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Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / saa5246a.c
CommitLineData
1da177e4
LT		 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
d9b01449 18 * Alan Cox <alan@lxorguk.ukuu.org.uk>
1da177e4
LT		 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>
1da177e4
LT		 43#include <linux/mm.h>
44#include <linux/init.h>
45#include <linux/i2c.h>
d56dc612 46#include <linux/smp_lock.h>
71ef85c7
HV		 47#include <linux/mutex.h>
48#include <linux/videotext.h>
1da177e4 49#include <linux/videodev.h>
5e87efa3 50#include <media/v4l2-common.h>
35ea11ff 51#include <media/v4l2-ioctl.h>
71ef85c7 52#include <media/v4l2-i2c-drv-legacy.h>
1da177e4
LT		 53
54MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>");
55MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver");
56MODULE_LICENSE("GPL");
57
71ef85c7
HV		 58#define MAJOR_VERSION 1 /* driver major version number */
59#define MINOR_VERSION 8 /* driver minor version number */
60
61/* Number of DAUs = number of pages that can be searched at the same time. */
62#define NUM_DAUS 4
63
64#define NUM_ROWS_PER_PAGE 40
65
66/* first column is 0 (not 1) */
67#define POS_TIME_START 32
68#define POS_TIME_END 39
69
70#define POS_HEADER_START 7
71#define POS_HEADER_END 31
72
73/* Returns 'true' if the part of the videotext page described with req contains
74 (at least parts of) the time field */
75#define REQ_CONTAINS_TIME(p_req) \
76 ((p_req)->start <= POS_TIME_END && \
77 (p_req)->end >= POS_TIME_START)
78
79/* Returns 'true' if the part of the videotext page described with req contains
80 (at least parts of) the page header */
81#define REQ_CONTAINS_HEADER(p_req) \
82 ((p_req)->start <= POS_HEADER_END && \
83 (p_req)->end >= POS_HEADER_START)
84
85/*****************************************************************************/
86/* Mode register numbers of the SAA5246A */
87/*****************************************************************************/
88#define SAA5246A_REGISTER_R0 0
89#define SAA5246A_REGISTER_R1 1
90#define SAA5246A_REGISTER_R2 2
91#define SAA5246A_REGISTER_R3 3
92#define SAA5246A_REGISTER_R4 4
93#define SAA5246A_REGISTER_R5 5
94#define SAA5246A_REGISTER_R6 6
95#define SAA5246A_REGISTER_R7 7
96#define SAA5246A_REGISTER_R8 8
97#define SAA5246A_REGISTER_R9 9
98#define SAA5246A_REGISTER_R10 10
99#define SAA5246A_REGISTER_R11 11
100#define SAA5246A_REGISTER_R11B 11
101
102/* SAA5246A mode registers often autoincrement to the next register.
103 Therefore we use variable argument lists. The following macro indicates
104 the end of a command list. */
105#define COMMAND_END (-1)
106
107/*****************************************************************************/
108/* Contents of the mode registers of the SAA5246A */
109/*****************************************************************************/
110/* Register R0 (Advanced Control) */
111#define R0_SELECT_R11 0x00
112#define R0_SELECT_R11B 0x01
113
114#define R0_PLL_TIME_CONSTANT_LONG 0x00
115#define R0_PLL_TIME_CONSTANT_SHORT 0x02
116
117#define R0_ENABLE_nODD_EVEN_OUTPUT 0x00
118#define R0_DISABLE_nODD_EVEN_OUTPUT 0x04
119
120#define R0_ENABLE_HDR_POLL 0x00
121#define R0_DISABLE_HDR_POLL 0x10
122
123#define R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x00
124#define R0_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x20
125
126#define R0_NO_FREE_RUN_PLL 0x00
127#define R0_FREE_RUN_PLL 0x40
128
129#define R0_NO_AUTOMATIC_FASTEXT_PROMPT 0x00
130#define R0_AUTOMATIC_FASTEXT_PROMPT 0x80
131
132/* Register R1 (Mode) */
133#define R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES 0x00
134#define R1_NON_INTERLACED_312_313_LINES 0x01
135#define R1_NON_INTERLACED_312_312_LINES 0x02
136#define R1_FFB_LEADING_EDGE_IN_FIRST_BROAD_PULSE 0x03
137#define R1_FFB_LEADING_EDGE_IN_SECOND_BROAD_PULSE 0x07
138
139#define R1_DEW 0x00
140#define R1_FULL_FIELD 0x08
141
142#define R1_EXTENDED_PACKET_DISABLE 0x00
