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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
[wrt350n-kernel.git] / drivers / media / video / saa5249.c
blobf55d6e85f20f34c59d93e4ae9a5f70c59ecd0a32
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 msecs_to_jiffies(300) /* Time between requesting page and */
90 /* checking status bits */
91 #define PGBUF_EXPIRE msecs_to_jiffies(15000) /* 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 msecs_to_jiffies(50) /* Time required to clear a page */
119 #define READY_TIMEOUT msecs_to_jiffies(30) /* 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 #define RESCHED do { cond_resched(); } while(0)
128
129 static struct video_device saa_template; /* Declared near bottom */
130
131 /* Addresses to scan */
132 static unsigned short normal_i2c[] = {34>>1,I2C_CLIENT_END};
133 I2C_CLIENT_INSMOD;
134
135 static struct i2c_client client_template;
136
137 static int saa5249_attach(struct i2c_adapter *adap, int addr, int kind)
138 {
139 int pgbuf;
140 int err;
141 struct i2c_client *client;
142 struct video_device *vd;
143 struct saa5249_device *t;
144
145 printk(KERN_INFO "saa5249: teletext chip found.\n");
146 client=kmalloc(sizeof(*client), GFP_KERNEL);
147 if(client==NULL)
148 return -ENOMEM;
149 client_template.adapter = adap;
150 client_template.addr = addr;
151 memcpy(client, &client_template, sizeof(*client));
152 t = kzalloc(sizeof(*t), GFP_KERNEL);
153 if(t==NULL)
154 {
155 kfree(client);
156 return -ENOMEM;
157 }
158 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
159 mutex_init(&t->lock);
160
161 /*
162 * Now create a video4linux device
163 */
164
165 vd = kmalloc(sizeof(struct video_device), GFP_KERNEL);
166 if(vd==NULL)
167 {
168 kfree(t);
169 kfree(client);
170 return -ENOMEM;
171 }
172 i2c_set_clientdata(client, vd);
173 memcpy(vd, &saa_template, sizeof(*vd));
174
175 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
176 {
177 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
178 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
179 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
180 t->vdau[pgbuf].expire = 0;
181 t->vdau[pgbuf].clrfound = true;
182 t->vdau[pgbuf].stopped = true;
183 t->is_searching[pgbuf] = false;
184 }
185 vd->priv=t;
186
187
188 /*
189 * Register it
190 */
191
192 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
193 {
194 kfree(t);
195 kfree(vd);
196 kfree(client);
197 return err;
198 }
199 t->client = client;
200 i2c_attach_client(client);
201 return 0;
202 }
203
204 /*
205 * We do most of the hard work when we become a device on the i2c.
206 */
207
208 static int saa5249_probe(struct i2c_adapter *adap)
209 {
210 if (adap->class & I2C_CLASS_TV_ANALOG)
211 return i2c_probe(adap, &addr_data, saa5249_attach);
212 return 0;
213 }
214
215 static int saa5249_detach(struct i2c_client *client)
216 {
217 struct video_device *vd = i2c_get_clientdata(client);
218 i2c_detach_client(client);
219 video_unregister_device(vd);
220 kfree(vd->priv);
221 kfree(vd);
222 kfree(client);
223 return 0;
224 }
225
226 /* new I2C driver support */
227
228 static struct i2c_driver i2c_driver_videotext =
229 {
230 .driver = {
231 .name = IF_NAME, /* name */
232 },
233 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
234 .attach_adapter = saa5249_probe,
235 .detach_client = saa5249_detach,
236 };
237
238 static struct i2c_client client_template = {
239 .driver = &i2c_driver_videotext,
240 .name = "(unset)",
241 };
242
243 /*
244 * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
245 * delay may be longer.
246 */
247
248 static void jdelay(unsigned long delay)
249 {
250 sigset_t oldblocked = current->blocked;
251
252 spin_lock_irq(&current->sighand->siglock);
253 sigfillset(&current->blocked);
254 recalc_sigpending();
255 spin_unlock_irq(&current->sighand->siglock);
256 msleep_interruptible(jiffies_to_msecs(delay));
257
258 spin_lock_irq(&current->sighand->siglock);
259 current->blocked = oldblocked;
260 recalc_sigpending();
261 spin_unlock_irq(&current->sighand->siglock);
262 }
263
264
265 /*
266 * I2C interfaces
267 */
268
269 static int i2c_sendbuf(struct saa5249_device *t, int reg, int count, u8 *data)
270 {
271 char buf[64];
272
273 buf[0] = reg;
274 memcpy(buf+1, data, count);
275
276 if(i2c_master_send(t->client, buf, count+1)==count+1)
277 return 0;
278 return -1;
279 }
280
281 static int i2c_senddata(struct saa5249_device *t, ...)
