2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw).
6 * This code is loosely based on the Linux serial driver, written by
7 * Linus Torvalds, Theodore T'so and others.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
24 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
25 * - Fixed x86_64 cleanness
26 * - Fixed sleep with spinlock held in mxser_send_break
30 #include <linux/module.h>
31 #include <linux/autoconf.h>
32 #include <linux/errno.h>
33 #include <linux/signal.h>
34 #include <linux/sched.h>
35 #include <linux/timer.h>
36 #include <linux/interrupt.h>
37 #include <linux/tty.h>
38 #include <linux/tty_flip.h>
39 #include <linux/serial.h>
40 #include <linux/serial_reg.h>
41 #include <linux/major.h>
42 #include <linux/string.h>
43 #include <linux/fcntl.h>
44 #include <linux/ptrace.h>
45 #include <linux/gfp.h>
46 #include <linux/ioport.h>
48 #include <linux/smp_lock.h>
49 #include <linux/delay.h>
50 #include <linux/pci.h>
52 #include <asm/system.h>
55 #include <asm/bitops.h>
56 #include <asm/uaccess.h>
58 #include "mxser_new.h"
60 #define MXSER_VERSION "2.0"
61 #define MXSERMAJOR 174
62 #define MXSERCUMAJOR 175
64 #define MXSER_EVENT_TXLOW 1
65 #define MXSER_EVENT_HANGUP 2
67 #define MXSER_BOARDS 4 /* Max. boards */
68 #define MXSER_PORTS 32 /* Max. ports */
69 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
70 #define MXSER_ISR_PASS_LIMIT 99999L
72 #define MXSER_ERR_IOADDR -1
73 #define MXSER_ERR_IRQ -2
74 #define MXSER_ERR_IRQ_CONFLIT -3
75 #define MXSER_ERR_VECTOR -4
77 #define SERIAL_TYPE_NORMAL 1
78 #define SERIAL_TYPE_CALLOUT 2
80 #define WAKEUP_CHARS 256
82 #define UART_MCR_AFE 0x20
83 #define UART_LSR_SPECIAL 0x1E
85 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
88 #define C168_ASIC_ID 1
89 #define C104_ASIC_ID 2
90 #define C102_ASIC_ID 0xB
91 #define CI132_ASIC_ID 4
92 #define CI134_ASIC_ID 3
93 #define CI104J_ASIC_ID 5
96 MXSER_BOARD_C168_ISA = 1,
100 MXSER_BOARD_C104_PCI,
101 MXSER_BOARD_C102_ISA,
122 static char *mxser_brdname[] = {
140 "Moxa UC7000 Serial",
149 static int mxser_numports[] = {
176 #define UART_TYPE_NUM 2
178 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
179 MOXA_MUST_MU150_HWID,
183 /* This is only for PCI */
184 #define UART_INFO_NUM 3
185 struct mxpciuart_info {
196 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
197 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
198 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
199 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
203 static struct pci_device_id mxser_pcibrds[] = {
204 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
205 .driver_data = MXSER_BOARD_C168_PCI },
206 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
207 .driver_data = MXSER_BOARD_C104_PCI },
208 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
209 .driver_data = MXSER_BOARD_CP132 },
210 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
211 .driver_data = MXSER_BOARD_CP114 },
212 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
213 .driver_data = MXSER_BOARD_CT114 },
214 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
215 .driver_data = MXSER_BOARD_CP102 },
216 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
217 .driver_data = MXSER_BOARD_CP104U },
218 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
219 .driver_data = MXSER_BOARD_CP168U },
220 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
221 .driver_data = MXSER_BOARD_CP132U },
222 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
223 .driver_data = MXSER_BOARD_CP134U },
224 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
225 .driver_data = MXSER_BOARD_CP104JU },
226 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
227 .driver_data = MXSER_BOARD_RC7000 },
228 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
229 .driver_data = MXSER_BOARD_CP118U },
230 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
231 .driver_data = MXSER_BOARD_CP102UL },
232 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
233 .driver_data = MXSER_BOARD_CP102U },
234 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
235 .driver_data = MXSER_BOARD_CP118EL },
236 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
237 .driver_data = MXSER_BOARD_CP168EL },
238 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
239 .driver_data = MXSER_BOARD_CP104EL },
242 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
244 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
245 static int ttymajor = MXSERMAJOR;
246 static int calloutmajor = MXSERCUMAJOR;
247 static int verbose = 0;
249 /* Variables for insmod */
251 MODULE_AUTHOR("Casper Yang");
252 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
253 module_param_array(ioaddr, int, NULL, 0);
254 module_param(ttymajor, int, 0);
255 module_param(verbose, bool, 0);
256 MODULE_LICENSE("GPL");
260 unsigned long rxcnt[MXSER_PORTS];
261 unsigned long txcnt[MXSER_PORTS];
268 unsigned long up_rxcnt;
269 unsigned long up_txcnt;
271 unsigned char hold_reason;
274 struct mxser_mon_ext {
275 unsigned long rx_cnt[32];
276 unsigned long tx_cnt[32];
277 unsigned long up_rxcnt[32];
278 unsigned long up_txcnt[32];
279 int modem_status[32];
293 struct mxser_board *board;
294 struct tty_struct *tty;
296 unsigned long ioaddr;
297 unsigned long opmode_ioaddr;
301 int rx_trigger; /* Rx fifo trigger level */
303 int baud_base; /* max. speed */
305 int type; /* UART type */
306 int flags; /* defined in tty.h */
307 long session; /* Session of opening process */
308 long pgrp; /* pgrp of opening process */
310 int x_char; /* xon/xoff character */
311 int IER; /* Interrupt Enable Register */
312 int MCR; /* Modem control register */
314 unsigned char stop_rx;
315 unsigned char ldisc_stop_rx;
319 unsigned short closing_wait;
320 unsigned char err_shadow;
323 int count; /* # of fd on device */
324 int blocked_open; /* # of blocked opens */
325 struct async_icount icount; /* kernel counters for 4 input interrupts */
328 int read_status_mask;
329 int ignore_status_mask;
331 unsigned char *xmit_buf;
336 struct termios normal_termios;
337 struct termios callout_termios;
339 struct mxser_mon mon_data;
342 struct work_struct tqueue;
343 wait_queue_head_t open_wait;
344 wait_queue_head_t close_wait;
345 wait_queue_head_t delta_msr_wait;
349 struct pci_dev *pdev; /* temporary (until pci probing) */
354 unsigned long vector;
355 unsigned long vector_mask;
360 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
363 struct mxser_mstatus {
371 static struct mxser_mstatus GMStatus[MXSER_PORTS];
373 static int mxserBoardCAP[MXSER_BOARDS] = {
375 /* 0x180, 0x280, 0x200, 0x320 */
378 static struct mxser_board mxser_boards[MXSER_BOARDS];
379 static struct tty_driver *mxvar_sdriver;
380 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
381 static struct termios *mxvar_termios[MXSER_PORTS + 1];
382 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
383 static struct mxser_log mxvar_log;
384 static int mxvar_diagflag;
385 static unsigned char mxser_msr[MXSER_PORTS + 1];
386 static struct mxser_mon_ext mon_data_ext;
387 static int mxser_set_baud_method[MXSER_PORTS + 1];
388 static spinlock_t gm_lock;
394 static int mxser_init(void);
396 /* static void mxser_poll(unsigned long); */
397 static int mxser_get_ISA_conf(int, struct mxser_board *);
398 static void mxser_do_softint(void *);
399 static int mxser_open(struct tty_struct *, struct file *);
400 static void mxser_close(struct tty_struct *, struct file *);
401 static int mxser_write(struct tty_struct *, const unsigned char *, int);
402 static int mxser_write_room(struct tty_struct *);
403 static void mxser_flush_buffer(struct tty_struct *);
404 static int mxser_chars_in_buffer(struct tty_struct *);
405 static void mxser_flush_chars(struct tty_struct *);
406 static void mxser_put_char(struct tty_struct *, unsigned char);
407 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
408 static int mxser_ioctl_special(unsigned int, void __user *);
409 static void mxser_throttle(struct tty_struct *);
410 static void mxser_unthrottle(struct tty_struct *);
411 static void mxser_set_termios(struct tty_struct *, struct termios *);
412 static void mxser_stop(struct tty_struct *);
413 static void mxser_start(struct tty_struct *);
414 static void mxser_hangup(struct tty_struct *);
415 static void mxser_rs_break(struct tty_struct *, int);
416 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
417 static void mxser_receive_chars(struct mxser_port *, int *);
418 static void mxser_transmit_chars(struct mxser_port *);
419 static void mxser_check_modem_status(struct mxser_port *, int);
420 static int mxser_block_til_ready(struct tty_struct *, struct file *,
421 struct mxser_port *);
422 static int mxser_startup(struct mxser_port *);
423 static void mxser_shutdown(struct mxser_port *);
424 static int mxser_change_speed(struct mxser_port *, struct termios *);
425 static int mxser_get_serial_info(struct mxser_port *,
426 struct serial_struct __user *);
427 static int mxser_set_serial_info(struct mxser_port *,
428 struct serial_struct __user *);
429 static int mxser_get_lsr_info(struct mxser_port *, unsigned int __user *);
430 static void mxser_send_break(struct mxser_port *, int);
431 static int mxser_tiocmget(struct tty_struct *, struct file *);
432 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int,
434 static int mxser_set_baud(struct mxser_port *, long);
435 static void mxser_wait_until_sent(struct tty_struct *, int);
437 static void mxser_startrx(struct tty_struct *);
438 static void mxser_stoprx(struct tty_struct *);
441 static int CheckIsMoxaMust(int io)
446 outb(0, io + UART_LCR);
447 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
448 oldmcr = inb(io + UART_MCR);
449 outb(0, io + UART_MCR);
450 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
451 if ((hwid = inb(io + UART_MCR)) != 0) {
452 outb(oldmcr, io + UART_MCR);
453 return MOXA_OTHER_UART;
456 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
457 for (i = 0; i < UART_TYPE_NUM; i++) {
458 if (hwid == Gmoxa_uart_id[i])
461 return MOXA_OTHER_UART;
464 /* above is modified by Victor Yu. 08-15-2002 */
466 static const struct tty_operations mxser_ops = {
468 .close = mxser_close,
469 .write = mxser_write,
470 .put_char = mxser_put_char,
471 .flush_chars = mxser_flush_chars,
472 .write_room = mxser_write_room,
473 .chars_in_buffer = mxser_chars_in_buffer,
474 .flush_buffer = mxser_flush_buffer,
475 .ioctl = mxser_ioctl,
476 .throttle = mxser_throttle,
477 .unthrottle = mxser_unthrottle,
478 .set_termios = mxser_set_termios,
480 .start = mxser_start,
481 .hangup = mxser_hangup,
482 .break_ctl = mxser_rs_break,
483 .wait_until_sent = mxser_wait_until_sent,
484 .tiocmget = mxser_tiocmget,
485 .tiocmset = mxser_tiocmset,
489 * The MOXA Smartio/Industio serial driver boot-time initialization code!
