Merge branch 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block
[linux-2.6] / drivers / media / video / adv7175.c
1 /*
2  *  adv7175 - adv7175a video encoder driver version 0.0.3
3  *
4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
6  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
7  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
8  *
9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/delay.h>
30 #include <linux/errno.h>
31 #include <linux/fs.h>
32 #include <linux/kernel.h>
33 #include <linux/major.h>
34 #include <linux/slab.h>
35 #include <linux/mm.h>
36 #include <linux/pci.h>
37 #include <linux/signal.h>
38 #include <asm/io.h>
39 #include <asm/pgtable.h>
40 #include <asm/page.h>
41 #include <linux/sched.h>
42 #include <linux/types.h>
43
44 #include <linux/videodev.h>
45 #include <asm/uaccess.h>
46
47 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
48 MODULE_AUTHOR("Dave Perks");
49 MODULE_LICENSE("GPL");
50
51 #include <linux/i2c.h>
52
53 #define I2C_NAME(s) (s)->name
54
55 #include <linux/video_encoder.h>
56
57 static int debug = 0;
58 module_param(debug, int, 0);
59 MODULE_PARM_DESC(debug, "Debug level (0-1)");
60
61 #define dprintk(num, format, args...) \
62         do { \
63                 if (debug >= num) \
64                         printk(format, ##args); \
65         } while (0)
66
67 /* ----------------------------------------------------------------------- */
68
69 struct adv7175 {
70         int norm;
71         int input;
72         int enable;
73         int bright;
74         int contrast;
75         int hue;
76         int sat;
77 };
78
79 #define   I2C_ADV7175        0xd4
80 #define   I2C_ADV7176        0x54
81
82 static char adv7175_name[] = "adv7175";
83 static char adv7176_name[] = "adv7176";
84
85 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
86 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
87
88 /* ----------------------------------------------------------------------- */
89
90 static inline int
91 adv7175_write (struct i2c_client *client,
92                u8                 reg,
93                u8                 value)
94 {
95         return i2c_smbus_write_byte_data(client, reg, value);
96 }
97
98 static inline int
99 adv7175_read (struct i2c_client *client,
100               u8                 reg)
101 {
102         return i2c_smbus_read_byte_data(client, reg);
103 }
104
105 static int
106 adv7175_write_block (struct i2c_client *client,
107                      const u8          *data,
108                      unsigned int       len)
109 {
110         int ret = -1;
111         u8 reg;
112
113         /* the adv7175 has an autoincrement function, use it if
114          * the adapter understands raw I2C */
115         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
116                 /* do raw I2C, not smbus compatible */
117                 u8 block_data[32];
118                 int block_len;
119
120                 while (len >= 2) {
121                         block_len = 0;
122                         block_data[block_len++] = reg = data[0];
123                         do {
124                                 block_data[block_len++] = data[1];
125                                 reg++;
126                                 len -= 2;
127                                 data += 2;
128                         } while (len >= 2 && data[0] == reg &&
129                                  block_len < 32);
130                         if ((ret = i2c_master_send(client, block_data,
131                                                    block_len)) < 0)
132                                 break;
133                 }
134         } else {
135                 /* do some slow I2C emulation kind of thing */
136                 while (len >= 2) {
137                         reg = *data++;
138                         if ((ret = adv7175_write(client, reg,
139                                                  *data++)) < 0)
140                                 break;
141                         len -= 2;
142                 }
143         }
144
145         return ret;
146 }
147
148 static void
149 set_subcarrier_freq (struct i2c_client *client,
150                      int                pass_through)
151 {
152         /* for some reason pass_through NTSC needs
153          * a different sub-carrier freq to remain stable. */
154         if(pass_through)
155                 adv7175_write(client, 0x02, 0x00);
156         else
157                 adv7175_write(client, 0x02, 0x55);
158
159         adv7175_write(client, 0x03, 0x55);
160         adv7175_write(client, 0x04, 0x55);
161         adv7175_write(client, 0x05, 0x25);
162 }
163
164 /* ----------------------------------------------------------------------- */
165 // Output filter:  S-Video  Composite
166
167 #define MR050       0x11        //0x09
168 #define MR060       0x14        //0x0c
169
170 //---------------------------------------------------------------------------
171
172 #define TR0MODE     0x46
173 #define TR0RST      0x80
174
175 #define TR1CAPT     0x80
176 #define TR1PLAY     0x00
177
178 static const unsigned char init_common[] = {
179
180         0x00, MR050,            /* MR0, PAL enabled */
181         0x01, 0x00,             /* MR1 */
182         0x02, 0x0c,             /* subc. freq. */
183         0x03, 0x8c,             /* subc. freq. */
184         0x04, 0x79,             /* subc. freq. */
185         0x05, 0x26,             /* subc. freq. */
186         0x06, 0x40,             /* subc. phase */
187
188         0x07, TR0MODE,          /* TR0, 16bit */
189         0x08, 0x21,             /*  */
190         0x09, 0x00,             /*  */
191         0x0a, 0x00,             /*  */
192         0x0b, 0x00,             /*  */
193         0x0c, TR1CAPT,          /* TR1 */
194         0x0d, 0x4f,             /* MR2 */
195         0x0e, 0x00,             /*  */
196         0x0f, 0x00,             /*  */
197         0x10, 0x00,             /*  */
198         0x11, 0x00,             /*  */
199 };
200
201 static const unsigned char init_pal[] = {
202         0x00, MR050,            /* MR0, PAL enabled */
