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12#include <linux/clk.h>
13#include <linux/delay.h>
14#include <linux/device.h>
15#include <linux/gpio/consumer.h>
16#include <linux/i2c.h>
17#include <linux/log2.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/of_graph.h>
21#include <linux/pm.h>
22#include <linux/regulator/consumer.h>
23#include <linux/slab.h>
24#include <linux/videodev2.h>
25
26#include <media/i2c/mt9p031.h>
27#include <media/v4l2-async.h>
28#include <media/v4l2-ctrls.h>
29#include <media/v4l2-device.h>
30#include <media/v4l2-subdev.h>
31
32#include "aptina-pll.h"
33
34#define MT9P031_PIXEL_ARRAY_WIDTH 2752
35#define MT9P031_PIXEL_ARRAY_HEIGHT 2004
36
37#define MT9P031_CHIP_VERSION 0x00
38#define MT9P031_CHIP_VERSION_VALUE 0x1801
39#define MT9P031_ROW_START 0x01
40#define MT9P031_ROW_START_MIN 0
41#define MT9P031_ROW_START_MAX 2004
42#define MT9P031_ROW_START_DEF 54
43#define MT9P031_COLUMN_START 0x02
44#define MT9P031_COLUMN_START_MIN 0
45#define MT9P031_COLUMN_START_MAX 2750
46#define MT9P031_COLUMN_START_DEF 16
47#define MT9P031_WINDOW_HEIGHT 0x03
48#define MT9P031_WINDOW_HEIGHT_MIN 2
49#define MT9P031_WINDOW_HEIGHT_MAX 2006
50#define MT9P031_WINDOW_HEIGHT_DEF 1944
51#define MT9P031_WINDOW_WIDTH 0x04
52#define MT9P031_WINDOW_WIDTH_MIN 2
53#define MT9P031_WINDOW_WIDTH_MAX 2752
54#define MT9P031_WINDOW_WIDTH_DEF 2592
55#define MT9P031_HORIZONTAL_BLANK 0x05
56#define MT9P031_HORIZONTAL_BLANK_MIN 0
57#define MT9P031_HORIZONTAL_BLANK_MAX 4095
58#define MT9P031_VERTICAL_BLANK 0x06
59#define MT9P031_VERTICAL_BLANK_MIN 1
60#define MT9P031_VERTICAL_BLANK_MAX 4096
61#define MT9P031_VERTICAL_BLANK_DEF 26
62#define MT9P031_OUTPUT_CONTROL 0x07
63#define MT9P031_OUTPUT_CONTROL_CEN 2
64#define MT9P031_OUTPUT_CONTROL_SYN 1
65#define MT9P031_OUTPUT_CONTROL_DEF 0x1f82
66#define MT9P031_SHUTTER_WIDTH_UPPER 0x08
67#define MT9P031_SHUTTER_WIDTH_LOWER 0x09
68#define MT9P031_SHUTTER_WIDTH_MIN 1
69#define MT9P031_SHUTTER_WIDTH_MAX 1048575
70#define MT9P031_SHUTTER_WIDTH_DEF 1943
71#define MT9P031_PLL_CONTROL 0x10
72#define MT9P031_PLL_CONTROL_PWROFF 0x0050
73#define MT9P031_PLL_CONTROL_PWRON 0x0051
74#define MT9P031_PLL_CONTROL_USEPLL 0x0052
75#define MT9P031_PLL_CONFIG_1 0x11
76#define MT9P031_PLL_CONFIG_2 0x12
77#define MT9P031_PIXEL_CLOCK_CONTROL 0x0a
78#define MT9P031_PIXEL_CLOCK_INVERT (1 << 15)
79#define MT9P031_PIXEL_CLOCK_SHIFT(n) ((n) << 8)
80#define MT9P031_PIXEL_CLOCK_DIVIDE(n) ((n) << 0)
81#define MT9P031_FRAME_RESTART 0x0b
82#define MT9P031_SHUTTER_DELAY 0x0c
83#define MT9P031_RST 0x0d
84#define MT9P031_RST_ENABLE 1
85#define MT9P031_RST_DISABLE 0
86#define MT9P031_READ_MODE_1 0x1e
87#define MT9P031_READ_MODE_2 0x20
88#define MT9P031_READ_MODE_2_ROW_MIR (1 << 15)
89#define MT9P031_READ_MODE_2_COL_MIR (1 << 14)
90#define MT9P031_READ_MODE_2_ROW_BLC (1 << 6)
91#define MT9P031_ROW_ADDRESS_MODE 0x22
92#define MT9P031_COLUMN_ADDRESS_MODE 0x23
93#define MT9P031_GLOBAL_GAIN 0x35
94#define MT9P031_GLOBAL_GAIN_MIN 8
95#define MT9P031_GLOBAL_GAIN_MAX 1024
96#define MT9P031_GLOBAL_GAIN_DEF 8
97#define MT9P031_GLOBAL_GAIN_MULT (1 << 6)
98#define MT9P031_ROW_BLACK_TARGET 0x49
99#define MT9P031_ROW_BLACK_DEF_OFFSET 0x4b
100#define MT9P031_GREEN1_OFFSET 0x60
101#define MT9P031_GREEN2_OFFSET 0x61
102#define MT9P031_BLACK_LEVEL_CALIBRATION 0x62
103#define MT9P031_BLC_MANUAL_BLC (1 << 0)
104#define MT9P031_RED_OFFSET 0x63
105#define MT9P031_BLUE_OFFSET 0x64
106#define MT9P031_TEST_PATTERN 0xa0
107#define MT9P031_TEST_PATTERN_SHIFT 3
108#define MT9P031_TEST_PATTERN_ENABLE (1 << 0)
109#define MT9P031_TEST_PATTERN_DISABLE (0 << 0)
110#define MT9P031_TEST_PATTERN_GREEN 0xa1
111#define MT9P031_TEST_PATTERN_RED 0xa2
112#define MT9P031_TEST_PATTERN_BLUE 0xa3
113
114enum mt9p031_model {
115 MT9P031_MODEL_COLOR,
116 MT9P031_MODEL_MONOCHROME,
117};
118
119struct mt9p031 {
120 struct v4l2_subdev subdev;
121 struct media_pad pad;
122 struct v4l2_rect crop;
123 struct v4l2_mbus_framefmt format;
124 struct mt9p031_platform_data *pdata;
125 struct mutex power_lock;
126 int power_count;
