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