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