1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * imx274.c - IMX274 CMOS Image Sensor driver
4 *
5 * Copyright (C) 2017, Leopard Imaging, Inc.
6 *
7 * Leon Luo <leonl@leopardimaging.com>
8 * Edwin Zou <edwinz@leopardimaging.com>
9 * Luca Ceresoli <luca@lucaceresoli.net>
10 */
11
12 #include <linux/clk.h>
13 #include <linux/delay.h>
14 #include <linux/gpio.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/i2c.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/of_gpio.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/regmap.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/slab.h>
25 #include <linux/v4l2-mediabus.h>
26 #include <linux/videodev2.h>
27
28 #include <media/v4l2-ctrls.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-subdev.h>
31
32 /*
33 * See "SHR, SVR Setting" in datasheet
34 */
35 #define IMX274_DEFAULT_FRAME_LENGTH (4550)
36 #define IMX274_MAX_FRAME_LENGTH (0x000fffff)
37
38 /*
39 * See "Frame Rate Adjustment" in datasheet
40 */
41 #define IMX274_PIXCLK_CONST1 (72000000)
42 #define IMX274_PIXCLK_CONST2 (1000000)
43
44 /*
45 * The input gain is shifted by IMX274_GAIN_SHIFT to get
46 * decimal number. The real gain is
47 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT)
48 */
49 #define IMX274_GAIN_SHIFT (8)
50 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1)
51
52 /*
53 * See "Analog Gain" and "Digital Gain" in datasheet
54 * min gain is 1X
55 * max gain is calculated based on IMX274_GAIN_REG_MAX
56 */
57 #define IMX274_GAIN_REG_MAX (1957)
58 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT)
59 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\
60 / (2048 - IMX274_GAIN_REG_MAX))
61 #define IMX274_MAX_DIGITAL_GAIN (8)
62 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT)
63 #define IMX274_GAIN_CONST (2048) /* for gain formula */
64
65 /*
66 * 1 line time in us = (HMAX / 72), minimal is 4 lines
67 */
68 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72)
69
70 #define IMX274_MAX_WIDTH (3840)
71 #define IMX274_MAX_HEIGHT (2160)
72 #define IMX274_MAX_FRAME_RATE (120)
73 #define IMX274_MIN_FRAME_RATE (5)
74 #define IMX274_DEF_FRAME_RATE (60)
75
76 /*
77 * register SHR is limited to (SVR value + 1) x VMAX value - 4
78 */
79 #define IMX274_SHR_LIMIT_CONST (4)
80
81 /*
82 * Min and max sensor reset delay (microseconds)
83 */
84 #define IMX274_RESET_DELAY1 (2000)
85 #define IMX274_RESET_DELAY2 (2200)
86
87 /*
88 * shift and mask constants
89 */
90 #define IMX274_SHIFT_8_BITS (8)
91 #define IMX274_SHIFT_16_BITS (16)
92 #define IMX274_MASK_LSB_2_BITS (0x03)
93 #define IMX274_MASK_LSB_3_BITS (0x07)
94 #define IMX274_MASK_LSB_4_BITS (0x0f)
95 #define IMX274_MASK_LSB_8_BITS (0x00ff)
96
97 #define DRIVER_NAME "IMX274"
98
99 /*
100 * IMX274 register definitions
101 */
102 #define IMX274_SHR_REG_MSB 0x300D /* SHR */
103 #define IMX274_SHR_REG_LSB 0x300C /* SHR */
104 #define IMX274_SVR_REG_MSB 0x300F /* SVR */
105 #define IMX274_SVR_REG_LSB 0x300E /* SVR */
106 #define IMX274_HTRIM_EN_REG 0x3037
107 #define IMX274_HTRIM_START_REG_LSB 0x3038
108 #define IMX274_HTRIM_START_REG_MSB 0x3039
109 #define IMX274_HTRIM_END_REG_LSB 0x303A
110 #define IMX274_HTRIM_END_REG_MSB 0x303B
111 #define IMX274_VWIDCUTEN_REG 0x30DD
112 #define IMX274_VWIDCUT_REG_LSB 0x30DE
113 #define IMX274_VWIDCUT_REG_MSB 0x30DF
114 #define IMX274_VWINPOS_REG_LSB 0x30E0
115 #define IMX274_VWINPOS_REG_MSB 0x30E1
116 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130
117 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131
118 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132
119 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133
120 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */
121 #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */
122 #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */
123 #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */
124 #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */
125 #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */
126 #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */
127 #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */
128 #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */
129 #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */
130 #define IMX274_STANDBY_REG 0x3000 /* STANDBY */
131
132 #define IMX274_TABLE_WAIT_MS 0
133 #define IMX274_TABLE_END 1
134
135 /* regulator supplies */
136 static const char * const imx274_supply_names[] = {
137 "vddl", /* IF (1.2V) supply */
138 "vdig", /* Digital Core (1.8V) supply */
139 "vana", /* Analog (2.8V) supply */
140 };
141
142 #define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names)
143
144 /*
145 * imx274 I2C operation related structure
146 */
147 struct reg_8 {
148 u16 addr;
149 u8 val;
150 };
151
152 static const struct regmap_config imx274_regmap_config = {
153 .reg_bits = 16,
154 .val_bits = 8,
155 .cache_type = REGCACHE_RBTREE,
156 };
157
158 /*
159 * Parameters for each imx274 readout mode.
160 *
161 * These are the values to configure the sensor in one of the
162 * implemented modes.
163 *
164 * @init_regs: registers to initialize the mode
165 * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280)
166 * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720)
167 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate
168 * Adjustment (CSI-2)" in the datasheet)
169 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the
170 * datasheet)
171 * @max_fps: Maximum frames per second
172 * @nocpiop: Number of clocks per internal offset period (see "Integration Time
173 * in Each Readout Drive Mode (CSI-2)" in the datasheet)
174 */
175 struct imx274_mode {
176 const struct reg_8 *init_regs;
177 u8 wbin_ratio;
178 u8 hbin_ratio;
179 int min_frame_len;
180 int min_SHR;
181 int max_fps;
182 int nocpiop;
183 };
184
185 /*
186 * imx274 test pattern related structure
187 */
188 enum {
189 TEST_PATTERN_DISABLED = 0,
190 TEST_PATTERN_ALL_000H,
191 TEST_PATTERN_ALL_FFFH,
192 TEST_PATTERN_ALL_555H,
193 TEST_PATTERN_ALL_AAAH,
194 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */
195 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */
196 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */
197 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */
198 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */
199 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */
200 TEST_PATTERN_H_COLOR_BARS,
201 TEST_PATTERN_V_COLOR_BARS,
202 };
203
204 static const char * const tp_qmenu[] = {
205 "Disabled",
206 "All 000h Pattern",
207 "All FFFh Pattern",
208 "All 555h Pattern",
209 "All AAAh Pattern",
210 "Vertical Stripe (555h / AAAh)",
211 "Vertical Stripe (AAAh / 555h)",
212 "Vertical Stripe (000h / 555h)",
213 "Vertical Stripe (555h / 000h)",
214 "Vertical Stripe (000h / FFFh)",
215 "Vertical Stripe (FFFh / 000h)",
216 "Vertical Color Bars",
217 "Horizontal Color Bars",
218 };
219
220 /*
221 * All-pixel scan mode (10-bit)
222 * imx274 mode1(refer to datasheet) register configuration with
223 * 3840x2160 resolution, raw10 data and mipi four lane output
224 */
225 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = {
226 {0x3004, 0x01},
227 {0x3005, 0x01},
228 {0x3006, 0x00},
229 {0x3007, 0xa2},
230
231 {0x3018, 0xA2}, /* output XVS, HVS */
232
233 {0x306B, 0x05},
