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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[deliverable/linux.git] / drivers / media / i2c / mt9v032.c
1 /*
2 * Driver for MT9V032 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2010, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
5 *
6 * Based on the MT9M001 driver,
7 *
8 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/i2c.h>
17 #include <linux/log2.h>
18 #include <linux/mutex.h>
19 #include <linux/slab.h>
20 #include <linux/videodev2.h>
21 #include <linux/v4l2-mediabus.h>
22 #include <linux/module.h>
23
24 #include <media/mt9v032.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-subdev.h>
28
29 #define MT9V032_PIXEL_ARRAY_HEIGHT 492
30 #define MT9V032_PIXEL_ARRAY_WIDTH 782
31
32 #define MT9V032_SYSCLK_FREQ_DEF 26600000
33
34 #define MT9V032_CHIP_VERSION 0x00
35 #define MT9V032_CHIP_ID_REV1 0x1311
36 #define MT9V032_CHIP_ID_REV3 0x1313
37 #define MT9V032_COLUMN_START 0x01
38 #define MT9V032_COLUMN_START_MIN 1
39 #define MT9V032_COLUMN_START_DEF 1
40 #define MT9V032_COLUMN_START_MAX 752
41 #define MT9V032_ROW_START 0x02
42 #define MT9V032_ROW_START_MIN 4
43 #define MT9V032_ROW_START_DEF 5
44 #define MT9V032_ROW_START_MAX 482
45 #define MT9V032_WINDOW_HEIGHT 0x03
46 #define MT9V032_WINDOW_HEIGHT_MIN 1
47 #define MT9V032_WINDOW_HEIGHT_DEF 480
48 #define MT9V032_WINDOW_HEIGHT_MAX 480
49 #define MT9V032_WINDOW_WIDTH 0x04
50 #define MT9V032_WINDOW_WIDTH_MIN 1
51 #define MT9V032_WINDOW_WIDTH_DEF 752
52 #define MT9V032_WINDOW_WIDTH_MAX 752
53 #define MT9V032_HORIZONTAL_BLANKING 0x05
54 #define MT9V032_HORIZONTAL_BLANKING_MIN 43
55 #define MT9V032_HORIZONTAL_BLANKING_DEF 94
56 #define MT9V032_HORIZONTAL_BLANKING_MAX 1023
57 #define MT9V032_VERTICAL_BLANKING 0x06
58 #define MT9V032_VERTICAL_BLANKING_MIN 4
59 #define MT9V032_VERTICAL_BLANKING_DEF 45
60 #define MT9V032_VERTICAL_BLANKING_MAX 3000
61 #define MT9V032_CHIP_CONTROL 0x07
62 #define MT9V032_CHIP_CONTROL_MASTER_MODE (1 << 3)
63 #define MT9V032_CHIP_CONTROL_DOUT_ENABLE (1 << 7)
64 #define MT9V032_CHIP_CONTROL_SEQUENTIAL (1 << 8)
65 #define MT9V032_SHUTTER_WIDTH1 0x08
66 #define MT9V032_SHUTTER_WIDTH2 0x09
67 #define MT9V032_SHUTTER_WIDTH_CONTROL 0x0a
68 #define MT9V032_TOTAL_SHUTTER_WIDTH 0x0b
69 #define MT9V032_TOTAL_SHUTTER_WIDTH_MIN 1
70 #define MT9V032_TOTAL_SHUTTER_WIDTH_DEF 480
71 #define MT9V032_TOTAL_SHUTTER_WIDTH_MAX 32767
72 #define MT9V032_RESET 0x0c
73 #define MT9V032_READ_MODE 0x0d
74 #define MT9V032_READ_MODE_ROW_BIN_MASK (3 << 0)
75 #define MT9V032_READ_MODE_ROW_BIN_SHIFT 0
76 #define MT9V032_READ_MODE_COLUMN_BIN_MASK (3 << 2)
77 #define MT9V032_READ_MODE_COLUMN_BIN_SHIFT 2
78 #define MT9V032_READ_MODE_ROW_FLIP (1 << 4)
79 #define MT9V032_READ_MODE_COLUMN_FLIP (1 << 5)
80 #define MT9V032_READ_MODE_DARK_COLUMNS (1 << 6)
81 #define MT9V032_READ_MODE_DARK_ROWS (1 << 7)
82 #define MT9V032_PIXEL_OPERATION_MODE 0x0f
83 #define MT9V032_PIXEL_OPERATION_MODE_COLOR (1 << 2)
84 #define MT9V032_PIXEL_OPERATION_MODE_HDR (1 << 6)
85 #define MT9V032_ANALOG_GAIN 0x35
86 #define MT9V032_ANALOG_GAIN_MIN 16
87 #define MT9V032_ANALOG_GAIN_DEF 16
88 #define MT9V032_ANALOG_GAIN_MAX 64
89 #define MT9V032_MAX_ANALOG_GAIN 0x36
90 #define MT9V032_MAX_ANALOG_GAIN_MAX 127
91 #define MT9V032_FRAME_DARK_AVERAGE 0x42
92 #define MT9V032_DARK_AVG_THRESH 0x46
93 #define MT9V032_DARK_AVG_LOW_THRESH_MASK (255 << 0)
94 #define MT9V032_DARK_AVG_LOW_THRESH_SHIFT 0
95 #define MT9V032_DARK_AVG_HIGH_THRESH_MASK (255 << 8)
96 #define MT9V032_DARK_AVG_HIGH_THRESH_SHIFT 8
