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