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/regmap.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-subdev.h> 29 30 /* 31 * See "SHR, SVR Setting" in datasheet 32 */ 33 #define IMX274_DEFAULT_FRAME_LENGTH (4550) 34 #define IMX274_MAX_FRAME_LENGTH (0x000fffff) 35 36 /* 37 * See "Frame Rate Adjustment" in datasheet 38 */ 39 #define IMX274_PIXCLK_CONST1 (72000000) 40 #define IMX274_PIXCLK_CONST2 (1000000) 41 42 /* 43 * The input gain is shifted by IMX274_GAIN_SHIFT to get 44 * decimal number. The real gain is 45 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) 46 */ 47 #define IMX274_GAIN_SHIFT (8) 48 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) 49 50 /* 51 * See "Analog Gain" and "Digital Gain" in datasheet 52 * min gain is 1X 53 * max gain is calculated based on IMX274_GAIN_REG_MAX 54 */ 55 #define IMX274_GAIN_REG_MAX (1957) 56 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) 57 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ 58 / (2048 - IMX274_GAIN_REG_MAX)) 59 #define IMX274_MAX_DIGITAL_GAIN (8) 60 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) 61 #define IMX274_GAIN_CONST (2048) /* for gain formula */ 62 63 /* 64 * 1 line time in us = (HMAX / 72), minimal is 4 lines 65 */ 66 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) 67 68 #define IMX274_DEFAULT_BINNING IMX274_BINNING_OFF 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 /* 135 * imx274 I2C operation related structure 136 */ 137 struct reg_8 { 138 u16 addr; 139 u8 val; 140 }; 141 142 static const struct regmap_config imx274_regmap_config = { 143 .reg_bits = 16, 144 .val_bits = 8, 145 .cache_type = REGCACHE_RBTREE, 146 }; 147 148 enum imx274_binning { 149 IMX274_BINNING_OFF, 150 IMX274_BINNING_2_1, 151 IMX274_BINNING_3_1, 152 }; 153 154 /* 155 * Parameters for each imx274 readout mode. 156 * 157 * These are the values to configure the sensor in one of the 158 * implemented modes. 159 * 160 * @init_regs: registers to initialize the mode 161 * @bin_ratio: downscale factor (e.g. 3 for 3:1 binning) 162 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate 163 * Adjustment (CSI-2)" in the datasheet) 164 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the 165 * datasheet) 166 * @max_fps: Maximum frames per second 167 * @nocpiop: Number of clocks per internal offset period (see "Integration Time 168 * in Each Readout Drive Mode (CSI-2)" in the datasheet) 169 */ 170 struct imx274_mode { 171 const struct reg_8 *init_regs; 172 unsigned int bin_ratio; 173 int min_frame_len; 174 int min_SHR; 175 int max_fps; 176 int nocpiop; 177 }; 178 179 /* 180 * imx274 test pattern related structure 181 */ 182 enum { 183 TEST_PATTERN_DISABLED = 0, 184 TEST_PATTERN_ALL_000H, 185 TEST_PATTERN_ALL_FFFH, 186 TEST_PATTERN_ALL_555H, 187 TEST_PATTERN_ALL_AAAH, 188 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ 189 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ 190 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ 191 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ 192 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ 193 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ 194 TEST_PATTERN_H_COLOR_BARS, 195 TEST_PATTERN_V_COLOR_BARS, 196 }; 197 198 static const char * const tp_qmenu[] = { 199 "Disabled", 200 "All 000h Pattern", 201 "All FFFh Pattern", 202 "All 555h Pattern", 203 "All AAAh Pattern", 204 "Vertical Stripe (555h / AAAh)", 205 "Vertical Stripe (AAAh / 555h)", 206 "Vertical Stripe (000h / 555h)", 207 "Vertical Stripe (555h / 000h)", 208 "Vertical Stripe (000h / FFFh)", 209 "Vertical Stripe (FFFh / 000h)", 210 "Vertical Color Bars", 211 "Horizontal Color Bars", 212 }; 213 214 /* 215 * All-pixel scan mode (10-bit) 216 * imx274 mode1(refer to datasheet) register configuration with 217 * 3840x2160 resolution, raw10 data and mipi four lane output 218 */ 219 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { 220 {0x3004, 0x01}, 221 {0x3005, 0x01}, 222 {0x3006, 0x00}, 223 {0x3007, 0xa2}, 224 225 {0x3018, 0xA2}, /* output XVS, HVS */ 226 227 {0x306B, 0x05}, 228 {0x30E2, 0x01}, 229 230 {0x30EE, 0x01}, 231 {0x3342, 0x0A}, 232 {0x3343, 0x00}, 233 {0x3344, 0x16}, 234 {0x3345, 0x00}, 235 {0x33A6, 0x01}, 236 {0x3528, 0x0E}, 237 {0x3554, 0x1F}, 238 {0x3555, 0x01}, 239 {0x3556, 0x01}, 240 {0x3557, 0x01}, 241 {0x3558, 0x01}, 242 {0x3559, 0x00}, 243 {0x355A, 0x00}, 244 {0x35BA, 0x0E}, 245 {0x366A, 0x1B}, 246 {0x366B, 0x1A}, 247 {0x366C, 0x19}, 248 {0x366D, 0x17}, 249 {0x3A41, 0x08}, 250 251 {IMX274_TABLE_END, 0x00} 252 }; 253 254 /* 255 * Horizontal/vertical 2/2-line binning 256 * (Horizontal and vertical weightedbinning, 10-bit) 257 * imx274 mode3(refer to datasheet) register configuration with 258 * 1920x1080 resolution, raw10 data and mipi four lane output 259 */ 260 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { 261 {0x3004, 0x02}, 262 {0x3005, 0x21}, 263 {0x3006, 0x00}, 264 {0x3007, 0xb1}, 265 266 {0x3018, 0xA2}, /* output XVS, HVS */ 267 268 {0x306B, 0x05}, 269 {0x30E2, 0x02}, 270 271 {0x30EE, 0x01}, 272 {0x3342, 0x0A}, 273 {0x3343, 0x00}, 274 {0x3344, 0x1A}, 275 {0x3345, 0x00}, 276 {0x33A6, 0x01}, 277 {0x3528, 0x0E}, 278 {0x3554, 0x00}, 279 {0x3555, 0x01}, 280 {0x3556, 0x01}, 281 {0x3557, 0x01}, 282 {0x3558, 0x01}, 283 {0x3559, 0x00}, 284 {0x355A, 0x00}, 285 {0x35BA, 0x0E}, 286 {0x366A, 0x1B}, 287 {0x366B, 0x1A}, 288 {0x366C, 0x19}, 289 {0x366D, 0x17}, 290 {0x3A41, 0x08}, 291 292 {IMX274_TABLE_END, 0x00} 293 }; 294 295 /* 296 * Vertical 2/3 subsampling binning horizontal 3 binning 297 * imx274 mode5(refer to datasheet) register configuration with 298 * 1280x720 resolution, raw10 data and mipi four lane output 299 */ 300 static const struct reg_8 imx274_mode5_1280x720_raw10[] = { 301 {0x3004, 0x03}, 302 {0x3005, 0x31}, 303 {0x3006, 0x00}, 304 {0x3007, 0xa9}, 305 306 {0x3018, 0xA2}, /* output XVS, HVS */ 307 308 {0x306B, 0x05}, 309 {0x30E2, 0x03}, 310 311 {0x30EE, 0x01}, 312 {0x3342, 0x0A}, 313 {0x3343, 0x00}, 314 {0x3344, 0x1B}, 315 {0x3345, 0x00}, 316 {0x33A6, 0x01}, 317 {0x3528, 0x0E}, 318 {0x3554, 0x00}, 319 {0x3555, 0x01}, 320 {0x3556, 0x01}, 321 {0x3557, 0x01}, 322 {0x3558, 0x01}, 323 {0x3559, 0x00}, 324 {0x355A, 0x00}, 325 {0x35BA, 0x0E}, 326 {0x366A, 0x1B}, 327 {0x366B, 0x19}, 328 {0x366C, 0x17}, 329 {0x366D, 0x17}, 330 {0x3A41, 0x04}, 331 332 {IMX274_TABLE_END, 0x00} 333 }; 334 335 /* 336 * imx274 first step register configuration for 337 * starting stream 338 */ 339 static const struct reg_8 imx274_start_1[] = { 340 {IMX274_STANDBY_REG, 