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/signal.h>
37 #include <linux/types.h>
38 #include <linux/i2c.h>
39 #include <asm/io.h>
40 #include <asm/pgtable.h>
41 #include <asm/page.h>
42 #include <asm/uaccess.h>
43
44 #include <linux/videodev.h>
45 #include <linux/video_encoder.h>
46
47 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
48 MODULE_AUTHOR("Dave Perks");
49 MODULE_LICENSE("GPL");
50
51
52 #define I2C_NAME(s) (s)->name
53
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 saa7185 {
68 unsigned char reg[128];
69
70 int norm;
71 int enable;
72 int bright;
73 int contrast;
74 int hue;
75 int sat;
76 };
77
78 #define I2C_SAA7185 0x88
79
80 /* ----------------------------------------------------------------------- */
81
82 static inline int
83 saa7185_read (struct i2c_client *client)
84 {
85 return i2c_smbus_read_byte(client);
86 }
87
88 static int
89 saa7185_write (struct i2c_client *client,
90 u8 reg,
91 u8 value)
92 {
93 struct saa7185 *encoder = i2c_get_clientdata(client);
94
95 dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
96 encoder->reg[reg] = value;
97 return i2c_smbus_write_byte_data(client, reg, value);
98 }
99
100 static int
101 saa7185_write_block (struct i2c_client *client,
102 const u8 *data,
103 unsigned int len)
104 {
105 int ret = -1;
106 u8 reg;
107
108 /* the adv7175 has an autoincrement function, use it if
109 * the adapter understands raw I2C */
110 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
111 /* do raw I2C, not smbus compatible */
112 struct saa7185 *encoder = i2c_get_clientdata(client);
113 u8 block_data[32];
114 int block_len;
115
116 while (len >= 2) {
117 block_len = 0;
118 block_data[block_len++] = reg = data[0];
119 do {
120 block_data[block_len++] =
121 encoder->reg[reg++] = data[1];
122 len -= 2;
123 data += 2;
124 } while (len >= 2 && data[0] == reg &&
125 block_len < 32);
126 if ((ret = i2c_master_send(client, block_data,
127 block_len)) < 0)
128 break;
129 }
130 } else {
131 /* do some slow I2C emulation kind of thing */
132 while (len >= 2) {
133 reg = *data++;
134 if ((ret = saa7185_write(client, reg,
135 *data++)) < 0)
136 break;
137 len -= 2;
138 }
139 }
140
141 return ret;
142 }
143
144 /* ----------------------------------------------------------------------- */
145
146 static const unsigned char init_common[] = {
147 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
148 * YUV2C=1, MY2C=1, MUV2C=1 */
149
150 0x42, 0x6b, /* OVLY0=107 */
151 0x43, 0x00, /* OVLU0=0 white */
152 0x44, 0x00, /* OVLV0=0 */
153 0x45, 0x22, /* OVLY1=34 */
154 0x46, 0xac, /* OVLU1=172 yellow */
155 0x47, 0x0e, /* OVLV1=14 */
156 0x48, 0x03, /* OVLY2=3 */
157 0x49, 0x1d, /* OVLU2=29 cyan */
158 0x4a, 0xac, /* OVLV2=172 */
159 0x4b, 0xf0, /* OVLY3=240 */
160 0x4c, 0xc8, /* OVLU3=200 green */
161 0x4d, 0xb9, /* OVLV3=185 */
162 0x4e, 0xd4, /* OVLY4=212 */
163 0x4f, 0x38, /* OVLU4=56 magenta */
164 0x50, 0x47, /* OVLV4=71 */
165 0x51, 0xc1, /* OVLY5=193 */
166 0x52, 0xe3, /* OVLU5=227 red */
167 0x53, 0x54, /* OVLV5=84 */
168 0x54, 0xa3, /* OVLY6=163 */
169 0x55, 0x54, /* OVLU6=84 blue */
170 0x56, 0xf2, /* OVLV6=242 */
171 0x57, 0x90, /* OVLY7=144 */
172 0x58, 0x00, /* OVLU7=0 black */
173 0x59, 0x00, /* OVLV7=0 */
174
175 0x5a, 0x00, /* CHPS=0 */
176 0x5b, 0x76, /* GAINU=118 */
177 0x5c, 0xa5, /* GAINV=165 */
178 0x5d, 0x3c, /* BLCKL=60 */
179 0x5e, 0x3a, /* BLNNL=58 */
180 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
181 0x60, 0x00, /* NULL */
182
183 /* 0x61 - 0x66 set according to norm */
184
185 0x67, 0x00, /* 0 : caption 1st byte odd field */
186 0x68, 0x00, /* 0 : caption 2nd byte odd field */
187 0x69, 0x00, /* 0 : caption 1st byte even field */
