?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / media / video / saa5249.c
blobd74caa139f0a733d190bb8cf8897bc82dc40d0bc
1 /*
2 * Modified in order to keep it compatible both with new and old videotext IOCTLs by
3 * Michael Geng <linux@MichaelGeng.de>
4 *
5 * Cleaned up to use existing videodev interface and allow the idea
6 * of multiple teletext decoders on the video4linux iface. Changed i2c
7 * to cover addressing clashes on device busses. It's also rebuilt so
8 * you can add arbitary multiple teletext devices to Linux video4linux
9 * now (well 32 anyway).
10 *
11 * Alan Cox <Alan.Cox@linux.org>
12 *
13 * The original driver was heavily modified to match the i2c interface
14 * It was truncated to use the WinTV boards, too.
15 *
16 * Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de>
17 *
18 * $Id: saa5249.c,v 1.1 1998/03/30 22:23:23 alan Exp $
19 *
20 * Derived From
21 *
22 * vtx.c:
23 * This is a loadable character-device-driver for videotext-interfaces
24 * (aka teletext). Please check the Makefile/README for a list of supported
25 * interfaces.
26 *
27 * Copyright (c) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de>
28 *
29 *
30 * This program is free software; you can redistribute it and/or modify
31 * it under the terms of the GNU General Public License as published by
32 * the Free Software Foundation; either version 2 of the License, or
33 * (at your option) any later version.
34 *
35 * This program is distributed in the hope that it will be useful,
36 * but WITHOUT ANY WARRANTY; without even the implied warranty of
37 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
38 * GNU General Public License for more details.
39 *
40 * You should have received a copy of the GNU General Public License
41 * along with this program; if not, write to the Free Software
42 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
43 * USA.
44 */
45
46 #include <linux/module.h>
47 #include <linux/kernel.h>
48 #include <linux/sched.h>
49 #include <linux/mm.h>
50 #include <linux/errno.h>
51 #include <linux/delay.h>
52 #include <linux/ioport.h>
53 #include <linux/slab.h>
54 #include <linux/init.h>
55 #include <stdarg.h>
56 #include <linux/i2c.h>
57 #include <linux/videotext.h>
58 #include <linux/videodev.h>
59
60 #include <asm/io.h>
61 #include <asm/uaccess.h>
62
63 #define VTX_VER_MAJ 1
64 #define VTX_VER_MIN 8
65
66
67
68 #define NUM_DAUS 4
69 #define NUM_BUFS 8
70 #define IF_NAME "SAA5249"
71
72 static const int disp_modes[8][3] =
73 {
74 { 0x46, 0x03, 0x03 }, /* DISPOFF */
75 { 0x46, 0xcc, 0xcc }, /* DISPNORM */
76 { 0x44, 0x0f, 0x0f }, /* DISPTRANS */
77 { 0x46, 0xcc, 0x46 }, /* DISPINS */
78 { 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */
79 { 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */
80 { 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */
81 { 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */
82 };
83
84
85
86 #define PAGE_WAIT (300*HZ/1000) /* Time between requesting page and */
87 /* checking status bits */
88 #define PGBUF_EXPIRE (15*HZ) /* Time to wait before retransmitting */
89 /* page regardless of infobits */
90 typedef struct {
91 u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */
92 u8 laststat[10]; /* Last value of infobits for DAU */
93 u8 sregs[7]; /* Page-request registers */
94 unsigned long expire; /* Time when page will be expired */
95 unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */
96 unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */
97 } vdau_t;
98
99 struct saa5249_device
100 {
101 vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */
102 /* real DAU, so we have to simulate some more) */
103 int vtx_use_count;
104 int is_searching[NUM_DAUS];
105 int disp_mode;
106 int virtual_mode;
107 struct i2c_client *client;
108 struct semaphore lock;
109 };
110
111
