tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/ioctl.h>
30#include <asm/uaccess.h>
31#include <linux/i2c.h>
32#include <linux/i2c-id.h>
33#include <linux/videodev2.h>
34#include <media/v4l2-device.h>
35#include <media/v4l2-chip-ident.h>
36#include <media/v4l2-i2c-drv.h>
37
38MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
39MODULE_AUTHOR("Dave Perks");
40MODULE_LICENSE("GPL");
41
42static int debug;
43module_param(debug, int, 0);
44MODULE_PARM_DESC(debug, "Debug level (0-1)");
45
46
47/* ----------------------------------------------------------------------- */
48
49struct saa7185 {
50 struct v4l2_subdev sd;
51 unsigned char reg[128];
52
53 v4l2_std_id norm;
54};
55
56static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
57{
58 return container_of(sd, struct saa7185, sd);
59}
60
61/* ----------------------------------------------------------------------- */
62
63static inline int saa7185_read(struct v4l2_subdev *sd)
64{
65 struct i2c_client *client = v4l2_get_subdevdata(sd);
66
67 return i2c_smbus_read_byte(client);
68}
69
70static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
71{
72 struct i2c_client *client = v4l2_get_subdevdata(sd);
73 struct saa7185 *encoder = to_saa7185(sd);
74
75 v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
76 encoder->reg[reg] = value;
77 return i2c_smbus_write_byte_data(client, reg, value);
78}
79
80static int saa7185_write_block(struct v4l2_subdev *sd,
81 const u8 *data, unsigned int len)
82{
83 struct i2c_client *client = v4l2_get_subdevdata(sd);
84 struct saa7185 *encoder = to_saa7185(sd);
85 int ret = -1;
86 u8 reg;
87
88 /* the adv7175 has an autoincrement function, use it if
89 * the adapter understands raw I2C */
90 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
91 /* do raw I2C, not smbus compatible */
92 u8 block_data[32];
93 int block_len;
94
95 while (len >= 2) {
96 block_len = 0;
97 block_data[block_len++] = reg = data[0];
98 do {
99 block_data[block_len++] =
100 encoder->reg[reg++] = data[1];
101 len -= 2;
102 data += 2;
103 } while (len >= 2 && data[0] == reg && block_len < 32);
104 ret = i2c_master_send(client, block_data, block_len);
105 if (ret < 0)
106 break;
107 }
108 } else {
109 /* do some slow I2C emulation kind of thing */
110 while (len >= 2) {
111 reg = *data++;
112 ret = saa7185_write(sd, reg, *data++);
113 if (ret < 0)
114 break;
115 len -= 2;
116 }
117 }
118
119 return ret;
120}
121
122/* ----------------------------------------------------------------------- */
123
124static const unsigned char init_common[] = {
125 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
126 * YUV2C=1, MY2C=1, MUV2C=1 */
127
128 0x42, 0x6b, /* OVLY0=107 */
129 0x43, 0x00, /* OVLU0=0 white */
130 0x44, 0x00, /* OVLV0=0 */
131 0x45, 0x22, /* OVLY1=34 */
132 0x46, 0xac, /* OVLU1=172 yellow */
133 0x47, 0x0e, /* OVLV1=14 */
134 0x48, 0x03, /* OVLY2=3 */
135 0x49, 0x1d, /* OVLU2=29 cyan */
136 0x4a, 0xac, /* OVLV2=172 */
137 0x4b, 0xf0, /* OVLY3=240 */
138 0x4c, 0xc8, /* OVLU3=200 green */
139 0x4d, 0xb9, /* OVLV3=185 */
140 0x4e, 0xd4, /* OVLY4=212 */
141 0x4f, 0x38, /* OVLU4=56 magenta */
142 0x50, 0x47, /* OVLV4=71 */
143 0x51, 0xc1, /* OVLY5=193 */
144 0x52, 0xe3, /* OVLU5=227 red */
145 0x53, 0x54, /* OVLV5=84 */
146 0x54, 0xa3, /* OVLY6=163 */
147 0x55, 0x54, /* OVLU6=84 blue */
148 0x56, 0xf2, /* OVLV6=242 */
149 0x57, 0x90, /* OVLY7=144 */
150 0x58, 0x00, /* OVLU7=0 black */
151 0x59, 0x00, /* OVLV7=0 */
152
153 0x5a, 0x00, /* CHPS=0 */
154 0x5b, 0x76, /* GAINU=118 */
155 0x5c, 0xa5, /* GAINV=165 */
156 0x5d, 0x3c, /* BLCKL=60 */
157 0x5e, 0x3a, /* BLNNL=58 */
158 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
159 0x60, 0x00, /* NULL */
160
161 /* 0x61 - 0x66 set according to norm */
162
163 0x67, 0x00, /* 0 : caption 1st byte odd field */
164 0x68, 0x00, /* 0 : caption 2nd byte odd field */
165 0x69, 0x00, /* 0 : caption 1st byte even field */
166 0x6a, 0x00, /* 0 : caption 2nd byte even field */
167
168 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
169 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
170 * CBLF=0, ORCV2=0, PRCV2=0 */
171 0x6d, 0x00, /* SRCM1=0, CCEN=0 */
172
173 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
174 * least for PAL */
175 0x6f, 0x00, /* HTRIG upper bits */
176 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
177
178 /* The following should not be needed */
179
180 0x71, 0x15, /* BMRQ=0x115 */
181 0x72, 0x90, /* EMRQ=0x690 */
182 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
183 0x74, 0x00, /* NULL */
184 0x75, 0x00, /* NULL */
185 0x76, 0x00, /* NULL */
186 0x77, 0x15, /* BRCV=0x115 */
187 0x78, 0x90, /* ERCV=0x690 */
188 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
189
190 /* Field length controls */
191
192 0x7a, 0x70, /* FLC=0 */
193
194 /* The following should not be needed if SBLN = 1 */
195
196 0x7b, 0x16, /* FAL=22 */
197 0x7c, 0x35, /* LAL=244 */
