1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019 Intel Corporation. 3 4 #include <asm/unaligned.h> 5 #include <linux/acpi.h> 6 #include <linux/delay.h> 7 #include <linux/i2c.h> 8 #include <linux/module.h> 9 #include <linux/pm_runtime.h> 10 #include <media/v4l2-ctrls.h> 11 #include <media/v4l2-device.h> 12 #include <media/v4l2-fwnode.h> 13 14 #define OV5675_REG_VALUE_08BIT 1 15 #define OV5675_REG_VALUE_16BIT 2 16 #define OV5675_REG_VALUE_24BIT 3 17 18 #define OV5675_LINK_FREQ_450MHZ 450000000ULL 19 #define OV5675_SCLK 90000000LL 20 #define OV5675_MCLK 19200000 21 #define OV5675_DATA_LANES 2 22 #define OV5675_RGB_DEPTH 10 23 24 #define OV5675_REG_CHIP_ID 0x300a 25 #define OV5675_CHIP_ID 0x5675 26 27 #define OV5675_REG_MODE_SELECT 0x0100 28 #define OV5675_MODE_STANDBY 0x00 29 #define OV5675_MODE_STREAMING 0x01 30 31 /* vertical-timings from sensor */ 32 #define OV5675_REG_VTS 0x380e 33 #define OV5675_VTS_30FPS 0x07e4 34 #define OV5675_VTS_30FPS_MIN 0x07e4 35 #define OV5675_VTS_MAX 0x7fff 36 37 /* horizontal-timings from sensor */ 38 #define OV5675_REG_HTS 0x380c 39 40 /* Exposure controls from sensor */ 41 #define OV5675_REG_EXPOSURE 0x3500 42 #define OV5675_EXPOSURE_MIN 4 43 #define OV5675_EXPOSURE_MAX_MARGIN 4 44 #define OV5675_EXPOSURE_STEP 1 45 46 /* Analog gain controls from sensor */ 47 #define OV5675_REG_ANALOG_GAIN 0x3508 48 #define OV5675_ANAL_GAIN_MIN 128 49 #define OV5675_ANAL_GAIN_MAX 2047 50 #define OV5675_ANAL_GAIN_STEP 1 51 52 /* Digital gain controls from sensor */ 53 #define OV5675_REG_MWB_R_GAIN 0x5019 54 #define OV5675_REG_MWB_G_GAIN 0x501b 55 #define OV5675_REG_MWB_B_GAIN 0x501d 56 #define OV5675_DGTL_GAIN_MIN 0 57 #define OV5675_DGTL_GAIN_MAX 4095 58 #define OV5675_DGTL_GAIN_STEP 1 59 #define OV5675_DGTL_GAIN_DEFAULT 1024 60 61 /* Test Pattern Control */ 62 #define OV5675_REG_TEST_PATTERN 0x4503 63 #define OV5675_TEST_PATTERN_ENABLE BIT(7) 64 #define OV5675_TEST_PATTERN_BAR_SHIFT 2 65 66 #define to_ov5675(_sd) container_of(_sd, struct ov5675, sd) 67 68 enum { 69 OV5675_LINK_FREQ_900MBPS, 70 }; 71 72 struct ov5675_reg { 73 u16 address; 74 u8 val; 75 }; 76 77 struct ov5675_reg_list { 78 u32 num_of_regs; 79 const struct ov5675_reg *regs; 80 }; 81 82 struct ov5675_link_freq_config { 83 const struct ov5675_reg_list reg_list; 84 }; 85 86 struct ov5675_mode { 87 /* Frame width in pixels */ 88 u32 width; 89 90 /* Frame height in pixels */ 91 u32 height; 92 93 /* Horizontal timining size */ 94 u32 hts; 95 96 /* Default vertical timining size */ 97 u32 vts_def; 98 99 /* Min vertical timining size */ 100 u32 vts_min; 101 102 /* Link frequency needed for this resolution */ 103 u32 link_freq_index; 104 105 /* Sensor register settings for this resolution */ 106 const struct ov5675_reg_list reg_list; 107 }; 108 109 static const struct ov5675_reg mipi_data_rate_900mbps[] = { 110 {0x0103, 0x01}, 111 {0x0100, 0x00}, 112 {0x0300, 0x04}, 113 {0x0302, 0x8d}, 114 {0x0303, 0x00}, 115 {0x030d, 0x26}, 116 }; 117 118 static const struct ov5675_reg mode_2592x1944_regs[] = { 119 {0x3002, 0x21}, 120 {0x3107, 0x23}, 121 {0x3501, 0x20}, 122 {0x3503, 0x0c}, 123 {0x3508, 0x03}, 124 {0x3509, 0x00}, 125 {0x3600, 0x66}, 126 {0x3602, 0x30}, 127 {0x3610, 0xa5}, 128 {0x3612, 0x93}, 129 {0x3620, 0x80}, 130 {0x3642, 0x0e}, 131 {0x3661, 0x00}, 132 {0x3662, 0x10}, 133 {0x3664, 0xf3}, 134 {0x3665, 0x9e}, 135 {0x3667, 0xa5}, 136 {0x366e, 0x55}, 137 {0x366f, 0x55}, 138 {0x3670, 0x11}, 139 {0x3671, 0x11}, 140 {0x3672, 0x11}, 141 {0x3673, 0x11}, 142 {0x3714, 0x24}, 143 {0x371a, 0x3e}, 144 {0x3733, 0x10}, 145 {0x3734, 0x00}, 146 {0x373d, 0x24}, 147 {0x3764, 0x20}, 148 {0x3765, 0x20}, 149 {0x3766, 0x12}, 150 {0x37a1, 0x14}, 151 {0x37a8, 0x1c}, 152 {0x37ab, 0x0f}, 153 {0x37c2, 0x04}, 154 {0x37cb, 0x00}, 155 {0x37cc, 0x00}, 156 {0x37cd, 