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Merge branch 'work.regset' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / drivers / media / i2c / ov8856.c
blob4ca27675cc5a62cc1b18554b4a3a1176fad9cb1e
1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 Intel Corporation.
3
4 #include <asm/unaligned.h>
5 #include <linux/acpi.h>
6 #include <linux/clk.h>
7 #include <linux/delay.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/i2c.h>
10 #include <linux/module.h>
11 #include <linux/pm_runtime.h>
12 #include <linux/regulator/consumer.h>
13 #include <media/v4l2-ctrls.h>
14 #include <media/v4l2-device.h>
15 #include <media/v4l2-fwnode.h>
16
17 #define OV8856_REG_VALUE_08BIT 1
18 #define OV8856_REG_VALUE_16BIT 2
19 #define OV8856_REG_VALUE_24BIT 3
20
21 #define OV8856_LINK_FREQ_360MHZ 360000000ULL
22 #define OV8856_LINK_FREQ_180MHZ 180000000ULL
23 #define OV8856_SCLK 144000000ULL
24 #define OV8856_XVCLK_19_2 19200000
25 #define OV8856_DATA_LANES 4
26 #define OV8856_RGB_DEPTH 10
27
28 #define OV8856_REG_CHIP_ID 0x300a
29 #define OV8856_CHIP_ID 0x00885a
30
31 #define OV8856_REG_MODE_SELECT 0x0100
32 #define OV8856_MODE_STANDBY 0x00
33 #define OV8856_MODE_STREAMING 0x01
34
35 /* module revisions */
36 #define OV8856_2A_MODULE 0x01
37 #define OV8856_1B_MODULE 0x02
38
39 /* the OTP read-out buffer is at 0x7000 and 0xf is the offset
40 * of the byte in the OTP that means the module revision
41 */
42 #define OV8856_MODULE_REVISION 0x700f
43 #define OV8856_OTP_MODE_CTRL 0x3d84
44 #define OV8856_OTP_LOAD_CTRL 0x3d81
45 #define OV8856_OTP_MODE_AUTO 0x00
46 #define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0)
47
48 /* vertical-timings from sensor */
49 #define OV8856_REG_VTS 0x380e
50 #define OV8856_VTS_MAX 0x7fff
51
52 /* horizontal-timings from sensor */
53 #define OV8856_REG_HTS 0x380c
54
55 /* Exposure controls from sensor */
56 #define OV8856_REG_EXPOSURE 0x3500
57 #define OV8856_EXPOSURE_MIN 6
58 #define OV8856_EXPOSURE_MAX_MARGIN 6
59 #define OV8856_EXPOSURE_STEP 1
60
61 /* Analog gain controls from sensor */
62 #define OV8856_REG_ANALOG_GAIN 0x3508
63 #define OV8856_ANAL_GAIN_MIN 128
64 #define OV8856_ANAL_GAIN_MAX 2047
65 #define OV8856_ANAL_GAIN_STEP 1
66
67 /* Digital gain controls from sensor */
68 #define OV8856_REG_MWB_R_GAIN 0x5019
69 #define OV8856_REG_MWB_G_GAIN 0x501b
70 #define OV8856_REG_MWB_B_GAIN 0x501d
71 #define OV8856_DGTL_GAIN_MIN 0
72 #define OV8856_DGTL_GAIN_MAX 4095
73 #define OV8856_DGTL_GAIN_STEP 1
74 #define OV8856_DGTL_GAIN_DEFAULT 1024
75
76 /* Test Pattern Control */
77 #define OV8856_REG_TEST_PATTERN 0x5e00
78 #define OV8856_TEST_PATTERN_ENABLE BIT(7)
79 #define OV8856_TEST_PATTERN_BAR_SHIFT 2
80
81 #define to_ov8856(_sd) container_of(_sd, struct ov8856, sd)
82
83 static const char * const ov8856_supply_names[] = {
84 "dovdd", /* Digital I/O power */
85 "avdd", /* Analog power */
86 "dvdd", /* Digital core power */
87 };
88
89 enum {
90 OV8856_LINK_FREQ_720MBPS,
91 OV8856_LINK_FREQ_360MBPS,
92 };
93
94 struct ov8856_reg {
95 u16 address;
96 u8 val;
97 };
98
99 struct ov8856_reg_list {
100 u32 num_of_regs;
101 const struct ov8856_reg *regs;
102 };
103
104 struct ov8856_link_freq_config {
105 const struct ov8856_reg_list reg_list;
106 };
107
108 struct ov8856_mode {
109 /* Frame width in pixels */
110 u32 width;
111
112 /* Frame height in pixels */
113 u32 height;
114
115 /* Horizontal timining size */
116 u32 hts;
117
118 /* Default vertical timining size */
119 u32 vts_def;
120
121 /* Min vertical timining size */
122 u32 vts_min;
123
124 /* Link frequency needed for this resolution */
125 u32 link_freq_index;
126
127 /* Sensor register settings for this resolution */
128 const struct ov8856_reg_list reg_list;
129 };
130
131 static const struct ov8856_reg mipi_data_rate_720mbps[] = {
132 {0x0103, 0x01},
133 {0x0100, 0x00},
134 {0x0302, 0x4b},
135 {0x0303, 0x01},
136 {0x030b, 0x02},
137 {0x030d, 0x4b},
138 {0x031e, 0x0c},
139 };
140
141 static const struct ov8856_reg mipi_data_rate_360mbps[] = {
142 {0x0103, 0x01},
143 {0x0100, 0x00},
144 {0x0302, 0x4b},
145 {0x0303, 0x03},
146 {0x030b, 0x02},
147 {0x030d, 0x4b},
148 {0x031e, 0x0c},
149 };
150
151 static const struct ov8856_reg mode_3280x2464_regs[] = {
152 {0x3000, 0x20},
153 {0x3003, 0x08},
154 {0x300e, 0x20},
155 {0x3010, 0x00},
156 {0x3015, 0x84},
157 {0x3018, 0x72},
158 {0x3021, 0x23},
159 {0x3033, 0x24},
160 {0x3500, 0x00},
161 {0x3501, 0x9a},
162 {0x3502, 0x20},
163 {0x3503, 0x08},
164 {0x3505, 0x83},
165 {0x3508, 0x01},
166 {0x3509, 0x80},
167 {0x350c, 0x00},
168 {0x350d, 0x80},
169 {0x350e, 0x04},
170 {0x350f, 0x00},
171 {0x3510, 0x00},
172 {0x3511, 0x02},
173 {0x3512, 0x00},
