1 /*****************************************************************************/
3 * moxa.c -- MOXA Intellio family multiport serial driver.
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
17 * MOXA Intellio Series Driver
23 #include <linux/module.h>
24 #include <linux/types.h>
26 #include <linux/ioport.h>
27 #include <linux/errno.h>
28 #include <linux/firmware.h>
29 #include <linux/signal.h>
30 #include <linux/sched.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/major.h>
36 #include <linux/string.h>
37 #include <linux/fcntl.h>
38 #include <linux/ptrace.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43 #include <linux/init.h>
44 #include <linux/bitops.h>
46 #include <asm/system.h>
48 #include <asm/uaccess.h>
52 #define MOXA_VERSION "5.1k"
54 #define MOXA_FW_HDRLEN 32
58 #define MAX_BOARDS 4 /* Don't change this value */
59 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
60 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
62 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
63 (brd)->boardType == MOXA_BOARD_C320_PCI)
66 * Define the Moxa PCI vendor and device IDs.
68 #define MOXA_BUS_TYPE_ISA 0
69 #define MOXA_BUS_TYPE_PCI 1
72 MOXA_BOARD_C218_PCI = 1,
79 static char *moxa_brdname[] =
81 "C218 Turbo PCI series",
82 "C218 Turbo ISA series",
83 "C320 Turbo PCI series",
84 "C320 Turbo ISA series",
89 static struct pci_device_id moxa_pcibrds[] = {
90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
91 .driver_data = MOXA_BOARD_C218_PCI },
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
93 .driver_data = MOXA_BOARD_C320_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
95 .driver_data = MOXA_BOARD_CP204J },
98 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
99 #endif /* CONFIG_PCI */
103 static struct moxa_board_conf {
110 struct moxa_port *ports;
112 void __iomem *basemem;
113 void __iomem *intNdx;
114 void __iomem *intPend;
115 void __iomem *intTable;
116 } moxa_boards[MAX_BOARDS];
118 struct mxser_mstatus {
132 struct moxa_board_conf *board;
133 struct tty_struct *tty;
134 void __iomem *tableAddr;
141 unsigned long statusflags;
142 wait_queue_head_t open_wait;
151 int rxcnt[MAX_PORTS];
152 int txcnt[MAX_PORTS];
156 #define TXSTOPPED 0x1
158 #define EMPTYWAIT 0x4
161 #define SERIAL_DO_RESTART
163 #define WAKEUP_CHARS 256
165 static int ttymajor = MOXAMAJOR;
166 static struct mon_str moxaLog;
167 static unsigned int moxaFuncTout = HZ / 2;
168 static unsigned int moxaLowWaterChk;
169 static DEFINE_MUTEX(moxa_openlock);
170 /* Variables for insmod */
172 static unsigned long baseaddr[MAX_BOARDS];
173 static unsigned int type[MAX_BOARDS];
174 static unsigned int numports[MAX_BOARDS];
177 MODULE_AUTHOR("William Chen");
178 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
179 MODULE_LICENSE("GPL");
181 module_param_array(type, uint, NULL, 0);
182 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
183 module_param_array(baseaddr, ulong, NULL, 0);
184 MODULE_PARM_DESC(baseaddr, "base address");
185 module_param_array(numports, uint, NULL, 0);
186 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
188 module_param(ttymajor, int, 0);
193 static int moxa_open(struct tty_struct *, struct file *);
194 static void moxa_close(struct tty_struct *, struct file *);
195 static int moxa_write(struct tty_struct *, const unsigned char *, int);
196 static int moxa_write_room(struct tty_struct *);
197 static void moxa_flush_buffer(struct tty_struct *);
198 static int moxa_chars_in_buffer(struct tty_struct *);
199 static void moxa_throttle(struct tty_struct *);
200 static void moxa_unthrottle(struct tty_struct *);
201 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
202 static void moxa_stop(struct tty_struct *);
203 static void moxa_start(struct tty_struct *);
204 static void moxa_hangup(struct tty_struct *);
205 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
206 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
207 unsigned int set, unsigned int clear);
208 static void moxa_poll(unsigned long);
209 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
210 static void moxa_setup_empty_event(struct tty_struct *);
211 static void moxa_shut_down(struct moxa_port *);
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 moxa_port *, 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)
251 writew(arg, ofsAddr + FuncArg);
252 writew(cmd, ofsAddr + FuncCode);
253 moxa_wait_finish(ofsAddr);
256 static void moxa_low_water_check(void __iomem *ofsAddr)
258 u16 rptr, wptr, mask, len;
260 if (readb(ofsAddr + FlagStat) & Xoff_state) {
261 rptr = readw(ofsAddr + RXrptr);
262 wptr = readw(ofsAddr + RXwptr);
263 mask = readw(ofsAddr + RX_mask);
264 len = (wptr - rptr) & mask;
265 if (len <= Low_water)
266 moxafunc(ofsAddr, FC_SendXon, 0);
274 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
275 unsigned int cmd, unsigned long arg)
277 struct moxa_port *ch = tty->driver_data;
278 void __user *argp = (void __user *)arg;
281 if (tty->index == MAX_PORTS) {
282 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
283 cmd != MOXA_GETMSTATUS)
289 case MOXA_GETDATACOUNT:
290 moxaLog.tick = jiffies;
291 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
294 case MOXA_FLUSH_QUEUE:
295 MoxaPortFlushData(ch, arg);
297 case MOXA_GET_IOQUEUE: {
298 struct moxaq_str __user *argm = argp;
299 struct moxaq_str tmp;
303 mutex_lock(&moxa_openlock);
304 for (i = 0; i < MAX_BOARDS; i++) {
305 p = moxa_boards[i].ports;
306 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