234 {0x30E2, 0x01},
235
236 {0x30EE, 0x01},
237 {0x3342, 0x0A},
238 {0x3343, 0x00},
239 {0x3344, 0x16},
240 {0x3345, 0x00},
241 {0x33A6, 0x01},
242 {0x3528, 0x0E},
243 {0x3554, 0x1F},
244 {0x3555, 0x01},
245 {0x3556, 0x01},
246 {0x3557, 0x01},
247 {0x3558, 0x01},
248 {0x3559, 0x00},
249 {0x355A, 0x00},
250 {0x35BA, 0x0E},
251 {0x366A, 0x1B},
252 {0x366B, 0x1A},
253 {0x366C, 0x19},
254 {0x366D, 0x17},
255 {0x3A41, 0x08},
256
257 {IMX274_TABLE_END, 0x00}
258 };
259
260 /*
261 * Horizontal/vertical 2/2-line binning
262 * (Horizontal and vertical weightedbinning, 10-bit)
263 * imx274 mode3(refer to datasheet) register configuration with
264 * 1920x1080 resolution, raw10 data and mipi four lane output
265 */
266 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = {
267 {0x3004, 0x02},
268 {0x3005, 0x21},
269 {0x3006, 0x00},
270 {0x3007, 0xb1},
271
272 {0x3018, 0xA2}, /* output XVS, HVS */
273
274 {0x306B, 0x05},
275 {0x30E2, 0x02},
276
277 {0x30EE, 0x01},
278 {0x3342, 0x0A},
279 {0x3343, 0x00},
280 {0x3344, 0x1A},
281 {0x3345, 0x00},
282 {0x33A6, 0x01},
283 {0x3528, 0x0E},
284 {0x3554, 0x00},
285 {0x3555, 0x01},
286 {0x3556, 0x01},
287 {0x3557, 0x01},
288 {0x3558, 0x01},
289 {0x3559, 0x00},
290 {0x355A, 0x00},
291 {0x35BA, 0x0E},
292 {0x366A, 0x1B},
293 {0x366B, 0x1A},
294 {0x366C, 0x19},
295 {0x366D, 0x17},
296 {0x3A41, 0x08},
297
298 {IMX274_TABLE_END, 0x00}
299 };
300
301 /*
302 * Vertical 2/3 subsampling binning horizontal 3 binning
303 * imx274 mode5(refer to datasheet) register configuration with
304 * 1280x720 resolution, raw10 data and mipi four lane output
305 */
306 static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
307 {0x3004, 0x03},
308 {0x3005, 0x31},
309 {0x3006, 0x00},
310 {0x3007, 0xa9},
311
312 {0x3018, 0xA2}, /* output XVS, HVS */
313
314 {0x306B, 0x05},
315 {0x30E2, 0x03},
316
317 {0x30EE, 0x01},
318 {0x3342, 0x0A},
319 {0x3343, 0x00},
320 {0x3344, 0x1B},
321 {0x3345, 0x00},
322 {0x33A6, 0x01},
323 {0x3528, 0x0E},
324 {0x3554, 0x00},
325 {0x3555, 0x01},
326 {0x3556, 0x01},
327 {0x3557, 0x01},
328 {0x3558, 0x01},
329 {0x3559, 0x00},
330 {0x355A, 0x00},
331 {0x35BA, 0x0E},
332 {0x366A, 0x1B},
333 {0x366B, 0x19},
334 {0x366C, 0x17},
335 {0x366D, 0x17},
336 {0x3A41, 0x04},
337
338 {IMX274_TABLE_END, 0x00}
339 };
340
341 /*
342 * Vertical 2/8 subsampling horizontal 3 binning
343 * imx274 mode6(refer to datasheet) register configuration with
344 * 1280x540 resolution, raw10 data and mipi four lane output
345 */
346 static const struct reg_8 imx274_mode6_1280x540_raw10[] = {
347 {0x3004, 0x04}, /* mode setting */
348 {0x3005, 0x31},
349 {0x3006, 0x00},
350 {0x3007, 0x02}, /* mode setting */
351
352 {0x3018, 0xA2}, /* output XVS, HVS */
353
354 {0x306B, 0x05},
355 {0x30E2, 0x04}, /* mode setting */
356
357 {0x30EE, 0x01},
358 {0x3342, 0x0A},
359 {0x3343, 0x00},
360 {0x3344, 0x16},
361 {0x3345, 0x00},
362 {0x33A6, 0x01},
363 {0x3528, 0x0E},
364 {0x3554, 0x1F},
365 {0x3555, 0x01},
366 {0x3556, 0x01},
367 {0x3557, 0x01},
368 {0x3558, 0x01},
369 {0x3559, 0x00},
370 {0x355A, 0x00},
371 {0x35BA, 0x0E},
372 {0x366A, 0x1B},
373 {0x366B, 0x1A},
374 {0x366C, 0x19},
375 {0x366D, 0x17},
376 {0x3A41, 0x04},
377
378 {IMX274_TABLE_END, 0x00}
379 };
380
381 /*
382 * imx274 first step register configuration for
383 * starting stream
384 */
385 static const struct reg_8 imx274_start_1[] = {
386 {IMX274_STANDBY_REG, 0x12},
387
388 /* PLRD: clock settings */
389 {0x3120, 0xF0},
390 {0x3121, 0x00},
391 {0x3122, 0x02},
392 {0x3129, 0x9C},
393 {0x312A, 0x02},
394 {0x312D, 0x02},
395
396 {0x310B, 0x00},
397
398 /* PLSTMG */
399 {0x304C, 0x00}, /* PLSTMG01 */
400 {0x304D, 0x03},
401 {0x331C, 0x1A},
402 {0x331D, 0x00},
403 {0x3502, 0x02},
404 {0x3529, 0x0E},
405 {0x352A, 0x0E},
406 {0x352B, 0x0E},
407 {0x3538, 0x0E},
408 {0x3539, 0x0E},
409 {0x3553, 0x00},
410 {0x357D, 0x05},
411 {0x357F, 0x05},
412 {0x3581, 0x04},
413 {0x3583, 0x76},
414 {0x3587, 0x01},
415 {0x35BB, 0x0E},
416 {0x35BC, 0x0E},
417 {0x35BD, 0x0E},
418 {0x35BE, 0x0E},
419 {0x35BF, 0x0E},
420 {0x366E, 0x00},
421 {0x366F, 0x00},
422 {0x3670, 0x00},
423 {0x3671, 0x00},
424
425 /* PSMIPI */
426 {0x3304, 0x32}, /* PSMIPI1 */
427 {0x3305, 0x00},
428 {0x3306, 0x32},
429 {0x3307, 0x00},
430 {0x3590, 0x32},
431 {0x3591, 0x00},
432 {0x3686, 0x32},
433 {0x3687, 0x00},
434
435 {IMX274_TABLE_END, 0x00}
436 };
437
438 /*
439 * imx274 second step register configuration for
440 * starting stream
441 */
442 static const struct reg_8 imx274_start_2[] = {
443 {IMX274_STANDBY_REG, 0x00},
444 {0x303E, 0x02}, /* SYS_MODE = 2 */
445 {IMX274_TABLE_END, 0x00}
446 };
447
448 /*
449 * imx274 third step register configuration for
450 * starting stream
451 */
452 static const struct reg_8 imx274_start_3[] = {
453 {0x30F4, 0x00},
454 {0x3018, 0xA2}, /* XHS VHS OUTPUT */
455 {IMX274_TABLE_END, 0x00}
456 };
457
458 /*
459 * imx274 register configuration for stopping stream
460 */
461 static const struct reg_8 imx274_stop[] = {
462 {IMX274_STANDBY_REG, 0x01},
463 {IMX274_TABLE_END, 0x00}
464 };
465
466 /*
467 * imx274 disable test pattern register configuration
468 */
469 static const struct reg_8 imx274_tp_disabled[] = {
470 {0x303C, 0x00},
471 {0x377F, 0x00},
472 {0x3781, 0x00},
473 {0x370B, 0x00},
474 {IMX274_TABLE_END, 0x00}
475 };
476
477 /*
478 * imx274 test pattern register configuration
479 * reg 0x303D defines the test pattern modes
480 */
481 static const struct reg_8 imx274_tp_regs[] = {
482 {0x303C, 0x11},
483 {0x370E, 0x01},
484 {0x377F, 0x01},
485 {0x3781, 0x01},
486 {0x370B, 0x11},
487 {IMX274_TABLE_END, 0x00}
488 };
489
490 /* nocpiop happens to be the same number for the implemented modes */
491 static const struct imx274_mode imx274_modes[] = {
492 {
493 /* mode 1, 4K */
494 .wbin_ratio = 1, /* 3840 */
495 .hbin_ratio = 1, /* 2160 */
496 .init_regs = imx274_mode1_3840x2160_raw10,
497 .min_frame_len = 4550,
498 .min_SHR = 12,
499 .max_fps = 60,
500 .nocpiop = 112,
501 },
502 {
503 /* mode 3, 1080p */
504 .wbin_ratio = 2, /* 1920 */
505 .hbin_ratio = 2, /* 1080 */
506 .init_regs = imx274_mode3_1920x1080_raw10,
507 .min_frame_len = 2310,
508 .min_SHR = 8,
509 .max_fps = 120,
510 .nocpiop = 112,
511 },
512 {
513 /* mode 5, 720p */
514 .wbin_ratio = 3, /* 1280 */
515 .hbin_ratio = 3, /* 720 */
516 .init_regs = imx274_mode5_1280x720_raw10,
517 .min_frame_len = 2310,
518 .min_SHR = 8,
519 .max_fps = 120,
520 .nocpiop = 112,
521 },
522 {
523 /* mode 6, 540p */
524 .wbin_ratio = 3, /* 1280 */
525 .hbin_ratio = 4, /* 540 */
526 .init_regs = imx274_mode6_1280x540_raw10,
527 .min_frame_len = 2310,
528 .min_SHR = 4,
529 .max_fps = 120,
530 .nocpiop = 112,
531 },
532 };
533
534 /*
535 * struct imx274_ctrls - imx274 ctrl structure
536 * @handler: V4L2 ctrl handler structure
537 * @exposure: Pointer to expsure ctrl structure
538 * @gain: Pointer to gain ctrl structure
539 * @vflip: Pointer to vflip ctrl structure
540 * @test_pattern: Pointer to test pattern ctrl structure
541 */
542 struct imx274_ctrls {
543 struct v4l2_ctrl_handler handler;
544 struct v4l2_ctrl *exposure;
545 struct v4l2_ctrl *gain;
546 struct v4l2_ctrl *vflip;
547 struct v4l2_ctrl *test_pattern;
548 };
549
550 /*
551 * struct stim274 - imx274 device structure
552 * @sd: V4L2 subdevice structure
553 * @pad: Media pad structure
554 * @client: Pointer to I2C client
