812
1813                 cyz_handle_cmd(cinfo);
1814
1815                 for (port = 0; port < cinfo->nports; port++) {
1816                         info = &cinfo->ports[port];
1817                         tty = info->tty;
1818                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1819
1820                         if (!info->throttle)
1821                                 cyz_handle_rx(info, buf_ctrl);
1822                         cyz_handle_tx(info, buf_ctrl);
1823                 }
1824                 /* poll every 'cyz_polling_cycle' period */
1825                 expires = jiffies + cyz_polling_cycle;
1826         }
1827         mod_timer(&cyz_timerlist, expires);
1828 }                               /* cyz_poll */
1829
1830 #endif                          /* CONFIG_CYZ_INTR */
1831
1832 /********** End of block of Cyclades-Z specific code *********/
1833 /***********************************************************/
1834
1835 /* This is called whenever a port becomes active;
1836    interrupts are enabled and DTR & RTS are turned on.
1837  */
1838 static int startup(struct cyclades_port *info)
1839 {
1840         struct cyclades_card *card;
1841         unsigned long flags;
1842         int retval = 0;
1843         void __iomem *base_addr;
1844         int chip, channel, index;
1845         unsigned long page;
1846
1847         card = info->card;
1848         channel = info->line - card->first_line;
1849
1850         page = get_zeroed_page(GFP_KERNEL);
1851         if (!page)
1852                 return -ENOMEM;
1853
1854         spin_lock_irqsave(&card->card_lock, flags);
1855
1856         if (info->flags & ASYNC_INITIALIZED) {
1857                 free_page(page);
1858                 goto errout;
1859         }
1860
1861         if (!info->type) {
1862                 if (info->tty)
1863                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1864                 free_page(page);
1865                 goto errout;
1866         }
1867
1868         if (info->xmit_buf)
1869                 free_page(page);
1870         else
1871                 info->xmit_buf = (unsigned char *)page;
1872
1873         spin_unlock_irqrestore(&card->card_lock, flags);
1874
1875         set_line_char(info);
1876
1877         if (!IS_CYC_Z(*card)) {
1878                 chip = channel >> 2;
1879                 channel &= 0x03;
1880                 index = card->bus_index;
1881                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1882
1883 #ifdef CY_DEBUG_OPEN
1884                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1885                                 "base_addr %p\n",
1886                                 card, chip, channel, base_addr);
1887 #endif
1888                 spin_lock_irqsave(&card->card_lock, flags);
1889
1890                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1891
1892                 cy_writeb(base_addr + (CyRTPR << index),
1893                         (info->default_timeout ? info->default_timeout : 0x02));
1894                 /* 10ms rx timeout */
1895
1896                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1897                                 index);
1898
1899                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1900                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1901                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1902
1903 #ifdef CY_DEBUG_DTR
1904                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1905                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
1906                         readb(base_addr + (CyMSVR1 << index)),
1907                         readb(base_addr + (CyMSVR2 << index)));
1908 #endif
1909
1910                 cy_writeb(base_addr + (CySRER << index),
1911                         readb(base_addr + (CySRER << index)) | CyRxData);
1912                 info->flags |= ASYNC_INITIALIZED;
1913
1914                 if (info->tty)
1915                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
1916                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1917                 info->breakon = info->breakoff = 0;
1918                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1919                 info->idle_stats.in_use =
1920                 info->idle_stats.recv_idle =
1921                 info->idle_stats.xmit_idle = jiffies;
1922
1923                 spin_unlock_irqrestore(&card->card_lock, flags);
1924
1925         } else {
1926                 struct FIRM_ID __iomem *firm_id;
1927                 struct ZFW_CTRL __iomem *zfw_ctrl;
1928                 struct BOARD_CTRL __iomem *board_ctrl;
1929                 struct CH_CTRL __iomem *ch_ctrl;
1930
1931                 base_addr = card->base_addr;
1932
1933                 firm_id = base_addr + ID_ADDRESS;
1934                 if (!ISZLOADED(*card))
1935                         return -ENODEV;
1936
1937                 zfw_ctrl = card->base_addr +
1938                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1939                 board_ctrl = &zfw_ctrl->board_ctrl;
1940                 ch_ctrl = zfw_ctrl->ch_ctrl;
1941
1942 #ifdef CY_DEBUG_OPEN
1943                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1944                         "base_addr %p\n", card, channel, base_addr);
1945 #endif
1946                 spin_lock_irqsave(&card->card_lock, flags);
1947
1948                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1949 #ifdef Z_WAKE
1950 #ifdef CONFIG_CYZ_INTR
1951                 cy_writel(&ch_ctrl[channel].intr_enable,
1952                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1953                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1954 #else
1955                 cy_writel(&ch_ctrl[channel].intr_enable,
1956                           C_IN_IOCTLW | C_IN_MDCD);
1957 #endif                          /* CONFIG_CYZ_INTR */
1958 #else
1959 #ifdef CONFIG_CYZ_INTR
1960                 cy_writel(&ch_ctrl[channel].intr_enable,
1961                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1962                           C_IN_RXNNDT | C_IN_MDCD);
1963 #else
1964                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1965 #endif                          /* CONFIG_CYZ_INTR */
1966 #endif                          /* Z_WAKE */
1967
1968                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1969                 if (retval != 0) {
1970                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1971                                 "%x\n", info->line, retval);
1972                 }
1973
1974                 /* Flush RX buffers before raising DTR and RTS */
1975                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1976                 if (retval != 0) {
1977                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1978                                 "%x\n", info->line, retval);
1979                 }
1980
1981                 /* set timeout !!! */
1982                 /* set RTS and DTR !!! */
1983                 cy_writel(&ch_ctrl[channel].rs_control,
1984                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
1985                         C_RS_DTR);
1986                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1987                 if (retval != 0) {
1988                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1989                                 "%x\n", info->line, retval);
1990                 }
1991 #ifdef CY_DEBUG_DTR
1992                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1993 #endif
1994
1995                 /* enable send, recv, modem !!! */
1996
1997                 info->flags |= ASYNC_INITIALIZED;
1998                 if (info->tty)
1999                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2000                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2001                 info->breakon = info->breakoff = 0;
2002                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2003                 info->idle_stats.in_use =
2004                 info->idle_stats.recv_idle =
2005                 info->idle_stats.xmit_idle = jiffies;
2006
2007                 spin_unlock_irqrestore(&card->card_lock, flags);
2008         }
2009
2010 #ifdef CY_DEBUG_OPEN
2011         printk(KERN_DEBUG "cyc startup done\n");
2012 #endif
2013         return 0;
2014
2015 errout:
2016         spin_unlock_irqrestore(&card->card_lock, flags);
2017         return retval;
2018 }                               /* startup */
2019
2020 static void start_xmit(struct cyclades_port *info)
2021 {
2022         struct cyclades_card *card;
2023         unsigned long flags;
2024         void __iomem *base_addr;
2025         int chip, channel, index;
2026
2027         card = info->card;
2028         channel = info->line - card->first_line;
2029         if (!IS_CYC_Z(*card)) {
2030                 chip = channel >> 2;
2031                 channel &= 0x03;
2032                 index = card->bus_index;
2033                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2034
2035                 spin_lock_irqsave(&card->card_lock, flags);
2036                 cy_writeb(base_addr + (CyCAR << index), channel);
2037                 cy_writeb(base_addr + (CySRER << index),
2038                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2039                 spin_unlock_irqrestore(&card->card_lock, flags);
2040         } else {
2041 #ifdef CONFIG_CYZ_INTR
2042                 int retval;
2043
2044                 spin_lock_irqsave(&card->card_lock, flags);
2045                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2046                 if (retval != 0) {
2047                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2048                                 "%x\n", info->line, retval);
2049                 }
2050                 spin_unlock_irqrestore(&card->card_lock, flags);
2051 #else                           /* CONFIG_CYZ_INTR */
2052                 /* Don't have to do anything at this time */
2053 #endif                          /* CONFIG_CYZ_INTR */
2054         }
2055 }                               /* start_xmit */
2056
2057 /*
2058  * This routine shuts down a serial port; interrupts are disabled,
2059  * and DTR is dropped if the hangup on close termio flag is on.
2060  */
2061 static void shutdown(struct cyclades_port *info)
2062 {
2063         struct cyclades_card *card;
2064         unsigned long flags;
2065         void __iomem *base_addr;
2066         int chip, channel, index;
2067
2068         if (!(info->flags & ASYNC_INITIALIZED))
2069                 return;
2070
2071         card = info->card;
2072         channel = info->line - card->first_line;
2073         if (!IS_CYC_Z(*card)) {
2074                 chip = channel >> 2;
2075                 channel &= 0x03;
2076                 index = card->bus_index;
2077                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2078
2079 #ifdef CY_DEBUG_OPEN
2080                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2081                                 "channel %d, base_addr %p\n",
2082                                 card, chip, channel, base_addr);
2083 #endif
2084
2085                 spin_lock_irqsave(&card->card_lock, flags);
2086
2087                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2088                 wake_up_interruptible(&info->delta_msr_wait);
2089
2090                 if (info->xmit_buf) {
2091                         unsigned char *temp;
2092                         temp = info->xmit_buf;
2093                         info->xmit_buf = NULL;
2094                         free_page((unsigned long)temp);
2095                 }
2096                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2097                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2098                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2099                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2100 #ifdef CY_DEBUG_DTR
2101                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2102                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2103                                 readb(base_addr + (CyMSVR1 << index)),
2104                                 readb(base_addr + (CyMSVR2 << index)));
2105 #endif
2106                 }
2107                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2108                 /* it may be appropriate to clear _XMIT at
2109                    some later date (after testing)!!! */
2110
2111                 if (info->tty)
2112                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2113                 info->flags &= ~ASYNC_INITIALIZED;
2114                 spin_unlock_irqrestore(&card->card_lock, flags);
2115         } else {
2116                 struct FIRM_ID __iomem *firm_id;
2117                 struct ZFW_CTRL __iomem *zfw_ctrl;
2118                 struct BOARD_CTRL __iomem *board_ctrl;
2119                 struct CH_CTRL __iomem *ch_ctrl;
2120                 int retval;
2121
2122                 base_addr = card->base_addr;
2123 #ifdef CY_DEBUG_OPEN
2124                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2125                         "base_addr %p\n", card, channel, base_addr);
2126 #endif
2127
2128                 firm_id = base_addr + ID_ADDRESS;
2129                 if (!ISZLOADED(*card))
2130                         return;
2131
2132                 zfw_ctrl = card->base_addr +
2133                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2134                 board_ctrl = &zfw_ctrl->board_ctrl;
2135                 ch_ctrl = zfw_ctrl->ch_ctrl;
2136
2137                 spin_lock_irqsave(&card->card_lock, flags);
2138
2139                 if (info->xmit_buf) {
2140                         unsigned char *temp;
2141                         temp = info->xmit_buf;
2142                         info->xmit_buf = NULL;
2143                         free_page((unsigned long)temp);
2144                 }
2145
2146                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2147                         cy_writel(&ch_ctrl[channel].rs_control,
2148                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2149                                         ~(C_RS_RTS | C_RS_DTR)));
2150                         retval = cyz_issue_cmd(info->card, channel,
2151                                         C_CM_IOCTLM, 0L);
2152                         if (retval != 0) {
2153                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2154                                         "was %x\n", info->line, retval);
2155                         }
2156 #ifdef CY_DEBUG_DTR
2157                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2158 #endif
2159                 }
2160
2161                 if (info->tty)
2162                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2163                 info->flags &= ~ASYNC_INITIALIZED;
2164
2165                 spin_unlock_irqrestore(&card->card_lock, flags);
2166         }
2167
2168 #ifdef CY_DEBUG_OPEN
2169         printk(KERN_DEBUG "cyc shutdown done\n");
2170 #endif
2171 }                               /* shutdown */
2172
2173 /*
2174  * ------------------------------------------------------------
2175  * cy_open() and friends
2176  * ------------------------------------------------------------
2177  */
2178
2179 static int
2180 block_til_ready(struct tty_struct *tty, struct file *filp,
2181                 struct cyclades_port *info)
2182 {
2183         DECLARE_WAITQUEUE(wait, current);
2184         struct cyclades_card *cinfo;
2185         unsigned long flags;
2186         int chip, channel, index;
2187         int retval;
2188         void __iomem *base_addr;
2189
2190         cinfo = info->card;
2191         channel = info->line - cinfo->first_line;
2192
2193         /*
2194          * If the device is in the middle of being closed, then block
2195          * until it's done, and then try again.
2196          */
2197         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2198                 wait_event_interruptible(info->close_wait,
2199                                 !(info->flags & ASYNC_CLOSING));
2200                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2201         }
2202
2203         /*
2204          * If non-blocking mode is set, then make the check up front
2205          * and then exit.
2206          */
2207         if ((filp->f_flags & O_NONBLOCK) ||
2208                                         (tty->flags & (1 << TTY_IO_ERROR))) {
2209                 info->flags |= ASYNC_NORMAL_ACTIVE;
2210                 return 0;
2211         }
2212
2213         /*
2214          * Block waiting for the carrier detect and the line to become
2215          * free (i.e., not in use by the callout).  While we are in
2216          * this loop, info->count is dropped by one, so that
2217          * cy_close() knows when to free things.  We restore it upon
2218          * exit, either normal or abnormal.
