1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches 4 * 5 * Copyright (c) 2014 Samsung Electronics Co., Ltd 6 * Author: Chanwoo Choi <cw00.choi@samsung.com> 7 */ 8 9 #include <linux/err.h> 10 #include <linux/i2c.h> 11 #include <linux/interrupt.h> 12 #include <linux/irqdomain.h> 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/regmap.h> 17 #include <linux/slab.h> 18 #include <linux/extcon-provider.h> 19 20 #include "extcon-sm5502.h" 21 22 #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ 23 24 struct muic_irq { 25 unsigned int irq; 26 const char *name; 27 unsigned int virq; 28 }; 29 30 struct reg_data { 31 u8 reg; 32 unsigned int val; 33 bool invert; 34 }; 35 36 struct sm5502_muic_info { 37 struct device *dev; 38 struct extcon_dev *edev; 39 40 struct i2c_client *i2c; 41 struct regmap *regmap; 42 43 const struct sm5502_type *type; 44 struct regmap_irq_chip_data *irq_data; 45 int irq; 46 bool irq_attach; 47 bool irq_detach; 48 struct work_struct irq_work; 49 50 struct mutex mutex; 51 52 /* 53 * Use delayed workqueue to detect cable state and then 54 * notify cable state to notifiee/platform through uevent. 55 * After completing the booting of platform, the extcon provider 56 * driver should notify cable state to upper layer. 57 */ 58 struct delayed_work wq_detcable; 59 }; 60 61 struct sm5502_type { 62 struct muic_irq *muic_irqs; 63 unsigned int num_muic_irqs; 64 const struct regmap_irq_chip *irq_chip; 65 66 struct reg_data *reg_data; 67 unsigned int num_reg_data; 68 69 unsigned int otg_dev_type1; 70 int (*parse_irq)(struct sm5502_muic_info *info, int irq_type); 71 }; 72 73 /* Default value of SM5502 register to bring up MUIC device. */ 74 static struct reg_data sm5502_reg_data[] = { 75 { 76 .reg = SM5502_REG_RESET, 77 .val = SM5502_REG_RESET_MASK, 78 .invert = true, 79 }, { 80 .reg = SM5502_REG_CONTROL, 81 .val = SM5502_REG_CONTROL_MASK_INT_MASK, 82 .invert = false, 83 }, { 84 .reg = SM5502_REG_INTMASK1, 85 .val = SM5502_REG_INTM1_KP_MASK 86 | SM5502_REG_INTM1_LKP_MASK 87 | SM5502_REG_INTM1_LKR_MASK, 88 .invert = true, 89 }, { 90 .reg = SM5502_REG_INTMASK2, 91 .val = SM5502_REG_INTM2_VBUS_DET_MASK 92 | SM5502_REG_INTM2_REV_ACCE_MASK 93 | SM5502_REG_INTM2_ADC_CHG_MASK 94 | SM5502_REG_INTM2_STUCK_KEY_MASK 95 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK 96 | SM5502_REG_INTM2_MHL_MASK, 97 .invert = true, 98 }, 99 }; 100 101 /* Default value of SM5504 register to bring up MUIC device. */ 102 static struct reg_data sm5504_reg_data[] = { 103 { 104 .reg = SM5502_REG_RESET, 105 .val = SM5502_REG_RESET_MASK, 106 .invert = true, 107 }, { 108 .reg = SM5502_REG_INTMASK1, 109 .val = SM5504_REG_INTM1_ATTACH_MASK 110 | SM5504_REG_INTM1_DETACH_MASK, 111 .invert = false, 112 }, { 113 .reg = SM5502_REG_INTMASK2, 114 .val = SM5504_REG_INTM2_RID_CHG_MASK 115 | SM5504_REG_INTM2_UVLO_MASK 116 | SM5504_REG_INTM2_POR_MASK, 117 .invert = true, 118 }, { 119 .reg = SM5502_REG_CONTROL, 120 .val = SM5502_REG_CONTROL_MANUAL_SW_MASK 121 | SM5504_REG_CONTROL_CHGTYP_MASK 122 | SM5504_REG_CONTROL_USBCHDEN_MASK 123 | SM5504_REG_CONTROL_ADC_EN_MASK, 124 .invert = true, 125 }, 126 }; 127 128 /* List of detectable cables */ 129 static const unsigned int sm5502_extcon_cable[] = { 130 EXTCON_USB, 131 EXTCON_USB_HOST, 132 EXTCON_CHG_USB_SDP, 133 EXTCON_CHG_USB_DCP, 134 EXTCON_NONE, 135 }; 136 137 /* Define supported accessory type */ 138 enum sm5502_muic_acc_type { 139 SM5502_MUIC_ADC_GROUND = 0x0, 140 SM5502_MUIC_ADC_SEND_END_BUTTON, 141 SM5502_MUIC_ADC_REMOTE_S1_BUTTON, 142 SM5502_MUIC_ADC_REMOTE_S2_BUTTON, 143 SM5502_MUIC_ADC_REMOTE_S3_BUTTON, 144 SM5502_MUIC_ADC_REMOTE_S4_BUTTON, 145 SM5502_MUIC_ADC_REMOTE_S5_BUTTON, 146 SM5502_MUIC_ADC_REMOTE_S6_BUTTON, 147 SM5502_MUIC_ADC_REMOTE_S7_BUTTON, 148 