Linux 2.6.34-rc3
[pohmelfs.git] / drivers / media / video / bt819.c
blob547e1a93c421d004f78b0adc091eb098bcece593
1 /*
2 * bt819 - BT819A VideoStream Decoder (Rockwell Part)
4 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
7 * Modifications for LML33/DC10plus unified driver
8 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
11 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
13 * This code was modify/ported from the saa7111 driver written
14 * by Dave Perks.
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.
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.
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.
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/ioctl.h>
34 #include <linux/delay.h>
35 #include <linux/i2c.h>
36 #include <linux/i2c-id.h>
37 #include <linux/videodev2.h>
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-chip-ident.h>
40 #include <media/v4l2-i2c-drv.h>
41 #include <media/bt819.h>
43 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
44 MODULE_AUTHOR("Mike Bernson & Dave Perks");
45 MODULE_LICENSE("GPL");
47 static int debug;
48 module_param(debug, int, 0);
49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
52 /* ----------------------------------------------------------------------- */
54 struct bt819 {
55 struct v4l2_subdev sd;
56 unsigned char reg[32];
58 v4l2_std_id norm;
59 int ident;
60 int input;
61 int enable;
62 int bright;
63 int contrast;
64 int hue;
65 int sat;
68 static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
70 return container_of(sd, struct bt819, sd);
73 struct timing {
74 int hactive;
75 int hdelay;
76 int vactive;
77 int vdelay;
78 int hscale;
79 int vscale;
82 /* for values, see the bt819 datasheet */
83 static struct timing timing_data[] = {
84 {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
85 {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
88 /* ----------------------------------------------------------------------- */
90 static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
92 struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
94 decoder->reg[reg] = value;
95 return i2c_smbus_write_byte_data(client, reg, value);
98 static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
100 return bt819_write(decoder, reg,
101 (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
104 static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
106 struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
107 int ret = -1;
108 u8 reg;
110 /* the bt819 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 u8 block_data[32];
115 int block_len;
117 while (len >= 2) {
118 block_len = 0;
119 block_data[block_len++] = reg = data[0];
120 do {
121 block_data[block_len++] =
122 decoder->reg[reg++] = data[1];
123 len -= 2;
124 data += 2;
125 } while (len >= 2 && data[0] == reg && block_len < 32);
126 ret = i2c_master_send(client, block_data, block_len);
127 if (ret < 0)
128 break;
130 } else {
131 /* do some slow I2C emulation kind of thing */
132 while (len >= 2) {
133 reg = *data++;
134 ret = bt819_write(decoder, reg, *data++);
135 if (ret < 0)
136 break;
137 len -= 2;
141 return ret;
144 static inline int bt819_read(struct bt819 *decoder, u8 reg)
146 struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
148 return i2c_smbus_read_byte_data(client, reg);
151 static int bt819_init(struct v4l2_subdev *sd)
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 0x00
172 chroma comb OFF, line drop scaling, interlace scaling
173 BUG? Why does turning the chroma comb on fuck up color?
174 Bug in the bt819 stepping on my board?
176 0x14, 0x00, /* 0x14 Vertial Scaling lsb */
177 0x16, 0x07, /* 0x16 Video Timing Polarity
178 ACTIVE=active low
179 FIELD: high=odd,
180 vreset=active high,
181 hreset=active high */
182 0x18, 0x68, /* 0x18 AGC Delay */
183 0x19, 0x5d, /* 0x19 Burst Gate Delay */
184 0x1a, 0x80, /* 0x1a ADC Interface */
187 struct bt819 *decoder = to_bt819(sd);
188 struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
190 init[0x03 * 2 - 1] =
191 (((timing->vdelay >> 8) & 0x03) << 6) |
192 (((timing->vactive >> 8) & 0x03) << 4) |
193 (((timing->hdelay >> 8) & 0x03) << 2) |
194 ((timing->hactive >> 8) & 0x03);
195 init[0x04 * 2 - 1] = timing->vdelay & 0xff;
196 init[0x05 * 2 - 1] = timing->vactive & 0xff;
197 init[0x06 * 2 - 1] = timing->hdelay & 0xff;
198 init[0x07 * 2 - 1] = timing->hactive & 0xff;
199 init[0x08 * 2 - 1] = timing->hscale >> 8;
200 init[0x09 * 2 - 1] = timing->hscale & 0xff;
201 /* 0x15 in array is address 0x19 */