143#define R1_EXTENDED_PACKET_ENABLE 0x10
144
145#define R1_DAUS_ALL_ON 0x00
146#define R1_DAUS_ALL_OFF 0x20
147
148#define R1_7_BITS_PLUS_PARITY 0x00
149#define R1_8_BITS_NO_PARITY 0x40
150
151#define R1_VCS_TO_SCS 0x00
152#define R1_NO_VCS_TO_SCS 0x80
153
154/* Register R2 (Page request address) */
155#define R2_IN_R3_SELECT_PAGE_HUNDREDS 0x00
156#define R2_IN_R3_SELECT_PAGE_TENS 0x01
157#define R2_IN_R3_SELECT_PAGE_UNITS 0x02
158#define R2_IN_R3_SELECT_HOURS_TENS 0x03
159#define R2_IN_R3_SELECT_HOURS_UNITS 0x04
160#define R2_IN_R3_SELECT_MINUTES_TENS 0x05
161#define R2_IN_R3_SELECT_MINUTES_UNITS 0x06
162
163#define R2_DAU_0 0x00
164#define R2_DAU_1 0x10
165#define R2_DAU_2 0x20
166#define R2_DAU_3 0x30
167
168#define R2_BANK_0 0x00
169#define R2_BANK 1 0x40
170
171#define R2_HAMMING_CHECK_ON 0x80
172#define R2_HAMMING_CHECK_OFF 0x00
173
174/* Register R3 (Page request data) */
175#define R3_PAGE_HUNDREDS_0 0x00
176#define R3_PAGE_HUNDREDS_1 0x01
177#define R3_PAGE_HUNDREDS_2 0x02
178#define R3_PAGE_HUNDREDS_3 0x03
179#define R3_PAGE_HUNDREDS_4 0x04
180#define R3_PAGE_HUNDREDS_5 0x05
181#define R3_PAGE_HUNDREDS_6 0x06
182#define R3_PAGE_HUNDREDS_7 0x07
1da177e4 183
71ef85c7
HV		 184#define R3_HOLD_PAGE 0x00
185#define R3_UPDATE_PAGE 0x08
1da177e4 186
71ef85c7
HV		 187#define R3_PAGE_HUNDREDS_DO_NOT_CARE 0x00
188#define R3_PAGE_HUNDREDS_DO_CARE 0x10
f87086e3 189
71ef85c7
HV		 190#define R3_PAGE_TENS_DO_NOT_CARE 0x00
191#define R3_PAGE_TENS_DO_CARE 0x10
1da177e4 192
71ef85c7
HV		 193#define R3_PAGE_UNITS_DO_NOT_CARE 0x00
194#define R3_PAGE_UNITS_DO_CARE 0x10
1da177e4 195
71ef85c7
HV		 196#define R3_HOURS_TENS_DO_NOT_CARE 0x00
197#define R3_HOURS_TENS_DO_CARE 0x10
1da177e4 198
71ef85c7
HV		 199#define R3_HOURS_UNITS_DO_NOT_CARE 0x00
200#define R3_HOURS_UNITS_DO_CARE 0x10
1da177e4 201
71ef85c7
HV		 202#define R3_MINUTES_TENS_DO_NOT_CARE 0x00
203#define R3_MINUTES_TENS_DO_CARE 0x10
1da177e4 204
71ef85c7
HV		 205#define R3_MINUTES_UNITS_DO_NOT_CARE 0x00
206#define R3_MINUTES_UNITS_DO_CARE 0x10
1da177e4 207
71ef85c7
HV		 208/* Register R4 (Display chapter) */
209#define R4_DISPLAY_PAGE_0 0x00
210#define R4_DISPLAY_PAGE_1 0x01
211#define R4_DISPLAY_PAGE_2 0x02
212#define R4_DISPLAY_PAGE_3 0x03
213#define R4_DISPLAY_PAGE_4 0x04
214#define R4_DISPLAY_PAGE_5 0x05
215#define R4_DISPLAY_PAGE_6 0x06
216#define R4_DISPLAY_PAGE_7 0x07
1da177e4 217
71ef85c7
HV		 218/* Register R5 (Normal display control) */
219#define R5_PICTURE_INSIDE_BOXING_OFF 0x00
220#define R5_PICTURE_INSIDE_BOXING_ON 0x01
1da177e4 221
71ef85c7
HV		 222#define R5_PICTURE_OUTSIDE_BOXING_OFF 0x00
223#define R5_PICTURE_OUTSIDE_BOXING_ON 0x02
1da177e4 224
71ef85c7
HV		 225#define R5_TEXT_INSIDE_BOXING_OFF 0x00
226#define R5_TEXT_INSIDE_BOXING_ON 0x04
1da177e4 227
71ef85c7
HV		 228#define R5_TEXT_OUTSIDE_BOXING_OFF 0x00
229#define R5_TEXT_OUTSIDE_BOXING_ON 0x08
1da177e4 230
71ef85c7
HV		 231#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
232#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
c170ecf4 233
71ef85c7
HV		 234#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
235#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
1da177e4 236
71ef85c7
HV		 237#define R5_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
238#define R5_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
239
240#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
241#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
242
243/* Register R6 (Newsflash display) */
244#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_OFF 0x00
245#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_ON 0x01
246
247#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_OFF 0x00
248#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_ON 0x02
249
250#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_OFF 0x00
251#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_ON 0x04
252
253#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_OFF 0x00
