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, 417 value, mask); 418 419 if (ret == -EOPNOTSUPP) { 420 dev_err(dev, 421 "ACPI didn't mapped the OpRegion needed to access I2C address 0x%02x.\n" 422 "Need to compile the Kernel using CONFIG_*_PMIC_OPREGION settings\n", 423 i2c_addr); 424 return ret; 425 } 426 427 return ret; 428 } 429 430 static int atomisp_get_acpi_power(struct device *dev, acpi_handle handle) 431 { 432 char name[5]; 433 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 434 struct acpi_buffer b_name = { sizeof(name), name }; 435 union acpi_object *package, *element; 436 acpi_handle rhandle; 437 acpi_status status; 438 int clock_num = -1; 439 int i; 440 441 status = acpi_evaluate_object(handle, "_PR0", NULL, &buffer); 442 if (!ACPI_SUCCESS(status)) 443 return -1; 444 445 package = buffer.pointer; 446 447 if (!buffer.length || !package 448 || package->type != ACPI_TYPE_PACKAGE 449 || !package->package.count) 450 goto fail; 451 452 for (i = 0; i < package->package.count; i++) { 453 element = &package->package.elements[i]; 454 455 if (element->type != ACPI_TYPE_LOCAL_REFERENCE) 456 continue; 457 458 rhandle = element->reference.handle; 459 if (!rhandle) 460 goto fail; 461 462 acpi_get_name(rhandle, ACPI_SINGLE_NAME, &b_name); 463 464 dev_dbg(dev, "Found PM resource '%s'\n", name); 465 if (strlen(name) == 4 && !strncmp(name, "CLK", 3)) { 466 if (name[3] >= '0' && name[3] <= '4') 467 clock_num = name[3] - '0'; 468 #if 0 469 /* 470 * We could abort here, but let's parse all resources, 471 * as this is helpful for debugging purposes 472 */ 473 if (clock_num >= 0) 474 break; 475 #endif 476 } 477 } 478 479 fail: 480 ACPI_FREE(buffer.pointer); 481 482 return clock_num; 483 } 484 485 static struct i2c_client *power; 486 487 static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev) 488 { 489 struct i2c_client *client = v4l2_get_subdevdata(subdev); 490 struct acpi_device *adev; 491 struct gmin_subdev *gs; 492 acpi_handle handle; 493 struct device *dev; 494 int i, ret, clock_num = -1; 495 496 if (!client) 497 return NULL; 498 499 dev = &client->dev; 500 501 handle = ACPI_HANDLE(dev); 502 adev = ACPI_COMPANION(&client->dev); 503 504 dev_info(&client->dev, "%s: ACPI detected it on bus ID=%s, HID=%s\n", 505 __func__, acpi_device_bid(adev), acpi_device_hid(adev)); 506 507 for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++) 508 ; 509 if (i >= MAX_SUBDEVS) 510 return NULL; 511 512 gs = &gmin_subdevs[i]; 513 gs->subdev = subdev; 514 515 /*WA:CHT requires XTAL clock as PLL is not stable.*/ 516 gmin_subdevs[i].clock_src = gmin_get_var_int(dev, false, "ClkSrc", 517 VLV2_CLK_PLL_19P2MHZ); 518 519 gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", 0); 520 gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1); 521 522 gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); 523 if (IS_ERR(gs->gpio0)) 524 gs->gpio0 = NULL; 525 else 526 dev_info(dev, "will handle gpio0 via ACPI\n"); 527 528 gs->gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW); 529 if (IS_ERR(gs->gpio1)) 530 gs->gpio1 = NULL; 531 else 532 dev_info(dev, "will handle gpio1 via ACPI\n"); 533 534 /* 535 * Those are used only when there is an external regulator apart 536 * from the PMIC that would be providing power supply, like on the 537 * two cases below: 538 * 539 * The ECS E7 board drives camera 2.8v from an external regulator 540 * instead of the PMIC. There's a gmin_CamV2P8 config variable 541 * that specifies the GPIO to handle this particular case, 542 * but this needs a broader architecture for handling camera power. 