2219          */
2220         retval = 0;
2221         add_wait_queue(&info->open_wait, &wait);
2222 #ifdef CY_DEBUG_OPEN
2223         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2224                 "count = %d\n", info->line, info->count);
2225 #endif
2226         spin_lock_irqsave(&cinfo->card_lock, flags);
2227         if (!tty_hung_up_p(filp))
2228                 info->count--;
2229         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2230 #ifdef CY_DEBUG_COUNT
2231         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2232                 "%d\n", current->pid, info->count);
2233 #endif
2234         info->blocked_open++;
2235
2236         if (!IS_CYC_Z(*cinfo)) {
2237                 chip = channel >> 2;
2238                 channel &= 0x03;
2239                 index = cinfo->bus_index;
2240                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2241
2242                 while (1) {
2243                         spin_lock_irqsave(&cinfo->card_lock, flags);
2244                         if ((tty->termios->c_cflag & CBAUD)) {
2245                                 cy_writeb(base_addr + (CyCAR << index),
2246                                           (u_char) channel);
2247                                 cy_writeb(base_addr + (CyMSVR1 << index),
2248                                           CyRTS);
2249                                 cy_writeb(base_addr + (CyMSVR2 << index),
2250                                           CyDTR);
2251 #ifdef CY_DEBUG_DTR
2252                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2253                                         "DTR\n");
2254                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2255                                         readb(base_addr + (CyMSVR1 << index)),
2256                                         readb(base_addr + (CyMSVR2 << index)));
2257 #endif
2258                         }
2259                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2260
2261                         set_current_state(TASK_INTERRUPTIBLE);
2262                         if (tty_hung_up_p(filp) ||
2263                                         !(info->flags & ASYNC_INITIALIZED)) {
2264                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2265                                           -EAGAIN : -ERESTARTSYS);
2266                                 break;
2267                         }
2268
2269                         spin_lock_irqsave(&cinfo->card_lock, flags);
2270                         cy_writeb(base_addr + (CyCAR << index),
2271                                   (u_char) channel);
2272                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2273                                         (readb(base_addr +
2274                                                 (CyMSVR1 << index)) & CyDCD))) {
2275                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2276                                 break;
2277                         }
2278                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2279
2280                         if (signal_pending(current)) {
2281                                 retval = -ERESTARTSYS;
2282                                 break;
2283                         }
2284 #ifdef CY_DEBUG_OPEN
2285                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2286                                 "ttyC%d, count = %d\n",
2287                                 info->line, info->count);
2288 #endif
2289                         schedule();
2290                 }
2291         } else {
2292                 struct FIRM_ID __iomem *firm_id;
2293                 struct ZFW_CTRL __iomem *zfw_ctrl;
2294                 struct BOARD_CTRL __iomem *board_ctrl;
2295                 struct CH_CTRL __iomem *ch_ctrl;
2296
2297                 base_addr = cinfo->base_addr;
2298                 firm_id = base_addr + ID_ADDRESS;
2299                 if (!ISZLOADED(*cinfo)) {
2300                         __set_current_state(TASK_RUNNING);
2301                         remove_wait_queue(&info->open_wait, &wait);
2302                         return -EINVAL;
2303                 }
2304
2305                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2306                                                                 & 0xfffff);
2307                 board_ctrl = &zfw_ctrl->board_ctrl;
2308                 ch_ctrl = zfw_ctrl->ch_ctrl;
2309
2310                 while (1) {
2311                         if ((tty->termios->c_cflag & CBAUD)) {
2312                                 cy_writel(&ch_ctrl[channel].rs_control,
2313                                         readl(&ch_ctrl[channel].rs_control) |
2314                                         C_RS_RTS | C_RS_DTR);
2315                                 retval = cyz_issue_cmd(cinfo,
2316                                         channel, C_CM_IOCTLM, 0L);
2317                                 if (retval != 0) {
2318                                         printk(KERN_ERR "cyc:block_til_ready "
2319                                                 "retval on ttyC%d was %x\n",
2320                                                 info->line, retval);
2321                                 }
2322 #ifdef CY_DEBUG_DTR
2323                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2324                                         "Z DTR\n");
2325 #endif
2326                         }
2327
2328                         set_current_state(TASK_INTERRUPTIBLE);
2329                         if (tty_hung_up_p(filp) ||
2330                                         !(info->flags & ASYNC_INITIALIZED)) {
2331                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2332                                           -EAGAIN : -ERESTARTSYS);
2333                                 break;
2334                         }
2335                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2336                                         (readl(&ch_ctrl[channel].rs_status) &
2337                                                 C_RS_DCD))) {
2338                                 break;
2339                         }
2340                         if (signal_pending(current)) {
2341                                 retval = -ERESTARTSYS;
2342                                 break;
2343                         }
2344 #ifdef CY_DEBUG_OPEN
2345                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2346                                 "ttyC%d, count = %d\n",
2347                                 info->line, info->count);
2348 #endif
2349                         schedule();
2350                 }
2351         }
2352         __set_current_state(TASK_RUNNING);
2353         remove_wait_queue(&info->open_wait, &wait);
2354         if (!tty_hung_up_p(filp)) {
2355                 info->count++;
2356 #ifdef CY_DEBUG_COUNT
2357                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2358                         "count to %d\n", current->pid, info->count);
2359 #endif
2360         }
2361         info->blocked_open--;
2362 #ifdef CY_DEBUG_OPEN
2363         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2364                 "count = %d\n", info->line, info->count);
2365 #endif
2366         if (retval)
2367                 return retval;
2368         info->flags |= ASYNC_NORMAL_ACTIVE;
2369         return 0;
2370 }                               /* block_til_ready */
2371
2372 /*
2373  * This routine is called whenever a serial port is opened.  It
2374  * performs the serial-specific initialization for the tty structure.
2375  */
2376 static int cy_open(struct tty_struct *tty, struct file *filp)
2377 {
2378         struct cyclades_port *info;
2379         unsigned int i, line;
2380         int retval;
2381
2382         line = tty->index;
2383         if (tty->index < 0 || NR_PORTS <= line)
2384                 return -ENODEV;
2385
2386         for (i = 0; i < NR_CARDS; i++)
2387                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2388                                 line >= cy_card[i].first_line)
2389                         break;
2390         if (i >= NR_CARDS)
2391                 return -ENODEV;
2392         info = &cy_card[i].ports[line - cy_card[i].first_line];
2393         if (info->line < 0)
2394                 return -ENODEV;
2395
2396         /* If the card's firmware hasn't been loaded,
2397            treat it as absent from the system.  This
2398            will make the user pay attention.
2399          */
2400         if (IS_CYC_Z(*info->card)) {
2401                 struct cyclades_card *cinfo = info->card;
2402                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2403
2404                 if (!ISZLOADED(*cinfo)) {
2405                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2406                                          (cinfo->ctl_addr))->mail_box_0)) &&
2407                                         Z_FPGA_CHECK(*cinfo)) &&
2408                                         (ZFIRM_HLT == readl(
2409                                                 &firm_id->signature))) {
2410                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2411                                         "need an external power supply for "
2412                                         "this number of ports.\nFirmware "
2413                                         "halted.\n");
2414                         } else {
2415                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2416                                         "yet loaded\n");
2417                         }
2418                         return -ENODEV;
2419                 }
2420 #ifdef CONFIG_CYZ_INTR
2421                 else {
2422                 /* In case this Z board is operating in interrupt mode, its
2423                    interrupts should be enabled as soon as the first open
2424                    happens to one of its ports. */
2425                         if (!cinfo->intr_enabled) {
2426                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2427                                 struct BOARD_CTRL __iomem *board_ctrl;
2428
2429                                 zfw_ctrl = cinfo->base_addr +
2430                                         (readl(&firm_id->zfwctrl_addr) &
2431                                          0xfffff);
2432
2433                                 board_ctrl = &zfw_ctrl->board_ctrl;
2434
2435                                 /* Enable interrupts on the PLX chip */
2436                                 cy_writew(cinfo->ctl_addr + 0x68,
2437                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2438                                 /* Enable interrupts on the FW */
2439                                 retval = cyz_issue_cmd(cinfo, 0,
2440                                                 C_CM_IRQ_ENBL, 0L);
2441                                 if (retval != 0) {
2442                                         printk(KERN_ERR "cyc:IRQ enable retval "
2443                                                 "was %x\n", retval);
2444                                 }
2445                                 cinfo->nports =
2446                                         (int)readl(&board_ctrl->n_channel);
2447                                 cinfo->intr_enabled = 1;
2448                         }
2449                 }
2450 #endif                          /* CONFIG_CYZ_INTR */
2451                 /* Make sure this Z port really exists in hardware */
2452                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2453                         return -ENODEV;
2454         }
2455 #ifdef CY_DEBUG_OTHER
2456         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2457 #endif
2458         tty->driver_data = info;
2459         info->tty = tty;
2460         if (serial_paranoia_check(info, tty->name, "cy_open"))
2461                 return -ENODEV;
2462
2463 #ifdef CY_DEBUG_OPEN
2464         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2465                         info->count);
2466 #endif
2467         info->count++;
2468 #ifdef CY_DEBUG_COUNT
2469         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2470                 current->pid, info->count);
2471 #endif
2472
2473         /*
2474          * If the port is the middle of closing, bail out now
2475          */
2476         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2477                 wait_event_interruptible(info->close_wait,
2478                                 !(info->flags & ASYNC_CLOSING));
2479                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2480         }
2481
2482         /*
2483          * Start up serial port
2484          */
2485         retval = startup(info);
2486         if (retval)
2487                 return retval;
2488
2489         retval = block_til_ready(tty, filp, info);
2490         if (retval) {
2491 #ifdef CY_DEBUG_OPEN
2492                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2493                         "with %d\n", retval);
2494 #endif
2495                 return retval;
2496         }
2497
2498         info->throttle = 0;
2499
2500 #ifdef CY_DEBUG_OPEN
2501         printk(KERN_DEBUG "cyc:cy_open done\n");
2502 #endif
2503         return 0;
2504 }                               /* cy_open */
2505
2506 /*
2507  * cy_wait_until_sent() --- wait until the transmitter is empty
2508  */
2509 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2510 {
2511         struct cyclades_card *card;
2512         struct cyclades_port *info = tty->driver_data;
2513         void __iomem *base_addr;
2514         int chip, channel, index;
2515         unsigned long orig_jiffies;
2516         int char_time;
2517
2518         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2519                 return;
2520
2521         if (info->xmit_fifo_size == 0)
2522                 return;         /* Just in case.... */
2523
2524         orig_jiffies = jiffies;
2525         /*
2526          * Set the check interval to be 1/5 of the estimated time to
2527          * send a single character, and make it at least 1.  The check
2528          * interval should also be less than the timeout.
2529          *
2530          * Note: we have to use pretty tight timings here to satisfy
2531          * the NIST-PCTS.
2532          */
2533         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2534         char_time = char_time / 5;
2535         if (char_time <= 0)
2536                 char_time = 1;
2537         if (timeout < 0)
2538                 timeout = 0;
2539         if (timeout)
2540                 char_time = min(char_time, timeout);
2541         /*
2542          * If the transmitter hasn't cleared in twice the approximate
2543          * amount of time to send the entire FIFO, it probably won't
2544          * ever clear.  This assumes the UART isn't doing flow
2545          * control, which is currently the case.  Hence, if it ever
2546          * takes longer than info->timeout, this is probably due to a
2547          * UART bug of some kind.  So, we clamp the timeout parameter at
2548          * 2*info->timeout.
2549          */
2550         if (!timeout || timeout > 2 * info->timeout)
2551                 timeout = 2 * info->timeout;
2552 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2553         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2554                 timeout, char_time, jiffies);
2555 #endif
2556         card = info->card;
2557         channel = (info->line) - (card->first_line);
2558         if (!IS_CYC_Z(*card)) {
2559                 chip = channel >> 2;
2560                 channel &= 0x03;
2561                 index = card->bus_index;
2562                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2563                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2564 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2565                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2566 #endif
2567                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2568                                 break;
2569                         if (timeout && time_after(jiffies, orig_jiffies +
2570                                         timeout))
2571                                 break;
2572                 }
2573         }
2574         /* Run one more char cycle */
2575         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2576 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2577         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2578 #endif
2579 }
2580
2581 /*
2582  * This routine is called when a particular tty device is closed.
2583  */
2584 static void cy_close(struct tty_struct *tty, struct file *filp)
2585 {
2586         struct cyclades_port *info = tty->driver_data;
2587         struct cyclades_card *card;
2588         unsigned long flags;
2589
2590 #ifdef CY_DEBUG_OTHER
2591         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2592 #endif
2593
2594         if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
2595                 return;
2596
2597         card = info->card;
2598
2599         spin_lock_irqsave(&card->card_lock, flags);
2600         /* If the TTY is being hung up, nothing to do */
2601         if (tty_hung_up_p(filp)) {
2602                 spin_unlock_irqrestore(&card->card_lock, flags);
2603                 return;
2604         }
2605 #ifdef CY_DEBUG_OPEN
2606         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2607                 info->count);
2608 #endif
2609         if ((tty->count == 1) && (info->count != 1)) {
2610                 /*
2611                  * Uh, oh.  tty->count is 1, which means that the tty
2612                  * structure will be freed.  Info->count should always
2613                  * be one in these conditions.  If it's greater than
2614                  * one, we've got real problems, since it means the
2615                  * serial port won't be shutdown.
2616                  */
2617                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2618                         "tty->count is 1, info->count is %d\n", info->count);
2619                 info->count = 1;
2620         }
2621 #ifdef CY_DEBUG_COUNT
2622         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2623                 current->pid, info->count - 1);
2624 #endif
2625         if (--info->count < 0) {
2626 #ifdef CY_DEBUG_COUNT
2627                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2628 #endif
2629                 info->count = 0;
2630         }
2631         if (info->count) {
2632                 spin_unlock_irqrestore(&card->card_lock, flags);
2633                 return;
2634         }
2635         info->flags |= ASYNC_CLOSING;
2636
2637         /*
2638          * Now we wait for the transmit buffer to clear; and we notify
2639          * the line discipline to only process XON/XOFF characters.
2640          */
2641         tty->closing = 1;
2642         spin_unlock_irqrestore(&card->card_lock, flags);
2643         if (info->closing_wait != CY_CLOSING_WAIT_NONE)
2644                 tty_wait_until_sent(tty, info->closing_wait);
2645
2646         spin_lock_irqsave(&card->card_lock, flags);
2647
2648         if (!IS_CYC_Z(*card)) {
2649                 int channel = info->line - card->first_line;
2650                 int index = card->bus_index;
2651                 void __iomem *base_addr = card->base_addr +
2652                         (cy_chip_offset[channel >> 2] << index);
2653                 /* Stop accepting input */
2654                 channel &= 0x03;
2655                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2656                 cy_writeb(base_addr + (CySRER << index),
2657                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2658                 if (info->flags & ASYNC_INITIALIZED) {
2659                         /* Waiting for on-board buffers to be empty before
2660                            closing the port */
2661                         spin_unlock_irqrestore(&card->card_lock, flags);
2662                         cy_wait_until_sent(tty, info->timeout);
2663                         spin_lock_irqsave(&card->card_lock, flags);
2664                 }
2665         } else {
2666 #ifdef Z_WAKE
2667                 /* Waiting for on-board buffers to be empty before closing
2668                    the port */
2669                 void __iomem *base_addr = card->base_addr;
2670                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2671                 struct ZFW_CTRL __iomem *zfw_ctrl =
2672                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2673                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2674                 int channel = info->line - card->first_line;
2675                 int retval;
2676
2677                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2678                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2679                         if (retval != 0) {
2680                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2681                                         "ttyC%d was %x\n", info->line, retval);
2682                         }
2683                         spin_unlock_irqrestore(&card->card_lock, flags);
2684                         wait_for_completion_interruptible(&info->shutdown_wait);
2685                         spin_lock_irqsave(&card->card_lock, flags);
2686                 }
2687 #endif
2688         }
2689
2690         spin_unlock_irqrestore(&card->card_lock, flags);
2691         shutdown(info);
2692         if (tty->driver->flush_buffer)
2693                 tty->driver->flush_buffer(tty);
2694         tty_ldisc_flush(tty);
2695         spin_lock_irqsave(&card->card_lock, flags);
2696
2697         tty->closing = 0;
2698         info->tty = NULL;
2699         if (info->blocked_open) {
2700                 spin_unlock_irqrestore(&card->card_lock, flags);
2701                 if (info->close_delay) {
2702                         msleep_interruptible(jiffies_to_msecs
2703                                                 (info->close_delay));
2704                 }
2705                 wake_up_interruptible(&info->open_wait);
2706                 spin_lock_irqsave(&card->card_lock, flags);
2707         }
2708         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2709         wake_up_interruptible(&info->close_wait);
2710
2711 #ifdef CY_DEBUG_OTHER
2712         printk(KERN_DEBUG "cyc:cy_close done\n");
2713 #endif
2714
2715         spin_unlock_irqrestore(&card->card_lock, flags);
2716 }                               /* cy_close */
2717
2718 /* This routine gets called when tty_write has put something into
2719  * the write_queue.  The characters may come from user space or
2720  * kernel space.
