3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
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.
22 * This version supports shared IRQ's (only for PCI boards).
24 * Prevent users from opening non-existing Z ports.
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.
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
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
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".
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
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
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
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
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
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;
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]
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;
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);
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'
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).
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
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).
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.
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.
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.
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
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
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.
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
159 * removed conditional compilation for new/old PCI structure support
160 * (now the driver only supports the new PCI structure).
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.
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.
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).
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.
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);
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
198 * Fixes related to kernel version conditional
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).
205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
206 * Changes to define the memory window according to the
209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
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.
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
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
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
246 * Deleted some debug messages.
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
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;"
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
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)
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
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.
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;
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;
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;
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
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
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;
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)
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).
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
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.
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;
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
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
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
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
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
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>
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;
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).
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.
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.
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.
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
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.
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.
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
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>);
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>);
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
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>);
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
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
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
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
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
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
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).
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
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)
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
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
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;
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
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
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;
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;
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
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;
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
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
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
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
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
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
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
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
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
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
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
592 #define CY_VERSION "2.5"
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. */
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. */
607 #define ZE_V1_NPORTS 64
612 #define SERIAL_PARANOIA_CHECK
614 #undef CY_DEBUG_THROTTLE
615 #undef CY_DEBUG_OTHER
617 #undef CY_DEBUG_COUNT
619 #undef CY_DEBUG_WAIT_UNTIL_SENT
620 #undef CY_DEBUG_INTERRUPTS
622 #undef CY_ENABLE_MONITORING
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>
650 #include <asm/system.h>
651 #include <linux/io.h>
653 #include <linux/uaccess.h>
655 #include <linux/kernel.h>
656 #include <linux/pci.h>
658 #include <linux/stat.h>
659 #include <linux/proc_fs.h>
661 static void cy_throttle(struct tty_struct *tty);
662 static void cy_send_xchar(struct tty_struct *tty, char ch);
664 #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
666 #define Z_FPGA_CHECK(card) \
667 ((readl(&((struct RUNTIME_9060 __iomem *) \
668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
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)))
676 #ifndef SERIAL_XMIT_SIZE
677 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
679 #define WAKEUP_CHARS 256
681 #define STD_COM_FLAGS (0)
684 #define ZL_MAX_BLOCKS 16
685 #define DRIVER_VERSION 0x02010203
686 #define RAM_SIZE 0x80000
688 #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
695 struct zfile_header {
704 } __attribute__ ((packed));
706 struct zfile_config {
711 u32 block_list[ZL_MAX_BLOCKS];
712 } __attribute__ ((packed));
719 } __attribute__ ((packed));
721 static struct tty_driver *cy_serial_driver;
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.
731 static unsigned int cy_isa_addresses[] = {
740 0, 0, 0, 0, 0, 0, 0, 0
743 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
746 static long maddr[NR_CARDS];
747 static int irq[NR_CARDS];
749 module_param_array(maddr, long, NULL, 0);
750 module_param_array(irq, int, NULL, 0);
753 #endif /* CONFIG_ISA */
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.
758 static struct cyclades_card cy_card[NR_CARDS];
760 static int cy_next_channel; /* next minor available */
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,
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,
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
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
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,
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,
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,
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
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,
826 /* The Cyclom-Ye has placed the sequential chips in non-sequential
827 * address order. This look-up table overcomes that problem.
829 static int cy_chip_offset[] = { 0x0000,
839 /* PCI related definitions */
842 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
854 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
856 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
858 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
859 { } /* end of table */
861 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
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);
868 static unsigned detect_isa_irq(void __iomem *);
869 #endif /* CONFIG_ISA */
871 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
873 #ifndef CONFIG_CYZ_INTR
874 static void cyz_poll(unsigned long);
876 /* The Cyclades-Z polling cycle is defined by this variable */
877 static long cyz_polling_cycle = CZ_DEF_POLL;
879 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
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 */
886 static inline int serial_paranoia_check(struct cyclades_port *info,
887 char *name, const char *routine)
889 #ifdef SERIAL_PARANOIA_CHECK
891 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
892 "in %s\n", name, routine);
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);
903 } /* serial_paranoia_check */
905 /***********************************************************/
906 /********* Start of block of Cyclom-Y specific code ********/
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.
913 This function is only called from inside spinlock-protected code.
915 static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
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)
925 /* if the CCR never cleared, the previous command
926 didn't finish within the "reasonable time" */
930 /* Issue the new command */
931 cy_writeb(base_addr + (CyCCR << index), cmd);
934 } /* cyy_issue_cmd */
937 /* ISA interrupt detection code */
938 static unsigned detect_isa_irq(void __iomem *address)
941 unsigned long irqs, flags;
942 int save_xir, save_car;
943 int index = 0; /* IRQ probing is only for ISA */
945 /* forget possible initially masked and pending IRQ */
946 irq = probe_irq_off(probe_irq_on());
948 /* Clear interrupts on the board first */
949 cy_writeb(address + (Cy_ClrIntr << index), 0);
950 /* Cy_ClrIntr is 0x1800 */
952 irqs = probe_irq_on();
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);
961 cy_writeb(address + (CyCAR << index), 0);
962 cy_writeb(address + (CySRER << index),
963 readb(address + (CySRER << index)) | CyTxRdy);
964 local_irq_restore(flags);
969 /* Check which interrupt is in use */
970 irq = probe_irq_off(irqs);
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 */
983 return (irq > 0) ? irq : 0;
985 #endif /* CONFIG_ISA */
987 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
988 void __iomem *base_addr)
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;
995 #ifdef CY_DEBUG_INTERRUPTS
996 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
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);
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));
1017 /* there is an open port for this data */
1019 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020 CyIVRRxEx) { /* exception */
1021 data = readb(base_addr + (CyRDSR << index));
1023 /* For statistics only */
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++;
1033 if (data & info->ignore_status_mask) {
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);
1044 if (info->flags & ASYNC_SAK)
1046 } else if (data & CyFRAME) {
1047 tty_insert_flip_char(tty,
1048 readb(base_addr + (CyRDSR <<
1049 index)), TTY_FRAME);
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);
1058 info->idle_stats.parity_errs++;
1059 } else if (data & CyOVERRUN) {
1060 tty_insert_flip_char(tty, 0,
1063 /* If the flip buffer itself is
1064 overflowing, we still lose
1065 the next incoming character.
1067 tty_insert_flip_char(tty,
1068 readb(base_addr + (CyRDSR <<
1069 index)), TTY_FRAME);
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) { */
1077 tty_insert_flip_char(tty, 0,
1082 tty_insert_flip_char(tty, 0, TTY_NORMAL);
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++;
1091 } else { /* normal character reception */
1092 /* load # chars available from the chip */
1093 char_count = readb(base_addr + (CyRDCR << index));
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;
1102 len = tty_buffer_request_room(tty, char_count);
1104 data = readb(base_addr + (CyRDSR << index));
1105 tty_insert_flip_char(tty, data, TTY_NORMAL);
1106 info->idle_stats.recv_bytes++;
1112 info->idle_stats.recv_idle = jiffies;
1114 tty_schedule_flip(tty);
1116 /* end of service */
1117 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1118 cy_writeb(base_addr + (CyCAR << index), save_car);
1121 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
1122 void __iomem *base_addr)
1124 struct cyclades_port *info;
1125 int char_count, index = cinfo->bus_index;
1126 u8 save_xir, channel, save_car, outch;
1128 /* Since we only get here when the transmit buffer
1129 is empty, we know we can always stuff a dozen
1131 #ifdef CY_DEBUG_INTERRUPTS
1132 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
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);
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);
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);
1154 /* load the on-chip space for outbound data */
1155 char_count = info->xmit_fifo_size;
1157 if (info->x_char) { /* send special char */
1158 outch = info->x_char;
1159 cy_writeb(base_addr + (CyTDR << index), outch);
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);
1172 if (info->breakoff) {
1173 cy_writeb(base_addr + (CyTDR << index), 0);
1174 cy_writeb(base_addr + (CyTDR << index), 0x83);
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)) &
1187 cy_writeb(base_addr + (CySRER << index),
1188 (readb(base_addr + (CySRER << index)) &
1189 ~CyTxRdy) | CyTxMpty);
1193 if (info->xmit_buf == NULL) {
1194 cy_writeb(base_addr + (CySRER << index),
1195 readb(base_addr + (CySRER << index)) &
1199 if (info->tty->stopped || info->tty->hw_stopped) {
1200 cy_writeb(base_addr + (CySRER << index),
1201 readb(base_addr + (CySRER << index)) &
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.)
