| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (c) 2020 Intel Corporation. |
| 3 | |
| 4 | #include <linux/acpi.h> |
| 5 | #include <linux/clk.h> |
| 6 | #include <linux/delay.h> |
| 7 | #include <linux/gpio/consumer.h> |
| 8 | #include <linux/i2c.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/nvmem-provider.h> |
| 11 | #include <linux/pm_runtime.h> |
| 12 | #include <linux/regmap.h> |
| 13 | #include <linux/regulator/consumer.h> |
| 14 | #include <linux/unaligned.h> |
| 15 | #include <media/v4l2-ctrls.h> |
| 16 | #include <media/v4l2-device.h> |
| 17 | #include <media/v4l2-fwnode.h> |
| 18 | |
| 19 | #define OV2740_LINK_FREQ_360MHZ 360000000ULL |
| 20 | #define OV2740_LINK_FREQ_180MHZ 180000000ULL |
| 21 | #define OV2740_SCLK 72000000LL |
| 22 | #define OV2740_MCLK 19200000 |
| 23 | #define OV2740_DATA_LANES 2 |
| 24 | #define OV2740_RGB_DEPTH 10 |
| 25 | |
| 26 | #define OV2740_REG_CHIP_ID 0x300a |
| 27 | #define OV2740_CHIP_ID 0x2740 |
| 28 | |
| 29 | #define OV2740_REG_MODE_SELECT 0x0100 |
| 30 | #define OV2740_MODE_STANDBY 0x00 |
| 31 | #define OV2740_MODE_STREAMING 0x01 |
| 32 | |
| 33 | /* vertical-timings from sensor */ |
| 34 | #define OV2740_REG_VTS 0x380e |
| 35 | |
| 36 | /* horizontal-timings from sensor */ |
| 37 | #define OV2740_REG_HTS 0x380c |
| 38 | |
| 39 | /* Exposure controls from sensor */ |
| 40 | #define OV2740_REG_EXPOSURE 0x3500 |
| 41 | #define OV2740_EXPOSURE_MIN 4 |
| 42 | #define OV2740_EXPOSURE_MAX_MARGIN 8 |
| 43 | #define OV2740_EXPOSURE_STEP 1 |
| 44 | |
| 45 | /* Analog gain controls from sensor */ |
| 46 | #define OV2740_REG_ANALOG_GAIN 0x3508 |
| 47 | #define OV2740_ANAL_GAIN_MIN 128 |
| 48 | #define OV2740_ANAL_GAIN_MAX 1983 |
| 49 | #define OV2740_ANAL_GAIN_STEP 1 |
| 50 | |
| 51 | /* Digital gain controls from sensor */ |
| 52 | #define OV2740_REG_MWB_R_GAIN 0x500a |
| 53 | #define OV2740_REG_MWB_G_GAIN 0x500c |
| 54 | #define OV2740_REG_MWB_B_GAIN 0x500e |
| 55 | #define OV2740_DGTL_GAIN_MIN 1024 |
| 56 | #define OV2740_DGTL_GAIN_MAX 4095 |
| 57 | #define OV2740_DGTL_GAIN_STEP 1 |
| 58 | #define OV2740_DGTL_GAIN_DEFAULT 1024 |
| 59 | |
| 60 | /* Test Pattern Control */ |
| 61 | #define OV2740_REG_TEST_PATTERN 0x5040 |
| 62 | #define OV2740_TEST_PATTERN_ENABLE BIT(7) |
| 63 | #define OV2740_TEST_PATTERN_BAR_SHIFT 2 |
| 64 | |
| 65 | /* Group Access */ |
| 66 | #define OV2740_REG_GROUP_ACCESS 0x3208 |
| 67 | #define OV2740_GROUP_HOLD_START 0x0 |
| 68 | #define OV2740_GROUP_HOLD_END 0x10 |
| 69 | #define OV2740_GROUP_HOLD_LAUNCH 0xa0 |
| 70 | |
| 71 | /* ISP CTRL00 */ |
| 72 | #define OV2740_REG_ISP_CTRL00 0x5000 |
| 73 | /* ISP CTRL01 */ |
| 74 | #define OV2740_REG_ISP_CTRL01 0x5001 |
| 75 | /* Customer Addresses: 0x7010 - 0x710F */ |
| 76 | #define CUSTOMER_USE_OTP_SIZE 0x100 |
| 77 | /* OTP registers from sensor */ |
| 78 | #define OV2740_REG_OTP_CUSTOMER 0x7010 |
| 79 | |
| 80 | static const char * const ov2740_supply_name[] = { |
| 81 | "AVDD" , |
| 82 | "DOVDD" , |
| 83 | "DVDD" , |
| 84 | }; |
| 85 | |
| 86 | struct nvm_data { |
| 87 | struct nvmem_device *nvmem; |
| 88 | struct regmap *regmap; |
| 89 | char *nvm_buffer; |
| 90 | }; |
| 91 | |
| 92 | enum { |
| 93 | OV2740_LINK_FREQ_360MHZ_INDEX, |
| 94 | OV2740_LINK_FREQ_180MHZ_INDEX, |
| 95 | }; |
| 96 | |
| 97 | struct ov2740_reg { |
| 98 | u16 address; |
| 99 | u8 val; |
| 100 | }; |
| 101 | |
| 102 | struct ov2740_reg_list { |
| 103 | u32 num_of_regs; |
| 104 | const struct ov2740_reg *regs; |
| 105 | }; |
| 106 | |
| 107 | struct ov2740_link_freq_config { |
| 108 | const struct ov2740_reg_list reg_list; |
| 109 | }; |
| 110 | |
| 111 | struct ov2740_mode { |
| 112 | /* Frame width in pixels */ |
| 113 | u32 width; |
| 114 | |
| 115 | /* Frame height in pixels */ |
| 116 | u32 height; |
| 117 | |
| 118 | /* Horizontal timining size */ |
| 119 | u32 hts; |
| 120 | |
| 121 | /* Default vertical timining size */ |
| 122 | u32 vts_def; |
| 123 | |
| 124 | /* Min vertical timining size */ |
| 125 | u32 vts_min; |
| 126 | |
| 127 | /* Max vertical timining size */ |
| 128 | u32 vts_max; |
| 129 | |
| 130 | /* Link frequency needed for this resolution */ |
| 131 | u32 link_freq_index; |
| 132 | |
| 133 | /* Sensor register settings for this resolution */ |
| 134 | const struct ov2740_reg_list reg_list; |
| 135 | }; |
| 136 | |
| 137 | static const struct ov2740_reg mipi_data_rate_720mbps[] = { |
| 138 | {0x0302, 0x4b}, |
| 139 | {0x030d, 0x4b}, |
| 140 | {0x030e, 0x02}, |
| 141 | {0x030a, 0x01}, |
| 142 | {0x0312, 0x11}, |
| 143 | }; |
| 144 | |
| 145 | static const struct ov2740_reg mipi_data_rate_360mbps[] = { |
| 146 | {0x0302, 0x4b}, |
| 147 | {0x0303, 0x01}, |
| 148 | {0x030d, 0x4b}, |
| 149 | {0x030e, 0x02}, |
| 150 | {0x030a, 0x01}, |
| 151 | {0x0312, 0x11}, |
| 152 | {0x4837, 0x2c}, |
| 153 | }; |
| 154 | |
| 155 | static const struct ov2740_reg mode_1932x1092_regs_360mhz[] = { |
| 156 | {0x3000, 0x00}, |
| 157 | {0x3018, 0x32}, |
| 158 | {0x3031, 0x0a}, |
| 159 | {0x3080, 0x08}, |
| 160 | {0x3083, 0xB4}, |
| 161 | {0x3103, 0x00}, |
| 162 | {0x3104, 0x01}, |
| 163 | {0x3106, 0x01}, |
| 164 | {0x3500, 0x00}, |
| 165 | {0x3501, 0x44}, |
| 166 | {0x3502, 0x40}, |
| 167 | {0x3503, 0x88}, |
| 168 | {0x3507, 0x00}, |
| 169 | {0x3508, 0x00}, |
| 170 | {0x3509, 0x80}, |
| 171 | {0x350c, 0x00}, |
| 172 | {0x350d, 0x80}, |
| 173 | {0x3510, 0x00}, |
| 174 | {0x3511, 0x00}, |
| 175 | {0x3512, 0x20}, |
| 176 | {0x3632, 0x00}, |
| 177 | {0x3633, 0x10}, |
| 178 | {0x3634, 0x10}, |
| 179 | {0x3635, 0x10}, |
| 180 | {0x3645, 0x13}, |
| 181 | {0x3646, 0x81}, |
| 182 | {0x3636, 0x10}, |
| 183 | {0x3651, 0x0a}, |
| 184 | {0x3656, 0x02}, |
| 185 | {0x3659, 0x04}, |
| 186 | {0x365a, 0xda}, |
| 187 | {0x365b, 0xa2}, |
| 188 | {0x365c, 0x04}, |
| 189 | {0x365d, 0x1d}, |
| 190 | {0x365e, 0x1a}, |
| 191 | {0x3662, 0xd7}, |
| 192 | {0x3667, 0x78}, |
| 193 | {0x3669, 0x0a}, |
| 194 | {0x366a, 0x92}, |
| 195 | {0x3700, 0x54}, |
| 196 | {0x3702, 0x10}, |
| 197 | {0x3706, 0x42}, |
| 198 | {0x3709, 0x30}, |
| 199 | {0x370b, 0xc2}, |
| 200 | {0x3714, 0x63}, |
| 201 | {0x3715, 0x01}, |
| 202 | {0x3716, 0x00}, |
| 203 | {0x371a, 0x3e}, |
| 204 | {0x3732, 0x0e}, |
| 205 | {0x3733, 0x10}, |
