1 /*
2 * Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from
3 * Philips.
4 *
5 * Only capturing of Teletext pages is tested. The videotext chips also have a
6 * TV output but my hardware doesn't use it. For this reason this driver does
7 * not support changing any TV display settings.
8 *
9 * Copyright (C) 2004 Michael Geng <linux@MichaelGeng.de>
10 *
11 * Derived from
12 *
13 * saa5249 driver
14 * Copyright (C) 1998 Richard Guenther
15 * <richard.guenther@student.uni-tuebingen.de>
16 *
17 * with changes by
18 * Alan Cox <Alan.Cox@linux.org>
19 *
20 * and
21 *
22 * vtx.c
23 * Copyright (C) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de>
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
38 * USA.
39 */
40
41 #include <linux/module.h>
42 #include <linux/kernel.h>
43 #include <linux/sched.h>
44 #include <linux/mm.h>
45 #include <linux/init.h>
46 #include <linux/i2c.h>
47 #include <linux/videotext.h>
48 #include <linux/videodev.h>
49 #include "saa5246a.h"
50
51 MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
52 MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
53 MODULE_LICENSE("GPL");
54
55 struct saa5246a_device
56 {
57 u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
58 int is_searching[NUM_DAUS];
59 struct i2c_client *client;
60 struct semaphore lock;
61 };
62
63 static struct video_device saa_template; /* Declared near bottom */
64
65 /* Addresses to scan */
66 static unsigned short normal_i2c[] = { I2C_ADDRESS, I2C_CLIENT_END };
67 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
68 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
69 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
70 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
71 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
72 static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
73
74 static struct i2c_client_address_data addr_data = {
75 normal_i2c, normal_i2c_range,
76 probe, probe_range,
77 ignore, ignore_range,
78 force
79 };
80
81 static struct i2c_client client_template;
82
83 static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind)
84 {
85 int pgbuf;
86 int err;
87 struct i2c_client *client;
88 struct video_device *vd;
89 struct saa5246a_device *t;
90
91 printk(KERN_INFO "saa5246a: teletext chip found.\n");
92 client=kmalloc(sizeof(*client), GFP_KERNEL);
93 if(client==NULL)
94 return -ENOMEM;
95 client_template.adapter = adap;
96 client_template.addr = addr;
97 memcpy(client, &client_template, sizeof(*client));
98 t = kmalloc(sizeof(*t), GFP_KERNEL);
99 if(t==NULL)
100 {
101 kfree(client);
102 return -ENOMEM;
103 }
104 memset(t, 0, sizeof(*t));
105 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
106 init_MUTEX(&t->lock);
107
108 /*
109 * Now create a video4linux device
110 */
111
112 vd = video_device_alloc();
113 if(vd==NULL)
114 {
115 kfree(t);
116 kfree(client);
117 return -ENOMEM;
118 }
119 i2c_set_clientdata(client, vd);
120 memcpy(vd, &saa_template, sizeof(*vd));
121
122 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
123 {
124 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
125 t->is_searching[pgbuf] = FALSE;
126 }
127 vd->priv=t;
128
129
130 /*
131 * Register it
132 */
133
134 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
135 {
136 kfree(t);
137 kfree(client);
138 video_device_release(vd);
139 return err;
140 }
141 t->client = client;
142 i2c_attach_client(client);
143 return 0;
144 }
145
146 /*
147 * We do most of the hard work when we become a device on the i2c.
