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1da177e4 LT |
1 | /* |
2 | * pc300_tty.c Cyclades-PC300(tm) TTY Driver. | |
3 | * | |
4 | * Author: Regina Kodato <reginak@cyclades.com> | |
5 | * | |
6 | * Copyright: (c) 1999-2002 Cyclades Corp. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | * $Log: pc300_tty.c,v $ | |
14 | * Revision 3.7 2002/03/07 14:17:09 henrique | |
15 | * License data fixed | |
16 | * | |
17 | * Revision 3.6 2001/12/10 12:29:42 regina | |
18 | * Fix the MLPPP bug | |
19 | * | |
20 | * Revision 3.5 2001/10/31 11:20:05 regina | |
21 | * automatic pppd starts | |
22 | * | |
23 | * Revision 3.4 2001/08/06 12:01:51 regina | |
24 | * problem in DSR_DE bit | |
25 | * | |
26 | * Revision 3.3 2001/07/26 22:58:41 regina | |
27 | * update EDA value | |
28 | * | |
29 | * Revision 3.2 2001/07/12 13:11:20 regina | |
30 | * bug fix - DCD-OFF in pc300 tty driver | |
31 | * | |
32 | * DMA transmission bug fix | |
33 | * | |
34 | * Revision 3.1 2001/06/22 13:13:02 regina | |
35 | * MLPPP implementation | |
36 | * | |
37 | */ | |
38 | ||
39 | #include <linux/module.h> | |
40 | #include <linux/kernel.h> | |
1da177e4 LT |
41 | #include <linux/errno.h> |
42 | #include <linux/string.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/netdevice.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/if.h> | |
48 | #include <linux/skbuff.h> | |
49 | /* TTY includes */ | |
50 | #include <linux/tty.h> | |
51 | #include <linux/tty_flip.h> | |
52 | #include <linux/serial.h> | |
53 | ||
54 | #include <asm/io.h> | |
55 | #include <asm/uaccess.h> | |
56 | ||
57 | #include "pc300.h" | |
58 | ||
59 | /* defines and macros */ | |
60 | /* TTY Global definitions */ | |
61 | #define CPC_TTY_NPORTS 8 /* maximum number of the sync tty connections */ | |
62 | #define CPC_TTY_MAJOR CYCLADES_MAJOR | |
63 | #define CPC_TTY_MINOR_START 240 /* minor of the first PC300 interface */ | |
64 | ||
65 | #define CPC_TTY_MAX_MTU 2000 | |
66 | ||
67 | /* tty interface state */ | |
68 | #define CPC_TTY_ST_IDLE 0 | |
69 | #define CPC_TTY_ST_INIT 1 /* configured with MLPPP and up */ | |
70 | #define CPC_TTY_ST_OPEN 2 /* opened by application */ | |
71 | ||
72 | #define CPC_TTY_LOCK(card,flags)\ | |
73 | do {\ | |
74 | spin_lock_irqsave(&card->card_lock, flags); \ | |
75 | } while (0) | |
76 | ||
77 | #define CPC_TTY_UNLOCK(card,flags) \ | |
78 | do {\ | |
79 | spin_unlock_irqrestore(&card->card_lock, flags); \ | |
80 | } while (0) | |
81 | ||
82 | //#define CPC_TTY_DBG(format,a...) printk(format,##a) | |
83 | #define CPC_TTY_DBG(format,a...) | |
84 | ||
85 | /* data structures */ | |
86 | typedef struct _st_cpc_rx_buf { | |
87 | struct _st_cpc_rx_buf *next; | |
88 | int size; | |
89 | unsigned char data[1]; | |
90 | } st_cpc_rx_buf; | |
91 | ||
92 | struct st_cpc_rx_list { | |
93 | st_cpc_rx_buf *first; | |
94 | st_cpc_rx_buf *last; | |
95 | }; | |
96 | ||
97 | typedef struct _st_cpc_tty_area { | |
98 | int state; /* state of the TTY interface */ | |
99 | int num_open; | |
100 | unsigned int tty_minor; /* minor this interface */ | |
101 | volatile struct st_cpc_rx_list buf_rx; /* ptr. to reception buffer */ | |
102 | unsigned char* buf_tx; /* ptr. to transmission buffer */ | |
103 | pc300dev_t* pc300dev; /* ptr. to info struct in PC300 driver */ | |
104 | unsigned char name[20]; /* interf. name + "-tty" */ | |
105 | struct tty_struct *tty; | |
106 | struct work_struct tty_tx_work; /* tx work - tx interrupt */ | |
107 | struct work_struct tty_rx_work; /* rx work - rx interrupt */ | |
108 | } st_cpc_tty_area; | |
109 | ||
110 | /* TTY data structures */ | |
111 | static struct tty_driver serial_drv; | |
112 | ||
113 | /* local variables */ | |
7665a089 | 114 | static st_cpc_tty_area cpc_tty_area[CPC_TTY_NPORTS]; |
1da177e4 | 115 | |
7665a089 AB |
116 | static int cpc_tty_cnt = 0; /* number of intrfaces configured with MLPPP */ |
117 | static int cpc_tty_unreg_flag = 0; | |
1da177e4 LT |
118 | |
119 | /* TTY functions prototype */ | |
120 | static int cpc_tty_open(struct tty_struct *tty, struct file *flip); | |
121 | static void cpc_tty_close(struct tty_struct *tty, struct file *flip); | |
122 | static int cpc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count); | |
123 | static int cpc_tty_write_room(struct tty_struct *tty); | |
124 | static int cpc_tty_chars_in_buffer(struct tty_struct *tty); | |
125 | static void cpc_tty_flush_buffer(struct tty_struct *tty); | |
126 | static void cpc_tty_hangup(struct tty_struct *tty); | |
c4028958 DH |
127 | static void cpc_tty_rx_work(struct work_struct *work); |
128 | static void cpc_tty_tx_work(struct work_struct *work); | |
1da177e4 LT |
129 | static int cpc_tty_send_to_card(pc300dev_t *dev,void *buf, int len); |
130 | static void cpc_tty_trace(pc300dev_t *dev, char* buf, int len, char rxtx); | |
131 | static void cpc_tty_signal_off(pc300dev_t *pc300dev, unsigned char); | |