307 memset(&tmp, 0, sizeof(tmp));
308 if (moxa_boards[i].ready) {
309 tmp.inq = MoxaPortRxQueue(p);
310 tmp.outq = MoxaPortTxQueue(p);
312 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
313 mutex_unlock(&moxa_openlock);
318 mutex_unlock(&moxa_openlock);
320 } case MOXA_GET_OQUEUE:
321 status = MoxaPortTxQueue(ch);
322 ret = put_user(status, (unsigned long __user *)argp);
324 case MOXA_GET_IQUEUE:
325 status = MoxaPortRxQueue(ch);
326 ret = put_user(status, (unsigned long __user *)argp);
328 case MOXA_GETMSTATUS: {
329 struct mxser_mstatus __user *argm = argp;
330 struct mxser_mstatus tmp;
334 mutex_lock(&moxa_openlock);
335 for (i = 0; i < MAX_BOARDS; i++) {
336 p = moxa_boards[i].ports;
337 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
338 memset(&tmp, 0, sizeof(tmp));
339 if (!moxa_boards[i].ready)
342 status = MoxaPortLineStatus(p);
350 if (!p->tty || !p->tty->termios)
351 tmp.cflag = p->cflag;
353 tmp.cflag = p->tty->termios->c_cflag;
355 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
356 mutex_unlock(&moxa_openlock);
361 mutex_unlock(&moxa_openlock);
365 mutex_lock(&moxa_openlock);
366 ret = moxa_get_serial_info(ch, argp);
367 mutex_unlock(&moxa_openlock);
370 mutex_lock(&moxa_openlock);
371 ret = moxa_set_serial_info(ch, argp);
372 mutex_unlock(&moxa_openlock);
380 static void moxa_break_ctl(struct tty_struct *tty, int state)
382 struct moxa_port *port = tty->driver_data;
384 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
388 static const struct tty_operations moxa_ops = {
392 .write_room = moxa_write_room,
393 .flush_buffer = moxa_flush_buffer,
394 .chars_in_buffer = moxa_chars_in_buffer,
396 .throttle = moxa_throttle,
397 .unthrottle = moxa_unthrottle,
398 .set_termios = moxa_set_termios,
401 .hangup = moxa_hangup,
402 .break_ctl = moxa_break_ctl,
403 .tiocmget = moxa_tiocmget,
404 .tiocmset = moxa_tiocmset,
407 static struct tty_driver *moxaDriver;
408 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
409 static DEFINE_SPINLOCK(moxa_lock);
415 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
417 switch (brd->boardType) {
418 case MOXA_BOARD_C218_ISA:
419 case MOXA_BOARD_C218_PCI:
423 case MOXA_BOARD_CP204J:
437 static int moxa_check_fw(const void *ptr)
439 const __le16 *lptr = ptr;
441 if (*lptr != cpu_to_le16(0x7980))
447 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
450 void __iomem *baseAddr = brd->basemem;
453 writeb(HW_reset, baseAddr + Control_reg); /* reset */
455 memset_io(baseAddr, 0, 4096);
456 memcpy_toio(baseAddr, buf, len); /* download BIOS */
457 writeb(0, baseAddr + Control_reg); /* restart */
461 switch (brd->boardType) {
462 case MOXA_BOARD_C218_ISA:
463 case MOXA_BOARD_C218_PCI:
464 tmp = readw(baseAddr + C218_key);
465 if (tmp != C218_KeyCode)
468 case MOXA_BOARD_CP204J:
469 tmp = readw(baseAddr + C218_key);
470 if (tmp != CP204J_KeyCode)
474 tmp = readw(baseAddr + C320_key);
475 if (tmp != C320_KeyCode)
477 tmp = readw(baseAddr + C320_status);
478 if (tmp != STS_init) {
479 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
480 "module not found\n");
488 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
492 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
495 void __iomem *baseAddr = brd->basemem;
498 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
502 writew(len - 7168 - 2, baseAddr + C320bapi_len);
503 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
504 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
505 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
506 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
511 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
514 void __iomem *baseAddr = brd->basemem;
515 const u16 *uptr = ptr;
516 size_t wlen, len2, j;
517 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
518 unsigned int i, retry;
521 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
524 switch (brd->boardType) {
525 case MOXA_BOARD_CP204J:
526 case MOXA_BOARD_C218_ISA:
527 case MOXA_BOARD_C218_PCI:
529 loadbuf = C218_LoadBuf;
530 loadlen = C218DLoad_len;
531 checksum = C218check_sum;
532 checksum_ok = C218chksum_ok;
536 keycode = C320_KeyCode;
537 loadbuf = C320_LoadBuf;
538 loadlen = C320DLoad_len;
539 checksum = C320check_sum;
540 checksum_ok = C320chksum_ok;
546 for (i = 0; i < wlen; i++)
547 usum += le16_to_cpu(uptr[i]);
553 len2 = (wlen > 2048) ? 2048 : wlen;
555 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
558 writew(len2, baseAddr + loadlen);
559 writew(0, baseAddr + key);
560 for (i = 0; i < 100; i++) {
561 if (readw(baseAddr + key) == keycode)
565 if (readw(baseAddr + key) != keycode)
568 writew(0, baseAddr + loadlen);
569 writew(usum, baseAddr + checksum);
570 writew(0, baseAddr + key);
571 for (i = 0; i < 100; i++) {
572 if (readw(baseAddr + key) == keycode)
577 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
578 if (readb(baseAddr + checksum_ok) != 1)
581 writew(0, baseAddr + key);
582 for (i = 0; i < 600; i++) {
583 if (readw(baseAddr + Magic_no) == Magic_code)
587 if (readw(baseAddr + Magic_no) != Magic_code)
590 if (MOXA_IS_320(brd)) {
591 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
592 writew(0x3800, baseAddr + TMS320_PORT1);
593 writew(0x3900, baseAddr + TMS320_PORT2);
594 writew(28499, baseAddr + TMS320_CLOCK);
596 writew(0x3200, baseAddr + TMS320_PORT1);
597 writew(0x3400, baseAddr + TMS320_PORT2);
598 writew(19999, baseAddr + TMS320_CLOCK);
601 writew(1, baseAddr + Disable_IRQ);