97 #define MT9V032_ROW_NOISE_CORR_CONTROL 0x70
98 #define MT9V032_ROW_NOISE_CORR_ENABLE (1 << 5)
99 #define MT9V032_ROW_NOISE_CORR_USE_BLK_AVG (1 << 7)
100 #define MT9V032_PIXEL_CLOCK 0x74
101 #define MT9V032_PIXEL_CLOCK_INV_LINE (1 << 0)
102 #define MT9V032_PIXEL_CLOCK_INV_FRAME (1 << 1)
103 #define MT9V032_PIXEL_CLOCK_XOR_LINE (1 << 2)
104 #define MT9V032_PIXEL_CLOCK_CONT_LINE (1 << 3)
105 #define MT9V032_PIXEL_CLOCK_INV_PXL_CLK (1 << 4)
106 #define MT9V032_TEST_PATTERN 0x7f
107 #define MT9V032_TEST_PATTERN_DATA_MASK (1023 << 0)
108 #define MT9V032_TEST_PATTERN_DATA_SHIFT 0
109 #define MT9V032_TEST_PATTERN_USE_DATA (1 << 10)
110 #define MT9V032_TEST_PATTERN_GRAY_MASK (3 << 11)
111 #define MT9V032_TEST_PATTERN_GRAY_NONE (0 << 11)
112 #define MT9V032_TEST_PATTERN_GRAY_VERTICAL (1 << 11)
113 #define MT9V032_TEST_PATTERN_GRAY_HORIZONTAL (2 << 11)
114 #define MT9V032_TEST_PATTERN_GRAY_DIAGONAL (3 << 11)
115 #define MT9V032_TEST_PATTERN_ENABLE (1 << 13)
116 #define MT9V032_TEST_PATTERN_FLIP (1 << 14)
117 #define MT9V032_AEC_AGC_ENABLE 0xaf
118 #define MT9V032_AEC_ENABLE (1 << 0)
119 #define MT9V032_AGC_ENABLE (1 << 1)
120 #define MT9V032_THERMAL_INFO 0xc1
121
122 struct mt9v032 {
123 struct v4l2_subdev subdev;
124 struct media_pad pad;
125
126 struct v4l2_mbus_framefmt format;
127 struct v4l2_rect crop;
128
129 struct v4l2_ctrl_handler ctrls;
130 struct {
131 struct v4l2_ctrl *link_freq;
132 struct v4l2_ctrl *pixel_rate;
133 };
134
135 struct mutex power_lock;
136 int power_count;
137
138 struct mt9v032_platform_data *pdata;
139
140 u32 sysclk;
141 u16 chip_control;
142 u16 aec_agc;
143 u16 hblank;
144 };
145
146 static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
147 {
148 return container_of(sd, struct mt9v032, subdev);
149 }
150
151 static int mt9v032_read(struct i2c_client *client, const u8 reg)
152 {
153 s32 data = i2c_smbus_read_word_swapped(client, reg);
154 dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__,
155 data, reg);
156 return data;
157 }
158
159 static int mt9v032_write(struct i2c_client *client, const u8 reg,
160 const u16 data)
161 {
162 dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__,
163 data, reg);
164 return i2c_smbus_write_word_swapped(client, reg, data);
165 }
166
167 static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set)
168 {
169 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
170 u16 value = (mt9v032->chip_control & ~clear) | set;
171 int ret;
172
173 ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value);
174 if (ret < 0)
175 return ret;
176
177 mt9v032->chip_control = value;
178 return 0;
179 }
180
181 static int
182 mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
183 {
184 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
185 u16 value = mt9v032->aec_agc;
186 int ret;
187
188 if (enable)
189 value |= which;
190 else
191 value &= ~which;
192
193 ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value);
194 if (ret < 0)
195 return ret;
196
197 mt9v032->aec_agc = value;
198 return 0;
199 }
200
201 static int
202 mt9v032_update_hblank(struct mt9v032 *mt9v032)
203 {
204 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
205 struct v4l2_rect *crop = &mt9v032->crop;
206
207 return mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING,
208 max_t(s32, mt9v032->hblank, 660 - crop->width));
209 }
210
211 #define EXT_CLK 25000000
212
213 static int mt9v032_power_on(struct mt9v032 *mt9v032)
214 {
215 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
216 int ret;
217
218 if (mt9v032->pdata->set_clock) {