| 206 | {0x375f, 0x0e}, |
| 207 | {0x3768, 0x30}, |
| 208 | {0x3769, 0x44}, |
| 209 | {0x376a, 0x22}, |
| 210 | {0x377b, 0x20}, |
| 211 | {0x377c, 0x00}, |
| 212 | {0x377d, 0x0c}, |
| 213 | {0x3798, 0x00}, |
| 214 | {0x37a1, 0x55}, |
| 215 | {0x37a8, 0x6d}, |
| 216 | {0x37c2, 0x04}, |
| 217 | {0x37c5, 0x00}, |
| 218 | {0x37c8, 0x00}, |
| 219 | {0x3800, 0x00}, |
| 220 | {0x3801, 0x00}, |
| 221 | {0x3802, 0x00}, |
| 222 | {0x3803, 0x00}, |
| 223 | {0x3804, 0x07}, |
| 224 | {0x3805, 0x8f}, |
| 225 | {0x3806, 0x04}, |
| 226 | {0x3807, 0x47}, |
| 227 | {0x3808, 0x07}, |
| 228 | {0x3809, 0x88}, |
| 229 | {0x380a, 0x04}, |
| 230 | {0x380b, 0x40}, |
| 231 | {0x380c, 0x04}, |
| 232 | {0x380d, 0x38}, |
| 233 | {0x380e, 0x04}, |
| 234 | {0x380f, 0x60}, |
| 235 | {0x3810, 0x00}, |
| 236 | {0x3811, 0x04}, |
| 237 | {0x3812, 0x00}, |
| 238 | {0x3813, 0x04}, |
| 239 | {0x3814, 0x01}, |
| 240 | {0x3815, 0x01}, |
| 241 | {0x3820, 0x80}, |
| 242 | {0x3821, 0x46}, |
| 243 | {0x3822, 0x84}, |
| 244 | {0x3829, 0x00}, |
| 245 | {0x382a, 0x01}, |
| 246 | {0x382b, 0x01}, |
| 247 | {0x3830, 0x04}, |
| 248 | {0x3836, 0x01}, |
| 249 | {0x3837, 0x08}, |
| 250 | {0x3839, 0x01}, |
| 251 | {0x383a, 0x00}, |
| 252 | {0x383b, 0x08}, |
| 253 | {0x383c, 0x00}, |
| 254 | {0x3f0b, 0x00}, |
| 255 | {0x4001, 0x20}, |
| 256 | {0x4009, 0x07}, |
| 257 | {0x4003, 0x10}, |
| 258 | {0x4010, 0xe0}, |
| 259 | {0x4016, 0x00}, |
| 260 | {0x4017, 0x10}, |
| 261 | {0x4044, 0x02}, |
| 262 | {0x4304, 0x08}, |
| 263 | {0x4307, 0x30}, |
| 264 | {0x4320, 0x80}, |
| 265 | {0x4322, 0x00}, |
| 266 | {0x4323, 0x00}, |
| 267 | {0x4324, 0x00}, |
| 268 | {0x4325, 0x00}, |
| 269 | {0x4326, 0x00}, |
| 270 | {0x4327, 0x00}, |
| 271 | {0x4328, 0x00}, |
| 272 | {0x4329, 0x00}, |
| 273 | {0x432c, 0x03}, |
| 274 | {0x432d, 0x81}, |
| 275 | {0x4501, 0x84}, |
| 276 | {0x4502, 0x40}, |
| 277 | {0x4503, 0x18}, |
| 278 | {0x4504, 0x04}, |
| 279 | {0x4508, 0x02}, |
| 280 | {0x4601, 0x10}, |
| 281 | {0x4800, 0x00}, |
| 282 | {0x4816, 0x52}, |
| 283 | {0x4837, 0x16}, |
| 284 | {0x5000, 0x7f}, |
| 285 | {0x5001, 0x00}, |
| 286 | {0x5005, 0x38}, |
| 287 | {0x501e, 0x0d}, |
| 288 | {0x5040, 0x00}, |
| 289 | {0x5901, 0x00}, |
| 290 | {0x3800, 0x00}, |
| 291 | {0x3801, 0x00}, |
| 292 | {0x3802, 0x00}, |
| 293 | {0x3803, 0x00}, |
| 294 | {0x3804, 0x07}, |
| 295 | {0x3805, 0x8f}, |
| 296 | {0x3806, 0x04}, |
| 297 | {0x3807, 0x47}, |
| 298 | {0x3808, 0x07}, |
| 299 | {0x3809, 0x8c}, |
| 300 | {0x380a, 0x04}, |
| 301 | {0x380b, 0x44}, |
| 302 | {0x3810, 0x00}, |
| 303 | {0x3811, 0x00}, |
| 304 | {0x3812, 0x00}, |
| 305 | {0x3813, 0x01}, |
| 306 | }; |
| 307 | |
| 308 | static const struct ov2740_reg mode_1932x1092_regs_180mhz[] = { |
| 309 | {0x3000, 0x00}, |
| 310 | {0x3018, 0x32}, /* 0x32 for 2 lanes, 0x12 for 1 lane */ |
| 311 | {0x3031, 0x0a}, |
| 312 | {0x3080, 0x08}, |
| 313 | {0x3083, 0xB4}, |
| 314 | {0x3103, 0x00}, |
| 315 | {0x3104, 0x01}, |
| 316 | {0x3106, 0x01}, |
| 317 | {0x3500, 0x00}, |
| 318 | {0x3501, 0x44}, |
| 319 | {0x3502, 0x40}, |
| 320 | {0x3503, 0x88}, |
| 321 | {0x3507, 0x00}, |
| 322 | {0x3508, 0x00}, |
| 323 | {0x3509, 0x80}, |
| 324 | {0x350c, 0x00}, |
| 325 | {0x350d, 0x80}, |
| 326 | {0x3510, 0x00}, |
| 327 | {0x3511, 0x00}, |
| 328 | {0x3512, 0x20}, |
| 329 | {0x3632, 0x00}, |
| 330 | {0x3633, 0x10}, |
| 331 | {0x3634, 0x10}, |
| 332 | {0x3635, 0x10}, |
| 333 | {0x3645, 0x13}, |
| 334 | {0x3646, 0x81}, |
| 335 | {0x3636, 0x10}, |
| 336 | {0x3651, 0x0a}, |
| 337 | {0x3656, 0x02}, |
| 338 | {0x3659, 0x04}, |
| 339 | {0x365a, 0xda}, |
| 340 | {0x365b, 0xa2}, |
| 341 | {0x365c, 0x04}, |
| 342 | {0x365d, 0x1d}, |
| 343 | {0x365e, 0x1a}, |
| 344 | {0x3662, 0xd7}, |
| 345 | {0x3667, 0x78}, |
| 346 | {0x3669, 0x0a}, |
| 347 | {0x366a, 0x92}, |
| 348 | {0x3700, 0x54}, |
| 349 | {0x3702, 0x10}, |
| 350 | {0x3706, 0x42}, |
| 351 | {0x3709, 0x30}, |
| 352 | {0x370b, 0xc2}, |
| 353 | {0x3714, 0x63}, |
| 354 | {0x3715, 0x01}, |
| 355 | {0x3716, 0x00}, |
| 356 | {0x371a, 0x3e}, |
| 357 | {0x3732, 0x0e}, |
| 358 | {0x3733, 0x10}, |
| 359 | {0x375f, 0x0e}, |
| 360 | {0x3768, 0x30}, |
| 361 | {0x3769, 0x44}, |
| 362 | {0x376a, 0x22}, |
| 363 | {0x377b, 0x20}, |
| 364 | {0x377c, 0x00}, |
| 365 | {0x377d, 0x0c}, |
| 366 | {0x3798, 0x00}, |
| 367 | {0x37a1, 0x55}, |
| 368 | {0x37a8, 0x6d}, |
| 369 | {0x37c2, 0x04}, |
| 370 | {0x37c5, 0x00}, |
| 371 | {0x37c8, 0x00}, |
| 372 | {0x3800, 0x00}, |
| 373 | {0x3801, 0x00}, |
| 374 | {0x3802, 0x00}, |
| 375 | {0x3803, 0x00}, |
| 376 | {0x3804, 0x07}, |
| 377 | {0x3805, 0x8f}, |
| 378 | {0x3806, 0x04}, |
| 379 | {0x3807, 0x47}, |
| 380 | {0x3808, 0x07}, |
| 381 | {0x3809, 0x88}, |
| 382 | {0x380a, 0x04}, |
| 383 | {0x380b, 0x40}, |
| 384 | {0x380c, 0x08}, |
| 385 | {0x380d, 0x70}, |
| 386 | {0x380e, 0x04}, |
| 387 | {0x380f, 0x56}, |
| 388 | {0x3810, 0x00}, |
| 389 | {0x3811, 0x04}, |
| 390 | {0x3812, 0x00}, |
| 391 | {0x3813, 0x04}, |
| 392 | {0x3814, 0x01}, |
| 393 | {0x3815, 0x01}, |
| 394 | {0x3820, 0x80}, |
| 395 | {0x3821, 0x46}, |
| 396 | {0x3822, 0x84}, |
| 397 | {0x3829, 0x00}, |
| 398 | {0x382a, 0x01}, |
| 399 | {0x382b, 0x01}, |
| 400 | {0x3830, 0x04}, |
| 401 | {0x3836, 0x01}, |
| 402 | {0x3837, 0x08}, |
| 403 | {0x3839, 0x01}, |
| 404 | {0x383a, 0x00}, |
| 405 | {0x383b, 0x08}, |
| 406 | {0x383c, 0x00}, |
| 407 | {0x3f0b, 0x00}, |
| 408 | {0x4001, 0x20}, |
| 409 | {0x4009, 0x07}, |
| 410 | {0x4003, 0x10}, |
| 411 | {0x4010, 0xe0}, |
| 412 | {0x4016, 0x00}, |
| 413 | {0x4017, 0x10}, |
| 414 | {0x4044, 0x02}, |
| 415 | {0x4304, 0x08}, |
| 416 | {0x4307, 0x30}, |
| 417 | {0x4320, 0x80}, |
| 418 | {0x4322, 0x00}, |
| 419 | {0x4323, 0x00}, |
| 420 | {0x4324, 0x00}, |
| 421 | {0x4325, 0x00}, |
| 422 | {0x4326, 0x00}, |
| 423 | {0x4327, 0x00}, |
| 424 | {0x4328, 0x00}, |
| 425 | {0x4329, 0x00}, |
| 426 | {0x432c, 0x03}, |
| 427 | {0x432d, 0x81}, |
| 428 | {0x4501, 0x84}, |
| 429 | {0x4502, 0x40}, |
| 430 | {0x4503, 0x18}, |
| 431 | {0x4504, 0x04}, |
| 432 | {0x4508, 0x02}, |
| 433 | {0x4601, 0x10}, |
| 434 | {0x4800, 0x00}, |
| 435 | {0x4816, 0x52}, |
| 436 | {0x5000, 0x73}, /* 0x7f enable DPC */ |
| 437 | {0x5001, 0x00}, |
| 438 | {0x5005, 0x38}, |
| 439 | {0x501e, 0x0d}, |
| 440 | {0x5040, 0x00}, |
