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;
142 u8 DCDState; /* Protected by the port lock */
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
158 #define SERIAL_DO_RESTART
160 #define WAKEUP_CHARS 256
162 static int ttymajor = MOXAMAJOR;
163 static struct mon_str moxaLog;
164 static unsigned int moxaFuncTout = HZ / 2;
165 static unsigned int moxaLowWaterChk;
166 static DEFINE_MUTEX(moxa_openlock);
167 /* Variables for insmod */
169 static unsigned long baseaddr[MAX_BOARDS];
170 static unsigned int type[MAX_BOARDS];
171 static unsigned int numports[MAX_BOARDS];
174 MODULE_AUTHOR("William Chen");
175 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
176 MODULE_LICENSE("GPL");
178 module_param_array(type, uint, NULL, 0);
179 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
180 module_param_array(baseaddr, ulong, NULL, 0);
181 MODULE_PARM_DESC(baseaddr, "base address");
182 module_param_array(numports, uint, NULL, 0);
183 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
185 module_param(ttymajor, int, 0);
190 static int moxa_open(struct tty_struct *, struct file *);
191 static void moxa_close(struct tty_struct *, struct file *);
192 static int moxa_write(struct tty_struct *, const unsigned char *, int);
193 static int moxa_write_room(struct tty_struct *);
194 static void moxa_flush_buffer(struct tty_struct *);
195 static int moxa_chars_in_buffer(struct tty_struct *);
196 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
197 static void moxa_stop(struct tty_struct *);
198 static void moxa_start(struct tty_struct *);
199 static void moxa_hangup(struct tty_struct *);
200 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
201 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
202 unsigned int set, unsigned int clear);
203 static void moxa_poll(unsigned long);
204 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
205 static void moxa_setup_empty_event(struct tty_struct *);
206 static void moxa_shutdown(struct tty_port *);
207 static int moxa_carrier_raised(struct tty_port *);
208 static void moxa_dtr_rts(struct tty_port *, int);
210 * moxa board interface functions:
212 static void MoxaPortEnable(struct moxa_port *);
213 static void MoxaPortDisable(struct moxa_port *);
214 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
215 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
216 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
217 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
218 static int MoxaPortLineStatus(struct moxa_port *);
219 static void MoxaPortFlushData(struct moxa_port *, int);
220 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
221 static int MoxaPortReadData(struct moxa_port *);
222 static int MoxaPortTxQueue(struct moxa_port *);
223 static int MoxaPortRxQueue(struct moxa_port *);
224 static int MoxaPortTxFree(struct moxa_port *);
225 static void MoxaPortTxDisable(struct moxa_port *);
226 static void MoxaPortTxEnable(struct moxa_port *);
227 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
228 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
229 static void MoxaSetFifo(struct moxa_port *port, int enable);
235 static DEFINE_SPINLOCK(moxafunc_lock);
237 static void moxa_wait_finish(void __iomem *ofsAddr)
239 unsigned long end = jiffies + moxaFuncTout;
241 while (readw(ofsAddr + FuncCode) != 0)
242 if (time_after(jiffies, end))
244 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
245 printk(KERN_WARNING "moxa function expired\n");
248 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
251 spin_lock_irqsave(&moxafunc_lock, flags);
252 writew(arg, ofsAddr + FuncArg);
253 writew(cmd, ofsAddr + FuncCode);
254 moxa_wait_finish(ofsAddr);
255 spin_unlock_irqrestore(&moxafunc_lock, flags);
258 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
262 spin_lock_irqsave(&moxafunc_lock, flags);
263 writew(arg, ofsAddr + FuncArg);
264 writew(cmd, ofsAddr + FuncCode);
265 moxa_wait_finish(ofsAddr);
266 ret = readw(ofsAddr + FuncArg);
267 spin_unlock_irqrestore(&moxafunc_lock, flags);
271 static void moxa_low_water_check(void __iomem *ofsAddr)
273 u16 rptr, wptr, mask, len;
275 if (readb(ofsAddr + FlagStat) & Xoff_state) {
276 rptr = readw(ofsAddr + RXrptr);
277 wptr = readw(ofsAddr + RXwptr);
278 mask = readw(ofsAddr + RX_mask);
279 len = (wptr - rptr) & mask;
280 if (len <= Low_water)
281 moxafunc(ofsAddr, FC_SendXon, 0);
289 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
290 unsigned int cmd, unsigned long arg)
292 struct moxa_port *ch = tty->driver_data;
293 void __user *argp = (void __user *)arg;
296 if (tty->index == MAX_PORTS) {
297 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
298 cmd != MOXA_GETMSTATUS)
304 case MOXA_GETDATACOUNT:
305 moxaLog.tick = jiffies;
306 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
309 case MOXA_FLUSH_QUEUE:
310 MoxaPortFlushData(ch, arg);
312 case MOXA_GET_IOQUEUE: {
313 struct moxaq_str __user *argm = argp;
314 struct moxaq_str tmp;
318 mutex_lock(&moxa_openlock);
319 for (i = 0; i < MAX_BOARDS; i++) {
320 p = moxa_boards[i].ports;
321 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
322 memset(&tmp, 0, sizeof(tmp));
323 if (moxa_boards[i].ready) {
324 tmp.inq = MoxaPortRxQueue(p);
325 tmp.outq = MoxaPortTxQueue(p);
