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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / media / video / adv7170.c
blob80254caa444c9fc40bff4ebe3a8f4dd0bbf23878
1 /*
2 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
3 *
4 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
5 *
6 * Based on adv7176 driver by:
7 *
8 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
9 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
10 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
11 * - some corrections for Pinnacle Systems Inc. DC10plus card.
12 *
13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 */
30
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
35 #include <linux/fs.h>
36 #include <linux/kernel.h>
37 #include <linux/major.h>
38 #include <linux/slab.h>
39 #include <linux/mm.h>
40 #include <linux/pci.h>
41 #include <linux/signal.h>
42 #include <asm/io.h>
43 #include <asm/pgtable.h>
44 #include <asm/page.h>
45 #include <linux/sched.h>
46 #include <asm/segment.h>
47 #include <linux/types.h>
48
49 #include <linux/videodev.h>
50 #include <asm/uaccess.h>
51
52 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
53 MODULE_AUTHOR("Maxim Yevtyushkin");
54 MODULE_LICENSE("GPL");
55
56 #include <linux/i2c.h>
57 #include <linux/i2c-dev.h>
58
59 #define I2C_NAME(x) (x)->name
60
61 #include <linux/video_encoder.h>
62
63 static int debug = 0;
64 module_param(debug, int, 0);
65 MODULE_PARM_DESC(debug, "Debug level (0-1)");
66
67 #define dprintk(num, format, args...) \
68 do { \
69 if (debug >= num) \
70 printk(format, ##args); \
71 } while (0)
72
73 /* ----------------------------------------------------------------------- */
74
75 struct adv7170 {
76 unsigned char reg[128];
77
78 int norm;
79 int input;
80 int enable;
81 int bright;
82 int contrast;
83 int hue;
84 int sat;
85 };
86
87 #define I2C_ADV7170 0xd4
88 #define I2C_ADV7171 0x54
89
90 static char adv7170_name[] = "adv7170";
91 static char adv7171_name[] = "adv7171";
92
93 static char *inputs[] = { "pass_through", "play_back" };
94 static char *norms[] = { "PAL", "NTSC" };
95
96 /* ----------------------------------------------------------------------- */
97
98 static inline int
99 adv7170_write (struct i2c_client *client,
100 u8 reg,
101 u8 value)
102 {
103 struct adv7170 *encoder = i2c_get_clientdata(client);
104
105 encoder->reg[reg] = value;
106 return i2c_smbus_write_byte_data(client, reg, value);
107 }
108
109 static inline int
110 adv7170_read (struct i2c_client *client,
111 u8 reg)
112 {
113 return i2c_smbus_read_byte_data(client, reg);
114 }
115
116 static int
117 adv7170_write_block (struct i2c_client *client,
118 const u8 *data,
119 unsigned int len)
120 {
121 int ret = -1;
122 u8 reg;
123
124 /* the adv7170 has an autoincrement function, use it if
125 * the adapter understands raw I2C */
126 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
127 /* do raw I2C, not smbus compatible */
128 struct adv7170 *encoder = i2c_get_clientdata(client);
129 struct i2c_msg msg;
130 u8 block_data[32];
131
132 msg.addr = client->addr;
133 msg.flags = 0;
134 while (len >= 2) {
135 msg.buf = (char *) block_data;
136 msg.len = 0;
137 block_data[msg.len++] = reg = data[0];
138 do {
139 block_data[msg.len++] =
140 encoder->reg[reg++] = data[1];
141 len -= 2;
142 data += 2;
143 } while (len >= 2 && data[0] == reg &&
144 msg.len < 32);
145 if ((ret = i2c_transfer(client->adapter,
146 &msg, 1)) < 0)
147 break;
148 }
149 } else {
150 /* do some slow I2C emulation kind of thing */
151 while (len >= 2) {
152 reg = *data++;
153 if ((ret = adv7170_write(client, reg,
154 *data++)) < 0)
155 break;
156 len -= 2;
157 }
158 }
159
160 return ret;
161 }
162
163 /* ----------------------------------------------------------------------- */
164 // Output filter: S-Video Composite
165
166 #define MR050 0x11 //0x09
167 #define MR060 0x14 //0x0c
168
169 //---------------------------------------------------------------------------
170
171 #define TR0MODE 0x4c
172 #define TR0RST 0x80
173
174 #define TR1CAPT 0x00
175 #define TR1PLAY 0x00
176
177
178 static const unsigned char init_NTSC[] = {
179 0x00, 0x10, // MR0
180 0x01, 0x20, // MR1
181 0x02, 0x0e, // MR2 RTC control: bits 2 and 1
182 0x03, 0x80, // MR3
183 0x04, 0x30, // MR4
184 0x05, 0x00, // Reserved
185 0x06, 0x00, // Reserved
186 0x07, TR0MODE, // TM0