| 441 | {0x5901, 0x00}, |
| 442 | {0x3800, 0x00}, |
| 443 | {0x3801, 0x00}, |
| 444 | {0x3802, 0x00}, |
| 445 | {0x3803, 0x00}, |
| 446 | {0x3804, 0x07}, |
| 447 | {0x3805, 0x8f}, |
| 448 | {0x3806, 0x04}, |
| 449 | {0x3807, 0x47}, |
| 450 | {0x3808, 0x07}, |
| 451 | {0x3809, 0x8c}, |
| 452 | {0x380a, 0x04}, |
| 453 | {0x380b, 0x44}, |
| 454 | {0x3810, 0x00}, |
| 455 | {0x3811, 0x00}, |
| 456 | {0x3812, 0x00}, |
| 457 | {0x3813, 0x01}, |
| 458 | {0x4003, 0x40}, /* set Black level to 0x40 */ |
| 459 | }; |
| 460 | |
| 461 | static const char * const [] = { |
| 462 | "Disabled" , |
| 463 | "Color Bar" , |
| 464 | "Top-Bottom Darker Color Bar" , |
| 465 | "Right-Left Darker Color Bar" , |
| 466 | "Bottom-Top Darker Color Bar" , |
| 467 | }; |
| 468 | |
| 469 | static const s64 [] = { |
| 470 | OV2740_LINK_FREQ_360MHZ, |
| 471 | OV2740_LINK_FREQ_180MHZ, |
| 472 | }; |
| 473 | |
| 474 | static const struct ov2740_link_freq_config link_freq_configs[] = { |
| 475 | [OV2740_LINK_FREQ_360MHZ_INDEX] = { |
| 476 | .reg_list = { |
| 477 | .num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps), |
| 478 | .regs = mipi_data_rate_720mbps, |
| 479 | } |
| 480 | }, |
| 481 | [OV2740_LINK_FREQ_180MHZ_INDEX] = { |
| 482 | .reg_list = { |
| 483 | .num_of_regs = ARRAY_SIZE(mipi_data_rate_360mbps), |
| 484 | .regs = mipi_data_rate_360mbps, |
| 485 | } |
| 486 | }, |
| 487 | }; |
| 488 | |
| 489 | static const struct ov2740_mode supported_modes_360mhz[] = { |
| 490 | { |
| 491 | .width = 1932, |
| 492 | .height = 1092, |
| 493 | .hts = 2160, |
| 494 | .vts_min = 1120, |
| 495 | .vts_def = 2186, |
| 496 | .vts_max = 32767, |
| 497 | .reg_list = { |
| 498 | .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_360mhz), |
| 499 | .regs = mode_1932x1092_regs_360mhz, |
| 500 | }, |
| 501 | .link_freq_index = OV2740_LINK_FREQ_360MHZ_INDEX, |
| 502 | }, |
| 503 | }; |
| 504 | |
| 505 | static const struct ov2740_mode supported_modes_180mhz[] = { |
| 506 | { |
| 507 | .width = 1932, |
| 508 | .height = 1092, |
| 509 | .hts = 2160, |
| 510 | .vts_min = 1110, |
| 511 | .vts_def = 1110, |
| 512 | .vts_max = 2047, |
| 513 | .reg_list = { |
| 514 | .num_of_regs = ARRAY_SIZE(mode_1932x1092_regs_180mhz), |
| 515 | .regs = mode_1932x1092_regs_180mhz, |
| 516 | }, |
| 517 | .link_freq_index = OV2740_LINK_FREQ_180MHZ_INDEX, |
| 518 | }, |
| 519 | }; |
| 520 | |
| 521 | struct ov2740 { |
| 522 | struct device *dev; |
| 523 | |
| 524 | struct v4l2_subdev sd; |
| 525 | struct media_pad pad; |
| 526 | struct v4l2_ctrl_handler ctrl_handler; |
| 527 | |
| 528 | /* V4L2 Controls */ |
| 529 | struct v4l2_ctrl *link_freq; |
| 530 | struct v4l2_ctrl *pixel_rate; |
| 531 | struct v4l2_ctrl *vblank; |
| 532 | struct v4l2_ctrl *hblank; |
| 533 | struct v4l2_ctrl *exposure; |
| 534 | |
| 535 | /* GPIOs, clocks, regulators */ |
| 536 | struct gpio_desc *reset_gpio; |
| 537 | struct gpio_desc *powerdown_gpio; |
| 538 | struct clk *clk; |
| 539 | struct regulator_bulk_data supplies[ARRAY_SIZE(ov2740_supply_name)]; |
| 540 | |
| 541 | /* Current mode */ |
| 542 | const struct ov2740_mode *cur_mode; |
| 543 | |
| 544 | /* NVM data information */ |
| 545 | struct nvm_data *nvm; |
| 546 | |
| 547 | /* Supported modes */ |
| 548 | const struct ov2740_mode *supported_modes; |
| 549 | int supported_modes_count; |
| 550 | |
| 551 | /* True if the device has been identified */ |
| 552 | bool identified; |
| 553 | }; |
| 554 | |
| 555 | static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev) |
| 556 | { |
| 557 | return container_of(subdev, struct ov2740, sd); |
| 558 | } |
| 559 | |
| 560 | static u64 to_pixel_rate(u32 f_index) |
| 561 | { |
| 562 | u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV2740_DATA_LANES; |
| 563 | |
| 564 | do_div(pixel_rate, OV2740_RGB_DEPTH); |
| 565 | |
| 566 | return pixel_rate; |
| 567 | } |
| 568 | |
| 569 | static int ov2740_read_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 *val) |
| 570 | { |
| 571 | struct i2c_client *client = v4l2_get_subdevdata(sd: &ov2740->sd); |
| 572 | struct i2c_msg msgs[2]; |
| 573 | u8 addr_buf[2]; |
| 574 | u8 data_buf[4] = {0}; |
| 575 | int ret; |
| 576 | |
| 577 | if (len > sizeof(data_buf)) |
| 578 | return -EINVAL; |
| 579 | |
| 580 | put_unaligned_be16(val: reg, p: addr_buf); |
| 581 | msgs[0].addr = client->addr; |
| 582 | msgs[0].flags = 0; |
| 583 | msgs[0].len = sizeof(addr_buf); |
| 584 | msgs[0].buf = addr_buf; |
| 585 | msgs[1].addr = client->addr; |
| 586 | msgs[1].flags = I2C_M_RD; |
| 587 | msgs[1].len = len; |
| 588 | msgs[1].buf = &data_buf[sizeof(data_buf) - len]; |
| 589 | |
| 590 | ret = i2c_transfer(adap: client->adapter, msgs, ARRAY_SIZE(msgs)); |
| 591 | if (ret != ARRAY_SIZE(msgs)) |
| 592 | return ret < 0 ? ret : -EIO; |
| 593 | |
| 594 | *val = get_unaligned_be32(p: data_buf); |
| 595 | |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | static int ov2740_write_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 val) |
| 600 | { |
| 601 | struct i2c_client *client = v4l2_get_subdevdata(sd: &ov2740->sd); |
| 602 | u8 buf[6]; |
| 603 | int ret; |
| 604 | |
| 605 | if (len > 4) |
| 606 | return -EINVAL; |
| 607 | |
| 608 | put_unaligned_be16(val: reg, p: buf); |
| 609 | put_unaligned_be32(val: val << 8 * (4 - len), p: buf + 2); |
| 610 | |
| 611 | ret = i2c_master_send(client, buf, count: len + 2); |
| 612 | if (ret != len + 2) |
| 613 | return ret < 0 ? ret : -EIO; |
| 614 | |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | static int ov2740_write_reg_list(struct ov2740 *ov2740, |
| 619 | const struct ov2740_reg_list *r_list) |
| 620 | { |
| 621 | unsigned int i; |
| 622 | int ret; |
| 623 | |
| 624 | for (i = 0; i < r_list->num_of_regs; i++) { |
| 625 | ret = ov2740_write_reg(ov2740, reg: r_list->regs[i].address, len: 1, |
| 626 | val: r_list->regs[i].val); |
| 627 | if (ret) { |
| 628 | dev_err_ratelimited(ov2740->dev, |
| 629 | "write reg 0x%4.4x return err = %d\n" , |
| 630 | r_list->regs[i].address, ret); |
| 631 | return ret; |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | static int ov2740_identify_module(struct ov2740 *ov2740) |
| 639 | { |
| 640 | int ret; |
| 641 | u32 val; |
| 642 | |