148 */
149 static int saa5246a_probe(struct i2c_adapter *adap)
150 {
151 if (adap->class & I2C_CLASS_TV_ANALOG)
152 return i2c_probe(adap, &addr_data, saa5246a_attach);
153 return 0;
154 }
155
156 static int saa5246a_detach(struct i2c_client *client)
157 {
158 struct video_device *vd = i2c_get_clientdata(client);
159 i2c_detach_client(client);
160 video_unregister_device(vd);
161 kfree(vd->priv);
162 kfree(client);
163 return 0;
164 }
165
166 static int saa5246a_command(struct i2c_client *device, unsigned int cmd,
167 void *arg)
168 {
169 return -EINVAL;
170 }
171
172 /*
173 * I2C interfaces
174 */
175
176 static struct i2c_driver i2c_driver_videotext =
177 {
178 .owner = THIS_MODULE,
179 .name = IF_NAME, /* name */
180 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
181 .flags = I2C_DF_NOTIFY,
182 .attach_adapter = saa5246a_probe,
183 .detach_client = saa5246a_detach,
184 .command = saa5246a_command
185 };
186
187 static struct i2c_client client_template = {
188 .id = -1,
189 .driver = &i2c_driver_videotext,
190 .name = "(unset)",
191 };
192
193 static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
194 {
195 char buf[64];
196
197 buf[0] = reg;
198 memcpy(buf+1, data, count);
199
200 if(i2c_master_send(t->client, buf, count+1)==count+1)
201 return 0;
202 return -1;
203 }
204
205 static int i2c_senddata(struct saa5246a_device *t, ...)
206 {
207 unsigned char buf[64];
208 int v;
209 int ct=0;
210 va_list argp;
211 va_start(argp,t);
212
213 while((v=va_arg(argp,int))!=-1)
214 buf[ct++]=v;
215 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
216 }
217
218 /* Get count number of bytes from I²C-device at address adr, store them in buf.
219 * Start & stop handshaking is done by this routine, ack will be sent after the
220 * last byte to inhibit further sending of data. If uaccess is TRUE, data is
221 * written to user-space with put_user. Returns -1 if I²C-device didn't send
222 * acknowledge, 0 otherwise
223 */
224 static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf)
225 {
226 if(i2c_master_recv(t->client, buf, count)!=count)
227 return -1;
228 return 0;
229 }
230
231 /* When a page is found then the not FOUND bit in one of the status registers
232 * of the SAA5264A chip is cleared. Unfortunately this bit is not set
233 * automatically when a new page is requested. Instead this function must be
234 * called after a page has been requested.
235 *
236 * Return value: 0 if successful
237 */
238 static int saa5246a_clear_found_bit(struct saa5246a_device *t,
239 unsigned char dau_no)
240 {
241 unsigned char row_25_column_8;
242
243 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
244
245 dau_no |
246 R8_DO_NOT_CLEAR_MEMORY,
247
248 R9_CURSER_ROW_25,
249
250 R10_CURSER_COLUMN_8,
251
252 COMMAND_END) ||
253 i2c_getdata(t, 1, &row_25_column_8))
254 {
255 return -EIO;
256 }
257 row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND;
258 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
259
260 dau_no |
261 R8_DO_NOT_CLEAR_MEMORY,
262
263 R9_CURSER_ROW_25,
264
265 R10_CURSER_COLUMN_8,
266
267 row_25_column_8,
268
269 COMMAND_END))
270 {
271 return -EIO;
272 }
273
274 return 0;
275 }
276
277 /* Requests one videotext page as described in req. The fields of req are
278 * checked and an error is returned if something is invalid.
279 *
280 * Return value: 0 if successful
281 */
282 static int saa5246a_request_page(struct saa5246a_device *t,
283 vtx_pagereq_t *req)
284 {
285 if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX)
286 return -EINVAL;
287 if (req->pagemask & PGMASK_PAGE)
288 if (req->page < 0 || req->page > PAGE_MAX)
289 return -EINVAL;
290 if (req->pagemask & PGMASK_HOUR)
291 if (req->hour < 0 || req->hour > HOUR_MAX)
292 return -EINVAL;
293 if (req->pagemask & PGMASK_MINUTE)
294 if (req->minute < 0 || req->minute > MINUTE_MAX)
295 return -EINVAL;
296 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
297 return -EINVAL;
298
299 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
300
301 R2_IN_R3_SELECT_PAGE_HUNDREDS |
302 req->pgbuf << 4 |
303 R2_BANK_0 |
304 R2_HAMMING_CHECK_OFF,
305
306 HUNDREDS_OF_PAGE(req->page) |
307 R3_HOLD_PAGE |
308 (req->pagemask & PG_HUND ?
309 R3_PAGE_HUNDREDS_DO_CARE :
310 R3_PAGE_HUNDREDS_DO_NOT_CARE),
311
312 TENS_OF_PAGE(req->page) |
313 (req->pagemask & PG_TEN ?
