1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches 4 * 5 * Copyright (c) 2014 Samsung Electronics Co., Ltd 6 * Author: Chanwoo Choi <cw00.choi@samsung.com> 7 */ 8 9 #include <linux/err.h> 10 #include <linux/i2c.h> 11 #include <linux/interrupt.h> 12 #include <linux/irqdomain.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/regmap.h> 17 #include <linux/slab.h> 18 #include <linux/extcon-provider.h> 19 20 #include "extcon-sm5502.h" 21 22 #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ 23 24 struct muic_irq { 25 unsigned int irq; 26 const char *name; 27 unsigned int virq; 28 }; 29 30 struct reg_data { 31 u8 reg; 32 unsigned int val; 33 bool invert; 34 }; 35 36 struct sm5502_muic_info { 37 struct device *dev; 38 struct extcon_dev *edev; 39 40 struct i2c_client *i2c; 41 struct regmap *regmap; 42 43 struct regmap_irq_chip_data *irq_data; 44 struct muic_irq *muic_irqs; 45 unsigned int num_muic_irqs; 46 int irq; 47 bool irq_attach; 48 bool irq_detach; 49 struct work_struct irq_work; 50 51 struct reg_data *reg_data; 52 unsigned int num_reg_data; 53 54 struct mutex mutex; 55 56 /* 57 * Use delayed workqueue to detect cable state and then 58 * notify cable state to notifiee/platform through uevent. 59 * After completing the booting of platform, the extcon provider 60 * driver should notify cable state to upper layer. 61 */ 62 struct delayed_work wq_detcable; 63 }; 64 65 /* Default value of SM5502 register to bring up MUIC device. */ 66 static struct reg_data sm5502_reg_data[] = { 67 { 68 .reg = SM5502_REG_RESET, 69 .val = SM5502_REG_RESET_MASK, 70 .invert = true, 71 }, { 72 .reg = SM5502_REG_CONTROL, 73 .val = SM5502_REG_CONTROL_MASK_INT_MASK, 74 .invert = false, 75 }, { 76 .reg = SM5502_REG_INTMASK1, 77 .val = SM5502_REG_INTM1_KP_MASK 78 | SM5502_REG_INTM1_LKP_MASK 79 | SM5502_REG_INTM1_LKR_MASK, 80 .invert = true, 81 }, { 82 .reg = SM5502_REG_INTMASK2, 83 .val = SM5502_REG_INTM2_VBUS_DET_MASK 84 | SM5502_REG_INTM2_REV_ACCE_MASK 85 | SM5502_REG_INTM2_ADC_CHG_MASK 86 | SM5502_REG_INTM2_STUCK_KEY_MASK 87 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK 88 | SM5502_REG_INTM2_MHL_MASK, 89 .invert = true, 90 }, 91 { } 92 }; 93 94 /* List of detectable cables */ 95 static const unsigned int sm5502_extcon_cable[] = { 96 EXTCON_USB, 97 EXTCON_USB_HOST, 98 EXTCON_CHG_USB_SDP, 99 EXTCON_CHG_USB_DCP, 100 EXTCON_NONE, 101 }; 102 103 /* Define supported accessory type */ 104 enum sm5502_muic_acc_type { 105 SM5502_MUIC_ADC_GROUND = 0x0, 106 SM5502_MUIC_ADC_SEND_END_BUTTON, 107 SM5502_MUIC_ADC_REMOTE_S1_BUTTON, 108 SM5502_MUIC_ADC_REMOTE_S2_BUTTON, 109 SM5502_MUIC_ADC_REMOTE_S3_BUTTON, 110 SM5502_MUIC_ADC_REMOTE_S4_BUTTON, 111 SM5502_MUIC_ADC_REMOTE_S5_BUTTON, 112 SM5502_MUIC_ADC_REMOTE_S6_BUTTON, 113 SM5502_MUIC_ADC_REMOTE_S7_BUTTON, 114 SM5502_MUIC_ADC_REMOTE_S8_BUTTON, 115 SM5502_MUIC_ADC_REMOTE_S9_BUTTON, 116 SM5502_MUIC_ADC_REMOTE_S10_BUTTON, 117 SM5502_MUIC_ADC_REMOTE_S11_BUTTON, 118 SM5502_MUIC_ADC_REMOTE_S12_BUTTON, 119 SM5502_MUIC_ADC_RESERVED_ACC_1, 120 SM5502_MUIC_ADC_RESERVED_ACC_2, 121 SM5502_MUIC_ADC_RESERVED_ACC_3, 122 SM5502_MUIC_ADC_RESERVED_ACC_4, 123 SM5502_MUIC_ADC_RESERVED_ACC_5, 124 SM5502_MUIC_ADC_AUDIO_TYPE2, 125 SM5502_MUIC_ADC_PHONE_POWERED_DEV, 126 SM5502_MUIC_ADC_TTY_CONVERTER, 127 SM5502_MUIC_ADC_UART_CABLE, 128 SM5502_MUIC_ADC_TYPE1_CHARGER, 129 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 130 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 131 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, 132 SM5502_MUIC_ADC_TYPE2_CHARGER, 133 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 134 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 135 SM5502_MUIC_ADC_AUDIO_TYPE1, 136 SM5502_MUIC_ADC_OPEN = 0x1f, 137 138 /* 139 * The below accessories have same ADC value (0x1f or 0x1e). 