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/mod_devicetable.h>
11 #include <linux/module.h>
12 #include <linux/pm_runtime.h>
13 #include <linux/regulator/consumer.h>
14 #include <media/v4l2-ctrls.h>
15 #include <media/v4l2-device.h>
16 #include <media/v4l2-fwnode.h>
17
18 #define OV5675_REG_VALUE_08BIT 1
19 #define OV5675_REG_VALUE_16BIT 2
20 #define OV5675_REG_VALUE_24BIT 3
21
22 #define OV5675_LINK_FREQ_450MHZ 450000000ULL
23 #define OV5675_SCLK 90000000LL
24 #define OV5675_XVCLK_19_2 19200000
25 #define OV5675_DATA_LANES 2
26 #define OV5675_RGB_DEPTH 10
27
28 #define OV5675_REG_CHIP_ID 0x300a
29 #define OV5675_CHIP_ID 0x5675
30
31 #define OV5675_REG_MODE_SELECT 0x0100
32 #define OV5675_MODE_STANDBY 0x00
33 #define OV5675_MODE_STREAMING 0x01
34
35 /* vertical-timings from sensor */
36 #define OV5675_REG_VTS 0x380e
37 #define OV5675_VTS_30FPS 0x07e4
38 #define OV5675_VTS_30FPS_MIN 0x07e4
39 #define OV5675_VTS_MAX 0x7fff
40
41 /* horizontal-timings from sensor */
42 #define OV5675_REG_HTS 0x380c
43
44 /* Exposure controls from sensor */
45 #define OV5675_REG_EXPOSURE 0x3500
46 #define OV5675_EXPOSURE_MIN 4
47 #define OV5675_EXPOSURE_MAX_MARGIN 4
48 #define OV5675_EXPOSURE_STEP 1
49
50 /* Analog gain controls from sensor */
51 #define OV5675_REG_ANALOG_GAIN 0x3508
52 #define OV5675_ANAL_GAIN_MIN 128
53 #define OV5675_ANAL_GAIN_MAX 2047
54 #define OV5675_ANAL_GAIN_STEP 1
55
56 /* Digital gain controls from sensor */
57 #define OV5675_REG_DIGITAL_GAIN 0x350a
58 #define OV5675_REG_MWB_R_GAIN 0x5019
59 #define OV5675_REG_MWB_G_GAIN 0x501b
60 #define OV5675_REG_MWB_B_GAIN 0x501d
61 #define OV5675_DGTL_GAIN_MIN 1024
62 #define OV5675_DGTL_GAIN_MAX 4095
63 #define OV5675_DGTL_GAIN_STEP 1
64 #define OV5675_DGTL_GAIN_DEFAULT 1024
65
66 /* Group Access */
67 #define OV5675_REG_GROUP_ACCESS 0x3208
68 #define OV5675_GROUP_HOLD_START 0x0
69 #define OV5675_GROUP_HOLD_END 0x10
70 #define OV5675_GROUP_HOLD_LAUNCH 0xa0
71
72 /* Test Pattern Control */
73 #define OV5675_REG_TEST_PATTERN 0x4503
74 #define OV5675_TEST_PATTERN_ENABLE BIT(7)
75 #define OV5675_TEST_PATTERN_BAR_SHIFT 2
76
77 /* Flip Mirror Controls from sensor */
78 #define OV5675_REG_FORMAT1 0x3820
79 #define OV5675_REG_FORMAT2 0x373d
80
81 #define to_ov5675(_sd) container_of(_sd, struct ov5675, sd)
82
83 static const char * const ov5675_supply_names[] = {
84 "avdd", /* Analog power */
85 "dovdd", /* Digital I/O power */
86 "dvdd", /* Digital core power */
87 };
88
89 #define OV5675_NUM_SUPPLIES ARRAY_SIZE(ov5675_supply_names)
90
91 enum {
92 OV5675_LINK_FREQ_900MBPS,
93 };
94
95 struct ov5675_reg {
96 u16 address;
97 u8 val;
98 };
99
100 struct ov5675_reg_list {
101 u32 num_of_regs;
102 const struct ov5675_reg *regs;
103 };
104
105 struct ov5675_link_freq_config {
106 const struct ov5675_reg_list reg_list;
107 };
108
109 struct ov5675_mode {
110 /* Frame width in pixels */
111 u32 width;
112
113 /* Frame height in pixels */
114 u32 height;
115
116 /* Horizontal timining size */
117 u32 hts;
118
119 /* Default vertical timining size */
120 u32 vts_def;
121
122 /* Min vertical timining size */
123 u32 vts_min;
124
125 /* Link frequency needed for this resolution */
126 u32 link_freq_index;
127
128 /* Sensor register settings for this resolution */
129 const struct ov5675_reg_list reg_list;
130 };
131
132 static const struct ov5675_reg mipi_data_rate_900mbps[] = {
133 {0x0103, 0x01},
134 {0x0100, 0x00},
135 {0x0300, 0x04},
136 {0x0302, 0x8d},
137 {0x0303, 0x00},
138 {0x030d, 0x26},
139 };
140
141 static const struct ov5675_reg mode_2592x1944_regs[] = {
142 {0x3002, 0x21},
143 {0x3107, 0x23},
144 {0x3501, 0x20},
145 {0x3503, 0x0c},
146 {0x3508, 0x03},
147 {0x3509, 0x00},
148 {0x3600, 0x66},
149 {0x3602, 0x30},
150 {0x3610, 0xa5},
151 {0x3612, 0x93},
152 {0x3620, 0x80},
153 {0x3642, 0x0e},
154 {0x3661, 0x00},
155 {0x3662, 0x10},
156 {0x3664, 0xf3},
157 {0x3665, 0x9e},
158 {0x3667, 0xa5},
159 {0x366e, 0x55},
160 {0x366f, 0x55},
161 {0x3670, 0x11},
162 {0x3671, 0x11},
163 {0x3672, 0x11},
164 {0x3673, 0x11},
165 {0x3714, 0x24},
166 {0x371a, 0x3e},
167 {0x3733, 0x10},
168 {0x3734, 0x00},
169 {0x373d, 0x24},
170 {0x3764, 0x20},
171 {0x3765, 0x20},
172 {0x3766, 0x12},
173 {0x37a1, 0x14},
174 {0x37a8, 0x1c},
175 {0x37ab, 0x0f},
176 {0x37c2, 0x04},
177 {0x37cb, 0x00},
178 {0x37cc, 0x00},
179 {0x37cd, 0x00},
180 {0x37ce, 0x00},
181 {0x37d8, 0x02},
182 {0x37d9, 0x08},
183 {0x37dc, 0x04},
184 {0x3800, 0x00},
185 {0x3801, 0x00},
186 {0x3802, 0x00},
