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 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
708 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
709 mxvar_sdriver->name = "ttyM";
710 mxvar_sdriver->major = ttymajor;
711 mxvar_sdriver->minor_start = 0;
712 mxvar_sdriver->num = MXSER_PORTS + 1;
713 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
714 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
715 mxvar_sdriver->init_termios = tty_std_termios;
716 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
717 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
718 tty_set_operations(mxvar_sdriver, &mxser_ops);
719 mxvar_sdriver->ttys = mxvar_tty;
720 mxvar_sdriver->termios = mxvar_termios;
721 mxvar_sdriver->termios_locked = mxvar_termios_locked;
724 memset(mxser_boards, 0, sizeof(mxser_boards));
725 memset(&mxvar_log, 0, sizeof(struct mxser_log));
727 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
728 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
729 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
732 /* Start finding ISA boards here */
733 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
736 if (!(cap = mxserBoardCAP[b]))
739 brd = &mxser_boards[m];
740 retval = mxser_get_ISA_conf(cap, brd);
743 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
744 mxser_brdname[brd->board_type - 1], ioaddr[b]);
747 if (retval == MXSER_ERR_IRQ)
748 printk(KERN_ERR "Invalid interrupt number, "
749 "board not configured\n");
750 else if (retval == MXSER_ERR_IRQ_CONFLIT)
751 printk(KERN_ERR "Invalid interrupt number, "
752 "board not configured\n");
753 else if (retval == MXSER_ERR_VECTOR)
754 printk(KERN_ERR "Invalid interrupt vector, "
755 "board not configured\n");
756 else if (retval == MXSER_ERR_IOADDR)
757 printk(KERN_ERR "Invalid I/O address, "
758 "board not configured\n");
765 /* mxser_initbrd will hook ISR. */
766 if (mxser_initbrd(brd) < 0)
772 /* Start finding ISA boards from module arg */
773 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
776 if (!(cap = ioaddr[b]))
779 brd = &mxser_boards[m];
780 retval = mxser_get_ISA_conf(cap, &mxser_boards[m]);
783 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
784 mxser_brdname[brd->board_type - 1], ioaddr[b]);
787 if (retval == MXSER_ERR_IRQ)
788 printk(KERN_ERR "Invalid interrupt number, "
789 "board not configured\n");
790 else if (retval == MXSER_ERR_IRQ_CONFLIT)
791 printk(KERN_ERR "Invalid interrupt number, "
792 "board not configured\n");
793 else if (retval == MXSER_ERR_VECTOR)
794 printk(KERN_ERR "Invalid interrupt vector, "
795 "board not configured\n");
796 else if (retval == MXSER_ERR_IOADDR)
797 printk(KERN_ERR "Invalid I/O address, "
798 "board not configured\n");
804 /* mxser_initbrd will hook ISR. */
805 if (mxser_initbrd(brd) < 0)
811 /* start finding PCI board here */
812 n = ARRAY_SIZE(mxser_pcibrds) - 1;
815 pdev = pci_get_device(mxser_pcibrds[b].vendor,
816 mxser_pcibrds[b].device, pdev);
821 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
822 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
823 pdev->bus->number, PCI_SLOT(pdev->devfn));
824 if (m >= MXSER_BOARDS)
826 "Too many Smartio/Industio family boards find "
827 "(maximum %d), board not configured\n",
830 if (pci_enable_device(pdev)) {
831 printk(KERN_ERR "Moxa SmartI/O PCI enable "
835 brd = &mxser_boards[m];
837 retval = mxser_get_PCI_conf(
838 (int)mxser_pcibrds[b].driver_data,
841 if (retval == MXSER_ERR_IRQ)
843 "Invalid interrupt number, "
844 "board not configured\n");
845 else if (retval == MXSER_ERR_IRQ_CONFLIT)
847 "Invalid interrupt number, "
848 "board not configured\n");
849 else if (retval == MXSER_ERR_VECTOR)
851 "Invalid interrupt vector, "
852 "board not configured\n");
853 else if (retval == MXSER_ERR_IOADDR)
855 "Invalid I/O address, "
856 "board not configured\n");
859 /* mxser_initbrd will hook ISR. */
860 if (mxser_initbrd(brd) < 0)
863 /* Keep an extra reference if we succeeded. It will
864 be returned at unload time */
869 retval = tty_register_driver(mxvar_sdriver);
871 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
873 put_tty_driver(mxvar_sdriver);
875 for (i = 0; i < MXSER_BOARDS; i++) {
876 if (mxser_boards[i].board_type == -1)
879 free_irq(mxser_boards[i].irq, &mxser_boards[i]);
880 /* todo: release io, vector */
889 static void mxser_do_softint(void *private_)
891 struct mxser_port *info = private_;
892 struct tty_struct *tty;
896 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
898 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
902 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
904 unsigned char status = 0;
906 status = inb(baseaddr + UART_MSR);
908 mxser_msr[port] &= 0x0F;
909 mxser_msr[port] |= status;
910 status = mxser_msr[port];
918 * This routine is called whenever a serial port is opened. It
919 * enables interrupts for a serial port, linking in its async structure into
920 * the IRQ chain. It also performs the serial-specific
921 * initialization for the tty structure.
923 static int mxser_open(struct tty_struct *tty, struct file *filp)
925 struct mxser_port *info;
928 /* initialize driver_data in case something fails */
929 tty->driver_data = NULL;
932 if (line == MXSER_PORTS)
934 if (line < 0 || line > MXSER_PORTS)
936 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
940 tty->driver_data = info;
943 * Start up serial port
946 retval = mxser_startup(info);
950 retval = mxser_block_til_ready(tty, filp, info);
954 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
955 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
956 *tty->termios = info->normal_termios;
958 *tty->termios = info->callout_termios;
959 mxser_change_speed(info, NULL);
962 info->session = process_session(current);
963 info->pgrp = process_group(current);
966 status = mxser_get_msr(info->base, 0, info->port);
967 mxser_check_modem_status(info, status);
970 /* unmark here for very high baud rate (ex. 921600 bps) used */
971 tty->low_latency = 1;
976 * This routine is called when the serial port gets closed. First, we
977 * wait for the last remaining data to be sent. Then, we unlink its
978 * async structure from the interrupt chain if necessary, and we free
979 * that IRQ if nothing is left in the chain.
981 static void mxser_close(struct tty_struct *tty, struct file *filp)
983 struct mxser_port *info = tty->driver_data;
985 unsigned long timeout;
987 struct tty_ldisc *ld;
989 if (tty->index == MXSER_PORTS)
994 spin_lock_irqsave(&info->slock, flags);
996 if (tty_hung_up_p(filp)) {
997 spin_unlock_irqrestore(&info->slock, flags);
1000 if ((tty->count == 1) && (info->count != 1)) {
1002 * Uh, oh. tty->count is 1, which means that the tty
1003 * structure will be freed. Info->count should always
1004 * be one in these conditions. If it's greater than
1005 * one, we've got real problems, since it means the
1006 * serial port won't be shutdown.
1008 printk(KERN_ERR "mxser_close: bad serial port count; "
1009 "tty->count is 1, info->count is %d\n", info->count);
1012 if (--info->count < 0) {
1013 printk(KERN_ERR "mxser_close: bad serial port count for "
1014 "ttys%d: %d\n", tty->index, info->count);
1018 spin_unlock_irqrestore(&info->slock, flags);
1021 info->flags |= ASYNC_CLOSING;
1022 spin_unlock_irqrestore(&info->slock, flags);
1024 * Save the termios structure, since this port may have
1025 * separate termios for callout and dialin.
1027 if (info->flags & ASYNC_NORMAL_ACTIVE)
1028 info->normal_termios = *tty->termios;
1030 * Now we wait for the transmit buffer to clear; and we notify
1031 * the line discipline to only process XON/XOFF characters.
