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/consumer.h> 15 #include <linux/i2c.h> 16 #include <linux/init.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/pm_runtime.h> 20 #include <linux/regmap.h> 21 #include <linux/regulator/consumer.h> 22 #include <linux/slab.h> 23 #include <linux/v4l2-mediabus.h> 24 #include <linux/videodev2.h> 25 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-fwnode.h> 29 #include <media/v4l2-subdev.h> 30 31 /* 32 * See "SHR, SVR Setting" in datasheet 33 */ 34 #define IMX274_DEFAULT_FRAME_LENGTH (4550) 35 #define IMX274_MAX_FRAME_LENGTH (0x000fffff) 36 37 /* 38 * See "Frame Rate Adjustment" in datasheet 39 */ 40 #define IMX274_PIXCLK_CONST1 (72000000) 41 #define IMX274_PIXCLK_CONST2 (1000000) 42 43 /* 44 * The input gain is shifted by IMX274_GAIN_SHIFT to get 45 * decimal number. The real gain is 46 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) 47 */ 48 #define IMX274_GAIN_SHIFT (8) 49 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) 50 51 /* 52 * See "Analog Gain" and "Digital Gain" in datasheet 53 * min gain is 1X 54 * max gain is calculated based on IMX274_GAIN_REG_MAX 55 */ 56 #define IMX274_GAIN_REG_MAX (1957) 57 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) 58 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ 59 / (2048 - IMX274_GAIN_REG_MAX)) 60 #define IMX274_MAX_DIGITAL_GAIN (8) 61 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) 62 #define IMX274_GAIN_CONST (2048) /* for gain formula */ 63 64 /* 65 * 1 line time in us = (HMAX / 72), minimal is 4 lines 66 */ 67 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) 68 69 #define IMX274_MAX_WIDTH (3840) 70 #define IMX274_MAX_HEIGHT (2160) 71 #define IMX274_MAX_FRAME_RATE (120) 72 #define IMX274_MIN_FRAME_RATE (5) 73 #define IMX274_DEF_FRAME_RATE (60) 74 75 /* 76 * register SHR is limited to (SVR value + 1) x VMAX value - 4 77 */ 78 #define IMX274_SHR_LIMIT_CONST (4) 79 80 /* 81 * Min and max sensor reset delay (microseconds) 82 */ 83 #define IMX274_RESET_DELAY1 (2000) 84 #define IMX274_RESET_DELAY2 (2200) 85 86 /* 87 * shift and mask constants 88 */ 89 #define IMX274_SHIFT_8_BITS (8) 90 #define IMX274_SHIFT_16_BITS (16) 91 #define IMX274_MASK_LSB_2_BITS (0x03) 92 #define IMX274_MASK_LSB_3_BITS (0x07) 93 #define IMX274_MASK_LSB_4_BITS (0x0f) 94 #define IMX274_MASK_LSB_8_BITS (0x00ff) 95 96 #define DRIVER_NAME "IMX274" 97 98 /* 99 * IMX274 register definitions 100 */ 101 #define IMX274_SHR_REG_MSB 0x300D /* SHR */ 102 #define IMX274_SHR_REG_LSB 0x300C /* SHR */ 103 #define IMX274_SVR_REG_MSB 0x300F /* SVR */ 104 #define IMX274_SVR_REG_LSB 0x300E /* SVR */ 105 #define IMX274_HTRIM_EN_REG 0x3037 106 #define IMX274_HTRIM_START_REG_LSB 0x3038 107 #define IMX274_HTRIM_START_REG_MSB 0x3039 108 #define IMX274_HTRIM_END_REG_LSB 0x303A 109 #define IMX274_HTRIM_END_REG_MSB 0x303B 110 #define IMX274_VWIDCUTEN_REG 0x30DD 111 #define IMX274_VWIDCUT_REG_LSB 0x30DE 112 #define IMX274_VWIDCUT_REG_MSB 0x30DF 113 #define IMX274_VWINPOS_REG_LSB 0x30E0 114 #define IMX274_VWINPOS_REG_MSB 0x30E1 115 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130 116 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131 117 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132 118 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133 119 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */ 120 #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */ 121 #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */ 122 #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ 123 #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ 124 #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */ 125 #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */ 126 #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */ 127 #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ 128 #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */ 129 #define IMX274_STANDBY_REG 0x3000 /* STANDBY */ 130 131 #define IMX274_TABLE_WAIT_MS 0 132 #define IMX274_TABLE_END 1 133 134 /* regulator supplies */ 135 static const char * const imx274_supply_names[] = { 136 "vddl", /* IF (1.2V) supply */ 137 "vdig", /* Digital Core (1.8V) supply */ 138 "vana", /* Analog (2.8V) supply */ 139 }; 140 141 #define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names) 142 143 /* 144 * imx274 I2C operation related structure 145 */ 146 struct reg_8 { 147 u16 addr; 148 u8 val; 149 }; 150 151 static const struct regmap_config imx274_regmap_config = { 152 .reg_bits = 16, 153 .val_bits = 8, 154 .cache_type = REGCACHE_RBTREE, 155 }; 156 157 /* 158 * Parameters for each imx274 readout mode. 159 * 160 * These are the values to configure the sensor in one of the 161 * implemented modes. 162 * 163 * @init_regs: registers to initialize the mode 164 * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280) 165 * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720) 166 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate 167 * Adjustment (CSI-2)" in the datasheet) 168 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the 169 * datasheet) 170 * @max_fps: Maximum frames per second 171 * @nocpiop: Number of clocks per internal offset period (see "Integration Time 172 * in Each Readout Drive Mode (CSI-2)" in the datasheet) 173 */ 174 struct imx274_mode { 175 const struct reg_8 *init_regs; 176 u8 wbin_ratio; 177 u8 hbin_ratio; 178 int min_frame_len; 179 int min_SHR; 180 int max_fps; 181 int nocpiop; 182 }; 183 184 /* 185 * imx274 test pattern related structure 186 */ 187 enum { 188 TEST_PATTERN_DISABLED = 0, 189 TEST_PATTERN_ALL_000H, 190 TEST_PATTERN_ALL_FFFH, 191 TEST_PATTERN_ALL_555H, 192 TEST_PATTERN_ALL_AAAH, 193 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ 194 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ 195 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ 196 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ 197 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ 198 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ 199 TEST_PATTERN_H_COLOR_BARS, 200 TEST_PATTERN_V_COLOR_BARS, 201 }; 202 203 static const char * const tp_qmenu[] = { 204 "Disabled", 205 "All 000h Pattern", 206 "All FFFh Pattern", 207 "All 555h Pattern", 208 "All AAAh Pattern", 209 "Vertical Stripe (555h / AAAh)", 210 "Vertical Stripe (AAAh / 555h)", 211 "Vertical Stripe (000h / 555h)", 212 "Vertical Stripe (555h / 000h)", 213 "Vertical Stripe (000h / FFFh)", 214 "Vertical Stripe (FFFh / 000h)", 215 "Vertical Color Bars", 216 "Horizontal Color Bars", 217 }; 218 219 /* 220 * All-pixel scan mode (10-bit) 221 * imx274 mode1(refer to datasheet) register configuration with 222 * 3840x2160 resolution, raw10 data and mipi four lane output 223 */ 224 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { 225 {0x3004, 0x01}, 226 {0x3005, 0x01}, 227 {0x3006, 0x00}, 228 {0x3007, 0xa2}, 229 230 {0x3018, 0xA2}, /* output XVS, HVS */ 231 232 {0x306B, 0x05}, 233 {0x30E2, 0x01}, 234 235 {0x30EE, 0x01}, 236 {0x3342, 0x0A}, 237 {0x3343, 0x00}, 238 {0x3344, 0x16}, 239 {0x3345, 0x00}, 240 {0x33A6, 0x01}, 241 {0x3528, 0x0E}, 242 {0x3554, 0x1F}, 243 {0x3555, 0x01}, 244 {0x3556, 0x01}, 245 {0x3557, 0x01}, 246 {0x3558, 0x01}, 247 {0x3559, 0x00}, 248 {0x355A, 0x00}, 249 {0x35BA, 0x0E}, 250 {0x366A, 0x1B}, 251 {0x366B, 0x1A}, 252 {0x366C, 0x19}, 253 {0x366D, 0x17}, 254 {0x3A41, 0x08}, 255 256 {IMX274_TABLE_END, 0x00} 257 }; 258 259 /* 260 * Horizontal/vertical 2/2-line binning 261 * (Horizontal and vertical weightedbinning, 10-bit) 