Root/
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 | |
73 | enum { |
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 | |
81 | static 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 |
91 | static struct pci_device_id moxa_pcibrds[] = { |
92 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), |
93 | .driver_data = MOXA_BOARD_C218_PCI }, |
94 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), |
95 | .driver_data = MOXA_BOARD_C320_PCI }, |
96 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), |
97 | .driver_data = MOXA_BOARD_CP204J }, |
98 | { 0 } |
99 | }; |
100 | MODULE_DEVICE_TABLE(pci, moxa_pcibrds); |
101 | #endif /* CONFIG_PCI */ |
102 | |
103 | struct moxa_port; |
104 | |
105 | static 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 | |
120 | struct mxser_mstatus { |
121 | tcflag_t cflag; |
122 | int cts; |
123 | int dsr; |
124 | int ri; |
125 | int dcd; |
126 | }; |
127 | |
128 | struct moxaq_str { |
129 | int inq; |
130 | int outq; |
131 | }; |
132 | |
133 | struct 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 | |
147 | struct 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 | |
162 | static int ttymajor = MOXAMAJOR; |
163 | static struct mon_str moxaLog; |
164 | static unsigned int moxaFuncTout = HZ / 2; |
165 | static unsigned int moxaLowWaterChk; |
166 | static DEFINE_MUTEX(moxa_openlock); |
167 | static DEFINE_SPINLOCK(moxa_lock); |
168 | |
169 | static unsigned long baseaddr[MAX_BOARDS]; |
170 | static unsigned int type[MAX_BOARDS]; |
171 | static unsigned int numports[MAX_BOARDS]; |
172 | static struct tty_port moxa_service_port; |
173 | |
174 | MODULE_AUTHOR("William Chen"); |
175 | MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); |
176 | MODULE_LICENSE("GPL"); |
177 | MODULE_FIRMWARE("c218tunx.cod"); |
178 | MODULE_FIRMWARE("cp204unx.cod"); |
179 | MODULE_FIRMWARE("c320tunx.cod"); |
180 | |
181 | module_param_array(type, uint, NULL, 0); |
182 | MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); |
183 | module_param_array(baseaddr, ulong, NULL, 0); |
184 | MODULE_PARM_DESC(baseaddr, "base address"); |
185 | module_param_array(numports, uint, NULL, 0); |
186 | MODULE_PARM_DESC(numports, "numports (ignored for C218)"); |
187 | |
188 | module_param(ttymajor, int, 0); |
189 | |
190 | /* |
191 | * static functions: |
192 | */ |
193 | static int moxa_open(struct tty_struct *, struct file *); |
194 | static void moxa_close(struct tty_struct *, struct file *); |
195 | static int moxa_write(struct tty_struct *, const unsigned char *, int); |
196 | static int moxa_write_room(struct tty_struct *); |
197 | static void moxa_flush_buffer(struct tty_struct *); |
198 | static int moxa_chars_in_buffer(struct tty_struct *); |
199 | static void moxa_set_termios(struct tty_struct *, struct ktermios *); |
200 | static void moxa_stop(struct tty_struct *); |
201 | static void moxa_start(struct tty_struct *); |
202 | static void moxa_hangup(struct tty_struct *); |
203 | static int moxa_tiocmget(struct tty_struct *tty); |
204 | static int moxa_tiocmset(struct tty_struct *tty, |
205 | unsigned int set, unsigned int clear); |
206 | static void moxa_poll(unsigned long); |
207 | static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); |
208 | static void moxa_shutdown(struct tty_port *); |
209 | static int moxa_carrier_raised(struct tty_port *); |
210 | static void moxa_dtr_rts(struct tty_port *, int); |
211 | /* |
212 | * moxa board interface functions: |
213 | */ |
214 | static void MoxaPortEnable(struct moxa_port *); |
215 | static void MoxaPortDisable(struct moxa_port *); |
216 | static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); |
217 | static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); |
218 | static void MoxaPortLineCtrl(struct moxa_port *, int, int); |
219 | static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); |
220 | static int MoxaPortLineStatus(struct moxa_port *); |
221 | static void MoxaPortFlushData(struct moxa_port *, int); |
222 | static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); |
223 | static int MoxaPortReadData(struct moxa_port *); |
224 | static int MoxaPortTxQueue(struct moxa_port *); |
225 | static int MoxaPortRxQueue(struct moxa_port *); |
226 | static int MoxaPortTxFree(struct moxa_port *); |
227 | static void MoxaPortTxDisable(struct moxa_port *); |
228 | static void MoxaPortTxEnable(struct moxa_port *); |
229 | static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); |
230 | static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); |
231 | static void MoxaSetFifo(struct moxa_port *port, int enable); |
232 | |
233 | /* |
234 | * I/O functions |
235 | */ |
236 | |
237 | static DEFINE_SPINLOCK(moxafunc_lock); |
238 | |
239 | static 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 | |
250 | static 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 | |
260 | static 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 | |
273 | static 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 | |
291 | static 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); |
376 | copy: |
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 | |
399 | static 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 | |
408 | static 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 | |
425 | static 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 | |
431 | static struct tty_driver *moxaDriver; |
432 | static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); |
433 | |
434 | /* |
435 | * HW init |
436 | */ |
437 | |
