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target: Perform PROTECT sanity checks for WRITE_SAME
[linux/fpc-iii.git] / drivers / media / i2c / mt9v032.c
blob93687c1e4097f12a91f89fb60d6d2f7f7d58f57d
1 /*
2 * Driver for MT9V022, MT9V024, MT9V032, and MT9V034 CMOS Image Sensors
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/regmap.h>
21 #include <linux/slab.h>
22 #include <linux/videodev2.h>
23 #include <linux/v4l2-mediabus.h>
24 #include <linux/module.h>
25
26 #include <media/mt9v032.h>
27 #include <media/v4l2-ctrls.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-subdev.h>
30
31 /* The first four rows are black rows. The active area spans 753x481 pixels. */
32 #define MT9V032_PIXEL_ARRAY_HEIGHT 485
33 #define MT9V032_PIXEL_ARRAY_WIDTH 753
34
35 #define MT9V032_SYSCLK_FREQ_DEF 26600000
36
37 #define MT9V032_CHIP_VERSION 0x00
38 #define MT9V032_CHIP_ID_REV1 0x1311
39 #define MT9V032_CHIP_ID_REV3 0x1313
40 #define MT9V034_CHIP_ID_REV1 0X1324
41 #define MT9V032_COLUMN_START 0x01
42 #define MT9V032_COLUMN_START_MIN 1
43 #define MT9V032_COLUMN_START_DEF 1
44 #define MT9V032_COLUMN_START_MAX 752
45 #define MT9V032_ROW_START 0x02
46 #define MT9V032_ROW_START_MIN 4
47 #define MT9V032_ROW_START_DEF 5
48 #define MT9V032_ROW_START_MAX 482
49 #define MT9V032_WINDOW_HEIGHT 0x03
50 #define MT9V032_WINDOW_HEIGHT_MIN 1
51 #define MT9V032_WINDOW_HEIGHT_DEF 480
52 #define MT9V032_WINDOW_HEIGHT_MAX 480
53 #define MT9V032_WINDOW_WIDTH 0x04
54 #define MT9V032_WINDOW_WIDTH_MIN 1
55 #define MT9V032_WINDOW_WIDTH_DEF 752
56 #define MT9V032_WINDOW_WIDTH_MAX 752
57 #define MT9V032_HORIZONTAL_BLANKING 0x05
58 #define MT9V032_HORIZONTAL_BLANKING_MIN 43
59 #define MT9V034_HORIZONTAL_BLANKING_MIN 61
60 #define MT9V032_HORIZONTAL_BLANKING_DEF 94
61 #define MT9V032_HORIZONTAL_BLANKING_MAX 1023
62 #define MT9V032_VERTICAL_BLANKING 0x06
63 #define MT9V032_VERTICAL_BLANKING_MIN 4
64 #define MT9V034_VERTICAL_BLANKING_MIN 2
65 #define MT9V032_VERTICAL_BLANKING_DEF 45
66 #define MT9V032_VERTICAL_BLANKING_MAX 3000
67 #define MT9V034_VERTICAL_BLANKING_MAX 32288
68 #define MT9V032_CHIP_CONTROL 0x07
69 #define MT9V032_CHIP_CONTROL_MASTER_MODE (1 << 3)
70 #define MT9V032_CHIP_CONTROL_DOUT_ENABLE (1 << 7)
71 #define MT9V032_CHIP_CONTROL_SEQUENTIAL (1 << 8)
72 #define MT9V032_SHUTTER_WIDTH1 0x08
73 #define MT9V032_SHUTTER_WIDTH2 0x09
74 #define MT9V032_SHUTTER_WIDTH_CONTROL 0x0a
75 #define MT9V032_TOTAL_SHUTTER_WIDTH 0x0b
76 #define MT9V032_TOTAL_SHUTTER_WIDTH_MIN 1
77 #define MT9V034_TOTAL_SHUTTER_WIDTH_MIN 0
78 #define MT9V032_TOTAL_SHUTTER_WIDTH_DEF 480
79 #define MT9V032_TOTAL_SHUTTER_WIDTH_MAX 32767
80 #define MT9V034_TOTAL_SHUTTER_WIDTH_MAX 32765
81 #define MT9V032_RESET 0x0c
82 #define MT9V032_READ_MODE 0x0d
83 #define MT9V032_READ_MODE_ROW_BIN_MASK (3 << 0)
84 #define MT9V032_READ_MODE_ROW_BIN_SHIFT 0
85 #define MT9V032_READ_MODE_COLUMN_BIN_MASK (3 << 2)
86 #define MT9V032_READ_MODE_COLUMN_BIN_SHIFT 2
87 #define MT9V032_READ_MODE_ROW_FLIP (1 << 4)
88 #define MT9V032_READ_MODE_COLUMN_FLIP (1 << 5)
89 #define MT9V032_READ_MODE_DARK_COLUMNS (1 << 6)
90 #define MT9V032_READ_MODE_DARK_ROWS (1 << 7)
91 #define MT9V032_READ_MODE_RESERVED 0x0300
92 #define MT9V032_PIXEL_OPERATION_MODE 0x0f
93 #define MT9V034_PIXEL_OPERATION_MODE_HDR (1 << 0)
94 #define MT9V034_PIXEL_OPERATION_MODE_COLOR (1 << 1)
95 #define MT9V032_PIXEL_OPERATION_MODE_COLOR (1 << 2)
96 #define MT9V032_PIXEL_OPERATION_MODE_HDR (1 << 6)
97 #define MT9V032_ANALOG_GAIN 0x35
98 #define MT9V032_ANALOG_GAIN_MIN 16
99 #define MT9V032_ANALOG_GAIN_DEF 16
100 #define MT9V032_ANALOG_GAIN_MAX 64
101 #define MT9V032_MAX_ANALOG_GAIN 0x36
102 #define MT9V032_MAX_ANALOG_GAIN_MAX 127
103 #define MT9V032_FRAME_DARK_AVERAGE 0x42
104 #define MT9V032_DARK_AVG_THRESH 0x46
105 #define MT9V032_DARK_AVG_LOW_THRESH_MASK (255 << 0)
106 #define MT9V032_DARK_AVG_LOW_THRESH_SHIFT 0
