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 29 struct muic_irq { 30 unsigned int irq; 31 const char *name; 32 unsigned int virq; 33 }; 34 35 struct reg_data { 36 u8 reg; 37 u8 mask; 38 u8 val; 39 bool invert; 40 }; 41 42 struct 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. */ 75 static 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 */ 93 static const unsigned int rt8973a_extcon_cable[] = { 94 EXTCON_USB, 95 EXTCON_USB_HOST, 96 EXTCON_CHG_USB_SDP, 97 EXTCON_CHG_USB_DCP, 98 EXTCON_JIG, 99 EXTCON_NONE, 100 }; 101 102 /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ 103 enum rt8973a_event_type { 104 RT8973A_EVENT_ATTACH = 1, 105 RT8973A_EVENT_DETACH, 106 RT8973A_EVENT_OVP, 107 RT8973A_EVENT_OTP, 108 }; 109 110 /* Define supported accessory type */ 111 enum rt8973a_muic_acc_type { 112 RT8973A_MUIC_ADC_OTG = 0x0, 113 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, 114 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, 115 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, 116 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, 117 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, 118 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, 119 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, 120 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, 121 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, 122 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, 123 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, 124 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, 125 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, 126 RT8973A_MUIC_ADC_RESERVED_ACC_1, 127 RT8973A_MUIC_ADC_RESERVED_ACC_2, 128 RT8973A_MUIC_ADC_RESERVED_ACC_3, 129 RT8973A_MUIC_ADC_RESERVED_ACC_4, 130 RT8973A_MUIC_ADC_RESERVED_ACC_5, 131 RT8973A_MUIC_ADC_AUDIO_TYPE2, 132 RT8973A_MUIC_ADC_PHONE_POWERED_DEV, 133 RT8973A_MUIC_ADC_UNKNOWN_ACC_1, 134 RT8973A_MUIC_ADC_UNKNOWN_ACC_2, 135 RT8973A_MUIC_ADC_TA, 136 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 137 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 138 RT8973A_MUIC_ADC_UNKNOWN_ACC_3, 139 RT8973A_MUIC_ADC_UNKNOWN_ACC_4, 140 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 141 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 142 RT8973A_MUIC_ADC_UNKNOWN_ACC_5, 143 RT8973A_MUIC_ADC_OPEN = 0x1f, 144 145 /* 146 * The below accessories has same ADC value (0x1f). 147 * So, Device type1 is used to separate specific accessory. 148 */ 149 /* |---------|--ADC| */ 150 /* | [7:5]|[4:0]| */ 151 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ 152 }; 153 154 /* List of supported interrupt for RT8973A */ 155 static struct muic_irq rt8973a_muic_irqs[] = { 156 { RT8973A_INT1_ATTACH, "muic-attach" }, 157 { RT8973A_INT1_DETACH, "muic-detach" }, 158 { RT8973A_INT1_CHGDET, "muic-chgdet" }, 159 { RT8973A_INT1_DCD_T, "muic-dcd-t" }, 160 { RT8973A_INT1_OVP, "muic-ovp" }, 161 { RT8973A_INT1_CONNECT, "muic-connect" }, 162 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, 163 { RT8973A_INT1_OTP, "muic-otp" }, 164 { RT8973A_INT2_UVLO, "muic-uvlo" }, 165 { RT8973A_INT2_POR, "muic-por" }, 166 { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, 167 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, 168 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, 169 { RT8973A_INT2_OCP, "muic-ocp" }, 170 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, 171 }; 172 173 /* Define interrupt list of RT8973A to register regmap_irq */ 174 static const struct regmap_irq rt8973a_irqs[] = { 175 /* INT1 interrupts */ 176 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, 177 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, 178 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, 179 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, 180 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, 181 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, 