Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | /* | |
3 | * moxa.c -- MOXA Intellio family multiport serial driver. | |
4 | * | |
5 | * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw). | |
6 | * | |
7 | * This code is loosely based on the Linux serial driver, written by | |
8 | * Linus Torvalds, Theodore T'so and others. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
1da177e4 LT |
14 | */ |
15 | ||
16 | /* | |
17 | * MOXA Intellio Series Driver | |
18 | * for : LINUX | |
19 | * date : 1999/1/7 | |
20 | * version : 5.1 | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/module.h> |
24 | #include <linux/types.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/errno.h> | |
03718234 | 28 | #include <linux/firmware.h> |
1da177e4 LT |
29 | #include <linux/signal.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/tty.h> | |
34 | #include <linux/tty_flip.h> | |
35 | #include <linux/major.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/fcntl.h> | |
38 | #include <linux/ptrace.h> | |
39 | #include <linux/serial.h> | |
40 | #include <linux/tty_driver.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/pci.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/bitops.h> | |
95e07914 | 45 | #include <linux/completion.h> |
1da177e4 LT |
46 | |
47 | #include <asm/system.h> | |
48 | #include <asm/io.h> | |
49 | #include <asm/uaccess.h> | |
50 | ||
03718234 JS |
51 | #include "moxa.h" |
52 | ||
11324edd | 53 | #define MOXA_VERSION "5.1k" |
1da177e4 | 54 | |
03718234 JS |
55 | #define MOXA_FW_HDRLEN 32 |
56 | ||
11324edd JS |
57 | #define MOXAMAJOR 172 |
58 | #define MOXACUMAJOR 173 | |
1da177e4 | 59 | |
11324edd | 60 | #define MAX_BOARDS 4 /* Don't change this value */ |
1da177e4 | 61 | #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ |
11324edd | 62 | #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) |
1da177e4 LT |
63 | |
64 | /* | |
65 | * Define the Moxa PCI vendor and device IDs. | |
66 | */ | |
11324edd JS |
67 | #define MOXA_BUS_TYPE_ISA 0 |
68 | #define MOXA_BUS_TYPE_PCI 1 | |
1da177e4 | 69 | |
1da177e4 LT |
70 | enum { |
71 | MOXA_BOARD_C218_PCI = 1, | |
72 | MOXA_BOARD_C218_ISA, | |
73 | MOXA_BOARD_C320_PCI, | |
74 | MOXA_BOARD_C320_ISA, | |
75 | MOXA_BOARD_CP204J, | |
76 | }; | |
77 | ||
78 | static char *moxa_brdname[] = | |
79 | { | |
80 | "C218 Turbo PCI series", | |
81 | "C218 Turbo ISA series", | |
82 | "C320 Turbo PCI series", | |
83 | "C320 Turbo ISA series", | |
84 | "CP-204J series", | |
85 | }; | |
86 | ||
87 | #ifdef CONFIG_PCI | |
88 | static struct pci_device_id moxa_pcibrds[] = { | |
5ebb4078 JS |
89 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), |
90 | .driver_data = MOXA_BOARD_C218_PCI }, | |
91 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), | |
92 | .driver_data = MOXA_BOARD_C320_PCI }, | |
93 | { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), | |
94 | .driver_data = MOXA_BOARD_CP204J }, | |
1da177e4 LT |
95 | { 0 } |
96 | }; | |
97 | MODULE_DEVICE_TABLE(pci, moxa_pcibrds); | |
98 | #endif /* CONFIG_PCI */ | |
99 | ||
03718234 JS |
100 | struct moxa_port; |
101 | ||
8f8ecbad | 102 | static struct moxa_board_conf { |
1da177e4 LT |
103 | int boardType; |
104 | int numPorts; | |
1da177e4 | 105 | int busType; |
8f8ecbad | 106 | |
810ab09b | 107 | unsigned int ready; |
8f8ecbad | 108 | |
03718234 JS |
109 | struct moxa_port *ports; |
110 | ||
8f8ecbad JS |
111 | void __iomem *basemem; |
112 | void __iomem *intNdx; | |
113 | void __iomem *intPend; | |
114 | void __iomem *intTable; | |
115 | } moxa_boards[MAX_BOARDS]; | |
116 | ||
117 | struct mxser_mstatus { | |
118 | tcflag_t cflag; | |
119 | int cts; | |
120 | int dsr; | |
121 | int ri; | |
122 | int dcd; | |
9dff89cd | 123 | }; |
1da177e4 | 124 | |
8f8ecbad JS |
125 | struct moxaq_str { |
126 | int inq; | |
127 | int outq; | |
128 | }; | |
1da177e4 | 129 | |
8f8ecbad | 130 | struct moxa_port { |
b4173f45 | 131 | struct moxa_board_conf *board; |
1da177e4 | 132 | int type; |
1da177e4 | 133 | int close_delay; |
1da177e4 LT |
134 | int count; |
135 | int blocked_open; | |
1da177e4 LT |
136 | int asyncflags; |
137 | unsigned long statusflags; | |
138 | struct tty_struct *tty; | |
139 | int cflag; | |
140 | wait_queue_head_t open_wait; | |
95e07914 | 141 | struct completion close_wait; |
1da177e4 | 142 | |
8f8ecbad | 143 | struct timer_list emptyTimer; |
1da177e4 | 144 | |
8f8ecbad JS |
145 | char lineCtrl; |
146 | void __iomem *tableAddr; | |
8f8ecbad JS |
147 | char DCDState; |
148 | char lowChkFlag; | |
149 | ||
150 | ushort breakCnt; | |
151 | }; | |
1da177e4 LT |
152 | |
153 | /* statusflags */ | |
154 | #define TXSTOPPED 0x1 | |
155 | #define LOWWAIT 0x2 | |
156 | #define EMPTYWAIT 0x4 | |
157 | #define THROTTLE 0x8 | |
158 | ||
1da177e4 LT |
159 | #define SERIAL_DO_RESTART |
160 | ||
1da177e4 LT |
161 | #define WAKEUP_CHARS 256 |
162 | ||
1da177e4 LT |
163 | static int ttymajor = MOXAMAJOR; |
164 | /* Variables for insmod */ | |
165 | #ifdef MODULE | |
d353eca4 JS |
166 | static unsigned long baseaddr[MAX_BOARDS]; |
167 | static unsigned int type[MAX_BOARDS]; | |
168 | static unsigned int numports[MAX_BOARDS]; | |
1da177e4 LT |
169 | #endif |
170 | ||
171 | MODULE_AUTHOR("William Chen"); | |
172 | MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); | |
173 | MODULE_LICENSE("GPL"); | |
174 | #ifdef MODULE | |
d353eca4 JS |
175 | module_param_array(type, uint, NULL, 0); |
176 | MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); | |
177 | module_param_array(baseaddr, ulong, NULL, 0); | |
178 | MODULE_PARM_DESC(baseaddr, "base address"); | |
179 | module_param_array(numports, uint, NULL, 0); | |
180 | MODULE_PARM_DESC(numports, "numports (ignored for C218)"); | |
1da177e4 LT |
181 | #endif |
182 | module_param(ttymajor, int, 0); | |
1da177e4 | 183 | |
1da177e4 LT |
184 | /* |
185 | * static functions: | |
186 | */ | |
1da177e4 LT |
187 | static int moxa_open(struct tty_struct *, struct file *); |
188 | static void moxa_close(struct tty_struct *, struct file *); | |
189 | static int moxa_write(struct tty_struct *, const unsigned char *, int); | |
190 | static int moxa_write_room(struct tty_struct *); | |
191 | static void moxa_flush_buffer(struct tty_struct *); | |
192 | static int moxa_chars_in_buffer(struct tty_struct *); | |
193 | static void moxa_flush_chars(struct tty_struct *); | |
194 | static void moxa_put_char(struct tty_struct *, unsigned char); | |
195 | static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long); | |
196 | static void moxa_throttle(struct tty_struct *); | |
197 | static void moxa_unthrottle(struct tty_struct *); | |
606d099c | 198 | static void moxa_set_termios(struct tty_struct *, struct ktermios *); |
1da177e4 LT |
199 | static void moxa_stop(struct tty_struct *); |
200 | static void moxa_start(struct tty_struct *); | |
201 | static void moxa_hangup(struct tty_struct *); | |
202 | static int moxa_tiocmget(struct tty_struct *tty, struct file *file); | |
203 | static int moxa_tiocmset(struct tty_struct *tty, struct file *file, | |
204 | unsigned int set, unsigned int clear); | |
205 | static void moxa_poll(unsigned long); | |
db1acaa6 | 206 | static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); |
6f56b658 | 207 | static int moxa_block_till_ready(struct tty_struct *, struct file *, |
8f8ecbad | 208 | struct moxa_port *); |
6f56b658 JS |
209 | static void moxa_setup_empty_event(struct tty_struct *); |
210 | static void moxa_check_xmit_empty(unsigned long); | |
211 | static void moxa_shut_down(struct moxa_port *); | |
212 | static void moxa_receive_data(struct moxa_port *); | |
1da177e4 LT |
213 | /* |
214 | * moxa board interface functions: | |
215 | */ | |
b4173f45 | 216 | static int MoxaDriverIoctl(struct tty_struct *, unsigned int, unsigned long); |
1da177e4 | 217 | static int MoxaDriverPoll(void); |
b4173f45 JS |
218 | static void MoxaPortEnable(struct moxa_port *); |
219 | static void MoxaPortDisable(struct moxa_port *); | |
220 | static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); | |
221 | static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); | |
222 | static void MoxaPortLineCtrl(struct moxa_port *, int, int); | |
223 | static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); | |
224 | static int MoxaPortLineStatus(struct moxa_port *); | |
225 | static int MoxaPortDCDChange(struct moxa_port *); | |
226 | static int MoxaPortDCDON(struct moxa_port *); | |
227 | static void MoxaPortFlushData(struct moxa_port *, int); | |
228 | static int MoxaPortWriteData(struct moxa_port *, unsigned char *, int); | |
229 | static int MoxaPortReadData(struct moxa_port *, struct tty_struct *tty); | |
230 | static int MoxaPortTxQueue(struct moxa_port *); | |
231 | static int MoxaPortRxQueue(struct moxa_port *); | |
232 | static int MoxaPortTxFree(struct moxa_port *); | |
233 | static void MoxaPortTxDisable(struct moxa_port *); | |
234 | static void MoxaPortTxEnable(struct moxa_port *); | |
235 | static int MoxaPortResetBrkCnt(struct moxa_port *); | |
236 | static void MoxaPortSendBreak(struct moxa_port *, int); | |
8f8ecbad JS |
237 | static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); |
238 | static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); | |
b4173f45 | 239 | static void MoxaSetFifo(struct moxa_port *port, int enable); |
1da177e4 | 240 | |
b68e31d0 | 241 | static const struct tty_operations moxa_ops = { |
1da177e4 LT |
242 | .open = moxa_open, |
243 | .close = moxa_close, | |
244 | .write = moxa_write, | |
245 | .write_room = moxa_write_room, | |
246 | .flush_buffer = moxa_flush_buffer, | |
247 | .chars_in_buffer = moxa_chars_in_buffer, | |
248 | .flush_chars = moxa_flush_chars, | |
249 | .put_char = moxa_put_char, | |
250 | .ioctl = moxa_ioctl, | |
251 | .throttle = moxa_throttle, | |
252 | .unthrottle = moxa_unthrottle, | |
253 | .set_termios = moxa_set_termios, | |
254 | .stop = moxa_stop, | |
255 | .start = moxa_start, | |
256 | .hangup = moxa_hangup, | |
257 | .tiocmget = moxa_tiocmget, | |
258 | .tiocmset = moxa_tiocmset, | |
259 | }; | |
260 | ||
aa7e5221 | 261 | static struct tty_driver *moxaDriver; |
aa7e5221 | 262 | static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); |
34af946a | 263 | static DEFINE_SPINLOCK(moxa_lock); |
33f0f88f | 264 | |
03718234 JS |
265 | static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) |
266 | { | |
267 | switch (brd->boardType) { | |
268 | case MOXA_BOARD_C218_ISA: | |
269 | case MOXA_BOARD_C218_PCI: | |
270 | if (model != 1) | |
271 | goto err; | |
272 | break; | |
273 | case MOXA_BOARD_CP204J: | |
274 | if (model != 3) | |
275 | goto err; | |
276 | break; | |
277 | default: | |
278 | if (model != 2) | |
279 | goto err; | |
280 | break; | |
281 | } | |
282 | return 0; | |
283 | err: | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
287 | static int moxa_check_fw(const void *ptr) | |
288 | { | |
289 | const __le16 *lptr = ptr; | |
290 | ||
291 | if (*lptr != cpu_to_le16(0x7980)) | |
292 | return -EINVAL; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, | |
298 | size_t len) | |
299 | { | |
300 | void __iomem *baseAddr = brd->basemem; | |
301 | u16 tmp; | |
302 | ||
303 | writeb(HW_reset, baseAddr + Control_reg); /* reset */ | |
304 | msleep(10); | |
305 | memset_io(baseAddr, 0, 4096); | |
306 | memcpy_toio(baseAddr, buf, len); /* download BIOS */ | |
307 | writeb(0, baseAddr + Control_reg); /* restart */ | |
308 | ||
309 | msleep(2000); | |