555 * @ctrls: imx274 control structure
556 * @crop: rect to be captured
557 * @compose: compose rect, i.e. output resolution
558 * @format: V4L2 media bus frame format structure
559 * (width and height are in sync with the compose rect)
560 * @frame_rate: V4L2 frame rate structure
561 * @regmap: Pointer to regmap structure
562 * @reset_gpio: Pointer to reset gpio
563 * @supplies: List of analog and digital supply regulators
564 * @inck: Pointer to sensor input clock
565 * @lock: Mutex structure
566 * @mode: Parameters for the selected readout mode
567 */
568 struct stimx274 {
569 struct v4l2_subdev sd;
570 struct media_pad pad;
571 struct i2c_client *client;
572 struct imx274_ctrls ctrls;
573 struct v4l2_rect crop;
574 struct v4l2_mbus_framefmt format;
575 struct v4l2_fract frame_interval;
576 struct regmap *regmap;
577 struct gpio_desc *reset_gpio;
578 struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES];
579 struct clk *inck;
580 struct mutex lock; /* mutex lock for operations */
581 const struct imx274_mode *mode;
582 };
583
584 #define IMX274_ROUND(dim, step, flags) \
585 ((flags) & V4L2_SEL_FLAG_GE \
586 ? roundup((dim), (step)) \
587 : ((flags) & V4L2_SEL_FLAG_LE \
588 ? rounddown((dim), (step)) \
589 : rounddown((dim) + (step) / 2, (step))))
590
591 /*
592 * Function declaration
593 */
594 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl);
595 static int imx274_set_exposure(struct stimx274 *priv, int val);
596 static int imx274_set_vflip(struct stimx274 *priv, int val);
597 static int imx274_set_test_pattern(struct stimx274 *priv, int val);
598 static int imx274_set_frame_interval(struct stimx274 *priv,
599 struct v4l2_fract frame_interval);
600
msleep_range(unsigned int delay_base)601 static inline void msleep_range(unsigned int delay_base)
602 {
603 usleep_range(delay_base * 1000, delay_base * 1000 + 500);
604 }
605
606 /*
607 * v4l2_ctrl and v4l2_subdev related operations
608 */
ctrl_to_sd(struct v4l2_ctrl * ctrl)609 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
610 {
611 return &container_of(ctrl->handler,
612 struct stimx274, ctrls.handler)->sd;
613 }
614
to_imx274(struct v4l2_subdev * sd)615 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd)
616 {
617 return container_of(sd, struct stimx274, sd);
618 }
619
620 /*
621 * Writing a register table
622 *
623 * @priv: Pointer to device
624 * @table: Table containing register values (with optional delays)
625 *
626 * This is used to write register table into sensor's reg map.
627 *
628 * Return: 0 on success, errors otherwise
629 */
imx274_write_table(struct stimx274 * priv,const struct reg_8 table[])630 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[])
631 {
632 struct regmap *regmap = priv->regmap;
633 int err = 0;
634 const struct reg_8 *next;
635 u8 val;
636
637 int range_start = -1;
638 int range_count = 0;
639 u8 range_vals[16];
640 int max_range_vals = ARRAY_SIZE(range_vals);
641
642 for (next = table;; next++) {
643 if ((next->addr != range_start + range_count) ||
644 (next->addr == IMX274_TABLE_END) ||
645 (next->addr == IMX274_TABLE_WAIT_MS) ||
646 (range_count == max_range_vals)) {
647 if (range_count == 1)
648 err = regmap_write(regmap,
649 range_start, range_vals[0]);
650 else if (range_count > 1)
651 err = regmap_bulk_write(regmap, range_start,
652 &range_vals[0],
653 range_count);
654 else
655 err = 0;
656
657 if (err)
658 return err;
659
660 range_start = -1;
661 range_count = 0;
662
663 /* Handle special address values */
664 if (next->addr == IMX274_TABLE_END)
665 break;
666
667 if (next->addr == IMX274_TABLE_WAIT_MS) {
668 msleep_range(next->val);
669 continue;
670 }
671 }
672
673 val = next->val;
674
675 if (range_start == -1)
676 range_start = next->addr;
677
678 range_vals[range_count++] = val;
679 }
680 return 0;
681 }
682
imx274_write_reg(struct stimx274 * priv,u16 addr,u8 val)683 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val)
684 {
685 int err;
686
687 err = regmap_write(priv->regmap, addr, val);
688 if (err)
689 dev_err(&priv->client->dev,
690 "%s : i2c write failed, %x = %x\n", __func__,
691 addr, val);
692 else
693 dev_dbg(&priv->client->dev,
694 "%s : addr 0x%x, val=0x%x\n", __func__,
695 addr, val);
696 return err;
697 }
698
699 /**
700 * imx274_read_mbreg - Read a multibyte register.
701 *
702 * Uses a bulk read where possible.
703 *
704 * @priv: Pointer to device structure
705 * @addr: Address of the LSB register. Other registers must be
706 * consecutive, least-to-most significant.
707 * @val: Pointer to store the register value (cpu endianness)
708 * @nbytes: Number of bytes to read (range: [1..3]).
709 * Other bytes are zet to 0.
710 *
711 * Return: 0 on success, errors otherwise
712 */
imx274_read_mbreg(struct stimx274 * priv,u16 addr,u32 * val,size_t nbytes)713 static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val,
714 size_t nbytes)
715 {
716 __le32 val_le = 0;
717 int err;
718
719 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes);
720 if (err) {
721 dev_err(&priv->client->dev,
722 "%s : i2c bulk read failed, %x (%zu bytes)\n",
723 __func__, addr, nbytes);
724 } else {
725 *val = le32_to_cpu(val_le);
726 dev_dbg(&priv->client->dev,
727 "%s : addr 0x%x, val=0x%x (%zu bytes)\n",
728 __func__, addr, *val, nbytes);
729 }
730
731 return err;
732 }
733
734 /**
735 * imx274_write_mbreg - Write a multibyte register.
736 *
737 * Uses a bulk write where possible.
738 *
739 * @priv: Pointer to device structure
740 * @addr: Address of the LSB register. Other registers must be
741 * consecutive, least-to-most significant.
742 * @val: Value to be written to the register (cpu endianness)
743 * @nbytes: Number of bytes to write (range: [1..3])
744 */
imx274_write_mbreg(struct stimx274 * priv,u16 addr,u32 val,size_t nbytes)745 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val,
746 size_t nbytes)
747 {
748 __le32 val_le = cpu_to_le32(val);
749 int err;
750
751 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes);
752 if (err)
753 dev_err(&priv->client->dev,
754 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n",
755 __func__, addr, val, nbytes);
756 else
757 dev_dbg(&priv->client->dev,
758 "%s : addr 0x%x, val=0x%x (%zu bytes)\n",
759 __func__, addr, val, nbytes);
760 return err;
761 }
762
763 /*
764 * Set mode registers to start stream.
765 * @priv: Pointer to device structure
766 *
767 * Return: 0 on success, errors otherwise
768 */
imx274_mode_regs(struct stimx274 * priv)769 static int imx274_mode_regs(struct stimx274 *priv)
770 {
771 int err = 0;
772
773 err = imx274_write_table(priv, imx274_start_1);
774 if (err)
775 return err;
776
777 err = imx274_write_table(priv, priv->mode->init_regs);
778
779 return err;
780 }
781
782 /*
783 * imx274_start_stream - Function for starting stream per mode index
784 * @priv: Pointer to device structure
785 *
786 * Return: 0 on success, errors otherwise
787 */
imx274_start_stream(struct stimx274 * priv)788 static int imx274_start_stream(struct stimx274 *priv)
789 {
790 int err = 0;
791
792 err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler);
793 if (err) {
794 dev_err(&priv->client->dev, "Error %d setup controls\n", err);
795 return err;
796 }
797
798 /*
799 * Refer to "Standby Cancel Sequence when using CSI-2" in
800 * imx274 datasheet, it should wait 10ms or more here.
