1 // SPDX-License-Identifier: GPL-2.0+
2 /*****************************************************************************/
4 * moxa.c -- MOXA Intellio family multiport serial driver.
6 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
7 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
14 * MOXA Intellio Series Driver
20 #include <linux/module.h>
21 #include <linux/types.h>
23 #include <linux/ioport.h>
24 #include <linux/errno.h>
25 #include <linux/firmware.h>
26 #include <linux/signal.h>
27 #include <linux/sched.h>
28 #include <linux/timer.h>
29 #include <linux/interrupt.h>
30 #include <linux/tty.h>
31 #include <linux/tty_flip.h>
32 #include <linux/major.h>
33 #include <linux/string.h>
34 #include <linux/fcntl.h>
35 #include <linux/ptrace.h>
36 #include <linux/serial.h>
37 #include <linux/tty_driver.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/init.h>
41 #include <linux/bitops.h>
42 #include <linux/slab.h>
43 #include <linux/ratelimit.h>
46 #include <linux/uaccess.h>
50 #define MOXA_VERSION "6.0k"
52 #define MOXA_FW_HDRLEN 32
56 #define MAX_BOARDS 4 /* Don't change this value */
57 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
58 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
60 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
61 (brd)->boardType == MOXA_BOARD_C320_PCI)
64 * Define the Moxa PCI vendor and device IDs.
66 #define MOXA_BUS_TYPE_ISA 0
67 #define MOXA_BUS_TYPE_PCI 1
70 MOXA_BOARD_C218_PCI = 1,
77 static char *moxa_brdname[] =
79 "C218 Turbo PCI series",
80 "C218 Turbo ISA series",
81 "C320 Turbo PCI series",
82 "C320 Turbo ISA series",
87 static const struct pci_device_id moxa_pcibrds[] = {
88 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
89 .driver_data = MOXA_BOARD_C218_PCI },
90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
91 .driver_data = MOXA_BOARD_C320_PCI },
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
93 .driver_data = MOXA_BOARD_CP204J },
96 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
97 #endif /* CONFIG_PCI */
101 static struct moxa_board_conf {
108 struct moxa_port *ports;
110 void __iomem *basemem;
111 void __iomem *intNdx;
112 void __iomem *intPend;
113 void __iomem *intTable;
114 } moxa_boards[MAX_BOARDS];
116 struct mxser_mstatus {
130 struct tty_port port;
131 struct moxa_board_conf *board;
132 void __iomem *tableAddr;
136 unsigned long statusflags;
138 u8 DCDState; /* Protected by the port lock */
145 int rxcnt[MAX_PORTS];
146 int txcnt[MAX_PORTS];
155 #define WAKEUP_CHARS 256
157 static int ttymajor = MOXAMAJOR;
158 static struct mon_str moxaLog;
159 static unsigned int moxaFuncTout = HZ / 2;
160 static unsigned int moxaLowWaterChk;
161 static DEFINE_MUTEX(moxa_openlock);
162 static DEFINE_SPINLOCK(moxa_lock);
164 static unsigned long baseaddr[MAX_BOARDS];
165 static unsigned int type[MAX_BOARDS];
166 static unsigned int numports[MAX_BOARDS];
167 static struct tty_port moxa_service_port;
169 MODULE_AUTHOR("William Chen");
170 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
171 MODULE_LICENSE("GPL");
174 module_param_array(type, uint, NULL, 0);
175 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
176 module_param_hw_array(baseaddr, ulong, ioport, NULL, 0);
177 MODULE_PARM_DESC(baseaddr, "base address");
178 module_param_array(numports, uint, NULL, 0);
179 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
181 module_param(ttymajor, int, 0);
186 static int moxa_open(struct tty_struct *, struct file *);
187 static void moxa_close(struct tty_struct *, struct file *);
188 static int moxa_write(struct tty_struct *, const unsigned char *, int);
189 static int moxa_write_room(struct tty_struct *);
190 static void moxa_flush_buffer(struct tty_struct *);
191 static int moxa_chars_in_buffer(struct tty_struct *);
192 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
193 static void moxa_stop(struct tty_struct *);
194 static void moxa_start(struct tty_struct *);
195 static void moxa_hangup(struct tty_struct *);
196 static int moxa_tiocmget(struct tty_struct *tty);
197 static int moxa_tiocmset(struct tty_struct *tty,
198 unsigned int set, unsigned int clear);
199 static void moxa_poll(struct timer_list *);
200 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
201 static void moxa_shutdown(struct tty_port *);
202 static int moxa_carrier_raised(struct tty_port *);
203 static void moxa_dtr_rts(struct tty_port *, int);
205 * moxa board interface functions:
207 static void MoxaPortEnable(struct moxa_port *);
208 static void MoxaPortDisable(struct moxa_port *);
209 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
210 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
211 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
212 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
213 static int MoxaPortLineStatus(struct moxa_port *);
214 static void MoxaPortFlushData(struct moxa_port *, int);
215 static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
216 static int MoxaPortReadData(struct moxa_port *);
217 static int MoxaPortTxQueue(struct moxa_port *);
218 static int MoxaPortRxQueue(struct moxa_port *);
219 static int MoxaPortTxFree(struct moxa_port *);
220 static void MoxaPortTxDisable(struct moxa_port *);
221 static void MoxaPortTxEnable(struct moxa_port *);
222 static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *);
223 static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *);
224 static void MoxaSetFifo(struct moxa_port *port, int enable);
230 static DEFINE_SPINLOCK(moxafunc_lock);
232 static void moxa_wait_finish(void __iomem *ofsAddr)
234 unsigned long end = jiffies + moxaFuncTout;
