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