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
36MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
37MODULE_AUTHOR("Dave Perks");
38MODULE_LICENSE("GPL");
39
40#define   I2C_ADV7175        0xd4
41#define   I2C_ADV7176        0x54
42
43
44static int debug;
45module_param(debug, int, 0);
46MODULE_PARM_DESC(debug, "Debug level (0-1)");
47
48/* ----------------------------------------------------------------------- */
49
50struct adv7175 {
51	struct v4l2_subdev sd;
52	v4l2_std_id norm;
53	int input;
54};
55
56static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
57{
58	return container_of(sd, struct adv7175, sd);
59}
60
61static char *inputs[] = { "pass_through", "play_back", "color_bar" };
62
63static u32 adv7175_codes[] = {
64	MEDIA_BUS_FMT_UYVY8_2X8,
65	MEDIA_BUS_FMT_UYVY8_1X16,
66};
67
68/* ----------------------------------------------------------------------- */
69
70static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
71{
72	struct i2c_client *client = v4l2_get_subdevdata(sd);
73
74	return i2c_smbus_write_byte_data(client, reg, value);
75}
76
77static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
78{
79	struct i2c_client *client = v4l2_get_subdevdata(sd);
80
81	return i2c_smbus_read_byte_data(client, reg);
82}
83
84static int adv7175_write_block(struct v4l2_subdev *sd,
85		     const u8 *data, unsigned int len)
86{
87	struct i2c_client *client = v4l2_get_subdevdata(sd);
88	int ret = -1;
89	u8 reg;
90
91	/* the adv7175 has an autoincrement function, use it if
92	 * the adapter understands raw I2C */
93	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
94		/* do raw I2C, not smbus compatible */
95		u8 block_data[32];
96		int block_len;
97
98		while (len >= 2) {
99			block_len = 0;
100			block_data[block_len++] = reg = data[0];
101			do {
102				block_data[block_len++] = data[1];
103				reg++;
104				len -= 2;
105				data += 2;
106			} while (len >= 2 && data[0] == reg && block_len < 32);
107			ret = i2c_master_send(client, block_data, block_len);
108			if (ret < 0)
109				break;
110		}
111	} else {
112		/* do some slow I2C emulation kind of thing */
113		while (len >= 2) {
114			reg = *data++;
115			ret = adv7175_write(sd, reg, *data++);
116			if (ret < 0)
117				break;
118			len -= 2;
119		}
120	}
121
122	return ret;
123}
124
125static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
126{
127	/* for some reason pass_through NTSC needs
128	 * a different sub-carrier freq to remain stable. */
129	if (pass_through)
130		adv7175_write(sd, 0x02, 0x00);
131	else
132		adv7175_write(sd, 0x02, 0x55);
133
134	adv7175_write(sd, 0x03, 0x55);
135	adv7175_write(sd, 0x04, 0x55);
136	adv7175_write(sd, 0x05, 0x25);
137}
138
139/* ----------------------------------------------------------------------- */
140/* Output filter:  S-Video  Composite */
141
142#define MR050       0x11	/* 0x09 */
143#define MR060       0x14	/* 0x0c */
144
145/* ----------------------------------------------------------------------- */
146
147#define TR0MODE     0x46
148#define TR0RST	    0x80
149
150#define TR1CAPT	    0x80
151#define TR1PLAY	    0x00
152
153static const unsigned char init_common[] = {
154
155	0x00, MR050,		/* MR0, PAL enabled */
156	0x01, 0x00,		/* MR1 */
157	0x02, 0x0c,		/* subc. freq. */
158	0x03, 0x8c,		/* subc. freq. */
159	0x04, 0x79,		/* subc. freq. */
160	0x05, 0x26,		/* subc. freq. */
161	0x06, 0x40,		/* subc. phase */
162
163	0x07, TR0MODE,		/* TR0, 16bit */
164	0x08, 0x21,		/*  */
165	0x09, 0x00,		/*  */
166	0x0a, 0x00,		/*  */
167	0x0b, 0x00,		/*  */
168	0x0c, TR1CAPT,		/* TR1 */
169	0x0d, 0x4f,		/* MR2 */
170	0x0e, 0x00,		/*  */
171	0x0f, 0x00,		/*  */
172	0x10, 0x00,		/*  */
173	0x11, 0x00,		/*  */
174};
175
176static const unsigned char init_pal[] = {
177	0x00, MR050,		/* MR0, PAL enabled */
178	0x01, 0x00,		/* MR1 */
179	0x02, 0x0c,		/* subc. freq. */
180	0x03, 0x8c,		/* subc. freq. */
181	0x04, 0x79,		/* subc. freq. */
182	0x05, 0x26,		/* subc. freq. */
183	0x06, 0x40,		/* subc. phase */
184};
