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Merge branch 'smack-for-3.16' of git://git.gitorious.org/smack-next/kernel into next
[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/clk.h>
16 #include <linux/delay.h>
17 #include <linux/i2c.h>
18 #include <linux/log2.h>
19 #include <linux/mutex.h>
20 #include <linux/slab.h>
21 #include <linux/videodev2.h>
22 #include <linux/v4l2-mediabus.h>
23 #include <linux/module.h>
24
25 #include <media/mt9v032.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-subdev.h>
29
30 /* The first four rows are black rows. The active area spans 753x481 pixels. */
31 #define MT9V032_PIXEL_ARRAY_HEIGHT 485
32 #define MT9V032_PIXEL_ARRAY_WIDTH 753
33
34 #define MT9V032_SYSCLK_FREQ_DEF 26600000
35
36 #define MT9V032_CHIP_VERSION 0x00
37 #define MT9V032_CHIP_ID_REV1 0x1311
38 #define MT9V032_CHIP_ID_REV3 0x1313
39 #define MT9V034_CHIP_ID_REV1 0X1324
40 #define MT9V032_COLUMN_START 0x01
41 #define MT9V032_COLUMN_START_MIN 1
42 #define MT9V032_COLUMN_START_DEF 1
43 #define MT9V032_COLUMN_START_MAX 752
44 #define MT9V032_ROW_START 0x02
45 #define MT9V032_ROW_START_MIN 4
46 #define MT9V032_ROW_START_DEF 5
47 #define MT9V032_ROW_START_MAX 482
48 #define MT9V032_WINDOW_HEIGHT 0x03
49 #define MT9V032_WINDOW_HEIGHT_MIN 1
50 #define MT9V032_WINDOW_HEIGHT_DEF 480
51 #define MT9V032_WINDOW_HEIGHT_MAX 480
52 #define MT9V032_WINDOW_WIDTH 0x04
53 #define MT9V032_WINDOW_WIDTH_MIN 1
54 #define MT9V032_WINDOW_WIDTH_DEF 752
55 #define MT9V032_WINDOW_WIDTH_MAX 752
56 #define MT9V032_HORIZONTAL_BLANKING 0x05
57 #define MT9V032_HORIZONTAL_BLANKING_MIN 43
58 #define MT9V034_HORIZONTAL_BLANKING_MIN 61
59 #define MT9V032_HORIZONTAL_BLANKING_DEF 94
60 #define MT9V032_HORIZONTAL_BLANKING_MAX 1023
61 #define MT9V032_VERTICAL_BLANKING 0x06
62 #define MT9V032_VERTICAL_BLANKING_MIN 4
63 #define MT9V034_VERTICAL_BLANKING_MIN 2
64 #define MT9V032_VERTICAL_BLANKING_DEF 45
65 #define MT9V032_VERTICAL_BLANKING_MAX 3000
66 #define MT9V034_VERTICAL_BLANKING_MAX 32288
67 #define MT9V032_CHIP_CONTROL 0x07
68 #define MT9V032_CHIP_CONTROL_MASTER_MODE (1 << 3)
69 #define MT9V032_CHIP_CONTROL_DOUT_ENABLE (1 << 7)
70 #define MT9V032_CHIP_CONTROL_SEQUENTIAL (1 << 8)
71 #define MT9V032_SHUTTER_WIDTH1 0x08
72 #define MT9V032_SHUTTER_WIDTH2 0x09
73 #define MT9V032_SHUTTER_WIDTH_CONTROL 0x0a
74 #define MT9V032_TOTAL_SHUTTER_WIDTH 0x0b
75 #define MT9V032_TOTAL_SHUTTER_WIDTH_MIN 1
76 #define MT9V034_TOTAL_SHUTTER_WIDTH_MIN 0
77 #define MT9V032_TOTAL_SHUTTER_WIDTH_DEF 480
78 #define MT9V032_TOTAL_SHUTTER_WIDTH_MAX 32767
79 #define MT9V034_TOTAL_SHUTTER_WIDTH_MAX 32765
80 #define MT9V032_RESET 0x0c
81 #define MT9V032_READ_MODE 0x0d
82 #define MT9V032_READ_MODE_ROW_BIN_MASK (3 << 0)
83 #define MT9V032_READ_MODE_ROW_BIN_SHIFT 0
84 #define MT9V032_READ_MODE_COLUMN_BIN_MASK (3 << 2)
85 #define MT9V032_READ_MODE_COLUMN_BIN_SHIFT 2
86 #define MT9V032_READ_MODE_ROW_FLIP (1 << 4)
87 #define MT9V032_READ_MODE_COLUMN_FLIP (1 << 5)
88 #define MT9V032_READ_MODE_DARK_COLUMNS (1 << 6)
89 #define MT9V032_READ_MODE_DARK_ROWS (1 << 7)
90 #define MT9V032_PIXEL_OPERATION_MODE 0x0f
91 #define MT9V034_PIXEL_OPERATION_MODE_HDR (1 << 0)
92 #define MT9V034_PIXEL_OPERATION_MODE_COLOR (1 << 1)
93 #define MT9V032_PIXEL_OPERATION_MODE_COLOR (1 << 2)
94 #define MT9V032_PIXEL_OPERATION_MODE_HDR (1 << 6)
95 #define MT9V032_ANALOG_GAIN 0x35
96 #define MT9V032_ANALOG_GAIN_MIN 16
97 #define MT9V032_ANALOG_GAIN_DEF 16
98 #define MT9V032_ANALOG_GAIN_MAX 64
99 #define MT9V032_MAX_ANALOG_GAIN 0x36
100 #define MT9V032_MAX_ANALOG_GAIN_MAX 127
101 #define MT9V032_FRAME_DARK_AVERAGE 0x42
102 #define MT9V032_DARK_AVG_THRESH 0x46
103 #define MT9V032_DARK_AVG_LOW_THRESH_MASK (255 << 0)
