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
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/delay.h>
33 #include <linux/types.h>
34 #include <linux/ioctl.h>
35 #include <asm/uaccess.h>
36 #include <linux/i2c.h>
37 #include <linux/i2c-id.h>
38 #include <linux/videodev.h>
39 #include <linux/video_decoder.h>
40 #include <media/v4l2-common.h>
41 #include <media/v4l2-i2c-drv-legacy.h>
43 MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
44 MODULE_AUTHOR("Mike Bernson & Dave Perks");
45 MODULE_LICENSE("GPL");
48 module_param(debug, int, 0);
49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
51 /* ----------------------------------------------------------------------- */
54 unsigned char reg[32];
75 /* for values, see the bt819 datasheet */
76 static struct timing timing_data[] = {
77 {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
78 {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
81 /* ----------------------------------------------------------------------- */
83 static inline int bt819_write(struct i2c_client *client, u8 reg, u8 value)
85 struct bt819 *decoder = i2c_get_clientdata(client);
87 decoder->reg[reg] = value;
88 return i2c_smbus_write_byte_data(client, reg, value);
91 static inline int bt819_setbit(struct i2c_client *client, u8 reg, u8 bit, u8 value)
93 struct bt819 *decoder = i2c_get_clientdata(client);
95 return bt819_write(client, reg,
96 (decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
99 static int bt819_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
104 /* the bt819 has an autoincrement function, use it if
105 * the adapter understands raw I2C */
106 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
107 /* do raw I2C, not smbus compatible */
108 struct bt819 *decoder = i2c_get_clientdata(client);
114 block_data[block_len++] = reg = data[0];
116 block_data[block_len++] =
117 decoder->reg[reg++] = data[1];
120 } while (len >= 2 && data[0] == reg && block_len < 32);
121 ret = i2c_master_send(client, block_data, block_len);
126 /* do some slow I2C emulation kind of thing */
129 if ((ret = bt819_write(client, reg, *data++)) < 0)
138 static inline int bt819_read(struct i2c_client *client, u8 reg)
140 return i2c_smbus_read_byte_data(client, reg);
143 static int bt819_init(struct i2c_client *client)
145 struct bt819 *decoder = i2c_get_clientdata(client);
