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