Merge HEAD from gregkh@master.kernel.org:/pub/scm/linux/kernel/git/gregkh/i2c-2.6.git
[linux-2.6] / drivers / media / video / saa7185.c
1 /* 
2  * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
3  *
4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5  *
6  * Slight changes for video timing and attachment output by
7  * Wolfgang Scherr <scherr@net4you.net>
8  *
9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
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("Philips SAA7185 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 saa7185 {
72         unsigned char reg[128];
73
74         int norm;
75         int enable;
76         int bright;
77         int contrast;
78         int hue;
79         int sat;
80 };
81
82 #define   I2C_SAA7185        0x88
83
84 /* ----------------------------------------------------------------------- */
85
86 static inline int
87 saa7185_read (struct i2c_client *client)
88 {
89         return i2c_smbus_read_byte(client);
90 }
91
92 static int
93 saa7185_write (struct i2c_client *client,
94                u8                 reg,
95                u8                 value)
96 {
97         struct saa7185 *encoder = i2c_get_clientdata(client);
98
99         dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
100         encoder->reg[reg] = value;
101         return i2c_smbus_write_byte_data(client, reg, value);
102 }
103
104 static int
105 saa7185_write_block (struct i2c_client *client,
106                      const u8          *data,
107                      unsigned int       len)
108 {
109         int ret = -1;
110         u8 reg;
111
112         /* the adv7175 has an autoincrement function, use it if
113          * the adapter understands raw I2C */
114         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
115                 /* do raw I2C, not smbus compatible */
116                 struct saa7185 *encoder = i2c_get_clientdata(client);
117                 struct i2c_msg msg;
118                 u8 block_data[32];
119
120                 msg.addr = client->addr;
121                 msg.flags = 0;
122                 while (len >= 2) {
123                         msg.buf = (char *) block_data;
124                         msg.len = 0;
125                         block_data[msg.len++] = reg = data[0];
126                         do {
127                                 block_data[msg.len++] =
128                                     encoder->reg[reg++] = data[1];
129                                 len -= 2;
130                                 data += 2;
131                         } while (len >= 2 && data[0] == reg &&
132                                  msg.len < 32);
133                         if ((ret = i2c_transfer(client->adapter,
134                                                 &msg, 1)) < 0)
135                                 break;
136                 }
137         } else {
138                 /* do some slow I2C emulation kind of thing */
139                 while (len >= 2) {
140                         reg = *data++;
141                         if ((ret = saa7185_write(client, reg,
142                                                  *data++)) < 0)
143                                 break;
144                         len -= 2;
145                 }
146         }
147
148         return ret;
149 }
150
151 /* ----------------------------------------------------------------------- */
152
153 static const unsigned char init_common[] = {
154         0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
155                                  * YUV2C=1, MY2C=1, MUV2C=1 */
156
157         0x42, 0x6b,             /* OVLY0=107 */
158         0x43, 0x00,             /* OVLU0=0     white */
159         0x44, 0x00,             /* OVLV0=0   */
160         0x45, 0x22,             /* OVLY1=34  */
161         0x46, 0xac,             /* OVLU1=172   yellow */
162         0x47, 0x0e,             /* OVLV1=14  */
163         0x48, 0x03,             /* OVLY2=3   */
164         0x49, 0x1d,             /* OVLU2=29    cyan */
165         0x4a, 0xac,             /* OVLV2=172 */
166         0x4b, 0xf0,             /* OVLY3=240 */
167         0x4c, 0xc8,             /* OVLU3=200   green */
168         0x4d, 0xb9,             /* OVLV3=185 */
169         0x4e, 0xd4,             /* OVLY4=212 */
170         0x4f, 0x38,             /* OVLU4=56    magenta */
171         0x50, 0x47,             /* OVLV4=71  */
172         0x51, 0xc1,             /* OVLY5=193 */
173         0x52, 0xe3,             /* OVLU5=227   red */
174         0x53, 0x54,             /* OVLV5=84  */
175         0x54, 0xa3,             /* OVLY6=163 */
176         0x55, 0x54,             /* OVLU6=84    blue */
177         0x56, 0xf2,             /* OVLV6=242 */
178         0x57, 0x90,             /* OVLY7=144 */
179         0x58, 0x00,             /* OVLU7=0     black */
180         0x59, 0x00,             /* OVLV7=0   */
181
182         0x5a, 0x00,             /* CHPS=0    */
183         0x5b, 0x76,             /* GAINU=118 */
184         0x5c, 0xa5,             /* GAINV=165 */
185         0x5d, 0x3c,             /* BLCKL=60  */
186         0x5e, 0x3a,             /* BLNNL=58  */
187         0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
188         0x60, 0x00,             /* NULL      */
189
190         /* 0x61 - 0x66 set according to norm */
191
192         0x67, 0x00,             /* 0 : caption 1st byte odd  field */
193         0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
194         0x69, 0x00,             /* 0 : caption 1st byte even field */
