1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) ST-Ericsson SA 2012 4 * 5 * Charger driver for AB8500 6 * 7 * Author: 8 * Johan Palsson <johan.palsson@stericsson.com> 9 * Karl Komierowski <karl.komierowski@stericsson.com> 10 * Arun R Murthy <arun.murthy@stericsson.com> 11 */ 12 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/device.h> 16 #include <linux/component.h> 17 #include <linux/interrupt.h> 18 #include <linux/delay.h> 19 #include <linux/notifier.h> 20 #include <linux/slab.h> 21 #include <linux/platform_device.h> 22 #include <linux/power_supply.h> 23 #include <linux/completion.h> 24 #include <linux/regulator/consumer.h> 25 #include <linux/err.h> 26 #include <linux/workqueue.h> 27 #include <linux/kobject.h> 28 #include <linux/of.h> 29 #include <linux/mfd/core.h> 30 #include <linux/mfd/abx500/ab8500.h> 31 #include <linux/mfd/abx500.h> 32 #include <linux/usb/otg.h> 33 #include <linux/mutex.h> 34 #include <linux/iio/consumer.h> 35 36 #include "ab8500-bm.h" 37 #include "ab8500-chargalg.h" 38 39 /* Charger constants */ 40 #define NO_PW_CONN 0 41 #define AC_PW_CONN 1 42 #define USB_PW_CONN 2 43 44 #define MAIN_WDOG_ENA 0x01 45 #define MAIN_WDOG_KICK 0x02 46 #define MAIN_WDOG_DIS 0x00 47 #define CHARG_WD_KICK 0x01 48 #define MAIN_CH_ENA 0x01 49 #define MAIN_CH_NO_OVERSHOOT_ENA_N 0x02 50 #define USB_CH_ENA 0x01 51 #define USB_CHG_NO_OVERSHOOT_ENA_N 0x02 52 #define MAIN_CH_DET 0x01 53 #define MAIN_CH_CV_ON 0x04 54 #define USB_CH_CV_ON 0x08 55 #define VBUS_DET_DBNC100 0x02 56 #define VBUS_DET_DBNC1 0x01 57 #define OTP_ENABLE_WD 0x01 58 #define DROP_COUNT_RESET 0x01 59 #define USB_CH_DET 0x01 60 61 #define MAIN_CH_INPUT_CURR_SHIFT 4 62 #define VBUS_IN_CURR_LIM_SHIFT 4 63 #define AUTO_VBUS_IN_CURR_LIM_SHIFT 4 64 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */ 65 66 #define LED_INDICATOR_PWM_ENA 0x01 67 #define LED_INDICATOR_PWM_DIS 0x00 68 #define LED_IND_CUR_5MA 0x04 69 #define LED_INDICATOR_PWM_DUTY_252_256 0xBF 70 71 /* HW failure constants */ 72 #define MAIN_CH_TH_PROT 0x02 73 #define VBUS_CH_NOK 0x08 74 #define USB_CH_TH_PROT 0x02 75 #define VBUS_OVV_TH 0x01 76 #define MAIN_CH_NOK 0x01 77 #define VBUS_DET 0x80 78 79 #define MAIN_CH_STATUS2_MAINCHGDROP 0x80 80 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40 81 #define USB_CH_VBUSDROP 0x40 82 #define USB_CH_VBUSDETDBNC 0x01 83 84 /* UsbLineStatus register bit masks */ 85 #define AB8500_USB_LINK_STATUS 0x78 86 #define AB8505_USB_LINK_STATUS 0xF8 87 #define AB8500_STD_HOST_SUSP 0x18 88 #define USB_LINK_STATUS_SHIFT 3 89 90 /* Watchdog timeout constant */ 91 #define WD_TIMER 0x30 /* 4min */ 92 #define WD_KICK_INTERVAL (60 * HZ) 93 94 /* Lowest charger voltage is 3.39V -> 0x4E */ 95 #define LOW_VOLT_REG 0x4E 96 97 /* Step up/down delay in us */ 98 #define STEP_UDELAY 1000 99 100 #define CHARGER_STATUS_POLL 10 /* in ms */ 101 102 #define CHG_WD_INTERVAL (60 * HZ) 103 104 #define AB8500_SW_CONTROL_FALLBACK 0x03 105 /* Wait for enumeration before charing in us */ 106 #define WAIT_ACA_RID_ENUMERATION (5 * 1000) 107 /*External charger control*/ 108 #define AB8500_SYS_CHARGER_CONTROL_REG 0x52 109 #define EXTERNAL_CHARGER_DISABLE_REG_VAL 0x03 110 #define EXTERNAL_CHARGER_ENABLE_REG_VAL 0x07 111 112 /* UsbLineStatus register - usb types */ 113 enum ab8500_charger_link_status { 114 USB_STAT_NOT_CONFIGURED, 115 USB_STAT_STD_HOST_NC, 116 USB_STAT_STD_HOST_C_NS, 117 USB_STAT_STD_HOST_C_S, 118 USB_STAT_HOST_CHG_NM, 119 USB_STAT_HOST_CHG_HS, 120 USB_STAT_HOST_CHG_HS_CHIRP, 121 