1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * OmniVision ov9282 Camera Sensor Driver
4 *
5 * Copyright (C) 2021 Intel Corporation
6 */
7 #include <asm/unaligned.h>
8
9 #include <linux/clk.h>
10 #include <linux/delay.h>
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/regulator/consumer.h>
15
16 #include <media/v4l2-ctrls.h>
17 #include <media/v4l2-event.h>
18 #include <media/v4l2-fwnode.h>
19 #include <media/v4l2-subdev.h>
20
21 /* Streaming Mode */
22 #define OV9282_REG_MODE_SELECT 0x0100
23 #define OV9282_MODE_STANDBY 0x00
24 #define OV9282_MODE_STREAMING 0x01
25
26 #define OV9282_REG_PLL_CTRL_0D 0x030d
27 #define OV9282_PLL_CTRL_0D_RAW8 0x60
28 #define OV9282_PLL_CTRL_0D_RAW10 0x50
29
30 #define OV9282_REG_TIMING_HTS 0x380c
31 #define OV9282_TIMING_HTS_MAX 0x7fff
32
33 /* Lines per frame */
34 #define OV9282_REG_LPFR 0x380e
35
36 /* Chip ID */
37 #define OV9282_REG_ID 0x300a
38 #define OV9282_ID 0x9281
39
40 /* Exposure control */
41 #define OV9282_REG_EXPOSURE 0x3500
42 #define OV9282_EXPOSURE_MIN 1
43 #define OV9282_EXPOSURE_OFFSET 12
44 #define OV9282_EXPOSURE_STEP 1
45 #define OV9282_EXPOSURE_DEFAULT 0x0282
46
47 /* Analog gain control */
48 #define OV9282_REG_AGAIN 0x3509
49 #define OV9282_AGAIN_MIN 0x10
50 #define OV9282_AGAIN_MAX 0xff
51 #define OV9282_AGAIN_STEP 1
52 #define OV9282_AGAIN_DEFAULT 0x10
53
54 /* Group hold register */
55 #define OV9282_REG_HOLD 0x3308
56
57 #define OV9282_REG_ANA_CORE_2 0x3662
58 #define OV9282_ANA_CORE2_RAW8 0x07
59 #define OV9282_ANA_CORE2_RAW10 0x05
60
61 #define OV9282_REG_TIMING_FORMAT_1 0x3820
62 #define OV9282_REG_TIMING_FORMAT_2 0x3821
63 #define OV9282_FLIP_BIT BIT(2)
64
65 #define OV9282_REG_MIPI_CTRL00 0x4800
66 #define OV9282_GATED_CLOCK BIT(5)
67
68 /* Input clock rate */
69 #define OV9282_INCLK_RATE 24000000
70
71 /* CSI2 HW configuration */
72 #define OV9282_LINK_FREQ 400000000
73 #define OV9282_NUM_DATA_LANES 2
74
75 /* Pixel rate */
76 #define OV9282_PIXEL_RATE_10BIT (OV9282_LINK_FREQ * 2 * \
77 OV9282_NUM_DATA_LANES / 10)
78 #define OV9282_PIXEL_RATE_8BIT (OV9282_LINK_FREQ * 2 * \
79 OV9282_NUM_DATA_LANES / 8)
80
81 /*
82 * OV9282 native and active pixel array size.
83 * 8 dummy rows/columns on each edge of a 1280x800 active array
84 */
85 #define OV9282_NATIVE_WIDTH 1296U
86 #define OV9282_NATIVE_HEIGHT 816U
87 #define OV9282_PIXEL_ARRAY_LEFT 8U
88 #define OV9282_PIXEL_ARRAY_TOP 8U
89 #define OV9282_PIXEL_ARRAY_WIDTH 1280U
90 #define OV9282_PIXEL_ARRAY_HEIGHT 800U
91
92 #define OV9282_REG_MIN 0x00
93 #define OV9282_REG_MAX 0xfffff
94
95 static const char * const ov9282_supply_names[] = {
96 "avdd", /* Analog power */
97 "dovdd", /* Digital I/O power */
98 "dvdd", /* Digital core power */
99 };
100
101 #define OV9282_NUM_SUPPLIES ARRAY_SIZE(ov9282_supply_names)
102
103 /**
104 * struct ov9282_reg - ov9282 sensor register
105 * @address: Register address
106 * @val: Register value
107 */
108 struct ov9282_reg {
109 u16 address;
110 u8 val;
111 };
112
113 /**
114 * struct ov9282_reg_list - ov9282 sensor register list
115 * @num_of_regs: Number of registers in the list
116 * @regs: Pointer to register list
117 */
118 struct ov9282_reg_list {
119 u32 num_of_regs;
120 const struct ov9282_reg *regs;
121 };
122
123 /**
124 * struct ov9282_mode - ov9282 sensor mode structure
125 * @width: Frame width
126 * @height: Frame height
127 * @hblank_min: Minimum horizontal blanking in lines for non-continuous[0] and
128 * continuous[1] clock modes
129 * @vblank: Vertical blanking in lines
130 * @vblank_min: Minimum vertical blanking in lines
131 * @vblank_max: Maximum vertical blanking in lines
132 * @link_freq_idx: Link frequency index
133 * @crop: on-sensor cropping for this mode
134 * @reg_list: Register list for sensor mode
135 */
136 struct ov9282_mode {
137 u32 width;
138 u32 height;
139 u32 hblank_min[2];
140 u32 vblank;
141 u32 vblank_min;
142 u32 vblank_max;
143 u32 link_freq_idx;
144 struct v4l2_rect crop;
145 struct ov9282_reg_list reg_list;
146 };
147
148 /**
149 * struct ov9282 - ov9282 sensor device structure
150 * @dev: Pointer to generic device
151 * @sd: V4L2 sub-device
152 * @pad: Media pad. Only one pad supported
153 * @reset_gpio: Sensor reset gpio
154 * @inclk: Sensor input clock
155 * @supplies: Regulator supplies for the sensor
156 * @ctrl_handler: V4L2 control handler
157 * @link_freq_ctrl: Pointer to link frequency control
158 * @hblank_ctrl: Pointer to horizontal blanking control
159 * @vblank_ctrl: Pointer to vertical blanking control
160 * @exp_ctrl: Pointer to exposure control
161 * @again_ctrl: Pointer to analog gain control
162 * @pixel_rate: Pointer to pixel rate control
163 * @vblank: Vertical blanking in lines
164 * @noncontinuous_clock: Selection of CSI2 noncontinuous clock mode
165 * @cur_mode: Pointer to current selected sensor mode
166 * @code: Mbus code currently selected
167 * @mutex: Mutex for serializing sensor controls
168 * @streaming: Flag indicating streaming state
169 */
170 struct ov9282 {
171 struct device *dev;
172 struct v4l2_subdev sd;
173 struct media_pad pad;
174 struct gpio_desc *reset_gpio;
175 struct clk *inclk;
176 struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES];
177 struct v4l2_ctrl_handler ctrl_handler;
178 struct v4l2_ctrl *link_freq_ctrl;
179 struct v4l2_ctrl *hblank_ctrl;
180 struct v4l2_ctrl *vblank_ctrl;
181 struct {
182 struct v4l2_ctrl *exp_ctrl;
183 struct v4l2_ctrl *again_ctrl;
184 };
185 struct v4l2_ctrl *pixel_rate;
186 u32 vblank;
187 bool noncontinuous_clock;
188 const struct ov9282_mode *cur_mode;
189 u32 code;
190 struct mutex mutex;
191 bool streaming;
192 };
193
194 static const s64 link_freq[] = {
195 OV9282_LINK_FREQ,
196 };
197
198 /*
199 * Common registers
200 *
201 * Note: Do NOT include a software reset (0x0103, 0x01) in any of these
202 * register arrays as some settings are written as part of ov9282_power_on,
203 * and the reset will clear them.
