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@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
19 * - Fixed x86_64 cleanness
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 "2.0.4" /* 1.12 */
51 #define MXSERMAJOR 174
53 #define MXSER_BOARDS 4 /* Max. boards */
54 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
55 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56 #define MXSER_ISR_PASS_LIMIT 100
58 /*CheckIsMoxaMust return value*/
59 #define MOXA_OTHER_UART 0x00
60 #define MOXA_MUST_MU150_HWID 0x01
61 #define MOXA_MUST_MU860_HWID 0x02
63 #define WAKEUP_CHARS 256
65 #define UART_MCR_AFE 0x20
66 #define UART_LSR_SPECIAL 0x1E
68 #define PCI_DEVICE_ID_POS104UL 0x1044
69 #define PCI_DEVICE_ID_CB108 0x1080
70 #define PCI_DEVICE_ID_CP102UF 0x1023
71 #define PCI_DEVICE_ID_CB114 0x1142
72 #define PCI_DEVICE_ID_CP114UL 0x1143
73 #define PCI_DEVICE_ID_CB134I 0x1341
74 #define PCI_DEVICE_ID_CP138U 0x1380
77 #define C168_ASIC_ID 1
78 #define C104_ASIC_ID 2
79 #define C102_ASIC_ID 0xB
80 #define CI132_ASIC_ID 4
81 #define CI134_ASIC_ID 3
82 #define CI104J_ASIC_ID 5
84 #define MXSER_HIGHBAUD 1
87 /* This is only for PCI */
97 } Gpci_uart_info[] = {
98 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
99 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
100 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
102 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
104 struct mxser_cardinfo {
110 static const struct mxser_cardinfo mxser_cards[] = {
111 /* 0*/ { "C168 series", 8, },
112 { "C104 series", 4, },
113 { "CI-104J series", 4, },
114 { "C168H/PCI series", 8, },
115 { "C104H/PCI series", 4, },
116 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
117 { "CI-132 series", 4, MXSER_HAS2 },
118 { "CI-134 series", 4, },
119 { "CP-132 series", 2, },
120 { "CP-114 series", 4, },
121 /*10*/ { "CT-114 series", 4, },
122 { "CP-102 series", 2, MXSER_HIGHBAUD },
123 { "CP-104U series", 4, },
124 { "CP-168U series", 8, },
125 { "CP-132U series", 2, },
126 /*15*/ { "CP-134U series", 4, },
127 { "CP-104JU series", 4, },
128 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
129 { "CP-118U series", 8, },
130 { "CP-102UL series", 2, },
131 /*20*/ { "CP-102U series", 2, },
132 { "CP-118EL series", 8, },
133 { "CP-168EL series", 8, },
134 { "CP-104EL series", 4, },
135 { "CB-108 series", 8, },
136 /*25*/ { "CB-114 series", 4, },
137 { "CB-134I series", 4, },
138 { "CP-138U series", 8, },
139 { "POS-104UL series", 4, },
140 { "CP-114UL series", 4, },
141 /*30*/ { "CP-102UF series", 2, }
144 /* driver_data correspond to the lines in the structure above
145 see also ISA probe function before you change something */
146 static struct pci_device_id mxser_pcibrds[] = {
147 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
148 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
174 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
176 static unsigned long ioaddr[MXSER_BOARDS];
177 static int ttymajor = MXSERMAJOR;
179 /* Variables for insmod */
181 MODULE_AUTHOR("Casper Yang");
182 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
183 module_param_array(ioaddr, ulong, NULL, 0);
184 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
185 module_param(ttymajor, int, 0);
186 MODULE_LICENSE("GPL");
190 unsigned long rxcnt[MXSER_PORTS];
191 unsigned long txcnt[MXSER_PORTS];
197 unsigned long up_rxcnt;
198 unsigned long up_txcnt;
200 unsigned char hold_reason;
203 struct mxser_mon_ext {
204 unsigned long rx_cnt[32];
205 unsigned long tx_cnt[32];
206 unsigned long up_rxcnt[32];
207 unsigned long up_txcnt[32];
208 int modem_status[32];
222 struct tty_port port;
223 struct mxser_board *board;
225 unsigned long ioaddr;
226 unsigned long opmode_ioaddr;
230 int rx_trigger; /* Rx fifo trigger level */
232 int baud_base; /* max. speed */
233 int type; /* UART type */
235 int x_char; /* xon/xoff character */
236 int IER; /* Interrupt Enable Register */
237 int MCR; /* Modem control register */
239 unsigned char stop_rx;
240 unsigned char ldisc_stop_rx;
243 unsigned char err_shadow;
245 struct async_icount icount; /* kernel counters for 4 input interrupts */
248 int read_status_mask;
249 int ignore_status_mask;
255 struct ktermios normal_termios;
257 struct mxser_mon mon_data;
260 wait_queue_head_t delta_msr_wait;
266 const struct mxser_cardinfo *info;
267 unsigned long vector;
268 unsigned long vector_mask;
273 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
276 struct mxser_mstatus {
284 static struct mxser_board mxser_boards[MXSER_BOARDS];
285 static struct tty_driver *mxvar_sdriver;
286 static struct mxser_log mxvar_log;
287 static int mxser_set_baud_method[MXSER_PORTS + 1];
289 static void mxser_enable_must_enchance_mode(unsigned long baseio)
294 oldlcr = inb(baseio + UART_LCR);
295 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
297 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
298 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
300 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
301 outb(oldlcr, baseio + UART_LCR);
304 static void mxser_disable_must_enchance_mode(unsigned long baseio)
309 oldlcr = inb(baseio + UART_LCR);
310 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
312 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
313 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
315 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
316 outb(oldlcr, baseio + UART_LCR);
319 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
324 oldlcr = inb(baseio + UART_LCR);
325 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
327 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
328 efr &= ~MOXA_MUST_EFR_BANK_MASK;
329 efr |= MOXA_MUST_EFR_BANK0;
331 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
332 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
333 outb(oldlcr, baseio + UART_LCR);
336 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
341 oldlcr = inb(baseio + UART_LCR);
342 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
344 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
345 efr &= ~MOXA_MUST_EFR_BANK_MASK;
346 efr |= MOXA_MUST_EFR_BANK0;
348 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
349 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
350 outb(oldlcr, baseio + UART_LCR);
353 static void mxser_set_must_fifo_value(struct mxser_port *info)
358 oldlcr = inb(info->ioaddr + UART_LCR);
359 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
361 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
362 efr &= ~MOXA_MUST_EFR_BANK_MASK;
363 efr |= MOXA_MUST_EFR_BANK1;
365 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
366 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
367 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
368 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
369 outb(oldlcr, info->ioaddr + UART_LCR);
372 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
377 oldlcr = inb(baseio + UART_LCR);
378 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
380 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
381 efr &= ~MOXA_MUST_EFR_BANK_MASK;
382 efr |= MOXA_MUST_EFR_BANK2;
384 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
385 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
386 outb(oldlcr, baseio + UART_LCR);
389 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
394 oldlcr = inb(baseio + UART_LCR);
395 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
397 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
398 efr &= ~MOXA_MUST_EFR_BANK_MASK;
399 efr |= MOXA_MUST_EFR_BANK2;
401 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
402 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
403 outb(oldlcr, baseio + UART_LCR);
406 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
411 oldlcr = inb(baseio + UART_LCR);
412 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
414 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
415 efr &= ~MOXA_MUST_EFR_SF_MASK;
417 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
418 outb(oldlcr, baseio + UART_LCR);
421 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
426 oldlcr = inb(baseio + UART_LCR);
427 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
429 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
430 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
431 efr |= MOXA_MUST_EFR_SF_TX1;
433 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
434 outb(oldlcr, baseio + UART_LCR);
437 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
442 oldlcr = inb(baseio + UART_LCR);
443 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
445 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
446 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
448 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
449 outb(oldlcr, baseio + UART_LCR);
452 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
457 oldlcr = inb(baseio + UART_LCR);