0x12}, 341 342 /* PLRD: clock settings */ 343 {0x3120, 0xF0}, 344 {0x3121, 0x00}, 345 {0x3122, 0x02}, 346 {0x3129, 0x9C}, 347 {0x312A, 0x02}, 348 {0x312D, 0x02}, 349 350 {0x310B, 0x00}, 351 352 /* PLSTMG */ 353 {0x304C, 0x00}, /* PLSTMG01 */ 354 {0x304D, 0x03}, 355 {0x331C, 0x1A}, 356 {0x331D, 0x00}, 357 {0x3502, 0x02}, 358 {0x3529, 0x0E}, 359 {0x352A, 0x0E}, 360 {0x352B, 0x0E}, 361 {0x3538, 0x0E}, 362 {0x3539, 0x0E}, 363 {0x3553, 0x00}, 364 {0x357D, 0x05}, 365 {0x357F, 0x05}, 366 {0x3581, 0x04}, 367 {0x3583, 0x76}, 368 {0x3587, 0x01}, 369 {0x35BB, 0x0E}, 370 {0x35BC, 0x0E}, 371 {0x35BD, 0x0E}, 372 {0x35BE, 0x0E}, 373 {0x35BF, 0x0E}, 374 {0x366E, 0x00}, 375 {0x366F, 0x00}, 376 {0x3670, 0x00}, 377 {0x3671, 0x00}, 378 379 /* PSMIPI */ 380 {0x3304, 0x32}, /* PSMIPI1 */ 381 {0x3305, 0x00}, 382 {0x3306, 0x32}, 383 {0x3307, 0x00}, 384 {0x3590, 0x32}, 385 {0x3591, 0x00}, 386 {0x3686, 0x32}, 387 {0x3687, 0x00}, 388 389 {IMX274_TABLE_END, 0x00} 390 }; 391 392 /* 393 * imx274 second step register configuration for 394 * starting stream 395 */ 396 static const struct reg_8 imx274_start_2[] = { 397 {IMX274_STANDBY_REG, 0x00}, 398 {0x303E, 0x02}, /* SYS_MODE = 2 */ 399 {IMX274_TABLE_END, 0x00} 400 }; 401 402 /* 403 * imx274 third step register configuration for 404 * starting stream 405 */ 406 static const struct reg_8 imx274_start_3[] = { 407 {0x30F4, 0x00}, 408 {0x3018, 0xA2}, /* XHS VHS OUTPUT */ 409 {IMX274_TABLE_END, 0x00} 410 }; 411 412 /* 413 * imx274 register configuration for stopping stream 414 */ 415 static const struct reg_8 imx274_stop[] = { 416 {IMX274_STANDBY_REG, 0x01}, 417 {IMX274_TABLE_END, 0x00} 418 }; 419 420 /* 421 * imx274 disable test pattern register configuration 422 */ 423 static const struct reg_8 imx274_tp_disabled[] = { 424 {0x303C, 0x00}, 425 {0x377F, 0x00}, 426 {0x3781, 0x00}, 427 {0x370B, 0x00}, 428 {IMX274_TABLE_END, 0x00} 429 }; 430 431 /* 432 * imx274 test pattern register configuration 433 * reg 0x303D defines the test pattern modes 434 */ 435 static const struct reg_8 imx274_tp_regs[] = { 436 {0x303C, 0x11}, 437 {0x370E, 0x01}, 438 {0x377F, 0x01}, 439 {0x3781, 0x01}, 440 {0x370B, 0x11}, 441 {IMX274_TABLE_END, 0x00} 442 }; 443 444 /* nocpiop happens to be the same number for the implemented modes */ 445 static const struct imx274_mode imx274_modes[] = { 446 { 447 /* mode 1, 4K */ 448 .bin_ratio = 1, 449 .init_regs = imx274_mode1_3840x2160_raw10, 450 .min_frame_len = 4550, 451 .min_SHR = 12, 452 .max_fps = 60, 453 .nocpiop = 112, 454 }, 455 { 456 /* mode 3, 1080p */ 457 .bin_ratio = 2, 458 .init_regs = imx274_mode3_1920x1080_raw10, 459 .min_frame_len = 2310, 460 .min_SHR = 8, 461 .max_fps = 120, 462 .nocpiop = 112, 463 }, 464 { 465 /* mode 5, 720p */ 466 .bin_ratio = 3, 467 .init_regs = imx274_mode5_1280x720_raw10, 468 .min_frame_len = 2310, 469 .min_SHR = 8, 470 .max_fps = 120, 471 .nocpiop = 112, 472 }, 473 }; 474 475 /* 476 * struct imx274_ctrls - imx274 ctrl structure 477 * @handler: V4L2 ctrl handler structure 478 * @exposure: Pointer to expsure ctrl structure 479 * @gain: Pointer to gain ctrl structure 480 * @vflip: Pointer to vflip ctrl structure 481 * @test_pattern: Pointer to test pattern ctrl structure 482 */ 483 struct imx274_ctrls { 484 struct v4l2_ctrl_handler handler; 485 struct v4l2_ctrl *exposure; 486 struct v4l2_ctrl *gain; 487 struct v4l2_ctrl *vflip; 488 struct v4l2_ctrl *test_pattern; 489 }; 490 491 /* 492 * struct stim274 - imx274 device structure 493 * @sd: V4L2 subdevice structure 494 * @pad: Media pad structure 495 * @client: Pointer to I2C client 496 * @ctrls: imx274 control structure 497 * @crop: rect to be captured 498 * @compose: compose rect, i.e. output resolution 499 * @format: V4L2 media bus frame format structure 500 * (width and height are in sync with the compose rect) 501 * @frame_rate: V4L2 frame rate structure 502 * @regmap: Pointer to regmap structure 503 * @reset_gpio: Pointer to reset gpio 504 * @lock: Mutex structure 505 * @mode: Parameters for the selected readout mode 506 */ 507 struct stimx274 { 508 struct v4l2_subdev sd; 509 struct media_pad pad; 510 struct i2c_client *client; 511 struct imx274_ctrls ctrls; 512 struct v4l2_rect crop; 513 struct v4l2_mbus_framefmt format; 514 struct v4l2_fract frame_interval; 515 struct regmap *regmap; 516 struct gpio_desc *reset_gpio; 517 struct mutex lock; /* mutex lock for operations */ 518 const struct imx274_mode *mode; 519 }; 520 521 #define IMX274_ROUND(dim, step, flags) \ 522 ((flags) & V4L2_SEL_FLAG_GE \ 523 ? roundup((dim), (step)) \ 524 : ((flags) & V4L2_SEL_FLAG_LE \ 525 ? rounddown((dim), (step)) \ 526 : rounddown((dim) + (step) / 2, (step)))) 527 528 /* 529 * Function declaration 530 */ 531 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); 532 static int imx274_set_exposure(struct stimx274 *priv, int val); 533 static int imx274_set_vflip(struct stimx274 *priv, int val); 534 static int imx274_set_test_pattern(struct stimx274 *priv, int val); 535 static int imx274_set_frame_interval(struct stimx274 *priv, 536 struct v4l2_fract frame_interval); 537 538 static inline void msleep_range(unsigned int delay_base) 539 { 540 usleep_range(delay_base * 1000, delay_base * 1000 + 500); 541 } 542 543 /* 544 * v4l2_ctrl and v4l2_subdev related operations 545 */ 546 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 547 { 548 return &container_of(ctrl->handler, 549 struct stimx274, ctrls.handler)->sd; 550 } 551 552 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) 553 { 554 return container_of(sd, struct stimx274, sd); 555 } 556 557 /* 558 * Writing a register table 559 * 560 * @priv: Pointer to device 561 * @table: Table containing register values (with optional delays) 562 * 563 * This is used to write register table into sensor's reg map. 564 * 565 * Return: 0 on success, errors otherwise 566 */ 567 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) 568 { 569 struct regmap *regmap = priv->regmap; 570 int err = 0; 571 const struct reg_8 *next; 572 u8 val; 573 574 int range_start = -1; 575 int range_count = 0; 576 u8 range_vals[16]; 577 int max_range_vals = ARRAY_SIZE(range_vals); 578 579 for (next = table;; next++) { 580 if ((next->addr != range_start + range_count) || 581 (next->addr == IMX274_TABLE_END) || 582 (next->addr == IMX274_TABLE_WAIT_MS) || 583 (range_count == max_range_vals)) { 584 if (range_count == 1) 585 err = regmap_write(regmap, 586 range_start, range_vals[0]); 587 else if (range_count > 1) 588 err = regmap_bulk_write(regmap, range_start, 589 &range_vals[0], 590 range_count); 591 else 592 err = 0; 593 594 if (err) 595 return err; 596 597 range_start = -1; 598 range_count = 0; 599 600 /* Handle special address values */ 601 if (next->addr == IMX274_TABLE_END) 602 break; 603 604 if (next->addr == IMX274_TABLE_WAIT_MS) { 605 msleep_range(next->val); 606 continue; 607 } 608 } 609 610 val = next->val; 611 612 if (range_start == -1) 613 range_start = next->addr; 614 615 range_vals[range_count++] = val; 616 } 617 return 0; 618 } 619 620 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) 621 { 622 int err; 623 624 err = regmap_write(priv->regmap, addr, val); 625 if (err) 626 dev_err(&priv->client->dev, 627 "%s : i2c write failed, %x = %x\n", __func__, 628 addr, val); 629 else 630 dev_dbg(&priv->client->dev, 631 "%s : addr 0x%x, val=0x%x\n", __func__, 632 addr, val); 633 return err; 634 } 635 636 /** 637 * Read a multibyte register. 