SM5502_MUIC_ADC_REMOTE_S8_BUTTON, 149 SM5502_MUIC_ADC_REMOTE_S9_BUTTON, 150 SM5502_MUIC_ADC_REMOTE_S10_BUTTON, 151 SM5502_MUIC_ADC_REMOTE_S11_BUTTON, 152 SM5502_MUIC_ADC_REMOTE_S12_BUTTON, 153 SM5502_MUIC_ADC_RESERVED_ACC_1, 154 SM5502_MUIC_ADC_RESERVED_ACC_2, 155 SM5502_MUIC_ADC_RESERVED_ACC_3, 156 SM5502_MUIC_ADC_RESERVED_ACC_4, 157 SM5502_MUIC_ADC_RESERVED_ACC_5, 158 SM5502_MUIC_ADC_AUDIO_TYPE2, 159 SM5502_MUIC_ADC_PHONE_POWERED_DEV, 160 SM5502_MUIC_ADC_TTY_CONVERTER, 161 SM5502_MUIC_ADC_UART_CABLE, 162 SM5502_MUIC_ADC_TYPE1_CHARGER, 163 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 164 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 165 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, 166 SM5502_MUIC_ADC_TYPE2_CHARGER, 167 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 168 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 169 SM5502_MUIC_ADC_AUDIO_TYPE1, 170 SM5502_MUIC_ADC_OPEN = 0x1f, 171 172 /* 173 * The below accessories have same ADC value (0x1f or 0x1e). 174 * So, Device type1 is used to separate specific accessory. 175 */ 176 /* |---------|--ADC| */ 177 /* | [7:5]|[4:0]| */ 178 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ 179 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ 180 /* |Dev Type1|--ADC| */ 181 SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */ 182 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ 183 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ 184 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ 185 }; 186 187 /* List of supported interrupt for SM5502 */ 188 static struct muic_irq sm5502_muic_irqs[] = { 189 { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, 190 { SM5502_IRQ_INT1_DETACH, "muic-detach" }, 191 { SM5502_IRQ_INT1_KP, "muic-kp" }, 192 { SM5502_IRQ_INT1_LKP, "muic-lkp" }, 193 { SM5502_IRQ_INT1_LKR, "muic-lkr" }, 194 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, 195 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, 196 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, 197 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, 198 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, 199 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, 200 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, 201 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, 202 { SM5502_IRQ_INT2_MHL, "muic-mhl" }, 203 }; 204 205 /* Define interrupt list of SM5502 to register regmap_irq */ 206 static const struct regmap_irq sm5502_irqs[] = { 207 /* INT1 interrupts */ 208 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, 209 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, 210 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, 211 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, 212 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, 213 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, 214 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, 215 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, 216 217 /* INT2 interrupts */ 218 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, 219 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, 220 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, 221 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, 222 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, 223 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, 224 }; 225 226 static const struct regmap_irq_chip sm5502_muic_irq_chip = { 227 .name = "sm5502", 228 .status_base = SM5502_REG_INT1, 229 .mask_base = SM5502_REG_INTMASK1, 230 .num_regs = 2, 231 .irqs = sm5502_irqs, 232 .num_irqs = ARRAY_SIZE(sm5502_irqs), 233 }; 234 235 /* List of supported interrupt for SM5504 */ 236 static struct muic_irq sm5504_muic_irqs[] = { 237 { SM5504_IRQ_INT1_ATTACH, "muic-attach" }, 