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