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); 600 601 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 */ 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 } 614 615 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 */ 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 } 682 683 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 */ 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 */ 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 */ 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 */ 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 */ 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 } 838 839 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 } 872 873 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 } 887 888 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 */ 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 } 950 951 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 */ 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 */ 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 */ 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 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 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 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 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 */ 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 */ 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 */ 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 */ 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 */ 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 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 */ 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 */ 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 */ 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 */ 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 */ 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 */ 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 */ 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 */ 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 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 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