438 | static 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; |
456 | err: |
457 | return -EINVAL; |
458 | } |
459 | |
460 | static 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 | |
470 | static 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; |
510 | err: |
511 | printk(KERN_ERR "MOXA: bios upload failed -- board not found\n"); |
512 | return -EIO; |
513 | } |
514 | |
515 | static 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 | |
534 | static 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 | |
656 | static 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 | |
744 | static 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; |
828 | err: |
829 | printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); |
830 | return ret; |
831 | } |
832 | |
833 | static 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; |
897 | err_free: |
898 | for (i = 0; i < MAX_PORTS_PER_BOARD; i++) |
899 | tty_port_destroy(&brd->ports[i].port); |
900 | kfree(brd->ports); |
901 | err: |
902 | return ret; |
903 | } |
904 | |
905 | static 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 | struct tty_struct *tty = tty_port_tty_get( |
918 | &brd->ports[a].port); |
919 | if (tty) { |
920 | tty_hangup(tty); |
921 | tty_kref_put(tty); |
922 | } |
923 | } |
924 | for (a = 0; a < MAX_PORTS_PER_BOARD; a++) |
925 | tty_port_destroy(&brd->ports[a].port); |
926 | while (1) { |
927 | opened = 0; |
928 | for (a = 0; a < brd->numPorts; a++) |
929 | if (brd->ports[a].port.flags & ASYNC_INITIALIZED) |
930 | opened++; |
931 | mutex_unlock(&moxa_openlock); |
932 | if (!opened) |
933 | break; |
934 | msleep(50); |
935 | mutex_lock(&moxa_openlock); |
936 | } |
937 | |
938 | first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; |
939 | for (a = 0; a < brd->numPorts; a++) |
940 | tty_unregister_device(moxaDriver, first_idx + a); |
941 | |
942 | iounmap(brd->basemem); |
943 | brd->basemem = NULL; |
944 | kfree(brd->ports); |
945 | } |
946 | |
947 | #ifdef CONFIG_PCI |
948 | static int moxa_pci_probe(struct pci_dev *pdev, |
949 | const struct pci_device_id *ent) |
950 | { |
951 | struct moxa_board_conf *board; |
952 | unsigned int i; |
953 | int board_type = ent->driver_data; |
954 | int retval; |
955 | |
956 | retval = pci_enable_device(pdev); |
957 | if (retval) { |
958 | dev_err(&pdev->dev, "can't enable pci device\n"); |
959 | goto err; |
960 | } |
961 | |
962 | for (i = 0; i < MAX_BOARDS; i++) |
963 | if (moxa_boards[i].basemem == NULL) |
964 | break; |
965 | |
966 | retval = -ENODEV; |
967 | if (i >= MAX_BOARDS) { |
968 | dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " |
969 | "found. Board is ignored.\n", MAX_BOARDS); |
970 | goto err; |
971 | } |
972 | |
973 | board = &moxa_boards[i]; |
974 | |
975 | retval = pci_request_region(pdev, 2, "moxa-base"); |
976 | if (retval) { |
977 | dev_err(&pdev->dev, "can't request pci region 2\n"); |
978 | goto err; |
979 | } |
980 | |
981 | board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); |
982 | if (board->basemem == NULL) { |
983 | dev_err(&pdev->dev, "can't remap io space 2\n"); |
984 | retval = -ENOMEM; |
985 | goto err_reg; |
986 | } |
987 | |
988 | board->boardType = board_type; |
989 | switch (board_type) { |
990 | case MOXA_BOARD_C218_ISA: |
991 | case MOXA_BOARD_C218_PCI: |
992 | board->numPorts = 8; |
993 | break; |
994 | |
995 | case MOXA_BOARD_CP204J: |
996 | board->numPorts = 4; |
997 | break; |
998 | default: |
999 | board->numPorts = 0; |
1000 | break; |
1001 | } |
1002 | board->busType = MOXA_BUS_TYPE_PCI; |
1003 | |
1004 | retval = moxa_init_board(board, &pdev->dev); |
1005 | if (retval) |
1006 | goto err_base; |
1007 | |
1008 | pci_set_drvdata(pdev, board); |
1009 | |
1010 | dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", |
1011 | moxa_brdname[board_type - 1], board->numPorts); |
1012 | |
1013 | return 0; |
1014 | err_base: |
1015 | iounmap(board->basemem); |
1016 | board->basemem = NULL; |
1017 | err_reg: |
1018 | pci_release_region(pdev, 2); |
1019 | err: |
1020 | return retval; |
1021 | } |
1022 | |
1023 | static void moxa_pci_remove(struct pci_dev *pdev) |
1024 | { |
1025 | struct moxa_board_conf *brd = pci_get_drvdata(pdev); |
1026 | |
1027 | moxa_board_deinit(brd); |
1028 | |
1029 | pci_release_region(pdev, 2); |
1030 | } |
1031 | |
1032 | static struct pci_driver moxa_pci_driver = { |
1033 | .name = "moxa", |
1034 | .id_table = moxa_pcibrds, |
1035 | .probe = moxa_pci_probe, |
1036 | .remove = moxa_pci_remove |
1037 | }; |
1038 | #endif /* CONFIG_PCI */ |
1039 | |
1040 | static int __init moxa_init(void) |
1041 | { |
1042 | unsigned int isabrds = 0; |
1043 | int retval = 0; |
1044 | struct moxa_board_conf *brd = moxa_boards; |
1045 | unsigned int i; |
1046 | |
1047 | printk(KERN_INFO "MOXA Intellio family driver version %s\n", |
1048 | MOXA_VERSION); |
1049 | |
1050 | tty_port_init(&moxa_service_port); |
1051 | |
1052 | moxaDriver = tty_alloc_driver(MAX_PORTS + 1, |
1053 | TTY_DRIVER_REAL_RAW | |
1054 | TTY_DRIVER_DYNAMIC_DEV); |
1055 | if (IS_ERR(moxaDriver)) |
1056 | return PTR_ERR(moxaDriver); |
1057 | |
1058 | moxaDriver->name = "ttyMX"; |
1059 | moxaDriver->major = ttymajor; |
1060 | moxaDriver->minor_start = 0; |
1061 | moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; |
1062 | moxaDriver->subtype = SERIAL_TYPE_NORMAL; |
1063 | moxaDriver->init_termios = tty_std_termios; |
1064 | moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; |
1065 | moxaDriver->init_termios.c_ispeed = 9600; |
1066 | moxaDriver->init_termios.c_ospeed = 9600; |