204 */
205 static const struct ov9282_reg common_regs[] = {
206 {0x0302, 0x32},
207 {0x030e, 0x02},
208 {0x3001, 0x00},
209 {0x3004, 0x00},
210 {0x3005, 0x00},
211 {0x3006, 0x04},
212 {0x3011, 0x0a},
213 {0x3013, 0x18},
214 {0x301c, 0xf0},
215 {0x3022, 0x01},
216 {0x3030, 0x10},
217 {0x3039, 0x32},
218 {0x303a, 0x00},
219 {0x3503, 0x08},
220 {0x3505, 0x8c},
221 {0x3507, 0x03},
222 {0x3508, 0x00},
223 {0x3610, 0x80},
224 {0x3611, 0xa0},
225 {0x3620, 0x6e},
226 {0x3632, 0x56},
227 {0x3633, 0x78},
228 {0x3666, 0x00},
229 {0x366f, 0x5a},
230 {0x3680, 0x84},
231 {0x3712, 0x80},
232 {0x372d, 0x22},
233 {0x3731, 0x80},
234 {0x3732, 0x30},
235 {0x377d, 0x22},
236 {0x3788, 0x02},
237 {0x3789, 0xa4},
238 {0x378a, 0x00},
239 {0x378b, 0x4a},
240 {0x3799, 0x20},
241 {0x3881, 0x42},
242 {0x38a8, 0x02},
243 {0x38a9, 0x80},
244 {0x38b1, 0x00},
245 {0x38c4, 0x00},
246 {0x38c5, 0xc0},
247 {0x38c6, 0x04},
248 {0x38c7, 0x80},
249 {0x3920, 0xff},
250 {0x4010, 0x40},
251 {0x4043, 0x40},
252 {0x4307, 0x30},
253 {0x4317, 0x00},
254 {0x4501, 0x00},
255 {0x450a, 0x08},
256 {0x4601, 0x04},
257 {0x470f, 0x00},
258 {0x4f07, 0x00},
259 {0x5000, 0x9f},
260 {0x5001, 0x00},
261 {0x5e00, 0x00},
262 {0x5d00, 0x07},
263 {0x5d01, 0x00},
264 {0x0101, 0x01},
265 {0x1000, 0x03},
266 {0x5a08, 0x84},
267 };
268
269 static struct ov9282_reg_list common_regs_list = {
270 .num_of_regs = ARRAY_SIZE(common_regs),
271 .regs = common_regs,
272 };
273
274 #define MODE_1280_800 0
275 #define MODE_1280_720 1
276 #define MODE_640_400 2
277
278 #define DEFAULT_MODE MODE_1280_720
279
280 /* Sensor mode registers */
281 static const struct ov9282_reg mode_1280x800_regs[] = {
282 {0x3778, 0x00},
283 {0x3800, 0x00},
284 {0x3801, 0x00},
285 {0x3802, 0x00},
286 {0x3803, 0x00},
287 {0x3804, 0x05},
288 {0x3805, 0x0f},
289 {0x3806, 0x03},
290 {0x3807, 0x2f},
291 {0x3808, 0x05},
292 {0x3809, 0x00},
293 {0x380a, 0x03},
294 {0x380b, 0x20},
295 {0x3810, 0x00},
296 {0x3811, 0x08},
297 {0x3812, 0x00},
298 {0x3813, 0x08},
299 {0x3814, 0x11},
300 {0x3815, 0x11},
301 {0x3820, 0x40},
302 {0x3821, 0x00},
303 {0x4003, 0x40},
304 {0x4008, 0x04},
305 {0x4009, 0x0b},
306 {0x400c, 0x00},
307 {0x400d, 0x07},
308 {0x4507, 0x00},
309 {0x4509, 0x00},
310 };
311
312 static const struct ov9282_reg mode_1280x720_regs[] = {
313 {0x3778, 0x00},
314 {0x3800, 0x00},
315 {0x3801, 0x00},
316 {0x3802, 0x00},
317 {0x3803, 0x00},
318 {0x3804, 0x05},
319 {0x3805, 0x0f},
320 {0x3806, 0x02},
321 {0x3807, 0xdf},
322 {0x3808, 0x05},
323 {0x3809, 0x00},
324 {0x380a, 0x02},
325 {0x380b, 0xd0},
326 {0x3810, 0x00},
327 {0x3811, 0x08},
328 {0x3812, 0x00},
329 {0x3813, 0x08},
330 {0x3814, 0x11},
331 {0x3815, 0x11},
332 {0x3820, 0x3c},
333 {0x3821, 0x84},
334 {0x4003, 0x40},
335 {0x4008, 0x02},
336 {0x4009, 0x05},
337 {0x400c, 0x00},
338 {0x400d, 0x03},
339 {0x4507, 0x00},
340 {0x4509, 0x80},
341 };
342
343 static const struct ov9282_reg mode_640x400_regs[] = {
344 {0x3778, 0x10},
345 {0x3800, 0x00},
346 {0x3801, 0x00},
347 {0x3802, 0x00},
348 {0x3803, 0x00},
349 {0x3804, 0x05},
350 {0x3805, 0x0f},
351 {0x3806, 0x03},
352 {0x3807, 0x2f},
353 {0x3808, 0x02},
354 {0x3809, 0x80},
355 {0x380a, 0x01},
356 {0x380b, 0x90},
357 {0x3810, 0x00},
358 {0x3811, 0x04},
359 {0x3812, 0x00},
360 {0x3813, 0x04},
361 {0x3814, 0x31},
362 {0x3815, 0x22},
363 {0x3820, 0x60},
364 {0x3821, 0x01},
365 {0x4008, 0x02},
366 {0x4009, 0x05},
367 {0x400c, 0x00},
368 {0x400d, 0x03},
369 {0x4507, 0x03},
370 {0x4509, 0x80},
371 };
372
373 /* Supported sensor mode configurations */
374 static const struct ov9282_mode supported_modes[] = {
375 [MODE_1280_800] = {
376 .width = 1280,
377 .height = 800,
378 .hblank_min = { 250, 176 },
379 .vblank = 1022,
380 .vblank_min = 110,
381 .vblank_max = 51540,
382 .link_freq_idx = 0,
383 .crop = {
384 .left = OV9282_PIXEL_ARRAY_LEFT,
385 .top = OV9282_PIXEL_ARRAY_TOP,
386 .width = 1280,
387 .height = 800
388 },
389 .reg_list = {
390 .num_of_regs = ARRAY_SIZE(mode_1280x800_regs),
391 .regs = mode_1280x800_regs,
392 },
393 },
394 [MODE_1280_720] = {
395 .width = 1280,
396 .height = 720,
397 .hblank_min = { 250, 176 },
398 .vblank = 1022,
399 .vblank_min = 41,
400 .vblank_max = 51540,
401 .link_freq_idx = 0,
402 .crop = {
403 /*
404 * Note that this mode takes the top 720 lines from the
405 * 800 of the sensor. It does not take a middle crop.
