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_1P6V 0x12 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_1p6v, 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 static DEFINE_MUTEX(gmin_regulator_mutex); 122 static int gmin_v1p8_enable_count; 123 static int gmin_v2p8_enable_count; 124 125 /* The atomisp uses type==0 for the end-of-list marker, so leave space. */ 126 static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1]; 127 128 static const struct atomisp_platform_data pdata = { 129 .subdevs = pdata_subdevs, 130 }; 131 132 static LIST_HEAD(vcm_devices); 133 static DEFINE_MUTEX(vcm_lock); 134 135 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev); 136 137 /* 138 * Legacy/stub behavior copied from upstream platform_camera.c. The 139 * atomisp driver relies on these values being non-NULL in a few 140 * places, even though they are hard-coded in all current 141 * implementations. 142 */ 143 const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void) 144 { 145 static const struct atomisp_camera_caps caps = { 146 .sensor_num = 1, 147 .sensor = { 148 { .stream_num = 1, }, 149 }, 150 }; 151 return ∩︀ 152 } 153 EXPORT_SYMBOL_GPL(atomisp_get_default_camera_caps); 154 155 const struct atomisp_platform_data *atomisp_get_platform_data(void) 156 { 157 return &pdata; 158 } 159 EXPORT_SYMBOL_GPL(atomisp_get_platform_data); 160 161 int atomisp_register_i2c_module(struct v4l2_subdev *subdev, 162 struct camera_sensor_platform_data *plat_data, 163 enum intel_v4l2_subdev_type type) 164 { 165 int i; 166 struct i2c_board_info *bi; 167 struct gmin_subdev *gs; 168 struct i2c_client *client = v4l2_get_subdevdata(subdev); 169 struct acpi_device *adev = ACPI_COMPANION(&client->dev); 170 171 dev_info(&client->dev, "register atomisp i2c module type %d\n", type); 172 173 /* The windows driver model (and thus most BIOSes by default) 174 * uses ACPI runtime power management for camera devices, but 175 * we don't. Disable it, or else the rails will be needlessly 176 * tickled during suspend/resume. This has caused power and 177 * performance issues on multiple devices. 178 */ 179 adev->power.flags.power_resources = 0; 180 181 for (i = 0; i < MAX_SUBDEVS; i++) 182 if (!pdata.subdevs[i].type) 183 break; 184 185 if (pdata.subdevs[i].type) 186 return -ENOMEM; 187 188 /* Note subtlety of initialization order: at the point where 189 * this registration API gets called, the platform data 190 * callbacks have probably already been invoked, so the 191 * gmin_subdev struct is already initialized for us. 192 */ 193 gs = find_gmin_subdev(subdev); 194 if (!gs) 195 return -ENODEV; 196 197 pdata.subdevs[i].type = type; 198 pdata.subdevs[i].port = gs->csi_port; 199 pdata.subdevs[i].subdev = subdev; 200 pdata.subdevs[i].v4l2_subdev.i2c_adapter_id = client->adapter->nr; 201 202 /* Convert i2c_client to i2c_board_info */ 203 bi = &pdata.subdevs[i].v4l2_subdev.board_info; 204 memcpy(bi->type, client->name, I2C_NAME_SIZE); 205 bi->flags = client->flags; 206 bi->addr = client->addr; 207 bi->irq = client->irq; 208 bi->platform_data = plat_data; 209 210 return 0; 211 } 212 EXPORT_SYMBOL_GPL(atomisp_register_i2c_module); 213 214 struct v4l2_subdev *atomisp_gmin_find_subdev(struct i2c_adapter *adapter, 215 struct i2c_board_info *board_info) 216 { 217 int i; 218 219 for (i = 0; i < MAX_SUBDEVS && pdata.subdevs[i].type; i++) { 220 struct intel_v4l2_subdev_table *sd = &pdata.subdevs[i]; 221 222 if (sd->v4l2_subdev.i2c_adapter_id == adapter->nr && 223 sd->v4l2_subdev.board_info.addr == board_info->addr) 224 return sd->subdev; 225 } 226 return NULL; 227 } 228 EXPORT_SYMBOL_GPL(atomisp_gmin_find_subdev); 229 230 int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd) 231 { 232 int i, j; 233 234 if (!sd) 235 return 0; 236 237 for (i = 0; i < MAX_SUBDEVS; i++) { 238 if (pdata.subdevs[i].subdev == sd) { 239 for (j = i + 1; j <= MAX_SUBDEVS; j++) 240 pdata.subdevs[j - 1] = pdata.subdevs[j]; 241 } 242 if (gmin_subdevs[i].subdev == sd) { 243 if (gmin_subdevs[i].gpio0) 244 gpiod_put(gmin_subdevs[i].gpio0); 245 gmin_subdevs[i].gpio0 = NULL; 246 if (gmin_subdevs[i].gpio1) 247 gpiod_put(gmin_subdevs[i].gpio1); 248 gmin_subdevs[i].gpio1 = NULL; 249 if (pmic_id == PMIC_REGULATOR) { 250 regulator_put(gmin_subdevs[i].v1p8_reg); 251 regulator_put(gmin_subdevs[i].v2p8_reg); 252 regulator_put(gmin_subdevs[i].v1p2_reg); 253 regulator_put(gmin_subdevs[i].v2p8_vcm_reg); 254 } 255 gmin_subdevs[i].subdev = NULL; 256 } 257 } 258 return 0; 259 } 260 EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev); 