173bca1e02950cdd29d340e56474f1da30389fbb
[linux-2.6.git] / 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 #include <linux/i2c-dev.h>
53
54 #define I2C_NAME(s) (s)->name
55
56 #include <linux/video_encoder.h>
57
58 static int debug = 0;
59 module_param(debug, int, 0);
60 MODULE_PARM_DESC(debug, "Debug level (0-1)");
61
62 #define dprintk(num, format, args...) \
63         do { \
64                 if (debug >= num) \
65                         printk(format, ##args); \
66         } while (0)
67
68 /* ----------------------------------------------------------------------- */
69
70 struct adv7175 {
71         unsigned char reg[128];
72
73         int norm;
74         int input;
75         int enable;
76         int bright;
77         int contrast;
78         int hue;
79         int sat;
80 };
81
82 #define   I2C_ADV7175        0xd4
83 #define   I2C_ADV7176        0x54
84
85 static char adv7175_name[] = "adv7175";
86 static char adv7176_name[] = "adv7176";
87
88 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
89 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
90
91 /* ----------------------------------------------------------------------- */
92
93 static inline int
94 adv7175_write (struct i2c_client *client,
95                u8                 reg,
96                u8                 value)
97 {
98         struct adv7175 *encoder = i2c_get_clientdata(client);
99
100         encoder->reg[reg] = value;
101         return i2c_smbus_write_byte_data(client, reg, value);
102 }
103
104 static inline int
105 adv7175_read (struct i2c_client *client,
106               u8                 reg)
107 {
108         return i2c_smbus_read_byte_data(client, reg);
109 }
110
111 static int
112 adv7175_write_block (struct i2c_client *client,
113                      const u8          *data,
114                      unsigned int       len)
115 {
116         int ret = -1;
117         u8 reg;
118
119         /* the adv7175 has an autoincrement function, use it if
120          * the adapter understands raw I2C */
121         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
122                 /* do raw I2C, not smbus compatible */
123                 struct adv7175 *encoder = i2c_get_clientdata(client);
124                 struct i2c_msg msg;
125                 u8 block_data[32];
126
127                 msg.addr = client->addr;
128                 msg.flags = 0;
129                 while (len >= 2) {
130                         msg.buf = (char *) block_data;
131                         msg.len = 0;
132                         block_data[msg.len++] = reg = data[0];
133                         do {
134                                 block_data[msg.len++] =
135                                     encoder->reg[reg++] = data[1];
136                                 len -= 2;
137                                 data += 2;
138                         } while (len >= 2 && data[0] == reg &&
139                                  msg.len < 32);
140                         if ((ret = i2c_transfer(client->adapter,
141                                                 &msg, 1)) < 0)
142                                 break;
143                 }
144         } else {
145                 /* do some slow I2C emulation kind of thing */
146                 while (len >= 2) {
147                         reg = *data++;
148                         if ((ret = adv7175_write(client, reg,
149                                                  *data++)) < 0)
150                                 break;
151                         len -= 2;
152                 }
153         }
154
155         return ret;
156 }
157
158 static void
159 set_subcarrier_freq (struct i2c_client *client,
160                      int                pass_through)
161 {
162         /* for some reason pass_through NTSC needs
163          * a different sub-carrier freq to remain stable. */
164         if(pass_through)
165                 adv7175_write(client, 0x02, 0x00);
166         else
167                 adv7175_write(client, 0x02, 0x55);
168
169         adv7175_write(client, 0x03, 0x55);
170         adv7175_write(client, 0x04, 0x55);
171         adv7175_write(client, 0x05, 0x25);
172 }
173
174 #ifdef ENCODER_DUMP
175 static void
176 dump (struct i2c_client *client)
177 {
178         struct adv7175 *encoder = i2c_get_clientdata(client);
179         int i, j;
180
181         printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
182         for (i = 0; i < 182 / 8; i++) {
183                 printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
184                 for (j = 0; j < 8; j++) {
185                         printk(" 0x%02x", encoder->reg[i * 8 + j]);
186                 }
187                 printk("\n");
188         }
189 }
190 #endif
191
192 /* ----------------------------------------------------------------------- */
193 // Output filter:  S-Video  Composite
194
195 #define MR050       0x11        //0x09
196 #define MR060       0x14        //0x0c
197
198 //---------------------------------------------------------------------------
199
200 #define TR0MODE     0x46
201 #define TR0RST      0x80
202
203 #define TR1CAPT     0x80
204 #define TR1PLAY     0x00
205
206 static const unsigned char init_common[] = {
207
208         0x00, MR050,            /* MR0, PAL enabled */
209         0x01, 0x00,             /* MR1 */
210         0x02, 0x0c,             /* subc. freq. */
211         0x03, 0x8c,             /* subc. freq. */
212         0x04, 0x79,             /* subc. freq. */
213         0x05, 0x26,             /* subc. freq. */
214         0x06, 0x40,             /* subc. phase */
215
216         0x07, TR0MODE,          /* TR0, 16bit */
217         0x08, 0x21,             /*  */
218         0x09, 0x00,             /*  */
219         0x0a, 0x00,             /*  */
220         0x0b, 0x00,             /*  */
221         0x0c, TR1CAPT,          /* TR1 */
222         0x0d, 0x4f,             /* MR2 */
223         0x0e, 0x00,             /*  */
224         0x0f, 0x00,             /*  */
225         0x10, 0x00,             /*  */
226         0x11, 0x00,             /*  */
227 };
228
229 static const unsigned char init_pal[] = {
230         0x00, MR050,            /* MR0, PAL enabled */
231         0x01, 0x00,             /* MR1 */