602 writew(0, baseAddr + Magic_no);
603 for (i = 0; i < 500; i++) {
604 if (readw(baseAddr + Magic_no) == Magic_code)
608 if (readw(baseAddr + Magic_no) != Magic_code)
611 if (MOXA_IS_320(brd)) {
612 j = readw(baseAddr + Module_cnt);
615 brd->numPorts = j * 8;
616 writew(j, baseAddr + Module_no);
617 writew(0, baseAddr + Magic_no);
618 for (i = 0; i < 600; i++) {
619 if (readw(baseAddr + Magic_no) == Magic_code)
623 if (readw(baseAddr + Magic_no) != Magic_code)
626 brd->intNdx = baseAddr + IRQindex;
627 brd->intPend = baseAddr + IRQpending;
628 brd->intTable = baseAddr + IRQtable;
633 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
636 void __iomem *ofsAddr, *baseAddr = brd->basemem;
637 struct moxa_port *port;
641 printk(KERN_ERR "MOXA: bios length is not even\n");
645 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
649 switch (brd->boardType) {
650 case MOXA_BOARD_C218_ISA:
651 case MOXA_BOARD_C218_PCI:
652 case MOXA_BOARD_CP204J:
654 for (i = 0; i < brd->numPorts; i++, port++) {
657 port->tableAddr = baseAddr + Extern_table +
659 ofsAddr = port->tableAddr;
660 writew(C218rx_mask, ofsAddr + RX_mask);
661 writew(C218tx_mask, ofsAddr + TX_mask);
662 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
663 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
665 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
666 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
672 for (i = 0; i < brd->numPorts; i++, port++) {
675 port->tableAddr = baseAddr + Extern_table +
677 ofsAddr = port->tableAddr;
678 switch (brd->numPorts) {
680 writew(C320p8rx_mask, ofsAddr + RX_mask);
681 writew(C320p8tx_mask, ofsAddr + TX_mask);
682 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
683 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
684 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
685 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
689 writew(C320p16rx_mask, ofsAddr + RX_mask);
690 writew(C320p16tx_mask, ofsAddr + TX_mask);
691 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
692 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
693 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
694 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
698 writew(C320p24rx_mask, ofsAddr + RX_mask);
699 writew(C320p24tx_mask, ofsAddr + TX_mask);
700 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
701 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
702 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
703 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
706 writew(C320p32rx_mask, ofsAddr + RX_mask);
707 writew(C320p32tx_mask, ofsAddr + TX_mask);
708 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
709 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
710 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
711 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
712 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
721 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
723 void *ptr = fw->data;
727 unsigned int a, lenp, lencnt;
730 __le32 magic; /* 0x34303430 */
732 u8 type; /* UNIX = 3 */
733 u8 model; /* C218T=1, C320T=2, CP204=3 */
738 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
740 if (fw->size < MOXA_FW_HDRLEN) {
741 strcpy(rsn, "too short (even header won't fit)");
744 if (hdr->magic != cpu_to_le32(0x30343034)) {
745 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
748 if (hdr->type != 3) {
749 sprintf(rsn, "not for linux, type is %u", hdr->type);
752 if (moxa_check_fw_model(brd, hdr->model)) {
753 sprintf(rsn, "not for this card, model is %u", hdr->model);
757 len = MOXA_FW_HDRLEN;
758 lencnt = hdr->model == 2 ? 5 : 3;
759 for (a = 0; a < ARRAY_SIZE(lens); a++) {
760 lens[a] = le16_to_cpu(hdr->len[a]);
761 if (lens[a] && len + lens[a] <= fw->size &&
762 moxa_check_fw(&fw->data[len]))
763 printk(KERN_WARNING "MOXA firmware: unexpected input "
764 "at offset %u, but going on\n", (u32)len);
765 if (!lens[a] && a < lencnt) {
766 sprintf(rsn, "too few entries in fw file");
772 if (len != fw->size) {
773 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
778 ptr += MOXA_FW_HDRLEN;
781 strcpy(rsn, "read above");
783 ret = moxa_load_bios(brd, ptr, lens[lenp]);
787 /* we skip the tty section (lens[1]), since we don't need it */
788 ptr += lens[lenp] + lens[lenp + 1];
789 lenp += 2; /* comm */
791 if (hdr->model == 2) {
792 ret = moxa_load_320b(brd, ptr, lens[lenp]);
795 /* skip another tty */
796 ptr += lens[lenp] + lens[lenp + 1];
800 ret = moxa_load_code(brd, ptr, lens[lenp]);
806 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
810 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
812 const struct firmware *fw;
818 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
820 if (brd->ports == NULL) {
821 printk(KERN_ERR "cannot allocate memory for ports\n");
826 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
827 p->type = PORT_16550A;
828 p->close_delay = 5 * HZ / 10;
829 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
830 init_waitqueue_head(&p->open_wait);
833 switch (brd->boardType) {
834 case MOXA_BOARD_C218_ISA:
835 case MOXA_BOARD_C218_PCI:
836 file = "c218tunx.cod";
838 case MOXA_BOARD_CP204J:
839 file = "cp204unx.cod";
842 file = "c320tunx.cod";
846 ret = request_firmware(&fw, file, dev);
848 printk(KERN_ERR "request_firmware failed\n");
852 ret = moxa_load_fw(brd, fw);
854 release_firmware(fw);
859 spin_lock_bh(&moxa_lock);
861 if (!timer_pending(&moxaTimer))
