tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <linux/types.h>
43
44#include <linux/videodev.h>
45#include <asm/uaccess.h>
46
47MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
48MODULE_AUTHOR("Dave Perks");
49MODULE_LICENSE("GPL");
50
51#include <linux/i2c.h>
52
53#define I2C_NAME(s) (s)->name
54
55#include <linux/video_encoder.h>
56
57static int debug = 0;
58module_param(debug, int, 0);
59MODULE_PARM_DESC(debug, "Debug level (0-1)");
60
61#define dprintk(num, format, args...) \
62 do { \
63 if (debug >= num) \
64 printk(format, ##args); \
65 } while (0)
66
67/* ----------------------------------------------------------------------- */
68
69struct saa7185 {
70 unsigned char reg[128];
71
72 int norm;
73 int enable;
74 int bright;
75 int contrast;
76 int hue;
77 int sat;
78};
79
80#define I2C_SAA7185 0x88
81
82/* ----------------------------------------------------------------------- */
83
84static inline int
85saa7185_read (struct i2c_client *client)
86{
87 return i2c_smbus_read_byte(client);
88}
89
90static int
91saa7185_write (struct i2c_client *client,
92 u8 reg,
93 u8 value)
94{
95 struct saa7185 *encoder = i2c_get_clientdata(client);
96
97 dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
98 encoder->reg[reg] = value;
99 return i2c_smbus_write_byte_data(client, reg, value);
100}
101
102static int
103saa7185_write_block (struct i2c_client *client,
104 const u8 *data,
105 unsigned int len)
106{
107 int ret = -1;
108 u8 reg;
109
110 /* the adv7175 has an autoincrement function, use it if
111 * the adapter understands raw I2C */
112 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
113 /* do raw I2C, not smbus compatible */
114 struct saa7185 *encoder = i2c_get_clientdata(client);
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++] =
123 encoder->reg[reg++] = data[1];
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 = saa7185_write(client, reg,
137 *data++)) < 0)
138 break;
139 len -= 2;
140 }
141 }
142
143 return ret;
144}
145
146/* ----------------------------------------------------------------------- */
147
148static const unsigned char init_common[] = {
149 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
150 * YUV2C=1, MY2C=1, MUV2C=1 */
151
152 0x42, 0x6b, /* OVLY0=107 */
153 0x43, 0x00, /* OVLU0=0 white */
154 0x44, 0x00, /* OVLV0=0 */
155 0x45, 0x22, /* OVLY1=34 */
156 0x46, 0xac, /* OVLU1=172 yellow */
157 0x47, 0x0e, /* OVLV1=14 */
158 0x48, 0x03, /* OVLY2=3 */
159 0x49, 0x1d, /* OVLU2=29 cyan */
160 0x4a, 0xac, /* OVLV2=172 */
161 0x4b, 0xf0, /* OVLY3=240 */
162 0x4c, 0xc8, /* OVLU3=200 green */
163 0x4d, 0xb9, /* OVLV3=185 */
164 0x4e, 0xd4, /* OVLY4=212 */
165 0x4f, 0x38, /* OVLU4=56 magenta */
166 0x50, 0x47, /* OVLV4=71 */
167 0x51, 0xc1, /* OVLY5=193 */
168 0x52, 0xe3, /* OVLU5=227 red */
169 0x53, 0x54, /* OVLV5=84 */
170 0x54, 0xa3, /* OVLY6=163 */
171 0x55, 0x54, /* OVLU6=84 blue */
172 0x56, 0xf2, /* OVLV6=242 */
173 0x57, 0x90, /* OVLY7=144 */
174 0x58, 0x00, /* OVLU7=0 black */
175 0x59, 0x00, /* OVLV7=0 */
176
177 0x5a, 0x00, /* CHPS=0 */
178 0x5b, 0x76, /* GAINU=118 */
179 0x5c, 0xa5, /* GAINV=165 */
180 0x5d, 0x3c, /* BLCKL=60 */
181 0x5e, 0x3a, /* BLNNL=58 */
182 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
183 0x60, 0x00, /* NULL */
184
185 /* 0x61 - 0x66 set according to norm */
186
187 0x67, 0x00, /* 0 : caption 1st byte odd field */
188 0x68, 0x00, /* 0 : caption 2nd byte odd field */
189 0x69, 0x00, /* 0 : caption 1st byte even field */
190 0x6a, 0x00, /* 0 : caption 2nd byte even field */
191
192 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