327 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
328 mutex_unlock(&moxa_openlock);
333 mutex_unlock(&moxa_openlock);
335 } case MOXA_GET_OQUEUE:
336 status = MoxaPortTxQueue(ch);
337 ret = put_user(status, (unsigned long __user *)argp);
339 case MOXA_GET_IQUEUE:
340 status = MoxaPortRxQueue(ch);
341 ret = put_user(status, (unsigned long __user *)argp);
343 case MOXA_GETMSTATUS: {
344 struct mxser_mstatus __user *argm = argp;
345 struct mxser_mstatus tmp;
349 mutex_lock(&moxa_openlock);
350 for (i = 0; i < MAX_BOARDS; i++) {
351 p = moxa_boards[i].ports;
352 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
353 struct tty_struct *ttyp;
354 memset(&tmp, 0, sizeof(tmp));
355 if (!moxa_boards[i].ready)
358 status = MoxaPortLineStatus(p);
366 ttyp = tty_port_tty_get(&p->port);
367 if (!ttyp || !ttyp->termios)
368 tmp.cflag = p->cflag;
370 tmp.cflag = ttyp->termios->c_cflag;
373 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
374 mutex_unlock(&moxa_openlock);
379 mutex_unlock(&moxa_openlock);
383 mutex_lock(&ch->port.mutex);
384 ret = moxa_get_serial_info(ch, argp);
385 mutex_unlock(&ch->port.mutex);
388 mutex_lock(&ch->port.mutex);
389 ret = moxa_set_serial_info(ch, argp);
390 mutex_unlock(&ch->port.mutex);
398 static int moxa_break_ctl(struct tty_struct *tty, int state)
400 struct moxa_port *port = tty->driver_data;
402 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
407 static const struct tty_operations moxa_ops = {
411 .write_room = moxa_write_room,
412 .flush_buffer = moxa_flush_buffer,
413 .chars_in_buffer = moxa_chars_in_buffer,
415 .set_termios = moxa_set_termios,
418 .hangup = moxa_hangup,
419 .break_ctl = moxa_break_ctl,
420 .tiocmget = moxa_tiocmget,
421 .tiocmset = moxa_tiocmset,
424 static const struct tty_port_operations moxa_port_ops = {
425 .carrier_raised = moxa_carrier_raised,
426 .dtr_rts = moxa_dtr_rts,
427 .shutdown = moxa_shutdown,
430 static struct tty_driver *moxaDriver;
431 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
432 static DEFINE_SPINLOCK(moxa_lock);
438 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
440 switch (brd->boardType) {
441 case MOXA_BOARD_C218_ISA:
442 case MOXA_BOARD_C218_PCI:
446 case MOXA_BOARD_CP204J:
460 static int moxa_check_fw(const void *ptr)
462 const __le16 *lptr = ptr;
464 if (*lptr != cpu_to_le16(0x7980))
470 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
473 void __iomem *baseAddr = brd->basemem;
476 writeb(HW_reset, baseAddr + Control_reg); /* reset */
478 memset_io(baseAddr, 0, 4096);
479 memcpy_toio(baseAddr, buf, len); /* download BIOS */
480 writeb(0, baseAddr + Control_reg); /* restart */
484 switch (brd->boardType) {
485 case MOXA_BOARD_C218_ISA:
486 case MOXA_BOARD_C218_PCI:
487 tmp = readw(baseAddr + C218_key);
488 if (tmp != C218_KeyCode)
491 case MOXA_BOARD_CP204J:
492 tmp = readw(baseAddr + C218_key);
493 if (tmp != CP204J_KeyCode)
497 tmp = readw(baseAddr + C320_key);
498 if (tmp != C320_KeyCode)
500 tmp = readw(baseAddr + C320_status);
501 if (tmp != STS_init) {
502 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
503 "module not found\n");
511 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
515 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
518 void __iomem *baseAddr = brd->basemem;
521 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
525 writew(len - 7168 - 2, baseAddr + C320bapi_len);
526 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
527 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
528 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
529 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
534 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
537 void __iomem *baseAddr = brd->basemem;
538 const __le16 *uptr = ptr;
539 size_t wlen, len2, j;
540 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
541 unsigned int i, retry;
544 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
547 switch (brd->boardType) {
548 case MOXA_BOARD_CP204J:
549 case MOXA_BOARD_C218_ISA:
550 case MOXA_BOARD_C218_PCI:
552 loadbuf = C218_LoadBuf;
553 loadlen = C218DLoad_len;
554 checksum = C218check_sum;
555 checksum_ok = C218chksum_ok;
559 keycode = C320_KeyCode;
560 loadbuf = C320_LoadBuf;
561 loadlen = C320DLoad_len;
562 checksum = C320check_sum;
563 checksum_ok = C320chksum_ok;
569 for (i = 0; i < wlen; i++)
570 usum += le16_to_cpu(uptr[i]);
576 len2 = (wlen > 2048) ? 2048 : wlen;
578 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
581 writew(len2, baseAddr + loadlen);
582 writew(0, baseAddr + key);
583 for (i = 0; i < 100; i++) {
584 if (readw(baseAddr + key) == keycode)
588 if (readw(baseAddr + key) != keycode)
591 writew(0, baseAddr + loadlen);
592 writew(usum, baseAddr + checksum);
593 writew(0, baseAddr + key);
594 for (i = 0; i < 100; i++) {
595 if (readw(baseAddr + key) == keycode)
600 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
601 if (readb(baseAddr + checksum_ok) != 1)
604 writew(0, baseAddr + key);
605 for (i = 0; i < 600; i++) {
606 if (readw(baseAddr + Magic_no) == Magic_code)
610 if (readw(baseAddr + Magic_no) != Magic_code)
613 if (MOXA_IS_320(brd)) {
614 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
615 writew(0x3800, baseAddr + TMS320_PORT1);
616 writew(0x3900, baseAddr + TMS320_PORT2);
617 writew(28499, baseAddr + TMS320_CLOCK);