182 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, 183 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, 184 185 /* INT2 interrupts */ 186 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, 187 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, 188 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, 189 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, 190 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, 191 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, 192 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, 193 }; 194 195 static const struct regmap_irq_chip rt8973a_muic_irq_chip = { 196 .name = "rt8973a", 197 .status_base = RT8973A_REG_INT1, 198 .mask_base = RT8973A_REG_INTM1, 199 .mask_invert = false, 200 .num_regs = 2, 201 .irqs = rt8973a_irqs, 202 .num_irqs = ARRAY_SIZE(rt8973a_irqs), 203 }; 204 205 /* Define regmap configuration of RT8973A for I2C communication */ 206 static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) 207 { 208 switch (reg) { 209 case RT8973A_REG_INTM1: 210 case RT8973A_REG_INTM2: 211 return true; 212 default: 213 break; 214 } 215 return false; 216 } 217 218 static const struct regmap_config rt8973a_muic_regmap_config = { 219 .reg_bits = 8, 220 .val_bits = 8, 221 .volatile_reg = rt8973a_muic_volatile_reg, 222 .max_register = RT8973A_REG_END, 223 }; 224 225 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 226 static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, 227 unsigned int con_sw, bool attached) 228 { 229 int ret; 230 231 /* 232 * Don't need to set h/w path according to cable type 233 * if Auto-configuration mode of CONTROL1 register is true. 234 */ 235 if (info->auto_config) 236 return 0; 237 238 if (!attached) 239 con_sw = DM_DP_SWITCH_UART; 240 241 switch (con_sw) { 242 case DM_DP_SWITCH_OPEN: 243 case DM_DP_SWITCH_USB: 244 case DM_DP_SWITCH_UART: 245 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, 246 RT8973A_REG_MANUAL_SW1_DP_MASK | 247 RT8973A_REG_MANUAL_SW1_DM_MASK, 248 con_sw); 249 if (ret < 0) { 250 dev_err(info->dev, 251 "cannot update DM_CON/DP_CON switch\n"); 252 return ret; 253 } 254 break; 255 default: 256 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 257 con_sw); 258 return -EINVAL; 259 } 260 261 return 0; 262 } 263 264 static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) 265 { 266 unsigned int adc, dev1; 267 int ret, cable_type; 268 269 /* Read ADC value according to external cable or button */ 270 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); 271 if (ret) { 272 dev_err(info->dev, "failed to read ADC register\n"); 273 return ret; 274 } 275 cable_type = adc & RT8973A_REG_ADC_MASK; 276 277 /* Read Device 1 reigster to identify correct cable type */ 278 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); 279 if (ret) { 280 dev_err(info->dev, "failed to read DEV1 register\n"); 281 return ret; 282 } 283 284 switch (adc) { 285 case RT8973A_MUIC_ADC_OPEN: 286 if (dev1 & RT8973A_REG_DEV1_USB_MASK) 287 cable_type = RT8973A_MUIC_ADC_USB; 288 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) 289 cable_type = RT8973A_MUIC_ADC_TA; 290 else 291 cable_type = RT8973A_MUIC_ADC_OPEN; 292 break; 293 default: 294 break; 295 } 296 297 return cable_type; 298 } 299 300 static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, 301 enum rt8973a_event_type event) 302 { 303 static unsigned int prev_cable_type; 304 unsigned int con_sw = DM_DP_SWITCH_UART; 305 int ret, cable_type; 306 unsigned int id; 307 bool attached = false; 308 309 switch (event) { 310 case RT8973A_EVENT_ATTACH: 311 cable_type = rt8973a_muic_get_cable_type(info); 312 attached = true; 313 break; 314 case RT8973A_EVENT_DETACH: 315 cable_type = prev_cable_type; 316 attached = false; 317 break; 318 case RT8973A_EVENT_OVP: 319 case RT8973A_EVENT_OTP: 320 dev_warn(info->dev, 321 "happen Over %s issue. Need to disconnect all