187 {0x3803, 0x04},
188 {0x3804, 0x0a},
189 {0x3805, 0x3f},
190 {0x3806, 0x07},
191 {0x3807, 0xb3},
192 {0x3808, 0x0a},
193 {0x3809, 0x20},
194 {0x380a, 0x07},
195 {0x380b, 0x98},
196 {0x380c, 0x02},
197 {0x380d, 0xee},
198 {0x380e, 0x07},
199 {0x380f, 0xe4},
200 {0x3811, 0x10},
201 {0x3813, 0x0d},
202 {0x3814, 0x01},
203 {0x3815, 0x01},
204 {0x3816, 0x01},
205 {0x3817, 0x01},
206 {0x381e, 0x02},
207 {0x3820, 0x88},
208 {0x3821, 0x01},
209 {0x3832, 0x04},
210 {0x3c80, 0x01},
211 {0x3c82, 0x00},
212 {0x3c83, 0xc8},
213 {0x3c8c, 0x0f},
214 {0x3c8d, 0xa0},
215 {0x3c90, 0x07},
216 {0x3c91, 0x00},
217 {0x3c92, 0x00},
218 {0x3c93, 0x00},
219 {0x3c94, 0xd0},
220 {0x3c95, 0x50},
221 {0x3c96, 0x35},
222 {0x3c97, 0x00},
223 {0x4001, 0xe0},
224 {0x4008, 0x02},
225 {0x4009, 0x0d},
226 {0x400f, 0x80},
227 {0x4013, 0x02},
228 {0x4040, 0x00},
229 {0x4041, 0x07},
230 {0x404c, 0x50},
231 {0x404e, 0x20},
232 {0x4500, 0x06},
233 {0x4503, 0x00},
234 {0x450a, 0x04},
235 {0x4809, 0x04},
236 {0x480c, 0x12},
237 {0x4819, 0x70},
238 {0x4825, 0x32},
239 {0x4826, 0x32},
240 {0x482a, 0x06},
241 {0x4833, 0x08},
242 {0x4837, 0x0d},
243 {0x5000, 0x77},
244 {0x5b00, 0x01},
245 {0x5b01, 0x10},
246 {0x5b02, 0x01},
247 {0x5b03, 0xdb},
248 {0x5b05, 0x6c},
249 {0x5e10, 0xfc},
250 {0x3500, 0x00},
251 {0x3501, 0x3E},
252 {0x3502, 0x60},
253 {0x3503, 0x08},
254 {0x3508, 0x04},
255 {0x3509, 0x00},
256 {0x3832, 0x48},
257 {0x5780, 0x3e},
258 {0x5781, 0x0f},
259 {0x5782, 0x44},
260 {0x5783, 0x02},
261 {0x5784, 0x01},
262 {0x5785, 0x01},
263 {0x5786, 0x00},
264 {0x5787, 0x04},
265 {0x5788, 0x02},
266 {0x5789, 0x0f},
267 {0x578a, 0xfd},
268 {0x578b, 0xf5},
269 {0x578c, 0xf5},
270 {0x578d, 0x03},
271 {0x578e, 0x08},
272 {0x578f, 0x0c},
273 {0x5790, 0x08},
274 {0x5791, 0x06},
275 {0x5792, 0x00},
276 {0x5793, 0x52},
277 {0x5794, 0xa3},
278 {0x4003, 0x40},
279 {0x3107, 0x01},
280 {0x3c80, 0x08},
281 {0x3c83, 0xb1},
282 {0x3c8c, 0x10},
283 {0x3c8d, 0x00},
284 {0x3c90, 0x00},
285 {0x3c94, 0x00},
286 {0x3c95, 0x00},
287 {0x3c96, 0x00},
288 {0x37cb, 0x09},
289 {0x37cc, 0x15},
290 {0x37cd, 0x1f},
291 {0x37ce, 0x1f},
292 };
293
294 static const struct ov5675_reg mode_1296x972_regs[] = {
295 {0x3002, 0x21},
296 {0x3107, 0x23},
297 {0x3501, 0x20},
298 {0x3503, 0x0c},
299 {0x3508, 0x03},
300 {0x3509, 0x00},
301 {0x3600, 0x66},
302 {0x3602, 0x30},
303 {0x3610, 0xa5},
304 {0x3612, 0x93},
305 {0x3620, 0x80},
306 {0x3642, 0x0e},
307 {0x3661, 0x00},
308 {0x3662, 0x08},
309 {0x3664, 0xf3},
310 {0x3665, 0x9e},
311 {0x3667, 0xa5},
312 {0x366e, 0x55},
313 {0x366f, 0x55},
314 {0x3670, 0x11},
315 {0x3671, 0x11},
316 {0x3672, 0x11},
317 {0x3673, 0x11},
318 {0x3714, 0x28},
319 {0x371a, 0x3e},
320 {0x3733, 0x10},
321 {0x3734, 0x00},
322 {0x373d, 0x24},
323 {0x3764, 0x20},
324 {0x3765, 0x20},
325 {0x3766, 0x12},
326 {0x37a1, 0x14},
327 {0x37a8, 0x1c},
328 {0x37ab, 0x0f},
329 {0x37c2, 0x14},
330 {0x37cb, 0x00},
331 {0x37cc, 0x00},
332 {0x37cd, 0x00},
333 {0x37ce, 0x00},
334 {0x37d8, 0x02},
335 {0x37d9, 0x04},
336 {0x37dc, 0x04},
337 {0x3800, 0x00},
338 {0x3801, 0x00},
339 {0x3802, 0x00},
340 {0x3803, 0x00},
341 {0x3804, 0x0a},
342 {0x3805, 0x3f},
343 {0x3806, 0x07},
344 {0x3807, 0xb7},
345 {0x3808, 0x05},
346 {0x3809, 0x10},
347 {0x380a, 0x03},
348 {0x380b, 0xcc},
349 {0x380c, 0x02},
350 {0x380d, 0xee},
351 {0x380e, 0x07},
352 {0x380f, 0xd0},
353 {0x3811, 0x08},
354 {0x3813, 0x0d},
355 {0x3814, 0x03},
356 {0x3815, 0x01},
357 {0x3816, 0x03},
358 {0x3817, 0x01},
359 {0x381e, 0x02},
360 {0x3820, 0x8b},
361 {0x3821, 0x01},
362 {0x3832, 0x04},
363 {0x3c80, 0x01},
364 {0x3c82, 0x00},
365 {0x3c83, 0xc8},
366 {0x3c8c, 0x0f},
367 {0x3c8d, 0xa0},
368 {0x3c90, 0x07},
369 {0x3c91, 0x00},
370 {0x3c92, 0x00},
371 {0x3c93, 0x00},
372 {0x3c94, 0xd0},
373 {0x3c95, 0x50},
374 {0x3c96, 0x35},
375 {0x3c97, 0x00},
376 {0x4001, 0xe0},
377 {0x4008, 0x00},
378 {0x4009, 0x07},
379 {0x400f, 0x80},
380 {0x4013, 0x02},
381 {0x4040, 0x00},
382 {0x4041, 0x03},
383 {0x404c, 0x50},
384 {0x404e, 0x20},
385 {0x4500, 0x06},
386 {0x4503, 0x00},
387 {0x450a, 0x04},
388 {0x4809, 0x04},
389 {0x480c, 0x12},
390 {0x4819, 0x70},
391 {0x4825, 0x32},
392 {0x4826, 0x32},
393 {0x482a, 0x06},
394 {0x4833, 0x08},
395 {0x4837, 0x0d},
396 {0x5000, 0x77},
397 {0x5b00, 0x01},
398 {0x5b01, 0x10},
399 {0x5b02, 0x01},
400 {0x5b03, 0xdb},
401 {0x5b05, 0x6c},
402 {0x5e10, 0xfc},
403 {0x3500, 0x00},
404 {0x3501, 0x1F},
405 {0x3502, 0x20},
406 {0x3503, 0x08},
407 {0x3508, 0x04},
408 {0x3509, 0x00},