104 #define MT9V032_DARK_AVG_LOW_THRESH_SHIFT 0
105 #define MT9V032_DARK_AVG_HIGH_THRESH_MASK (255 << 8)
106 #define MT9V032_DARK_AVG_HIGH_THRESH_SHIFT 8
107 #define MT9V032_ROW_NOISE_CORR_CONTROL 0x70
108 #define MT9V034_ROW_NOISE_CORR_ENABLE (1 << 0)
109 #define MT9V034_ROW_NOISE_CORR_USE_BLK_AVG (1 << 1)
110 #define MT9V032_ROW_NOISE_CORR_ENABLE (1 << 5)
111 #define MT9V032_ROW_NOISE_CORR_USE_BLK_AVG (1 << 7)
112 #define MT9V032_PIXEL_CLOCK 0x74
113 #define MT9V034_PIXEL_CLOCK 0x72
114 #define MT9V032_PIXEL_CLOCK_INV_LINE (1 << 0)
115 #define MT9V032_PIXEL_CLOCK_INV_FRAME (1 << 1)
116 #define MT9V032_PIXEL_CLOCK_XOR_LINE (1 << 2)
117 #define MT9V032_PIXEL_CLOCK_CONT_LINE (1 << 3)
118 #define MT9V032_PIXEL_CLOCK_INV_PXL_CLK (1 << 4)
119 #define MT9V032_TEST_PATTERN 0x7f
120 #define MT9V032_TEST_PATTERN_DATA_MASK (1023 << 0)
121 #define MT9V032_TEST_PATTERN_DATA_SHIFT 0
122 #define MT9V032_TEST_PATTERN_USE_DATA (1 << 10)
123 #define MT9V032_TEST_PATTERN_GRAY_MASK (3 << 11)
124 #define MT9V032_TEST_PATTERN_GRAY_NONE (0 << 11)
125 #define MT9V032_TEST_PATTERN_GRAY_VERTICAL (1 << 11)
126 #define MT9V032_TEST_PATTERN_GRAY_HORIZONTAL (2 << 11)
127 #define MT9V032_TEST_PATTERN_GRAY_DIAGONAL (3 << 11)
128 #define MT9V032_TEST_PATTERN_ENABLE (1 << 13)
129 #define MT9V032_TEST_PATTERN_FLIP (1 << 14)
130 #define MT9V032_AEC_AGC_ENABLE 0xaf
131 #define MT9V032_AEC_ENABLE (1 << 0)
132 #define MT9V032_AGC_ENABLE (1 << 1)
133 #define MT9V032_THERMAL_INFO 0xc1
134
135 enum mt9v032_model {
136 MT9V032_MODEL_V032_COLOR,
137 MT9V032_MODEL_V032_MONO,
138 MT9V032_MODEL_V034_COLOR,
139 MT9V032_MODEL_V034_MONO,
140 };
141
142 struct mt9v032_model_version {
143 unsigned int version;
144 const char *name;
145 };
146
147 struct mt9v032_model_data {
148 unsigned int min_row_time;
149 unsigned int min_hblank;
150 unsigned int min_vblank;
151 unsigned int max_vblank;
152 unsigned int min_shutter;
153 unsigned int max_shutter;
154 unsigned int pclk_reg;
155 };
156
157 struct mt9v032_model_info {
158 const struct mt9v032_model_data *data;
159 bool color;
160 };
161
162 static const struct mt9v032_model_version mt9v032_versions[] = {
163 { MT9V032_CHIP_ID_REV1, "MT9V032 rev1/2" },
164 { MT9V032_CHIP_ID_REV3, "MT9V032 rev3" },
165 { MT9V034_CHIP_ID_REV1, "MT9V034 rev1" },
166 };
167
168 static const struct mt9v032_model_data mt9v032_model_data[] = {
169 {
170 /* MT9V032 revisions 1/2/3 */
171 .min_row_time = 660,
172 .min_hblank = MT9V032_HORIZONTAL_BLANKING_MIN,
173 .min_vblank = MT9V032_VERTICAL_BLANKING_MIN,
174 .max_vblank = MT9V032_VERTICAL_BLANKING_MAX,
175 .min_shutter = MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
176 .max_shutter = MT9V032_TOTAL_SHUTTER_WIDTH_MAX,
177 .pclk_reg = MT9V032_PIXEL_CLOCK,
178 }, {
179 /* MT9V034 */
180 .min_row_time = 690,
181 .min_hblank = MT9V034_HORIZONTAL_BLANKING_MIN,
182 .min_vblank = MT9V034_VERTICAL_BLANKING_MIN,
183 .max_vblank = MT9V034_VERTICAL_BLANKING_MAX,
184 .min_shutter = MT9V034_TOTAL_SHUTTER_WIDTH_MIN,
185 .max_shutter = MT9V034_TOTAL_SHUTTER_WIDTH_MAX,
186 .pclk_reg = MT9V034_PIXEL_CLOCK,
187 },
188 };
189
190 static const struct mt9v032_model_info mt9v032_models[] = {
191 [MT9V032_MODEL_V032_COLOR] = {
192 .data = &mt9v032_model_data[0],
193 .color = true,
194 },
195 [MT9V032_MODEL_V032_MONO] = {
196 .data = &mt9v032_model_data[0],
197 .color = false,
198 },
199 [MT9V032_MODEL_V034_COLOR] = {
200 .data = &mt9v032_model_data[1],
201 .color = true,
202 },
203 [MT9V032_MODEL_V034_MONO] = {
204 .data = &mt9v032_model_data[1],
205 .color = false,
206 },
207 };
208
209 struct mt9v032 {
210 struct v4l2_subdev subdev;
211 struct media_pad pad;
212
213 struct v4l2_mbus_framefmt format;
214 struct v4l2_rect crop;
215 unsigned int hratio;
