2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
18 * - Fixed x86_64 cleanness
19 * - Fixed sleep with spinlock held in mxser_send_break
22 #include <linux/module.h>
23 #include <linux/errno.h>
24 #include <linux/signal.h>
25 #include <linux/sched.h>
26 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/tty.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/serial_reg.h>
32 #include <linux/major.h>
33 #include <linux/string.h>
34 #include <linux/fcntl.h>
35 #include <linux/ptrace.h>
36 #include <linux/gfp.h>
37 #include <linux/ioport.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/bitops.h>
43 #include <asm/system.h>
46 #include <asm/uaccess.h>
50 #define MXSER_VERSION "2.0.3" /* 1.11 */
51 #define MXSERMAJOR 174
52 #define MXSERCUMAJOR 175
54 #define MXSER_BOARDS 4 /* Max. boards */
55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57 #define MXSER_ISR_PASS_LIMIT 100
59 #define MXSER_ERR_IOADDR -1
60 #define MXSER_ERR_IRQ -2
61 #define MXSER_ERR_IRQ_CONFLIT -3
62 #define MXSER_ERR_VECTOR -4
64 /*CheckIsMoxaMust return value*/
65 #define MOXA_OTHER_UART 0x00
66 #define MOXA_MUST_MU150_HWID 0x01
67 #define MOXA_MUST_MU860_HWID 0x02
69 #define WAKEUP_CHARS 256
71 #define UART_MCR_AFE 0x20
72 #define UART_LSR_SPECIAL 0x1E
74 #define PCI_DEVICE_ID_CB108 0x1080
75 #define PCI_DEVICE_ID_CB114 0x1142
76 #define PCI_DEVICE_ID_CP114UL 0x1143
77 #define PCI_DEVICE_ID_CB134I 0x1341
78 #define PCI_DEVICE_ID_CP138U 0x1380
79 #define PCI_DEVICE_ID_POS104UL 0x1044
82 #define C168_ASIC_ID 1
83 #define C104_ASIC_ID 2
84 #define C102_ASIC_ID 0xB
85 #define CI132_ASIC_ID 4
86 #define CI134_ASIC_ID 3
87 #define CI104J_ASIC_ID 5
89 #define MXSER_HIGHBAUD 1
92 /* This is only for PCI */
102 } Gpci_uart_info[] = {
103 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
104 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
105 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
107 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
109 struct mxser_cardinfo {
115 static const struct mxser_cardinfo mxser_cards[] = {
116 /* 0*/ { "C168 series", 8, },
117 { "C104 series", 4, },
118 { "CI-104J series", 4, },
119 { "C168H/PCI series", 8, },
120 { "C104H/PCI series", 4, },
121 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
122 { "CI-132 series", 4, MXSER_HAS2 },
123 { "CI-134 series", 4, },
124 { "CP-132 series", 2, },
125 { "CP-114 series", 4, },
126 /*10*/ { "CT-114 series", 4, },
127 { "CP-102 series", 2, MXSER_HIGHBAUD },
128 { "CP-104U series", 4, },
129 { "CP-168U series", 8, },
130 { "CP-132U series", 2, },
131 /*15*/ { "CP-134U series", 4, },
132 { "CP-104JU series", 4, },
133 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
134 { "CP-118U series", 8, },
135 { "CP-102UL series", 2, },
136 /*20*/ { "CP-102U series", 2, },
137 { "CP-118EL series", 8, },
138 { "CP-168EL series", 8, },
139 { "CP-104EL series", 4, },
140 { "CB-108 series", 8, },
141 /*25*/ { "CB-114 series", 4, },
142 { "CB-134I series", 4, },
143 { "CP-138U series", 8, },
144 { "POS-104UL series", 4, },
145 { "CP-114UL series", 4, }
148 /* driver_data correspond to the lines in the structure above
149 see also ISA probe function before you change something */
150 static struct pci_device_id mxser_pcibrds[] = {
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
180 static int ttymajor = MXSERMAJOR;
182 /* Variables for insmod */
184 MODULE_AUTHOR("Casper Yang");
185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186 module_param_array(ioaddr, int, NULL, 0);
187 module_param(ttymajor, int, 0);
188 MODULE_LICENSE("GPL");
192 unsigned long rxcnt[MXSER_PORTS];
193 unsigned long txcnt[MXSER_PORTS];
200 unsigned long up_rxcnt;
201 unsigned long up_txcnt;
203 unsigned char hold_reason;
206 struct mxser_mon_ext {
207 unsigned long rx_cnt[32];
208 unsigned long tx_cnt[32];
209 unsigned long up_rxcnt[32];
210 unsigned long up_txcnt[32];
211 int modem_status[32];
225 struct tty_port port;
226 struct mxser_board *board;
228 unsigned long ioaddr;
229 unsigned long opmode_ioaddr;
233 int rx_trigger; /* Rx fifo trigger level */
235 int baud_base; /* max. speed */
236 int type; /* UART type */
238 int x_char; /* xon/xoff character */
239 int IER; /* Interrupt Enable Register */
240 int MCR; /* Modem control register */
242 unsigned char stop_rx;
243 unsigned char ldisc_stop_rx;
246 unsigned char err_shadow;
248 struct async_icount icount; /* kernel counters for 4 input interrupts */
251 int read_status_mask;
252 int ignore_status_mask;
258 struct ktermios normal_termios;
260 struct mxser_mon mon_data;
263 wait_queue_head_t delta_msr_wait;
269 const struct mxser_cardinfo *info;
270 unsigned long vector;
271 unsigned long vector_mask;
276 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
279 struct mxser_mstatus {
287 static struct mxser_mstatus GMStatus[MXSER_PORTS];
289 static int mxserBoardCAP[MXSER_BOARDS] = {
291 /* 0x180, 0x280, 0x200, 0x320 */
294 static struct mxser_board mxser_boards[MXSER_BOARDS];
295 static struct tty_driver *mxvar_sdriver;
296 static struct mxser_log mxvar_log;
297 static int mxvar_diagflag;
298 static unsigned char mxser_msr[MXSER_PORTS + 1];
299 static struct mxser_mon_ext mon_data_ext;
300 static int mxser_set_baud_method[MXSER_PORTS + 1];
302 static void mxser_enable_must_enchance_mode(unsigned long baseio)
307 oldlcr = inb(baseio + UART_LCR);
308 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
310 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
311 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
313 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
314 outb(oldlcr, baseio + UART_LCR);
317 static void mxser_disable_must_enchance_mode(unsigned long baseio)
322 oldlcr = inb(baseio + UART_LCR);
323 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
325 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
326 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
328 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
329 outb(oldlcr, baseio + UART_LCR);
332 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
337 oldlcr = inb(baseio + UART_LCR);
338 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
340 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
341 efr &= ~MOXA_MUST_EFR_BANK_MASK;
342 efr |= MOXA_MUST_EFR_BANK0;
344 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
345 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
346 outb(oldlcr, baseio + UART_LCR);
349 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
354 oldlcr = inb(baseio + UART_LCR);
355 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
357 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
358 efr &= ~MOXA_MUST_EFR_BANK_MASK;
359 efr |= MOXA_MUST_EFR_BANK0;
361 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
362 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
363 outb(oldlcr, baseio + UART_LCR);
366 static void mxser_set_must_fifo_value(struct mxser_port *info)
371 oldlcr = inb(info->ioaddr + UART_LCR);
372 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
374 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
375 efr &= ~MOXA_MUST_EFR_BANK_MASK;
376 efr |= MOXA_MUST_EFR_BANK1;
378 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
379 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
380 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
381 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
382 outb(oldlcr, info->ioaddr + UART_LCR);
385 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
390 oldlcr = inb(baseio + UART_LCR);
391 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
393 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
394 efr &= ~MOXA_MUST_EFR_BANK_MASK;
395 efr |= MOXA_MUST_EFR_BANK2;
397 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
398 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
399 outb(oldlcr, baseio + UART_LCR);
402 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
407 oldlcr = inb(baseio + UART_LCR);
408 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
410 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
411 efr &= ~MOXA_MUST_EFR_BANK_MASK;
412 efr |= MOXA_MUST_EFR_BANK2;
414 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
415 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
416 outb(oldlcr, baseio + UART_LCR);
419 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
424 oldlcr = inb(baseio + UART_LCR);
425 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
427 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
428 efr &= ~MOXA_MUST_EFR_SF_MASK;
430 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
431 outb(oldlcr, baseio + UART_LCR);
434 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
439 oldlcr = inb(baseio + UART_LCR);
440 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
442 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
443 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
444 efr |= MOXA_MUST_EFR_SF_TX1;
446 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
447 outb(oldlcr, baseio + UART_LCR);
450 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
455 oldlcr = inb(baseio + UART_LCR);
456 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
458 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
459 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
461 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
462 outb(oldlcr, baseio + UART_LCR);
465 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
470 oldlcr = inb(baseio + UART_LCR);
471 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
473 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
474 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
475 efr |= MOXA_MUST_EFR_SF_RX1;
477 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
478 outb(oldlcr, baseio + UART_LCR);
481 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
486 oldlcr = inb(baseio + UART_LCR);
487 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
489 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
490 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
492 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
493 outb(oldlcr, baseio + UART_LCR);
497 static int __devinit CheckIsMoxaMust(unsigned long io)
502 outb(0, io + UART_LCR);
503 mxser_disable_must_enchance_mode(io);
504 oldmcr = inb(io + UART_MCR);
505 outb(0, io + UART_MCR);
506 mxser_set_must_xon1_value(io, 0x11);
507 if ((hwid = inb(io + UART_MCR)) != 0) {
508 outb(oldmcr, io + UART_MCR);
509 return MOXA_OTHER_UART;
512 mxser_get_must_hardware_id(io, &hwid);
513 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
514 if (hwid == Gpci_uart_info[i].type)
517 return MOXA_OTHER_UART;
521 static void process_txrx_fifo(struct mxser_port *info)
525 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
526 info->rx_trigger = 1;
527 info->rx_high_water = 1;
528 info->rx_low_water = 1;
529 info->xmit_fifo_size = 1;
531 for (i = 0; i < UART_INFO_NUM; i++)
532 if (info->board->chip_flag == Gpci_uart_info[i].type) {
533 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
534 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
535 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
536 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
541 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
543 unsigned char status = 0;
545 status = inb(baseaddr + UART_MSR);
547 mxser_msr[port] &= 0x0F;
548 mxser_msr[port] |= status;
549 status = mxser_msr[port];
556 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
557 struct mxser_port *port)
559 DECLARE_WAITQUEUE(wait, current);
565 * If non-blocking mode is set, or the port is not enabled,
566 * then make the check up front and then exit.