282 {
283 unsigned char buf[64];
284 int v;
285 int ct = 0;
286 va_list argp;
287 va_start(argp,t);
288
289 while ((v = va_arg(argp, int)) != -1)
290 buf[ct++] = v;
291
292 va_end(argp);
293 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
294 }
295
296 /* Get count number of bytes from I²C-device at address adr, store them in buf. Start & stop
297 * handshaking is done by this routine, ack will be sent after the last byte to inhibit further
298 * sending of data. If uaccess is 'true', data is written to user-space with put_user.
299 * Returns -1 if I²C-device didn't send acknowledge, 0 otherwise
300 */
301
302 static int i2c_getdata(struct saa5249_device *t, int count, u8 *buf)
303 {
304 if(i2c_master_recv(t->client, buf, count)!=count)
305 return -1;
306 return 0;
307 }
308
309
310 /*
311 * Standard character-device-driver functions
312 */
313
314 static int do_saa5249_ioctl(struct inode *inode, struct file *file,
315 unsigned int cmd, void *arg)
316 {
317 static int virtual_mode = false;
318 struct video_device *vd = video_devdata(file);
319 struct saa5249_device *t=vd->priv;
320
321 switch(cmd)
322 {
323 case VTXIOCGETINFO:
324 {
325 vtx_info_t *info = arg;
326 info->version_major = VTX_VER_MAJ;
327 info->version_minor = VTX_VER_MIN;
328 info->numpages = NUM_DAUS;
329 /*info->cct_type = CCT_TYPE;*/
330 return 0;
331 }
332
333 case VTXIOCCLRPAGE:
334 {
335 vtx_pagereq_t *req = arg;
336
337 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
338 return -EINVAL;
339 memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
340 t->vdau[req->pgbuf].clrfound = true;
341 return 0;
342 }
343
344 case VTXIOCCLRFOUND:
345 {
346 vtx_pagereq_t *req = arg;
347
348 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
349 return -EINVAL;
350 t->vdau[req->pgbuf].clrfound = true;
351 return 0;
352 }
353
354 case VTXIOCPAGEREQ:
355 {
356 vtx_pagereq_t *req = arg;
357 if (!(req->pagemask & PGMASK_PAGE))
358 req->page = 0;
359 if (!(req->pagemask & PGMASK_HOUR))
360 req->hour = 0;
361 if (!(req->pagemask & PGMASK_MINUTE))
362 req->minute = 0;
363 if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
364 return -EINVAL;
365 req->page &= 0x7ff;
366 if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
367 req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
368 return -EINVAL;
369 t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
370 t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
371 t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
372 t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
373 t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
374 t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
375 t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
376 t->vdau[req->pgbuf].stopped = false;
377 t->vdau[req->pgbuf].clrfound = true;
378 t->is_searching[req->pgbuf] = true;
379 return 0;
380 }
381
382 case VTXIOCGETSTAT:
383 {
384 vtx_pagereq_t *req = arg;
385 u8 infobits[10];
386 vtx_pageinfo_t info;
387 int a;
388
389 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
390 return -EINVAL;
391 if (!t->vdau[req->pgbuf].stopped)
392 {
393 if (i2c_senddata(t, 2, 0, -1) ||
394 i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
395 i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
396 i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
397 i2c_senddata(t, 8, 0, 25, 0, -1))
398 return -EIO;
399 jdelay(PAGE_WAIT);
400 if (i2c_getdata(t, 10, infobits))
401 return -EIO;
402
403 if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
404 (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
405 time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
406 { /* check if new page arrived */
407 if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
408 i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
409 return -EIO;
410 t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
411 memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
412 if (t->virtual_mode)
413 {
414 /* Packet X/24 */
415 if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
416 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
417 return -EIO;
418 /* Packet X/27/0 */
419 if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
420 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
421 return -EIO;
422 /* Packet 8/30/0...8/30/15
423 * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
424 * so we should undo this here.