112 #define CCTWR 34 /* I²C write/read-address of vtx-chip */
113 #define CCTRD 35
114 #define NOACK_REPEAT 10 /* Retry access this many times on failure */
115 #define CLEAR_DELAY (HZ/20) /* Time required to clear a page */
116 #define READY_TIMEOUT (30*HZ/1000) /* Time to wait for ready signal of I²C-bus interface */
117 #define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */
118 #define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */
119
120 #define VTX_DEV_MINOR 0
121
122 /* General defines and debugging support */
123
124 #ifndef FALSE
125 #define FALSE 0
126 #define TRUE 1
127 #endif
128
129 #define RESCHED do { cond_resched(); } while(0)
130
131 static struct video_device saa_template; /* Declared near bottom */
132
133 /* Addresses to scan */
134 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
135 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
136 I2C_CLIENT_INSMOD;
137
138 static struct i2c_client client_template;
139
140 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
141 {
142 int pgbuf;
143 int err;
144 struct i2c_client *client;
145 struct video_device *vd;
146 struct saa5249_device *t;
147
148 printk(KERN_INFO "saa5249: teletext chip found.\n");
149 client=kmalloc(sizeof(*client), GFP_KERNEL);
150 if(client==NULL)
151 return -ENOMEM;
152 client_template.adapter = adap;
153 client_template.addr = addr;
154 memcpy(client, &client_template, sizeof(*client));
155 t = kmalloc(sizeof(*t), GFP_KERNEL);
156 if(t==NULL)
157 {
158 kfree(client);
159 return -ENOMEM;
160 }
161 memset(t, 0, sizeof(*t));
162 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
163 init_MUTEX(&t->lock);
164
165 /*
166 * Now create a video4linux device
167 */
168
169 vd = (struct video_device *)kmalloc(sizeof(struct video_device), GFP_KERNEL);
170 if(vd==NULL)
171 {
172 kfree(t);
173 kfree(client);
174 return -ENOMEM;
175 }
176 i2c_set_clientdata(client, vd);
177 memcpy(vd, &saa_template, sizeof(*vd));
178
179 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
180 {
181 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
182 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
183 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
184 t->vdau[pgbuf].expire = 0;
185 t->vdau[pgbuf].clrfound = TRUE;
186 t->vdau[pgbuf].stopped = TRUE;
187 t->is_searching[pgbuf] = FALSE;
188 }
189 vd->priv=t;
190
191
192 /*
193 * Register it
194 */
195
196 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
197 {
198 kfree(t);
199 kfree(vd);
200 kfree(client);
201 return err;
202 }
203 t->client = client;
204 i2c_attach_client(client);
205 return 0;
206 }
207
208 /*
209 * We do most of the hard work when we become a device on the i2c.
210 */
211
212 static int saa5249_probe(struct i2c_adapter *adap)
213 {
214 if (adap->class & I2C_CLASS_TV_ANALOG)
215 return i2c_probe(adap, &addr_data, saa5249_attach);
216 return 0;
217 }
218
219 static int saa5249_detach(struct i2c_client *client)
220 {
221 struct video_device *vd = i2c_get_clientdata(client);
222 i2c_detach_client(client);
223 video_unregister_device(vd);
224 kfree(vd->priv);
225 kfree(vd);
226 kfree(client);
227 return 0;
228 }
229
230 static int saa5249_command(struct i2c_client *device,
231 unsigned int cmd, void *arg)
232 {
233 return -EINVAL;
234 }
235
236 /* new I2C driver support */
237
238 static struct i2c_driver i2c_driver_videotext =
239 {
240 .owner = THIS_MODULE,
241 .name = IF_NAME, /* name */
242 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
243 .flags = I2C_DF_NOTIFY,
244 .attach_adapter = saa5249_probe,
245 .detach_client = saa5249_detach,
246 .command = saa5249_command
247 };
248
249 static struct i2c_client client_template = {
250 .driver = &i2c_driver_videotext,
251 .name = "(unset)",
252 };
253
254 /*
255 * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
256 * delay may be longer.
