1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/module.h> 3 #include <linux/i2c.h> 4 #include <linux/dmi.h> 5 #include <linux/efi.h> 6 #include <linux/pci.h> 7 #include <linux/acpi.h> 8 #include <linux/clk.h> 9 #include <linux/delay.h> 10 #include <media/v4l2-subdev.h> 11 #include <linux/mfd/intel_soc_pmic.h> 12 #include <linux/regulator/consumer.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/gpio.h> 15 #include <linux/platform_device.h> 16 #include "../../include/linux/atomisp_platform.h" 17 #include "../../include/linux/atomisp_gmin_platform.h" 18 19 #define MAX_SUBDEVS 8 20 21 enum clock_rate { 22 VLV2_CLK_XTAL_25_0MHz = 0, 23 VLV2_CLK_PLL_19P2MHZ = 1 24 }; 25 26 #define CLK_RATE_19_2MHZ 19200000 27 #define CLK_RATE_25_0MHZ 25000000 28 29 /* Valid clock number range from 0 to 5 */ 30 #define MAX_CLK_COUNT 5 31 32 /* X-Powers AXP288 register set */ 33 #define ALDO1_SEL_REG 0x28 34 #define ALDO1_CTRL3_REG 0x13 35 #define ALDO1_2P8V 0x16 36 #define ALDO1_CTRL3_SHIFT 0x05 37 38 #define ELDO_CTRL_REG 0x12 39 40 #define ELDO1_SEL_REG 0x19 41 #define ELDO1_1P8V 0x16 42 #define ELDO1_CTRL_SHIFT 0x00 43 44 #define ELDO2_SEL_REG 0x1a 45 #define ELDO2_1P8V 0x16 46 #define ELDO2_CTRL_SHIFT 0x01 47 48 /* TI SND9039 PMIC register set */ 49 #define LDO9_REG 0x49 50 #define LDO10_REG 0x4a 51 #define LDO11_REG 0x4b 52 53 #define LDO_2P8V_ON 0x2f /* 0x2e selects 2.85V ... */ 54 #define LDO_2P8V_OFF 0x2e /* ... bottom bit is "enabled" */ 55 56 #define LDO_1P8V_ON 0x59 /* 0x58 selects 1.80V ... */ 57 #define LDO_1P8V_OFF 0x58 /* ... bottom bit is "enabled" */ 58 59 /* CRYSTAL COVE PMIC register set */ 60 #define CRYSTAL_1P8V_REG 0x57 61 #define CRYSTAL_2P8V_REG 0x5d 62 #define CRYSTAL_ON 0x63 63 #define CRYSTAL_OFF 0x62 64 65 struct gmin_subdev { 66 struct v4l2_subdev *subdev; 67 enum clock_rate clock_src; 68 struct clk *pmc_clk; 69 struct gpio_desc *gpio0; 70 struct gpio_desc *gpio1; 71 struct regulator *v1p8_reg; 72 struct regulator *v2p8_reg; 73 struct regulator *v1p2_reg; 74 struct regulator *v2p8_vcm_reg; 75 enum atomisp_camera_port csi_port; 76 unsigned int csi_lanes; 77 enum atomisp_input_format csi_fmt; 78 enum atomisp_bayer_order csi_bayer; 79 80 bool clock_on; 81 bool v1p8_on; 82 bool v2p8_on; 83 bool v1p2_on; 84 bool v2p8_vcm_on; 85 86 int v1p8_gpio; 87 int v2p8_gpio; 88 89 u8 pwm_i2c_addr; 90 91 /* For PMIC AXP */ 92 int eldo1_sel_reg, eldo1_1p8v, eldo1_ctrl_shift; 93 int eldo2_sel_reg, eldo2_1p8v, eldo2_ctrl_shift; 94 }; 95 96 static struct gmin_subdev gmin_subdevs[MAX_SUBDEVS]; 97 98 /* ACPI HIDs for the PMICs that could be used by this driver */ 99 #define PMIC_ACPI_AXP "INT33F4" /* XPower AXP288 PMIC */ 100 #define PMIC_ACPI_TI "INT33F5" /* Dollar Cove TI PMIC */ 101 #define PMIC_ACPI_CRYSTALCOVE "INT33FD" /* Crystal Cove PMIC */ 102 103 #define PMIC_PLATFORM_TI "intel_soc_pmic_chtdc_ti" 104 105 static enum { 106 PMIC_UNSET = 0, 107 PMIC_REGULATOR, 108 PMIC_AXP, 109 PMIC_TI, 110 PMIC_CRYSTALCOVE 111 } pmic_id; 112 113 static const char *pmic_name[] = { 114 [PMIC_UNSET] = "ACPI device PM", 115 [PMIC_REGULATOR] = "regulator driver", 116 [PMIC_AXP] = "XPower AXP288 PMIC", 117 [PMIC_TI] = "Dollar Cove TI PMIC", 118 [PMIC_CRYSTALCOVE] = "Crystal Cove PMIC", 119 }; 120 121 /* The atomisp uses type==0 for the end-of-list marker, so leave space. */ 122 static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1]; 123 124 static const struct atomisp_platform_data pdata = { 125 .subdevs = pdata_subdevs, 126 }; 127 128 static LIST_HEAD(vcm_devices); 129 static DEFINE_MUTEX(vcm_lock); 130 131 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev); 132 133 /* 134 * Legacy/stub behavior copied from upstream platform_camera.c. The 135 * atomisp driver relies on these values being non-NULL in a few 136 * places, even though they are hard-coded in all current 137 * implementations. 138 */ 139 const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void) 140 { 141 static const struct atomisp_camera_caps caps = { 142 .sensor_num = 1, 143 .sensor = { 144 { .stream_num = 1, }, 145 }, 146 }; 147 return ∩︀ 148 } 149 EXPORT_SYMBOL_GPL(atomisp_get_default_camera_caps); 150 151 const struct atomisp_platform_data *atomisp_get_platform_data(void) 152 { 153 return &pdata; 154 } 155 EXPORT_SYMBOL_GPL(atomisp_get_platform_data); 156 157 int atomisp_register_i2c_module(struct v4l2_subdev *subdev, 158 struct camera_sensor_platform_data *plat_data, 159 enum intel_v4l2_subdev_type type) 160 { 161 int i; 162 struct i2c_board_info *bi; 163 struct gmin_subdev *gs; 164 struct i2c_client *client = v4l2_get_subdevdata(subdev); 165 struct acpi_device *adev = ACPI_COMPANION(&client->dev); 166 167 dev_info(&client->dev, "register atomisp i2c module type %d\n", type); 168 169 /* The windows driver model (and thus most BIOSes by default) 170 * uses ACPI runtime power management for camera devices, but 171 * we don't. Disable it, or else the rails will be needlessly 172 * tickled during suspend/resume. This has caused power and 173 * performance issues on multiple devices. 