458 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
460 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
461 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
462 efr |= MOXA_MUST_EFR_SF_RX1;
464 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
465 outb(oldlcr, baseio + UART_LCR);
468 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
473 oldlcr = inb(baseio + UART_LCR);
474 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
476 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
477 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
479 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
480 outb(oldlcr, baseio + UART_LCR);
484 static int __devinit CheckIsMoxaMust(unsigned long io)
489 outb(0, io + UART_LCR);
490 mxser_disable_must_enchance_mode(io);
491 oldmcr = inb(io + UART_MCR);
492 outb(0, io + UART_MCR);
493 mxser_set_must_xon1_value(io, 0x11);
494 if ((hwid = inb(io + UART_MCR)) != 0) {
495 outb(oldmcr, io + UART_MCR);
496 return MOXA_OTHER_UART;
499 mxser_get_must_hardware_id(io, &hwid);
500 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
501 if (hwid == Gpci_uart_info[i].type)
504 return MOXA_OTHER_UART;
508 static void process_txrx_fifo(struct mxser_port *info)
512 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
513 info->rx_trigger = 1;
514 info->rx_high_water = 1;
515 info->rx_low_water = 1;
516 info->xmit_fifo_size = 1;
518 for (i = 0; i < UART_INFO_NUM; i++)
519 if (info->board->chip_flag == Gpci_uart_info[i].type) {
520 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
521 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
522 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
523 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
528 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
530 static unsigned char mxser_msr[MXSER_PORTS + 1];
531 unsigned char status = 0;
533 status = inb(baseaddr + UART_MSR);
535 mxser_msr[port] &= 0x0F;
536 mxser_msr[port] |= status;
537 status = mxser_msr[port];
544 static int mxser_carrier_raised(struct tty_port *port)
546 struct mxser_port *mp = container_of(port, struct mxser_port, port);
547 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
550 static void mxser_raise_dtr_rts(struct tty_port *port)
552 struct mxser_port *mp = container_of(port, struct mxser_port, port);
555 spin_lock_irqsave(&mp->slock, flags);
556 outb(inb(mp->ioaddr + UART_MCR) |
557 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
558 spin_unlock_irqrestore(&mp->slock, flags);
561 static int mxser_set_baud(struct tty_struct *tty, long newspd)
563 struct mxser_port *info = tty->driver_data;
570 if (newspd > info->max_baud)
574 quot = 2 * info->baud_base / 269;
575 tty_encode_baud_rate(tty, 134, 134);
577 quot = info->baud_base / newspd;
580 baud = info->baud_base/quot;
581 tty_encode_baud_rate(tty, baud, baud);
586 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
587 info->timeout += HZ / 50; /* Add .02 seconds of slop */
590 info->MCR |= UART_MCR_DTR;
591 outb(info->MCR, info->ioaddr + UART_MCR);
593 info->MCR &= ~UART_MCR_DTR;
594 outb(info->MCR, info->ioaddr + UART_MCR);
598 cval = inb(info->ioaddr + UART_LCR);
600 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
602 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
603 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
604 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
607 if (C_BAUD(tty) == BOTHER) {
608 quot = info->baud_base % newspd;
610 if (quot % newspd > newspd / 2) {
616 mxser_set_must_enum_value(info->ioaddr, quot);
619 mxser_set_must_enum_value(info->ioaddr, 0);
625 * This routine is called to set the UART divisor registers to match
626 * the specified baud rate for a serial port.
628 static int mxser_change_speed(struct tty_struct *tty,
629 struct ktermios *old_termios)
631 struct mxser_port *info = tty->driver_data;
632 unsigned cflag, cval, fcr;
634 unsigned char status;
636 cflag = tty->termios->c_cflag;
640 if (mxser_set_baud_method[tty->index] == 0)
641 mxser_set_baud(tty, tty_get_baud_rate(tty));
643 /* byte size and parity */
644 switch (cflag & CSIZE) {
659 break; /* too keep GCC shut... */
664 cval |= UART_LCR_PARITY;
665 if (!(cflag & PARODD))
666 cval |= UART_LCR_EPAR;
668 cval |= UART_LCR_SPAR;
670 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
671 if (info->board->chip_flag) {
672 fcr = UART_FCR_ENABLE_FIFO;
673 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
674 mxser_set_must_fifo_value(info);
678 fcr = UART_FCR_ENABLE_FIFO;
679 if (info->board->chip_flag) {
680 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
681 mxser_set_must_fifo_value(info);
683 switch (info->rx_trigger) {
685 fcr |= UART_FCR_TRIGGER_1;
688 fcr |= UART_FCR_TRIGGER_4;
691 fcr |= UART_FCR_TRIGGER_8;
694 fcr |= UART_FCR_TRIGGER_14;
700 /* CTS flow control flag and modem status interrupts */
701 info->IER &= ~UART_IER_MSI;
702 info->MCR &= ~UART_MCR_AFE;
703 if (cflag & CRTSCTS) {
704 info->port.flags |= ASYNC_CTS_FLOW;
705 info->IER |= UART_IER_MSI;
706 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
707 info->MCR |= UART_MCR_AFE;
709 status = inb(info->ioaddr + UART_MSR);
710 if (tty->hw_stopped) {
711 if (status & UART_MSR_CTS) {
713 if (info->type != PORT_16550A &&
714 !info->board->chip_flag) {
715 outb(info->IER & ~UART_IER_THRI,
718 info->IER |= UART_IER_THRI;
719 outb(info->IER, info->ioaddr +
725 if (!(status & UART_MSR_CTS)) {
727 if ((info->type != PORT_16550A) &&
728 (!info->board->chip_flag)) {
729 info->IER &= ~UART_IER_THRI;
730 outb(info->IER, info->ioaddr +
737 info->port.flags &= ~ASYNC_CTS_FLOW;
739 outb(info->MCR, info->ioaddr + UART_MCR);
740 if (cflag & CLOCAL) {
741 info->port.flags &= ~ASYNC_CHECK_CD;
743 info->port.flags |= ASYNC_CHECK_CD;
744 info->IER |= UART_IER_MSI;
746 outb(info->IER, info->ioaddr + UART_IER);
749 * Set up parity check flag
751 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
753 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
754 if (I_BRKINT(tty) || I_PARMRK(tty))
755 info->read_status_mask |= UART_LSR_BI;
757 info->ignore_status_mask = 0;
760 info->ignore_status_mask |= UART_LSR_BI;
761 info->read_status_mask |= UART_LSR_BI;
763 * If we're ignore parity and break indicators, ignore
764 * overruns too. (For real raw support).
767 info->ignore_status_mask |=
771 info->read_status_mask |=
777 if (info->board->chip_flag) {
778 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
779 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
781 mxser_enable_must_rx_software_flow_control(
784 mxser_disable_must_rx_software_flow_control(
788 mxser_enable_must_tx_software_flow_control(
791 mxser_disable_must_tx_software_flow_control(
797 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
798 outb(cval, info->ioaddr + UART_LCR);
803 static void mxser_check_modem_status(struct tty_struct *tty,
804 struct mxser_port *port, int status)
806 /* update input line counters */
807 if (status & UART_MSR_TERI)
809 if (status & UART_MSR_DDSR)
811 if (status & UART_MSR_DDCD)
813 if (status & UART_MSR_DCTS)
815 port->mon_data.modem_status = status;
816 wake_up_interruptible(&port->delta_msr_wait);
818 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
819 if (status & UART_MSR_DCD)
820 wake_up_interruptible(&port->port.open_wait);
823 tty = tty_port_tty_get(&port->port);
824 if (port->port.flags & ASYNC_CTS_FLOW) {
825 if (tty->hw_stopped) {
826 if (status & UART_MSR_CTS) {
829 if ((port->type != PORT_16550A) &&
830 (!port->board->chip_flag)) {
831 outb(port->IER & ~UART_IER_THRI,
832 port->ioaddr + UART_IER);
833 port->IER |= UART_IER_THRI;
834 outb(port->IER, port->ioaddr +
840 if (!(status & UART_MSR_CTS)) {
842 if (port->type != PORT_16550A &&
843 !port->board->chip_flag) {
844 port->IER &= ~UART_IER_THRI;
845 outb(port->IER, port->ioaddr +
853 static int mxser_startup(struct tty_struct *tty)
855 struct mxser_port *info = tty->driver_data;
859 page = __get_free_page(GFP_KERNEL);
863 spin_lock_irqsave(&info->slock, flags);
865 if (info->port.flags & ASYNC_INITIALIZED) {
867 spin_unlock_irqrestore(&info->slock, flags);
871 if (!info->ioaddr || !info->type) {
872 set_bit(TTY_IO_ERROR, &tty->flags);
874 spin_unlock_irqrestore(&info->slock, flags);
877 if (info->port.xmit_buf)
880 info->port.xmit_buf = (unsigned char *) page;
883 * Clear the FIFO buffers and disable them
884 * (they will be reenabled in mxser_change_speed())
886 if (info->board->chip_flag)
887 outb((UART_FCR_CLEAR_RCVR |
888 UART_FCR_CLEAR_XMIT |
889 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
891 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
892 info->ioaddr + UART_FCR);
895 * At this point there's no way the LSR could still be 0xFF;
896 * if it is, then bail out, because there's likely no UART
899 if (inb(info->ioaddr + UART_LSR) == 0xff) {
900 spin_unlock_irqrestore(&info->slock, flags);
901 if (capable(CAP_SYS_ADMIN)) {
903 set_bit(TTY_IO_ERROR, &tty->flags);
910 * Clear the interrupt registers.