619 writew(0x3200, baseAddr + TMS320_PORT1);
620 writew(0x3400, baseAddr + TMS320_PORT2);
621 writew(19999, baseAddr + TMS320_CLOCK);
624 writew(1, baseAddr + Disable_IRQ);
625 writew(0, baseAddr + Magic_no);
626 for (i = 0; i < 500; i++) {
627 if (readw(baseAddr + Magic_no) == Magic_code)
631 if (readw(baseAddr + Magic_no) != Magic_code)
634 if (MOXA_IS_320(brd)) {
635 j = readw(baseAddr + Module_cnt);
638 brd->numPorts = j * 8;
639 writew(j, baseAddr + Module_no);
640 writew(0, baseAddr + Magic_no);
641 for (i = 0; i < 600; i++) {
642 if (readw(baseAddr + Magic_no) == Magic_code)
646 if (readw(baseAddr + Magic_no) != Magic_code)
649 brd->intNdx = baseAddr + IRQindex;
650 brd->intPend = baseAddr + IRQpending;
651 brd->intTable = baseAddr + IRQtable;
656 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
659 void __iomem *ofsAddr, *baseAddr = brd->basemem;
660 struct moxa_port *port;
664 printk(KERN_ERR "MOXA: bios length is not even\n");
668 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
672 switch (brd->boardType) {
673 case MOXA_BOARD_C218_ISA:
674 case MOXA_BOARD_C218_PCI:
675 case MOXA_BOARD_CP204J:
677 for (i = 0; i < brd->numPorts; i++, port++) {
680 port->tableAddr = baseAddr + Extern_table +
682 ofsAddr = port->tableAddr;
683 writew(C218rx_mask, ofsAddr + RX_mask);
684 writew(C218tx_mask, ofsAddr + TX_mask);
685 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
686 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
688 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
689 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
695 for (i = 0; i < brd->numPorts; i++, port++) {
698 port->tableAddr = baseAddr + Extern_table +
700 ofsAddr = port->tableAddr;
701 switch (brd->numPorts) {
703 writew(C320p8rx_mask, ofsAddr + RX_mask);
704 writew(C320p8tx_mask, ofsAddr + TX_mask);
705 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
706 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
707 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
708 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
712 writew(C320p16rx_mask, ofsAddr + RX_mask);
713 writew(C320p16tx_mask, ofsAddr + TX_mask);
714 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
715 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
716 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
717 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
721 writew(C320p24rx_mask, ofsAddr + RX_mask);
722 writew(C320p24tx_mask, ofsAddr + TX_mask);
723 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
724 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
725 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
726 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
729 writew(C320p32rx_mask, ofsAddr + RX_mask);
730 writew(C320p32tx_mask, ofsAddr + TX_mask);
731 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
732 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
733 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
734 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
735 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
744 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
746 const void *ptr = fw->data;
750 unsigned int a, lenp, lencnt;
753 __le32 magic; /* 0x34303430 */
755 u8 type; /* UNIX = 3 */
756 u8 model; /* C218T=1, C320T=2, CP204=3 */
761 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
763 if (fw->size < MOXA_FW_HDRLEN) {
764 strcpy(rsn, "too short (even header won't fit)");
767 if (hdr->magic != cpu_to_le32(0x30343034)) {
768 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
771 if (hdr->type != 3) {
772 sprintf(rsn, "not for linux, type is %u", hdr->type);
775 if (moxa_check_fw_model(brd, hdr->model)) {
776 sprintf(rsn, "not for this card, model is %u", hdr->model);
780 len = MOXA_FW_HDRLEN;
781 lencnt = hdr->model == 2 ? 5 : 3;
782 for (a = 0; a < ARRAY_SIZE(lens); a++) {
783 lens[a] = le16_to_cpu(hdr->len[a]);
784 if (lens[a] && len + lens[a] <= fw->size &&
785 moxa_check_fw(&fw->data[len]))
786 printk(KERN_WARNING "MOXA firmware: unexpected input "
787 "at offset %u, but going on\n", (u32)len);
788 if (!lens[a] && a < lencnt) {
789 sprintf(rsn, "too few entries in fw file");
795 if (len != fw->size) {
796 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
801 ptr += MOXA_FW_HDRLEN;
804 strcpy(rsn, "read above");
806 ret = moxa_load_bios(brd, ptr, lens[lenp]);
810 /* we skip the tty section (lens[1]), since we don't need it */
811 ptr += lens[lenp] + lens[lenp + 1];
812 lenp += 2; /* comm */
814 if (hdr->model == 2) {
815 ret = moxa_load_320b(brd, ptr, lens[lenp]);
818 /* skip another tty */
819 ptr += lens[lenp] + lens[lenp + 1];
823 ret = moxa_load_code(brd, ptr, lens[lenp]);
829 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
833 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
835 const struct firmware *fw;
841 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
843 if (brd->ports == NULL) {
844 printk(KERN_ERR "cannot allocate memory for ports\n");
849 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
850 tty_port_init(&p->port);
851 p->port.ops = &moxa_port_ops;
852 p->type = PORT_16550A;
853 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
856 switch (brd->boardType) {
