1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * A V4L2 driver for OmniVision OV5647 cameras.
4 *
5 * Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver
6 * Copyright (C) 2011 Sylwester Nawrocki <s.nawrocki@samsung.com>
7 *
8 * Based on Omnivision OV7670 Camera Driver
9 * Copyright (C) 2006-7 Jonathan Corbet <corbet@lwn.net>
10 *
11 * Copyright (C) 2016, Synopsys, Inc.
12 */
13
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/gpio/consumer.h>
17 #include <linux/i2c.h>
18 #include <linux/init.h>
19 #include <linux/io.h>
20 #include <linux/module.h>
21 #include <linux/of_graph.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/slab.h>
24 #include <linux/videodev2.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-fwnode.h>
29 #include <media/v4l2-image-sizes.h>
30 #include <media/v4l2-mediabus.h>
31
32 /*
33 * From the datasheet, "20ms after PWDN goes low or 20ms after RESETB goes
34 * high if reset is inserted after PWDN goes high, host can access sensor's
35 * SCCB to initialize sensor."
36 */
37 #define PWDN_ACTIVE_DELAY_MS 20
38
39 #define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5)
40 #define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4)
41 #define MIPI_CTRL00_BUS_IDLE BIT(2)
42 #define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0)
43
44 #define OV5647_SW_STANDBY 0x0100
45 #define OV5647_SW_RESET 0x0103
46 #define OV5647_REG_CHIPID_H 0x300a
47 #define OV5647_REG_CHIPID_L 0x300b
48 #define OV5640_REG_PAD_OUT 0x300d
49 #define OV5647_REG_EXP_HI 0x3500
50 #define OV5647_REG_EXP_MID 0x3501
51 #define OV5647_REG_EXP_LO 0x3502
52 #define OV5647_REG_AEC_AGC 0x3503
53 #define OV5647_REG_GAIN_HI 0x350a
54 #define OV5647_REG_GAIN_LO 0x350b
55 #define OV5647_REG_VTS_HI 0x380e
56 #define OV5647_REG_VTS_LO 0x380f
57 #define OV5647_REG_FRAME_OFF_NUMBER 0x4202
58 #define OV5647_REG_MIPI_CTRL00 0x4800
59 #define OV5647_REG_MIPI_CTRL14 0x4814
60 #define OV5647_REG_AWB 0x5001
61 #define OV5647_REG_ISPCTRL3D 0x503d
62
63 #define REG_TERM 0xfffe
64 #define VAL_TERM 0xfe
65 #define REG_DLY 0xffff
66
67 /* OV5647 native and active pixel array size */
68 #define OV5647_NATIVE_WIDTH 2624U
69 #define OV5647_NATIVE_HEIGHT 1956U
70
71 #define OV5647_PIXEL_ARRAY_LEFT 16U
72 #define OV5647_PIXEL_ARRAY_TOP 16U
73 #define OV5647_PIXEL_ARRAY_WIDTH 2592U
74 #define OV5647_PIXEL_ARRAY_HEIGHT 1944U
75
76 #define OV5647_VBLANK_MIN 4
77 #define OV5647_VTS_MAX 32767
78
79 #define OV5647_EXPOSURE_MIN 4
80 #define OV5647_EXPOSURE_STEP 1
81 #define OV5647_EXPOSURE_DEFAULT 1000
82 #define OV5647_EXPOSURE_MAX 65535
83
84 struct regval_list {
85 u16 addr;
86 u8 data;
87 };
88
89 struct ov5647_mode {
90 struct v4l2_mbus_framefmt format;
91 struct v4l2_rect crop;
92 u64 pixel_rate;
93 int hts;
94 int vts;
95 const struct regval_list *reg_list;
96 unsigned int num_regs;
97 };
98
99 struct ov5647 {
100 struct v4l2_subdev sd;
101 struct media_pad pad;
102 struct mutex lock;
103 struct clk *xclk;
104 struct gpio_desc *pwdn;
105 bool clock_ncont;
106 struct v4l2_ctrl_handler ctrls;
107 const struct ov5647_mode *mode;
108 struct v4l2_ctrl *pixel_rate;
109 struct v4l2_ctrl *hblank;
110 struct v4l2_ctrl *vblank;
111 struct v4l2_ctrl *exposure;
112 bool streaming;
113 };
114
to_sensor(struct v4l2_subdev * sd)115 static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd)
116 {
117 return container_of(sd, struct ov5647, sd);
118 }
119
120 static const char * const ov5647_test_pattern_menu[] = {
121 "Disabled",
122 "Color Bars",
123 "Color Squares",
124 "Random Data",
125 };
126
127 static const u8 ov5647_test_pattern_val[] = {
128 0x00, /* Disabled */
129 0x80, /* Color Bars */
130 0x82, /* Color Squares */
131 0x81, /* Random Data */
132 };
133
134 static const struct regval_list sensor_oe_disable_regs[] = {
135 {0x3000, 0x00},
136 {0x3001, 0x00},
137 {0x3002, 0x00},
138 };
139
140 static const struct regval_list sensor_oe_enable_regs[] = {
141 {0x3000, 0x0f},
142 {0x3001, 0xff},
143 {0x3002, 0xe4},
144 };
145
146 static struct regval_list ov5647_2592x1944_10bpp[] = {
147 {0x0100, 0x00},
148 {0x0103, 0x01},
149 {0x3034, 0x1a},
150 {0x3035, 0x21},
151 {0x3036, 0x69},
152 {0x303c, 0x11},
153 {0x3106, 0xf5},
154 {0x3821, 0x06},
155 {0x3820, 0x00},
156 {0x3827, 0xec},
157 {0x370c, 0x03},
158 {0x3612, 0x5b},
159 {0x3618, 0x04},
160 {0x5000, 0x06},
161 {0x5002, 0x41},
162 {0x5003, 0x08},
163 {0x5a00, 0x08},
164 {0x3000, 0x00},
165 {0x3001, 0x00},
166 {0x3002, 0x00},
167 {0x3016, 0x08},
168 {0x3017, 0xe0},
169 {0x3018, 0x44},
170 {0x301c, 0xf8},
171 {0x301d, 0xf0},
172 {0x3a18, 0x00},
173 {0x3a19, 0xf8},
174 {0x3c01, 0x80},
175 {0x3b07, 0x0c},
176 {0x380c, 0x0b},
177 {0x380d, 0x1c},
178 {0x3814, 0x11},
179 {0x3815, 0x11},
180 {0x3708, 0x64},
181 {0x3709, 0x12},
182 {0x3808, 0x0a},
183 {0x3809, 0x20},
184 {0x380a, 0x07},
185 {0x380b, 0x98},
186 {0x3800, 0x00},
187 {0x3801, 0x00},
188 {0x3802, 0x00},
189 {0x3803, 0x00},
190 {0x3804, 0x0a},
191 {0x3805, 0x3f},
192 {0x3806, 0x07},
193 {0x3807, 0xa3},
194 {0x3811, 0x10},
195 {0x3813, 0x06},
196 {0x3630, 0x2e},
