V4L/DVB (6027): Get rid of an ill-behaved msleep in i2c write
[linux-2.6] / drivers / media / video / saa711x.c
1 /*
2  * saa711x - Philips SAA711x video decoder driver version 0.0.1
3  *
4  * To do: Now, it handles only saa7113/7114. Should be improved to
5  * handle all Philips saa711x devices.
6  *
7  * Based on saa7113 driver from Dave Perks <dperks@ibm.net>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  */
23
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/errno.h>
28 #include <linux/fs.h>
29 #include <linux/kernel.h>
30 #include <linux/major.h>
31 #include <linux/slab.h>
32 #include <linux/mm.h>
33 #include <linux/signal.h>
34 #include <asm/io.h>
35 #include <asm/pgtable.h>
36 #include <asm/page.h>
37 #include <linux/types.h>
38 #include <asm/uaccess.h>
39 #include <linux/videodev.h>
40
41 MODULE_DESCRIPTION("Philips SAA711x video decoder driver");
42 MODULE_AUTHOR("Dave Perks, Jose Ignacio Gijon, Joerg Heckenbach, Mark McClelland, Dwaine Garden");
43 MODULE_LICENSE("GPL");
44
45 #include <linux/i2c.h>
46
47 #define I2C_NAME(s) (s)->name
48
49 #include <linux/video_decoder.h>
50
51 static int debug = 0;
52 module_param(debug, int, 0644);
53 MODULE_PARM_DESC(debug, " Set the default Debug level.  Default: 0 (Off) - (0-1)");
54
55
56 #define dprintk(num, format, args...) \
57         do { \
58                 if (debug >= num) \
59                         printk(format, ##args); \
60         } while (0)
61
62 /* ----------------------------------------------------------------------- */
63
64 struct saa711x {
65         unsigned char reg[32];
66
67         int norm;
68         int input;
69         int enable;
70         int bright;
71         int contrast;
72         int hue;
73         int sat;
74 };
75
76 #define   I2C_SAA7113        0x4A
77 #define   I2C_SAA7114        0x42
78
79 /* ----------------------------------------------------------------------- */
80
81 static inline int
82 saa711x_write (struct i2c_client *client,
83                u8                 reg,
84                u8                 value)
85 {
86         struct saa711x *decoder = i2c_get_clientdata(client);
87
88         decoder->reg[reg] = value;
89         return i2c_smbus_write_byte_data(client, reg, value);
90 }
91
92 static int
93 saa711x_write_block (struct i2c_client *client,
94                      const u8          *data,
95                      unsigned int       len)
96 {
97         int ret = -1;
98         u8 reg;
99
100         /* the saa711x has an autoincrement function, use it if
101          * the adapter understands raw I2C */
102         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
103                 /* do raw I2C, not smbus compatible */
104                 struct saa711x *decoder = i2c_get_clientdata(client);
105                 struct i2c_msg msg;
106                 u8 block_data[32];
107
108                 msg.addr = client->addr;
109                 msg.flags = 0;
110                 while (len >= 2) {
111                         msg.buf = (char *) block_data;
112                         msg.len = 0;
113                         block_data[msg.len++] = reg = data[0];
114                         do {
115                                 block_data[msg.len++] =
116                                     decoder->reg[reg++] = data[1];
117                                 len -= 2;
118                                 data += 2;
119                         } while (len >= 2 && data[0] == reg &&
120                                  msg.len < 32);
121                         if ((ret = i2c_transfer(client->adapter,
122                                                 &msg, 1)) < 0)
123                                 break;
124                 }
125         } else {
126                 /* do some slow I2C emulation kind of thing */
127                 while (len >= 2) {
128                         reg = *data++;
129                         if ((ret = saa711x_write(client, reg,
130                                                  *data++)) < 0)
131                                 break;
132                         len -= 2;
133                 }
134         }
135
136         return ret;
137 }
138
139 static int
140 saa711x_init_decoder (struct i2c_client *client,
141               struct video_decoder_init *init)
142 {
143         return saa711x_write_block(client, init->data, init->len);
144 }
145
146 static inline int