174 {0x3600, 0x72},
175 {0x3601, 0x40},
176 {0x3602, 0x30},
177 {0x3610, 0xc5},
178 {0x3611, 0x58},
179 {0x3612, 0x5c},
180 {0x3613, 0xca},
181 {0x3614, 0x20},
182 {0x3628, 0xff},
183 {0x3629, 0xff},
184 {0x362a, 0xff},
185 {0x3633, 0x10},
186 {0x3634, 0x10},
187 {0x3635, 0x10},
188 {0x3636, 0x10},
189 {0x3663, 0x08},
190 {0x3669, 0x34},
191 {0x366e, 0x10},
192 {0x3706, 0x86},
193 {0x370b, 0x7e},
194 {0x3714, 0x23},
195 {0x3730, 0x12},
196 {0x3733, 0x10},
197 {0x3764, 0x00},
198 {0x3765, 0x00},
199 {0x3769, 0x62},
200 {0x376a, 0x2a},
201 {0x376b, 0x30},
202 {0x3780, 0x00},
203 {0x3781, 0x24},
204 {0x3782, 0x00},
205 {0x3783, 0x23},
206 {0x3798, 0x2f},
207 {0x37a1, 0x60},
208 {0x37a8, 0x6a},
209 {0x37ab, 0x3f},
210 {0x37c2, 0x04},
211 {0x37c3, 0xf1},
212 {0x37c9, 0x80},
213 {0x37cb, 0x16},
214 {0x37cc, 0x16},
215 {0x37cd, 0x16},
216 {0x37ce, 0x16},
217 {0x3800, 0x00},
218 {0x3801, 0x00},
219 {0x3802, 0x00},
220 {0x3803, 0x06},
221 {0x3804, 0x0c},
222 {0x3805, 0xdf},
223 {0x3806, 0x09},
224 {0x3807, 0xa7},
225 {0x3808, 0x0c},
226 {0x3809, 0xd0},
227 {0x380a, 0x09},
228 {0x380b, 0xa0},
229 {0x380c, 0x07},
230 {0x380d, 0x88},
231 {0x380e, 0x09},
232 {0x380f, 0xb8},
233 {0x3810, 0x00},
234 {0x3811, 0x00},
235 {0x3812, 0x00},
236 {0x3813, 0x01},
237 {0x3814, 0x01},
238 {0x3815, 0x01},
239 {0x3816, 0x00},
240 {0x3817, 0x00},
241 {0x3818, 0x00},
242 {0x3819, 0x10},
243 {0x3820, 0x80},
244 {0x3821, 0x46},
245 {0x382a, 0x01},
246 {0x382b, 0x01},
247 {0x3830, 0x06},
248 {0x3836, 0x02},
249 {0x3862, 0x04},
250 {0x3863, 0x08},
251 {0x3cc0, 0x33},
252 {0x3d85, 0x17},
253 {0x3d8c, 0x73},
254 {0x3d8d, 0xde},
255 {0x4001, 0xe0},
256 {0x4003, 0x40},
257 {0x4008, 0x00},
258 {0x4009, 0x0b},
259 {0x400a, 0x00},
260 {0x400b, 0x84},
261 {0x400f, 0x80},
262 {0x4010, 0xf0},
263 {0x4011, 0xff},
264 {0x4012, 0x02},
265 {0x4013, 0x01},
266 {0x4014, 0x01},
267 {0x4015, 0x01},
268 {0x4042, 0x00},
269 {0x4043, 0x80},
270 {0x4044, 0x00},
271 {0x4045, 0x80},
272 {0x4046, 0x00},
273 {0x4047, 0x80},
274 {0x4048, 0x00},
275 {0x4049, 0x80},
276 {0x4041, 0x03},
277 {0x404c, 0x20},
278 {0x404d, 0x00},
279 {0x404e, 0x20},
280 {0x4203, 0x80},
281 {0x4307, 0x30},
282 {0x4317, 0x00},
283 {0x4503, 0x08},
284 {0x4601, 0x80},
285 {0x4800, 0x44},
286 {0x4816, 0x53},
287 {0x481b, 0x58},
288 {0x481f, 0x27},
289 {0x4837, 0x16},
290 {0x483c, 0x0f},
291 {0x484b, 0x05},
292 {0x5000, 0x57},
293 {0x5001, 0x0a},
294 {0x5004, 0x04},
295 {0x502e, 0x03},
296 {0x5030, 0x41},
297 {0x5780, 0x14},
298 {0x5781, 0x0f},
299 {0x5782, 0x44},
300 {0x5783, 0x02},
301 {0x5784, 0x01},
302 {0x5785, 0x01},
303 {0x5786, 0x00},
304 {0x5787, 0x04},
305 {0x5788, 0x02},
306 {0x5789, 0x0f},
307 {0x578a, 0xfd},
308 {0x578b, 0xf5},
309 {0x578c, 0xf5},
310 {0x578d, 0x03},
311 {0x578e, 0x08},
312 {0x578f, 0x0c},
313 {0x5790, 0x08},
314 {0x5791, 0x04},
315 {0x5792, 0x00},
316 {0x5793, 0x52},
317 {0x5794, 0xa3},
318 {0x5795, 0x02},
319 {0x5796, 0x20},
320 {0x5797, 0x20},
321 {0x5798, 0xd5},
322 {0x5799, 0xd5},
323 {0x579a, 0x00},
324 {0x579b, 0x50},
325 {0x579c, 0x00},
326 {0x579d, 0x2c},
327 {0x579e, 0x0c},
328 {0x579f, 0x40},
329 {0x57a0, 0x09},
330 {0x57a1, 0x40},
331 {0x59f8, 0x3d},
332 {0x5a08, 0x02},
333 {0x5b00, 0x02},
334 {0x5b01, 0x10},
335 {0x5b02, 0x03},
336 {0x5b03, 0xcf},
337 {0x5b05, 0x6c},
338 {0x5e00, 0x00}
339 };
340
341 static const struct ov8856_reg mode_1640x1232_regs[] = {
342 {0x3000, 0x20},
343 {0x3003, 0x08},
344 {0x300e, 0x20},
345 {0x3010, 0x00},
346 {0x3015, 0x84},
347 {0x3018, 0x72},
348 {0x3021, 0x23},
349 {0x3033, 0x24},
350 {0x3500, 0x00},
351 {0x3501, 0x4c},
352 {0x3502, 0xe0},
353 {0x3503, 0x08},
354 {0x3505, 0x83},
355 {0x3508, 0x01},
356 {0x3509, 0x80},
357 {0x350c, 0x00},
358 {0x350d, 0x80},
359 {0x350e, 0x04},
360 {0x350f, 0x00},
361 {0x3510, 0x00},
362 {0x3511, 0x02},
363 {0x3512, 0x00},
364 {0x3600, 0x72},
365 {0x3601, 0x40},
366 {0x3602, 0x30},
367 {0x3610, 0xc5},
368 {0x3611, 0x58},
369 {0x3612, 0x5c},
370 {0x3613, 0xca},
371 {0x3614, 0x20},
372 {0x3628, 0xff},
373 {0x3629, 0xff},
374 {0x362a, 0xff},
375 {0x3633, 0x10},
376 {0x3634, 0x10},
377 {0x3635, 0x10},
378 {0x3636, 0x10},
379 {0x3663, 0x08},
380 {0x3669, 0x34},
381 {0x366e, 0x08},
382 {0x3706, 0x86},
383 {0x370b, 0x7e},
384 {0x3714, 0x27},
385 {0x3730, 0x12},
386 {0x3733, 0x10},
387 {0x3764, 0x00},
388 {0x3765, 0x00},
389 {0x3769, 0x62},
390 {0x376a, 0x2a},
391 {0x376b, 0x30},
392 {0x3780, 0x00},
393 {0x3781, 0x24},
394 {0x3782, 0x00},
395 {0x3783, 0x23},
396 {0x3798, 0x2f},
397 {0x37a1, 0x60},
398 {0x37a8, 0x6a},
399 {0x37ab, 0x3f},
400 {0x37c2, 0x14},
401 {0x37c3, 0xf1},
402 {0x37c9, 0x80},
403 {0x37cb, 0x16},
404 {0x37cc, 0x16},
405 {0x37cd, 0x16},
