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Diffstat (limited to 'drivers/media/video/gspca/m5602/m5602_ov7660.c')
-rw-r--r--drivers/media/video/gspca/m5602/m5602_ov7660.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_ov7660.c b/drivers/media/video/gspca/m5602/m5602_ov7660.c
new file mode 100644
index 00000000000..b12f60464b3
--- /dev/null
+++ b/drivers/media/video/gspca/m5602/m5602_ov7660.c
@@ -0,0 +1,487 @@
1/*
2 * Driver for the ov7660 sensor
3 *
4 * Copyright (C) 2009 Erik Andrén
5 * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
6 * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
7 *
8 * Portions of code to USB interface and ALi driver software,
9 * Copyright (c) 2006 Willem Duinker
10 * v4l2 interface modeled after the V4L2 driver
11 * for SN9C10x PC Camera Controllers
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation, version 2.
16 *
17 */
18
19#include "m5602_ov7660.h"
20
21static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
22static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val);
23static int ov7660_get_auto_white_balance(struct gspca_dev *gspca_dev,
24 __s32 *val);
25static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev,
26 __s32 val);
27static int ov7660_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val);
28static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val);
29static int ov7660_get_auto_exposure(struct gspca_dev *gspca_dev, __s32 *val);
30static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev, __s32 val);
31static int ov7660_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
32static int ov7660_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
33static int ov7660_get_vflip(struct gspca_dev *gspca_dev, __s32 *val);
34static int ov7660_set_vflip(struct gspca_dev *gspca_dev, __s32 val);
35
36static const struct ctrl ov7660_ctrls[] = {
37#define GAIN_IDX 1
38 {
39 {
40 .id = V4L2_CID_GAIN,
41 .type = V4L2_CTRL_TYPE_INTEGER,
42 .name = "gain",
43 .minimum = 0x00,
44 .maximum = 0xff,
45 .step = 0x1,
46 .default_value = OV7660_DEFAULT_GAIN,
47 .flags = V4L2_CTRL_FLAG_SLIDER
48 },
49 .set = ov7660_set_gain,
50 .get = ov7660_get_gain
51 },
52#define BLUE_BALANCE_IDX 2
53#define RED_BALANCE_IDX 3
54#define AUTO_WHITE_BALANCE_IDX 4
55 {
56 {
57 .id = V4L2_CID_AUTO_WHITE_BALANCE,
58 .type = V4L2_CTRL_TYPE_BOOLEAN,
59 .name = "auto white balance",
60 .minimum = 0,
61 .maximum = 1,
62 .step = 1,
63 .default_value = 1
64 },
65 .set = ov7660_set_auto_white_balance,
66 .get = ov7660_get_auto_white_balance
67 },
68#define AUTO_GAIN_CTRL_IDX 5
69 {
70 {
71 .id = V4L2_CID_AUTOGAIN,
72 .type = V4L2_CTRL_TYPE_BOOLEAN,
73 .name = "auto gain control",
74 .minimum = 0,
75 .maximum = 1,
76 .step = 1,
77 .default_value = 1
78 },
79 .set = ov7660_set_auto_gain,
80 .get = ov7660_get_auto_gain
81 },
82#define AUTO_EXPOSURE_IDX 6
83 {
84 {
85 .id = V4L2_CID_EXPOSURE_AUTO,
86 .type = V4L2_CTRL_TYPE_BOOLEAN,
87 .name = "auto exposure",
88 .minimum = 0,
89 .maximum = 1,
90 .step = 1,
91 .default_value = 1
92 },
93 .set = ov7660_set_auto_exposure,
94 .get = ov7660_get_auto_exposure
95 },
96#define HFLIP_IDX 7
97 {
98 {
99 .id = V4L2_CID_HFLIP,
100 .type = V4L2_CTRL_TYPE_BOOLEAN,
101 .name = "horizontal flip",
