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Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-jammy-kernel.git] / drivers / media / i2c / imx274.c
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LL		 1/*
2 * imx274.c - IMX274 CMOS Image Sensor driver
3 *
4 * Copyright (C) 2017, Leopard Imaging, Inc.
5 *
6 * Leon Luo <leonl@leopardimaging.com>
7 * Edwin Zou <edwinz@leopardimaging.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms and conditions of the GNU General Public License,
11 * version 2, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include <linux/clk.h>
23#include <linux/delay.h>
24#include <linux/gpio.h>
25#include <linux/gpio/consumer.h>
26#include <linux/i2c.h>
27#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/of_gpio.h>
30#include <linux/regmap.h>
31#include <linux/slab.h>
32#include <linux/v4l2-mediabus.h>
33#include <linux/videodev2.h>
34
35#include <media/v4l2-ctrls.h>
36#include <media/v4l2-device.h>
37#include <media/v4l2-subdev.h>
38
39/*
40 * See "SHR, SVR Setting" in datasheet
41 */
42#define IMX274_DEFAULT_FRAME_LENGTH (4550)
43#define IMX274_MAX_FRAME_LENGTH (0x000fffff)
44
45/*
46 * See "Frame Rate Adjustment" in datasheet
47 */
48#define IMX274_PIXCLK_CONST1 (72000000)
49#define IMX274_PIXCLK_CONST2 (1000000)
50
51/*
52 * The input gain is shifted by IMX274_GAIN_SHIFT to get
53 * decimal number. The real gain is
54 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT)
55 */
56#define IMX274_GAIN_SHIFT (8)
57#define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1)
58
59/*
60 * See "Analog Gain" and "Digital Gain" in datasheet
61 * min gain is 1X
62 * max gain is calculated based on IMX274_GAIN_REG_MAX
63 */
64#define IMX274_GAIN_REG_MAX (1957)
65#define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT)
66#define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\
67 / (2048 - IMX274_GAIN_REG_MAX))
68#define IMX274_MAX_DIGITAL_GAIN (8)
69#define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT)
70#define IMX274_GAIN_CONST (2048) /* for gain formula */
71
72/*
73 * 1 line time in us = (HMAX / 72), minimal is 4 lines
74 */
75#define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72)
76
77#define IMX274_DEFAULT_MODE IMX274_MODE_3840X2160
78#define IMX274_MAX_WIDTH (3840)
79#define IMX274_MAX_HEIGHT (2160)
80#define IMX274_MAX_FRAME_RATE (120)
81#define IMX274_MIN_FRAME_RATE (5)
82#define IMX274_DEF_FRAME_RATE (60)
83
84/*
85 * register SHR is limited to (SVR value + 1) x VMAX value - 4
86 */
87#define IMX274_SHR_LIMIT_CONST (4)
88
89/*
90 * Constants for sensor reset delay
91 */
92#define IMX274_RESET_DELAY1 (2000)
93#define IMX274_RESET_DELAY2 (2200)
94
95/*
96 * shift and mask constants
97 */
98#define IMX274_SHIFT_8_BITS (8)
99#define IMX274_SHIFT_16_BITS (16)
100#define IMX274_MASK_LSB_2_BITS (0x03)
101#define IMX274_MASK_LSB_3_BITS (0x07)
102#define IMX274_MASK_LSB_4_BITS (0x0f)
103#define IMX274_MASK_LSB_8_BITS (0x00ff)
104
105#define DRIVER_NAME "IMX274"
106
107/*
108 * IMX274 register definitions
109 */
110#define IMX274_FRAME_LENGTH_ADDR_1 0x30FA /* VMAX, MSB */
111#define IMX274_FRAME_LENGTH_ADDR_2 0x30F9 /* VMAX */
112#define IMX274_FRAME_LENGTH_ADDR_3 0x30F8 /* VMAX, LSB */
113#define IMX274_SVR_REG_MSB 0x300F /* SVR */
114#define IMX274_SVR_REG_LSB 0x300E /* SVR */
115#define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */
116#define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */
117#define IMX274_COARSE_TIME_ADDR_MSB 0x300D /* SHR */
118#define IMX274_COARSE_TIME_ADDR_LSB 0x300C /* SHR */
119#define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */
120#define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */
121#define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */
122#define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */
123#define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */
124#define IMX274_STANDBY_REG 0x3000 /* STANDBY */
125
126#define IMX274_TABLE_WAIT_MS 0
127#define IMX274_TABLE_END 1
128
129/*
130 * imx274 I2C operation related structure
131 */
132struct reg_8 {
133 u16 addr;
134 u8 val;
135};
136
137static const struct regmap_config imx274_regmap_config = {
138 .reg_bits = 16,
139 .val_bits = 8,
140 .cache_type = REGCACHE_RBTREE,
141};
142
143enum imx274_mode {
144 IMX274_MODE_3840X2160,
145 IMX274_MODE_1920X1080,
146 IMX274_MODE_1280X720,
147
148 IMX274_MODE_START_STREAM_1,
149 IMX274_MODE_START_STREAM_2,
150 IMX274_MODE_START_STREAM_3,
151 IMX274_MODE_START_STREAM_4,
152 IMX274_MODE_STOP_STREAM
153};
154
155/*
156 * imx274 format related structure
157 */
158struct imx274_frmfmt {
159 u32 mbus_code;
160 enum v4l2_colorspace colorspace;
161 struct v4l2_frmsize_discrete size;
162 enum imx274_mode mode;
163};
164
165/*
166 * imx274 test pattern related structure
167 */
168enum {
169 TEST_PATTERN_DISABLED = 0,
170 TEST_PATTERN_ALL_000H,
171 TEST_PATTERN_ALL_FFFH,
172 TEST_PATTERN_ALL_555H,
173 TEST_PATTERN_ALL_AAAH,
174 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */
175 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */
176 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */
177 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */
178 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */
179 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */
180 TEST_PATTERN_H_COLOR_BARS,
181 TEST_PATTERN_V_COLOR_BARS,
182};
183
184static const char * const tp_qmenu[] = {
185 "Disabled",
186 "All 000h Pattern",
187 "All FFFh Pattern",
188 "All 555h Pattern",
189 "All AAAh Pattern",
190 "Vertical Stripe (555h / AAAh)",