638 * 639 * Uses a bulk read where possible. 640 * 641 * @priv: Pointer to device structure 642 * @addr: Address of the LSB register. Other registers must be 643 * consecutive, least-to-most significant. 644 * @val: Pointer to store the register value (cpu endianness) 645 * @nbytes: Number of bytes to read (range: [1..3]). 646 * Other bytes are zet to 0. 647 * 648 * Return: 0 on success, errors otherwise 649 */ 650 static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val, 651 size_t nbytes) 652 { 653 __le32 val_le = 0; 654 int err; 655 656 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes); 657 if (err) { 658 dev_err(&priv->client->dev, 659 "%s : i2c bulk read failed, %x (%zu bytes)\n", 660 __func__, addr, nbytes); 661 } else { 662 *val = le32_to_cpu(val_le); 663 dev_dbg(&priv->client->dev, 664 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 665 __func__, addr, *val, nbytes); 666 } 667 668 return err; 669 } 670 671 /** 672 * Write a multibyte register. 673 * 674 * Uses a bulk write where possible. 675 * 676 * @priv: Pointer to device structure 677 * @addr: Address of the LSB register. Other registers must be 678 * consecutive, least-to-most significant. 679 * @val: Value to be written to the register (cpu endianness) 680 * @nbytes: Number of bytes to write (range: [1..3]) 681 */ 682 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, 683 size_t nbytes) 684 { 685 __le32 val_le = cpu_to_le32(val); 686 int err; 687 688 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); 689 if (err) 690 dev_err(&priv->client->dev, 691 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", 692 __func__, addr, val, nbytes); 693 else 694 dev_dbg(&priv->client->dev, 695 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 696 __func__, addr, val, nbytes); 697 return err; 698 } 699 700 /* 701 * Set mode registers to start stream. 702 * @priv: Pointer to device structure 703 * 704 * Return: 0 on success, errors otherwise 705 */ 706 static int imx274_mode_regs(struct stimx274 *priv) 707 { 708 int err = 0; 709 710 err = imx274_write_table(priv, imx274_start_1); 711 if (err) 712 return err; 713 714 err = imx274_write_table(priv, priv->mode->init_regs); 715 716 return err; 717 } 718 719 /* 720 * imx274_start_stream - Function for starting stream per mode index 721 * @priv: Pointer to device structure 722 * 723 * Return: 0 on success, errors otherwise 724 */ 725 static int imx274_start_stream(struct stimx274 *priv) 726 { 727 int err = 0; 728 729 /* 730 * Refer to "Standby Cancel Sequence when using CSI-2" in 731 * imx274 datasheet, it should wait 10ms or more here. 732 * give it 1 extra ms for margin 733 */ 734 msleep_range(11); 735 err = imx274_write_table(priv, imx274_start_2); 736 if (err) 737 return err; 738 739 /* 740 * Refer to "Standby Cancel Sequence when using CSI-2" in 741 * imx274 datasheet, it should wait 7ms or more here. 742 * give it 1 extra ms for margin 743 */ 744 msleep_range(8); 745 err = imx274_write_table(priv, imx274_start_3); 746 if (err) 747 return err; 748 749 return 0; 750 } 751 752 /* 753 * imx274_reset - Function called to reset the sensor 754 * @priv: Pointer to device structure 755 * @rst: Input value for determining the sensor's end state after reset 756 * 757 * Set the senor in reset and then 758 * if rst = 0, keep it in reset; 759 * if rst = 1, bring it out of reset. 760 * 761 */ 762 static void imx274_reset(struct stimx274 *priv, int rst) 763 { 764 gpiod_set_value_cansleep(priv->reset_gpio, 0); 765 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 766 gpiod_set_value_cansleep(priv->reset_gpio, !!rst); 767 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 768 } 769 770 /** 771 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls 772 * @ctrl: V4L2 control to be set 773 * 774 * This function is used to set the V4L2 controls for the imx274 sensor. 775 * 776 * Return: 0 on success, errors otherwise 777 */ 778 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) 779 { 780 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 781 struct stimx274 *imx274 = to_imx274(sd); 782 int ret = -EINVAL; 783 784 dev_dbg(&imx274->client->dev, 785 "%s : s_ctrl: %s, value: %d\n", __func__, 786 ctrl->name, ctrl->val); 787 788 switch (ctrl->id) { 789 case V4L2_CID_EXPOSURE: 790 dev_dbg(&imx274->client->dev, 791 "%s : set V4L2_CID_EXPOSURE\n", __func__); 792 ret = imx274_set_exposure(imx274, ctrl->val); 793 break; 794 795 case V4L2_CID_GAIN: 796 dev_dbg(&imx274->client->dev, 797 "%s : set V4L2_CID_GAIN\n", __func__); 798 ret = imx274_set_gain(imx274, ctrl); 799 break; 800 801 case V4L2_CID_VFLIP: 802 dev_dbg(&imx274->client->dev, 803 "%s : set V4L2_CID_VFLIP\n", __func__); 804 ret = imx274_set_vflip(imx274, ctrl->val); 805 break; 806 807 case V4L2_CID_TEST_PATTERN: 808 dev_dbg(&imx274->client->dev, 809 "%s : set V4L2_CID_TEST_PATTERN\n", __func__); 810 ret = imx274_set_test_pattern(imx274, ctrl->val); 811 break; 812 } 813 814 return ret; 815 } 816 817 static int imx274_binning_goodness(struct stimx274 *imx274, 818 int w, int ask_w, 819 int h, int ask_h, u32 flags) 820 { 821 struct device *dev = &imx274->client->dev; 822 const int goodness = 100000; 823 int val = 0; 824 825 if (flags & V4L2_SEL_FLAG_GE) { 826 if (w < ask_w) 827 val -= goodness; 828 if (h < ask_h) 829 val -= goodness; 830 } 831 832 if (flags & V4L2_SEL_FLAG_LE) { 833 if (w > ask_w) 834 val -= goodness; 835 if (h > ask_h) 836 val -= goodness; 837 } 838 839 val -= abs(w - ask_w); 840 val -= abs(h - ask_h); 841 842 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", 843 __func__, ask_w, ask_h, w, h, val); 844 845 return val; 846 } 847 848 /** 849 * Helper function to change binning and set both compose and format. 