406 */
407 .left = OV9282_PIXEL_ARRAY_LEFT,
408 .top = OV9282_PIXEL_ARRAY_TOP,
409 .width = 1280,
410 .height = 720
411 },
412 .reg_list = {
413 .num_of_regs = ARRAY_SIZE(mode_1280x720_regs),
414 .regs = mode_1280x720_regs,
415 },
416 },
417 [MODE_640_400] = {
418 .width = 640,
419 .height = 400,
420 .hblank_min = { 890, 816 },
421 .vblank = 1022,
422 .vblank_min = 22,
423 .vblank_max = 51540,
424 .link_freq_idx = 0,
425 .crop = {
426 .left = OV9282_PIXEL_ARRAY_LEFT,
427 .top = OV9282_PIXEL_ARRAY_TOP,
428 .width = 1280,
429 .height = 800
430 },
431 .reg_list = {
432 .num_of_regs = ARRAY_SIZE(mode_640x400_regs),
433 .regs = mode_640x400_regs,
434 },
435 },
436 };
437
438 /**
439 * to_ov9282() - ov9282 V4L2 sub-device to ov9282 device.
440 * @subdev: pointer to ov9282 V4L2 sub-device
441 *
442 * Return: pointer to ov9282 device
443 */
to_ov9282(struct v4l2_subdev * subdev)444 static inline struct ov9282 *to_ov9282(struct v4l2_subdev *subdev)
445 {
446 return container_of(subdev, struct ov9282, sd);
447 }
448
449 /**
450 * ov9282_read_reg() - Read registers.
451 * @ov9282: pointer to ov9282 device
452 * @reg: register address
453 * @len: length of bytes to read. Max supported bytes is 4
454 * @val: pointer to register value to be filled.
455 *
456 * Return: 0 if successful, error code otherwise.
457 */
ov9282_read_reg(struct ov9282 * ov9282,u16 reg,u32 len,u32 * val)458 static int ov9282_read_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 *val)
459 {
460 struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
461 struct i2c_msg msgs[2] = {0};
462 u8 addr_buf[2] = {0};
463 u8 data_buf[4] = {0};
464 int ret;
465
466 if (WARN_ON(len > 4))
467 return -EINVAL;
468
469 put_unaligned_be16(reg, addr_buf);
470
471 /* Write register address */
472 msgs[0].addr = client->addr;
473 msgs[0].flags = 0;
474 msgs[0].len = ARRAY_SIZE(addr_buf);
475 msgs[0].buf = addr_buf;
476
477 /* Read data from register */
478 msgs[1].addr = client->addr;
479 msgs[1].flags = I2C_M_RD;
480 msgs[1].len = len;
481 msgs[1].buf = &data_buf[4 - len];
482
483 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
484 if (ret != ARRAY_SIZE(msgs))
485 return -EIO;
486
487 *val = get_unaligned_be32(data_buf);
488
489 return 0;
490 }
491
492 /**
493 * ov9282_write_reg() - Write register
494 * @ov9282: pointer to ov9282 device
495 * @reg: register address
496 * @len: length of bytes. Max supported bytes is 4
497 * @val: register value
498 *
499 * Return: 0 if successful, error code otherwise.
500 */
ov9282_write_reg(struct ov9282 * ov9282,u16 reg,u32 len,u32 val)501 static int ov9282_write_reg(struct ov9282 *ov9282, u16 reg, u32 len, u32 val)
502 {
503 struct i2c_client *client = v4l2_get_subdevdata(&ov9282->sd);
504 u8 buf[6] = {0};
505
506 if (WARN_ON(len > 4))
507 return -EINVAL;
508
509 put_unaligned_be16(reg, buf);
510 put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
511 if (i2c_master_send(client, buf, len + 2) != len + 2)
512 return -EIO;
513
514 return 0;
515 }
516
517 /**
518 * ov9282_write_regs() - Write a list of registers
519 * @ov9282: pointer to ov9282 device
520 * @regs: list of registers to be written
521 * @len: length of registers array
522 *
523 * Return: 0 if successful, error code otherwise.
524 */
ov9282_write_regs(struct ov9282 * ov9282,const struct ov9282_reg * regs,u32 len)525 static int ov9282_write_regs(struct ov9282 *ov9282,
526 const struct ov9282_reg *regs, u32 len)
527 {
528 unsigned int i;
529 int ret;
530
531 for (i = 0; i < len; i++) {
532 ret = ov9282_write_reg(ov9282, regs[i].address, 1, regs[i].val);
533 if (ret)
534 return ret;
535 }
536
537 return 0;
538 }
539
540 /**
541 * ov9282_update_controls() - Update control ranges based on streaming mode
542 * @ov9282: pointer to ov9282 device
543 * @mode: pointer to ov9282_mode sensor mode
544 * @fmt: pointer to the requested mode
545 *
546 * Return: 0 if successful, error code otherwise.
547 */
ov9282_update_controls(struct ov9282 * ov9282,const struct ov9282_mode * mode,const struct v4l2_subdev_format * fmt)548 static int ov9282_update_controls(struct ov9282 *ov9282,
549 const struct ov9282_mode *mode,
550 const struct v4l2_subdev_format *fmt)
551 {
552 u32 hblank_min;
553 s64 pixel_rate;
554 int ret;
555
556 ret = __v4l2_ctrl_s_ctrl(ov9282->link_freq_ctrl, mode->link_freq_idx);
557 if (ret)
558 return ret;
559
560 pixel_rate = (fmt->format.code == MEDIA_BUS_FMT_Y10_1X10) ?
561 OV9282_PIXEL_RATE_10BIT : OV9282_PIXEL_RATE_8BIT;
562 ret = __v4l2_ctrl_modify_range(ov9282->pixel_rate, pixel_rate,
563 pixel_rate, 1, pixel_rate);
564 if (ret)
565 return ret;
566
567 hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
568 ret = __v4l2_ctrl_modify_range(ov9282->hblank_ctrl, hblank_min,
569 OV9282_TIMING_HTS_MAX - mode->width, 1,
570 hblank_min);
571 if (ret)
572 return ret;
573
574 return __v4l2_ctrl_modify_range(ov9282->vblank_ctrl, mode->vblank_min,
575 mode->vblank_max, 1, mode->vblank);
576 }
577
578 /**
579 * ov9282_update_exp_gain() - Set updated exposure and gain
580 * @ov9282: pointer to ov9282 device
581 * @exposure: updated exposure value
582 * @gain: updated analog gain value
583 *
584 * Return: 0 if successful, error code otherwise.
