blob: 8c99edbe184355899524c3e6adc9beb0239d551b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
51MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
52MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
53MODULE_LICENSE("GPL");
54
55struct 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
63static struct video_device saa_template; /* Declared near bottom */
64
65/* Addresses to scan */
66static unsigned short normal_i2c[] = { I2C_ADDRESS, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070067I2C_CLIENT_INSMOD;
68
69static struct i2c_client client_template;
70
71static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind)
72{
73 int pgbuf;
74 int err;
75 struct i2c_client *client;
76 struct video_device *vd;
77 struct saa5246a_device *t;
78
79 printk(KERN_INFO "saa5246a: teletext chip found.\n");
80 client=kmalloc(sizeof(*client), GFP_KERNEL);
81 if(client==NULL)
82 return -ENOMEM;
83 client_template.adapter = adap;
84 client_template.addr = addr;
85 memcpy(client, &client_template, sizeof(*client));
86 t = kmalloc(sizeof(*t), GFP_KERNEL);
87 if(t==NULL)
88 {
89 kfree(client);
90 return -ENOMEM;
91 }
92 memset(t, 0, sizeof(*t));
93 strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
94 init_MUTEX(&t->lock);
95
96 /*
97 * Now create a video4linux device
98 */
99
100 vd = video_device_alloc();
101 if(vd==NULL)
102 {
103 kfree(t);
104 kfree(client);
105 return -ENOMEM;
106 }
107 i2c_set_clientdata(client, vd);
108 memcpy(vd, &saa_template, sizeof(*vd));
109
110 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
111 {
112 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
113 t->is_searching[pgbuf] = FALSE;
114 }
115 vd->priv=t;
116
117
118 /*
119 * Register it
120 */
121
122 if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
123 {
124 kfree(t);
125 kfree(client);
126 video_device_release(vd);
127 return err;
128 }
129 t->client = client;
130 i2c_attach_client(client);
131 return 0;
132}
133
134/*
135 * We do most of the hard work when we become a device on the i2c.
136 */
137static int saa5246a_probe(struct i2c_adapter *adap)
138{
139 if (adap->class & I2C_CLASS_TV_ANALOG)
140 return i2c_probe(adap, &addr_data, saa5246a_attach);
141 return 0;
142}
143
144static int saa5246a_detach(struct i2c_client *client)
145{
146 struct video_device *vd = i2c_get_clientdata(client);
147 i2c_detach_client(client);
148 video_unregister_device(vd);
149 kfree(vd->priv);
150 kfree(client);
151 return 0;
152}
153
154static int saa5246a_command(struct i2c_client *device, unsigned int cmd,
155 void *arg)
156{
157 return -EINVAL;
158}
159
160/*
161 * I2C interfaces
162 */
163
164static struct i2c_driver i2c_driver_videotext =
165{
Laurent Riffard604f28e2005-11-26 20:43:39 +0100166 .driver = {
167 .owner = THIS_MODULE,
168 .name = IF_NAME, /* name */
169 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 .attach_adapter = saa5246a_probe,
172 .detach_client = saa5246a_detach,
173 .command = saa5246a_command
174};
175
176static struct i2c_client client_template = {
177 .driver = &i2c_driver_videotext,
178 .name = "(unset)",
179};
180
181static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
182{
183 char buf[64];
184
185 buf[0] = reg;
186 memcpy(buf+1, data, count);
187
188 if(i2c_master_send(t->client, buf, count+1)==count+1)
189 return 0;
190 return -1;
191}
192
193static int i2c_senddata(struct saa5246a_device *t, ...)
194{
195 unsigned char buf[64];
196 int v;
197 int ct=0;
198 va_list argp;
199 va_start(argp,t);
200
201 while((v=va_arg(argp,int))!=-1)
202 buf[ct++]=v;
203 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
204}
205
206/* Get count number of bytes from I²C-device at address adr, store them in buf.