195         0x6a, 0x00,             /* 0 : caption 2nd byte even field */
196
197         0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
198         0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
199                                  * CBLF=0, ORCV2=0, PRCV2=0 */
200         0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
201
202         0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
203                                  * least for PAL */
204         0x6f, 0x00,             /* HTRIG upper bits */
205         0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
206
207         /* The following should not be needed */
208
209         0x71, 0x15,             /* BMRQ=0x115 */
210         0x72, 0x90,             /* EMRQ=0x690 */
211         0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
212         0x74, 0x00,             /* NULL       */
213         0x75, 0x00,             /* NULL       */
214         0x76, 0x00,             /* NULL       */
215         0x77, 0x15,             /* BRCV=0x115 */
216         0x78, 0x90,             /* ERCV=0x690 */
217         0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
218
219         /* Field length controls */
220
221         0x7a, 0x70,             /* FLC=0 */
222
223         /* The following should not be needed if SBLN = 1 */
224
225         0x7b, 0x16,             /* FAL=22 */
226         0x7c, 0x35,             /* LAL=244 */
227         0x7d, 0x20,             /* LAL=244, FAL=22 */
228 };
229
230 static const unsigned char init_pal[] = {
231         0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
232                                  * YGS=1, INPI=0, DOWN=0 */
233         0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
234         0x63, 0xcb,             /* FSC0 */
235         0x64, 0x8a,             /* FSC1 */
236         0x65, 0x09,             /* FSC2 */
237         0x66, 0x2a,             /* FSC3 */
238 };
239
240 static const unsigned char init_ntsc[] = {
241         0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
242                                  * YGS=1, INPI=0, DOWN=0 */
243         0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
244         0x63, 0x1f,             /* FSC0 */
245         0x64, 0x7c,             /* FSC1 */
246         0x65, 0xf0,             /* FSC2 */
247         0x66, 0x21,             /* FSC3 */
248 };
249
250 static int
251 saa7185_command (struct i2c_client *client,
252                  unsigned int       cmd,
253                  void              *arg)
254 {
255         struct saa7185 *encoder = i2c_get_clientdata(client);
256
257         switch (cmd) {
258
259         case 0:
260                 saa7185_write_block(client, init_common,
261                                     sizeof(init_common));
262                 switch (encoder->norm) {
263
264                 case VIDEO_MODE_NTSC:
265                         saa7185_write_block(client, init_ntsc,
266                                             sizeof(init_ntsc));
267                         break;
268
269                 case VIDEO_MODE_PAL:
270                         saa7185_write_block(client, init_pal,
271                                             sizeof(init_pal));
272                         break;
273                 }
274
275                 break;
276
277         case ENCODER_GET_CAPABILITIES:
278         {
279                 struct video_encoder_capability *cap = arg;
280
281                 cap->flags =
282                     VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
283                     VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
284                 cap->inputs = 1;
285                 cap->outputs = 1;
286         }
287                 break;
288
289         case ENCODER_SET_NORM:
290         {
291                 int *iarg = arg;
292
293                 //saa7185_write_block(client, init_common, sizeof(init_common));
294
295                 switch (*iarg) {
296
297                 case VIDEO_MODE_NTSC:
298                         saa7185_write_block(client, init_ntsc,
299                                             sizeof(init_ntsc));
300                         break;
301
302                 case VIDEO_MODE_PAL:
303                         saa7185_write_block(client, init_pal,
304                                             sizeof(init_pal));
305                         break;
306
307                 case VIDEO_MODE_SECAM:
308                 default:
309                         return -EINVAL;
310
311                 }
312                 encoder->norm = *iarg;
313         }
314                 break;
315
316         case ENCODER_SET_INPUT:
317         {
318                 int *iarg = arg;
319
320                 /* RJ: *iarg = 0: input is from SA7111
321                  *iarg = 1: input is from ZR36060 */
322
323                 switch (*iarg) {
324
325                 case 0:
326                         /* Switch RTCE to 1 */
327                         saa7185_write(client, 0x61,
328                                       (encoder->reg[0x61] & 0xf7) | 0x08);
329                         saa7185_write(client, 0x6e, 0x01);
330                         break;
331
332                 case 1:
333                         /* Switch RTCE to 0 */
334                         saa7185_write(client, 0x61,
335                                       (encoder->reg[0x61] & 0xf7) | 0x00);
336                         /* SW: a slight sync problem... */
337                         saa7185_write(client, 0x6e, 0x00);
