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/init.h>
29#include <linux/delay.h>
30#include <linux/errno.h>
31#include <linux/fs.h>
32#include <linux/kernel.h>
33#include <linux/major.h>
34#include <linux/slab.h>
35#include <linux/mm.h>
36#include <linux/signal.h>
37#include <asm/io.h>
38#include <asm/pgtable.h>
39#include <asm/page.h>
40#include <linux/types.h>
41
42#include <linux/videodev.h>
43#include <asm/uaccess.h>
44
45MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
46MODULE_AUTHOR("Dave Perks");
47MODULE_LICENSE("GPL");
48
49#include <linux/i2c.h>
50
51#define I2C_NAME(s) (s)->name
52
53#include <linux/video_encoder.h>
54
55static int debug = 0;
56module_param(debug, int, 0);
57MODULE_PARM_DESC(debug, "Debug level (0-1)");
58
59#define dprintk(num, format, args...) \
60	do { \
61		if (debug >= num) \
62			printk(format, ##args); \
63	} while (0)
64
65/* ----------------------------------------------------------------------- */
66
67struct adv7175 {
68	int norm;
69	int input;
70	int enable;
71	int bright;
72	int contrast;
73	int hue;
74	int sat;
75};
76
77#define   I2C_ADV7175        0xd4
78#define   I2C_ADV7176        0x54
79
80static char adv7175_name[] = "adv7175";
81static char adv7176_name[] = "adv7176";
82
83static char *inputs[] = { "pass_through", "play_back", "color_bar" };
84static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };
85
86/* ----------------------------------------------------------------------- */
87
88static inline int
89adv7175_write (struct i2c_client *client,
90	       u8                 reg,
91	       u8                 value)
92{
93	return i2c_smbus_write_byte_data(client, reg, value);
94}
95
96static inline int
97adv7175_read (struct i2c_client *client,
98	      u8                 reg)
99{
100	return i2c_smbus_read_byte_data(client, reg);
101}
102
103static int
104adv7175_write_block (struct i2c_client *client,
105		     const u8          *data,
106		     unsigned int       len)
107{
108	int ret = -1;
109	u8 reg;
110
111	/* the adv7175 has an autoincrement function, use it if
112	 * the adapter understands raw I2C */
113	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
114		/* do raw I2C, not smbus compatible */
115		u8 block_data[32];
116		int block_len;
117
118		while (len >= 2) {
119			block_len = 0;
120			block_data[block_len++] = reg = data[0];
121			do {
122				block_data[block_len++] = data[1];
123				reg++;
124				len -= 2;
125				data += 2;
126			} while (len >= 2 && data[0] == reg &&
127				 block_len < 32);
128			if ((ret = i2c_master_send(client, block_data,
129						   block_len)) < 0)
130				break;
131		}
132	} else {
133		/* do some slow I2C emulation kind of thing */
134		while (len >= 2) {
135			reg = *data++;
136			if ((ret = adv7175_write(client, reg,
137						 *data++)) < 0)
138				break;
139			len -= 2;
140		}
141	}
142
143	return ret;
144}
145
146static void
147set_subcarrier_freq (struct i2c_client *client,
148		     int                pass_through)
149{
150	/* for some reason pass_through NTSC needs
151	 * a different sub-carrier freq to remain stable. */
152	if(pass_through)
153		adv7175_write(client, 0x02, 0x00);
154	else
155		adv7175_write(client, 0x02, 0x55);
156
157	adv7175_write(client, 0x03, 0x55);
158	adv7175_write(client, 0x04, 0x55);
159	adv7175_write(client, 0x05, 0x25);
160}
161
162/* ----------------------------------------------------------------------- */
163// Output filter:  S-Video  Composite
164
165#define MR050       0x11	//0x09
166#define MR060       0x14	//0x0c
167
168//---------------------------------------------------------------------------
169
170#define TR0MODE     0x46
171#define TR0RST	    0x80
172
173#define TR1CAPT	    0x80
174#define TR1PLAY	    0x00
175
176static const unsigned char init_common[] = {
177
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	0x07, TR0MODE,		/* TR0, 16bit */
187	0x08, 0x21,		/*  */
188	0x09, 0x00,		/*  */
189	0x0a, 0x00,		/*  */
190	0x0b, 0x00,		/*  */
191	0x0c, TR1CAPT,		/* TR1 */
192	0x0d, 0x4f,		/* MR2 */
193	0x0e, 0x00,		/*  */
194	0x0f, 0x00,		/*  */
195	0x10, 0x00,		/*  */
196	0x11, 0x00,		/*  */
197};
198
199static const unsigned char init_pal[] = {
200	0x00, MR050,		/* MR0, PAL enabled */
201	0x01, 0x00,		/* MR1 */
202	0x02, 0x0c,		/* subc. freq. */