207 * Start & stop handshaking is done by this routine, ack will be sent after the
208 * last byte to inhibit further sending of data. If uaccess is TRUE, data is
209 * written to user-space with put_user. Returns -1 if I²C-device didn't send
210 * acknowledge, 0 otherwise
211 */
212static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf)
213{
214 if(i2c_master_recv(t->client, buf, count)!=count)
215 return -1;
216 return 0;
217}
218
219/* When a page is found then the not FOUND bit in one of the status registers
220 * of the SAA5264A chip is cleared. Unfortunately this bit is not set
221 * automatically when a new page is requested. Instead this function must be
222 * called after a page has been requested.
223 *
224 * Return value: 0 if successful
225 */
226static int saa5246a_clear_found_bit(struct saa5246a_device *t,
227 unsigned char dau_no)
228{
229 unsigned char row_25_column_8;
230
231 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
232
233 dau_no |
234 R8_DO_NOT_CLEAR_MEMORY,
235
236 R9_CURSER_ROW_25,
237
238 R10_CURSER_COLUMN_8,
239
240 COMMAND_END) ||
241 i2c_getdata(t, 1, &row_25_column_8))
242 {
243 return -EIO;
244 }
245 row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND;
246 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
247
248 dau_no |
249 R8_DO_NOT_CLEAR_MEMORY,
250
251 R9_CURSER_ROW_25,
252
253 R10_CURSER_COLUMN_8,
254
255 row_25_column_8,
256
257 COMMAND_END))
258 {
259 return -EIO;
260 }
261
262 return 0;
263}
264
265/* Requests one videotext page as described in req. The fields of req are
266 * checked and an error is returned if something is invalid.
267 *
268 * Return value: 0 if successful
269 */
270static int saa5246a_request_page(struct saa5246a_device *t,
271 vtx_pagereq_t *req)
272{
273 if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX)
274 return -EINVAL;
275 if (req->pagemask & PGMASK_PAGE)
276 if (req->page < 0 || req->page > PAGE_MAX)
277 return -EINVAL;
278 if (req->pagemask & PGMASK_HOUR)
279 if (req->hour < 0 || req->hour > HOUR_MAX)
280 return -EINVAL;
281 if (req->pagemask & PGMASK_MINUTE)
282 if (req->minute < 0 || req->minute > MINUTE_MAX)
283 return -EINVAL;
284 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
285 return -EINVAL;
286
287 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
288
289 R2_IN_R3_SELECT_PAGE_HUNDREDS |
290 req->pgbuf << 4 |
291 R2_BANK_0 |
292 R2_HAMMING_CHECK_OFF,
293
294 HUNDREDS_OF_PAGE(req->page) |
295 R3_HOLD_PAGE |
296 (req->pagemask & PG_HUND ?
297 R3_PAGE_HUNDREDS_DO_CARE :
298 R3_PAGE_HUNDREDS_DO_NOT_CARE),
299
300 TENS_OF_PAGE(req->page) |
301 (req->pagemask & PG_TEN ?
302 R3_PAGE_TENS_DO_CARE :
303 R3_PAGE_TENS_DO_NOT_CARE),
304
305 UNITS_OF_PAGE(req->page) |
306 (req->pagemask & PG_UNIT ?
307 R3_PAGE_UNITS_DO_CARE :
308 R3_PAGE_UNITS_DO_NOT_CARE),
309
310 TENS_OF_HOUR(req->hour) |
311 (req->pagemask & HR_TEN ?
312 R3_HOURS_TENS_DO_CARE :
313 R3_HOURS_TENS_DO_NOT_CARE),
314
315 UNITS_OF_HOUR(req->hour) |
316 (req->pagemask & HR_UNIT ?
317 R3_HOURS_UNITS_DO_CARE :
318 R3_HOURS_UNITS_DO_NOT_CARE),
319
320 TENS_OF_MINUTE(req->minute) |
321 (req->pagemask & MIN_TEN ?