254#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_ON 0x08
255
256#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
257#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
258
259#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
260#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
261
262#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
263#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
264
265#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
266#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
267
268/* Register R7 (Display mode) */
269#define R7_BOX_OFF_ROW_0 0x00
270#define R7_BOX_ON_ROW_0 0x01
271
272#define R7_BOX_OFF_ROW_1_TO_23 0x00
273#define R7_BOX_ON_ROW_1_TO_23 0x02
274
275#define R7_BOX_OFF_ROW_24 0x00
276#define R7_BOX_ON_ROW_24 0x04
277
278#define R7_SINGLE_HEIGHT 0x00
279#define R7_DOUBLE_HEIGHT 0x08
280
281#define R7_TOP_HALF 0x00
282#define R7_BOTTOM_HALF 0x10
283
284#define R7_REVEAL_OFF 0x00
285#define R7_REVEAL_ON 0x20
286
287#define R7_CURSER_OFF 0x00
288#define R7_CURSER_ON 0x40
289
290#define R7_STATUS_BOTTOM 0x00
291#define R7_STATUS_TOP 0x80
292
293/* Register R8 (Active chapter) */
294#define R8_ACTIVE_CHAPTER_0 0x00
295#define R8_ACTIVE_CHAPTER_1 0x01
296#define R8_ACTIVE_CHAPTER_2 0x02
297#define R8_ACTIVE_CHAPTER_3 0x03
298#define R8_ACTIVE_CHAPTER_4 0x04
299#define R8_ACTIVE_CHAPTER_5 0x05
300#define R8_ACTIVE_CHAPTER_6 0x06
301#define R8_ACTIVE_CHAPTER_7 0x07
1da177e4 302
71ef85c7
HV		 303#define R8_CLEAR_MEMORY 0x08
304#define R8_DO_NOT_CLEAR_MEMORY 0x00
305
306/* Register R9 (Curser row) */
307#define R9_CURSER_ROW_0 0x00
308#define R9_CURSER_ROW_1 0x01
309#define R9_CURSER_ROW_2 0x02
310#define R9_CURSER_ROW_25 0x19
311
312/* Register R10 (Curser column) */
313#define R10_CURSER_COLUMN_0 0x00
314#define R10_CURSER_COLUMN_6 0x06
315#define R10_CURSER_COLUMN_8 0x08
316
317/*****************************************************************************/
318/* Row 25 control data in column 0 to 9 */
319/*****************************************************************************/
320#define ROW25_COLUMN0_PAGE_UNITS 0x0F
321
322#define ROW25_COLUMN1_PAGE_TENS 0x0F
323
324#define ROW25_COLUMN2_MINUTES_UNITS 0x0F
325
326#define ROW25_COLUMN3_MINUTES_TENS 0x07
327#define ROW25_COLUMN3_DELETE_PAGE 0x08
328
329#define ROW25_COLUMN4_HOUR_UNITS 0x0F
330
331#define ROW25_COLUMN5_HOUR_TENS 0x03
332#define ROW25_COLUMN5_INSERT_HEADLINE 0x04
333#define ROW25_COLUMN5_INSERT_SUBTITLE 0x08
334
335#define ROW25_COLUMN6_SUPPRESS_HEADER 0x01
336#define ROW25_COLUMN6_UPDATE_PAGE 0x02
337#define ROW25_COLUMN6_INTERRUPTED_SEQUENCE 0x04
338#define ROW25_COLUMN6_SUPPRESS_DISPLAY 0x08
339
340#define ROW25_COLUMN7_SERIAL_MODE 0x01
341#define ROW25_COLUMN7_CHARACTER_SET 0x0E
342
343#define ROW25_COLUMN8_PAGE_HUNDREDS 0x07
344#define ROW25_COLUMN8_PAGE_NOT_FOUND 0x10
345
346#define ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR 0x20
347
348#define ROW25_COLUMN0_TO_7_HAMMING_ERROR 0x10
349
350/*****************************************************************************/
351/* Helper macros for extracting page, hour and minute digits */
352/*****************************************************************************/
353/* BYTE_POS 0 is at row 0, column 0,
354 BYTE_POS 1 is at row 0, column 1,
355 BYTE_POS 40 is at row 1, column 0, (with NUM_ROWS_PER_PAGE = 40)
356 BYTE_POS 41 is at row 1, column 1, (with NUM_ROWS_PER_PAGE = 40),
357 ... */
358#define ROW(BYTE_POS) (BYTE_POS / NUM_ROWS_PER_PAGE)
359#define COLUMN(BYTE_POS) (BYTE_POS % NUM_ROWS_PER_PAGE)
360
361/*****************************************************************************/
362/* Helper macros for extracting page, hour and minute digits */
363/*****************************************************************************/
364/* Macros for extracting hundreds, tens and units of a page number which
365 must be in the range 0 ... 0x799.