409 {0x3832, 0x48},
410 {0x5780, 0x3e},
411 {0x5781, 0x0f},
412 {0x5782, 0x44},
413 {0x5783, 0x02},
414 {0x5784, 0x01},
415 {0x5785, 0x01},
416 {0x5786, 0x00},
417 {0x5787, 0x04},
418 {0x5788, 0x02},
419 {0x5789, 0x0f},
420 {0x578a, 0xfd},
421 {0x578b, 0xf5},
422 {0x578c, 0xf5},
423 {0x578d, 0x03},
424 {0x578e, 0x08},
425 {0x578f, 0x0c},
426 {0x5790, 0x08},
427 {0x5791, 0x06},
428 {0x5792, 0x00},
429 {0x5793, 0x52},
430 {0x5794, 0xa3},
431 {0x4003, 0x40},
432 {0x3107, 0x01},
433 {0x3c80, 0x08},
434 {0x3c83, 0xb1},
435 {0x3c8c, 0x10},
436 {0x3c8d, 0x00},
437 {0x3c90, 0x00},
438 {0x3c94, 0x00},
439 {0x3c95, 0x00},
440 {0x3c96, 0x00},
441 {0x37cb, 0x09},
442 {0x37cc, 0x15},
443 {0x37cd, 0x1f},
444 {0x37ce, 0x1f},
445 };
446
447 static const char * const ov5675_test_pattern_menu[] = {
448 "Disabled",
449 "Standard Color Bar",
450 "Top-Bottom Darker Color Bar",
451 "Right-Left Darker Color Bar",
452 "Bottom-Top Darker Color Bar"
453 };
454
455 static const s64 link_freq_menu_items[] = {
456 OV5675_LINK_FREQ_450MHZ,
457 };
458
459 static const struct ov5675_link_freq_config link_freq_configs[] = {
460 [OV5675_LINK_FREQ_900MBPS] = {
461 .reg_list = {
462 .num_of_regs = ARRAY_SIZE(mipi_data_rate_900mbps),
463 .regs = mipi_data_rate_900mbps,
464 }
465 }
466 };
467
468 static const struct ov5675_mode supported_modes[] = {
469 {
470 .width = 2592,
471 .height = 1944,
472 .hts = 1500,
473 .vts_def = OV5675_VTS_30FPS,
474 .vts_min = OV5675_VTS_30FPS_MIN,
475 .reg_list = {
476 .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs),
477 .regs = mode_2592x1944_regs,
478 },
479 .link_freq_index = OV5675_LINK_FREQ_900MBPS,
480 },
481 {
482 .width = 1296,
483 .height = 972,
484 .hts = 1500,
485 .vts_def = OV5675_VTS_30FPS,
486 .vts_min = OV5675_VTS_30FPS_MIN,
487 .reg_list = {
488 .num_of_regs = ARRAY_SIZE(mode_1296x972_regs),
489 .regs = mode_1296x972_regs,
490 },
491 .link_freq_index = OV5675_LINK_FREQ_900MBPS,
492 }
493 };
494
495 struct ov5675 {
496 struct v4l2_subdev sd;
497 struct media_pad pad;
498 struct v4l2_ctrl_handler ctrl_handler;
499 struct clk *xvclk;
500 struct gpio_desc *reset_gpio;
501 struct regulator_bulk_data supplies[OV5675_NUM_SUPPLIES];
502
503 /* V4L2 Controls */
504 struct v4l2_ctrl *link_freq;
505 struct v4l2_ctrl *pixel_rate;
506 struct v4l2_ctrl *vblank;
507 struct v4l2_ctrl *hblank;
508 struct v4l2_ctrl *exposure;
509
510 /* Current mode */
511 const struct ov5675_mode *cur_mode;
512
513 /* To serialize asynchronus callbacks */
514 struct mutex mutex;
515
516 /* Streaming on/off */
517 bool streaming;
518
519 /* True if the device has been identified */
520 bool identified;
521 };
522
to_pixel_rate(u32 f_index)523 static u64 to_pixel_rate(u32 f_index)
524 {
525 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV5675_DATA_LANES;
526
527 do_div(pixel_rate, OV5675_RGB_DEPTH);
528
529 return pixel_rate;
530 }
531
to_pixels_per_line(u32 hts,u32 f_index)532 static u64 to_pixels_per_line(u32 hts, u32 f_index)
533 {
534 u64 ppl = hts * to_pixel_rate(f_index);
535
536 do_div(ppl, OV5675_SCLK);
537
538 return ppl;
539 }
540
ov5675_read_reg(struct ov5675 * ov5675,u16 reg,u16 len,u32 * val)541 static int ov5675_read_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 *val)
542 {
543 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
544 struct i2c_msg msgs[2];
545 u8 addr_buf[2];
546 u8 data_buf[4] = {0};
547 int ret;
548
549 if (len > 4)
550 return -EINVAL;
551
552 put_unaligned_be16(reg, addr_buf);
553 msgs[0].addr = client->addr;
554 msgs[0].flags = 0;
555 msgs[0].len = sizeof(addr_buf);
556 msgs[0].buf = addr_buf;
557 msgs[1].addr = client->addr;
558 msgs[1].flags = I2C_M_RD;
559 msgs[1].len = len;
560 msgs[1].buf = &data_buf[4 - len];
561
562 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
563 if (ret != ARRAY_SIZE(msgs))
564 return -EIO;
565
566 *val = get_unaligned_be32(data_buf);
567
568 return 0;
569 }
570
ov5675_write_reg(struct ov5675 * ov5675,u16 reg,u16 len,u32 val)571 static int ov5675_write_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 val)
572 {
573 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
574 u8 buf[6];
575
576 if (len > 4)
577 return -EINVAL;
578
579 put_unaligned_be16(reg, buf);
580 put_unaligned_be32(val << 8 * (4 - len), buf + 2);
581 if (i2c_master_send(client, buf, len + 2) != len + 2)
582 return -EIO;
583
584 return 0;
585 }
586
ov5675_write_reg_list(struct ov5675 * ov5675,const struct ov5675_reg_list * r_list)587 static int ov5675_write_reg_list(struct ov5675 *ov5675,
