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/smp_lock.h>
38 #include <linux/string.h>
39 #include <linux/fcntl.h>
40 #include <linux/ptrace.h>
41 #include <linux/serial.h>
42 #include <linux/tty_driver.h>
43 #include <linux/delay.h>
44 #include <linux/pci.h>
45 #include <linux/init.h>
46 #include <linux/bitops.h>
48 #include <asm/system.h>
50 #include <asm/uaccess.h>
54 #define MOXA_VERSION "6.0k"
56 #define MOXA_FW_HDRLEN 32
60 #define MAX_BOARDS 4 /* Don't change this value */
61 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
62 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
64 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
68 * Define the Moxa PCI vendor and device IDs.
70 #define MOXA_BUS_TYPE_ISA 0
71 #define MOXA_BUS_TYPE_PCI 1
74 MOXA_BOARD_C218_PCI = 1,
81 static char *moxa_brdname[] =
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
91 static struct pci_device_id moxa_pcibrds[] = {
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
93 .driver_data = MOXA_BOARD_C218_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
95 .driver_data = MOXA_BOARD_C320_PCI },
96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
97 .driver_data = MOXA_BOARD_CP204J },
100 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101 #endif /* CONFIG_PCI */
105 static struct moxa_board_conf {
112 struct moxa_port *ports;
114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118 } moxa_boards[MAX_BOARDS];
120 struct mxser_mstatus {
134 struct tty_port port;
135 struct moxa_board_conf *board;
136 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 tty_struct *);
210 static int moxa_carrier_raised(struct tty_port *);
212 * moxa board interface functions:
214 static void MoxaPortEnable(struct moxa_port *);
215 static void MoxaPortDisable(struct moxa_port *);
216 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
217 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
218 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
219 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
220 static int MoxaPortLineStatus(struct moxa_port *);
221 static void MoxaPortFlushData(struct moxa_port *, int);
222 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
223 static int MoxaPortReadData(struct moxa_port *);
224 static int MoxaPortTxQueue(struct moxa_port *);
225 static int MoxaPortRxQueue(struct moxa_port *);
226 static int MoxaPortTxFree(struct moxa_port *);
227 static void MoxaPortTxDisable(struct moxa_port *);
228 static void MoxaPortTxEnable(struct moxa_port *);
229 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
230 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
231 static void MoxaSetFifo(struct moxa_port *port, int enable);
237 static void moxa_wait_finish(void __iomem *ofsAddr)
239 unsigned long end = jiffies + moxaFuncTout;
241 while (readw(ofsAddr + FuncCode) != 0)
242 if (time_after(jiffies, end))
244 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
245 printk(KERN_WARNING "moxa function expired\n");
248 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
250 writew(arg, ofsAddr + FuncArg);
251 writew(cmd, ofsAddr + FuncCode);
252 moxa_wait_finish(ofsAddr);
255 static void moxa_low_water_check(void __iomem *ofsAddr)
257 u16 rptr, wptr, mask, len;
259 if (readb(ofsAddr + FlagStat) & Xoff_state) {
260 rptr = readw(ofsAddr + RXrptr);
261 wptr = readw(ofsAddr + RXwptr);
262 mask = readw(ofsAddr + RX_mask);
263 len = (wptr - rptr) & mask;
264 if (len <= Low_water)
265 moxafunc(ofsAddr, FC_SendXon, 0);
273 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
274 unsigned int cmd, unsigned long arg)
276 struct moxa_port *ch = tty->driver_data;
277 void __user *argp = (void __user *)arg;
280 if (tty->index == MAX_PORTS) {
281 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
282 cmd != MOXA_GETMSTATUS)
288 case MOXA_GETDATACOUNT:
289 moxaLog.tick = jiffies;
290 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
293 case MOXA_FLUSH_QUEUE:
294 MoxaPortFlushData(ch, arg);
296 case MOXA_GET_IOQUEUE: {
297 struct moxaq_str __user *argm = argp;
298 struct moxaq_str tmp;
302 mutex_lock(&moxa_openlock);
303 for (i = 0; i < MAX_BOARDS; i++) {
304 p = moxa_boards[i].ports;
305 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
306 memset(&tmp, 0, sizeof(tmp));
307 if (moxa_boards[i].ready) {
308 tmp.inq = MoxaPortRxQueue(p);
309 tmp.outq = MoxaPortTxQueue(p);
311 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
312 mutex_unlock(&moxa_openlock);
317 mutex_unlock(&moxa_openlock);
319 } case MOXA_GET_OQUEUE:
320 status = MoxaPortTxQueue(ch);
321 ret = put_user(status, (unsigned long __user *)argp);
323 case MOXA_GET_IQUEUE:
324 status = MoxaPortRxQueue(ch);
325 ret = put_user(status, (unsigned long __user *)argp);
327 case MOXA_GETMSTATUS: {
328 struct mxser_mstatus __user *argm = argp;
329 struct mxser_mstatus tmp;
333 mutex_lock(&moxa_openlock);
334 for (i = 0; i < MAX_BOARDS; i++) {
335 p = moxa_boards[i].ports;
336 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
337 struct tty_struct *ttyp;
338 memset(&tmp, 0, sizeof(tmp));
339 if (!moxa_boards[i].ready)
342 status = MoxaPortLineStatus(p);
350 ttyp = tty_port_tty_get(&p->port);
351 if (!ttyp || !ttyp->termios)
352 tmp.cflag = p->cflag;
354 tmp.cflag = ttyp->termios->c_cflag;
357 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
358 mutex_unlock(&moxa_openlock);
363 mutex_unlock(&moxa_openlock);
367 mutex_lock(&moxa_openlock);