193 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
194 * CBLF=0, ORCV2=0, PRCV2=0 */
195 0x6d, 0x00, /* SRCM1=0, CCEN=0 */
196
197 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
198 * least for PAL */
199 0x6f, 0x00, /* HTRIG upper bits */
200 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
201
202 /* The following should not be needed */
203
204 0x71, 0x15, /* BMRQ=0x115 */
205 0x72, 0x90, /* EMRQ=0x690 */
206 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
207 0x74, 0x00, /* NULL */
208 0x75, 0x00, /* NULL */
209 0x76, 0x00, /* NULL */
210 0x77, 0x15, /* BRCV=0x115 */
211 0x78, 0x90, /* ERCV=0x690 */
212 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
213
214 /* Field length controls */
215
216 0x7a, 0x70, /* FLC=0 */
217
218 /* The following should not be needed if SBLN = 1 */
219
220 0x7b, 0x16, /* FAL=22 */
221 0x7c, 0x35, /* LAL=244 */
222 0x7d, 0x20, /* LAL=244, FAL=22 */
223};
224
225static const unsigned char init_pal[] = {
226 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
227 * YGS=1, INPI=0, DOWN=0 */
228 0x62, 0xc8, /* DECTYP=1, BSTA=72 */
229 0x63, 0xcb, /* FSC0 */
230 0x64, 0x8a, /* FSC1 */
231 0x65, 0x09, /* FSC2 */
232 0x66, 0x2a, /* FSC3 */
233};
234
235static const unsigned char init_ntsc[] = {
236 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
237 * YGS=1, INPI=0, DOWN=0 */
238 0x62, 0xe6, /* DECTYP=1, BSTA=102 */
239 0x63, 0x1f, /* FSC0 */
240 0x64, 0x7c, /* FSC1 */
241 0x65, 0xf0, /* FSC2 */
242 0x66, 0x21, /* FSC3 */
243};
244
245static int
246saa7185_command (struct i2c_client *client,
247 unsigned int cmd,
248 void *arg)
249{
250 struct saa7185 *encoder = i2c_get_clientdata(client);
251
252 switch (cmd) {
253
254 case 0:
255 saa7185_write_block(client, init_common,
256 sizeof(init_common));
257 switch (encoder->norm) {
258
259 case VIDEO_MODE_NTSC:
260 saa7185_write_block(client, init_ntsc,
261 sizeof(init_ntsc));
262 break;
263
264 case VIDEO_MODE_PAL:
265 saa7185_write_block(client, init_pal,
266 sizeof(init_pal));
267 break;
268 }
269
270 break;
271
272 case ENCODER_GET_CAPABILITIES:
273 {
274 struct video_encoder_capability *cap = arg;
275
276 cap->flags =
277 VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
278 VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
279 cap->inputs = 1;
280 cap->outputs = 1;
281 }
282 break;
283
284 case ENCODER_SET_NORM:
285 {
286 int *iarg = arg;
287
288 //saa7185_write_block(client, init_common, sizeof(init_common));
289
290 switch (*iarg) {
291
292 case VIDEO_MODE_NTSC:
293 saa7185_write_block(client, init_ntsc,
294 sizeof(init_ntsc));
295 break;
296
297 case VIDEO_MODE_PAL:
298 saa7185_write_block(client, init_pal,
299 sizeof(init_pal));
300 break;
301
302 case VIDEO_MODE_SECAM:
303 default:
304 return -EINVAL;
305
306 }
307 encoder->norm = *iarg;
308 }
309 break;
310
311 case ENCODER_SET_INPUT:
312 {
313 int *iarg = arg;
314
315 /* RJ: *iarg = 0: input is from SA7111
316 *iarg = 1: input is from ZR36060 */
317
318 switch (*iarg) {
319
320 case 0:
321 /* Switch RTCE to 1 */
322 saa7185_write(client, 0x61,
323 (encoder->reg[0x61] & 0xf7) | 0x08);
324 saa7185_write(client, 0x6e, 0x01);
325 break;
326
327 case 1:
328 /* Switch RTCE to 0 */
329 saa7185_write(client, 0x61,
330 (encoder->reg[0x61] & 0xf7) | 0x00);
331 /* SW: a slight sync problem... */
332 saa7185_write(client, 0x6e, 0x00);
333 break;
334
335 default:
336 return -EINVAL;
337
338 }
339 }
340 break;
341
342 case ENCODER_SET_OUTPUT:
343 {
344 int *iarg = arg;
345
346 /* not much choice of outputs */
347 if (*iarg != 0) {
348 return -EINVAL;
349 }
350 }
351 break;
352
