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1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
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.
15 */
16
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.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/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46#include <linux/slab.h>
47#include <linux/ratelimit.h>
48
49#include <asm/io.h>
50#include <asm/uaccess.h>
51
52#include "moxa.h"
53
54#define MOXA_VERSION "6.0k"
55
56#define MOXA_FW_HDRLEN 32
57
58#define MOXAMAJOR 172
59
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)
63
64#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
66
67/*
68 * Define the Moxa PCI vendor and device IDs.
69 */
70#define MOXA_BUS_TYPE_ISA 0
71#define MOXA_BUS_TYPE_PCI 1
72
73enum {
74 MOXA_BOARD_C218_PCI = 1,
75 MOXA_BOARD_C218_ISA,
76 MOXA_BOARD_C320_PCI,
77 MOXA_BOARD_C320_ISA,
78 MOXA_BOARD_CP204J,
79};
80
81static char *moxa_brdname[] =
82{
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
87 "CP-204J series",
88};
89
90#ifdef CONFIG_PCI
91static 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 },
98 { 0 }
99};
100MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101#endif /* CONFIG_PCI */
102
103struct moxa_port;
104
105static struct moxa_board_conf {
106 int boardType;
107 int numPorts;
108 int busType;
109
110 unsigned int ready;
111
112 struct moxa_port *ports;
113
114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118} moxa_boards[MAX_BOARDS];
119
120struct mxser_mstatus {
121 tcflag_t cflag;
122 int cts;
123 int dsr;
124 int ri;
125 int dcd;
126};
127
128struct moxaq_str {
129 int inq;
130 int outq;
131};
132
133struct moxa_port {
134 struct tty_port port;
135 struct moxa_board_conf *board;
136 void __iomem *tableAddr;
137
138 int type;
139 int cflag;
140 unsigned long statusflags;
141
142 u8 DCDState; /* Protected by the port lock */
143 u8 lineCtrl;
144 u8 lowChkFlag;
145};
146
147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
153/* statusflags */
154#define TXSTOPPED 1
155#define LOWWAIT 2
156#define EMPTYWAIT 3
157
158
159#define WAKEUP_CHARS 256
160
161static int ttymajor = MOXAMAJOR;
162static struct mon_str moxaLog;
163static unsigned int moxaFuncTout = HZ / 2;
164static unsigned int moxaLowWaterChk;
165static DEFINE_MUTEX(moxa_openlock);
166static DEFINE_SPINLOCK(moxa_lock);
167
168static unsigned long baseaddr[MAX_BOARDS];
169static unsigned int type[MAX_BOARDS];
170static unsigned int numports[MAX_BOARDS];
171static struct tty_port moxa_service_port;
172
173MODULE_AUTHOR("William Chen");
174MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
175MODULE_LICENSE("GPL");
176MODULE_FIRMWARE("c218tunx.cod");
177MODULE_FIRMWARE("cp204unx.cod");
178MODULE_FIRMWARE("c320tunx.cod");
179
180module_param_array(type, uint, NULL, 0);
181MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
182module_param_array(baseaddr, ulong, NULL, 0);
183MODULE_PARM_DESC(baseaddr, "base address");
184module_param_array(numports, uint, NULL, 0);
185MODULE_PARM_DESC(numports, "numports (ignored for C218)");
186
187module_param(ttymajor, int, 0);
188
189/*
190 * static functions:
191 */
192static int moxa_open(struct tty_struct *, struct file *);
193static void moxa_close(struct tty_struct *, struct file *);
194static int moxa_write(struct tty_struct *, const unsigned char *, int);
195static int moxa_write_room(struct tty_struct *);
196static void moxa_flush_buffer(struct tty_struct *);
197static int moxa_chars_in_buffer(struct tty_struct *);
198static void moxa_set_termios(struct tty_struct *, struct ktermios *);
199static void moxa_stop(struct tty_struct *);
200static void moxa_start(struct tty_struct *);
201static void moxa_hangup(struct tty_struct *);
202static int moxa_tiocmget(struct tty_struct *tty);
203static int moxa_tiocmset(struct tty_struct *tty,
204 unsigned int set, unsigned int clear);
205static void moxa_poll(unsigned long);
206static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
207static void moxa_shutdown(struct tty_port *);
208static int moxa_carrier_raised(struct tty_port *);
209static void moxa_dtr_rts(struct tty_port *, int);
210/*
211 * moxa board interface functions:
212 */
213static void MoxaPortEnable(struct moxa_port *);
214static void MoxaPortDisable(struct moxa_port *);
215static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
216static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
217static void MoxaPortLineCtrl(struct moxa_port *, int, int);
218static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
219static int MoxaPortLineStatus(struct moxa_port *);
220static void MoxaPortFlushData(struct moxa_port *, int);
221static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
222static int MoxaPortReadData(struct moxa_port *);
223static int MoxaPortTxQueue(struct moxa_port *);
224static int MoxaPortRxQueue(struct moxa_port *);
225static int MoxaPortTxFree(struct moxa_port *);
226static void MoxaPortTxDisable(struct moxa_port *);
227static void MoxaPortTxEnable(struct moxa_port *);
228static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
229static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
230static void MoxaSetFifo(struct moxa_port *port, int enable);
231
232/*
233 * I/O functions
234 */
235
236static DEFINE_SPINLOCK(moxafunc_lock);
237
238static void moxa_wait_finish(void __iomem *ofsAddr)
239{
240 unsigned long end = jiffies + moxaFuncTout;
241
242 while (readw(ofsAddr + FuncCode) != 0)
243 if (time_after(jiffies, end))
244 return;
245 if (readw(ofsAddr + FuncCode) != 0)
246 printk_ratelimited(KERN_WARNING "moxa function expired\n");
247}
248
249static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
250{
251 unsigned long flags;
252 spin_lock_irqsave(&moxafunc_lock, flags);
253 writew(arg, ofsAddr + FuncArg);
254 writew(cmd, ofsAddr + FuncCode);
255 moxa_wait_finish(ofsAddr);
256 spin_unlock_irqrestore(&moxafunc_lock, flags);
257}
258
259static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
260{
261 unsigned long flags;
262 u16 ret;
263 spin_lock_irqsave(&moxafunc_lock, flags);
264 writew(arg, ofsAddr + FuncArg);
265 writew(cmd, ofsAddr + FuncCode);
266 moxa_wait_finish(ofsAddr);
267 ret = readw(ofsAddr + FuncArg);
268 spin_unlock_irqrestore(&moxafunc_lock, flags);
269 return ret;
270}
271
272static void moxa_low_water_check(void __iomem *ofsAddr)
273{
274 u16 rptr, wptr, mask, len;
275
276 if (readb(ofsAddr + FlagStat) & Xoff_state) {
277 rptr = readw(ofsAddr + RXrptr);
278 wptr = readw(ofsAddr + RXwptr);
279 mask = readw(ofsAddr + RX_mask);
280 len = (wptr - rptr) & mask;
281 if (len <= Low_water)
282 moxafunc(ofsAddr, FC_SendXon, 0);
283 }
284}
285
286/*
287 * TTY operations
288 */
289
290static int moxa_ioctl(struct tty_struct *tty,
291 unsigned int cmd, unsigned long arg)
292{
293 struct moxa_port *ch = tty->driver_data;
294 void __user *argp = (void __user *)arg;
295 int status, ret = 0;
296
297 if (tty->index == MAX_PORTS) {
298 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
299 cmd != MOXA_GETMSTATUS)
300 return -EINVAL;
301 } else if (!ch)
302 return -ENODEV;
303
304 switch (cmd) {
305 case MOXA_GETDATACOUNT:
306 moxaLog.tick = jiffies;
307 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
308 ret = -EFAULT;
309 break;
310 case MOXA_FLUSH_QUEUE:
311 MoxaPortFlushData(ch, arg);
312 break;
313 case MOXA_GET_IOQUEUE: {
314 struct moxaq_str __user *argm = argp;
315 struct moxaq_str tmp;
316 struct moxa_port *p;
317 unsigned int i, j;
318
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 spin_lock_bh(&moxa_lock);
324 if (moxa_boards[i].ready) {
325 tmp.inq = MoxaPortRxQueue(p);
326 tmp.outq = MoxaPortTxQueue(p);
327 }
328 spin_unlock_bh(&moxa_lock);
329 if (copy_to_user(argm, &tmp, sizeof(tmp)))
330 return -EFAULT;
331 }
332 }
333 break;
334 } case MOXA_GET_OQUEUE:
335 status = MoxaPortTxQueue(ch);
336 ret = put_user(status, (unsigned long __user *)argp);
337 break;
338 case MOXA_GET_IQUEUE:
339 status = MoxaPortRxQueue(ch);
340 ret = put_user(status, (unsigned long __user *)argp);
341 break;
342 case MOXA_GETMSTATUS: {
343 struct mxser_mstatus __user *argm = argp;
344 struct mxser_mstatus tmp;
345 struct moxa_port *p;
346 unsigned int i, j;
347
348 for (i = 0; i < MAX_BOARDS; i++) {
349 p = moxa_boards[i].ports;
350 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
351 struct tty_struct *ttyp;
352 memset(&tmp, 0, sizeof(tmp));
353 spin_lock_bh(&moxa_lock);
354 if (!moxa_boards[i].ready) {
355 spin_unlock_bh(&moxa_lock);
356 goto copy;
357 }
358
359 status = MoxaPortLineStatus(p);
360 spin_unlock_bh(&moxa_lock);
361
362 if (status & 1)
363 tmp.cts = 1;
364 if (status & 2)
365 tmp.dsr = 1;
366 if (status & 4)
367 tmp.dcd = 1;
368
369 ttyp = tty_port_tty_get(&p->port);
370 if (!ttyp)
371 tmp.cflag = p->cflag;
372 else
373 tmp.cflag = ttyp->termios.c_cflag;
374 tty_kref_put(ttyp);
375copy:
376 if (copy_to_user(argm, &tmp, sizeof(tmp)))
377 return -EFAULT;
378 }
379 }
380 break;
381 }
382 case TIOCGSERIAL:
383 mutex_lock(&ch->port.mutex);
384 ret = moxa_get_serial_info(ch, argp);
385 mutex_unlock(&ch->port.mutex);
386 break;
387 case TIOCSSERIAL:
388 mutex_lock(&ch->port.mutex);
389 ret = moxa_set_serial_info(ch, argp);
390 mutex_unlock(&ch->port.mutex);
391 break;
392 default:
393 ret = -ENOIOCTLCMD;
394 }
395 return ret;
396}
397
398static int moxa_break_ctl(struct tty_struct *tty, int state)
399{
400 struct moxa_port *port = tty->driver_data;
401
402 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
403 Magic_code);
404 return 0;
405}
406
407static const struct tty_operations moxa_ops = {
408 .open = moxa_open,
409 .close = moxa_close,
410 .write = moxa_write,
411 .write_room = moxa_write_room,
412 .flush_buffer = moxa_flush_buffer,
413 .chars_in_buffer = moxa_chars_in_buffer,
414 .ioctl = moxa_ioctl,
415 .set_termios = moxa_set_termios,
416 .stop = moxa_stop,
417 .start = moxa_start,
418 .hangup = moxa_hangup,
419 .break_ctl = moxa_break_ctl,
420 .tiocmget = moxa_tiocmget,
421 .tiocmset = moxa_tiocmset,
422};
423
424static const struct tty_port_operations moxa_port_ops = {
425 .carrier_raised = moxa_carrier_raised,
426 .dtr_rts = moxa_dtr_rts,
427 .shutdown = moxa_shutdown,
428};
429
430static struct tty_driver *moxaDriver;
431static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
432
433/*
434 * HW init
435 */
436
437static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
438{
439 switch (brd->boardType) {
440 case MOXA_BOARD_C218_ISA:
441 case MOXA_BOARD_C218_PCI:
442 if (model != 1)
443 goto err;
444 break;
445 case MOXA_BOARD_CP204J:
446 if (model != 3)
447 goto err;
448 break;
449 default:
450 if (model != 2)
451 goto err;
452 break;
453 }
454 return 0;
455err:
456 return -EINVAL;
457}
458
459static int moxa_check_fw(const void *ptr)
460{
461 const __le16 *lptr = ptr;
462
463 if (*lptr != cpu_to_le16(0x7980))
464 return -EINVAL;
465
466 return 0;
467}
468
469static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
470 size_t len)
471{
472 void __iomem *baseAddr = brd->basemem;
473 u16 tmp;
474
475 writeb(HW_reset, baseAddr + Control_reg); /* reset */
476 msleep(10);
477 memset_io(baseAddr, 0, 4096);
478 memcpy_toio(baseAddr, buf, len); /* download BIOS */
479 writeb(0, baseAddr + Control_reg); /* restart */
480
481 msleep(2000);
482
483 switch (brd->boardType) {
484 case MOXA_BOARD_C218_ISA:
485 case MOXA_BOARD_C218_PCI:
486 tmp = readw(baseAddr + C218_key);
487 if (tmp != C218_KeyCode)
488 goto err;
489 break;
490 case MOXA_BOARD_CP204J:
491 tmp = readw(baseAddr + C218_key);
492 if (tmp != CP204J_KeyCode)
493 goto err;
494 break;
495 default:
496 tmp = readw(baseAddr + C320_key);
497 if (tmp != C320_KeyCode)
498 goto err;
499 tmp = readw(baseAddr + C320_status);
500 if (tmp != STS_init) {
501 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
502 "module not found\n");
503 return -EIO;
504 }
505 break;
506 }
507
508 return 0;
509err:
510 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
511 return -EIO;
512}
513
514static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
515 size_t len)
516{
517 void __iomem *baseAddr = brd->basemem;
518
519 if (len < 7168) {
520 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
521 return -EINVAL;
522 }
523
524 writew(len - 7168 - 2, baseAddr + C320bapi_len);
525 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
526 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
527 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
528 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
529
530 return 0;
531}
532
533static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
534 size_t len)
535{
536 void __iomem *baseAddr = brd->basemem;
537 const __le16 *uptr = ptr;
538 size_t wlen, len2, j;
539 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
540 unsigned int i, retry;
541 u16 usum, keycode;
542
543 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
544 C218_KeyCode;
545
546 switch (brd->boardType) {
547 case MOXA_BOARD_CP204J:
548 case MOXA_BOARD_C218_ISA:
549 case MOXA_BOARD_C218_PCI:
550 key = C218_key;
551 loadbuf = C218_LoadBuf;
552 loadlen = C218DLoad_len;
553 checksum = C218check_sum;
554 checksum_ok = C218chksum_ok;
555 break;
556 default:
557 key = C320_key;
558 keycode = C320_KeyCode;
559 loadbuf = C320_LoadBuf;
560 loadlen = C320DLoad_len;
561 checksum = C320check_sum;
562 checksum_ok = C320chksum_ok;
563 break;
