1 /*
2 bt819 - BT819A VideoStream Decoder (Rockwell Part)
3
4 Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5 Copyright (C) 1998 Dave Perks <dperks@ibm.net>
6
7 Modifications for LML33/DC10plus unified driver
8 Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
9
10 This code was modify/ported from the saa7111 driver written
11 by Dave Perks.
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/delay.h>
31 #include <linux/errno.h>
32 #include <linux/fs.h>
33 #include <linux/kernel.h>
34 #include <linux/slab.h>
35 #include <linux/mm.h>
36 #include <linux/pci.h>
37 #include <linux/signal.h>
38 #include <linux/sched.h>
39
40 #include <linux/videodev.h>
41
42 #include <linux/i2c-old.h>
43 #include <linux/video_decoder.h>
44
45 #define DEBUG(x) x /* Debug driver */
46
47 /* ----------------------------------------------------------------------- */
48
49 struct bt819 {
50 struct i2c_bus *bus;
51 int addr;
52 unsigned char reg[32];
53
54 int initialized;
55 int norm;
56 int input;
57 int enable;
58 int bright;
59 int contrast;
60 int hue;
61 int sat;
62 };
63
64 struct timing {
65 int hactive;
66 int hdelay;
67 int vactive;
68 int vdelay;
69 int hscale;
70 int vscale;
71 };
72
73 struct timing timing_data[] = {
74 {864 - 24, 2, 623, 1, 0x0504, 0x0000},
75 {858 - 24, 2, 523, 1, 0x00f8, 0x0000},
76 // { 858-68, 64, 523, 1, 0x00f8, 0x0000 },
77 };
78
79 #define I2C_BT819 0x8a
80
81 #define I2C_DELAY 10
82
83 /* ----------------------------------------------------------------------- */
84
bt819_write(struct bt819 * dev,unsigned char subaddr,unsigned char data)85 static int bt819_write(struct bt819 *dev, unsigned char subaddr,
86 unsigned char data)
87 {
88 int ack;
89
90 LOCK_I2C_BUS(dev->bus);
91 i2c_start(dev->bus);
92 i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
93 i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
94 ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
95 dev->reg[subaddr] = data;
96 i2c_stop(dev->bus);
97 UNLOCK_I2C_BUS(dev->bus);
98 return ack;
99 }
100
bt819_setbit(struct bt819 * dev,int subaddr,int bit,int data)101 static int bt819_setbit(struct bt819 *dev, int subaddr, int bit, int data)
102 {
103 return bt819_write(dev, subaddr, (dev->reg[subaddr] & ~(1 << bit)) | (data ? (1 << bit) : 0));
104 }
105
bt819_write_block(struct bt819 * dev,unsigned const char * data,unsigned int len)106 static int bt819_write_block(struct bt819 *dev, unsigned const char *data,
107 unsigned int len)
108 {
109 int ack;
110 unsigned subaddr;
111
112 ack = 0;
113 while (len > 1) {
114 LOCK_I2C_BUS(dev->bus);
115 i2c_start(dev->bus);
116 i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
117 ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
118 ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++),
119 I2C_DELAY);
120 len -= 2;
121 while (len > 1 && *data == ++subaddr) {
122 data++;
123 ack =
124 i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
125 len -= 2;
126 }
127 i2c_stop(dev->bus);
128 UNLOCK_I2C_BUS(dev->bus);
129 }
130 return ack;
131 }
132
bt819_read(struct bt819 * dev,unsigned char subaddr)133 static int bt819_read(struct bt819 *dev, unsigned char subaddr)
134 {
135 int data;