107 #define MT9V032_DARK_AVG_HIGH_THRESH_MASK (255 << 8)
108 #define MT9V032_DARK_AVG_HIGH_THRESH_SHIFT 8
109 #define MT9V032_ROW_NOISE_CORR_CONTROL 0x70
110 #define MT9V034_ROW_NOISE_CORR_ENABLE (1 << 0)
111 #define MT9V034_ROW_NOISE_CORR_USE_BLK_AVG (1 << 1)
112 #define MT9V032_ROW_NOISE_CORR_ENABLE (1 << 5)
113 #define MT9V032_ROW_NOISE_CORR_USE_BLK_AVG (1 << 7)
114 #define MT9V032_PIXEL_CLOCK 0x74
115 #define MT9V034_PIXEL_CLOCK 0x72
116 #define MT9V032_PIXEL_CLOCK_INV_LINE (1 << 0)
117 #define MT9V032_PIXEL_CLOCK_INV_FRAME (1 << 1)
118 #define MT9V032_PIXEL_CLOCK_XOR_LINE (1 << 2)
119 #define MT9V032_PIXEL_CLOCK_CONT_LINE (1 << 3)
120 #define MT9V032_PIXEL_CLOCK_INV_PXL_CLK (1 << 4)
121 #define MT9V032_TEST_PATTERN 0x7f
122 #define MT9V032_TEST_PATTERN_DATA_MASK (1023 << 0)
123 #define MT9V032_TEST_PATTERN_DATA_SHIFT 0
124 #define MT9V032_TEST_PATTERN_USE_DATA (1 << 10)
125 #define MT9V032_TEST_PATTERN_GRAY_MASK (3 << 11)
126 #define MT9V032_TEST_PATTERN_GRAY_NONE (0 << 11)
127 #define MT9V032_TEST_PATTERN_GRAY_VERTICAL (1 << 11)
128 #define MT9V032_TEST_PATTERN_GRAY_HORIZONTAL (2 << 11)
129 #define MT9V032_TEST_PATTERN_GRAY_DIAGONAL (3 << 11)
130 #define MT9V032_TEST_PATTERN_ENABLE (1 << 13)
131 #define MT9V032_TEST_PATTERN_FLIP (1 << 14)
132 #define MT9V032_AEC_AGC_ENABLE 0xaf
133 #define MT9V032_AEC_ENABLE (1 << 0)
134 #define MT9V032_AGC_ENABLE (1 << 1)
135 #define MT9V032_THERMAL_INFO 0xc1
136
137 enum mt9v032_model {
138 MT9V032_MODEL_V022_COLOR, /* MT9V022IX7ATC */
139 MT9V032_MODEL_V022_MONO, /* MT9V022IX7ATM */
140 MT9V032_MODEL_V024_COLOR, /* MT9V024IA7XTC */
141 MT9V032_MODEL_V024_MONO, /* MT9V024IA7XTM */
142 MT9V032_MODEL_V032_COLOR, /* MT9V032C12STM */
143 MT9V032_MODEL_V032_MONO, /* MT9V032C12STC */
144 MT9V032_MODEL_V034_COLOR,
145 MT9V032_MODEL_V034_MONO,
146 };
147
148 struct mt9v032_model_version {
149 unsigned int version;
150 const char *name;
151 };
152
153 struct mt9v032_model_data {
154 unsigned int min_row_time;
155 unsigned int min_hblank;
156 unsigned int min_vblank;
157 unsigned int max_vblank;
158 unsigned int min_shutter;
159 unsigned int max_shutter;
160 unsigned int pclk_reg;
161 };
162
163 struct mt9v032_model_info {
164 const struct mt9v032_model_data *data;
165 bool color;
166 };
167
168 static const struct mt9v032_model_version mt9v032_versions[] = {
169 { MT9V032_CHIP_ID_REV1, "MT9V022/MT9V032 rev1/2" },
170 { MT9V032_CHIP_ID_REV3, "MT9V022/MT9V032 rev3" },
171 { MT9V034_CHIP_ID_REV1, "MT9V024/MT9V034 rev1" },
172 };
173
174 static const struct mt9v032_model_data mt9v032_model_data[] = {
175 {
176 /* MT9V022, MT9V032 revisions 1/2/3 */
177 .min_row_time = 660,
178 .min_hblank = MT9V032_HORIZONTAL_BLANKING_MIN,
179 .min_vblank = MT9V032_VERTICAL_BLANKING_MIN,
180 .max_vblank = MT9V032_VERTICAL_BLANKING_MAX,
181 .min_shutter = MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
182 .max_shutter = MT9V032_TOTAL_SHUTTER_WIDTH_MAX,
183 .pclk_reg = MT9V032_PIXEL_CLOCK,
184 }, {
185 /* MT9V024, MT9V034 */
186 .min_row_time = 690,
187 .min_hblank = MT9V034_HORIZONTAL_BLANKING_MIN,
188 .min_vblank = MT9V034_VERTICAL_BLANKING_MIN,
189 .max_vblank = MT9V034_VERTICAL_BLANKING_MAX,
190 .min_shutter = MT9V034_TOTAL_SHUTTER_WIDTH_MIN,
191 .max_shutter = MT9V034_TOTAL_SHUTTER_WIDTH_MAX,
192 .pclk_reg = MT9V034_PIXEL_CLOCK,
193 },
194 };
195
196 static const struct mt9v032_model_info mt9v032_models[] = {
197 [MT9V032_MODEL_V022_COLOR] = {
198 .data = &mt9v032_model_data[0],
199 .color = true,
200 },
201 [MT9V032_MODEL_V022_MONO] = {
202 .data = &mt9v032_model_data[0],
203 .color = false,
204 },
205 [MT9V032_MODEL_V024_COLOR] = {
206 .data = &mt9v032_model_data[1],
207 .color = true,
208 },
209 [MT9V032_MODEL_V024_MONO] = {
210 .data = &mt9v032_model_data[1],
211 .color = false,
212 },
213 [MT9V032_MODEL_V032_COLOR] = {
214 .data = &mt9v032_model_data[0],