368 ret = moxa_get_serial_info(ch, argp);
369 mutex_unlock(&moxa_openlock);
372 mutex_lock(&moxa_openlock);
373 ret = moxa_set_serial_info(ch, argp);
374 mutex_unlock(&moxa_openlock);
382 static int moxa_break_ctl(struct tty_struct *tty, int state)
384 struct moxa_port *port = tty->driver_data;
386 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
391 static const struct tty_operations moxa_ops = {
395 .write_room = moxa_write_room,
396 .flush_buffer = moxa_flush_buffer,
397 .chars_in_buffer = moxa_chars_in_buffer,
399 .throttle = moxa_throttle,
400 .unthrottle = moxa_unthrottle,
401 .set_termios = moxa_set_termios,
404 .hangup = moxa_hangup,
405 .break_ctl = moxa_break_ctl,
406 .tiocmget = moxa_tiocmget,
407 .tiocmset = moxa_tiocmset,
410 static const struct tty_port_operations moxa_port_ops = {
411 .carrier_raised = moxa_carrier_raised,
414 static struct tty_driver *moxaDriver;
415 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
416 static DEFINE_SPINLOCK(moxa_lock);
422 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
424 switch (brd->boardType) {
425 case MOXA_BOARD_C218_ISA:
426 case MOXA_BOARD_C218_PCI:
430 case MOXA_BOARD_CP204J:
444 static int moxa_check_fw(const void *ptr)
446 const __le16 *lptr = ptr;
448 if (*lptr != cpu_to_le16(0x7980))
454 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
457 void __iomem *baseAddr = brd->basemem;
460 writeb(HW_reset, baseAddr + Control_reg); /* reset */
462 memset_io(baseAddr, 0, 4096);
463 memcpy_toio(baseAddr, buf, len); /* download BIOS */
464 writeb(0, baseAddr + Control_reg); /* restart */
468 switch (brd->boardType) {
469 case MOXA_BOARD_C218_ISA:
470 case MOXA_BOARD_C218_PCI:
471 tmp = readw(baseAddr + C218_key);
472 if (tmp != C218_KeyCode)
475 case MOXA_BOARD_CP204J:
476 tmp = readw(baseAddr + C218_key);
477 if (tmp != CP204J_KeyCode)
481 tmp = readw(baseAddr + C320_key);
482 if (tmp != C320_KeyCode)
484 tmp = readw(baseAddr + C320_status);
485 if (tmp != STS_init) {
486 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
487 "module not found\n");
495 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
499 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
502 void __iomem *baseAddr = brd->basemem;
505 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
509 writew(len - 7168 - 2, baseAddr + C320bapi_len);
510 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
511 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
512 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
513 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
518 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
521 void __iomem *baseAddr = brd->basemem;
522 const __le16 *uptr = ptr;
523 size_t wlen, len2, j;
524 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
525 unsigned int i, retry;
528 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
531 switch (brd->boardType) {
532 case MOXA_BOARD_CP204J:
533 case MOXA_BOARD_C218_ISA:
534 case MOXA_BOARD_C218_PCI:
536 loadbuf = C218_LoadBuf;
537 loadlen = C218DLoad_len;
538 checksum = C218check_sum;
539 checksum_ok = C218chksum_ok;
543 keycode = C320_KeyCode;
544 loadbuf = C320_LoadBuf;
545 loadlen = C320DLoad_len;
546 checksum = C320check_sum;
547 checksum_ok = C320chksum_ok;
553 for (i = 0; i < wlen; i++)
554 usum += le16_to_cpu(uptr[i]);
560 len2 = (wlen > 2048) ? 2048 : wlen;
562 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
565 writew(len2, baseAddr + loadlen);
566 writew(0, baseAddr + key);
567 for (i = 0; i < 100; i++) {
568 if (readw(baseAddr + key) == keycode)
572 if (readw(baseAddr + key) != keycode)
575 writew(0, baseAddr + loadlen);
576 writew(usum, baseAddr + checksum);
577 writew(0, baseAddr + key);
578 for (i = 0; i < 100; i++) {
579 if (readw(baseAddr + key) == keycode)
584 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
585 if (readb(baseAddr + checksum_ok) != 1)
588 writew(0, baseAddr + key);
589 for (i = 0; i < 600; i++) {
590 if (readw(baseAddr + Magic_no) == Magic_code)
594 if (readw(baseAddr + Magic_no) != Magic_code)
597 if (MOXA_IS_320(brd)) {
598 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
599 writew(0x3800, baseAddr + TMS320_PORT1);
600 writew(0x3900, baseAddr + TMS320_PORT2);
601 writew(28499, baseAddr + TMS320_CLOCK);
603 writew(0x3200, baseAddr + TMS320_PORT1);
604 writew(0x3400, baseAddr + TMS320_PORT2);
605 writew(19999, baseAddr + TMS320_CLOCK);
608 writew(1, baseAddr + Disable_IRQ);
609 writew(0, baseAddr + Magic_no);
610 for (i = 0; i < 500; i++) {
611 if (readw(baseAddr + Magic_no) == Magic_code)
615 if (readw(baseAddr + Magic_no) != Magic_code)
618 if (MOXA_IS_320(brd)) {
619 j = readw(baseAddr + Module_cnt);
622 brd->numPorts = j * 8;
623 writew(j, baseAddr + Module_no);
624 writew(0, baseAddr + Magic_no);
625 for (i = 0; i < 600; i++) {
626 if (readw(baseAddr + Magic_no) == Magic_code)
630 if (readw(baseAddr + Magic_no) != Magic_code)
633 brd->intNdx = baseAddr + IRQindex;
634 brd->intPend = baseAddr + IRQpending;
635 brd->intTable = baseAddr + IRQtable;
640 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
643 void __iomem *ofsAddr, *baseAddr = brd->basemem;
644 struct moxa_port *port;
648 printk(KERN_ERR "MOXA: bios length is not even\n");
652 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
656 switch (brd->boardType) {
657 case MOXA_BOARD_C218_ISA:
658 case MOXA_BOARD_C218_PCI:
659 case MOXA_BOARD_CP204J:
661 for (i = 0; i < brd->numPorts; i++, port++) {
664 port->tableAddr = baseAddr + Extern_table +