568 if ((filp->f_flags & O_NONBLOCK) ||
569 test_bit(TTY_IO_ERROR, &tty->flags)) {
570 port->port.flags |= ASYNC_NORMAL_ACTIVE;
574 if (tty->termios->c_cflag & CLOCAL)
578 * Block waiting for the carrier detect and the line to become
579 * free (i.e., not in use by the callout). While we are in
580 * this loop, port->port.count is dropped by one, so that
581 * mxser_close() knows when to free things. We restore it upon
582 * exit, either normal or abnormal.
585 add_wait_queue(&port->port.open_wait, &wait);
587 spin_lock_irqsave(&port->slock, flags);
588 if (!tty_hung_up_p(filp))
590 spin_unlock_irqrestore(&port->slock, flags);
591 port->port.blocked_open++;
593 spin_lock_irqsave(&port->slock, flags);
594 outb(inb(port->ioaddr + UART_MCR) |
595 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
596 spin_unlock_irqrestore(&port->slock, flags);
597 set_current_state(TASK_INTERRUPTIBLE);
598 if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) {
599 if (port->port.flags & ASYNC_HUP_NOTIFY)
602 retval = -ERESTARTSYS;
605 if (!(port->port.flags & ASYNC_CLOSING) &&
607 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
609 if (signal_pending(current)) {
610 retval = -ERESTARTSYS;
615 set_current_state(TASK_RUNNING);
616 remove_wait_queue(&port->port.open_wait, &wait);
617 if (!tty_hung_up_p(filp))
619 port->port.blocked_open--;
622 port->port.flags |= ASYNC_NORMAL_ACTIVE;
626 static int mxser_set_baud(struct mxser_port *info, long newspd)
631 if (!info->port.tty || !info->port.tty->termios)
637 if (newspd > info->max_baud)
641 quot = 2 * info->baud_base / 269;
642 tty_encode_baud_rate(info->port.tty, 134, 134);
644 quot = info->baud_base / newspd;
647 baud = info->baud_base/quot;
648 tty_encode_baud_rate(info->port.tty, baud, baud);
653 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
654 info->timeout += HZ / 50; /* Add .02 seconds of slop */
657 info->MCR |= UART_MCR_DTR;
658 outb(info->MCR, info->ioaddr + UART_MCR);
660 info->MCR &= ~UART_MCR_DTR;
661 outb(info->MCR, info->ioaddr + UART_MCR);
665 cval = inb(info->ioaddr + UART_LCR);
667 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
669 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
670 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
671 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
674 if (C_BAUD(info->port.tty) == BOTHER) {
675 quot = info->baud_base % newspd;
677 if (quot % newspd > newspd / 2) {
683 mxser_set_must_enum_value(info->ioaddr, quot);
686 mxser_set_must_enum_value(info->ioaddr, 0);
692 * This routine is called to set the UART divisor registers to match
693 * the specified baud rate for a serial port.
695 static int mxser_change_speed(struct mxser_port *info,
696 struct ktermios *old_termios)
698 unsigned cflag, cval, fcr;
700 unsigned char status;
702 if (!info->port.tty || !info->port.tty->termios)
704 cflag = info->port.tty->termios->c_cflag;
708 if (mxser_set_baud_method[info->port.tty->index] == 0)
709 mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
711 /* byte size and parity */
712 switch (cflag & CSIZE) {
727 break; /* too keep GCC shut... */
732 cval |= UART_LCR_PARITY;
733 if (!(cflag & PARODD))
734 cval |= UART_LCR_EPAR;
736 cval |= UART_LCR_SPAR;
738 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
739 if (info->board->chip_flag) {
740 fcr = UART_FCR_ENABLE_FIFO;
741 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
742 mxser_set_must_fifo_value(info);
746 fcr = UART_FCR_ENABLE_FIFO;
747 if (info->board->chip_flag) {
748 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
749 mxser_set_must_fifo_value(info);
751 switch (info->rx_trigger) {
753 fcr |= UART_FCR_TRIGGER_1;
756 fcr |= UART_FCR_TRIGGER_4;
759 fcr |= UART_FCR_TRIGGER_8;
762 fcr |= UART_FCR_TRIGGER_14;
768 /* CTS flow control flag and modem status interrupts */
769 info->IER &= ~UART_IER_MSI;
770 info->MCR &= ~UART_MCR_AFE;
771 if (cflag & CRTSCTS) {
772 info->port.flags |= ASYNC_CTS_FLOW;
773 info->IER |= UART_IER_MSI;
774 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
775 info->MCR |= UART_MCR_AFE;
777 status = inb(info->ioaddr + UART_MSR);
778 if (info->port.tty->hw_stopped) {
779 if (status & UART_MSR_CTS) {
780 info->port.tty->hw_stopped = 0;
781 if (info->type != PORT_16550A &&
782 !info->board->chip_flag) {
783 outb(info->IER & ~UART_IER_THRI,
786 info->IER |= UART_IER_THRI;
787 outb(info->IER, info->ioaddr +
790 tty_wakeup(info->port.tty);
793 if (!(status & UART_MSR_CTS)) {
794 info->port.tty->hw_stopped = 1;
795 if ((info->type != PORT_16550A) &&
796 (!info->board->chip_flag)) {
797 info->IER &= ~UART_IER_THRI;
798 outb(info->IER, info->ioaddr +
805 info->port.flags &= ~ASYNC_CTS_FLOW;
807 outb(info->MCR, info->ioaddr + UART_MCR);
808 if (cflag & CLOCAL) {
809 info->port.flags &= ~ASYNC_CHECK_CD;
811 info->port.flags |= ASYNC_CHECK_CD;
812 info->IER |= UART_IER_MSI;
814 outb(info->IER, info->ioaddr + UART_IER);
817 * Set up parity check flag
819 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
820 if (I_INPCK(info->port.tty))
821 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
822 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
823 info->read_status_mask |= UART_LSR_BI;
825 info->ignore_status_mask = 0;
827 if (I_IGNBRK(info->port.tty)) {
828 info->ignore_status_mask |= UART_LSR_BI;
829 info->read_status_mask |= UART_LSR_BI;
831 * If we're ignore parity and break indicators, ignore
832 * overruns too. (For real raw support).