850 * 851 * We have two entry points to change binning: set_fmt and 852 * set_selection(COMPOSE). Both have to compute the new output size 853 * and set it in both the compose rect and the frame format size. We 854 * also need to do the same things after setting cropping to restore 855 * 1:1 binning. 856 * 857 * This function contains the common code for these three cases, it 858 * has many arguments in order to accommodate the needs of all of 859 * them. 860 * 861 * Must be called with imx274->lock locked. 862 * 863 * @imx274: The device object 864 * @cfg: The pad config we are editing for TRY requests 865 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller 866 * @width: Input-output parameter: set to the desired width before 867 * the call, contains the chosen value after returning successfully 868 * @height: Input-output parameter for height (see @width) 869 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not 870 * available (when called from set_fmt) 871 */ 872 static int __imx274_change_compose(struct stimx274 *imx274, 873 struct v4l2_subdev_pad_config *cfg, 874 u32 which, 875 u32 *width, 876 u32 *height, 877 u32 flags) 878 { 879 struct device *dev = &imx274->client->dev; 880 const struct v4l2_rect *cur_crop; 881 struct v4l2_mbus_framefmt *tgt_fmt; 882 unsigned int i; 883 const struct imx274_mode *best_mode = &imx274_modes[0]; 884 int best_goodness = INT_MIN; 885 886 if (which == V4L2_SUBDEV_FORMAT_TRY) { 887 cur_crop = &cfg->try_crop; 888 tgt_fmt = &cfg->try_fmt; 889 } else { 890 cur_crop = &imx274->crop; 891 tgt_fmt = &imx274->format; 892 } 893 894 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) { 895 unsigned int ratio = imx274_modes[i].bin_ratio; 896 897 int goodness = imx274_binning_goodness( 898 imx274, 899 cur_crop->width / ratio, *width, 900 cur_crop->height / ratio, *height, 901 flags); 902 903 if (goodness >= best_goodness) { 904 best_goodness = goodness; 905 best_mode = &imx274_modes[i]; 906 } 907 } 908 909 *width = cur_crop->width / best_mode->bin_ratio; 910 *height = cur_crop->height / best_mode->bin_ratio; 911 912 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) 913 imx274->mode = best_mode; 914 915 dev_dbg(dev, "%s: selected %u:1 binning\n", 916 __func__, best_mode->bin_ratio); 917 918 tgt_fmt->width = *width; 919 tgt_fmt->height = *height; 920 tgt_fmt->field = V4L2_FIELD_NONE; 921 922 return 0; 923 } 924 925 /** 926 * imx274_get_fmt - Get the pad format 927 * @sd: Pointer to V4L2 Sub device structure 928 * @cfg: Pointer to sub device pad information structure 929 * @fmt: Pointer to pad level media bus format 930 * 931 * This function is used to get the pad format information. 932 * 933 * Return: 0 on success 934 */ 935 static int imx274_get_fmt(struct v4l2_subdev *sd, 936 struct v4l2_subdev_pad_config *cfg, 937 struct v4l2_subdev_format *fmt) 938 { 939 struct stimx274 *imx274 = to_imx274(sd); 940 941 mutex_lock(&imx274->lock); 942 fmt->format = imx274->format; 943 mutex_unlock(&imx274->lock); 944 return 0; 945 } 946 947 /** 948 * imx274_set_fmt - This is used to set the pad format 949 * @sd: Pointer to V4L2 Sub device structure 950 * @cfg: Pointer to sub device pad information structure 951 * @format: Pointer to pad level media bus format 952 * 953 * This function is used to set the pad format. 954 * 955 * Return: 0 on success 956 */ 957 static int imx274_set_fmt(struct v4l2_subdev *sd, 958 struct v4l2_subdev_pad_config *cfg, 959 struct v4l2_subdev_format *format) 960 { 961 struct v4l2_mbus_framefmt *fmt = &format->format; 962 struct stimx274 *imx274 = to_imx274(sd); 963 int err = 0; 964 965 mutex_lock(&imx274->lock); 966 967 err = __imx274_change_compose(imx274, cfg, format->which, 968 &fmt->width, &fmt->height, 0); 969 970 if (err) 971 goto out; 972 973 /* 974 * __imx274_change_compose already set width and height in the 975 * applicable format, but we need to keep all other format 976 * values, so do a full copy here 977 */ 978 fmt->field = V4L2_FIELD_NONE; 979 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 980 cfg->try_fmt = *fmt; 981 else 982 imx274->format = *fmt; 983 984 out: 985 mutex_unlock(&imx274->lock); 986 987 return err; 988 } 989 990 static int imx274_get_selection(struct v4l2_subdev *sd, 991 struct v4l2_subdev_pad_config *cfg, 992 struct v4l2_subdev_selection *sel) 993 { 994 struct stimx274 *imx274 = to_imx274(sd); 995 const struct v4l2_rect *src_crop; 996 const struct v4l2_mbus_framefmt *src_fmt; 997 int ret = 0; 998 999 if (sel->pad != 0) 1000 return -EINVAL; 1001 1002 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { 1003 sel->r.left = 0; 1004 sel->r.top = 0; 1005 sel->r.width = IMX274_MAX_WIDTH; 1006 sel->r.height = IMX274_MAX_HEIGHT; 1007 return 0; 1008 } 1009 1010 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1011 src_crop = &cfg->try_crop; 1012 src_fmt = &cfg->try_fmt; 1013 } else { 1014 src_crop = &imx274->crop; 1015 src_fmt = &imx274->format; 1016 } 1017 1018 mutex_lock(&imx274->lock); 1019 1020 switch (sel->target) { 1021 case V4L2_SEL_TGT_CROP: 1022 sel->r = *src_crop; 1023 break; 1024 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1025 sel->r.top = 0; 1026 sel->r.left = 0; 1027 sel->r.width = src_crop->width; 1028 sel->r.height = src_crop->height; 1029 break; 1030 case V4L2_SEL_TGT_COMPOSE: 1031 sel->r.top = 0; 1032 sel->r.left = 0; 1033 sel->r.width = src_fmt->width; 1034 sel->r.height = src_fmt->height; 1035 break; 1036 default: 1037 ret = -EINVAL; 1038 } 1039 1040 mutex_unlock(&imx274->lock); 1041 1042 return ret; 1043 } 1044 1045 static int imx274_set_selection_crop(struct stimx274 *imx274, 1046 struct v4l2_subdev_pad_config *cfg, 1047 struct v4l2_subdev_selection *sel) 1048 { 1049 struct v4l2_rect *tgt_crop; 1050 struct v4l2_rect new_crop; 1051 bool size_changed; 1052 1053 /* 1054 * h_step could be 12 or 24 depending on the binning. But we 1055 * won't know the binning until we choose the mode later in 1056 * __imx274_change_compose(). Thus let's be safe and use the 1057 * most conservative value in all cases. 