564 }
565
566 usum = 0;
567 wlen = len >> 1;
568 for (i = 0; i < wlen; i++)
569 usum += le16_to_cpu(uptr[i]);
570 retry = 0;
571 do {
572 wlen = len >> 1;
573 j = 0;
574 while (wlen) {
575 len2 = (wlen > 2048) ? 2048 : wlen;
576 wlen -= len2;
577 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
578 j += len2 << 1;
579
580 writew(len2, baseAddr + loadlen);
581 writew(0, baseAddr + key);
582 for (i = 0; i < 100; i++) {
583 if (readw(baseAddr + key) == keycode)
584 break;
585 msleep(10);
586 }
587 if (readw(baseAddr + key) != keycode)
588 return -EIO;
589 }
590 writew(0, baseAddr + loadlen);
591 writew(usum, baseAddr + checksum);
592 writew(0, baseAddr + key);
593 for (i = 0; i < 100; i++) {
594 if (readw(baseAddr + key) == keycode)
595 break;
596 msleep(10);
597 }
598 retry++;
599 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
600 if (readb(baseAddr + checksum_ok) != 1)
601 return -EIO;
602
603 writew(0, baseAddr + key);
604 for (i = 0; i < 600; i++) {
605 if (readw(baseAddr + Magic_no) == Magic_code)
606 break;
607 msleep(10);
608 }
609 if (readw(baseAddr + Magic_no) != Magic_code)
610 return -EIO;
611
612 if (MOXA_IS_320(brd)) {
613 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
614 writew(0x3800, baseAddr + TMS320_PORT1);
615 writew(0x3900, baseAddr + TMS320_PORT2);
616 writew(28499, baseAddr + TMS320_CLOCK);
617 } else {
618 writew(0x3200, baseAddr + TMS320_PORT1);
619 writew(0x3400, baseAddr + TMS320_PORT2);
620 writew(19999, baseAddr + TMS320_CLOCK);
621 }
622 }
623 writew(1, baseAddr + Disable_IRQ);
624 writew(0, baseAddr + Magic_no);
625 for (i = 0; i < 500; i++) {
626 if (readw(baseAddr + Magic_no) == Magic_code)
627 break;
628 msleep(10);
629 }
630 if (readw(baseAddr + Magic_no) != Magic_code)
631 return -EIO;
632
633 if (MOXA_IS_320(brd)) {
634 j = readw(baseAddr + Module_cnt);
635 if (j <= 0)
636 return -EIO;
637 brd->numPorts = j * 8;
638 writew(j, baseAddr + Module_no);
639 writew(0, baseAddr + Magic_no);
640 for (i = 0; i < 600; i++) {
641 if (readw(baseAddr + Magic_no) == Magic_code)
642 break;
643 msleep(10);
644 }
645 if (readw(baseAddr + Magic_no) != Magic_code)
646 return -EIO;
647 }
648 brd->intNdx = baseAddr + IRQindex;
649 brd->intPend = baseAddr + IRQpending;
650 brd->intTable = baseAddr + IRQtable;
651
652 return 0;
653}
654
655static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
656 size_t len)
657{
658 void __iomem *ofsAddr, *baseAddr = brd->basemem;
659 struct moxa_port *port;
660 int retval, i;
661
662 if (len % 2) {
663 printk(KERN_ERR "MOXA: bios length is not even\n");
664 return -EINVAL;
665 }
666
667 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
668 if (retval)
669 return retval;
670
671 switch (brd->boardType) {
672 case MOXA_BOARD_C218_ISA:
673 case MOXA_BOARD_C218_PCI:
674 case MOXA_BOARD_CP204J:
675 port = brd->ports;
676 for (i = 0; i < brd->numPorts; i++, port++) {
677 port->board = brd;
678 port->DCDState = 0;
679 port->tableAddr = baseAddr + Extern_table +
680 Extern_size * i;
681 ofsAddr = port->tableAddr;
682 writew(C218rx_mask, ofsAddr + RX_mask);
683 writew(C218tx_mask, ofsAddr + TX_mask);
684 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
685 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
686
687 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
688 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
689
690 }
691 break;
692 default:
693 port = brd->ports;
694 for (i = 0; i < brd->numPorts; i++, port++) {
695 port->board = brd;
696 port->DCDState = 0;
697 port->tableAddr = baseAddr + Extern_table +
698 Extern_size * i;
699 ofsAddr = port->tableAddr;
700 switch (brd->numPorts) {
701 case 8:
702 writew(C320p8rx_mask, ofsAddr + RX_mask);
703 writew(C320p8tx_mask, ofsAddr + TX_mask);
704 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
705 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
706 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
707 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
708
709 break;
710 case 16:
711 writew(C320p16rx_mask, ofsAddr + RX_mask);
712 writew(C320p16tx_mask, ofsAddr + TX_mask);
713 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
714 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
715 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
716 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
717 break;
718
719 case 24:
720 writew(C320p24rx_mask, ofsAddr + RX_mask);
721 writew(C320p24tx_mask, ofsAddr + TX_mask);
722 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
723 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
724 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
725 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
726 break;
727 case 32:
728 writew(C320p32rx_mask, ofsAddr + RX_mask);
729 writew(C320p32tx_mask, ofsAddr + TX_mask);
730 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
731 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
732 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
733 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
734 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
735 break;
736 }
737 }
738 break;
739 }
740 return 0;
741}
742
743static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
744{
745 const void *ptr = fw->data;
746 char rsn[64];
747 u16 lens[5];
748 size_t len;
749 unsigned int a, lenp, lencnt;
750 int ret = -EINVAL;
751 struct {
752 __le32 magic; /* 0x34303430 */
753 u8 reserved1[2];
754 u8 type; /* UNIX = 3 */
755 u8 model; /* C218T=1, C320T=2, CP204=3 */
756 u8 reserved2[8];
757 __le16 len[5];
758 } const *hdr = ptr;
759
760 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
761
762 if (fw->size < MOXA_FW_HDRLEN) {
763 strcpy(rsn, "too short (even header won't fit)");
764 goto err;
765 }
766 if (hdr->magic != cpu_to_le32(0x30343034)) {
767 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
768 goto err;
769 }
770 if (hdr->type != 3) {
771 sprintf(rsn, "not for linux, type is %u", hdr->type);
772 goto err;
773 }
774 if (moxa_check_fw_model(brd, hdr->model)) {
775 sprintf(rsn, "not for this card, model is %u", hdr->model);
776 goto err;
777 }
778
779 len = MOXA_FW_HDRLEN;
780 lencnt = hdr->model == 2 ? 5 : 3;
781 for (a = 0; a < ARRAY_SIZE(lens); a++) {
782 lens[a] = le16_to_cpu(hdr->len[a]);
783 if (lens[a] && len + lens[a] <= fw->size &&
784 moxa_check_fw(&fw->data[len]))
785 printk(KERN_WARNING "MOXA firmware: unexpected input "
786 "at offset %u, but going on\n", (u32)len);
787 if (!lens[a] && a < lencnt) {
788 sprintf(rsn, "too few entries in fw file");
789 goto err;
790 }
791 len += lens[a];
792 }
793
794 if (len != fw->size) {
795 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
796 (u32)len);
797 goto err;
798 }
799
800 ptr += MOXA_FW_HDRLEN;
801 lenp = 0; /* bios */
802
803 strcpy(rsn, "read above");
804
805 ret = moxa_load_bios(brd, ptr, lens[lenp]);
806 if (ret)
807 goto err;
808
809 /* we skip the tty section (lens[1]), since we don't need it */
810 ptr += lens[lenp] + lens[lenp + 1];
811 lenp += 2; /* comm */
812
813 if (hdr->model == 2) {
814 ret = moxa_load_320b(brd, ptr, lens[lenp]);
815 if (ret)
816 goto err;
817 /* skip another tty */
818 ptr += lens[lenp] + lens[lenp + 1];
819 lenp += 2;
820 }
821
822 ret = moxa_load_code(brd, ptr, lens[lenp]);
823 if (ret)
824 goto err;
825
826 return 0;
827err:
828 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
829 return ret;
830}
831
832static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
833{
834 const struct firmware *fw;
835 const char *file;
836 struct moxa_port *p;
837 unsigned int i, first_idx;
838 int ret;
839
840 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
841 GFP_KERNEL);
842 if (brd->ports == NULL) {
843 printk(KERN_ERR "cannot allocate memory for ports\n");
844 ret = -ENOMEM;
845 goto err;
846 }
847
848 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
849 tty_port_init(&p->port);
850 p->port.ops = &moxa_port_ops;
851 p->type = PORT_16550A;
852 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
853 }
854
855 switch (brd->boardType) {
856 case MOXA_BOARD_C218_ISA:
857 case MOXA_BOARD_C218_PCI:
858 file = "c218tunx.cod";
859 break;
860 case MOXA_BOARD_CP204J:
861 file = "cp204unx.cod";
862 break;
863 default:
864 file = "c320tunx.cod";
865 break;
866 }
867
868 ret = request_firmware(&fw, file, dev);
869 if (ret) {
870 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
871 "you've placed '%s' file into your firmware "
872 "loader directory (e.g. /lib/firmware)\n",
873 file);
874 goto err_free;
875 }
876
877 ret = moxa_load_fw(brd, fw);
878
879 release_firmware(fw);
880
881 if (ret)
882 goto err_free;
883
884 spin_lock_bh(&moxa_lock);
885 brd->ready = 1;
886 if (!timer_pending(&moxaTimer))
887 mod_timer(&moxaTimer, jiffies + HZ / 50);
888 spin_unlock_bh(&moxa_lock);
889
890 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
891 for (i = 0; i < brd->numPorts; i++)
892 tty_port_register_device(&brd->ports[i].port, moxaDriver,
893 first_idx + i, dev);
894
895 return 0;
896err_free:
897 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
898 tty_port_destroy(&brd->ports[i].port);
899 kfree(brd->ports);
900err:
901 return ret;
902}
903
904static void moxa_board_deinit(struct moxa_board_conf *brd)
905{
906 unsigned int a, opened, first_idx;
907
908 mutex_lock(&moxa_openlock);
909 spin_lock_bh(&moxa_lock);
910 brd->ready = 0;
911 spin_unlock_bh(&moxa_lock);
912
913 /* pci hot-un-plug support */
914 for (a = 0; a < brd->numPorts; a++)
915 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
916 tty_port_tty_hangup(&brd->ports[a].port, false);
917
918 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
919 tty_port_destroy(&brd->ports[a].port);
920
921 while (1) {
922 opened = 0;
923 for (a = 0; a < brd->numPorts; a++)
924 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
925 opened++;
926 mutex_unlock(&moxa_openlock);
927 if (!opened)
928 break;
929 msleep(50);
930 mutex_lock(&moxa_openlock);
931 }
932
933 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
934 for (a = 0; a < brd->numPorts; a++)
935 tty_unregister_device(moxaDriver, first_idx + a);
936
937 iounmap(brd->basemem);
938 brd->basemem = NULL;
939 kfree(brd->ports);
940}
941
942#ifdef CONFIG_PCI
943static int moxa_pci_probe(struct pci_dev *pdev,
944 const struct pci_device_id *ent)
945{
946 struct moxa_board_conf *board;
947 unsigned int i;
948 int board_type = ent->driver_data;
949 int retval;
950
951 retval = pci_enable_device(pdev);
952 if (retval) {
953 dev_err(&pdev->dev, "can't enable pci device\n");
954 goto err;
955 }
956
957 for (i = 0; i < MAX_BOARDS; i++)
958 if (moxa_boards[i].basemem == NULL)
959 break;
960
961 retval = -ENODEV;
962 if (i >= MAX_BOARDS) {
963 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
964 "found. Board is ignored.\n", MAX_BOARDS);
965 goto err;
966 }
967
968 board = &moxa_boards[i];
969
970 retval = pci_request_region(pdev, 2, "moxa-base");
971 if (retval) {
972 dev_err(&pdev->dev, "can't request pci region 2\n");
973 goto err;
974 }
975
976 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
977 if (board->basemem == NULL) {
978 dev_err(&pdev->dev, "can't remap io space 2\n");
979 retval = -ENOMEM;
980 goto err_reg;
981 }
982
983 board->boardType = board_type;
984 switch (board_type) {
985 case MOXA_BOARD_C218_ISA:
986 case MOXA_BOARD_C218_PCI:
987 board->numPorts = 8;
988 break;
989
990 case MOXA_BOARD_CP204J:
991 board->numPorts = 4;
992 break;
993 default:
994 board->numPorts = 0;
995 break;
996 }
997 board->busType = MOXA_BUS_TYPE_PCI;
998
999 retval = moxa_init_board(board, &pdev->dev);
1000 if (retval)
1001 goto err_base;
1002
1003 pci_set_drvdata(pdev, board);
1004
1005 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1006 moxa_brdname[board_type - 1], board->numPorts);
1007
1008 return 0;
1009err_base:
1010 iounmap(board->basemem);
1011 board->basemem = NULL;
1012err_reg:
1013 pci_release_region(pdev, 2);
1014err:
1015 return retval;
1016}
1017
1018static void moxa_pci_remove(struct pci_dev *pdev)
1019{
1020 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1021
1022 moxa_board_deinit(brd);
1023
1024 pci_release_region(pdev, 2);
1025}
1026
1027static struct pci_driver moxa_pci_driver = {
1028 .name = "moxa",
1029 .id_table = moxa_pcibrds,
1030 .probe = moxa_pci_probe,
1031 .remove = moxa_pci_remove
1032};
1033#endif /* CONFIG_PCI */
1034
1035static int __init moxa_init(void)
1036{
1037 unsigned int isabrds = 0;
1038 int retval = 0;
1039 struct moxa_board_conf *brd = moxa_boards;
1040 unsigned int i;
1041
1042 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1043 MOXA_VERSION);
1044
1045 tty_port_init(&moxa_service_port);
1046
1047 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1048 TTY_DRIVER_REAL_RAW |
1049 TTY_DRIVER_DYNAMIC_DEV);
1050 if (IS_ERR(moxaDriver))
1051 return PTR_ERR(moxaDriver);
1052
1053 moxaDriver->name = "ttyMX";
1054 moxaDriver->major = ttymajor;
1055 moxaDriver->minor_start = 0;
1056 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1057 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1058 moxaDriver->init_termios = tty_std_termios;
1059 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1060 moxaDriver->init_termios.c_ispeed = 9600;
1061 moxaDriver->init_termios.c_ospeed = 9600;
1062 tty_set_operations(moxaDriver, &moxa_ops);
1063 /* Having one more port only for ioctls is ugly */