174 */ 175 adev->power.flags.power_resources = 0; 176 177 for (i = 0; i < MAX_SUBDEVS; i++) 178 if (!pdata.subdevs[i].type) 179 break; 180 181 if (pdata.subdevs[i].type) 182 return -ENOMEM; 183 184 /* Note subtlety of initialization order: at the point where 185 * this registration API gets called, the platform data 186 * callbacks have probably already been invoked, so the 187 * gmin_subdev struct is already initialized for us. 188 */ 189 gs = find_gmin_subdev(subdev); 190 if (!gs) 191 return -ENODEV; 192 193 pdata.subdevs[i].type = type; 194 pdata.subdevs[i].port = gs->csi_port; 195 pdata.subdevs[i].subdev = subdev; 196 pdata.subdevs[i].v4l2_subdev.i2c_adapter_id = client->adapter->nr; 197 198 /* Convert i2c_client to i2c_board_info */ 199 bi = &pdata.subdevs[i].v4l2_subdev.board_info; 200 memcpy(bi->type, client->name, I2C_NAME_SIZE); 201 bi->flags = client->flags; 202 bi->addr = client->addr; 203 bi->irq = client->irq; 204 bi->platform_data = plat_data; 205 206 return 0; 207 } 208 EXPORT_SYMBOL_GPL(atomisp_register_i2c_module); 209 210 struct v4l2_subdev *atomisp_gmin_find_subdev(struct i2c_adapter *adapter, 211 struct i2c_board_info *board_info) 212 { 213 int i; 214 215 for (i = 0; i < MAX_SUBDEVS && pdata.subdevs[i].type; i++) { 216 struct intel_v4l2_subdev_table *sd = &pdata.subdevs[i]; 217 218 if (sd->v4l2_subdev.i2c_adapter_id == adapter->nr && 219 sd->v4l2_subdev.board_info.addr == board_info->addr) 220 return sd->subdev; 221 } 222 return NULL; 223 } 224 EXPORT_SYMBOL_GPL(atomisp_gmin_find_subdev); 225 226 int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd) 227 { 228 int i, j; 229 230 if (!sd) 231 return 0; 232 233 for (i = 0; i < MAX_SUBDEVS; i++) { 234 if (pdata.subdevs[i].subdev == sd) { 235 for (j = i + 1; j <= MAX_SUBDEVS; j++) 236 pdata.subdevs[j - 1] = pdata.subdevs[j]; 237 } 238 if (gmin_subdevs[i].subdev == sd) { 239 if (gmin_subdevs[i].gpio0) 240 gpiod_put(gmin_subdevs[i].gpio0); 241 gmin_subdevs[i].gpio0 = NULL; 242 if (gmin_subdevs[i].gpio1) 243 gpiod_put(gmin_subdevs[i].gpio1); 244 gmin_subdevs[i].gpio1 = NULL; 245 if (pmic_id == PMIC_REGULATOR) { 246 regulator_put(gmin_subdevs[i].v1p8_reg); 247 regulator_put(gmin_subdevs[i].v2p8_reg); 248 regulator_put(gmin_subdevs[i].v1p2_reg); 249 regulator_put(gmin_subdevs[i].v2p8_vcm_reg); 250 } 251 gmin_subdevs[i].subdev = NULL; 252 } 253 } 254 return 0; 255 } 256 EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev); 257 258 struct gmin_cfg_var { 259 const char *name, *val; 260 }; 261 262 static struct gmin_cfg_var ffrd8_vars[] = { 263 { "INTCF1B:00_ImxId", "0x134" }, 264 { "INTCF1B:00_CsiPort", "1" }, 265 { "INTCF1B:00_CsiLanes", "4" }, 266 { "INTCF1B:00_CamClk", "0" }, 267 {}, 268 }; 269 270 /* Cribbed from MCG defaults in the mt9m114 driver, not actually verified 271 * vs. T100 hardware 272 */ 273 static struct gmin_cfg_var t100_vars[] = { 274 { "INT33F0:00_CsiPort", "0" }, 275 { "INT33F0:00_CsiLanes", "1" }, 276 { "INT33F0:00_CamClk", "1" }, 277 {}, 278 }; 279 280 static struct gmin_cfg_var mrd7_vars[] = { 281 {"INT33F8:00_CamType", "1"}, 282 {"INT33F8:00_CsiPort", "1"}, 283 {"INT33F8:00_CsiLanes", "2"}, 284 {"INT33F8:00_CsiFmt", "13"}, 285 {"INT33F8:00_CsiBayer", "0"}, 286 {"INT33F8:00_CamClk", "0"}, 287 288 {"INT33F9:00_CamType", "1"}, 289 {"INT33F9:00_CsiPort", "0"}, 290 {"INT33F9:00_CsiLanes", "1"}, 291 {"INT33F9:00_CsiFmt", "13"}, 292 {"INT33F9:00_CsiBayer", "0"}, 293 {"INT33F9:00_CamClk", "1"}, 294 {}, 295 }; 296 297 static struct gmin_cfg_var ecs7_vars[] = { 298 {"INT33BE:00_CsiPort", "1"}, 299 {"INT33BE:00_CsiLanes", "2"}, 300 {"INT33BE:00_CsiFmt", "13"}, 301 {"INT33BE:00_CsiBayer", "2"}, 302 {"INT33BE:00_CamClk", "0"}, 303 304 {"INT33F0:00_CsiPort", "0"}, 305 {"INT33F0:00_CsiLanes", "1"}, 306 {"INT33F0:00_CsiFmt", "13"}, 307 {"INT33F0:00_CsiBayer", "0"}, 308 {"INT33F0:00_CamClk", "1"}, 309 {"gmin_V2P8GPIO", "402"}, 310 {}, 311 }; 312 313 static struct gmin_cfg_var i8880_vars[] = { 314 {"XXOV2680:00_CsiPort", "1"}, 315 {"XXOV2680:00_CsiLanes", "1"}, 316 {"XXOV2680:00_CamClk", "0"}, 317 318 {"XXGC0310:00_CsiPort", "0"}, 319 {"XXGC0310:00_CsiLanes", "1"}, 320 {"XXGC0310:00_CamClk", "1"}, 321 {}, 322 }; 323 324 static const struct dmi_system_id gmin_vars[] = { 325 { 326 .ident = "BYT-T FFD8", 327 .matches = { 328 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 329 }, 330 .driver_data = ffrd8_vars, 331 }, 332 { 333 .ident = "T100TA", 334 .matches = { 335 DMI_MATCH(DMI_BOARD_NAME, "T100TA"), 