1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2020 Intel Corporation.
3
4 #include <linux/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/nvmem-provider.h>
13 #include <linux/regmap.h>
14 #include <media/v4l2-ctrls.h>
15 #include <media/v4l2-device.h>
16 #include <media/v4l2-fwnode.h>
17
18 #define OV2740_LINK_FREQ_360MHZ 360000000ULL
19 #define OV2740_LINK_FREQ_180MHZ 180000000ULL
20 #define OV2740_SCLK 72000000LL
21 #define OV2740_MCLK 19200000
22 #define OV2740_DATA_LANES 2
23 #define OV2740_RGB_DEPTH 10
24
25 #define OV2740_REG_CHIP_ID 0x300a
26 #define OV2740_CHIP_ID 0x2740
27
28 #define OV2740_REG_MODE_SELECT 0x0100
29 #define OV2740_MODE_STANDBY 0x00
30 #define OV2740_MODE_STREAMING 0x01
31
32 /* vertical-timings from sensor */
33 #define OV2740_REG_VTS 0x380e
34
35 /* horizontal-timings from sensor */
36 #define OV2740_REG_HTS 0x380c
37
38 /* Exposure controls from sensor */
39 #define OV2740_REG_EXPOSURE 0x3500
40 #define OV2740_EXPOSURE_MIN 4
41 #define OV2740_EXPOSURE_MAX_MARGIN 8
42 #define OV2740_EXPOSURE_STEP 1
43
44 /* Analog gain controls from sensor */
45 #define OV2740_REG_ANALOG_GAIN 0x3508
46 #define OV2740_ANAL_GAIN_MIN 128
47 #define OV2740_ANAL_GAIN_MAX 1983
48 #define OV2740_ANAL_GAIN_STEP 1
49
50 /* Digital gain controls from sensor */
51 #define OV2740_REG_MWB_R_GAIN 0x500a
52 #define OV2740_REG_MWB_G_GAIN 0x500c
53 #define OV2740_REG_MWB_B_GAIN 0x500e
54 #define OV2740_DGTL_GAIN_MIN 1024
55 #define OV2740_DGTL_GAIN_MAX 4095
56 #define OV2740_DGTL_GAIN_STEP 1
57 #define OV2740_DGTL_GAIN_DEFAULT 1024
58
59 /* Test Pattern Control */
60 #define OV2740_REG_TEST_PATTERN 0x5040
61 #define OV2740_TEST_PATTERN_ENABLE BIT(7)
62 #define OV2740_TEST_PATTERN_BAR_SHIFT 2
63
64 /* Group Access */
65 #define OV2740_REG_GROUP_ACCESS 0x3208
66 #define OV2740_GROUP_HOLD_START 0x0
67 #define OV2740_GROUP_HOLD_END 0x10
68 #define OV2740_GROUP_HOLD_LAUNCH 0xa0
69
70 /* ISP CTRL00 */
71 #define OV2740_REG_ISP_CTRL00 0x5000
72 /* ISP CTRL01 */
73 #define OV2740_REG_ISP_CTRL01 0x5001
74 /* Customer Addresses: 0x7010 - 0x710F */
75 #define CUSTOMER_USE_OTP_SIZE 0x100
76 /* OTP registers from sensor */
77 #define OV2740_REG_OTP_CUSTOMER 0x7010
78
79 struct nvm_data {
80 struct nvmem_device *nvmem;
81 struct regmap *regmap;
82 char *nvm_buffer;
83 };
84
85 enum {
86 OV2740_LINK_FREQ_360MHZ_INDEX,
87 OV2740_LINK_FREQ_180MHZ_INDEX,
88 };
89
90 struct ov2740_reg {
91 u16 address;
92 u8 val;
93 };
94
95 struct ov2740_reg_list {
96 u32 num_of_regs;
97 const struct ov2740_reg *regs;
98 };
99
100 struct ov2740_link_freq_config {
101 const struct ov2740_reg_list reg_list;
102 };
103
104 struct ov2740_mode {
105 /* Frame width in pixels */
106 u32 width;
107
108 /* Frame height in pixels */
109 u32 height;
110
111 /* Horizontal timining size */
112 u32 hts;
113
114 /* Default vertical timining size */
115 u32 vts_def;
116
117 /* Min vertical timining size */
118 u32 vts_min;
119
120 /* Max vertical timining size */
121 u32 vts_max;
122
123 /* Link frequency needed for this resolution */
124 u32 link_freq_index;
125
126 /* Sensor register settings for this resolution */
127 const struct ov2740_reg_list reg_list;
128 };
129
130 static const struct ov2740_reg mipi_data_rate_720mbps[] = {
131 {0x0302, 0x4b},
132 {0x030d, 0x4b},
133 {0x030e, 0x02},
134 {0x030a, 0x01},
135 {0x0312, 0x11},
136 };
137
138 static const struct ov2740_reg mipi_data_rate_360mbps[] = {
139 {0x0302, 0x4b},
140 {0x0303, 0x01},
141 {0x030d, 0x4b},
142 {0x030e, 0x02},
143 {0x030a, 0x01},
144 {0x0312, 0x11},
145 {0x4837, 0x2c},
146 };
147
148 static const struct ov2740_reg mode_1932x1092_regs_360mhz[] = {
149 {0x3000, 0x00},
150 {0x3018, 0x32},
151 {0x3031, 0x0a},
152 {0x3080, 0x08},
153 {0x3083, 0xB4},
154 {0x3103, 0x00},
155 {0x3104, 0x01},
156 {0x3106, 0x01},
157 {0x3500, 0x00},
158 {0x3501, 0x44},
159 {0x3502, 0x40},
160 {0x3503, 0x88},
161 {0x3507, 0x00},
162 {0x3508, 0x00},
163 {0x3509, 0x80},
164 {0x350c, 0x00},
165 {0x350d, 0x80},
166 {0x3510, 0x00},
167 {0x3511, 0x00},
168 {0x3512, 0x20},
169 {0x3632, 0x00},
170 {0x3633, 0x10},
171 {0x3634, 0x10},
172 {0x3635, 0x10},
173 {0x3645, 0x13},
174 {0x3646, 0x81},
175 {0x3636, 0x10},
176 {0x3651, 0x0a},
177 {0x3656, 0x02},
178 {0x3659, 0x04},
179 {0x365a, 0xda},
180 {0x365b, 0xa2},
181 {0x365c, 0x04},
182 {0x365d, 0x1d},
183 {0x365e, 0x1a},
184 {0x3662, 0xd7},
185 {0x3667, 0x78},
186 {0x3669, 0x0a},
187 {0x366a, 0x92},
188 {0x3700, 0x54},
189 {0x3702, 0x10},