366 Note that page is coded in hexadecimal, i.e. 0x123 means page 123.
367 page 0x.. means page 8.. */
368#define HUNDREDS_OF_PAGE(page) (((page) / 0x100) & 0x7)
369#define TENS_OF_PAGE(page) (((page) / 0x10) & 0xF)
370#define UNITS_OF_PAGE(page) ((page) & 0xF)
371
372/* Macros for extracting tens and units of a hour information which
373 must be in the range 0 ... 0x24.
374 Note that hour is coded in hexadecimal, i.e. 0x12 means 12 hours */
375#define TENS_OF_HOUR(hour) ((hour) / 0x10)
376#define UNITS_OF_HOUR(hour) ((hour) & 0xF)
377
378/* Macros for extracting tens and units of a minute information which
379 must be in the range 0 ... 0x59.
380 Note that minute is coded in hexadecimal, i.e. 0x12 means 12 minutes */
381#define TENS_OF_MINUTE(minute) ((minute) / 0x10)
382#define UNITS_OF_MINUTE(minute) ((minute) & 0xF)
383
384#define HOUR_MAX 0x23
385#define MINUTE_MAX 0x59
386#define PAGE_MAX 0x8FF
387
388
389struct saa5246a_device
1da177e4 390{
71ef85c7
HV		 391 u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
392 int is_searching[NUM_DAUS];
393 struct i2c_client *client;
394 unsigned long in_use;
395 struct mutex lock;
1da177e4
LT		 396};
397
71ef85c7
HV		 398static struct video_device saa_template; /* Declared near bottom */
399
400/*
401 * I2C interfaces
402 */
1da177e4
LT		 403
404static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
405{
406 char buf[64];
407
408 buf[0] = reg;
409 memcpy(buf+1, data, count);
410
411 if(i2c_master_send(t->client, buf, count+1)==count+1)
412 return 0;
413 return -1;
414}
415
416static int i2c_senddata(struct saa5246a_device *t, ...)
417{
418 unsigned char buf[64];
419 int v;
b730a81c 420 int ct = 0;
1da177e4 421 va_list argp;
b730a81c 422 va_start(argp, t);
1da177e4 423
b730a81c
RK		 424 while ((v = va_arg(argp, int)) != -1)
425 buf[ct++] = v;
426
427 va_end(argp);
1da177e4
LT		 428 return i2c_sendbuf(t, buf[0], ct-1, buf+1);
429}
430
db955170 431/* Get count number of bytes from I²C-device at address adr, store them in buf.
1da177e4 432 * Start & stop handshaking is done by this routine, ack will be sent after the
e8be02a3 433 * last byte to inhibit further sending of data. If uaccess is 'true', data is
db955170 434 * written to user-space with put_user. Returns -1 if I²C-device didn't send
1da177e4
LT		 435 * acknowledge, 0 otherwise
436 */
437static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf)
438{
439 if(i2c_master_recv(t->client, buf, count)!=count)
440 return -1;
441 return 0;
442}
443
444/* When a page is found then the not FOUND bit in one of the status registers
445 * of the SAA5264A chip is cleared. Unfortunately this bit is not set
446 * automatically when a new page is requested. Instead this function must be
447 * called after a page has been requested.
448 *
449 * Return value: 0 if successful
450 */
451static int saa5246a_clear_found_bit(struct saa5246a_device *t,
452 unsigned char dau_no)
453{
454 unsigned char row_25_column_8;
455
456 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
457
458 dau_no |
459 R8_DO_NOT_CLEAR_MEMORY,
460
461 R9_CURSER_ROW_25,
462
463 R10_CURSER_COLUMN_8,
464
465 COMMAND_END) ||
466 i2c_getdata(t, 1, &row_25_column_8))
467 {
468 return -EIO;
469 }
470 row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND;
471 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
472
473 dau_no |
474 R8_DO_NOT_CLEAR_MEMORY,
475
476 R9_CURSER_ROW_25,
477
478 R10_CURSER_COLUMN_8,
479
480 row_25_column_8,
481
482 COMMAND_END))
483 {
484 return -EIO;
485 }
486
487 return 0;
488}
489
490/* Requests one videotext page as described in req. The fields of req are
491 * checked and an error is returned if something is invalid.
492 *
493 * Return value: 0 if successful
494 */
495static int saa5246a_request_page(struct saa5246a_device *t,
496 vtx_pagereq_t *req)
497{
498 if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX)
499 return -EINVAL;
500 if (req->pagemask & PGMASK_PAGE)
501 if (req->page < 0 || req->page > PAGE_MAX)
502 return -EINVAL;
503 if (req->pagemask & PGMASK_HOUR)
504 if (req->hour < 0 || req->hour > HOUR_MAX)
505 return -EINVAL;
506 if (req->pagemask & PGMASK_MINUTE)
507 if (req->minute < 0 || req->minute > MINUTE_MAX)
508 return -EINVAL;
509 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
510 return -EINVAL;
511
512 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
513
514 R2_IN_R3_SELECT_PAGE_HUNDREDS |
515 req->pgbuf << 4 |
516 R2_BANK_0 |
517 R2_HAMMING_CHECK_OFF,
518
519 HUNDREDS_OF_PAGE(req->page) |
520 R3_HOLD_PAGE |
521 (req->pagemask & PG_HUND ?