188 0x6a, 0x00, /* 0 : caption 2nd byte even field */
189
190 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
191 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
192 * CBLF=0, ORCV2=0, PRCV2=0 */
193 0x6d, 0x00, /* SRCM1=0, CCEN=0 */
194
195 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
196 * least for PAL */
197 0x6f, 0x00, /* HTRIG upper bits */
198 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
199
200 /* The following should not be needed */
201
202 0x71, 0x15, /* BMRQ=0x115 */
203 0x72, 0x90, /* EMRQ=0x690 */
204 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
205 0x74, 0x00, /* NULL */
206 0x75, 0x00, /* NULL */
207 0x76, 0x00, /* NULL */
208 0x77, 0x15, /* BRCV=0x115 */
209 0x78, 0x90, /* ERCV=0x690 */
210 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
211
212 /* Field length controls */
213
214 0x7a, 0x70, /* FLC=0 */
215
216 /* The following should not be needed if SBLN = 1 */
217
218 0x7b, 0x16, /* FAL=22 */
219 0x7c, 0x35, /* LAL=244 */
220 0x7d, 0x20, /* LAL=244, FAL=22 */
221 };
222
223 static const unsigned char init_pal[] = {
224 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
225 * YGS=1, INPI=0, DOWN=0 */
226 0x62, 0xc8, /* DECTYP=1, BSTA=72 */
227 0x63, 0xcb, /* FSC0 */
228 0x64, 0x8a, /* FSC1 */
229 0x65, 0x09, /* FSC2 */
230 0x66, 0x2a, /* FSC3 */
231 };
232
233 static const unsigned char init_ntsc[] = {
234 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
235 * YGS=1, INPI=0, DOWN=0 */
236 0x62, 0xe6, /* DECTYP=1, BSTA=102 */
237 0x63, 0x1f, /* FSC0 */
238 0x64, 0x7c, /* FSC1 */
239 0x65, 0xf0, /* FSC2 */
240 0x66, 0x21, /* FSC3 */
241 };
242
243 static int
244 saa7185_command (struct i2c_client *client,
245 unsigned int cmd,
246 void *arg)
247 {
248 struct saa7185 *encoder = i2c_get_clientdata(client);
249
250 switch (cmd) {
251
252 case 0:
253 saa7185_write_block(client, init_common,
254 sizeof(init_common));
255 switch (encoder->norm) {
256
257 case VIDEO_MODE_NTSC:
258 saa7185_write_block(client, init_ntsc,
259 sizeof(init_ntsc));
260 break;
261
262 case VIDEO_MODE_PAL:
263 saa7185_write_block(client, init_pal,
264 sizeof(init_pal));
265 break;
266 }
267
268 break;
269
270 case ENCODER_GET_CAPABILITIES:
271 {
272 struct video_encoder_capability *cap = arg;
273
274 cap->flags =
275 VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
276 VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
277 cap->inputs = 1;
278 cap->outputs = 1;
279 }
280 break;
281
282 case ENCODER_SET_NORM:
283 {
284 int *iarg = arg;
285
286 //saa7185_write_block(client, init_common, sizeof(init_common));
287
288 switch (*iarg) {
289
290 case VIDEO_MODE_NTSC:
291 saa7185_write_block(client, init_ntsc,
292 sizeof(init_ntsc));
293 break;
294
295 case VIDEO_MODE_PAL:
296 saa7185_write_block(client, init_pal,
297 sizeof(init_pal));
298 break;
299
300 case VIDEO_MODE_SECAM:
301 default:
302 return -EINVAL;
303
304 }
305 encoder->norm = *iarg;
306 }
307 break;
308
309 case ENCODER_SET_INPUT:
310 {
311 int *iarg = arg;
312
313 /* RJ: *iarg = 0: input is from SA7111
314 *iarg = 1: input is from ZR36060 */
315
316 switch (*iarg) {
317
318 case 0:
319 /* Switch RTCE to 1 */
320 saa7185_write(client, 0x61,
321 (encoder->reg[0x61] & 0xf7) | 0x08);
322 saa7185_write(client, 0x6e, 0x01);
323 break;
324
325 case 1:
326 /* Switch RTCE to 0 */
327 saa7185_write(client, 0x61,
328 (encoder->reg[0x61] & 0xf7) | 0x00);
329 /* SW: a slight sync problem... */
330 saa7185_write(client, 0x6e, 0x00);
331 break;
332
333 default:
334 return -EINVAL;
335
336 }
337 }
338 break;
339
340 case ENCODER_SET_OUTPUT:
341 {
342 int *iarg = arg;
343
344 /* not much choice of outputs */
345 if (*iarg != 0) {
346 return -EINVAL;
347 }
348 }
