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 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <linux/ioctl.h>
31 #include <asm/uaccess.h>
32 #include <linux/i2c.h>
33 #include <linux/videodev2.h>
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-chip-ident.h>
36
37 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
38 MODULE_AUTHOR("Dave Perks");
39 MODULE_LICENSE("GPL");
40
41 #define I2C_ADV7175 0xd4
42 #define I2C_ADV7176 0x54
43
44
45 static int debug;
46 module_param(debug, int, 0);
47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
48
49 /* ----------------------------------------------------------------------- */
50
51 struct adv7175 {
52 struct v4l2_subdev sd;
53 v4l2_std_id norm;
54 int input;
55 };
56
to_adv7175(struct v4l2_subdev * sd)57 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
58 {
59 return container_of(sd, struct adv7175, sd);
60 }
61
62 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
63
64 static enum v4l2_mbus_pixelcode adv7175_codes[] = {
65 V4L2_MBUS_FMT_UYVY8_2X8,
66 V4L2_MBUS_FMT_UYVY8_1X16,
67 };
68
69 /* ----------------------------------------------------------------------- */
70
adv7175_write(struct v4l2_subdev * sd,u8 reg,u8 value)71 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
72 {
73 struct i2c_client *client = v4l2_get_subdevdata(sd);
74
75 return i2c_smbus_write_byte_data(client, reg, value);
76 }
77
adv7175_read(struct v4l2_subdev * sd,u8 reg)78 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
79 {
80 struct i2c_client *client = v4l2_get_subdevdata(sd);
81
82 return i2c_smbus_read_byte_data(client, reg);
83 }
84
adv7175_write_block(struct v4l2_subdev * sd,const u8 * data,unsigned int len)85 static int adv7175_write_block(struct v4l2_subdev *sd,
86 const u8 *data, unsigned int len)
87 {
88 struct i2c_client *client = v4l2_get_subdevdata(sd);
89 int ret = -1;
90 u8 reg;
91
92 /* the adv7175 has an autoincrement function, use it if
93 * the adapter understands raw I2C */
94 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
95 /* do raw I2C, not smbus compatible */
96 u8 block_data[32];
97 int block_len;
98
99 while (len >= 2) {
100 block_len = 0;
101 block_data[block_len++] = reg = data[0];
102 do {
103 block_data[block_len++] = data[1];
104 reg++;
105 len -= 2;
106 data += 2;
107 } while (len >= 2 && data[0] == reg && block_len < 32);
108 ret = i2c_master_send(client, block_data, block_len);
109 if (ret < 0)
110 break;
111 }
112 } else {
113 /* do some slow I2C emulation kind of thing */
114 while (len >= 2) {
115 reg = *data++;
116 ret = adv7175_write(sd, reg, *data++);
117 if (ret < 0)
118 break;
119 len -= 2;
120 }
121 }
122
123 return ret;
124 }
125
set_subcarrier_freq(struct v4l2_subdev * sd,int pass_through)126 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
127 {
128 /* for some reason pass_through NTSC needs
129 * a different sub-carrier freq to remain stable. */
130 if (pass_through)
131 adv7175_write(sd, 0x02, 0x00);
132 else
133 adv7175_write(sd, 0x02, 0x55);
134
135 adv7175_write(sd, 0x03, 0x55);
136 adv7175_write(sd, 0x04, 0x55);
137 adv7175_write(sd, 0x05, 0x25);
138 }
139
140 /* ----------------------------------------------------------------------- */
141 /* Output filter: S-Video Composite */
142
143 #define MR050 0x11 /* 0x09 */
144 #define MR060 0x14 /* 0x0c */
145
146 /* ----------------------------------------------------------------------- */
147
148 #define TR0MODE 0x46
149 #define TR0RST 0x80
150
151 #define TR1CAPT 0x80
152 #define TR1PLAY 0x00
153
154 static const unsigned char init_common[] = {
155
156 0x00, MR050, /* MR0, PAL enabled */
157 0x01, 0x00, /* MR1 */
158 0x02, 0x0c, /* subc. freq. */
159 0x03, 0x8c, /* subc. freq. */
160 0x04, 0x79, /* subc. freq. */
161 0x05, 0x26, /* subc. freq. */
162 0x06, 0x40, /* subc. phase */
163
164 0x07, TR0MODE, /* TR0, 16bit */
165 0x08, 0x21, /* */
166 0x09, 0x00, /* */
167 0x0a, 0x00, /* */
168 0x0b, 0x00, /* */
169 0x0c, TR1CAPT, /* TR1 */
170 0x0d, 0x4f, /* MR2 */
171 0x0e, 0x00, /* */
172 0x0f, 0x00, /* */
173 0x10, 0x00, /* */
174 0x11, 0x00, /* */
175 };
176