203         0x01, 0x00,             /* MR1 */
204         0x02, 0x0c,             /* subc. freq. */
205         0x03, 0x8c,             /* subc. freq. */
206         0x04, 0x79,             /* subc. freq. */
207         0x05, 0x26,             /* subc. freq. */
208         0x06, 0x40,             /* subc. phase */
209 };
210
211 static const unsigned char init_ntsc[] = {
212         0x00, MR060,            /* MR0, NTSC enabled */
213         0x01, 0x00,             /* MR1 */
214         0x02, 0x55,             /* subc. freq. */
215         0x03, 0x55,             /* subc. freq. */
216         0x04, 0x55,             /* subc. freq. */
217         0x05, 0x25,             /* subc. freq. */
218         0x06, 0x1a,             /* subc. phase */
219 };
220
221 static int
222 adv7175_command (struct i2c_client *client,
223                  unsigned int       cmd,
224                  void              *arg)
225 {
226         struct adv7175 *encoder = i2c_get_clientdata(client);
227
228         switch (cmd) {
229
230         case 0:
231                 /* This is just for testing!!! */
232                 adv7175_write_block(client, init_common,
233                                     sizeof(init_common));
234                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
235                 adv7175_write(client, 0x07, TR0MODE);
236                 break;
237
238         case ENCODER_GET_CAPABILITIES:
239         {
240                 struct video_encoder_capability *cap = arg;
241
242                 cap->flags = VIDEO_ENCODER_PAL |
243                              VIDEO_ENCODER_NTSC |
244                              VIDEO_ENCODER_SECAM; /* well, hacky */
245                 cap->inputs = 2;
246                 cap->outputs = 1;
247         }
248                 break;
249
250         case ENCODER_SET_NORM:
251         {
252                 int iarg = *(int *) arg;
253
254                 switch (iarg) {
255
256                 case VIDEO_MODE_NTSC:
257                         adv7175_write_block(client, init_ntsc,
258                                             sizeof(init_ntsc));
259                         if (encoder->input == 0)
260                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
261                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
262                         adv7175_write(client, 0x07, TR0MODE);
263                         break;
264
265                 case VIDEO_MODE_PAL:
266                         adv7175_write_block(client, init_pal,
267                                             sizeof(init_pal));
268                         if (encoder->input == 0)
269                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
270                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
271                         adv7175_write(client, 0x07, TR0MODE);
272                         break;
273
274                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
275                         /* This is an attempt to convert
276                          * SECAM->PAL (typically it does not work
277                          * due to genlock: when decoder is in SECAM
278                          * and encoder in in PAL the subcarrier can
279                          * not be syncronized with horizontal
280                          * quency) */
281                         adv7175_write_block(client, init_pal,
282                                             sizeof(init_pal));
283                         if (encoder->input == 0)
284                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
285                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
286                         adv7175_write(client, 0x07, TR0MODE);
287                         break;
288                 default:
289                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
290                                 I2C_NAME(client), iarg);
291                         return -EINVAL;
292
293                 }
294                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
295                         norms[iarg]);
296                 encoder->norm = iarg;
297         }
298                 break;
299
300         case ENCODER_SET_INPUT:
301         {
302                 int iarg = *(int *) arg;
303
304                 /* RJ: *iarg = 0: input is from SAA7110
305                  *iarg = 1: input is from ZR36060
306                  *iarg = 2: color bar */
307
308                 switch (iarg) {
309
310                 case 0:
311                         adv7175_write(client, 0x01, 0x00);
312
313                         if (encoder->norm == VIDEO_MODE_NTSC)
314                                 set_subcarrier_freq(client, 1);
315
316                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
317                         if (encoder->norm == VIDEO_MODE_SECAM)
318                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
319                         else
320                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
321                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
322                         adv7175_write(client, 0x07, TR0MODE);
323                         //udelay(10);
324                         break;
325
326                 case 1:
327                         adv7175_write(client, 0x01, 0x00);
328
329                         if (encoder->norm == VIDEO_MODE_NTSC)
330                                 set_subcarrier_freq(client, 0);
331
332                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
333                         adv7175_write(client, 0x0d, 0x49);
334                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
335                         adv7175_write(client, 0x07, TR0MODE);
336                         //udelay(10);
337                         break;
338
339                 case 2:
340                         adv7175_write(client, 0x01, 0x80);
341
342                         if (encoder->norm == VIDEO_MODE_NTSC)
343                                 set_subcarrier_freq(client, 0);
