1/* 2 * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches 3 * 4 * Copyright (c) 2014 Samsung Electronics Co., Ltd 5 * Author: Chanwoo Choi <cw00.choi@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13#include <linux/err.h> 14#include <linux/i2c.h> 15#include <linux/input.h> 16#include <linux/interrupt.h> 17#include <linux/irqdomain.h> 18#include <linux/kernel.h> 19#include <linux/module.h> 20#include <linux/platform_device.h> 21#include <linux/regmap.h> 22#include <linux/slab.h> 23#include <linux/extcon.h> 24 25#include "extcon-rt8973a.h" 26 27#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ 28 29struct muic_irq { 30 unsigned int irq; 31 const char *name; 32 unsigned int virq; 33}; 34 35struct reg_data { 36 u8 reg; 37 u8 mask; 38 u8 val; 39 bool invert; 40}; 41 42struct rt8973a_muic_info { 43 struct device *dev; 44 struct extcon_dev *edev; 45 46 struct i2c_client *i2c; 47 struct regmap *regmap; 48 49 struct regmap_irq_chip_data *irq_data; 50 struct muic_irq *muic_irqs; 51 unsigned int num_muic_irqs; 52 int irq; 53 bool irq_attach; 54 bool irq_detach; 55 bool irq_ovp; 56 bool irq_otp; 57 struct work_struct irq_work; 58 59 struct reg_data *reg_data; 60 unsigned int num_reg_data; 61 bool auto_config; 62 63 struct mutex mutex; 64 65 /* 66 * Use delayed workqueue to detect cable state and then 67 * notify cable state to notifiee/platform through uevent. 68 * After completing the booting of platform, the extcon provider 69 * driver should notify cable state to upper layer. 70 */ 71 struct delayed_work wq_detcable; 72}; 73 74/* Default value of RT8973A register to bring up MUIC device. */ 75static struct reg_data rt8973a_reg_data[] = { 76 { 77 .reg = RT8973A_REG_CONTROL1, 78 .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK 79 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK 80 | RT8973A_REG_CONTROL1_CHGTYP_MASK 81 | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK 82 | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK 83 | RT8973A_REG_CONTROL1_INTM_MASK, 84 .val = RT8973A_REG_CONTROL1_ADC_EN_MASK 85 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK 86 | RT8973A_REG_CONTROL1_CHGTYP_MASK, 87 .invert = false, 88 }, 89 { /* sentinel */ } 90}; 91 92/* List of detectable cables */ 93enum { 94 EXTCON_CABLE_USB = 0, 95 EXTCON_CABLE_USB_HOST, 96 EXTCON_CABLE_TA, 97 EXTCON_CABLE_JIG_OFF_USB, 98 EXTCON_CABLE_JIG_ON_USB, 99 EXTCON_CABLE_JIG_OFF_UART, 100 EXTCON_CABLE_JIG_ON_UART, 101 102 EXTCON_CABLE_END, 103}; 104 105static const char *rt8973a_extcon_cable[] = { 106 [EXTCON_CABLE_USB] = "USB", 107 [EXTCON_CABLE_USB_HOST] = "USB-Host", 108 [EXTCON_CABLE_TA] = "TA", 109 [EXTCON_CABLE_JIG_OFF_USB] = "JIG-USB-OFF", 110 [EXTCON_CABLE_JIG_ON_USB] = "JIG-USB-ON", 111 [EXTCON_CABLE_JIG_OFF_UART] = "JIG-UART-OFF", 112 [EXTCON_CABLE_JIG_ON_UART] = "JIG-UART-ON", 113 NULL, 114}; 115 116/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ 117enum rt8973a_event_type { 118 RT8973A_EVENT_ATTACH = 1, 119 RT8973A_EVENT_DETACH, 120 RT8973A_EVENT_OVP, 121 RT8973A_EVENT_OTP, 122}; 123 124/* Define supported accessory type */ 125enum rt8973a_muic_acc_type { 126 RT8973A_MUIC_ADC_OTG = 0x0, 127 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, 128 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, 129 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, 130 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, 131 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, 132 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, 133 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, 134 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, 135 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, 136 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, 137 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, 138 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, 139 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, 140 RT8973A_MUIC_ADC_RESERVED_ACC_1, 141 RT8973A_MUIC_ADC_RESERVED_ACC_2, 142 RT8973A_MUIC_ADC_RESERVED_ACC_3, 143 RT8973A_MUIC_ADC_RESERVED_ACC_4, 144 RT8973A_MUIC_ADC_RESERVED_ACC_5, 145 RT8973A_MUIC_ADC_AUDIO_TYPE2, 146 RT8973A_MUIC_ADC_PHONE_POWERED_DEV, 147 RT8973A_MUIC_ADC_UNKNOWN_ACC_1, 148 RT8973A_MUIC_ADC_UNKNOWN_ACC_2, 149 RT8973A_MUIC_ADC_TA, 150 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 151 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 152 RT8973A_MUIC_ADC_UNKNOWN_ACC_3, 153 RT8973A_MUIC_ADC_UNKNOWN_ACC_4, 154 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 155 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 156 RT8973A_MUIC_ADC_UNKNOWN_ACC_5, 157 RT8973A_MUIC_ADC_OPEN = 0x1f, 158 159 /* The below accessories has same ADC value (0x1f). 