232         0x02, 0x0c,             /* subc. freq. */
233         0x03, 0x8c,             /* subc. freq. */
234         0x04, 0x79,             /* subc. freq. */
235         0x05, 0x26,             /* subc. freq. */
236         0x06, 0x40,             /* subc. phase */
237 };
238
239 static const unsigned char init_ntsc[] = {
240         0x00, MR060,            /* MR0, NTSC enabled */
241         0x01, 0x00,             /* MR1 */
242         0x02, 0x55,             /* subc. freq. */
243         0x03, 0x55,             /* subc. freq. */
244         0x04, 0x55,             /* subc. freq. */
245         0x05, 0x25,             /* subc. freq. */
246         0x06, 0x1a,             /* subc. phase */
247 };
248
249 static int
250 adv7175_command (struct i2c_client *client,
251                  unsigned int       cmd,
252                  void              *arg)
253 {
254         struct adv7175 *encoder = i2c_get_clientdata(client);
255
256         switch (cmd) {
257
258         case 0:
259                 /* This is just for testing!!! */
260                 adv7175_write_block(client, init_common,
261                                     sizeof(init_common));
262                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
263                 adv7175_write(client, 0x07, TR0MODE);
264                 break;
265
266         case ENCODER_GET_CAPABILITIES:
267         {
268                 struct video_encoder_capability *cap = arg;
269
270                 cap->flags = VIDEO_ENCODER_PAL |
271                              VIDEO_ENCODER_NTSC |
272                              VIDEO_ENCODER_SECAM; /* well, hacky */
273                 cap->inputs = 2;
274                 cap->outputs = 1;
275         }
276                 break;
277
278         case ENCODER_SET_NORM:
279         {
280                 int iarg = *(int *) arg;
281
282                 switch (iarg) {
283
284                 case VIDEO_MODE_NTSC:
285                         adv7175_write_block(client, init_ntsc,
286                                             sizeof(init_ntsc));
287                         if (encoder->input == 0)
288                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
289                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
290                         adv7175_write(client, 0x07, TR0MODE);
291                         break;
292
293                 case VIDEO_MODE_PAL:
294                         adv7175_write_block(client, init_pal,
295                                             sizeof(init_pal));
296                         if (encoder->input == 0)
297                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
298                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
299                         adv7175_write(client, 0x07, TR0MODE);
300                         break;
301
302                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
303                         /* This is an attempt to convert
304                          * SECAM->PAL (typically it does not work
305                          * due to genlock: when decoder is in SECAM
306                          * and encoder in in PAL the subcarrier can
307                          * not be syncronized with horizontal
308                          * quency) */
309                         adv7175_write_block(client, init_pal,
310                                             sizeof(init_pal));
311                         if (encoder->input == 0)
312                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
313                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
314                         adv7175_write(client, 0x07, TR0MODE);
315                         break;
316                 default:
317                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
318                                 I2C_NAME(client), iarg);
319                         return -EINVAL;
320
321                 }
322                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
323                         norms[iarg]);
324                 encoder->norm = iarg;
325         }
326                 break;
327
328         case ENCODER_SET_INPUT:
329         {
330                 int iarg = *(int *) arg;
331
332                 /* RJ: *iarg = 0: input is from SAA7110
333                  *iarg = 1: input is from ZR36060
334                  *iarg = 2: color bar */
335
336                 switch (iarg) {
337
338                 case 0:
339                         adv7175_write(client, 0x01, 0x00);
340
341                         if (encoder->norm == VIDEO_MODE_NTSC)
342                                 set_subcarrier_freq(client, 1);
343
344                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
345                         if (encoder->norm == VIDEO_MODE_SECAM)
346                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
347                         else
348                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
349                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
350                         adv7175_write(client, 0x07, TR0MODE);
351                         //udelay(10);
352                         break;
353
354                 case 1:
355                         adv7175_write(client, 0x01, 0x00);
356
357                         if (encoder->norm == VIDEO_MODE_NTSC)
358                                 set_subcarrier_freq(client, 0);
359
360                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
361                         adv7175_write(client, 0x0d, 0x49);
362                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
363                         adv7175_write(client, 0x07, TR0MODE);
364                         //udelay(10);
365                         break;
366
367                 case 2:
368                         adv7175_write(client, 0x01, 0x80);
369
370                         if (encoder->norm == VIDEO_MODE_NTSC)
371                                 set_subcarrier_freq(client, 0);
372
373                         adv7175_write(client, 0x0d, 0x49);
374                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
375                         adv7175_write(client, 0x07, TR0MODE);
376                         //udelay(10);
