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;
627 brd->board_type = board_type;
628 brd->nports = mxser_numports[board_type - 1];
629 ioaddress = pci_resource_start(pdev, 2);
630 pci_request_region(pdev, 2, "mxser(IO)");
632 for (i = 0; i < brd->nports; i++)
633 brd->ports[i].ioaddr = ioaddress + 8 * i;
636 ioaddress = pci_resource_start(pdev, 3);
637 pci_request_region(pdev, 3, "mxser(vector)");
638 brd->vector = ioaddress;
641 brd->irq = pdev->irq;
643 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
644 brd->uart_type = PORT_16550A;
645 brd->vector_mask = 0;
647 for (i = 0; i < brd->nports; i++) {
648 for (j = 0; j < UART_INFO_NUM; j++) {
649 if (Gpci_uart_info[j].type == brd->chip_flag) {
650 brd->ports[i].max_baud =
651 Gpci_uart_info[j].max_baud;
653 /* exception....CP-102 */
654 if (board_type == MXSER_BOARD_CP102)
655 brd->ports[i].max_baud = 921600;
661 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
662 for (i = 0; i < brd->nports; i++) {
664 brd->ports[i].opmode_ioaddr = ioaddress + 4;
666 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
668 outb(0, ioaddress + 4); /* default set to RS232 mode */
669 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
672 for (i = 0; i < brd->nports; i++) {
673 brd->vector_mask |= (1 << i);
674 brd->ports[i].baud_base = 921600;
679 static int __init mxser_init(void)
681 struct pci_dev *pdev = NULL;
682 struct mxser_board *brd;
686 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
689 spin_lock_init(&gm_lock);
691 for (i = 0; i < MXSER_BOARDS; i++)
692 mxser_boards[i].board_type = -1;
694 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
697 /* Initialize the tty_driver structure */
698 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
699 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
700 mxvar_sdriver->name = "ttyM";
701 mxvar_sdriver->major = ttymajor;
702 mxvar_sdriver->minor_start = 0;
703 mxvar_sdriver->num = MXSER_PORTS + 1;
704 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
705 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
706 mxvar_sdriver->init_termios = tty_std_termios;
707 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
708 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
709 tty_set_operations(mxvar_sdriver, &mxser_ops);
710 mxvar_sdriver->ttys = mxvar_tty;
711 mxvar_sdriver->termios = mxvar_termios;
712 mxvar_sdriver->termios_locked = mxvar_termios_locked;
715 memset(mxser_boards, 0, sizeof(mxser_boards));
716 memset(&mxvar_log, 0, sizeof(struct mxser_log));
718 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
719 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
720 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
723 /* Start finding ISA boards here */
724 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
727 if (!(cap = mxserBoardCAP[b]))
730 brd = &mxser_boards[m];
731 retval = mxser_get_ISA_conf(cap, brd);
734 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
735 mxser_brdname[brd->board_type - 1], ioaddr[b]);
738 if (retval == MXSER_ERR_IRQ)
739 printk(KERN_ERR "Invalid interrupt number, "
740 "board not configured\n");
741 else if (retval == MXSER_ERR_IRQ_CONFLIT)
742 printk(KERN_ERR "Invalid interrupt number, "
743 "board not configured\n");
744 else if (retval == MXSER_ERR_VECTOR)
745 printk(KERN_ERR "Invalid interrupt vector, "
746 "board not configured\n");
747 else if (retval == MXSER_ERR_IOADDR)
748 printk(KERN_ERR "Invalid I/O address, "
749 "board not configured\n");
756 /* mxser_initbrd will hook ISR. */
757 if (mxser_initbrd(brd) < 0)
763 /* Start finding ISA boards from module arg */
764 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
767 if (!(cap = ioaddr[b]))
770 brd = &mxser_boards[m];
771 retval = mxser_get_ISA_conf(cap, &mxser_boards[m]);
774 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
775 mxser_brdname[brd->board_type - 1], ioaddr[b]);
778 if (retval == MXSER_ERR_IRQ)
779 printk(KERN_ERR "Invalid interrupt number, "
780 "board not configured\n");
781 else if (retval == MXSER_ERR_IRQ_CONFLIT)
782 printk(KERN_ERR "Invalid interrupt number, "
783 "board not configured\n");
784 else if (retval == MXSER_ERR_VECTOR)
785 printk(KERN_ERR "Invalid interrupt vector, "
786 "board not configured\n");
787 else if (retval == MXSER_ERR_IOADDR)
788 printk(KERN_ERR "Invalid I/O address, "
789 "board not configured\n");
795 /* mxser_initbrd will hook ISR. */
796 if (mxser_initbrd(brd) < 0)
802 /* start finding PCI board here */
803 n = ARRAY_SIZE(mxser_pcibrds) - 1;
806 pdev = pci_get_device(mxser_pcibrds[b].vendor,
807 mxser_pcibrds[b].device, pdev);
812 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
813 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
814 pdev->bus->number, PCI_SLOT(pdev->devfn));
815 if (m >= MXSER_BOARDS)
817 "Too many Smartio/Industio family boards find "
818 "(maximum %d), board not configured\n",
821 if (pci_enable_device(pdev)) {
822 printk(KERN_ERR "Moxa SmartI/O PCI enable "
826 brd = &mxser_boards[m];
828 retval = mxser_get_PCI_conf(
829 (int)mxser_pcibrds[b].driver_data,
832 if (retval == MXSER_ERR_IRQ)
834 "Invalid interrupt number, "
835 "board not configured\n");
836 else if (retval == MXSER_ERR_IRQ_CONFLIT)
838 "Invalid interrupt number, "
839 "board not configured\n");
840 else if (retval == MXSER_ERR_VECTOR)
842 "Invalid interrupt vector, "
843 "board not configured\n");
844 else if (retval == MXSER_ERR_IOADDR)
846 "Invalid I/O address, "
847 "board not configured\n");
850 /* mxser_initbrd will hook ISR. */
851 if (mxser_initbrd(brd) < 0)
854 /* Keep an extra reference if we succeeded. It will
855 be returned at unload time */
860 retval = tty_register_driver(mxvar_sdriver);
862 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
864 put_tty_driver(mxvar_sdriver);
866 for (i = 0; i < MXSER_BOARDS; i++) {
867 if (mxser_boards[i].board_type == -1)
870 free_irq(mxser_boards[i].irq, &mxser_boards[i]);
871 /* todo: release io, vector */
880 static void mxser_do_softint(void *private_)
882 struct mxser_port *info = private_;
883 struct tty_struct *tty;
887 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
889 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
893 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
895 unsigned char status = 0;
897 status = inb(baseaddr + UART_MSR);
899 mxser_msr[port] &= 0x0F;
900 mxser_msr[port] |= status;
901 status = mxser_msr[port];
909 * This routine is called whenever a serial port is opened. It
910 * enables interrupts for a serial port, linking in its async structure into
911 * the IRQ chain. It also performs the serial-specific
912 * initialization for the tty structure.
914 static int mxser_open(struct tty_struct *tty, struct file *filp)
916 struct mxser_port *info;
919 /* initialize driver_data in case something fails */
920 tty->driver_data = NULL;
923 if (line == MXSER_PORTS)
925 if (line < 0 || line > MXSER_PORTS)
927 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
931 tty->driver_data = info;
934 * Start up serial port
937 retval = mxser_startup(info);
941 retval = mxser_block_til_ready(tty, filp, info);
945 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
946 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
947 *tty->termios = info->normal_termios;
949 *tty->termios = info->callout_termios;
950 mxser_change_speed(info, NULL);
953 info->session = process_session(current);
954 info->pgrp = process_group(current);
957 status = mxser_get_msr(info->base, 0, info->port);
958 mxser_check_modem_status(info, status);
961 /* unmark here for very high baud rate (ex. 921600 bps) used */
962 tty->low_latency = 1;
967 * This routine is called when the serial port gets closed. First, we
968 * wait for the last remaining data to be sent. Then, we unlink its
969 * async structure from the interrupt chain if necessary, and we free
970 * that IRQ if nothing is left in the chain.