310 | ||
311 | switch (brd->boardType) { | |
312 | case MOXA_BOARD_C218_ISA: | |
313 | case MOXA_BOARD_C218_PCI: | |
314 | tmp = readw(baseAddr + C218_key); | |
315 | if (tmp != C218_KeyCode) | |
316 | goto err; | |
317 | break; | |
318 | case MOXA_BOARD_CP204J: | |
319 | tmp = readw(baseAddr + C218_key); | |
320 | if (tmp != CP204J_KeyCode) | |
321 | goto err; | |
322 | break; | |
323 | default: | |
324 | tmp = readw(baseAddr + C320_key); | |
325 | if (tmp != C320_KeyCode) | |
326 | goto err; | |
327 | tmp = readw(baseAddr + C320_status); | |
328 | if (tmp != STS_init) { | |
329 | printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic " | |
330 | "module not found\n"); | |
331 | return -EIO; | |
332 | } | |
333 | break; | |
334 | } | |
335 | ||
336 | return 0; | |
337 | err: | |
338 | printk(KERN_ERR "moxa: bios upload failed -- board not found\n"); | |
339 | return -EIO; | |
340 | } | |
341 | ||
342 | static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, | |
343 | size_t len) | |
344 | { | |
345 | void __iomem *baseAddr = brd->basemem; | |
346 | ||
347 | if (len < 7168) { | |
348 | printk(KERN_ERR "moxa: invalid 320 bios -- too short\n"); | |
349 | return -EINVAL; | |
350 | } | |
351 | ||
352 | writew(len - 7168 - 2, baseAddr + C320bapi_len); | |
353 | writeb(1, baseAddr + Control_reg); /* Select Page 1 */ | |
354 | memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); | |
355 | writeb(2, baseAddr + Control_reg); /* Select Page 2 */ | |
356 | memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
5292bcd3 | 361 | static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr, |
03718234 JS |
362 | size_t len) |
363 | { | |
364 | void __iomem *baseAddr = brd->basemem; | |
365 | const u16 *uptr = ptr; | |
366 | size_t wlen, len2, j; | |
5292bcd3 JS |
367 | unsigned long key, loadbuf, loadlen, checksum, checksum_ok; |
368 | unsigned int i, retry, c320; | |
03718234 JS |
369 | u16 usum, keycode; |
370 | ||
5292bcd3 JS |
371 | c320 = brd->boardType == MOXA_BOARD_C320_PCI || |
372 | brd->boardType == MOXA_BOARD_C320_ISA; | |
373 | keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : | |
374 | C218_KeyCode; | |
03718234 | 375 | |
5292bcd3 JS |
376 | switch (brd->boardType) { |
377 | case MOXA_BOARD_CP204J: | |
378 | case MOXA_BOARD_C218_ISA: | |
379 | case MOXA_BOARD_C218_PCI: | |
380 | key = C218_key; | |
381 | loadbuf = C218_LoadBuf; | |
382 | loadlen = C218DLoad_len; | |
383 | checksum = C218check_sum; | |
384 | checksum_ok = C218chksum_ok; | |
385 | break; | |
386 | default: | |
387 | key = C320_key; | |
388 | keycode = C320_KeyCode; | |
389 | loadbuf = C320_LoadBuf; | |
390 | loadlen = C320DLoad_len; | |
391 | checksum = C320check_sum; | |
392 | checksum_ok = C320chksum_ok; | |
393 | break; | |
03718234 | 394 | } |
03718234 JS |
395 | |
396 | usum = 0; | |
397 | wlen = len >> 1; | |
398 | for (i = 0; i < wlen; i++) | |
399 | usum += le16_to_cpu(uptr[i]); | |
400 | retry = 0; | |
401 | do { | |
402 | wlen = len >> 1; | |
403 | j = 0; | |
404 | while (wlen) { | |
405 | len2 = (wlen > 2048) ? 2048 : wlen; | |
406 | wlen -= len2; | |
5292bcd3 | 407 | memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1); |
03718234 | 408 | j += len2 << 1; |
5292bcd3 JS |
409 | |
410 | writew(len2, baseAddr + loadlen); | |
411 | writew(0, baseAddr + key); | |
412 | for (i = 0; i < 100; i++) { | |
413 | if (readw(baseAddr + key) == keycode) | |
03718234 JS |
414 | break; |
415 | msleep(10); | |
416 | } | |
5292bcd3 | 417 | if (readw(baseAddr + key) != keycode) |
03718234 JS |
418 | return -EIO; |
419 | } | |
5292bcd3 JS |
420 | writew(0, baseAddr + loadlen); |
421 | writew(usum, baseAddr + checksum); | |
422 | writew(0, baseAddr + key); | |
423 | for (i = 0; i < 100; i++) { | |
424 | if (readw(baseAddr + key) == keycode) | |
03718234 JS |
425 | break; |
426 | msleep(10); | |
427 | } | |
428 | retry++; | |
5292bcd3 JS |
429 | } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); |
430 | if (readb(baseAddr + checksum_ok) != 1) | |
03718234 JS |
431 | return -EIO; |
432 | ||
5292bcd3 | 433 | writew(0, baseAddr + key); |
03718234 JS |
434 | for (i = 0; i < 600; i++) { |
435 | if (readw(baseAddr + Magic_no) == Magic_code) | |
436 | break; | |
437 | msleep(10); | |
438 | } | |
439 | if (readw(baseAddr + Magic_no) != Magic_code) | |
440 | return -EIO; | |
441 | ||
5292bcd3 JS |
442 | if (c320) { |
443 | if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ | |
444 | writew(0x3800, baseAddr + TMS320_PORT1); | |
445 | writew(0x3900, baseAddr + TMS320_PORT2); | |
446 | writew(28499, baseAddr + TMS320_CLOCK); | |
447 | } else { | |
448 | writew(0x3200, baseAddr + TMS320_PORT1); | |
449 | writew(0x3400, baseAddr + TMS320_PORT2); | |
450 | writew(19999, baseAddr + TMS320_CLOCK); | |
451 | } | |
03718234 JS |
452 | } |
453 | writew(1, baseAddr + Disable_IRQ); | |
454 | writew(0, baseAddr + Magic_no); | |
455 | for (i = 0; i < 500; i++) { | |
456 | if (readw(baseAddr + Magic_no) == Magic_code) | |
457 | break; | |
458 | msleep(10); | |
459 | } | |
460 | if (readw(baseAddr + Magic_no) != Magic_code) | |
461 | return -EIO; | |
462 | ||
5292bcd3 JS |
463 | if (c320) { |
464 | j = readw(baseAddr + Module_cnt); | |
465 | if (j <= 0) | |
466 | return -EIO; | |
467 | brd->numPorts = j * 8; | |
468 | writew(j, baseAddr + Module_no); | |
469 | writew(0, baseAddr + Magic_no); | |
470 | for (i = 0; i < 600; i++) { | |
471 | if (readw(baseAddr + Magic_no) == Magic_code) | |
472 | break; | |
473 | msleep(10); | |
474 | } | |
475 | if (readw(baseAddr + Magic_no) != Magic_code) | |
476 | return -EIO; | |
03718234 | 477 | } |
03718234 JS |
478 | brd->intNdx = baseAddr + IRQindex; |
479 | brd->intPend = baseAddr + IRQpending; | |
480 | brd->intTable = baseAddr + IRQtable; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, | |
486 | size_t len) | |
487 | { | |
488 | void __iomem *ofsAddr, *baseAddr = brd->basemem; | |
489 | struct moxa_port *port; | |
490 | int retval, i; | |
491 | ||
492 | if (len % 2) { | |
5292bcd3 | 493 | printk(KERN_ERR "moxa: bios length is not even\n"); |
03718234 JS |
494 | return -EINVAL; |
495 | } | |
496 | ||
5292bcd3 JS |
497 | retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ |
498 | if (retval) | |
499 | return retval; | |
500 | ||
03718234 JS |
501 | switch (brd->boardType) { |
502 | case MOXA_BOARD_C218_ISA: | |
503 | case MOXA_BOARD_C218_PCI: | |
504 | case MOXA_BOARD_CP204J: | |
03718234 JS |
505 | port = brd->ports; |
506 | for (i = 0; i < brd->numPorts; i++, port++) { | |
b4173f45 | 507 | port->board = brd; |
03718234 JS |
508 | port->DCDState = 0; |
509 | port->tableAddr = baseAddr + Extern_table + | |
510 | Extern_size * i; | |
511 | ofsAddr = port->tableAddr; | |
512 | writew(C218rx_mask, ofsAddr + RX_mask); | |
513 | writew(C218tx_mask, ofsAddr + TX_mask); | |
514 | writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); | |
515 | writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); | |
516 | ||
517 | writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); | |
518 | writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); | |
519 | ||
520 | } | |
521 | break; | |
522 | default: | |
03718234 JS |
523 | port = brd->ports; |
524 | for (i = 0; i < brd->numPorts; i++, port++) { | |
b4173f45 | 525 | port->board = brd; |
03718234 JS |
526 | port->DCDState = 0; |
527 | port->tableAddr = baseAddr + Extern_table + | |
528 | Extern_size * i; | |
529 | ofsAddr = port->tableAddr; | |
530 | switch (brd->numPorts) { | |
531 | case 8: | |
532 | writew(C320p8rx_mask, ofsAddr + RX_mask); | |
533 | writew(C320p8tx_mask, ofsAddr + TX_mask); | |
534 | writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); | |
535 | writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); | |
536 | writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); | |
537 | writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); | |
538 | ||
539 | break; | |
540 | case 16: | |
541 | writew(C320p16rx_mask, ofsAddr + RX_mask); | |
542 | writew(C320p16tx_mask, ofsAddr + TX_mask); | |
543 | writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); | |
544 | writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); | |
545 | writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); | |
546 | writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); | |
547 | break; | |
548 | ||
549 | case 24: | |
550 | writew(C320p24rx_mask, ofsAddr + RX_mask); | |
551 | writew(C320p24tx_mask, ofsAddr + TX_mask); | |
552 | writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); | |
553 | writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); | |
554 | writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); | |
555 | writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); | |
556 | break; | |
557 | case 32: | |
558 | writew(C320p32rx_mask, ofsAddr + RX_mask); | |
559 | writew(C320p32tx_mask, ofsAddr + TX_mask); | |
560 | writew(C320p32tx_ofs, ofsAddr + Ofs_txb); | |
561 | writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); | |
562 | writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); | |
563 | writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); | |
564 | writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); | |
565 | break; | |
566 | } | |
567 | } | |
568 | break; | |
569 | } | |
03718234 JS |
570 | return 0; |
571 | } | |
572 | ||
573 | static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) | |
574 | { | |
575 | void *ptr = fw->data; | |
576 | char rsn[64]; | |
577 | u16 lens[5]; | |
578 | size_t len; | |
579 | unsigned int a, lenp, lencnt; | |
580 | int ret = -EINVAL; | |
581 | struct { | |
582 | __le32 magic; /* 0x34303430 */ | |
583 | u8 reserved1[2]; | |
584 | u8 type; /* UNIX = 3 */ | |
585 | u8 model; /* C218T=1, C320T=2, CP204=3 */ | |
586 | u8 reserved2[8]; | |
587 | __le16 len[5]; | |
588 | } *hdr = ptr; | |
589 | ||
590 | BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); | |
591 | ||
592 | if (fw->size < MOXA_FW_HDRLEN) { | |
593 | strcpy(rsn, "too short (even header won't fit)"); | |
594 | goto err; | |
595 | } | |
596 | if (hdr->magic != cpu_to_le32(0x30343034)) { | |
597 | sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); | |
598 | goto err; | |
599 | } | |
600 | if (hdr->type != 3) { | |
601 | sprintf(rsn, "not for linux, type is %u", hdr->type); | |
602 | goto err; | |
603 | } | |
604 | if (moxa_check_fw_model(brd, hdr->model)) { | |
605 | sprintf(rsn, "not for this card, model is %u", hdr->model); | |
606 | goto err; | |
607 | } | |
608 | ||
609 | len = MOXA_FW_HDRLEN; | |
610 | lencnt = hdr->model == 2 ? 5 : 3; | |
611 | for (a = 0; a < ARRAY_SIZE(lens); a++) { | |
612 | lens[a] = le16_to_cpu(hdr->len[a]); | |
613 | if (lens[a] && len + lens[a] <= fw->size && | |
614 | moxa_check_fw(&fw->data[len])) | |
615 | printk(KERN_WARNING "moxa firmware: unexpected input " | |
616 | "at offset %u, but going on\n", (u32)len); | |
617 | if (!lens[a] && a < lencnt) { | |
618 | sprintf(rsn, "too few entries in fw file"); | |
619 | goto err; | |
620 | } | |
621 | len += lens[a]; | |
622 | } | |
623 | ||
624 | if (len != fw->size) { | |
625 | sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, | |
626 | (u32)len); | |
627 | goto err; | |
628 | } | |
629 | ||
630 | ptr += MOXA_FW_HDRLEN; | |
631 | lenp = 0; /* bios */ | |
632 | ||
633 | strcpy(rsn, "read above"); | |
634 | ||
635 | ret = moxa_load_bios(brd, ptr, lens[lenp]); | |
636 | if (ret) | |