522 R3_PAGE_HUNDREDS_DO_CARE :
523 R3_PAGE_HUNDREDS_DO_NOT_CARE),
524
525 TENS_OF_PAGE(req->page) |
526 (req->pagemask & PG_TEN ?
527 R3_PAGE_TENS_DO_CARE :
528 R3_PAGE_TENS_DO_NOT_CARE),
529
530 UNITS_OF_PAGE(req->page) |
531 (req->pagemask & PG_UNIT ?
532 R3_PAGE_UNITS_DO_CARE :
533 R3_PAGE_UNITS_DO_NOT_CARE),
534
535 TENS_OF_HOUR(req->hour) |
536 (req->pagemask & HR_TEN ?
537 R3_HOURS_TENS_DO_CARE :
538 R3_HOURS_TENS_DO_NOT_CARE),
539
540 UNITS_OF_HOUR(req->hour) |
541 (req->pagemask & HR_UNIT ?
542 R3_HOURS_UNITS_DO_CARE :
543 R3_HOURS_UNITS_DO_NOT_CARE),
544
545 TENS_OF_MINUTE(req->minute) |
546 (req->pagemask & MIN_TEN ?
547 R3_MINUTES_TENS_DO_CARE :
548 R3_MINUTES_TENS_DO_NOT_CARE),
549
550 UNITS_OF_MINUTE(req->minute) |
551 (req->pagemask & MIN_UNIT ?
552 R3_MINUTES_UNITS_DO_CARE :
553 R3_MINUTES_UNITS_DO_NOT_CARE),
554
555 COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2,
556
557 R2_IN_R3_SELECT_PAGE_HUNDREDS |
558 req->pgbuf << 4 |
559 R2_BANK_0 |
560 R2_HAMMING_CHECK_OFF,
561
562 HUNDREDS_OF_PAGE(req->page) |
563 R3_UPDATE_PAGE |
564 (req->pagemask & PG_HUND ?
565 R3_PAGE_HUNDREDS_DO_CARE :
566 R3_PAGE_HUNDREDS_DO_NOT_CARE),
567
568 COMMAND_END))
569 {
570 return -EIO;
571 }
572
e8be02a3 573 t->is_searching[req->pgbuf] = true;
1da177e4
LT		 574 return 0;
575}
576
577/* This routine decodes the page number from the infobits contained in line 25.
578 *
579 * Parameters:
580 * infobits: must be bits 0 to 9 of column 25
581 *
582 * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123
583 */
584static inline int saa5246a_extract_pagenum_from_infobits(
585 unsigned char infobits[10])
586{
587 int page_hundreds, page_tens, page_units;
588
589 page_units = infobits[0] & ROW25_COLUMN0_PAGE_UNITS;
590 page_tens = infobits[1] & ROW25_COLUMN1_PAGE_TENS;
591 page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS;
592
593 /* page 0x.. means page 8.. */
594 if (page_hundreds == 0)
595 page_hundreds = 8;
596
597 return((page_hundreds << 8) | (page_tens << 4) | page_units);
598}
599
600/* Decodes the hour from the infobits contained in line 25.
601 *
602 * Parameters:
603 * infobits: must be bits 0 to 9 of column 25
604 *
605 * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12
606 */
607static inline int saa5246a_extract_hour_from_infobits(
608 unsigned char infobits[10])
609{
610 int hour_tens, hour_units;
611
612 hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS;
613 hour_tens = infobits[5] & ROW25_COLUMN5_HOUR_TENS;
614
615 return((hour_tens << 4) | hour_units);
616}
617
618/* Decodes the minutes from the infobits contained in line 25.
619 *
620 * Parameters:
621 * infobits: must be bits 0 to 9 of column 25
622 *
623 * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10
624 */
625static inline int saa5246a_extract_minutes_from_infobits(
626 unsigned char infobits[10])
627{
628 int minutes_tens, minutes_units;
629
630 minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS;
631 minutes_tens = infobits[3] & ROW25_COLUMN3_MINUTES_TENS;
632
633 return((minutes_tens << 4) | minutes_units);
634}
635
636/* Reads the status bits contained in the first 10 columns of the first line
637 * and extracts the information into info.