972 static void mxser_close(struct tty_struct *tty, struct file *filp)
974 struct mxser_port *info = tty->driver_data;
976 unsigned long timeout;
978 struct tty_ldisc *ld;
980 if (tty->index == MXSER_PORTS)
985 spin_lock_irqsave(&info->slock, flags);
987 if (tty_hung_up_p(filp)) {
988 spin_unlock_irqrestore(&info->slock, flags);
991 if ((tty->count == 1) && (info->count != 1)) {
993 * Uh, oh. tty->count is 1, which means that the tty
994 * structure will be freed. Info->count should always
995 * be one in these conditions. If it's greater than
996 * one, we've got real problems, since it means the
997 * serial port won't be shutdown.
999 printk(KERN_ERR "mxser_close: bad serial port count; "
1000 "tty->count is 1, info->count is %d\n", info->count);
1003 if (--info->count < 0) {
1004 printk(KERN_ERR "mxser_close: bad serial port count for "
1005 "ttys%d: %d\n", tty->index, info->count);
1009 spin_unlock_irqrestore(&info->slock, flags);
1012 info->flags |= ASYNC_CLOSING;
1013 spin_unlock_irqrestore(&info->slock, flags);
1015 * Save the termios structure, since this port may have
1016 * separate termios for callout and dialin.
1018 if (info->flags & ASYNC_NORMAL_ACTIVE)
1019 info->normal_termios = *tty->termios;
1021 * Now we wait for the transmit buffer to clear; and we notify
1022 * the line discipline to only process XON/XOFF characters.
1025 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1026 tty_wait_until_sent(tty, info->closing_wait);
1028 * At this point we stop accepting input. To do this, we
1029 * disable the receive line status interrupts, and tell the
1030 * interrupt driver to stop checking the data ready bit in the
1031 * line status register.
1033 info->IER &= ~UART_IER_RLSI;
1034 if (info->board->chip_flag)
1035 info->IER &= ~MOXA_MUST_RECV_ISR;
1037 info->read_status_mask &= ~UART_LSR_DR;
1039 if (info->flags & ASYNC_INITIALIZED) {
1040 outb(info->IER, info->ioaddr + UART_IER);
1042 * Before we drop DTR, make sure the UART transmitter
1043 * has completely drained; this is especially
1044 * important if there is a transmit FIFO!
1046 timeout = jiffies + HZ;
1047 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1048 schedule_timeout_interruptible(5);
1049 if (time_after(jiffies, timeout))
1053 mxser_shutdown(info);
1055 if (tty->driver->flush_buffer)
1056 tty->driver->flush_buffer(tty);
1058 ld = tty_ldisc_ref(tty);
1060 if (ld->flush_buffer)
1061 ld->flush_buffer(tty);
1062 tty_ldisc_deref(ld);
1068 if (info->blocked_open) {
1069 if (info->close_delay)
1070 schedule_timeout_interruptible(info->close_delay);
1071 wake_up_interruptible(&info->open_wait);
1074 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1075 wake_up_interruptible(&info->close_wait);
1079 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1082 struct mxser_port *info = tty->driver_data;
1083 unsigned long flags;
1085 if (!info->xmit_buf)
1089 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1090 SERIAL_XMIT_SIZE - info->xmit_head));
1094 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1095 spin_lock_irqsave(&info->slock, flags);
1096 info->xmit_head = (info->xmit_head + c) &
1097 (SERIAL_XMIT_SIZE - 1);
1098 info->xmit_cnt += c;
1099 spin_unlock_irqrestore(&info->slock, flags);
1106 if (info->xmit_cnt && !tty->stopped
1107 /*&& !(info->IER & UART_IER_THRI)*/) {
1108 if (!tty->hw_stopped ||
1109 (info->type == PORT_16550A) ||
1110 (info->board->chip_flag)) {
1111 spin_lock_irqsave(&info->slock, flags);
1112 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1114 info->IER |= UART_IER_THRI;
1115 outb(info->IER, info->ioaddr + UART_IER);
1116 spin_unlock_irqrestore(&info->slock, flags);
1122 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1124 struct mxser_port *info = tty->driver_data;
1125 unsigned long flags;
1127 if (!info->xmit_buf)
1130 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1133 spin_lock_irqsave(&info->slock, flags);
1134 info->xmit_buf[info->xmit_head++] = ch;
1135 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1137 spin_unlock_irqrestore(&info->slock, flags);
1138 if (!tty->stopped /*&& !(info->IER & UART_IER_THRI)*/) {
1139 if (!tty->hw_stopped ||
1140 (info->type == PORT_16550A) ||
1141 info->board->chip_flag) {
1142 spin_lock_irqsave(&info->slock, flags);
1143 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1144 info->IER |= UART_IER_THRI;
1145 outb(info->IER, info->ioaddr + UART_IER);
1146 spin_unlock_irqrestore(&info->slock, flags);
1152 static void mxser_flush_chars(struct tty_struct *tty)
1154 struct mxser_port *info = tty->driver_data;
1155 unsigned long flags;
1157 if (info->xmit_cnt <= 0 ||
1161 (info->type != PORT_16550A) &&
1162 (!info->board->chip_flag)
1166 spin_lock_irqsave(&info->slock, flags);
1168 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1169 info->IER |= UART_IER_THRI;
1170 outb(info->IER, info->ioaddr + UART_IER);
1172 spin_unlock_irqrestore(&info->slock, flags);
1175 static int mxser_write_room(struct tty_struct *tty)
1177 struct mxser_port *info = tty->driver_data;
1180 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1186 static int mxser_chars_in_buffer(struct tty_struct *tty)
1188 struct mxser_port *info = tty->driver_data;
1189 int len = info->xmit_cnt;
1191 if (!(inb(info->ioaddr + UART_LSR) & UART_LSR_THRE))
1197 static void mxser_flush_buffer(struct tty_struct *tty)
1199 struct mxser_port *info = tty->driver_data;
1201 unsigned long flags;
1204 spin_lock_irqsave(&info->slock, flags);
1205 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1207 /* below added by shinhay */
1208 fcr = inb(info->ioaddr + UART_FCR);
1209 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1210 info->ioaddr + UART_FCR);
1211 outb(fcr, info->ioaddr + UART_FCR);
1213 spin_unlock_irqrestore(&info->slock, flags);
1214 /* above added by shinhay */
1216 wake_up_interruptible(&tty->write_wait);
1217 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1218 (tty->ldisc.write_wakeup) (tty);
1221 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1223 struct mxser_port *info = tty->driver_data;
1225 struct async_icount cprev, cnow; /* kernel counter temps */
1226 struct serial_icounter_struct __user *p_cuser;
1227 unsigned long templ;
1228 unsigned long flags;
1229 void __user *argp = (void __user *)arg;
1231 if (tty->index == MXSER_PORTS)
1232 return mxser_ioctl_special(cmd, argp);
1234 /* following add by Victor Yu. 01-05-2004 */
1235 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1237 unsigned long opmode;
1238 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1240 unsigned char val, mask;
1243 if (cmd == MOXA_SET_OP_MODE) {
1244 if (get_user(opmode, (int __user *) argp))
1246 if (opmode != RS232_MODE &&
1247 opmode != RS485_2WIRE_MODE &&
1248 opmode != RS422_MODE &&
1249 opmode != RS485_4WIRE_MODE)
1253 val = inb(info->opmode_ioaddr);
1255 val |= (opmode << shiftbit);
1256 outb(val, info->opmode_ioaddr);
1259 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1260 opmode &= OP_MODE_MASK;
1261 if (copy_to_user(argp, &opmode, sizeof(int)))
1266 /* above add by Victor Yu. 01-05-2004 */
1268 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1269 if (tty->flags & (1 << TTY_IO_ERROR))
1273 case TCSBRK: /* SVID version: non-zero arg --> no break */
1274 retval = tty_check_change(tty);
1277 tty_wait_until_sent(tty, 0);
1279 mxser_send_break(info, HZ / 4); /* 1/4 second */
1281 case TCSBRKP: /* support for POSIX tcsendbreak() */
1282 retval = tty_check_change(tty);
1285 tty_wait_until_sent(tty, 0);
1286 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1289 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1291 if (get_user(templ, (unsigned long __user *) argp))
1294 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1297 return mxser_get_serial_info(info, argp);
1299 return mxser_set_serial_info(info, argp);
1300 case TIOCSERGETLSR: /* Get line status register */
1301 return mxser_get_lsr_info(info, argp);
1303 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1304 * - mask passed in arg for lines of interest
1305 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1306 * Caller should use TIOCGICOUNT to see which one it was
1309 DECLARE_WAITQUEUE(wait, current);
1311 spin_lock_irqsave(&info->slock, flags);
1312 cprev = info->icount; /* note the counters on entry */
1313 spin_unlock_irqrestore(&info->slock, flags);
1315 add_wait_queue(&info->delta_msr_wait, &wait);
1317 spin_lock_irqsave(&info->slock, flags);
1318 cnow = info->icount; /* atomic copy */
1319 spin_unlock_irqrestore(&info->slock, flags);
1321 set_current_state(TASK_INTERRUPTIBLE);
1322 if (((arg & TIOCM_RNG) &&
1323 (cnow.rng != cprev.rng)) ||
1324 ((arg & TIOCM_DSR) &&
1325 (cnow.dsr != cprev.dsr)) ||
1326 ((arg & TIOCM_CD) &&
1327 (cnow.dcd != cprev.dcd)) ||
1328 ((arg & TIOCM_CTS) &&
1329 (cnow.cts != cprev.cts))) {
1333 /* see if a signal did it */
1334 if (signal_pending(current)) {
1340 current->state = TASK_RUNNING;
1341 remove_wait_queue(&info->delta_msr_wait, &wait);
1346 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1347 * Return: write counters to the user passed counter struct
1348 * NB: both 1->0 and 0->1 transitions are counted except for
1349 * RI where only 0->1 is counted.