637 | goto err; | |
638 | ||
639 | /* we skip the tty section (lens[1]), since we don't need it */ | |
640 | ptr += lens[lenp] + lens[lenp + 1]; | |
641 | lenp += 2; /* comm */ | |
642 | ||
643 | if (hdr->model == 2) { | |
644 | ret = moxa_load_320b(brd, ptr, lens[lenp]); | |
645 | if (ret) | |
646 | goto err; | |
647 | /* skip another tty */ | |
648 | ptr += lens[lenp] + lens[lenp + 1]; | |
649 | lenp += 2; | |
650 | } | |
651 | ||
652 | ret = moxa_load_code(brd, ptr, lens[lenp]); | |
653 | if (ret) | |
654 | goto err; | |
655 | ||
656 | return 0; | |
657 | err: | |
658 | printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); | |
659 | return ret; | |
660 | } | |
661 | ||
662 | static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) | |
663 | { | |
664 | const struct firmware *fw; | |
665 | const char *file; | |
810ab09b JS |
666 | struct moxa_port *p; |
667 | unsigned int i; | |
03718234 JS |
668 | int ret; |
669 | ||
810ab09b JS |
670 | brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), |
671 | GFP_KERNEL); | |
672 | if (brd->ports == NULL) { | |
673 | printk(KERN_ERR "cannot allocate memory for ports\n"); | |
674 | ret = -ENOMEM; | |
675 | goto err; | |
676 | } | |
677 | ||
678 | for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { | |
679 | p->type = PORT_16550A; | |
680 | p->close_delay = 5 * HZ / 10; | |
681 | p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; | |
682 | init_waitqueue_head(&p->open_wait); | |
683 | init_completion(&p->close_wait); | |
684 | ||
685 | setup_timer(&p->emptyTimer, moxa_check_xmit_empty, | |
686 | (unsigned long)p); | |
687 | } | |
688 | ||
03718234 JS |
689 | switch (brd->boardType) { |
690 | case MOXA_BOARD_C218_ISA: | |
691 | case MOXA_BOARD_C218_PCI: | |
692 | file = "c218tunx.cod"; | |
693 | break; | |
694 | case MOXA_BOARD_CP204J: | |
695 | file = "cp204unx.cod"; | |
696 | break; | |
697 | default: | |
698 | file = "c320tunx.cod"; | |
699 | break; | |
700 | } | |
701 | ||
702 | ret = request_firmware(&fw, file, dev); | |
703 | if (ret) { | |
704 | printk(KERN_ERR "request_firmware failed\n"); | |
810ab09b | 705 | goto err_free; |
03718234 JS |
706 | } |
707 | ||
708 | ret = moxa_load_fw(brd, fw); | |
709 | ||
710 | release_firmware(fw); | |
810ab09b JS |
711 | |
712 | if (ret) | |
713 | goto err_free; | |
714 | ||
715 | brd->ready = 1; | |
716 | ||
0bcc4caa JS |
717 | if (!timer_pending(&moxaTimer)) |
718 | mod_timer(&moxaTimer, jiffies + HZ / 50); | |
719 | ||
810ab09b JS |
720 | return 0; |
721 | err_free: | |
722 | kfree(brd->ports); | |
723 | err: | |
03718234 JS |
724 | return ret; |
725 | } | |
726 | ||
810ab09b JS |
727 | static void moxa_board_deinit(struct moxa_board_conf *brd) |
728 | { | |
729 | unsigned int i; | |
730 | ||
731 | brd->ready = 0; | |
732 | for (i = 0; i < MAX_PORTS_PER_BOARD; i++) | |
733 | del_timer_sync(&brd->ports[i].emptyTimer); | |
734 | ||
735 | iounmap(brd->basemem); | |
736 | brd->basemem = NULL; | |
737 | kfree(brd->ports); | |
738 | } | |
739 | ||
1da177e4 | 740 | #ifdef CONFIG_PCI |
9cde5bf0 JS |
741 | static int __devinit moxa_pci_probe(struct pci_dev *pdev, |
742 | const struct pci_device_id *ent) | |
1da177e4 | 743 | { |
9cde5bf0 JS |
744 | struct moxa_board_conf *board; |
745 | unsigned int i; | |
746 | int board_type = ent->driver_data; | |
747 | int retval; | |
748 | ||
749 | retval = pci_enable_device(pdev); | |
7aeb95da JS |
750 | if (retval) { |
751 | dev_err(&pdev->dev, "can't enable pci device\n"); | |
9cde5bf0 | 752 | goto err; |
7aeb95da | 753 | } |
9cde5bf0 JS |
754 | |
755 | for (i = 0; i < MAX_BOARDS; i++) | |
756 | if (moxa_boards[i].basemem == NULL) | |
757 | break; | |
758 | ||
759 | retval = -ENODEV; | |
760 | if (i >= MAX_BOARDS) { | |
7aeb95da | 761 | dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " |
9cde5bf0 JS |
762 | "found. Board is ignored.\n", MAX_BOARDS); |
763 | goto err; | |
764 | } | |
765 | ||
766 | board = &moxa_boards[i]; | |
e46a5e3f JS |
767 | |
768 | retval = pci_request_region(pdev, 2, "moxa-base"); | |
769 | if (retval) { | |
770 | dev_err(&pdev->dev, "can't request pci region 2\n"); | |
771 | goto err; | |
772 | } | |
773 | ||
774 | board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000); | |
7aeb95da JS |
775 | if (board->basemem == NULL) { |
776 | dev_err(&pdev->dev, "can't remap io space 2\n"); | |
e46a5e3f | 777 | goto err_reg; |
7aeb95da | 778 | } |
9cde5bf0 | 779 | |
1da177e4 LT |
780 | board->boardType = board_type; |
781 | switch (board_type) { | |
782 | case MOXA_BOARD_C218_ISA: | |
783 | case MOXA_BOARD_C218_PCI: | |
784 | board->numPorts = 8; | |
785 | break; | |
786 | ||
787 | case MOXA_BOARD_CP204J: | |
788 | board->numPorts = 4; | |
789 | break; | |
790 | default: | |
791 | board->numPorts = 0; | |
792 | break; | |
793 | } | |
794 | board->busType = MOXA_BUS_TYPE_PCI; | |
a784bf7c | 795 | |
03718234 JS |
796 | retval = moxa_init_board(board, &pdev->dev); |
797 | if (retval) | |
798 | goto err_base; | |
799 | ||
9cde5bf0 | 800 | pci_set_drvdata(pdev, board); |
1da177e4 LT |
801 | |
802 | return (0); | |
03718234 JS |
803 | err_base: |
804 | iounmap(board->basemem); | |
805 | board->basemem = NULL; | |
e46a5e3f JS |
806 | err_reg: |
807 | pci_release_region(pdev, 2); | |
9cde5bf0 JS |
808 | err: |
809 | return retval; | |
810 | } | |
811 | ||
812 | static void __devexit moxa_pci_remove(struct pci_dev *pdev) | |
813 | { | |
814 | struct moxa_board_conf *brd = pci_get_drvdata(pdev); | |
815 | ||
810ab09b JS |
816 | moxa_board_deinit(brd); |
817 | ||
e46a5e3f | 818 | pci_release_region(pdev, 2); |
1da177e4 | 819 | } |
a784bf7c JS |
820 | |
821 | static struct pci_driver moxa_pci_driver = { | |
822 | .name = "moxa", | |
823 | .id_table = moxa_pcibrds, | |
824 | .probe = moxa_pci_probe, | |
825 | .remove = __devexit_p(moxa_pci_remove) | |
826 | }; | |
1da177e4 LT |
827 | #endif /* CONFIG_PCI */ |
828 | ||
829 | static int __init moxa_init(void) | |
830 | { | |
810ab09b | 831 | unsigned int isabrds = 0; |
d353eca4 | 832 | int retval = 0; |
1da177e4 | 833 | |
7aeb95da JS |
834 | printk(KERN_INFO "MOXA Intellio family driver version %s\n", |
835 | MOXA_VERSION); | |
1da177e4 LT |
836 | moxaDriver = alloc_tty_driver(MAX_PORTS + 1); |
837 | if (!moxaDriver) | |
838 | return -ENOMEM; | |
839 | ||
1da177e4 | 840 | moxaDriver->owner = THIS_MODULE; |
9b4e3b13 | 841 | moxaDriver->name = "ttyMX"; |
1da177e4 LT |
842 | moxaDriver->major = ttymajor; |
843 | moxaDriver->minor_start = 0; | |
844 | moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; | |
845 | moxaDriver->subtype = SERIAL_TYPE_NORMAL; | |
846 | moxaDriver->init_termios = tty_std_termios; | |
1da177e4 | 847 | moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; |
606d099c AC |
848 | moxaDriver->init_termios.c_ispeed = 9600; |
849 | moxaDriver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
850 | moxaDriver->flags = TTY_DRIVER_REAL_RAW; |
851 | tty_set_operations(moxaDriver, &moxa_ops); | |
852 | ||
7aeb95da | 853 | pr_debug("Moxa tty devices major number = %d\n", ttymajor); |
1da177e4 LT |
854 | |
855 | if (tty_register_driver(moxaDriver)) { | |
856 | printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n"); | |
857 | put_tty_driver(moxaDriver); | |
858 | return -1; | |
859 | } | |
1da177e4 | 860 | |
d353eca4 | 861 | /* Find the boards defined from module args. */ |
1da177e4 | 862 | #ifdef MODULE |
d353eca4 JS |
863 | { |
864 | struct moxa_board_conf *brd = moxa_boards; | |
810ab09b | 865 | unsigned int i; |
1da177e4 | 866 | for (i = 0; i < MAX_BOARDS; i++) { |
d353eca4 JS |
867 | if (!baseaddr[i]) |
868 | break; | |
869 | if (type[i] == MOXA_BOARD_C218_ISA || | |
870 | type[i] == MOXA_BOARD_C320_ISA) { | |
7aeb95da | 871 | pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", |
d353eca4 JS |
872 | isabrds + 1, moxa_brdname[type[i] - 1], |
873 | baseaddr[i]); | |
874 | brd->boardType = type[i]; | |
875 | brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : | |
876 | numports[i]; | |
877 | brd->busType = MOXA_BUS_TYPE_ISA; | |
878 | brd->basemem = ioremap(baseaddr[i], 0x4000); | |
879 | if (!brd->basemem) { | |
880 | printk(KERN_ERR "moxa: can't remap %lx\n", | |
881 | baseaddr[i]); | |
1da177e4 LT |
882 | continue; |
883 | } | |
03718234 JS |
884 | if (moxa_init_board(brd, NULL)) { |
885 | iounmap(brd->basemem); | |
886 | brd->basemem = NULL; | |
887 | continue; | |
888 | } | |
d353eca4 JS |
889 | |
890 | brd++; | |
891 | isabrds++; | |
1da177e4 LT |
892 | } |
893 | } | |
d353eca4 | 894 | } |
1da177e4 | 895 | #endif |
a784bf7c | 896 | |
1da177e4 | 897 | #ifdef CONFIG_PCI |
a784bf7c JS |
898 | retval = pci_register_driver(&moxa_pci_driver); |
899 | if (retval) { | |
900 | printk(KERN_ERR "Can't register moxa pci driver!\n"); | |
d353eca4 | 901 | if (isabrds) |
a784bf7c | 902 | retval = 0; |
1da177e4 LT |
903 | } |
904 | #endif | |
a784bf7c | 905 | |
a784bf7c | 906 | return retval; |
1da177e4 LT |
907 | } |
908 | ||
909 | static void __exit moxa_exit(void) | |
910 | { | |
911 | int i; | |
912 | ||
c251ae0d | 913 | del_timer_sync(&moxaTimer); |
1da177e4 | 914 | |
1da177e4 | 915 | if (tty_unregister_driver(moxaDriver)) |
7aeb95da JS |
916 | printk(KERN_ERR "Couldn't unregister MOXA Intellio family " |
917 | "serial driver\n"); | |
1da177e4 | 918 | put_tty_driver(moxaDriver); |
86fbf148 | 919 | |
9cde5bf0 | 920 | #ifdef CONFIG_PCI |
a784bf7c | 921 | pci_unregister_driver(&moxa_pci_driver); |
9cde5bf0 | 922 | #endif |
a784bf7c | 923 | |
810ab09b JS |
924 | for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ |
925 | if (moxa_boards[i].ready) | |
926 | moxa_board_deinit(&moxa_boards[i]); | |
1da177e4 LT |
927 | } |
928 | ||
929 | module_init(moxa_init); | |
930 | module_exit(moxa_exit); | |
931 | ||
1da177e4 LT |
932 | static int moxa_open(struct tty_struct *tty, struct file *filp) |
933 | { | |
810ab09b | 934 | struct moxa_board_conf *brd; |
8f8ecbad | 935 | struct moxa_port *ch; |
1da177e4 LT |
936 | int port; |
937 | int retval; | |
1da177e4 | 938 | |
11324edd | 939 | port = tty->index; |
1da177e4 LT |
940 | if (port == MAX_PORTS) { |
941 | return (0); | |
942 | } | |
810ab09b JS |
943 | brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; |
944 | if (!brd->ready) | |
945 | return -ENODEV; | |
1da177e4 | 946 | |
810ab09b | 947 | ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; |
1da177e4 LT |
948 | ch->count++; |
949 | tty->driver_data = ch; | |
950 | ch->tty = tty; | |
951 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) { | |
952 | ch->statusflags = 0; | |
db1acaa6 | 953 | moxa_set_tty_param(tty, tty->termios); |
b4173f45 JS |
954 | MoxaPortLineCtrl(ch, 1, 1); |
955 | MoxaPortEnable(ch); | |
1da177e4 LT |
956 | ch->asyncflags |= ASYNC_INITIALIZED; |
957 | } | |
6f56b658 | 958 | retval = moxa_block_till_ready(tty, filp, ch); |
1da177e4 LT |
959 | |
960 | moxa_unthrottle(tty); | |
961 | ||
962 | if (ch->type == PORT_16550A) { | |
b4173f45 | 963 | MoxaSetFifo(ch, 1); |
1da177e4 | 964 | } else { |
b4173f45 | 965 | MoxaSetFifo(ch, 0); |
1da177e4 LT |
966 | } |
967 | ||
968 | return (retval); | |
969 | } | |
970 | ||
971 | static void moxa_close(struct tty_struct *tty, struct file *filp) | |
972 | { | |
8f8ecbad | 973 | struct moxa_port *ch; |
1da177e4 LT |
974 | int port; |
975 | ||
11324edd | 976 | port = tty->index; |
1da177e4 LT |
977 | if (port == MAX_PORTS) { |
978 | return; | |
979 | } | |
1da177e4 LT |
980 | if (tty->driver_data == NULL) { |