215 .color = true,
216 },
217 [MT9V032_MODEL_V032_MONO] = {
218 .data = &mt9v032_model_data[0],
219 .color = false,
220 },
221 [MT9V032_MODEL_V034_COLOR] = {
222 .data = &mt9v032_model_data[1],
223 .color = true,
224 },
225 [MT9V032_MODEL_V034_MONO] = {
226 .data = &mt9v032_model_data[1],
227 .color = false,
228 },
229 };
230
231 struct mt9v032 {
232 struct v4l2_subdev subdev;
233 struct media_pad pad;
234
235 struct v4l2_mbus_framefmt format;
236 struct v4l2_rect crop;
237 unsigned int hratio;
238 unsigned int vratio;
239
240 struct v4l2_ctrl_handler ctrls;
241 struct {
242 struct v4l2_ctrl *link_freq;
243 struct v4l2_ctrl *pixel_rate;
244 };
245
246 struct mutex power_lock;
247 int power_count;
248
249 struct regmap *regmap;
250 struct clk *clk;
251
252 struct mt9v032_platform_data *pdata;
253 const struct mt9v032_model_info *model;
254 const struct mt9v032_model_version *version;
255
256 u32 sysclk;
257 u16 aec_agc;
258 u16 hblank;
259 struct {
260 struct v4l2_ctrl *test_pattern;
261 struct v4l2_ctrl *test_pattern_color;
262 };
263 };
264
265 static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
266 {
267 return container_of(sd, struct mt9v032, subdev);
268 }
269
270 static int
271 mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
272 {
273 struct regmap *map = mt9v032->regmap;
274 u16 value = mt9v032->aec_agc;
275 int ret;
276
277 if (enable)
278 value |= which;
279 else
280 value &= ~which;
281
282 ret = regmap_write(map, MT9V032_AEC_AGC_ENABLE, value);
283 if (ret < 0)
284 return ret;
285
286 mt9v032->aec_agc = value;
287 return 0;
288 }
289
290 static int
291 mt9v032_update_hblank(struct mt9v032 *mt9v032)
292 {
293 struct v4l2_rect *crop = &mt9v032->crop;
294 unsigned int min_hblank = mt9v032->model->data->min_hblank;
295 unsigned int hblank;
296
297 if (mt9v032->version->version == MT9V034_CHIP_ID_REV1)
298 min_hblank += (mt9v032->hratio - 1) * 10;
299 min_hblank = max_t(int, mt9v032->model->data->min_row_time - crop->width,
300 min_hblank);
301 hblank = max_t(unsigned int, mt9v032->hblank, min_hblank);
302
303 return regmap_write(mt9v032->regmap, MT9V032_HORIZONTAL_BLANKING,
304 hblank);
305 }
306
307 static int mt9v032_power_on(struct mt9v032 *mt9v032)
308 {
309 struct regmap *map = mt9v032->regmap;
310 int ret;
311
312 ret = clk_set_rate(mt9v032->clk, mt9v032->sysclk);
313 if (ret < 0)
314 return ret;
315
316 ret = clk_prepare_enable(mt9v032->clk);
317 if (ret)
318 return ret;
319
320 udelay(1);
321
322 /* Reset the chip and stop data read out */
323 ret = regmap_write(map, MT9V032_RESET, 1);
324 if (ret < 0)
325 return ret;
326
327 ret = regmap_write(map, MT9V032_RESET, 0);
328 if (ret < 0)
329 return ret;
330
331 return regmap_write(map, MT9V032_CHIP_CONTROL, 0);
332 }
333
334 static void mt9v032_power_off(struct mt9v032 *mt9v032)
335 {
336 clk_disable_unprepare(mt9v032->clk);
337 }
338
339 static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on)
340 {
341 struct regmap *map = mt9v032->regmap;
342 int ret;
343
344 if (!on) {
345 mt9v032_power_off(mt9v032);
346 return 0;
347 }
348
349 ret = mt9v032_power_on(mt9v032);
350 if (ret < 0)
351 return ret;
352
353 /* Configure the pixel clock polarity */
354 if (mt9v032->pdata && mt9v032->pdata->clk_pol) {
355 ret = regmap_write(map, mt9v032->model->data->pclk_reg,
356 MT9V032_PIXEL_CLOCK_INV_PXL_CLK);
357 if (ret < 0)
358 return ret;
359 }
360
361 /* Disable the noise correction algorithm and restore the controls. */
362 ret = regmap_write(map, MT9V032_ROW_NOISE_CORR_CONTROL, 0);
363 if (ret < 0)
364 return ret;
365
366 return v4l2_ctrl_handler_setup(&mt9v032->ctrls);
367 }
368
369 /* -----------------------------------------------------------------------------
370 * V4L2 subdev video operations
371 */
372
373 static struct v4l2_mbus_framefmt *
374 __mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