1352 spin_lock_irqsave(&info->slock, flags);
1353 cnow = info->icount;
1354 spin_unlock_irqrestore(&info->slock, flags);
1356 /* modified by casper 1/11/2000 */
1357 if (put_user(cnow.frame, &p_cuser->frame))
1359 if (put_user(cnow.brk, &p_cuser->brk))
1361 if (put_user(cnow.overrun, &p_cuser->overrun))
1363 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1365 if (put_user(cnow.parity, &p_cuser->parity))
1367 if (put_user(cnow.rx, &p_cuser->rx))
1369 if (put_user(cnow.tx, &p_cuser->tx))
1371 put_user(cnow.cts, &p_cuser->cts);
1372 put_user(cnow.dsr, &p_cuser->dsr);
1373 put_user(cnow.rng, &p_cuser->rng);
1374 put_user(cnow.dcd, &p_cuser->dcd);
1376 case MOXA_HighSpeedOn:
1377 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1378 case MOXA_SDS_RSTICOUNTER: {
1379 info->mon_data.rxcnt = 0;
1380 info->mon_data.txcnt = 0;
1383 /* (above) added by James. */
1384 case MOXA_ASPP_SETBAUD:{
1386 if (get_user(baud, (long __user *)argp))
1388 mxser_set_baud(info, baud);
1391 case MOXA_ASPP_GETBAUD:
1392 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1397 case MOXA_ASPP_OQUEUE:{
1400 len = mxser_chars_in_buffer(tty);
1402 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1404 len += (lsr ? 0 : 1);
1406 if (copy_to_user(argp, &len, sizeof(int)))
1411 case MOXA_ASPP_MON: {
1414 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1416 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1417 mxser_check_modem_status(info, status);
1419 mcr = inb(info->ioaddr + UART_MCR);
1420 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1421 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1423 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1425 if (mcr & MOXA_MUST_MCR_TX_XON)
1426 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1428 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1430 if (info->tty->hw_stopped)
1431 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1433 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1435 if (copy_to_user(argp, &info->mon_data,
1436 sizeof(struct mxser_mon)))
1442 case MOXA_ASPP_LSTATUS: {
1443 if (copy_to_user(argp, &info->err_shadow,
1444 sizeof(unsigned char)))
1447 info->err_shadow = 0;
1450 case MOXA_SET_BAUD_METHOD: {
1453 if (get_user(method, (int __user *)argp))
1455 mxser_set_baud_method[tty->index] = method;
1456 if (copy_to_user(argp, &method, sizeof(int)))
1462 return -ENOIOCTLCMD;
1468 #define CMSPAR 010000000000
1471 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1473 struct mxser_port *port;
1479 /* if (copy_to_user(argp, mxsercfg,
1480 sizeof(struct mxser_hwconf) * 4))
1484 case MOXA_GET_MAJOR:
1485 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1489 case MOXA_GET_CUMAJOR:
1490 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1494 case MOXA_CHKPORTENABLE:
1497 for (i = 0; i < MXSER_BOARDS; i++)
1498 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1499 if (mxser_boards[i].ports[j].ioaddr)
1502 return put_user(result, (unsigned long __user *)argp);
1503 case MOXA_GETDATACOUNT:
1504 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1507 case MOXA_GETMSTATUS:
1508 for (i = 0; i < MXSER_BOARDS; i++)
1509 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1510 port = &mxser_boards[i].ports[j];
1513 if (!port->ioaddr) {
1514 GMStatus[i].dcd = 0;
1515 GMStatus[i].dsr = 0;
1516 GMStatus[i].cts = 0;
1520 if (!port->tty || !port->tty->termios)
1522 port->normal_termios.c_cflag;
1525 port->tty->termios->c_cflag;
1527 status = inb(port->ioaddr + UART_MSR);
1528 if (status & 0x80 /*UART_MSR_DCD */ )
1529 GMStatus[i].dcd = 1;
1531 GMStatus[i].dcd = 0;
1533 if (status & 0x20 /*UART_MSR_DSR */ )
1534 GMStatus[i].dsr = 1;
1536 GMStatus[i].dsr = 0;
1539 if (status & 0x10 /*UART_MSR_CTS */ )
1540 GMStatus[i].cts = 1;
1542 GMStatus[i].cts = 0;
1544 if (copy_to_user(argp, GMStatus,
1545 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1548 case MOXA_ASPP_MON_EXT: {
1549 int status, p, shiftbit;
1550 unsigned long opmode;
1551 unsigned cflag, iflag;
1553 for (i = 0; i < MXSER_BOARDS; i++)
1554 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1555 port = &mxser_boards[i].ports[j];
1559 status = mxser_get_msr(port->ioaddr, 0, i);
1560 /* mxser_check_modem_status(port, status); */
1562 if (status & UART_MSR_TERI)
1564 if (status & UART_MSR_DDSR)
1566 if (status & UART_MSR_DDCD)
1568 if (status & UART_MSR_DCTS)
1571 port->mon_data.modem_status = status;
1572 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1573 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1574 mon_data_ext.up_rxcnt[i] =
1575 port->mon_data.up_rxcnt;
1576 mon_data_ext.up_txcnt[i] =
1577 port->mon_data.up_txcnt;
1578 mon_data_ext.modem_status[i] =
1579 port->mon_data.modem_status;
1580 mon_data_ext.baudrate[i] = port->realbaud;
1582 if (!port->tty || !port->tty->termios) {
1583 cflag = port->normal_termios.c_cflag;
1584 iflag = port->normal_termios.c_iflag;
1586 cflag = port->tty->termios->c_cflag;
1587 iflag = port->tty->termios->c_iflag;
1590 mon_data_ext.databits[i] = cflag & CSIZE;
1592 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1594 mon_data_ext.parity[i] =
1595 cflag & (PARENB | PARODD | CMSPAR);
1597 mon_data_ext.flowctrl[i] = 0x00;
1599 if (cflag & CRTSCTS)
1600 mon_data_ext.flowctrl[i] |= 0x03;
1602 if (iflag & (IXON | IXOFF))
1603 mon_data_ext.flowctrl[i] |= 0x0C;
1605 if (port->type == PORT_16550A)
1606 mon_data_ext.fifo[i] = 1;
1608 mon_data_ext.fifo[i] = 0;
1612 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1613 opmode &= OP_MODE_MASK;
1615 mon_data_ext.iftype[i] = opmode;
1618 if (copy_to_user(argp, &mon_data_ext,
1619 sizeof(mon_data_ext)))