1214 outch = info->xmit_buf[info->xmit_tail];
1217 info->xmit_tail = (info->xmit_tail + 1) &
1218 (SERIAL_XMIT_SIZE - 1);
1219 cy_writeb(base_addr + (CyTDR << index), outch);
1222 if (char_count > 1) {
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);
1235 tty_wakeup(info->tty);
1237 /* end of service */
1238 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239 cy_writeb(base_addr + (CyCAR << index), save_car);
1242 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243 void __iomem *base_addr)
1245 struct cyclades_port *info;
1246 int index = cinfo->bus_index;
1247 u8 save_xir, channel, save_car, mdm_change, mdm_status;
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);
1256 mdm_change = readb(base_addr + (CyMISR << index));
1257 mdm_status = readb(base_addr + (CyMSVR1 << index));
1262 if (mdm_change & CyANY_DELTA) {
1263 /* For statistics only */
1264 if (mdm_change & CyDCD)
1266 if (mdm_change & CyCTS)
1268 if (mdm_change & CyDSR)
1270 if (mdm_change & CyRI)
1273 wake_up_interruptible(&info->delta_msr_wait);
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;
1281 wake_up_interruptible(&info->open_wait);
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
1288 info->tty->hw_stopped = 0;
1289 cy_writeb(base_addr + (CySRER << index),
1290 readb(base_addr + (CySRER << index)) |
1292 tty_wakeup(info->tty);
1295 if (!(mdm_status & CyCTS)) {
1296 /* cy_stop isn't used
1298 info->tty->hw_stopped = 1;
1299 cy_writeb(base_addr + (CySRER << index),
1300 readb(base_addr + (CySRER << index)) &
1305 /* if (mdm_change & CyDSR) {
1307 if (mdm_change & CyRI) {
1310 /* end of service */
1311 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312 cy_writeb(base_addr + (CyCAR << index), save_car);
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.
1319 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1322 struct cyclades_card *cinfo = dev_id;
1323 void __iomem *base_addr, *card_base_addr;
1324 unsigned int chip, too_many, had_work;
1327 if (unlikely(cinfo == NULL)) {
1328 #ifdef CY_DEBUG_INTERRUPTS
1329 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1332 return IRQ_NONE; /* spurious interrupt */
1335 card_base_addr = cinfo->base_addr;
1336 index = cinfo->bus_index;
1338 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339 if (unlikely(card_base_addr == NULL))
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.
1349 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350 base_addr = cinfo->base_addr +
1351 (cy_chip_offset[chip] << index);
1353 while ((status = readb(base_addr +
1354 (CySVRR << index))) != 0x00) {
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).
1361 if (1000 < too_many++)
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);
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);
1381 } /* cyy_interrupt */
1383 /***********************************************************/
1384 /********* End of block of Cyclom-Y specific code **********/
1385 /******** Start of block of Cyclades-Z specific code *******/
1386 /***********************************************************/
1389 cyz_fetch_msg(struct cyclades_card *cinfo,
1390 __u32 *channel, __u8 *cmd, __u32 *param)
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;
1397 firm_id = cinfo->base_addr + ID_ADDRESS;
1398 if (!ISZLOADED(*cinfo))
1400 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1401 board_ctrl = &zfw_ctrl->board_ctrl;
1403 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1404 (cinfo->ctl_addr))->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);
1414 } /* cyz_fetch_msg */
1417 cyz_issue_cmd(struct cyclades_card *cinfo,
1418 __u32 channel, __u8 cmd, __u32 param)
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;
1426 firm_id = cinfo->base_addr + ID_ADDRESS;
1427 if (!ISZLOADED(*cinfo))
1430 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1431 board_ctrl = &zfw_ctrl->board_ctrl;
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);
1441 cy_writel(&board_ctrl->hcmd_channel, channel);
1442 cy_writel(&board_ctrl->hcmd_param, param);
1443 cy_writel(pci_doorbell, (long)cmd);
1446 } /* cyz_issue_cmd */
1448 static void cyz_handle_rx(struct cyclades_port *info,
1449 struct BUF_CTRL __iomem *buf_ctrl)
1451 struct cyclades_card *cinfo = info->card;
1452 struct tty_struct *tty = info->tty;
1453 unsigned int char_count;
1460 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
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;
1469 char_count = rx_put - rx_get + rx_bufsize;
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;
1480 /* flush received characters */
1481 new_rx_get = (new_rx_get + char_count) &
1483 info->rflush_count++;
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 */
1490 len = tty_prepare_flip_string(tty, &buf,
1495 len = min_t(unsigned int, min(len, char_count),
1496 rx_bufsize - new_rx_get);
1498 memcpy_fromio(buf, cinfo->base_addr +
1499 rx_bufaddr + new_rx_get, len);
1501 new_rx_get = (new_rx_get + len) &
1504 info->icount.rx += len;
1505 info->idle_stats.recv_bytes += len;
1508 len = tty_buffer_request_room(tty, char_count);
1510 data = readb(cinfo->base_addr + rx_bufaddr +
1512 new_rx_get = (new_rx_get + 1) &
1514 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515 info->idle_stats.recv_bytes++;
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;
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[
1530 mod_timer(&cyz_rx_full_timer[info->line],
1533 info->idle_stats.recv_idle = jiffies;
1534 tty_schedule_flip(tty);
1537 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1541 static void cyz_handle_tx(struct cyclades_port *info,
1542 struct BUF_CTRL __iomem *buf_ctrl)
1544 struct cyclades_card *cinfo = info->card;
1545 struct tty_struct *tty = info->tty;
1547 unsigned int char_count;
1551 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1553 if (info->xmit_cnt <= 0) /* Nothing to transmit */
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;
1563 char_count = tx_get - tx_put - 1;
1570 if (info->x_char) { /* send special char */
1571 data = info->x_char;
1573 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574 tx_put = (tx_put + 1) & (tx_bufsize - 1);
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,
1586 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1588 &info->xmit_buf[info->xmit_tail],
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);
1599 while (info->xmit_cnt && char_count) {
1600 data = info->xmit_buf[info->xmit_tail];
1602 info->xmit_tail = (info->xmit_tail + 1) &
1603 (SERIAL_XMIT_SIZE - 1);
1605 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1614 cy_writel(&buf_ctrl->tx_put, tx_put);
1618 static void cyz_handle_cmd(struct cyclades_card *cinfo)
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;
1630 __u32 hw_ver, fw_ver;
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))->
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1644 info = &cinfo->ports[channel];
1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1671 if (info->flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
1673 readl(&ch_ctrl->rs_status)) &
1675 wake_up_interruptible(&info->open_wait);
1677 tty_hangup(info->tty);
1678 wake_up_interruptible(&info->open_wait);
1679 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1697 complete(&info->shutdown_wait);
1700 #ifdef CONFIG_CYZ_INTR
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);
1709 cyz_handle_rx(info, buf_ctrl);
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);
1719 cyz_handle_tx(info, buf_ctrl);
1721 #endif /* CONFIG_CYZ_INTR */
1723 /* should do something with this !!! */
1729 wake_up_interruptible(&info->delta_msr_wait);
1731 tty_schedule_flip(tty);
1735 #ifdef CONFIG_CYZ_INTR
1736 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1738 struct cyclades_card *cinfo = dev_id;
1740 if (unlikely(cinfo == NULL)) {
1741 #ifdef CY_DEBUG_INTERRUPTS
1742 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1745 return IRQ_NONE; /* spurious interrupt */
1748 if (unlikely(!ISZLOADED(*cinfo))) {
1749 #ifdef CY_DEBUG_INTERRUPTS
1750 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1756 /* Handle the interrupts */
1757 cyz_handle_cmd(cinfo);
1760 } /* cyz_interrupt */
1762 static void cyz_rx_restart(unsigned long arg)
1764 struct cyclades_port *info = (struct cyclades_port *)arg;
1765 struct cyclades_card *card = info->card;
1767 __u32 channel = info->line - card->first_line;
1768 unsigned long flags;
1770 spin_lock_irqsave(&card->card_lock, flags);
1771 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1773 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1774 info->line, retval);
1776 spin_unlock_irqrestore(&card->card_lock, flags);
1779 #else /* CONFIG_CYZ_INTR */
1781 static void cyz_poll(unsigned long arg)
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;
1793 for (card = 0; card < NR_CARDS; card++) {
1794 cinfo = &cy_card[card];
1796 if (!IS_CYC_Z(*cinfo))
1798 if (!ISZLOADED(*cinfo))
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);
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;
1813 cyz_handle_cmd(cinfo);
1815 for (port = 0; port < cinfo->nports; port++) {
1816 info = &cinfo->ports[port];
1818 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1820 if (!info->throttle)
1821 cyz_handle_rx(info, buf_ctrl);
1822 cyz_handle_tx(info, buf_ctrl);
1824 /* poll every 'cyz_polling_cycle' period */
1825 expires = jiffies + cyz_polling_cycle;
1827 mod_timer(&cyz_timerlist, expires);
1830 #endif /* CONFIG_CYZ_INTR */
1832 /********** End of block of Cyclades-Z specific code *********/
1833 /***********************************************************/
1835 /* This is called whenever a port becomes active;
1836 interrupts are enabled and DTR & RTS are turned on.