197 {0x3632, 0xe2},
198 {0x3633, 0x23},
199 {0x3634, 0x44},
200 {0x3636, 0x06},
201 {0x3620, 0x64},
202 {0x3621, 0xe0},
203 {0x3600, 0x37},
204 {0x3704, 0xa0},
205 {0x3703, 0x5a},
206 {0x3715, 0x78},
207 {0x3717, 0x01},
208 {0x3731, 0x02},
209 {0x370b, 0x60},
210 {0x3705, 0x1a},
211 {0x3f05, 0x02},
212 {0x3f06, 0x10},
213 {0x3f01, 0x0a},
214 {0x3a08, 0x01},
215 {0x3a09, 0x28},
216 {0x3a0a, 0x00},
217 {0x3a0b, 0xf6},
218 {0x3a0d, 0x08},
219 {0x3a0e, 0x06},
220 {0x3a0f, 0x58},
221 {0x3a10, 0x50},
222 {0x3a1b, 0x58},
223 {0x3a1e, 0x50},
224 {0x3a11, 0x60},
225 {0x3a1f, 0x28},
226 {0x4001, 0x02},
227 {0x4004, 0x04},
228 {0x4000, 0x09},
229 {0x4837, 0x19},
230 {0x4800, 0x24},
231 {0x3503, 0x03},
232 {0x0100, 0x01},
233 };
234
235 static struct regval_list ov5647_1080p30_10bpp[] = {
236 {0x0100, 0x00},
237 {0x0103, 0x01},
238 {0x3034, 0x1a},
239 {0x3035, 0x21},
240 {0x3036, 0x62},
241 {0x303c, 0x11},
242 {0x3106, 0xf5},
243 {0x3821, 0x06},
244 {0x3820, 0x00},
245 {0x3827, 0xec},
246 {0x370c, 0x03},
247 {0x3612, 0x5b},
248 {0x3618, 0x04},
249 {0x5000, 0x06},
250 {0x5002, 0x41},
251 {0x5003, 0x08},
252 {0x5a00, 0x08},
253 {0x3000, 0x00},
254 {0x3001, 0x00},
255 {0x3002, 0x00},
256 {0x3016, 0x08},
257 {0x3017, 0xe0},
258 {0x3018, 0x44},
259 {0x301c, 0xf8},
260 {0x301d, 0xf0},
261 {0x3a18, 0x00},
262 {0x3a19, 0xf8},
263 {0x3c01, 0x80},
264 {0x3b07, 0x0c},
265 {0x380c, 0x09},
266 {0x380d, 0x70},
267 {0x3814, 0x11},
268 {0x3815, 0x11},
269 {0x3708, 0x64},
270 {0x3709, 0x12},
271 {0x3808, 0x07},
272 {0x3809, 0x80},
273 {0x380a, 0x04},
274 {0x380b, 0x38},
275 {0x3800, 0x01},
276 {0x3801, 0x5c},
277 {0x3802, 0x01},
278 {0x3803, 0xb2},
279 {0x3804, 0x08},
280 {0x3805, 0xe3},
281 {0x3806, 0x05},
282 {0x3807, 0xf1},
283 {0x3811, 0x04},
284 {0x3813, 0x02},
285 {0x3630, 0x2e},
286 {0x3632, 0xe2},
287 {0x3633, 0x23},
288 {0x3634, 0x44},
289 {0x3636, 0x06},
290 {0x3620, 0x64},
291 {0x3621, 0xe0},
292 {0x3600, 0x37},
293 {0x3704, 0xa0},
294 {0x3703, 0x5a},
295 {0x3715, 0x78},
296 {0x3717, 0x01},
297 {0x3731, 0x02},
298 {0x370b, 0x60},
299 {0x3705, 0x1a},
300 {0x3f05, 0x02},
301 {0x3f06, 0x10},
302 {0x3f01, 0x0a},
303 {0x3a08, 0x01},
304 {0x3a09, 0x4b},
305 {0x3a0a, 0x01},
306 {0x3a0b, 0x13},
307 {0x3a0d, 0x04},
308 {0x3a0e, 0x03},
309 {0x3a0f, 0x58},
310 {0x3a10, 0x50},
311 {0x3a1b, 0x58},
312 {0x3a1e, 0x50},
313 {0x3a11, 0x60},
314 {0x3a1f, 0x28},
315 {0x4001, 0x02},
316 {0x4004, 0x04},
317 {0x4000, 0x09},
318 {0x4837, 0x19},
319 {0x4800, 0x34},
320 {0x3503, 0x03},
321 {0x0100, 0x01},
322 };
323
324 static struct regval_list ov5647_2x2binned_10bpp[] = {
325 {0x0100, 0x00},
326 {0x0103, 0x01},
327 {0x3034, 0x1a},
328 {0x3035, 0x21},
329 {0x3036, 0x62},
330 {0x303c, 0x11},
331 {0x3106, 0xf5},
332 {0x3827, 0xec},
333 {0x370c, 0x03},
334 {0x3612, 0x59},
335 {0x3618, 0x00},
336 {0x5000, 0x06},
337 {0x5002, 0x41},
338 {0x5003, 0x08},
339 {0x5a00, 0x08},
340 {0x3000, 0x00},
341 {0x3001, 0x00},
342 {0x3002, 0x00},
343 {0x3016, 0x08},
344 {0x3017, 0xe0},
345 {0x3018, 0x44},
346 {0x301c, 0xf8},
347 {0x301d, 0xf0},
348 {0x3a18, 0x00},
349 {0x3a19, 0xf8},
350 {0x3c01, 0x80},
351 {0x3b07, 0x0c},
352 {0x3800, 0x00},
353 {0x3801, 0x00},
354 {0x3802, 0x00},
355 {0x3803, 0x00},
356 {0x3804, 0x0a},
357 {0x3805, 0x3f},
358 {0x3806, 0x07},
359 {0x3807, 0xa3},
360 {0x3808, 0x05},
361 {0x3809, 0x10},
362 {0x380a, 0x03},
363 {0x380b, 0xcc},
364 {0x380c, 0x07},
365 {0x380d, 0x68},
366 {0x3811, 0x0c},
367 {0x3813, 0x06},
368 {0x3814, 0x31},
369 {0x3815, 0x31},
370 {0x3630, 0x2e},
371 {0x3632, 0xe2},
372 {0x3633, 0x23},
373 {0x3634, 0x44},
374 {0x3636, 0x06},
375 {0x3620, 0x64},
376 {0x3621, 0xe0},
377 {0x3600, 0x37},
378 {0x3704, 0xa0},
379 {0x3703, 0x5a},
380 {0x3715, 0x78},
381 {0x3717, 0x01},
382 {0x3731, 0x02},
383 {0x370b, 0x60},
384 {0x3705, 0x1a},
385 {0x3f05, 0x02},
386 {0x3f06, 0x10},
387 {0x3f01, 0x0a},
388 {0x3a08, 0x01},
389 {0x3a09, 0x28},
390 {0x3a0a, 0x00},
391 {0x3a0b, 0xf6},
392 {0x3a0d, 0x08},
393 {0x3a0e, 0x06},
394 {0x3a0f, 0x58},
395 {0x3a10, 0x50},
396 {0x3a1b, 0x58},
397 {0x3a1e, 0x50},
398 {0x3a11, 0x60},
399 {0x3a1f, 0x28},
400 {0x4001, 0x02},
401 {0x4004, 0x04},
402 {0x4000, 0x09},
403 {0x4837, 0x16},
404 {0x4800, 0x24},
405 {0x3503, 0x03},
406 {0x3820, 0x41},
407 {0x3821, 0x07},
408 {0x350a, 0x00},
409 {0x350b, 0x10},
410 {0x3500, 0x00},
411 {0x3501, 0x1a},
412 {0x3502, 0xf0},
413 {0x3212, 0xa0},
414 {0x0100, 0x01},
415 };
416
417 static struct regval_list ov5647_640x480_10bpp[] = {
418 {0x0100, 0x00},
419 {0x0103, 0x01},
420 {0x3035, 0x11},
421 {0x3036, 0x46},
422 {0x303c, 0x11},
423 {0x3821, 0x07},
424 {0x3820, 0x41},
425 {0x370c, 0x03},
426 {0x3612, 0x59},
427 {0x3618, 0x00},
428 {0x5000, 0x06},
429 {0x5003, 0x08},
430 {0x5a00, 0x08},
431 {0x3000, 0xff},
432 {0x3001, 0xff},
433 {0x3002, 0xff},
434 {0x301d, 0xf0},
435 {0x3a18, 0x00},
436 {0x3a19, 0xf8},
437 {0x3c01, 0x80},
438 {0x3b07, 0x0c},
439 {0x380c, 0x07},
440 {0x380d, 0x3c},
441 {0x3814, 0x35},
442 {0x3815, 0x35},
443 {0x3708, 0x64},
444 {0x3709, 0x52},
445 {0x3808, 0x02},
446 {0x3809, 0x80},