238 { SM5504_IRQ_INT1_DETACH, "muic-detach" }, 239 { SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" }, 240 { SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" }, 241 { SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, 242 { SM5504_IRQ_INT1_CONNECT, "muic-connect" }, 243 { SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" }, 244 { SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" }, 245 { SM5504_IRQ_INT2_UVLO, "muic-uvlo" }, 246 { SM5504_IRQ_INT2_POR, "muic-por" }, 247 { SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" }, 248 { SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" }, 249 { SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" }, 250 { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" }, 251 }; 252 253 /* Define interrupt list of SM5504 to register regmap_irq */ 254 static const struct regmap_irq sm5504_irqs[] = { 255 /* INT1 interrupts */ 256 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, }, 257 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, }, 258 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, }, 259 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, }, 260 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, }, 261 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, }, 262 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, }, 263 264 /* INT2 interrupts */ 265 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,}, 266 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, }, 267 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, }, 268 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, }, 269 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, }, 270 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, }, 271 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, }, 272 }; 273 274 static const struct regmap_irq_chip sm5504_muic_irq_chip = { 275 .name = "sm5504", 276 .status_base = SM5502_REG_INT1, 277 .mask_base = SM5502_REG_INTMASK1, 278 .num_regs = 2, 279 .irqs = sm5504_irqs, 280 .num_irqs = ARRAY_SIZE(sm5504_irqs), 281 }; 282 283 /* Define regmap configuration of SM5502 for I2C communication */ 284 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) 285 { 286 switch (reg) { 287 case SM5502_REG_INTMASK1: 288 case SM5502_REG_INTMASK2: 289 return true; 290 default: 291 break; 292 } 293 return false; 294 } 295 296 static const struct regmap_config sm5502_muic_regmap_config = { 297 .reg_bits = 8, 298 .val_bits = 8, 299 .volatile_reg = sm5502_muic_volatile_reg, 300 .max_register = SM5502_REG_END, 301 }; 302 303 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 304 static int sm5502_muic_set_path(struct sm5502_muic_info *info, 305 unsigned int con_sw, unsigned int vbus_sw, 306 bool attached) 307 { 308 int ret; 309 310 if (!attached) { 311 con_sw = DM_DP_SWITCH_OPEN; 312 vbus_sw = VBUSIN_SWITCH_OPEN; 313 } 314 315 switch (con_sw) { 316 case DM_DP_SWITCH_OPEN: 317 case DM_DP_SWITCH_USB: 318 case DM_DP_SWITCH_AUDIO: 319 case DM_DP_SWITCH_UART: 320 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 321 SM5502_REG_MANUAL_SW1_DP_MASK | 322 SM5502_REG_MANUAL_SW1_DM_MASK, 323 con_sw); 324 if (ret < 0) { 325 dev_err(info->dev, 326 "cannot update DM_CON/DP_CON switch\n"); 327 return ret; 328 } 329 break; 330 default: 331 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 332 con_sw); 333 return -EINVAL; 334 } 335 336 switch (vbus_sw) { 337 case VBUSIN_SWITCH_OPEN: 338 case VBUSIN_SWITCH_VBUSOUT: 339 case VBUSIN_SWITCH_MIC: 340 case VBUSIN_SWITCH_VBUSOUT_WITH_USB: 341 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, 342 SM5502_REG_MANUAL_SW1_VBUSIN_MASK, 343 vbus_sw); 344 if (ret < 0) { 345 dev_err(info->dev, 346 "cannot update VBUSIN switch\n"); 347 