1064 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1065
1066 if (tty_register_driver(moxaDriver)) {
1067 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1068 put_tty_driver(moxaDriver);
1069 return -1;
1070 }
1071
1072 /* Find the boards defined from module args. */
1073
1074 for (i = 0; i < MAX_BOARDS; i++) {
1075 if (!baseaddr[i])
1076 break;
1077 if (type[i] == MOXA_BOARD_C218_ISA ||
1078 type[i] == MOXA_BOARD_C320_ISA) {
1079 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1080 isabrds + 1, moxa_brdname[type[i] - 1],
1081 baseaddr[i]);
1082 brd->boardType = type[i];
1083 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1084 numports[i];
1085 brd->busType = MOXA_BUS_TYPE_ISA;
1086 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1087 if (!brd->basemem) {
1088 printk(KERN_ERR "MOXA: can't remap %lx\n",
1089 baseaddr[i]);
1090 continue;
1091 }
1092 if (moxa_init_board(brd, NULL)) {
1093 iounmap(brd->basemem);
1094 brd->basemem = NULL;
1095 continue;
1096 }
1097
1098 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
1099 "ready (%u ports, firmware loaded)\n",
1100 baseaddr[i], brd->numPorts);
1101
1102 brd++;
1103 isabrds++;
1104 }
1105 }
1106
1107#ifdef CONFIG_PCI
1108 retval = pci_register_driver(&moxa_pci_driver);
1109 if (retval) {
1110 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1111 if (isabrds)
1112 retval = 0;
1113 }
1114#endif
1115
1116 return retval;
1117}
1118
1119static void __exit moxa_exit(void)
1120{
1121 unsigned int i;
1122
1123#ifdef CONFIG_PCI
1124 pci_unregister_driver(&moxa_pci_driver);
1125#endif
1126
1127 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1128 if (moxa_boards[i].ready)
1129 moxa_board_deinit(&moxa_boards[i]);
1130
1131 del_timer_sync(&moxaTimer);
1132
1133 if (tty_unregister_driver(moxaDriver))
1134 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1135 "serial driver\n");
1136 put_tty_driver(moxaDriver);
1137}
1138
1139module_init(moxa_init);
1140module_exit(moxa_exit);
1141
1142static void moxa_shutdown(struct tty_port *port)
1143{
1144 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1145 MoxaPortDisable(ch);
1146 MoxaPortFlushData(ch, 2);
1147}
1148
1149static int moxa_carrier_raised(struct tty_port *port)
1150{
1151 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1152 int dcd;
1153
1154 spin_lock_irq(&port->lock);
1155 dcd = ch->DCDState;
1156 spin_unlock_irq(&port->lock);
1157 return dcd;
1158}
1159
1160static void moxa_dtr_rts(struct tty_port *port, int onoff)
1161{
1162 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1163 MoxaPortLineCtrl(ch, onoff, onoff);
1164}
1165
1166
1167static int moxa_open(struct tty_struct *tty, struct file *filp)
1168{
1169 struct moxa_board_conf *brd;
1170 struct moxa_port *ch;
1171 int port;
1172
1173 port = tty->index;
1174 if (port == MAX_PORTS) {
1175 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1176 }
1177 if (mutex_lock_interruptible(&moxa_openlock))
1178 return -ERESTARTSYS;
1179 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1180 if (!brd->ready) {
1181 mutex_unlock(&moxa_openlock);
1182 return -ENODEV;
1183 }
1184
1185 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1186 mutex_unlock(&moxa_openlock);
1187 return -ENODEV;
1188 }
1189
1190 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1191 ch->port.count++;
1192 tty->driver_data = ch;
1193 tty_port_tty_set(&ch->port, tty);
1194 mutex_lock(&ch->port.mutex);
1195 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1196 ch->statusflags = 0;
1197 moxa_set_tty_param(tty, &tty->termios);
1198 MoxaPortLineCtrl(ch, 1, 1);
1199 MoxaPortEnable(ch);
1200 MoxaSetFifo(ch, ch->type == PORT_16550A);
1201 ch->port.flags |= ASYNC_INITIALIZED;
1202 }
1203 mutex_unlock(&ch->port.mutex);
1204 mutex_unlock(&moxa_openlock);
1205
1206 return tty_port_block_til_ready(&ch->port, tty, filp);
1207}
1208
1209static void moxa_close(struct tty_struct *tty, struct file *filp)
1210{
1211 struct moxa_port *ch = tty->driver_data;
1212 ch->cflag = tty->termios.c_cflag;
1213 tty_port_close(&ch->port, tty, filp);
1214}
1215
1216static int moxa_write(struct tty_struct *tty,
1217 const unsigned char *buf, int count)
1218{
1219 struct moxa_port *ch = tty->driver_data;
1220 unsigned long flags;
1221 int len;
1222
1223 if (ch == NULL)
1224 return 0;
1225
1226 spin_lock_irqsave(&moxa_lock, flags);
1227 len = MoxaPortWriteData(tty, buf, count);
1228 spin_unlock_irqrestore(&moxa_lock, flags);
1229
1230 set_bit(LOWWAIT, &ch->statusflags);
1231 return len;
1232}
1233
1234static int moxa_write_room(struct tty_struct *tty)
1235{
1236 struct moxa_port *ch;
1237
1238 if (tty->stopped)
1239 return 0;
1240 ch = tty->driver_data;
1241 if (ch == NULL)
1242 return 0;
1243 return MoxaPortTxFree(ch);
1244}
1245
1246static void moxa_flush_buffer(struct tty_struct *tty)
1247{
1248 struct moxa_port *ch = tty->driver_data;
1249
1250 if (ch == NULL)
1251 return;
1252 MoxaPortFlushData(ch, 1);
1253 tty_wakeup(tty);
1254}
1255
1256static int moxa_chars_in_buffer(struct tty_struct *tty)
1257{
1258 struct moxa_port *ch = tty->driver_data;
1259 int chars;
1260
1261 chars = MoxaPortTxQueue(ch);
1262 if (chars)
1263 /*
1264 * Make it possible to wakeup anything waiting for output
1265 * in tty_ioctl.c, etc.
1266 */
1267 set_bit(EMPTYWAIT, &ch->statusflags);
1268 return chars;
1269}
1270
1271static int moxa_tiocmget(struct tty_struct *tty)
1272{
1273 struct moxa_port *ch = tty->driver_data;
1274 int flag = 0, dtr, rts;
1275
1276 MoxaPortGetLineOut(ch, &dtr, &rts);
1277 if (dtr)
1278 flag |= TIOCM_DTR;
1279 if (rts)
1280 flag |= TIOCM_RTS;
1281 dtr = MoxaPortLineStatus(ch);
1282 if (dtr & 1)
1283 flag |= TIOCM_CTS;
1284 if (dtr & 2)
1285 flag |= TIOCM_DSR;
1286 if (dtr & 4)
1287 flag |= TIOCM_CD;
1288 return flag;
1289}
1290
1291static int moxa_tiocmset(struct tty_struct *tty,
1292 unsigned int set, unsigned int clear)
1293{
1294 struct moxa_port *ch;
1295 int dtr, rts;
1296
1297 mutex_lock(&moxa_openlock);
1298 ch = tty->driver_data;
1299 if (!ch) {
1300 mutex_unlock(&moxa_openlock);
1301 return -EINVAL;
1302 }
1303
1304 MoxaPortGetLineOut(ch, &dtr, &rts);
1305 if (set & TIOCM_RTS)
1306 rts = 1;
1307 if (set & TIOCM_DTR)
1308 dtr = 1;
1309 if (clear & TIOCM_RTS)
1310 rts = 0;
1311 if (clear & TIOCM_DTR)
1312 dtr = 0;
1313 MoxaPortLineCtrl(ch, dtr, rts);
1314 mutex_unlock(&moxa_openlock);
1315 return 0;
1316}
1317
1318static void moxa_set_termios(struct tty_struct *tty,
1319 struct ktermios *old_termios)
1320{
1321 struct moxa_port *ch = tty->driver_data;
1322
1323 if (ch == NULL)
1324 return;
1325 moxa_set_tty_param(tty, old_termios);
1326 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1327 wake_up_interruptible(&ch->port.open_wait);
1328}
1329
1330static void moxa_stop(struct tty_struct *tty)
1331{
1332 struct moxa_port *ch = tty->driver_data;
1333
1334 if (ch == NULL)
1335 return;
1336 MoxaPortTxDisable(ch);
1337 set_bit(TXSTOPPED, &ch->statusflags);
1338}
1339
1340
1341static void moxa_start(struct tty_struct *tty)
1342{
1343 struct moxa_port *ch = tty->driver_data;
1344
1345 if (ch == NULL)
1346 return;
1347
1348 if (!test_bit(TXSTOPPED, &ch->statusflags))
1349 return;
1350
1351 MoxaPortTxEnable(ch);
1352 clear_bit(TXSTOPPED, &ch->statusflags);
1353}
1354
1355static void moxa_hangup(struct tty_struct *tty)
1356{
1357 struct moxa_port *ch = tty->driver_data;
1358 tty_port_hangup(&ch->port);
1359}
1360
1361static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1362{
1363 unsigned long flags;
1364 dcd = !!dcd;
1365
1366 spin_lock_irqsave(&p->port.lock, flags);
1367 if (dcd != p->DCDState) {
1368 p->DCDState = dcd;
1369 spin_unlock_irqrestore(&p->port.lock, flags);
1370 if (!dcd)
1371 tty_port_tty_hangup(&p->port, true);
1372 }
1373 else
1374 spin_unlock_irqrestore(&p->port.lock, flags);
1375}
1376
1377static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1378 u16 __iomem *ip)
1379{
1380 struct tty_struct *tty = tty_port_tty_get(&p->port);
1381 void __iomem *ofsAddr;
1382 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1383 u16 intr;
1384
1385 if (tty) {
1386 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1387 MoxaPortTxQueue(p) == 0) {
1388 clear_bit(EMPTYWAIT, &p->statusflags);
1389 tty_wakeup(tty);
1390 }
1391 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1392 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1393 clear_bit(LOWWAIT, &p->statusflags);
1394 tty_wakeup(tty);
1395 }
1396
1397 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
1398 MoxaPortRxQueue(p) > 0) { /* RX */
1399 MoxaPortReadData(p);
1400 tty_schedule_flip(&p->port);
1401 }
1402 } else {
1403 clear_bit(EMPTYWAIT, &p->statusflags);
1404 MoxaPortFlushData(p, 0); /* flush RX */
1405 }
1406
1407 if (!handle) /* nothing else to do */
1408 goto put;
1409
1410 intr = readw(ip); /* port irq status */
1411 if (intr == 0)
1412 goto put;
1413
1414 writew(0, ip); /* ACK port */
1415 ofsAddr = p->tableAddr;
1416 if (intr & IntrTx) /* disable tx intr */
1417 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1418 ofsAddr + HostStat);
1419
1420 if (!inited)
1421 goto put;
1422
1423 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1424 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
1425 tty_schedule_flip(&p->port);
1426 }
1427
1428 if (intr & IntrLine)
1429 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1430put:
1431 tty_kref_put(tty);
1432
1433 return 0;
1434}
1435
1436static void moxa_poll(unsigned long ignored)
1437{
1438 struct moxa_board_conf *brd;
1439 u16 __iomem *ip;
1440 unsigned int card, port, served = 0;
1441
1442 spin_lock(&moxa_lock);
1443 for (card = 0; card < MAX_BOARDS; card++) {
1444 brd = &moxa_boards[card];
1445 if (!brd->ready)
1446 continue;
1447
1448 served++;
1449
1450 ip = NULL;
1451 if (readb(brd->intPend) == 0xff)
1452 ip = brd->intTable + readb(brd->intNdx);
1453
1454 for (port = 0; port < brd->numPorts; port++)
1455 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1456
1457 if (ip)
1458 writeb(0, brd->intPend); /* ACK */
1459
1460 if (moxaLowWaterChk) {
1461 struct moxa_port *p = brd->ports;
1462 for (port = 0; port < brd->numPorts; port++, p++)
1463 if (p->lowChkFlag) {
1464 p->lowChkFlag = 0;
1465 moxa_low_water_check(p->tableAddr);
1466 }
1467 }
1468 }
1469 moxaLowWaterChk = 0;
1470
1471 if (served)
1472 mod_timer(&moxaTimer, jiffies + HZ / 50);
1473 spin_unlock(&moxa_lock);
1474}
1475
1476/******************************************************************************/
1477
1478static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1479{
1480 register struct ktermios *ts = &tty->termios;
1481 struct moxa_port *ch = tty->driver_data;
1482 int rts, cts, txflow, rxflow, xany, baud;
1483
1484 rts = cts = txflow = rxflow = xany = 0;
1485 if (ts->c_cflag & CRTSCTS)
1486 rts = cts = 1;
1487 if (ts->c_iflag & IXON)
1488 txflow = 1;
1489 if (ts->c_iflag & IXOFF)
1490 rxflow = 1;
1491 if (ts->c_iflag & IXANY)
1492 xany = 1;
1493
1494 /* Clear the features we don't support */
1495 ts->c_cflag &= ~CMSPAR;
1496 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1497 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1498 if (baud == -1)
1499 baud = tty_termios_baud_rate(old_termios);
1500 /* Not put the baud rate into the termios data */
1501 tty_encode_baud_rate(tty, baud, baud);
1502}
1503
1504/*****************************************************************************
1505 * Driver level functions: *
1506 *****************************************************************************/
1507
1508static void MoxaPortFlushData(struct moxa_port *port, int mode)
1509{
1510 void __iomem *ofsAddr;
1511 if (mode < 0 || mode > 2)
1512 return;
1513 ofsAddr = port->tableAddr;
1514 moxafunc(ofsAddr, FC_FlushQueue, mode);
1515 if (mode != 1) {
1516 port->lowChkFlag = 0;
1517 moxa_low_water_check(ofsAddr);
1518 }
1519}
1520
1521/*
1522 * Moxa Port Number Description:
1523 *
1524 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1525 * the port number using in MOXA driver functions will be 0 to 31 for
1526 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1527 * to 127 for fourth. For example, if you setup three MOXA boards,
1528 * first board is C218, second board is C320-16 and third board is
1529 * C320-32. The port number of first board (C218 - 8 ports) is from
1530 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1531 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1532 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1533 * 127 will be invalid.
1534 *
1535 *
1536 * Moxa Functions Description:
1537 *
1538 * Function 1: Driver initialization routine, this routine must be
1539 * called when initialized driver.
1540 * Syntax:
1541 * void MoxaDriverInit();
1542 *
1543 *
1544 * Function 2: Moxa driver private IOCTL command processing.
1545 * Syntax:
1546 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1547 *
1548 * unsigned int cmd : IOCTL command
1549 * unsigned long arg : IOCTL argument
1550 * int port : port number (0 - 127)
1551 *
1552 * return: 0 (OK)
1553 * -EINVAL
1554 * -ENOIOCTLCMD
1555 *
1556 *
1557 * Function 6: Enable this port to start Tx/Rx data.
1558 * Syntax:
1559 * void MoxaPortEnable(int port);
1560 * int port : port number (0 - 127)
1561 *
1562 *
1563 * Function 7: Disable this port
1564 * Syntax:
1565 * void MoxaPortDisable(int port);
1566 * int port : port number (0 - 127)
1567 *
1568 *
1569 * Function 10: Setting baud rate of this port.
