1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Omnivision OV2680 CMOS Image Sensor driver
4 *
5 * Copyright (C) 2018 Linaro Ltd
6 *
7 * Based on OV5640 Sensor Driver
8 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
9 * Copyright (C) 2014-2017 Mentor Graphics Inc.
10 *
11 */
12
13#include <linux/clk.h>
14#include <linux/delay.h>
15#include <linux/err.h>
16#include <linux/gpio/consumer.h>
17#include <linux/i2c.h>
18#include <linux/init.h>
19#include <linux/mod_devicetable.h>
20#include <linux/module.h>
21#include <linux/pm_runtime.h>
22#include <linux/regmap.h>
23#include <linux/regulator/consumer.h>
24
25#include <media/v4l2-cci.h>
26#include <media/v4l2-common.h>
27#include <media/v4l2-ctrls.h>
28#include <media/v4l2-fwnode.h>
29#include <media/v4l2-subdev.h>
30
31#define OV2680_CHIP_ID 0x2680
32
33#define OV2680_REG_STREAM_CTRL CCI_REG8(0x0100)
34#define OV2680_REG_SOFT_RESET CCI_REG8(0x0103)
35
36#define OV2680_REG_CHIP_ID CCI_REG16(0x300a)
37#define OV2680_REG_SC_CMMN_SUB_ID CCI_REG8(0x302a)
38#define OV2680_REG_PLL_MULTIPLIER CCI_REG16(0x3081)
39
40#define OV2680_REG_EXPOSURE_PK CCI_REG24(0x3500)
41#define OV2680_REG_R_MANUAL CCI_REG8(0x3503)
42#define OV2680_REG_GAIN_PK CCI_REG16(0x350a)
43
44#define OV2680_REG_SENSOR_CTRL_0A CCI_REG8(0x370a)
45
46#define OV2680_REG_HORIZONTAL_START CCI_REG16(0x3800)
47#define OV2680_REG_VERTICAL_START CCI_REG16(0x3802)
48#define OV2680_REG_HORIZONTAL_END CCI_REG16(0x3804)
49#define OV2680_REG_VERTICAL_END CCI_REG16(0x3806)
50#define OV2680_REG_HORIZONTAL_OUTPUT_SIZE CCI_REG16(0x3808)
51#define OV2680_REG_VERTICAL_OUTPUT_SIZE CCI_REG16(0x380a)
52#define OV2680_REG_TIMING_HTS CCI_REG16(0x380c)
53#define OV2680_REG_TIMING_VTS CCI_REG16(0x380e)
54#define OV2680_REG_ISP_X_WIN CCI_REG16(0x3810)
55#define OV2680_REG_ISP_Y_WIN CCI_REG16(0x3812)
56#define OV2680_REG_X_INC CCI_REG8(0x3814)
57#define OV2680_REG_Y_INC CCI_REG8(0x3815)
58#define OV2680_REG_FORMAT1 CCI_REG8(0x3820)
59#define OV2680_REG_FORMAT2 CCI_REG8(0x3821)
60
61#define OV2680_REG_ISP_CTRL00 CCI_REG8(0x5080)
62
63#define OV2680_REG_X_WIN CCI_REG16(0x5704)
64#define OV2680_REG_Y_WIN CCI_REG16(0x5706)
65
66#define OV2680_FRAME_RATE 30
67
68#define OV2680_NATIVE_WIDTH 1616
69#define OV2680_NATIVE_HEIGHT 1216
70#define OV2680_NATIVE_START_LEFT 0
71#define OV2680_NATIVE_START_TOP 0
72#define OV2680_ACTIVE_WIDTH 1600
73#define OV2680_ACTIVE_HEIGHT 1200
74#define OV2680_ACTIVE_START_LEFT 8
75#define OV2680_ACTIVE_START_TOP 8
76#define OV2680_MIN_CROP_WIDTH 2
77#define OV2680_MIN_CROP_HEIGHT 2
78
79/* Fixed pre-div of 1/2 */
80#define OV2680_PLL_PREDIV0 2
81
82/* Pre-div configurable through reg 0x3080, left at its default of 0x02 : 1/2 */
83#define OV2680_PLL_PREDIV 2
84
85/* 66MHz pixel clock: 66MHz / 1704 * 1294 = 30fps */
86#define OV2680_PIXELS_PER_LINE 1704
87#define OV2680_LINES_PER_FRAME 1294
88
89/* If possible send 16 extra rows / lines to the ISP as padding */
90#define OV2680_END_MARGIN 16
91
92/* Max exposure time is VTS - 8 */
93#define OV2680_INTEGRATION_TIME_MARGIN 8
94
95#define OV2680_DEFAULT_WIDTH 800
96#define OV2680_DEFAULT_HEIGHT 600
97
98/* For enum_frame_size() full-size + binned-/quarter-size */
99#define OV2680_FRAME_SIZES 2
100
101static const char * const ov2680_supply_name[] = {
102 "DOVDD",
103 "DVDD",
104 "AVDD",
105};
106
107#define OV2680_NUM_SUPPLIES ARRAY_SIZE(ov2680_supply_name)
108
109enum {
110 OV2680_19_2_MHZ,
111 OV2680_24_MHZ,
112};
113
114static const unsigned long ov2680_xvclk_freqs[] = {
115 [OV2680_19_2_MHZ] = 19200000,
116 [OV2680_24_MHZ] = 24000000,
117};
118
119static const u8 ov2680_pll_multipliers[] = {
120 [OV2680_19_2_MHZ] = 69,
121 [OV2680_24_MHZ] = 55,
122};
123
124struct ov2680_ctrls {
125 struct v4l2_ctrl_handler handler;
126 struct v4l2_ctrl *exposure;
127 struct v4l2_ctrl *gain;
128 struct v4l2_ctrl *hflip;
129 struct v4l2_ctrl *vflip;
130 struct v4l2_ctrl *test_pattern;
131 struct v4l2_ctrl *link_freq;
132 struct v4l2_ctrl *pixel_rate;
133};
134
135struct ov2680_mode {
136 struct v4l2_rect crop;
137 struct v4l2_mbus_framefmt fmt;
138 struct v4l2_fract frame_interval;
139 bool binning;
140 u16 h_start;
141 u16 v_start;
142 u16 h_end;
143 u16 v_end;
144 u16 h_output_size;
145 u16 v_output_size;
146 u16 hts;
147 u16 vts;
148};
149
150struct ov2680_dev {
151 struct device *dev;
152 struct regmap *regmap;
153 struct v4l2_subdev sd;
154
155 struct media_pad pad;
156 struct clk *xvclk;
157 u32 xvclk_freq;
158 u8 pll_mult;
159 s64 link_freq[1];
160 u64 pixel_rate;
161 struct regulator_bulk_data supplies[OV2680_NUM_SUPPLIES];
162
163 struct gpio_desc *pwdn_gpio;
164 struct mutex lock; /* protect members */
165
166 bool is_streaming;
167
168 struct ov2680_ctrls ctrls;
169 struct ov2680_mode mode;
170};