191 "Vertical Stripe (AAAh / 555h)",
192 "Vertical Stripe (000h / 555h)",
193 "Vertical Stripe (555h / 000h)",
194 "Vertical Stripe (000h / FFFh)",
195 "Vertical Stripe (FFFh / 000h)",
196 "Horizontal Color Bars",
197 "Vertical Color Bars",
198};
199
200/*
201 * All-pixel scan mode (10-bit)
202 * imx274 mode1(refer to datasheet) register configuration with
203 * 3840x2160 resolution, raw10 data and mipi four lane output
204 */
205static const struct reg_8 imx274_mode1_3840x2160_raw10[] = {
206 {0x3004, 0x01},
207 {0x3005, 0x01},
208 {0x3006, 0x00},
209 {0x3007, 0x02},
210
211 {0x3018, 0xA2}, /* output XVS, HVS */
212
213 {0x306B, 0x05},
214 {0x30E2, 0x01},
215 {0x30F6, 0x07}, /* HMAX, 263 */
216 {0x30F7, 0x01}, /* HMAX */
217
218 {0x30dd, 0x01}, /* crop to 2160 */
219 {0x30de, 0x06},
220 {0x30df, 0x00},
221 {0x30e0, 0x12},
222 {0x30e1, 0x00},
223 {0x3037, 0x01}, /* to crop to 3840 */
224 {0x3038, 0x0c},
225 {0x3039, 0x00},
226 {0x303a, 0x0c},
227 {0x303b, 0x0f},
228
229 {0x30EE, 0x01},
230 {0x3130, 0x86},
231 {0x3131, 0x08},
232 {0x3132, 0x7E},
233 {0x3133, 0x08},
234 {0x3342, 0x0A},
235 {0x3343, 0x00},
236 {0x3344, 0x16},
237 {0x3345, 0x00},
238 {0x33A6, 0x01},
239 {0x3528, 0x0E},
240 {0x3554, 0x1F},
241 {0x3555, 0x01},
242 {0x3556, 0x01},
243 {0x3557, 0x01},
244 {0x3558, 0x01},
245 {0x3559, 0x00},
246 {0x355A, 0x00},
247 {0x35BA, 0x0E},
248 {0x366A, 0x1B},
249 {0x366B, 0x1A},
250 {0x366C, 0x19},
251 {0x366D, 0x17},
252 {0x3A41, 0x08},
253
254 {IMX274_TABLE_END, 0x00}
255};
256
257/*
258 * Horizontal/vertical 2/2-line binning
259 * (Horizontal and vertical weightedbinning, 10-bit)
260 * imx274 mode3(refer to datasheet) register configuration with
261 * 1920x1080 resolution, raw10 data and mipi four lane output
262 */
263static const struct reg_8 imx274_mode3_1920x1080_raw10[] = {
264 {0x3004, 0x02},
265 {0x3005, 0x21},
266 {0x3006, 0x00},
267 {0x3007, 0x11},
268
269 {0x3018, 0xA2}, /* output XVS, HVS */
270
271 {0x306B, 0x05},
272 {0x30E2, 0x02},
273
274 {0x30F6, 0x04}, /* HMAX, 260 */
275 {0x30F7, 0x01}, /* HMAX */
276
277 {0x30dd, 0x01}, /* to crop to 1920x1080 */
278 {0x30de, 0x05},
279 {0x30df, 0x00},
280 {0x30e0, 0x04},
281 {0x30e1, 0x00},
282 {0x3037, 0x01},
283 {0x3038, 0x0c},
284 {0x3039, 0x00},
285 {0x303a, 0x0c},
286 {0x303b, 0x0f},
287
288 {0x30EE, 0x01},
289 {0x3130, 0x4E},
290 {0x3131, 0x04},
291 {0x3132, 0x46},
292 {0x3133, 0x04},
293 {0x3342, 0x0A},
294 {0x3343, 0x00},
295 {0x3344, 0x1A},
296 {0x3345, 0x00},
297 {0x33A6, 0x01},
298 {0x3528, 0x0E},
299 {0x3554, 0x00},
300 {0x3555, 0x01},
301 {0x3556, 0x01},
302 {0x3557, 0x01},
303 {0x3558, 0x01},
304 {0x3559, 0x00},
305 {0x355A, 0x00},
306 {0x35BA, 0x0E},
307 {0x366A, 0x1B},
308 {0x366B, 0x1A},
309 {0x366C, 0x19},
310 {0x366D, 0x17},
311 {0x3A41, 0x08},
312
313 {IMX274_TABLE_END, 0x00}
314};
315
316/*
317 * Vertical 2/3 subsampling binning horizontal 3 binning
318 * imx274 mode5(refer to datasheet) register configuration with
319 * 1280x720 resolution, raw10 data and mipi four lane output
320 */
321static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
322 {0x3004, 0x03},
323 {0x3005, 0x31},
324 {0x3006, 0x00},
325 {0x3007, 0x09},
326
327 {0x3018, 0xA2}, /* output XVS, HVS */
328
329 {0x306B, 0x05},
330 {0x30E2, 0x03},
331
332 {0x30F6, 0x04}, /* HMAX, 260 */
333 {0x30F7, 0x01}, /* HMAX */
334
335 {0x30DD, 0x01},
336 {0x30DE, 0x07},
337 {0x30DF, 0x00},
338 {0x40E0, 0x04},
339 {0x30E1, 0x00},
340 {0x3030, 0xD4},
341 {0x3031, 0x02},
342 {0x3032, 0xD0},
343 {0x3033, 0x02},
344
345 {0x30EE, 0x01},
346 {0x3130, 0xE2},
347 {0x3131, 0x02},
348 {0x3132, 0xDE},
349 {0x3133, 0x02},
350 {0x3342, 0x0A},
351 {0x3343, 0x00},
352 {0x3344, 0x1B},
353 {0x3345, 0x00},
354 {0x33A6, 0x01},
355 {0x3528, 0x0E},
356 {0x3554, 0x00},
357 {0x3555, 0x01},
358 {0x3556, 0x01},
359 {0x3557, 0x01},
360 {0x3558, 0x01},
361 {0x3559, 0x00},
362 {0x355A, 0x00},
363 {0x35BA, 0x0E},
364 {0x366A, 0x1B},
365 {0x366B, 0x19},
366 {0x366C, 0x17},
367 {0x366D, 0x17},
368 {0x3A41, 0x04},
369
370 {IMX274_TABLE_END, 0x00}
371};
372
373/*
374 * imx274 first step register configuration for
375 * starting stream
376 */
377static const struct reg_8 imx274_start_1[] = {
378 {IMX274_STANDBY_REG, 0x12},
379 {IMX274_TABLE_END, 0x00}
380};
381
382/*
383 * imx274 second step register configuration for
384 * starting stream
385 */
386static const struct reg_8 imx274_start_2[] = {
387 {0x3120, 0xF0}, /* clock settings */
388 {0x3121, 0x00}, /* clock settings */
389 {0x3122, 0x02}, /* clock settings */
390 {0x3129, 0x9C}, /* clock settings */
391 {0x312A, 0x02}, /* clock settings */
392 {0x312D, 0x02}, /* clock settings */
393
394 {0x310B, 0x00},
395
396 /* PLSTMG */
397 {0x304C, 0x00}, /* PLSTMG01 */
398 {0x304D, 0x03},
399 {0x331C, 0x1A},
400 {0x331D, 0x00},
401 {0x3502, 0x02},
402 {0x3529, 0x0E},
403 {0x352A, 0x0E},
404 {0x352B, 0x0E},
405 {0x3538, 0x0E},
406 {0x3539, 0x0E},
407 {0x3553, 0x00},
408 {0x357D, 0x05},
409 {0x357F, 0x05},
410 {0x3581, 0x04},
411 {0x3583, 0x76},
412 {0x3587, 0x01},
413 {0x35BB, 0x0E},
414 {0x35BC, 0x0E},
415 {0x35BD, 0x0E},
416 {0x35BE, 0x0E},
417 {0x35BF, 0x0E},
418 {0x366E, 0x00},
419 {0x366F, 0x00},
420 {0x3670, 0x00},
421 {0x3671, 0x00},
422
423 /* PSMIPI */
424 {0x3304, 0x32}, /* PSMIPI1 */
425 {0x3305, 0x00},
426 {0x3306, 0x32},
427 {0x3307, 0x00},
428 {0x3590, 0x32},
429 {0x3591, 0x00},
430 {0x3686, 0x32},
431 {0x3687, 0x00},
432
433 {IMX274_TABLE_END, 0x00}
434};
435
436/*
437 * imx274 third step register configuration for
438 * starting stream
439 */
440static const struct reg_8 imx274_start_3[] = {