| 643 | if (ov2740->identified) |
| 644 | return 0; |
| 645 | |
| 646 | ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, len: 3, val: &val); |
| 647 | if (ret) |
| 648 | return ret; |
| 649 | |
| 650 | if (val != OV2740_CHIP_ID) { |
| 651 | dev_err(ov2740->dev, "chip id mismatch: %x != %x\n" , |
| 652 | OV2740_CHIP_ID, val); |
| 653 | return -ENXIO; |
| 654 | } |
| 655 | |
| 656 | dev_dbg(ov2740->dev, "chip id: 0x%x\n" , val); |
| 657 | |
| 658 | ov2740->identified = true; |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain) |
| 664 | { |
| 665 | int ret; |
| 666 | |
| 667 | ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1, |
| 668 | OV2740_GROUP_HOLD_START); |
| 669 | if (ret) |
| 670 | return ret; |
| 671 | |
| 672 | ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, len: 2, val: d_gain); |
| 673 | if (ret) |
| 674 | return ret; |
| 675 | |
| 676 | ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_G_GAIN, len: 2, val: d_gain); |
| 677 | if (ret) |
| 678 | return ret; |
| 679 | |
| 680 | ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, len: 2, val: d_gain); |
| 681 | if (ret) |
| 682 | return ret; |
| 683 | |
| 684 | ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1, |
| 685 | OV2740_GROUP_HOLD_END); |
| 686 | if (ret) |
| 687 | return ret; |
| 688 | |
| 689 | ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, len: 1, |
| 690 | OV2740_GROUP_HOLD_LAUNCH); |
| 691 | return ret; |
| 692 | } |
| 693 | |
| 694 | static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern) |
| 695 | { |
| 696 | if (pattern) |
| 697 | pattern = (pattern - 1) << OV2740_TEST_PATTERN_BAR_SHIFT | |
| 698 | OV2740_TEST_PATTERN_ENABLE; |
| 699 | |
| 700 | return ov2740_write_reg(ov2740, OV2740_REG_TEST_PATTERN, len: 1, val: pattern); |
| 701 | } |
| 702 | |
| 703 | static int ov2740_set_ctrl(struct v4l2_ctrl *ctrl) |
| 704 | { |
| 705 | struct ov2740 *ov2740 = container_of(ctrl->handler, |
| 706 | struct ov2740, ctrl_handler); |
| 707 | s64 exposure_max; |
| 708 | int ret; |
| 709 | |
| 710 | /* Propagate change of current control to all related controls */ |
| 711 | if (ctrl->id == V4L2_CID_VBLANK) { |
| 712 | /* Update max exposure while meeting expected vblanking */ |
| 713 | exposure_max = ov2740->cur_mode->height + ctrl->val - |
| 714 | OV2740_EXPOSURE_MAX_MARGIN; |
| 715 | __v4l2_ctrl_modify_range(ctrl: ov2740->exposure, |
| 716 | min: ov2740->exposure->minimum, |
| 717 | max: exposure_max, step: ov2740->exposure->step, |
| 718 | def: exposure_max); |
| 719 | } |
| 720 | |
| 721 | /* V4L2 controls values will be applied only when power is already up */ |
| 722 | if (!pm_runtime_get_if_in_use(dev: ov2740->dev)) |
| 723 | return 0; |
| 724 | |
| 725 | switch (ctrl->id) { |
| 726 | case V4L2_CID_ANALOGUE_GAIN: |
| 727 | ret = ov2740_write_reg(ov2740, OV2740_REG_ANALOG_GAIN, len: 2, |
| 728 | val: ctrl->val); |
| 729 | break; |
| 730 | |
| 731 | case V4L2_CID_DIGITAL_GAIN: |
| 732 | ret = ov2740_update_digital_gain(ov2740, d_gain: ctrl->val); |
| 733 | break; |
| 734 | |
| 735 | case V4L2_CID_EXPOSURE: |
| 736 | /* 4 least significant bits of expsoure are fractional part */ |
| 737 | ret = ov2740_write_reg(ov2740, OV2740_REG_EXPOSURE, len: 3, |
| 738 | val: ctrl->val << 4); |
| 739 | break; |
| 740 | |
| 741 | case V4L2_CID_VBLANK: |
| 742 | ret = ov2740_write_reg(ov2740, OV2740_REG_VTS, len: 2, |
| 743 | val: ov2740->cur_mode->height + ctrl->val); |
| 744 | break; |
| 745 | |
| 746 | case V4L2_CID_TEST_PATTERN: |
| 747 | ret = ov2740_test_pattern(ov2740, pattern: ctrl->val); |
| 748 | break; |
| 749 | |
| 750 | default: |
| 751 | ret = -EINVAL; |
| 752 | break; |
| 753 | } |
| 754 | |
| 755 | pm_runtime_put(dev: ov2740->dev); |
| 756 | |
| 757 | return ret; |
| 758 | } |
| 759 | |
| 760 | static const struct v4l2_ctrl_ops ov2740_ctrl_ops = { |
| 761 | .s_ctrl = ov2740_set_ctrl, |
| 762 | }; |
| 763 | |
| 764 | static int ov2740_init_controls(struct ov2740 *ov2740) |
| 765 | { |
| 766 | struct v4l2_ctrl_handler *ctrl_hdlr; |
| 767 | s64 exposure_max, h_blank, pixel_rate; |
| 768 | u32 vblank_min, vblank_max, vblank_default; |
| 769 | struct v4l2_fwnode_device_properties props; |
| 770 | int ret; |
| 771 | |
| 772 | ctrl_hdlr = &ov2740->ctrl_handler; |
| 773 | ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10); |
| 774 | if (ret) |
| 775 | return ret; |
| 776 | |
| 777 | ov2740->link_freq = |
| 778 | v4l2_ctrl_new_int_menu(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 779 | V4L2_CID_LINK_FREQ, |
| 780 | ARRAY_SIZE(link_freq_menu_items) - 1, |
| 781 | def: ov2740->supported_modes->link_freq_index, |
| 782 | qmenu_int: link_freq_menu_items); |
| 783 | if (ov2740->link_freq) |
| 784 | ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
| 785 | |
| 786 | pixel_rate = to_pixel_rate(f_index: ov2740->supported_modes->link_freq_index); |
| 787 | ov2740->pixel_rate = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 788 | V4L2_CID_PIXEL_RATE, min: 0, |
| 789 | max: pixel_rate, step: 1, def: pixel_rate); |
| 790 | |
| 791 | vblank_min = ov2740->cur_mode->vts_min - ov2740->cur_mode->height; |
| 792 | vblank_max = ov2740->cur_mode->vts_max - ov2740->cur_mode->height; |
| 793 | vblank_default = ov2740->cur_mode->vts_def - ov2740->cur_mode->height; |
| 794 | ov2740->vblank = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 795 | V4L2_CID_VBLANK, min: vblank_min, |
| 796 | max: vblank_max, step: 1, def: vblank_default); |
| 797 | |
| 798 | h_blank = ov2740->cur_mode->hts - ov2740->cur_mode->width; |
| 799 | ov2740->hblank = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 800 | V4L2_CID_HBLANK, min: h_blank, max: h_blank, step: 1, |
| 801 | def: h_blank); |
| 802 | if (ov2740->hblank) |
| 803 | ov2740->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
| 804 | |
| 805 | v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, |
| 806 | OV2740_ANAL_GAIN_MIN, OV2740_ANAL_GAIN_MAX, |
| 807 | OV2740_ANAL_GAIN_STEP, OV2740_ANAL_GAIN_MIN); |
| 808 | v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, V4L2_CID_DIGITAL_GAIN, |
| 809 | OV2740_DGTL_GAIN_MIN, OV2740_DGTL_GAIN_MAX, |
| 810 | OV2740_DGTL_GAIN_STEP, OV2740_DGTL_GAIN_DEFAULT); |