1570 * Syntax:
1571 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1572 * int port : port number (0 - 127)
1573 * long baud : baud rate (50 - 115200)
1574 *
1575 * return: 0 : this port is invalid or baud < 50
1576 * 50 - 115200 : the real baud rate set to the port, if
1577 * the argument baud is large than maximun
1578 * available baud rate, the real setting
1579 * baud rate will be the maximun baud rate.
1580 *
1581 *
1582 * Function 12: Configure the port.
1583 * Syntax:
1584 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1585 * int port : port number (0 - 127)
1586 * struct ktermios * termio : termio structure pointer
1587 * speed_t baud : baud rate
1588 *
1589 * return: -1 : this port is invalid or termio == NULL
1590 * 0 : setting O.K.
1591 *
1592 *
1593 * Function 13: Get the DTR/RTS state of this port.
1594 * Syntax:
1595 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1596 * int port : port number (0 - 127)
1597 * int * dtrState : pointer to INT to receive the current DTR
1598 * state. (if NULL, this function will not
1599 * write to this address)
1600 * int * rtsState : pointer to INT to receive the current RTS
1601 * state. (if NULL, this function will not
1602 * write to this address)
1603 *
1604 * return: -1 : this port is invalid
1605 * 0 : O.K.
1606 *
1607 *
1608 * Function 14: Setting the DTR/RTS output state of this port.
1609 * Syntax:
1610 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1611 * int port : port number (0 - 127)
1612 * int dtrState : DTR output state (0: off, 1: on)
1613 * int rtsState : RTS output state (0: off, 1: on)
1614 *
1615 *
1616 * Function 15: Setting the flow control of this port.
1617 * Syntax:
1618 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1619 * int txFlow,int xany);
1620 * int port : port number (0 - 127)
1621 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1622 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1623 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1624 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1625 * int xany : S/W XANY flow control (0: no, 1: yes)
1626 *
1627 *
1628 * Function 16: Get ths line status of this port
1629 * Syntax:
1630 * int MoxaPortLineStatus(int port);
1631 * int port : port number (0 - 127)
1632 *
1633 * return: Bit 0 - CTS state (0: off, 1: on)
1634 * Bit 1 - DSR state (0: off, 1: on)
1635 * Bit 2 - DCD state (0: off, 1: on)
1636 *
1637 *
1638 * Function 19: Flush the Rx/Tx buffer data of this port.
1639 * Syntax:
1640 * void MoxaPortFlushData(int port, int mode);
1641 * int port : port number (0 - 127)
1642 * int mode
1643 * 0 : flush the Rx buffer
1644 * 1 : flush the Tx buffer
1645 * 2 : flush the Rx and Tx buffer
1646 *
1647 *
1648 * Function 20: Write data.
1649 * Syntax:
1650 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1651 * int port : port number (0 - 127)
1652 * unsigned char * buffer : pointer to write data buffer.
1653 * int length : write data length
1654 *
1655 * return: 0 - length : real write data length
1656 *
1657 *
1658 * Function 21: Read data.
1659 * Syntax:
1660 * int MoxaPortReadData(int port, struct tty_struct *tty);
1661 * int port : port number (0 - 127)
1662 * struct tty_struct *tty : tty for data
1663 *
1664 * return: 0 - length : real read data length
1665 *
1666 *
1667 * Function 24: Get the Tx buffer current queued data bytes
1668 * Syntax:
1669 * int MoxaPortTxQueue(int port);
1670 * int port : port number (0 - 127)
1671 *
1672 * return: .. : Tx buffer current queued data bytes
1673 *
1674 *
1675 * Function 25: Get the Tx buffer current free space
1676 * Syntax:
1677 * int MoxaPortTxFree(int port);
1678 * int port : port number (0 - 127)
1679 *
1680 * return: .. : Tx buffer current free space
1681 *
1682 *
1683 * Function 26: Get the Rx buffer current queued data bytes
1684 * Syntax:
1685 * int MoxaPortRxQueue(int port);
1686 * int port : port number (0 - 127)
1687 *
1688 * return: .. : Rx buffer current queued data bytes
1689 *
1690 *
1691 * Function 28: Disable port data transmission.
1692 * Syntax:
1693 * void MoxaPortTxDisable(int port);
1694 * int port : port number (0 - 127)
1695 *
1696 *
1697 * Function 29: Enable port data transmission.
1698 * Syntax:
1699 * void MoxaPortTxEnable(int port);
1700 * int port : port number (0 - 127)
1701 *
1702 *
1703 * Function 31: Get the received BREAK signal count and reset it.
1704 * Syntax:
1705 * int MoxaPortResetBrkCnt(int port);
1706 * int port : port number (0 - 127)
1707 *
1708 * return: 0 - .. : BREAK signal count
1709 *
1710 *
1711 */
1712
1713static void MoxaPortEnable(struct moxa_port *port)
1714{
1715 void __iomem *ofsAddr;
1716 u16 lowwater = 512;
1717
1718 ofsAddr = port->tableAddr;
1719 writew(lowwater, ofsAddr + Low_water);
1720 if (MOXA_IS_320(port->board))
1721 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1722 else
1723 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1724 ofsAddr + HostStat);
1725
1726 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1727 moxafunc(ofsAddr, FC_FlushQueue, 2);
1728
1729 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1730 MoxaPortLineStatus(port);
1731}
1732
1733static void MoxaPortDisable(struct moxa_port *port)
1734{
1735 void __iomem *ofsAddr = port->tableAddr;
1736
1737 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1738 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1739 writew(0, ofsAddr + HostStat);
1740 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1741}
1742
1743static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1744{
1745 void __iomem *ofsAddr = port->tableAddr;
1746 unsigned int clock, val;
1747 speed_t max;
1748
1749 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1750 if (baud < 50)
1751 return 0;
1752 if (baud > max)
1753 baud = max;
1754 clock = 921600;
1755 val = clock / baud;
1756 moxafunc(ofsAddr, FC_SetBaud, val);
1757 baud = clock / val;
1758 return baud;
1759}
1760
1761static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1762 speed_t baud)
1763{
1764 void __iomem *ofsAddr;
1765 tcflag_t mode = 0;
1766
1767 ofsAddr = port->tableAddr;
1768
1769 mode = termio->c_cflag & CSIZE;
1770 if (mode == CS5)
1771 mode = MX_CS5;
1772 else if (mode == CS6)
1773 mode = MX_CS6;
1774 else if (mode == CS7)
1775 mode = MX_CS7;
1776 else if (mode == CS8)
1777 mode = MX_CS8;
1778
1779 if (termio->c_cflag & CSTOPB) {
1780 if (mode == MX_CS5)
1781 mode |= MX_STOP15;
1782 else
1783 mode |= MX_STOP2;
1784 } else
1785 mode |= MX_STOP1;
1786
1787 if (termio->c_cflag & PARENB) {
1788 if (termio->c_cflag & PARODD)
1789 mode |= MX_PARODD;
1790 else
1791 mode |= MX_PAREVEN;
1792 } else
1793 mode |= MX_PARNONE;
1794
1795 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1796
1797 if (MOXA_IS_320(port->board) && baud >= 921600)
1798 return -1;
1799
1800 baud = MoxaPortSetBaud(port, baud);
1801
1802 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1803 spin_lock_irq(&moxafunc_lock);
1804 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1805 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1806 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1807 moxa_wait_finish(ofsAddr);
1808 spin_unlock_irq(&moxafunc_lock);
1809
1810 }
1811 return baud;
1812}
1813
1814static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1815 int *rtsState)
1816{
1817 if (dtrState)
1818 *dtrState = !!(port->lineCtrl & DTR_ON);
1819 if (rtsState)
1820 *rtsState = !!(port->lineCtrl & RTS_ON);
1821
1822 return 0;
1823}
1824
1825static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1826{
1827 u8 mode = 0;
1828
1829 if (dtr)
1830 mode |= DTR_ON;
1831 if (rts)
1832 mode |= RTS_ON;
1833 port->lineCtrl = mode;
1834 moxafunc(port->tableAddr, FC_LineControl, mode);
1835}
1836
1837static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1838 int txflow, int rxflow, int txany)
1839{
1840 int mode = 0;
1841
1842 if (rts)
1843 mode |= RTS_FlowCtl;
1844 if (cts)
1845 mode |= CTS_FlowCtl;
1846 if (txflow)
1847 mode |= Tx_FlowCtl;
1848 if (rxflow)
1849 mode |= Rx_FlowCtl;
1850 if (txany)
1851 mode |= IXM_IXANY;
1852 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1853}
1854
1855static int MoxaPortLineStatus(struct moxa_port *port)
1856{
1857 void __iomem *ofsAddr;
1858 int val;
1859
1860 ofsAddr = port->tableAddr;
1861 if (MOXA_IS_320(port->board))
1862 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1863 else
1864 val = readw(ofsAddr + FlagStat) >> 4;
1865 val &= 0x0B;
1866 if (val & 8)
1867 val |= 4;
1868 moxa_new_dcdstate(port, val & 8);
1869 val &= 7;
1870 return val;
1871}
1872
1873static int MoxaPortWriteData(struct tty_struct *tty,
1874 const unsigned char *buffer, int len)
1875{
1876 struct moxa_port *port = tty->driver_data;
1877 void __iomem *baseAddr, *ofsAddr, *ofs;
1878 unsigned int c, total;
1879 u16 head, tail, tx_mask, spage, epage;
1880 u16 pageno, pageofs, bufhead;
1881
1882 ofsAddr = port->tableAddr;
1883 baseAddr = port->board->basemem;
1884 tx_mask = readw(ofsAddr + TX_mask);
1885 spage = readw(ofsAddr + Page_txb);
1886 epage = readw(ofsAddr + EndPage_txb);
1887 tail = readw(ofsAddr + TXwptr);
1888 head = readw(ofsAddr + TXrptr);
1889 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1890 if (c > len)
1891 c = len;
1892 moxaLog.txcnt[port->port.tty->index] += c;
1893 total = c;
1894 if (spage == epage) {
1895 bufhead = readw(ofsAddr + Ofs_txb);
1896 writew(spage, baseAddr + Control_reg);
1897 while (c > 0) {
1898 if (head > tail)
1899 len = head - tail - 1;
1900 else
1901 len = tx_mask + 1 - tail;
1902 len = (c > len) ? len : c;
1903 ofs = baseAddr + DynPage_addr + bufhead + tail;
1904 memcpy_toio(ofs, buffer, len);
1905 buffer += len;
1906 tail = (tail + len) & tx_mask;
1907 c -= len;
1908 }
1909 } else {
1910 pageno = spage + (tail >> 13);
1911 pageofs = tail & Page_mask;
1912 while (c > 0) {
1913 len = Page_size - pageofs;
1914 if (len > c)
1915 len = c;
1916 writeb(pageno, baseAddr + Control_reg);
1917 ofs = baseAddr + DynPage_addr + pageofs;
1918 memcpy_toio(ofs, buffer, len);
1919 buffer += len;
1920 if (++pageno == epage)
1921 pageno = spage;
1922 pageofs = 0;
1923 c -= len;
1924 }
1925 tail = (tail + total) & tx_mask;
1926 }
1927 writew(tail, ofsAddr + TXwptr);
1928 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1929 return total;
1930}
1931
1932static int MoxaPortReadData(struct moxa_port *port)
1933{
1934 struct tty_struct *tty = port->port.tty;
1935 unsigned char *dst;
1936 void __iomem *baseAddr, *ofsAddr, *ofs;
1937 unsigned int count, len, total;
1938 u16 tail, rx_mask, spage, epage;
1939 u16 pageno, pageofs, bufhead, head;
1940
1941 ofsAddr = port->tableAddr;
1942 baseAddr = port->board->basemem;
1943 head = readw(ofsAddr + RXrptr);
1944 tail = readw(ofsAddr + RXwptr);
1945 rx_mask = readw(ofsAddr + RX_mask);
1946 spage = readw(ofsAddr + Page_rxb);
1947 epage = readw(ofsAddr + EndPage_rxb);
1948 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1949 if (count == 0)
1950 return 0;
1951
1952 total = count;
1953 moxaLog.rxcnt[tty->index] += total;
1954 if (spage == epage) {
1955 bufhead = readw(ofsAddr + Ofs_rxb);
1956 writew(spage, baseAddr + Control_reg);
1957 while (count > 0) {
1958 ofs = baseAddr + DynPage_addr + bufhead + head;
1959 len = (tail >= head) ? (tail - head) :
1960 (rx_mask + 1 - head);
1961 len = tty_prepare_flip_string(&port->port, &dst,
1962 min(len, count));
1963 memcpy_fromio(dst, ofs, len);
1964 head = (head + len) & rx_mask;
1965 count -= len;
1966 }
1967 } else {
1968 pageno = spage + (head >> 13);
1969 pageofs = head & Page_mask;
1970 while (count > 0) {
1971 writew(pageno, baseAddr + Control_reg);
1972 ofs = baseAddr + DynPage_addr + pageofs;
1973 len = tty_prepare_flip_string(&port->port, &dst,
1974 min(Page_size - pageofs, count));
1975 memcpy_fromio(dst, ofs, len);
1976
1977 count -= len;
1978 pageofs = (pageofs + len) & Page_mask;
1979 if (pageofs == 0 && ++pageno == epage)
1980 pageno = spage;
1981 }
1982 head = (head + total) & rx_mask;
1983 }
1984 writew(head, ofsAddr + RXrptr);
1985 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1986 moxaLowWaterChk = 1;
1987 port->lowChkFlag = 1;
1988 }
1989 return total;
1990}
1991
1992
1993static int MoxaPortTxQueue(struct moxa_port *port)
1994{
1995 void __iomem *ofsAddr = port->tableAddr;
1996 u16 rptr, wptr, mask;
1997
1998 rptr = readw(ofsAddr + TXrptr);
1999 wptr = readw(ofsAddr + TXwptr);
2000 mask = readw(ofsAddr + TX_mask);
2001 return (wptr - rptr) & mask;
2002}
2003
2004static int MoxaPortTxFree(struct moxa_port *port)
2005{
2006 void __iomem *ofsAddr = port->tableAddr;
2007 u16 rptr, wptr, mask;
2008
2009 rptr = readw(ofsAddr + TXrptr);
2010 wptr = readw(ofsAddr + TXwptr);
2011 mask = readw(ofsAddr + TX_mask);
2012 return mask - ((wptr - rptr) & mask);
2013}
2014
2015static int MoxaPortRxQueue(struct moxa_port *port)
2016{
2017 void __iomem *ofsAddr = port->tableAddr;
2018 u16 rptr, wptr, mask;
2019
2020 rptr = readw(ofsAddr + RXrptr);
2021 wptr = readw(ofsAddr + RXwptr);
2022 mask = readw(ofsAddr + RX_mask);
2023 return (wptr - rptr) & mask;
2024}
2025
2026static void MoxaPortTxDisable(struct moxa_port *port)
2027{
2028 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2029}
2030
2031static void MoxaPortTxEnable(struct moxa_port *port)
2032{
2033 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2034}
2035
2036static int moxa_get_serial_info(struct moxa_port *info,
2037 struct serial_struct __user *retinfo)
2038{
2039 struct serial_struct tmp = {
2040 .type = info->type,
2041 .line = info->port.tty->index,
2042 .flags = info->port.flags,
2043 .baud_base = 921600,
2044 .close_delay = info->port.close_delay
2045 };
2046 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2047}
2048
2049
2050static int moxa_set_serial_info(struct moxa_port *info,
2051 struct serial_struct __user *new_info)
2052{
2053 struct serial_struct new_serial;
2054
2055 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2056 return -EFAULT;
2057
2058 if (new_serial.irq != 0 || new_serial.port != 0 ||
2059 new_serial.custom_divisor != 0 ||
2060 new_serial.baud_base != 921600)
2061 return -EPERM;
2062
2063 if (!capable(CAP_SYS_ADMIN)) {
2064 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2065 (info->port.flags & ~ASYNC_USR_MASK)))
2066 return -EPERM;
2067 } else
2068 info->port.close_delay = new_serial.close_delay * HZ / 100;
2069
2070 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2071 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2072
2073 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2074
2075 info->type = new_serial.type;
2076 return 0;
2077}
2078
2079
2080
2081/*****************************************************************************
2082 * Static local functions: *
2083 *****************************************************************************/
2084
2085static void MoxaSetFifo(struct moxa_port *port, int enable)
2086{
2087 void __iomem *ofsAddr = port->tableAddr;
2088
2089 if (!enable) {
2090 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2091 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2092 } else {
2093 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2094 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2095 }
2096}
1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
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.
