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#include <linux/i2c-dev.h>
53
54#define I2C_NAME(s) (s)->name
55
56#include <linux/video_encoder.h>
57
58static int debug = 0;
59module_param(debug, int, 0);
60MODULE_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
70struct saa7185 {
71 unsigned char reg[128];
72
73 int norm;
74 int enable;
75 int bright;
76 int contrast;
77 int hue;
78 int sat;
79};
80
81#define I2C_SAA7185 0x88
82
83/* ----------------------------------------------------------------------- */
84
85static inline int
86saa7185_read (struct i2c_client *client)
87{
88 return i2c_smbus_read_byte(client);
89}
90
91static int
92saa7185_write (struct i2c_client *client,
93 u8 reg,
94 u8 value)
95{
96 struct saa7185 *encoder = i2c_get_clientdata(client);
97
98 dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
99 encoder->reg[reg] = value;
100 return i2c_smbus_write_byte_data(client, reg, value);
101}
102
103static int
104saa7185_write_block (struct i2c_client *client,
105 const u8 *data,
106 unsigned int len)
107{
108 int ret = -1;
109 u8 reg;
110
111 /* the adv7175 has an autoincrement function, use it if
112 * the adapter understands raw I2C */
113 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
114 /* do raw I2C, not smbus compatible */
115 struct saa7185 *encoder = i2c_get_clientdata(client);
116 struct i2c_msg msg;
117 u8 block_data[32];
118
119 msg.addr = client->addr;
120 msg.flags = 0;
121 while (len >= 2) {
122 msg.buf = (char *) block_data;
123 msg.len = 0;
124 block_data[msg.len++] = reg = data[0];
125 do {
126 block_data[msg.len++] =
127 encoder->reg[reg++] = data[1];
128 len -= 2;
129 data += 2;
130 } while (len >= 2 && data[0] == reg &&
131 msg.len < 32);
132 if ((ret = i2c_transfer(client->adapter,
133 &msg, 1)) < 0)
134 break;
135 }
136 } else {
137 /* do some slow I2C emulation kind of thing */
138 while (len >= 2) {
139 reg = *data++;
140 if ((ret = saa7185_write(client, reg,
141 *data++)) < 0)
142 break;
143 len -= 2;
144 }
145 }
146
147 return ret;
148}
149
150/* ----------------------------------------------------------------------- */
151
152static const unsigned char init_common[] = {
153 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
154 * YUV2C=1, MY2C=1, MUV2C=1 */
155
156 0x42, 0x6b, /* OVLY0=107 */
157 0x43, 0x00, /* OVLU0=0 white */
158 0x44, 0x00, /* OVLV0=0 */
159 0x45, 0x22, /* OVLY1=34 */
160 0x46, 0xac, /* OVLU1=172 yellow */
161 0x47, 0x0e, /* OVLV1=14 */
162 0x48, 0x03, /* OVLY2=3 */
163 0x49, 0x1d, /* OVLU2=29 cyan */
164 0x4a, 0xac, /* OVLV2=172 */
165 0x4b, 0xf0, /* OVLY3=240 */
166 0x4c, 0xc8, /* OVLU3=200 green */
167 0x4d, 0xb9, /* OVLV3=185 */
168 0x4e, 0xd4, /* OVLY4=212 */
169 0x4f, 0x38, /* OVLU4=56 magenta */
170 0x50, 0x47, /* OVLV4=71 */
171 0x51, 0xc1, /* OVLY5=193 */
172 0x52, 0xe3, /* OVLU5=227 red */
173 0x53, 0x54, /* OVLV5=84 */
174 0x54, 0xa3, /* OVLY6=163 */
175 0x55, 0x54, /* OVLU6=84 blue */
176 0x56, 0xf2, /* OVLV6=242 */
177 0x57, 0x90, /* OVLY7=144 */
178 0x58, 0x00, /* OVLU7=0 black */
179 0x59, 0x00, /* OVLV7=0 */
180
181 0x5a, 0x00, /* CHPS=0 */
182 0x5b, 0x76, /* GAINU=118 */
183 0x5c, 0xa5, /* GAINV=165 */
184 0x5d, 0x3c, /* BLCKL=60 */
185 0x5e, 0x3a, /* BLNNL=58 */
186 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
187 0x60, 0x00, /* NULL */
188
189 /* 0x61 - 0x66 set according to norm */
190
191 0x67, 0x00, /* 0 : caption 1st byte odd field */
192 0x68, 0x00, /* 0 : caption 2nd byte odd field */
193 0x69, 0x00, /* 0 : caption 1st byte even field */
194 0x6a, 0x00, /* 0 : caption 2nd byte even field */
195
196 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