834 if (I_IGNPAR(info->port.tty)) {
835 info->ignore_status_mask |=
839 info->read_status_mask |=
845 if (info->board->chip_flag) {
846 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
847 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
848 if (I_IXON(info->port.tty)) {
849 mxser_enable_must_rx_software_flow_control(
852 mxser_disable_must_rx_software_flow_control(
855 if (I_IXOFF(info->port.tty)) {
856 mxser_enable_must_tx_software_flow_control(
859 mxser_disable_must_tx_software_flow_control(
865 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
866 outb(cval, info->ioaddr + UART_LCR);
871 static void mxser_check_modem_status(struct mxser_port *port, int status)
873 /* update input line counters */
874 if (status & UART_MSR_TERI)
876 if (status & UART_MSR_DDSR)
878 if (status & UART_MSR_DDCD)
880 if (status & UART_MSR_DCTS)
882 port->mon_data.modem_status = status;
883 wake_up_interruptible(&port->delta_msr_wait);
885 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
886 if (status & UART_MSR_DCD)
887 wake_up_interruptible(&port->port.open_wait);
890 if (port->port.flags & ASYNC_CTS_FLOW) {
891 if (port->port.tty->hw_stopped) {
892 if (status & UART_MSR_CTS) {
893 port->port.tty->hw_stopped = 0;
895 if ((port->type != PORT_16550A) &&
896 (!port->board->chip_flag)) {
897 outb(port->IER & ~UART_IER_THRI,
898 port->ioaddr + UART_IER);
899 port->IER |= UART_IER_THRI;
900 outb(port->IER, port->ioaddr +
903 tty_wakeup(port->port.tty);
906 if (!(status & UART_MSR_CTS)) {
907 port->port.tty->hw_stopped = 1;
908 if (port->type != PORT_16550A &&
909 !port->board->chip_flag) {
910 port->IER &= ~UART_IER_THRI;
911 outb(port->IER, port->ioaddr +
919 static int mxser_startup(struct mxser_port *info)
924 page = __get_free_page(GFP_KERNEL);
928 spin_lock_irqsave(&info->slock, flags);
930 if (info->port.flags & ASYNC_INITIALIZED) {
932 spin_unlock_irqrestore(&info->slock, flags);
936 if (!info->ioaddr || !info->type) {
938 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
940 spin_unlock_irqrestore(&info->slock, flags);
943 if (info->port.xmit_buf)
946 info->port.xmit_buf = (unsigned char *) page;
949 * Clear the FIFO buffers and disable them
950 * (they will be reenabled in mxser_change_speed())
952 if (info->board->chip_flag)
953 outb((UART_FCR_CLEAR_RCVR |
954 UART_FCR_CLEAR_XMIT |
955 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
957 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
958 info->ioaddr + UART_FCR);
961 * At this point there's no way the LSR could still be 0xFF;
962 * if it is, then bail out, because there's likely no UART
965 if (inb(info->ioaddr + UART_LSR) == 0xff) {
966 spin_unlock_irqrestore(&info->slock, flags);
967 if (capable(CAP_SYS_ADMIN)) {
969 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
976 * Clear the interrupt registers.
978 (void) inb(info->ioaddr + UART_LSR);
979 (void) inb(info->ioaddr + UART_RX);
980 (void) inb(info->ioaddr + UART_IIR);
981 (void) inb(info->ioaddr + UART_MSR);
984 * Now, initialize the UART
986 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
987 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
988 outb(info->MCR, info->ioaddr + UART_MCR);
991 * Finally, enable interrupts
993 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
995 if (info->board->chip_flag)
996 info->IER |= MOXA_MUST_IER_EGDAI;
997 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
1000 * And clear the interrupt registers again for luck.
1002 (void) inb(info->ioaddr + UART_LSR);
1003 (void) inb(info->ioaddr + UART_RX);
1004 (void) inb(info->ioaddr + UART_IIR);
1005 (void) inb(info->ioaddr + UART_MSR);
1008 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1009 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1012 * and set the speed of the serial port
1014 mxser_change_speed(info, NULL);
1015 info->port.flags |= ASYNC_INITIALIZED;
1016 spin_unlock_irqrestore(&info->slock, flags);
1022 * This routine will shutdown a serial port; interrupts maybe disabled, and
1023 * DTR is dropped if the hangup on close termio flag is on.
1025 static void mxser_shutdown(struct mxser_port *info)
1027 unsigned long flags;
1029 if (!(info->port.flags & ASYNC_INITIALIZED))
1032 spin_lock_irqsave(&info->slock, flags);
1035 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1036 * here so the queue might never be waken up
1038 wake_up_interruptible(&info->delta_msr_wait);
1041 * Free the IRQ, if necessary
1043 if (info->port.xmit_buf) {
1044 free_page((unsigned long) info->port.xmit_buf);
1045 info->port.xmit_buf = NULL;
1049 outb(0x00, info->ioaddr + UART_IER);
1051 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
1052 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
1053 outb(info->MCR, info->ioaddr + UART_MCR);
1055 /* clear Rx/Tx FIFO's */
1056 if (info->board->chip_flag)
1057 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
1058 MOXA_MUST_FCR_GDA_MODE_ENABLE,
1059 info->ioaddr + UART_FCR);
1061 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1062 info->ioaddr + UART_FCR);
1064 /* read data port to reset things */
1065 (void) inb(info->ioaddr + UART_RX);
1068 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1070 info->port.flags &= ~ASYNC_INITIALIZED;
1072 if (info->board->chip_flag)
1073 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1075 spin_unlock_irqrestore(&info->slock, flags);
1079 * This routine is called whenever a serial port is opened. It
1080 * enables interrupts for a serial port, linking in its async structure into
1081 * the IRQ chain. It also performs the serial-specific
1082 * initialization for the tty structure.
1084 static int mxser_open(struct tty_struct *tty, struct file *filp)
1086 struct mxser_port *info;
1087 unsigned long flags;
1091 if (line == MXSER_PORTS)
1093 if (line < 0 || line > MXSER_PORTS)
1095 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1099 tty->driver_data = info;
1100 info->port.tty = tty;
1102 * Start up serial port
1104 spin_lock_irqsave(&info->slock, flags);
1106 spin_unlock_irqrestore(&info->slock, flags);
1107 retval = mxser_startup(info);
1111 retval = mxser_block_til_ready(tty, filp, info);
1115 /* unmark here for very high baud rate (ex. 921600 bps) used */
1116 tty->low_latency = 1;
1120 static void mxser_flush_buffer(struct tty_struct *tty)
1122 struct mxser_port *info = tty->driver_data;
1124 unsigned long flags;
1127 spin_lock_irqsave(&info->slock, flags);
1128 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1130 fcr = inb(info->ioaddr + UART_FCR);
1131 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1132 info->ioaddr + UART_FCR);
1133 outb(fcr, info->ioaddr + UART_FCR);
1135 spin_unlock_irqrestore(&info->slock, flags);
1142 * This routine is called when the serial port gets closed. First, we
1143 * wait for the last remaining data to be sent. Then, we unlink its
1144 * async structure from the interrupt chain if necessary, and we free
1145 * that IRQ if nothing is left in the chain.
1147 static void mxser_close(struct tty_struct *tty, struct file *filp)
1149 struct mxser_port *info = tty->driver_data;
1151 unsigned long timeout;
1152 unsigned long flags;
1154 if (tty->index == MXSER_PORTS)
1159 spin_lock_irqsave(&info->slock, flags);
1161 if (tty_hung_up_p(filp)) {
1162 spin_unlock_irqrestore(&info->slock, flags);
1165 if ((tty->count == 1) && (info->port.count != 1)) {
1167 * Uh, oh. tty->count is 1, which means that the tty
1168 * structure will be freed. Info->port.count should always
1169 * be one in these conditions. If it's greater than
1170 * one, we've got real problems, since it means the
1171 * serial port won't be shutdown.
1173 printk(KERN_ERR "mxser_close: bad serial port count; "
1174 "tty->count is 1, info->port.count is %d\n", info->port.count);
1175 info->port.count = 1;
1177 if (--info->port.count < 0) {
1178 printk(KERN_ERR "mxser_close: bad serial port count for "
1179 "ttys%d: %d\n", tty->index, info->port.count);
1180 info->port.count = 0;
1182 if (info->port.count) {
1183 spin_unlock_irqrestore(&info->slock, flags);
1186 info->port.flags |= ASYNC_CLOSING;
1187 spin_unlock_irqrestore(&info->slock, flags);
1189 * Save the termios structure, since this port may have
1190 * separate termios for callout and dialin.
