1/*
2 * saa7110 - Philips SAA7110(A) video decoder driver
3 *
4 * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
5 *
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 (1/1/2003)
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/types.h>
31#include <linux/delay.h>
32#include <linux/slab.h>
33#include <linux/wait.h>
34#include <asm/uaccess.h>
35#include <linux/i2c.h>
36#include <linux/videodev2.h>
37#include <media/v4l2-device.h>
38#include <media/v4l2-ctrls.h>
39
40MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
41MODULE_AUTHOR("Pauline Middelink");
42MODULE_LICENSE("GPL");
43
44
45static int debug;
46module_param(debug, int, 0);
47MODULE_PARM_DESC(debug, "Debug level (0-1)");
48
49#define SAA7110_MAX_INPUT	9	/* 6 CVBS, 3 SVHS */
50#define SAA7110_MAX_OUTPUT	1	/* 1 YUV */
51
52#define SAA7110_NR_REG		0x35
53
54struct saa7110 {
55	struct v4l2_subdev sd;
56	struct v4l2_ctrl_handler hdl;
57	u8 reg[SAA7110_NR_REG];
58
59	v4l2_std_id norm;
60	int input;
61	int enable;
62
63	wait_queue_head_t wq;
64};
65
66static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
67{
68	return container_of(sd, struct saa7110, sd);
69}
70
71static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
72{
73	return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
74}
75
76/* ----------------------------------------------------------------------- */
77/* I2C support functions						   */
78/* ----------------------------------------------------------------------- */
79
80static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
81{
82	struct i2c_client *client = v4l2_get_subdevdata(sd);
83	struct saa7110 *decoder = to_saa7110(sd);
84
85	decoder->reg[reg] = value;
86	return i2c_smbus_write_byte_data(client, reg, value);
87}
88
89static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
90{
91	struct i2c_client *client = v4l2_get_subdevdata(sd);
92	struct saa7110 *decoder = to_saa7110(sd);
93	int ret = -1;
94	u8 reg = *data;		/* first register to write to */
95
96	/* Sanity check */
97	if (reg + (len - 1) > SAA7110_NR_REG)
98		return ret;
99
100	/* the saa7110 has an autoincrement function, use it if
101	 * the adapter understands raw I2C */
102	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
103		ret = i2c_master_send(client, data, len);
104
105		/* Cache the written data */
106		memcpy(decoder->reg + reg, data + 1, len - 1);
107	} else {
108		for (++data, --len; len; len--) {
109			ret = saa7110_write(sd, reg++, *data++);
110			if (ret < 0)
111				break;
112		}
113	}
114
115	return ret;
116}
117
118static inline int saa7110_read(struct v4l2_subdev *sd)
119{
120	struct i2c_client *client = v4l2_get_subdevdata(sd);
121
122	return i2c_smbus_read_byte(client);
123}
124
125/* ----------------------------------------------------------------------- */
126/* SAA7110 functions							   */
127/* ----------------------------------------------------------------------- */
128
129#define FRESP_06H_COMPST 0x03	/*0x13*/
130#define FRESP_06H_SVIDEO 0x83	/*0xC0*/
131
132
133static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
134{
135	static const unsigned char modes[9][8] = {
136		/* mode 0 */
137		{FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
138			      0x44, 0x75, 0x16},
139		/* mode 1 */
140		{FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
141			      0x44, 0x75, 0x16},
142		/* mode 2 */
143		{FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
144			      0x60, 0xB5, 0x05},
145		/* mode 3 */
146		{FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
147			      0x60, 0xB5, 0x05},
148		/* mode 4 */
149		{FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
150			      0x60, 0xB5, 0x03},
151		/* mode 5 */
152		{FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
153			      0x60, 0xB5, 0x03},
154		/* mode 6 */
155		{FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
156			      0x44, 0x75, 0x12},
157		/* mode 7 */
158		{FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
159			      0x60, 0xB5, 0x14},
160		/* mode 8 */
161		{FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
162			      0x44, 0x75, 0x21}
163	};
164	struct saa7110 *decoder = to_saa7110(sd);
165	const unsigned char *ptr = modes[chan];
166
167	saa7110_write(sd, 0x06, ptr[0]);	/* Luminance control    */
168	saa7110_write(sd, 0x20, ptr[1]);	/* Analog Control #1    */
169	saa7110_write(sd, 0x21, ptr[2]);	/* Analog Control #2    */
170	saa7110_write(sd, 0x22, ptr[3]);	/* Mixer Control #1     */
171	saa7110_write(sd, 0x2C, ptr[4]);	/* Mixer Control #2     */