15 */
16
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.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/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46#include <linux/slab.h>
47#include <linux/ratelimit.h>
48
49#include <asm/io.h>
50#include <asm/uaccess.h>
51
52#include "moxa.h"
53
54#define MOXA_VERSION "6.0k"
55
56#define MOXA_FW_HDRLEN 32
57
58#define MOXAMAJOR 172
59
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)
63
64#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
66
67/*
68 * Define the Moxa PCI vendor and device IDs.
69 */
70#define MOXA_BUS_TYPE_ISA 0
71#define MOXA_BUS_TYPE_PCI 1
72
73enum {
74 MOXA_BOARD_C218_PCI = 1,
75 MOXA_BOARD_C218_ISA,
76 MOXA_BOARD_C320_PCI,
77 MOXA_BOARD_C320_ISA,
78 MOXA_BOARD_CP204J,
79};
80
81static char *moxa_brdname[] =
82{
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
87 "CP-204J series",
88};
89
90#ifdef CONFIG_PCI
91static 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 },
98 { 0 }
99};
100MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101#endif /* CONFIG_PCI */
102
103struct moxa_port;
104
105static struct moxa_board_conf {
106 int boardType;
107 int numPorts;
108 int busType;
109
110 unsigned int ready;
111
112 struct moxa_port *ports;
113
114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118} moxa_boards[MAX_BOARDS];
119
120struct mxser_mstatus {
121 tcflag_t cflag;
122 int cts;
123 int dsr;
124 int ri;
125 int dcd;
126};
127
128struct moxaq_str {
129 int inq;
130 int outq;
131};
132
133struct moxa_port {
134 struct tty_port port;
135 struct moxa_board_conf *board;
136 void __iomem *tableAddr;
137
138 int type;
139 int cflag;
140 unsigned long statusflags;
141
142 u8 DCDState; /* Protected by the port lock */
143 u8 lineCtrl;
144 u8 lowChkFlag;
145};
146
147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
153/* statusflags */
154#define TXSTOPPED 1
155#define LOWWAIT 2
156#define EMPTYWAIT 3
157
158#define SERIAL_DO_RESTART
159
160#define WAKEUP_CHARS 256
161
162static int ttymajor = MOXAMAJOR;
163static struct mon_str moxaLog;
164static unsigned int moxaFuncTout = HZ / 2;
165static unsigned int moxaLowWaterChk;
166static DEFINE_MUTEX(moxa_openlock);
167static DEFINE_SPINLOCK(moxa_lock);
168
169static unsigned long baseaddr[MAX_BOARDS];
170static unsigned int type[MAX_BOARDS];
171static unsigned int numports[MAX_BOARDS];
172static struct tty_port moxa_service_port;
173
174MODULE_AUTHOR("William Chen");
175MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
176MODULE_LICENSE("GPL");
177MODULE_FIRMWARE("c218tunx.cod");
178MODULE_FIRMWARE("cp204unx.cod");
179MODULE_FIRMWARE("c320tunx.cod");
180
181module_param_array(type, uint, NULL, 0);
182MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
183module_param_array(baseaddr, ulong, NULL, 0);
184MODULE_PARM_DESC(baseaddr, "base address");
185module_param_array(numports, uint, NULL, 0);
186MODULE_PARM_DESC(numports, "numports (ignored for C218)");
187
188module_param(ttymajor, int, 0);
189
190/*
191 * static functions:
192 */
193static int moxa_open(struct tty_struct *, struct file *);
194static void moxa_close(struct tty_struct *, struct file *);
195static int moxa_write(struct tty_struct *, const unsigned char *, int);
196static int moxa_write_room(struct tty_struct *);
197static void moxa_flush_buffer(struct tty_struct *);
198static int moxa_chars_in_buffer(struct tty_struct *);
199static void moxa_set_termios(struct tty_struct *, struct ktermios *);
200static void moxa_stop(struct tty_struct *);
201static void moxa_start(struct tty_struct *);
202static void moxa_hangup(struct tty_struct *);
203static int moxa_tiocmget(struct tty_struct *tty);
204static int moxa_tiocmset(struct tty_struct *tty,
205 unsigned int set, unsigned int clear);
206static void moxa_poll(unsigned long);
207static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
208static void moxa_shutdown(struct tty_port *);
209static int moxa_carrier_raised(struct tty_port *);
210static void moxa_dtr_rts(struct tty_port *, int);
211/*
212 * moxa board interface functions:
213 */
214static void MoxaPortEnable(struct moxa_port *);
215static void MoxaPortDisable(struct moxa_port *);
216static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
217static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
218static void MoxaPortLineCtrl(struct moxa_port *, int, int);
219static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
220static int MoxaPortLineStatus(struct moxa_port *);
221static void MoxaPortFlushData(struct moxa_port *, int);
222static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
223static int MoxaPortReadData(struct moxa_port *);
224static int MoxaPortTxQueue(struct moxa_port *);
225static int MoxaPortRxQueue(struct moxa_port *);
226static int MoxaPortTxFree(struct moxa_port *);
227static void MoxaPortTxDisable(struct moxa_port *);
228static void MoxaPortTxEnable(struct moxa_port *);
229static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
230static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
231static void MoxaSetFifo(struct moxa_port *port, int enable);
232
233/*
234 * I/O functions
235 */
236
237static DEFINE_SPINLOCK(moxafunc_lock);
238
239static void moxa_wait_finish(void __iomem *ofsAddr)
240{
241 unsigned long end = jiffies + moxaFuncTout;
242
243 while (readw(ofsAddr + FuncCode) != 0)
244 if (time_after(jiffies, end))
245 return;
246 if (readw(ofsAddr + FuncCode) != 0)
247 printk_ratelimited(KERN_WARNING "moxa function expired\n");
248}
249
250static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
251{
252 unsigned long flags;
253 spin_lock_irqsave(&moxafunc_lock, flags);
254 writew(arg, ofsAddr + FuncArg);
255 writew(cmd, ofsAddr + FuncCode);
256 moxa_wait_finish(ofsAddr);
257 spin_unlock_irqrestore(&moxafunc_lock, flags);
258}
259
260static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
261{
262 unsigned long flags;
263 u16 ret;
264 spin_lock_irqsave(&moxafunc_lock, flags);
265 writew(arg, ofsAddr + FuncArg);
266 writew(cmd, ofsAddr + FuncCode);
267 moxa_wait_finish(ofsAddr);
268 ret = readw(ofsAddr + FuncArg);
269 spin_unlock_irqrestore(&moxafunc_lock, flags);
270 return ret;
271}
272
273static void moxa_low_water_check(void __iomem *ofsAddr)
274{
275 u16 rptr, wptr, mask, len;
276
277 if (readb(ofsAddr + FlagStat) & Xoff_state) {
278 rptr = readw(ofsAddr + RXrptr);
279 wptr = readw(ofsAddr + RXwptr);
280 mask = readw(ofsAddr + RX_mask);
281 len = (wptr - rptr) & mask;
282 if (len <= Low_water)
283 moxafunc(ofsAddr, FC_SendXon, 0);
284 }
285}
286
287/*
288 * TTY operations
289 */
290
291static int moxa_ioctl(struct tty_struct *tty,
292 unsigned int cmd, unsigned long arg)
293{
294 struct moxa_port *ch = tty->driver_data;
295 void __user *argp = (void __user *)arg;
296 int status, ret = 0;
297
298 if (tty->index == MAX_PORTS) {
299 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
300 cmd != MOXA_GETMSTATUS)
301 return -EINVAL;
302 } else if (!ch)
303 return -ENODEV;
304
305 switch (cmd) {
306 case MOXA_GETDATACOUNT:
307 moxaLog.tick = jiffies;
308 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
309 ret = -EFAULT;
310 break;
311 case MOXA_FLUSH_QUEUE:
312 MoxaPortFlushData(ch, arg);
313 break;
314 case MOXA_GET_IOQUEUE: {
315 struct moxaq_str __user *argm = argp;
316 struct moxaq_str tmp;
317 struct moxa_port *p;
318 unsigned int i, j;
319
320 for (i = 0; i < MAX_BOARDS; i++) {
321 p = moxa_boards[i].ports;
322 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
323 memset(&tmp, 0, sizeof(tmp));
324 spin_lock_bh(&moxa_lock);
325 if (moxa_boards[i].ready) {
326 tmp.inq = MoxaPortRxQueue(p);
327 tmp.outq = MoxaPortTxQueue(p);
328 }
329 spin_unlock_bh(&moxa_lock);
330 if (copy_to_user(argm, &tmp, sizeof(tmp)))
331 return -EFAULT;
332 }
333 }
334 break;
335 } case MOXA_GET_OQUEUE:
336 status = MoxaPortTxQueue(ch);
337 ret = put_user(status, (unsigned long __user *)argp);
338 break;
339 case MOXA_GET_IQUEUE:
340 status = MoxaPortRxQueue(ch);
341 ret = put_user(status, (unsigned long __user *)argp);
342 break;
343 case MOXA_GETMSTATUS: {
344 struct mxser_mstatus __user *argm = argp;
345 struct mxser_mstatus tmp;
346 struct moxa_port *p;
347 unsigned int i, j;
348
349 for (i = 0; i < MAX_BOARDS; i++) {
350 p = moxa_boards[i].ports;
351 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
352 struct tty_struct *ttyp;
353 memset(&tmp, 0, sizeof(tmp));
354 spin_lock_bh(&moxa_lock);
355 if (!moxa_boards[i].ready) {
356 spin_unlock_bh(&moxa_lock);
357 goto copy;
358 }
359
360 status = MoxaPortLineStatus(p);
361 spin_unlock_bh(&moxa_lock);
362
363 if (status & 1)
364 tmp.cts = 1;
365 if (status & 2)
366 tmp.dsr = 1;
367 if (status & 4)
368 tmp.dcd = 1;
369
370 ttyp = tty_port_tty_get(&p->port);
371 if (!ttyp)
372 tmp.cflag = p->cflag;
373 else
374 tmp.cflag = ttyp->termios.c_cflag;
375 tty_kref_put(ttyp);
376copy:
377 if (copy_to_user(argm, &tmp, sizeof(tmp)))
378 return -EFAULT;
379 }
380 }
381 break;
382 }
383 case TIOCGSERIAL:
384 mutex_lock(&ch->port.mutex);
385 ret = moxa_get_serial_info(ch, argp);
386 mutex_unlock(&ch->port.mutex);
387 break;
388 case TIOCSSERIAL:
389 mutex_lock(&ch->port.mutex);
390 ret = moxa_set_serial_info(ch, argp);
391 mutex_unlock(&ch->port.mutex);
392 break;
393 default:
394 ret = -ENOIOCTLCMD;
395 }
396 return ret;
397}
398
399static int moxa_break_ctl(struct tty_struct *tty, int state)
400{
401 struct moxa_port *port = tty->driver_data;
402
403 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
404 Magic_code);
405 return 0;
406}
407
408static const struct tty_operations moxa_ops = {
409 .open = moxa_open,
410 .close = moxa_close,
411 .write = moxa_write,
412 .write_room = moxa_write_room,
413 .flush_buffer = moxa_flush_buffer,
414 .chars_in_buffer = moxa_chars_in_buffer,
415 .ioctl = moxa_ioctl,
416 .set_termios = moxa_set_termios,
417 .stop = moxa_stop,
418 .start = moxa_start,
419 .hangup = moxa_hangup,
420 .break_ctl = moxa_break_ctl,
421 .tiocmget = moxa_tiocmget,
422 .tiocmset = moxa_tiocmset,
423};
424
425static const struct tty_port_operations moxa_port_ops = {
426 .carrier_raised = moxa_carrier_raised,
427 .dtr_rts = moxa_dtr_rts,
428 .shutdown = moxa_shutdown,
429};
430
431static struct tty_driver *moxaDriver;
432static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
433
434/*
435 * HW init
436 */
437
438static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
439{
440 switch (brd->boardType) {
441 case MOXA_BOARD_C218_ISA:
442 case MOXA_BOARD_C218_PCI:
443 if (model != 1)
444 goto err;
445 break;
446 case MOXA_BOARD_CP204J:
447 if (model != 3)
448 goto err;
449 break;
450 default:
451 if (model != 2)
452 goto err;
453 break;
454 }
455 return 0;
456err:
457 return -EINVAL;
458}
459
460static int moxa_check_fw(const void *ptr)
461{
462 const __le16 *lptr = ptr;
463
464 if (*lptr != cpu_to_le16(0x7980))
465 return -EINVAL;
466
467 return 0;
468}
469
470static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
471 size_t len)
472{
473 void __iomem *baseAddr = brd->basemem;
474 u16 tmp;
475
476 writeb(HW_reset, baseAddr + Control_reg); /* reset */
477 msleep(10);
478 memset_io(baseAddr, 0, 4096);
479 memcpy_toio(baseAddr, buf, len); /* download BIOS */
480 writeb(0, baseAddr + Control_reg); /* restart */
481
482 msleep(2000);
483
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)
489 goto err;
490 break;
491 case MOXA_BOARD_CP204J:
492 tmp = readw(baseAddr + C218_key);
493 if (tmp != CP204J_KeyCode)
494 goto err;
495 break;
496 default:
497 tmp = readw(baseAddr + C320_key);
498 if (tmp != C320_KeyCode)
499 goto err;
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");
504 return -EIO;
505 }
506 break;
507 }
508
509 return 0;
510err:
511 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
512 return -EIO;
513}
514
515static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
516 size_t len)
517{
518 void __iomem *baseAddr = brd->basemem;
519
520 if (len < 7168) {
521 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
522 return -EINVAL;
523 }
524
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);
530
531 return 0;
532}
533
534static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
535 size_t len)
536{
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;
542 u16 usum, keycode;
543
544 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
545 C218_KeyCode;
546
547 switch (brd->boardType) {
548 case MOXA_BOARD_CP204J:
549 case MOXA_BOARD_C218_ISA:
550 case MOXA_BOARD_C218_PCI:
551 key = C218_key;
552 loadbuf = C218_LoadBuf;
553 loadlen = C218DLoad_len;
554 checksum = C218check_sum;
555 checksum_ok = C218chksum_ok;
556 break;
557 default:
558 key = C320_key;
559 keycode = C320_KeyCode;
560 loadbuf = C320_LoadBuf;
561 loadlen = C320DLoad_len;
562 checksum = C320check_sum;
563 checksum_ok = C320chksum_ok;
564 break;
565 }
566
567 usum = 0;
568 wlen = len >> 1;
569 for (i = 0; i < wlen; i++)
570 usum += le16_to_cpu(uptr[i]);
571 retry = 0;
572 do {
573 wlen = len >> 1;
574 j = 0;
575 while (wlen) {
576 len2 = (wlen > 2048) ? 2048 : wlen;
577 wlen -= len2;
578 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
579 j += len2 << 1;
580
581 writew(len2, baseAddr + loadlen);
582 writew(0, baseAddr + key);
583 for (i = 0; i < 100; i++) {
584 if (readw(baseAddr + key) == keycode)
585 break;
586 msleep(10);
587 }
588 if (readw(baseAddr + key) != keycode)
589 return -EIO;
590 }
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)
596 break;
597 msleep(10);
598 }
599 retry++;
600 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
601 if (readb(baseAddr + checksum_ok) != 1)
602 return -EIO;
603
604 writew(0, baseAddr + key);
605 for (i = 0; i < 600; i++) {
606 if (readw(baseAddr + Magic_no) == Magic_code)
607 break;
608 msleep(10);
609 }
610 if (readw(baseAddr + Magic_no) != Magic_code)
611 return -EIO;
612
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);
618 } else {
619 writew(0x3200, baseAddr + TMS320_PORT1);
620 writew(0x3400, baseAddr + TMS320_PORT2);
621 writew(19999, baseAddr + TMS320_CLOCK);
622 }
623 }
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)
628 break;
629 msleep(10);
630 }
631 if (readw(baseAddr + Magic_no) != Magic_code)
632 return -EIO;
633
634 if (MOXA_IS_320(brd)) {
635 j = readw(baseAddr + Module_cnt);
636 if (j <= 0)
637 return -EIO;
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)
643 break;
644 msleep(10);
645 }
646 if (readw(baseAddr + Magic_no) != Magic_code)
647 return -EIO;