177 static const unsigned char init_pal[] = {
178 0x00, MR050, /* MR0, PAL enabled */
179 0x01, 0x00, /* MR1 */
180 0x02, 0x0c, /* subc. freq. */
181 0x03, 0x8c, /* subc. freq. */
182 0x04, 0x79, /* subc. freq. */
183 0x05, 0x26, /* subc. freq. */
184 0x06, 0x40, /* subc. phase */
185 };
186
187 static const unsigned char init_ntsc[] = {
188 0x00, MR060, /* MR0, NTSC enabled */
189 0x01, 0x00, /* MR1 */
190 0x02, 0x55, /* subc. freq. */
191 0x03, 0x55, /* subc. freq. */
192 0x04, 0x55, /* subc. freq. */
193 0x05, 0x25, /* subc. freq. */
194 0x06, 0x1a, /* subc. phase */
195 };
196
adv7175_init(struct v4l2_subdev * sd,u32 val)197 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
198 {
199 /* This is just for testing!!! */
200 adv7175_write_block(sd, init_common, sizeof(init_common));
201 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
202 adv7175_write(sd, 0x07, TR0MODE);
203 return 0;
204 }
205
adv7175_s_std_output(struct v4l2_subdev * sd,v4l2_std_id std)206 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
207 {
208 struct adv7175 *encoder = to_adv7175(sd);
209
210 if (std & V4L2_STD_NTSC) {
211 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
212 if (encoder->input == 0)
213 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
214 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
215 adv7175_write(sd, 0x07, TR0MODE);
216 } else if (std & V4L2_STD_PAL) {
217 adv7175_write_block(sd, init_pal, sizeof(init_pal));
218 if (encoder->input == 0)
219 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
220 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
221 adv7175_write(sd, 0x07, TR0MODE);
222 } else if (std & V4L2_STD_SECAM) {
223 /* This is an attempt to convert
224 * SECAM->PAL (typically it does not work
225 * due to genlock: when decoder is in SECAM
226 * and encoder in in PAL the subcarrier can
227 * not be syncronized with horizontal
228 * quency) */
229 adv7175_write_block(sd, init_pal, sizeof(init_pal));
230 if (encoder->input == 0)
231 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
232 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
233 adv7175_write(sd, 0x07, TR0MODE);
234 } else {
235 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
236 (unsigned long long)std);
237 return -EINVAL;
238 }
239 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
240 encoder->norm = std;
241 return 0;
242 }
243
adv7175_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)244 static int adv7175_s_routing(struct v4l2_subdev *sd,
245 u32 input, u32 output, u32 config)
246 {
247 struct adv7175 *encoder = to_adv7175(sd);
248
249 /* RJ: input = 0: input is from decoder
250 input = 1: input is from ZR36060
251 input = 2: color bar */
252
253 switch (input) {
254 case 0:
255 adv7175_write(sd, 0x01, 0x00);
256
257 if (encoder->norm & V4L2_STD_NTSC)
258 set_subcarrier_freq(sd, 1);
259
260 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
261 if (encoder->norm & V4L2_STD_SECAM)
262 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
263 else
264 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
265 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
266 adv7175_write(sd, 0x07, TR0MODE);
267 /*udelay(10);*/
268 break;
269
270 case 1:
271 adv7175_write(sd, 0x01, 0x00);
272
273 if (encoder->norm & V4L2_STD_NTSC)
274 set_subcarrier_freq(sd, 0);
275
276 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
277 adv7175_write(sd, 0x0d, 0x49);
278 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
279 adv7175_write(sd, 0x07, TR0MODE);
280 /* udelay(10); */
281 break;
282
283 case 2:
284 adv7175_write(sd, 0x01, 0x80);
285
286 if (encoder->norm & V4L2_STD_NTSC)
287 set_subcarrier_freq(sd, 0);
288
289 adv7175_write(sd, 0x0d, 0x49);
290 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
291 adv7175_write(sd, 0x07, TR0MODE);
292 /* udelay(10); */
293 break;
294
295 default:
296 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
297 return -EINVAL;
298 }
299 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
300 encoder->input = input;
301 return 0;
302 }
303