127
128 struct clk *clk;
129 struct regulator_bulk_data regulators[3];
130
131 enum mt9p031_model model;
132 struct aptina_pll pll;
133 unsigned int clk_div;
134 bool use_pll;
135 struct gpio_desc *reset;
136
137 struct v4l2_ctrl_handler ctrls;
138 struct v4l2_ctrl *blc_auto;
139 struct v4l2_ctrl *blc_offset;
140
141
142 u16 output_control;
143 u16 mode2;
144};
145
146static struct mt9p031 *to_mt9p031(struct v4l2_subdev *sd)
147{
148 return container_of(sd, struct mt9p031, subdev);
149}
150
151static int mt9p031_read(struct i2c_client *client, u8 reg)
152{
153 return i2c_smbus_read_word_swapped(client, reg);
154}
155
156static int mt9p031_write(struct i2c_client *client, u8 reg, u16 data)
157{
158 return i2c_smbus_write_word_swapped(client, reg, data);
159}
160
161static int mt9p031_set_output_control(struct mt9p031 *mt9p031, u16 clear,
162 u16 set)
163{
164 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
165 u16 value = (mt9p031->output_control & ~clear) | set;
166 int ret;
167
168 ret = mt9p031_write(client, MT9P031_OUTPUT_CONTROL, value);
169 if (ret < 0)
170 return ret;
171
172 mt9p031->output_control = value;
173 return 0;
174}
175
176static int mt9p031_set_mode2(struct mt9p031 *mt9p031, u16 clear, u16 set)
177{
178 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
179 u16 value = (mt9p031->mode2 & ~clear) | set;
180 int ret;
181
182 ret = mt9p031_write(client, MT9P031_READ_MODE_2, value);
183 if (ret < 0)
184 return ret;
185
186 mt9p031->mode2 = value;
187 return 0;
188}
189
190static int mt9p031_reset(struct mt9p031 *mt9p031)
191{
192 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
193 int ret;
194
195
196 ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_ENABLE);
197 if (ret < 0)
198 return ret;
199 ret = mt9p031_write(client, MT9P031_RST, MT9P031_RST_DISABLE);
200 if (ret < 0)
201 return ret;
202
203 ret = mt9p031_write(client, MT9P031_PIXEL_CLOCK_CONTROL,
204 MT9P031_PIXEL_CLOCK_DIVIDE(mt9p031->clk_div));
205 if (ret < 0)
206 return ret;
207
208 return mt9p031_set_output_control(mt9p031, MT9P031_OUTPUT_CONTROL_CEN,
209 0);
210}
211
212static int mt9p031_clk_setup(struct mt9p031 *mt9p031)
213{
214 static const struct aptina_pll_limits limits = {
215 .ext_clock_min = 6000000,
216 .ext_clock_max = 27000000,
217 .int_clock_min = 2000000,
218 .int_clock_max = 13500000,
219 .out_clock_min = 180000000,
220 .out_clock_max = 360000000,
221 .pix_clock_max = 96000000,
222 .n_min = 1,
223 .n_max = 64,
224 .m_min = 16,
225 .m_max = 255,
226 .p1_min = 1,
227 .p1_max = 128,
228 };
229
230 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
231 struct mt9p031_platform_data *pdata = mt9p031->pdata;
232 int ret;
233
234 mt9p031->clk = devm_clk_get(&client->dev, NULL);
235 if (IS_ERR(mt9p031->clk))
236 return PTR_ERR(mt9p031->clk);
237
238 ret = clk_set_rate(mt9p031->clk, pdata->ext_freq);
239 if (ret < 0)
240 return ret;
241
242
243
244
245 if (pdata->ext_freq > limits.ext_clock_max) {
246 unsigned int div;
247
248 div = DIV_ROUND_UP(pdata->ext_freq, pdata->target_freq);
249 div = roundup_pow_of_two(div) / 2;
250
251 mt9p031->clk_div = min_t(unsigned int, div, 64);
252 mt9p031->use_pll = false;
253
254 return 0;
255 }
256
257 mt9p031->pll.ext_clock = pdata->ext_freq;
258 mt9p031->pll.pix_clock = pdata->target_freq;
259 mt9p031->use_pll = true;
260
261 return aptina_pll_calculate(&client->dev, &limits, &mt9p031->pll);
262}
263
264static int mt9p031_pll_enable(struct mt9p031 *mt9p031)
265{
266 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
267 int ret;
268
269 if (!mt9p031->use_pll)
270 return 0;
271
272 ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
273 MT9P031_PLL_CONTROL_PWRON);
274 if (ret < 0)
275 return ret;
276
277 ret = mt9p031_write(client, MT9P031_PLL_CONFIG_1,
278 (mt9p031->pll.m << 8) | (mt9p031->pll.n - 1));
279 if (ret < 0)
280 return ret;
281
282 ret = mt9p031_write(client, MT9P031_PLL_CONFIG_2, mt9p031->pll.p1 - 1);
283 if (ret < 0)
284 return ret;
285
286 usleep_range(1000, 2000);
287 ret = mt9p031_write(client, MT9P031_PLL_CONTROL,