585 */
ov9282_update_exp_gain(struct ov9282 * ov9282,u32 exposure,u32 gain)586 static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain)
587 {
588 int ret;
589
590 dev_dbg(ov9282->dev, "Set exp %u, analog gain %u",
591 exposure, gain);
592
593 ret = ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 1);
594 if (ret)
595 return ret;
596
597 ret = ov9282_write_reg(ov9282, OV9282_REG_EXPOSURE, 3, exposure << 4);
598 if (ret)
599 goto error_release_group_hold;
600
601 ret = ov9282_write_reg(ov9282, OV9282_REG_AGAIN, 1, gain);
602
603 error_release_group_hold:
604 ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 0);
605
606 return ret;
607 }
608
ov9282_set_ctrl_hflip(struct ov9282 * ov9282,int value)609 static int ov9282_set_ctrl_hflip(struct ov9282 *ov9282, int value)
610 {
611 u32 current_val;
612 int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
613 ¤t_val);
614 if (ret)
615 return ret;
616
617 if (value)
618 current_val |= OV9282_FLIP_BIT;
619 else
620 current_val &= ~OV9282_FLIP_BIT;
621
622 return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_2, 1,
623 current_val);
624 }
625
ov9282_set_ctrl_vflip(struct ov9282 * ov9282,int value)626 static int ov9282_set_ctrl_vflip(struct ov9282 *ov9282, int value)
627 {
628 u32 current_val;
629 int ret = ov9282_read_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
630 ¤t_val);
631 if (ret)
632 return ret;
633
634 if (value)
635 current_val |= OV9282_FLIP_BIT;
636 else
637 current_val &= ~OV9282_FLIP_BIT;
638
639 return ov9282_write_reg(ov9282, OV9282_REG_TIMING_FORMAT_1, 1,
640 current_val);
641 }
642
643 /**
644 * ov9282_set_ctrl() - Set subdevice control
645 * @ctrl: pointer to v4l2_ctrl structure
646 *
647 * Supported controls:
648 * - V4L2_CID_VBLANK
649 * - cluster controls:
650 * - V4L2_CID_ANALOGUE_GAIN
651 * - V4L2_CID_EXPOSURE
652 *
653 * Return: 0 if successful, error code otherwise.
654 */
ov9282_set_ctrl(struct v4l2_ctrl * ctrl)655 static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
656 {
657 struct ov9282 *ov9282 =
658 container_of(ctrl->handler, struct ov9282, ctrl_handler);
659 u32 analog_gain;
660 u32 exposure;
661 u32 lpfr;
662 int ret;
663
664 switch (ctrl->id) {
665 case V4L2_CID_VBLANK:
666 ov9282->vblank = ov9282->vblank_ctrl->val;
667
668 dev_dbg(ov9282->dev, "Received vblank %u, new lpfr %u",
669 ov9282->vblank,
670 ov9282->vblank + ov9282->cur_mode->height);
671
672 ret = __v4l2_ctrl_modify_range(ov9282->exp_ctrl,
673 OV9282_EXPOSURE_MIN,
674 ov9282->vblank +
675 ov9282->cur_mode->height -
676 OV9282_EXPOSURE_OFFSET,
677 1, OV9282_EXPOSURE_DEFAULT);
678 break;
679 }
680
681 /* Set controls only if sensor is in power on state */
682 if (!pm_runtime_get_if_in_use(ov9282->dev))
683 return 0;
684
685 switch (ctrl->id) {
686 case V4L2_CID_EXPOSURE:
687 exposure = ctrl->val;
688 analog_gain = ov9282->again_ctrl->val;
689
690 dev_dbg(ov9282->dev, "Received exp %u, analog gain %u",
691 exposure, analog_gain);
692
693 ret = ov9282_update_exp_gain(ov9282, exposure, analog_gain);
694 break;
695 case V4L2_CID_VBLANK:
696 lpfr = ov9282->vblank + ov9282->cur_mode->height;
697 ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr);
698 break;
699 case V4L2_CID_HFLIP:
700 ret = ov9282_set_ctrl_hflip(ov9282, ctrl->val);
701 break;
702 case V4L2_CID_VFLIP:
703 ret = ov9282_set_ctrl_vflip(ov9282, ctrl->val);
704 break;
705 case V4L2_CID_HBLANK:
706 ret = ov9282_write_reg(ov9282, OV9282_REG_TIMING_HTS, 2,
707 (ctrl->val + ov9282->cur_mode->width) >> 1);
708 break;
709 default:
710 dev_err(ov9282->dev, "Invalid control %d", ctrl->id);
711 ret = -EINVAL;
712 }
713
714 pm_runtime_put(ov9282->dev);
715
716 return ret;
717 }
718
719 /* V4l2 subdevice control ops*/
720 static const struct v4l2_ctrl_ops ov9282_ctrl_ops = {
721 .s_ctrl = ov9282_set_ctrl,
722 };
723
724 /**
725 * ov9282_enum_mbus_code() - Enumerate V4L2 sub-device mbus codes
726 * @sd: pointer to ov9282 V4L2 sub-device structure
727 * @sd_state: V4L2 sub-device configuration
728 * @code: V4L2 sub-device code enumeration need to be filled
729 *
730 * Return: 0 if successful, error code otherwise.
731 */
ov9282_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)732 static int ov9282_enum_mbus_code(struct v4l2_subdev *sd,
733 struct v4l2_subdev_state *sd_state,
734 struct v4l2_subdev_mbus_code_enum *code)
735 {
736 switch (code->index) {
737 case 0:
738 code->code = MEDIA_BUS_FMT_Y10_1X10;
739 break;
740 case 1:
741 code->code = MEDIA_BUS_FMT_Y8_1X8;
742 break;
743 default:
744 return -EINVAL;
745 }
746
747 return 0;
748 }
749
750 /**
751 * ov9282_enum_frame_size() - Enumerate V4L2 sub-device frame sizes
752 * @sd: pointer to ov9282 V4L2 sub-device structure
753 * @sd_state: V4L2 sub-device configuration
754 * @fsize: V4L2 sub-device size enumeration need to be filled
755 *
756 * Return: 0 if successful, error code otherwise.