322 R3_MINUTES_TENS_DO_CARE :
323 R3_MINUTES_TENS_DO_NOT_CARE),
324
325 UNITS_OF_MINUTE(req->minute) |
326 (req->pagemask & MIN_UNIT ?
327 R3_MINUTES_UNITS_DO_CARE :
328 R3_MINUTES_UNITS_DO_NOT_CARE),
329
330 COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2,
331
332 R2_IN_R3_SELECT_PAGE_HUNDREDS |
333 req->pgbuf << 4 |
334 R2_BANK_0 |
335 R2_HAMMING_CHECK_OFF,
336
337 HUNDREDS_OF_PAGE(req->page) |
338 R3_UPDATE_PAGE |
339 (req->pagemask & PG_HUND ?
340 R3_PAGE_HUNDREDS_DO_CARE :
341 R3_PAGE_HUNDREDS_DO_NOT_CARE),
342
343 COMMAND_END))
344 {
345 return -EIO;
346 }
347
348 t->is_searching[req->pgbuf] = TRUE;
349 return 0;
350}
351
352/* This routine decodes the page number from the infobits contained in line 25.
353 *
354 * Parameters:
355 * infobits: must be bits 0 to 9 of column 25
356 *
357 * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123
358 */
359static inline int saa5246a_extract_pagenum_from_infobits(
360 unsigned char infobits[10])
361{
362 int page_hundreds, page_tens, page_units;
363
364 page_units = infobits[0] & ROW25_COLUMN0_PAGE_UNITS;
365 page_tens = infobits[1] & ROW25_COLUMN1_PAGE_TENS;
366 page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS;
367
368 /* page 0x.. means page 8.. */
369 if (page_hundreds == 0)
370 page_hundreds = 8;
371
372 return((page_hundreds << 8) | (page_tens << 4) | page_units);
373}
374
375/* Decodes the hour from the infobits contained in line 25.
376 *
377 * Parameters:
378 * infobits: must be bits 0 to 9 of column 25
379 *
380 * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12
381 */
382static inline int saa5246a_extract_hour_from_infobits(
383 unsigned char infobits[10])
384{
385 int hour_tens, hour_units;
386
387 hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS;
388 hour_tens = infobits[5] & ROW25_COLUMN5_HOUR_TENS;
389
390 return((hour_tens << 4) | hour_units);
391}
392
393/* Decodes the minutes from the infobits contained in line 25.
394 *
395 * Parameters:
396 * infobits: must be bits 0 to 9 of column 25
397 *
398 * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10
399 */
400static inline int saa5246a_extract_minutes_from_infobits(
401 unsigned char infobits[10])
402{
403 int minutes_tens, minutes_units;
404
405 minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS;
406 minutes_tens = infobits[3] & ROW25_COLUMN3_MINUTES_TENS;
407
408 return((minutes_tens << 4) | minutes_units);
409}
410
411/* Reads the status bits contained in the first 10 columns of the first line
412 * and extracts the information into info.
413 *
414 * Return value: 0 if successful
415 */
416static inline int saa5246a_get_status(struct saa5246a_device *t,
417 vtx_pageinfo_t *info, unsigned char dau_no)
418{
419 unsigned char infobits[10];
420 int column;
421
422 if (dau_no >= NUM_DAUS)
423 return -EINVAL;
424
425 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
426
427 dau_no |
428 R8_DO_NOT_CLEAR_MEMORY,
429
430 R9_CURSER_ROW_25,
431
432 R10_CURSER_COLUMN_0,
433
434 COMMAND_END) ||
435 i2c_getdata(t, 10, infobits))
436 {
437 return -EIO;
438 }
439
440 info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits);
441 info->hour = saa5246a_extract_hour_from_infobits(infobits);
442 info->minute = saa5246a_extract_minutes_from_infobits(infobits);
443 info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1);
444 info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE);
445 info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE);
446 info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE);
447 info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER);
448 info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE);
449 info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE);
450 info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY);
451 info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE);
452 info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND);
453 info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR);
454 info->hamming = 0;
455 for (column = 0; column <= 7; column++) {
456 if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) {
457 info->hamming = 1;
458 break;
459 }
460 }
461 if (!info->hamming && !info->notfound)
462 t->is_searching[dau_no] = FALSE;
463 return 0;
464}
465
466/* Reads 1 videotext page buffer of the SAA5246A.