288 MT9P031_PLL_CONTROL_PWRON |
289 MT9P031_PLL_CONTROL_USEPLL);
290 return ret;
291}
292
293static inline int mt9p031_pll_disable(struct mt9p031 *mt9p031)
294{
295 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
296
297 if (!mt9p031->use_pll)
298 return 0;
299
300 return mt9p031_write(client, MT9P031_PLL_CONTROL,
301 MT9P031_PLL_CONTROL_PWROFF);
302}
303
304static int mt9p031_power_on(struct mt9p031 *mt9p031)
305{
306 int ret;
307
308
309 if (mt9p031->reset) {
310 gpiod_set_value(mt9p031->reset, 1);
311 usleep_range(1000, 2000);
312 }
313
314
315 ret = regulator_bulk_enable(ARRAY_SIZE(mt9p031->regulators),
316 mt9p031->regulators);
317 if (ret < 0)
318 return ret;
319
320
321 if (mt9p031->clk) {
322 ret = clk_prepare_enable(mt9p031->clk);
323 if (ret) {
324 regulator_bulk_disable(ARRAY_SIZE(mt9p031->regulators),
325 mt9p031->regulators);
326 return ret;
327 }
328 }
329
330
331 if (mt9p031->reset) {
332 gpiod_set_value(mt9p031->reset, 0);
333 usleep_range(1000, 2000);
334 }
335
336 return 0;
337}
338
339static void mt9p031_power_off(struct mt9p031 *mt9p031)
340{
341 if (mt9p031->reset) {
342 gpiod_set_value(mt9p031->reset, 1);
343 usleep_range(1000, 2000);
344 }
345
346 regulator_bulk_disable(ARRAY_SIZE(mt9p031->regulators),
347 mt9p031->regulators);
348
349 clk_disable_unprepare(mt9p031->clk);
350}
351
352static int __mt9p031_set_power(struct mt9p031 *mt9p031, bool on)
353{
354 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
355 int ret;
356
357 if (!on) {
358 mt9p031_power_off(mt9p031);
359 return 0;
360 }
361
362 ret = mt9p031_power_on(mt9p031);
363 if (ret < 0)
364 return ret;
365
366 ret = mt9p031_reset(mt9p031);
367 if (ret < 0) {
368 dev_err(&client->dev, "Failed to reset the camera\n");
369 return ret;
370 }
371
372 return v4l2_ctrl_handler_setup(&mt9p031->ctrls);
373}
374
375
376
377
378
379static int mt9p031_set_params(struct mt9p031 *mt9p031)
380{
381 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
382 struct v4l2_mbus_framefmt *format = &mt9p031->format;
383 const struct v4l2_rect *crop = &mt9p031->crop;
384 unsigned int hblank;
385 unsigned int vblank;
386 unsigned int xskip;
387 unsigned int yskip;
388 unsigned int xbin;
389 unsigned int ybin;
390 int ret;
391
392
393
394
395
396
397
398 ret = mt9p031_write(client, MT9P031_COLUMN_START, crop->left);
399 if (ret < 0)
400 return ret;
401 ret = mt9p031_write(client, MT9P031_ROW_START, crop->top);
402 if (ret < 0)
403 return ret;
404 ret = mt9p031_write(client, MT9P031_WINDOW_WIDTH, crop->width - 1);
405 if (ret < 0)
406 return ret;
407 ret = mt9p031_write(client, MT9P031_WINDOW_HEIGHT, crop->height - 1);
408 if (ret < 0)
409 return ret;
410
411
412
413
414 xskip = DIV_ROUND_CLOSEST(crop->width, format->width);
415 yskip = DIV_ROUND_CLOSEST(crop->height, format->height);
416 xbin = 1 << (ffs(xskip) - 1);
417 ybin = 1 << (ffs(yskip) - 1);
418
419 ret = mt9p031_write(client, MT9P031_COLUMN_ADDRESS_MODE,
420 ((xbin - 1) << 4) | (xskip - 1));
421 if (ret < 0)
422 return ret;
423 ret = mt9p031_write(client, MT9P031_ROW_ADDRESS_MODE,
424 ((ybin - 1) << 4) | (yskip - 1));
425 if (ret < 0)
426 return ret;
427
428
429
430
431 hblank = 346 * ybin + 64 + (80 >> min_t(unsigned int, xbin, 3));
432 vblank = MT9P031_VERTICAL_BLANK_DEF;
433
434 ret = mt9p031_write(client, MT9P031_HORIZONTAL_BLANK, hblank - 1);
435 if (ret < 0)
436 return ret;
437 ret = mt9p031_write(client, MT9P031_VERTICAL_BLANK, vblank - 1);
438 if (ret < 0)
439 return ret;
440
441 return ret;
442}
443
444static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable)
445{
446 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
447 int ret;
448
449 if (!enable) {
450
451 ret = mt9p031_set_output_control(mt9p031,
452 MT9P031_OUTPUT_CONTROL_CEN, 0);
453 if (ret < 0)
454 return ret;
455
456 return mt9p031_pll_disable(mt9p031);
457 }
458
459 ret = mt9p031_set_params(mt9p031);
460 if (ret < 0)
461 return ret;
462
463
464 ret = mt9p031_set_output_control(mt9p031, 0,
465 MT9P031_OUTPUT_CONTROL_CEN);
466 if (ret < 0)
467 return ret;