1034 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1035 tty_wait_until_sent(tty, info->closing_wait);
1037 * At this point we stop accepting input. To do this, we
1038 * disable the receive line status interrupts, and tell the
1039 * interrupt driver to stop checking the data ready bit in the
1040 * line status register.
1042 info->IER &= ~UART_IER_RLSI;
1043 if (info->board->chip_flag)
1044 info->IER &= ~MOXA_MUST_RECV_ISR;
1046 info->read_status_mask &= ~UART_LSR_DR;
1048 if (info->flags & ASYNC_INITIALIZED) {
1049 outb(info->IER, info->ioaddr + UART_IER);
1051 * Before we drop DTR, make sure the UART transmitter
1052 * has completely drained; this is especially
1053 * important if there is a transmit FIFO!
1055 timeout = jiffies + HZ;
1056 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1057 schedule_timeout_interruptible(5);
1058 if (time_after(jiffies, timeout))
1062 mxser_shutdown(info);
1064 if (tty->driver->flush_buffer)
1065 tty->driver->flush_buffer(tty);
1067 ld = tty_ldisc_ref(tty);
1069 if (ld->flush_buffer)
1070 ld->flush_buffer(tty);
1071 tty_ldisc_deref(ld);
1077 if (info->blocked_open) {
1078 if (info->close_delay)
1079 schedule_timeout_interruptible(info->close_delay);
1080 wake_up_interruptible(&info->open_wait);
1083 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1084 wake_up_interruptible(&info->close_wait);
1088 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1091 struct mxser_port *info = tty->driver_data;
1092 unsigned long flags;
1094 if (!info->xmit_buf)
1098 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1099 SERIAL_XMIT_SIZE - info->xmit_head));
1103 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1104 spin_lock_irqsave(&info->slock, flags);
1105 info->xmit_head = (info->xmit_head + c) &
1106 (SERIAL_XMIT_SIZE - 1);
1107 info->xmit_cnt += c;
1108 spin_unlock_irqrestore(&info->slock, flags);
1115 if (info->xmit_cnt && !tty->stopped
1116 /*&& !(info->IER & UART_IER_THRI)*/) {
1117 if (!tty->hw_stopped ||
1118 (info->type == PORT_16550A) ||
1119 (info->board->chip_flag)) {
1120 spin_lock_irqsave(&info->slock, flags);
1121 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1123 info->IER |= UART_IER_THRI;
1124 outb(info->IER, info->ioaddr + UART_IER);
1125 spin_unlock_irqrestore(&info->slock, flags);
1131 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1133 struct mxser_port *info = tty->driver_data;
1134 unsigned long flags;
1136 if (!info->xmit_buf)
1139 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1142 spin_lock_irqsave(&info->slock, flags);
1143 info->xmit_buf[info->xmit_head++] = ch;
1144 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1146 spin_unlock_irqrestore(&info->slock, flags);
1147 if (!tty->stopped /*&& !(info->IER & UART_IER_THRI)*/) {
1148 if (!tty->hw_stopped ||
1149 (info->type == PORT_16550A) ||
1150 info->board->chip_flag) {
1151 spin_lock_irqsave(&info->slock, flags);
1152 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1153 info->IER |= UART_IER_THRI;
1154 outb(info->IER, info->ioaddr + UART_IER);
1155 spin_unlock_irqrestore(&info->slock, flags);
1161 static void mxser_flush_chars(struct tty_struct *tty)
1163 struct mxser_port *info = tty->driver_data;
1164 unsigned long flags;
1166 if (info->xmit_cnt <= 0 ||
1170 (info->type != PORT_16550A) &&
1171 (!info->board->chip_flag)
1175 spin_lock_irqsave(&info->slock, flags);
1177 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1178 info->IER |= UART_IER_THRI;
1179 outb(info->IER, info->ioaddr + UART_IER);
1181 spin_unlock_irqrestore(&info->slock, flags);
1184 static int mxser_write_room(struct tty_struct *tty)
1186 struct mxser_port *info = tty->driver_data;
1189 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1195 static int mxser_chars_in_buffer(struct tty_struct *tty)
1197 struct mxser_port *info = tty->driver_data;
1198 int len = info->xmit_cnt;
1200 if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE))
1206 static void mxser_flush_buffer(struct tty_struct *tty)
1208 struct mxser_port *info = tty->driver_data;
1210 unsigned long flags;
1213 spin_lock_irqsave(&info->slock, flags);
1214 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1216 /* below added by shinhay */
1217 fcr = inb(info->ioaddr + UART_FCR);
1218 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1219 info->ioaddr + UART_FCR);
1220 outb(fcr, info->ioaddr + UART_FCR);
1222 spin_unlock_irqrestore(&info->slock, flags);
1223 /* above added by shinhay */
1225 wake_up_interruptible(&tty->write_wait);
1226 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1227 (tty->ldisc.write_wakeup) (tty);
1230 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1232 struct mxser_port *info = tty->driver_data;
1234 struct async_icount cprev, cnow; /* kernel counter temps */
1235 struct serial_icounter_struct __user *p_cuser;
1236 unsigned long templ;
1237 unsigned long flags;
1238 void __user *argp = (void __user *)arg;
1240 if (tty->index == MXSER_PORTS)
1241 return mxser_ioctl_special(cmd, argp);
1243 /* following add by Victor Yu. 01-05-2004 */
1244 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1246 unsigned long opmode;
1247 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1249 unsigned char val, mask;
1252 if (cmd == MOXA_SET_OP_MODE) {
1253 if (get_user(opmode, (int __user *) argp))
1255 if (opmode != RS232_MODE &&
1256 opmode != RS485_2WIRE_MODE &&
1257 opmode != RS422_MODE &&
1258 opmode != RS485_4WIRE_MODE)
1262 val = inb(info->opmode_ioaddr);
1264 val |= (opmode << shiftbit);
1265 outb(val, info->opmode_ioaddr);
1268 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1269 opmode &= OP_MODE_MASK;
1270 if (copy_to_user(argp, &opmode, sizeof(int)))
1275 /* above add by Victor Yu. 01-05-2004 */
1277 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1278 if (tty->flags & (1 << TTY_IO_ERROR))
1282 case TCSBRK: /* SVID version: non-zero arg --> no break */
1283 retval = tty_check_change(tty);
1286 tty_wait_until_sent(tty, 0);
1288 mxser_send_break(info, HZ / 4); /* 1/4 second */
1290 case TCSBRKP: /* support for POSIX tcsendbreak() */
1291 retval = tty_check_change(tty);
1294 tty_wait_until_sent(tty, 0);
1295 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1298 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1300 if (get_user(templ, (unsigned long __user *) argp))
1303 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1306 return mxser_get_serial_info(info, argp);
1308 return mxser_set_serial_info(info, argp);
1309 case TIOCSERGETLSR: /* Get line status register */
1310 return mxser_get_lsr_info(info, argp);
1312 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1313 * - mask passed in arg for lines of interest
1314 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1315 * Caller should use TIOCGICOUNT to see which one it was
1318 DECLARE_WAITQUEUE(wait, current);
1320 spin_lock_irqsave(&info->slock, flags);
1321 cprev = info->icount; /* note the counters on entry */
1322 spin_unlock_irqrestore(&info->slock, flags);
1324 add_wait_queue(&info->delta_msr_wait, &wait);
1326 spin_lock_irqsave(&info->slock, flags);
1327 cnow = info->icount; /* atomic copy */
1328 spin_unlock_irqrestore(&info->slock, flags);
1330 set_current_state(TASK_INTERRUPTIBLE);
1331 if (((arg & TIOCM_RNG) &&
1332 (cnow.rng != cprev.rng)) ||
1333 ((arg & TIOCM_DSR) &&
1334 (cnow.dsr != cprev.dsr)) ||
1335 ((arg & TIOCM_CD) &&
1336 (cnow.dcd != cprev.dcd)) ||
1337 ((arg & TIOCM_CTS) &&
1338 (cnow.cts != cprev.cts))) {
1342 /* see if a signal did it */
1343 if (signal_pending(current)) {
1349 current->state = TASK_RUNNING;
1350 remove_wait_queue(&info->delta_msr_wait, &wait);
1355 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1356 * Return: write counters to the user passed counter struct
1357 * NB: both 1->0 and 0->1 transitions are counted except for
1358 * RI where only 0->1 is counted.