981 | return; | |
982 | } | |
983 | if (tty_hung_up_p(filp)) { | |
984 | return; | |
985 | } | |
8f8ecbad | 986 | ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
987 | |
988 | if ((tty->count == 1) && (ch->count != 1)) { | |
7aeb95da JS |
989 | printk(KERN_WARNING "moxa_close: bad serial port count; " |
990 | "tty->count is 1, ch->count is %d\n", ch->count); | |
1da177e4 LT |
991 | ch->count = 1; |
992 | } | |
993 | if (--ch->count < 0) { | |
7aeb95da JS |
994 | printk(KERN_WARNING "moxa_close: bad serial port count, " |
995 | "device=%s\n", tty->name); | |
1da177e4 LT |
996 | ch->count = 0; |
997 | } | |
998 | if (ch->count) { | |
999 | return; | |
1000 | } | |
1001 | ch->asyncflags |= ASYNC_CLOSING; | |
1002 | ||
1003 | ch->cflag = tty->termios->c_cflag; | |
1004 | if (ch->asyncflags & ASYNC_INITIALIZED) { | |
6f56b658 | 1005 | moxa_setup_empty_event(tty); |
1da177e4 | 1006 | tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */ |
b4173f45 | 1007 | del_timer_sync(&ch->emptyTimer); |
1da177e4 | 1008 | } |
6f56b658 | 1009 | moxa_shut_down(ch); |
b4173f45 | 1010 | MoxaPortFlushData(ch, 2); |
1da177e4 LT |
1011 | |
1012 | if (tty->driver->flush_buffer) | |
1013 | tty->driver->flush_buffer(tty); | |
1014 | tty_ldisc_flush(tty); | |
1015 | ||
1016 | tty->closing = 0; | |
1da177e4 LT |
1017 | ch->tty = NULL; |
1018 | if (ch->blocked_open) { | |
1019 | if (ch->close_delay) { | |
1020 | msleep_interruptible(jiffies_to_msecs(ch->close_delay)); | |
1021 | } | |
1022 | wake_up_interruptible(&ch->open_wait); | |
1023 | } | |
1024 | ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); | |
95e07914 | 1025 | complete_all(&ch->close_wait); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | static int moxa_write(struct tty_struct *tty, | |
1029 | const unsigned char *buf, int count) | |
1030 | { | |
b4173f45 | 1031 | struct moxa_port *ch = tty->driver_data; |
1da177e4 | 1032 | unsigned long flags; |
b4173f45 | 1033 | int len; |
1da177e4 | 1034 | |
1da177e4 | 1035 | if (ch == NULL) |
b4173f45 | 1036 | return 0; |
33f0f88f AC |
1037 | |
1038 | spin_lock_irqsave(&moxa_lock, flags); | |
b4173f45 | 1039 | len = MoxaPortWriteData(ch, (unsigned char *) buf, count); |
33f0f88f | 1040 | spin_unlock_irqrestore(&moxa_lock, flags); |
1da177e4 LT |
1041 | |
1042 | /********************************************* | |
1043 | if ( !(ch->statusflags & LOWWAIT) && | |
1044 | ((len != count) || (MoxaPortTxFree(port) <= 100)) ) | |
1045 | ************************************************/ | |
1046 | ch->statusflags |= LOWWAIT; | |
1047 | return (len); | |
1048 | } | |
1049 | ||
1050 | static int moxa_write_room(struct tty_struct *tty) | |
1051 | { | |
8f8ecbad | 1052 | struct moxa_port *ch; |
1da177e4 LT |
1053 | |
1054 | if (tty->stopped) | |
1055 | return (0); | |
b4173f45 | 1056 | ch = tty->driver_data; |
1da177e4 LT |
1057 | if (ch == NULL) |
1058 | return (0); | |
b4173f45 | 1059 | return MoxaPortTxFree(ch); |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | static void moxa_flush_buffer(struct tty_struct *tty) | |
1063 | { | |
b4173f45 | 1064 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1065 | |
1066 | if (ch == NULL) | |
1067 | return; | |
b4173f45 | 1068 | MoxaPortFlushData(ch, 1); |
1da177e4 LT |
1069 | tty_wakeup(tty); |
1070 | } | |
1071 | ||
1072 | static int moxa_chars_in_buffer(struct tty_struct *tty) | |
1073 | { | |
b4173f45 | 1074 | struct moxa_port *ch = tty->driver_data; |
1da177e4 | 1075 | int chars; |
1da177e4 LT |
1076 | |
1077 | /* | |
1078 | * Sigh...I have to check if driver_data is NULL here, because | |
1079 | * if an open() fails, the TTY subsystem eventually calls | |
1080 | * tty_wait_until_sent(), which calls the driver's chars_in_buffer() | |
1081 | * routine. And since the open() failed, we return 0 here. TDJ | |
1082 | */ | |
1083 | if (ch == NULL) | |
1084 | return (0); | |
b4173f45 | 1085 | chars = MoxaPortTxQueue(ch); |
1da177e4 LT |
1086 | if (chars) { |
1087 | /* | |
1088 | * Make it possible to wakeup anything waiting for output | |
1089 | * in tty_ioctl.c, etc. | |
1090 | */ | |
1091 | if (!(ch->statusflags & EMPTYWAIT)) | |
6f56b658 | 1092 | moxa_setup_empty_event(tty); |
1da177e4 LT |
1093 | } |
1094 | return (chars); | |
1095 | } | |
1096 | ||
1097 | static void moxa_flush_chars(struct tty_struct *tty) | |
1098 | { | |
1099 | /* | |
1100 | * Don't think I need this, because this is called to empty the TX | |
1101 | * buffer for the 16450, 16550, etc. | |
1102 | */ | |
1103 | } | |
1104 | ||
1105 | static void moxa_put_char(struct tty_struct *tty, unsigned char c) | |
1106 | { | |
b4173f45 | 1107 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1108 | unsigned long flags; |
1109 | ||
1da177e4 LT |
1110 | if (ch == NULL) |
1111 | return; | |
33f0f88f | 1112 | spin_lock_irqsave(&moxa_lock, flags); |
b4173f45 | 1113 | MoxaPortWriteData(ch, &c, 1); |
33f0f88f | 1114 | spin_unlock_irqrestore(&moxa_lock, flags); |
1da177e4 LT |
1115 | /************************************************ |
1116 | if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) ) | |
1117 | *************************************************/ | |
1118 | ch->statusflags |= LOWWAIT; | |
1119 | } | |
1120 | ||
1121 | static int moxa_tiocmget(struct tty_struct *tty, struct file *file) | |
1122 | { | |
b4173f45 | 1123 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1124 | int flag = 0, dtr, rts; |
1125 | ||
b4173f45 | 1126 | if ((tty->index != MAX_PORTS) && (!ch)) |
1da177e4 LT |
1127 | return (-EINVAL); |
1128 | ||
b4173f45 | 1129 | MoxaPortGetLineOut(ch, &dtr, &rts); |
1da177e4 LT |
1130 | if (dtr) |
1131 | flag |= TIOCM_DTR; | |
1132 | if (rts) | |
1133 | flag |= TIOCM_RTS; | |
b4173f45 | 1134 | dtr = MoxaPortLineStatus(ch); |
1da177e4 LT |
1135 | if (dtr & 1) |
1136 | flag |= TIOCM_CTS; | |
1137 | if (dtr & 2) | |
1138 | flag |= TIOCM_DSR; | |
1139 | if (dtr & 4) | |
1140 | flag |= TIOCM_CD; | |
1141 | return flag; | |
1142 | } | |
1143 | ||
1144 | static int moxa_tiocmset(struct tty_struct *tty, struct file *file, | |
1145 | unsigned int set, unsigned int clear) | |
1146 | { | |
b4173f45 | 1147 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1148 | int port; |
1149 | int dtr, rts; | |
1150 | ||
11324edd | 1151 | port = tty->index; |
1da177e4 LT |
1152 | if ((port != MAX_PORTS) && (!ch)) |
1153 | return (-EINVAL); | |
1154 | ||
b4173f45 | 1155 | MoxaPortGetLineOut(ch, &dtr, &rts); |
1da177e4 LT |
1156 | if (set & TIOCM_RTS) |
1157 | rts = 1; | |
1158 | if (set & TIOCM_DTR) | |
1159 | dtr = 1; | |
1160 | if (clear & TIOCM_RTS) | |
1161 | rts = 0; | |
1162 | if (clear & TIOCM_DTR) | |
1163 | dtr = 0; | |
b4173f45 | 1164 | MoxaPortLineCtrl(ch, dtr, rts); |
1da177e4 LT |
1165 | return 0; |
1166 | } | |
1167 | ||
1168 | static int moxa_ioctl(struct tty_struct *tty, struct file *file, | |
1169 | unsigned int cmd, unsigned long arg) | |
1170 | { | |
b4173f45 | 1171 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1172 | register int port; |
1173 | void __user *argp = (void __user *)arg; | |
1174 | int retval; | |
1175 | ||
11324edd | 1176 | port = tty->index; |
1da177e4 LT |
1177 | if ((port != MAX_PORTS) && (!ch)) |
1178 | return (-EINVAL); | |
1179 | ||
1180 | switch (cmd) { | |
1181 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1182 | retval = tty_check_change(tty); | |
1183 | if (retval) | |
1184 | return (retval); | |
6f56b658 | 1185 | moxa_setup_empty_event(tty); |
1da177e4 LT |
1186 | tty_wait_until_sent(tty, 0); |
1187 | if (!arg) | |
b4173f45 | 1188 | MoxaPortSendBreak(ch, 0); |
1da177e4 LT |
1189 | return (0); |
1190 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1191 | retval = tty_check_change(tty); | |
1192 | if (retval) | |
1193 | return (retval); | |
6f56b658 | 1194 | moxa_setup_empty_event(tty); |
1da177e4 | 1195 | tty_wait_until_sent(tty, 0); |
b4173f45 | 1196 | MoxaPortSendBreak(ch, arg); |
1da177e4 LT |
1197 | return (0); |
1198 | case TIOCGSOFTCAR: | |
9e9fc313 | 1199 | return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)argp); |
1da177e4 | 1200 | case TIOCSSOFTCAR: |
9e9fc313 | 1201 | if (get_user(retval, (int __user *)argp)) |
1da177e4 LT |
1202 | return -EFAULT; |
1203 | arg = retval; | |
1204 | tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | | |
1205 | (arg ? CLOCAL : 0)); | |
1206 | if (C_CLOCAL(tty)) | |
1207 | ch->asyncflags &= ~ASYNC_CHECK_CD; | |
1208 | else | |
1209 | ch->asyncflags |= ASYNC_CHECK_CD; | |
1210 | return (0); | |
1211 | case TIOCGSERIAL: | |
1212 | return moxa_get_serial_info(ch, argp); | |
1213 | ||
1214 | case TIOCSSERIAL: | |
1215 | return moxa_set_serial_info(ch, argp); | |
1216 | default: | |
b4173f45 | 1217 | retval = MoxaDriverIoctl(tty, cmd, arg); |
1da177e4 LT |
1218 | } |
1219 | return (retval); | |
1220 | } | |
1221 | ||
1222 | static void moxa_throttle(struct tty_struct *tty) | |
1223 | { | |
8f8ecbad | 1224 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1225 | |
1226 | ch->statusflags |= THROTTLE; | |
1227 | } | |
1228 | ||
1229 | static void moxa_unthrottle(struct tty_struct *tty) | |
1230 | { | |
8f8ecbad | 1231 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1232 | |
1233 | ch->statusflags &= ~THROTTLE; | |
1234 | } | |
1235 | ||
1236 | static void moxa_set_termios(struct tty_struct *tty, | |
606d099c | 1237 | struct ktermios *old_termios) |
1da177e4 | 1238 | { |
8f8ecbad | 1239 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1240 | |
1241 | if (ch == NULL) | |
1242 | return; | |
db1acaa6 | 1243 | moxa_set_tty_param(tty, old_termios); |
1da177e4 LT |
1244 | if (!(old_termios->c_cflag & CLOCAL) && |
1245 | (tty->termios->c_cflag & CLOCAL)) | |
1246 | wake_up_interruptible(&ch->open_wait); | |
1247 | } | |
1248 | ||
1249 | static void moxa_stop(struct tty_struct *tty) | |
1250 | { | |
8f8ecbad | 1251 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1252 | |
1253 | if (ch == NULL) | |
1254 | return; | |
b4173f45 | 1255 | MoxaPortTxDisable(ch); |
1da177e4 LT |
1256 | ch->statusflags |= TXSTOPPED; |
1257 | } | |
1258 | ||
1259 | ||
1260 | static void moxa_start(struct tty_struct *tty) | |
1261 | { | |
8f8ecbad | 1262 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1263 | |
1264 | if (ch == NULL) | |
1265 | return; | |
1266 | ||
1267 | if (!(ch->statusflags & TXSTOPPED)) | |
1268 | return; | |
1269 | ||
b4173f45 | 1270 | MoxaPortTxEnable(ch); |
1da177e4 LT |
1271 | ch->statusflags &= ~TXSTOPPED; |
1272 | } | |
1273 | ||
1274 | static void moxa_hangup(struct tty_struct *tty) | |
1275 | { | |
8f8ecbad | 1276 | struct moxa_port *ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1277 | |
1278 | moxa_flush_buffer(tty); | |
6f56b658 | 1279 | moxa_shut_down(ch); |
1da177e4 LT |
1280 | ch->count = 0; |
1281 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | |
1282 | ch->tty = NULL; | |
1283 | wake_up_interruptible(&ch->open_wait); | |
1284 | } | |
1285 | ||
1286 | static void moxa_poll(unsigned long ignored) | |
1287 | { | |
8f8ecbad | 1288 | struct moxa_port *ch; |
0bcc4caa JS |
1289 | struct tty_struct *tty; |
1290 | unsigned int card; | |
1291 | int i; | |
1da177e4 | 1292 | |
1da177e4 LT |
1293 | del_timer(&moxaTimer); |
1294 | ||
1295 | if (MoxaDriverPoll() < 0) { | |
aa7e5221 | 1296 | mod_timer(&moxaTimer, jiffies + HZ / 50); |
1da177e4 LT |
1297 | return; |
1298 | } | |
0bcc4caa | 1299 | |
1da177e4 | 1300 | for (card = 0; card < MAX_BOARDS; card++) { |
0bcc4caa | 1301 | if (!moxa_boards[card].ready) |