638 *
639 * Return value: 0 if successful
640 */
641static inline int saa5246a_get_status(struct saa5246a_device *t,
642 vtx_pageinfo_t *info, unsigned char dau_no)
643{
644 unsigned char infobits[10];
645 int column;
646
647 if (dau_no >= NUM_DAUS)
648 return -EINVAL;
649
650 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
651
652 dau_no |
653 R8_DO_NOT_CLEAR_MEMORY,
654
655 R9_CURSER_ROW_25,
656
657 R10_CURSER_COLUMN_0,
658
659 COMMAND_END) ||
660 i2c_getdata(t, 10, infobits))
661 {
662 return -EIO;
663 }
664
665 info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits);
666 info->hour = saa5246a_extract_hour_from_infobits(infobits);
667 info->minute = saa5246a_extract_minutes_from_infobits(infobits);
668 info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1);
669 info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE);
670 info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE);
671 info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE);
672 info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER);
673 info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE);
674 info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE);
675 info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY);
676 info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE);
677 info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND);
678 info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR);
679 info->hamming = 0;
680 for (column = 0; column <= 7; column++) {
681 if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) {
682 info->hamming = 1;
683 break;
684 }
685 }
686 if (!info->hamming && !info->notfound)
e8be02a3 687 t->is_searching[dau_no] = false;
1da177e4
LT		 688 return 0;
689}
690
691/* Reads 1 videotext page buffer of the SAA5246A.
692 *
693 * req is used both as input and as output. It contains information which part
694 * must be read. The videotext page is copied into req->buffer.
695 *
696 * Return value: 0 if successful
697 */
698static inline int saa5246a_get_page(struct saa5246a_device *t,
699 vtx_pagereq_t *req)
700{
701 int start, end, size;
702 char *buf;
703 int err;
704
705 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
706 req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
707 return -EINVAL;
708
709 buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL);
710 if (!buf)
711 return -ENOMEM;
712
713 /* Read "normal" part of page */
714 err = -EIO;
715
716 end = min(req->end, VTX_PAGESIZE - 1);
717 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
718 req->pgbuf | R8_DO_NOT_CLEAR_MEMORY,
719 ROW(req->start), COLUMN(req->start), COMMAND_END))
720 goto out;
721 if (i2c_getdata(t, end - req->start + 1, buf))
722 goto out;
723 err = -EFAULT;
724 if (copy_to_user(req->buffer, buf, end - req->start + 1))
725 goto out;
726
727 /* Always get the time from buffer 4, since this stupid SAA5246A only
728 * updates the currently displayed buffer...
729 */
730 if (REQ_CONTAINS_TIME(req)) {
731 start = max(req->start, POS_TIME_START);
732 end = min(req->end, POS_TIME_END);
733 size = end - start + 1;
734 err = -EINVAL;
735 if (size < 0)
736 goto out;
737 err = -EIO;
738 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
739 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
740 R9_CURSER_ROW_0, start, COMMAND_END))
741 goto out;
742 if (i2c_getdata(t, size, buf))
743 goto out;
744 err = -EFAULT;
745 if (copy_to_user(req->buffer + start - req->start, buf, size))
746 goto out;
747 }
748 /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */
749 if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) {
750 start = max(req->start, POS_HEADER_START);
751 end = min(req->end, POS_HEADER_END);
752 size = end - start + 1;
753 err = -EINVAL;
754 if (size < 0)
755 goto out;
756 err = -EIO;
757 if (i2c_senddata(t, SAA5246A_REGISTER_R8,
758 R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY,
759 R9_CURSER_ROW_0, start, COMMAND_END))
760 goto out;
761 if (i2c_getdata(t, end - start + 1, buf))
762 goto out;
763 err = -EFAULT;
764 if (copy_to_user(req->buffer + start - req->start, buf, size))
765 goto out;
766 }
767 err = 0;
768out:
769 kfree(buf);
770 return err;
771}
772
773/* Stops the acquisition circuit given in dau_no. The page buffer associated
774 * with this acquisition circuit will no more be updated. The other daus are
775 * not affected.
