1 /*
2 * adv7175 - adv7175a video encoder driver version 0.0.3
3 *
4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
6 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
7 * - some corrections for Pinnacle Systems Inc. DC10plus card.
8 *
9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 */
22
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <linux/ioctl.h>
27 #include <linux/uaccess.h>
28 #include <linux/i2c.h>
29 #include <linux/videodev2.h>
30 #include <media/v4l2-device.h>
31
32 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
33 MODULE_AUTHOR("Dave Perks");
34 MODULE_LICENSE("GPL");
35
36 #define I2C_ADV7175 0xd4
37 #define I2C_ADV7176 0x54
38
39
40 static int debug;
41 module_param(debug, int, 0);
42 MODULE_PARM_DESC(debug, "Debug level (0-1)");
43
44 /* ----------------------------------------------------------------------- */
45
46 struct adv7175 {
47 struct v4l2_subdev sd;
48 v4l2_std_id norm;
49 int input;
50 };
51
to_adv7175(struct v4l2_subdev * sd)52 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
53 {
54 return container_of(sd, struct adv7175, sd);
55 }
56
57 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
58
59 static u32 adv7175_codes[] = {
60 MEDIA_BUS_FMT_UYVY8_2X8,
61 MEDIA_BUS_FMT_UYVY8_1X16,
62 };
63
64 /* ----------------------------------------------------------------------- */
65
adv7175_write(struct v4l2_subdev * sd,u8 reg,u8 value)66 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
67 {
68 struct i2c_client *client = v4l2_get_subdevdata(sd);
69
70 return i2c_smbus_write_byte_data(client, reg, value);
71 }
72
adv7175_read(struct v4l2_subdev * sd,u8 reg)73 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
74 {
75 struct i2c_client *client = v4l2_get_subdevdata(sd);
76
77 return i2c_smbus_read_byte_data(client, reg);
78 }
79
adv7175_write_block(struct v4l2_subdev * sd,const u8 * data,unsigned int len)80 static int adv7175_write_block(struct v4l2_subdev *sd,
81 const u8 *data, unsigned int len)
82 {
83 struct i2c_client *client = v4l2_get_subdevdata(sd);
84 int ret = -1;
85 u8 reg;
86
87 /* the adv7175 has an autoincrement function, use it if
88 * the adapter understands raw I2C */
89 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
90 /* do raw I2C, not smbus compatible */
91 u8 block_data[32];
92 int block_len;
93
94 while (len >= 2) {
95 block_len = 0;
96 block_data[block_len++] = reg = data[0];
97 do {
98 block_data[block_len++] = data[1];
99 reg++;
100 len -= 2;
101 data += 2;
102 } while (len >= 2 && data[0] == reg && block_len < 32);
103 ret = i2c_master_send(client, block_data, block_len);
104 if (ret < 0)
105 break;
106 }
107 } else {
108 /* do some slow I2C emulation kind of thing */
109 while (len >= 2) {
110 reg = *data++;
111 ret = adv7175_write(sd, reg, *data++);
112 if (ret < 0)
113 break;
114 len -= 2;
115 }
116 }
117
118 return ret;
119 }
120
set_subcarrier_freq(struct v4l2_subdev * sd,int pass_through)121 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
122 {
123 /* for some reason pass_through NTSC needs
124 * a different sub-carrier freq to remain stable. */
125 if (pass_through)
126 adv7175_write(sd, 0x02, 0x00);
127 else
128 adv7175_write(sd, 0x02, 0x55);
129
130 adv7175_write(sd, 0x03, 0x55);
131 adv7175_write(sd, 0x04, 0x55);
132 adv7175_write(sd, 0x05, 0x25);
133 }
134
135 /* ----------------------------------------------------------------------- */
136 /* Output filter: S-Video Composite */
137
138 #define MR050 0x11 /* 0x09 */
139 #define MR060 0x14 /* 0x0c */
140
141 /* ----------------------------------------------------------------------- */
142
143 #define TR0MODE 0x46
144 #define TR0RST 0x80
145
146 #define TR1CAPT 0x80
147 #define TR1PLAY 0x00
148
149 static const unsigned char init_common[] = {
150
151 0x00, MR050, /* MR0, PAL enabled */
152 0x01, 0x00, /* MR1 */
153 0x02, 0x0c, /* subc. freq. */
154 0x03, 0x8c, /* subc. freq. */
155 0x04, 0x79, /* subc. freq. */
156 0x05, 0x26, /* subc. freq. */
157 0x06, 0x40, /* subc. phase */
158
159 0x07, TR0MODE, /* TR0, 16bit */
160 0x08, 0x21, /* */
161 0x09, 0x00, /* */
162 0x0a, 0x00, /* */
163 0x0b, 0x00, /* */
164 0x0c, TR1CAPT, /* TR1 */
165 0x0d, 0x4f, /* MR2 */
166 0x0e, 0x00, /* */
167 0x0f, 0x00, /* */
168 0x10, 0x00, /* */
169 0x11, 0x00, /* */
170 };
171
172 static const unsigned char init_pal[] = {