262 * imx274 mode3(refer to datasheet) register configuration with 263 * 1920x1080 resolution, raw10 data and mipi four lane output 264 */ 265 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { 266 {0x3004, 0x02}, 267 {0x3005, 0x21}, 268 {0x3006, 0x00}, 269 {0x3007, 0xb1}, 270 271 {0x3018, 0xA2}, /* output XVS, HVS */ 272 273 {0x306B, 0x05}, 274 {0x30E2, 0x02}, 275 276 {0x30EE, 0x01}, 277 {0x3342, 0x0A}, 278 {0x3343, 0x00}, 279 {0x3344, 0x1A}, 280 {0x3345, 0x00}, 281 {0x33A6, 0x01}, 282 {0x3528, 0x0E}, 283 {0x3554, 0x00}, 284 {0x3555, 0x01}, 285 {0x3556, 0x01}, 286 {0x3557, 0x01}, 287 {0x3558, 0x01}, 288 {0x3559, 0x00}, 289 {0x355A, 0x00}, 290 {0x35BA, 0x0E}, 291 {0x366A, 0x1B}, 292 {0x366B, 0x1A}, 293 {0x366C, 0x19}, 294 {0x366D, 0x17}, 295 {0x3A41, 0x08}, 296 297 {IMX274_TABLE_END, 0x00} 298 }; 299 300 /* 301 * Vertical 2/3 subsampling binning horizontal 3 binning 302 * imx274 mode5(refer to datasheet) register configuration with 303 * 1280x720 resolution, raw10 data and mipi four lane output 304 */ 305 static const struct reg_8 imx274_mode5_1280x720_raw10[] = { 306 {0x3004, 0x03}, 307 {0x3005, 0x31}, 308 {0x3006, 0x00}, 309 {0x3007, 0xa9}, 310 311 {0x3018, 0xA2}, /* output XVS, HVS */ 312 313 {0x306B, 0x05}, 314 {0x30E2, 0x03}, 315 316 {0x30EE, 0x01}, 317 {0x3342, 0x0A}, 318 {0x3343, 0x00}, 319 {0x3344, 0x1B}, 320 {0x3345, 0x00}, 321 {0x33A6, 0x01}, 322 {0x3528, 0x0E}, 323 {0x3554, 0x00}, 324 {0x3555, 0x01}, 325 {0x3556, 0x01}, 326 {0x3557, 0x01}, 327 {0x3558, 0x01}, 328 {0x3559, 0x00}, 329 {0x355A, 0x00}, 330 {0x35BA, 0x0E}, 331 {0x366A, 0x1B}, 332 {0x366B, 0x19}, 333 {0x366C, 0x17}, 334 {0x366D, 0x17}, 335 {0x3A41, 0x04}, 336 337 {IMX274_TABLE_END, 0x00} 338 }; 339 340 /* 341 * Vertical 2/8 subsampling horizontal 3 binning 342 * imx274 mode6(refer to datasheet) register configuration with 343 * 1280x540 resolution, raw10 data and mipi four lane output 344 */ 345 static const struct reg_8 imx274_mode6_1280x540_raw10[] = { 346 {0x3004, 0x04}, /* mode setting */ 347 {0x3005, 0x31}, 348 {0x3006, 0x00}, 349 {0x3007, 0x02}, /* mode setting */ 350 351 {0x3018, 0xA2}, /* output XVS, HVS */ 352 353 {0x306B, 0x05}, 354 {0x30E2, 0x04}, /* mode setting */ 355 356 {0x30EE, 0x01}, 357 {0x3342, 0x0A}, 358 {0x3343, 0x00}, 359 {0x3344, 0x16}, 360 {0x3345, 0x00}, 361 {0x33A6, 0x01}, 362 {0x3528, 0x0E}, 363 {0x3554, 0x1F}, 364 {0x3555, 0x01}, 365 {0x3556, 0x01}, 366 {0x3557, 0x01}, 367 {0x3558, 0x01}, 368 {0x3559, 0x00}, 369 {0x355A, 0x00}, 370 {0x35BA, 0x0E}, 371 {0x366A, 0x1B}, 372 {0x366B, 0x1A}, 373 {0x366C, 0x19}, 374 {0x366D, 0x17}, 375 {0x3A41, 0x04}, 376 377 {IMX274_TABLE_END, 0x00} 378 }; 379 380 /* 381 * imx274 first step register configuration for 382 * starting stream 383 */ 384 static const struct reg_8 imx274_start_1[] = { 385 {IMX274_STANDBY_REG, 0x12}, 386 387 /* PLRD: clock settings */ 388 {0x3120, 0xF0}, 389 {0x3121, 0x00}, 390 {0x3122, 0x02}, 391 {0x3129, 0x9C}, 392 {0x312A, 0x02}, 393 {0x312D, 0x02}, 394 395 {0x310B, 0x00}, 396 397 /* PLSTMG */ 398 {0x304C, 0x00}, /* PLSTMG01 */ 399 {0x304D, 0x03}, 400 {0x331C, 0x1A}, 401 {0x331D, 0x00}, 402 {0x3502, 0x02}, 403 {0x3529, 0x0E}, 404 {0x352A, 0x0E}, 405 {0x352B, 0x0E}, 406 {0x3538, 0x0E}, 407 {0x3539, 0x0E}, 408 {0x3553, 0x00}, 409 {0x357D, 0x05}, 410 {0x357F, 0x05}, 411 {0x3581, 0x04}, 412 {0x3583, 0x76}, 413 {0x3587, 0x01}, 414 {0x35BB, 0x0E}, 415 {0x35BC, 0x0E}, 416 {0x35BD, 0x0E}, 417 {0x35BE, 0x0E}, 418 {0x35BF, 0x0E}, 419 {0x366E, 0x00}, 420 {0x366F, 0x00}, 421 {0x3670, 0x00}, 422 {0x3671, 0x00}, 423 424 /* PSMIPI */ 425 {0x3304, 0x32}, /* PSMIPI1 */ 426 {0x3305, 0x00}, 427 {0x3306, 0x32}, 428 {0x3307, 0x00}, 429 {0x3590, 0x32}, 430 {0x3591, 0x00}, 431 {0x3686, 0x32}, 432 {0x3687, 0x00}, 433 434 {IMX274_TABLE_END, 0x00} 435 }; 436 437 /* 438 * imx274 second step register configuration for 439 * starting stream 440 */ 441 static const struct reg_8 imx274_start_2[] = { 442 {IMX274_STANDBY_REG, 0x00}, 443 {0x303E, 0x02}, /* SYS_MODE = 2 */ 444 {IMX274_TABLE_END, 0x00} 445 }; 446 447 /* 448 * imx274 third step register configuration for 449 * starting stream 450 */ 451 static const struct reg_8 imx274_start_3[] = { 452 {0x30F4, 0x00}, 453 {0x3018, 0xA2}, /* XHS VHS OUTPUT */ 454 {IMX274_TABLE_END, 0x00} 455 }; 456 457 /* 458 * imx274 register configuration for stopping stream 459 */ 460 static const struct reg_8 imx274_stop[] = { 461 {IMX274_STANDBY_REG, 0x01}, 462 {IMX274_TABLE_END, 0x00} 463 }; 464 465 /* 466 * imx274 disable test pattern register configuration 467 */ 468 static const struct reg_8 imx274_tp_disabled[] = { 469 {0x303C, 0x00}, 470 {0x377F, 0x00}, 471 {0x3781, 0x00}, 472 {0x370B, 0x00}, 473 {IMX274_TABLE_END, 0x00} 474 }; 475 476 /* 477 * imx274 test pattern register configuration 478 * reg 0x303D defines the test pattern modes 479 */ 480 static const struct reg_8 imx274_tp_regs[] = { 481 {0x303C, 0x11}, 482 {0x370E, 0x01}, 483 {0x377F, 0x01}, 484 {0x3781, 0x01}, 485 {0x370B, 0x11}, 486 {IMX274_TABLE_END, 0x00} 487 }; 488 489 /* nocpiop happens to be the same number for the implemented modes */ 490 static const struct imx274_mode imx274_modes[] = { 491 { 492 /* mode 1, 4K */ 493 .wbin_ratio = 1, /* 3840 */ 494 .hbin_ratio = 1, /* 2160 */ 495 .init_regs = imx274_mode1_3840x2160_raw10, 496 .min_frame_len = 4550, 497 .min_SHR = 12, 498 .max_fps = 60, 499 .nocpiop = 112, 500 }, 501 { 502 /* mode 3, 1080p */ 503 .wbin_ratio = 2, /* 1920 */ 504 .hbin_ratio = 2, /* 1080 */ 505 .init_regs = imx274_mode3_1920x1080_raw10, 506 .min_frame_len = 2310, 507 .min_SHR = 8, 508 .max_fps = 120, 509 .nocpiop = 112, 510 }, 511 { 512 /* mode 5, 720p */ 513 .wbin_ratio = 3, /* 1280 */ 514 .hbin_ratio = 3, /* 720 */ 515 .init_regs = imx274_mode5_1280x720_raw10, 516 .min_frame_len = 2310, 517 .min_SHR = 8, 518 .max_fps = 120, 519 .nocpiop = 112, 520 }, 521 { 522 /* mode 6, 540p */ 523 .wbin_ratio = 3, /* 1280 */ 524 .hbin_ratio = 4, /* 540 */ 525 .init_regs = imx274_mode6_1280x540_raw10, 526 .min_frame_len = 2310, 527 .min_SHR = 4, 528 .max_fps = 120, 529 .nocpiop = 112, 530 }, 531 }; 532 533 /* 534 * struct imx274_ctrls - imx274 ctrl structure 535 * @handler: V4L2 ctrl handler structure 536 * @exposure: Pointer to expsure ctrl structure 537 * @gain: Pointer to gain ctrl structure 538 * @vflip: Pointer to vflip ctrl structure 539 * @test_pattern: Pointer to test pattern ctrl structure 540 */ 541 struct imx274_ctrls { 542 struct v4l2_ctrl_handler handler; 543 struct v4l2_ctrl *exposure; 544 struct v4l2_ctrl *gain; 545 struct v4l2_ctrl *vflip; 546 struct v4l2_ctrl *test_pattern; 547 }; 548 549 /* 550 * struct stim274 - imx274 device structure 551 * @sd: V4L2 subdevice structure 552 * @pad: Media pad structure 553 * @client: Pointer to I2C client 554 * @ctrls: imx274 control structure 555 * @crop: rect to be captured 556 * @compose: compose rect, i.e. output resolution 557 * @format: V4L2 media bus frame format structure 558 * (width and height are in sync with the compose rect) 559 * @frame_rate: V4L2 frame rate structure 560 * @regmap: Pointer to regmap structure 561 * @reset_gpio: Pointer to reset gpio 562 * @supplies: List of analog and digital supply regulators 563 * @inck: Pointer to sensor input clock 564 * @lock: Mutex structure 565 * @mode: Parameters for the selected readout mode 566 */ 567 struct stimx274 { 568 struct v4l2_subdev sd; 569 struct media_pad pad; 570 struct i2c_client *client; 571 struct imx274_ctrls ctrls; 572 struct v4l2_rect crop; 573 struct v4l2_mbus_framefmt format; 574 struct v4l2_fract