588 const struct ov5675_reg_list *r_list)
589 {
590 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
591 unsigned int i;
592 int ret;
593
594 for (i = 0; i < r_list->num_of_regs; i++) {
595 ret = ov5675_write_reg(ov5675, r_list->regs[i].address, 1,
596 r_list->regs[i].val);
597 if (ret) {
598 dev_err_ratelimited(&client->dev,
599 "failed to write reg 0x%4.4x. error = %d",
600 r_list->regs[i].address, ret);
601 return ret;
602 }
603 }
604
605 return 0;
606 }
607
ov5675_update_digital_gain(struct ov5675 * ov5675,u32 d_gain)608 static int ov5675_update_digital_gain(struct ov5675 *ov5675, u32 d_gain)
609 {
610 int ret;
611
612 ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS,
613 OV5675_REG_VALUE_08BIT,
614 OV5675_GROUP_HOLD_START);
615 if (ret)
616 return ret;
617
618 ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_R_GAIN,
619 OV5675_REG_VALUE_16BIT, d_gain);
620 if (ret)
621 return ret;
622
623 ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_G_GAIN,
624 OV5675_REG_VALUE_16BIT, d_gain);
625 if (ret)
626 return ret;
627
628 ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_B_GAIN,
629 OV5675_REG_VALUE_16BIT, d_gain);
630 if (ret)
631 return ret;
632
633 ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS,
634 OV5675_REG_VALUE_08BIT,
635 OV5675_GROUP_HOLD_END);
636 if (ret)
637 return ret;
638
639 ret = ov5675_write_reg(ov5675, OV5675_REG_GROUP_ACCESS,
640 OV5675_REG_VALUE_08BIT,
641 OV5675_GROUP_HOLD_LAUNCH);
642 return ret;
643 }
644
ov5675_test_pattern(struct ov5675 * ov5675,u32 pattern)645 static int ov5675_test_pattern(struct ov5675 *ov5675, u32 pattern)
646 {
647 if (pattern)
648 pattern = (pattern - 1) << OV5675_TEST_PATTERN_BAR_SHIFT |
649 OV5675_TEST_PATTERN_ENABLE;
650
651 return ov5675_write_reg(ov5675, OV5675_REG_TEST_PATTERN,
652 OV5675_REG_VALUE_08BIT, pattern);
653 }
654
655 /*
656 * OV5675 supports keeping the pixel order by mirror and flip function
657 * The Bayer order isn't affected by the flip controls
658 */
ov5675_set_ctrl_hflip(struct ov5675 * ov5675,u32 ctrl_val)659 static int ov5675_set_ctrl_hflip(struct ov5675 *ov5675, u32 ctrl_val)
660 {
661 int ret;
662 u32 val;
663
664 ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT1,
665 OV5675_REG_VALUE_08BIT, &val);
666 if (ret)
667 return ret;
668
669 return ov5675_write_reg(ov5675, OV5675_REG_FORMAT1,
670 OV5675_REG_VALUE_08BIT,
671 ctrl_val ? val & ~BIT(3) : val | BIT(3));
672 }
673
ov5675_set_ctrl_vflip(struct ov5675 * ov5675,u8 ctrl_val)674 static int ov5675_set_ctrl_vflip(struct ov5675 *ov5675, u8 ctrl_val)
675 {
676 int ret;
677 u32 val;
678
679 ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT1,
680 OV5675_REG_VALUE_08BIT, &val);
681 if (ret)
682 return ret;
683
684 ret = ov5675_write_reg(ov5675, OV5675_REG_FORMAT1,
685 OV5675_REG_VALUE_08BIT,
686 ctrl_val ? val | BIT(4) | BIT(5) : val & ~BIT(4) & ~BIT(5));
687
688 if (ret)
689 return ret;
690
691 ret = ov5675_read_reg(ov5675, OV5675_REG_FORMAT2,
692 OV5675_REG_VALUE_08BIT, &val);
693
694 if (ret)
695 return ret;
696
697 return ov5675_write_reg(ov5675, OV5675_REG_FORMAT2,
698 OV5675_REG_VALUE_08BIT,
699 ctrl_val ? val | BIT(1) : val & ~BIT(1));
700 }
701
ov5675_set_ctrl(struct v4l2_ctrl * ctrl)702 static int ov5675_set_ctrl(struct v4l2_ctrl *ctrl)
703 {
704 struct ov5675 *ov5675 = container_of(ctrl->handler,
705 struct ov5675, ctrl_handler);
706 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
707 s64 exposure_max;
708 int ret = 0;
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 = ov5675->cur_mode->height + ctrl->val -
714 OV5675_EXPOSURE_MAX_MARGIN;
715 __v4l2_ctrl_modify_range(ov5675->exposure,
716 ov5675->exposure->minimum,
717 exposure_max, ov5675->exposure->step,
718 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(&client->dev))
723 return 0;
724
725 switch (ctrl->id) {
726 case V4L2_CID_ANALOGUE_GAIN:
727 ret = ov5675_write_reg(ov5675, OV5675_REG_ANALOG_GAIN,
728 OV5675_REG_VALUE_16BIT, ctrl->val);
729 break;
730
731 case V4L2_CID_DIGITAL_GAIN:
732 ret = ov5675_update_digital_gain(ov5675, ctrl->val);
733 break;
734
735 case V4L2_CID_EXPOSURE:
736 /* 4 least significant bits of expsoure are fractional part
737 * val = val << 4
738 * for ov5675, the unit of exposure is differnt from other
739 * OmniVision sensors, its exposure value is twice of the
740 * register value, the exposure should be divided by 2 before
741 * set register, e.g. val << 3.