447 {0x380a, 0x01},
448 {0x380b, 0xe0},
449 {0x3800, 0x00},
450 {0x3801, 0x10},
451 {0x3802, 0x00},
452 {0x3803, 0x00},
453 {0x3804, 0x0a},
454 {0x3805, 0x2f},
455 {0x3806, 0x07},
456 {0x3807, 0x9f},
457 {0x3630, 0x2e},
458 {0x3632, 0xe2},
459 {0x3633, 0x23},
460 {0x3634, 0x44},
461 {0x3620, 0x64},
462 {0x3621, 0xe0},
463 {0x3600, 0x37},
464 {0x3704, 0xa0},
465 {0x3703, 0x5a},
466 {0x3715, 0x78},
467 {0x3717, 0x01},
468 {0x3731, 0x02},
469 {0x370b, 0x60},
470 {0x3705, 0x1a},
471 {0x3f05, 0x02},
472 {0x3f06, 0x10},
473 {0x3f01, 0x0a},
474 {0x3a08, 0x01},
475 {0x3a09, 0x2e},
476 {0x3a0a, 0x00},
477 {0x3a0b, 0xfb},
478 {0x3a0d, 0x02},
479 {0x3a0e, 0x01},
480 {0x3a0f, 0x58},
481 {0x3a10, 0x50},
482 {0x3a1b, 0x58},
483 {0x3a1e, 0x50},
484 {0x3a11, 0x60},
485 {0x3a1f, 0x28},
486 {0x4001, 0x02},
487 {0x4004, 0x02},
488 {0x4000, 0x09},
489 {0x3000, 0x00},
490 {0x3001, 0x00},
491 {0x3002, 0x00},
492 {0x3017, 0xe0},
493 {0x301c, 0xfc},
494 {0x3636, 0x06},
495 {0x3016, 0x08},
496 {0x3827, 0xec},
497 {0x3018, 0x44},
498 {0x3035, 0x21},
499 {0x3106, 0xf5},
500 {0x3034, 0x1a},
501 {0x301c, 0xf8},
502 {0x4800, 0x34},
503 {0x3503, 0x03},
504 {0x0100, 0x01},
505 };
506
507 static const struct ov5647_mode ov5647_modes[] = {
508 /* 2592x1944 full resolution full FOV 10-bit mode. */
509 {
510 .format = {
511 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
512 .colorspace = V4L2_COLORSPACE_SRGB,
513 .field = V4L2_FIELD_NONE,
514 .width = 2592,
515 .height = 1944
516 },
517 .crop = {
518 .left = OV5647_PIXEL_ARRAY_LEFT,
519 .top = OV5647_PIXEL_ARRAY_TOP,
520 .width = 2592,
521 .height = 1944
522 },
523 .pixel_rate = 87500000,
524 .hts = 2844,
525 .vts = 0x7b0,
526 .reg_list = ov5647_2592x1944_10bpp,
527 .num_regs = ARRAY_SIZE(ov5647_2592x1944_10bpp)
528 },
529 /* 1080p30 10-bit mode. Full resolution centre-cropped down to 1080p. */
530 {
531 .format = {
532 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
533 .colorspace = V4L2_COLORSPACE_SRGB,
534 .field = V4L2_FIELD_NONE,
535 .width = 1920,
536 .height = 1080
537 },
538 .crop = {
539 .left = 348 + OV5647_PIXEL_ARRAY_LEFT,
540 .top = 434 + OV5647_PIXEL_ARRAY_TOP,
541 .width = 1928,
542 .height = 1080,
543 },
544 .pixel_rate = 81666700,
545 .hts = 2416,
546 .vts = 0x450,
547 .reg_list = ov5647_1080p30_10bpp,
548 .num_regs = ARRAY_SIZE(ov5647_1080p30_10bpp)
549 },
550 /* 2x2 binned full FOV 10-bit mode. */
551 {
552 .format = {
553 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
554 .colorspace = V4L2_COLORSPACE_SRGB,
555 .field = V4L2_FIELD_NONE,
556 .width = 1296,
557 .height = 972
558 },
559 .crop = {
560 .left = OV5647_PIXEL_ARRAY_LEFT,
561 .top = OV5647_PIXEL_ARRAY_TOP,
562 .width = 2592,
563 .height = 1944,
564 },
565 .pixel_rate = 81666700,
566 .hts = 1896,
567 .vts = 0x59b,
568 .reg_list = ov5647_2x2binned_10bpp,
569 .num_regs = ARRAY_SIZE(ov5647_2x2binned_10bpp)
570 },
571 /* 10-bit VGA full FOV 60fps. 2x2 binned and subsampled down to VGA. */
572 {
573 .format = {
574 .code = MEDIA_BUS_FMT_SBGGR10_1X10,
575 .colorspace = V4L2_COLORSPACE_SRGB,
576 .field = V4L2_FIELD_NONE,
577 .width = 640,
578 .height = 480
579 },
580 .crop = {
581 .left = 16 + OV5647_PIXEL_ARRAY_LEFT,
582 .top = OV5647_PIXEL_ARRAY_TOP,
583 .width = 2560,
584 .height = 1920,
585 },
586 .pixel_rate = 55000000,
587 .hts = 1852,
588 .vts = 0x1f8,
589 .reg_list = ov5647_640x480_10bpp,
590 .num_regs = ARRAY_SIZE(ov5647_640x480_10bpp)
591 },
592 };
593
594 /* Default sensor mode is 2x2 binned 640x480 SBGGR10_1X10. */
595 #define OV5647_DEFAULT_MODE (&ov5647_modes[3])
596 #define OV5647_DEFAULT_FORMAT (ov5647_modes[3].format)
597
ov5647_write16(struct v4l2_subdev * sd,u16 reg,u16 val)598 static int ov5647_write16(struct v4l2_subdev *sd, u16 reg, u16 val)
599 {
600 unsigned char data[4] = { reg >> 8, reg & 0xff, val >> 8, val & 0xff};
601 struct i2c_client *client = v4l2_get_subdevdata(sd);
602 int ret;
603
604 ret = i2c_master_send(client, data, 4);
605 if (ret < 0) {
606 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
607 __func__, reg);
608 return ret;
609 }
610
611 return 0;
612 }
613
ov5647_write(struct v4l2_subdev * sd,u16 reg,u8 val)614 static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
615 {
616 unsigned char data[3] = { reg >> 8, reg & 0xff, val};
617 struct i2c_client *client = v4l2_get_subdevdata(sd);
618 int ret;
619
620 ret = i2c_master_send(client, data, 3);
621 if (ret < 0) {
622 dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
623 __func__, reg);
624 return ret;
625 }
626
627 return 0;
628 }
629
ov5647_read(struct v4l2_subdev * sd,u16 reg,u8 * val)630 static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
631 {
632 struct i2c_client *client = v4l2_get_subdevdata(sd);
633 u8 buf[2] = { reg >> 8, reg & 0xff };
634 struct i2c_msg msg[2];
635 int ret;
636
637 msg[0].addr = client->addr;
638 msg[0].flags = client->flags;
639 msg[0].buf = buf;
640 msg[0].len = sizeof(buf);
641
642 msg[1].addr = client->addr;
643 msg[1].flags = client->flags | I2C_M_RD;
644 msg[1].buf = buf;
645 msg[1].len = 1;
646