261 262 struct gmin_cfg_var { 263 const char *name, *val; 264 }; 265 266 static struct gmin_cfg_var ffrd8_vars[] = { 267 { "INTCF1B:00_ImxId", "0x134" }, 268 { "INTCF1B:00_CsiPort", "1" }, 269 { "INTCF1B:00_CsiLanes", "4" }, 270 { "INTCF1B:00_CamClk", "0" }, 271 {}, 272 }; 273 274 /* Cribbed from MCG defaults in the mt9m114 driver, not actually verified 275 * vs. T100 hardware 276 */ 277 static struct gmin_cfg_var t100_vars[] = { 278 { "INT33F0:00_CsiPort", "0" }, 279 { "INT33F0:00_CsiLanes", "1" }, 280 { "INT33F0:00_CamClk", "1" }, 281 {}, 282 }; 283 284 static struct gmin_cfg_var mrd7_vars[] = { 285 {"INT33F8:00_CamType", "1"}, 286 {"INT33F8:00_CsiPort", "1"}, 287 {"INT33F8:00_CsiLanes", "2"}, 288 {"INT33F8:00_CsiFmt", "13"}, 289 {"INT33F8:00_CsiBayer", "0"}, 290 {"INT33F8:00_CamClk", "0"}, 291 292 {"INT33F9:00_CamType", "1"}, 293 {"INT33F9:00_CsiPort", "0"}, 294 {"INT33F9:00_CsiLanes", "1"}, 295 {"INT33F9:00_CsiFmt", "13"}, 296 {"INT33F9:00_CsiBayer", "0"}, 297 {"INT33F9:00_CamClk", "1"}, 298 {}, 299 }; 300 301 static struct gmin_cfg_var ecs7_vars[] = { 302 {"INT33BE:00_CsiPort", "1"}, 303 {"INT33BE:00_CsiLanes", "2"}, 304 {"INT33BE:00_CsiFmt", "13"}, 305 {"INT33BE:00_CsiBayer", "2"}, 306 {"INT33BE:00_CamClk", "0"}, 307 308 {"INT33F0:00_CsiPort", "0"}, 309 {"INT33F0:00_CsiLanes", "1"}, 310 {"INT33F0:00_CsiFmt", "13"}, 311 {"INT33F0:00_CsiBayer", "0"}, 312 {"INT33F0:00_CamClk", "1"}, 313 {"gmin_V2P8GPIO", "402"}, 314 {}, 315 }; 316 317 static struct gmin_cfg_var i8880_vars[] = { 318 {"XXOV2680:00_CsiPort", "1"}, 319 {"XXOV2680:00_CsiLanes", "1"}, 320 {"XXOV2680:00_CamClk", "0"}, 321 322 {"XXGC0310:00_CsiPort", "0"}, 323 {"XXGC0310:00_CsiLanes", "1"}, 324 {"XXGC0310:00_CamClk", "1"}, 325 {}, 326 }; 327 328 /* 329 * Surface 3 does not describe CsiPort/CsiLanes in both DSDT and EFI. 330 */ 331 static struct gmin_cfg_var surface3_vars[] = { 332 {"APTA0330:00_CsiPort", "0"}, 333 {"APTA0330:00_CsiLanes", "2"}, 334 335 {"OVTI8835:00_CsiPort", "1"}, 336 {"OVTI8835:00_CsiLanes", "4"}, 337 {}, 338 }; 339 340 static const struct dmi_system_id gmin_vars[] = { 341 { 342 .ident = "BYT-T FFD8", 343 .matches = { 344 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"), 345 }, 346 .driver_data = ffrd8_vars, 347 }, 348 { 349 .ident = "T100TA", 350 .matches = { 351 DMI_MATCH(DMI_BOARD_NAME, "T100TA"), 352 }, 353 .driver_data = t100_vars, 354 }, 355 { 356 .ident = "MRD7", 357 .matches = { 358 DMI_MATCH(DMI_BOARD_NAME, "TABLET"), 359 DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"), 360 }, 361 .driver_data = mrd7_vars, 362 }, 363 { 364 .ident = "ST70408", 365 .matches = { 366 DMI_MATCH(DMI_BOARD_NAME, "ST70408"), 367 }, 368 .driver_data = ecs7_vars, 369 }, 370 { 371 .ident = "VTA0803", 372 .matches = { 373 DMI_MATCH(DMI_BOARD_NAME, "VTA0803"), 374 }, 375 .driver_data = i8880_vars, 376 }, 377 { 378 .ident = "Surface 3", 379 .matches = { 380 DMI_MATCH(DMI_BOARD_NAME, "Surface 3"), 381 }, 382 .driver_data = surface3_vars, 383 }, 384 {} 385 }; 386 387 #define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \ 388 0xa9, 0x71, 0xe8, 0x77, \ 389 0x75, 0x60, 0x68, 0xf7) 390 391 static const guid_t atomisp_dsm_guid = GUID_INIT(0xdc2f6c4f, 0x045b, 0x4f1d, 392 0x97, 0xb9, 0x88, 0x2a, 393 0x68, 0x60, 0xa4, 0xbe); 394 395 #define CFG_VAR_NAME_MAX 64 396 397 #define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */ 398 static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME]; 399 400 static struct i2c_client *gmin_i2c_dev_exists(struct device *dev, char *name, 401 struct i2c_client **client) 402 { 403 struct acpi_device *adev; 404 struct device *d; 405 406 adev = acpi_dev_get_first_match_dev(name, NULL, -1); 407 if (!adev) 408 return NULL; 409 410 d = bus_find_device_by_acpi_dev(&i2c_bus_type, adev); 411 acpi_dev_put(adev); 412 if (!d) 413 return NULL; 414 415 *client = i2c_verify_client(d); 416 put_device(d); 417 418 dev_dbg(dev, "found '%s' at address 0x%02x, adapter %d\n", 419 (*client)->name, (*client)->addr, (*client)->adapter->nr); 420 return *client; 421 } 422 423 static int gmin_i2c_write(struct device *dev, u16 i2c_addr, u8 reg, 424 u32 value, u32 mask) 425 { 426 int ret; 427 428 /* 429 * FIXME: Right now, the intel_pmic driver just write values 430 * directly at the regmap, instead of properly implementing 431 * i2c_transfer() mechanism. Let's use the same interface here, 432 * as otherwise we may face issues. 