492 static int __init mxser_module_init(void)
497 printk(KERN_DEBUG "Loading module mxser ...\n");
498 printk(KERN_INFO "This is mxser driver version 1.9.1 and needs TESTING."
499 "If your are willing to test this driver, please report to "
500 "jirislaby@gmail.com. Thanks.\n");
503 printk(KERN_DEBUG "Done.\n");
507 static void __exit mxser_module_exit(void)
512 printk(KERN_DEBUG "Unloading module mxser ...\n");
514 err = tty_unregister_driver(mxvar_sdriver);
516 put_tty_driver(mxvar_sdriver);
518 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
520 for (i = 0; i < MXSER_BOARDS; i++) {
521 struct pci_dev *pdev;
523 if (mxser_boards[i].board_type == -1)
526 pdev = mxser_boards[i].pdev;
527 free_irq(mxser_boards[i].irq, &mxser_boards[i]);
528 if (pdev != NULL) { /* PCI */
529 pci_release_region(pdev, 2);
530 pci_release_region(pdev, 3);
533 release_region(mxser_boards[i].ports[0].ioaddr, 8 * mxser_boards[i].nports);
534 release_region(mxser_boards[i].vector, 1);
539 printk(KERN_DEBUG "Done.\n");
542 static void process_txrx_fifo(struct mxser_port *info)
546 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
547 info->rx_trigger = 1;
548 info->rx_high_water = 1;
549 info->rx_low_water = 1;
550 info->xmit_fifo_size = 1;
552 for (i = 0; i < UART_INFO_NUM; i++)
553 if (info->board->chip_flag == Gpci_uart_info[i].type) {
554 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
555 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
556 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
557 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
562 static int __devinit mxser_initbrd(struct mxser_board *brd)
564 struct mxser_port *info;
569 printk(" max. baud rate = %d bps.\n",
570 brd->ports[0].max_baud);
573 for (i = 0; i < brd->nports; i++) {
574 info = &brd->ports[i];
577 info->ldisc_stop_rx = 0;
579 /* Enhance mode enabled here */
580 if (brd->chip_flag != MOXA_OTHER_UART)
581 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
583 info->flags = ASYNC_SHARE_IRQ;
584 info->type = brd->uart_type;
586 process_txrx_fifo(info);
588 info->custom_divisor = info->baud_base * 16;
589 info->close_delay = 5 * HZ / 10;
590 info->closing_wait = 30 * HZ;
591 INIT_WORK(&info->tqueue, mxser_do_softint, info);
592 info->normal_termios = mxvar_sdriver->init_termios;
593 init_waitqueue_head(&info->open_wait);
594 init_waitqueue_head(&info->close_wait);
595 init_waitqueue_head(&info->delta_msr_wait);
596 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
597 info->err_shadow = 0;
598 spin_lock_init(&info->slock);
600 /* before set INT ISR, disable all int */
601 outb(inb(info->ioaddr + UART_IER) & 0xf0,
602 info->ioaddr + UART_IER);
605 * Allocate the IRQ if necessary
608 retval = request_irq(brd->irq, mxser_interrupt,
609 (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
610 IRQF_DISABLED, "mxser", brd);
612 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
613 "conflict with another device.\n",
614 mxser_brdname[brd->board_type - 1], brd->irq);
620 static int __init mxser_get_PCI_conf(int board_type, struct mxser_board *brd,
621 struct pci_dev *pdev)
624 unsigned long ioaddress;
628 brd->board_type = board_type;
629 brd->nports = mxser_numports[board_type - 1];
630 ioaddress = pci_resource_start(pdev, 2);
631 retval = pci_request_region(pdev, 2, "mxser(IO)");
635 for (i = 0; i < brd->nports; i++)
636 brd->ports[i].ioaddr = ioaddress + 8 * i;
639 ioaddress = pci_resource_start(pdev, 3);
640 retval = pci_request_region(pdev, 3, "mxser(vector)");
643 brd->vector = ioaddress;
646 brd->irq = pdev->irq;
648 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
649 brd->uart_type = PORT_16550A;
650 brd->vector_mask = 0;
652 for (i = 0; i < brd->nports; i++) {
653 for (j = 0; j < UART_INFO_NUM; j++) {
654 if (Gpci_uart_info[j].type == brd->chip_flag) {
655 brd->ports[i].max_baud =
656 Gpci_uart_info[j].max_baud;
658 /* exception....CP-102 */
659 if (board_type == MXSER_BOARD_CP102)
660 brd->ports[i].max_baud = 921600;
666 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
667 for (i = 0; i < brd->nports; i++) {
669 brd->ports[i].opmode_ioaddr = ioaddress + 4;
671 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
673 outb(0, ioaddress + 4); /* default set to RS232 mode */
674 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
677 for (i = 0; i < brd->nports; i++) {
678 brd->vector_mask |= (1 << i);
679 brd->ports[i].baud_base = 921600;
683 pci_release_region(pdev, 2);
688 static int __init mxser_init(void)
690 struct pci_dev *pdev = NULL;
691 struct mxser_board *brd;
695 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
698 spin_lock_init(&gm_lock);
700 for (i = 0; i < MXSER_BOARDS; i++)
701 mxser_boards[i].board_type = -1;
703 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
706 /* Initialize the tty_driver structure */
707 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
708 mxvar_sdriver->name = "ttyM";
709 mxvar_sdriver->major = ttymajor;
710 mxvar_sdriver->minor_start = 0;
711 mxvar_sdriver->num = MXSER_PORTS + 1;
712 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
713 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
714 mxvar_sdriver->init_termios = tty_std_termios;
715 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
716 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
717 tty_set_operations(mxvar_sdriver, &mxser_ops);
718 mxvar_sdriver->ttys = mxvar_tty;
719 mxvar_sdriver->termios = mxvar_termios;
720 mxvar_sdriver->termios_locked = mxvar_termios_locked;
725 /* Start finding ISA boards here */
726 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
729 if (!(cap = mxserBoardCAP[b]))
732 brd = &mxser_boards[m];
733 retval = mxser_get_ISA_conf(cap, brd);
736 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
737 mxser_brdname[brd->board_type - 1], ioaddr[b]);
740 if (retval == MXSER_ERR_IRQ)
741 printk(KERN_ERR "Invalid interrupt number, "
742 "board not configured\n");
743 else if (retval == MXSER_ERR_IRQ_CONFLIT)
744 printk(KERN_ERR "Invalid interrupt number, "
745 "board not configured\n");
746 else if (retval == MXSER_ERR_VECTOR)
747 printk(KERN_ERR "Invalid interrupt vector, "
748 "board not configured\n");
749 else if (retval == MXSER_ERR_IOADDR)
750 printk(KERN_ERR "Invalid I/O address, "
751 "board not configured\n");
758 /* mxser_initbrd will hook ISR. */
759 if (mxser_initbrd(brd) < 0)
765 /* Start finding ISA boards from module arg */
766 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
769 if (!(cap = ioaddr[b]))
772 brd = &mxser_boards[m];
773 retval = mxser_get_ISA_conf(cap, &mxser_boards[m]);
776 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
777 mxser_brdname[brd->board_type - 1], ioaddr[b]);
780 if (retval == MXSER_ERR_IRQ)
781 printk(KERN_ERR "Invalid interrupt number, "
782 "board not configured\n");
783 else if (retval == MXSER_ERR_IRQ_CONFLIT)
784 printk(KERN_ERR "Invalid interrupt number, "
785 "board not configured\n");
786 else if (retval == MXSER_ERR_VECTOR)
787 printk(KERN_ERR "Invalid interrupt vector, "
788 "board not configured\n");
789 else if (retval == MXSER_ERR_IOADDR)
790 printk(KERN_ERR "Invalid I/O address, "
791 "board not configured\n");
797 /* mxser_initbrd will hook ISR. */
798 if (mxser_initbrd(brd) < 0)
804 /* start finding PCI board here */
805 n = ARRAY_SIZE(mxser_pcibrds) - 1;
808 pdev = pci_get_device(mxser_pcibrds[b].vendor,
809 mxser_pcibrds[b].device, pdev);
814 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
815 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
816 pdev->bus->number, PCI_SLOT(pdev->devfn));
817 if (m >= MXSER_BOARDS)
819 "Too many Smartio/Industio family boards find "
820 "(maximum %d), board not configured\n",
823 if (pci_enable_device(pdev)) {
824 printk(KERN_ERR "Moxa SmartI/O PCI enable "
828 brd = &mxser_boards[m];
830 retval = mxser_get_PCI_conf(
831 (int)mxser_pcibrds[b].driver_data,
834 if (retval == MXSER_ERR_IRQ)
836 "Invalid interrupt number, "
837 "board not configured\n");
838 else if (retval == MXSER_ERR_IRQ_CONFLIT)
840 "Invalid interrupt number, "
841 "board not configured\n");
842 else if (retval == MXSER_ERR_VECTOR)
844 "Invalid interrupt vector, "
845 "board not configured\n");
846 else if (retval == MXSER_ERR_IOADDR)
848 "Invalid I/O address, "
849 "board not configured\n");
852 /* mxser_initbrd will hook ISR. */
853 if (mxser_initbrd(brd) < 0)
856 /* Keep an extra reference if we succeeded. It will
857 be returned at unload time */
862 retval = tty_register_driver(mxvar_sdriver);
864 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
866 put_tty_driver(mxvar_sdriver);
868 for (i = 0; i < MXSER_BOARDS; i++) {
869 if (mxser_boards[i].board_type == -1)
872 free_irq(mxser_boards[i].irq, &mxser_boards[i]);
873 /* todo: release io, vector */
882 static void mxser_do_softint(void *private_)
884 struct mxser_port *info = private_;
885 struct tty_struct *tty;
889 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
891 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
895 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
897 unsigned char status = 0;
899 status = inb(baseaddr + UART_MSR);
901 mxser_msr[port] &= 0x0F;
902 mxser_msr[port] |= status;
903 status = mxser_msr[port];
911 * This routine is called whenever a serial port is opened. It
912 * enables interrupts for a serial port, linking in its async structure into
913 * the IRQ chain. It also performs the serial-specific
914 * initialization for the tty structure.
