1 /*****************************************************************************/
3 * moxa.c -- MOXA Intellio family multiport serial driver.
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
18 * MOXA Intellio Series Driver
24 #include <linux/module.h>
25 #include <linux/types.h>
27 #include <linux/ioport.h>
28 #include <linux/errno.h>
29 #include <linux/firmware.h>
30 #include <linux/signal.h>
31 #include <linux/sched.h>
32 #include <linux/timer.h>
33 #include <linux/interrupt.h>
34 #include <linux/tty.h>
35 #include <linux/tty_flip.h>
36 #include <linux/major.h>
37 #include <linux/string.h>
38 #include <linux/fcntl.h>
39 #include <linux/ptrace.h>
40 #include <linux/serial.h>
41 #include <linux/tty_driver.h>
42 #include <linux/delay.h>
43 #include <linux/pci.h>
44 #include <linux/init.h>
45 #include <linux/bitops.h>
47 #include <asm/system.h>
49 #include <asm/uaccess.h>
53 #define MOXA_VERSION "6.0k"
55 #define MOXA_FW_HDRLEN 32
59 #define MAX_BOARDS 4 /* Don't change this value */
60 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
61 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
63 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
64 (brd)->boardType == MOXA_BOARD_C320_PCI)
67 * Define the Moxa PCI vendor and device IDs.
69 #define MOXA_BUS_TYPE_ISA 0
70 #define MOXA_BUS_TYPE_PCI 1
73 MOXA_BOARD_C218_PCI = 1,
80 static char *moxa_brdname[] =
82 "C218 Turbo PCI series",
83 "C218 Turbo ISA series",
84 "C320 Turbo PCI series",
85 "C320 Turbo ISA series",
90 static struct pci_device_id moxa_pcibrds[] = {
91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
92 .driver_data = MOXA_BOARD_C218_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
94 .driver_data = MOXA_BOARD_C320_PCI },
95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
96 .driver_data = MOXA_BOARD_CP204J },
99 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
100 #endif /* CONFIG_PCI */
104 static struct moxa_board_conf {
111 struct moxa_port *ports;
113 void __iomem *basemem;
114 void __iomem *intNdx;
115 void __iomem *intPend;
116 void __iomem *intTable;
117 } moxa_boards[MAX_BOARDS];
119 struct mxser_mstatus {
133 struct tty_port port;
134 struct moxa_board_conf *board;
135 void __iomem *tableAddr;
140 unsigned long statusflags;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
154 #define TXSTOPPED 0x1
156 #define EMPTYWAIT 0x4
159 #define SERIAL_DO_RESTART
161 #define WAKEUP_CHARS 256
163 static int ttymajor = MOXAMAJOR;
164 static struct mon_str moxaLog;
165 static unsigned int moxaFuncTout = HZ / 2;
166 static unsigned int moxaLowWaterChk;
167 static DEFINE_MUTEX(moxa_openlock);
168 /* Variables for insmod */
170 static unsigned long baseaddr[MAX_BOARDS];
171 static unsigned int type[MAX_BOARDS];
172 static unsigned int numports[MAX_BOARDS];
175 MODULE_AUTHOR("William Chen");
176 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
177 MODULE_LICENSE("GPL");
179 module_param_array(type, uint, NULL, 0);
180 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
181 module_param_array(baseaddr, ulong, NULL, 0);
182 MODULE_PARM_DESC(baseaddr, "base address");
183 module_param_array(numports, uint, NULL, 0);
184 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
186 module_param(ttymajor, int, 0);
191 static int moxa_open(struct tty_struct *, struct file *);
192 static void moxa_close(struct tty_struct *, struct file *);
193 static int moxa_write(struct tty_struct *, const unsigned char *, int);
194 static int moxa_write_room(struct tty_struct *);
195 static void moxa_flush_buffer(struct tty_struct *);
196 static int moxa_chars_in_buffer(struct tty_struct *);
197 static void moxa_throttle(struct tty_struct *);
198 static void moxa_unthrottle(struct tty_struct *);
199 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
200 static void moxa_stop(struct tty_struct *);
201 static void moxa_start(struct tty_struct *);
202 static void moxa_hangup(struct tty_struct *);
203 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
204 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
205 unsigned int set, unsigned int clear);
206 static void moxa_poll(unsigned long);
207 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
208 static void moxa_setup_empty_event(struct tty_struct *);
209 static void moxa_shut_down(struct moxa_port *);
211 * moxa board interface functions:
213 static void MoxaPortEnable(struct moxa_port *);
214 static void MoxaPortDisable(struct moxa_port *);
215 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
216 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
217 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
218 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
219 static int MoxaPortLineStatus(struct moxa_port *);
220 static void MoxaPortFlushData(struct moxa_port *, int);
221 static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
222 static int MoxaPortReadData(struct moxa_port *);
223 static int MoxaPortTxQueue(struct moxa_port *);
224 static int MoxaPortRxQueue(struct moxa_port *);
225 static int MoxaPortTxFree(struct moxa_port *);
226 static void MoxaPortTxDisable(struct moxa_port *);
227 static void MoxaPortTxEnable(struct moxa_port *);
228 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
229 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
230 static void MoxaSetFifo(struct moxa_port *port, int enable);
236 static void moxa_wait_finish(void __iomem *ofsAddr)
238 unsigned long end = jiffies + moxaFuncTout;
240 while (readw(ofsAddr + FuncCode) != 0)
241 if (time_after(jiffies, end))
243 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
244 printk(KERN_WARNING "moxa function expired\n");