1838 static int startup(struct cyclades_port *info)
1840 struct cyclades_card *card;
1841 unsigned long flags;
1843 void __iomem *base_addr;
1844 int chip, channel, index;
1848 channel = info->line - card->first_line;
1850 page = get_zeroed_page(GFP_KERNEL);
1854 spin_lock_irqsave(&card->card_lock, flags);
1856 if (info->flags & ASYNC_INITIALIZED) {
1863 set_bit(TTY_IO_ERROR, &info->tty->flags);
1871 info->xmit_buf = (unsigned char *)page;
1873 spin_unlock_irqrestore(&card->card_lock, flags);
1875 set_line_char(info);
1877 if (!IS_CYC_Z(*card)) {
1878 chip = channel >> 2;
1880 index = card->bus_index;
1881 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1883 #ifdef CY_DEBUG_OPEN
1884 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1886 card, chip, channel, base_addr);
1888 spin_lock_irqsave(&card->card_lock, flags);
1890 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1892 cy_writeb(base_addr + (CyRTPR << index),
1893 (info->default_timeout ? info->default_timeout : 0x02));
1894 /* 10ms rx timeout */
1896 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
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);
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)));
1910 cy_writeb(base_addr + (CySRER << index),
1911 readb(base_addr + (CySRER << index)) | CyRxData);
1912 info->flags |= ASYNC_INITIALIZED;
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;
1923 spin_unlock_irqrestore(&card->card_lock, flags);
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;
1931 base_addr = card->base_addr;
1933 firm_id = base_addr + ID_ADDRESS;
1934 if (!ISZLOADED(*card))
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;
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);
1946 spin_lock_irqsave(&card->card_lock, flags);
1948 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
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);
1955 cy_writel(&ch_ctrl[channel].intr_enable,
1956 C_IN_IOCTLW | C_IN_MDCD);
1957 #endif /* CONFIG_CYZ_INTR */
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);
1964 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1965 #endif /* CONFIG_CYZ_INTR */
1968 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1970 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1971 "%x\n", info->line, retval);
1974 /* Flush RX buffers before raising DTR and RTS */
1975 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1977 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1978 "%x\n", info->line, retval);
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 |
1986 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
1988 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1989 "%x\n", info->line, retval);
1992 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1995 /* enable send, recv, modem !!! */
1997 info->flags |= ASYNC_INITIALIZED;
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;
2007 spin_unlock_irqrestore(&card->card_lock, flags);
2010 #ifdef CY_DEBUG_OPEN
2011 printk(KERN_DEBUG "cyc startup done\n");
2016 spin_unlock_irqrestore(&card->card_lock, flags);
2020 static void start_xmit(struct cyclades_port *info)
2022 struct cyclades_card *card;
2023 unsigned long flags;
2024 void __iomem *base_addr;
2025 int chip, channel, index;
2028 channel = info->line - card->first_line;
2029 if (!IS_CYC_Z(*card)) {
2030 chip = channel >> 2;
2032 index = card->bus_index;
2033 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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);
2041 #ifdef CONFIG_CYZ_INTR
2044 spin_lock_irqsave(&card->card_lock, flags);
2045 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2047 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2048 "%x\n", info->line, retval);
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 */
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.
2061 static void shutdown(struct cyclades_port *info)
2063 struct cyclades_card *card;
2064 unsigned long flags;
2065 void __iomem *base_addr;
2066 int chip, channel, index;
2068 if (!(info->flags & ASYNC_INITIALIZED))
2072 channel = info->line - card->first_line;
2073 if (!IS_CYC_Z(*card)) {
2074 chip = channel >> 2;
2076 index = card->bus_index;
2077 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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);
2085 spin_lock_irqsave(&card->card_lock, flags);
2087 /* Clear delta_msr_wait queue to avoid mem leaks. */
2088 wake_up_interruptible(&info->delta_msr_wait);
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);
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);
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)));
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)!!! */
2112 set_bit(TTY_IO_ERROR, &info->tty->flags);
2113 info->flags &= ~ASYNC_INITIALIZED;
2114 spin_unlock_irqrestore(&card->card_lock, flags);
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;
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);
2128 firm_id = base_addr + ID_ADDRESS;
2129 if (!ISZLOADED(*card))
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;
2137 spin_lock_irqsave(&card->card_lock, flags);
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);
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,
2153 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2154 "was %x\n", info->line, retval);
2157 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2162 set_bit(TTY_IO_ERROR, &info->tty->flags);
2163 info->flags &= ~ASYNC_INITIALIZED;
2165 spin_unlock_irqrestore(&card->card_lock, flags);
2168 #ifdef CY_DEBUG_OPEN
2169 printk(KERN_DEBUG "cyc shutdown done\n");
2174 * ------------------------------------------------------------
2175 * cy_open() and friends
2176 * ------------------------------------------------------------
2180 block_til_ready(struct tty_struct *tty, struct file *filp,
2181 struct cyclades_port *info)
2183 DECLARE_WAITQUEUE(wait, current);
2184 struct cyclades_card *cinfo;
2185 unsigned long flags;
2186 int chip, channel, index;
2188 void __iomem *base_addr;
2191 channel = info->line - cinfo->first_line;
2194 * If the device is in the middle of being closed, then block
2195 * until it's done, and then try again.
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;
2204 * If non-blocking mode is set, then make the check up front
2207 if ((filp->f_flags & O_NONBLOCK) ||
2208 (tty->flags & (1 << TTY_IO_ERROR))) {
2209 info->flags |= ASYNC_NORMAL_ACTIVE;
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.
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);
2226 spin_lock_irqsave(&cinfo->card_lock, flags);
2227 if (!tty_hung_up_p(filp))
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);
2234 info->blocked_open++;
2236 if (!IS_CYC_Z(*cinfo)) {
2237 chip = channel >> 2;
2239 index = cinfo->bus_index;
2240 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2243 spin_lock_irqsave(&cinfo->card_lock, flags);
2244 if ((tty->termios->c_cflag & CBAUD)) {
2245 cy_writeb(base_addr + (CyCAR << index),
2247 cy_writeb(base_addr + (CyMSVR1 << index),
2249 cy_writeb(base_addr + (CyMSVR2 << index),
2252 printk(KERN_DEBUG "cyc:block_til_ready raising "
2254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
2255 readb(base_addr + (CyMSVR1 << index)),
2256 readb(base_addr + (CyMSVR2 << index)));
2259 spin_unlock_irqrestore(&cinfo->card_lock, flags);
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);
2269 spin_lock_irqsave(&cinfo->card_lock, flags);
2270 cy_writeb(base_addr + (CyCAR << index),
2272 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2274 (CyMSVR1 << index)) & CyDCD))) {
2275 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2278 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2280 if (signal_pending(current)) {
2281 retval = -ERESTARTSYS;
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);
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;
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);
2305 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2307 board_ctrl = &zfw_ctrl->board_ctrl;
2308 ch_ctrl = zfw_ctrl->ch_ctrl;
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);
2318 printk(KERN_ERR "cyc:block_til_ready "
2319 "retval on ttyC%d was %x\n",
2320 info->line, retval);
2323 printk(KERN_DEBUG "cyc:block_til_ready raising "
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);
2335 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2336 (readl(&ch_ctrl[channel].rs_status) &
2340 if (signal_pending(current)) {
2341 retval = -ERESTARTSYS;
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);
2352 __set_current_state(TASK_RUNNING);
2353 remove_wait_queue(&info->open_wait, &wait);
2354 if (!tty_hung_up_p(filp)) {
2356 #ifdef CY_DEBUG_COUNT
2357 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2358 "count to %d\n", current->pid, info->count);
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);
2368 info->flags |= ASYNC_NORMAL_ACTIVE;
2370 } /* block_til_ready */
2373 * This routine is called whenever a serial port is opened. It
2374 * performs the serial-specific initialization for the tty structure.
