Merge master.kernel.org:/home/rmk/linux-2.6-arm
[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 <asm/segment.h>
43 #include <linux/types.h>
44
45 #include <linux/videodev.h>
46 #include <asm/uaccess.h>
47
48 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
49 MODULE_AUTHOR("Dave Perks");
50 MODULE_LICENSE("GPL");
51
52 #include <linux/i2c.h>
53 #include <linux/i2c-dev.h>
54
55 #define I2C_NAME(s) (s)->name
56
57 #include <linux/video_encoder.h>
58
59 static int debug = 0;
60 module_param(debug, int, 0);
61 MODULE_PARM_DESC(debug, "Debug level (0-1)");
62
63 #define dprintk(num, format, args...) \
64         do { \
65                 if (debug >= num) \
66                         printk(format, ##args); \
67         } while (0)
68
69 /* ----------------------------------------------------------------------- */
70
71 struct adv7175 {
72         unsigned char reg[128];
73
74         int norm;
75         int input;
76         int enable;
77         int bright;
78         int contrast;
79         int hue;
80         int sat;
81 };
82
83 #define   I2C_ADV7175        0xd4
84 #define   I2C_ADV7176        0x54
85
86 static char adv7175_name[] = "adv7175";
87 static char adv7176_name[] = "adv7176";
88
89 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
90 static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
91
92 /* ----------------------------------------------------------------------- */
93
94 static inline int
95 adv7175_write (struct i2c_client *client,
96                u8                 reg,
97                u8                 value)
98 {
99         struct adv7175 *encoder = i2c_get_clientdata(client);
100
101         encoder->reg[reg] = value;
102         return i2c_smbus_write_byte_data(client, reg, value);
103 }
104
105 static inline int
106 adv7175_read (struct i2c_client *client,
107               u8                 reg)
108 {
109         return i2c_smbus_read_byte_data(client, reg);
110 }
111
112 static int
113 adv7175_write_block (struct i2c_client *client,
114                      const u8          *data,
115                      unsigned int       len)
116 {
117         int ret = -1;
118         u8 reg;
119
120         /* the adv7175 has an autoincrement function, use it if
121          * the adapter understands raw I2C */
122         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
123                 /* do raw I2C, not smbus compatible */
124                 struct adv7175 *encoder = i2c_get_clientdata(client);
125                 struct i2c_msg msg;
126                 u8 block_data[32];
127
128                 msg.addr = client->addr;
129                 msg.flags = 0;
130                 while (len >= 2) {
131                         msg.buf = (char *) block_data;
132                         msg.len = 0;
133                         block_data[msg.len++] = reg = data[0];
134                         do {
135                                 block_data[msg.len++] =
136                                     encoder->reg[reg++] = data[1];
137                                 len -= 2;
138                                 data += 2;
139                         } while (len >= 2 && data[0] == reg &&
140                                  msg.len < 32);
141                         if ((ret = i2c_transfer(client->adapter,
142                                                 &msg, 1)) < 0)
143                                 break;
144                 }
145         } else {
146                 /* do some slow I2C emulation kind of thing */
147                 while (len >= 2) {
148                         reg = *data++;
149                         if ((ret = adv7175_write(client, reg,
150                                                  *data++)) < 0)
151                                 break;
152                         len -= 2;
153                 }
154         }
155
156         return ret;
157 }
158
159 static void
160 set_subcarrier_freq (struct i2c_client *client,
161                      int                pass_through)
162 {
163         /* for some reason pass_through NTSC needs
164          * a different sub-carrier freq to remain stable. */
165         if(pass_through)
166                 adv7175_write(client, 0x02, 0x00);
167         else
168                 adv7175_write(client, 0x02, 0x55);
169
170         adv7175_write(client, 0x03, 0x55);
171         adv7175_write(client, 0x04, 0x55);
172         adv7175_write(client, 0x05, 0x25);
173 }
174
175 #ifdef ENCODER_DUMP
176 static void
177 dump (struct i2c_client *client)
178 {
179         struct adv7175 *encoder = i2c_get_clientdata(client);
180         int i, j;
181
182         printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
183         for (i = 0; i < 182 / 8; i++) {