912 (void) inb(info->ioaddr + UART_LSR);
913 (void) inb(info->ioaddr + UART_RX);
914 (void) inb(info->ioaddr + UART_IIR);
915 (void) inb(info->ioaddr + UART_MSR);
918 * Now, initialize the UART
920 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
921 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
922 outb(info->MCR, info->ioaddr + UART_MCR);
925 * Finally, enable interrupts
927 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
929 if (info->board->chip_flag)
930 info->IER |= MOXA_MUST_IER_EGDAI;
931 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
934 * And clear the interrupt registers again for luck.
936 (void) inb(info->ioaddr + UART_LSR);
937 (void) inb(info->ioaddr + UART_RX);
938 (void) inb(info->ioaddr + UART_IIR);
939 (void) inb(info->ioaddr + UART_MSR);
941 clear_bit(TTY_IO_ERROR, &tty->flags);
942 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
945 * and set the speed of the serial port
947 mxser_change_speed(tty, NULL);
948 info->port.flags |= ASYNC_INITIALIZED;
949 spin_unlock_irqrestore(&info->slock, flags);
955 * This routine will shutdown a serial port; interrupts maybe disabled, and
956 * DTR is dropped if the hangup on close termio flag is on.
958 static void mxser_shutdown(struct tty_struct *tty)
960 struct mxser_port *info = tty->driver_data;
963 if (!(info->port.flags & ASYNC_INITIALIZED))
966 spin_lock_irqsave(&info->slock, flags);
969 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
970 * here so the queue might never be waken up
972 wake_up_interruptible(&info->delta_msr_wait);
975 * Free the IRQ, if necessary
977 if (info->port.xmit_buf) {
978 free_page((unsigned long) info->port.xmit_buf);
979 info->port.xmit_buf = NULL;
983 outb(0x00, info->ioaddr + UART_IER);
985 if (tty->termios->c_cflag & HUPCL)
986 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
987 outb(info->MCR, info->ioaddr + UART_MCR);
989 /* clear Rx/Tx FIFO's */
990 if (info->board->chip_flag)
991 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
992 MOXA_MUST_FCR_GDA_MODE_ENABLE,
993 info->ioaddr + UART_FCR);
995 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
996 info->ioaddr + UART_FCR);
998 /* read data port to reset things */
999 (void) inb(info->ioaddr + UART_RX);
1001 set_bit(TTY_IO_ERROR, &tty->flags);
1003 info->port.flags &= ~ASYNC_INITIALIZED;
1005 if (info->board->chip_flag)
1006 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1008 spin_unlock_irqrestore(&info->slock, flags);
1012 * This routine is called whenever a serial port is opened. It
1013 * enables interrupts for a serial port, linking in its async structure into
1014 * the IRQ chain. It also performs the serial-specific
1015 * initialization for the tty structure.
1017 static int mxser_open(struct tty_struct *tty, struct file *filp)
1019 struct mxser_port *info;
1020 unsigned long flags;
1024 if (line == MXSER_PORTS)
1026 if (line < 0 || line > MXSER_PORTS)
1028 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1032 tty->driver_data = info;
1033 tty_port_tty_set(&info->port, tty);
1035 * Start up serial port
1037 spin_lock_irqsave(&info->port.lock, flags);
1039 spin_unlock_irqrestore(&info->port.lock, flags);
1040 retval = mxser_startup(tty);
1044 retval = tty_port_block_til_ready(&info->port, tty, filp);
1048 /* unmark here for very high baud rate (ex. 921600 bps) used */
1049 tty->low_latency = 1;
1053 static void mxser_flush_buffer(struct tty_struct *tty)
1055 struct mxser_port *info = tty->driver_data;
1057 unsigned long flags;
1060 spin_lock_irqsave(&info->slock, flags);
1061 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1063 fcr = inb(info->ioaddr + UART_FCR);
1064 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1065 info->ioaddr + UART_FCR);
1066 outb(fcr, info->ioaddr + UART_FCR);
1068 spin_unlock_irqrestore(&info->slock, flags);
1075 * This routine is called when the serial port gets closed. First, we
1076 * wait for the last remaining data to be sent. Then, we unlink its
1077 * async structure from the interrupt chain if necessary, and we free
1078 * that IRQ if nothing is left in the chain.
1080 static void mxser_close(struct tty_struct *tty, struct file *filp)
1082 struct mxser_port *info = tty->driver_data;
1084 unsigned long timeout;
1085 unsigned long flags;
1087 if (tty->index == MXSER_PORTS)
1092 spin_lock_irqsave(&info->port.lock, flags);
1094 if (tty_hung_up_p(filp)) {
1095 spin_unlock_irqrestore(&info->port.lock, flags);
1098 if ((tty->count == 1) && (info->port.count != 1)) {
1100 * Uh, oh. tty->count is 1, which means that the tty
1101 * structure will be freed. Info->port.count should always
1102 * be one in these conditions. If it's greater than
1103 * one, we've got real problems, since it means the
1104 * serial port won't be shutdown.
1106 printk(KERN_ERR "mxser_close: bad serial port count; "
1107 "tty->count is 1, info->port.count is %d\n", info->port.count);
1108 info->port.count = 1;
1110 if (--info->port.count < 0) {
1111 printk(KERN_ERR "mxser_close: bad serial port count for "
1112 "ttys%d: %d\n", tty->index, info->port.count);
1113 info->port.count = 0;
1115 if (info->port.count) {
1116 spin_unlock_irqrestore(&info->port.lock, flags);
1119 info->port.flags |= ASYNC_CLOSING;
1120 spin_unlock_irqrestore(&info->port.lock, flags);
1122 * Save the termios structure, since this port may have
1123 * separate termios for callout and dialin.
1125 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1126 info->normal_termios = *tty->termios;
1128 * Now we wait for the transmit buffer to clear; and we notify
1129 * the line discipline to only process XON/XOFF characters.
1132 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1133 tty_wait_until_sent(tty, info->port.closing_wait);
1135 * At this point we stop accepting input. To do this, we
1136 * disable the receive line status interrupts, and tell the
1137 * interrupt driver to stop checking the data ready bit in the
1138 * line status register.
1140 info->IER &= ~UART_IER_RLSI;
1141 if (info->board->chip_flag)
1142 info->IER &= ~MOXA_MUST_RECV_ISR;
1144 if (info->port.flags & ASYNC_INITIALIZED) {
1145 outb(info->IER, info->ioaddr + UART_IER);
1147 * Before we drop DTR, make sure the UART transmitter
1148 * has completely drained; this is especially
1149 * important if there is a transmit FIFO!