202 init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93; /* Chroma burst delay */
203 /* reset */
204 bt819_write(decoder, 0x1f, 0x00);
205 mdelay(1);
207 /* init */
208 return bt819_write_block(decoder, init, sizeof(init));
211 /* ----------------------------------------------------------------------- */
213 static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
215 struct bt819 *decoder = to_bt819(sd);
216 int status = bt819_read(decoder, 0x00);
217 int res = V4L2_IN_ST_NO_SIGNAL;
218 v4l2_std_id std;
220 if ((status & 0x80))
221 res = 0;
223 if ((status & 0x10))
224 std = V4L2_STD_PAL;
225 else
226 std = V4L2_STD_NTSC;
227 if (pstd)
228 *pstd = std;
229 if (pstatus)
230 *pstatus = status;
232 v4l2_dbg(1, debug, sd, "get status %x\n", status);
233 return 0;
236 static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
238 return bt819_status(sd, NULL, std);
241 static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
243 return bt819_status(sd, status, NULL);
246 static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
248 struct bt819 *decoder = to_bt819(sd);
249 struct timing *timing = NULL;
251 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
253 if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
254 v4l2_err(sd, "no notify found!\n");
256 if (std & V4L2_STD_NTSC) {
257 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
258 bt819_setbit(decoder, 0x01, 0, 1);
259 bt819_setbit(decoder, 0x01, 1, 0);
260 bt819_setbit(decoder, 0x01, 5, 0);
261 bt819_write(decoder, 0x18, 0x68);
262 bt819_write(decoder, 0x19, 0x5d);
263 /* bt819_setbit(decoder, 0x1a, 5, 1); */
264 timing = &timing_data[1];
265 } else if (std & V4L2_STD_PAL) {
266 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
267 bt819_setbit(decoder, 0x01, 0, 1);
268 bt819_setbit(decoder, 0x01, 1, 1);
269 bt819_setbit(decoder, 0x01, 5, 1);
270 bt819_write(decoder, 0x18, 0x7f);
271 bt819_write(decoder, 0x19, 0x72);
272 /* bt819_setbit(decoder, 0x1a, 5, 0); */
273 timing = &timing_data[0];
274 } else {
275 v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
276 (unsigned long long)std);
277 return -EINVAL;
279 bt819_write(decoder, 0x03,
280 (((timing->vdelay >> 8) & 0x03) << 6) |
281 (((timing->vactive >> 8) & 0x03) << 4) |
282 (((timing->hdelay >> 8) & 0x03) << 2) |
283 ((timing->hactive >> 8) & 0x03));
284 bt819_write(decoder, 0x04, timing->vdelay & 0xff);
285 bt819_write(decoder, 0x05, timing->vactive & 0xff);
286 bt819_write(decoder, 0x06, timing->hdelay & 0xff);
287 bt819_write(decoder, 0x07, timing->hactive & 0xff);
288 bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
289 bt819_write(decoder, 0x09, timing->hscale & 0xff);
290 decoder->norm = std;
291 v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
292 return 0;
295 static int bt819_s_routing(struct v4l2_subdev *sd,
296 u32 input, u32 output, u32 config)
298 struct bt819 *decoder = to_bt819(sd);
300 v4l2_dbg(1, debug, sd, "set input %x\n", input);
302 if (input > 7)
303 return -EINVAL;
305 if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
306 v4l2_err(sd, "no notify found!\n");
308 if (decoder->input != input) {
309 v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
310 decoder->input = input;
311 /* select mode */
312 if (decoder->input == 0) {
313 bt819_setbit(decoder, 0x0b, 6, 0);
314 bt819_setbit(decoder, 0x1a, 1, 1);
315 } else {
316 bt819_setbit(decoder, 0x0b, 6, 1);
317 bt819_setbit(decoder, 0x1a, 1, 0);
319 v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
321 return 0;
324 static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
326 struct bt819 *decoder = to_bt819(sd);
328 v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
330 if (decoder->enable != enable) {
331 decoder->enable = enable;
332 bt819_setbit(decoder, 0x16, 7, !enable);
334 return 0;
337 static int bt819_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
339 switch (qc->id) {
340 case V4L2_CID_BRIGHTNESS:
341 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
342 break;
344 case V4L2_CID_CONTRAST:
345 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
346 break;
348 case V4L2_CID_SATURATION:
349 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
350 break;
352 case V4L2_CID_HUE:
353 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
354 break;
356 default:
357 return -EINVAL;
359 return 0;
362 static int bt819_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
364 struct bt819 *decoder = to_bt819(sd);
365 int temp;
367 switch (ctrl->id) {
368 case V4L2_CID_BRIGHTNESS:
369 if (decoder->bright == ctrl->value)
370 break;
371 decoder->bright = ctrl->value;
372 bt819_write(decoder, 0x0a, decoder->bright);
373 break;
375 case V4L2_CID_CONTRAST:
376 if (decoder->contrast == ctrl->value)
377 break;
378 decoder->contrast = ctrl->value;
379 bt819_write(decoder, 0x0c, decoder->contrast & 0xff);
380 bt819_setbit(decoder, 0x0b, 2, ((decoder->contrast >> 8) & 0x01));
381 break;
383 case V4L2_CID_SATURATION:
384 if (decoder->sat == ctrl->value)
385 break;
386 decoder->sat = ctrl->value;
387 bt819_write(decoder, 0x0d, (decoder->sat >> 7) & 0xff);
388 bt819_setbit(decoder, 0x0b, 1, ((decoder->sat >> 15) & 0x01));
390 /* Ratio between U gain and V gain must stay the same as
391 the ratio between the default U and V gain values. */
392 temp = (decoder->sat * 180) / 254;
393 bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
394 bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
395 break;
397 case V4L2_CID_HUE:
398 if (decoder->hue == ctrl->value)
399 break;
400 decoder->hue = ctrl->value;
401 bt819_write(decoder, 0x0f, decoder->hue);
402 break;
404 default:
405 return -EINVAL;
407 return 0;
410 static int bt819_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
412 struct bt819 *decoder = to_bt819(sd);
414 switch (ctrl->id) {
415 case V4L2_CID_BRIGHTNESS:
416 ctrl->value = decoder->bright;
417 break;
418 case V4L2_CID_CONTRAST:
419 ctrl->value = decoder->contrast;
420 break;
421 case V4L2_CID_SATURATION:
422 ctrl->value = decoder->sat;
423 break;
424 case V4L2_CID_HUE:
425 ctrl->value = decoder->hue;
426 break;
427 default:
428 return -EINVAL;
430 return 0;
433 static int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
435 struct bt819 *decoder = to_bt819(sd);
436 struct i2c_client *client = v4l2_get_subdevdata(sd);
438 return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
441 /* ----------------------------------------------------------------------- */
443 static const struct v4l2_subdev_core_ops bt819_core_ops = {
444 .g_chip_ident = bt819_g_chip_ident,
445 .g_ctrl = bt819_g_ctrl,
446 .s_ctrl = bt819_s_ctrl,
447 .queryctrl = bt819_queryctrl,
448 .s_std = bt819_s_std,
451 static const struct v4l2_subdev_video_ops bt819_video_ops = {
452 .s_routing = bt819_s_routing,
453 .s_stream = bt819_s_stream,
454 .querystd = bt819_querystd,
455 .g_input_status = bt819_g_input_status,
458 static const struct v4l2_subdev_ops bt819_ops = {
459 .core = &bt819_core_ops,
460 .video = &bt819_video_ops,
463 /* ----------------------------------------------------------------------- */
465 static int bt819_probe(struct i2c_client *client,
466 const struct i2c_device_id *id)
468 int i, ver;
469 struct bt819 *decoder;
470 struct v4l2_subdev *sd;
471 const char *name;
473 /* Check if the adapter supports the needed features */
474 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
475 return -ENODEV;
477 decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
478 if (decoder == NULL)
479 return -ENOMEM;
480 sd = &decoder->sd;
481 v4l2_i2c_subdev_init(sd, client, &bt819_ops);
483 ver = bt819_read(decoder, 0x17);
484 switch (ver & 0xf0) {
485 case 0x70:
486 name = "bt819a";
487 decoder->ident = V4L2_IDENT_BT819A;
488 break;
489 case 0x60:
490 name = "bt817a";
491 decoder->ident = V4L2_IDENT_BT817A;
492 break;
493 case 0x20:
494 name = "bt815a";
495 decoder->ident = V4L2_IDENT_BT815A;
496 break;
497 default:
498 v4l2_dbg(1, debug, sd,
499 "unknown chip version 0x%02x\n", ver);
500 return -ENODEV;
503 v4l_info(client, "%s found @ 0x%x (%s)\n", name,
504 client->addr << 1, client->adapter->name);
506 decoder->norm = V4L2_STD_NTSC;
507 decoder->input = 0;
508 decoder->enable = 1;
509 decoder->bright = 0;
510 decoder->contrast = 0xd8; /* 100% of original signal */
511 decoder->hue = 0;
512 decoder->sat = 0xfe; /* 100% of original signal */
514 i = bt819_init(sd);
515 if (i < 0)
516 v4l2_dbg(1, debug, sd, "init status %d\n", i);
517 return 0;
520 static int bt819_remove(struct i2c_client *client)
522 struct v4l2_subdev *sd = i2c_get_clientdata(client);
524 v4l2_device_unregister_subdev(sd);
525 kfree(to_bt819(sd));
526 return 0;
529 /* ----------------------------------------------------------------------- */
531 static const struct i2c_device_id bt819_id[] = {
532 { "bt819a", 0 },
533 { "bt817a", 0 },
534 { "bt815a", 0 },
537 MODULE_DEVICE_TABLE(i2c, bt819_id);
539 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
540 .name = "bt819",
541 .probe = bt819_probe,
542 .remove = bt819_remove,
543 .id_table = bt819_id,