338                         break;
339
340                 default:
341                         return -EINVAL;
342
343                 }
344         }
345                 break;
346
347         case ENCODER_SET_OUTPUT:
348         {
349                 int *iarg = arg;
350
351                 /* not much choice of outputs */
352                 if (*iarg != 0) {
353                         return -EINVAL;
354                 }
355         }
356                 break;
357
358         case ENCODER_ENABLE_OUTPUT:
359         {
360                 int *iarg = arg;
361
362                 encoder->enable = !!*iarg;
363                 saa7185_write(client, 0x61,
364                               (encoder->reg[0x61] & 0xbf) |
365                               (encoder->enable ? 0x00 : 0x40));
366         }
367                 break;
368
369         default:
370                 return -EINVAL;
371         }
372
373         return 0;
374 }
375
376 /* ----------------------------------------------------------------------- */
377
378 /*
379  * Generic i2c probe
380  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
381  */
382 static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
383
384 static unsigned short ignore = I2C_CLIENT_END;
385                                                                                 
386 static struct i2c_client_address_data addr_data = {
387         .normal_i2c             = normal_i2c,
388         .probe                  = &ignore,
389         .ignore                 = &ignore,
390 };
391
392 static struct i2c_driver i2c_driver_saa7185;
393
394 static int
395 saa7185_detect_client (struct i2c_adapter *adapter,
396                        int                 address,
397                        int                 kind)
398 {
399         int i;
400         struct i2c_client *client;
401         struct saa7185 *encoder;
402
403         dprintk(1,
404                 KERN_INFO
405                 "saa7185.c: detecting saa7185 client on address 0x%x\n",
406                 address << 1);
407
408         /* Check if the adapter supports the needed features */
409         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
410                 return 0;
411
412         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
413         if (client == 0)
414                 return -ENOMEM;
415         memset(client, 0, sizeof(struct i2c_client));
416         client->addr = address;
417         client->adapter = adapter;
418         client->driver = &i2c_driver_saa7185;
419         client->flags = I2C_CLIENT_ALLOW_USE;
420         strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
421
422         encoder = kmalloc(sizeof(struct saa7185), GFP_KERNEL);
423         if (encoder == NULL) {
424                 kfree(client);
425                 return -ENOMEM;
426         }
427         memset(encoder, 0, sizeof(struct saa7185));
428         encoder->norm = VIDEO_MODE_NTSC;
429         encoder->enable = 1;
430         i2c_set_clientdata(client, encoder);
431
432         i = i2c_attach_client(client);
433         if (i) {
434                 kfree(client);
435                 kfree(encoder);
436                 return i;
437         }
438
439         i = saa7185_write_block(client, init_common, sizeof(init_common));
440         if (i >= 0) {
441                 i = saa7185_write_block(client, init_ntsc,
442                                         sizeof(init_ntsc));
443         }
444         if (i < 0) {
445                 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
446                         I2C_NAME(client), i);
447         } else {
448                 dprintk(1,
449                         KERN_INFO
450                         "%s_attach: chip version %d at address 0x%x\n",
451                         I2C_NAME(client), saa7185_read(client) >> 5,
452                         client->addr << 1);
453         }
454
455         return 0;
456 }
457
458 static int
459 saa7185_attach_adapter (struct i2c_adapter *adapter)
460 {
461         dprintk(1,
462                 KERN_INFO
463                 "saa7185.c: starting probe for adapter %s (0x%x)\n",
464                 I2C_NAME(adapter), adapter->id);
465         return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
466 }
467
468 static int
469 saa7185_detach_client (struct i2c_client *client)
470 {
471         struct saa7185 *encoder = i2c_get_clientdata(client);
472         int err;
473
474         err = i2c_detach_client(client);
475         if (err) {
476                 return err;
477         }
478
479         saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
480         //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
481
482         kfree(encoder);
483         kfree(client);
484
485         return 0;
486 }
487
488 /* ----------------------------------------------------------------------- */
489
490 static struct i2c_driver i2c_driver_saa7185 = {
491         .owner = THIS_MODULE,
492         .name = "saa7185",      /* name */
493
494         .id = I2C_DRIVERID_SAA7185B,
495         .flags = I2C_DF_NOTIFY,
496
497         .attach_adapter = saa7185_attach_adapter,
498         .detach_client = saa7185_detach_client,
499         .command = saa7185_command,
500 };
501
502 static int __init
503 saa7185_init (void)
504 {
505         return i2c_add_driver(&i2c_driver_saa7185);
506 }
507
508 static void __exit
509 saa7185_exit (void)
510 {
511         i2c_del_driver(&i2c_driver_saa7185);
512 }
513
514 module_init(saa7185_init);
515 module_exit(saa7185_exit);