197 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
198 * CBLF=0, ORCV2=0, PRCV2=0 */
199 0x6d, 0x00, /* SRCM1=0, CCEN=0 */
200
201 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
202 * least for PAL */
203 0x6f, 0x00, /* HTRIG upper bits */
204 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
205
206 /* The following should not be needed */
207
208 0x71, 0x15, /* BMRQ=0x115 */
209 0x72, 0x90, /* EMRQ=0x690 */
210 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
211 0x74, 0x00, /* NULL */
212 0x75, 0x00, /* NULL */
213 0x76, 0x00, /* NULL */
214 0x77, 0x15, /* BRCV=0x115 */
215 0x78, 0x90, /* ERCV=0x690 */
216 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
217
218 /* Field length controls */
219
220 0x7a, 0x70, /* FLC=0 */
221
222 /* The following should not be needed if SBLN = 1 */
223
224 0x7b, 0x16, /* FAL=22 */
225 0x7c, 0x35, /* LAL=244 */
226 0x7d, 0x20, /* LAL=244, FAL=22 */
227};
228
229static const unsigned char init_pal[] = {
230 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
231 * YGS=1, INPI=0, DOWN=0 */
232 0x62, 0xc8, /* DECTYP=1, BSTA=72 */
233 0x63, 0xcb, /* FSC0 */
234 0x64, 0x8a, /* FSC1 */
235 0x65, 0x09, /* FSC2 */
236 0x66, 0x2a, /* FSC3 */
237};
238
239static const unsigned char init_ntsc[] = {
240 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
241 * YGS=1, INPI=0, DOWN=0 */
242 0x62, 0xe6, /* DECTYP=1, BSTA=102 */
243 0x63, 0x1f, /* FSC0 */
244 0x64, 0x7c, /* FSC1 */
245 0x65, 0xf0, /* FSC2 */
246 0x66, 0x21, /* FSC3 */
247};
248
249static int
250saa7185_command (struct i2c_client *client,
251 unsigned int cmd,
252 void *arg)
253{
254 struct saa7185 *encoder = i2c_get_clientdata(client);
255
256 switch (cmd) {
257
258 case 0:
259 saa7185_write_block(client, init_common,
260 sizeof(init_common));
261 switch (encoder->norm) {
262
263 case VIDEO_MODE_NTSC:
264 saa7185_write_block(client, init_ntsc,
265 sizeof(init_ntsc));
266 break;
267
268 case VIDEO_MODE_PAL:
269 saa7185_write_block(client, init_pal,
270 sizeof(init_pal));
271 break;
272 }
273
274 break;
275
276 case ENCODER_GET_CAPABILITIES:
277 {
278 struct video_encoder_capability *cap = arg;
279
280 cap->flags =
281 VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
282 VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
283 cap->inputs = 1;
284 cap->outputs = 1;
285 }
286 break;
287
288 case ENCODER_SET_NORM:
289 {
290 int *iarg = arg;
291
292 //saa7185_write_block(client, init_common, sizeof(init_common));
293
294 switch (*iarg) {
295
296 case VIDEO_MODE_NTSC:
297 saa7185_write_block(client, init_ntsc,
298 sizeof(init_ntsc));
299 break;
300
301 case VIDEO_MODE_PAL:
302 saa7185_write_block(client, init_pal,
303 sizeof(init_pal));
304 break;
305
306 case VIDEO_MODE_SECAM:
307 default:
308 return -EINVAL;
309
310 }
311 encoder->norm = *iarg;
312 }
313 break;
314
315 case ENCODER_SET_INPUT:
316 {
317 int *iarg = arg;
318
319 /* RJ: *iarg = 0: input is from SA7111
320 *iarg = 1: input is from ZR36060 */
321
322 switch (*iarg) {
323
324 case 0:
325 /* Switch RTCE to 1 */
326 saa7185_write(client, 0x61,
327 (encoder->reg[0x61] & 0xf7) | 0x08);
328 saa7185_write(client, 0x6e, 0x01);
329 break;
330
331 case 1:
332 /* Switch RTCE to 0 */
333 saa7185_write(client, 0x61,
334 (encoder->reg[0x61] & 0xf7) | 0x00);
335 /* SW: a slight sync problem... */
336 saa7185_write(client, 0x6e, 0x00);
337 break;
338
339 default:
340 return -EINVAL;
341
342 }
343 }
344 break;
345
346 case ENCODER_SET_OUTPUT:
347 {
348 int *iarg = arg;
349
350 /* not much choice of outputs */
351 if (*iarg != 0) {
352 return -EINVAL;
353 }
354 }