801 * give it 1 extra ms for margin
802 */
803 msleep_range(11);
804 err = imx274_write_table(priv, imx274_start_2);
805 if (err)
806 return err;
807
808 /*
809 * Refer to "Standby Cancel Sequence when using CSI-2" in
810 * imx274 datasheet, it should wait 7ms or more here.
811 * give it 1 extra ms for margin
812 */
813 msleep_range(8);
814 err = imx274_write_table(priv, imx274_start_3);
815 if (err)
816 return err;
817
818 return 0;
819 }
820
821 /*
822 * imx274_reset - Function called to reset the sensor
823 * @priv: Pointer to device structure
824 * @rst: Input value for determining the sensor's end state after reset
825 *
826 * Set the senor in reset and then
827 * if rst = 0, keep it in reset;
828 * if rst = 1, bring it out of reset.
829 *
830 */
imx274_reset(struct stimx274 * priv,int rst)831 static void imx274_reset(struct stimx274 *priv, int rst)
832 {
833 gpiod_set_value_cansleep(priv->reset_gpio, 0);
834 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
835 gpiod_set_value_cansleep(priv->reset_gpio, !!rst);
836 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
837 }
838
imx274_power_on(struct device * dev)839 static int imx274_power_on(struct device *dev)
840 {
841 struct i2c_client *client = to_i2c_client(dev);
842 struct v4l2_subdev *sd = i2c_get_clientdata(client);
843 struct stimx274 *imx274 = to_imx274(sd);
844 int ret;
845
846 /* keep sensor in reset before power on */
847 imx274_reset(imx274, 0);
848
849 ret = clk_prepare_enable(imx274->inck);
850 if (ret) {
851 dev_err(&imx274->client->dev,
852 "Failed to enable input clock: %d\n", ret);
853 return ret;
854 }
855
856 ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies);
857 if (ret) {
858 dev_err(&imx274->client->dev,
859 "Failed to enable regulators: %d\n", ret);
860 goto fail_reg;
861 }
862
863 udelay(2);
864 imx274_reset(imx274, 1);
865
866 return 0;
867
868 fail_reg:
869 clk_disable_unprepare(imx274->inck);
870 return ret;
871 }
872
imx274_power_off(struct device * dev)873 static int imx274_power_off(struct device *dev)
874 {
875 struct i2c_client *client = to_i2c_client(dev);
876 struct v4l2_subdev *sd = i2c_get_clientdata(client);
877 struct stimx274 *imx274 = to_imx274(sd);
878
879 imx274_reset(imx274, 0);
880
881 regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies);
882
883 clk_disable_unprepare(imx274->inck);
884
885 return 0;
886 }
887
imx274_regulators_get(struct device * dev,struct stimx274 * imx274)888 static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274)
889 {
890 unsigned int i;
891
892 for (i = 0; i < IMX274_NUM_SUPPLIES; i++)
893 imx274->supplies[i].supply = imx274_supply_names[i];
894
895 return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES,
896 imx274->supplies);
897 }
898
899 /**
900 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls
901 * @ctrl: V4L2 control to be set
902 *
903 * This function is used to set the V4L2 controls for the imx274 sensor.
904 *
905 * Return: 0 on success, errors otherwise
906 */
imx274_s_ctrl(struct v4l2_ctrl * ctrl)907 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl)
908 {
909 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
910 struct stimx274 *imx274 = to_imx274(sd);
911 int ret = -EINVAL;
912
913 if (!pm_runtime_get_if_in_use(&imx274->client->dev))
914 return 0;
915
916 dev_dbg(&imx274->client->dev,
917 "%s : s_ctrl: %s, value: %d\n", __func__,
918 ctrl->name, ctrl->val);
919
920 switch (ctrl->id) {
921 case V4L2_CID_EXPOSURE:
922 dev_dbg(&imx274->client->dev,
923 "%s : set V4L2_CID_EXPOSURE\n", __func__);
924 ret = imx274_set_exposure(imx274, ctrl->val);
925 break;
926
927 case V4L2_CID_GAIN:
928 dev_dbg(&imx274->client->dev,
929 "%s : set V4L2_CID_GAIN\n", __func__);
930 ret = imx274_set_gain(imx274, ctrl);
931 break;
932
933 case V4L2_CID_VFLIP:
934 dev_dbg(&imx274->client->dev,
935 "%s : set V4L2_CID_VFLIP\n", __func__);
936 ret = imx274_set_vflip(imx274, ctrl->val);
937 break;
938
939 case V4L2_CID_TEST_PATTERN:
940 dev_dbg(&imx274->client->dev,
941 "%s : set V4L2_CID_TEST_PATTERN\n", __func__);
942 ret = imx274_set_test_pattern(imx274, ctrl->val);
943 break;
944 }
945
946 pm_runtime_put(&imx274->client->dev);
947
948 return ret;
949 }
950
imx274_binning_goodness(struct stimx274 * imx274,int w,int ask_w,int h,int ask_h,u32 flags)951 static int imx274_binning_goodness(struct stimx274 *imx274,
952 int w, int ask_w,
953 int h, int ask_h, u32 flags)
954 {
955 struct device *dev = &imx274->client->dev;
956 const int goodness = 100000;
957 int val = 0;
958
959 if (flags & V4L2_SEL_FLAG_GE) {
960 if (w < ask_w)
961 val -= goodness;
962 if (h < ask_h)
963 val -= goodness;
964 }
965
966 if (flags & V4L2_SEL_FLAG_LE) {
967 if (w > ask_w)
968 val -= goodness;
969 if (h > ask_h)
970 val -= goodness;
971 }
972
973 val -= abs(w - ask_w);
974 val -= abs(h - ask_h);
975
976 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n",
977 __func__, ask_w, ask_h, w, h, val);
978
979 return val;
980 }
981
982 /**
983 * __imx274_change_compose - Helper function to change binning and set both
984 * compose and format.
985 *
986 * We have two entry points to change binning: set_fmt and
987 * set_selection(COMPOSE). Both have to compute the new output size
988 * and set it in both the compose rect and the frame format size. We
989 * also need to do the same things after setting cropping to restore
990 * 1:1 binning.
991 *
992 * This function contains the common code for these three cases, it
993 * has many arguments in order to accommodate the needs of all of
994 * them.
995 *
996 * Must be called with imx274->lock locked.
997 *
998 * @imx274: The device object
999 * @sd_state: The subdev state we are editing for TRY requests
1000 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller
1001 * @width: Input-output parameter: set to the desired width before
1002 * the call, contains the chosen value after returning successfully
1003 * @height: Input-output parameter for height (see @width)
1004 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not
1005 * available (when called from set_fmt)
1006 */
__imx274_change_compose(struct stimx274 * imx274,struct v4l2_subdev_state * sd_state,u32 which,u32 * width,u32 * height,u32 flags)1007 static int __imx274_change_compose(struct stimx274 *imx274,
1008 struct v4l2_subdev_state *sd_state,
1009 u32 which,
1010 u32 *width,
1011 u32 *height,
1012 u32 flags)
1013 {
1014 struct device *dev = &imx274->client->dev;
1015 const struct v4l2_rect *cur_crop;
1016 struct v4l2_mbus_framefmt *tgt_fmt;
1017 unsigned int i;
1018 const struct imx274_mode *best_mode = &imx274_modes[0];
1019 int best_goodness = INT_MIN;
1020
1021 if (which == V4L2_SUBDEV_FORMAT_TRY) {
1022 cur_crop = &sd_state->pads->try_crop;
1023 tgt_fmt = &sd_state->pads->try_fmt;
1024 } else {
1025 cur_crop = &imx274->crop;
1026 tgt_fmt = &imx274->format;
1027 }
1028
1029 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) {
1030 u8 wratio = imx274_modes[i].wbin_ratio;
1031 u8 hratio = imx274_modes[i].hbin_ratio;
1032
1033 int goodness = imx274_binning_goodness(
1034 imx274,
1035 cur_crop->width / wratio, *width,
1036 cur_crop->height / hratio, *height,
1037 flags);
1038
1039 if (goodness >= best_goodness) {
1040 best_goodness = goodness;
1041 best_mode = &imx274_modes[i];
1042 }
1043 }
1044
1045 *width = cur_crop->width / best_mode->wbin_ratio;
1046 *height = cur_crop->height / best_mode->hbin_ratio;
1047
1048 if (which == V4L2_SUBDEV_FORMAT_ACTIVE)
1049 imx274->mode = best_mode;
1050
1051 dev_dbg(dev, "%s: selected %ux%u binning\n",
1052 __func__, best_mode->wbin_ratio, best_mode->hbin_ratio);
1053
1054 tgt_fmt->width = *width;
1055 tgt_fmt->height = *height;
1056 tgt_fmt->field = V4L2_FIELD_NONE;
1057
1058 return 0;
1059 }
1060
1061 /**
1062 * imx274_get_fmt - Get the pad format
1063 * @sd: Pointer to V4L2 Sub device structure
1064 * @sd_state: Pointer to sub device state structure
1065 * @fmt: Pointer to pad level media bus format
1066 *
1067 * This function is used to get the pad format information.