314 R3_PAGE_TENS_DO_CARE :
315 R3_PAGE_TENS_DO_NOT_CARE),
316
317 UNITS_OF_PAGE(req->page) |
318 (req->pagemask & PG_UNIT ?
319 R3_PAGE_UNITS_DO_CARE :
320 R3_PAGE_UNITS_DO_NOT_CARE),
321
322 TENS_OF_HOUR(req->hour) |
323 (req->pagemask & HR_TEN ?
324 R3_HOURS_TENS_DO_CARE :
325 R3_HOURS_TENS_DO_NOT_CARE),
326
327 UNITS_OF_HOUR(req->hour) |
328 (req->pagemask & HR_UNIT ?
329 R3_HOURS_UNITS_DO_CARE :
330 R3_HOURS_UNITS_DO_NOT_CARE),
331
332 TENS_OF_MINUTE(req->minute) |
333 (req->pagemask & MIN_TEN ?
334 R3_MINUTES_TENS_DO_CARE :
335 R3_MINUTES_TENS_DO_NOT_CARE),
336
337 UNITS_OF_MINUTE(req->minute) |
338 (req->pagemask & MIN_UNIT ?
339 R3_MINUTES_UNITS_DO_CARE :
340 R3_MINUTES_UNITS_DO_NOT_CARE),
341
342 COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2,
343
344 R2_IN_R3_SELECT_PAGE_HUNDREDS |
345 req->pgbuf << 4 |
346 R2_BANK_0 |
347 R2_HAMMING_CHECK_OFF,
348
349 HUNDREDS_OF_PAGE(req->page) |
350 R3_UPDATE_PAGE |
351 (req->pagemask & PG_HUND ?
352 R3_PAGE_HUNDREDS_DO_CARE :
353 R3_PAGE_HUNDREDS_DO_NOT_CARE),
354
355 COMMAND_END))
356 {
357 return -EIO;
358 }
359
360 t->is_searching[req->pgbuf] = TRUE;
361 return 0;
362 }
363
364 /* This routine decodes the page number from the infobits contained in line 25.
365 *
366 * Parameters:
367 * infobits: must be bits 0 to 9 of column 25
368 *
369 * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123
370 */
371 static inline int saa5246a_extract_pagenum_from_infobits(
372 unsigned char infobits[10])
373 {
374 int page_hundreds, page_tens, page_units;
375
376 page_units = infobits[0] & ROW25_COLUMN0_PAGE_UNITS;
377 page_tens = infobits[1] & ROW25_COLUMN1_PAGE_TENS;
378 page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS;
379
380 /* page 0x.. means page 8.. */
381 if (page_hundreds == 0)
382 page_hundreds = 8;
383
384 return((page_hundreds << 8) | (page_tens << 4) | page_units);
385 }
386
387 /* Decodes the hour from the infobits contained in line 25.
388 *
389 * Parameters:
390 * infobits: must be bits 0 to 9 of column 25
391 *
392 * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12
393 */
394 static inline int saa5246a_extract_hour_from_infobits(
395 unsigned char infobits[10])
396 {
397 int hour_tens, hour_units;
398
399 hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS;
400 hour_tens = infobits[5] & ROW25_COLUMN5_HOUR_TENS;
401
402 return((hour_tens << 4) | hour_units);
403 }
404
405 /* Decodes the minutes from the infobits contained in line 25.
406 *
407 * Parameters:
408 * infobits: must be bits 0 to 9 of column 25
409 *
410 * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10
411 */
412 static inline int saa5246a_extract_minutes_from_infobits(
413 unsigned char infobits[10])
414 {
415 int minutes_tens, minutes_units;
416
417 minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS;
418 minutes_tens = infobits[3] & ROW25_COLUMN3_MINUTES_TENS;
419
420 return((minutes_tens << 4) | minutes_units);
421 }
422
423 /* Reads the status bits contained in the first 10 columns of the first line
424 * and extracts the information into info.
