1 /* 2 * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC 3 * 4 * Copyright (C) 2012 Samsung Electrnoics 5 * Chanwoo Choi <cw00.choi@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your 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/kernel.h> 19 #include <linux/module.h> 20 #include <linux/i2c.h> 21 #include <linux/slab.h> 22 #include <linux/interrupt.h> 23 #include <linux/err.h> 24 #include <linux/platform_device.h> 25 #include <linux/mfd/max77693.h> 26 #include <linux/mfd/max77693-private.h> 27 #include <linux/extcon.h> 28 #include <linux/regmap.h> 29 #include <linux/irqdomain.h> 30 31 #define DEV_NAME "max77693-muic" 32 33 /* MAX77693 MUIC - STATUS1~3 Register */ 34 #define STATUS1_ADC_SHIFT (0) 35 #define STATUS1_ADCLOW_SHIFT (5) 36 #define STATUS1_ADCERR_SHIFT (6) 37 #define STATUS1_ADC1K_SHIFT (7) 38 #define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT) 39 #define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT) 40 #define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT) 41 #define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT) 42 43 #define STATUS2_CHGTYP_SHIFT (0) 44 #define STATUS2_CHGDETRUN_SHIFT (3) 45 #define STATUS2_DCDTMR_SHIFT (4) 46 #define STATUS2_DXOVP_SHIFT (5) 47 #define STATUS2_VBVOLT_SHIFT (6) 48 #define STATUS2_VIDRM_SHIFT (7) 49 #define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT) 50 #define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT) 51 #define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT) 52 #define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT) 53 #define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT) 54 #define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT) 55 56 #define STATUS3_OVP_SHIFT (2) 57 #define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT) 58 59 /* MAX77693 CDETCTRL1~2 register */ 60 #define CDETCTRL1_CHGDETEN_SHIFT (0) 61 #define CDETCTRL1_CHGTYPMAN_SHIFT (1) 62 #define CDETCTRL1_DCDEN_SHIFT (2) 63 #define CDETCTRL1_DCD2SCT_SHIFT (3) 64 #define CDETCTRL1_CDDELAY_SHIFT (4) 65 #define CDETCTRL1_DCDCPL_SHIFT (5) 66 #define CDETCTRL1_CDPDET_SHIFT (7) 67 #define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT) 68 #define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT) 69 #define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT) 70 #define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT) 71 #define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT) 72 #define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT) 73 #define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT) 74 75 #define CDETCTRL2_VIDRMEN_SHIFT (1) 76 #define CDETCTRL2_DXOVPEN_SHIFT (3) 77 #define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT) 78 #define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT) 79 80 /* MAX77693 MUIC - CONTROL1~3 register */ 81 #define COMN1SW_SHIFT (0) 82 #define COMP2SW_SHIFT (3) 83 #define COMN1SW_MASK (0x7 << COMN1SW_SHIFT) 84 #define COMP2SW_MASK (0x7 << COMP2SW_SHIFT) 85 #define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK) 86 #define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \ 87 | (1 << COMN1SW_SHIFT)) 88 #define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \ 89 | (2 << COMN1SW_SHIFT)) 90 #define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \ 91 | (3 << COMN1SW_SHIFT)) 92 #define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \ 93 | (0 << COMN1SW_SHIFT)) 94 95 #define CONTROL2_LOWPWR_SHIFT (0) 96 #define CONTROL2_ADCEN_SHIFT (1) 97 #define CONTROL2_CPEN_SHIFT (2) 98 #define CONTROL2_SFOUTASRT_SHIFT (3) 99 #define CONTROL2_SFOUTORD_SHIFT (4) 100 #define CONTROL2_ACCDET_SHIFT (5) 101 #define CONTROL2_USBCPINT_SHIFT (6) 102 #define CONTROL2_RCPS_SHIFT (7) 103 #define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT) 104 #define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT) 105 #define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT) 106 #define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT) 107 #define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT) 108 #define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT) 109 #define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT) 