647 ret = i2c_transfer(client->adapter, msg, 2);
648 if (ret != 2) {
649 dev_err(&client->dev, "%s: i2c read error, reg: %x = %d\n",
650 __func__, reg, ret);
651 return ret >= 0 ? -EINVAL : ret;
652 }
653
654 *val = buf[0];
655
656 return 0;
657 }
658
ov5647_write_array(struct v4l2_subdev * sd,const struct regval_list * regs,int array_size)659 static int ov5647_write_array(struct v4l2_subdev *sd,
660 const struct regval_list *regs, int array_size)
661 {
662 int i, ret;
663
664 for (i = 0; i < array_size; i++) {
665 ret = ov5647_write(sd, regs[i].addr, regs[i].data);
666 if (ret < 0)
667 return ret;
668 }
669
670 return 0;
671 }
672
ov5647_set_virtual_channel(struct v4l2_subdev * sd,int channel)673 static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
674 {
675 u8 channel_id;
676 int ret;
677
678 ret = ov5647_read(sd, OV5647_REG_MIPI_CTRL14, &channel_id);
679 if (ret < 0)
680 return ret;
681
682 channel_id &= ~(3 << 6);
683
684 return ov5647_write(sd, OV5647_REG_MIPI_CTRL14,
685 channel_id | (channel << 6));
686 }
687
ov5647_set_mode(struct v4l2_subdev * sd)688 static int ov5647_set_mode(struct v4l2_subdev *sd)
689 {
690 struct i2c_client *client = v4l2_get_subdevdata(sd);
691 struct ov5647 *sensor = to_sensor(sd);
692 u8 resetval, rdval;
693 int ret;
694
695 ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
696 if (ret < 0)
697 return ret;
698
699 ret = ov5647_write_array(sd, sensor->mode->reg_list,
700 sensor->mode->num_regs);
701 if (ret < 0) {
702 dev_err(&client->dev, "write sensor default regs error\n");
703 return ret;
704 }
705
706 ret = ov5647_set_virtual_channel(sd, 0);
707 if (ret < 0)
708 return ret;
709
710 ret = ov5647_read(sd, OV5647_SW_STANDBY, &resetval);
711 if (ret < 0)
712 return ret;
713
714 if (!(resetval & 0x01)) {
715 dev_err(&client->dev, "Device was in SW standby");
716 ret = ov5647_write(sd, OV5647_SW_STANDBY, 0x01);
717 if (ret < 0)
718 return ret;
719 }
720
721 return 0;
722 }
723
ov5647_stream_on(struct v4l2_subdev * sd)724 static int ov5647_stream_on(struct v4l2_subdev *sd)
725 {
726 struct i2c_client *client = v4l2_get_subdevdata(sd);
727 struct ov5647 *sensor = to_sensor(sd);
728 u8 val = MIPI_CTRL00_BUS_IDLE;
729 int ret;
730
731 ret = ov5647_set_mode(sd);
732 if (ret) {
733 dev_err(&client->dev, "Failed to program sensor mode: %d\n", ret);
734 return ret;
735 }
736
737 /* Apply customized values from user when stream starts. */
738 ret = __v4l2_ctrl_handler_setup(sd->ctrl_handler);
739 if (ret)
740 return ret;
741
742 if (sensor->clock_ncont)
743 val |= MIPI_CTRL00_CLOCK_LANE_GATE |
744 MIPI_CTRL00_LINE_SYNC_ENABLE;
745
746 ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
747 if (ret < 0)
748 return ret;
749
750 ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x00);
751 if (ret < 0)
752 return ret;
753
754 return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x00);
755 }
756
ov5647_stream_off(struct v4l2_subdev * sd)757 static int ov5647_stream_off(struct v4l2_subdev *sd)
758 {
759 int ret;
760
761 ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00,
762 MIPI_CTRL00_CLOCK_LANE_GATE | MIPI_CTRL00_BUS_IDLE |
763 MIPI_CTRL00_CLOCK_LANE_DISABLE);
764 if (ret < 0)
765 return ret;
766
767 ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x0f);
768 if (ret < 0)
769 return ret;
770
771 return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01);
772 }
773
ov5647_power_on(struct device * dev)774 static int ov5647_power_on(struct device *dev)
775 {
776 struct ov5647 *sensor = dev_get_drvdata(dev);
777 int ret;
778
779 dev_dbg(dev, "OV5647 power on\n");
780
781 if (sensor->pwdn) {
782 gpiod_set_value_cansleep(sensor->pwdn, 0);
783 msleep(PWDN_ACTIVE_DELAY_MS);
784 }
785
786 ret = clk_prepare_enable(sensor->xclk);
787 if (ret < 0) {
788 dev_err(dev, "clk prepare enable failed\n");
789 goto error_pwdn;
790 }
791
792 ret = ov5647_write_array(&sensor->sd, sensor_oe_enable_regs,
793 ARRAY_SIZE(sensor_oe_enable_regs));
794 if (ret < 0) {
795 dev_err(dev, "write sensor_oe_enable_regs error\n");
796 goto error_clk_disable;
797 }
798
799 /* Stream off to coax lanes into LP-11 state. */
800 ret = ov5647_stream_off(&sensor->sd);
801 if (ret < 0) {
802 dev_err(dev, "camera not available, check power\n");
803 goto error_clk_disable;
804 }
805
806 return 0;
807
808 error_clk_disable:
809 clk_disable_unprepare(sensor->xclk);
810 error_pwdn:
811 gpiod_set_value_cansleep(sensor->pwdn, 1);
812
813 return ret;
814 }
815
ov5647_power_off(struct device * dev)816 static int ov5647_power_off(struct device *dev)
817 {
818 struct ov5647 *sensor = dev_get_drvdata(dev);
819 u8 rdval;
820 int ret;
821
822 dev_dbg(dev, "OV5647 power off\n");
823
824 ret = ov5647_write_array(&sensor->sd, sensor_oe_disable_regs,
825 ARRAY_SIZE(sensor_oe_disable_regs));
826 if (ret < 0)
827 dev_dbg(dev, "disable oe failed\n");
828
829 /* Enter software standby */
830 ret = ov5647_read(&sensor->sd, OV5647_SW_STANDBY, &rdval);
831 if (ret < 0)
832 dev_dbg(dev, "software standby failed\n");
833
834 rdval &= ~0x01;