425 */
426 if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
427 i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
428 return -EIO;
429 }
430 t->vdau[req->pgbuf].clrfound = false;
431 memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
432 }
433 else
434 {
435 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
436 }
437 }
438 else
439 {
440 memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
441 }
442
443 info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
444 if (info.pagenum < 0x100)
445 info.pagenum += 0x800;
446 info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
447 info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
448 info.charset = ((infobits[7] >> 1) & 7);
449 info.delete = !!(infobits[3] & 8);
450 info.headline = !!(infobits[5] & 4);
451 info.subtitle = !!(infobits[5] & 8);
452 info.supp_header = !!(infobits[6] & 1);
453 info.update = !!(infobits[6] & 2);
454 info.inter_seq = !!(infobits[6] & 4);
455 info.dis_disp = !!(infobits[6] & 8);
456 info.serial = !!(infobits[7] & 1);
457 info.notfound = !!(infobits[8] & 0x10);
458 info.pblf = !!(infobits[9] & 0x20);
459 info.hamming = 0;
460 for (a = 0; a <= 7; a++)
461 {
462 if (infobits[a] & 0xf0)
463 {
464 info.hamming = 1;
465 break;
466 }
467 }
468 if (t->vdau[req->pgbuf].clrfound)
469 info.notfound = 1;
470 if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
471 return -EFAULT;
472 if (!info.hamming && !info.notfound)
473 {
474 t->is_searching[req->pgbuf] = false;
475 }
476 return 0;
477 }
478
479 case VTXIOCGETPAGE:
480 {
481 vtx_pagereq_t *req = arg;
482 int start, end;
483
484 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
485 req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
486 return -EINVAL;
487 if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
488 return -EFAULT;
489
490 /*
491 * Always read the time directly from SAA5249
492 */
493
494 if (req->start <= 39 && req->end >= 32)
495 {
496 int len;
497 char buf[16];
498 start = max(req->start, 32);
499 end = min(req->end, 39);
500 len=end-start+1;
501 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
502 i2c_getdata(t, len, buf))
503 return -EIO;
504 if(copy_to_user(req->buffer+start-req->start, buf, len))
505 return -EFAULT;
506 }
507 /* Insert the current header if DAU is still searching for a page */
508 if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
509 {
510 char buf[32];
511 int len;
512 start = max(req->start, 7);
513 end = min(req->end, 31);
514 len=end-start+1;
515 if (i2c_senddata(t, 8, 0, 0, start, -1) ||
516 i2c_getdata(t, len, buf))
517 return -EIO;
518 if(copy_to_user(req->buffer+start-req->start, buf, len))
519 return -EFAULT;
520 }
521 return 0;
522 }
523
524 case VTXIOCSTOPDAU:
525 {
526 vtx_pagereq_t *req = arg;
527
528 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
529 return -EINVAL;
530 t->vdau[req->pgbuf].stopped = true;
531 t->is_searching[req->pgbuf] = false;
532 return 0;
533 }
534
535 case VTXIOCPUTPAGE:
536 case VTXIOCSETDISP:
537 case VTXIOCPUTSTAT:
538 return 0;
539
540 case VTXIOCCLRCACHE:
541 {
542 if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
543 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
544 ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
545 return -EIO;
546 if (i2c_senddata(t, 3, 0x20, -1))
547 return -EIO;
548 jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
549 return 0;
550 }
551
552 case VTXIOCSETVIRT:
553 {
554 /* The SAA5249 has virtual-row reception turned on always */
555 t->virtual_mode = (int)(long)arg;
556 return 0;
557 }
558 }
559 return -EINVAL;
560 }
561
562 /*
563 * Translates old vtx IOCTLs to new ones
564 *
565 * This keeps new kernel versions compatible with old userspace programs.