184                 printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
185                 for (j = 0; j < 8; j++) {
186                         printk(" 0x%02x", encoder->reg[i * 8 + j]);
187                 }
188                 printk("\n");
189         }
190 }
191 #endif
192
193 /* ----------------------------------------------------------------------- */
194 // Output filter:  S-Video  Composite
195
196 #define MR050       0x11        //0x09
197 #define MR060       0x14        //0x0c
198
199 //---------------------------------------------------------------------------
200
201 #define TR0MODE     0x46
202 #define TR0RST      0x80
203
204 #define TR1CAPT     0x80
205 #define TR1PLAY     0x00
206
207 static const unsigned char init_common[] = {
208
209         0x00, MR050,            /* MR0, PAL enabled */
210         0x01, 0x00,             /* MR1 */
211         0x02, 0x0c,             /* subc. freq. */
212         0x03, 0x8c,             /* subc. freq. */
213         0x04, 0x79,             /* subc. freq. */
214         0x05, 0x26,             /* subc. freq. */
215         0x06, 0x40,             /* subc. phase */
216
217         0x07, TR0MODE,          /* TR0, 16bit */
218         0x08, 0x21,             /*  */
219         0x09, 0x00,             /*  */
220         0x0a, 0x00,             /*  */
221         0x0b, 0x00,             /*  */
222         0x0c, TR1CAPT,          /* TR1 */
223         0x0d, 0x4f,             /* MR2 */
224         0x0e, 0x00,             /*  */
225         0x0f, 0x00,             /*  */
226         0x10, 0x00,             /*  */
227         0x11, 0x00,             /*  */
228 };
229
230 static const unsigned char init_pal[] = {
231         0x00, MR050,            /* MR0, PAL enabled */
232         0x01, 0x00,             /* MR1 */
233         0x02, 0x0c,             /* subc. freq. */
234         0x03, 0x8c,             /* subc. freq. */
235         0x04, 0x79,             /* subc. freq. */
236         0x05, 0x26,             /* subc. freq. */
237         0x06, 0x40,             /* subc. phase */
238 };
239
240 static const unsigned char init_ntsc[] = {
241         0x00, MR060,            /* MR0, NTSC enabled */
242         0x01, 0x00,             /* MR1 */
243         0x02, 0x55,             /* subc. freq. */
244         0x03, 0x55,             /* subc. freq. */
245         0x04, 0x55,             /* subc. freq. */
246         0x05, 0x25,             /* subc. freq. */
247         0x06, 0x1a,             /* subc. phase */
248 };
249
250 static int
251 adv7175_command (struct i2c_client *client,
252                  unsigned int       cmd,
253                  void              *arg)
254 {
255         struct adv7175 *encoder = i2c_get_clientdata(client);
256
257         switch (cmd) {
258
259         case 0:
260                 /* This is just for testing!!! */
261                 adv7175_write_block(client, init_common,
262                                     sizeof(init_common));
263                 adv7175_write(client, 0x07, TR0MODE | TR0RST);
264                 adv7175_write(client, 0x07, TR0MODE);
265                 break;
266
267         case ENCODER_GET_CAPABILITIES:
268         {
269                 struct video_encoder_capability *cap = arg;
270
271                 cap->flags = VIDEO_ENCODER_PAL |
272                              VIDEO_ENCODER_NTSC |
273                              VIDEO_ENCODER_SECAM; /* well, hacky */
274                 cap->inputs = 2;
275                 cap->outputs = 1;
276         }
277                 break;
278
279         case ENCODER_SET_NORM:
280         {
281                 int iarg = *(int *) arg;
282
283                 switch (iarg) {
284
285                 case VIDEO_MODE_NTSC:
286                         adv7175_write_block(client, init_ntsc,
287                                             sizeof(init_ntsc));
288                         if (encoder->input == 0)
289                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
290                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
291                         adv7175_write(client, 0x07, TR0MODE);
292                         break;
293
294                 case VIDEO_MODE_PAL:
295                         adv7175_write_block(client, init_pal,
296                                             sizeof(init_pal));
297                         if (encoder->input == 0)
298                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
299                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
300                         adv7175_write(client, 0x07, TR0MODE);
301                         break;
302
303                 case VIDEO_MODE_SECAM:  // WARNING! ADV7176 does not support SECAM.