1361 spin_lock_irqsave(&info->slock, flags);
1362 cnow = info->icount;
1363 spin_unlock_irqrestore(&info->slock, flags);
1365 /* modified by casper 1/11/2000 */
1366 if (put_user(cnow.frame, &p_cuser->frame))
1368 if (put_user(cnow.brk, &p_cuser->brk))
1370 if (put_user(cnow.overrun, &p_cuser->overrun))
1372 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1374 if (put_user(cnow.parity, &p_cuser->parity))
1376 if (put_user(cnow.rx, &p_cuser->rx))
1378 if (put_user(cnow.tx, &p_cuser->tx))
1380 put_user(cnow.cts, &p_cuser->cts);
1381 put_user(cnow.dsr, &p_cuser->dsr);
1382 put_user(cnow.rng, &p_cuser->rng);
1383 put_user(cnow.dcd, &p_cuser->dcd);
1385 case MOXA_HighSpeedOn:
1386 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1387 case MOXA_SDS_RSTICOUNTER: {
1388 info->mon_data.rxcnt = 0;
1389 info->mon_data.txcnt = 0;
1392 /* (above) added by James. */
1393 case MOXA_ASPP_SETBAUD:{
1395 if (get_user(baud, (long __user *)argp))
1397 mxser_set_baud(info, baud);
1400 case MOXA_ASPP_GETBAUD:
1401 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1406 case MOXA_ASPP_OQUEUE:{
1409 len = mxser_chars_in_buffer(tty);
1411 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1413 len += (lsr ? 0 : 1);
1415 if (copy_to_user(argp, &len, sizeof(int)))
1420 case MOXA_ASPP_MON: {
1423 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1425 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1426 mxser_check_modem_status(info, status);
1428 mcr = inb(info->ioaddr + UART_MCR);
1429 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1430 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1432 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1434 if (mcr & MOXA_MUST_MCR_TX_XON)
1435 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1437 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1439 if (info->tty->hw_stopped)
1440 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1442 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1444 if (copy_to_user(argp, &info->mon_data,
1445 sizeof(struct mxser_mon)))
1451 case MOXA_ASPP_LSTATUS: {
1452 if (copy_to_user(argp, &info->err_shadow,
1453 sizeof(unsigned char)))
1456 info->err_shadow = 0;
1459 case MOXA_SET_BAUD_METHOD: {
1462 if (get_user(method, (int __user *)argp))
1464 mxser_set_baud_method[tty->index] = method;
1465 if (copy_to_user(argp, &method, sizeof(int)))
1471 return -ENOIOCTLCMD;
1477 #define CMSPAR 010000000000
1480 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 struct mxser_port *port;
1488 /* if (copy_to_user(argp, mxsercfg,
1489 sizeof(struct mxser_hwconf) * 4))
1493 case MOXA_GET_MAJOR:
1494 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1498 case MOXA_GET_CUMAJOR:
1499 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1503 case MOXA_CHKPORTENABLE:
1506 for (i = 0; i < MXSER_BOARDS; i++)
1507 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1508 if (mxser_boards[i].ports[j].ioaddr)
1511 return put_user(result, (unsigned long __user *)argp);
1512 case MOXA_GETDATACOUNT:
1513 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1516 case MOXA_GETMSTATUS:
1517 for (i = 0; i < MXSER_BOARDS; i++)
1518 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1519 port = &mxser_boards[i].ports[j];
1522 if (!port->ioaddr) {
1523 GMStatus[i].dcd = 0;
1524 GMStatus[i].dsr = 0;
1525 GMStatus[i].cts = 0;
1529 if (!port->tty || !port->tty->termios)
1531 port->normal_termios.c_cflag;
1534 port->tty->termios->c_cflag;
1536 status = inb(port->ioaddr + UART_MSR);
1537 if (status & 0x80 /*UART_MSR_DCD */ )
1538 GMStatus[i].dcd = 1;
1540 GMStatus[i].dcd = 0;
1542 if (status & 0x20 /*UART_MSR_DSR */ )
1543 GMStatus[i].dsr = 1;
1545 GMStatus[i].dsr = 0;
1548 if (status & 0x10 /*UART_MSR_CTS */ )
1549 GMStatus[i].cts = 1;
1551 GMStatus[i].cts = 0;
1553 if (copy_to_user(argp, GMStatus,
1554 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1557 case MOXA_ASPP_MON_EXT: {
1558 int status, p, shiftbit;
1559 unsigned long opmode;
1560 unsigned cflag, iflag;
1562 for (i = 0; i < MXSER_BOARDS; i++)
1563 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1564 port = &mxser_boards[i].ports[j];
1568 status = mxser_get_msr(port->ioaddr, 0, i);
1569 /* mxser_check_modem_status(port, status); */
1571 if (status & UART_MSR_TERI)
1573 if (status & UART_MSR_DDSR)
1575 if (status & UART_MSR_DDCD)
1577 if (status & UART_MSR_DCTS)
1580 port->mon_data.modem_status = status;
1581 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1582 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1583 mon_data_ext.up_rxcnt[i] =
1584 port->mon_data.up_rxcnt;
1585 mon_data_ext.up_txcnt[i] =
1586 port->mon_data.up_txcnt;
1587 mon_data_ext.modem_status[i] =
1588 port->mon_data.modem_status;
1589 mon_data_ext.baudrate[i] = port->realbaud;
1591 if (!port->tty || !port->tty->termios) {
1592 cflag = port->normal_termios.c_cflag;
1593 iflag = port->normal_termios.c_iflag;
1595 cflag = port->tty->termios->c_cflag;
1596 iflag = port->tty->termios->c_iflag;
1599 mon_data_ext.databits[i] = cflag & CSIZE;
1601 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1603 mon_data_ext.parity[i] =
1604 cflag & (PARENB | PARODD | CMSPAR);
1606 mon_data_ext.flowctrl[i] = 0x00;
1608 if (cflag & CRTSCTS)
1609 mon_data_ext.flowctrl[i] |= 0x03;
1611 if (iflag & (IXON | IXOFF))
1612 mon_data_ext.flowctrl[i] |= 0x0C;
1614 if (port->type == PORT_16550A)
1615 mon_data_ext.fifo[i] = 1;
1617 mon_data_ext.fifo[i] = 0;
1621 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1622 opmode &= OP_MODE_MASK;
1624 mon_data_ext.iftype[i] = opmode;
1627 if (copy_to_user(argp, &mon_data_ext,
1628 sizeof(mon_data_ext)))
1634 return -ENOIOCTLCMD;
1639 static void mxser_stoprx(struct tty_struct *tty)
1641 struct mxser_port *info = tty->driver_data;
1643 info->ldisc_stop_rx = 1;
1645 /* following add by Victor Yu. 09-02-2002 */
1646 if (info->board->chip_flag) {
1647 info->IER &= ~MOXA_MUST_RECV_ISR;
1648 outb(info->IER, info->ioaddr + UART_IER);
1649 } else if (!(info->flags & ASYNC_CLOSING)) {
1650 info->x_char = STOP_CHAR(tty);
1651 outb(0, info->ioaddr + UART_IER);
1652 info->IER |= UART_IER_THRI;
1653 outb(info->IER, info->ioaddr + UART_IER);
1657 if (info->tty->termios->c_cflag & CRTSCTS) {
1658 info->MCR &= ~UART_MCR_RTS;
1659 outb(info->MCR, info->ioaddr + UART_MCR);
1663 static void mxser_startrx(struct tty_struct *tty)
1665 struct mxser_port *info = tty->driver_data;
1667 info->ldisc_stop_rx = 0;
1672 /* following add by Victor Yu. 09-02-2002 */
1673 if (info->board->chip_flag) {
1674 info->IER |= MOXA_MUST_RECV_ISR;
1675 outb(info->IER, info->ioaddr + UART_IER);
1676 } else if (!(info->flags & ASYNC_CLOSING)) {
1677 info->x_char = START_CHAR(tty);
1678 outb(0, info->ioaddr + UART_IER);
1679 info->IER |= UART_IER_THRI;
1680 outb(info->IER, info->ioaddr + UART_IER);
1685 if (info->tty->termios->c_cflag & CRTSCTS) {
1686 info->MCR |= UART_MCR_RTS;
1687 outb(info->MCR, info->ioaddr + UART_MCR);
1692 * This routine is called by the upper-layer tty layer to signal that
1693 * incoming characters should be throttled.