frame_interval; 575 struct regmap *regmap; 576 struct gpio_desc *reset_gpio; 577 struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES]; 578 struct clk *inck; 579 struct mutex lock; /* mutex lock for operations */ 580 const struct imx274_mode *mode; 581 }; 582 583 #define IMX274_ROUND(dim, step, flags) \ 584 ((flags) & V4L2_SEL_FLAG_GE \ 585 ? roundup((dim), (step)) \ 586 : ((flags) & V4L2_SEL_FLAG_LE \ 587 ? rounddown((dim), (step)) \ 588 : rounddown((dim) + (step) / 2, (step)))) 589 590 /* 591 * Function declaration 592 */ 593 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); 594 static int imx274_set_exposure(struct stimx274 *priv, int val); 595 static int imx274_set_vflip(struct stimx274 *priv, int val); 596 static int imx274_set_test_pattern(struct stimx274 *priv, int val); 597 static int __imx274_set_frame_interval(struct stimx274 *priv, 598 struct v4l2_fract frame_interval); 599 600 static inline void msleep_range(unsigned int delay_base) 601 { 602 usleep_range(delay_base * 1000, delay_base * 1000 + 500); 603 } 604 605 /* 606 * v4l2_ctrl and v4l2_subdev related operations 607 */ 608 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 609 { 610 return &container_of(ctrl->handler, 611 struct stimx274, ctrls.handler)->sd; 612 } 613 614 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) 615 { 616 return container_of(sd, struct stimx274, sd); 617 } 618 619 /* 620 * Writing a register table 621 * 622 * @priv: Pointer to device 623 * @table: Table containing register values (with optional delays) 624 * 625 * This is used to write register table into sensor's reg map. 626 * 627 * Return: 0 on success, errors otherwise 628 */ 629 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) 630 { 631 struct regmap *regmap = priv->regmap; 632 int err = 0; 633 const struct reg_8 *next; 634 u8 val; 635 636 int range_start = -1; 637 int range_count = 0; 638 u8 range_vals[16]; 639 int max_range_vals = ARRAY_SIZE(range_vals); 640 641 for (next = table;; next++) { 642 if ((next->addr != range_start + range_count) || 643 (next->addr == IMX274_TABLE_END) || 644 (next->addr == IMX274_TABLE_WAIT_MS) || 645 (range_count == max_range_vals)) { 646 if (range_count == 1) 647 err = regmap_write(regmap, 648 range_start, range_vals[0]); 649 else if (range_count > 1) 650 err = regmap_bulk_write(regmap, range_start, 651 &range_vals[0], 652 range_count); 653 else 654 err = 0; 655 656 if (err) 657 return err; 658 659 range_start = -1; 660 range_count = 0; 661 662 /* Handle special address values */ 663 if (next->addr == IMX274_TABLE_END) 664 break; 665 666 if (next->addr == IMX274_TABLE_WAIT_MS) { 667 msleep_range(next->val); 668 continue; 669 } 670 } 671 672 val = next->val; 673 674 if (range_start == -1) 675 range_start = next->addr; 676 677 range_vals[range_count++] = val; 678 } 679 return 0; 680 } 681 682 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) 683 { 684 int err; 685 686 err = regmap_write(priv->regmap, addr, val); 687 if (err) 688 dev_err(&priv->client->dev, 689 "%s : i2c write failed, %x = %x\n", __func__, 690 addr, val); 691 else 692 dev_dbg(&priv->client->dev, 693 "%s : addr 0x%x, val=0x%x\n", __func__, 694 addr, val); 695 return err; 696 } 697 698 /** 699 * imx274_read_mbreg - Read a multibyte register. 700 * 701 * Uses a bulk read where possible. 702 * 703 * @priv: Pointer to device structure 704 * @addr: Address of the LSB register. Other registers must be 705 * consecutive, least-to-most significant. 706 * @val: Pointer to store the register value (cpu endianness) 707 * @nbytes: Number of bytes to read (range: [1..3]). 708 * Other bytes are zet to 0. 709 * 710 * Return: 0 on success, errors otherwise 711 */ 712 static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val, 713 size_t nbytes) 714 { 715 __le32 val_le = 0; 716 int err; 717 718 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes); 719 if (err) { 720 dev_err(&priv->client->dev, 721 "%s : i2c bulk read failed, %x (%zu bytes)\n", 722 __func__, addr, nbytes); 723 } else { 724 *val = le32_to_cpu(val_le); 725 dev_dbg(&priv->client->dev, 726 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 727 __func__, addr, *val, nbytes); 728 } 729 730 return err; 731 } 732 733 /** 734 * imx274_write_mbreg - Write a multibyte register. 735 * 736 * Uses a bulk write where possible. 737 * 738 * @priv: Pointer to device structure 739 * @addr: Address of the LSB register. Other registers must be 740 * consecutive, least-to-most significant. 741 * @val: Value to be written to the register (cpu endianness) 742 * @nbytes: Number of bytes to write (range: [1..3]) 743 */ 744 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, 745 size_t nbytes) 746 { 747 __le32 val_le = cpu_to_le32(val); 748 int err; 749 750 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); 751 if (err) 752 dev_err(&priv->client->dev, 753 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", 754 __func__, addr, val, nbytes); 755 else 756 dev_dbg(&priv->client->dev, 757 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 758 __func__, addr, val, nbytes); 759 return err; 760 } 761 762 /* 763 * Set mode registers to start stream. 764 * @priv: Pointer to device structure 765 * 766 * Return: 0 on success, errors otherwise 767 */ 768 static int imx274_mode_regs(struct stimx274 *priv) 769 { 770 int err = 0; 771 772 err = imx274_write_table(priv, imx274_start_1); 773 if (err) 774 return err; 775 776 err = imx274_write_table(priv, priv->mode->init_regs); 777 778 return err; 779 } 780 781 /* 782 * imx274_start_stream - Function for starting stream per mode index 783 * @priv: Pointer to device structure 784 * 785 * Return: 0 on success, errors otherwise 786 */ 787 static int imx274_start_stream(struct stimx274 *priv) 788 { 789 int err = 0; 790 791 err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler); 792 if (err) { 793 dev_err(&priv->client->dev, "Error %d setup controls\n", err); 794 return err; 795 } 796 797 /* 798 * Refer to "Standby Cancel Sequence when using CSI-2" in 799 * imx274 datasheet, it should wait 10ms or more here. 800 * give it 1 extra ms for margin 801 */ 802 msleep_range(11); 803 err = imx274_write_table(priv, imx274_start_2); 804 if (err) 805 return err; 806 807 /* 808 * Refer to "Standby Cancel Sequence when using CSI-2" in 809 * imx274 datasheet, it should wait 7ms or more here. 810 * give it 1 extra ms for margin 811 */ 812 msleep_range(8); 813 err = imx274_write_table(priv, imx274_start_3); 814 if (err) 815 return err; 816 817 return 0; 818 } 819 820 /* 821 * imx274_reset - Function called to reset the sensor 822 * @priv: Pointer to device structure 823 * @rst: Input value for determining the sensor's end state after reset 824 * 825 * Set the senor in reset and then 826 * if rst = 0, keep it in reset; 827 * if rst = 1, bring it out of reset. 