236 while (readw(ofsAddr + FuncCode) != 0)
237 if (time_after(jiffies, end))
239 if (readw(ofsAddr + FuncCode) != 0)
240 printk_ratelimited(KERN_WARNING "moxa function expired\n");
243 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
246 spin_lock_irqsave(&moxafunc_lock, flags);
247 writew(arg, ofsAddr + FuncArg);
248 writew(cmd, ofsAddr + FuncCode);
249 moxa_wait_finish(ofsAddr);
250 spin_unlock_irqrestore(&moxafunc_lock, flags);
253 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
257 spin_lock_irqsave(&moxafunc_lock, flags);
258 writew(arg, ofsAddr + FuncArg);
259 writew(cmd, ofsAddr + FuncCode);
260 moxa_wait_finish(ofsAddr);
261 ret = readw(ofsAddr + FuncArg);
262 spin_unlock_irqrestore(&moxafunc_lock, flags);
266 static void moxa_low_water_check(void __iomem *ofsAddr)
268 u16 rptr, wptr, mask, len;
270 if (readb(ofsAddr + FlagStat) & Xoff_state) {
271 rptr = readw(ofsAddr + RXrptr);
272 wptr = readw(ofsAddr + RXwptr);
273 mask = readw(ofsAddr + RX_mask);
274 len = (wptr - rptr) & mask;
275 if (len <= Low_water)
276 moxafunc(ofsAddr, FC_SendXon, 0);
284 static int moxa_ioctl(struct tty_struct *tty,
285 unsigned int cmd, unsigned long arg)
287 struct moxa_port *ch = tty->driver_data;
288 void __user *argp = (void __user *)arg;
291 if (tty->index == MAX_PORTS) {
292 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
293 cmd != MOXA_GETMSTATUS)
299 case MOXA_GETDATACOUNT:
300 moxaLog.tick = jiffies;
301 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
304 case MOXA_FLUSH_QUEUE:
305 MoxaPortFlushData(ch, arg);
307 case MOXA_GET_IOQUEUE: {
308 struct moxaq_str __user *argm = argp;
309 struct moxaq_str tmp;
313 for (i = 0; i < MAX_BOARDS; i++) {
314 p = moxa_boards[i].ports;
315 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
316 memset(&tmp, 0, sizeof(tmp));
317 spin_lock_bh(&moxa_lock);
318 if (moxa_boards[i].ready) {
319 tmp.inq = MoxaPortRxQueue(p);
320 tmp.outq = MoxaPortTxQueue(p);
322 spin_unlock_bh(&moxa_lock);
323 if (copy_to_user(argm, &tmp, sizeof(tmp)))
328 } case MOXA_GET_OQUEUE:
329 status = MoxaPortTxQueue(ch);
330 ret = put_user(status, (unsigned long __user *)argp);
332 case MOXA_GET_IQUEUE:
333 status = MoxaPortRxQueue(ch);
334 ret = put_user(status, (unsigned long __user *)argp);
336 case MOXA_GETMSTATUS: {
337 struct mxser_mstatus __user *argm = argp;
338 struct mxser_mstatus tmp;
342 for (i = 0; i < MAX_BOARDS; i++) {
343 p = moxa_boards[i].ports;
344 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
345 struct tty_struct *ttyp;
346 memset(&tmp, 0, sizeof(tmp));
347 spin_lock_bh(&moxa_lock);
348 if (!moxa_boards[i].ready) {
349 spin_unlock_bh(&moxa_lock);
353 status = MoxaPortLineStatus(p);
354 spin_unlock_bh(&moxa_lock);
363 ttyp = tty_port_tty_get(&p->port);
365 tmp.cflag = p->cflag;
367 tmp.cflag = ttyp->termios.c_cflag;
370 if (copy_to_user(argm, &tmp, sizeof(tmp)))
382 static int moxa_break_ctl(struct tty_struct *tty, int state)
384 struct moxa_port *port = tty->driver_data;
386 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
391 static const struct tty_operations moxa_ops = {
395 .write_room = moxa_write_room,
396 .flush_buffer = moxa_flush_buffer,
397 .chars_in_buffer = moxa_chars_in_buffer,
399 .set_termios = moxa_set_termios,
402 .hangup = moxa_hangup,
403 .break_ctl = moxa_break_ctl,
404 .tiocmget = moxa_tiocmget,
405 .tiocmset = moxa_tiocmset,
406 .set_serial = moxa_set_serial_info,
407 .get_serial = moxa_get_serial_info,
410 static const struct tty_port_operations moxa_port_ops = {
411 .carrier_raised = moxa_carrier_raised,
412 .dtr_rts = moxa_dtr_rts,
413 .shutdown = moxa_shutdown,
416 static struct tty_driver *moxaDriver;
417 static DEFINE_TIMER(moxaTimer, moxa_poll);
423 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
425 switch (brd->boardType) {
426 case MOXA_BOARD_C218_ISA:
427 case MOXA_BOARD_C218_PCI:
431 case MOXA_BOARD_CP204J:
445 static int moxa_check_fw(const void *ptr)
447 const __le16 *lptr = ptr;
449 if (*lptr != cpu_to_le16(0x7980))
455 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
458 void __iomem *baseAddr = brd->basemem;
461 writeb(HW_reset, baseAddr + Control_reg); /* reset */
463 memset_io(baseAddr, 0, 4096);
464 memcpy_toio(baseAddr, buf, len); /* download BIOS */
465 writeb(0, baseAddr + Control_reg); /* restart */
469 switch (brd->boardType) {
470 case MOXA_BOARD_C218_ISA:
471 case MOXA_BOARD_C218_PCI:
472 tmp = readw(baseAddr + C218_key);
473 if (tmp != C218_KeyCode)
476 case MOXA_BOARD_CP204J:
477 tmp = readw(baseAddr + C218_key);
478 if (tmp != CP204J_KeyCode)
482 tmp = readw(baseAddr + C320_key);
483 if (tmp != C320_KeyCode)
485 tmp = readw(baseAddr + C320_status);
486 if (tmp != STS_init) {
487 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
488 "module not found\n");
496 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
500 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
503 void __iomem *baseAddr = brd->basemem;
506 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
510 writew(len - 7168 - 2, baseAddr + C320bapi_len);
511 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
512 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
513 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
514 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
519 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
522 void __iomem *baseAddr = brd->basemem;
523 const __le16 *uptr = ptr;
524 size_t wlen, len2, j;
525 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
526 unsigned int i, retry;
529 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