247 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
249 writew(arg, ofsAddr + FuncArg);
250 writew(cmd, ofsAddr + FuncCode);
251 moxa_wait_finish(ofsAddr);
254 static void moxa_low_water_check(void __iomem *ofsAddr)
256 u16 rptr, wptr, mask, len;
258 if (readb(ofsAddr + FlagStat) & Xoff_state) {
259 rptr = readw(ofsAddr + RXrptr);
260 wptr = readw(ofsAddr + RXwptr);
261 mask = readw(ofsAddr + RX_mask);
262 len = (wptr - rptr) & mask;
263 if (len <= Low_water)
264 moxafunc(ofsAddr, FC_SendXon, 0);
272 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
273 unsigned int cmd, unsigned long arg)
275 struct moxa_port *ch = tty->driver_data;
276 void __user *argp = (void __user *)arg;
279 if (tty->index == MAX_PORTS) {
280 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
281 cmd != MOXA_GETMSTATUS)
287 case MOXA_GETDATACOUNT:
288 moxaLog.tick = jiffies;
289 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
292 case MOXA_FLUSH_QUEUE:
293 MoxaPortFlushData(ch, arg);
295 case MOXA_GET_IOQUEUE: {
296 struct moxaq_str __user *argm = argp;
297 struct moxaq_str tmp;
301 mutex_lock(&moxa_openlock);
302 for (i = 0; i < MAX_BOARDS; i++) {
303 p = moxa_boards[i].ports;
304 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
305 memset(&tmp, 0, sizeof(tmp));
306 if (moxa_boards[i].ready) {
307 tmp.inq = MoxaPortRxQueue(p);
308 tmp.outq = MoxaPortTxQueue(p);
310 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
311 mutex_unlock(&moxa_openlock);
316 mutex_unlock(&moxa_openlock);
318 } case MOXA_GET_OQUEUE:
319 status = MoxaPortTxQueue(ch);
320 ret = put_user(status, (unsigned long __user *)argp);
322 case MOXA_GET_IQUEUE:
323 status = MoxaPortRxQueue(ch);
324 ret = put_user(status, (unsigned long __user *)argp);
326 case MOXA_GETMSTATUS: {
327 struct mxser_mstatus __user *argm = argp;
328 struct mxser_mstatus tmp;
332 mutex_lock(&moxa_openlock);
333 for (i = 0; i < MAX_BOARDS; i++) {
334 p = moxa_boards[i].ports;
335 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
336 memset(&tmp, 0, sizeof(tmp));
337 if (!moxa_boards[i].ready)
340 status = MoxaPortLineStatus(p);
348 if (!p->port.tty || !p->port.tty->termios)
349 tmp.cflag = p->cflag;
351 tmp.cflag = p->port.tty->termios->c_cflag;
353 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
354 mutex_unlock(&moxa_openlock);
359 mutex_unlock(&moxa_openlock);
363 mutex_lock(&moxa_openlock);
364 ret = moxa_get_serial_info(ch, argp);
365 mutex_unlock(&moxa_openlock);
368 mutex_lock(&moxa_openlock);
369 ret = moxa_set_serial_info(ch, argp);
370 mutex_unlock(&moxa_openlock);
378 static void moxa_break_ctl(struct tty_struct *tty, int state)
380 struct moxa_port *port = tty->driver_data;
382 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
386 static const struct tty_operations moxa_ops = {
390 .write_room = moxa_write_room,
391 .flush_buffer = moxa_flush_buffer,
392 .chars_in_buffer = moxa_chars_in_buffer,
394 .throttle = moxa_throttle,
395 .unthrottle = moxa_unthrottle,
396 .set_termios = moxa_set_termios,
399 .hangup = moxa_hangup,
400 .break_ctl = moxa_break_ctl,
401 .tiocmget = moxa_tiocmget,
402 .tiocmset = moxa_tiocmset,
405 static struct tty_driver *moxaDriver;
406 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
407 static DEFINE_SPINLOCK(moxa_lock);
413 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
415 switch (brd->boardType) {
416 case MOXA_BOARD_C218_ISA:
417 case MOXA_BOARD_C218_PCI:
421 case MOXA_BOARD_CP204J:
435 static int moxa_check_fw(const void *ptr)
437 const __le16 *lptr = ptr;
439 if (*lptr != cpu_to_le16(0x7980))
445 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
448 void __iomem *baseAddr = brd->basemem;
451 writeb(HW_reset, baseAddr + Control_reg); /* reset */
453 memset_io(baseAddr, 0, 4096);
454 memcpy_toio(baseAddr, buf, len); /* download BIOS */
455 writeb(0, baseAddr + Control_reg); /* restart */
459 switch (brd->boardType) {
460 case MOXA_BOARD_C218_ISA:
461 case MOXA_BOARD_C218_PCI:
462 tmp = readw(baseAddr + C218_key);
463 if (tmp != C218_KeyCode)
466 case MOXA_BOARD_CP204J:
467 tmp = readw(baseAddr + C218_key);
468 if (tmp != CP204J_KeyCode)
472 tmp = readw(baseAddr + C320_key);
473 if (tmp != C320_KeyCode)
475 tmp = readw(baseAddr + C320_status);
476 if (tmp != STS_init) {
477 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
478 "module not found\n");
486 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
490 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
493 void __iomem *baseAddr = brd->basemem;
496 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
500 writew(len - 7168 - 2, baseAddr + C320bapi_len);
501 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
502 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
503 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
504 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
509 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
512 void __iomem *baseAddr = brd->basemem;
513 const u16 *uptr = ptr;
514 size_t wlen, len2, j;
515 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
516 unsigned int i, retry;
519 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
522 switch (brd->boardType) {
523 case MOXA_BOARD_CP204J:
524 case MOXA_BOARD_C218_ISA:
525 case MOXA_BOARD_C218_PCI:
527 loadbuf = C218_LoadBuf;
528 loadlen = C218DLoad_len;
529 checksum = C218check_sum;
530 checksum_ok = C218chksum_ok;
534 keycode = C320_KeyCode;
535 loadbuf = C320_LoadBuf;
536 loadlen = C320DLoad_len;
537 checksum = C320check_sum;
538 checksum_ok = C320chksum_ok;
544 for (i = 0; i < wlen; i++)
545 usum += le16_to_cpu(uptr[i]);
551 len2 = (wlen > 2048) ? 2048 : wlen;
553 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