425 *
426 * Return value: 0 if successful
427 */
428 static inline int saa5246a_get_status(struct saa5246a_device *t,
429 vtx_pageinfo_t *info, unsigned char dau_no)
430 {
431 unsigned char infobits[10];
432 int column;
433
434 if (dau_no >= NUM_DAUS)
435 return -EINVAL;
436
437 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
438
439 dau_no |
440 R8_DO_NOT_CLEAR_MEMORY,
441
442 R9_CURSER_ROW_25,
443
444 R10_CURSER_COLUMN_0,
445
446 COMMAND_END) ||
447 i2c_getdata(t, 10, infobits))
448 {
449 return -EIO;
450 }
451
452 info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits);
453 info->hour = saa5246a_extract_hour_from_infobits(infobits);
454 info->minute = saa5246a_extract_minutes_from_infobits(infobits);
455 info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1);
456 info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE);
457 info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE);
458 info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE);
459 info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER);
460 info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE);
461 info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE);
462 info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY);
463 info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE);
464 info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND);
465 info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR);
466 info->hamming = 0;
467 for (column = 0; column <= 7; column++) {
468 if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) {
469 info->hamming = 1;
470 break;
471 }
472 }
473 if (!info->hamming && !info->notfound)
474 t->is_searching[dau_no] = FALSE;
475 return 0;
476 }
477
478 /* Reads 1 videotext page buffer of the SAA5246A.
479 *
480 * req is used both as input and as output. It contains information which part
481 * must be read. The videotext page is copied into req->buffer.
482 *
483 * Return value: 0 if successful
484 */
485 static inline int saa5246a_get_page(struct saa5246a_device *t,
486 vtx_pagereq_t *req)
487 {
488 int start, end, size;
489 char *buf;
490 int err;
491
492 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
493 req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
494 return -EINVAL;
495
496 buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL);
497 if (!buf)
498 return -ENOMEM;
499
500 /* Read "normal" part of page */
501 err = -EIO;
502
503 end = min(req->end, VTX_PAGESIZE - 1);
504 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
505 req->pgbuf | R8_DO_NOT_CLEAR_MEMORY,
506 ROW(req->start), COLUMN(req->start), COMMAND_END))
507 goto out;
508 if (i2c_getdata(t, end - req->start + 1, buf))
509 goto out;
510 err = -EFAULT;
511 if (copy_to_user(req->buffer, buf, end - req->start + 1))
512 goto out;
513
514 /* Always get the time from buffer 4, since this stupid SAA5246A only
515 * updates the currently displayed buffer...
516 */
517 if (REQ_CONTAINS_TIME(req)) {
518 start = max(req->start, POS_TIME_START);
519 end = min(req->end, POS_TIME_END);
520 size = end - start + 1;
521 err = -EINVAL;
522 if (size < 0)
523 goto out;
524 err = -EIO;
525 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
526 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
527 R9_CURSER_ROW_0, start, COMMAND_END))
528 goto out;
529 if (i2c_getdata(t, size, buf))
530 goto out;
531 err = -EFAULT;
532 if (copy_to_user(req->buffer + start - req->start, buf, size))
533 goto out;
534 }
535 /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */
536 if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) {
537 start = max(req->start, POS_HEADER_START);
538 end = min(req->end, POS_HEADER_END);
539 size = end - start + 1;
540 err = -EINVAL;
541 if (size < 0)
542 goto out;
543 err = -EIO;
544 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
545 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
546 R9_CURSER_ROW_0, start, COMMAND_END))
547 goto out;
548 if (i2c_getdata(t, end - start + 1, buf))
549 goto out;
550 err = -EFAULT;
551 if (copy_to_user(req->buffer + start - req->start, buf, size))
552 goto out;
553 }
554 err = 0;
555 out:
556 kfree(buf);
557 return err;
558 }
559
560 /* Stops the acquisition circuit given in dau_no. The page buffer associated
561 * with this acquisition circuit will no more be updated. The other daus are
562 * not affected.