190 {0x3706, 0x42},
191 {0x3709, 0x30},
192 {0x370b, 0xc2},
193 {0x3714, 0x63},
194 {0x3715, 0x01},
195 {0x3716, 0x00},
196 {0x371a, 0x3e},
197 {0x3732, 0x0e},
198 {0x3733, 0x10},
199 {0x375f, 0x0e},
200 {0x3768, 0x30},
201 {0x3769, 0x44},
202 {0x376a, 0x22},
203 {0x377b, 0x20},
204 {0x377c, 0x00},
205 {0x377d, 0x0c},
206 {0x3798, 0x00},
207 {0x37a1, 0x55},
208 {0x37a8, 0x6d},
209 {0x37c2, 0x04},
210 {0x37c5, 0x00},
211 {0x37c8, 0x00},
212 {0x3800, 0x00},
213 {0x3801, 0x00},
214 {0x3802, 0x00},
215 {0x3803, 0x00},
216 {0x3804, 0x07},
217 {0x3805, 0x8f},
218 {0x3806, 0x04},
219 {0x3807, 0x47},
220 {0x3808, 0x07},
221 {0x3809, 0x88},
222 {0x380a, 0x04},
223 {0x380b, 0x40},
224 {0x380c, 0x04},
225 {0x380d, 0x38},
226 {0x380e, 0x04},
227 {0x380f, 0x60},
228 {0x3810, 0x00},
229 {0x3811, 0x04},
230 {0x3812, 0x00},
231 {0x3813, 0x04},
232 {0x3814, 0x01},
233 {0x3815, 0x01},
234 {0x3820, 0x80},
235 {0x3821, 0x46},
236 {0x3822, 0x84},
237 {0x3829, 0x00},
238 {0x382a, 0x01},
239 {0x382b, 0x01},
240 {0x3830, 0x04},
241 {0x3836, 0x01},
242 {0x3837, 0x08},
243 {0x3839, 0x01},
244 {0x383a, 0x00},
245 {0x383b, 0x08},
246 {0x383c, 0x00},
247 {0x3f0b, 0x00},
248 {0x4001, 0x20},
249 {0x4009, 0x07},
250 {0x4003, 0x10},
251 {0x4010, 0xe0},
252 {0x4016, 0x00},
253 {0x4017, 0x10},
254 {0x4044, 0x02},
255 {0x4304, 0x08},
256 {0x4307, 0x30},
257 {0x4320, 0x80},
258 {0x4322, 0x00},
259 {0x4323, 0x00},
260 {0x4324, 0x00},
261 {0x4325, 0x00},
262 {0x4326, 0x00},
263 {0x4327, 0x00},
264 {0x4328, 0x00},
265 {0x4329, 0x00},
266 {0x432c, 0x03},
267 {0x432d, 0x81},
268 {0x4501, 0x84},
269 {0x4502, 0x40},
270 {0x4503, 0x18},
271 {0x4504, 0x04},
272 {0x4508, 0x02},
273 {0x4601, 0x10},
274 {0x4800, 0x00},
275 {0x4816, 0x52},
276 {0x4837, 0x16},
277 {0x5000, 0x7f},
278 {0x5001, 0x00},
279 {0x5005, 0x38},
280 {0x501e, 0x0d},
281 {0x5040, 0x00},
282 {0x5901, 0x00},
283 {0x3800, 0x00},
284 {0x3801, 0x00},
285 {0x3802, 0x00},
286 {0x3803, 0x00},
287 {0x3804, 0x07},
288 {0x3805, 0x8f},
289 {0x3806, 0x04},
290 {0x3807, 0x47},
291 {0x3808, 0x07},
292 {0x3809, 0x8c},
293 {0x380a, 0x04},
294 {0x380b, 0x44},
295 {0x3810, 0x00},
296 {0x3811, 0x00},
297 {0x3812, 0x00},
298 {0x3813, 0x01},
299 };
300
301 static const struct ov2740_reg mode_1932x1092_regs_180mhz[] = {
302 {0x3000, 0x00},
303 {0x3018, 0x32}, /* 0x32 for 2 lanes, 0x12 for 1 lane */
304 {0x3031, 0x0a},
305 {0x3080, 0x08},
306 {0x3083, 0xB4},
307 {0x3103, 0x00},
308 {0x3104, 0x01},
309 {0x3106, 0x01},
310 {0x3500, 0x00},
311 {0x3501, 0x44},
312 {0x3502, 0x40},
313 {0x3503, 0x88},
314 {0x3507, 0x00},
315 {0x3508, 0x00},
316 {0x3509, 0x80},
317 {0x350c, 0x00},
318 {0x350d, 0x80},
319 {0x3510, 0x00},
320 {0x3511, 0x00},
321 {0x3512, 0x20},
322 {0x3632, 0x00},
323 {0x3633, 0x10},
324 {0x3634, 0x10},
325 {0x3635, 0x10},
326 {0x3645, 0x13},
327 {0x3646, 0x81},
328 {0x3636, 0x10},
329 {0x3651, 0x0a},
330 {0x3656, 0x02},
331 {0x3659, 0x04},
332 {0x365a, 0xda},
333 {0x365b, 0xa2},
334 {0x365c, 0x04},
335 {0x365d, 0x1d},
336 {0x365e, 0x1a},
337 {0x3662, 0xd7},
338 {0x3667, 0x78},
339 {0x3669, 0x0a},
340 {0x366a, 0x92},
341 {0x3700, 0x54},
342 {0x3702, 0x10},
343 {0x3706, 0x42},
344 {0x3709, 0x30},
345 {0x370b, 0xc2},
346 {0x3714, 0x63},
347 {0x3715, 0x01},
348 {0x3716, 0x00},
349 {0x371a, 0x3e},
350 {0x3732, 0x0e},
351 {0x3733, 0x10},
352 {0x375f, 0x0e},
353 {0x3768, 0x30},
354 {0x3769, 0x44},
355 {0x376a, 0x22},
356 {0x377b, 0x20},
357 {0x377c, 0x00},
358 {0x377d, 0x0c},
359 {0x3798, 0x00},
360 {0x37a1, 0x55},
361 {0x37a8, 0x6d},
362 {0x37c2, 0x04},
363 {0x37c5, 0x00},
364 {0x37c8, 0x00},
365 {0x3800, 0x00},
366 {0x3801, 0x00},
367 {0x3802, 0x00},
368 {0x3803, 0x00},
369 {0x3804, 0x07},
370 {0x3805, 0x8f},
371 {0x3806, 0x04},
372 {0x3807, 0x47},
373 {0x3808, 0x07},
374 {0x3809, 0x88},
375 {0x380a, 0x04},
376 {0x380b, 0x40},
377 {0x380c, 0x08},
378 {0x380d, 0x70},
379 {0x380e, 0x04},
380 {0x380f, 0x56},
381 {0x3810, 0x00},
382 {0x3811, 0x04},
383 {0x3812, 0x00},
384 {0x3813, 0x04},
385 {0x3814, 0x01},
386 {0x3815, 0x01},
387 {0x3820, 0x80},
388 {0x3821, 0x46},
389 {0x3822, 0x84},
390 {0x3829, 0x00},
391 {0x382a, 0x01},
392 {0x382b, 0x01},
393 {0x3830, 0x04},
394 {0x3836, 0x01},
395 {0x3837, 0x08},
396 {0x3839, 0x01},
397 {0x383a, 0x00},
398 {0x383b, 0x08},
399 {0x383c, 0x00},
400 {0x3f0b, 0x00},
401 {0x4001, 0x20},
402 {0x4009, 0x07},
403 {0x4003, 0x10},
404 {0x4010, 0xe0},
405 {0x4016, 0x00},
406 {0x4017, 0x10},
407 {0x4044, 0x02},
408 {0x4304, 0x08},
409 {0x4307, 0x30},