257 */
258
259 static void jdelay(unsigned long delay)
260 {
261 sigset_t oldblocked = current->blocked;
262
263 spin_lock_irq(&current->sighand->siglock);
264 sigfillset(&current->blocked);
265 recalc_sigpending();
266 spin_unlock_irq(&current->sighand->siglock);
267 msleep_interruptible(jiffies_to_msecs(delay));
268
269 spin_lock_irq(&current->sighand->siglock);
270 current->blocked = oldblocked;
271 recalc_sigpending();
272 spin_unlock_irq(&current->sighand->siglock);
273 }
274
275
276 /*
277 * I2C interfaces
278 */
279
280 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
281 {
282 char buf[64];
283
284 buf[0] = reg;
285 memcpy(buf+1, data, count);
286
287 if(i2c_master_send(t->client, buf, count+1)==count+1)
288 return 0;
289 return -1;
290 }
291
292 static int i2c_senddata(struct saa5249_device *t, ...)
293 {
294 unsigned char buf[64];
295 int v;
296 int ct=0;
297 va_list argp;
298 va_start(argp,t);
299
300 while((v=va_arg(argp,int))!=-1)
301 buf[ct++]=v;
302 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
303 }
304
305 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
306 * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
307 * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
308 * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
309 */
310
311 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
312 {
313 if(i2c_master_recv(t->client, buf, count)!=count)
314 return -1;
315 return 0;
316 }
317
318
319 /*
320 * Standard character-device-driver functions
321 */
322
323 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
324 unsigned int cmd, void *arg)
325 {
326 static int virtual_mode = FALSE;
327 struct video_device *vd = video_devdata(file);
328 struct saa5249_device *t=vd->priv;
329
330 switch(cmd)
331 {
332 case VTXIOCGETINFO:
333 {
334 vtx_info_t *info = arg;
335 info->version_major = VTX_VER_MAJ;
336 info->version_minor = VTX_VER_MIN;
337 info->numpages = NUM_DAUS;
338 /*info->cct_type = CCT_TYPE;*/
339 return 0;
340 }
341
342 case VTXIOCCLRPAGE:
343 {
344 vtx_pagereq_t *req = arg;
345
346 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
347 return -EINVAL;
348 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
349 t->vdau[req->pgbuf].clrfound = TRUE;
350 return 0;
351 }
352
353 case VTXIOCCLRFOUND:
354 {
355 vtx_pagereq_t *req = arg;
356
357 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
358 return -EINVAL;
359 t->vdau[req->pgbuf].clrfound = TRUE;
360 return 0;
361 }
362
363 case VTXIOCPAGEREQ:
364 {
365 vtx_pagereq_t *req = arg;
366 if (!(req->pagemask & PGMASK_PAGE))
367 req->page = 0;
368 if (!(req->pagemask & PGMASK_HOUR))
369 req->hour = 0;
370 if (!(req->pagemask & PGMASK_MINUTE))
371 req->minute = 0;
372 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
373 return -EINVAL;
374 req->page &= 0x7ff;
375 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
376 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
377 return -EINVAL;
378 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
379 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
380 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
381 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
382 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
383 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
384 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
385 t->vdau[req->pgbuf].stopped = FALSE;
386 t->vdau[req->pgbuf].clrfound = TRUE;
387 t->is_searching[req->pgbuf] = TRUE;
388 return 0;
389 }
390
391 case VTXIOCGETSTAT:
392 {
393 vtx_pagereq_t *req = arg;
394 u8 infobits[10];
395 vtx_pageinfo_t info;
396 int a;
397
398 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
399 return -EINVAL;
400 if (!t->vdau[req->pgbuf].stopped)
401 {
402 if (i2c_senddata(t, 2, 0, -1) ||
403 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
404 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
405 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
406 i2c_senddata(t, 8, 0, 25, 0, -1))
407 return -EIO;
408 jdelay(PAGE_WAIT);
409 if (i2c_getdata(t, 10, infobits))
410 return -EIO;
411
412 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
413 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
414 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
415 { /* check if new page arrived */
416 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
417 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
418 return -EIO;
419 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
420 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
421 if (t->virtual_mode)
422 {
423 /* Packet X/24 */
424 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
425 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
426 return -EIO;
427 /* Packet X/27/0 */
428 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
429 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
430 return -EIO;
431 /* Packet 8/30/0...8/30/15
432 * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
433 * so we should undo this here.