648 }
649 brd->intNdx = baseAddr + IRQindex;
650 brd->intPend = baseAddr + IRQpending;
651 brd->intTable = baseAddr + IRQtable;
652
653 return 0;
654}
655
656static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
657 size_t len)
658{
659 void __iomem *ofsAddr, *baseAddr = brd->basemem;
660 struct moxa_port *port;
661 int retval, i;
662
663 if (len % 2) {
664 printk(KERN_ERR "MOXA: bios length is not even\n");
665 return -EINVAL;
666 }
667
668 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
669 if (retval)
670 return retval;
671
672 switch (brd->boardType) {
673 case MOXA_BOARD_C218_ISA:
674 case MOXA_BOARD_C218_PCI:
675 case MOXA_BOARD_CP204J:
676 port = brd->ports;
677 for (i = 0; i < brd->numPorts; i++, port++) {
678 port->board = brd;
679 port->DCDState = 0;
680 port->tableAddr = baseAddr + Extern_table +
681 Extern_size * i;
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);
687
688 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
689 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
690
691 }
692 break;
693 default:
694 port = brd->ports;
695 for (i = 0; i < brd->numPorts; i++, port++) {
696 port->board = brd;
697 port->DCDState = 0;
698 port->tableAddr = baseAddr + Extern_table +
699 Extern_size * i;
700 ofsAddr = port->tableAddr;
701 switch (brd->numPorts) {
702 case 8:
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);
709
710 break;
711 case 16:
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);
718 break;
719
720 case 24:
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);
727 break;
728 case 32:
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);
736 break;
737 }
738 }
739 break;
740 }
741 return 0;
742}
743
744static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
745{
746 const void *ptr = fw->data;
747 char rsn[64];
748 u16 lens[5];
749 size_t len;
750 unsigned int a, lenp, lencnt;
751 int ret = -EINVAL;
752 struct {
753 __le32 magic; /* 0x34303430 */
754 u8 reserved1[2];
755 u8 type; /* UNIX = 3 */
756 u8 model; /* C218T=1, C320T=2, CP204=3 */
757 u8 reserved2[8];
758 __le16 len[5];
759 } const *hdr = ptr;
760
761 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
762
763 if (fw->size < MOXA_FW_HDRLEN) {
764 strcpy(rsn, "too short (even header won't fit)");
765 goto err;
766 }
767 if (hdr->magic != cpu_to_le32(0x30343034)) {
768 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
769 goto err;
770 }
771 if (hdr->type != 3) {
772 sprintf(rsn, "not for linux, type is %u", hdr->type);
773 goto err;
774 }
775 if (moxa_check_fw_model(brd, hdr->model)) {
776 sprintf(rsn, "not for this card, model is %u", hdr->model);
777 goto err;
778 }
779
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");
790 goto err;
791 }
792 len += lens[a];
793 }
794
795 if (len != fw->size) {
796 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
797 (u32)len);
798 goto err;
799 }
800
801 ptr += MOXA_FW_HDRLEN;
802 lenp = 0; /* bios */
803
804 strcpy(rsn, "read above");
805
806 ret = moxa_load_bios(brd, ptr, lens[lenp]);
807 if (ret)
808 goto err;
809
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 */
813
814 if (hdr->model == 2) {
815 ret = moxa_load_320b(brd, ptr, lens[lenp]);
816 if (ret)
817 goto err;
818 /* skip another tty */
819 ptr += lens[lenp] + lens[lenp + 1];
820 lenp += 2;
821 }
822
823 ret = moxa_load_code(brd, ptr, lens[lenp]);
824 if (ret)
825 goto err;
826
827 return 0;
828err:
829 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
830 return ret;
831}
832
833static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
834{
835 const struct firmware *fw;
836 const char *file;
837 struct moxa_port *p;
838 unsigned int i, first_idx;
839 int ret;
840
841 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
842 GFP_KERNEL);
843 if (brd->ports == NULL) {
844 printk(KERN_ERR "cannot allocate memory for ports\n");
845 ret = -ENOMEM;
846 goto err;
847 }
848
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;
854 }
855
856 switch (brd->boardType) {
857 case MOXA_BOARD_C218_ISA:
858 case MOXA_BOARD_C218_PCI:
859 file = "c218tunx.cod";
860 break;
861 case MOXA_BOARD_CP204J:
862 file = "cp204unx.cod";
863 break;
864 default:
865 file = "c320tunx.cod";
866 break;
867 }
868
869 ret = request_firmware(&fw, file, dev);
870 if (ret) {
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",
874 file);
875 goto err_free;
876 }
877
878 ret = moxa_load_fw(brd, fw);
879
880 release_firmware(fw);
881
882 if (ret)
883 goto err_free;
884
885 spin_lock_bh(&moxa_lock);
886 brd->ready = 1;
887 if (!timer_pending(&moxaTimer))
888 mod_timer(&moxaTimer, jiffies + HZ / 50);
889 spin_unlock_bh(&moxa_lock);
890
891 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
892 for (i = 0; i < brd->numPorts; i++)
893 tty_port_register_device(&brd->ports[i].port, moxaDriver,
894 first_idx + i, dev);
895
896 return 0;
897err_free:
898 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
899 tty_port_destroy(&brd->ports[i].port);
900 kfree(brd->ports);
901err:
902 return ret;
903}
904
905static void moxa_board_deinit(struct moxa_board_conf *brd)
906{
907 unsigned int a, opened, first_idx;
908
909 mutex_lock(&moxa_openlock);
910 spin_lock_bh(&moxa_lock);
911 brd->ready = 0;
912 spin_unlock_bh(&moxa_lock);
913
914 /* pci hot-un-plug support */
915 for (a = 0; a < brd->numPorts; a++)
916 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
917 tty_port_tty_hangup(&brd->ports[a].port, false);
918
919 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
920 tty_port_destroy(&brd->ports[a].port);
921
922 while (1) {
923 opened = 0;
924 for (a = 0; a < brd->numPorts; a++)
925 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
926 opened++;
927 mutex_unlock(&moxa_openlock);
928 if (!opened)
929 break;
930 msleep(50);
931 mutex_lock(&moxa_openlock);
932 }
933
934 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
935 for (a = 0; a < brd->numPorts; a++)
936 tty_unregister_device(moxaDriver, first_idx + a);
937
938 iounmap(brd->basemem);
939 brd->basemem = NULL;
940 kfree(brd->ports);
941}
942
943#ifdef CONFIG_PCI
944static int moxa_pci_probe(struct pci_dev *pdev,
945 const struct pci_device_id *ent)
946{
947 struct moxa_board_conf *board;
948 unsigned int i;
949 int board_type = ent->driver_data;
950 int retval;
951
952 retval = pci_enable_device(pdev);
953 if (retval) {
954 dev_err(&pdev->dev, "can't enable pci device\n");
955 goto err;
956 }
957
958 for (i = 0; i < MAX_BOARDS; i++)
959 if (moxa_boards[i].basemem == NULL)
960 break;
961
962 retval = -ENODEV;
963 if (i >= MAX_BOARDS) {
964 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
965 "found. Board is ignored.\n", MAX_BOARDS);
966 goto err;
967 }
968
969 board = &moxa_boards[i];
970
971 retval = pci_request_region(pdev, 2, "moxa-base");
972 if (retval) {
973 dev_err(&pdev->dev, "can't request pci region 2\n");
974 goto err;
975 }
976
977 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
978 if (board->basemem == NULL) {
979 dev_err(&pdev->dev, "can't remap io space 2\n");
980 retval = -ENOMEM;
981 goto err_reg;
982 }
983
984 board->boardType = board_type;
985 switch (board_type) {
986 case MOXA_BOARD_C218_ISA:
987 case MOXA_BOARD_C218_PCI:
988 board->numPorts = 8;
989 break;
990
991 case MOXA_BOARD_CP204J:
992 board->numPorts = 4;
993 break;
994 default:
995 board->numPorts = 0;
996 break;
997 }
998 board->busType = MOXA_BUS_TYPE_PCI;
999
1000 retval = moxa_init_board(board, &pdev->dev);
1001 if (retval)
1002 goto err_base;
1003
1004 pci_set_drvdata(pdev, board);
1005
1006 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1007 moxa_brdname[board_type - 1], board->numPorts);
1008
1009 return 0;
1010err_base:
1011 iounmap(board->basemem);
1012 board->basemem = NULL;
1013err_reg:
1014 pci_release_region(pdev, 2);
1015err:
1016 return retval;
1017}
1018
1019static void moxa_pci_remove(struct pci_dev *pdev)
1020{
1021 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1022
1023 moxa_board_deinit(brd);
1024
1025 pci_release_region(pdev, 2);
1026}
1027
1028static struct pci_driver moxa_pci_driver = {
1029 .name = "moxa",
1030 .id_table = moxa_pcibrds,
1031 .probe = moxa_pci_probe,
1032 .remove = moxa_pci_remove
1033};
1034#endif /* CONFIG_PCI */
1035
1036static int __init moxa_init(void)
1037{
1038 unsigned int isabrds = 0;
1039 int retval = 0;
1040 struct moxa_board_conf *brd = moxa_boards;
1041 unsigned int i;
1042
1043 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1044 MOXA_VERSION);
1045
1046 tty_port_init(&moxa_service_port);
1047
1048 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1049 TTY_DRIVER_REAL_RAW |
1050 TTY_DRIVER_DYNAMIC_DEV);
1051 if (IS_ERR(moxaDriver))
1052 return PTR_ERR(moxaDriver);
1053
1054 moxaDriver->name = "ttyMX";
1055 moxaDriver->major = ttymajor;
1056 moxaDriver->minor_start = 0;
1057 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1058 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1059 moxaDriver->init_termios = tty_std_termios;
1060 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1061 moxaDriver->init_termios.c_ispeed = 9600;
1062 moxaDriver->init_termios.c_ospeed = 9600;
1063 tty_set_operations(moxaDriver, &moxa_ops);
1064 /* Having one more port only for ioctls is ugly */
1065 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1066
1067 if (tty_register_driver(moxaDriver)) {
1068 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1069 put_tty_driver(moxaDriver);
1070 return -1;
1071 }
1072
1073 /* Find the boards defined from module args. */
1074
1075 for (i = 0; i < MAX_BOARDS; i++) {
1076 if (!baseaddr[i])
1077 break;
1078 if (type[i] == MOXA_BOARD_C218_ISA ||
1079 type[i] == MOXA_BOARD_C320_ISA) {
1080 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1081 isabrds + 1, moxa_brdname[type[i] - 1],
1082 baseaddr[i]);
1083 brd->boardType = type[i];
1084 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1085 numports[i];
1086 brd->busType = MOXA_BUS_TYPE_ISA;
1087 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1088 if (!brd->basemem) {
1089 printk(KERN_ERR "MOXA: can't remap %lx\n",
1090 baseaddr[i]);
1091 continue;
1092 }
1093 if (moxa_init_board(brd, NULL)) {
1094 iounmap(brd->basemem);
1095 brd->basemem = NULL;
1096 continue;
1097 }
1098
1099 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1100 "ready (%u ports, firmware loaded)\n",
1101 baseaddr[i], brd->numPorts);
1102
1103 brd++;
1104 isabrds++;
1105 }
1106 }
1107
1108#ifdef CONFIG_PCI
1109 retval = pci_register_driver(&moxa_pci_driver);
1110 if (retval) {
1111 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1112 if (isabrds)
1113 retval = 0;
1114 }
1115#endif
1116
1117 return retval;
1118}
1119
1120static void __exit moxa_exit(void)
1121{
1122 unsigned int i;
1123
1124#ifdef CONFIG_PCI
1125 pci_unregister_driver(&moxa_pci_driver);
1126#endif
1127
1128 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1129 if (moxa_boards[i].ready)
1130 moxa_board_deinit(&moxa_boards[i]);
1131
1132 del_timer_sync(&moxaTimer);
1133
1134 if (tty_unregister_driver(moxaDriver))
1135 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1136 "serial driver\n");
1137 put_tty_driver(moxaDriver);
1138}
1139
1140module_init(moxa_init);
1141module_exit(moxa_exit);
1142
1143static void moxa_shutdown(struct tty_port *port)
1144{
1145 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1146 MoxaPortDisable(ch);
1147 MoxaPortFlushData(ch, 2);
1148}
1149
1150static int moxa_carrier_raised(struct tty_port *port)
1151{
1152 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1153 int dcd;
1154
1155 spin_lock_irq(&port->lock);
1156 dcd = ch->DCDState;
1157 spin_unlock_irq(&port->lock);
1158 return dcd;
1159}
1160
1161static void moxa_dtr_rts(struct tty_port *port, int onoff)
1162{
1163 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1164 MoxaPortLineCtrl(ch, onoff, onoff);
1165}
1166
1167
1168static int moxa_open(struct tty_struct *tty, struct file *filp)
1169{
1170 struct moxa_board_conf *brd;
1171 struct moxa_port *ch;
1172 int port;
1173
1174 port = tty->index;
1175 if (port == MAX_PORTS) {
1176 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1177 }
1178 if (mutex_lock_interruptible(&moxa_openlock))
1179 return -ERESTARTSYS;
1180 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1181 if (!brd->ready) {
1182 mutex_unlock(&moxa_openlock);
1183 return -ENODEV;
1184 }
1185
1186 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1187 mutex_unlock(&moxa_openlock);
1188 return -ENODEV;
1189 }
1190
1191 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1192 ch->port.count++;
1193 tty->driver_data = ch;
1194 tty_port_tty_set(&ch->port, tty);
1195 mutex_lock(&ch->port.mutex);
1196 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1197 ch->statusflags = 0;
1198 moxa_set_tty_param(tty, &tty->termios);
1199 MoxaPortLineCtrl(ch, 1, 1);
1200 MoxaPortEnable(ch);
1201 MoxaSetFifo(ch, ch->type == PORT_16550A);
1202 ch->port.flags |= ASYNC_INITIALIZED;
1203 }
1204 mutex_unlock(&ch->port.mutex);
1205 mutex_unlock(&moxa_openlock);
1206
1207 return tty_port_block_til_ready(&ch->port, tty, filp);
1208}
1209
1210static void moxa_close(struct tty_struct *tty, struct file *filp)
1211{
1212 struct moxa_port *ch = tty->driver_data;
1213 ch->cflag = tty->termios.c_cflag;
1214 tty_port_close(&ch->port, tty, filp);
1215}
1216
1217static int moxa_write(struct tty_struct *tty,
1218 const unsigned char *buf, int count)
1219{
1220 struct moxa_port *ch = tty->driver_data;
1221 unsigned long flags;
1222 int len;
1223
1224 if (ch == NULL)
1225 return 0;
1226
1227 spin_lock_irqsave(&moxa_lock, flags);
1228 len = MoxaPortWriteData(tty, buf, count);
1229 spin_unlock_irqrestore(&moxa_lock, flags);
1230
1231 set_bit(LOWWAIT, &ch->statusflags);
1232 return len;
1233}
1234
1235static int moxa_write_room(struct tty_struct *tty)
1236{
1237 struct moxa_port *ch;
1238
1239 if (tty->stopped)
1240 return 0;
1241 ch = tty->driver_data;
1242 if (ch == NULL)
1243 return 0;
1244 return MoxaPortTxFree(ch);
1245}
1246
1247static void moxa_flush_buffer(struct tty_struct *tty)
1248{
1249 struct moxa_port *ch = tty->driver_data;
1250
1251 if (ch == NULL)
1252 return;
1253 MoxaPortFlushData(ch, 1);
1254 tty_wakeup(tty);
1255}
1256
1257static int moxa_chars_in_buffer(struct tty_struct *tty)
1258{
1259 struct moxa_port *ch = tty->driver_data;
1260 int chars;
1261
1262 chars = MoxaPortTxQueue(ch);
1263 if (chars)
1264 /*
1265 * Make it possible to wakeup anything waiting for output
1266 * in tty_ioctl.c, etc.