410 {0x4320, 0x80},
411 {0x4322, 0x00},
412 {0x4323, 0x00},
413 {0x4324, 0x00},
414 {0x4325, 0x00},
415 {0x4326, 0x00},
416 {0x4327, 0x00},
417 {0x4328, 0x00},
418 {0x4329, 0x00},
419 {0x432c, 0x03},
420 {0x432d, 0x81},
421 {0x4501, 0x84},
422 {0x4502, 0x40},
423 {0x4503, 0x18},
424 {0x4504, 0x04},
425 {0x4508, 0x02},
426 {0x4601, 0x10},
427 {0x4800, 0x00},
428 {0x4816, 0x52},
429 {0x5000, 0x73}, /* 0x7f enable DPC */
430 {0x5001, 0x00},
431 {0x5005, 0x38},
432 {0x501e, 0x0d},
433 {0x5040, 0x00},
434 {0x5901, 0x00},
435 {0x3800, 0x00},
436 {0x3801, 0x00},
437 {0x3802, 0x00},
438 {0x3803, 0x00},
439 {0x3804, 0x07},
440 {0x3805, 0x8f},
441 {0x3806, 0x04},
442 {0x3807, 0x47},
443 {0x3808, 0x07},
444 {0x3809, 0x8c},
445 {0x380a, 0x04},
446 {0x380b, 0x44},
447 {0x3810, 0x00},
448 {0x3811, 0x00},
449 {0x3812, 0x00},
450 {0x3813, 0x01},
451 {0x4003, 0x40}, /* set Black level to 0x40 */
452 };
453
454 static const char * const ov2740_test_pattern_menu[] = {
455 "Disabled",
456 "Color Bar",
457 "Top-Bottom Darker Color Bar",
458 "Right-Left Darker Color Bar",
459 "Bottom-Top Darker Color Bar",
460 };
461
462 static const s64 link_freq_menu_items[] = {
463 OV2740_LINK_FREQ_360MHZ,
464 OV2740_LINK_FREQ_180MHZ,
465 };
466
467 static const struct ov2740_link_freq_config link_freq_configs[] = {
468 [OV2740_LINK_FREQ_360MHZ_INDEX] = {
469 .reg_list = {
470 .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
471 .regs = mipi_data_rate_720mbps,
472 }
473 },
474 [OV2740_LINK_FREQ_180MHZ_INDEX] = {
475 .reg_list = {
476 .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps),
477 .regs = mipi_data_rate_360mbps,
478 }
479 },
480 };
481
482 static const struct ov2740_mode supported_modes_360mhz[] = {
483 {
484 .width = 1932,
485 .height = 1092,
486 .hts = 2160,
487 .vts_min = 1120,
488 .vts_def = 2186,
489 .vts_max = 32767,
490 .reg_list = {
491 .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_360mhz),
492 .regs = mode_1932x1092_regs_360mhz,
493 },
494 .link_freq_index = OV2740_LINK_FREQ_360MHZ_INDEX,
495 },
496 };
497
498 static const struct ov2740_mode supported_modes_180mhz[] = {
499 {
500 .width = 1932,
501 .height = 1092,
502 .hts = 2160,
503 .vts_min = 1110,
504 .vts_def = 1110,
505 .vts_max = 2047,
506 .reg_list = {
507 .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_180mhz),
508 .regs = mode_1932x1092_regs_180mhz,
509 },
510 .link_freq_index = OV2740_LINK_FREQ_180MHZ_INDEX,
511 },
512 };
513
514 struct ov2740 {
515 struct v4l2_subdev sd;
516 struct media_pad pad;
517 struct v4l2_ctrl_handler ctrl_handler;
518
519 /* V4L2 Controls */
520 struct v4l2_ctrl *link_freq;
521 struct v4l2_ctrl *pixel_rate;
522 struct v4l2_ctrl *vblank;
523 struct v4l2_ctrl *hblank;
524 struct v4l2_ctrl *exposure;
525
526 /* GPIOs, clocks */
527 struct gpio_desc *reset_gpio;
528 struct clk *clk;
529
530 /* Current mode */
531 const struct ov2740_mode *cur_mode;
532
533 /* NVM data inforamtion */
534 struct nvm_data *nvm;
535
536 /* Supported modes */
537 const struct ov2740_mode *supported_modes;
538 int supported_modes_count;
539
540 /* True if the device has been identified */
541 bool identified;
542 };
543
to_ov2740(struct v4l2_subdev * subdev)544 static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev)
545 {
546 return container_of(subdev, struct ov2740, sd);
547 }
548
to_pixel_rate(u32 f_index)549 static u64 to_pixel_rate(u32 f_index)
550 {
551 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV2740_DATA_LANES;
552
553 do_div(pixel_rate, OV2740_RGB_DEPTH);
554
555 return pixel_rate;
556 }
557
ov2740_read_reg(struct ov2740 * ov2740,u16 reg,u16 len,u32 * val)558 static int ov2740_read_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 *val)
559 {
560 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
561 struct i2c_msg msgs[2];
562 u8 addr_buf[2];
563 u8 data_buf[4] = {0};
564 int ret;
565
566 if (len > sizeof(data_buf))
567 return -EINVAL;
568
569 put_unaligned_be16(reg, addr_buf);
570 msgs[0].addr = client->addr;
571 msgs[0].flags = 0;
572 msgs[0].len = sizeof(addr_buf);
573 msgs[0].buf = addr_buf;
574 msgs[1].addr = client->addr;
575 msgs[1].flags = I2C_M_RD;
576 msgs[1].len = len;
577 msgs[1].buf = &data_buf[sizeof(data_buf) - len];
578
579 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
580 if (ret != ARRAY_SIZE(msgs))
581 return ret < 0 ? ret : -EIO;
582
583 *val = get_unaligned_be32(data_buf);
584
585 return 0;
586 }
587