556 writew(len2, baseAddr + loadlen);
557 writew(0, baseAddr + key);
558 for (i = 0; i < 100; i++) {
559 if (readw(baseAddr + key) == keycode)
563 if (readw(baseAddr + key) != keycode)
566 writew(0, baseAddr + loadlen);
567 writew(usum, baseAddr + checksum);
568 writew(0, baseAddr + key);
569 for (i = 0; i < 100; i++) {
570 if (readw(baseAddr + key) == keycode)
575 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
576 if (readb(baseAddr + checksum_ok) != 1)
579 writew(0, baseAddr + key);
580 for (i = 0; i < 600; i++) {
581 if (readw(baseAddr + Magic_no) == Magic_code)
585 if (readw(baseAddr + Magic_no) != Magic_code)
588 if (MOXA_IS_320(brd)) {
589 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
590 writew(0x3800, baseAddr + TMS320_PORT1);
591 writew(0x3900, baseAddr + TMS320_PORT2);
592 writew(28499, baseAddr + TMS320_CLOCK);
594 writew(0x3200, baseAddr + TMS320_PORT1);
595 writew(0x3400, baseAddr + TMS320_PORT2);
596 writew(19999, baseAddr + TMS320_CLOCK);
599 writew(1, baseAddr + Disable_IRQ);
600 writew(0, baseAddr + Magic_no);
601 for (i = 0; i < 500; i++) {
602 if (readw(baseAddr + Magic_no) == Magic_code)
606 if (readw(baseAddr + Magic_no) != Magic_code)
609 if (MOXA_IS_320(brd)) {
610 j = readw(baseAddr + Module_cnt);
613 brd->numPorts = j * 8;
614 writew(j, baseAddr + Module_no);
615 writew(0, baseAddr + Magic_no);
616 for (i = 0; i < 600; i++) {
617 if (readw(baseAddr + Magic_no) == Magic_code)
621 if (readw(baseAddr + Magic_no) != Magic_code)
624 brd->intNdx = baseAddr + IRQindex;
625 brd->intPend = baseAddr + IRQpending;
626 brd->intTable = baseAddr + IRQtable;
631 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
634 void __iomem *ofsAddr, *baseAddr = brd->basemem;
635 struct moxa_port *port;
639 printk(KERN_ERR "MOXA: bios length is not even\n");
643 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
647 switch (brd->boardType) {
648 case MOXA_BOARD_C218_ISA:
649 case MOXA_BOARD_C218_PCI:
650 case MOXA_BOARD_CP204J:
652 for (i = 0; i < brd->numPorts; i++, port++) {
655 port->tableAddr = baseAddr + Extern_table +
657 ofsAddr = port->tableAddr;
658 writew(C218rx_mask, ofsAddr + RX_mask);
659 writew(C218tx_mask, ofsAddr + TX_mask);
660 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
661 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
663 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
664 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
670 for (i = 0; i < brd->numPorts; i++, port++) {
673 port->tableAddr = baseAddr + Extern_table +
675 ofsAddr = port->tableAddr;
676 switch (brd->numPorts) {
678 writew(C320p8rx_mask, ofsAddr + RX_mask);
679 writew(C320p8tx_mask, ofsAddr + TX_mask);
680 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
681 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
682 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
683 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
687 writew(C320p16rx_mask, ofsAddr + RX_mask);
688 writew(C320p16tx_mask, ofsAddr + TX_mask);
689 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
690 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
691 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
692 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
696 writew(C320p24rx_mask, ofsAddr + RX_mask);
697 writew(C320p24tx_mask, ofsAddr + TX_mask);
698 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
699 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
700 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
701 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
704 writew(C320p32rx_mask, ofsAddr + RX_mask);
705 writew(C320p32tx_mask, ofsAddr + TX_mask);
706 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
707 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
708 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
709 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
710 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
719 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
721 const void *ptr = fw->data;
725 unsigned int a, lenp, lencnt;
728 __le32 magic; /* 0x34303430 */
730 u8 type; /* UNIX = 3 */
731 u8 model; /* C218T=1, C320T=2, CP204=3 */
736 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
738 if (fw->size < MOXA_FW_HDRLEN) {
739 strcpy(rsn, "too short (even header won't fit)");
742 if (hdr->magic != cpu_to_le32(0x30343034)) {
743 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
746 if (hdr->type != 3) {
747 sprintf(rsn, "not for linux, type is %u", hdr->type);
750 if (moxa_check_fw_model(brd, hdr->model)) {
751 sprintf(rsn, "not for this card, model is %u", hdr->model);
755 len = MOXA_FW_HDRLEN;
756 lencnt = hdr->model == 2 ? 5 : 3;
757 for (a = 0; a < ARRAY_SIZE(lens); a++) {
758 lens[a] = le16_to_cpu(hdr->len[a]);
759 if (lens[a] && len + lens[a] <= fw->size &&
760 moxa_check_fw(&fw->data[len]))
761 printk(KERN_WARNING "MOXA firmware: unexpected input "
762 "at offset %u, but going on\n", (u32)len);
763 if (!lens[a] && a < lencnt) {
764 sprintf(rsn, "too few entries in fw file");
770 if (len != fw->size) {
771 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
776 ptr += MOXA_FW_HDRLEN;
779 strcpy(rsn, "read above");
781 ret = moxa_load_bios(brd, ptr, lens[lenp]);
785 /* we skip the tty section (lens[1]), since we don't need it */
786 ptr += lens[lenp] + lens[lenp + 1];
787 lenp += 2; /* comm */
789 if (hdr->model == 2) {
790 ret = moxa_load_320b(brd, ptr, lens[lenp]);
793 /* skip another tty */
794 ptr += lens[lenp] + lens[lenp + 1];
798 ret = moxa_load_code(brd, ptr, lens[lenp]);
804 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