1067 | tty_set_operations(moxaDriver, &moxa_ops); |
1068 | /* Having one more port only for ioctls is ugly */ |
1069 | tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); |
1070 | |
1071 | if (tty_register_driver(moxaDriver)) { |
1072 | printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); |
1073 | put_tty_driver(moxaDriver); |
1074 | return -1; |
1075 | } |
1076 | |
1077 | /* Find the boards defined from module args. */ |
1078 | |
1079 | for (i = 0; i < MAX_BOARDS; i++) { |
1080 | if (!baseaddr[i]) |
1081 | break; |
1082 | if (type[i] == MOXA_BOARD_C218_ISA || |
1083 | type[i] == MOXA_BOARD_C320_ISA) { |
1084 | pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", |
1085 | isabrds + 1, moxa_brdname[type[i] - 1], |
1086 | baseaddr[i]); |
1087 | brd->boardType = type[i]; |
1088 | brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : |
1089 | numports[i]; |
1090 | brd->busType = MOXA_BUS_TYPE_ISA; |
1091 | brd->basemem = ioremap_nocache(baseaddr[i], 0x4000); |
1092 | if (!brd->basemem) { |
1093 | printk(KERN_ERR "MOXA: can't remap %lx\n", |
1094 | baseaddr[i]); |
1095 | continue; |
1096 | } |
1097 | if (moxa_init_board(brd, NULL)) { |
1098 | iounmap(brd->basemem); |
1099 | brd->basemem = NULL; |
1100 | continue; |
1101 | } |
1102 | |
1103 | printk(KERN_INFO "MOXA isa board found at 0x%.8lu and " |
1104 | "ready (%u ports, firmware loaded)\n", |
1105 | baseaddr[i], brd->numPorts); |
1106 | |
1107 | brd++; |
1108 | isabrds++; |
1109 | } |
1110 | } |
1111 | |
1112 | #ifdef CONFIG_PCI |
1113 | retval = pci_register_driver(&moxa_pci_driver); |
1114 | if (retval) { |
1115 | printk(KERN_ERR "Can't register MOXA pci driver!\n"); |
1116 | if (isabrds) |
1117 | retval = 0; |
1118 | } |
1119 | #endif |
1120 | |
1121 | return retval; |
1122 | } |
1123 | |
1124 | static void __exit moxa_exit(void) |
1125 | { |
1126 | unsigned int i; |
1127 | |
1128 | #ifdef CONFIG_PCI |
1129 | pci_unregister_driver(&moxa_pci_driver); |
1130 | #endif |
1131 | |
1132 | for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ |
1133 | if (moxa_boards[i].ready) |
1134 | moxa_board_deinit(&moxa_boards[i]); |
1135 | |
1136 | del_timer_sync(&moxaTimer); |
1137 | |
1138 | if (tty_unregister_driver(moxaDriver)) |
1139 | printk(KERN_ERR "Couldn't unregister MOXA Intellio family " |
1140 | "serial driver\n"); |
1141 | put_tty_driver(moxaDriver); |
1142 | } |
1143 | |
1144 | module_init(moxa_init); |
1145 | module_exit(moxa_exit); |
1146 | |
1147 | static void moxa_shutdown(struct tty_port *port) |
1148 | { |
1149 | struct moxa_port *ch = container_of(port, struct moxa_port, port); |
1150 | MoxaPortDisable(ch); |
1151 | MoxaPortFlushData(ch, 2); |
1152 | } |
1153 | |
1154 | static int moxa_carrier_raised(struct tty_port *port) |
1155 | { |
1156 | struct moxa_port *ch = container_of(port, struct moxa_port, port); |
1157 | int dcd; |
1158 | |
1159 | spin_lock_irq(&port->lock); |
1160 | dcd = ch->DCDState; |
1161 | spin_unlock_irq(&port->lock); |
1162 | return dcd; |
1163 | } |
1164 | |
1165 | static void moxa_dtr_rts(struct tty_port *port, int onoff) |
1166 | { |
1167 | struct moxa_port *ch = container_of(port, struct moxa_port, port); |
1168 | MoxaPortLineCtrl(ch, onoff, onoff); |
1169 | } |
1170 | |
1171 | |
1172 | static int moxa_open(struct tty_struct *tty, struct file *filp) |
1173 | { |
1174 | struct moxa_board_conf *brd; |
1175 | struct moxa_port *ch; |
1176 | int port; |
1177 | |
1178 | port = tty->index; |
1179 | if (port == MAX_PORTS) { |
1180 | return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; |
1181 | } |
1182 | if (mutex_lock_interruptible(&moxa_openlock)) |
1183 | return -ERESTARTSYS; |
1184 | brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; |
1185 | if (!brd->ready) { |
1186 | mutex_unlock(&moxa_openlock); |
1187 | return -ENODEV; |
1188 | } |
1189 | |
1190 | if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { |
1191 | mutex_unlock(&moxa_openlock); |
1192 | return -ENODEV; |
1193 | } |
1194 | |
1195 | ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; |
1196 | ch->port.count++; |
1197 | tty->driver_data = ch; |
1198 | tty_port_tty_set(&ch->port, tty); |
1199 | mutex_lock(&ch->port.mutex); |
1200 | if (!(ch->port.flags & ASYNC_INITIALIZED)) { |
1201 | ch->statusflags = 0; |
1202 | moxa_set_tty_param(tty, &tty->termios); |
1203 | MoxaPortLineCtrl(ch, 1, 1); |
1204 | MoxaPortEnable(ch); |
1205 | MoxaSetFifo(ch, ch->type == PORT_16550A); |
1206 | ch->port.flags |= ASYNC_INITIALIZED; |
1207 | } |
1208 | mutex_unlock(&ch->port.mutex); |
1209 | mutex_unlock(&moxa_openlock); |
1210 | |
1211 | return tty_port_block_til_ready(&ch->port, tty, filp); |
1212 | } |
1213 | |
1214 | static void moxa_close(struct tty_struct *tty, struct file *filp) |
1215 | { |
1216 | struct moxa_port *ch = tty->driver_data; |
1217 | ch->cflag = tty->termios.c_cflag; |
1218 | tty_port_close(&ch->port, tty, filp); |
1219 | } |
1220 | |
1221 | static int moxa_write(struct tty_struct *tty, |
1222 | const unsigned char *buf, int count) |
1223 | { |
1224 | struct moxa_port *ch = tty->driver_data; |
1225 | unsigned long flags; |
1226 | int len; |
1227 | |
1228 | if (ch == NULL) |
1229 | return 0; |
1230 | |
1231 | spin_lock_irqsave(&moxa_lock, flags); |
1232 | len = MoxaPortWriteData(tty, buf, count); |
1233 | spin_unlock_irqrestore(&moxa_lock, flags); |
1234 | |
1235 | set_bit(LOWWAIT, &ch->statusflags); |
1236 | return len; |
1237 | } |
1238 | |
1239 | static int moxa_write_room(struct tty_struct *tty) |
1240 | { |
1241 | struct moxa_port *ch; |
1242 | |
1243 | if (tty->stopped) |
1244 | return 0; |