ov2740_write_reg(struct ov2740 * ov2740,u16 reg,u16 len,u32 val)588 static int ov2740_write_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 val)
589 {
590 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
591 u8 buf[6];
592 int ret;
593
594 if (len > 4)
595 return -EINVAL;
596
597 put_unaligned_be16(reg, buf);
598 put_unaligned_be32(val << 8 * (4 - len), buf + 2);
599
600 ret = i2c_master_send(client, buf, len + 2);
601 if (ret != len + 2)
602 return ret < 0 ? ret : -EIO;
603
604 return 0;
605 }
606
ov2740_write_reg_list(struct ov2740 * ov2740,const struct ov2740_reg_list * r_list)607 static int ov2740_write_reg_list(struct ov2740 *ov2740,
608 const struct ov2740_reg_list *r_list)
609 {
610 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
611 unsigned int i;
612 int ret;
613
614 for (i = 0; i < r_list->num_of_regs; i++) {
615 ret = ov2740_write_reg(ov2740, r_list->regs[i].address, 1,
616 r_list->regs[i].val);
617 if (ret) {
618 dev_err_ratelimited(&client->dev,
619 "write reg 0x%4.4x return err = %d\n",
620 r_list->regs[i].address, ret);
621 return ret;
622 }
623 }
624
625 return 0;
626 }
627
ov2740_identify_module(struct ov2740 * ov2740)628 static int ov2740_identify_module(struct ov2740 *ov2740)
629 {
630 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
631 int ret;
632 u32 val;
633
634 if (ov2740->identified)
635 return 0;
636
637 ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, 3, &val);
638 if (ret)
639 return ret;
640
641 if (val != OV2740_CHIP_ID) {
642 dev_err(&client->dev, "chip id mismatch: %x != %x\n",
643 OV2740_CHIP_ID, val);
644 return -ENXIO;
645 }
646
647 ov2740->identified = true;
648
649 return 0;
650 }
651
ov2740_update_digital_gain(struct ov2740 * ov2740,u32 d_gain)652 static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain)
653 {
654 int ret;
655
656 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
657 OV2740_GROUP_HOLD_START);
658 if (ret)
659 return ret;
660
661 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, 2, d_gain);
662 if (ret)
663 return ret;
664
665 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_G_GAIN, 2, d_gain);
666 if (ret)
667 return ret;
668
669 ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, 2, d_gain);
670 if (ret)
671 return ret;
672
673 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
674 OV2740_GROUP_HOLD_END);
675 if (ret)
676 return ret;
677
678 ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
679 OV2740_GROUP_HOLD_LAUNCH);
680 return ret;
681 }
682
ov2740_test_pattern(struct ov2740 * ov2740,u32 pattern)683 static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern)
684 {
685 if (pattern)
686 pattern = (pattern - 1) << OV2740_TEST_PATTERN_BAR_SHIFT |
687 OV2740_TEST_PATTERN_ENABLE;
688
689 return ov2740_write_reg(ov2740, OV2740_REG_TEST_PATTERN, 1, pattern);
690 }
691
ov2740_set_ctrl(struct v4l2_ctrl * ctrl)692 static int ov2740_set_ctrl(struct v4l2_ctrl *ctrl)
693 {
694 struct ov2740 *ov2740 = container_of(ctrl->handler,
695 struct ov2740, ctrl_handler);
696 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
697 s64 exposure_max;
698 int ret;
699
700 /* Propagate change of current control to all related controls */
701 if (ctrl->id == V4L2_CID_VBLANK) {
702 /* Update max exposure while meeting expected vblanking */
703 exposure_max = ov2740->cur_mode->height + ctrl->val -
704 OV2740_EXPOSURE_MAX_MARGIN;
705 __v4l2_ctrl_modify_range(ov2740->exposure,
706 ov2740->exposure->minimum,
707 exposure_max, ov2740->exposure->step,
708 exposure_max);
709 }
710
711 /* V4L2 controls values will be applied only when power is already up */
712 if (!pm_runtime_get_if_in_use(&client->dev))
713 return 0;
714
715 switch (ctrl->id) {
716 case V4L2_CID_ANALOGUE_GAIN:
717 ret = ov2740_write_reg(ov2740, OV2740_REG_ANALOG_GAIN, 2,
718 ctrl->val);
719 break;
720
721 case V4L2_CID_DIGITAL_GAIN:
722 ret = ov2740_update_digital_gain(ov2740, ctrl->val);
723 break;
724
725 case V4L2_CID_EXPOSURE:
726 /* 4 least significant bits of expsoure are fractional part */
727 ret = ov2740_write_reg(ov2740, OV2740_REG_EXPOSURE, 3,
728 ctrl->val << 4);
729 break;
730
731 case V4L2_CID_VBLANK:
732 ret = ov2740_write_reg(ov2740, OV2740_REG_VTS, 2,
733 ov2740->cur_mode->height + ctrl->val);
734 break;
735
736 case V4L2_CID_TEST_PATTERN:
737 ret = ov2740_test_pattern(ov2740, ctrl->val);
738 break;
739
740 default:
741 ret = -EINVAL;
742 break;
743 }
744
745 pm_runtime_put(&client->dev);
746
747 return ret;
748 }
749