1625 return -ENOIOCTLCMD;
1630 static void mxser_stoprx(struct tty_struct *tty)
1632 struct mxser_port *info = tty->driver_data;
1634 info->ldisc_stop_rx = 1;
1636 /* following add by Victor Yu. 09-02-2002 */
1637 if (info->board->chip_flag) {
1638 info->IER &= ~MOXA_MUST_RECV_ISR;
1639 outb(info->IER, info->ioaddr + UART_IER);
1640 } else if (!(info->flags & ASYNC_CLOSING)) {
1641 info->x_char = STOP_CHAR(tty);
1642 outb(0, info->ioaddr + UART_IER);
1643 info->IER |= UART_IER_THRI;
1644 outb(info->IER, info->ioaddr + UART_IER);
1648 if (info->tty->termios->c_cflag & CRTSCTS) {
1649 info->MCR &= ~UART_MCR_RTS;
1650 outb(info->MCR, info->ioaddr + UART_MCR);
1654 static void mxser_startrx(struct tty_struct *tty)
1656 struct mxser_port *info = tty->driver_data;
1658 info->ldisc_stop_rx = 0;
1663 /* following add by Victor Yu. 09-02-2002 */
1664 if (info->board->chip_flag) {
1665 info->IER |= MOXA_MUST_RECV_ISR;
1666 outb(info->IER, info->ioaddr + UART_IER);
1667 } else if (!(info->flags & ASYNC_CLOSING)) {
1668 info->x_char = START_CHAR(tty);
1669 outb(0, info->ioaddr + UART_IER);
1670 info->IER |= UART_IER_THRI;
1671 outb(info->IER, info->ioaddr + UART_IER);
1676 if (info->tty->termios->c_cflag & CRTSCTS) {
1677 info->MCR |= UART_MCR_RTS;
1678 outb(info->MCR, info->ioaddr + UART_MCR);
1683 * This routine is called by the upper-layer tty layer to signal that
1684 * incoming characters should be throttled.
1686 static void mxser_throttle(struct tty_struct *tty)
1688 struct mxser_port *info = tty->driver_data;
1689 unsigned long flags;
1691 spin_lock_irqsave(&info->slock, flags);
1693 spin_unlock_irqrestore(&info->slock, flags);
1696 static void mxser_unthrottle(struct tty_struct *tty)
1698 struct mxser_port *info = tty->driver_data;
1699 unsigned long flags;
1701 spin_lock_irqsave(&info->slock, flags);
1703 spin_unlock_irqrestore(&info->slock, flags);
1706 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1708 struct mxser_port *info = tty->driver_data;
1709 unsigned long flags;
1711 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1712 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1714 mxser_change_speed(info, old_termios);
1716 if ((old_termios->c_cflag & CRTSCTS) &&
1717 !(tty->termios->c_cflag & CRTSCTS)) {
1718 tty->hw_stopped = 0;
1723 /* Handle sw stopped */
1724 if ((old_termios->c_iflag & IXON) &&
1725 !(tty->termios->c_iflag & IXON)) {
1728 /* following add by Victor Yu. 09-02-2002 */
1729 if (info->board->chip_flag) {
1730 spin_lock_irqsave(&info->slock, flags);
1731 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1732 spin_unlock_irqrestore(&info->slock, flags);
1734 /* above add by Victor Yu. 09-02-2002 */
1741 * mxser_stop() and mxser_start()
1743 * This routines are called before setting or resetting tty->stopped.
1744 * They enable or disable transmitter interrupts, as necessary.
1746 static void mxser_stop(struct tty_struct *tty)
1748 struct mxser_port *info = tty->driver_data;
1749 unsigned long flags;
1751 spin_lock_irqsave(&info->slock, flags);
1752 if (info->IER & UART_IER_THRI) {
1753 info->IER &= ~UART_IER_THRI;
1754 outb(info->IER, info->ioaddr + UART_IER);
1756 spin_unlock_irqrestore(&info->slock, flags);
1759 static void mxser_start(struct tty_struct *tty)
1761 struct mxser_port *info = tty->driver_data;
1762 unsigned long flags;
1764 spin_lock_irqsave(&info->slock, flags);
1765 if (info->xmit_cnt && info->xmit_buf
1766 /* && !(info->IER & UART_IER_THRI) */) {
1767 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1768 info->IER |= UART_IER_THRI;
1769 outb(info->IER, info->ioaddr + UART_IER);
1771 spin_unlock_irqrestore(&info->slock, flags);
1775 * mxser_wait_until_sent() --- wait until the transmitter is empty
1777 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1779 struct mxser_port *info = tty->driver_data;
1780 unsigned long orig_jiffies, char_time;
1783 if (info->type == PORT_UNKNOWN)
1786 if (info->xmit_fifo_size == 0)
1787 return; /* Just in case.... */
1789 orig_jiffies = jiffies;
1791 * Set the check interval to be 1/5 of the estimated time to
1792 * send a single character, and make it at least 1. The check
1793 * interval should also be less than the timeout.
1795 * Note: we have to use pretty tight timings here to satisfy
1798 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1799 char_time = char_time / 5;
1802 if (timeout && timeout < char_time)
1803 char_time = timeout;
1805 * If the transmitter hasn't cleared in twice the approximate
1806 * amount of time to send the entire FIFO, it probably won't
1807 * ever clear. This assumes the UART isn't doing flow
1808 * control, which is currently the case. Hence, if it ever
1809 * takes longer than info->timeout, this is probably due to a
1810 * UART bug of some kind. So, we clamp the timeout parameter at
1813 if (!timeout || timeout > 2 * info->timeout)
1814 timeout = 2 * info->timeout;
1815 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1816 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1817 timeout, char_time);
1818 printk("jiff=%lu...", jiffies);
1820 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1821 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1822 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1824 schedule_timeout_interruptible(char_time);
1825 if (signal_pending(current))
1827 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1830 set_current_state(TASK_RUNNING);
1832 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1833 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1839 * This routine is called by tty_hangup() when a hangup is signaled.