468
469 return mt9p031_pll_enable(mt9p031);
470}
471
472static int mt9p031_enum_mbus_code(struct v4l2_subdev *subdev,
473 struct v4l2_subdev_state *sd_state,
474 struct v4l2_subdev_mbus_code_enum *code)
475{
476 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
477
478 if (code->pad || code->index)
479 return -EINVAL;
480
481 code->code = mt9p031->format.code;
482 return 0;
483}
484
485static int mt9p031_enum_frame_size(struct v4l2_subdev *subdev,
486 struct v4l2_subdev_state *sd_state,
487 struct v4l2_subdev_frame_size_enum *fse)
488{
489 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
490
491 if (fse->index >= 8 || fse->code != mt9p031->format.code)
492 return -EINVAL;
493
494 fse->min_width = MT9P031_WINDOW_WIDTH_DEF
495 / min_t(unsigned int, 7, fse->index + 1);
496 fse->max_width = fse->min_width;
497 fse->min_height = MT9P031_WINDOW_HEIGHT_DEF / (fse->index + 1);
498 fse->max_height = fse->min_height;
499
500 return 0;
501}
502
503static struct v4l2_mbus_framefmt *
504__mt9p031_get_pad_format(struct mt9p031 *mt9p031,
505 struct v4l2_subdev_state *sd_state,
506 unsigned int pad, u32 which)
507{
508 switch (which) {
509 case V4L2_SUBDEV_FORMAT_TRY:
510 return v4l2_subdev_get_try_format(&mt9p031->subdev, sd_state,
511 pad);
512 case V4L2_SUBDEV_FORMAT_ACTIVE:
513 return &mt9p031->format;
514 default:
515 return NULL;
516 }
517}
518
519static struct v4l2_rect *
520__mt9p031_get_pad_crop(struct mt9p031 *mt9p031,
521 struct v4l2_subdev_state *sd_state,
522 unsigned int pad, u32 which)
523{
524 switch (which) {
525 case V4L2_SUBDEV_FORMAT_TRY:
526 return v4l2_subdev_get_try_crop(&mt9p031->subdev, sd_state,
527 pad);
528 case V4L2_SUBDEV_FORMAT_ACTIVE:
529 return &mt9p031->crop;
530 default:
531 return NULL;
532 }
533}
534
535static int mt9p031_get_format(struct v4l2_subdev *subdev,
536 struct v4l2_subdev_state *sd_state,
537 struct v4l2_subdev_format *fmt)
538{
539 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
540
541 fmt->format = *__mt9p031_get_pad_format(mt9p031, sd_state, fmt->pad,
542 fmt->which);
543 return 0;
544}
545
546static int mt9p031_set_format(struct v4l2_subdev *subdev,
547 struct v4l2_subdev_state *sd_state,
548 struct v4l2_subdev_format *format)
549{
550 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
551 struct v4l2_mbus_framefmt *__format;
552 struct v4l2_rect *__crop;
553 unsigned int width;
554 unsigned int height;
555 unsigned int hratio;
556 unsigned int vratio;
557
558 __crop = __mt9p031_get_pad_crop(mt9p031, sd_state, format->pad,
559 format->which);
560
561
562 width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
563 max_t(unsigned int, __crop->width / 7,
564 MT9P031_WINDOW_WIDTH_MIN),
565 __crop->width);
566 height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
567 max_t(unsigned int, __crop->height / 8,
568 MT9P031_WINDOW_HEIGHT_MIN),
569 __crop->height);
570
571 hratio = DIV_ROUND_CLOSEST(__crop->width, width);
572 vratio = DIV_ROUND_CLOSEST(__crop->height, height);
573
574 __format = __mt9p031_get_pad_format(mt9p031, sd_state, format->pad,
575 format->which);
576 __format->width = __crop->width / hratio;
577 __format->height = __crop->height / vratio;
578
579 format->format = *__format;
580
581 return 0;
582}
583
584static int mt9p031_get_selection(struct v4l2_subdev *subdev,
585 struct v4l2_subdev_state *sd_state,
586 struct v4l2_subdev_selection *sel)
587{
588 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
589
590 if (sel->target != V4L2_SEL_TGT_CROP)
591 return -EINVAL;
592
593 sel->r = *__mt9p031_get_pad_crop(mt9p031, sd_state, sel->pad,
594 sel->which);
595 return 0;
596}
597
598static int mt9p031_set_selection(struct v4l2_subdev *subdev,
599 struct v4l2_subdev_state *sd_state,
600 struct v4l2_subdev_selection *sel)
601{
602 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
603 struct v4l2_mbus_framefmt *__format;
604 struct v4l2_rect *__crop;
605 struct v4l2_rect rect;
606
607 if (sel->target != V4L2_SEL_TGT_CROP)
608 return -EINVAL;
609
610
611
612
613 rect.left = clamp(ALIGN(sel->r.left, 2), MT9P031_COLUMN_START_MIN,