1245 | ch = tty->driver_data; |
1246 | if (ch == NULL) |
1247 | return 0; |
1248 | return MoxaPortTxFree(ch); |
1249 | } |
1250 | |
1251 | static void moxa_flush_buffer(struct tty_struct *tty) |
1252 | { |
1253 | struct moxa_port *ch = tty->driver_data; |
1254 | |
1255 | if (ch == NULL) |
1256 | return; |
1257 | MoxaPortFlushData(ch, 1); |
1258 | tty_wakeup(tty); |
1259 | } |
1260 | |
1261 | static int moxa_chars_in_buffer(struct tty_struct *tty) |
1262 | { |
1263 | struct moxa_port *ch = tty->driver_data; |
1264 | int chars; |
1265 | |
1266 | chars = MoxaPortTxQueue(ch); |
1267 | if (chars) |
1268 | /* |
1269 | * Make it possible to wakeup anything waiting for output |
1270 | * in tty_ioctl.c, etc. |
1271 | */ |
1272 | set_bit(EMPTYWAIT, &ch->statusflags); |
1273 | return chars; |
1274 | } |
1275 | |
1276 | static int moxa_tiocmget(struct tty_struct *tty) |
1277 | { |
1278 | struct moxa_port *ch = tty->driver_data; |
1279 | int flag = 0, dtr, rts; |
1280 | |
1281 | MoxaPortGetLineOut(ch, &dtr, &rts); |
1282 | if (dtr) |
1283 | flag |= TIOCM_DTR; |
1284 | if (rts) |
1285 | flag |= TIOCM_RTS; |
1286 | dtr = MoxaPortLineStatus(ch); |
1287 | if (dtr & 1) |
1288 | flag |= TIOCM_CTS; |
1289 | if (dtr & 2) |
1290 | flag |= TIOCM_DSR; |
1291 | if (dtr & 4) |
1292 | flag |= TIOCM_CD; |
1293 | return flag; |
1294 | } |
1295 | |
1296 | static int moxa_tiocmset(struct tty_struct *tty, |
1297 | unsigned int set, unsigned int clear) |
1298 | { |
1299 | struct moxa_port *ch; |
1300 | int dtr, rts; |
1301 | |
1302 | mutex_lock(&moxa_openlock); |
1303 | ch = tty->driver_data; |
1304 | if (!ch) { |
1305 | mutex_unlock(&moxa_openlock); |
1306 | return -EINVAL; |
1307 | } |
1308 | |
1309 | MoxaPortGetLineOut(ch, &dtr, &rts); |
1310 | if (set & TIOCM_RTS) |
1311 | rts = 1; |
1312 | if (set & TIOCM_DTR) |
1313 | dtr = 1; |
1314 | if (clear & TIOCM_RTS) |
1315 | rts = 0; |
1316 | if (clear & TIOCM_DTR) |
1317 | dtr = 0; |
1318 | MoxaPortLineCtrl(ch, dtr, rts); |
1319 | mutex_unlock(&moxa_openlock); |
1320 | return 0; |
1321 | } |
1322 | |
1323 | static void moxa_set_termios(struct tty_struct *tty, |
1324 | struct ktermios *old_termios) |
1325 | { |
1326 | struct moxa_port *ch = tty->driver_data; |
1327 | |
1328 | if (ch == NULL) |
1329 | return; |
1330 | moxa_set_tty_param(tty, old_termios); |
1331 | if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) |
1332 | wake_up_interruptible(&ch->port.open_wait); |
1333 | } |
1334 | |
1335 | static void moxa_stop(struct tty_struct *tty) |
1336 | { |
1337 | struct moxa_port *ch = tty->driver_data; |
1338 | |
1339 | if (ch == NULL) |
1340 | return; |
1341 | MoxaPortTxDisable(ch); |
1342 | set_bit(TXSTOPPED, &ch->statusflags); |
1343 | } |
1344 | |
1345 | |
1346 | static void moxa_start(struct tty_struct *tty) |
1347 | { |
1348 | struct moxa_port *ch = tty->driver_data; |
1349 | |
1350 | if (ch == NULL) |
1351 | return; |
1352 | |
1353 | if (!test_bit(TXSTOPPED, &ch->statusflags)) |
1354 | return; |
1355 | |
1356 | MoxaPortTxEnable(ch); |
1357 | clear_bit(TXSTOPPED, &ch->statusflags); |
1358 | } |
1359 | |
1360 | static void moxa_hangup(struct tty_struct *tty) |
1361 | { |
1362 | struct moxa_port *ch = tty->driver_data; |
1363 | tty_port_hangup(&ch->port); |
1364 | } |
1365 | |
1366 | static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) |
1367 | { |
1368 | struct tty_struct *tty; |
1369 | unsigned long flags; |
1370 | dcd = !!dcd; |
1371 | |
1372 | spin_lock_irqsave(&p->port.lock, flags); |
1373 | if (dcd != p->DCDState) { |
1374 | p->DCDState = dcd; |
1375 | spin_unlock_irqrestore(&p->port.lock, flags); |
1376 | tty = tty_port_tty_get(&p->port); |
1377 | if (tty && !C_CLOCAL(tty) && !dcd) |
1378 | tty_hangup(tty); |
1379 | tty_kref_put(tty); |
1380 | } |
1381 | else |
1382 | spin_unlock_irqrestore(&p->port.lock, flags); |
1383 | } |
1384 | |
1385 | static int moxa_poll_port(struct moxa_port *p, unsigned int handle, |
1386 | u16 __iomem *ip) |
1387 | { |
1388 | struct tty_struct *tty = tty_port_tty_get(&p->port); |
1389 | void __iomem *ofsAddr; |
1390 | unsigned int inited = p->port.flags & ASYNC_INITIALIZED; |
1391 | u16 intr; |
1392 | |
1393 | if (tty) { |
1394 | if (test_bit(EMPTYWAIT, &p->statusflags) && |
1395 | MoxaPortTxQueue(p) == 0) { |
1396 | clear_bit(EMPTYWAIT, &p->statusflags); |
1397 | tty_wakeup(tty); |
1398 | } |
1399 | if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped && |
1400 | MoxaPortTxQueue(p) <= WAKEUP_CHARS) { |
1401 | clear_bit(LOWWAIT, &p->statusflags); |
1402 | tty_wakeup(tty); |
1403 | } |
1404 | |
1405 | if (inited && !test_bit(TTY_THROTTLED, &tty->flags) && |
1406 | MoxaPortRxQueue(p) > 0) { /* RX */ |
1407 | MoxaPortReadData(p); |
1408 | tty_schedule_flip(&p->port); |
1409 | } |
1410 | } else { |
1411 | clear_bit(EMPTYWAIT, &p->statusflags); |
1412 | MoxaPortFlushData(p, 0); /* flush RX */ |
1413 | } |
1414 | |
1415 | if (!handle) /* nothing else to do */ |
1416 | goto put; |
1417 | |
1418 | intr = readw(ip); /* port irq status */ |
1419 | if (intr == 0) |
1420 | goto put; |
1421 | |
1422 | writew(0, ip); /* ACK port */ |
1423 | ofsAddr = p->tableAddr; |
1424 | if (intr & IntrTx) /* disable tx intr */ |
1425 | writew(readw(ofsAddr + HostStat) & ~WakeupTx, |
1426 | ofsAddr + HostStat); |
1427 | |
1428 | if (!inited) |
1429 | goto put; |
1430 | |
1431 | if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ |
1432 | tty_insert_flip_char(&p->port, 0, TTY_BREAK); |
1433 | tty_schedule_flip(&p->port); |
1434 | } |
1435 | |
1436 | if (intr & IntrLine) |
1437 | moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); |