742 */
743 ret = ov5675_write_reg(ov5675, OV5675_REG_EXPOSURE,
744 OV5675_REG_VALUE_24BIT, ctrl->val << 3);
745 break;
746
747 case V4L2_CID_VBLANK:
748 ret = ov5675_write_reg(ov5675, OV5675_REG_VTS,
749 OV5675_REG_VALUE_16BIT,
750 ov5675->cur_mode->height + ctrl->val +
751 10);
752 break;
753
754 case V4L2_CID_TEST_PATTERN:
755 ret = ov5675_test_pattern(ov5675, ctrl->val);
756 break;
757
758 case V4L2_CID_HFLIP:
759 ov5675_set_ctrl_hflip(ov5675, ctrl->val);
760 break;
761
762 case V4L2_CID_VFLIP:
763 ov5675_set_ctrl_vflip(ov5675, ctrl->val);
764 break;
765
766 default:
767 ret = -EINVAL;
768 break;
769 }
770
771 pm_runtime_put(&client->dev);
772
773 return ret;
774 }
775
776 static const struct v4l2_ctrl_ops ov5675_ctrl_ops = {
777 .s_ctrl = ov5675_set_ctrl,
778 };
779
ov5675_init_controls(struct ov5675 * ov5675)780 static int ov5675_init_controls(struct ov5675 *ov5675)
781 {
782 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
783 struct v4l2_fwnode_device_properties props;
784 struct v4l2_ctrl_handler *ctrl_hdlr;
785 s64 exposure_max, h_blank;
786 int ret;
787
788 ctrl_hdlr = &ov5675->ctrl_handler;
789 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
790 if (ret)
791 return ret;
792
793 ctrl_hdlr->lock = &ov5675->mutex;
794 ov5675->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov5675_ctrl_ops,
795 V4L2_CID_LINK_FREQ,
796 ARRAY_SIZE(link_freq_menu_items) - 1,
797 0, link_freq_menu_items);
798 if (ov5675->link_freq)
799 ov5675->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
800
801 ov5675->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
802 V4L2_CID_PIXEL_RATE, 0,
803 to_pixel_rate(OV5675_LINK_FREQ_900MBPS),
804 1,
805 to_pixel_rate(OV5675_LINK_FREQ_900MBPS));
806 ov5675->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
807 V4L2_CID_VBLANK,
808 ov5675->cur_mode->vts_min - ov5675->cur_mode->height,
809 OV5675_VTS_MAX - ov5675->cur_mode->height, 1,
810 ov5675->cur_mode->vts_def - ov5675->cur_mode->height);
811 h_blank = to_pixels_per_line(ov5675->cur_mode->hts,
812 ov5675->cur_mode->link_freq_index) - ov5675->cur_mode->width;
813 ov5675->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
814 V4L2_CID_HBLANK, h_blank, h_blank, 1,
815 h_blank);
816 if (ov5675->hblank)
817 ov5675->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
818
819 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
820 OV5675_ANAL_GAIN_MIN, OV5675_ANAL_GAIN_MAX,
821 OV5675_ANAL_GAIN_STEP, OV5675_ANAL_GAIN_MIN);
822 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
823 OV5675_DGTL_GAIN_MIN, OV5675_DGTL_GAIN_MAX,
824 OV5675_DGTL_GAIN_STEP, OV5675_DGTL_GAIN_DEFAULT);
825 exposure_max = (ov5675->cur_mode->vts_def - OV5675_EXPOSURE_MAX_MARGIN);
826 ov5675->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
827 V4L2_CID_EXPOSURE,
828 OV5675_EXPOSURE_MIN, exposure_max,
829 OV5675_EXPOSURE_STEP,
830 exposure_max);
831 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov5675_ctrl_ops,
832 V4L2_CID_TEST_PATTERN,
833 ARRAY_SIZE(ov5675_test_pattern_menu) - 1,
834 0, 0, ov5675_test_pattern_menu);
835 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
836 V4L2_CID_HFLIP, 0, 1, 1, 0);
837 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops,
838 V4L2_CID_VFLIP, 0, 1, 1, 0);
839
840 if (ctrl_hdlr->error) {
841 v4l2_ctrl_handler_free(ctrl_hdlr);
842 return ctrl_hdlr->error;
843 }
844
845 ret = v4l2_fwnode_device_parse(&client->dev, &props);
846 if (ret)
847 goto error;
848
849 ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov5675_ctrl_ops,
850 &props);
851 if (ret)
852 goto error;
853
854 ov5675->sd.ctrl_handler = ctrl_hdlr;
855
856 return 0;
857
858 error:
859 v4l2_ctrl_handler_free(ctrl_hdlr);
860
861 return ret;
862 }
863
ov5675_update_pad_format(const struct ov5675_mode * mode,struct v4l2_mbus_framefmt * fmt)864 static void ov5675_update_pad_format(const struct ov5675_mode *mode,
865 struct v4l2_mbus_framefmt *fmt)
866 {
867 fmt->width = mode->width;
868 fmt->height = mode->height;
869 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
870 fmt->field = V4L2_FIELD_NONE;
871 }
872
ov5675_identify_module(struct ov5675 * ov5675)873 static int ov5675_identify_module(struct ov5675 *ov5675)
874 {
875 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
876 int ret;
877 u32 val;
878
879 if (ov5675->identified)
880 return 0;
881
882 ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID,
883 OV5675_REG_VALUE_24BIT, &val);
884 if (ret)
885 return ret;
886
887 if (val != OV5675_CHIP_ID) {
888 dev_err(&client->dev, "chip id mismatch: %x!=%x",
889 OV5675_CHIP_ID, val);
890 return -ENXIO;
891 }
892
893 ov5675->identified = true;
894
895 return 0;
896 }
897
ov5675_start_streaming(struct ov5675 * ov5675)898 static int ov5675_start_streaming(struct ov5675 *ov5675)
899 {
900 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
901 const struct ov5675_reg_list *reg_list;
902 int link_freq_index, ret;
903
904 ret = ov5675_identify_module(ov5675);
905 if (ret)
906 return ret;
907
908 link_freq_index = ov5675->cur_mode->link_freq_index;
909 reg_list = &link_freq_configs[link_freq_index].reg_list;
910 ret = ov5675_write_reg_list(ov5675, reg_list);
911 if (ret) {
912 dev_err(&client->dev, "failed to set plls");
913 return ret;
914 }
915
916 reg_list = &ov5675->cur_mode->reg_list;