136
137 LOCK_I2C_BUS(dev->bus);
138 i2c_start(dev->bus);
139 i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
140 i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
141 i2c_start(dev->bus);
142 i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
143 data = i2c_readbyte(dev->bus, 1);
144 i2c_stop(dev->bus);
145 UNLOCK_I2C_BUS(dev->bus);
146 return data;
147 }
148
bt819_init(struct i2c_device * device)149 static int bt819_init(struct i2c_device *device)
150 {
151 struct bt819 *decoder;
152
153 static unsigned char init[] = {
154 //0x1f, 0x00, /* Reset */
155 0x01, 0x59, /* 0x01 input format */
156 0x02, 0x00, /* 0x02 temporal decimation */
157 0x03, 0x12, /* 0x03 Cropping msb */
158 0x04, 0x16, /* 0x04 Vertical Delay, lsb */
159 0x05, 0xe0, /* 0x05 Vertical Active lsb */
160 0x06, 0x80, /* 0x06 Horizontal Delay lsb */
161 0x07, 0xd0, /* 0x07 Horizontal Active lsb */
162 0x08, 0x00, /* 0x08 Horizontal Scaling msb */
163 0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
164 0x0a, 0x00, /* 0x0a Brightness control */
165 0x0b, 0x30, /* 0x0b Miscellaneous control */
166 0x0c, 0xd8, /* 0x0c Luma Gain lsb */
167 0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
168 0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
169 0x0f, 0x00, /* 0x0f Hue control */
170 0x12, 0x04, /* 0x12 Output Format */
171 0x13, 0x20, /* 0x13 Vertial Scaling msb 0x60, */
172 0x14, 0x00, /* 0x14 Vertial Scaling lsb */
173 0x16, 0x04, /* 0x16 Video Timing Polarity 0x02, */
174 0x18, 0x68, /* 0x18 AGC Delay */
175 0x19, 0x5d, /* 0x19 Burst Gate Delay */
176 0x1a, 0x80, /* 0x1a ADC Interface */
177 };
178
179 struct timing *timing;
180
181 decoder = device->data;
182 timing = &timing_data[decoder->norm];
183
184 init[3 * 2 - 1] = (((timing->vdelay >> 8) & 0x03) << 6) |
185 (((timing->vactive >> 8) & 0x03) << 4) |
186 (((timing->hdelay >> 8) & 0x03) << 2) |
187 ((timing->hactive >> 8) & 0x03);
188 init[4 * 2 - 1] = timing->vdelay & 0xff;
189 init[5 * 2 - 1] = timing->vactive & 0xff;
190 init[6 * 2 - 1] = timing->hdelay & 0xff;
191 init[7 * 2 - 1] = timing->hactive & 0xff;
192 init[8 * 2 - 1] = timing->hscale >> 8;
193 init[9 * 2 - 1] = timing->hscale & 0xff;
194
195 bt819_write(decoder, 0x1f, 0x00);
196 mdelay(1);
197 return bt819_write_block(decoder, init, sizeof(init));
198
199 }
200
201 /* ----------------------------------------------------------------------- */
202
bt819_attach(struct i2c_device * device)203 static int bt819_attach(struct i2c_device *device)
204 {
205 int i;
206 struct bt819 *decoder;
207
208 MOD_INC_USE_COUNT;
209
210 device->data = decoder = kmalloc(sizeof(struct bt819), GFP_KERNEL);
211 if (decoder == NULL) {
212 MOD_DEC_USE_COUNT;
213 return -ENOMEM;
214 }
215
216 memset(decoder, 0, sizeof(struct bt819));
217 strcpy(device->name, "bt819");
218 decoder->bus = device->bus;
219 decoder->addr = device->addr;
220 decoder->norm = VIDEO_MODE_NTSC;
221 decoder->input = 0;
222 decoder->enable = 1;
223 decoder->bright = 32768;
224 decoder->contrast = 32768;
225 decoder->hue = 32768;
226 decoder->sat = 32768;
227 decoder->initialized = 0;
228
229 i = bt819_init(device);
230 if (i < 0) {
231 printk(KERN_ERR "%s: bt819_attach: init status %d\n",