160 So, Device type1 is used to separate specific accessory. */ 161 /* |---------|--ADC| */ 162 /* | [7:5]|[4:0]| */ 163 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ 164}; 165 166/* List of supported interrupt for RT8973A */ 167static struct muic_irq rt8973a_muic_irqs[] = { 168 { RT8973A_INT1_ATTACH, "muic-attach" }, 169 { RT8973A_INT1_DETACH, "muic-detach" }, 170 { RT8973A_INT1_CHGDET, "muic-chgdet" }, 171 { RT8973A_INT1_DCD_T, "muic-dcd-t" }, 172 { RT8973A_INT1_OVP, "muic-ovp" }, 173 { RT8973A_INT1_CONNECT, "muic-connect" }, 174 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, 175 { RT8973A_INT1_OTP, "muic-otp" }, 176 { RT8973A_INT2_UVLO, "muic-uvlo" }, 177 { RT8973A_INT2_POR, "muic-por" }, 178 { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, 179 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, 180 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, 181 { RT8973A_INT2_OCP, "muic-ocp" }, 182 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, 183}; 184 185/* Define interrupt list of RT8973A to register regmap_irq */ 186static const struct regmap_irq rt8973a_irqs[] = { 187 /* INT1 interrupts */ 188 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, 189 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, 190 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, 191 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, 192 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, 193 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, 194 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, 195 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, 196 197 /* INT2 interrupts */ 198 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, 199 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, 200 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, 201 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, 202 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, 203 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, 204 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, 205}; 206 207static const struct regmap_irq_chip rt8973a_muic_irq_chip = { 208 .name = "rt8973a", 209 .status_base = RT8973A_REG_INT1, 210 .mask_base = RT8973A_REG_INTM1, 211 .mask_invert = false, 212 .num_regs = 2, 213 .irqs = rt8973a_irqs, 214 .num_irqs = ARRAY_SIZE(rt8973a_irqs), 215}; 216 217/* Define regmap configuration of RT8973A for I2C communication */ 218static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) 219{ 220 switch (reg) { 221 case RT8973A_REG_INTM1: 222 case RT8973A_REG_INTM2: 223 return true; 224 default: 225 break; 226 } 227 return false; 228} 229 230static const struct regmap_config rt8973a_muic_regmap_config = { 231 .reg_bits = 8, 232 .val_bits = 8, 233 .volatile_reg = rt8973a_muic_volatile_reg, 234 .max_register = RT8973A_REG_END, 235}; 236 237/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 238static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, 239 unsigned int con_sw, bool attached) 240{ 241 int ret; 242 243 /* 244 * Don't need to set h/w path according to cable type 245 * if Auto-configuration mode of CONTROL1 register is true. 246 */ 247 if (info->auto_config) 248 return 0; 249 250 if (!attached) 251 con_sw = DM_DP_SWITCH_UART; 252 253 switch (con_sw) { 254 case DM_DP_SWITCH_OPEN: 255 case DM_DP_SWITCH_USB: 256 case DM_DP_SWITCH_UART: 257 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, 258 RT8973A_REG_MANUAL_SW1_DP_MASK | 259 RT8973A_REG_MANUAL_SW1_DM_MASK, 260 con_sw); 261 if (ret < 0) { 262 dev_err(info->dev, 263 "cannot update DM_CON/DP_CON switch\n"); 264 return ret; 265 } 266 break; 267 default: 268 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 269 con_sw); 270 return -EINVAL; 271 } 272 273 return 0; 274} 275 276static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) 277{ 278 unsigned int adc, dev1; 279 int ret, cable_type; 280 281 /* Read ADC value according to external cable or button */ 282 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); 283 if (ret) { 284 dev_err(info->dev, "failed to read ADC register\n"); 285 return ret; 286 } 