USB_STAT_DEDICATED_CHG, 122 USB_STAT_ACA_RID_A, 123 USB_STAT_ACA_RID_B, 124 USB_STAT_ACA_RID_C_NM, 125 USB_STAT_ACA_RID_C_HS, 126 USB_STAT_ACA_RID_C_HS_CHIRP, 127 USB_STAT_HM_IDGND, 128 USB_STAT_RESERVED, 129 USB_STAT_NOT_VALID_LINK, 130 USB_STAT_PHY_EN, 131 USB_STAT_SUP_NO_IDGND_VBUS, 132 USB_STAT_SUP_IDGND_VBUS, 133 USB_STAT_CHARGER_LINE_1, 134 USB_STAT_CARKIT_1, 135 USB_STAT_CARKIT_2, 136 USB_STAT_ACA_DOCK_CHARGER, 137 }; 138 139 enum ab8500_usb_state { 140 AB8500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ 141 AB8500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ 142 AB8500_BM_USB_STATE_CONFIGURED, 143 AB8500_BM_USB_STATE_SUSPEND, 144 AB8500_BM_USB_STATE_RESUME, 145 AB8500_BM_USB_STATE_MAX, 146 }; 147 148 /* VBUS input current limits supported in AB8500 in mA */ 149 #define USB_CH_IP_CUR_LVL_0P05 50 150 #define USB_CH_IP_CUR_LVL_0P09 98 151 #define USB_CH_IP_CUR_LVL_0P19 193 152 #define USB_CH_IP_CUR_LVL_0P29 290 153 #define USB_CH_IP_CUR_LVL_0P38 380 154 #define USB_CH_IP_CUR_LVL_0P45 450 155 #define USB_CH_IP_CUR_LVL_0P5 500 156 #define USB_CH_IP_CUR_LVL_0P6 600 157 #define USB_CH_IP_CUR_LVL_0P7 700 158 #define USB_CH_IP_CUR_LVL_0P8 800 159 #define USB_CH_IP_CUR_LVL_0P9 900 160 #define USB_CH_IP_CUR_LVL_1P0 1000 161 #define USB_CH_IP_CUR_LVL_1P1 1100 162 #define USB_CH_IP_CUR_LVL_1P3 1300 163 #define USB_CH_IP_CUR_LVL_1P4 1400 164 #define USB_CH_IP_CUR_LVL_1P5 1500 165 166 #define VBAT_TRESH_IP_CUR_RED 3800 167 168 #define to_ab8500_charger_usb_device_info(x) container_of((x), \ 169 struct ab8500_charger, usb_chg) 170 #define to_ab8500_charger_ac_device_info(x) container_of((x), \ 171 struct ab8500_charger, ac_chg) 172 173 /** 174 * struct ab8500_charger_interrupts - ab8500 interupts 175 * @name: name of the interrupt 176 * @isr function pointer to the isr 177 */ 178 struct ab8500_charger_interrupts { 179 char *name; 180 irqreturn_t (*isr)(int irq, void *data); 181 }; 182 183 struct ab8500_charger_info { 184 int charger_connected; 185 int charger_online; 186 int charger_voltage; 187 int cv_active; 188 bool wd_expired; 189 int charger_current; 190 }; 191 192 struct ab8500_charger_event_flags { 193 bool mainextchnotok; 194 bool main_thermal_prot; 195 bool usb_thermal_prot; 196 bool vbus_ovv; 197 bool usbchargernotok; 198 bool chgwdexp; 199 bool vbus_collapse; 200 bool vbus_drop_end; 201 }; 202 203 struct ab8500_charger_usb_state { 204 int usb_current; 205 int usb_current_tmp; 206 enum ab8500_usb_state state; 207 enum ab8500_usb_state state_tmp; 208 spinlock_t usb_lock; 209 }; 210 211 struct ab8500_charger_max_usb_in_curr { 212 int usb_type_max; 213 int set_max; 214 int calculated_max; 215 }; 216 217 /** 218 * struct ab8500_charger - ab8500 Charger device information 219 * @dev: Pointer to the structure device 220 * @vbus_detected: VBUS detected 221 * @vbus_detected_start: 222 * VBUS detected during startup 223 * @ac_conn: This will be true when the AC charger has been plugged 224 * @vddadc_en_ac: Indicate if VDD ADC supply is enabled because AC 225 * charger is enabled 226 * @vddadc_en_usb: Indicate if VDD ADC supply is enabled because USB 227 * charger is enabled 228 * @vbat Battery voltage 229 * @old_vbat Previously measured battery voltage 230 * @usb_device_is_unrecognised USB device is unrecognised by the hardware 231 * @autopower Indicate if we should have automatic pwron after pwrloss 232 * @autopower_cfg platform specific power config support for "pwron after pwrloss" 233 * @invalid_charger_detect_state State when