828 * 829 */ 830 static void imx274_reset(struct stimx274 *priv, int rst) 831 { 832 gpiod_set_value_cansleep(priv->reset_gpio, 0); 833 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 834 gpiod_set_value_cansleep(priv->reset_gpio, !!rst); 835 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 836 } 837 838 static int imx274_power_on(struct device *dev) 839 { 840 struct i2c_client *client = to_i2c_client(dev); 841 struct v4l2_subdev *sd = i2c_get_clientdata(client); 842 struct stimx274 *imx274 = to_imx274(sd); 843 int ret; 844 845 /* keep sensor in reset before power on */ 846 imx274_reset(imx274, 0); 847 848 ret = clk_prepare_enable(imx274->inck); 849 if (ret) { 850 dev_err(&imx274->client->dev, 851 "Failed to enable input clock: %d\n", ret); 852 return ret; 853 } 854 855 ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies); 856 if (ret) { 857 dev_err(&imx274->client->dev, 858 "Failed to enable regulators: %d\n", ret); 859 goto fail_reg; 860 } 861 862 udelay(2); 863 imx274_reset(imx274, 1); 864 865 return 0; 866 867 fail_reg: 868 clk_disable_unprepare(imx274->inck); 869 return ret; 870 } 871 872 static int imx274_power_off(struct device *dev) 873 { 874 struct i2c_client *client = to_i2c_client(dev); 875 struct v4l2_subdev *sd = i2c_get_clientdata(client); 876 struct stimx274 *imx274 = to_imx274(sd); 877 878 imx274_reset(imx274, 0); 879 880 regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies); 881 882 clk_disable_unprepare(imx274->inck); 883 884 return 0; 885 } 886 887 static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274) 888 { 889 unsigned int i; 890 891 for (i = 0; i < IMX274_NUM_SUPPLIES; i++) 892 imx274->supplies[i].supply = imx274_supply_names[i]; 893 894 return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES, 895 imx274->supplies); 896 } 897 898 /** 899 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls 900 * @ctrl: V4L2 control to be set 901 * 902 * This function is used to set the V4L2 controls for the imx274 sensor. 903 * 904 * Return: 0 on success, errors otherwise 905 */ 906 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) 907 { 908 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 909 struct stimx274 *imx274 = to_imx274(sd); 910 int ret = -EINVAL; 911 912 if (!pm_runtime_get_if_in_use(&imx274->client->dev)) 913 return 0; 914 915 dev_dbg(&imx274->client->dev, 916 "%s : s_ctrl: %s, value: %d\n", __func__, 917 ctrl->name, ctrl->val); 918 919 switch (ctrl->id) { 920 case V4L2_CID_EXPOSURE: 921 dev_dbg(&imx274->client->dev, 922 "%s : set V4L2_CID_EXPOSURE\n", __func__); 923 ret = imx274_set_exposure(imx274, ctrl->val); 924 break; 925 926 case V4L2_CID_GAIN: 927 dev_dbg(&imx274->client->dev, 928 "%s : set V4L2_CID_GAIN\n", __func__); 929 ret = imx274_set_gain(imx274, ctrl); 930 break; 931 932 case V4L2_CID_VFLIP: 933 dev_dbg(&imx274->client->dev, 934 "%s : set V4L2_CID_VFLIP\n", __func__); 935 ret = imx274_set_vflip(imx274, ctrl->val); 936 break; 937 938 case V4L2_CID_TEST_PATTERN: 939 dev_dbg(&imx274->client->dev, 940 "%s : set V4L2_CID_TEST_PATTERN\n", __func__); 941 ret = imx274_set_test_pattern(imx274, ctrl->val); 942 break; 943 } 944 945 pm_runtime_put(&imx274->client->dev); 946 947 return ret; 948 } 949 950 static int imx274_binning_goodness(struct stimx274 *imx274, 951 int w, int ask_w, 952 int h, int ask_h, u32 flags) 953 { 954 struct device *dev = &imx274->client->dev; 955 const int goodness = 100000; 956 int val = 0; 957 958 if (flags & V4L2_SEL_FLAG_GE) { 959 if (w < ask_w) 960 val -= goodness; 961 if (h < ask_h) 962 val -= goodness; 963 } 964 965 if (flags & V4L2_SEL_FLAG_LE) { 966 if (w > ask_w) 967 val -= goodness; 968 if (h > ask_h) 969 val -= goodness; 970 } 971 972 val -= abs(w - ask_w); 973 val -= abs(h - ask_h); 974 975 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", 976 __func__, ask_w, ask_h, w, h, val); 977 978 return val; 979 } 980 981 /** 982 * __imx274_change_compose - Helper function to change binning and set both 983 * compose and format. 984 * 985 * We have two entry points to change binning: set_fmt and 986 * set_selection(COMPOSE). Both have to compute the new output size 987 * and set it in both the compose rect and the frame format size. We 988 * also need to do the same things after setting cropping to restore 989 * 1:1 binning. 990 * 991 * This function contains the common code for these three cases, it 992 * has many arguments in order to accommodate the needs of all of 993 * them. 994 * 995 * Must be called with imx274->lock locked. 996 * 997 * @imx274: The device object 998 * @sd_state: The subdev state we are editing for TRY requests 999 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller 1000 * @width: Input-output parameter: set to the desired width before 1001 * the call, contains the chosen value after returning successfully 1002 * @height: Input-output parameter for height (see @width) 1003 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not 1004 * available (when called from set_fmt) 1005 */ 1006 static int __imx274_change_compose(struct stimx274 *imx274, 1007 struct v4l2_subdev_state *sd_state, 1008 u32 which, 1009 u32 *width, 1010 u32 *height, 1011 u32 flags) 1012 { 1013 struct device *dev = &imx274->client->dev; 1014 const struct v4l2_rect *cur_crop; 1015 struct v4l2_mbus_framefmt *tgt_fmt; 1016 unsigned int i; 1017 const struct imx274_mode *best_mode = &imx274_modes[0]; 1018 int best_goodness = INT_MIN; 1019 1020 if (which == V4L2_SUBDEV_FORMAT_TRY) { 1021 cur_crop = v4l2_subdev_state_get_crop(sd_state, 0); 1022 tgt_fmt = v4l2_subdev_state_get_format(sd_state, 0); 1023 } else { 1024 cur_crop = &imx274->crop; 1025 tgt_fmt = &imx274->format; 1026 } 1027 1028 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) { 1029 u8 wratio = imx274_modes[i].wbin_ratio; 1030 u8 hratio = imx274_modes[i].hbin_ratio; 1031 1032 int goodness = imx274_binning_goodness( 1033 imx274, 1034 cur_crop->width / wratio, *width, 1035 cur_crop->height / hratio, *height, 1036 flags); 1037 1038 if (goodness >= best_goodness) { 1039 best_goodness = goodness; 1040 best_mode = &imx274_modes[i]; 1041 } 1042 } 1043 1044 *width = cur_crop->width / best_mode->wbin_ratio; 1045 *height = cur_crop->height / best_mode->hbin_ratio; 1046 1047 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) 1048 imx274->mode = best_mode; 1049 1050 dev_dbg(dev, "%s: selected %ux%u binning\n", 1051 __func__, best_mode->wbin_ratio, best_mode->hbin_ratio); 1052 1053 tgt_fmt->width = *width; 1054 tgt_fmt->height = *height; 1055 tgt_fmt->field = V4L2_FIELD_NONE; 1056 1057 return 0; 1058 } 1059 1060 /** 1061 * imx274_get_fmt - Get the pad format 1062 * @sd: Pointer to V4L2 Sub device structure 1063 * @sd_state: Pointer to sub device state structure 1064 * @fmt: Pointer to pad level media bus format 1065 * 1066 * This function is used to get the pad format information. 1067 * 1068 * Return: 0 on success 1069 */ 1070 static int imx274_get_fmt(struct v4l2_subdev *sd, 1071 struct v4l2_subdev_state *sd_state, 1072 struct v4l2_subdev_format *fmt) 1073 { 1074 struct stimx274 *imx274 = to_imx274(sd); 1075 1076 mutex_lock(&imx274->lock); 1077 fmt->format = imx274->format; 1078 mutex_unlock(&imx274->lock); 1079 return 0; 1080 } 1081 1082 /** 1083 * imx274_set_fmt - This is used to set the pad format 1084 * @sd: Pointer to V4L2 Sub device structure 1085 * @sd_state: Pointer to sub device state information structure 1086 * @format: Pointer to pad level media bus format 1087 * 1088 * This function is used to set the pad format. 