232 decoder->bus->name, i);
233 } else {
234 printk(KERN_INFO "%s: bt819_attach: chip version %x\n",
235 decoder->bus->name, bt819_read(decoder,
236 0x17) & 0x0f);
237 }
238 return 0;
239 }
240
bt819_detach(struct i2c_device * device)241 static int bt819_detach(struct i2c_device *device)
242 {
243 kfree(device->data);
244 MOD_DEC_USE_COUNT;
245 return 0;
246 }
247
bt819_command(struct i2c_device * device,unsigned int cmd,void * arg)248 static int bt819_command(struct i2c_device *device, unsigned int cmd, void *arg)
249 {
250 int temp;
251
252 struct bt819 *decoder = device->data;
253 //return 0;
254
255 if (!decoder->initialized) { // First call to bt819_init could be
256 bt819_init(device); // without #FRST = 0
257 decoder->initialized = 1;
258 }
259
260 switch (cmd) {
261
262 case DECODER_GET_CAPABILITIES:
263 {
264 struct video_decoder_capability *cap = arg;
265
266 cap->flags
267 = VIDEO_DECODER_PAL
268 | VIDEO_DECODER_NTSC | VIDEO_DECODER_CCIR;
269 cap->inputs = 8;
270 cap->outputs = 1;
271 }
272 break;
273
274 case DECODER_GET_STATUS:
275 {
276 int *iarg = arg;
277 int status;
278 int res;
279
280 status = bt819_read(decoder, 0x00);
281 res = 0;
282 if ((status & 0x80)) {
283 res |= DECODER_STATUS_GOOD;
284 }
285 switch (decoder->norm) {
286 case VIDEO_MODE_NTSC:
287 res |= DECODER_STATUS_NTSC;
288 break;
289 case VIDEO_MODE_PAL:
290 res |= DECODER_STATUS_PAL;
291 break;
292 default:
293 case VIDEO_MODE_AUTO:
294 if ((status & 0x10)) {
295 res |= DECODER_STATUS_PAL;
296 } else {
297 res |= DECODER_STATUS_NTSC;
298 }
299 break;
300 }
301 res |= DECODER_STATUS_COLOR;
302 *iarg = res;
303
304 DEBUG(printk(KERN_INFO "%s-bt819: get status %x\n",
305 decoder->bus->name, *iarg));
306 }
307 break;
308
309 case DECODER_SET_NORM:
310 {
311 int *iarg = arg;
312 struct timing *timing;
313
314 DEBUG(printk(KERN_INFO "%s-bt819: set norm %x\n",
315 decoder->bus->name, *iarg));
316
317 if (*iarg == VIDEO_MODE_NTSC) {
318 bt819_setbit(decoder, 0x01, 0, 1);
319 bt819_setbit(decoder, 0x01, 1, 0);
320 bt819_write(decoder, 0x18, 0x68);
321 bt819_write(decoder, 0x19, 0x5d);
322 //bt819_setbit(decoder, 0x1a, 5, 1);
323 timing = &timing_data[VIDEO_MODE_NTSC];
324 } else {
325 bt819_setbit(decoder, 0x01, 0, 1);
326 bt819_setbit(decoder, 0x01, 1, 1);
327 bt819_write(decoder, 0x18, 0x7f);
328 bt819_write(decoder, 0x19, 0x72);
329 //bt819_setbit(decoder, 0x1a, 5, 0);
330 timing = &timing_data[VIDEO_MODE_PAL];
331 }
332
333 bt819_write(decoder, 0x03,
334 (((timing->vdelay >> 8) & 0x03) << 6) |
335 (((timing->
336 vactive >> 8) & 0x03) << 4) |
337 (((timing->
338 hdelay >> 8) & 0x03) << 2) |
339 ((timing->hactive >> 8) & 0x03));
340 bt819_write(decoder, 0x04, timing->vdelay & 0xff);
341 bt819_write(decoder, 0x05, timing->vactive & 0xff);
342 bt819_write(decoder, 0x06, timing->hdelay & 0xff);
343 bt819_write(decoder, 0x07, timing->hactive & 0xff);
344 bt819_write(decoder, 0x08, timing->hscale >> 8);
345 bt819_write(decoder, 0x09, timing->hscale & 0xff);
346 decoder->norm = *iarg;
347 }
348 break;
349
350 case DECODER_SET_INPUT:
351 {
352 int *iarg = arg;
353
354 DEBUG(printk(KERN_INFO "%s-bt819: set input %x\n",