171
172static const struct v4l2_rect ov2680_default_crop = {
173 .left = OV2680_ACTIVE_START_LEFT,
174 .top = OV2680_ACTIVE_START_TOP,
175 .width = OV2680_ACTIVE_WIDTH,
176 .height = OV2680_ACTIVE_HEIGHT,
177};
178
179static const char * const test_pattern_menu[] = {
180 "Disabled",
181 "Color Bars",
182 "Random Data",
183 "Square",
184 "Black Image",
185};
186
187static const int ov2680_hv_flip_bayer_order[] = {
188 MEDIA_BUS_FMT_SBGGR10_1X10,
189 MEDIA_BUS_FMT_SGRBG10_1X10,
190 MEDIA_BUS_FMT_SGBRG10_1X10,
191 MEDIA_BUS_FMT_SRGGB10_1X10,
192};
193
194static const struct reg_sequence ov2680_global_setting[] = {
195 /* MIPI PHY, 0x10 -> 0x1c enable bp_c_hs_en_lat and bp_d_hs_en_lat */
196 {0x3016, 0x1c},
197
198 /* R MANUAL set exposure and gain to manual (hw does not do auto) */
199 {0x3503, 0x03},
200
201 /* Analog control register tweaks */
202 {0x3603, 0x39}, /* Reset value 0x99 */
203 {0x3604, 0x24}, /* Reset value 0x74 */
204 {0x3621, 0x37}, /* Reset value 0x44 */
205
206 /* Sensor control register tweaks */
207 {0x3701, 0x64}, /* Reset value 0x61 */
208 {0x3705, 0x3c}, /* Reset value 0x21 */
209 {0x370c, 0x50}, /* Reset value 0x10 */
210 {0x370d, 0xc0}, /* Reset value 0x00 */
211 {0x3718, 0x88}, /* Reset value 0x80 */
212
213 /* PSRAM tweaks */
214 {0x3781, 0x80}, /* Reset value 0x00 */
215 {0x3784, 0x0c}, /* Reset value 0x00, based on OV2680_R1A_AM10.ovt */
216 {0x3789, 0x60}, /* Reset value 0x50 */
217
218 /* BLC CTRL00 0x01 -> 0x81 set avg_weight to 8 */
219 {0x4000, 0x81},
220
221 /* Set black level compensation range to 0 - 3 (default 0 - 11) */
222 {0x4008, 0x00},
223 {0x4009, 0x03},
224
225 /* VFIFO R2 0x00 -> 0x02 set Frame reset enable */
226 {0x4602, 0x02},
227
228 /* MIPI ctrl CLK PREPARE MIN change from 0x26 (38) -> 0x36 (54) */
229 {0x481f, 0x36},
230
231 /* MIPI ctrl CLK LPX P MIN change from 0x32 (50) -> 0x36 (54) */
232 {0x4825, 0x36},
233
234 /* R ISP CTRL2 0x20 -> 0x30, set sof_sel bit */
235 {0x5002, 0x30},
236
237 /*
238 * Window CONTROL 0x00 -> 0x01, enable manual window control,
239 * this is necessary for full size flip and mirror support.
240 */
241 {0x5708, 0x01},
242
243 /*
244 * DPC CTRL0 0x14 -> 0x3e, set enable_tail, enable_3x3_cluster
245 * and enable_general_tail bits based OV2680_R1A_AM10.ovt.
246 */
247 {0x5780, 0x3e},
248
249 /* DPC MORE CONNECTION CASE THRE 0x0c (12) -> 0x02 (2) */
250 {0x5788, 0x02},
251
252 /* DPC GAIN LIST1 0x0f (15) -> 0x08 (8) */
253 {0x578e, 0x08},
254
255 /* DPC GAIN LIST2 0x3f (63) -> 0x0c (12) */
256 {0x578f, 0x0c},
257
258 /* DPC THRE RATIO 0x04 (4) -> 0x00 (0) */
259 {0x5792, 0x00},
260};
261
262static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd)
263{
264 return container_of(sd, struct ov2680_dev, sd);
265}
266
267static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
268{
269 return &container_of(ctrl->handler, struct ov2680_dev,
270 ctrls.handler)->sd;
271}
272
273static void ov2680_power_up(struct ov2680_dev *sensor)
274{
275 if (!sensor->pwdn_gpio)
276 return;
277
278 gpiod_set_value(desc: sensor->pwdn_gpio, value: 0);
279 usleep_range(min: 5000, max: 10000);
280}
281
282static void ov2680_power_down(struct ov2680_dev *sensor)
283{
284 if (!sensor->pwdn_gpio)
285 return;
286
287 gpiod_set_value(desc: sensor->pwdn_gpio, value: 1);
288 usleep_range(min: 5000, max: 10000);
289}
290
291static void ov2680_set_bayer_order(struct ov2680_dev *sensor,
292 struct v4l2_mbus_framefmt *fmt)
293{
294 int hv_flip = 0;
295
296 if (sensor->ctrls.vflip && sensor->ctrls.vflip->val)
297 hv_flip += 1;
298
299 if (sensor->ctrls.hflip && sensor->ctrls.hflip->val)
300 hv_flip += 2;
301
302 fmt->code = ov2680_hv_flip_bayer_order[hv_flip];
303}
304
305static struct v4l2_mbus_framefmt *
306__ov2680_get_pad_format(struct ov2680_dev *sensor,
307 struct v4l2_subdev_state *state,
308 unsigned int pad,
309 enum v4l2_subdev_format_whence which)
310{
311 if (which == V4L2_SUBDEV_FORMAT_TRY)
312 return v4l2_subdev_state_get_format(state, pad);
313
314 return &sensor->mode.fmt;
315}
316
317static struct v4l2_rect *
318__ov2680_get_pad_crop(struct ov2680_dev *sensor,
319 struct v4l2_subdev_state *state,
320 unsigned int pad,
321 enum v4l2_subdev_format_whence which)
322{
323 if (which == V4L2_SUBDEV_FORMAT_TRY)
324 return v4l2_subdev_state_get_crop(state, pad);
325
326 return &sensor->mode.crop;
327}
328
329static void ov2680_fill_format(struct ov2680_dev *sensor,
330 struct v4l2_mbus_framefmt *fmt,
331 unsigned int width, unsigned int height)
332{
333 memset(fmt, 0, sizeof(*fmt));
334 fmt->width = width;
335 fmt->height = height;
336 fmt->field = V4L2_FIELD_NONE;
337 fmt->colorspace = V4L2_COLORSPACE_SRGB;
338 ov2680_set_bayer_order(sensor, fmt);
339}
340
341static void ov2680_calc_mode(struct ov2680_dev *sensor)