835 ret = ov5647_write(&sensor->sd, OV5647_SW_STANDBY, rdval);
836 if (ret < 0)
837 dev_dbg(dev, "software standby failed\n");
838
839 clk_disable_unprepare(sensor->xclk);
840 gpiod_set_value_cansleep(sensor->pwdn, 1);
841
842 return 0;
843 }
844
845 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov5647_sensor_get_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)846 static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
847 struct v4l2_dbg_register *reg)
848 {
849 int ret;
850 u8 val;
851
852 ret = ov5647_read(sd, reg->reg & 0xff, &val);
853 if (ret < 0)
854 return ret;
855
856 reg->val = val;
857 reg->size = 1;
858
859 return 0;
860 }
861
ov5647_sensor_set_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)862 static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
863 const struct v4l2_dbg_register *reg)
864 {
865 return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
866 }
867 #endif
868
869 /* Subdev core operations registration */
870 static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
871 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
872 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
873 #ifdef CONFIG_VIDEO_ADV_DEBUG
874 .g_register = ov5647_sensor_get_register,
875 .s_register = ov5647_sensor_set_register,
876 #endif
877 };
878
879 static const struct v4l2_rect *
__ov5647_get_pad_crop(struct ov5647 * ov5647,struct v4l2_subdev_state * sd_state,unsigned int pad,enum v4l2_subdev_format_whence which)880 __ov5647_get_pad_crop(struct ov5647 *ov5647,
881 struct v4l2_subdev_state *sd_state,
882 unsigned int pad, enum v4l2_subdev_format_whence which)
883 {
884 switch (which) {
885 case V4L2_SUBDEV_FORMAT_TRY:
886 return v4l2_subdev_get_try_crop(&ov5647->sd, sd_state, pad);
887 case V4L2_SUBDEV_FORMAT_ACTIVE:
888 return &ov5647->mode->crop;
889 }
890
891 return NULL;
892 }
893
ov5647_s_stream(struct v4l2_subdev * sd,int enable)894 static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
895 {
896 struct i2c_client *client = v4l2_get_subdevdata(sd);
897 struct ov5647 *sensor = to_sensor(sd);
898 int ret;
899
900 mutex_lock(&sensor->lock);
901 if (sensor->streaming == enable) {
902 mutex_unlock(&sensor->lock);
903 return 0;
904 }
905
906 if (enable) {
907 ret = pm_runtime_resume_and_get(&client->dev);
908 if (ret < 0)
909 goto error_unlock;
910
911 ret = ov5647_stream_on(sd);
912 if (ret < 0) {
913 dev_err(&client->dev, "stream start failed: %d\n", ret);
914 goto error_pm;
915 }
916 } else {
917 ret = ov5647_stream_off(sd);
918 if (ret < 0) {
919 dev_err(&client->dev, "stream stop failed: %d\n", ret);
920 goto error_pm;
921 }
922 pm_runtime_put(&client->dev);
923 }
924
925 sensor->streaming = enable;
926 mutex_unlock(&sensor->lock);
927
928 return 0;
929
930 error_pm:
931 pm_runtime_put(&client->dev);
932 error_unlock:
933 mutex_unlock(&sensor->lock);
934
935 return ret;
936 }
937
938 static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
939 .s_stream = ov5647_s_stream,
940 };
941
ov5647_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)942 static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
943 struct v4l2_subdev_state *sd_state,
944 struct v4l2_subdev_mbus_code_enum *code)
945 {
946 if (code->index > 0)
947 return -EINVAL;
948
949 code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
950
951 return 0;
952 }
953
ov5647_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)954 static int ov5647_enum_frame_size(struct v4l2_subdev *sd,
955 struct v4l2_subdev_state *sd_state,
956 struct v4l2_subdev_frame_size_enum *fse)
957 {
958 const struct v4l2_mbus_framefmt *fmt;
959
960 if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
961 fse->index >= ARRAY_SIZE(ov5647_modes))
962 return -EINVAL;
963
964 fmt = &ov5647_modes[fse->index].format;
965 fse->min_width = fmt->width;
966 fse->max_width = fmt->width;
967 fse->min_height = fmt->height;
968 fse->max_height = fmt->height;
969
970 return 0;
971 }
972
ov5647_get_pad_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)973 static int ov5647_get_pad_fmt(struct v4l2_subdev *sd,
974 struct v4l2_subdev_state *sd_state,
975 struct v4l2_subdev_format *format)
976 {
977 struct v4l2_mbus_framefmt *fmt = &format->format;
978 const struct v4l2_mbus_framefmt *sensor_format;
979 struct ov5647 *sensor = to_sensor(sd);
980
981 mutex_lock(&sensor->lock);
982 switch (format->which) {
983 case V4L2_SUBDEV_FORMAT_TRY:
984 sensor_format = v4l2_subdev_get_try_format(sd, sd_state,
985 format->pad);
986 break;
987 default:
988 sensor_format = &sensor->mode->format;
989 break;
990 }
991
992 *fmt = *sensor_format;
993 mutex_unlock(&sensor->lock);
994
995 return 0;
996 }
997
ov5647_set_pad_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)998 static int ov5647_set_pad_fmt(struct v4l2_subdev *sd,
999 struct v4l2_subdev_state *sd_state,
1000 struct v4l2_subdev_format *format)
1001 {
1002 struct v4l2_mbus_framefmt *fmt = &format->format;
1003 struct ov5647 *sensor = to_sensor(sd);
1004 const struct ov5647_mode *mode;
1005
1006 mode = v4l2_find_nearest_size(ov5647_modes, ARRAY_SIZE(ov5647_modes),