1695 static void mxser_throttle(struct tty_struct *tty)
1697 struct mxser_port *info = tty->driver_data;
1698 unsigned long flags;
1700 spin_lock_irqsave(&info->slock, flags);
1702 spin_unlock_irqrestore(&info->slock, flags);
1705 static void mxser_unthrottle(struct tty_struct *tty)
1707 struct mxser_port *info = tty->driver_data;
1708 unsigned long flags;
1710 spin_lock_irqsave(&info->slock, flags);
1712 spin_unlock_irqrestore(&info->slock, flags);
1715 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1717 struct mxser_port *info = tty->driver_data;
1718 unsigned long flags;
1720 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1721 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1723 mxser_change_speed(info, old_termios);
1725 if ((old_termios->c_cflag & CRTSCTS) &&
1726 !(tty->termios->c_cflag & CRTSCTS)) {
1727 tty->hw_stopped = 0;
1732 /* Handle sw stopped */
1733 if ((old_termios->c_iflag & IXON) &&
1734 !(tty->termios->c_iflag & IXON)) {
1737 /* following add by Victor Yu. 09-02-2002 */
1738 if (info->board->chip_flag) {
1739 spin_lock_irqsave(&info->slock, flags);
1740 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1741 spin_unlock_irqrestore(&info->slock, flags);
1743 /* above add by Victor Yu. 09-02-2002 */
1750 * mxser_stop() and mxser_start()
1752 * This routines are called before setting or resetting tty->stopped.
1753 * They enable or disable transmitter interrupts, as necessary.
1755 static void mxser_stop(struct tty_struct *tty)
1757 struct mxser_port *info = tty->driver_data;
1758 unsigned long flags;
1760 spin_lock_irqsave(&info->slock, flags);
1761 if (info->IER & UART_IER_THRI) {
1762 info->IER &= ~UART_IER_THRI;
1763 outb(info->IER, info->ioaddr + UART_IER);
1765 spin_unlock_irqrestore(&info->slock, flags);
1768 static void mxser_start(struct tty_struct *tty)
1770 struct mxser_port *info = tty->driver_data;
1771 unsigned long flags;
1773 spin_lock_irqsave(&info->slock, flags);
1774 if (info->xmit_cnt && info->xmit_buf
1775 /* && !(info->IER & UART_IER_THRI) */) {
1776 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1777 info->IER |= UART_IER_THRI;
1778 outb(info->IER, info->ioaddr + UART_IER);
1780 spin_unlock_irqrestore(&info->slock, flags);
1784 * mxser_wait_until_sent() --- wait until the transmitter is empty
1786 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1788 struct mxser_port *info = tty->driver_data;
1789 unsigned long orig_jiffies, char_time;
1792 if (info->type == PORT_UNKNOWN)
1795 if (info->xmit_fifo_size == 0)
1796 return; /* Just in case.... */
1798 orig_jiffies = jiffies;
1800 * Set the check interval to be 1/5 of the estimated time to
1801 * send a single character, and make it at least 1. The check
1802 * interval should also be less than the timeout.
1804 * Note: we have to use pretty tight timings here to satisfy
1807 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1808 char_time = char_time / 5;
1811 if (timeout && timeout < char_time)
1812 char_time = timeout;
1814 * If the transmitter hasn't cleared in twice the approximate
1815 * amount of time to send the entire FIFO, it probably won't
1816 * ever clear. This assumes the UART isn't doing flow
1817 * control, which is currently the case. Hence, if it ever
1818 * takes longer than info->timeout, this is probably due to a
1819 * UART bug of some kind. So, we clamp the timeout parameter at
1822 if (!timeout || timeout > 2 * info->timeout)
1823 timeout = 2 * info->timeout;
1824 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1825 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1826 timeout, char_time);
1827 printk("jiff=%lu...", jiffies);
1829 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1830 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1831 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1833 schedule_timeout_interruptible(char_time);
1834 if (signal_pending(current))
1836 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1839 set_current_state(TASK_RUNNING);
1841 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1842 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1848 * This routine is called by tty_hangup() when a hangup is signaled.
1850 void mxser_hangup(struct tty_struct *tty)
1852 struct mxser_port *info = tty->driver_data;
1854 mxser_flush_buffer(tty);
1855 mxser_shutdown(info);
1858 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1860 wake_up_interruptible(&info->open_wait);
1864 /* added by James 03-12-2004. */
1866 * mxser_rs_break() --- routine which turns the break handling on or off
1868 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1870 struct mxser_port *info = tty->driver_data;
1871 unsigned long flags;
1873 spin_lock_irqsave(&info->slock, flags);
1874 if (break_state == -1)
1875 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1876 info->ioaddr + UART_LCR);
1878 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1879 info->ioaddr + UART_LCR);
1880 spin_unlock_irqrestore(&info->slock, flags);
1883 /* (above) added by James. */
1887 * This is the serial driver's generic interrupt routine
1889 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1892 struct mxser_board *brd = NULL;
1893 struct mxser_port *port;
1894 int max, irqbits, bits, msr;
1895 int pass_counter = 0;
1896 unsigned int int_cnt;
1897 int handled = IRQ_NONE;
1899 /* spin_lock(&gm_lock); */
1901 for (i = 0; i < MXSER_BOARDS; i++)
1902 if (dev_id == &mxser_boards[i]) {
1907 if (i == MXSER_BOARDS)
1911 max = mxser_numports[brd->board_type - 1];
1913 irqbits = inb(brd->vector) & brd->vector_mask;
1914 if (irqbits == brd->vector_mask)
1917 handled = IRQ_HANDLED;
1918 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1919 if (irqbits == brd->vector_mask)
1923 port = &brd->ports[i];
1927 /* following add by Victor Yu. 09-13-2002 */
1928 iir = inb(port->ioaddr + UART_IIR);
1929 if (iir & UART_IIR_NO_INT)
1931 iir &= MOXA_MUST_IIR_MASK;
1933 status = inb(port->ioaddr + UART_LSR);
1934 outb(0x27, port->ioaddr + UART_FCR);
1935 inb(port->ioaddr + UART_MSR);
1938 /* above add by Victor Yu. 09-13-2002 */
1940 spin_lock(&port->slock);
1941 /* following add by Victor Yu. 09-02-2002 */
1942 status = inb(port->ioaddr + UART_LSR);
1944 if (status & UART_LSR_PE)
1945 port->err_shadow |= NPPI_NOTIFY_PARITY;
1946 if (status & UART_LSR_FE)
1947 port->err_shadow |= NPPI_NOTIFY_FRAMING;
1948 if (status & UART_LSR_OE)
1950 NPPI_NOTIFY_HW_OVERRUN;
1951 if (status & UART_LSR_BI)
1952 port->err_shadow |= NPPI_NOTIFY_BREAK;
1954 if (port->board->chip_flag) {
1956 if ( (status & 0x02) && !(status & 0x01) ) {
1957 outb(port->ioaddr+UART_FCR, 0x23);
