cxusb: treat firmware data as const
[linux-2.6] / drivers / media / video / adv7170.c
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/signal.h>
41 #include <linux/types.h>
42 #include <linux/i2c.h>
43 #include <asm/io.h>
44 #include <asm/pgtable.h>
45 #include <asm/page.h>
46 #include <asm/uaccess.h>
47
48 #include <linux/videodev.h>
49 #include <linux/video_encoder.h>
50
51 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
52 MODULE_AUTHOR("Maxim Yevtyushkin");
53 MODULE_LICENSE("GPL");
54
55
56 #define I2C_NAME(x) (x)->name
57
58
59 static int debug;
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 adv7170 {
72         unsigned char reg[128];
73
74         int norm;
75         int input;
76         int enable;
77         int bright;
78         int contrast;
79         int hue;
80         int sat;
81 };
82
83 #define   I2C_ADV7170        0xd4
84 #define   I2C_ADV7171        0x54
85
86 static char adv7170_name[] = "adv7170";
87 static char adv7171_name[] = "adv7171";
88
89 static char *inputs[] = { "pass_through", "play_back" };
90 static char *norms[] = { "PAL", "NTSC" };
91
92 /* ----------------------------------------------------------------------- */
93
94 static inline int
95 adv7170_write (struct i2c_client *client,
96                u8                 reg,
97                u8                 value)
98 {
99         struct adv7170 *encoder = i2c_get_clientdata(client);
100
101         encoder->reg[reg] = value;
102         return i2c_smbus_write_byte_data(client, reg, value);
103 }
104
105 static inline int
106 adv7170_read (struct i2c_client *client,
107               u8                 reg)
108 {
109         return i2c_smbus_read_byte_data(client, reg);
110 }
111
112 static int
113 adv7170_write_block (struct i2c_client *client,
114                      const u8          *data,
115                      unsigned int       len)
116 {
117         int ret = -1;
118         u8 reg;
119
120         /* the adv7170 has an autoincrement function, use it if
121          * the adapter understands raw I2C */
122         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
123                 /* do raw I2C, not smbus compatible */
124                 struct adv7170 *encoder = i2c_get_clientdata(client);
125                 u8 block_data[32];
126                 int block_len;
127
128                 while (len >= 2) {
129                         block_len = 0;
130                         block_data[block_len++] = reg = data[0];
131                         do {
132                                 block_data[block_len++] =
133                                     encoder->reg[reg++] = data[1];
134                                 len -= 2;
135                                 data += 2;
136                         } while (len >= 2 && data[0] == reg &&
137                                  block_len < 32);
138                         if ((ret = i2c_master_send(client, block_data,
139                                                    block_len)) < 0)
140                                 break;
141                 }
142         } else {
143                 /* do some slow I2C emulation kind of thing */
144                 while (len >= 2) {
145                         reg = *data++;
146                         if ((ret = adv7170_write(client, reg,
147                                                  *data++)) < 0)
148                                 break;
149                         len -= 2;
150                 }
151         }
152
153         return ret;
154 }
155
156 /* ----------------------------------------------------------------------- */
157 // Output filter:  S-Video  Composite
158
159 #define MR050       0x11        //0x09
160 #define MR060       0x14        //0x0c
161
162 //---------------------------------------------------------------------------
163
164 #define TR0MODE     0x4c
165 #define TR0RST      0x80
166
167 #define TR1CAPT     0x00
168 #define TR1PLAY     0x00
169
170
171 static const unsigned char init_NTSC[] = {
172         0x00, 0x10,             // MR0
173         0x01, 0x20,             // MR1
174         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
175         0x03, 0x80,             // MR3
176         0x04, 0x30,             // MR4
177         0x05, 0x00,             // Reserved
178         0x06, 0x00,             // Reserved
179         0x07, TR0MODE,          // TM0
180         0x08, TR1CAPT,          // TM1
181         0x09, 0x16,             // Fsc0
182         0x0a, 0x7c,             // Fsc1
183         0x0b, 0xf0,             // Fsc2
184         0x0c, 0x21,             // Fsc3
185         0x0d, 0x00,             // Subcarrier Phase
186         0x0e, 0x00,             // Closed Capt. Ext 0
187         0x0f, 0x00,             // Closed Capt. Ext 1
188         0x10, 0x00,             // Closed Capt. 0
189         0x11, 0x00,             // Closed Capt. 1
190         0x12, 0x00,             // Pedestal Ctl 0
191         0x13, 0x00,             // Pedestal Ctl 1
192         0x14, 0x00,             // Pedestal Ctl 2
193         0x15, 0x00,             // Pedestal Ctl 3
194         0x16, 0x00,             // CGMS_WSS_0
195         0x17, 0x00,             // CGMS_WSS_1
196         0x18, 0x00,             // CGMS_WSS_2
197         0x19, 0x00,             // Teletext Ctl
198 };
199
200 static const unsigned char init_PAL[] = {
201         0x00, 0x71,             // MR0