375 unsigned int pad, enum v4l2_subdev_format_whence which)
376 {
377 switch (which) {
378 case V4L2_SUBDEV_FORMAT_TRY:
379 return v4l2_subdev_get_try_format(fh, pad);
380 case V4L2_SUBDEV_FORMAT_ACTIVE:
381 return &mt9v032->format;
382 default:
383 return NULL;
384 }
385 }
386
387 static struct v4l2_rect *
388 __mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
389 unsigned int pad, enum v4l2_subdev_format_whence which)
390 {
391 switch (which) {
392 case V4L2_SUBDEV_FORMAT_TRY:
393 return v4l2_subdev_get_try_crop(fh, pad);
394 case V4L2_SUBDEV_FORMAT_ACTIVE:
395 return &mt9v032->crop;
396 default:
397 return NULL;
398 }
399 }
400
401 static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
402 {
403 const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE
404 | MT9V032_CHIP_CONTROL_DOUT_ENABLE
405 | MT9V032_CHIP_CONTROL_SEQUENTIAL;
406 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
407 struct v4l2_rect *crop = &mt9v032->crop;
408 struct regmap *map = mt9v032->regmap;
409 unsigned int hbin;
410 unsigned int vbin;
411 int ret;
412
413 if (!enable)
414 return regmap_update_bits(map, MT9V032_CHIP_CONTROL, mode, 0);
415
416 /* Configure the window size and row/column bin */
417 hbin = fls(mt9v032->hratio) - 1;
418 vbin = fls(mt9v032->vratio) - 1;
419 ret = regmap_update_bits(map, MT9V032_READ_MODE,
420 ~MT9V032_READ_MODE_RESERVED,
421 hbin << MT9V032_READ_MODE_COLUMN_BIN_SHIFT |
422 vbin << MT9V032_READ_MODE_ROW_BIN_SHIFT);
423 if (ret < 0)
424 return ret;
425
426 ret = regmap_write(map, MT9V032_COLUMN_START, crop->left);
427 if (ret < 0)
428 return ret;
429
430 ret = regmap_write(map, MT9V032_ROW_START, crop->top);
431 if (ret < 0)
432 return ret;
433
434 ret = regmap_write(map, MT9V032_WINDOW_WIDTH, crop->width);
435 if (ret < 0)
436 return ret;
437
438 ret = regmap_write(map, MT9V032_WINDOW_HEIGHT, crop->height);
439 if (ret < 0)
440 return ret;
441
442 ret = mt9v032_update_hblank(mt9v032);
443 if (ret < 0)
444 return ret;
445
446 /* Switch to master "normal" mode */
447 return regmap_update_bits(map, MT9V032_CHIP_CONTROL, mode, mode);
448 }
449
450 static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev,
451 struct v4l2_subdev_fh *fh,
452 struct v4l2_subdev_mbus_code_enum *code)
453 {
454 if (code->index > 0)
455 return -EINVAL;
456
457 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
458 return 0;
459 }
460
461 static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
462 struct v4l2_subdev_fh *fh,
463 struct v4l2_subdev_frame_size_enum *fse)
464 {
465 if (fse->index >= 3 || fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
466 return -EINVAL;
467
468 fse->min_width = MT9V032_WINDOW_WIDTH_DEF / (1 << fse->index);
469 fse->max_width = fse->min_width;
470 fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / (1 << fse->index);
471 fse->max_height = fse->min_height;
472
473 return 0;
474 }
475
476 static int mt9v032_get_format(struct v4l2_subdev *subdev,
477 struct v4l2_subdev_fh *fh,
478 struct v4l2_subdev_format *format)
479 {
480 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
481
482 format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad,
483 format->which);
484 return 0;
485 }
486
487 static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032)
488 {
489 struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
490 int ret;
491
492 ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate,
493 mt9v032->sysclk / mt9v032->hratio);
494 if (ret < 0)
495 dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
496 }
497
498 static unsigned int mt9v032_calc_ratio(unsigned int input, unsigned int output)
499 {
500 /* Compute the power-of-two binning factor closest to the input size to
501 * output size ratio. Given that the output size is bounded by input/4
502 * and input, a generic implementation would be an ineffective luxury.