1068 *
1069 * Return: 0 on success
1070 */
imx274_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1071 static int imx274_get_fmt(struct v4l2_subdev *sd,
1072 struct v4l2_subdev_state *sd_state,
1073 struct v4l2_subdev_format *fmt)
1074 {
1075 struct stimx274 *imx274 = to_imx274(sd);
1076
1077 mutex_lock(&imx274->lock);
1078 fmt->format = imx274->format;
1079 mutex_unlock(&imx274->lock);
1080 return 0;
1081 }
1082
1083 /**
1084 * imx274_set_fmt - This is used to set the pad format
1085 * @sd: Pointer to V4L2 Sub device structure
1086 * @sd_state: Pointer to sub device state information structure
1087 * @format: Pointer to pad level media bus format
1088 *
1089 * This function is used to set the pad format.
1090 *
1091 * Return: 0 on success
1092 */
imx274_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)1093 static int imx274_set_fmt(struct v4l2_subdev *sd,
1094 struct v4l2_subdev_state *sd_state,
1095 struct v4l2_subdev_format *format)
1096 {
1097 struct v4l2_mbus_framefmt *fmt = &format->format;
1098 struct stimx274 *imx274 = to_imx274(sd);
1099 int err = 0;
1100
1101 mutex_lock(&imx274->lock);
1102
1103 err = __imx274_change_compose(imx274, sd_state, format->which,
1104 &fmt->width, &fmt->height, 0);
1105
1106 if (err)
1107 goto out;
1108
1109 /*
1110 * __imx274_change_compose already set width and height in the
1111 * applicable format, but we need to keep all other format
1112 * values, so do a full copy here
1113 */
1114 fmt->field = V4L2_FIELD_NONE;
1115 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
1116 sd_state->pads->try_fmt = *fmt;
1117 else
1118 imx274->format = *fmt;
1119
1120 out:
1121 mutex_unlock(&imx274->lock);
1122
1123 return err;
1124 }
1125
imx274_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1126 static int imx274_get_selection(struct v4l2_subdev *sd,
1127 struct v4l2_subdev_state *sd_state,
1128 struct v4l2_subdev_selection *sel)
1129 {
1130 struct stimx274 *imx274 = to_imx274(sd);
1131 const struct v4l2_rect *src_crop;
1132 const struct v4l2_mbus_framefmt *src_fmt;
1133 int ret = 0;
1134
1135 if (sel->pad != 0)
1136 return -EINVAL;
1137
1138 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {
1139 sel->r.left = 0;
1140 sel->r.top = 0;
1141 sel->r.width = IMX274_MAX_WIDTH;
1142 sel->r.height = IMX274_MAX_HEIGHT;
1143 return 0;
1144 }
1145
1146 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1147 src_crop = &sd_state->pads->try_crop;
1148 src_fmt = &sd_state->pads->try_fmt;
1149 } else {
1150 src_crop = &imx274->crop;
1151 src_fmt = &imx274->format;
1152 }
1153
1154 mutex_lock(&imx274->lock);
1155
1156 switch (sel->target) {
1157 case V4L2_SEL_TGT_CROP:
1158 sel->r = *src_crop;
1159 break;
1160 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1161 sel->r.top = 0;
1162 sel->r.left = 0;
1163 sel->r.width = src_crop->width;
1164 sel->r.height = src_crop->height;
1165 break;
1166 case V4L2_SEL_TGT_COMPOSE:
1167 sel->r.top = 0;
1168 sel->r.left = 0;
1169 sel->r.width = src_fmt->width;
1170 sel->r.height = src_fmt->height;
1171 break;
1172 default:
1173 ret = -EINVAL;
1174 }
1175
1176 mutex_unlock(&imx274->lock);
1177
1178 return ret;
1179 }
1180
imx274_set_selection_crop(struct stimx274 * imx274,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1181 static int imx274_set_selection_crop(struct stimx274 *imx274,
1182 struct v4l2_subdev_state *sd_state,
1183 struct v4l2_subdev_selection *sel)
1184 {
1185 struct v4l2_rect *tgt_crop;
1186 struct v4l2_rect new_crop;
1187 bool size_changed;
1188
1189 /*
1190 * h_step could be 12 or 24 depending on the binning. But we
1191 * won't know the binning until we choose the mode later in
1192 * __imx274_change_compose(). Thus let's be safe and use the
1193 * most conservative value in all cases.
1194 */
1195 const u32 h_step = 24;
1196
1197 new_crop.width = min_t(u32,
1198 IMX274_ROUND(sel->r.width, h_step, sel->flags),
1199 IMX274_MAX_WIDTH);
1200
1201 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */
1202 if (new_crop.width < 144)
1203 new_crop.width = 144;
1204
1205 new_crop.left = min_t(u32,
1206 IMX274_ROUND(sel->r.left, h_step, 0),
1207 IMX274_MAX_WIDTH - new_crop.width);
1208
1209 new_crop.height = min_t(u32,
1210 IMX274_ROUND(sel->r.height, 2, sel->flags),
1211 IMX274_MAX_HEIGHT);
1212
1213 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0),
1214 IMX274_MAX_HEIGHT - new_crop.height);
1215
1216 sel->r = new_crop;
1217
1218 if (sel->which == V4L2_SUBDEV_FORMAT_TRY)
1219 tgt_crop = &sd_state->pads->try_crop;
1220 else
1221 tgt_crop = &imx274->crop;
1222
1223 mutex_lock(&imx274->lock);
1224
1225 size_changed = (new_crop.width != tgt_crop->width ||
1226 new_crop.height != tgt_crop->height);
1227
1228 /* __imx274_change_compose needs the new size in *tgt_crop */
1229 *tgt_crop = new_crop;
1230
1231 /* if crop size changed then reset the output image size */
1232 if (size_changed)
1233 __imx274_change_compose(imx274, sd_state, sel->which,
1234 &new_crop.width, &new_crop.height,
1235 sel->flags);
1236
1237 mutex_unlock(&imx274->lock);
1238
1239 return 0;
1240 }
1241
imx274_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1242 static int imx274_set_selection(struct v4l2_subdev *sd,
1243 struct v4l2_subdev_state *sd_state,
1244 struct v4l2_subdev_selection *sel)
1245 {
1246 struct stimx274 *imx274 = to_imx274(sd);
1247
1248 if (sel->pad != 0)
1249 return -EINVAL;
1250
1251 if (sel->target == V4L2_SEL_TGT_CROP)
1252 return imx274_set_selection_crop(imx274, sd_state, sel);
1253
1254 if (sel->target == V4L2_SEL_TGT_COMPOSE) {
1255 int err;
1256
1257 mutex_lock(&imx274->lock);
1258 err = __imx274_change_compose(imx274, sd_state, sel->which,
1259 &sel->r.width, &sel->r.height,
1260 sel->flags);
1261 mutex_unlock(&imx274->lock);
1262
1263 /*
1264 * __imx274_change_compose already set width and
1265 * height in set->r, we still need to set top-left
1266 */
1267 if (!err) {
1268 sel->r.top = 0;
1269 sel->r.left = 0;
1270 }
1271
1272 return err;
1273 }
1274
1275 return -EINVAL;
1276 }
1277
imx274_apply_trimming(struct stimx274 * imx274)1278 static int imx274_apply_trimming(struct stimx274 *imx274)
1279 {
1280 u32 h_start;
1281 u32 h_end;
1282 u32 hmax;
1283 u32 v_cut;
1284 s32 v_pos;
1285 u32 write_v_size;
1286 u32 y_out_size;
1287 int err;
1288
1289 h_start = imx274->crop.left + 12;
1290 h_end = h_start + imx274->crop.width;
1291
1292 /* Use the minimum allowed value of HMAX */
1293 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */
1294 /* Note: 260 is the minimum HMAX in all implemented modes */
1295 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23);
1296
1297 /* invert v_pos if VFLIP */
1298 v_pos = imx274->ctrls.vflip->cur.val ?