666 ofsAddr = port->tableAddr;
667 writew(C218rx_mask, ofsAddr + RX_mask);
668 writew(C218tx_mask, ofsAddr + TX_mask);
669 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
670 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
672 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
673 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
679 for (i = 0; i < brd->numPorts; i++, port++) {
682 port->tableAddr = baseAddr + Extern_table +
684 ofsAddr = port->tableAddr;
685 switch (brd->numPorts) {
687 writew(C320p8rx_mask, ofsAddr + RX_mask);
688 writew(C320p8tx_mask, ofsAddr + TX_mask);
689 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
690 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
691 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
692 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
696 writew(C320p16rx_mask, ofsAddr + RX_mask);
697 writew(C320p16tx_mask, ofsAddr + TX_mask);
698 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
699 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
700 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
701 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
705 writew(C320p24rx_mask, ofsAddr + RX_mask);
706 writew(C320p24tx_mask, ofsAddr + TX_mask);
707 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
708 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
709 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
710 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
713 writew(C320p32rx_mask, ofsAddr + RX_mask);
714 writew(C320p32tx_mask, ofsAddr + TX_mask);
715 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
716 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
717 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
718 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
719 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
728 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
730 const void *ptr = fw->data;
734 unsigned int a, lenp, lencnt;
737 __le32 magic; /* 0x34303430 */
739 u8 type; /* UNIX = 3 */
740 u8 model; /* C218T=1, C320T=2, CP204=3 */
745 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
747 if (fw->size < MOXA_FW_HDRLEN) {
748 strcpy(rsn, "too short (even header won't fit)");
751 if (hdr->magic != cpu_to_le32(0x30343034)) {
752 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
755 if (hdr->type != 3) {
756 sprintf(rsn, "not for linux, type is %u", hdr->type);
759 if (moxa_check_fw_model(brd, hdr->model)) {
760 sprintf(rsn, "not for this card, model is %u", hdr->model);
764 len = MOXA_FW_HDRLEN;
765 lencnt = hdr->model == 2 ? 5 : 3;
766 for (a = 0; a < ARRAY_SIZE(lens); a++) {
767 lens[a] = le16_to_cpu(hdr->len[a]);
768 if (lens[a] && len + lens[a] <= fw->size &&
769 moxa_check_fw(&fw->data[len]))
770 printk(KERN_WARNING "MOXA firmware: unexpected input "
771 "at offset %u, but going on\n", (u32)len);
772 if (!lens[a] && a < lencnt) {
773 sprintf(rsn, "too few entries in fw file");
779 if (len != fw->size) {
780 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
785 ptr += MOXA_FW_HDRLEN;
788 strcpy(rsn, "read above");
790 ret = moxa_load_bios(brd, ptr, lens[lenp]);
794 /* we skip the tty section (lens[1]), since we don't need it */
795 ptr += lens[lenp] + lens[lenp + 1];
796 lenp += 2; /* comm */
798 if (hdr->model == 2) {
799 ret = moxa_load_320b(brd, ptr, lens[lenp]);
802 /* skip another tty */
803 ptr += lens[lenp] + lens[lenp + 1];
807 ret = moxa_load_code(brd, ptr, lens[lenp]);
813 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
817 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
819 const struct firmware *fw;
825 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
827 if (brd->ports == NULL) {
828 printk(KERN_ERR "cannot allocate memory for ports\n");
833 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
834 tty_port_init(&p->port);
835 p->port.ops = &moxa_port_ops;
836 p->type = PORT_16550A;
837 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
840 switch (brd->boardType) {
841 case MOXA_BOARD_C218_ISA:
842 case MOXA_BOARD_C218_PCI:
843 file = "c218tunx.cod";
845 case MOXA_BOARD_CP204J:
846 file = "cp204unx.cod";
849 file = "c320tunx.cod";
853 ret = request_firmware(&fw, file, dev);
855 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
856 "you've placed '%s' file into your firmware "
857 "loader directory (e.g. /lib/firmware)\n",
862 ret = moxa_load_fw(brd, fw);
864 release_firmware(fw);
869 spin_lock_bh(&moxa_lock);
871 if (!timer_pending(&moxaTimer))
872 mod_timer(&moxaTimer, jiffies + HZ / 50);
873 spin_unlock_bh(&moxa_lock);
882 static void moxa_board_deinit(struct moxa_board_conf *brd)
884 unsigned int a, opened;
886 mutex_lock(&moxa_openlock);
887 spin_lock_bh(&moxa_lock);
889 spin_unlock_bh(&moxa_lock);
891 /* pci hot-un-plug support */
892 for (a = 0; a < brd->numPorts; a++)
893 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
894 struct tty_struct *tty = tty_port_tty_get(
895 &brd->ports[a].port);
903 for (a = 0; a < brd->numPorts; a++)
904 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
906 mutex_unlock(&moxa_openlock);
910 mutex_lock(&moxa_openlock);
913 iounmap(brd->basemem);
919 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
920 const struct pci_device_id *ent)
922 struct moxa_board_conf *board;
924 int board_type = ent->driver_data;
927 retval = pci_enable_device(pdev);
929 dev_err(&pdev->dev, "can't enable pci device\n");
933 for (i = 0; i < MAX_BOARDS; i++)