0x00}, 157 {0x37ce, 0x00}, 158 {0x37d8, 0x02}, 159 {0x37d9, 0x08}, 160 {0x37dc, 0x04}, 161 {0x3800, 0x00}, 162 {0x3801, 0x00}, 163 {0x3802, 0x00}, 164 {0x3803, 0x04}, 165 {0x3804, 0x0a}, 166 {0x3805, 0x3f}, 167 {0x3806, 0x07}, 168 {0x3807, 0xb3}, 169 {0x3808, 0x0a}, 170 {0x3809, 0x20}, 171 {0x380a, 0x07}, 172 {0x380b, 0x98}, 173 {0x380c, 0x02}, 174 {0x380d, 0xee}, 175 {0x380e, 0x07}, 176 {0x380f, 0xe4}, 177 {0x3811, 0x10}, 178 {0x3813, 0x0d}, 179 {0x3814, 0x01}, 180 {0x3815, 0x01}, 181 {0x3816, 0x01}, 182 {0x3817, 0x01}, 183 {0x381e, 0x02}, 184 {0x3820, 0x88}, 185 {0x3821, 0x01}, 186 {0x3832, 0x04}, 187 {0x3c80, 0x01}, 188 {0x3c82, 0x00}, 189 {0x3c83, 0xc8}, 190 {0x3c8c, 0x0f}, 191 {0x3c8d, 0xa0}, 192 {0x3c90, 0x07}, 193 {0x3c91, 0x00}, 194 {0x3c92, 0x00}, 195 {0x3c93, 0x00}, 196 {0x3c94, 0xd0}, 197 {0x3c95, 0x50}, 198 {0x3c96, 0x35}, 199 {0x3c97, 0x00}, 200 {0x4001, 0xe0}, 201 {0x4008, 0x02}, 202 {0x4009, 0x0d}, 203 {0x400f, 0x80}, 204 {0x4013, 0x02}, 205 {0x4040, 0x00}, 206 {0x4041, 0x07}, 207 {0x404c, 0x50}, 208 {0x404e, 0x20}, 209 {0x4500, 0x06}, 210 {0x4503, 0x00}, 211 {0x450a, 0x04}, 212 {0x4809, 0x04}, 213 {0x480c, 0x12}, 214 {0x4819, 0x70}, 215 {0x4825, 0x32}, 216 {0x4826, 0x32}, 217 {0x482a, 0x06}, 218 {0x4833, 0x08}, 219 {0x4837, 0x0d}, 220 {0x5000, 0x77}, 221 {0x5b00, 0x01}, 222 {0x5b01, 0x10}, 223 {0x5b02, 0x01}, 224 {0x5b03, 0xdb}, 225 {0x5b05, 0x6c}, 226 {0x5e10, 0xfc}, 227 {0x3500, 0x00}, 228 {0x3501, 0x3E}, 229 {0x3502, 0x60}, 230 {0x3503, 0x08}, 231 {0x3508, 0x04}, 232 {0x3509, 0x00}, 233 {0x3832, 0x48}, 234 {0x5780, 0x3e}, 235 {0x5781, 0x0f}, 236 {0x5782, 0x44}, 237 {0x5783, 0x02}, 238 {0x5784, 0x01}, 239 {0x5785, 0x01}, 240 {0x5786, 0x00}, 241 {0x5787, 0x04}, 242 {0x5788, 0x02}, 243 {0x5789, 0x0f}, 244 {0x578a, 0xfd}, 245 {0x578b, 0xf5}, 246 {0x578c, 0xf5}, 247 {0x578d, 0x03}, 248 {0x578e, 0x08}, 249 {0x578f, 0x0c}, 250 {0x5790, 0x08}, 251 {0x5791, 0x06}, 252 {0x5792, 0x00}, 253 {0x5793, 0x52}, 254 {0x5794, 0xa3}, 255 {0x4003, 0x40}, 256 {0x3107, 0x01}, 257 {0x3c80, 0x08}, 258 {0x3c83, 0xb1}, 259 {0x3c8c, 0x10}, 260 {0x3c8d, 0x00}, 261 {0x3c90, 0x00}, 262 {0x3c94, 0x00}, 263 {0x3c95, 0x00}, 264 {0x3c96, 0x00}, 265 {0x37cb, 0x09}, 266 {0x37cc, 0x15}, 267 {0x37cd, 0x1f}, 268 {0x37ce, 0x1f}, 269 }; 270 271 static const struct ov5675_reg mode_1296x972_regs[] = { 272 {0x3002, 0x21}, 273 {0x3107, 0x23}, 274 {0x3501, 0x20}, 275 {0x3503, 0x0c}, 276 {0x3508, 0x03}, 277 {0x3509, 0x00}, 278 {0x3600, 0x66}, 279 {0x3602, 0x30}, 280 {0x3610, 0xa5}, 281 {0x3612, 0x93}, 282 {0x3620, 0x80}, 283 {0x3642, 0x0e}, 284 {0x3661, 0x00}, 285 {0x3662, 0x08}, 286 {0x3664, 0xf3}, 287 {0x3665, 0x9e}, 288 {0x3667, 0xa5}, 289 {0x366e, 0x55}, 290 {0x366f, 0x55}, 291 {0x3670, 0x11}, 292 {0x3671, 0x11}, 293 {0x3672, 0x11}, 294 {0x3673, 0x11}, 295 {0x3714, 0x28}, 296 {0x371a, 0x3e}, 297 {0x3733, 0x10}, 298 {0x3734, 0x00}, 299 {0x373d, 0x24}, 300 {0x3764, 0x20}, 301 {0x3765, 0x20}, 302 {0x3766, 0x12}, 303 {0x37a1, 0x14}, 304 {0x37a8, 0x1c}, 305 {0x37ab, 0x0f}, 306 {0x37c2, 0x14}, 307 {0x37cb, 0x00}, 308 {0x37cc, 0x00}, 309 {0x37cd, 0x00}, 310 {0x37ce, 0x00}, 311 {0x37d8, 0x02}, 312 {0x37d9, 0x04}, 313 {0x37dc, 0x04}, 314 {0x3800, 0x00}, 315 {0x3801, 0x00}, 316 {0x3802, 0x00}, 317 {0x3803, 0xf4}, 318 {0x3804, 0x0a}, 319 {0x3805, 0x3f}, 320 {0x3806, 0x06}, 321 {0x3807, 0xb3}, 322 {0x3808, 0x05}, 323 {0x3809, 0x00}, 324 {0x380a, 0x02}, 325 {0x380b, 0xd0}, 326 {0x380c, 0x02}, 327 {0x380d, 0xee}, 328 {0x380e, 0x07}, 329 {0x380f, 0xe4}, 330 {0x3811, 0x10}, 331 {0x3813, 0x09}, 332 {0x3814, 0x03}, 333 {0x3815, 0x01}, 334 {0x3816, 0x03}, 335 {0x3817, 0x01}, 336 {0x381e, 0x02}, 337 {0x3820, 0x8b}, 338 {0x3821, 0x01}, 339 {0x3832, 0x04}, 340 {0x3c80, 0x01}, 341 {0x3c82, 0x00}, 342 {0x3c83, 0xc8}, 343 {0x3c8c, 0x0f}, 344 {0x3c8d, 0xa0}, 