543 * 544 * The CHT RVP board drives camera 1.8v from an* external regulator 545 * instead of the PMIC just like ECS E7 board. 546 */ 547 548 gs->v1p8_gpio = gmin_get_var_int(dev, true, "V1P8GPIO", -1); 549 gs->v2p8_gpio = gmin_get_var_int(dev, true, "V2P8GPIO", -1); 550 551 /* 552 * FIXME: 553 * 554 * The ACPI handling code checks for the _PR? tables in order to 555 * know what is required to switch the device from power state 556 * D0 (_PR0) up to D3COLD (_PR3). 557 * 558 * The adev->flags.power_manageable is set to true if the device 559 * has a _PR0 table, which can be checked by calling 560 * acpi_device_power_manageable(adev). 561 * 562 * However, this only says that the device can be set to power off 563 * mode. 564 * 565 * At least on the DSDT tables we've seen so far, there's no _PR3, 566 * nor _PS3 (which would have a somewhat similar effect). 567 * So, using ACPI for power management won't work, except if adding 568 * an ACPI override logic somewhere. 569 * 570 * So, at least for the existing devices we know, the check below 571 * will always be false. 572 */ 573 if (acpi_device_can_wakeup(adev) && 574 acpi_device_can_poweroff(adev)) { 575 dev_info(dev, 576 "gmin: power management provided via device PM\n"); 577 578 return gs; 579 } 580 581 /* 582 * The code below is here due to backward compatibility with devices 583 * whose ACPI BIOS may not contain everything that would be needed 584 * in order to set clocks and do power management. 585 */ 586 587 if (!pmic_id) { 588 if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power)) 589 pmic_id = PMIC_TI; 590 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power)) 591 pmic_id = PMIC_AXP; 592 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power)) 593 pmic_id = PMIC_CRYSTALCOVE; 594 else 595 pmic_id = PMIC_REGULATOR; 596 } 597 598 if (power) { 599 gs->pwm_i2c_addr = power->addr; 600 dev_info(dev, 601 "gmin: power management provided via %s (i2c addr 0x%02x)\n", 602 pmic_name[pmic_id], power->addr); 603 } else { 604 dev_info(dev, "gmin: power management provided via %s\n", 605 pmic_name[pmic_id]); 606 } 607 608 /* 609 * According with : 610 * https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md 611 * 612 * The "CamClk" EFI var is set via fastboot on some Android devices, 613 * and seems to contain the number of the clock used to feed the 614 * sensor. 615 * 616 * On systems with a proper ACPI table, this is given via the _PR0 617 * power resource table. The logic below should first check if there 618 * is a power resource already, falling back to the EFI vars detection 619 * otherwise. 