342{
343 int width = sensor->mode.fmt.width;
344 int height = sensor->mode.fmt.height;
345 int orig_width = width;
346 int orig_height = height;
347
348 if (width <= (sensor->mode.crop.width / 2) &&
349 height <= (sensor->mode.crop.height / 2)) {
350 sensor->mode.binning = true;
351 width *= 2;
352 height *= 2;
353 } else {
354 sensor->mode.binning = false;
355 }
356
357 sensor->mode.h_start = (sensor->mode.crop.left +
358 (sensor->mode.crop.width - width) / 2) & ~1;
359 sensor->mode.v_start = (sensor->mode.crop.top +
360 (sensor->mode.crop.height - height) / 2) & ~1;
361 sensor->mode.h_end =
362 min(sensor->mode.h_start + width + OV2680_END_MARGIN - 1,
363 OV2680_NATIVE_WIDTH - 1);
364 sensor->mode.v_end =
365 min(sensor->mode.v_start + height + OV2680_END_MARGIN - 1,
366 OV2680_NATIVE_HEIGHT - 1);
367 sensor->mode.h_output_size = orig_width;
368 sensor->mode.v_output_size = orig_height;
369 sensor->mode.hts = OV2680_PIXELS_PER_LINE;
370 sensor->mode.vts = OV2680_LINES_PER_FRAME;
371}
372
373static int ov2680_set_mode(struct ov2680_dev *sensor)
374{
375 u8 sensor_ctrl_0a, inc, fmt1, fmt2;
376 int ret = 0;
377
378 if (sensor->mode.binning) {
379 sensor_ctrl_0a = 0x23;
380 inc = 0x31;
381 fmt1 = 0xc2;
382 fmt2 = 0x01;
383 } else {
384 sensor_ctrl_0a = 0x21;
385 inc = 0x11;
386 fmt1 = 0xc0;
387 fmt2 = 0x00;
388 }
389
390 cci_write(map: sensor->regmap, OV2680_REG_SENSOR_CTRL_0A,
391 val: sensor_ctrl_0a, err: &ret);
392 cci_write(map: sensor->regmap, OV2680_REG_HORIZONTAL_START,
393 val: sensor->mode.h_start, err: &ret);
394 cci_write(map: sensor->regmap, OV2680_REG_VERTICAL_START,
395 val: sensor->mode.v_start, err: &ret);
396 cci_write(map: sensor->regmap, OV2680_REG_HORIZONTAL_END,
397 val: sensor->mode.h_end, err: &ret);
398 cci_write(map: sensor->regmap, OV2680_REG_VERTICAL_END,
399 val: sensor->mode.v_end, err: &ret);
400 cci_write(map: sensor->regmap, OV2680_REG_HORIZONTAL_OUTPUT_SIZE,
401 val: sensor->mode.h_output_size, err: &ret);
402 cci_write(map: sensor->regmap, OV2680_REG_VERTICAL_OUTPUT_SIZE,
403 val: sensor->mode.v_output_size, err: &ret);
404 cci_write(map: sensor->regmap, OV2680_REG_TIMING_HTS,
405 val: sensor->mode.hts, err: &ret);
406 cci_write(map: sensor->regmap, OV2680_REG_TIMING_VTS,
407 val: sensor->mode.vts, err: &ret);
408 cci_write(map: sensor->regmap, OV2680_REG_ISP_X_WIN, val: 0, err: &ret);
409 cci_write(map: sensor->regmap, OV2680_REG_ISP_Y_WIN, val: 0, err: &ret);
410 cci_write(map: sensor->regmap, OV2680_REG_X_INC, val: inc, err: &ret);
411 cci_write(map: sensor->regmap, OV2680_REG_Y_INC, val: inc, err: &ret);
412 cci_write(map: sensor->regmap, OV2680_REG_X_WIN,
413 val: sensor->mode.h_output_size, err: &ret);
414 cci_write(map: sensor->regmap, OV2680_REG_Y_WIN,
415 val: sensor->mode.v_output_size, err: &ret);
416 cci_write(map: sensor->regmap, OV2680_REG_FORMAT1, val: fmt1, err: &ret);
417 cci_write(map: sensor->regmap, OV2680_REG_FORMAT2, val: fmt2, err: &ret);
418
419 return ret;
420}
421
422static int ov2680_set_vflip(struct ov2680_dev *sensor, s32 val)
423{
424 int ret;
425
426 if (sensor->is_streaming)
427 return -EBUSY;
428
429 ret = cci_update_bits(map: sensor->regmap, OV2680_REG_FORMAT1,
430 BIT(2), val: val ? BIT(2) : 0, NULL);
431 if (ret < 0)
432 return ret;
433
434 ov2680_set_bayer_order(sensor, fmt: &sensor->mode.fmt);
435 return 0;
436}
437
438static int ov2680_set_hflip(struct ov2680_dev *sensor, s32 val)
439{
440 int ret;
441
442 if (sensor->is_streaming)
443 return -EBUSY;
444
445 ret = cci_update_bits(map: sensor->regmap, OV2680_REG_FORMAT2,
446 BIT(2), val: val ? BIT(2) : 0, NULL);
447 if (ret < 0)
448 return ret;
449
450 ov2680_set_bayer_order(sensor, fmt: &sensor->mode.fmt);
451 return 0;
452}
453
454static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value)
455{
456 int ret = 0;
457
458 if (!value)
459 return cci_update_bits(map: sensor->regmap, OV2680_REG_ISP_CTRL00,
460 BIT(7), val: 0, NULL);
461
462 cci_update_bits(map: sensor->regmap, OV2680_REG_ISP_CTRL00,
463 mask: 0x03, val: value - 1, err: &ret);
464 cci_update_bits(map: sensor->regmap, OV2680_REG_ISP_CTRL00,
465 BIT(7), BIT(7), err: &ret);
466
467 return ret;
468}
469
470static int ov2680_gain_set(struct ov2680_dev *sensor, u32 gain)
471{
472 return cci_write(map: sensor->regmap, OV2680_REG_GAIN_PK, val: gain, NULL);
473}
474
475static int ov2680_exposure_set(struct ov2680_dev *sensor, u32 exp)
476{
477 return cci_write(map: sensor->regmap, OV2680_REG_EXPOSURE_PK, val: exp << 4,
478 NULL);
479}
480
481static int ov2680_stream_enable(struct ov2680_dev *sensor)
482{
483 int ret;
484
485 ret = cci_write(map: sensor->regmap, OV2680_REG_PLL_MULTIPLIER,
486 val: sensor->pll_mult, NULL);
487 if (ret < 0)
488 return ret;