110 #define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT) 111 112 #define CONTROL3_JIGSET_SHIFT (0) 113 #define CONTROL3_BTLDSET_SHIFT (2) 114 #define CONTROL3_ADCDBSET_SHIFT (4) 115 #define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT) 116 #define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT) 117 #define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT) 118 119 enum max77693_muic_adc_debounce_time { 120 ADC_DEBOUNCE_TIME_5MS = 0, 121 ADC_DEBOUNCE_TIME_10MS, 122 ADC_DEBOUNCE_TIME_25MS, 123 ADC_DEBOUNCE_TIME_38_62MS, 124 }; 125 126 struct max77693_muic_info { 127 struct device *dev; 128 struct max77693_dev *max77693; 129 struct extcon_dev *edev; 130 int prev_adc; 131 int prev_adc_gnd; 132 int prev_chg_type; 133 u8 status[2]; 134 135 int irq; 136 struct work_struct irq_work; 137 struct mutex mutex; 138 }; 139 140 enum max77693_muic_charger_type { 141 MAX77693_CHARGER_TYPE_NONE = 0, 142 MAX77693_CHARGER_TYPE_USB, 143 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, 144 MAX77693_CHARGER_TYPE_DEDICATED_CHG, 145 MAX77693_CHARGER_TYPE_APPLE_500MA, 146 MAX77693_CHARGER_TYPE_APPLE_1A_2A, 147 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, 148 }; 149 150 /** 151 * struct max77693_muic_irq 152 * @irq: the index of irq list of MUIC device. 153 * @name: the name of irq. 154 * @virq: the virtual irq to use irq domain 155 */ 156 struct max77693_muic_irq { 157 unsigned int irq; 158 const char *name; 159 unsigned int virq; 160 }; 161 162 static struct max77693_muic_irq muic_irqs[] = { 163 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, 164 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, 165 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, 166 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, 167 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, 168 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, 169 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, 170 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, 171 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, 172 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, 173 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, 174 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, 175 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, 176 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, 177 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, 178 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, 179 }; 180 181 /* Define supported accessory type */ 182 enum max77693_muic_acc_type { 183 MAX77693_MUIC_ADC_GROUND = 0x0, 184 MAX77693_MUIC_ADC_SEND_END_BUTTON, 185 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, 186 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, 187 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, 188 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, 189 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, 190 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, 191 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, 192 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, 193 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, 194 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, 195 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, 196 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, 197 MAX77693_MUIC_ADC_RESERVED_ACC_1, 198 MAX77693_MUIC_ADC_RESERVED_ACC_2, 199 MAX77693_MUIC_ADC_RESERVED_ACC_3, 200 MAX77693_MUIC_ADC_RESERVED_ACC_4, 201 MAX77693_MUIC_ADC_RESERVED_ACC_5, 202 MAX77693_MUIC_ADC_CEA936_AUDIO, 203 MAX77693_MUIC_ADC_PHONE_POWERED_DEV, 204 MAX77693_MUIC_ADC_TTY_CONVERTER, 205 MAX77693_MUIC_ADC_UART_CABLE, 206 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, 207 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, 208 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, 209 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, 210 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, 211 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, 212 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, 213 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, 