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_shutdown(struct tty_port *);
210 static int moxa_carrier_raised(struct tty_port *);
211 static void moxa_dtr_rts(struct tty_port *, int);
213 * moxa board interface functions:
215 static void MoxaPortEnable(struct moxa_port *);
216 static void MoxaPortDisable(struct moxa_port *);
217 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
218 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
219 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
220 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
221 static int MoxaPortLineStatus(struct moxa_port *);
222 static void MoxaPortFlushData(struct moxa_port *, int);
223 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
224 static int MoxaPortReadData(struct moxa_port *);
225 static int MoxaPortTxQueue(struct moxa_port *);
226 static int MoxaPortRxQueue(struct moxa_port *);
227 static int MoxaPortTxFree(struct moxa_port *);
228 static void MoxaPortTxDisable(struct moxa_port *);
229 static void MoxaPortTxEnable(struct moxa_port *);
230 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
231 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
232 static void MoxaSetFifo(struct moxa_port *port, int enable);
238 static void moxa_wait_finish(void __iomem *ofsAddr)
240 unsigned long end = jiffies + moxaFuncTout;
242 while (readw(ofsAddr + FuncCode) != 0)
243 if (time_after(jiffies, end))
245 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
246 printk(KERN_WARNING "moxa function expired\n");
249 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
252 spin_lock_irqsave(&moxafunc_lock, flags);
253 writew(arg, ofsAddr + FuncArg);
254 writew(cmd, ofsAddr + FuncCode);
255 moxa_wait_finish(ofsAddr);
256 spin_unlock_irqrestore(&moxafunc_lock, flags);
259 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
263 spin_lock_irqsave(&moxafunc_lock, flags);
264 writew(arg, ofsAddr + FuncArg);
265 writew(cmd, ofsAddr + FuncCode);
266 moxa_wait_finish(ofsAddr);
267 ret = readw(ofsAddr + FuncArg);
268 spin_unlock_irqrestore(&moxafunc_lock, flags);
272 static void moxa_low_water_check(void __iomem *ofsAddr)
274 u16 rptr, wptr, mask, len;
276 if (readb(ofsAddr + FlagStat) & Xoff_state) {
277 rptr = readw(ofsAddr + RXrptr);
278 wptr = readw(ofsAddr + RXwptr);
279 mask = readw(ofsAddr + RX_mask);
280 len = (wptr - rptr) & mask;
281 if (len <= Low_water)
282 moxafunc(ofsAddr, FC_SendXon, 0);
290 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
291 unsigned int cmd, unsigned long arg)
293 struct moxa_port *ch = tty->driver_data;
294 void __user *argp = (void __user *)arg;
297 if (tty->index == MAX_PORTS) {
298 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
299 cmd != MOXA_GETMSTATUS)
305 case MOXA_GETDATACOUNT:
306 moxaLog.tick = jiffies;
307 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
310 case MOXA_FLUSH_QUEUE:
311 MoxaPortFlushData(ch, arg);
313 case MOXA_GET_IOQUEUE: {
314 struct moxaq_str __user *argm = argp;
315 struct moxaq_str tmp;
319 mutex_lock(&moxa_openlock);
320 for (i = 0; i < MAX_BOARDS; i++) {
321 p = moxa_boards[i].ports;
322 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
323 memset(&tmp, 0, sizeof(tmp));
324 if (moxa_boards[i].ready) {
325 tmp.inq = MoxaPortRxQueue(p);
326 tmp.outq = MoxaPortTxQueue(p);
328 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
329 mutex_unlock(&moxa_openlock);
334 mutex_unlock(&moxa_openlock);
336 } case MOXA_GET_OQUEUE:
337 status = MoxaPortTxQueue(ch);
338 ret = put_user(status, (unsigned long __user *)argp);
340 case MOXA_GET_IQUEUE:
341 status = MoxaPortRxQueue(ch);
342 ret = put_user(status, (unsigned long __user *)argp);
344 case MOXA_GETMSTATUS: {
345 struct mxser_mstatus __user *argm = argp;
346 struct mxser_mstatus tmp;
350 mutex_lock(&moxa_openlock);
351 for (i = 0; i < MAX_BOARDS; i++) {
352 p = moxa_boards[i].ports;
353 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
354 struct tty_struct *ttyp;
355 memset(&tmp, 0, sizeof(tmp));
356 if (!moxa_boards[i].ready)
359 status = MoxaPortLineStatus(p);
367 ttyp = tty_port_tty_get(&p->port);
368 if (!ttyp || !ttyp->termios)
369 tmp.cflag = p->cflag;
371 tmp.cflag = ttyp->termios->c_cflag;
374 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
375 mutex_unlock(&moxa_openlock);
380 mutex_unlock(&moxa_openlock);
384 mutex_lock(&moxa_openlock);
385 ret = moxa_get_serial_info(ch, argp);
386 mutex_unlock(&moxa_openlock);
389 mutex_lock(&moxa_openlock);
390 ret = moxa_set_serial_info(ch, argp);
391 mutex_unlock(&moxa_openlock);
399 static int moxa_break_ctl(struct tty_struct *tty, int state)
401 struct moxa_port *port = tty->driver_data;
403 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
408 static const struct tty_operations moxa_ops = {
412 .write_room = moxa_write_room,
413 .flush_buffer = moxa_flush_buffer,
414 .chars_in_buffer = moxa_chars_in_buffer,
416 .throttle = moxa_throttle,
417 .unthrottle = moxa_unthrottle,
418 .set_termios = moxa_set_termios,
421 .hangup = moxa_hangup,
422 .break_ctl = moxa_break_ctl,
423 .tiocmget = moxa_tiocmget,
424 .tiocmset = moxa_tiocmset,
427 static const struct tty_port_operations moxa_port_ops = {
428 .carrier_raised = moxa_carrier_raised,
429 .dtr_rts = moxa_dtr_rts,
430 .shutdown = moxa_shutdown,
433 static struct tty_driver *moxaDriver;
434 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
435 static DEFINE_SPINLOCK(moxa_lock);