1da177e4 | 1302 | continue; |
810ab09b | 1303 | ch = moxa_boards[card].ports; |
0bcc4caa | 1304 | for (i = 0; i < moxa_boards[card].numPorts; i++, ch++) { |
1da177e4 LT |
1305 | if ((ch->asyncflags & ASYNC_INITIALIZED) == 0) |
1306 | continue; | |
1307 | if (!(ch->statusflags & THROTTLE) && | |
b4173f45 | 1308 | (MoxaPortRxQueue(ch) > 0)) |
6f56b658 | 1309 | moxa_receive_data(ch); |
0bcc4caa JS |
1310 | tty = ch->tty; |
1311 | if (tty == NULL) | |
1da177e4 LT |
1312 | continue; |
1313 | if (ch->statusflags & LOWWAIT) { | |
b4173f45 | 1314 | if (MoxaPortTxQueue(ch) <= WAKEUP_CHARS) { |
0bcc4caa | 1315 | if (!tty->stopped) { |
1da177e4 | 1316 | ch->statusflags &= ~LOWWAIT; |
0bcc4caa | 1317 | tty_wakeup(tty); |
1da177e4 LT |
1318 | } |
1319 | } | |
1320 | } | |
0bcc4caa JS |
1321 | if (!I_IGNBRK(tty) && (MoxaPortResetBrkCnt(ch) > 0)) { |
1322 | tty_insert_flip_char(tty, 0, TTY_BREAK); | |
1323 | tty_schedule_flip(tty); | |
1da177e4 | 1324 | } |
b4173f45 | 1325 | if (MoxaPortDCDChange(ch)) { |
1da177e4 | 1326 | if (ch->asyncflags & ASYNC_CHECK_CD) { |
b4173f45 | 1327 | if (MoxaPortDCDON(ch)) |
1da177e4 LT |
1328 | wake_up_interruptible(&ch->open_wait); |
1329 | else { | |
0bcc4caa | 1330 | tty_hangup(tty); |
ba196df3 JS |
1331 | wake_up_interruptible(&ch->open_wait); |
1332 | ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; | |
1da177e4 LT |
1333 | } |
1334 | } | |
1335 | } | |
1336 | } | |
1337 | } | |
1338 | ||
aa7e5221 | 1339 | mod_timer(&moxaTimer, jiffies + HZ / 50); |
1da177e4 LT |
1340 | } |
1341 | ||
1342 | /******************************************************************************/ | |
1343 | ||
db1acaa6 | 1344 | static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 1345 | { |
606d099c | 1346 | register struct ktermios *ts; |
8f8ecbad | 1347 | struct moxa_port *ch; |
db1acaa6 | 1348 | int rts, cts, txflow, rxflow, xany, baud; |
1da177e4 | 1349 | |
8f8ecbad | 1350 | ch = (struct moxa_port *) tty->driver_data; |
1da177e4 LT |
1351 | ts = tty->termios; |
1352 | if (ts->c_cflag & CLOCAL) | |
1353 | ch->asyncflags &= ~ASYNC_CHECK_CD; | |
1354 | else | |
1355 | ch->asyncflags |= ASYNC_CHECK_CD; | |
1356 | rts = cts = txflow = rxflow = xany = 0; | |
1357 | if (ts->c_cflag & CRTSCTS) | |
1358 | rts = cts = 1; | |
1359 | if (ts->c_iflag & IXON) | |
1360 | txflow = 1; | |
1361 | if (ts->c_iflag & IXOFF) | |
1362 | rxflow = 1; | |
1363 | if (ts->c_iflag & IXANY) | |
1364 | xany = 1; | |
db1acaa6 AC |
1365 | |
1366 | /* Clear the features we don't support */ | |
1367 | ts->c_cflag &= ~CMSPAR; | |
b4173f45 JS |
1368 | MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); |
1369 | baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty)); | |
db1acaa6 AC |
1370 | if (baud == -1) |
1371 | baud = tty_termios_baud_rate(old_termios); | |
1372 | /* Not put the baud rate into the termios data */ | |
1373 | tty_encode_baud_rate(tty, baud, baud); | |
1da177e4 LT |
1374 | } |
1375 | ||
6f56b658 | 1376 | static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp, |
8f8ecbad | 1377 | struct moxa_port *ch) |
1da177e4 LT |
1378 | { |
1379 | DECLARE_WAITQUEUE(wait,current); | |
1380 | unsigned long flags; | |
1381 | int retval; | |
1382 | int do_clocal = C_CLOCAL(tty); | |
1383 | ||
1384 | /* | |
1385 | * If the device is in the middle of being closed, then block | |
1386 | * until it's done, and then try again. | |
1387 | */ | |
1388 | if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) { | |
1389 | if (ch->asyncflags & ASYNC_CLOSING) | |
95e07914 | 1390 | wait_for_completion_interruptible(&ch->close_wait); |
1da177e4 LT |
1391 | #ifdef SERIAL_DO_RESTART |
1392 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
1393 | return (-EAGAIN); | |
1394 | else | |
1395 | return (-ERESTARTSYS); | |
1396 | #else | |
1397 | return (-EAGAIN); | |
1398 | #endif | |
1399 | } | |
1400 | /* | |
1401 | * If non-blocking mode is set, then make the check up front | |
1402 | * and then exit. | |
1403 | */ | |
1404 | if (filp->f_flags & O_NONBLOCK) { | |
1405 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; | |
1406 | return (0); | |
1407 | } | |
1408 | /* | |
1409 | * Block waiting for the carrier detect and the line to become free | |
1410 | */ | |
1411 | retval = 0; | |
1412 | add_wait_queue(&ch->open_wait, &wait); | |
7aeb95da | 1413 | pr_debug("block_til_ready before block: ttys%d, count = %d\n", |
b4173f45 | 1414 | tty->index, ch->count); |
33f0f88f | 1415 | spin_lock_irqsave(&moxa_lock, flags); |
1da177e4 LT |
1416 | if (!tty_hung_up_p(filp)) |
1417 | ch->count--; | |
1da177e4 | 1418 | ch->blocked_open++; |
33f0f88f AC |
1419 | spin_unlock_irqrestore(&moxa_lock, flags); |
1420 | ||
1da177e4 LT |
1421 | while (1) { |
1422 | set_current_state(TASK_INTERRUPTIBLE); | |
1423 | if (tty_hung_up_p(filp) || | |
1424 | !(ch->asyncflags & ASYNC_INITIALIZED)) { | |
1425 | #ifdef SERIAL_DO_RESTART | |
1426 | if (ch->asyncflags & ASYNC_HUP_NOTIFY) | |
1427 | retval = -EAGAIN; | |
1428 | else | |
1429 | retval = -ERESTARTSYS; | |
1430 | #else | |
1431 | retval = -EAGAIN; | |
1432 | #endif | |
1433 | break; | |
1434 | } | |
1435 | if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal || | |
b4173f45 | 1436 | MoxaPortDCDON(ch))) |
1da177e4 LT |
1437 | break; |
1438 | ||
1439 | if (signal_pending(current)) { | |
1440 | retval = -ERESTARTSYS; | |
1441 | break; | |
1442 | } | |
1443 | schedule(); | |
1444 | } | |
1445 | set_current_state(TASK_RUNNING); | |
1446 | remove_wait_queue(&ch->open_wait, &wait); | |
33f0f88f AC |
1447 | |
1448 | spin_lock_irqsave(&moxa_lock, flags); | |
1da177e4 LT |
1449 | if (!tty_hung_up_p(filp)) |
1450 | ch->count++; | |
1451 | ch->blocked_open--; | |
33f0f88f | 1452 | spin_unlock_irqrestore(&moxa_lock, flags); |
7aeb95da | 1453 | pr_debug("block_til_ready after blocking: ttys%d, count = %d\n", |
b4173f45 | 1454 | tty->index, ch->count); |
1da177e4 LT |
1455 | if (retval) |
1456 | return (retval); | |
33f0f88f | 1457 | /* FIXME: review to see if we need to use set_bit on these */ |
1da177e4 | 1458 | ch->asyncflags |= ASYNC_NORMAL_ACTIVE; |
33f0f88f | 1459 | return 0; |
1da177e4 LT |
1460 | } |
1461 | ||
6f56b658 | 1462 | static void moxa_setup_empty_event(struct tty_struct *tty) |
1da177e4 | 1463 | { |
8f8ecbad | 1464 | struct moxa_port *ch = tty->driver_data; |
1da177e4 LT |
1465 | unsigned long flags; |
1466 | ||
33f0f88f | 1467 | spin_lock_irqsave(&moxa_lock, flags); |
1da177e4 | 1468 | ch->statusflags |= EMPTYWAIT; |
b4173f45 | 1469 | mod_timer(&ch->emptyTimer, jiffies + HZ); |
33f0f88f | 1470 | spin_unlock_irqrestore(&moxa_lock, flags); |
1da177e4 LT |
1471 | } |
1472 | ||
6f56b658 | 1473 | static void moxa_check_xmit_empty(unsigned long data) |
1da177e4 | 1474 | { |
8f8ecbad | 1475 | struct moxa_port *ch; |
1da177e4 | 1476 | |
8f8ecbad | 1477 | ch = (struct moxa_port *) data; |
1da177e4 | 1478 | if (ch->tty && (ch->statusflags & EMPTYWAIT)) { |
b4173f45 | 1479 | if (MoxaPortTxQueue(ch) == 0) { |
1da177e4 LT |
1480 | ch->statusflags &= ~EMPTYWAIT; |
1481 | tty_wakeup(ch->tty); | |
1482 | return; | |
1483 | } | |
b4173f45 | 1484 | mod_timer(&ch->emptyTimer, round_jiffies(jiffies + HZ)); |
1da177e4 LT |
1485 | } else |
1486 | ch->statusflags &= ~EMPTYWAIT; | |
1487 | } | |
1488 | ||
6f56b658 | 1489 | static void moxa_shut_down(struct moxa_port *ch) |
1da177e4 LT |
1490 | { |
1491 | struct tty_struct *tp; | |
1492 | ||
1493 | if (!(ch->asyncflags & ASYNC_INITIALIZED)) | |
1494 | return; | |
1495 | ||
1496 | tp = ch->tty; | |
1497 | ||
b4173f45 | 1498 | MoxaPortDisable(ch); |
1da177e4 LT |
1499 | |
1500 | /* | |
1501 | * If we're a modem control device and HUPCL is on, drop RTS & DTR. | |
1502 | */ | |
1503 | if (tp->termios->c_cflag & HUPCL) | |
b4173f45 | 1504 | MoxaPortLineCtrl(ch, 0, 0); |
1da177e4 LT |
1505 | |
1506 | ch->asyncflags &= ~ASYNC_INITIALIZED; | |
1507 | } | |
1508 | ||
6f56b658 | 1509 | static void moxa_receive_data(struct moxa_port *ch) |
1da177e4 LT |
1510 | { |
1511 | struct tty_struct *tp; | |
606d099c | 1512 | struct ktermios *ts; |
1da177e4 LT |
1513 | unsigned long flags; |
1514 | ||
1515 | ts = NULL; | |
1516 | tp = ch->tty; | |
1517 | if (tp) | |
1518 | ts = tp->termios; | |
1519 | /************************************************** | |
03718234 JS |
1520 | if ( !tp || !ts || !(ts->c_cflag & CREAD) ) { |
1521 | *****************************************************/ | |
1522 | if (!tp || !ts) { | |
b4173f45 | 1523 | MoxaPortFlushData(ch, 0); |
03718234 JS |
1524 | return; |
1525 | } | |
1526 | spin_lock_irqsave(&moxa_lock, flags); | |
b4173f45 | 1527 | MoxaPortReadData(ch, tp); |
03718234 JS |
1528 | spin_unlock_irqrestore(&moxa_lock, flags); |
1529 | tty_schedule_flip(tp); | |
1530 | } | |
1da177e4 LT |
1531 | |
1532 | /* | |
1533 | * Query | |
1534 | */ | |
1da177e4 LT |
1535 | |
1536 | struct mon_str { | |
1537 | int tick; | |
1538 | int rxcnt[MAX_PORTS]; | |
1539 | int txcnt[MAX_PORTS]; | |
1540 | }; | |
1da177e4 LT |
1541 | |
1542 | #define DCD_changed 0x01 | |
1543 | #define DCD_oldstate 0x80 | |
1544 | ||
1da177e4 | 1545 | static int moxaLowWaterChk; |
9dff89cd | 1546 | static struct mon_str moxaLog; |
9fa372a8 | 1547 | static int moxaFuncTout = HZ / 2; |
1da177e4 | 1548 | |
1da177e4 | 1549 | static void moxafunc(void __iomem *, int, ushort); |
6f56b658 JS |
1550 | static void moxa_wait_finish(void __iomem *); |
1551 | static void moxa_low_water_check(void __iomem *); | |
1da177e4 LT |
1552 | |
1553 | /***************************************************************************** | |
1554 | * Driver level functions: * | |
1da177e4 LT |
1555 | * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); * |
1556 | * 3. MoxaDriverPoll(void); * | |
1557 | *****************************************************************************/ | |
1da177e4 LT |
1558 | #define MOXA 0x400 |
1559 | #define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */ | |
1560 | #define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */ | |
1da177e4 LT |
1561 | #define MOXA_GETDATACOUNT (MOXA + 23) |
1562 | #define MOXA_GET_IOQUEUE (MOXA + 27) | |
1563 | #define MOXA_FLUSH_QUEUE (MOXA + 28) | |
1564 | #define MOXA_GET_CONF (MOXA + 35) /* configuration */ | |
1565 | #define MOXA_GET_MAJOR (MOXA + 63) | |
1566 | #define MOXA_GET_CUMAJOR (MOXA + 64) | |
1567 | #define MOXA_GETMSTATUS (MOXA + 65) | |
1568 | ||
b4173f45 | 1569 | static void MoxaPortFlushData(struct moxa_port *port, int mode) |
1da177e4 LT |
1570 | { |
1571 | void __iomem *ofsAddr; | |
1572 | if ((mode < 0) || (mode > 2)) | |
1573 | return; | |
b4173f45 | 1574 | ofsAddr = port->tableAddr; |
1da177e4 LT |
1575 | moxafunc(ofsAddr, FC_FlushQueue, mode); |
1576 | if (mode != 1) { | |
b4173f45 | 1577 | port->lowChkFlag = 0; |
6f56b658 | 1578 | moxa_low_water_check(ofsAddr); |
1da177e4 LT |
1579 | } |
1580 | } | |
1581 | ||
b4173f45 JS |
1582 | static int MoxaDriverIoctl(struct tty_struct *tty, unsigned int cmd, |
1583 | unsigned long arg) | |
1da177e4 | 1584 | { |
b4173f45 | 1585 | struct moxa_port *port = tty->driver_data; |
1da177e4 LT |
1586 | int i; |
1587 | int status; | |
1da177e4 LT |
1588 | void __user *argp = (void __user *)arg; |
1589 | ||
b4173f45 | 1590 | if (tty->index == MAX_PORTS) { |
03718234 JS |
1591 | if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_GETDATACOUNT) && |
1592 | (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) && | |
1da177e4 LT |
1593 | (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS)) |