620 */ 621 622 /* Try first to use ACPI to get the clock resource */ 623 if (acpi_device_power_manageable(adev)) 624 clock_num = atomisp_get_acpi_power(dev, handle); 625 626 /* Fall-back use EFI and/or DMI match */ 627 if (clock_num < 0) 628 clock_num = gmin_get_var_int(dev, false, "CamClk", 0); 629 630 if (clock_num < 0 || clock_num > MAX_CLK_COUNT) { 631 dev_err(dev, "Invalid clock number\n"); 632 return NULL; 633 } 634 635 snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name), 636 "%s_%d", "pmc_plt_clk", clock_num); 637 638 gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name); 639 if (IS_ERR(gs->pmc_clk)) { 640 ret = PTR_ERR(gs->pmc_clk); 641 642 dev_err(dev, 643 "Failed to get clk from %s : %d\n", 644 gmin_pmc_clk_name, 645 ret); 646 647 return NULL; 648 } 649 dev_info(dev, "Will use CLK%d (%s)\n", clock_num, gmin_pmc_clk_name); 650 651 /* 652 * The firmware might enable the clock at 653 * boot (this information may or may not 654 * be reflected in the enable clock register). 655 * To change the rate we must disable the clock 656 * first to cover these cases. Due to common 657 * clock framework restrictions that do not allow 658 * to disable a clock that has not been enabled, 659 * we need to enable the clock first. 660 */ 661 ret = clk_prepare_enable(gs->pmc_clk); 662 if (!ret) 663 clk_disable_unprepare(gs->pmc_clk); 664 665 switch (pmic_id) { 666 case PMIC_REGULATOR: 667 gs->v1p8_reg = regulator_get(dev, "V1P8SX"); 668 gs->v2p8_reg = regulator_get(dev, "V2P8SX"); 669 670 gs->v1p2_reg = regulator_get(dev, "V1P2A"); 671 gs->v2p8_vcm_reg = regulator_get(dev, "VPROG4B"); 672 673 /* Note: ideally we would initialize v[12]p8_on to the 674 * output of regulator_is_enabled(), but sadly that 675 * API is broken with the current drivers, returning 676 * "1" for a regulator that will then emit a 677 * "unbalanced disable" WARNing if we try to disable 678 * it. 679 */ 680 break; 681 682 case PMIC_AXP: 683 gs->eldo1_1p8v = gmin_get_var_int(dev, false, 684 "eldo1_1p8v", 685 ELDO1_1P8V); 686 gs->eldo1_sel_reg = gmin_get_var_int(dev, false, 687 "eldo1_sel_reg", 688 ELDO1_SEL_REG); 689 gs->eldo1_ctrl_shift = gmin_get_var_int(dev, false, 690 "eldo1_ctrl_shift", 691 ELDO1_CTRL_SHIFT); 692 gs->eldo2_1p8v = gmin_get_var_int(dev, false, 693 "eldo2_1p8v", 694 ELDO2_1P8V); 695 gs->eldo2_sel_reg = gmin_get_var_int(dev, false, 696 "eldo2_sel_reg", 697 ELDO2_SEL_REG); 698 gs->eldo2_ctrl_shift = gmin_get_var_int(dev, false, 699 "eldo2_ctrl_shift", 700 ELDO2_CTRL_SHIFT); 701 break; 702 703 default: 704 break; 705 } 706 707 return gs; 708 } 709 710 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev) 711 { 712 int i; 713 714 for (i = 0; i < MAX_SUBDEVS; i++) 715 if (gmin_subdevs[i].subdev == subdev) 716 return &gmin_subdevs[i]; 717 return NULL; 718 } 719 720 static int axp_regulator_set(struct device *dev, struct gmin_subdev *gs, 721 int sel_reg, u8 setting, 722 int ctrl_reg, int shift, bool on) 723 { 724 int ret; 725 int val; 726 727 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, setting, 0xff); 728 if (ret) 729 return ret; 730 731 val = on ? 1 << shift : 0; 732 733 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, val, 1 << shift); 734 if (ret) 735 return ret; 736 737 return 0; 738 } 739 740 static int axp_v1p8_on(struct device *dev, struct gmin_subdev *gs) 741 { 742 int ret; 743 744 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 745 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, true); 746 if (ret) 747 return ret; 748 749 /* 750 * This sleep comes out of the gc2235 driver, which is the 751 * only one I currently see that wants to set both 1.8v rails. 