934 if (moxa_boards[i].basemem == NULL)
938 if (i >= MAX_BOARDS) {
939 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
940 "found. Board is ignored.\n", MAX_BOARDS);
944 board = &moxa_boards[i];
946 retval = pci_request_region(pdev, 2, "moxa-base");
948 dev_err(&pdev->dev, "can't request pci region 2\n");
952 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
953 if (board->basemem == NULL) {
954 dev_err(&pdev->dev, "can't remap io space 2\n");
958 board->boardType = board_type;
959 switch (board_type) {
960 case MOXA_BOARD_C218_ISA:
961 case MOXA_BOARD_C218_PCI:
965 case MOXA_BOARD_CP204J:
972 board->busType = MOXA_BUS_TYPE_PCI;
974 retval = moxa_init_board(board, &pdev->dev);
978 pci_set_drvdata(pdev, board);
980 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
981 moxa_brdname[board_type - 1], board->numPorts);
985 iounmap(board->basemem);
986 board->basemem = NULL;
988 pci_release_region(pdev, 2);
993 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
995 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
997 moxa_board_deinit(brd);
999 pci_release_region(pdev, 2);
1002 static struct pci_driver moxa_pci_driver = {
1004 .id_table = moxa_pcibrds,
1005 .probe = moxa_pci_probe,
1006 .remove = __devexit_p(moxa_pci_remove)
1008 #endif /* CONFIG_PCI */
1010 static int __init moxa_init(void)
1012 unsigned int isabrds = 0;
1015 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1017 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1021 moxaDriver->owner = THIS_MODULE;
1022 moxaDriver->name = "ttyMX";
1023 moxaDriver->major = ttymajor;
1024 moxaDriver->minor_start = 0;
1025 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1026 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1027 moxaDriver->init_termios = tty_std_termios;
1028 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1029 moxaDriver->init_termios.c_ispeed = 9600;
1030 moxaDriver->init_termios.c_ospeed = 9600;
1031 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1032 tty_set_operations(moxaDriver, &moxa_ops);
1034 if (tty_register_driver(moxaDriver)) {
1035 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1036 put_tty_driver(moxaDriver);
1040 /* Find the boards defined from module args. */
1043 struct moxa_board_conf *brd = moxa_boards;
1045 for (i = 0; i < MAX_BOARDS; i++) {
1048 if (type[i] == MOXA_BOARD_C218_ISA ||
1049 type[i] == MOXA_BOARD_C320_ISA) {
1050 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1051 isabrds + 1, moxa_brdname[type[i] - 1],
1053 brd->boardType = type[i];
1054 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1056 brd->busType = MOXA_BUS_TYPE_ISA;
1057 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1058 if (!brd->basemem) {
1059 printk(KERN_ERR "MOXA: can't remap %lx\n",
1063 if (moxa_init_board(brd, NULL)) {
1064 iounmap(brd->basemem);
1065 brd->basemem = NULL;
1069 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1070 "ready (%u ports, firmware loaded)\n",
1071 baseaddr[i], brd->numPorts);
1081 retval = pci_register_driver(&moxa_pci_driver);
1083 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1092 static void __exit moxa_exit(void)
1097 pci_unregister_driver(&moxa_pci_driver);
1100 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1101 if (moxa_boards[i].ready)
1102 moxa_board_deinit(&moxa_boards[i]);
1104 del_timer_sync(&moxaTimer);
1106 if (tty_unregister_driver(moxaDriver))
1107 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1109 put_tty_driver(moxaDriver);
1112 module_init(moxa_init);
1113 module_exit(moxa_exit);
1115 static void moxa_close_port(struct tty_struct *tty)
1117 struct moxa_port *ch = tty->driver_data;
1118 moxa_shut_down(tty);
1119 MoxaPortFlushData(ch, 2);
1120 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1121 tty->driver_data = NULL;
1122 tty_port_tty_set(&ch->port, NULL);
1125 static int moxa_carrier_raised(struct tty_port *port)
1127 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1130 spin_lock_bh(&moxa_lock);
1132 spin_unlock_bh(&moxa_lock);
1136 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1137 struct moxa_port *ch)
1139 struct tty_port *port = &ch->port;
1145 prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
1146 if (tty_hung_up_p(filp)) {
1147 #ifdef SERIAL_DO_RESTART
1148 retval = -ERESTARTSYS;
1154 dcd = tty_port_carrier_raised(port);
1158 if (signal_pending(current)) {
1159 retval = -ERESTARTSYS;
1164 finish_wait(&port->open_wait, &wait);
1169 static int moxa_open(struct tty_struct *tty, struct file *filp)
1171 struct moxa_board_conf *brd;
1172 struct moxa_port *ch;
1177 if (port == MAX_PORTS) {
1178 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1180 if (mutex_lock_interruptible(&moxa_openlock))
1181 return -ERESTARTSYS;
1182 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1184 mutex_unlock(&moxa_openlock);
1188 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1189 mutex_unlock(&moxa_openlock);
1193 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1195 tty->driver_data = ch;
1196 tty_port_tty_set(&ch->port, tty);
1197 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1198 ch->statusflags = 0;
1199 moxa_set_tty_param(tty, tty->termios);
1200 MoxaPortLineCtrl(ch, 1, 1);
1202 MoxaSetFifo(ch, ch->type == PORT_16550A);
1203 ch->port.flags |= ASYNC_INITIALIZED;
1205 mutex_unlock(&moxa_openlock);
1208 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1209 retval = moxa_block_till_ready(tty, filp, ch);
