1/*
2 * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
3 *
4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5 *
6 * Slight changes for video timing and attachment output by
7 * Wolfgang Scherr <scherr@net4you.net>
8 *
9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
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("Philips SAA7185 video encoder driver");
37MODULE_AUTHOR("Dave Perks");
38MODULE_LICENSE("GPL");
39
40static int debug;
41module_param(debug, int, 0);
42MODULE_PARM_DESC(debug, "Debug level (0-1)");
43
44
45/* ----------------------------------------------------------------------- */
46
47struct saa7185 {
48	struct v4l2_subdev sd;
49	unsigned char reg[128];
50
51	v4l2_std_id norm;
52};
53
54static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
55{
56	return container_of(sd, struct saa7185, sd);
57}
58
59/* ----------------------------------------------------------------------- */
60
61static inline int saa7185_read(struct v4l2_subdev *sd)
62{
63	struct i2c_client *client = v4l2_get_subdevdata(sd);
64
65	return i2c_smbus_read_byte(client);
66}
67
68static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
69{
70	struct i2c_client *client = v4l2_get_subdevdata(sd);
71	struct saa7185 *encoder = to_saa7185(sd);
72
73	v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
74	encoder->reg[reg] = value;
75	return i2c_smbus_write_byte_data(client, reg, value);
76}
77
78static int saa7185_write_block(struct v4l2_subdev *sd,
79		const u8 *data, unsigned int len)
80{
81	struct i2c_client *client = v4l2_get_subdevdata(sd);
82	struct saa7185 *encoder = to_saa7185(sd);
83	int ret = -1;
84	u8 reg;
85
86	/* the adv7175 has an autoincrement function, use it if
87	 * the adapter understands raw I2C */
88	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
89		/* do raw I2C, not smbus compatible */
90		u8 block_data[32];
91		int block_len;
92
93		while (len >= 2) {
94			block_len = 0;
95			block_data[block_len++] = reg = data[0];
96			do {
97				block_data[block_len++] =
98				    encoder->reg[reg++] = data[1];
99				len -= 2;
100				data += 2;
101			} while (len >= 2 && data[0] == reg && block_len < 32);
102			ret = i2c_master_send(client, block_data, block_len);
103			if (ret < 0)
104				break;
105		}
106	} else {
107		/* do some slow I2C emulation kind of thing */
108		while (len >= 2) {
109			reg = *data++;
110			ret = saa7185_write(sd, reg, *data++);
111			if (ret < 0)
112				break;
113			len -= 2;
114		}
115	}
116
117	return ret;
118}
119
120/* ----------------------------------------------------------------------- */
121
122static const unsigned char init_common[] = {
123	0x3a, 0x0f,		/* CBENB=0, V656=0, VY2C=1,
124				 * YUV2C=1, MY2C=1, MUV2C=1 */
125
126	0x42, 0x6b,		/* OVLY0=107 */
127	0x43, 0x00,		/* OVLU0=0     white */
128	0x44, 0x00,		/* OVLV0=0   */
129	0x45, 0x22,		/* OVLY1=34  */
130	0x46, 0xac,		/* OVLU1=172   yellow */
131	0x47, 0x0e,		/* OVLV1=14  */
132	0x48, 0x03,		/* OVLY2=3   */
133	0x49, 0x1d,		/* OVLU2=29    cyan */
134	0x4a, 0xac,		/* OVLV2=172 */
135	0x4b, 0xf0,		/* OVLY3=240 */
136	0x4c, 0xc8,		/* OVLU3=200   green */
137	0x4d, 0xb9,		/* OVLV3=185 */
138	0x4e, 0xd4,		/* OVLY4=212 */
139	0x4f, 0x38,		/* OVLU4=56    magenta */
140	0x50, 0x47,		/* OVLV4=71  */
