1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2020 Intel Corporation.
3
4#include <linux/acpi.h>
5#include <linux/clk.h>
6#include <linux/delay.h>
7#include <linux/gpio/consumer.h>
8#include <linux/i2c.h>
9#include <linux/module.h>
10#include <linux/nvmem-provider.h>
11#include <linux/pm_runtime.h>
12#include <linux/regmap.h>
13#include <linux/regulator/consumer.h>
14#include <linux/unaligned.h>
15#include <media/v4l2-ctrls.h>
16#include <media/v4l2-device.h>
17#include <media/v4l2-fwnode.h>
18
19#define OV2740_LINK_FREQ_360MHZ 360000000ULL
20#define OV2740_LINK_FREQ_180MHZ 180000000ULL
21#define OV2740_SCLK 72000000LL
22#define OV2740_MCLK 19200000
23#define OV2740_DATA_LANES 2
24#define OV2740_RGB_DEPTH 10
25
26#define OV2740_REG_CHIP_ID 0x300a
27#define OV2740_CHIP_ID 0x2740
28
29#define OV2740_REG_MODE_SELECT 0x0100
30#define OV2740_MODE_STANDBY 0x00
31#define OV2740_MODE_STREAMING 0x01
32
33/* vertical-timings from sensor */
34#define OV2740_REG_VTS 0x380e
35
36/* horizontal-timings from sensor */
37#define OV2740_REG_HTS 0x380c
38
39/* Exposure controls from sensor */
40#define OV2740_REG_EXPOSURE 0x3500
41#define OV2740_EXPOSURE_MIN 4
42#define OV2740_EXPOSURE_MAX_MARGIN 8
43#define OV2740_EXPOSURE_STEP 1
44
45/* Analog gain controls from sensor */
46#define OV2740_REG_ANALOG_GAIN 0x3508
47#define OV2740_ANAL_GAIN_MIN 128
48#define OV2740_ANAL_GAIN_MAX 1983
49#define OV2740_ANAL_GAIN_STEP 1
50
51/* Digital gain controls from sensor */
52#define OV2740_REG_MWB_R_GAIN 0x500a
53#define OV2740_REG_MWB_G_GAIN 0x500c
54#define OV2740_REG_MWB_B_GAIN 0x500e
55#define OV2740_DGTL_GAIN_MIN 1024
56#define OV2740_DGTL_GAIN_MAX 4095
57#define OV2740_DGTL_GAIN_STEP 1
58#define OV2740_DGTL_GAIN_DEFAULT 1024
59
60/* Test Pattern Control */
61#define OV2740_REG_TEST_PATTERN 0x5040
62#define OV2740_TEST_PATTERN_ENABLE BIT(7)
63#define OV2740_TEST_PATTERN_BAR_SHIFT 2
64
65/* Group Access */
66#define OV2740_REG_GROUP_ACCESS 0x3208
67#define OV2740_GROUP_HOLD_START 0x0
68#define OV2740_GROUP_HOLD_END 0x10
69#define OV2740_GROUP_HOLD_LAUNCH 0xa0
70
71/* ISP CTRL00 */
72#define OV2740_REG_ISP_CTRL00 0x5000
73/* ISP CTRL01 */
74#define OV2740_REG_ISP_CTRL01 0x5001
75/* Customer Addresses: 0x7010 - 0x710F */
76#define CUSTOMER_USE_OTP_SIZE 0x100
77/* OTP registers from sensor */
78#define OV2740_REG_OTP_CUSTOMER 0x7010
79
80static const char * const ov2740_supply_name[] = {
81 "AVDD",
82 "DOVDD",
83 "DVDD",
84};
85
86struct nvm_data {
87 struct nvmem_device *nvmem;
88 struct regmap *regmap;
89 char *nvm_buffer;
90};
91
92enum {
93 OV2740_LINK_FREQ_360MHZ_INDEX,
94 OV2740_LINK_FREQ_180MHZ_INDEX,
95};
96
97struct ov2740_reg {
98 u16 address;
99 u8 val;
100};
101
102struct ov2740_reg_list {
103 u32 num_of_regs;
104 const struct ov2740_reg *regs;
105};
106
107struct ov2740_link_freq_config {
108 const struct ov2740_reg_list reg_list;
109};
110
111struct ov2740_mode {
112 /* Frame width in pixels */
113 u32 width;
114
115 /* Frame height in pixels */
116 u32 height;
117
118 /* Horizontal timining size */
119 u32 hts;
120
121 /* Default vertical timining size */
122 u32 vts_def;
123
124 /* Min vertical timining size */
125 u32 vts_min;
126
127 /* Max vertical timining size */
128 u32 vts_max;
129
130 /* Link frequency needed for this resolution */
131 u32 link_freq_index;
132
133 /* Sensor register settings for this resolution */
134 const struct ov2740_reg_list reg_list;
135};
136
137static const struct ov2740_reg mipi_data_rate_720mbps[] = {
138 {0x0302, 0x4b},
139 {0x030d, 0x4b},
140 {0x030e, 0x02},
141 {0x030a, 0x01},
142 {0x0312, 0x11},
143};
144
145static const struct ov2740_reg mipi_data_rate_360mbps[] = {
146 {0x0302, 0x4b},
147 {0x0303, 0x01},
148 {0x030d, 0x4b},
149 {0x030e, 0x02},
150 {0x030a, 0x01},
151 {0x0312, 0x11},
152 {0x4837, 0x2c},
153};
154
155static const struct ov2740_reg mode_1932x1092_regs_360mhz[] = {
156 {0x3000, 0x00},
157 {0x3018, 0x32},
158 {0x3031, 0x0a},
159 {0x3080, 0x08},
160 {0x3083, 0xB4},
161 {0x3103, 0x00},
162 {0x3104, 0x01},
163 {0x3106, 0x01},
164 {0x3500, 0x00},
165 {0x3501, 0x44},
166 {0x3502, 0x40},
167 {0x3503, 0x88},
168 {0x3507, 0x00},
169 {0x3508, 0x00},
170 {0x3509, 0x80},
171 {0x350c, 0x00},
172 {0x350d, 0x80},
173 {0x3510, 0x00},
174 {0x3511, 0x00},
175 {0x3512, 0x20},
176 {0x3632, 0x00},
177 {0x3633, 0x10},
178 {0x3634, 0x10},
179 {0x3635, 0x10},
180 {0x3645, 0x13},
181 {0x3646, 0x81},
182 {0x3636, 0x10},
183 {0x3651, 0x0a},
184 {0x3656, 0x02},
185 {0x3659, 0x04},
186 {0x365a, 0xda},
187 {0x365b, 0xa2},
188 {0x365c, 0x04},
189 {0x365d, 0x1d},
190 {0x365e, 0x1a},
191 {0x3662, 0xd7},
192 {0x3667, 0x78},
193 {0x3669, 0x0a},
194 {0x366a, 0x92},
195 {0x3700, 0x54},
196 {0x3702, 0x10},
197 {0x3706, 0x42},
198 {0x3709, 0x30},
199 {0x370b, 0xc2},
200 {0x3714, 0x63},
201 {0x3715, 0x01},
202 {0x3716, 0x00},
203 {0x371a, 0x3e},
204 {0x3732, 0x0e},
205 {0x3733, 0x10},
206 {0x375f, 0x0e},
207 {0x3768, 0x30},