406 {0x37ce, 0x16},
407 {0x3800, 0x00},
408 {0x3801, 0x00},
409 {0x3802, 0x00},
410 {0x3803, 0x06},
411 {0x3804, 0x0c},
412 {0x3805, 0xdf},
413 {0x3806, 0x09},
414 {0x3807, 0xa7},
415 {0x3808, 0x06},
416 {0x3809, 0x68},
417 {0x380a, 0x04},
418 {0x380b, 0xd0},
419 {0x380c, 0x0e},
420 {0x380d, 0xec},
421 {0x380e, 0x04},
422 {0x380f, 0xe8},
423 {0x3810, 0x00},
424 {0x3811, 0x00},
425 {0x3812, 0x00},
426 {0x3813, 0x01},
427 {0x3814, 0x03},
428 {0x3815, 0x01},
429 {0x3816, 0x00},
430 {0x3817, 0x00},
431 {0x3818, 0x00},
432 {0x3819, 0x10},
433 {0x3820, 0x90},
434 {0x3821, 0x67},
435 {0x382a, 0x03},
436 {0x382b, 0x01},
437 {0x3830, 0x06},
438 {0x3836, 0x02},
439 {0x3862, 0x04},
440 {0x3863, 0x08},
441 {0x3cc0, 0x33},
442 {0x3d85, 0x17},
443 {0x3d8c, 0x73},
444 {0x3d8d, 0xde},
445 {0x4001, 0xe0},
446 {0x4003, 0x40},
447 {0x4008, 0x00},
448 {0x4009, 0x05},
449 {0x400a, 0x00},
450 {0x400b, 0x84},
451 {0x400f, 0x80},
452 {0x4010, 0xf0},
453 {0x4011, 0xff},
454 {0x4012, 0x02},
455 {0x4013, 0x01},
456 {0x4014, 0x01},
457 {0x4015, 0x01},
458 {0x4042, 0x00},
459 {0x4043, 0x80},
460 {0x4044, 0x00},
461 {0x4045, 0x80},
462 {0x4046, 0x00},
463 {0x4047, 0x80},
464 {0x4048, 0x00},
465 {0x4049, 0x80},
466 {0x4041, 0x03},
467 {0x404c, 0x20},
468 {0x404d, 0x00},
469 {0x404e, 0x20},
470 {0x4203, 0x80},
471 {0x4307, 0x30},
472 {0x4317, 0x00},
473 {0x4503, 0x08},
474 {0x4601, 0x80},
475 {0x4800, 0x44},
476 {0x4816, 0x53},
477 {0x481b, 0x58},
478 {0x481f, 0x27},
479 {0x4837, 0x16},
480 {0x483c, 0x0f},
481 {0x484b, 0x05},
482 {0x5000, 0x57},
483 {0x5001, 0x0a},
484 {0x5004, 0x04},
485 {0x502e, 0x03},
486 {0x5030, 0x41},
487 {0x5780, 0x14},
488 {0x5781, 0x0f},
489 {0x5782, 0x44},
490 {0x5783, 0x02},
491 {0x5784, 0x01},
492 {0x5785, 0x01},
493 {0x5786, 0x00},
494 {0x5787, 0x04},
495 {0x5788, 0x02},
496 {0x5789, 0x0f},
497 {0x578a, 0xfd},
498 {0x578b, 0xf5},
499 {0x578c, 0xf5},
500 {0x578d, 0x03},
501 {0x578e, 0x08},
502 {0x578f, 0x0c},
503 {0x5790, 0x08},
504 {0x5791, 0x04},
505 {0x5792, 0x00},
506 {0x5793, 0x52},
507 {0x5794, 0xa3},
508 {0x5795, 0x00},
509 {0x5796, 0x10},
510 {0x5797, 0x10},
511 {0x5798, 0x73},
512 {0x5799, 0x73},
513 {0x579a, 0x00},
514 {0x579b, 0x28},
515 {0x579c, 0x00},
516 {0x579d, 0x16},
517 {0x579e, 0x06},
518 {0x579f, 0x20},
519 {0x57a0, 0x04},
520 {0x57a1, 0xa0},
521 {0x59f8, 0x3d},
522 {0x5a08, 0x02},
523 {0x5b00, 0x02},
524 {0x5b01, 0x10},
525 {0x5b02, 0x03},
526 {0x5b03, 0xcf},
527 {0x5b05, 0x6c},
528 {0x5e00, 0x00}
529 };
530
531 static const char * const ov8856_test_pattern_menu[] = {
532 "Disabled",
533 "Standard Color Bar",
534 "Top-Bottom Darker Color Bar",
535 "Right-Left Darker Color Bar",
536 "Bottom-Top Darker Color Bar"
537 };
538
539 static const s64 link_freq_menu_items[] = {
540 OV8856_LINK_FREQ_360MHZ,
541 OV8856_LINK_FREQ_180MHZ
542 };
543
544 static const struct ov8856_link_freq_config link_freq_configs[] = {
545 [OV8856_LINK_FREQ_720MBPS] = {
546 .reg_list = {
547 .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
548 .regs = mipi_data_rate_720mbps,
549 }
550 },
551 [OV8856_LINK_FREQ_360MBPS] = {
552 .reg_list = {
553 .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps),
554 .regs = mipi_data_rate_360mbps,
555 }
556 }
557 };
558
559 static const struct ov8856_mode supported_modes[] = {
560 {
561 .width = 3280,
562 .height = 2464,
563 .hts = 1928,
564 .vts_def = 2488,
565 .vts_min = 2488,
566 .reg_list = {
567 .num_of_regs = ARRAY_SIZE(mode_3280x2464_regs),
568 .regs = mode_3280x2464_regs,
569 },
570 .link_freq_index = OV8856_LINK_FREQ_720MBPS,
571 },
572 {
573 .width = 1640,
574 .height = 1232,
575 .hts = 3820,
576 .vts_def = 1256,
577 .vts_min = 1256,
578 .reg_list = {
579 .num_of_regs = ARRAY_SIZE(mode_1640x1232_regs),
580 .regs = mode_1640x1232_regs,
581 },
582 .link_freq_index = OV8856_LINK_FREQ_360MBPS,
583 }
584 };
585
586 struct ov8856 {
587 struct v4l2_subdev sd;
588 struct media_pad pad;
589 struct v4l2_ctrl_handler ctrl_handler;
590
591 struct clk *xvclk;
592 struct gpio_desc *reset_gpio;
593 struct regulator_bulk_data supplies[ARRAY_SIZE(ov8856_supply_names)];
594
595 /* V4L2 Controls */
596 struct v4l2_ctrl *link_freq;
597 struct v4l2_ctrl *pixel_rate;
598 struct v4l2_ctrl *vblank;
599 struct v4l2_ctrl *hblank;
600 struct v4l2_ctrl *exposure;
601
602 /* Current mode */
603 const struct ov8856_mode *cur_mode;
604
605 /* To serialize asynchronus callbacks */
606 struct mutex mutex;
607
608 /* Streaming on/off */
609 bool streaming;
610 };
611
612 static u64 to_pixel_rate(u32 f_index)
613 {
614 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV8856_DATA_LANES;
615
616 do_div(pixel_rate, OV8856_RGB_DEPTH);
617
618 return pixel_rate;