336 }, 337 .driver_data = t100_vars, 338 }, 339 { 340 .ident = "MRD7", 341 .matches = { 342 DMI_MATCH(DMI_BOARD_NAME, "TABLET"), 343 DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"), 344 }, 345 .driver_data = mrd7_vars, 346 }, 347 { 348 .ident = "ST70408", 349 .matches = { 350 DMI_MATCH(DMI_BOARD_NAME, "ST70408"), 351 }, 352 .driver_data = ecs7_vars, 353 }, 354 { 355 .ident = "VTA0803", 356 .matches = { 357 DMI_MATCH(DMI_BOARD_NAME, "VTA0803"), 358 }, 359 .driver_data = i8880_vars, 360 }, 361 {} 362 }; 363 364 #define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \ 365 0xa9, 0x71, 0xe8, 0x77, \ 366 0x75, 0x60, 0x68, 0xf7) 367 368 static const guid_t atomisp_dsm_guid = GUID_INIT(0xdc2f6c4f, 0x045b, 0x4f1d, 369 0x97, 0xb9, 0x88, 0x2a, 370 0x68, 0x60, 0xa4, 0xbe); 371 372 #define CFG_VAR_NAME_MAX 64 373 374 #define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */ 375 static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME]; 376 377 static struct i2c_client *gmin_i2c_dev_exists(struct device *dev, char *name, 378 struct i2c_client **client) 379 { 380 struct acpi_device *adev; 381 struct device *d; 382 383 adev = acpi_dev_get_first_match_dev(name, NULL, -1); 384 if (!adev) 385 return NULL; 386 387 d = bus_find_device_by_acpi_dev(&i2c_bus_type, adev); 388 acpi_dev_put(adev); 389 if (!d) 390 return NULL; 391 392 *client = i2c_verify_client(d); 393 put_device(d); 394 395 dev_dbg(dev, "found '%s' at address 0x%02x, adapter %d\n", 396 (*client)->name, (*client)->addr, (*client)->adapter->nr); 397 return *client; 398 } 399 400 static int gmin_i2c_write(struct device *dev, u16 i2c_addr, u8 reg, 401 u32 value, u32 mask) 402 { 403 int ret; 404 405 /* 406 * FIXME: Right now, the intel_pmic driver just write values 407 * directly at the regmap, instead of properly implementing 408 * i2c_transfer() mechanism. Let's use the same interface here, 409 * as otherwise we may face issues. 410 */ 411 412 dev_dbg(dev, 413 "I2C write, addr: 0x%02x, reg: 0x%02x, value: 0x%02x, mask: 0x%02x\n", 414 i2c_addr, reg, value, mask); 415 416 ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_addr, reg, value, mask); 417 if (ret == -EOPNOTSUPP) 418 dev_err(dev, 419 "ACPI didn't mapped the OpRegion needed to access I2C address 0x%02x.\n" 420 "Need to compile the kernel using CONFIG_*_PMIC_OPREGION settings\n", 421 i2c_addr); 422 423 return ret; 424 } 425 426 static int atomisp_get_acpi_power(struct device *dev) 427 { 428 char name[5]; 429 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 430 struct acpi_buffer b_name = { sizeof(name), name }; 431 union acpi_object *package, *element; 432 acpi_handle handle = ACPI_HANDLE(dev); 433 acpi_handle rhandle; 434 acpi_status status; 435 int clock_num = -1; 436 int i; 437 438 status = acpi_evaluate_object(handle, "_PR0", NULL, &buffer); 439 if (!ACPI_SUCCESS(status)) 440 return -1; 441 442 package = buffer.pointer; 443 444 if (!buffer.length || !package 445 || package->type != ACPI_TYPE_PACKAGE 446 || !package->package.count) 447 goto fail; 448 449 for (i = 0; i < package->package.count; i++) { 450 element = &package->package.elements[i]; 451 452 if (element->type != ACPI_TYPE_LOCAL_REFERENCE) 453 continue; 454 455 rhandle = element->reference.handle; 456 if (!rhandle) 457 goto fail; 458 459 acpi_get_name(rhandle, ACPI_SINGLE_NAME, &b_name); 460 461 dev_dbg(dev, "Found PM resource '%s'\n", name); 462 if (strlen(name) == 4 && !strncmp(name, "CLK", 3)) { 463 if (name[3] >= '0' && name[3] <= '4') 464 clock_num = name[3] - '0'; 465 #if 0 466 /* 467 * We could abort here, but let's parse all resources, 468 * as this is helpful for debugging purposes 469 */ 470 if (clock_num >= 0) 471 break; 472 #endif 473 } 474 } 475 476 fail: 477 ACPI_FREE(buffer.pointer); 478 479 return clock_num; 480 } 481 482 static u8 gmin_get_pmic_id_and_addr(struct device *dev) 483 { 484 struct i2c_client *power; 485 static u8 pmic_i2c_addr; 486 487 if (pmic_id) 488 return pmic_i2c_addr; 489 490 if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power)) 491 pmic_id = PMIC_TI; 492 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power)) 493 pmic_id = PMIC_AXP; 494 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power)) 495 pmic_id = PMIC_CRYSTALCOVE; 496 else 497 pmic_id = PMIC_REGULATOR; 498 499 pmic_i2c_addr = power ? power->addr : 0; 500 return pmic_i2c_addr; 501 } 502 503 static int gmin_detect_pmic(struct v4l2_subdev *subdev) 504 { 505 struct i2c_client *client = v4l2_get_subdevdata(subdev); 506 struct device *dev = &client->dev; 507 u8 pmic_i2c_addr; 508 509 pmic_i2c_addr = gmin_get_pmic_id_and_addr(dev); 510 dev_info(dev, "gmin: power management provided via %s (i2c addr 0x%02x)\n", 511 pmic_name[pmic_id], pmic_i2c_addr); 512 return pmic_i2c_addr; 513 } 514 515 static int gmin_subdev_add(struct gmin_subdev *gs) 516 { 517 struct i2c_client *client = v4l2_get_subdevdata(gs->subdev); 518 struct device *dev = &client->dev; 519 struct acpi_device *adev = ACPI_COMPANION(dev); 520 int ret, clock_num = -1; 521 522 dev_info(dev, "%s: ACPI path is %pfw\n", __func__, dev_fwnode(dev)); 523 524 /*WA:CHT requires XTAL clock as PLL is not stable.