1841 void mxser_hangup(struct tty_struct *tty)
1843 struct mxser_port *info = tty->driver_data;
1845 mxser_flush_buffer(tty);
1846 mxser_shutdown(info);
1849 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1851 wake_up_interruptible(&info->open_wait);
1855 /* added by James 03-12-2004. */
1857 * mxser_rs_break() --- routine which turns the break handling on or off
1859 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1861 struct mxser_port *info = tty->driver_data;
1862 unsigned long flags;
1864 spin_lock_irqsave(&info->slock, flags);
1865 if (break_state == -1)
1866 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1867 info->ioaddr + UART_LCR);
1869 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1870 info->ioaddr + UART_LCR);
1871 spin_unlock_irqrestore(&info->slock, flags);
1874 /* (above) added by James. */
1878 * This is the serial driver's generic interrupt routine
1880 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1883 struct mxser_board *brd = NULL;
1884 struct mxser_port *port;
1885 int max, irqbits, bits, msr;
1886 int pass_counter = 0;
1887 unsigned int int_cnt;
1888 int handled = IRQ_NONE;
1890 /* spin_lock(&gm_lock); */
1892 for (i = 0; i < MXSER_BOARDS; i++)
1893 if (dev_id == &mxser_boards[i]) {
1898 if (i == MXSER_BOARDS)
1902 max = mxser_numports[brd->board_type - 1];
1904 irqbits = inb(brd->vector) & brd->vector_mask;
1905 if (irqbits == brd->vector_mask)
1908 handled = IRQ_HANDLED;
1909 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1910 if (irqbits == brd->vector_mask)
1914 port = &brd->ports[i];
1918 /* following add by Victor Yu. 09-13-2002 */
1919 iir = inb(port->ioaddr + UART_IIR);
1920 if (iir & UART_IIR_NO_INT)
1922 iir &= MOXA_MUST_IIR_MASK;
1924 status = inb(port->ioaddr + UART_LSR);
1925 outb(0x27, port->ioaddr + UART_FCR);
1926 inb(port->ioaddr + UART_MSR);
1929 /* above add by Victor Yu. 09-13-2002 */
1931 spin_lock(&port->slock);
1932 /* following add by Victor Yu. 09-02-2002 */
1933 status = inb(port->ioaddr + UART_LSR);
1935 if (status & UART_LSR_PE)
1936 port->err_shadow |= NPPI_NOTIFY_PARITY;
1937 if (status & UART_LSR_FE)
1938 port->err_shadow |= NPPI_NOTIFY_FRAMING;
1939 if (status & UART_LSR_OE)
1941 NPPI_NOTIFY_HW_OVERRUN;
1942 if (status & UART_LSR_BI)
1943 port->err_shadow |= NPPI_NOTIFY_BREAK;
1945 if (port->board->chip_flag) {
1947 if ( (status & 0x02) && !(status & 0x01) ) {
1948 outb(port->ioaddr+UART_FCR, 0x23);
1952 if (iir == MOXA_MUST_IIR_GDA ||
1953 iir == MOXA_MUST_IIR_RDA ||
1954 iir == MOXA_MUST_IIR_RTO ||
1955 iir == MOXA_MUST_IIR_LSR)
1956 mxser_receive_chars(port,
1960 /* above add by Victor Yu. 09-02-2002 */
1962 status &= port->read_status_mask;
1963 if (status & UART_LSR_DR)
1964 mxser_receive_chars(port,
1967 msr = inb(port->ioaddr + UART_MSR);
1968 if (msr & UART_MSR_ANY_DELTA)
1969 mxser_check_modem_status(port, msr);
1971 /* following add by Victor Yu. 09-13-2002 */
1972 if (port->board->chip_flag) {
1973 if (iir == 0x02 && (status &
1975 mxser_transmit_chars(port);
1977 /* above add by Victor Yu. 09-13-2002 */
1979 if (status & UART_LSR_THRE)
1980 mxser_transmit_chars(port);
1982 spin_unlock(&port->slock);
1983 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
1985 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
1986 break; /* Prevent infinite loops */
1990 /* spin_unlock(&gm_lock); */
1994 static void mxser_receive_chars(struct mxser_port *port, int *status)
1996 struct tty_struct *tty = port->tty;
1997 unsigned char ch, gdl;
2002 unsigned long flags;
2004 spin_lock_irqsave(&port->slock, flags);
2006 recv_room = tty->receive_room;
2007 if ((recv_room == 0) && (!port->ldisc_stop_rx)) {
2008 /* mxser_throttle(tty); */
2013 /* following add by Victor Yu. 09-02-2002 */
2014 if (port->board->chip_flag != MOXA_OTHER_UART) {
2016 if (*status & UART_LSR_SPECIAL)
2018 /* following add by Victor Yu. 02-11-2004 */
2019 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2020 (*status & MOXA_MUST_LSR_RERR))
2022 /* above add by Victor Yu. 02-14-2004 */
2023 if (*status & MOXA_MUST_LSR_RERR)
2026 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2028 /* add by Victor Yu. 02-11-2004 */
2029 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2030 gdl &= MOXA_MUST_GDL_MASK;
2031 if (gdl >= recv_room) {
2032 if (!port->ldisc_stop_rx) {
2033 /* mxser_throttle(tty); */
2039 ch = inb(port->ioaddr + UART_RX);
2040 tty_insert_flip_char(tty, ch, 0);
2046 /* above add by Victor Yu. 09-02-2002 */
2052 ch = inb(port->ioaddr + UART_RX);
2053 /* following add by Victor Yu. 09-02-2002 */
2054 if (port->board->chip_flag && (*status & UART_LSR_OE)
2055 /*&& !(*status&UART_LSR_DR) */)
2056 outb(0x23, port->ioaddr + UART_FCR);
2057 *status &= port->read_status_mask;
2058 /* above add by Victor Yu. 09-02-2002 */
2059 if (*status & port->ignore_status_mask) {
2060 if (++ignored > 100)
2064 if (*status & UART_LSR_SPECIAL) {
2065 if (*status & UART_LSR_BI) {
2067 /* added by casper 1/11/2000 */
2070 if (port->flags & ASYNC_SAK)
2072 } else if (*status & UART_LSR_PE) {
2074 /* added by casper 1/11/2000 */
2075 port->icount.parity++;
2076 } else if (*status & UART_LSR_FE) {
2078 /* added by casper 1/11/2000 */
2079 port->icount.frame++;
2080 } else if (*status & UART_LSR_OE) {
2082 /* added by casper 1/11/2000 */
2083 port->icount.overrun++;
2088 tty_insert_flip_char(tty, ch, flag);
2090 if (cnt >= recv_room) {
2091 if (!port->ldisc_stop_rx) {
2092 /* mxser_throttle(tty); */
2100 /* following add by Victor Yu. 09-02-2002 */
2101 if (port->board->chip_flag)
2104 /* mask by Victor Yu. 09-02-2002
2105 *status = inb(port->ioaddr + UART_LSR) & port->read_status_mask;
2107 /* following add by Victor Yu. 09-02-2002 */
2108 *status = inb(port->ioaddr + UART_LSR);
2109 /* above add by Victor Yu. 09-02-2002 */
2110 } while (*status & UART_LSR_DR);
2112 end_intr: /* add by Victor Yu. 09-02-2002 */
2113 mxvar_log.rxcnt[port->tty->index] += cnt;
2114 port->mon_data.rxcnt += cnt;
2115 port->mon_data.up_rxcnt += cnt;
2116 spin_unlock_irqrestore(&port->slock, flags);
2118 tty_flip_buffer_push(tty);
2121 static void mxser_transmit_chars(struct mxser_port *port)
2124 unsigned long flags;
2126 spin_lock_irqsave(&port->slock, flags);
2129 outb(port->x_char, port->ioaddr + UART_TX);
2131 mxvar_log.txcnt[port->tty->index]++;
2132 port->mon_data.txcnt++;
2133 port->mon_data.up_txcnt++;
2135 /* added by casper 1/11/2000 */
2140 if (port->xmit_buf == 0)
2143 if (port->xmit_cnt == 0) {
2144 if (port->xmit_cnt < WAKEUP_CHARS) { /* XXX what's this for?? */
2145 set_bit(MXSER_EVENT_TXLOW, &port->event);
2146 schedule_work(&port->tqueue);
2150 if (port->tty->stopped || (port->tty->hw_stopped &&
2151 (port->type != PORT_16550A) &&
2152 (!port->board->chip_flag))) {
2153 port->IER &= ~UART_IER_THRI;
2154 outb(port->IER, port->ioaddr + UART_IER);
2158 cnt = port->xmit_cnt;
2159 count = port->xmit_fifo_size;
2161 outb(port->xmit_buf[port->xmit_tail++],
2162 port->ioaddr + UART_TX);
2163 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2164 if (--port->xmit_cnt <= 0)
2166 } while (--count > 0);
2167 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2169 /* added by James 03-12-2004. */
2170 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2171 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2173 /* added by casper 1/11/2000 */
2174 port->icount.tx += (cnt - port->xmit_cnt);
2176 if (port->xmit_cnt < WAKEUP_CHARS) {
2177 set_bit(MXSER_EVENT_TXLOW, &port->event);
2178 schedule_work(&port->tqueue);
2180 if (port->xmit_cnt <= 0) {
2181 port->IER &= ~UART_IER_THRI;
2182 outb(port->IER, port->ioaddr + UART_IER);
2185 spin_unlock_irqrestore(&port->slock, flags);
2188 static void mxser_check_modem_status(struct mxser_port *port, int status)
2190 /* update input line counters */
2191 if (status & UART_MSR_TERI)
2193 if (status & UART_MSR_DDSR)
2195 if (status & UART_MSR_DDCD)
2197 if (status & UART_MSR_DCTS)
2199 port->mon_data.modem_status = status;
2200 wake_up_interruptible(&port->delta_msr_wait);
2202 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2203 if (status & UART_MSR_DCD)
2204 wake_up_interruptible(&port->open_wait);
2205 schedule_work(&port->tqueue);
2208 if (port->flags & ASYNC_CTS_FLOW) {
2209 if (port->tty->hw_stopped) {
2210 if (status & UART_MSR_CTS) {
2211 port->tty->hw_stopped = 0;
2213 if ((port->type != PORT_16550A) &&
2214 (!port->board->chip_flag)) {
2215 outb(port->IER & ~UART_IER_THRI,
2216 port->ioaddr + UART_IER);
2217 port->IER |= UART_IER_THRI;
2218 outb(port->IER, port->ioaddr +
2221 set_bit(MXSER_EVENT_TXLOW, &port->event);
2222 schedule_work(&port->tqueue);
2225 if (!(status & UART_MSR_CTS)) {
2226 port->tty->hw_stopped = 1;
2227 if (port->type != PORT_16550A &&
2228 !port->board->chip_flag) {
2229 port->IER &= ~UART_IER_THRI;
2230 outb(port->IER, port->ioaddr +
2238 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_port *port)
2240 DECLARE_WAITQUEUE(wait, current);
2243 unsigned long flags;
2246 * If non-blocking mode is set, or the port is not enabled,
2247 * then make the check up front and then exit.