1210 mutex_lock(&moxa_openlock);
1212 if (ch->port.count) /* 0 means already hung up... */
1213 if (--ch->port.count == 0)
1214 moxa_close_port(tty);
1216 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
1217 mutex_unlock(&moxa_openlock);
1222 static void moxa_close(struct tty_struct *tty, struct file *filp)
1224 struct moxa_port *ch;
1228 if (port == MAX_PORTS || tty_hung_up_p(filp))
1231 mutex_lock(&moxa_openlock);
1232 ch = tty->driver_data;
1235 if (tty->count == 1 && ch->port.count != 1) {
1236 printk(KERN_WARNING "moxa_close: bad serial port count; "
1237 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1240 if (--ch->port.count < 0) {
1241 printk(KERN_WARNING "moxa_close: bad serial port count, "
1242 "device=%s\n", tty->name);
1248 ch->cflag = tty->termios->c_cflag;
1249 if (ch->port.flags & ASYNC_INITIALIZED) {
1250 moxa_setup_empty_event(tty);
1251 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1254 moxa_close_port(tty);
1256 mutex_unlock(&moxa_openlock);
1259 static int moxa_write(struct tty_struct *tty,
1260 const unsigned char *buf, int count)
1262 struct moxa_port *ch = tty->driver_data;
1268 spin_lock_bh(&moxa_lock);
1269 len = MoxaPortWriteData(tty, buf, count);
1270 spin_unlock_bh(&moxa_lock);
1272 ch->statusflags |= LOWWAIT;
1276 static int moxa_write_room(struct tty_struct *tty)
1278 struct moxa_port *ch;
1282 ch = tty->driver_data;
1285 return MoxaPortTxFree(ch);
1288 static void moxa_flush_buffer(struct tty_struct *tty)
1290 struct moxa_port *ch = tty->driver_data;
1294 MoxaPortFlushData(ch, 1);
1298 static int moxa_chars_in_buffer(struct tty_struct *tty)
1300 struct moxa_port *ch = tty->driver_data;
1304 * Sigh...I have to check if driver_data is NULL here, because
1305 * if an open() fails, the TTY subsystem eventually calls
1306 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1307 * routine. And since the open() failed, we return 0 here. TDJ
1312 chars = MoxaPortTxQueue(ch);
1315 * Make it possible to wakeup anything waiting for output
1316 * in tty_ioctl.c, etc.
1318 if (!(ch->statusflags & EMPTYWAIT))
1319 moxa_setup_empty_event(tty);
1325 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1327 struct moxa_port *ch;
1328 int flag = 0, dtr, rts;
1330 mutex_lock(&moxa_openlock);
1331 ch = tty->driver_data;
1333 mutex_unlock(&moxa_openlock);
1337 MoxaPortGetLineOut(ch, &dtr, &rts);
1342 dtr = MoxaPortLineStatus(ch);
1349 mutex_unlock(&moxa_openlock);
1353 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1354 unsigned int set, unsigned int clear)
1356 struct moxa_port *ch;
1361 mutex_lock(&moxa_openlock);
1362 ch = tty->driver_data;
1364 mutex_unlock(&moxa_openlock);
1368 MoxaPortGetLineOut(ch, &dtr, &rts);
1369 if (set & TIOCM_RTS)
1371 if (set & TIOCM_DTR)
1373 if (clear & TIOCM_RTS)
1375 if (clear & TIOCM_DTR)
1377 MoxaPortLineCtrl(ch, dtr, rts);
1378 mutex_unlock(&moxa_openlock);
1382 static void moxa_throttle(struct tty_struct *tty)
1384 struct moxa_port *ch = tty->driver_data;
1386 ch->statusflags |= THROTTLE;
1389 static void moxa_unthrottle(struct tty_struct *tty)
1391 struct moxa_port *ch = tty->driver_data;
1393 ch->statusflags &= ~THROTTLE;
1396 static void moxa_set_termios(struct tty_struct *tty,
1397 struct ktermios *old_termios)
1399 struct moxa_port *ch = tty->driver_data;
1403 moxa_set_tty_param(tty, old_termios);
1404 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1405 wake_up_interruptible(&ch->port.open_wait);
1408 static void moxa_stop(struct tty_struct *tty)
1410 struct moxa_port *ch = tty->driver_data;
1414 MoxaPortTxDisable(ch);
1415 ch->statusflags |= TXSTOPPED;
1419 static void moxa_start(struct tty_struct *tty)
1421 struct moxa_port *ch = tty->driver_data;
1426 if (!(ch->statusflags & TXSTOPPED))
1429 MoxaPortTxEnable(ch);
1430 ch->statusflags &= ~TXSTOPPED;
1433 static void moxa_hangup(struct tty_struct *tty)
1435 struct moxa_port *ch;
1437 mutex_lock(&moxa_openlock);
1438 ch = tty->driver_data;
1440 mutex_unlock(&moxa_openlock);
1444 moxa_close_port(tty);
1445 mutex_unlock(&moxa_openlock);
1447 wake_up_interruptible(&ch->port.open_wait);
1450 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1452 struct tty_struct *tty;
1455 if (dcd != p->DCDState) {
1456 tty = tty_port_tty_get(&p->port);
1457 if (tty && C_CLOCAL(tty) && !dcd)
1464 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1467 struct tty_struct *tty = tty_port_tty_get(&p->port);
1468 void __iomem *ofsAddr;
1469 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1473 if ((p->statusflags & EMPTYWAIT) &&
1474 MoxaPortTxQueue(p) == 0) {
1475 p->statusflags &= ~EMPTYWAIT;
1478 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1479 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1480 p->statusflags &= ~LOWWAIT;
1484 if (inited && !(p->statusflags & THROTTLE) &&
1485 MoxaPortRxQueue(p) > 0) { /* RX */
1486 MoxaPortReadData(p);
1487 tty_schedule_flip(tty);
1490 p->statusflags &= ~EMPTYWAIT;
1491 MoxaPortFlushData(p, 0); /* flush RX */
1494 if (!handle) /* nothing else to do */
1497 intr = readw(ip); /* port irq status */
1501 writew(0, ip); /* ACK port */
1502 ofsAddr = p->tableAddr;
1503 if (intr & IntrTx) /* disable tx intr */
1504 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1505 ofsAddr + HostStat);
1510 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1511 tty_insert_flip_char(tty, 0, TTY_BREAK);
1512 tty_schedule_flip(tty);
1515 if (intr & IntrLine)