503 */
504 if (output * 3 > input * 2)
505 return 1;
506 if (output * 3 > input)
507 return 2;
508 return 4;
509 }
510
511 static int mt9v032_set_format(struct v4l2_subdev *subdev,
512 struct v4l2_subdev_fh *fh,
513 struct v4l2_subdev_format *format)
514 {
515 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
516 struct v4l2_mbus_framefmt *__format;
517 struct v4l2_rect *__crop;
518 unsigned int width;
519 unsigned int height;
520 unsigned int hratio;
521 unsigned int vratio;
522
523 __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad,
524 format->which);
525
526 /* Clamp the width and height to avoid dividing by zero. */
527 width = clamp(ALIGN(format->format.width, 2),
528 max_t(unsigned int, __crop->width / 4,
529 MT9V032_WINDOW_WIDTH_MIN),
530 __crop->width);
531 height = clamp(ALIGN(format->format.height, 2),
532 max_t(unsigned int, __crop->height / 4,
533 MT9V032_WINDOW_HEIGHT_MIN),
534 __crop->height);
535
536 hratio = mt9v032_calc_ratio(__crop->width, width);
537 vratio = mt9v032_calc_ratio(__crop->height, height);
538
539 __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
540 format->which);
541 __format->width = __crop->width / hratio;
542 __format->height = __crop->height / vratio;
543
544 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
545 mt9v032->hratio = hratio;
546 mt9v032->vratio = vratio;
547 mt9v032_configure_pixel_rate(mt9v032);
548 }
549
550 format->format = *__format;
551
552 return 0;
553 }
554
555 static int mt9v032_get_crop(struct v4l2_subdev *subdev,
556 struct v4l2_subdev_fh *fh,
557 struct v4l2_subdev_crop *crop)
558 {
559 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
560
561 crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad,
562 crop->which);
563 return 0;
564 }
565
566 static int mt9v032_set_crop(struct v4l2_subdev *subdev,
567 struct v4l2_subdev_fh *fh,
568 struct v4l2_subdev_crop *crop)
569 {
570 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
571 struct v4l2_mbus_framefmt *__format;
572 struct v4l2_rect *__crop;
573 struct v4l2_rect rect;
574
575 /* Clamp the crop rectangle boundaries and align them to a non multiple
576 * of 2 pixels to ensure a GRBG Bayer pattern.
577 */
578 rect.left = clamp(ALIGN(crop->rect.left + 1, 2) - 1,
579 MT9V032_COLUMN_START_MIN,
580 MT9V032_COLUMN_START_MAX);
581 rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
582 MT9V032_ROW_START_MIN,
583 MT9V032_ROW_START_MAX);
584 rect.width = clamp_t(unsigned int, ALIGN(crop->rect.width, 2),
585 MT9V032_WINDOW_WIDTH_MIN,
586 MT9V032_WINDOW_WIDTH_MAX);
587 rect.height = clamp_t(unsigned int, ALIGN(crop->rect.height, 2),
588 MT9V032_WINDOW_HEIGHT_MIN,
589 MT9V032_WINDOW_HEIGHT_MAX);
590
591 rect.width = min_t(unsigned int,
592 rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
593 rect.height = min_t(unsigned int,
594 rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
595
596 __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
597
598 if (rect.width != __crop->width || rect.height != __crop->height) {
599 /* Reset the output image size if the crop rectangle size has
600 * been modified.