return ret; 348 } 349 break; 350 default: 351 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); 352 return -EINVAL; 353 } 354 355 return 0; 356 } 357 358 /* Return cable type of attached or detached accessories */ 359 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) 360 { 361 unsigned int cable_type, adc, dev_type1; 362 int ret; 363 364 /* Read ADC value according to external cable or button */ 365 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); 366 if (ret) { 367 dev_err(info->dev, "failed to read ADC register\n"); 368 return ret; 369 } 370 371 /* 372 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't 373 * connected with to MUIC device. 374 */ 375 cable_type = adc & SM5502_REG_ADC_MASK; 376 377 switch (cable_type) { 378 case SM5502_MUIC_ADC_GROUND: 379 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, 380 &dev_type1); 381 if (ret) { 382 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); 383 return ret; 384 } 385 386 if (dev_type1 == info->type->otg_dev_type1) { 387 cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG; 388 } else { 389 dev_dbg(info->dev, 390 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n", 391 adc, dev_type1); 392 return -EINVAL; 393 } 394 break; 395 case SM5502_MUIC_ADC_SEND_END_BUTTON: 396 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: 397 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: 398 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: 399 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: 400 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: 401 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: 402 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: 403 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: 404 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: 405 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: 406 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: 407 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: 408 case SM5502_MUIC_ADC_RESERVED_ACC_1: 409 case SM5502_MUIC_ADC_RESERVED_ACC_2: 410 case SM5502_MUIC_ADC_RESERVED_ACC_3: 411 case SM5502_MUIC_ADC_RESERVED_ACC_4: 412 case SM5502_MUIC_ADC_RESERVED_ACC_5: 413 case SM5502_MUIC_ADC_AUDIO_TYPE2: 414 case SM5502_MUIC_ADC_PHONE_POWERED_DEV: 415 case SM5502_MUIC_ADC_TTY_CONVERTER: 416 case SM5502_MUIC_ADC_UART_CABLE: 417 case SM5502_MUIC_ADC_TYPE1_CHARGER: 418 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 419 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 420 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: 421 case SM5502_MUIC_ADC_TYPE2_CHARGER: 422 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 423 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 424 break; 425 case SM5502_MUIC_ADC_AUDIO_TYPE1: 426 /* 427 * Check whether cable type is 428 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE 429 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END 430 * by using Button event. 431 */ 432 break; 433 case SM5502_MUIC_ADC_OPEN: 434 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, 435 &dev_type1); 436 if (ret) { 437 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); 438 return ret; 439 } 440 441 if (dev_type1 == info->type->otg_dev_type1) { 442 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; 443 break; 444 } 445 446 switch (dev_type1) { 447 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: 448 cable_type = SM5502_MUIC_ADC_OPEN_USB; 449 break; 450 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: 451 cable_type = SM5502_MUIC_ADC_OPEN_TA; 452 break; 453 default: 454 dev_dbg(info->dev, 455 "cannot identify the cable type: adc(0x%x)\n", 456 adc); 457 return -EINVAL; 458 } 459 break; 460 default: 461 dev_err(info->dev, 462 "failed to identify the cable