208 {0x3769, 0x44},
209 {0x376a, 0x22},
210 {0x377b, 0x20},
211 {0x377c, 0x00},
212 {0x377d, 0x0c},
213 {0x3798, 0x00},
214 {0x37a1, 0x55},
215 {0x37a8, 0x6d},
216 {0x37c2, 0x04},
217 {0x37c5, 0x00},
218 {0x37c8, 0x00},
219 {0x3800, 0x00},
220 {0x3801, 0x00},
221 {0x3802, 0x00},
222 {0x3803, 0x00},
223 {0x3804, 0x07},
224 {0x3805, 0x8f},
225 {0x3806, 0x04},
226 {0x3807, 0x47},
227 {0x3808, 0x07},
228 {0x3809, 0x88},
229 {0x380a, 0x04},
230 {0x380b, 0x40},
231 {0x380c, 0x04},
232 {0x380d, 0x38},
233 {0x380e, 0x04},
234 {0x380f, 0x60},
235 {0x3810, 0x00},
236 {0x3811, 0x04},
237 {0x3812, 0x00},
238 {0x3813, 0x04},
239 {0x3814, 0x01},
240 {0x3815, 0x01},
241 {0x3820, 0x80},
242 {0x3821, 0x46},
243 {0x3822, 0x84},
244 {0x3829, 0x00},
245 {0x382a, 0x01},
246 {0x382b, 0x01},
247 {0x3830, 0x04},
248 {0x3836, 0x01},
249 {0x3837, 0x08},
250 {0x3839, 0x01},
251 {0x383a, 0x00},
252 {0x383b, 0x08},
253 {0x383c, 0x00},
254 {0x3f0b, 0x00},
255 {0x4001, 0x20},
256 {0x4009, 0x07},
257 {0x4003, 0x10},
258 {0x4010, 0xe0},
259 {0x4016, 0x00},
260 {0x4017, 0x10},
261 {0x4044, 0x02},
262 {0x4304, 0x08},
263 {0x4307, 0x30},
264 {0x4320, 0x80},
265 {0x4322, 0x00},
266 {0x4323, 0x00},
267 {0x4324, 0x00},
268 {0x4325, 0x00},
269 {0x4326, 0x00},
270 {0x4327, 0x00},
271 {0x4328, 0x00},
272 {0x4329, 0x00},
273 {0x432c, 0x03},
274 {0x432d, 0x81},
275 {0x4501, 0x84},
276 {0x4502, 0x40},
277 {0x4503, 0x18},
278 {0x4504, 0x04},
279 {0x4508, 0x02},
280 {0x4601, 0x10},
281 {0x4800, 0x00},
282 {0x4816, 0x52},
283 {0x4837, 0x16},
284 {0x5000, 0x7f},
285 {0x5001, 0x00},
286 {0x5005, 0x38},
287 {0x501e, 0x0d},
288 {0x5040, 0x00},
289 {0x5901, 0x00},
290 {0x3800, 0x00},
291 {0x3801, 0x00},
292 {0x3802, 0x00},
293 {0x3803, 0x00},
294 {0x3804, 0x07},
295 {0x3805, 0x8f},
296 {0x3806, 0x04},
297 {0x3807, 0x47},
298 {0x3808, 0x07},
299 {0x3809, 0x8c},
300 {0x380a, 0x04},
301 {0x380b, 0x44},
302 {0x3810, 0x00},
303 {0x3811, 0x00},
304 {0x3812, 0x00},
305 {0x3813, 0x01},
306};
307
308static const struct ov2740_reg mode_1932x1092_regs_180mhz[] = {
309 {0x3000, 0x00},
310 {0x3018, 0x32}, /* 0x32 for 2 lanes, 0x12 for 1 lane */
311 {0x3031, 0x0a},
312 {0x3080, 0x08},
313 {0x3083, 0xB4},
314 {0x3103, 0x00},
315 {0x3104, 0x01},
316 {0x3106, 0x01},
317 {0x3500, 0x00},
318 {0x3501, 0x44},
319 {0x3502, 0x40},
320 {0x3503, 0x88},
321 {0x3507, 0x00},
322 {0x3508, 0x00},
323 {0x3509, 0x80},
324 {0x350c, 0x00},
325 {0x350d, 0x80},
326 {0x3510, 0x00},
327 {0x3511, 0x00},
328 {0x3512, 0x20},
329 {0x3632, 0x00},
330 {0x3633, 0x10},
331 {0x3634, 0x10},
332 {0x3635, 0x10},
333 {0x3645, 0x13},
334 {0x3646, 0x81},
335 {0x3636, 0x10},
336 {0x3651, 0x0a},
337 {0x3656, 0x02},
338 {0x3659, 0x04},
339 {0x365a, 0xda},
340 {0x365b, 0xa2},
341 {0x365c, 0x04},
342 {0x365d, 0x1d},
343 {0x365e, 0x1a},
344 {0x3662, 0xd7},
345 {0x3667, 0x78},
346 {0x3669, 0x0a},
347 {0x366a, 0x92},
348 {0x3700, 0x54},
349 {0x3702, 0x10},
350 {0x3706, 0x42},
351 {0x3709, 0x30},
352 {0x370b, 0xc2},
353 {0x3714, 0x63},
354 {0x3715, 0x01},
355 {0x3716, 0x00},
356 {0x371a, 0x3e},
357 {0x3732, 0x0e},
358 {0x3733, 0x10},
359 {0x375f, 0x0e},
360 {0x3768, 0x30},
361 {0x3769, 0x44},
362 {0x376a, 0x22},
363 {0x377b, 0x20},
364 {0x377c, 0x00},
365 {0x377d, 0x0c},
366 {0x3798, 0x00},
367 {0x37a1, 0x55},
368 {0x37a8, 0x6d},
369 {0x37c2, 0x04},
370 {0x37c5, 0x00},
371 {0x37c8, 0x00},
372 {0x3800, 0x00},
373 {0x3801, 0x00},
374 {0x3802, 0x00},
375 {0x3803, 0x00},
376 {0x3804, 0x07},
377 {0x3805, 0x8f},
378 {0x3806, 0x04},
379 {0x3807, 0x47},
380 {0x3808, 0x07},
381 {0x3809, 0x88},
382 {0x380a, 0x04},
383 {0x380b, 0x40},
384 {0x380c, 0x08},
385 {0x380d, 0x70},
386 {0x380e, 0x04},
387 {0x380f, 0x56},
388 {0x3810, 0x00},
389 {0x3811, 0x04},
390 {0x3812, 0x00},
391 {0x3813, 0x04},
392 {0x3814, 0x01},
393 {0x3815, 0x01},
394 {0x3820, 0x80},
395 {0x3821, 0x46},
396 {0x3822, 0x84},
397 {0x3829, 0x00},
398 {0x382a, 0x01},
399 {0x382b, 0x01},
400 {0x3830, 0x04},
401 {0x3836, 0x01},
402 {0x3837, 0x08},
403 {0x3839, 0x01},
404 {0x383a, 0x00},
405 {0x383b, 0x08},
406 {0x383c, 0x00},
407 {0x3f0b, 0x00},
408 {0x4001, 0x20},
409 {0x4009, 0x07},
410 {0x4003, 0x10},
411 {0x4010, 0xe0},
412 {0x4016, 0x00},
413 {0x4017, 0x10},
414 {0x4044, 0x02},
415 {0x4304, 0x08},
416 {0x4307, 0x30},
417 {0x4320, 0x80},
418 {0x4322, 0x00},
419 {0x4323, 0x00},
420 {0x4324, 0x00},
421 {0x4325, 0x00},
422 {0x4326, 0x00},
423 {0x4327, 0x00},
424 {0x4328, 0x00},
425 {0x4329, 0x00},
426 {0x432c, 0x03},
427 {0x432d, 0x81},
428 {0x4501, 0x84},
429 {0x4502, 0x40},
430 {0x4503, 0x18},
431 {0x4504, 0x04},
432 {0x4508, 0x02},
433 {0x4601, 0x10},
434 {0x4800, 0x00},
435 {0x4816, 0x52},
436 {0x5000, 0x73}, /* 0x7f enable DPC */
437 {0x5001, 0x00},
438 {0x5005, 0x38},
439 {0x501e, 0x0d},
440 {0x5040, 0x00},
441 {0x5901, 0x00},
442 {0x3800, 0x00},
443 {0x3801, 0x00},
444 {0x3802, 0x00},
445 {0x3803, 0x00},
446 {0x3804, 0x07},
447 {0x3805, 0x8f},
448 {0x3806, 0x04},
449 {0x3807, 0x47},