377                         break;
378
379                 default:
380                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
381                                 I2C_NAME(client), iarg);
382                         return -EINVAL;
383
384                 }
385                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
386                         inputs[iarg]);
387                 encoder->input = iarg;
388         }
389                 break;
390
391         case ENCODER_SET_OUTPUT:
392         {
393                 int *iarg = arg;
394
395                 /* not much choice of outputs */
396                 if (*iarg != 0) {
397                         return -EINVAL;
398                 }
399         }
400                 break;
401
402         case ENCODER_ENABLE_OUTPUT:
403         {
404                 int *iarg = arg;
405
406                 encoder->enable = !!*iarg;
407         }
408                 break;
409
410 #ifdef ENCODER_DUMP
411         case ENCODER_DUMP:
412         {
413                 dump(client);
414         }
415                 break;
416 #endif
417
418         default:
419                 return -EINVAL;
420         }
421
422         return 0;
423 }
424
425 /* ----------------------------------------------------------------------- */
426
427 /*
428  * Generic i2c probe
429  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
430  */
431 static unsigned short normal_i2c[] =
432     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
433         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
434         I2C_CLIENT_END
435 };
436
437 static unsigned short ignore = I2C_CLIENT_END;
438                                                                                 
439 static struct i2c_client_address_data addr_data = {
440         .normal_i2c             = normal_i2c,
441         .probe                  = &ignore,
442         .ignore                 = &ignore,
443 };
444
445 static struct i2c_driver i2c_driver_adv7175;
446
447 static int
448 adv7175_detect_client (struct i2c_adapter *adapter,
449                        int                 address,
450                        int                 kind)
451 {
452         int i;
453         struct i2c_client *client;
454         struct adv7175 *encoder;
455         char *dname;
456
457         dprintk(1,
458                 KERN_INFO
459                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
460                 address << 1);
461
462         /* Check if the adapter supports the needed features */
463         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
464                 return 0;
465
466         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
467         if (client == 0)
468                 return -ENOMEM;
469         memset(client, 0, sizeof(struct i2c_client));
470         client->addr = address;
471         client->adapter = adapter;
472         client->driver = &i2c_driver_adv7175;
473         client->flags = I2C_CLIENT_ALLOW_USE;
474         if ((client->addr == I2C_ADV7175 >> 1) ||
475             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
476                 dname = adv7175_name;
477         } else if ((client->addr == I2C_ADV7176 >> 1) ||
478                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
479                 dname = adv7176_name;
480         } else {
481                 /* We should never get here!!! */
482                 kfree(client);
483                 return 0;
484         }
485         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
486
487         encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
488         if (encoder == NULL) {
489                 kfree(client);
490                 return -ENOMEM;
491         }
492         memset(encoder, 0, sizeof(struct adv7175));
493         encoder->norm = VIDEO_MODE_PAL;
494         encoder->input = 0;
495         encoder->enable = 1;
496         i2c_set_clientdata(client, encoder);
497
498         i = i2c_attach_client(client);
499         if (i) {
500                 kfree(client);
501                 kfree(encoder);
502                 return i;
503         }
504
505         i = adv7175_write_block(client, init_common, sizeof(init_common));
506         if (i >= 0) {
507                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
508                 i = adv7175_write(client, 0x07, TR0MODE);
509                 i = adv7175_read(client, 0x12);
510                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
511                         I2C_NAME(client), i & 1, client->addr << 1);
512         }
513         if (i < 0) {
514                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
515                         I2C_NAME(client), i);
516         }
517
518         return 0;
519 }
520
521 static int
522 adv7175_attach_adapter (struct i2c_adapter *adapter)
523 {
524         dprintk(1,
525                 KERN_INFO
526                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
527                 I2C_NAME(adapter), adapter->id);
528         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
529 }
530
531 static int
532 adv7175_detach_client (struct i2c_client *client)
533 {
534         struct adv7175 *encoder = i2c_get_clientdata(client);
535         int err;
536
537         err = i2c_detach_client(client);
538         if (err) {
539                 return err;
540         }
541
542         kfree(encoder);
543         kfree(client);
544
545         return 0;
546 }
547
548 /* ----------------------------------------------------------------------- */
549
550 static struct i2c_driver i2c_driver_adv7175 = {
551         .owner = THIS_MODULE,
552         .name = "adv7175",      /* name */
553
554         .id = I2C_DRIVERID_ADV7175,
555         .flags = I2C_DF_NOTIFY,
556
557         .attach_adapter = adv7175_attach_adapter,
558         .detach_client = adv7175_detach_client,
559         .command = adv7175_command,
560 };
561
562 static int __init
563 adv7175_init (void)
564 {
565         return i2c_add_driver(&i2c_driver_adv7175);
566 }
567
568 static void __exit
569 adv7175_exit (void)
570 {
571         i2c_del_driver(&i2c_driver_adv7175);
572 }
573
574 module_init(adv7175_init);
575 module_exit(adv7175_exit);