614 MT9P031_COLUMN_START_MAX);
615 rect.top = clamp(ALIGN(sel->r.top, 2), MT9P031_ROW_START_MIN,
616 MT9P031_ROW_START_MAX);
617 rect.width = clamp_t(unsigned int, ALIGN(sel->r.width, 2),
618 MT9P031_WINDOW_WIDTH_MIN,
619 MT9P031_WINDOW_WIDTH_MAX);
620 rect.height = clamp_t(unsigned int, ALIGN(sel->r.height, 2),
621 MT9P031_WINDOW_HEIGHT_MIN,
622 MT9P031_WINDOW_HEIGHT_MAX);
623
624 rect.width = min_t(unsigned int, rect.width,
625 MT9P031_PIXEL_ARRAY_WIDTH - rect.left);
626 rect.height = min_t(unsigned int, rect.height,
627 MT9P031_PIXEL_ARRAY_HEIGHT - rect.top);
628
629 __crop = __mt9p031_get_pad_crop(mt9p031, sd_state, sel->pad,
630 sel->which);
631
632 if (rect.width != __crop->width || rect.height != __crop->height) {
633
634
635
636 __format = __mt9p031_get_pad_format(mt9p031, sd_state,
637 sel->pad,
638 sel->which);
639 __format->width = rect.width;
640 __format->height = rect.height;
641 }
642
643 *__crop = rect;
644 sel->r = rect;
645
646 return 0;
647}
648
649
650
651
652
653#define V4L2_CID_BLC_AUTO (V4L2_CID_USER_BASE | 0x1002)
654#define V4L2_CID_BLC_TARGET_LEVEL (V4L2_CID_USER_BASE | 0x1003)
655#define V4L2_CID_BLC_ANALOG_OFFSET (V4L2_CID_USER_BASE | 0x1004)
656#define V4L2_CID_BLC_DIGITAL_OFFSET (V4L2_CID_USER_BASE | 0x1005)
657
658static int mt9p031_restore_blc(struct mt9p031 *mt9p031)
659{
660 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
661 int ret;
662
663 if (mt9p031->blc_auto->cur.val != 0) {
664 ret = mt9p031_set_mode2(mt9p031, 0,
665 MT9P031_READ_MODE_2_ROW_BLC);
666 if (ret < 0)
667 return ret;
668 }
669
670 if (mt9p031->blc_offset->cur.val != 0) {
671 ret = mt9p031_write(client, MT9P031_ROW_BLACK_TARGET,
672 mt9p031->blc_offset->cur.val);
673 if (ret < 0)
674 return ret;
675 }
676
677 return 0;
678}
679
680static int mt9p031_s_ctrl(struct v4l2_ctrl *ctrl)
681{
682 struct mt9p031 *mt9p031 =
683 container_of(ctrl->handler, struct mt9p031, ctrls);
684 struct i2c_client *client = v4l2_get_subdevdata(&mt9p031->subdev);
685 u16 data;
686 int ret;
687
688 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
689 return 0;
690
691 switch (ctrl->id) {
692 case V4L2_CID_EXPOSURE:
693 ret = mt9p031_write(client, MT9P031_SHUTTER_WIDTH_UPPER,
694 (ctrl->val >> 16) & 0xffff);
695 if (ret < 0)
696 return ret;
697
698 return mt9p031_write(client, MT9P031_SHUTTER_WIDTH_LOWER,
699 ctrl->val & 0xffff);
700
701 case V4L2_CID_GAIN:
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716 if (ctrl->val <= 32) {
717 data = ctrl->val;
718 } else if (ctrl->val <= 64) {
719 ctrl->val &= ~1;
720 data = (1 << 6) | (ctrl->val >> 1);
721 } else {
722 ctrl->val &= ~7;
723 data = ((ctrl->val - 64) << 5) | (1 << 6) | 32;
724 }
725
726 return mt9p031_write(client, MT9P031_GLOBAL_GAIN, data);
727
728 case V4L2_CID_HFLIP:
729 if (ctrl->val)
730 return mt9p031_set_mode2(mt9p031,
731 0, MT9P031_READ_MODE_2_COL_MIR);
732 else
733 return mt9p031_set_mode2(mt9p031,
734 MT9P031_READ_MODE_2_COL_MIR, 0);
735
736 case V4L2_CID_VFLIP:
737 if (ctrl->val)
738 return mt9p031_set_mode2(mt9p031,
739 0, MT9P031_READ_MODE_2_ROW_MIR);
740 else
741 return mt9p031_set_mode2(mt9p031,
742 MT9P031_READ_MODE_2_ROW_MIR, 0);
743
744 case V4L2_CID_TEST_PATTERN:
745
746
747
748
749
750 v4l2_ctrl_activate(mt9p031->blc_auto, ctrl->val == 0);
751 v4l2_ctrl_activate(mt9p031->blc_offset, ctrl->val == 0);
752
753 if (!ctrl->val) {
754
755 ret = mt9p031_restore_blc(mt9p031);
756 if (ret < 0)
757 return ret;
758
759 return mt9p031_write(client, MT9P031_TEST_PATTERN,
760 MT9P031_TEST_PATTERN_DISABLE);
761 }
762
763 ret = mt9p031_write(client, MT9P031_TEST_PATTERN_GREEN, 0x05a0);
764 if (ret < 0)
765 return ret;
766 ret = mt9p031_write(client, MT9P031_TEST_PATTERN_RED, 0x0a50);
767 if (ret < 0)
768 return ret;
769 ret = mt9p031_write(client, MT9P031_TEST_PATTERN_BLUE, 0x0aa0);
770 if (ret < 0)
771 return ret;
772
773
774 ret = mt9p031_set_mode2(mt9p031, MT9P031_READ_MODE_2_ROW_BLC,
775 0);
776 if (ret < 0)
777 return ret;
778
779 ret = mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET, 0);