214 MAX77693_MUIC_ADC_OPEN, 215 216 /* The below accessories have same ADC value so ADCLow and 217 ADC1K bit is used to separate specific accessory */ 218 MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */ 219 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */ 220 MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */ 221 }; 222 223 /* MAX77693 MUIC device support below list of accessories(external connector) */ 224 const char *max77693_extcon_cable[] = { 225 [0] = "USB", 226 [1] = "USB-Host", 227 [2] = "TA", 228 [3] = "Fast-charger", 229 [4] = "Slow-charger", 230 [5] = "Charge-downstream", 231 [6] = "MHL", 232 [7] = "Audio-video-load", 233 [8] = "Audio-video-noload", 234 [9] = "JIG", 235 236 NULL, 237 }; 238 239 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, 240 enum max77693_muic_adc_debounce_time time) 241 { 242 int ret = 0; 243 u8 ctrl3; 244 245 switch (time) { 246 case ADC_DEBOUNCE_TIME_5MS: 247 case ADC_DEBOUNCE_TIME_10MS: 248 case ADC_DEBOUNCE_TIME_25MS: 249 case ADC_DEBOUNCE_TIME_38_62MS: 250 ret = max77693_read_reg(info->max77693->regmap_muic, 251 MAX77693_MUIC_REG_CTRL3, &ctrl3); 252 ctrl3 &= ~CONTROL3_ADCDBSET_MASK; 253 ctrl3 |= (time << CONTROL3_ADCDBSET_SHIFT); 254 255 ret = max77693_write_reg(info->max77693->regmap_muic, 256 MAX77693_MUIC_REG_CTRL3, ctrl3); 257 if (ret) { 258 dev_err(info->dev, "failed to set ADC debounce time\n"); 259 ret = -EINVAL; 260 } 261 break; 262 default: 263 dev_err(info->dev, "invalid ADC debounce time\n"); 264 ret = -EINVAL; 265 break; 266 } 267 268 return ret; 269 }; 270 271 static int max77693_muic_set_path(struct max77693_muic_info *info, 272 u8 val, bool attached) 273 { 274 int ret = 0; 275 u8 ctrl1, ctrl2 = 0; 276 277 if (attached) 278 ctrl1 = val; 279 else 280 ctrl1 = CONTROL1_SW_OPEN; 281 282 ret = max77693_update_reg(info->max77693->regmap_muic, 283 MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); 284 if (ret < 0) { 285 dev_err(info->dev, "failed to update MUIC register\n"); 286 goto out; 287 } 288 289 if (attached) 290 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ 291 else 292 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ 293 294 ret = max77693_update_reg(info->max77693->regmap_muic, 295 MAX77693_MUIC_REG_CTRL2, ctrl2, 296 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); 297 if (ret < 0) { 298 dev_err(info->dev, "failed to update MUIC register\n"); 299 goto out; 300 } 301 302 dev_info(info->dev, 303 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 304 ctrl1, ctrl2, attached ? "attached" : "detached"); 305 out: 306 return ret; 307 } 308 309 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info, 310 bool attached) 311 { 312 int ret = 0; 313 int type; 314 int adc, adc1k, adclow; 315 316 if (attached) { 317 adc = info->status[0] & STATUS1_ADC_MASK; 318 adclow = info->status[0] & STATUS1_ADCLOW_MASK; 319 adclow >>= STATUS1_ADCLOW_SHIFT; 320 adc1k = info->status[0] & STATUS1_ADC1K_MASK; 321 adc1k >>= STATUS1_ADC1K_SHIFT; 322 323 /** 324 * [0x1][ADCLow][ADC1K] 325 * [0x1 0 0 ] : USB_OTG 326 * [0x1 1 0 ] : Audio Video Cable with load 327 * [0x1 1 1 ] : MHL 328 */ 329 type = ((0x1 << 8) | (adclow << 1) | adc1k); 330 331 /* Store previous ADC value to handle accessory 332 when accessory will be detached */ 333 info->prev_adc = adc; 334 info->prev_adc_gnd = type; 335 } else 336 type = info->prev_adc_gnd; 337 338 switch (type) { 339 case MAX77693_MUIC_GND_USB_OTG: 340 /* USB_OTG */ 341 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 342 if (ret < 0) 343 goto out; 344 extcon_set_cable_state(info->edev, "USB-Host", attached); 345 break; 346 case MAX77693_MUIC_GND_AV_CABLE_LOAD: 347 /* Audio Video Cable with load */ 348 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 349 if (ret < 0) 350 goto out; 351 extcon_set_cable_state(info->edev, 352 "Audio-video-load", attached); 353 break; 354 case MAX77693_MUIC_GND_MHL_CABLE: 355 /* MHL */ 356 extcon_set_cable_state(info->edev, "MHL", attached); 357 break; 358 default: 359 dev_err(info->dev, "faild to detect %s accessory\n", 360 attached ? "attached" : "detached"); 361 dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n", 362 adc, adclow, adc1k); 363 ret = -EINVAL; 364 break; 365 } 366 367 out: 368 return ret; 369 } 370 371 static int max77693_muic_adc_handler(struct max77693_muic_info *info, 372 int curr_adc, bool attached) 373 { 374 int ret = 0; 375 int adc; 376 377 if (attached) { 378 /* Store ADC value to handle accessory 379 when accessory will be detached */ 380 info->prev_adc = curr_adc; 381 adc = curr_adc; 382 } else 383 adc = info->prev_adc; 384 385 dev_info(info->dev, 386 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 387 attached ? "attached" : "detached", curr_adc, info->prev_adc); 388 389 switch (adc) { 390 case MAX77693_MUIC_ADC_GROUND: 391 /* USB_OTG/MHL/Audio */ 392 max77693_muic_adc_ground_handler(info, attached); 393 break; 394 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: 395 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: 396 /* USB */ 397 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 398 if (ret < 0) 399 goto out; 400 extcon_set_cable_state(info->edev, "USB", attached); 401 break; 402 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: 403 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: 404 /* JIG */ 405 ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached); 406 if (ret < 0) 407 goto out; 408 extcon_set_cable_state(info->edev, "JIG", attached); 409 break; 410 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: 411 /* Audio Video cable with no-load */ 412 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 413 if (ret < 0) 414 goto out; 415 extcon_set_cable_state(info->edev, 416 "Audio-video-noload", attached); 417 break; 418 case MAX77693_MUIC_ADC_SEND_END_BUTTON: 419 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: 420 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: 421 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: 422 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: 423 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: 424 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: 425 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: 426 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: 427 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: 428 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: 429 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: 430 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: 431 case MAX77693_MUIC_ADC_RESERVED_ACC_1: 432 case MAX77693_MUIC_ADC_RESERVED_ACC_2: 433 case MAX77693_MUIC_ADC_RESERVED_ACC_3: 434 case MAX77693_MUIC_ADC_RESERVED_ACC_4: 435 case MAX77693_MUIC_ADC_RESERVED_ACC_5: 436 case MAX77693_MUIC_ADC_CEA936_AUDIO: 437 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: 438 case MAX77693_MUIC_ADC_TTY_CONVERTER: 439 case MAX77693_MUIC_ADC_UART_CABLE: 440 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: 441 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: 442 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: 443 /* This accessory isn't used in general case if it is specially 444 needed to detect additional accessory, should implement 445 proper operation when this accessory is attached/detached. */ 446 dev_info(info->dev, 447 "accessory is %s but it isn't used (adc:0x%x)\n", 448 attached ? "attached" : "detached", adc); 449 goto out; 450 default: 451 dev_err(info->dev, 452 "failed to detect %s accessory (adc:0x%x)\n", 453 attached ? "attached" : "detached", adc); 454 ret = -EINVAL; 455 goto out; 456 } 457 458 out: 459 return ret; 460 } 461 462 static int max77693_muic_chg_handler(struct max77693_muic_info *info, 463 int curr_chg_type, bool attached) 464 { 465 int ret = 0; 466 int chg_type; 467 468 if (attached) { 469 /* Store previous charger type to control 470 when charger accessory will be detached */ 471 info->prev_chg_type = curr_chg_type; 472 chg_type = curr_chg_type; 473 } else 474 chg_type = info->prev_chg_type; 475 476 dev_info(info->dev, 477 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 478 attached ? "attached" : "detached", 479 curr_chg_type, info->prev_chg_type); 480 481 switch (chg_type) { 482 case MAX77693_CHARGER_TYPE_USB: 483 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 484 if (ret < 0) 485 goto out; 486 extcon_set_cable_state(info->edev, "USB", attached); 