1299 (-imx274->crop.top / 2) : (imx274->crop.top / 2);
1300 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2;
1301 write_v_size = imx274->crop.height + 22;
1302 y_out_size = imx274->crop.height;
1303
1304 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2);
1305 if (!err)
1306 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1);
1307 if (!err)
1308 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB,
1309 h_start, 2);
1310 if (!err)
1311 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB,
1312 h_end, 2);
1313 if (!err)
1314 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1);
1315 if (!err)
1316 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB,
1317 v_cut, 2);
1318 if (!err)
1319 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB,
1320 v_pos, 2);
1321 if (!err)
1322 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB,
1323 write_v_size, 2);
1324 if (!err)
1325 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB,
1326 y_out_size, 2);
1327
1328 return err;
1329 }
1330
1331 /**
1332 * imx274_g_frame_interval - Get the frame interval
1333 * @sd: Pointer to V4L2 Sub device structure
1334 * @fi: Pointer to V4l2 Sub device frame interval structure
1335 *
1336 * This function is used to get the frame interval.
1337 *
1338 * Return: 0 on success
1339 */
imx274_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)1340 static int imx274_g_frame_interval(struct v4l2_subdev *sd,
1341 struct v4l2_subdev_frame_interval *fi)
1342 {
1343 struct stimx274 *imx274 = to_imx274(sd);
1344
1345 fi->interval = imx274->frame_interval;
1346 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n",
1347 __func__, imx274->frame_interval.numerator,
1348 imx274->frame_interval.denominator);
1349
1350 return 0;
1351 }
1352
1353 /**
1354 * imx274_s_frame_interval - Set the frame interval
1355 * @sd: Pointer to V4L2 Sub device structure
1356 * @fi: Pointer to V4l2 Sub device frame interval structure
1357 *
1358 * This function is used to set the frame intervavl.
1359 *
1360 * Return: 0 on success
1361 */
imx274_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * fi)1362 static int imx274_s_frame_interval(struct v4l2_subdev *sd,
1363 struct v4l2_subdev_frame_interval *fi)
1364 {
1365 struct stimx274 *imx274 = to_imx274(sd);
1366 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure;
1367 int min, max, def;
1368 int ret;
1369
1370 ret = pm_runtime_resume_and_get(&imx274->client->dev);
1371 if (ret < 0)
1372 return ret;
1373
1374 mutex_lock(&imx274->lock);
1375 ret = imx274_set_frame_interval(imx274, fi->interval);
1376
1377 if (!ret) {
1378 fi->interval = imx274->frame_interval;
1379
1380 /*
1381 * exposure time range is decided by frame interval
1382 * need to update it after frame interval changes
1383 */
1384 min = IMX274_MIN_EXPOSURE_TIME;
1385 max = fi->interval.numerator * 1000000
1386 / fi->interval.denominator;
1387 def = max;
1388 ret = __v4l2_ctrl_modify_range(ctrl, min, max, 1, def);
1389 if (ret) {
1390 dev_err(&imx274->client->dev,
1391 "Exposure ctrl range update failed\n");
1392 goto unlock;
1393 }
1394
1395 /* update exposure time accordingly */
1396 imx274_set_exposure(imx274, ctrl->val);
1397
1398 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n",
1399 fi->interval.numerator * 1000000
1400 / fi->interval.denominator);
1401 }
1402
1403 unlock:
1404 mutex_unlock(&imx274->lock);
1405 pm_runtime_put(&imx274->client->dev);
1406
1407 return ret;
1408 }
1409
1410 /**
1411 * imx274_load_default - load default control values
1412 * @priv: Pointer to device structure
1413 *
1414 * Return: 0 on success, errors otherwise
1415 */
imx274_load_default(struct stimx274 * priv)1416 static void imx274_load_default(struct stimx274 *priv)
1417 {
1418 /* load default control values */
1419 priv->frame_interval.numerator = 1;
1420 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
1421 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE;
1422 priv->ctrls.gain->val = IMX274_DEF_GAIN;
1423 priv->ctrls.vflip->val = 0;
1424 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED;
1425 }
1426
1427 /**
1428 * imx274_s_stream - It is used to start/stop the streaming.
1429 * @sd: V4L2 Sub device
1430 * @on: Flag (True / False)
1431 *
1432 * This function controls the start or stop of streaming for the
1433 * imx274 sensor.
1434 *
1435 * Return: 0 on success, errors otherwise
1436 */
imx274_s_stream(struct v4l2_subdev * sd,int on)1437 static int imx274_s_stream(struct v4l2_subdev *sd, int on)
1438 {
1439 struct stimx274 *imx274 = to_imx274(sd);
1440 int ret = 0;
1441
1442 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__,
1443 on ? "Stream Start" : "Stream Stop",
1444 imx274->mode - &imx274_modes[0]);
1445
1446 mutex_lock(&imx274->lock);
1447
1448 if (on) {
1449 ret = pm_runtime_resume_and_get(&imx274->client->dev);
1450 if (ret < 0) {
1451 mutex_unlock(&imx274->lock);
1452 return ret;
1453 }
1454
1455 /* load mode registers */
1456 ret = imx274_mode_regs(imx274);
1457 if (ret)
1458 goto fail;
1459
1460 ret = imx274_apply_trimming(imx274);
1461 if (ret)
1462 goto fail;
1463
1464 /*
1465 * update frame rate & expsoure. if the last mode is different,
1466 * HMAX could be changed. As the result, frame rate & exposure
1467 * are changed.
1468 * gain is not affected.
1469 */
1470 ret = imx274_set_frame_interval(imx274,
1471 imx274->frame_interval);
1472 if (ret)
1473 goto fail;
1474
1475 /* start stream */
1476 ret = imx274_start_stream(imx274);
1477 if (ret)
1478 goto fail;
1479 } else {
1480 /* stop stream */
1481 ret = imx274_write_table(imx274, imx274_stop);
1482 if (ret)
1483 goto fail;
1484
1485 pm_runtime_put(&imx274->client->dev);
1486 }
1487
1488 mutex_unlock(&imx274->lock);
1489 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__);
1490 return 0;
1491
1492 fail:
1493 pm_runtime_put(&imx274->client->dev);
1494 mutex_unlock(&imx274->lock);
1495 dev_err(&imx274->client->dev, "s_stream failed\n");
1496 return ret;
1497 }
1498
1499 /*
1500 * imx274_get_frame_length - Function for obtaining current frame length
1501 * @priv: Pointer to device structure
1502 * @val: Pointer to obainted value
1503 *
1504 * frame_length = vmax x (svr + 1), in unit of hmax.
1505 *
1506 * Return: 0 on success
1507 */
imx274_get_frame_length(struct stimx274 * priv,u32 * val)1508 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val)
1509 {
1510 int err;
1511 u32 svr;
1512 u32 vmax;
1513
1514 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);
1515 if (err)
1516 goto fail;
1517
1518 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3);
1519 if (err)
1520 goto fail;
1521
1522 *val = vmax * (svr + 1);
1523
1524 return 0;
1525
1526 fail:
1527 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1528 return err;
1529 }
1530
imx274_clamp_coarse_time(struct stimx274 * priv,u32 * val,u32 * frame_length)1531 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val,
1532 u32 *frame_length)
1533 {
1534 int err;
1535
1536 err = imx274_get_frame_length(priv, frame_length);
1537 if (err)
1538 return err;
1539
1540 if (*frame_length < priv->mode->min_frame_len)
1541 *frame_length = priv->mode->min_frame_len;
1542
1543 *val = *frame_length - *val; /* convert to raw shr */
1544 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST)
1545 *val = *frame_length - IMX274_SHR_LIMIT_CONST;
1546 else if (*val < priv->mode->min_SHR)
1547 *val = priv->mode->min_SHR;
1548
1549 return 0;
1550 }
1551
1552 /*
1553 * imx274_set_digital gain - Function called when setting digital gain
1554 * @priv: Pointer to device structure
1555 * @dgain: Value of digital gain.
1556 *
1557 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x
1558 *
1559 * Return: 0 on success
1560 */
imx274_set_digital_gain(struct stimx274 * priv,u32 dgain)1561 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain)
1562 {
1563 u8 reg_val;
1564
1565 reg_val = ffs(dgain);
1566
1567 if (reg_val)
1568 reg_val--;
1569
1570 reg_val = clamp(reg_val, (u8)0, (u8)3);
1571
1572 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG,
1573 reg_val & IMX274_MASK_LSB_4_BITS);
1574 }
1575
1576 /*
1577 * imx274_set_gain - Function called when setting gain
1578 * @priv: Pointer to device structure
1579 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT;
1580 * @ctrl: v4l2 control pointer
1581 *
1582 * Set the gain based on input value.