467 *
468 * req is used both as input and as output. It contains information which part
469 * must be read. The videotext page is copied into req->buffer.
470 *
471 * Return value: 0 if successful
472 */
473static inline int saa5246a_get_page(struct saa5246a_device *t,
474 vtx_pagereq_t *req)
475{
476 int start, end, size;
477 char *buf;
478 int err;
479
480 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
481 req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
482 return -EINVAL;
483
484 buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL);
485 if (!buf)
486 return -ENOMEM;
487
488 /* Read "normal" part of page */
489 err = -EIO;
490
491 end = min(req->end, VTX_PAGESIZE - 1);
492 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
493 req->pgbuf | R8_DO_NOT_CLEAR_MEMORY,
494 ROW(req->start), COLUMN(req->start), COMMAND_END))
495 goto out;
496 if (i2c_getdata(t, end - req->start + 1, buf))
497 goto out;
498 err = -EFAULT;
499 if (copy_to_user(req->buffer, buf, end - req->start + 1))
500 goto out;
501
502 /* Always get the time from buffer 4, since this stupid SAA5246A only
503 * updates the currently displayed buffer...
504 */
505 if (REQ_CONTAINS_TIME(req)) {
506 start = max(req->start, POS_TIME_START);
507 end = min(req->end, POS_TIME_END);
508 size = end - start + 1;
509 err = -EINVAL;
510 if (size < 0)
511 goto out;
512 err = -EIO;
513 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
514 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
515 R9_CURSER_ROW_0, start, COMMAND_END))
516 goto out;
517 if (i2c_getdata(t, size, buf))
518 goto out;
519 err = -EFAULT;
520 if (copy_to_user(req->buffer + start - req->start, buf, size))
521 goto out;
522 }
523 /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */
524 if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) {
525 start = max(req->start, POS_HEADER_START);
526 end = min(req->end, POS_HEADER_END);
527 size = end - start + 1;
528 err = -EINVAL;
529 if (size < 0)
530 goto out;
531 err = -EIO;
532 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
533 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
534 R9_CURSER_ROW_0, start, COMMAND_END))
535 goto out;
536 if (i2c_getdata(t, end - start + 1, buf))
537 goto out;
538 err = -EFAULT;
539 if (copy_to_user(req->buffer + start - req->start, buf, size))
540 goto out;
541 }
542 err = 0;
543out:
544 kfree(buf);
545 return err;
546}
547
548/* Stops the acquisition circuit given in dau_no. The page buffer associated
549 * with this acquisition circuit will no more be updated. The other daus are
550 * not affected.