757 */
ov9282_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fsize)758 static int ov9282_enum_frame_size(struct v4l2_subdev *sd,
759 struct v4l2_subdev_state *sd_state,
760 struct v4l2_subdev_frame_size_enum *fsize)
761 {
762 if (fsize->index >= ARRAY_SIZE(supported_modes))
763 return -EINVAL;
764
765 if (fsize->code != MEDIA_BUS_FMT_Y10_1X10 &&
766 fsize->code != MEDIA_BUS_FMT_Y8_1X8)
767 return -EINVAL;
768
769 fsize->min_width = supported_modes[fsize->index].width;
770 fsize->max_width = fsize->min_width;
771 fsize->min_height = supported_modes[fsize->index].height;
772 fsize->max_height = fsize->min_height;
773
774 return 0;
775 }
776
777 /**
778 * ov9282_fill_pad_format() - Fill subdevice pad format
779 * from selected sensor mode
780 * @ov9282: pointer to ov9282 device
781 * @mode: pointer to ov9282_mode sensor mode
782 * @code: mbus code to be stored
783 * @fmt: V4L2 sub-device format need to be filled
784 */
ov9282_fill_pad_format(struct ov9282 * ov9282,const struct ov9282_mode * mode,u32 code,struct v4l2_subdev_format * fmt)785 static void ov9282_fill_pad_format(struct ov9282 *ov9282,
786 const struct ov9282_mode *mode,
787 u32 code,
788 struct v4l2_subdev_format *fmt)
789 {
790 fmt->format.width = mode->width;
791 fmt->format.height = mode->height;
792 fmt->format.code = code;
793 fmt->format.field = V4L2_FIELD_NONE;
794 fmt->format.colorspace = V4L2_COLORSPACE_RAW;
795 fmt->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
796 fmt->format.quantization = V4L2_QUANTIZATION_DEFAULT;
797 fmt->format.xfer_func = V4L2_XFER_FUNC_NONE;
798 }
799
800 /**
801 * ov9282_get_pad_format() - Get subdevice pad format
802 * @sd: pointer to ov9282 V4L2 sub-device structure
803 * @sd_state: V4L2 sub-device configuration
804 * @fmt: V4L2 sub-device format need to be set
805 *
806 * Return: 0 if successful, error code otherwise.
807 */
ov9282_get_pad_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)808 static int ov9282_get_pad_format(struct v4l2_subdev *sd,
809 struct v4l2_subdev_state *sd_state,
810 struct v4l2_subdev_format *fmt)
811 {
812 struct ov9282 *ov9282 = to_ov9282(sd);
813
814 mutex_lock(&ov9282->mutex);
815
816 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
817 struct v4l2_mbus_framefmt *framefmt;
818
819 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
820 fmt->format = *framefmt;
821 } else {
822 ov9282_fill_pad_format(ov9282, ov9282->cur_mode, ov9282->code,
823 fmt);
824 }
825
826 mutex_unlock(&ov9282->mutex);
827
828 return 0;
829 }
830
831 /**
832 * ov9282_set_pad_format() - Set subdevice pad format
833 * @sd: pointer to ov9282 V4L2 sub-device structure
834 * @sd_state: V4L2 sub-device configuration
835 * @fmt: V4L2 sub-device format need to be set
836 *
837 * Return: 0 if successful, error code otherwise.
838 */
ov9282_set_pad_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)839 static int ov9282_set_pad_format(struct v4l2_subdev *sd,
840 struct v4l2_subdev_state *sd_state,
841 struct v4l2_subdev_format *fmt)
842 {
843 struct ov9282 *ov9282 = to_ov9282(sd);
844 const struct ov9282_mode *mode;
845 u32 code;
846 int ret = 0;
847
848 mutex_lock(&ov9282->mutex);
849
850 mode = v4l2_find_nearest_size(supported_modes,
851 ARRAY_SIZE(supported_modes),
852 width, height,
853 fmt->format.width,
854 fmt->format.height);
855 if (fmt->format.code == MEDIA_BUS_FMT_Y8_1X8)
856 code = MEDIA_BUS_FMT_Y8_1X8;
857 else
858 code = MEDIA_BUS_FMT_Y10_1X10;
859
860 ov9282_fill_pad_format(ov9282, mode, code, fmt);
861
862 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
863 struct v4l2_mbus_framefmt *framefmt;
864
865 framefmt = v4l2_subdev_get_try_format(sd, sd_state, fmt->pad);
866 *framefmt = fmt->format;
867 } else {
868 ret = ov9282_update_controls(ov9282, mode, fmt);
869 if (!ret) {
870 ov9282->cur_mode = mode;
871 ov9282->code = code;
872 }
873 }
874
875 mutex_unlock(&ov9282->mutex);
876
877 return ret;
878 }
879
880 /**
881 * ov9282_init_pad_cfg() - Initialize sub-device pad configuration
882 * @sd: pointer to ov9282 V4L2 sub-device structure
883 * @sd_state: V4L2 sub-device configuration
884 *
885 * Return: 0 if successful, error code otherwise.
886 */
ov9282_init_pad_cfg(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state)887 static int ov9282_init_pad_cfg(struct v4l2_subdev *sd,
888 struct v4l2_subdev_state *sd_state)
889 {
890 struct ov9282 *ov9282 = to_ov9282(sd);
891 struct v4l2_subdev_format fmt = { 0 };
892
893 fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
894 ov9282_fill_pad_format(ov9282, &supported_modes[DEFAULT_MODE],
895 ov9282->code, &fmt);
896
897 return ov9282_set_pad_format(sd, sd_state, &fmt);
898 }
899
900 static const struct v4l2_rect *
__ov9282_get_pad_crop(struct ov9282 * ov9282,struct v4l2_subdev_state * sd_state,unsigned int pad,enum v4l2_subdev_format_whence which)901 __ov9282_get_pad_crop(struct ov9282 *ov9282,
902 struct v4l2_subdev_state *sd_state,
903 unsigned int pad, enum v4l2_subdev_format_whence which)
904 {
905 switch (which) {
906 case V4L2_SUBDEV_FORMAT_TRY:
907 return v4l2_subdev_get_try_crop(&ov9282->sd, sd_state, pad);
908 case V4L2_SUBDEV_FORMAT_ACTIVE:
909 return &ov9282->cur_mode->crop;
910 }
911
912 return NULL;
913 }
914
ov9282_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)915 static int ov9282_get_selection(struct v4l2_subdev *sd,
916 struct v4l2_subdev_state *sd_state,
917 struct v4l2_subdev_selection *sel)
918 {
919 switch (sel->target) {
920 case V4L2_SEL_TGT_CROP: {
921 struct ov9282 *ov9282 = to_ov9282(sd);
922
923 mutex_lock(&ov9282->mutex);
924 sel->r = *__ov9282_get_pad_crop(ov9282, sd_state, sel->pad,
925 sel->which);
926 mutex_unlock(&ov9282->mutex);
927
928 return 0;
929 }
930
931 case V4L2_SEL_TGT_NATIVE_SIZE:
932 sel->r.top = 0;
933 sel->r.left = 0;
934 sel->r.width = OV9282_NATIVE_WIDTH;
935 sel->r.height = OV9282_NATIVE_HEIGHT;
936
937 return 0;
938
939 case V4L2_SEL_TGT_CROP_DEFAULT:
940 case V4L2_SEL_TGT_CROP_BOUNDS:
941 sel->r.top = OV9282_PIXEL_ARRAY_TOP;
942 sel->r.left = OV9282_PIXEL_ARRAY_LEFT;
943 sel->r.width = OV9282_PIXEL_ARRAY_WIDTH;
944 sel->r.height = OV9282_PIXEL_ARRAY_HEIGHT;
945
946 return 0;
947 }
948
949 return -EINVAL;
950 }
951
952 /**
953 * ov9282_start_streaming() - Start sensor stream
954 * @ov9282: pointer to ov9282 device
955 *
956 * Return: 0 if successful, error code otherwise.