1151 timeout = jiffies + HZ;
1152 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1153 schedule_timeout_interruptible(5);
1154 if (time_after(jiffies, timeout))
1158 mxser_shutdown(tty);
1160 mxser_flush_buffer(tty);
1161 tty_ldisc_flush(tty);
1164 tty_port_tty_set(&info->port, NULL);
1165 if (info->port.blocked_open) {
1166 if (info->port.close_delay)
1167 schedule_timeout_interruptible(info->port.close_delay);
1168 wake_up_interruptible(&info->port.open_wait);
1171 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1174 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1177 struct mxser_port *info = tty->driver_data;
1178 unsigned long flags;
1180 if (!info->port.xmit_buf)
1184 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1185 SERIAL_XMIT_SIZE - info->xmit_head));
1189 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1190 spin_lock_irqsave(&info->slock, flags);
1191 info->xmit_head = (info->xmit_head + c) &
1192 (SERIAL_XMIT_SIZE - 1);
1193 info->xmit_cnt += c;
1194 spin_unlock_irqrestore(&info->slock, flags);
1201 if (info->xmit_cnt && !tty->stopped) {
1202 if (!tty->hw_stopped ||
1203 (info->type == PORT_16550A) ||
1204 (info->board->chip_flag)) {
1205 spin_lock_irqsave(&info->slock, flags);
1206 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1208 info->IER |= UART_IER_THRI;
1209 outb(info->IER, info->ioaddr + UART_IER);
1210 spin_unlock_irqrestore(&info->slock, flags);
1216 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1218 struct mxser_port *info = tty->driver_data;
1219 unsigned long flags;
1221 if (!info->port.xmit_buf)
1224 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1227 spin_lock_irqsave(&info->slock, flags);
1228 info->port.xmit_buf[info->xmit_head++] = ch;
1229 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1231 spin_unlock_irqrestore(&info->slock, flags);
1232 if (!tty->stopped) {
1233 if (!tty->hw_stopped ||
1234 (info->type == PORT_16550A) ||
1235 info->board->chip_flag) {
1236 spin_lock_irqsave(&info->slock, flags);
1237 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1238 info->IER |= UART_IER_THRI;
1239 outb(info->IER, info->ioaddr + UART_IER);
1240 spin_unlock_irqrestore(&info->slock, flags);
1247 static void mxser_flush_chars(struct tty_struct *tty)
1249 struct mxser_port *info = tty->driver_data;
1250 unsigned long flags;
1252 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1253 (tty->hw_stopped && info->type != PORT_16550A &&
1254 !info->board->chip_flag))
1257 spin_lock_irqsave(&info->slock, flags);
1259 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1260 info->IER |= UART_IER_THRI;
1261 outb(info->IER, info->ioaddr + UART_IER);
1263 spin_unlock_irqrestore(&info->slock, flags);
1266 static int mxser_write_room(struct tty_struct *tty)
1268 struct mxser_port *info = tty->driver_data;
1271 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1272 return ret < 0 ? 0 : ret;
1275 static int mxser_chars_in_buffer(struct tty_struct *tty)
1277 struct mxser_port *info = tty->driver_data;
1278 return info->xmit_cnt;
1282 * ------------------------------------------------------------
1283 * friends of mxser_ioctl()
1284 * ------------------------------------------------------------
1286 static int mxser_get_serial_info(struct tty_struct *tty,
1287 struct serial_struct __user *retinfo)
1289 struct mxser_port *info = tty->driver_data;
1290 struct serial_struct tmp = {
1293 .port = info->ioaddr,
1294 .irq = info->board->irq,
1295 .flags = info->port.flags,
1296 .baud_base = info->baud_base,
1297 .close_delay = info->port.close_delay,
1298 .closing_wait = info->port.closing_wait,
1299 .custom_divisor = info->custom_divisor,
1302 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1307 static int mxser_set_serial_info(struct tty_struct *tty,
1308 struct serial_struct __user *new_info)
1310 struct mxser_port *info = tty->driver_data;
1311 struct serial_struct new_serial;
1313 unsigned long sl_flags;
1317 if (!new_info || !info->ioaddr)
1319 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1322 if (new_serial.irq != info->board->irq ||
1323 new_serial.port != info->ioaddr)
1326 flags = info->port.flags & ASYNC_SPD_MASK;
1328 if (!capable(CAP_SYS_ADMIN)) {
1329 if ((new_serial.baud_base != info->baud_base) ||
1330 (new_serial.close_delay != info->port.close_delay) ||
1331 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1333 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1334 (new_serial.flags & ASYNC_USR_MASK));
1337 * OK, past this point, all the error checking has been done.
1338 * At this point, we start making changes.....
1340 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1341 (new_serial.flags & ASYNC_FLAGS));
1342 info->port.close_delay = new_serial.close_delay * HZ / 100;
1343 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1344 tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)
1346 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1347 (new_serial.baud_base != info->baud_base ||
1348 new_serial.custom_divisor !=
1349 info->custom_divisor)) {
1350 baud = new_serial.baud_base / new_serial.custom_divisor;
1351 tty_encode_baud_rate(tty, baud, baud);
1355 info->type = new_serial.type;
1357 process_txrx_fifo(info);
1359 if (info->port.flags & ASYNC_INITIALIZED) {
1360 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1361 spin_lock_irqsave(&info->slock, sl_flags);
1362 mxser_change_speed(tty, NULL);
1363 spin_unlock_irqrestore(&info->slock, sl_flags);
1366 retval = mxser_startup(tty);
1372 * mxser_get_lsr_info - get line status register info
1374 * Purpose: Let user call ioctl() to get info when the UART physically
1375 * is emptied. On bus types like RS485, the transmitter must
1376 * release the bus after transmitting. This must be done when
1377 * the transmit shift register is empty, not be done when the
1378 * transmit holding register is empty. This functionality
1379 * allows an RS485 driver to be written in user space.