345 {0x3c90, 0x07}, 346 {0x3c91, 0x00}, 347 {0x3c92, 0x00}, 348 {0x3c93, 0x00}, 349 {0x3c94, 0xd0}, 350 {0x3c95, 0x50}, 351 {0x3c96, 0x35}, 352 {0x3c97, 0x00}, 353 {0x4001, 0xe0}, 354 {0x4008, 0x00}, 355 {0x4009, 0x07}, 356 {0x400f, 0x80}, 357 {0x4013, 0x02}, 358 {0x4040, 0x00}, 359 {0x4041, 0x03}, 360 {0x404c, 0x50}, 361 {0x404e, 0x20}, 362 {0x4500, 0x06}, 363 {0x4503, 0x00}, 364 {0x450a, 0x04}, 365 {0x4809, 0x04}, 366 {0x480c, 0x12}, 367 {0x4819, 0x70}, 368 {0x4825, 0x32}, 369 {0x4826, 0x32}, 370 {0x482a, 0x06}, 371 {0x4833, 0x08}, 372 {0x4837, 0x0d}, 373 {0x5000, 0x77}, 374 {0x5b00, 0x01}, 375 {0x5b01, 0x10}, 376 {0x5b02, 0x01}, 377 {0x5b03, 0xdb}, 378 {0x5b05, 0x6c}, 379 {0x5e10, 0xfc}, 380 {0x3500, 0x00}, 381 {0x3501, 0x1F}, 382 {0x3502, 0x20}, 383 {0x3503, 0x08}, 384 {0x3508, 0x04}, 385 {0x3509, 0x00}, 386 {0x3832, 0x48}, 387 {0x5780, 0x3e}, 388 {0x5781, 0x0f}, 389 {0x5782, 0x44}, 390 {0x5783, 0x02}, 391 {0x5784, 0x01}, 392 {0x5785, 0x01}, 393 {0x5786, 0x00}, 394 {0x5787, 0x04}, 395 {0x5788, 0x02}, 396 {0x5789, 0x0f}, 397 {0x578a, 0xfd}, 398 {0x578b, 0xf5}, 399 {0x578c, 0xf5}, 400 {0x578d, 0x03}, 401 {0x578e, 0x08}, 402 {0x578f, 0x0c}, 403 {0x5790, 0x08}, 404 {0x5791, 0x06}, 405 {0x5792, 0x00}, 406 {0x5793, 0x52}, 407 {0x5794, 0xa3}, 408 {0x4003, 0x40}, 409 {0x3107, 0x01}, 410 {0x3c80, 0x08}, 411 {0x3c83, 0xb1}, 412 {0x3c8c, 0x10}, 413 {0x3c8d, 0x00}, 414 {0x3c90, 0x00}, 415 {0x3c94, 0x00}, 416 {0x3c95, 0x00}, 417 {0x3c96, 0x00}, 418 {0x37cb, 0x09}, 419 {0x37cc, 0x15}, 420 {0x37cd, 0x1f}, 421 {0x37ce, 0x1f}, 422 }; 423 424 static const char * const ov5675_test_pattern_menu[] = { 425 "Disabled", 426 "Standard Color Bar", 427 "Top-Bottom Darker Color Bar", 428 "Right-Left Darker Color Bar", 429 "Bottom-Top Darker Color Bar" 430 }; 431 432 static const s64 link_freq_menu_items[] = { 433 OV5675_LINK_FREQ_450MHZ, 434 }; 435 436 static const struct ov5675_link_freq_config link_freq_configs[] = { 437 [OV5675_LINK_FREQ_900MBPS] = { 438 .reg_list = { 439 .num_of_regs = ARRAY_SIZE(mipi_data_rate_900mbps), 440 .regs = mipi_data_rate_900mbps, 441 } 442 } 443 }; 444 445 static const struct ov5675_mode supported_modes[] = { 446 { 447 .width = 2592, 448 .height = 1944, 449 .hts = 1500, 450 .vts_def = OV5675_VTS_30FPS, 451 .vts_min = OV5675_VTS_30FPS_MIN, 452 .reg_list = { 453 .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs), 454 .regs = mode_2592x1944_regs, 455 }, 456 .link_freq_index = OV5675_LINK_FREQ_900MBPS, 457 }, 458 { 459 .width = 1296, 460 .height = 972, 461 .hts = 1500, 462 .vts_def = OV5675_VTS_30FPS, 463 .vts_min = OV5675_VTS_30FPS_MIN, 464 .reg_list = { 465 .num_of_regs = ARRAY_SIZE(mode_1296x972_regs), 466 .regs = mode_1296x972_regs, 467 }, 468 .link_freq_index = OV5675_LINK_FREQ_900MBPS, 469 } 470 }; 471 472 struct ov5675 { 473 struct v4l2_subdev sd; 474 struct media_pad pad; 475 struct v4l2_ctrl_handler ctrl_handler; 476 477 /* V4L2 Controls */ 478 struct v4l2_ctrl *link_freq; 479 struct v4l2_ctrl *pixel_rate; 480 struct v4l2_ctrl *vblank; 481 struct v4l2_ctrl *hblank; 482 struct v4l2_ctrl *exposure; 483 484 /* Current mode */ 485 const struct ov5675_mode *cur_mode; 486 487 /* To serialize asynchronus callbacks */ 488 struct mutex mutex; 489 490 /* Streaming on/off */ 491 bool streaming; 492 }; 493 494 static u64 to_pixel_rate(u32 f_index) 495 { 496 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV5675_DATA_LANES; 497 498 do_div(pixel_rate, OV5675_RGB_DEPTH); 499 500 return pixel_rate; 501 } 502 503 static u64 to_pixels_per_line(u32 hts, u32 f_index) 504 { 505 u64 ppl = hts * to_pixel_rate(f_index); 506 507 do_div(ppl, OV5675_SCLK); 508 509 return ppl; 510 } 511 512 static int ov5675_read_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 *val) 513 { 514 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 