*/ 525 gs->clock_src = gmin_get_var_int(dev, false, "ClkSrc", 526 VLV2_CLK_PLL_19P2MHZ); 527 528 gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", 0); 529 gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1); 530 531 gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); 532 if (IS_ERR(gs->gpio0)) 533 gs->gpio0 = NULL; 534 else 535 dev_info(dev, "will handle gpio0 via ACPI\n"); 536 537 gs->gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW); 538 if (IS_ERR(gs->gpio1)) 539 gs->gpio1 = NULL; 540 else 541 dev_info(dev, "will handle gpio1 via ACPI\n"); 542 543 /* 544 * Those are used only when there is an external regulator apart 545 * from the PMIC that would be providing power supply, like on the 546 * two cases below: 547 * 548 * The ECS E7 board drives camera 2.8v from an external regulator 549 * instead of the PMIC. There's a gmin_CamV2P8 config variable 550 * that specifies the GPIO to handle this particular case, 551 * but this needs a broader architecture for handling camera power. 552 * 553 * The CHT RVP board drives camera 1.8v from an* external regulator 554 * instead of the PMIC just like ECS E7 board. 555 */ 556 557 gs->v1p8_gpio = gmin_get_var_int(dev, true, "V1P8GPIO", -1); 558 gs->v2p8_gpio = gmin_get_var_int(dev, true, "V2P8GPIO", -1); 559 560 /* 561 * FIXME: 562 * 563 * The ACPI handling code checks for the _PR? tables in order to 564 * know what is required to switch the device from power state 565 * D0 (_PR0) up to D3COLD (_PR3). 566 * 567 * The adev->flags.power_manageable is set to true if the device 568 * has a _PR0 table, which can be checked by calling 569 * acpi_device_power_manageable(adev). 570 * 571 * However, this only says that the device can be set to power off 572 * mode. 573 * 574 * At least on the DSDT tables we've seen so far, there's no _PR3, 575 * nor _PS3 (which would have a somewhat similar effect). 576 * So, using ACPI for power management won't work, except if adding 577 * an ACPI override logic somewhere. 578 * 579 * So, at least for the existing devices we know, the check below 580 * will always be false. 581 */ 582 if (acpi_device_can_wakeup(adev) && 583 acpi_device_can_poweroff(adev)) { 584 dev_info(dev, 585 "gmin: power management provided via device PM\n"); 586 return 0; 587 } 588 589 /* 590 * The code below is here due to backward compatibility with devices 591 * whose ACPI BIOS may not contain everything that would be needed 592 * in order to set clocks and do power management. 593 */ 594 595 /* 596 * According with : 597 * https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md 598 * 599 * The "CamClk" EFI var is set via fastboot on some Android devices, 600 * and seems to contain the number of the clock used to feed the 601 * sensor. 602 * 603 * On systems with a proper ACPI table, this is given via the _PR0 604 * power resource table. The logic below should first check if there 605 * is a power resource already, falling back to the EFI vars detection 606 * otherwise. 607 */ 608 609 /* Try first to use ACPI to get the clock resource */ 610 if (acpi_device_power_manageable(adev)) 611 clock_num = atomisp_get_acpi_power(dev); 612 613 /* Fall-back use EFI and/or DMI match */ 614 if (clock_num < 0) 615 clock_num = gmin_get_var_int(dev, false, "CamClk", 0); 616 617 if (clock_num < 0 || clock_num > MAX_CLK_COUNT) { 618 dev_err(dev, "Invalid clock number\n"); 619 return -EINVAL; 620 } 621 622 snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name), 623 "%s_%d", "pmc_plt_clk", clock_num); 624 625 gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name); 626 if (IS_ERR(gs->pmc_clk)) { 627 ret = PTR_ERR(gs->pmc_clk); 628 dev_err(dev, "Failed to get clk from %s: %d\n", gmin_pmc_clk_name, ret); 629 return ret; 630 } 631 dev_info(dev, "Will use CLK%d (%s)\n", clock_num, gmin_pmc_clk_name); 632 633 /* 634 * The firmware might enable the clock at 635 * boot (this information may or may not 636 * be reflected in the enable clock register). 637 * To change the rate we must disable the clock 638 * first to cover these cases. Due to common 639 * clock framework restrictions that do not allow 640 * to disable a clock that has not been enabled, 641 * we need to enable the clock first. 