adv7175_enum_fmt(struct v4l2_subdev * sd,unsigned int index,enum v4l2_mbus_pixelcode * code)304 static int adv7175_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
305 enum v4l2_mbus_pixelcode *code)
306 {
307 if (index >= ARRAY_SIZE(adv7175_codes))
308 return -EINVAL;
309
310 *code = adv7175_codes[index];
311 return 0;
312 }
313
adv7175_g_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)314 static int adv7175_g_fmt(struct v4l2_subdev *sd,
315 struct v4l2_mbus_framefmt *mf)
316 {
317 u8 val = adv7175_read(sd, 0x7);
318
319 if ((val & 0x40) == (1 << 6))
320 mf->code = V4L2_MBUS_FMT_UYVY8_1X16;
321 else
322 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
323
324 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
325 mf->width = 0;
326 mf->height = 0;
327 mf->field = V4L2_FIELD_ANY;
328
329 return 0;
330 }
331
adv7175_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)332 static int adv7175_s_fmt(struct v4l2_subdev *sd,
333 struct v4l2_mbus_framefmt *mf)
334 {
335 u8 val = adv7175_read(sd, 0x7);
336 int ret;
337
338 switch (mf->code) {
339 case V4L2_MBUS_FMT_UYVY8_2X8:
340 val &= ~0x40;
341 break;
342
343 case V4L2_MBUS_FMT_UYVY8_1X16:
344 val |= 0x40;
345 break;
346
347 default:
348 v4l2_dbg(1, debug, sd,
349 "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
350 return -EINVAL;
351 }
352
353 ret = adv7175_write(sd, 0x7, val);
354
355 return ret;
356 }
357
adv7175_g_chip_ident(struct v4l2_subdev * sd,struct v4l2_dbg_chip_ident * chip)358 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
359 {
360 struct i2c_client *client = v4l2_get_subdevdata(sd);
361
362 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
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 .g_chip_ident = adv7175_g_chip_ident,
379 .init = adv7175_init,
380 .s_power = adv7175_s_power,
381 };
382
383 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
384 .s_std_output = adv7175_s_std_output,
385 .s_routing = adv7175_s_routing,
386 .s_mbus_fmt = adv7175_s_fmt,
387 .g_mbus_fmt = adv7175_g_fmt,
388 .enum_mbus_fmt = adv7175_enum_fmt,
389 };
390
391 static const struct v4l2_subdev_ops adv7175_ops = {
392 .core = &adv7175_core_ops,
393 .video = &adv7175_video_ops,
394 };
395
396 /* ----------------------------------------------------------------------- */
397
adv7175_probe(struct i2c_client * client,const struct i2c_device_id * id)398 static int adv7175_probe(struct i2c_client *client,
399 const struct i2c_device_id *id)
400 {
401 int i;
402 struct adv7175 *encoder;
403 struct v4l2_subdev *sd;
404
405 /* Check if the adapter supports the needed features */
406 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
407 return -ENODEV;
408
409 v4l_info(client, "chip found @ 0x%x (%s)\n",
410 client->addr << 1, client->adapter->name);
411
412 encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
413 if (encoder == NULL)
414 return -ENOMEM;
415 sd = &encoder->sd;
416 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
417 encoder->norm = V4L2_STD_NTSC;
418 encoder->input = 0;
419
420 i = adv7175_write_block(sd, init_common, sizeof(init_common));
421 if (i >= 0) {
422 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
423 i = adv7175_write(sd, 0x07, TR0MODE);
424 i = adv7175_read(sd, 0x12);
425 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
426 }
427 if (i < 0)
428 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
429 return 0;
430 }
431
adv7175_remove(struct i2c_client * client)432 static int adv7175_remove(struct i2c_client *client)
433 {
434 struct v4l2_subdev *sd = i2c_get_clientdata(client);
435
436 v4l2_device_unregister_subdev(sd);
437 kfree(to_adv7175(sd));
438 return 0;
439 }
440
441 /* ----------------------------------------------------------------------- */
442
443 static const struct i2c_device_id adv7175_id[] = {
444 { "adv7175", 0 },
445 { "adv7176", 0 },
446 { }
447 };
448 MODULE_DEVICE_TABLE(i2c, adv7175_id);
449
450 static struct i2c_driver adv7175_driver = {
451 .driver = {
452 .owner = THIS_MODULE,
453 .name = "adv7175",
454 },
455 .probe = adv7175_probe,
456 .remove = adv7175_remove,
457 .id_table = adv7175_id,
458 };
459
460 module_i2c_driver(adv7175_driver);
461