132 | static void cpc_tty_signal_on(pc300dev_t *pc300dev, unsigned char); | |
133 | ||
7665a089 AB |
134 | static int pc300_tiocmset(struct tty_struct *, struct file *, |
135 | unsigned int, unsigned int); | |
136 | static int pc300_tiocmget(struct tty_struct *, struct file *); | |
1da177e4 LT |
137 | |
138 | /* functions called by PC300 driver */ | |
139 | void cpc_tty_init(pc300dev_t *dev); | |
140 | void cpc_tty_unregister_service(pc300dev_t *pc300dev); | |
141 | void cpc_tty_receive(pc300dev_t *pc300dev); | |
142 | void cpc_tty_trigger_poll(pc300dev_t *pc300dev); | |
143 | void cpc_tty_reset_var(void); | |
144 | ||
145 | /* | |
146 | * PC300 TTY clear "signal" | |
147 | */ | |
148 | static void cpc_tty_signal_off(pc300dev_t *pc300dev, unsigned char signal) | |
149 | { | |
150 | pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan; | |
151 | pc300_t *card = (pc300_t *) pc300chan->card; | |
152 | int ch = pc300chan->channel; | |
153 | unsigned long flags; | |
154 | ||
155 | CPC_TTY_DBG("%s-tty: Clear signal %x\n", | |
156 | pc300dev->dev->name, signal); | |
157 | CPC_TTY_LOCK(card, flags); | |
158 | cpc_writeb(card->hw.scabase + M_REG(CTL,ch), | |
159 | cpc_readb(card->hw.scabase+M_REG(CTL,ch))& signal); | |
160 | CPC_TTY_UNLOCK(card,flags); | |
161 | } | |
162 | ||
163 | /* | |
164 | * PC300 TTY set "signal" to ON | |
165 | */ | |
166 | static void cpc_tty_signal_on(pc300dev_t *pc300dev, unsigned char signal) | |
167 | { | |
168 | pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan; | |
169 | pc300_t *card = (pc300_t *) pc300chan->card; | |
170 | int ch = pc300chan->channel; | |
171 | unsigned long flags; | |
172 | ||
173 | CPC_TTY_DBG("%s-tty: Set signal %x\n", | |
174 | pc300dev->dev->name, signal); | |
175 | CPC_TTY_LOCK(card, flags); | |
176 | cpc_writeb(card->hw.scabase + M_REG(CTL,ch), | |
177 | cpc_readb(card->hw.scabase+M_REG(CTL,ch))& ~signal); | |
178 | CPC_TTY_UNLOCK(card,flags); | |
179 | } | |
180 | ||
56dbbb9a AC |
181 | |
182 | static const struct tty_operations pc300_ops = { | |
183 | .open = cpc_tty_open, | |
184 | .close = cpc_tty_close, | |
185 | .write = cpc_tty_write, | |
186 | .write_room = cpc_tty_write_room, | |
187 | .chars_in_buffer = cpc_tty_chars_in_buffer, | |
188 | .tiocmset = pc300_tiocmset, | |
189 | .tiocmget = pc300_tiocmget, | |
190 | .flush_buffer = cpc_tty_flush_buffer, | |
191 | .hangup = cpc_tty_hangup, | |
192 | }; | |
193 | ||
194 | ||
1da177e4 LT |
195 | /* |
196 | * PC300 TTY initialization routine | |
197 | * | |
198 | * This routine is called by the PC300 driver during board configuration | |
199 | * (ioctl=SIOCSP300CONF). At this point the adapter is completely | |
200 | * initialized. | |
201 | * o verify kernel version (only 2.4.x) | |
202 | * o register TTY driver | |
203 | * o init cpc_tty_area struct | |
204 | */ | |
205 | void cpc_tty_init(pc300dev_t *pc300dev) | |
206 | { | |
207 | unsigned long port; | |
208 | int aux; | |
209 | st_cpc_tty_area * cpc_tty; | |
210 | ||
211 | /* hdlcX - X=interface number */ | |
212 | port = pc300dev->dev->name[4] - '0'; | |
213 | if (port >= CPC_TTY_NPORTS) { | |
214 | printk("%s-tty: invalid interface selected (0-%i): %li", | |
215 | pc300dev->dev->name, | |
216 | CPC_TTY_NPORTS-1,port); | |
217 | return; | |
218 | } | |
219 | ||
220 | if (cpc_tty_cnt == 0) { /* first TTY connection -> register driver */ | |
221 | CPC_TTY_DBG("%s-tty: driver init, major:%i, minor range:%i=%i\n", | |
222 | pc300dev->dev->name, | |
223 | CPC_TTY_MAJOR, CPC_TTY_MINOR_START, | |
224 | CPC_TTY_MINOR_START+CPC_TTY_NPORTS); | |
225 | /* initialize tty driver struct */ | |
226 | memset(&serial_drv,0,sizeof(struct tty_driver)); | |
227 | serial_drv.magic = TTY_DRIVER_MAGIC; | |
228 | serial_drv.owner = THIS_MODULE; | |
229 | serial_drv.driver_name = "pc300_tty"; | |
230 | serial_drv.name = "ttyCP"; | |
231 | serial_drv.major = CPC_TTY_MAJOR; | |
232 | serial_drv.minor_start = CPC_TTY_MINOR_START; | |
233 | serial_drv.num = CPC_TTY_NPORTS; | |
234 | serial_drv.type = TTY_DRIVER_TYPE_SERIAL; | |
235 | serial_drv.subtype = SERIAL_TYPE_NORMAL; | |
236 | ||
237 | serial_drv.init_termios = tty_std_termios; | |
238 | serial_drv.init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; | |
239 | serial_drv.flags = TTY_DRIVER_REAL_RAW; | |
240 | ||
241 | /* interface routines from the upper tty layer to the tty driver */ | |
56dbbb9a | 242 | tty_set_operations(&serial_drv, &pc300_ops); |
1da177e4 LT |
243 | |
244 | /* register the TTY driver */ | |
245 | if (tty_register_driver(&serial_drv)) { | |
246 | printk("%s-tty: Failed to register serial driver! ", | |
247 | pc300dev->dev->name); | |
248 | return; | |
249 | } | |
250 | ||
251 | memset((void *)cpc_tty_area, 0, | |
252 | sizeof(st_cpc_tty_area) * CPC_TTY_NPORTS); | |
253 | } | |
254 | ||
255 | cpc_tty = &cpc_tty_area[port]; | |
256 | ||