619 }
620
621 static u64 to_pixels_per_line(u32 hts, u32 f_index)
622 {
623 u64 ppl = hts * to_pixel_rate(f_index);
624
625 do_div(ppl, OV8856_SCLK);
626
627 return ppl;
628 }
629
630 static int ov8856_read_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 *val)
631 {
632 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
633 struct i2c_msg msgs[2];
634 u8 addr_buf[2];
635 u8 data_buf[4] = {0};
636 int ret;
637
638 if (len > 4)
639 return -EINVAL;
640
641 put_unaligned_be16(reg, addr_buf);
642 msgs[0].addr = client->addr;
643 msgs[0].flags = 0;
644 msgs[0].len = sizeof(addr_buf);
645 msgs[0].buf = addr_buf;
646 msgs[1].addr = client->addr;
647 msgs[1].flags = I2C_M_RD;
648 msgs[1].len = len;
649 msgs[1].buf = &data_buf[4 - len];
650
651 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
652 if (ret != ARRAY_SIZE(msgs))
653 return -EIO;
654
655 *val = get_unaligned_be32(data_buf);
656
657 return 0;
658 }
659
660 static int ov8856_write_reg(struct ov8856 *ov8856, u16 reg, u16 len, u32 val)
661 {
662 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
663 u8 buf[6];
664
665 if (len > 4)
666 return -EINVAL;
667
668 put_unaligned_be16(reg, buf);
669 put_unaligned_be32(val << 8 * (4 - len), buf + 2);
670 if (i2c_master_send(client, buf, len + 2) != len + 2)
671 return -EIO;
672
673 return 0;
674 }
675
676 static int ov8856_write_reg_list(struct ov8856 *ov8856,
677 const struct ov8856_reg_list *r_list)
678 {
679 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
680 unsigned int i;
681 int ret;
682
683 for (i = 0; i < r_list->num_of_regs; i++) {
684 ret = ov8856_write_reg(ov8856, r_list->regs[i].address, 1,
685 r_list->regs[i].val);
686 if (ret) {
687 dev_err_ratelimited(&client->dev,
688 "failed to write reg 0x%4.4x. error = %d",
689 r_list->regs[i].address, ret);
690 return ret;
691 }
692 }
693
694 return 0;
695 }
696
697 static int ov8856_update_digital_gain(struct ov8856 *ov8856, u32 d_gain)
698 {
699 int ret;
700
701 ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_R_GAIN,
702 OV8856_REG_VALUE_16BIT, d_gain);
703 if (ret)
704 return ret;
705
706 ret = ov8856_write_reg(ov8856, OV8856_REG_MWB_G_GAIN,
707 OV8856_REG_VALUE_16BIT, d_gain);
708 if (ret)
709 return ret;
710
711 return ov8856_write_reg(ov8856, OV8856_REG_MWB_B_GAIN,
712 OV8856_REG_VALUE_16BIT, d_gain);
713 }
714
715 static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern)
716 {
717 if (pattern)
718 pattern = (pattern - 1) << OV8856_TEST_PATTERN_BAR_SHIFT |
719 OV8856_TEST_PATTERN_ENABLE;
720
721 return ov8856_write_reg(ov8856, OV8856_REG_TEST_PATTERN,
722 OV8856_REG_VALUE_08BIT, pattern);
723 }
724
725 static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl)
726 {
727 struct ov8856 *ov8856 = container_of(ctrl->handler,
728 struct ov8856, ctrl_handler);
729 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
730 s64 exposure_max;
731 int ret = 0;
732
733 /* Propagate change of current control to all related controls */
734 if (ctrl->id == V4L2_CID_VBLANK) {
735 /* Update max exposure while meeting expected vblanking */
736 exposure_max = ov8856->cur_mode->height + ctrl->val -
737 OV8856_EXPOSURE_MAX_MARGIN;
738 __v4l2_ctrl_modify_range(ov8856->exposure,
739 ov8856->exposure->minimum,
740 exposure_max, ov8856->exposure->step,
741 exposure_max);
742 }
743
744 /* V4L2 controls values will be applied only when power is already up */
745 if (!pm_runtime_get_if_in_use(&client->dev))
746 return 0;
747
748 switch (ctrl->id) {
749 case V4L2_CID_ANALOGUE_GAIN:
750 ret = ov8856_write_reg(ov8856, OV8856_REG_ANALOG_GAIN,
751 OV8856_REG_VALUE_16BIT, ctrl->val);
752 break;
753
754 case V4L2_CID_DIGITAL_GAIN:
755 ret = ov8856_update_digital_gain(ov8856, ctrl->val);
756 break;
757
758 case V4L2_CID_EXPOSURE:
759 /* 4 least significant bits of expsoure are fractional part */
760 ret = ov8856_write_reg(ov8856, OV8856_REG_EXPOSURE,
761 OV8856_REG_VALUE_24BIT, ctrl->val << 4);
762 break;
763
764 case V4L2_CID_VBLANK:
765 ret = ov8856_write_reg(ov8856, OV8856_REG_VTS,
766 OV8856_REG_VALUE_16BIT,
767 ov8856->cur_mode->height + ctrl->val);
768 break;
769
770 case V4L2_CID_TEST_PATTERN:
771 ret = ov8856_test_pattern(ov8856, ctrl->val);
772 break;
773
774 default:
775 ret = -EINVAL;
776 break;
777 }
778
779 pm_runtime_put(&client->dev);
780
781 return ret;
782 }
783
784 static const struct v4l2_ctrl_ops ov8856_ctrl_ops = {
785 .s_ctrl = ov8856_set_ctrl,
786 };
787
788 static int ov8856_init_controls(struct ov8856 *ov8856)
789 {
790 struct v4l2_ctrl_handler *ctrl_hdlr;
791 s64 exposure_max, h_blank;
792 int ret;
793
794 ctrl_hdlr = &ov8856->ctrl_handler;
795 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