287 cable_type = adc & RT8973A_REG_ADC_MASK; 288 289 /* Read Device 1 reigster to identify correct cable type */ 290 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); 291 if (ret) { 292 dev_err(info->dev, "failed to read DEV1 register\n"); 293 return ret; 294 } 295 296 switch (adc) { 297 case RT8973A_MUIC_ADC_OPEN: 298 if (dev1 & RT8973A_REG_DEV1_USB_MASK) 299 cable_type = RT8973A_MUIC_ADC_USB; 300 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) 301 cable_type = RT8973A_MUIC_ADC_TA; 302 else 303 cable_type = RT8973A_MUIC_ADC_OPEN; 304 break; 305 default: 306 break; 307 } 308 309 return cable_type; 310} 311 312static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, 313 enum rt8973a_event_type event) 314{ 315 static unsigned int prev_cable_type; 316 const char **cable_names = info->edev->supported_cable; 317 unsigned int con_sw = DM_DP_SWITCH_UART; 318 int ret, idx = 0, cable_type; 319 bool attached = false; 320 321 if (!cable_names) 322 return 0; 323 324 switch (event) { 325 case RT8973A_EVENT_ATTACH: 326 cable_type = rt8973a_muic_get_cable_type(info); 327 attached = true; 328 break; 329 case RT8973A_EVENT_DETACH: 330 cable_type = prev_cable_type; 331 attached = false; 332 break; 333 case RT8973A_EVENT_OVP: 334 case RT8973A_EVENT_OTP: 335 dev_warn(info->dev, 336 "happen Over %s issue. Need to disconnect all cables\n", 337 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); 338 cable_type = prev_cable_type; 339 attached = false; 340 break; 341 default: 342 dev_err(info->dev, 343 "Cannot handle this event (event:%d)\n", event); 344 return -EINVAL; 345 } 346 prev_cable_type = cable_type; 347 348 switch (cable_type) { 349 case RT8973A_MUIC_ADC_OTG: 350 idx = EXTCON_CABLE_USB_HOST; 351 con_sw = DM_DP_SWITCH_USB; 352 break; 353 case RT8973A_MUIC_ADC_TA: 354 idx = EXTCON_CABLE_TA; 355 con_sw = DM_DP_SWITCH_OPEN; 356 break; 357 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 358 idx = EXTCON_CABLE_JIG_OFF_USB; 359 con_sw = DM_DP_SWITCH_UART; 360 break; 361 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 362 idx = EXTCON_CABLE_JIG_ON_USB; 363 con_sw = DM_DP_SWITCH_UART; 364 break; 365 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 366 idx = EXTCON_CABLE_JIG_OFF_UART; 367 con_sw = DM_DP_SWITCH_UART; 368 break; 369 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 370 idx = EXTCON_CABLE_JIG_ON_UART; 371 con_sw = DM_DP_SWITCH_UART; 372 break; 373 case RT8973A_MUIC_ADC_USB: 374 idx = EXTCON_CABLE_USB; 375 con_sw = DM_DP_SWITCH_USB; 376 break; 377 case RT8973A_MUIC_ADC_OPEN: 378 return 0; 379 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: 380 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: 381 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: 382 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: 383 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: 384 dev_warn(info->dev, 385 "Unknown accessory type (adc:0x%x)\n", cable_type); 386 return 0; 387 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: 388 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: 389 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: 390 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: 391 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: 392 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: 393 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: 394 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: 395 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: 396 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: 397 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: 398 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: 399 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: 400 case RT8973A_MUIC_ADC_AUDIO_TYPE2: 401 dev_warn(info->dev, 402 "Audio device/button type (adc:0x%x)\n", cable_type); 403 return 0; 404 case RT8973A_MUIC_ADC_RESERVED_ACC_1: 405 case RT8973A_MUIC_ADC_RESERVED_ACC_2: 406 case RT8973A_MUIC_ADC_RESERVED_ACC_3: 407 case RT8973A_MUIC_ADC_RESERVED_ACC_4: 408 case RT8973A_MUIC_ADC_RESERVED_ACC_5: 409 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: 410 return 0; 411 default: 412 dev_err(info->dev, 413 "Cannot handle this cable_type (adc:0x%x)\n", 414 cable_type); 415 return -EINVAL; 416 } 417 418 /* Change internal hardware path(DM_CON/DP_CON) */ 419 ret = rt8973a_muic_set_path(info, con_sw, attached); 420 if (ret < 0) 421 return