776 *
777 * Return value: 0 if successful
778 */
779static inline int saa5246a_stop_dau(struct saa5246a_device *t,
780 unsigned char dau_no)
781{
782 if (dau_no >= NUM_DAUS)
783 return -EINVAL;
784 if (i2c_senddata(t, SAA5246A_REGISTER_R2,
785
786 R2_IN_R3_SELECT_PAGE_HUNDREDS |
787 dau_no << 4 |
788 R2_BANK_0 |
789 R2_HAMMING_CHECK_OFF,
790
791 R3_PAGE_HUNDREDS_0 |
792 R3_HOLD_PAGE |
793 R3_PAGE_HUNDREDS_DO_NOT_CARE,
794
795 COMMAND_END))
796 {
797 return -EIO;
798 }
e8be02a3 799 t->is_searching[dau_no] = false;
1da177e4
LT		 800 return 0;
801}
802
803/* Handles ioctls defined in videotext.h
804 *
805 * Returns 0 if successful
806 */
069b7479 807static long do_saa5246a_ioctl(struct file *file, unsigned int cmd, void *arg)
1da177e4 808{
c170ecf4 809 struct saa5246a_device *t = video_drvdata(file);
601e9444 810
1da177e4
LT		 811 switch(cmd)
812 {
813 case VTXIOCGETINFO:
814 {
815 vtx_info_t *info = arg;
816
817 info->version_major = MAJOR_VERSION;
818 info->version_minor = MINOR_VERSION;
819 info->numpages = NUM_DAUS;
820 return 0;
821 }
822
823 case VTXIOCCLRPAGE:
824 {
825 vtx_pagereq_t *req = arg;
826
827 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
828 return -EINVAL;
829 memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0]));
830 return 0;
831 }
832
833 case VTXIOCCLRFOUND:
834 {
835 vtx_pagereq_t *req = arg;
836
837 if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
838 return -EINVAL;
839 return(saa5246a_clear_found_bit(t, req->pgbuf));
840 }
841
842 case VTXIOCPAGEREQ:
843 {
844 vtx_pagereq_t *req = arg;
845
846 return(saa5246a_request_page(t, req));
847 }
848
849 case VTXIOCGETSTAT:
850 {
851 vtx_pagereq_t *req = arg;
852 vtx_pageinfo_t info;
853 int rval;
854
855 if ((rval = saa5246a_get_status(t, &info, req->pgbuf)))
856 return rval;
857 if(copy_to_user(req->buffer, &info,
858 sizeof(vtx_pageinfo_t)))
859 return -EFAULT;
860 return 0;
861 }
862
863 case VTXIOCGETPAGE:
864 {
865 vtx_pagereq_t *req = arg;
866
867 return(saa5246a_get_page(t, req));
868 }
869
870 case VTXIOCSTOPDAU:
871 {
872 vtx_pagereq_t *req = arg;
873
874 return(saa5246a_stop_dau(t, req->pgbuf));
875 }
876
877 case VTXIOCPUTPAGE:
878 case VTXIOCSETDISP:
879 case VTXIOCPUTSTAT:
880 return 0;
881
882 case VTXIOCCLRCACHE:
883 {
884 return 0;
885 }
886
887 case VTXIOCSETVIRT:
888 {
889 /* I do not know what "virtual mode" means */
890 return 0;
891 }
892 }
893 return -EINVAL;
894}
895
896/*
897 * Translates old vtx IOCTLs to new ones
898 *
899 * This keeps new kernel versions compatible with old userspace programs.
900 */
901static inline unsigned int vtx_fix_command(unsigned int cmd)
902{
903 switch (cmd) {
904 case VTXIOCGETINFO_OLD:
905 cmd = VTXIOCGETINFO;
906 break;
907 case VTXIOCCLRPAGE_OLD:
908 cmd = VTXIOCCLRPAGE;
909 break;
910 case VTXIOCCLRFOUND_OLD:
911 cmd = VTXIOCCLRFOUND;
912 break;
913 case VTXIOCPAGEREQ_OLD:
914 cmd = VTXIOCPAGEREQ;
915 break;
916 case VTXIOCGETSTAT_OLD:
917 cmd = VTXIOCGETSTAT;
918 break;
919 case VTXIOCGETPAGE_OLD:
920 cmd = VTXIOCGETPAGE;
921 break;
922 case VTXIOCSTOPDAU_OLD:
923 cmd = VTXIOCSTOPDAU;
924 break;
925 case VTXIOCPUTPAGE_OLD:
926 cmd = VTXIOCPUTPAGE;
927 break;
928 case VTXIOCSETDISP_OLD:
929 cmd = VTXIOCSETDISP;
930 break;
931 case VTXIOCPUTSTAT_OLD:
932 cmd = VTXIOCPUTSTAT;
933 break;
934 case VTXIOCCLRCACHE_OLD:
935 cmd = VTXIOCCLRCACHE;
936 break;
937 case VTXIOCSETVIRT_OLD:
938 cmd = VTXIOCSETVIRT;
939 break;
940 }
941 return cmd;
942}
943
944/*
945 * Handle the locking
946 */
069b7479 947static long saa5246a_ioctl(struct file *file,
1da177e4
LT		 948 unsigned int cmd, unsigned long arg)
949{
c170ecf4 950 struct saa5246a_device *t = video_drvdata(file);
069b7479 951 long err;
1da177e4
LT		 952
953 cmd = vtx_fix_command(cmd);
3593cab5 954 mutex_lock(&t->lock);
f473bf76 955 err = video_usercopy(file, cmd, arg, do_saa5246a_ioctl);
3593cab5 956 mutex_unlock(&t->lock);
1da177e4
LT		 957 return err;
958}
959
bec43661 960static int saa5246a_open(struct file *file)