750 static const struct v4l2_ctrl_ops ov2740_ctrl_ops = {
751 .s_ctrl = ov2740_set_ctrl,
752 };
753
ov2740_init_controls(struct ov2740 * ov2740)754 static int ov2740_init_controls(struct ov2740 *ov2740)
755 {
756 struct v4l2_ctrl_handler *ctrl_hdlr;
757 const struct ov2740_mode *cur_mode;
758 s64 exposure_max, h_blank, pixel_rate;
759 u32 vblank_min, vblank_max, vblank_default;
760 int size;
761 int ret;
762
763 ctrl_hdlr = &ov2740->ctrl_handler;
764 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
765 if (ret)
766 return ret;
767
768 cur_mode = ov2740->cur_mode;
769 size = ARRAY_SIZE(link_freq_menu_items);
770
771 ov2740->link_freq =
772 v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov2740_ctrl_ops,
773 V4L2_CID_LINK_FREQ, size - 1,
774 ov2740->supported_modes->link_freq_index,
775 link_freq_menu_items);
776 if (ov2740->link_freq)
777 ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
778
779 pixel_rate = to_pixel_rate(ov2740->supported_modes->link_freq_index);
780 ov2740->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
781 V4L2_CID_PIXEL_RATE, 0,
782 pixel_rate, 1, pixel_rate);
783
784 vblank_min = cur_mode->vts_min - cur_mode->height;
785 vblank_max = cur_mode->vts_max - cur_mode->height;
786 vblank_default = cur_mode->vts_def - cur_mode->height;
787 ov2740->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
788 V4L2_CID_VBLANK, vblank_min,
789 vblank_max, 1, vblank_default);
790
791 h_blank = cur_mode->hts - cur_mode->width;
792 ov2740->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
793 V4L2_CID_HBLANK, h_blank, h_blank, 1,
794 h_blank);
795 if (ov2740->hblank)
796 ov2740->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
797
798 v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
799 OV2740_ANAL_GAIN_MIN, OV2740_ANAL_GAIN_MAX,
800 OV2740_ANAL_GAIN_STEP, OV2740_ANAL_GAIN_MIN);
801 v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
802 OV2740_DGTL_GAIN_MIN, OV2740_DGTL_GAIN_MAX,
803 OV2740_DGTL_GAIN_STEP, OV2740_DGTL_GAIN_DEFAULT);
804 exposure_max = cur_mode->vts_def - OV2740_EXPOSURE_MAX_MARGIN;
805 ov2740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
806 V4L2_CID_EXPOSURE,
807 OV2740_EXPOSURE_MIN, exposure_max,
808 OV2740_EXPOSURE_STEP,
809 exposure_max);
810 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov2740_ctrl_ops,
811 V4L2_CID_TEST_PATTERN,
812 ARRAY_SIZE(ov2740_test_pattern_menu) - 1,
813 0, 0, ov2740_test_pattern_menu);
814 if (ctrl_hdlr->error) {
815 v4l2_ctrl_handler_free(ctrl_hdlr);
816 return ctrl_hdlr->error;
817 }
818
819 ov2740->sd.ctrl_handler = ctrl_hdlr;
820
821 return 0;
822 }
823
ov2740_update_pad_format(const struct ov2740_mode * mode,struct v4l2_mbus_framefmt * fmt)824 static void ov2740_update_pad_format(const struct ov2740_mode *mode,
825 struct v4l2_mbus_framefmt *fmt)
826 {
827 fmt->width = mode->width;
828 fmt->height = mode->height;
829 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
830 fmt->field = V4L2_FIELD_NONE;
831 }
832
ov2740_load_otp_data(struct nvm_data * nvm)833 static int ov2740_load_otp_data(struct nvm_data *nvm)
834 {
835 struct device *dev = regmap_get_device(nvm->regmap);
836 struct ov2740 *ov2740 = to_ov2740(dev_get_drvdata(dev));
837 u32 isp_ctrl00 = 0;
838 u32 isp_ctrl01 = 0;
839 int ret;
840
841 if (nvm->nvm_buffer)
842 return 0;
843
844 nvm->nvm_buffer = kzalloc(CUSTOMER_USE_OTP_SIZE, GFP_KERNEL);
845 if (!nvm->nvm_buffer)
846 return -ENOMEM;
847
848 ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, &isp_ctrl00);
849 if (ret) {
850 dev_err(dev, "failed to read ISP CTRL00\n");
851 goto err;
852 }
853
854 ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01);
855 if (ret) {
856 dev_err(dev, "failed to read ISP CTRL01\n");
857 goto err;
858 }
859
860 /* Clear bit 5 of ISP CTRL00 */
861 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1,
862 isp_ctrl00 & ~BIT(5));
863 if (ret) {
864 dev_err(dev, "failed to set ISP CTRL00\n");
865 goto err;
866 }
867
868 /* Clear bit 7 of ISP CTRL01 */
869 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1,
870 isp_ctrl01 & ~BIT(7));
871 if (ret) {
872 dev_err(dev, "failed to set ISP CTRL01\n");
873 goto err;
874 }
875
876 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
877 OV2740_MODE_STREAMING);
878 if (ret) {
879 dev_err(dev, "failed to set streaming mode\n");
880 goto err;
881 }
882
883 /*
884 * Users are not allowed to access OTP-related registers and memory
885 * during the 20 ms period after streaming starts (0x100 = 0x01).