187 0x08, TR1CAPT, // TM1
188 0x09, 0x16, // Fsc0
189 0x0a, 0x7c, // Fsc1
190 0x0b, 0xf0, // Fsc2
191 0x0c, 0x21, // Fsc3
192 0x0d, 0x00, // Subcarrier Phase
193 0x0e, 0x00, // Closed Capt. Ext 0
194 0x0f, 0x00, // Closed Capt. Ext 1
195 0x10, 0x00, // Closed Capt. 0
196 0x11, 0x00, // Closed Capt. 1
197 0x12, 0x00, // Pedestal Ctl 0
198 0x13, 0x00, // Pedestal Ctl 1
199 0x14, 0x00, // Pedestal Ctl 2
200 0x15, 0x00, // Pedestal Ctl 3
201 0x16, 0x00, // CGMS_WSS_0
202 0x17, 0x00, // CGMS_WSS_1
203 0x18, 0x00, // CGMS_WSS_2
204 0x19, 0x00, // Teletext Ctl
205 };
206
207 static const unsigned char init_PAL[] = {
208 0x00, 0x71, // MR0
209 0x01, 0x20, // MR1
210 0x02, 0x0e, // MR2 RTC control: bits 2 and 1
211 0x03, 0x80, // MR3
212 0x04, 0x30, // MR4
213 0x05, 0x00, // Reserved
214 0x06, 0x00, // Reserved
215 0x07, TR0MODE, // TM0
216 0x08, TR1CAPT, // TM1
217 0x09, 0xcb, // Fsc0
218 0x0a, 0x8a, // Fsc1
219 0x0b, 0x09, // Fsc2
220 0x0c, 0x2a, // Fsc3
221 0x0d, 0x00, // Subcarrier Phase
222 0x0e, 0x00, // Closed Capt. Ext 0
223 0x0f, 0x00, // Closed Capt. Ext 1
224 0x10, 0x00, // Closed Capt. 0
225 0x11, 0x00, // Closed Capt. 1
226 0x12, 0x00, // Pedestal Ctl 0
227 0x13, 0x00, // Pedestal Ctl 1
228 0x14, 0x00, // Pedestal Ctl 2
229 0x15, 0x00, // Pedestal Ctl 3
230 0x16, 0x00, // CGMS_WSS_0
231 0x17, 0x00, // CGMS_WSS_1
232 0x18, 0x00, // CGMS_WSS_2
233 0x19, 0x00, // Teletext Ctl
234 };
235
236
237 static int
238 adv7170_command (struct i2c_client *client,
239 unsigned int cmd,
240 void * arg)
241 {
242 struct adv7170 *encoder = i2c_get_clientdata(client);
243
244 switch (cmd) {
245
246 case 0:
247 #if 0
248 /* This is just for testing!!! */
249 adv7170_write_block(client, init_common,
250 sizeof(init_common));
251 adv7170_write(client, 0x07, TR0MODE | TR0RST);
252 adv7170_write(client, 0x07, TR0MODE);
253 #endif
254 break;
255
256 case ENCODER_GET_CAPABILITIES:
257 {
258 struct video_encoder_capability *cap = arg;
259
260 cap->flags = VIDEO_ENCODER_PAL |
261 VIDEO_ENCODER_NTSC;
262 cap->inputs = 2;
263 cap->outputs = 1;
264 }
265 break;
266
267 case ENCODER_SET_NORM:
268 {
269 int iarg = *(int *) arg;
270
271 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
272 I2C_NAME(client), iarg);
273
274 switch (iarg) {
275
276 case VIDEO_MODE_NTSC:
277 adv7170_write_block(client, init_NTSC,
278 sizeof(init_NTSC));
279 if (encoder->input == 0)
280 adv7170_write(client, 0x02, 0x0e); // Enable genlock
281 adv7170_write(client, 0x07, TR0MODE | TR0RST);
282 adv7170_write(client, 0x07, TR0MODE);
283 break;
284
285 case VIDEO_MODE_PAL:
286 adv7170_write_block(client, init_PAL,
287 sizeof(init_PAL));
288 if (encoder->input == 0)
289 adv7170_write(client, 0x02, 0x0e); // Enable genlock
290 adv7170_write(client, 0x07, TR0MODE | TR0RST);
291 adv7170_write(client, 0x07, TR0MODE);
292 break;
293
294 default:
295 dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
296 I2C_NAME(client), iarg);
297 return -EINVAL;
298
299 }
300 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
301 norms[iarg]);
302 encoder->norm = iarg;
303 }
304 break;
305
306 case ENCODER_SET_INPUT:
307 {
308 int iarg = *(int *) arg;
309
310 /* RJ: *iarg = 0: input is from decoder
311 *iarg = 1: input is from ZR36060
312 *iarg = 2: color bar */
313
314 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
315 I2C_NAME(client),
316 iarg == 0 ? "decoder" : "ZR36060");
317
318 switch (iarg) {
319
320 case 0:
321 adv7170_write(client, 0x01, 0x20);
322 adv7170_write(client, 0x08, TR1CAPT); /* TR1 */
323 adv7170_write(client, 0x02, 0x0e); // Enable genlock
324 adv7170_write(client, 0x07, TR0MODE | TR0RST);
325 adv7170_write(client, 0x07, TR0MODE);
326 //udelay(10);
327 break;
328
329 case 1:
330 adv7170_write(client, 0x01, 0x00);
331 adv7170_write(client, 0x08, TR1PLAY); /* TR1 */
332 adv7170_write(client, 0x02, 0x08);
333 adv7170_write(client, 0x07, TR0MODE | TR0RST);
334 adv7170_write(client, 0x07, TR0MODE);
335 //udelay(10);
336 break;
337
338 default:
339 dprintk(1, KERN_ERR "%s: illegal input: %d\n",
340 I2C_NAME(client), iarg);
341 return -EINVAL;
342
343 }
344 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
345 inputs[iarg]);
346 encoder->input = iarg;
347 }
348 break;
349
350 case ENCODER_SET_OUTPUT:
351 {
352 int *iarg = arg;
353
354 /* not much choice of outputs */
355 if (*iarg != 0) {
