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[PATCH] pr_debug: umem: repair nonexistant bh pr_debug reference
[linux-2.6/verdex.git] / drivers / media / video / saa5249.c
blobbb3fb4387f6500ff04dbadf0e003336798c41dd2
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 #include <media/v4l2-common.h>
60 #include <linux/mutex.h>
61
62
63 #include <asm/io.h>
64 #include <asm/uaccess.h>
65
66 #define VTX_VER_MAJ 1
67 #define VTX_VER_MIN 8
68
69
70
71 #define NUM_DAUS 4
72 #define NUM_BUFS 8
73 #define IF_NAME "SAA5249"
74
75 static const int disp_modes[8][3] =
76 {
77 { 0x46, 0x03, 0x03 }, /* DISPOFF */
78 { 0x46, 0xcc, 0xcc }, /* DISPNORM */
79 { 0x44, 0x0f, 0x0f }, /* DISPTRANS */
80 { 0x46, 0xcc, 0x46 }, /* DISPINS */
81 { 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */
82 { 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */
83 { 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */
84 { 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */
85 };
86
87
88
89 #define PAGE_WAIT (300*HZ/1000) /* Time between requesting page and */
90 /* checking status bits */
91 #define PGBUF_EXPIRE (15*HZ) /* Time to wait before retransmitting */
92 /* page regardless of infobits */
93 typedef struct {
94 u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */
95 u8 laststat[10]; /* Last value of infobits for DAU */
96 u8 sregs[7]; /* Page-request registers */
97 unsigned long expire; /* Time when page will be expired */
98 unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */
99 unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */
100 } vdau_t;
101
102 struct saa5249_device
103 {
104 vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */
105 /* real DAU, so we have to simulate some more) */
106 int vtx_use_count;
107 int is_searching[NUM_DAUS];
108 int disp_mode;
109 int virtual_mode;
110 struct i2c_client *client;
111 struct mutex lock;
112 };
113
114
115 #define CCTWR 34 /* I²C write/read-address of vtx-chip */
116 #define CCTRD 35
117 #define NOACK_REPEAT 10 /* Retry access this many times on failure */
118 #define CLEAR_DELAY (HZ/20) /* Time required to clear a page */
119 #define READY_TIMEOUT (30*HZ/1000) /* Time to wait for ready signal of I²C-bus interface */
120 #define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */
121 #define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */
122
123 #define VTX_DEV_MINOR 0
124
125 /* General defines and debugging support */
126
127 #ifndef FALSE
128 #define FALSE 0
129 #define TRUE 1
130 #endif
131
132 #define RESCHED do { cond_resched(); } while(0)
133
134 static struct video_device saa_template; /* Declared near bottom */
135
136 /* Addresses to scan */
137 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
138 I2C_CLIENT_INSMOD;
139
140 static struct i2c_client client_template;
141
142 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
143 {
144 int pgbuf;
145 int err;
146 struct i2c_client *client;
147 struct video_device *vd;
148 struct saa5249_device *t;
149
150 printk(KERN_INFO "saa5249: teletext chip found.\n");
151 client=kmalloc(sizeof(*client), GFP_KERNEL);
152 if(client==NULL)
153 return -ENOMEM;
154 client_template.adapter = adap;
155 client_template.addr = addr;
156 memcpy(client, &client_template, sizeof(*client));
157 t = kzalloc(sizeof(*t), GFP_KERNEL);
158 if(t==NULL)
159 {
160 kfree(client);
161 return -ENOMEM;
162 }
163 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
164 mutex_init(&t->lock);
165
166 /*
167 * Now create a video4linux device
168 */
169
170 vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
171 if(vd==NULL)
172 {
173 kfree(t);
174 kfree(client);
175 return -ENOMEM;
176 }
177 i2c_set_clientdata(client, vd);
178 memcpy(vd, &saa_template, sizeof(*vd));
179
180 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
181 {
182 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
183 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
184 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
185 t->vdau[pgbuf].expire = 0;
186 t->vdau[pgbuf].clrfound = TRUE;
187 t->vdau[pgbuf].stopped = TRUE;
188 t->is_searching[pgbuf] = FALSE;
189 }
190 vd->priv=t;
191
192
193 /*
194 * Register it
195 */
196
197 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
198 {
199 kfree(t);
200 kfree(vd);
201 kfree(client);
202 return err;
203 }
204 t->client = client;
205 i2c_attach_client(client);
206 return 0;
207 }
208
209 /*
210 * We do most of the hard work when we become a device on the i2c.