886 */
887 msleep(20);
888
889 ret = regmap_bulk_read(nvm->regmap, OV2740_REG_OTP_CUSTOMER,
890 nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE);
891 if (ret) {
892 dev_err(dev, "failed to read OTP data, ret %d\n", ret);
893 goto err;
894 }
895
896 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
897 OV2740_MODE_STANDBY);
898 if (ret) {
899 dev_err(dev, "failed to set streaming mode\n");
900 goto err;
901 }
902
903 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01);
904 if (ret) {
905 dev_err(dev, "failed to set ISP CTRL01\n");
906 goto err;
907 }
908
909 ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, isp_ctrl00);
910 if (ret) {
911 dev_err(dev, "failed to set ISP CTRL00\n");
912 goto err;
913 }
914
915 return 0;
916 err:
917 kfree(nvm->nvm_buffer);
918 nvm->nvm_buffer = NULL;
919
920 return ret;
921 }
922
ov2740_start_streaming(struct ov2740 * ov2740)923 static int ov2740_start_streaming(struct ov2740 *ov2740)
924 {
925 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
926 const struct ov2740_reg_list *reg_list;
927 int link_freq_index;
928 int ret;
929
930 ret = ov2740_identify_module(ov2740);
931 if (ret)
932 return ret;
933
934 if (ov2740->nvm)
935 ov2740_load_otp_data(ov2740->nvm);
936
937 /* Reset the sensor */
938 ret = ov2740_write_reg(ov2740, 0x0103, 1, 0x01);
939 if (ret) {
940 dev_err(&client->dev, "failed to reset\n");
941 return ret;
942 }
943
944 usleep_range(10000, 15000);
945
946 link_freq_index = ov2740->cur_mode->link_freq_index;
947 reg_list = &link_freq_configs[link_freq_index].reg_list;
948 ret = ov2740_write_reg_list(ov2740, reg_list);
949 if (ret) {
950 dev_err(&client->dev, "failed to set plls\n");
951 return ret;
952 }
953
954 reg_list = &ov2740->cur_mode->reg_list;
955 ret = ov2740_write_reg_list(ov2740, reg_list);
956 if (ret) {
957 dev_err(&client->dev, "failed to set mode\n");
958 return ret;
959 }
960
961 ret = __v4l2_ctrl_handler_setup(ov2740->sd.ctrl_handler);
962 if (ret)
963 return ret;
964
965 ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
966 OV2740_MODE_STREAMING);
967 if (ret)
968 dev_err(&client->dev, "failed to start streaming\n");
969
970 return ret;
971 }
972
ov2740_stop_streaming(struct ov2740 * ov2740)973 static void ov2740_stop_streaming(struct ov2740 *ov2740)
974 {
975 struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
976
977 if (ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
978 OV2740_MODE_STANDBY))
979 dev_err(&client->dev, "failed to stop streaming\n");
980 }
981
ov2740_set_stream(struct v4l2_subdev * sd,int enable)982 static int ov2740_set_stream(struct v4l2_subdev *sd, int enable)
983 {
984 struct ov2740 *ov2740 = to_ov2740(sd);
985 struct i2c_client *client = v4l2_get_subdevdata(sd);
986 struct v4l2_subdev_state *sd_state;
987 int ret = 0;
988
989 sd_state = v4l2_subdev_lock_and_get_active_state(&ov2740->sd);
990
991 if (enable) {
992 ret = pm_runtime_resume_and_get(&client->dev);
993 if (ret < 0)
994 goto out_unlock;
995
996 ret = ov2740_start_streaming(ov2740);
997 if (ret) {
998 enable = 0;
999 ov2740_stop_streaming(ov2740);
1000 pm_runtime_put(&client->dev);
1001 }
1002 } else {
1003 ov2740_stop_streaming(ov2740);
1004 pm_runtime_put(&client->dev);
1005 }
1006
1007 out_unlock:
1008 v4l2_subdev_unlock_state(sd_state);
1009
1010 return ret;
1011 }
1012
ov2740_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1013 static int ov2740_set_format(struct v4l2_subdev *sd,
1014 struct v4l2_subdev_state *sd_state,
1015 struct v4l2_subdev_format *fmt)
1016 {
1017 struct ov2740 *ov2740 = to_ov2740(sd);
1018 const struct ov2740_mode *mode;
1019 s32 vblank_def, h_blank;
1020
1021 mode = v4l2_find_nearest_size(ov2740->supported_modes,
1022 ov2740->supported_modes_count,
1023 width, height,
1024 fmt->format.width, fmt->format.height);
1025
1026 ov2740_update_pad_format(mode, &fmt->format);
1027 *v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format;
1028
1029 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
1030 return 0;
1031
1032 ov2740->cur_mode = mode;
1033 __v4l2_ctrl_s_ctrl(ov2740->link_freq, mode->link_freq_index);
1034 __v4l2_ctrl_s_ctrl_int64(ov2740->pixel_rate,
1035 to_pixel_rate(mode->link_freq_index));
1036
1037 /* Update limits and set FPS to default */
1038 vblank_def = mode->vts_def - mode->height;
1039 __v4l2_ctrl_modify_range(ov2740->vblank,
1040 mode->vts_min - mode->height,
1041 mode->vts_max - mode->height, 1, vblank_def);
1042 __v4l2_ctrl_s_ctrl(ov2740->vblank, vblank_def);
1043 h_blank = mode->hts - mode->width;
1044 __v4l2_ctrl_modify_range(ov2740->hblank, h_blank, h_blank, 1, h_blank);
1045
1046 return 0;
1047 }
1048
ov2740_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1049 static int ov2740_enum_mbus_code(struct v4l2_subdev *sd,
1050 struct v4l2_subdev_state *sd_state,
1051 struct v4l2_subdev_mbus_code_enum *code)
1052 {
1053 if (code->index > 0)
1054 return -EINVAL;
1055
1056 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1057
1058 return 0;
1059 }
1060
ov2740_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1061 static int ov2740_enum_frame_size(struct v4l2_subdev *sd,
1062 struct v4l2_subdev_state *sd_state,
1063 struct v4l2_subdev_frame_size_enum *fse)
1064 {
1065 struct ov2740 *ov2740 = to_ov2740(sd);
1066 const struct ov2740_mode *supported_modes = ov2740->supported_modes;
1067
1068 if (fse->index >= ov2740->supported_modes_count)
1069 return -EINVAL;
1070
1071 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
1072 return -EINVAL;
1073
1074 fse->min_width = supported_modes[fse->index].width;
1075 fse->max_width = fse->min_width;
1076 fse->min_height = supported_modes[fse->index].height;
1077 fse->max_height = fse->min_height;
1078
1079 return 0;
1080 }
1081
ov2740_init_state(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state)1082 static int ov2740_init_state(struct v4l2_subdev *sd,
1083 struct v4l2_subdev_state *sd_state)
1084 {
1085 struct ov2740 *ov2740 = to_ov2740(sd);
1086
1087 ov2740_update_pad_format(&ov2740->supported_modes[0],
1088 v4l2_subdev_state_get_format(sd_state, 0));
1089 return 0;
1090 }
1091
1092 static const struct v4l2_subdev_video_ops ov2740_video_ops = {
1093 .s_stream = ov2740_set_stream,
1094 };
1095
1096 static const struct v4l2_subdev_pad_ops ov2740_pad_ops = {
1097 .get_fmt = v4l2_subdev_get_fmt,
1098 .set_fmt = ov2740_set_format,
1099 .enum_mbus_code = ov2740_enum_mbus_code,
1100 .enum_frame_size = ov2740_enum_frame_size,
1101 };
1102
1103 static const struct v4l2_subdev_ops ov2740_subdev_ops = {
1104 .video = &ov2740_video_ops,
1105 .pad = &ov2740_pad_ops,
1106 };
1107
1108 static const struct v4l2_subdev_internal_ops ov2740_internal_ops = {
1109 .init_state = ov2740_init_state,
1110 };
1111
1112 static const struct media_entity_operations ov2740_subdev_entity_ops = {
1113 .link_validate = v4l2_subdev_link_validate,
1114 };
1115
ov2740_check_hwcfg(struct device * dev)1116 static int ov2740_check_hwcfg(struct device *dev)
1117 {
1118 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1119 struct ov2740 *ov2740 = to_ov2740(sd);
1120 struct fwnode_handle *ep;
1121 struct fwnode_handle *fwnode = dev_fwnode(dev);
1122 struct v4l2_fwnode_endpoint bus_cfg = {
1123 .bus_type = V4L2_MBUS_CSI2_DPHY
1124 };
1125 u32 mclk;
1126 int ret;
1127 unsigned int i, j;
1128
1129 /*
1130 * Sometimes the fwnode graph is initialized by the bridge driver,
1131 * wait for this.