1961 if (iir == MOXA_MUST_IIR_GDA ||
1962 iir == MOXA_MUST_IIR_RDA ||
1963 iir == MOXA_MUST_IIR_RTO ||
1964 iir == MOXA_MUST_IIR_LSR)
1965 mxser_receive_chars(port,
1969 /* above add by Victor Yu. 09-02-2002 */
1971 status &= port->read_status_mask;
1972 if (status & UART_LSR_DR)
1973 mxser_receive_chars(port,
1976 msr = inb(port->ioaddr + UART_MSR);
1977 if (msr & UART_MSR_ANY_DELTA)
1978 mxser_check_modem_status(port, msr);
1980 /* following add by Victor Yu. 09-13-2002 */
1981 if (port->board->chip_flag) {
1982 if (iir == 0x02 && (status &
1984 mxser_transmit_chars(port);
1986 /* above add by Victor Yu. 09-13-2002 */
1988 if (status & UART_LSR_THRE)
1989 mxser_transmit_chars(port);
1991 spin_unlock(&port->slock);
1992 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
1994 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
1995 break; /* Prevent infinite loops */
1999 /* spin_unlock(&gm_lock); */
2003 static void mxser_receive_chars(struct mxser_port *port, int *status)
2005 struct tty_struct *tty = port->tty;
2006 unsigned char ch, gdl;
2011 unsigned long flags;
2013 spin_lock_irqsave(&port->slock, flags);
2015 recv_room = tty->receive_room;
2016 if ((recv_room == 0) && (!port->ldisc_stop_rx)) {
2017 /* mxser_throttle(tty); */
2022 /* following add by Victor Yu. 09-02-2002 */
2023 if (port->board->chip_flag != MOXA_OTHER_UART) {
2025 if (*status & UART_LSR_SPECIAL)
2027 /* following add by Victor Yu. 02-11-2004 */
2028 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2029 (*status & MOXA_MUST_LSR_RERR))
2031 /* above add by Victor Yu. 02-14-2004 */
2032 if (*status & MOXA_MUST_LSR_RERR)
2035 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2037 /* add by Victor Yu. 02-11-2004 */
2038 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2039 gdl &= MOXA_MUST_GDL_MASK;
2040 if (gdl >= recv_room) {
2041 if (!port->ldisc_stop_rx) {
2042 /* mxser_throttle(tty); */
2048 ch = inb(port->ioaddr + UART_RX);
2049 tty_insert_flip_char(tty, ch, 0);
2055 /* above add by Victor Yu. 09-02-2002 */
2061 ch = inb(port->ioaddr + UART_RX);
2062 /* following add by Victor Yu. 09-02-2002 */
2063 if (port->board->chip_flag && (*status & UART_LSR_OE)
2064 /*&& !(*status&UART_LSR_DR) */)
2065 outb(0x23, port->ioaddr + UART_FCR);
2066 *status &= port->read_status_mask;
2067 /* above add by Victor Yu. 09-02-2002 */
2068 if (*status & port->ignore_status_mask) {
2069 if (++ignored > 100)
2073 if (*status & UART_LSR_SPECIAL) {
2074 if (*status & UART_LSR_BI) {
2076 /* added by casper 1/11/2000 */
2079 if (port->flags & ASYNC_SAK)
2081 } else if (*status & UART_LSR_PE) {
2083 /* added by casper 1/11/2000 */
2084 port->icount.parity++;
2085 } else if (*status & UART_LSR_FE) {
2087 /* added by casper 1/11/2000 */
2088 port->icount.frame++;
2089 } else if (*status & UART_LSR_OE) {
2091 /* added by casper 1/11/2000 */
2092 port->icount.overrun++;
2097 tty_insert_flip_char(tty, ch, flag);
2099 if (cnt >= recv_room) {
2100 if (!port->ldisc_stop_rx) {
2101 /* mxser_throttle(tty); */
2109 /* following add by Victor Yu. 09-02-2002 */
2110 if (port->board->chip_flag)
2113 /* mask by Victor Yu. 09-02-2002
2114 *status = inb(port->ioaddr + UART_LSR) & port->read_status_mask;
2116 /* following add by Victor Yu. 09-02-2002 */
2117 *status = inb(port->ioaddr + UART_LSR);
2118 /* above add by Victor Yu. 09-02-2002 */
2119 } while (*status & UART_LSR_DR);
2121 end_intr: /* add by Victor Yu. 09-02-2002 */
2122 mxvar_log.rxcnt[port->tty->index] += cnt;
2123 port->mon_data.rxcnt += cnt;
2124 port->mon_data.up_rxcnt += cnt;
2125 spin_unlock_irqrestore(&port->slock, flags);
2127 tty_flip_buffer_push(tty);
2130 static void mxser_transmit_chars(struct mxser_port *port)
2133 unsigned long flags;
2135 spin_lock_irqsave(&port->slock, flags);
2138 outb(port->x_char, port->ioaddr + UART_TX);
2140 mxvar_log.txcnt[port->tty->index]++;
2141 port->mon_data.txcnt++;
2142 port->mon_data.up_txcnt++;
2144 /* added by casper 1/11/2000 */
2149 if (port->xmit_buf == 0)
2152 if (port->xmit_cnt == 0) {
2153 if (port->xmit_cnt < WAKEUP_CHARS) { /* XXX what's this for?? */
2154 set_bit(MXSER_EVENT_TXLOW, &port->event);
2155 schedule_work(&port->tqueue);
2159 if (port->tty->stopped || (port->tty->hw_stopped &&
2160 (port->type != PORT_16550A) &&
2161 (!port->board->chip_flag))) {
2162 port->IER &= ~UART_IER_THRI;
2163 outb(port->IER, port->ioaddr + UART_IER);
2167 cnt = port->xmit_cnt;
2168 count = port->xmit_fifo_size;
2170 outb(port->xmit_buf[port->xmit_tail++],
2171 port->ioaddr + UART_TX);
2172 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2173 if (--port->xmit_cnt <= 0)
2175 } while (--count > 0);
2176 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2178 /* added by James 03-12-2004. */
2179 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2180 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2182 /* added by casper 1/11/2000 */
2183 port->icount.tx += (cnt - port->xmit_cnt);
2185 if (port->xmit_cnt < WAKEUP_CHARS) {
2186 set_bit(MXSER_EVENT_TXLOW, &port->event);
2187 schedule_work(&port->tqueue);
2189 if (port->xmit_cnt <= 0) {
2190 port->IER &= ~UART_IER_THRI;
2191 outb(port->IER, port->ioaddr + UART_IER);
2194 spin_unlock_irqrestore(&port->slock, flags);
2197 static void mxser_check_modem_status(struct mxser_port *port, int status)
2199 /* update input line counters */
2200 if (status & UART_MSR_TERI)
2202 if (status & UART_MSR_DDSR)
2204 if (status & UART_MSR_DDCD)
2206 if (status & UART_MSR_DCTS)
2208 port->mon_data.modem_status = status;
2209 wake_up_interruptible(&port->delta_msr_wait);
2211 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2212 if (status & UART_MSR_DCD)
2213 wake_up_interruptible(&port->open_wait);
2214 schedule_work(&port->tqueue);
2217 if (port->flags & ASYNC_CTS_FLOW) {
2218 if (port->tty->hw_stopped) {
2219 if (status & UART_MSR_CTS) {
2220 port->tty->hw_stopped = 0;
2222 if ((port->type != PORT_16550A) &&
2223 (!port->board->chip_flag)) {
2224 outb(port->IER & ~UART_IER_THRI,
2225 port->ioaddr + UART_IER);
2226 port->IER |= UART_IER_THRI;
2227 outb(port->IER, port->ioaddr +
2230 set_bit(MXSER_EVENT_TXLOW, &port->event);
2231 schedule_work(&port->tqueue);
2234 if (!(status & UART_MSR_CTS)) {
2235 port->tty->hw_stopped = 1;
2236 if (port->type != PORT_16550A &&
2237 !port->board->chip_flag) {
2238 port->IER &= ~UART_IER_THRI;
2239 outb(port->IER, port->ioaddr +
2247 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_port *port)
2249 DECLARE_WAITQUEUE(wait, current);
2252 unsigned long flags;
2255 * If non-blocking mode is set, or the port is not enabled,
2256 * then make the check up front and then exit.