857 case MOXA_BOARD_C218_ISA:
858 case MOXA_BOARD_C218_PCI:
859 file = "c218tunx.cod";
861 case MOXA_BOARD_CP204J:
862 file = "cp204unx.cod";
865 file = "c320tunx.cod";
869 ret = request_firmware(&fw, file, dev);
871 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
872 "you've placed '%s' file into your firmware "
873 "loader directory (e.g. /lib/firmware)\n",
878 ret = moxa_load_fw(brd, fw);
880 release_firmware(fw);
885 spin_lock_bh(&moxa_lock);
887 if (!timer_pending(&moxaTimer))
888 mod_timer(&moxaTimer, jiffies + HZ / 50);
889 spin_unlock_bh(&moxa_lock);
898 static void moxa_board_deinit(struct moxa_board_conf *brd)
900 unsigned int a, opened;
902 mutex_lock(&moxa_openlock);
903 spin_lock_bh(&moxa_lock);
905 spin_unlock_bh(&moxa_lock);
907 /* pci hot-un-plug support */
908 for (a = 0; a < brd->numPorts; a++)
909 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
910 struct tty_struct *tty = tty_port_tty_get(
911 &brd->ports[a].port);
919 for (a = 0; a < brd->numPorts; a++)
920 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
922 mutex_unlock(&moxa_openlock);
926 mutex_lock(&moxa_openlock);
929 iounmap(brd->basemem);
935 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
936 const struct pci_device_id *ent)
938 struct moxa_board_conf *board;
940 int board_type = ent->driver_data;
943 retval = pci_enable_device(pdev);
945 dev_err(&pdev->dev, "can't enable pci device\n");
949 for (i = 0; i < MAX_BOARDS; i++)
950 if (moxa_boards[i].basemem == NULL)
954 if (i >= MAX_BOARDS) {
955 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
956 "found. Board is ignored.\n", MAX_BOARDS);
960 board = &moxa_boards[i];
962 retval = pci_request_region(pdev, 2, "moxa-base");
964 dev_err(&pdev->dev, "can't request pci region 2\n");
968 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
969 if (board->basemem == NULL) {
970 dev_err(&pdev->dev, "can't remap io space 2\n");
974 board->boardType = board_type;
975 switch (board_type) {
976 case MOXA_BOARD_C218_ISA:
977 case MOXA_BOARD_C218_PCI:
981 case MOXA_BOARD_CP204J:
988 board->busType = MOXA_BUS_TYPE_PCI;
990 retval = moxa_init_board(board, &pdev->dev);
994 pci_set_drvdata(pdev, board);
996 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
997 moxa_brdname[board_type - 1], board->numPorts);
1001 iounmap(board->basemem);
1002 board->basemem = NULL;
1004 pci_release_region(pdev, 2);
1009 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1011 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1013 moxa_board_deinit(brd);
1015 pci_release_region(pdev, 2);
1018 static struct pci_driver moxa_pci_driver = {
1020 .id_table = moxa_pcibrds,
1021 .probe = moxa_pci_probe,
1022 .remove = __devexit_p(moxa_pci_remove)
1024 #endif /* CONFIG_PCI */
1026 static int __init moxa_init(void)
1028 unsigned int isabrds = 0;
1031 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1033 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1037 moxaDriver->owner = THIS_MODULE;
1038 moxaDriver->name = "ttyMX";
1039 moxaDriver->major = ttymajor;
1040 moxaDriver->minor_start = 0;
1041 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1042 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1043 moxaDriver->init_termios = tty_std_termios;
1044 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1045 moxaDriver->init_termios.c_ispeed = 9600;
1046 moxaDriver->init_termios.c_ospeed = 9600;
1047 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1048 tty_set_operations(moxaDriver, &moxa_ops);
1050 if (tty_register_driver(moxaDriver)) {
1051 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1052 put_tty_driver(moxaDriver);
1056 /* Find the boards defined from module args. */
1059 struct moxa_board_conf *brd = moxa_boards;
1061 for (i = 0; i < MAX_BOARDS; i++) {
1064 if (type[i] == MOXA_BOARD_C218_ISA ||
1065 type[i] == MOXA_BOARD_C320_ISA) {
1066 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1067 isabrds + 1, moxa_brdname[type[i] - 1],
1069 brd->boardType = type[i];
1070 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1072 brd->busType = MOXA_BUS_TYPE_ISA;
1073 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1074 if (!brd->basemem) {
1075 printk(KERN_ERR "MOXA: can't remap %lx\n",
1079 if (moxa_init_board(brd, NULL)) {
1080 iounmap(brd->basemem);
1081 brd->basemem = NULL;
1085 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1086 "ready (%u ports, firmware loaded)\n",
1087 baseaddr[i], brd->numPorts);
1097 retval = pci_register_driver(&moxa_pci_driver);
1099 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1108 static void __exit moxa_exit(void)
1113 pci_unregister_driver(&moxa_pci_driver);
1116 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1117 if (moxa_boards[i].ready)
1118 moxa_board_deinit(&moxa_boards[i]);
1120 del_timer_sync(&moxaTimer);
1122 if (tty_unregister_driver(moxaDriver))
1123 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1125 put_tty_driver(moxaDriver);
1128 module_init(moxa_init);
1129 module_exit(moxa_exit);
1131 static void moxa_shutdown(struct tty_port *port)
1133 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1134 MoxaPortDisable(ch);
1135 MoxaPortFlushData(ch, 2);
1136 clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
1139 static int moxa_carrier_raised(struct tty_port *port)