1132 */
1133 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1134 if (!ep)
1135 return -EPROBE_DEFER;
1136
1137 ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
1138 if (ret) {
1139 fwnode_handle_put(ep);
1140 return dev_err_probe(dev, ret,
1141 "reading clock-frequency property\n");
1142 }
1143
1144 if (mclk != OV2740_MCLK) {
1145 fwnode_handle_put(ep);
1146 return dev_err_probe(dev, -EINVAL,
1147 "external clock %d is not supported\n",
1148 mclk);
1149 }
1150
1151 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1152 fwnode_handle_put(ep);
1153 if (ret)
1154 return dev_err_probe(dev, ret, "parsing endpoint failed\n");
1155
1156 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV2740_DATA_LANES) {
1157 ret = dev_err_probe(dev, -EINVAL,
1158 "number of CSI2 data lanes %d is not supported\n",
1159 bus_cfg.bus.mipi_csi2.num_data_lanes);
1160 goto check_hwcfg_error;
1161 }
1162
1163 if (!bus_cfg.nr_of_link_frequencies) {
1164 ret = dev_err_probe(dev, -EINVAL, "no link frequencies defined\n");
1165 goto check_hwcfg_error;
1166 }
1167
1168 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1169 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1170 if (link_freq_menu_items[i] ==
1171 bus_cfg.link_frequencies[j])
1172 break;
1173 }
1174
1175 if (j == bus_cfg.nr_of_link_frequencies)
1176 continue;
1177
1178 switch (i) {
1179 case OV2740_LINK_FREQ_360MHZ_INDEX:
1180 ov2740->supported_modes = supported_modes_360mhz;
1181 ov2740->supported_modes_count =
1182 ARRAY_SIZE(supported_modes_360mhz);
1183 break;
1184 case OV2740_LINK_FREQ_180MHZ_INDEX:
1185 ov2740->supported_modes = supported_modes_180mhz;
1186 ov2740->supported_modes_count =
1187 ARRAY_SIZE(supported_modes_180mhz);
1188 break;
1189 }
1190
1191 break; /* Prefer modes from first available link-freq */
1192 }
1193
1194 if (!ov2740->supported_modes)
1195 ret = dev_err_probe(dev, -EINVAL,
1196 "no supported link frequencies\n");
1197
1198 check_hwcfg_error:
1199 v4l2_fwnode_endpoint_free(&bus_cfg);
1200
1201 return ret;
1202 }
1203
ov2740_remove(struct i2c_client * client)1204 static void ov2740_remove(struct i2c_client *client)
1205 {
1206 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1207
1208 v4l2_async_unregister_subdev(sd);
1209 media_entity_cleanup(&sd->entity);
1210 v4l2_subdev_cleanup(sd);
1211 v4l2_ctrl_handler_free(sd->ctrl_handler);
1212 pm_runtime_disable(&client->dev);
1213 }
1214
ov2740_nvmem_read(void * priv,unsigned int off,void * val,size_t count)1215 static int ov2740_nvmem_read(void *priv, unsigned int off, void *val,
1216 size_t count)
1217 {
1218 struct nvm_data *nvm = priv;
1219 struct device *dev = regmap_get_device(nvm->regmap);
1220 struct ov2740 *ov2740 = to_ov2740(dev_get_drvdata(dev));
1221 struct v4l2_subdev_state *sd_state;
1222 int ret = 0;
1223
1224 /* Serialise sensor access */
1225 sd_state = v4l2_subdev_lock_and_get_active_state(&ov2740->sd);
1226
1227 if (nvm->nvm_buffer) {
1228 memcpy(val, nvm->nvm_buffer + off, count);
1229 goto exit;
1230 }
1231
1232 ret = pm_runtime_resume_and_get(dev);
1233 if (ret < 0) {
1234 goto exit;
1235 }
1236
1237 ret = ov2740_load_otp_data(nvm);
1238 if (!ret)
1239 memcpy(val, nvm->nvm_buffer + off, count);
1240
1241 pm_runtime_put(dev);
1242 exit:
1243 v4l2_subdev_unlock_state(sd_state);
1244 return ret;
1245 }
1246
ov2740_register_nvmem(struct i2c_client * client,struct ov2740 * ov2740)1247 static int ov2740_register_nvmem(struct i2c_client *client,
1248 struct ov2740 *ov2740)
1249 {
1250 struct nvm_data *nvm;
1251 struct regmap_config regmap_config = { };
1252 struct nvmem_config nvmem_config = { };
1253 struct regmap *regmap;
1254 struct device *dev = &client->dev;
1255
1256 nvm = devm_kzalloc(dev, sizeof(*nvm), GFP_KERNEL);
1257 if (!nvm)
1258 return -ENOMEM;
1259
1260 regmap_config.val_bits = 8;
1261 regmap_config.reg_bits = 16;
1262 regmap_config.disable_locking = true;
1263 regmap = devm_regmap_init_i2c(client, ®map_config);
1264 if (IS_ERR(regmap))
1265 return PTR_ERR(regmap);
1266
1267 nvm->regmap = regmap;
1268
1269 nvmem_config.name = dev_name(dev);
1270 nvmem_config.dev = dev;
1271 nvmem_config.read_only = true;
1272 nvmem_config.root_only = true;
1273 nvmem_config.owner = THIS_MODULE;
1274 nvmem_config.compat = true;
1275 nvmem_config.base_dev = dev;
1276 nvmem_config.reg_read = ov2740_nvmem_read;
1277 nvmem_config.reg_write = NULL;
1278 nvmem_config.priv = nvm;
1279 nvmem_config.stride = 1;
1280 nvmem_config.word_size = 1;
1281 nvmem_config.size = CUSTOMER_USE_OTP_SIZE;
1282
1283 nvm->nvmem = devm_nvmem_register(dev, &nvmem_config);
1284 if (IS_ERR(nvm->nvmem))
1285 return PTR_ERR(nvm->nvmem);
1286
1287 ov2740->nvm = nvm;
1288 return 0;
1289 }
1290
ov2740_suspend(struct device * dev)1291 static int ov2740_suspend(struct device *dev)
1292 {
1293 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1294 struct ov2740 *ov2740 = to_ov2740(sd);