433 */ 434 435 dev_dbg(dev, 436 "I2C write, addr: 0x%02x, reg: 0x%02x, value: 0x%02x, mask: 0x%02x\n", 437 i2c_addr, reg, value, mask); 438 439 ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_addr, reg, value, mask); 440 if (ret == -EOPNOTSUPP) 441 dev_err(dev, 442 "ACPI didn't mapped the OpRegion needed to access I2C address 0x%02x.\n" 443 "Need to compile the kernel using CONFIG_*_PMIC_OPREGION settings\n", 444 i2c_addr); 445 446 return ret; 447 } 448 449 static int atomisp_get_acpi_power(struct device *dev) 450 { 451 char name[5]; 452 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 453 struct acpi_buffer b_name = { sizeof(name), name }; 454 union acpi_object *package, *element; 455 acpi_handle handle = ACPI_HANDLE(dev); 456 acpi_handle rhandle; 457 acpi_status status; 458 int clock_num = -1; 459 int i; 460 461 status = acpi_evaluate_object(handle, "_PR0", NULL, &buffer); 462 if (!ACPI_SUCCESS(status)) 463 return -1; 464 465 package = buffer.pointer; 466 467 if (!buffer.length || !package 468 || package->type != ACPI_TYPE_PACKAGE 469 || !package->package.count) 470 goto fail; 471 472 for (i = 0; i < package->package.count; i++) { 473 element = &package->package.elements[i]; 474 475 if (element->type != ACPI_TYPE_LOCAL_REFERENCE) 476 continue; 477 478 rhandle = element->reference.handle; 479 if (!rhandle) 480 goto fail; 481 482 acpi_get_name(rhandle, ACPI_SINGLE_NAME, &b_name); 483 484 dev_dbg(dev, "Found PM resource '%s'\n", name); 485 if (strlen(name) == 4 && !strncmp(name, "CLK", 3)) { 486 if (name[3] >= '0' && name[3] <= '4') 487 clock_num = name[3] - '0'; 488 #if 0 489 /* 490 * We could abort here, but let's parse all resources, 491 * as this is helpful for debugging purposes 492 */ 493 if (clock_num >= 0) 494 break; 495 #endif 496 } 497 } 498 499 fail: 500 ACPI_FREE(buffer.pointer); 501 502 return clock_num; 503 } 504 505 static u8 gmin_get_pmic_id_and_addr(struct device *dev) 506 { 507 struct i2c_client *power = NULL; 508 static u8 pmic_i2c_addr; 509 510 if (pmic_id) 511 return pmic_i2c_addr; 512 513 if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power)) 514 pmic_id = PMIC_TI; 515 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power)) 516 pmic_id = PMIC_AXP; 517 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power)) 518 pmic_id = PMIC_CRYSTALCOVE; 519 else 520 pmic_id = PMIC_REGULATOR; 521 522 pmic_i2c_addr = power ? power->addr : 0; 523 return pmic_i2c_addr; 524 } 525 526 static int gmin_detect_pmic(struct v4l2_subdev *subdev) 527 { 528 struct i2c_client *client = v4l2_get_subdevdata(subdev); 529 struct device *dev = &client->dev; 530 u8 pmic_i2c_addr; 531 532 pmic_i2c_addr = gmin_get_pmic_id_and_addr(dev); 533 dev_info(dev, "gmin: power management provided via %s (i2c addr 0x%02x)\n", 534 pmic_name[pmic_id], pmic_i2c_addr); 535 return pmic_i2c_addr; 536 } 537 538 static int gmin_subdev_add(struct gmin_subdev *gs) 539 { 540 struct i2c_client *client = v4l2_get_subdevdata(gs->subdev); 541 struct device *dev = &client->dev; 542 struct acpi_device *adev = ACPI_COMPANION(dev); 543 int ret, clock_num = -1; 544 545 dev_info(dev, "%s: ACPI path is %pfw\n", __func__, dev_fwnode(dev)); 546 547 /*WA:CHT requires XTAL clock as PLL is not stable.*/ 548 gs->clock_src = gmin_get_var_int(dev, false, "ClkSrc", 549 VLV2_CLK_PLL_19P2MHZ); 550 551 gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", 0); 552 gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1); 553 554 gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); 555 if (IS_ERR(gs->gpio0)) 556 gs->gpio0 = NULL; 557 else 558 dev_info(dev, "will handle gpio0 via ACPI\n"); 559 560 gs->gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW); 561 if (IS_ERR(gs->gpio1)) 562 gs->gpio1 = NULL; 563 else 564 dev_info(dev, "will handle gpio1 via ACPI\n"); 565 566 /* 567 * Those are used only when there is an external regulator apart 568 * from the PMIC that would be providing power supply, like on the 569 * two cases below: 570 * 571 * The ECS E7 board drives camera 2.8v from an external regulator 572 * instead of the PMIC. There's a gmin_CamV2P8 config variable 573 * that specifies the GPIO to handle this particular case, 574 * but this needs a broader architecture for handling camera power. 575 * 576 * The CHT RVP board drives camera 1.8v from an* external regulator 577 * instead of the PMIC just like ECS E7 board. 578 */ 579 580 gs->v1p8_gpio = gmin_get_var_int(dev, true, "V1P8GPIO", -1); 581 gs->v2p8_gpio = gmin_get_var_int(dev, true, "V2P8GPIO", -1); 582 583 /* 584 * FIXME: 585 * 586 * The ACPI handling code checks for the _PR? tables in order to 587 * know what is required to switch the device from power state 588 * D0 (_PR0) up to D3COLD (_PR3). 