cables\n", 322 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); 323 cable_type = prev_cable_type; 324 attached = false; 325 break; 326 default: 327 dev_err(info->dev, 328 "Cannot handle this event (event:%d)\n", event); 329 return -EINVAL; 330 } 331 prev_cable_type = cable_type; 332 333 switch (cable_type) { 334 case RT8973A_MUIC_ADC_OTG: 335 id = EXTCON_USB_HOST; 336 con_sw = DM_DP_SWITCH_USB; 337 break; 338 case RT8973A_MUIC_ADC_TA: 339 id = EXTCON_CHG_USB_DCP; 340 con_sw = DM_DP_SWITCH_OPEN; 341 break; 342 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 343 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 344 id = EXTCON_JIG; 345 con_sw = DM_DP_SWITCH_USB; 346 break; 347 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 348 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 349 id = EXTCON_JIG; 350 con_sw = DM_DP_SWITCH_UART; 351 break; 352 case RT8973A_MUIC_ADC_USB: 353 id = EXTCON_USB; 354 con_sw = DM_DP_SWITCH_USB; 355 break; 356 case RT8973A_MUIC_ADC_OPEN: 357 return 0; 358 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: 359 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: 360 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: 361 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: 362 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: 363 dev_warn(info->dev, 364 "Unknown accessory type (adc:0x%x)\n", cable_type); 365 return 0; 366 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: 367 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: 368 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: 369 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: 370 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: 371 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: 372 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: 373 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: 374 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: 375 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: 376 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: 377 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: 378 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: 379 case RT8973A_MUIC_ADC_AUDIO_TYPE2: 380 dev_warn(info->dev, 381 "Audio device/button type (adc:0x%x)\n", cable_type); 382 return 0; 383 case RT8973A_MUIC_ADC_RESERVED_ACC_1: 384 case RT8973A_MUIC_ADC_RESERVED_ACC_2: 385 case RT8973A_MUIC_ADC_RESERVED_ACC_3: 386 case RT8973A_MUIC_ADC_RESERVED_ACC_4: 387 case RT8973A_MUIC_ADC_RESERVED_ACC_5: 388 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: 389 return 0; 390 default: 391 dev_err(info->dev, 392 "Cannot handle this cable_type (adc:0x%x)\n", 393 cable_type); 394 return -EINVAL; 395 } 396 397 /* Change internal hardware path(DM_CON/DP_CON) */ 398 ret = rt8973a_muic_set_path(info, con_sw, attached); 399 if (ret < 0) 400 return ret; 401 402 /* Change the state of external accessory */ 403 extcon_set_state_sync(info->edev, id, attached); 404 if (id == EXTCON_USB) 405 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 406 attached); 407 408 return 0; 409 } 410 411 static void rt8973a_muic_irq_work(struct work_struct *work) 412 { 413 struct rt8973a_muic_info *info = container_of(work, 414 struct rt8973a_muic_info, irq_work); 415 int ret = 0; 416 417 if (!info->edev) 418 return; 419 420 mutex_lock(&info->mutex); 421 422 /* Detect attached or detached cables */ 423 if (info->irq_attach) { 424 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 425 info->irq_attach = false; 426 } 427 428 if (info->irq_detach) { 429 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); 430 info->irq_detach = false; 431 } 432 433 if (info->irq_ovp) { 434 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); 435 info->irq_ovp = false; 436 } 437 438 if (info->irq_otp) { 439 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); 440 info->irq_otp = false; 441 } 442 443 if (ret < 0) 444 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 445 446 mutex_unlock(&info->mutex); 447 } 448 449 static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) 450 { 451 struct rt8973a_muic_info *info = data; 452 int i, irq_type = -1; 453 454 for (i = 0; i < info->num_muic_irqs; i++) 455 if (irq == info->muic_irqs[i].virq) 456 irq_type = info->muic_irqs[i].irq; 457 458 switch (irq_type) { 459 case RT8973A_INT1_ATTACH: 460 info->irq_attach = true; 461 break; 462 case RT8973A_INT1_DETACH: 463 info->irq_detach = true; 464 break; 465 case RT8973A_INT1_OVP: 466 info->irq_ovp = true; 467 break; 468 case RT8973A_INT1_OTP: 469 info->irq_otp = true; 470 break; 471 case RT8973A_INT1_CHGDET: 472 case RT8973A_INT1_DCD_T: 473 case RT8973A_INT1_CONNECT: 474 case RT8973A_INT1_ADC_CHG: 475 case RT8973A_INT2_UVLO: 476 case RT8973A_INT2_POR: 477 case RT8973A_INT2_OTP_FET: 478 case RT8973A_INT2_OVP_FET: 479 case RT8973A_INT2_OCP_LATCH: 480 case RT8973A_INT2_OCP: 481 case RT8973A_INT2_OVP_OCP: 482 default: 483 dev_dbg(info->dev, 484 "Cannot handle this interrupt (%d)\n", irq_type); 485 break; 486 } 487 488 schedule_work(&info->irq_work); 489 490 return IRQ_HANDLED; 491 } 492 493 static void rt8973a_muic_detect_cable_wq(struct work_struct *work) 494 { 495 struct rt8973a_muic_info *info = container_of(to_delayed_work(work), 496 struct rt8973a_muic_info, wq_detcable); 497 int ret; 498 499 /* Notify the state of connector cable or not */ 500 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 501 if (ret < 0) 502 dev_warn(info->dev, "failed to detect cable state\n"); 503 } 504 505 static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) 506 { 507 unsigned int data, vendor_id, version_id; 508 int i, ret; 509 510 /* To test I2C, Print version_id and vendor_id of RT8973A */ 511 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); 512 if (ret) { 513 dev_err(info->dev, 514 "failed to read DEVICE_ID register: %d\n", ret); 515 return; 516 } 517 518 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> 519 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); 520 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> 521 RT8973A_REG_DEVICE_ID_VERSION_SHIFT); 522 523 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 524 version_id, vendor_id); 525 526 /* Initiazle the register of RT8973A device to bring-up */ 527 for (i = 0; i < info->num_reg_data; i++) { 528 u8 reg = info->reg_data[i].reg; 529 u8 mask = info->reg_data[i].mask; 530 u8 val = 0; 531 532 if (info->reg_data[i].invert) 533 val = ~info->reg_data[i].val; 534 else 535 val = info->reg_data[i].val; 536 537 regmap_update_bits(info->regmap, reg, mask, val); 538 } 539 540 /* Check whether RT8973A is auto switching mode or not */ 541 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); 542 if (ret) { 543 dev_err(info->dev, 544 "failed to read CONTROL1 register: %d\n", ret); 545 return; 546 } 547 548 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; 549 if (data) { 550 info->auto_config = true; 551 dev_info(info->dev, 552 "Enable Auto-configuration for internal path\n"); 553 } 554 } 555 556 static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, 557 const struct i2c_device_id *id) 558 { 559 struct device_node *np = i2c->dev.of_node; 560 struct rt8973a_muic_info *info; 561 int i, ret, irq_flags; 562 563 if (!np) 564 return -EINVAL; 565 566 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 567 if (!info) 568 return -ENOMEM; 569 i2c_set_clientdata(i2c, info); 570 571 info->dev = &i2c->dev; 572 info->i2c = i2c; 573 info->irq = i2c->irq; 574 info->muic_irqs = rt8973a_muic_irqs; 575 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); 576 info->reg_data = rt8973a_reg_data; 577 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); 578 579 mutex_init(&info->mutex); 580 581 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); 582 583 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); 