957 */
ov9282_start_streaming(struct ov9282 * ov9282)958 static int ov9282_start_streaming(struct ov9282 *ov9282)
959 {
960 const struct ov9282_reg bitdepth_regs[2][2] = {
961 {
962 {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW10},
963 {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW10},
964 }, {
965 {OV9282_REG_PLL_CTRL_0D, OV9282_PLL_CTRL_0D_RAW8},
966 {OV9282_REG_ANA_CORE_2, OV9282_ANA_CORE2_RAW8},
967 }
968 };
969 const struct ov9282_reg_list *reg_list;
970 int bitdepth_index;
971 int ret;
972
973 /* Write common registers */
974 ret = ov9282_write_regs(ov9282, common_regs_list.regs,
975 common_regs_list.num_of_regs);
976 if (ret) {
977 dev_err(ov9282->dev, "fail to write common registers");
978 return ret;
979 }
980
981 bitdepth_index = ov9282->code == MEDIA_BUS_FMT_Y10_1X10 ? 0 : 1;
982 ret = ov9282_write_regs(ov9282, bitdepth_regs[bitdepth_index], 2);
983 if (ret) {
984 dev_err(ov9282->dev, "fail to write bitdepth regs");
985 return ret;
986 }
987
988 /* Write sensor mode registers */
989 reg_list = &ov9282->cur_mode->reg_list;
990 ret = ov9282_write_regs(ov9282, reg_list->regs, reg_list->num_of_regs);
991 if (ret) {
992 dev_err(ov9282->dev, "fail to write initial registers");
993 return ret;
994 }
995
996 /* Setup handler will write actual exposure and gain */
997 ret = __v4l2_ctrl_handler_setup(ov9282->sd.ctrl_handler);
998 if (ret) {
999 dev_err(ov9282->dev, "fail to setup handler");
1000 return ret;
1001 }
1002
1003 /* Start streaming */
1004 ret = ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1005 1, OV9282_MODE_STREAMING);
1006 if (ret) {
1007 dev_err(ov9282->dev, "fail to start streaming");
1008 return ret;
1009 }
1010
1011 return 0;
1012 }
1013
1014 /**
1015 * ov9282_stop_streaming() - Stop sensor stream
1016 * @ov9282: pointer to ov9282 device
1017 *
1018 * Return: 0 if successful, error code otherwise.
1019 */
ov9282_stop_streaming(struct ov9282 * ov9282)1020 static int ov9282_stop_streaming(struct ov9282 *ov9282)
1021 {
1022 return ov9282_write_reg(ov9282, OV9282_REG_MODE_SELECT,
1023 1, OV9282_MODE_STANDBY);
1024 }
1025
1026 /**
1027 * ov9282_set_stream() - Enable sensor streaming
1028 * @sd: pointer to ov9282 subdevice
1029 * @enable: set to enable sensor streaming
1030 *
1031 * Return: 0 if successful, error code otherwise.
1032 */
ov9282_set_stream(struct v4l2_subdev * sd,int enable)1033 static int ov9282_set_stream(struct v4l2_subdev *sd, int enable)
1034 {
1035 struct ov9282 *ov9282 = to_ov9282(sd);
1036 int ret;
1037
1038 mutex_lock(&ov9282->mutex);
1039
1040 if (ov9282->streaming == enable) {
1041 mutex_unlock(&ov9282->mutex);
1042 return 0;
1043 }
1044
1045 if (enable) {
1046 ret = pm_runtime_resume_and_get(ov9282->dev);
1047 if (ret)
1048 goto error_unlock;
1049
1050 ret = ov9282_start_streaming(ov9282);
1051 if (ret)
1052 goto error_power_off;
1053 } else {
1054 ov9282_stop_streaming(ov9282);
1055 pm_runtime_put(ov9282->dev);
1056 }
1057
1058 ov9282->streaming = enable;
1059
1060 mutex_unlock(&ov9282->mutex);
1061
1062 return 0;
1063
1064 error_power_off:
1065 pm_runtime_put(ov9282->dev);
1066 error_unlock:
1067 mutex_unlock(&ov9282->mutex);
1068
1069 return ret;
1070 }
1071
1072 /**
1073 * ov9282_detect() - Detect ov9282 sensor
1074 * @ov9282: pointer to ov9282 device
1075 *
1076 * Return: 0 if successful, -EIO if sensor id does not match
1077 */
ov9282_detect(struct ov9282 * ov9282)1078 static int ov9282_detect(struct ov9282 *ov9282)
1079 {
1080 int ret;
1081 u32 val;
1082
1083 ret = ov9282_read_reg(ov9282, OV9282_REG_ID, 2, &val);
1084 if (ret)
1085 return ret;
1086
1087 if (val != OV9282_ID) {
1088 dev_err(ov9282->dev, "chip id mismatch: %x!=%x",
1089 OV9282_ID, val);
1090 return -ENXIO;
1091 }
1092
1093 return 0;
1094 }
1095
ov9282_configure_regulators(struct ov9282 * ov9282)1096 static int ov9282_configure_regulators(struct ov9282 *ov9282)
1097 {
1098 unsigned int i;
1099
1100 for (i = 0; i < OV9282_NUM_SUPPLIES; i++)
1101 ov9282->supplies[i].supply = ov9282_supply_names[i];
1102
1103 return devm_regulator_bulk_get(ov9282->dev,
1104 OV9282_NUM_SUPPLIES,
1105 ov9282->supplies);
1106 }
1107
1108 /**
1109 * ov9282_parse_hw_config() - Parse HW configuration and check if supported
1110 * @ov9282: pointer to ov9282 device
1111 *
1112 * Return: 0 if successful, error code otherwise.