1141 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1144 spin_lock_irq(&port->lock);
1146 spin_unlock_irq(&port->lock);
1150 static void moxa_dtr_rts(struct tty_port *port, int onoff)
1152 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1153 MoxaPortLineCtrl(ch, onoff, onoff);
1157 static int moxa_open(struct tty_struct *tty, struct file *filp)
1159 struct moxa_board_conf *brd;
1160 struct moxa_port *ch;
1165 if (port == MAX_PORTS) {
1166 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1168 if (mutex_lock_interruptible(&moxa_openlock))
1169 return -ERESTARTSYS;
1170 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1172 mutex_unlock(&moxa_openlock);
1176 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1177 mutex_unlock(&moxa_openlock);
1181 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1183 tty->driver_data = ch;
1184 tty_port_tty_set(&ch->port, tty);
1185 mutex_lock(&ch->port.mutex);
1186 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1187 ch->statusflags = 0;
1188 moxa_set_tty_param(tty, tty->termios);
1189 MoxaPortLineCtrl(ch, 1, 1);
1191 MoxaSetFifo(ch, ch->type == PORT_16550A);
1192 ch->port.flags |= ASYNC_INITIALIZED;
1194 mutex_unlock(&ch->port.mutex);
1195 mutex_unlock(&moxa_openlock);
1197 retval = tty_port_block_til_ready(&ch->port, tty, filp);
1199 set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
1203 static void moxa_close(struct tty_struct *tty, struct file *filp)
1205 struct moxa_port *ch = tty->driver_data;
1206 ch->cflag = tty->termios->c_cflag;
1207 tty_port_close(&ch->port, tty, filp);
1210 static int moxa_write(struct tty_struct *tty,
1211 const unsigned char *buf, int count)
1213 struct moxa_port *ch = tty->driver_data;
1219 spin_lock_bh(&moxa_lock);
1220 len = MoxaPortWriteData(tty, buf, count);
1221 spin_unlock_bh(&moxa_lock);
1223 set_bit(LOWWAIT, &ch->statusflags);
1227 static int moxa_write_room(struct tty_struct *tty)
1229 struct moxa_port *ch;
1233 ch = tty->driver_data;
1236 return MoxaPortTxFree(ch);
1239 static void moxa_flush_buffer(struct tty_struct *tty)
1241 struct moxa_port *ch = tty->driver_data;
1245 MoxaPortFlushData(ch, 1);
1249 static int moxa_chars_in_buffer(struct tty_struct *tty)
1251 struct moxa_port *ch = tty->driver_data;
1255 chars = MoxaPortTxQueue(ch);
1258 * Make it possible to wakeup anything waiting for output
1259 * in tty_ioctl.c, etc.
1261 if (!test_bit(EMPTYWAIT, &ch->statusflags))
1262 moxa_setup_empty_event(tty);
1268 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1270 struct moxa_port *ch = tty->driver_data;
1271 int flag = 0, dtr, rts;
1273 MoxaPortGetLineOut(ch, &dtr, &rts);
1278 dtr = MoxaPortLineStatus(ch);
1288 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1289 unsigned int set, unsigned int clear)
1291 struct moxa_port *ch;
1296 mutex_lock(&moxa_openlock);
1297 ch = tty->driver_data;
1299 mutex_unlock(&moxa_openlock);
1303 MoxaPortGetLineOut(ch, &dtr, &rts);
1304 if (set & TIOCM_RTS)
1306 if (set & TIOCM_DTR)
1308 if (clear & TIOCM_RTS)
1310 if (clear & TIOCM_DTR)
1312 MoxaPortLineCtrl(ch, dtr, rts);
1313 mutex_unlock(&moxa_openlock);
1317 static void moxa_set_termios(struct tty_struct *tty,
1318 struct ktermios *old_termios)
1320 struct moxa_port *ch = tty->driver_data;
1324 moxa_set_tty_param(tty, old_termios);
1325 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1326 wake_up_interruptible(&ch->port.open_wait);
1329 static void moxa_stop(struct tty_struct *tty)
1331 struct moxa_port *ch = tty->driver_data;
1335 MoxaPortTxDisable(ch);
1336 set_bit(TXSTOPPED, &ch->statusflags);
1340 static void moxa_start(struct tty_struct *tty)
1342 struct moxa_port *ch = tty->driver_data;
1347 if (!(ch->statusflags & TXSTOPPED))
1350 MoxaPortTxEnable(ch);
1351 clear_bit(TXSTOPPED, &ch->statusflags);
1354 static void moxa_hangup(struct tty_struct *tty)
1356 struct moxa_port *ch = tty->driver_data;
1357 tty_port_hangup(&ch->port);
1360 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1362 struct tty_struct *tty;
1363 unsigned long flags;
1366 spin_lock_irqsave(&p->port.lock, flags);
1367 if (dcd != p->DCDState) {
1369 spin_unlock_irqrestore(&p->port.lock, flags);
1370 tty = tty_port_tty_get(&p->port);
1371 if (tty && C_CLOCAL(tty) && !dcd)
1376 spin_unlock_irqrestore(&p->port.lock, flags);
1379 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1382 struct tty_struct *tty = tty_port_tty_get(&p->port);
1383 void __iomem *ofsAddr;
1384 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1388 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1389 MoxaPortTxQueue(p) == 0) {
1390 clear_bit(EMPTYWAIT, &p->statusflags);
1393 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1394 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1395 clear_bit(LOWWAIT, &p->statusflags);
1399 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
1400 MoxaPortRxQueue(p) > 0) { /* RX */
1401 MoxaPortReadData(p);
1402 tty_schedule_flip(tty);
1405 clear_bit(EMPTYWAIT, &p->statusflags);
1406 MoxaPortFlushData(p, 0); /* flush RX */
1409 if (!handle) /* nothing else to do */
1412 intr = readw(ip); /* port irq status */
1416 writew(0, ip); /* ACK port */
1417 ofsAddr = p->tableAddr;
1418 if (intr & IntrTx) /* disable tx intr */
1419 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1420 ofsAddr + HostStat);