1da177e4 961{
c170ecf4 962 struct saa5246a_device *t = video_drvdata(file);
1da177e4 963
7d43cd53
HV		 964 if (t->client == NULL)
965 return -ENODEV;
1da177e4 966
7d43cd53
HV		 967 if (test_and_set_bit(0, &t->in_use))
968 return -EBUSY;
1da177e4
LT		 969
970 if (i2c_senddata(t, SAA5246A_REGISTER_R0,
1da177e4
LT		 971 R0_SELECT_R11 |
972 R0_PLL_TIME_CONSTANT_LONG |
973 R0_ENABLE_nODD_EVEN_OUTPUT |
974 R0_ENABLE_HDR_POLL |
975 R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED |
976 R0_NO_FREE_RUN_PLL |
977 R0_NO_AUTOMATIC_FASTEXT_PROMPT,
978
979 R1_NON_INTERLACED_312_312_LINES |
980 R1_DEW |
981 R1_EXTENDED_PACKET_DISABLE |
982 R1_DAUS_ALL_ON |
983 R1_8_BITS_NO_PARITY |
984 R1_VCS_TO_SCS,
985
986 COMMAND_END) ||
987 i2c_senddata(t, SAA5246A_REGISTER_R4,
988
989 /* We do not care much for the TV display but nevertheless we
990 * need the currently displayed page later because only on that
991 * page the time is updated. */
992 R4_DISPLAY_PAGE_4,
993
994 COMMAND_END))
995 {
7d43cd53
HV		 996 clear_bit(0, &t->in_use);
997 return -EIO;
1da177e4 998 }
1da177e4 999 return 0;
1da177e4
LT		 1000}
1001
bec43661 1002static int saa5246a_release(struct file *file)
1da177e4 1003{
c170ecf4 1004 struct saa5246a_device *t = video_drvdata(file);
1da177e4
LT		 1005
1006 /* Stop all acquisition circuits. */
1007 i2c_senddata(t, SAA5246A_REGISTER_R1,
1008
1009 R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES |
1010 R1_DEW |
1011 R1_EXTENDED_PACKET_DISABLE |
1012 R1_DAUS_ALL_OFF |
1013 R1_8_BITS_NO_PARITY |
1014 R1_VCS_TO_SCS,
1015
1016 COMMAND_END);
7d43cd53 1017 clear_bit(0, &t->in_use);
1da177e4
LT		 1018 return 0;
1019}
1020
bec43661 1021static const struct v4l2_file_operations saa_fops = {
1da177e4
LT		 1022 .owner = THIS_MODULE,
1023 .open = saa5246a_open,
1024 .release = saa5246a_release,
1025 .ioctl = saa5246a_ioctl,
1da177e4
LT		 1026};
1027
1028static struct video_device saa_template =
1029{
71ef85c7 1030 .name = "saa5246a",
1da177e4
LT		 1031 .fops = &saa_fops,
1032 .release = video_device_release,
1033 .minor = -1,
1034};
71ef85c7
HV		 1035
1036/* Addresses to scan */
1037static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
1038
1039I2C_CLIENT_INSMOD;
1040
1041static int saa5246a_probe(struct i2c_client *client,
1042 const struct i2c_device_id *id)
1043{
1044 int pgbuf;
1045 int err;
1046 struct video_device *vd;
1047 struct saa5246a_device *t;
1048
1049 v4l_info(client, "chip found @ 0x%x (%s)\n",
1050 client->addr << 1, client->adapter->name);
1051 v4l_info(client, "VideoText version %d.%d\n",
1052 MAJOR_VERSION, MINOR_VERSION);
1053 t = kzalloc(sizeof(*t), GFP_KERNEL);
1054 if (t == NULL)
1055 return -ENOMEM;
1056 mutex_init(&t->lock);
1057
1058 /* Now create a video4linux device */
1059 vd = video_device_alloc();
1060 if (vd == NULL) {
1061 kfree(t);
1062 return -ENOMEM;
1063 }
1064 i2c_set_clientdata(client, vd);
1065 memcpy(vd, &saa_template, sizeof(*vd));
1066
1067 for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
1068 memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
1069 t->is_searching[pgbuf] = false;
1070 }
1071 video_set_drvdata(vd, t);
1072
1073 /* Register it */
1074 err = video_register_device(vd, VFL_TYPE_VTX, -1);
1075 if (err < 0) {
1076 kfree(t);
1077 video_device_release(vd);
1078 return err;
1079 }
1080 t->client = client;
1081 return 0;
1082}
1083
1084static int saa5246a_remove(struct i2c_client *client)
1085{
1086 struct video_device *vd = i2c_get_clientdata(client);
1087
1088 video_unregister_device(vd);
1089 kfree(video_get_drvdata(vd));
1090 return 0;
1091}
1092
1093static const struct i2c_device_id saa5246a_id[] = {
1094 { "saa5246a", 0 },
1095 { }
1096};
1097MODULE_DEVICE_TABLE(i2c, saa5246a_id);
1098
1099static struct v4l2_i2c_driver_data v4l2_i2c_data = {
1100 .name = "saa5246a",
1101 .driverid = I2C_DRIVERID_SAA5249,
1102 .probe = saa5246a_probe,
1103 .remove = saa5246a_remove,
1104 .id_table = saa5246a_id,
1105};
kernel source for telekom puls (alcatel/mediatek)