102 .minimum = 0,
103 .maximum = 1,
104 .step = 1,
105 .default_value = 0
106 },
107 .set = ov7660_set_hflip,
108 .get = ov7660_get_hflip
109 },
110#define VFLIP_IDX 8
111 {
112 {
113 .id = V4L2_CID_VFLIP,
114 .type = V4L2_CTRL_TYPE_BOOLEAN,
115 .name = "vertical flip",
116 .minimum = 0,
117 .maximum = 1,
118 .step = 1,
119 .default_value = 0
120 },
121 .set = ov7660_set_vflip,
122 .get = ov7660_get_vflip
123 },
124
125};
126
127static struct v4l2_pix_format ov7660_modes[] = {
128 {
129 640,
130 480,
131 V4L2_PIX_FMT_SBGGR8,
132 V4L2_FIELD_NONE,
133 .sizeimage =
134 640 * 480,
135 .bytesperline = 640,
136 .colorspace = V4L2_COLORSPACE_SRGB,
137 .priv = 0
138 }
139};
140
141static void ov7660_dump_registers(struct sd *sd);
142
143int ov7660_probe(struct sd *sd)
144{
145 int err = 0, i;
146 u8 prod_id = 0, ver_id = 0;
147
148 s32 *sensor_settings;
149
150 if (force_sensor) {
151 if (force_sensor == OV7660_SENSOR) {
152 info("Forcing an %s sensor", ov7660.name);
153 goto sensor_found;
154 }
155 /* If we want to force another sensor,
156 don't try to probe this one */
157 return -ENODEV;
158 }
159
160 /* Do the preinit */
161 for (i = 0; i < ARRAY_SIZE(preinit_ov7660) && !err; i++) {
162 u8 data[2];
163
164 if (preinit_ov7660[i][0] == BRIDGE) {
165 err = m5602_write_bridge(sd,
166 preinit_ov7660[i][1],
167 preinit_ov7660[i][2]);
168 } else {
169 data[0] = preinit_ov7660[i][2];
170 err = m5602_write_sensor(sd,
171 preinit_ov7660[i][1], data, 1);
172 }
173 }
174 if (err < 0)
175 return err;
176
177 if (m5602_read_sensor(sd, OV7660_PID, &prod_id, 1))
178 return -ENODEV;
179
180 if (m5602_read_sensor(sd, OV7660_VER, &ver_id, 1))
181 return -ENODEV;
182
183 info("Sensor reported 0x%x%x", prod_id, ver_id);
184
185 if ((prod_id == 0x76) && (ver_id == 0x60)) {
186 info("Detected a ov7660 sensor");
187 goto sensor_found;
188 }
189 return -ENODEV;
190
191sensor_found:
192 sensor_settings = kmalloc(
193 ARRAY_SIZE(ov7660_ctrls) * sizeof(s32), GFP_KERNEL);
194 if (!sensor_settings)
195 return -ENOMEM;
196
197 sd->gspca_dev.cam.cam_mode = ov7660_modes;
198 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(ov7660_modes);
199 sd->desc->ctrls = ov7660_ctrls;
200 sd->desc->nctrls = ARRAY_SIZE(ov7660_ctrls);
201
202 for (i = 0; i < ARRAY_SIZE(ov7660_ctrls); i++)
203 sensor_settings[i] = ov7660_ctrls[i].qctrl.default_value;
204 sd->sensor_priv = sensor_settings;
205
206 return 0;
207}
208
209int ov7660_init(struct sd *sd)
210{
211 int i, err = 0;
212 s32 *sensor_settings = sd->sensor_priv;
213
214 /* Init the sensor */
215 for (i = 0; i < ARRAY_SIZE(init_ov7660); i++) {
216 u8 data[2];
217
218 if (init_ov7660[i][0] == BRIDGE) {
219 err = m5602_write_bridge(sd,
220 init_ov7660[i][1],
221 init_ov7660[i][2]);
222 } else {
223 data[0] = init_ov7660[i][2];
224 err = m5602_write_sensor(sd,
225 init_ov7660[i][1], data, 1);
226 }
227 }
228
229 if (dump_sensor)
230 ov7660_dump_registers(sd);
231
232 err = ov7660_set_gain(&sd->gspca_dev, sensor_settings[GAIN_IDX]);
233 if (err < 0)
234 return err;
235
236 err = ov7660_set_auto_white_balance(&sd->gspca_dev,
237 sensor_settings[AUTO_WHITE_BALANCE_IDX]);
238 if (err < 0)
239 return err;
240
241 err = ov7660_set_auto_gain(&sd->gspca_dev,
242 sensor_settings[AUTO_GAIN_CTRL_IDX]);