forcing AB to use invalid charger 234 * @is_aca_rid: Incicate if accessory is ACA type 235 * @current_stepping_sessions: 236 * Counter for current stepping sessions 237 * @parent: Pointer to the struct ab8500 238 * @adc_main_charger_v ADC channel for main charger voltage 239 * @adc_main_charger_c ADC channel for main charger current 240 * @adc_vbus_v ADC channel for USB charger voltage 241 * @adc_usb_charger_c ADC channel for USB charger current 242 * @bm: Platform specific battery management information 243 * @flags: Structure for information about events triggered 244 * @usb_state: Structure for usb stack information 245 * @max_usb_in_curr: Max USB charger input current 246 * @ac_chg: AC charger power supply 247 * @usb_chg: USB charger power supply 248 * @ac: Structure that holds the AC charger properties 249 * @usb: Structure that holds the USB charger properties 250 * @regu: Pointer to the struct regulator 251 * @charger_wq: Work queue for the IRQs and checking HW state 252 * @usb_ipt_crnt_lock: Lock to protect VBUS input current setting from mutuals 253 * @pm_lock: Lock to prevent system to suspend 254 * @check_vbat_work Work for checking vbat threshold to adjust vbus current 255 * @check_hw_failure_work: Work for checking HW state 256 * @check_usbchgnotok_work: Work for checking USB charger not ok status 257 * @kick_wd_work: Work for kicking the charger watchdog in case 258 * of ABB rev 1.* due to the watchog logic bug 259 * @ac_charger_attached_work: Work for checking if AC charger is still 260 * connected 261 * @usb_charger_attached_work: Work for checking if USB charger is still 262 * connected 263 * @ac_work: Work for checking AC charger connection 264 * @detect_usb_type_work: Work for detecting the USB type connected 265 * @usb_link_status_work: Work for checking the new USB link status 266 * @usb_state_changed_work: Work for checking USB state 267 * @attach_work: Work for detecting USB type 268 * @vbus_drop_end_work: Work for detecting VBUS drop end 269 * @check_main_thermal_prot_work: 270 * Work for checking Main thermal status 271 * @check_usb_thermal_prot_work: 272 * Work for checking USB thermal status 273 * @charger_attached_mutex: For controlling the wakelock 274 */ 275 struct ab8500_charger { 276 struct device *dev; 277 bool vbus_detected; 278 bool vbus_detected_start; 279 bool ac_conn; 280 bool vddadc_en_ac; 281 bool vddadc_en_usb; 282 int vbat; 283 int old_vbat; 284 bool usb_device_is_unrecognised; 285 bool autopower; 286 bool autopower_cfg; 287 int invalid_charger_detect_state; 288 int is_aca_rid; 289 atomic_t current_stepping_sessions; 290 struct ab8500 *parent; 291 struct iio_channel *adc_main_charger_v; 292 struct iio_channel *adc_main_charger_c; 293 struct iio_channel *adc_vbus_v; 294 struct iio_channel *adc_usb_charger_c; 295 struct abx500_bm_data *bm; 296 struct ab8500_charger_event_flags flags; 297 struct ab8500_charger_usb_state usb_state; 298 struct ab8500_charger_max_usb_in_curr max_usb_in_curr; 299 struct ux500_charger ac_chg; 300 struct ux500_charger usb_chg; 301 struct ab8500_charger_info ac; 302 struct ab8500_charger_info usb; 303 struct regulator *regu; 304 struct workqueue_struct *charger_wq; 305 struct mutex usb_ipt_crnt_lock; 306 struct delayed_work check_vbat_work; 307 struct delayed_work check_hw_failure_work; 308 struct delayed_work check_usbchgnotok_work; 309 struct delayed_work kick_wd_work; 310 struct delayed_work usb_state_changed_work; 311 struct delayed_work attach_work; 312 struct delayed_work