1089 * 1090 * Return: 0 on success 1091 */ 1092 static int imx274_set_fmt(struct v4l2_subdev *sd, 1093 struct v4l2_subdev_state *sd_state, 1094 struct v4l2_subdev_format *format) 1095 { 1096 struct v4l2_mbus_framefmt *fmt = &format->format; 1097 struct stimx274 *imx274 = to_imx274(sd); 1098 int err = 0; 1099 1100 mutex_lock(&imx274->lock); 1101 1102 err = __imx274_change_compose(imx274, sd_state, format->which, 1103 &fmt->width, &fmt->height, 0); 1104 1105 if (err) 1106 goto out; 1107 1108 /* 1109 * __imx274_change_compose already set width and height in the 1110 * applicable format, but we need to keep all other format 1111 * values, so do a full copy here 1112 */ 1113 fmt->field = V4L2_FIELD_NONE; 1114 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 1115 *v4l2_subdev_state_get_format(sd_state, 0) = *fmt; 1116 else 1117 imx274->format = *fmt; 1118 1119 out: 1120 mutex_unlock(&imx274->lock); 1121 1122 return err; 1123 } 1124 1125 static int imx274_get_selection(struct v4l2_subdev *sd, 1126 struct v4l2_subdev_state *sd_state, 1127 struct v4l2_subdev_selection *sel) 1128 { 1129 struct stimx274 *imx274 = to_imx274(sd); 1130 const struct v4l2_rect *src_crop; 1131 const struct v4l2_mbus_framefmt *src_fmt; 1132 int ret = 0; 1133 1134 if (sel->pad != 0) 1135 return -EINVAL; 1136 1137 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { 1138 sel->r.left = 0; 1139 sel->r.top = 0; 1140 sel->r.width = IMX274_MAX_WIDTH; 1141 sel->r.height = IMX274_MAX_HEIGHT; 1142 return 0; 1143 } 1144 1145 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1146 src_crop = v4l2_subdev_state_get_crop(sd_state, 0); 1147 src_fmt = v4l2_subdev_state_get_format(sd_state, 0); 1148 } else { 1149 src_crop = &imx274->crop; 1150 src_fmt = &imx274->format; 1151 } 1152 1153 mutex_lock(&imx274->lock); 1154 1155 switch (sel->target) { 1156 case V4L2_SEL_TGT_CROP: 1157 sel->r = *src_crop; 1158 break; 1159 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1160 sel->r.top = 0; 1161 sel->r.left = 0; 1162 sel->r.width = src_crop->width; 1163 sel->r.height = src_crop->height; 1164 break; 1165 case V4L2_SEL_TGT_COMPOSE: 1166 sel->r.top = 0; 1167 sel->r.left = 0; 1168 sel->r.width = src_fmt->width; 1169 sel->r.height = src_fmt->height; 1170 break; 1171 default: 1172 ret = -EINVAL; 1173 } 1174 1175 mutex_unlock(&imx274->lock); 1176 1177 return ret; 1178 } 1179 1180 static int imx274_set_selection_crop(struct stimx274 *imx274, 1181 struct v4l2_subdev_state *sd_state, 1182 struct v4l2_subdev_selection *sel) 1183 { 1184 struct v4l2_rect *tgt_crop; 1185 struct v4l2_rect new_crop; 1186 bool size_changed; 1187 1188 /* 1189 * h_step could be 12 or 24 depending on the binning. But we 1190 * won't know the binning until we choose the mode later in 1191 * __imx274_change_compose(). Thus let's be safe and use the 1192 * most conservative value in all cases. 1193 */ 1194 const u32 h_step = 24; 1195 1196 new_crop.width = min_t(u32, 1197 IMX274_ROUND(sel->r.width, h_step, sel->flags), 1198 IMX274_MAX_WIDTH); 1199 1200 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ 1201 if (new_crop.width < 144) 1202 new_crop.width = 144; 1203 1204 new_crop.left = min_t(u32, 1205 IMX274_ROUND(sel->r.left, h_step, 0), 1206 IMX274_MAX_WIDTH - new_crop.width); 1207 1208 new_crop.height = min_t(u32, 1209 IMX274_ROUND(sel->r.height, 2, sel->flags), 1210 IMX274_MAX_HEIGHT); 1211 1212 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), 1213 IMX274_MAX_HEIGHT - new_crop.height); 1214 1215 sel->r = new_crop; 1216 1217 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1218 tgt_crop = v4l2_subdev_state_get_crop(sd_state, 0); 1219 else 1220 tgt_crop = &imx274->crop; 1221 1222 mutex_lock(&imx274->lock); 1223 1224 size_changed = (new_crop.width != tgt_crop->width || 1225 new_crop.height != tgt_crop->height); 1226 1227 /* __imx274_change_compose needs the new size in *tgt_crop */ 1228 *tgt_crop = new_crop; 1229 1230 /* if crop size changed then reset the output image size */ 1231 if (size_changed) 1232 __imx274_change_compose(imx274, sd_state, sel->which, 1233 &new_crop.width, &new_crop.height, 1234 sel->flags); 1235 1236 mutex_unlock(&imx274->lock); 1237 1238 return 0; 1239 } 1240 1241 static int imx274_set_selection(struct v4l2_subdev *sd, 1242 struct v4l2_subdev_state *sd_state, 1243 struct v4l2_subdev_selection *sel) 1244 { 1245 struct stimx274 *imx274 = to_imx274(sd); 1246 1247 if (sel->pad != 0) 1248 return -EINVAL; 1249 1250 if (sel->target == V4L2_SEL_TGT_CROP) 1251 return imx274_set_selection_crop(imx274, sd_state, sel); 1252 1253 if (sel->target == V4L2_SEL_TGT_COMPOSE) { 1254 int err; 1255 1256 mutex_lock(&imx274->lock); 1257 err = __imx274_change_compose(imx274, sd_state, sel->which, 1258 &sel->r.width, &sel->r.height, 1259 sel->flags); 1260 mutex_unlock(&imx274->lock); 1261 1262 /* 1263 * __imx274_change_compose already set width and 1264 * height in set->r, we still need to set top-left 1265 */ 1266 if (!err) { 1267 sel->r.top = 0; 1268 sel->r.left = 0; 1269 } 1270 1271 return err; 1272 } 1273 1274 return -EINVAL; 1275 } 1276 1277 static int imx274_apply_trimming(struct stimx274 *imx274) 1278 { 1279 u32 h_start; 1280 u32 h_end; 1281 u32 hmax; 1282 u32 v_cut; 1283 s32 v_pos; 1284 u32 write_v_size; 1285 u32 y_out_size; 1286 int err; 1287 1288 h_start = imx274->crop.left + 12; 1289 h_end = h_start + imx274->crop.width; 1290 1291 /* Use the minimum allowed value of HMAX */ 1292 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ 1293 /* Note: 260 is the minimum HMAX in all implemented modes */ 1294 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); 1295 1296 /* invert v_pos if VFLIP */ 1297 v_pos = imx274->ctrls.vflip->cur.val ? 1298 (-imx274->crop.top / 2) : (imx274->crop.top / 2); 1299 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; 1300 write_v_size = imx274->crop.height + 22; 1301 y_out_size = imx274->crop.height; 1302 1303 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); 1304 if (!err) 1305 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); 1306 if (!err) 1307 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, 1308 h_start, 2); 1309 if (!err) 1310 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, 1311 h_end, 2); 1312 if (!err) 1313 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); 1314 if (!err) 1315 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, 1316 v_cut, 2); 1317 if (!err) 1318 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, 1319 v_pos, 2); 1320 if (!err) 1321 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, 1322 write_v_size, 2); 1323 if (!err) 1324 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, 1325 y_out_size, 2); 1326 1327 return err; 1328 } 1329 1330 static int imx274_get_frame_interval(struct v4l2_subdev *sd, 1331 struct v4l2_subdev_state *sd_state, 1332 struct v4l2_subdev_frame_interval *fi) 1333 { 1334 struct stimx274 *imx274 = to_imx274(sd); 1335 1336 /* 1337 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1338 * subdev active state API. 1339 */ 1340 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1341 return -EINVAL; 1342 1343 fi->interval = imx274->frame_interval; 1344 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", 1345 __func__, imx274->frame_interval.numerator, 1346 imx274->frame_interval.denominator); 1347 1348 return 0; 1349 } 1350 1351 static int imx274_set_frame_interval(struct v4l2_subdev *sd, 1352 struct v4l2_subdev_state *sd_state, 1353 struct v4l2_subdev_frame_interval *fi) 1354 { 1355 struct stimx274 *imx274 = to_imx274(sd); 1356 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; 1357 int min, max, def; 1358 int ret; 1359 1360 /* 1361 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1362 * subdev active state API. 1363 */ 1364 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1365 return -EINVAL; 1366 1367 ret = pm_runtime_resume_and_get(&imx274->client->dev); 1368 if (ret < 0) 1369 return ret; 1370 1371 mutex_lock(&imx274->lock); 1372 ret = __imx274_set_frame_interval(imx274, fi->interval); 1373 1374 if (!ret) { 1375 fi->interval = imx274->frame_interval; 1376 1377 /* 1378 * exposure time range is decided by frame interval 1379 * need to update it after frame interval changes 