808 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
810 const struct firmware *fw;
816 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
818 if (brd->ports == NULL) {
819 printk(KERN_ERR "cannot allocate memory for ports\n");
824 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
825 p->type = PORT_16550A;
826 p->close_delay = 5 * HZ / 10;
827 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
828 tty_port_init(&p->port);
831 switch (brd->boardType) {
832 case MOXA_BOARD_C218_ISA:
833 case MOXA_BOARD_C218_PCI:
834 file = "c218tunx.cod";
836 case MOXA_BOARD_CP204J:
837 file = "cp204unx.cod";
840 file = "c320tunx.cod";
844 ret = request_firmware(&fw, file, dev);
846 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
847 "you've placed '%s' file into your firmware "
848 "loader directory (e.g. /lib/firmware)\n",
853 ret = moxa_load_fw(brd, fw);
855 release_firmware(fw);
860 spin_lock_bh(&moxa_lock);
862 if (!timer_pending(&moxaTimer))
863 mod_timer(&moxaTimer, jiffies + HZ / 50);
864 spin_unlock_bh(&moxa_lock);
873 static void moxa_board_deinit(struct moxa_board_conf *brd)
875 unsigned int a, opened;
877 mutex_lock(&moxa_openlock);
878 spin_lock_bh(&moxa_lock);
880 spin_unlock_bh(&moxa_lock);
882 /* pci hot-un-plug support */
883 for (a = 0; a < brd->numPorts; a++)
884 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
885 tty_hangup(brd->ports[a].port.tty);
888 for (a = 0; a < brd->numPorts; a++)
889 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
891 mutex_unlock(&moxa_openlock);
895 mutex_lock(&moxa_openlock);
898 iounmap(brd->basemem);
904 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
905 const struct pci_device_id *ent)
907 struct moxa_board_conf *board;
909 int board_type = ent->driver_data;
912 retval = pci_enable_device(pdev);
914 dev_err(&pdev->dev, "can't enable pci device\n");
918 for (i = 0; i < MAX_BOARDS; i++)
919 if (moxa_boards[i].basemem == NULL)
923 if (i >= MAX_BOARDS) {
924 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
925 "found. Board is ignored.\n", MAX_BOARDS);
929 board = &moxa_boards[i];
931 retval = pci_request_region(pdev, 2, "moxa-base");
933 dev_err(&pdev->dev, "can't request pci region 2\n");
937 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
938 if (board->basemem == NULL) {
939 dev_err(&pdev->dev, "can't remap io space 2\n");
943 board->boardType = board_type;
944 switch (board_type) {
945 case MOXA_BOARD_C218_ISA:
946 case MOXA_BOARD_C218_PCI:
950 case MOXA_BOARD_CP204J:
957 board->busType = MOXA_BUS_TYPE_PCI;
959 retval = moxa_init_board(board, &pdev->dev);
963 pci_set_drvdata(pdev, board);
965 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
966 moxa_brdname[board_type - 1], board->numPorts);
970 iounmap(board->basemem);
971 board->basemem = NULL;
973 pci_release_region(pdev, 2);
978 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
980 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
982 moxa_board_deinit(brd);
984 pci_release_region(pdev, 2);
987 static struct pci_driver moxa_pci_driver = {
989 .id_table = moxa_pcibrds,
990 .probe = moxa_pci_probe,
991 .remove = __devexit_p(moxa_pci_remove)
993 #endif /* CONFIG_PCI */
995 static int __init moxa_init(void)
997 unsigned int isabrds = 0;
1000 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1002 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1006 moxaDriver->owner = THIS_MODULE;
1007 moxaDriver->name = "ttyMX";
1008 moxaDriver->major = ttymajor;
1009 moxaDriver->minor_start = 0;
1010 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1011 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1012 moxaDriver->init_termios = tty_std_termios;
1013 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1014 moxaDriver->init_termios.c_ispeed = 9600;
1015 moxaDriver->init_termios.c_ospeed = 9600;
1016 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1017 tty_set_operations(moxaDriver, &moxa_ops);
1019 if (tty_register_driver(moxaDriver)) {
1020 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1021 put_tty_driver(moxaDriver);
1025 /* Find the boards defined from module args. */
1028 struct moxa_board_conf *brd = moxa_boards;
1030 for (i = 0; i < MAX_BOARDS; i++) {
1033 if (type[i] == MOXA_BOARD_C218_ISA ||
1034 type[i] == MOXA_BOARD_C320_ISA) {
1035 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1036 isabrds + 1, moxa_brdname[type[i] - 1],
1038 brd->boardType = type[i];
1039 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1041 brd->busType = MOXA_BUS_TYPE_ISA;
1042 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1043 if (!brd->basemem) {
1044 printk(KERN_ERR "MOXA: can't remap %lx\n",
1048 if (moxa_init_board(brd, NULL)) {
1049 iounmap(brd->basemem);
1050 brd->basemem = NULL;
1054 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1055 "ready (%u ports, firmware loaded)\n",
1056 baseaddr[i], brd->numPorts);
1066 retval = pci_register_driver(&moxa_pci_driver);
1068 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1077 static void __exit moxa_exit(void)
1082 pci_unregister_driver(&moxa_pci_driver);
1085 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1086 if (moxa_boards[i].ready)
1087 moxa_board_deinit(&moxa_boards[i]);
1089 del_timer_sync(&moxaTimer);
1091 if (tty_unregister_driver(moxaDriver))
1092 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1094 put_tty_driver(moxaDriver);
1097 module_init(moxa_init);
1098 module_exit(moxa_exit);
1100 static void moxa_close_port(struct moxa_port *ch)
1103 MoxaPortFlushData(ch, 2);
1104 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1105 ch->port.tty->driver_data = NULL;
1106 ch->port.tty = NULL;
1109 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1110 struct moxa_port *ch)