ac_charger_attached_work; 313 struct delayed_work usb_charger_attached_work; 314 struct delayed_work vbus_drop_end_work; 315 struct work_struct ac_work; 316 struct work_struct detect_usb_type_work; 317 struct work_struct usb_link_status_work; 318 struct work_struct check_main_thermal_prot_work; 319 struct work_struct check_usb_thermal_prot_work; 320 struct usb_phy *usb_phy; 321 struct notifier_block nb; 322 struct mutex charger_attached_mutex; 323 }; 324 325 /* AC properties */ 326 static enum power_supply_property ab8500_charger_ac_props[] = { 327 POWER_SUPPLY_PROP_HEALTH, 328 POWER_SUPPLY_PROP_PRESENT, 329 POWER_SUPPLY_PROP_ONLINE, 330 POWER_SUPPLY_PROP_VOLTAGE_NOW, 331 POWER_SUPPLY_PROP_VOLTAGE_AVG, 332 POWER_SUPPLY_PROP_CURRENT_NOW, 333 }; 334 335 /* USB properties */ 336 static enum power_supply_property ab8500_charger_usb_props[] = { 337 POWER_SUPPLY_PROP_HEALTH, 338 POWER_SUPPLY_PROP_CURRENT_AVG, 339 POWER_SUPPLY_PROP_PRESENT, 340 POWER_SUPPLY_PROP_ONLINE, 341 POWER_SUPPLY_PROP_VOLTAGE_NOW, 342 POWER_SUPPLY_PROP_VOLTAGE_AVG, 343 POWER_SUPPLY_PROP_CURRENT_NOW, 344 }; 345 346 /* 347 * Function for enabling and disabling sw fallback mode 348 * should always be disabled when no charger is connected. 349 */ 350 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di, 351 bool fallback) 352 { 353 u8 val; 354 u8 reg; 355 u8 bank; 356 u8 bit; 357 int ret; 358 359 dev_dbg(di->dev, "SW Fallback: %d\n", fallback); 360 361 if (is_ab8500(di->parent)) { 362 bank = 0x15; 363 reg = 0x0; 364 bit = 3; 365 } else { 366 bank = AB8500_SYS_CTRL1_BLOCK; 367 reg = AB8500_SW_CONTROL_FALLBACK; 368 bit = 0; 369 } 370 371 /* read the register containing fallback bit */ 372 ret = abx500_get_register_interruptible(di->dev, bank, reg, &val); 373 if (ret < 0) { 374 dev_err(di->dev, "%d read failed\n", __LINE__); 375 return; 376 } 377 378 if (is_ab8500(di->parent)) { 379 /* enable the OPT emulation registers */ 380 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2); 381 if (ret) { 382 dev_err(di->dev, "%d write failed\n", __LINE__); 383 goto disable_otp; 384 } 385 } 386 387 if (fallback) 388 val |= (1 << bit); 389 else 390 val &= ~(1 << bit); 391 392 /* write back the changed fallback bit value to register */ 393 ret = abx500_set_register_interruptible(di->dev, bank, reg, val); 394 if (ret) { 395 dev_err(di->dev, "%d write failed\n", __LINE__); 396 } 397 398 disable_otp: 399 if (is_ab8500(di->parent)) { 400 /* disable the set OTP registers again */ 401 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0); 402 if (ret) { 403 dev_err(di->dev, "%d write failed\n", __LINE__); 404 } 405 } 406 } 407 408 /** 409 * ab8500_power_supply_changed - a wrapper with local extensions for 410 * power_supply_changed 411 * @di: pointer to the ab8500_charger structure 412 * @psy: pointer to power_supply_that have changed. 413 * 414 */ 415 static void ab8500_power_supply_changed(struct ab8500_charger *di, 416 struct power_supply *psy) 417 { 418 /* 419 * This happens if we get notifications or interrupts and 420 * the platform has been configured not to support one or 421 * other type of charging. 