551 *
552 * Return value: 0 if successful
553 */
554static inline int saa5246a_stop_dau(struct saa5246a_device *t,
555 unsigned char dau_no)
556{
557 if (dau_no >= NUM_DAUS)
558 return -EINVAL;
559 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
560
561 R2_IN_R3_SELECT_PAGE_HUNDREDS |
562 dau_no << 4 |
563 R2_BANK_0 |
564 R2_HAMMING_CHECK_OFF,
565
566 R3_PAGE_HUNDREDS_0 |
567 R3_HOLD_PAGE |
568 R3_PAGE_HUNDREDS_DO_NOT_CARE,
569
570 COMMAND_END))
571 {
572 return -EIO;
573 }
574 t->is_searching[dau_no] = FALSE;
575 return 0;
576}
577
578/* Handles ioctls defined in videotext.h
579 *
580 * Returns 0 if successful
581 */
582static int do_saa5246a_ioctl(struct inode *inode, struct file *file,
583 unsigned int cmd, void *arg)
584{
585 struct video_device *vd = video_devdata(file);
586 struct saa5246a_device *t=vd->priv;
587 switch(cmd)
588 {
589 case VTXIOCGETINFO:
590 {
591 vtx_info_t *info = arg;
592
593 info->version_major = MAJOR_VERSION;
594 info->version_minor = MINOR_VERSION;
595 info->numpages = NUM_DAUS;
596 return 0;
597 }
598
599 case VTXIOCCLRPAGE:
600 {
601 vtx_pagereq_t *req = arg;
602
603 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
604 return -EINVAL;
605 memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0]));
606 return 0;
607 }
608
609 case VTXIOCCLRFOUND:
610 {
611 vtx_pagereq_t *req = arg;
612
613 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
614 return -EINVAL;
615 return(saa5246a_clear_found_bit(t, req->pgbuf));
616 }
617
618 case VTXIOCPAGEREQ:
619 {
620 vtx_pagereq_t *req = arg;
621
622 return(saa5246a_request_page(t, req));
623 }
624
625 case VTXIOCGETSTAT:
626 {
627 vtx_pagereq_t *req = arg;
628 vtx_pageinfo_t info;
629 int rval;
630
631 if ((rval = saa5246a_get_status(t, &info, req->pgbuf)))
632 return rval;
633 if(copy_to_user(req->buffer, &info,
634 sizeof(vtx_pageinfo_t)))
635 return -EFAULT;
636 return 0;
637 }
638
639 case VTXIOCGETPAGE:
640 {
641 vtx_pagereq_t *req = arg;
642
643 return(saa5246a_get_page(t, req));
644 }
645
646 case VTXIOCSTOPDAU:
647 {
648 vtx_pagereq_t *req = arg;
649
650 return(saa5246a_stop_dau(t, req->pgbuf));
651 }
652
653 case VTXIOCPUTPAGE:
654 case VTXIOCSETDISP:
655 case VTXIOCPUTSTAT:
656 return 0;
657
658 case VTXIOCCLRCACHE:
659 {
660 return 0;
661 }
662
663 case VTXIOCSETVIRT:
664 {
665 /* I do not know what "virtual mode" means */
666 return 0;
667 }
668 }
669 return -EINVAL;
670}
671
672/*
673 * Translates old vtx IOCTLs to new ones
674 *
675 * This keeps new kernel versions compatible with old userspace programs.
676 */
677static inline unsigned int vtx_fix_command(unsigned int cmd)
678{
679 switch (cmd) {
680 case VTXIOCGETINFO_OLD:
681 cmd = VTXIOCGETINFO;
682 break;
683 case VTXIOCCLRPAGE_OLD:
684 cmd = VTXIOCCLRPAGE;
685 break;
686 case VTXIOCCLRFOUND_OLD:
687 cmd = VTXIOCCLRFOUND;
688 break;
689 case VTXIOCPAGEREQ_OLD:
690 cmd = VTXIOCPAGEREQ;
691 break;
692 case VTXIOCGETSTAT_OLD:
693 cmd = VTXIOCGETSTAT;
694 break;
695 case VTXIOCGETPAGE_OLD:
696 cmd = VTXIOCGETPAGE;
697 break;
698 case VTXIOCSTOPDAU_OLD:
699 cmd = VTXIOCSTOPDAU;
700 break;
701 case VTXIOCPUTPAGE_OLD:
702 cmd = VTXIOCPUTPAGE;
703 break;
704 case VTXIOCSETDISP_OLD:
705 cmd = VTXIOCSETDISP;
706 break;