532 switch (brd->boardType) {
533 case MOXA_BOARD_CP204J:
534 case MOXA_BOARD_C218_ISA:
535 case MOXA_BOARD_C218_PCI:
537 loadbuf = C218_LoadBuf;
538 loadlen = C218DLoad_len;
539 checksum = C218check_sum;
540 checksum_ok = C218chksum_ok;
544 keycode = C320_KeyCode;
545 loadbuf = C320_LoadBuf;
546 loadlen = C320DLoad_len;
547 checksum = C320check_sum;
548 checksum_ok = C320chksum_ok;
554 for (i = 0; i < wlen; i++)
555 usum += le16_to_cpu(uptr[i]);
561 len2 = (wlen > 2048) ? 2048 : wlen;
563 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
566 writew(len2, baseAddr + loadlen);
567 writew(0, baseAddr + key);
568 for (i = 0; i < 100; i++) {
569 if (readw(baseAddr + key) == keycode)
573 if (readw(baseAddr + key) != keycode)
576 writew(0, baseAddr + loadlen);
577 writew(usum, baseAddr + checksum);
578 writew(0, baseAddr + key);
579 for (i = 0; i < 100; i++) {
580 if (readw(baseAddr + key) == keycode)
585 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
586 if (readb(baseAddr + checksum_ok) != 1)
589 writew(0, baseAddr + key);
590 for (i = 0; i < 600; i++) {
591 if (readw(baseAddr + Magic_no) == Magic_code)
595 if (readw(baseAddr + Magic_no) != Magic_code)
598 if (MOXA_IS_320(brd)) {
599 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
600 writew(0x3800, baseAddr + TMS320_PORT1);
601 writew(0x3900, baseAddr + TMS320_PORT2);
602 writew(28499, baseAddr + TMS320_CLOCK);
604 writew(0x3200, baseAddr + TMS320_PORT1);
605 writew(0x3400, baseAddr + TMS320_PORT2);
606 writew(19999, baseAddr + TMS320_CLOCK);
609 writew(1, baseAddr + Disable_IRQ);
610 writew(0, baseAddr + Magic_no);
611 for (i = 0; i < 500; i++) {
612 if (readw(baseAddr + Magic_no) == Magic_code)
616 if (readw(baseAddr + Magic_no) != Magic_code)
619 if (MOXA_IS_320(brd)) {
620 j = readw(baseAddr + Module_cnt);
623 brd->numPorts = j * 8;
624 writew(j, baseAddr + Module_no);
625 writew(0, baseAddr + Magic_no);
626 for (i = 0; i < 600; i++) {
627 if (readw(baseAddr + Magic_no) == Magic_code)
631 if (readw(baseAddr + Magic_no) != Magic_code)
634 brd->intNdx = baseAddr + IRQindex;
635 brd->intPend = baseAddr + IRQpending;
636 brd->intTable = baseAddr + IRQtable;
641 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
644 void __iomem *ofsAddr, *baseAddr = brd->basemem;
645 struct moxa_port *port;
649 printk(KERN_ERR "MOXA: bios length is not even\n");
653 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
657 switch (brd->boardType) {
658 case MOXA_BOARD_C218_ISA:
659 case MOXA_BOARD_C218_PCI:
660 case MOXA_BOARD_CP204J:
662 for (i = 0; i < brd->numPorts; i++, port++) {
665 port->tableAddr = baseAddr + Extern_table +
667 ofsAddr = port->tableAddr;
668 writew(C218rx_mask, ofsAddr + RX_mask);
669 writew(C218tx_mask, ofsAddr + TX_mask);
670 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
671 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
673 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
674 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
680 for (i = 0; i < brd->numPorts; i++, port++) {
683 port->tableAddr = baseAddr + Extern_table +
685 ofsAddr = port->tableAddr;
686 switch (brd->numPorts) {
688 writew(C320p8rx_mask, ofsAddr + RX_mask);
689 writew(C320p8tx_mask, ofsAddr + TX_mask);
690 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
691 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
692 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
693 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
697 writew(C320p16rx_mask, ofsAddr + RX_mask);
698 writew(C320p16tx_mask, ofsAddr + TX_mask);
699 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
700 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
701 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
702 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
706 writew(C320p24rx_mask, ofsAddr + RX_mask);
707 writew(C320p24tx_mask, ofsAddr + TX_mask);
708 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
709 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
710 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
711 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
714 writew(C320p32rx_mask, ofsAddr + RX_mask);
715 writew(C320p32tx_mask, ofsAddr + TX_mask);
716 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
717 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
718 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
719 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
720 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
729 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
731 const void *ptr = fw->data;
735 unsigned int a, lenp, lencnt;
738 __le32 magic; /* 0x34303430 */
740 u8 type; /* UNIX = 3 */
741 u8 model; /* C218T=1, C320T=2, CP204=3 */
746 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
748 if (fw->size < MOXA_FW_HDRLEN) {
749 strcpy(rsn, "too short (even header won't fit)");
752 if (hdr->magic != cpu_to_le32(0x30343034)) {
753 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
756 if (hdr->type != 3) {
757 sprintf(rsn, "not for linux, type is %u", hdr->type);
760 if (moxa_check_fw_model(brd, hdr->model)) {
761 sprintf(rsn, "not for this card, model is %u", hdr->model);
765 len = MOXA_FW_HDRLEN;
766 lencnt = hdr->model == 2 ? 5 : 3;
767 for (a = 0; a < ARRAY_SIZE(lens); a++) {
768 lens[a] = le16_to_cpu(hdr->len[a]);
769 if (lens[a] && len + lens[a] <= fw->size &&
770 moxa_check_fw(&fw->data[len]))
771 printk(KERN_WARNING "MOXA firmware: unexpected input "
772 "at offset %u, but going on\n", (u32)len);
773 if (!lens[a] && a < lencnt) {
774 sprintf(rsn, "too few entries in fw file");