642 */ 643 ret = clk_prepare_enable(gs->pmc_clk); 644 if (!ret) 645 clk_disable_unprepare(gs->pmc_clk); 646 647 switch (pmic_id) { 648 case PMIC_REGULATOR: 649 gs->v1p8_reg = regulator_get(dev, "V1P8SX"); 650 gs->v2p8_reg = regulator_get(dev, "V2P8SX"); 651 652 gs->v1p2_reg = regulator_get(dev, "V1P2A"); 653 gs->v2p8_vcm_reg = regulator_get(dev, "VPROG4B"); 654 655 /* Note: ideally we would initialize v[12]p8_on to the 656 * output of regulator_is_enabled(), but sadly that 657 * API is broken with the current drivers, returning 658 * "1" for a regulator that will then emit a 659 * "unbalanced disable" WARNing if we try to disable 660 * it. 661 */ 662 break; 663 664 case PMIC_AXP: 665 gs->eldo1_1p8v = gmin_get_var_int(dev, false, 666 "eldo1_1p8v", 667 ELDO1_1P8V); 668 gs->eldo1_sel_reg = gmin_get_var_int(dev, false, 669 "eldo1_sel_reg", 670 ELDO1_SEL_REG); 671 gs->eldo1_ctrl_shift = gmin_get_var_int(dev, false, 672 "eldo1_ctrl_shift", 673 ELDO1_CTRL_SHIFT); 674 gs->eldo2_1p8v = gmin_get_var_int(dev, false, 675 "eldo2_1p8v", 676 ELDO2_1P8V); 677 gs->eldo2_sel_reg = gmin_get_var_int(dev, false, 678 "eldo2_sel_reg", 679 ELDO2_SEL_REG); 680 gs->eldo2_ctrl_shift = gmin_get_var_int(dev, false, 681 "eldo2_ctrl_shift", 682 ELDO2_CTRL_SHIFT); 683 break; 684 685 default: 686 break; 687 } 688 689 return 0; 690 } 691 692 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev) 693 { 694 int i; 695 696 for (i = 0; i < MAX_SUBDEVS; i++) 697 if (gmin_subdevs[i].subdev == subdev) 698 return &gmin_subdevs[i]; 699 return NULL; 700 } 701 702 static struct gmin_subdev *find_free_gmin_subdev_slot(void) 703 { 704 unsigned int i; 705 706 for (i = 0; i < MAX_SUBDEVS; i++) 707 if (gmin_subdevs[i].subdev == NULL) 708 return &gmin_subdevs[i]; 709 return NULL; 710 } 711 712 static int axp_regulator_set(struct device *dev, struct gmin_subdev *gs, 713 int sel_reg, u8 setting, 714 int ctrl_reg, int shift, bool on) 715 { 716 int ret; 717 int val; 718 719 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, setting, 0xff); 720 if (ret) 721 return ret; 722 723 val = on ? 1 << shift : 0; 724 725 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, val, 1 << shift); 726 if (ret) 727 return ret; 728 729 return 0; 730 } 731 732 static int axp_v1p8_on(struct device *dev, struct gmin_subdev *gs) 733 { 734 int ret; 735 736 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 737 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, true); 738 if (ret) 739 return ret; 740 741 /* 742 * This sleep comes out of the gc2235 driver, which is the 743 * only one I currently see that wants to set both 1.8v rails. 744 */ 745 usleep_range(110, 150); 746 747 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p8v, 748 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, true); 749 if (ret) 750 return ret; 751 752 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 753 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false); 754 return ret; 755 } 756 757 static int axp_v1p8_off(struct device *dev, struct gmin_subdev *gs) 758 { 759 int ret; 760 761 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p8v, 762 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, false); 763 if (ret) 764 return ret; 765 766 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 767 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false); 768 return ret; 769 } 770 771 static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on) 772 { 773 struct gmin_subdev *gs = find_gmin_subdev(subdev); 774 775 if (gs) { 776 gpiod_set_value(gs->gpio0, on); 777 return 0; 778 } 779 return -EINVAL; 780 } 781 782 static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on) 783 { 784 struct gmin_subdev *gs = find_gmin_subdev(subdev); 785 786 if (gs) { 787 gpiod_set_value(gs->gpio1, on); 788 return 0; 789 } 790 return -EINVAL; 791 } 792 793 static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on) 794 { 795 struct gmin_subdev *gs = find_gmin_subdev(subdev); 796 797 if (!gs || gs->v1p2_on == on) 798 return 0; 799 gs->v1p2_on = on; 800 801 /* use regulator for PMIC */ 802 if (gs->v1p2_reg) { 803 if (on) 804 return regulator_enable(gs->v1p2_reg); 805 else 806 return regulator_disable(gs->v1p2_reg); 807 } 808 809 /* TODO:v1p2 may need to extend to other PMICs */ 810 811 return -EINVAL; 812 } 813 814 static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on) 815 { 816 struct gmin_subdev *gs = find_gmin_subdev(subdev); 817 int ret; 818 int value; 819 820 if (gs->v1p8_gpio >= 0) { 821 pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n", 822 gs->v1p8_gpio); 823 ret = gpio_request(gs->v1p8_gpio, "camera_v1p8_en"); 824 if (!ret) 825 ret = gpio_direction_output(gs->v1p8_gpio, 0); 826 if (ret) 827 pr_err("V1P8 GPIO initialization failed\n"); 828 } 829 830 if (!gs || gs->v1p8_on == on) 831 return 0; 832 gs->v1p8_on = on; 833 834 if (gs->v1p8_gpio >= 0) 835 gpio_set_value(gs->v1p8_gpio, on); 836 837 if (gs->v1p8_reg) { 838 regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000); 839 if (on) 840 return regulator_enable(gs->v1p8_reg); 841 else 842 return regulator_disable(gs->v1p8_reg); 843 } 844 845 switch (pmic_id) { 846 case PMIC_AXP: 847 if (on) 848 return axp_v1p8_on(subdev->dev, gs); 849 else 850 return axp_v1p8_off(subdev->dev, gs); 851 case PMIC_TI: 852 value = on ? LDO_1P8V_ON : LDO_1P8V_OFF; 853 854 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 855 LDO10_REG, value, 0xff); 856 case PMIC_CRYSTALCOVE: 857 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 858 859 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 860 CRYSTAL_1P8V_REG, value, 0xff); 861 default: 862 dev_err(subdev->dev, "Couldn't set power mode for v1p2\n"); 863 } 864 865 return -EINVAL; 866 } 867 868 static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on) 869 { 870 struct gmin_subdev *gs = find_gmin_subdev(subdev); 871 int ret; 872 int value; 873 874 if (gs->v2p8_gpio >= 0) { 875 pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n", 876 gs->v2p8_gpio); 877 ret = gpio_request(gs->v2p8_gpio, "camera_v2p8"); 878 if (!ret) 879 ret = gpio_direction_output(gs->v2p8_gpio, 0); 880 if (ret) 881 pr_err("V2P8 GPIO initialization failed\n"); 882 } 883 884 if (!gs || gs->v2p8_on == on) 885 return 0; 886 gs->v2p8_on = on; 887 888 if (gs->v2p8_gpio >= 0) 889 gpio_set_value(gs->v2p8_gpio, on); 890 891 if (gs->v2p8_reg) { 892 regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000); 893 if (on) 894 return regulator_enable(gs->v2p8_reg); 895 else 896 return regulator_disable(gs->v2p8_reg); 897 } 898 899 switch (pmic_id) { 900 case PMIC_AXP: 901 return axp_regulator_set(subdev->dev, gs, ALDO1_SEL_REG, 902 ALDO1_2P8V, ALDO1_CTRL3_REG, 903 ALDO1_CTRL3_SHIFT, on); 904 case PMIC_TI: 905 value = on ? LDO_2P8V_ON : LDO_2P8V_OFF; 906 907 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 908 LDO9_REG, value, 0xff); 909 case PMIC_CRYSTALCOVE: 910 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 911 912 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 913 CRYSTAL_2P8V_REG, value, 0xff); 914 default: 915 dev_err(subdev->dev, "Couldn't set power mode for v1p2\n"); 916 } 917 918 return -EINVAL; 919 } 920 921 static int gmin_acpi_pm_ctrl(struct v4l2_subdev *subdev, int on) 922 { 923 int ret = 0; 924 struct gmin_subdev *gs = find_gmin_subdev(subdev); 925 struct i2c_client *client = v4l2_get_subdevdata(subdev); 926 struct acpi_device *adev = ACPI_COMPANION(&client->dev); 927 928 /* Use the ACPI power management to control it */ 929 on = !!on; 930 if (gs->clock_on == on) 931 return 0; 932 933 dev_dbg(subdev->dev, "Setting power state to %s\n", 934 on ? "on" : "off"); 935 936 if (on) 937 ret = acpi_device_set_power(adev, 938 ACPI_STATE_D0); 939 else 940 ret = acpi_device_set_power(adev, 941 ACPI_STATE_D3_COLD); 942 943 if (!ret) 944 gs->clock_on = on; 945 else 946 dev_err(subdev->dev, "Couldn't set power state to %s\n", 947 on ? "on" : "off"); 948 949 return ret; 950 } 951 952 static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on) 953 { 954 int ret = 0; 955 struct gmin_subdev *gs = find_gmin_subdev(subdev); 956 struct i2c_client *client = v4l2_get_subdevdata(subdev); 957 958 if (gs->clock_on == !!on) 959 return 0; 960 961 if (on) { 962 ret = clk_set_rate(gs->pmc_clk, 963 gs->clock_src ? CLK_RATE_19_2MHZ : CLK_RATE_25_0MHZ); 964 965 if (ret) 966 dev_err(&client->dev, "unable to set PMC rate %d\n", 967 gs->clock_src); 968 969 ret = clk_prepare_enable(gs->pmc_clk); 970 if (ret == 0) 971 gs->clock_on = true; 972 } else { 973 clk_disable_unprepare(gs->pmc_clk); 974 gs->clock_on = false; 975 } 976 977 return ret; 978 } 979 980 static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag) 981 { 982 struct i2c_client *client = v4l2_get_subdevdata(sd); 983 struct gmin_subdev *gs = find_gmin_subdev(sd); 984 985 if (!client || !gs) 986 return -ENODEV; 987 988 return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes, 989 gs->csi_fmt, gs->csi_bayer, flag); 990 } 991 992 static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev, 993 char *camera_module) 994 { 995 struct i2c_client *client = v4l2_get_subdevdata(subdev); 996 struct gmin_subdev *gs = find_gmin_subdev(subdev); 997 struct camera_vcm_control *vcm; 998 999 if (!client || !gs) 1000 return NULL; 1001 1002 if (!camera_module) 1003 return NULL; 1004 1005 mutex_lock(&vcm_lock); 1006 list_for_each_entry(vcm, &vcm_devices, list) { 1007 if (!strcmp(camera_module, vcm->camera_module)) { 1008 mutex_unlock(&vcm_lock); 1009 return vcm; 1010 } 1011 } 1012 1013 mutex_unlock(&vcm_lock); 1014 return NULL; 1015 } 1016 1017 static struct camera_sensor_platform_data