441 {IMX274_STANDBY_REG, 0x00},
442 {0x303E, 0x02}, /* SYS_MODE = 2 */
443 {IMX274_TABLE_END, 0x00}
444};
445
446/*
447 * imx274 forth step register configuration for
448 * starting stream
449 */
450static const struct reg_8 imx274_start_4[] = {
451 {0x30F4, 0x00},
452 {0x3018, 0xA2}, /* XHS VHS OUTUPT */
453 {IMX274_TABLE_END, 0x00}
454};
455
456/*
457 * imx274 register configuration for stoping stream
458 */
459static const struct reg_8 imx274_stop[] = {
460 {IMX274_STANDBY_REG, 0x01},
461 {IMX274_TABLE_END, 0x00}
462};
463
464/*
465 * imx274 disable test pattern register configuration
466 */
467static const struct reg_8 imx274_tp_disabled[] = {
468 {0x303C, 0x00},
469 {0x377F, 0x00},
470 {0x3781, 0x00},
471 {0x370B, 0x00},
472 {IMX274_TABLE_END, 0x00}
473};
474
475/*
476 * imx274 test pattern register configuration
477 * reg 0x303D defines the test pattern modes
478 */
479static const struct reg_8 imx274_tp_regs[] = {
480 {0x303C, 0x11},
481 {0x370E, 0x01},
482 {0x377F, 0x01},
483 {0x3781, 0x01},
484 {0x370B, 0x11},
485 {IMX274_TABLE_END, 0x00}
486};
487
488static const struct reg_8 *mode_table[] = {
489 [IMX274_MODE_3840X2160] = imx274_mode1_3840x2160_raw10,
490 [IMX274_MODE_1920X1080] = imx274_mode3_1920x1080_raw10,
491 [IMX274_MODE_1280X720] = imx274_mode5_1280x720_raw10,
492
493 [IMX274_MODE_START_STREAM_1] = imx274_start_1,
494 [IMX274_MODE_START_STREAM_2] = imx274_start_2,
495 [IMX274_MODE_START_STREAM_3] = imx274_start_3,
496 [IMX274_MODE_START_STREAM_4] = imx274_start_4,
497 [IMX274_MODE_STOP_STREAM] = imx274_stop,
498};
499
500/*
501 * imx274 format related structure
502 */
503static const struct imx274_frmfmt imx274_formats[] = {
504 {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {3840, 2160},
505 IMX274_MODE_3840X2160},
506 {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1920, 1080},
507 IMX274_MODE_1920X1080},
508 {MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_COLORSPACE_SRGB, {1280, 720},
509 IMX274_MODE_1280X720},
510};
511
512/*
513 * minimal frame length for each mode
514 * refer to datasheet section "Frame Rate Adjustment (CSI-2)"
515 */
516static const int min_frame_len[] = {
517 4550, /* mode 1, 4K */
518 2310, /* mode 3, 1080p */
519 2310 /* mode 5, 720p */
520};
521
522/*
523 * minimal numbers of SHR register
524 * refer to datasheet table "Shutter Setting (CSI-2)"
525 */
526static const int min_SHR[] = {
527 12, /* mode 1, 4K */
528 8, /* mode 3, 1080p */
529 8 /* mode 5, 720p */
530};
531
532static const int max_frame_rate[] = {
533 60, /* mode 1 , 4K */
534 120, /* mode 3, 1080p */
535 120 /* mode 5, 720p */
536};
537
538/*
539 * Number of clocks per internal offset period
540 * a constant based on mode
541 * refer to section "Integration Time in Each Readout Drive Mode (CSI-2)"
542 * in the datasheet
543 * for the implemented 3 modes, it happens to be the same number
544 */
545static const int nocpiop[] = {
546 112, /* mode 1 , 4K */
547 112, /* mode 3, 1080p */
548 112 /* mode 5, 720p */
549};
550
551/*
552 * struct imx274_ctrls - imx274 ctrl structure
553 * @handler: V4L2 ctrl handler structure
554 * @exposure: Pointer to expsure ctrl structure
555 * @gain: Pointer to gain ctrl structure
556 * @vflip: Pointer to vflip ctrl structure
557 * @test_pattern: Pointer to test pattern ctrl structure
558 */
559struct imx274_ctrls {
560 struct v4l2_ctrl_handler handler;
561 struct v4l2_ctrl *exposure;
562 struct v4l2_ctrl *gain;
563 struct v4l2_ctrl *vflip;
564 struct v4l2_ctrl *test_pattern;
565};
566
567/*
568 * struct stim274 - imx274 device structure
569 * @sd: V4L2 subdevice structure
570 * @pd: Media pad structure
571 * @client: Pointer to I2C client
572 * @ctrls: imx274 control structure
573 * @format: V4L2 media bus frame format structure
574 * @frame_rate: V4L2 frame rate structure
575 * @regmap: Pointer to regmap structure
576 * @reset_gpio: Pointer to reset gpio
577 * @lock: Mutex structure
578 * @mode_index: Resolution mode index
579 */
580struct stimx274 {
581 struct v4l2_subdev sd;
582 struct media_pad pad;
583 struct i2c_client *client;
584 struct imx274_ctrls ctrls;
585 struct v4l2_mbus_framefmt format;
586 struct v4l2_fract frame_interval;
587 struct regmap *regmap;
588 struct gpio_desc *reset_gpio;
589 struct mutex lock; /* mutex lock for operations */
590 u32 mode_index;
591};
592
593/*
594 * Function declaration
595 */
596static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl);
597static int imx274_set_exposure(struct stimx274 *priv, int val);
598static int imx274_set_vflip(struct stimx274 *priv, int val);
599static int imx274_set_test_pattern(struct stimx274 *priv, int val);
600static int imx274_set_frame_interval(struct stimx274 *priv,
601 struct v4l2_fract frame_interval);
602
603static inline void msleep_range(unsigned int delay_base)
604{
605 usleep_range(delay_base * 1000, delay_base * 1000 + 500);
606}
607
608/*
609 * v4l2_ctrl and v4l2_subdev related operations
610 */
611static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
612{
613 return &container_of(ctrl->handler,
614 struct stimx274, ctrls.handler)->sd;
615}
616
617static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd)
618{
619 return container_of(sd, struct stimx274, sd);
620}
621
622/*
623 * imx274_regmap_util_write_table_8 - Function for writing register table
624 * @regmap: Pointer to device reg map structure
625 * @table: Table containing register values
626 * @wait_ms_addr: Flag for performing delay
627 * @end_addr: Flag for incating end of table
628 *
629 * This is used to write register table into sensor's reg map.