450 {0x3808, 0x07},
451 {0x3809, 0x8c},
452 {0x380a, 0x04},
453 {0x380b, 0x44},
454 {0x3810, 0x00},
455 {0x3811, 0x00},
456 {0x3812, 0x00},
457 {0x3813, 0x01},
458 {0x4003, 0x40}, /* set Black level to 0x40 */
459};
460
461static const char * const ov2740_test_pattern_menu[] = {
462 "Disabled",
463 "Color Bar",
464 "Top-Bottom Darker Color Bar",
465 "Right-Left Darker Color Bar",
466 "Bottom-Top Darker Color Bar",
467};
468
469static const s64 link_freq_menu_items[] = {
470 OV2740_LINK_FREQ_360MHZ,
471 OV2740_LINK_FREQ_180MHZ,
472};
473
474static const struct ov2740_link_freq_config link_freq_configs[] = {
475 [OV2740_LINK_FREQ_360MHZ_INDEX] = {
476 .reg_list = {
477 .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
478 .regs = mipi_data_rate_720mbps,
479 }
480 },
481 [OV2740_LINK_FREQ_180MHZ_INDEX] = {
482 .reg_list = {
483 .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps),
484 .regs = mipi_data_rate_360mbps,
485 }
486 },
487};
488
489static const struct ov2740_mode supported_modes_360mhz[] = {
490 {
491 .width = 1932,
492 .height = 1092,
493 .hts = 2160,
494 .vts_min = 1120,
495 .vts_def = 2186,
496 .vts_max = 32767,
497 .reg_list = {
498 .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_360mhz),
499 .regs = mode_1932x1092_regs_360mhz,
500 },
501 .link_freq_index = OV2740_LINK_FREQ_360MHZ_INDEX,
502 },
503};
504
505static const struct ov2740_mode supported_modes_180mhz[] = {
506 {
507 .width = 1932,
508 .height = 1092,
509 .hts = 2160,
510 .vts_min = 1110,
511 .vts_def = 1110,
512 .vts_max = 2047,
513 .reg_list = {
514 .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_180mhz),
515 .regs = mode_1932x1092_regs_180mhz,
516 },
517 .link_freq_index = OV2740_LINK_FREQ_180MHZ_INDEX,
518 },
519};
520
521struct ov2740 {
522 struct device *dev;
523
524 struct v4l2_subdev sd;
525 struct media_pad pad;
526 struct v4l2_ctrl_handler ctrl_handler;
527
528 /* V4L2 Controls */
529 struct v4l2_ctrl *link_freq;
530 struct v4l2_ctrl *pixel_rate;
531 struct v4l2_ctrl *vblank;
532 struct v4l2_ctrl *hblank;
533 struct v4l2_ctrl *exposure;
534
535 /* GPIOs, clocks, regulators */
536 struct gpio_desc *reset_gpio;
537 struct gpio_desc *powerdown_gpio;
538 struct clk *clk;
539 struct regulator_bulk_data supplies[ARRAY_SIZE(ov2740_supply_name)];
540
541 /* Current mode */
542 const struct ov2740_mode *cur_mode;
543
544 /* NVM data information */
545 struct nvm_data *nvm;
546
547 /* Supported modes */
548 const struct ov2740_mode *supported_modes;
549 int supported_modes_count;
550
551 /* True if the device has been identified */
552 bool identified;
553};
554
555static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev)
556{
557 return container_of(subdev, struct ov2740, sd);
558}
559
560static u64 to_pixel_rate(u32 f_index)
561{
562 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV2740_DATA_LANES;
563
564 do_div(pixel_rate, OV2740_RGB_DEPTH);
565
566 return pixel_rate;
567}
568
569static int ov2740_read_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 *val)
570{
571 struct i2c_client *client = v4l2_get_subdevdata(sd: &ov2740->sd);
572 struct i2c_msg msgs[2];
573 u8 addr_buf[2];
574 u8 data_buf[4] = {0};
575 int ret;
576
577 if (len > sizeof(data_buf))
578 return -EINVAL;
579
580 put_unaligned_be16(val: reg, p: addr_buf);
581 msgs[0].addr = client->addr;
582 msgs[0].flags = 0;
583 msgs[0].len = sizeof(addr_buf);
584 msgs[0].buf = addr_buf;
585 msgs[1].addr = client->addr;
586 msgs[1].flags = I2C_M_RD;
587 msgs[1].len = len;
588 msgs[1].buf = &data_buf[sizeof(data_buf) - len];
589
590 ret = i2c_transfer(adap: client->adapter, msgs, ARRAY_SIZE(msgs));
591 if (ret != ARRAY_SIZE(msgs))
592 return ret < 0 ? ret : -EIO;
593
594 *val = get_unaligned_be32(p: data_buf);
595
596 return 0;
597}
598
599static int ov2740_write_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 val)
600{
601 struct i2c_client *client = v4l2_get_subdevdata(sd: &ov2740->sd);
602 u8 buf[6];
603 int ret;
604
605 if (len > 4)
606 return -EINVAL;
607
608 put_unaligned_be16(val: reg, p: buf);
609 put_unaligned_be32(val: val << 8 * (4 - len), p: buf + 2);
610
611 ret = i2c_master_send(client, buf, count: len + 2);
612 if (ret != len + 2)
613 return ret < 0 ? ret : -EIO;
614
615 return 0;
616}
617
618static int ov2740_write_reg_list(struct ov2740 *ov2740,
619 const struct ov2740_reg_list *r_list)
620{
621 unsigned int i;
622 int ret;
623
624 for (i = 0; i < r_list->num_of_regs; i++) {
625 ret = ov2740_write_reg(ov2740, reg: r_list->regs[i].address, len: 1,
626 val: r_list->regs[i].val);
627 if (ret) {
628 dev_err_ratelimited(ov2740->dev,
629 "write reg 0x%4.4x return err = %d\n",
630 r_list->regs[i].address, ret);
631 return ret;
632 }
633 }
634
635 return 0;
636}
637
638static int ov2740_identify_module(struct ov2740 *ov2740)
639{
640 int ret;
641 u32 val;
642
643 if (ov2740->identified)
644 return 0;
645
646 ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, len: 3, val: &val);