140 * So, Device type1 is used to separate specific accessory. 141 */ 142 /* |---------|--ADC| */ 143 /* | [7:5]|[4:0]| */ 144 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ 145 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ 146 /* |Dev Type1|--ADC| */ 147 SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */ 148 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ 149 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ 150 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ 151 }; 152 153 /* List of supported interrupt for SM5502 */ 154 static struct muic_irq sm5502_muic_irqs[] = { 155 { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, 156 { SM5502_IRQ_INT1_DETACH, "muic-detach" }, 157 { SM5502_IRQ_INT1_KP, "muic-kp" }, 158 { SM5502_IRQ_INT1_LKP, "muic-lkp" }, 159 { SM5502_IRQ_INT1_LKR, "muic-lkr" }, 160 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, 161 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, 162 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, 163 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, 164 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, 165 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, 166 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, 167 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, 168 { SM5502_IRQ_INT2_MHL, "muic-mhl" }, 169 }; 170 171 /* Define interrupt list of SM5502 to register regmap_irq */ 172 static const struct regmap_irq sm5502_irqs[] = { 173 /* INT1 interrupts */ 174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, 175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, 176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, 177 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, 178 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, 179 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, 180 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, 181 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, 182 183 /* INT2 interrupts */ 184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, 185 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, 186 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, 187 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, 188 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, 189 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, 190 }; 191 192 static const struct regmap_irq_chip sm5502_muic_irq_chip = { 193 .name = "sm5502", 194 .status_base = SM5502_REG_INT1, 195 .mask_base = SM5502_REG_INTMASK1, 196 .mask_invert = false, 197 .num_regs = 2, 198 .irqs = sm5502_irqs, 199 .num_irqs = ARRAY_SIZE(sm5502_irqs), 200 }; 201 202 /* Define regmap configuration of SM5502 for I2C communication */ 203 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) 204 { 205 switch (reg) { 206 case SM5502_REG_INTMASK1: 207 case SM5502_REG_INTMASK2: 208 return true; 209 default: 210 break; 211 } 212 return false; 213 } 214 215 static const struct regmap_config sm5502_muic_regmap_config = { 216 .reg_bits = 8, 217 .val_bits = 8, 218 .volatile_reg = sm5502_muic_volatile_reg, 219 .max_register = SM5502_REG_END, 220 }; 221 222 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 223 static int sm5502_muic_set_path(struct sm5502_muic_info *info, 224 unsigned int con_sw, unsigned int vbus_sw, 225 bool attached) 226 { 227 int ret; 228 229 if (!attached) { 230 con_sw = DM_DP_SWITCH_OPEN; 