1438 | put: |
1439 | tty_kref_put(tty); |
1440 | |
1441 | return 0; |
1442 | } |
1443 | |
1444 | static void moxa_poll(unsigned long ignored) |
1445 | { |
1446 | struct moxa_board_conf *brd; |
1447 | u16 __iomem *ip; |
1448 | unsigned int card, port, served = 0; |
1449 | |
1450 | spin_lock(&moxa_lock); |
1451 | for (card = 0; card < MAX_BOARDS; card++) { |
1452 | brd = &moxa_boards[card]; |
1453 | if (!brd->ready) |
1454 | continue; |
1455 | |
1456 | served++; |
1457 | |
1458 | ip = NULL; |
1459 | if (readb(brd->intPend) == 0xff) |
1460 | ip = brd->intTable + readb(brd->intNdx); |
1461 | |
1462 | for (port = 0; port < brd->numPorts; port++) |
1463 | moxa_poll_port(&brd->ports[port], !!ip, ip + port); |
1464 | |
1465 | if (ip) |
1466 | writeb(0, brd->intPend); /* ACK */ |
1467 | |
1468 | if (moxaLowWaterChk) { |
1469 | struct moxa_port *p = brd->ports; |
1470 | for (port = 0; port < brd->numPorts; port++, p++) |
1471 | if (p->lowChkFlag) { |
1472 | p->lowChkFlag = 0; |
1473 | moxa_low_water_check(p->tableAddr); |
1474 | } |
1475 | } |
1476 | } |
1477 | moxaLowWaterChk = 0; |
1478 | |
1479 | if (served) |
1480 | mod_timer(&moxaTimer, jiffies + HZ / 50); |
1481 | spin_unlock(&moxa_lock); |
1482 | } |
1483 | |
1484 | /******************************************************************************/ |
1485 | |
1486 | static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) |
1487 | { |
1488 | register struct ktermios *ts = &tty->termios; |
1489 | struct moxa_port *ch = tty->driver_data; |
1490 | int rts, cts, txflow, rxflow, xany, baud; |
1491 | |
1492 | rts = cts = txflow = rxflow = xany = 0; |
1493 | if (ts->c_cflag & CRTSCTS) |
1494 | rts = cts = 1; |
1495 | if (ts->c_iflag & IXON) |
1496 | txflow = 1; |
1497 | if (ts->c_iflag & IXOFF) |
1498 | rxflow = 1; |
1499 | if (ts->c_iflag & IXANY) |
1500 | xany = 1; |
1501 | |
1502 | /* Clear the features we don't support */ |
1503 | ts->c_cflag &= ~CMSPAR; |
1504 | MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); |
1505 | baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); |
1506 | if (baud == -1) |
1507 | baud = tty_termios_baud_rate(old_termios); |
1508 | /* Not put the baud rate into the termios data */ |
1509 | tty_encode_baud_rate(tty, baud, baud); |
1510 | } |
1511 | |
1512 | /***************************************************************************** |
1513 | * Driver level functions: * |
1514 | *****************************************************************************/ |
1515 | |
1516 | static void MoxaPortFlushData(struct moxa_port *port, int mode) |
1517 | { |
1518 | void __iomem *ofsAddr; |
1519 | if (mode < 0 || mode > 2) |
1520 | return; |
1521 | ofsAddr = port->tableAddr; |
1522 | moxafunc(ofsAddr, FC_FlushQueue, mode); |
1523 | if (mode != 1) { |
1524 | port->lowChkFlag = 0; |
1525 | moxa_low_water_check(ofsAddr); |
1526 | } |
1527 | } |
1528 | |
1529 | /* |
1530 | * Moxa Port Number Description: |
1531 | * |
1532 | * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, |
1533 | * the port number using in MOXA driver functions will be 0 to 31 for |
1534 | * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 |
1535 | * to 127 for fourth. For example, if you setup three MOXA boards, |
1536 | * first board is C218, second board is C320-16 and third board is |
1537 | * C320-32. The port number of first board (C218 - 8 ports) is from |
1538 | * 0 to 7. The port number of second board (C320 - 16 ports) is form |
1539 | * 32 to 47. The port number of third board (C320 - 32 ports) is from |
1540 | * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to |
1541 | * 127 will be invalid. |
1542 | * |
1543 | * |
1544 | * Moxa Functions Description: |
1545 | * |
1546 | * Function 1: Driver initialization routine, this routine must be |
1547 | * called when initialized driver. |
1548 | * Syntax: |
1549 | * void MoxaDriverInit(); |
1550 | * |
1551 | * |
1552 | * Function 2: Moxa driver private IOCTL command processing. |
1553 | * Syntax: |
1554 | * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); |
1555 | * |
1556 | * unsigned int cmd : IOCTL command |
1557 | * unsigned long arg : IOCTL argument |
1558 | * int port : port number (0 - 127) |
1559 | * |
1560 | * return: 0 (OK) |
1561 | * -EINVAL |
1562 | * -ENOIOCTLCMD |
1563 | * |
1564 | * |
1565 | * Function 6: Enable this port to start Tx/Rx data. |
1566 | * Syntax: |
1567 | * void MoxaPortEnable(int port); |
1568 | * int port : port number (0 - 127) |
1569 | * |
1570 | * |
1571 | * Function 7: Disable this port |
1572 | * Syntax: |
1573 | * void MoxaPortDisable(int port); |
1574 | * int port : port number (0 - 127) |
1575 | * |
1576 | * |
1577 | * Function 10: Setting baud rate of this port. |
1578 | * Syntax: |
1579 | * speed_t MoxaPortSetBaud(int port, speed_t baud); |
1580 | * int port : port number (0 - 127) |
1581 | * long baud : baud rate (50 - 115200) |
1582 | * |
1583 | * return: 0 : this port is invalid or baud < 50 |
1584 | * 50 - 115200 : the real baud rate set to the port, if |
1585 | * the argument baud is large than maximun |
1586 | * available baud rate, the real setting |
1587 | * baud rate will be the maximun baud rate. |
1588 | * |
1589 | * |
1590 | * Function 12: Configure the port. |
1591 | * Syntax: |
1592 | * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); |
1593 | * int port : port number (0 - 127) |
1594 | * struct ktermios * termio : termio structure pointer |
1595 | * speed_t baud : baud rate |
1596 | * |
1597 | * return: -1 : this port is invalid or termio == NULL |