601 */
602 __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad,
603 crop->which);
604 __format->width = rect.width;
605 __format->height = rect.height;
606 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
607 mt9v032->hratio = 1;
608 mt9v032->vratio = 1;
609 mt9v032_configure_pixel_rate(mt9v032);
610 }
611 }
612
613 *__crop = rect;
614 crop->rect = rect;
615
616 return 0;
617 }
618
619 /* -----------------------------------------------------------------------------
620 * V4L2 subdev control operations
621 */
622
623 #define V4L2_CID_TEST_PATTERN_COLOR (V4L2_CID_USER_BASE | 0x1001)
624
625 static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
626 {
627 struct mt9v032 *mt9v032 =
628 container_of(ctrl->handler, struct mt9v032, ctrls);
629 struct regmap *map = mt9v032->regmap;
630 u32 freq;
631 u16 data;
632
633 switch (ctrl->id) {
634 case V4L2_CID_AUTOGAIN:
635 return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE,
636 ctrl->val);
637
638 case V4L2_CID_GAIN:
639 return regmap_write(map, MT9V032_ANALOG_GAIN, ctrl->val);
640
641 case V4L2_CID_EXPOSURE_AUTO:
642 return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE,
643 !ctrl->val);
644
645 case V4L2_CID_EXPOSURE:
646 return regmap_write(map, MT9V032_TOTAL_SHUTTER_WIDTH,
647 ctrl->val);
648
649 case V4L2_CID_HBLANK:
650 mt9v032->hblank = ctrl->val;
651 return mt9v032_update_hblank(mt9v032);
652
653 case V4L2_CID_VBLANK:
654 return regmap_write(map, MT9V032_VERTICAL_BLANKING,
655 ctrl->val);
656
657 case V4L2_CID_PIXEL_RATE:
658 case V4L2_CID_LINK_FREQ:
659 if (mt9v032->link_freq == NULL)
660 break;
661
662 freq = mt9v032->pdata->link_freqs[mt9v032->link_freq->val];
663 *mt9v032->pixel_rate->p_new.p_s64 = freq;
664 mt9v032->sysclk = freq;
665 break;
666
667 case V4L2_CID_TEST_PATTERN:
668 switch (mt9v032->test_pattern->val) {
669 case 0:
670 data = 0;
671 break;
672 case 1:
673 data = MT9V032_TEST_PATTERN_GRAY_VERTICAL
674 | MT9V032_TEST_PATTERN_ENABLE;
675 break;
676 case 2:
677 data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL
678 | MT9V032_TEST_PATTERN_ENABLE;
679 break;
680 case 3:
681 data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL
682 | MT9V032_TEST_PATTERN_ENABLE;
683 break;
684 default:
685 data = (mt9v032->test_pattern_color->val <<
686 MT9V032_TEST_PATTERN_DATA_SHIFT)
687 | MT9V032_TEST_PATTERN_USE_DATA
688 | MT9V032_TEST_PATTERN_ENABLE
689 | MT9V032_TEST_PATTERN_FLIP;
690 break;
691 }
692 return regmap_write(map, MT9V032_TEST_PATTERN, data);
693 }
694
695 return 0;
696 }
697
698 static struct v4l2_ctrl_ops mt9v032_ctrl_ops = {
699 .s_ctrl = mt9v032_s_ctrl,
700 };
701
702 static const char * const mt9v032_test_pattern_menu[] = {
703 "Disabled",
704 "Gray Vertical Shade",
705 "Gray Horizontal Shade",
706 "Gray Diagonal Shade",
707 "Plain",
708 };
709
710 static const struct v4l2_ctrl_config mt9v032_test_pattern_color = {
711 .ops = &mt9v032_ctrl_ops,
712 .id = V4L2_CID_TEST_PATTERN_COLOR,
713 .type = V4L2_CTRL_TYPE_INTEGER,
714 .name = "Test Pattern Color",
715 .min = 0,
716 .max = 1023,
717 .step = 1,
718 .def = 0,
719 .flags = 0,
720 };
721
722 /* -----------------------------------------------------------------------------
723 * V4L2 subdev core operations
724 */
725
726 static int mt9v032_set_power(struct v4l2_subdev *subdev, int on)
727 {
728 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
729 int ret = 0;
730
731 mutex_lock(&mt9v032->power_lock);
732
733 /* If the power count is modified from 0 to != 0 or from != 0 to 0,
734 * update the power state.