203	0x03, 0x8c,		/* subc. freq. */
204	0x04, 0x79,		/* subc. freq. */
205	0x05, 0x26,		/* subc. freq. */
206	0x06, 0x40,		/* subc. phase */
207};
208
209static const unsigned char init_ntsc[] = {
210	0x00, MR060,		/* MR0, NTSC enabled */
211	0x01, 0x00,		/* MR1 */
212	0x02, 0x55,		/* subc. freq. */
213	0x03, 0x55,		/* subc. freq. */
214	0x04, 0x55,		/* subc. freq. */
215	0x05, 0x25,		/* subc. freq. */
216	0x06, 0x1a,		/* subc. phase */
217};
218
219static int
220adv7175_command (struct i2c_client *client,
221		 unsigned int       cmd,
222		 void              *arg)
223{
224	struct adv7175 *encoder = i2c_get_clientdata(client);
225
226	switch (cmd) {
227
228	case 0:
229		/* This is just for testing!!! */
230		adv7175_write_block(client, init_common,
231				    sizeof(init_common));
232		adv7175_write(client, 0x07, TR0MODE | TR0RST);
233		adv7175_write(client, 0x07, TR0MODE);
234		break;
235
236	case ENCODER_GET_CAPABILITIES:
237	{
238		struct video_encoder_capability *cap = arg;
239
240		cap->flags = VIDEO_ENCODER_PAL |
241			     VIDEO_ENCODER_NTSC |
242			     VIDEO_ENCODER_SECAM; /* well, hacky */
243		cap->inputs = 2;
244		cap->outputs = 1;
245	}
246		break;
247
248	case ENCODER_SET_NORM:
249	{
250		int iarg = *(int *) arg;
251
252		switch (iarg) {
253
254		case VIDEO_MODE_NTSC:
255			adv7175_write_block(client, init_ntsc,
256					    sizeof(init_ntsc));
257			if (encoder->input == 0)
258				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
259			adv7175_write(client, 0x07, TR0MODE | TR0RST);
260			adv7175_write(client, 0x07, TR0MODE);
261			break;
262
263		case VIDEO_MODE_PAL:
264			adv7175_write_block(client, init_pal,
265					    sizeof(init_pal));
266			if (encoder->input == 0)
267				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
268			adv7175_write(client, 0x07, TR0MODE | TR0RST);
269			adv7175_write(client, 0x07, TR0MODE);
270			break;
271
272		case VIDEO_MODE_SECAM:	// WARNING! ADV7176 does not support SECAM.
273			/* This is an attempt to convert
274			 * SECAM->PAL (typically it does not work
275			 * due to genlock: when decoder is in SECAM
276			 * and encoder in in PAL the subcarrier can
277			 * not be syncronized with horizontal
278			 * quency) */
279			adv7175_write_block(client, init_pal,
280					    sizeof(init_pal));
281			if (encoder->input == 0)
282				adv7175_write(client, 0x0d, 0x49);	// Disable genlock
283			adv7175_write(client, 0x07, TR0MODE | TR0RST);
284			adv7175_write(client, 0x07, TR0MODE);
285			break;
286		default:
287			dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
288				I2C_NAME(client), iarg);
289			return -EINVAL;
290
291		}
292		dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
293			norms[iarg]);
294		encoder->norm = iarg;
295	}
296		break;
297
298	case ENCODER_SET_INPUT:
299	{
300		int iarg = *(int *) arg;
301
302		/* RJ: *iarg = 0: input is from SAA7110
303		 *iarg = 1: input is from ZR36060
304		 *iarg = 2: color bar */
305
306		switch (iarg) {
307
308		case 0:
309			adv7175_write(client, 0x01, 0x00);
310
311			if (encoder->norm == VIDEO_MODE_NTSC)
312				set_subcarrier_freq(client, 1);
313
314			adv7175_write(client, 0x0c, TR1CAPT);	/* TR1 */
315			if (encoder->norm == VIDEO_MODE_SECAM)
316				adv7175_write(client, 0x0d, 0x49);	// Disable genlock
317			else
318				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
319			adv7175_write(client, 0x07, TR0MODE | TR0RST);
320			adv7175_write(client, 0x07, TR0MODE);
321			//udelay(10);
322			break;
323
324		case 1:
325			adv7175_write(client, 0x01, 0x00);
326
327			if (encoder->norm == VIDEO_MODE_NTSC)
328				set_subcarrier_freq(client, 0);
329
330			adv7175_write(client, 0x0c, TR1PLAY);	/* TR1 */
331			adv7175_write(client, 0x0d, 0x49);
332			adv7175_write(client, 0x07, TR0MODE | TR0RST);
333			adv7175_write(client, 0x07, TR0MODE);
334			//udelay(10);
335			break;
336
337		case 2:
338			adv7175_write(client, 0x01, 0x80);
339
340			if (encoder->norm == VIDEO_MODE_NTSC)
341				set_subcarrier_freq(client, 0);
342
343			adv7175_write(client, 0x0d, 0x49);
344			adv7175_write(client, 0x07, TR0MODE | TR0RST);
345			adv7175_write(client, 0x07, TR0MODE);
346			//udelay(10);
347			break;
348
349		default:
350			dprintk(1, KERN_ERR "%s: illegal input: %d\n",
351				I2C_NAME(client), iarg);
352			return -EINVAL;
353