1583 * The caller should hold the mutex lock imx274->lock if necessary
1584 *
1585 * Return: 0 on success
1586 */
imx274_set_gain(struct stimx274 * priv,struct v4l2_ctrl * ctrl)1587 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl)
1588 {
1589 int err;
1590 u32 gain, analog_gain, digital_gain, gain_reg;
1591
1592 gain = (u32)(ctrl->val);
1593
1594 dev_dbg(&priv->client->dev,
1595 "%s : input gain = %d.%d\n", __func__,
1596 gain >> IMX274_GAIN_SHIFT,
1597 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT);
1598
1599 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN)
1600 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN;
1601 else if (gain < IMX274_MIN_GAIN)
1602 gain = IMX274_MIN_GAIN;
1603
1604 if (gain <= IMX274_MAX_ANALOG_GAIN)
1605 digital_gain = 1;
1606 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2)
1607 digital_gain = 2;
1608 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4)
1609 digital_gain = 4;
1610 else
1611 digital_gain = IMX274_MAX_DIGITAL_GAIN;
1612
1613 analog_gain = gain / digital_gain;
1614
1615 dev_dbg(&priv->client->dev,
1616 "%s : digital gain = %d, analog gain = %d.%d\n",
1617 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT,
1618 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100)
1619 >> IMX274_GAIN_SHIFT);
1620
1621 err = imx274_set_digital_gain(priv, digital_gain);
1622 if (err)
1623 goto fail;
1624
1625 /* convert to register value, refer to imx274 datasheet */
1626 gain_reg = (u32)IMX274_GAIN_CONST -
1627 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain;
1628 if (gain_reg > IMX274_GAIN_REG_MAX)
1629 gain_reg = IMX274_GAIN_REG_MAX;
1630
1631 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg,
1632 2);
1633 if (err)
1634 goto fail;
1635
1636 if (IMX274_GAIN_CONST - gain_reg == 0) {
1637 err = -EINVAL;
1638 goto fail;
1639 }
1640
1641 /* convert register value back to gain value */
1642 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT)
1643 / (IMX274_GAIN_CONST - gain_reg) * digital_gain;
1644
1645 dev_dbg(&priv->client->dev,
1646 "%s : GAIN control success, gain_reg = %d, new gain = %d\n",
1647 __func__, gain_reg, ctrl->val);
1648
1649 return 0;
1650
1651 fail:
1652 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1653 return err;
1654 }
1655
1656 /*
1657 * imx274_set_coarse_time - Function called when setting SHR value
1658 * @priv: Pointer to device structure
1659 * @val: Value for exposure time in number of line_length, or [HMAX]
1660 *
1661 * Set SHR value based on input value.
1662 *
1663 * Return: 0 on success
1664 */
imx274_set_coarse_time(struct stimx274 * priv,u32 * val)1665 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val)
1666 {
1667 int err;
1668 u32 coarse_time, frame_length;
1669
1670 coarse_time = *val;
1671
1672 /* convert exposure_time to appropriate SHR value */
1673 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length);
1674 if (err)
1675 goto fail;
1676
1677 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2);
1678 if (err)
1679 goto fail;
1680
1681 *val = frame_length - coarse_time;
1682 return 0;
1683
1684 fail:
1685 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1686 return err;
1687 }
1688
1689 /*
1690 * imx274_set_exposure - Function called when setting exposure time
1691 * @priv: Pointer to device structure
1692 * @val: Variable for exposure time, in the unit of micro-second
1693 *
1694 * Set exposure time based on input value.
1695 * The caller should hold the mutex lock imx274->lock if necessary
1696 *
1697 * Return: 0 on success
1698 */
imx274_set_exposure(struct stimx274 * priv,int val)1699 static int imx274_set_exposure(struct stimx274 *priv, int val)
1700 {
1701 int err;
1702 u32 hmax;
1703 u32 coarse_time; /* exposure time in unit of line (HMAX)*/
1704
1705 dev_dbg(&priv->client->dev,
1706 "%s : EXPOSURE control input = %d\n", __func__, val);
1707
1708 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */
1709
1710 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);
1711 if (err)
1712 goto fail;
1713
1714 if (hmax == 0) {
1715 err = -EINVAL;
1716 goto fail;
1717 }
1718
1719 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val
1720 - priv->mode->nocpiop) / hmax;
1721
1722 /* step 2: convert exposure_time into SHR value */
1723
1724 /* set SHR */
1725 err = imx274_set_coarse_time(priv, &coarse_time);
1726 if (err)
1727 goto fail;
1728
1729 priv->ctrls.exposure->val =
1730 (coarse_time * hmax + priv->mode->nocpiop)
1731 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2);
1732
1733 dev_dbg(&priv->client->dev,
1734 "%s : EXPOSURE control success\n", __func__);
1735 return 0;
1736
1737 fail:
1738 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1739
1740 return err;
1741 }
1742
1743 /*
1744 * imx274_set_vflip - Function called when setting vertical flip
1745 * @priv: Pointer to device structure
1746 * @val: Value for vflip setting
1747 *
1748 * Set vertical flip based on input value.
1749 * val = 0: normal, no vertical flip
1750 * val = 1: vertical flip enabled
1751 * The caller should hold the mutex lock imx274->lock if necessary
1752 *
1753 * Return: 0 on success
1754 */
imx274_set_vflip(struct stimx274 * priv,int val)1755 static int imx274_set_vflip(struct stimx274 *priv, int val)
1756 {
1757 int err;
1758
1759 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val);
1760 if (err) {
1761 dev_err(&priv->client->dev, "VFLIP control error\n");
1762 return err;
1763 }
1764
1765 dev_dbg(&priv->client->dev,
1766 "%s : VFLIP control success\n", __func__);
1767
1768 return 0;
1769 }
1770
1771 /*
1772 * imx274_set_test_pattern - Function called when setting test pattern
1773 * @priv: Pointer to device structure
1774 * @val: Variable for test pattern
1775 *
1776 * Set to different test patterns based on input value.
1777 *
1778 * Return: 0 on success
1779 */
imx274_set_test_pattern(struct stimx274 * priv,int val)1780 static int imx274_set_test_pattern(struct stimx274 *priv, int val)
1781 {
1782 int err = 0;
1783
1784 if (val == TEST_PATTERN_DISABLED) {
1785 err = imx274_write_table(priv, imx274_tp_disabled);
1786 } else if (val <= TEST_PATTERN_V_COLOR_BARS) {
1787 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1);
1788 if (!err)
1789 err = imx274_write_table(priv, imx274_tp_regs);
1790 } else {
1791 err = -EINVAL;
1792 }
1793
1794 if (!err)
1795 dev_dbg(&priv->client->dev,
1796 "%s : TEST PATTERN control success\n", __func__);
1797 else
1798 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1799
1800 return err;
1801 }
1802
1803 /*
1804 * imx274_set_frame_length - Function called when setting frame length
1805 * @priv: Pointer to device structure
1806 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length)
1807 *
1808 * Set frame length based on input value.