436 static DEFINE_SPINLOCK(moxafunc_lock);
442 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
444 switch (brd->boardType) {
445 case MOXA_BOARD_C218_ISA:
446 case MOXA_BOARD_C218_PCI:
450 case MOXA_BOARD_CP204J:
464 static int moxa_check_fw(const void *ptr)
466 const __le16 *lptr = ptr;
468 if (*lptr != cpu_to_le16(0x7980))
474 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
477 void __iomem *baseAddr = brd->basemem;
480 writeb(HW_reset, baseAddr + Control_reg); /* reset */
482 memset_io(baseAddr, 0, 4096);
483 memcpy_toio(baseAddr, buf, len); /* download BIOS */
484 writeb(0, baseAddr + Control_reg); /* restart */
488 switch (brd->boardType) {
489 case MOXA_BOARD_C218_ISA:
490 case MOXA_BOARD_C218_PCI:
491 tmp = readw(baseAddr + C218_key);
492 if (tmp != C218_KeyCode)
495 case MOXA_BOARD_CP204J:
496 tmp = readw(baseAddr + C218_key);
497 if (tmp != CP204J_KeyCode)
501 tmp = readw(baseAddr + C320_key);
502 if (tmp != C320_KeyCode)
504 tmp = readw(baseAddr + C320_status);
505 if (tmp != STS_init) {
506 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
507 "module not found\n");
515 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
519 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
522 void __iomem *baseAddr = brd->basemem;
525 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
529 writew(len - 7168 - 2, baseAddr + C320bapi_len);
530 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
531 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
532 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
533 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
538 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
541 void __iomem *baseAddr = brd->basemem;
542 const __le16 *uptr = ptr;
543 size_t wlen, len2, j;
544 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
545 unsigned int i, retry;
548 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
551 switch (brd->boardType) {
552 case MOXA_BOARD_CP204J:
553 case MOXA_BOARD_C218_ISA:
554 case MOXA_BOARD_C218_PCI:
556 loadbuf = C218_LoadBuf;
557 loadlen = C218DLoad_len;
558 checksum = C218check_sum;
559 checksum_ok = C218chksum_ok;
563 keycode = C320_KeyCode;
564 loadbuf = C320_LoadBuf;
565 loadlen = C320DLoad_len;
566 checksum = C320check_sum;
567 checksum_ok = C320chksum_ok;
573 for (i = 0; i < wlen; i++)
574 usum += le16_to_cpu(uptr[i]);
580 len2 = (wlen > 2048) ? 2048 : wlen;
582 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
585 writew(len2, baseAddr + loadlen);
586 writew(0, baseAddr + key);
587 for (i = 0; i < 100; i++) {
588 if (readw(baseAddr + key) == keycode)
592 if (readw(baseAddr + key) != keycode)
595 writew(0, baseAddr + loadlen);
596 writew(usum, baseAddr + checksum);
597 writew(0, baseAddr + key);
598 for (i = 0; i < 100; i++) {
599 if (readw(baseAddr + key) == keycode)
604 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
605 if (readb(baseAddr + checksum_ok) != 1)
608 writew(0, baseAddr + key);
609 for (i = 0; i < 600; i++) {
610 if (readw(baseAddr + Magic_no) == Magic_code)
614 if (readw(baseAddr + Magic_no) != Magic_code)
617 if (MOXA_IS_320(brd)) {
618 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
619 writew(0x3800, baseAddr + TMS320_PORT1);
620 writew(0x3900, baseAddr + TMS320_PORT2);
621 writew(28499, baseAddr + TMS320_CLOCK);
623 writew(0x3200, baseAddr + TMS320_PORT1);
624 writew(0x3400, baseAddr + TMS320_PORT2);
625 writew(19999, baseAddr + TMS320_CLOCK);
628 writew(1, baseAddr + Disable_IRQ);
629 writew(0, baseAddr + Magic_no);
630 for (i = 0; i < 500; i++) {
631 if (readw(baseAddr + Magic_no) == Magic_code)
635 if (readw(baseAddr + Magic_no) != Magic_code)
638 if (MOXA_IS_320(brd)) {
639 j = readw(baseAddr + Module_cnt);
642 brd->numPorts = j * 8;
643 writew(j, baseAddr + Module_no);
644 writew(0, baseAddr + Magic_no);
645 for (i = 0; i < 600; i++) {
646 if (readw(baseAddr + Magic_no) == Magic_code)
650 if (readw(baseAddr + Magic_no) != Magic_code)
653 brd->intNdx = baseAddr + IRQindex;
654 brd->intPend = baseAddr + IRQpending;
655 brd->intTable = baseAddr + IRQtable;
660 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
663 void __iomem *ofsAddr, *baseAddr = brd->basemem;
664 struct moxa_port *port;
668 printk(KERN_ERR "MOXA: bios length is not even\n");
672 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
676 switch (brd->boardType) {
677 case MOXA_BOARD_C218_ISA:
678 case MOXA_BOARD_C218_PCI:
679 case MOXA_BOARD_CP204J:
681 for (i = 0; i < brd->numPorts; i++, port++) {
684 port->tableAddr = baseAddr + Extern_table +
686 ofsAddr = port->tableAddr;
687 writew(C218rx_mask, ofsAddr + RX_mask);
688 writew(C218tx_mask, ofsAddr + TX_mask);
689 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
690 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
692 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
693 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
699 for (i = 0; i < brd->numPorts; i++, port++) {
702 port->tableAddr = baseAddr + Extern_table +
704 ofsAddr = port->tableAddr;
705 switch (brd->numPorts) {
707 writew(C320p8rx_mask, ofsAddr + RX_mask);
708 writew(C320p8tx_mask, ofsAddr + TX_mask);
709 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
710 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
711 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
712 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
716 writew(C320p16rx_mask, ofsAddr + RX_mask);
