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; 243 244 switch (time) { 245 case ADC_DEBOUNCE_TIME_5MS: 246 case ADC_DEBOUNCE_TIME_10MS: 247 case ADC_DEBOUNCE_TIME_25MS: 248 case ADC_DEBOUNCE_TIME_38_62MS: 249 ret = max77693_update_reg(info->max77693->regmap_muic, 250 MAX77693_MUIC_REG_CTRL3, 251 time << CONTROL3_ADCDBSET_SHIFT, 252 CONTROL3_ADCDBSET_MASK); 253 if (ret) 254 dev_err(info->dev, "failed to set ADC debounce time\n"); 255 break; 256 default: 257 dev_err(info->dev, "invalid ADC debounce time\n"); 258 ret = -EINVAL; 259 break; 260 } 261 262 return ret; 263 }; 264 265 static int max77693_muic_set_path(struct max77693_muic_info *info, 266 u8 val, bool attached) 267 { 268 int ret = 0; 269 u8 ctrl1, ctrl2 = 0; 270 271 if (attached) 272 ctrl1 = val; 273 else 274 ctrl1 = CONTROL1_SW_OPEN; 275 276 ret = max77693_update_reg(info->max77693->regmap_muic, 277 MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); 278 if (ret < 0) { 279 dev_err(info->dev, "failed to update MUIC register\n"); 280 goto out; 281 } 282 283 if (attached) 284 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ 285 else 286 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ 287 288 ret = max77693_update_reg(info->max77693->regmap_muic, 289 MAX77693_MUIC_REG_CTRL2, ctrl2, 290 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); 291 if (ret < 0) { 292 dev_err(info->dev, "failed to update MUIC register\n"); 293 goto out; 294 } 295 296 dev_info(info->dev, 297 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 298 ctrl1, ctrl2, attached ? "attached" : "detached"); 299 out: 300 return ret; 301 } 302 303 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info, 304 bool attached) 305 { 306 int ret = 0; 307 int type; 308 int adc, adc1k, adclow; 309 310 if (attached) { 311 adc = info->status[0] & STATUS1_ADC_MASK; 312 adclow = info->status[0] & STATUS1_ADCLOW_MASK; 313 adclow >>= STATUS1_ADCLOW_SHIFT; 314 adc1k = info->status[0] & STATUS1_ADC1K_MASK; 315 adc1k >>= STATUS1_ADC1K_SHIFT; 316 317 /** 318 * [0x1][ADCLow][ADC1K] 319 * [0x1 0 0 ] : USB_OTG 320 * [0x1 1 0 ] : Audio Video Cable with load 321 * [0x1 1 1 ] : MHL 322 */ 323 type = ((0x1 << 8) | (adclow << 1) | adc1k); 324 325 /* Store previous ADC value to handle accessory 326 when accessory will be detached */ 327 info->prev_adc = adc; 328 info->prev_adc_gnd = type; 329 } else 330 type = info->prev_adc_gnd; 331 332 switch (type) { 333 case MAX77693_MUIC_GND_USB_OTG: 334 /* USB_OTG */ 335 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 336 if (ret < 0) 337 goto out; 338 extcon_set_cable_state(info->edev, "USB-Host", attached); 339 break; 340 case MAX77693_MUIC_GND_AV_CABLE_LOAD: 341 /* Audio Video Cable with load */ 342 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 343 if (ret < 0) 344 goto out; 345 extcon_set_cable_state(info->edev, 346 "Audio-video-load", attached); 347 break; 348 case MAX77693_MUIC_GND_MHL_CABLE: 349 /* MHL */ 350 extcon_set_cable_state(info->edev, "MHL", attached); 351 break; 352 default: 353 dev_err(info->dev, "failed to detect %s accessory\n", 354 attached ? "attached" : "detached"); 355 dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n", 356 adc, adclow, adc1k); 357 ret = -EINVAL; 358 break; 359 } 360 361 out: 362 return ret; 363 } 364 365 static int max77693_muic_adc_handler(struct max77693_muic_info *info, 366 int curr_adc, bool attached) 367 { 368 int ret = 0; 369 int adc; 370 371 if (attached) { 372 /* Store ADC value to handle accessory 373 when accessory will be detached */ 374 info->prev_adc = curr_adc; 375 adc = curr_adc; 376 } else 377 adc = info->prev_adc; 378 379 dev_info(info->dev, 380 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 381 attached ? "attached" : "detached", curr_adc, info->prev_adc); 382 383 switch (adc) { 384 case MAX77693_MUIC_ADC_GROUND: 385 /* USB_OTG/MHL/Audio */ 386 max77693_muic_adc_ground_handler(info, attached); 387 break; 388 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: 389 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: 390 /* USB */ 391 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 392 