219 mt9v032->pdata->set_clock(&mt9v032->subdev, mt9v032->sysclk);
220 udelay(1);
221 }
222
223 /* Reset the chip and stop data read out */
224 ret = mt9v032_write(client, MT9V032_RESET, 1);
225 if (ret < 0)
226 return ret;
227
228 ret = mt9v032_write(client, MT9V032_RESET, 0);
229 if (ret < 0)
230 return ret;
231
232 return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0);
233 }
234
235 static void mt9v032_power_off(struct mt9v032 *mt9v032)
236 {
237 if (mt9v032->pdata->set_clock)
238 mt9v032->pdata->set_clock(&mt9v032->subdev, 0);
239 }
240
241 static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on)
242 {
243 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
244 int ret;
245
246 if (!on) {
247 mt9v032_power_off(mt9v032);
248 return 0;
249 }
250
251 ret = mt9v032_power_on(mt9v032);
252 if (ret < 0)
253 return ret;
254
255 /* Configure the pixel clock polarity */
256 if (mt9v032->pdata && mt9v032->pdata->clk_pol) {
257 ret = mt9v032_write(client, MT9V032_PIXEL_CLOCK,
258 MT9V032_PIXEL_CLOCK_INV_PXL_CLK);
259 if (ret < 0)
260 return ret;
261 }
262
263 /* Disable the noise correction algorithm and restore the controls. */
264 ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0);
265 if (ret < 0)
266 return ret;
267
268 return v4l2_ctrl_handler_setup(&mt9v032->ctrls);
269 }
270
271 /* -----------------------------------------------------------------------------
272 * V4L2 subdev video operations
273 */
274
275 static struct v4l2_mbus_framefmt *
276 __mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
277 unsigned int pad, enum v4l2_subdev_format_whence which)
278 {
279 switch (which) {
280 case V4L2_SUBDEV_FORMAT_TRY:
281 return v4l2_subdev_get_try_format(fh, pad);
282 case V4L2_SUBDEV_FORMAT_ACTIVE:
283 return &mt9v032->format;
284 default:
285 return NULL;
286 }
287 }
288
289 static struct v4l2_rect *
290 __mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
291 unsigned int pad, enum v4l2_subdev_format_whence which)
292 {
293 switch (which) {
294 case V4L2_SUBDEV_FORMAT_TRY:
295 return v4l2_subdev_get_try_crop(fh, pad);
296 case V4L2_SUBDEV_FORMAT_ACTIVE:
297 return &mt9v032->crop;
298 default:
299 return NULL;
300 }
301 }
302
303 static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
304 {
305 const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE
306 | MT9V032_CHIP_CONTROL_DOUT_ENABLE
307 | MT9V032_CHIP_CONTROL_SEQUENTIAL;
308 struct i2c_client *client = v4l2_get_subdevdata(subdev);
309 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
310 struct v4l2_mbus_framefmt *format = &mt9v032->format;
311 struct v4l2_rect *crop = &mt9v032->crop;
312 unsigned int hratio;
313 unsigned int vratio;
314 int ret;
315
316 if (!enable)
317 return mt9v032_set_chip_control(mt9v032, mode, 0);
318
319 /* Configure the window size and row/column bin */
320 hratio = DIV_ROUND_CLOSEST(crop->width, format->width);
321 vratio = DIV_ROUND_CLOSEST(crop->height, format->height);
322
323 ret = mt9v032_write(client, MT9V032_READ_MODE,
324 (hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT |
325 (vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT);
326 if (ret < 0)
327 return ret;
328
329 ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left);
330 if (ret < 0)
331 return ret;
332
333 ret = mt9v032_write(client, MT9V032_ROW_START, crop->top);
334 if (ret < 0)
335 return ret;
336
337 ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width);
338 if (ret < 0)
339 return ret;
340
341 ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height);
342 if (ret < 0)
343 return ret;
344