1516 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1523 static void moxa_poll(unsigned long ignored)
1525 struct moxa_board_conf *brd;
1527 unsigned int card, port, served = 0;
1529 spin_lock(&moxa_lock);
1530 for (card = 0; card < MAX_BOARDS; card++) {
1531 brd = &moxa_boards[card];
1538 if (readb(brd->intPend) == 0xff)
1539 ip = brd->intTable + readb(brd->intNdx);
1541 for (port = 0; port < brd->numPorts; port++)
1542 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1545 writeb(0, brd->intPend); /* ACK */
1547 if (moxaLowWaterChk) {
1548 struct moxa_port *p = brd->ports;
1549 for (port = 0; port < brd->numPorts; port++, p++)
1550 if (p->lowChkFlag) {
1552 moxa_low_water_check(p->tableAddr);
1556 moxaLowWaterChk = 0;
1559 mod_timer(&moxaTimer, jiffies + HZ / 50);
1560 spin_unlock(&moxa_lock);
1563 /******************************************************************************/
1565 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1567 register struct ktermios *ts = tty->termios;
1568 struct moxa_port *ch = tty->driver_data;
1569 int rts, cts, txflow, rxflow, xany, baud;
1571 rts = cts = txflow = rxflow = xany = 0;
1572 if (ts->c_cflag & CRTSCTS)
1574 if (ts->c_iflag & IXON)
1576 if (ts->c_iflag & IXOFF)
1578 if (ts->c_iflag & IXANY)
1581 /* Clear the features we don't support */
1582 ts->c_cflag &= ~CMSPAR;
1583 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1584 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1586 baud = tty_termios_baud_rate(old_termios);
1587 /* Not put the baud rate into the termios data */
1588 tty_encode_baud_rate(tty, baud, baud);
1591 static void moxa_setup_empty_event(struct tty_struct *tty)
1593 struct moxa_port *ch = tty->driver_data;
1595 spin_lock_bh(&moxa_lock);
1596 ch->statusflags |= EMPTYWAIT;
1597 spin_unlock_bh(&moxa_lock);
1600 static void moxa_shut_down(struct tty_struct *tty)
1602 struct moxa_port *ch = tty->driver_data;
1604 if (!(ch->port.flags & ASYNC_INITIALIZED))
1607 MoxaPortDisable(ch);
1610 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1613 MoxaPortLineCtrl(ch, 0, 0);
1615 spin_lock_bh(&moxa_lock);
1616 ch->port.flags &= ~ASYNC_INITIALIZED;
1617 spin_unlock_bh(&moxa_lock);
1620 /*****************************************************************************
1621 * Driver level functions: *
1622 *****************************************************************************/
1624 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1626 void __iomem *ofsAddr;
1627 if (mode < 0 || mode > 2)
1629 ofsAddr = port->tableAddr;
1630 moxafunc(ofsAddr, FC_FlushQueue, mode);
1632 port->lowChkFlag = 0;
1633 moxa_low_water_check(ofsAddr);
1638 * Moxa Port Number Description:
1640 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1641 * the port number using in MOXA driver functions will be 0 to 31 for
1642 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1643 * to 127 for fourth. For example, if you setup three MOXA boards,
1644 * first board is C218, second board is C320-16 and third board is
1645 * C320-32. The port number of first board (C218 - 8 ports) is from
1646 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1647 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1648 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1649 * 127 will be invalid.
1652 * Moxa Functions Description:
1654 * Function 1: Driver initialization routine, this routine must be
1655 * called when initialized driver.
1657 * void MoxaDriverInit();
1660 * Function 2: Moxa driver private IOCTL command processing.
1662 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1664 * unsigned int cmd : IOCTL command
1665 * unsigned long arg : IOCTL argument
1666 * int port : port number (0 - 127)
1673 * Function 6: Enable this port to start Tx/Rx data.
1675 * void MoxaPortEnable(int port);
1676 * int port : port number (0 - 127)
1679 * Function 7: Disable this port
1681 * void MoxaPortDisable(int port);
1682 * int port : port number (0 - 127)
1685 * Function 10: Setting baud rate of this port.
1687 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1688 * int port : port number (0 - 127)
1689 * long baud : baud rate (50 - 115200)
1691 * return: 0 : this port is invalid or baud < 50
1692 * 50 - 115200 : the real baud rate set to the port, if
1693 * the argument baud is large than maximun
1694 * available baud rate, the real setting
1695 * baud rate will be the maximun baud rate.
1698 * Function 12: Configure the port.
1700 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1701 * int port : port number (0 - 127)
1702 * struct ktermios * termio : termio structure pointer
1703 * speed_t baud : baud rate
1705 * return: -1 : this port is invalid or termio == NULL
1709 * Function 13: Get the DTR/RTS state of this port.
1711 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1712 * int port : port number (0 - 127)
1713 * int * dtrState : pointer to INT to receive the current DTR
1714 * state. (if NULL, this function will not
1715 * write to this address)
1716 * int * rtsState : pointer to INT to receive the current RTS
1717 * state. (if NULL, this function will not
1718 * write to this address)
1720 * return: -1 : this port is invalid
1724 * Function 14: Setting the DTR/RTS output state of this port.
1726 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1727 * int port : port number (0 - 127)
1728 * int dtrState : DTR output state (0: off, 1: on)
1729 * int rtsState : RTS output state (0: off, 1: on)
1732 * Function 15: Setting the flow control of this port.