434 */
435 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
436 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
437 return -EIO;
438 }
439 t->vdau[req->pgbuf].clrfound = FALSE;
440 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
441 }
442 else
443 {
444 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
445 }
446 }
447 else
448 {
449 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
450 }
451
452 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
453 if (info.pagenum < 0x100)
454 info.pagenum += 0x800;
455 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
456 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
457 info.charset = ((infobits[7] >> 1) & 7);
458 info.delete = !!(infobits[3] & 8);
459 info.headline = !!(infobits[5] & 4);
460 info.subtitle = !!(infobits[5] & 8);
461 info.supp_header = !!(infobits[6] & 1);
462 info.update = !!(infobits[6] & 2);
463 info.inter_seq = !!(infobits[6] & 4);
464 info.dis_disp = !!(infobits[6] & 8);
465 info.serial = !!(infobits[7] & 1);
466 info.notfound = !!(infobits[8] & 0x10);
467 info.pblf = !!(infobits[9] & 0x20);
468 info.hamming = 0;
469 for (a = 0; a <= 7; a++)
470 {
471 if (infobits[a] & 0xf0)
472 {
473 info.hamming = 1;
474 break;
475 }
476 }
477 if (t->vdau[req->pgbuf].clrfound)
478 info.notfound = 1;
479 if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
480 return -EFAULT;
481 if (!info.hamming && !info.notfound)
482 {
483 t->is_searching[req->pgbuf] = FALSE;
484 }
485 return 0;
486 }
487
488 case VTXIOCGETPAGE:
489 {
490 vtx_pagereq_t *req = arg;
491 int start, end;
492
493 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
494 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
495 return -EINVAL;
496 if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
497 return -EFAULT;
498
499 /*
500 * Always read the time directly from SAA5249
501 */
502
503 if (req->start <= 39 && req->end >= 32)
504 {
505 int len;
506 char buf[16];
507 start = max(req->start, 32);
508 end = min(req->end, 39);
509 len=end-start+1;
510 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
511 i2c_getdata(t, len, buf))
512 return -EIO;
513 if(copy_to_user(req->buffer+start-req->start, buf, len))
514 return -EFAULT;
515 }
516 /* Insert the current header if DAU is still searching for a page */
517 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
518 {
519 char buf[32];
520 int len;
521 start = max(req->start, 7);
522 end = min(req->end, 31);
523 len=end-start+1;
524 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
525 i2c_getdata(t, len, buf))
526 return -EIO;
527 if(copy_to_user(req->buffer+start-req->start, buf, len))
528 return -EFAULT;
529 }
530 return 0;
531 }
532
533 case VTXIOCSTOPDAU:
534 {
535 vtx_pagereq_t *req = arg;
536
537 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
538 return -EINVAL;
539 t->vdau[req->pgbuf].stopped = TRUE;
540 t->is_searching[req->pgbuf] = FALSE;
541 return 0;
542 }
543
544 case VTXIOCPUTPAGE:
545 case VTXIOCSETDISP:
546 case VTXIOCPUTSTAT:
547 return 0;
548
549 case VTXIOCCLRCACHE:
550 {
551 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
552 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
553 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
554 return -EIO;
555 if (i2c_senddata(t, 3, 0x20, -1))
556 return -EIO;
557 jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
558 return 0;
559 }
560
561 case VTXIOCSETVIRT:
562 {
563 /* The SAA5249 has virtual-row reception turned on always */
564 t->virtual_mode = (int)(long)arg;
565 return 0;
566 }
567 }
568 return -EINVAL;
569 }
570
571 /*
572 * Translates old vtx IOCTLs to new ones
573 *
574 * This keeps new kernel versions compatible with old userspace programs.