780 if (ret < 0)
781 return ret;
782
783 return mt9p031_write(client, MT9P031_TEST_PATTERN,
784 ((ctrl->val - 1) << MT9P031_TEST_PATTERN_SHIFT)
785 | MT9P031_TEST_PATTERN_ENABLE);
786
787 case V4L2_CID_BLC_AUTO:
788 ret = mt9p031_set_mode2(mt9p031,
789 ctrl->val ? 0 : MT9P031_READ_MODE_2_ROW_BLC,
790 ctrl->val ? MT9P031_READ_MODE_2_ROW_BLC : 0);
791 if (ret < 0)
792 return ret;
793
794 return mt9p031_write(client, MT9P031_BLACK_LEVEL_CALIBRATION,
795 ctrl->val ? 0 : MT9P031_BLC_MANUAL_BLC);
796
797 case V4L2_CID_BLC_TARGET_LEVEL:
798 return mt9p031_write(client, MT9P031_ROW_BLACK_TARGET,
799 ctrl->val);
800
801 case V4L2_CID_BLC_ANALOG_OFFSET:
802 data = ctrl->val & ((1 << 9) - 1);
803
804 ret = mt9p031_write(client, MT9P031_GREEN1_OFFSET, data);
805 if (ret < 0)
806 return ret;
807 ret = mt9p031_write(client, MT9P031_GREEN2_OFFSET, data);
808 if (ret < 0)
809 return ret;
810 ret = mt9p031_write(client, MT9P031_RED_OFFSET, data);
811 if (ret < 0)
812 return ret;
813 return mt9p031_write(client, MT9P031_BLUE_OFFSET, data);
814
815 case V4L2_CID_BLC_DIGITAL_OFFSET:
816 return mt9p031_write(client, MT9P031_ROW_BLACK_DEF_OFFSET,
817 ctrl->val & ((1 << 12) - 1));
818 }
819
820 return 0;
821}
822
823static const struct v4l2_ctrl_ops mt9p031_ctrl_ops = {
824 .s_ctrl = mt9p031_s_ctrl,
825};
826
827static const char * const mt9p031_test_pattern_menu[] = {
828 "Disabled",
829 "Color Field",
830 "Horizontal Gradient",
831 "Vertical Gradient",
832 "Diagonal Gradient",
833 "Classic Test Pattern",
834 "Walking 1s",
835 "Monochrome Horizontal Bars",
836 "Monochrome Vertical Bars",
837 "Vertical Color Bars",
838};
839
840static const struct v4l2_ctrl_config mt9p031_ctrls[] = {
841 {
842 .ops = &mt9p031_ctrl_ops,
843 .id = V4L2_CID_BLC_AUTO,
844 .type = V4L2_CTRL_TYPE_BOOLEAN,
845 .name = "BLC, Auto",
846 .min = 0,
847 .max = 1,
848 .step = 1,
849 .def = 1,
850 .flags = 0,
851 }, {
852 .ops = &mt9p031_ctrl_ops,
853 .id = V4L2_CID_BLC_TARGET_LEVEL,
854 .type = V4L2_CTRL_TYPE_INTEGER,
855 .name = "BLC Target Level",
856 .min = 0,
857 .max = 4095,
858 .step = 1,
859 .def = 168,
860 .flags = 0,
861 }, {
862 .ops = &mt9p031_ctrl_ops,
863 .id = V4L2_CID_BLC_ANALOG_OFFSET,
864 .type = V4L2_CTRL_TYPE_INTEGER,
865 .name = "BLC Analog Offset",
866 .min = -255,
867 .max = 255,
868 .step = 1,
869 .def = 32,
870 .flags = 0,
871 }, {
872 .ops = &mt9p031_ctrl_ops,
873 .id = V4L2_CID_BLC_DIGITAL_OFFSET,
874 .type = V4L2_CTRL_TYPE_INTEGER,
875 .name = "BLC Digital Offset",
876 .min = -2048,
877 .max = 2047,
878 .step = 1,
879 .def = 40,
880 .flags = 0,
881 }
882};
883
884
885
886
887
888static int mt9p031_set_power(struct v4l2_subdev *subdev, int on)
889{
890 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
891 int ret = 0;
892
893 mutex_lock(&mt9p031->power_lock);
894
895
896
897
898 if (mt9p031->power_count == !on) {
899 ret = __mt9p031_set_power(mt9p031, !!on);
900 if (ret < 0)
901 goto out;
902 }
903
904
905 mt9p031->power_count += on ? 1 : -1;
906 WARN_ON(mt9p031->power_count < 0);
907
908out:
909 mutex_unlock(&mt9p031->power_lock);
910 return ret;
911}
912
913
914
915
916
917static int mt9p031_registered(struct v4l2_subdev *subdev)
918{
919 struct i2c_client *client = v4l2_get_subdevdata(subdev);
920 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
921 s32 data;
922 int ret;
923
924 ret = mt9p031_power_on(mt9p031);
925 if (ret < 0) {
926 dev_err(&client->dev, "MT9P031 power up failed\n");
927 return ret;
928 }
929
930
931 data = mt9p031_read(client, MT9P031_CHIP_VERSION);
932 mt9p031_power_off(mt9p031);
933
934 if (data != MT9P031_CHIP_VERSION_VALUE) {
935 dev_err(&client->dev, "MT9P031 not detected, wrong version "
936 "0x%04x\n", data);
937 return -ENODEV;
938 }
939
940 dev_info(&client->dev, "MT9P031 detected at address 0x%02x\n",
941 client->addr);
942
943 return 0;
944}
945
946static int mt9p031_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
947{
948 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
949 struct v4l2_mbus_framefmt *format;