916 static int mxser_open(struct tty_struct *tty, struct file *filp)
918 struct mxser_port *info;
921 /* initialize driver_data in case something fails */
922 tty->driver_data = NULL;
925 if (line == MXSER_PORTS)
927 if (line < 0 || line > MXSER_PORTS)
929 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
933 tty->driver_data = info;
936 * Start up serial port
939 retval = mxser_startup(info);
943 retval = mxser_block_til_ready(tty, filp, info);
947 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
948 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
949 *tty->termios = info->normal_termios;
951 *tty->termios = info->callout_termios;
952 mxser_change_speed(info, NULL);
955 info->session = process_session(current);
956 info->pgrp = process_group(current);
959 status = mxser_get_msr(info->base, 0, info->port);
960 mxser_check_modem_status(info, status);
963 /* unmark here for very high baud rate (ex. 921600 bps) used */
964 tty->low_latency = 1;
969 * This routine is called when the serial port gets closed. First, we
970 * wait for the last remaining data to be sent. Then, we unlink its
971 * async structure from the interrupt chain if necessary, and we free
972 * that IRQ if nothing is left in the chain.
974 static void mxser_close(struct tty_struct *tty, struct file *filp)
976 struct mxser_port *info = tty->driver_data;
978 unsigned long timeout;
980 struct tty_ldisc *ld;
982 if (tty->index == MXSER_PORTS)
987 spin_lock_irqsave(&info->slock, flags);
989 if (tty_hung_up_p(filp)) {
990 spin_unlock_irqrestore(&info->slock, flags);
993 if ((tty->count == 1) && (info->count != 1)) {
995 * Uh, oh. tty->count is 1, which means that the tty
996 * structure will be freed. Info->count should always
997 * be one in these conditions. If it's greater than
998 * one, we've got real problems, since it means the
999 * serial port won't be shutdown.
1001 printk(KERN_ERR "mxser_close: bad serial port count; "
1002 "tty->count is 1, info->count is %d\n", info->count);
1005 if (--info->count < 0) {
1006 printk(KERN_ERR "mxser_close: bad serial port count for "
1007 "ttys%d: %d\n", tty->index, info->count);
1011 spin_unlock_irqrestore(&info->slock, flags);
1014 info->flags |= ASYNC_CLOSING;
1015 spin_unlock_irqrestore(&info->slock, flags);
1017 * Save the termios structure, since this port may have
1018 * separate termios for callout and dialin.
1020 if (info->flags & ASYNC_NORMAL_ACTIVE)
1021 info->normal_termios = *tty->termios;
1023 * Now we wait for the transmit buffer to clear; and we notify
1024 * the line discipline to only process XON/XOFF characters.
1027 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1028 tty_wait_until_sent(tty, info->closing_wait);
1030 * At this point we stop accepting input. To do this, we
1031 * disable the receive line status interrupts, and tell the
1032 * interrupt driver to stop checking the data ready bit in the
1033 * line status register.
1035 info->IER &= ~UART_IER_RLSI;
1036 if (info->board->chip_flag)
1037 info->IER &= ~MOXA_MUST_RECV_ISR;
1039 info->read_status_mask &= ~UART_LSR_DR;
1041 if (info->flags & ASYNC_INITIALIZED) {
1042 outb(info->IER, info->ioaddr + UART_IER);
1044 * Before we drop DTR, make sure the UART transmitter
1045 * has completely drained; this is especially
1046 * important if there is a transmit FIFO!
1048 timeout = jiffies + HZ;
1049 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1050 schedule_timeout_interruptible(5);
1051 if (time_after(jiffies, timeout))
1055 mxser_shutdown(info);
1057 if (tty->driver->flush_buffer)
1058 tty->driver->flush_buffer(tty);
1060 ld = tty_ldisc_ref(tty);
1062 if (ld->flush_buffer)
1063 ld->flush_buffer(tty);
1064 tty_ldisc_deref(ld);
1070 if (info->blocked_open) {
1071 if (info->close_delay)
1072 schedule_timeout_interruptible(info->close_delay);
1073 wake_up_interruptible(&info->open_wait);
1076 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1077 wake_up_interruptible(&info->close_wait);
1081 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1084 struct mxser_port *info = tty->driver_data;
1085 unsigned long flags;
1087 if (!info->xmit_buf)
1091 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1092 SERIAL_XMIT_SIZE - info->xmit_head));
1096 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1097 spin_lock_irqsave(&info->slock, flags);
1098 info->xmit_head = (info->xmit_head + c) &
1099 (SERIAL_XMIT_SIZE - 1);
1100 info->xmit_cnt += c;
1101 spin_unlock_irqrestore(&info->slock, flags);
1108 if (info->xmit_cnt && !tty->stopped
1109 /*&& !(info->IER & UART_IER_THRI)*/) {
1110 if (!tty->hw_stopped ||
1111 (info->type == PORT_16550A) ||
1112 (info->board->chip_flag)) {
1113 spin_lock_irqsave(&info->slock, flags);
1114 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1116 info->IER |= UART_IER_THRI;
1117 outb(info->IER, info->ioaddr + UART_IER);
1118 spin_unlock_irqrestore(&info->slock, flags);
1124 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1126 struct mxser_port *info = tty->driver_data;
1127 unsigned long flags;
1129 if (!info->xmit_buf)
1132 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1135 spin_lock_irqsave(&info->slock, flags);
1136 info->xmit_buf[info->xmit_head++] = ch;
1137 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1139 spin_unlock_irqrestore(&info->slock, flags);
1140 if (!tty->stopped /*&& !(info->IER & UART_IER_THRI)*/) {
1141 if (!tty->hw_stopped ||
1142 (info->type == PORT_16550A) ||
1143 info->board->chip_flag) {
1144 spin_lock_irqsave(&info->slock, flags);
1145 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1146 info->IER |= UART_IER_THRI;
1147 outb(info->IER, info->ioaddr + UART_IER);
1148 spin_unlock_irqrestore(&info->slock, flags);
1154 static void mxser_flush_chars(struct tty_struct *tty)
1156 struct mxser_port *info = tty->driver_data;
1157 unsigned long flags;
1159 if (info->xmit_cnt <= 0 ||
1163 (info->type != PORT_16550A) &&
1164 (!info->board->chip_flag)
1168 spin_lock_irqsave(&info->slock, flags);
1170 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1171 info->IER |= UART_IER_THRI;
1172 outb(info->IER, info->ioaddr + UART_IER);
1174 spin_unlock_irqrestore(&info->slock, flags);
1177 static int mxser_write_room(struct tty_struct *tty)
1179 struct mxser_port *info = tty->driver_data;
1182 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1188 static int mxser_chars_in_buffer(struct tty_struct *tty)
1190 struct mxser_port *info = tty->driver_data;
1191 int len = info->xmit_cnt;
1193 if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE))
1199 static void mxser_flush_buffer(struct tty_struct *tty)
1201 struct mxser_port *info = tty->driver_data;
1203 unsigned long flags;
1206 spin_lock_irqsave(&info->slock, flags);
1207 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1209 /* below added by shinhay */
1210 fcr = inb(info->ioaddr + UART_FCR);
1211 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1212 info->ioaddr + UART_FCR);
1213 outb(fcr, info->ioaddr + UART_FCR);
1215 spin_unlock_irqrestore(&info->slock, flags);
1216 /* above added by shinhay */
1218 wake_up_interruptible(&tty->write_wait);
1219 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1220 (tty->ldisc.write_wakeup) (tty);
1223 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1225 struct mxser_port *info = tty->driver_data;
1227 struct async_icount cprev, cnow; /* kernel counter temps */
1228 struct serial_icounter_struct __user *p_cuser;
1229 unsigned long templ;
1230 unsigned long flags;
1231 void __user *argp = (void __user *)arg;
1233 if (tty->index == MXSER_PORTS)
1234 return mxser_ioctl_special(cmd, argp);
1236 /* following add by Victor Yu. 01-05-2004 */
1237 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1239 unsigned long opmode;
1240 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1242 unsigned char val, mask;
1245 if (cmd == MOXA_SET_OP_MODE) {
1246 if (get_user(opmode, (int __user *) argp))
1248 if (opmode != RS232_MODE &&
1249 opmode != RS485_2WIRE_MODE &&
1250 opmode != RS422_MODE &&
1251 opmode != RS485_4WIRE_MODE)
1255 val = inb(info->opmode_ioaddr);
1257 val |= (opmode << shiftbit);
1258 outb(val, info->opmode_ioaddr);
1261 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1262 opmode &= OP_MODE_MASK;
1263 if (copy_to_user(argp, &opmode, sizeof(int)))
1268 /* above add by Victor Yu. 01-05-2004 */
1270 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1271 if (tty->flags & (1 << TTY_IO_ERROR))
1275 case TCSBRK: /* SVID version: non-zero arg --> no break */
1276 retval = tty_check_change(tty);
1279 tty_wait_until_sent(tty, 0);
1281 mxser_send_break(info, HZ / 4); /* 1/4 second */
1283 case TCSBRKP: /* support for POSIX tcsendbreak() */
1284 retval = tty_check_change(tty);
1287 tty_wait_until_sent(tty, 0);