1425 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1426 tty_insert_flip_char(tty, 0, TTY_BREAK);
1427 tty_schedule_flip(tty);
1430 if (intr & IntrLine)
1431 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1438 static void moxa_poll(unsigned long ignored)
1440 struct moxa_board_conf *brd;
1442 unsigned int card, port, served = 0;
1444 spin_lock(&moxa_lock);
1445 for (card = 0; card < MAX_BOARDS; card++) {
1446 brd = &moxa_boards[card];
1453 if (readb(brd->intPend) == 0xff)
1454 ip = brd->intTable + readb(brd->intNdx);
1456 for (port = 0; port < brd->numPorts; port++)
1457 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1460 writeb(0, brd->intPend); /* ACK */
1462 if (moxaLowWaterChk) {
1463 struct moxa_port *p = brd->ports;
1464 for (port = 0; port < brd->numPorts; port++, p++)
1465 if (p->lowChkFlag) {
1467 moxa_low_water_check(p->tableAddr);
1471 moxaLowWaterChk = 0;
1474 mod_timer(&moxaTimer, jiffies + HZ / 50);
1475 spin_unlock(&moxa_lock);
1478 /******************************************************************************/
1480 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1482 register struct ktermios *ts = tty->termios;
1483 struct moxa_port *ch = tty->driver_data;
1484 int rts, cts, txflow, rxflow, xany, baud;
1486 rts = cts = txflow = rxflow = xany = 0;
1487 if (ts->c_cflag & CRTSCTS)
1489 if (ts->c_iflag & IXON)
1491 if (ts->c_iflag & IXOFF)
1493 if (ts->c_iflag & IXANY)
1496 /* Clear the features we don't support */
1497 ts->c_cflag &= ~CMSPAR;
1498 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1499 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1501 baud = tty_termios_baud_rate(old_termios);
1502 /* Not put the baud rate into the termios data */
1503 tty_encode_baud_rate(tty, baud, baud);
1506 static void moxa_setup_empty_event(struct tty_struct *tty)
1508 struct moxa_port *ch = tty->driver_data;
1509 set_bit(EMPTYWAIT, &ch->statusflags);
1512 /*****************************************************************************
1513 * Driver level functions: *
1514 *****************************************************************************/
1516 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1518 void __iomem *ofsAddr;
1519 if (mode < 0 || mode > 2)
1521 ofsAddr = port->tableAddr;
1522 moxafunc(ofsAddr, FC_FlushQueue, mode);
1524 port->lowChkFlag = 0;
1525 moxa_low_water_check(ofsAddr);
1530 * Moxa Port Number Description:
1532 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1533 * the port number using in MOXA driver functions will be 0 to 31 for
1534 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1535 * to 127 for fourth. For example, if you setup three MOXA boards,
1536 * first board is C218, second board is C320-16 and third board is
1537 * C320-32. The port number of first board (C218 - 8 ports) is from
1538 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1539 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1540 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1541 * 127 will be invalid.
1544 * Moxa Functions Description:
1546 * Function 1: Driver initialization routine, this routine must be
1547 * called when initialized driver.
1549 * void MoxaDriverInit();
1552 * Function 2: Moxa driver private IOCTL command processing.
1554 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1556 * unsigned int cmd : IOCTL command
1557 * unsigned long arg : IOCTL argument
1558 * int port : port number (0 - 127)
1565 * Function 6: Enable this port to start Tx/Rx data.
1567 * void MoxaPortEnable(int port);
1568 * int port : port number (0 - 127)
1571 * Function 7: Disable this port
1573 * void MoxaPortDisable(int port);
1574 * int port : port number (0 - 127)
1577 * Function 10: Setting baud rate of this port.
1579 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1580 * int port : port number (0 - 127)
1581 * long baud : baud rate (50 - 115200)
1583 * return: 0 : this port is invalid or baud < 50
1584 * 50 - 115200 : the real baud rate set to the port, if
1585 * the argument baud is large than maximun
1586 * available baud rate, the real setting
1587 * baud rate will be the maximun baud rate.
1590 * Function 12: Configure the port.
1592 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1593 * int port : port number (0 - 127)
1594 * struct ktermios * termio : termio structure pointer
1595 * speed_t baud : baud rate
1597 * return: -1 : this port is invalid or termio == NULL
1601 * Function 13: Get the DTR/RTS state of this port.
1603 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1604 * int port : port number (0 - 127)
1605 * int * dtrState : pointer to INT to receive the current DTR
1606 * state. (if NULL, this function will not
1607 * write to this address)
1608 * int * rtsState : pointer to INT to receive the current RTS
1609 * state. (if NULL, this function will not
1610 * write to this address)
1612 * return: -1 : this port is invalid
1616 * Function 14: Setting the DTR/RTS output state of this port.
1618 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1619 * int port : port number (0 - 127)
1620 * int dtrState : DTR output state (0: off, 1: on)
1621 * int rtsState : RTS output state (0: off, 1: on)
1624 * Function 15: Setting the flow control of this port.