173 0x00, MR050, /* MR0, PAL enabled */
174 0x01, 0x00, /* MR1 */
175 0x02, 0x0c, /* subc. freq. */
176 0x03, 0x8c, /* subc. freq. */
177 0x04, 0x79, /* subc. freq. */
178 0x05, 0x26, /* subc. freq. */
179 0x06, 0x40, /* subc. phase */
180 };
181
182 static const unsigned char init_ntsc[] = {
183 0x00, MR060, /* MR0, NTSC enabled */
184 0x01, 0x00, /* MR1 */
185 0x02, 0x55, /* subc. freq. */
186 0x03, 0x55, /* subc. freq. */
187 0x04, 0x55, /* subc. freq. */
188 0x05, 0x25, /* subc. freq. */
189 0x06, 0x1a, /* subc. phase */
190 };
191
adv7175_init(struct v4l2_subdev * sd,u32 val)192 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
193 {
194 /* This is just for testing!!! */
195 adv7175_write_block(sd, init_common, sizeof(init_common));
196 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
197 adv7175_write(sd, 0x07, TR0MODE);
198 return 0;
199 }
200
adv7175_s_std_output(struct v4l2_subdev * sd,v4l2_std_id std)201 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
202 {
203 struct adv7175 *encoder = to_adv7175(sd);
204
205 if (std & V4L2_STD_NTSC) {
206 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
207 if (encoder->input == 0)
208 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
209 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
210 adv7175_write(sd, 0x07, TR0MODE);
211 } else if (std & V4L2_STD_PAL) {
212 adv7175_write_block(sd, init_pal, sizeof(init_pal));
213 if (encoder->input == 0)
214 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
215 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
216 adv7175_write(sd, 0x07, TR0MODE);
217 } else if (std & V4L2_STD_SECAM) {
218 /* This is an attempt to convert
219 * SECAM->PAL (typically it does not work
220 * due to genlock: when decoder is in SECAM
221 * and encoder in in PAL the subcarrier can
222 * not be syncronized with horizontal
223 * quency) */
224 adv7175_write_block(sd, init_pal, sizeof(init_pal));
225 if (encoder->input == 0)
226 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
227 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
228 adv7175_write(sd, 0x07, TR0MODE);
229 } else {
230 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
231 (unsigned long long)std);
232 return -EINVAL;
233 }
234 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
235 encoder->norm = std;
236 return 0;
237 }
238
adv7175_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)239 static int adv7175_s_routing(struct v4l2_subdev *sd,
240 u32 input, u32 output, u32 config)
241 {
242 struct adv7175 *encoder = to_adv7175(sd);
243
244 /* RJ: input = 0: input is from decoder
245 input = 1: input is from ZR36060
246 input = 2: color bar */
247
248 switch (input) {
249 case 0:
250 adv7175_write(sd, 0x01, 0x00);
251
252 if (encoder->norm & V4L2_STD_NTSC)
253 set_subcarrier_freq(sd, 1);
254
255 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
256 if (encoder->norm & V4L2_STD_SECAM)
257 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
258 else
259 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
260 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
261 adv7175_write(sd, 0x07, TR0MODE);
262 /*udelay(10);*/
263 break;
264
265 case 1:
266 adv7175_write(sd, 0x01, 0x00);
267
268 if (encoder->norm & V4L2_STD_NTSC)
269 set_subcarrier_freq(sd, 0);
270
271 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
272 adv7175_write(sd, 0x0d, 0x49);
273 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
274 adv7175_write(sd, 0x07, TR0MODE);
275 /* udelay(10); */
276 break;
277
278 case 2:
279 adv7175_write(sd, 0x01, 0x80);
280
281 if (encoder->norm & V4L2_STD_NTSC)
282 set_subcarrier_freq(sd, 0);
283
284 adv7175_write(sd, 0x0d, 0x49);
285 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
286 adv7175_write(sd, 0x07, TR0MODE);
287 /* udelay(10); */
288 break;
289
290 default:
291 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
292 return -EINVAL;
293 }
294 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
295 encoder->input = input;
296 return 0;
297 }
298
adv7175_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)299 static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
300 struct v4l2_subdev_pad_config *cfg,
301 struct v4l2_subdev_mbus_code_enum *code)
302 {
303 if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
304 return -EINVAL;
305