630 *
631 * Return: 0 on success, errors otherwise
632 */
633static int imx274_regmap_util_write_table_8(struct regmap *regmap,
634 const struct reg_8 table[],
635 u16 wait_ms_addr, u16 end_addr)
636{
637 int err;
638 const struct reg_8 *next;
639 u8 val;
640
641 int range_start = -1;
642 int range_count = 0;
643 u8 range_vals[16];
644 int max_range_vals = ARRAY_SIZE(range_vals);
645
646 for (next = table;; next++) {
647 if ((next->addr != range_start + range_count) ||
648 (next->addr == end_addr) ||
649 (next->addr == wait_ms_addr) ||
650 (range_count == max_range_vals)) {
651 if (range_count == 1)
652 err = regmap_write(regmap,
653 range_start, range_vals[0]);
654 else if (range_count > 1)
655 err = regmap_bulk_write(regmap, range_start,
656 &range_vals[0],
657 range_count);
658
659 if (err)
660 return err;
661
662 range_start = -1;
663 range_count = 0;
664
665 /* Handle special address values */
666 if (next->addr == end_addr)
667 break;
668
669 if (next->addr == wait_ms_addr) {
670 msleep_range(next->val);
671 continue;
672 }
673 }
674
675 val = next->val;
676
677 if (range_start == -1)
678 range_start = next->addr;
679
680 range_vals[range_count++] = val;
681 }
682 return 0;
683}
684
685static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val)
686{
687 int err;
688
689 err = regmap_read(priv->regmap, addr, (unsigned int *)val);
690 if (err)
691 dev_err(&priv->client->dev,
692 "%s : i2c read failed, addr = %x\n", __func__, addr);
693 else
694 dev_dbg(&priv->client->dev,
695 "%s : addr 0x%x, val=0x%x\n", __func__,
696 addr, *val);
697 return err;
698}
699
700static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val)
701{
702 int err;
703
704 err = regmap_write(priv->regmap, addr, val);
705 if (err)
706 dev_err(&priv->client->dev,
707 "%s : i2c write failed, %x = %x\n", __func__,
708 addr, val);
709 else
710 dev_dbg(&priv->client->dev,
711 "%s : addr 0x%x, val=0x%x\n", __func__,
712 addr, val);
713 return err;
714}
715
716static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[])
717{
718 return imx274_regmap_util_write_table_8(priv->regmap,
719 table, IMX274_TABLE_WAIT_MS, IMX274_TABLE_END);
720}
721
722/*
723 * imx274_mode_regs - Function for set mode registers per mode index
724 * @priv: Pointer to device structure
725 * @mode: Mode index value
726 *
727 * This is used to start steam per mode index.
728 * mode = 0, start stream for sensor Mode 1: 4K/raw10
729 * mode = 1, start stream for sensor Mode 3: 1080p/raw10
730 * mode = 2, start stream for sensor Mode 5: 720p/raw10
731 *
732 * Return: 0 on success, errors otherwise
733 */
734static int imx274_mode_regs(struct stimx274 *priv, int mode)
735{
736 int err = 0;
737
738 err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_1]);
739 if (err)
740 return err;
741
742 err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_2]);
743 if (err)
744 return err;
745
746 err = imx274_write_table(priv, mode_table[mode]);
747
748 return err;
749}
750
751/*
752 * imx274_start_stream - Function for starting stream per mode index
753 * @priv: Pointer to device structure
754 *
755 * Return: 0 on success, errors otherwise
756 */
757static int imx274_start_stream(struct stimx274 *priv)
758{
759 int err = 0;
760
761 /*
762 * Refer to "Standby Cancel Sequence when using CSI-2" in
763 * imx274 datasheet, it should wait 10ms or more here.
764 * give it 1 extra ms for margin
765 */
766 msleep_range(11);
767 err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_3]);
768 if (err)
769 return err;
770
771 /*
772 * Refer to "Standby Cancel Sequence when using CSI-2" in
773 * imx274 datasheet, it should wait 7ms or more here.
774 * give it 1 extra ms for margin
775 */
776 msleep_range(8);
777 err = imx274_write_table(priv, mode_table[IMX274_MODE_START_STREAM_4]);
778 if (err)
779 return err;
780
781 return 0;
782}
783
784/*
785 * imx274_reset - Function called to reset the sensor
786 * @priv: Pointer to device structure
787 * @rst: Input value for determining the sensor's end state after reset
788 *
789 * Set the senor in reset and then
790 * if rst = 0, keep it in reset;
791 * if rst = 1, bring it out of reset.
792 *
793 */
794static void imx274_reset(struct stimx274 *priv, int rst)
795{
796 gpiod_set_value_cansleep(priv->reset_gpio, 0);
797 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
798 gpiod_set_value_cansleep(priv->reset_gpio, !!rst);
799 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2);
800}
801
802/**
803 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls
804 * @ctrl: V4L2 control to be set
805 *
806 * This function is used to set the V4L2 controls for the imx274 sensor.
807 *
808 * Return: 0 on success, errors otherwise
809 */
810static int imx274_s_ctrl(struct v4l2_ctrl *ctrl)
811{
812 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
813 struct stimx274 *imx274 = to_imx274(sd);
814 int ret = -EINVAL;
815
816 dev_dbg(&imx274->client->dev,
817 "%s : s_ctrl: %s, value: %d\n", __func__,
818 ctrl->name, ctrl->val);
819
820 switch (ctrl->id) {
821 case V4L2_CID_EXPOSURE:
822 dev_dbg(&imx274->client->dev,
823 "%s : set V4L2_CID_EXPOSURE\n", __func__);
824 ret = imx274_set_exposure(imx274, ctrl->val);
825 break;
826
827 case V4L2_CID_GAIN:
828 dev_dbg(&imx274->client->dev,
829 "%s : set V4L2_CID_GAIN\n", __func__);
830 ret = imx274_set_gain(imx274, ctrl);
831 break;
832
833 case V4L2_CID_VFLIP:
834 dev_dbg(&imx274->client->dev,
835 "%s : set V4L2_CID_VFLIP\n", __func__);
836 ret = imx274_set_vflip(imx274, ctrl->val);
837 break;
838
839 case V4L2_CID_TEST_PATTERN:
840 dev_dbg(&imx274->client->dev,
841 "%s : set V4L2_CID_TEST_PATTERN\n", __func__);
842 ret = imx274_set_test_pattern(imx274, ctrl->val);
843 break;
844 }
845
846 return ret;
847}
848
849/**
850 * imx274_get_fmt - Get the pad format
851 * @sd: Pointer to V4L2 Sub device structure
852 * @cfg: Pointer to sub device pad information structure
853 * @fmt: Pointer to pad level media bus format
854 *
855 * This function is used to get the pad format information.
856 *
857 * Return: 0 on success
858 */
859static int imx274_get_fmt(struct v4l2_subdev *sd,
860 struct v4l2_subdev_pad_config *cfg,
861 struct v4l2_subdev_format *fmt)
862{
863 struct stimx274 *imx274 = to_imx274(sd);
864
865 mutex_lock(&imx274->lock);
866 fmt->format = imx274->format;
867 mutex_unlock(&imx274->lock);
868 return 0;
869}
870
871/**
872 * imx274_set_fmt - This is used to set the pad format
873 * @sd: Pointer to V4L2 Sub device structure
874 * @cfg: Pointer to sub device pad information structure
875 * @format: Pointer to pad level media bus format
876 *
877 * This function is used to set the pad format.