354		}
355		dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
356			inputs[iarg]);
357		encoder->input = iarg;
358	}
359		break;
360
361	case ENCODER_SET_OUTPUT:
362	{
363		int *iarg = arg;
364
365		/* not much choice of outputs */
366		if (*iarg != 0) {
367			return -EINVAL;
368		}
369	}
370		break;
371
372	case ENCODER_ENABLE_OUTPUT:
373	{
374		int *iarg = arg;
375
376		encoder->enable = !!*iarg;
377	}
378		break;
379
380	default:
381		return -EINVAL;
382	}
383
384	return 0;
385}
386
387/* ----------------------------------------------------------------------- */
388
389/*
390 * Generic i2c probe
391 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
392 */
393static unsigned short normal_i2c[] =
394    { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
395	I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
396	I2C_CLIENT_END
397};
398
399static unsigned short ignore = I2C_CLIENT_END;
400
401static struct i2c_client_address_data addr_data = {
402	.normal_i2c		= normal_i2c,
403	.probe			= &ignore,
404	.ignore			= &ignore,
405};
406
407static struct i2c_driver i2c_driver_adv7175;
408
409static int
410adv7175_detect_client (struct i2c_adapter *adapter,
411		       int                 address,
412		       int                 kind)
413{
414	int i;
415	struct i2c_client *client;
416	struct adv7175 *encoder;
417	char *dname;
418
419	dprintk(1,
420		KERN_INFO
421		"adv7175.c: detecting adv7175 client on address 0x%x\n",
422		address << 1);
423
424	/* Check if the adapter supports the needed features */
425	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
426		return 0;
427
428	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
429	if (client == 0)
430		return -ENOMEM;
431	client->addr = address;
432	client->adapter = adapter;
433	client->driver = &i2c_driver_adv7175;
434	if ((client->addr == I2C_ADV7175 >> 1) ||
435	    (client->addr == (I2C_ADV7175 >> 1) + 1)) {
436		dname = adv7175_name;
437	} else if ((client->addr == I2C_ADV7176 >> 1) ||
438		   (client->addr == (I2C_ADV7176 >> 1) + 1)) {
439		dname = adv7176_name;
440	} else {
441		/* We should never get here!!! */
442		kfree(client);
443		return 0;
444	}
445	strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
446
447	encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
448	if (encoder == NULL) {
449		kfree(client);
450		return -ENOMEM;
451	}
452	encoder->norm = VIDEO_MODE_PAL;
453	encoder->input = 0;
454	encoder->enable = 1;
455	i2c_set_clientdata(client, encoder);
456
457	i = i2c_attach_client(client);
458	if (i) {
459		kfree(client);
460		kfree(encoder);
461		return i;
462	}
463
464	i = adv7175_write_block(client, init_common, sizeof(init_common));
465	if (i >= 0) {
466		i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
467		i = adv7175_write(client, 0x07, TR0MODE);
468		i = adv7175_read(client, 0x12);
469		dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
470			I2C_NAME(client), i & 1, client->addr << 1);
471	}
472	if (i < 0) {
473		dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
474			I2C_NAME(client), i);
475	}
476
477	return 0;
478}
479
480static int
481adv7175_attach_adapter (struct i2c_adapter *adapter)
482{
483	dprintk(1,
484		KERN_INFO
485		"adv7175.c: starting probe for adapter %s (0x%x)\n",
486		I2C_NAME(adapter), adapter->id);
487	return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
488}
489
490static int
491adv7175_detach_client (struct i2c_client *client)
492{
493	struct adv7175 *encoder = i2c_get_clientdata(client);
494	int err;
495
496	err = i2c_detach_client(client);
497	if (err) {
498		return err;
499	}
500
501	kfree(encoder);
502	kfree(client);
503
504	return 0;
505}
506
507/* ----------------------------------------------------------------------- */
508
509static struct i2c_driver i2c_driver_adv7175 = {
510	.driver = {
511		.name = "adv7175",	/* name */
512	},
513
514	.id = I2C_DRIVERID_ADV7175,
515
516	.attach_adapter = adv7175_attach_adapter,
517	.detach_client = adv7175_detach_client,
518	.command = adv7175_command,
519};
520
521static int __init
522adv7175_init (void)
523{
524	return i2c_add_driver(&i2c_driver_adv7175);
525}
526
527static void __exit
528adv7175_exit (void)
529{
530	i2c_del_driver(&i2c_driver_adv7175);
531}
532
533module_init(adv7175_init);
534module_exit(adv7175_exit);
535