2721  *
2722  * This routine will return the number of characters actually
2723  * accepted for writing.
2724  *
2725  * If the port is not already transmitting stuff, start it off by
2726  * enabling interrupts.  The interrupt service routine will then
2727  * ensure that the characters are sent.
2728  * If the port is already active, there is no need to kick it.
2729  *
2730  */
2731 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2732 {
2733         struct cyclades_port *info = tty->driver_data;
2734         unsigned long flags;
2735         int c, ret = 0;
2736
2737 #ifdef CY_DEBUG_IO
2738         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2739 #endif
2740
2741         if (serial_paranoia_check(info, tty->name, "cy_write"))
2742                 return 0;
2743
2744         if (!info->xmit_buf)
2745                 return 0;
2746
2747         spin_lock_irqsave(&info->card->card_lock, flags);
2748         while (1) {
2749                 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2750                 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
2751
2752                 if (c <= 0)
2753                         break;
2754
2755                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2756                 info->xmit_head = (info->xmit_head + c) &
2757                         (SERIAL_XMIT_SIZE - 1);
2758                 info->xmit_cnt += c;
2759                 buf += c;
2760                 count -= c;
2761                 ret += c;
2762         }
2763         spin_unlock_irqrestore(&info->card->card_lock, flags);
2764
2765         info->idle_stats.xmit_bytes += ret;
2766         info->idle_stats.xmit_idle = jiffies;
2767
2768         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
2769                 start_xmit(info);
2770
2771         return ret;
2772 }                               /* cy_write */
2773
2774 /*
2775  * This routine is called by the kernel to write a single
2776  * character to the tty device.  If the kernel uses this routine,
2777  * it must call the flush_chars() routine (if defined) when it is
2778  * done stuffing characters into the driver.  If there is no room
2779  * in the queue, the character is ignored.
2780  */
2781 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2782 {
2783         struct cyclades_port *info = tty->driver_data;
2784         unsigned long flags;
2785
2786 #ifdef CY_DEBUG_IO
2787         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2788 #endif
2789
2790         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2791                 return;
2792
2793         if (!info->xmit_buf)
2794                 return;
2795
2796         spin_lock_irqsave(&info->card->card_lock, flags);
2797         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2798                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2799                 return;
2800         }
2801
2802         info->xmit_buf[info->xmit_head++] = ch;
2803         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2804         info->xmit_cnt++;
2805         info->idle_stats.xmit_bytes++;
2806         info->idle_stats.xmit_idle = jiffies;
2807         spin_unlock_irqrestore(&info->card->card_lock, flags);
2808 }                               /* cy_put_char */
2809
2810 /*
2811  * This routine is called by the kernel after it has written a
2812  * series of characters to the tty device using put_char().
2813  */
2814 static void cy_flush_chars(struct tty_struct *tty)
2815 {
2816         struct cyclades_port *info = tty->driver_data;
2817
2818 #ifdef CY_DEBUG_IO
2819         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2820 #endif
2821
2822         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2823                 return;
2824
2825         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2826                         !info->xmit_buf)
2827                 return;
2828
2829         start_xmit(info);
2830 }                               /* cy_flush_chars */
2831
2832 /*
2833  * This routine returns the numbers of characters the tty driver
2834  * will accept for queuing to be written.  This number is subject
2835  * to change as output buffers get emptied, or if the output flow
2836  * control is activated.
2837  */
2838 static int cy_write_room(struct tty_struct *tty)
2839 {
2840         struct cyclades_port *info = tty->driver_data;
2841         int ret;
2842
2843 #ifdef CY_DEBUG_IO
2844         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2845 #endif
2846
2847         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2848                 return 0;
2849         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2850         if (ret < 0)
2851                 ret = 0;
2852         return ret;
2853 }                               /* cy_write_room */
2854
2855 static int cy_chars_in_buffer(struct tty_struct *tty)
2856 {
2857         struct cyclades_card *card;
2858         struct cyclades_port *info = tty->driver_data;
2859         int channel;
2860
2861         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2862                 return 0;
2863
2864         card = info->card;
2865         channel = (info->line) - (card->first_line);
2866
2867 #ifdef Z_EXT_CHARS_IN_BUFFER
2868         if (!IS_CYC_Z(cy_card[card])) {
2869 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2870 #ifdef CY_DEBUG_IO
2871                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2872                         info->line, info->xmit_cnt);
2873 #endif
2874                 return info->xmit_cnt;
2875 #ifdef Z_EXT_CHARS_IN_BUFFER
2876         } else {
2877                 static struct FIRM_ID *firm_id;
2878                 static struct ZFW_CTRL *zfw_ctrl;
2879                 static struct CH_CTRL *ch_ctrl;
2880                 static struct BUF_CTRL *buf_ctrl;
2881                 int char_count;
2882                 __u32 tx_put, tx_get, tx_bufsize;
2883
2884                 firm_id = card->base_addr + ID_ADDRESS;
2885                 zfw_ctrl = card->base_addr +
2886                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2887                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2888                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2889
2890                 tx_get = readl(&buf_ctrl->tx_get);
2891                 tx_put = readl(&buf_ctrl->tx_put);
2892                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
2893                 if (tx_put >= tx_get)
2894                         char_count = tx_put - tx_get;
2895                 else
2896                         char_count = tx_put - tx_get + tx_bufsize;
2897 #ifdef CY_DEBUG_IO
2898                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2899                         info->line, info->xmit_cnt + char_count);
2900 #endif
2901                 return info->xmit_cnt + char_count;
2902         }
2903 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2904 }                               /* cy_chars_in_buffer */
2905
2906 /*
2907  * ------------------------------------------------------------
2908  * cy_ioctl() and friends
2909  * ------------------------------------------------------------
2910  */
2911
2912 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2913 {
2914         int co, co_val, bpr;
2915         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2916                         25000000);
2917
2918         if (baud == 0) {
2919                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2920                 return;
2921         }
2922
2923         /* determine which prescaler to use */
2924         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2925                 if (cy_clock / co_val / baud > 63)
2926                         break;
2927         }
2928
2929         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2930         if (bpr > 255)
2931                 bpr = 255;
2932
2933         info->tbpr = info->rbpr = bpr;
2934         info->tco = info->rco = co;
2935 }
2936
2937 /*
2938  * This routine finds or computes the various line characteristics.
2939  * It used to be called config_setup
2940  */
2941 static void set_line_char(struct cyclades_port *info)
2942 {
2943         struct cyclades_card *card;
2944         unsigned long flags;
2945         void __iomem *base_addr;
2946         int chip, channel, index;
2947         unsigned cflag, iflag;
2948         unsigned short chip_number;
2949         int baud, baud_rate = 0;
2950         int i;
2951
2952         if (!info->tty || !info->tty->termios)
2953                 return;
2954
2955         if (info->line == -1)
2956                 return;
2957
2958         cflag = info->tty->termios->c_cflag;
2959         iflag = info->tty->termios->c_iflag;
2960
2961         /*
2962          * Set up the tty->alt_speed kludge
2963          */
2964         if (info->tty) {
2965                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2966                         info->tty->alt_speed = 57600;
2967                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2968                         info->tty->alt_speed = 115200;
2969                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2970                         info->tty->alt_speed = 230400;
2971                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2972                         info->tty->alt_speed = 460800;
2973         }
2974
2975         card = info->card;
2976         channel = info->line - card->first_line;
2977         chip_number = channel / 4;
2978
2979         if (!IS_CYC_Z(*card)) {
2980
2981                 index = card->bus_index;
2982
2983                 /* baud rate */
2984                 baud = tty_get_baud_rate(info->tty);
2985                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
2986                                 ASYNC_SPD_CUST) {
2987                         if (info->custom_divisor)
2988                                 baud_rate = info->baud / info->custom_divisor;
2989                         else
2990                                 baud_rate = info->baud;
2991                 } else if (baud > CD1400_MAX_SPEED) {
2992                         baud = CD1400_MAX_SPEED;
2993                 }
2994                 /* find the baud index */
2995                 for (i = 0; i < 20; i++) {
2996                         if (baud == baud_table[i])
2997                                 break;
2998                 }
2999                 if (i == 20)
3000                         i = 19; /* CD1400_MAX_SPEED */
3001
3002                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3003                                 ASYNC_SPD_CUST) {
3004                         cyy_baud_calc(info, baud_rate);
3005                 } else {
3006                         if (info->chip_rev >= CD1400_REV_J) {
3007                                 /* It is a CD1400 rev. J or later */
3008                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3009                                 info->tco = baud_co_60[i];      /* Tx CO */
3010                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3011                                 info->rco = baud_co_60[i];      /* Rx CO */
3012                         } else {
3013                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3014                                 info->tco = baud_co_25[i];      /* Tx CO */
3015                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3016                                 info->rco = baud_co_25[i];      /* Rx CO */
3017                         }
3018                 }
3019                 if (baud_table[i] == 134) {
3020                         /* get it right for 134.5 baud */
3021                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3022                                         2;
3023                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3024                                 ASYNC_SPD_CUST) {
3025                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3026                                         baud_rate) + 2;
3027                 } else if (baud_table[i]) {
3028                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3029                                         baud_table[i]) + 2;
3030                         /* this needs to be propagated into the card info */
3031                 } else {
3032                         info->timeout = 0;
3033                 }
3034                 /* By tradition (is it a standard?) a baud rate of zero
3035                    implies the line should be/has been closed.  A bit
3036                    later in this routine such a test is performed. */
3037
3038                 /* byte size and parity */
3039                 info->cor5 = 0;
3040                 info->cor4 = 0;
3041                 /* receive threshold */
3042                 info->cor3 = (info->default_threshold ?
3043                                 info->default_threshold : baud_cor3[i]);
3044                 info->cor2 = CyETC;
3045                 switch (cflag & CSIZE) {
3046                 case CS5:
3047                         info->cor1 = Cy_5_BITS;
3048                         break;
3049                 case CS6:
3050                         info->cor1 = Cy_6_BITS;
3051                         break;
3052                 case CS7:
3053                         info->cor1 = Cy_7_BITS;
3054                         break;
3055                 case CS8:
3056                         info->cor1 = Cy_8_BITS;
3057                         break;
3058                 }
3059                 if (cflag & CSTOPB)
3060                         info->cor1 |= Cy_2_STOP;
3061
3062                 if (cflag & PARENB) {
3063                         if (cflag & PARODD)
3064                                 info->cor1 |= CyPARITY_O;
3065                         else
3066                                 info->cor1 |= CyPARITY_E;
3067                 } else
3068                         info->cor1 |= CyPARITY_NONE;
3069
3070                 /* CTS flow control flag */
3071                 if (cflag & CRTSCTS) {
3072                         info->flags |= ASYNC_CTS_FLOW;
3073                         info->cor2 |= CyCtsAE;
3074                 } else {
3075                         info->flags &= ~ASYNC_CTS_FLOW;
3076                         info->cor2 &= ~CyCtsAE;
3077                 }
3078                 if (cflag & CLOCAL)
3079                         info->flags &= ~ASYNC_CHECK_CD;
3080                 else
3081                         info->flags |= ASYNC_CHECK_CD;
3082
3083          /***********************************************
3084             The hardware option, CyRtsAO, presents RTS when
3085             the chip has characters to send.  Since most modems
3086             use RTS as reverse (inbound) flow control, this
3087             option is not used.  If inbound flow control is
3088             necessary, DTR can be programmed to provide the
3089             appropriate signals for use with a non-standard
3090             cable.  Contact Marcio Saito for details.