735 */
736 if (mt9v032->power_count == !on) {
737 ret = __mt9v032_set_power(mt9v032, !!on);
738 if (ret < 0)
739 goto done;
740 }
741
742 /* Update the power count. */
743 mt9v032->power_count += on ? 1 : -1;
744 WARN_ON(mt9v032->power_count < 0);
745
746 done:
747 mutex_unlock(&mt9v032->power_lock);
748 return ret;
749 }
750
751 /* -----------------------------------------------------------------------------
752 * V4L2 subdev internal operations
753 */
754
755 static int mt9v032_registered(struct v4l2_subdev *subdev)
756 {
757 struct i2c_client *client = v4l2_get_subdevdata(subdev);
758 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
759 unsigned int i;
760 u32 version;
761 int ret;
762
763 dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n",
764 client->addr);
765
766 ret = mt9v032_power_on(mt9v032);
767 if (ret < 0) {
768 dev_err(&client->dev, "MT9V032 power up failed\n");
769 return ret;
770 }
771
772 /* Read and check the sensor version */
773 ret = regmap_read(mt9v032->regmap, MT9V032_CHIP_VERSION, &version);
774 if (ret < 0) {
775 dev_err(&client->dev, "Failed reading chip version\n");
776 return ret;
777 }
778
779 for (i = 0; i < ARRAY_SIZE(mt9v032_versions); ++i) {
780 if (mt9v032_versions[i].version == version) {
781 mt9v032->version = &mt9v032_versions[i];
782 break;
783 }
784 }
785
786 if (mt9v032->version == NULL) {
787 dev_err(&client->dev, "Unsupported chip version 0x%04x\n",
788 version);
789 return -ENODEV;
790 }
791
792 mt9v032_power_off(mt9v032);
793
794 dev_info(&client->dev, "%s detected at address 0x%02x\n",
795 mt9v032->version->name, client->addr);
796
797 mt9v032_configure_pixel_rate(mt9v032);
798
799 return ret;
800 }
801
802 static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
803 {
804 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
805 struct v4l2_mbus_framefmt *format;
806 struct v4l2_rect *crop;
807
808 crop = v4l2_subdev_get_try_crop(fh, 0);
809 crop->left = MT9V032_COLUMN_START_DEF;
810 crop->top = MT9V032_ROW_START_DEF;
811 crop->width = MT9V032_WINDOW_WIDTH_DEF;
812 crop->height = MT9V032_WINDOW_HEIGHT_DEF;
813
814 format = v4l2_subdev_get_try_format(fh, 0);
815
816 if (mt9v032->model->color)
817 format->code = MEDIA_BUS_FMT_SGRBG10_1X10;
818 else
819 format->code = MEDIA_BUS_FMT_Y10_1X10;
820
821 format->width = MT9V032_WINDOW_WIDTH_DEF;
822 format->height = MT9V032_WINDOW_HEIGHT_DEF;
823 format->field = V4L2_FIELD_NONE;
824 format->colorspace = V4L2_COLORSPACE_SRGB;
825
826 return mt9v032_set_power(subdev, 1);
827 }
828
829 static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
830 {
831 return mt9v032_set_power(subdev, 0);
832 }
833
834 static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
835 .s_power = mt9v032_set_power,
836 };
837
838 static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
839 .s_stream = mt9v032_s_stream,
840 };
841
842 static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
843 .enum_mbus_code = mt9v032_enum_mbus_code,
844 .enum_frame_size = mt9v032_enum_frame_size,
845 .get_fmt = mt9v032_get_format,
846 .set_fmt = mt9v032_set_format,
847 .get_crop = mt9v032_get_crop,
848 .set_crop = mt9v032_set_crop,
849 };
850
851 static struct v4l2_subdev_ops mt9v032_subdev_ops = {
852 .core = &mt9v032_subdev_core_ops,
853 .video = &mt9v032_subdev_video_ops,
854 .pad = &mt9v032_subdev_pad_ops,
855 };
856
857 static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
858 .registered = mt9v032_registered,
859 .open = mt9v032_open,
860 .close = mt9v032_close,
861 };
862
863 static const struct regmap_config mt9v032_regmap_config = {
864 .reg_bits = 8,
865 .val_bits = 16,
866 .max_register = 0xff,
867 .cache_type = REGCACHE_RBTREE,
868 };
869
870 /* -----------------------------------------------------------------------------
871 * Driver initialization and probing
872 */
873
874 static int mt9v032_probe(struct i2c_client *client,
875 const struct i2c_device_id *did)
876 {
877 struct mt9v032_platform_data *pdata = client->dev.platform_data;
878 struct mt9v032 *mt9v032;
879 unsigned int i;
880 int ret;
881
882 if (!i2c_check_functionality(client->adapter,
883 I2C_FUNC_SMBUS_WORD_DATA)) {
884 dev_warn(&client->adapter->dev,
885 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
886 return -EIO;
887 }
888
889 mt9v032 = devm_kzalloc(&client->dev, sizeof(*mt9v032), GFP_KERNEL);
890 if (!mt9v032)
891 return -ENOMEM;
892
893 mt9v032->regmap = devm_regmap_init_i2c(client, &mt9v032_regmap_config);
894 if (IS_ERR(mt9v032->regmap))
895 return PTR_ERR(mt9v032->regmap);
896
897 mt9v032->clk = devm_clk_get(&client->dev, NULL);
898 if (IS_ERR(mt9v032->clk))
899 return PTR_ERR(mt9v032->clk);
900
901 mutex_init(&mt9v032->power_lock);
902 mt9v032->pdata = pdata;
903 mt9v032->model = (const void *)did->driver_data;
904
905 v4l2_ctrl_handler_init(&mt9v032->ctrls, 10);
906
907 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
908 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
909 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