147 static unsigned char init[] = {
148 /*0x1f, 0x00,*/ /* Reset */
149 0x01, 0x59, /* 0x01 input format */
150 0x02, 0x00, /* 0x02 temporal decimation */
151 0x03, 0x12, /* 0x03 Cropping msb */
152 0x04, 0x16, /* 0x04 Vertical Delay, lsb */
153 0x05, 0xe0, /* 0x05 Vertical Active lsb */
154 0x06, 0x80, /* 0x06 Horizontal Delay lsb */
155 0x07, 0xd0, /* 0x07 Horizontal Active lsb */
156 0x08, 0x00, /* 0x08 Horizontal Scaling msb */
157 0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
158 0x0a, 0x00, /* 0x0a Brightness control */
159 0x0b, 0x30, /* 0x0b Miscellaneous control */
160 0x0c, 0xd8, /* 0x0c Luma Gain lsb */
161 0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
162 0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
163 0x0f, 0x00, /* 0x0f Hue control */
164 0x12, 0x04, /* 0x12 Output Format */
165 0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00
166 chroma comb OFF, line drop scaling, interlace scaling
167 BUG? Why does turning the chroma comb on fuck up color?
168 Bug in the bt819 stepping on my board?
170 0x14, 0x00, /* 0x14 Vertial Scaling lsb */
171 0x16, 0x07, /* 0x16 Video Timing Polarity
175 hreset=active high */
176 0x18, 0x68, /* 0x18 AGC Delay */
177 0x19, 0x5d, /* 0x19 Burst Gate Delay */
178 0x1a, 0x80, /* 0x1a ADC Interface */
181 struct timing *timing = &timing_data[decoder->norm];
184 (((timing->vdelay >> 8) & 0x03) << 6) |
185 (((timing->vactive >> 8) & 0x03) << 4) |
186 (((timing->hdelay >> 8) & 0x03) << 2) |
187 ((timing->hactive >> 8) & 0x03);
188 init[0x04 * 2 - 1] = timing->vdelay & 0xff;
189 init[0x05 * 2 - 1] = timing->vactive & 0xff;
190 init[0x06 * 2 - 1] = timing->hdelay & 0xff;
191 init[0x07 * 2 - 1] = timing->hactive & 0xff;
192 init[0x08 * 2 - 1] = timing->hscale >> 8;
193 init[0x09 * 2 - 1] = timing->hscale & 0xff;
194 /* 0x15 in array is address 0x19 */
195 init[0x15 * 2 - 1] = (decoder->norm == 0) ? 115 : 93; /* Chroma burst delay */
197 bt819_write(client, 0x1f, 0x00);
201 return bt819_write_block(client, init, sizeof(init));
204 /* ----------------------------------------------------------------------- */
206 static int bt819_command(struct i2c_client *client, unsigned cmd, void *arg)
210 struct bt819 *decoder = i2c_get_clientdata(client);
212 if (!decoder->initialized) { /* First call to bt819_init could be */
213 bt819_init(client); /* without #FRST = 0 */
214 decoder->initialized = 1;
219 /* This is just for testing!!! */
223 case DECODER_GET_CAPABILITIES:
225 struct video_decoder_capability *cap = arg;
227 cap->flags = VIDEO_DECODER_PAL |
236 case DECODER_GET_STATUS:
242 status = bt819_read(client, 0x00);
245 res |= DECODER_STATUS_GOOD;
247 switch (decoder->norm) {
248 case VIDEO_MODE_NTSC:
249 res |= DECODER_STATUS_NTSC;
252 res |= DECODER_STATUS_PAL;
255 case VIDEO_MODE_AUTO:
257 res |= DECODER_STATUS_PAL;
259 res |= DECODER_STATUS_NTSC;
262 res |= DECODER_STATUS_COLOR;
265 v4l_dbg(1, debug, client, "get status %x\n", *iarg);
269 case DECODER_SET_NORM:
272 struct timing *timing = NULL;
274 v4l_dbg(1, debug, client, "set norm %x\n", *iarg);
277 case VIDEO_MODE_NTSC:
278 bt819_setbit(client, 0x01, 0, 1);
279 bt819_setbit(client, 0x01, 1, 0);
280 bt819_setbit(client, 0x01, 5, 0);
281 bt819_write(client, 0x18, 0x68);
282 bt819_write(client, 0x19, 0x5d);
283 /* bt819_setbit(client, 0x1a, 5, 1); */
284 timing = &timing_data[VIDEO_MODE_NTSC];
287 bt819_setbit(client, 0x01, 0, 1);
288 bt819_setbit(client, 0x01, 1, 1);
289 bt819_setbit(client, 0x01, 5, 1);
290 bt819_write(client, 0x18, 0x7f);
291 bt819_write(client, 0x19, 0x72);
292 /* bt819_setbit(client, 0x1a, 5, 0); */
293 timing = &timing_data[VIDEO_MODE_PAL];
295 case VIDEO_MODE_AUTO:
296 bt819_setbit(client, 0x01, 0, 0);
297 bt819_setbit(client, 0x01, 1, 0);
300 v4l_dbg(1, debug, client, "unsupported norm %x\n", *iarg);
305 bt819_write(client, 0x03,
306 (((timing->vdelay >> 8) & 0x03) << 6) |