type: adc(0x%x)\n", adc); 463 return -EINVAL; 464 } 465 466 return cable_type; 467 } 468 469 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, 470 bool attached) 471 { 472 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; 473 unsigned int cable_type = SM5502_MUIC_ADC_GROUND; 474 unsigned int con_sw = DM_DP_SWITCH_OPEN; 475 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; 476 unsigned int id; 477 int ret; 478 479 /* Get the type of attached or detached cable */ 480 if (attached) 481 cable_type = sm5502_muic_get_cable_type(info); 482 else 483 cable_type = prev_cable_type; 484 prev_cable_type = cable_type; 485 486 switch (cable_type) { 487 case SM5502_MUIC_ADC_OPEN_USB: 488 id = EXTCON_USB; 489 con_sw = DM_DP_SWITCH_USB; 490 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; 491 break; 492 case SM5502_MUIC_ADC_OPEN_TA: 493 id = EXTCON_CHG_USB_DCP; 494 con_sw = DM_DP_SWITCH_OPEN; 495 vbus_sw = VBUSIN_SWITCH_VBUSOUT; 496 break; 497 case SM5502_MUIC_ADC_GROUND_USB_OTG: 498 case SM5502_MUIC_ADC_OPEN_USB_OTG: 499 id = EXTCON_USB_HOST; 500 con_sw = DM_DP_SWITCH_USB; 501 vbus_sw = VBUSIN_SWITCH_OPEN; 502 break; 503 default: 504 dev_dbg(info->dev, 505 "cannot handle this cable_type (0x%x)\n", cable_type); 506 return 0; 507 } 508 509 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ 510 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); 511 if (ret < 0) 512 return ret; 513 514 /* Change the state of external accessory */ 515 extcon_set_state_sync(info->edev, id, attached); 516 if (id == EXTCON_USB) 517 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 518 attached); 519 520 return 0; 521 } 522 523 static void sm5502_muic_irq_work(struct work_struct *work) 524 { 525 struct sm5502_muic_info *info = container_of(work, 526 struct sm5502_muic_info, irq_work); 527 int ret = 0; 528 529 if (!info->edev) 530 return; 531 532 mutex_lock(&info->mutex); 533 534 /* Detect attached or detached cables */ 535 if (info->irq_attach) { 536 ret = sm5502_muic_cable_handler(info, true); 537 info->irq_attach = false; 538 } 539 if (info->irq_detach) { 540 ret = sm5502_muic_cable_handler(info, false); 541 info->irq_detach = false; 542 } 543 544 if (ret < 0) 545 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 546 547 mutex_unlock(&info->mutex); 548 } 549 550 /* 551 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. 552 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. 553 */ 554 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) 555 { 556 switch (irq_type) { 557 case SM5502_IRQ_INT1_ATTACH: 558 info->irq_attach = true; 559 break; 560 case SM5502_IRQ_INT1_DETACH: 561 info->irq_detach = true; 562 break; 563 case SM5502_IRQ_INT1_KP: 564 case SM5502_IRQ_INT1_LKP: 565 case SM5502_IRQ_INT1_LKR: 566 case SM5502_IRQ_INT1_OVP_EVENT: 567 case SM5502_IRQ_INT1_OCP_EVENT: 568 case SM5502_IRQ_INT1_OVP_OCP_DIS: 569 case SM5502_IRQ_INT2_VBUS_DET: 570 case SM5502_IRQ_INT2_REV_ACCE: 571 case SM5502_IRQ_INT2_ADC_CHG: 572 case SM5502_IRQ_INT2_STUCK_KEY: 573 case SM5502_IRQ_INT2_STUCK_KEY_RCV: 574 case SM5502_IRQ_INT2_MHL: 575 default: 576 break; 577 } 578 579 return 0; 580 } 581 582 static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type) 583 { 584 switch (irq_type) { 585 case SM5504_IRQ_INT1_ATTACH: 586 info->irq_attach = true; 587 break; 588 case SM5504_IRQ_INT1_DETACH: 589 info->irq_detach = true; 590 break; 591 case SM5504_IRQ_INT1_CHG_DET: 592 case SM5504_IRQ_INT1_DCD_OUT: 593 case SM5504_IRQ_INT1_OVP_EVENT: 594 case SM5504_IRQ_INT1_CONNECT: 595 case SM5504_IRQ_INT1_ADC_CHG: 596 case SM5504_IRQ_INT2_RID_CHG: 597 case SM5504_IRQ_INT2_UVLO: 598 case SM5504_IRQ_INT2_POR: 599 case SM5504_IRQ_INT2_OVP_FET: 600 case SM5504_IRQ_INT2_OCP_LATCH: 601 case SM5504_IRQ_INT2_OCP_EVENT: 602 case