185
186static const unsigned char init_ntsc[] = {
187	0x00, MR060,		/* MR0, NTSC enabled */
188	0x01, 0x00,		/* MR1 */
189	0x02, 0x55,		/* subc. freq. */
190	0x03, 0x55,		/* subc. freq. */
191	0x04, 0x55,		/* subc. freq. */
192	0x05, 0x25,		/* subc. freq. */
193	0x06, 0x1a,		/* subc. phase */
194};
195
196static int adv7175_init(struct v4l2_subdev *sd, u32 val)
197{
198	/* This is just for testing!!! */
199	adv7175_write_block(sd, init_common, sizeof(init_common));
200	adv7175_write(sd, 0x07, TR0MODE | TR0RST);
201	adv7175_write(sd, 0x07, TR0MODE);
202	return 0;
203}
204
205static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
206{
207	struct adv7175 *encoder = to_adv7175(sd);
208
209	if (std & V4L2_STD_NTSC) {
210		adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
211		if (encoder->input == 0)
212			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
213		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
214		adv7175_write(sd, 0x07, TR0MODE);
215	} else if (std & V4L2_STD_PAL) {
216		adv7175_write_block(sd, init_pal, sizeof(init_pal));
217		if (encoder->input == 0)
218			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
219		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
220		adv7175_write(sd, 0x07, TR0MODE);
221	} else if (std & V4L2_STD_SECAM) {
222		/* This is an attempt to convert
223		 * SECAM->PAL (typically it does not work
224		 * due to genlock: when decoder is in SECAM
225		 * and encoder in in PAL the subcarrier can
226		 * not be syncronized with horizontal
227		 * quency) */
228		adv7175_write_block(sd, init_pal, sizeof(init_pal));
229		if (encoder->input == 0)
230			adv7175_write(sd, 0x0d, 0x49);	/* Disable genlock */
231		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
232		adv7175_write(sd, 0x07, TR0MODE);
233	} else {
234		v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
235				(unsigned long long)std);
236		return -EINVAL;
237	}
238	v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
239	encoder->norm = std;
240	return 0;
241}
242
243static int adv7175_s_routing(struct v4l2_subdev *sd,
244			     u32 input, u32 output, u32 config)
245{
246	struct adv7175 *encoder = to_adv7175(sd);
247
248	/* RJ: input = 0: input is from decoder
249	   input = 1: input is from ZR36060
250	   input = 2: color bar */
251
252	switch (input) {
253	case 0:
254		adv7175_write(sd, 0x01, 0x00);
255
256		if (encoder->norm & V4L2_STD_NTSC)
257			set_subcarrier_freq(sd, 1);
258
259		adv7175_write(sd, 0x0c, TR1CAPT);	/* TR1 */
260		if (encoder->norm & V4L2_STD_SECAM)
261			adv7175_write(sd, 0x0d, 0x49);	/* Disable genlock */
262		else
263			adv7175_write(sd, 0x0d, 0x4f);	/* Enable genlock */
264		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
265		adv7175_write(sd, 0x07, TR0MODE);
266		/*udelay(10);*/
267		break;
268
269	case 1:
270		adv7175_write(sd, 0x01, 0x00);
271
272		if (encoder->norm & V4L2_STD_NTSC)
273			set_subcarrier_freq(sd, 0);
274
275		adv7175_write(sd, 0x0c, TR1PLAY);	/* TR1 */
276		adv7175_write(sd, 0x0d, 0x49);
277		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
278		adv7175_write(sd, 0x07, TR0MODE);
279		/* udelay(10); */
280		break;
281
282	case 2:
283		adv7175_write(sd, 0x01, 0x80);
284
285		if (encoder->norm & V4L2_STD_NTSC)
286			set_subcarrier_freq(sd, 0);
287
288		adv7175_write(sd, 0x0d, 0x49);
289		adv7175_write(sd, 0x07, TR0MODE | TR0RST);
290		adv7175_write(sd, 0x07, TR0MODE);
291		/* udelay(10); */
292		break;
293
294	default:
295		v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
296		return -EINVAL;
297	}
298	v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
299	encoder->input = input;
300	return 0;
301}
302
303static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
304		struct v4l2_subdev_pad_config *cfg,
305		struct v4l2_subdev_mbus_code_enum *code)
306{
307	if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
308		return -EINVAL;
309
310	code->code = adv7175_codes[code->index];
311	return 0;
312}
313
314static int adv7175_get_fmt(struct v4l2_subdev *sd,