489
490 ret = regmap_multi_reg_write(map: sensor->regmap,
491 regs: ov2680_global_setting,
492 ARRAY_SIZE(ov2680_global_setting));
493 if (ret < 0)
494 return ret;
495
496 ret = ov2680_set_mode(sensor);
497 if (ret < 0)
498 return ret;
499
500 /* Restore value of all ctrls */
501 ret = __v4l2_ctrl_handler_setup(hdl: &sensor->ctrls.handler);
502 if (ret < 0)
503 return ret;
504
505 return cci_write(map: sensor->regmap, OV2680_REG_STREAM_CTRL, val: 1, NULL);
506}
507
508static int ov2680_stream_disable(struct ov2680_dev *sensor)
509{
510 return cci_write(map: sensor->regmap, OV2680_REG_STREAM_CTRL, val: 0, NULL);
511}
512
513static int ov2680_power_off(struct ov2680_dev *sensor)
514{
515 clk_disable_unprepare(clk: sensor->xvclk);
516 ov2680_power_down(sensor);
517 regulator_bulk_disable(OV2680_NUM_SUPPLIES, consumers: sensor->supplies);
518 return 0;
519}
520
521static int ov2680_power_on(struct ov2680_dev *sensor)
522{
523 int ret;
524
525 ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, consumers: sensor->supplies);
526 if (ret < 0) {
527 dev_err(sensor->dev, "failed to enable regulators: %d\n", ret);
528 return ret;
529 }
530
531 if (!sensor->pwdn_gpio) {
532 ret = cci_write(map: sensor->regmap, OV2680_REG_SOFT_RESET, val: 0x01,
533 NULL);
534 if (ret != 0) {
535 dev_err(sensor->dev, "sensor soft reset failed\n");
536 goto err_disable_regulators;
537 }
538 usleep_range(min: 1000, max: 2000);
539 } else {
540 ov2680_power_down(sensor);
541 ov2680_power_up(sensor);
542 }
543
544 ret = clk_prepare_enable(clk: sensor->xvclk);
545 if (ret < 0)
546 goto err_disable_regulators;
547
548 return 0;
549
550err_disable_regulators:
551 regulator_bulk_disable(OV2680_NUM_SUPPLIES, consumers: sensor->supplies);
552 return ret;
553}
554
555static int ov2680_get_frame_interval(struct v4l2_subdev *sd,
556 struct v4l2_subdev_state *sd_state,
557 struct v4l2_subdev_frame_interval *fi)
558{
559 struct ov2680_dev *sensor = to_ov2680_dev(sd);
560
561 /*
562 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2
563 * subdev active state API.
564 */
565 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE)
566 return -EINVAL;
567
568 mutex_lock(&sensor->lock);
569 fi->interval = sensor->mode.frame_interval;
570 mutex_unlock(lock: &sensor->lock);
571
572 return 0;
573}
574
575static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
576{
577 struct ov2680_dev *sensor = to_ov2680_dev(sd);
578 int ret = 0;
579
580 mutex_lock(&sensor->lock);
581
582 if (sensor->is_streaming == !!enable)
583 goto unlock;
584
585 if (enable) {
586 ret = pm_runtime_resume_and_get(dev: sensor->sd.dev);
587 if (ret < 0)
588 goto unlock;
589
590 ret = ov2680_stream_enable(sensor);
591 if (ret < 0) {
592 pm_runtime_put(dev: sensor->sd.dev);
593 goto unlock;
594 }
595 } else {
596 ret = ov2680_stream_disable(sensor);
597 pm_runtime_put(dev: sensor->sd.dev);
598 }
599
600 sensor->is_streaming = !!enable;
601
602unlock:
603 mutex_unlock(lock: &sensor->lock);
604
605 return ret;
606}
607
608static int ov2680_enum_mbus_code(struct v4l2_subdev *sd,
609 struct v4l2_subdev_state *sd_state,
610 struct v4l2_subdev_mbus_code_enum *code)
611{
612 struct ov2680_dev *sensor = to_ov2680_dev(sd);
613
614 if (code->index != 0)
615 return -EINVAL;
616
617 code->code = sensor->mode.fmt.code;
618
619 return 0;
620}
621
622static int ov2680_get_fmt(struct v4l2_subdev *sd,
623 struct v4l2_subdev_state *sd_state,
624 struct v4l2_subdev_format *format)
625{
626 struct ov2680_dev *sensor = to_ov2680_dev(sd);
627 struct v4l2_mbus_framefmt *fmt;
628
629 fmt = __ov2680_get_pad_format(sensor, state: sd_state, pad: format->pad,
630 which: format->which);
631
632 mutex_lock(&sensor->lock);
633 format->format = *fmt;
634 mutex_unlock(lock: &sensor->lock);
635
636 return 0;
637}
638
639static int ov2680_set_fmt(struct v4l2_subdev *sd,
640 struct v4l2_subdev_state *sd_state,
641 struct v4l2_subdev_format *format)
642{
643 struct ov2680_dev *sensor = to_ov2680_dev(sd);
644 struct v4l2_mbus_framefmt *try_fmt;
645 const struct v4l2_rect *crop;
646 unsigned int width, height;
647 int ret = 0;
648
649 crop = __ov2680_get_pad_crop(sensor, state: sd_state, pad: format->pad,
650 which: format->which);
651
652 /* Limit set_fmt max size to crop width / height */
653 width = clamp_val(ALIGN(format->format.width, 2),
654 OV2680_MIN_CROP_WIDTH, crop->width);
655 height = clamp_val(ALIGN(format->format.height, 2),
656 OV2680_MIN_CROP_HEIGHT, crop->height);
657
658 ov2680_fill_format(sensor, fmt: &format->format, width, height);
659
660 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
661 try_fmt = v4l2_subdev_state_get_format(sd_state, 0);
662 *try_fmt = format->format;
663 return 0;
664 }
665
666 mutex_lock(&sensor->lock);
667