345 ret = mt9v032_update_hblank(mt9v032);
346 if (ret < 0)
347 return ret;
348
349 /* Switch to master "normal" mode */
350 return mt9v032_set_chip_control(mt9v032, 0, mode);
351 }
352
353 static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev,
354 struct v4l2_subdev_fh *fh,
355 struct v4l2_subdev_mbus_code_enum *code)
356 {
357 if (code->index > 0)
358 return -EINVAL;
359
360 code->code = V4L2_MBUS_FMT_SGRBG10_1X10;
361 return 0;
362 }
363
364 static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
365 struct v4l2_subdev_fh *fh,
366 struct v4l2_subdev_frame_size_enum *fse)
367 {
368 if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
369 return -EINVAL;
370
371 fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index;
372 fse->max_width = fse->min_width;
373 fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index;
374 fse->max_height = fse->min_height;
375
376 return 0;
377 }
378
379 static int mt9v032_get_format(struct v4l2_subdev *subdev,
380 struct v4l2_subdev_fh *fh,
381 struct v4l2_subdev_format *format)
382 {
383 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
384
385 format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad,
386 format->which);
387 return 0;
388 }
389
390 static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032,
391 unsigned int hratio)
392 {
393 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
394 int ret;
395
396 ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate,
397 mt9v032->sysclk / hratio);
398 if (ret < 0)
399 dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
400 }
401
402 static int mt9v032_set_format(struct v4l2_subdev *subdev,
403 struct v4l2_subdev_fh *fh,
404 struct v4l2_subdev_format *format)
405 {
406 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
407 struct v4l2_mbus_framefmt *__format;
408 struct v4l2_rect *__crop;
409 unsigned int width;
410 unsigned int height;
411 unsigned int hratio;
412 unsigned int vratio;
413
414 __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad,
415 format->which);
416
417 /* Clamp the width and height to avoid dividing by zero. */
418 width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
419 max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
420 __crop->width);
421 height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
422 max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
423 __crop->height);
424
425 hratio = DIV_ROUND_CLOSEST(__crop->width, width);
426 vratio = DIV_ROUND_CLOSEST(__crop->height, height);
427
428 __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
429 format->which);
430 __format->width = __crop->width / hratio;
431 __format->height = __crop->height / vratio;
432 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
433 mt9v032_configure_pixel_rate(mt9v032, hratio);
434
435 format->format = *__format;
436
437 return 0;
438 }
439
440 static int mt9v032_get_crop(struct v4l2_subdev *subdev,
441 struct v4l2_subdev_fh *fh,
442 struct v4l2_subdev_crop *crop)
443 {
444 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
445
446 crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad,
447 crop->which);
448 return 0;
449 }
450
451 static int mt9v032_set_crop(struct v4l2_subdev *subdev,
452 struct v4l2_subdev_fh *fh,
453 struct v4l2_subdev_crop *crop)
454 {
455 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
456 struct v4l2_mbus_framefmt *__format;
457 struct v4l2_rect *__crop;
458 struct v4l2_rect rect;
459
460 /* Clamp the crop rectangle boundaries and align them to a non multiple
461 * of 2 pixels to ensure a GRBG Bayer pattern.