862 mod_timer(&moxaTimer, jiffies + HZ / 50);
863 spin_unlock_bh(&moxa_lock);
872 static void moxa_board_deinit(struct moxa_board_conf *brd)
874 unsigned int a, opened;
876 mutex_lock(&moxa_openlock);
877 spin_lock_bh(&moxa_lock);
879 spin_unlock_bh(&moxa_lock);
881 /* pci hot-un-plug support */
882 for (a = 0; a < brd->numPorts; a++)
883 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
884 tty_hangup(brd->ports[a].tty);
887 for (a = 0; a < brd->numPorts; a++)
888 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
890 mutex_unlock(&moxa_openlock);
894 mutex_lock(&moxa_openlock);
897 iounmap(brd->basemem);
903 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
904 const struct pci_device_id *ent)
906 struct moxa_board_conf *board;
908 int board_type = ent->driver_data;
911 retval = pci_enable_device(pdev);
913 dev_err(&pdev->dev, "can't enable pci device\n");
917 for (i = 0; i < MAX_BOARDS; i++)
918 if (moxa_boards[i].basemem == NULL)
922 if (i >= MAX_BOARDS) {
923 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
924 "found. Board is ignored.\n", MAX_BOARDS);
928 board = &moxa_boards[i];
930 retval = pci_request_region(pdev, 2, "moxa-base");
932 dev_err(&pdev->dev, "can't request pci region 2\n");
936 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
937 if (board->basemem == NULL) {
938 dev_err(&pdev->dev, "can't remap io space 2\n");
942 board->boardType = board_type;
943 switch (board_type) {
944 case MOXA_BOARD_C218_ISA:
945 case MOXA_BOARD_C218_PCI:
949 case MOXA_BOARD_CP204J:
956 board->busType = MOXA_BUS_TYPE_PCI;
958 retval = moxa_init_board(board, &pdev->dev);
962 pci_set_drvdata(pdev, board);
964 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
965 moxa_brdname[board_type - 1], board->numPorts);
969 iounmap(board->basemem);
970 board->basemem = NULL;
972 pci_release_region(pdev, 2);
977 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
979 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
981 moxa_board_deinit(brd);
983 pci_release_region(pdev, 2);
986 static struct pci_driver moxa_pci_driver = {
988 .id_table = moxa_pcibrds,
989 .probe = moxa_pci_probe,
990 .remove = __devexit_p(moxa_pci_remove)
992 #endif /* CONFIG_PCI */
994 static int __init moxa_init(void)
996 unsigned int isabrds = 0;
999 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1001 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1005 moxaDriver->owner = THIS_MODULE;
1006 moxaDriver->name = "ttyMX";
1007 moxaDriver->major = ttymajor;
1008 moxaDriver->minor_start = 0;
1009 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1010 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1011 moxaDriver->init_termios = tty_std_termios;
1012 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1013 moxaDriver->init_termios.c_ispeed = 9600;
1014 moxaDriver->init_termios.c_ospeed = 9600;
1015 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1016 tty_set_operations(moxaDriver, &moxa_ops);
1018 if (tty_register_driver(moxaDriver)) {
1019 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1020 put_tty_driver(moxaDriver);
1024 /* Find the boards defined from module args. */
1027 struct moxa_board_conf *brd = moxa_boards;
1029 for (i = 0; i < MAX_BOARDS; i++) {
1032 if (type[i] == MOXA_BOARD_C218_ISA ||
1033 type[i] == MOXA_BOARD_C320_ISA) {
1034 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1035 isabrds + 1, moxa_brdname[type[i] - 1],
1037 brd->boardType = type[i];
1038 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1040 brd->busType = MOXA_BUS_TYPE_ISA;
1041 brd->basemem = ioremap(baseaddr[i], 0x4000);
1042 if (!brd->basemem) {
1043 printk(KERN_ERR "MOXA: can't remap %lx\n",
1047 if (moxa_init_board(brd, NULL)) {
1048 iounmap(brd->basemem);
1049 brd->basemem = NULL;
1053 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1054 "ready (%u ports, firmware loaded)\n",
1055 baseaddr[i], brd->numPorts);
1065 retval = pci_register_driver(&moxa_pci_driver);
1067 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1076 static void __exit moxa_exit(void)
1081 pci_unregister_driver(&moxa_pci_driver);
1084 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1085 if (moxa_boards[i].ready)
1086 moxa_board_deinit(&moxa_boards[i]);
1088 del_timer_sync(&moxaTimer);
1090 if (tty_unregister_driver(moxaDriver))
1091 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1093 put_tty_driver(moxaDriver);
1096 module_init(moxa_init);
1097 module_exit(moxa_exit);
1099 static void moxa_close_port(struct moxa_port *ch)
1102 MoxaPortFlushData(ch, 2);
1103 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1104 ch->tty->driver_data = NULL;
1108 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1109 struct moxa_port *ch)
1116 prepare_to_wait(&ch->open_wait, &wait, TASK_INTERRUPTIBLE);
1117 if (tty_hung_up_p(filp)) {
1118 #ifdef SERIAL_DO_RESTART
1119 retval = -ERESTARTSYS;
1125 spin_lock_bh(&moxa_lock);
1127 spin_unlock_bh(&moxa_lock);
1131 if (signal_pending(current)) {
1132 retval = -ERESTARTSYS;
1137 finish_wait(&ch->open_wait, &wait);
1142 static int moxa_open(struct tty_struct *tty, struct file *filp)
1144 struct moxa_board_conf *brd;
1145 struct moxa_port *ch;
1150 if (port == MAX_PORTS) {
1151 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1153 if (mutex_lock_interruptible(&moxa_openlock))
1154 return -ERESTARTSYS;
1155 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1157 mutex_unlock(&moxa_openlock);
1161 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1163 tty->driver_data = ch;