257 | if (cpc_tty->state != CPC_TTY_ST_IDLE) { | |
258 | CPC_TTY_DBG("%s-tty: TTY port %i, already in use.\n", | |
259 | pc300dev->dev->name, port); | |
260 | return; | |
261 | } | |
262 | ||
263 | cpc_tty_cnt++; | |
264 | cpc_tty->state = CPC_TTY_ST_INIT; | |
265 | cpc_tty->num_open= 0; | |
266 | cpc_tty->tty_minor = port + CPC_TTY_MINOR_START; | |
267 | cpc_tty->pc300dev = pc300dev; | |
268 | ||
c4028958 DH |
269 | INIT_WORK(&cpc_tty->tty_tx_work, cpc_tty_tx_work); |
270 | INIT_WORK(&cpc_tty->tty_rx_work, cpc_tty_rx_work); | |
1da177e4 LT |
271 | |
272 | cpc_tty->buf_rx.first = cpc_tty->buf_rx.last = NULL; | |
273 | ||
274 | pc300dev->cpc_tty = (void *)cpc_tty; | |
275 | ||
276 | aux = strlen(pc300dev->dev->name); | |
277 | memcpy(cpc_tty->name, pc300dev->dev->name, aux); | |
278 | memcpy(&cpc_tty->name[aux], "-tty", 5); | |
279 | ||
280 | cpc_open(pc300dev->dev); | |
281 | cpc_tty_signal_off(pc300dev, CTL_DTR); | |
282 | ||
283 | CPC_TTY_DBG("%s: Initializing TTY Sync Driver, tty major#%d minor#%i\n", | |
284 | cpc_tty->name,CPC_TTY_MAJOR,cpc_tty->tty_minor); | |
285 | return; | |
286 | } | |
287 | ||
288 | /* | |
289 | * PC300 TTY OPEN routine | |
290 | * | |
291 | * This routine is called by the tty driver to open the interface | |
292 | * o verify minor | |
293 | * o allocate buffer to Rx and Tx | |
294 | */ | |
295 | static int cpc_tty_open(struct tty_struct *tty, struct file *flip) | |
296 | { | |
297 | int port ; | |
298 | st_cpc_tty_area *cpc_tty; | |
299 | ||
300 | if (!tty) { | |
301 | return -ENODEV; | |
302 | } | |
303 | ||
304 | port = tty->index; | |
305 | ||
306 | if ((port < 0) || (port >= CPC_TTY_NPORTS)){ | |
307 | CPC_TTY_DBG("pc300_tty: open invalid port %d\n", port); | |
308 | return -ENODEV; | |
309 | } | |
310 | ||
311 | cpc_tty = &cpc_tty_area[port]; | |
312 | ||
313 | if (cpc_tty->state == CPC_TTY_ST_IDLE){ | |
314 | CPC_TTY_DBG("%s: open - invalid interface, port=%d\n", | |
315 | cpc_tty->name, tty->index); | |
316 | return -ENODEV; | |
317 | } | |
318 | ||
319 | if (cpc_tty->num_open == 0) { /* first open of this tty */ | |
320 | if (!cpc_tty_area[port].buf_tx){ | |
321 | cpc_tty_area[port].buf_tx = kmalloc(CPC_TTY_MAX_MTU,GFP_KERNEL); | |
79ea13ce | 322 | if (!cpc_tty_area[port].buf_tx) { |
1da177e4 LT |
323 | CPC_TTY_DBG("%s: error in memory allocation\n",cpc_tty->name); |
324 | return -ENOMEM; | |
325 | } | |
326 | } | |
327 | ||
328 | if (cpc_tty_area[port].buf_rx.first) { | |
329 | unsigned char * aux; | |
330 | while (cpc_tty_area[port].buf_rx.first) { | |
331 | aux = (unsigned char *)cpc_tty_area[port].buf_rx.first; | |
332 | cpc_tty_area[port].buf_rx.first = cpc_tty_area[port].buf_rx.first->next; | |
333 | kfree(aux); | |
334 | } | |
335 | cpc_tty_area[port].buf_rx.first = NULL; | |
336 | cpc_tty_area[port].buf_rx.last = NULL; | |
337 | } | |
338 | ||
339 | cpc_tty_area[port].state = CPC_TTY_ST_OPEN; | |
340 | cpc_tty_area[port].tty = tty; | |
341 | tty->driver_data = &cpc_tty_area[port]; | |
342 | ||
343 | cpc_tty_signal_on(cpc_tty->pc300dev, CTL_DTR); | |
344 | } | |
345 | ||
346 | cpc_tty->num_open++; | |
347 | ||
348 | CPC_TTY_DBG("%s: opening TTY driver\n", cpc_tty->name); | |
349 | ||
350 | /* avisar driver PC300 */ | |
351 | return 0; | |
352 | } | |
353 | ||
354 | /* | |
355 | * PC300 TTY CLOSE routine | |
356 | * | |
357 | * This routine is called by the tty driver to close the interface | |
358 | * o call close channel in PC300 driver (cpc_closech) | |
359 | * o free Rx and Tx buffers | |
360 | */ | |
361 | ||
362 | static void cpc_tty_close(struct tty_struct *tty, struct file *flip) | |
363 | { | |
364 | st_cpc_tty_area *cpc_tty; | |
365 | unsigned long flags; | |
366 | int res; | |
367 | ||
368 | if (!tty || !tty->driver_data ) { | |
369 | CPC_TTY_DBG("hdlx-tty: no TTY in close \n"); | |
370 | return; | |
371 | } | |
372 | ||
373 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
374 | ||
375 | if ((cpc_tty->tty != tty)|| (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
376 | CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name); | |
377 | return; | |
378 | } | |
379 | ||
380 | if (!cpc_tty->num_open) { | |
381 | CPC_TTY_DBG("%s: TTY is closed\n",cpc_tty->name); | |
382 | return; | |
383 | } | |
384 | ||
385 | if (--cpc_tty->num_open > 0) { | |
386 | CPC_TTY_DBG("%s: TTY closed\n",cpc_tty->name); | |
387 | return; | |
388 | } | |
389 | ||
390 | cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR); | |
391 | ||
392 | CPC_TTY_LOCK(cpc_tty->pc300dev->chan->card, flags); /* lock irq */ | |
393 | cpc_tty->tty = NULL; | |
394 | cpc_tty->state = CPC_TTY_ST_INIT; | |
395 | CPC_TTY_UNLOCK(cpc_tty->pc300dev->chan->card, flags); /* unlock irq */ | |
396 | ||
397 | if (cpc_tty->buf_rx.first) { | |
398 | unsigned char * aux; | |
399 | while (cpc_tty->buf_rx.first) { | |
400 | aux = (unsigned char *)cpc_tty->buf_rx.first; | |