1058 */ 1059 const u32 h_step = 24; 1060 1061 new_crop.width = min_t(u32, 1062 IMX274_ROUND(sel->r.width, h_step, sel->flags), 1063 IMX274_MAX_WIDTH); 1064 1065 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ 1066 if (new_crop.width < 144) 1067 new_crop.width = 144; 1068 1069 new_crop.left = min_t(u32, 1070 IMX274_ROUND(sel->r.left, h_step, 0), 1071 IMX274_MAX_WIDTH - new_crop.width); 1072 1073 new_crop.height = min_t(u32, 1074 IMX274_ROUND(sel->r.height, 2, sel->flags), 1075 IMX274_MAX_HEIGHT); 1076 1077 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), 1078 IMX274_MAX_HEIGHT - new_crop.height); 1079 1080 sel->r = new_crop; 1081 1082 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1083 tgt_crop = &cfg->try_crop; 1084 else 1085 tgt_crop = &imx274->crop; 1086 1087 mutex_lock(&imx274->lock); 1088 1089 size_changed = (new_crop.width != tgt_crop->width || 1090 new_crop.height != tgt_crop->height); 1091 1092 /* __imx274_change_compose needs the new size in *tgt_crop */ 1093 *tgt_crop = new_crop; 1094 1095 /* if crop size changed then reset the output image size */ 1096 if (size_changed) 1097 __imx274_change_compose(imx274, cfg, sel->which, 1098 &new_crop.width, &new_crop.height, 1099 sel->flags); 1100 1101 mutex_unlock(&imx274->lock); 1102 1103 return 0; 1104 } 1105 1106 static int imx274_set_selection(struct v4l2_subdev *sd, 1107 struct v4l2_subdev_pad_config *cfg, 1108 struct v4l2_subdev_selection *sel) 1109 { 1110 struct stimx274 *imx274 = to_imx274(sd); 1111 1112 if (sel->pad != 0) 1113 return -EINVAL; 1114 1115 if (sel->target == V4L2_SEL_TGT_CROP) 1116 return imx274_set_selection_crop(imx274, cfg, sel); 1117 1118 if (sel->target == V4L2_SEL_TGT_COMPOSE) { 1119 int err; 1120 1121 mutex_lock(&imx274->lock); 1122 err = __imx274_change_compose(imx274, cfg, sel->which, 1123 &sel->r.width, &sel->r.height, 1124 sel->flags); 1125 mutex_unlock(&imx274->lock); 1126 1127 /* 1128 * __imx274_change_compose already set width and 1129 * height in set->r, we still need to set top-left 1130 */ 1131 if (!err) { 1132 sel->r.top = 0; 1133 sel->r.left = 0; 1134 } 1135 1136 return err; 1137 } 1138 1139 return -EINVAL; 1140 } 1141 1142 static int imx274_apply_trimming(struct stimx274 *imx274) 1143 { 1144 u32 h_start; 1145 u32 h_end; 1146 u32 hmax; 1147 u32 v_cut; 1148 s32 v_pos; 1149 u32 write_v_size; 1150 u32 y_out_size; 1151 int err; 1152 1153 h_start = imx274->crop.left + 12; 1154 h_end = h_start + imx274->crop.width; 1155 1156 /* Use the minimum allowed value of HMAX */ 1157 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ 1158 /* Note: 260 is the minimum HMAX in all implemented modes */ 1159 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); 1160 1161 /* invert v_pos if VFLIP */ 1162 v_pos = imx274->ctrls.vflip->cur.val ? 1163 (-imx274->crop.top / 2) : (imx274->crop.top / 2); 1164 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; 1165 write_v_size = imx274->crop.height + 22; 1166 y_out_size = imx274->crop.height + 14; 1167 1168 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); 1169 if (!err) 1170 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); 1171 if (!err) 1172 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, 1173 h_start, 2); 1174 if (!err) 1175 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, 1176 h_end, 2); 1177 if (!err) 1178 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); 1179 if (!err) 1180 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, 1181 v_cut, 2); 1182 if (!err) 1183 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, 1184 v_pos, 2); 1185 if (!err) 1186 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, 1187 write_v_size, 2); 1188 if (!err) 1189 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, 1190 y_out_size, 2); 1191 1192 return err; 1193 } 1194 1195 /** 1196 * imx274_g_frame_interval - Get the frame interval 1197 * @sd: Pointer to V4L2 Sub device structure 1198 * @fi: Pointer to V4l2 Sub device frame interval structure 1199 * 1200 * This function is used to get the frame interval. 1201 * 1202 * Return: 0 on success 1203 */ 1204 static int imx274_g_frame_interval(struct v4l2_subdev *sd, 1205 struct v4l2_subdev_frame_interval *fi) 1206 { 1207 struct stimx274 *imx274 = to_imx274(sd); 1208 1209 fi->interval = imx274->frame_interval; 1210 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", 1211 __func__, imx274->frame_interval.numerator, 1212 imx274->frame_interval.denominator); 1213 1214 return 0; 1215 } 1216 1217 /** 1218 * imx274_s_frame_interval - Set the frame interval 1219 * @sd: Pointer to V4L2 Sub device structure 1220 * @fi: Pointer to V4l2 Sub device frame interval structure 1221 * 1222 * This function is used to set the frame intervavl. 1223 * 1224 * Return: 0 on success 1225 */ 1226 static int imx274_s_frame_interval(struct v4l2_subdev *sd, 1227 struct v4l2_subdev_frame_interval *fi) 1228 { 1229 struct stimx274 *imx274 = to_imx274(sd); 1230 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; 1231 int min, max, def; 1232 int ret; 1233 1234 mutex_lock(&imx274->lock); 1235 ret = imx274_set_frame_interval(imx274, fi->interval); 1236 1237 if (!ret) { 1238 /* 1239 * exposure time range is decided by frame interval 1240 * need to update it after frame interval changes 1241 */ 1242 min = IMX274_MIN_EXPOSURE_TIME; 1243 max = fi->interval.numerator * 1000000 1244 / fi->interval.denominator; 1245 def = max; 1246 if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) { 1247 dev_err(&imx274->client->dev, 1248 "Exposure ctrl range update failed\n"); 1249 goto unlock; 1250 } 1251 1252 /* update exposure time accordingly */ 1253 imx274_set_exposure(imx274, ctrl->val); 1254 1255 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", 1256 fi->interval.numerator * 1000000 1257 / fi->interval.denominator); 1258 } 1259 1260 unlock: 1261 mutex_unlock(&imx274->lock); 1262 1263 return ret; 1264 } 1265 1266 /** 1267 * imx274_load_default - load default control values 1268 * @priv: Pointer to device structure 1269 * 1270 * Return: 0 on success, errors otherwise 1271 */ 1272 static int imx274_load_default(struct stimx274 *priv) 1273 { 1274 int ret; 1275 1276 /* load default control values */ 1277 priv->frame_interval.numerator = 1; 1278 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1279 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; 1280 priv->ctrls.gain->val = IMX274_DEF_GAIN; 1281 priv->ctrls.vflip->val = 0; 1282 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; 1283 1284 /* update frame rate */ 1285 ret = imx274_set_frame_interval(priv, 1286 priv->frame_interval); 1287 if (ret) 1288 return ret; 1289 1290 /* update exposure time */ 1291 ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val); 1292 if (ret) 1293 return ret; 1294 1295 /* update gain */ 1296 ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val); 1297 if (ret) 1298 return ret; 1299 1300 /* update vflip */ 1301 ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val); 1302 if (ret) 1303 return ret; 1304 1305 return 0; 1306 } 1307 1308 /** 1309 * imx274_s_stream - It is used to start/stop the streaming. 