487 break; 488 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: 489 extcon_set_cable_state(info->edev, 490 "Charge-downstream", attached); 491 break; 492 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 493 extcon_set_cable_state(info->edev, "TA", attached); 494 break; 495 case MAX77693_CHARGER_TYPE_APPLE_500MA: 496 extcon_set_cable_state(info->edev, "Slow-charger", attached); 497 break; 498 case MAX77693_CHARGER_TYPE_APPLE_1A_2A: 499 extcon_set_cable_state(info->edev, "Fast-charger", attached); 500 break; 501 case MAX77693_CHARGER_TYPE_DEAD_BATTERY: 502 break; 503 default: 504 dev_err(info->dev, 505 "failed to detect %s accessory (chg_type:0x%x)\n", 506 attached ? "attached" : "detached", chg_type); 507 ret = -EINVAL; 508 goto out; 509 } 510 511 out: 512 return ret; 513 } 514 515 static void max77693_muic_irq_work(struct work_struct *work) 516 { 517 struct max77693_muic_info *info = container_of(work, 518 struct max77693_muic_info, irq_work); 519 int curr_adc, curr_chg_type; 520 int irq_type = -1; 521 int i, ret = 0; 522 bool attached = true; 523 524 if (!info->edev) 525 return; 526 527 mutex_lock(&info->mutex); 528 529 for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++) 530 if (info->irq == muic_irqs[i].virq) 531 irq_type = muic_irqs[i].irq; 532 533 ret = max77693_bulk_read(info->max77693->regmap_muic, 534 MAX77693_MUIC_REG_STATUS1, 2, info->status); 535 if (ret) { 536 dev_err(info->dev, "failed to read MUIC register\n"); 537 mutex_unlock(&info->mutex); 538 return; 539 } 540 541 switch (irq_type) { 542 case MAX77693_MUIC_IRQ_INT1_ADC: 543 case MAX77693_MUIC_IRQ_INT1_ADC_LOW: 544 case MAX77693_MUIC_IRQ_INT1_ADC_ERR: 545 case MAX77693_MUIC_IRQ_INT1_ADC1K: 546 /* Handle all of accessory except for 547 type of charger accessory */ 548 curr_adc = info->status[0] & STATUS1_ADC_MASK; 549 curr_adc >>= STATUS1_ADC_SHIFT; 550 551 /* Check accossory state which is either detached or attached */ 552 if (curr_adc == MAX77693_MUIC_ADC_OPEN) 553 attached = false; 554 555 ret = max77693_muic_adc_handler(info, curr_adc, attached); 556 break; 557 case MAX77693_MUIC_IRQ_INT2_CHGTYP: 558 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: 559 case MAX77693_MUIC_IRQ_INT2_DCDTMR: 560 case MAX77693_MUIC_IRQ_INT2_DXOVP: 561 case MAX77693_MUIC_IRQ_INT2_VBVOLT: 562 case MAX77693_MUIC_IRQ_INT2_VIDRM: 563 /* Handle charger accessory */ 564 curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 565 curr_chg_type >>= STATUS2_CHGTYP_SHIFT; 566 567 /* Check charger accossory state which 568 is either detached or attached */ 569 if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE) 570 attached = false; 571 572 ret = max77693_muic_chg_handler(info, curr_chg_type, attached); 573 break; 574 case MAX77693_MUIC_IRQ_INT3_EOC: 575 case MAX77693_MUIC_IRQ_INT3_CGMBC: 576 case MAX77693_MUIC_IRQ_INT3_OVP: 577 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: 578 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: 579 case MAX77693_MUIC_IRQ_INT3_BAT_DET: 580 break; 581 default: 582 dev_err(info->dev, "muic interrupt: irq %d occurred\n", 583 irq_type); 584 break; 585 } 586 587 if (ret < 0) 588 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 589 590 mutex_unlock(&info->mutex); 591 592 return; 593 } 594 595 static irqreturn_t max77693_muic_irq_handler(int irq, void *data) 596 { 597 struct max77693_muic_info *info = data; 598 599 info->irq = irq; 600 schedule_work(&info->irq_work); 601 602 return IRQ_HANDLED; 603 } 604 605 static struct regmap_config max77693_muic_regmap_config = { 606 .reg_bits = 8, 607 .val_bits = 8, 608 }; 609 610 static int max77693_muic_detect_accessory(struct max77693_muic_info *info) 611 { 612 int ret = 0; 613 int adc, chg_type; 614 615 mutex_lock(&info->mutex); 616 617 /* Read STATUSx register to detect accessory */ 618 ret = max77693_bulk_read(info->max77693->regmap_muic, 619 MAX77693_MUIC_REG_STATUS1, 2, info->status); 620 if (ret) { 621 dev_err(info->dev, "failed to read MUIC register\n"); 622 mutex_unlock(&info->mutex); 623 return -EINVAL; 624 } 625 626 adc = info->status[0] & STATUS1_ADC_MASK; 627 adc >>= STATUS1_ADC_SHIFT; 628 629 if (adc != MAX77693_MUIC_ADC_OPEN) { 630 