| 811 | exposure_max = ov2740->cur_mode->vts_def - OV2740_EXPOSURE_MAX_MARGIN; |
| 812 | ov2740->exposure = v4l2_ctrl_new_std(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 813 | V4L2_CID_EXPOSURE, |
| 814 | OV2740_EXPOSURE_MIN, max: exposure_max, |
| 815 | OV2740_EXPOSURE_STEP, |
| 816 | def: exposure_max); |
| 817 | v4l2_ctrl_new_std_menu_items(hdl: ctrl_hdlr, ops: &ov2740_ctrl_ops, |
| 818 | V4L2_CID_TEST_PATTERN, |
| 819 | ARRAY_SIZE(ov2740_test_pattern_menu) - 1, |
| 820 | mask: 0, def: 0, qmenu: ov2740_test_pattern_menu); |
| 821 | |
| 822 | ret = v4l2_fwnode_device_parse(dev: ov2740->dev, props: &props); |
| 823 | if (ret) { |
| 824 | v4l2_ctrl_handler_free(hdl: ctrl_hdlr); |
| 825 | return ret; |
| 826 | } |
| 827 | |
| 828 | v4l2_ctrl_new_fwnode_properties(hdl: ctrl_hdlr, ctrl_ops: &ov2740_ctrl_ops, p: &props); |
| 829 | |
| 830 | if (ctrl_hdlr->error) { |
| 831 | v4l2_ctrl_handler_free(hdl: ctrl_hdlr); |
| 832 | return ctrl_hdlr->error; |
| 833 | } |
| 834 | |
| 835 | ov2740->sd.ctrl_handler = ctrl_hdlr; |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | static void ov2740_update_pad_format(const struct ov2740_mode *mode, |
| 841 | struct v4l2_mbus_framefmt *fmt) |
| 842 | { |
| 843 | fmt->width = mode->width; |
| 844 | fmt->height = mode->height; |
| 845 | fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; |
| 846 | fmt->field = V4L2_FIELD_NONE; |
| 847 | } |
| 848 | |
| 849 | static int ov2740_load_otp_data(struct nvm_data *nvm) |
| 850 | { |
| 851 | struct device *dev = regmap_get_device(map: nvm->regmap); |
| 852 | struct ov2740 *ov2740 = to_ov2740(subdev: dev_get_drvdata(dev)); |
| 853 | u32 isp_ctrl00 = 0; |
| 854 | u32 isp_ctrl01 = 0; |
| 855 | int ret; |
| 856 | |
| 857 | if (nvm->nvm_buffer) |
| 858 | return 0; |
| 859 | |
| 860 | nvm->nvm_buffer = kzalloc(CUSTOMER_USE_OTP_SIZE, GFP_KERNEL); |
| 861 | if (!nvm->nvm_buffer) |
| 862 | return -ENOMEM; |
| 863 | |
| 864 | ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1, val: &isp_ctrl00); |
| 865 | if (ret) { |
| 866 | dev_err(dev, "failed to read ISP CTRL00\n" ); |
| 867 | goto err; |
| 868 | } |
| 869 | |
| 870 | ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1, val: &isp_ctrl01); |
| 871 | if (ret) { |
| 872 | dev_err(dev, "failed to read ISP CTRL01\n" ); |
| 873 | goto err; |
| 874 | } |
| 875 | |
| 876 | /* Clear bit 5 of ISP CTRL00 */ |
| 877 | ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1, |
| 878 | val: isp_ctrl00 & ~BIT(5)); |
| 879 | if (ret) { |
| 880 | dev_err(dev, "failed to set ISP CTRL00\n" ); |
| 881 | goto err; |
| 882 | } |
| 883 | |
| 884 | /* Clear bit 7 of ISP CTRL01 */ |
| 885 | ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1, |
| 886 | val: isp_ctrl01 & ~BIT(7)); |
| 887 | if (ret) { |
| 888 | dev_err(dev, "failed to set ISP CTRL01\n" ); |
| 889 | goto err; |
| 890 | } |
| 891 | |
| 892 | ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1, |
| 893 | OV2740_MODE_STREAMING); |
| 894 | if (ret) { |
| 895 | dev_err(dev, "failed to set streaming mode\n" ); |
| 896 | goto err; |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * Users are not allowed to access OTP-related registers and memory |
| 901 | * during the 20 ms period after streaming starts (0x100 = 0x01). |
| 902 | */ |
| 903 | msleep(msecs: 20); |
| 904 | |
| 905 | ret = regmap_bulk_read(map: nvm->regmap, OV2740_REG_OTP_CUSTOMER, |
| 906 | val: nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE); |
| 907 | if (ret) { |
| 908 | dev_err(dev, "failed to read OTP data, ret %d\n" , ret); |
| 909 | goto err; |
| 910 | } |
| 911 | |
| 912 | ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1, |
| 913 | OV2740_MODE_STANDBY); |
| 914 | if (ret) { |
| 915 | dev_err(dev, "failed to set streaming mode\n" ); |
| 916 | goto err; |
| 917 | } |
| 918 | |
| 919 | ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, len: 1, val: isp_ctrl01); |
| 920 | if (ret) { |
| 921 | dev_err(dev, "failed to set ISP CTRL01\n" ); |
| 922 | goto err; |
| 923 | } |
| 924 | |
| 925 | ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, len: 1, val: isp_ctrl00); |
| 926 | if (ret) { |
| 927 | dev_err(dev, "failed to set ISP CTRL00\n" ); |
| 928 | goto err; |
| 929 | } |
| 930 | |
| 931 | return 0; |
| 932 | err: |
| 933 | kfree(objp: nvm->nvm_buffer); |
| 934 | nvm->nvm_buffer = NULL; |
| 935 | |
| 936 | return ret; |
| 937 | } |
| 938 | |
| 939 | static int ov2740_start_streaming(struct ov2740 *ov2740) |
| 940 | { |
| 941 | const struct ov2740_reg_list *reg_list; |
| 942 | int link_freq_index; |
| 943 | int ret; |
| 944 | |
| 945 | ret = ov2740_identify_module(ov2740); |
| 946 | if (ret) |
| 947 | return ret; |
| 948 | |
| 949 | if (ov2740->nvm) |
| 950 | ov2740_load_otp_data(nvm: ov2740->nvm); |
| 951 | |
| 952 | /* Reset the sensor */ |
| 953 | ret = ov2740_write_reg(ov2740, reg: 0x0103, len: 1, val: 0x01); |
| 954 | if (ret) { |
| 955 | dev_err(ov2740->dev, "failed to reset\n" ); |
| 956 | return ret; |
| 957 | } |
| 958 | |
| 959 | usleep_range(min: 10000, max: 15000); |
| 960 | |
| 961 | link_freq_index = ov2740->cur_mode->link_freq_index; |
| 962 | reg_list = &link_freq_configs[link_freq_index].reg_list; |
| 963 | ret = ov2740_write_reg_list(ov2740, r_list: reg_list); |
| 964 | if (ret) { |
| 965 | dev_err(ov2740->dev, "failed to set plls\n" ); |
| 966 | return ret; |
| 967 | } |
| 968 | |
| 969 | reg_list = &ov2740->cur_mode->reg_list; |
| 970 | ret = ov2740_write_reg_list(ov2740, r_list: reg_list); |
| 971 | if (ret) { |
| 972 | dev_err(ov2740->dev, "failed to set mode\n" ); |
| 973 | return ret; |
| 974 | } |
| 975 | |
| 976 | ret = __v4l2_ctrl_handler_setup(hdl: ov2740->sd.ctrl_handler); |
| 977 | if (ret) |
| 978 | return ret; |
| 979 | |
| 980 | ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1, |
| 981 | OV2740_MODE_STREAMING); |
| 982 | if (ret) |
| 983 | dev_err(ov2740->dev, "failed to start streaming\n" ); |
| 984 | |
| 985 | return ret; |
| 986 | } |
| 987 | |
| 988 | static void ov2740_stop_streaming(struct ov2740 *ov2740) |
| 989 | { |
| 990 | if (ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, len: 1, |
| 991 | OV2740_MODE_STANDBY)) |