1310 * @sd: V4L2 Sub device 1311 * @on: Flag (True / False) 1312 * 1313 * This function controls the start or stop of streaming for the 1314 * imx274 sensor. 1315 * 1316 * Return: 0 on success, errors otherwise 1317 */ 1318 static int imx274_s_stream(struct v4l2_subdev *sd, int on) 1319 { 1320 struct stimx274 *imx274 = to_imx274(sd); 1321 int ret = 0; 1322 1323 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, 1324 on ? "Stream Start" : "Stream Stop", 1325 imx274->mode - &imx274_modes[0]); 1326 1327 mutex_lock(&imx274->lock); 1328 1329 if (on) { 1330 /* load mode registers */ 1331 ret = imx274_mode_regs(imx274); 1332 if (ret) 1333 goto fail; 1334 1335 ret = imx274_apply_trimming(imx274); 1336 if (ret) 1337 goto fail; 1338 1339 /* 1340 * update frame rate & expsoure. if the last mode is different, 1341 * HMAX could be changed. As the result, frame rate & exposure 1342 * are changed. 1343 * gain is not affected. 1344 */ 1345 ret = imx274_set_frame_interval(imx274, 1346 imx274->frame_interval); 1347 if (ret) 1348 goto fail; 1349 1350 /* update exposure time */ 1351 ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure, 1352 imx274->ctrls.exposure->val); 1353 if (ret) 1354 goto fail; 1355 1356 /* start stream */ 1357 ret = imx274_start_stream(imx274); 1358 if (ret) 1359 goto fail; 1360 } else { 1361 /* stop stream */ 1362 ret = imx274_write_table(imx274, imx274_stop); 1363 if (ret) 1364 goto fail; 1365 } 1366 1367 mutex_unlock(&imx274->lock); 1368 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); 1369 return 0; 1370 1371 fail: 1372 mutex_unlock(&imx274->lock); 1373 dev_err(&imx274->client->dev, "s_stream failed\n"); 1374 return ret; 1375 } 1376 1377 /* 1378 * imx274_get_frame_length - Function for obtaining current frame length 1379 * @priv: Pointer to device structure 1380 * @val: Pointer to obainted value 1381 * 1382 * frame_length = vmax x (svr + 1), in unit of hmax. 1383 * 1384 * Return: 0 on success 1385 */ 1386 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) 1387 { 1388 int err; 1389 u32 svr; 1390 u32 vmax; 1391 1392 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1393 if (err) 1394 goto fail; 1395 1396 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3); 1397 if (err) 1398 goto fail; 1399 1400 *val = vmax * (svr + 1); 1401 1402 return 0; 1403 1404 fail: 1405 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1406 return err; 1407 } 1408 1409 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, 1410 u32 *frame_length) 1411 { 1412 int err; 1413 1414 err = imx274_get_frame_length(priv, frame_length); 1415 if (err) 1416 return err; 1417 1418 if (*frame_length < priv->mode->min_frame_len) 1419 *frame_length = priv->mode->min_frame_len; 1420 1421 *val = *frame_length - *val; /* convert to raw shr */ 1422 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) 1423 *val = *frame_length - IMX274_SHR_LIMIT_CONST; 1424 else if (*val < priv->mode->min_SHR) 1425 *val = priv->mode->min_SHR; 1426 1427 return 0; 1428 } 1429 1430 /* 1431 * imx274_set_digital gain - Function called when setting digital gain 1432 * @priv: Pointer to device structure 1433 * @dgain: Value of digital gain. 1434 * 1435 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x 1436 * 1437 * Return: 0 on success 1438 */ 1439 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) 1440 { 1441 u8 reg_val; 1442 1443 reg_val = ffs(dgain); 1444 1445 if (reg_val) 1446 reg_val--; 1447 1448 reg_val = clamp(reg_val, (u8)0, (u8)3); 1449 1450 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, 1451 reg_val & IMX274_MASK_LSB_4_BITS); 1452 } 1453 1454 /* 1455 * imx274_set_gain - Function called when setting gain 1456 * @priv: Pointer to device structure 1457 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; 1458 * @ctrl: v4l2 control pointer 1459 * 1460 * Set the gain based on input value. 1461 * The caller should hold the mutex lock imx274->lock if necessary 1462 * 1463 * Return: 0 on success 1464 */ 1465 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) 1466 { 1467 int err; 1468 u32 gain, analog_gain, digital_gain, gain_reg; 1469 1470 gain = (u32)(ctrl->val); 1471 1472 dev_dbg(&priv->client->dev, 1473 "%s : input gain = %d.%d\n", __func__, 1474 gain >> IMX274_GAIN_SHIFT, 1475 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); 1476 1477 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) 1478 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; 1479 else if (gain < IMX274_MIN_GAIN) 1480 gain = IMX274_MIN_GAIN; 1481 1482 if (gain <= IMX274_MAX_ANALOG_GAIN) 1483 digital_gain = 1; 1484 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) 1485 digital_gain = 2; 1486 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) 1487 digital_gain = 4; 1488 else 1489 digital_gain = IMX274_MAX_DIGITAL_GAIN; 1490 1491 analog_gain = gain / digital_gain; 1492 1493 dev_dbg(&priv->client->dev, 1494 "%s : digital gain = %d, analog gain = %d.%d\n", 1495 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, 1496 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) 1497 >> IMX274_GAIN_SHIFT); 1498 1499 err = imx274_set_digital_gain(priv, digital_gain); 1500 if (err) 1501 goto fail; 1502 1503 /* convert to register value, refer to imx274 datasheet */ 1504 gain_reg = (u32)IMX274_GAIN_CONST - 1505 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; 1506 if (gain_reg > IMX274_GAIN_REG_MAX) 1507 gain_reg = IMX274_GAIN_REG_MAX; 1508 1509 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 1510 2); 1511 if (err) 1512 goto fail; 1513 1514 if (IMX274_GAIN_CONST - gain_reg == 0) { 1515 err = -EINVAL; 1516 goto fail; 1517 } 1518 1519 /* convert register value back to gain value */ 1520 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) 1521 / (IMX274_GAIN_CONST - gain_reg) * digital_gain; 1522 1523 dev_dbg(&priv->client->dev, 1524 "%s : GAIN control success, gain_reg = %d, new gain = %d\n", 1525 __func__, gain_reg, ctrl->val); 1526 1527 return 0; 1528 1529 fail: 1530 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1531 return err; 1532 } 1533 1534 /* 1535 * imx274_set_coarse_time - Function called when setting SHR value 1536 * @priv: Pointer to device structure 1537 * @val: Value for exposure time in number of line_length, or [HMAX] 1538 * 1539 * Set SHR value based on input value. 