231 vbus_sw = VBUSIN_SWITCH_OPEN; 232 } 233 234 switch (con_sw) { 235 case DM_DP_SWITCH_OPEN: 236 case DM_DP_SWITCH_USB: 237 case DM_DP_SWITCH_AUDIO: 238 case DM_DP_SWITCH_UART: 239 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 240 SM5502_REG_MANUAL_SW1_DP_MASK | 241 SM5502_REG_MANUAL_SW1_DM_MASK, 242 con_sw); 243 if (ret < 0) { 244 dev_err(info->dev, 245 "cannot update DM_CON/DP_CON switch\n"); 246 return ret; 247 } 248 break; 249 default: 250 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 251 con_sw); 252 return -EINVAL; 253 } 254 255 switch (vbus_sw) { 256 case VBUSIN_SWITCH_OPEN: 257 case VBUSIN_SWITCH_VBUSOUT: 258 case VBUSIN_SWITCH_MIC: 259 case VBUSIN_SWITCH_VBUSOUT_WITH_USB: 260 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 261 SM5502_REG_MANUAL_SW1_VBUSIN_MASK, 262 vbus_sw); 263 if (ret < 0) { 264 dev_err(info->dev, 265 "cannot update VBUSIN switch\n"); 266 return ret; 267 } 268 break; 269 default: 270 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); 271 return -EINVAL; 272 } 273 274 return 0; 275 } 276 277 /* Return cable type of attached or detached accessories */ 278 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) 279 { 280 unsigned int cable_type, adc, dev_type1; 281 int ret; 282 283 /* Read ADC value according to external cable or button */ 284 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); 285 if (ret) { 286 dev_err(info->dev, "failed to read ADC register\n"); 287 return ret; 288 } 289 290 /* 291 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't 292 * connected with to MUIC device. 293 */ 294 cable_type = adc & SM5502_REG_ADC_MASK; 295 296 switch (cable_type) { 297 case SM5502_MUIC_ADC_GROUND: 298 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, 299 &dev_type1); 300 if (ret) { 301 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); 302 return ret; 303 } 304 305 switch (dev_type1) { 306 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: 307 cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG; 308 break; 309 default: 310 dev_dbg(info->dev, 311 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n", 312 adc, dev_type1); 313 return -EINVAL; 314 } 315 break; 316 case SM5502_MUIC_ADC_SEND_END_BUTTON: 317 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: 318 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: 319 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: 320 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: 321 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: 322 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: 323 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: 324 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: 325 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: 326 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: 327 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: 328 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: 329 case SM5502_MUIC_ADC_RESERVED_ACC_1: 330 case SM5502_MUIC_ADC_RESERVED_ACC_2: 331 case SM5502_MUIC_ADC_RESERVED_ACC_3: 332 case SM5502_MUIC_ADC_RESERVED_ACC_4: 333 case SM5502_MUIC_ADC_RESERVED_ACC_5: 334 case SM5502_MUIC_ADC_AUDIO_TYPE2: 335 case SM5502_MUIC_ADC_PHONE_POWERED_DEV: 336 case SM5502_MUIC_ADC_TTY_CONVERTER: 337 case SM5502_MUIC_ADC_UART_CABLE: 338 case SM5502_MUIC_ADC_TYPE1_CHARGER: 339 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 340 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 341 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: 342 case SM5502_MUIC_ADC_TYPE2_CHARGER: 343 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 344 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 345 break; 346 case SM5502_MUIC_ADC_AUDIO_TYPE1: 347 /* 348 * Check whether cable type is 349 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE 350 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END 351 * by using Button event. 