917 ret = ov5675_write_reg_list(ov5675, reg_list);
918 if (ret) {
919 dev_err(&client->dev, "failed to set mode");
920 return ret;
921 }
922
923 ret = __v4l2_ctrl_handler_setup(ov5675->sd.ctrl_handler);
924 if (ret)
925 return ret;
926
927 ret = ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT,
928 OV5675_REG_VALUE_08BIT, OV5675_MODE_STREAMING);
929 if (ret) {
930 dev_err(&client->dev, "failed to set stream");
931 return ret;
932 }
933
934 return 0;
935 }
936
ov5675_stop_streaming(struct ov5675 * ov5675)937 static void ov5675_stop_streaming(struct ov5675 *ov5675)
938 {
939 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
940
941 if (ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT,
942 OV5675_REG_VALUE_08BIT, OV5675_MODE_STANDBY))
943 dev_err(&client->dev, "failed to set stream");
944 }
945
ov5675_set_stream(struct v4l2_subdev * sd,int enable)946 static int ov5675_set_stream(struct v4l2_subdev *sd, int enable)
947 {
948 struct ov5675 *ov5675 = to_ov5675(sd);
949 struct i2c_client *client = v4l2_get_subdevdata(sd);
950 int ret = 0;
951
952 if (ov5675->streaming == enable)
953 return 0;
954
955 mutex_lock(&ov5675->mutex);
956 if (enable) {
957 ret = pm_runtime_resume_and_get(&client->dev);
958 if (ret < 0) {
959 mutex_unlock(&ov5675->mutex);
960 return ret;
961 }
962
963 ret = ov5675_start_streaming(ov5675);
964 if (ret) {
965 enable = 0;
966 ov5675_stop_streaming(ov5675);
967 pm_runtime_put(&client->dev);
968 }
969 } else {
970 ov5675_stop_streaming(ov5675);
971 pm_runtime_put(&client->dev);
972 }
973
974 ov5675->streaming = enable;
975 mutex_unlock(&ov5675->mutex);
976
977 return ret;
978 }
979
ov5675_power_off(struct device * dev)980 static int ov5675_power_off(struct device *dev)
981 {
982 /* 512 xvclk cycles after the last SCCB transation or MIPI frame end */
983 u32 delay_us = DIV_ROUND_UP(512, OV5675_XVCLK_19_2 / 1000 / 1000);
984 struct v4l2_subdev *sd = dev_get_drvdata(dev);
985 struct ov5675 *ov5675 = to_ov5675(sd);
986
987 usleep_range(delay_us, delay_us * 2);
988
989 clk_disable_unprepare(ov5675->xvclk);
990 gpiod_set_value_cansleep(ov5675->reset_gpio, 1);
991 regulator_bulk_disable(OV5675_NUM_SUPPLIES, ov5675->supplies);
992
993 return 0;
994 }
995
ov5675_power_on(struct device * dev)996 static int ov5675_power_on(struct device *dev)
997 {
998 u32 delay_us = DIV_ROUND_UP(8192, OV5675_XVCLK_19_2 / 1000 / 1000);
999 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1000 struct ov5675 *ov5675 = to_ov5675(sd);
1001 int ret;
1002
1003 ret = clk_prepare_enable(ov5675->xvclk);
1004 if (ret < 0) {
1005 dev_err(dev, "failed to enable xvclk: %d\n", ret);
1006 return ret;
1007 }
1008
1009 gpiod_set_value_cansleep(ov5675->reset_gpio, 1);
1010
1011 ret = regulator_bulk_enable(OV5675_NUM_SUPPLIES, ov5675->supplies);
1012 if (ret) {
1013 clk_disable_unprepare(ov5675->xvclk);
1014 return ret;
1015 }
1016
1017 /* Reset pulse should be at least 2ms and reset gpio released only once
1018 * regulators are stable.
1019 */
1020 usleep_range(2000, 2200);
1021
1022 gpiod_set_value_cansleep(ov5675->reset_gpio, 0);
1023
1024 /* 8192 xvclk cycles prior to the first SCCB transation */
1025 usleep_range(delay_us, delay_us * 2);
1026
1027 return 0;
1028 }
1029
ov5675_suspend(struct device * dev)1030 static int __maybe_unused ov5675_suspend(struct device *dev)
1031 {
1032 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1033 struct ov5675 *ov5675 = to_ov5675(sd);
1034
1035 mutex_lock(&ov5675->mutex);
1036 if (ov5675->streaming)
1037 ov5675_stop_streaming(ov5675);
1038
1039 mutex_unlock(&ov5675->mutex);
1040
1041 return 0;
1042 }
1043
ov5675_resume(struct device * dev)1044 static int __maybe_unused ov5675_resume(struct device *dev)
1045 {
1046 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1047 struct ov5675 *ov5675 = to_ov5675(sd);
1048 int ret;
1049
1050 mutex_lock(&ov5675->mutex);
1051 if (ov5675->streaming) {
1052 ret = ov5675_start_streaming(ov5675);
1053 if (ret) {
1054 ov5675->streaming = false;
1055 ov5675_stop_streaming(ov5675);
1056 mutex_unlock(&ov5675->mutex);
1057 return ret;
1058 }
1059 }
1060
1061 mutex_unlock(&ov5675->mutex);
1062
1063 return 0;
1064 }
1065
ov5675_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1066 static int ov5675_set_format(struct v4l2_subdev *sd,
1067 struct v4l2_subdev_state *sd_state,
1068 struct v4l2_subdev_format *fmt)
1069 {
1070 struct ov5675 *ov5675 = to_ov5675(sd);
1071 const struct ov5675_mode *mode;
1072 s32 vblank_def, h_blank;
1073
1074 mode = v4l2_find_nearest_size(supported_modes,
1075 ARRAY_SIZE(supported_modes), width,
1076 height, fmt->format.width,
1077 fmt->format.height);
1078
1079 mutex_lock(&ov5675->mutex);
1080 ov5675_update_pad_format(mode, &fmt->format);
1081 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1082 *v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
1083 } else {
1084 ov5675->cur_mode = mode;
1085 __v4l2_ctrl_s_ctrl(ov5675->link_freq, mode->link_freq_index);
1086 __v4l2_ctrl_s_ctrl_int64(ov5675->pixel_rate,
1087 to_pixel_rate(mode->link_freq_index));
1088
1089 /* Update limits and set FPS to default */
1090 vblank_def = mode->vts_def - mode->height;
1091 __v4l2_ctrl_modify_range(ov5675->vblank,
1092 mode->vts_min - mode->height,
1093 OV5675_VTS_MAX - mode->height, 1,