198 0x7d, 0x20, /* LAL=244, FAL=22 */
199};
200
201static const unsigned char init_pal[] = {
202 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
203 * YGS=1, INPI=0, DOWN=0 */
204 0x62, 0xc8, /* DECTYP=1, BSTA=72 */
205 0x63, 0xcb, /* FSC0 */
206 0x64, 0x8a, /* FSC1 */
207 0x65, 0x09, /* FSC2 */
208 0x66, 0x2a, /* FSC3 */
209};
210
211static const unsigned char init_ntsc[] = {
212 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
213 * YGS=1, INPI=0, DOWN=0 */
214 0x62, 0xe6, /* DECTYP=1, BSTA=102 */
215 0x63, 0x1f, /* FSC0 */
216 0x64, 0x7c, /* FSC1 */
217 0x65, 0xf0, /* FSC2 */
218 0x66, 0x21, /* FSC3 */
219};
220
221
222static int saa7185_init(struct v4l2_subdev *sd, u32 val)
223{
224 struct saa7185 *encoder = to_saa7185(sd);
225
226 saa7185_write_block(sd, init_common, sizeof(init_common));
227 if (encoder->norm & V4L2_STD_NTSC)
228 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
229 else
230 saa7185_write_block(sd, init_pal, sizeof(init_pal));
231 return 0;
232}
233
234static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
235{
236 struct saa7185 *encoder = to_saa7185(sd);
237
238 if (std & V4L2_STD_NTSC)
239 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
240 else if (std & V4L2_STD_PAL)
241 saa7185_write_block(sd, init_pal, sizeof(init_pal));
242 else
243 return -EINVAL;
244 encoder->norm = std;
245 return 0;
246}
247
248static int saa7185_s_routing(struct v4l2_subdev *sd,
249 u32 input, u32 output, u32 config)
250{
251 struct saa7185 *encoder = to_saa7185(sd);
252
253 /* RJ: input = 0: input is from SA7111
254 input = 1: input is from ZR36060 */
255
256 switch (input) {
257 case 0:
258 /* turn off colorbar */
259 saa7185_write(sd, 0x3a, 0x0f);
260 /* Switch RTCE to 1 */
261 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
262 saa7185_write(sd, 0x6e, 0x01);
263 break;
264
265 case 1:
266 /* turn off colorbar */
267 saa7185_write(sd, 0x3a, 0x0f);
268 /* Switch RTCE to 0 */
269 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
270 /* SW: a slight sync problem... */
271 saa7185_write(sd, 0x6e, 0x00);
272 break;
273
274 case 2:
275 /* turn on colorbar */
276 saa7185_write(sd, 0x3a, 0x8f);
277 /* Switch RTCE to 0 */
278 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
279 /* SW: a slight sync problem... */
280 saa7185_write(sd, 0x6e, 0x01);
281 break;
282
283 default:
284 return -EINVAL;
285 }
286 return 0;
287}
288
289static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
290{
291 struct i2c_client *client = v4l2_get_subdevdata(sd);
292
293 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
294}
295
296/* ----------------------------------------------------------------------- */
297
298static const struct v4l2_subdev_core_ops saa7185_core_ops = {
299 .g_chip_ident = saa7185_g_chip_ident,
300 .init = saa7185_init,
301};
302
303static const struct v4l2_subdev_video_ops saa7185_video_ops = {
304 .s_std_output = saa7185_s_std_output,
305 .s_routing = saa7185_s_routing,
306};
307
308static const struct v4l2_subdev_ops saa7185_ops = {
309 .core = &saa7185_core_ops,
310 .video = &saa7185_video_ops,
311};
312
313
314/* ----------------------------------------------------------------------- */
315
316static int saa7185_probe(struct i2c_client *client,
317 const struct i2c_device_id *id)
318{
319 int i;
320 struct saa7185 *encoder;
321 struct v4l2_subdev *sd;
322
323 /* Check if the adapter supports the needed features */
324 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
325 return -ENODEV;
326
327 v4l_info(client, "chip found @ 0x%x (%s)\n",
328 client->addr << 1, client->adapter->name);
329
330 encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
331 if (encoder == NULL)
332 return -ENOMEM;
333 encoder->norm = V4L2_STD_NTSC;
334 sd = &encoder->sd;
335 v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
336
337 i = saa7185_write_block(sd, init_common, sizeof(init_common));
338 if (i >= 0)
339 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
340 if (i < 0)
341 v4l2_dbg(1, debug, sd, "init error %d\n", i);
342 else
343 v4l2_dbg(1, debug, sd, "revision 0x%x\n",
344 saa7185_read(sd) >> 5);
345 return 0;
346}
347
348static int saa7185_remove(struct i2c_client *client)
349{
350 struct v4l2_subdev *sd = i2c_get_clientdata(client);
351 struct saa7185 *encoder = to_saa7185(sd);
352
353 v4l2_device_unregister_subdev(sd);
354 /* SW: output off is active */
355 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
356 kfree(encoder);
357 return 0;
358}
359
360/* ----------------------------------------------------------------------- */
361
362static const struct i2c_device_id saa7185_id[] = {
363 { "saa7185", 0 },
364 { }
365};
366MODULE_DEVICE_TABLE(i2c, saa7185_id);
367
368static struct v4l2_i2c_driver_data v4l2_i2c_data = {
369 .name = "saa7185",
370 .probe = saa7185_probe,
371 .remove = saa7185_remove,
372 .id_table = saa7185_id,
373};