1594 | return (-EINVAL); | |
1595 | } | |
1596 | switch (cmd) { | |
1da177e4 LT |
1597 | case MOXA_GETDATACOUNT: |
1598 | moxaLog.tick = jiffies; | |
9dff89cd | 1599 | if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str))) |
1da177e4 LT |
1600 | return -EFAULT; |
1601 | return (0); | |
1602 | case MOXA_FLUSH_QUEUE: | |
1603 | MoxaPortFlushData(port, arg); | |
1604 | return (0); | |
8f8ecbad JS |
1605 | case MOXA_GET_IOQUEUE: { |
1606 | struct moxaq_str __user *argm = argp; | |
181d6f4f | 1607 | struct moxaq_str tmp; |
810ab09b JS |
1608 | struct moxa_port *p; |
1609 | unsigned int j; | |
1610 | ||
1611 | for (i = 0; i < MAX_BOARDS; i++) { | |
1612 | p = moxa_boards[i].ports; | |
1613 | for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { | |
1614 | memset(&tmp, 0, sizeof(tmp)); | |
1615 | if (moxa_boards[i].ready) { | |
1616 | tmp.inq = MoxaPortRxQueue(p); | |
1617 | tmp.outq = MoxaPortTxQueue(p); | |
1618 | } | |
1619 | if (copy_to_user(argm, &tmp, sizeof(tmp))) | |
1620 | return -EFAULT; | |
1da177e4 LT |
1621 | } |
1622 | } | |
810ab09b | 1623 | return 0; |
8f8ecbad | 1624 | } case MOXA_GET_OQUEUE: |
1da177e4 LT |
1625 | i = MoxaPortTxQueue(port); |
1626 | return put_user(i, (unsigned long __user *)argp); | |
1627 | case MOXA_GET_IQUEUE: | |
1628 | i = MoxaPortRxQueue(port); | |
1629 | return put_user(i, (unsigned long __user *)argp); | |
1630 | case MOXA_GET_MAJOR: | |
1631 | if(copy_to_user(argp, &ttymajor, sizeof(int))) | |
1632 | return -EFAULT; | |
1633 | return 0; | |
1634 | case MOXA_GET_CUMAJOR: | |
1635 | i = 0; | |
1636 | if(copy_to_user(argp, &i, sizeof(int))) | |
1637 | return -EFAULT; | |
1638 | return 0; | |
8f8ecbad JS |
1639 | case MOXA_GETMSTATUS: { |
1640 | struct mxser_mstatus __user *argm = argp; | |
181d6f4f | 1641 | struct mxser_mstatus tmp; |
8f8ecbad | 1642 | struct moxa_port *p; |
810ab09b JS |
1643 | unsigned int j; |
1644 | ||
1645 | for (i = 0; i < MAX_BOARDS; i++) { | |
1646 | p = moxa_boards[i].ports; | |
1647 | for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { | |
1648 | memset(&tmp, 0, sizeof(tmp)); | |
1649 | if (!moxa_boards[i].ready) | |
1650 | goto copy; | |
8f8ecbad | 1651 | |
b4173f45 | 1652 | status = MoxaPortLineStatus(p); |
1da177e4 | 1653 | if (status & 1) |
181d6f4f | 1654 | tmp.cts = 1; |
1da177e4 | 1655 | if (status & 2) |
181d6f4f | 1656 | tmp.dsr = 1; |
1da177e4 | 1657 | if (status & 4) |
181d6f4f | 1658 | tmp.dcd = 1; |
1da177e4 | 1659 | |
810ab09b JS |
1660 | if (!p->tty || !p->tty->termios) |
1661 | tmp.cflag = p->cflag; | |
1662 | else | |
1663 | tmp.cflag = p->tty->termios->c_cflag; | |
8f8ecbad | 1664 | copy: |
810ab09b JS |
1665 | if (copy_to_user(argm, &tmp, sizeof(tmp))) |
1666 | return -EFAULT; | |
1667 | } | |
1da177e4 | 1668 | } |
1da177e4 | 1669 | return 0; |
1da177e4 | 1670 | } |
1da177e4 | 1671 | } |
03718234 JS |
1672 | |
1673 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1674 | } |
1675 | ||
0bcc4caa | 1676 | static int MoxaDriverPoll(void) |
1da177e4 | 1677 | { |
8f8ecbad | 1678 | struct moxa_board_conf *brd; |
810ab09b | 1679 | struct moxa_port *p; |
1da177e4 LT |
1680 | void __iomem *ofsAddr; |
1681 | void __iomem *ip; | |
0bcc4caa JS |
1682 | unsigned int port, ports, card; |
1683 | ushort temp; | |
1da177e4 | 1684 | |
1da177e4 | 1685 | for (card = 0; card < MAX_BOARDS; card++) { |
8f8ecbad | 1686 | brd = &moxa_boards[card]; |
810ab09b | 1687 | if (brd->ready == 0) |
01cfaf0d | 1688 | continue; |
8f8ecbad | 1689 | if ((ports = brd->numPorts) == 0) |
1da177e4 | 1690 | continue; |
8f8ecbad JS |
1691 | if (readb(brd->intPend) == 0xff) { |
1692 | ip = brd->intTable + readb(brd->intNdx); | |
810ab09b | 1693 | p = brd->ports; |
1da177e4 LT |
1694 | ports <<= 1; |
1695 | for (port = 0; port < ports; port += 2, p++) { | |
810ab09b JS |
1696 | temp = readw(ip + port); |
1697 | if (temp == 0) | |
1698 | continue; | |
1699 | ||
1700 | writew(0, ip + port); | |
1701 | ofsAddr = p->tableAddr; | |
1702 | if (temp & IntrTx) | |
1703 | writew(readw(ofsAddr + HostStat) & | |
1704 | ~WakeupTx, ofsAddr + HostStat); | |
1705 | if (temp & IntrBreak) | |
1706 | p->breakCnt++; | |
1707 | ||
1708 | if (temp & IntrLine) { | |
1709 | if (readb(ofsAddr + FlagStat) & DCD_state) { | |
1710 | if ((p->DCDState & DCD_oldstate) == 0) | |
1711 | p->DCDState = (DCD_oldstate | | |
1712 | DCD_changed); | |
1713 | } else { | |
1714 | if (p->DCDState & DCD_oldstate) | |
1715 | p->DCDState = DCD_changed; | |
1da177e4 LT |
1716 | } |
1717 | } | |
1718 | } | |
8f8ecbad | 1719 | writeb(0, brd->intPend); |
1da177e4 LT |
1720 | } |
1721 | if (moxaLowWaterChk) { | |
810ab09b | 1722 | p = brd->ports; |
1da177e4 | 1723 | for (port = 0; port < ports; port++, p++) { |
810ab09b JS |
1724 | if (p->lowChkFlag) { |
1725 | p->lowChkFlag = 0; | |
1726 | ofsAddr = p->tableAddr; | |
6f56b658 | 1727 | moxa_low_water_check(ofsAddr); |
1da177e4 LT |
1728 | } |
1729 | } | |
1730 | } | |
1731 | } | |
1732 | moxaLowWaterChk = 0; | |
1da177e4 | 1733 | |
0bcc4caa | 1734 | return 0; |
1da177e4 LT |
1735 | } |
1736 | ||
1737 | /***************************************************************************** | |
1738 | * Port level functions: * | |
1da177e4 LT |
1739 | * 2. MoxaPortEnable(int port); * |
1740 | * 3. MoxaPortDisable(int port); * | |
1741 | * 4. MoxaPortGetMaxBaud(int port); * | |
1da177e4 | 1742 | * 6. MoxaPortSetBaud(int port, long baud); * |
1da177e4 LT |
1743 | * 8. MoxaPortSetTermio(int port, unsigned char *termio); * |
1744 | * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); * | |
1745 | * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); * | |
1746 | * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); * | |
1747 | * 12. MoxaPortLineStatus(int port); * | |
1748 | * 13. MoxaPortDCDChange(int port); * | |
1749 | * 14. MoxaPortDCDON(int port); * | |
1750 | * 15. MoxaPortFlushData(int port, int mode); * | |
1751 | * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); * | |
33f0f88f | 1752 | * 17. MoxaPortReadData(int port, struct tty_struct *tty); * |
1da177e4 LT |
1753 | * 20. MoxaPortTxQueue(int port); * |
1754 | * 21. MoxaPortTxFree(int port); * | |
1755 | * 22. MoxaPortRxQueue(int port); * | |
1da177e4 LT |
1756 | * 24. MoxaPortTxDisable(int port); * |
1757 | * 25. MoxaPortTxEnable(int port); * | |
1da177e4 | 1758 | * 27. MoxaPortResetBrkCnt(int port); * |
1da177e4 LT |
1759 | * 30. MoxaPortSendBreak(int port, int ticks); * |
1760 | *****************************************************************************/ | |
1761 | /* | |
1762 | * Moxa Port Number Description: | |
1763 | * | |
1764 | * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, | |
1765 | * the port number using in MOXA driver functions will be 0 to 31 for | |
1766 | * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 | |
1767 | * to 127 for fourth. For example, if you setup three MOXA boards, | |
1768 | * first board is C218, second board is C320-16 and third board is | |
1769 | * C320-32. The port number of first board (C218 - 8 ports) is from | |
1770 | * 0 to 7. The port number of second board (C320 - 16 ports) is form | |
1771 | * 32 to 47. The port number of third board (C320 - 32 ports) is from | |
1772 | * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to | |
1773 | * 127 will be invalid. | |
1774 | * | |
1775 | * | |
1776 | * Moxa Functions Description: | |
1777 | * | |
1778 | * Function 1: Driver initialization routine, this routine must be | |
1779 | * called when initialized driver. | |
1780 | * Syntax: | |
1781 | * void MoxaDriverInit(); | |
1782 | * | |
1783 | * | |
1784 | * Function 2: Moxa driver private IOCTL command processing. | |
1785 | * Syntax: | |
1786 | * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); | |
1787 | * | |
1788 | * unsigned int cmd : IOCTL command | |
1789 | * unsigned long arg : IOCTL argument | |
1790 | * int port : port number (0 - 127) | |
1791 | * | |
1792 | * return: 0 (OK) | |
1793 | * -EINVAL | |
1794 | * -ENOIOCTLCMD | |
1795 | * | |
1796 | * | |
1797 | * Function 3: Moxa driver polling process routine. | |
1798 | * Syntax: | |
1799 | * int MoxaDriverPoll(void); | |
1800 | * | |
1801 | * return: 0 ; polling O.K. | |
1802 | * -1 : no any Moxa card. | |
1803 | * | |
1804 | * | |
1da177e4 LT |
1805 | * Function 6: Enable this port to start Tx/Rx data. |
1806 | * Syntax: | |
1807 | * void MoxaPortEnable(int port); | |
1808 | * int port : port number (0 - 127) | |
1809 | * | |
1810 | * | |
1811 | * Function 7: Disable this port | |
1812 | * Syntax: | |
1813 | * void MoxaPortDisable(int port); | |
1814 | * int port : port number (0 - 127) | |
1815 | * | |
1816 | * | |
1817 | * Function 8: Get the maximun available baud rate of this port. | |
1818 | * Syntax: | |
1819 | * long MoxaPortGetMaxBaud(int port); | |
1820 | * int port : port number (0 - 127) | |
1821 | * | |
1822 | * return: 0 : this port is invalid | |
1823 | * 38400/57600/115200 bps | |
1824 | * | |
1825 | * | |
1da177e4 LT |
1826 | * Function 10: Setting baud rate of this port. |
1827 | * Syntax: | |
1828 | * long MoxaPortSetBaud(int port, long baud); | |
1829 | * int port : port number (0 - 127) | |
1830 | * long baud : baud rate (50 - 115200) | |
1831 | * | |
1832 | * return: 0 : this port is invalid or baud < 50 | |
1833 | * 50 - 115200 : the real baud rate set to the port, if | |
1834 | * the argument baud is large than maximun | |
1835 | * available baud rate, the real setting | |
1836 | * baud rate will be the maximun baud rate. | |
1837 | * | |
1838 | * | |
1da177e4 LT |
1839 | * Function 12: Configure the port. |
1840 | * Syntax: | |
606d099c | 1841 | * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); |
1da177e4 | 1842 | * int port : port number (0 - 127) |
606d099c | 1843 | * struct ktermios * termio : termio structure pointer |
c7bce309 | 1844 | * speed_t baud : baud rate |
1da177e4 LT |
1845 | * |
1846 | * return: -1 : this port is invalid or termio == NULL | |
1847 | * 0 : setting O.K. | |
1848 | * | |
1849 | * | |
1850 | * Function 13: Get the DTR/RTS state of this port. | |
1851 | * Syntax: | |
1852 | * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); | |
1853 | * int port : port number (0 - 127) | |
1854 | * int * dtrState : pointer to INT to receive the current DTR | |
1855 | * state. (if NULL, this function will not | |
1856 | * write to this address) | |
1857 | * int * rtsState : pointer to INT to receive the current RTS | |
1858 | * state. (if NULL, this function will not | |
1859 | * write to this address) | |
1860 | * | |
1861 | * return: -1 : this port is invalid | |
1862 | * 0 : O.K. | |
1863 | * | |
1864 | * | |
1865 | * Function 14: Setting the DTR/RTS output state of this port. | |
1866 | * Syntax: | |
1867 | * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); | |
1868 | * int port : port number (0 - 127) | |
1869 | * int dtrState : DTR output state (0: off, 1: on) | |
1870 | * int rtsState : RTS output state (0: off, 1: on) | |
1871 | * | |
1872 | * | |
1873 | * Function 15: Setting the flow control of this port. | |
1874 | * Syntax: | |
1875 | * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, | |
1876 | * int txFlow,int xany); | |
1877 | * int port : port number (0 - 127) | |
1878 | * int rtsFlow : H/W RTS flow control (0: no, 1: yes) | |
1879 | * int ctsFlow : H/W CTS flow control (0: no, 1: yes) | |
1880 | * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) | |
1881 | * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) | |