1007 format.width, format.height,
1008 fmt->width, fmt->height);
1009
1010 /* Update the sensor mode and apply at it at streamon time. */
1011 mutex_lock(&sensor->lock);
1012 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1013 *v4l2_subdev_get_try_format(sd, sd_state, format->pad) = mode->format;
1014 } else {
1015 int exposure_max, exposure_def;
1016 int hblank, vblank;
1017
1018 sensor->mode = mode;
1019 __v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate,
1020 mode->pixel_rate, 1, mode->pixel_rate);
1021
1022 hblank = mode->hts - mode->format.width;
1023 __v4l2_ctrl_modify_range(sensor->hblank, hblank, hblank, 1,
1024 hblank);
1025
1026 vblank = mode->vts - mode->format.height;
1027 __v4l2_ctrl_modify_range(sensor->vblank, OV5647_VBLANK_MIN,
1028 OV5647_VTS_MAX - mode->format.height,
1029 1, vblank);
1030 __v4l2_ctrl_s_ctrl(sensor->vblank, vblank);
1031
1032 exposure_max = mode->vts - 4;
1033 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1034 __v4l2_ctrl_modify_range(sensor->exposure,
1035 sensor->exposure->minimum,
1036 exposure_max, sensor->exposure->step,
1037 exposure_def);
1038 }
1039 *fmt = mode->format;
1040 mutex_unlock(&sensor->lock);
1041
1042 return 0;
1043 }
1044
ov5647_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1045 static int ov5647_get_selection(struct v4l2_subdev *sd,
1046 struct v4l2_subdev_state *sd_state,
1047 struct v4l2_subdev_selection *sel)
1048 {
1049 switch (sel->target) {
1050 case V4L2_SEL_TGT_CROP: {
1051 struct ov5647 *sensor = to_sensor(sd);
1052
1053 mutex_lock(&sensor->lock);
1054 sel->r = *__ov5647_get_pad_crop(sensor, sd_state, sel->pad,
1055 sel->which);
1056 mutex_unlock(&sensor->lock);
1057
1058 return 0;
1059 }
1060
1061 case V4L2_SEL_TGT_NATIVE_SIZE:
1062 sel->r.top = 0;
1063 sel->r.left = 0;
1064 sel->r.width = OV5647_NATIVE_WIDTH;
1065 sel->r.height = OV5647_NATIVE_HEIGHT;
1066
1067 return 0;
1068
1069 case V4L2_SEL_TGT_CROP_DEFAULT:
1070 case V4L2_SEL_TGT_CROP_BOUNDS:
1071 sel->r.top = OV5647_PIXEL_ARRAY_TOP;
1072 sel->r.left = OV5647_PIXEL_ARRAY_LEFT;
1073 sel->r.width = OV5647_PIXEL_ARRAY_WIDTH;
1074 sel->r.height = OV5647_PIXEL_ARRAY_HEIGHT;
1075
1076 return 0;
1077 }
1078
1079 return -EINVAL;
1080 }
1081
1082 static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
1083 .enum_mbus_code = ov5647_enum_mbus_code,
1084 .enum_frame_size = ov5647_enum_frame_size,
1085 .set_fmt = ov5647_set_pad_fmt,
1086 .get_fmt = ov5647_get_pad_fmt,
1087 .get_selection = ov5647_get_selection,
1088 };
1089
1090 static const struct v4l2_subdev_ops ov5647_subdev_ops = {
1091 .core = &ov5647_subdev_core_ops,
1092 .video = &ov5647_subdev_video_ops,
1093 .pad = &ov5647_subdev_pad_ops,
1094 };
1095
ov5647_detect(struct v4l2_subdev * sd)1096 static int ov5647_detect(struct v4l2_subdev *sd)
1097 {
1098 struct i2c_client *client = v4l2_get_subdevdata(sd);
1099 u8 read;
1100 int ret;
1101
1102 ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
1103 if (ret < 0)
1104 return ret;
1105
1106 ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
1107 if (ret < 0)
1108 return ret;
1109
1110 if (read != 0x56) {
1111 dev_err(&client->dev, "ID High expected 0x56 got %x", read);
1112 return -ENODEV;
1113 }
1114
1115 ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
1116 if (ret < 0)
1117 return ret;
1118
1119 if (read != 0x47) {
1120 dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
1121 return -ENODEV;
1122 }
1123
1124 return ov5647_write(sd, OV5647_SW_RESET, 0x00);
1125 }
1126
ov5647_open(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)1127 static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1128 {
1129 struct v4l2_mbus_framefmt *format =
1130 v4l2_subdev_get_try_format(sd, fh->state, 0);
1131 struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
1132
1133 crop->left = OV5647_PIXEL_ARRAY_LEFT;
1134 crop->top = OV5647_PIXEL_ARRAY_TOP;
1135 crop->width = OV5647_PIXEL_ARRAY_WIDTH;
1136 crop->height = OV5647_PIXEL_ARRAY_HEIGHT;
1137
1138 *format = OV5647_DEFAULT_FORMAT;
1139
1140 return 0;
1141 }
1142
1143 static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
1144 .open = ov5647_open,
1145 };
1146
ov5647_s_auto_white_balance(struct v4l2_subdev * sd,u32 val)1147 static int ov5647_s_auto_white_balance(struct v4l2_subdev *sd, u32 val)
1148 {
1149 return ov5647_write(sd, OV5647_REG_AWB, val ? 1 : 0);
1150 }
1151
ov5647_s_autogain(struct v4l2_subdev * sd,u32 val)1152 static int ov5647_s_autogain(struct v4l2_subdev *sd, u32 val)
1153 {
1154 int ret;
1155 u8 reg;
1156
1157 /* Non-zero turns on AGC by clearing bit 1.*/
1158 ret = ov5647_read(sd, OV5647_REG_AEC_AGC, ®);
1159 if (ret)
1160 return ret;
1161
1162 return ov5647_write(sd, OV5647_REG_AEC_AGC, val ? reg & ~BIT(1)
1163 : reg | BIT(1));
1164 }
1165
ov5647_s_exposure_auto(struct v4l2_subdev * sd,u32 val)1166 static int ov5647_s_exposure_auto(struct v4l2_subdev *sd, u32 val)
1167 {
1168 int ret;
1169 u8 reg;
1170
1171 /*
1172 * Everything except V4L2_EXPOSURE_MANUAL turns on AEC by
1173 * clearing bit 0.