147 saa711x_read (struct i2c_client *client,
148               u8                 reg)
149 {
150         return i2c_smbus_read_byte_data(client, reg);
151 }
152
153 /* ----------------------------------------------------------------------- */
154
155 static const unsigned char saa711x_i2c_init[] = {
156         0x00, 0x00,     /* PH711x_CHIP_VERSION 00 - ID byte */
157         0x01, 0x08,     /* PH711x_INCREMENT_DELAY - (1) (1) (1) (1) IDEL3 IDEL2 IDELL1 IDEL0 */
158         0x02, 0xc0,     /* PH711x_ANALOG_INPUT_CONTR_1 - FUSE1 FUSE0 GUDL1 GUDL0 MODE3 MODE2 MODE1 MODE0 */
159         0x03, 0x23,     /* PH711x_ANALOG_INPUT_CONTR_2 - (1) HLNRS VBSL WPOFF HOLDG GAFIX GAI28 GAI18 */
160         0x04, 0x00,     /* PH711x_ANALOG_INPUT_CONTR_3 - GAI17 GAI16 GAI15 GAI14 GAI13 GAI12 GAI11 GAI10 */
161         0x05, 0x00,     /* PH711x_ANALOG_INPUT_CONTR_4 - GAI27 GAI26 GAI25 GAI24 GAI23 GAI22 GAI21 GAI20 */
162         0x06, 0xeb,     /* PH711x_HORIZONTAL_SYNC_START - HSB7 HSB6 HSB5 HSB4 HSB3 HSB2 HSB1 HSB0 */
163         0x07, 0xe0,     /* PH711x_HORIZONTAL_SYNC_STOP - HSS7 HSS6 HSS5 HSS4 HSS3 HSS2 HSS1 HSS0 */
164         0x08, 0x88,     /* PH711x_SYNC_CONTROL - AUFD FSEL FOET HTC1 HTC0 HPLL VNOI1 VNOI0 */
165         0x09, 0x00,     /* PH711x_LUMINANCE_CONTROL - BYPS PREF BPSS1 BPSS0 VBLB UPTCV APER1 APER0 */
166         0x0a, 0x80,     /* PH711x_LUMINANCE_BRIGHTNESS - BRIG7 BRIG6 BRIG5 BRIG4 BRIG3 BRIG2 BRIG1 BRIG0 */
167         0x0b, 0x47,     /* PH711x_LUMINANCE_CONTRAST - CONT7 CONT6 CONT5 CONT4 CONT3 CONT2 CONT1 CONT0 */
168         0x0c, 0x40,     /* PH711x_CHROMA_SATURATION - SATN7 SATN6 SATN5 SATN4 SATN3 SATN2 SATN1 SATN0 */
169         0x0d, 0x00,     /* PH711x_CHROMA_HUE_CONTROL - HUEC7 HUEC6 HUEC5 HUEC4 HUEC3 HUEC2 HUEC1 HUEC0 */
170         0x0e, 0x01,     /* PH711x_CHROMA_CONTROL - CDTO CSTD2 CSTD1 CSTD0 DCCF FCTC CHBW1 CHBW0 */
171         0x0f, 0xaa,     /* PH711x_CHROMA_GAIN_CONTROL - ACGC CGAIN6 CGAIN5 CGAIN4 CGAIN3 CGAIN2 CGAIN1 CGAIN0 */
172         0x10, 0x00,     /* PH711x_FORMAT_DELAY_CONTROL - OFTS1 OFTS0 HDEL1 HDEL0 VRLN YDEL2 YDEL1 YDEL0 */
173         0x11, 0x1C,     /* PH711x_OUTPUT_CONTROL_1 - GPSW1 CM99 GPSW0 HLSEL OEYC OERT VIPB COLO */
174         0x12, 0x01,     /* PH711x_OUTPUT_CONTROL_2 - RTSE13 RTSE12 RTSE11 RTSE10 RTSE03 RTSE02 RTSE01 RTSE00 */
175         0x13, 0x00,     /* PH711x_OUTPUT_CONTROL_3 - ADLSB (1) (1) OLDSB FIDP (1) AOSL1 AOSL0 */
176         0x14, 0x00,     /* RESERVED 14 - (1) (1) (1) (1) (1) (1) (1) (1) */
177         0x15, 0x00,     /* PH711x_V_GATE1_START - VSTA7 VSTA6 VSTA5 VSTA4 VSTA3 VSTA2 VSTA1 VSTA0 */
178         0x16, 0x00,     /* PH711x_V_GATE1_STOP - VSTO7 VSTO6 VSTO5 VSTO4 VSTO3 VSTO2 VSTO1 VSTO0 */
179         0x17, 0x00,     /* PH711x_V_GATE1_MSB - (1) (1) (1) (1) (1) (1) VSTO8 VSTA8 */
180 };
181
182 static int
183 saa711x_command (struct i2c_client *client,
184                  unsigned int       cmd,
185                  void              *arg)
186 {
187         struct saa711x *decoder = i2c_get_clientdata(client);
188
189         switch (cmd) {
190
191         case 0:
192         case DECODER_INIT:
193         {
194                 struct video_decoder_init *init = arg;
195                 if (NULL != init)
196                         return saa711x_init_decoder(client, init);
197                 else {
198                         struct video_decoder_init vdi;
199                         vdi.data = saa711x_i2c_init;
200                         vdi.len = sizeof(saa711x_i2c_init);
201                         return saa711x_init_decoder(client, &vdi);
202                 }
203         }
204
205         case DECODER_DUMP:
206         {
207                 int i;
208
209                 for (i = 0; i < 32; i += 16) {
210                         int j;
211
212                         printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
213                         for (j = 0; j < 16; ++j) {
214                                 printk(" %02x",
215                                        saa711x_read(client, i + j));
216                         }
217                         printk("\n");
218                 }
219         }
220                 break;
221
222         case DECODER_GET_CAPABILITIES:
223         {
224                 struct video_decoder_capability *cap = arg;
225
226                 cap->flags = VIDEO_DECODER_PAL |
227                              VIDEO_DECODER_NTSC |