352 */ 353 break; 354 case SM5502_MUIC_ADC_OPEN: 355 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, 356 &dev_type1); 357 if (ret) { 358 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); 359 return ret; 360 } 361 362 switch (dev_type1) { 363 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: 364 cable_type = SM5502_MUIC_ADC_OPEN_USB; 365 break; 366 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: 367 cable_type = SM5502_MUIC_ADC_OPEN_TA; 368 break; 369 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: 370 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; 371 break; 372 default: 373 dev_dbg(info->dev, 374 "cannot identify the cable type: adc(0x%x)\n", 375 adc); 376 return -EINVAL; 377 } 378 break; 379 default: 380 dev_err(info->dev, 381 "failed to identify the cable type: adc(0x%x)\n", adc); 382 return -EINVAL; 383 } 384 385 return cable_type; 386 } 387 388 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 389 bool attached) 390 { 391 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; 392 unsigned int cable_type = SM5502_MUIC_ADC_GROUND; 393 unsigned int con_sw = DM_DP_SWITCH_OPEN; 394 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; 395 unsigned int id; 396 int ret; 397 398 /* Get the type of attached or detached cable */ 399 if (attached) 400 cable_type = sm5502_muic_get_cable_type(info); 401 else 402 cable_type = prev_cable_type; 403 prev_cable_type = cable_type; 404 405 switch (cable_type) { 406 case SM5502_MUIC_ADC_OPEN_USB: 407 id = EXTCON_USB; 408 con_sw = DM_DP_SWITCH_USB; 409 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; 410 break; 411 case SM5502_MUIC_ADC_OPEN_TA: 412 id = EXTCON_CHG_USB_DCP; 413 con_sw = DM_DP_SWITCH_OPEN; 414 vbus_sw = VBUSIN_SWITCH_VBUSOUT; 415 break; 416 case SM5502_MUIC_ADC_GROUND_USB_OTG: 417 case SM5502_MUIC_ADC_OPEN_USB_OTG: 418 id = EXTCON_USB_HOST; 419 con_sw = DM_DP_SWITCH_USB; 420 vbus_sw = VBUSIN_SWITCH_OPEN; 421 break; 422 default: 423 dev_dbg(info->dev, 424 "cannot handle this cable_type (0x%x)\n", cable_type); 425 return 0; 426 } 427 428 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ 429 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); 430 if (ret < 0) 431 return ret; 432 433 /* Change the state of external accessory */ 434 extcon_set_state_sync(info->edev, id, attached); 435 if (id == EXTCON_USB) 436 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 437 attached); 438 439 return 0; 440 } 441 442 static void sm5502_muic_irq_work(struct work_struct *work) 443 { 444 struct sm5502_muic_info *info = container_of(work, 445 struct sm5502_muic_info, irq_work); 446 int ret = 0; 447 448 if (!info->edev) 449 return; 450 451 mutex_lock(&info->mutex); 452 453 /* Detect attached or detached cables */ 454 if (info->irq_attach) { 455 ret = sm5502_muic_cable_handler(info, true); 456 info->irq_attach = false; 457 } 458 if (info->irq_detach) { 459 ret = sm5502_muic_cable_handler(info, false); 460 info->irq_detach = false; 461 } 462 463 if (ret < 0) 464 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 465 466 mutex_unlock(&info->mutex); 467 } 468 469 /* 470 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. 471 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. 