344
345                         adv7175_write(client, 0x0d, 0x49);
346                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
347                         adv7175_write(client, 0x07, TR0MODE);
348                         //udelay(10);
349                         break;
350
351                 default:
352                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
353                                 I2C_NAME(client), iarg);
354                         return -EINVAL;
355
356                 }
357                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
358                         inputs[iarg]);
359                 encoder->input = iarg;
360         }
361                 break;
362
363         case ENCODER_SET_OUTPUT:
364         {
365                 int *iarg = arg;
366
367                 /* not much choice of outputs */
368                 if (*iarg != 0) {
369                         return -EINVAL;
370                 }
371         }
372                 break;
373
374         case ENCODER_ENABLE_OUTPUT:
375         {
376                 int *iarg = arg;
377
378                 encoder->enable = !!*iarg;
379         }
380                 break;
381
382         default:
383                 return -EINVAL;
384         }
385
386         return 0;
387 }
388
389 /* ----------------------------------------------------------------------- */
390
391 /*
392  * Generic i2c probe
393  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
394  */
395 static unsigned short normal_i2c[] =
396     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
397         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
398         I2C_CLIENT_END
399 };
400
401 static unsigned short ignore = I2C_CLIENT_END;
402
403 static struct i2c_client_address_data addr_data = {
404         .normal_i2c             = normal_i2c,
405         .probe                  = &ignore,
406         .ignore                 = &ignore,
407 };
408
409 static struct i2c_driver i2c_driver_adv7175;
410
411 static int
412 adv7175_detect_client (struct i2c_adapter *adapter,
413                        int                 address,
414                        int                 kind)
415 {
416         int i;
417         struct i2c_client *client;
418         struct adv7175 *encoder;
419         char *dname;
420
421         dprintk(1,
422                 KERN_INFO
423                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
424                 address << 1);
425
426         /* Check if the adapter supports the needed features */
427         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
428                 return 0;
429
430         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
431         if (client == 0)
432                 return -ENOMEM;
433         client->addr = address;
434         client->adapter = adapter;
435         client->driver = &i2c_driver_adv7175;
436         if ((client->addr == I2C_ADV7175 >> 1) ||
437             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
438                 dname = adv7175_name;
439         } else if ((client->addr == I2C_ADV7176 >> 1) ||
440                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
441                 dname = adv7176_name;
442         } else {
443                 /* We should never get here!!! */
444                 kfree(client);
445                 return 0;
446         }
447         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
448
449         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
450         if (encoder == NULL) {
451                 kfree(client);
452                 return -ENOMEM;
453         }
454         encoder->norm = VIDEO_MODE_PAL;
455         encoder->input = 0;
456         encoder->enable = 1;
457         i2c_set_clientdata(client, encoder);
458
459         i = i2c_attach_client(client);
460         if (i) {
461                 kfree(client);
462                 kfree(encoder);
463                 return i;
464         }
465
466         i = adv7175_write_block(client, init_common, sizeof(init_common));
467         if (i >= 0) {
468                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
469                 i = adv7175_write(client, 0x07, TR0MODE);
470                 i = adv7175_read(client, 0x12);
471                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
472                         I2C_NAME(client), i & 1, client->addr << 1);
473         }
474         if (i < 0) {
475                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
476                         I2C_NAME(client), i);
477         }
478
479         return 0;
480 }
481
482 static int
483 adv7175_attach_adapter (struct i2c_adapter *adapter)
484 {
485         dprintk(1,
486                 KERN_INFO
487                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
488                 I2C_NAME(adapter), adapter->id);
489         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
490 }
491
492 static int
493 adv7175_detach_client (struct i2c_client *client)
494 {
495         struct adv7175 *encoder = i2c_get_clientdata(client);
496         int err;
497
498         err = i2c_detach_client(client);
499         if (err) {
500                 return err;
501         }
502
503         kfree(encoder);
504         kfree(client);
505
506         return 0;
507 }
508
509 /* ----------------------------------------------------------------------- */
510
511 static struct i2c_driver i2c_driver_adv7175 = {
512         .driver = {
513                 .name = "adv7175",      /* name */
514         },
515
516         .id = I2C_DRIVERID_ADV7175,
517
518         .attach_adapter = adv7175_attach_adapter,
519         .detach_client = adv7175_detach_client,
520         .command = adv7175_command,
521 };
522
523 static int __init
524 adv7175_init (void)
525 {
526         return i2c_add_driver(&i2c_driver_adv7175);
527 }
528
529 static void __exit
530 adv7175_exit (void)
531 {
532         i2c_del_driver(&i2c_driver_adv7175);
533 }
534
535 module_init(adv7175_init);
536 module_exit(adv7175_exit);