668 if (sensor->is_streaming) {
669 ret = -EBUSY;
670 goto unlock;
671 }
672
673 sensor->mode.fmt = format->format;
674 ov2680_calc_mode(sensor);
675
676unlock:
677 mutex_unlock(lock: &sensor->lock);
678
679 return ret;
680}
681
682static int ov2680_get_selection(struct v4l2_subdev *sd,
683 struct v4l2_subdev_state *state,
684 struct v4l2_subdev_selection *sel)
685{
686 struct ov2680_dev *sensor = to_ov2680_dev(sd);
687
688 switch (sel->target) {
689 case V4L2_SEL_TGT_CROP:
690 mutex_lock(&sensor->lock);
691 sel->r = *__ov2680_get_pad_crop(sensor, state, pad: sel->pad,
692 which: sel->which);
693 mutex_unlock(lock: &sensor->lock);
694 break;
695 case V4L2_SEL_TGT_NATIVE_SIZE:
696 case V4L2_SEL_TGT_CROP_BOUNDS:
697 sel->r.top = 0;
698 sel->r.left = 0;
699 sel->r.width = OV2680_NATIVE_WIDTH;
700 sel->r.height = OV2680_NATIVE_HEIGHT;
701 break;
702 case V4L2_SEL_TGT_CROP_DEFAULT:
703 sel->r = ov2680_default_crop;
704 break;
705 default:
706 return -EINVAL;
707 }
708
709 return 0;
710}
711
712static int ov2680_set_selection(struct v4l2_subdev *sd,
713 struct v4l2_subdev_state *state,
714 struct v4l2_subdev_selection *sel)
715{
716 struct ov2680_dev *sensor = to_ov2680_dev(sd);
717 struct v4l2_mbus_framefmt *format;
718 struct v4l2_rect *crop;
719 struct v4l2_rect rect;
720
721 if (sel->target != V4L2_SEL_TGT_CROP)
722 return -EINVAL;
723
724 /*
725 * Clamp the boundaries of the crop rectangle to the size of the sensor
726 * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
727 * disrupted.
728 */
729 rect.left = clamp_val(ALIGN(sel->r.left, 2),
730 OV2680_NATIVE_START_LEFT, OV2680_NATIVE_WIDTH);
731 rect.top = clamp_val(ALIGN(sel->r.top, 2),
732 OV2680_NATIVE_START_TOP, OV2680_NATIVE_HEIGHT);
733 rect.width = clamp_val(ALIGN(sel->r.width, 2),
734 OV2680_MIN_CROP_WIDTH, OV2680_NATIVE_WIDTH);
735 rect.height = clamp_val(ALIGN(sel->r.height, 2),
736 OV2680_MIN_CROP_HEIGHT, OV2680_NATIVE_HEIGHT);
737
738 /* Make sure the crop rectangle isn't outside the bounds of the array */
739 rect.width = min_t(unsigned int, rect.width,
740 OV2680_NATIVE_WIDTH - rect.left);
741 rect.height = min_t(unsigned int, rect.height,
742 OV2680_NATIVE_HEIGHT - rect.top);
743
744 crop = __ov2680_get_pad_crop(sensor, state, pad: sel->pad, which: sel->which);
745
746 mutex_lock(&sensor->lock);
747 if (rect.width != crop->width || rect.height != crop->height) {
748 /*
749 * Reset the output image size if the crop rectangle size has
750 * been modified.
751 */
752 format = __ov2680_get_pad_format(sensor, state, pad: sel->pad,
753 which: sel->which);
754 format->width = rect.width;
755 format->height = rect.height;
756 }
757
758 *crop = rect;
759 mutex_unlock(lock: &sensor->lock);
760
761 sel->r = rect;
762
763 return 0;
764}
765
766static int ov2680_init_state(struct v4l2_subdev *sd,
767 struct v4l2_subdev_state *sd_state)
768{
769 struct ov2680_dev *sensor = to_ov2680_dev(sd);
770
771 *v4l2_subdev_state_get_crop(sd_state, 0) = ov2680_default_crop;
772
773 ov2680_fill_format(sensor, v4l2_subdev_state_get_format(sd_state, 0),
774 OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
775 return 0;
776}
777
778static int ov2680_enum_frame_size(struct v4l2_subdev *sd,
779 struct v4l2_subdev_state *sd_state,
780 struct v4l2_subdev_frame_size_enum *fse)
781{
782 struct ov2680_dev *sensor = to_ov2680_dev(sd);
783 struct v4l2_rect *crop;
784
785 if (fse->index >= OV2680_FRAME_SIZES)
786 return -EINVAL;
787
788 crop = __ov2680_get_pad_crop(sensor, state: sd_state, pad: fse->pad, which: fse->which);
789 if (!crop)
790 return -EINVAL;
791
792 fse->min_width = crop->width / (fse->index + 1);
793 fse->min_height = crop->height / (fse->index + 1);
794 fse->max_width = fse->min_width;
795 fse->max_height = fse->min_height;
796
797 return 0;
798}
799
800static bool ov2680_valid_frame_size(struct v4l2_subdev *sd,
801 struct v4l2_subdev_state *sd_state,
802 struct v4l2_subdev_frame_interval_enum *fie)
803{
804 struct v4l2_subdev_frame_size_enum fse = {
805 .pad = fie->pad,
806 .which = fie->which,
807 };
808 int i;
809
810 for (i = 0; i < OV2680_FRAME_SIZES; i++) {
811 fse.index = i;
812
813 if (ov2680_enum_frame_size(sd, sd_state, fse: &fse))
814 return false;
815
816 if (fie->width == fse.min_width &&
817 fie->height == fse.min_height)
818 return true;
819 }
820
821 return false;
822}
823
824static int ov2680_enum_frame_interval(struct v4l2_subdev *sd,
825 struct v4l2_subdev_state *sd_state,
826 struct v4l2_subdev_frame_interval_enum *fie)
827{
828 struct ov2680_dev *sensor = to_ov2680_dev(sd);
829
830 /* Only 1 framerate */
831 if (fie->index || !ov2680_valid_frame_size(sd, sd_state, fie))
832 return -EINVAL;
833
834 fie->interval = sensor->mode.frame_interval;
835
836 return 0;
837}
838