752 */ 753 usleep_range(110, 150); 754 755 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p8v, 756 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, true); 757 if (ret) 758 return ret; 759 760 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 761 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false); 762 return ret; 763 } 764 765 static int axp_v1p8_off(struct device *dev, struct gmin_subdev *gs) 766 { 767 int ret; 768 769 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p8v, 770 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, false); 771 if (ret) 772 return ret; 773 774 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 775 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false); 776 return ret; 777 } 778 779 static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on) 780 { 781 struct gmin_subdev *gs = find_gmin_subdev(subdev); 782 783 if (gs) { 784 gpiod_set_value(gs->gpio0, on); 785 return 0; 786 } 787 return -EINVAL; 788 } 789 790 static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on) 791 { 792 struct gmin_subdev *gs = find_gmin_subdev(subdev); 793 794 if (gs) { 795 gpiod_set_value(gs->gpio1, on); 796 return 0; 797 } 798 return -EINVAL; 799 } 800 801 static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on) 802 { 803 struct gmin_subdev *gs = find_gmin_subdev(subdev); 804 805 if (!gs || gs->v1p2_on == on) 806 return 0; 807 gs->v1p2_on = on; 808 809 /* use regulator for PMIC */ 810 if (gs->v1p2_reg) { 811 if (on) 812 return regulator_enable(gs->v1p2_reg); 813 else 814 return regulator_disable(gs->v1p2_reg); 815 } 816 817 /* TODO:v1p2 may need to extend to other PMICs */ 818 819 return -EINVAL; 820 } 821 822 static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on) 823 { 824 struct gmin_subdev *gs = find_gmin_subdev(subdev); 825 int ret; 826 struct device *dev; 827 struct i2c_client *client = v4l2_get_subdevdata(subdev); 828 int value; 829 830 dev = &client->dev; 831 832 if (gs->v1p8_gpio >= 0) { 833 pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n", 834 gs->v1p8_gpio); 835 ret = gpio_request(gs->v1p8_gpio, "camera_v1p8_en"); 836 if (!ret) 837 ret = gpio_direction_output(gs->v1p8_gpio, 0); 838 if (ret) 839 pr_err("V1P8 GPIO initialization failed\n"); 840 } 841 842 if (!gs || gs->v1p8_on == on) 843 return 0; 844 gs->v1p8_on = on; 845 846 if (gs->v1p8_gpio >= 0) 847 gpio_set_value(gs->v1p8_gpio, on); 848 849 if (gs->v1p8_reg) { 850 regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000); 851 if (on) 852 return regulator_enable(gs->v1p8_reg); 853 else 854 return regulator_disable(gs->v1p8_reg); 855 } 856 857 switch (pmic_id) { 858 case PMIC_AXP: 859 if (on) 860 return axp_v1p8_on(subdev->dev, gs); 861 else 862 return axp_v1p8_off(subdev->dev, gs); 863 case PMIC_TI: 864 value = on ? LDO_1P8V_ON : LDO_1P8V_OFF; 865 866 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 867 LDO10_REG, value, 0xff); 868 case PMIC_CRYSTALCOVE: 869 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 870 871 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 872 CRYSTAL_1P8V_REG, value, 0xff); 873 default: 874 dev_err(subdev->dev, "Couldn't set power mode for v1p2\n"); 875 } 876 877 return -EINVAL; 878 } 879 880 static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on) 881 { 882 struct gmin_subdev *gs = find_gmin_subdev(subdev); 883 int ret; 884 struct