356 return -EINVAL;
357 }
358 }
359 break;
360
361 case ENCODER_ENABLE_OUTPUT:
362 {
363 int *iarg = arg;
364
365 encoder->enable = !!*iarg;
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[] =
383 { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
384 I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
385 I2C_CLIENT_END
386 };
387 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
388
389 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
390 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
391 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
392 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
393 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
394
395 static struct i2c_client_address_data addr_data = {
396 .normal_i2c = normal_i2c,
397 .normal_i2c_range = normal_i2c_range,
398 .probe = probe,
399 .probe_range = probe_range,
400 .ignore = ignore,
401 .ignore_range = ignore_range,
402 .force = force
403 };
404
405 static struct i2c_driver i2c_driver_adv7170;
406
407 static int
408 adv7170_detect_client (struct i2c_adapter *adapter,
409 int address,
410 int kind)
411 {
412 int i;
413 struct i2c_client *client;
414 struct adv7170 *encoder;
415 char *dname;
416
417 dprintk(1,
418 KERN_INFO
419 "adv7170.c: detecting adv7170 client on address 0x%x\n",
420 address << 1);
421
422 /* Check if the adapter supports the needed features */
423 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
424 return 0;
425
426 client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
427 if (client == 0)
428 return -ENOMEM;
429 memset(client, 0, sizeof(struct i2c_client));
430 client->addr = address;
431 client->adapter = adapter;
432 client->driver = &i2c_driver_adv7170;
433 client->flags = I2C_CLIENT_ALLOW_USE;
434 if ((client->addr == I2C_ADV7170 >> 1) ||
435 (client->addr == (I2C_ADV7170 >> 1) + 1)) {
436 dname = adv7170_name;
437 } else if ((client->addr == I2C_ADV7171 >> 1) ||
438 (client->addr == (I2C_ADV7171 >> 1) + 1)) {
439 dname = adv7171_name;
440 } else {
441 /* We should never get here!!! */
442 kfree(client);
443 return 0;
444 }
445 strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
446
447 encoder = kmalloc(sizeof(struct adv7170), GFP_KERNEL);
448 if (encoder == NULL) {
449 kfree(client);
450 return -ENOMEM;
451 }
452 memset(encoder, 0, sizeof(struct adv7170));
453 encoder->norm = VIDEO_MODE_NTSC;
454 encoder->input = 0;
455 encoder->enable = 1;
456 i2c_set_clientdata(client, encoder);
457
458 i = i2c_attach_client(client);
459 if (i) {
460 kfree(client);
461 kfree(encoder);
462 return i;
463 }
464
465 i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
466 if (i >= 0) {
467 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
468 i = adv7170_write(client, 0x07, TR0MODE);
469 i = adv7170_read(client, 0x12);
470 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
471 I2C_NAME(client), i & 1, client->addr << 1);
472 }
473 if (i < 0) {
474 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
475 I2C_NAME(client), i);
476 }
477
478 return 0;
479 }
480
481 static int
482 adv7170_attach_adapter (struct i2c_adapter *adapter)
483 {
484 dprintk(1,
485 KERN_INFO
486 "adv7170.c: starting probe for adapter %s (0x%x)\n",
487 I2C_NAME(adapter), adapter->id);
488 return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
489 }
490
491 static int
492 adv7170_detach_client (struct i2c_client *client)
493 {
494 struct adv7170 *encoder = i2c_get_clientdata(client);
495 int err;
496
497 err = i2c_detach_client(client);
498 if (err) {
499 return err;
500 }
501
502 kfree(encoder);
503 kfree(client);
504
505 return 0;
506 }
507
508 /* ----------------------------------------------------------------------- */
509
510 static struct i2c_driver i2c_driver_adv7170 = {
511 .owner = THIS_MODULE,
512 .name = "adv7170", /* name */
513
514 .id = I2C_DRIVERID_ADV7170,
515 .flags = I2C_DF_NOTIFY,
516
517 .attach_adapter = adv7170_attach_adapter,
518 .detach_client = adv7170_detach_client,
519 .command = adv7170_command,
520 };
521
522 static int __init
523 adv7170_init (void)
524 {
525 return i2c_add_driver(&i2c_driver_adv7170);
526 }
527
528 static void __exit
529 adv7170_exit (void)
530 {
531 i2c_del_driver(&i2c_driver_adv7170);
532 }
533
534 module_init(adv7170_init);
535 module_exit(adv7170_exit);
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