584 if (IS_ERR(info->regmap)) { 585 ret = PTR_ERR(info->regmap); 586 dev_err(info->dev, "failed to allocate register map: %d\n", 587 ret); 588 return ret; 589 } 590 591 /* Support irq domain for RT8973A MUIC device */ 592 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 593 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 594 &rt8973a_muic_irq_chip, &info->irq_data); 595 if (ret != 0) { 596 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", 597 info->irq, ret); 598 return ret; 599 } 600 601 for (i = 0; i < info->num_muic_irqs; i++) { 602 struct muic_irq *muic_irq = &info->muic_irqs[i]; 603 int virq = 0; 604 605 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 606 if (virq <= 0) 607 return -EINVAL; 608 muic_irq->virq = virq; 609 610 ret = devm_request_threaded_irq(info->dev, virq, NULL, 611 rt8973a_muic_irq_handler, 612 IRQF_NO_SUSPEND | IRQF_ONESHOT, 613 muic_irq->name, info); 614 if (ret) { 615 dev_err(info->dev, 616 "failed: irq request (IRQ: %d, error :%d)\n", 617 muic_irq->irq, ret); 618 return ret; 619 } 620 } 621 622 /* Allocate extcon device */ 623 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); 624 if (IS_ERR(info->edev)) { 625 dev_err(info->dev, "failed to allocate memory for extcon\n"); 626 return -ENOMEM; 627 } 628 629 /* Register extcon device */ 630 ret = devm_extcon_dev_register(info->dev, info->edev); 631 if (ret) { 632 dev_err(info->dev, "failed to register extcon device\n"); 633 return ret; 634 } 635 636 /* 637 * Detect accessory after completing the initialization of platform 638 * 639 * - Use delayed workqueue to detect cable state and then 640 * notify cable state to notifiee/platform through uevent. 641 * After completing the booting of platform, the extcon provider 642 * driver should notify cable state to upper layer. 643 */ 644 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); 645 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 646 msecs_to_jiffies(DELAY_MS_DEFAULT)); 647 648 /* Initialize RT8973A device and print vendor id and version id */ 649 rt8973a_init_dev_type(info); 650 651 return 0; 652 } 653 654 static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) 655 { 656 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 657 658 regmap_del_irq_chip(info->irq, info->irq_data); 659 660 return 0; 661 } 662 663 static const struct of_device_id rt8973a_dt_match[] = { 664 { .compatible = "richtek,rt8973a-muic" }, 665 { }, 666 }; 667 MODULE_DEVICE_TABLE(of, rt8973a_dt_match); 668 669 #ifdef CONFIG_PM_SLEEP 670 static int rt8973a_muic_suspend(struct device *dev) 671 { 672 struct i2c_client *i2c = to_i2c_client(dev); 673 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 674 675 enable_irq_wake(info->irq); 676 677 return 0; 678 } 679 680 static int rt8973a_muic_resume(struct device *dev) 681 { 682 struct i2c_client *i2c = to_i2c_client(dev); 683 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 684 685 disable_irq_wake(info->irq); 686 687 return 0; 688 } 689 #endif 690 691 static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, 692 rt8973a_muic_suspend, rt8973a_muic_resume); 693 694 static const struct i2c_device_id rt8973a_i2c_id[] = { 695 { "rt8973a", TYPE_RT8973A }, 696 { } 697 }; 698 MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); 699 700 static struct i2c_driver rt8973a_muic_i2c_driver = { 701 .driver = { 702 .name = "rt8973a", 703 .pm = &rt8973a_muic_pm_ops, 704 .of_match_table = rt8973a_dt_match, 705 }, 706 .probe = rt8973a_muic_i2c_probe, 707 .remove = rt8973a_muic_i2c_remove, 708 .id_table = rt8973a_i2c_id, 709 }; 710 711 static int __init rt8973a_muic_i2c_init(void) 712 { 713 return i2c_add_driver(&rt8973a_muic_i2c_driver); 714 } 715 subsys_initcall(rt8973a_muic_i2c_init); 716 717 MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); 718 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 719 MODULE_LICENSE("GPL"); 720