780 if (len != fw->size) {
781 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
786 ptr += MOXA_FW_HDRLEN;
789 strcpy(rsn, "read above");
791 ret = moxa_load_bios(brd, ptr, lens[lenp]);
795 /* we skip the tty section (lens[1]), since we don't need it */
796 ptr += lens[lenp] + lens[lenp + 1];
797 lenp += 2; /* comm */
799 if (hdr->model == 2) {
800 ret = moxa_load_320b(brd, ptr, lens[lenp]);
803 /* skip another tty */
804 ptr += lens[lenp] + lens[lenp + 1];
808 ret = moxa_load_code(brd, ptr, lens[lenp]);
814 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
818 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
820 const struct firmware *fw;
823 unsigned int i, first_idx;
826 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
828 if (brd->ports == NULL) {
829 printk(KERN_ERR "cannot allocate memory for ports\n");
834 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
835 tty_port_init(&p->port);
836 p->port.ops = &moxa_port_ops;
837 p->type = PORT_16550A;
838 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
841 switch (brd->boardType) {
842 case MOXA_BOARD_C218_ISA:
843 case MOXA_BOARD_C218_PCI:
844 file = "/*(DEBLOBBED)*/";
846 case MOXA_BOARD_CP204J:
847 file = "/*(DEBLOBBED)*/";
850 file = "/*(DEBLOBBED)*/";
854 ret = reject_firmware(&fw, file, dev);
856 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
857 "you've placed '%s' file into your firmware "
858 "loader directory (e.g. /lib/firmware)\n",
863 ret = moxa_load_fw(brd, fw);
865 release_firmware(fw);
870 spin_lock_bh(&moxa_lock);
872 if (!timer_pending(&moxaTimer))
873 mod_timer(&moxaTimer, jiffies + HZ / 50);
874 spin_unlock_bh(&moxa_lock);
876 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
877 for (i = 0; i < brd->numPorts; i++)
878 tty_port_register_device(&brd->ports[i].port, moxaDriver,
883 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
884 tty_port_destroy(&brd->ports[i].port);
890 static void moxa_board_deinit(struct moxa_board_conf *brd)
892 unsigned int a, opened, first_idx;
894 mutex_lock(&moxa_openlock);
895 spin_lock_bh(&moxa_lock);
897 spin_unlock_bh(&moxa_lock);
899 /* pci hot-un-plug support */
900 for (a = 0; a < brd->numPorts; a++)
901 if (tty_port_initialized(&brd->ports[a].port))
902 tty_port_tty_hangup(&brd->ports[a].port, false);
904 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
905 tty_port_destroy(&brd->ports[a].port);
909 for (a = 0; a < brd->numPorts; a++)
910 if (tty_port_initialized(&brd->ports[a].port))
912 mutex_unlock(&moxa_openlock);
916 mutex_lock(&moxa_openlock);
919 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
920 for (a = 0; a < brd->numPorts; a++)
921 tty_unregister_device(moxaDriver, first_idx + a);
923 iounmap(brd->basemem);
929 static int moxa_pci_probe(struct pci_dev *pdev,
930 const struct pci_device_id *ent)
932 struct moxa_board_conf *board;
934 int board_type = ent->driver_data;
937 retval = pci_enable_device(pdev);
939 dev_err(&pdev->dev, "can't enable pci device\n");
943 for (i = 0; i < MAX_BOARDS; i++)
944 if (moxa_boards[i].basemem == NULL)
948 if (i >= MAX_BOARDS) {
949 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
950 "found. Board is ignored.\n", MAX_BOARDS);
954 board = &moxa_boards[i];
956 retval = pci_request_region(pdev, 2, "moxa-base");
958 dev_err(&pdev->dev, "can't request pci region 2\n");
962 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
963 if (board->basemem == NULL) {
964 dev_err(&pdev->dev, "can't remap io space 2\n");
969 board->boardType = board_type;
970 switch (board_type) {
971 case MOXA_BOARD_C218_ISA:
972 case MOXA_BOARD_C218_PCI:
976 case MOXA_BOARD_CP204J:
983 board->busType = MOXA_BUS_TYPE_PCI;
985 retval = moxa_init_board(board, &pdev->dev);
989 pci_set_drvdata(pdev, board);
991 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
992 moxa_brdname[board_type - 1], board->numPorts);
996 iounmap(board->basemem);
997 board->basemem = NULL;
999 pci_release_region(pdev, 2);
1004 static void moxa_pci_remove(struct pci_dev *pdev)
1006 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1008 moxa_board_deinit(brd);
1010 pci_release_region(pdev, 2);
1013 static struct pci_driver moxa_pci_driver = {
1015 .id_table = moxa_pcibrds,
1016 .probe = moxa_pci_probe,
1017 .remove = moxa_pci_remove
1019 #endif /* CONFIG_PCI */
1021 static int __init moxa_init(void)
1023 unsigned int isabrds = 0;
1025 struct moxa_board_conf *brd = moxa_boards;
1028 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1031 tty_port_init(&moxa_service_port);
1033 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1034 TTY_DRIVER_REAL_RAW |
1035 TTY_DRIVER_DYNAMIC_DEV);
1036 if (IS_ERR(moxaDriver))
1037 return PTR_ERR(moxaDriver);
1039 moxaDriver->name = "ttyMX";
1040 moxaDriver->major = ttymajor;
1041 moxaDriver->minor_start = 0;
1042 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1043 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1044 moxaDriver->init_termios = tty_std_termios;
1045 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1046 moxaDriver->init_termios.c_ispeed = 9600;
1047 moxaDriver->init_termios.c_ospeed = 9600;
1048 tty_set_operations(moxaDriver, &moxa_ops);
1049 /* Having one more port only for ioctls is ugly */
1050 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1052 if (tty_register_driver(moxaDriver)) {
1053 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1054 put_tty_driver(moxaDriver);
1058 /* Find the boards defined from module args. */
1060 for (i = 0; i < MAX_BOARDS; i++) {
1063 if (type[i] == MOXA_BOARD_C218_ISA ||
1064 type[i] == MOXA_BOARD_C320_ISA) {