ret; 422 423 /* Change the state of external accessory */ 424 extcon_set_cable_state(info->edev, cable_names[idx], attached); 425 426 return 0; 427} 428 429static void rt8973a_muic_irq_work(struct work_struct *work) 430{ 431 struct rt8973a_muic_info *info = container_of(work, 432 struct rt8973a_muic_info, irq_work); 433 int ret = 0; 434 435 if (!info->edev) 436 return; 437 438 mutex_lock(&info->mutex); 439 440 /* Detect attached or detached cables */ 441 if (info->irq_attach) { 442 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 443 info->irq_attach = false; 444 } 445 446 if (info->irq_detach) { 447 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); 448 info->irq_detach = false; 449 } 450 451 if (info->irq_ovp) { 452 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); 453 info->irq_ovp = false; 454 } 455 456 if (info->irq_otp) { 457 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); 458 info->irq_otp = false; 459 } 460 461 if (ret < 0) 462 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 463 464 mutex_unlock(&info->mutex); 465} 466 467static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) 468{ 469 struct rt8973a_muic_info *info = data; 470 int i, irq_type = -1; 471 472 for (i = 0; i < info->num_muic_irqs; i++) 473 if (irq == info->muic_irqs[i].virq) 474 irq_type = info->muic_irqs[i].irq; 475 476 switch (irq_type) { 477 case RT8973A_INT1_ATTACH: 478 info->irq_attach = true; 479 break; 480 case RT8973A_INT1_DETACH: 481 info->irq_detach = true; 482 break; 483 case RT8973A_INT1_OVP: 484 info->irq_ovp = true; 485 break; 486 case RT8973A_INT1_OTP: 487 info->irq_otp = true; 488 break; 489 case RT8973A_INT1_CHGDET: 490 case RT8973A_INT1_DCD_T: 491 case RT8973A_INT1_CONNECT: 492 case RT8973A_INT1_ADC_CHG: 493 case RT8973A_INT2_UVLO: 494 case RT8973A_INT2_POR: 495 case RT8973A_INT2_OTP_FET: 496 case RT8973A_INT2_OVP_FET: 497 case RT8973A_INT2_OCP_LATCH: 498 case RT8973A_INT2_OCP: 499 case RT8973A_INT2_OVP_OCP: 500 default: 501 dev_dbg(info->dev, 502 "Cannot handle this interrupt (%d)\n", irq_type); 503 break; 504 } 505 506 schedule_work(&info->irq_work); 507 508 return IRQ_HANDLED; 509} 510 511static void rt8973a_muic_detect_cable_wq(struct work_struct *work) 512{ 513 struct rt8973a_muic_info *info = container_of(to_delayed_work(work), 514 struct rt8973a_muic_info, wq_detcable); 515 int ret; 516 517 /* Notify the state of connector cable or not */ 518 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 519 if (ret < 0) 520 dev_warn(info->dev, "failed to detect cable state\n"); 521} 522 523static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) 524{ 525 unsigned int data, vendor_id, version_id; 526 int i, ret; 527 528 /* To test I2C, Print version_id and vendor_id of RT8973A */ 529 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); 530 if (ret) { 531 dev_err(info->dev, 532 "failed to read DEVICE_ID register: %d\n", ret); 533 return; 534 } 535 536 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> 537 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); 538 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> 539 RT8973A_REG_DEVICE_ID_VERSION_SHIFT); 540 541 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 542 version_id, vendor_id); 543 544 /* Initiazle the register of RT8973A device to bring-up */ 545 for (i = 0; i < info->num_reg_data; i++) { 546 u8 reg = info->reg_data[i].reg; 547 u8 mask = info->reg_data[i].mask; 548 u8 val = 0; 549 550 if (info->reg_data[i].invert) 551 val = ~info->reg_data[i].val; 552 else 553 val = info->reg_data[i].val; 554 555 regmap_update_bits(info->regmap, reg, mask, val); 556 } 557 558 /* Check whether RT8973A is auto swithcing mode or not */ 559 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); 560 if (ret) { 561 dev_err(info->dev, 562 "failed to read CONTROL1 register: %d\n", ret); 563 return; 564 } 565 566 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; 567 if (data) { 568 info->auto_config = true; 569 dev_info(info->dev, 570 "Enable Auto-configuration for internal path\n"); 571 } 572} 573 574static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, 575 const struct i2c_device_id *id) 576{ 577 struct device_node *np = i2c->dev.of_node; 578 struct rt8973a_muic_info *info; 579 int i, ret, irq_flags; 580 581 if (!np) 582 return -EINVAL; 583 584 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 585 if (!info) { 586 dev_err(&i2c->dev, "failed