315		struct v4l2_subdev_pad_config *cfg,
316		struct v4l2_subdev_format *format)
317{
318	struct v4l2_mbus_framefmt *mf = &format->format;
319	u8 val = adv7175_read(sd, 0x7);
320
321	if (format->pad)
322		return -EINVAL;
323
324	if ((val & 0x40) == (1 << 6))
325		mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
326	else
327		mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
328
329	mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
330	mf->width       = 0;
331	mf->height      = 0;
332	mf->field       = V4L2_FIELD_ANY;
333
334	return 0;
335}
336
337static int adv7175_set_fmt(struct v4l2_subdev *sd,
338		struct v4l2_subdev_pad_config *cfg,
339		struct v4l2_subdev_format *format)
340{
341	struct v4l2_mbus_framefmt *mf = &format->format;
342	u8 val = adv7175_read(sd, 0x7);
343	int ret = 0;
344
345	if (format->pad)
346		return -EINVAL;
347
348	switch (mf->code) {
349	case MEDIA_BUS_FMT_UYVY8_2X8:
350		val &= ~0x40;
351		break;
352
353	case MEDIA_BUS_FMT_UYVY8_1X16:
354		val |= 0x40;
355		break;
356
357	default:
358		v4l2_dbg(1, debug, sd,
359			"illegal v4l2_mbus_framefmt code: %d\n", mf->code);
360		return -EINVAL;
361	}
362
363	if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
364		ret = adv7175_write(sd, 0x7, val);
365
366	return ret;
367}
368
369static int adv7175_s_power(struct v4l2_subdev *sd, int on)
370{
371	if (on)
372		adv7175_write(sd, 0x01, 0x00);
373	else
374		adv7175_write(sd, 0x01, 0x78);
375
376	return 0;
377}
378
379/* ----------------------------------------------------------------------- */
380
381static const struct v4l2_subdev_core_ops adv7175_core_ops = {
382	.init = adv7175_init,
383	.s_power = adv7175_s_power,
384};
385
386static const struct v4l2_subdev_video_ops adv7175_video_ops = {
387	.s_std_output = adv7175_s_std_output,
388	.s_routing = adv7175_s_routing,
389};
390
391static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
392	.enum_mbus_code = adv7175_enum_mbus_code,
393	.get_fmt = adv7175_get_fmt,
394	.set_fmt = adv7175_set_fmt,
395};
396
397static const struct v4l2_subdev_ops adv7175_ops = {
398	.core = &adv7175_core_ops,
399	.video = &adv7175_video_ops,
400	.pad = &adv7175_pad_ops,
401};
402
403/* ----------------------------------------------------------------------- */
404
405static int adv7175_probe(struct i2c_client *client,
406			const struct i2c_device_id *id)
407{
408	int i;
409	struct adv7175 *encoder;
410	struct v4l2_subdev *sd;
411
412	/* Check if the adapter supports the needed features */
413	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
414		return -ENODEV;
415
416	v4l_info(client, "chip found @ 0x%x (%s)\n",
417			client->addr << 1, client->adapter->name);
418
419	encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
420	if (encoder == NULL)
421		return -ENOMEM;
422	sd = &encoder->sd;
423	v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
424	encoder->norm = V4L2_STD_NTSC;
425	encoder->input = 0;
426
427	i = adv7175_write_block(sd, init_common, sizeof(init_common));
428	if (i >= 0) {
429		i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
430		i = adv7175_write(sd, 0x07, TR0MODE);
431		i = adv7175_read(sd, 0x12);
432		v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
433	}
434	if (i < 0)
435		v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
436	return 0;
437}
438
439static int adv7175_remove(struct i2c_client *client)
440{
441	struct v4l2_subdev *sd = i2c_get_clientdata(client);
442
443	v4l2_device_unregister_subdev(sd);
444	return 0;
445}
446
447/* ----------------------------------------------------------------------- */
448
449static const struct i2c_device_id adv7175_id[] = {
450	{ "adv7175", 0 },
451	{ "adv7176", 0 },
452	{ }
453};
454MODULE_DEVICE_TABLE(i2c, adv7175_id);
455
456static struct i2c_driver adv7175_driver = {
457	.driver = {
458		.name	= "adv7175",
459	},
460	.probe		= adv7175_probe,
461	.remove		= adv7175_remove,
462	.id_table	= adv7175_id,
463};
464
465module_i2c_driver(adv7175_driver);
466