1267 */
1268 set_bit(EMPTYWAIT, &ch->statusflags);
1269 return chars;
1270}
1271
1272static int moxa_tiocmget(struct tty_struct *tty)
1273{
1274 struct moxa_port *ch = tty->driver_data;
1275 int flag = 0, dtr, rts;
1276
1277 MoxaPortGetLineOut(ch, &dtr, &rts);
1278 if (dtr)
1279 flag |= TIOCM_DTR;
1280 if (rts)
1281 flag |= TIOCM_RTS;
1282 dtr = MoxaPortLineStatus(ch);
1283 if (dtr & 1)
1284 flag |= TIOCM_CTS;
1285 if (dtr & 2)
1286 flag |= TIOCM_DSR;
1287 if (dtr & 4)
1288 flag |= TIOCM_CD;
1289 return flag;
1290}
1291
1292static int moxa_tiocmset(struct tty_struct *tty,
1293 unsigned int set, unsigned int clear)
1294{
1295 struct moxa_port *ch;
1296 int dtr, rts;
1297
1298 mutex_lock(&moxa_openlock);
1299 ch = tty->driver_data;
1300 if (!ch) {
1301 mutex_unlock(&moxa_openlock);
1302 return -EINVAL;
1303 }
1304
1305 MoxaPortGetLineOut(ch, &dtr, &rts);
1306 if (set & TIOCM_RTS)
1307 rts = 1;
1308 if (set & TIOCM_DTR)
1309 dtr = 1;
1310 if (clear & TIOCM_RTS)
1311 rts = 0;
1312 if (clear & TIOCM_DTR)
1313 dtr = 0;
1314 MoxaPortLineCtrl(ch, dtr, rts);
1315 mutex_unlock(&moxa_openlock);
1316 return 0;
1317}
1318
1319static void moxa_set_termios(struct tty_struct *tty,
1320 struct ktermios *old_termios)
1321{
1322 struct moxa_port *ch = tty->driver_data;
1323
1324 if (ch == NULL)
1325 return;
1326 moxa_set_tty_param(tty, old_termios);
1327 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1328 wake_up_interruptible(&ch->port.open_wait);
1329}
1330
1331static void moxa_stop(struct tty_struct *tty)
1332{
1333 struct moxa_port *ch = tty->driver_data;
1334
1335 if (ch == NULL)
1336 return;
1337 MoxaPortTxDisable(ch);
1338 set_bit(TXSTOPPED, &ch->statusflags);
1339}
1340
1341
1342static void moxa_start(struct tty_struct *tty)
1343{
1344 struct moxa_port *ch = tty->driver_data;
1345
1346 if (ch == NULL)
1347 return;
1348
1349 if (!test_bit(TXSTOPPED, &ch->statusflags))
1350 return;
1351
1352 MoxaPortTxEnable(ch);
1353 clear_bit(TXSTOPPED, &ch->statusflags);
1354}
1355
1356static void moxa_hangup(struct tty_struct *tty)
1357{
1358 struct moxa_port *ch = tty->driver_data;
1359 tty_port_hangup(&ch->port);
1360}
1361
1362static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1363{
1364 unsigned long flags;
1365 dcd = !!dcd;
1366
1367 spin_lock_irqsave(&p->port.lock, flags);
1368 if (dcd != p->DCDState) {
1369 p->DCDState = dcd;
1370 spin_unlock_irqrestore(&p->port.lock, flags);
1371 if (!dcd)
1372 tty_port_tty_hangup(&p->port, true);
1373 }
1374 else
1375 spin_unlock_irqrestore(&p->port.lock, flags);
1376}
1377
1378static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1379 u16 __iomem *ip)
1380{
1381 struct tty_struct *tty = tty_port_tty_get(&p->port);
1382 void __iomem *ofsAddr;
1383 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1384 u16 intr;
1385
1386 if (tty) {
1387 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1388 MoxaPortTxQueue(p) == 0) {
1389 clear_bit(EMPTYWAIT, &p->statusflags);
1390 tty_wakeup(tty);
1391 }
1392 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1393 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1394 clear_bit(LOWWAIT, &p->statusflags);
1395 tty_wakeup(tty);
1396 }
1397
1398 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
1399 MoxaPortRxQueue(p) > 0) { /* RX */
1400 MoxaPortReadData(p);
1401 tty_schedule_flip(&p->port);
1402 }
1403 } else {
1404 clear_bit(EMPTYWAIT, &p->statusflags);
1405 MoxaPortFlushData(p, 0); /* flush RX */
1406 }
1407
1408 if (!handle) /* nothing else to do */
1409 goto put;
1410
1411 intr = readw(ip); /* port irq status */
1412 if (intr == 0)
1413 goto put;
1414
1415 writew(0, ip); /* ACK port */
1416 ofsAddr = p->tableAddr;
1417 if (intr & IntrTx) /* disable tx intr */
1418 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1419 ofsAddr + HostStat);
1420
1421 if (!inited)
1422 goto put;
1423
1424 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1425 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
1426 tty_schedule_flip(&p->port);
1427 }
1428
1429 if (intr & IntrLine)
1430 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1431put:
1432 tty_kref_put(tty);
1433
1434 return 0;
1435}
1436
1437static void moxa_poll(unsigned long ignored)
1438{
1439 struct moxa_board_conf *brd;
1440 u16 __iomem *ip;
1441 unsigned int card, port, served = 0;
1442
1443 spin_lock(&moxa_lock);
1444 for (card = 0; card < MAX_BOARDS; card++) {
1445 brd = &moxa_boards[card];
1446 if (!brd->ready)
1447 continue;
1448
1449 served++;
1450
1451 ip = NULL;
1452 if (readb(brd->intPend) == 0xff)
1453 ip = brd->intTable + readb(brd->intNdx);
1454
1455 for (port = 0; port < brd->numPorts; port++)
1456 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1457
1458 if (ip)
1459 writeb(0, brd->intPend); /* ACK */
1460
1461 if (moxaLowWaterChk) {
1462 struct moxa_port *p = brd->ports;
1463 for (port = 0; port < brd->numPorts; port++, p++)
1464 if (p->lowChkFlag) {
1465 p->lowChkFlag = 0;
1466 moxa_low_water_check(p->tableAddr);
1467 }
1468 }
1469 }
1470 moxaLowWaterChk = 0;
1471
1472 if (served)
1473 mod_timer(&moxaTimer, jiffies + HZ / 50);
1474 spin_unlock(&moxa_lock);
1475}
1476
1477/******************************************************************************/
1478
1479static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1480{
1481 register struct ktermios *ts = &tty->termios;
1482 struct moxa_port *ch = tty->driver_data;
1483 int rts, cts, txflow, rxflow, xany, baud;
1484
1485 rts = cts = txflow = rxflow = xany = 0;
1486 if (ts->c_cflag & CRTSCTS)
1487 rts = cts = 1;
1488 if (ts->c_iflag & IXON)
1489 txflow = 1;
1490 if (ts->c_iflag & IXOFF)
1491 rxflow = 1;
1492 if (ts->c_iflag & IXANY)
1493 xany = 1;
1494
1495 /* Clear the features we don't support */
1496 ts->c_cflag &= ~CMSPAR;
1497 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1498 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1499 if (baud == -1)
1500 baud = tty_termios_baud_rate(old_termios);
1501 /* Not put the baud rate into the termios data */
1502 tty_encode_baud_rate(tty, baud, baud);
1503}
1504
1505/*****************************************************************************
1506 * Driver level functions: *
1507 *****************************************************************************/
1508
1509static void MoxaPortFlushData(struct moxa_port *port, int mode)
1510{
1511 void __iomem *ofsAddr;
1512 if (mode < 0 || mode > 2)
1513 return;
1514 ofsAddr = port->tableAddr;
1515 moxafunc(ofsAddr, FC_FlushQueue, mode);
1516 if (mode != 1) {
1517 port->lowChkFlag = 0;
1518 moxa_low_water_check(ofsAddr);
1519 }
1520}
1521
1522/*
1523 * Moxa Port Number Description:
1524 *
1525 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1526 * the port number using in MOXA driver functions will be 0 to 31 for
1527 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1528 * to 127 for fourth. For example, if you setup three MOXA boards,
1529 * first board is C218, second board is C320-16 and third board is
1530 * C320-32. The port number of first board (C218 - 8 ports) is from
1531 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1532 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1533 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1534 * 127 will be invalid.
1535 *
1536 *
1537 * Moxa Functions Description:
1538 *
1539 * Function 1: Driver initialization routine, this routine must be
1540 * called when initialized driver.
1541 * Syntax:
1542 * void MoxaDriverInit();
1543 *
1544 *
1545 * Function 2: Moxa driver private IOCTL command processing.
1546 * Syntax:
1547 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1548 *
1549 * unsigned int cmd : IOCTL command
1550 * unsigned long arg : IOCTL argument
1551 * int port : port number (0 - 127)
1552 *
1553 * return: 0 (OK)
1554 * -EINVAL
1555 * -ENOIOCTLCMD
1556 *
1557 *
1558 * Function 6: Enable this port to start Tx/Rx data.
1559 * Syntax:
1560 * void MoxaPortEnable(int port);
1561 * int port : port number (0 - 127)
1562 *
1563 *
1564 * Function 7: Disable this port
1565 * Syntax:
1566 * void MoxaPortDisable(int port);
1567 * int port : port number (0 - 127)
1568 *
1569 *
1570 * Function 10: Setting baud rate of this port.
1571 * Syntax:
1572 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1573 * int port : port number (0 - 127)
1574 * long baud : baud rate (50 - 115200)
1575 *
1576 * return: 0 : this port is invalid or baud < 50
1577 * 50 - 115200 : the real baud rate set to the port, if
1578 * the argument baud is large than maximun
1579 * available baud rate, the real setting
1580 * baud rate will be the maximun baud rate.
1581 *
1582 *
1583 * Function 12: Configure the port.
1584 * Syntax:
1585 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1586 * int port : port number (0 - 127)
1587 * struct ktermios * termio : termio structure pointer
1588 * speed_t baud : baud rate
1589 *
1590 * return: -1 : this port is invalid or termio == NULL
1591 * 0 : setting O.K.
1592 *
1593 *
1594 * Function 13: Get the DTR/RTS state of this port.
1595 * Syntax:
1596 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1597 * int port : port number (0 - 127)
1598 * int * dtrState : pointer to INT to receive the current DTR
1599 * state. (if NULL, this function will not
1600 * write to this address)
1601 * int * rtsState : pointer to INT to receive the current RTS
1602 * state. (if NULL, this function will not
1603 * write to this address)
1604 *
1605 * return: -1 : this port is invalid
1606 * 0 : O.K.
1607 *
1608 *
1609 * Function 14: Setting the DTR/RTS output state of this port.
1610 * Syntax:
1611 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1612 * int port : port number (0 - 127)
1613 * int dtrState : DTR output state (0: off, 1: on)
1614 * int rtsState : RTS output state (0: off, 1: on)
1615 *
1616 *
1617 * Function 15: Setting the flow control of this port.