| 992 | dev_err(ov2740->dev, "failed to stop streaming\n" ); |
| 993 | } |
| 994 | |
| 995 | static int ov2740_set_stream(struct v4l2_subdev *sd, int enable) |
| 996 | { |
| 997 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 998 | struct v4l2_subdev_state *sd_state; |
| 999 | int ret = 0; |
| 1000 | |
| 1001 | sd_state = v4l2_subdev_lock_and_get_active_state(sd: &ov2740->sd); |
| 1002 | |
| 1003 | if (enable) { |
| 1004 | ret = pm_runtime_resume_and_get(dev: ov2740->dev); |
| 1005 | if (ret < 0) |
| 1006 | goto out_unlock; |
| 1007 | |
| 1008 | ret = ov2740_start_streaming(ov2740); |
| 1009 | if (ret) { |
| 1010 | enable = 0; |
| 1011 | ov2740_stop_streaming(ov2740); |
| 1012 | pm_runtime_put(dev: ov2740->dev); |
| 1013 | } |
| 1014 | } else { |
| 1015 | ov2740_stop_streaming(ov2740); |
| 1016 | pm_runtime_put(dev: ov2740->dev); |
| 1017 | } |
| 1018 | |
| 1019 | out_unlock: |
| 1020 | v4l2_subdev_unlock_state(state: sd_state); |
| 1021 | |
| 1022 | return ret; |
| 1023 | } |
| 1024 | |
| 1025 | static int ov2740_set_format(struct v4l2_subdev *sd, |
| 1026 | struct v4l2_subdev_state *sd_state, |
| 1027 | struct v4l2_subdev_format *fmt) |
| 1028 | { |
| 1029 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 1030 | const struct ov2740_mode *mode; |
| 1031 | s32 vblank_def, h_blank; |
| 1032 | |
| 1033 | mode = v4l2_find_nearest_size(ov2740->supported_modes, |
| 1034 | ov2740->supported_modes_count, |
| 1035 | width, height, |
| 1036 | fmt->format.width, fmt->format.height); |
| 1037 | |
| 1038 | ov2740_update_pad_format(mode, fmt: &fmt->format); |
| 1039 | *v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format; |
| 1040 | |
| 1041 | if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) |
| 1042 | return 0; |
| 1043 | |
| 1044 | ov2740->cur_mode = mode; |
| 1045 | __v4l2_ctrl_s_ctrl(ctrl: ov2740->link_freq, val: mode->link_freq_index); |
| 1046 | __v4l2_ctrl_s_ctrl_int64(ctrl: ov2740->pixel_rate, |
| 1047 | val: to_pixel_rate(f_index: mode->link_freq_index)); |
| 1048 | |
| 1049 | /* Update limits and set FPS to default */ |
| 1050 | vblank_def = mode->vts_def - mode->height; |
| 1051 | __v4l2_ctrl_modify_range(ctrl: ov2740->vblank, |
| 1052 | min: mode->vts_min - mode->height, |
| 1053 | max: mode->vts_max - mode->height, step: 1, def: vblank_def); |
| 1054 | __v4l2_ctrl_s_ctrl(ctrl: ov2740->vblank, val: vblank_def); |
| 1055 | h_blank = mode->hts - mode->width; |
| 1056 | __v4l2_ctrl_modify_range(ctrl: ov2740->hblank, min: h_blank, max: h_blank, step: 1, def: h_blank); |
| 1057 | |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | static int ov2740_enum_mbus_code(struct v4l2_subdev *sd, |
| 1062 | struct v4l2_subdev_state *sd_state, |
| 1063 | struct v4l2_subdev_mbus_code_enum *code) |
| 1064 | { |
| 1065 | if (code->index > 0) |
| 1066 | return -EINVAL; |
| 1067 | |
| 1068 | code->code = MEDIA_BUS_FMT_SGRBG10_1X10; |
| 1069 | |
| 1070 | return 0; |
| 1071 | } |
| 1072 | |
| 1073 | static int ov2740_enum_frame_size(struct v4l2_subdev *sd, |
| 1074 | struct v4l2_subdev_state *sd_state, |
| 1075 | struct v4l2_subdev_frame_size_enum *fse) |
| 1076 | { |
| 1077 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 1078 | const struct ov2740_mode *supported_modes = ov2740->supported_modes; |
| 1079 | |
| 1080 | if (fse->index >= ov2740->supported_modes_count) |
| 1081 | return -EINVAL; |
| 1082 | |
| 1083 | if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) |
| 1084 | return -EINVAL; |
| 1085 | |
| 1086 | fse->min_width = supported_modes[fse->index].width; |
| 1087 | fse->max_width = fse->min_width; |
| 1088 | fse->min_height = supported_modes[fse->index].height; |
| 1089 | fse->max_height = fse->min_height; |
| 1090 | |
| 1091 | return 0; |
| 1092 | } |
| 1093 | |
| 1094 | static int ov2740_init_state(struct v4l2_subdev *sd, |
| 1095 | struct v4l2_subdev_state *sd_state) |
| 1096 | { |
| 1097 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 1098 | |
| 1099 | ov2740_update_pad_format(mode: &ov2740->supported_modes[0], |
| 1100 | v4l2_subdev_state_get_format(sd_state, 0)); |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | static const struct v4l2_subdev_video_ops ov2740_video_ops = { |
| 1105 | .s_stream = ov2740_set_stream, |
| 1106 | }; |
| 1107 | |
| 1108 | static const struct v4l2_subdev_pad_ops ov2740_pad_ops = { |
| 1109 | .get_fmt = v4l2_subdev_get_fmt, |
| 1110 | .set_fmt = ov2740_set_format, |
| 1111 | .enum_mbus_code = ov2740_enum_mbus_code, |
| 1112 | .enum_frame_size = ov2740_enum_frame_size, |
| 1113 | }; |
| 1114 | |
| 1115 | static const struct v4l2_subdev_ops ov2740_subdev_ops = { |
| 1116 | .video = &ov2740_video_ops, |
| 1117 | .pad = &ov2740_pad_ops, |
| 1118 | }; |
| 1119 | |
| 1120 | static const struct v4l2_subdev_internal_ops ov2740_internal_ops = { |
| 1121 | .init_state = ov2740_init_state, |
| 1122 | }; |
| 1123 | |
| 1124 | static const struct media_entity_operations ov2740_subdev_entity_ops = { |
| 1125 | .link_validate = v4l2_subdev_link_validate, |
| 1126 | }; |
| 1127 | |
| 1128 | static int ov2740_check_hwcfg(struct ov2740 *ov2740) |
| 1129 | { |
| 1130 | struct device *dev = ov2740->dev; |
| 1131 | struct fwnode_handle *ep; |
| 1132 | struct fwnode_handle *fwnode = dev_fwnode(dev); |
| 1133 | struct v4l2_fwnode_endpoint bus_cfg = { |
| 1134 | .bus_type = V4L2_MBUS_CSI2_DPHY |
| 1135 | }; |
| 1136 | int ret; |
| 1137 | unsigned int i, j; |
| 1138 | |
| 1139 | /* |
| 1140 | * Sometimes the fwnode graph is initialized by the bridge driver, |
| 1141 | * wait for this. |
| 1142 | */ |
| 1143 | ep = fwnode_graph_get_next_endpoint(fwnode, NULL); |
| 1144 | if (!ep) |
| 1145 | return dev_err_probe(dev, err: -EPROBE_DEFER, |
| 1146 | fmt: "waiting for fwnode graph endpoint\n" ); |
| 1147 | |
| 1148 | ret = v4l2_fwnode_endpoint_alloc_parse(fwnode: ep, vep: &bus_cfg); |
| 1149 | fwnode_handle_put(fwnode: ep); |
| 1150 | if (ret) |
| 1151 | return dev_err_probe(dev, err: ret, fmt: "parsing endpoint failed\n" ); |
| 1152 | |
| 1153 | if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV2740_DATA_LANES) { |
| 1154 | ret = dev_err_probe(dev, err: -EINVAL, |
| 1155 | fmt: "number of CSI2 data lanes %d is not supported\n" , |