307 (((timing->vactive >> 8) & 0x03) << 4) |
308 (((timing->hdelay >> 8) & 0x03) << 2) |
309 ((timing->hactive >> 8) & 0x03) );
310 bt819_write(client, 0x04, timing->vdelay & 0xff);
311 bt819_write(client, 0x05, timing->vactive & 0xff);
312 bt819_write(client, 0x06, timing->hdelay & 0xff);
313 bt819_write(client, 0x07, timing->hactive & 0xff);
314 bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
315 bt819_write(client, 0x09, timing->hscale & 0xff);
318 decoder->norm = *iarg;
322 case DECODER_SET_INPUT:
326 v4l_dbg(1, debug, client, "set input %x\n", *iarg);
328 if (*iarg < 0 || *iarg > 7)
331 if (decoder->input != *iarg) {
332 decoder->input = *iarg;
334 if (decoder->input == 0) {
335 bt819_setbit(client, 0x0b, 6, 0);
336 bt819_setbit(client, 0x1a, 1, 1);
338 bt819_setbit(client, 0x0b, 6, 1);
339 bt819_setbit(client, 0x1a, 1, 0);
345 case DECODER_SET_OUTPUT:
349 v4l_dbg(1, debug, client, "set output %x\n", *iarg);
351 /* not much choice of outputs */
357 case DECODER_ENABLE_OUTPUT:
360 int enable = (*iarg != 0);
362 v4l_dbg(1, debug, client, "enable output %x\n", *iarg);
364 if (decoder->enable != enable) {
365 decoder->enable = enable;
366 bt819_setbit(client, 0x16, 7, !enable);
371 case DECODER_SET_PICTURE:
373 struct video_picture *pic = arg;
375 v4l_dbg(1, debug, client,
376 "set picture brightness %d contrast %d colour %d\n",
377 pic->brightness, pic->contrast, pic->colour);
380 if (decoder->bright != pic->brightness) {
381 /* We want -128 to 127 we get 0-65535 */
382 decoder->bright = pic->brightness;
383 bt819_write(client, 0x0a,
384 (decoder->bright >> 8) - 128);
387 if (decoder->contrast != pic->contrast) {
388 /* We want 0 to 511 we get 0-65535 */
389 decoder->contrast = pic->contrast;
390 bt819_write(client, 0x0c,
391 (decoder->contrast >> 7) & 0xff);
392 bt819_setbit(client, 0x0b, 2,
393 ((decoder->contrast >> 15) & 0x01));
396 if (decoder->sat != pic->colour) {
397 /* We want 0 to 511 we get 0-65535 */
398 decoder->sat = pic->colour;
399 bt819_write(client, 0x0d,
400 (decoder->sat >> 7) & 0xff);
401 bt819_setbit(client, 0x0b, 1,
402 ((decoder->sat >> 15) & 0x01));
404 temp = (decoder->sat * 201) / 237;
405 bt819_write(client, 0x0e, (temp >> 7) & 0xff);
406 bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
409 if (decoder->hue != pic->hue) {
410 /* We want -128 to 127 we get 0-65535 */
411 decoder->hue = pic->hue;
412 bt819_write(client, 0x0f,
413 128 - (decoder->hue >> 8));
425 /* ----------------------------------------------------------------------- */
427 static unsigned short normal_i2c[] = { 0x8a >> 1, I2C_CLIENT_END };
431 static int bt819_probe(struct i2c_client *client,
432 const struct i2c_device_id *id)
435 struct bt819 *decoder;
438 /* Check if the adapter supports the needed features */
439 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
442 ver = bt819_read(client, 0x17);
443 switch (ver & 0xf0) {
454 v4l_dbg(1, debug, client,
455 "unknown chip version 0x%02x\n", ver);
459 v4l_info(client, "%s found @ 0x%x (%s)\n", name,
460 client->addr << 1, client->adapter->name);
462 decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
465 decoder->norm = VIDEO_MODE_NTSC;
468 decoder->bright = 32768;
469 decoder->contrast = 32768;
470 decoder->hue = 32768;
471 decoder->sat = 32768;
472 decoder->initialized = 0;
473 i2c_set_clientdata(client, decoder);
475 i = bt819_init(client);
477 v4l_dbg(1, debug, client, "init status %d\n", i);
481 static int bt819_remove(struct i2c_client *client)
483 kfree(i2c_get_clientdata(client));
487 /* ----------------------------------------------------------------------- */
489 static const struct i2c_device_id bt819_id[] = {
495 MODULE_DEVICE_TABLE(i2c, bt819_id);
497 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
499 .driverid = I2C_DRIVERID_BT819,
500 .command = bt819_command,
501 .probe = bt819_probe,
502 .remove = bt819_remove,
503 .id_table = bt819_id,