3091          ***********************************************/
3092
3093                 chip = channel >> 2;
3094                 channel &= 0x03;
3095                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3096
3097                 spin_lock_irqsave(&card->card_lock, flags);
3098                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3099
3100                 /* tx and rx baud rate */
3101
3102                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3103                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3104                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3105                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3106
3107                 /* set line characteristics  according configuration */
3108
3109                 cy_writeb(base_addr + (CySCHR1 << index),
3110                           START_CHAR(info->tty));
3111                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3112                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3113                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3114                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3115                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3116                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3117
3118                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3119                                 CyCOR3ch, index);
3120
3121                 /* !!! Is this needed? */
3122                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3123                 cy_writeb(base_addr + (CyRTPR << index),
3124                         (info->default_timeout ? info->default_timeout : 0x02));
3125                 /* 10ms rx timeout */
3126
3127                 if (C_CLOCAL(info->tty)) {
3128                         /* without modem intr */
3129                         cy_writeb(base_addr + (CySRER << index),
3130                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3131                         /* act on 1->0 modem transitions */
3132                         if ((cflag & CRTSCTS) && info->rflow) {
3133                                 cy_writeb(base_addr + (CyMCOR1 << index),
3134                                           (CyCTS | rflow_thr[i]));
3135                         } else {
3136                                 cy_writeb(base_addr + (CyMCOR1 << index),
3137                                           CyCTS);
3138                         }
3139                         /* act on 0->1 modem transitions */
3140                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3141                 } else {
3142                         /* without modem intr */
3143                         cy_writeb(base_addr + (CySRER << index),
3144                                   readb(base_addr +
3145                                            (CySRER << index)) | CyMdmCh);
3146                         /* act on 1->0 modem transitions */
3147                         if ((cflag & CRTSCTS) && info->rflow) {
3148                                 cy_writeb(base_addr + (CyMCOR1 << index),
3149                                           (CyDSR | CyCTS | CyRI | CyDCD |
3150                                            rflow_thr[i]));
3151                         } else {
3152                                 cy_writeb(base_addr + (CyMCOR1 << index),
3153                                           CyDSR | CyCTS | CyRI | CyDCD);
3154                         }
3155                         /* act on 0->1 modem transitions */
3156                         cy_writeb(base_addr + (CyMCOR2 << index),
3157                                   CyDSR | CyCTS | CyRI | CyDCD);
3158                 }
3159
3160                 if (i == 0) {   /* baud rate is zero, turn off line */
3161                         if (info->rtsdtr_inv) {
3162                                 cy_writeb(base_addr + (CyMSVR1 << index),
3163                                           ~CyRTS);
3164                         } else {
3165                                 cy_writeb(base_addr + (CyMSVR2 << index),
3166                                           ~CyDTR);
3167                         }
3168 #ifdef CY_DEBUG_DTR
3169                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3170                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3171                                 readb(base_addr + (CyMSVR1 << index)),
3172                                 readb(base_addr + (CyMSVR2 << index)));
3173 #endif
3174                 } else {
3175                         if (info->rtsdtr_inv) {
3176                                 cy_writeb(base_addr + (CyMSVR1 << index),
3177                                           CyRTS);
3178                         } else {
3179                                 cy_writeb(base_addr + (CyMSVR2 << index),
3180                                           CyDTR);
3181                         }
3182 #ifdef CY_DEBUG_DTR
3183                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3184                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3185                                 readb(base_addr + (CyMSVR1 << index)),
3186                                 readb(base_addr + (CyMSVR2 << index)));
3187 #endif
3188                 }
3189
3190                 if (info->tty)
3191                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3192                 spin_unlock_irqrestore(&card->card_lock, flags);
3193
3194         } else {
3195                 struct FIRM_ID __iomem *firm_id;
3196                 struct ZFW_CTRL __iomem *zfw_ctrl;
3197                 struct BOARD_CTRL __iomem *board_ctrl;
3198                 struct CH_CTRL __iomem *ch_ctrl;
3199                 struct BUF_CTRL __iomem *buf_ctrl;
3200                 __u32 sw_flow;
3201                 int retval;
3202
3203                 firm_id = card->base_addr + ID_ADDRESS;
3204                 if (!ISZLOADED(*card))
3205                         return;
3206
3207                 zfw_ctrl = card->base_addr +
3208                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3209                 board_ctrl = &zfw_ctrl->board_ctrl;
3210                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3211                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3212
3213                 /* baud rate */
3214                 baud = tty_get_baud_rate(info->tty);
3215                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3216                                 ASYNC_SPD_CUST) {
3217                         if (info->custom_divisor)
3218                                 baud_rate = info->baud / info->custom_divisor;
3219                         else
3220                                 baud_rate = info->baud;
3221                 } else if (baud > CYZ_MAX_SPEED) {
3222                         baud = CYZ_MAX_SPEED;
3223                 }
3224                 cy_writel(&ch_ctrl->comm_baud, baud);
3225
3226                 if (baud == 134) {
3227                         /* get it right for 134.5 baud */
3228                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3229                                         2;
3230                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3231                                 ASYNC_SPD_CUST) {
3232                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3233                                         baud_rate) + 2;
3234                 } else if (baud) {
3235                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3236                                         baud) + 2;
3237                         /* this needs to be propagated into the card info */
3238                 } else {
3239                         info->timeout = 0;
3240                 }
3241
3242                 /* byte size and parity */
3243                 switch (cflag & CSIZE) {
3244                 case CS5:
3245                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3246                         break;
3247                 case CS6:
3248                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3249                         break;
3250                 case CS7:
3251                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3252                         break;
3253                 case CS8:
3254                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3255                         break;
3256                 }
3257                 if (cflag & CSTOPB) {
3258                         cy_writel(&ch_ctrl->comm_data_l,
3259                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3260                 } else {
3261                         cy_writel(&ch_ctrl->comm_data_l,
3262                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3263                 }
3264                 if (cflag & PARENB) {
3265                         if (cflag & PARODD)
3266                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3267                         else
3268                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3269                 } else
3270                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3271
3272                 /* CTS flow control flag */
3273                 if (cflag & CRTSCTS) {
3274                         cy_writel(&ch_ctrl->hw_flow,
3275                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3276                 } else {
3277                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3278                                         ~(C_RS_CTS | C_RS_RTS));
3279                 }
3280                 /* As the HW flow control is done in firmware, the driver
3281                    doesn't need to care about it */
3282                 info->flags &= ~ASYNC_CTS_FLOW;
3283
3284                 /* XON/XOFF/XANY flow control flags */
3285                 sw_flow = 0;
3286                 if (iflag & IXON) {
3287                         sw_flow |= C_FL_OXX;
3288                         if (iflag & IXANY)
3289                                 sw_flow |= C_FL_OIXANY;
3290                 }
3291                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3292
3293                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3294                 if (retval != 0) {
3295                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3296                                 "was %x\n", info->line, retval);
3297                 }
3298
3299                 /* CD sensitivity */
3300                 if (cflag & CLOCAL)
3301                         info->flags &= ~ASYNC_CHECK_CD;
3302                 else
3303                         info->flags |= ASYNC_CHECK_CD;
3304
3305                 if (baud == 0) {        /* baud rate is zero, turn off line */
3306                         cy_writel(&ch_ctrl->rs_control,
3307                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3308 #ifdef CY_DEBUG_DTR
3309                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3310 #endif
3311                 } else {
3312                         cy_writel(&ch_ctrl->rs_control,
3313                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3314 #ifdef CY_DEBUG_DTR
3315                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3316 #endif
3317                 }
3318
3319                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3320                 if (retval != 0) {
3321                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3322                                 "was %x\n", info->line, retval);
3323                 }
3324
3325                 if (info->tty)
3326                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3327         }
3328 }                               /* set_line_char */
3329
3330 static int
3331 get_serial_info(struct cyclades_port *info,
3332                 struct serial_struct __user *retinfo)
3333 {
3334         struct serial_struct tmp;
3335         struct cyclades_card *cinfo = info->card;
3336
3337         if (!retinfo)
3338                 return -EFAULT;
3339         memset(&tmp, 0, sizeof(tmp));
3340         tmp.type = info->type;
3341         tmp.line = info->line;
3342         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3343                 cinfo->first_line;
3344         tmp.irq = cinfo->irq;
3345         tmp.flags = info->flags;
3346         tmp.close_delay = info->close_delay;
3347         tmp.closing_wait = info->closing_wait;
3348         tmp.baud_base = info->baud;
3349         tmp.custom_divisor = info->custom_divisor;
3350         tmp.hub6 = 0;           /*!!! */
3351         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3352 }                               /* get_serial_info */
3353
3354 static int
3355 set_serial_info(struct cyclades_port *info,
3356                 struct serial_struct __user *new_info)
3357 {
3358         struct serial_struct new_serial;
3359         struct cyclades_port old_info;
3360
3361         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3362                 return -EFAULT;
3363         old_info = *info;
3364
3365         if (!capable(CAP_SYS_ADMIN)) {
3366                 if (new_serial.close_delay != info->close_delay ||
3367                                 new_serial.baud_base != info->baud ||
3368                                 (new_serial.flags & ASYNC_FLAGS &
3369                                         ~ASYNC_USR_MASK) !=
3370                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3371                         return -EPERM;
3372                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3373                                 (new_serial.flags & ASYNC_USR_MASK);
3374                 info->baud = new_serial.baud_base;
3375                 info->custom_divisor = new_serial.custom_divisor;
3376                 goto check_and_exit;
3377         }
3378
3379         /*
3380          * OK, past this point, all the error checking has been done.
3381          * At this point, we start making changes.....
3382          */
3383
3384         info->baud = new_serial.baud_base;
3385         info->custom_divisor = new_serial.custom_divisor;
3386         info->flags = (info->flags & ~ASYNC_FLAGS) |
3387                         (new_serial.flags & ASYNC_FLAGS);
3388         info->close_delay = new_serial.close_delay * HZ / 100;
3389         info->closing_wait = new_serial.closing_wait * HZ / 100;
3390
3391 check_and_exit:
3392         if (info->flags & ASYNC_INITIALIZED) {
3393                 set_line_char(info);
3394                 return 0;
3395         } else {
3396                 return startup(info);
3397         }
3398 }                               /* set_serial_info */
3399
3400 /*
3401  * get_lsr_info - get line status register info
3402  *
3403  * Purpose: Let user call ioctl() to get info when the UART physically
3404  *          is emptied.  On bus types like RS485, the transmitter must
3405  *          release the bus after transmitting. This must be done when
3406  *          the transmit shift register is empty, not be done when the
3407  *          transmit holding register is empty.  This functionality
3408  *          allows an RS485 driver to be written in user space.
3409  */
3410 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
3411 {
3412         struct cyclades_card *card;
3413         int chip, channel, index;
3414         unsigned char status;
3415         unsigned int result;
3416         unsigned long flags;
3417         void __iomem *base_addr;
3418
3419         card = info->card;
3420         channel = (info->line) - (card->first_line);
3421         if (!IS_CYC_Z(*card)) {
3422                 chip = channel >> 2;
3423                 channel &= 0x03;
3424                 index = card->bus_index;
3425                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3426
3427                 spin_lock_irqsave(&card->card_lock, flags);
3428                 status = readb(base_addr + (CySRER << index)) &
3429                                 (CyTxRdy | CyTxMpty);
3430                 spin_unlock_irqrestore(&card->card_lock, flags);
3431                 result = (status ? 0 : TIOCSER_TEMT);
3432         } else {
3433                 /* Not supported yet */
3434                 return -EINVAL;
3435         }
3436         return put_user(result, (unsigned long __user *)value);
3437 }
3438
3439 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3440 {
3441         struct cyclades_port *info = tty->driver_data;
3442         struct cyclades_card *card;
3443         int chip, channel, index;
3444         void __iomem *base_addr;
3445         unsigned long flags;
3446         unsigned char status;
3447         unsigned long lstatus;
3448         unsigned int result;
3449         struct FIRM_ID __iomem *firm_id;
3450         struct ZFW_CTRL __iomem *zfw_ctrl;
3451         struct BOARD_CTRL __iomem *board_ctrl;
3452         struct CH_CTRL __iomem *ch_ctrl;
3453
3454         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3455                 return -ENODEV;
3456
3457         lock_kernel();
3458
3459         card = info->card;
3460         channel = info->line - card->first_line;
3461         if (!IS_CYC_Z(*card)) {
3462                 chip = channel >> 2;
3463                 channel &= 0x03;
3464                 index = card->bus_index;
3465                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3466
3467                 spin_lock_irqsave(&card->card_lock, flags);
3468                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3469                 status = readb(base_addr + (CyMSVR1 << index));
3470                 status |= readb(base_addr + (CyMSVR2 << index));
3471                 spin_unlock_irqrestore(&card->card_lock, flags);
3472
3473                 if (info->rtsdtr_inv) {
3474                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3475                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3476                 } else {
3477                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3478                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3479                 }
3480                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3481                         ((status & CyRI) ? TIOCM_RNG : 0) |
3482                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3483                         ((status & CyCTS) ? TIOCM_CTS : 0);
3484         } else {
3485                 base_addr = card->base_addr;
3486                 firm_id = card->base_addr + ID_ADDRESS;
3487                 if (ISZLOADED(*card)) {
3488                         zfw_ctrl = card->base_addr +
3489                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3490                         board_ctrl = &zfw_ctrl->board_ctrl;
3491                         ch_ctrl = zfw_ctrl->ch_ctrl;
3492                         lstatus = readl(&ch_ctrl[channel].rs_status);
3493                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3494                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3495                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3496                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3497                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3498                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3499                 } else {
3500                         result = 0;
3501                         unlock_kernel();
3502                         return -ENODEV;
3503                 }
3504
3505         }
3506         unlock_kernel();
3507         return result;
3508 }                               /* cy_tiomget */
3509
3510 static int
3511 cy_tiocmset(struct tty_struct *tty, struct file *file,
3512                 unsigned int set, unsigned int clear)
3513 {
3514         struct cyclades_port *info = tty->driver_data;
3515         struct cyclades_card *card;
3516         int chip, channel, index;
3517         void __iomem *base_addr;
3518         unsigned long flags;
3519         struct FIRM_ID __iomem *firm_id;
3520         struct ZFW_CTRL __iomem *zfw_ctrl;
3521         struct BOARD_CTRL __iomem *board_ctrl;
3522         struct CH_CTRL __iomem *ch_ctrl;
3523         int retval;
3524
3525         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3526                 return -ENODEV;
3527
3528         card = info->card;
3529         channel = (info->line) - (card->first_line);
3530         if (!IS_CYC_Z(*card)) {
3531                 chip = channel >> 2;
3532                 channel &= 0x03;
3533                 index = card->bus_index;
3534                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3535
3536                 if (set & TIOCM_RTS) {
3537                         spin_lock_irqsave(&card->card_lock, flags);
3538                         cy_writeb(base_addr + (CyCAR << index),
3539                                   (u_char) channel);
3540                         if (info->rtsdtr_inv) {
3541                                 cy_writeb(base_addr + (CyMSVR2 << index),
3542                                           CyDTR);
3543                         } else {
3544                                 cy_writeb(base_addr + (CyMSVR1 << index),
3545                                           CyRTS);
3546                         }
3547                         spin_unlock_irqrestore(&card->card_lock, flags);
3548                 }
3549                 if (clear & TIOCM_RTS) {
3550                         spin_lock_irqsave(&card->card_lock, flags);
3551                         cy_writeb(base_addr + (CyCAR << index),
3552                                   (u_char) channel);
3553                         if (info->rtsdtr_inv) {
3554                                 cy_writeb(base_addr + (CyMSVR2 << index),
3555                                           ~CyDTR);
3556                         } else {
3557                                 cy_writeb(base_addr + (CyMSVR1 << index),
3558                                           ~CyRTS);
3559                         }
3560                         spin_unlock_irqrestore(&card->card_lock, flags);
3561                 }
3562                 if (set & TIOCM_DTR) {
3563                         spin_lock_irqsave(&card->card_lock, flags);
3564                         cy_writeb(base_addr + (CyCAR << index),
3565                                   (u_char) channel);
3566                         if (info->rtsdtr_inv) {
3567                                 cy_writeb(base_addr + (CyMSVR1 << index),
3568                                           CyRTS);
3569                         } else {
3570                                 cy_writeb(base_addr + (CyMSVR2 << index),
3571                                           CyDTR);
3572                         }
3573 #ifdef CY_DEBUG_DTR
3574                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3575                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3576                                 readb(base_addr + (CyMSVR1 << index)),
3577                                 readb(base_addr + (CyMSVR2 << index)));
3578 #endif
3579                         spin_unlock_irqrestore(&card->card_lock, flags);
3580                 }
3581                 if (clear & TIOCM_DTR) {
3582                         spin_lock_irqsave(&card->card_lock, flags);
3583                         cy_writeb(base_addr + (CyCAR << index),
3584                                   (u_char) channel);
3585                         if (info->rtsdtr_inv) {
3586                                 cy_writeb(base_addr + (CyMSVR1 << index),
3587                                           ~CyRTS);
3588                         } else {
3589                                 cy_writeb(base_addr + (CyMSVR2 << index),
3590                                           ~CyDTR);
3591                         }
3592
3593 #ifdef CY_DEBUG_DTR
3594                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3595                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3596                                 readb(base_addr + (CyMSVR1 << index)),
3597                                 readb(base_addr + (CyMSVR2 << index)));
3598 #endif
3599                         spin_unlock_irqrestore(&card->card_lock, flags);
3600                 }
3601         } else {
3602                 base_addr = card->base_addr;
3603
3604                 firm_id = card->base_addr + ID_ADDRESS;
3605                 if (ISZLOADED(*card)) {
3606                         zfw_ctrl = card->base_addr +
3607                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3608                         board_ctrl = &zfw_ctrl->board_ctrl;
3609                         ch_ctrl = zfw_ctrl->ch_ctrl;
3610
3611                         if (set & TIOCM_RTS) {
3612                                 spin_lock_irqsave(&card->card_lock, flags);
3613                                 cy_writel(&ch_ctrl[channel].rs_control,
3614                                         readl(&ch_ctrl[channel].rs_control) |
3615                                         C_RS_RTS);
3616                                 spin_unlock_irqrestore(&card->card_lock, flags);
3617                         }
3618                         if (clear & TIOCM_RTS) {
3619                                 spin_lock_irqsave(&card->card_lock, flags);
3620                                 cy_writel(&ch_ctrl[channel].rs_control,
3621                                         readl(&ch_ctrl[channel].rs_control) &
3622                                         ~C_RS_RTS);
3623                                 spin_unlock_irqrestore(&card->card_lock, flags);
3624                         }
3625                         if (set & TIOCM_DTR) {
3626                                 spin_lock_irqsave(&card->card_lock, flags);
3627                                 cy_writel(&ch_ctrl[channel].rs_control,
3628                                         readl(&ch_ctrl[channel].rs_control) |
3629                                         C_RS_DTR);
3630 #ifdef CY_DEBUG_DTR
3631                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3632                                         "Z DTR\n");
3633 #endif
3634                                 spin_unlock_irqrestore(&card->card_lock, flags);
3635                         }
3636                         if (clear & TIOCM_DTR) {
3637                                 spin_lock_irqsave(&card->card_lock, flags);
3638                                 cy_writel(&ch_ctrl[channel].rs_control,
3639                                         readl(&ch_ctrl[channel].rs_control) &
3640                                         ~C_RS_DTR);
3641 #ifdef CY_DEBUG_DTR
3642                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3643                                         "Z DTR\n");
3644 #endif
3645                                 spin_unlock_irqrestore(&card->card_lock, flags);
3646                         }
3647                 } else {
3648                         return -ENODEV;
3649                 }
3650                 spin_lock_irqsave(&card->card_lock, flags);
3651                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3652                 if (retval != 0) {
3653                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3654                                 "was %x\n", info->line, retval);
3655                 }
3656                 spin_unlock_irqrestore(&card->card_lock, flags);
3657         }
3658         return 0;
3659 }                               /* cy_tiocmset */
3660
3661 /*
3662  * cy_break() --- routine which turns the break handling on or off
3663  */
3664 static void cy_break(struct tty_struct *tty, int break_state)
3665 {
3666         struct cyclades_port *info = tty->driver_data;
3667         struct cyclades_card *card;
3668         unsigned long flags;
3669
3670         if (serial_paranoia_check(info, tty->name, "cy_break"))
3671                 return;
3672
3673         card = info->card;
3674
3675         spin_lock_irqsave(&card->card_lock, flags);
3676         if (!IS_CYC_Z(*card)) {
3677                 /* Let the transmit ISR take care of this (since it
3678                    requires stuffing characters into the output stream).