228                              VIDEO_DECODER_SECAM |
229                              VIDEO_DECODER_AUTO |
230                              VIDEO_DECODER_CCIR;
231                 cap->inputs = 8;
232                 cap->outputs = 1;
233         }
234                 break;
235
236         case DECODER_GET_STATUS:
237         {
238                 int *iarg = arg;
239                 int status;
240                 int res;
241
242                 status = saa711x_read(client, 0x1f);
243                 dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
244                         status);
245                 res = 0;
246                 if ((status & (1 << 6)) == 0) {
247                         res |= DECODER_STATUS_GOOD;
248                 }
249                 switch (decoder->norm) {
250                 case VIDEO_MODE_NTSC:
251                         res |= DECODER_STATUS_NTSC;
252                         break;
253                 case VIDEO_MODE_PAL:
254                         res |= DECODER_STATUS_PAL;
255                         break;
256                 case VIDEO_MODE_SECAM:
257                         res |= DECODER_STATUS_SECAM;
258                         break;
259                 default:
260                 case VIDEO_MODE_AUTO:
261                         if ((status & (1 << 5)) != 0) {
262                                 res |= DECODER_STATUS_NTSC;
263                         } else {
264                                 res |= DECODER_STATUS_PAL;
265                         }
266                         break;
267                 }
268                 if ((status & (1 << 0)) != 0) {
269                         res |= DECODER_STATUS_COLOR;
270                 }
271                 *iarg = res;
272         }
273                 break;
274
275         case DECODER_SET_GPIO:
276         {
277                 int *iarg = arg;
278                 if (0 != *iarg) {
279                         saa711x_write(client, 0x11,
280                                 (decoder->reg[0x11] | 0x80));
281                 } else {
282                         saa711x_write(client, 0x11,
283                                 (decoder->reg[0x11] & 0x7f));
284                 }
285                 break;
286         }
287
288         case DECODER_SET_VBI_BYPASS:
289         {
290                 int *iarg = arg;
291                 if (0 != *iarg) {
292                         saa711x_write(client, 0x13,
293                                 (decoder->reg[0x13] & 0xf0) | 0x0a);
294                 } else {
295                         saa711x_write(client, 0x13,
296                                 (decoder->reg[0x13] & 0xf0));
297                 }
298                 break;
299         }
300
301         case DECODER_SET_NORM:
302         {
303                 int *iarg = arg;
304
305                 switch (*iarg) {
306
307                 case VIDEO_MODE_NTSC:
308                         saa711x_write(client, 0x08,
309                                       (decoder->reg[0x08] & 0x3f) | 0x40);
310                         saa711x_write(client, 0x0e,
311                                       (decoder->reg[0x0e] & 0x8f));
312                         break;
313
314                 case VIDEO_MODE_PAL:
315                         saa711x_write(client, 0x08,
316                                       (decoder->reg[0x08] & 0x3f) | 0x00);
317                         saa711x_write(client, 0x0e,
318                                       (decoder->reg[0x0e] & 0x8f));
319                         break;
320
321                 case VIDEO_MODE_SECAM:
322                         saa711x_write(client, 0x08,
323                                       (decoder->reg[0x08] & 0x3f) | 0x00);
324                         saa711x_write(client, 0x0e,
325                                       (decoder->reg[0x0e] & 0x8f) | 0x50);
326                         break;
327
328                 case VIDEO_MODE_AUTO:
329                         saa711x_write(client, 0x08,
330                                       (decoder->reg[0x08] & 0x3f) | 0x80);
331                         saa711x_write(client, 0x0e,
332                                       (decoder->reg[0x0e] & 0x8f));
333                         break;
334
335                 default:
336                         return -EINVAL;
337
338                 }
339                 decoder->norm = *iarg;
340         }
341                 break;
342