2258 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2259 port->flags |= ASYNC_NORMAL_ACTIVE;
2263 if (tty->termios->c_cflag & CLOCAL)
2267 * Block waiting for the carrier detect and the line to become
2268 * free (i.e., not in use by the callout). While we are in
2269 * this loop, port->count is dropped by one, so that
2270 * mxser_close() knows when to free things. We restore it upon
2271 * exit, either normal or abnormal.
2274 add_wait_queue(&port->open_wait, &wait);
2276 spin_lock_irqsave(&port->slock, flags);
2277 if (!tty_hung_up_p(filp))
2279 spin_unlock_irqrestore(&port->slock, flags);
2280 port->blocked_open++;
2282 spin_lock_irqsave(&port->slock, flags);
2283 outb(inb(port->ioaddr + UART_MCR) |
2284 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
2285 spin_unlock_irqrestore(&port->slock, flags);
2286 set_current_state(TASK_INTERRUPTIBLE);
2287 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
2288 if (port->flags & ASYNC_HUP_NOTIFY)
2291 retval = -ERESTARTSYS;
2294 if (!(port->flags & ASYNC_CLOSING) &&
2296 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
2298 if (signal_pending(current)) {
2299 retval = -ERESTARTSYS;
2304 set_current_state(TASK_RUNNING);
2305 remove_wait_queue(&port->open_wait, &wait);
2306 if (!tty_hung_up_p(filp))
2308 port->blocked_open--;
2311 port->flags |= ASYNC_NORMAL_ACTIVE;
2315 static int mxser_startup(struct mxser_port *info)
2318 unsigned long flags;
2320 page = __get_free_page(GFP_KERNEL);
2324 spin_lock_irqsave(&info->slock, flags);
2326 if (info->flags & ASYNC_INITIALIZED) {
2328 spin_unlock_irqrestore(&info->slock, flags);
2332 if (!info->ioaddr || !info->type) {
2334 set_bit(TTY_IO_ERROR, &info->tty->flags);
2336 spin_unlock_irqrestore(&info->slock, flags);
2342 info->xmit_buf = (unsigned char *) page;
2345 * Clear the FIFO buffers and disable them
2346 * (they will be reenabled in mxser_change_speed())
2348 if (info->board->chip_flag)
2349 outb((UART_FCR_CLEAR_RCVR |
2350 UART_FCR_CLEAR_XMIT |
2351 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
2353 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2354 info->ioaddr + UART_FCR);
2357 * At this point there's no way the LSR could still be 0xFF;
2358 * if it is, then bail out, because there's likely no UART
2361 if (inb(info->ioaddr + UART_LSR) == 0xff) {
2362 spin_unlock_irqrestore(&info->slock, flags);
2363 if (capable(CAP_SYS_ADMIN)) {
2365 set_bit(TTY_IO_ERROR, &info->tty->flags);
2372 * Clear the interrupt registers.
2374 (void) inb(info->ioaddr + UART_LSR);
2375 (void) inb(info->ioaddr + UART_RX);
2376 (void) inb(info->ioaddr + UART_IIR);
2377 (void) inb(info->ioaddr + UART_MSR);
2380 * Now, initialize the UART
2382 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
2383 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2384 outb(info->MCR, info->ioaddr + UART_MCR);
2387 * Finally, enable interrupts
2389 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2390 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2392 /* following add by Victor Yu. 08-30-2002 */
2393 if (info->board->chip_flag)
2394 info->IER |= MOXA_MUST_IER_EGDAI;
2395 /* above add by Victor Yu. 08-30-2002 */
2396 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
2399 * And clear the interrupt registers again for luck.
2401 (void) inb(info->ioaddr + UART_LSR);
2402 (void) inb(info->ioaddr + UART_RX);
2403 (void) inb(info->ioaddr + UART_IIR);
2404 (void) inb(info->ioaddr + UART_MSR);
2407 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2408 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2411 * and set the speed of the serial port
2413 spin_unlock_irqrestore(&info->slock, flags);
2414 mxser_change_speed(info, NULL);
2416 info->flags |= ASYNC_INITIALIZED;
2421 * This routine will shutdown a serial port; interrupts maybe disabled, and
2422 * DTR is dropped if the hangup on close termio flag is on.
2424 static void mxser_shutdown(struct mxser_port *info)
2426 unsigned long flags;
2428 if (!(info->flags & ASYNC_INITIALIZED))
2431 spin_lock_irqsave(&info->slock, flags);
2434 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2435 * here so the queue might never be waken up
2437 wake_up_interruptible(&info->delta_msr_wait);
2440 * Free the IRQ, if necessary
2442 if (info->xmit_buf) {
2443 free_page((unsigned long) info->xmit_buf);
2444 info->xmit_buf = NULL;
2448 outb(0x00, info->ioaddr + UART_IER);
2450 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2451 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2452 outb(info->MCR, info->ioaddr + UART_MCR);
2454 /* clear Rx/Tx FIFO's */
2455 /* following add by Victor Yu. 08-30-2002 */
2456 if (info->board->chip_flag)
2457 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
2458 MOXA_MUST_FCR_GDA_MODE_ENABLE,
2459 info->ioaddr + UART_FCR);
2461 /* above add by Victor Yu. 08-30-2002 */
2462 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
2463 info->ioaddr + UART_FCR);
2465 /* read data port to reset things */
2466 (void) inb(info->ioaddr + UART_RX);
2469 set_bit(TTY_IO_ERROR, &info->tty->flags);
2471 info->flags &= ~ASYNC_INITIALIZED;
2473 /* following add by Victor Yu. 09-23-2002 */
2474 if (info->board->chip_flag)
2475 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2476 /* above add by Victor Yu. 09-23-2002 */
2478 spin_unlock_irqrestore(&info->slock, flags);
2482 * This routine is called to set the UART divisor registers to match
2483 * the specified baud rate for a serial port.