462 */
463 rect.left = clamp(ALIGN(crop->rect.left + 1, 2) - 1,
464 MT9V032_COLUMN_START_MIN,
465 MT9V032_COLUMN_START_MAX);
466 rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
467 MT9V032_ROW_START_MIN,
468 MT9V032_ROW_START_MAX);
469 rect.width = clamp(ALIGN(crop->rect.width, 2),
470 MT9V032_WINDOW_WIDTH_MIN,
471 MT9V032_WINDOW_WIDTH_MAX);
472 rect.height = clamp(ALIGN(crop->rect.height, 2),
473 MT9V032_WINDOW_HEIGHT_MIN,
474 MT9V032_WINDOW_HEIGHT_MAX);
475
476 rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
477 rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
478
479 __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
480
481 if (rect.width != __crop->width || rect.height != __crop->height) {
482 /* Reset the output image size if the crop rectangle size has
483 * been modified.
484 */
485 __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad,
486 crop->which);
487 __format->width = rect.width;
488 __format->height = rect.height;
489 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
490 mt9v032_configure_pixel_rate(mt9v032, 1);
491 }
492
493 *__crop = rect;
494 crop->rect = rect;
495
496 return 0;
497 }
498
499 /* -----------------------------------------------------------------------------
500 * V4L2 subdev control operations
501 */
502
503 #define V4L2_CID_TEST_PATTERN (V4L2_CID_USER_BASE | 0x1001)
504
505 static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
506 {
507 struct mt9v032 *mt9v032 =
508 container_of(ctrl->handler, struct mt9v032, ctrls);
509 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
510 u32 freq;
511 u16 data;
512
513 switch (ctrl->id) {
514 case V4L2_CID_AUTOGAIN:
515 return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE,
516 ctrl->val);
517
518 case V4L2_CID_GAIN:
519 return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val);
520
521 case V4L2_CID_EXPOSURE_AUTO:
522 return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE,
523 !ctrl->val);
524
525 case V4L2_CID_EXPOSURE:
526 return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH,
527 ctrl->val);
528
529 case V4L2_CID_HBLANK:
530 mt9v032->hblank = ctrl->val;
531 return mt9v032_update_hblank(mt9v032);
532
533 case V4L2_CID_VBLANK:
534 return mt9v032_write(client, MT9V032_VERTICAL_BLANKING,
535 ctrl->val);
536
537 case V4L2_CID_PIXEL_RATE:
538 case V4L2_CID_LINK_FREQ:
539 if (mt9v032->link_freq == NULL)
540 break;
541
542 freq = mt9v032->pdata->link_freqs[mt9v032->link_freq->val];
543 mt9v032->pixel_rate->val64 = freq;
544 mt9v032->sysclk = freq;
545 break;
546
547 case V4L2_CID_TEST_PATTERN:
548 switch (ctrl->val) {
549 case 0:
550 data = 0;
551 break;
552 case 1:
553 data = MT9V032_TEST_PATTERN_GRAY_VERTICAL
554 | MT9V032_TEST_PATTERN_ENABLE;
555 break;
556 case 2:
557 data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL
558 | MT9V032_TEST_PATTERN_ENABLE;
559 break;
560 case 3:
561 data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL
562 | MT9V032_TEST_PATTERN_ENABLE;
563 break;
564 default:
565 data = (ctrl->val << MT9V032_TEST_PATTERN_DATA_SHIFT)
566 | MT9V032_TEST_PATTERN_USE_DATA
567 | MT9V032_TEST_PATTERN_ENABLE
568 | MT9V032_TEST_PATTERN_FLIP;
569 break;
570 }
571
572 return mt9v032_write(client, MT9V032_TEST_PATTERN, data);
573 }
574
575 return 0;
576 }
577
578 static struct v4l2_ctrl_ops mt9v032_ctrl_ops = {
579 .s_ctrl = mt9v032_s_ctrl,
580 };
581
582 static const struct v4l2_ctrl_config mt9v032_ctrls[] = {
583 {
584 .ops = &mt9v032_ctrl_ops,
585 .id = V4L2_CID_TEST_PATTERN,
586 .type = V4L2_CTRL_TYPE_INTEGER,
587 .name = "Test pattern",
588 .min = 0,
589 .max = 1023,
590 .step = 1,
591 .def = 0,
592 .flags = 0,
593 }
594 };
595
596 /* -----------------------------------------------------------------------------
597 * V4L2 subdev core operations
598 */
599
600 static int mt9v032_set_power(struct v4l2_subdev *subdev, int on)
601 {
602 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
603 int ret = 0;
604
605 mutex_lock(&mt9v032->power_lock);
606
607 /* If the power count is modified from 0 to != 0 or from != 0 to 0,
608 * update the power state.