1113 */
ov9282_parse_hw_config(struct ov9282 * ov9282)1114 static int ov9282_parse_hw_config(struct ov9282 *ov9282)
1115 {
1116 struct fwnode_handle *fwnode = dev_fwnode(ov9282->dev);
1117 struct v4l2_fwnode_endpoint bus_cfg = {
1118 .bus_type = V4L2_MBUS_CSI2_DPHY
1119 };
1120 struct fwnode_handle *ep;
1121 unsigned long rate;
1122 unsigned int i;
1123 int ret;
1124
1125 if (!fwnode)
1126 return -ENXIO;
1127
1128 /* Request optional reset pin */
1129 ov9282->reset_gpio = devm_gpiod_get_optional(ov9282->dev, "reset",
1130 GPIOD_OUT_LOW);
1131 if (IS_ERR(ov9282->reset_gpio)) {
1132 dev_err(ov9282->dev, "failed to get reset gpio %ld",
1133 PTR_ERR(ov9282->reset_gpio));
1134 return PTR_ERR(ov9282->reset_gpio);
1135 }
1136
1137 /* Get sensor input clock */
1138 ov9282->inclk = devm_clk_get(ov9282->dev, NULL);
1139 if (IS_ERR(ov9282->inclk)) {
1140 dev_err(ov9282->dev, "could not get inclk");
1141 return PTR_ERR(ov9282->inclk);
1142 }
1143
1144 ret = ov9282_configure_regulators(ov9282);
1145 if (ret)
1146 return dev_err_probe(ov9282->dev, ret,
1147 "Failed to get power regulators\n");
1148
1149 rate = clk_get_rate(ov9282->inclk);
1150 if (rate != OV9282_INCLK_RATE) {
1151 dev_err(ov9282->dev, "inclk frequency mismatch");
1152 return -EINVAL;
1153 }
1154
1155 ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
1156 if (!ep)
1157 return -ENXIO;
1158
1159 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
1160 fwnode_handle_put(ep);
1161 if (ret)
1162 return ret;
1163
1164 ov9282->noncontinuous_clock =
1165 bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
1166
1167 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV9282_NUM_DATA_LANES) {
1168 dev_err(ov9282->dev,
1169 "number of CSI2 data lanes %d is not supported",
1170 bus_cfg.bus.mipi_csi2.num_data_lanes);
1171 ret = -EINVAL;
1172 goto done_endpoint_free;
1173 }
1174
1175 if (!bus_cfg.nr_of_link_frequencies) {
1176 dev_err(ov9282->dev, "no link frequencies defined");
1177 ret = -EINVAL;
1178 goto done_endpoint_free;
1179 }
1180
1181 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
1182 if (bus_cfg.link_frequencies[i] == OV9282_LINK_FREQ)
1183 goto done_endpoint_free;
1184
1185 ret = -EINVAL;
1186
1187 done_endpoint_free:
1188 v4l2_fwnode_endpoint_free(&bus_cfg);
1189
1190 return ret;
1191 }
1192
1193 /* V4l2 subdevice ops */
1194 static const struct v4l2_subdev_core_ops ov9282_core_ops = {
1195 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1196 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1197 };
1198
1199 static const struct v4l2_subdev_video_ops ov9282_video_ops = {
1200 .s_stream = ov9282_set_stream,
1201 };
1202
1203 static const struct v4l2_subdev_pad_ops ov9282_pad_ops = {
1204 .init_cfg = ov9282_init_pad_cfg,
1205 .enum_mbus_code = ov9282_enum_mbus_code,
1206 .enum_frame_size = ov9282_enum_frame_size,
1207 .get_fmt = ov9282_get_pad_format,
1208 .set_fmt = ov9282_set_pad_format,
1209 .get_selection = ov9282_get_selection,
1210 };
1211
1212 static const struct v4l2_subdev_ops ov9282_subdev_ops = {
1213 .core = &ov9282_core_ops,
1214 .video = &ov9282_video_ops,
1215 .pad = &ov9282_pad_ops,
1216 };
1217
1218 /**
1219 * ov9282_power_on() - Sensor power on sequence
1220 * @dev: pointer to i2c device
1221 *
1222 * Return: 0 if successful, error code otherwise.
1223 */
ov9282_power_on(struct device * dev)1224 static int ov9282_power_on(struct device *dev)
1225 {
1226 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1227 struct ov9282 *ov9282 = to_ov9282(sd);
1228 int ret;
1229
1230 ret = regulator_bulk_enable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1231 if (ret < 0) {
1232 dev_err(dev, "Failed to enable regulators\n");
1233 return ret;
1234 }
1235
1236 usleep_range(400, 600);
1237
1238 gpiod_set_value_cansleep(ov9282->reset_gpio, 1);
1239
1240 ret = clk_prepare_enable(ov9282->inclk);
1241 if (ret) {
1242 dev_err(ov9282->dev, "fail to enable inclk");
1243 goto error_reset;
1244 }
1245
1246 usleep_range(400, 600);
1247
1248 ret = ov9282_write_reg(ov9282, OV9282_REG_MIPI_CTRL00, 1,
1249 ov9282->noncontinuous_clock ?
1250 OV9282_GATED_CLOCK : 0);
1251 if (ret) {
1252 dev_err(ov9282->dev, "fail to write MIPI_CTRL00");
1253 goto error_clk;
1254 }
1255
1256 return 0;
1257
1258 error_clk:
1259 clk_disable_unprepare(ov9282->inclk);
1260 error_reset:
1261 gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1262
1263 regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1264
1265 return ret;
1266 }
1267
1268 /**
1269 * ov9282_power_off() - Sensor power off sequence
1270 * @dev: pointer to i2c device
1271 *
1272 * Return: 0 if successful, error code otherwise.
1273 */
ov9282_power_off(struct device * dev)1274 static int ov9282_power_off(struct device *dev)
1275 {
1276 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1277 struct ov9282 *ov9282 = to_ov9282(sd);
1278
1279 gpiod_set_value_cansleep(ov9282->reset_gpio, 0);
1280
1281 clk_disable_unprepare(ov9282->inclk);
1282
1283 regulator_bulk_disable(OV9282_NUM_SUPPLIES, ov9282->supplies);
1284
1285 return 0;
1286 }
1287
1288 /**
1289 * ov9282_init_controls() - Initialize sensor subdevice controls
1290 * @ov9282: pointer to ov9282 device
1291 *
1292 * Return: 0 if successful, error code otherwise.
1293 */
ov9282_init_controls(struct ov9282 * ov9282)1294 static int ov9282_init_controls(struct ov9282 *ov9282)
1295 {
1296 struct v4l2_ctrl_handler *ctrl_hdlr = &ov9282->ctrl_handler;
1297 const struct ov9282_mode *mode = ov9282->cur_mode;
1298 struct v4l2_fwnode_device_properties props;
1299 u32 hblank_min;
1300 u32 lpfr;
1301 int ret;
1302
1303 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
1304 if (ret)
1305 return ret;
1306
1307 /* Serialize controls with sensor device */
1308 ctrl_hdlr->lock = &ov9282->mutex;
1309
1310 /* Initialize exposure and gain */
1311 lpfr = mode->vblank + mode->height;
1312 ov9282->exp_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1313 &ov9282_ctrl_ops,
1314 V4L2_CID_EXPOSURE,
1315 OV9282_EXPOSURE_MIN,
1316 lpfr - OV9282_EXPOSURE_OFFSET,
1317 OV9282_EXPOSURE_STEP,
1318 OV9282_EXPOSURE_DEFAULT);
1319
1320 ov9282->again_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1321 &ov9282_ctrl_ops,
1322 V4L2_CID_ANALOGUE_GAIN,
1323 OV9282_AGAIN_MIN,
1324 OV9282_AGAIN_MAX,
1325 OV9282_AGAIN_STEP,
1326 OV9282_AGAIN_DEFAULT);
1327
1328 v4l2_ctrl_cluster(2, &ov9282->exp_ctrl);
1329
1330 ov9282->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1331 &ov9282_ctrl_ops,
1332 V4L2_CID_VBLANK,
1333 mode->vblank_min,
1334 mode->vblank_max,
1335 1, mode->vblank);
1336
1337 v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_VFLIP,
1338 0, 1, 1, 1);
1339
1340 v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops, V4L2_CID_HFLIP,
1341 0, 1, 1, 1);
1342
1343 /* Read only controls */
1344 ov9282->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov9282_ctrl_ops,
1345 V4L2_CID_PIXEL_RATE,
1346 OV9282_PIXEL_RATE_10BIT,
1347 OV9282_PIXEL_RATE_10BIT, 1,
1348 OV9282_PIXEL_RATE_10BIT);
1349
1350 ov9282->link_freq_ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr,
1351 &ov9282_ctrl_ops,
1352 V4L2_CID_LINK_FREQ,
1353 ARRAY_SIZE(link_freq) -
1354 1,
1355 mode->link_freq_idx,
1356 link_freq);
1357 if (ov9282->link_freq_ctrl)
1358 ov9282->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
1359
1360 hblank_min = mode->hblank_min[ov9282->noncontinuous_clock ? 0 : 1];
1361 ov9282->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr,
1362 &ov9282_ctrl_ops,
1363 V4L2_CID_HBLANK,
1364 hblank_min,
1365 OV9282_TIMING_HTS_MAX - mode->width,
1366 1, hblank_min);
1367
1368 ret = v4l2_fwnode_device_parse(ov9282->dev, &props);
1369 if (!ret) {
1370 /* Failure sets ctrl_hdlr->error, which we check afterwards anyway */
1371 v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov9282_ctrl_ops,
1372 &props);
1373 }
1374
1375 if (ctrl_hdlr->error || ret) {
1376 dev_err(ov9282->dev, "control init failed: %d",
1377 ctrl_hdlr->error);
1378 v4l2_ctrl_handler_free(ctrl_hdlr);
1379 return ctrl_hdlr->error;
1380 }
1381
1382 ov9282->sd.ctrl_handler = ctrl_hdlr;
1383
1384 return 0;
1385 }
1386
1387 /**
1388 * ov9282_probe() - I2C client device binding
1389 * @client: pointer to i2c client device
1390 *
1391 * Return: 0 if successful, error code otherwise.