1288 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1291 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1293 if (get_user(templ, (unsigned long __user *) argp))
1296 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1299 return mxser_get_serial_info(info, argp);
1301 return mxser_set_serial_info(info, argp);
1302 case TIOCSERGETLSR: /* Get line status register */
1303 return mxser_get_lsr_info(info, argp);
1305 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1306 * - mask passed in arg for lines of interest
1307 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1308 * Caller should use TIOCGICOUNT to see which one it was
1311 DECLARE_WAITQUEUE(wait, current);
1313 spin_lock_irqsave(&info->slock, flags);
1314 cprev = info->icount; /* note the counters on entry */
1315 spin_unlock_irqrestore(&info->slock, flags);
1317 add_wait_queue(&info->delta_msr_wait, &wait);
1319 spin_lock_irqsave(&info->slock, flags);
1320 cnow = info->icount; /* atomic copy */
1321 spin_unlock_irqrestore(&info->slock, flags);
1323 set_current_state(TASK_INTERRUPTIBLE);
1324 if (((arg & TIOCM_RNG) &&
1325 (cnow.rng != cprev.rng)) ||
1326 ((arg & TIOCM_DSR) &&
1327 (cnow.dsr != cprev.dsr)) ||
1328 ((arg & TIOCM_CD) &&
1329 (cnow.dcd != cprev.dcd)) ||
1330 ((arg & TIOCM_CTS) &&
1331 (cnow.cts != cprev.cts))) {
1335 /* see if a signal did it */
1336 if (signal_pending(current)) {
1342 current->state = TASK_RUNNING;
1343 remove_wait_queue(&info->delta_msr_wait, &wait);
1348 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1349 * Return: write counters to the user passed counter struct
1350 * NB: both 1->0 and 0->1 transitions are counted except for
1351 * RI where only 0->1 is counted.
1354 spin_lock_irqsave(&info->slock, flags);
1355 cnow = info->icount;
1356 spin_unlock_irqrestore(&info->slock, flags);
1358 /* modified by casper 1/11/2000 */
1359 if (put_user(cnow.frame, &p_cuser->frame))
1361 if (put_user(cnow.brk, &p_cuser->brk))
1363 if (put_user(cnow.overrun, &p_cuser->overrun))
1365 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1367 if (put_user(cnow.parity, &p_cuser->parity))
1369 if (put_user(cnow.rx, &p_cuser->rx))
1371 if (put_user(cnow.tx, &p_cuser->tx))
1373 put_user(cnow.cts, &p_cuser->cts);
1374 put_user(cnow.dsr, &p_cuser->dsr);
1375 put_user(cnow.rng, &p_cuser->rng);
1376 put_user(cnow.dcd, &p_cuser->dcd);
1378 case MOXA_HighSpeedOn:
1379 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1380 case MOXA_SDS_RSTICOUNTER: {
1381 info->mon_data.rxcnt = 0;
1382 info->mon_data.txcnt = 0;
1385 /* (above) added by James. */
1386 case MOXA_ASPP_SETBAUD:{
1388 if (get_user(baud, (long __user *)argp))
1390 mxser_set_baud(info, baud);
1393 case MOXA_ASPP_GETBAUD:
1394 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1399 case MOXA_ASPP_OQUEUE:{
1402 len = mxser_chars_in_buffer(tty);
1404 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1406 len += (lsr ? 0 : 1);
1408 if (copy_to_user(argp, &len, sizeof(int)))
1413 case MOXA_ASPP_MON: {
1416 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1418 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1419 mxser_check_modem_status(info, status);
1421 mcr = inb(info->ioaddr + UART_MCR);
1422 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1423 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1425 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1427 if (mcr & MOXA_MUST_MCR_TX_XON)
1428 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1430 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1432 if (info->tty->hw_stopped)
1433 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1435 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1437 if (copy_to_user(argp, &info->mon_data,
1438 sizeof(struct mxser_mon)))
1444 case MOXA_ASPP_LSTATUS: {
1445 if (copy_to_user(argp, &info->err_shadow,
1446 sizeof(unsigned char)))
1449 info->err_shadow = 0;
1452 case MOXA_SET_BAUD_METHOD: {
1455 if (get_user(method, (int __user *)argp))
1457 mxser_set_baud_method[tty->index] = method;
1458 if (copy_to_user(argp, &method, sizeof(int)))
1464 return -ENOIOCTLCMD;
1470 #define CMSPAR 010000000000
1473 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1475 struct mxser_port *port;
1481 /* if (copy_to_user(argp, mxsercfg,
1482 sizeof(struct mxser_hwconf) * 4))
1486 case MOXA_GET_MAJOR:
1487 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1491 case MOXA_GET_CUMAJOR:
1492 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1496 case MOXA_CHKPORTENABLE:
1499 for (i = 0; i < MXSER_BOARDS; i++)
1500 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1501 if (mxser_boards[i].ports[j].ioaddr)
1504 return put_user(result, (unsigned long __user *)argp);
1505 case MOXA_GETDATACOUNT:
1506 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1509 case MOXA_GETMSTATUS:
1510 for (i = 0; i < MXSER_BOARDS; i++)
1511 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1512 port = &mxser_boards[i].ports[j];
1515 if (!port->ioaddr) {
1516 GMStatus[i].dcd = 0;
1517 GMStatus[i].dsr = 0;
1518 GMStatus[i].cts = 0;
1522 if (!port->tty || !port->tty->termios)
1524 port->normal_termios.c_cflag;
1527 port->tty->termios->c_cflag;
1529 status = inb(port->ioaddr + UART_MSR);
1530 if (status & 0x80 /*UART_MSR_DCD */ )
1531 GMStatus[i].dcd = 1;
1533 GMStatus[i].dcd = 0;
1535 if (status & 0x20 /*UART_MSR_DSR */ )
1536 GMStatus[i].dsr = 1;
1538 GMStatus[i].dsr = 0;
1541 if (status & 0x10 /*UART_MSR_CTS */ )
1542 GMStatus[i].cts = 1;
1544 GMStatus[i].cts = 0;
1546 if (copy_to_user(argp, GMStatus,
1547 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1550 case MOXA_ASPP_MON_EXT: {
1551 int status, p, shiftbit;
1552 unsigned long opmode;
1553 unsigned cflag, iflag;
1555 for (i = 0; i < MXSER_BOARDS; i++)
1556 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1557 port = &mxser_boards[i].ports[j];
1561 status = mxser_get_msr(port->ioaddr, 0, i);
1562 /* mxser_check_modem_status(port, status); */
1564 if (status & UART_MSR_TERI)
1566 if (status & UART_MSR_DDSR)
1568 if (status & UART_MSR_DDCD)
1570 if (status & UART_MSR_DCTS)
1573 port->mon_data.modem_status = status;
1574 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1575 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1576 mon_data_ext.up_rxcnt[i] =
1577 port->mon_data.up_rxcnt;
1578 mon_data_ext.up_txcnt[i] =
1579 port->mon_data.up_txcnt;
1580 mon_data_ext.modem_status[i] =
1581 port->mon_data.modem_status;
1582 mon_data_ext.baudrate[i] = port->realbaud;
1584 if (!port->tty || !port->tty->termios) {
1585 cflag = port->normal_termios.c_cflag;
1586 iflag = port->normal_termios.c_iflag;
1588 cflag = port->tty->termios->c_cflag;
1589 iflag = port->tty->termios->c_iflag;
1592 mon_data_ext.databits[i] = cflag & CSIZE;
1594 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1596 mon_data_ext.parity[i] =
1597 cflag & (PARENB | PARODD | CMSPAR);
1599 mon_data_ext.flowctrl[i] = 0x00;
1601 if (cflag & CRTSCTS)
1602 mon_data_ext.flowctrl[i] |= 0x03;
1604 if (iflag & (IXON | IXOFF))
1605 mon_data_ext.flowctrl[i] |= 0x0C;
1607 if (port->type == PORT_16550A)
1608 mon_data_ext.fifo[i] = 1;
1610 mon_data_ext.fifo[i] = 0;
1614 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1615 opmode &= OP_MODE_MASK;
1617 mon_data_ext.iftype[i] = opmode;
1620 if (copy_to_user(argp, &mon_data_ext,
1621 sizeof(mon_data_ext)))
1627 return -ENOIOCTLCMD;
1632 static void mxser_stoprx(struct tty_struct *tty)
1634 struct mxser_port *info = tty->driver_data;
1636 info->ldisc_stop_rx = 1;
1638 /* following add by Victor Yu. 09-02-2002 */
1639 if (info->board->chip_flag) {
1640 info->IER &= ~MOXA_MUST_RECV_ISR;
1641 outb(info->IER, info->ioaddr + UART_IER);
1642 } else if (!(info->flags & ASYNC_CLOSING)) {
1643 info->x_char = STOP_CHAR(tty);
1644 outb(0, info->ioaddr + UART_IER);
1645 info->IER |= UART_IER_THRI;
1646 outb(info->IER, info->ioaddr + UART_IER);
1650 if (info->tty->termios->c_cflag & CRTSCTS) {
1651 info->MCR &= ~UART_MCR_RTS;
1652 outb(info->MCR, info->ioaddr + UART_MCR);
1656 static void mxser_startrx(struct tty_struct *tty)
1658 struct mxser_port *info = tty->driver_data;
1660 info->ldisc_stop_rx = 0;
1665 /* following add by Victor Yu. 09-02-2002 */
1666 if (info->board->chip_flag) {
1667 info->IER |= MOXA_MUST_RECV_ISR;
1668 outb(info->IER, info->ioaddr + UART_IER);
1669 } else if (!(info->flags & ASYNC_CLOSING)) {
1670 info->x_char = START_CHAR(tty);
1671 outb(0, info->ioaddr + UART_IER);
1672 info->IER |= UART_IER_THRI;
1673 outb(info->IER, info->ioaddr + UART_IER);
1678 if (info->tty->termios->c_cflag & CRTSCTS) {
1679 info->MCR |= UART_MCR_RTS;
1680 outb(info->MCR, info->ioaddr + UART_MCR);
1685 * This routine is called by the upper-layer tty layer to signal that
1686 * incoming characters should be throttled.