472 */ 473 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) 474 { 475 switch (irq_type) { 476 case SM5502_IRQ_INT1_ATTACH: 477 info->irq_attach = true; 478 break; 479 case SM5502_IRQ_INT1_DETACH: 480 info->irq_detach = true; 481 break; 482 case SM5502_IRQ_INT1_KP: 483 case SM5502_IRQ_INT1_LKP: 484 case SM5502_IRQ_INT1_LKR: 485 case SM5502_IRQ_INT1_OVP_EVENT: 486 case SM5502_IRQ_INT1_OCP_EVENT: 487 case SM5502_IRQ_INT1_OVP_OCP_DIS: 488 case SM5502_IRQ_INT2_VBUS_DET: 489 case SM5502_IRQ_INT2_REV_ACCE: 490 case SM5502_IRQ_INT2_ADC_CHG: 491 case SM5502_IRQ_INT2_STUCK_KEY: 492 case SM5502_IRQ_INT2_STUCK_KEY_RCV: 493 case SM5502_IRQ_INT2_MHL: 494 default: 495 break; 496 } 497 498 return 0; 499 } 500 501 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) 502 { 503 struct sm5502_muic_info *info = data; 504 int i, irq_type = -1, ret; 505 506 for (i = 0; i < info->num_muic_irqs; i++) 507 if (irq == info->muic_irqs[i].virq) 508 irq_type = info->muic_irqs[i].irq; 509 510 ret = sm5502_parse_irq(info, irq_type); 511 if (ret < 0) { 512 dev_warn(info->dev, "cannot handle is interrupt:%d\n", 513 irq_type); 514 return IRQ_HANDLED; 515 } 516 schedule_work(&info->irq_work); 517 518 return IRQ_HANDLED; 519 } 520 521 static void sm5502_muic_detect_cable_wq(struct work_struct *work) 522 { 523 struct sm5502_muic_info *info = container_of(to_delayed_work(work), 524 struct sm5502_muic_info, wq_detcable); 525 int ret; 526 527 /* Notify the state of connector cable or not */ 528 ret = sm5502_muic_cable_handler(info, true); 529 if (ret < 0) 530 dev_warn(info->dev, "failed to detect cable state\n"); 531 } 532 533 static void sm5502_init_dev_type(struct sm5502_muic_info *info) 534 { 535 unsigned int reg_data, vendor_id, version_id; 536 int i, ret; 537 538 /* To test I2C, Print version_id and vendor_id of SM5502 */ 539 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); 540 if (ret) { 541 dev_err(info->dev, 542 "failed to read DEVICE_ID register: %d\n", ret); 543 return; 544 } 545 546 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> 547 SM5502_REG_DEVICE_ID_VENDOR_SHIFT); 548 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> 549 SM5502_REG_DEVICE_ID_VERSION_SHIFT); 550 551 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 552 version_id, vendor_id); 553 554 /* Initiazle the register of SM5502 device to bring-up */ 555 for (i = 0; i < info->num_reg_data; i++) { 556 unsigned int val = 0; 557 558 if (!info->reg_data[i].invert) 559 val |= ~info->reg_data[i].val; 560 else 561 val = info->reg_data[i].val; 562 regmap_write(info->regmap, info->reg_data[i].reg, val); 563 } 564 } 565 566 static int sm5022_muic_i2c_probe(struct i2c_client *i2c, 567 const struct i2c_device_id *id) 568 { 569 struct device_node *np = i2c->dev.of_node; 570 struct sm5502_muic_info *info; 571 int i, ret, irq_flags; 572 573 if (!np) 574 return -EINVAL; 575 576 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 577 if (!info) 578 return -ENOMEM; 579 i2c_set_clientdata(i2c, info); 580 581 info->dev = &i2c->dev; 582 info->i2c = i2c; 583 info->irq = i2c->irq; 584 info->muic_irqs = sm5502_muic_irqs; 585 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs); 586 info->reg_data = sm5502_reg_data; 587 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data); 588 589 mutex_init(&info->mutex); 590 591 INIT_WORK(&info->irq_work, sm5502_muic_irq_work); 592 593 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); 594 if (IS_ERR(info->regmap)) { 595 ret = PTR_ERR(info->regmap); 596 dev_err(info->dev, "failed to allocate register map: %d\n", 597 ret); 598 return ret; 599 } 600 601 /* Support irq domain for SM5502 MUIC device */ 602 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 