609 */
610 if (mt9v032->power_count == !on) {
611 ret = __mt9v032_set_power(mt9v032, !!on);
612 if (ret < 0)
613 goto done;
614 }
615
616 /* Update the power count. */
617 mt9v032->power_count += on ? 1 : -1;
618 WARN_ON(mt9v032->power_count < 0);
619
620 done:
621 mutex_unlock(&mt9v032->power_lock);
622 return ret;
623 }
624
625 /* -----------------------------------------------------------------------------
626 * V4L2 subdev internal operations
627 */
628
629 static int mt9v032_registered(struct v4l2_subdev *subdev)
630 {
631 struct i2c_client *client = v4l2_get_subdevdata(subdev);
632 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
633 s32 data;
634 int ret;
635
636 dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n",
637 client->addr);
638
639 ret = mt9v032_power_on(mt9v032);
640 if (ret < 0) {
641 dev_err(&client->dev, "MT9V032 power up failed\n");
642 return ret;
643 }
644
645 /* Read and check the sensor version */
646 data = mt9v032_read(client, MT9V032_CHIP_VERSION);
647 if (data != MT9V032_CHIP_ID_REV1 && data != MT9V032_CHIP_ID_REV3) {
648 dev_err(&client->dev, "MT9V032 not detected, wrong version "
649 "0x%04x\n", data);
650 return -ENODEV;
651 }
652
653 mt9v032_power_off(mt9v032);
654
655 dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n",
656 client->addr);
657
658 mt9v032_configure_pixel_rate(mt9v032, 1);
659
660 return ret;
661 }
662
663 static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
664 {
665 struct v4l2_mbus_framefmt *format;
666 struct v4l2_rect *crop;
667
668 crop = v4l2_subdev_get_try_crop(fh, 0);
669 crop->left = MT9V032_COLUMN_START_DEF;
670 crop->top = MT9V032_ROW_START_DEF;
671 crop->width = MT9V032_WINDOW_WIDTH_DEF;
672 crop->height = MT9V032_WINDOW_HEIGHT_DEF;
673
674 format = v4l2_subdev_get_try_format(fh, 0);
675 format->code = V4L2_MBUS_FMT_SGRBG10_1X10;
676 format->width = MT9V032_WINDOW_WIDTH_DEF;
677 format->height = MT9V032_WINDOW_HEIGHT_DEF;
678 format->field = V4L2_FIELD_NONE;
679 format->colorspace = V4L2_COLORSPACE_SRGB;
680
681 return mt9v032_set_power(subdev, 1);
682 }
683
684 static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
685 {
686 return mt9v032_set_power(subdev, 0);
687 }
688
689 static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
690 .s_power = mt9v032_set_power,
691 };
692
693 static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
694 .s_stream = mt9v032_s_stream,
695 };
696
697 static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
698 .enum_mbus_code = mt9v032_enum_mbus_code,
699 .enum_frame_size = mt9v032_enum_frame_size,
700 .get_fmt = mt9v032_get_format,
701 .set_fmt = mt9v032_set_format,
702 .get_crop = mt9v032_get_crop,
703 .set_crop = mt9v032_set_crop,
704 };
705
706 static struct v4l2_subdev_ops mt9v032_subdev_ops = {
707 .core = &mt9v032_subdev_core_ops,
708 .video = &mt9v032_subdev_video_ops,
709 .pad = &mt9v032_subdev_pad_ops,
710 };
711
712 static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
713 .registered = mt9v032_registered,
714 .open = mt9v032_open,
715 .close = mt9v032_close,
716 };
717
718 /* -----------------------------------------------------------------------------
719 * Driver initialization and probing
720 */
721
722 static int mt9v032_probe(struct i2c_client *client,
723 const struct i2c_device_id *did)
724 {
725 struct mt9v032_platform_data *pdata = client->dev.platform_data;
726 struct mt9v032 *mt9v032;
727 unsigned int i;
728 int ret;
729
730 if (!i2c_check_functionality(client->adapter,
731 I2C_FUNC_SMBUS_WORD_DATA)) {
732 dev_warn(&client->adapter->dev,
733 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
734 return -EIO;
735 }
736
737 mt9v032 = kzalloc(sizeof(*mt9v032), GFP_KERNEL);
738 if (!mt9v032)
739 return -ENOMEM;
740
741 mutex_init(&mt9v032->power_lock);
742 mt9v032->pdata = pdata;
743
744 v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 8);