216 unsigned int vratio;
217
218 struct v4l2_ctrl_handler ctrls;
219 struct {
220 struct v4l2_ctrl *link_freq;
221 struct v4l2_ctrl *pixel_rate;
222 };
223
224 struct mutex power_lock;
225 int power_count;
226
227 struct clk *clk;
228
229 struct mt9v032_platform_data *pdata;
230 const struct mt9v032_model_info *model;
231 const struct mt9v032_model_version *version;
232
233 u32 sysclk;
234 u16 chip_control;
235 u16 aec_agc;
236 u16 hblank;
237 struct {
238 struct v4l2_ctrl *test_pattern;
239 struct v4l2_ctrl *test_pattern_color;
240 };
241 };
242
243 static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
244 {
245 return container_of(sd, struct mt9v032, subdev);
246 }
247
248 static int mt9v032_read(struct i2c_client *client, const u8 reg)
249 {
250 s32 data = i2c_smbus_read_word_swapped(client, reg);
251 dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__,
252 data, reg);
253 return data;
254 }
255
256 static int mt9v032_write(struct i2c_client *client, const u8 reg,
257 const u16 data)
258 {
259 dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__,
260 data, reg);
261 return i2c_smbus_write_word_swapped(client, reg, data);
262 }
263
264 static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set)
265 {
266 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
267 u16 value = (mt9v032->chip_control & ~clear) | set;
268 int ret;
269
270 ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value);
271 if (ret < 0)
272 return ret;
273
274 mt9v032->chip_control = value;
275 return 0;
276 }
277
278 static int
279 mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
280 {
281 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
282 u16 value = mt9v032->aec_agc;
283 int ret;
284
285 if (enable)
286 value |= which;
287 else
288 value &= ~which;
289
290 ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value);
291 if (ret < 0)
292 return ret;
293
294 mt9v032->aec_agc = value;
295 return 0;
296 }
297
298 static int
299 mt9v032_update_hblank(struct mt9v032 *mt9v032)
300 {
301 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
302 struct v4l2_rect *crop = &mt9v032->crop;
303 unsigned int min_hblank = mt9v032->model->data->min_hblank;
304 unsigned int hblank;
305
306 if (mt9v032->version->version == MT9V034_CHIP_ID_REV1)
307 min_hblank += (mt9v032->hratio - 1) * 10;
308 min_hblank = max_t(unsigned int, (int)mt9v032->model->data->min_row_time - crop->width,
309 (int)min_hblank);
310 hblank = max_t(unsigned int, mt9v032->hblank, min_hblank);
311
312 return mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING, hblank);
313 }
314
315 static int mt9v032_power_on(struct mt9v032 *mt9v032)
316 {
317 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
318 int ret;
319
320 clk_set_rate(mt9v032->clk, mt9v032->sysclk);
321 clk_prepare_enable(mt9v032->clk);
322 udelay(1);
323
324 /* Reset the chip and stop data read out */
325 ret = mt9v032_write(client, MT9V032_RESET, 1);
326 if (ret < 0)
327 return ret;
328
329 ret = mt9v032_write(client, MT9V032_RESET, 0);
330 if (ret < 0)
331 return ret;
332
333 return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0);
334 }
335
336 static void mt9v032_power_off(struct mt9v032 *mt9v032)
337 {
338 clk_disable_unprepare(mt9v032->clk);
339 }
340
341 static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on)
342 {
343 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
344 int ret;
345
346 if (!on) {
347 mt9v032_power_off(mt9v032);
348 return 0;
349 }
350
351 ret = mt9v032_power_on(mt9v032);
352 if (ret < 0)
353 return ret;
354
355 /* Configure the pixel clock polarity */
356 if (mt9v032->pdata && mt9v032->pdata->clk_pol) {
357 ret = mt9v032_write(client, mt9v032->model->data->pclk_reg,