589 * 590 * The adev->flags.power_manageable is set to true if the device 591 * has a _PR0 table, which can be checked by calling 592 * acpi_device_power_manageable(adev). 593 * 594 * However, this only says that the device can be set to power off 595 * mode. 596 * 597 * At least on the DSDT tables we've seen so far, there's no _PR3, 598 * nor _PS3 (which would have a somewhat similar effect). 599 * So, using ACPI for power management won't work, except if adding 600 * an ACPI override logic somewhere. 601 * 602 * So, at least for the existing devices we know, the check below 603 * will always be false. 604 */ 605 if (acpi_device_can_wakeup(adev) && 606 acpi_device_can_poweroff(adev)) { 607 dev_info(dev, 608 "gmin: power management provided via device PM\n"); 609 return 0; 610 } 611 612 /* 613 * The code below is here due to backward compatibility with devices 614 * whose ACPI BIOS may not contain everything that would be needed 615 * in order to set clocks and do power management. 616 */ 617 618 /* 619 * According with : 620 * https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md 621 * 622 * The "CamClk" EFI var is set via fastboot on some Android devices, 623 * and seems to contain the number of the clock used to feed the 624 * sensor. 625 * 626 * On systems with a proper ACPI table, this is given via the _PR0 627 * power resource table. The logic below should first check if there 628 * is a power resource already, falling back to the EFI vars detection 629 * otherwise. 630 */ 631 632 /* Try first to use ACPI to get the clock resource */ 633 if (acpi_device_power_manageable(adev)) 634 clock_num = atomisp_get_acpi_power(dev); 635 636 /* Fall-back use EFI and/or DMI match */ 637 if (clock_num < 0) 638 clock_num = gmin_get_var_int(dev, false, "CamClk", 0); 639 640 if (clock_num < 0 || clock_num > MAX_CLK_COUNT) { 641 dev_err(dev, "Invalid clock number\n"); 642 return -EINVAL; 643 } 644 645 snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name), 646 "%s_%d", "pmc_plt_clk", clock_num); 647 648 gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name); 649 if (IS_ERR(gs->pmc_clk)) { 650 ret = PTR_ERR(gs->pmc_clk); 651 dev_err(dev, "Failed to get clk from %s: %d\n", gmin_pmc_clk_name, ret); 652 return ret; 653 } 654 dev_info(dev, "Will use CLK%d (%s)\n", clock_num, gmin_pmc_clk_name); 655 656 /* 657 * The firmware might enable the clock at 658 * boot (this information may or may not 659 * be reflected in the enable clock register). 660 * To change the rate we must disable the clock 661 * first to cover these cases. Due to common 662 * clock framework restrictions that do not allow 663 * to disable a clock that has not been enabled, 664 * we need to enable the clock first. 665 */ 666 ret = clk_prepare_enable(gs->pmc_clk); 667 if (!ret) 668 clk_disable_unprepare(gs->pmc_clk); 669 670 switch (pmic_id) { 671 case PMIC_REGULATOR: 672 gs->v1p8_reg = regulator_get(dev, "V1P8SX"); 673 gs->v2p8_reg = regulator_get(dev, "V2P8SX"); 674 675 gs->v1p2_reg = regulator_get(dev, "V1P2A"); 676 gs->v2p8_vcm_reg = regulator_get(dev, "VPROG4B"); 677 678 /* Note: ideally we would initialize v[12]p8_on to the 679 * output of regulator_is_enabled(), but sadly that 680 * API is broken with the current drivers, returning 681 * "1" for a regulator that will then emit a 682 * "unbalanced disable" WARNing if we try to disable 683 * it. 684 */ 685 break; 686 687 case PMIC_AXP: 688 gs->eldo1_1p6v = gmin_get_var_int(dev, false, 689 "eldo1_1p8v", 690 ELDO1_1P6V); 691 gs->eldo1_sel_reg = gmin_get_var_int(dev, false, 692 "eldo1_sel_reg", 693 ELDO1_SEL_REG); 694 gs->eldo1_ctrl_shift = gmin_get_var_int(dev, false, 695 "eldo1_ctrl_shift", 696 ELDO1_CTRL_SHIFT); 697 gs->eldo2_1p8v = gmin_get_var_int(dev, false, 698 "eldo2_1p8v", 699 ELDO2_1P8V); 700 gs->eldo2_sel_reg = gmin_get_var_int(dev, false, 701 "eldo2_sel_reg", 702 ELDO2_SEL_REG); 703 gs->eldo2_ctrl_shift = gmin_get_var_int(dev, false, 704 "eldo2_ctrl_shift", 705 ELDO2_CTRL_SHIFT); 706 break; 707 708 default: 709 break; 710 } 711 712 return 0; 713 } 714 715 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev) 716 { 717 int i; 718 719 for (i = 0; i < MAX_SUBDEVS; i++) 720 if (gmin_subdevs[i].subdev == subdev) 721 return &gmin_subdevs[i]; 722 return NULL; 723 } 724 725 static struct gmin_subdev *find_free_gmin_subdev_slot(void) 726 { 727 unsigned int i; 728 729 for (i = 0; i < MAX_SUBDEVS; i++) 730 if (gmin_subdevs[i].subdev == NULL) 731 return &gmin_subdevs[i]; 732 return NULL; 733 } 734 735 static int axp_regulator_set(struct device *dev, struct gmin_subdev *gs, 736 int sel_reg, u8 setting, 737 int ctrl_reg, int shift, bool on) 738 { 739 int ret; 740 int val; 741 742 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, setting, 0xff); 743 if (ret) 744 return ret; 745 746 val = on ? 