1380 */ 1381 min = IMX274_MIN_EXPOSURE_TIME; 1382 max = fi->interval.numerator * 1000000 1383 / fi->interval.denominator; 1384 def = max; 1385 ret = __v4l2_ctrl_modify_range(ctrl, min, max, 1, def); 1386 if (ret) { 1387 dev_err(&imx274->client->dev, 1388 "Exposure ctrl range update failed\n"); 1389 goto unlock; 1390 } 1391 1392 /* update exposure time accordingly */ 1393 imx274_set_exposure(imx274, ctrl->val); 1394 1395 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", 1396 fi->interval.numerator * 1000000 1397 / fi->interval.denominator); 1398 } 1399 1400 unlock: 1401 mutex_unlock(&imx274->lock); 1402 pm_runtime_put(&imx274->client->dev); 1403 1404 return ret; 1405 } 1406 1407 /** 1408 * imx274_load_default - load default control values 1409 * @priv: Pointer to device structure 1410 * 1411 * Return: 0 on success, errors otherwise 1412 */ 1413 static void imx274_load_default(struct stimx274 *priv) 1414 { 1415 /* load default control values */ 1416 priv->frame_interval.numerator = 1; 1417 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1418 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; 1419 priv->ctrls.gain->val = IMX274_DEF_GAIN; 1420 priv->ctrls.vflip->val = 0; 1421 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; 1422 } 1423 1424 /** 1425 * imx274_s_stream - It is used to start/stop the streaming. 1426 * @sd: V4L2 Sub device 1427 * @on: Flag (True / False) 1428 * 1429 * This function controls the start or stop of streaming for the 1430 * imx274 sensor. 1431 * 1432 * Return: 0 on success, errors otherwise 1433 */ 1434 static int imx274_s_stream(struct v4l2_subdev *sd, int on) 1435 { 1436 struct stimx274 *imx274 = to_imx274(sd); 1437 int ret = 0; 1438 1439 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, 1440 on ? "Stream Start" : "Stream Stop", 1441 imx274->mode - &imx274_modes[0]); 1442 1443 mutex_lock(&imx274->lock); 1444 1445 if (on) { 1446 ret = pm_runtime_resume_and_get(&imx274->client->dev); 1447 if (ret < 0) { 1448 mutex_unlock(&imx274->lock); 1449 return ret; 1450 } 1451 1452 /* load mode registers */ 1453 ret = imx274_mode_regs(imx274); 1454 if (ret) 1455 goto fail; 1456 1457 ret = imx274_apply_trimming(imx274); 1458 if (ret) 1459 goto fail; 1460 1461 /* 1462 * update frame rate & exposure. if the last mode is different, 1463 * HMAX could be changed. As the result, frame rate & exposure 1464 * are changed. 1465 * gain is not affected. 1466 */ 1467 ret = __imx274_set_frame_interval(imx274, 1468 imx274->frame_interval); 1469 if (ret) 1470 goto fail; 1471 1472 /* start stream */ 1473 ret = imx274_start_stream(imx274); 1474 if (ret) 1475 goto fail; 1476 } else { 1477 /* stop stream */ 1478 ret = imx274_write_table(imx274, imx274_stop); 1479 if (ret) 1480 goto fail; 1481 1482 pm_runtime_put(&imx274->client->dev); 1483 } 1484 1485 mutex_unlock(&imx274->lock); 1486 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); 1487 return 0; 1488 1489 fail: 1490 pm_runtime_put(&imx274->client->dev); 1491 mutex_unlock(&imx274->lock); 1492 dev_err(&imx274->client->dev, "s_stream failed\n"); 1493 return ret; 1494 } 1495 1496 /* 1497 * imx274_get_frame_length - Function for obtaining current frame length 1498 * @priv: Pointer to device structure 1499 * @val: Pointer to obtained value 1500 * 1501 * frame_length = vmax x (svr + 1), in unit of hmax. 1502 * 1503 * Return: 0 on success 1504 */ 1505 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) 1506 { 1507 int err; 1508 u32 svr; 1509 u32 vmax; 1510 1511 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1512 if (err) 1513 goto fail; 1514 1515 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3); 1516 if (err) 1517 goto fail; 1518 1519 *val = vmax * (svr + 1); 1520 1521 return 0; 1522 1523 fail: 1524 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1525 return err; 1526 } 1527 1528 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, 1529 u32 *frame_length) 1530 { 1531 int err; 1532 1533 err = imx274_get_frame_length(priv, frame_length); 1534 if (err) 1535 return err; 1536 1537 if (*frame_length < priv->mode->min_frame_len) 1538 *frame_length = priv->mode->min_frame_len; 1539 1540 *val = *frame_length - *val; /* convert to raw shr */ 1541 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) 1542 *val = *frame_length - IMX274_SHR_LIMIT_CONST; 1543 else if (*val < priv->mode->min_SHR) 1544 *val = priv->mode->min_SHR; 1545 1546 return 0; 1547 } 1548 1549 /* 1550 * imx274_set_digital gain - Function called when setting digital gain 1551 * @priv: Pointer to device structure 1552 * @dgain: Value of digital gain. 1553 * 1554 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x 1555 * 1556 * Return: 0 on success 1557 */ 1558 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) 1559 { 1560 u8 reg_val; 1561 1562 reg_val = ffs(dgain); 1563 1564 if (reg_val) 1565 reg_val--; 1566 1567 reg_val = clamp(reg_val, (u8)0, (u8)3); 1568 1569 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, 1570 reg_val & IMX274_MASK_LSB_4_BITS); 1571 } 1572 1573 /* 1574 * imx274_set_gain - Function called when setting gain 1575 * @priv: Pointer to device structure 1576 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; 1577 * @ctrl: v4l2 control pointer 1578 * 1579 * Set the gain based on input value. 1580 * The caller should hold the mutex lock imx274->lock if necessary 1581 * 1582 * Return: 0 on success 1583 */ 1584 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) 1585 { 1586 int err; 1587 u32 gain, analog_gain, digital_gain, gain_reg; 1588 1589 gain = (u32)(ctrl->val); 1590 1591 dev_dbg(&priv->client->dev, 1592 "%s : input gain = %d.%d\n", __func__, 1593 gain >> IMX274_GAIN_SHIFT, 1594 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); 1595 1596 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) 1597 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; 1598 else if (gain < IMX274_MIN_GAIN) 1599 gain = IMX274_MIN_GAIN; 1600 1601 if (gain <= IMX274_MAX_ANALOG_GAIN) 1602 digital_gain = 1; 1603 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) 1604 digital_gain = 2; 1605 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) 1606 digital_gain = 4; 1607 else 1608 digital_gain = IMX274_MAX_DIGITAL_GAIN; 1609 1610 analog_gain = gain / digital_gain; 1611 1612 dev_dbg(&priv->client->dev, 1613 "%s : digital gain = %d, analog gain = %d.%d\n", 1614 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, 1615 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) 1616 >> IMX274_GAIN_SHIFT); 1617 1618 err = imx274_set_digital_gain(priv, digital_gain); 1619 if (err) 1620 goto fail; 1621 1622 /* convert to register value, refer to imx274 datasheet */ 1623 gain_reg = (u32)IMX274_GAIN_CONST - 1624 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; 1625 if (gain_reg > IMX274_GAIN_REG_MAX) 1626 gain_reg = IMX274_GAIN_REG_MAX; 1627 1628 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 1629 2); 1630 if (err) 1631 goto fail; 1632 1633 if (IMX274_GAIN_CONST - gain_reg == 0) { 1634 err = -EINVAL; 1635 goto fail; 1636 } 1637 1638 /* convert register value back to gain value */ 1639 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) 1640 / (IMX274_GAIN_CONST - gain_reg) * digital_gain; 1641 1642 dev_dbg(&priv->client->dev, 1643 "%s : GAIN control success, gain_reg = %d, new gain = %d\n", 1644 __func__, gain_reg, ctrl->val); 1645 1646 return 0; 1647 1648 fail: 1649 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1650 return err; 1651 } 1652 1653 /* 1654 * imx274_set_coarse_time - Function called when setting SHR value 1655 * @priv: Pointer to device structure 1656 * @val: Value for exposure time in number of line_length, or [HMAX] 1657 * 1658 * Set SHR value based on input value. 