if (ret < 0) 393 goto out; 394 extcon_set_cable_state(info->edev, "USB", attached); 395 break; 396 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: 397 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: 398 /* JIG */ 399 ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached); 400 if (ret < 0) 401 goto out; 402 extcon_set_cable_state(info->edev, "JIG", attached); 403 break; 404 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: 405 /* Audio Video cable with no-load */ 406 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 407 if (ret < 0) 408 goto out; 409 extcon_set_cable_state(info->edev, 410 "Audio-video-noload", attached); 411 break; 412 case MAX77693_MUIC_ADC_SEND_END_BUTTON: 413 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: 414 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: 415 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: 416 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: 417 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: 418 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: 419 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: 420 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: 421 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: 422 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: 423 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: 424 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: 425 case MAX77693_MUIC_ADC_RESERVED_ACC_1: 426 case MAX77693_MUIC_ADC_RESERVED_ACC_2: 427 case MAX77693_MUIC_ADC_RESERVED_ACC_3: 428 case MAX77693_MUIC_ADC_RESERVED_ACC_4: 429 case MAX77693_MUIC_ADC_RESERVED_ACC_5: 430 case MAX77693_MUIC_ADC_CEA936_AUDIO: 431 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: 432 case MAX77693_MUIC_ADC_TTY_CONVERTER: 433 case MAX77693_MUIC_ADC_UART_CABLE: 434 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: 435 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: 436 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: 437 /* This accessory isn't used in general case if it is specially 438 needed to detect additional accessory, should implement 439 proper operation when this accessory is attached/detached. */ 440 dev_info(info->dev, 441 "accessory is %s but it isn't used (adc:0x%x)\n", 442 attached ? "attached" : "detached", adc); 443 goto out; 444 default: 445 dev_err(info->dev, 446 "failed to detect %s accessory (adc:0x%x)\n", 447 attached ? "attached" : "detached", adc); 448 ret = -EINVAL; 449 goto out; 450 } 451 452 out: 453 return ret; 454 } 455 456 static int max77693_muic_chg_handler(struct max77693_muic_info *info, 457 int curr_chg_type, bool attached) 458 { 459 int ret = 0; 460 int chg_type; 461 462 if (attached) { 463 /* Store previous charger type to control 464 when charger accessory will be detached */ 465 info->prev_chg_type = curr_chg_type; 466 chg_type = curr_chg_type; 467 } else 468 chg_type = info->prev_chg_type; 469 470 dev_info(info->dev, 471 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 472 attached ? "attached" : "detached", 473 curr_chg_type, info->prev_chg_type); 474 475 switch (chg_type) { 476 case MAX77693_CHARGER_TYPE_USB: 477 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 478 if (ret < 0) 479 goto out; 480 extcon_set_cable_state(info->edev, "USB", attached); 481 break; 482 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: 483 extcon_set_cable_state(info->edev, 484 "Charge-downstream", attached); 485 break; 486 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 487 extcon_set_cable_state(info->edev, "TA", attached); 488 break; 489 case MAX77693_CHARGER_TYPE_APPLE_500MA: 490 extcon_set_cable_state(info->edev, "Slow-charger", attached); 491 break; 492 case MAX77693_CHARGER_TYPE_APPLE_1A_2A: 493 extcon_set_cable_state(info->edev, "Fast-charger", attached); 494 break; 495 case MAX77693_CHARGER_TYPE_DEAD_BATTERY: 496 break; 497 default: 498 dev_err(info->dev, 499 "failed to detect %s accessory (chg_type:0x%x)\n", 500 attached ? "attached" : "detached", chg_type); 501 ret = -EINVAL; 502 goto out; 503 } 504 505 out: 506 return ret; 507 } 508 509 static void