243 if (err < 0)
244 return err;
245
246 err = ov7660_set_auto_exposure(&sd->gspca_dev,
247 sensor_settings[AUTO_EXPOSURE_IDX]);
248 if (err < 0)
249 return err;
250 err = ov7660_set_hflip(&sd->gspca_dev,
251 sensor_settings[HFLIP_IDX]);
252 if (err < 0)
253 return err;
254
255 err = ov7660_set_vflip(&sd->gspca_dev,
256 sensor_settings[VFLIP_IDX]);
257
258 return err;
259}
260
261int ov7660_start(struct sd *sd)
262{
263 return 0;
264}
265
266int ov7660_stop(struct sd *sd)
267{
268 return 0;
269}
270
271void ov7660_disconnect(struct sd *sd)
272{
273 ov7660_stop(sd);
274
275 sd->sensor = NULL;
276 kfree(sd->sensor_priv);
277}
278
279static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
280{
281 struct sd *sd = (struct sd *) gspca_dev;
282 s32 *sensor_settings = sd->sensor_priv;
283
284 *val = sensor_settings[GAIN_IDX];
285 PDEBUG(D_V4L2, "Read gain %d", *val);
286 return 0;
287}
288
289static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val)
290{
291 int err;
292 u8 i2c_data;
293 struct sd *sd = (struct sd *) gspca_dev;
294 s32 *sensor_settings = sd->sensor_priv;
295
296 PDEBUG(D_V4L2, "Setting gain to %d", val);
297
298 sensor_settings[GAIN_IDX] = val;
299
300 err = m5602_write_sensor(sd, OV7660_GAIN, &i2c_data, 1);
301 return err;
302}
303
304
305static int ov7660_get_auto_white_balance(struct gspca_dev *gspca_dev,
306 __s32 *val)
307{
308 struct sd *sd = (struct sd *) gspca_dev;
309 s32 *sensor_settings = sd->sensor_priv;
310
311 *val = sensor_settings[AUTO_WHITE_BALANCE_IDX];
312 return 0;
313}
314
315static int ov7660_set_auto_white_balance(struct gspca_dev *gspca_dev,
316 __s32 val)
317{
318 int err;
319 u8 i2c_data;
320 struct sd *sd = (struct sd *) gspca_dev;
321 s32 *sensor_settings = sd->sensor_priv;
322
323 PDEBUG(D_V4L2, "Set auto white balance to %d", val);
324
325 sensor_settings[AUTO_WHITE_BALANCE_IDX] = val;
326 err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
327 if (err < 0)
328 return err;
329
330 i2c_data = ((i2c_data & 0xfd) | ((val & 0x01) << 1));
331 err = m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
332
333 return err;
334}
335
336static int ov7660_get_auto_gain(struct gspca_dev *gspca_dev, __s32 *val)
337{
338 struct sd *sd = (struct sd *) gspca_dev;
339 s32 *sensor_settings = sd->sensor_priv;
340
341 *val = sensor_settings[AUTO_GAIN_CTRL_IDX];
342 PDEBUG(D_V4L2, "Read auto gain control %d", *val);
343 return 0;
344}
345
346static int ov7660_set_auto_gain(struct gspca_dev *gspca_dev, __s32 val)
347{
348 int err;
349 u8 i2c_data;
350 struct sd *sd = (struct sd *) gspca_dev;
351 s32 *sensor_settings = sd->sensor_priv;
352
353 PDEBUG(D_V4L2, "Set auto gain control to %d", val);
354
355 sensor_settings[AUTO_GAIN_CTRL_IDX] = val;
356 err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
357 if (err < 0)
358 return err;
359
360 i2c_data = ((i2c_data & 0xfb) | ((val & 0x01) << 2));
361
362 return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
363}
364
365static int ov7660_get_auto_exposure(struct gspca_dev *gspca_dev, __s32 *val)
366{
367 struct sd *sd = (struct sd *) gspca_dev;
368 s32 *sensor_settings = sd->sensor_priv;
369
370 *val = sensor_settings[AUTO_EXPOSURE_IDX];
371 PDEBUG(D_V4L2, "Read auto exposure control %d", *val);