2485 static int mxser_change_speed(struct mxser_port *info,
2486 struct termios *old_termios)
2488 unsigned cflag, cval, fcr;
2490 unsigned char status;
2492 unsigned long flags;
2494 if (!info->tty || !info->tty->termios)
2496 cflag = info->tty->termios->c_cflag;
2497 if (!(info->ioaddr))
2501 #define B921600 (B460800 +1)
2503 if (mxser_set_baud_method[info->tty->index] == 0) {
2504 baud = tty_get_baud_rate(info->tty);
2505 mxser_set_baud(info, baud);
2508 /* byte size and parity */
2509 switch (cflag & CSIZE) {
2524 break; /* too keep GCC shut... */
2529 cval |= UART_LCR_PARITY;
2530 if (!(cflag & PARODD))
2531 cval |= UART_LCR_EPAR;
2533 cval |= UART_LCR_SPAR;
2535 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2536 if (info->board->chip_flag) {
2537 fcr = UART_FCR_ENABLE_FIFO;
2538 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2539 SET_MOXA_MUST_FIFO_VALUE(info);
2543 fcr = UART_FCR_ENABLE_FIFO;
2544 /* following add by Victor Yu. 08-30-2002 */
2545 if (info->board->chip_flag) {
2546 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2547 SET_MOXA_MUST_FIFO_VALUE(info);
2549 /* above add by Victor Yu. 08-30-2002 */
2550 switch (info->rx_trigger) {
2552 fcr |= UART_FCR_TRIGGER_1;
2555 fcr |= UART_FCR_TRIGGER_4;
2558 fcr |= UART_FCR_TRIGGER_8;
2561 fcr |= UART_FCR_TRIGGER_14;
2567 /* CTS flow control flag and modem status interrupts */
2568 info->IER &= ~UART_IER_MSI;
2569 info->MCR &= ~UART_MCR_AFE;
2570 if (cflag & CRTSCTS) {
2571 info->flags |= ASYNC_CTS_FLOW;
2572 info->IER |= UART_IER_MSI;
2573 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
2574 info->MCR |= UART_MCR_AFE;
2575 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2579 status = inb(baseaddr + UART_MSR);
2580 restore_flags(flags);
2582 /* mxser_check_modem_status(info, status); */
2584 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2585 /* MX_LOCK(&info->slock); */
2586 status = inb(info->ioaddr + UART_MSR);
2587 /* MX_UNLOCK(&info->slock); */
2588 if (info->tty->hw_stopped) {
2589 if (status & UART_MSR_CTS) {
2590 info->tty->hw_stopped = 0;
2591 if (info->type != PORT_16550A &&
2592 !info->board->chip_flag) {
2593 outb(info->IER & ~UART_IER_THRI,
2596 info->IER |= UART_IER_THRI;
2597 outb(info->IER, info->ioaddr +
2600 set_bit(MXSER_EVENT_TXLOW, &info->event);
2601 schedule_work(&info->tqueue); }
2603 if (!(status & UART_MSR_CTS)) {
2604 info->tty->hw_stopped = 1;
2605 if ((info->type != PORT_16550A) &&
2606 (!info->board->chip_flag)) {
2607 info->IER &= ~UART_IER_THRI;
2608 outb(info->IER, info->ioaddr +
2615 info->flags &= ~ASYNC_CTS_FLOW;
2617 outb(info->MCR, info->ioaddr + UART_MCR);
2618 if (cflag & CLOCAL) {
2619 info->flags &= ~ASYNC_CHECK_CD;
2621 info->flags |= ASYNC_CHECK_CD;
2622 info->IER |= UART_IER_MSI;
2624 outb(info->IER, info->ioaddr + UART_IER);
2627 * Set up parity check flag
2629 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2630 if (I_INPCK(info->tty))
2631 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2632 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2633 info->read_status_mask |= UART_LSR_BI;
2635 info->ignore_status_mask = 0;
2637 if (I_IGNBRK(info->tty)) {
2638 info->ignore_status_mask |= UART_LSR_BI;
2639 info->read_status_mask |= UART_LSR_BI;
2641 * If we're ignore parity and break indicators, ignore
2642 * overruns too. (For real raw support).
2644 if (I_IGNPAR(info->tty)) {
2645 info->ignore_status_mask |=
2649 info->read_status_mask |=
2655 /* following add by Victor Yu. 09-02-2002 */
2656 if (info->board->chip_flag) {
2657 spin_lock_irqsave(&info->slock, flags);
2658 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
2659 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
2660 if (I_IXON(info->tty)) {
2661 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2663 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2665 if (I_IXOFF(info->tty)) {
2666 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2668 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2671 if ( I_IXANY(info->tty) ) {
2672 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2673 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2675 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2676 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2679 spin_unlock_irqrestore(&info->slock, flags);
2681 /* above add by Victor Yu. 09-02-2002 */
2684 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
2685 outb(cval, info->ioaddr + UART_LCR);
2691 static int mxser_set_baud(struct mxser_port *info, long newspd)
2696 unsigned long flags;
2698 if (!info->tty || !info->tty->termios)
2701 if (!(info->ioaddr))
2704 if (newspd > info->max_baud)
2707 info->realbaud = newspd;
2708 if (newspd == 134) {
2709 quot = (2 * info->baud_base / 269);
2710 } else if (newspd) {
2711 quot = info->baud_base / newspd;
2718 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2719 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2722 spin_lock_irqsave(&info->slock, flags);
2723 info->MCR |= UART_MCR_DTR;
2724 outb(info->MCR, info->ioaddr + UART_MCR);
2725 spin_unlock_irqrestore(&info->slock, flags);
2727 spin_lock_irqsave(&info->slock, flags);
2728 info->MCR &= ~UART_MCR_DTR;
2729 outb(info->MCR, info->ioaddr + UART_MCR);
2730 spin_unlock_irqrestore(&info->slock, flags);
2734 cval = inb(info->ioaddr + UART_LCR);
2736 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
2738 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
2739 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
2740 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
2747 * ------------------------------------------------------------
2748 * friends of mxser_ioctl()
2749 * ------------------------------------------------------------
2751 static int mxser_get_serial_info(struct mxser_port *info,
2752 struct serial_struct __user *retinfo)
2754 struct serial_struct tmp;
2758 memset(&tmp, 0, sizeof(tmp));
2759 tmp.type = info->type;
2760 tmp.line = info->tty->index;
2761 tmp.port = info->ioaddr;
2762 tmp.irq = info->board->irq;
2763 tmp.flags = info->flags;
2764 tmp.baud_base = info->baud_base;
2765 tmp.close_delay = info->close_delay;
2766 tmp.closing_wait = info->closing_wait;
2767 tmp.custom_divisor = info->custom_divisor;
2769 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2774 static int mxser_set_serial_info(struct mxser_port *info,
2775 struct serial_struct __user *new_info)
2777 struct serial_struct new_serial;
2781 if (!new_info || !info->ioaddr)
2783 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2786 if ((new_serial.irq != info->board->irq) ||
2787 (new_serial.port != info->ioaddr) ||
2788 (new_serial.custom_divisor != info->custom_divisor) ||
2789 (new_serial.baud_base != info->baud_base))
2792 flags = info->flags & ASYNC_SPD_MASK;
2794 if (!capable(CAP_SYS_ADMIN)) {
2795 if ((new_serial.baud_base != info->baud_base) ||
2796 (new_serial.close_delay != info->close_delay) ||
2797 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2799 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2800 (new_serial.flags & ASYNC_USR_MASK));
2803 * OK, past this point, all the error checking has been done.
2804 * At this point, we start making changes.....
2806 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2807 (new_serial.flags & ASYNC_FLAGS));
2808 info->close_delay = new_serial.close_delay * HZ / 100;
2809 info->closing_wait = new_serial.closing_wait * HZ / 100;
2810 info->tty->low_latency =
2811 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2812 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2815 /* added by casper, 3/17/2000, for mouse */
2816 info->type = new_serial.type;
2818 process_txrx_fifo(info);
2820 if (info->flags & ASYNC_INITIALIZED) {
2821 if (flags != (info->flags & ASYNC_SPD_MASK))
2822 mxser_change_speed(info, NULL);
2824 retval = mxser_startup(info);
2830 * mxser_get_lsr_info - get line status register info
2832 * Purpose: Let user call ioctl() to get info when the UART physically
2833 * is emptied. On bus types like RS485, the transmitter must
2834 * release the bus after transmitting. This must be done when
2835 * the transmit shift register is empty, not be done when the
2836 * transmit holding register is empty. This functionality
2837 * allows an RS485 driver to be written in user space.