pmic_gmin_plat = { 1018 .gpio0_ctrl = gmin_gpio0_ctrl, 1019 .gpio1_ctrl = gmin_gpio1_ctrl, 1020 .v1p8_ctrl = gmin_v1p8_ctrl, 1021 .v2p8_ctrl = gmin_v2p8_ctrl, 1022 .v1p2_ctrl = gmin_v1p2_ctrl, 1023 .flisclk_ctrl = gmin_flisclk_ctrl, 1024 .csi_cfg = gmin_csi_cfg, 1025 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1026 }; 1027 1028 static struct camera_sensor_platform_data acpi_gmin_plat = { 1029 .gpio0_ctrl = gmin_gpio0_ctrl, 1030 .gpio1_ctrl = gmin_gpio1_ctrl, 1031 .v1p8_ctrl = gmin_acpi_pm_ctrl, 1032 .v2p8_ctrl = gmin_acpi_pm_ctrl, 1033 .v1p2_ctrl = gmin_acpi_pm_ctrl, 1034 .flisclk_ctrl = gmin_acpi_pm_ctrl, 1035 .csi_cfg = gmin_csi_cfg, 1036 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1037 }; 1038 1039 struct camera_sensor_platform_data *gmin_camera_platform_data( 1040 struct v4l2_subdev *subdev, 1041 enum atomisp_input_format csi_format, 1042 enum atomisp_bayer_order csi_bayer) 1043 { 1044 u8 pmic_i2c_addr = gmin_detect_pmic(subdev); 1045 struct gmin_subdev *gs; 1046 1047 gs = find_free_gmin_subdev_slot(); 1048 gs->subdev = subdev; 1049 gs->csi_fmt = csi_format; 1050 gs->csi_bayer = csi_bayer; 1051 gs->pwm_i2c_addr = pmic_i2c_addr; 1052 1053 gmin_subdev_add(gs); 1054 if (gs->pmc_clk) 1055 return &pmic_gmin_plat; 1056 else 1057 return &acpi_gmin_plat; 1058 } 1059 EXPORT_SYMBOL_GPL(gmin_camera_platform_data); 1060 1061 int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl) 1062 { 1063 if (!vcmCtrl) 1064 return -EINVAL; 1065 1066 mutex_lock(&vcm_lock); 1067 list_add_tail(&vcmCtrl->list, &vcm_devices); 1068 mutex_unlock(&vcm_lock); 1069 1070 return 0; 1071 } 1072 EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control); 1073 1074 static int gmin_get_hardcoded_var(struct device *dev, 1075 struct gmin_cfg_var *varlist, 1076 const char *var8, char *out, size_t *out_len) 1077 { 1078 struct gmin_cfg_var *gv; 1079 1080 for (gv = varlist; gv->name; gv++) { 1081 size_t vl; 1082 1083 if (strcmp(var8, gv->name)) 1084 continue; 1085 1086 dev_info(dev, "Found DMI entry for '%s'\n", var8); 1087 1088 vl = strlen(gv->val); 1089 if (vl > *out_len - 1) 1090 return -ENOSPC; 1091 1092 strscpy(out, gv->val, *out_len); 1093 *out_len = vl; 1094 return 0; 1095 } 1096 1097 return -EINVAL; 1098 } 1099 1100 1101 static int gmin_get_config_dsm_var(struct device *dev, 1102 const char *var, 1103 char *out, size_t *out_len) 1104 { 1105 acpi_handle handle = ACPI_HANDLE(dev); 1106 union acpi_object *obj, *cur = NULL; 1107 int i; 1108 1109 /* 1110 * The data reported by "CamClk" seems to be either 0 or 1 at the 1111 * _DSM table. 1112 * 1113 * At the ACPI tables we looked so far, this is not related to the 1114 * actual clock source for the sensor, which is given by the 1115 * _PR0 ACPI table. So, ignore it, as otherwise this will be 1116 * set to a wrong value. 1117 */ 1118 if (!strcmp(var, "CamClk")) 1119 return -EINVAL; 1120 1121 obj = acpi_evaluate_dsm(handle, &atomisp_dsm_guid, 0, 0, NULL); 1122 if (!obj) { 1123 dev_info_once(dev, "Didn't find ACPI _DSM table.\n"); 1124 return -EINVAL; 1125 } 1126 1127 /* Return on unexpected object type */ 1128 if (obj->type != ACPI_TYPE_PACKAGE) 1129 return -EINVAL; 1130 1131 #if 0 /* Just for debugging purposes */ 1132 for (i = 0; i < obj->package.count; i++) { 1133 union acpi_object *cur = &obj->package.elements[i]; 1134 1135 if (cur->type == ACPI_TYPE_INTEGER) 1136 dev_info(dev, "object #%d, type %d, value: %lld\n", 1137 i, cur->type, cur->integer.value); 1138 else if (cur->type == ACPI_TYPE_STRING) 1139 dev_info(dev, "object #%d, type %d, string: %s\n", 1140 i, cur->type, cur->string.pointer); 1141 else 1142 dev_info(dev, "object #%d, type %d\n", 1143 i, cur->type); 1144 } 1145 #endif 1146 1147 /* Seek for the desired var */ 1148 for (i = 0; i < obj->package.count - 1; i += 2) { 1149 if (obj->package.elements[i].type == ACPI_TYPE_STRING && 1150 !strcmp(obj->package.elements[i].string.pointer, var)) { 1151 /* Next element should be the required value */ 1152 cur = &obj->package.elements[i + 1]; 1153 break; 1154 } 1155 } 1156 1157 if (!cur) { 1158 dev_info(dev, "didn't found _DSM entry for '%s'\n", var); 1159 ACPI_FREE(obj); 1160 return -EINVAL; 1161 } 1162 1163 /* 1164 * While it could be possible to have an ACPI_TYPE_INTEGER, 1165 * and read the value from cur->integer.value, the table 1166 * seen so far uses the string type. So, produce a warning 1167 * if it founds something different than string, letting it 1168 * to fall back to the old code. 1169 */ 1170 if (cur && cur->type != ACPI_TYPE_STRING) { 1171 dev_info(dev, "found non-string _DSM entry for '%s'\n", var); 1172 ACPI_FREE(obj); 1173 return -EINVAL; 1174 } 1175 1176 dev_info(dev, "found _DSM entry for '%s': %s\n", var, 1177 cur->string.pointer); 1178 