172	saa7110_write(sd, 0x30, ptr[5]);	/* ADCs gain control    */
173	saa7110_write(sd, 0x31, ptr[6]);	/* Mixer Control #3     */
174	saa7110_write(sd, 0x21, ptr[7]);	/* Analog Control #2    */
175	decoder->input = chan;
176
177	return 0;
178}
179
180static const unsigned char initseq[1 + SAA7110_NR_REG] = {
181	0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
182	/* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
183	/* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
184	/* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
185	/* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
186	/* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
187	/* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
188};
189
190static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
191{
192	DEFINE_WAIT(wait);
193	struct saa7110 *decoder = to_saa7110(sd);
194	int status;
195
196	/* mode changed, start automatic detection */
197	saa7110_write_block(sd, initseq, sizeof(initseq));
198	saa7110_selmux(sd, decoder->input);
199	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
200	schedule_timeout(msecs_to_jiffies(250));
201	finish_wait(&decoder->wq, &wait);
202	status = saa7110_read(sd);
203	if (status & 0x40) {
204		v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
205		return V4L2_STD_UNKNOWN;
206	}
207	if ((status & 3) == 0) {
208		saa7110_write(sd, 0x06, 0x83);
209		if (status & 0x20) {
210			v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
211			/*saa7110_write(sd,0x2E,0x81);*/
212			return V4L2_STD_NTSC;
213		}
214		v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
215		/*saa7110_write(sd,0x2E,0x9A);*/
216		return V4L2_STD_PAL;
217	}
218	/*saa7110_write(sd,0x06,0x03);*/
219	if (status & 0x20) {	/* 60Hz */
220		v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
221		saa7110_write(sd, 0x0D, 0x86);
222		saa7110_write(sd, 0x0F, 0x50);
223		saa7110_write(sd, 0x11, 0x2C);
224		/*saa7110_write(sd,0x2E,0x81);*/
225		return V4L2_STD_NTSC;
226	}
227
228	/* 50Hz -> PAL/SECAM */
229	saa7110_write(sd, 0x0D, 0x86);
230	saa7110_write(sd, 0x0F, 0x10);
231	saa7110_write(sd, 0x11, 0x59);
232	/*saa7110_write(sd,0x2E,0x9A);*/
233
234	prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
235	schedule_timeout(msecs_to_jiffies(250));
236	finish_wait(&decoder->wq, &wait);
237
238	status = saa7110_read(sd);
239	if ((status & 0x03) == 0x01) {
240		v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
241		saa7110_write(sd, 0x0D, 0x87);
242		return V4L2_STD_SECAM;
243	}
244	v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
245	return V4L2_STD_PAL;
246}
247
248static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
249{
250	struct saa7110 *decoder = to_saa7110(sd);
251	int res = V4L2_IN_ST_NO_SIGNAL;
252	int status = saa7110_read(sd);
253
254	v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
255		       status, (unsigned long long)decoder->norm);
256	if (!(status & 0x40))
257		res = 0;
258	if (!(status & 0x03))
259		res |= V4L2_IN_ST_NO_COLOR;
260
261	*pstatus = res;
262	return 0;
263}
264
265static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
266{
267	*std &= determine_norm(sd);
268	return 0;
269}
270
271static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
272{
273	struct saa7110 *decoder = to_saa7110(sd);
274
275	if (decoder->norm != std) {
276		decoder->norm = std;
277		/*saa7110_write(sd, 0x06, 0x03);*/
278		if (std & V4L2_STD_NTSC) {
279			saa7110_write(sd, 0x0D, 0x86);
280			saa7110_write(sd, 0x0F, 0x50);
281			saa7110_write(sd, 0x11, 0x2C);
282			/*saa7110_write(sd, 0x2E, 0x81);*/
283			v4l2_dbg(1, debug, sd, "switched to NTSC\n");
284		} else if (std & V4L2_STD_PAL) {
285			saa7110_write(sd, 0x0D, 0x86);
286			saa7110_write(sd, 0x0F, 0x10);
287			saa7110_write(sd, 0x11, 0x59);
288			/*saa7110_write(sd, 0x2E, 0x9A);*/
289			v4l2_dbg(1, debug, sd, "switched to PAL\n");
290		} else if (std & V4L2_STD_SECAM) {
291			saa7110_write(sd, 0x0D, 0x87);
292			saa7110_write(sd, 0x0F, 0x10);
293			saa7110_write(sd, 0x11, 0x59);
294			/*saa7110_write(sd, 0x2E, 0x9A);*/
295			v4l2_dbg(1, debug, sd, "switched to SECAM\n");
296		} else {
297			return -EINVAL;
298		}
299	}
300	return 0;
301}
302
303static int saa7110_s_routing(struct v4l2_subdev *sd,
304			     u32 input, u32 output, u32 config)
305{
306	struct saa7110 *decoder = to_saa7110(sd);
307
308	if (input >= SAA7110_MAX_INPUT) {
309		v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
310		return -EINVAL;
311	}
312	if (decoder->input != input) {
313		saa7110_selmux(sd, input);