878 *
879 * Return: 0 on success
880 */
881static int imx274_set_fmt(struct v4l2_subdev *sd,
882 struct v4l2_subdev_pad_config *cfg,
883 struct v4l2_subdev_format *format)
884{
885 struct v4l2_mbus_framefmt *fmt = &format->format;
886 struct stimx274 *imx274 = to_imx274(sd);
887 struct i2c_client *client = imx274->client;
888 int index;
889
890 dev_dbg(&client->dev,
891 "%s: width = %d height = %d code = %d mbus_code = %d\n",
892 __func__, fmt->width, fmt->height, fmt->code,
893 imx274_formats[imx274->mode_index].mbus_code);
894
895 mutex_lock(&imx274->lock);
896
897 for (index = 0; index < ARRAY_SIZE(imx274_formats); index++) {
898 if (imx274_formats[index].size.width == fmt->width &&
899 imx274_formats[index].size.height == fmt->height)
900 break;
901 }
902
903 if (index >= ARRAY_SIZE(imx274_formats)) {
904 /* default to first format */
905 index = 0;
906 }
907
908 imx274->mode_index = index;
909
910 if (fmt->width > IMX274_MAX_WIDTH)
911 fmt->width = IMX274_MAX_WIDTH;
912 if (fmt->height > IMX274_MAX_HEIGHT)
913 fmt->height = IMX274_MAX_HEIGHT;
914 fmt->width = fmt->width & (~IMX274_MASK_LSB_2_BITS);
915 fmt->height = fmt->height & (~IMX274_MASK_LSB_2_BITS);
916 fmt->field = V4L2_FIELD_NONE;
917
918 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
919 cfg->try_fmt = *fmt;
920 else
921 imx274->format = *fmt;
922
923 mutex_unlock(&imx274->lock);
924 return 0;
925}
926
927/**
928 * imx274_g_frame_interval - Get the frame interval
929 * @sd: Pointer to V4L2 Sub device structure
930 * @fi: Pointer to V4l2 Sub device frame interval structure
931 *
932 * This function is used to get the frame interval.
933 *
934 * Return: 0 on success
935 */
936static int imx274_g_frame_interval(struct v4l2_subdev *sd,
937 struct v4l2_subdev_frame_interval *fi)
938{
939 struct stimx274 *imx274 = to_imx274(sd);
940
941 fi->interval = imx274->frame_interval;
942 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n",
943 __func__, imx274->frame_interval.numerator,
944 imx274->frame_interval.denominator);
945
946 return 0;
947}
948
949/**
950 * imx274_s_frame_interval - Set the frame interval
951 * @sd: Pointer to V4L2 Sub device structure
952 * @fi: Pointer to V4l2 Sub device frame interval structure
953 *
954 * This function is used to set the frame intervavl.
955 *
956 * Return: 0 on success
957 */
958static int imx274_s_frame_interval(struct v4l2_subdev *sd,
959 struct v4l2_subdev_frame_interval *fi)
960{
961 struct stimx274 *imx274 = to_imx274(sd);
962 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure;
963 int min, max, def;
964 int ret;
965
966 mutex_lock(&imx274->lock);
967 ret = imx274_set_frame_interval(imx274, fi->interval);
968
969 if (!ret) {
970 /*
971 * exposure time range is decided by frame interval
972 * need to update it after frame interal changes
973 */
974 min = IMX274_MIN_EXPOSURE_TIME;
975 max = fi->interval.numerator * 1000000
976 / fi->interval.denominator;
977 def = max;
978 if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) {
979 dev_err(&imx274->client->dev,
980 "Exposure ctrl range update failed\n");
981 goto unlock;
982 }
983
984 /* update exposure time accordingly */
985 imx274_set_exposure(imx274, imx274->ctrls.exposure->val);
986
987 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n",
988 fi->interval.numerator * 1000000
989 / fi->interval.denominator);
990 }
991
992unlock:
993 mutex_unlock(&imx274->lock);
994
995 return ret;
996}
997
998/**
999 * imx274_load_default - load default control values
1000 * @priv: Pointer to device structure
1001 *
1002 * Return: 0 on success, errors otherwise
1003 */
1004static int imx274_load_default(struct stimx274 *priv)
1005{
1006 int ret;
1007
1008 /* load default control values */
1009 priv->frame_interval.numerator = 1;
1010 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
1011 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE;
1012 priv->ctrls.gain->val = IMX274_DEF_GAIN;
1013 priv->ctrls.vflip->val = 0;
1014 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED;
1015
1016 /* update frame rate */
1017 ret = imx274_set_frame_interval(priv,
1018 priv->frame_interval);
1019 if (ret)
1020 return ret;
1021
1022 /* update exposure time */
1023 ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val);
1024 if (ret)
1025 return ret;
1026
1027 /* update gain */
1028 ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val);
1029 if (ret)
1030 return ret;
1031
1032 /* update vflip */
1033 ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val);
1034 if (ret)
1035 return ret;
1036
1037 return 0;
1038}
1039
1040/**
1041 * imx274_s_stream - It is used to start/stop the streaming.
1042 * @sd: V4L2 Sub device
1043 * @on: Flag (True / False)
1044 *
1045 * This function controls the start or stop of streaming for the
1046 * imx274 sensor.
1047 *
1048 * Return: 0 on success, errors otherwise
1049 */
1050static int imx274_s_stream(struct v4l2_subdev *sd, int on)
1051{
1052 struct stimx274 *imx274 = to_imx274(sd);
1053 int ret = 0;
1054
1055 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %d\n", __func__,
1056 on ? "Stream Start" : "Stream Stop", imx274->mode_index);
1057
1058 mutex_lock(&imx274->lock);
1059
1060 if (on) {
1061 /* load mode registers */
2b00e30f 1062 ret = imx274_mode_regs(imx274, imx274->mode_index);
0985dd30
LL		 1063 if (ret)
1064 goto fail;
1065
1066 /*
1067 * update frame rate & expsoure. if the last mode is different,
1068 * HMAX could be changed. As the result, frame rate & exposure
1069 * are changed.
1070 * gain is not affected.
1071 */
1072 ret = imx274_set_frame_interval(imx274,
1073 imx274->frame_interval);
1074 if (ret)
1075 goto fail;
1076
1077 /* update exposure time */
1078 ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure,
1079 imx274->ctrls.exposure->val);
1080 if (ret)
1081 goto fail;
1082
1083 /* start stream */
1084 ret = imx274_start_stream(imx274);
1085 if (ret)
1086 goto fail;
1087 } else {
1088 /* stop stream */
1089 ret = imx274_write_table(imx274,
1090 mode_table[IMX274_MODE_STOP_STREAM]);
1091 if (ret)
1092 goto fail;
1093 }
1094
1095 mutex_unlock(&imx274->lock);
1096 dev_dbg(&imx274->client->dev,
1097 "%s : Done: mode = %d\n", __func__, imx274->mode_index);
1098 return 0;
1099
1100fail:
1101 mutex_unlock(&imx274->lock);
1102 dev_err(&imx274->client->dev, "s_stream failed\n");
1103 return ret;
1104}
1105
1106/*
1107 * imx274_get_frame_length - Function for obtaining current frame length
1108 * @priv: Pointer to device structure
1109 * @val: Pointer to obainted value
1110 *
1111 * frame_length = vmax x (svr + 1), in unit of hmax.
