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 & V4L2_STD_525_60) ? 1 : 0];
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 & V4L2_STD_625_50) ? 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;
218 case VIDIOC_INT_INIT:
219 /* This is just for testing!!! */
223 case VIDIOC_QUERYSTD:
224 case VIDIOC_INT_G_INPUT_STATUS: {
226 v4l2_std_id *istd = arg;
228 int res = V4L2_IN_ST_NO_SIGNAL;
231 status = bt819_read(client, 0x00);
239 if (cmd == VIDIOC_QUERYSTD)
244 v4l_dbg(1, debug, client, "get status %x\n", *iarg);
250 v4l2_std_id *iarg = arg;
251 struct timing *timing = NULL;
253 v4l_dbg(1, debug, client, "set norm %llx\n", *iarg);
255 if (*iarg & V4L2_STD_NTSC) {
256 bt819_setbit(client, 0x01, 0, 1);
257 bt819_setbit(client, 0x01, 1, 0);
258 bt819_setbit(client, 0x01, 5, 0);
259 bt819_write(client, 0x18, 0x68);
260 bt819_write(client, 0x19, 0x5d);
261 /* bt819_setbit(client, 0x1a, 5, 1); */
262 timing = &timing_data[1];
263 } else if (*iarg & V4L2_STD_PAL) {
264 bt819_setbit(client, 0x01, 0, 1);
265 bt819_setbit(client, 0x01, 1, 1);
266 bt819_setbit(client, 0x01, 5, 1);
267 bt819_write(client, 0x18, 0x7f);
268 bt819_write(client, 0x19, 0x72);
269 /* bt819_setbit(client, 0x1a, 5, 0); */
270 timing = &timing_data[0];
272 v4l_dbg(1, debug, client, "unsupported norm %llx\n", *iarg);
275 /* case VIDEO_MODE_AUTO:
276 bt819_setbit(client, 0x01, 0, 0);
277 bt819_setbit(client, 0x01, 1, 0);*/
279 bt819_write(client, 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(client, 0x04, timing->vdelay & 0xff);
285 bt819_write(client, 0x05, timing->vactive & 0xff);
286 bt819_write(client, 0x06, timing->hdelay & 0xff);
287 bt819_write(client, 0x07, timing->hactive & 0xff);
288 bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
289 bt819_write(client, 0x09, timing->hscale & 0xff);
290 decoder->norm = *iarg;
294 case VIDIOC_INT_S_VIDEO_ROUTING:
296 struct v4l2_routing *route = arg;
298 v4l_dbg(1, debug, client, "set input %x\n", route->input);
300 if (route->input < 0 || route->input > 7)
303 if (decoder->input != route->input) {
304 decoder->input = route->input;
306 if (decoder->input == 0) {
307 bt819_setbit(client, 0x0b, 6, 0);
308 bt819_setbit(client, 0x1a, 1, 1);
310 bt819_setbit(client, 0x0b, 6, 1);
311 bt819_setbit(client, 0x1a, 1, 0);
317 case VIDIOC_STREAMON:
318 case VIDIOC_STREAMOFF:
320 int enable = cmd == VIDIOC_STREAMON;
322 v4l_dbg(1, debug, client, "enable output %x\n", enable);
324 if (decoder->enable != enable) {
325 decoder->enable = enable;
326 bt819_setbit(client, 0x16, 7, !enable);
331 case VIDIOC_QUERYCTRL:
333 struct v4l2_queryctrl *qc = arg;
336 case V4L2_CID_BRIGHTNESS:
337 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
340 case V4L2_CID_CONTRAST:
341 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
344 case V4L2_CID_SATURATION:
345 v4l2_ctrl_query_fill(qc, 0, 511, 1, 256);
349 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
360 struct v4l2_control *ctrl = arg;
363 case V4L2_CID_BRIGHTNESS:
364 if (decoder->bright != ctrl->value) {
365 decoder->bright = ctrl->value;
366 bt819_write(client, 0x0a, decoder->bright);
370 case V4L2_CID_CONTRAST:
371 if (decoder->contrast != ctrl->value) {
372 decoder->contrast = ctrl->value;
373 bt819_write(client, 0x0c,
374 decoder->contrast & 0xff);
375 bt819_setbit(client, 0x0b, 2,
376 ((decoder->contrast >> 8) & 0x01));
380 case V4L2_CID_SATURATION:
381 if (decoder->sat != ctrl->value) {
382 decoder->sat = ctrl->value;
383 bt819_write(client, 0x0d,
384 (decoder->sat >> 7) & 0xff);
385 bt819_setbit(client, 0x0b, 1,
386 ((decoder->sat >> 15) & 0x01));
388 /* Ratio between U gain and V gain must stay the same as
389 the ratio between the default U and V gain values. */
390 temp = (decoder->sat * 180) / 254;
391 bt819_write(client, 0x0e, (temp >> 7) & 0xff);
392 bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
397 if (decoder->hue != ctrl->value) {
398 decoder->hue = ctrl->value;
399 bt819_write(client, 0x0f, decoder->hue);
410 struct v4l2_control *ctrl = arg;
413 case V4L2_CID_BRIGHTNESS:
414 ctrl->value = decoder->bright;
416 case V4L2_CID_CONTRAST:
417 ctrl->value = decoder->contrast;
419 case V4L2_CID_SATURATION:
420 ctrl->value = decoder->sat;
423 ctrl->value = decoder->hue;
438 /* ----------------------------------------------------------------------- */
440 static unsigned short normal_i2c[] = { 0x8a >> 1, I2C_CLIENT_END };
444 static int bt819_probe(struct i2c_client *client,
445 const struct i2c_device_id *id)
448 struct bt819 *decoder;
451 /* Check if the adapter supports the needed features */
452 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
455 ver = bt819_read(client, 0x17);
456 switch (ver & 0xf0) {
467 v4l_dbg(1, debug, client,
468 "unknown chip version 0x%02x\n", ver);
472 v4l_info(client, "%s found @ 0x%x (%s)\n", name,
473 client->addr << 1, client->adapter->name);
475 decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
478 decoder->norm = V4L2_STD_NTSC;
482 decoder->contrast = 0xd8; /* 100% of original signal */
484 decoder->sat = 0xfe; /* 100% of original signal */
485 decoder->initialized = 0;
486 i2c_set_clientdata(client, decoder);
488 i = bt819_init(client);
490 v4l_dbg(1, debug, client, "init status %d\n", i);
494 static int bt819_remove(struct i2c_client *client)
496 kfree(i2c_get_clientdata(client));
500 /* ----------------------------------------------------------------------- */
502 static const struct i2c_device_id bt819_id[] = {
508 MODULE_DEVICE_TABLE(i2c, bt819_id);
510 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
512 .driverid = I2C_DRIVERID_BT819,
513 .command = bt819_command,
514 .probe = bt819_probe,
515 .remove = bt819_remove,
516 .id_table = bt819_id,