717 writew(C320p16tx_mask, ofsAddr + TX_mask);
718 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
719 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
720 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
721 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
725 writew(C320p24rx_mask, ofsAddr + RX_mask);
726 writew(C320p24tx_mask, ofsAddr + TX_mask);
727 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
728 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
729 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
730 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
733 writew(C320p32rx_mask, ofsAddr + RX_mask);
734 writew(C320p32tx_mask, ofsAddr + TX_mask);
735 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
736 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
737 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
738 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
739 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
748 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
750 const void *ptr = fw->data;
754 unsigned int a, lenp, lencnt;
757 __le32 magic; /* 0x34303430 */
759 u8 type; /* UNIX = 3 */
760 u8 model; /* C218T=1, C320T=2, CP204=3 */
765 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
767 if (fw->size < MOXA_FW_HDRLEN) {
768 strcpy(rsn, "too short (even header won't fit)");
771 if (hdr->magic != cpu_to_le32(0x30343034)) {
772 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
775 if (hdr->type != 3) {
776 sprintf(rsn, "not for linux, type is %u", hdr->type);
779 if (moxa_check_fw_model(brd, hdr->model)) {
780 sprintf(rsn, "not for this card, model is %u", hdr->model);
784 len = MOXA_FW_HDRLEN;
785 lencnt = hdr->model == 2 ? 5 : 3;
786 for (a = 0; a < ARRAY_SIZE(lens); a++) {
787 lens[a] = le16_to_cpu(hdr->len[a]);
788 if (lens[a] && len + lens[a] <= fw->size &&
789 moxa_check_fw(&fw->data[len]))
790 printk(KERN_WARNING "MOXA firmware: unexpected input "
791 "at offset %u, but going on\n", (u32)len);
792 if (!lens[a] && a < lencnt) {
793 sprintf(rsn, "too few entries in fw file");
799 if (len != fw->size) {
800 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
805 ptr += MOXA_FW_HDRLEN;
808 strcpy(rsn, "read above");
810 ret = moxa_load_bios(brd, ptr, lens[lenp]);
814 /* we skip the tty section (lens[1]), since we don't need it */
815 ptr += lens[lenp] + lens[lenp + 1];
816 lenp += 2; /* comm */
818 if (hdr->model == 2) {
819 ret = moxa_load_320b(brd, ptr, lens[lenp]);
822 /* skip another tty */
823 ptr += lens[lenp] + lens[lenp + 1];
827 ret = moxa_load_code(brd, ptr, lens[lenp]);
833 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
837 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
839 const struct firmware *fw;
845 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
847 if (brd->ports == NULL) {
848 printk(KERN_ERR "cannot allocate memory for ports\n");
853 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
854 tty_port_init(&p->port);
855 p->port.ops = &moxa_port_ops;
856 p->type = PORT_16550A;
857 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
860 switch (brd->boardType) {
861 case MOXA_BOARD_C218_ISA:
862 case MOXA_BOARD_C218_PCI:
863 file = "c218tunx.cod";
865 case MOXA_BOARD_CP204J:
866 file = "cp204unx.cod";
869 file = "c320tunx.cod";
873 ret = request_firmware(&fw, file, dev);
875 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
876 "you've placed '%s' file into your firmware "
877 "loader directory (e.g. /lib/firmware)\n",
882 ret = moxa_load_fw(brd, fw);
884 release_firmware(fw);
889 spin_lock_bh(&moxa_lock);
891 if (!timer_pending(&moxaTimer))
892 mod_timer(&moxaTimer, jiffies + HZ / 50);
893 spin_unlock_bh(&moxa_lock);
902 static void moxa_board_deinit(struct moxa_board_conf *brd)
904 unsigned int a, opened;
906 mutex_lock(&moxa_openlock);
907 spin_lock_bh(&moxa_lock);
909 spin_unlock_bh(&moxa_lock);
911 /* pci hot-un-plug support */
912 for (a = 0; a < brd->numPorts; a++)
913 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
914 struct tty_struct *tty = tty_port_tty_get(
915 &brd->ports[a].port);
923 for (a = 0; a < brd->numPorts; a++)
924 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
926 mutex_unlock(&moxa_openlock);
930 mutex_lock(&moxa_openlock);
933 iounmap(brd->basemem);
939 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
940 const struct pci_device_id *ent)
942 struct moxa_board_conf *board;
944 int board_type = ent->driver_data;
947 retval = pci_enable_device(pdev);
949 dev_err(&pdev->dev, "can't enable pci device\n");
953 for (i = 0; i < MAX_BOARDS; i++)
954 if (moxa_boards[i].basemem == NULL)
958 if (i >= MAX_BOARDS) {
959 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
960 "found. Board is ignored.\n", MAX_BOARDS);
964 board = &moxa_boards[i];
966 retval = pci_request_region(pdev, 2, "moxa-base");
968 dev_err(&pdev->dev, "can't request pci region 2\n");
972 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
973 if (board->basemem == NULL) {
974 dev_err(&pdev->dev, "can't remap io space 2\n");
978 board->boardType = board_type;
979 switch (board_type) {
980 case MOXA_BOARD_C218_ISA:
981 case MOXA_BOARD_C218_PCI:
985 case MOXA_BOARD_CP204J:
992 board->busType = MOXA_BUS_TYPE_PCI;
994 retval = moxa_init_board(board, &pdev->dev);
998 pci_set_drvdata(pdev, board);
1000 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1001 moxa_brdname[board_type - 1], board->numPorts);