1112 *
1113 * Return: 0 on success
1114 */
1115static int imx274_get_frame_length(struct stimx274 *priv, u32 *val)
1116{
1117 int err;
1118 u16 svr;
1119 u32 vmax;
1120 u8 reg_val[3];
1121
1122 /* svr */
1123 err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, &reg_val[0]);
1124 if (err)
1125 goto fail;
1126
1127 err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, &reg_val[1]);
1128 if (err)
1129 goto fail;
1130
1131 svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
1132
1133 /* vmax */
1134 err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_3, &reg_val[0]);
1135 if (err)
1136 goto fail;
1137
1138 err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_2, &reg_val[1]);
1139 if (err)
1140 goto fail;
1141
1142 err = imx274_read_reg(priv, IMX274_FRAME_LENGTH_ADDR_1, &reg_val[2]);
1143 if (err)
1144 goto fail;
1145
1146 vmax = ((reg_val[2] & IMX274_MASK_LSB_3_BITS) << IMX274_SHIFT_16_BITS)
1147 + (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
1148
1149 *val = vmax * (svr + 1);
1150
1151 return 0;
1152
1153fail:
1154 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1155 return err;
1156}
1157
1158static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val,
1159 u32 *frame_length)
1160{
1161 int err;
1162
1163 err = imx274_get_frame_length(priv, frame_length);
1164 if (err)
1165 return err;
1166
1167 if (*frame_length < min_frame_len[priv->mode_index])
1168 *frame_length = min_frame_len[priv->mode_index];
1169
1170 *val = *frame_length - *val; /* convert to raw shr */
1171 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST)
1172 *val = *frame_length - IMX274_SHR_LIMIT_CONST;
1173 else if (*val < min_SHR[priv->mode_index])
1174 *val = min_SHR[priv->mode_index];
1175
1176 return 0;
1177}
1178
1179/*
1180 * imx274_set_digital gain - Function called when setting digital gain
1181 * @priv: Pointer to device structure
1182 * @dgain: Value of digital gain.
1183 *
1184 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x
1185 *
1186 * Return: 0 on success
1187 */
1188static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain)
1189{
1190 u8 reg_val;
1191
1192 reg_val = ffs(dgain);
1193
1194 if (reg_val)
1195 reg_val--;
1196
1197 reg_val = clamp(reg_val, (u8)0, (u8)3);
1198
1199 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG,
1200 reg_val & IMX274_MASK_LSB_4_BITS);
1201}
1202
1203static inline void imx274_calculate_gain_regs(struct reg_8 regs[2], u16 gain)
1204{
1205 regs->addr = IMX274_ANALOG_GAIN_ADDR_MSB;
1206 regs->val = (gain >> IMX274_SHIFT_8_BITS) & IMX274_MASK_LSB_3_BITS;
1207
1208 (regs + 1)->addr = IMX274_ANALOG_GAIN_ADDR_LSB;
1209 (regs + 1)->val = (gain) & IMX274_MASK_LSB_8_BITS;
1210}
1211
1212/*
1213 * imx274_set_gain - Function called when setting gain
1214 * @priv: Pointer to device structure
1215 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT;
1216 * @ctrl: v4l2 control pointer
1217 *
1218 * Set the gain based on input value.
1219 * The caller should hold the mutex lock imx274->lock if necessary
1220 *
1221 * Return: 0 on success
1222 */
1223static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl)
1224{
1225 struct reg_8 reg_list[2];
1226 int err;
1227 u32 gain, analog_gain, digital_gain, gain_reg;
1228 int i;
1229
1230 gain = (u32)(ctrl->val);
1231
1232 dev_dbg(&priv->client->dev,
1233 "%s : input gain = %d.%d\n", __func__,
1234 gain >> IMX274_GAIN_SHIFT,
1235 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT);
1236
1237 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN)
1238 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN;
1239 else if (gain < IMX274_MIN_GAIN)
1240 gain = IMX274_MIN_GAIN;
1241
1242 if (gain <= IMX274_MAX_ANALOG_GAIN)
1243 digital_gain = 1;
1244 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2)
1245 digital_gain = 2;
1246 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4)
1247 digital_gain = 4;
1248 else
1249 digital_gain = IMX274_MAX_DIGITAL_GAIN;
1250
1251 analog_gain = gain / digital_gain;
1252
1253 dev_dbg(&priv->client->dev,
1254 "%s : digital gain = %d, analog gain = %d.%d\n",
1255 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT,
1256 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100)
1257 >> IMX274_GAIN_SHIFT);
1258
1259 err = imx274_set_digital_gain(priv, digital_gain);
1260 if (err)
1261 goto fail;
1262
1263 /* convert to register value, refer to imx274 datasheet */
1264 gain_reg = (u32)IMX274_GAIN_CONST -
1265 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain;
1266 if (gain_reg > IMX274_GAIN_REG_MAX)
1267 gain_reg = IMX274_GAIN_REG_MAX;
1268
1269 imx274_calculate_gain_regs(reg_list, (u16)gain_reg);
1270
1271 for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
1272 err = imx274_write_reg(priv, reg_list[i].addr,
1273 reg_list[i].val);
1274 if (err)
1275 goto fail;
1276 }
1277
1278 if (IMX274_GAIN_CONST - gain_reg == 0) {
1279 err = -EINVAL;
1280 goto fail;
1281 }
1282
1283 /* convert register value back to gain value */
1284 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT)
1285 / (IMX274_GAIN_CONST - gain_reg) * digital_gain;
1286
1287 dev_dbg(&priv->client->dev,
1288 "%s : GAIN control success, gain_reg = %d, new gain = %d\n",
1289 __func__, gain_reg, ctrl->val);
1290
1291 return 0;
1292
1293fail:
1294 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1295 return err;
1296}
1297
1298static inline void imx274_calculate_coarse_time_regs(struct reg_8 regs[2],
1299 u32 coarse_time)
1300{
1301 regs->addr = IMX274_COARSE_TIME_ADDR_MSB;
1302 regs->val = (coarse_time >> IMX274_SHIFT_8_BITS)
1303 & IMX274_MASK_LSB_8_BITS;
1304 (regs + 1)->addr = IMX274_COARSE_TIME_ADDR_LSB;
1305 (regs + 1)->val = (coarse_time) & IMX274_MASK_LSB_8_BITS;
1306}
1307
1308/*
1309 * imx274_set_coarse_time - Function called when setting SHR value
1310 * @priv: Pointer to device structure
1311 * @val: Value for exposure time in number of line_length, or [HMAX]
1312 *
1313 * Set SHR value based on input value.
1314 *
1315 * Return: 0 on success
1316 */
1317static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val)
1318{
1319 struct reg_8 reg_list[2];
1320 int err;
1321 u32 coarse_time, frame_length;
1322 int i;
1323
1324 coarse_time = *val;
1325
1326 /* convert exposure_time to appropriate SHR value */
1327 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length);
1328 if (err)
1329 goto fail;
1330
1331 /* prepare SHR registers */
1332 imx274_calculate_coarse_time_regs(reg_list, coarse_time);
1333
1334 /* write to SHR registers */
1335 for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
1336 err = imx274_write_reg(priv, reg_list[i].addr,
1337 reg_list[i].val);
1338 if (err)
1339 goto fail;
1340 }
1341
1342 *val = frame_length - coarse_time;
1343 return 0;
1344
1345fail:
1346 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1347 return err;
1348}
1349
1350/*
1351 * imx274_set_exposure - Function called when setting exposure time
1352 * @priv: Pointer to device structure
1353 * @val: Variable for exposure time, in the unit of micro-second
1354 *
1355 * Set exposure time based on input value.