1659 * 1660 * Return: 0 on success 1661 */ 1662 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) 1663 { 1664 int err; 1665 u32 coarse_time, frame_length; 1666 1667 coarse_time = *val; 1668 1669 /* convert exposure_time to appropriate SHR value */ 1670 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); 1671 if (err) 1672 goto fail; 1673 1674 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); 1675 if (err) 1676 goto fail; 1677 1678 *val = frame_length - coarse_time; 1679 return 0; 1680 1681 fail: 1682 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1683 return err; 1684 } 1685 1686 /* 1687 * imx274_set_exposure - Function called when setting exposure time 1688 * @priv: Pointer to device structure 1689 * @val: Variable for exposure time, in the unit of micro-second 1690 * 1691 * Set exposure time based on input value. 1692 * The caller should hold the mutex lock imx274->lock if necessary 1693 * 1694 * Return: 0 on success 1695 */ 1696 static int imx274_set_exposure(struct stimx274 *priv, int val) 1697 { 1698 int err; 1699 u32 hmax; 1700 u32 coarse_time; /* exposure time in unit of line (HMAX)*/ 1701 1702 dev_dbg(&priv->client->dev, 1703 "%s : EXPOSURE control input = %d\n", __func__, val); 1704 1705 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ 1706 1707 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1708 if (err) 1709 goto fail; 1710 1711 if (hmax == 0) { 1712 err = -EINVAL; 1713 goto fail; 1714 } 1715 1716 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val 1717 - priv->mode->nocpiop) / hmax; 1718 1719 /* step 2: convert exposure_time into SHR value */ 1720 1721 /* set SHR */ 1722 err = imx274_set_coarse_time(priv, &coarse_time); 1723 if (err) 1724 goto fail; 1725 1726 priv->ctrls.exposure->val = 1727 (coarse_time * hmax + priv->mode->nocpiop) 1728 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); 1729 1730 dev_dbg(&priv->client->dev, 1731 "%s : EXPOSURE control success\n", __func__); 1732 return 0; 1733 1734 fail: 1735 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1736 1737 return err; 1738 } 1739 1740 /* 1741 * imx274_set_vflip - Function called when setting vertical flip 1742 * @priv: Pointer to device structure 1743 * @val: Value for vflip setting 1744 * 1745 * Set vertical flip based on input value. 1746 * val = 0: normal, no vertical flip 1747 * val = 1: vertical flip enabled 1748 * The caller should hold the mutex lock imx274->lock if necessary 1749 * 1750 * Return: 0 on success 1751 */ 1752 static int imx274_set_vflip(struct stimx274 *priv, int val) 1753 { 1754 int err; 1755 1756 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); 1757 if (err) { 1758 dev_err(&priv->client->dev, "VFLIP control error\n"); 1759 return err; 1760 } 1761 1762 dev_dbg(&priv->client->dev, 1763 "%s : VFLIP control success\n", __func__); 1764 1765 return 0; 1766 } 1767 1768 /* 1769 * imx274_set_test_pattern - Function called when setting test pattern 1770 * @priv: Pointer to device structure 1771 * @val: Variable for test pattern 1772 * 1773 * Set to different test patterns based on input value. 1774 * 1775 * Return: 0 on success 1776 */ 1777 static int imx274_set_test_pattern(struct stimx274 *priv, int val) 1778 { 1779 int err = 0; 1780 1781 if (val == TEST_PATTERN_DISABLED) { 1782 err = imx274_write_table(priv, imx274_tp_disabled); 1783 } else if (val <= TEST_PATTERN_V_COLOR_BARS) { 1784 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); 1785 if (!err) 1786 err = imx274_write_table(priv, imx274_tp_regs); 1787 } else { 1788 err = -EINVAL; 1789 } 1790 1791 if (!err) 1792 dev_dbg(&priv->client->dev, 1793 "%s : TEST PATTERN control success\n", __func__); 1794 else 1795 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1796 1797 return err; 1798 } 1799 1800 /* 1801 * imx274_set_frame_length - Function called when setting frame length 1802 * @priv: Pointer to device structure 1803 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) 1804 * 1805 * Set frame length based on input value. 1806 * 1807 * Return: 0 on success 1808 */ 1809 static int imx274_set_frame_length(struct stimx274 *priv, u32 val) 1810 { 1811 int err; 1812 u32 frame_length; 1813 1814 dev_dbg(&priv->client->dev, "%s : input length = %d\n", 1815 __func__, val); 1816 1817 frame_length = (u32)val; 1818 1819 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); 1820 if (err) 1821 goto fail; 1822 1823 return 0; 1824 1825 fail: 1826 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1827 return err; 1828 } 1829 1830 /* 1831 * __imx274_set_frame_interval - Function called when setting frame interval 1832 * @priv: Pointer to device structure 1833 * @frame_interval: Variable for frame interval 1834 * 1835 * Change frame interval by updating VMAX value 1836 * The caller should hold the mutex lock imx274->lock if necessary 1837 * 1838 * Return: 0 on success 1839 */ 1840 static int __imx274_set_frame_interval(struct stimx274 *priv, 1841 struct v4l2_fract frame_interval) 1842 { 1843 int err; 1844 u32 frame_length, req_frame_rate; 1845 u32 svr; 1846 u32 hmax; 1847 1848 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", 1849 __func__, frame_interval.numerator, 1850 frame_interval.denominator); 1851 1852 if (frame_interval.numerator == 0 || frame_interval.denominator == 0) { 1853 frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1854 frame_interval.numerator = 1; 1855 } 1856 1857 req_frame_rate = (u32)(frame_interval.denominator 1858 / frame_interval.numerator); 1859 1860 /* boundary check */ 1861 if (req_frame_rate > priv->mode->max_fps) { 1862 frame_interval.numerator = 1; 1863 frame_interval.denominator = priv->mode->max_fps; 1864 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { 1865 frame_interval.numerator = 1; 1866 frame_interval.denominator = IMX274_MIN_FRAME_RATE; 1867 } 1868 1869 /* 1870 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX 1871 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX 1872 */ 1873 1874 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1875 if (err) 1876 goto fail; 1877 1878 dev_dbg(&priv->client->dev, 1879 "%s : register SVR = %d\n", __func__, svr); 1880 1881 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1882 if (err) 1883 goto fail; 1884 1885 dev_dbg(&priv->client->dev, 1886 "%s : register HMAX = %d\n", __func__, hmax); 1887 1888 if (hmax == 0 || frame_interval.denominator == 0) { 1889 err = -EINVAL; 1890 goto fail; 1891 } 1892 1893 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax 1894 * frame_interval.numerator 1895 / frame_interval.denominator; 1896 1897 err = imx274_set_frame_length(priv, frame_length); 1898 if (err) 1899 goto fail; 1900 1901 priv->frame_interval = frame_interval; 1902 return 0; 1903 1904 fail: 1905 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1906 return err; 1907 } 1908 1909 static int imx274_enum_mbus_code(struct v4l2_subdev *sd, 1910 struct v4l2_subdev_state *sd_state, 1911 struct v4l2_subdev_mbus_code_enum *code) 1912 { 1913 if (code->index > 0) 1914 return -EINVAL; 1915 1916 /* only supported format in the driver is Raw 10 bits SRGGB */ 1917 code->code = MEDIA_BUS_FMT_SRGGB10_1X10; 1918 1919 return 0; 1920 } 1921 1922 static const struct v4l2_subdev_pad_ops imx274_pad_ops = { 1923 .enum_mbus_code = imx274_enum_mbus_code, 1924 .get_fmt = imx274_get_fmt, 1925 .set_fmt = imx274_set_fmt, 