2376 static int cy_open(struct tty_struct *tty, struct file *filp)
2378 struct cyclades_port *info;
2379 unsigned int i, line;
2383 if (tty->index < 0 || NR_PORTS <= line)
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)
2392 info = &cy_card[i].ports[line - cy_card[i].first_line];
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.
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;
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 "
2415 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2420 #ifdef CONFIG_CYZ_INTR
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;
2429 zfw_ctrl = cinfo->base_addr +
2430 (readl(&firm_id->zfwctrl_addr) &
2433 board_ctrl = &zfw_ctrl->board_ctrl;
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,
2442 printk(KERN_ERR "cyc:IRQ enable retval "
2443 "was %x\n", retval);
2446 (int)readl(&board_ctrl->n_channel);
2447 cinfo->intr_enabled = 1;
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))
2455 #ifdef CY_DEBUG_OTHER
2456 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2458 tty->driver_data = info;
2460 if (serial_paranoia_check(info, tty->name, "cy_open"))
2463 #ifdef CY_DEBUG_OPEN
2464 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2468 #ifdef CY_DEBUG_COUNT
2469 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2470 current->pid, info->count);
2474 * If the port is the middle of closing, bail out now
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;
2483 * Start up serial port
2485 retval = startup(info);
2489 retval = block_til_ready(tty, filp, info);
2491 #ifdef CY_DEBUG_OPEN
2492 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2493 "with %d\n", retval);
2500 #ifdef CY_DEBUG_OPEN
2501 printk(KERN_DEBUG "cyc:cy_open done\n");
2507 * cy_wait_until_sent() --- wait until the transmitter is empty
2509 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
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;
2518 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2521 if (info->xmit_fifo_size == 0)
2522 return; /* Just in case.... */
2524 orig_jiffies = jiffies;
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.
2530 * Note: we have to use pretty tight timings here to satisfy
2533 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2534 char_time = char_time / 5;
2540 char_time = min(char_time, timeout);
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
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);
2557 channel = (info->line) - (card->first_line);
2558 if (!IS_CYC_Z(*card)) {
2559 chip = channel >> 2;
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);
2567 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2569 if (timeout && time_after(jiffies, orig_jiffies +
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);
2582 * This routine is called when a particular tty device is closed.
2584 static void cy_close(struct tty_struct *tty, struct file *filp)
2586 struct cyclades_port *info = tty->driver_data;
2587 struct cyclades_card *card;
2588 unsigned long flags;
2590 #ifdef CY_DEBUG_OTHER
2591 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2594 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
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);
2605 #ifdef CY_DEBUG_OPEN
2606 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2609 if ((tty->count == 1) && (info->count != 1)) {
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.
2617 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2618 "tty->count is 1, info->count is %d\n", info->count);
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);
2625 if (--info->count < 0) {
2626 #ifdef CY_DEBUG_COUNT
2627 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2632 spin_unlock_irqrestore(&card->card_lock, flags);
2635 info->flags |= ASYNC_CLOSING;
2638 * Now we wait for the transmit buffer to clear; and we notify
2639 * the line discipline to only process XON/XOFF characters.
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);
2646 spin_lock_irqsave(&card->card_lock, flags);
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 */
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
2661 spin_unlock_irqrestore(&card->card_lock, flags);
2662 cy_wait_until_sent(tty, info->timeout);
2663 spin_lock_irqsave(&card->card_lock, flags);
2667 /* Waiting for on-board buffers to be empty before closing
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;
2677 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2678 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2680 printk(KERN_DEBUG "cyc:cy_close retval on "
2681 "ttyC%d was %x\n", info->line, retval);
2683 spin_unlock_irqrestore(&card->card_lock, flags);
2684 wait_for_completion_interruptible(&info->shutdown_wait);
2685 spin_lock_irqsave(&card->card_lock, flags);
2690 spin_unlock_irqrestore(&card->card_lock, flags);
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);
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));
2705 wake_up_interruptible(&info->open_wait);
2706 spin_lock_irqsave(&card->card_lock, flags);
2708 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2709 wake_up_interruptible(&info->close_wait);
2711 #ifdef CY_DEBUG_OTHER
2712 printk(KERN_DEBUG "cyc:cy_close done\n");
2715 spin_unlock_irqrestore(&card->card_lock, flags);
2718 /* This routine gets called when tty_write has put something into
2719 * the write_queue. The characters may come from user space or
2722 * This routine will return the number of characters actually
2723 * accepted for writing.
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.
2731 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2733 struct cyclades_port *info = tty->driver_data;
2734 unsigned long flags;
2738 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2741 if (serial_paranoia_check(info, tty->name, "cy_write"))
2744 if (!info->xmit_buf)
2747 spin_lock_irqsave(&info->card->card_lock, flags);
2749 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2750 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
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;
2763 spin_unlock_irqrestore(&info->card->card_lock, flags);
2765 info->idle_stats.xmit_bytes += ret;
2766 info->idle_stats.xmit_idle = jiffies;
2768 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
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.
2781 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2783 struct cyclades_port *info = tty->driver_data;
2784 unsigned long flags;
2787 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2790 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2793 if (!info->xmit_buf)
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);
2802 info->xmit_buf[info->xmit_head++] = ch;
2803 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2805 info->idle_stats.xmit_bytes++;
2806 info->idle_stats.xmit_idle = jiffies;
2807 spin_unlock_irqrestore(&info->card->card_lock, flags);
2811 * This routine is called by the kernel after it has written a
2812 * series of characters to the tty device using put_char().
2814 static void cy_flush_chars(struct tty_struct *tty)
2816 struct cyclades_port *info = tty->driver_data;
2819 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2822 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2825 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2830 } /* cy_flush_chars */
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.
2838 static int cy_write_room(struct tty_struct *tty)
2840 struct cyclades_port *info = tty->driver_data;
2844 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2847 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2849 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2853 } /* cy_write_room */
2855 static int cy_chars_in_buffer(struct tty_struct *tty)
2857 struct cyclades_card *card;
2858 struct cyclades_port *info = tty->driver_data;
2861 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2865 channel = (info->line) - (card->first_line);
2867 #ifdef Z_EXT_CHARS_IN_BUFFER
2868 if (!IS_CYC_Z(cy_card[card])) {
2869 #endif /* Z_EXT_CHARS_IN_BUFFER */
2871 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2872 info->line, info->xmit_cnt);
2874 return info->xmit_cnt;
2875 #ifdef Z_EXT_CHARS_IN_BUFFER
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;
2882 __u32 tx_put, tx_get, tx_bufsize;
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]);
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;
2896 char_count = tx_put - tx_get + tx_bufsize;
2898 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2899 info->line, info->xmit_cnt + char_count);
2901 return info->xmit_cnt + char_count;
2903 #endif /* Z_EXT_CHARS_IN_BUFFER */
2904 } /* cy_chars_in_buffer */
2907 * ------------------------------------------------------------
2908 * cy_ioctl() and friends
2909 * ------------------------------------------------------------
2912 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
2914 int co, co_val, bpr;
2915 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2919 info->tbpr = info->tco = info->rbpr = info->rco = 0;
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)
2929 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2933 info->tbpr = info->rbpr = bpr;
2934 info->tco = info->rco = co;
2938 * This routine finds or computes the various line characteristics.