563 *
564 * Return value: 0 if successful
565 */
566 static inline int saa5246a_stop_dau(struct saa5246a_device *t,
567 unsigned char dau_no)
568 {
569 if (dau_no >= NUM_DAUS)
570 return -EINVAL;
571 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
572
573 R2_IN_R3_SELECT_PAGE_HUNDREDS |
574 dau_no << 4 |
575 R2_BANK_0 |
576 R2_HAMMING_CHECK_OFF,
577
578 R3_PAGE_HUNDREDS_0 |
579 R3_HOLD_PAGE |
580 R3_PAGE_HUNDREDS_DO_NOT_CARE,
581
582 COMMAND_END))
583 {
584 return -EIO;
585 }
586 t->is_searching[dau_no] = FALSE;
587 return 0;
588 }
589
590 /* Handles ioctls defined in videotext.h
591 *
592 * Returns 0 if successful
593 */
594 static int do_saa5246a_ioctl(struct inode *inode, struct file *file,
595 unsigned int cmd, void *arg)
596 {
597 struct video_device *vd = video_devdata(file);
598 struct saa5246a_device *t=vd->priv;
599 switch(cmd)
600 {
601 case VTXIOCGETINFO:
602 {
603 vtx_info_t *info = arg;
604
605 info->version_major = MAJOR_VERSION;
606 info->version_minor = MINOR_VERSION;
607 info->numpages = NUM_DAUS;
608 return 0;
609 }
610
611 case VTXIOCCLRPAGE:
612 {
613 vtx_pagereq_t *req = arg;
614
615 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
616 return -EINVAL;
617 memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0]));
618 return 0;
619 }
620
621 case VTXIOCCLRFOUND:
622 {
623 vtx_pagereq_t *req = arg;
624
625 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
626 return -EINVAL;
627 return(saa5246a_clear_found_bit(t, req->pgbuf));
628 }
629
630 case VTXIOCPAGEREQ:
631 {
632 vtx_pagereq_t *req = arg;
633
634 return(saa5246a_request_page(t, req));
635 }
636
637 case VTXIOCGETSTAT:
638 {
639 vtx_pagereq_t *req = arg;
640 vtx_pageinfo_t info;
641 int rval;
642
643 if ((rval = saa5246a_get_status(t, &info, req->pgbuf)))
644 return rval;
645 if(copy_to_user(req->buffer, &info,
646 sizeof(vtx_pageinfo_t)))
647 return -EFAULT;
648 return 0;
649 }
650
651 case VTXIOCGETPAGE:
652 {
653 vtx_pagereq_t *req = arg;
654
655 return(saa5246a_get_page(t, req));
656 }
657
658 case VTXIOCSTOPDAU:
659 {
660 vtx_pagereq_t *req = arg;
661
662 return(saa5246a_stop_dau(t, req->pgbuf));
663 }
664
665 case VTXIOCPUTPAGE:
666 case VTXIOCSETDISP:
667 case VTXIOCPUTSTAT:
668 return 0;
669
670 case VTXIOCCLRCACHE:
671 {
672 return 0;
673 }
674
675 case VTXIOCSETVIRT:
676 {
677 /* I do not know what "virtual mode" means */
678 return 0;
679 }
680 }
681 return -EINVAL;
682 }
683
684 /*
685 * Translates old vtx IOCTLs to new ones
686 *
687 * This keeps new kernel versions compatible with old userspace programs.
688 */
689 static inline unsigned int vtx_fix_command(unsigned int cmd)
690 {
691 switch (cmd) {
692 case VTXIOCGETINFO_OLD:
693 cmd = VTXIOCGETINFO;
694 break;
695 case VTXIOCCLRPAGE_OLD:
696 cmd = VTXIOCCLRPAGE;
697 break;
698 case VTXIOCCLRFOUND_OLD:
699 cmd = VTXIOCCLRFOUND;
700 break;
701 case VTXIOCPAGEREQ_OLD:
702 cmd = VTXIOCPAGEREQ;
703 break;
704 case VTXIOCGETSTAT_OLD:
705 cmd = VTXIOCGETSTAT;
706 break;
707 case VTXIOCGETPAGE_OLD:
708 cmd = VTXIOCGETPAGE;
709 break;
710 case VTXIOCSTOPDAU_OLD:
711 cmd = VTXIOCSTOPDAU;
712 break;
713 case VTXIOCPUTPAGE_OLD:
714 cmd = VTXIOCPUTPAGE;
715 break;
716 case VTXIOCSETDISP_OLD:
717 cmd = VTXIOCSETDISP;
718 break;
719 case VTXIOCPUTSTAT_OLD:
720 cmd = VTXIOCPUTSTAT;
721 break;
722 case VTXIOCCLRCACHE_OLD:
723 cmd = VTXIOCCLRCACHE;
724 break;
725 case VTXIOCSETVIRT_OLD:
726 cmd = VTXIOCSETVIRT;
727 break;
728 }
729 return cmd;
730 }
731
732 /*
733 * Handle the locking
734 */
735 static int saa5246a_ioctl(struct inode *inode, struct file *file,
736 unsigned int cmd, unsigned long arg)
737 {
738 struct video_device *vd = video_devdata(file);
739 struct saa5246a_device *t = vd->priv;
740 int err;
741
742 cmd = vtx_fix_command(cmd);
743 down(&t->lock);
744 err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
745 up(&t->lock);
746 return err;
747 }
748
749 static int saa5246a_open(struct inode *inode, struct file *file)
750 {
751 struct video_device *vd = video_devdata(file);
752 struct saa5246a_device *t = vd->priv;
753 int err;
754
755 err = video_exclusive_open(inode,file);
756 if (err < 0)
757 return err;
758
759 if (t->client==NULL) {
760 err = -ENODEV;
761 goto fail;
762 }
763
764 if (i2c_senddata(t, SAA5246A_REGISTER_R0,
765
766 R0_SELECT_R11 |
767 R0_PLL_TIME_CONSTANT_LONG |
768 R0_ENABLE_nODD_EVEN_OUTPUT |
769 R0_ENABLE_HDR_POLL |
770 R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED |
771 R0_NO_FREE_RUN_PLL |
772 R0_NO_AUTOMATIC_FASTEXT_PROMPT,
773
774 R1_NON_INTERLACED_312_312_LINES |
775 R1_DEW |
776 R1_EXTENDED_PACKET_DISABLE |
777 R1_DAUS_ALL_ON |
778 R1_8_BITS_NO_PARITY |
779 R1_VCS_TO_SCS,
780
781 COMMAND_END) ||
782 i2c_senddata(t, SAA5246A_REGISTER_R4,
783
784 /* We do not care much for the TV display but nevertheless we
785 * need the currently displayed page later because only on that
786 * page the time is updated. */
787 R4_DISPLAY_PAGE_4,
788
789 COMMAND_END))
790 {
791 err = -EIO;
792 goto fail;
793 }
794
795 return 0;
796
797 fail:
798 video_exclusive_release(inode,file);
799 return err;
800 }
801
802 static int saa5246a_release(struct inode *inode, struct file *file)
803 {
804 struct video_device *vd = video_devdata(file);
805 struct saa5246a_device *t = vd->priv;
806
807 /* Stop all acquisition circuits. */
808 i2c_senddata(t, SAA5246A_REGISTER_R1,
809
810 R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES |
811 R1_DEW |
812 R1_EXTENDED_PACKET_DISABLE |
813 R1_DAUS_ALL_OFF |
814 R1_8_BITS_NO_PARITY |
815 R1_VCS_TO_SCS,
816
817 COMMAND_END);
818 video_exclusive_release(inode,file);
819 return 0;
820 }
821
822 static int __init init_saa_5246a (void)
823 {
824 printk(KERN_INFO
825 "SAA5246A (or compatible) Teletext decoder driver version %d.%d\n",
826 MAJOR_VERSION, MINOR_VERSION);
827 return i2c_add_driver(&i2c_driver_videotext);
828 }
829
830 static void __exit cleanup_saa_5246a (void)
831 {
832 i2c_del_driver(&i2c_driver_videotext);
833 }
834
835 module_init(init_saa_5246a);
836 module_exit(cleanup_saa_5246a);
837
838 static struct file_operations saa_fops = {
839 .owner = THIS_MODULE,
840 .open = saa5246a_open,
841 .release = saa5246a_release,
842 .ioctl = saa5246a_ioctl,
843 .llseek = no_llseek,
844 };
845
846 static struct video_device saa_template =
847 {
848 .owner = THIS_MODULE,
849 .name = IF_NAME,
850 .type = VID_TYPE_TELETEXT,
851 .hardware = VID_HARDWARE_SAA5249,
852 .fops = &saa_fops,
853 .release = video_device_release,
854 .minor = -1,
855 };
856
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