1381 static int mxser_get_lsr_info(struct mxser_port *info,
1382 unsigned int __user *value)
1384 unsigned char status;
1385 unsigned int result;
1386 unsigned long flags;
1388 spin_lock_irqsave(&info->slock, flags);
1389 status = inb(info->ioaddr + UART_LSR);
1390 spin_unlock_irqrestore(&info->slock, flags);
1391 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1392 return put_user(result, value);
1395 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1397 struct mxser_port *info = tty->driver_data;
1398 unsigned char control, status;
1399 unsigned long flags;
1402 if (tty->index == MXSER_PORTS)
1403 return -ENOIOCTLCMD;
1404 if (test_bit(TTY_IO_ERROR, &tty->flags))
1407 control = info->MCR;
1409 spin_lock_irqsave(&info->slock, flags);
1410 status = inb(info->ioaddr + UART_MSR);
1411 if (status & UART_MSR_ANY_DELTA)
1412 mxser_check_modem_status(tty, info, status);
1413 spin_unlock_irqrestore(&info->slock, flags);
1414 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1415 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1416 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1417 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1418 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1419 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1422 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1423 unsigned int set, unsigned int clear)
1425 struct mxser_port *info = tty->driver_data;
1426 unsigned long flags;
1429 if (tty->index == MXSER_PORTS)
1430 return -ENOIOCTLCMD;
1431 if (test_bit(TTY_IO_ERROR, &tty->flags))
1434 spin_lock_irqsave(&info->slock, flags);
1436 if (set & TIOCM_RTS)
1437 info->MCR |= UART_MCR_RTS;
1438 if (set & TIOCM_DTR)
1439 info->MCR |= UART_MCR_DTR;
1441 if (clear & TIOCM_RTS)
1442 info->MCR &= ~UART_MCR_RTS;
1443 if (clear & TIOCM_DTR)
1444 info->MCR &= ~UART_MCR_DTR;
1446 outb(info->MCR, info->ioaddr + UART_MCR);
1447 spin_unlock_irqrestore(&info->slock, flags);
1451 static int __init mxser_program_mode(int port)
1463 id = inb(port + 1) & 0x1F;
1464 if ((id != C168_ASIC_ID) &&
1465 (id != C104_ASIC_ID) &&
1466 (id != C102_ASIC_ID) &&
1467 (id != CI132_ASIC_ID) &&
1468 (id != CI134_ASIC_ID) &&
1469 (id != CI104J_ASIC_ID))
1471 for (i = 0, j = 0; i < 4; i++) {
1475 } else if ((j == 1) && (n == 1)) {
1486 static void __init mxser_normal_mode(int port)
1490 outb(0xA5, port + 1);
1491 outb(0x80, port + 3);
1492 outb(12, port + 0); /* 9600 bps */
1494 outb(0x03, port + 3); /* 8 data bits */
1495 outb(0x13, port + 4); /* loop back mode */
1496 for (i = 0; i < 16; i++) {
1498 if ((n & 0x61) == 0x60)
1503 outb(0x00, port + 4);
1506 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1507 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1508 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1509 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1510 #define EN_CCMD 0x000 /* Chip's command register */
1511 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1512 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1513 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1514 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1515 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1516 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1517 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1518 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1519 static int __init mxser_read_register(int port, unsigned short *regs)
1521 int i, k, value, id;
1524 id = mxser_program_mode(port);
1527 for (i = 0; i < 14; i++) {
1528 k = (i & 0x3F) | 0x180;
1529 for (j = 0x100; j > 0; j >>= 1) {
1530 outb(CHIP_CS, port);
1532 outb(CHIP_CS | CHIP_DO, port);
1533 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1535 outb(CHIP_CS, port);
1536 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1541 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1542 outb(CHIP_CS, port);
1543 outb(CHIP_CS | CHIP_SK, port);
1544 if (inb(port) & CHIP_DI)
1550 mxser_normal_mode(port);
1554 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1556 struct mxser_port *port;
1557 struct tty_struct *tty;
1563 case MOXA_GET_MAJOR:
1564 if (printk_ratelimit())
1565 printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1566 "%x (GET_MAJOR), fix your userspace\n",
1567 current->comm, cmd);
1568 return put_user(ttymajor, (int __user *)argp);
1570 case MOXA_CHKPORTENABLE:
1573 for (i = 0; i < MXSER_BOARDS; i++)
1574 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1575 if (mxser_boards[i].ports[j].ioaddr)
1578 return put_user(result, (unsigned long __user *)argp);
1579 case MOXA_GETDATACOUNT:
1581 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1585 case MOXA_GETMSTATUS: {
1586 struct mxser_mstatus ms, __user *msu = argp;
1588 for (i = 0; i < MXSER_BOARDS; i++)
1589 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1590 port = &mxser_boards[i].ports[j];
1591 memset(&ms, 0, sizeof(ms));
1596 tty = tty_port_tty_get(&port->port);
1598 if (!tty || !tty->termios)
1599 ms.cflag = port->normal_termios.c_cflag;
1601 ms.cflag = tty->termios->c_cflag;
1603 status = inb(port->ioaddr + UART_MSR);
1604 if (status & UART_MSR_DCD)
1606 if (status & UART_MSR_DSR)
1608 if (status & UART_MSR_CTS)
1611 if (copy_to_user(msu, &ms, sizeof(ms))) {
1620 case MOXA_ASPP_MON_EXT: {
1621 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1622 unsigned int cflag, iflag, p;
1625 me = kzalloc(sizeof(*me), GFP_KERNEL);
1630 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1631 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1632 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1636 port = &mxser_boards[i].ports[j];
1640 status = mxser_get_msr(port->ioaddr, 0, p);
1642 if (status & UART_MSR_TERI)
1644 if (status & UART_MSR_DDSR)
1646 if (status & UART_MSR_DDCD)
1648 if (status & UART_MSR_DCTS)
1651 port->mon_data.modem_status = status;
1652 me->rx_cnt[p] = port->mon_data.rxcnt;
1653 me->tx_cnt[p] = port->mon_data.txcnt;
1654 me->up_rxcnt[p] = port->mon_data.up_rxcnt;
1655 me->up_txcnt[p] = port->mon_data.up_txcnt;
1656 me->modem_status[p] =
1657 port->mon_data.modem_status;
1658 tty = tty_port_tty_get(&port->port);
1660 if (!tty || !tty->termios) {
1661 cflag = port->normal_termios.c_cflag;
1662 iflag = port->normal_termios.c_iflag;
1663 me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);
1665 cflag = tty->termios->c_cflag;
1666 iflag = tty->termios->c_iflag;
1667 me->baudrate[p] = tty_get_baud_rate(tty);
1671 me->databits[p] = cflag & CSIZE;
1672 me->stopbits[p] = cflag & CSTOPB;
1673 me->parity[p] = cflag & (PARENB | PARODD |
1676 if (cflag & CRTSCTS)
1677 me->flowctrl[p] |= 0x03;
1679 if (iflag & (IXON | IXOFF))
1680 me->flowctrl[p] |= 0x0C;
1682 if (port->type == PORT_16550A)
1685 opmode = inb(port->opmode_ioaddr) >>
1687 opmode &= OP_MODE_MASK;
1688 me->iftype[p] = opmode;
1692 if (copy_to_user(argp, me, sizeof(*me)))
1698 return -ENOIOCTLCMD;
1703 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1704 struct async_icount *cprev)
1706 struct async_icount cnow;
1707 unsigned long flags;
1710 spin_lock_irqsave(&info->slock, flags);
1711 cnow = info->icount; /* atomic copy */
1712 spin_unlock_irqrestore(&info->slock, flags);
1714 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1715 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1716 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1717 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1724 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1725 unsigned int cmd, unsigned long arg)
1727 struct mxser_port *info = tty->driver_data;
1728 struct async_icount cnow;
1729 unsigned long flags;
1730 void __user *argp = (void __user *)arg;
1733 if (tty->index == MXSER_PORTS)
1734 return mxser_ioctl_special(cmd, argp);
1736 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1738 unsigned long opmode;
1739 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1741 unsigned char val, mask;
1744 if (cmd == MOXA_SET_OP_MODE) {
1745 if (get_user(opmode, (int __user *) argp))
1747 if (opmode != RS232_MODE &&
1748 opmode != RS485_2WIRE_MODE &&
1749 opmode != RS422_MODE &&
1750 opmode != RS485_4WIRE_MODE)
1755 val = inb(info->opmode_ioaddr);
1757 val |= (opmode << shiftbit);
1758 outb(val, info->opmode_ioaddr);
1763 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1764 opmode &= OP_MODE_MASK;
1766 if (put_user(opmode, (int __user *)argp))
1772 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1773 test_bit(TTY_IO_ERROR, &tty->flags))
1779 retval = mxser_get_serial_info(tty, argp);
1784 retval = mxser_set_serial_info(tty, argp);
1787 case TIOCSERGETLSR: /* Get line status register */
1788 return mxser_get_lsr_info(info, argp);
1790 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1791 * - mask passed in arg for lines of interest
1792 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1793 * Caller should use TIOCGICOUNT to see which one it was
1796 spin_lock_irqsave(&info->slock, flags);
1797 cnow = info->icount; /* note the counters on entry */
1798 spin_unlock_irqrestore(&info->slock, flags);
1800 return wait_event_interruptible(info->delta_msr_wait,
1801 mxser_cflags_changed(info, arg, &cnow));
1803 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1804 * Return: write counters to the user passed counter struct
1805 * NB: both 1->0 and 0->1 transitions are counted except for
1806 * RI where only 0->1 is counted.