304                         /* This is an attempt to convert
305                          * SECAM->PAL (typically it does not work
306                          * due to genlock: when decoder is in SECAM
307                          * and encoder in in PAL the subcarrier can
308                          * not be syncronized with horizontal
309                          * quency) */
310                         adv7175_write_block(client, init_pal,
311                                             sizeof(init_pal));
312                         if (encoder->input == 0)
313                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
314                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
315                         adv7175_write(client, 0x07, TR0MODE);
316                         break;
317                 default:
318                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
319                                 I2C_NAME(client), iarg);
320                         return -EINVAL;
321
322                 }
323                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
324                         norms[iarg]);
325                 encoder->norm = iarg;
326         }
327                 break;
328
329         case ENCODER_SET_INPUT:
330         {
331                 int iarg = *(int *) arg;
332
333                 /* RJ: *iarg = 0: input is from SAA7110
334                  *iarg = 1: input is from ZR36060
335                  *iarg = 2: color bar */
336
337                 switch (iarg) {
338
339                 case 0:
340                         adv7175_write(client, 0x01, 0x00);
341
342                         if (encoder->norm == VIDEO_MODE_NTSC)
343                                 set_subcarrier_freq(client, 1);
344
345                         adv7175_write(client, 0x0c, TR1CAPT);   /* TR1 */
346                         if (encoder->norm == VIDEO_MODE_SECAM)
347                                 adv7175_write(client, 0x0d, 0x49);      // Disable genlock
348                         else
349                                 adv7175_write(client, 0x0d, 0x4f);      // Enable genlock
350                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
351                         adv7175_write(client, 0x07, TR0MODE);
352                         //udelay(10);
353                         break;
354
355                 case 1:
356                         adv7175_write(client, 0x01, 0x00);
357
358                         if (encoder->norm == VIDEO_MODE_NTSC)
359                                 set_subcarrier_freq(client, 0);
360
361                         adv7175_write(client, 0x0c, TR1PLAY);   /* TR1 */
362                         adv7175_write(client, 0x0d, 0x49);
363                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
364                         adv7175_write(client, 0x07, TR0MODE);
365                         //udelay(10);
366                         break;
367
368                 case 2:
369                         adv7175_write(client, 0x01, 0x80);
370
371                         if (encoder->norm == VIDEO_MODE_NTSC)
372                                 set_subcarrier_freq(client, 0);
373
374                         adv7175_write(client, 0x0d, 0x49);
375                         adv7175_write(client, 0x07, TR0MODE | TR0RST);
376                         adv7175_write(client, 0x07, TR0MODE);
377                         //udelay(10);
378                         break;
379
380                 default:
381                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
382                                 I2C_NAME(client), iarg);
383                         return -EINVAL;
384
385                 }
386                 dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
387                         inputs[iarg]);
388                 encoder->input = iarg;
389         }
390                 break;
391
392         case ENCODER_SET_OUTPUT:
393         {
394                 int *iarg = arg;
395
396                 /* not much choice of outputs */
397                 if (*iarg != 0) {
398                         return -EINVAL;
399                 }
400         }
401                 break;
402
403         case ENCODER_ENABLE_OUTPUT:
404         {
405                 int *iarg = arg;
406
407                 encoder->enable = !!*iarg;
408         }
409                 break;
410
411 #ifdef ENCODER_DUMP
412         case ENCODER_DUMP:
413         {
414                 dump(client);
415         }
416                 break;
417 #endif
418
419         default:
420                 return -EINVAL;
421         }
422
423         return 0;
424 }
425
426 /* ----------------------------------------------------------------------- */
427
428 /*
429  * Generic i2c probe
430  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
431  */
432 static unsigned short normal_i2c[] =
