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 
to_adv7175(struct v4l2_subdev * sd)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 
adv7175_write(struct v4l2_subdev * sd,u8 reg,u8 value)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, reg, value);
62 }
63 
adv7175_read(struct v4l2_subdev * sd,u8 reg)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, reg);
69 }
70 
adv7175_write_block(struct v4l2_subdev * sd,const u8 * data,unsigned int len)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(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, block_data, 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, *data++);
103 			if (ret < 0)
104 				break;
105 			len -= 2;
106 		}
107 	}
108 
109 	return ret;
110 }
111 
set_subcarrier_freq(struct v4l2_subdev * sd,int pass_through)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, 0x02, 0x00);
118 	else
119 		adv7175_write(sd, 0x02, 0x55);
120 
121 	adv7175_write(sd, 0x03, 0x55);
122 	adv7175_write(sd, 0x04, 0x55);
123 	adv7175_write(sd, 0x05, 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 
adv7175_init(struct v4l2_subdev * sd,u32 val)183 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
184 {
185 	/* This is just for testing!!! */
186 	adv7175_write_block(sd, init_common, sizeof(init_common));
187 	adv7175_write(sd, 0x07, TR0MODE | TR0RST);
188 	adv7175_write(sd, 0x07, TR0MODE);
189 	return 0;
190 }
191 
adv7175_s_std_output(struct v4l2_subdev * sd,v4l2_std_id std)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, init_ntsc, sizeof(init_ntsc));
198 		if (encoder->input == 0)
199 			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
200 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
201 		adv7175_write(sd, 0x07, TR0MODE);
202 	} else if (std & V4L2_STD_PAL) {
203 		adv7175_write_block(sd, init_pal, sizeof(init_pal));
204 		if (encoder->input == 0)
205 			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
206 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
207 		adv7175_write(sd, 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, init_pal, sizeof(init_pal));
216 		if (encoder->input == 0)
217 			adv7175_write(sd, 0x0d, 0x49);	/* Disable genlock */
218 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
219 		adv7175_write(sd, 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 
adv7175_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)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, 0x01, 0x00);
242 
243 		if (encoder->norm & V4L2_STD_NTSC)
244 			set_subcarrier_freq(sd, 1);
245 
246 		adv7175_write(sd, 0x0c, TR1CAPT);	/* TR1 */
247 		if (encoder->norm & V4L2_STD_SECAM)
248 			adv7175_write(sd, 0x0d, 0x49);	/* Disable genlock */
249 		else
250 			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
251 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
252 		adv7175_write(sd, 0x07, TR0MODE);
253 		/*udelay(10);*/
254 		break;
255 
256 	case 1:
257 		adv7175_write(sd, 0x01, 0x00);
258 
259 		if (encoder->norm & V4L2_STD_NTSC)
260 			set_subcarrier_freq(sd, 0);
261 
262 		adv7175_write(sd, 0x0c, TR1PLAY);	/* TR1 */
263 		adv7175_write(sd, 0x0d, 0x49);
264 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
265 		adv7175_write(sd, 0x07, TR0MODE);
266 		/* udelay(10); */
267 		break;
268 
269 	case 2:
270 		adv7175_write(sd, 0x01, 0x80);
271 
272 		if (encoder->norm & V4L2_STD_NTSC)
273 			set_subcarrier_freq(sd, 0);
274 
275 		adv7175_write(sd, 0x0d, 0x49);
276 		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
277 		adv7175_write(sd, 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 
adv7175_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)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 
adv7175_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)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, 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 
adv7175_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)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, 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, 0x7, val);
352 
353 	return ret;
354 }
355 
adv7175_s_power(struct v4l2_subdev * sd,int on)356 static int adv7175_s_power(struct v4l2_subdev *sd, int on)
357 {
358 	if (on)
359 		adv7175_write(sd, 0x01, 0x00);
360 	else
361 		adv7175_write(sd, 0x01, 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 
adv7175_probe(struct i2c_client * client,const struct i2c_device_id * id)392 static int adv7175_probe(struct i2c_client *client,
393 			const struct i2c_device_id *id)
394 {
395 	int i;
396 	struct adv7175 *encoder;
397 	struct v4l2_subdev *sd;
398 
399 	/* Check if the adapter supports the needed features */
400 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
401 		return -ENODEV;
402 
403 	v4l_info(client, "chip found @ 0x%x (%s)\n",
404 			client->addr << 1, client->adapter->name);
405 
406 	encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
407 	if (encoder == NULL)
408 		return -ENOMEM;
409 	sd = &encoder->sd;
410 	v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
411 	encoder->norm = V4L2_STD_NTSC;
412 	encoder->input = 0;
413 
414 	i = adv7175_write_block(sd, init_common, sizeof(init_common));
415 	if (i >= 0) {
416 		i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
417 		i = adv7175_write(sd, 0x07, TR0MODE);
418 		i = adv7175_read(sd, 0x12);
419 		v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
420 	}
421 	if (i < 0)
422 		v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
423 	return 0;
424 }
425 
adv7175_remove(struct i2c_client * client)426 static int adv7175_remove(struct i2c_client *client)
427 {
428 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
429 
430 	v4l2_device_unregister_subdev(sd);
431 	return 0;
432 }
433 
434 /* ----------------------------------------------------------------------- */
435 
436 static const struct i2c_device_id adv7175_id[] = {
437 	{ "adv7175", 0 },
438 	{ "adv7176", 0 },
439 	{ }
440 };
441 MODULE_DEVICE_TABLE(i2c, adv7175_id);
442 
443 static struct i2c_driver adv7175_driver = {
444 	.driver = {
445 		.name	= "adv7175",
446 	},
447 	.probe		= adv7175_probe,
448 	.remove		= adv7175_remove,
449 	.id_table	= adv7175_id,
450 };
451 
452 module_i2c_driver(adv7175_driver);
453