2939 * It used to be called config_setup
2941 static void set_line_char(struct cyclades_port *info)
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;
2952 if (!info->tty || !info->tty->termios)
2955 if (info->line == -1)
2958 cflag = info->tty->termios->c_cflag;
2959 iflag = info->tty->termios->c_iflag;
2962 * Set up the tty->alt_speed kludge
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;
2976 channel = info->line - card->first_line;
2977 chip_number = channel / 4;
2979 if (!IS_CYC_Z(*card)) {
2981 index = card->bus_index;
2984 baud = tty_get_baud_rate(info->tty);
2985 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
2987 if (info->custom_divisor)
2988 baud_rate = info->baud / info->custom_divisor;
2990 baud_rate = info->baud;
2991 } else if (baud > CD1400_MAX_SPEED) {
2992 baud = CD1400_MAX_SPEED;
2994 /* find the baud index */
2995 for (i = 0; i < 20; i++) {
2996 if (baud == baud_table[i])
3000 i = 19; /* CD1400_MAX_SPEED */
3002 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3004 cyy_baud_calc(info, baud_rate);
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 */
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 */
3019 if (baud_table[i] == 134) {
3020 /* get it right for 134.5 baud */
3021 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3023 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3025 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3027 } else if (baud_table[i]) {
3028 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3030 /* this needs to be propagated into the card info */
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. */
3038 /* byte size and parity */
3041 /* receive threshold */
3042 info->cor3 = (info->default_threshold ?
3043 info->default_threshold : baud_cor3[i]);
3045 switch (cflag & CSIZE) {
3047 info->cor1 = Cy_5_BITS;
3050 info->cor1 = Cy_6_BITS;
3053 info->cor1 = Cy_7_BITS;
3056 info->cor1 = Cy_8_BITS;
3060 info->cor1 |= Cy_2_STOP;
3062 if (cflag & PARENB) {
3064 info->cor1 |= CyPARITY_O;
3066 info->cor1 |= CyPARITY_E;
3068 info->cor1 |= CyPARITY_NONE;
3070 /* CTS flow control flag */
3071 if (cflag & CRTSCTS) {
3072 info->flags |= ASYNC_CTS_FLOW;
3073 info->cor2 |= CyCtsAE;
3075 info->flags &= ~ASYNC_CTS_FLOW;
3076 info->cor2 &= ~CyCtsAE;
3079 info->flags &= ~ASYNC_CHECK_CD;
3081 info->flags |= ASYNC_CHECK_CD;
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 ***********************************************/
3093 chip = channel >> 2;
3095 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3097 spin_lock_irqsave(&card->card_lock, flags);
3098 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3100 /* tx and rx baud rate */
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);
3107 /* set line characteristics according configuration */
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);
3118 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
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 */
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]));
3136 cy_writeb(base_addr + (CyMCOR1 << index),
3139 /* act on 0->1 modem transitions */
3140 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3142 /* without modem intr */
3143 cy_writeb(base_addr + (CySRER << index),
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 |
3152 cy_writeb(base_addr + (CyMCOR1 << index),
3153 CyDSR | CyCTS | CyRI | CyDCD);
3155 /* act on 0->1 modem transitions */
3156 cy_writeb(base_addr + (CyMCOR2 << index),
3157 CyDSR | CyCTS | CyRI | CyDCD);
3160 if (i == 0) { /* baud rate is zero, turn off line */
3161 if (info->rtsdtr_inv) {
3162 cy_writeb(base_addr + (CyMSVR1 << index),
3165 cy_writeb(base_addr + (CyMSVR2 << index),
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)));
3175 if (info->rtsdtr_inv) {
3176 cy_writeb(base_addr + (CyMSVR1 << index),
3179 cy_writeb(base_addr + (CyMSVR2 << index),
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)));
3191 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3192 spin_unlock_irqrestore(&card->card_lock, flags);
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;
3203 firm_id = card->base_addr + ID_ADDRESS;
3204 if (!ISZLOADED(*card))
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];
3214 baud = tty_get_baud_rate(info->tty);
3215 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3217 if (info->custom_divisor)
3218 baud_rate = info->baud / info->custom_divisor;
3220 baud_rate = info->baud;
3221 } else if (baud > CYZ_MAX_SPEED) {
3222 baud = CYZ_MAX_SPEED;
3224 cy_writel(&ch_ctrl->comm_baud, baud);
3227 /* get it right for 134.5 baud */
3228 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3230 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3232 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3235 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3237 /* this needs to be propagated into the card info */
3242 /* byte size and parity */
3243 switch (cflag & CSIZE) {
3245 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3248 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3251 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3254 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3257 if (cflag & CSTOPB) {
3258 cy_writel(&ch_ctrl->comm_data_l,
3259 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3261 cy_writel(&ch_ctrl->comm_data_l,
3262 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3264 if (cflag & PARENB) {
3266 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3268 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3270 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
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);
3277 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3278 ~(C_RS_CTS | C_RS_RTS));
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;
3284 /* XON/XOFF/XANY flow control flags */
3287 sw_flow |= C_FL_OXX;
3289 sw_flow |= C_FL_OIXANY;
3291 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3293 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3295 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3296 "was %x\n", info->line, retval);
3299 /* CD sensitivity */
3301 info->flags &= ~ASYNC_CHECK_CD;
3303 info->flags |= ASYNC_CHECK_CD;
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);
3309 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3312 cy_writel(&ch_ctrl->rs_control,
3313 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3315 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3319 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3321 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3322 "was %x\n", info->line, retval);
3326 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3328 } /* set_line_char */
3331 get_serial_info(struct cyclades_port *info,
3332 struct serial_struct __user *retinfo)
3334 struct serial_struct tmp;
3335 struct cyclades_card *cinfo = info->card;
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 -
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 */
3355 set_serial_info(struct cyclades_port *info,
3356 struct serial_struct __user *new_info)
3358 struct serial_struct new_serial;
3359 struct cyclades_port old_info;
3361 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
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 &
3370 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
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;
3380 * OK, past this point, all the error checking has been done.
3381 * At this point, we start making changes.....
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;
3392 if (info->flags & ASYNC_INITIALIZED) {
3393 set_line_char(info);
3396 return startup(info);
3398 } /* set_serial_info */
3401 * get_lsr_info - get line status register info
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.
3410 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
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;
3420 channel = (info->line) - (card->first_line);
3421 if (!IS_CYC_Z(*card)) {
3422 chip = channel >> 2;
3424 index = card->bus_index;
3425 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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);
3433 /* Not supported yet */
3436 return put_user(result, (unsigned long __user *)value);
3439 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
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;
3454 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3460 channel = info->line - card->first_line;
3461 if (!IS_CYC_Z(*card)) {
3462 chip = channel >> 2;
3464 index = card->bus_index;
3465 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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);
3473 if (info->rtsdtr_inv) {
3474 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3475 ((status & CyDTR) ? TIOCM_RTS : 0);
3477 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3478 ((status & CyDTR) ? TIOCM_DTR : 0);
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);
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);
3511 cy_tiocmset(struct tty_struct *tty, struct file *file,
3512 unsigned int set, unsigned int clear)
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;
3525 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3529 channel = (info->line) - (card->first_line);
3530 if (!IS_CYC_Z(*card)) {
3531 chip = channel >> 2;
3533 index = card->bus_index;
3534 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3536 if (set & TIOCM_RTS) {
3537 spin_lock_irqsave(&card->card_lock, flags);
3538 cy_writeb(base_addr + (CyCAR << index),
3540 if (info->rtsdtr_inv) {
3541 cy_writeb(base_addr + (CyMSVR2 << index),
3544 cy_writeb(base_addr + (CyMSVR1 << index),
3547 spin_unlock_irqrestore(&card->card_lock, flags);
3549 if (clear & TIOCM_RTS) {
3550 spin_lock_irqsave(&card->card_lock, flags);
3551 cy_writeb(base_addr + (CyCAR << index),
3553 if (info->rtsdtr_inv) {
3554 cy_writeb(base_addr + (CyMSVR2 << index),
3557 cy_writeb(base_addr + (CyMSVR1 << index),
3560 spin_unlock_irqrestore(&card->card_lock, flags);
3562 if (set & TIOCM_DTR) {
3563 spin_lock_irqsave(&card->card_lock, flags);
3564 cy_writeb(base_addr + (CyCAR << index),
3566 if (info->rtsdtr_inv) {
3567 cy_writeb(base_addr + (CyMSVR1 << index),
3570 cy_writeb(base_addr + (CyMSVR2 << index),
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)));
3579 spin_unlock_irqrestore(&card->card_lock, flags);
3581 if (clear & TIOCM_DTR) {
3582 spin_lock_irqsave(&card->card_lock, flags);
3583 cy_writeb(base_addr + (CyCAR << index),
3585 if (info->rtsdtr_inv) {
3586 cy_writeb(base_addr + (CyMSVR1 << index),
3589 cy_writeb(base_addr + (CyMSVR2 << index),
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)));
3599 spin_unlock_irqrestore(&card->card_lock, flags);
3602 base_addr = card->base_addr;
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;
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) |
3616 spin_unlock_irqrestore(&card->card_lock, flags);
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) &
3623 spin_unlock_irqrestore(&card->card_lock, flags);
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) |
3631 printk(KERN_DEBUG "cyc:set_modem_info raising "
3634 spin_unlock_irqrestore(&card->card_lock, flags);
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) &
3642 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3645 spin_unlock_irqrestore(&card->card_lock, flags);
3650 spin_lock_irqsave(&card->card_lock, flags);
3651 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3653 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3654 "was %x\n", info->line, retval);
3656 spin_unlock_irqrestore(&card->card_lock, flags);
3662 * cy_break() --- routine which turns the break handling on or off
3664 static void cy_break(struct tty_struct *tty, int break_state)
3666 struct cyclades_port *info = tty->driver_data;
3667 struct cyclades_card *card;
3668 unsigned long flags;
3670 if (serial_paranoia_check(info, tty->name, "cy_break"))
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).