1065 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1066 isabrds + 1, moxa_brdname[type[i] - 1],
1068 brd->boardType = type[i];
1069 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1071 brd->busType = MOXA_BUS_TYPE_ISA;
1072 brd->basemem = ioremap(baseaddr[i], 0x4000);
1073 if (!brd->basemem) {
1074 printk(KERN_ERR "MOXA: can't remap %lx\n",
1078 if (moxa_init_board(brd, NULL)) {
1079 iounmap(brd->basemem);
1080 brd->basemem = NULL;
1084 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
1085 "ready (%u ports, firmware loaded)\n",
1086 baseaddr[i], brd->numPorts);
1094 retval = pci_register_driver(&moxa_pci_driver);
1096 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1105 static void __exit moxa_exit(void)
1110 pci_unregister_driver(&moxa_pci_driver);
1113 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1114 if (moxa_boards[i].ready)
1115 moxa_board_deinit(&moxa_boards[i]);
1117 del_timer_sync(&moxaTimer);
1119 tty_unregister_driver(moxaDriver);
1120 put_tty_driver(moxaDriver);
1123 module_init(moxa_init);
1124 module_exit(moxa_exit);
1126 static void moxa_shutdown(struct tty_port *port)
1128 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1129 MoxaPortDisable(ch);
1130 MoxaPortFlushData(ch, 2);
1133 static int moxa_carrier_raised(struct tty_port *port)
1135 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1138 spin_lock_irq(&port->lock);
1140 spin_unlock_irq(&port->lock);
1144 static void moxa_dtr_rts(struct tty_port *port, int onoff)
1146 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1147 MoxaPortLineCtrl(ch, onoff, onoff);
1151 static int moxa_open(struct tty_struct *tty, struct file *filp)
1153 struct moxa_board_conf *brd;
1154 struct moxa_port *ch;
1158 if (port == MAX_PORTS) {
1159 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1161 if (mutex_lock_interruptible(&moxa_openlock))
1162 return -ERESTARTSYS;
1163 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1165 mutex_unlock(&moxa_openlock);
1169 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1170 mutex_unlock(&moxa_openlock);
1174 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1176 tty->driver_data = ch;
1177 tty_port_tty_set(&ch->port, tty);
1178 mutex_lock(&ch->port.mutex);
1179 if (!tty_port_initialized(&ch->port)) {
1180 ch->statusflags = 0;
1181 moxa_set_tty_param(tty, &tty->termios);
1182 MoxaPortLineCtrl(ch, 1, 1);
1184 MoxaSetFifo(ch, ch->type == PORT_16550A);
1185 tty_port_set_initialized(&ch->port, 1);
1187 mutex_unlock(&ch->port.mutex);
1188 mutex_unlock(&moxa_openlock);
1190 return tty_port_block_til_ready(&ch->port, tty, filp);
1193 static void moxa_close(struct tty_struct *tty, struct file *filp)
1195 struct moxa_port *ch = tty->driver_data;
1196 ch->cflag = tty->termios.c_cflag;
1197 tty_port_close(&ch->port, tty, filp);
1200 static int moxa_write(struct tty_struct *tty,
1201 const unsigned char *buf, int count)
1203 struct moxa_port *ch = tty->driver_data;
1204 unsigned long flags;
1210 spin_lock_irqsave(&moxa_lock, flags);
1211 len = MoxaPortWriteData(tty, buf, count);
1212 spin_unlock_irqrestore(&moxa_lock, flags);
1214 set_bit(LOWWAIT, &ch->statusflags);
1218 static int moxa_write_room(struct tty_struct *tty)
1220 struct moxa_port *ch;
1224 ch = tty->driver_data;
1227 return MoxaPortTxFree(ch);
1230 static void moxa_flush_buffer(struct tty_struct *tty)
1232 struct moxa_port *ch = tty->driver_data;
1236 MoxaPortFlushData(ch, 1);
1240 static int moxa_chars_in_buffer(struct tty_struct *tty)
1242 struct moxa_port *ch = tty->driver_data;
1245 chars = MoxaPortTxQueue(ch);
1248 * Make it possible to wakeup anything waiting for output
1249 * in tty_ioctl.c, etc.
1251 set_bit(EMPTYWAIT, &ch->statusflags);
1255 static int moxa_tiocmget(struct tty_struct *tty)
1257 struct moxa_port *ch = tty->driver_data;
1258 int flag = 0, dtr, rts;
1260 MoxaPortGetLineOut(ch, &dtr, &rts);
1265 dtr = MoxaPortLineStatus(ch);
1275 static int moxa_tiocmset(struct tty_struct *tty,
1276 unsigned int set, unsigned int clear)
1278 struct moxa_port *ch;
1281 mutex_lock(&moxa_openlock);
1282 ch = tty->driver_data;
1284 mutex_unlock(&moxa_openlock);
1288 MoxaPortGetLineOut(ch, &dtr, &rts);
1289 if (set & TIOCM_RTS)
1291 if (set & TIOCM_DTR)
1293 if (clear & TIOCM_RTS)
1295 if (clear & TIOCM_DTR)
1297 MoxaPortLineCtrl(ch, dtr, rts);
1298 mutex_unlock(&moxa_openlock);
1302 static void moxa_set_termios(struct tty_struct *tty,
1303 struct ktermios *old_termios)
1305 struct moxa_port *ch = tty->driver_data;
1309 moxa_set_tty_param(tty, old_termios);
1310 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1311 wake_up_interruptible(&ch->port.open_wait);
1314 static void moxa_stop(struct tty_struct *tty)
1316 struct moxa_port *ch = tty->driver_data;
1320 MoxaPortTxDisable(ch);
1321 set_bit(TXSTOPPED, &ch->statusflags);
1325 static void moxa_start(struct tty_struct *tty)
1327 struct moxa_port *ch = tty->driver_data;
1332 if (!test_bit(TXSTOPPED, &ch->statusflags))
1335 MoxaPortTxEnable(ch);
1336 clear_bit(TXSTOPPED, &ch->statusflags);
1339 static void moxa_hangup(struct tty_struct *tty)
1341 struct moxa_port *ch = tty->driver_data;
1342 tty_port_hangup(&ch->port);
1345 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1347 unsigned long flags;
1350 spin_lock_irqsave(&p->port.lock, flags);
1351 if (dcd != p->DCDState) {
1353 spin_unlock_irqrestore(&p->port.lock, flags);
1355 tty_port_tty_hangup(&p->port, true);
1358 spin_unlock_irqrestore(&p->port.lock, flags);
1361 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1364 struct tty_struct *tty = tty_port_tty_get(&p->port);
1365 void __iomem *ofsAddr;
1366 unsigned int inited = tty_port_initialized(&p->port);