515 struct i2c_msg msgs[2]; 516 u8 addr_buf[2]; 517 u8 data_buf[4] = {0}; 518 int ret; 519 520 if (len > 4) 521 return -EINVAL; 522 523 put_unaligned_be16(reg, addr_buf); 524 msgs[0].addr = client->addr; 525 msgs[0].flags = 0; 526 msgs[0].len = sizeof(addr_buf); 527 msgs[0].buf = addr_buf; 528 msgs[1].addr = client->addr; 529 msgs[1].flags = I2C_M_RD; 530 msgs[1].len = len; 531 msgs[1].buf = &data_buf[4 - len]; 532 533 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 534 if (ret != ARRAY_SIZE(msgs)) 535 return -EIO; 536 537 *val = get_unaligned_be32(data_buf); 538 539 return 0; 540 } 541 542 static int ov5675_write_reg(struct ov5675 *ov5675, u16 reg, u16 len, u32 val) 543 { 544 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 545 u8 buf[6]; 546 547 if (len > 4) 548 return -EINVAL; 549 550 put_unaligned_be16(reg, buf); 551 put_unaligned_be32(val << 8 * (4 - len), buf + 2); 552 if (i2c_master_send(client, buf, len + 2) != len + 2) 553 return -EIO; 554 555 return 0; 556 } 557 558 static int ov5675_write_reg_list(struct ov5675 *ov5675, 559 const struct ov5675_reg_list *r_list) 560 { 561 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 562 unsigned int i; 563 int ret; 564 565 for (i = 0; i < r_list->num_of_regs; i++) { 566 ret = ov5675_write_reg(ov5675, r_list->regs[i].address, 1, 567 r_list->regs[i].val); 568 if (ret) { 569 dev_err_ratelimited(&client->dev, 570 "failed to write reg 0x%4.4x. error = %d", 571 r_list->regs[i].address, ret); 572 return ret; 573 } 574 } 575 576 return 0; 577 } 578 579 static int ov5675_update_digital_gain(struct ov5675 *ov5675, u32 d_gain) 580 { 581 int ret; 582 583 ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_R_GAIN, 584 OV5675_REG_VALUE_16BIT, d_gain); 585 if (ret) 586 return ret; 587 588 ret = ov5675_write_reg(ov5675, OV5675_REG_MWB_G_GAIN, 589 OV5675_REG_VALUE_16BIT, d_gain); 590 if (ret) 591 return ret; 592 593 return ov5675_write_reg(ov5675, OV5675_REG_MWB_B_GAIN, 594 OV5675_REG_VALUE_16BIT, d_gain); 595 } 596 597 static int ov5675_test_pattern(struct ov5675 *ov5675, u32 pattern) 598 { 599 if (pattern) 600 pattern = (pattern - 1) << OV5675_TEST_PATTERN_BAR_SHIFT | 601 OV5675_TEST_PATTERN_ENABLE; 602 603 return ov5675_write_reg(ov5675, OV5675_REG_TEST_PATTERN, 604 OV5675_REG_VALUE_08BIT, pattern); 605 } 606 607 static int ov5675_set_ctrl(struct v4l2_ctrl *ctrl) 608 { 609 struct ov5675 *ov5675 = container_of(ctrl->handler, 610 struct ov5675, ctrl_handler); 611 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 612 s64 exposure_max; 613 int ret = 0; 614 615 /* Propagate change of current control to all related controls */ 616 if (ctrl->id == V4L2_CID_VBLANK) { 617 /* Update max exposure while meeting expected vblanking */ 618 exposure_max = (ov5675->cur_mode->height + ctrl->val - 619 OV5675_EXPOSURE_MAX_MARGIN) / 2; 620 __v4l2_ctrl_modify_range(ov5675->exposure, 621 ov5675->exposure->minimum, 622 exposure_max, ov5675->exposure->step, 623 exposure_max); 624 } 625 626 /* V4L2 controls values will be applied only when power is already up */ 627 if (!pm_runtime_get_if_in_use(&client->dev)) 628 return 0; 629 630 switch (ctrl->id) { 631 case V4L2_CID_ANALOGUE_GAIN: 632 ret = ov5675_write_reg(ov5675, OV5675_REG_ANALOG_GAIN, 633 OV5675_REG_VALUE_16BIT, ctrl->val); 634 break; 635 636 case V4L2_CID_DIGITAL_GAIN: 637 ret = ov5675_update_digital_gain(ov5675, ctrl->val); 638 break; 639 640 case V4L2_CID_EXPOSURE: 641 /* 3 least significant bits of expsoure are fractional part */ 642 ret = ov5675_write_reg(ov5675, OV5675_REG_EXPOSURE, 643 OV5675_REG_VALUE_24BIT, ctrl->val << 3); 644 break; 645 646 case V4L2_CID_VBLANK: 647 ret = ov5675_write_reg(ov5675, OV5675_REG_VTS, 648 OV5675_REG_VALUE_16BIT, 649 ov5675->cur_mode->height + ctrl->val + 650 