358 MT9V032_PIXEL_CLOCK_INV_PXL_CLK);
359 if (ret < 0)
360 return ret;
361 }
362
363 /* Disable the noise correction algorithm and restore the controls. */
364 ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0);
365 if (ret < 0)
366 return ret;
367
368 return v4l2_ctrl_handler_setup(&mt9v032->ctrls);
369 }
370
371 /* -----------------------------------------------------------------------------
372 * V4L2 subdev video operations
373 */
374
375 static struct v4l2_mbus_framefmt *
376 __mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
377 unsigned int pad, enum v4l2_subdev_format_whence which)
378 {
379 switch (which) {
380 case V4L2_SUBDEV_FORMAT_TRY:
381 return v4l2_subdev_get_try_format(fh, pad);
382 case V4L2_SUBDEV_FORMAT_ACTIVE:
383 return &mt9v032->format;
384 default:
385 return NULL;
386 }
387 }
388
389 static struct v4l2_rect *
390 __mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
391 unsigned int pad, enum v4l2_subdev_format_whence which)
392 {
393 switch (which) {
394 case V4L2_SUBDEV_FORMAT_TRY:
395 return v4l2_subdev_get_try_crop(fh, pad);
396 case V4L2_SUBDEV_FORMAT_ACTIVE:
397 return &mt9v032->crop;
398 default:
399 return NULL;
400 }
401 }
402
403 static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
404 {
405 const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE
406 | MT9V032_CHIP_CONTROL_DOUT_ENABLE
407 | MT9V032_CHIP_CONTROL_SEQUENTIAL;
408 struct i2c_client *client = v4l2_get_subdevdata(subdev);
409 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
410 struct v4l2_rect *crop = &mt9v032->crop;
411 unsigned int hbin;
412 unsigned int vbin;
413 int ret;
414
415 if (!enable)
416 return mt9v032_set_chip_control(mt9v032, mode, 0);
417
418 /* Configure the window size and row/column bin */
419 hbin = fls(mt9v032->hratio) - 1;
420 vbin = fls(mt9v032->vratio) - 1;
421 ret = mt9v032_write(client, MT9V032_READ_MODE,
422 hbin << MT9V032_READ_MODE_COLUMN_BIN_SHIFT |
423 vbin << MT9V032_READ_MODE_ROW_BIN_SHIFT);
424 if (ret < 0)
425 return ret;
426
427 ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left);
428 if (ret < 0)
429 return ret;
430
431 ret = mt9v032_write(client, MT9V032_ROW_START, crop->top);
432 if (ret < 0)
433 return ret;
434
435 ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width);
436 if (ret < 0)
437 return ret;
438
439 ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height);
440 if (ret < 0)
441 return ret;
442
443 ret = mt9v032_update_hblank(mt9v032);
444 if (ret < 0)
445 return ret;
446
447 /* Switch to master "normal" mode */
448 return mt9v032_set_chip_control(mt9v032, 0, mode);
449 }
450
451 static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev,
452 struct v4l2_subdev_fh *fh,
453 struct v4l2_subdev_mbus_code_enum *code)
454 {
455 if (code->index > 0)
456 return -EINVAL;
457
458 code->code = V4L2_MBUS_FMT_SGRBG10_1X10;
459 return 0;
460 }
461
462 static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
463 struct v4l2_subdev_fh *fh,
464 struct v4l2_subdev_frame_size_enum *fse)
465 {
466 if (fse->index >= 3 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
467 return -EINVAL;
468
469 fse->min_width = MT9V032_WINDOW_WIDTH_DEF / (1 << fse->index);
470 fse->max_width = fse->min_width;
471 fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / (1 << fse->index);
472 fse->max_height = fse->min_height;
473
474 return 0;
475 }
476
477 static int mt9v032_get_format(struct v4l2_subdev *subdev,
478 struct v4l2_subdev_fh *fh,
479 struct v4l2_subdev_format *format)
480 {
481 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
482
483 format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad,
484 format->which);
485 return 0;
486 }
487