355 break;
356
357 case ENCODER_ENABLE_OUTPUT:
358 {
359 int *iarg = arg;
360
361 encoder->enable = !!*iarg;
362 saa7185_write(client, 0x61,
363 (encoder->reg[0x61] & 0xbf) |
364 (encoder->enable ? 0x00 : 0x40));
365 }
366 break;
367
368 default:
369 return -EINVAL;
370 }
371
372 return 0;
373}
374
375/* ----------------------------------------------------------------------- */
376
377/*
378 * Generic i2c probe
379 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
380 */
381static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
382
383static unsigned short ignore = I2C_CLIENT_END;
384
385static struct i2c_client_address_data addr_data = {
386 .normal_i2c = normal_i2c,
387 .probe = &ignore,
388 .ignore = &ignore,
389};
390
391static struct i2c_driver i2c_driver_saa7185;
392
393static int
394saa7185_detect_client (struct i2c_adapter *adapter,
395 int address,
396 int kind)
397{
398 int i;
399 struct i2c_client *client;
400 struct saa7185 *encoder;
401
402 dprintk(1,
403 KERN_INFO
404 "saa7185.c: detecting saa7185 client on address 0x%x\n",
405 address << 1);
406
407 /* Check if the adapter supports the needed features */
408 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
409 return 0;
410
411 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
412 if (client == 0)
413 return -ENOMEM;
414 client->addr = address;
415 client->adapter = adapter;
416 client->driver = &i2c_driver_saa7185;
417 strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
418
419 encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
420 if (encoder == NULL) {
421 kfree(client);
422 return -ENOMEM;
423 }
424 encoder->norm = VIDEO_MODE_NTSC;
425 encoder->enable = 1;
426 i2c_set_clientdata(client, encoder);
427
428 i = i2c_attach_client(client);
429 if (i) {
430 kfree(client);
431 kfree(encoder);
432 return i;
433 }
434
435 i = saa7185_write_block(client, init_common, sizeof(init_common));
436 if (i >= 0) {
437 i = saa7185_write_block(client, init_ntsc,
438 sizeof(init_ntsc));
439 }
440 if (i < 0) {
441 dprintk(1, KERN_ERR "%s_attach: init error %d\n",
442 I2C_NAME(client), i);
443 } else {
444 dprintk(1,
445 KERN_INFO
446 "%s_attach: chip version %d at address 0x%x\n",
447 I2C_NAME(client), saa7185_read(client) >> 5,
448 client->addr << 1);
449 }
450
451 return 0;
452}
453
454static int
455saa7185_attach_adapter (struct i2c_adapter *adapter)
456{
457 dprintk(1,
458 KERN_INFO
459 "saa7185.c: starting probe for adapter %s (0x%x)\n",
460 I2C_NAME(adapter), adapter->id);
461 return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
462}
463
464static int
465saa7185_detach_client (struct i2c_client *client)
466{
467 struct saa7185 *encoder = i2c_get_clientdata(client);
468 int err;
469
470 err = i2c_detach_client(client);
471 if (err) {
472 return err;
473 }
474
475 saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
476 //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
477
478 kfree(encoder);
479 kfree(client);
480
481 return 0;
482}
483
484/* ----------------------------------------------------------------------- */
485
486static struct i2c_driver i2c_driver_saa7185 = {
487 .driver = {
488 .name = "saa7185", /* name */
489 },
490
491 .id = I2C_DRIVERID_SAA7185B,
492
493 .attach_adapter = saa7185_attach_adapter,
494 .detach_client = saa7185_detach_client,
495 .command = saa7185_command,
496};
497
498static int __init
499saa7185_init (void)
500{
501 return i2c_add_driver(&i2c_driver_saa7185);
502}
503
504static void __exit
505saa7185_exit (void)
506{
507 i2c_del_driver(&i2c_driver_saa7185);
508}
509
510module_init(saa7185_init);
511module_exit(saa7185_exit);