603 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 604 &sm5502_muic_irq_chip, &info->irq_data); 605 if (ret != 0) { 606 dev_err(info->dev, "failed to request IRQ %d: %d\n", 607 info->irq, ret); 608 return ret; 609 } 610 611 for (i = 0; i < info->num_muic_irqs; i++) { 612 struct muic_irq *muic_irq = &info->muic_irqs[i]; 613 int virq = 0; 614 615 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 616 if (virq <= 0) 617 return -EINVAL; 618 muic_irq->virq = virq; 619 620 ret = devm_request_threaded_irq(info->dev, virq, NULL, 621 sm5502_muic_irq_handler, 622 IRQF_NO_SUSPEND | IRQF_ONESHOT, 623 muic_irq->name, info); 624 if (ret) { 625 dev_err(info->dev, 626 "failed: irq request (IRQ: %d, error :%d)\n", 627 muic_irq->irq, ret); 628 return ret; 629 } 630 } 631 632 /* Allocate extcon device */ 633 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); 634 if (IS_ERR(info->edev)) { 635 dev_err(info->dev, "failed to allocate memory for extcon\n"); 636 return -ENOMEM; 637 } 638 639 /* Register extcon device */ 640 ret = devm_extcon_dev_register(info->dev, info->edev); 641 if (ret) { 642 dev_err(info->dev, "failed to register extcon device\n"); 643 return ret; 644 } 645 646 /* 647 * Detect accessory after completing the initialization of platform 648 * 649 * - Use delayed workqueue to detect cable state and then 650 * notify cable state to notifiee/platform through uevent. 651 * After completing the booting of platform, the extcon provider 652 * driver should notify cable state to upper layer. 653 */ 654 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); 655 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 656 msecs_to_jiffies(DELAY_MS_DEFAULT)); 657 658 /* Initialize SM5502 device and print vendor id and version id */ 659 sm5502_init_dev_type(info); 660 661 return 0; 662 } 663 664 static int sm5502_muic_i2c_remove(struct i2c_client *i2c) 665 { 666 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 667 668 regmap_del_irq_chip(info->irq, info->irq_data); 669 670 return 0; 671 } 672 673 static const struct of_device_id sm5502_dt_match[] = { 674 { .compatible = "siliconmitus,sm5502-muic" }, 675 { }, 676 }; 677 MODULE_DEVICE_TABLE(of, sm5502_dt_match); 678 679 #ifdef CONFIG_PM_SLEEP 680 static int sm5502_muic_suspend(struct device *dev) 681 { 682 struct i2c_client *i2c = to_i2c_client(dev); 683 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 684 685 enable_irq_wake(info->irq); 686 687 return 0; 688 } 689 690 static int sm5502_muic_resume(struct device *dev) 691 { 692 struct i2c_client *i2c = to_i2c_client(dev); 693 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 694 695 disable_irq_wake(info->irq); 696 697 return 0; 698 } 699 #endif 700 701 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, 702 sm5502_muic_suspend, sm5502_muic_resume); 703 704 static const struct i2c_device_id sm5502_i2c_id[] = { 705 { "sm5502", TYPE_SM5502 }, 706 { } 707 }; 708 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); 709 710 static struct i2c_driver sm5502_muic_i2c_driver = { 711 .driver = { 712 .name = "sm5502", 713 .pm = &sm5502_muic_pm_ops, 714 .of_match_table = sm5502_dt_match, 715 }, 716 .probe = sm5022_muic_i2c_probe, 717 .remove = sm5502_muic_i2c_remove, 718 .id_table = sm5502_i2c_id, 719 }; 720 721 static int __init sm5502_muic_i2c_init(void) 722 { 723 return i2c_add_driver(&sm5502_muic_i2c_driver); 724 } 725 subsys_initcall(sm5502_muic_i2c_init); 726 727 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); 728 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 729 MODULE_LICENSE("GPL"); 730