401 | cpc_tty->buf_rx.first = cpc_tty->buf_rx.first->next; | |
402 | kfree(aux); | |
403 | } | |
404 | cpc_tty->buf_rx.first = NULL; | |
405 | cpc_tty->buf_rx.last = NULL; | |
406 | } | |
407 | ||
6a5d3621 JJ |
408 | kfree(cpc_tty->buf_tx); |
409 | cpc_tty->buf_tx = NULL; | |
1da177e4 LT |
410 | |
411 | CPC_TTY_DBG("%s: TTY closed\n",cpc_tty->name); | |
412 | ||
413 | if (!serial_drv.refcount && cpc_tty_unreg_flag) { | |
414 | cpc_tty_unreg_flag = 0; | |
415 | CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name); | |
416 | if ((res=tty_unregister_driver(&serial_drv))) { | |
417 | CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n", | |
418 | cpc_tty->name,res); | |
419 | } | |
420 | } | |
421 | return; | |
422 | } | |
423 | ||
424 | /* | |
425 | * PC300 TTY WRITE routine | |
426 | * | |
427 | * This routine is called by the tty driver to write a series of characters | |
428 | * to the tty device. The characters may come from user or kernel space. | |
429 | * o verify the DCD signal | |
430 | * o send characters to board and start the transmission | |
431 | */ | |
432 | static int cpc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
433 | { | |
434 | st_cpc_tty_area *cpc_tty; | |
435 | pc300ch_t *pc300chan; | |
436 | pc300_t *card; | |
437 | int ch; | |
438 | unsigned long flags; | |
439 | struct net_device_stats *stats; | |
440 | ||
441 | if (!tty || !tty->driver_data ) { | |
442 | CPC_TTY_DBG("hdlcX-tty: no TTY in write\n"); | |
443 | return -ENODEV; | |
444 | } | |
445 | ||
446 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
447 | ||
448 | if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
449 | CPC_TTY_DBG("%s: TTY is not opened\n", cpc_tty->name); | |
450 | return -ENODEV; | |
451 | } | |
452 | ||
453 | if (count > CPC_TTY_MAX_MTU) { | |
454 | CPC_TTY_DBG("%s: count is invalid\n",cpc_tty->name); | |
455 | return -EINVAL; /* frame too big */ | |
456 | } | |
457 | ||
458 | CPC_TTY_DBG("%s: cpc_tty_write data len=%i\n",cpc_tty->name,count); | |
459 | ||
460 | pc300chan = (pc300ch_t *)((pc300dev_t*)cpc_tty->pc300dev)->chan; | |
198191c4 | 461 | stats = &cpc_tty->pc300dev->dev->stats; |
1da177e4 LT |
462 | card = (pc300_t *) pc300chan->card; |
463 | ch = pc300chan->channel; | |
464 | ||
465 | /* verify DCD signal*/ | |
466 | if (cpc_readb(card->hw.scabase + M_REG(ST3,ch)) & ST3_DCD) { | |
467 | /* DCD is OFF */ | |
468 | CPC_TTY_DBG("%s : DCD is OFF\n", cpc_tty->name); | |
469 | stats->tx_errors++; | |
470 | stats->tx_carrier_errors++; | |
471 | CPC_TTY_LOCK(card, flags); | |
472 | cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_BUF_CLR); | |
473 | ||
474 | if (card->hw.type == PC300_TE) { | |
475 | cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2, | |
476 | cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) & | |
477 | ~(CPLD_REG2_FALC_LED1 << (2 *ch))); | |
478 | } | |
479 | ||
480 | CPC_TTY_UNLOCK(card, flags); | |
481 | ||
482 | return -EINVAL; | |
483 | } | |
484 | ||
485 | if (cpc_tty_send_to_card(cpc_tty->pc300dev, (void*)buf, count)) { | |
486 | /* failed to send */ | |
487 | CPC_TTY_DBG("%s: trasmition error\n", cpc_tty->name); | |
488 | return 0; | |
489 | } | |
490 | return count; | |
491 | } | |
492 | ||
493 | /* | |
494 | * PC300 TTY Write Room routine | |
495 | * | |
496 | * This routine returns the numbers of characteres the tty driver will accept | |
497 | * for queuing to be written. | |
498 | * o return MTU | |
499 | */ | |
500 | static int cpc_tty_write_room(struct tty_struct *tty) | |
501 | { | |
502 | st_cpc_tty_area *cpc_tty; | |
503 | ||
504 | if (!tty || !tty->driver_data ) { | |
505 | CPC_TTY_DBG("hdlcX-tty: no TTY to write room\n"); | |
506 | return -ENODEV; | |
507 | } | |
508 | ||
509 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
510 | ||
511 | if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
512 | CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name); | |
513 | return -ENODEV; | |
514 | } | |
515 | ||
516 | CPC_TTY_DBG("%s: write room\n",cpc_tty->name); | |
517 | ||
518 | return CPC_TTY_MAX_MTU; | |
519 | } | |
520 | ||
521 | /* | |
522 | * PC300 TTY chars in buffer routine | |
523 | * | |
524 | * This routine returns the chars number in the transmission buffer | |
525 | * o returns 0 | |
526 | */ | |
527 | static int cpc_tty_chars_in_buffer(struct tty_struct *tty) | |
528 | { | |
529 | st_cpc_tty_area *cpc_tty; | |
530 | ||
531 | if (!tty || !tty->driver_data ) { | |
532 | CPC_TTY_DBG("hdlcX-tty: no TTY to chars in buffer\n"); | |
533 | return -ENODEV; | |
534 | } | |
535 | ||
536 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
537 | ||
538 | if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
539 | CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name); | |
540 | return -ENODEV; | |
541 | } | |
542 | ||
543 | return(0); | |
544 | } | |
545 | ||
7665a089 AB |