1005 iounmap(board->basemem);
1006 board->basemem = NULL;
1008 pci_release_region(pdev, 2);
1013 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1015 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1017 moxa_board_deinit(brd);
1019 pci_release_region(pdev, 2);
1022 static struct pci_driver moxa_pci_driver = {
1024 .id_table = moxa_pcibrds,
1025 .probe = moxa_pci_probe,
1026 .remove = __devexit_p(moxa_pci_remove)
1028 #endif /* CONFIG_PCI */
1030 static int __init moxa_init(void)
1032 unsigned int isabrds = 0;
1035 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1037 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1041 moxaDriver->owner = THIS_MODULE;
1042 moxaDriver->name = "ttyMX";
1043 moxaDriver->major = ttymajor;
1044 moxaDriver->minor_start = 0;
1045 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1046 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1047 moxaDriver->init_termios = tty_std_termios;
1048 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1049 moxaDriver->init_termios.c_ispeed = 9600;
1050 moxaDriver->init_termios.c_ospeed = 9600;
1051 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1052 tty_set_operations(moxaDriver, &moxa_ops);
1054 if (tty_register_driver(moxaDriver)) {
1055 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1056 put_tty_driver(moxaDriver);
1060 /* Find the boards defined from module args. */
1063 struct moxa_board_conf *brd = moxa_boards;
1065 for (i = 0; i < MAX_BOARDS; i++) {
1068 if (type[i] == MOXA_BOARD_C218_ISA ||
1069 type[i] == MOXA_BOARD_C320_ISA) {
1070 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1071 isabrds + 1, moxa_brdname[type[i] - 1],
1073 brd->boardType = type[i];
1074 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1076 brd->busType = MOXA_BUS_TYPE_ISA;
1077 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1078 if (!brd->basemem) {
1079 printk(KERN_ERR "MOXA: can't remap %lx\n",
1083 if (moxa_init_board(brd, NULL)) {
1084 iounmap(brd->basemem);
1085 brd->basemem = NULL;
1089 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1090 "ready (%u ports, firmware loaded)\n",
1091 baseaddr[i], brd->numPorts);
1101 retval = pci_register_driver(&moxa_pci_driver);
1103 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1112 static void __exit moxa_exit(void)
1117 pci_unregister_driver(&moxa_pci_driver);
1120 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1121 if (moxa_boards[i].ready)
1122 moxa_board_deinit(&moxa_boards[i]);
1124 del_timer_sync(&moxaTimer);
1126 if (tty_unregister_driver(moxaDriver))
1127 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1129 put_tty_driver(moxaDriver);
1132 module_init(moxa_init);
1133 module_exit(moxa_exit);
1135 static void moxa_shutdown(struct tty_port *port)
1137 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1138 MoxaPortDisable(ch);
1139 MoxaPortFlushData(ch, 2);
1140 clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
1143 static int moxa_carrier_raised(struct tty_port *port)
1145 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1148 spin_lock_bh(&moxa_lock);
1150 spin_unlock_bh(&moxa_lock);
1154 static void moxa_dtr_rts(struct tty_port *port, int onoff)
1156 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1157 MoxaPortLineCtrl(ch, onoff, onoff);
1161 static int moxa_open(struct tty_struct *tty, struct file *filp)
1163 struct moxa_board_conf *brd;
1164 struct moxa_port *ch;
1169 if (port == MAX_PORTS) {
1170 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1172 if (mutex_lock_interruptible(&moxa_openlock))
1173 return -ERESTARTSYS;
1174 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1176 mutex_unlock(&moxa_openlock);
1180 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1181 mutex_unlock(&moxa_openlock);
1185 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1187 tty->driver_data = ch;
1188 tty_port_tty_set(&ch->port, tty);
1189 mutex_lock(&ch->port.mutex);
1190 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1191 ch->statusflags = 0;
1192 moxa_set_tty_param(tty, tty->termios);
1193 MoxaPortLineCtrl(ch, 1, 1);
1195 MoxaSetFifo(ch, ch->type == PORT_16550A);
1196 ch->port.flags |= ASYNC_INITIALIZED;
1198 mutex_unlock(&ch->port.mutex);
1199 mutex_unlock(&moxa_openlock);
1201 retval = tty_port_block_til_ready(&ch->port, tty, filp);
1203 set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
1207 static void moxa_close(struct tty_struct *tty, struct file *filp)
1209 struct moxa_port *ch = tty->driver_data;
1210 ch->cflag = tty->termios->c_cflag;
1211 mutex_lock(&moxa_openlock);
1212 tty_port_close(&ch->port, tty, filp);
1213 mutex_unlock(&moxa_openlock);
1216 static int moxa_write(struct tty_struct *tty,
1217 const unsigned char *buf, int count)
1219 struct moxa_port *ch = tty->driver_data;
1225 spin_lock_bh(&moxa_lock);
1226 len = MoxaPortWriteData(tty, buf, count);
1227 spin_unlock_bh(&moxa_lock);
1229 ch->statusflags |= LOWWAIT;
1233 static int moxa_write_room(struct tty_struct *tty)
1235 struct moxa_port *ch;
1239 ch = tty->driver_data;
1242 return MoxaPortTxFree(ch);
1245 static void moxa_flush_buffer(struct tty_struct *tty)
1247 struct moxa_port *ch = tty->driver_data;
1251 MoxaPortFlushData(ch, 1);
1255 static int moxa_chars_in_buffer(struct tty_struct *tty)
1257 struct moxa_port *ch = tty->driver_data;
1261 chars = MoxaPortTxQueue(ch);
1264 * Make it possible to wakeup anything waiting for output
1265 * in tty_ioctl.c, etc.