839static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
840{
841 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
842 struct ov2680_dev *sensor = to_ov2680_dev(sd);
843 int ret;
844
845 /* Only apply changes to the controls if the device is powered up */
846 if (!pm_runtime_get_if_in_use(dev: sensor->sd.dev)) {
847 ov2680_set_bayer_order(sensor, fmt: &sensor->mode.fmt);
848 return 0;
849 }
850
851 switch (ctrl->id) {
852 case V4L2_CID_ANALOGUE_GAIN:
853 ret = ov2680_gain_set(sensor, gain: ctrl->val);
854 break;
855 case V4L2_CID_EXPOSURE:
856 ret = ov2680_exposure_set(sensor, exp: ctrl->val);
857 break;
858 case V4L2_CID_VFLIP:
859 ret = ov2680_set_vflip(sensor, val: ctrl->val);
860 break;
861 case V4L2_CID_HFLIP:
862 ret = ov2680_set_hflip(sensor, val: ctrl->val);
863 break;
864 case V4L2_CID_TEST_PATTERN:
865 ret = ov2680_test_pattern_set(sensor, value: ctrl->val);
866 break;
867 default:
868 ret = -EINVAL;
869 break;
870 }
871
872 pm_runtime_put(dev: sensor->sd.dev);
873 return ret;
874}
875
876static const struct v4l2_ctrl_ops ov2680_ctrl_ops = {
877 .s_ctrl = ov2680_s_ctrl,
878};
879
880static const struct v4l2_subdev_video_ops ov2680_video_ops = {
881 .s_stream = ov2680_s_stream,
882};
883
884static const struct v4l2_subdev_pad_ops ov2680_pad_ops = {
885 .enum_mbus_code = ov2680_enum_mbus_code,
886 .enum_frame_size = ov2680_enum_frame_size,
887 .enum_frame_interval = ov2680_enum_frame_interval,
888 .get_fmt = ov2680_get_fmt,
889 .set_fmt = ov2680_set_fmt,
890 .get_selection = ov2680_get_selection,
891 .set_selection = ov2680_set_selection,
892 .get_frame_interval = ov2680_get_frame_interval,
893 .set_frame_interval = ov2680_get_frame_interval,
894};
895
896static const struct v4l2_subdev_ops ov2680_subdev_ops = {
897 .video = &ov2680_video_ops,
898 .pad = &ov2680_pad_ops,
899};
900
901static const struct v4l2_subdev_internal_ops ov2680_internal_ops = {
902 .init_state = ov2680_init_state,
903};
904
905static int ov2680_mode_init(struct ov2680_dev *sensor)
906{
907 /* set initial mode */
908 sensor->mode.crop = ov2680_default_crop;
909 ov2680_fill_format(sensor, fmt: &sensor->mode.fmt,
910 OV2680_DEFAULT_WIDTH, OV2680_DEFAULT_HEIGHT);
911 ov2680_calc_mode(sensor);
912
913 sensor->mode.frame_interval.denominator = OV2680_FRAME_RATE;
914 sensor->mode.frame_interval.numerator = 1;
915
916 return 0;
917}
918
919static int ov2680_v4l2_register(struct ov2680_dev *sensor)
920{
921 struct i2c_client *client = to_i2c_client(sensor->dev);
922 const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops;
923 struct ov2680_ctrls *ctrls = &sensor->ctrls;
924 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
925 int exp_max = OV2680_LINES_PER_FRAME - OV2680_INTEGRATION_TIME_MARGIN;
926 int ret = 0;
927
928 v4l2_i2c_subdev_init(sd: &sensor->sd, client, ops: &ov2680_subdev_ops);
929 sensor->sd.internal_ops = &ov2680_internal_ops;
930
931 sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
932 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
933 sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
934
935 ret = media_entity_pads_init(entity: &sensor->sd.entity, num_pads: 1, pads: &sensor->pad);
936 if (ret < 0)
937 return ret;
938
939 v4l2_ctrl_handler_init(hdl, 5);
940
941 hdl->lock = &sensor->lock;
942
943 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, min: 0, max: 1, step: 1, def: 0);
944 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, min: 0, max: 1, step: 1, def: 0);
945
946 ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl,
947 ops: &ov2680_ctrl_ops, V4L2_CID_TEST_PATTERN,
948 ARRAY_SIZE(test_pattern_menu) - 1,
949 mask: 0, def: 0, qmenu: test_pattern_menu);
950
951 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
952 min: 0, max: exp_max, step: 1, def: exp_max);
953
954 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
955 min: 0, max: 1023, step: 1, def: 250);
956
957 ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ,
958 max: 0, def: 0, qmenu_int: sensor->link_freq);
959 ctrls->pixel_rate = v4l2_ctrl_new_std(hdl, NULL, V4L2_CID_PIXEL_RATE,
960 min: 0, max: sensor->pixel_rate,
961 step: 1, def: sensor->pixel_rate);
962
963 if (hdl->error) {
964 ret = hdl->error;
965 goto cleanup_entity;
966 }
967
968 ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
969 ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
970 ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
971
972 sensor->sd.ctrl_handler = hdl;
973
974 ret = v4l2_async_register_subdev(sd: &sensor->sd);
975 if (ret < 0)
976 goto cleanup_entity;
977
978 return 0;
979
980cleanup_entity:
981 media_entity_cleanup(entity: &sensor->sd.entity);
982 v4l2_ctrl_handler_free(hdl);
983
984 return ret;
985}
986
987static int ov2680_get_regulators(struct ov2680_dev *sensor)