1192 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1193 info->normal_termios = *tty->termios;
1195 * Now we wait for the transmit buffer to clear; and we notify
1196 * the line discipline to only process XON/XOFF characters.
1199 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1200 tty_wait_until_sent(tty, info->port.closing_wait);
1202 * At this point we stop accepting input. To do this, we
1203 * disable the receive line status interrupts, and tell the
1204 * interrupt driver to stop checking the data ready bit in the
1205 * line status register.
1207 info->IER &= ~UART_IER_RLSI;
1208 if (info->board->chip_flag)
1209 info->IER &= ~MOXA_MUST_RECV_ISR;
1211 if (info->port.flags & ASYNC_INITIALIZED) {
1212 outb(info->IER, info->ioaddr + UART_IER);
1214 * Before we drop DTR, make sure the UART transmitter
1215 * has completely drained; this is especially
1216 * important if there is a transmit FIFO!
1218 timeout = jiffies + HZ;
1219 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1220 schedule_timeout_interruptible(5);
1221 if (time_after(jiffies, timeout))
1225 mxser_shutdown(info);
1227 mxser_flush_buffer(tty);
1228 tty_ldisc_flush(tty);
1231 info->port.tty = NULL;
1232 if (info->port.blocked_open) {
1233 if (info->port.close_delay)
1234 schedule_timeout_interruptible(info->port.close_delay);
1235 wake_up_interruptible(&info->port.open_wait);
1238 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1241 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1244 struct mxser_port *info = tty->driver_data;
1245 unsigned long flags;
1247 if (!info->port.xmit_buf)
1251 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1252 SERIAL_XMIT_SIZE - info->xmit_head));
1256 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1257 spin_lock_irqsave(&info->slock, flags);
1258 info->xmit_head = (info->xmit_head + c) &
1259 (SERIAL_XMIT_SIZE - 1);
1260 info->xmit_cnt += c;
1261 spin_unlock_irqrestore(&info->slock, flags);
1268 if (info->xmit_cnt && !tty->stopped) {
1269 if (!tty->hw_stopped ||
1270 (info->type == PORT_16550A) ||
1271 (info->board->chip_flag)) {
1272 spin_lock_irqsave(&info->slock, flags);
1273 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1275 info->IER |= UART_IER_THRI;
1276 outb(info->IER, info->ioaddr + UART_IER);
1277 spin_unlock_irqrestore(&info->slock, flags);
1283 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1285 struct mxser_port *info = tty->driver_data;
1286 unsigned long flags;
1288 if (!info->port.xmit_buf)
1291 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1294 spin_lock_irqsave(&info->slock, flags);
1295 info->port.xmit_buf[info->xmit_head++] = ch;
1296 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1298 spin_unlock_irqrestore(&info->slock, flags);
1299 if (!tty->stopped) {
1300 if (!tty->hw_stopped ||
1301 (info->type == PORT_16550A) ||
1302 info->board->chip_flag) {
1303 spin_lock_irqsave(&info->slock, flags);
1304 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1305 info->IER |= UART_IER_THRI;
1306 outb(info->IER, info->ioaddr + UART_IER);
1307 spin_unlock_irqrestore(&info->slock, flags);
1314 static void mxser_flush_chars(struct tty_struct *tty)
1316 struct mxser_port *info = tty->driver_data;
1317 unsigned long flags;
1319 if (info->xmit_cnt <= 0 ||
1321 !info->port.xmit_buf ||
1323 (info->type != PORT_16550A) &&
1324 (!info->board->chip_flag)
1328 spin_lock_irqsave(&info->slock, flags);
1330 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1331 info->IER |= UART_IER_THRI;
1332 outb(info->IER, info->ioaddr + UART_IER);
1334 spin_unlock_irqrestore(&info->slock, flags);
1337 static int mxser_write_room(struct tty_struct *tty)
1339 struct mxser_port *info = tty->driver_data;
1342 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1348 static int mxser_chars_in_buffer(struct tty_struct *tty)
1350 struct mxser_port *info = tty->driver_data;
1351 return info->xmit_cnt;
1355 * ------------------------------------------------------------
1356 * friends of mxser_ioctl()
1357 * ------------------------------------------------------------
1359 static int mxser_get_serial_info(struct mxser_port *info,
1360 struct serial_struct __user *retinfo)
1362 struct serial_struct tmp = {
1364 .line = info->port.tty->index,
1365 .port = info->ioaddr,
1366 .irq = info->board->irq,
1367 .flags = info->port.flags,
1368 .baud_base = info->baud_base,
1369 .close_delay = info->port.close_delay,
1370 .closing_wait = info->port.closing_wait,
1371 .custom_divisor = info->custom_divisor,
1374 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1379 static int mxser_set_serial_info(struct mxser_port *info,
1380 struct serial_struct __user *new_info)
1382 struct serial_struct new_serial;
1384 unsigned long sl_flags;
1388 if (!new_info || !info->ioaddr)
1390 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1393 if (new_serial.irq != info->board->irq ||
1394 new_serial.port != info->ioaddr)
1397 flags = info->port.flags & ASYNC_SPD_MASK;
1399 if (!capable(CAP_SYS_ADMIN)) {
1400 if ((new_serial.baud_base != info->baud_base) ||
1401 (new_serial.close_delay != info->port.close_delay) ||
1402 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1404 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1405 (new_serial.flags & ASYNC_USR_MASK));
1408 * OK, past this point, all the error checking has been done.
1409 * At this point, we start making changes.....
1411 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1412 (new_serial.flags & ASYNC_FLAGS));
1413 info->port.close_delay = new_serial.close_delay * HZ / 100;
1414 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1415 info->port.tty->low_latency =
1416 (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1417 info->port.tty->low_latency = 0;
1418 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1419 (new_serial.baud_base != info->baud_base ||
1420 new_serial.custom_divisor !=
1421 info->custom_divisor)) {
1422 baud = new_serial.baud_base / new_serial.custom_divisor;
1423 tty_encode_baud_rate(info->port.tty, baud, baud);
1427 info->type = new_serial.type;
1429 process_txrx_fifo(info);
1431 if (info->port.flags & ASYNC_INITIALIZED) {
1432 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1433 spin_lock_irqsave(&info->slock, sl_flags);
1434 mxser_change_speed(info, NULL);
1435 spin_unlock_irqrestore(&info->slock, sl_flags);
1438 retval = mxser_startup(info);
1444 * mxser_get_lsr_info - get line status register info
1446 * Purpose: Let user call ioctl() to get info when the UART physically
1447 * is emptied. On bus types like RS485, the transmitter must
1448 * release the bus after transmitting. This must be done when
1449 * the transmit shift register is empty, not be done when the
1450 * transmit holding register is empty. This functionality
1451 * allows an RS485 driver to be written in user space.