max77693_muic_irq_work(struct work_struct *work) 510 { 511 struct max77693_muic_info *info = container_of(work, 512 struct max77693_muic_info, irq_work); 513 int curr_adc, curr_chg_type; 514 int irq_type = -1; 515 int i, ret = 0; 516 bool attached = true; 517 518 if (!info->edev) 519 return; 520 521 mutex_lock(&info->mutex); 522 523 for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++) 524 if (info->irq == muic_irqs[i].virq) 525 irq_type = muic_irqs[i].irq; 526 527 ret = max77693_bulk_read(info->max77693->regmap_muic, 528 MAX77693_MUIC_REG_STATUS1, 2, info->status); 529 if (ret) { 530 dev_err(info->dev, "failed to read MUIC register\n"); 531 mutex_unlock(&info->mutex); 532 return; 533 } 534 535 switch (irq_type) { 536 case MAX77693_MUIC_IRQ_INT1_ADC: 537 case MAX77693_MUIC_IRQ_INT1_ADC_LOW: 538 case MAX77693_MUIC_IRQ_INT1_ADC_ERR: 539 case MAX77693_MUIC_IRQ_INT1_ADC1K: 540 /* Handle all of accessory except for 541 type of charger accessory */ 542 curr_adc = info->status[0] & STATUS1_ADC_MASK; 543 curr_adc >>= STATUS1_ADC_SHIFT; 544 545 /* Check accessory state which is either detached or attached */ 546 if (curr_adc == MAX77693_MUIC_ADC_OPEN) 547 attached = false; 548 549 ret = max77693_muic_adc_handler(info, curr_adc, attached); 550 break; 551 case MAX77693_MUIC_IRQ_INT2_CHGTYP: 552 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: 553 case MAX77693_MUIC_IRQ_INT2_DCDTMR: 554 case MAX77693_MUIC_IRQ_INT2_DXOVP: 555 case MAX77693_MUIC_IRQ_INT2_VBVOLT: 556 case MAX77693_MUIC_IRQ_INT2_VIDRM: 557 /* Handle charger accessory */ 558 curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 559 curr_chg_type >>= STATUS2_CHGTYP_SHIFT; 560 561 /* Check charger accessory state which 562 is either detached or attached */ 563 if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE) 564 attached = false; 565 566 ret = max77693_muic_chg_handler(info, curr_chg_type, attached); 567 break; 568 case MAX77693_MUIC_IRQ_INT3_EOC: 569 case MAX77693_MUIC_IRQ_INT3_CGMBC: 570 case MAX77693_MUIC_IRQ_INT3_OVP: 571 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: 572 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: 573 case MAX77693_MUIC_IRQ_INT3_BAT_DET: 574 break; 575 default: 576 dev_err(info->dev, "muic interrupt: irq %d occurred\n", 577 irq_type); 578 break; 579 } 580 581 if (ret < 0) 582 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 583 584 mutex_unlock(&info->mutex); 585 586 return; 587 } 588 589 static irqreturn_t max77693_muic_irq_handler(int irq, void *data) 590 { 591 struct max77693_muic_info *info = data; 592 593 info->irq = irq; 594 schedule_work(&info->irq_work); 595 596 return IRQ_HANDLED; 597 } 598 599 static struct regmap_config max77693_muic_regmap_config = { 600 .reg_bits = 8, 601 .val_bits = 8, 602 }; 603 604 static int max77693_muic_detect_accessory(struct max77693_muic_info *info) 605 { 606 int ret = 0; 607 int adc, chg_type; 608 609 mutex_lock(&info->mutex); 610 611 /* Read STATUSx register to detect accessory */ 612 ret = max77693_bulk_read(info->max77693->regmap_muic, 613 MAX77693_MUIC_REG_STATUS1, 2, info->status); 614 if (ret) { 615 dev_err(info->dev, "failed to read MUIC register\n"); 616 mutex_unlock(&info->mutex); 617 return -EINVAL; 618 } 619 620 adc = info->status[0] & STATUS1_ADC_MASK; 621 adc >>= STATUS1_ADC_SHIFT; 622 623 if (adc != MAX77693_MUIC_ADC_OPEN) { 624 dev_info(info->dev, 625 "external connector is attached (adc:0x%02x)\n", adc); 626 627 ret = max77693_muic_adc_handler(info, adc, true); 628 if (ret < 0) 629 dev_err(info->dev, "failed to detect accessory\n"); 630 goto out; 631 } 632 633 chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 634 chg_type >>= STATUS2_CHGTYP_SHIFT; 635 636 if (chg_type != MAX77693_CHARGER_TYPE_NONE) { 637 dev_info(info->dev, 638 "external connector is attached (chg_type:0x%x)\n", 639 chg_type); 640 641 max77693_muic_chg_handler(info, chg_type, true); 642 if (ret < 0) 643 dev_err(info->dev, "failed to detect charger accessory\n"); 644 } 645 646 out: 647 mutex_unlock(&info->mutex); 648 return ret; 649 } 650 651 static int max77693_muic_probe(struct platform_device *pdev) 652 { 653 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); 654 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev); 655 struct max77693_muic_platform_data *muic_pdata = pdata->muic_data; 656 struct max77693_muic_info *info; 657 int ret, i; 658 u8 id; 659 660 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), 661 GFP_KERNEL); 662 if (!info) { 663 dev_err(&pdev->dev, "failed to allocate memory\n"); 664 return -ENOMEM; 665 } 666 info->dev = &pdev->dev; 667 info->max77693 = max77693; 668 if (info->max77693->regmap_muic) { 669 dev_dbg(&pdev->dev, "allocate register map\n"); 670 } else { 671 info->max77693->regmap_muic = devm_regmap_init_i2c( 672 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 return ret; 679 } 680 } 681 platform_set_drvdata(pdev, info); 682 mutex_init(&info->mutex); 683 684 INIT_WORK(&info->irq_work, max77693_muic_irq_work); 685 686 /* Support irq domain for MAX77693 MUIC device */ 687 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { 688 struct max77693_muic_irq *muic_irq = &muic_irqs[i]; 689 unsigned int virq = 0; 690 691 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq); 692 if (!virq) { 693 ret = -EINVAL; 694 goto err_irq; 695 } 696 muic_irq->virq = virq; 697 698 ret = request_threaded_irq(virq, NULL, 699 max77693_muic_irq_handler, 700 IRQF_ONESHOT, muic_irq->name, info); 701 if (ret) { 702 dev_err(&pdev->dev, 703 "failed: irq request (IRQ: %d," 704 " error :%d)\n", 705 muic_irq->irq, ret); 706 707 goto err_irq; 708 } 709 } 710 711 /* Initialize extcon device */ 712 info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev), 713 GFP_KERNEL); 714 if (!info->edev) { 715 dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); 716 ret = -ENOMEM; 717 goto err_irq; 718 } 719 info->edev->name = DEV_NAME; 720 info->edev->supported_cable = max77693_extcon_cable; 721 ret = extcon_dev_register(info->edev, NULL); 722 if (ret) { 723 dev_err(&pdev->dev, "failed to register extcon device\n"); 724 goto err_irq; 725 } 726 727 /* Initialize MUIC register by using platform data */ 728 for (i = 0 ; i < muic_pdata->num_init_data ; i++) { 729 enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR; 730 731 max77693_write_reg(info->max77693->regmap_muic, 732 muic_pdata->init_data[i].addr, 733 muic_pdata->init_data[i].data); 734 735 switch (muic_pdata->init_data[i].addr) { 736 case MAX77693_MUIC_REG_INTMASK1: 737 irq_src = MUIC_INT1; 738 break; 739 case MAX77693_MUIC_REG_INTMASK2: 740 irq_src = MUIC_INT2; 741 break; 742 case MAX77693_MUIC_REG_INTMASK3: 743 irq_src = MUIC_INT3; 744 break; 745 } 746 747 if (irq_src < MAX77693_IRQ_GROUP_NR) 748 info->max77693->irq_masks_cur[irq_src] 749 = muic_pdata->init_data[i].data; 750 } 751 752 /* Check revision number of MUIC device*/ 753 ret = max77693_read_reg(info->max77693->regmap_muic, 754 MAX77693_MUIC_REG_ID, &id); 755 if (ret < 0) { 756 dev_err(&pdev->dev, "failed to read revision number\n"); 757 goto err_irq; 758 } 759 dev_info(info->dev, "device ID : 0x%x\n", id); 760 761 /* Set ADC debounce time */ 762 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); 763 764 /* Detect accessory on boot */ 765 max77693_muic_detect_accessory(info); 766 767 return ret; 768 769 err_irq: 770 while (--i >= 0) 771 free_irq(muic_irqs[i].virq, info); 772 return ret; 773 } 774 775 static int max77693_muic_remove(struct platform_device *pdev) 776 { 777 struct max77693_muic_info *info = platform_get_drvdata(pdev); 778 int i; 779 780 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) 781 free_irq(muic_irqs[i].virq, info); 782 cancel_work_sync(&info->irq_work); 783 extcon_dev_unregister(info->edev); 784 785 return 0; 786 } 787 788 static struct platform_driver max77693_muic_driver = { 789 .driver = { 790 .name = DEV_NAME, 791 .owner = THIS_MODULE, 792 }, 793 .probe = max77693_muic_probe, 794 .remove = max77693_muic_remove, 795 }; 796 797 module_platform_driver(max77693_muic_driver); 798 799 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); 800 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 801 MODULE_LICENSE("GPL"); 802 MODULE_ALIAS("platform:extcon-max77693"); 803