988{
989 int i;
990
991 for (i = 0; i < OV2680_NUM_SUPPLIES; i++)
992 sensor->supplies[i].supply = ov2680_supply_name[i];
993
994 return devm_regulator_bulk_get(dev: sensor->dev,
995 OV2680_NUM_SUPPLIES, consumers: sensor->supplies);
996}
997
998static int ov2680_check_id(struct ov2680_dev *sensor)
999{
1000 u64 chip_id, rev;
1001 int ret = 0;
1002
1003 cci_read(map: sensor->regmap, OV2680_REG_CHIP_ID, val: &chip_id, err: &ret);
1004 cci_read(map: sensor->regmap, OV2680_REG_SC_CMMN_SUB_ID, val: &rev, err: &ret);
1005 if (ret < 0) {
1006 dev_err(sensor->dev, "failed to read chip id\n");
1007 return ret;
1008 }
1009
1010 if (chip_id != OV2680_CHIP_ID) {
1011 dev_err(sensor->dev, "chip id: 0x%04llx does not match expected 0x%04x\n",
1012 chip_id, OV2680_CHIP_ID);
1013 return -ENODEV;
1014 }
1015
1016 dev_info(sensor->dev, "sensor_revision id = 0x%llx, rev= %lld\n",
1017 chip_id, rev & 0x0f);
1018
1019 return 0;
1020}
1021
1022static int ov2680_parse_dt(struct ov2680_dev *sensor)
1023{
1024 struct v4l2_fwnode_endpoint bus_cfg = {
1025 .bus_type = V4L2_MBUS_CSI2_DPHY,
1026 };
1027 struct device *dev = sensor->dev;
1028 struct fwnode_handle *ep_fwnode;
1029 struct gpio_desc *gpio;
1030 unsigned int rate = 0;
1031 int i, ret;
1032
1033 /*
1034 * Sometimes the fwnode graph is initialized by the bridge driver.
1035 * Bridge drivers doing this may also add GPIO mappings, wait for this.
1036 */
1037 ep_fwnode = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
1038 if (!ep_fwnode)
1039 return dev_err_probe(dev, err: -EPROBE_DEFER,
1040 fmt: "waiting for fwnode graph endpoint\n");
1041
1042 ret = v4l2_fwnode_endpoint_alloc_parse(fwnode: ep_fwnode, vep: &bus_cfg);
1043 fwnode_handle_put(fwnode: ep_fwnode);
1044 if (ret)
1045 return ret;
1046
1047 /*
1048 * The pin we want is named XSHUTDN in the datasheet. Linux sensor
1049 * drivers have standardized on using "powerdown" as con-id name
1050 * for powerdown or shutdown pins. Older DTB files use "reset",
1051 * so fallback to that if there is no "powerdown" pin.
1052 */
1053 gpio = devm_gpiod_get_optional(dev, con_id: "powerdown", flags: GPIOD_OUT_HIGH);
1054 if (!gpio)
1055 gpio = devm_gpiod_get_optional(dev, con_id: "reset", flags: GPIOD_OUT_HIGH);
1056
1057 ret = PTR_ERR_OR_ZERO(ptr: gpio);
1058 if (ret < 0) {
1059 dev_dbg(dev, "error while getting reset gpio: %d\n", ret);
1060 goto out_free_bus_cfg;
1061 }
1062
1063 sensor->pwdn_gpio = gpio;
1064
1065 sensor->xvclk = devm_clk_get_optional(dev, id: "xvclk");
1066 if (IS_ERR(ptr: sensor->xvclk)) {
1067 ret = dev_err_probe(dev, err: PTR_ERR(ptr: sensor->xvclk),
1068 fmt: "xvclk clock missing or invalid\n");
1069 goto out_free_bus_cfg;
1070 }
1071
1072 /*
1073 * We could have either a 24MHz or 19.2MHz clock rate from either DT or
1074 * ACPI... but we also need to support the weird IPU3 case which will
1075 * have an external clock AND a clock-frequency property. Check for the
1076 * clock-frequency property and if found, set that rate if we managed
1077 * to acquire a clock. This should cover the ACPI case. If the system
1078 * uses devicetree then the configured rate should already be set, so
1079 * we can just read it.
1080 */
1081 ret = fwnode_property_read_u32(dev_fwnode(dev), propname: "clock-frequency",
1082 val: &rate);
1083 if (ret && !sensor->xvclk) {
1084 dev_err_probe(dev, err: ret, fmt: "invalid clock config\n");
1085 goto out_free_bus_cfg;
1086 }
1087
1088 if (!ret && sensor->xvclk) {
1089 ret = clk_set_rate(clk: sensor->xvclk, rate);
1090 if (ret) {
1091 dev_err_probe(dev, err: ret, fmt: "failed to set clock rate\n");
1092 goto out_free_bus_cfg;
1093 }
1094 }
1095
1096 sensor->xvclk_freq = rate ?: clk_get_rate(clk: sensor->xvclk);
1097
1098 for (i = 0; i < ARRAY_SIZE(ov2680_xvclk_freqs); i++) {
1099 if (sensor->xvclk_freq == ov2680_xvclk_freqs[i])
1100 break;
1101 }
1102
1103 if (i == ARRAY_SIZE(ov2680_xvclk_freqs)) {
1104 ret = dev_err_probe(dev, err: -EINVAL,
1105 fmt: "unsupported xvclk frequency %d Hz\n",
1106 sensor->xvclk_freq);
1107 goto out_free_bus_cfg;
1108 }
1109
1110 sensor->pll_mult = ov2680_pll_multipliers[i];
1111
1112 sensor->link_freq[0] = sensor->xvclk_freq / OV2680_PLL_PREDIV0 /
1113 OV2680_PLL_PREDIV * sensor->pll_mult;
1114
1115 /* CSI-2 is double data rate, bus-format is 10 bpp */
1116 sensor->pixel_rate = sensor->link_freq[0] * 2;
1117 do_div(sensor->pixel_rate, 10);
1118
1119 /* Verify bus cfg */
1120 if (bus_cfg.bus.mipi_csi2.num_data_lanes != 1) {
1121 ret = dev_err_probe(dev, err: -EINVAL,
1122 fmt: "only a 1-lane CSI2 config is supported");
1123 goto out_free_bus_cfg;
1124 }
1125
1126 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1127 if (bus_cfg.link_frequencies[i] == sensor->link_freq[0])
1128 break;