950 struct v4l2_rect *crop;
951
952 crop = v4l2_subdev_get_try_crop(subdev, fh->state, 0);
953 crop->left = MT9P031_COLUMN_START_DEF;
954 crop->top = MT9P031_ROW_START_DEF;
955 crop->width = MT9P031_WINDOW_WIDTH_DEF;
956 crop->height = MT9P031_WINDOW_HEIGHT_DEF;
957
958 format = v4l2_subdev_get_try_format(subdev, fh->state, 0);
959
960 if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
961 format->code = MEDIA_BUS_FMT_Y12_1X12;
962 else
963 format->code = MEDIA_BUS_FMT_SGRBG12_1X12;
964
965 format->width = MT9P031_WINDOW_WIDTH_DEF;
966 format->height = MT9P031_WINDOW_HEIGHT_DEF;
967 format->field = V4L2_FIELD_NONE;
968 format->colorspace = V4L2_COLORSPACE_SRGB;
969
970 return mt9p031_set_power(subdev, 1);
971}
972
973static int mt9p031_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
974{
975 return mt9p031_set_power(subdev, 0);
976}
977
978static const struct v4l2_subdev_core_ops mt9p031_subdev_core_ops = {
979 .s_power = mt9p031_set_power,
980};
981
982static const struct v4l2_subdev_video_ops mt9p031_subdev_video_ops = {
983 .s_stream = mt9p031_s_stream,
984};
985
986static const struct v4l2_subdev_pad_ops mt9p031_subdev_pad_ops = {
987 .enum_mbus_code = mt9p031_enum_mbus_code,
988 .enum_frame_size = mt9p031_enum_frame_size,
989 .get_fmt = mt9p031_get_format,
990 .set_fmt = mt9p031_set_format,
991 .get_selection = mt9p031_get_selection,
992 .set_selection = mt9p031_set_selection,
993};
994
995static const struct v4l2_subdev_ops mt9p031_subdev_ops = {
996 .core = &mt9p031_subdev_core_ops,
997 .video = &mt9p031_subdev_video_ops,
998 .pad = &mt9p031_subdev_pad_ops,
999};
1000
1001static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = {
1002 .registered = mt9p031_registered,
1003 .open = mt9p031_open,
1004 .close = mt9p031_close,
1005};
1006
1007
1008
1009
1010
1011static struct mt9p031_platform_data *
1012mt9p031_get_pdata(struct i2c_client *client)
1013{
1014 struct mt9p031_platform_data *pdata;
1015 struct device_node *np;
1016
1017 if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
1018 return client->dev.platform_data;
1019
1020 np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
1021 if (!np)
1022 return NULL;
1023
1024 pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
1025 if (!pdata)
1026 goto done;
1027
1028 of_property_read_u32(np, "input-clock-frequency", &pdata->ext_freq);
1029 of_property_read_u32(np, "pixel-clock-frequency", &pdata->target_freq);
1030
1031done:
1032 of_node_put(np);
1033 return pdata;
1034}
1035
1036static int mt9p031_probe(struct i2c_client *client,
1037 const struct i2c_device_id *did)
1038{
1039 struct mt9p031_platform_data *pdata = mt9p031_get_pdata(client);
1040 struct i2c_adapter *adapter = client->adapter;
1041 struct mt9p031 *mt9p031;
1042 unsigned int i;
1043 int ret;
1044
1045 if (pdata == NULL) {
1046 dev_err(&client->dev, "No platform data\n");
1047 return -EINVAL;
1048 }
1049
1050 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
1051 dev_warn(&client->dev,
1052 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
1053 return -EIO;
1054 }
1055
1056 mt9p031 = devm_kzalloc(&client->dev, sizeof(*mt9p031), GFP_KERNEL);
1057 if (mt9p031 == NULL)
1058 return -ENOMEM;
1059
1060 mt9p031->pdata = pdata;
1061 mt9p031->output_control = MT9P031_OUTPUT_CONTROL_DEF;
1062 mt9p031->mode2 = MT9P031_READ_MODE_2_ROW_BLC;
1063 mt9p031->model = did->driver_data;
1064
1065 mt9p031->regulators[0].supply = "vdd";
1066 mt9p031->regulators[1].supply = "vdd_io";
1067 mt9p031->regulators[2].supply = "vaa";
1068
1069 ret = devm_regulator_bulk_get(&client->dev, 3, mt9p031->regulators);
1070 if (ret < 0) {
1071 dev_err(&client->dev, "Unable to get regulators\n");
1072 return ret;
1073 }
1074
1075 mutex_init(&mt9p031->power_lock);
1076
1077 v4l2_ctrl_handler_init(&mt9p031->ctrls, ARRAY_SIZE(mt9p031_ctrls) + 6);
1078
1079 v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1080 V4L2_CID_EXPOSURE, MT9P031_SHUTTER_WIDTH_MIN,
1081 MT9P031_SHUTTER_WIDTH_MAX, 1,
1082 MT9P031_SHUTTER_WIDTH_DEF);