1598 | * 0 : setting O.K. |
1599 | * |
1600 | * |
1601 | * Function 13: Get the DTR/RTS state of this port. |
1602 | * Syntax: |
1603 | * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); |
1604 | * int port : port number (0 - 127) |
1605 | * int * dtrState : pointer to INT to receive the current DTR |
1606 | * state. (if NULL, this function will not |
1607 | * write to this address) |
1608 | * int * rtsState : pointer to INT to receive the current RTS |
1609 | * state. (if NULL, this function will not |
1610 | * write to this address) |
1611 | * |
1612 | * return: -1 : this port is invalid |
1613 | * 0 : O.K. |
1614 | * |
1615 | * |
1616 | * Function 14: Setting the DTR/RTS output state of this port. |
1617 | * Syntax: |
1618 | * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); |
1619 | * int port : port number (0 - 127) |
1620 | * int dtrState : DTR output state (0: off, 1: on) |
1621 | * int rtsState : RTS output state (0: off, 1: on) |
1622 | * |
1623 | * |
1624 | * Function 15: Setting the flow control of this port. |
1625 | * Syntax: |
1626 | * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, |
1627 | * int txFlow,int xany); |
1628 | * int port : port number (0 - 127) |
1629 | * int rtsFlow : H/W RTS flow control (0: no, 1: yes) |
1630 | * int ctsFlow : H/W CTS flow control (0: no, 1: yes) |
1631 | * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) |
1632 | * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) |
1633 | * int xany : S/W XANY flow control (0: no, 1: yes) |
1634 | * |
1635 | * |
1636 | * Function 16: Get ths line status of this port |
1637 | * Syntax: |
1638 | * int MoxaPortLineStatus(int port); |
1639 | * int port : port number (0 - 127) |
1640 | * |
1641 | * return: Bit 0 - CTS state (0: off, 1: on) |
1642 | * Bit 1 - DSR state (0: off, 1: on) |
1643 | * Bit 2 - DCD state (0: off, 1: on) |
1644 | * |
1645 | * |
1646 | * Function 19: Flush the Rx/Tx buffer data of this port. |
1647 | * Syntax: |
1648 | * void MoxaPortFlushData(int port, int mode); |
1649 | * int port : port number (0 - 127) |
1650 | * int mode |
1651 | * 0 : flush the Rx buffer |
1652 | * 1 : flush the Tx buffer |
1653 | * 2 : flush the Rx and Tx buffer |
1654 | * |
1655 | * |
1656 | * Function 20: Write data. |
1657 | * Syntax: |
1658 | * int MoxaPortWriteData(int port, unsigned char * buffer, int length); |
1659 | * int port : port number (0 - 127) |
1660 | * unsigned char * buffer : pointer to write data buffer. |
1661 | * int length : write data length |
1662 | * |
1663 | * return: 0 - length : real write data length |
1664 | * |
1665 | * |
1666 | * Function 21: Read data. |
1667 | * Syntax: |
1668 | * int MoxaPortReadData(int port, struct tty_struct *tty); |
1669 | * int port : port number (0 - 127) |
1670 | * struct tty_struct *tty : tty for data |
1671 | * |
1672 | * return: 0 - length : real read data length |
1673 | * |
1674 | * |
1675 | * Function 24: Get the Tx buffer current queued data bytes |
1676 | * Syntax: |
1677 | * int MoxaPortTxQueue(int port); |
1678 | * int port : port number (0 - 127) |
1679 | * |
1680 | * return: .. : Tx buffer current queued data bytes |
1681 | * |
1682 | * |
1683 | * Function 25: Get the Tx buffer current free space |
1684 | * Syntax: |
1685 | * int MoxaPortTxFree(int port); |
1686 | * int port : port number (0 - 127) |
1687 | * |
1688 | * return: .. : Tx buffer current free space |
1689 | * |
1690 | * |
1691 | * Function 26: Get the Rx buffer current queued data bytes |
1692 | * Syntax: |
1693 | * int MoxaPortRxQueue(int port); |
1694 | * int port : port number (0 - 127) |
1695 | * |
1696 | * return: .. : Rx buffer current queued data bytes |
1697 | * |
1698 | * |
1699 | * Function 28: Disable port data transmission. |
1700 | * Syntax: |
1701 | * void MoxaPortTxDisable(int port); |
1702 | * int port : port number (0 - 127) |
1703 | * |
1704 | * |
1705 | * Function 29: Enable port data transmission. |
1706 | * Syntax: |
1707 | * void MoxaPortTxEnable(int port); |
1708 | * int port : port number (0 - 127) |
1709 | * |
1710 | * |
1711 | * Function 31: Get the received BREAK signal count and reset it. |
1712 | * Syntax: |
1713 | * int MoxaPortResetBrkCnt(int port); |
1714 | * int port : port number (0 - 127) |
1715 | * |
1716 | * return: 0 - .. : BREAK signal count |
1717 | * |
1718 | * |
1719 | */ |
1720 | |
1721 | static void MoxaPortEnable(struct moxa_port *port) |
1722 | { |
1723 | void __iomem *ofsAddr; |
1724 | u16 lowwater = 512; |
1725 | |
1726 | ofsAddr = port->tableAddr; |
1727 | writew(lowwater, ofsAddr + Low_water); |
1728 | if (MOXA_IS_320(port->board)) |
1729 | moxafunc(ofsAddr, FC_SetBreakIrq, 0); |
1730 | else |
1731 | writew(readw(ofsAddr + HostStat) | WakeupBreak, |
1732 | ofsAddr + HostStat); |
1733 | |
1734 | moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); |
1735 | moxafunc(ofsAddr, FC_FlushQueue, 2); |
1736 | |
1737 | moxafunc(ofsAddr, FC_EnableCH, Magic_code); |
1738 | MoxaPortLineStatus(port); |
1739 | } |
1740 | |
1741 | static void MoxaPortDisable(struct moxa_port *port) |
1742 | { |
1743 | void __iomem *ofsAddr = port->tableAddr; |
1744 | |
1745 | moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ |
1746 | moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); |
1747 | writew(0, ofsAddr + HostStat); |
1748 | moxafunc(ofsAddr, FC_DisableCH, Magic_code); |
1749 | } |
1750 | |
1751 | static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) |
1752 | { |
1753 | void __iomem *ofsAddr = port->tableAddr; |
1754 | unsigned int clock, val; |
1755 | speed_t max; |
1756 | |