3679                  */
3680                 if (break_state == -1) {
3681                         if (!info->breakon) {
3682                                 info->breakon = 1;
3683                                 if (!info->xmit_cnt) {
3684                                         spin_unlock_irqrestore(&card->card_lock, flags);
3685                                         start_xmit(info);
3686                                         spin_lock_irqsave(&card->card_lock, flags);
3687                                 }
3688                         }
3689                 } else {
3690                         if (!info->breakoff) {
3691                                 info->breakoff = 1;
3692                                 if (!info->xmit_cnt) {
3693                                         spin_unlock_irqrestore(&card->card_lock, flags);
3694                                         start_xmit(info);
3695                                         spin_lock_irqsave(&card->card_lock, flags);
3696                                 }
3697                         }
3698                 }
3699         } else {
3700                 int retval;
3701
3702                 if (break_state == -1) {
3703                         retval = cyz_issue_cmd(card,
3704                                 info->line - card->first_line,
3705                                 C_CM_SET_BREAK, 0L);
3706                         if (retval != 0) {
3707                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3708                                         "ttyC%d was %x\n", info->line, retval);
3709                         }
3710                 } else {
3711                         retval = cyz_issue_cmd(card,
3712                                 info->line - card->first_line,
3713                                 C_CM_CLR_BREAK, 0L);
3714                         if (retval != 0) {
3715                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3716                                         "on ttyC%d was %x\n", info->line,
3717                                         retval);
3718                         }
3719                 }
3720         }
3721         spin_unlock_irqrestore(&card->card_lock, flags);
3722 }                               /* cy_break */
3723
3724 static int get_mon_info(struct cyclades_port *info,
3725                                 struct cyclades_monitor __user *mon)
3726 {
3727
3728         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3729                 return -EFAULT;
3730         info->mon.int_count = 0;
3731         info->mon.char_count = 0;
3732         info->mon.char_max = 0;
3733         info->mon.char_last = 0;
3734         return 0;
3735 }                               /* get_mon_info */
3736
3737 static int set_threshold(struct cyclades_port *info, unsigned long value)
3738 {
3739         struct cyclades_card *card;
3740         void __iomem *base_addr;
3741         int channel, chip, index;
3742         unsigned long flags;
3743
3744         card = info->card;
3745         channel = info->line - card->first_line;
3746         if (!IS_CYC_Z(*card)) {
3747                 chip = channel >> 2;
3748                 channel &= 0x03;
3749                 index = card->bus_index;
3750                 base_addr =
3751                     card->base_addr + (cy_chip_offset[chip] << index);
3752
3753                 info->cor3 &= ~CyREC_FIFO;
3754                 info->cor3 |= value & CyREC_FIFO;
3755
3756                 spin_lock_irqsave(&card->card_lock, flags);
3757                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3758                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3759                 spin_unlock_irqrestore(&card->card_lock, flags);
3760         }
3761         return 0;
3762 }                               /* set_threshold */
3763
3764 static int get_threshold(struct cyclades_port *info,
3765                                                 unsigned long __user *value)
3766 {
3767         struct cyclades_card *card;
3768         void __iomem *base_addr;
3769         int channel, chip, index;
3770         unsigned long tmp;
3771
3772         card = info->card;
3773         channel = info->line - card->first_line;
3774         if (!IS_CYC_Z(*card)) {
3775                 chip = channel >> 2;
3776                 channel &= 0x03;
3777                 index = card->bus_index;
3778                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3779
3780                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3781                 return put_user(tmp, value);
3782         }
3783         return 0;
3784 }                               /* get_threshold */
3785
3786 static int set_default_threshold(struct cyclades_port *info,
3787                                                         unsigned long value)
3788 {
3789         info->default_threshold = value & 0x0f;
3790         return 0;
3791 }                               /* set_default_threshold */
3792
3793 static int get_default_threshold(struct cyclades_port *info,
3794                                                 unsigned long __user *value)
3795 {
3796         return put_user(info->default_threshold, value);
3797 }                               /* get_default_threshold */
3798
3799 static int set_timeout(struct cyclades_port *info, unsigned long value)
3800 {
3801         struct cyclades_card *card;
3802         void __iomem *base_addr;
3803         int channel, chip, index;
3804         unsigned long flags;
3805
3806         card = info->card;
3807         channel = info->line - card->first_line;
3808         if (!IS_CYC_Z(*card)) {
3809                 chip = channel >> 2;
3810                 channel &= 0x03;
3811                 index = card->bus_index;
3812                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3813
3814                 spin_lock_irqsave(&card->card_lock, flags);
3815                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3816                 spin_unlock_irqrestore(&card->card_lock, flags);
3817         }
3818         return 0;
3819 }                               /* set_timeout */
3820
3821 static int get_timeout(struct cyclades_port *info,
3822                                                 unsigned long __user *value)
3823 {
3824         struct cyclades_card *card;
3825         void __iomem *base_addr;
3826         int channel, chip, index;
3827         unsigned long tmp;
3828
3829         card = info->card;
3830         channel = info->line - card->first_line;
3831         if (!IS_CYC_Z(*card)) {
3832                 chip = channel >> 2;
3833                 channel &= 0x03;
3834                 index = card->bus_index;
3835                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3836
3837                 tmp = readb(base_addr + (CyRTPR << index));
3838                 return put_user(tmp, value);
3839         }
3840         return 0;
3841 }                               /* get_timeout */
3842
3843 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3844 {
3845         info->default_timeout = value & 0xff;
3846         return 0;
3847 }                               /* set_default_timeout */
3848
3849 static int get_default_timeout(struct cyclades_port *info,
3850                                         unsigned long __user *value)
3851 {
3852         return put_user(info->default_timeout, value);
3853 }                               /* get_default_timeout */
3854
3855 /*
3856  * This routine allows the tty driver to implement device-
3857  * specific ioctl's.  If the ioctl number passed in cmd is
3858  * not recognized by the driver, it should return ENOIOCTLCMD.
3859  */
3860 static int
3861 cy_ioctl(struct tty_struct *tty, struct file *file,
3862          unsigned int cmd, unsigned long arg)
3863 {
3864         struct cyclades_port *info = tty->driver_data;
3865         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3866         struct serial_icounter_struct __user *p_cuser;  /* user space */
3867         int ret_val = 0;
3868         unsigned long flags;
3869         void __user *argp = (void __user *)arg;
3870
3871         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3872                 return -ENODEV;
3873
3874 #ifdef CY_DEBUG_OTHER
3875         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3876                 info->line, cmd, arg);
3877 #endif
3878         lock_kernel();
3879
3880         switch (cmd) {
3881         case CYGETMON:
3882                 ret_val = get_mon_info(info, argp);
3883                 break;
3884         case CYGETTHRESH:
3885                 ret_val = get_threshold(info, argp);
3886                 break;
3887         case CYSETTHRESH:
3888                 ret_val = set_threshold(info, arg);
3889                 break;
3890         case CYGETDEFTHRESH:
3891                 ret_val = get_default_threshold(info, argp);
3892                 break;
3893         case CYSETDEFTHRESH:
3894                 ret_val = set_default_threshold(info, arg);
3895                 break;
3896         case CYGETTIMEOUT:
3897                 ret_val = get_timeout(info, argp);
3898                 break;
3899         case CYSETTIMEOUT:
3900                 ret_val = set_timeout(info, arg);
3901                 break;
3902         case CYGETDEFTIMEOUT:
3903                 ret_val = get_default_timeout(info, argp);
3904                 break;
3905         case CYSETDEFTIMEOUT:
3906                 ret_val = set_default_timeout(info, arg);
3907                 break;
3908         case CYSETRFLOW:
3909                 info->rflow = (int)arg;
3910                 ret_val = 0;
3911                 break;
3912         case CYGETRFLOW:
3913                 ret_val = info->rflow;
3914                 break;
3915         case CYSETRTSDTR_INV:
3916                 info->rtsdtr_inv = (int)arg;
3917                 ret_val = 0;
3918                 break;
3919         case CYGETRTSDTR_INV:
3920                 ret_val = info->rtsdtr_inv;
3921                 break;
3922         case CYGETCD1400VER:
3923                 ret_val = info->chip_rev;
3924                 break;
3925 #ifndef CONFIG_CYZ_INTR
3926         case CYZSETPOLLCYCLE:
3927                 cyz_polling_cycle = (arg * HZ) / 1000;
3928                 ret_val = 0;
3929                 break;
3930         case CYZGETPOLLCYCLE:
3931                 ret_val = (cyz_polling_cycle * 1000) / HZ;
3932                 break;
3933 #endif                          /* CONFIG_CYZ_INTR */
3934         case CYSETWAIT:
3935                 info->closing_wait = (unsigned short)arg * HZ / 100;
3936                 ret_val = 0;
3937                 break;
3938         case CYGETWAIT:
3939                 ret_val = info->closing_wait / (HZ / 100);
3940                 break;
3941         case TIOCGSERIAL:
3942                 ret_val = get_serial_info(info, argp);
3943                 break;
3944         case TIOCSSERIAL:
3945                 ret_val = set_serial_info(info, argp);
3946                 break;
3947         case TIOCSERGETLSR:     /* Get line status register */
3948                 ret_val = get_lsr_info(info, argp);
3949                 break;
3950                 /*
3951                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3952                  * - mask passed in arg for lines of interest
3953                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3954                  * Caller should use TIOCGICOUNT to see which one it was
3955                  */
3956         case TIOCMIWAIT:
3957                 spin_lock_irqsave(&info->card->card_lock, flags);
3958                 /* note the counters on entry */
3959                 cnow = info->icount;
3960                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3961                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3962                         cprev = cnow;
3963                         spin_lock_irqsave(&info->card->card_lock, flags);
3964                         cnow = info->icount;    /* atomic copy */
3965                         spin_unlock_irqrestore(&info->card->card_lock, flags);
3966
3967                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3968                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3969                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
3970                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3971                 }));
3972                 break;
3973
3974                 /*
3975                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3976                  * Return: write counters to the user passed counter struct
3977                  * NB: both 1->0 and 0->1 transitions are counted except for
3978                  *     RI where only 0->1 is counted.