796 if (ret)
797 return ret;
798
799 ctrl_hdlr->lock = &ov8856->mutex;
800 ov8856->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov8856_ctrl_ops,
801 V4L2_CID_LINK_FREQ,
802 ARRAY_SIZE(link_freq_menu_items) - 1,
803 0, link_freq_menu_items);
804 if (ov8856->link_freq)
805 ov8856->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
806
807 ov8856->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops,
808 V4L2_CID_PIXEL_RATE, 0,
809 to_pixel_rate(OV8856_LINK_FREQ_720MBPS),
810 1,
811 to_pixel_rate(OV8856_LINK_FREQ_720MBPS));
812 ov8856->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops,
813 V4L2_CID_VBLANK,
814 ov8856->cur_mode->vts_min - ov8856->cur_mode->height,
815 OV8856_VTS_MAX - ov8856->cur_mode->height, 1,
816 ov8856->cur_mode->vts_def - ov8856->cur_mode->height);
817 h_blank = to_pixels_per_line(ov8856->cur_mode->hts,
818 ov8856->cur_mode->link_freq_index) - ov8856->cur_mode->width;
819 ov8856->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops,
820 V4L2_CID_HBLANK, h_blank, h_blank, 1,
821 h_blank);
822 if (ov8856->hblank)
823 ov8856->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
824
825 v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
826 OV8856_ANAL_GAIN_MIN, OV8856_ANAL_GAIN_MAX,
827 OV8856_ANAL_GAIN_STEP, OV8856_ANAL_GAIN_MIN);
828 v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
829 OV8856_DGTL_GAIN_MIN, OV8856_DGTL_GAIN_MAX,
830 OV8856_DGTL_GAIN_STEP, OV8856_DGTL_GAIN_DEFAULT);
831 exposure_max = ov8856->cur_mode->vts_def - OV8856_EXPOSURE_MAX_MARGIN;
832 ov8856->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov8856_ctrl_ops,
833 V4L2_CID_EXPOSURE,
834 OV8856_EXPOSURE_MIN, exposure_max,
835 OV8856_EXPOSURE_STEP,
836 exposure_max);
837 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov8856_ctrl_ops,
838 V4L2_CID_TEST_PATTERN,
839 ARRAY_SIZE(ov8856_test_pattern_menu) - 1,
840 0, 0, ov8856_test_pattern_menu);
841 if (ctrl_hdlr->error)
842 return ctrl_hdlr->error;
843
844 ov8856->sd.ctrl_handler = ctrl_hdlr;
845
846 return 0;
847 }
848
849 static void ov8856_update_pad_format(const struct ov8856_mode *mode,
850 struct v4l2_mbus_framefmt *fmt)
851 {
852 fmt->width = mode->width;
853 fmt->height = mode->height;
854 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
855 fmt->field = V4L2_FIELD_NONE;
856 }
857
858 static int ov8856_start_streaming(struct ov8856 *ov8856)
859 {
860 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
861 const struct ov8856_reg_list *reg_list;
862 int link_freq_index, ret;
863
864 link_freq_index = ov8856->cur_mode->link_freq_index;
865 reg_list = &link_freq_configs[link_freq_index].reg_list;
866 ret = ov8856_write_reg_list(ov8856, reg_list);
867 if (ret) {
868 dev_err(&client->dev, "failed to set plls");
869 return ret;
870 }
871
872 reg_list = &ov8856->cur_mode->reg_list;
873 ret = ov8856_write_reg_list(ov8856, reg_list);
874 if (ret) {
875 dev_err(&client->dev, "failed to set mode");
876 return ret;
877 }
878
879 ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler);
880 if (ret)
881 return ret;
882
883 ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
884 OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
885 if (ret) {
886 dev_err(&client->dev, "failed to set stream");
887 return ret;
888 }
889
890 return 0;
891 }
892
893 static void ov8856_stop_streaming(struct ov8856 *ov8856)
894 {
895 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
896
897 if (ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
898 OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY))
899 dev_err(&client->dev, "failed to set stream");
900 }
901
902 static int ov8856_set_stream(struct v4l2_subdev *sd, int enable)
903 {
904 struct ov8856 *ov8856 = to_ov8856(sd);
905 struct i2c_client *client = v4l2_get_subdevdata(sd);
906 int ret = 0;
907
908 if (ov8856->streaming == enable)
909 return 0;
910
911 mutex_lock(&ov8856->mutex);
912 if (enable) {
913 ret = pm_runtime_get_sync(&client->dev);
914 if (ret < 0) {
915 pm_runtime_put_noidle(&client->dev);
916 mutex_unlock(&ov8856->mutex);
917 return ret;
918 }
919
920 ret = ov8856_start_streaming(ov8856);
921 if (ret) {
922 enable = 0;
923 ov8856_stop_streaming(ov8856);
924 pm_runtime_put(&client->dev);
925 }
926 } else {
927 ov8856_stop_streaming(ov8856);
928 pm_runtime_put(&client->dev);
929 }
930
931 ov8856->streaming = enable;
932 mutex_unlock(&ov8856->mutex);
933
934 return ret;
935 }
936
937 static int __ov8856_power_on(struct ov8856 *ov8856)
938 {
939 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
940 int ret;
941
942 if (is_acpi_node(dev_fwnode(&client->dev)))
943 return 0;
944
945 ret = clk_prepare_enable(ov8856->xvclk);