546 | static int pc300_tiocmset(struct tty_struct *tty, struct file *file, |
547 | unsigned int set, unsigned int clear) | |
1da177e4 LT |
548 | { |
549 | st_cpc_tty_area *cpc_tty; | |
550 | ||
b39d66a8 | 551 | CPC_TTY_DBG("%s: set:%x clear:%x\n", __func__, set, clear); |
1da177e4 LT |
552 | |
553 | if (!tty || !tty->driver_data ) { | |
554 | CPC_TTY_DBG("hdlcX-tty: no TTY to chars in buffer\n"); | |
555 | return -ENODEV; | |
556 | } | |
557 | ||
558 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
559 | ||
560 | if (set & TIOCM_RTS) | |
561 | cpc_tty_signal_on(cpc_tty->pc300dev, CTL_RTS); | |
562 | if (set & TIOCM_DTR) | |
563 | cpc_tty_signal_on(cpc_tty->pc300dev, CTL_DTR); | |
564 | ||
565 | if (clear & TIOCM_RTS) | |
566 | cpc_tty_signal_off(cpc_tty->pc300dev, CTL_RTS); | |
567 | if (clear & TIOCM_DTR) | |
568 | cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR); | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
7665a089 | 573 | static int pc300_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 LT |
574 | { |
575 | unsigned int result; | |
576 | unsigned char status; | |
577 | unsigned long flags; | |
578 | st_cpc_tty_area *cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
579 | pc300dev_t *pc300dev = cpc_tty->pc300dev; | |
580 | pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan; | |
581 | pc300_t *card = (pc300_t *) pc300chan->card; | |
582 | int ch = pc300chan->channel; | |
583 | ||
584 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
585 | ||
586 | CPC_TTY_DBG("%s-tty: tiocmget\n", | |
587 | ((struct net_device*)(pc300dev->hdlc))->name); | |
588 | ||
589 | CPC_TTY_LOCK(card, flags); | |
590 | status = cpc_readb(card->hw.scabase+M_REG(CTL,ch)); | |
591 | CPC_TTY_UNLOCK(card,flags); | |
592 | ||
593 | result = ((status & CTL_DTR) ? TIOCM_DTR : 0) | | |
594 | ((status & CTL_RTS) ? TIOCM_RTS : 0); | |
595 | ||
596 | return result; | |
597 | } | |
598 | ||
599 | /* | |
600 | * PC300 TTY Flush Buffer routine | |
601 | * | |
602 | * This routine resets the transmission buffer | |
603 | */ | |
604 | static void cpc_tty_flush_buffer(struct tty_struct *tty) | |
605 | { | |
606 | st_cpc_tty_area *cpc_tty; | |
607 | ||
608 | if (!tty || !tty->driver_data ) { | |
609 | CPC_TTY_DBG("hdlcX-tty: no TTY to flush buffer\n"); | |
610 | return; | |
611 | } | |
612 | ||
613 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
614 | ||
615 | if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
616 | CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name); | |
617 | return; | |
618 | } | |
619 | ||
620 | CPC_TTY_DBG("%s: call wake_up_interruptible\n",cpc_tty->name); | |
621 | ||
622 | tty_wakeup(tty); | |
623 | return; | |
624 | } | |
625 | ||
626 | /* | |
627 | * PC300 TTY Hangup routine | |
628 | * | |
629 | * This routine is called by the tty driver to hangup the interface | |
630 | * o clear DTR signal | |
631 | */ | |
632 | ||
633 | static void cpc_tty_hangup(struct tty_struct *tty) | |
634 | { | |
635 | st_cpc_tty_area *cpc_tty; | |
636 | int res; | |
637 | ||
638 | if (!tty || !tty->driver_data ) { | |
639 | CPC_TTY_DBG("hdlcX-tty: no TTY to hangup\n"); | |
640 | return ; | |
641 | } | |
642 | ||
643 | cpc_tty = (st_cpc_tty_area *) tty->driver_data; | |
644 | ||
645 | if ((cpc_tty->tty != tty) || (cpc_tty->state != CPC_TTY_ST_OPEN)) { | |
646 | CPC_TTY_DBG("%s: TTY is not opened\n",cpc_tty->name); | |
647 | return ; | |
648 | } | |
649 | if (!serial_drv.refcount && cpc_tty_unreg_flag) { | |
650 | cpc_tty_unreg_flag = 0; | |
651 | CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name); | |
652 | if ((res=tty_unregister_driver(&serial_drv))) { | |
653 | CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n", | |
654 | cpc_tty->name,res); | |
655 | } | |
656 | } | |
657 | cpc_tty_signal_off(cpc_tty->pc300dev, CTL_DTR); | |
658 | } | |
659 | ||
660 | /* | |
661 | * PC300 TTY RX work routine | |
662 | * This routine treats RX work | |
663 | * o verify read buffer | |
664 | * o call the line disc. read | |
665 | * o free memory | |
666 | */ | |
c4028958 | 667 | static void cpc_tty_rx_work(struct work_struct *work) |
1da177e4 | 668 | { |
c4028958 | 669 | st_cpc_tty_area *cpc_tty; |
1da177e4 LT |
670 | unsigned long port; |
671 | int i, j; | |
6a5d3621 | 672 | volatile st_cpc_rx_buf *buf; |
1da177e4 LT |
673 | char flags=0,flg_rx=1; |
674 | struct tty_ldisc *ld; | |
675 | ||
676 | if (cpc_tty_cnt == 0) return; | |
1da177e4 LT |
677 | |
678 | for (i=0; (i < 4) && flg_rx ; i++) { | |
679 | flg_rx = 0; | |
c4028958 DH |
680 | |
681 | cpc_tty = container_of(work, st_cpc_tty_area, tty_rx_work); | |
682 | port = cpc_tty - cpc_tty_area; | |
683 | ||
1da177e4 LT |
684 | for (j=0; j < CPC_TTY_NPORTS; j++) { |
685 | cpc_tty = &cpc_tty_area[port]; | |
686 | ||
79ea13ce | 687 | if ((buf=cpc_tty->buf_rx.first) != NULL) { |
6a5d3621 | 688 | if (cpc_tty->tty) { |