3979                  */
3980         case TIOCGICOUNT:
3981                 spin_lock_irqsave(&info->card->card_lock, flags);
3982                 cnow = info->icount;
3983                 spin_unlock_irqrestore(&info->card->card_lock, flags);
3984                 p_cuser = argp;
3985                 ret_val = put_user(cnow.cts, &p_cuser->cts);
3986                 if (ret_val)
3987                         break;
3988                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
3989                 if (ret_val)
3990                         break;
3991                 ret_val = put_user(cnow.rng, &p_cuser->rng);
3992                 if (ret_val)
3993                         break;
3994                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
3995                 if (ret_val)
3996                         break;
3997                 ret_val = put_user(cnow.rx, &p_cuser->rx);
3998                 if (ret_val)
3999                         break;
4000                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4001                 if (ret_val)
4002                         break;
4003                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4004                 if (ret_val)
4005                         break;
4006                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4007                 if (ret_val)
4008                         break;
4009                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4010                 if (ret_val)
4011                         break;
4012                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4013                 if (ret_val)
4014                         break;
4015                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4016                 if (ret_val)
4017                         break;
4018                 ret_val = 0;
4019                 break;
4020         default:
4021                 ret_val = -ENOIOCTLCMD;
4022         }
4023         unlock_kernel();
4024
4025 #ifdef CY_DEBUG_OTHER
4026         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4027 #endif
4028         return ret_val;
4029 }                               /* cy_ioctl */
4030
4031 /*
4032  * This routine allows the tty driver to be notified when
4033  * device's termios settings have changed.  Note that a
4034  * well-designed tty driver should be prepared to accept the case
4035  * where old == NULL, and try to do something rational.
4036  */
4037 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4038 {
4039         struct cyclades_port *info = tty->driver_data;
4040
4041 #ifdef CY_DEBUG_OTHER
4042         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4043 #endif
4044
4045         set_line_char(info);
4046
4047         if ((old_termios->c_cflag & CRTSCTS) &&
4048                         !(tty->termios->c_cflag & CRTSCTS)) {
4049                 tty->hw_stopped = 0;
4050                 cy_start(tty);
4051         }
4052 #if 0
4053         /*
4054          * No need to wake up processes in open wait, since they
4055          * sample the CLOCAL flag once, and don't recheck it.
4056          * XXX  It's not clear whether the current behavior is correct
4057          * or not.  Hence, this may change.....
4058          */
4059         if (!(old_termios->c_cflag & CLOCAL) &&
4060             (tty->termios->c_cflag & CLOCAL))
4061                 wake_up_interruptible(&info->open_wait);
4062 #endif
4063 }                               /* cy_set_termios */
4064
4065 /* This function is used to send a high-priority XON/XOFF character to
4066    the device.
4067 */
4068 static void cy_send_xchar(struct tty_struct *tty, char ch)
4069 {
4070         struct cyclades_port *info = tty->driver_data;
4071         struct cyclades_card *card;
4072         int channel;
4073
4074         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4075                 return;
4076
4077         info->x_char = ch;
4078
4079         if (ch)
4080                 cy_start(tty);
4081
4082         card = info->card;
4083         channel = info->line - card->first_line;
4084
4085         if (IS_CYC_Z(*card)) {
4086                 if (ch == STOP_CHAR(tty))
4087                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4088                 else if (ch == START_CHAR(tty))
4089                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4090         }
4091 }
4092
4093 /* This routine is called by the upper-layer tty layer to signal
4094    that incoming characters should be throttled because the input
4095    buffers are close to full.
4096  */
4097 static void cy_throttle(struct tty_struct *tty)
4098 {
4099         struct cyclades_port *info = tty->driver_data;
4100         struct cyclades_card *card;
4101         unsigned long flags;
4102         void __iomem *base_addr;
4103         int chip, channel, index;
4104
4105 #ifdef CY_DEBUG_THROTTLE
4106         char buf[64];
4107
4108         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4109                         tty->ldisc.chars_in_buffer(tty), info->line);
4110 #endif
4111
4112         if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4113                 return;
4114
4115         card = info->card;
4116
4117         if (I_IXOFF(tty)) {
4118                 if (!IS_CYC_Z(*card))
4119                         cy_send_xchar(tty, STOP_CHAR(tty));
4120                 else
4121                         info->throttle = 1;
4122         }
4123
4124         if (tty->termios->c_cflag & CRTSCTS) {
4125                 channel = info->line - card->first_line;
4126                 if (!IS_CYC_Z(*card)) {
4127                         chip = channel >> 2;
4128                         channel &= 0x03;
4129                         index = card->bus_index;
4130                         base_addr = card->base_addr +
4131                                 (cy_chip_offset[chip] << index);
4132
4133                         spin_lock_irqsave(&card->card_lock, flags);
4134                         cy_writeb(base_addr + (CyCAR << index),
4135                                   (u_char) channel);
4136                         if (info->rtsdtr_inv) {
4137                                 cy_writeb(base_addr + (CyMSVR2 << index),
4138                                           ~CyDTR);
4139                         } else {
4140                                 cy_writeb(base_addr + (CyMSVR1 << index),
4141                                           ~CyRTS);
4142                         }
4143                         spin_unlock_irqrestore(&card->card_lock, flags);
4144                 } else {
4145                         info->throttle = 1;
4146                 }
4147         }
4148 }                               /* cy_throttle */
4149
4150 /*
4151  * This routine notifies the tty driver that it should signal
4152  * that characters can now be sent to the tty without fear of
4153  * overrunning the input buffers of the line disciplines.
4154  */
4155 static void cy_unthrottle(struct tty_struct *tty)
4156 {
4157         struct cyclades_port *info = tty->driver_data;
4158         struct cyclades_card *card;
4159         unsigned long flags;
4160         void __iomem *base_addr;
4161         int chip, channel, index;
4162
4163 #ifdef CY_DEBUG_THROTTLE
4164         char buf[64];
4165
4166         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4167                 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4168 #endif
4169
4170         if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4171                 return;
4172
4173         if (I_IXOFF(tty)) {
4174                 if (info->x_char)
4175                         info->x_char = 0;
4176                 else
4177                         cy_send_xchar(tty, START_CHAR(tty));
4178         }
4179
4180         if (tty->termios->c_cflag & CRTSCTS) {
4181                 card = info->card;
4182                 channel = info->line - card->first_line;
4183                 if (!IS_CYC_Z(*card)) {
4184                         chip = channel >> 2;
4185                         channel &= 0x03;
4186                         index = card->bus_index;
4187                         base_addr = card->base_addr +
4188                                 (cy_chip_offset[chip] << index);
4189
4190                         spin_lock_irqsave(&card->card_lock, flags);
4191                         cy_writeb(base_addr + (CyCAR << index),
4192                                   (u_char) channel);
4193                         if (info->rtsdtr_inv) {
4194                                 cy_writeb(base_addr + (CyMSVR2 << index),
4195                                           CyDTR);
4196                         } else {
4197                                 cy_writeb(base_addr + (CyMSVR1 << index),
4198                                           CyRTS);
4199                         }
4200                         spin_unlock_irqrestore(&card->card_lock, flags);
4201                 } else {
4202                         info->throttle = 0;
4203                 }
4204         }
4205 }                               /* cy_unthrottle */
4206
4207 /* cy_start and cy_stop provide software output flow control as a
4208    function of XON/XOFF, software CTS, and other such stuff.
4209 */
4210 static void cy_stop(struct tty_struct *tty)
4211 {
4212         struct cyclades_card *cinfo;
4213         struct cyclades_port *info = tty->driver_data;
4214         void __iomem *base_addr;
4215         int chip, channel, index;
4216         unsigned long flags;
4217
4218 #ifdef CY_DEBUG_OTHER
4219         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4220 #endif
4221
4222         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4223                 return;
4224
4225         cinfo = info->card;
4226         channel = info->line - cinfo->first_line;
4227         if (!IS_CYC_Z(*cinfo)) {
4228                 index = cinfo->bus_index;
4229                 chip = channel >> 2;
4230                 channel &= 0x03;
4231                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4232
4233                 spin_lock_irqsave(&cinfo->card_lock, flags);
4234                 cy_writeb(base_addr + (CyCAR << index),
4235                         (u_char)(channel & 0x0003)); /* index channel */
4236                 cy_writeb(base_addr + (CySRER << index),
4237                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4238                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4239         }
4240 }                               /* cy_stop */
4241
4242 static void cy_start(struct tty_struct *tty)
4243 {
4244         struct cyclades_card *cinfo;
4245         struct cyclades_port *info = tty->driver_data;
4246         void __iomem *base_addr;
4247         int chip, channel, index;
4248         unsigned long flags;
4249
4250 #ifdef CY_DEBUG_OTHER
4251         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4252 #endif
4253
4254         if (serial_paranoia_check(info, tty->name, "cy_start"))
4255                 return;
4256
4257         cinfo = info->card;
4258         channel = info->line - cinfo->first_line;
4259         index = cinfo->bus_index;
4260         if (!IS_CYC_Z(*cinfo)) {
4261                 chip = channel >> 2;
4262                 channel &= 0x03;
4263                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4264
4265                 spin_lock_irqsave(&cinfo->card_lock, flags);
4266                 cy_writeb(base_addr + (CyCAR << index),
4267                         (u_char) (channel & 0x0003));   /* index channel */
4268                 cy_writeb(base_addr + (CySRER << index),
4269                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4270                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4271         }
4272 }                               /* cy_start */
4273
4274 static void cy_flush_buffer(struct tty_struct *tty)
4275 {
4276         struct cyclades_port *info = tty->driver_data;
4277         struct cyclades_card *card;
4278         int channel, retval;
4279         unsigned long flags;
4280
4281 #ifdef CY_DEBUG_IO
4282         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4283 #endif
4284
4285         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4286                 return;
4287
4288         card = info->card;
4289         channel = info->line - card->first_line;
4290
4291         spin_lock_irqsave(&card->card_lock, flags);
4292         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4293         spin_unlock_irqrestore(&card->card_lock, flags);
4294
4295         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4296                                            buffers as well */
4297                 spin_lock_irqsave(&card->card_lock, flags);
4298                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4299                 if (retval != 0) {
4300                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4301                                 "was %x\n", info->line, retval);
4302                 }
4303                 spin_unlock_irqrestore(&card->card_lock, flags);
4304         }
4305         tty_wakeup(tty);
4306 }                               /* cy_flush_buffer */
4307
4308 /*
4309  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4310  */
4311 static void cy_hangup(struct tty_struct *tty)
4312 {
4313         struct cyclades_port *info = tty->driver_data;
4314
4315 #ifdef CY_DEBUG_OTHER
4316         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4317 #endif
4318
4319         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4320                 return;
4321
4322         cy_flush_buffer(tty);
4323         shutdown(info);
4324         info->count = 0;
4325 #ifdef CY_DEBUG_COUNT
4326         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4327                 current->pid);
4328 #endif
4329         info->tty = NULL;
4330         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4331         wake_up_interruptible(&info->open_wait);
4332 }                               /* cy_hangup */
4333
4334 /*
4335  * ---------------------------------------------------------------------
4336  * cy_init() and friends
4337  *
4338  * cy_init() is called at boot-time to initialize the serial driver.
4339  * ---------------------------------------------------------------------
4340  */
4341
4342 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4343 {
4344         struct cyclades_port *info;
4345         u32 uninitialized_var(mailbox);
4346         unsigned int nports, port;
4347         unsigned short chip_number;
4348         int uninitialized_var(index);
4349
4350         spin_lock_init(&cinfo->card_lock);
4351
4352         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4353                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4354                                      cinfo->ctl_addr)->mail_box_0);
4355                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4356                 cinfo->intr_enabled = 0;
4357                 cinfo->nports = 0;      /* Will be correctly set later, after
4358                                            Z FW is loaded */
4359         } else {
4360                 index = cinfo->bus_index;
4361                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4362         }
4363
4364         cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4365         if (cinfo->ports == NULL) {
4366                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4367                 cinfo->nports = 0;
4368                 return -ENOMEM;
4369         }
4370
4371         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4372                         port++) {
4373                 info = &cinfo->ports[port - cinfo->first_line];
4374                 info->magic = CYCLADES_MAGIC;
4375                 info->card = cinfo;
4376                 info->line = port;
4377                 info->flags = STD_COM_FLAGS;
4378                 info->closing_wait = CLOSING_WAIT_DELAY;
4379                 info->close_delay = 5 * HZ / 10;
4380
4381                 init_waitqueue_head(&info->open_wait);
4382                 init_waitqueue_head(&info->close_wait);
4383                 init_completion(&info->shutdown_wait);
4384                 init_waitqueue_head(&info->delta_msr_wait);
4385
4386                 if (IS_CYC_Z(*cinfo)) {
4387                         info->type = PORT_STARTECH;
4388                         if (mailbox == ZO_V1)
4389                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4390                         else
4391                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4392 #ifdef CONFIG_CYZ_INTR
4393                         setup_timer(&cyz_rx_full_timer[port],
4394                                 cyz_rx_restart, (unsigned long)info);
4395 #endif
4396                 } else {
4397                         info->type = PORT_CIRRUS;
4398                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4399                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4400                         info->cor2 = CyETC;
4401                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4402
4403                         chip_number = (port - cinfo->first_line) / 4;
4404                         info->chip_rev = readb(cinfo->base_addr +
4405                                       (cy_chip_offset[chip_number] << index) +
4406                                       (CyGFRCR << index));
4407
4408                         if (info->chip_rev >= CD1400_REV_J) {
4409                                 /* It is a CD1400 rev. J or later */
4410                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4411                                 info->tco = baud_co_60[13];     /* Tx CO */
4412                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4413                                 info->rco = baud_co_60[13];     /* Rx CO */
4414                                 info->rtsdtr_inv = 1;
4415                         } else {
4416                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4417                                 info->tco = baud_co_25[13];     /* Tx CO */
4418                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4419                                 info->rco = baud_co_25[13];     /* Rx CO */
4420                                 info->rtsdtr_inv = 0;
4421                         }
4422                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4423                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4424                 }
4425
4426         }
4427
4428 #ifndef CONFIG_CYZ_INTR
4429         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4430                 mod_timer(&cyz_timerlist, jiffies + 1);
4431 #ifdef CY_PCI_DEBUG
4432                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4433 #endif
4434         }
4435 #endif
4436         return 0;
4437 }
4438
4439 /* initialize chips on Cyclom-Y card -- return number of valid
4440    chips (which is number of ports/4) */
4441 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4442                 int index)
4443 {
4444         unsigned int chip_number;
4445         void __iomem *base_addr;
4446
4447         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4448         /* Cy_HwReset is 0x1400 */
4449         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4450         /* Cy_ClrIntr is 0x1800 */
4451         udelay(500L);
4452
4453         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4454                                                         chip_number++) {
4455                 base_addr =
4456                     true_base_addr + (cy_chip_offset[chip_number] << index);
4457                 mdelay(1);
4458                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4459                         /*************
4460                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4461                         chip_number, (unsigned long)base_addr);
4462                         *************/
4463                         return chip_number;
4464                 }
4465
4466                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4467                 udelay(10L);
4468
4469                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4470                    cannot distinguish between references to chip 0 and a non-
4471                    existent chip 4.  If the preceding clearing of the supposed
4472                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4473                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4474                  */
4475                 if (chip_number == 4 && readb(true_base_addr +
4476                                 (cy_chip_offset[0] << index) +
4477                                 (CyGFRCR << index)) == 0) {
4478                         return chip_number;
4479                 }
4480
4481                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4482                 mdelay(1);
4483
4484                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4485                         /*
4486                            printk(" chip #%d at %#6lx is not responding ",
4487                            chip_number, (unsigned long)base_addr);
4488                            printk("(GFRCR stayed 0)\n",
4489                          */
4490                         return chip_number;
4491                 }
4492                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4493                                 0x40) {
4494                         /*
4495                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4496                                         "%#2x)\n",
4497                                         chip_number, (unsigned long)base_addr,
4498                                         base_addr[CyGFRCR<<index]);
4499                          */
4500                         return chip_number;
4501                 }
4502                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4503                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4504                         /* It is a CD1400 rev. J or later */
4505                         /* Impossible to reach 5ms with this chip.