647 if (ret)
648 return ret;
649
650 if (val != OV2740_CHIP_ID) {
651 dev_err(ov2740->dev, "chip id mismatch: %x != %x\n",
652 OV2740_CHIP_ID, val);
653 return -ENXIO;
654 }
655
656 dev_dbg(ov2740->dev, "chip id: 0x%x\n", val);
657
658 ov2740->identified = true;
659
660 return 0;
661}
662
663static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain)
664{
665 int ret;
666
667 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1,
668 OV2740_GROUP_HOLD_START);
669 if (ret)
670 return ret;
671
672 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, len: 2, val: d_gain);
673 if (ret)
674 return ret;
675
676 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_G_GAIN, len: 2, val: d_gain);
677 if (ret)
678 return ret;
679
680 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, len: 2, val: d_gain);
681 if (ret)
682 return ret;
683
684 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1,
685 OV2740_GROUP_HOLD_END);
686 if (ret)
687 return ret;
688
689 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1,
690 OV2740_GROUP_HOLD_LAUNCH);
691 return ret;
692}
693
694static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern)
695{
696 if (pattern)
697 pattern = (pattern - 1) << OV2740_TEST_PATTERN_BAR_SHIFT |
698 OV2740_TEST_PATTERN_ENABLE;
699
700 return ov2740_write_reg(ov2740, OV2740_REG_TEST_PATTERN, len: 1, val: pattern);
701}
702
703static int ov2740_set_ctrl(struct v4l2_ctrl *ctrl)
704{
705 struct ov2740 *ov2740 = container_of(ctrl->handler,
706 struct ov2740, ctrl_handler);
707 s64 exposure_max;
708 int ret;
709
710 /* Propagate change of current control to all related controls */
711 if (ctrl->id == V4L2_CID_VBLANK) {
712 /* Update max exposure while meeting expected vblanking */
713 exposure_max = ov2740->cur_mode->height + ctrl->val -
714 OV2740_EXPOSURE_MAX_MARGIN;
715 __v4l2_ctrl_modify_range(ctrl: ov2740->exposure,
716 min: ov2740->exposure->minimum,
717 max: exposure_max, step: ov2740->exposure->step,
718 def: exposure_max);
719 }
720
721 /* V4L2 controls values will be applied only when power is already up */
722 if (!pm_runtime_get_if_in_use(dev: ov2740->dev))
723 return 0;
724
725 switch (ctrl->id) {
726 case V4L2_CID_ANALOGUE_GAIN:
727 ret = ov2740_write_reg(ov2740, OV2740_REG_ANALOG_GAIN, len: 2,
728 val: ctrl->val);
729 break;
730
731 case V4L2_CID_DIGITAL_GAIN:
732 ret = ov2740_update_digital_gain(ov2740, d_gain: ctrl->val);
733 break;
734
735 case V4L2_CID_EXPOSURE:
736 /* 4 least significant bits of expsoure are fractional part */
737 ret = ov2740_write_reg(ov2740, OV2740_REG_EXPOSURE, len: 3,
738 val: ctrl->val << 4);
739 break;
740
741 case V4L2_CID_VBLANK:
742 ret = ov2740_write_reg(ov2740, OV2740_REG_VTS, len: 2,
743 val: ov2740->cur_mode->height + ctrl->val);
744 break;
745
746 case V4L2_CID_TEST_PATTERN:
747 ret = ov2740_test_pattern(ov2740, pattern: ctrl->val);
748 break;
749
750 default:
751 ret = -EINVAL;
752 break;
753 }
754
755 pm_runtime_put(dev: ov2740->dev);
756
757 return ret;
758}
759
760static const struct v4l2_ctrl_ops ov2740_ctrl_ops = {
761 .s_ctrl = ov2740_set_ctrl,
762};
763
764static int ov2740_init_controls(struct ov2740 *ov2740)
765{
766 struct v4l2_ctrl_handler *ctrl_hdlr;
767 s64 exposure_max, h_blank, pixel_rate;
768 u32 vblank_min, vblank_max, vblank_default;
769 struct v4l2_fwnode_device_properties props;
770 int ret;
771
772 ctrl_hdlr = &ov2740->ctrl_handler;
773 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
774 if (ret)
775 return ret;
776
777 ov2740->link_freq =
778 v4l2_ctrl_new_int_menu(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
779 V4L2_CID_LINK_FREQ,
780 ARRAY_SIZE(link_freq_menu_items) - 1,
781 def: ov2740->supported_modes->link_freq_index,
782 qmenu_int: link_freq_menu_items);
783 if (ov2740->link_freq)
784 ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
785
786 pixel_rate = to_pixel_rate(f_index: ov2740->supported_modes->link_freq_index);
787 ov2740->pixel_rate = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
788 V4L2_CID_PIXEL_RATE, min: 0,
789 max: pixel_rate, step: 1, def: pixel_rate);
790
791 vblank_min = ov2740->cur_mode->vts_min - ov2740->cur_mode->height;
792 vblank_max = ov2740->cur_mode->vts_max - ov2740->cur_mode->height;
793 vblank_default = ov2740->cur_mode->vts_def - ov2740->cur_mode->height;
794 ov2740->vblank = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
795 V4L2_CID_VBLANK, min: vblank_min,
796 max: vblank_max, step: 1, def: vblank_default);
797
798 h_blank = ov2740->cur_mode->hts - ov2740->cur_mode->width;
799 ov2740->hblank = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
800 V4L2_CID_HBLANK, min: h_blank, max: h_blank, step: 1,
801 def: h_blank);
802 if (ov2740->hblank)
803 ov2740->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
804
805 v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
806 OV2740_ANAL_GAIN_MIN, OV2740_ANAL_GAIN_MAX,