| 1156 | bus_cfg.bus.mipi_csi2.num_data_lanes); |
| 1157 | goto check_hwcfg_error; |
| 1158 | } |
| 1159 | |
| 1160 | if (!bus_cfg.nr_of_link_frequencies) { |
| 1161 | ret = dev_err_probe(dev, err: -EINVAL, fmt: "no link frequencies defined\n" ); |
| 1162 | goto check_hwcfg_error; |
| 1163 | } |
| 1164 | |
| 1165 | for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { |
| 1166 | for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { |
| 1167 | if (link_freq_menu_items[i] == |
| 1168 | bus_cfg.link_frequencies[j]) |
| 1169 | break; |
| 1170 | } |
| 1171 | |
| 1172 | if (j == bus_cfg.nr_of_link_frequencies) |
| 1173 | continue; |
| 1174 | |
| 1175 | switch (i) { |
| 1176 | case OV2740_LINK_FREQ_360MHZ_INDEX: |
| 1177 | ov2740->supported_modes = supported_modes_360mhz; |
| 1178 | ov2740->supported_modes_count = |
| 1179 | ARRAY_SIZE(supported_modes_360mhz); |
| 1180 | break; |
| 1181 | case OV2740_LINK_FREQ_180MHZ_INDEX: |
| 1182 | ov2740->supported_modes = supported_modes_180mhz; |
| 1183 | ov2740->supported_modes_count = |
| 1184 | ARRAY_SIZE(supported_modes_180mhz); |
| 1185 | break; |
| 1186 | } |
| 1187 | |
| 1188 | break; /* Prefer modes from first available link-freq */ |
| 1189 | } |
| 1190 | |
| 1191 | if (!ov2740->supported_modes) |
| 1192 | ret = dev_err_probe(dev, err: -EINVAL, |
| 1193 | fmt: "no supported link frequencies\n" ); |
| 1194 | |
| 1195 | check_hwcfg_error: |
| 1196 | v4l2_fwnode_endpoint_free(vep: &bus_cfg); |
| 1197 | |
| 1198 | return ret; |
| 1199 | } |
| 1200 | |
| 1201 | static void ov2740_remove(struct i2c_client *client) |
| 1202 | { |
| 1203 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| 1204 | |
| 1205 | v4l2_async_unregister_subdev(sd); |
| 1206 | media_entity_cleanup(entity: &sd->entity); |
| 1207 | v4l2_subdev_cleanup(sd); |
| 1208 | v4l2_ctrl_handler_free(hdl: sd->ctrl_handler); |
| 1209 | pm_runtime_disable(dev: &client->dev); |
| 1210 | } |
| 1211 | |
| 1212 | static int ov2740_nvmem_read(void *priv, unsigned int off, void *val, |
| 1213 | size_t count) |
| 1214 | { |
| 1215 | struct nvm_data *nvm = priv; |
| 1216 | struct device *dev = regmap_get_device(map: nvm->regmap); |
| 1217 | struct ov2740 *ov2740 = to_ov2740(subdev: dev_get_drvdata(dev)); |
| 1218 | struct v4l2_subdev_state *sd_state; |
| 1219 | int ret = 0; |
| 1220 | |
| 1221 | /* Serialise sensor access */ |
| 1222 | sd_state = v4l2_subdev_lock_and_get_active_state(sd: &ov2740->sd); |
| 1223 | |
| 1224 | if (nvm->nvm_buffer) { |
| 1225 | memcpy(val, nvm->nvm_buffer + off, count); |
| 1226 | goto exit; |
| 1227 | } |
| 1228 | |
| 1229 | ret = pm_runtime_resume_and_get(dev); |
| 1230 | if (ret < 0) { |
| 1231 | goto exit; |
| 1232 | } |
| 1233 | |
| 1234 | ret = ov2740_load_otp_data(nvm); |
| 1235 | if (!ret) |
| 1236 | memcpy(val, nvm->nvm_buffer + off, count); |
| 1237 | |
| 1238 | pm_runtime_put(dev); |
| 1239 | exit: |
| 1240 | v4l2_subdev_unlock_state(state: sd_state); |
| 1241 | return ret; |
| 1242 | } |
| 1243 | |
| 1244 | static int ov2740_register_nvmem(struct i2c_client *client, |
| 1245 | struct ov2740 *ov2740) |
| 1246 | { |
| 1247 | struct nvm_data *nvm; |
| 1248 | struct regmap_config regmap_config = { }; |
| 1249 | struct nvmem_config nvmem_config = { }; |
| 1250 | struct regmap *regmap; |
| 1251 | struct device *dev = ov2740->dev; |
| 1252 | |
| 1253 | nvm = devm_kzalloc(dev, size: sizeof(*nvm), GFP_KERNEL); |
| 1254 | if (!nvm) |
| 1255 | return -ENOMEM; |
| 1256 | |
| 1257 | regmap_config.val_bits = 8; |
| 1258 | regmap_config.reg_bits = 16; |
| 1259 | regmap_config.disable_locking = true; |
| 1260 | regmap = devm_regmap_init_i2c(client, ®map_config); |
| 1261 | if (IS_ERR(ptr: regmap)) |
| 1262 | return PTR_ERR(ptr: regmap); |
| 1263 | |
| 1264 | nvm->regmap = regmap; |
| 1265 | |
| 1266 | nvmem_config.name = dev_name(dev); |
| 1267 | nvmem_config.dev = dev; |
| 1268 | nvmem_config.read_only = true; |
| 1269 | nvmem_config.root_only = true; |
| 1270 | nvmem_config.owner = THIS_MODULE; |
| 1271 | nvmem_config.compat = true; |
| 1272 | nvmem_config.base_dev = dev; |
| 1273 | nvmem_config.reg_read = ov2740_nvmem_read; |
| 1274 | nvmem_config.reg_write = NULL; |
| 1275 | nvmem_config.priv = nvm; |
| 1276 | nvmem_config.stride = 1; |
| 1277 | nvmem_config.word_size = 1; |
| 1278 | nvmem_config.size = CUSTOMER_USE_OTP_SIZE; |
| 1279 | |
| 1280 | nvm->nvmem = devm_nvmem_register(dev, cfg: &nvmem_config); |
| 1281 | if (IS_ERR(ptr: nvm->nvmem)) |
| 1282 | return PTR_ERR(ptr: nvm->nvmem); |
| 1283 | |
| 1284 | ov2740->nvm = nvm; |
| 1285 | return 0; |
| 1286 | } |
| 1287 | |
| 1288 | static int ov2740_suspend(struct device *dev) |
| 1289 | { |
| 1290 | struct v4l2_subdev *sd = dev_get_drvdata(dev); |
| 1291 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 1292 | |
| 1293 | gpiod_set_value_cansleep(desc: ov2740->reset_gpio, value: 1); |
| 1294 | gpiod_set_value_cansleep(desc: ov2740->powerdown_gpio, value: 1); |
| 1295 | clk_disable_unprepare(clk: ov2740->clk); |
| 1296 | regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name), |
| 1297 | consumers: ov2740->supplies); |
| 1298 | return 0; |
| 1299 | } |
| 1300 | |
| 1301 | static int ov2740_resume(struct device *dev) |
| 1302 | { |
| 1303 | struct v4l2_subdev *sd = dev_get_drvdata(dev); |
| 1304 | struct ov2740 *ov2740 = to_ov2740(subdev: sd); |
| 1305 | int ret; |
| 1306 | |
| 1307 | ret = regulator_bulk_enable(ARRAY_SIZE(ov2740_supply_name), |
| 1308 | consumers: ov2740->supplies); |
| 1309 | if (ret) |
| 1310 | return ret; |
| 1311 | |
| 1312 | ret = clk_prepare_enable(clk: ov2740->clk); |
| 1313 | if (ret) { |
| 1314 | regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name), |
| 1315 | consumers: ov2740->supplies); |
| 1316 | return ret; |
| 1317 | } |
| 1318 | |
| 1319 | gpiod_set_value_cansleep(desc: ov2740->powerdown_gpio, value: 0); |
| 1320 | gpiod_set_value_cansleep(desc: ov2740->reset_gpio, value: 0); |
| 1321 | msleep(msecs: 20); |
| 1322 | |
| 1323 | return 0; |
| 1324 | } |
| 1325 | |
| 1326 | static int ov2740_probe(struct i2c_client *client) |
| 1327 | { |
| 1328 | struct device *dev = &client->dev; |
| 1329 | struct ov2740 *ov2740; |
| 1330 | unsigned long freq; |