1267 if (!(ch->statusflags & EMPTYWAIT))
1268 moxa_setup_empty_event(tty);
1274 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1276 struct moxa_port *ch;
1277 int flag = 0, dtr, rts;
1279 mutex_lock(&moxa_openlock);
1280 ch = tty->driver_data;
1282 mutex_unlock(&moxa_openlock);
1286 MoxaPortGetLineOut(ch, &dtr, &rts);
1291 dtr = MoxaPortLineStatus(ch);
1298 mutex_unlock(&moxa_openlock);
1302 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1303 unsigned int set, unsigned int clear)
1305 struct moxa_port *ch;
1310 mutex_lock(&moxa_openlock);
1311 ch = tty->driver_data;
1313 mutex_unlock(&moxa_openlock);
1317 MoxaPortGetLineOut(ch, &dtr, &rts);
1318 if (set & TIOCM_RTS)
1320 if (set & TIOCM_DTR)
1322 if (clear & TIOCM_RTS)
1324 if (clear & TIOCM_DTR)
1326 MoxaPortLineCtrl(ch, dtr, rts);
1327 mutex_unlock(&moxa_openlock);
1331 static void moxa_throttle(struct tty_struct *tty)
1333 struct moxa_port *ch = tty->driver_data;
1335 ch->statusflags |= THROTTLE;
1338 static void moxa_unthrottle(struct tty_struct *tty)
1340 struct moxa_port *ch = tty->driver_data;
1342 ch->statusflags &= ~THROTTLE;
1345 static void moxa_set_termios(struct tty_struct *tty,
1346 struct ktermios *old_termios)
1348 struct moxa_port *ch = tty->driver_data;
1352 moxa_set_tty_param(tty, old_termios);
1353 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1354 wake_up_interruptible(&ch->port.open_wait);
1357 static void moxa_stop(struct tty_struct *tty)
1359 struct moxa_port *ch = tty->driver_data;
1363 MoxaPortTxDisable(ch);
1364 ch->statusflags |= TXSTOPPED;
1368 static void moxa_start(struct tty_struct *tty)
1370 struct moxa_port *ch = tty->driver_data;
1375 if (!(ch->statusflags & TXSTOPPED))
1378 MoxaPortTxEnable(ch);
1379 ch->statusflags &= ~TXSTOPPED;
1382 static void moxa_hangup(struct tty_struct *tty)
1384 struct moxa_port *ch;
1386 mutex_lock(&moxa_openlock);
1387 ch = tty->driver_data;
1388 tty_port_hangup(&ch->port);
1389 mutex_unlock(&moxa_openlock);
1392 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1394 struct tty_struct *tty;
1397 if (dcd != p->DCDState) {
1398 tty = tty_port_tty_get(&p->port);
1399 if (tty && C_CLOCAL(tty) && !dcd)
1406 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1409 struct tty_struct *tty = tty_port_tty_get(&p->port);
1410 void __iomem *ofsAddr;
1411 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1415 if ((p->statusflags & EMPTYWAIT) &&
1416 MoxaPortTxQueue(p) == 0) {
1417 p->statusflags &= ~EMPTYWAIT;
1420 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1421 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1422 p->statusflags &= ~LOWWAIT;
1426 if (inited && !(p->statusflags & THROTTLE) &&
1427 MoxaPortRxQueue(p) > 0) { /* RX */
1428 MoxaPortReadData(p);
1429 tty_schedule_flip(tty);
1432 p->statusflags &= ~EMPTYWAIT;
1433 MoxaPortFlushData(p, 0); /* flush RX */
1436 if (!handle) /* nothing else to do */
1439 intr = readw(ip); /* port irq status */
1443 writew(0, ip); /* ACK port */
1444 ofsAddr = p->tableAddr;
1445 if (intr & IntrTx) /* disable tx intr */
1446 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1447 ofsAddr + HostStat);
1452 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1453 tty_insert_flip_char(tty, 0, TTY_BREAK);
1454 tty_schedule_flip(tty);
1457 if (intr & IntrLine)
1458 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1465 static void moxa_poll(unsigned long ignored)
1467 struct moxa_board_conf *brd;
1469 unsigned int card, port, served = 0;
1471 spin_lock(&moxa_lock);
1472 for (card = 0; card < MAX_BOARDS; card++) {
1473 brd = &moxa_boards[card];
1480 if (readb(brd->intPend) == 0xff)
1481 ip = brd->intTable + readb(brd->intNdx);
1483 for (port = 0; port < brd->numPorts; port++)
1484 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1487 writeb(0, brd->intPend); /* ACK */
1489 if (moxaLowWaterChk) {
1490 struct moxa_port *p = brd->ports;
1491 for (port = 0; port < brd->numPorts; port++, p++)
1492 if (p->lowChkFlag) {
1494 moxa_low_water_check(p->tableAddr);
1498 moxaLowWaterChk = 0;
1501 mod_timer(&moxaTimer, jiffies + HZ / 50);
1502 spin_unlock(&moxa_lock);
1505 /******************************************************************************/
1507 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1509 register struct ktermios *ts = tty->termios;
1510 struct moxa_port *ch = tty->driver_data;
1511 int rts, cts, txflow, rxflow, xany, baud;
1513 rts = cts = txflow = rxflow = xany = 0;
1514 if (ts->c_cflag & CRTSCTS)
1516 if (ts->c_iflag & IXON)
1518 if (ts->c_iflag & IXOFF)
1520 if (ts->c_iflag & IXANY)