807 OV2740_ANAL_GAIN_STEP, OV2740_ANAL_GAIN_MIN);
808 v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
809 OV2740_DGTL_GAIN_MIN, OV2740_DGTL_GAIN_MAX,
810 OV2740_DGTL_GAIN_STEP, OV2740_DGTL_GAIN_DEFAULT);
811 exposure_max = ov2740->cur_mode->vts_def - OV2740_EXPOSURE_MAX_MARGIN;
812 ov2740->exposure = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
813 V4L2_CID_EXPOSURE,
814 OV2740_EXPOSURE_MIN, max: exposure_max,
815 OV2740_EXPOSURE_STEP,
816 def: exposure_max);
817 v4l2_ctrl_new_std_menu_items(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops,
818 V4L2_CID_TEST_PATTERN,
819 ARRAY_SIZE(ov2740_test_pattern_menu) - 1,
820 mask: 0, def: 0, qmenu: ov2740_test_pattern_menu);
821
822 ret = v4l2_fwnode_device_parse(dev: ov2740->dev, props: &props);
823 if (ret) {
824 v4l2_ctrl_handler_free(hdl: ctrl_hdlr);
825 return ret;
826 }
827
828 v4l2_ctrl_new_fwnode_properties(hdl: ctrl_hdlr, ctrl_ops: &ov2740_ctrl_ops, p: &props);
829
830 if (ctrl_hdlr->error) {
831 v4l2_ctrl_handler_free(hdl: ctrl_hdlr);
832 return ctrl_hdlr->error;
833 }
834
835 ov2740->sd.ctrl_handler = ctrl_hdlr;
836
837 return 0;
838}
839
840static void ov2740_update_pad_format(const struct ov2740_mode *mode,
841 struct v4l2_mbus_framefmt *fmt)
842{
843 fmt->width = mode->width;
844 fmt->height = mode->height;
845 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
846 fmt->field = V4L2_FIELD_NONE;
847}
848
849static int ov2740_load_otp_data(struct nvm_data *nvm)
850{
851 struct device *dev = regmap_get_device(map: nvm->regmap);
852 struct ov2740 *ov2740 = to_ov2740(subdev: dev_get_drvdata(dev));
853 u32 isp_ctrl00 = 0;
854 u32 isp_ctrl01 = 0;
855 int ret;
856
857 if (nvm->nvm_buffer)
858 return 0;
859
860 nvm->nvm_buffer = kzalloc(CUSTOMER_USE_OTP_SIZE, GFP_KERNEL);
861 if (!nvm->nvm_buffer)
862 return -ENOMEM;
863
864 ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1, val: &isp_ctrl00);
865 if (ret) {
866 dev_err(dev, "failed to read ISP CTRL00\n");
867 goto err;
868 }
869
870 ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1, val: &isp_ctrl01);
871 if (ret) {
872 dev_err(dev, "failed to read ISP CTRL01\n");
873 goto err;
874 }
875
876 /* Clear bit 5 of ISP CTRL00 */
877 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1,
878 val: isp_ctrl00 & ~BIT(5));
879 if (ret) {
880 dev_err(dev, "failed to set ISP CTRL00\n");
881 goto err;
882 }
883
884 /* Clear bit 7 of ISP CTRL01 */
885 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1,
886 val: isp_ctrl01 & ~BIT(7));
887 if (ret) {
888 dev_err(dev, "failed to set ISP CTRL01\n");
889 goto err;
890 }
891
892 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1,
893 OV2740_MODE_STREAMING);
894 if (ret) {
895 dev_err(dev, "failed to set streaming mode\n");
896 goto err;
897 }
898
899 /*
900 * Users are not allowed to access OTP-related registers and memory
901 * during the 20 ms period after streaming starts (0x100 = 0x01).
902 */
903 msleep(msecs: 20);
904
905 ret = regmap_bulk_read(map: nvm->regmap, OV2740_REG_OTP_CUSTOMER,
906 val: nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE);
907 if (ret) {
908 dev_err(dev, "failed to read OTP data, ret %d\n", ret);
909 goto err;
910 }
911
912 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1,
913 OV2740_MODE_STANDBY);
914 if (ret) {
915 dev_err(dev, "failed to set streaming mode\n");
916 goto err;
917 }
918
919 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1, val: isp_ctrl01);
920 if (ret) {
921 dev_err(dev, "failed to set ISP CTRL01\n");
922 goto err;
923 }
924
925 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1, val: isp_ctrl00);
926 if (ret) {
927 dev_err(dev, "failed to set ISP CTRL00\n");
928 goto err;
929 }
930
931 return 0;
932err:
933 kfree(objp: nvm->nvm_buffer);
934 nvm->nvm_buffer = NULL;
935
936 return ret;
937}
938
939static int ov2740_start_streaming(struct ov2740 *ov2740)
940{
941 const struct ov2740_reg_list *reg_list;
942 int link_freq_index;
943 int ret;
944
945 ret = ov2740_identify_module(ov2740);
946 if (ret)
947 return ret;
948
949 if (ov2740->nvm)
950 ov2740_load_otp_data(nvm: ov2740->nvm);
951
952 /* Reset the sensor */
953 ret = ov2740_write_reg(ov2740, reg: 0x0103, len: 1, val: 0x01);
954 if (ret) {
955 dev_err(ov2740->dev, "failed to reset\n");
956 return ret;
957 }
958
959 usleep_range(min: 10000, max: 15000);
960
961 link_freq_index = ov2740->cur_mode->link_freq_index;
962 reg_list = &link_freq_configs[link_freq_index].reg_list;
963 ret = ov2740_write_reg_list(ov2740, r_list: reg_list);
964 if (ret) {
965 dev_err(ov2740->dev, "failed to set plls\n");
966 return ret;
967 }
968
969 reg_list = &ov2740->cur_mode->reg_list;
970 ret = ov2740_write_reg_list(ov2740, r_list: reg_list);
971 if (ret) {
972 dev_err(ov2740->dev, "failed to set mode\n");
973 return ret;
974 }
975
976 ret = __v4l2_ctrl_handler_setup(hdl: ov2740->sd.ctrl_handler);
977 if (ret)
978 return ret;
979
980 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1,