488 static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032)
489 {
490 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
491 int ret;
492
493 ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate,
494 mt9v032->sysclk / mt9v032->hratio);
495 if (ret < 0)
496 dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
497 }
498
499 static unsigned int mt9v032_calc_ratio(unsigned int input, unsigned int output)
500 {
501 /* Compute the power-of-two binning factor closest to the input size to
502 * output size ratio. Given that the output size is bounded by input/4
503 * and input, a generic implementation would be an ineffective luxury.
504 */
505 if (output * 3 > input * 2)
506 return 1;
507 if (output * 3 > input)
508 return 2;
509 return 4;
510 }
511
512 static int mt9v032_set_format(struct v4l2_subdev *subdev,
513 struct v4l2_subdev_fh *fh,
514 struct v4l2_subdev_format *format)
515 {
516 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
517 struct v4l2_mbus_framefmt *__format;
518 struct v4l2_rect *__crop;
519 unsigned int width;
520 unsigned int height;
521 unsigned int hratio;
522 unsigned int vratio;
523
524 __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad,
525 format->which);
526
527 /* Clamp the width and height to avoid dividing by zero. */
528 width = clamp(ALIGN(format->format.width, 2),
529 max_t(unsigned int, __crop->width / 4,
530 MT9V032_WINDOW_WIDTH_MIN),
531 __crop->width);
532 height = clamp(ALIGN(format->format.height, 2),
533 max_t(unsigned int, __crop->height / 4,
534 MT9V032_WINDOW_HEIGHT_MIN),
535 __crop->height);
536
537 hratio = mt9v032_calc_ratio(__crop->width, width);
538 vratio = mt9v032_calc_ratio(__crop->height, height);
539
540 __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
541 format->which);
542 __format->width = __crop->width / hratio;
543 __format->height = __crop->height / vratio;
544
545 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
546 mt9v032->hratio = hratio;
547 mt9v032->vratio = vratio;
548 mt9v032_configure_pixel_rate(mt9v032);
549 }
550
551 format->format = *__format;
552
553 return 0;
554 }
555
556 static int mt9v032_get_crop(struct v4l2_subdev *subdev,
557 struct v4l2_subdev_fh *fh,
558 struct v4l2_subdev_crop *crop)
559 {
560 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
561
562 crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad,
563 crop->which);
564 return 0;
565 }
566
567 static int mt9v032_set_crop(struct v4l2_subdev *subdev,
568 struct v4l2_subdev_fh *fh,
569 struct v4l2_subdev_crop *crop)
570 {
571 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
572 struct v4l2_mbus_framefmt *__format;
573 struct v4l2_rect *__crop;
574 struct v4l2_rect rect;
575
576 /* Clamp the crop rectangle boundaries and align them to a non multiple
577 * of 2 pixels to ensure a GRBG Bayer pattern.
578 */
579 rect.left = clamp(ALIGN(crop->rect.left + 1, 2) - 1,
580 MT9V032_COLUMN_START_MIN,
581 MT9V032_COLUMN_START_MAX);
582 rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
583 MT9V032_ROW_START_MIN,
584 MT9V032_ROW_START_MAX);
585 rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
586 MT9V032_WINDOW_WIDTH_MIN,
587 MT9V032_WINDOW_WIDTH_MAX);
588 rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
589 MT9V032_WINDOW_HEIGHT_MIN,
590 MT9V032_WINDOW_HEIGHT_MAX);
591
592 rect.width = min_t(unsigned int,
593 rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
594 rect.height = min_t(unsigned int,
595 rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
596
597 __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
598
599 if (rect.width != __crop->width || rect.height != __crop->height) {
600 /* Reset the output image size if the crop rectangle size has
601 * been modified.