946 if (ret < 0) {
947 dev_err(&client->dev, "failed to enable xvclk\n");
948 return ret;
949 }
950
951 if (ov8856->reset_gpio) {
952 gpiod_set_value_cansleep(ov8856->reset_gpio, 1);
953 usleep_range(1000, 2000);
954 }
955
956 ret = regulator_bulk_enable(ARRAY_SIZE(ov8856_supply_names),
957 ov8856->supplies);
958 if (ret < 0) {
959 dev_err(&client->dev, "failed to enable regulators\n");
960 goto disable_clk;
961 }
962
963 gpiod_set_value_cansleep(ov8856->reset_gpio, 0);
964 usleep_range(1500, 1800);
965
966 return 0;
967
968 disable_clk:
969 gpiod_set_value_cansleep(ov8856->reset_gpio, 1);
970 clk_disable_unprepare(ov8856->xvclk);
971
972 return ret;
973 }
974
975 static void __ov8856_power_off(struct ov8856 *ov8856)
976 {
977 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
978
979 if (is_acpi_node(dev_fwnode(&client->dev)))
980 return;
981
982 gpiod_set_value_cansleep(ov8856->reset_gpio, 1);
983 regulator_bulk_disable(ARRAY_SIZE(ov8856_supply_names),
984 ov8856->supplies);
985 clk_disable_unprepare(ov8856->xvclk);
986 }
987
988 static int __maybe_unused ov8856_suspend(struct device *dev)
989 {
990 struct i2c_client *client = to_i2c_client(dev);
991 struct v4l2_subdev *sd = i2c_get_clientdata(client);
992 struct ov8856 *ov8856 = to_ov8856(sd);
993
994 mutex_lock(&ov8856->mutex);
995 if (ov8856->streaming)
996 ov8856_stop_streaming(ov8856);
997
998 __ov8856_power_off(ov8856);
999 mutex_unlock(&ov8856->mutex);
1000
1001 return 0;
1002 }
1003
1004 static int __maybe_unused ov8856_resume(struct device *dev)
1005 {
1006 struct i2c_client *client = to_i2c_client(dev);
1007 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1008 struct ov8856 *ov8856 = to_ov8856(sd);
1009 int ret;
1010
1011 mutex_lock(&ov8856->mutex);
1012
1013 __ov8856_power_on(ov8856);
1014 if (ov8856->streaming) {
1015 ret = ov8856_start_streaming(ov8856);
1016 if (ret) {
1017 ov8856->streaming = false;
1018 ov8856_stop_streaming(ov8856);
1019 mutex_unlock(&ov8856->mutex);
1020 return ret;
1021 }
1022 }
1023
1024 mutex_unlock(&ov8856->mutex);
1025
1026 return 0;
1027 }
1028
1029 static int ov8856_set_format(struct v4l2_subdev *sd,
1030 struct v4l2_subdev_pad_config *cfg,
1031 struct v4l2_subdev_format *fmt)
1032 {
1033 struct ov8856 *ov8856 = to_ov8856(sd);
1034 const struct ov8856_mode *mode;
1035 s32 vblank_def, h_blank;
1036
1037 mode = v4l2_find_nearest_size(supported_modes,
1038 ARRAY_SIZE(supported_modes), width,
1039 height, fmt->format.width,
1040 fmt->format.height);
1041
1042 mutex_lock(&ov8856->mutex);
1043 ov8856_update_pad_format(mode, &fmt->format);
1044 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1045 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
1046 } else {
1047 ov8856->cur_mode = mode;
1048 __v4l2_ctrl_s_ctrl(ov8856->link_freq, mode->link_freq_index);
1049 __v4l2_ctrl_s_ctrl_int64(ov8856->pixel_rate,
1050 to_pixel_rate(mode->link_freq_index));
1051
1052 /* Update limits and set FPS to default */
1053 vblank_def = mode->vts_def - mode->height;
1054 __v4l2_ctrl_modify_range(ov8856->vblank,
1055 mode->vts_min - mode->height,
1056 OV8856_VTS_MAX - mode->height, 1,
1057 vblank_def);
1058 __v4l2_ctrl_s_ctrl(ov8856->vblank, vblank_def);
1059 h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) -
1060 mode->width;
1061 __v4l2_ctrl_modify_range(ov8856->hblank, h_blank, h_blank, 1,
1062 h_blank);
1063 }
1064
1065 mutex_unlock(&ov8856->mutex);
1066
1067 return 0;
1068 }
1069
1070 static int ov8856_get_format(struct v4l2_subdev *sd,
1071 struct v4l2_subdev_pad_config *cfg,
1072 struct v4l2_subdev_format *fmt)
1073 {
1074 struct ov8856 *ov8856 = to_ov8856(sd);
1075
1076 mutex_lock(&ov8856->mutex);
1077 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
1078 fmt->format = *v4l2_subdev_get_try_format(&ov8856->sd, cfg,
1079 fmt->pad);
1080 else
1081 ov8856_update_pad_format(ov8856->cur_mode, &fmt->format);
1082
1083 mutex_unlock(&ov8856->mutex);
1084
1085 return 0;
1086 }
1087
1088 static int ov8856_enum_mbus_code(struct v4l2_subdev *sd,
1089 struct v4l2_subdev_pad_config *cfg,
1090 struct v4l2_subdev_mbus_code_enum *code)
1091 {
1092 /* Only one bayer order GRBG is supported */
1093 if (code->index > 0)
1094 return -EINVAL;
1095
1096 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1097
1098 return 0;
1099 }
1100
1101 static int ov8856_enum_frame_size(struct v4l2_subdev *sd,
1102 struct v4l2_subdev_pad_config *cfg,
1103 struct v4l2_subdev_frame_size_enum *fse)
1104 {
1105 if (fse->index >= ARRAY_SIZE(supported_modes))
1106 return -EINVAL;
1107
1108 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
1109 return -EINVAL;
1110
1111 fse->min_width = supported_modes[fse->index].width;