1117 prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
1118 if (tty_hung_up_p(filp)) {
1119 #ifdef SERIAL_DO_RESTART
1120 retval = -ERESTARTSYS;
1126 spin_lock_bh(&moxa_lock);
1128 spin_unlock_bh(&moxa_lock);
1132 if (signal_pending(current)) {
1133 retval = -ERESTARTSYS;
1138 finish_wait(&ch->port.open_wait, &wait);
1143 static int moxa_open(struct tty_struct *tty, struct file *filp)
1145 struct moxa_board_conf *brd;
1146 struct moxa_port *ch;
1151 if (port == MAX_PORTS) {
1152 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1154 if (mutex_lock_interruptible(&moxa_openlock))
1155 return -ERESTARTSYS;
1156 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1158 mutex_unlock(&moxa_openlock);
1162 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1164 tty->driver_data = ch;
1166 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1167 ch->statusflags = 0;
1168 moxa_set_tty_param(tty, tty->termios);
1169 MoxaPortLineCtrl(ch, 1, 1);
1171 MoxaSetFifo(ch, ch->type == PORT_16550A);
1172 ch->port.flags |= ASYNC_INITIALIZED;
1174 mutex_unlock(&moxa_openlock);
1177 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1178 retval = moxa_block_till_ready(tty, filp, ch);
1179 mutex_lock(&moxa_openlock);
1181 if (ch->port.count) /* 0 means already hung up... */
1182 if (--ch->port.count == 0)
1183 moxa_close_port(ch);
1185 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
1186 mutex_unlock(&moxa_openlock);
1191 static void moxa_close(struct tty_struct *tty, struct file *filp)
1193 struct moxa_port *ch;
1197 if (port == MAX_PORTS || tty_hung_up_p(filp))
1200 mutex_lock(&moxa_openlock);
1201 ch = tty->driver_data;
1204 if (tty->count == 1 && ch->port.count != 1) {
1205 printk(KERN_WARNING "moxa_close: bad serial port count; "
1206 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1209 if (--ch->port.count < 0) {
1210 printk(KERN_WARNING "moxa_close: bad serial port count, "
1211 "device=%s\n", tty->name);
1217 ch->cflag = tty->termios->c_cflag;
1218 if (ch->port.flags & ASYNC_INITIALIZED) {
1219 moxa_setup_empty_event(tty);
1220 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1223 moxa_close_port(ch);
1225 mutex_unlock(&moxa_openlock);
1228 static int moxa_write(struct tty_struct *tty,
1229 const unsigned char *buf, int count)
1231 struct moxa_port *ch = tty->driver_data;
1237 spin_lock_bh(&moxa_lock);
1238 len = MoxaPortWriteData(ch, buf, count);
1239 spin_unlock_bh(&moxa_lock);
1241 ch->statusflags |= LOWWAIT;
1245 static int moxa_write_room(struct tty_struct *tty)
1247 struct moxa_port *ch;
1251 ch = tty->driver_data;
1254 return MoxaPortTxFree(ch);
1257 static void moxa_flush_buffer(struct tty_struct *tty)
1259 struct moxa_port *ch = tty->driver_data;
1263 MoxaPortFlushData(ch, 1);
1267 static int moxa_chars_in_buffer(struct tty_struct *tty)
1269 struct moxa_port *ch = tty->driver_data;
1273 * Sigh...I have to check if driver_data is NULL here, because
1274 * if an open() fails, the TTY subsystem eventually calls
1275 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1276 * routine. And since the open() failed, we return 0 here. TDJ
1281 chars = MoxaPortTxQueue(ch);
1284 * Make it possible to wakeup anything waiting for output
1285 * in tty_ioctl.c, etc.
1287 if (!(ch->statusflags & EMPTYWAIT))
1288 moxa_setup_empty_event(tty);
1294 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1296 struct moxa_port *ch;
1297 int flag = 0, dtr, rts;
1299 mutex_lock(&moxa_openlock);
1300 ch = tty->driver_data;
1302 mutex_unlock(&moxa_openlock);
1306 MoxaPortGetLineOut(ch, &dtr, &rts);
1311 dtr = MoxaPortLineStatus(ch);
1318 mutex_unlock(&moxa_openlock);
1322 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1323 unsigned int set, unsigned int clear)
1325 struct moxa_port *ch;
1330 mutex_lock(&moxa_openlock);
1331 ch = tty->driver_data;
1333 mutex_unlock(&moxa_openlock);
1337 MoxaPortGetLineOut(ch, &dtr, &rts);
1338 if (set & TIOCM_RTS)
1340 if (set & TIOCM_DTR)
1342 if (clear & TIOCM_RTS)
1344 if (clear & TIOCM_DTR)
1346 MoxaPortLineCtrl(ch, dtr, rts);
1347 mutex_unlock(&moxa_openlock);
1351 static void moxa_throttle(struct tty_struct *tty)
1353 struct moxa_port *ch = tty->driver_data;
1355 ch->statusflags |= THROTTLE;
1358 static void moxa_unthrottle(struct tty_struct *tty)
1360 struct moxa_port *ch = tty->driver_data;
1362 ch->statusflags &= ~THROTTLE;
1365 static void moxa_set_termios(struct tty_struct *tty,
1366 struct ktermios *old_termios)
1368 struct moxa_port *ch = tty->driver_data;
1372 moxa_set_tty_param(tty, old_termios);
1373 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1374 wake_up_interruptible(&ch->port.open_wait);
1377 static void moxa_stop(struct tty_struct *tty)
1379 struct moxa_port *ch = tty->driver_data;
1383 MoxaPortTxDisable(ch);
1384 ch->statusflags |= TXSTOPPED;
1388 static void moxa_start(struct tty_struct *tty)
1390 struct moxa_port *ch = tty->driver_data;
1395 if (!(ch->statusflags & TXSTOPPED))
1398 MoxaPortTxEnable(ch);
1399 ch->statusflags &= ~TXSTOPPED;
1402 static void moxa_hangup(struct tty_struct *tty)
1404 struct moxa_port *ch;
1406 mutex_lock(&moxa_openlock);
1407 ch = tty->driver_data;
1409 mutex_unlock(&moxa_openlock);
1413 moxa_close_port(ch);
1414 mutex_unlock(&moxa_openlock);
1416 wake_up_interruptible(&ch->port.open_wait);
1419 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1423 if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
1425 tty_hangup(p->port.tty);
1430 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1433 struct tty_struct *tty = p->port.tty;
1434 void __iomem *ofsAddr;
1435 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1439 if ((p->statusflags & EMPTYWAIT) &&