1523 /* Clear the features we don't support */
1524 ts->c_cflag &= ~CMSPAR;
1525 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1526 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1528 baud = tty_termios_baud_rate(old_termios);
1529 /* Not put the baud rate into the termios data */
1530 tty_encode_baud_rate(tty, baud, baud);
1533 static void moxa_setup_empty_event(struct tty_struct *tty)
1535 struct moxa_port *ch = tty->driver_data;
1537 spin_lock_bh(&moxa_lock);
1538 ch->statusflags |= EMPTYWAIT;
1539 spin_unlock_bh(&moxa_lock);
1542 /*****************************************************************************
1543 * Driver level functions: *
1544 *****************************************************************************/
1546 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1548 void __iomem *ofsAddr;
1549 if (mode < 0 || mode > 2)
1551 ofsAddr = port->tableAddr;
1552 moxafunc(ofsAddr, FC_FlushQueue, mode);
1554 port->lowChkFlag = 0;
1555 moxa_low_water_check(ofsAddr);
1560 * Moxa Port Number Description:
1562 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1563 * the port number using in MOXA driver functions will be 0 to 31 for
1564 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1565 * to 127 for fourth. For example, if you setup three MOXA boards,
1566 * first board is C218, second board is C320-16 and third board is
1567 * C320-32. The port number of first board (C218 - 8 ports) is from
1568 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1569 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1570 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1571 * 127 will be invalid.
1574 * Moxa Functions Description:
1576 * Function 1: Driver initialization routine, this routine must be
1577 * called when initialized driver.
1579 * void MoxaDriverInit();
1582 * Function 2: Moxa driver private IOCTL command processing.
1584 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1586 * unsigned int cmd : IOCTL command
1587 * unsigned long arg : IOCTL argument
1588 * int port : port number (0 - 127)
1595 * Function 6: Enable this port to start Tx/Rx data.
1597 * void MoxaPortEnable(int port);
1598 * int port : port number (0 - 127)
1601 * Function 7: Disable this port
1603 * void MoxaPortDisable(int port);
1604 * int port : port number (0 - 127)
1607 * Function 10: Setting baud rate of this port.
1609 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1610 * int port : port number (0 - 127)
1611 * long baud : baud rate (50 - 115200)
1613 * return: 0 : this port is invalid or baud < 50
1614 * 50 - 115200 : the real baud rate set to the port, if
1615 * the argument baud is large than maximun
1616 * available baud rate, the real setting
1617 * baud rate will be the maximun baud rate.
1620 * Function 12: Configure the port.
1622 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1623 * int port : port number (0 - 127)
1624 * struct ktermios * termio : termio structure pointer
1625 * speed_t baud : baud rate
1627 * return: -1 : this port is invalid or termio == NULL
1631 * Function 13: Get the DTR/RTS state of this port.
1633 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1634 * int port : port number (0 - 127)
1635 * int * dtrState : pointer to INT to receive the current DTR
1636 * state. (if NULL, this function will not
1637 * write to this address)
1638 * int * rtsState : pointer to INT to receive the current RTS
1639 * state. (if NULL, this function will not
1640 * write to this address)
1642 * return: -1 : this port is invalid
1646 * Function 14: Setting the DTR/RTS output state of this port.
1648 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1649 * int port : port number (0 - 127)
1650 * int dtrState : DTR output state (0: off, 1: on)
1651 * int rtsState : RTS output state (0: off, 1: on)
1654 * Function 15: Setting the flow control of this port.
1656 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1657 * int txFlow,int xany);
1658 * int port : port number (0 - 127)
1659 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1660 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1661 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1662 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1663 * int xany : S/W XANY flow control (0: no, 1: yes)
1666 * Function 16: Get ths line status of this port
1668 * int MoxaPortLineStatus(int port);
1669 * int port : port number (0 - 127)
1671 * return: Bit 0 - CTS state (0: off, 1: on)
1672 * Bit 1 - DSR state (0: off, 1: on)
1673 * Bit 2 - DCD state (0: off, 1: on)
1676 * Function 19: Flush the Rx/Tx buffer data of this port.