1809 *
1810 * Return: 0 on success
1811 */
imx274_set_frame_length(struct stimx274 * priv,u32 val)1812 static int imx274_set_frame_length(struct stimx274 *priv, u32 val)
1813 {
1814 int err;
1815 u32 frame_length;
1816
1817 dev_dbg(&priv->client->dev, "%s : input length = %d\n",
1818 __func__, val);
1819
1820 frame_length = (u32)val;
1821
1822 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3);
1823 if (err)
1824 goto fail;
1825
1826 return 0;
1827
1828 fail:
1829 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1830 return err;
1831 }
1832
1833 /*
1834 * imx274_set_frame_interval - Function called when setting frame interval
1835 * @priv: Pointer to device structure
1836 * @frame_interval: Variable for frame interval
1837 *
1838 * Change frame interval by updating VMAX value
1839 * The caller should hold the mutex lock imx274->lock if necessary
1840 *
1841 * Return: 0 on success
1842 */
imx274_set_frame_interval(struct stimx274 * priv,struct v4l2_fract frame_interval)1843 static int imx274_set_frame_interval(struct stimx274 *priv,
1844 struct v4l2_fract frame_interval)
1845 {
1846 int err;
1847 u32 frame_length, req_frame_rate;
1848 u32 svr;
1849 u32 hmax;
1850
1851 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d",
1852 __func__, frame_interval.numerator,
1853 frame_interval.denominator);
1854
1855 if (frame_interval.numerator == 0 || frame_interval.denominator == 0) {
1856 frame_interval.denominator = IMX274_DEF_FRAME_RATE;
1857 frame_interval.numerator = 1;
1858 }
1859
1860 req_frame_rate = (u32)(frame_interval.denominator
1861 / frame_interval.numerator);
1862
1863 /* boundary check */
1864 if (req_frame_rate > priv->mode->max_fps) {
1865 frame_interval.numerator = 1;
1866 frame_interval.denominator = priv->mode->max_fps;
1867 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) {
1868 frame_interval.numerator = 1;
1869 frame_interval.denominator = IMX274_MIN_FRAME_RATE;
1870 }
1871
1872 /*
1873 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX
1874 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX
1875 */
1876
1877 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2);
1878 if (err)
1879 goto fail;
1880
1881 dev_dbg(&priv->client->dev,
1882 "%s : register SVR = %d\n", __func__, svr);
1883
1884 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2);
1885 if (err)
1886 goto fail;
1887
1888 dev_dbg(&priv->client->dev,
1889 "%s : register HMAX = %d\n", __func__, hmax);
1890
1891 if (hmax == 0 || frame_interval.denominator == 0) {
1892 err = -EINVAL;
1893 goto fail;
1894 }
1895
1896 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax
1897 * frame_interval.numerator
1898 / frame_interval.denominator;
1899
1900 err = imx274_set_frame_length(priv, frame_length);
1901 if (err)
1902 goto fail;
1903
1904 priv->frame_interval = frame_interval;
1905 return 0;
1906
1907 fail:
1908 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1909 return err;
1910 }
1911
1912 static const struct v4l2_subdev_pad_ops imx274_pad_ops = {
1913 .get_fmt = imx274_get_fmt,
1914 .set_fmt = imx274_set_fmt,
1915 .get_selection = imx274_get_selection,
1916 .set_selection = imx274_set_selection,
1917 };
1918
1919 static const struct v4l2_subdev_video_ops imx274_video_ops = {
1920 .g_frame_interval = imx274_g_frame_interval,
1921 .s_frame_interval = imx274_s_frame_interval,
1922 .s_stream = imx274_s_stream,
1923 };
1924
1925 static const struct v4l2_subdev_ops imx274_subdev_ops = {
1926 .pad = &imx274_pad_ops,
1927 .video = &imx274_video_ops,
1928 };
1929
1930 static const struct v4l2_ctrl_ops imx274_ctrl_ops = {
1931 .s_ctrl = imx274_s_ctrl,
1932 };
1933
1934 static const struct of_device_id imx274_of_id_table[] = {
1935 { .compatible = "sony,imx274" },
1936 { }
1937 };
1938 MODULE_DEVICE_TABLE(of, imx274_of_id_table);
1939
1940 static const struct i2c_device_id imx274_id[] = {
1941 { "IMX274", 0 },
1942 { }
1943 };
1944 MODULE_DEVICE_TABLE(i2c, imx274_id);
1945
imx274_probe(struct i2c_client * client)1946 static int imx274_probe(struct i2c_client *client)
1947 {
1948 struct v4l2_subdev *sd;
1949 struct stimx274 *imx274;
1950 int ret;
1951
1952 /* initialize imx274 */
1953 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL);
1954 if (!imx274)
1955 return -ENOMEM;
1956
1957 mutex_init(&imx274->lock);
1958
1959 imx274->inck = devm_clk_get_optional(&client->dev, "inck");
1960 if (IS_ERR(imx274->inck))
1961 return PTR_ERR(imx274->inck);
1962
1963 ret = imx274_regulators_get(&client->dev, imx274);
1964 if (ret) {
1965 dev_err(&client->dev,
1966 "Failed to get power regulators, err: %d\n", ret);
1967 return ret;
1968 }
1969
1970 /* initialize format */
1971 imx274->mode = &imx274_modes[0];
1972 imx274->crop.width = IMX274_MAX_WIDTH;
1973 imx274->crop.height = IMX274_MAX_HEIGHT;
1974 imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio;
1975 imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio;
1976 imx274->format.field = V4L2_FIELD_NONE;
1977 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
1978 imx274->format.colorspace = V4L2_COLORSPACE_SRGB;
1979 imx274->frame_interval.numerator = 1;
1980 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
1981
1982 /* initialize regmap */
1983 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config);
1984 if (IS_ERR(imx274->regmap)) {
1985 dev_err(&client->dev,
1986 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap));
1987 ret = -ENODEV;
1988 goto err_regmap;
1989 }
1990
1991 /* initialize subdevice */
1992 imx274->client = client;
1993 sd = &imx274->sd;
1994 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops);
1995 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1996
1997 /* initialize subdev media pad */
1998 imx274->pad.flags = MEDIA_PAD_FL_SOURCE;
1999 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
2000 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad);
2001 if (ret < 0) {
2002 dev_err(&client->dev,
2003 "%s : media entity init Failed %d\n", __func__, ret);
2004 goto err_regmap;
2005 }
2006
2007 /* initialize sensor reset gpio */
2008 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
2009 GPIOD_OUT_HIGH);
2010 if (IS_ERR(imx274->reset_gpio)) {
2011 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER)
2012 dev_err(&client->dev, "Reset GPIO not setup in DT");
2013 ret = PTR_ERR(imx274->reset_gpio);
2014 goto err_me;
2015 }
2016
2017 /* power on the sensor */
2018 ret = imx274_power_on(&client->dev);
2019 if (ret < 0) {
2020 dev_err(&client->dev,
2021 "%s : imx274 power on failed\n", __func__);
2022 goto err_me;
2023 }
2024
2025 /* initialize controls */
2026 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4);
2027 if (ret < 0) {
2028 dev_err(&client->dev,
2029 "%s : ctrl handler init Failed\n", __func__);
2030 goto err_power_off;
2031 }
2032
2033 imx274->ctrls.handler.lock = &imx274->lock;
2034
2035 /* add new controls */
2036 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items(
2037 &imx274->ctrls.handler, &imx274_ctrl_ops,
2038 V4L2_CID_TEST_PATTERN,
2039 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu);
2040
2041 imx274->ctrls.gain = v4l2_ctrl_new_std(
2042 &imx274->ctrls.handler,
2043 &imx274_ctrl_ops,
2044 V4L2_CID_GAIN, IMX274_MIN_GAIN,
2045 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1,
2046 IMX274_DEF_GAIN);
2047
2048 imx274->ctrls.exposure = v4l2_ctrl_new_std(
2049 &imx274->ctrls.handler,
2050 &imx274_ctrl_ops,
2051 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME,
2052 1000000 / IMX274_DEF_FRAME_RATE, 1,
2053 IMX274_MIN_EXPOSURE_TIME);
2054
2055 imx274->ctrls.vflip = v4l2_ctrl_new_std(
2056 &imx274->ctrls.handler,
2057 &imx274_ctrl_ops,
2058 V4L2_CID_VFLIP, 0, 1, 1, 0);
2059
2060 imx274->sd.ctrl_handler = &imx274->ctrls.handler;
2061 if (imx274->ctrls.handler.error) {
2062 ret = imx274->ctrls.handler.error;
2063 goto err_ctrls;
2064 }
2065
2066 /* load default control values */
2067 imx274_load_default(imx274);
2068
2069 /* register subdevice */
2070 ret = v4l2_async_register_subdev(sd);
2071 if (ret < 0) {
2072 dev_err(&client->dev,
2073 "%s : v4l2_async_register_subdev failed %d\n",
2074 __func__, ret);
2075 goto err_ctrls;
2076 }
2077
2078 pm_runtime_set_active(&client->dev);
2079 pm_runtime_enable(&client->dev);
2080 pm_runtime_idle(&client->dev);
2081
2082 dev_info(&client->dev, "imx274 : imx274 probe success !\n");
2083 return 0;
2084
2085 err_ctrls:
2086 v4l2_ctrl_handler_free(&imx274->ctrls.handler);
2087 err_power_off:
2088 imx274_power_off(&client->dev);
2089 err_me:
2090 media_entity_cleanup(&sd->entity);
2091 err_regmap:
2092 mutex_destroy(&imx274->lock);
2093 return ret;
2094 }
2095
imx274_remove(struct i2c_client * client)2096 static int imx274_remove(struct i2c_client *client)
2097 {
2098 struct v4l2_subdev *sd = i2c_get_clientdata(client);
2099 struct stimx274 *imx274 = to_imx274(sd);
2100
2101 pm_runtime_disable(&client->dev);
2102 if (!pm_runtime_status_suspended(&client->dev))
2103 imx274_power_off(&client->dev);
2104 pm_runtime_set_suspended(&client->dev);
2105
2106 v4l2_async_unregister_subdev(sd);
2107 v4l2_ctrl_handler_free(&imx274->ctrls.handler);
2108
2109 media_entity_cleanup(&sd->entity);
2110 mutex_destroy(&imx274->lock);
2111 return 0;
2112 }
2113
2114 static const struct dev_pm_ops imx274_pm_ops = {
2115 SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL)
2116 };
2117
2118 static struct i2c_driver imx274_i2c_driver = {
2119 .driver = {
2120 .name = DRIVER_NAME,
2121 .pm = &imx274_pm_ops,
2122 .of_match_table = imx274_of_id_table,
2123 },
2124 .probe_new = imx274_probe,
2125 .remove = imx274_remove,
2126 .id_table = imx274_id,
2127 };
2128
2129 module_i2c_driver(imx274_i2c_driver);
2130
2131 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>");
2132 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver");
2133 MODULE_LICENSE("GPL v2");
2134