SM5504_IRQ_INT2_OVP_OCP_EVENT: 603 default: 604 break; 605 } 606 607 return 0; 608 } 609 610 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) 611 { 612 struct sm5502_muic_info *info = data; 613 int i, irq_type = -1, ret; 614 615 for (i = 0; i < info->type->num_muic_irqs; i++) 616 if (irq == info->type->muic_irqs[i].virq) 617 irq_type = info->type->muic_irqs[i].irq; 618 619 ret = info->type->parse_irq(info, irq_type); 620 if (ret < 0) { 621 dev_warn(info->dev, "cannot handle is interrupt:%d\n", 622 irq_type); 623 return IRQ_HANDLED; 624 } 625 schedule_work(&info->irq_work); 626 627 return IRQ_HANDLED; 628 } 629 630 static void sm5502_muic_detect_cable_wq(struct work_struct *work) 631 { 632 struct sm5502_muic_info *info = container_of(to_delayed_work(work), 633 struct sm5502_muic_info, wq_detcable); 634 int ret; 635 636 /* Notify the state of connector cable or not */ 637 ret = sm5502_muic_cable_handler(info, true); 638 if (ret < 0) 639 dev_warn(info->dev, "failed to detect cable state\n"); 640 } 641 642 static void sm5502_init_dev_type(struct sm5502_muic_info *info) 643 { 644 unsigned int reg_data, vendor_id, version_id; 645 int i, ret; 646 647 /* To test I2C, Print version_id and vendor_id of SM5502 */ 648 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); 649 if (ret) { 650 dev_err(info->dev, 651 "failed to read DEVICE_ID register: %d\n", ret); 652 return; 653 } 654 655 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> 656 SM5502_REG_DEVICE_ID_VENDOR_SHIFT); 657 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> 658 SM5502_REG_DEVICE_ID_VERSION_SHIFT); 659 660 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 661 version_id, vendor_id); 662 663 /* Initiazle the register of SM5502 device to bring-up */ 664 for (i = 0; i < info->type->num_reg_data; i++) { 665 unsigned int val = 0; 666 667 if (!info->type->reg_data[i].invert) 668 val |= ~info->type->reg_data[i].val; 669 else 670 val = info->type->reg_data[i].val; 671 regmap_write(info->regmap, info->type->reg_data[i].reg, val); 672 } 673 } 674 675 static int sm5022_muic_i2c_probe(struct i2c_client *i2c) 676 { 677 struct device_node *np = i2c->dev.of_node; 678 struct sm5502_muic_info *info; 679 int i, ret, irq_flags; 680 681 if (!np) 682 return -EINVAL; 683 684 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 685 if (!info) 686 return -ENOMEM; 687 i2c_set_clientdata(i2c, info); 688 689 info->dev = &i2c->dev; 690 info->i2c = i2c; 691 info->irq = i2c->irq; 692 info->type = device_get_match_data(info->dev); 693 if (!info->type) 694 return -EINVAL; 695 if (!info->type->parse_irq) { 696 dev_err(info->dev, "parse_irq missing in struct sm5502_type\n"); 697 return -EINVAL; 698 } 699 700 mutex_init(&info->mutex); 701 702 INIT_WORK(&info->irq_work, sm5502_muic_irq_work); 703 704 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); 705 if (IS_ERR(info->regmap)) { 706 ret = PTR_ERR(info->regmap); 707 dev_err(info->dev, "failed to allocate register map: %d\n", 708 ret); 709 return ret; 710 } 711 712 /* Support irq domain for SM5502 MUIC device */ 713 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 714 ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq, 715 irq_flags, 0, info->type->irq_chip, 716 &info->irq_data); 717 if (ret != 0) { 718 dev_err(info->dev, "failed to request IRQ %d: %d\n", 719 info->irq, ret); 720 return ret; 721 } 722 723 for (i = 0; i < info->type->num_muic_irqs; i++) { 724 struct muic_irq *muic_irq = &info->type->muic_irqs[i]; 725 int virq = 0; 726 727 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 728 if (virq <= 0) 729 return -EINVAL; 730 muic_irq->virq = virq; 731 732 ret = devm_request_threaded_irq(info->dev, virq, NULL, 733 sm5502_muic_irq_handler, 734 IRQF_NO_SUSPEND | IRQF_ONESHOT, 