314		v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
315	}
316	return 0;
317}
318
319static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
320{
321	struct saa7110 *decoder = to_saa7110(sd);
322
323	if (decoder->enable != enable) {
324		decoder->enable = enable;
325		saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
326		v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
327	}
328	return 0;
329}
330
331static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
332{
333	struct v4l2_subdev *sd = to_sd(ctrl);
334
335	switch (ctrl->id) {
336	case V4L2_CID_BRIGHTNESS:
337		saa7110_write(sd, 0x19, ctrl->val);
338		break;
339	case V4L2_CID_CONTRAST:
340		saa7110_write(sd, 0x13, ctrl->val);
341		break;
342	case V4L2_CID_SATURATION:
343		saa7110_write(sd, 0x12, ctrl->val);
344		break;
345	case V4L2_CID_HUE:
346		saa7110_write(sd, 0x07, ctrl->val);
347		break;
348	default:
349		return -EINVAL;
350	}
351	return 0;
352}
353
354/* ----------------------------------------------------------------------- */
355
356static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
357	.s_ctrl = saa7110_s_ctrl,
358};
359
360static const struct v4l2_subdev_video_ops saa7110_video_ops = {
361	.s_std = saa7110_s_std,
362	.s_routing = saa7110_s_routing,
363	.s_stream = saa7110_s_stream,
364	.querystd = saa7110_querystd,
365	.g_input_status = saa7110_g_input_status,
366};
367
368static const struct v4l2_subdev_ops saa7110_ops = {
369	.video = &saa7110_video_ops,
370};
371
372/* ----------------------------------------------------------------------- */
373
374static int saa7110_probe(struct i2c_client *client,
375			const struct i2c_device_id *id)
376{
377	struct saa7110 *decoder;
378	struct v4l2_subdev *sd;
379	int rv;
380
381	/* Check if the adapter supports the needed features */
382	if (!i2c_check_functionality(client->adapter,
383		I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
384		return -ENODEV;
385
386	v4l_info(client, "chip found @ 0x%x (%s)\n",
387			client->addr << 1, client->adapter->name);
388
389	decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
390	if (!decoder)
391		return -ENOMEM;
392	sd = &decoder->sd;
393	v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
394	decoder->norm = V4L2_STD_PAL;
395	decoder->input = 0;
396	decoder->enable = 1;
397	v4l2_ctrl_handler_init(&decoder->hdl, 2);
398	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
399		V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
400	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
401		V4L2_CID_CONTRAST, 0, 127, 1, 64);
402	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
403		V4L2_CID_SATURATION, 0, 127, 1, 64);
404	v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
405		V4L2_CID_HUE, -128, 127, 1, 0);
406	sd->ctrl_handler = &decoder->hdl;
407	if (decoder->hdl.error) {
408		int err = decoder->hdl.error;
409
410		v4l2_ctrl_handler_free(&decoder->hdl);
411		return err;
412	}
413	v4l2_ctrl_handler_setup(&decoder->hdl);
414
415	init_waitqueue_head(&decoder->wq);
416
417	rv = saa7110_write_block(sd, initseq, sizeof(initseq));
418	if (rv < 0) {
419		v4l2_dbg(1, debug, sd, "init status %d\n", rv);
420	} else {
421		int ver, status;
422		saa7110_write(sd, 0x21, 0x10);
423		saa7110_write(sd, 0x0e, 0x18);
424		saa7110_write(sd, 0x0D, 0x04);
425		ver = saa7110_read(sd);
426		saa7110_write(sd, 0x0D, 0x06);
427		/*mdelay(150);*/
428		status = saa7110_read(sd);
429		v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
430			       ver, status);
431		saa7110_write(sd, 0x0D, 0x86);
432		saa7110_write(sd, 0x0F, 0x10);
433		saa7110_write(sd, 0x11, 0x59);
434		/*saa7110_write(sd, 0x2E, 0x9A);*/
435	}
436
437	/*saa7110_selmux(sd,0);*/
438	/*determine_norm(sd);*/
439	/* setup and implicit mode 0 select has been performed */
440
441	return 0;
442}
443
444static int saa7110_remove(struct i2c_client *client)
445{
446	struct v4l2_subdev *sd = i2c_get_clientdata(client);
447	struct saa7110 *decoder = to_saa7110(sd);
448
449	v4l2_device_unregister_subdev(sd);
450	v4l2_ctrl_handler_free(&decoder->hdl);
451	return 0;
452}
453
454/* ----------------------------------------------------------------------- */
455
456static const struct i2c_device_id saa7110_id[] = {
457	{ "saa7110", 0 },
458	{ }
459};
460MODULE_DEVICE_TABLE(i2c, saa7110_id);
461
462static struct i2c_driver saa7110_driver = {
463	.driver = {
464		.name	= "saa7110",
465	},
466	.probe		= saa7110_probe,
467	.remove		= saa7110_remove,
468	.id_table	= saa7110_id,
469};
470
471module_i2c_driver(saa7110_driver);
472