1809 struct serial_icounter_struct icnt = { 0 };
1810 spin_lock_irqsave(&info->slock, flags);
1811 cnow = info->icount;
1812 spin_unlock_irqrestore(&info->slock, flags);
1814 icnt.frame = cnow.frame;
1815 icnt.brk = cnow.brk;
1816 icnt.overrun = cnow.overrun;
1817 icnt.buf_overrun = cnow.buf_overrun;
1818 icnt.parity = cnow.parity;
1821 icnt.cts = cnow.cts;
1822 icnt.dsr = cnow.dsr;
1823 icnt.rng = cnow.rng;
1824 icnt.dcd = cnow.dcd;
1826 return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
1828 case MOXA_HighSpeedOn:
1829 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1830 case MOXA_SDS_RSTICOUNTER:
1832 info->mon_data.rxcnt = 0;
1833 info->mon_data.txcnt = 0;
1837 case MOXA_ASPP_OQUEUE:{
1841 len = mxser_chars_in_buffer(tty);
1842 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1843 len += (lsr ? 0 : 1);
1846 return put_user(len, (int __user *)argp);
1848 case MOXA_ASPP_MON: {
1852 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1853 mxser_check_modem_status(tty, info, status);
1855 mcr = inb(info->ioaddr + UART_MCR);
1856 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1857 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1859 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1861 if (mcr & MOXA_MUST_MCR_TX_XON)
1862 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1864 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1866 if (tty->hw_stopped)
1867 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1869 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1871 if (copy_to_user(argp, &info->mon_data,
1872 sizeof(struct mxser_mon)))
1877 case MOXA_ASPP_LSTATUS: {
1878 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1881 info->err_shadow = 0;
1884 case MOXA_SET_BAUD_METHOD: {
1887 if (get_user(method, (int __user *)argp))
1889 mxser_set_baud_method[tty->index] = method;
1890 return put_user(method, (int __user *)argp);
1893 return -ENOIOCTLCMD;
1898 static void mxser_stoprx(struct tty_struct *tty)
1900 struct mxser_port *info = tty->driver_data;
1902 info->ldisc_stop_rx = 1;
1904 if (info->board->chip_flag) {
1905 info->IER &= ~MOXA_MUST_RECV_ISR;
1906 outb(info->IER, info->ioaddr + UART_IER);
1908 info->x_char = STOP_CHAR(tty);
1909 outb(0, info->ioaddr + UART_IER);
1910 info->IER |= UART_IER_THRI;
1911 outb(info->IER, info->ioaddr + UART_IER);
1915 if (tty->termios->c_cflag & CRTSCTS) {
1916 info->MCR &= ~UART_MCR_RTS;
1917 outb(info->MCR, info->ioaddr + UART_MCR);
1922 * This routine is called by the upper-layer tty layer to signal that
1923 * incoming characters should be throttled.
1925 static void mxser_throttle(struct tty_struct *tty)
1930 static void mxser_unthrottle(struct tty_struct *tty)
1932 struct mxser_port *info = tty->driver_data;
1935 info->ldisc_stop_rx = 0;
1940 if (info->board->chip_flag) {
1941 info->IER |= MOXA_MUST_RECV_ISR;
1942 outb(info->IER, info->ioaddr + UART_IER);
1944 info->x_char = START_CHAR(tty);
1945 outb(0, info->ioaddr + UART_IER);
1946 info->IER |= UART_IER_THRI;
1947 outb(info->IER, info->ioaddr + UART_IER);
1952 if (tty->termios->c_cflag & CRTSCTS) {
1953 info->MCR |= UART_MCR_RTS;
1954 outb(info->MCR, info->ioaddr + UART_MCR);
1959 * mxser_stop() and mxser_start()
1961 * This routines are called before setting or resetting tty->stopped.
1962 * They enable or disable transmitter interrupts, as necessary.
1964 static void mxser_stop(struct tty_struct *tty)
1966 struct mxser_port *info = tty->driver_data;
1967 unsigned long flags;
1969 spin_lock_irqsave(&info->slock, flags);
1970 if (info->IER & UART_IER_THRI) {
1971 info->IER &= ~UART_IER_THRI;
1972 outb(info->IER, info->ioaddr + UART_IER);
1974 spin_unlock_irqrestore(&info->slock, flags);
1977 static void mxser_start(struct tty_struct *tty)
1979 struct mxser_port *info = tty->driver_data;
1980 unsigned long flags;
1982 spin_lock_irqsave(&info->slock, flags);
1983 if (info->xmit_cnt && info->port.xmit_buf) {
1984 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1985 info->IER |= UART_IER_THRI;
1986 outb(info->IER, info->ioaddr + UART_IER);
1988 spin_unlock_irqrestore(&info->slock, flags);
1991 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1993 struct mxser_port *info = tty->driver_data;
1994 unsigned long flags;
1996 spin_lock_irqsave(&info->slock, flags);
1997 mxser_change_speed(tty, old_termios);
1998 spin_unlock_irqrestore(&info->slock, flags);
2000 if ((old_termios->c_cflag & CRTSCTS) &&
2001 !(tty->termios->c_cflag & CRTSCTS)) {
2002 tty->hw_stopped = 0;
2006 /* Handle sw stopped */
2007 if ((old_termios->c_iflag & IXON) &&
2008 !(tty->termios->c_iflag & IXON)) {
2011 if (info->board->chip_flag) {
2012 spin_lock_irqsave(&info->slock, flags);
2013 mxser_disable_must_rx_software_flow_control(
2015 spin_unlock_irqrestore(&info->slock, flags);
2023 * mxser_wait_until_sent() --- wait until the transmitter is empty
2025 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2027 struct mxser_port *info = tty->driver_data;
2028 unsigned long orig_jiffies, char_time;
2031 if (info->type == PORT_UNKNOWN)
2034 if (info->xmit_fifo_size == 0)
2035 return; /* Just in case.... */
2037 orig_jiffies = jiffies;
2039 * Set the check interval to be 1/5 of the estimated time to
2040 * send a single character, and make it at least 1. The check
2041 * interval should also be less than the timeout.
2043 * Note: we have to use pretty tight timings here to satisfy
2046 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2047 char_time = char_time / 5;
2050 if (timeout && timeout < char_time)
2051 char_time = timeout;
2053 * If the transmitter hasn't cleared in twice the approximate
2054 * amount of time to send the entire FIFO, it probably won't
2055 * ever clear. This assumes the UART isn't doing flow
2056 * control, which is currently the case. Hence, if it ever
2057 * takes longer than info->timeout, this is probably due to a
2058 * UART bug of some kind. So, we clamp the timeout parameter at
2061 if (!timeout || timeout > 2 * info->timeout)
2062 timeout = 2 * info->timeout;
2063 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2064 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2065 timeout, char_time);
2066 printk("jiff=%lu...", jiffies);
2069 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2070 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2071 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2073 schedule_timeout_interruptible(char_time);
2074 if (signal_pending(current))
2076 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2079 set_current_state(TASK_RUNNING);
2082 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2083 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2088 * This routine is called by tty_hangup() when a hangup is signaled.
2090 static void mxser_hangup(struct tty_struct *tty)
2092 struct mxser_port *info = tty->driver_data;
2094 mxser_flush_buffer(tty);
2095 mxser_shutdown(tty);
2096 tty_port_hangup(&info->port);
2100 * mxser_rs_break() --- routine which turns the break handling on or off
2102 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2104 struct mxser_port *info = tty->driver_data;
2105 unsigned long flags;
2107 spin_lock_irqsave(&info->slock, flags);
2108 if (break_state == -1)
2109 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2110 info->ioaddr + UART_LCR);
2112 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2113 info->ioaddr + UART_LCR);
2114 spin_unlock_irqrestore(&info->slock, flags);
2118 static void mxser_receive_chars(struct tty_struct *tty,
2119 struct mxser_port *port, int *status)
2121 unsigned char ch, gdl;
2127 recv_room = tty->receive_room;
2128 if (recv_room == 0 && !port->ldisc_stop_rx)
2130 if (port->board->chip_flag != MOXA_OTHER_UART) {
2132 if (*status & UART_LSR_SPECIAL)
2134 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2135 (*status & MOXA_MUST_LSR_RERR))
2137 if (*status & MOXA_MUST_LSR_RERR)
2140 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2142 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2143 gdl &= MOXA_MUST_GDL_MASK;
2144 if (gdl >= recv_room) {
2145 if (!port->ldisc_stop_rx)
2149 ch = inb(port->ioaddr + UART_RX);
2150 tty_insert_flip_char(tty, ch, 0);
2161 ch = inb(port->ioaddr + UART_RX);
2162 if (port->board->chip_flag && (*status & UART_LSR_OE))
2163 outb(0x23, port->ioaddr + UART_FCR);
2164 *status &= port->read_status_mask;
2165 if (*status & port->ignore_status_mask) {
2166 if (++ignored > 100)
2170 if (*status & UART_LSR_SPECIAL) {
2171 if (*status & UART_LSR_BI) {
2175 if (port->port.flags & ASYNC_SAK)
2177 } else if (*status & UART_LSR_PE) {
2179 port->icount.parity++;
2180 } else if (*status & UART_LSR_FE) {
2182 port->icount.frame++;
2183 } else if (*status & UART_LSR_OE) {
2185 port->icount.overrun++;
2189 tty_insert_flip_char(tty, ch, flag);
2191 if (cnt >= recv_room) {
2192 if (!port->ldisc_stop_rx)
2199 if (port->board->chip_flag)
2202 *status = inb(port->ioaddr + UART_LSR);
2203 } while (*status & UART_LSR_DR);
2206 mxvar_log.rxcnt[tty->index] += cnt;
2207 port->mon_data.rxcnt += cnt;
2208 port->mon_data.up_rxcnt += cnt;
2211 * We are called from an interrupt context with &port->slock
2212 * being held. Drop it temporarily in order to prevent
2213 * recursive locking.