566 */
567 static inline unsigned int vtx_fix_command(unsigned int cmd)
568 {
569 switch (cmd) {
570 case VTXIOCGETINFO_OLD:
571 cmd = VTXIOCGETINFO;
572 break;
573 case VTXIOCCLRPAGE_OLD:
574 cmd = VTXIOCCLRPAGE;
575 break;
576 case VTXIOCCLRFOUND_OLD:
577 cmd = VTXIOCCLRFOUND;
578 break;
579 case VTXIOCPAGEREQ_OLD:
580 cmd = VTXIOCPAGEREQ;
581 break;
582 case VTXIOCGETSTAT_OLD:
583 cmd = VTXIOCGETSTAT;
584 break;
585 case VTXIOCGETPAGE_OLD:
586 cmd = VTXIOCGETPAGE;
587 break;
588 case VTXIOCSTOPDAU_OLD:
589 cmd = VTXIOCSTOPDAU;
590 break;
591 case VTXIOCPUTPAGE_OLD:
592 cmd = VTXIOCPUTPAGE;
593 break;
594 case VTXIOCSETDISP_OLD:
595 cmd = VTXIOCSETDISP;
596 break;
597 case VTXIOCPUTSTAT_OLD:
598 cmd = VTXIOCPUTSTAT;
599 break;
600 case VTXIOCCLRCACHE_OLD:
601 cmd = VTXIOCCLRCACHE;
602 break;
603 case VTXIOCSETVIRT_OLD:
604 cmd = VTXIOCSETVIRT;
605 break;
606 }
607 return cmd;
608 }
609
610 /*
611 * Handle the locking
612 */
613
614 static int saa5249_ioctl(struct inode *inode, struct file *file,
615 unsigned int cmd, unsigned long arg)
616 {
617 struct video_device *vd = video_devdata(file);
618 struct saa5249_device *t=vd->priv;
619 int err;
620
621 cmd = vtx_fix_command(cmd);
622 mutex_lock(&t->lock);
623 err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
624 mutex_unlock(&t->lock);
625 return err;
626 }
627
628 static int saa5249_open(struct inode *inode, struct file *file)
629 {
630 struct video_device *vd = video_devdata(file);
631 struct saa5249_device *t=vd->priv;
632 int err,pgbuf;
633
634 err = video_exclusive_open(inode,file);
635 if (err < 0)
636 return err;
637
638 if (t->client==NULL) {
639 err = -ENODEV;
640 goto fail;
641 }
642
643 if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
644 /* Turn off parity checks (we do this ourselves) */
645 i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
646 /* Display TV-picture, no virtual rows */
647 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 */
648
649 {
650 err = -EIO;
651 goto fail;
652 }
653
654 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
655 {
656 memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
657 memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
658 memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
659 t->vdau[pgbuf].expire = 0;
660 t->vdau[pgbuf].clrfound = true;
661 t->vdau[pgbuf].stopped = true;
662 t->is_searching[pgbuf] = false;
663 }
664 t->virtual_mode = false;
665 return 0;
666
667 fail:
668 video_exclusive_release(inode,file);
669 return err;
670 }
671
672
673
674 static int saa5249_release(struct inode *inode, struct file *file)
675 {
676 struct video_device *vd = video_devdata(file);
677 struct saa5249_device *t=vd->priv;
678 i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
679 i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
680 video_exclusive_release(inode,file);
681 return 0;
682 }
683
684 static int __init init_saa_5249 (void)
685 {
686 printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
687 VTX_VER_MAJ, VTX_VER_MIN);
688 return i2c_add_driver(&i2c_driver_videotext);
689 }
690
691 static void __exit cleanup_saa_5249 (void)
692 {
693 i2c_del_driver(&i2c_driver_videotext);
694 }
695
696 module_init(init_saa_5249);
697 module_exit(cleanup_saa_5249);
698
699 static const struct file_operations saa_fops = {
700 .owner = THIS_MODULE,
701 .open = saa5249_open,
702 .release = saa5249_release,
703 .ioctl = saa5249_ioctl,
704 .compat_ioctl = v4l_compat_ioctl32,
705 .llseek = no_llseek,
706 };
707
708 static struct video_device saa_template =
709 {
710 .owner = THIS_MODULE,
711 .name = IF_NAME,
712 .type = VID_TYPE_TELETEXT, /*| VID_TYPE_TUNER ?? */
713 .fops = &saa_fops,
714 };
715
716 MODULE_LICENSE("GPL");
WRT350N Kernel Patches