211 */
212
213 static int saa5249_probe(struct i2c_adapter *adap)
214 {
215 if (adap->class & I2C_CLASS_TV_ANALOG)
216 return i2c_probe(adap, &addr_data, saa5249_attach);
217 return 0;
218 }
219
220 static int saa5249_detach(struct i2c_client *client)
221 {
222 struct video_device *vd = i2c_get_clientdata(client);
223 i2c_detach_client(client);
224 video_unregister_device(vd);
225 kfree(vd->priv);
226 kfree(vd);
227 kfree(client);
228 return 0;
229 }
230
231 /* new I2C driver support */
232
233 static struct i2c_driver i2c_driver_videotext =
234 {
235 .driver = {
236 .name = IF_NAME, /* name */
237 },
238 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
239 .attach_adapter = saa5249_probe,
240 .detach_client = saa5249_detach,
241 };
242
243 static struct i2c_client client_template = {
244 .driver = &i2c_driver_videotext,
245 .name = "(unset)",
246 };
247
248 /*
249 * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
250 * delay may be longer.
251 */
252
253 static void jdelay(unsigned long delay)
254 {
255 sigset_t oldblocked = current->blocked;
256
257 spin_lock_irq(&current->sighand->siglock);
258 sigfillset(&current->blocked);
259 recalc_sigpending();
260 spin_unlock_irq(&current->sighand->siglock);
261 msleep_interruptible(jiffies_to_msecs(delay));
262
263 spin_lock_irq(&current->sighand->siglock);
264 current->blocked = oldblocked;
265 recalc_sigpending();
266 spin_unlock_irq(&current->sighand->siglock);
267 }
268
269
270 /*
271 * I2C interfaces
272 */
273
274 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
275 {
276 char buf[64];
277
278 buf[0] = reg;
279 memcpy(buf+1, data, count);
280
281 if(i2c_master_send(t->client, buf, count+1)==count+1)
282 return 0;
283 return -1;
284 }
285
286 static int i2c_senddata(struct saa5249_device *t, ...)
287 {
288 unsigned char buf[64];
289 int v;
290 int ct=0;
291 va_list argp;
292 va_start(argp,t);
293
294 while((v=va_arg(argp,int))!=-1)
295 buf[ct++]=v;
296 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
297 }
298
299 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
300 * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
301 * sending of data. If uaccess is TRUE, data is written to user-space with put_user.
302 * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
303 */
304
305 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
306 {
307 if(i2c_master_recv(t->client, buf, count)!=count)
308 return -1;
309 return 0;
310 }
311
312
313 /*
314 * Standard character-device-driver functions
315 */
316
317 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
318 unsigned int cmd, void *arg)
319 {
320 static int virtual_mode = FALSE;
321 struct video_device *vd = video_devdata(file);
322 struct saa5249_device *t=vd->priv;
323
324 switch(cmd)
325 {
326 case VTXIOCGETINFO:
327 {
328 vtx_info_t *info = arg;
329 info->version_major = VTX_VER_MAJ;
330 info->version_minor = VTX_VER_MIN;
331 info->numpages = NUM_DAUS;
332 /*info->cct_type = CCT_TYPE;*/
333 return 0;
334 }
335
336 case VTXIOCCLRPAGE:
337 {
338 vtx_pagereq_t *req = arg;
339
340 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
341 return -EINVAL;
342 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
343 t->vdau[req->pgbuf].clrfound = TRUE;
344 return 0;
345 }
346
347 case VTXIOCCLRFOUND:
348 {
349 vtx_pagereq_t *req = arg;
350
351 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
352 return -EINVAL;
353 t->vdau[req->pgbuf].clrfound = TRUE;
354 return 0;
355 }
356
357 case VTXIOCPAGEREQ:
358 {
359 vtx_pagereq_t *req = arg;
360 if (!(req->pagemask & PGMASK_PAGE))
361 req->page = 0;
362 if (!(req->pagemask & PGMASK_HOUR))
363 req->hour = 0;
364 if (!(req->pagemask & PGMASK_MINUTE))
365 req->minute = 0;
366 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
367 return -EINVAL;
368 req->page &= 0x7ff;
369 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
370 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
371 return -EINVAL;
372 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
373 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
374 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
375 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
376 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
377 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
378 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
379 t->vdau[req->pgbuf].stopped = FALSE;
380 t->vdau[req->pgbuf].clrfound = TRUE;
381 t->is_searching[req->pgbuf] = TRUE;
382 return 0;
383 }
384
385 case VTXIOCGETSTAT:
386 {
387 vtx_pagereq_t *req = arg;
388 u8 infobits[10];
389 vtx_pageinfo_t info;
390 int a;
391
392 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
393 return -EINVAL;
394 if (!t->vdau[req->pgbuf].stopped)
395 {
396 if (i2c_senddata(t, 2, 0, -1) ||
397 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
398 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
399 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
400 i2c_senddata(t, 8, 0, 25, 0, -1))
401 return -EIO;
402 jdelay(PAGE_WAIT);
403 if (i2c_getdata(t, 10, infobits))
404 return -EIO;
405
406 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
407 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
408 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
409 { /* check if new page arrived */
410 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
411 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
412 return -EIO;
413 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
414 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
415 if (t->virtual_mode)
416 {
417 /* Packet X/24 */
418 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
419 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
420 return -EIO;
421 /* Packet X/27/0 */
422 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
423 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
424 return -EIO;
425 /* Packet 8/30/0...8/30/15
426 * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
427 * so we should undo this here.