1da177e4 | 689 | ld = tty_ldisc_ref(cpc_tty->tty); |
6a5d3621 | 690 | if (ld) { |
a352def2 | 691 | if (ld->ops->receive_buf) { |
1da177e4 | 692 | CPC_TTY_DBG("%s: call line disc. receive_buf\n",cpc_tty->name); |
a352def2 | 693 | ld->ops->receive_buf(cpc_tty->tty, (char *)(buf->data), &flags, buf->size); |
1da177e4 LT |
694 | } |
695 | tty_ldisc_deref(ld); | |
696 | } | |
697 | } | |
698 | cpc_tty->buf_rx.first = cpc_tty->buf_rx.first->next; | |
33f0f88f | 699 | kfree((void *)buf); |
1da177e4 LT |
700 | buf = cpc_tty->buf_rx.first; |
701 | flg_rx = 1; | |
702 | } | |
703 | if (++port == CPC_TTY_NPORTS) port = 0; | |
704 | } | |
705 | } | |
706 | } | |
707 | ||
708 | /* | |
709 | * PC300 TTY RX work routine | |
710 | * | |
711 | * This routine treats RX interrupt. | |
712 | * o read all frames in card | |
713 | * o verify the frame size | |
714 | * o read the frame in rx buffer | |
715 | */ | |
716 | static void cpc_tty_rx_disc_frame(pc300ch_t *pc300chan) | |
717 | { | |
718 | volatile pcsca_bd_t __iomem * ptdescr; | |
719 | volatile unsigned char status; | |
720 | pc300_t *card = (pc300_t *)pc300chan->card; | |
721 | int ch = pc300chan->channel; | |
722 | ||
723 | /* dma buf read */ | |
724 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + | |
725 | RX_BD_ADDR(ch, pc300chan->rx_first_bd)); | |
726 | while (pc300chan->rx_first_bd != pc300chan->rx_last_bd) { | |
727 | status = cpc_readb(&ptdescr->status); | |
728 | cpc_writeb(&ptdescr->status, 0); | |
729 | cpc_writeb(&ptdescr->len, 0); | |
730 | pc300chan->rx_first_bd = (pc300chan->rx_first_bd + 1) & | |
731 | (N_DMA_RX_BUF - 1); | |
732 | if (status & DST_EOM) { | |
733 | break; /* end of message */ | |
734 | } | |
735 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + cpc_readl(&ptdescr->next)); | |
736 | } | |
737 | } | |
738 | ||
739 | void cpc_tty_receive(pc300dev_t *pc300dev) | |
740 | { | |
6a5d3621 | 741 | st_cpc_tty_area *cpc_tty; |
1da177e4 LT |
742 | pc300ch_t *pc300chan = (pc300ch_t *)pc300dev->chan; |
743 | pc300_t *card = (pc300_t *)pc300chan->card; | |
744 | int ch = pc300chan->channel; | |
745 | volatile pcsca_bd_t __iomem * ptdescr; | |
198191c4 | 746 | struct net_device_stats *stats = &pc300dev->dev->stats; |
1da177e4 LT |
747 | int rx_len, rx_aux; |
748 | volatile unsigned char status; | |
749 | unsigned short first_bd = pc300chan->rx_first_bd; | |
6a5d3621 | 750 | st_cpc_rx_buf *new = NULL; |
1da177e4 LT |
751 | unsigned char dsr_rx; |
752 | ||
753 | if (pc300dev->cpc_tty == NULL) { | |
754 | return; | |
755 | } | |
756 | ||
757 | dsr_rx = cpc_readb(card->hw.scabase + DSR_RX(ch)); | |
758 | ||
759 | cpc_tty = (st_cpc_tty_area *)pc300dev->cpc_tty; | |
760 | ||
761 | while (1) { | |
762 | rx_len = 0; | |
763 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + RX_BD_ADDR(ch, first_bd)); | |
764 | while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) { | |
765 | rx_len += cpc_readw(&ptdescr->len); | |
766 | first_bd = (first_bd + 1) & (N_DMA_RX_BUF - 1); | |
767 | if (status & DST_EOM) { | |
768 | break; | |
769 | } | |
6a5d3621 | 770 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase+cpc_readl(&ptdescr->next)); |
1da177e4 LT |
771 | } |
772 | ||
773 | if (!rx_len) { | |
774 | if (dsr_rx & DSR_BOF) { | |
775 | /* update EDA */ | |
776 | cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch), | |
777 | RX_BD_ADDR(ch, pc300chan->rx_last_bd)); | |
778 | } | |
6a5d3621 | 779 | kfree(new); |
1da177e4 LT |
780 | return; |
781 | } | |
782 | ||
783 | if (rx_len > CPC_TTY_MAX_MTU) { | |
784 | /* Free RX descriptors */ | |
785 | CPC_TTY_DBG("%s: frame size is invalid.\n",cpc_tty->name); | |
786 | stats->rx_errors++; | |
787 | stats->rx_frame_errors++; | |
788 | cpc_tty_rx_disc_frame(pc300chan); | |
789 | continue; | |
790 | } | |
791 | ||
5cbded58 | 792 | new = kmalloc(rx_len + sizeof(st_cpc_rx_buf), GFP_ATOMIC); |
79ea13ce | 793 | if (!new) { |
1da177e4 LT |
794 | cpc_tty_rx_disc_frame(pc300chan); |
795 | continue; | |
796 | } | |
797 | ||
798 | /* dma buf read */ | |
799 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + | |
800 | RX_BD_ADDR(ch, pc300chan->rx_first_bd)); | |
801 | ||
802 | rx_len = 0; /* counter frame size */ | |
803 | ||
804 | while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) { | |
805 | rx_aux = cpc_readw(&ptdescr->len); | |
806 | if ((status & (DST_OVR | DST_CRC | DST_RBIT | DST_SHRT | DST_ABT)) | |
807 | || (rx_aux > BD_DEF_LEN)) { | |
808 | CPC_TTY_DBG("%s: reception error\n", cpc_tty->name); | |
809 | stats->rx_errors++; | |
810 | if (status & DST_OVR) { | |
811 | stats->rx_fifo_errors++; | |
812 | } | |
813 | if (status & DST_CRC) { | |
814 | stats->rx_crc_errors++; | |
815 | } | |
816 | if ((status & (DST_RBIT | DST_SHRT | DST_ABT)) || | |
817 | (rx_aux > BD_DEF_LEN)) { | |
818 | stats->rx_frame_errors++; | |
819 | } | |
820 | /* discard remainig descriptors used by the bad frame */ | |