1392 */
ov9282_probe(struct i2c_client * client)1393 static int ov9282_probe(struct i2c_client *client)
1394 {
1395 struct ov9282 *ov9282;
1396 int ret;
1397
1398 ov9282 = devm_kzalloc(&client->dev, sizeof(*ov9282), GFP_KERNEL);
1399 if (!ov9282)
1400 return -ENOMEM;
1401
1402 ov9282->dev = &client->dev;
1403
1404 /* Initialize subdev */
1405 v4l2_i2c_subdev_init(&ov9282->sd, client, &ov9282_subdev_ops);
1406 v4l2_i2c_subdev_set_name(&ov9282->sd, client,
1407 device_get_match_data(ov9282->dev), NULL);
1408
1409 ret = ov9282_parse_hw_config(ov9282);
1410 if (ret) {
1411 dev_err(ov9282->dev, "HW configuration is not supported");
1412 return ret;
1413 }
1414
1415 mutex_init(&ov9282->mutex);
1416
1417 ret = ov9282_power_on(ov9282->dev);
1418 if (ret) {
1419 dev_err(ov9282->dev, "failed to power-on the sensor");
1420 goto error_mutex_destroy;
1421 }
1422
1423 /* Check module identity */
1424 ret = ov9282_detect(ov9282);
1425 if (ret) {
1426 dev_err(ov9282->dev, "failed to find sensor: %d", ret);
1427 goto error_power_off;
1428 }
1429
1430 /* Set default mode to first mode */
1431 ov9282->cur_mode = &supported_modes[DEFAULT_MODE];
1432 ov9282->code = MEDIA_BUS_FMT_Y10_1X10;
1433 ov9282->vblank = ov9282->cur_mode->vblank;
1434
1435 ret = ov9282_init_controls(ov9282);
1436 if (ret) {
1437 dev_err(ov9282->dev, "failed to init controls: %d", ret);
1438 goto error_power_off;
1439 }
1440
1441 /* Initialize subdev */
1442 ov9282->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1443 V4L2_SUBDEV_FL_HAS_EVENTS;
1444 ov9282->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1445
1446 /* Initialize source pad */
1447 ov9282->pad.flags = MEDIA_PAD_FL_SOURCE;
1448 ret = media_entity_pads_init(&ov9282->sd.entity, 1, &ov9282->pad);
1449 if (ret) {
1450 dev_err(ov9282->dev, "failed to init entity pads: %d", ret);
1451 goto error_handler_free;
1452 }
1453
1454 ret = v4l2_async_register_subdev_sensor(&ov9282->sd);
1455 if (ret < 0) {
1456 dev_err(ov9282->dev,
1457 "failed to register async subdev: %d", ret);
1458 goto error_media_entity;
1459 }
1460
1461 pm_runtime_set_active(ov9282->dev);
1462 pm_runtime_enable(ov9282->dev);
1463 pm_runtime_idle(ov9282->dev);
1464
1465 return 0;
1466
1467 error_media_entity:
1468 media_entity_cleanup(&ov9282->sd.entity);
1469 error_handler_free:
1470 v4l2_ctrl_handler_free(ov9282->sd.ctrl_handler);
1471 error_power_off:
1472 ov9282_power_off(ov9282->dev);
1473 error_mutex_destroy:
1474 mutex_destroy(&ov9282->mutex);
1475
1476 return ret;
1477 }
1478
1479 /**
1480 * ov9282_remove() - I2C client device unbinding
1481 * @client: pointer to I2C client device
1482 *
1483 * Return: 0 if successful, error code otherwise.
1484 */
ov9282_remove(struct i2c_client * client)1485 static void ov9282_remove(struct i2c_client *client)
1486 {
1487 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1488 struct ov9282 *ov9282 = to_ov9282(sd);
1489
1490 v4l2_async_unregister_subdev(sd);
1491 media_entity_cleanup(&sd->entity);
1492 v4l2_ctrl_handler_free(sd->ctrl_handler);
1493
1494 pm_runtime_disable(&client->dev);
1495 if (!pm_runtime_status_suspended(&client->dev))
1496 ov9282_power_off(&client->dev);
1497 pm_runtime_set_suspended(&client->dev);
1498
1499 mutex_destroy(&ov9282->mutex);
1500 }
1501
1502 static const struct dev_pm_ops ov9282_pm_ops = {
1503 SET_RUNTIME_PM_OPS(ov9282_power_off, ov9282_power_on, NULL)
1504 };
1505
1506 static const struct of_device_id ov9282_of_match[] = {
1507 { .compatible = "ovti,ov9281", .data = "ov9281" },
1508 { .compatible = "ovti,ov9282", .data = "ov9282" },
1509 { }
1510 };
1511
1512 MODULE_DEVICE_TABLE(of, ov9282_of_match);
1513
1514 static struct i2c_driver ov9282_driver = {
1515 .probe = ov9282_probe,
1516 .remove = ov9282_remove,
1517 .driver = {
1518 .name = "ov9282",
1519 .pm = &ov9282_pm_ops,
1520 .of_match_table = ov9282_of_match,
1521 },
1522 };
1523
1524 module_i2c_driver(ov9282_driver);
1525
1526 MODULE_DESCRIPTION("OmniVision ov9282 sensor driver");
1527 MODULE_LICENSE("GPL");
1528