1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * adv7175 - adv7175a video encoder driver version 0.0.3 |
4 | * |
5 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> |
6 | * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net> |
7 | * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> |
8 | * - some corrections for Pinnacle Systems Inc. DC10plus card. |
9 | * |
10 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> |
11 | * - moved over to linux>=2.4.x i2c protocol (9/9/2002) |
12 | */ |
13 | |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/ioctl.h> |
18 | #include <linux/uaccess.h> |
19 | #include <linux/i2c.h> |
20 | #include <linux/videodev2.h> |
21 | #include <media/v4l2-device.h> |
22 | |
23 | MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver" ); |
24 | MODULE_AUTHOR("Dave Perks" ); |
25 | MODULE_LICENSE("GPL" ); |
26 | |
27 | #define I2C_ADV7175 0xd4 |
28 | #define I2C_ADV7176 0x54 |
29 | |
30 | |
31 | static int debug; |
32 | module_param(debug, int, 0); |
33 | MODULE_PARM_DESC(debug, "Debug level (0-1)" ); |
34 | |
35 | /* ----------------------------------------------------------------------- */ |
36 | |
37 | struct adv7175 { |
38 | struct v4l2_subdev sd; |
39 | v4l2_std_id norm; |
40 | int input; |
41 | }; |
42 | |
43 | static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd) |
44 | { |
45 | return container_of(sd, struct adv7175, sd); |
46 | } |
47 | |
48 | static char *inputs[] = { "pass_through" , "play_back" , "color_bar" }; |
49 | |
50 | static u32 adv7175_codes[] = { |
51 | MEDIA_BUS_FMT_UYVY8_2X8, |
52 | MEDIA_BUS_FMT_UYVY8_1X16, |
53 | }; |
54 | |
55 | /* ----------------------------------------------------------------------- */ |
56 | |
57 | static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
58 | { |
59 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
60 | |
61 | return i2c_smbus_write_byte_data(client, command: reg, value); |
62 | } |
63 | |
64 | static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg) |
65 | { |
66 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
67 | |
68 | return i2c_smbus_read_byte_data(client, command: reg); |
69 | } |
70 | |
71 | static int adv7175_write_block(struct v4l2_subdev *sd, |
72 | const u8 *data, unsigned int len) |
73 | { |
74 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
75 | int ret = -1; |
76 | u8 reg; |
77 | |
78 | /* the adv7175 has an autoincrement function, use it if |
79 | * the adapter understands raw I2C */ |
80 | if (i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C)) { |
81 | /* do raw I2C, not smbus compatible */ |
82 | u8 block_data[32]; |
83 | int block_len; |
84 | |
85 | while (len >= 2) { |
86 | block_len = 0; |
87 | block_data[block_len++] = reg = data[0]; |
88 | do { |
89 | block_data[block_len++] = data[1]; |
90 | reg++; |
91 | len -= 2; |
92 | data += 2; |
93 | } while (len >= 2 && data[0] == reg && block_len < 32); |
94 | ret = i2c_master_send(client, buf: block_data, count: block_len); |
95 | if (ret < 0) |
96 | break; |
97 | } |
98 | } else { |
99 | /* do some slow I2C emulation kind of thing */ |
100 | while (len >= 2) { |
101 | reg = *data++; |
102 | ret = adv7175_write(sd, reg, value: *data++); |
103 | if (ret < 0) |
104 | break; |
105 | len -= 2; |
106 | } |
107 | } |
108 | |
109 | return ret; |
110 | } |
111 | |
112 | static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through) |
113 | { |
114 | /* for some reason pass_through NTSC needs |
115 | * a different sub-carrier freq to remain stable. */ |
116 | if (pass_through) |
117 | adv7175_write(sd, reg: 0x02, value: 0x00); |
118 | else |