2249 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2250 port->flags |= ASYNC_NORMAL_ACTIVE;
2254 if (tty->termios->c_cflag & CLOCAL)
2258 * Block waiting for the carrier detect and the line to become
2259 * free (i.e., not in use by the callout). While we are in
2260 * this loop, port->count is dropped by one, so that
2261 * mxser_close() knows when to free things. We restore it upon
2262 * exit, either normal or abnormal.
2265 add_wait_queue(&port->open_wait, &wait);
2267 spin_lock_irqsave(&port->slock, flags);
2268 if (!tty_hung_up_p(filp))
2270 spin_unlock_irqrestore(&port->slock, flags);
2271 port->blocked_open++;
2273 spin_lock_irqsave(&port->slock, flags);
2274 outb(inb(port->ioaddr + UART_MCR) |
2275 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
2276 spin_unlock_irqrestore(&port->slock, flags);
2277 set_current_state(TASK_INTERRUPTIBLE);
2278 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
2279 if (port->flags & ASYNC_HUP_NOTIFY)
2282 retval = -ERESTARTSYS;
2285 if (!(port->flags & ASYNC_CLOSING) &&
2287 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
2289 if (signal_pending(current)) {
2290 retval = -ERESTARTSYS;
2295 set_current_state(TASK_RUNNING);
2296 remove_wait_queue(&port->open_wait, &wait);
2297 if (!tty_hung_up_p(filp))
2299 port->blocked_open--;
2302 port->flags |= ASYNC_NORMAL_ACTIVE;
2306 static int mxser_startup(struct mxser_port *info)
2309 unsigned long flags;
2311 page = __get_free_page(GFP_KERNEL);
2315 spin_lock_irqsave(&info->slock, flags);
2317 if (info->flags & ASYNC_INITIALIZED) {
2319 spin_unlock_irqrestore(&info->slock, flags);
2323 if (!info->ioaddr || !info->type) {
2325 set_bit(TTY_IO_ERROR, &info->tty->flags);
2327 spin_unlock_irqrestore(&info->slock, flags);
2333 info->xmit_buf = (unsigned char *) page;
2336 * Clear the FIFO buffers and disable them
2337 * (they will be reenabled in mxser_change_speed())
2339 if (info->board->chip_flag)
2340 outb((UART_FCR_CLEAR_RCVR |
2341 UART_FCR_CLEAR_XMIT |
2342 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
2344 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2345 info->ioaddr + UART_FCR);
2348 * At this point there's no way the LSR could still be 0xFF;
2349 * if it is, then bail out, because there's likely no UART
2352 if (inb(info->ioaddr + UART_LSR) == 0xff) {
2353 spin_unlock_irqrestore(&info->slock, flags);
2354 if (capable(CAP_SYS_ADMIN)) {
2356 set_bit(TTY_IO_ERROR, &info->tty->flags);
2363 * Clear the interrupt registers.
2365 (void) inb(info->ioaddr + UART_LSR);
2366 (void) inb(info->ioaddr + UART_RX);
2367 (void) inb(info->ioaddr + UART_IIR);
2368 (void) inb(info->ioaddr + UART_MSR);
2371 * Now, initialize the UART
2373 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
2374 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2375 outb(info->MCR, info->ioaddr + UART_MCR);
2378 * Finally, enable interrupts
2380 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2381 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2383 /* following add by Victor Yu. 08-30-2002 */
2384 if (info->board->chip_flag)
2385 info->IER |= MOXA_MUST_IER_EGDAI;
2386 /* above add by Victor Yu. 08-30-2002 */
2387 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
2390 * And clear the interrupt registers again for luck.
2392 (void) inb(info->ioaddr + UART_LSR);
2393 (void) inb(info->ioaddr + UART_RX);
2394 (void) inb(info->ioaddr + UART_IIR);
2395 (void) inb(info->ioaddr + UART_MSR);
2398 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2399 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2402 * and set the speed of the serial port
2404 spin_unlock_irqrestore(&info->slock, flags);
2405 mxser_change_speed(info, NULL);
2407 info->flags |= ASYNC_INITIALIZED;
2412 * This routine will shutdown a serial port; interrupts maybe disabled, and
2413 * DTR is dropped if the hangup on close termio flag is on.
2415 static void mxser_shutdown(struct mxser_port *info)
2417 unsigned long flags;
2419 if (!(info->flags & ASYNC_INITIALIZED))
2422 spin_lock_irqsave(&info->slock, flags);
2425 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2426 * here so the queue might never be waken up
2428 wake_up_interruptible(&info->delta_msr_wait);
2431 * Free the IRQ, if necessary
2433 if (info->xmit_buf) {
2434 free_page((unsigned long) info->xmit_buf);
2435 info->xmit_buf = NULL;
2439 outb(0x00, info->ioaddr + UART_IER);
2441 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2442 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2443 outb(info->MCR, info->ioaddr + UART_MCR);
2445 /* clear Rx/Tx FIFO's */
2446 /* following add by Victor Yu. 08-30-2002 */
2447 if (info->board->chip_flag)
2448 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
2449 MOXA_MUST_FCR_GDA_MODE_ENABLE,
2450 info->ioaddr + UART_FCR);
2452 /* above add by Victor Yu. 08-30-2002 */
2453 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
2454 info->ioaddr + UART_FCR);
2456 /* read data port to reset things */
2457 (void) inb(info->ioaddr + UART_RX);
2460 set_bit(TTY_IO_ERROR, &info->tty->flags);
2462 info->flags &= ~ASYNC_INITIALIZED;
2464 /* following add by Victor Yu. 09-23-2002 */
2465 if (info->board->chip_flag)
2466 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2467 /* above add by Victor Yu. 09-23-2002 */
2469 spin_unlock_irqrestore(&info->slock, flags);
2473 * This routine is called to set the UART divisor registers to match
2474 * the specified baud rate for a serial port.