1757 | max = MOXA_IS_320(port->board) ? 460800 : 921600; |
1758 | if (baud < 50) |
1759 | return 0; |
1760 | if (baud > max) |
1761 | baud = max; |
1762 | clock = 921600; |
1763 | val = clock / baud; |
1764 | moxafunc(ofsAddr, FC_SetBaud, val); |
1765 | baud = clock / val; |
1766 | return baud; |
1767 | } |
1768 | |
1769 | static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, |
1770 | speed_t baud) |
1771 | { |
1772 | void __iomem *ofsAddr; |
1773 | tcflag_t mode = 0; |
1774 | |
1775 | ofsAddr = port->tableAddr; |
1776 | |
1777 | mode = termio->c_cflag & CSIZE; |
1778 | if (mode == CS5) |
1779 | mode = MX_CS5; |
1780 | else if (mode == CS6) |
1781 | mode = MX_CS6; |
1782 | else if (mode == CS7) |
1783 | mode = MX_CS7; |
1784 | else if (mode == CS8) |
1785 | mode = MX_CS8; |
1786 | |
1787 | if (termio->c_cflag & CSTOPB) { |
1788 | if (mode == MX_CS5) |
1789 | mode |= MX_STOP15; |
1790 | else |
1791 | mode |= MX_STOP2; |
1792 | } else |
1793 | mode |= MX_STOP1; |
1794 | |
1795 | if (termio->c_cflag & PARENB) { |
1796 | if (termio->c_cflag & PARODD) |
1797 | mode |= MX_PARODD; |
1798 | else |
1799 | mode |= MX_PAREVEN; |
1800 | } else |
1801 | mode |= MX_PARNONE; |
1802 | |
1803 | moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); |
1804 | |
1805 | if (MOXA_IS_320(port->board) && baud >= 921600) |
1806 | return -1; |
1807 | |
1808 | baud = MoxaPortSetBaud(port, baud); |
1809 | |
1810 | if (termio->c_iflag & (IXON | IXOFF | IXANY)) { |
1811 | spin_lock_irq(&moxafunc_lock); |
1812 | writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); |
1813 | writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); |
1814 | writeb(FC_SetXonXoff, ofsAddr + FuncCode); |
1815 | moxa_wait_finish(ofsAddr); |
1816 | spin_unlock_irq(&moxafunc_lock); |
1817 | |
1818 | } |
1819 | return baud; |
1820 | } |
1821 | |
1822 | static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, |
1823 | int *rtsState) |
1824 | { |
1825 | if (dtrState) |
1826 | *dtrState = !!(port->lineCtrl & DTR_ON); |
1827 | if (rtsState) |
1828 | *rtsState = !!(port->lineCtrl & RTS_ON); |
1829 | |
1830 | return 0; |
1831 | } |
1832 | |
1833 | static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) |
1834 | { |
1835 | u8 mode = 0; |
1836 | |
1837 | if (dtr) |
1838 | mode |= DTR_ON; |
1839 | if (rts) |
1840 | mode |= RTS_ON; |
1841 | port->lineCtrl = mode; |
1842 | moxafunc(port->tableAddr, FC_LineControl, mode); |
1843 | } |
1844 | |
1845 | static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, |
1846 | int txflow, int rxflow, int txany) |
1847 | { |
1848 | int mode = 0; |
1849 | |
1850 | if (rts) |
1851 | mode |= RTS_FlowCtl; |
1852 | if (cts) |
1853 | mode |= CTS_FlowCtl; |
1854 | if (txflow) |
1855 | mode |= Tx_FlowCtl; |
1856 | if (rxflow) |
1857 | mode |= Rx_FlowCtl; |
1858 | if (txany) |
1859 | mode |= IXM_IXANY; |
1860 | moxafunc(port->tableAddr, FC_SetFlowCtl, mode); |
1861 | } |
1862 | |
1863 | static int MoxaPortLineStatus(struct moxa_port *port) |
1864 | { |
1865 | void __iomem *ofsAddr; |
1866 | int val; |
1867 | |
1868 | ofsAddr = port->tableAddr; |
1869 | if (MOXA_IS_320(port->board)) |
1870 | val = moxafuncret(ofsAddr, FC_LineStatus, 0); |
1871 | else |
1872 | val = readw(ofsAddr + FlagStat) >> 4; |
1873 | val &= 0x0B; |
1874 | if (val & 8) |
1875 | val |= 4; |
1876 | moxa_new_dcdstate(port, val & 8); |
1877 | val &= 7; |
1878 | return val; |
1879 | } |
1880 | |
1881 | static int MoxaPortWriteData(struct tty_struct *tty, |
1882 | const unsigned char *buffer, int len) |
1883 | { |
1884 | struct moxa_port *port = tty->driver_data; |
1885 | void __iomem *baseAddr, *ofsAddr, *ofs; |
1886 | unsigned int c, total; |
1887 | u16 head, tail, tx_mask, spage, epage; |
1888 | u16 pageno, pageofs, bufhead; |
1889 | |
1890 | ofsAddr = port->tableAddr; |
1891 | baseAddr = port->board->basemem; |
1892 | tx_mask = readw(ofsAddr + TX_mask); |
1893 | spage = readw(ofsAddr + Page_txb); |
1894 | epage = readw(ofsAddr + EndPage_txb); |
1895 | tail = readw(ofsAddr + TXwptr); |
1896 | head = readw(ofsAddr + TXrptr); |
1897 | c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); |
1898 | if (c > len) |
1899 | c = len; |
1900 | moxaLog.txcnt[port->port.tty->index] += c; |
1901 | total = c; |
1902 | if (spage == epage) { |
1903 | bufhead = readw(ofsAddr + Ofs_txb); |
1904 | writew(spage, baseAddr + Control_reg); |
1905 | while (c > 0) { |
1906 | if (head > tail) |
1907 | len = head - tail - 1; |
1908 | else |
1909 | len = tx_mask + 1 - tail; |
1910 | len = (c > len) ? len : c; |
1911 | ofs = baseAddr + DynPage_addr + bufhead + tail; |
1912 | memcpy_toio(ofs, buffer, len); |
1913 | buffer += len; |
1914 | tail = (tail + len) & tx_mask; |
1915 | c -= len; |
1916 | } |
1917 | } else { |
1918 | pageno = spage + (tail >> 13); |
1919 | pageofs = tail & Page_mask; |
1920 | while (c > 0) { |
1921 | len = Page_size - pageofs; |
1922 | if (len > c) |
1923 | len = c; |
1924 | writeb(pageno, baseAddr + Control_reg); |
1925 | ofs = baseAddr + DynPage_addr + pageofs; |
1926 | memcpy_toio(ofs, buffer, len); |
1927 | buffer += len; |
1928 | if (++pageno == epage) |
1929 | pageno = spage; |
1930 | pageofs = 0; |
1931 | c -= len; |
1932 | } |
1933 | tail = (tail + total) & tx_mask; |
1934 | } |
1935 | writew(tail, ofsAddr + TXwptr); |
1936 | writeb(1, ofsAddr + CD180TXirq); /* start to send */ |
1937 | return total; |
1938 | } |
1939 | |
1940 | static int MoxaPortReadData(struct moxa_port *port) |
1941 | { |
1942 | struct tty_struct *tty = port->port.tty; |
1943 | unsigned char *dst; |
1944 | void __iomem *baseAddr, *ofsAddr, *ofs; |