device *dev; 885 struct i2c_client *client = v4l2_get_subdevdata(subdev); 886 int value; 887 888 dev = &client->dev; 889 890 if (gs->v2p8_gpio >= 0) { 891 pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n", 892 gs->v2p8_gpio); 893 ret = gpio_request(gs->v2p8_gpio, "camera_v2p8"); 894 if (!ret) 895 ret = gpio_direction_output(gs->v2p8_gpio, 0); 896 if (ret) 897 pr_err("V2P8 GPIO initialization failed\n"); 898 } 899 900 if (!gs || gs->v2p8_on == on) 901 return 0; 902 gs->v2p8_on = on; 903 904 if (gs->v2p8_gpio >= 0) 905 gpio_set_value(gs->v2p8_gpio, on); 906 907 if (gs->v2p8_reg) { 908 regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000); 909 if (on) 910 return regulator_enable(gs->v2p8_reg); 911 else 912 return regulator_disable(gs->v2p8_reg); 913 } 914 915 switch (pmic_id) { 916 case PMIC_AXP: 917 return axp_regulator_set(subdev->dev, gs, ALDO1_SEL_REG, 918 ALDO1_2P8V, ALDO1_CTRL3_REG, 919 ALDO1_CTRL3_SHIFT, on); 920 case PMIC_TI: 921 value = on ? LDO_2P8V_ON : LDO_2P8V_OFF; 922 923 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 924 LDO9_REG, value, 0xff); 925 case PMIC_CRYSTALCOVE: 926 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 927 928 return gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 929 CRYSTAL_2P8V_REG, value, 0xff); 930 default: 931 dev_err(subdev->dev, "Couldn't set power mode for v1p2\n"); 932 } 933 934 return -EINVAL; 935 } 936 937 static int gmin_acpi_pm_ctrl(struct v4l2_subdev *subdev, int on) 938 { 939 int ret = 0; 940 struct gmin_subdev *gs = find_gmin_subdev(subdev); 941 struct i2c_client *client = v4l2_get_subdevdata(subdev); 942 struct acpi_device *adev = ACPI_COMPANION(&client->dev); 943 944 /* Use the ACPI power management to control it */ 945 on = !!on; 946 if (gs->clock_on == on) 947 return 0; 948 949 dev_dbg(subdev->dev, "Setting power state to %s\n", 950 on ? "on" : "off"); 951 952 if (on) 953 ret = acpi_device_set_power(adev, 954 ACPI_STATE_D0); 955 else 956 ret = acpi_device_set_power(adev, 957 ACPI_STATE_D3_COLD); 958 959 if (!ret) 960 gs->clock_on = on; 961 else 962 dev_err(subdev->dev, "Couldn't set power state to %s\n", 963 on ? "on" : "off"); 964 965 return ret; 966 } 967 968 static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on) 969 { 970 int ret = 0; 971 struct gmin_subdev *gs = find_gmin_subdev(subdev); 972 struct i2c_client *client = v4l2_get_subdevdata(subdev); 973 974 if (gs->clock_on == !!on) 975 return 0; 976 977 if (on) { 978 ret = clk_set_rate(gs->pmc_clk, 979 gs->clock_src ? CLK_RATE_19_2MHZ : CLK_RATE_25_0MHZ); 980 981 if (ret) 982 dev_err(&client->dev, "unable to set PMC rate %d\n", 983 gs->clock_src); 984 985 ret = clk_prepare_enable(gs->pmc_clk); 986 if (ret == 0) 987 gs->clock_on = true; 988 } else { 989 clk_disable_unprepare(gs->pmc_clk); 990 gs->clock_on = false; 991 } 992 993 return ret; 994 } 995 996 static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag) 997 { 998 struct i2c_client *client = v4l2_get_subdevdata(sd); 999 struct gmin_subdev *gs = find_gmin_subdev(sd); 1000 1001 if (!client || !gs) 1002 return -ENODEV; 1003 1004 return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes, 1005 gs->csi_fmt, gs->csi_bayer, flag); 1006 } 1007 1008 static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev, 1009 char *camera_module) 1010 { 1011 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1012 struct gmin_subdev *gs = find_gmin_subdev(subdev); 1013 struct camera_vcm_control *vcm; 1014 1015 if (!client || !gs) 1016 return NULL; 1017 1018 if (!camera_module) 1019 return NULL; 1020 1021 mutex_lock(&vcm_lock); 1022 list_for_each_entry(vcm, &vcm_devices, list) { 1023 if (!strcmp(camera_module, vcm->camera_module)) { 1024 mutex_unlock(&vcm_lock); 1025 return vcm; 1026 } 1027 } 1028 1029 mutex_unlock(&vcm_lock); 1030 return NULL; 1031 } 1032 1033 static struct camera_sensor_platform_data pmic_gmin_plat = { 1034 .gpio0_ctrl = gmin_gpio0_ctrl, 1035 .gpio1_ctrl = gmin_gpio1_ctrl, 1036 .v1p8_ctrl = gmin_v1p8_ctrl, 1037 .v2p8_ctrl = gmin_v2p8_ctrl, 1038 .v1p2_ctrl = gmin_v1p2_ctrl, 1039 .flisclk_ctrl = gmin_flisclk_ctrl, 1040 .csi_cfg = gmin_csi_cfg, 1041 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1042 }; 1043 1044 static struct camera_sensor_platform_data acpi_gmin_plat = { 1045 .gpio0_ctrl = gmin_gpio0_ctrl, 1046 .gpio1_ctrl = gmin_gpio1_ctrl, 1047 .v1p8_ctrl = gmin_acpi_pm_ctrl, 1048 .v2p8_ctrl = gmin_acpi_pm_ctrl, 1049 .v1p2_ctrl = gmin_acpi_pm_ctrl, 1050 .flisclk_ctrl = gmin_acpi_pm_ctrl, 1051 .csi_cfg = gmin_csi_cfg, 1052 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1053 }; 1054 1055 struct camera_sensor_platform_data *gmin_camera_platform_data( 1056 struct v4l2_subdev *subdev, 1057 enum atomisp_input_format csi_format, 1058 enum atomisp_bayer_order csi_bayer) 1059 { 1060 struct gmin_subdev *gs = gmin_subdev_add(subdev); 1061 1062 gs->csi_fmt = csi_format; 1063 gs->csi_bayer = csi_bayer; 1064 1065 if (gs->pmc_clk) 1066 return &pmic_gmin_plat; 1067 else 1068 return &acpi_gmin_plat; 1069 } 1070 EXPORT_SYMBOL_GPL(gmin_camera_platform_data); 1071 1072 int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl) 1073 { 1074 if (!vcmCtrl) 1075 return -EINVAL; 1076 1077 mutex_lock(&vcm_lock); 1078 list_add_tail(&vcmCtrl->list, &vcm_devices); 1079 mutex_unlock(&vcm_lock); 1080 1081 return 0; 1082 } 1083 EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control); 1084 1085 static int gmin_get_hardcoded_var(struct device *dev, 1086 struct gmin_cfg_var *varlist, 1087 const char *var8, char *out, size_t *out_len) 1088 { 1089 struct gmin_cfg_var *gv; 1090 1091 for (gv = varlist; gv->name; gv++) { 1092 size_t vl; 1093 1094 if (strcmp(var8, gv->name)) 1095 continue; 1096 1097 dev_info(dev, "Found DMI entry for '%s'\n", var8); 1098 1099 vl = strlen(gv->val); 1100 if (vl > *out_len - 1) 1101 return -ENOSPC; 1102 1103 strscpy(out, gv->val, *out_len); 1104 *out_len = vl; 1105 return 0; 1106 } 1107 1108 return -EINVAL; 1109 } 1110 1111 1112 static int gmin_get_config_dsm_var(struct device *dev, 1113 const char *var, 1114 char *out, size_t *out_len) 1115 { 1116 acpi_handle handle = ACPI_HANDLE(dev); 1117 union acpi_object *obj, *cur = NULL; 1118 int i; 1119 1120 /* 1121 * The data reported by "CamClk" seems to be either 0 or 1 at the 1122 * _DSM table. 1123 * 1124 * At the ACPI tables we looked so far, this is not related to the 1125 * actual clock source for the sensor, which is given by the 1126 * _PR0 ACPI table. So, ignore it, as otherwise this will be 1127 * set to a wrong value. 