119 | adv7175_write(sd, reg: 0x02, value: 0x55); |
120 | |
121 | adv7175_write(sd, reg: 0x03, value: 0x55); |
122 | adv7175_write(sd, reg: 0x04, value: 0x55); |
123 | adv7175_write(sd, reg: 0x05, value: 0x25); |
124 | } |
125 | |
126 | /* ----------------------------------------------------------------------- */ |
127 | /* Output filter: S-Video Composite */ |
128 | |
129 | #define MR050 0x11 /* 0x09 */ |
130 | #define MR060 0x14 /* 0x0c */ |
131 | |
132 | /* ----------------------------------------------------------------------- */ |
133 | |
134 | #define TR0MODE 0x46 |
135 | #define TR0RST 0x80 |
136 | |
137 | #define TR1CAPT 0x80 |
138 | #define TR1PLAY 0x00 |
139 | |
140 | static const unsigned char init_common[] = { |
141 | |
142 | 0x00, MR050, /* MR0, PAL enabled */ |
143 | 0x01, 0x00, /* MR1 */ |
144 | 0x02, 0x0c, /* subc. freq. */ |
145 | 0x03, 0x8c, /* subc. freq. */ |
146 | 0x04, 0x79, /* subc. freq. */ |
147 | 0x05, 0x26, /* subc. freq. */ |
148 | 0x06, 0x40, /* subc. phase */ |
149 | |
150 | 0x07, TR0MODE, /* TR0, 16bit */ |
151 | 0x08, 0x21, /* */ |
152 | 0x09, 0x00, /* */ |
153 | 0x0a, 0x00, /* */ |
154 | 0x0b, 0x00, /* */ |
155 | 0x0c, TR1CAPT, /* TR1 */ |
156 | 0x0d, 0x4f, /* MR2 */ |
157 | 0x0e, 0x00, /* */ |
158 | 0x0f, 0x00, /* */ |
159 | 0x10, 0x00, /* */ |
160 | 0x11, 0x00, /* */ |
161 | }; |
162 | |
163 | static const unsigned char init_pal[] = { |
164 | 0x00, MR050, /* MR0, PAL enabled */ |
165 | 0x01, 0x00, /* MR1 */ |
166 | 0x02, 0x0c, /* subc. freq. */ |
167 | 0x03, 0x8c, /* subc. freq. */ |
168 | 0x04, 0x79, /* subc. freq. */ |
169 | 0x05, 0x26, /* subc. freq. */ |
170 | 0x06, 0x40, /* subc. phase */ |
171 | }; |
172 | |
173 | static const unsigned char init_ntsc[] = { |
174 | 0x00, MR060, /* MR0, NTSC enabled */ |
175 | 0x01, 0x00, /* MR1 */ |
176 | 0x02, 0x55, /* subc. freq. */ |
177 | 0x03, 0x55, /* subc. freq. */ |
178 | 0x04, 0x55, /* subc. freq. */ |
179 | 0x05, 0x25, /* subc. freq. */ |
180 | 0x06, 0x1a, /* subc. phase */ |
181 | }; |
182 | |
183 | static int adv7175_init(struct v4l2_subdev *sd, u32 val) |
184 | { |
185 | /* This is just for testing!!! */ |
186 | adv7175_write_block(sd, data: init_common, len: sizeof(init_common)); |
187 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
188 | adv7175_write(sd, reg: 0x07, TR0MODE); |
189 | return 0; |
190 | } |
191 | |
192 | static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) |
193 | { |
194 | struct adv7175 *encoder = to_adv7175(sd); |
195 | |
196 | if (std & V4L2_STD_NTSC) { |
197 | adv7175_write_block(sd, data: init_ntsc, len: sizeof(init_ntsc)); |
198 | if (encoder->input == 0) |
199 | adv7175_write(sd, reg: 0x0d, value: 0x4f); /* Enable genlock */ |
200 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
201 | adv7175_write(sd, reg: 0x07, TR0MODE); |
202 | } else if (std & V4L2_STD_PAL) { |
203 | adv7175_write_block(sd, data: init_pal, len: sizeof(init_pal)); |
204 | if (encoder->input == 0) |
205 | adv7175_write(sd, reg: 0x0d, value: 0x4f); /* Enable genlock */ |
206 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
207 | adv7175_write(sd, reg: 0x07, TR0MODE); |
208 | } else if (std & V4L2_STD_SECAM) { |
209 | /* This is an attempt to convert |
210 | * SECAM->PAL (typically it does not work |
211 | * due to genlock: when decoder is in SECAM |
212 | * and encoder in in PAL the subcarrier can |
213 | * not be synchronized with horizontal |
214 | * quency) */ |
215 | adv7175_write_block(sd, data: init_pal, len: sizeof(init_pal)); |
216 | if (encoder->input == 0) |
217 | adv7175_write(sd, reg: 0x0d, value: 0x49); /* Disable genlock */ |
218 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