strscpy(out, cur->string.pointer, *out_len); 1179 *out_len = strlen(cur->string.pointer); 1180 1181 ACPI_FREE(obj); 1182 return 0; 1183 } 1184 1185 /* Retrieves a device-specific configuration variable. The dev 1186 * argument should be a device with an ACPI companion, as all 1187 * configuration is based on firmware ID. 1188 */ 1189 static int gmin_get_config_var(struct device *maindev, 1190 bool is_gmin, 1191 const char *var, 1192 char *out, size_t *out_len) 1193 { 1194 efi_char16_t var16[CFG_VAR_NAME_MAX]; 1195 const struct dmi_system_id *id; 1196 struct device *dev = maindev; 1197 char var8[CFG_VAR_NAME_MAX]; 1198 struct efivar_entry *ev; 1199 int i, ret; 1200 1201 /* For sensors, try first to use the _DSM table */ 1202 if (!is_gmin) { 1203 ret = gmin_get_config_dsm_var(maindev, var, out, out_len); 1204 if (!ret) 1205 return 0; 1206 } 1207 1208 /* Fall-back to other approaches */ 1209 1210 if (!is_gmin && ACPI_COMPANION(dev)) 1211 dev = &ACPI_COMPANION(dev)->dev; 1212 1213 if (!is_gmin) 1214 ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var); 1215 else 1216 ret = snprintf(var8, sizeof(var8), "gmin_%s", var); 1217 1218 if (ret < 0 || ret >= sizeof(var8) - 1) 1219 return -EINVAL; 1220 1221 /* First check a hard-coded list of board-specific variables. 1222 * Some device firmwares lack the ability to set EFI variables at 1223 * runtime. 1224 */ 1225 id = dmi_first_match(gmin_vars); 1226 if (id) { 1227 ret = gmin_get_hardcoded_var(maindev, id->driver_data, var8, 1228 out, out_len); 1229 if (!ret) 1230 return 0; 1231 } 1232 1233 /* Our variable names are ASCII by construction, but EFI names 1234 * are wide chars. Convert and zero-pad. 1235 */ 1236 memset(var16, 0, sizeof(var16)); 1237 for (i = 0; i < sizeof(var8) && var8[i]; i++) 1238 var16[i] = var8[i]; 1239 1240 /* Not sure this API usage is kosher; efivar_entry_get()'s 1241 * implementation simply uses VariableName and VendorGuid from 1242 * the struct and ignores the rest, but it seems like there 1243 * ought to be an "official" efivar_entry registered 1244 * somewhere? 1245 */ 1246 ev = kzalloc(sizeof(*ev), GFP_KERNEL); 1247 if (!ev) 1248 return -ENOMEM; 1249 memcpy(&ev->var.VariableName, var16, sizeof(var16)); 1250 ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID; 1251 ev->var.DataSize = *out_len; 1252 1253 ret = efivar_entry_get(ev, &ev->var.Attributes, 1254 &ev->var.DataSize, ev->var.Data); 1255 if (ret == 0) { 1256 memcpy(out, ev->var.Data, ev->var.DataSize); 1257 *out_len = ev->var.DataSize; 1258 dev_info(maindev, "found EFI entry for '%s'\n", var8); 1259 } else if (is_gmin) { 1260 dev_info(maindev, "Failed to find EFI gmin variable %s\n", var8); 1261 } else { 1262 dev_info(maindev, "Failed to find EFI variable %s\n", var8); 1263 } 1264 1265 kfree(ev); 1266 1267 return ret; 1268 } 1269 1270 int gmin_get_var_int(struct device *dev, bool is_gmin, const char *var, int def) 1271 { 1272 char val[CFG_VAR_NAME_MAX]; 1273 size_t len = sizeof(val); 1274 long result; 1275 int ret; 1276 1277 ret = gmin_get_config_var(dev, is_gmin, var, val, &len); 1278 if (!ret) { 1279 val[len] = 0; 1280 ret = kstrtol(val, 0, &result); 1281 } else { 1282 dev_info(dev, "%s: using default (%d)\n", var, def); 1283 } 1284 1285 return ret ? def : result; 1286 } 1287 EXPORT_SYMBOL_GPL(gmin_get_var_int); 1288 1289 int camera_sensor_csi(struct v4l2_subdev *sd, u32 port, 1290 u32 lanes, u32 format, u32 bayer_order, int flag) 1291 { 1292 struct i2c_client *client = v4l2_get_subdevdata(sd); 1293 struct camera_mipi_info *csi = NULL; 1294 1295 if (flag) { 1296 csi = kzalloc(sizeof(*csi), GFP_KERNEL); 1297 if (!csi) 1298 return -ENOMEM; 1299 csi->port = port; 1300 csi->num_lanes = lanes; 1301 csi->input_format = format; 1302 csi->raw_bayer_order = bayer_order; 1303 v4l2_set_subdev_hostdata(sd, (void *)csi); 1304 csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED; 1305 csi->metadata_effective_width = NULL; 1306 dev_info(&client->dev, 1307 "camera pdata: port: %d lanes: %d order: %8.8x\n", 1308 port, lanes, bayer_order); 1309 } else { 1310 csi = v4l2_get_subdev_hostdata(sd); 1311 kfree(csi); 1312 } 1313 1314 return 0; 1315 } 1316 EXPORT_SYMBOL_GPL(camera_sensor_csi); 1317 1318 /* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't 1319 * work. Disable so the kernel framework doesn't hang the device 1320 * trying. The driver itself does direct calls to the PUNIT to manage 1321 * ISP power. 1322 */ 1323 static void isp_pm_cap_fixup(struct pci_dev *pdev) 1324 { 1325 dev_info(&pdev->dev, "Disabling PCI power management on camera ISP\n"); 1326 pdev->pm_cap = 0; 1327 } 1328 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup); 1329 1330 MODULE_DESCRIPTION("Ancillary routines for binding ACPI devices"); 1331 MODULE_LICENSE("GPL"); 1332