2839 static int mxser_get_lsr_info(struct mxser_port *info,
2840 unsigned int __user *value)
2842 unsigned char status;
2843 unsigned int result;
2844 unsigned long flags;
2846 spin_lock_irqsave(&info->slock, flags);
2847 status = inb(info->ioaddr + UART_LSR);
2848 spin_unlock_irqrestore(&info->slock, flags);
2849 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2850 return put_user(result, value);
2854 * This routine sends a break character out the serial port.
2856 static void mxser_send_break(struct mxser_port *info, int duration)
2858 unsigned long flags;
2862 set_current_state(TASK_INTERRUPTIBLE);
2863 spin_lock_irqsave(&info->slock, flags);
2864 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2865 info->ioaddr + UART_LCR);
2866 spin_unlock_irqrestore(&info->slock, flags);
2867 schedule_timeout(duration);
2868 spin_lock_irqsave(&info->slock, flags);
2869 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2870 info->ioaddr + UART_LCR);
2871 spin_unlock_irqrestore(&info->slock, flags);
2874 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2876 struct mxser_port *info = tty->driver_data;
2877 unsigned char control, status;
2878 unsigned long flags;
2881 if (tty->index == MXSER_PORTS)
2882 return -ENOIOCTLCMD;
2883 if (tty->flags & (1 << TTY_IO_ERROR))
2886 control = info->MCR;
2888 spin_lock_irqsave(&info->slock, flags);
2889 status = inb(info->ioaddr + UART_MSR);
2890 if (status & UART_MSR_ANY_DELTA)
2891 mxser_check_modem_status(info, status);
2892 spin_unlock_irqrestore(&info->slock, flags);
2893 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2894 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2895 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2896 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2897 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2898 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2901 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
2902 unsigned int set, unsigned int clear)
2904 struct mxser_port *info = tty->driver_data;
2905 unsigned long flags;
2908 if (tty->index == MXSER_PORTS)
2909 return -ENOIOCTLCMD;
2910 if (tty->flags & (1 << TTY_IO_ERROR))
2913 spin_lock_irqsave(&info->slock, flags);
2915 if (set & TIOCM_RTS)
2916 info->MCR |= UART_MCR_RTS;
2917 if (set & TIOCM_DTR)
2918 info->MCR |= UART_MCR_DTR;
2920 if (clear & TIOCM_RTS)
2921 info->MCR &= ~UART_MCR_RTS;
2922 if (clear & TIOCM_DTR)
2923 info->MCR &= ~UART_MCR_DTR;
2925 outb(info->MCR, info->ioaddr + UART_MCR);
2926 spin_unlock_irqrestore(&info->slock, flags);
2931 static int mxser_read_register(int, unsigned short *);
2932 static int mxser_program_mode(int);
2933 static void mxser_normal_mode(int);
2935 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2938 unsigned short regs[16], irq;
2939 unsigned char scratch, scratch2;
2941 brd->chip_flag = MOXA_OTHER_UART;
2943 id = mxser_read_register(cap, regs);
2944 if (id == C168_ASIC_ID) {
2945 brd->board_type = MXSER_BOARD_C168_ISA;
2947 } else if (id == C104_ASIC_ID) {
2948 brd->board_type = MXSER_BOARD_C104_ISA;
2950 } else if (id == C102_ASIC_ID) {
2951 brd->board_type = MXSER_BOARD_C102_ISA;
2953 } else if (id == CI132_ASIC_ID) {
2954 brd->board_type = MXSER_BOARD_CI132;
2956 } else if (id == CI134_ASIC_ID) {
2957 brd->board_type = MXSER_BOARD_CI134;
2959 } else if (id == CI104J_ASIC_ID) {
2960 brd->board_type = MXSER_BOARD_CI104J;
2966 if (brd->nports == 2) {
2967 irq = regs[9] & 0xF000;
2968 irq = irq | (irq >> 4);
2969 if (irq != (regs[9] & 0xFF00))
2970 return MXSER_ERR_IRQ_CONFLIT;
2971 } else if (brd->nports == 4) {
2972 irq = regs[9] & 0xF000;
2973 irq = irq | (irq >> 4);
2974 irq = irq | (irq >> 8);
2976 return MXSER_ERR_IRQ_CONFLIT;
2977 } else if (brd->nports == 8) {
2978 irq = regs[9] & 0xF000;
2979 irq = irq | (irq >> 4);
2980 irq = irq | (irq >> 8);
2981 if ((irq != regs[9]) || (irq != regs[10]))
2982 return MXSER_ERR_IRQ_CONFLIT;
2986 return MXSER_ERR_IRQ;
2987 brd->irq = ((int)(irq & 0xF000) >> 12);
2988 for (i = 0; i < 8; i++)
2989 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2990 if ((regs[12] & 0x80) == 0)
2991 return MXSER_ERR_VECTOR;
2992 brd->vector = (int)regs[11]; /* interrupt vector */
2994 brd->vector_mask = 0x00FF;
2996 brd->vector_mask = 0x000F;
2997 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2998 if (regs[12] & bits) {
2999 brd->ports[i].baud_base = 921600;
3000 brd->ports[i].max_baud = 921600; /* add by Victor Yu. 09-04-2002 */
3002 brd->ports[i].baud_base = 115200;
3003 brd->ports[i].max_baud = 115200; /* add by Victor Yu. 09-04-2002 */
3006 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3007 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3008 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3009 outb(scratch2, cap + UART_LCR);
3010 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3011 scratch = inb(cap + UART_IIR);
3014 brd->uart_type = PORT_16550A;
3016 brd->uart_type = PORT_16450;
3021 if (!request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)"))
3022 return MXSER_ERR_IOADDR;
3023 if (!request_region(brd->vector, 1, "mxser(vector)")) {
3024 release_region(brd->ports[0].ioaddr, 8 * brd->nports);
3025 return MXSER_ERR_VECTOR;
3030 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3031 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3032 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3033 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3034 #define EN_CCMD 0x000 /* Chip's command register */
3035 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3036 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3037 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3038 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3039 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3040 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3041 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3042 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3043 static int mxser_read_register(int port, unsigned short *regs)
3045 int i, k, value, id;
3048 id = mxser_program_mode(port);
3051 for (i = 0; i < 14; i++) {
3052 k = (i & 0x3F) | 0x180;
3053 for (j = 0x100; j > 0; j >>= 1) {
3054 outb(CHIP_CS, port);
3056 outb(CHIP_CS | CHIP_DO, port);
3057 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3059 outb(CHIP_CS, port);
3060 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3065 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3066 outb(CHIP_CS, port);
3067 outb(CHIP_CS | CHIP_SK, port);
3068 if (inb(port) & CHIP_DI)
3074 mxser_normal_mode(port);
3078 static int mxser_program_mode(int port)
3081 /* unsigned long flags; */
3083 spin_lock(&gm_lock);
3091 /* restore_flags(flags); */
3092 spin_unlock(&gm_lock);
3094 id = inb(port + 1) & 0x1F;
3095 if ((id != C168_ASIC_ID) &&
3096 (id != C104_ASIC_ID) &&
3097 (id != C102_ASIC_ID) &&
3098 (id != CI132_ASIC_ID) &&
3099 (id != CI134_ASIC_ID) &&
3100 (id != CI104J_ASIC_ID))
3102 for (i = 0, j = 0; i < 4; i++) {
3106 } else if ((j == 1) && (n == 1)) {
3117 static void mxser_normal_mode(int port)
3121 outb(0xA5, port + 1);
3122 outb(0x80, port + 3);
3123 outb(12, port + 0); /* 9600 bps */
3125 outb(0x03, port + 3); /* 8 data bits */
3126 outb(0x13, port + 4); /* loop back mode */
3127 for (i = 0; i < 16; i++) {
3129 if ((n & 0x61) == 0x60)
3134 outb(0x00, port + 4);
3137 module_init(mxser_module_init);
3138 module_exit(mxser_module_exit);