3680 if (break_state == -1) {
3681 if (!info->breakon) {
3683 if (!info->xmit_cnt) {
3684 spin_unlock_irqrestore(&card->card_lock, flags);
3686 spin_lock_irqsave(&card->card_lock, flags);
3690 if (!info->breakoff) {
3692 if (!info->xmit_cnt) {
3693 spin_unlock_irqrestore(&card->card_lock, flags);
3695 spin_lock_irqsave(&card->card_lock, flags);
3702 if (break_state == -1) {
3703 retval = cyz_issue_cmd(card,
3704 info->line - card->first_line,
3705 C_CM_SET_BREAK, 0L);
3707 printk(KERN_ERR "cyc:cy_break (set) retval on "
3708 "ttyC%d was %x\n", info->line, retval);
3711 retval = cyz_issue_cmd(card,
3712 info->line - card->first_line,
3713 C_CM_CLR_BREAK, 0L);
3715 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3716 "on ttyC%d was %x\n", info->line,
3721 spin_unlock_irqrestore(&card->card_lock, flags);
3724 static int get_mon_info(struct cyclades_port *info,
3725 struct cyclades_monitor __user *mon)
3728 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3730 info->mon.int_count = 0;
3731 info->mon.char_count = 0;
3732 info->mon.char_max = 0;
3733 info->mon.char_last = 0;
3735 } /* get_mon_info */
3737 static int set_threshold(struct cyclades_port *info, unsigned long value)
3739 struct cyclades_card *card;
3740 void __iomem *base_addr;
3741 int channel, chip, index;
3742 unsigned long flags;
3745 channel = info->line - card->first_line;
3746 if (!IS_CYC_Z(*card)) {
3747 chip = channel >> 2;
3749 index = card->bus_index;
3751 card->base_addr + (cy_chip_offset[chip] << index);
3753 info->cor3 &= ~CyREC_FIFO;
3754 info->cor3 |= value & CyREC_FIFO;
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);
3762 } /* set_threshold */
3764 static int get_threshold(struct cyclades_port *info,
3765 unsigned long __user *value)
3767 struct cyclades_card *card;
3768 void __iomem *base_addr;
3769 int channel, chip, index;
3773 channel = info->line - card->first_line;
3774 if (!IS_CYC_Z(*card)) {
3775 chip = channel >> 2;
3777 index = card->bus_index;
3778 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3780 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3781 return put_user(tmp, value);
3784 } /* get_threshold */
3786 static int set_default_threshold(struct cyclades_port *info,
3787 unsigned long value)
3789 info->default_threshold = value & 0x0f;
3791 } /* set_default_threshold */
3793 static int get_default_threshold(struct cyclades_port *info,
3794 unsigned long __user *value)
3796 return put_user(info->default_threshold, value);
3797 } /* get_default_threshold */
3799 static int set_timeout(struct cyclades_port *info, unsigned long value)
3801 struct cyclades_card *card;
3802 void __iomem *base_addr;
3803 int channel, chip, index;
3804 unsigned long flags;
3807 channel = info->line - card->first_line;
3808 if (!IS_CYC_Z(*card)) {
3809 chip = channel >> 2;
3811 index = card->bus_index;
3812 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
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);
3821 static int get_timeout(struct cyclades_port *info,
3822 unsigned long __user *value)
3824 struct cyclades_card *card;
3825 void __iomem *base_addr;
3826 int channel, chip, index;
3830 channel = info->line - card->first_line;
3831 if (!IS_CYC_Z(*card)) {
3832 chip = channel >> 2;
3834 index = card->bus_index;
3835 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3837 tmp = readb(base_addr + (CyRTPR << index));
3838 return put_user(tmp, value);
3843 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3845 info->default_timeout = value & 0xff;
3847 } /* set_default_timeout */
3849 static int get_default_timeout(struct cyclades_port *info,
3850 unsigned long __user *value)
3852 return put_user(info->default_timeout, value);
3853 } /* get_default_timeout */
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.
3861 cy_ioctl(struct tty_struct *tty, struct file *file,
3862 unsigned int cmd, unsigned long arg)
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 */
3868 unsigned long flags;
3869 void __user *argp = (void __user *)arg;
3871 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3874 #ifdef CY_DEBUG_OTHER
3875 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3876 info->line, cmd, arg);
3882 ret_val = get_mon_info(info, argp);
3885 ret_val = get_threshold(info, argp);
3888 ret_val = set_threshold(info, arg);
3890 case CYGETDEFTHRESH:
3891 ret_val = get_default_threshold(info, argp);
3893 case CYSETDEFTHRESH:
3894 ret_val = set_default_threshold(info, arg);
3897 ret_val = get_timeout(info, argp);
3900 ret_val = set_timeout(info, arg);
3902 case CYGETDEFTIMEOUT:
3903 ret_val = get_default_timeout(info, argp);
3905 case CYSETDEFTIMEOUT:
3906 ret_val = set_default_timeout(info, arg);
3909 info->rflow = (int)arg;
3913 ret_val = info->rflow;
3915 case CYSETRTSDTR_INV:
3916 info->rtsdtr_inv = (int)arg;
3919 case CYGETRTSDTR_INV:
3920 ret_val = info->rtsdtr_inv;
3922 case CYGETCD1400VER:
3923 ret_val = info->chip_rev;
3925 #ifndef CONFIG_CYZ_INTR
3926 case CYZSETPOLLCYCLE:
3927 cyz_polling_cycle = (arg * HZ) / 1000;
3930 case CYZGETPOLLCYCLE:
3931 ret_val = (cyz_polling_cycle * 1000) / HZ;
3933 #endif /* CONFIG_CYZ_INTR */
3935 info->closing_wait = (unsigned short)arg * HZ / 100;
3939 ret_val = info->closing_wait / (HZ / 100);
3942 ret_val = get_serial_info(info, argp);
3945 ret_val = set_serial_info(info, argp);
3947 case TIOCSERGETLSR: /* Get line status register */
3948 ret_val = get_lsr_info(info, argp);
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
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, ({
3963 spin_lock_irqsave(&info->card->card_lock, flags);
3964 cnow = info->icount; /* atomic copy */
3965 spin_unlock_irqrestore(&info->card->card_lock, flags);
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));
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.
3981 spin_lock_irqsave(&info->card->card_lock, flags);
3982 cnow = info->icount;
3983 spin_unlock_irqrestore(&info->card->card_lock, flags);
3985 ret_val = put_user(cnow.cts, &p_cuser->cts);
3988 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
3991 ret_val = put_user(cnow.rng, &p_cuser->rng);
3994 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
3997 ret_val = put_user(cnow.rx, &p_cuser->rx);
4000 ret_val = put_user(cnow.tx, &p_cuser->tx);
4003 ret_val = put_user(cnow.frame, &p_cuser->frame);
4006 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4009 ret_val = put_user(cnow.parity, &p_cuser->parity);
4012 ret_val = put_user(cnow.brk, &p_cuser->brk);
4015 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4021 ret_val = -ENOIOCTLCMD;
4025 #ifdef CY_DEBUG_OTHER
4026 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
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.
4037 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4039 struct cyclades_port *info = tty->driver_data;
4041 #ifdef CY_DEBUG_OTHER
4042 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4045 set_line_char(info);
4047 if ((old_termios->c_cflag & CRTSCTS) &&
4048 !(tty->termios->c_cflag & CRTSCTS)) {
4049 tty->hw_stopped = 0;
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.....