428 */
429 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
430 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
431 return -EIO;
432 }
433 t->vdau[req->pgbuf].clrfound = FALSE;
434 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
435 }
436 else
437 {
438 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
439 }
440 }
441 else
442 {
443 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
444 }
445
446 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
447 if (info.pagenum < 0x100)
448 info.pagenum += 0x800;
449 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
450 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
451 info.charset = ((infobits[7] >> 1) & 7);
452 info.delete = !!(infobits[3] & 8);
453 info.headline = !!(infobits[5] & 4);
454 info.subtitle = !!(infobits[5] & 8);
455 info.supp_header = !!(infobits[6] & 1);
456 info.update = !!(infobits[6] & 2);
457 info.inter_seq = !!(infobits[6] & 4);
458 info.dis_disp = !!(infobits[6] & 8);
459 info.serial = !!(infobits[7] & 1);
460 info.notfound = !!(infobits[8] & 0x10);
461 info.pblf = !!(infobits[9] & 0x20);
462 info.hamming = 0;
463 for (a = 0; a <= 7; a++)
464 {
465 if (infobits[a] & 0xf0)
466 {
467 info.hamming = 1;
468 break;
469 }
470 }
471 if (t->vdau[req->pgbuf].clrfound)
472 info.notfound = 1;
473 if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
474 return -EFAULT;
475 if (!info.hamming && !info.notfound)
476 {
477 t->is_searching[req->pgbuf] = FALSE;
478 }
479 return 0;
480 }
481
482 case VTXIOCGETPAGE:
483 {
484 vtx_pagereq_t *req = arg;
485 int start, end;
486
487 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
488 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
489 return -EINVAL;
490 if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
491 return -EFAULT;
492
493 /*
494 * Always read the time directly from SAA5249
495 */
496
497 if (req->start <= 39 && req->end >= 32)
498 {
499 int len;
500 char buf[16];
501 start = max(req->start, 32);
502 end = min(req->end, 39);
503 len=end-start+1;
504 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
505 i2c_getdata(t, len, buf))
506 return -EIO;
507 if(copy_to_user(req->buffer+start-req->start, buf, len))
508 return -EFAULT;
509 }
510 /* Insert the current header if DAU is still searching for a page */
511 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
512 {
513 char buf[32];
514 int len;
515 start = max(req->start, 7);
516 end = min(req->end, 31);
517 len=end-start+1;
518 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
519 i2c_getdata(t, len, buf))
520 return -EIO;
521 if(copy_to_user(req->buffer+start-req->start, buf, len))
522 return -EFAULT;
523 }
524 return 0;
525 }
526
527 case VTXIOCSTOPDAU:
528 {
529 vtx_pagereq_t *req = arg;
530
531 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
532 return -EINVAL;
533 t->vdau[req->pgbuf].stopped = TRUE;
534 t->is_searching[req->pgbuf] = FALSE;
535 return 0;
536 }
537
538 case VTXIOCPUTPAGE:
539 case VTXIOCSETDISP:
540 case VTXIOCPUTSTAT:
541 return 0;
542
543 case VTXIOCCLRCACHE:
544 {
545 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
546 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
547 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
548 return -EIO;
549 if (i2c_senddata(t, 3, 0x20, -1))
550 return -EIO;
551 jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
552 return 0;
553 }
554
555 case VTXIOCSETVIRT:
556 {
557 /* The SAA5249 has virtual-row reception turned on always */
558 t->virtual_mode = (int)(long)arg;
559 return 0;
560 }
561 }
562 return -EINVAL;
563 }
564
565 /*
566 * Translates old vtx IOCTLs to new ones
567 *
568 * This keeps new kernel versions compatible with old userspace programs.