1678 * void MoxaPortFlushData(int port, int mode);
1679 * int port : port number (0 - 127)
1681 * 0 : flush the Rx buffer
1682 * 1 : flush the Tx buffer
1683 * 2 : flush the Rx and Tx buffer
1686 * Function 20: Write data.
1688 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1689 * int port : port number (0 - 127)
1690 * unsigned char * buffer : pointer to write data buffer.
1691 * int length : write data length
1693 * return: 0 - length : real write data length
1696 * Function 21: Read data.
1698 * int MoxaPortReadData(int port, struct tty_struct *tty);
1699 * int port : port number (0 - 127)
1700 * struct tty_struct *tty : tty for data
1702 * return: 0 - length : real read data length
1705 * Function 24: Get the Tx buffer current queued data bytes
1707 * int MoxaPortTxQueue(int port);
1708 * int port : port number (0 - 127)
1710 * return: .. : Tx buffer current queued data bytes
1713 * Function 25: Get the Tx buffer current free space
1715 * int MoxaPortTxFree(int port);
1716 * int port : port number (0 - 127)
1718 * return: .. : Tx buffer current free space
1721 * Function 26: Get the Rx buffer current queued data bytes
1723 * int MoxaPortRxQueue(int port);
1724 * int port : port number (0 - 127)
1726 * return: .. : Rx buffer current queued data bytes
1729 * Function 28: Disable port data transmission.
1731 * void MoxaPortTxDisable(int port);
1732 * int port : port number (0 - 127)
1735 * Function 29: Enable port data transmission.
1737 * void MoxaPortTxEnable(int port);
1738 * int port : port number (0 - 127)
1741 * Function 31: Get the received BREAK signal count and reset it.
1743 * int MoxaPortResetBrkCnt(int port);
1744 * int port : port number (0 - 127)
1746 * return: 0 - .. : BREAK signal count
1751 static void MoxaPortEnable(struct moxa_port *port)
1753 void __iomem *ofsAddr;
1756 ofsAddr = port->tableAddr;
1757 writew(lowwater, ofsAddr + Low_water);
1758 if (MOXA_IS_320(port->board))
1759 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1761 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1762 ofsAddr + HostStat);
1764 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1765 moxafunc(ofsAddr, FC_FlushQueue, 2);
1767 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1768 MoxaPortLineStatus(port);
1771 static void MoxaPortDisable(struct moxa_port *port)
1773 void __iomem *ofsAddr = port->tableAddr;
1775 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1776 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1777 writew(0, ofsAddr + HostStat);
1778 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1781 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1783 void __iomem *ofsAddr = port->tableAddr;
1784 unsigned int clock, val;
1787 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1794 moxafunc(ofsAddr, FC_SetBaud, val);
1799 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1802 void __iomem *ofsAddr;
1806 ofsAddr = port->tableAddr;
1807 cflag = termio->c_cflag; /* termio->c_cflag */
1809 mode = termio->c_cflag & CSIZE;
1812 else if (mode == CS6)
1814 else if (mode == CS7)
1816 else if (mode == CS8)
1819 if (termio->c_cflag & CSTOPB) {
1827 if (termio->c_cflag & PARENB) {
1828 if (termio->c_cflag & PARODD)
1835 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1837 if (MOXA_IS_320(port->board) && baud >= 921600)
1840 baud = MoxaPortSetBaud(port, baud);
1842 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1843 spin_lock_irq(&moxafunc_lock);
1844 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1845 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1846 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1847 moxa_wait_finish(ofsAddr);
1848 spin_unlock_irqrestore(&moxafunc_lock);
1854 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1858 *dtrState = !!(port->lineCtrl & DTR_ON);
1860 *rtsState = !!(port->lineCtrl & RTS_ON);
1865 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1873 port->lineCtrl = mode;
1874 moxafunc(port->tableAddr, FC_LineControl, mode);
1877 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1878 int txflow, int rxflow, int txany)
1883 mode |= RTS_FlowCtl;
1885 mode |= CTS_FlowCtl;
1892 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1895 static int MoxaPortLineStatus(struct moxa_port *port)
1897 void __iomem *ofsAddr;
1900 ofsAddr = port->tableAddr;
1901 if (MOXA_IS_320(port->board))
1902 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1904 val = readw(ofsAddr + FlagStat) >> 4;
1908 spin_lock_bh(&moxa_lock);
1909 moxa_new_dcdstate(port, val & 8);
1910 spin_unlock_bh(&moxa_lock);
1915 static int MoxaPortWriteData(struct tty_struct *tty,
1916 const unsigned char *buffer, int len)
1918 struct moxa_port *port = tty->driver_data;
1919 void __iomem *baseAddr, *ofsAddr, *ofs;
1920 unsigned int c, total;
1921 u16 head, tail, tx_mask, spage, epage;
1922 u16 pageno, pageofs, bufhead;
1924 ofsAddr = port->tableAddr;
1925 baseAddr = port->board->basemem;
1926 tx_mask = readw(ofsAddr + TX_mask);
1927 spage = readw(ofsAddr + Page_txb);
1928 epage = readw(ofsAddr + EndPage_txb);
1929 tail = readw(ofsAddr + TXwptr);