2476 static int mxser_change_speed(struct mxser_port *info,
2477 struct termios *old_termios)
2479 unsigned cflag, cval, fcr;
2481 unsigned char status;
2483 unsigned long flags;
2485 if (!info->tty || !info->tty->termios)
2487 cflag = info->tty->termios->c_cflag;
2488 if (!(info->ioaddr))
2492 #define B921600 (B460800 +1)
2494 if (mxser_set_baud_method[info->tty->index] == 0) {
2495 baud = tty_get_baud_rate(info->tty);
2496 mxser_set_baud(info, baud);
2499 /* byte size and parity */
2500 switch (cflag & CSIZE) {
2515 break; /* too keep GCC shut... */
2520 cval |= UART_LCR_PARITY;
2521 if (!(cflag & PARODD))
2522 cval |= UART_LCR_EPAR;
2524 cval |= UART_LCR_SPAR;
2526 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2527 if (info->board->chip_flag) {
2528 fcr = UART_FCR_ENABLE_FIFO;
2529 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2530 SET_MOXA_MUST_FIFO_VALUE(info);
2534 fcr = UART_FCR_ENABLE_FIFO;
2535 /* following add by Victor Yu. 08-30-2002 */
2536 if (info->board->chip_flag) {
2537 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2538 SET_MOXA_MUST_FIFO_VALUE(info);
2540 /* above add by Victor Yu. 08-30-2002 */
2541 switch (info->rx_trigger) {
2543 fcr |= UART_FCR_TRIGGER_1;
2546 fcr |= UART_FCR_TRIGGER_4;
2549 fcr |= UART_FCR_TRIGGER_8;
2552 fcr |= UART_FCR_TRIGGER_14;
2558 /* CTS flow control flag and modem status interrupts */
2559 info->IER &= ~UART_IER_MSI;
2560 info->MCR &= ~UART_MCR_AFE;
2561 if (cflag & CRTSCTS) {
2562 info->flags |= ASYNC_CTS_FLOW;
2563 info->IER |= UART_IER_MSI;
2564 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
2565 info->MCR |= UART_MCR_AFE;
2566 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2570 status = inb(baseaddr + UART_MSR);
2571 restore_flags(flags);
2573 /* mxser_check_modem_status(info, status); */
2575 /* status = mxser_get_msr(info->ioaddr, 0, info->port); */
2576 /* MX_LOCK(&info->slock); */
2577 status = inb(info->ioaddr + UART_MSR);
2578 /* MX_UNLOCK(&info->slock); */
2579 if (info->tty->hw_stopped) {
2580 if (status & UART_MSR_CTS) {
2581 info->tty->hw_stopped = 0;
2582 if (info->type != PORT_16550A &&
2583 !info->board->chip_flag) {
2584 outb(info->IER & ~UART_IER_THRI,
2587 info->IER |= UART_IER_THRI;
2588 outb(info->IER, info->ioaddr +
2591 set_bit(MXSER_EVENT_TXLOW, &info->event);
2592 schedule_work(&info->tqueue); }
2594 if (!(status & UART_MSR_CTS)) {
2595 info->tty->hw_stopped = 1;
2596 if ((info->type != PORT_16550A) &&
2597 (!info->board->chip_flag)) {
2598 info->IER &= ~UART_IER_THRI;
2599 outb(info->IER, info->ioaddr +
2606 info->flags &= ~ASYNC_CTS_FLOW;
2608 outb(info->MCR, info->ioaddr + UART_MCR);
2609 if (cflag & CLOCAL) {
2610 info->flags &= ~ASYNC_CHECK_CD;
2612 info->flags |= ASYNC_CHECK_CD;
2613 info->IER |= UART_IER_MSI;
2615 outb(info->IER, info->ioaddr + UART_IER);
2618 * Set up parity check flag
2620 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2621 if (I_INPCK(info->tty))
2622 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2623 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2624 info->read_status_mask |= UART_LSR_BI;
2626 info->ignore_status_mask = 0;
2628 if (I_IGNBRK(info->tty)) {
2629 info->ignore_status_mask |= UART_LSR_BI;
2630 info->read_status_mask |= UART_LSR_BI;
2632 * If we're ignore parity and break indicators, ignore
2633 * overruns too. (For real raw support).
2635 if (I_IGNPAR(info->tty)) {
2636 info->ignore_status_mask |=
2640 info->read_status_mask |=
2646 /* following add by Victor Yu. 09-02-2002 */
2647 if (info->board->chip_flag) {
2648 spin_lock_irqsave(&info->slock, flags);
2649 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
2650 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
2651 if (I_IXON(info->tty)) {
2652 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2654 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2656 if (I_IXOFF(info->tty)) {
2657 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2659 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
2662 if ( I_IXANY(info->tty) ) {
2663 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2664 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2666 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2667 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->ioaddr);
2670 spin_unlock_irqrestore(&info->slock, flags);
2672 /* above add by Victor Yu. 09-02-2002 */
2675 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
2676 outb(cval, info->ioaddr + UART_LCR);
2682 static int mxser_set_baud(struct mxser_port *info, long newspd)
2687 unsigned long flags;
2689 if (!info->tty || !info->tty->termios)
2692 if (!(info->ioaddr))
2695 if (newspd > info->max_baud)
2698 info->realbaud = newspd;
2699 if (newspd == 134) {
2700 quot = (2 * info->baud_base / 269);
2701 } else if (newspd) {
2702 quot = info->baud_base / newspd;
2709 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2710 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2713 spin_lock_irqsave(&info->slock, flags);
2714 info->MCR |= UART_MCR_DTR;
2715 outb(info->MCR, info->ioaddr + UART_MCR);
2716 spin_unlock_irqrestore(&info->slock, flags);
2718 spin_lock_irqsave(&info->slock, flags);
2719 info->MCR &= ~UART_MCR_DTR;
2720 outb(info->MCR, info->ioaddr + UART_MCR);
2721 spin_unlock_irqrestore(&info->slock, flags);
2725 cval = inb(info->ioaddr + UART_LCR);
2727 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
2729 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
2730 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
2731 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
2738 * ------------------------------------------------------------
2739 * friends of mxser_ioctl()
2740 * ------------------------------------------------------------
2742 static int mxser_get_serial_info(struct mxser_port *info,
2743 struct serial_struct __user *retinfo)
2745 struct serial_struct tmp;
2749 memset(&tmp, 0, sizeof(tmp));
2750 tmp.type = info->type;
2751 tmp.line = info->tty->index;
2752 tmp.port = info->ioaddr;
2753 tmp.irq = info->board->irq;
2754 tmp.flags = info->flags;
2755 tmp.baud_base = info->baud_base;
2756 tmp.close_delay = info->close_delay;
2757 tmp.closing_wait = info->closing_wait;
2758 tmp.custom_divisor = info->custom_divisor;
2760 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2765 static int mxser_set_serial_info(struct mxser_port *info,
2766 struct serial_struct __user *new_info)
2768 struct serial_struct new_serial;
2772 if (!new_info || !info->ioaddr)
2774 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2777 if ((new_serial.irq != info->board->irq) ||
2778 (new_serial.port != info->ioaddr) ||
2779 (new_serial.custom_divisor != info->custom_divisor) ||
2780 (new_serial.baud_base != info->baud_base))
2783 flags = info->flags & ASYNC_SPD_MASK;
2785 if (!capable(CAP_SYS_ADMIN)) {
2786 if ((new_serial.baud_base != info->baud_base) ||
2787 (new_serial.close_delay != info->close_delay) ||
2788 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2790 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2791 (new_serial.flags & ASYNC_USR_MASK));
2794 * OK, past this point, all the error checking has been done.
2795 * At this point, we start making changes.....
2797 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2798 (new_serial.flags & ASYNC_FLAGS));
2799 info->close_delay = new_serial.close_delay * HZ / 100;
2800 info->closing_wait = new_serial.closing_wait * HZ / 100;
2801 info->tty->low_latency =
2802 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2803 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2806 /* added by casper, 3/17/2000, for mouse */
2807 info->type = new_serial.type;
2809 process_txrx_fifo(info);
2811 if (info->flags & ASYNC_INITIALIZED) {
2812 if (flags != (info->flags & ASYNC_SPD_MASK))
2813 mxser_change_speed(info, NULL);
2815 retval = mxser_startup(info);
2821 * mxser_get_lsr_info - get line status register info
2823 * Purpose: Let user call ioctl() to get info when the UART physically
2824 * is emptied. On bus types like RS485, the transmitter must
2825 * release the bus after transmitting. This must be done when
2826 * the transmit shift register is empty, not be done when the
2827 * transmit holding register is empty. This functionality
2828 * allows an RS485 driver to be written in user space.