981 OV2740_MODE_STREAMING);
982 if (ret)
983 dev_err(ov2740->dev, "failed to start streaming\n");
984
985 return ret;
986}
987
988static void ov2740_stop_streaming(struct ov2740 *ov2740)
989{
990 if (ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1,
991 OV2740_MODE_STANDBY))
992 dev_err(ov2740->dev, "failed to stop streaming\n");
993}
994
995static int ov2740_set_stream(struct v4l2_subdev *sd, int enable)
996{
997 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
998 struct v4l2_subdev_state *sd_state;
999 int ret = 0;
1000
1001 sd_state = v4l2_subdev_lock_and_get_active_state(sd: &ov2740->sd);
1002
1003 if (enable) {
1004 ret = pm_runtime_resume_and_get(dev: ov2740->dev);
1005 if (ret < 0)
1006 goto out_unlock;
1007
1008 ret = ov2740_start_streaming(ov2740);
1009 if (ret) {
1010 enable = 0;
1011 ov2740_stop_streaming(ov2740);
1012 pm_runtime_put(dev: ov2740->dev);
1013 }
1014 } else {
1015 ov2740_stop_streaming(ov2740);
1016 pm_runtime_put(dev: ov2740->dev);
1017 }
1018
1019out_unlock:
1020 v4l2_subdev_unlock_state(state: sd_state);
1021
1022 return ret;
1023}
1024
1025static int ov2740_set_format(struct v4l2_subdev *sd,
1026 struct v4l2_subdev_state *sd_state,
1027 struct v4l2_subdev_format *fmt)
1028{
1029 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
1030 const struct ov2740_mode *mode;
1031 s32 vblank_def, h_blank;
1032
1033 mode = v4l2_find_nearest_size(ov2740->supported_modes,
1034 ov2740->supported_modes_count,
1035 width, height,
1036 fmt->format.width, fmt->format.height);
1037
1038 ov2740_update_pad_format(mode, fmt: &fmt->format);
1039 *v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format;
1040
1041 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
1042 return 0;
1043
1044 ov2740->cur_mode = mode;
1045 __v4l2_ctrl_s_ctrl(ctrl: ov2740->link_freq, val: mode->link_freq_index);
1046 __v4l2_ctrl_s_ctrl_int64(ctrl: ov2740->pixel_rate,
1047 val: to_pixel_rate(f_index: mode->link_freq_index));
1048
1049 /* Update limits and set FPS to default */
1050 vblank_def = mode->vts_def - mode->height;
1051 __v4l2_ctrl_modify_range(ctrl: ov2740->vblank,
1052 min: mode->vts_min - mode->height,
1053 max: mode->vts_max - mode->height, step: 1, def: vblank_def);
1054 __v4l2_ctrl_s_ctrl(ctrl: ov2740->vblank, val: vblank_def);
1055 h_blank = mode->hts - mode->width;
1056 __v4l2_ctrl_modify_range(ctrl: ov2740->hblank, min: h_blank, max: h_blank, step: 1, def: h_blank);
1057
1058 return 0;
1059}
1060
1061static int ov2740_enum_mbus_code(struct v4l2_subdev *sd,
1062 struct v4l2_subdev_state *sd_state,
1063 struct v4l2_subdev_mbus_code_enum *code)
1064{
1065 if (code->index > 0)
1066 return -EINVAL;
1067
1068 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1069
1070 return 0;
1071}
1072
1073static int ov2740_enum_frame_size(struct v4l2_subdev *sd,
1074 struct v4l2_subdev_state *sd_state,
1075 struct v4l2_subdev_frame_size_enum *fse)
1076{
1077 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
1078 const struct ov2740_mode *supported_modes = ov2740->supported_modes;
1079
1080 if (fse->index >= ov2740->supported_modes_count)
1081 return -EINVAL;
1082
1083 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
1084 return -EINVAL;
1085
1086 fse->min_width = supported_modes[fse->index].width;
1087 fse->max_width = fse->min_width;
1088 fse->min_height = supported_modes[fse->index].height;
1089 fse->max_height = fse->min_height;
1090
1091 return 0;
1092}
1093
1094static int ov2740_init_state(struct v4l2_subdev *sd,
1095 struct v4l2_subdev_state *sd_state)
1096{
1097 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
1098
1099 ov2740_update_pad_format(mode: &ov2740->supported_modes[0],
1100 v4l2_subdev_state_get_format(sd_state, 0));
1101 return 0;
1102}
1103
1104static const struct v4l2_subdev_video_ops ov2740_video_ops = {
1105 .s_stream = ov2740_set_stream,
1106};
1107
1108static const struct v4l2_subdev_pad_ops ov2740_pad_ops = {
1109 .get_fmt = v4l2_subdev_get_fmt,
1110 .set_fmt = ov2740_set_format,
1111 .enum_mbus_code = ov2740_enum_mbus_code,
1112 .enum_frame_size = ov2740_enum_frame_size,
1113};
1114
1115static const struct v4l2_subdev_ops ov2740_subdev_ops = {
1116 .video = &ov2740_video_ops,
1117 .pad = &ov2740_pad_ops,
1118};
1119
1120static const struct v4l2_subdev_internal_ops ov2740_internal_ops = {
1121 .init_state = ov2740_init_state,
1122};
1123
1124static const struct media_entity_operations ov2740_subdev_entity_ops = {
1125 .link_validate = v4l2_subdev_link_validate,
1126};
1127
1128static int ov2740_check_hwcfg(struct ov2740 *ov2740)
1129{
1130 struct device *dev = ov2740->dev;
1131 struct fwnode_handle *ep;
1132 struct fwnode_handle *fwnode = dev_fwnode(dev);
1133 struct v4l2_fwnode_endpoint bus_cfg = {
1134 .bus_type = V4L2_MBUS_CSI2_DPHY
1135 };
1136 int ret;
1137 unsigned int i, j;
1138
1139 /*
1140 * Sometimes the fwnode graph is initialized by the bridge driver,
1141 * wait for this.