910 V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN,
911 MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF);
912 v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops,
913 V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
914 V4L2_EXPOSURE_AUTO);
915 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
916 V4L2_CID_EXPOSURE, mt9v032->model->data->min_shutter,
917 mt9v032->model->data->max_shutter, 1,
918 MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
919 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
920 V4L2_CID_HBLANK, mt9v032->model->data->min_hblank,
921 MT9V032_HORIZONTAL_BLANKING_MAX, 1,
922 MT9V032_HORIZONTAL_BLANKING_DEF);
923 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
924 V4L2_CID_VBLANK, mt9v032->model->data->min_vblank,
925 mt9v032->model->data->max_vblank, 1,
926 MT9V032_VERTICAL_BLANKING_DEF);
927 mt9v032->test_pattern = v4l2_ctrl_new_std_menu_items(&mt9v032->ctrls,
928 &mt9v032_ctrl_ops, V4L2_CID_TEST_PATTERN,
929 ARRAY_SIZE(mt9v032_test_pattern_menu) - 1, 0, 0,
930 mt9v032_test_pattern_menu);
931 mt9v032->test_pattern_color = v4l2_ctrl_new_custom(&mt9v032->ctrls,
932 &mt9v032_test_pattern_color, NULL);
933
934 v4l2_ctrl_cluster(2, &mt9v032->test_pattern);
935
936 mt9v032->pixel_rate =
937 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
938 V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
939
940 if (pdata && pdata->link_freqs) {
941 unsigned int def = 0;
942
943 for (i = 0; pdata->link_freqs[i]; ++i) {
944 if (pdata->link_freqs[i] == pdata->link_def_freq)
945 def = i;
946 }
947
948 mt9v032->link_freq =
949 v4l2_ctrl_new_int_menu(&mt9v032->ctrls,
950 &mt9v032_ctrl_ops,
951 V4L2_CID_LINK_FREQ, i - 1, def,
952 pdata->link_freqs);
953 v4l2_ctrl_cluster(2, &mt9v032->link_freq);
954 }
955
956
957 mt9v032->subdev.ctrl_handler = &mt9v032->ctrls;
958
959 if (mt9v032->ctrls.error)
960 printk(KERN_INFO "%s: control initialization error %d\n",
961 __func__, mt9v032->ctrls.error);
962
963 mt9v032->crop.left = MT9V032_COLUMN_START_DEF;
964 mt9v032->crop.top = MT9V032_ROW_START_DEF;
965 mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF;
966 mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF;
967
968 if (mt9v032->model->color)
969 mt9v032->format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
970 else
971 mt9v032->format.code = MEDIA_BUS_FMT_Y10_1X10;
972
973 mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF;
974 mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF;
975 mt9v032->format.field = V4L2_FIELD_NONE;
976 mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
977
978 mt9v032->hratio = 1;
979 mt9v032->vratio = 1;
980
981 mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
982 mt9v032->hblank = MT9V032_HORIZONTAL_BLANKING_DEF;
983 mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF;
984
985 v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
986 mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;
987 mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
988
989 mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE;
990 ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0);
991 if (ret < 0)
992 goto err;
993
994 mt9v032->subdev.dev = &client->dev;
995 ret = v4l2_async_register_subdev(&mt9v032->subdev);
996 if (ret < 0)
997 goto err;
998
999 return 0;
1000
1001 err:
1002 media_entity_cleanup(&mt9v032->subdev.entity);
1003 v4l2_ctrl_handler_free(&mt9v032->ctrls);
1004 return ret;
1005 }
1006
1007 static int mt9v032_remove(struct i2c_client *client)
1008 {
1009 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
1010 struct mt9v032 *mt9v032 = to_mt9v032(subdev);
1011
1012 v4l2_async_unregister_subdev(subdev);
1013 v4l2_ctrl_handler_free(&mt9v032->ctrls);
1014 v4l2_device_unregister_subdev(subdev);
1015 media_entity_cleanup(&subdev->entity);
1016
1017 return 0;
1018 }
1019
1020 static const struct i2c_device_id mt9v032_id[] = {
1021 { "mt9v022", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V022_COLOR] },
1022 { "mt9v022m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V022_MONO] },
1023 { "mt9v024", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V024_COLOR] },
1024 { "mt9v024m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V024_MONO] },
1025 { "mt9v032", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V032_COLOR] },
1026 { "mt9v032m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V032_MONO] },
1027 { "mt9v034", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_COLOR] },
1028 { "mt9v034m", (kernel_ulong_t)&mt9v032_models[MT9V032_MODEL_V034_MONO] },
1029 { }
1030 };
1031 MODULE_DEVICE_TABLE(i2c, mt9v032_id);
1032
1033 static struct i2c_driver mt9v032_driver = {
1034 .driver = {
1035 .name = "mt9v032",
1036 },
1037 .probe = mt9v032_probe,
1038 .remove = mt9v032_remove,
1039 .id_table = mt9v032_id,
1040 };
1041
1042 module_i2c_driver(mt9v032_driver);
1043
1044 MODULE_DESCRIPTION("Aptina MT9V032 Camera driver");
1045 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
1046 MODULE_LICENSE("GPL");
Linux with added FPC-III support