1356 * The caller should hold the mutex lock imx274->lock if necessary
1357 *
1358 * Return: 0 on success
1359 */
1360static int imx274_set_exposure(struct stimx274 *priv, int val)
1361{
1362 int err;
1363 u16 hmax;
1364 u8 reg_val[2];
1365 u32 coarse_time; /* exposure time in unit of line (HMAX)*/
1366
1367 dev_dbg(&priv->client->dev,
1368 "%s : EXPOSURE control input = %d\n", __func__, val);
1369
1370 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */
1371
1372 /* obtain HMAX value */
1373 err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, &reg_val[0]);
1374 if (err)
1375 goto fail;
1376 err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, &reg_val[1]);
1377 if (err)
1378 goto fail;
1379 hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
1380 if (hmax == 0) {
1381 err = -EINVAL;
1382 goto fail;
1383 }
1384
1385 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val
1386 - nocpiop[priv->mode_index]) / hmax;
1387
1388 /* step 2: convert exposure_time into SHR value */
1389
1390 /* set SHR */
1391 err = imx274_set_coarse_time(priv, &coarse_time);
1392 if (err)
1393 goto fail;
1394
1395 priv->ctrls.exposure->val =
1396 (coarse_time * hmax + nocpiop[priv->mode_index])
1397 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2);
1398
1399 dev_dbg(&priv->client->dev,
1400 "%s : EXPOSURE control success\n", __func__);
1401 return 0;
1402
1403fail:
1404 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1405
1406 return err;
1407}
1408
1409/*
1410 * imx274_set_vflip - Function called when setting vertical flip
1411 * @priv: Pointer to device structure
1412 * @val: Value for vflip setting
1413 *
1414 * Set vertical flip based on input value.
1415 * val = 0: normal, no vertical flip
1416 * val = 1: vertical flip enabled
1417 * The caller should hold the mutex lock imx274->lock if necessary
1418 *
1419 * Return: 0 on success
1420 */
1421static int imx274_set_vflip(struct stimx274 *priv, int val)
1422{
1423 int err;
1424
1425 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val);
1426 if (err) {
1427 dev_err(&priv->client->dev, "VFILP control error\n");
1428 return err;
1429 }
1430
1431 dev_dbg(&priv->client->dev,
1432 "%s : VFLIP control success\n", __func__);
1433
1434 return 0;
1435}
1436
1437/*
1438 * imx274_set_test_pattern - Function called when setting test pattern
1439 * @priv: Pointer to device structure
1440 * @val: Variable for test pattern
1441 *
1442 * Set to different test patterns based on input value.
1443 *
1444 * Return: 0 on success
1445 */
1446static int imx274_set_test_pattern(struct stimx274 *priv, int val)
1447{
1448 int err = 0;
1449
1450 if (val == TEST_PATTERN_DISABLED) {
1451 err = imx274_write_table(priv, imx274_tp_disabled);
1452 } else if (val <= TEST_PATTERN_V_COLOR_BARS) {
1453 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1);
1454 if (!err)
1455 err = imx274_write_table(priv, imx274_tp_regs);
1456 } else {
1457 err = -EINVAL;
1458 }
1459
1460 if (!err)
1461 dev_dbg(&priv->client->dev,
1462 "%s : TEST PATTERN control success\n", __func__);
1463 else
1464 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1465
1466 return err;
1467}
1468
1469static inline void imx274_calculate_frame_length_regs(struct reg_8 regs[3],
1470 u32 frame_length)
1471{
1472 regs->addr = IMX274_FRAME_LENGTH_ADDR_1;
1473 regs->val = (frame_length >> IMX274_SHIFT_16_BITS)
1474 & IMX274_MASK_LSB_4_BITS;
1475 (regs + 1)->addr = IMX274_FRAME_LENGTH_ADDR_2;
1476 (regs + 1)->val = (frame_length >> IMX274_SHIFT_8_BITS)
1477 & IMX274_MASK_LSB_8_BITS;
1478 (regs + 2)->addr = IMX274_FRAME_LENGTH_ADDR_3;
1479 (regs + 2)->val = (frame_length) & IMX274_MASK_LSB_8_BITS;
1480}
1481
1482/*
1483 * imx274_set_frame_length - Function called when setting frame length
1484 * @priv: Pointer to device structure
1485 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length)
1486 *
1487 * Set frame length based on input value.
1488 *
1489 * Return: 0 on success
1490 */
1491static int imx274_set_frame_length(struct stimx274 *priv, u32 val)
1492{
1493 struct reg_8 reg_list[3];
1494 int err;
1495 u32 frame_length;
1496 int i;
1497
1498 dev_dbg(&priv->client->dev, "%s : input length = %d\n",
1499 __func__, val);
1500
1501 frame_length = (u32)val;
1502
1503 imx274_calculate_frame_length_regs(reg_list, frame_length);
1504 for (i = 0; i < ARRAY_SIZE(reg_list); i++) {
1505 err = imx274_write_reg(priv, reg_list[i].addr,
1506 reg_list[i].val);
1507 if (err)
1508 goto fail;
1509 }
1510
1511 return 0;
1512
1513fail:
1514 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1515 return err;
1516}
1517
1518/*
1519 * imx274_set_frame_interval - Function called when setting frame interval
1520 * @priv: Pointer to device structure
1521 * @frame_interval: Variable for frame interval
1522 *
1523 * Change frame interval by updating VMAX value
1524 * The caller should hold the mutex lock imx274->lock if necessary
1525 *
1526 * Return: 0 on success
1527 */
1528static int imx274_set_frame_interval(struct stimx274 *priv,
1529 struct v4l2_fract frame_interval)
1530{
1531 int err;
1532 u32 frame_length, req_frame_rate;
1533 u16 svr;
1534 u16 hmax;
1535 u8 reg_val[2];
1536
1537 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d",
1538 __func__, frame_interval.numerator,
1539 frame_interval.denominator);
1540
1541 if (frame_interval.numerator == 0) {
1542 err = -EINVAL;
1543 goto fail;
1544 }
1545
1546 req_frame_rate = (u32)(frame_interval.denominator
1547 / frame_interval.numerator);
1548
1549 /* boundary check */
1550 if (req_frame_rate > max_frame_rate[priv->mode_index]) {
1551 frame_interval.numerator = 1;
1552 frame_interval.denominator =
1553 max_frame_rate[priv->mode_index];
1554 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) {
1555 frame_interval.numerator = 1;
1556 frame_interval.denominator = IMX274_MIN_FRAME_RATE;
1557 }
1558
1559 /*
1560 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX
1561 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX
1562 */
1563
1564 /* SVR */
1565 err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, &reg_val[0]);
1566 if (err)
1567 goto fail;
1568 err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, &reg_val[1]);
1569 if (err)
1570 goto fail;
1571 svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
1572 dev_dbg(&priv->client->dev,
1573 "%s : register SVR = %d\n", __func__, svr);
1574
1575 /* HMAX */
1576 err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, &reg_val[0]);
1577 if (err)
1578 goto fail;
1579 err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, &reg_val[1]);
1580 if (err)
1581 goto fail;
1582 hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0];
1583 dev_dbg(&priv->client->dev,
1584 "%s : register HMAX = %d\n", __func__, hmax);
1585