1174 */
1175 ret = ov5647_read(sd, OV5647_REG_AEC_AGC, ®);
1176 if (ret)
1177 return ret;
1178
1179 return ov5647_write(sd, OV5647_REG_AEC_AGC,
1180 val == V4L2_EXPOSURE_MANUAL ? reg | BIT(0)
1181 : reg & ~BIT(0));
1182 }
1183
ov5647_s_analogue_gain(struct v4l2_subdev * sd,u32 val)1184 static int ov5647_s_analogue_gain(struct v4l2_subdev *sd, u32 val)
1185 {
1186 int ret;
1187
1188 /* 10 bits of gain, 2 in the high register. */
1189 ret = ov5647_write(sd, OV5647_REG_GAIN_HI, (val >> 8) & 3);
1190 if (ret)
1191 return ret;
1192
1193 return ov5647_write(sd, OV5647_REG_GAIN_LO, val & 0xff);
1194 }
1195
ov5647_s_exposure(struct v4l2_subdev * sd,u32 val)1196 static int ov5647_s_exposure(struct v4l2_subdev *sd, u32 val)
1197 {
1198 int ret;
1199
1200 /*
1201 * Sensor has 20 bits, but the bottom 4 bits are fractions of a line
1202 * which we leave as zero (and don't receive in "val").
1203 */
1204 ret = ov5647_write(sd, OV5647_REG_EXP_HI, (val >> 12) & 0xf);
1205 if (ret)
1206 return ret;
1207
1208 ret = ov5647_write(sd, OV5647_REG_EXP_MID, (val >> 4) & 0xff);
1209 if (ret)
1210 return ret;
1211
1212 return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4);
1213 }
1214
ov5647_s_ctrl(struct v4l2_ctrl * ctrl)1215 static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl)
1216 {
1217 struct ov5647 *sensor = container_of(ctrl->handler,
1218 struct ov5647, ctrls);
1219 struct v4l2_subdev *sd = &sensor->sd;
1220 struct i2c_client *client = v4l2_get_subdevdata(sd);
1221 int ret = 0;
1222
1223
1224 /* v4l2_ctrl_lock() locks our own mutex */
1225
1226 if (ctrl->id == V4L2_CID_VBLANK) {
1227 int exposure_max, exposure_def;
1228
1229 /* Update max exposure while meeting expected vblanking */
1230 exposure_max = sensor->mode->format.height + ctrl->val - 4;
1231 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1232 __v4l2_ctrl_modify_range(sensor->exposure,
1233 sensor->exposure->minimum,
1234 exposure_max, sensor->exposure->step,
1235 exposure_def);
1236 }
1237
1238 /*
1239 * If the device is not powered up do not apply any controls
1240 * to H/W at this time. Instead the controls will be restored
1241 * at s_stream(1) time.
1242 */
1243 if (pm_runtime_get_if_in_use(&client->dev) == 0)
1244 return 0;
1245
1246 switch (ctrl->id) {
1247 case V4L2_CID_AUTO_WHITE_BALANCE:
1248 ret = ov5647_s_auto_white_balance(sd, ctrl->val);
1249 break;
1250 case V4L2_CID_AUTOGAIN:
1251 ret = ov5647_s_autogain(sd, ctrl->val);
1252 break;
1253 case V4L2_CID_EXPOSURE_AUTO:
1254 ret = ov5647_s_exposure_auto(sd, ctrl->val);
1255 break;
1256 case V4L2_CID_ANALOGUE_GAIN:
1257 ret = ov5647_s_analogue_gain(sd, ctrl->val);
1258 break;
1259 case V4L2_CID_EXPOSURE:
1260 ret = ov5647_s_exposure(sd, ctrl->val);
1261 break;
1262 case V4L2_CID_VBLANK:
1263 ret = ov5647_write16(sd, OV5647_REG_VTS_HI,
1264 sensor->mode->format.height + ctrl->val);
1265 break;
1266 case V4L2_CID_TEST_PATTERN:
1267 ret = ov5647_write(sd, OV5647_REG_ISPCTRL3D,
1268 ov5647_test_pattern_val[ctrl->val]);
1269 break;
1270
1271 /* Read-only, but we adjust it based on mode. */
1272 case V4L2_CID_PIXEL_RATE:
1273 case V4L2_CID_HBLANK:
1274 /* Read-only, but we adjust it based on mode. */
1275 break;
1276
1277 default:
1278 dev_info(&client->dev,
1279 "Control (id:0x%x, val:0x%x) not supported\n",
1280 ctrl->id, ctrl->val);
1281 return -EINVAL;
1282 }
1283
1284 pm_runtime_put(&client->dev);
1285
1286 return ret;
1287 }
1288
1289 static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
1290 .s_ctrl = ov5647_s_ctrl,
1291 };
1292
ov5647_init_controls(struct ov5647 * sensor)1293 static int ov5647_init_controls(struct ov5647 *sensor)
1294 {
1295 struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
1296 int hblank, exposure_max, exposure_def;
1297
1298 v4l2_ctrl_handler_init(&sensor->ctrls, 9);
1299
1300 v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1301 V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
1302
1303 v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1304 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 0);
1305
1306 v4l2_ctrl_new_std_menu(&sensor->ctrls, &ov5647_ctrl_ops,
1307 V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
1308 0, V4L2_EXPOSURE_MANUAL);
1309
1310 exposure_max = sensor->mode->vts - 4;
1311 exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
1312 sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1313 V4L2_CID_EXPOSURE,
1314 OV5647_EXPOSURE_MIN,
1315 exposure_max, OV5647_EXPOSURE_STEP,
1316 exposure_def);
1317
1318 /* min: 16 = 1.0x; max (10 bits); default: 32 = 2.0x. */
1319 v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1320 V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32);
1321
1322 /* By default, PIXEL_RATE is read only, but it does change per mode */
1323 sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1324 V4L2_CID_PIXEL_RATE,
1325 sensor->mode->pixel_rate,
1326 sensor->mode->pixel_rate, 1,
1327 sensor->mode->pixel_rate);
1328
1329 /* By default, HBLANK is read only, but it does change per mode. */
1330 hblank = sensor->mode->hts - sensor->mode->format.width;
1331 sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1332 V4L2_CID_HBLANK, hblank, hblank, 1,
1333 hblank);
1334
1335 sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
1336 V4L2_CID_VBLANK, OV5647_VBLANK_MIN,
1337 OV5647_VTS_MAX -