821 | CPC_TTY_DBG("%s: reception error - discard descriptors", | |
822 | cpc_tty->name); | |
823 | cpc_tty_rx_disc_frame(pc300chan); | |
824 | rx_len = 0; | |
825 | kfree(new); | |
826 | new = NULL; | |
827 | break; /* read next frame - while(1) */ | |
828 | } | |
829 | ||
830 | if (cpc_tty->state != CPC_TTY_ST_OPEN) { | |
831 | /* Free RX descriptors */ | |
832 | cpc_tty_rx_disc_frame(pc300chan); | |
833 | stats->rx_dropped++; | |
834 | rx_len = 0; | |
835 | kfree(new); | |
836 | new = NULL; | |
837 | break; /* read next frame - while(1) */ | |
838 | } | |
839 | ||
840 | /* read the segment of the frame */ | |
841 | if (rx_aux != 0) { | |
842 | memcpy_fromio((new->data + rx_len), | |
843 | (void __iomem *)(card->hw.rambase + | |
844 | cpc_readl(&ptdescr->ptbuf)), rx_aux); | |
845 | rx_len += rx_aux; | |
846 | } | |
847 | cpc_writeb(&ptdescr->status,0); | |
848 | cpc_writeb(&ptdescr->len, 0); | |
849 | pc300chan->rx_first_bd = (pc300chan->rx_first_bd + 1) & | |
850 | (N_DMA_RX_BUF -1); | |
851 | if (status & DST_EOM)break; | |
852 | ||
853 | ptdescr = (pcsca_bd_t __iomem *) (card->hw.rambase + | |
854 | cpc_readl(&ptdescr->next)); | |
855 | } | |
856 | /* update pointer */ | |
857 | pc300chan->rx_last_bd = (pc300chan->rx_first_bd - 1) & | |
858 | (N_DMA_RX_BUF - 1) ; | |
859 | if (!(dsr_rx & DSR_BOF)) { | |
860 | /* update EDA */ | |
861 | cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch), | |
862 | RX_BD_ADDR(ch, pc300chan->rx_last_bd)); | |
863 | } | |
864 | if (rx_len != 0) { | |
865 | stats->rx_bytes += rx_len; | |
866 | ||
867 | if (pc300dev->trace_on) { | |
868 | cpc_tty_trace(pc300dev, new->data,rx_len, 'R'); | |
869 | } | |
870 | new->size = rx_len; | |
871 | new->next = NULL; | |
79ea13ce | 872 | if (cpc_tty->buf_rx.first == NULL) { |
1da177e4 LT |
873 | cpc_tty->buf_rx.first = new; |
874 | cpc_tty->buf_rx.last = new; | |
875 | } else { | |
876 | cpc_tty->buf_rx.last->next = new; | |
877 | cpc_tty->buf_rx.last = new; | |
878 | } | |
879 | schedule_work(&(cpc_tty->tty_rx_work)); | |
880 | stats->rx_packets++; | |
881 | } | |
882 | } | |
883 | } | |
884 | ||
885 | /* | |
886 | * PC300 TTY TX work routine | |
887 | * | |
888 | * This routine treats TX interrupt. | |
889 | * o if need call line discipline wakeup | |
890 | * o call wake_up_interruptible | |
891 | */ | |
c4028958 | 892 | static void cpc_tty_tx_work(struct work_struct *work) |
1da177e4 | 893 | { |
c4028958 DH |
894 | st_cpc_tty_area *cpc_tty = |
895 | container_of(work, st_cpc_tty_area, tty_tx_work); | |
1da177e4 LT |
896 | struct tty_struct *tty; |
897 | ||
898 | CPC_TTY_DBG("%s: cpc_tty_tx_work init\n",cpc_tty->name); | |
899 | ||
79ea13ce | 900 | if ((tty = cpc_tty->tty) == NULL) { |
1da177e4 LT |
901 | CPC_TTY_DBG("%s: the interface is not opened\n",cpc_tty->name); |
902 | return; | |
903 | } | |
904 | tty_wakeup(tty); | |
905 | } | |
906 | ||
907 | /* | |
908 | * PC300 TTY send to card routine | |
909 | * | |
910 | * This routine send data to card. | |
911 | * o clear descriptors | |
912 | * o write data to DMA buffers | |
913 | * o start the transmission | |
914 | */ | |
915 | static int cpc_tty_send_to_card(pc300dev_t *dev,void* buf, int len) | |
916 | { | |
917 | pc300ch_t *chan = (pc300ch_t *)dev->chan; | |
918 | pc300_t *card = (pc300_t *)chan->card; | |
919 | int ch = chan->channel; | |
198191c4 | 920 | struct net_device_stats *stats = &dev->dev->stats; |
1da177e4 LT |
921 | unsigned long flags; |
922 | volatile pcsca_bd_t __iomem *ptdescr; | |
923 | int i, nchar; | |
924 | int tosend = len; | |
925 | int nbuf = ((len - 1)/BD_DEF_LEN) + 1; | |
926 | unsigned char *pdata=buf; | |
927 | ||
928 | CPC_TTY_DBG("%s:cpc_tty_send_to_cars len=%i", | |
929 | (st_cpc_tty_area *)dev->cpc_tty->name,len); | |
930 | ||
931 | if (nbuf >= card->chan[ch].nfree_tx_bd) { | |
932 | return 1; | |
933 | } | |
934 | ||
935 | /* write buffer to DMA buffers */ | |
936 | CPC_TTY_DBG("%s: call dma_buf_write\n", | |
937 | (st_cpc_tty_area *)dev->cpc_tty->name); | |
938 | for (i = 0 ; i < nbuf ; i++) { | |
939 | ptdescr = (pcsca_bd_t __iomem *)(card->hw.rambase + | |
940 | TX_BD_ADDR(ch, card->chan[ch].tx_next_bd)); | |
941 | nchar = (BD_DEF_LEN > tosend) ? tosend : BD_DEF_LEN; | |
942 | if (cpc_readb(&ptdescr->status) & DST_OSB) { | |
943 | memcpy_toio((void __iomem *)(card->hw.rambase + | |
944 | cpc_readl(&ptdescr->ptbuf)), | |
945 | &pdata[len - tosend], | |
946 | nchar); | |
947 | card->chan[ch].nfree_tx_bd--; | |
948 | if ((i + 1) == nbuf) { | |
949 | /* This must be the last BD to be used */ | |
950 | cpc_writeb(&ptdescr->status, DST_EOM); | |
951 | } else { | |
952 | cpc_writeb(&ptdescr->status, 0); | |
953 | } | |
954 | cpc_writew(&ptdescr->len, nchar); | |
955 | } else { | |
956 | CPC_TTY_DBG("%s: error in dma_buf_write\n", | |
957 | (st_cpc_tty_area *)dev->cpc_tty->name); | |