1370 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1371 MoxaPortTxQueue(p) == 0) {
1372 clear_bit(EMPTYWAIT, &p->statusflags);
1375 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1376 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1377 clear_bit(LOWWAIT, &p->statusflags);
1381 if (inited && !tty_throttled(tty) &&
1382 MoxaPortRxQueue(p) > 0) { /* RX */
1383 MoxaPortReadData(p);
1384 tty_schedule_flip(&p->port);
1387 clear_bit(EMPTYWAIT, &p->statusflags);
1388 MoxaPortFlushData(p, 0); /* flush RX */
1391 if (!handle) /* nothing else to do */
1394 intr = readw(ip); /* port irq status */
1398 writew(0, ip); /* ACK port */
1399 ofsAddr = p->tableAddr;
1400 if (intr & IntrTx) /* disable tx intr */
1401 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1402 ofsAddr + HostStat);
1407 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1408 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
1409 tty_schedule_flip(&p->port);
1412 if (intr & IntrLine)
1413 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1420 static void moxa_poll(struct timer_list *unused)
1422 struct moxa_board_conf *brd;
1424 unsigned int card, port, served = 0;
1426 spin_lock(&moxa_lock);
1427 for (card = 0; card < MAX_BOARDS; card++) {
1428 brd = &moxa_boards[card];
1435 if (readb(brd->intPend) == 0xff)
1436 ip = brd->intTable + readb(brd->intNdx);
1438 for (port = 0; port < brd->numPorts; port++)
1439 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1442 writeb(0, brd->intPend); /* ACK */
1444 if (moxaLowWaterChk) {
1445 struct moxa_port *p = brd->ports;
1446 for (port = 0; port < brd->numPorts; port++, p++)
1447 if (p->lowChkFlag) {
1449 moxa_low_water_check(p->tableAddr);
1453 moxaLowWaterChk = 0;
1456 mod_timer(&moxaTimer, jiffies + HZ / 50);
1457 spin_unlock(&moxa_lock);
1460 /******************************************************************************/
1462 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1464 register struct ktermios *ts = &tty->termios;
1465 struct moxa_port *ch = tty->driver_data;
1466 int rts, cts, txflow, rxflow, xany, baud;
1468 rts = cts = txflow = rxflow = xany = 0;
1469 if (ts->c_cflag & CRTSCTS)
1471 if (ts->c_iflag & IXON)
1473 if (ts->c_iflag & IXOFF)
1475 if (ts->c_iflag & IXANY)
1478 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1479 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1481 baud = tty_termios_baud_rate(old_termios);
1482 /* Not put the baud rate into the termios data */
1483 tty_encode_baud_rate(tty, baud, baud);
1486 /*****************************************************************************
1487 * Driver level functions: *
1488 *****************************************************************************/
1490 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1492 void __iomem *ofsAddr;
1493 if (mode < 0 || mode > 2)
1495 ofsAddr = port->tableAddr;
1496 moxafunc(ofsAddr, FC_FlushQueue, mode);
1498 port->lowChkFlag = 0;
1499 moxa_low_water_check(ofsAddr);
1504 * Moxa Port Number Description:
1506 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1507 * the port number using in MOXA driver functions will be 0 to 31 for
1508 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1509 * to 127 for fourth. For example, if you setup three MOXA boards,
1510 * first board is C218, second board is C320-16 and third board is
1511 * C320-32. The port number of first board (C218 - 8 ports) is from
1512 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1513 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1514 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1515 * 127 will be invalid.
1518 * Moxa Functions Description:
1520 * Function 1: Driver initialization routine, this routine must be
1521 * called when initialized driver.
1523 * void MoxaDriverInit();
1526 * Function 2: Moxa driver private IOCTL command processing.
1528 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1530 * unsigned int cmd : IOCTL command
1531 * unsigned long arg : IOCTL argument
1532 * int port : port number (0 - 127)
1539 * Function 6: Enable this port to start Tx/Rx data.
1541 * void MoxaPortEnable(int port);
1542 * int port : port number (0 - 127)
1545 * Function 7: Disable this port
1547 * void MoxaPortDisable(int port);
1548 * int port : port number (0 - 127)
1551 * Function 10: Setting baud rate of this port.
1553 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1554 * int port : port number (0 - 127)
1555 * long baud : baud rate (50 - 115200)
1557 * return: 0 : this port is invalid or baud < 50
1558 * 50 - 115200 : the real baud rate set to the port, if
1559 * the argument baud is large than maximun
1560 * available baud rate, the real setting
1561 * baud rate will be the maximun baud rate.
1564 * Function 12: Configure the port.
1566 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1567 * int port : port number (0 - 127)
1568 * struct ktermios * termio : termio structure pointer
1569 * speed_t baud : baud rate
1571 * return: -1 : this port is invalid or termio == NULL
1575 * Function 13: Get the DTR/RTS state of this port.
1577 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1578 * int port : port number (0 - 127)
1579 * int * dtrState : pointer to INT to receive the current DTR
1580 * state. (if NULL, this function will not
1581 * write to this address)
1582 * int * rtsState : pointer to INT to receive the current RTS
1583 * state. (if NULL, this function will not
1584 * write to this address)
1586 * return: -1 : this port is invalid
1590 * Function 14: Setting the DTR/RTS output state of this port.