1440 MoxaPortTxQueue(p) == 0) {
1441 p->statusflags &= ~EMPTYWAIT;
1444 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1445 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1446 p->statusflags &= ~LOWWAIT;
1450 if (inited && !(p->statusflags & THROTTLE) &&
1451 MoxaPortRxQueue(p) > 0) { /* RX */
1452 MoxaPortReadData(p);
1453 tty_schedule_flip(tty);
1456 p->statusflags &= ~EMPTYWAIT;
1457 MoxaPortFlushData(p, 0); /* flush RX */
1460 if (!handle) /* nothing else to do */
1463 intr = readw(ip); /* port irq status */
1467 writew(0, ip); /* ACK port */
1468 ofsAddr = p->tableAddr;
1469 if (intr & IntrTx) /* disable tx intr */
1470 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1471 ofsAddr + HostStat);
1476 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1477 tty_insert_flip_char(tty, 0, TTY_BREAK);
1478 tty_schedule_flip(tty);
1481 if (intr & IntrLine)
1482 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1487 static void moxa_poll(unsigned long ignored)
1489 struct moxa_board_conf *brd;
1491 unsigned int card, port, served = 0;
1493 spin_lock(&moxa_lock);
1494 for (card = 0; card < MAX_BOARDS; card++) {
1495 brd = &moxa_boards[card];
1502 if (readb(brd->intPend) == 0xff)
1503 ip = brd->intTable + readb(brd->intNdx);
1505 for (port = 0; port < brd->numPorts; port++)
1506 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1509 writeb(0, brd->intPend); /* ACK */
1511 if (moxaLowWaterChk) {
1512 struct moxa_port *p = brd->ports;
1513 for (port = 0; port < brd->numPorts; port++, p++)
1514 if (p->lowChkFlag) {
1516 moxa_low_water_check(p->tableAddr);
1520 moxaLowWaterChk = 0;
1523 mod_timer(&moxaTimer, jiffies + HZ / 50);
1524 spin_unlock(&moxa_lock);
1527 /******************************************************************************/
1529 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1531 register struct ktermios *ts = tty->termios;
1532 struct moxa_port *ch = tty->driver_data;
1533 int rts, cts, txflow, rxflow, xany, baud;
1535 rts = cts = txflow = rxflow = xany = 0;
1536 if (ts->c_cflag & CRTSCTS)
1538 if (ts->c_iflag & IXON)
1540 if (ts->c_iflag & IXOFF)
1542 if (ts->c_iflag & IXANY)
1545 /* Clear the features we don't support */
1546 ts->c_cflag &= ~CMSPAR;
1547 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1548 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1550 baud = tty_termios_baud_rate(old_termios);
1551 /* Not put the baud rate into the termios data */
1552 tty_encode_baud_rate(tty, baud, baud);
1555 static void moxa_setup_empty_event(struct tty_struct *tty)
1557 struct moxa_port *ch = tty->driver_data;
1559 spin_lock_bh(&moxa_lock);
1560 ch->statusflags |= EMPTYWAIT;
1561 spin_unlock_bh(&moxa_lock);
1564 static void moxa_shut_down(struct moxa_port *ch)
1566 struct tty_struct *tp = ch->port.tty;
1568 if (!(ch->port.flags & ASYNC_INITIALIZED))
1571 MoxaPortDisable(ch);
1574 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1577 MoxaPortLineCtrl(ch, 0, 0);
1579 spin_lock_bh(&moxa_lock);
1580 ch->port.flags &= ~ASYNC_INITIALIZED;
1581 spin_unlock_bh(&moxa_lock);
1584 /*****************************************************************************
1585 * Driver level functions: *
1586 *****************************************************************************/
1588 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1590 void __iomem *ofsAddr;
1591 if (mode < 0 || mode > 2)
1593 ofsAddr = port->tableAddr;
1594 moxafunc(ofsAddr, FC_FlushQueue, mode);
1596 port->lowChkFlag = 0;
1597 moxa_low_water_check(ofsAddr);
1602 * Moxa Port Number Description:
1604 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1605 * the port number using in MOXA driver functions will be 0 to 31 for
1606 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1607 * to 127 for fourth. For example, if you setup three MOXA boards,
1608 * first board is C218, second board is C320-16 and third board is
1609 * C320-32. The port number of first board (C218 - 8 ports) is from
1610 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1611 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1612 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1613 * 127 will be invalid.
1616 * Moxa Functions Description:
1618 * Function 1: Driver initialization routine, this routine must be
1619 * called when initialized driver.
1621 * void MoxaDriverInit();
1624 * Function 2: Moxa driver private IOCTL command processing.
1626 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1628 * unsigned int cmd : IOCTL command
1629 * unsigned long arg : IOCTL argument
1630 * int port : port number (0 - 127)
1637 * Function 6: Enable this port to start Tx/Rx data.
1639 * void MoxaPortEnable(int port);
1640 * int port : port number (0 - 127)
1643 * Function 7: Disable this port
1645 * void MoxaPortDisable(int port);
1646 * int port : port number (0 - 127)
1649 * Function 10: Setting baud rate of this port.
1651 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1652 * int port : port number (0 - 127)
1653 * long baud : baud rate (50 - 115200)
1655 * return: 0 : this port is invalid or baud < 50
1656 * 50 - 115200 : the real baud rate set to the port, if
1657 * the argument baud is large than maximun
1658 * available baud rate, the real setting
1659 * baud rate will be the maximun baud rate.
1662 * Function 12: Configure the port.
1664 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1665 * int port : port number (0 - 127)
1666 * struct ktermios * termio : termio structure pointer
1667 * speed_t baud : baud rate
1669 * return: -1 : this port is invalid or termio == NULL
1673 * Function 13: Get the DTR/RTS state of this port.