422 */ 423 if (!psy) 424 return; 425 426 if (di->autopower_cfg) { 427 if (!di->usb.charger_connected && 428 !di->ac.charger_connected && 429 di->autopower) { 430 di->autopower = false; 431 ab8500_enable_disable_sw_fallback(di, false); 432 } else if (!di->autopower && 433 (di->ac.charger_connected || 434 di->usb.charger_connected)) { 435 di->autopower = true; 436 ab8500_enable_disable_sw_fallback(di, true); 437 } 438 } 439 power_supply_changed(psy); 440 } 441 442 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di, 443 bool connected) 444 { 445 if (connected != di->usb.charger_connected) { 446 dev_dbg(di->dev, "USB connected:%i\n", connected); 447 di->usb.charger_connected = connected; 448 449 if (!connected) 450 di->flags.vbus_drop_end = false; 451 452 /* 453 * Sometimes the platform is configured not to support 454 * USB charging and no psy has been created, but we still 455 * will get these notifications. 456 */ 457 if (di->usb_chg.psy) { 458 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, 459 "present"); 460 } 461 462 if (connected) { 463 mutex_lock(&di->charger_attached_mutex); 464 mutex_unlock(&di->charger_attached_mutex); 465 466 if (is_ab8500(di->parent)) 467 queue_delayed_work(di->charger_wq, 468 &di->usb_charger_attached_work, 469 HZ); 470 } else { 471 cancel_delayed_work_sync(&di->usb_charger_attached_work); 472 mutex_lock(&di->charger_attached_mutex); 473 mutex_unlock(&di->charger_attached_mutex); 474 } 475 } 476 } 477 478 /** 479 * ab8500_charger_get_ac_voltage() - get ac charger voltage 480 * @di: pointer to the ab8500_charger structure 481 * 482 * Returns ac charger voltage (on success) 483 */ 484 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di) 485 { 486 int vch, ret; 487 488 /* Only measure voltage if the charger is connected */ 489 if (di->ac.charger_connected) { 490 ret = iio_read_channel_processed(di->adc_main_charger_v, &vch); 491 if (ret < 0) 492 dev_err(di->dev, "%s ADC conv failed,\n", __func__); 493 } else { 494 vch = 0; 495 } 496 return vch; 497 } 498 499 /** 500 * ab8500_charger_ac_cv() - check if the main charger is in CV mode 501 * @di: pointer to the ab8500_charger structure 502 * 503 * Returns ac charger CV mode (on success) else error code 504 */ 505 static int ab8500_charger_ac_cv(struct ab8500_charger *di) 506 { 507 u8 val; 508 int ret = 0; 509 510 /* Only check CV mode if the charger is online */ 511 if (di->ac.charger_online) { 512 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 513 AB8500_CH_STATUS1_REG, &val); 514 if (ret < 0) { 515 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 516 return 0; 517 } 518 519 if (val & MAIN_CH_CV_ON) 520 ret = 1; 521 else 522 ret = 0; 523 } 524 525 return ret; 526 } 527 528 /** 529 * ab8500_charger_get_vbus_voltage() - get vbus voltage 530 * @di: pointer to the ab8500_charger structure 531 * 532 * This function returns the vbus voltage. 533 * Returns vbus voltage (on success) 534 */ 535 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di) 536 { 537 int vch, ret; 538 539 /* Only measure voltage if the charger is connected */ 540 if (di->usb.charger_connected) { 541 ret = iio_read_channel_processed(di->adc_vbus_v, &vch); 542 if (ret < 0) 543 dev_err(di->dev, "%s ADC conv failed,\n", __func__); 544 } else { 545 vch = 0; 546 } 547 return vch; 548 } 549 550 /** 551 * ab8500_charger_get_usb_current() - get usb charger current 552 * @di: pointer to the ab8500_charger structure 553 * 554 * This function returns the usb charger current. 555 * Returns usb current (on success) and error code on failure 556 */ 557 static int ab8500_charger_get_usb_current(struct ab8500_charger *di) 558 { 559 int ich, ret; 560 561 /* Only measure current if the charger is online */ 562 if (di->usb.charger_online) { 563 ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich); 564 if (ret < 0) 565 dev_err(di->dev, "%s ADC conv failed,\n", __func__); 566 } else { 567 ich = 0; 568 } 569 return ich; 570 } 571 572 /** 573 * ab8500_charger_get_ac_current() - get ac charger current 574 * @di: pointer to the ab8500_charger structure 575 * 576 * This function returns the ac charger current. 