2830 static int mxser_get_lsr_info(struct mxser_port *info,
2831 unsigned int __user *value)
2833 unsigned char status;
2834 unsigned int result;
2835 unsigned long flags;
2837 spin_lock_irqsave(&info->slock, flags);
2838 status = inb(info->ioaddr + UART_LSR);
2839 spin_unlock_irqrestore(&info->slock, flags);
2840 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2841 return put_user(result, value);
2845 * This routine sends a break character out the serial port.
2847 static void mxser_send_break(struct mxser_port *info, int duration)
2849 unsigned long flags;
2853 set_current_state(TASK_INTERRUPTIBLE);
2854 spin_lock_irqsave(&info->slock, flags);
2855 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2856 info->ioaddr + UART_LCR);
2857 spin_unlock_irqrestore(&info->slock, flags);
2858 schedule_timeout(duration);
2859 spin_lock_irqsave(&info->slock, flags);
2860 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2861 info->ioaddr + UART_LCR);
2862 spin_unlock_irqrestore(&info->slock, flags);
2865 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2867 struct mxser_port *info = tty->driver_data;
2868 unsigned char control, status;
2869 unsigned long flags;
2872 if (tty->index == MXSER_PORTS)
2873 return -ENOIOCTLCMD;
2874 if (tty->flags & (1 << TTY_IO_ERROR))
2877 control = info->MCR;
2879 spin_lock_irqsave(&info->slock, flags);
2880 status = inb(info->ioaddr + UART_MSR);
2881 if (status & UART_MSR_ANY_DELTA)
2882 mxser_check_modem_status(info, status);
2883 spin_unlock_irqrestore(&info->slock, flags);
2884 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2885 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2886 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2887 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2888 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2889 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2892 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
2893 unsigned int set, unsigned int clear)
2895 struct mxser_port *info = tty->driver_data;
2896 unsigned long flags;
2899 if (tty->index == MXSER_PORTS)
2900 return -ENOIOCTLCMD;
2901 if (tty->flags & (1 << TTY_IO_ERROR))
2904 spin_lock_irqsave(&info->slock, flags);
2906 if (set & TIOCM_RTS)
2907 info->MCR |= UART_MCR_RTS;
2908 if (set & TIOCM_DTR)
2909 info->MCR |= UART_MCR_DTR;
2911 if (clear & TIOCM_RTS)
2912 info->MCR &= ~UART_MCR_RTS;
2913 if (clear & TIOCM_DTR)
2914 info->MCR &= ~UART_MCR_DTR;
2916 outb(info->MCR, info->ioaddr + UART_MCR);
2917 spin_unlock_irqrestore(&info->slock, flags);
2922 static int mxser_read_register(int, unsigned short *);
2923 static int mxser_program_mode(int);
2924 static void mxser_normal_mode(int);
2926 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2929 unsigned short regs[16], irq;
2930 unsigned char scratch, scratch2;
2932 brd->chip_flag = MOXA_OTHER_UART;
2934 id = mxser_read_register(cap, regs);
2935 if (id == C168_ASIC_ID) {
2936 brd->board_type = MXSER_BOARD_C168_ISA;
2938 } else if (id == C104_ASIC_ID) {
2939 brd->board_type = MXSER_BOARD_C104_ISA;
2941 } else if (id == C102_ASIC_ID) {
2942 brd->board_type = MXSER_BOARD_C102_ISA;
2944 } else if (id == CI132_ASIC_ID) {
2945 brd->board_type = MXSER_BOARD_CI132;
2947 } else if (id == CI134_ASIC_ID) {
2948 brd->board_type = MXSER_BOARD_CI134;
2950 } else if (id == CI104J_ASIC_ID) {
2951 brd->board_type = MXSER_BOARD_CI104J;
2957 if (brd->nports == 2) {
2958 irq = regs[9] & 0xF000;
2959 irq = irq | (irq >> 4);
2960 if (irq != (regs[9] & 0xFF00))
2961 return MXSER_ERR_IRQ_CONFLIT;
2962 } else if (brd->nports == 4) {
2963 irq = regs[9] & 0xF000;
2964 irq = irq | (irq >> 4);
2965 irq = irq | (irq >> 8);
2967 return MXSER_ERR_IRQ_CONFLIT;
2968 } else if (brd->nports == 8) {
2969 irq = regs[9] & 0xF000;
2970 irq = irq | (irq >> 4);
2971 irq = irq | (irq >> 8);
2972 if ((irq != regs[9]) || (irq != regs[10]))
2973 return MXSER_ERR_IRQ_CONFLIT;
2977 return MXSER_ERR_IRQ;
2978 brd->irq = ((int)(irq & 0xF000) >> 12);
2979 for (i = 0; i < 8; i++)
2980 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2981 if ((regs[12] & 0x80) == 0)
2982 return MXSER_ERR_VECTOR;
2983 brd->vector = (int)regs[11]; /* interrupt vector */
2985 brd->vector_mask = 0x00FF;
2987 brd->vector_mask = 0x000F;
2988 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2989 if (regs[12] & bits) {
2990 brd->ports[i].baud_base = 921600;
2991 brd->ports[i].max_baud = 921600; /* add by Victor Yu. 09-04-2002 */
2993 brd->ports[i].baud_base = 115200;
2994 brd->ports[i].max_baud = 115200; /* add by Victor Yu. 09-04-2002 */
2997 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2998 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2999 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3000 outb(scratch2, cap + UART_LCR);
3001 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3002 scratch = inb(cap + UART_IIR);
3005 brd->uart_type = PORT_16550A;
3007 brd->uart_type = PORT_16450;
3012 request_region(brd->ports[0].ioaddr, 8 * brd->nports, "mxser(IO)");
3013 request_region(brd->vector, 1, "mxser(vector)");
3017 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3018 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3019 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3020 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3021 #define EN_CCMD 0x000 /* Chip's command register */
3022 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3023 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3024 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3025 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3026 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3027 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3028 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3029 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3030 static int mxser_read_register(int port, unsigned short *regs)
3032 int i, k, value, id;
3035 id = mxser_program_mode(port);
3038 for (i = 0; i < 14; i++) {
3039 k = (i & 0x3F) | 0x180;
3040 for (j = 0x100; j > 0; j >>= 1) {
3041 outb(CHIP_CS, port);
3043 outb(CHIP_CS | CHIP_DO, port);
3044 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3046 outb(CHIP_CS, port);
3047 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3052 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3053 outb(CHIP_CS, port);
3054 outb(CHIP_CS | CHIP_SK, port);
3055 if (inb(port) & CHIP_DI)
3061 mxser_normal_mode(port);
3065 static int mxser_program_mode(int port)
3068 /* unsigned long flags; */
3070 spin_lock(&gm_lock);
3078 /* restore_flags(flags); */
3079 spin_unlock(&gm_lock);
3081 id = inb(port + 1) & 0x1F;
3082 if ((id != C168_ASIC_ID) &&
3083 (id != C104_ASIC_ID) &&
3084 (id != C102_ASIC_ID) &&
3085 (id != CI132_ASIC_ID) &&
3086 (id != CI134_ASIC_ID) &&
3087 (id != CI104J_ASIC_ID))
3089 for (i = 0, j = 0; i < 4; i++) {
3093 } else if ((j == 1) && (n == 1)) {
3104 static void mxser_normal_mode(int port)
3108 outb(0xA5, port + 1);
3109 outb(0x80, port + 3);
3110 outb(12, port + 0); /* 9600 bps */
3112 outb(0x03, port + 3); /* 8 data bits */
3113 outb(0x13, port + 4); /* loop back mode */
3114 for (i = 0; i < 16; i++) {
3116 if ((n & 0x61) == 0x60)
3121 outb(0x00, port + 4);
3124 module_init(mxser_module_init);
3125 module_exit(mxser_module_exit);