306 code->code = adv7175_codes[code->index];
307 return 0;
308 }
309
adv7175_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)310 static int adv7175_get_fmt(struct v4l2_subdev *sd,
311 struct v4l2_subdev_pad_config *cfg,
312 struct v4l2_subdev_format *format)
313 {
314 struct v4l2_mbus_framefmt *mf = &format->format;
315 u8 val = adv7175_read(sd, 0x7);
316
317 if (format->pad)
318 return -EINVAL;
319
320 if ((val & 0x40) == (1 << 6))
321 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
322 else
323 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
324
325 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
326 mf->width = 0;
327 mf->height = 0;
328 mf->field = V4L2_FIELD_ANY;
329
330 return 0;
331 }
332
adv7175_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)333 static int adv7175_set_fmt(struct v4l2_subdev *sd,
334 struct v4l2_subdev_pad_config *cfg,
335 struct v4l2_subdev_format *format)
336 {
337 struct v4l2_mbus_framefmt *mf = &format->format;
338 u8 val = adv7175_read(sd, 0x7);
339 int ret = 0;
340
341 if (format->pad)
342 return -EINVAL;
343
344 switch (mf->code) {
345 case MEDIA_BUS_FMT_UYVY8_2X8:
346 val &= ~0x40;
347 break;
348
349 case MEDIA_BUS_FMT_UYVY8_1X16:
350 val |= 0x40;
351 break;
352
353 default:
354 v4l2_dbg(1, debug, sd,
355 "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
356 return -EINVAL;
357 }
358
359 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
360 ret = adv7175_write(sd, 0x7, val);
361
362 return ret;
363 }
364
adv7175_s_power(struct v4l2_subdev * sd,int on)365 static int adv7175_s_power(struct v4l2_subdev *sd, int on)
366 {
367 if (on)
368 adv7175_write(sd, 0x01, 0x00);
369 else
370 adv7175_write(sd, 0x01, 0x78);
371
372 return 0;
373 }
374
375 /* ----------------------------------------------------------------------- */
376
377 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
378 .init = adv7175_init,
379 .s_power = adv7175_s_power,
380 };
381
382 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
383 .s_std_output = adv7175_s_std_output,
384 .s_routing = adv7175_s_routing,
385 };
386
387 static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
388 .enum_mbus_code = adv7175_enum_mbus_code,
389 .get_fmt = adv7175_get_fmt,
390 .set_fmt = adv7175_set_fmt,
391 };
392
393 static const struct v4l2_subdev_ops adv7175_ops = {
394 .core = &adv7175_core_ops,
395 .video = &adv7175_video_ops,
396 .pad = &adv7175_pad_ops,
397 };
398
399 /* ----------------------------------------------------------------------- */
400
adv7175_probe(struct i2c_client * client,const struct i2c_device_id * id)401 static int adv7175_probe(struct i2c_client *client,
402 const struct i2c_device_id *id)
403 {
404 int i;
405 struct adv7175 *encoder;
406 struct v4l2_subdev *sd;
407
408 /* Check if the adapter supports the needed features */
409 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
410 return -ENODEV;
411
412 v4l_info(client, "chip found @ 0x%x (%s)\n",
413 client->addr << 1, client->adapter->name);
414
415 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
416 if (encoder == NULL)
417 return -ENOMEM;
418 sd = &encoder->sd;
419 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
420 encoder->norm = V4L2_STD_NTSC;
421 encoder->input = 0;
422
423 i = adv7175_write_block(sd, init_common, sizeof(init_common));
424 if (i >= 0) {
425 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
426 i = adv7175_write(sd, 0x07, TR0MODE);
427 i = adv7175_read(sd, 0x12);
428 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
429 }
430 if (i < 0)
431 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
432 return 0;
433 }
434
adv7175_remove(struct i2c_client * client)435 static int adv7175_remove(struct i2c_client *client)
436 {
437 struct v4l2_subdev *sd = i2c_get_clientdata(client);
438
439 v4l2_device_unregister_subdev(sd);
440 return 0;
441 }
442
443 /* ----------------------------------------------------------------------- */
444
445 static const struct i2c_device_id adv7175_id[] = {
446 { "adv7175", 0 },
447 { "adv7176", 0 },
448 { }
449 };
450 MODULE_DEVICE_TABLE(i2c, adv7175_id);
451
452 static struct i2c_driver adv7175_driver = {
453 .driver = {
454 .name = "adv7175",
455 },
456 .probe = adv7175_probe,
457 .remove = adv7175_remove,
458 .id_table = adv7175_id,
459 };
460
461 module_i2c_driver(adv7175_driver);
462