1453 static int mxser_get_lsr_info(struct mxser_port *info,
1454 unsigned int __user *value)
1456 unsigned char status;
1457 unsigned int result;
1458 unsigned long flags;
1460 spin_lock_irqsave(&info->slock, flags);
1461 status = inb(info->ioaddr + UART_LSR);
1462 spin_unlock_irqrestore(&info->slock, flags);
1463 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1464 return put_user(result, value);
1467 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1469 struct mxser_port *info = tty->driver_data;
1470 unsigned char control, status;
1471 unsigned long flags;
1474 if (tty->index == MXSER_PORTS)
1475 return -ENOIOCTLCMD;
1476 if (test_bit(TTY_IO_ERROR, &tty->flags))
1479 control = info->MCR;
1481 spin_lock_irqsave(&info->slock, flags);
1482 status = inb(info->ioaddr + UART_MSR);
1483 if (status & UART_MSR_ANY_DELTA)
1484 mxser_check_modem_status(info, status);
1485 spin_unlock_irqrestore(&info->slock, flags);
1486 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1487 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1488 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1489 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1490 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1491 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1494 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1495 unsigned int set, unsigned int clear)
1497 struct mxser_port *info = tty->driver_data;
1498 unsigned long flags;
1501 if (tty->index == MXSER_PORTS)
1502 return -ENOIOCTLCMD;
1503 if (test_bit(TTY_IO_ERROR, &tty->flags))
1506 spin_lock_irqsave(&info->slock, flags);
1508 if (set & TIOCM_RTS)
1509 info->MCR |= UART_MCR_RTS;
1510 if (set & TIOCM_DTR)
1511 info->MCR |= UART_MCR_DTR;
1513 if (clear & TIOCM_RTS)
1514 info->MCR &= ~UART_MCR_RTS;
1515 if (clear & TIOCM_DTR)
1516 info->MCR &= ~UART_MCR_DTR;
1518 outb(info->MCR, info->ioaddr + UART_MCR);
1519 spin_unlock_irqrestore(&info->slock, flags);
1523 static int __init mxser_program_mode(int port)
1535 id = inb(port + 1) & 0x1F;
1536 if ((id != C168_ASIC_ID) &&
1537 (id != C104_ASIC_ID) &&
1538 (id != C102_ASIC_ID) &&
1539 (id != CI132_ASIC_ID) &&
1540 (id != CI134_ASIC_ID) &&
1541 (id != CI104J_ASIC_ID))
1543 for (i = 0, j = 0; i < 4; i++) {
1547 } else if ((j == 1) && (n == 1)) {
1558 static void __init mxser_normal_mode(int port)
1562 outb(0xA5, port + 1);
1563 outb(0x80, port + 3);
1564 outb(12, port + 0); /* 9600 bps */
1566 outb(0x03, port + 3); /* 8 data bits */
1567 outb(0x13, port + 4); /* loop back mode */
1568 for (i = 0; i < 16; i++) {
1570 if ((n & 0x61) == 0x60)
1575 outb(0x00, port + 4);
1578 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1579 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1580 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1581 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1582 #define EN_CCMD 0x000 /* Chip's command register */
1583 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1584 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1585 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1586 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1587 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1588 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1589 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1590 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1591 static int __init mxser_read_register(int port, unsigned short *regs)
1593 int i, k, value, id;
1596 id = mxser_program_mode(port);
1599 for (i = 0; i < 14; i++) {
1600 k = (i & 0x3F) | 0x180;
1601 for (j = 0x100; j > 0; j >>= 1) {
1602 outb(CHIP_CS, port);
1604 outb(CHIP_CS | CHIP_DO, port);
1605 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1607 outb(CHIP_CS, port);
1608 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1613 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1614 outb(CHIP_CS, port);
1615 outb(CHIP_CS | CHIP_SK, port);
1616 if (inb(port) & CHIP_DI)
1622 mxser_normal_mode(port);
1626 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1628 struct mxser_port *port;
1634 case MOXA_GET_MAJOR:
1635 return put_user(ttymajor, (int __user *)argp);
1637 case MOXA_CHKPORTENABLE:
1640 for (i = 0; i < MXSER_BOARDS; i++)
1641 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1642 if (mxser_boards[i].ports[j].ioaddr)
1645 return put_user(result, (unsigned long __user *)argp);
1646 case MOXA_GETDATACOUNT:
1648 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1652 case MOXA_GETMSTATUS:
1654 for (i = 0; i < MXSER_BOARDS; i++)
1655 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1656 port = &mxser_boards[i].ports[j];
1659 if (!port->ioaddr) {
1660 GMStatus[i].dcd = 0;
1661 GMStatus[i].dsr = 0;
1662 GMStatus[i].cts = 0;
1666 if (!port->port.tty || !port->port.tty->termios)
1668 port->normal_termios.c_cflag;
1671 port->port.tty->termios->c_cflag;
1673 status = inb(port->ioaddr + UART_MSR);
1674 if (status & 0x80 /*UART_MSR_DCD */ )
1675 GMStatus[i].dcd = 1;
1677 GMStatus[i].dcd = 0;
1679 if (status & 0x20 /*UART_MSR_DSR */ )
1680 GMStatus[i].dsr = 1;
1682 GMStatus[i].dsr = 0;
1685 if (status & 0x10 /*UART_MSR_CTS */ )
1686 GMStatus[i].cts = 1;
1688 GMStatus[i].cts = 0;
1691 if (copy_to_user(argp, GMStatus,
1692 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1695 case MOXA_ASPP_MON_EXT: {
1697 unsigned long opmode;
1698 unsigned cflag, iflag;
1701 for (i = 0; i < MXSER_BOARDS; i++) {
1702 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1703 port = &mxser_boards[i].ports[j];
1707 status = mxser_get_msr(port->ioaddr, 0, i);
1709 if (status & UART_MSR_TERI)
1711 if (status & UART_MSR_DDSR)
1713 if (status & UART_MSR_DDCD)
1715 if (status & UART_MSR_DCTS)
1718 port->mon_data.modem_status = status;
1719 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1720 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1721 mon_data_ext.up_rxcnt[i] =
1722 port->mon_data.up_rxcnt;
1723 mon_data_ext.up_txcnt[i] =
1724 port->mon_data.up_txcnt;
1725 mon_data_ext.modem_status[i] =
1726 port->mon_data.modem_status;
1727 mon_data_ext.baudrate[i] =
1728 tty_get_baud_rate(port->port.tty);
1730 if (!port->port.tty || !port->port.tty->termios) {
1731 cflag = port->normal_termios.c_cflag;
1732 iflag = port->normal_termios.c_iflag;
1734 cflag = port->port.tty->termios->c_cflag;
1735 iflag = port->port.tty->termios->c_iflag;
1738 mon_data_ext.databits[i] = cflag & CSIZE;
1740 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1742 mon_data_ext.parity[i] =
1743 cflag & (PARENB | PARODD | CMSPAR);
1745 mon_data_ext.flowctrl[i] = 0x00;
1747 if (cflag & CRTSCTS)
1748 mon_data_ext.flowctrl[i] |= 0x03;
1750 if (iflag & (IXON | IXOFF))
1751 mon_data_ext.flowctrl[i] |= 0x0C;
1753 if (port->type == PORT_16550A)
1754 mon_data_ext.fifo[i] = 1;
1756 mon_data_ext.fifo[i] = 0;
1760 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1761 opmode &= OP_MODE_MASK;
1763 mon_data_ext.iftype[i] = opmode;
1768 if (copy_to_user(argp, &mon_data_ext,
1769 sizeof(mon_data_ext)))
1774 return -ENOIOCTLCMD;
1779 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1780 struct async_icount *cprev)
1782 struct async_icount cnow;
1783 unsigned long flags;
1786 spin_lock_irqsave(&info->slock, flags);
1787 cnow = info->icount; /* atomic copy */
1788 spin_unlock_irqrestore(&info->slock, flags);
1790 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1791 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1792 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1793 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1800 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1801 unsigned int cmd, unsigned long arg)
1803 struct mxser_port *info = tty->driver_data;
1804 struct async_icount cnow;
1805 struct serial_icounter_struct __user *p_cuser;
1806 unsigned long flags;
1807 void __user *argp = (void __user *)arg;
1810 if (tty->index == MXSER_PORTS)
1811 return mxser_ioctl_special(cmd, argp);
1813 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1815 unsigned long opmode;
1816 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1818 unsigned char val, mask;
1821 if (cmd == MOXA_SET_OP_MODE) {
1822 if (get_user(opmode, (int __user *) argp))
1824 if (opmode != RS232_MODE &&
1825 opmode != RS485_2WIRE_MODE &&
1826 opmode != RS422_MODE &&
1827 opmode != RS485_4WIRE_MODE)
1832 val = inb(info->opmode_ioaddr);
1834 val |= (opmode << shiftbit);
1835 outb(val, info->opmode_ioaddr);
1840 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1841 opmode &= OP_MODE_MASK;
1843 if (put_user(opmode, (int __user *)argp))
1849 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1850 test_bit(TTY_IO_ERROR, &tty->flags))
1856 retval = mxser_get_serial_info(info, argp);
1861 retval = mxser_set_serial_info(info, argp);
1864 case TIOCSERGETLSR: /* Get line status register */
1865 return mxser_get_lsr_info(info, argp);
1867 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1868 * - mask passed in arg for lines of interest
1869 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1870 * Caller should use TIOCGICOUNT to see which one it was
1873 spin_lock_irqsave(&info->slock, flags);
1874 cnow = info->icount; /* note the counters on entry */
1875 spin_unlock_irqrestore(&info->slock, flags);
1877 return wait_event_interruptible(info->delta_msr_wait,
1878 mxser_cflags_changed(info, arg, &cnow));
1880 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1881 * Return: write counters to the user passed counter struct
1882 * NB: both 1->0 and 0->1 transitions are counted except for
1883 * RI where only 0->1 is counted.