1142 */
1143 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1144 if (!ep)
1145 return dev_err_probe(dev, err: -EPROBE_DEFER,
1146 fmt: "waiting for fwnode graph endpoint\n");
1147
1148 ret = v4l2_fwnode_endpoint_alloc_parse(fwnode: ep, vep: &bus_cfg);
1149 fwnode_handle_put(fwnode: ep);
1150 if (ret)
1151 return dev_err_probe(dev, err: ret, fmt: "parsing endpoint failed\n");
1152
1153 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV2740_DATA_LANES) {
1154 ret = dev_err_probe(dev, err: -EINVAL,
1155 fmt: "number of CSI2 data lanes %d is not supported\n",
1156 bus_cfg.bus.mipi_csi2.num_data_lanes);
1157 goto check_hwcfg_error;
1158 }
1159
1160 if (!bus_cfg.nr_of_link_frequencies) {
1161 ret = dev_err_probe(dev, err: -EINVAL, fmt: "no link frequencies defined\n");
1162 goto check_hwcfg_error;
1163 }
1164
1165 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1166 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1167 if (link_freq_menu_items[i] ==
1168 bus_cfg.link_frequencies[j])
1169 break;
1170 }
1171
1172 if (j == bus_cfg.nr_of_link_frequencies)
1173 continue;
1174
1175 switch (i) {
1176 case OV2740_LINK_FREQ_360MHZ_INDEX:
1177 ov2740->supported_modes = supported_modes_360mhz;
1178 ov2740->supported_modes_count =
1179 ARRAY_SIZE(supported_modes_360mhz);
1180 break;
1181 case OV2740_LINK_FREQ_180MHZ_INDEX:
1182 ov2740->supported_modes = supported_modes_180mhz;
1183 ov2740->supported_modes_count =
1184 ARRAY_SIZE(supported_modes_180mhz);
1185 break;
1186 }
1187
1188 break; /* Prefer modes from first available link-freq */
1189 }
1190
1191 if (!ov2740->supported_modes)
1192 ret = dev_err_probe(dev, err: -EINVAL,
1193 fmt: "no supported link frequencies\n");
1194
1195check_hwcfg_error:
1196 v4l2_fwnode_endpoint_free(vep: &bus_cfg);
1197
1198 return ret;
1199}
1200
1201static void ov2740_remove(struct i2c_client *client)
1202{
1203 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1204
1205 v4l2_async_unregister_subdev(sd);
1206 media_entity_cleanup(entity: &sd->entity);
1207 v4l2_subdev_cleanup(sd);
1208 v4l2_ctrl_handler_free(hdl: sd->ctrl_handler);
1209 pm_runtime_disable(dev: &client->dev);
1210}
1211
1212static int ov2740_nvmem_read(void *priv, unsigned int off, void *val,
1213 size_t count)
1214{
1215 struct nvm_data *nvm = priv;
1216 struct device *dev = regmap_get_device(map: nvm->regmap);
1217 struct ov2740 *ov2740 = to_ov2740(subdev: dev_get_drvdata(dev));
1218 struct v4l2_subdev_state *sd_state;
1219 int ret = 0;
1220
1221 /* Serialise sensor access */
1222 sd_state = v4l2_subdev_lock_and_get_active_state(sd: &ov2740->sd);
1223
1224 if (nvm->nvm_buffer) {
1225 memcpy(val, nvm->nvm_buffer + off, count);
1226 goto exit;
1227 }
1228
1229 ret = pm_runtime_resume_and_get(dev);
1230 if (ret < 0) {
1231 goto exit;
1232 }
1233
1234 ret = ov2740_load_otp_data(nvm);
1235 if (!ret)
1236 memcpy(val, nvm->nvm_buffer + off, count);
1237
1238 pm_runtime_put(dev);
1239exit:
1240 v4l2_subdev_unlock_state(state: sd_state);
1241 return ret;
1242}
1243
1244static int ov2740_register_nvmem(struct i2c_client *client,
1245 struct ov2740 *ov2740)
1246{
1247 struct nvm_data *nvm;
1248 struct regmap_config regmap_config = { };
1249 struct nvmem_config nvmem_config = { };
1250 struct regmap *regmap;
1251 struct device *dev = ov2740->dev;
1252
1253 nvm = devm_kzalloc(dev, size: sizeof(*nvm), GFP_KERNEL);
1254 if (!nvm)
1255 return -ENOMEM;
1256
1257 regmap_config.val_bits = 8;
1258 regmap_config.reg_bits = 16;
1259 regmap_config.disable_locking = true;
1260 regmap = devm_regmap_init_i2c(client, &regmap_config);
1261 if (IS_ERR(ptr: regmap))
1262 return PTR_ERR(ptr: regmap);
1263
1264 nvm->regmap = regmap;
1265
1266 nvmem_config.name = dev_name(dev);
1267 nvmem_config.dev = dev;
1268 nvmem_config.read_only = true;
1269 nvmem_config.root_only = true;
1270 nvmem_config.owner = THIS_MODULE;
1271 nvmem_config.compat = true;
1272 nvmem_config.base_dev = dev;
1273 nvmem_config.reg_read = ov2740_nvmem_read;
1274 nvmem_config.reg_write = NULL;
1275 nvmem_config.priv = nvm;
1276 nvmem_config.stride = 1;
1277 nvmem_config.word_size = 1;
1278 nvmem_config.size = CUSTOMER_USE_OTP_SIZE;
1279
1280 nvm->nvmem = devm_nvmem_register(dev, cfg: &nvmem_config);
1281 if (IS_ERR(ptr: nvm->nvmem))
1282 return PTR_ERR(ptr: nvm->nvmem);
1283
1284 ov2740->nvm = nvm;
1285 return 0;
1286}
1287
1288static int ov2740_suspend(struct device *dev)
1289{
1290 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1291 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
1292
1293 gpiod_set_value_cansleep(desc: ov2740->reset_gpio, value: 1);
1294 gpiod_set_value_cansleep(desc: ov2740->powerdown_gpio, value: 1);
1295 clk_disable_unprepare(clk: ov2740->clk);
1296 regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name),
1297 consumers: ov2740->supplies);
1298 return 0;
1299}
1300
1301static int ov2740_resume(struct device *dev)
1302{
1303 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1304 struct ov2740 *ov2740 = to_ov2740(subdev: sd);
1305 int ret;
1306
1307 ret = regulator_bulk_enable(ARRAY_SIZE(ov2740_supply_name),
1308 consumers: ov2740->supplies);
1309 if (ret)
1310 return ret;
1311
1312 ret = clk_prepare_enable(clk: ov2740->clk);
1313 if (ret) {
1314 regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name),
1315 consumers: ov2740->supplies);
1316 return ret;
1317 }
1318
1319 gpiod_set_value_cansleep(desc: ov2740->powerdown_gpio, value: 0);
1320 gpiod_set_value_cansleep(desc: ov2740->reset_gpio, value: 0);
1321 msleep(msecs: 20);
1322
1323 return 0;
1324}
1325
1326static int ov2740_probe(struct i2c_client *client)
1327{
1328 struct device *dev = &client->dev;
1329 struct ov2740 *ov2740;
1330 unsigned long freq;
1331 bool full_power;
1332 unsigned int i;
1333 int ret;
1334
1335 ov2740 = devm_kzalloc(dev: &client->dev, size: sizeof(*ov2740), GFP_KERNEL);
1336 if (!ov2740)
1337 return -ENOMEM;
1338
1339 ov2740->dev = &client->dev;
1340
1341 v4l2_i2c_subdev_init(sd: &ov2740->sd, client, ops: &ov2740_subdev_ops);
1342 ov2740->sd.internal_ops = &ov2740_internal_ops;
1343
1344 ret = ov2740_check_hwcfg(ov2740);
1345 if (ret)
1346 return ret;
1347
1348 ov2740->reset_gpio = devm_gpiod_get_optional(dev, con_id: "reset", flags: GPIOD_OUT_HIGH);
1349 if (IS_ERR(ptr: ov2740->reset_gpio)) {
1350 return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->reset_gpio),
1351 fmt: "failed to get reset GPIO\n");
1352 }
1353
1354 ov2740->powerdown_gpio = devm_gpiod_get_optional(dev, con_id: "powerdown", flags: GPIOD_OUT_HIGH);
1355 if (IS_ERR(ptr: ov2740->powerdown_gpio)) {
1356 return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->powerdown_gpio),
1357 fmt: "failed to get powerdown GPIO\n");
1358 }
1359
1360 if (ov2740->reset_gpio || ov2740->powerdown_gpio) {
1361 /*
1362 * Ensure reset/powerdown is asserted for at least 20 ms before
1363 * ov2740_resume() deasserts it.