1592 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1593 * int port : port number (0 - 127)
1594 * int dtrState : DTR output state (0: off, 1: on)
1595 * int rtsState : RTS output state (0: off, 1: on)
1598 * Function 15: Setting the flow control of this port.
1600 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1601 * int txFlow,int xany);
1602 * int port : port number (0 - 127)
1603 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1604 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1605 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1606 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1607 * int xany : S/W XANY flow control (0: no, 1: yes)
1610 * Function 16: Get ths line status of this port
1612 * int MoxaPortLineStatus(int port);
1613 * int port : port number (0 - 127)
1615 * return: Bit 0 - CTS state (0: off, 1: on)
1616 * Bit 1 - DSR state (0: off, 1: on)
1617 * Bit 2 - DCD state (0: off, 1: on)
1620 * Function 19: Flush the Rx/Tx buffer data of this port.
1622 * void MoxaPortFlushData(int port, int mode);
1623 * int port : port number (0 - 127)
1625 * 0 : flush the Rx buffer
1626 * 1 : flush the Tx buffer
1627 * 2 : flush the Rx and Tx buffer
1630 * Function 20: Write data.
1632 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1633 * int port : port number (0 - 127)
1634 * unsigned char * buffer : pointer to write data buffer.
1635 * int length : write data length
1637 * return: 0 - length : real write data length
1640 * Function 21: Read data.
1642 * int MoxaPortReadData(int port, struct tty_struct *tty);
1643 * int port : port number (0 - 127)
1644 * struct tty_struct *tty : tty for data
1646 * return: 0 - length : real read data length
1649 * Function 24: Get the Tx buffer current queued data bytes
1651 * int MoxaPortTxQueue(int port);
1652 * int port : port number (0 - 127)
1654 * return: .. : Tx buffer current queued data bytes
1657 * Function 25: Get the Tx buffer current free space
1659 * int MoxaPortTxFree(int port);
1660 * int port : port number (0 - 127)
1662 * return: .. : Tx buffer current free space
1665 * Function 26: Get the Rx buffer current queued data bytes
1667 * int MoxaPortRxQueue(int port);
1668 * int port : port number (0 - 127)
1670 * return: .. : Rx buffer current queued data bytes
1673 * Function 28: Disable port data transmission.
1675 * void MoxaPortTxDisable(int port);
1676 * int port : port number (0 - 127)
1679 * Function 29: Enable port data transmission.
1681 * void MoxaPortTxEnable(int port);
1682 * int port : port number (0 - 127)
1685 * Function 31: Get the received BREAK signal count and reset it.
1687 * int MoxaPortResetBrkCnt(int port);
1688 * int port : port number (0 - 127)
1690 * return: 0 - .. : BREAK signal count
1695 static void MoxaPortEnable(struct moxa_port *port)
1697 void __iomem *ofsAddr;
1700 ofsAddr = port->tableAddr;
1701 writew(lowwater, ofsAddr + Low_water);
1702 if (MOXA_IS_320(port->board))
1703 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1705 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1706 ofsAddr + HostStat);
1708 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1709 moxafunc(ofsAddr, FC_FlushQueue, 2);
1711 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1712 MoxaPortLineStatus(port);
1715 static void MoxaPortDisable(struct moxa_port *port)
1717 void __iomem *ofsAddr = port->tableAddr;
1719 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1720 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1721 writew(0, ofsAddr + HostStat);
1722 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1725 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1727 void __iomem *ofsAddr = port->tableAddr;
1728 unsigned int clock, val;
1731 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1738 moxafunc(ofsAddr, FC_SetBaud, val);
1743 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1746 void __iomem *ofsAddr;
1749 ofsAddr = port->tableAddr;
1751 mode = termio->c_cflag & CSIZE;
1754 else if (mode == CS6)
1756 else if (mode == CS7)
1758 else if (mode == CS8)
1761 if (termio->c_cflag & CSTOPB) {
1769 if (termio->c_cflag & PARENB) {
1770 if (termio->c_cflag & PARODD) {
1771 if (termio->c_cflag & CMSPAR)
1776 if (termio->c_cflag & CMSPAR)
1777 mode |= MX_PARSPACE;
1784 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1786 if (MOXA_IS_320(port->board) && baud >= 921600)
1789 baud = MoxaPortSetBaud(port, baud);
1791 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1792 spin_lock_irq(&moxafunc_lock);
1793 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1794 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1795 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1796 moxa_wait_finish(ofsAddr);
1797 spin_unlock_irq(&moxafunc_lock);
1803 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1807 *dtrState = !!(port->lineCtrl & DTR_ON);
1809 *rtsState = !!(port->lineCtrl & RTS_ON);
1814 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1822 port->lineCtrl = mode;
1823 moxafunc(port->tableAddr, FC_LineControl, mode);
1826 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1827 int txflow, int rxflow, int txany)
1832 mode |= RTS_FlowCtl;
1834 mode |= CTS_FlowCtl;
1841 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1844 static int MoxaPortLineStatus(struct moxa_port *port)
1846 void __iomem *ofsAddr;
1849 ofsAddr = port->tableAddr;
1850 if (MOXA_IS_320(port->board))
1851 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1853 val = readw(ofsAddr + FlagStat) >> 4;
1857 moxa_new_dcdstate(port, val & 8);
1862 static int MoxaPortWriteData(struct tty_struct *tty,