735 muic_irq->name, info); 736 if (ret) { 737 dev_err(info->dev, 738 "failed: irq request (IRQ: %d, error :%d)\n", 739 muic_irq->irq, ret); 740 return ret; 741 } 742 } 743 744 /* Allocate extcon device */ 745 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); 746 if (IS_ERR(info->edev)) { 747 dev_err(info->dev, "failed to allocate memory for extcon\n"); 748 return -ENOMEM; 749 } 750 751 /* Register extcon device */ 752 ret = devm_extcon_dev_register(info->dev, info->edev); 753 if (ret) { 754 dev_err(info->dev, "failed to register extcon device\n"); 755 return ret; 756 } 757 758 /* 759 * Detect accessory after completing the initialization of platform 760 * 761 * - Use delayed workqueue to detect cable state and then 762 * notify cable state to notifiee/platform through uevent. 763 * After completing the booting of platform, the extcon provider 764 * driver should notify cable state to upper layer. 765 */ 766 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); 767 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 768 msecs_to_jiffies(DELAY_MS_DEFAULT)); 769 770 /* Initialize SM5502 device and print vendor id and version id */ 771 sm5502_init_dev_type(info); 772 773 return 0; 774 } 775 776 static const struct sm5502_type sm5502_data = { 777 .muic_irqs = sm5502_muic_irqs, 778 .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs), 779 .irq_chip = &sm5502_muic_irq_chip, 780 .reg_data = sm5502_reg_data, 781 .num_reg_data = ARRAY_SIZE(sm5502_reg_data), 782 .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK, 783 .parse_irq = sm5502_parse_irq, 784 }; 785 786 static const struct sm5502_type sm5504_data = { 787 .muic_irqs = sm5504_muic_irqs, 788 .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs), 789 .irq_chip = &sm5504_muic_irq_chip, 790 .reg_data = sm5504_reg_data, 791 .num_reg_data = ARRAY_SIZE(sm5504_reg_data), 792 .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK, 793 .parse_irq = sm5504_parse_irq, 794 }; 795 796 static const struct of_device_id sm5502_dt_match[] = { 797 { .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data }, 798 { .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data }, 799 { .compatible = "siliconmitus,sm5703-muic", .data = &sm5502_data }, 800 { }, 801 }; 802 MODULE_DEVICE_TABLE(of, sm5502_dt_match); 803 804 #ifdef CONFIG_PM_SLEEP 805 static int sm5502_muic_suspend(struct device *dev) 806 { 807 struct i2c_client *i2c = to_i2c_client(dev); 808 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 809 810 enable_irq_wake(info->irq); 811 812 return 0; 813 } 814 815 static int sm5502_muic_resume(struct device *dev) 816 { 817 struct i2c_client *i2c = to_i2c_client(dev); 818 struct sm5502_muic_info *info = i2c_get_clientdata(i2c); 819 820 disable_irq_wake(info->irq); 821 822 return 0; 823 } 824 #endif 825 826 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, 827 sm5502_muic_suspend, sm5502_muic_resume); 828 829 static const struct i2c_device_id sm5502_i2c_id[] = { 830 { "sm5502", (kernel_ulong_t)&sm5502_data }, 831 { "sm5504", (kernel_ulong_t)&sm5504_data }, 832 { "sm5703-muic", (kernel_ulong_t)&sm5502_data }, 833 { } 834 }; 835 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); 836 837 static struct i2c_driver sm5502_muic_i2c_driver = { 838 .driver = { 839 .name = "sm5502", 840 .pm = &sm5502_muic_pm_ops, 841 .of_match_table = sm5502_dt_match, 842 }, 843 .probe = sm5022_muic_i2c_probe, 844 .id_table = sm5502_i2c_id, 845 }; 846 847 static int __init sm5502_muic_i2c_init(void) 848 { 849 return i2c_add_driver(&sm5502_muic_i2c_driver); 850 } 851 subsys_initcall(sm5502_muic_i2c_init); 852 853 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); 854 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 855 MODULE_LICENSE("GPL"); 856