1364 */
1365 msleep(msecs: 20);
1366 }
1367
1368 ov2740->clk = devm_v4l2_sensor_clk_get(dev, id: "clk");
1369 if (IS_ERR(ptr: ov2740->clk))
1370 return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->clk),
1371 fmt: "failed to get clock\n");
1372
1373 freq = clk_get_rate(clk: ov2740->clk);
1374 if (freq != OV2740_MCLK)
1375 return dev_err_probe(dev, err: -EINVAL,
1376 fmt: "external clock %lu is not supported\n",
1377 freq);
1378
1379 for (i = 0; i < ARRAY_SIZE(ov2740_supply_name); i++)
1380 ov2740->supplies[i].supply = ov2740_supply_name[i];
1381
1382 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov2740_supply_name),
1383 consumers: ov2740->supplies);
1384 if (ret)
1385 return dev_err_probe(dev, err: ret, fmt: "failed to get regulators\n");
1386
1387 full_power = acpi_dev_state_d0(dev: ov2740->dev);
1388 if (full_power) {
1389 /* ACPI does not always clear the reset GPIO / enable the clock */
1390 ret = ov2740_resume(dev);
1391 if (ret)
1392 return dev_err_probe(dev, err: ret, fmt: "failed to power on sensor\n");
1393
1394 ret = ov2740_identify_module(ov2740);
1395 if (ret) {
1396 dev_err_probe(dev, err: ret, fmt: "failed to find sensor\n");
1397 goto probe_error_power_off;
1398 }
1399 }
1400
1401 ov2740->cur_mode = &ov2740->supported_modes[0];
1402 ret = ov2740_init_controls(ov2740);
1403 if (ret) {
1404 dev_err_probe(dev, err: ret, fmt: "failed to init controls\n");
1405 goto probe_error_v4l2_ctrl_handler_free;
1406 }
1407
1408 ov2740->sd.state_lock = ov2740->ctrl_handler.lock;
1409 ov2740->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1410 ov2740->sd.entity.ops = &ov2740_subdev_entity_ops;
1411 ov2740->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1412 ov2740->pad.flags = MEDIA_PAD_FL_SOURCE;
1413 ret = media_entity_pads_init(entity: &ov2740->sd.entity, num_pads: 1, pads: &ov2740->pad);
1414 if (ret) {
1415 dev_err_probe(dev, err: ret, fmt: "failed to init entity pads\n");
1416 goto probe_error_v4l2_ctrl_handler_free;
1417 }
1418
1419 ret = v4l2_subdev_init_finalize(&ov2740->sd);
1420 if (ret)
1421 goto probe_error_media_entity_cleanup;
1422
1423 /* Set the device's state to active if it's in D0 state. */
1424 if (full_power)
1425 pm_runtime_set_active(dev: ov2740->dev);
1426 pm_runtime_enable(dev: ov2740->dev);
1427 pm_runtime_idle(dev: ov2740->dev);
1428
1429 ret = v4l2_async_register_subdev_sensor(sd: &ov2740->sd);
1430 if (ret < 0) {
1431 dev_err_probe(dev, err: ret, fmt: "failed to register V4L2 subdev\n");
1432 goto probe_error_v4l2_subdev_cleanup;
1433 }
1434
1435 ret = ov2740_register_nvmem(client, ov2740);
1436 if (ret)
1437 dev_warn(ov2740->dev, "register nvmem failed, ret %d\n", ret);
1438
1439 return 0;
1440
1441probe_error_v4l2_subdev_cleanup:
1442 pm_runtime_disable(dev: ov2740->dev);
1443 pm_runtime_set_suspended(dev: ov2740->dev);
1444 v4l2_subdev_cleanup(sd: &ov2740->sd);
1445
1446probe_error_media_entity_cleanup:
1447 media_entity_cleanup(entity: &ov2740->sd.entity);
1448
1449probe_error_v4l2_ctrl_handler_free:
1450 v4l2_ctrl_handler_free(hdl: ov2740->sd.ctrl_handler);
1451
1452probe_error_power_off:
1453 if (full_power)
1454 ov2740_suspend(dev);
1455
1456 return ret;
1457}
1458
1459static DEFINE_RUNTIME_DEV_PM_OPS(ov2740_pm_ops, ov2740_suspend, ov2740_resume,
1460 NULL);
1461
1462static const struct acpi_device_id ov2740_acpi_ids[] = {
1463 {"INT3474"},
1464 {}
1465};
1466
1467MODULE_DEVICE_TABLE(acpi, ov2740_acpi_ids);
1468
1469static struct i2c_driver ov2740_i2c_driver = {
1470 .driver = {
1471 .name = "ov2740",
1472 .acpi_match_table = ov2740_acpi_ids,
1473 .pm = pm_sleep_ptr(&ov2740_pm_ops),
1474 },
1475 .probe = ov2740_probe,
1476 .remove = ov2740_remove,
1477 .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
1478};
1479
1480module_i2c_driver(ov2740_i2c_driver);
1481
1482MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>");
1483MODULE_AUTHOR("Shawn Tu");
1484MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
1485MODULE_DESCRIPTION("OmniVision OV2740 sensor driver");
1486MODULE_LICENSE("GPL v2");
1487

source code of linux/drivers/media/i2c/ov2740.c