343         case DECODER_SET_INPUT:
344         {
345                 int *iarg = arg;
346                 if (*iarg < 0 || *iarg > 9) {
347                         return -EINVAL;
348                 }
349                 if (decoder->input != *iarg) {
350                         decoder->input = *iarg;
351                         /* select mode */
352                         saa711x_write(client, 0x02,
353                                       (decoder->reg[0x02] & 0xf0) | decoder->input);
354                         /* bypass chrominance trap for modes 4..7 */
355                         saa711x_write(client, 0x09,
356                                       (decoder->reg[0x09] & 0x7f) | ((decoder->input > 3) ? 0x80 : 0));
357                 }
358         }
359                 break;
360
361         case DECODER_SET_OUTPUT:
362         {
363                 int *iarg = arg;
364
365                 /* not much choice of outputs */
366                 if (*iarg != 0) {
367                         return -EINVAL;
368                 }
369         }
370                 break;
371
372         case DECODER_ENABLE_OUTPUT:
373         {
374                 int *iarg = arg;
375                 int enable = (*iarg != 0);
376
377                 if (decoder->enable != enable) {
378                         decoder->enable = enable;
379
380                         /* RJ: If output should be disabled (for
381                          * playing videos), we also need a open PLL.
382                          * The input is set to 0 (where no input
383                          * source is connected), although this
384                          * is not necessary.
385                          *
386                          * If output should be enabled, we have to
387                          * reverse the above.
388                          */
389
390                         if (decoder->enable) {
391                                 saa711x_write(client, 0x02,
392                                               (decoder->
393                                                reg[0x02] & 0xf8) |
394                                               decoder->input);
395                                 saa711x_write(client, 0x08,
396                                               (decoder->reg[0x08] & 0xfb));
397                                 saa711x_write(client, 0x11,
398                                               (decoder->
399                                                reg[0x11] & 0xf3) | 0x0c);
400                         } else {
401                                 saa711x_write(client, 0x02,
402                                               (decoder->reg[0x02] & 0xf8));
403                                 saa711x_write(client, 0x08,
404                                               (decoder->
405                                                reg[0x08] & 0xfb) | 0x04);
406                                 saa711x_write(client, 0x11,
407                                               (decoder->reg[0x11] & 0xf3));
408                         }
409                 }
410         }
411                 break;
412
413         case DECODER_SET_PICTURE:
414         {
415                 struct video_picture *pic = arg;
416
417                 if (decoder->bright != pic->brightness) {
418                         /* We want 0 to 255 we get 0-65535 */
419                         decoder->bright = pic->brightness;
420                         saa711x_write(client, 0x0a, decoder->bright >> 8);
421                 }
422                 if (decoder->contrast != pic->contrast) {
423                         /* We want 0 to 127 we get 0-65535 */
424                         decoder->contrast = pic->contrast;
425                         saa711x_write(client, 0x0b,
426                                       decoder->contrast >> 9);
427                 }
428                 if (decoder->sat != pic->colour) {
429                         /* We want 0 to 127 we get 0-65535 */
430                         decoder->sat = pic->colour;
431                         saa711x_write(client, 0x0c, decoder->sat >> 9);
432                 }
433                 if (decoder->hue != pic->hue) {
434                         /* We want -128 to 127 we get 0-65535 */
435                         decoder->hue = pic->hue;
436                         saa711x_write(client, 0x0d,
437                                       (decoder->hue - 32768) >> 8);