353 case ENCODER_ENABLE_OUTPUT:
354 {
355 int *iarg = arg;
356
357 encoder->enable = !!*iarg;
358 saa7185_write(client, 0x61,
359 (encoder->reg[0x61] & 0xbf) |
360 (encoder->enable ? 0x00 : 0x40));
361 }
362 break;
363
364 default:
365 return -EINVAL;
366 }
367
368 return 0;
369}
370
371/* ----------------------------------------------------------------------- */
372
373/*
374 * Generic i2c probe
375 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
376 */
377static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
378
379static unsigned short ignore = I2C_CLIENT_END;
380
381static struct i2c_client_address_data addr_data = {
382 .normal_i2c = normal_i2c,
383 .probe = &ignore,
384 .ignore = &ignore,
385};
386
387static struct i2c_driver i2c_driver_saa7185;
388
389static int
390saa7185_detect_client (struct i2c_adapter *adapter,
391 int address,
392 int kind)
393{
394 int i;
395 struct i2c_client *client;
396 struct saa7185 *encoder;
397
398 dprintk(1,
399 KERN_INFO
400 "saa7185.c: detecting saa7185 client on address 0x%x\n",
401 address << 1);
402
403 /* Check if the adapter supports the needed features */
404 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
405 return 0;
406
407 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
408 if (client == 0)
409 return -ENOMEM;
410 client->addr = address;
411 client->adapter = adapter;
412 client->driver = &i2c_driver_saa7185;
413 strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
414
415 encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
416 if (encoder == NULL) {
417 kfree(client);
418 return -ENOMEM;
419 }
420 encoder->norm = VIDEO_MODE_NTSC;
421 encoder->enable = 1;
422 i2c_set_clientdata(client, encoder);
423
424 i = i2c_attach_client(client);
425 if (i) {
426 kfree(client);
427 kfree(encoder);
428 return i;
429 }
430
431 i = saa7185_write_block(client, init_common, sizeof(init_common));
432 if (i >= 0) {
433 i = saa7185_write_block(client, init_ntsc,
434 sizeof(init_ntsc));
435 }
436 if (i < 0) {
437 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
438 I2C_NAME(client), i);
439 } else {
440 dprintk(1,
441 KERN_INFO
442 "%s_attach: chip version %d at address 0x%x\n",
443 I2C_NAME(client), saa7185_read(client) >> 5,
444 client->addr << 1);
445 }
446
447 return 0;
448}
449
450static int
451saa7185_attach_adapter (struct i2c_adapter *adapter)
452{
453 dprintk(1,
454 KERN_INFO
455 "saa7185.c: starting probe for adapter %s (0x%x)\n",
456 I2C_NAME(adapter), adapter->id);
457 return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
458}
459
460static int
461saa7185_detach_client (struct i2c_client *client)
462{
463 struct saa7185 *encoder = i2c_get_clientdata(client);
464 int err;
465
466 err = i2c_detach_client(client);
467 if (err) {
468 return err;
469 }
470
471 saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
472 //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
473
474 kfree(encoder);
475 kfree(client);
476
477 return 0;
478}
479
480/* ----------------------------------------------------------------------- */
481
482static struct i2c_driver i2c_driver_saa7185 = {
483 .driver = {
484 .name = "saa7185", /* name */
485 },
486
487 .id = I2C_DRIVERID_SAA7185B,
488
489 .attach_adapter = saa7185_attach_adapter,
490 .detach_client = saa7185_detach_client,
491 .command = saa7185_command,
492};
493
494static int __init
495saa7185_init (void)
496{
497 return i2c_add_driver(&i2c_driver_saa7185);
498}
499
500static void __exit
501saa7185_exit (void)
502{
503 i2c_del_driver(&i2c_driver_saa7185);
504}
505
506module_init(saa7185_init);
507module_exit(saa7185_exit);