4059 if (!(old_termios->c_cflag & CLOCAL) &&
4060 (tty->termios->c_cflag & CLOCAL))
4061 wake_up_interruptible(&info->open_wait);
4063 } /* cy_set_termios */
4065 /* This function is used to send a high-priority XON/XOFF character to
4068 static void cy_send_xchar(struct tty_struct *tty, char ch)
4070 struct cyclades_port *info = tty->driver_data;
4071 struct cyclades_card *card;
4074 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4083 channel = info->line - card->first_line;
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);
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.
4097 static void cy_throttle(struct tty_struct *tty)
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;
4105 #ifdef CY_DEBUG_THROTTLE
4108 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4109 tty->ldisc.chars_in_buffer(tty), info->line);
4112 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
4118 if (!IS_CYC_Z(*card))
4119 cy_send_xchar(tty, STOP_CHAR(tty));
4124 if (tty->termios->c_cflag & CRTSCTS) {
4125 channel = info->line - card->first_line;
4126 if (!IS_CYC_Z(*card)) {
4127 chip = channel >> 2;
4129 index = card->bus_index;
4130 base_addr = card->base_addr +
4131 (cy_chip_offset[chip] << index);
4133 spin_lock_irqsave(&card->card_lock, flags);
4134 cy_writeb(base_addr + (CyCAR << index),
4136 if (info->rtsdtr_inv) {
4137 cy_writeb(base_addr + (CyMSVR2 << index),
4140 cy_writeb(base_addr + (CyMSVR1 << index),
4143 spin_unlock_irqrestore(&card->card_lock, flags);
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.
4155 static void cy_unthrottle(struct tty_struct *tty)
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;
4163 #ifdef CY_DEBUG_THROTTLE
4166 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4167 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
4170 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
4177 cy_send_xchar(tty, START_CHAR(tty));
4180 if (tty->termios->c_cflag & CRTSCTS) {
4182 channel = info->line - card->first_line;
4183 if (!IS_CYC_Z(*card)) {
4184 chip = channel >> 2;
4186 index = card->bus_index;
4187 base_addr = card->base_addr +
4188 (cy_chip_offset[chip] << index);
4190 spin_lock_irqsave(&card->card_lock, flags);
4191 cy_writeb(base_addr + (CyCAR << index),
4193 if (info->rtsdtr_inv) {
4194 cy_writeb(base_addr + (CyMSVR2 << index),
4197 cy_writeb(base_addr + (CyMSVR1 << index),
4200 spin_unlock_irqrestore(&card->card_lock, flags);
4205 } /* cy_unthrottle */
4207 /* cy_start and cy_stop provide software output flow control as a
4208 function of XON/XOFF, software CTS, and other such stuff.
4210 static void cy_stop(struct tty_struct *tty)
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;
4218 #ifdef CY_DEBUG_OTHER
4219 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4222 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4226 channel = info->line - cinfo->first_line;
4227 if (!IS_CYC_Z(*cinfo)) {
4228 index = cinfo->bus_index;
4229 chip = channel >> 2;
4231 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
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);
4242 static void cy_start(struct tty_struct *tty)
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;
4250 #ifdef CY_DEBUG_OTHER
4251 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4254 if (serial_paranoia_check(info, tty->name, "cy_start"))
4258 channel = info->line - cinfo->first_line;
4259 index = cinfo->bus_index;
4260 if (!IS_CYC_Z(*cinfo)) {
4261 chip = channel >> 2;
4263 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
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);
4274 static void cy_flush_buffer(struct tty_struct *tty)
4276 struct cyclades_port *info = tty->driver_data;
4277 struct cyclades_card *card;
4278 int channel, retval;
4279 unsigned long flags;
4282 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4285 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4289 channel = info->line - card->first_line;
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);
4295 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
4297 spin_lock_irqsave(&card->card_lock, flags);
4298 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4300 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4301 "was %x\n", info->line, retval);
4303 spin_unlock_irqrestore(&card->card_lock, flags);
4306 } /* cy_flush_buffer */
4309 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4311 static void cy_hangup(struct tty_struct *tty)
4313 struct cyclades_port *info = tty->driver_data;
4315 #ifdef CY_DEBUG_OTHER
4316 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4319 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4322 cy_flush_buffer(tty);
4325 #ifdef CY_DEBUG_COUNT
4326 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4330 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4331 wake_up_interruptible(&info->open_wait);
4335 * ---------------------------------------------------------------------
4336 * cy_init() and friends
4338 * cy_init() is called at boot-time to initialize the serial driver.
4339 * ---------------------------------------------------------------------
4342 static int __devinit cy_init_card(struct cyclades_card *cinfo)
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);
4350 spin_lock_init(&cinfo->card_lock);
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
4360 index = cinfo->bus_index;
4361 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4364 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4365 if (cinfo->ports == NULL) {
4366 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4371 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4373 info = &cinfo->ports[port - cinfo->first_line];
4374 info->magic = CYCLADES_MAGIC;
4377 info->flags = STD_COM_FLAGS;
4378 info->closing_wait = CLOSING_WAIT_DELAY;
4379 info->close_delay = 5 * HZ / 10;
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);
4386 if (IS_CYC_Z(*cinfo)) {
4387 info->type = PORT_STARTECH;
4388 if (mailbox == ZO_V1)
4389 info->xmit_fifo_size = CYZ_FIFO_SIZE;
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);
4397 info->type = PORT_CIRRUS;
4398 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4399 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4401 info->cor3 = 0x08; /* _very_ small rcv threshold */
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));
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;
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;
4422 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4423 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4428 #ifndef CONFIG_CYZ_INTR
4429 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4430 mod_timer(&cyz_timerlist, jiffies + 1);
4432 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
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,
4444 unsigned int chip_number;
4445 void __iomem *base_addr;
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 */
4453 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4456 true_base_addr + (cy_chip_offset[chip_number] << index);
4458 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4460 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4461 chip_number, (unsigned long)base_addr);
4466 cy_writeb(base_addr + (CyGFRCR << index), 0);
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.
4475 if (chip_number == 4 && readb(true_base_addr +
4476 (cy_chip_offset[0] << index) +
4477 (CyGFRCR << index)) == 0) {
4481 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4484 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4486 printk(" chip #%d at %#6lx is not responding ",
4487 chip_number, (unsigned long)base_addr);
4488 printk("(GFRCR stayed 0)\n",
4492 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4495 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4497 chip_number, (unsigned long)base_addr,
4498 base_addr[CyGFRCR<<index]);
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);
4510 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4514 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4515 chip_number, (unsigned long)base_addr,
4516 readb(base_addr+(CyGFRCR<<index)));
4520 } /* cyy_init_card */
4523 * ---------------------------------------------------------------------
4524 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4525 * sets global variables and return the number of ISA boards found.
4526 * ---------------------------------------------------------------------
4528 static int __init cy_detect_isa(void)
4531 unsigned short cy_isa_irq, nboard;
4532 void __iomem *cy_isa_address;
4533 unsigned short i, j, cy_isa_nchan;
4541 /* Check for module parameters */
4542 for (i = 0; i < NR_CARDS; i++) {
4543 if (maddr[i] || i) {
4545 cy_isa_addresses[i] = maddr[i];
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)
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 "
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);
4572 if (isparam && irq[i])
4573 cy_isa_irq = irq[i];
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);
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);
4594 /* fill the next cy_card structure available */
4595 for (j = 0; j < NR_CARDS; j++) {
4596 if (cy_card[j].base_addr == NULL)
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);
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);
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);
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);
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;
4647 #endif /* CONFIG_ISA */
4648 } /* cy_detect_isa */
4651 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4655 for (a = 0; a < size && *str; a++, str++)
4659 for (; a < size; a++, str++)
4666 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4669 for (; size > 0; size--) {
4670 cy_writel(fpga, *data++);
4675 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4676 struct RUNTIME_9060 __iomem *addr)
4679 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4681 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4683 /* Reload Config. Registers from EEPROM */
4684 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4686 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
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.