1882 | * int xany : S/W XANY flow control (0: no, 1: yes) | |
1883 | * | |
1884 | * | |
1885 | * Function 16: Get ths line status of this port | |
1886 | * Syntax: | |
1887 | * int MoxaPortLineStatus(int port); | |
1888 | * int port : port number (0 - 127) | |
1889 | * | |
1890 | * return: Bit 0 - CTS state (0: off, 1: on) | |
1891 | * Bit 1 - DSR state (0: off, 1: on) | |
1892 | * Bit 2 - DCD state (0: off, 1: on) | |
1893 | * | |
1894 | * | |
1895 | * Function 17: Check the DCD state has changed since the last read | |
1896 | * of this function. | |
1897 | * Syntax: | |
1898 | * int MoxaPortDCDChange(int port); | |
1899 | * int port : port number (0 - 127) | |
1900 | * | |
1901 | * return: 0 : no changed | |
1902 | * 1 : DCD has changed | |
1903 | * | |
1904 | * | |
1905 | * Function 18: Check ths current DCD state is ON or not. | |
1906 | * Syntax: | |
1907 | * int MoxaPortDCDON(int port); | |
1908 | * int port : port number (0 - 127) | |
1909 | * | |
1910 | * return: 0 : DCD off | |
1911 | * 1 : DCD on | |
1912 | * | |
1913 | * | |
1914 | * Function 19: Flush the Rx/Tx buffer data of this port. | |
1915 | * Syntax: | |
1916 | * void MoxaPortFlushData(int port, int mode); | |
1917 | * int port : port number (0 - 127) | |
1918 | * int mode | |
1919 | * 0 : flush the Rx buffer | |
1920 | * 1 : flush the Tx buffer | |
1921 | * 2 : flush the Rx and Tx buffer | |
1922 | * | |
1923 | * | |
1924 | * Function 20: Write data. | |
1925 | * Syntax: | |
1926 | * int MoxaPortWriteData(int port, unsigned char * buffer, int length); | |
1927 | * int port : port number (0 - 127) | |
1928 | * unsigned char * buffer : pointer to write data buffer. | |
1929 | * int length : write data length | |
1930 | * | |
1931 | * return: 0 - length : real write data length | |
1932 | * | |
1933 | * | |
1934 | * Function 21: Read data. | |
1935 | * Syntax: | |
33f0f88f | 1936 | * int MoxaPortReadData(int port, struct tty_struct *tty); |
1da177e4 | 1937 | * int port : port number (0 - 127) |
33f0f88f | 1938 | * struct tty_struct *tty : tty for data |
1da177e4 LT |
1939 | * |
1940 | * return: 0 - length : real read data length | |
1941 | * | |
1942 | * | |
1da177e4 LT |
1943 | * Function 24: Get the Tx buffer current queued data bytes |
1944 | * Syntax: | |
1945 | * int MoxaPortTxQueue(int port); | |
1946 | * int port : port number (0 - 127) | |
1947 | * | |
1948 | * return: .. : Tx buffer current queued data bytes | |
1949 | * | |
1950 | * | |
1951 | * Function 25: Get the Tx buffer current free space | |
1952 | * Syntax: | |
1953 | * int MoxaPortTxFree(int port); | |
1954 | * int port : port number (0 - 127) | |
1955 | * | |
1956 | * return: .. : Tx buffer current free space | |
1957 | * | |
1958 | * | |
1959 | * Function 26: Get the Rx buffer current queued data bytes | |
1960 | * Syntax: | |
1961 | * int MoxaPortRxQueue(int port); | |
1962 | * int port : port number (0 - 127) | |
1963 | * | |
1964 | * return: .. : Rx buffer current queued data bytes | |
1965 | * | |
1966 | * | |
1da177e4 LT |
1967 | * Function 28: Disable port data transmission. |
1968 | * Syntax: | |
1969 | * void MoxaPortTxDisable(int port); | |
1970 | * int port : port number (0 - 127) | |
1971 | * | |
1972 | * | |
1973 | * Function 29: Enable port data transmission. | |
1974 | * Syntax: | |
1975 | * void MoxaPortTxEnable(int port); | |
1976 | * int port : port number (0 - 127) | |
1977 | * | |
1978 | * | |
1da177e4 LT |
1979 | * Function 31: Get the received BREAK signal count and reset it. |
1980 | * Syntax: | |
1981 | * int MoxaPortResetBrkCnt(int port); | |
1982 | * int port : port number (0 - 127) | |
1983 | * | |
1984 | * return: 0 - .. : BREAK signal count | |
1985 | * | |
1986 | * | |
1da177e4 LT |
1987 | * Function 34: Send out a BREAK signal. |
1988 | * Syntax: | |
1989 | * void MoxaPortSendBreak(int port, int ms100); | |
1990 | * int port : port number (0 - 127) | |
1991 | * int ms100 : break signal time interval. | |
1992 | * unit: 100 mini-second. if ms100 == 0, it will | |
1993 | * send out a about 250 ms BREAK signal. | |
1994 | * | |
1995 | */ | |
1da177e4 | 1996 | |
b4173f45 | 1997 | static void MoxaPortEnable(struct moxa_port *port) |
1da177e4 LT |
1998 | { |
1999 | void __iomem *ofsAddr; | |
1da177e4 LT |
2000 | short lowwater = 512; |
2001 | ||
b4173f45 | 2002 | ofsAddr = port->tableAddr; |
1da177e4 | 2003 | writew(lowwater, ofsAddr + Low_water); |
b4173f45 JS |
2004 | port->breakCnt = 0; |
2005 | if (port->board->boardType == MOXA_BOARD_C320_ISA || | |
2006 | port->board->boardType == MOXA_BOARD_C320_PCI) { | |
1da177e4 LT |
2007 | moxafunc(ofsAddr, FC_SetBreakIrq, 0); |
2008 | } else { | |
2009 | writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat); | |
2010 | } | |
2011 | ||
2012 | moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); | |
2013 | moxafunc(ofsAddr, FC_FlushQueue, 2); | |
2014 | ||
2015 | moxafunc(ofsAddr, FC_EnableCH, Magic_code); | |
2016 | MoxaPortLineStatus(port); | |
2017 | } | |
2018 | ||
b4173f45 | 2019 | static void MoxaPortDisable(struct moxa_port *port) |
1da177e4 | 2020 | { |
b4173f45 | 2021 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 LT |
2022 | |
2023 | moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ | |
2024 | moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); | |
2025 | writew(0, ofsAddr + HostStat); | |
2026 | moxafunc(ofsAddr, FC_DisableCH, Magic_code); | |
2027 | } | |
2028 | ||
b4173f45 | 2029 | static long MoxaPortGetMaxBaud(struct moxa_port *port) |
1da177e4 | 2030 | { |
b4173f45 JS |
2031 | if (port->board->boardType == MOXA_BOARD_C320_ISA || |
2032 | port->board->boardType == MOXA_BOARD_C320_PCI) | |
1da177e4 LT |
2033 | return (460800L); |
2034 | else | |
2035 | return (921600L); | |
2036 | } | |
2037 | ||
2038 | ||
b4173f45 | 2039 | static long MoxaPortSetBaud(struct moxa_port *port, long baud) |
1da177e4 LT |
2040 | { |
2041 | void __iomem *ofsAddr; | |
2042 | long max, clock; | |
2043 | unsigned int val; | |
2044 | ||
2045 | if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0)) | |
2046 | return (0); | |
b4173f45 | 2047 | ofsAddr = port->tableAddr; |
1da177e4 LT |
2048 | if (baud > max) |
2049 | baud = max; | |
2050 | if (max == 38400L) | |
2051 | clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */ | |
2052 | else if (max == 57600L) | |
2053 | clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */ | |
2054 | else | |
2055 | clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */ | |
2056 | val = clock / baud; | |
2057 | moxafunc(ofsAddr, FC_SetBaud, val); | |
2058 | baud = clock / val; | |
1da177e4 LT |
2059 | return (baud); |
2060 | } | |
2061 | ||
b4173f45 JS |
2062 | static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, |
2063 | speed_t baud) | |
1da177e4 LT |
2064 | { |
2065 | void __iomem *ofsAddr; | |
2066 | tcflag_t cflag; | |
1da177e4 LT |
2067 | tcflag_t mode = 0; |
2068 | ||
b4173f45 | 2069 | ofsAddr = port->tableAddr; |
1da177e4 LT |
2070 | cflag = termio->c_cflag; /* termio->c_cflag */ |
2071 | ||
2072 | mode = termio->c_cflag & CSIZE; | |
2073 | if (mode == CS5) | |
2074 | mode = MX_CS5; | |
2075 | else if (mode == CS6) | |
2076 | mode = MX_CS6; | |
2077 | else if (mode == CS7) | |
2078 | mode = MX_CS7; | |
2079 | else if (mode == CS8) | |
2080 | mode = MX_CS8; | |
2081 | ||
2082 | if (termio->c_cflag & CSTOPB) { | |
2083 | if (mode == MX_CS5) | |
2084 | mode |= MX_STOP15; | |
2085 | else | |
2086 | mode |= MX_STOP2; | |
2087 | } else | |
2088 | mode |= MX_STOP1; | |
2089 | ||
2090 | if (termio->c_cflag & PARENB) { | |
2091 | if (termio->c_cflag & PARODD) | |
2092 | mode |= MX_PARODD; | |
2093 | else | |
2094 | mode |= MX_PAREVEN; | |
2095 | } else | |
2096 | mode |= MX_PARNONE; | |
2097 | ||
2098 | moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode); | |
2099 | ||
b4173f45 JS |
2100 | if (port->board->boardType == MOXA_BOARD_C320_ISA || |
2101 | port->board->boardType == MOXA_BOARD_C320_PCI) { | |
c7bce309 | 2102 | if (baud >= 921600L) |
1da177e4 LT |
2103 | return (-1); |
2104 | } | |
db1acaa6 | 2105 | baud = MoxaPortSetBaud(port, baud); |
1da177e4 LT |
2106 | |
2107 | if (termio->c_iflag & (IXON | IXOFF | IXANY)) { | |
2108 | writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); | |
2109 | writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); | |
2110 | writeb(FC_SetXonXoff, ofsAddr + FuncCode); | |
6f56b658 | 2111 | moxa_wait_finish(ofsAddr); |
1da177e4 LT |
2112 | |
2113 | } | |
db1acaa6 | 2114 | return (baud); |
1da177e4 LT |
2115 | } |
2116 | ||
b4173f45 JS |
2117 | static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, |
2118 | int *rtsState) | |
1da177e4 LT |
2119 | { |
2120 | ||
b4173f45 JS |
2121 | if (dtrState) |
2122 | *dtrState = !!(port->lineCtrl & DTR_ON); | |
2123 | if (rtsState) | |
2124 | *rtsState = !!(port->lineCtrl & RTS_ON); | |
2125 | ||
1da177e4 LT |
2126 | return (0); |
2127 | } | |
2128 | ||
b4173f45 | 2129 | static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) |
1da177e4 | 2130 | { |
b4173f45 | 2131 | int mode = 0; |
1da177e4 | 2132 | |
1da177e4 LT |
2133 | if (dtr) |
2134 | mode |= DTR_ON; | |
2135 | if (rts) | |
2136 | mode |= RTS_ON; | |
b4173f45 JS |
2137 | port->lineCtrl = mode; |
2138 | moxafunc(port->tableAddr, FC_LineControl, mode); | |
1da177e4 LT |
2139 | } |
2140 | ||
b4173f45 JS |
2141 | static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, |
2142 | int txflow, int rxflow, int txany) | |
1da177e4 | 2143 | { |
b4173f45 | 2144 | int mode = 0; |
1da177e4 | 2145 | |
1da177e4 LT |
2146 | if (rts) |
2147 | mode |= RTS_FlowCtl; | |
2148 | if (cts) | |
2149 | mode |= CTS_FlowCtl; | |
2150 | if (txflow) | |
2151 | mode |= Tx_FlowCtl; | |
2152 | if (rxflow) | |
2153 | mode |= Rx_FlowCtl; | |
2154 | if (txany) | |
2155 | mode |= IXM_IXANY; | |
b4173f45 | 2156 | moxafunc(port->tableAddr, FC_SetFlowCtl, mode); |
1da177e4 LT |
2157 | } |
2158 | ||
b4173f45 | 2159 | static int MoxaPortLineStatus(struct moxa_port *port) |
1da177e4 LT |
2160 | { |
2161 | void __iomem *ofsAddr; | |
2162 | int val; | |
2163 | ||
b4173f45 JS |
2164 | ofsAddr = port->tableAddr; |
2165 | if (port->board->boardType == MOXA_BOARD_C320_ISA || | |
2166 | port->board->boardType == MOXA_BOARD_C320_PCI) { | |
1da177e4 LT |
2167 | moxafunc(ofsAddr, FC_LineStatus, 0); |
2168 | val = readw(ofsAddr + FuncArg); | |
2169 | } else { | |
2170 | val = readw(ofsAddr + FlagStat) >> 4; | |
2171 | } | |
2172 | val &= 0x0B; | |
2173 | if (val & 8) { | |
2174 | val |= 4; | |
b4173f45 JS |
2175 | if ((port->DCDState & DCD_oldstate) == 0) |
2176 | port->DCDState = (DCD_oldstate | DCD_changed); | |
1da177e4 | 2177 | } else { |
b4173f45 JS |
2178 | if (port->DCDState & DCD_oldstate) |
2179 | port->DCDState = DCD_changed; | |
1da177e4 LT |
2180 | } |
2181 | val &= 7; | |
2182 | return (val); | |
2183 | } | |
2184 | ||
b4173f45 | 2185 | static int MoxaPortDCDChange(struct moxa_port *port) |
1da177e4 LT |
2186 | { |
2187 | int n; | |
2188 | ||
b4173f45 JS |
2189 | n = port->DCDState; |
2190 | port->DCDState &= ~DCD_changed; | |
1da177e4 LT |
2191 | n &= DCD_changed; |
2192 | return (n); | |
2193 | } | |
2194 | ||
b4173f45 | 2195 | static int MoxaPortDCDON(struct moxa_port *port) |
1da177e4 LT |
2196 | { |
2197 | int n; | |
2198 | ||
b4173f45 | 2199 | if (port->DCDState & DCD_oldstate) |
1da177e4 LT |
2200 | n = 1; |
2201 | else | |
2202 | n = 0; | |
2203 | return (n); | |
2204 | } | |
2205 | ||
b4173f45 JS |