1688 static void mxser_throttle(struct tty_struct *tty)
1693 static void mxser_unthrottle(struct tty_struct *tty)
1698 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1700 struct mxser_port *info = tty->driver_data;
1701 unsigned long flags;
1703 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1704 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1706 mxser_change_speed(info, old_termios);
1708 if ((old_termios->c_cflag & CRTSCTS) &&
1709 !(tty->termios->c_cflag & CRTSCTS)) {
1710 tty->hw_stopped = 0;
1715 /* Handle sw stopped */
1716 if ((old_termios->c_iflag & IXON) &&
1717 !(tty->termios->c_iflag & IXON)) {
1720 /* following add by Victor Yu. 09-02-2002 */
1721 if (info->board->chip_flag) {
1722 spin_lock_irqsave(&info->slock, flags);
1723 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1724 spin_unlock_irqrestore(&info->slock, flags);
1726 /* above add by Victor Yu. 09-02-2002 */
1733 * mxser_stop() and mxser_start()
1735 * This routines are called before setting or resetting tty->stopped.
1736 * They enable or disable transmitter interrupts, as necessary.
1738 static void mxser_stop(struct tty_struct *tty)
1740 struct mxser_port *info = tty->driver_data;
1741 unsigned long flags;
1743 spin_lock_irqsave(&info->slock, flags);
1744 if (info->IER & UART_IER_THRI) {
1745 info->IER &= ~UART_IER_THRI;
1746 outb(info->IER, info->ioaddr + UART_IER);
1748 spin_unlock_irqrestore(&info->slock, flags);
1751 static void mxser_start(struct tty_struct *tty)
1753 struct mxser_port *info = tty->driver_data;
1754 unsigned long flags;
1756 spin_lock_irqsave(&info->slock, flags);
1757 if (info->xmit_cnt && info->xmit_buf
1758 /* && !(info->IER & UART_IER_THRI) */) {
1759 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1760 info->IER |= UART_IER_THRI;
1761 outb(info->IER, info->ioaddr + UART_IER);
1763 spin_unlock_irqrestore(&info->slock, flags);
1767 * mxser_wait_until_sent() --- wait until the transmitter is empty
1769 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1771 struct mxser_port *info = tty->driver_data;
1772 unsigned long orig_jiffies, char_time;
1775 if (info->type == PORT_UNKNOWN)
1778 if (info->xmit_fifo_size == 0)
1779 return; /* Just in case.... */
1781 orig_jiffies = jiffies;
1783 * Set the check interval to be 1/5 of the estimated time to
1784 * send a single character, and make it at least 1. The check
1785 * interval should also be less than the timeout.
1787 * Note: we have to use pretty tight timings here to satisfy
1790 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1791 char_time = char_time / 5;
1794 if (timeout && timeout < char_time)
1795 char_time = timeout;
1797 * If the transmitter hasn't cleared in twice the approximate
1798 * amount of time to send the entire FIFO, it probably won't
1799 * ever clear. This assumes the UART isn't doing flow
1800 * control, which is currently the case. Hence, if it ever
1801 * takes longer than info->timeout, this is probably due to a
1802 * UART bug of some kind. So, we clamp the timeout parameter at
1805 if (!timeout || timeout > 2 * info->timeout)
1806 timeout = 2 * info->timeout;
1807 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1808 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1809 timeout, char_time);
1810 printk("jiff=%lu...", jiffies);
1812 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1813 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1814 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1816 schedule_timeout_interruptible(char_time);
1817 if (signal_pending(current))
1819 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1822 set_current_state(TASK_RUNNING);
1824 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1825 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1831 * This routine is called by tty_hangup() when a hangup is signaled.
1833 void mxser_hangup(struct tty_struct *tty)
1835 struct mxser_port *info = tty->driver_data;
1837 mxser_flush_buffer(tty);
1838 mxser_shutdown(info);
1841 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1843 wake_up_interruptible(&info->open_wait);
1847 /* added by James 03-12-2004. */
1849 * mxser_rs_break() --- routine which turns the break handling on or off
1851 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1853 struct mxser_port *info = tty->driver_data;
1854 unsigned long flags;
1856 spin_lock_irqsave(&info->slock, flags);
1857 if (break_state == -1)
1858 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1859 info->ioaddr + UART_LCR);
1861 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1862 info->ioaddr + UART_LCR);
1863 spin_unlock_irqrestore(&info->slock, flags);
1866 /* (above) added by James. */
1870 * This is the serial driver's generic interrupt routine
1872 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1875 struct mxser_board *brd = NULL;
1876 struct mxser_port *port;
1877 int max, irqbits, bits, msr;
1878 int pass_counter = 0;
1879 unsigned int int_cnt;
1880 int handled = IRQ_NONE;
1882 /* spin_lock(&gm_lock); */
1884 for (i = 0; i < MXSER_BOARDS; i++)
1885 if (dev_id == &mxser_boards[i]) {
1890 if (i == MXSER_BOARDS)
1894 max = mxser_numports[brd->board_type - 1];
1896 irqbits = inb(brd->vector) & brd->vector_mask;
1897 if (irqbits == brd->vector_mask)
1900 handled = IRQ_HANDLED;
1901 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1902 if (irqbits == brd->vector_mask)
1906 port = &brd->ports[i];
1910 /* following add by Victor Yu. 09-13-2002 */
1911 iir = inb(port->ioaddr + UART_IIR);
1912 if (iir & UART_IIR_NO_INT)
1914 iir &= MOXA_MUST_IIR_MASK;
1916 status = inb(port->ioaddr + UART_LSR);
1917 outb(0x27, port->ioaddr + UART_FCR);
1918 inb(port->ioaddr + UART_MSR);
1921 /* above add by Victor Yu. 09-13-2002 */
1923 /* following add by Victor Yu. 09-02-2002 */
1924 status = inb(port->ioaddr + UART_LSR);
1926 if (status & UART_LSR_PE)
1927 port->err_shadow |= NPPI_NOTIFY_PARITY;
1928 if (status & UART_LSR_FE)
1929 port->err_shadow |= NPPI_NOTIFY_FRAMING;
1930 if (status & UART_LSR_OE)
1932 NPPI_NOTIFY_HW_OVERRUN;
1933 if (status & UART_LSR_BI)
1934 port->err_shadow |= NPPI_NOTIFY_BREAK;
1936 if (port->board->chip_flag) {
1938 if ( (status & 0x02) && !(status & 0x01) ) {
1939 outb(port->ioaddr+UART_FCR, 0x23);
1943 if (iir == MOXA_MUST_IIR_GDA ||
1944 iir == MOXA_MUST_IIR_RDA ||
1945 iir == MOXA_MUST_IIR_RTO ||
1946 iir == MOXA_MUST_IIR_LSR)
1947 mxser_receive_chars(port,
1951 /* above add by Victor Yu. 09-02-2002 */
1953 status &= port->read_status_mask;
1954 if (status & UART_LSR_DR)
1955 mxser_receive_chars(port,
1958 msr = inb(port->ioaddr + UART_MSR);
1959 if (msr & UART_MSR_ANY_DELTA)
1960 mxser_check_modem_status(port, msr);
1962 /* following add by Victor Yu. 09-13-2002 */
1963 if (port->board->chip_flag) {
1964 if (iir == 0x02 && (status &
1966 mxser_transmit_chars(port);
1968 /* above add by Victor Yu. 09-13-2002 */
1970 if (status & UART_LSR_THRE)
1971 mxser_transmit_chars(port);
1973 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
1975 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
1976 break; /* Prevent infinite loops */
1980 /* spin_unlock(&gm_lock); */
1984 static void mxser_receive_chars(struct mxser_port *port, int *status)
1986 struct tty_struct *tty = port->tty;
1987 unsigned char ch, gdl;
1992 unsigned long flags;
1994 spin_lock_irqsave(&port->slock, flags);
1996 recv_room = tty->receive_room;
1997 if ((recv_room == 0) && (!port->ldisc_stop_rx)) {
1998 /* mxser_throttle(tty); */
2003 /* following add by Victor Yu. 09-02-2002 */
2004 if (port->board->chip_flag != MOXA_OTHER_UART) {
2006 if (*status & UART_LSR_SPECIAL)
2008 /* following add by Victor Yu. 02-11-2004 */