1734 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1735 * int txFlow,int xany);
1736 * int port : port number (0 - 127)
1737 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1738 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1739 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1740 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1741 * int xany : S/W XANY flow control (0: no, 1: yes)
1744 * Function 16: Get ths line status of this port
1746 * int MoxaPortLineStatus(int port);
1747 * int port : port number (0 - 127)
1749 * return: Bit 0 - CTS state (0: off, 1: on)
1750 * Bit 1 - DSR state (0: off, 1: on)
1751 * Bit 2 - DCD state (0: off, 1: on)
1754 * Function 19: Flush the Rx/Tx buffer data of this port.
1756 * void MoxaPortFlushData(int port, int mode);
1757 * int port : port number (0 - 127)
1759 * 0 : flush the Rx buffer
1760 * 1 : flush the Tx buffer
1761 * 2 : flush the Rx and Tx buffer
1764 * Function 20: Write data.
1766 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1767 * int port : port number (0 - 127)
1768 * unsigned char * buffer : pointer to write data buffer.
1769 * int length : write data length
1771 * return: 0 - length : real write data length
1774 * Function 21: Read data.
1776 * int MoxaPortReadData(int port, struct tty_struct *tty);
1777 * int port : port number (0 - 127)
1778 * struct tty_struct *tty : tty for data
1780 * return: 0 - length : real read data length
1783 * Function 24: Get the Tx buffer current queued data bytes
1785 * int MoxaPortTxQueue(int port);
1786 * int port : port number (0 - 127)
1788 * return: .. : Tx buffer current queued data bytes
1791 * Function 25: Get the Tx buffer current free space
1793 * int MoxaPortTxFree(int port);
1794 * int port : port number (0 - 127)
1796 * return: .. : Tx buffer current free space
1799 * Function 26: Get the Rx buffer current queued data bytes
1801 * int MoxaPortRxQueue(int port);
1802 * int port : port number (0 - 127)
1804 * return: .. : Rx buffer current queued data bytes
1807 * Function 28: Disable port data transmission.
1809 * void MoxaPortTxDisable(int port);
1810 * int port : port number (0 - 127)
1813 * Function 29: Enable port data transmission.
1815 * void MoxaPortTxEnable(int port);
1816 * int port : port number (0 - 127)
1819 * Function 31: Get the received BREAK signal count and reset it.
1821 * int MoxaPortResetBrkCnt(int port);
1822 * int port : port number (0 - 127)
1824 * return: 0 - .. : BREAK signal count
1829 static void MoxaPortEnable(struct moxa_port *port)
1831 void __iomem *ofsAddr;
1834 ofsAddr = port->tableAddr;
1835 writew(lowwater, ofsAddr + Low_water);
1836 if (MOXA_IS_320(port->board))
1837 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1839 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1840 ofsAddr + HostStat);
1842 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1843 moxafunc(ofsAddr, FC_FlushQueue, 2);
1845 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1846 MoxaPortLineStatus(port);
1849 static void MoxaPortDisable(struct moxa_port *port)
1851 void __iomem *ofsAddr = port->tableAddr;
1853 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1854 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1855 writew(0, ofsAddr + HostStat);
1856 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1859 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1861 void __iomem *ofsAddr = port->tableAddr;
1862 unsigned int clock, val;
1865 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1872 moxafunc(ofsAddr, FC_SetBaud, val);
1877 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1880 void __iomem *ofsAddr;
1884 ofsAddr = port->tableAddr;
1885 cflag = termio->c_cflag; /* termio->c_cflag */
1887 mode = termio->c_cflag & CSIZE;
1890 else if (mode == CS6)
1892 else if (mode == CS7)
1894 else if (mode == CS8)
1897 if (termio->c_cflag & CSTOPB) {
1905 if (termio->c_cflag & PARENB) {
1906 if (termio->c_cflag & PARODD)
1913 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1915 if (MOXA_IS_320(port->board) && baud >= 921600)
1918 baud = MoxaPortSetBaud(port, baud);
1920 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1921 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1922 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1923 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1924 moxa_wait_finish(ofsAddr);
1930 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1934 *dtrState = !!(port->lineCtrl & DTR_ON);
1936 *rtsState = !!(port->lineCtrl & RTS_ON);
1941 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1949 port->lineCtrl = mode;
1950 moxafunc(port->tableAddr, FC_LineControl, mode);
1953 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1954 int txflow, int rxflow, int txany)
1959 mode |= RTS_FlowCtl;
1961 mode |= CTS_FlowCtl;
1968 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1971 static int MoxaPortLineStatus(struct moxa_port *port)
1973 void __iomem *ofsAddr;
1976 ofsAddr = port->tableAddr;
1977 if (MOXA_IS_320(port->board)) {
1978 moxafunc(ofsAddr, FC_LineStatus, 0);
1979 val = readw(ofsAddr + FuncArg);
1981 val = readw(ofsAddr + FlagStat) >> 4;
1986 spin_lock_bh(&moxa_lock);
1987 moxa_new_dcdstate(port, val & 8);
1988 spin_unlock_bh(&moxa_lock);
1993 static int MoxaPortWriteData(struct tty_struct *tty,
1994 const unsigned char *buffer, int len)
1996 struct moxa_port *port = tty->driver_data;
1997 void __iomem *baseAddr, *ofsAddr, *ofs;