202         0x01, 0x20,             // MR1
203         0x02, 0x0e,             // MR2 RTC control: bits 2 and 1
204         0x03, 0x80,             // MR3
205         0x04, 0x30,             // MR4
206         0x05, 0x00,             // Reserved
207         0x06, 0x00,             // Reserved
208         0x07, TR0MODE,          // TM0
209         0x08, TR1CAPT,          // TM1
210         0x09, 0xcb,             // Fsc0
211         0x0a, 0x8a,             // Fsc1
212         0x0b, 0x09,             // Fsc2
213         0x0c, 0x2a,             // Fsc3
214         0x0d, 0x00,             // Subcarrier Phase
215         0x0e, 0x00,             // Closed Capt. Ext 0
216         0x0f, 0x00,             // Closed Capt. Ext 1
217         0x10, 0x00,             // Closed Capt. 0
218         0x11, 0x00,             // Closed Capt. 1
219         0x12, 0x00,             // Pedestal Ctl 0
220         0x13, 0x00,             // Pedestal Ctl 1
221         0x14, 0x00,             // Pedestal Ctl 2
222         0x15, 0x00,             // Pedestal Ctl 3
223         0x16, 0x00,             // CGMS_WSS_0
224         0x17, 0x00,             // CGMS_WSS_1
225         0x18, 0x00,             // CGMS_WSS_2
226         0x19, 0x00,             // Teletext Ctl
227 };
228
229
230 static int
231 adv7170_command (struct i2c_client *client,
232                  unsigned int       cmd,
233                  void *             arg)
234 {
235         struct adv7170 *encoder = i2c_get_clientdata(client);
236
237         switch (cmd) {
238
239         case 0:
240 #if 0
241                 /* This is just for testing!!! */
242                 adv7170_write_block(client, init_common,
243                                     sizeof(init_common));
244                 adv7170_write(client, 0x07, TR0MODE | TR0RST);
245                 adv7170_write(client, 0x07, TR0MODE);
246 #endif
247                 break;
248
249         case ENCODER_GET_CAPABILITIES:
250         {
251                 struct video_encoder_capability *cap = arg;
252
253                 cap->flags = VIDEO_ENCODER_PAL |
254                              VIDEO_ENCODER_NTSC;
255                 cap->inputs = 2;
256                 cap->outputs = 1;
257         }
258                 break;
259
260         case ENCODER_SET_NORM:
261         {
262                 int iarg = *(int *) arg;
263
264                 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
265                         I2C_NAME(client), iarg);
266
267                 switch (iarg) {
268
269                 case VIDEO_MODE_NTSC:
270                         adv7170_write_block(client, init_NTSC,
271                                             sizeof(init_NTSC));
272                         if (encoder->input == 0)
273                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
274                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
275                         adv7170_write(client, 0x07, TR0MODE);
276                         break;
277
278                 case VIDEO_MODE_PAL:
279                         adv7170_write_block(client, init_PAL,
280                                             sizeof(init_PAL));
281                         if (encoder->input == 0)
282                                 adv7170_write(client, 0x02, 0x0e);      // Enable genlock
283                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
284                         adv7170_write(client, 0x07, TR0MODE);
285                         break;
286
287                 default:
288                         dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
289                                I2C_NAME(client), iarg);
290                         return -EINVAL;
291
292                 }
293                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
294                         norms[iarg]);
295                 encoder->norm = iarg;
296         }
297                 break;
298
299         case ENCODER_SET_INPUT:
300         {
301                 int iarg = *(int *) arg;
302
303                 /* RJ: *iarg = 0: input is from decoder
304                  *iarg = 1: input is from ZR36060
305                  *iarg = 2: color bar */
306
307                 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
308                         I2C_NAME(client),
309                         iarg == 0 ? "decoder" : "ZR36060");
310
311                 switch (iarg) {
312
313                 case 0:
314                         adv7170_write(client, 0x01, 0x20);
315                         adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */
316                         adv7170_write(client, 0x02, 0x0e);      // Enable genlock
317                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
318                         adv7170_write(client, 0x07, TR0MODE);
319                         //udelay(10);
320                         break;
321
322                 case 1:
323                         adv7170_write(client, 0x01, 0x00);
324                         adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */
325                         adv7170_write(client, 0x02, 0x08);
326                         adv7170_write(client, 0x07, TR0MODE | TR0RST);
327                         adv7170_write(client, 0x07, TR0MODE);
328                         //udelay(10);
329                         break;
330
331                 default:
332                         dprintk(1, KERN_ERR "%s: illegal input: %d\n",
333                                 I2C_NAME(client), iarg);
334                         return -EINVAL;
335
336                 }
337                 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
338                         inputs[iarg]);
339                 encoder->input = iarg;
340         }
341                 break;
342
343         case ENCODER_SET_OUTPUT:
344         {
345                 int *iarg = arg;
346
347                 /* not much choice of outputs */
348                 if (*iarg != 0) {
349                         return -EINVAL;
350                 }
351         }
352                 break;
353
354         case ENCODER_ENABLE_OUTPUT:
355         {
356                 int *iarg = arg;
357
358                 encoder->enable = !!*iarg;
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[] =
376     { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
377         I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
378         I2C_CLIENT_END
379 };
380
381 static unsigned short ignore = I2C_CLIENT_END;
382
383 static struct i2c_client_address_data addr_data = {
384         .normal_i2c             = normal_i2c,
385         .probe                  = &ignore,
386         .ignore                 = &ignore,
387 };
388
389 static struct i2c_driver i2c_driver_adv7170;
390
391 static int
392 adv7170_detect_client (struct i2c_adapter *adapter,
393                        int                 address,
394                        int                 kind)
395 {
396         int i;
397         struct i2c_client *client;
398         struct adv7170 *encoder;
399         char *dname;
400
401         dprintk(1,
402                 KERN_INFO
403                 "adv7170.c: detecting adv7170 client on address 0x%x\n",
404                 address << 1);
405
406         /* Check if the adapter supports the needed features */
407         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
408                 return 0;
409
410         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
411         if (!client)
412                 return -ENOMEM;
413         client->addr = address;
414         client->adapter = adapter;
415         client->driver = &i2c_driver_adv7170;
416         if ((client->addr == I2C_ADV7170 >> 1) ||
417             (client->addr == (I2C_ADV7170 >> 1) + 1)) {
418                 dname = adv7170_name;
419         } else if ((client->addr == I2C_ADV7171 >> 1) ||
420                    (client->addr == (I2C_ADV7171 >> 1) + 1)) {
421                 dname = adv7171_name;
422         } else {
423                 /* We should never get here!!! */
424                 kfree(client);
425                 return 0;
426         }
427         strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
428
429         encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
430         if (encoder == NULL) {
431                 kfree(client);
432                 return -ENOMEM;
433         }
434         encoder->norm = VIDEO_MODE_NTSC;
435         encoder->input = 0;
436         encoder->enable = 1;
437         i2c_set_clientdata(client, encoder);
438
439         i = i2c_attach_client(client);
440         if (i) {
441                 kfree(client);
442                 kfree(encoder);
443                 return i;
444         }
445
446         i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
447         if (i >= 0) {
448                 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
449                 i = adv7170_write(client, 0x07, TR0MODE);
450                 i = adv7170_read(client, 0x12);
451                 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
452                         I2C_NAME(client), i & 1, client->addr << 1);
453         }
454         if (i < 0) {
455                 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
456                        I2C_NAME(client), i);
457         }
458
459         return 0;
460 }
461
462 static int
463 adv7170_attach_adapter (struct i2c_adapter *adapter)
464 {
465         dprintk(1,
466                 KERN_INFO
467                 "adv7170.c: starting probe for adapter %s (0x%x)\n",
468                 I2C_NAME(adapter), adapter->id);
469         return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
470 }
471
472 static int
473 adv7170_detach_client (struct i2c_client *client)
474 {
475         struct adv7170 *encoder = i2c_get_clientdata(client);
476         int err;
477
478         err = i2c_detach_client(client);
479         if (err) {
480                 return err;
481         }
482
483         kfree(encoder);
484         kfree(client);
485
486         return 0;
487 }
488
489 /* ----------------------------------------------------------------------- */
490
491 static struct i2c_driver i2c_driver_adv7170 = {
492         .driver = {
493                 .name = "adv7170",      /* name */
494         },
495
496         .id = I2C_DRIVERID_ADV7170,
497
498         .attach_adapter = adv7170_attach_adapter,
499         .detach_client = adv7170_detach_client,
500         .command = adv7170_command,
501 };
502
503 static int __init
504 adv7170_init (void)
505 {
506         return i2c_add_driver(&i2c_driver_adv7170);
507 }
508
509 static void __exit
510 adv7170_exit (void)
511 {
512         i2c_del_driver(&i2c_driver_adv7170);
513 }
514
515 module_init(adv7170_init);
516 module_exit(adv7170_exit);