2009 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2010 (*status & MOXA_MUST_LSR_RERR))
2012 /* above add by Victor Yu. 02-14-2004 */
2013 if (*status & MOXA_MUST_LSR_RERR)
2016 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2018 /* add by Victor Yu. 02-11-2004 */
2019 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2020 gdl &= MOXA_MUST_GDL_MASK;
2021 if (gdl >= recv_room) {
2022 if (!port->ldisc_stop_rx) {
2023 /* mxser_throttle(tty); */
2029 ch = inb(port->ioaddr + UART_RX);
2030 tty_insert_flip_char(tty, ch, 0);
2036 /* above add by Victor Yu. 09-02-2002 */
2042 ch = inb(port->ioaddr + UART_RX);
2043 /* following add by Victor Yu. 09-02-2002 */
2044 if (port->board->chip_flag && (*status & UART_LSR_OE)
2045 /*&& !(*status&UART_LSR_DR) */)
2046 outb(0x23, port->ioaddr + UART_FCR);
2047 *status &= port->read_status_mask;
2048 /* above add by Victor Yu. 09-02-2002 */
2049 if (*status & port->ignore_status_mask) {
2050 if (++ignored > 100)
2054 if (*status & UART_LSR_SPECIAL) {
2055 if (*status & UART_LSR_BI) {
2057 /* added by casper 1/11/2000 */
2060 if (port->flags & ASYNC_SAK)
2062 } else if (*status & UART_LSR_PE) {
2064 /* added by casper 1/11/2000 */
2065 port->icount.parity++;
2066 } else if (*status & UART_LSR_FE) {
2068 /* added by casper 1/11/2000 */
2069 port->icount.frame++;
2070 } else if (*status & UART_LSR_OE) {
2072 /* added by casper 1/11/2000 */
2073 port->icount.overrun++;
2078 tty_insert_flip_char(tty, ch, flag);
2080 if (cnt >= recv_room) {
2081 if (!port->ldisc_stop_rx) {
2082 /* mxser_throttle(tty); */
2090 /* following add by Victor Yu. 09-02-2002 */
2091 if (port->board->chip_flag)
2094 /* mask by Victor Yu. 09-02-2002
2095 *status = inb(port->ioaddr + UART_LSR) & port->read_status_mask;
2097 /* following add by Victor Yu. 09-02-2002 */
2098 *status = inb(port->ioaddr + UART_LSR);
2099 /* above add by Victor Yu. 09-02-2002 */
2100 } while (*status & UART_LSR_DR);
2102 end_intr: /* add by Victor Yu. 09-02-2002 */
2103 mxvar_log.rxcnt[port->tty->index] += cnt;
2104 port->mon_data.rxcnt += cnt;
2105 port->mon_data.up_rxcnt += cnt;
2106 spin_unlock_irqrestore(&port->slock, flags);
2108 tty_flip_buffer_push(tty);
2111 static void mxser_transmit_chars(struct mxser_port *port)
2114 unsigned long flags;
2116 spin_lock_irqsave(&port->slock, flags);
2119 outb(port->x_char, port->ioaddr + UART_TX);
2121 mxvar_log.txcnt[port->tty->index]++;
2122 port->mon_data.txcnt++;
2123 port->mon_data.up_txcnt++;
2125 /* added by casper 1/11/2000 */
2130 if (port->xmit_buf == 0)
2133 if (port->xmit_cnt == 0) {
2134 if (port->xmit_cnt < WAKEUP_CHARS) { /* XXX what's this for?? */
2135 set_bit(MXSER_EVENT_TXLOW, &port->event);
2136 schedule_work(&port->tqueue);
2140 if (port->tty->stopped || (port->tty->hw_stopped &&
2141 (port->type != PORT_16550A) &&
2142 (!port->board->chip_flag))) {
2143 port->IER &= ~UART_IER_THRI;
2144 outb(port->IER, port->ioaddr + UART_IER);
2148 cnt = port->xmit_cnt;
2149 count = port->xmit_fifo_size;
2151 outb(port->xmit_buf[port->xmit_tail++],
2152 port->ioaddr + UART_TX);
2153 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2154 if (--port->xmit_cnt <= 0)
2156 } while (--count > 0);
2157 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2159 /* added by James 03-12-2004. */
2160 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2161 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2163 /* added by casper 1/11/2000 */
2164 port->icount.tx += (cnt - port->xmit_cnt);
2166 if (port->xmit_cnt < WAKEUP_CHARS) {
2167 set_bit(MXSER_EVENT_TXLOW, &port->event);
2168 schedule_work(&port->tqueue);
2170 if (port->xmit_cnt <= 0) {
2171 port->IER &= ~UART_IER_THRI;
2172 outb(port->IER, port->ioaddr + UART_IER);
2175 spin_unlock_irqrestore(&port->slock, flags);
2178 static void mxser_check_modem_status(struct mxser_port *port, int status)
2180 /* update input line counters */
2181 if (status & UART_MSR_TERI)
2183 if (status & UART_MSR_DDSR)
2185 if (status & UART_MSR_DDCD)
2187 if (status & UART_MSR_DCTS)
2189 port->mon_data.modem_status = status;
2190 wake_up_interruptible(&port->delta_msr_wait);
2192 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2193 if (status & UART_MSR_DCD)
2194 wake_up_interruptible(&port->open_wait);
2195 schedule_work(&port->tqueue);
2198 if (port->flags & ASYNC_CTS_FLOW) {
2199 if (port->tty->hw_stopped) {
2200 if (status & UART_MSR_CTS) {
2201 port->tty->hw_stopped = 0;
2203 if ((port->type != PORT_16550A) &&
2204 (!port->board->chip_flag)) {
2205 outb(port->IER & ~UART_IER_THRI,
2206 port->ioaddr + UART_IER);
2207 port->IER |= UART_IER_THRI;
2208 outb(port->IER, port->ioaddr +
2211 set_bit(MXSER_EVENT_TXLOW, &port->event);
2212 schedule_work(&port->tqueue);
2215 if (!(status & UART_MSR_CTS)) {
2216 port->tty->hw_stopped = 1;
2217 if (port->type != PORT_16550A &&
2218 !port->board->chip_flag) {
2219 port->IER &= ~UART_IER_THRI;
2220 outb(port->IER, port->ioaddr +
2228 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_port *port)
2230 DECLARE_WAITQUEUE(wait, current);
2233 unsigned long flags;
2236 * If non-blocking mode is set, or the port is not enabled,
2237 * then make the check up front and then exit.
2239 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2240 port->flags |= ASYNC_NORMAL_ACTIVE;
2244 if (tty->termios->c_cflag & CLOCAL)
2248 * Block waiting for the carrier detect and the line to become
2249 * free (i.e., not in use by the callout). While we are in
2250 * this loop, port->count is dropped by one, so that
2251 * mxser_close() knows when to free things. We restore it upon
2252 * exit, either normal or abnormal.
2255 add_wait_queue(&port->open_wait, &wait);
2257 spin_lock_irqsave(&port->slock, flags);
2258 if (!tty_hung_up_p(filp))
2260 spin_unlock_irqrestore(&port->slock, flags);
2261 port->blocked_open++;
2263 spin_lock_irqsave(&port->slock, flags);
2264 outb(inb(port->ioaddr + UART_MCR) |
2265 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
2266 spin_unlock_irqrestore(&port->slock, flags);
2267 set_current_state(TASK_INTERRUPTIBLE);
2268 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
2269 if (port->flags & ASYNC_HUP_NOTIFY)
2272 retval = -ERESTARTSYS;
2275 if (!(port->flags & ASYNC_CLOSING) &&
2277 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
2279 if (signal_pending(current)) {
2280 retval = -ERESTARTSYS;
2285 set_current_state(TASK_RUNNING);
2286 remove_wait_queue(&port->open_wait, &wait);
2287 if (!tty_hung_up_p(filp))
2289 port->blocked_open--;
2292 port->flags |= ASYNC_NORMAL_ACTIVE;
2296 static int mxser_startup(struct mxser_port *info)
2299 unsigned long flags;
2301 page = __get_free_page(GFP_KERNEL);
2305 spin_lock_irqsave(&info->slock, flags);
2307 if (info->flags & ASYNC_INITIALIZED) {
2309 spin_unlock_irqrestore(&info->slock, flags);
2313 if (!info->ioaddr || !info->type) {
2315 set_bit(TTY_IO_ERROR, &info->tty->flags);
2317 spin_unlock_irqrestore(&info->slock, flags);
2323 info->xmit_buf = (unsigned char *) page;
2326 * Clear the FIFO buffers and disable them
2327 * (they will be reenabled in mxser_change_speed())
2329 if (info->board->chip_flag)
2330 outb((UART_FCR_CLEAR_RCVR |
2331 UART_FCR_CLEAR_XMIT |
2332 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
2334 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2335 info->ioaddr + UART_FCR);
2338 * At this point there's no way the LSR could still be 0xFF;
2339 * if it is, then bail out, because there's likely no UART
2342 if (inb(info->ioaddr + UART_LSR) == 0xff) {
2343 spin_unlock_irqrestore(&info->slock, flags);
2344 if (capable(CAP_SYS_ADMIN)) {
2346 set_bit(TTY_IO_ERROR, &info->tty->flags);
2353 * Clear the interrupt registers.
