1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
|
/*
* Copyright (C) 2005-2006 Micronas USA Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/ioctl.h>
#include <linux/slab.h>
#include "wis-i2c.h"
struct wis_saa7113 {
int norm;
int brightness;
int contrast;
int saturation;
int hue;
};
static u8 initial_registers[] =
{
0x01, 0x08,
0x02, 0xc0,
0x03, 0x33,
0x04, 0x00,
0x05, 0x00,
0x06, 0xe9,
0x07, 0x0d,
0x08, 0xd8,
0x09, 0x40,
0x0a, 0x80,
0x0b, 0x47,
0x0c, 0x40,
0x0d, 0x00,
0x0e, 0x01,
0x0f, 0x2a,
0x10, 0x40,
0x11, 0x0c,
0x12, 0xfe,
0x13, 0x00,
0x14, 0x00,
0x15, 0x04,
0x16, 0x00,
0x17, 0x00,
0x18, 0x00,
0x19, 0x00,
0x1a, 0x00,
0x1b, 0x00,
0x1c, 0x00,
0x1d, 0x00,
0x1e, 0x00,
0x1f, 0xc8,
0x40, 0x00,
0x41, 0xff,
0x42, 0xff,
0x43, 0xff,
0x44, 0xff,
0x45, 0xff,
0x46, 0xff,
0x47, 0xff,
0x48, 0xff,
0x49, 0xff,
0x4a, 0xff,
0x4b, 0xff,
0x4c, 0xff,
0x4d, 0xff,
0x4e, 0xff,
0x4f, 0xff,
0x50, 0xff,
0x51, 0xff,
0x52, 0xff,
0x53, 0xff,
0x54, 0xff,
0x55, 0xff,
0x56, 0xff,
0x57, 0xff,
0x58, 0x00,
0x59, 0x54,
0x5a, 0x07,
0x5b, 0x83,
0x5c, 0x00,
0x5d, 0x00,
0x5e, 0x00,
0x5f, 0x00,
0x60, 0x00,
0x61, 0x00,
0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
};
static int write_reg(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
static int write_regs(struct i2c_client *client, u8 *regs)
{
int i;
for (i = 0; regs[i] != 0x00; i += 2)
if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0)
return -1;
return 0;
}
static int wis_saa7113_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
struct wis_saa7113 *dec = i2c_get_clientdata(client);
switch (cmd) {
case VIDIOC_S_INPUT:
{
int *input = arg;
i2c_smbus_write_byte_data(client, 0x02, 0xC0 | *input);
i2c_smbus_write_byte_data(client, 0x09,
*input < 6 ? 0x40 : 0x80);
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *input = arg;
dec->norm = *input;
if (dec->norm & V4L2_STD_NTSC) {
write_reg(client, 0x0e, 0x01);
write_reg(client, 0x10, 0x40);
} else if (dec->norm & V4L2_STD_PAL) {
write_reg(client, 0x0e, 0x01);
write_reg(client, 0x10, 0x48);
} else if (dec->norm * V4L2_STD_SECAM) {
write_reg(client, 0x0e, 0x50);
write_reg(client, 0x10, 0x48);
}
break;
}
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 255;
ctrl->step = 1;
ctrl->default_value = 128;
ctrl->flags = 0;
break;
case V4L2_CID_CONTRAST:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 71;
ctrl->flags = 0;
break;
case V4L2_CID_SATURATION:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
ctrl->minimum = 0;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 64;
ctrl->flags = 0;
break;
case V4L2_CID_HUE:
ctrl->type = V4L2_CTRL_TYPE_INTEGER;
strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
ctrl->minimum = -128;
ctrl->maximum = 127;
ctrl->step = 1;
ctrl->default_value = 0;
ctrl->flags = 0;
break;
}
break;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
if (ctrl->value > 255)
dec->brightness = 255;
else if (ctrl->value < 0)
dec->brightness = 0;
else
dec->brightness = ctrl->value;
write_reg(client, 0x0a, dec->brightness);
break;
case V4L2_CID_CONTRAST:
if (ctrl->value > 127)
dec->contrast = 127;
else if (ctrl->value < 0)
dec->contrast = 0;
else
dec->contrast = ctrl->value;
write_reg(client, 0x0b, dec->contrast);
break;
case V4L2_CID_SATURATION:
if (ctrl->value > 127)
dec->saturation = 127;
else if (ctrl->value < 0)
dec->saturation = 0;
else
dec->saturation = ctrl->value;
write_reg(client, 0x0c, dec->saturation);
break;
case V4L2_CID_HUE:
if (ctrl->value > 127)
dec->hue = 127;
else if (ctrl->value < -128)
dec->hue = -128;
else
dec->hue = ctrl->value;
write_reg(client, 0x0d, dec->hue);
break;
}
break;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *ctrl = arg;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
ctrl->value = dec->brightness;
break;
case V4L2_CID_CONTRAST:
ctrl->value = dec->contrast;
break;
case V4L2_CID_SATURATION:
ctrl->value = dec->saturation;
break;
case V4L2_CID_HUE:
ctrl->value = dec->hue;
break;
}
break;
}
default:
break;
}
return 0;
}
static int wis_saa7113_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct wis_saa7113 *dec;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
dec = kmalloc(sizeof(struct wis_saa7113), GFP_KERNEL);
if (dec == NULL)
return -ENOMEM;
dec->norm = V4L2_STD_NTSC;
dec->brightness = 128;
dec->contrast = 71;
dec->saturation = 64;
dec->hue = 0;
i2c_set_clientdata(client, dec);
printk(KERN_DEBUG
"wis-saa7113: initializing SAA7113 at address %d on %s\n",
client->addr, adapter->name);
if (write_regs(client, initial_registers) < 0) {
printk(KERN_ERR
"wis-saa7113: error initializing SAA7113\n");
i2c_set_clientdata(client, NULL);
kfree(dec);
return -ENODEV;
}
return 0;
}
static int wis_saa7113_remove(struct i2c_client *client)
{
struct wis_saa7113 *dec = i2c_get_clientdata(client);
i2c_set_clientdata(client, NULL);
kfree(dec);
return 0;
}
static const struct i2c_device_id wis_saa7113_id[] = {
{ "wis_saa7113", 0 },
{ }
};
static struct i2c_driver wis_saa7113_driver = {
.driver = {
.name = "WIS SAA7113 I2C driver",
},
.probe = wis_saa7113_probe,
.remove = wis_saa7113_remove,
.command = wis_saa7113_command,
.id_table = wis_saa7113_id,
};
static int __init wis_saa7113_init(void)
{
return i2c_add_driver(&wis_saa7113_driver);
}
static void __exit wis_saa7113_cleanup(void)
{
i2c_del_driver(&wis_saa7113_driver);
}
module_init(wis_saa7113_init);
module_exit(wis_saa7113_cleanup);
MODULE_LICENSE("GPL v2");
|