141	0x51, 0xc1,		/* OVLY5=193 */
142	0x52, 0xe3,		/* OVLU5=227   red */
143	0x53, 0x54,		/* OVLV5=84  */
144	0x54, 0xa3,		/* OVLY6=163 */
145	0x55, 0x54,		/* OVLU6=84    blue */
146	0x56, 0xf2,		/* OVLV6=242 */
147	0x57, 0x90,		/* OVLY7=144 */
148	0x58, 0x00,		/* OVLU7=0     black */
149	0x59, 0x00,		/* OVLV7=0   */
150
151	0x5a, 0x00,		/* CHPS=0    */
152	0x5b, 0x76,		/* GAINU=118 */
153	0x5c, 0xa5,		/* GAINV=165 */
154	0x5d, 0x3c,		/* BLCKL=60  */
155	0x5e, 0x3a,		/* BLNNL=58  */
156	0x5f, 0x3a,		/* CCRS=0, BLNVB=58 */
157	0x60, 0x00,		/* NULL      */
158
159	/* 0x61 - 0x66 set according to norm */
160
161	0x67, 0x00,		/* 0 : caption 1st byte odd  field */
162	0x68, 0x00,		/* 0 : caption 2nd byte odd  field */
163	0x69, 0x00,		/* 0 : caption 1st byte even field */
164	0x6a, 0x00,		/* 0 : caption 2nd byte even field */
165
166	0x6b, 0x91,		/* MODIN=2, PCREF=0, SCCLN=17 */
167	0x6c, 0x20,		/* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
168				 * CBLF=0, ORCV2=0, PRCV2=0 */
169	0x6d, 0x00,		/* SRCM1=0, CCEN=0 */
170
171	0x6e, 0x0e,		/* HTRIG=0x005, approx. centered, at
172				 * least for PAL */
173	0x6f, 0x00,		/* HTRIG upper bits */
174	0x70, 0x20,		/* PHRES=0, SBLN=1, VTRIG=0 */
175
176	/* The following should not be needed */
177
178	0x71, 0x15,		/* BMRQ=0x115 */
179	0x72, 0x90,		/* EMRQ=0x690 */
180	0x73, 0x61,		/* EMRQ=0x690, BMRQ=0x115 */
181	0x74, 0x00,		/* NULL       */
182	0x75, 0x00,		/* NULL       */
183	0x76, 0x00,		/* NULL       */
184	0x77, 0x15,		/* BRCV=0x115 */
185	0x78, 0x90,		/* ERCV=0x690 */
186	0x79, 0x61,		/* ERCV=0x690, BRCV=0x115 */
187
188	/* Field length controls */
189
190	0x7a, 0x70,		/* FLC=0 */
191
192	/* The following should not be needed if SBLN = 1 */
193
194	0x7b, 0x16,		/* FAL=22 */
195	0x7c, 0x35,		/* LAL=244 */
196	0x7d, 0x20,		/* LAL=244, FAL=22 */
197};
198
199static const unsigned char init_pal[] = {
200	0x61, 0x1e,		/* FISE=0, PAL=1, SCBW=1, RTCE=1,
201				 * YGS=1, INPI=0, DOWN=0 */
202	0x62, 0xc8,		/* DECTYP=1, BSTA=72 */
203	0x63, 0xcb,		/* FSC0 */
204	0x64, 0x8a,		/* FSC1 */
205	0x65, 0x09,		/* FSC2 */
206	0x66, 0x2a,		/* FSC3 */
207};
208
209static const unsigned char init_ntsc[] = {
210	0x61, 0x1d,		/* FISE=1, PAL=0, SCBW=1, RTCE=1,
211				 * YGS=1, INPI=0, DOWN=0 */
212	0x62, 0xe6,		/* DECTYP=1, BSTA=102 */
213	0x63, 0x1f,		/* FSC0 */
214	0x64, 0x7c,		/* FSC1 */
215	0x65, 0xf0,		/* FSC2 */
216	0x66, 0x21,		/* FSC3 */
217};
218
219
220static int saa7185_init(struct v4l2_subdev *sd, u32 val)
221{
222	struct saa7185 *encoder = to_saa7185(sd);
223
224	saa7185_write_block(sd, init_common, sizeof(init_common));
225	if (encoder->norm & V4L2_STD_NTSC)
226		saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
227	else
228		saa7185_write_block(sd, init_pal, sizeof(init_pal));
229	return 0;
230}
231
232static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
233{
234	struct saa7185 *encoder = to_saa7185(sd);
235
236	if (std & V4L2_STD_NTSC)
237		saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
238	else if (std & V4L2_STD_PAL)
239		saa7185_write_block(sd, init_pal, sizeof(init_pal));
240	else
241		return -EINVAL;
242	encoder->norm = std;
243	return 0;
244}
245
246static int saa7185_s_routing(struct v4l2_subdev *sd,
247			     u32 input, u32 output, u32 config)
248{