2355 (void) inb(info->ioaddr + UART_LSR);
2356 (void) inb(info->ioaddr + UART_RX);
2357 (void) inb(info->ioaddr + UART_IIR);
2358 (void) inb(info->ioaddr + UART_MSR);
2361 * Now, initialize the UART
2363 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
2364 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2365 outb(info->MCR, info->ioaddr + UART_MCR);
2368 * Finally, enable interrupts
2370 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2371 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2373 /* following add by Victor Yu. 08-30-2002 */
2374 if (info->board->chip_flag)
2375 info->IER |= MOXA_MUST_IER_EGDAI;
2376 /* above add by Victor Yu. 08-30-2002 */
2377 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
2380 * And clear the interrupt registers again for luck.
2382 (void) inb(info->ioaddr + UART_LSR);
2383 (void) inb(info->ioaddr + UART_RX);
2384 (void) inb(info->ioaddr + UART_IIR);
2385 (void) inb(info->ioaddr + UART_MSR);
2388 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2389 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2392 * and set the speed of the serial port
2394 spin_unlock_irqrestore(&info->slock, flags);
2395 mxser_change_speed(info, NULL);
2397 info->flags |= ASYNC_INITIALIZED;
2402 * This routine will shutdown a serial port; interrupts maybe disabled, and
2403 * DTR is dropped if the hangup on close termio flag is on.
2405 static void mxser_shutdown(struct mxser_port *info)
2407 unsigned long flags;
2409 if (!(info->flags & ASYNC_INITIALIZED))
2412 spin_lock_irqsave(&info->slock, flags);
2415 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2416 * here so the queue might never be waken up
2418 wake_up_interruptible(&info->delta_msr_wait);
2421 * Free the IRQ, if necessary
2423 if (info->xmit_buf) {
2424 free_page((unsigned long) info->xmit_buf);
2425 info->xmit_buf = NULL;
2429 outb(0x00, info->ioaddr + UART_IER);
2431 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2432 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2433 outb(info->MCR, info->ioaddr + UART_MCR);
2435 /* clear Rx/Tx FIFO's */
2436 /* following add by Victor Yu. 08-30-2002 */
2437 if (info->board->chip_flag)
2438 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
2439 MOXA_MUST_FCR_GDA_MODE_ENABLE,
2440 info->ioaddr + UART_FCR);
2442 /* above add by Victor Yu. 08-30-2002 */
2443 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
2444 info->ioaddr + UART_FCR);
2446 /* read data port to reset things */
2447 (void) inb(info->ioaddr + UART_RX);
2450 set_bit(TTY_IO_ERROR, &info->tty->flags);
2452 info->flags &= ~ASYNC_INITIALIZED;
2454 /* following add by Victor Yu. 09-23-2002 */
2455 if (info->board->chip_flag)
2456 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2457 /* above add by Victor Yu. 09-23-2002 */
2459 spin_unlock_irqrestore(&info->slock, flags);
2463 * This routine is called to set the UART divisor registers to match
2464 * the specified baud rate for a serial port.
2466 static int mxser_change_speed(struct mxser_port *info,
2467 struct termios *old_termios)
2469 unsigned cflag, cval, fcr;
2471 unsigned char status;
2473 unsigned long flags;
2475 if (!info->tty || !info->tty->termios)
2477 cflag = info->tty->termios->c_cflag;
2478 if (!(info->ioaddr))
2482 #define B921600 (B460800 +1)
2484 if (mxser_set_baud_method[info->tty->index] == 0) {
2485 baud = tty_get_baud_rate(info->tty);
2486 mxser_set_baud(info, baud);
2489 /* byte size and parity */
2490 switch (cflag & CSIZE) {
2505 break; /* too keep GCC shut... */
2510 cval |= UART_LCR_PARITY;
2511 if (!(cflag & PARODD))
2512 cval |= UART_LCR_EPAR;
2514 cval |= UART_LCR_SPAR;
2516 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2517 if (info->board->chip_flag) {
2518 fcr = UART_FCR_ENABLE_FIFO;
2519 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2520 SET_MOXA_MUST_FIFO_VALUE(info);
2524 fcr = UART_FCR_ENABLE_FIFO;
2525 /* following add by Victor Yu. 08-30-2002 */
2526 if (info->board->chip_flag) {
2527 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2528 SET_MOXA_MUST_FIFO_VALUE(info);
2530 /* above add by Victor Yu. 08-30-2002 */
2531 switch (info->rx_trigger) {
2533 fcr |= UART_FCR_TRIGGER_1;
2536 fcr |= UART_FCR_TRIGGER_4;
2539 fcr |= UART_FCR_TRIGGER_8;
2542 fcr |= UART_FCR_TRIGGER_14;
2548 /* CTS flow control flag and modem status interrupts */
2549 info->IER &= ~UART_IER_MSI;
2550 info->MCR &= ~UART_MCR_AFE;
2551 if (cflag & CRTSCTS) {
2552 info->flags |= ASYNC_CTS_FLOW;
2553 info->IER |= UART_IER_MSI;
2554 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
2555 info->MCR |= UART_MCR_AFE;
2556 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2560 status = inb(baseaddr + UART_MSR);
2561 restore_flags(flags);
2563 /* mxser_check_modem_status(info, status); */
2565 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2566 /* MX_LOCK(&info->slock); */
2567 status = inb(info->ioaddr + UART_MSR);
2568 /* MX_UNLOCK(&info->slock); */
2569 if (info->tty->hw_stopped) {
2570 if (status & UART_MSR_CTS) {
2571 info->tty->hw_stopped = 0;
2572 if (info->type != PORT_16550A &&
2573 !info->board->chip_flag) {
2574 outb(info->IER & ~UART_IER_THRI,
2577 info->IER |= UART_IER_THRI;
2578 outb(info->IER, info->ioaddr +
2581 set_bit(MXSER_EVENT_TXLOW, &info->event);
2582 schedule_work(&info->tqueue); }
2584 if (!(status & UART_MSR_CTS)) {
2585 info->tty->hw_stopped = 1;
2586 if ((info->type != PORT_16550A) &&
2587 (!info->board->chip_flag)) {
2588 info->IER &= ~UART_IER_THRI;
2589 outb(info->IER, info->ioaddr +
2596 info->flags &= ~ASYNC_CTS_FLOW;
2598 outb(info->MCR, info->ioaddr + UART_MCR);
2599 if (cflag & CLOCAL) {
2600 info->flags &= ~ASYNC_CHECK_CD;
2602 info->flags |= ASYNC_CHECK_CD;
2603 info->IER |= UART_IER_MSI;
2605 outb(info->IER, info->ioaddr + UART_IER);
2608 * Set up parity check flag
2610 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2611 if (I_INPCK(info->tty))
2612 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2613 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2614 info->read_status_mask |= UART_LSR_BI;
2616 info->ignore_status_mask = 0;
2618 if (I_IGNBRK(info->tty)) {
2619 info->ignore_status_mask |= UART_LSR_BI;
2620 info->read_status_mask |= UART_LSR_BI;
2622 * If we're ignore parity and break indicators, ignore
2623 * overruns too. (For real raw support).
2625 if (I_IGNPAR(info->tty)) {
2626 info->ignore_status_mask |=
2630 info->read_status_mask |=
2636 /* following add by Victor Yu. 09-02-2002 */
2637 if (info->board->chip_flag) {
2638 spin_lock_irqsave(&info->slock, flags);
2639 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
2640 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
2641 if (I_IXON(info->tty)) {
2642 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2644 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2646 if (I_IXOFF(info->tty)) {
2647 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2649 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2652 if ( I_IXANY(info->tty) ) {
2653 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2654 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2656 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2657 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2660 spin_unlock_irqrestore(&info->slock, flags);
2662 /* above add by Victor Yu. 09-02-2002 */
2665 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
2666 outb(cval, info->ioaddr + UART_LCR);
2672 static int mxser_set_baud(struct mxser_port *info, long newspd)
2677 unsigned long flags;
2679 if (!info->tty || !info->tty->termios)
2682 if (!(info->ioaddr))
2685 if (newspd > info->max_baud)
2688 info->realbaud = newspd;
2689 if (newspd == 134) {
2690 quot = (2 * info->baud_base / 269);
2691 } else if (newspd) {
2692 quot = info->baud_base / newspd;
2699 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2700 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2703 spin_lock_irqsave(&info->slock, flags);
2704 info->MCR |= UART_MCR_DTR;
2705 outb(info->MCR, info->ioaddr + UART_MCR);
2706 spin_unlock_irqrestore(&info->slock, flags);
2708 spin_lock_irqsave(&info->slock, flags);
2709 info->MCR &= ~UART_MCR_DTR;
2710 outb(info->MCR, info->ioaddr + UART_MCR);
2711 spin_unlock_irqrestore(&info->slock, flags);
2715 cval = inb(info->ioaddr + UART_LCR);
2717 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
2719 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
2720 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
2721 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
2728 * ------------------------------------------------------------
2729 * friends of mxser_ioctl()
2730 * ------------------------------------------------------------
2732 static int mxser_get_serial_info(struct mxser_port *info,
2733 struct serial_struct __user *retinfo)
2735 struct serial_struct tmp;
2739 memset(&tmp, 0, sizeof(tmp));
2740 tmp.type = info->type;
2741 tmp.line = info->tty->index;
2742 tmp.port = info->ioaddr;
2743 tmp.irq = info->board->irq;
2744 tmp.flags = info->flags;
2745 tmp.baud_base = info->baud_base;
2746 tmp.close_delay = info->close_delay;
2747 tmp.closing_wait = info->closing_wait;
2748 tmp.custom_divisor = info->custom_divisor;
2750 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2755 static int mxser_set_serial_info(struct mxser_port *info,
2756 struct serial_struct __user *new_info)
2758 struct serial_struct new_serial;
2762 if (!new_info || !info->ioaddr)
2764 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2767 if ((new_serial.irq != info->board->irq) ||
2768 (new_serial.port != info->ioaddr) ||
2769 (new_serial.custom_divisor != info->custom_divisor) ||
2770 (new_serial.baud_base != info->baud_base))
2773 flags = info->flags & ASYNC_SPD_MASK;
2775 if (!capable(CAP_SYS_ADMIN)) {
2776 if ((new_serial.baud_base != info->baud_base) ||
2777 (new_serial.close_delay != info->close_delay) ||
2778 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2780 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2781 (new_serial.flags & ASYNC_USR_MASK));
2784 * OK, past this point, all the error checking has been done.