602 */
603 __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad,
604 crop->which);
605 __format->width = rect.width;
606 __format->height = rect.height;
607 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
608 mt9v032->hratio = 1;
609 mt9v032->vratio = 1;
610 mt9v032_configure_pixel_rate(mt9v032);
611 }
612 }
613
614 *__crop = rect;
615 crop->rect = rect;
616
617 return 0;
618 }
619
620 /* -----------------------------------------------------------------------------
621 * V4L2 subdev control operations
622 */
623
624 #define V4L2_CID_TEST_PATTERN_COLOR (V4L2_CID_USER_BASE | 0x1001)
625
626 static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
627 {
628 struct mt9v032 *mt9v032 =
629 container_of(ctrl->handler, struct mt9v032, ctrls);
630 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
631 u32 freq;
632 u16 data;
633
634 switch (ctrl->id) {
635 case V4L2_CID_AUTOGAIN:
636 return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE,
637 ctrl->val);
638
639 case V4L2_CID_GAIN:
640 return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val);
641
642 case V4L2_CID_EXPOSURE_AUTO:
643 return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE,
644 !ctrl->val);
645
646 case V4L2_CID_EXPOSURE:
647 return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH,
648 ctrl->val);
649
650 case V4L2_CID_HBLANK:
651 mt9v032->hblank = ctrl->val;
652 return mt9v032_update_hblank(mt9v032);
653
654 case V4L2_CID_VBLANK:
655 return mt9v032_write(client, MT9V032_VERTICAL_BLANKING,
656 ctrl->val);
657
658 case V4L2_CID_PIXEL_RATE:
659 case V4L2_CID_LINK_FREQ:
660 if (mt9v032->link_freq == NULL)
661 break;
662
663 freq = mt9v032->pdata->link_freqs[mt9v032->link_freq->val];
664 mt9v032->pixel_rate->val64 = freq;
665 mt9v032->sysclk = freq;
666 break;
667
668 case V4L2_CID_TEST_PATTERN:
669 switch (mt9v032->test_pattern->val) {
670 case 0:
671 data = 0;
672 break;
673 case 1:
674 data = MT9V032_TEST_PATTERN_GRAY_VERTICAL
675 | MT9V032_TEST_PATTERN_ENABLE;
676 break;
677 case 2:
678 data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL
679 | MT9V032_TEST_PATTERN_ENABLE;
680 break;
681 case 3:
682 data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL
683 | MT9V032_TEST_PATTERN_ENABLE;
684 break;
685 default:
686 data = (mt9v032->test_pattern_color->val <<
687 MT9V032_TEST_PATTERN_DATA_SHIFT)
688 | MT9V032_TEST_PATTERN_USE_DATA
689 | MT9V032_TEST_PATTERN_ENABLE
690 | MT9V032_TEST_PATTERN_FLIP;
691 break;
692 }
693 return mt9v032_write(client, MT9V032_TEST_PATTERN, data);
694 }
695
696 return 0;
697 }
698
699 static struct v4l2_ctrl_ops mt9v032_ctrl_ops = {
700 .s_ctrl = mt9v032_s_ctrl,
701 };
702
703 static const char * const mt9v032_test_pattern_menu[] = {
704 "Disabled",
705 "Gray Vertical Shade",
706 "Gray Horizontal Shade",
707 "Gray Diagonal Shade",
708 "Plain",
709 };
710
711 static const struct v4l2_ctrl_config mt9v032_test_pattern_color = {
712 .ops = &mt9v032_ctrl_ops,
713 .id = V4L2_CID_TEST_PATTERN_COLOR,
714 .type = V4L2_CTRL_TYPE_INTEGER,
715 .name = "Test Pattern Color",
716 .min = 0,
717 .max = 1023,
718 .step = 1,
719 .def = 0,
720 .flags = 0,
721 };
722
723 /* -----------------------------------------------------------------------------
724 * V4L2 subdev core operations
725 */
726
727 static int mt9v032_set_power(struct v4l2_subdev *subdev, int on)
728 {
729 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
730 int ret = 0;
731
732 mutex_lock(&mt9v032->power_lock);
733
734 /* If the power count is modified from 0 to != 0 or from != 0 to 0,
735 * update the power state.