2206 | static int MoxaPortWriteData(struct moxa_port *port, unsigned char *buffer, |
2207 | int len) | |
1da177e4 LT |
2208 | { |
2209 | int c, total, i; | |
2210 | ushort tail; | |
2211 | int cnt; | |
2212 | ushort head, tx_mask, spage, epage; | |
2213 | ushort pageno, pageofs, bufhead; | |
2214 | void __iomem *baseAddr, *ofsAddr, *ofs; | |
2215 | ||
b4173f45 JS |
2216 | ofsAddr = port->tableAddr; |
2217 | baseAddr = port->board->basemem; | |
1da177e4 LT |
2218 | tx_mask = readw(ofsAddr + TX_mask); |
2219 | spage = readw(ofsAddr + Page_txb); | |
2220 | epage = readw(ofsAddr + EndPage_txb); | |
2221 | tail = readw(ofsAddr + TXwptr); | |
2222 | head = readw(ofsAddr + TXrptr); | |
2223 | c = (head > tail) ? (head - tail - 1) | |
2224 | : (head - tail + tx_mask); | |
2225 | if (c > len) | |
2226 | c = len; | |
b4173f45 | 2227 | moxaLog.txcnt[port->tty->index] += c; |
1da177e4 LT |
2228 | total = c; |
2229 | if (spage == epage) { | |
2230 | bufhead = readw(ofsAddr + Ofs_txb); | |
2231 | writew(spage, baseAddr + Control_reg); | |
2232 | while (c > 0) { | |
2233 | if (head > tail) | |
2234 | len = head - tail - 1; | |
2235 | else | |
2236 | len = tx_mask + 1 - tail; | |
2237 | len = (c > len) ? len : c; | |
2238 | ofs = baseAddr + DynPage_addr + bufhead + tail; | |
2239 | for (i = 0; i < len; i++) | |
2240 | writeb(*buffer++, ofs + i); | |
2241 | tail = (tail + len) & tx_mask; | |
2242 | c -= len; | |
2243 | } | |
2244 | writew(tail, ofsAddr + TXwptr); | |
2245 | } else { | |
2246 | len = c; | |
2247 | pageno = spage + (tail >> 13); | |
2248 | pageofs = tail & Page_mask; | |
2249 | do { | |
2250 | cnt = Page_size - pageofs; | |
2251 | if (cnt > c) | |
2252 | cnt = c; | |
2253 | c -= cnt; | |
2254 | writeb(pageno, baseAddr + Control_reg); | |
2255 | ofs = baseAddr + DynPage_addr + pageofs; | |
2256 | for (i = 0; i < cnt; i++) | |
2257 | writeb(*buffer++, ofs + i); | |
2258 | if (c == 0) { | |
2259 | writew((tail + len) & tx_mask, ofsAddr + TXwptr); | |
2260 | break; | |
2261 | } | |
2262 | if (++pageno == epage) | |
2263 | pageno = spage; | |
2264 | pageofs = 0; | |
2265 | } while (1); | |
2266 | } | |
2267 | writeb(1, ofsAddr + CD180TXirq); /* start to send */ | |
2268 | return (total); | |
2269 | } | |
2270 | ||
b4173f45 | 2271 | static int MoxaPortReadData(struct moxa_port *port, struct tty_struct *tty) |
1da177e4 LT |
2272 | { |
2273 | register ushort head, pageofs; | |
2274 | int i, count, cnt, len, total, remain; | |
2275 | ushort tail, rx_mask, spage, epage; | |
2276 | ushort pageno, bufhead; | |
2277 | void __iomem *baseAddr, *ofsAddr, *ofs; | |
2278 | ||
b4173f45 JS |
2279 | ofsAddr = port->tableAddr; |
2280 | baseAddr = port->board->basemem; | |
1da177e4 LT |
2281 | head = readw(ofsAddr + RXrptr); |
2282 | tail = readw(ofsAddr + RXwptr); | |
2283 | rx_mask = readw(ofsAddr + RX_mask); | |
2284 | spage = readw(ofsAddr + Page_rxb); | |
2285 | epage = readw(ofsAddr + EndPage_rxb); | |
2286 | count = (tail >= head) ? (tail - head) | |
2287 | : (tail - head + rx_mask + 1); | |
2288 | if (count == 0) | |
33f0f88f | 2289 | return 0; |
1da177e4 | 2290 | |
33f0f88f | 2291 | total = count; |
1da177e4 | 2292 | remain = count - total; |
b4173f45 | 2293 | moxaLog.rxcnt[port->tty->index] += total; |
1da177e4 LT |
2294 | count = total; |
2295 | if (spage == epage) { | |
2296 | bufhead = readw(ofsAddr + Ofs_rxb); | |
2297 | writew(spage, baseAddr + Control_reg); | |
2298 | while (count > 0) { | |
2299 | if (tail >= head) | |
2300 | len = tail - head; | |
2301 | else | |
2302 | len = rx_mask + 1 - head; | |
2303 | len = (count > len) ? len : count; | |
2304 | ofs = baseAddr + DynPage_addr + bufhead + head; | |
2305 | for (i = 0; i < len; i++) | |
33f0f88f | 2306 | tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL); |
1da177e4 LT |
2307 | head = (head + len) & rx_mask; |
2308 | count -= len; | |
2309 | } | |
2310 | writew(head, ofsAddr + RXrptr); | |
2311 | } else { | |
2312 | len = count; | |
2313 | pageno = spage + (head >> 13); | |
2314 | pageofs = head & Page_mask; | |
2315 | do { | |
2316 | cnt = Page_size - pageofs; | |
2317 | if (cnt > count) | |
2318 | cnt = count; | |
2319 | count -= cnt; | |
2320 | writew(pageno, baseAddr + Control_reg); | |
2321 | ofs = baseAddr + DynPage_addr + pageofs; | |
2322 | for (i = 0; i < cnt; i++) | |
33f0f88f | 2323 | tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL); |
1da177e4 LT |
2324 | if (count == 0) { |
2325 | writew((head + len) & rx_mask, ofsAddr + RXrptr); | |
2326 | break; | |
2327 | } | |
2328 | if (++pageno == epage) | |
2329 | pageno = spage; | |
2330 | pageofs = 0; | |
2331 | } while (1); | |
2332 | } | |
2333 | if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) { | |
2334 | moxaLowWaterChk = 1; | |
b4173f45 | 2335 | port->lowChkFlag = 1; |
1da177e4 LT |
2336 | } |
2337 | return (total); | |
2338 | } | |
2339 | ||
2340 | ||
b4173f45 | 2341 | static int MoxaPortTxQueue(struct moxa_port *port) |
1da177e4 | 2342 | { |
b4173f45 | 2343 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 LT |
2344 | ushort rptr, wptr, mask; |
2345 | int len; | |
2346 | ||
1da177e4 LT |
2347 | rptr = readw(ofsAddr + TXrptr); |
2348 | wptr = readw(ofsAddr + TXwptr); | |
2349 | mask = readw(ofsAddr + TX_mask); | |
2350 | len = (wptr - rptr) & mask; | |
2351 | return (len); | |
2352 | } | |
2353 | ||
b4173f45 | 2354 | static int MoxaPortTxFree(struct moxa_port *port) |
1da177e4 | 2355 | { |
b4173f45 | 2356 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 LT |
2357 | ushort rptr, wptr, mask; |
2358 | int len; | |
2359 | ||
1da177e4 LT |
2360 | rptr = readw(ofsAddr + TXrptr); |
2361 | wptr = readw(ofsAddr + TXwptr); | |
2362 | mask = readw(ofsAddr + TX_mask); | |
2363 | len = mask - ((wptr - rptr) & mask); | |
2364 | return (len); | |
2365 | } | |
2366 | ||
b4173f45 | 2367 | static int MoxaPortRxQueue(struct moxa_port *port) |
1da177e4 | 2368 | { |
b4173f45 | 2369 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 LT |
2370 | ushort rptr, wptr, mask; |
2371 | int len; | |
2372 | ||
1da177e4 LT |
2373 | rptr = readw(ofsAddr + RXrptr); |
2374 | wptr = readw(ofsAddr + RXwptr); | |
2375 | mask = readw(ofsAddr + RX_mask); | |
2376 | len = (wptr - rptr) & mask; | |
2377 | return (len); | |
2378 | } | |
2379 | ||
2380 | ||
b4173f45 | 2381 | static void MoxaPortTxDisable(struct moxa_port *port) |
1da177e4 | 2382 | { |
b4173f45 | 2383 | moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); |
1da177e4 LT |
2384 | } |
2385 | ||
b4173f45 | 2386 | static void MoxaPortTxEnable(struct moxa_port *port) |
1da177e4 | 2387 | { |
b4173f45 | 2388 | moxafunc(port->tableAddr, FC_SetXonState, Magic_code); |
1da177e4 LT |
2389 | } |
2390 | ||
2391 | ||
b4173f45 | 2392 | static int MoxaPortResetBrkCnt(struct moxa_port *port) |
1da177e4 LT |
2393 | { |
2394 | ushort cnt; | |
b4173f45 JS |
2395 | cnt = port->breakCnt; |
2396 | port->breakCnt = 0; | |
1da177e4 LT |
2397 | return (cnt); |
2398 | } | |
2399 | ||
2400 | ||
b4173f45 | 2401 | static void MoxaPortSendBreak(struct moxa_port *port, int ms100) |
1da177e4 | 2402 | { |
b4173f45 | 2403 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 | 2404 | |
1da177e4 LT |
2405 | if (ms100) { |
2406 | moxafunc(ofsAddr, FC_SendBreak, Magic_code); | |
24c032f1 | 2407 | msleep(ms100 * 10); |
1da177e4 LT |
2408 | } else { |
2409 | moxafunc(ofsAddr, FC_SendBreak, Magic_code); | |
24c032f1 | 2410 | msleep(250); |
1da177e4 LT |
2411 | } |
2412 | moxafunc(ofsAddr, FC_StopBreak, Magic_code); | |
2413 | } | |
2414 | ||
8f8ecbad | 2415 | static int moxa_get_serial_info(struct moxa_port *info, |
1da177e4 LT |
2416 | struct serial_struct __user *retinfo) |
2417 | { | |
2418 | struct serial_struct tmp; | |
2419 | ||
2420 | memset(&tmp, 0, sizeof(tmp)); | |
2421 | tmp.type = info->type; | |
b4173f45 | 2422 | tmp.line = info->tty->index; |
1da177e4 LT |
2423 | tmp.port = 0; |
2424 | tmp.irq = 0; | |
2425 | tmp.flags = info->asyncflags; | |
2426 | tmp.baud_base = 921600; | |
2427 | tmp.close_delay = info->close_delay; | |
1da177e4 LT |
2428 | tmp.custom_divisor = 0; |
2429 | tmp.hub6 = 0; | |
2430 | if(copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2431 | return -EFAULT; | |
2432 | return (0); | |
2433 | } | |
2434 | ||
2435 | ||
8f8ecbad | 2436 | static int moxa_set_serial_info(struct moxa_port *info, |
1da177e4 LT |
2437 | struct serial_struct __user *new_info) |
2438 | { | |
2439 | struct serial_struct new_serial; | |
2440 | ||
2441 | if(copy_from_user(&new_serial, new_info, sizeof(new_serial))) | |
2442 | return -EFAULT; | |
2443 | ||
2444 | if ((new_serial.irq != 0) || | |
2445 | (new_serial.port != 0) || | |
2446 | // (new_serial.type != info->type) || | |
2447 | (new_serial.custom_divisor != 0) || | |
2448 | (new_serial.baud_base != 921600)) | |
2449 | return (-EPERM); | |
2450 | ||
2451 | if (!capable(CAP_SYS_ADMIN)) { | |
2452 | if (((new_serial.flags & ~ASYNC_USR_MASK) != | |
2453 | (info->asyncflags & ~ASYNC_USR_MASK))) | |
2454 | return (-EPERM); | |
2455 | } else { | |
2456 | info->close_delay = new_serial.close_delay * HZ / 100; | |
1da177e4 LT |
2457 | } |
2458 | ||
2459 | new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); | |
2460 | new_serial.flags |= (info->asyncflags & ASYNC_FLAGS); | |
2461 | ||
2462 | if (new_serial.type == PORT_16550A) { | |
b4173f45 | 2463 | MoxaSetFifo(info, 1); |
1da177e4 | 2464 | } else { |
b4173f45 | 2465 | MoxaSetFifo(info, 0); |
1da177e4 LT |
2466 | } |
2467 | ||
2468 | info->type = new_serial.type; | |
2469 | return (0); | |
2470 | } | |
2471 | ||
2472 | ||
2473 | ||
2474 | /***************************************************************************** | |
2475 | * Static local functions: * | |
2476 | *****************************************************************************/ | |
1da177e4 LT |
2477 | static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg) |
2478 | { | |
2479 | ||
2480 | writew(arg, ofsAddr + FuncArg); | |
2481 | writew(cmd, ofsAddr + FuncCode); | |
6f56b658 | 2482 | moxa_wait_finish(ofsAddr); |
1da177e4 LT |
2483 | } |
2484 | ||
6f56b658 | 2485 | static void moxa_wait_finish(void __iomem *ofsAddr) |
1da177e4 LT |
2486 | { |
2487 | unsigned long i, j; | |
2488 | ||
2489 | i = jiffies; | |
2490 | while (readw(ofsAddr + FuncCode) != 0) { | |
2491 | j = jiffies; | |
2492 | if ((j - i) > moxaFuncTout) { | |
2493 | return; | |
2494 | } | |
2495 | } | |
2496 | } | |
2497 | ||
6f56b658 | 2498 | static void moxa_low_water_check(void __iomem *ofsAddr) |
1da177e4 LT |
2499 | { |
2500 | int len; | |
2501 | ushort rptr, wptr, mask; | |
2502 | ||
2503 | if (readb(ofsAddr + FlagStat) & Xoff_state) { | |
2504 | rptr = readw(ofsAddr + RXrptr); | |
2505 | wptr = readw(ofsAddr + RXwptr); | |
2506 | mask = readw(ofsAddr + RX_mask); | |
2507 | len = (wptr - rptr) & mask; | |
2508 | if (len <= Low_water) | |
2509 | moxafunc(ofsAddr, FC_SendXon, 0); | |
2510 | } | |
2511 | } | |
2512 | ||
b4173f45 | 2513 | static void MoxaSetFifo(struct moxa_port *port, int enable) |
1da177e4 | 2514 | { |
b4173f45 | 2515 | void __iomem *ofsAddr = port->tableAddr; |
1da177e4 LT |
2516 | |
2517 | if (!enable) { | |
2518 | moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); | |
2519 | moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); | |
2520 | } else { | |
2521 | moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); | |
2522 | moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); | |
2523 | } | |
2524 | } |