| 1331 | bool full_power; |
| 1332 | unsigned int i; |
| 1333 | int ret; |
| 1334 | |
| 1335 | ov2740 = devm_kzalloc(dev: &client->dev, size: sizeof(*ov2740), GFP_KERNEL); |
| 1336 | if (!ov2740) |
| 1337 | return -ENOMEM; |
| 1338 | |
| 1339 | ov2740->dev = &client->dev; |
| 1340 | |
| 1341 | v4l2_i2c_subdev_init(sd: &ov2740->sd, client, ops: &ov2740_subdev_ops); |
| 1342 | ov2740->sd.internal_ops = &ov2740_internal_ops; |
| 1343 | |
| 1344 | ret = ov2740_check_hwcfg(ov2740); |
| 1345 | if (ret) |
| 1346 | return ret; |
| 1347 | |
| 1348 | ov2740->reset_gpio = devm_gpiod_get_optional(dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
| 1349 | if (IS_ERR(ptr: ov2740->reset_gpio)) { |
| 1350 | return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->reset_gpio), |
| 1351 | fmt: "failed to get reset GPIO\n" ); |
| 1352 | } |
| 1353 | |
| 1354 | ov2740->powerdown_gpio = devm_gpiod_get_optional(dev, con_id: "powerdown" , flags: GPIOD_OUT_HIGH); |
| 1355 | if (IS_ERR(ptr: ov2740->powerdown_gpio)) { |
| 1356 | return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->powerdown_gpio), |
| 1357 | fmt: "failed to get powerdown GPIO\n" ); |
| 1358 | } |
| 1359 | |
| 1360 | if (ov2740->reset_gpio || ov2740->powerdown_gpio) { |
| 1361 | /* |
| 1362 | * Ensure reset/powerdown is asserted for at least 20 ms before |
| 1363 | * ov2740_resume() deasserts it. |
| 1364 | */ |
| 1365 | msleep(msecs: 20); |
| 1366 | } |
| 1367 | |
| 1368 | ov2740->clk = devm_v4l2_sensor_clk_get(dev, id: "clk" ); |
| 1369 | if (IS_ERR(ptr: ov2740->clk)) |
| 1370 | return dev_err_probe(dev, err: PTR_ERR(ptr: ov2740->clk), |
| 1371 | fmt: "failed to get clock\n" ); |
| 1372 | |
| 1373 | freq = clk_get_rate(clk: ov2740->clk); |
| 1374 | if (freq != OV2740_MCLK) |
| 1375 | return dev_err_probe(dev, err: -EINVAL, |
| 1376 | fmt: "external clock %lu is not supported\n" , |
| 1377 | freq); |
| 1378 | |
| 1379 | for (i = 0; i < ARRAY_SIZE(ov2740_supply_name); i++) |
| 1380 | ov2740->supplies[i].supply = ov2740_supply_name[i]; |
| 1381 | |
| 1382 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov2740_supply_name), |
| 1383 | consumers: ov2740->supplies); |
| 1384 | if (ret) |
| 1385 | return dev_err_probe(dev, err: ret, fmt: "failed to get regulators\n" ); |
| 1386 | |
| 1387 | full_power = acpi_dev_state_d0(dev: ov2740->dev); |
| 1388 | if (full_power) { |
| 1389 | /* ACPI does not always clear the reset GPIO / enable the clock */ |
| 1390 | ret = ov2740_resume(dev); |
| 1391 | if (ret) |
| 1392 | return dev_err_probe(dev, err: ret, fmt: "failed to power on sensor\n" ); |
| 1393 | |
| 1394 | ret = ov2740_identify_module(ov2740); |
| 1395 | if (ret) { |
| 1396 | dev_err_probe(dev, err: ret, fmt: "failed to find sensor\n" ); |
| 1397 | goto probe_error_power_off; |
| 1398 | } |
| 1399 | } |
| 1400 | |
| 1401 | ov2740->cur_mode = &ov2740->supported_modes[0]; |
| 1402 | ret = ov2740_init_controls(ov2740); |
| 1403 | if (ret) { |
| 1404 | dev_err_probe(dev, err: ret, fmt: "failed to init controls\n" ); |
| 1405 | goto probe_error_v4l2_ctrl_handler_free; |
| 1406 | } |
| 1407 | |
| 1408 | ov2740->sd.state_lock = ov2740->ctrl_handler.lock; |
| 1409 | ov2740->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; |
| 1410 | ov2740->sd.entity.ops = &ov2740_subdev_entity_ops; |
| 1411 | ov2740->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; |
| 1412 | ov2740->pad.flags = MEDIA_PAD_FL_SOURCE; |
| 1413 | ret = media_entity_pads_init(entity: &ov2740->sd.entity, num_pads: 1, pads: &ov2740->pad); |
| 1414 | if (ret) { |
| 1415 | dev_err_probe(dev, err: ret, fmt: "failed to init entity pads\n" ); |
| 1416 | goto probe_error_v4l2_ctrl_handler_free; |
| 1417 | } |
| 1418 | |
| 1419 | ret = v4l2_subdev_init_finalize(&ov2740->sd); |
| 1420 | if (ret) |
| 1421 | goto probe_error_media_entity_cleanup; |
| 1422 | |
| 1423 | /* Set the device's state to active if it's in D0 state. */ |
| 1424 | if (full_power) |
| 1425 | pm_runtime_set_active(dev: ov2740->dev); |
| 1426 | pm_runtime_enable(dev: ov2740->dev); |
| 1427 | pm_runtime_idle(dev: ov2740->dev); |
| 1428 | |
| 1429 | ret = v4l2_async_register_subdev_sensor(sd: &ov2740->sd); |
| 1430 | if (ret < 0) { |
| 1431 | dev_err_probe(dev, err: ret, fmt: "failed to register V4L2 subdev\n" ); |
| 1432 | goto probe_error_v4l2_subdev_cleanup; |
| 1433 | } |
| 1434 | |
| 1435 | ret = ov2740_register_nvmem(client, ov2740); |
| 1436 | if (ret) |
| 1437 | dev_warn(ov2740->dev, "register nvmem failed, ret %d\n" , ret); |
| 1438 | |
| 1439 | return 0; |
| 1440 | |
| 1441 | probe_error_v4l2_subdev_cleanup: |
| 1442 | pm_runtime_disable(dev: ov2740->dev); |
| 1443 | pm_runtime_set_suspended(dev: ov2740->dev); |
| 1444 | v4l2_subdev_cleanup(sd: &ov2740->sd); |
| 1445 | |
| 1446 | probe_error_media_entity_cleanup: |
| 1447 | media_entity_cleanup(entity: &ov2740->sd.entity); |
| 1448 | |
| 1449 | probe_error_v4l2_ctrl_handler_free: |
| 1450 | v4l2_ctrl_handler_free(hdl: ov2740->sd.ctrl_handler); |
| 1451 | |
| 1452 | probe_error_power_off: |
| 1453 | if (full_power) |
| 1454 | ov2740_suspend(dev); |
| 1455 | |
| 1456 | return ret; |
| 1457 | } |
| 1458 | |
| 1459 | static DEFINE_RUNTIME_DEV_PM_OPS(ov2740_pm_ops, ov2740_suspend, ov2740_resume, |
| 1460 | NULL); |
| 1461 | |
| 1462 | static const struct acpi_device_id ov2740_acpi_ids[] = { |
| 1463 | {"INT3474" }, |
| 1464 | {} |
| 1465 | }; |
| 1466 | |
| 1467 | MODULE_DEVICE_TABLE(acpi, ov2740_acpi_ids); |
| 1468 | |
| 1469 | static struct i2c_driver ov2740_i2c_driver = { |
| 1470 | .driver = { |
| 1471 | .name = "ov2740" , |
| 1472 | .acpi_match_table = ov2740_acpi_ids, |
| 1473 | .pm = pm_sleep_ptr(&ov2740_pm_ops), |
| 1474 | }, |
| 1475 | .probe = ov2740_probe, |
| 1476 | .remove = ov2740_remove, |
| 1477 | .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE, |
| 1478 | }; |
| 1479 | |
| 1480 | module_i2c_driver(ov2740_i2c_driver); |
| 1481 | |
| 1482 | MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>" ); |
| 1483 | MODULE_AUTHOR("Shawn Tu" ); |
| 1484 | MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>" ); |
| 1485 | MODULE_DESCRIPTION("OmniVision OV2740 sensor driver" ); |
| 1486 | MODULE_LICENSE("GPL v2" ); |
| 1487 | |