1165 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
1166 ch->statusflags = 0;
1167 moxa_set_tty_param(tty, tty->termios);
1168 MoxaPortLineCtrl(ch, 1, 1);
1170 MoxaSetFifo(ch, ch->type == PORT_16550A);
1171 ch->asyncflags |= ASYNC_INITIALIZED;
1173 mutex_unlock(&moxa_openlock);
1176 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1177 retval = moxa_block_till_ready(tty, filp, ch);
1178 mutex_lock(&moxa_openlock);
1180 if (ch->count) /* 0 means already hung up... */
1181 if (--ch->count == 0)
1182 moxa_close_port(ch);
1184 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1185 mutex_unlock(&moxa_openlock);
1190 static void moxa_close(struct tty_struct *tty, struct file *filp)
1192 struct moxa_port *ch;
1196 if (port == MAX_PORTS || tty_hung_up_p(filp))
1199 mutex_lock(&moxa_openlock);
1200 ch = tty->driver_data;
1203 if (tty->count == 1 && ch->count != 1) {
1204 printk(KERN_WARNING "moxa_close: bad serial port count; "
1205 "tty->count is 1, ch->count is %d\n", ch->count);
1208 if (--ch->count < 0) {
1209 printk(KERN_WARNING "moxa_close: bad serial port count, "
1210 "device=%s\n", tty->name);
1216 ch->cflag = tty->termios->c_cflag;
1217 if (ch->asyncflags & ASYNC_INITIALIZED) {
1218 moxa_setup_empty_event(tty);
1219 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1222 moxa_close_port(ch);
1224 mutex_unlock(&moxa_openlock);
1227 static int moxa_write(struct tty_struct *tty,
1228 const unsigned char *buf, int count)
1230 struct moxa_port *ch = tty->driver_data;
1236 spin_lock_bh(&moxa_lock);
1237 len = MoxaPortWriteData(ch, buf, count);
1238 spin_unlock_bh(&moxa_lock);
1240 ch->statusflags |= LOWWAIT;
1244 static int moxa_write_room(struct tty_struct *tty)
1246 struct moxa_port *ch;
1250 ch = tty->driver_data;
1253 return MoxaPortTxFree(ch);
1256 static void moxa_flush_buffer(struct tty_struct *tty)
1258 struct moxa_port *ch = tty->driver_data;
1262 MoxaPortFlushData(ch, 1);
1266 static int moxa_chars_in_buffer(struct tty_struct *tty)
1268 struct moxa_port *ch = tty->driver_data;
1272 * Sigh...I have to check if driver_data is NULL here, because
1273 * if an open() fails, the TTY subsystem eventually calls
1274 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1275 * routine. And since the open() failed, we return 0 here. TDJ
1279 chars = MoxaPortTxQueue(ch);
1282 * Make it possible to wakeup anything waiting for output
1283 * in tty_ioctl.c, etc.
1285 if (!(ch->statusflags & EMPTYWAIT))
1286 moxa_setup_empty_event(tty);
1291 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1293 struct moxa_port *ch;
1294 int flag = 0, dtr, rts;
1296 mutex_lock(&moxa_openlock);
1297 ch = tty->driver_data;
1299 mutex_unlock(&moxa_openlock);
1303 MoxaPortGetLineOut(ch, &dtr, &rts);
1308 dtr = MoxaPortLineStatus(ch);
1315 mutex_unlock(&moxa_openlock);
1319 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1320 unsigned int set, unsigned int clear)
1322 struct moxa_port *ch;
1327 mutex_lock(&moxa_openlock);
1328 ch = tty->driver_data;
1330 mutex_unlock(&moxa_openlock);
1334 MoxaPortGetLineOut(ch, &dtr, &rts);
1335 if (set & TIOCM_RTS)
1337 if (set & TIOCM_DTR)
1339 if (clear & TIOCM_RTS)
1341 if (clear & TIOCM_DTR)
1343 MoxaPortLineCtrl(ch, dtr, rts);
1344 mutex_unlock(&moxa_openlock);
1348 static void moxa_throttle(struct tty_struct *tty)
1350 struct moxa_port *ch = tty->driver_data;
1352 ch->statusflags |= THROTTLE;
1355 static void moxa_unthrottle(struct tty_struct *tty)
1357 struct moxa_port *ch = tty->driver_data;
1359 ch->statusflags &= ~THROTTLE;
1362 static void moxa_set_termios(struct tty_struct *tty,
1363 struct ktermios *old_termios)
1365 struct moxa_port *ch = tty->driver_data;
1369 moxa_set_tty_param(tty, old_termios);
1370 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1371 wake_up_interruptible(&ch->open_wait);
1374 static void moxa_stop(struct tty_struct *tty)
1376 struct moxa_port *ch = tty->driver_data;
1380 MoxaPortTxDisable(ch);
1381 ch->statusflags |= TXSTOPPED;
1385 static void moxa_start(struct tty_struct *tty)
1387 struct moxa_port *ch = tty->driver_data;
1392 if (!(ch->statusflags & TXSTOPPED))
1395 MoxaPortTxEnable(ch);
1396 ch->statusflags &= ~TXSTOPPED;
1399 static void moxa_hangup(struct tty_struct *tty)
1401 struct moxa_port *ch;
1403 mutex_lock(&moxa_openlock);
1404 ch = tty->driver_data;
1406 mutex_unlock(&moxa_openlock);
1410 moxa_close_port(ch);
1411 mutex_unlock(&moxa_openlock);
1413 wake_up_interruptible(&ch->open_wait);
1416 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1420 if (dcd != p->DCDState && p->tty && C_CLOCAL(p->tty)) {
1427 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1430 struct tty_struct *tty = p->tty;
1431 void __iomem *ofsAddr;
1432 unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
1436 if ((p->statusflags & EMPTYWAIT) &&
1437 MoxaPortTxQueue(p) == 0) {
1438 p->statusflags &= ~EMPTYWAIT;
1441 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1442 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1443 p->statusflags &= ~LOWWAIT;
1447 if (inited && !(p->statusflags & THROTTLE) &&
1448 MoxaPortRxQueue(p) > 0) { /* RX */
1449 MoxaPortReadData(p);
1450 tty_schedule_flip(tty);
1453 p->statusflags &= ~EMPTYWAIT;
1454 MoxaPortFlushData(p, 0); /* flush RX */
1457 if (!handle) /* nothing else to do */
1460 intr = readw(ip); /* port irq status */
1464 writew(0, ip); /* ACK port */
1465 ofsAddr = p->tableAddr;
1466 if (intr & IntrTx) /* disable tx intr */