958 | stats->tx_dropped++; | |
959 | return 1; | |
960 | } | |
961 | tosend -= nchar; | |
962 | card->chan[ch].tx_next_bd = | |
963 | (card->chan[ch].tx_next_bd + 1) & (N_DMA_TX_BUF - 1); | |
964 | } | |
965 | ||
966 | if (dev->trace_on) { | |
967 | cpc_tty_trace(dev, buf, len,'T'); | |
968 | } | |
969 | ||
970 | /* start transmission */ | |
971 | CPC_TTY_DBG("%s: start transmission\n", | |
972 | (st_cpc_tty_area *)dev->cpc_tty->name); | |
973 | ||
974 | CPC_TTY_LOCK(card, flags); | |
975 | cpc_writeb(card->hw.scabase + DTX_REG(EDAL, ch), | |
976 | TX_BD_ADDR(ch, chan->tx_next_bd)); | |
977 | cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_ENA); | |
978 | cpc_writeb(card->hw.scabase + DSR_TX(ch), DSR_DE); | |
979 | ||
980 | if (card->hw.type == PC300_TE) { | |
981 | cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2, | |
982 | cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) | | |
983 | (CPLD_REG2_FALC_LED1 << (2 * ch))); | |
984 | } | |
985 | CPC_TTY_UNLOCK(card, flags); | |
986 | return 0; | |
987 | } | |
988 | ||
989 | /* | |
990 | * PC300 TTY trace routine | |
991 | * | |
992 | * This routine send trace of connection to application. | |
993 | * o clear descriptors | |
994 | * o write data to DMA buffers | |
995 | * o start the transmission | |
996 | */ | |
997 | ||
998 | static void cpc_tty_trace(pc300dev_t *dev, char* buf, int len, char rxtx) | |
999 | { | |
1000 | struct sk_buff *skb; | |
1001 | ||
1002 | if ((skb = dev_alloc_skb(10 + len)) == NULL) { | |
1003 | /* out of memory */ | |
1004 | CPC_TTY_DBG("%s: tty_trace - out of memory\n", dev->dev->name); | |
1005 | return; | |
1006 | } | |
1007 | ||
1008 | skb_put (skb, 10 + len); | |
1009 | skb->dev = dev->dev; | |
1010 | skb->protocol = htons(ETH_P_CUST); | |
459a98ed | 1011 | skb_reset_mac_header(skb); |
1da177e4 LT |
1012 | skb->pkt_type = PACKET_HOST; |
1013 | skb->len = 10 + len; | |
1014 | ||
27d7ff46 | 1015 | skb_copy_to_linear_data(skb, dev->dev->name, 5); |
1da177e4 LT |
1016 | skb->data[5] = '['; |
1017 | skb->data[6] = rxtx; | |
1018 | skb->data[7] = ']'; | |
1019 | skb->data[8] = ':'; | |
1020 | skb->data[9] = ' '; | |
27d7ff46 | 1021 | skb_copy_to_linear_data_offset(skb, 10, buf, len); |
1da177e4 LT |
1022 | netif_rx(skb); |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * PC300 TTY unregister service routine | |
1027 | * | |
1028 | * This routine unregister one interface. | |
1029 | */ | |
1030 | void cpc_tty_unregister_service(pc300dev_t *pc300dev) | |
1031 | { | |
1032 | st_cpc_tty_area *cpc_tty; | |
1033 | ulong flags; | |
1034 | int res; | |
1035 | ||
79ea13ce | 1036 | if ((cpc_tty= (st_cpc_tty_area *) pc300dev->cpc_tty) == NULL) { |
1da177e4 LT |
1037 | CPC_TTY_DBG("%s: interface is not TTY\n", pc300dev->dev->name); |
1038 | return; | |
1039 | } | |
1040 | CPC_TTY_DBG("%s: cpc_tty_unregister_service", cpc_tty->name); | |
1041 | ||
1042 | if (cpc_tty->pc300dev != pc300dev) { | |
1043 | CPC_TTY_DBG("%s: invalid tty ptr=%s\n", | |
1044 | pc300dev->dev->name, cpc_tty->name); | |
1045 | return; | |
1046 | } | |
1047 | ||
1048 | if (--cpc_tty_cnt == 0) { | |
1049 | if (serial_drv.refcount) { | |
1050 | CPC_TTY_DBG("%s: unregister is not possible, refcount=%d", | |
1051 | cpc_tty->name, serial_drv.refcount); | |
1052 | cpc_tty_cnt++; | |
1053 | cpc_tty_unreg_flag = 1; | |
1054 | return; | |
1055 | } else { | |
1056 | CPC_TTY_DBG("%s: unregister the tty driver\n", cpc_tty->name); | |
1057 | if ((res=tty_unregister_driver(&serial_drv))) { | |
1058 | CPC_TTY_DBG("%s: ERROR ->unregister the tty driver error=%d\n", | |
1059 | cpc_tty->name,res); | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | CPC_TTY_LOCK(pc300dev->chan->card,flags); | |
1064 | cpc_tty->tty = NULL; | |
1065 | CPC_TTY_UNLOCK(pc300dev->chan->card, flags); | |
1066 | cpc_tty->tty_minor = 0; | |
1067 | cpc_tty->state = CPC_TTY_ST_IDLE; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * PC300 TTY trigger poll routine | |
1072 | * This routine is called by pc300driver to treats Tx interrupt. | |
1073 | */ | |
1074 | void cpc_tty_trigger_poll(pc300dev_t *pc300dev) | |
1075 | { | |
1076 | st_cpc_tty_area *cpc_tty = (st_cpc_tty_area *)pc300dev->cpc_tty; | |
1077 | if (!cpc_tty) { | |
1078 | return; | |
1079 | } | |
1080 | schedule_work(&(cpc_tty->tty_tx_work)); | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * PC300 TTY reset var routine | |
1085 | * This routine is called by pc300driver to init the TTY area. | |
1086 | */ | |
1087 | ||
1088 | void cpc_tty_reset_var(void) | |
1089 | { | |
1090 | int i ; | |
1091 | ||
1092 | CPC_TTY_DBG("hdlcX-tty: reset variables\n"); | |
1093 | /* reset the tty_driver structure - serial_drv */ | |
1094 | memset(&serial_drv, 0, sizeof(struct tty_driver)); | |
1095 | for (i=0; i < CPC_TTY_NPORTS; i++){ | |
1096 | memset(&cpc_tty_area[i],0, sizeof(st_cpc_tty_area)); | |
1097 | } | |
1098 | } |