1886 spin_lock_irqsave(&info->slock, flags);
1887 cnow = info->icount;
1888 spin_unlock_irqrestore(&info->slock, flags);
1890 if (put_user(cnow.frame, &p_cuser->frame))
1892 if (put_user(cnow.brk, &p_cuser->brk))
1894 if (put_user(cnow.overrun, &p_cuser->overrun))
1896 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1898 if (put_user(cnow.parity, &p_cuser->parity))
1900 if (put_user(cnow.rx, &p_cuser->rx))
1902 if (put_user(cnow.tx, &p_cuser->tx))
1904 put_user(cnow.cts, &p_cuser->cts);
1905 put_user(cnow.dsr, &p_cuser->dsr);
1906 put_user(cnow.rng, &p_cuser->rng);
1907 put_user(cnow.dcd, &p_cuser->dcd);
1909 case MOXA_HighSpeedOn:
1910 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1911 case MOXA_SDS_RSTICOUNTER:
1913 info->mon_data.rxcnt = 0;
1914 info->mon_data.txcnt = 0;
1918 case MOXA_ASPP_OQUEUE:{
1922 len = mxser_chars_in_buffer(tty);
1923 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1924 len += (lsr ? 0 : 1);
1927 return put_user(len, (int __user *)argp);
1929 case MOXA_ASPP_MON: {
1933 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1934 mxser_check_modem_status(info, status);
1936 mcr = inb(info->ioaddr + UART_MCR);
1937 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1938 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1940 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1942 if (mcr & MOXA_MUST_MCR_TX_XON)
1943 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1945 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1947 if (info->port.tty->hw_stopped)
1948 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1950 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1952 if (copy_to_user(argp, &info->mon_data,
1953 sizeof(struct mxser_mon)))
1958 case MOXA_ASPP_LSTATUS: {
1959 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1962 info->err_shadow = 0;
1965 case MOXA_SET_BAUD_METHOD: {
1968 if (get_user(method, (int __user *)argp))
1970 mxser_set_baud_method[tty->index] = method;
1971 return put_user(method, (int __user *)argp);
1974 return -ENOIOCTLCMD;
1979 static void mxser_stoprx(struct tty_struct *tty)
1981 struct mxser_port *info = tty->driver_data;
1983 info->ldisc_stop_rx = 1;
1985 if (info->board->chip_flag) {
1986 info->IER &= ~MOXA_MUST_RECV_ISR;
1987 outb(info->IER, info->ioaddr + UART_IER);
1989 info->x_char = STOP_CHAR(tty);
1990 outb(0, info->ioaddr + UART_IER);
1991 info->IER |= UART_IER_THRI;
1992 outb(info->IER, info->ioaddr + UART_IER);
1996 if (info->port.tty->termios->c_cflag & CRTSCTS) {
1997 info->MCR &= ~UART_MCR_RTS;
1998 outb(info->MCR, info->ioaddr + UART_MCR);
2003 * This routine is called by the upper-layer tty layer to signal that
2004 * incoming characters should be throttled.
2006 static void mxser_throttle(struct tty_struct *tty)
2011 static void mxser_unthrottle(struct tty_struct *tty)
2013 struct mxser_port *info = tty->driver_data;
2016 info->ldisc_stop_rx = 0;
2021 if (info->board->chip_flag) {
2022 info->IER |= MOXA_MUST_RECV_ISR;
2023 outb(info->IER, info->ioaddr + UART_IER);
2025 info->x_char = START_CHAR(tty);
2026 outb(0, info->ioaddr + UART_IER);
2027 info->IER |= UART_IER_THRI;
2028 outb(info->IER, info->ioaddr + UART_IER);
2033 if (info->port.tty->termios->c_cflag & CRTSCTS) {
2034 info->MCR |= UART_MCR_RTS;
2035 outb(info->MCR, info->ioaddr + UART_MCR);
2040 * mxser_stop() and mxser_start()
2042 * This routines are called before setting or resetting tty->stopped.
2043 * They enable or disable transmitter interrupts, as necessary.
2045 static void mxser_stop(struct tty_struct *tty)
2047 struct mxser_port *info = tty->driver_data;
2048 unsigned long flags;
2050 spin_lock_irqsave(&info->slock, flags);
2051 if (info->IER & UART_IER_THRI) {
2052 info->IER &= ~UART_IER_THRI;
2053 outb(info->IER, info->ioaddr + UART_IER);
2055 spin_unlock_irqrestore(&info->slock, flags);
2058 static void mxser_start(struct tty_struct *tty)
2060 struct mxser_port *info = tty->driver_data;
2061 unsigned long flags;
2063 spin_lock_irqsave(&info->slock, flags);
2064 if (info->xmit_cnt && info->port.xmit_buf) {
2065 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
2066 info->IER |= UART_IER_THRI;
2067 outb(info->IER, info->ioaddr + UART_IER);
2069 spin_unlock_irqrestore(&info->slock, flags);
2072 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2074 struct mxser_port *info = tty->driver_data;
2075 unsigned long flags;
2077 spin_lock_irqsave(&info->slock, flags);
2078 mxser_change_speed(info, old_termios);
2079 spin_unlock_irqrestore(&info->slock, flags);
2081 if ((old_termios->c_cflag & CRTSCTS) &&
2082 !(tty->termios->c_cflag & CRTSCTS)) {
2083 tty->hw_stopped = 0;
2087 /* Handle sw stopped */
2088 if ((old_termios->c_iflag & IXON) &&
2089 !(tty->termios->c_iflag & IXON)) {
2092 if (info->board->chip_flag) {
2093 spin_lock_irqsave(&info->slock, flags);
2094 mxser_disable_must_rx_software_flow_control(
2096 spin_unlock_irqrestore(&info->slock, flags);
2104 * mxser_wait_until_sent() --- wait until the transmitter is empty
2106 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2108 struct mxser_port *info = tty->driver_data;
2109 unsigned long orig_jiffies, char_time;
2112 if (info->type == PORT_UNKNOWN)
2115 if (info->xmit_fifo_size == 0)
2116 return; /* Just in case.... */
2118 orig_jiffies = jiffies;
2120 * Set the check interval to be 1/5 of the estimated time to
2121 * send a single character, and make it at least 1. The check
2122 * interval should also be less than the timeout.
2124 * Note: we have to use pretty tight timings here to satisfy
2127 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2128 char_time = char_time / 5;
2131 if (timeout && timeout < char_time)
2132 char_time = timeout;
2134 * If the transmitter hasn't cleared in twice the approximate
2135 * amount of time to send the entire FIFO, it probably won't
2136 * ever clear. This assumes the UART isn't doing flow
2137 * control, which is currently the case. Hence, if it ever
2138 * takes longer than info->timeout, this is probably due to a
2139 * UART bug of some kind. So, we clamp the timeout parameter at
2142 if (!timeout || timeout > 2 * info->timeout)
2143 timeout = 2 * info->timeout;
2144 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2145 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2146 timeout, char_time);
2147 printk("jiff=%lu...", jiffies);
2150 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2151 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2152 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2154 schedule_timeout_interruptible(char_time);
2155 if (signal_pending(current))
2157 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2160 set_current_state(TASK_RUNNING);
2163 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2164 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2169 * This routine is called by tty_hangup() when a hangup is signaled.