1930 head = readw(ofsAddr + TXrptr);
1931 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1934 moxaLog.txcnt[port->port.tty->index] += c;
1936 if (spage == epage) {
1937 bufhead = readw(ofsAddr + Ofs_txb);
1938 writew(spage, baseAddr + Control_reg);
1941 len = head - tail - 1;
1943 len = tx_mask + 1 - tail;
1944 len = (c > len) ? len : c;
1945 ofs = baseAddr + DynPage_addr + bufhead + tail;
1946 memcpy_toio(ofs, buffer, len);
1948 tail = (tail + len) & tx_mask;
1952 pageno = spage + (tail >> 13);
1953 pageofs = tail & Page_mask;
1955 len = Page_size - pageofs;
1958 writeb(pageno, baseAddr + Control_reg);
1959 ofs = baseAddr + DynPage_addr + pageofs;
1960 memcpy_toio(ofs, buffer, len);
1962 if (++pageno == epage)
1967 tail = (tail + total) & tx_mask;
1969 writew(tail, ofsAddr + TXwptr);
1970 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1974 static int MoxaPortReadData(struct moxa_port *port)
1976 struct tty_struct *tty = port->port.tty;
1978 void __iomem *baseAddr, *ofsAddr, *ofs;
1979 unsigned int count, len, total;
1980 u16 tail, rx_mask, spage, epage;
1981 u16 pageno, pageofs, bufhead, head;
1983 ofsAddr = port->tableAddr;
1984 baseAddr = port->board->basemem;
1985 head = readw(ofsAddr + RXrptr);
1986 tail = readw(ofsAddr + RXwptr);
1987 rx_mask = readw(ofsAddr + RX_mask);
1988 spage = readw(ofsAddr + Page_rxb);
1989 epage = readw(ofsAddr + EndPage_rxb);
1990 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1995 moxaLog.rxcnt[tty->index] += total;
1996 if (spage == epage) {
1997 bufhead = readw(ofsAddr + Ofs_rxb);
1998 writew(spage, baseAddr + Control_reg);
2000 ofs = baseAddr + DynPage_addr + bufhead + head;
2001 len = (tail >= head) ? (tail - head) :
2002 (rx_mask + 1 - head);
2003 len = tty_prepare_flip_string(tty, &dst,
2005 memcpy_fromio(dst, ofs, len);
2006 head = (head + len) & rx_mask;
2010 pageno = spage + (head >> 13);
2011 pageofs = head & Page_mask;
2013 writew(pageno, baseAddr + Control_reg);
2014 ofs = baseAddr + DynPage_addr + pageofs;
2015 len = tty_prepare_flip_string(tty, &dst,
2016 min(Page_size - pageofs, count));
2017 memcpy_fromio(dst, ofs, len);
2020 pageofs = (pageofs + len) & Page_mask;
2021 if (pageofs == 0 && ++pageno == epage)
2024 head = (head + total) & rx_mask;
2026 writew(head, ofsAddr + RXrptr);
2027 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2028 moxaLowWaterChk = 1;
2029 port->lowChkFlag = 1;
2035 static int MoxaPortTxQueue(struct moxa_port *port)
2037 void __iomem *ofsAddr = port->tableAddr;
2038 u16 rptr, wptr, mask;
2040 rptr = readw(ofsAddr + TXrptr);
2041 wptr = readw(ofsAddr + TXwptr);
2042 mask = readw(ofsAddr + TX_mask);
2043 return (wptr - rptr) & mask;
2046 static int MoxaPortTxFree(struct moxa_port *port)
2048 void __iomem *ofsAddr = port->tableAddr;
2049 u16 rptr, wptr, mask;
2051 rptr = readw(ofsAddr + TXrptr);
2052 wptr = readw(ofsAddr + TXwptr);
2053 mask = readw(ofsAddr + TX_mask);
2054 return mask - ((wptr - rptr) & mask);
2057 static int MoxaPortRxQueue(struct moxa_port *port)
2059 void __iomem *ofsAddr = port->tableAddr;
2060 u16 rptr, wptr, mask;
2062 rptr = readw(ofsAddr + RXrptr);
2063 wptr = readw(ofsAddr + RXwptr);
2064 mask = readw(ofsAddr + RX_mask);
2065 return (wptr - rptr) & mask;
2068 static void MoxaPortTxDisable(struct moxa_port *port)
2070 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2073 static void MoxaPortTxEnable(struct moxa_port *port)
2075 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2078 static int moxa_get_serial_info(struct moxa_port *info,
2079 struct serial_struct __user *retinfo)
2081 struct serial_struct tmp = {
2083 .line = info->port.tty->index,
2084 .flags = info->port.flags,
2085 .baud_base = 921600,
2086 .close_delay = info->port.close_delay
2088 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2092 static int moxa_set_serial_info(struct moxa_port *info,
2093 struct serial_struct __user *new_info)
2095 struct serial_struct new_serial;
2097 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2100 if (new_serial.irq != 0 || new_serial.port != 0 ||
2101 new_serial.custom_divisor != 0 ||
2102 new_serial.baud_base != 921600)
2105 if (!capable(CAP_SYS_ADMIN)) {
2106 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2107 (info->port.flags & ~ASYNC_USR_MASK)))
2110 info->port.close_delay = new_serial.close_delay * HZ / 100;
2112 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2113 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2115 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2117 info->type = new_serial.type;
2123 /*****************************************************************************
2124 * Static local functions: *
2125 *****************************************************************************/
2127 static void MoxaSetFifo(struct moxa_port *port, int enable)
2129 void __iomem *ofsAddr = port->tableAddr;
2132 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2133 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2135 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2136 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);