1926 .get_selection = imx274_get_selection, 1927 .set_selection = imx274_set_selection, 1928 .get_frame_interval = imx274_get_frame_interval, 1929 .set_frame_interval = imx274_set_frame_interval, 1930 }; 1931 1932 static const struct v4l2_subdev_video_ops imx274_video_ops = { 1933 .s_stream = imx274_s_stream, 1934 }; 1935 1936 static const struct v4l2_subdev_ops imx274_subdev_ops = { 1937 .pad = &imx274_pad_ops, 1938 .video = &imx274_video_ops, 1939 }; 1940 1941 static const struct v4l2_ctrl_ops imx274_ctrl_ops = { 1942 .s_ctrl = imx274_s_ctrl, 1943 }; 1944 1945 static const struct of_device_id imx274_of_id_table[] = { 1946 { .compatible = "sony,imx274" }, 1947 { } 1948 }; 1949 MODULE_DEVICE_TABLE(of, imx274_of_id_table); 1950 1951 static const struct i2c_device_id imx274_id[] = { 1952 { "IMX274", 0 }, 1953 { } 1954 }; 1955 MODULE_DEVICE_TABLE(i2c, imx274_id); 1956 1957 static int imx274_fwnode_parse(struct device *dev) 1958 { 1959 struct fwnode_handle *endpoint; 1960 /* Only CSI2 is supported */ 1961 struct v4l2_fwnode_endpoint ep = { 1962 .bus_type = V4L2_MBUS_CSI2_DPHY 1963 }; 1964 int ret; 1965 1966 endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); 1967 if (!endpoint) { 1968 dev_err(dev, "Endpoint node not found\n"); 1969 return -EINVAL; 1970 } 1971 1972 ret = v4l2_fwnode_endpoint_parse(endpoint, &ep); 1973 fwnode_handle_put(endpoint); 1974 if (ret == -ENXIO) { 1975 dev_err(dev, "Unsupported bus type, should be CSI2\n"); 1976 return ret; 1977 } else if (ret) { 1978 dev_err(dev, "Parsing endpoint node failed %d\n", ret); 1979 return ret; 1980 } 1981 1982 /* Check number of data lanes, only 4 lanes supported */ 1983 if (ep.bus.mipi_csi2.num_data_lanes != 4) { 1984 dev_err(dev, "Invalid data lanes: %d\n", 1985 ep.bus.mipi_csi2.num_data_lanes); 1986 return -EINVAL; 1987 } 1988 1989 return 0; 1990 } 1991 1992 static int imx274_probe(struct i2c_client *client) 1993 { 1994 struct v4l2_subdev *sd; 1995 struct stimx274 *imx274; 1996 struct device *dev = &client->dev; 1997 int ret; 1998 1999 /* initialize imx274 */ 2000 imx274 = devm_kzalloc(dev, sizeof(*imx274), GFP_KERNEL); 2001 if (!imx274) 2002 return -ENOMEM; 2003 2004 mutex_init(&imx274->lock); 2005 2006 ret = imx274_fwnode_parse(dev); 2007 if (ret) 2008 return ret; 2009 2010 imx274->inck = devm_clk_get_optional(dev, "inck"); 2011 if (IS_ERR(imx274->inck)) 2012 return PTR_ERR(imx274->inck); 2013 2014 ret = imx274_regulators_get(dev, imx274); 2015 if (ret) { 2016 dev_err(dev, "Failed to get power regulators, err: %d\n", ret); 2017 return ret; 2018 } 2019 2020 /* initialize format */ 2021 imx274->mode = &imx274_modes[0]; 2022 imx274->crop.width = IMX274_MAX_WIDTH; 2023 imx274->crop.height = IMX274_MAX_HEIGHT; 2024 imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio; 2025 imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio; 2026 imx274->format.field = V4L2_FIELD_NONE; 2027 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; 2028 imx274->format.colorspace = V4L2_COLORSPACE_SRGB; 2029 imx274->frame_interval.numerator = 1; 2030 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 2031 2032 /* initialize regmap */ 2033 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); 2034 if (IS_ERR(imx274->regmap)) { 2035 dev_err(dev, 2036 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); 2037 ret = -ENODEV; 2038 goto err_regmap; 2039 } 2040 2041 /* initialize subdevice */ 2042 imx274->client = client; 2043 sd = &imx274->sd; 2044 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); 2045 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 2046 2047 /* initialize subdev media pad */ 2048 imx274->pad.flags = MEDIA_PAD_FL_SOURCE; 2049 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 2050 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); 2051 if (ret < 0) { 2052 dev_err(dev, 2053 "%s : media entity init Failed %d\n", __func__, ret); 2054 goto err_regmap; 2055 } 2056 2057 /* initialize sensor reset gpio */ 2058 imx274->reset_gpio = devm_gpiod_get_optional(dev, "reset", 2059 GPIOD_OUT_HIGH); 2060 if (IS_ERR(imx274->reset_gpio)) { 2061 ret = dev_err_probe(dev, PTR_ERR(imx274->reset_gpio), 2062 "Reset GPIO not setup in DT\n"); 2063 goto err_me; 2064 } 2065 2066 /* power on the sensor */ 2067 ret = imx274_power_on(dev); 2068 if (ret < 0) { 2069 dev_err(dev, "%s : imx274 power on failed\n", __func__); 2070 goto err_me; 2071 } 2072 2073 /* initialize controls */ 2074 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4); 2075 if (ret < 0) { 2076 dev_err(dev, "%s : ctrl handler init Failed\n", __func__); 2077 goto err_power_off; 2078 } 2079 2080 imx274->ctrls.handler.lock = &imx274->lock; 2081 2082 /* add new controls */ 2083 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( 2084 &imx274->ctrls.handler, &imx274_ctrl_ops, 2085 V4L2_CID_TEST_PATTERN, 2086 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); 2087 2088 imx274->ctrls.gain = v4l2_ctrl_new_std( 2089 &imx274->ctrls.handler, 2090 &imx274_ctrl_ops, 2091 V4L2_CID_GAIN, IMX274_MIN_GAIN, 2092 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, 2093 IMX274_DEF_GAIN); 2094 2095 imx274->ctrls.exposure = v4l2_ctrl_new_std( 2096 &imx274->ctrls.handler, 2097 &imx274_ctrl_ops, 2098 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 2099 1000000 / IMX274_DEF_FRAME_RATE, 1, 2100 IMX274_MIN_EXPOSURE_TIME); 2101 2102 imx274->ctrls.vflip = v4l2_ctrl_new_std( 2103 &imx274->ctrls.handler, 2104 &imx274_ctrl_ops, 2105 V4L2_CID_VFLIP, 0, 1, 1, 0); 2106 2107 imx274->sd.ctrl_handler = &imx274->ctrls.handler; 2108 if (imx274->ctrls.handler.error) { 2109 ret = imx274->ctrls.handler.error; 2110 goto err_ctrls; 2111 } 2112 2113 /* load default control values */ 2114 imx274_load_default(imx274); 2115 2116 /* register subdevice */ 2117 ret = v4l2_async_register_subdev(sd); 2118 if (ret < 0) { 2119 dev_err(dev, "%s : v4l2_async_register_subdev failed %d\n", 2120 __func__, ret); 2121 goto err_ctrls; 2122 } 2123 2124 pm_runtime_set_active(dev); 2125 pm_runtime_enable(dev); 2126 pm_runtime_idle(dev); 2127 2128 dev_info(dev, "imx274 : imx274 probe success !\n"); 2129 return 0; 2130 2131 err_ctrls: 2132 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 2133 err_power_off: 2134 imx274_power_off(dev); 2135 err_me: 2136 media_entity_cleanup(&sd->entity); 2137 err_regmap: 2138 mutex_destroy(&imx274->lock); 2139 return ret; 2140 } 2141 2142 static void imx274_remove(struct i2c_client *client) 2143 { 2144 struct v4l2_subdev *sd = i2c_get_clientdata(client); 2145 struct stimx274 *imx274 = to_imx274(sd); 2146 2147 pm_runtime_disable(&client->dev); 2148 if (!pm_runtime_status_suspended(&client->dev)) 2149 imx274_power_off(&client->dev); 2150 pm_runtime_set_suspended(&client->dev); 2151 2152 v4l2_async_unregister_subdev(sd); 2153 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 2154 2155 media_entity_cleanup(&sd->entity); 2156 mutex_destroy(&imx274->lock); 2157 } 2158 2159 static const struct dev_pm_ops imx274_pm_ops = { 2160 SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL) 2161 }; 2162 2163 static struct i2c_driver imx274_i2c_driver = { 2164 .driver = { 2165 .name = DRIVER_NAME, 2166 .pm = &imx274_pm_ops, 2167 .of_match_table = imx274_of_id_table, 2168 }, 2169 .probe = imx274_probe, 2170 .remove = imx274_remove, 2171 .id_table = imx274_id, 2172 }; 2173 2174 module_i2c_driver(imx274_i2c_driver); 2175 2176 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); 2177 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); 2178 MODULE_LICENSE("GPL v2"); 2179