1083 v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1084 V4L2_CID_GAIN, MT9P031_GLOBAL_GAIN_MIN,
1085 MT9P031_GLOBAL_GAIN_MAX, 1, MT9P031_GLOBAL_GAIN_DEF);
1086 v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1087 V4L2_CID_HFLIP, 0, 1, 1, 0);
1088 v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1089 V4L2_CID_VFLIP, 0, 1, 1, 0);
1090 v4l2_ctrl_new_std(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1091 V4L2_CID_PIXEL_RATE, pdata->target_freq,
1092 pdata->target_freq, 1, pdata->target_freq);
1093 v4l2_ctrl_new_std_menu_items(&mt9p031->ctrls, &mt9p031_ctrl_ops,
1094 V4L2_CID_TEST_PATTERN,
1095 ARRAY_SIZE(mt9p031_test_pattern_menu) - 1, 0,
1096 0, mt9p031_test_pattern_menu);
1097
1098 for (i = 0; i < ARRAY_SIZE(mt9p031_ctrls); ++i)
1099 v4l2_ctrl_new_custom(&mt9p031->ctrls, &mt9p031_ctrls[i], NULL);
1100
1101 mt9p031->subdev.ctrl_handler = &mt9p031->ctrls;
1102
1103 if (mt9p031->ctrls.error) {
1104 printk(KERN_INFO "%s: control initialization error %d\n",
1105 __func__, mt9p031->ctrls.error);
1106 ret = mt9p031->ctrls.error;
1107 goto done;
1108 }
1109
1110 mt9p031->blc_auto = v4l2_ctrl_find(&mt9p031->ctrls, V4L2_CID_BLC_AUTO);
1111 mt9p031->blc_offset = v4l2_ctrl_find(&mt9p031->ctrls,
1112 V4L2_CID_BLC_DIGITAL_OFFSET);
1113
1114 v4l2_i2c_subdev_init(&mt9p031->subdev, client, &mt9p031_subdev_ops);
1115 mt9p031->subdev.internal_ops = &mt9p031_subdev_internal_ops;
1116
1117 mt9p031->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1118 mt9p031->pad.flags = MEDIA_PAD_FL_SOURCE;
1119 ret = media_entity_pads_init(&mt9p031->subdev.entity, 1, &mt9p031->pad);
1120 if (ret < 0)
1121 goto done;
1122
1123 mt9p031->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1124
1125 mt9p031->crop.width = MT9P031_WINDOW_WIDTH_DEF;
1126 mt9p031->crop.height = MT9P031_WINDOW_HEIGHT_DEF;
1127 mt9p031->crop.left = MT9P031_COLUMN_START_DEF;
1128 mt9p031->crop.top = MT9P031_ROW_START_DEF;
1129
1130 if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
1131 mt9p031->format.code = MEDIA_BUS_FMT_Y12_1X12;
1132 else
1133 mt9p031->format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
1134
1135 mt9p031->format.width = MT9P031_WINDOW_WIDTH_DEF;
1136 mt9p031->format.height = MT9P031_WINDOW_HEIGHT_DEF;
1137 mt9p031->format.field = V4L2_FIELD_NONE;
1138 mt9p031->format.colorspace = V4L2_COLORSPACE_SRGB;
1139
1140 mt9p031->reset = devm_gpiod_get_optional(&client->dev, "reset",
1141 GPIOD_OUT_HIGH);
1142
1143 ret = mt9p031_clk_setup(mt9p031);
1144 if (ret)
1145 goto done;
1146
1147 ret = v4l2_async_register_subdev(&mt9p031->subdev);
1148
1149done:
1150 if (ret < 0) {
1151 v4l2_ctrl_handler_free(&mt9p031->ctrls);
1152 media_entity_cleanup(&mt9p031->subdev.entity);
1153 mutex_destroy(&mt9p031->power_lock);
1154 }
1155
1156 return ret;
1157}
1158
1159static int mt9p031_remove(struct i2c_client *client)
1160{
1161 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
1162 struct mt9p031 *mt9p031 = to_mt9p031(subdev);
1163
1164 v4l2_ctrl_handler_free(&mt9p031->ctrls);
1165 v4l2_async_unregister_subdev(subdev);
1166 media_entity_cleanup(&subdev->entity);
1167 mutex_destroy(&mt9p031->power_lock);
1168
1169 return 0;
1170}
1171
1172static const struct i2c_device_id mt9p031_id[] = {
1173 { "mt9p031", MT9P031_MODEL_COLOR },
1174 { "mt9p031m", MT9P031_MODEL_MONOCHROME },
1175 { }
1176};
1177MODULE_DEVICE_TABLE(i2c, mt9p031_id);
1178
1179#if IS_ENABLED(CONFIG_OF)
1180static const struct of_device_id mt9p031_of_match[] = {
1181 { .compatible = "aptina,mt9p031", },
1182 { .compatible = "aptina,mt9p031m", },
1183 { },
1184};
1185MODULE_DEVICE_TABLE(of, mt9p031_of_match);
1186#endif
1187
1188static struct i2c_driver mt9p031_i2c_driver = {
1189 .driver = {
1190 .of_match_table = of_match_ptr(mt9p031_of_match),
1191 .name = "mt9p031",
1192 },
1193 .probe = mt9p031_probe,
1194 .remove = mt9p031_remove,
1195 .id_table = mt9p031_id,
1196};
1197
1198module_i2c_driver(mt9p031_i2c_driver);
1199
1200MODULE_DESCRIPTION("Aptina MT9P031 Camera driver");
1201MODULE_AUTHOR("Bastian Hecht <hechtb@gmail.com>");
1202MODULE_LICENSE("GPL v2");
1203