2171 static void mxser_hangup(struct tty_struct *tty)
2173 struct mxser_port *info = tty->driver_data;
2175 mxser_flush_buffer(tty);
2176 mxser_shutdown(info);
2177 info->port.count = 0;
2178 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2179 info->port.tty = NULL;
2180 wake_up_interruptible(&info->port.open_wait);
2184 * mxser_rs_break() --- routine which turns the break handling on or off
2186 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2188 struct mxser_port *info = tty->driver_data;
2189 unsigned long flags;
2191 spin_lock_irqsave(&info->slock, flags);
2192 if (break_state == -1)
2193 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2194 info->ioaddr + UART_LCR);
2196 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2197 info->ioaddr + UART_LCR);
2198 spin_unlock_irqrestore(&info->slock, flags);
2201 static void mxser_receive_chars(struct mxser_port *port, int *status)
2203 struct tty_struct *tty = port->port.tty;
2204 unsigned char ch, gdl;
2210 recv_room = tty->receive_room;
2211 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2214 if (port->board->chip_flag != MOXA_OTHER_UART) {
2216 if (*status & UART_LSR_SPECIAL)
2218 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2219 (*status & MOXA_MUST_LSR_RERR))
2221 if (*status & MOXA_MUST_LSR_RERR)
2224 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2226 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2227 gdl &= MOXA_MUST_GDL_MASK;
2228 if (gdl >= recv_room) {
2229 if (!port->ldisc_stop_rx)
2233 ch = inb(port->ioaddr + UART_RX);
2234 tty_insert_flip_char(tty, ch, 0);
2245 ch = inb(port->ioaddr + UART_RX);
2246 if (port->board->chip_flag && (*status & UART_LSR_OE))
2247 outb(0x23, port->ioaddr + UART_FCR);
2248 *status &= port->read_status_mask;
2249 if (*status & port->ignore_status_mask) {
2250 if (++ignored > 100)
2254 if (*status & UART_LSR_SPECIAL) {
2255 if (*status & UART_LSR_BI) {
2259 if (port->port.flags & ASYNC_SAK)
2261 } else if (*status & UART_LSR_PE) {
2263 port->icount.parity++;
2264 } else if (*status & UART_LSR_FE) {
2266 port->icount.frame++;
2267 } else if (*status & UART_LSR_OE) {
2269 port->icount.overrun++;
2273 tty_insert_flip_char(tty, ch, flag);
2275 if (cnt >= recv_room) {
2276 if (!port->ldisc_stop_rx)
2283 if (port->board->chip_flag)
2286 *status = inb(port->ioaddr + UART_LSR);
2287 } while (*status & UART_LSR_DR);
2290 mxvar_log.rxcnt[port->port.tty->index] += cnt;
2291 port->mon_data.rxcnt += cnt;
2292 port->mon_data.up_rxcnt += cnt;
2295 * We are called from an interrupt context with &port->slock
2296 * being held. Drop it temporarily in order to prevent
2297 * recursive locking.
2299 spin_unlock(&port->slock);
2300 tty_flip_buffer_push(tty);
2301 spin_lock(&port->slock);
2304 static void mxser_transmit_chars(struct mxser_port *port)
2309 outb(port->x_char, port->ioaddr + UART_TX);
2311 mxvar_log.txcnt[port->port.tty->index]++;
2312 port->mon_data.txcnt++;
2313 port->mon_data.up_txcnt++;
2318 if (port->port.xmit_buf == NULL)
2321 if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
2322 (port->port.tty->hw_stopped &&
2323 (port->type != PORT_16550A) &&
2324 (!port->board->chip_flag))) {
2325 port->IER &= ~UART_IER_THRI;
2326 outb(port->IER, port->ioaddr + UART_IER);
2330 cnt = port->xmit_cnt;
2331 count = port->xmit_fifo_size;
2333 outb(port->port.xmit_buf[port->xmit_tail++],
2334 port->ioaddr + UART_TX);
2335 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2336 if (--port->xmit_cnt <= 0)
2338 } while (--count > 0);
2339 mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
2341 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2342 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2343 port->icount.tx += (cnt - port->xmit_cnt);
2345 if (port->xmit_cnt < WAKEUP_CHARS)
2346 tty_wakeup(port->port.tty);
2348 if (port->xmit_cnt <= 0) {
2349 port->IER &= ~UART_IER_THRI;
2350 outb(port->IER, port->ioaddr + UART_IER);
2355 * This is the serial driver's generic interrupt routine
2357 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2360 struct mxser_board *brd = NULL;
2361 struct mxser_port *port;
2362 int max, irqbits, bits, msr;
2363 unsigned int int_cnt, pass_counter = 0;
2364 int handled = IRQ_NONE;
2366 for (i = 0; i < MXSER_BOARDS; i++)
2367 if (dev_id == &mxser_boards[i]) {
2372 if (i == MXSER_BOARDS)
2376 max = brd->info->nports;
2377 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2378 irqbits = inb(brd->vector) & brd->vector_mask;
2379 if (irqbits == brd->vector_mask)
2382 handled = IRQ_HANDLED;
2383 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2384 if (irqbits == brd->vector_mask)
2388 port = &brd->ports[i];
2391 spin_lock(&port->slock);
2393 iir = inb(port->ioaddr + UART_IIR);
2394 if (iir & UART_IIR_NO_INT)
2396 iir &= MOXA_MUST_IIR_MASK;
2397 if (!port->port.tty ||
2398 (port->port.flags & ASYNC_CLOSING) ||
2399 !(port->port.flags &
2400 ASYNC_INITIALIZED)) {
2401 status = inb(port->ioaddr + UART_LSR);
2402 outb(0x27, port->ioaddr + UART_FCR);
2403 inb(port->ioaddr + UART_MSR);
2407 status = inb(port->ioaddr + UART_LSR);
2409 if (status & UART_LSR_PE)
2410 port->err_shadow |= NPPI_NOTIFY_PARITY;
2411 if (status & UART_LSR_FE)
2412 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2413 if (status & UART_LSR_OE)
2415 NPPI_NOTIFY_HW_OVERRUN;
2416 if (status & UART_LSR_BI)
2417 port->err_shadow |= NPPI_NOTIFY_BREAK;
2419 if (port->board->chip_flag) {
2420 if (iir == MOXA_MUST_IIR_GDA ||
2421 iir == MOXA_MUST_IIR_RDA ||
2422 iir == MOXA_MUST_IIR_RTO ||
2423 iir == MOXA_MUST_IIR_LSR)
2424 mxser_receive_chars(port,
2428 status &= port->read_status_mask;
2429 if (status & UART_LSR_DR)
2430 mxser_receive_chars(port,
2433 msr = inb(port->ioaddr + UART_MSR);
2434 if (msr & UART_MSR_ANY_DELTA)
2435 mxser_check_modem_status(port, msr);
2437 if (port->board->chip_flag) {
2438 if (iir == 0x02 && (status &
2440 mxser_transmit_chars(port);
2442 if (status & UART_LSR_THRE)
2443 mxser_transmit_chars(port);
2445 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2446 spin_unlock(&port->slock);
2454 static const struct tty_operations mxser_ops = {
2456 .close = mxser_close,
2457 .write = mxser_write,
2458 .put_char = mxser_put_char,
2459 .flush_chars = mxser_flush_chars,
2460 .write_room = mxser_write_room,
2461 .chars_in_buffer = mxser_chars_in_buffer,
2462 .flush_buffer = mxser_flush_buffer,
2463 .ioctl = mxser_ioctl,
2464 .throttle = mxser_throttle,
2465 .unthrottle = mxser_unthrottle,
2466 .set_termios = mxser_set_termios,
2468 .start = mxser_start,
2469 .hangup = mxser_hangup,
2470 .break_ctl = mxser_rs_break,
2471 .wait_until_sent = mxser_wait_until_sent,
2472 .tiocmget = mxser_tiocmget,
2473 .tiocmset = mxser_tiocmset,
2477 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2480 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2484 free_irq(brd->irq, brd);
2485 if (pdev != NULL) { /* PCI */
2487 pci_release_region(pdev, 2);
2488 pci_release_region(pdev, 3);
2491 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2492 release_region(brd->vector, 1);
2496 static int __devinit mxser_initbrd(struct mxser_board *brd,
2497 struct pci_dev *pdev)
2499 struct mxser_port *info;
2503 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2505 for (i = 0; i < brd->info->nports; i++) {
2506 info = &brd->ports[i];
2507 tty_port_init(&info->port);
2510 info->ldisc_stop_rx = 0;
2512 /* Enhance mode enabled here */
2513 if (brd->chip_flag != MOXA_OTHER_UART)
2514 mxser_enable_must_enchance_mode(info->ioaddr);
2516 info->port.flags = ASYNC_SHARE_IRQ;
2517 info->type = brd->uart_type;
2519 process_txrx_fifo(info);
2521 info->custom_divisor = info->baud_base * 16;
2522 info->port.close_delay = 5 * HZ / 10;
2523 info->port.closing_wait = 30 * HZ;
2524 info->normal_termios = mxvar_sdriver->init_termios;
2525 init_waitqueue_head(&info->delta_msr_wait);
2526 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2527 info->err_shadow = 0;
2528 spin_lock_init(&info->slock);
2530 /* before set INT ISR, disable all int */
2531 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2532 info->ioaddr + UART_IER);
2535 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2538 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2539 "conflict with another device.\n",