1618 * Syntax:
1619 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1620 * int txFlow,int xany);
1621 * int port : port number (0 - 127)
1622 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1623 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1624 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1625 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1626 * int xany : S/W XANY flow control (0: no, 1: yes)
1627 *
1628 *
1629 * Function 16: Get ths line status of this port
1630 * Syntax:
1631 * int MoxaPortLineStatus(int port);
1632 * int port : port number (0 - 127)
1633 *
1634 * return: Bit 0 - CTS state (0: off, 1: on)
1635 * Bit 1 - DSR state (0: off, 1: on)
1636 * Bit 2 - DCD state (0: off, 1: on)
1637 *
1638 *
1639 * Function 19: Flush the Rx/Tx buffer data of this port.
1640 * Syntax:
1641 * void MoxaPortFlushData(int port, int mode);
1642 * int port : port number (0 - 127)
1643 * int mode
1644 * 0 : flush the Rx buffer
1645 * 1 : flush the Tx buffer
1646 * 2 : flush the Rx and Tx buffer
1647 *
1648 *
1649 * Function 20: Write data.
1650 * Syntax:
1651 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1652 * int port : port number (0 - 127)
1653 * unsigned char * buffer : pointer to write data buffer.
1654 * int length : write data length
1655 *
1656 * return: 0 - length : real write data length
1657 *
1658 *
1659 * Function 21: Read data.
1660 * Syntax:
1661 * int MoxaPortReadData(int port, struct tty_struct *tty);
1662 * int port : port number (0 - 127)
1663 * struct tty_struct *tty : tty for data
1664 *
1665 * return: 0 - length : real read data length
1666 *
1667 *
1668 * Function 24: Get the Tx buffer current queued data bytes
1669 * Syntax:
1670 * int MoxaPortTxQueue(int port);
1671 * int port : port number (0 - 127)
1672 *
1673 * return: .. : Tx buffer current queued data bytes
1674 *
1675 *
1676 * Function 25: Get the Tx buffer current free space
1677 * Syntax:
1678 * int MoxaPortTxFree(int port);
1679 * int port : port number (0 - 127)
1680 *
1681 * return: .. : Tx buffer current free space
1682 *
1683 *
1684 * Function 26: Get the Rx buffer current queued data bytes
1685 * Syntax:
1686 * int MoxaPortRxQueue(int port);
1687 * int port : port number (0 - 127)
1688 *
1689 * return: .. : Rx buffer current queued data bytes
1690 *
1691 *
1692 * Function 28: Disable port data transmission.
1693 * Syntax:
1694 * void MoxaPortTxDisable(int port);
1695 * int port : port number (0 - 127)
1696 *
1697 *
1698 * Function 29: Enable port data transmission.
1699 * Syntax:
1700 * void MoxaPortTxEnable(int port);
1701 * int port : port number (0 - 127)
1702 *
1703 *
1704 * Function 31: Get the received BREAK signal count and reset it.
1705 * Syntax:
1706 * int MoxaPortResetBrkCnt(int port);
1707 * int port : port number (0 - 127)
1708 *
1709 * return: 0 - .. : BREAK signal count
1710 *
1711 *
1712 */
1713
1714static void MoxaPortEnable(struct moxa_port *port)
1715{
1716 void __iomem *ofsAddr;
1717 u16 lowwater = 512;
1718
1719 ofsAddr = port->tableAddr;
1720 writew(lowwater, ofsAddr + Low_water);
1721 if (MOXA_IS_320(port->board))
1722 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1723 else
1724 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1725 ofsAddr + HostStat);
1726
1727 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1728 moxafunc(ofsAddr, FC_FlushQueue, 2);
1729
1730 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1731 MoxaPortLineStatus(port);
1732}
1733
1734static void MoxaPortDisable(struct moxa_port *port)
1735{
1736 void __iomem *ofsAddr = port->tableAddr;
1737
1738 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1739 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1740 writew(0, ofsAddr + HostStat);
1741 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1742}
1743
1744static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1745{
1746 void __iomem *ofsAddr = port->tableAddr;
1747 unsigned int clock, val;
1748 speed_t max;
1749
1750 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1751 if (baud < 50)
1752 return 0;
1753 if (baud > max)
1754 baud = max;
1755 clock = 921600;
1756 val = clock / baud;
1757 moxafunc(ofsAddr, FC_SetBaud, val);
1758 baud = clock / val;
1759 return baud;
1760}
1761
1762static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1763 speed_t baud)
1764{
1765 void __iomem *ofsAddr;
1766 tcflag_t mode = 0;
1767
1768 ofsAddr = port->tableAddr;
1769
1770 mode = termio->c_cflag & CSIZE;
1771 if (mode == CS5)
1772 mode = MX_CS5;
1773 else if (mode == CS6)
1774 mode = MX_CS6;
1775 else if (mode == CS7)
1776 mode = MX_CS7;
1777 else if (mode == CS8)
1778 mode = MX_CS8;
1779
1780 if (termio->c_cflag & CSTOPB) {
1781 if (mode == MX_CS5)
1782 mode |= MX_STOP15;
1783 else
1784 mode |= MX_STOP2;
1785 } else
1786 mode |= MX_STOP1;
1787
1788 if (termio->c_cflag & PARENB) {
1789 if (termio->c_cflag & PARODD)
1790 mode |= MX_PARODD;
1791 else
1792 mode |= MX_PAREVEN;
1793 } else
1794 mode |= MX_PARNONE;
1795
1796 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1797
1798 if (MOXA_IS_320(port->board) && baud >= 921600)
1799 return -1;
1800
1801 baud = MoxaPortSetBaud(port, baud);
1802
1803 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1804 spin_lock_irq(&moxafunc_lock);
1805 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1806 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1807 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1808 moxa_wait_finish(ofsAddr);
1809 spin_unlock_irq(&moxafunc_lock);
1810
1811 }
1812 return baud;
1813}
1814
1815static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1816 int *rtsState)
1817{
1818 if (dtrState)
1819 *dtrState = !!(port->lineCtrl & DTR_ON);
1820 if (rtsState)
1821 *rtsState = !!(port->lineCtrl & RTS_ON);
1822
1823 return 0;
1824}
1825
1826static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1827{
1828 u8 mode = 0;
1829
1830 if (dtr)
1831 mode |= DTR_ON;
1832 if (rts)
1833 mode |= RTS_ON;
1834 port->lineCtrl = mode;
1835 moxafunc(port->tableAddr, FC_LineControl, mode);
1836}
1837
1838static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1839 int txflow, int rxflow, int txany)
1840{
1841 int mode = 0;
1842
1843 if (rts)
1844 mode |= RTS_FlowCtl;
1845 if (cts)
1846 mode |= CTS_FlowCtl;
1847 if (txflow)
1848 mode |= Tx_FlowCtl;
1849 if (rxflow)
1850 mode |= Rx_FlowCtl;
1851 if (txany)
1852 mode |= IXM_IXANY;
1853 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1854}
1855
1856static int MoxaPortLineStatus(struct moxa_port *port)
1857{
1858 void __iomem *ofsAddr;
1859 int val;
1860
1861 ofsAddr = port->tableAddr;
1862 if (MOXA_IS_320(port->board))
1863 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1864 else
1865 val = readw(ofsAddr + FlagStat) >> 4;
1866 val &= 0x0B;
1867 if (val & 8)
1868 val |= 4;
1869 moxa_new_dcdstate(port, val & 8);
1870 val &= 7;
1871 return val;
1872}
1873
1874static int MoxaPortWriteData(struct tty_struct *tty,
1875 const unsigned char *buffer, int len)
1876{
1877 struct moxa_port *port = tty->driver_data;
1878 void __iomem *baseAddr, *ofsAddr, *ofs;
1879 unsigned int c, total;
1880 u16 head, tail, tx_mask, spage, epage;
1881 u16 pageno, pageofs, bufhead;
1882
1883 ofsAddr = port->tableAddr;
1884 baseAddr = port->board->basemem;
1885 tx_mask = readw(ofsAddr + TX_mask);
1886 spage = readw(ofsAddr + Page_txb);
1887 epage = readw(ofsAddr + EndPage_txb);
1888 tail = readw(ofsAddr + TXwptr);
1889 head = readw(ofsAddr + TXrptr);
1890 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1891 if (c > len)
1892 c = len;
1893 moxaLog.txcnt[port->port.tty->index] += c;
1894 total = c;
1895 if (spage == epage) {
1896 bufhead = readw(ofsAddr + Ofs_txb);
1897 writew(spage, baseAddr + Control_reg);
1898 while (c > 0) {
1899 if (head > tail)
1900 len = head - tail - 1;
1901 else
1902 len = tx_mask + 1 - tail;
1903 len = (c > len) ? len : c;
1904 ofs = baseAddr + DynPage_addr + bufhead + tail;
1905 memcpy_toio(ofs, buffer, len);
1906 buffer += len;
1907 tail = (tail + len) & tx_mask;
1908 c -= len;
1909 }
1910 } else {
1911 pageno = spage + (tail >> 13);
1912 pageofs = tail & Page_mask;
1913 while (c > 0) {
1914 len = Page_size - pageofs;
1915 if (len > c)
1916 len = c;
1917 writeb(pageno, baseAddr + Control_reg);
1918 ofs = baseAddr + DynPage_addr + pageofs;
1919 memcpy_toio(ofs, buffer, len);
1920 buffer += len;
1921 if (++pageno == epage)
1922 pageno = spage;
1923 pageofs = 0;
1924 c -= len;
1925 }
1926 tail = (tail + total) & tx_mask;
1927 }
1928 writew(tail, ofsAddr + TXwptr);
1929 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1930 return total;
1931}
1932
1933static int MoxaPortReadData(struct moxa_port *port)
1934{
1935 struct tty_struct *tty = port->port.tty;
1936 unsigned char *dst;
1937 void __iomem *baseAddr, *ofsAddr, *ofs;
1938 unsigned int count, len, total;
1939 u16 tail, rx_mask, spage, epage;
1940 u16 pageno, pageofs, bufhead, head;
1941
1942 ofsAddr = port->tableAddr;
1943 baseAddr = port->board->basemem;
1944 head = readw(ofsAddr + RXrptr);
1945 tail = readw(ofsAddr + RXwptr);
1946 rx_mask = readw(ofsAddr + RX_mask);
1947 spage = readw(ofsAddr + Page_rxb);
1948 epage = readw(ofsAddr + EndPage_rxb);
1949 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1950 if (count == 0)
1951 return 0;
1952
1953 total = count;
1954 moxaLog.rxcnt[tty->index] += total;
1955 if (spage == epage) {
1956 bufhead = readw(ofsAddr + Ofs_rxb);
1957 writew(spage, baseAddr + Control_reg);
1958 while (count > 0) {
1959 ofs = baseAddr + DynPage_addr + bufhead + head;
1960 len = (tail >= head) ? (tail - head) :
1961 (rx_mask + 1 - head);
1962 len = tty_prepare_flip_string(&port->port, &dst,
1963 min(len, count));
1964 memcpy_fromio(dst, ofs, len);
1965 head = (head + len) & rx_mask;
1966 count -= len;
1967 }
1968 } else {
1969 pageno = spage + (head >> 13);
1970 pageofs = head & Page_mask;
1971 while (count > 0) {
1972 writew(pageno, baseAddr + Control_reg);
1973 ofs = baseAddr + DynPage_addr + pageofs;
1974 len = tty_prepare_flip_string(&port->port, &dst,
1975 min(Page_size - pageofs, count));
1976 memcpy_fromio(dst, ofs, len);
1977
1978 count -= len;
1979 pageofs = (pageofs + len) & Page_mask;
1980 if (pageofs == 0 && ++pageno == epage)
1981 pageno = spage;
1982 }
1983 head = (head + total) & rx_mask;
1984 }
1985 writew(head, ofsAddr + RXrptr);
1986 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1987 moxaLowWaterChk = 1;
1988 port->lowChkFlag = 1;
1989 }
1990 return total;
1991}
1992
1993
1994static int MoxaPortTxQueue(struct moxa_port *port)
1995{
1996 void __iomem *ofsAddr = port->tableAddr;
1997 u16 rptr, wptr, mask;
1998
1999 rptr = readw(ofsAddr + TXrptr);
2000 wptr = readw(ofsAddr + TXwptr);
2001 mask = readw(ofsAddr + TX_mask);
2002 return (wptr - rptr) & mask;
2003}
2004
2005static int MoxaPortTxFree(struct moxa_port *port)
2006{
2007 void __iomem *ofsAddr = port->tableAddr;
2008 u16 rptr, wptr, mask;
2009
2010 rptr = readw(ofsAddr + TXrptr);
2011 wptr = readw(ofsAddr + TXwptr);
2012 mask = readw(ofsAddr + TX_mask);
2013 return mask - ((wptr - rptr) & mask);
2014}
2015
2016static int MoxaPortRxQueue(struct moxa_port *port)
2017{
2018 void __iomem *ofsAddr = port->tableAddr;
2019 u16 rptr, wptr, mask;
2020
2021 rptr = readw(ofsAddr + RXrptr);
2022 wptr = readw(ofsAddr + RXwptr);
2023 mask = readw(ofsAddr + RX_mask);
2024 return (wptr - rptr) & mask;
2025}
2026
2027static void MoxaPortTxDisable(struct moxa_port *port)
2028{
2029 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2030}
2031
2032static void MoxaPortTxEnable(struct moxa_port *port)
2033{
2034 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2035}
2036
2037static int moxa_get_serial_info(struct moxa_port *info,
2038 struct serial_struct __user *retinfo)
2039{
2040 struct serial_struct tmp = {
2041 .type = info->type,
2042 .line = info->port.tty->index,
2043 .flags = info->port.flags,
2044 .baud_base = 921600,
2045 .close_delay = info->port.close_delay
2046 };
2047 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2048}
2049
2050
2051static int moxa_set_serial_info(struct moxa_port *info,
2052 struct serial_struct __user *new_info)
2053{
2054 struct serial_struct new_serial;
2055
2056 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2057 return -EFAULT;
2058
2059 if (new_serial.irq != 0 || new_serial.port != 0 ||
2060 new_serial.custom_divisor != 0 ||
2061 new_serial.baud_base != 921600)
2062 return -EPERM;
2063
2064 if (!capable(CAP_SYS_ADMIN)) {
2065 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2066 (info->port.flags & ~ASYNC_USR_MASK)))
2067 return -EPERM;
2068 } else
2069 info->port.close_delay = new_serial.close_delay * HZ / 100;
2070
2071 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2072 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2073
2074 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2075
2076 info->type = new_serial.type;
2077 return 0;
2078}
2079
2080
2081
2082/*****************************************************************************
2083 * Static local functions: *
2084 *****************************************************************************/
2085
2086static void MoxaSetFifo(struct moxa_port *port, int enable)
2087{
2088 void __iomem *ofsAddr = port->tableAddr;
2089
2090 if (!enable) {
2091 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2092 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2093 } else {
2094 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2095 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2096 }
2097}