4506                            Changed to 2ms instead (f = 500 Hz). */
4507                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4508                 } else {
4509                         /* f = 200 Hz */
4510                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4511                 }
4512
4513                 /*
4514                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4515                    chip_number, (unsigned long)base_addr,
4516                    readb(base_addr+(CyGFRCR<<index)));
4517                  */
4518         }
4519         return chip_number;
4520 }                               /* cyy_init_card */
4521
4522 /*
4523  * ---------------------------------------------------------------------
4524  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4525  * sets global variables and return the number of ISA boards found.
4526  * ---------------------------------------------------------------------
4527  */
4528 static int __init cy_detect_isa(void)
4529 {
4530 #ifdef CONFIG_ISA
4531         unsigned short cy_isa_irq, nboard;
4532         void __iomem *cy_isa_address;
4533         unsigned short i, j, cy_isa_nchan;
4534 #ifdef MODULE
4535         int isparam = 0;
4536 #endif
4537
4538         nboard = 0;
4539
4540 #ifdef MODULE
4541         /* Check for module parameters */
4542         for (i = 0; i < NR_CARDS; i++) {
4543                 if (maddr[i] || i) {
4544                         isparam = 1;
4545                         cy_isa_addresses[i] = maddr[i];
4546                 }
4547                 if (!maddr[i])
4548                         break;
4549         }
4550 #endif
4551
4552         /* scan the address table probing for Cyclom-Y/ISA boards */
4553         for (i = 0; i < NR_ISA_ADDRS; i++) {
4554                 unsigned int isa_address = cy_isa_addresses[i];
4555                 if (isa_address == 0x0000)
4556                         return nboard;
4557
4558                 /* probe for CD1400... */
4559                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4560                 if (cy_isa_address == NULL) {
4561                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4562                                         "address\n");
4563                         continue;
4564                 }
4565                 cy_isa_nchan = CyPORTS_PER_CHIP *
4566                         cyy_init_card(cy_isa_address, 0);
4567                 if (cy_isa_nchan == 0) {
4568                         iounmap(cy_isa_address);
4569                         continue;
4570                 }
4571 #ifdef MODULE
4572                 if (isparam && irq[i])
4573                         cy_isa_irq = irq[i];
4574                 else
4575 #endif
4576                         /* find out the board's irq by probing */
4577                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4578                 if (cy_isa_irq == 0) {
4579                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4580                                 "IRQ could not be detected.\n",
4581                                 (unsigned long)cy_isa_address);
4582                         iounmap(cy_isa_address);
4583                         continue;
4584                 }
4585
4586                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4587                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4588                                 "more channels are available. Change NR_PORTS "
4589                                 "in cyclades.c and recompile kernel.\n",
4590                                 (unsigned long)cy_isa_address);
4591                         iounmap(cy_isa_address);
4592                         return nboard;
4593                 }
4594                 /* fill the next cy_card structure available */
4595                 for (j = 0; j < NR_CARDS; j++) {
4596                         if (cy_card[j].base_addr == NULL)
4597                                 break;
4598                 }
4599                 if (j == NR_CARDS) {    /* no more cy_cards available */
4600                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4601                                 "more cards can be used. Change NR_CARDS in "
4602                                 "cyclades.c and recompile kernel.\n",
4603                                 (unsigned long)cy_isa_address);
4604                         iounmap(cy_isa_address);
4605                         return nboard;
4606                 }
4607
4608                 /* allocate IRQ */
4609                 if (request_irq(cy_isa_irq, cyy_interrupt,
4610                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4611                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4612                                 "could not allocate IRQ#%d.\n",
4613                                 (unsigned long)cy_isa_address, cy_isa_irq);
4614                         iounmap(cy_isa_address);
4615                         return nboard;
4616                 }
4617
4618                 /* set cy_card */
4619                 cy_card[j].base_addr = cy_isa_address;
4620                 cy_card[j].ctl_addr = NULL;
4621                 cy_card[j].irq = (int)cy_isa_irq;
4622                 cy_card[j].bus_index = 0;
4623                 cy_card[j].first_line = cy_next_channel;
4624                 cy_card[j].num_chips = cy_isa_nchan / 4;
4625                 if (cy_init_card(&cy_card[j])) {
4626                         cy_card[j].base_addr = NULL;
4627                         free_irq(cy_isa_irq, &cy_card[j]);
4628                         iounmap(cy_isa_address);
4629                         continue;
4630                 }
4631                 nboard++;
4632
4633                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4634                         "%d channels starting from port %d\n",
4635                         j + 1, (unsigned long)cy_isa_address,
4636                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4637                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4638
4639                 for (j = cy_next_channel;
4640                                 j < cy_next_channel + cy_isa_nchan; j++)
4641                         tty_register_device(cy_serial_driver, j, NULL);
4642                 cy_next_channel += cy_isa_nchan;
4643         }
4644         return nboard;
4645 #else
4646         return 0;
4647 #endif                          /* CONFIG_ISA */
4648 }                               /* cy_detect_isa */
4649
4650 #ifdef CONFIG_PCI
4651 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4652 {
4653         unsigned int a;
4654
4655         for (a = 0; a < size && *str; a++, str++)
4656                 if (*str & 0x80)
4657                         return -EINVAL;
4658
4659         for (; a < size; a++, str++)
4660                 if (*str)
4661                         return -EINVAL;
4662
4663         return 0;
4664 }
4665
4666 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4667                 unsigned int size)
4668 {
4669         for (; size > 0; size--) {
4670                 cy_writel(fpga, *data++);
4671                 udelay(10);
4672         }
4673 }
4674
4675 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4676                 struct RUNTIME_9060 __iomem *addr)
4677 {
4678         /* Reset PLX */
4679         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4680         udelay(100L);
4681         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4682
4683         /* Reload Config. Registers from EEPROM */
4684         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4685         udelay(100L);
4686         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4687
4688         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4689          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4690          * registers. This will remain here until we find a permanent fix.
4691          */
4692         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4693 }
4694
4695 static int __devinit __cyz_load_fw(const struct firmware *fw,
4696                 const char *name, const u32 mailbox, void __iomem *base,
4697                 void __iomem *fpga)
4698 {
4699         void *ptr = fw->data;
4700         struct zfile_header *h = ptr;
4701         struct zfile_config *c, *cs;
4702         struct zfile_block *b, *bs;
4703         unsigned int a, tmp, len = fw->size;
4704 #define BAD_FW KERN_ERR "Bad firmware: "
4705         if (len < sizeof(*h)) {
4706                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4707                 return -EINVAL;
4708         }
4709
4710         cs = ptr + h->config_offset;
4711         bs = ptr + h->block_offset;
4712
4713         if ((void *)(cs + h->n_config) > ptr + len ||
4714                         (void *)(bs + h->n_blocks) > ptr + len) {
4715                 printk(BAD_FW "too short");
4716                 return  -EINVAL;
4717         }
4718
4719         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4720                         cyc_isfwstr(h->date, sizeof(h->date))) {
4721                 printk(BAD_FW "bad formatted header string\n");
4722                 return -EINVAL;
4723         }
4724
4725         if (strncmp(name, h->name, sizeof(h->name))) {
4726                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4727                 return -EINVAL;
4728         }
4729
4730         tmp = 0;
4731         for (c = cs; c < cs + h->n_config; c++) {
4732                 for (a = 0; a < c->n_blocks; a++)
4733                         if (c->block_list[a] > h->n_blocks) {
4734                                 printk(BAD_FW "bad block ref number in cfgs\n");
4735                                 return -EINVAL;
4736                         }
4737                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4738                         tmp++;
4739         }
4740         if (!tmp) {
4741                 printk(BAD_FW "nothing appropriate\n");
4742                 return -EINVAL;
4743         }
4744
4745         for (b = bs; b < bs + h->n_blocks; b++)
4746                 if (b->file_offset + b->size > len) {
4747                         printk(BAD_FW "bad block data offset\n");
4748                         return -EINVAL;
4749                 }
4750
4751         /* everything is OK, let's seek'n'load it */
4752         for (c = cs; c < cs + h->n_config; c++)
4753                 if (c->mailbox == mailbox && c->function == 0)
4754                         break;
4755
4756         for (a = 0; a < c->n_blocks; a++) {
4757                 b = &bs[c->block_list[a]];
4758                 if (b->type == ZBLOCK_FPGA) {
4759                         if (fpga != NULL)
4760                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4761                                                 b->size);
4762                 } else {
4763                         if (base != NULL)
4764                                 memcpy_toio(base + b->ram_offset,
4765                                                ptr + b->file_offset, b->size);
4766                 }
4767         }
4768 #undef BAD_FW
4769         return 0;
4770 }
4771
4772 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4773                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4774 {
4775         const struct firmware *fw;
4776         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4777         struct CUSTOM_REG __iomem *cust = base_addr;
4778         struct ZFW_CTRL __iomem *pt_zfwctrl;
4779         void __iomem *tmp;
4780         u32 mailbox, status;
4781         unsigned int i;
4782         int retval;
4783
4784         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4785         if (retval) {
4786                 dev_err(&pdev->dev, "can't get firmware\n");
4787                 goto err;
4788         }
4789
4790         /* Check whether the firmware is already loaded and running. If
4791            positive, skip this board */
4792         if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4793                 u32 cntval = readl(base_addr + 0x190);
4794
4795                 udelay(100);
4796                 if (cntval != readl(base_addr + 0x190)) {
4797                         /* FW counter is working, FW is running */
4798                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4799                                         "Skipping board.\n");
4800                         retval = 0;
4801                         goto err_rel;
4802                 }
4803         }
4804
4805         /* start boot */
4806         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4807                         ~0x00030800UL);
4808
4809         mailbox = readl(&ctl_addr->mail_box_0);
4810
4811         if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4812                 /* stops CPU and set window to beginning of RAM */
4813                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4814                 cy_writel(&cust->cpu_stop, 0);
4815                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4816                 udelay(100);
4817         }
4818
4819         plx_init(pdev, irq, ctl_addr);
4820
4821         if (mailbox != 0) {
4822                 /* load FPGA */
4823                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4824                                 base_addr);
4825                 if (retval)
4826                         goto err_rel;
4827                 if (!Z_FPGA_LOADED(ctl_addr)) {
4828                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4829                                         "not loaded\n");
4830                         goto err_rel;
4831                 }
4832         }
4833
4834         /* stops CPU and set window to beginning of RAM */
4835         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4836         cy_writel(&cust->cpu_stop, 0);
4837         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4838         udelay(100);
4839
4840         /* clear memory */
4841         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4842                 cy_writeb(tmp, 255);
4843         if (mailbox != 0) {
4844                 /* set window to last 512K of RAM */
4845                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4846                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4847                         cy_writeb(tmp, 255);
4848                 /* set window to beginning of RAM */
4849                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4850         }
4851
4852         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4853         release_firmware(fw);
4854         if (retval)
4855                 goto err;
4856
4857         /* finish boot and start boards */
4858         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4859         cy_writel(&cust->cpu_start, 0);
4860         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4861         i = 0;
4862         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4863                 msleep(100);
4864         if (status != ZFIRM_ID) {
4865                 if (status == ZFIRM_HLT) {
4866                         dev_err(&pdev->dev, "you need an external power supply "
4867                                 "for this number of ports. Firmware halted and "
4868                                 "board reset.\n");
4869                         retval = -EIO;
4870                         goto err;
4871                 }
4872                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4873                                 "some more time\n", status);
4874                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4875                                 i++ < 200)
4876                         msleep(100);
4877                 if (status != ZFIRM_ID) {
4878                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
4879                                         "Giving up. (fid->signature = 0x%x)\n",
4880                                         status);
4881                         dev_info(&pdev->dev, "*** Warning ***: if you are "
4882                                 "upgrading the FW, please power cycle the "
4883                                 "system before loading the new FW to the "
4884                                 "Cyclades-Z.\n");
4885
4886                         if (Z_FPGA_LOADED(ctl_addr))
4887                                 plx_init(pdev, irq, ctl_addr);
4888
4889                         retval = -EIO;
4890                         goto err;
4891                 }
4892                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4893                                 i / 10);
4894         }
4895         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4896
4897         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4898                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4899                         base_addr + readl(&fid->zfwctrl_addr));
4900
4901         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4902                 readl(&pt_zfwctrl->board_ctrl.fw_version),
4903                 readl(&pt_zfwctrl->board_ctrl.n_channel));
4904
4905         if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4906                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4907                         "check the connection between the Z host card and the "
4908                         "serial expanders.\n");
4909
4910                 if (Z_FPGA_LOADED(ctl_addr))
4911                         plx_init(pdev, irq, ctl_addr);
4912
4913                 dev_info(&pdev->dev, "Null number of ports detected. Board "
4914                                 "reset.\n");
4915                 retval = 0;
4916                 goto err;
4917         }
4918
4919         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4920         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4921