355 decoder->bus->name, *iarg));
356
357 if (*iarg < 0 || *iarg > 7) {
358 return -EINVAL;
359 }
360
361 if (decoder->input != *iarg) {
362 decoder->input = *iarg;
363 /* select mode */
364 if (decoder->input == 0) {
365 bt819_setbit(decoder, 0x0b, 6, 0);
366 bt819_setbit(decoder, 0x1a, 1, 1);
367 } else {
368 bt819_setbit(decoder, 0x0b, 6, 1);
369 bt819_setbit(decoder, 0x1a, 1, 0);
370 }
371 }
372 }
373 break;
374
375 case DECODER_SET_OUTPUT:
376 {
377 int *iarg = arg;
378
379 DEBUG(printk(KERN_INFO "%s-bt819: set output %x\n",
380 decoder->bus->name, *iarg));
381
382 /* not much choice of outputs */
383 if (*iarg != 0) {
384 return -EINVAL;
385 }
386 }
387 break;
388
389 case DECODER_ENABLE_OUTPUT:
390 {
391 int *iarg = arg;
392 int enable = (*iarg != 0);
393
394 DEBUG(printk
395 (KERN_INFO "%s-bt819: enable output %x\n",
396 decoder->bus->name, *iarg));
397
398 if (decoder->enable != enable) {
399 decoder->enable = enable;
400
401 if (decoder->enable) {
402 bt819_setbit(decoder, 0x16, 7, 0);
403 } else {
404 bt819_setbit(decoder, 0x16, 7, 1);
405 }
406 }
407 }
408 break;
409
410 case DECODER_SET_PICTURE:
411 {
412 struct video_picture *pic = arg;
413
414 DEBUG(printk
415 (KERN_INFO
416 "%s-bt819: set picture brightness %d contrast %d colour %d\n",
417 decoder->bus->name, pic->brightness,
418 pic->contrast, pic->colour));
419
420
421 if (decoder->bright != pic->brightness) {
422 /* We want -128 to 127 we get 0-65535 */
423 decoder->bright = pic->brightness;
424 bt819_write(decoder, 0x0a,
425 (decoder->bright >> 8) - 128);
426 }
427
428 if (decoder->contrast != pic->contrast) {
429 /* We want 0 to 511 we get 0-65535 */
430 decoder->contrast = pic->contrast;
431 bt819_write(decoder, 0x0c,
432 (decoder->
433 contrast >> 7) & 0xff);
434 bt819_setbit(decoder, 0x0b, 2,
435 ((decoder->
436 contrast >> 15) & 0x01));
437 }
438
439 if (decoder->sat != pic->colour) {
440 /* We want 0 to 511 we get 0-65535 */
441 decoder->sat = pic->colour;
442 bt819_write(decoder, 0x0d,
443 (decoder->sat >> 7) & 0xff);
444 bt819_setbit(decoder, 0x0b, 1,
445 ((decoder->
446 sat >> 15) & 0x01));
447
448 temp = (decoder->sat * 201) / 237;
449 bt819_write(decoder, 0x0e,
450 (temp >> 7) & 0xff);
451 bt819_setbit(decoder, 0x0b, 0,
452 (temp >> 15) & 0x01);
453 }
454
455 if (decoder->hue != pic->hue) {
456 /* We want -128 to 127 we get 0-65535 */
457 decoder->hue = pic->hue;
458 bt819_write(decoder, 0x0f,
459 128 - (decoder->hue >> 8));
460 }
461 }
462 break;
463
464 default:
465 return -EINVAL;
466 }
467
468 return 0;
469 }
470
471 /* ----------------------------------------------------------------------- */
472
473 static struct i2c_driver i2c_driver_bt819 = {
474 "bt819", /* name */
475 I2C_DRIVERID_VIDEODECODER, /* ID */
476 I2C_BT819, I2C_BT819 + 1,
477
478 bt819_attach,
479 bt819_detach,
480 bt819_command
481 };
482
483 EXPORT_NO_SYMBOLS;
484
bt819_setup(void)485 static int bt819_setup(void)
486 {
487 return i2c_register_driver(&i2c_driver_bt819);
488 }
489
bt819_exit(void)490 static void bt819_exit(void)
491 {
492 i2c_unregister_driver(&i2c_driver_bt819);
493 }
494
495 module_init(bt819_setup);
496 module_exit(bt819_exit);
497 MODULE_LICENSE("GPL");
498