1128 */ 1129 if (!strcmp(var, "CamClk")) 1130 return -EINVAL; 1131 1132 obj = acpi_evaluate_dsm(handle, &atomisp_dsm_guid, 0, 0, NULL); 1133 if (!obj) { 1134 dev_info_once(dev, "Didn't find ACPI _DSM table.\n"); 1135 return -EINVAL; 1136 } 1137 1138 /* Return on unexpected object type */ 1139 if (obj->type != ACPI_TYPE_PACKAGE) 1140 return -EINVAL; 1141 1142 #if 0 /* Just for debugging purposes */ 1143 for (i = 0; i < obj->package.count; i++) { 1144 union acpi_object *cur = &obj->package.elements[i]; 1145 1146 if (cur->type == ACPI_TYPE_INTEGER) 1147 dev_info(dev, "object #%d, type %d, value: %lld\n", 1148 i, cur->type, cur->integer.value); 1149 else if (cur->type == ACPI_TYPE_STRING) 1150 dev_info(dev, "object #%d, type %d, string: %s\n", 1151 i, cur->type, cur->string.pointer); 1152 else 1153 dev_info(dev, "object #%d, type %d\n", 1154 i, cur->type); 1155 } 1156 #endif 1157 1158 /* Seek for the desired var */ 1159 for (i = 0; i < obj->package.count - 1; i += 2) { 1160 if (obj->package.elements[i].type == ACPI_TYPE_STRING && 1161 !strcmp(obj->package.elements[i].string.pointer, var)) { 1162 /* Next element should be the required value */ 1163 cur = &obj->package.elements[i + 1]; 1164 break; 1165 } 1166 } 1167 1168 if (!cur) { 1169 dev_info(dev, "didn't found _DSM entry for '%s'\n", var); 1170 ACPI_FREE(obj); 1171 return -EINVAL; 1172 } 1173 1174 /* 1175 * While it could be possible to have an ACPI_TYPE_INTEGER, 1176 * and read the value from cur->integer.value, the table 1177 * seen so far uses the string type. So, produce a warning 1178 * if it founds something different than string, letting it 1179 * to fall back to the old code. 1180 */ 1181 if (cur && cur->type != ACPI_TYPE_STRING) { 1182 dev_info(dev, "found non-string _DSM entry for '%s'\n", var); 1183 ACPI_FREE(obj); 1184 return -EINVAL; 1185 } 1186 1187 dev_info(dev, "found _DSM entry for '%s': %s\n", var, 1188 cur->string.pointer); 1189 strscpy(out, cur->string.pointer, *out_len); 1190 *out_len = strlen(cur->string.pointer); 1191 1192 ACPI_FREE(obj); 1193 return 0; 1194 } 1195 1196 /* Retrieves a device-specific configuration variable. The dev 1197 * argument should be a device with an ACPI companion, as all 1198 * configuration is based on firmware ID. 1199 */ 1200 static int gmin_get_config_var(struct device *maindev, 1201 bool is_gmin, 1202 const char *var, 1203 char *out, size_t *out_len) 1204 { 1205 efi_char16_t var16[CFG_VAR_NAME_MAX]; 1206 const struct dmi_system_id *id; 1207 struct device *dev = maindev; 1208 char var8[CFG_VAR_NAME_MAX]; 1209 struct efivar_entry *ev; 1210 int i, ret; 1211 1212 /* For sensors, try first to use the _DSM table */ 1213 if (!is_gmin) { 1214 ret = gmin_get_config_dsm_var(maindev, var, out, out_len); 1215 if (!ret) 1216 return 0; 1217 } 1218 1219 /* Fall-back to other approaches */ 1220 1221 if (!is_gmin && ACPI_COMPANION(dev)) 1222 dev = &ACPI_COMPANION(dev)->dev; 1223 1224 if (!is_gmin) 1225 ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var); 1226 else 1227 ret = snprintf(var8, sizeof(var8), "gmin_%s", var); 1228 1229 if (ret < 0 || ret >= sizeof(var8) - 1) 1230 return -EINVAL; 1231 1232 /* First check a hard-coded list of board-specific variables. 1233 * Some device firmwares lack the ability to set EFI variables at 1234 * runtime. 