2215 spin_unlock(&port->slock);
2216 tty_flip_buffer_push(tty);
2217 spin_lock(&port->slock);
2220 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2225 outb(port->x_char, port->ioaddr + UART_TX);
2227 mxvar_log.txcnt[tty->index]++;
2228 port->mon_data.txcnt++;
2229 port->mon_data.up_txcnt++;
2234 if (port->port.xmit_buf == NULL)
2237 if (port->xmit_cnt <= 0 || tty->stopped ||
2239 (port->type != PORT_16550A) &&
2240 (!port->board->chip_flag))) {
2241 port->IER &= ~UART_IER_THRI;
2242 outb(port->IER, port->ioaddr + UART_IER);
2246 cnt = port->xmit_cnt;
2247 count = port->xmit_fifo_size;
2249 outb(port->port.xmit_buf[port->xmit_tail++],
2250 port->ioaddr + UART_TX);
2251 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2252 if (--port->xmit_cnt <= 0)
2254 } while (--count > 0);
2255 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2257 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2258 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2259 port->icount.tx += (cnt - port->xmit_cnt);
2261 if (port->xmit_cnt < WAKEUP_CHARS && tty)
2264 if (port->xmit_cnt <= 0) {
2265 port->IER &= ~UART_IER_THRI;
2266 outb(port->IER, port->ioaddr + UART_IER);
2271 * This is the serial driver's generic interrupt routine
2273 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2276 struct mxser_board *brd = NULL;
2277 struct mxser_port *port;
2278 int max, irqbits, bits, msr;
2279 unsigned int int_cnt, pass_counter = 0;
2280 int handled = IRQ_NONE;
2281 struct tty_struct *tty;
2283 for (i = 0; i < MXSER_BOARDS; i++)
2284 if (dev_id == &mxser_boards[i]) {
2289 if (i == MXSER_BOARDS)
2293 max = brd->info->nports;
2294 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2295 irqbits = inb(brd->vector) & brd->vector_mask;
2296 if (irqbits == brd->vector_mask)
2299 handled = IRQ_HANDLED;
2300 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2301 if (irqbits == brd->vector_mask)
2305 port = &brd->ports[i];
2308 spin_lock(&port->slock);
2310 iir = inb(port->ioaddr + UART_IIR);
2311 if (iir & UART_IIR_NO_INT)
2313 iir &= MOXA_MUST_IIR_MASK;
2314 tty = tty_port_tty_get(&port->port);
2316 (port->port.flags & ASYNC_CLOSING) ||
2317 !(port->port.flags &
2318 ASYNC_INITIALIZED)) {
2319 status = inb(port->ioaddr + UART_LSR);
2320 outb(0x27, port->ioaddr + UART_FCR);
2321 inb(port->ioaddr + UART_MSR);
2326 status = inb(port->ioaddr + UART_LSR);
2328 if (status & UART_LSR_PE)
2329 port->err_shadow |= NPPI_NOTIFY_PARITY;
2330 if (status & UART_LSR_FE)
2331 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2332 if (status & UART_LSR_OE)
2334 NPPI_NOTIFY_HW_OVERRUN;
2335 if (status & UART_LSR_BI)
2336 port->err_shadow |= NPPI_NOTIFY_BREAK;
2338 if (port->board->chip_flag) {
2339 if (iir == MOXA_MUST_IIR_GDA ||
2340 iir == MOXA_MUST_IIR_RDA ||
2341 iir == MOXA_MUST_IIR_RTO ||
2342 iir == MOXA_MUST_IIR_LSR)
2343 mxser_receive_chars(tty, port,
2347 status &= port->read_status_mask;
2348 if (status & UART_LSR_DR)
2349 mxser_receive_chars(tty, port,
2352 msr = inb(port->ioaddr + UART_MSR);
2353 if (msr & UART_MSR_ANY_DELTA)
2354 mxser_check_modem_status(tty, port, msr);
2356 if (port->board->chip_flag) {
2357 if (iir == 0x02 && (status &
2359 mxser_transmit_chars(tty, port);
2361 if (status & UART_LSR_THRE)
2362 mxser_transmit_chars(tty, port);
2365 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2366 spin_unlock(&port->slock);
2374 static const struct tty_operations mxser_ops = {
2376 .close = mxser_close,
2377 .write = mxser_write,
2378 .put_char = mxser_put_char,
2379 .flush_chars = mxser_flush_chars,
2380 .write_room = mxser_write_room,
2381 .chars_in_buffer = mxser_chars_in_buffer,
2382 .flush_buffer = mxser_flush_buffer,
2383 .ioctl = mxser_ioctl,
2384 .throttle = mxser_throttle,
2385 .unthrottle = mxser_unthrottle,
2386 .set_termios = mxser_set_termios,
2388 .start = mxser_start,
2389 .hangup = mxser_hangup,
2390 .break_ctl = mxser_rs_break,
2391 .wait_until_sent = mxser_wait_until_sent,
2392 .tiocmget = mxser_tiocmget,
2393 .tiocmset = mxser_tiocmset,
2396 struct tty_port_operations mxser_port_ops = {
2397 .carrier_raised = mxser_carrier_raised,
2398 .raise_dtr_rts = mxser_raise_dtr_rts,
2402 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2405 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2409 free_irq(brd->irq, brd);
2410 if (pdev != NULL) { /* PCI */
2412 pci_release_region(pdev, 2);
2413 pci_release_region(pdev, 3);
2416 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2417 release_region(brd->vector, 1);
2421 static int __devinit mxser_initbrd(struct mxser_board *brd,
2422 struct pci_dev *pdev)
2424 struct mxser_port *info;
2428 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2429 brd->ports[0].max_baud);
2431 for (i = 0; i < brd->info->nports; i++) {
2432 info = &brd->ports[i];
2433 tty_port_init(&info->port);
2434 info->port.ops = &mxser_port_ops;
2437 info->ldisc_stop_rx = 0;
2439 /* Enhance mode enabled here */
2440 if (brd->chip_flag != MOXA_OTHER_UART)
2441 mxser_enable_must_enchance_mode(info->ioaddr);
2443 info->port.flags = ASYNC_SHARE_IRQ;
2444 info->type = brd->uart_type;
2446 process_txrx_fifo(info);
2448 info->custom_divisor = info->baud_base * 16;
2449 info->port.close_delay = 5 * HZ / 10;
2450 info->port.closing_wait = 30 * HZ;
2451 info->normal_termios = mxvar_sdriver->init_termios;
2452 init_waitqueue_head(&info->delta_msr_wait);
2453 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2454 info->err_shadow = 0;
2455 spin_lock_init(&info->slock);
2457 /* before set INT ISR, disable all int */
2458 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2459 info->ioaddr + UART_IER);
2462 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2465 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2466 "conflict with another device.\n",
2467 brd->info->name, brd->irq);
2468 /* We hold resources, we need to release them. */
2469 mxser_release_res(brd, pdev, 0);
2474 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2477 unsigned short regs[16], irq;
2478 unsigned char scratch, scratch2;
2480 brd->chip_flag = MOXA_OTHER_UART;
2482 id = mxser_read_register(cap, regs);
2485 brd->info = &mxser_cards[0];
2488 brd->info = &mxser_cards[1];
2490 case CI104J_ASIC_ID:
2491 brd->info = &mxser_cards[2];
2494 brd->info = &mxser_cards[5];
2497 brd->info = &mxser_cards[6];
2500 brd->info = &mxser_cards[7];
2507 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2508 Flag-hack checks if configuration should be read as 2-port here. */
2509 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2510 irq = regs[9] & 0xF000;
2511 irq = irq | (irq >> 4);
2512 if (irq != (regs[9] & 0xFF00))
2513 goto err_irqconflict;
2514 } else if (brd->info->nports == 4) {
2515 irq = regs[9] & 0xF000;
2516 irq = irq | (irq >> 4);
2517 irq = irq | (irq >> 8);
2519 goto err_irqconflict;