736 */
737 if (mt9v032->power_count == !on) {
738 ret = __mt9v032_set_power(mt9v032, !!on);
739 if (ret < 0)
740 goto done;
741 }
742
743 /* Update the power count. */
744 mt9v032->power_count += on ? 1 : -1;
745 WARN_ON(mt9v032->power_count < 0);
746
747 done:
748 mutex_unlock(&mt9v032->power_lock);
749 return ret;
750 }
751
752 /* -----------------------------------------------------------------------------
753 * V4L2 subdev internal operations
754 */
755
756 static int mt9v032_registered(struct v4l2_subdev *subdev)
757 {
758 struct i2c_client *client = v4l2_get_subdevdata(subdev);
759 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
760 unsigned int i;
761 s32 version;
762 int ret;
763
764 dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n",
765 client->addr);
766
767 ret = mt9v032_power_on(mt9v032);
768 if (ret < 0) {
769 dev_err(&client->dev, "MT9V032 power up failed\n");
770 return ret;
771 }
772
773 /* Read and check the sensor version */
774 version = mt9v032_read(client, MT9V032_CHIP_VERSION);
775 if (version < 0) {
776 dev_err(&client->dev, "Failed reading chip version\n");
777 return version;
778 }
779
780 for (i = 0; i < ARRAY_SIZE(mt9v032_versions); ++i) {
781 if (mt9v032_versions[i].version == version) {
782 mt9v032->version = &mt9v032_versions[i];
783 break;
784 }
785 }
786
787 if (mt9v032->version == NULL) {
788 dev_err(&client->dev, "Unsupported chip version 0x%04x\n",
789 version);
790 return -ENODEV;
791 }
792
793 mt9v032_power_off(mt9v032);
794
795 dev_info(&client->dev, "%s detected at address 0x%02x\n",
796 mt9v032->version->name, client->addr);
797
798 mt9v032_configure_pixel_rate(mt9v032);
799
800 return ret;
801 }
802
803 static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
804 {
805 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
806 struct v4l2_mbus_framefmt *format;
807 struct v4l2_rect *crop;
808
809 crop = v4l2_subdev_get_try_crop(fh, 0);
810 crop->left = MT9V032_COLUMN_START_DEF;
811 crop->top = MT9V032_ROW_START_DEF;
812 crop->width = MT9V032_WINDOW_WIDTH_DEF;
813 crop->height = MT9V032_WINDOW_HEIGHT_DEF;
814
815 format = v4l2_subdev_get_try_format(fh, 0);
816
817 if (mt9v032->model->color)
818 format->code = V4L2_MBUS_FMT_SGRBG10_1X10;
819 else
820 format->code = V4L2_MBUS_FMT_Y10_1X10;
821
822 format->width = MT9V032_WINDOW_WIDTH_DEF;
823 format->height = MT9V032_WINDOW_HEIGHT_DEF;
824 format->field = V4L2_FIELD_NONE;
825 format->colorspace = V4L2_COLORSPACE_SRGB;
826
827 return mt9v032_set_power(subdev, 1);
828 }
829
830 static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
831 {
832 return mt9v032_set_power(subdev, 0);
833 }
834
835 static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
836 .s_power = mt9v032_set_power,
837 };
838
839 static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
840 .s_stream = mt9v032_s_stream,
841 };
842
843 static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
844 .enum_mbus_code = mt9v032_enum_mbus_code,
845 .enum_frame_size = mt9v032_enum_frame_size,
846 .get_fmt = mt9v032_get_format,
847 .set_fmt = mt9v032_set_format,
848 .get_crop = mt9v032_get_crop,
849 .set_crop = mt9v032_set_crop,
850 };
851
852 static struct v4l2_subdev_ops mt9v032_subdev_ops = {
853 .core = &mt9v032_subdev_core_ops,
854 .video = &mt9v032_subdev_video_ops,
855 .pad = &mt9v032_subdev_pad_ops,
856 };
857
858 static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
859 .registered = mt9v032_registered,
860 .open = mt9v032_open,
861 .close = mt9v032_close,
862 };
863
864 /* -----------------------------------------------------------------------------
865 * Driver initialization and probing
866 */
867
868 static int mt9v032_probe(struct i2c_client *client,
869 const struct i2c_device_id *did)
870 {
871 struct mt9v032_platform_data *pdata = client->dev.platform_data;
872 struct mt9v032 *mt9v032;
873 unsigned int i;
874 int ret;
875
876 if (!i2c_check_functionality(client->adapter,
877 I2C_FUNC_SMBUS_WORD_DATA)) {
878 dev_warn(&client->adapter->dev,
879 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
880 return -EIO;
881 }
882
883 mt9v032 = devm_kzalloc(&client->dev, sizeof(*mt9v032), GFP_KERNEL);
884 if (!mt9v032)
885 return -ENOMEM;
886
887 mt9v032->clk = devm_clk_get(&client->dev, NULL);
888 if (IS_ERR(mt9v032->clk))
889 return PTR_ERR(mt9v032->clk);
890
891 mutex_init(&mt9v032->power_lock);
892 mt9v032->pdata = pdata;
893 mt9v032->model = (const void *)did->driver_data;
894
895 v4l2_ctrl_handler_init(&mt9v032->ctrls, 10);
896
897 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