1675 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1676 * int port : port number (0 - 127)
1677 * int * dtrState : pointer to INT to receive the current DTR
1678 * state. (if NULL, this function will not
1679 * write to this address)
1680 * int * rtsState : pointer to INT to receive the current RTS
1681 * state. (if NULL, this function will not
1682 * write to this address)
1684 * return: -1 : this port is invalid
1688 * Function 14: Setting the DTR/RTS output state of this port.
1690 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1691 * int port : port number (0 - 127)
1692 * int dtrState : DTR output state (0: off, 1: on)
1693 * int rtsState : RTS output state (0: off, 1: on)
1696 * Function 15: Setting the flow control of this port.
1698 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1699 * int txFlow,int xany);
1700 * int port : port number (0 - 127)
1701 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1702 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1703 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1704 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1705 * int xany : S/W XANY flow control (0: no, 1: yes)
1708 * Function 16: Get ths line status of this port
1710 * int MoxaPortLineStatus(int port);
1711 * int port : port number (0 - 127)
1713 * return: Bit 0 - CTS state (0: off, 1: on)
1714 * Bit 1 - DSR state (0: off, 1: on)
1715 * Bit 2 - DCD state (0: off, 1: on)
1718 * Function 19: Flush the Rx/Tx buffer data of this port.
1720 * void MoxaPortFlushData(int port, int mode);
1721 * int port : port number (0 - 127)
1723 * 0 : flush the Rx buffer
1724 * 1 : flush the Tx buffer
1725 * 2 : flush the Rx and Tx buffer
1728 * Function 20: Write data.
1730 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1731 * int port : port number (0 - 127)
1732 * unsigned char * buffer : pointer to write data buffer.
1733 * int length : write data length
1735 * return: 0 - length : real write data length
1738 * Function 21: Read data.
1740 * int MoxaPortReadData(int port, struct tty_struct *tty);
1741 * int port : port number (0 - 127)
1742 * struct tty_struct *tty : tty for data
1744 * return: 0 - length : real read data length
1747 * Function 24: Get the Tx buffer current queued data bytes
1749 * int MoxaPortTxQueue(int port);
1750 * int port : port number (0 - 127)
1752 * return: .. : Tx buffer current queued data bytes
1755 * Function 25: Get the Tx buffer current free space
1757 * int MoxaPortTxFree(int port);
1758 * int port : port number (0 - 127)
1760 * return: .. : Tx buffer current free space
1763 * Function 26: Get the Rx buffer current queued data bytes
1765 * int MoxaPortRxQueue(int port);
1766 * int port : port number (0 - 127)
1768 * return: .. : Rx buffer current queued data bytes
1771 * Function 28: Disable port data transmission.
1773 * void MoxaPortTxDisable(int port);
1774 * int port : port number (0 - 127)
1777 * Function 29: Enable port data transmission.
1779 * void MoxaPortTxEnable(int port);
1780 * int port : port number (0 - 127)
1783 * Function 31: Get the received BREAK signal count and reset it.
1785 * int MoxaPortResetBrkCnt(int port);
1786 * int port : port number (0 - 127)
1788 * return: 0 - .. : BREAK signal count
1793 static void MoxaPortEnable(struct moxa_port *port)
1795 void __iomem *ofsAddr;
1798 ofsAddr = port->tableAddr;
1799 writew(lowwater, ofsAddr + Low_water);
1800 if (MOXA_IS_320(port->board))
1801 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1803 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1804 ofsAddr + HostStat);
1806 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1807 moxafunc(ofsAddr, FC_FlushQueue, 2);
1809 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1810 MoxaPortLineStatus(port);
1813 static void MoxaPortDisable(struct moxa_port *port)
1815 void __iomem *ofsAddr = port->tableAddr;
1817 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1818 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1819 writew(0, ofsAddr + HostStat);
1820 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1823 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1825 void __iomem *ofsAddr = port->tableAddr;
1826 unsigned int clock, val;
1829 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1836 moxafunc(ofsAddr, FC_SetBaud, val);
1841 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1844 void __iomem *ofsAddr;
1848 ofsAddr = port->tableAddr;
1849 cflag = termio->c_cflag; /* termio->c_cflag */
1851 mode = termio->c_cflag & CSIZE;
1854 else if (mode == CS6)
1856 else if (mode == CS7)
1858 else if (mode == CS8)
1861 if (termio->c_cflag & CSTOPB) {
1869 if (termio->c_cflag & PARENB) {
1870 if (termio->c_cflag & PARODD)
1877 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1879 if (MOXA_IS_320(port->board) && baud >= 921600)
1882 baud = MoxaPortSetBaud(port, baud);
1884 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1885 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1886 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1887 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1888 moxa_wait_finish(ofsAddr);
1894 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1898 *dtrState = !!(port->lineCtrl & DTR_ON);
1900 *rtsState = !!(port->lineCtrl & RTS_ON);
1905 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1913 port->lineCtrl = mode;
1914 moxafunc(port->tableAddr, FC_LineControl, mode);
1917 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1918 int txflow, int rxflow, int txany)
1923 mode |= RTS_FlowCtl;
1925 mode |= CTS_FlowCtl;
1932 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1935 static int MoxaPortLineStatus(struct moxa_port *port)
1937 void __iomem *ofsAddr;
1940 ofsAddr = port->tableAddr;
1941 if (MOXA_IS_320(port->board)) {