219 | adv7175_write(sd, reg: 0x07, TR0MODE); |
220 | } else { |
221 | v4l2_dbg(1, debug, sd, "illegal norm: %llx\n" , |
222 | (unsigned long long)std); |
223 | return -EINVAL; |
224 | } |
225 | v4l2_dbg(1, debug, sd, "switched to %llx\n" , (unsigned long long)std); |
226 | encoder->norm = std; |
227 | return 0; |
228 | } |
229 | |
230 | static int adv7175_s_routing(struct v4l2_subdev *sd, |
231 | u32 input, u32 output, u32 config) |
232 | { |
233 | struct adv7175 *encoder = to_adv7175(sd); |
234 | |
235 | /* RJ: input = 0: input is from decoder |
236 | input = 1: input is from ZR36060 |
237 | input = 2: color bar */ |
238 | |
239 | switch (input) { |
240 | case 0: |
241 | adv7175_write(sd, reg: 0x01, value: 0x00); |
242 | |
243 | if (encoder->norm & V4L2_STD_NTSC) |
244 | set_subcarrier_freq(sd, pass_through: 1); |
245 | |
246 | adv7175_write(sd, reg: 0x0c, TR1CAPT); /* TR1 */ |
247 | if (encoder->norm & V4L2_STD_SECAM) |
248 | adv7175_write(sd, reg: 0x0d, value: 0x49); /* Disable genlock */ |
249 | else |
250 | adv7175_write(sd, reg: 0x0d, value: 0x4f); /* Enable genlock */ |
251 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
252 | adv7175_write(sd, reg: 0x07, TR0MODE); |
253 | /*udelay(10);*/ |
254 | break; |
255 | |
256 | case 1: |
257 | adv7175_write(sd, reg: 0x01, value: 0x00); |
258 | |
259 | if (encoder->norm & V4L2_STD_NTSC) |
260 | set_subcarrier_freq(sd, pass_through: 0); |
261 | |
262 | adv7175_write(sd, reg: 0x0c, TR1PLAY); /* TR1 */ |
263 | adv7175_write(sd, reg: 0x0d, value: 0x49); |
264 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
265 | adv7175_write(sd, reg: 0x07, TR0MODE); |
266 | /* udelay(10); */ |
267 | break; |
268 | |
269 | case 2: |
270 | adv7175_write(sd, reg: 0x01, value: 0x80); |
271 | |
272 | if (encoder->norm & V4L2_STD_NTSC) |
273 | set_subcarrier_freq(sd, pass_through: 0); |
274 | |
275 | adv7175_write(sd, reg: 0x0d, value: 0x49); |
276 | adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
277 | adv7175_write(sd, reg: 0x07, TR0MODE); |
278 | /* udelay(10); */ |
279 | break; |
280 | |
281 | default: |
282 | v4l2_dbg(1, debug, sd, "illegal input: %d\n" , input); |
283 | return -EINVAL; |
284 | } |
285 | v4l2_dbg(1, debug, sd, "switched to %s\n" , inputs[input]); |
286 | encoder->input = input; |
287 | return 0; |
288 | } |
289 | |
290 | static int adv7175_enum_mbus_code(struct v4l2_subdev *sd, |
291 | struct v4l2_subdev_state *sd_state, |
292 | struct v4l2_subdev_mbus_code_enum *code) |
293 | { |
294 | if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes)) |
295 | return -EINVAL; |
296 | |
297 | code->code = adv7175_codes[code->index]; |
298 | return 0; |
299 | } |
300 | |
301 | static int adv7175_get_fmt(struct v4l2_subdev *sd, |
302 | struct v4l2_subdev_state *sd_state, |
303 | struct v4l2_subdev_format *format) |
304 | { |
305 | struct v4l2_mbus_framefmt *mf = &format->format; |
306 | u8 val = adv7175_read(sd, reg: 0x7); |
307 | |
308 | if (format->pad) |
309 | return -EINVAL; |
310 | |
311 | if ((val & 0x40) == (1 << 6)) |
312 | mf->code = MEDIA_BUS_FMT_UYVY8_1X16; |
313 | else |
314 | mf->code = MEDIA_BUS_FMT_UYVY8_2X8; |
315 | |
316 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; |
317 | mf->width = 0; |
318 | mf->height = 0; |
319 | mf->field = V4L2_FIELD_ANY; |
320 | |
321 | return 0; |
322 | } |
323 | |
324 | static int adv7175_set_fmt(struct v4l2_subdev *sd, |
325 | struct v4l2_subdev_state *sd_state, |
326 | struct v4l2_subdev_format *format) |
327 | { |
328 | struct v4l2_mbus_framefmt *mf = &format->format; |
329 | u8 val = adv7175_read(sd, reg: 0x7); |
330 | int ret = 0; |
331 | |
332 | if (format->pad) |