898 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
899 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
900 V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN,
901 MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF);
902 v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops,
903 V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
904 V4L2_EXPOSURE_AUTO);
905 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
906 V4L2_CID_EXPOSURE, mt9v032->model->data->min_shutter,
907 mt9v032->model->data->max_shutter, 1,
908 MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
909 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
910 V4L2_CID_HBLANK, mt9v032->model->data->min_hblank,
911 MT9V032_HORIZONTAL_BLANKING_MAX, 1,
912 MT9V032_HORIZONTAL_BLANKING_DEF);
913 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
914 V4L2_CID_VBLANK, mt9v032->model->data->min_vblank,
915 mt9v032->model->data->max_vblank, 1,
916 MT9V032_VERTICAL_BLANKING_DEF);
917 mt9v032->test_pattern = v4l2_ctrl_new_std_menu_items(&mt9v032->ctrls,
918 &mt9v032_ctrl_ops, V4L2_CID_TEST_PATTERN,
919 ARRAY_SIZE(mt9v032_test_pattern_menu) - 1, 0, 0,
920 mt9v032_test_pattern_menu);
921 mt9v032->test_pattern_color = v4l2_ctrl_new_custom(&mt9v032->ctrls,
922 &mt9v032_test_pattern_color, NULL);
923
924 v4l2_ctrl_cluster(2, &mt9v032->test_pattern);
925
926 mt9v032->pixel_rate =
927 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
928 V4L2_CID_PIXEL_RATE, 0, 0, 1, 0);
929
930 if (pdata && pdata->link_freqs) {
931 unsigned int def = 0;
932
933 for (i = 0; pdata->link_freqs[i]; ++i) {
934 if (pdata->link_freqs[i] == pdata->link_def_freq)
935 def = i;
936 }
937
938 mt9v032->link_freq =
939 v4l2_ctrl_new_int_menu(&mt9v032->ctrls,
940 &mt9v032_ctrl_ops,
941 V4L2_CID_LINK_FREQ, i - 1, def,
942 pdata->link_freqs);
943 v4l2_ctrl_cluster(2, &mt9v032->link_freq);
944 }
945
946
947 mt9v032->subdev.ctrl_handler = &mt9v032->ctrls;
948
949 if (mt9v032->ctrls.error)
950 printk(KERN_INFO "%s: control initialization error %d\n",
951 __func__, mt9v032->ctrls.error);
952
953 mt9v032->crop.left = MT9V032_COLUMN_START_DEF;
954 mt9v032->crop.top = MT9V032_ROW_START_DEF;
955 mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF;
956 mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF;
957
958 if (mt9v032->model->color)
959 mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
960 else
961 mt9v032->format.code = V4L2_MBUS_FMT_Y10_1X10;
962
963 mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF;
964 mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF;
965 mt9v032->format.field = V4L2_FIELD_NONE;
966 mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
967
968 mt9v032->hratio = 1;
969 mt9v032->vratio = 1;
970
971 mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
972 mt9v032->hblank = MT9V032_HORIZONTAL_BLANKING_DEF;
973 mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF;
974
975 v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
976 mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;
977 mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
978
979 mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE;
980 ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0);
981
982 if (ret < 0)
983 v4l2_ctrl_handler_free(&mt9v032->ctrls);
984
985 return ret;
986 }
987
988 static int mt9v032_remove(struct i2c_client *client)
989 {
990 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
991 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
992
993 v4l2_ctrl_handler_free(&mt9v032->ctrls);
994 v4l2_device_unregister_subdev(subdev);
995 media_entity_cleanup(&subdev->entity);
996
997 return 0;
998 }
999
1000 static const struct i2c_device_id mt9v032_id[] = {
1001 { "mt9v032", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V032_COLOR] },
1002 { "mt9v032m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V032_MONO] },
1003 { "mt9v034", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_COLOR] },
1004 { "mt9v034m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_MONO] },
1005 { }
1006 };
1007 MODULE_DEVICE_TABLE(i2c, mt9v032_id);
1008
1009 static struct i2c_driver mt9v032_driver = {
1010 .driver = {
1011 .name = "mt9v032",
1012 },
1013 .probe = mt9v032_probe,
1014 .remove = mt9v032_remove,
1015 .id_table = mt9v032_id,
1016 };
1017
1018 module_i2c_driver(mt9v032_driver);
1019
1020 MODULE_DESCRIPTION("Aptina MT9V032 Camera driver");
1021 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
1022 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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