1626 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1627 * int txFlow,int xany);
1628 * int port : port number (0 - 127)
1629 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1630 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1631 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1632 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1633 * int xany : S/W XANY flow control (0: no, 1: yes)
1636 * Function 16: Get ths line status of this port
1638 * int MoxaPortLineStatus(int port);
1639 * int port : port number (0 - 127)
1641 * return: Bit 0 - CTS state (0: off, 1: on)
1642 * Bit 1 - DSR state (0: off, 1: on)
1643 * Bit 2 - DCD state (0: off, 1: on)
1646 * Function 19: Flush the Rx/Tx buffer data of this port.
1648 * void MoxaPortFlushData(int port, int mode);
1649 * int port : port number (0 - 127)
1651 * 0 : flush the Rx buffer
1652 * 1 : flush the Tx buffer
1653 * 2 : flush the Rx and Tx buffer
1656 * Function 20: Write data.
1658 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1659 * int port : port number (0 - 127)
1660 * unsigned char * buffer : pointer to write data buffer.
1661 * int length : write data length
1663 * return: 0 - length : real write data length
1666 * Function 21: Read data.
1668 * int MoxaPortReadData(int port, struct tty_struct *tty);
1669 * int port : port number (0 - 127)
1670 * struct tty_struct *tty : tty for data
1672 * return: 0 - length : real read data length
1675 * Function 24: Get the Tx buffer current queued data bytes
1677 * int MoxaPortTxQueue(int port);
1678 * int port : port number (0 - 127)
1680 * return: .. : Tx buffer current queued data bytes
1683 * Function 25: Get the Tx buffer current free space
1685 * int MoxaPortTxFree(int port);
1686 * int port : port number (0 - 127)
1688 * return: .. : Tx buffer current free space
1691 * Function 26: Get the Rx buffer current queued data bytes
1693 * int MoxaPortRxQueue(int port);
1694 * int port : port number (0 - 127)
1696 * return: .. : Rx buffer current queued data bytes
1699 * Function 28: Disable port data transmission.
1701 * void MoxaPortTxDisable(int port);
1702 * int port : port number (0 - 127)
1705 * Function 29: Enable port data transmission.
1707 * void MoxaPortTxEnable(int port);
1708 * int port : port number (0 - 127)
1711 * Function 31: Get the received BREAK signal count and reset it.
1713 * int MoxaPortResetBrkCnt(int port);
1714 * int port : port number (0 - 127)
1716 * return: 0 - .. : BREAK signal count
1721 static void MoxaPortEnable(struct moxa_port *port)
1723 void __iomem *ofsAddr;
1726 ofsAddr = port->tableAddr;
1727 writew(lowwater, ofsAddr + Low_water);
1728 if (MOXA_IS_320(port->board))
1729 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1731 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1732 ofsAddr + HostStat);
1734 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1735 moxafunc(ofsAddr, FC_FlushQueue, 2);
1737 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1738 MoxaPortLineStatus(port);
1741 static void MoxaPortDisable(struct moxa_port *port)
1743 void __iomem *ofsAddr = port->tableAddr;
1745 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1746 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1747 writew(0, ofsAddr + HostStat);
1748 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1751 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1753 void __iomem *ofsAddr = port->tableAddr;
1754 unsigned int clock, val;
1757 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1764 moxafunc(ofsAddr, FC_SetBaud, val);
1769 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1772 void __iomem *ofsAddr;
1776 ofsAddr = port->tableAddr;
1777 cflag = termio->c_cflag; /* termio->c_cflag */
1779 mode = termio->c_cflag & CSIZE;
1782 else if (mode == CS6)
1784 else if (mode == CS7)
1786 else if (mode == CS8)
1789 if (termio->c_cflag & CSTOPB) {
1797 if (termio->c_cflag & PARENB) {
1798 if (termio->c_cflag & PARODD)
1805 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1807 if (MOXA_IS_320(port->board) && baud >= 921600)
1810 baud = MoxaPortSetBaud(port, baud);
1812 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1813 spin_lock_irq(&moxafunc_lock);
1814 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1815 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1816 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1817 moxa_wait_finish(ofsAddr);
1818 spin_unlock_irq(&moxafunc_lock);
1824 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1828 *dtrState = !!(port->lineCtrl & DTR_ON);
1830 *rtsState = !!(port->lineCtrl & RTS_ON);
1835 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1843 port->lineCtrl = mode;
1844 moxafunc(port->tableAddr, FC_LineControl, mode);
1847 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1848 int txflow, int rxflow, int txany)
1853 mode |= RTS_FlowCtl;
1855 mode |= CTS_FlowCtl;
1862 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1865 static int MoxaPortLineStatus(struct moxa_port *port)
1867 void __iomem *ofsAddr;
1870 ofsAddr = port->tableAddr;
1871 if (MOXA_IS_320(port->board))
1872 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1874 val = readw(ofsAddr + FlagStat) >> 4;
1878 moxa_new_dcdstate(port, val & 8);
1883 static int MoxaPortWriteData(struct tty_struct *tty,
1884 const unsigned char *buffer, int len)
1886 struct moxa_port *port = tty->driver_data;
1887 void __iomem *baseAddr, *ofsAddr, *ofs;