333 | return -EINVAL; |
334 | |
335 | switch (mf->code) { |
336 | case MEDIA_BUS_FMT_UYVY8_2X8: |
337 | val &= ~0x40; |
338 | break; |
339 | |
340 | case MEDIA_BUS_FMT_UYVY8_1X16: |
341 | val |= 0x40; |
342 | break; |
343 | |
344 | default: |
345 | v4l2_dbg(1, debug, sd, |
346 | "illegal v4l2_mbus_framefmt code: %d\n" , mf->code); |
347 | return -EINVAL; |
348 | } |
349 | |
350 | if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) |
351 | ret = adv7175_write(sd, reg: 0x7, value: val); |
352 | |
353 | return ret; |
354 | } |
355 | |
356 | static int adv7175_s_power(struct v4l2_subdev *sd, int on) |
357 | { |
358 | if (on) |
359 | adv7175_write(sd, reg: 0x01, value: 0x00); |
360 | else |
361 | adv7175_write(sd, reg: 0x01, value: 0x78); |
362 | |
363 | return 0; |
364 | } |
365 | |
366 | /* ----------------------------------------------------------------------- */ |
367 | |
368 | static const struct v4l2_subdev_core_ops adv7175_core_ops = { |
369 | .init = adv7175_init, |
370 | .s_power = adv7175_s_power, |
371 | }; |
372 | |
373 | static const struct v4l2_subdev_video_ops adv7175_video_ops = { |
374 | .s_std_output = adv7175_s_std_output, |
375 | .s_routing = adv7175_s_routing, |
376 | }; |
377 | |
378 | static const struct v4l2_subdev_pad_ops adv7175_pad_ops = { |
379 | .enum_mbus_code = adv7175_enum_mbus_code, |
380 | .get_fmt = adv7175_get_fmt, |
381 | .set_fmt = adv7175_set_fmt, |
382 | }; |
383 | |
384 | static const struct v4l2_subdev_ops adv7175_ops = { |
385 | .core = &adv7175_core_ops, |
386 | .video = &adv7175_video_ops, |
387 | .pad = &adv7175_pad_ops, |
388 | }; |
389 | |
390 | /* ----------------------------------------------------------------------- */ |
391 | |
392 | static int adv7175_probe(struct i2c_client *client) |
393 | { |
394 | int i; |
395 | struct adv7175 *encoder; |
396 | struct v4l2_subdev *sd; |
397 | |
398 | /* Check if the adapter supports the needed features */ |
399 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
400 | return -ENODEV; |
401 | |
402 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
403 | client->addr << 1, client->adapter->name); |
404 | |
405 | encoder = devm_kzalloc(dev: &client->dev, size: sizeof(*encoder), GFP_KERNEL); |
406 | if (encoder == NULL) |
407 | return -ENOMEM; |
408 | sd = &encoder->sd; |
409 | v4l2_i2c_subdev_init(sd, client, ops: &adv7175_ops); |
410 | encoder->norm = V4L2_STD_NTSC; |
411 | encoder->input = 0; |
412 | |
413 | i = adv7175_write_block(sd, data: init_common, len: sizeof(init_common)); |
414 | if (i >= 0) { |
415 | i = adv7175_write(sd, reg: 0x07, TR0MODE | TR0RST); |
416 | i = adv7175_write(sd, reg: 0x07, TR0MODE); |
417 | i = adv7175_read(sd, reg: 0x12); |
418 | v4l2_dbg(1, debug, sd, "revision %d\n" , i & 1); |
419 | } |
420 | if (i < 0) |
421 | v4l2_dbg(1, debug, sd, "init error 0x%x\n" , i); |
422 | return 0; |
423 | } |
424 | |
425 | static void adv7175_remove(struct i2c_client *client) |
426 | { |
427 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
428 | |
429 | v4l2_device_unregister_subdev(sd); |
430 | } |
431 | |
432 | /* ----------------------------------------------------------------------- */ |
433 | |
434 | static const struct i2c_device_id adv7175_id[] = { |
435 | { "adv7175" , 0 }, |
436 | { "adv7176" , 0 }, |
437 | { } |
438 | }; |
439 | MODULE_DEVICE_TABLE(i2c, adv7175_id); |
440 | |
441 | static struct i2c_driver adv7175_driver = { |
442 | .driver = { |
443 | .name = "adv7175" , |
444 | }, |
445 | .probe = adv7175_probe, |
446 | .remove = adv7175_remove, |
447 | .id_table = adv7175_id, |
448 | }; |
449 | |
450 | module_i2c_driver(adv7175_driver); |
451 | |