2785 * At this point, we start making changes.....
2787 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2788 (new_serial.flags & ASYNC_FLAGS));
2789 info->close_delay = new_serial.close_delay * HZ / 100;
2790 info->closing_wait = new_serial.closing_wait * HZ / 100;
2791 info->tty->low_latency =
2792 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2793 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2796 /* added by casper, 3/17/2000, for mouse */
2797 info->type = new_serial.type;
2799 process_txrx_fifo(info);
2801 if (info->flags & ASYNC_INITIALIZED) {
2802 if (flags != (info->flags & ASYNC_SPD_MASK))
2803 mxser_change_speed(info, NULL);
2805 retval = mxser_startup(info);
2811 * mxser_get_lsr_info - get line status register info
2813 * Purpose: Let user call ioctl() to get info when the UART physically
2814 * is emptied. On bus types like RS485, the transmitter must
2815 * release the bus after transmitting. This must be done when
2816 * the transmit shift register is empty, not be done when the
2817 * transmit holding register is empty. This functionality
2818 * allows an RS485 driver to be written in user space.
2820 static int mxser_get_lsr_info(struct mxser_port *info,
2821 unsigned int __user *value)
2823 unsigned char status;
2824 unsigned int result;
2825 unsigned long flags;
2827 spin_lock_irqsave(&info->slock, flags);
2828 status = inb(info->ioaddr + UART_LSR);
2829 spin_unlock_irqrestore(&info->slock, flags);
2830 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2831 return put_user(result, value);
2835 * This routine sends a break character out the serial port.
2837 static void mxser_send_break(struct mxser_port *info, int duration)
2839 unsigned long flags;
2843 set_current_state(TASK_INTERRUPTIBLE);
2844 spin_lock_irqsave(&info->slock, flags);
2845 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2846 info->ioaddr + UART_LCR);
2847 spin_unlock_irqrestore(&info->slock, flags);
2848 schedule_timeout(duration);
2849 spin_lock_irqsave(&info->slock, flags);
2850 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2851 info->ioaddr + UART_LCR);
2852 spin_unlock_irqrestore(&info->slock, flags);
2855 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2857 struct mxser_port *info = tty->driver_data;
2858 unsigned char control, status;
2859 unsigned long flags;
2862 if (tty->index == MXSER_PORTS)
2863 return -ENOIOCTLCMD;
2864 if (tty->flags & (1 << TTY_IO_ERROR))
2867 control = info->MCR;
2869 spin_lock_irqsave(&info->slock, flags);
2870 status = inb(info->ioaddr + UART_MSR);
2871 if (status & UART_MSR_ANY_DELTA)
2872 mxser_check_modem_status(info, status);
2873 spin_unlock_irqrestore(&info->slock, flags);
2874 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2875 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2876 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2877 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2878 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2879 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2882 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
2883 unsigned int set, unsigned int clear)
2885 struct mxser_port *info = tty->driver_data;
2886 unsigned long flags;
2889 if (tty->index == MXSER_PORTS)
2890 return -ENOIOCTLCMD;
2891 if (tty->flags & (1 << TTY_IO_ERROR))
2894 spin_lock_irqsave(&info->slock, flags);
2896 if (set & TIOCM_RTS)
2897 info->MCR |= UART_MCR_RTS;
2898 if (set & TIOCM_DTR)
2899 info->MCR |= UART_MCR_DTR;
2901 if (clear & TIOCM_RTS)
2902 info->MCR &= ~UART_MCR_RTS;
2903 if (clear & TIOCM_DTR)
2904 info->MCR &= ~UART_MCR_DTR;
2906 outb(info->MCR, info->ioaddr + UART_MCR);
2907 spin_unlock_irqrestore(&info->slock, flags);
2912 static int mxser_read_register(int, unsigned short *);
2913 static int mxser_program_mode(int);
2914 static void mxser_normal_mode(int);
2916 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2919 unsigned short regs[16], irq;
2920 unsigned char scratch, scratch2;
2922 brd->chip_flag = MOXA_OTHER_UART;
2924 id = mxser_read_register(cap, regs);
2925 if (id == C168_ASIC_ID) {
2926 brd->board_type = MXSER_BOARD_C168_ISA;
2928 } else if (id == C104_ASIC_ID) {
2929 brd->board_type = MXSER_BOARD_C104_ISA;
2931 } else if (id == C102_ASIC_ID) {
2932 brd->board_type = MXSER_BOARD_C102_ISA;
2934 } else if (id == CI132_ASIC_ID) {
2935 brd->board_type = MXSER_BOARD_CI132;
2937 } else if (id == CI134_ASIC_ID) {
2938 brd->board_type = MXSER_BOARD_CI134;
2940 } else if (id == CI104J_ASIC_ID) {
2941 brd->board_type = MXSER_BOARD_CI104J;
2947 if (brd->nports == 2) {
2948 irq = regs[9] & 0xF000;
2949 irq = irq | (irq >> 4);
2950 if (irq != (regs[9] & 0xFF00))
2951 return MXSER_ERR_IRQ_CONFLIT;
2952 } else if (brd->nports == 4) {
2953 irq = regs[9] & 0xF000;
2954 irq = irq | (irq >> 4);
2955 irq = irq | (irq >> 8);
2957 return MXSER_ERR_IRQ_CONFLIT;
2958 } else if (brd->nports == 8) {
2959 irq = regs[9] & 0xF000;
2960 irq = irq | (irq >> 4);
2961 irq = irq | (irq >> 8);
2962 if ((irq != regs[9]) || (irq != regs[10]))
2963 return MXSER_ERR_IRQ_CONFLIT;
2967 return MXSER_ERR_IRQ;
2968 brd->irq = ((int)(irq & 0xF000) >> 12);
2969 for (i = 0; i < 8; i++)
2970 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2971 if ((regs[12] & 0x80) == 0)
2972 return MXSER_ERR_VECTOR;
2973 brd->vector = (int)regs[11]; /* interrupt vector */
2975 brd->vector_mask = 0x00FF;
2977 brd->vector_mask = 0x000F;
2978 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2979 if (regs[12] & bits) {
2980 brd->ports[i].baud_base = 921600;
2981 brd->ports[i].max_baud = 921600; /* add by Victor Yu. 09-04-2002 */
2983 brd->ports[i].baud_base = 115200;
2984 brd->ports[i].max_baud = 115200; /* add by Victor Yu. 09-04-2002 */
2987 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2988 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2989 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2990 outb(scratch2, cap + UART_LCR);
2991 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2992 scratch = inb(cap + UART_IIR);
2995 brd->uart_type = PORT_16550A;
2997 brd->uart_type = PORT_16450;
3002 if (!request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)"))
3003 return MXSER_ERR_IOADDR;
3004 if (!request_region(brd->vector, 1, "mxser(vector)")) {
3005 release_region(brd->ports[0].ioaddr, 8 * brd->nports);
3006 return MXSER_ERR_VECTOR;
3011 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3012 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3013 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3014 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3015 #define EN_CCMD 0x000 /* Chip's command register */
3016 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3017 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3018 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3019 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3020 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3021 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3022 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3023 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3024 static int mxser_read_register(int port, unsigned short *regs)
3026 int i, k, value, id;
3029 id = mxser_program_mode(port);
3032 for (i = 0; i < 14; i++) {
3033 k = (i & 0x3F) | 0x180;
3034 for (j = 0x100; j > 0; j >>= 1) {
3035 outb(CHIP_CS, port);
3037 outb(CHIP_CS | CHIP_DO, port);
3038 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3040 outb(CHIP_CS, port);
3041 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3046 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3047 outb(CHIP_CS, port);
3048 outb(CHIP_CS | CHIP_SK, port);
3049 if (inb(port) & CHIP_DI)
3055 mxser_normal_mode(port);
3059 static int mxser_program_mode(int port)
3062 /* unsigned long flags; */
3064 spin_lock(&gm_lock);
3072 /* restore_flags(flags); */
3073 spin_unlock(&gm_lock);
3075 id = inb(port + 1) & 0x1F;
3076 if ((id != C168_ASIC_ID) &&
3077 (id != C104_ASIC_ID) &&
3078 (id != C102_ASIC_ID) &&
3079 (id != CI132_ASIC_ID) &&
3080 (id != CI134_ASIC_ID) &&
3081 (id != CI104J_ASIC_ID))
3083 for (i = 0, j = 0; i < 4; i++) {
3087 } else if ((j == 1) && (n == 1)) {
3098 static void mxser_normal_mode(int port)
3102 outb(0xA5, port + 1);
3103 outb(0x80, port + 3);
3104 outb(12, port + 0); /* 9600 bps */
3106 outb(0x03, port + 3); /* 8 data bits */
3107 outb(0x13, port + 4); /* loop back mode */
3108 for (i = 0; i < 16; i++) {
3110 if ((n & 0x61) == 0x60)
3115 outb(0x00, port + 4);
3118 module_init(mxser_module_init);
3119 module_exit(mxser_module_exit);