1094 vblank_def);
1095 __v4l2_ctrl_s_ctrl(ov5675->vblank, vblank_def);
1096 h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) -
1097 mode->width;
1098 __v4l2_ctrl_modify_range(ov5675->hblank, h_blank, h_blank, 1,
1099 h_blank);
1100 }
1101
1102 mutex_unlock(&ov5675->mutex);
1103
1104 return 0;
1105 }
1106
ov5675_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1107 static int ov5675_get_format(struct v4l2_subdev *sd,
1108 struct v4l2_subdev_state *sd_state,
1109 struct v4l2_subdev_format *fmt)
1110 {
1111 struct ov5675 *ov5675 = to_ov5675(sd);
1112
1113 mutex_lock(&ov5675->mutex);
1114 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
1115 fmt->format = *v4l2_subdev_get_try_format(&ov5675->sd,
1116 sd_state,
1117 fmt->pad);
1118 else
1119 ov5675_update_pad_format(ov5675->cur_mode, &fmt->format);
1120
1121 mutex_unlock(&ov5675->mutex);
1122
1123 return 0;
1124 }
1125
ov5675_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * state,struct v4l2_subdev_selection * sel)1126 static int ov5675_get_selection(struct v4l2_subdev *sd,
1127 struct v4l2_subdev_state *state,
1128 struct v4l2_subdev_selection *sel)
1129 {
1130 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
1131 return -EINVAL;
1132
1133 switch (sel->target) {
1134 case V4L2_SEL_TGT_CROP_BOUNDS:
1135 sel->r.top = 0;
1136 sel->r.left = 0;
1137 sel->r.width = 2624;
1138 sel->r.height = 2000;
1139 return 0;
1140 case V4L2_SEL_TGT_CROP:
1141 case V4L2_SEL_TGT_CROP_DEFAULT:
1142 sel->r.top = 16;
1143 sel->r.left = 16;
1144 sel->r.width = 2592;
1145 sel->r.height = 1944;
1146 return 0;
1147 }
1148 return -EINVAL;
1149 }
1150
ov5675_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1151 static int ov5675_enum_mbus_code(struct v4l2_subdev *sd,
1152 struct v4l2_subdev_state *sd_state,
1153 struct v4l2_subdev_mbus_code_enum *code)
1154 {
1155 if (code->index > 0)
1156 return -EINVAL;
1157
1158 code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
1159
1160 return 0;
1161 }
1162
ov5675_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1163 static int ov5675_enum_frame_size(struct v4l2_subdev *sd,
1164 struct v4l2_subdev_state *sd_state,
1165 struct v4l2_subdev_frame_size_enum *fse)
1166 {
1167 if (fse->index >= ARRAY_SIZE(supported_modes))
1168 return -EINVAL;
1169
1170 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
1171 return -EINVAL;
1172
1173 fse->min_width = supported_modes[fse->index].width;
1174 fse->max_width = fse->min_width;
1175 fse->min_height = supported_modes[fse->index].height;
1176 fse->max_height = fse->min_height;
1177
1178 return 0;
1179 }
1180
ov5675_open(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)1181 static int ov5675_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1182 {
1183 struct ov5675 *ov5675 = to_ov5675(sd);
1184
1185 mutex_lock(&ov5675->mutex);
1186 ov5675_update_pad_format(&supported_modes[0],
1187 v4l2_subdev_get_try_format(sd, fh->state, 0));
1188 mutex_unlock(&ov5675->mutex);
1189
1190 return 0;
1191 }
1192
1193 static const struct v4l2_subdev_video_ops ov5675_video_ops = {
1194 .s_stream = ov5675_set_stream,
1195 };
1196
1197 static const struct v4l2_subdev_pad_ops ov5675_pad_ops = {
1198 .set_fmt = ov5675_set_format,
1199 .get_fmt = ov5675_get_format,
1200 .get_selection = ov5675_get_selection,
1201 .enum_mbus_code = ov5675_enum_mbus_code,
1202 .enum_frame_size = ov5675_enum_frame_size,
1203 };
1204
1205 static const struct v4l2_subdev_ops ov5675_subdev_ops = {
1206 .video = &ov5675_video_ops,
1207 .pad = &ov5675_pad_ops,
1208 };
1209
1210 static const struct media_entity_operations ov5675_subdev_entity_ops = {
1211 .link_validate = v4l2_subdev_link_validate,
1212 };
1213
1214 static const struct v4l2_subdev_internal_ops ov5675_internal_ops = {
1215 .open = ov5675_open,
1216 };
1217
ov5675_get_hwcfg(struct ov5675 * ov5675,struct device * dev)1218 static int ov5675_get_hwcfg(struct ov5675 *ov5675, struct device *dev)
1219 {
1220 struct fwnode_handle *ep;
1221 struct fwnode_handle *fwnode = dev_fwnode(dev);
1222 struct v4l2_fwnode_endpoint bus_cfg = {
1223 .bus_type = V4L2_MBUS_CSI2_DPHY
1224 };
1225 u32 xvclk_rate;
1226 int ret;
1227 unsigned int i, j;
1228
1229 if (!fwnode)
1230 return -ENXIO;
1231
1232 ov5675->xvclk = devm_clk_get_optional(dev, NULL);
1233 if (IS_ERR(ov5675->xvclk))
1234 return dev_err_probe(dev, PTR_ERR(ov5675->xvclk),
1235 "failed to get xvclk: %ld\n",
1236 PTR_ERR(ov5675->xvclk));
1237
1238 if (ov5675->xvclk) {
1239 xvclk_rate = clk_get_rate(ov5675->xvclk);
1240 } else {
1241 ret = fwnode_property_read_u32(fwnode, "clock-frequency",
1242 &xvclk_rate);
1243
1244 if (ret) {
1245 dev_err(dev, "can't get clock frequency");
1246 return ret;
1247 }
1248 }
1249
1250 if (xvclk_rate != OV5675_XVCLK_19_2) {
1251 dev_err(dev, "external clock rate %u is unsupported",
1252 xvclk_rate);
1253 return -EINVAL;
1254 }
1255
1256 ov5675->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1257 GPIOD_OUT_HIGH);
1258 if (IS_ERR(ov5675->reset_gpio)) {
1259 ret = PTR_ERR(ov5675->reset_gpio);
1260 dev_err(dev, "failed to get reset-gpios: %d\n", ret);
1261 return ret;
1262 }
1263
1264 for (i = 0; i < OV5675_NUM_SUPPLIES; i++)
1265 ov5675->supplies[i].supply = ov5675_supply_names[i];
1266
1267 ret = devm_regulator_bulk_get(dev, OV5675_NUM_SUPPLIES,