249	struct saa7185 *encoder = to_saa7185(sd);
250
251	/* RJ: input = 0: input is from SA7111
252	 input = 1: input is from ZR36060 */
253
254	switch (input) {
255	case 0:
256		/* turn off colorbar */
257		saa7185_write(sd, 0x3a, 0x0f);
258		/* Switch RTCE to 1 */
259		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
260		saa7185_write(sd, 0x6e, 0x01);
261		break;
262
263	case 1:
264		/* turn off colorbar */
265		saa7185_write(sd, 0x3a, 0x0f);
266		/* Switch RTCE to 0 */
267		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
268		/* SW: a slight sync problem... */
269		saa7185_write(sd, 0x6e, 0x00);
270		break;
271
272	case 2:
273		/* turn on colorbar */
274		saa7185_write(sd, 0x3a, 0x8f);
275		/* Switch RTCE to 0 */
276		saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
277		/* SW: a slight sync problem... */
278		saa7185_write(sd, 0x6e, 0x01);
279		break;
280
281	default:
282		return -EINVAL;
283	}
284	return 0;
285}
286
287/* ----------------------------------------------------------------------- */
288
289static const struct v4l2_subdev_core_ops saa7185_core_ops = {
290	.init = saa7185_init,
291};
292
293static const struct v4l2_subdev_video_ops saa7185_video_ops = {
294	.s_std_output = saa7185_s_std_output,
295	.s_routing = saa7185_s_routing,
296};
297
298static const struct v4l2_subdev_ops saa7185_ops = {
299	.core = &saa7185_core_ops,
300	.video = &saa7185_video_ops,
301};
302
303
304/* ----------------------------------------------------------------------- */
305
306static int saa7185_probe(struct i2c_client *client,
307			const struct i2c_device_id *id)
308{
309	int i;
310	struct saa7185 *encoder;
311	struct v4l2_subdev *sd;
312
313	/* Check if the adapter supports the needed features */
314	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
315		return -ENODEV;
316
317	v4l_info(client, "chip found @ 0x%x (%s)\n",
318			client->addr << 1, client->adapter->name);
319
320	encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
321	if (encoder == NULL)
322		return -ENOMEM;
323	encoder->norm = V4L2_STD_NTSC;
324	sd = &encoder->sd;
325	v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
326
327	i = saa7185_write_block(sd, init_common, sizeof(init_common));
328	if (i >= 0)
329		i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
330	if (i < 0)
331		v4l2_dbg(1, debug, sd, "init error %d\n", i);
332	else
333		v4l2_dbg(1, debug, sd, "revision 0x%x\n",
334				saa7185_read(sd) >> 5);
335	return 0;
336}
337
338static int saa7185_remove(struct i2c_client *client)
339{
340	struct v4l2_subdev *sd = i2c_get_clientdata(client);
341	struct saa7185 *encoder = to_saa7185(sd);
342
343	v4l2_device_unregister_subdev(sd);
344	/* SW: output off is active */
345	saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
346	return 0;
347}
348
349/* ----------------------------------------------------------------------- */
350
351static const struct i2c_device_id saa7185_id[] = {
352	{ "saa7185", 0 },
353	{ }
354};
355MODULE_DEVICE_TABLE(i2c, saa7185_id);
356
357static struct i2c_driver saa7185_driver = {
358	.driver = {
359		.owner	= THIS_MODULE,
360		.name	= "saa7185",
361	},
362	.probe		= saa7185_probe,
363	.remove		= saa7185_remove,
364	.id_table	= saa7185_id,
365};
366
367module_i2c_driver(saa7185_driver);
368