1586 if (hmax == 0 || frame_interval.denominator == 0) {
1587 err = -EINVAL;
1588 goto fail;
1589 }
1590
1591 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax
1592 * frame_interval.numerator
1593 / frame_interval.denominator;
1594
1595 err = imx274_set_frame_length(priv, frame_length);
1596 if (err)
1597 goto fail;
1598
1599 priv->frame_interval = frame_interval;
1600 return 0;
1601
1602fail:
1603 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err);
1604 return err;
1605}
1606
1607static const struct v4l2_subdev_pad_ops imx274_pad_ops = {
1608 .get_fmt = imx274_get_fmt,
1609 .set_fmt = imx274_set_fmt,
1610};
1611
1612static const struct v4l2_subdev_video_ops imx274_video_ops = {
1613 .g_frame_interval = imx274_g_frame_interval,
1614 .s_frame_interval = imx274_s_frame_interval,
1615 .s_stream = imx274_s_stream,
1616};
1617
1618static const struct v4l2_subdev_ops imx274_subdev_ops = {
1619 .pad = &imx274_pad_ops,
1620 .video = &imx274_video_ops,
1621};
1622
1623static const struct v4l2_ctrl_ops imx274_ctrl_ops = {
1624 .s_ctrl = imx274_s_ctrl,
1625};
1626
1627static const struct of_device_id imx274_of_id_table[] = {
1628 { .compatible = "sony,imx274" },
1629 { }
1630};
1631MODULE_DEVICE_TABLE(of, imx274_of_id_table);
1632
1633static const struct i2c_device_id imx274_id[] = {
1634 { "IMX274", 0 },
1635 { }
1636};
1637MODULE_DEVICE_TABLE(i2c, imx274_id);
1638
1639static int imx274_probe(struct i2c_client *client,
1640 const struct i2c_device_id *id)
1641{
1642 struct v4l2_subdev *sd;
1643 struct stimx274 *imx274;
1644 int ret;
1645
1646 /* initialize imx274 */
1647 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL);
1648 if (!imx274)
1649 return -ENOMEM;
1650
1651 mutex_init(&imx274->lock);
1652
1653 /* initialize regmap */
1654 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config);
1655 if (IS_ERR(imx274->regmap)) {
1656 dev_err(&client->dev,
1657 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap));
1658 ret = -ENODEV;
1659 goto err_regmap;
1660 }
1661
1662 /* initialize subdevice */
1663 imx274->client = client;
1664 sd = &imx274->sd;
1665 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops);
1666 strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name));
1667 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1668
1669 /* initialize subdev media pad */
1670 imx274->pad.flags = MEDIA_PAD_FL_SOURCE;
1671 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1672 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad);
1673 if (ret < 0) {
1674 dev_err(&client->dev,
1675 "%s : media entity init Failed %d\n", __func__, ret);
1676 goto err_regmap;
1677 }
1678
1679 /* initialize sensor reset gpio */
1680 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1681 GPIOD_OUT_HIGH);
1682 if (IS_ERR(imx274->reset_gpio)) {
1683 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER)
1684 dev_err(&client->dev, "Reset GPIO not setup in DT");
1685 ret = PTR_ERR(imx274->reset_gpio);
1686 goto err_me;
1687 }
1688
1689 /* pull sensor out of reset */
1690 imx274_reset(imx274, 1);
1691
1692 /* initialize controls */
1693 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 2);
1694 if (ret < 0) {
1695 dev_err(&client->dev,
1696 "%s : ctrl handler init Failed\n", __func__);
1697 goto err_me;
1698 }
1699
1700 imx274->ctrls.handler.lock = &imx274->lock;
1701
1702 /* add new controls */
1703 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items(
1704 &imx274->ctrls.handler, &imx274_ctrl_ops,
1705 V4L2_CID_TEST_PATTERN,
1706 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu);
1707
1708 imx274->ctrls.gain = v4l2_ctrl_new_std(
1709 &imx274->ctrls.handler,
1710 &imx274_ctrl_ops,
1711 V4L2_CID_GAIN, IMX274_MIN_GAIN,
1712 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1,
1713 IMX274_DEF_GAIN);
1714
1715 imx274->ctrls.exposure = v4l2_ctrl_new_std(
1716 &imx274->ctrls.handler,
1717 &imx274_ctrl_ops,
1718 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME,
1719 1000000 / IMX274_DEF_FRAME_RATE, 1,
1720 IMX274_MIN_EXPOSURE_TIME);
1721
1722 imx274->ctrls.vflip = v4l2_ctrl_new_std(
1723 &imx274->ctrls.handler,
1724 &imx274_ctrl_ops,
1725 V4L2_CID_VFLIP, 0, 1, 1, 0);
1726
1727 imx274->sd.ctrl_handler = &imx274->ctrls.handler;
1728 if (imx274->ctrls.handler.error) {
1729 ret = imx274->ctrls.handler.error;
1730 goto err_ctrls;
1731 }
1732
1733 /* setup default controls */
1734 ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler);
1735 if (ret) {
1736 dev_err(&client->dev,
1737 "Error %d setup default controls\n", ret);
1738 goto err_ctrls;
1739 }
1740
1741 /* initialize format */
1742 imx274->mode_index = IMX274_MODE_3840X2160;
1743 imx274->format.width = imx274_formats[0].size.width;
1744 imx274->format.height = imx274_formats[0].size.height;
1745 imx274->format.field = V4L2_FIELD_NONE;
1746 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
1747 imx274->format.colorspace = V4L2_COLORSPACE_SRGB;
1748 imx274->frame_interval.numerator = 1;
1749 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE;
1750
1751 /* load default control values */
1752 ret = imx274_load_default(imx274);
1753 if (ret) {
1754 dev_err(&client->dev,
1755 "%s : imx274_load_default failed %d\n",
1756 __func__, ret);
1757 goto err_ctrls;
1758 }
1759
1760 /* register subdevice */
1761 ret = v4l2_async_register_subdev(sd);
1762 if (ret < 0) {
1763 dev_err(&client->dev,
1764 "%s : v4l2_async_register_subdev failed %d\n",
1765 __func__, ret);
1766 goto err_ctrls;
1767 }
1768
1769 dev_info(&client->dev, "imx274 : imx274 probe success !\n");
1770 return 0;
1771
1772err_ctrls:
781b045b 1773 v4l2_ctrl_handler_free(&imx274->ctrls.handler);
0985dd30
LL		 1774err_me:
1775 media_entity_cleanup(&sd->entity);
1776err_regmap:
1777 mutex_destroy(&imx274->lock);
1778 return ret;
1779}
1780
1781static int imx274_remove(struct i2c_client *client)
1782{
1783 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1784 struct stimx274 *imx274 = to_imx274(sd);
1785
1786 /* stop stream */
1787 imx274_write_table(imx274, mode_table[IMX274_MODE_STOP_STREAM]);
1788
1789 v4l2_async_unregister_subdev(sd);
781b045b 1790 v4l2_ctrl_handler_free(&imx274->ctrls.handler);
0985dd30
LL		 1791 media_entity_cleanup(&sd->entity);
1792 mutex_destroy(&imx274->lock);
1793 return 0;
1794}
1795
1796static struct i2c_driver imx274_i2c_driver = {
1797 .driver = {
1798 .name = DRIVER_NAME,
1799 .of_match_table = imx274_of_id_table,
1800 },
1801 .probe = imx274_probe,
1802 .remove = imx274_remove,
1803 .id_table = imx274_id,
1804};
1805
1806module_i2c_driver(imx274_i2c_driver);
1807
1808MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>");
1809MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver");
1810MODULE_LICENSE("GPL v2");
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