1863 const unsigned char *buffer, int len)
1865 struct moxa_port *port = tty->driver_data;
1866 void __iomem *baseAddr, *ofsAddr, *ofs;
1867 unsigned int c, total;
1868 u16 head, tail, tx_mask, spage, epage;
1869 u16 pageno, pageofs, bufhead;
1871 ofsAddr = port->tableAddr;
1872 baseAddr = port->board->basemem;
1873 tx_mask = readw(ofsAddr + TX_mask);
1874 spage = readw(ofsAddr + Page_txb);
1875 epage = readw(ofsAddr + EndPage_txb);
1876 tail = readw(ofsAddr + TXwptr);
1877 head = readw(ofsAddr + TXrptr);
1878 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1881 moxaLog.txcnt[port->port.tty->index] += c;
1883 if (spage == epage) {
1884 bufhead = readw(ofsAddr + Ofs_txb);
1885 writew(spage, baseAddr + Control_reg);
1888 len = head - tail - 1;
1890 len = tx_mask + 1 - tail;
1891 len = (c > len) ? len : c;
1892 ofs = baseAddr + DynPage_addr + bufhead + tail;
1893 memcpy_toio(ofs, buffer, len);
1895 tail = (tail + len) & tx_mask;
1899 pageno = spage + (tail >> 13);
1900 pageofs = tail & Page_mask;
1902 len = Page_size - pageofs;
1905 writeb(pageno, baseAddr + Control_reg);
1906 ofs = baseAddr + DynPage_addr + pageofs;
1907 memcpy_toio(ofs, buffer, len);
1909 if (++pageno == epage)
1914 tail = (tail + total) & tx_mask;
1916 writew(tail, ofsAddr + TXwptr);
1917 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1921 static int MoxaPortReadData(struct moxa_port *port)
1923 struct tty_struct *tty = port->port.tty;
1925 void __iomem *baseAddr, *ofsAddr, *ofs;
1926 unsigned int count, len, total;
1927 u16 tail, rx_mask, spage, epage;
1928 u16 pageno, pageofs, bufhead, head;
1930 ofsAddr = port->tableAddr;
1931 baseAddr = port->board->basemem;
1932 head = readw(ofsAddr + RXrptr);
1933 tail = readw(ofsAddr + RXwptr);
1934 rx_mask = readw(ofsAddr + RX_mask);
1935 spage = readw(ofsAddr + Page_rxb);
1936 epage = readw(ofsAddr + EndPage_rxb);
1937 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1942 moxaLog.rxcnt[tty->index] += total;
1943 if (spage == epage) {
1944 bufhead = readw(ofsAddr + Ofs_rxb);
1945 writew(spage, baseAddr + Control_reg);
1947 ofs = baseAddr + DynPage_addr + bufhead + head;
1948 len = (tail >= head) ? (tail - head) :
1949 (rx_mask + 1 - head);
1950 len = tty_prepare_flip_string(&port->port, &dst,
1952 memcpy_fromio(dst, ofs, len);
1953 head = (head + len) & rx_mask;
1957 pageno = spage + (head >> 13);
1958 pageofs = head & Page_mask;
1960 writew(pageno, baseAddr + Control_reg);
1961 ofs = baseAddr + DynPage_addr + pageofs;
1962 len = tty_prepare_flip_string(&port->port, &dst,
1963 min(Page_size - pageofs, count));
1964 memcpy_fromio(dst, ofs, len);
1967 pageofs = (pageofs + len) & Page_mask;
1968 if (pageofs == 0 && ++pageno == epage)
1971 head = (head + total) & rx_mask;
1973 writew(head, ofsAddr + RXrptr);
1974 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1975 moxaLowWaterChk = 1;
1976 port->lowChkFlag = 1;
1982 static int MoxaPortTxQueue(struct moxa_port *port)
1984 void __iomem *ofsAddr = port->tableAddr;
1985 u16 rptr, wptr, mask;
1987 rptr = readw(ofsAddr + TXrptr);
1988 wptr = readw(ofsAddr + TXwptr);
1989 mask = readw(ofsAddr + TX_mask);
1990 return (wptr - rptr) & mask;
1993 static int MoxaPortTxFree(struct moxa_port *port)
1995 void __iomem *ofsAddr = port->tableAddr;
1996 u16 rptr, wptr, mask;
1998 rptr = readw(ofsAddr + TXrptr);
1999 wptr = readw(ofsAddr + TXwptr);
2000 mask = readw(ofsAddr + TX_mask);
2001 return mask - ((wptr - rptr) & mask);
2004 static int MoxaPortRxQueue(struct moxa_port *port)
2006 void __iomem *ofsAddr = port->tableAddr;
2007 u16 rptr, wptr, mask;
2009 rptr = readw(ofsAddr + RXrptr);
2010 wptr = readw(ofsAddr + RXwptr);
2011 mask = readw(ofsAddr + RX_mask);
2012 return (wptr - rptr) & mask;
2015 static void MoxaPortTxDisable(struct moxa_port *port)
2017 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2020 static void MoxaPortTxEnable(struct moxa_port *port)
2022 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2025 static int moxa_get_serial_info(struct tty_struct *tty,
2026 struct serial_struct *ss)
2028 struct moxa_port *info = tty->driver_data;
2030 if (tty->index == MAX_PORTS)
2034 mutex_lock(&info->port.mutex);
2035 ss->type = info->type,
2036 ss->line = info->port.tty->index,
2037 ss->flags = info->port.flags,
2038 ss->baud_base = 921600,
2039 ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
2040 mutex_unlock(&info->port.mutex);
2045 static int moxa_set_serial_info(struct tty_struct *tty,
2046 struct serial_struct *ss)
2048 struct moxa_port *info = tty->driver_data;
2049 unsigned int close_delay;
2051 if (tty->index == MAX_PORTS)
2056 close_delay = msecs_to_jiffies(ss->close_delay * 10);
2058 mutex_lock(&info->port.mutex);
2059 if (!capable(CAP_SYS_ADMIN)) {
2060 if (close_delay != info->port.close_delay ||
2061 ss->type != info->type ||
2062 ((ss->flags & ~ASYNC_USR_MASK) !=
2063 (info->port.flags & ~ASYNC_USR_MASK))) {
2064 mutex_unlock(&info->port.mutex);
2068 info->port.close_delay = close_delay;
2070 MoxaSetFifo(info, ss->type == PORT_16550A);
2072 info->type = ss->type;
2074 mutex_unlock(&info->port.mutex);
2080 /*****************************************************************************
2081 * Static local functions: *
2082 *****************************************************************************/
2084 static void MoxaSetFifo(struct moxa_port *port, int enable)
2086 void __iomem *ofsAddr = port->tableAddr;
2089 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2090 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2092 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2093 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);