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
|
/*
* Driver for the ov7660 sensor
*
* Copyright (C) 2009 Erik Andrén
* Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
* Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
*
* Portions of code to USB interface and ALi driver software,
* Copyright (c) 2006 Willem Duinker
* v4l2 interface modeled after the V4L2 driver
* for SN9C10x PC Camera Controllers
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "m5602_ov7660.h"
static int ov7660_s_ctrl(struct v4l2_ctrl *ctrl);
static void ov7660_dump_registers(struct sd *sd);
static struct v4l2_pix_format ov7660_modes[] = {
{
640,
480,
V4L2_PIX_FMT_SBGGR8,
V4L2_FIELD_NONE,
.sizeimage =
640 * 480,
.bytesperline = 640,
.colorspace = V4L2_COLORSPACE_SRGB,
.priv = 0
}
};
static const struct v4l2_ctrl_ops ov7660_ctrl_ops = {
.s_ctrl = ov7660_s_ctrl,
};
int ov7660_probe(struct sd *sd)
{
int err = 0, i;
u8 prod_id = 0, ver_id = 0;
if (force_sensor) {
if (force_sensor == OV7660_SENSOR) {
pr_info("Forcing an %s sensor\n", ov7660.name);
goto sensor_found;
}
/* If we want to force another sensor,
don't try to probe this one */
return -ENODEV;
}
/* Do the preinit */
for (i = 0; i < ARRAY_SIZE(preinit_ov7660) && !err; i++) {
u8 data[2];
if (preinit_ov7660[i][0] == BRIDGE) {
err = m5602_write_bridge(sd,
preinit_ov7660[i][1],
preinit_ov7660[i][2]);
} else {
data[0] = preinit_ov7660[i][2];
err = m5602_write_sensor(sd,
preinit_ov7660[i][1], data, 1);
}
}
if (err < 0)
return err;
if (m5602_read_sensor(sd, OV7660_PID, &prod_id, 1))
return -ENODEV;
if (m5602_read_sensor(sd, OV7660_VER, &ver_id, 1))
return -ENODEV;
pr_info("Sensor reported 0x%x%x\n", prod_id, ver_id);
if ((prod_id == 0x76) && (ver_id == 0x60)) {
pr_info("Detected a ov7660 sensor\n");
goto sensor_found;
}
return -ENODEV;
sensor_found:
sd->gspca_dev.cam.cam_mode = ov7660_modes;
sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes);
return 0;
}
int ov7660_init(struct sd *sd)
{
int i, err;
/* Init the sensor */
for (i = 0; i < ARRAY_SIZE(init_ov7660); i++) {
u8 data[2];
if (init_ov7660[i][0] == BRIDGE) {
err = m5602_write_bridge(sd,
init_ov7660[i][1],
init_ov7660[i][2]);
} else {
data[0] = init_ov7660[i][2];
err = m5602_write_sensor(sd,
init_ov7660[i][1], data, 1);
}
if (err < 0)
return err;
}
if (dump_sensor)
ov7660_dump_registers(sd);
return 0;
}
int ov7660_init_controls(struct sd *sd)
{
struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
sd->gspca_dev.vdev.ctrl_handler = hdl;
v4l2_ctrl_handler_init(hdl, 6);
v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_AUTO_WHITE_BALANCE,
0, 1, 1, 1);
v4l2_ctrl_new_std_menu(hdl, &ov7660_ctrl_ops,
V4L2_CID_EXPOSURE_AUTO, 1, 0, V4L2_EXPOSURE_AUTO);
sd->autogain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
sd->gain = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_GAIN, 0,
255, 1, OV7660_DEFAULT_GAIN);
sd->hflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_HFLIP,
0, 1, 1, 0);
sd->vflip = v4l2_ctrl_new_std(hdl, &ov7660_ctrl_ops, V4L2_CID_VFLIP,
0, 1, 1, 0);
if (hdl->error) {
pr_err("Could not initialize controls\n");
return hdl->error;
}
v4l2_ctrl_auto_cluster(2, &sd->autogain, 0, false);
v4l2_ctrl_cluster(2, &sd->hflip);
return 0;
}
int ov7660_start(struct sd *sd)
{
return 0;
}
int ov7660_stop(struct sd *sd)
{
return 0;
}
void ov7660_disconnect(struct sd *sd)
{
ov7660_stop(sd);
sd->sensor = NULL;
}
static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data = val;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_CONF, "Setting gain to %d", val);
err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1);
return err;
}
static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev,
__s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_CONF, "Set auto white balance to %d", val);
err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
if (err < 0)
return err;
i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1));
err = m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
return err;
}
static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_CONF, "Set auto gain control to %d", val);
err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
if (err < 0)
return err;
i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2));
return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
}
static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev,
__s32 val)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_CONF, "Set auto exposure control to %d", val);
err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
if (err < 0)
return err;
val = (val == V4L2_EXPOSURE_AUTO);
i2c_data = ((i2c_data & 0xfe) | ((val & 0x01) << 0));
return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
}
static int ov7660_set_hvflip(struct gspca_dev *gspca_dev)
{
int err;
u8 i2c_data;
struct sd *sd = (struct sd *) gspca_dev;
PDEBUG(D_CONF, "Set hvflip to %d, %d", sd->hflip->val, sd->vflip->val);
i2c_data = (sd->hflip->val << 5) | (sd->vflip->val << 4);
err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1);
return err;
}
static int ov7660_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct gspca_dev *gspca_dev =
container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
struct sd *sd = (struct sd *) gspca_dev;
int err;
if (!gspca_dev->streaming)
return 0;
switch (ctrl->id) {
case V4L2_CID_AUTO_WHITE_BALANCE:
err = ov7660_set_auto_white_balance(gspca_dev, ctrl->val);
break;
case V4L2_CID_EXPOSURE_AUTO:
err = ov7660_set_auto_exposure(gspca_dev, ctrl->val);
break;
case V4L2_CID_AUTOGAIN:
err = ov7660_set_auto_gain(gspca_dev, ctrl->val);
if (err || ctrl->val)
return err;
err = ov7660_set_gain(gspca_dev, sd->gain->val);
break;
case V4L2_CID_HFLIP:
err = ov7660_set_hvflip(gspca_dev);
break;
default:
return -EINVAL;
}
return err;
}
static void ov7660_dump_registers(struct sd *sd)
{
int address;
pr_info("Dumping the ov7660 register state\n");
for (address = 0; address < 0xa9; address++) {
u8 value;
m5602_read_sensor(sd, address, &value, 1);
pr_info("register 0x%x contains 0x%x\n", address, value);
}
pr_info("ov7660 register state dump complete\n");
pr_info("Probing for which registers that are read/write\n");
for (address = 0; address < 0xff; address++) {
u8 old_value, ctrl_value;
u8 test_value[2] = {0xff, 0xff};
m5602_read_sensor(sd, address, &old_value, 1);
m5602_write_sensor(sd, address, test_value, 1);
m5602_read_sensor(sd, address, &ctrl_value, 1);
if (ctrl_value == test_value[0])
pr_info("register 0x%x is writeable\n", address);
else
pr_info("register 0x%x is read only\n", address);
/* Restore original value */
m5602_write_sensor(sd, address, &old_value, 1);
}
}
|