1467 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1468 ofsAddr + HostStat);
1473 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1474 tty_insert_flip_char(tty, 0, TTY_BREAK);
1475 tty_schedule_flip(tty);
1478 if (intr & IntrLine)
1479 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1484 static void moxa_poll(unsigned long ignored)
1486 struct moxa_board_conf *brd;
1488 unsigned int card, port, served = 0;
1490 spin_lock(&moxa_lock);
1491 for (card = 0; card < MAX_BOARDS; card++) {
1492 brd = &moxa_boards[card];
1499 if (readb(brd->intPend) == 0xff)
1500 ip = brd->intTable + readb(brd->intNdx);
1502 for (port = 0; port < brd->numPorts; port++)
1503 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1506 writeb(0, brd->intPend); /* ACK */
1508 if (moxaLowWaterChk) {
1509 struct moxa_port *p = brd->ports;
1510 for (port = 0; port < brd->numPorts; port++, p++)
1511 if (p->lowChkFlag) {
1513 moxa_low_water_check(p->tableAddr);
1517 moxaLowWaterChk = 0;
1520 mod_timer(&moxaTimer, jiffies + HZ / 50);
1521 spin_unlock(&moxa_lock);
1524 /******************************************************************************/
1526 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1528 register struct ktermios *ts = tty->termios;
1529 struct moxa_port *ch = tty->driver_data;
1530 int rts, cts, txflow, rxflow, xany, baud;
1532 rts = cts = txflow = rxflow = xany = 0;
1533 if (ts->c_cflag & CRTSCTS)
1535 if (ts->c_iflag & IXON)
1537 if (ts->c_iflag & IXOFF)
1539 if (ts->c_iflag & IXANY)
1542 /* Clear the features we don't support */
1543 ts->c_cflag &= ~CMSPAR;
1544 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1545 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1547 baud = tty_termios_baud_rate(old_termios);
1548 /* Not put the baud rate into the termios data */
1549 tty_encode_baud_rate(tty, baud, baud);
1552 static void moxa_setup_empty_event(struct tty_struct *tty)
1554 struct moxa_port *ch = tty->driver_data;
1556 spin_lock_bh(&moxa_lock);
1557 ch->statusflags |= EMPTYWAIT;
1558 spin_unlock_bh(&moxa_lock);
1561 static void moxa_shut_down(struct moxa_port *ch)
1563 struct tty_struct *tp = ch->tty;
1565 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1568 MoxaPortDisable(ch);
1571 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1574 MoxaPortLineCtrl(ch, 0, 0);
1576 spin_lock_bh(&moxa_lock);
1577 ch->asyncflags &= ~ASYNC_INITIALIZED;
1578 spin_unlock_bh(&moxa_lock);
1581 /*****************************************************************************
1582 * Driver level functions: *
1583 *****************************************************************************/
1585 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1587 void __iomem *ofsAddr;
1588 if (mode < 0 || mode > 2)
1590 ofsAddr = port->tableAddr;
1591 moxafunc(ofsAddr, FC_FlushQueue, mode);
1593 port->lowChkFlag = 0;
1594 moxa_low_water_check(ofsAddr);
1599 * Moxa Port Number Description:
1601 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1602 * the port number using in MOXA driver functions will be 0 to 31 for
1603 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1604 * to 127 for fourth. For example, if you setup three MOXA boards,
1605 * first board is C218, second board is C320-16 and third board is
1606 * C320-32. The port number of first board (C218 - 8 ports) is from
1607 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1608 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1609 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1610 * 127 will be invalid.
1613 * Moxa Functions Description:
1615 * Function 1: Driver initialization routine, this routine must be
1616 * called when initialized driver.
1618 * void MoxaDriverInit();
1621 * Function 2: Moxa driver private IOCTL command processing.
1623 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1625 * unsigned int cmd : IOCTL command
1626 * unsigned long arg : IOCTL argument
1627 * int port : port number (0 - 127)
1634 * Function 6: Enable this port to start Tx/Rx data.
1636 * void MoxaPortEnable(int port);
1637 * int port : port number (0 - 127)
1640 * Function 7: Disable this port
1642 * void MoxaPortDisable(int port);
1643 * int port : port number (0 - 127)
1646 * Function 10: Setting baud rate of this port.
1648 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1649 * int port : port number (0 - 127)
1650 * long baud : baud rate (50 - 115200)
1652 * return: 0 : this port is invalid or baud < 50
1653 * 50 - 115200 : the real baud rate set to the port, if
1654 * the argument baud is large than maximun
1655 * available baud rate, the real setting
1656 * baud rate will be the maximun baud rate.
1659 * Function 12: Configure the port.
1661 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1662 * int port : port number (0 - 127)
1663 * struct ktermios * termio : termio structure pointer
1664 * speed_t baud : baud rate
1666 * return: -1 : this port is invalid or termio == NULL
1670 * Function 13: Get the DTR/RTS state of this port.
1672 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1673 * int port : port number (0 - 127)
1674 * int * dtrState : pointer to INT to receive the current DTR
1675 * state. (if NULL, this function will not
1676 * write to this address)
1677 * int * rtsState : pointer to INT to receive the current RTS
1678 * state. (if NULL, this function will not
1679 * write to this address)
1681 * return: -1 : this port is invalid
1685 * Function 14: Setting the DTR/RTS output state of this port.