1888 unsigned int c, total;
1889 u16 head, tail, tx_mask, spage, epage;
1890 u16 pageno, pageofs, bufhead;
1892 ofsAddr = port->tableAddr;
1893 baseAddr = port->board->basemem;
1894 tx_mask = readw(ofsAddr + TX_mask);
1895 spage = readw(ofsAddr + Page_txb);
1896 epage = readw(ofsAddr + EndPage_txb);
1897 tail = readw(ofsAddr + TXwptr);
1898 head = readw(ofsAddr + TXrptr);
1899 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1902 moxaLog.txcnt[port->port.tty->index] += c;
1904 if (spage == epage) {
1905 bufhead = readw(ofsAddr + Ofs_txb);
1906 writew(spage, baseAddr + Control_reg);
1909 len = head - tail - 1;
1911 len = tx_mask + 1 - tail;
1912 len = (c > len) ? len : c;
1913 ofs = baseAddr + DynPage_addr + bufhead + tail;
1914 memcpy_toio(ofs, buffer, len);
1916 tail = (tail + len) & tx_mask;
1920 pageno = spage + (tail >> 13);
1921 pageofs = tail & Page_mask;
1923 len = Page_size - pageofs;
1926 writeb(pageno, baseAddr + Control_reg);
1927 ofs = baseAddr + DynPage_addr + pageofs;
1928 memcpy_toio(ofs, buffer, len);
1930 if (++pageno == epage)
1935 tail = (tail + total) & tx_mask;
1937 writew(tail, ofsAddr + TXwptr);
1938 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1942 static int MoxaPortReadData(struct moxa_port *port)
1944 struct tty_struct *tty = port->port.tty;
1946 void __iomem *baseAddr, *ofsAddr, *ofs;
1947 unsigned int count, len, total;
1948 u16 tail, rx_mask, spage, epage;
1949 u16 pageno, pageofs, bufhead, head;
1951 ofsAddr = port->tableAddr;
1952 baseAddr = port->board->basemem;
1953 head = readw(ofsAddr + RXrptr);
1954 tail = readw(ofsAddr + RXwptr);
1955 rx_mask = readw(ofsAddr + RX_mask);
1956 spage = readw(ofsAddr + Page_rxb);
1957 epage = readw(ofsAddr + EndPage_rxb);
1958 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1963 moxaLog.rxcnt[tty->index] += total;
1964 if (spage == epage) {
1965 bufhead = readw(ofsAddr + Ofs_rxb);
1966 writew(spage, baseAddr + Control_reg);
1968 ofs = baseAddr + DynPage_addr + bufhead + head;
1969 len = (tail >= head) ? (tail - head) :
1970 (rx_mask + 1 - head);
1971 len = tty_prepare_flip_string(tty, &dst,
1973 memcpy_fromio(dst, ofs, len);
1974 head = (head + len) & rx_mask;
1978 pageno = spage + (head >> 13);
1979 pageofs = head & Page_mask;
1981 writew(pageno, baseAddr + Control_reg);
1982 ofs = baseAddr + DynPage_addr + pageofs;
1983 len = tty_prepare_flip_string(tty, &dst,
1984 min(Page_size - pageofs, count));
1985 memcpy_fromio(dst, ofs, len);
1988 pageofs = (pageofs + len) & Page_mask;
1989 if (pageofs == 0 && ++pageno == epage)
1992 head = (head + total) & rx_mask;
1994 writew(head, ofsAddr + RXrptr);
1995 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1996 moxaLowWaterChk = 1;
1997 port->lowChkFlag = 1;
2003 static int MoxaPortTxQueue(struct moxa_port *port)
2005 void __iomem *ofsAddr = port->tableAddr;
2006 u16 rptr, wptr, mask;
2008 rptr = readw(ofsAddr + TXrptr);
2009 wptr = readw(ofsAddr + TXwptr);
2010 mask = readw(ofsAddr + TX_mask);
2011 return (wptr - rptr) & mask;
2014 static int MoxaPortTxFree(struct moxa_port *port)
2016 void __iomem *ofsAddr = port->tableAddr;
2017 u16 rptr, wptr, mask;
2019 rptr = readw(ofsAddr + TXrptr);
2020 wptr = readw(ofsAddr + TXwptr);
2021 mask = readw(ofsAddr + TX_mask);
2022 return mask - ((wptr - rptr) & mask);
2025 static int MoxaPortRxQueue(struct moxa_port *port)
2027 void __iomem *ofsAddr = port->tableAddr;
2028 u16 rptr, wptr, mask;
2030 rptr = readw(ofsAddr + RXrptr);
2031 wptr = readw(ofsAddr + RXwptr);
2032 mask = readw(ofsAddr + RX_mask);
2033 return (wptr - rptr) & mask;
2036 static void MoxaPortTxDisable(struct moxa_port *port)
2038 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2041 static void MoxaPortTxEnable(struct moxa_port *port)
2043 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2046 static int moxa_get_serial_info(struct moxa_port *info,
2047 struct serial_struct __user *retinfo)
2049 struct serial_struct tmp = {
2051 .line = info->port.tty->index,
2052 .flags = info->port.flags,
2053 .baud_base = 921600,
2054 .close_delay = info->port.close_delay
2056 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2060 static int moxa_set_serial_info(struct moxa_port *info,
2061 struct serial_struct __user *new_info)
2063 struct serial_struct new_serial;
2065 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2068 if (new_serial.irq != 0 || new_serial.port != 0 ||
2069 new_serial.custom_divisor != 0 ||
2070 new_serial.baud_base != 921600)
2073 if (!capable(CAP_SYS_ADMIN)) {
2074 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2075 (info->port.flags & ~ASYNC_USR_MASK)))
2078 info->port.close_delay = new_serial.close_delay * HZ / 100;
2080 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2081 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2083 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2085 info->type = new_serial.type;
2091 /*****************************************************************************
2092 * Static local functions: *
2093 *****************************************************************************/
2095 static void MoxaSetFifo(struct moxa_port *port, int enable)
2097 void __iomem *ofsAddr = port->tableAddr;
2100 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2101 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2103 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2104 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);