438                 }
439         }
440                 break;
441
442         default:
443                 return -EINVAL;
444         }
445
446         return 0;
447 }
448
449 /* ----------------------------------------------------------------------- */
450
451 /*
452  * Generic i2c probe
453  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
454  */
455
456 /* standard i2c insmod options */
457 static unsigned short normal_i2c[] = {
458         I2C_SAA7113>>1,         /* saa7113 */
459         I2C_SAA7114>>1,         /* saa7114 */
460         I2C_CLIENT_END
461 };
462
463 I2C_CLIENT_INSMOD;
464
465
466 static struct i2c_driver i2c_driver_saa711x;
467
468 static int
469 saa711x_detect_client (struct i2c_adapter *adapter,
470                        int                 address,
471                        int                 kind)
472 {
473         int i;
474         struct i2c_client *client;
475         struct saa711x *decoder;
476         struct video_decoder_init vdi;
477
478         dprintk(1,
479                 KERN_INFO
480                 "saa711x.c: detecting saa711x client on address 0x%x\n",
481                 address << 1);
482
483         /* Check if the adapter supports the needed features */
484         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
485                 return 0;
486
487         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
488         if (client == 0)
489                 return -ENOMEM;
490         client->addr = address;
491         client->adapter = adapter;
492         client->driver = &i2c_driver_saa711x;
493         strlcpy(I2C_NAME(client), "saa711x", sizeof(I2C_NAME(client)));
494         decoder = kzalloc(sizeof(struct saa711x), GFP_KERNEL);
495         if (decoder == NULL) {
496                 kfree(client);
497                 return -ENOMEM;
498         }
499         decoder->norm = VIDEO_MODE_NTSC;
500         decoder->input = 0;
501         decoder->enable = 1;
502         decoder->bright = 32768;
503         decoder->contrast = 32768;
504         decoder->hue = 32768;
505         decoder->sat = 32768;
506         i2c_set_clientdata(client, decoder);
507
508         i = i2c_attach_client(client);
509         if (i) {
510                 kfree(client);
511                 kfree(decoder);
512                 return i;
513         }
514
515         vdi.data = saa711x_i2c_init;
516         vdi.len = sizeof(saa711x_i2c_init);
517         i = saa711x_init_decoder(client, &vdi);
518         if (i < 0) {
519                 dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
520                         I2C_NAME(client), i);
521         } else {
522                 dprintk(1,
523                         KERN_INFO
524                         "%s_attach: chip version %x at address 0x%x\n",
525                         I2C_NAME(client), saa711x_read(client, 0x00) >> 4,
526                         client->addr << 1);
527         }
528
529         return 0;
530 }
531
532 static int
533 saa711x_attach_adapter (struct i2c_adapter *adapter)
534 {
535         dprintk(1,
536                 KERN_INFO
537                 "saa711x.c: starting probe for adapter %s (0x%x)\n",
538                 I2C_NAME(adapter), adapter->id);
539         return i2c_probe(adapter, &addr_data, &saa711x_detect_client);
540 }
541
542 static int
543 saa711x_detach_client (struct i2c_client *client)
544 {
545         struct saa711x *decoder = i2c_get_clientdata(client);
546         int err;
547
548         err = i2c_detach_client(client);
549         if (err) {
550                 return err;
551         }
552
553         kfree(decoder);
554         kfree(client);
555
556         return 0;
557 }
558
559 /* ----------------------------------------------------------------------- */
560
561 static struct i2c_driver i2c_driver_saa711x = {
562         .driver = {
563                 .name = "saa711x",
564         },
565         .id = I2C_DRIVERID_SAA711X,
566         .attach_adapter = saa711x_attach_adapter,
567         .detach_client = saa711x_detach_client,
568         .command = saa711x_command,
569 };
570
571 static int __init
572 saa711x_init (void)
573 {
574         return i2c_add_driver(&i2c_driver_saa711x);
575 }
576
577 static void __exit
578 saa711x_exit (void)
579 {
580         i2c_del_driver(&i2c_driver_saa711x);
581 }
582
583 module_init(saa711x_init);
584 module_exit(saa711x_exit);