1687 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1688 * int port : port number (0 - 127)
1689 * int dtrState : DTR output state (0: off, 1: on)
1690 * int rtsState : RTS output state (0: off, 1: on)
1693 * Function 15: Setting the flow control of this port.
1695 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1696 * int txFlow,int xany);
1697 * int port : port number (0 - 127)
1698 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1699 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1700 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1701 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1702 * int xany : S/W XANY flow control (0: no, 1: yes)
1705 * Function 16: Get ths line status of this port
1707 * int MoxaPortLineStatus(int port);
1708 * int port : port number (0 - 127)
1710 * return: Bit 0 - CTS state (0: off, 1: on)
1711 * Bit 1 - DSR state (0: off, 1: on)
1712 * Bit 2 - DCD state (0: off, 1: on)
1715 * Function 19: Flush the Rx/Tx buffer data of this port.
1717 * void MoxaPortFlushData(int port, int mode);
1718 * int port : port number (0 - 127)
1720 * 0 : flush the Rx buffer
1721 * 1 : flush the Tx buffer
1722 * 2 : flush the Rx and Tx buffer
1725 * Function 20: Write data.
1727 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1728 * int port : port number (0 - 127)
1729 * unsigned char * buffer : pointer to write data buffer.
1730 * int length : write data length
1732 * return: 0 - length : real write data length
1735 * Function 21: Read data.
1737 * int MoxaPortReadData(int port, struct tty_struct *tty);
1738 * int port : port number (0 - 127)
1739 * struct tty_struct *tty : tty for data
1741 * return: 0 - length : real read data length
1744 * Function 24: Get the Tx buffer current queued data bytes
1746 * int MoxaPortTxQueue(int port);
1747 * int port : port number (0 - 127)
1749 * return: .. : Tx buffer current queued data bytes
1752 * Function 25: Get the Tx buffer current free space
1754 * int MoxaPortTxFree(int port);
1755 * int port : port number (0 - 127)
1757 * return: .. : Tx buffer current free space
1760 * Function 26: Get the Rx buffer current queued data bytes
1762 * int MoxaPortRxQueue(int port);
1763 * int port : port number (0 - 127)
1765 * return: .. : Rx buffer current queued data bytes
1768 * Function 28: Disable port data transmission.
1770 * void MoxaPortTxDisable(int port);
1771 * int port : port number (0 - 127)
1774 * Function 29: Enable port data transmission.
1776 * void MoxaPortTxEnable(int port);
1777 * int port : port number (0 - 127)
1780 * Function 31: Get the received BREAK signal count and reset it.
1782 * int MoxaPortResetBrkCnt(int port);
1783 * int port : port number (0 - 127)
1785 * return: 0 - .. : BREAK signal count
1790 static void MoxaPortEnable(struct moxa_port *port)
1792 void __iomem *ofsAddr;
1795 ofsAddr = port->tableAddr;
1796 writew(lowwater, ofsAddr + Low_water);
1797 if (MOXA_IS_320(port->board))
1798 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1800 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1801 ofsAddr + HostStat);
1803 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1804 moxafunc(ofsAddr, FC_FlushQueue, 2);
1806 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1807 MoxaPortLineStatus(port);
1810 static void MoxaPortDisable(struct moxa_port *port)
1812 void __iomem *ofsAddr = port->tableAddr;
1814 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1815 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1816 writew(0, ofsAddr + HostStat);
1817 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1820 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1822 void __iomem *ofsAddr = port->tableAddr;
1823 unsigned int clock, val;
1826 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1833 moxafunc(ofsAddr, FC_SetBaud, val);
1838 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1841 void __iomem *ofsAddr;
1845 ofsAddr = port->tableAddr;
1846 cflag = termio->c_cflag; /* termio->c_cflag */
1848 mode = termio->c_cflag & CSIZE;
1851 else if (mode == CS6)
1853 else if (mode == CS7)
1855 else if (mode == CS8)
1858 if (termio->c_cflag & CSTOPB) {
1866 if (termio->c_cflag & PARENB) {
1867 if (termio->c_cflag & PARODD)
1874 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1876 if (MOXA_IS_320(port->board) && baud >= 921600)
1879 baud = MoxaPortSetBaud(port, baud);
1881 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1882 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1883 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1884 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1885 moxa_wait_finish(ofsAddr);
1891 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1895 *dtrState = !!(port->lineCtrl & DTR_ON);
1897 *rtsState = !!(port->lineCtrl & RTS_ON);
1902 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1910 port->lineCtrl = mode;
1911 moxafunc(port->tableAddr, FC_LineControl, mode);
1914 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1915 int txflow, int rxflow, int txany)
1920 mode |= RTS_FlowCtl;
1922 mode |= CTS_FlowCtl;
1929 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1932 static int MoxaPortLineStatus(struct moxa_port *port)
1934 void __iomem *ofsAddr;
1937 ofsAddr = port->tableAddr;
1938 if (MOXA_IS_320(port->board)) {
1939 moxafunc(ofsAddr, FC_LineStatus, 0);
1940 val = readw(ofsAddr + FuncArg);
1942 val = readw(ofsAddr + FlagStat) >> 4;
1947 spin_lock_bh(&moxa_lock);
1948 moxa_new_dcdstate(port, val & 8);
1949 spin_unlock_bh(&moxa_lock);