10); 651 break; 652 653 case V4L2_CID_TEST_PATTERN: 654 ret = ov5675_test_pattern(ov5675, ctrl->val); 655 break; 656 657 default: 658 ret = -EINVAL; 659 break; 660 } 661 662 pm_runtime_put(&client->dev); 663 664 return ret; 665 } 666 667 static const struct v4l2_ctrl_ops ov5675_ctrl_ops = { 668 .s_ctrl = ov5675_set_ctrl, 669 }; 670 671 static int ov5675_init_controls(struct ov5675 *ov5675) 672 { 673 struct v4l2_ctrl_handler *ctrl_hdlr; 674 s64 exposure_max, h_blank; 675 int ret; 676 677 ctrl_hdlr = &ov5675->ctrl_handler; 678 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); 679 if (ret) 680 return ret; 681 682 ctrl_hdlr->lock = &ov5675->mutex; 683 ov5675->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov5675_ctrl_ops, 684 V4L2_CID_LINK_FREQ, 685 ARRAY_SIZE(link_freq_menu_items) - 1, 686 0, link_freq_menu_items); 687 if (ov5675->link_freq) 688 ov5675->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 689 690 ov5675->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, 691 V4L2_CID_PIXEL_RATE, 0, 692 to_pixel_rate(OV5675_LINK_FREQ_900MBPS), 693 1, 694 to_pixel_rate(OV5675_LINK_FREQ_900MBPS)); 695 ov5675->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, 696 V4L2_CID_VBLANK, 697 ov5675->cur_mode->vts_min - ov5675->cur_mode->height, 698 OV5675_VTS_MAX - ov5675->cur_mode->height, 1, 699 ov5675->cur_mode->vts_def - ov5675->cur_mode->height); 700 h_blank = to_pixels_per_line(ov5675->cur_mode->hts, 701 ov5675->cur_mode->link_freq_index) - ov5675->cur_mode->width; 702 ov5675->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, 703 V4L2_CID_HBLANK, h_blank, h_blank, 1, 704 h_blank); 705 if (ov5675->hblank) 706 ov5675->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; 707 708 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, 709 OV5675_ANAL_GAIN_MIN, OV5675_ANAL_GAIN_MAX, 710 OV5675_ANAL_GAIN_STEP, OV5675_ANAL_GAIN_MIN); 711 v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, V4L2_CID_DIGITAL_GAIN, 712 OV5675_DGTL_GAIN_MIN, OV5675_DGTL_GAIN_MAX, 713 OV5675_DGTL_GAIN_STEP, OV5675_DGTL_GAIN_DEFAULT); 714 exposure_max = (ov5675->cur_mode->vts_def - 715 OV5675_EXPOSURE_MAX_MARGIN) / 2; 716 ov5675->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov5675_ctrl_ops, 717 V4L2_CID_EXPOSURE, 718 OV5675_EXPOSURE_MIN, exposure_max, 719 OV5675_EXPOSURE_STEP, 720 exposure_max); 721 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov5675_ctrl_ops, 722 V4L2_CID_TEST_PATTERN, 723 ARRAY_SIZE(ov5675_test_pattern_menu) - 1, 724 0, 0, ov5675_test_pattern_menu); 725 if (ctrl_hdlr->error) 726 return ctrl_hdlr->error; 727 728 ov5675->sd.ctrl_handler = ctrl_hdlr; 729 730 return 0; 731 } 732 733 static void ov5675_update_pad_format(const struct ov5675_mode *mode, 734 struct v4l2_mbus_framefmt *fmt) 735 { 736 fmt->width = mode->width; 737 fmt->height = mode->height; 738 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 739 fmt->field = V4L2_FIELD_NONE; 740 } 741 742 static int ov5675_start_streaming(struct ov5675 *ov5675) 743 { 744 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 745 const struct ov5675_reg_list *reg_list; 746 int link_freq_index, ret; 747 748 link_freq_index = ov5675->cur_mode->link_freq_index; 749 reg_list = &link_freq_configs[link_freq_index].reg_list; 750 ret = ov5675_write_reg_list(ov5675, reg_list); 751 if (ret) { 752 dev_err(&client->dev, "failed to set plls"); 753 return ret; 754 } 755 756 reg_list = &ov5675->cur_mode->reg_list; 757 ret = ov5675_write_reg_list(ov5675, reg_list); 758 if (ret) { 759 dev_err(&client->dev, "failed to set mode"); 760 return ret; 761 } 762 763 ret = __v4l2_ctrl_handler_setup(ov5675->sd.ctrl_handler); 764 if (ret) 765 return ret; 766 767 ret = ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT, 768 OV5675_REG_VALUE_08BIT, OV5675_MODE_STREAMING); 