372 return 0;
373}
374
375static int ov7660_set_auto_exposure(struct gspca_dev *gspca_dev,
376 __s32 val)
377{
378 int err;
379 u8 i2c_data;
380 struct sd *sd = (struct sd *) gspca_dev;
381 s32 *sensor_settings = sd->sensor_priv;
382
383 PDEBUG(D_V4L2, "Set auto exposure control to %d", val);
384
385 sensor_settings[AUTO_EXPOSURE_IDX] = val;
386 err = m5602_read_sensor(sd, OV7660_COM8, &i2c_data, 1);
387 if (err < 0)
388 return err;
389
390 i2c_data = ((i2c_data & 0xfe) | ((val & 0x01) << 0));
391
392 return m5602_write_sensor(sd, OV7660_COM8, &i2c_data, 1);
393}
394
395static int ov7660_get_hflip(struct gspca_dev *gspca_dev, __s32 *val)
396{
397 struct sd *sd = (struct sd *) gspca_dev;
398 s32 *sensor_settings = sd->sensor_priv;
399
400 *val = sensor_settings[HFLIP_IDX];
401 PDEBUG(D_V4L2, "Read horizontal flip %d", *val);
402 return 0;
403}
404
405static int ov7660_set_hflip(struct gspca_dev *gspca_dev, __s32 val)
406{
407 int err;
408 u8 i2c_data;
409 struct sd *sd = (struct sd *) gspca_dev;
410 s32 *sensor_settings = sd->sensor_priv;
411
412 PDEBUG(D_V4L2, "Set horizontal flip to %d", val);
413
414 sensor_settings[HFLIP_IDX] = val;
415
416 i2c_data = ((val & 0x01) << 5) |
417 (sensor_settings[VFLIP_IDX] << 4);
418
419 err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1);
420
421 return err;
422}
423
424static int ov7660_get_vflip(struct gspca_dev *gspca_dev, __s32 *val)
425{
426 struct sd *sd = (struct sd *) gspca_dev;
427 s32 *sensor_settings = sd->sensor_priv;
428
429 *val = sensor_settings[VFLIP_IDX];
430 PDEBUG(D_V4L2, "Read vertical flip %d", *val);
431
432 return 0;
433}
434
435static int ov7660_set_vflip(struct gspca_dev *gspca_dev, __s32 val)
436{
437 int err;
438 u8 i2c_data;
439 struct sd *sd = (struct sd *) gspca_dev;
440 s32 *sensor_settings = sd->sensor_priv;
441
442 PDEBUG(D_V4L2, "Set vertical flip to %d", val);
443 sensor_settings[VFLIP_IDX] = val;
444
445 i2c_data = ((val & 0x01) << 4) | (sensor_settings[VFLIP_IDX] << 5);
446 err = m5602_write_sensor(sd, OV7660_MVFP, &i2c_data, 1);
447 if (err < 0)
448 return err;
449
450 /* When vflip is toggled we need to readjust the bridge hsync/vsync */
451 if (gspca_dev->streaming)
452 err = ov7660_start(sd);
453
454 return err;
455}
456
457static void ov7660_dump_registers(struct sd *sd)
458{
459 int address;
460 info("Dumping the ov7660 register state");
461 for (address = 0; address < 0xa9; address++) {
462 u8 value;
463 m5602_read_sensor(sd, address, &value, 1);
464 info("register 0x%x contains 0x%x",
465 address, value);
466 }
467
468 info("ov7660 register state dump complete");
469
470 info("Probing for which registers that are read/write");
471 for (address = 0; address < 0xff; address++) {
472 u8 old_value, ctrl_value;
473 u8 test_value[2] = {0xff, 0xff};
474
475 m5602_read_sensor(sd, address, &old_value, 1);
476 m5602_write_sensor(sd, address, test_value, 1);
477 m5602_read_sensor(sd, address, &ctrl_value, 1);
478
479 if (ctrl_value == test_value[0])
480 info("register 0x%x is writeable", address);
481 else
482 info("register 0x%x is read only", address);
483
484 /* Restore original value */
485 m5602_write_sensor(sd, address, &old_value, 1);
486 }
487}
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