1112 fse->max_width = fse->min_width;
1113 fse->min_height = supported_modes[fse->index].height;
1114 fse->max_height = fse->min_height;
1115
1116 return 0;
1117 }
1118
1119 static int ov8856_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1120 {
1121 struct ov8856 *ov8856 = to_ov8856(sd);
1122
1123 mutex_lock(&ov8856->mutex);
1124 ov8856_update_pad_format(&supported_modes[0],
1125 v4l2_subdev_get_try_format(sd, fh->pad, 0));
1126 mutex_unlock(&ov8856->mutex);
1127
1128 return 0;
1129 }
1130
1131 static const struct v4l2_subdev_video_ops ov8856_video_ops = {
1132 .s_stream = ov8856_set_stream,
1133 };
1134
1135 static const struct v4l2_subdev_pad_ops ov8856_pad_ops = {
1136 .set_fmt = ov8856_set_format,
1137 .get_fmt = ov8856_get_format,
1138 .enum_mbus_code = ov8856_enum_mbus_code,
1139 .enum_frame_size = ov8856_enum_frame_size,
1140 };
1141
1142 static const struct v4l2_subdev_ops ov8856_subdev_ops = {
1143 .video = &ov8856_video_ops,
1144 .pad = &ov8856_pad_ops,
1145 };
1146
1147 static const struct media_entity_operations ov8856_subdev_entity_ops = {
1148 .link_validate = v4l2_subdev_link_validate,
1149 };
1150
1151 static const struct v4l2_subdev_internal_ops ov8856_internal_ops = {
1152 .open = ov8856_open,
1153 };
1154
1155 static int ov8856_identify_module(struct ov8856 *ov8856)
1156 {
1157 struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
1158 int ret;
1159 u32 val;
1160
1161 ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID,
1162 OV8856_REG_VALUE_24BIT, &val);
1163 if (ret)
1164 return ret;
1165
1166 if (val != OV8856_CHIP_ID) {
1167 dev_err(&client->dev, "chip id mismatch: %x!=%x",
1168 OV8856_CHIP_ID, val);
1169 return -ENXIO;
1170 }
1171
1172 ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
1173 OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
1174 if (ret)
1175 return ret;
1176
1177 ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL,
1178 OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO);
1179 if (ret) {
1180 dev_err(&client->dev, "failed to set otp mode");
1181 return ret;
1182 }
1183
1184 ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL,
1185 OV8856_REG_VALUE_08BIT,
1186 OV8856_OTP_LOAD_CTRL_ENABLE);
1187 if (ret) {
1188 dev_err(&client->dev, "failed to enable load control");
1189 return ret;
1190 }
1191
1192 ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION,
1193 OV8856_REG_VALUE_08BIT, &val);
1194 if (ret) {
1195 dev_err(&client->dev, "failed to read module revision");
1196 return ret;
1197 }
1198
1199 dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n",
1200 val,
1201 val == OV8856_2A_MODULE ? "2A" :
1202 val == OV8856_1B_MODULE ? "1B" : "unknown revision",
1203 client->addr);
1204
1205 ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
1206 OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY);
1207 if (ret) {
1208 dev_err(&client->dev, "failed to exit streaming mode");
1209 return ret;
1210 }
1211
1212 return 0;
1213 }
1214
1215 static int ov8856_get_hwcfg(struct ov8856 *ov8856, struct device *dev)
1216 {
1217 struct fwnode_handle *ep;
1218 struct fwnode_handle *fwnode = dev_fwnode(dev);
1219 struct v4l2_fwnode_endpoint bus_cfg = {
1220 .bus_type = V4L2_MBUS_CSI2_DPHY
1221 };
1222 u32 xvclk_rate;
1223 int ret;
1224 unsigned int i, j;
1225
1226 if (!fwnode)
1227 return -ENXIO;
1228
1229 ret = fwnode_property_read_u32(fwnode, "clock-frequency", &xvclk_rate);
1230 if (ret)
1231 return ret;
1232
1233 if (!is_acpi_node(fwnode)) {
1234 ov8856->xvclk = devm_clk_get(dev, "xvclk");
1235 if (IS_ERR(ov8856->xvclk)) {
1236 dev_err(dev, "could not get xvclk clock (%pe)\n",
1237 ov8856->xvclk);
1238 return PTR_ERR(ov8856->xvclk);
1239 }
1240
1241 clk_set_rate(ov8856->xvclk, xvclk_rate);
1242 xvclk_rate = clk_get_rate(ov8856->xvclk);
1243 }
1244
1245 if (xvclk_rate != OV8856_XVCLK_19_2)
1246 dev_warn(dev, "external clock rate %u is unsupported",
1247 xvclk_rate);
1248
1249 ov8856->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1250 GPIOD_OUT_LOW);
1251 if (IS_ERR(ov8856->reset_gpio))
1252 return PTR_ERR(ov8856->reset_gpio);
1253
1254 for (i = 0; i < ARRAY_SIZE(ov8856_supply_names); i++)
1255 ov8856->supplies[i].supply = ov8856_supply_names[i];
1256
1257 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov8856_supply_names),
1258 ov8856->supplies);
1259 if (ret)
1260 return ret;
1261
1262 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1263 if (!ep)
1264 return -ENXIO;
1265
1266 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1267 fwnode_handle_put(ep);
1268 if (ret)
1269 return ret;
1270
1271 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV8856_DATA_LANES) {