569 */
570 static inline unsigned int vtx_fix_command(unsigned int cmd)
571 {
572 switch (cmd) {
573 case VTXIOCGETINFO_OLD:
574 cmd = VTXIOCGETINFO;
575 break;
576 case VTXIOCCLRPAGE_OLD:
577 cmd = VTXIOCCLRPAGE;
578 break;
579 case VTXIOCCLRFOUND_OLD:
580 cmd = VTXIOCCLRFOUND;
581 break;
582 case VTXIOCPAGEREQ_OLD:
583 cmd = VTXIOCPAGEREQ;
584 break;
585 case VTXIOCGETSTAT_OLD:
586 cmd = VTXIOCGETSTAT;
587 break;
588 case VTXIOCGETPAGE_OLD:
589 cmd = VTXIOCGETPAGE;
590 break;
591 case VTXIOCSTOPDAU_OLD:
592 cmd = VTXIOCSTOPDAU;
593 break;
594 case VTXIOCPUTPAGE_OLD:
595 cmd = VTXIOCPUTPAGE;
596 break;
597 case VTXIOCSETDISP_OLD:
598 cmd = VTXIOCSETDISP;
599 break;
600 case VTXIOCPUTSTAT_OLD:
601 cmd = VTXIOCPUTSTAT;
602 break;
603 case VTXIOCCLRCACHE_OLD:
604 cmd = VTXIOCCLRCACHE;
605 break;
606 case VTXIOCSETVIRT_OLD:
607 cmd = VTXIOCSETVIRT;
608 break;
609 }
610 return cmd;
611 }
612
613 /*
614 * Handle the locking
615 */
616
617 static int saa5249_ioctl(struct inode *inode, struct file *file,
618 unsigned int cmd, unsigned long arg)
619 {
620 struct video_device *vd = video_devdata(file);
621 struct saa5249_device *t=vd->priv;
622 int err;
623
624 cmd = vtx_fix_command(cmd);
625 mutex_lock(&t->lock);
626 err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
627 mutex_unlock(&t->lock);
628 return err;
629 }
630
631 static int saa5249_open(struct inode *inode, struct file *file)
632 {
633 struct video_device *vd = video_devdata(file);
634 struct saa5249_device *t=vd->priv;
635 int err,pgbuf;
636
637 err = video_exclusive_open(inode,file);
638 if (err < 0)
639 return err;
640
641 if (t->client==NULL) {
642 err = -ENODEV;
643 goto fail;
644 }
645
646 if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
647 /* Turn off parity checks (we do this ourselves) */
648 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
649 /* Display TV-picture, no virtual rows */
650 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 */
651
652 {
653 err = -EIO;
654 goto fail;
655 }
656
657 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
658 {
659 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
660 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
661 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
662 t->vdau[pgbuf].expire = 0;
663 t->vdau[pgbuf].clrfound = TRUE;
664 t->vdau[pgbuf].stopped = TRUE;
665 t->is_searching[pgbuf] = FALSE;
666 }
667 t->virtual_mode=FALSE;
668 return 0;
669
670 fail:
671 video_exclusive_release(inode,file);
672 return err;
673 }
674
675
676
677 static int saa5249_release(struct inode *inode, struct file *file)
678 {
679 struct video_device *vd = video_devdata(file);
680 struct saa5249_device *t=vd->priv;
681 i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
682 i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
683 video_exclusive_release(inode,file);
684 return 0;
685 }
686
687 static int __init init_saa_5249 (void)
688 {
689 printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
690 VTX_VER_MAJ, VTX_VER_MIN);
691 return i2c_add_driver(&i2c_driver_videotext);
692 }
693
694 static void __exit cleanup_saa_5249 (void)
695 {
696 i2c_del_driver(&i2c_driver_videotext);
697 }
698
699 module_init(init_saa_5249);
700 module_exit(cleanup_saa_5249);
701
702 static struct file_operations saa_fops = {
703 .owner = THIS_MODULE,
704 .open = saa5249_open,
705 .release = saa5249_release,
706 .ioctl = saa5249_ioctl,
707 .compat_ioctl = v4l_compat_ioctl32,
708 .llseek = no_llseek,
709 };
710
711 static struct video_device saa_template =
712 {
713 .owner = THIS_MODULE,
714 .name = IF_NAME,
715 .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
716 .fops = &saa_fops,
717 };
718
719 MODULE_LICENSE("GPL");
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