1295
1296 gpiod_set_value_cansleep(ov2740->reset_gpio, 1);
1297 clk_disable_unprepare(ov2740->clk);
1298 return 0;
1299 }
1300
ov2740_resume(struct device * dev)1301 static int ov2740_resume(struct device *dev)
1302 {
1303 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1304 struct ov2740 *ov2740 = to_ov2740(sd);
1305 int ret;
1306
1307 ret = clk_prepare_enable(ov2740->clk);
1308 if (ret)
1309 return ret;
1310
1311 gpiod_set_value_cansleep(ov2740->reset_gpio, 0);
1312 msleep(20);
1313
1314 return 0;
1315 }
1316
ov2740_probe(struct i2c_client * client)1317 static int ov2740_probe(struct i2c_client *client)
1318 {
1319 struct device *dev = &client->dev;
1320 struct ov2740 *ov2740;
1321 bool full_power;
1322 int ret;
1323
1324 ov2740 = devm_kzalloc(&client->dev, sizeof(*ov2740), GFP_KERNEL);
1325 if (!ov2740)
1326 return -ENOMEM;
1327
1328 v4l2_i2c_subdev_init(&ov2740->sd, client, &ov2740_subdev_ops);
1329 ov2740->sd.internal_ops = &ov2740_internal_ops;
1330
1331 ret = ov2740_check_hwcfg(dev);
1332 if (ret)
1333 return dev_err_probe(dev, ret, "failed to check HW configuration\n");
1334
1335 ov2740->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
1336 if (IS_ERR(ov2740->reset_gpio)) {
1337 return dev_err_probe(dev, PTR_ERR(ov2740->reset_gpio),
1338 "failed to get reset GPIO\n");
1339 } else if (ov2740->reset_gpio) {
1340 /*
1341 * Ensure reset is asserted for at least 20 ms before
1342 * ov2740_resume() deasserts it.
1343 */
1344 msleep(20);
1345 }
1346
1347 ov2740->clk = devm_clk_get_optional(dev, "clk");
1348 if (IS_ERR(ov2740->clk))
1349 return dev_err_probe(dev, PTR_ERR(ov2740->clk),
1350 "failed to get clock\n");
1351
1352 full_power = acpi_dev_state_d0(&client->dev);
1353 if (full_power) {
1354 /* ACPI does not always clear the reset GPIO / enable the clock */
1355 ret = ov2740_resume(dev);
1356 if (ret)
1357 return dev_err_probe(dev, ret, "failed to power on sensor\n");
1358
1359 ret = ov2740_identify_module(ov2740);
1360 if (ret) {
1361 dev_err_probe(dev, ret, "failed to find sensor\n");
1362 goto probe_error_power_off;
1363 }
1364 }
1365
1366 ov2740->cur_mode = &ov2740->supported_modes[0];
1367 ret = ov2740_init_controls(ov2740);
1368 if (ret) {
1369 dev_err_probe(dev, ret, "failed to init controls\n");
1370 goto probe_error_v4l2_ctrl_handler_free;
1371 }
1372
1373 ov2740->sd.state_lock = ov2740->ctrl_handler.lock;
1374 ov2740->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1375 ov2740->sd.entity.ops = &ov2740_subdev_entity_ops;
1376 ov2740->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1377 ov2740->pad.flags = MEDIA_PAD_FL_SOURCE;
1378 ret = media_entity_pads_init(&ov2740->sd.entity, 1, &ov2740->pad);
1379 if (ret) {
1380 dev_err_probe(dev, ret, "failed to init entity pads\n");
1381 goto probe_error_v4l2_ctrl_handler_free;
1382 }
1383
1384 ret = v4l2_subdev_init_finalize(&ov2740->sd);
1385 if (ret)
1386 goto probe_error_media_entity_cleanup;
1387
1388 /* Set the device's state to active if it's in D0 state. */
1389 if (full_power)
1390 pm_runtime_set_active(&client->dev);
1391 pm_runtime_enable(&client->dev);
1392 pm_runtime_idle(&client->dev);
1393
1394 ret = v4l2_async_register_subdev_sensor(&ov2740->sd);
1395 if (ret < 0) {
1396 dev_err_probe(dev, ret, "failed to register V4L2 subdev\n");
1397 goto probe_error_v4l2_subdev_cleanup;
1398 }
1399
1400 ret = ov2740_register_nvmem(client, ov2740);
1401 if (ret)
1402 dev_warn(&client->dev, "register nvmem failed, ret %d\n", ret);
1403
1404 return 0;
1405
1406 probe_error_v4l2_subdev_cleanup:
1407 v4l2_subdev_cleanup(&ov2740->sd);
1408
1409 probe_error_media_entity_cleanup:
1410 media_entity_cleanup(&ov2740->sd.entity);
1411 pm_runtime_disable(&client->dev);
1412 pm_runtime_set_suspended(&client->dev);
1413
1414 probe_error_v4l2_ctrl_handler_free:
1415 v4l2_ctrl_handler_free(ov2740->sd.ctrl_handler);
1416
1417 probe_error_power_off:
1418 if (full_power)
1419 ov2740_suspend(dev);
1420
1421 return ret;
1422 }
1423
1424 static DEFINE_RUNTIME_DEV_PM_OPS(ov2740_pm_ops, ov2740_suspend, ov2740_resume,
1425 NULL);
1426
1427 static const struct acpi_device_id ov2740_acpi_ids[] = {
1428 {"INT3474"},
1429 {}
1430 };
1431
1432 MODULE_DEVICE_TABLE(acpi, ov2740_acpi_ids);
1433
1434 static struct i2c_driver ov2740_i2c_driver = {
1435 .driver = {
1436 .name = "ov2740",
1437 .acpi_match_table = ov2740_acpi_ids,
1438 .pm = pm_sleep_ptr(&ov2740_pm_ops),
1439 },
1440 .probe = ov2740_probe,
1441 .remove = ov2740_remove,
1442 .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
1443 };
1444
1445 module_i2c_driver(ov2740_i2c_driver);
1446
1447 MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>");
1448 MODULE_AUTHOR("Shawn Tu");
1449 MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
1450 MODULE_DESCRIPTION("OmniVision OV2740 sensor driver");
1451 MODULE_LICENSE("GPL v2");
1452