745
746 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
747 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
748 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
749 V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN,
750 MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF);
751 v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops,
752 V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
753 V4L2_EXPOSURE_AUTO);
754 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
755 V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
756 MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1,
757 MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
758 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
759 V4L2_CID_HBLANK, MT9V032_HORIZONTAL_BLANKING_MIN,
760 MT9V032_HORIZONTAL_BLANKING_MAX, 1,
761 MT9V032_HORIZONTAL_BLANKING_DEF);
762 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
763 V4L2_CID_VBLANK, MT9V032_VERTICAL_BLANKING_MIN,
764 MT9V032_VERTICAL_BLANKING_MAX, 1,
765 MT9V032_VERTICAL_BLANKING_DEF);
766
767 mt9v032->pixel_rate =
768 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
769 V4L2_CID_PIXEL_RATE, 0, 0, 1, 0);
770
771 if (pdata && pdata->link_freqs) {
772 unsigned int def = 0;
773
774 for (i = 0; pdata->link_freqs[i]; ++i) {
775 if (pdata->link_freqs[i] == pdata->link_def_freq)
776 def = i;
777 }
778
779 mt9v032->link_freq =
780 v4l2_ctrl_new_int_menu(&mt9v032->ctrls,
781 &mt9v032_ctrl_ops,
782 V4L2_CID_LINK_FREQ, i - 1, def,
783 pdata->link_freqs);
784 v4l2_ctrl_cluster(2, &mt9v032->link_freq);
785 }
786
787 for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i)
788 v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL);
789
790 mt9v032->subdev.ctrl_handler = &mt9v032->ctrls;
791
792 if (mt9v032->ctrls.error)
793 printk(KERN_INFO "%s: control initialization error %d\n",
794 __func__, mt9v032->ctrls.error);
795
796 mt9v032->crop.left = MT9V032_COLUMN_START_DEF;
797 mt9v032->crop.top = MT9V032_ROW_START_DEF;
798 mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF;
799 mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF;
800
801 mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
802 mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF;
803 mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF;
804 mt9v032->format.field = V4L2_FIELD_NONE;
805 mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
806
807 mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
808 mt9v032->hblank = MT9V032_HORIZONTAL_BLANKING_DEF;
809 mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF;
810
811 v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
812 mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;
813 mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
814
815 mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE;
816 ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0);
817 if (ret < 0)
818 kfree(mt9v032);
819
820 return ret;
821 }
822
823 static int mt9v032_remove(struct i2c_client *client)
824 {
825 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
826 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
827
828 v4l2_device_unregister_subdev(subdev);
829 media_entity_cleanup(&subdev->entity);
830 kfree(mt9v032);
831 return 0;
832 }
833
834 static const struct i2c_device_id mt9v032_id[] = {
835 { "mt9v032", 0 },
836 { }
837 };
838 MODULE_DEVICE_TABLE(i2c, mt9v032_id);
839
840 static struct i2c_driver mt9v032_driver = {
841 .driver = {
842 .name = "mt9v032",
843 },
844 .probe = mt9v032_probe,
845 .remove = mt9v032_remove,
846 .id_table = mt9v032_id,
847 };
848
849 module_i2c_driver(mt9v032_driver);
850
851 MODULE_DESCRIPTION("Aptina MT9V032 Camera driver");
852 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
853 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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