1540 * 1541 * Return: 0 on success 1542 */ 1543 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) 1544 { 1545 int err; 1546 u32 coarse_time, frame_length; 1547 1548 coarse_time = *val; 1549 1550 /* convert exposure_time to appropriate SHR value */ 1551 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); 1552 if (err) 1553 goto fail; 1554 1555 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); 1556 if (err) 1557 goto fail; 1558 1559 *val = frame_length - coarse_time; 1560 return 0; 1561 1562 fail: 1563 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1564 return err; 1565 } 1566 1567 /* 1568 * imx274_set_exposure - Function called when setting exposure time 1569 * @priv: Pointer to device structure 1570 * @val: Variable for exposure time, in the unit of micro-second 1571 * 1572 * Set exposure time based on input value. 1573 * The caller should hold the mutex lock imx274->lock if necessary 1574 * 1575 * Return: 0 on success 1576 */ 1577 static int imx274_set_exposure(struct stimx274 *priv, int val) 1578 { 1579 int err; 1580 u32 hmax; 1581 u32 coarse_time; /* exposure time in unit of line (HMAX)*/ 1582 1583 dev_dbg(&priv->client->dev, 1584 "%s : EXPOSURE control input = %d\n", __func__, val); 1585 1586 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ 1587 1588 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1589 if (err) 1590 goto fail; 1591 1592 if (hmax == 0) { 1593 err = -EINVAL; 1594 goto fail; 1595 } 1596 1597 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val 1598 - priv->mode->nocpiop) / hmax; 1599 1600 /* step 2: convert exposure_time into SHR value */ 1601 1602 /* set SHR */ 1603 err = imx274_set_coarse_time(priv, &coarse_time); 1604 if (err) 1605 goto fail; 1606 1607 priv->ctrls.exposure->val = 1608 (coarse_time * hmax + priv->mode->nocpiop) 1609 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); 1610 1611 dev_dbg(&priv->client->dev, 1612 "%s : EXPOSURE control success\n", __func__); 1613 return 0; 1614 1615 fail: 1616 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1617 1618 return err; 1619 } 1620 1621 /* 1622 * imx274_set_vflip - Function called when setting vertical flip 1623 * @priv: Pointer to device structure 1624 * @val: Value for vflip setting 1625 * 1626 * Set vertical flip based on input value. 1627 * val = 0: normal, no vertical flip 1628 * val = 1: vertical flip enabled 1629 * The caller should hold the mutex lock imx274->lock if necessary 1630 * 1631 * Return: 0 on success 1632 */ 1633 static int imx274_set_vflip(struct stimx274 *priv, int val) 1634 { 1635 int err; 1636 1637 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); 1638 if (err) { 1639 dev_err(&priv->client->dev, "VFLIP control error\n"); 1640 return err; 1641 } 1642 1643 dev_dbg(&priv->client->dev, 1644 "%s : VFLIP control success\n", __func__); 1645 1646 return 0; 1647 } 1648 1649 /* 1650 * imx274_set_test_pattern - Function called when setting test pattern 1651 * @priv: Pointer to device structure 1652 * @val: Variable for test pattern 1653 * 1654 * Set to different test patterns based on input value. 1655 * 1656 * Return: 0 on success 1657 */ 1658 static int imx274_set_test_pattern(struct stimx274 *priv, int val) 1659 { 1660 int err = 0; 1661 1662 if (val == TEST_PATTERN_DISABLED) { 1663 err = imx274_write_table(priv, imx274_tp_disabled); 1664 } else if (val <= TEST_PATTERN_V_COLOR_BARS) { 1665 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); 1666 if (!err) 1667 err = imx274_write_table(priv, imx274_tp_regs); 1668 } else { 1669 err = -EINVAL; 1670 } 1671 1672 if (!err) 1673 dev_dbg(&priv->client->dev, 1674 "%s : TEST PATTERN control success\n", __func__); 1675 else 1676 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1677 1678 return err; 1679 } 1680 1681 /* 1682 * imx274_set_frame_length - Function called when setting frame length 1683 * @priv: Pointer to device structure 1684 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) 1685 * 1686 * Set frame length based on input value. 1687 * 1688 * Return: 0 on success 1689 */ 1690 static int imx274_set_frame_length(struct stimx274 *priv, u32 val) 1691 { 1692 int err; 1693 u32 frame_length; 1694 1695 dev_dbg(&priv->client->dev, "%s : input length = %d\n", 1696 __func__, val); 1697 1698 frame_length = (u32)val; 1699 1700 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); 1701 if (err) 1702 goto fail; 1703 1704 return 0; 1705 1706 fail: 1707 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1708 return err; 1709 } 1710 1711 /* 1712 * imx274_set_frame_interval - Function called when setting frame interval 1713 * @priv: Pointer to device structure 1714 * @frame_interval: Variable for frame interval 1715 * 1716 * Change frame interval by updating VMAX value 1717 * The caller should hold the mutex lock imx274->lock if necessary 1718 * 1719 * Return: 0 on success 1720 */ 1721 static int imx274_set_frame_interval(struct stimx274 *priv, 1722 struct v4l2_fract frame_interval) 1723 { 1724 int err; 1725 u32 frame_length, req_frame_rate; 1726 u32 svr; 1727 u32 hmax; 1728 1729 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", 1730 __func__, frame_interval.numerator, 1731 frame_interval.denominator); 1732 1733 if (frame_interval.numerator == 0) { 1734 err = -EINVAL; 1735 goto fail; 1736 } 1737 1738 req_frame_rate = (u32)(frame_interval.denominator 1739 / frame_interval.numerator); 1740 1741 /* boundary check */ 1742 if (req_frame_rate > priv->mode->max_fps) { 1743 frame_interval.numerator = 1; 1744 frame_interval.denominator = priv->mode->max_fps; 1745 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { 1746 frame_interval.numerator = 1; 1747 frame_interval.denominator = IMX274_MIN_FRAME_RATE; 1748 } 1749 1750 /* 1751 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX 1752 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX 1753 */ 1754 1755 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1756 if (err) 1757 goto fail; 1758 1759 dev_dbg(&priv->client->dev, 1760 "%s : register SVR = %d\n", __func__, svr); 1761 1762 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1763 if (err) 1764 goto fail; 1765 1766 dev_dbg(&priv->client->dev, 1767 "%s : register HMAX = %d\n", __func__, hmax); 1768 1769 if (hmax == 0 || frame_interval.denominator == 0) { 1770 err = -EINVAL; 1771 goto fail; 1772 } 1773 1774 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax 1775 * frame_interval.numerator 1776 / frame_interval.denominator; 1777 1778 err = imx274_set_frame_length(priv, frame_length); 1779 if (err) 1780 goto fail; 1781 1782 priv->frame_interval = frame_interval; 1783 return 0; 1784 1785 fail: 1786 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1787 return err; 1788 } 1789 1790 static const struct v4l2_subdev_pad_ops imx274_pad_ops = { 1791 .get_fmt = imx274_get_fmt, 1792 .set_fmt = imx274_set_fmt, 1793 .get_selection = imx274_get_selection, 1794 .set_selection = imx274_set_selection, 1795 }; 1796 1797 static const struct v4l2_subdev_video_ops imx274_video_ops = { 1798 .g_frame_interval = imx274_g_frame_interval, 1799 .s_frame_interval = imx274_s_frame_interval, 1800 .s_stream = imx274_s_stream, 1801 }; 1802 1803 static const struct v4l2_subdev_ops imx274_subdev_ops = { 1804 .pad = &imx274_pad_ops, 1805 .video = &imx274_video_ops, 1806 }; 1807 1808 static const struct v4l2_ctrl_ops imx274_ctrl_ops = { 1809 .s_ctrl = imx274_s_ctrl, 1810 }; 1811 1812 static const struct of_device_id imx274_of_id_table[] = { 1813 { .compatible = "sony,imx274" }, 1814 { } 1815 }; 1816 MODULE_DEVICE_TABLE(of, imx274_of_id_table); 1817 1818 static const struct i2c_device_id imx274_id[] = { 1819 { "IMX274", 0 }, 1820 { } 1821 }; 1822 MODULE_DEVICE_TABLE(i2c, imx274_id); 1823 1824 static int imx274_probe(struct i2c_client *client) 1825 { 1826 struct v4l2_subdev *sd; 1827 struct stimx274 *imx274; 1828 int ret; 1829 1830 /* initialize imx274 */ 1831 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL); 1832 if (!imx274) 1833 return -ENOMEM; 1834 1835 mutex_init(&imx274->lock); 1836 1837 /* initialize format */ 1838 imx274->mode = &imx274_modes[IMX274_DEFAULT_BINNING]; 1839 imx274->crop.width = IMX274_MAX_WIDTH; 1840 imx274->crop.height = IMX274_MAX_HEIGHT; 1841 imx274->format.width = imx274->crop.width / imx274->mode->bin_ratio; 1842 imx274->format.height = imx274->crop.height / imx274->mode->bin_ratio; 1843 imx274->format.field = V4L2_FIELD_NONE; 1844 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; 1845 imx274->format.colorspace = V4L2_COLORSPACE_SRGB; 1846 imx274->frame_interval.numerator = 1; 1847 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1848 1849 /* initialize regmap */ 1850 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); 1851 if (IS_ERR(imx274->regmap)) { 1852 dev_err(&client->dev, 1853 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); 1854 ret = -ENODEV; 1855 goto err_regmap; 1856 } 1857 1858 /* initialize subdevice */ 1859 imx274->client = client; 1860 sd = &imx274->sd; 1861 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); 1862 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1863 1864 /* initialize subdev media pad */ 1865 imx274->pad.flags = MEDIA_PAD_FL_SOURCE; 1866 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1867 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); 1868 if (ret < 0) { 1869 dev_err(&client->dev, 1870 "%s : media entity init Failed %d\n", __func__, ret); 1871 goto err_regmap; 1872 } 1873 1874 /* initialize sensor reset gpio */ 1875 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 1876 GPIOD_OUT_HIGH); 1877 if (IS_ERR(imx274->reset_gpio)) { 1878 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) 1879 dev_err(&client->dev, "Reset GPIO not setup in DT"); 1880 ret = PTR_ERR(imx274->reset_gpio); 1881 goto err_me; 1882 } 1883 1884 /* pull sensor out of reset */ 1885 imx274_reset(imx274, 1); 1886 1887 /* initialize controls */ 1888 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4); 1889 if (ret < 0) { 1890 dev_err(&client->dev, 1891 "%s : ctrl handler init Failed\n", __func__); 1892 goto err_me; 1893 } 1894 1895 imx274->ctrls.handler.lock = &imx274->lock; 1896 1897 /* add new controls */ 1898 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( 1899 &imx274->ctrls.handler, &imx274_ctrl_ops, 1900 V4L2_CID_TEST_PATTERN, 1901 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); 1902 1903 imx274->ctrls.gain = v4l2_ctrl_new_std( 1904 &imx274->ctrls.handler, 1905 &imx274_ctrl_ops, 1906 V4L2_CID_GAIN, IMX274_MIN_GAIN, 1907 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, 1908 IMX274_DEF_GAIN); 1909 1910 imx274->ctrls.exposure = v4l2_ctrl_new_std( 1911 &imx274->ctrls.handler, 1912 &imx274_ctrl_ops, 1913 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 1914 1000000 / IMX274_DEF_FRAME_RATE, 1, 1915 IMX274_MIN_EXPOSURE_TIME); 1916 1917 imx274->ctrls.vflip = v4l2_ctrl_new_std( 1918 &imx274->ctrls.handler, 1919 &imx274_ctrl_ops, 1920 V4L2_CID_VFLIP, 0, 1, 1, 0); 1921 1922 imx274->sd.ctrl_handler = &imx274->ctrls.handler; 1923 if (imx274->ctrls.handler.error) { 1924 ret = imx274->ctrls.handler.error; 1925 goto err_ctrls; 1926 } 1927 1928 /* setup default controls */ 1929 ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler); 1930 if (ret) { 1931 dev_err(&client->dev, 1932 "Error %d setup default controls\n", ret); 1933 goto err_ctrls; 1934 } 1935 1936 /* load default control values */ 1937 ret = imx274_load_default(imx274); 1938 if (ret) { 1939 dev_err(&client->dev, 1940 "%s : imx274_load_default failed %d\n", 1941 __func__, ret); 1942 goto err_ctrls; 1943 } 1944 1945 /* register subdevice */ 1946 ret = v4l2_async_register_subdev(sd); 1947 if (ret < 0) { 1948 dev_err(&client->dev, 1949 "%s : v4l2_async_register_subdev failed %d\n", 1950 __func__, ret); 1951 goto err_ctrls; 1952 } 1953 1954 dev_info(&client->dev, "imx274 : imx274 probe success !\n"); 1955 return 0; 1956 1957 err_ctrls: 1958 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 1959 err_me: 1960 media_entity_cleanup(&sd->entity); 1961 err_regmap: 1962 mutex_destroy(&imx274->lock); 1963 return ret; 1964 } 1965 1966 static int imx274_remove(struct i2c_client *client) 1967 { 1968 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1969 struct stimx274 *imx274 = to_imx274(sd); 1970 1971 /* stop stream */ 1972 imx274_write_table(imx274, imx274_stop); 1973 1974 v4l2_async_unregister_subdev(sd); 1975 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 1976 media_entity_cleanup(&sd->entity); 1977 mutex_destroy(&imx274->lock); 1978 return 0; 1979 } 1980 1981 static struct i2c_driver imx274_i2c_driver = { 1982 .driver = { 1983 .name = DRIVER_NAME, 1984 .of_match_table = imx274_of_id_table, 1985 }, 1986 .probe_new = imx274_probe, 1987 .remove = imx274_remove, 1988 .id_table = imx274_id, 1989 }; 1990 1991 module_i2c_driver(imx274_i2c_driver); 1992 1993 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); 1994 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); 1995 MODULE_LICENSE("GPL v2"); 1996