2540 brd->info->name, brd->irq);
2541 /* We hold resources, we need to release them. */
2542 mxser_release_res(brd, pdev, 0);
2547 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2550 unsigned short regs[16], irq;
2551 unsigned char scratch, scratch2;
2553 brd->chip_flag = MOXA_OTHER_UART;
2555 id = mxser_read_register(cap, regs);
2558 brd->info = &mxser_cards[0];
2561 brd->info = &mxser_cards[1];
2563 case CI104J_ASIC_ID:
2564 brd->info = &mxser_cards[2];
2567 brd->info = &mxser_cards[5];
2570 brd->info = &mxser_cards[6];
2573 brd->info = &mxser_cards[7];
2580 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2581 Flag-hack checks if configuration should be read as 2-port here. */
2582 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2583 irq = regs[9] & 0xF000;
2584 irq = irq | (irq >> 4);
2585 if (irq != (regs[9] & 0xFF00))
2586 return MXSER_ERR_IRQ_CONFLIT;
2587 } else if (brd->info->nports == 4) {
2588 irq = regs[9] & 0xF000;
2589 irq = irq | (irq >> 4);
2590 irq = irq | (irq >> 8);
2592 return MXSER_ERR_IRQ_CONFLIT;
2593 } else if (brd->info->nports == 8) {
2594 irq = regs[9] & 0xF000;
2595 irq = irq | (irq >> 4);
2596 irq = irq | (irq >> 8);
2597 if ((irq != regs[9]) || (irq != regs[10]))
2598 return MXSER_ERR_IRQ_CONFLIT;
2602 return MXSER_ERR_IRQ;
2603 brd->irq = ((int)(irq & 0xF000) >> 12);
2604 for (i = 0; i < 8; i++)
2605 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2606 if ((regs[12] & 0x80) == 0)
2607 return MXSER_ERR_VECTOR;
2608 brd->vector = (int)regs[11]; /* interrupt vector */
2610 brd->vector_mask = 0x00FF;
2612 brd->vector_mask = 0x000F;
2613 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2614 if (regs[12] & bits) {
2615 brd->ports[i].baud_base = 921600;
2616 brd->ports[i].max_baud = 921600;
2618 brd->ports[i].baud_base = 115200;
2619 brd->ports[i].max_baud = 115200;
2622 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2623 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2624 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2625 outb(scratch2, cap + UART_LCR);
2626 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2627 scratch = inb(cap + UART_IIR);
2630 brd->uart_type = PORT_16550A;
2632 brd->uart_type = PORT_16450;
2633 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2635 return MXSER_ERR_IOADDR;
2636 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2637 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2638 return MXSER_ERR_VECTOR;
2640 return brd->info->nports;
2643 static int __devinit mxser_probe(struct pci_dev *pdev,
2644 const struct pci_device_id *ent)
2647 struct mxser_board *brd;
2649 unsigned long ioaddress;
2650 int retval = -EINVAL;
2652 for (i = 0; i < MXSER_BOARDS; i++)
2653 if (mxser_boards[i].info == NULL)
2656 if (i >= MXSER_BOARDS) {
2657 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2658 "(maximum %d), board not configured\n", MXSER_BOARDS);
2662 brd = &mxser_boards[i];
2663 brd->idx = i * MXSER_PORTS_PER_BOARD;
2664 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2665 mxser_cards[ent->driver_data].name,
2666 pdev->bus->number, PCI_SLOT(pdev->devfn));
2668 retval = pci_enable_device(pdev);
2670 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2675 ioaddress = pci_resource_start(pdev, 2);
2676 retval = pci_request_region(pdev, 2, "mxser(IO)");
2680 brd->info = &mxser_cards[ent->driver_data];
2681 for (i = 0; i < brd->info->nports; i++)
2682 brd->ports[i].ioaddr = ioaddress + 8 * i;
2685 ioaddress = pci_resource_start(pdev, 3);
2686 retval = pci_request_region(pdev, 3, "mxser(vector)");
2689 brd->vector = ioaddress;
2692 brd->irq = pdev->irq;
2694 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2695 brd->uart_type = PORT_16550A;
2696 brd->vector_mask = 0;
2698 for (i = 0; i < brd->info->nports; i++) {
2699 for (j = 0; j < UART_INFO_NUM; j++) {
2700 if (Gpci_uart_info[j].type == brd->chip_flag) {
2701 brd->ports[i].max_baud =
2702 Gpci_uart_info[j].max_baud;
2704 /* exception....CP-102 */
2705 if (brd->info->flags & MXSER_HIGHBAUD)
2706 brd->ports[i].max_baud = 921600;
2712 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2713 for (i = 0; i < brd->info->nports; i++) {
2715 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2717 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2719 outb(0, ioaddress + 4); /* default set to RS232 mode */
2720 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2723 for (i = 0; i < brd->info->nports; i++) {
2724 brd->vector_mask |= (1 << i);
2725 brd->ports[i].baud_base = 921600;
2728 /* mxser_initbrd will hook ISR. */
2729 retval = mxser_initbrd(brd, pdev);
2733 for (i = 0; i < brd->info->nports; i++)
2734 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2736 pci_set_drvdata(pdev, brd);
2740 pci_release_region(pdev, 2);
2750 static void __devexit mxser_remove(struct pci_dev *pdev)
2752 struct mxser_board *brd = pci_get_drvdata(pdev);
2755 for (i = 0; i < brd->info->nports; i++)
2756 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2758 mxser_release_res(brd, pdev, 1);
2762 static struct pci_driver mxser_driver = {
2764 .id_table = mxser_pcibrds,
2765 .probe = mxser_probe,
2766 .remove = __devexit_p(mxser_remove)
2769 static int __init mxser_module_init(void)
2771 struct mxser_board *brd;
2773 unsigned int i, m, isaloop;
2776 pr_debug("Loading module mxser ...\n");
2778 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2782 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2785 /* Initialize the tty_driver structure */
2786 mxvar_sdriver->owner = THIS_MODULE;
2787 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2788 mxvar_sdriver->name = "ttyMI";
2789 mxvar_sdriver->major = ttymajor;
2790 mxvar_sdriver->minor_start = 0;
2791 mxvar_sdriver->num = MXSER_PORTS + 1;
2792 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2793 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2794 mxvar_sdriver->init_termios = tty_std_termios;
2795 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2796 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2797 tty_set_operations(mxvar_sdriver, &mxser_ops);
2799 retval = tty_register_driver(mxvar_sdriver);
2801 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2809 /* Start finding ISA boards here */
2810 for (isaloop = 0; isaloop < 2; isaloop++)
2811 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2813 cap = mxserBoardCAP[b]; /* predefined */
2815 cap = ioaddr[b]; /* module param */
2820 brd = &mxser_boards[m];
2821 retval = mxser_get_ISA_conf(cap, brd);
2824 printk(KERN_INFO "Found MOXA %s board "
2826 brd->info->name, ioaddr[b]);
2829 if (retval == MXSER_ERR_IRQ)
2830 printk(KERN_ERR "Invalid interrupt "
2831 "number, board not "
2833 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2834 printk(KERN_ERR "Invalid interrupt "
2835 "number, board not "
2837 else if (retval == MXSER_ERR_VECTOR)
2838 printk(KERN_ERR "Invalid interrupt "
2839 "vector, board not "
2841 else if (retval == MXSER_ERR_IOADDR)
2842 printk(KERN_ERR "Invalid I/O address, "
2843 "board not configured\n");
2849 /* mxser_initbrd will hook ISR. */
2850 if (mxser_initbrd(brd, NULL) < 0) {
2855 brd->idx = m * MXSER_PORTS_PER_BOARD;
2856 for (i = 0; i < brd->info->nports; i++)
2857 tty_register_device(mxvar_sdriver, brd->idx + i,
2863 retval = pci_register_driver(&mxser_driver);
2865 printk(KERN_ERR "Can't register pci driver\n");
2869 } /* else: we have some ISA cards under control */
2872 pr_debug("Done.\n");
2876 tty_unregister_driver(mxvar_sdriver);
2878 put_tty_driver(mxvar_sdriver);
2882 static void __exit mxser_module_exit(void)
2886 pr_debug("Unloading module mxser ...\n");
2888 pci_unregister_driver(&mxser_driver);
2890 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2891 if (mxser_boards[i].info != NULL)
2892 for (j = 0; j < mxser_boards[i].info->nports; j++)
2893 tty_unregister_device(mxvar_sdriver,
2894 mxser_boards[i].idx + j);
2895 tty_unregister_driver(mxvar_sdriver);
2896 put_tty_driver(mxvar_sdriver);
2898 for (i = 0; i < MXSER_BOARDS; i++)
2899 if (mxser_boards[i].info != NULL)
2900 mxser_release_res(&mxser_boards[i], NULL, 1);
2902 pr_debug("Done.\n");
2905 module_init(mxser_module_init);
2906 module_exit(mxser_module_exit);