2520 } else if (brd->info->nports == 8) {
2521 irq = regs[9] & 0xF000;
2522 irq = irq | (irq >> 4);
2523 irq = irq | (irq >> 8);
2524 if ((irq != regs[9]) || (irq != regs[10]))
2525 goto err_irqconflict;
2529 printk(KERN_ERR "mxser: interrupt number unset\n");
2532 brd->irq = ((int)(irq & 0xF000) >> 12);
2533 for (i = 0; i < 8; i++)
2534 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2535 if ((regs[12] & 0x80) == 0) {
2536 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2539 brd->vector = (int)regs[11]; /* interrupt vector */
2541 brd->vector_mask = 0x00FF;
2543 brd->vector_mask = 0x000F;
2544 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2545 if (regs[12] & bits) {
2546 brd->ports[i].baud_base = 921600;
2547 brd->ports[i].max_baud = 921600;
2549 brd->ports[i].baud_base = 115200;
2550 brd->ports[i].max_baud = 115200;
2553 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2554 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2555 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2556 outb(scratch2, cap + UART_LCR);
2557 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2558 scratch = inb(cap + UART_IIR);
2561 brd->uart_type = PORT_16550A;
2563 brd->uart_type = PORT_16450;
2564 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2566 printk(KERN_ERR "mxser: can't request ports I/O region: "
2567 "0x%.8lx-0x%.8lx\n",
2568 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2569 8 * brd->info->nports - 1);
2572 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2573 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2574 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2575 "0x%.8lx-0x%.8lx\n",
2576 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2577 8 * brd->info->nports - 1);
2580 return brd->info->nports;
2583 printk(KERN_ERR "mxser: invalid interrupt number\n");
2587 static int __devinit mxser_probe(struct pci_dev *pdev,
2588 const struct pci_device_id *ent)
2591 struct mxser_board *brd;
2593 unsigned long ioaddress;
2594 int retval = -EINVAL;
2596 for (i = 0; i < MXSER_BOARDS; i++)
2597 if (mxser_boards[i].info == NULL)
2600 if (i >= MXSER_BOARDS) {
2601 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2602 "not configured\n", MXSER_BOARDS);
2606 brd = &mxser_boards[i];
2607 brd->idx = i * MXSER_PORTS_PER_BOARD;
2608 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2609 mxser_cards[ent->driver_data].name,
2610 pdev->bus->number, PCI_SLOT(pdev->devfn));
2612 retval = pci_enable_device(pdev);
2614 dev_err(&pdev->dev, "PCI enable failed\n");
2619 ioaddress = pci_resource_start(pdev, 2);
2620 retval = pci_request_region(pdev, 2, "mxser(IO)");
2624 brd->info = &mxser_cards[ent->driver_data];
2625 for (i = 0; i < brd->info->nports; i++)
2626 brd->ports[i].ioaddr = ioaddress + 8 * i;
2629 ioaddress = pci_resource_start(pdev, 3);
2630 retval = pci_request_region(pdev, 3, "mxser(vector)");
2633 brd->vector = ioaddress;
2636 brd->irq = pdev->irq;
2638 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2639 brd->uart_type = PORT_16550A;
2640 brd->vector_mask = 0;
2642 for (i = 0; i < brd->info->nports; i++) {
2643 for (j = 0; j < UART_INFO_NUM; j++) {
2644 if (Gpci_uart_info[j].type == brd->chip_flag) {
2645 brd->ports[i].max_baud =
2646 Gpci_uart_info[j].max_baud;
2648 /* exception....CP-102 */
2649 if (brd->info->flags & MXSER_HIGHBAUD)
2650 brd->ports[i].max_baud = 921600;
2656 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2657 for (i = 0; i < brd->info->nports; i++) {
2659 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2661 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2663 outb(0, ioaddress + 4); /* default set to RS232 mode */
2664 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2667 for (i = 0; i < brd->info->nports; i++) {
2668 brd->vector_mask |= (1 << i);
2669 brd->ports[i].baud_base = 921600;
2672 /* mxser_initbrd will hook ISR. */
2673 retval = mxser_initbrd(brd, pdev);
2677 for (i = 0; i < brd->info->nports; i++)
2678 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2680 pci_set_drvdata(pdev, brd);
2684 pci_release_region(pdev, 2);
2694 static void __devexit mxser_remove(struct pci_dev *pdev)
2696 struct mxser_board *brd = pci_get_drvdata(pdev);
2699 for (i = 0; i < brd->info->nports; i++)
2700 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2702 mxser_release_res(brd, pdev, 1);
2706 static struct pci_driver mxser_driver = {
2708 .id_table = mxser_pcibrds,
2709 .probe = mxser_probe,
2710 .remove = __devexit_p(mxser_remove)
2713 static int __init mxser_module_init(void)
2715 struct mxser_board *brd;
2716 unsigned int b, i, m;
2719 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2723 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2726 /* Initialize the tty_driver structure */
2727 mxvar_sdriver->owner = THIS_MODULE;
2728 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2729 mxvar_sdriver->name = "ttyMI";
2730 mxvar_sdriver->major = ttymajor;
2731 mxvar_sdriver->minor_start = 0;
2732 mxvar_sdriver->num = MXSER_PORTS + 1;
2733 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2734 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2735 mxvar_sdriver->init_termios = tty_std_termios;
2736 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2737 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2738 tty_set_operations(mxvar_sdriver, &mxser_ops);
2740 retval = tty_register_driver(mxvar_sdriver);
2742 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2747 /* Start finding ISA boards here */
2748 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2752 brd = &mxser_boards[m];
2753 retval = mxser_get_ISA_conf(!ioaddr[b], brd);
2759 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2760 brd->info->name, ioaddr[b]);
2762 /* mxser_initbrd will hook ISR. */
2763 if (mxser_initbrd(brd, NULL) < 0) {
2768 brd->idx = m * MXSER_PORTS_PER_BOARD;
2769 for (i = 0; i < brd->info->nports; i++)
2770 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2775 retval = pci_register_driver(&mxser_driver);
2777 printk(KERN_ERR "mxser: can't register pci driver\n");
2781 } /* else: we have some ISA cards under control */
2786 tty_unregister_driver(mxvar_sdriver);
2788 put_tty_driver(mxvar_sdriver);
2792 static void __exit mxser_module_exit(void)
2796 pci_unregister_driver(&mxser_driver);
2798 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2799 if (mxser_boards[i].info != NULL)
2800 for (j = 0; j < mxser_boards[i].info->nports; j++)
2801 tty_unregister_device(mxvar_sdriver,
2802 mxser_boards[i].idx + j);
2803 tty_unregister_driver(mxvar_sdriver);
2804 put_tty_driver(mxvar_sdriver);
2806 for (i = 0; i < MXSER_BOARDS; i++)
2807 if (mxser_boards[i].info != NULL)
2808 mxser_release_res(&mxser_boards[i], NULL, 1);
2811 module_init(mxser_module_init);
2812 module_exit(mxser_module_exit);