769 if (ret) { 770 dev_err(&client->dev, "failed to set stream"); 771 return ret; 772 } 773 774 return 0; 775 } 776 777 static void ov5675_stop_streaming(struct ov5675 *ov5675) 778 { 779 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 780 781 if (ov5675_write_reg(ov5675, OV5675_REG_MODE_SELECT, 782 OV5675_REG_VALUE_08BIT, OV5675_MODE_STANDBY)) 783 dev_err(&client->dev, "failed to set stream"); 784 } 785 786 static int ov5675_set_stream(struct v4l2_subdev *sd, int enable) 787 { 788 struct ov5675 *ov5675 = to_ov5675(sd); 789 struct i2c_client *client = v4l2_get_subdevdata(sd); 790 int ret = 0; 791 792 if (ov5675->streaming == enable) 793 return 0; 794 795 mutex_lock(&ov5675->mutex); 796 if (enable) { 797 ret = pm_runtime_get_sync(&client->dev); 798 if (ret < 0) { 799 pm_runtime_put_noidle(&client->dev); 800 mutex_unlock(&ov5675->mutex); 801 return ret; 802 } 803 804 ret = ov5675_start_streaming(ov5675); 805 if (ret) { 806 enable = 0; 807 ov5675_stop_streaming(ov5675); 808 pm_runtime_put(&client->dev); 809 } 810 } else { 811 ov5675_stop_streaming(ov5675); 812 pm_runtime_put(&client->dev); 813 } 814 815 ov5675->streaming = enable; 816 mutex_unlock(&ov5675->mutex); 817 818 return ret; 819 } 820 821 static int __maybe_unused ov5675_suspend(struct device *dev) 822 { 823 struct i2c_client *client = to_i2c_client(dev); 824 struct v4l2_subdev *sd = i2c_get_clientdata(client); 825 struct ov5675 *ov5675 = to_ov5675(sd); 826 827 mutex_lock(&ov5675->mutex); 828 if (ov5675->streaming) 829 ov5675_stop_streaming(ov5675); 830 831 mutex_unlock(&ov5675->mutex); 832 833 return 0; 834 } 835 836 static int __maybe_unused ov5675_resume(struct device *dev) 837 { 838 struct i2c_client *client = to_i2c_client(dev); 839 struct v4l2_subdev *sd = i2c_get_clientdata(client); 840 struct ov5675 *ov5675 = to_ov5675(sd); 841 int ret; 842 843 mutex_lock(&ov5675->mutex); 844 if (ov5675->streaming) { 845 ret = ov5675_start_streaming(ov5675); 846 if (ret) { 847 ov5675->streaming = false; 848 ov5675_stop_streaming(ov5675); 849 mutex_unlock(&ov5675->mutex); 850 return ret; 851 } 852 } 853 854 mutex_unlock(&ov5675->mutex); 855 856 return 0; 857 } 858 859 static int ov5675_set_format(struct v4l2_subdev *sd, 860 struct v4l2_subdev_pad_config *cfg, 861 struct v4l2_subdev_format *fmt) 862 { 863 struct ov5675 *ov5675 = to_ov5675(sd); 864 const struct ov5675_mode *mode; 865 s32 vblank_def, h_blank; 866 867 mode = v4l2_find_nearest_size(supported_modes, 868 ARRAY_SIZE(supported_modes), width, 869 height, fmt->format.width, 870 fmt->format.height); 871 872 mutex_lock(&ov5675->mutex); 873 ov5675_update_pad_format(mode, &fmt->format); 874 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 875 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; 876 } else { 877 ov5675->cur_mode = mode; 878 __v4l2_ctrl_s_ctrl(ov5675->link_freq, mode->link_freq_index); 879 __v4l2_ctrl_s_ctrl_int64(ov5675->pixel_rate, 880 to_pixel_rate(mode->link_freq_index)); 881 882 /* Update limits and set FPS to default */ 883 vblank_def = mode->vts_def - mode->height; 884 __v4l2_ctrl_modify_range(ov5675->vblank, 885 mode->vts_min - mode->height, 886 OV5675_VTS_MAX - mode->height, 1, 887 vblank_def); 888 __v4l2_ctrl_s_ctrl(ov5675->vblank, vblank_def); 889 h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) - 890 mode->width; 891 __v4l2_ctrl_modify_range(ov5675->hblank, h_blank, h_blank, 1, 892 h_blank); 893 } 894 895 mutex_unlock(&ov5675->mutex); 896 897 return 0; 898 } 899 900 static int ov5675_get_format(struct v4l2_subdev *sd, 901 struct v4l2_subdev_pad_config *cfg, 902 struct v4l2_subdev_format *fmt) 903 { 904 struct ov5675 *ov5675 = to_ov5675(sd); 905 906 mutex_lock(&ov5675->mutex); 907 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) 908 fmt->format = *v4l2_subdev_get_try_format(&ov5675->sd, cfg, 909 fmt->pad); 910 else 911 ov5675_update_pad_format(ov5675->cur_mode, &fmt->format); 912 913 mutex_unlock(&ov5675->mutex); 914 915 return 0; 916 } 917 918 static int ov5675_enum_mbus_code(struct v4l2_subdev *sd, 919 struct v4l2_subdev_pad_config *cfg, 920 struct v4l2_subdev_mbus_code_enum *code) 921 { 922 if (code->index > 0) 923 return -EINVAL; 924 925 code->code = MEDIA_BUS_FMT_SGRBG10_1X10; 926 927 return 0; 928 } 929 930 static int ov5675_enum_frame_size(struct v4l2_subdev *sd, 931 struct v4l2_subdev_pad_config *cfg, 932 struct v4l2_subdev_frame_size_enum *fse) 933 { 934 if (fse->index >= ARRAY_SIZE(supported_modes)) 935 return -EINVAL; 936 937 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) 938 return -EINVAL; 939 940 fse->min_width = supported_modes[fse->index].width; 941 fse->max_width = fse->min_width; 942 fse->min_height = supported_modes[fse->index].height; 943 fse->max_height = fse->min_height; 944 945 return 0; 946 } 947 948 static int ov5675_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 949 { 950 struct ov5675 *ov5675 = to_ov5675(sd); 951 952 mutex_lock(&ov5675->mutex); 953 ov5675_update_pad_format(&supported_modes[0], 954 v4l2_subdev_get_try_format(sd, fh->pad, 0)); 955 mutex_unlock(&ov5675->mutex); 956 957 return 0; 958 } 959 960 static const struct v4l2_subdev_video_ops ov5675_video_ops = { 961 .s_stream = ov5675_set_stream, 962 }; 963 964 static const struct v4l2_subdev_pad_ops ov5675_pad_ops = { 965 .set_fmt = ov5675_set_format, 966 .get_fmt = ov5675_get_format, 967 .enum_mbus_code = ov5675_enum_mbus_code, 968 .enum_frame_size = ov5675_enum_frame_size, 969 }; 970 971 static const struct v4l2_subdev_ops ov5675_subdev_ops = { 972 .video = &ov5675_video_ops, 973 .pad = &ov5675_pad_ops, 974 }; 975 976 static const struct media_entity_operations ov5675_subdev_entity_ops = { 977 .link_validate = v4l2_subdev_link_validate, 978 }; 979 980 static const struct v4l2_subdev_internal_ops ov5675_internal_ops = { 981 .open = ov5675_open, 982 }; 983 984 static int ov5675_identify_module(struct ov5675 *ov5675) 985 { 986 struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd); 987 int ret; 988 u32 val; 989 990 ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID, 991 OV5675_REG_VALUE_24BIT, &val); 992 if (ret) 993 return ret; 994 995 if (val != OV5675_CHIP_ID) { 996 dev_err(&client->dev, "chip id mismatch: %x!=%x", 997 OV5675_CHIP_ID, val); 998 return -ENXIO; 999 } 1000 1001 return 0; 1002 } 1003 1004 static int ov5675_check_hwcfg(struct device *dev) 1005 { 1006 struct fwnode_handle *ep; 1007 struct fwnode_handle *fwnode = dev_fwnode(dev); 1008 struct v4l2_fwnode_endpoint bus_cfg = { 1009 .bus_type = V4L2_MBUS_CSI2_DPHY 1010 }; 1011 u32 mclk; 1012 int ret; 1013 unsigned int i, j; 1014 1015 if (!fwnode) 1016 return -ENXIO; 1017 1018 ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); 1019 1020 if (ret) { 1021 dev_err(dev, "can't get clock frequency"); 1022 return ret; 1023 } 1024 1025 if (mclk != OV5675_MCLK) { 1026 dev_err(dev, "external clock %d is not supported", mclk); 1027 return -EINVAL; 1028 } 1029 1030 ep = fwnode_graph_get_next_endpoint(fwnode, NULL); 1031 if (!ep) 1032 return -ENXIO; 1033 1034 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); 1035 fwnode_handle_put(ep); 1036 if (ret) 1037 return ret; 1038 1039 if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV5675_DATA_LANES) { 1040 dev_err(dev, "number of CSI2 data lanes %d is not supported", 1041 bus_cfg.bus.mipi_csi2.num_data_lanes); 1042 ret = -EINVAL; 1043 goto check_hwcfg_error; 1044 } 1045 1046 if (!bus_cfg.nr_of_link_frequencies) { 1047 dev_err(dev, "no link frequencies defined"); 1048 ret = -EINVAL; 1049 goto check_hwcfg_error; 1050 } 1051 1052 