433     { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
434         I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
435         I2C_CLIENT_END
436 };
437
438 static unsigned short ignore = I2C_CLIENT_END;
439                                                                                 
440 static struct i2c_client_address_data addr_data = {
441         .normal_i2c             = normal_i2c,
442         .probe                  = &ignore,
443         .ignore                 = &ignore,
444         .force                  = &ignore,
445 };
446
447 static struct i2c_driver i2c_driver_adv7175;
448
449 static int
450 adv7175_detect_client (struct i2c_adapter *adapter,
451                        int                 address,
452                        int                 kind)
453 {
454         int i;
455         struct i2c_client *client;
456         struct adv7175 *encoder;
457         char *dname;
458
459         dprintk(1,
460                 KERN_INFO
461                 "adv7175.c: detecting adv7175 client on address 0x%x\n",
462                 address << 1);
463
464         /* Check if the adapter supports the needed features */
465         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
466                 return 0;
467
468         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
469         if (client == 0)
470                 return -ENOMEM;
471         memset(client, 0, sizeof(struct i2c_client));
472         client->addr = address;
473         client->adapter = adapter;
474         client->driver = &i2c_driver_adv7175;
475         client->flags = I2C_CLIENT_ALLOW_USE;
476         if ((client->addr == I2C_ADV7175 >> 1) ||
477             (client->addr == (I2C_ADV7175 >> 1) + 1)) {
478                 dname = adv7175_name;
479         } else if ((client->addr == I2C_ADV7176 >> 1) ||
480                    (client->addr == (I2C_ADV7176 >> 1) + 1)) {
481                 dname = adv7176_name;
482         } else {
483                 /* We should never get here!!! */
484                 kfree(client);
485                 return 0;
486         }
487         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
488
489         encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
490         if (encoder == NULL) {
491                 kfree(client);
492                 return -ENOMEM;
493         }
494         memset(encoder, 0, sizeof(struct adv7175));
495         encoder->norm = VIDEO_MODE_PAL;
496         encoder->input = 0;
497         encoder->enable = 1;
498         i2c_set_clientdata(client, encoder);
499
500         i = i2c_attach_client(client);
501         if (i) {
502                 kfree(client);
503                 kfree(encoder);
504                 return i;
505         }
506
507         i = adv7175_write_block(client, init_common, sizeof(init_common));
508         if (i >= 0) {
509                 i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
510                 i = adv7175_write(client, 0x07, TR0MODE);
511                 i = adv7175_read(client, 0x12);
512                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
513                         I2C_NAME(client), i & 1, client->addr << 1);
514         }
515         if (i < 0) {
516                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
517                         I2C_NAME(client), i);
518         }
519
520         return 0;
521 }
522
523 static int
524 adv7175_attach_adapter (struct i2c_adapter *adapter)
525 {
526         dprintk(1,
527                 KERN_INFO
528                 "adv7175.c: starting probe for adapter %s (0x%x)\n",
529                 I2C_NAME(adapter), adapter->id);
530         return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
531 }
532
533 static int
534 adv7175_detach_client (struct i2c_client *client)
535 {
536         struct adv7175 *encoder = i2c_get_clientdata(client);
537         int err;
538
539         err = i2c_detach_client(client);
540         if (err) {
541                 return err;
542         }
543
544         kfree(encoder);
545         kfree(client);
546
547         return 0;
548 }
549
550 /* ----------------------------------------------------------------------- */
551
552 static struct i2c_driver i2c_driver_adv7175 = {
553         .owner = THIS_MODULE,
554         .name = "adv7175",      /* name */
555
556         .id = I2C_DRIVERID_ADV7175,
557         .flags = I2C_DF_NOTIFY,
558
559         .attach_adapter = adv7175_attach_adapter,
560         .detach_client = adv7175_detach_client,
561         .command = adv7175_command,
562 };
563
564 static int __init
565 adv7175_init (void)
566 {
567         return i2c_add_driver(&i2c_driver_adv7175);
568 }
569
570 static void __exit
571 adv7175_exit (void)
572 {
573         i2c_del_driver(&i2c_driver_adv7175);
574 }
575
576 module_init(adv7175_init);
577 module_exit(adv7175_exit);