707 case VTXIOCPUTSTAT_OLD:
708 cmd = VTXIOCPUTSTAT;
709 break;
710 case VTXIOCCLRCACHE_OLD:
711 cmd = VTXIOCCLRCACHE;
712 break;
713 case VTXIOCSETVIRT_OLD:
714 cmd = VTXIOCSETVIRT;
715 break;
716 }
717 return cmd;
718}
719
720/*
721 * Handle the locking
722 */
723static int saa5246a_ioctl(struct inode *inode, struct file *file,
724 unsigned int cmd, unsigned long arg)
725{
726 struct video_device *vd = video_devdata(file);
727 struct saa5246a_device *t = vd->priv;
728 int err;
729
730 cmd = vtx_fix_command(cmd);
731 down(&t->lock);
732 err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
733 up(&t->lock);
734 return err;
735}
736
737static int saa5246a_open(struct inode *inode, struct file *file)
738{
739 struct video_device *vd = video_devdata(file);
740 struct saa5246a_device *t = vd->priv;
741 int err;
742
743 err = video_exclusive_open(inode,file);
744 if (err < 0)
745 return err;
746
747 if (t->client==NULL) {
748 err = -ENODEV;
749 goto fail;
750 }
751
752 if (i2c_senddata(t, SAA5246A_REGISTER_R0,
753
754 R0_SELECT_R11 |
755 R0_PLL_TIME_CONSTANT_LONG |
756 R0_ENABLE_nODD_EVEN_OUTPUT |
757 R0_ENABLE_HDR_POLL |
758 R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED |
759 R0_NO_FREE_RUN_PLL |
760 R0_NO_AUTOMATIC_FASTEXT_PROMPT,
761
762 R1_NON_INTERLACED_312_312_LINES |
763 R1_DEW |
764 R1_EXTENDED_PACKET_DISABLE |
765 R1_DAUS_ALL_ON |
766 R1_8_BITS_NO_PARITY |
767 R1_VCS_TO_SCS,
768
769 COMMAND_END) ||
770 i2c_senddata(t, SAA5246A_REGISTER_R4,
771
772 /* We do not care much for the TV display but nevertheless we
773 * need the currently displayed page later because only on that
774 * page the time is updated. */
775 R4_DISPLAY_PAGE_4,
776
777 COMMAND_END))
778 {
779 err = -EIO;
780 goto fail;
781 }
782
783 return 0;
784
785fail:
786 video_exclusive_release(inode,file);
787 return err;
788}
789
790static int saa5246a_release(struct inode *inode, struct file *file)
791{
792 struct video_device *vd = video_devdata(file);
793 struct saa5246a_device *t = vd->priv;
794
795 /* Stop all acquisition circuits. */
796 i2c_senddata(t, SAA5246A_REGISTER_R1,
797
798 R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES |
799 R1_DEW |
800 R1_EXTENDED_PACKET_DISABLE |
801 R1_DAUS_ALL_OFF |
802 R1_8_BITS_NO_PARITY |
803 R1_VCS_TO_SCS,
804
805 COMMAND_END);
806 video_exclusive_release(inode,file);
807 return 0;
808}
809
810static int __init init_saa_5246a (void)
811{
812 printk(KERN_INFO
813 "SAA5246A (or compatible) Teletext decoder driver version %d.%d\n",
814 MAJOR_VERSION, MINOR_VERSION);
815 return i2c_add_driver(&i2c_driver_videotext);
816}
817
818static void __exit cleanup_saa_5246a (void)
819{
820 i2c_del_driver(&i2c_driver_videotext);
821}
822
823module_init(init_saa_5246a);
824module_exit(cleanup_saa_5246a);
825
826static struct file_operations saa_fops = {
827 .owner = THIS_MODULE,
828 .open = saa5246a_open,
829 .release = saa5246a_release,
830 .ioctl = saa5246a_ioctl,
831 .llseek = no_llseek,
832};
833
834static struct video_device saa_template =
835{
836 .owner = THIS_MODULE,
837 .name = IF_NAME,
838 .type = VID_TYPE_TELETEXT,
839 .hardware = VID_HARDWARE_SAA5249,
840 .fops = &saa_fops,
841 .release = video_device_release,
842 .minor = -1,
843};