1235 */ 1236 id = dmi_first_match(gmin_vars); 1237 if (id) { 1238 ret = gmin_get_hardcoded_var(maindev, id->driver_data, var8, 1239 out, out_len); 1240 if (!ret) 1241 return 0; 1242 } 1243 1244 /* Our variable names are ASCII by construction, but EFI names 1245 * are wide chars. Convert and zero-pad. 1246 */ 1247 memset(var16, 0, sizeof(var16)); 1248 for (i = 0; i < sizeof(var8) && var8[i]; i++) 1249 var16[i] = var8[i]; 1250 1251 /* Not sure this API usage is kosher; efivar_entry_get()'s 1252 * implementation simply uses VariableName and VendorGuid from 1253 * the struct and ignores the rest, but it seems like there 1254 * ought to be an "official" efivar_entry registered 1255 * somewhere? 1256 */ 1257 ev = kzalloc(sizeof(*ev), GFP_KERNEL); 1258 if (!ev) 1259 return -ENOMEM; 1260 memcpy(&ev->var.VariableName, var16, sizeof(var16)); 1261 ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID; 1262 ev->var.DataSize = *out_len; 1263 1264 ret = efivar_entry_get(ev, &ev->var.Attributes, 1265 &ev->var.DataSize, ev->var.Data); 1266 if (ret == 0) { 1267 memcpy(out, ev->var.Data, ev->var.DataSize); 1268 *out_len = ev->var.DataSize; 1269 dev_info(maindev, "found EFI entry for '%s'\n", var8); 1270 } else if (is_gmin) { 1271 dev_info(maindev, "Failed to find EFI gmin variable %s\n", var8); 1272 } else { 1273 dev_info(maindev, "Failed to find EFI variable %s\n", var8); 1274 } 1275 1276 kfree(ev); 1277 1278 return ret; 1279 } 1280 1281 int gmin_get_var_int(struct device *dev, bool is_gmin, const char *var, int def) 1282 { 1283 char val[CFG_VAR_NAME_MAX]; 1284 size_t len = sizeof(val); 1285 long result; 1286 int ret; 1287 1288 ret = gmin_get_config_var(dev, is_gmin, var, val, &len); 1289 if (!ret) { 1290 val[len] = 0; 1291 ret = kstrtol(val, 0, &result); 1292 } else { 1293 dev_info(dev, "%s: using default (%d)\n", var, def); 1294 } 1295 1296 return ret ? def : result; 1297 } 1298 EXPORT_SYMBOL_GPL(gmin_get_var_int); 1299 1300 int camera_sensor_csi(struct v4l2_subdev *sd, u32 port, 1301 u32 lanes, u32 format, u32 bayer_order, int flag) 1302 { 1303 struct i2c_client *client = v4l2_get_subdevdata(sd); 1304 struct camera_mipi_info *csi = NULL; 1305 1306 if (flag) { 1307 csi = kzalloc(sizeof(*csi), GFP_KERNEL); 1308 if (!csi) 1309 return -ENOMEM; 1310 csi->port = port; 1311 csi->num_lanes = lanes; 1312 csi->input_format = format; 1313 csi->raw_bayer_order = bayer_order; 1314 v4l2_set_subdev_hostdata(sd, (void *)csi); 1315 csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED; 1316 csi->metadata_effective_width = NULL; 1317 dev_info(&client->dev, 1318 "camera pdata: port: %d lanes: %d order: %8.8x\n", 1319 port, lanes, bayer_order); 1320 } else { 1321 csi = v4l2_get_subdev_hostdata(sd); 1322 kfree(csi); 1323 } 1324 1325 return 0; 1326 } 1327 EXPORT_SYMBOL_GPL(camera_sensor_csi); 1328 1329 /* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't 1330 * work. Disable so the kernel framework doesn't hang the device 1331 * trying. The driver itself does direct calls to the PUNIT to manage 1332 * ISP power. 1333 */ 1334 static void isp_pm_cap_fixup(struct pci_dev *pdev) 1335 { 1336 dev_info(&pdev->dev, "Disabling PCI power management on camera ISP\n"); 1337 pdev->pm_cap = 0; 1338 } 1339 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup); 1340 1341 MODULE_DESCRIPTION("Ancillary routines for binding ACPI devices"); 1342 MODULE_LICENSE("GPL"); 1343