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { 1053 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { 1054 if (link_freq_menu_items[i] == 1055 bus_cfg.link_frequencies[j]) 1056 break; 1057 } 1058 1059 if (j == bus_cfg.nr_of_link_frequencies) { 1060 dev_err(dev, "no link frequency %lld supported", 1061 link_freq_menu_items[i]); 1062 ret = -EINVAL; 1063 goto check_hwcfg_error; 1064 } 1065 } 1066 1067 check_hwcfg_error: 1068 v4l2_fwnode_endpoint_free(&bus_cfg); 1069 1070 return ret; 1071 } 1072 1073 static int ov5675_remove(struct i2c_client *client) 1074 { 1075 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1076 struct ov5675 *ov5675 = to_ov5675(sd); 1077 1078 v4l2_async_unregister_subdev(sd); 1079 media_entity_cleanup(&sd->entity); 1080 v4l2_ctrl_handler_free(sd->ctrl_handler); 1081 pm_runtime_disable(&client->dev); 1082 mutex_destroy(&ov5675->mutex); 1083 1084 return 0; 1085 } 1086 1087 static int ov5675_probe(struct i2c_client *client) 1088 { 1089 struct ov5675 *ov5675; 1090 int ret; 1091 1092 ret = ov5675_check_hwcfg(&client->dev); 1093 if (ret) { 1094 dev_err(&client->dev, "failed to check HW configuration: %d", 1095 ret); 1096 return ret; 1097 } 1098 1099 ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL); 1100 if (!ov5675) 1101 return -ENOMEM; 1102 1103 v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops); 1104 ret = ov5675_identify_module(ov5675); 1105 if (ret) { 1106 dev_err(&client->dev, "failed to find sensor: %d", ret); 1107 return ret; 1108 } 1109 1110 mutex_init(&ov5675->mutex); 1111 ov5675->cur_mode = &supported_modes[0]; 1112 ret = ov5675_init_controls(ov5675); 1113 if (ret) { 1114 dev_err(&client->dev, "failed to init controls: %d", ret); 1115 goto probe_error_v4l2_ctrl_handler_free; 1116 } 1117 1118 ov5675->sd.internal_ops = &ov5675_internal_ops; 1119 ov5675->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1120 ov5675->sd.entity.ops = &ov5675_subdev_entity_ops; 1121 ov5675->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1122 ov5675->pad.flags = MEDIA_PAD_FL_SOURCE; 1123 ret = media_entity_pads_init(&ov5675->sd.entity, 1, &ov5675->pad); 1124 if (ret) { 1125 dev_err(&client->dev, "failed to init entity pads: %d", ret); 1126 goto probe_error_v4l2_ctrl_handler_free; 1127 } 1128 1129 ret = v4l2_async_register_subdev_sensor_common(&ov5675->sd); 1130 if (ret < 0) { 1131 dev_err(&client->dev, "failed to register V4L2 subdev: %d", 1132 ret); 1133 goto probe_error_media_entity_cleanup; 1134 } 1135 1136 /* 1137 * Device is already turned on by i2c-core with ACPI domain PM. 1138 * Enable runtime PM and turn off the device. 1139 */ 1140 pm_runtime_set_active(&client->dev); 1141 pm_runtime_enable(&client->dev); 1142 pm_runtime_idle(&client->dev); 1143 1144 return 0; 1145 1146 probe_error_media_entity_cleanup: 1147 media_entity_cleanup(&ov5675->sd.entity); 1148 1149 probe_error_v4l2_ctrl_handler_free: 1150 v4l2_ctrl_handler_free(ov5675->sd.ctrl_handler); 1151 mutex_destroy(&ov5675->mutex); 1152 1153 return ret; 1154 } 1155 1156 static const struct dev_pm_ops ov5675_pm_ops = { 1157 SET_SYSTEM_SLEEP_PM_OPS(ov5675_suspend, ov5675_resume) 1158 }; 1159 1160 #ifdef CONFIG_ACPI 1161 static const struct acpi_device_id ov5675_acpi_ids[] = { 1162 {"OVTI5675"}, 1163 {} 1164 }; 1165 1166 MODULE_DEVICE_TABLE(acpi, ov5675_acpi_ids); 1167 #endif 1168 1169 static struct i2c_driver ov5675_i2c_driver = { 1170 .driver = { 1171 .name = "ov5675", 1172 .pm = &ov5675_pm_ops, 1173 .acpi_match_table = ACPI_PTR(ov5675_acpi_ids), 1174 }, 1175 .probe_new = ov5675_probe, 1176 .remove = ov5675_remove, 1177 }; 1178 1179 module_i2c_driver(ov5675_i2c_driver); 1180 1181 MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>"); 1182 MODULE_DESCRIPTION("OmniVision OV5675 sensor driver"); 1183 MODULE_LICENSE("GPL v2"); 1184