1338 sensor->mode->format.height, 1,
1339 sensor->mode->vts -
1340 sensor->mode->format.height);
1341
1342 v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &ov5647_ctrl_ops,
1343 V4L2_CID_TEST_PATTERN,
1344 ARRAY_SIZE(ov5647_test_pattern_menu) - 1,
1345 0, 0, ov5647_test_pattern_menu);
1346
1347 if (sensor->ctrls.error)
1348 goto handler_free;
1349
1350 sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1351 sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1352 sensor->sd.ctrl_handler = &sensor->ctrls;
1353
1354 return 0;
1355
1356 handler_free:
1357 dev_err(&client->dev, "%s Controls initialization failed (%d)\n",
1358 __func__, sensor->ctrls.error);
1359 v4l2_ctrl_handler_free(&sensor->ctrls);
1360
1361 return sensor->ctrls.error;
1362 }
1363
ov5647_parse_dt(struct ov5647 * sensor,struct device_node * np)1364 static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
1365 {
1366 struct v4l2_fwnode_endpoint bus_cfg = {
1367 .bus_type = V4L2_MBUS_CSI2_DPHY,
1368 };
1369 struct device_node *ep;
1370 int ret;
1371
1372 ep = of_graph_get_next_endpoint(np, NULL);
1373 if (!ep)
1374 return -EINVAL;
1375
1376 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
1377 if (ret)
1378 goto out;
1379
1380 sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags &
1381 V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1382
1383 out:
1384 of_node_put(ep);
1385
1386 return ret;
1387 }
1388
ov5647_probe(struct i2c_client * client)1389 static int ov5647_probe(struct i2c_client *client)
1390 {
1391 struct device_node *np = client->dev.of_node;
1392 struct device *dev = &client->dev;
1393 struct ov5647 *sensor;
1394 struct v4l2_subdev *sd;
1395 u32 xclk_freq;
1396 int ret;
1397
1398 sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
1399 if (!sensor)
1400 return -ENOMEM;
1401
1402 if (IS_ENABLED(CONFIG_OF) && np) {
1403 ret = ov5647_parse_dt(sensor, np);
1404 if (ret) {
1405 dev_err(dev, "DT parsing error: %d\n", ret);
1406 return ret;
1407 }
1408 }
1409
1410 sensor->xclk = devm_clk_get(dev, NULL);
1411 if (IS_ERR(sensor->xclk)) {
1412 dev_err(dev, "could not get xclk");
1413 return PTR_ERR(sensor->xclk);
1414 }
1415
1416 xclk_freq = clk_get_rate(sensor->xclk);
1417 if (xclk_freq != 25000000) {
1418 dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
1419 return -EINVAL;
1420 }
1421
1422 /* Request the power down GPIO asserted. */
1423 sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
1424 if (IS_ERR(sensor->pwdn)) {
1425 dev_err(dev, "Failed to get 'pwdn' gpio\n");
1426 return -EINVAL;
1427 }
1428
1429 mutex_init(&sensor->lock);
1430
1431 sensor->mode = OV5647_DEFAULT_MODE;
1432
1433 ret = ov5647_init_controls(sensor);
1434 if (ret)
1435 goto mutex_destroy;
1436
1437 sd = &sensor->sd;
1438 v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
1439 sd->internal_ops = &ov5647_subdev_internal_ops;
1440 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1441
1442 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
1443 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1444 ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
1445 if (ret < 0)
1446 goto ctrl_handler_free;
1447
1448 ret = ov5647_power_on(dev);
1449 if (ret)
1450 goto entity_cleanup;
1451
1452 ret = ov5647_detect(sd);
1453 if (ret < 0)
1454 goto power_off;
1455
1456 ret = v4l2_async_register_subdev(sd);
1457 if (ret < 0)
1458 goto power_off;
1459
1460 /* Enable runtime PM and turn off the device */
1461 pm_runtime_set_active(dev);
1462 pm_runtime_enable(dev);
1463 pm_runtime_idle(dev);
1464
1465 dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
1466
1467 return 0;
1468
1469 power_off:
1470 ov5647_power_off(dev);
1471 entity_cleanup:
1472 media_entity_cleanup(&sd->entity);
1473 ctrl_handler_free:
1474 v4l2_ctrl_handler_free(&sensor->ctrls);
1475 mutex_destroy:
1476 mutex_destroy(&sensor->lock);
1477
1478 return ret;
1479 }
1480
ov5647_remove(struct i2c_client * client)1481 static void ov5647_remove(struct i2c_client *client)
1482 {
1483 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1484 struct ov5647 *sensor = to_sensor(sd);
1485
1486 v4l2_async_unregister_subdev(&sensor->sd);
1487 media_entity_cleanup(&sensor->sd.entity);
1488 v4l2_ctrl_handler_free(&sensor->ctrls);
1489 v4l2_device_unregister_subdev(sd);
1490 pm_runtime_disable(&client->dev);
1491 mutex_destroy(&sensor->lock);
1492 }
1493
1494 static const struct dev_pm_ops ov5647_pm_ops = {
1495 SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
1496 };
1497
1498 static const struct i2c_device_id ov5647_id[] = {
1499 { "ov5647", 0 },
1500 { /* sentinel */ }
1501 };
1502 MODULE_DEVICE_TABLE(i2c, ov5647_id);
1503
1504 #if IS_ENABLED(CONFIG_OF)
1505 static const struct of_device_id ov5647_of_match[] = {
1506 { .compatible = "ovti,ov5647" },
1507 { /* sentinel */ },
1508 };
1509 MODULE_DEVICE_TABLE(of, ov5647_of_match);
1510 #endif
1511
1512 static struct i2c_driver ov5647_driver = {
1513 .driver = {
1514 .of_match_table = of_match_ptr(ov5647_of_match),
1515 .name = "ov5647",
1516 .pm = &ov5647_pm_ops,
1517 },
1518 .probe = ov5647_probe,
1519 .remove = ov5647_remove,
1520 .id_table = ov5647_id,
1521 };
1522
1523 module_i2c_driver(ov5647_driver);
1524
1525 MODULE_AUTHOR("Ramiro Oliveira <roliveir@synopsys.com>");
1526 MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
1527 MODULE_LICENSE("GPL v2");
1528