349 break;
350
351 case ENCODER_ENABLE_OUTPUT:
352 {
353 int *iarg = arg;
354
355 encoder->enable = !!*iarg;
356 saa7185_write(client, 0x61,
357 (encoder->reg[0x61] & 0xbf) |
358 (encoder->enable ? 0x00 : 0x40));
359 }
360 break;
361
362 default:
363 return -EINVAL;
364 }
365
366 return 0;
367 }
368
369 /* ----------------------------------------------------------------------- */
370
371 /*
372 * Generic i2c probe
373 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
374 */
375 static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
376
377 static unsigned short ignore = I2C_CLIENT_END;
378
379 static struct i2c_client_address_data addr_data = {
380 .normal_i2c = normal_i2c,
381 .probe = &ignore,
382 .ignore = &ignore,
383 };
384
385 static struct i2c_driver i2c_driver_saa7185;
386
387 static int
388 saa7185_detect_client (struct i2c_adapter *adapter,
389 int address,
390 int kind)
391 {
392 int i;
393 struct i2c_client *client;
394 struct saa7185 *encoder;
395
396 dprintk(1,
397 KERN_INFO
398 "saa7185.c: detecting saa7185 client on address 0x%x\n",
399 address << 1);
400
401 /* Check if the adapter supports the needed features */
402 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
403 return 0;
404
405 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
406 if (!client)
407 return -ENOMEM;
408 client->addr = address;
409 client->adapter = adapter;
410 client->driver = &i2c_driver_saa7185;
411 strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
412
413 encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
414 if (encoder == NULL) {
415 kfree(client);
416 return -ENOMEM;
417 }
418 encoder->norm = VIDEO_MODE_NTSC;
419 encoder->enable = 1;
420 i2c_set_clientdata(client, encoder);
421
422 i = i2c_attach_client(client);
423 if (i) {
424 kfree(client);
425 kfree(encoder);
426 return i;
427 }
428
429 i = saa7185_write_block(client, init_common, sizeof(init_common));
430 if (i >= 0) {
431 i = saa7185_write_block(client, init_ntsc,
432 sizeof(init_ntsc));
433 }
434 if (i < 0) {
435 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
436 I2C_NAME(client), i);
437 } else {
438 dprintk(1,
439 KERN_INFO
440 "%s_attach: chip version %d at address 0x%x\n",
441 I2C_NAME(client), saa7185_read(client) >> 5,
442 client->addr << 1);
443 }
444
445 return 0;
446 }
447
448 static int
449 saa7185_attach_adapter (struct i2c_adapter *adapter)
450 {
451 dprintk(1,
452 KERN_INFO
453 "saa7185.c: starting probe for adapter %s (0x%x)\n",
454 I2C_NAME(adapter), adapter->id);
455 return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
456 }
457
458 static int
459 saa7185_detach_client (struct i2c_client *client)
460 {
461 struct saa7185 *encoder = i2c_get_clientdata(client);
462 int err;
463
464 err = i2c_detach_client(client);
465 if (err) {
466 return err;
467 }
468
469 saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
470 //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
471
472 kfree(encoder);
473 kfree(client);
474
475 return 0;
476 }
477
478 /* ----------------------------------------------------------------------- */
479
480 static struct i2c_driver i2c_driver_saa7185 = {
481 .driver = {
482 .name = "saa7185", /* name */
483 },
484
485 .id = I2C_DRIVERID_SAA7185B,
486
487 .attach_adapter = saa7185_attach_adapter,
488 .detach_client = saa7185_detach_client,
489 .command = saa7185_command,
490 };
491
492 static int __init
493 saa7185_init (void)
494 {
495 return i2c_add_driver(&i2c_driver_saa7185);
496 }
497
498 static void __exit
499 saa7185_exit (void)
500 {
501 i2c_del_driver(&i2c_driver_saa7185);
502 }
503
504 module_init(saa7185_init);
505 module_exit(saa7185_exit);
506
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