1998 unsigned int c, total;
1999 u16 head, tail, tx_mask, spage, epage;
2000 u16 pageno, pageofs, bufhead;
2002 ofsAddr = port->tableAddr;
2003 baseAddr = port->board->basemem;
2004 tx_mask = readw(ofsAddr + TX_mask);
2005 spage = readw(ofsAddr + Page_txb);
2006 epage = readw(ofsAddr + EndPage_txb);
2007 tail = readw(ofsAddr + TXwptr);
2008 head = readw(ofsAddr + TXrptr);
2009 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
2012 moxaLog.txcnt[port->port.tty->index] += c;
2014 if (spage == epage) {
2015 bufhead = readw(ofsAddr + Ofs_txb);
2016 writew(spage, baseAddr + Control_reg);
2019 len = head - tail - 1;
2021 len = tx_mask + 1 - tail;
2022 len = (c > len) ? len : c;
2023 ofs = baseAddr + DynPage_addr + bufhead + tail;
2024 memcpy_toio(ofs, buffer, len);
2026 tail = (tail + len) & tx_mask;
2030 pageno = spage + (tail >> 13);
2031 pageofs = tail & Page_mask;
2033 len = Page_size - pageofs;
2036 writeb(pageno, baseAddr + Control_reg);
2037 ofs = baseAddr + DynPage_addr + pageofs;
2038 memcpy_toio(ofs, buffer, len);
2040 if (++pageno == epage)
2045 tail = (tail + total) & tx_mask;
2047 writew(tail, ofsAddr + TXwptr);
2048 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2052 static int MoxaPortReadData(struct moxa_port *port)
2054 struct tty_struct *tty = port->port.tty;
2056 void __iomem *baseAddr, *ofsAddr, *ofs;
2057 unsigned int count, len, total;
2058 u16 tail, rx_mask, spage, epage;
2059 u16 pageno, pageofs, bufhead, head;
2061 ofsAddr = port->tableAddr;
2062 baseAddr = port->board->basemem;
2063 head = readw(ofsAddr + RXrptr);
2064 tail = readw(ofsAddr + RXwptr);
2065 rx_mask = readw(ofsAddr + RX_mask);
2066 spage = readw(ofsAddr + Page_rxb);
2067 epage = readw(ofsAddr + EndPage_rxb);
2068 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
2073 moxaLog.rxcnt[tty->index] += total;
2074 if (spage == epage) {
2075 bufhead = readw(ofsAddr + Ofs_rxb);
2076 writew(spage, baseAddr + Control_reg);
2078 ofs = baseAddr + DynPage_addr + bufhead + head;
2079 len = (tail >= head) ? (tail - head) :
2080 (rx_mask + 1 - head);
2081 len = tty_prepare_flip_string(tty, &dst,
2083 memcpy_fromio(dst, ofs, len);
2084 head = (head + len) & rx_mask;
2088 pageno = spage + (head >> 13);
2089 pageofs = head & Page_mask;
2091 writew(pageno, baseAddr + Control_reg);
2092 ofs = baseAddr + DynPage_addr + pageofs;
2093 len = tty_prepare_flip_string(tty, &dst,
2094 min(Page_size - pageofs, count));
2095 memcpy_fromio(dst, ofs, len);
2098 pageofs = (pageofs + len) & Page_mask;
2099 if (pageofs == 0 && ++pageno == epage)
2102 head = (head + total) & rx_mask;
2104 writew(head, ofsAddr + RXrptr);
2105 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2106 moxaLowWaterChk = 1;
2107 port->lowChkFlag = 1;
2113 static int MoxaPortTxQueue(struct moxa_port *port)
2115 void __iomem *ofsAddr = port->tableAddr;
2116 u16 rptr, wptr, mask;
2118 rptr = readw(ofsAddr + TXrptr);
2119 wptr = readw(ofsAddr + TXwptr);
2120 mask = readw(ofsAddr + TX_mask);
2121 return (wptr - rptr) & mask;
2124 static int MoxaPortTxFree(struct moxa_port *port)
2126 void __iomem *ofsAddr = port->tableAddr;
2127 u16 rptr, wptr, mask;
2129 rptr = readw(ofsAddr + TXrptr);
2130 wptr = readw(ofsAddr + TXwptr);
2131 mask = readw(ofsAddr + TX_mask);
2132 return mask - ((wptr - rptr) & mask);
2135 static int MoxaPortRxQueue(struct moxa_port *port)
2137 void __iomem *ofsAddr = port->tableAddr;
2138 u16 rptr, wptr, mask;
2140 rptr = readw(ofsAddr + RXrptr);
2141 wptr = readw(ofsAddr + RXwptr);
2142 mask = readw(ofsAddr + RX_mask);
2143 return (wptr - rptr) & mask;
2146 static void MoxaPortTxDisable(struct moxa_port *port)
2148 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2151 static void MoxaPortTxEnable(struct moxa_port *port)
2153 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2156 static int moxa_get_serial_info(struct moxa_port *info,
2157 struct serial_struct __user *retinfo)
2159 struct serial_struct tmp = {
2161 .line = info->port.tty->index,
2162 .flags = info->port.flags,
2163 .baud_base = 921600,
2164 .close_delay = info->port.close_delay
2166 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2170 static int moxa_set_serial_info(struct moxa_port *info,
2171 struct serial_struct __user *new_info)
2173 struct serial_struct new_serial;
2175 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2178 if (new_serial.irq != 0 || new_serial.port != 0 ||
2179 new_serial.custom_divisor != 0 ||
2180 new_serial.baud_base != 921600)
2183 if (!capable(CAP_SYS_ADMIN)) {
2184 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2185 (info->port.flags & ~ASYNC_USR_MASK)))
2188 info->port.close_delay = new_serial.close_delay * HZ / 100;
2190 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2191 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2193 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2195 info->type = new_serial.type;
2201 /*****************************************************************************
2202 * Static local functions: *
2203 *****************************************************************************/
2205 static void MoxaSetFifo(struct moxa_port *port, int enable)
2207 void __iomem *ofsAddr = port->tableAddr;
2210 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2211 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2213 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2214 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);