4922         /*
4923            Early firmware failed to start looking for commands.
4924            This enables firmware interrupts for those commands.
4925          */
4926         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4927                         (1 << 17));
4928         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4929                         0x00030800UL);
4930
4931         plx_init(pdev, irq, ctl_addr);
4932
4933         return 0;
4934 err_rel:
4935         release_firmware(fw);
4936 err:
4937         return retval;
4938 }
4939
4940 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4941                 const struct pci_device_id *ent)
4942 {
4943         void __iomem *addr0 = NULL, *addr2 = NULL;
4944         char *card_name = NULL;
4945         u32 mailbox;
4946         unsigned int device_id, nchan = 0, card_no, i;
4947         unsigned char plx_ver;
4948         int retval, irq;
4949
4950         retval = pci_enable_device(pdev);
4951         if (retval) {
4952                 dev_err(&pdev->dev, "cannot enable device\n");
4953                 goto err;
4954         }
4955
4956         /* read PCI configuration area */
4957         irq = pdev->irq;
4958         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4959
4960 #if defined(__alpha__)
4961         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4962                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4963                         "addresses on Alpha systems.\n");
4964                 retval = -EIO;
4965                 goto err_dis;
4966         }
4967 #endif
4968         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4969                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4970                         "addresses\n");
4971                 retval = -EIO;
4972                 goto err_dis;
4973         }
4974
4975         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4976                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4977                                 "it...\n");
4978                 pdev->resource[2].flags &= ~IORESOURCE_IO;
4979         }
4980
4981         retval = pci_request_regions(pdev, "cyclades");
4982         if (retval) {
4983                 dev_err(&pdev->dev, "failed to reserve resources\n");
4984                 goto err_dis;
4985         }
4986
4987         retval = -EIO;
4988         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4989                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4990                 card_name = "Cyclom-Y";
4991
4992                 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4993                 if (addr0 == NULL) {
4994                         dev_err(&pdev->dev, "can't remap ctl region\n");
4995                         goto err_reg;
4996                 }
4997                 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4998                 if (addr2 == NULL) {
4999                         dev_err(&pdev->dev, "can't remap base region\n");
5000                         goto err_unmap;
5001                 }
5002
5003                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5004                 if (nchan == 0) {
5005                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5006                                         "Serial-Modules\n");
5007                         return -EIO;
5008                 }
5009         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5010                 struct RUNTIME_9060 __iomem *ctl_addr;
5011
5012                 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5013                 if (addr0 == NULL) {
5014                         dev_err(&pdev->dev, "can't remap ctl region\n");
5015                         goto err_reg;
5016                 }
5017
5018                 /* Disable interrupts on the PLX before resetting it */
5019                 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5020
5021                 plx_init(pdev, irq, addr0);
5022
5023                 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5024
5025                 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5026                                 CyPCI_Ze_win : CyPCI_Zwin);
5027                 if (addr2 == NULL) {
5028                         dev_err(&pdev->dev, "can't remap base region\n");
5029                         goto err_unmap;
5030                 }
5031
5032                 if (mailbox == ZE_V1) {
5033                         card_name = "Cyclades-Ze";
5034
5035                         readl(&ctl_addr->mail_box_0);
5036                         nchan = ZE_V1_NPORTS;
5037                 } else {
5038                         card_name = "Cyclades-8Zo";
5039
5040 #ifdef CY_PCI_DEBUG
5041                         if (mailbox == ZO_V1) {
5042                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5043                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5044                                         "id %lx, ver %lx\n", (ulong)(0xff &
5045                                         readl(&((struct CUSTOM_REG *)addr2)->
5046                                                 fpga_id)), (ulong)(0xff &
5047                                         readl(&((struct CUSTOM_REG *)addr2)->
5048                                                 fpga_version)));
5049                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5050                         } else {
5051                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5052                                         "Cyclades-Z board.  FPGA not loaded\n");
5053                         }
5054 #endif
5055                         /* The following clears the firmware id word.  This
5056                            ensures that the driver will not attempt to talk to
5057                            the board until it has been properly initialized.
5058                          */
5059                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5060                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5061
5062                         retval = cyz_load_fw(pdev, addr2, addr0, irq);
5063                         if (retval)
5064                                 goto err_unmap;
5065                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5066                            version will have a different device_id and will
5067                            be allocated its maximum number of ports. */
5068                         nchan = 8;
5069                 }
5070         }
5071
5072         if ((cy_next_channel + nchan) > NR_PORTS) {
5073                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5074                         "channels are available. Change NR_PORTS in "
5075                         "cyclades.c and recompile kernel.\n");
5076                 goto err_unmap;
5077         }
5078         /* fill the next cy_card structure available */
5079         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5080                 if (cy_card[card_no].base_addr == NULL)
5081                         break;
5082         }
5083         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5084                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5085                         "more cards can be used. Change NR_CARDS in "
5086                         "cyclades.c and recompile kernel.\n");
5087                 goto err_unmap;
5088         }
5089
5090         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5091                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5092                 /* allocate IRQ */
5093                 retval = request_irq(irq, cyy_interrupt,
5094                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5095                 if (retval) {
5096                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5097                         goto err_unmap;
5098                 }
5099                 cy_card[card_no].num_chips = nchan / 4;
5100         } else {
5101 #ifdef CONFIG_CYZ_INTR
5102                 /* allocate IRQ only if board has an IRQ */
5103                 if (irq != 0 && irq != 255) {
5104                         retval = request_irq(irq, cyz_interrupt,
5105                                         IRQF_SHARED, "Cyclades-Z",
5106                                         &cy_card[card_no]);
5107                         if (retval) {
5108                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5109                                 goto err_unmap;
5110                         }
5111                 }
5112 #endif                          /* CONFIG_CYZ_INTR */
5113                 cy_card[card_no].num_chips = (unsigned int)-1;
5114         }
5115
5116         /* set cy_card */
5117         cy_card[card_no].base_addr = addr2;
5118         cy_card[card_no].ctl_addr = addr0;
5119         cy_card[card_no].irq = irq;
5120         cy_card[card_no].bus_index = 1;
5121         cy_card[card_no].first_line = cy_next_channel;
5122         retval = cy_init_card(&cy_card[card_no]);
5123         if (retval)
5124                 goto err_null;
5125
5126         pci_set_drvdata(pdev, &cy_card[card_no]);
5127
5128         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5129                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5130                 /* enable interrupts in the PCI interface */
5131                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5132                 switch (plx_ver) {
5133                 case PLX_9050:
5134
5135                         cy_writeb(addr0 + 0x4c, 0x43);
5136                         break;
5137
5138                 case PLX_9060:
5139                 case PLX_9080:
5140                 default:        /* Old boards, use PLX_9060 */
5141                         plx_init(pdev, irq, addr0);
5142                         cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5143                         break;
5144                 }
5145         }
5146
5147         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5148                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5149         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5150                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5151         cy_next_channel += nchan;
5152
5153         return 0;
5154 err_null:
5155         cy_card[card_no].base_addr = NULL;
5156         free_irq(irq, &cy_card[card_no]);
5157 err_unmap:
5158         pci_iounmap(pdev, addr0);
5159         if (addr2)
5160                 pci_iounmap(pdev, addr2);
5161 err_reg:
5162         pci_release_regions(pdev);
5163 err_dis:
5164         pci_disable_device(pdev);
5165 err:
5166         return retval;
5167 }
5168
5169 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5170 {
5171         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5172         unsigned int i;
5173
5174         /* non-Z with old PLX */
5175         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5176                         PLX_9050)
5177                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5178         else
5179 #ifndef CONFIG_CYZ_INTR
5180                 if (!IS_CYC_Z(*cinfo))
5181 #endif
5182                 cy_writew(cinfo->ctl_addr + 0x68,
5183                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5184
5185         pci_iounmap(pdev, cinfo->base_addr);
5186         if (cinfo->ctl_addr)
5187                 pci_iounmap(pdev, cinfo->ctl_addr);
5188         if (cinfo->irq
5189 #ifndef CONFIG_CYZ_INTR
5190                 && !IS_CYC_Z(*cinfo)
5191 #endif /* CONFIG_CYZ_INTR */
5192                 )
5193                 free_irq(cinfo->irq, cinfo);
5194         pci_release_regions(pdev);
5195
5196         cinfo->base_addr = NULL;
5197         for (i = cinfo->first_line; i < cinfo->first_line +
5198                         cinfo->nports; i++)
5199                 tty_unregister_device(cy_serial_driver, i);
5200         cinfo->nports = 0;
5201         kfree(cinfo->ports);
5202 }
5203
5204 static struct pci_driver cy_pci_driver = {
5205         .name = "cyclades",
5206         .id_table = cy_pci_dev_id,
5207         .probe = cy_pci_probe,
5208         .remove = __devexit_p(cy_pci_remove)
5209 };
5210 #endif
5211
5212 static int
5213 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5214                 int *eof, void *data)
5215 {
5216         struct cyclades_port *info;
5217         unsigned int i, j;
5218         int len = 0;
5219         off_t begin = 0;
5220         off_t pos = 0;
5221         int size;
5222         __u32 cur_jifs = jiffies;
5223
5224         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5225                         "IdleIn  Overruns  Ldisc\n");
5226
5227         pos += size;
5228         len += size;
5229
5230         /* Output one line for each known port */
5231         for (i = 0; i < NR_CARDS; i++)
5232                 for (j = 0; j < cy_card[i].nports; j++) {
5233                         info = &cy_card[i].ports[j];
5234
5235                         if (info->count)
5236                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5237                                         "%10lu %8lu %9lu %6ld\n", info->line,
5238                                         (cur_jifs - info->idle_stats.in_use) /
5239                                         HZ, info->idle_stats.xmit_bytes,
5240                                         (cur_jifs - info->idle_stats.xmit_idle)/
5241                                         HZ, info->idle_stats.recv_bytes,
5242                                         (cur_jifs - info->idle_stats.recv_idle)/
5243                                         HZ, info->idle_stats.overruns,
5244                                         (long)info->tty->ldisc.num);
5245                         else
5246                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5247                                         "%10lu %8lu %9lu %6ld\n",
5248                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5249                         len += size;
5250                         pos = begin + len;
5251
5252                         if (pos < offset) {
5253                                 len = 0;
5254                                 begin = pos;
5255                         }
5256                         if (pos > offset + length)
5257                                 goto done;
5258                 }
5259         *eof = 1;
5260 done:
5261         *start = buf + (offset - begin);        /* Start of wanted data */
5262         len -= (offset - begin);        /* Start slop */
5263         if (len > length)
5264                 len = length;   /* Ending slop */
5265         if (len < 0)
5266                 len = 0;
5267         return len;
5268 }
5269
5270 /* The serial driver boot-time initialization code!
5271     Hardware I/O ports are mapped to character special devices on a
5272     first found, first allocated manner.  That is, this code searches
5273     for Cyclom cards in the system.  As each is found, it is probed
5274     to discover how many chips (and thus how many ports) are present.
5275     These ports are mapped to the tty ports 32 and upward in monotonic
5276     fashion.  If an 8-port card is replaced with a 16-port card, the
5277     port mapping on a following card will shift.
5278
5279     This approach is different from what is used in the other serial
5280     device driver because the Cyclom is more properly a multiplexer,
5281     not just an aggregation of serial ports on one card.
5282
5283     If there are more cards with more ports than have been
5284     statically allocated above, a warning is printed and the
5285     extra ports are ignored.
5286  */
5287
5288 static const struct tty_operations cy_ops = {
5289         .open = cy_open,
5290         .close = cy_close,
5291         .write = cy_write,
5292         .put_char = cy_put_char,
5293         .flush_chars = cy_flush_chars,
5294         .write_room = cy_write_room,
5295         .chars_in_buffer = cy_chars_in_buffer,
5296         .flush_buffer = cy_flush_buffer,
5297         .ioctl = cy_ioctl,
5298         .throttle = cy_throttle,
5299         .unthrottle = cy_unthrottle,
5300         .set_termios = cy_set_termios,
5301         .stop = cy_stop,
5302         .start = cy_start,
5303         .hangup = cy_hangup,
5304         .break_ctl = cy_break,
5305         .wait_until_sent = cy_wait_until_sent,
5306         .read_proc = cyclades_get_proc_info,
5307         .tiocmget = cy_tiocmget,
5308         .tiocmset = cy_tiocmset,
5309 };
5310
5311 static int __init cy_init(void)
5312 {
5313         unsigned int nboards;
5314         int retval = -ENOMEM;
5315
5316         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5317         if (!cy_serial_driver)
5318                 goto err;
5319
5320         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5321                         __DATE__, __TIME__);
5322
5323         /* Initialize the tty_driver structure */
5324
5325         cy_serial_driver->owner = THIS_MODULE;
5326         cy_serial_driver->driver_name = "cyclades";
5327         cy_serial_driver->name = "ttyC";
5328         cy_serial_driver->major = CYCLADES_MAJOR;
5329         cy_serial_driver->minor_start = 0;
5330         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5331         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5332         cy_serial_driver->init_termios = tty_std_termios;
5333         cy_serial_driver->init_termios.c_cflag =
5334             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5335         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5336         tty_set_operations(cy_serial_driver, &cy_ops);
5337
5338         retval = tty_register_driver(cy_serial_driver);
5339         if (retval) {
5340                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5341                 goto err_frtty;
5342         }
5343
5344         /* the code below is responsible to find the boards. Each different
5345            type of board has its own detection routine. If a board is found,
5346            the next cy_card structure available is set by the detection
5347            routine. These functions are responsible for checking the
5348            availability of cy_card and cy_port data structures and updating
5349            the cy_next_channel. */
5350
5351         /* look for isa boards */
5352         nboards = cy_detect_isa();
5353
5354 #ifdef CONFIG_PCI
5355         /* look for pci boards */
5356         retval = pci_register_driver(&cy_pci_driver);
5357         if (retval && !nboards) {
5358                 tty_unregister_driver(cy_serial_driver);
5359                 goto err_frtty;
5360         }
5361 #endif
5362
5363         return 0;
5364 err_frtty:
5365         put_tty_driver(cy_serial_driver);
5366 err:
5367         return retval;
5368 }                               /* cy_init */
5369
5370 static void __exit cy_cleanup_module(void)
5371 {
5372         struct cyclades_card *card;
5373         unsigned int i, e1;
5374
5375 #ifndef CONFIG_CYZ_INTR
5376         del_timer_sync(&cyz_timerlist);
5377 #endif /* CONFIG_CYZ_INTR */
5378
5379         e1 = tty_unregister_driver(cy_serial_driver);
5380         if (e1)
5381                 printk(KERN_ERR "failed to unregister Cyclades serial "
5382                                 "driver(%d)\n", e1);
5383
5384 #ifdef CONFIG_PCI
5385         pci_unregister_driver(&cy_pci_driver);
5386 #endif
5387
5388         for (i = 0; i < NR_CARDS; i++) {
5389                 card = &cy_card[i];
5390                 if (card->base_addr) {
5391                         /* clear interrupt */
5392                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5393                         iounmap(card->base_addr);
5394                         if (card->ctl_addr)
5395                                 iounmap(card->ctl_addr);
5396                         if (card->irq
5397 #ifndef CONFIG_CYZ_INTR
5398                                 && !IS_CYC_Z(*card)
5399 #endif /* CONFIG_CYZ_INTR */
5400                                 )
5401                                 free_irq(card->irq, card);
5402                         for (e1 = card->first_line; e1 < card->first_line +
5403                                         card->nports; e1++)
5404                                 tty_unregister_device(cy_serial_driver, e1);
5405                         kfree(card->ports);
5406                 }
5407         }
5408
5409         put_tty_driver(cy_serial_driver);
5410 } /* cy_cleanup_module */
5411
5412 module_init(cy_init);
5413 module_exit(cy_cleanup_module);
5414
5415 MODULE_LICENSE("GPL");
5416 MODULE_VERSION(CY_VERSION);