1954 static int MoxaPortWriteData(struct moxa_port *port,
1955 const unsigned char *buffer, int len)
1957 void __iomem *baseAddr, *ofsAddr, *ofs;
1958 unsigned int c, total;
1959 u16 head, tail, tx_mask, spage, epage;
1960 u16 pageno, pageofs, bufhead;
1962 ofsAddr = port->tableAddr;
1963 baseAddr = port->board->basemem;
1964 tx_mask = readw(ofsAddr + TX_mask);
1965 spage = readw(ofsAddr + Page_txb);
1966 epage = readw(ofsAddr + EndPage_txb);
1967 tail = readw(ofsAddr + TXwptr);
1968 head = readw(ofsAddr + TXrptr);
1969 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1972 moxaLog.txcnt[port->tty->index] += c;
1974 if (spage == epage) {
1975 bufhead = readw(ofsAddr + Ofs_txb);
1976 writew(spage, baseAddr + Control_reg);
1979 len = head - tail - 1;
1981 len = tx_mask + 1 - tail;
1982 len = (c > len) ? len : c;
1983 ofs = baseAddr + DynPage_addr + bufhead + tail;
1984 memcpy_toio(ofs, buffer, len);
1986 tail = (tail + len) & tx_mask;
1990 pageno = spage + (tail >> 13);
1991 pageofs = tail & Page_mask;
1993 len = Page_size - pageofs;
1996 writeb(pageno, baseAddr + Control_reg);
1997 ofs = baseAddr + DynPage_addr + pageofs;
1998 memcpy_toio(ofs, buffer, len);
2000 if (++pageno == epage)
2005 tail = (tail + total) & tx_mask;
2007 writew(tail, ofsAddr + TXwptr);
2008 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2012 static int MoxaPortReadData(struct moxa_port *port)
2014 struct tty_struct *tty = port->tty;
2016 void __iomem *baseAddr, *ofsAddr, *ofs;
2017 unsigned int count, len, total;
2018 u16 tail, rx_mask, spage, epage;
2019 u16 pageno, pageofs, bufhead, head;
2021 ofsAddr = port->tableAddr;
2022 baseAddr = port->board->basemem;
2023 head = readw(ofsAddr + RXrptr);
2024 tail = readw(ofsAddr + RXwptr);
2025 rx_mask = readw(ofsAddr + RX_mask);
2026 spage = readw(ofsAddr + Page_rxb);
2027 epage = readw(ofsAddr + EndPage_rxb);
2028 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
2033 moxaLog.rxcnt[tty->index] += total;
2034 if (spage == epage) {
2035 bufhead = readw(ofsAddr + Ofs_rxb);
2036 writew(spage, baseAddr + Control_reg);
2038 ofs = baseAddr + DynPage_addr + bufhead + head;
2039 len = (tail >= head) ? (tail - head) :
2040 (rx_mask + 1 - head);
2041 len = tty_prepare_flip_string(tty, &dst,
2043 memcpy_fromio(dst, ofs, len);
2044 head = (head + len) & rx_mask;
2048 pageno = spage + (head >> 13);
2049 pageofs = head & Page_mask;
2051 writew(pageno, baseAddr + Control_reg);
2052 ofs = baseAddr + DynPage_addr + pageofs;
2053 len = tty_prepare_flip_string(tty, &dst,
2054 min(Page_size - pageofs, count));
2055 memcpy_fromio(dst, ofs, len);
2058 pageofs = (pageofs + len) & Page_mask;
2059 if (pageofs == 0 && ++pageno == epage)
2062 head = (head + total) & rx_mask;
2064 writew(head, ofsAddr + RXrptr);
2065 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2066 moxaLowWaterChk = 1;
2067 port->lowChkFlag = 1;
2073 static int MoxaPortTxQueue(struct moxa_port *port)
2075 void __iomem *ofsAddr = port->tableAddr;
2076 u16 rptr, wptr, mask;
2078 rptr = readw(ofsAddr + TXrptr);
2079 wptr = readw(ofsAddr + TXwptr);
2080 mask = readw(ofsAddr + TX_mask);
2081 return (wptr - rptr) & mask;
2084 static int MoxaPortTxFree(struct moxa_port *port)
2086 void __iomem *ofsAddr = port->tableAddr;
2087 u16 rptr, wptr, mask;
2089 rptr = readw(ofsAddr + TXrptr);
2090 wptr = readw(ofsAddr + TXwptr);
2091 mask = readw(ofsAddr + TX_mask);
2092 return mask - ((wptr - rptr) & mask);
2095 static int MoxaPortRxQueue(struct moxa_port *port)
2097 void __iomem *ofsAddr = port->tableAddr;
2098 u16 rptr, wptr, mask;
2100 rptr = readw(ofsAddr + RXrptr);
2101 wptr = readw(ofsAddr + RXwptr);
2102 mask = readw(ofsAddr + RX_mask);
2103 return (wptr - rptr) & mask;
2106 static void MoxaPortTxDisable(struct moxa_port *port)
2108 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2111 static void MoxaPortTxEnable(struct moxa_port *port)
2113 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2116 static int moxa_get_serial_info(struct moxa_port *info,
2117 struct serial_struct __user *retinfo)
2119 struct serial_struct tmp = {
2121 .line = info->tty->index,
2122 .flags = info->asyncflags,
2123 .baud_base = 921600,
2124 .close_delay = info->close_delay
2126 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2130 static int moxa_set_serial_info(struct moxa_port *info,
2131 struct serial_struct __user *new_info)
2133 struct serial_struct new_serial;
2135 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2138 if (new_serial.irq != 0 || new_serial.port != 0 ||
2139 new_serial.custom_divisor != 0 ||
2140 new_serial.baud_base != 921600)
2143 if (!capable(CAP_SYS_ADMIN)) {
2144 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2145 (info->asyncflags & ~ASYNC_USR_MASK)))
2148 info->close_delay = new_serial.close_delay * HZ / 100;
2150 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2151 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2153 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2155 info->type = new_serial.type;
2161 /*****************************************************************************
2162 * Static local functions: *
2163 *****************************************************************************/
2165 static void MoxaSetFifo(struct moxa_port *port, int enable)
2167 void __iomem *ofsAddr = port->tableAddr;
2170 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2171 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2173 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2174 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);