to allocate memory\n"); 587 return -ENOMEM; 588 } 589 i2c_set_clientdata(i2c, info); 590 591 info->dev = &i2c->dev; 592 info->i2c = i2c; 593 info->irq = i2c->irq; 594 info->muic_irqs = rt8973a_muic_irqs; 595 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); 596 info->reg_data = rt8973a_reg_data; 597 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); 598 599 mutex_init(&info->mutex); 600 601 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); 602 603 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); 604 if (IS_ERR(info->regmap)) { 605 ret = PTR_ERR(info->regmap); 606 dev_err(info->dev, "failed to allocate register map: %d\n", 607 ret); 608 return ret; 609 } 610 611 /* Support irq domain for RT8973A MUIC device */ 612 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 613 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 614 &rt8973a_muic_irq_chip, &info->irq_data); 615 if (ret != 0) { 616 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", 617 info->irq, ret); 618 return ret; 619 } 620 621 for (i = 0; i < info->num_muic_irqs; i++) { 622 struct muic_irq *muic_irq = &info->muic_irqs[i]; 623 unsigned int virq = 0; 624 625 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 626 if (virq <= 0) 627 return -EINVAL; 628 muic_irq->virq = virq; 629 630 ret = devm_request_threaded_irq(info->dev, virq, NULL, 631 rt8973a_muic_irq_handler, 632 IRQF_NO_SUSPEND, 633 muic_irq->name, info); 634 if (ret) { 635 dev_err(info->dev, 636 "failed: irq request (IRQ: %d, error :%d)\n", 637 muic_irq->irq, ret); 638 return ret; 639 } 640 } 641 642 /* Allocate extcon device */ 643 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); 644 if (IS_ERR(info->edev)) { 645 dev_err(info->dev, "failed to allocate memory for extcon\n"); 646 return -ENOMEM; 647 } 648 info->edev->name = np->name; 649 650 /* Register extcon device */ 651 ret = devm_extcon_dev_register(info->dev, info->edev); 652 if (ret) { 653 dev_err(info->dev, "failed to register extcon device\n"); 654 return ret; 655 } 656 657 /* 658 * Detect accessory after completing the initialization of platform 659 * 660 * - Use delayed workqueue to detect cable state and then 661 * notify cable state to notifiee/platform through uevent. 662 * After completing the booting of platform, the extcon provider 663 * driver should notify cable state to upper layer. 664 */ 665 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); 666 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 667 msecs_to_jiffies(DELAY_MS_DEFAULT)); 668 669 /* Initialize RT8973A device and print vendor id and version id */ 670 rt8973a_init_dev_type(info); 671 672 return 0; 673} 674 675static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) 676{ 677 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 678 679 regmap_del_irq_chip(info->irq, info->irq_data); 680 681 return 0; 682} 683 684static struct of_device_id rt8973a_dt_match[] = { 685 { .compatible = "richtek,rt8973a-muic" }, 686 { }, 687}; 688 689#ifdef CONFIG_PM_SLEEP 690static int rt8973a_muic_suspend(struct device *dev) 691{ 692 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 693 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 694 695 enable_irq_wake(info->irq); 696 697 return 0; 698} 699 700static int rt8973a_muic_resume(struct device *dev) 701{ 702 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 703 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 704 705 disable_irq_wake(info->irq); 706 707 return 0; 708} 709#endif 710 711static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, 712 rt8973a_muic_suspend, rt8973a_muic_resume); 713 714static const struct i2c_device_id rt8973a_i2c_id[] = { 715 { "rt8973a", TYPE_RT8973A }, 716 { } 717}; 718MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); 719 720static struct i2c_driver rt8973a_muic_i2c_driver = { 721 .driver = { 722 .name = "rt8973a", 723 .owner = THIS_MODULE, 724 .pm = &rt8973a_muic_pm_ops, 725 .of_match_table = rt8973a_dt_match, 726 }, 727 .probe = rt8973a_muic_i2c_probe, 728 .remove = rt8973a_muic_i2c_remove, 729 .id_table = rt8973a_i2c_id, 730}; 731 732static int __init rt8973a_muic_i2c_init(void) 733{ 734 return i2c_add_driver(&rt8973a_muic_i2c_driver); 735} 736subsys_initcall(rt8973a_muic_i2c_init); 737 738MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); 739MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 740MODULE_LICENSE("GPL"); 741