dev_info(info->dev, 631 "external connector is attached (adc:0x%02x)\n", adc); 632 633 ret = max77693_muic_adc_handler(info, adc, true); 634 if (ret < 0) 635 dev_err(info->dev, "failed to detect accessory\n"); 636 goto out; 637 } 638 639 chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 640 chg_type >>= STATUS2_CHGTYP_SHIFT; 641 642 if (chg_type != MAX77693_CHARGER_TYPE_NONE) { 643 dev_info(info->dev, 644 "external connector is attached (chg_type:0x%x)\n", 645 chg_type); 646 647 max77693_muic_chg_handler(info, chg_type, true); 648 if (ret < 0) 649 dev_err(info->dev, "failed to detect charger accessory\n"); 650 } 651 652 out: 653 mutex_unlock(&info->mutex); 654 return ret; 655 } 656 657 static int __devinit max77693_muic_probe(struct platform_device *pdev) 658 { 659 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); 660 struct max77693_muic_info *info; 661 int ret, i; 662 u8 id; 663 664 info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL); 665 if (!info) { 666 dev_err(&pdev->dev, "failed to allocate memory\n"); 667 ret = -ENOMEM; 668 goto err_kfree; 669 } 670 info->dev = &pdev->dev; 671 info->max77693 = max77693; 672 info->max77693->regmap_muic = regmap_init_i2c(info->max77693->muic, 673 &max77693_muic_regmap_config); 674 if (IS_ERR(info->max77693->regmap_muic)) { 675 ret = PTR_ERR(info->max77693->regmap_muic); 676 dev_err(max77693->dev, 677 "failed to allocate register map: %d\n", ret); 678 goto err_regmap; 679 } 680 platform_set_drvdata(pdev, info); 681 mutex_init(&info->mutex); 682 683 INIT_WORK(&info->irq_work, max77693_muic_irq_work); 684 685 /* Support irq domain for MAX77693 MUIC device */ 686 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { 687 struct max77693_muic_irq *muic_irq = &muic_irqs[i]; 688 int virq = 0; 689 690 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq); 691 if (!virq) 692 goto err_irq; 693 muic_irq->virq = virq; 694 695 ret = request_threaded_irq(virq, NULL, 696 max77693_muic_irq_handler, 697 0, muic_irq->name, info); 698 if (ret) { 699 dev_err(&pdev->dev, 700 "failed: irq request (IRQ: %d," 701 " error :%d)\n", 702 muic_irq->irq, ret); 703 704 for (i = i - 1; i >= 0; i--) 705 free_irq(muic_irq->virq, info); 706 goto err_irq; 707 } 708 } 709 710 /* Initialize extcon device */ 711 info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL); 712 if (!info->edev) { 713 dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); 714 ret = -ENOMEM; 715 goto err_irq; 716 } 717 info->edev->name = DEV_NAME; 718 info->edev->supported_cable = max77693_extcon_cable; 719 ret = extcon_dev_register(info->edev, NULL); 720 if (ret) { 721 dev_err(&pdev->dev, "failed to register extcon device\n"); 722 goto err_extcon; 723 } 724 725 /* Check revision number of MUIC device*/ 726 ret = max77693_read_reg(info->max77693->regmap_muic, 727 MAX77693_MUIC_REG_ID, &id); 728 if (ret < 0) { 729 dev_err(&pdev->dev, "failed to read revision number\n"); 730 goto err_extcon; 731 } 732 dev_info(info->dev, "device ID : 0x%x\n", id); 733 734 /* Set ADC debounce time */ 735 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); 736 737 /* Detect accessory on boot */ 738 max77693_muic_detect_accessory(info); 739 740 return ret; 741 742 err_extcon: 743 kfree(info->edev); 744 err_irq: 745 err_regmap: 746 kfree(info); 747 err_kfree: 748 return ret; 749 } 750 751 static int __devexit max77693_muic_remove(struct platform_device *pdev) 752 { 753 struct max77693_muic_info *info = platform_get_drvdata(pdev); 754 int i; 755 756 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) 757 free_irq(muic_irqs[i].virq, info); 758 cancel_work_sync(&info->irq_work); 759 extcon_dev_unregister(info->edev); 760 kfree(info); 761 762 return 0; 763 } 764 765 static struct platform_driver max77693_muic_driver = { 766 .driver = { 767 .name = DEV_NAME, 768 .owner = THIS_MODULE, 769 }, 770 .probe = max77693_muic_probe, 771 .remove = __devexit_p(max77693_muic_remove), 772 }; 773 774 module_platform_driver(max77693_muic_driver); 775 776 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); 777 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 778 MODULE_LICENSE("GPL"); 779 MODULE_ALIAS("platform:extcon-max77693"); 780