1 << shift : 0; 747 748 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, ctrl_reg, val, 1 << shift); 749 if (ret) 750 return ret; 751 752 return 0; 753 } 754 755 static int axp_v1p8_on(struct device *dev, struct gmin_subdev *gs) 756 { 757 int ret; 758 759 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 760 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, true); 761 if (ret) 762 return ret; 763 764 /* 765 * This sleep comes out of the gc2235 driver, which is the 766 * only one I currently see that wants to set both 1.8v rails. 767 */ 768 usleep_range(110, 150); 769 770 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p6v, 771 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, true); 772 return ret; 773 } 774 775 static int axp_v1p8_off(struct device *dev, struct gmin_subdev *gs) 776 { 777 int ret; 778 779 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p6v, 780 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, false); 781 if (ret) 782 return ret; 783 784 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v, 785 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false); 786 return ret; 787 } 788 789 static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on) 790 { 791 struct gmin_subdev *gs = find_gmin_subdev(subdev); 792 793 if (gs) { 794 gpiod_set_value(gs->gpio0, on); 795 return 0; 796 } 797 return -EINVAL; 798 } 799 800 static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on) 801 { 802 struct gmin_subdev *gs = find_gmin_subdev(subdev); 803 804 if (gs) { 805 gpiod_set_value(gs->gpio1, on); 806 return 0; 807 } 808 return -EINVAL; 809 } 810 811 static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on) 812 { 813 struct gmin_subdev *gs = find_gmin_subdev(subdev); 814 815 if (!gs || gs->v1p2_on == on) 816 return 0; 817 gs->v1p2_on = on; 818 819 /* use regulator for PMIC */ 820 if (gs->v1p2_reg) { 821 if (on) 822 return regulator_enable(gs->v1p2_reg); 823 else 824 return regulator_disable(gs->v1p2_reg); 825 } 826 827 /* TODO:v1p2 may need to extend to other PMICs */ 828 829 return -EINVAL; 830 } 831 832 static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on) 833 { 834 struct gmin_subdev *gs = find_gmin_subdev(subdev); 835 int ret; 836 int value; 837 838 if (!gs || gs->v1p8_on == on) 839 return 0; 840 841 if (gs->v1p8_gpio >= 0) { 842 pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n", 843 gs->v1p8_gpio); 844 ret = gpio_request(gs->v1p8_gpio, "camera_v1p8_en"); 845 if (!ret) 846 ret = gpio_direction_output(gs->v1p8_gpio, 0); 847 if (ret) 848 pr_err("V1P8 GPIO initialization failed\n"); 849 } 850 851 gs->v1p8_on = on; 852 853 ret = 0; 854 mutex_lock(&gmin_regulator_mutex); 855 if (on) { 856 gmin_v1p8_enable_count++; 857 if (gmin_v1p8_enable_count > 1) 858 goto out; /* Already on */ 859 } else { 860 gmin_v1p8_enable_count--; 861 if (gmin_v1p8_enable_count > 0) 862 goto out; /* Still needed */ 863 } 864 865 if (gs->v1p8_gpio >= 0) 866 gpio_set_value(gs->v1p8_gpio, on); 867 868 if (gs->v1p8_reg) { 869 regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000); 870 if (on) 871 ret = regulator_enable(gs->v1p8_reg); 872 else 873 ret = regulator_disable(gs->v1p8_reg); 874 875 goto out; 876 } 877 878 switch (pmic_id) { 879 case PMIC_AXP: 880 if (on) 881 ret = axp_v1p8_on(subdev->dev, gs); 882 else 883 ret = axp_v1p8_off(subdev->dev, gs); 884 break; 885 case PMIC_TI: 886 value = on ? LDO_1P8V_ON : LDO_1P8V_OFF; 887 888 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 889 LDO10_REG, value, 0xff); 890 break; 891 case PMIC_CRYSTALCOVE: 892 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 893 894 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 895 CRYSTAL_1P8V_REG, value, 0xff); 896 break; 897 default: 898 dev_err(subdev->dev, "Couldn't set power mode for v1p8\n"); 899 ret = -EINVAL; 900 } 901 902 out: 903 mutex_unlock(&gmin_regulator_mutex); 904 return ret; 905 } 906 907 static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on) 908 { 909 struct gmin_subdev *gs = find_gmin_subdev(subdev); 910 int ret; 911 int value; 912 913 if (WARN_ON(!gs)) 914 return -ENODEV; 915 916 if (gs->v2p8_gpio >= 0) { 917 pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n", 918 gs->v2p8_gpio); 919 ret = gpio_request(gs->v2p8_gpio, "camera_v2p8"); 920 if (!ret) 921 ret = gpio_direction_output(gs->v2p8_gpio, 0); 922 if (ret) 923 pr_err("V2P8 GPIO initialization failed\n"); 924 } 925 926 if (gs->v2p8_on == on) 927 return 0; 928 gs->v2p8_on = on; 929 930 ret = 0; 931 mutex_lock(&gmin_regulator_mutex); 932 if (on) { 933 gmin_v2p8_enable_count++; 934 if (gmin_v2p8_enable_count > 1) 935 goto out; /* Already on */ 936 } else { 937 gmin_v2p8_enable_count--; 938 if (gmin_v2p8_enable_count > 0) 939 goto out; /* Still needed */ 940 } 941 942 if (gs->v2p8_gpio >= 0) 943 gpio_set_value(gs->v2p8_gpio, on); 944 945 if (gs->v2p8_reg) { 946 regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000); 947 if (on) 948 ret = regulator_enable(gs->v2p8_reg); 949 else 950 ret = regulator_disable(gs->v2p8_reg); 951 952 goto out; 953 } 954 955 switch (pmic_id) { 956 case PMIC_AXP: 957 ret = axp_regulator_set(subdev->dev, gs, ALDO1_SEL_REG, 958 ALDO1_2P8V, ALDO1_CTRL3_REG, 959 ALDO1_CTRL3_SHIFT, on); 960 break; 961 case PMIC_TI: 962 value = on ? LDO_2P8V_ON : LDO_2P8V_OFF; 963 964 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 965 LDO9_REG, value, 0xff); 966 break; 967 case PMIC_CRYSTALCOVE: 968 value = on ? CRYSTAL_ON : CRYSTAL_OFF; 969 970 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr, 971 CRYSTAL_2P8V_REG, value, 0xff); 972 break; 973 default: 974 dev_err(subdev->dev, "Couldn't set power mode for v2p8\n"); 975 ret = -EINVAL; 976 } 977 978 out: 979 mutex_unlock(&gmin_regulator_mutex); 980 return ret; 981 } 982 983 static int gmin_acpi_pm_ctrl(struct v4l2_subdev *subdev, int on) 984 { 985 int ret = 0; 986 struct gmin_subdev *gs = find_gmin_subdev(subdev); 987 struct i2c_client *client = v4l2_get_subdevdata(subdev); 988 struct acpi_device *adev = ACPI_COMPANION(&client->dev); 989 990 /* Use the ACPI power management to control it */ 991 on = !!on; 992 if (gs->clock_on == on) 993 return 0; 994 995 dev_dbg(subdev->dev, "Setting power state to %s\n", 996 on ? "on" : "off"); 997 998 if (on) 999 ret = acpi_device_set_power(adev, 1000 ACPI_STATE_D0); 1001 else 1002 ret = acpi_device_set_power(adev, 1003 ACPI_STATE_D3_COLD); 1004 1005 if (!ret) 1006 gs->clock_on = on; 1007 else 1008 dev_err(subdev->dev, "Couldn't set power state to %s\n", 1009 on ? "on" : "off"); 1010 1011 return ret; 1012 } 1013 1014 static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on) 1015 { 1016 int ret = 0; 1017 struct gmin_subdev *gs = find_gmin_subdev(subdev); 1018 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1019 1020 if (gs->clock_on == !!on) 1021 return 0; 1022 1023 if (on) { 1024 ret = clk_set_rate(gs->pmc_clk, 1025 gs->clock_src ? CLK_RATE_19_2MHZ : CLK_RATE_25_0MHZ); 1026 1027 if (ret) 1028 dev_err(&client->dev, "unable to set PMC rate %d\n", 1029 gs->clock_src); 1030 1031 ret = clk_prepare_enable(gs->pmc_clk); 1032 if (ret == 0) 1033 gs->clock_on = true; 1034 } else { 1035 clk_disable_unprepare(gs->pmc_clk); 1036 gs->clock_on = false; 1037 } 1038 1039 return ret; 1040 } 1041 1042 static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag) 1043 { 1044 struct i2c_client *client = v4l2_get_subdevdata(sd); 1045 struct gmin_subdev *gs = find_gmin_subdev(sd); 1046 1047 if (!client || !gs) 1048 return -ENODEV; 1049 1050 return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes, 1051 gs->csi_fmt, gs->csi_bayer, flag); 1052 } 1053 1054 static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev, 1055 char *camera_module) 1056 { 1057 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1058 struct gmin_subdev *gs = find_gmin_subdev(subdev); 1059 struct camera_vcm_control *vcm; 1060 1061 if (!client || !gs) 1062 return NULL; 1063 1064 if (!camera_module) 1065 return NULL; 1066 1067 mutex_lock(&vcm_lock); 1068 list_for_each_entry(vcm, &vcm_devices, list) { 1069 if (!strcmp(camera_module, vcm->camera_module)) { 1070 mutex_unlock(&vcm_lock); 1071 return vcm; 1072 } 1073 } 1074 1075 mutex_unlock(&vcm_lock); 1076 return NULL; 1077 } 1078 1079 static struct camera_sensor_platform_data pmic_gmin_plat = { 1080 .gpio0_ctrl = gmin_gpio0_ctrl, 1081 .gpio1_ctrl = gmin_gpio1_ctrl, 1082 .v1p8_ctrl = gmin_v1p8_ctrl, 1083 .v2p8_ctrl = gmin_v2p8_ctrl, 1084 .v1p2_ctrl = gmin_v1p2_ctrl, 1085 .flisclk_ctrl = gmin_flisclk_ctrl, 1086 .csi_cfg = gmin_csi_cfg, 1087 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1088 }; 1089 1090 static struct camera_sensor_platform_data acpi_gmin_plat = { 1091 .gpio0_ctrl = gmin_gpio0_ctrl, 1092 .gpio1_ctrl = gmin_gpio1_ctrl, 1093 .v1p8_ctrl = gmin_acpi_pm_ctrl, 1094 .v2p8_ctrl = gmin_acpi_pm_ctrl, 1095 .v1p2_ctrl = gmin_acpi_pm_ctrl, 1096 .flisclk_ctrl = gmin_acpi_pm_ctrl, 1097 .csi_cfg = gmin_csi_cfg, 1098 .get_vcm_ctrl = gmin_get_vcm_ctrl, 1099 }; 1100 1101 struct camera_sensor_platform_data * 1102 gmin_camera_platform_data(struct v4l2_subdev *subdev, 1103 enum atomisp_input_format csi_format, 1104 enum atomisp_bayer_order csi_bayer) 1105 { 1106 u8 pmic_i2c_addr = gmin_detect_pmic(subdev); 1107 struct gmin_subdev *gs; 1108 1109 gs = find_free_gmin_subdev_slot(); 1110 gs->subdev = subdev; 1111 gs->csi_fmt = csi_format; 1112 gs->csi_bayer = csi_bayer; 1113 gs->pwm_i2c_addr = pmic_i2c_addr; 1114 1115 gmin_subdev_add(gs); 1116 if (gs->pmc_clk) 1117 return &pmic_gmin_plat; 1118 else 1119 return &acpi_gmin_plat; 1120 } 1121 EXPORT_SYMBOL_GPL(gmin_camera_platform_data); 1122 1123 int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl) 1124 { 1125 if (!vcmCtrl) 1126 return -EINVAL; 1127 1128 mutex_lock(&vcm_lock); 1129 list_add_tail(&vcmCtrl->list, &vcm_devices); 1130 mutex_unlock(&vcm_lock); 1131 1132 return 0; 1133 } 1134 EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control); 1135 1136 static int gmin_get_hardcoded_var(struct device *dev, 1137 struct gmin_cfg_var *varlist, 1138 const char *var8, char *out, size_t *out_len) 1139 { 1140 struct gmin_cfg_var *gv; 1141 1142 for (gv = varlist; gv->name; gv++) { 1143 size_t vl; 1144 1145 if (strcmp(var8, gv->name)) 1146 continue; 1147 1148 dev_info(dev, "Found DMI entry for '%s'\n", var8); 1149 1150 vl = strlen(gv->val); 1151 if (vl > *out_len - 1) 1152 return -ENOSPC; 1153 1154 strscpy(out, gv->val, *out_len); 1155 *out_len = vl; 1156 return 0; 1157 } 1158 1159 return -EINVAL; 1160 } 1161 1162 1163 static int gmin_get_config_dsm_var(struct device *dev, 1164 const char *var, 1165 char *out, size_t *out_len) 1166 { 1167 acpi_handle handle = ACPI_HANDLE(dev); 1168 union acpi_object *obj, *cur = NULL; 1169 int i; 1170 1171 /* 1172 * The data reported by "CamClk" seems to be either 0 or 1 at the 1173 * _DSM table. 1174 * 1175 * At the ACPI tables we looked so far, this is not related to the 1176 * actual clock source for the sensor, which is given by the 1177 * _PR0 ACPI table. So, ignore it, as otherwise this will be 1178 * set to a wrong value. 1179 */ 1180 if (!strcmp(var, "CamClk")) 1181 return -EINVAL; 1182 1183 obj = acpi_evaluate_dsm(handle, &atomisp_dsm_guid, 0, 0, NULL); 1184 if (!obj) { 1185 dev_info_once(dev, "Didn't find ACPI _DSM table.\n"); 1186 return -EINVAL; 1187 } 1188 1189 /* Return on unexpected object type */ 1190 if (obj->type != ACPI_TYPE_PACKAGE) 1191 return -EINVAL; 1192 1193 #if 0 /* Just for debugging purposes */ 1194 for (i = 0; i < obj->package.count; i++) { 1195 union acpi_object *cur = &obj->package.elements[i]; 1196 1197 if (cur->type == ACPI_TYPE_INTEGER) 1198 dev_info(dev, "object #%d, type %d, value: %lld\n", 1199 i, cur->type, cur->integer.value); 1200 else if (cur->type == ACPI_TYPE_STRING) 1201 dev_info(dev, "object #%d, type %d, string: %s\n", 1202 i, cur->type, cur->string.pointer); 1203 else 1204 dev_info(dev, "object #%d, type %d\n", 1205 i, cur->type); 1206 } 1207 #endif 1208 1209 /* Seek for the desired var */ 1210 for (i = 0; i < obj->package.count - 1; i += 2) { 1211 if (obj->package.elements[i].type == ACPI_TYPE_STRING && 1212 !strcmp(obj->package.elements[i].string.pointer, var)) { 1213 /* Next element should be the required value */ 1214 cur = &obj->package.elements[i + 1]; 1215 break; 1216 } 1217 } 1218 1219 if (!cur) { 1220 dev_info(dev, "didn't found _DSM entry for '%s'\n", var); 1221 ACPI_FREE(obj); 1222 return -EINVAL; 1223 } 1224 1225 /* 1226 * While it could be possible to have an ACPI_TYPE_INTEGER, 1227 * and read the value from cur->integer.value, the table 1228 * seen so far uses the string type. So, produce a warning 1229 * if it founds something different than string, letting it 1230 * to fall back to the old code. 1231 */ 1232 if (cur && cur->type != ACPI_TYPE_STRING) { 1233 dev_info(dev, "found non-string _DSM entry for '%s'\n", var); 1234 ACPI_FREE(obj); 1235 return -EINVAL; 1236 } 1237 1238 dev_info(dev, "found _DSM entry for '%s': %s\n", var, 1239 cur->string.pointer); 1240 strscpy(out, cur->string.pointer, *out_len); 1241 *out_len = strlen(cur->string.pointer); 1242 1243 ACPI_FREE(obj); 1244 return 0; 1245 } 1246 1247 /* Retrieves a device-specific configuration variable. The dev 1248 * argument should