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