1268 ov5675->supplies);
1269 if (ret)
1270 return ret;
1271
1272 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1273 if (!ep)
1274 return -ENXIO;
1275
1276 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1277 fwnode_handle_put(ep);
1278 if (ret)
1279 return ret;
1280
1281 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV5675_DATA_LANES) {
1282 dev_err(dev, "number of CSI2 data lanes %d is not supported",
1283 bus_cfg.bus.mipi_csi2.num_data_lanes);
1284 ret = -EINVAL;
1285 goto check_hwcfg_error;
1286 }
1287
1288 if (!bus_cfg.nr_of_link_frequencies) {
1289 dev_err(dev, "no link frequencies defined");
1290 ret = -EINVAL;
1291 goto check_hwcfg_error;
1292 }
1293
1294 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
1295 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
1296 if (link_freq_menu_items[i] ==
1297 bus_cfg.link_frequencies[j])
1298 break;
1299 }
1300
1301 if (j == bus_cfg.nr_of_link_frequencies) {
1302 dev_err(dev, "no link frequency %lld supported",
1303 link_freq_menu_items[i]);
1304 ret = -EINVAL;
1305 goto check_hwcfg_error;
1306 }
1307 }
1308
1309 check_hwcfg_error:
1310 v4l2_fwnode_endpoint_free(&bus_cfg);
1311
1312 return ret;
1313 }
1314
ov5675_remove(struct i2c_client * client)1315 static void ov5675_remove(struct i2c_client *client)
1316 {
1317 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1318 struct ov5675 *ov5675 = to_ov5675(sd);
1319
1320 v4l2_async_unregister_subdev(sd);
1321 media_entity_cleanup(&sd->entity);
1322 v4l2_ctrl_handler_free(sd->ctrl_handler);
1323 pm_runtime_disable(&client->dev);
1324 mutex_destroy(&ov5675->mutex);
1325
1326 if (!pm_runtime_status_suspended(&client->dev))
1327 ov5675_power_off(&client->dev);
1328 pm_runtime_set_suspended(&client->dev);
1329 }
1330
ov5675_probe(struct i2c_client * client)1331 static int ov5675_probe(struct i2c_client *client)
1332 {
1333 struct ov5675 *ov5675;
1334 bool full_power;
1335 int ret;
1336
1337 ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL);
1338 if (!ov5675)
1339 return -ENOMEM;
1340
1341 ret = ov5675_get_hwcfg(ov5675, &client->dev);
1342 if (ret) {
1343 dev_err(&client->dev, "failed to get HW configuration: %d",
1344 ret);
1345 return ret;
1346 }
1347
1348 v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops);
1349
1350 ret = ov5675_power_on(&client->dev);
1351 if (ret) {
1352 dev_err(&client->dev, "failed to power on: %d\n", ret);
1353 return ret;
1354 }
1355
1356 full_power = acpi_dev_state_d0(&client->dev);
1357 if (full_power) {
1358 ret = ov5675_identify_module(ov5675);
1359 if (ret) {
1360 dev_err(&client->dev, "failed to find sensor: %d", ret);
1361 goto probe_power_off;
1362 }
1363 }
1364
1365 mutex_init(&ov5675->mutex);
1366 ov5675->cur_mode = &supported_modes[0];
1367 ret = ov5675_init_controls(ov5675);
1368 if (ret) {
1369 dev_err(&client->dev, "failed to init controls: %d", ret);
1370 goto probe_error_v4l2_ctrl_handler_free;
1371 }
1372
1373 ov5675->sd.internal_ops = &ov5675_internal_ops;
1374 ov5675->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1375 ov5675->sd.entity.ops = &ov5675_subdev_entity_ops;
1376 ov5675->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1377 ov5675->pad.flags = MEDIA_PAD_FL_SOURCE;
1378 ret = media_entity_pads_init(&ov5675->sd.entity, 1, &ov5675->pad);
1379 if (ret) {
1380 dev_err(&client->dev, "failed to init entity pads: %d", ret);
1381 goto probe_error_v4l2_ctrl_handler_free;
1382 }
1383
1384 ret = v4l2_async_register_subdev_sensor(&ov5675->sd);
1385 if (ret < 0) {
1386 dev_err(&client->dev, "failed to register V4L2 subdev: %d",
1387 ret);
1388 goto probe_error_media_entity_cleanup;
1389 }
1390
1391 /* Set the device's state to active if it's in D0 state. */
1392 if (full_power)
1393 pm_runtime_set_active(&client->dev);
1394 pm_runtime_enable(&client->dev);
1395 pm_runtime_idle(&client->dev);
1396
1397 return 0;
1398
1399 probe_error_media_entity_cleanup:
1400 media_entity_cleanup(&ov5675->sd.entity);
1401
1402 probe_error_v4l2_ctrl_handler_free:
1403 v4l2_ctrl_handler_free(ov5675->sd.ctrl_handler);
1404 mutex_destroy(&ov5675->mutex);
1405 probe_power_off:
1406 ov5675_power_off(&client->dev);
1407
1408 return ret;
1409 }
1410
1411 static const struct dev_pm_ops ov5675_pm_ops = {
1412 SET_SYSTEM_SLEEP_PM_OPS(ov5675_suspend, ov5675_resume)
1413 SET_RUNTIME_PM_OPS(ov5675_power_off, ov5675_power_on, NULL)
1414 };
1415
1416 #ifdef CONFIG_ACPI
1417 static const struct acpi_device_id ov5675_acpi_ids[] = {
1418 {"OVTI5675"},
1419 {}
1420 };
1421
1422 MODULE_DEVICE_TABLE(acpi, ov5675_acpi_ids);
1423 #endif
1424
1425 static const struct of_device_id ov5675_of_match[] = {
1426 { .compatible = "ovti,ov5675", },
1427 { /* sentinel */ },
1428 };
1429 MODULE_DEVICE_TABLE(of, ov5675_of_match);
1430
1431 static struct i2c_driver ov5675_i2c_driver = {
1432 .driver = {
1433 .name = "ov5675",
1434 .pm = &ov5675_pm_ops,
1435 .acpi_match_table = ACPI_PTR(ov5675_acpi_ids),
1436 .of_match_table = ov5675_of_match,
1437 },
1438 .probe = ov5675_probe,
1439 .remove = ov5675_remove,
1440 .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
1441 };
1442
1443 module_i2c_driver(ov5675_i2c_driver);
1444
1445 MODULE_AUTHOR("Shawn Tu");
1446 MODULE_DESCRIPTION("OmniVision OV5675 sensor driver");
1447 MODULE_LICENSE("GPL v2");
1448