1272 dev_err(dev, "number of CSI2 data lanes %d is not supported",
1273 bus_cfg.bus.mipi_csi2.num_data_lanes);
1274 ret = -EINVAL;
1275 goto check_hwcfg_error;
1276 }
1277
1278 if (!bus_cfg.nr_of_link_frequencies) {
1279 dev_err(dev, "no link frequencies defined");
1280 ret = -EINVAL;
1281 goto check_hwcfg_error;
1282 }
1283
1284 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1285 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1286 if (link_freq_menu_items[i] ==
1287 bus_cfg.link_frequencies[j])
1288 break;
1289 }
1290
1291 if (j == bus_cfg.nr_of_link_frequencies) {
1292 dev_err(dev, "no link frequency %lld supported",
1293 link_freq_menu_items[i]);
1294 ret = -EINVAL;
1295 goto check_hwcfg_error;
1296 }
1297 }
1298
1299 check_hwcfg_error:
1300 v4l2_fwnode_endpoint_free(&bus_cfg);
1301
1302 return ret;
1303 }
1304
1305 static int ov8856_remove(struct i2c_client *client)
1306 {
1307 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1308 struct ov8856 *ov8856 = to_ov8856(sd);
1309
1310 v4l2_async_unregister_subdev(sd);
1311 media_entity_cleanup(&sd->entity);
1312 v4l2_ctrl_handler_free(sd->ctrl_handler);
1313 pm_runtime_disable(&client->dev);
1314 mutex_destroy(&ov8856->mutex);
1315
1316 __ov8856_power_off(ov8856);
1317
1318 return 0;
1319 }
1320
1321 static int ov8856_probe(struct i2c_client *client)
1322 {
1323 struct ov8856 *ov8856;
1324 int ret;
1325
1326 ov8856 = devm_kzalloc(&client->dev, sizeof(*ov8856), GFP_KERNEL);
1327 if (!ov8856)
1328 return -ENOMEM;
1329
1330 ret = ov8856_get_hwcfg(ov8856, &client->dev);
1331 if (ret) {
1332 dev_err(&client->dev, "failed to get HW configuration: %d",
1333 ret);
1334 return ret;
1335 }
1336
1337 v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops);
1338
1339 ret = __ov8856_power_on(ov8856);
1340 if (ret) {
1341 dev_err(&client->dev, "failed to power on\n");
1342 return ret;
1343 }
1344
1345 ret = ov8856_identify_module(ov8856);
1346 if (ret) {
1347 dev_err(&client->dev, "failed to find sensor: %d", ret);
1348 goto probe_power_off;
1349 }
1350
1351 mutex_init(&ov8856->mutex);
1352 ov8856->cur_mode = &supported_modes[0];
1353 ret = ov8856_init_controls(ov8856);
1354 if (ret) {
1355 dev_err(&client->dev, "failed to init controls: %d", ret);
1356 goto probe_error_v4l2_ctrl_handler_free;
1357 }
1358
1359 ov8856->sd.internal_ops = &ov8856_internal_ops;
1360 ov8856->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1361 ov8856->sd.entity.ops = &ov8856_subdev_entity_ops;
1362 ov8856->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1363 ov8856->pad.flags = MEDIA_PAD_FL_SOURCE;
1364 ret = media_entity_pads_init(&ov8856->sd.entity, 1, &ov8856->pad);
1365 if (ret) {
1366 dev_err(&client->dev, "failed to init entity pads: %d", ret);
1367 goto probe_error_v4l2_ctrl_handler_free;
1368 }
1369
1370 ret = v4l2_async_register_subdev_sensor_common(&ov8856->sd);
1371 if (ret < 0) {
1372 dev_err(&client->dev, "failed to register V4L2 subdev: %d",
1373 ret);
1374 goto probe_error_media_entity_cleanup;
1375 }
1376
1377 /*
1378 * Device is already turned on by i2c-core with ACPI domain PM.
1379 * Enable runtime PM and turn off the device.
1380 */
1381 pm_runtime_set_active(&client->dev);
1382 pm_runtime_enable(&client->dev);
1383 pm_runtime_idle(&client->dev);
1384
1385 return 0;
1386
1387 probe_error_media_entity_cleanup:
1388 media_entity_cleanup(&ov8856->sd.entity);
1389
1390 probe_error_v4l2_ctrl_handler_free:
1391 v4l2_ctrl_handler_free(ov8856->sd.ctrl_handler);
1392 mutex_destroy(&ov8856->mutex);
1393
1394 probe_power_off:
1395 __ov8856_power_off(ov8856);
1396
1397 return ret;
1398 }
1399
1400 static const struct dev_pm_ops ov8856_pm_ops = {
1401 SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume)
1402 };
1403
1404 #ifdef CONFIG_ACPI
1405 static const struct acpi_device_id ov8856_acpi_ids[] = {
1406 {"OVTI8856"},
1407 {}
1408 };
1409
1410 MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids);
1411 #endif
1412
1413 static const struct of_device_id ov8856_of_match[] = {
1414 { .compatible = "ovti,ov8856" },
1415 { /* sentinel */ }
1416 };
1417 MODULE_DEVICE_TABLE(of, ov8856_of_match);
1418
1419 static struct i2c_driver ov8856_i2c_driver = {
1420 .driver = {
1421 .name = "ov8856",
1422 .pm = &ov8856_pm_ops,
1423 .acpi_match_table = ACPI_PTR(ov8856_acpi_ids),
1424 .of_match_table = ov8856_of_match,
1425 },
1426 .probe_new = ov8856_probe,
1427 .remove = ov8856_remove,
1428 };
1429
1430 module_i2c_driver(ov8856_i2c_driver);
1431
1432 MODULE_AUTHOR("Ben Kao <ben.kao@intel.com>");
1433 MODULE_DESCRIPTION("OmniVision OV8856 sensor driver");
1434 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support