1129
1130 if (bus_cfg.nr_of_link_frequencies == 0 ||
1131 bus_cfg.nr_of_link_frequencies == i) {
1132 ret = dev_err_probe(dev, err: -EINVAL,
1133 fmt: "supported link freq %lld not found\n",
1134 sensor->link_freq[0]);
1135 goto out_free_bus_cfg;
1136 }
1137
1138out_free_bus_cfg:
1139 v4l2_fwnode_endpoint_free(vep: &bus_cfg);
1140 return ret;
1141}
1142
1143static int ov2680_probe(struct i2c_client *client)
1144{
1145 struct device *dev = &client->dev;
1146 struct ov2680_dev *sensor;
1147 int ret;
1148
1149 sensor = devm_kzalloc(dev, size: sizeof(*sensor), GFP_KERNEL);
1150 if (!sensor)
1151 return -ENOMEM;
1152
1153 sensor->dev = &client->dev;
1154
1155 sensor->regmap = devm_cci_regmap_init_i2c(client, reg_addr_bits: 16);
1156 if (IS_ERR(ptr: sensor->regmap))
1157 return PTR_ERR(ptr: sensor->regmap);
1158
1159 ret = ov2680_parse_dt(sensor);
1160 if (ret < 0)
1161 return ret;
1162
1163 ret = ov2680_mode_init(sensor);
1164 if (ret < 0)
1165 return ret;
1166
1167 ret = ov2680_get_regulators(sensor);
1168 if (ret < 0) {
1169 dev_err(dev, "failed to get regulators\n");
1170 return ret;
1171 }
1172
1173 mutex_init(&sensor->lock);
1174
1175 /*
1176 * Power up and verify the chip now, so that if runtime pm is
1177 * disabled the chip is left on and streaming will work.
1178 */
1179 ret = ov2680_power_on(sensor);
1180 if (ret < 0)
1181 goto lock_destroy;
1182
1183 ret = ov2680_check_id(sensor);
1184 if (ret < 0)
1185 goto err_powerdown;
1186
1187 pm_runtime_set_active(dev: &client->dev);
1188 pm_runtime_get_noresume(dev: &client->dev);
1189 pm_runtime_enable(dev: &client->dev);
1190
1191 ret = ov2680_v4l2_register(sensor);
1192 if (ret < 0)
1193 goto err_pm_runtime;
1194
1195 pm_runtime_set_autosuspend_delay(dev: &client->dev, delay: 1000);
1196 pm_runtime_use_autosuspend(dev: &client->dev);
1197 pm_runtime_put_autosuspend(dev: &client->dev);
1198
1199 return 0;
1200
1201err_pm_runtime:
1202 pm_runtime_disable(dev: &client->dev);
1203 pm_runtime_put_noidle(dev: &client->dev);
1204err_powerdown:
1205 ov2680_power_off(sensor);
1206lock_destroy:
1207 dev_err(dev, "ov2680 init fail: %d\n", ret);
1208 mutex_destroy(lock: &sensor->lock);
1209
1210 return ret;
1211}
1212
1213static void ov2680_remove(struct i2c_client *client)
1214{
1215 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1216 struct ov2680_dev *sensor = to_ov2680_dev(sd);
1217
1218 v4l2_async_unregister_subdev(sd: &sensor->sd);
1219 mutex_destroy(lock: &sensor->lock);
1220 media_entity_cleanup(entity: &sensor->sd.entity);
1221 v4l2_ctrl_handler_free(hdl: &sensor->ctrls.handler);
1222
1223 /*
1224 * Disable runtime PM. In case runtime PM is disabled in the kernel,
1225 * make sure to turn power off manually.
1226 */
1227 pm_runtime_disable(dev: &client->dev);
1228 if (!pm_runtime_status_suspended(dev: &client->dev))
1229 ov2680_power_off(sensor);
1230 pm_runtime_set_suspended(dev: &client->dev);
1231}
1232
1233static int ov2680_suspend(struct device *dev)
1234{
1235 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1236 struct ov2680_dev *sensor = to_ov2680_dev(sd);
1237
1238 if (sensor->is_streaming)
1239 ov2680_stream_disable(sensor);
1240
1241 return ov2680_power_off(sensor);
1242}
1243
1244static int ov2680_resume(struct device *dev)
1245{
1246 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1247 struct ov2680_dev *sensor = to_ov2680_dev(sd);
1248 int ret;
1249
1250 ret = ov2680_power_on(sensor);
1251 if (ret < 0)
1252 goto stream_disable;
1253
1254 if (sensor->is_streaming) {
1255 ret = ov2680_stream_enable(sensor);
1256 if (ret < 0)
1257 goto stream_disable;
1258 }
1259
1260 return 0;
1261
1262stream_disable:
1263 ov2680_stream_disable(sensor);
1264 sensor->is_streaming = false;
1265
1266 return ret;
1267}
1268
1269static DEFINE_RUNTIME_DEV_PM_OPS(ov2680_pm_ops, ov2680_suspend, ov2680_resume,
1270 NULL);
1271
1272static const struct of_device_id ov2680_dt_ids[] = {
1273 { .compatible = "ovti,ov2680" },
1274 { /* sentinel */ },
1275};
1276MODULE_DEVICE_TABLE(of, ov2680_dt_ids);
1277
1278static const struct acpi_device_id ov2680_acpi_ids[] = {
1279 { "OVTI2680" },
1280 { /* sentinel */ }
1281};
1282MODULE_DEVICE_TABLE(acpi, ov2680_acpi_ids);
1283
1284static struct i2c_driver ov2680_i2c_driver = {
1285 .driver = {
1286 .name = "ov2680",
1287 .pm = pm_sleep_ptr(&ov2680_pm_ops),
1288 .of_match_table = ov2680_dt_ids,
1289 .acpi_match_table = ov2680_acpi_ids,
1290 },
1291 .probe = ov2680_probe,
1292 .remove = ov2680_remove,
1293};
1294module_i2c_driver(ov2680_i2c_driver);
1295
1296MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>");
1297MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver");
1298MODULE_LICENSE("GPL v2");
1299

source code of linux/drivers/media/i2c/ov2680.c