1945 | unsigned int count, len, total; |
1946 | u16 tail, rx_mask, spage, epage; |
1947 | u16 pageno, pageofs, bufhead, head; |
1948 | |
1949 | ofsAddr = port->tableAddr; |
1950 | baseAddr = port->board->basemem; |
1951 | head = readw(ofsAddr + RXrptr); |
1952 | tail = readw(ofsAddr + RXwptr); |
1953 | rx_mask = readw(ofsAddr + RX_mask); |
1954 | spage = readw(ofsAddr + Page_rxb); |
1955 | epage = readw(ofsAddr + EndPage_rxb); |
1956 | count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); |
1957 | if (count == 0) |
1958 | return 0; |
1959 | |
1960 | total = count; |
1961 | moxaLog.rxcnt[tty->index] += total; |
1962 | if (spage == epage) { |
1963 | bufhead = readw(ofsAddr + Ofs_rxb); |
1964 | writew(spage, baseAddr + Control_reg); |
1965 | while (count > 0) { |
1966 | ofs = baseAddr + DynPage_addr + bufhead + head; |
1967 | len = (tail >= head) ? (tail - head) : |
1968 | (rx_mask + 1 - head); |
1969 | len = tty_prepare_flip_string(&port->port, &dst, |
1970 | min(len, count)); |
1971 | memcpy_fromio(dst, ofs, len); |
1972 | head = (head + len) & rx_mask; |
1973 | count -= len; |
1974 | } |
1975 | } else { |
1976 | pageno = spage + (head >> 13); |
1977 | pageofs = head & Page_mask; |
1978 | while (count > 0) { |
1979 | writew(pageno, baseAddr + Control_reg); |
1980 | ofs = baseAddr + DynPage_addr + pageofs; |
1981 | len = tty_prepare_flip_string(&port->port, &dst, |
1982 | min(Page_size - pageofs, count)); |
1983 | memcpy_fromio(dst, ofs, len); |
1984 | |
1985 | count -= len; |
1986 | pageofs = (pageofs + len) & Page_mask; |
1987 | if (pageofs == 0 && ++pageno == epage) |
1988 | pageno = spage; |
1989 | } |
1990 | head = (head + total) & rx_mask; |
1991 | } |
1992 | writew(head, ofsAddr + RXrptr); |
1993 | if (readb(ofsAddr + FlagStat) & Xoff_state) { |
1994 | moxaLowWaterChk = 1; |
1995 | port->lowChkFlag = 1; |
1996 | } |
1997 | return total; |
1998 | } |
1999 | |
2000 | |
2001 | static int MoxaPortTxQueue(struct moxa_port *port) |
2002 | { |
2003 | void __iomem *ofsAddr = port->tableAddr; |
2004 | u16 rptr, wptr, mask; |
2005 | |
2006 | rptr = readw(ofsAddr + TXrptr); |
2007 | wptr = readw(ofsAddr + TXwptr); |
2008 | mask = readw(ofsAddr + TX_mask); |
2009 | return (wptr - rptr) & mask; |
2010 | } |
2011 | |
2012 | static int MoxaPortTxFree(struct moxa_port *port) |
2013 | { |
2014 | void __iomem *ofsAddr = port->tableAddr; |
2015 | u16 rptr, wptr, mask; |
2016 | |
2017 | rptr = readw(ofsAddr + TXrptr); |
2018 | wptr = readw(ofsAddr + TXwptr); |
2019 | mask = readw(ofsAddr + TX_mask); |
2020 | return mask - ((wptr - rptr) & mask); |
2021 | } |
2022 | |
2023 | static int MoxaPortRxQueue(struct moxa_port *port) |
2024 | { |
2025 | void __iomem *ofsAddr = port->tableAddr; |
2026 | u16 rptr, wptr, mask; |
2027 | |
2028 | rptr = readw(ofsAddr + RXrptr); |
2029 | wptr = readw(ofsAddr + RXwptr); |
2030 | mask = readw(ofsAddr + RX_mask); |
2031 | return (wptr - rptr) & mask; |
2032 | } |
2033 | |
2034 | static void MoxaPortTxDisable(struct moxa_port *port) |
2035 | { |
2036 | moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); |
2037 | } |
2038 | |
2039 | static void MoxaPortTxEnable(struct moxa_port *port) |
2040 | { |
2041 | moxafunc(port->tableAddr, FC_SetXonState, Magic_code); |
2042 | } |
2043 | |
2044 | static int moxa_get_serial_info(struct moxa_port *info, |
2045 | struct serial_struct __user *retinfo) |
2046 | { |
2047 | struct serial_struct tmp = { |
2048 | .type = info->type, |
2049 | .line = info->port.tty->index, |
2050 | .flags = info->port.flags, |
2051 | .baud_base = 921600, |
2052 | .close_delay = info->port.close_delay |
2053 | }; |
2054 | return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; |
2055 | } |
2056 | |
2057 | |
2058 | static int moxa_set_serial_info(struct moxa_port *info, |
2059 | struct serial_struct __user *new_info) |
2060 | { |
2061 | struct serial_struct new_serial; |
2062 | |
2063 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
2064 | return -EFAULT; |
2065 | |
2066 | if (new_serial.irq != 0 || new_serial.port != 0 || |
2067 | new_serial.custom_divisor != 0 || |
2068 | new_serial.baud_base != 921600) |
2069 | return -EPERM; |
2070 | |
2071 | if (!capable(CAP_SYS_ADMIN)) { |
2072 | if (((new_serial.flags & ~ASYNC_USR_MASK) != |
2073 | (info->port.flags & ~ASYNC_USR_MASK))) |
2074 | return -EPERM; |
2075 | } else |
2076 | info->port.close_delay = new_serial.close_delay * HZ / 100; |
2077 | |
2078 | new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); |
2079 | new_serial.flags |= (info->port.flags & ASYNC_FLAGS); |
2080 | |
2081 | MoxaSetFifo(info, new_serial.type == PORT_16550A); |
2082 | |
2083 | info->type = new_serial.type; |
2084 | return 0; |
2085 | } |
2086 | |
2087 | |
2088 | |
2089 | /***************************************************************************** |
2090 | * Static local functions: * |
2091 | *****************************************************************************/ |
2092 | |
2093 | static void MoxaSetFifo(struct moxa_port *port, int enable) |
2094 | { |
2095 | void __iomem *ofsAddr = port->tableAddr; |
2096 | |
2097 | if (!enable) { |
2098 | moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); |
2099 | moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); |
2100 | } else { |
2101 | moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); |
2102 | moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); |
2103 | } |
2104 | } |
2105 |
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Tags:
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