be a device with an ACPI companion, as all 1249 * configuration is based on firmware ID. 1250 */ 1251 static int gmin_get_config_var(struct device *maindev, 1252 bool is_gmin, 1253 const char *var, 1254 char *out, size_t *out_len) 1255 { 1256 efi_char16_t var16[CFG_VAR_NAME_MAX]; 1257 const struct dmi_system_id *id; 1258 struct device *dev = maindev; 1259 char var8[CFG_VAR_NAME_MAX]; 1260 struct efivar_entry *ev; 1261 int i, ret; 1262 1263 /* For sensors, try first to use the _DSM table */ 1264 if (!is_gmin) { 1265 ret = gmin_get_config_dsm_var(maindev, var, out, out_len); 1266 if (!ret) 1267 return 0; 1268 } 1269 1270 /* Fall-back to other approaches */ 1271 1272 if (!is_gmin && ACPI_COMPANION(dev)) 1273 dev = &ACPI_COMPANION(dev)->dev; 1274 1275 if (!is_gmin) 1276 ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var); 1277 else 1278 ret = snprintf(var8, sizeof(var8), "gmin_%s", var); 1279 1280 if (ret < 0 || ret >= sizeof(var8) - 1) 1281 return -EINVAL; 1282 1283 /* First check a hard-coded list of board-specific variables. 1284 * Some device firmwares lack the ability to set EFI variables at 1285 * runtime. 1286 */ 1287 id = dmi_first_match(gmin_vars); 1288 if (id) { 1289 ret = gmin_get_hardcoded_var(maindev, id->driver_data, var8, 1290 out, out_len); 1291 if (!ret) 1292 return 0; 1293 } 1294 1295 /* Our variable names are ASCII by construction, but EFI names 1296 * are wide chars. Convert and zero-pad. 1297 */ 1298 memset(var16, 0, sizeof(var16)); 1299 for (i = 0; i < sizeof(var8) && var8[i]; i++) 1300 var16[i] = var8[i]; 1301 1302 /* Not sure this API usage is kosher; efivar_entry_get()'s 1303 * implementation simply uses VariableName and VendorGuid from 1304 * the struct and ignores the rest, but it seems like there 1305 * ought to be an "official" efivar_entry registered 1306 * somewhere? 1307 */ 1308 ev = kzalloc(sizeof(*ev), GFP_KERNEL); 1309 if (!ev) 1310 return -ENOMEM; 1311 memcpy(&ev->var.VariableName, var16, sizeof(var16)); 1312 ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID; 1313 ev->var.DataSize = *out_len; 1314 1315 ret = efivar_entry_get(ev, &ev->var.Attributes, 1316 &ev->var.DataSize, ev->var.Data); 1317 if (ret == 0) { 1318 memcpy(out, ev->var.Data, ev->var.DataSize); 1319 *out_len = ev->var.DataSize; 1320 dev_info(maindev, "found EFI entry for '%s'\n", var8); 1321 } else if (is_gmin) { 1322 dev_info(maindev, "Failed to find EFI gmin variable %s\n", var8); 1323 } else { 1324 dev_info(maindev, "Failed to find EFI variable %s\n", var8); 1325 } 1326 1327 kfree(ev); 1328 1329 return ret; 1330 } 1331 1332 int gmin_get_var_int(struct device *dev, bool is_gmin, const char *var, int def) 1333 { 1334 char val[CFG_VAR_NAME_MAX]; 1335 size_t len = sizeof(val); 1336 long result; 1337 int ret; 1338 1339 ret = gmin_get_config_var(dev, is_gmin, var, val, &len); 1340 if (!ret) { 1341 val[len] = 0; 1342 ret = kstrtol(val, 0, &result); 1343 } else { 1344 dev_info(dev, "%s: using default (%d)\n", var, def); 1345 } 1346 1347 return ret ? def : result; 1348 } 1349 EXPORT_SYMBOL_GPL(gmin_get_var_int); 1350 1351 int camera_sensor_csi(struct v4l2_subdev *sd, u32 port, 1352 u32 lanes, u32 format, u32 bayer_order, int flag) 1353 { 1354 struct i2c_client *client = v4l2_get_subdevdata(sd); 1355 struct camera_mipi_info *csi = NULL; 1356 1357 if (flag) { 1358 csi = kzalloc(sizeof(*csi), GFP_KERNEL); 1359 if (!csi) 1360 return -ENOMEM; 1361 csi->port = port; 1362 csi->num_lanes = lanes; 1363 csi->input_format = format; 1364 csi->raw_bayer_order = bayer_order; 1365 v4l2_set_subdev_hostdata(sd, (void *)csi); 1366 csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED; 1367 csi->metadata_effective_width = NULL; 1368 dev_info(&client->dev, 1369 "camera pdata: port: %d lanes: %d order: %8.8x\n", 1370 port, lanes, bayer_order); 1371 } else { 1372 csi = v4l2_get_subdev_hostdata(sd); 1373 kfree(csi); 1374 } 1375 1376 return 0; 1377 } 1378 EXPORT_SYMBOL_GPL(camera_sensor_csi); 1379 1380 /* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't 1381 * work. Disable so the kernel framework doesn't hang the device 1382 * trying. The driver itself does direct calls to the PUNIT to manage 1383 * ISP power. 1384 */ 1385 static void isp_pm_cap_fixup(struct pci_dev *pdev) 1386 { 1387 dev_info(&pdev->dev, "Disabling PCI power management on camera ISP\n"); 1388 pdev->pm_cap = 0; 1389 } 1390 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup); 1391 1392 MODULE_DESCRIPTION("Ancillary routines for binding ACPI devices"); 1393 MODULE_LICENSE("GPL"); 1394