4692 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4695 static int __devinit __cyz_load_fw(const struct firmware *fw,
4696 const char *name, const u32 mailbox, void __iomem *base,
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));
4710 cs = ptr + h->config_offset;
4711 bs = ptr + h->block_offset;
4713 if ((void *)(cs + h->n_config) > ptr + len ||
4714 (void *)(bs + h->n_blocks) > ptr + len) {
4715 printk(BAD_FW "too short");
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");
4725 if (strncmp(name, h->name, sizeof(h->name))) {
4726 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
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");
4737 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4741 printk(BAD_FW "nothing appropriate\n");
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");
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)
4756 for (a = 0; a < c->n_blocks; a++) {
4757 b = &bs[c->block_list[a]];
4758 if (b->type == ZBLOCK_FPGA) {
4760 cyz_fpga_copy(fpga, ptr + b->file_offset,
4764 memcpy_toio(base + b->ram_offset,
4765 ptr + b->file_offset, b->size);
4772 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4773 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
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;
4780 u32 mailbox, status;
4784 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4786 dev_err(&pdev->dev, "can't get firmware\n");
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);
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");
4806 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4809 mailbox = readl(&ctl_addr->mail_box_0);
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);
4819 plx_init(pdev, irq, ctl_addr);
4823 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4827 if (!Z_FPGA_LOADED(ctl_addr)) {
4828 dev_err(&pdev->dev, "fw upload successful, but fw is "
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);
4841 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4842 cy_writeb(tmp, 255);
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);
4852 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4853 release_firmware(fw);
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);
4862 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
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 "
4872 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4873 "some more time\n", status);
4874 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4877 if (status != ZFIRM_ID) {
4878 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4879 "Giving up. (fid->signature = 0x%x)\n",
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 "
4886 if (Z_FPGA_LOADED(ctl_addr))
4887 plx_init(pdev, irq, ctl_addr);
4892 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4895 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
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));
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));
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");
4910 if (Z_FPGA_LOADED(ctl_addr))
4911 plx_init(pdev, irq, ctl_addr);
4913 dev_info(&pdev->dev, "Null number of ports detected. Board "
4919 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4920 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4923 Early firmware failed to start looking for commands.
4924 This enables firmware interrupts for those commands.
4926 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4928 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4931 plx_init(pdev, irq, ctl_addr);
4935 release_firmware(fw);
4940 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4941 const struct pci_device_id *ent)
4943 void __iomem *addr0 = NULL, *addr2 = NULL;
4944 char *card_name = NULL;
4946 unsigned int device_id, nchan = 0, card_no, i;
4947 unsigned char plx_ver;
4950 retval = pci_enable_device(pdev);
4952 dev_err(&pdev->dev, "cannot enable device\n");
4956 /* read PCI configuration area */
4958 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
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");
4968 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4969 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4975 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4976 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4978 pdev->resource[2].flags &= ~IORESOURCE_IO;
4981 retval = pci_request_regions(pdev, "cyclades");
4983 dev_err(&pdev->dev, "failed to reserve resources\n");
4988 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4989 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4990 card_name = "Cyclom-Y";
4992 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4993 if (addr0 == NULL) {
4994 dev_err(&pdev->dev, "can't remap ctl region\n");
4997 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4998 if (addr2 == NULL) {
4999 dev_err(&pdev->dev, "can't remap base region\n");
5003 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5005 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5006 "Serial-Modules\n");
5009 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5010 struct RUNTIME_9060 __iomem *ctl_addr;
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");
5018 /* Disable interrupts on the PLX before resetting it */
5019 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5021 plx_init(pdev, irq, addr0);
5023 mailbox = (u32)readl(&ctl_addr->mail_box_0);
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");
5032 if (mailbox == ZE_V1) {
5033 card_name = "Cyclades-Ze";
5035 readl(&ctl_addr->mail_box_0);
5036 nchan = ZE_V1_NPORTS;
5038 card_name = "Cyclades-8Zo";
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)->
5049 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5051 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5052 "Cyclades-Z board. FPGA not loaded\n");
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.
5059 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5060 cy_writel(addr2 + ID_ADDRESS, 0L);
5062 retval = cyz_load_fw(pdev, addr2, addr0, irq);
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. */
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");
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)
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");
5090 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5091 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5093 retval = request_irq(irq, cyy_interrupt,
5094 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5096 dev_err(&pdev->dev, "could not allocate IRQ\n");
5099 cy_card[card_no].num_chips = nchan / 4;
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",
5108 dev_err(&pdev->dev, "could not allocate IRQ\n");
5112 #endif /* CONFIG_CYZ_INTR */
5113 cy_card[card_no].num_chips = (unsigned int)-1;
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]);
5126 pci_set_drvdata(pdev, &cy_card[card_no]);
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;
5135 cy_writeb(addr0 + 0x4c, 0x43);
5140 default: /* Old boards, use PLX_9060 */
5141 plx_init(pdev, irq, addr0);
5142 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
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;
5155 cy_card[card_no].base_addr = NULL;
5156 free_irq(irq, &cy_card[card_no]);
5158 pci_iounmap(pdev, addr0);
5160 pci_iounmap(pdev, addr2);
5162 pci_release_regions(pdev);
5164 pci_disable_device(pdev);
5169 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5171 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5174 /* non-Z with old PLX */
5175 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5177 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5179 #ifndef CONFIG_CYZ_INTR
5180 if (!IS_CYC_Z(*cinfo))
5182 cy_writew(cinfo->ctl_addr + 0x68,
5183 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5185 pci_iounmap(pdev, cinfo->base_addr);
5186 if (cinfo->ctl_addr)
5187 pci_iounmap(pdev, cinfo->ctl_addr);
5189 #ifndef CONFIG_CYZ_INTR
5190 && !IS_CYC_Z(*cinfo)
5191 #endif /* CONFIG_CYZ_INTR */
5193 free_irq(cinfo->irq, cinfo);
5194 pci_release_regions(pdev);
5196 cinfo->base_addr = NULL;
5197 for (i = cinfo->first_line; i < cinfo->first_line +
5199 tty_unregister_device(cy_serial_driver, i);
5201 kfree(cinfo->ports);
5204 static struct pci_driver cy_pci_driver = {
5206 .id_table = cy_pci_dev_id,
5207 .probe = cy_pci_probe,
5208 .remove = __devexit_p(cy_pci_remove)
5213 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5214 int *eof, void *data)
5216 struct cyclades_port *info;
5222 __u32 cur_jifs = jiffies;
5224 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5225 "IdleIn Overruns Ldisc\n");
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];
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);
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);
5256 if (pos > offset + length)
5261 *start = buf + (offset - begin); /* Start of wanted data */
5262 len -= (offset - begin); /* Start slop */
5264 len = length; /* Ending slop */
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.
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.
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.
5288 static const struct tty_operations cy_ops = {
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,
5298 .throttle = cy_throttle,
5299 .unthrottle = cy_unthrottle,
5300 .set_termios = cy_set_termios,
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,
5311 static int __init cy_init(void)
5313 unsigned int nboards;
5314 int retval = -ENOMEM;
5316 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5317 if (!cy_serial_driver)
5320 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5321 __DATE__, __TIME__);
5323 /* Initialize the tty_driver structure */
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);
5338 retval = tty_register_driver(cy_serial_driver);
5340 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
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. */
5351 /* look for isa boards */
5352 nboards = cy_detect_isa();
5355 /* look for pci boards */
5356 retval = pci_register_driver(&cy_pci_driver);
5357 if (retval && !nboards) {
5358 tty_unregister_driver(cy_serial_driver);
5365 put_tty_driver(cy_serial_driver);
5370 static void __exit cy_cleanup_module(void)
5372 struct cyclades_card *card;
5375 #ifndef CONFIG_CYZ_INTR
5376 del_timer_sync(&cyz_timerlist);
5377 #endif /* CONFIG_CYZ_INTR */
5379 e1 = tty_unregister_driver(cy_serial_driver);
5381 printk(KERN_ERR "failed to unregister Cyclades serial "
5382 "driver(%d)\n", e1);
5385 pci_unregister_driver(&cy_pci_driver);
5388 for (i = 0; i < NR_CARDS; i++) {
5390 if (card->base_addr) {
5391 /* clear interrupt */
5392 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5393 iounmap(card->base_addr);
5395 iounmap(card->ctl_addr);
5397 #ifndef CONFIG_CYZ_INTR
5399 #endif /* CONFIG_CYZ_INTR */
5401 free_irq(card->irq, card);
5402 for (e1 = card->first_line; e1 < card->first_line +
5404 tty_unregister_device(cy_serial_driver, e1);
5409 put_tty_driver(cy_serial_driver);
5410 } /* cy_cleanup_module */
5412 module_init(cy_init);
5413 module_exit(cy_cleanup_module);
5415 MODULE_LICENSE("GPL");
5416 MODULE_VERSION(CY_VERSION);