1942 moxafunc(ofsAddr, FC_LineStatus, 0);
1943 val = readw(ofsAddr + FuncArg);
1945 val = readw(ofsAddr + FlagStat) >> 4;
1950 spin_lock_bh(&moxa_lock);
1951 moxa_new_dcdstate(port, val & 8);
1952 spin_unlock_bh(&moxa_lock);
1957 static int MoxaPortWriteData(struct moxa_port *port,
1958 const unsigned char *buffer, int len)
1960 void __iomem *baseAddr, *ofsAddr, *ofs;
1961 unsigned int c, total;
1962 u16 head, tail, tx_mask, spage, epage;
1963 u16 pageno, pageofs, bufhead;
1965 ofsAddr = port->tableAddr;
1966 baseAddr = port->board->basemem;
1967 tx_mask = readw(ofsAddr + TX_mask);
1968 spage = readw(ofsAddr + Page_txb);
1969 epage = readw(ofsAddr + EndPage_txb);
1970 tail = readw(ofsAddr + TXwptr);
1971 head = readw(ofsAddr + TXrptr);
1972 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1975 moxaLog.txcnt[port->port.tty->index] += c;
1977 if (spage == epage) {
1978 bufhead = readw(ofsAddr + Ofs_txb);
1979 writew(spage, baseAddr + Control_reg);
1982 len = head - tail - 1;
1984 len = tx_mask + 1 - tail;
1985 len = (c > len) ? len : c;
1986 ofs = baseAddr + DynPage_addr + bufhead + tail;
1987 memcpy_toio(ofs, buffer, len);
1989 tail = (tail + len) & tx_mask;
1993 pageno = spage + (tail >> 13);
1994 pageofs = tail & Page_mask;
1996 len = Page_size - pageofs;
1999 writeb(pageno, baseAddr + Control_reg);
2000 ofs = baseAddr + DynPage_addr + pageofs;
2001 memcpy_toio(ofs, buffer, len);
2003 if (++pageno == epage)
2008 tail = (tail + total) & tx_mask;
2010 writew(tail, ofsAddr + TXwptr);
2011 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2015 static int MoxaPortReadData(struct moxa_port *port)
2017 struct tty_struct *tty = port->port.tty;
2019 void __iomem *baseAddr, *ofsAddr, *ofs;
2020 unsigned int count, len, total;
2021 u16 tail, rx_mask, spage, epage;
2022 u16 pageno, pageofs, bufhead, head;
2024 ofsAddr = port->tableAddr;
2025 baseAddr = port->board->basemem;
2026 head = readw(ofsAddr + RXrptr);
2027 tail = readw(ofsAddr + RXwptr);
2028 rx_mask = readw(ofsAddr + RX_mask);
2029 spage = readw(ofsAddr + Page_rxb);
2030 epage = readw(ofsAddr + EndPage_rxb);
2031 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
2036 moxaLog.rxcnt[tty->index] += total;
2037 if (spage == epage) {
2038 bufhead = readw(ofsAddr + Ofs_rxb);
2039 writew(spage, baseAddr + Control_reg);
2041 ofs = baseAddr + DynPage_addr + bufhead + head;
2042 len = (tail >= head) ? (tail - head) :
2043 (rx_mask + 1 - head);
2044 len = tty_prepare_flip_string(tty, &dst,
2046 memcpy_fromio(dst, ofs, len);
2047 head = (head + len) & rx_mask;
2051 pageno = spage + (head >> 13);
2052 pageofs = head & Page_mask;
2054 writew(pageno, baseAddr + Control_reg);
2055 ofs = baseAddr + DynPage_addr + pageofs;
2056 len = tty_prepare_flip_string(tty, &dst,
2057 min(Page_size - pageofs, count));
2058 memcpy_fromio(dst, ofs, len);
2061 pageofs = (pageofs + len) & Page_mask;
2062 if (pageofs == 0 && ++pageno == epage)
2065 head = (head + total) & rx_mask;
2067 writew(head, ofsAddr + RXrptr);
2068 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2069 moxaLowWaterChk = 1;
2070 port->lowChkFlag = 1;
2076 static int MoxaPortTxQueue(struct moxa_port *port)
2078 void __iomem *ofsAddr = port->tableAddr;
2079 u16 rptr, wptr, mask;
2081 rptr = readw(ofsAddr + TXrptr);
2082 wptr = readw(ofsAddr + TXwptr);
2083 mask = readw(ofsAddr + TX_mask);
2084 return (wptr - rptr) & mask;
2087 static int MoxaPortTxFree(struct moxa_port *port)
2089 void __iomem *ofsAddr = port->tableAddr;
2090 u16 rptr, wptr, mask;
2092 rptr = readw(ofsAddr + TXrptr);
2093 wptr = readw(ofsAddr + TXwptr);
2094 mask = readw(ofsAddr + TX_mask);
2095 return mask - ((wptr - rptr) & mask);
2098 static int MoxaPortRxQueue(struct moxa_port *port)
2100 void __iomem *ofsAddr = port->tableAddr;
2101 u16 rptr, wptr, mask;
2103 rptr = readw(ofsAddr + RXrptr);
2104 wptr = readw(ofsAddr + RXwptr);
2105 mask = readw(ofsAddr + RX_mask);
2106 return (wptr - rptr) & mask;
2109 static void MoxaPortTxDisable(struct moxa_port *port)
2111 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2114 static void MoxaPortTxEnable(struct moxa_port *port)
2116 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2119 static int moxa_get_serial_info(struct moxa_port *info,
2120 struct serial_struct __user *retinfo)
2122 struct serial_struct tmp = {
2124 .line = info->port.tty->index,
2125 .flags = info->port.flags,
2126 .baud_base = 921600,
2127 .close_delay = info->close_delay
2129 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2133 static int moxa_set_serial_info(struct moxa_port *info,
2134 struct serial_struct __user *new_info)
2136 struct serial_struct new_serial;
2138 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2141 if (new_serial.irq != 0 || new_serial.port != 0 ||
2142 new_serial.custom_divisor != 0 ||
2143 new_serial.baud_base != 921600)
2146 if (!capable(CAP_SYS_ADMIN)) {
2147 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2148 (info->port.flags & ~ASYNC_USR_MASK)))
2151 info->close_delay = new_serial.close_delay * HZ / 100;
2153 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2154 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2156 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2158 info->type = new_serial.type;
2164 /*****************************************************************************
2165 * Static local functions: *
2166 *****************************************************************************/
2168 static void MoxaSetFifo(struct moxa_port *port, int enable)
2170 void __iomem *ofsAddr = port->tableAddr;
2173 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2174 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2176 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2177 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);