575 */
576 static inline unsigned int vtx_fix_command(unsigned int cmd)
577 {
578 switch (cmd) {
579 case VTXIOCGETINFO_OLD:
580 cmd = VTXIOCGETINFO;
581 break;
582 case VTXIOCCLRPAGE_OLD:
583 cmd = VTXIOCCLRPAGE;
584 break;
585 case VTXIOCCLRFOUND_OLD:
586 cmd = VTXIOCCLRFOUND;
587 break;
588 case VTXIOCPAGEREQ_OLD:
589 cmd = VTXIOCPAGEREQ;
590 break;
591 case VTXIOCGETSTAT_OLD:
592 cmd = VTXIOCGETSTAT;
593 break;
594 case VTXIOCGETPAGE_OLD:
595 cmd = VTXIOCGETPAGE;
596 break;
597 case VTXIOCSTOPDAU_OLD:
598 cmd = VTXIOCSTOPDAU;
599 break;
600 case VTXIOCPUTPAGE_OLD:
601 cmd = VTXIOCPUTPAGE;
602 break;
603 case VTXIOCSETDISP_OLD:
604 cmd = VTXIOCSETDISP;
605 break;
606 case VTXIOCPUTSTAT_OLD:
607 cmd = VTXIOCPUTSTAT;
608 break;
609 case VTXIOCCLRCACHE_OLD:
610 cmd = VTXIOCCLRCACHE;
611 break;
612 case VTXIOCSETVIRT_OLD:
613 cmd = VTXIOCSETVIRT;
614 break;
615 }
616 return cmd;
617 }
618
619 /*
620 * Handle the locking
621 */
622
623 static int saa5249_ioctl(struct inode *inode, struct file *file,
624 unsigned int cmd, unsigned long arg)
625 {
626 struct video_device *vd = video_devdata(file);
627 struct saa5249_device *t=vd->priv;
628 int err;
629
630 cmd = vtx_fix_command(cmd);
631 down(&t->lock);
632 err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
633 up(&t->lock);
634 return err;
635 }
636
637 static int saa5249_open(struct inode *inode, struct file *file)
638 {
639 struct video_device *vd = video_devdata(file);
640 struct saa5249_device *t=vd->priv;
641 int err,pgbuf;
642
643 err = video_exclusive_open(inode,file);
644 if (err < 0)
645 return err;
646
647 if (t->client==NULL) {
648 err = -ENODEV;
649 goto fail;
650 }
651
652 if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
653 /* Turn off parity checks (we do this ourselves) */
654 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
655 /* Display TV-picture, no virtual rows */
656 i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) /* Set display to page 4 */
657
658 {
659 err = -EIO;
660 goto fail;
661 }
662
663 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
664 {
665 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
666 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
667 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
668 t->vdau[pgbuf].expire = 0;
669 t->vdau[pgbuf].clrfound = TRUE;
670 t->vdau[pgbuf].stopped = TRUE;
671 t->is_searching[pgbuf] = FALSE;
672 }
673 t->virtual_mode=FALSE;
674 return 0;
675
676 fail:
677 video_exclusive_release(inode,file);
678 return err;
679 }
680
681
682
683 static int saa5249_release(struct inode *inode, struct file *file)
684 {
685 struct video_device *vd = video_devdata(file);
686 struct saa5249_device *t=vd->priv;
687 i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
688 i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
689 video_exclusive_release(inode,file);
690 return 0;
691 }
692
693 static int __init init_saa_5249 (void)
694 {
695 printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
696 VTX_VER_MAJ, VTX_VER_MIN);
697 return i2c_add_driver(&i2c_driver_videotext);
698 }
699
700 static void __exit cleanup_saa_5249 (void)
701 {
702 i2c_del_driver(&i2c_driver_videotext);
703 }
704
705 module_init(init_saa_5249);
706 module_exit(cleanup_saa_5249);
707
708 static struct file_operations saa_fops = {
709 .owner = THIS_MODULE,
710 .open = saa5249_open,
711 .release = saa5249_release,
712 .ioctl = saa5249_ioctl,
713 .llseek = no_llseek,
714 };
715
716 static struct video_device saa_template =
717 {
718 .owner = THIS_MODULE,
719 .name = IF_NAME,
720 .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
721 .hardware = VID_HARDWARE_SAA5249,
722 .fops = &saa_fops,
723 };
724
725 MODULE_LICENSE("GPL");
Verdex Pro support