577 * Returns ac current (on success) and error code on failure. 578 */ 579 static int ab8500_charger_get_ac_current(struct ab8500_charger *di) 580 { 581 int ich, ret; 582 583 /* Only measure current if the charger is online */ 584 if (di->ac.charger_online) { 585 ret = iio_read_channel_processed(di->adc_main_charger_c, &ich); 586 if (ret < 0) 587 dev_err(di->dev, "%s ADC conv failed,\n", __func__); 588 } else { 589 ich = 0; 590 } 591 return ich; 592 } 593 594 /** 595 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode 596 * @di: pointer to the ab8500_charger structure 597 * 598 * Returns ac charger CV mode (on success) else error code 599 */ 600 static int ab8500_charger_usb_cv(struct ab8500_charger *di) 601 { 602 int ret; 603 u8 val; 604 605 /* Only check CV mode if the charger is online */ 606 if (di->usb.charger_online) { 607 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 608 AB8500_CH_USBCH_STAT1_REG, &val); 609 if (ret < 0) { 610 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 611 return 0; 612 } 613 614 if (val & USB_CH_CV_ON) 615 ret = 1; 616 else 617 ret = 0; 618 } else { 619 ret = 0; 620 } 621 622 return ret; 623 } 624 625 /** 626 * ab8500_charger_detect_chargers() - Detect the connected chargers 627 * @di: pointer to the ab8500_charger structure 628 * @probe: if probe, don't delay and wait for HW 629 * 630 * Returns the type of charger connected. 631 * For USB it will not mean we can actually charge from it 632 * but that there is a USB cable connected that we have to 633 * identify. This is used during startup when we don't get 634 * interrupts of the charger detection 635 * 636 * Returns an integer value, that means, 637 * NO_PW_CONN no power supply is connected 638 * AC_PW_CONN if the AC power supply is connected 639 * USB_PW_CONN if the USB power supply is connected 640 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected 641 */ 642 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe) 643 { 644 int result = NO_PW_CONN; 645 int ret; 646 u8 val; 647 648 /* Check for AC charger */ 649 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 650 AB8500_CH_STATUS1_REG, &val); 651 if (ret < 0) { 652 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 653 return ret; 654 } 655 656 if (val & MAIN_CH_DET) 657 result = AC_PW_CONN; 658 659 /* Check for USB charger */ 660 661 if (!probe) { 662 /* 663 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100 664 * when disconnecting ACA even though no 665 * charger was connected. Try waiting a little 666 * longer than the 100 ms of VBUS_DET_DBNC100... 667 */ 668 msleep(110); 669 } 670 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 671 AB8500_CH_USBCH_STAT1_REG, &val); 672 if (ret < 0) { 673 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 674 return ret; 675 } 676 dev_dbg(di->dev, 677 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__, 678 val); 679 if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100)) 680 result |= USB_PW_CONN; 681 682 return result; 683 } 684 685 /** 686 * ab8500_charger_max_usb_curr() - get the max curr for the USB type 687 * @di: pointer to the ab8500_charger structure 688 * @link_status: the identified USB type 689 * 690 * Get the maximum current that is allowed to be drawn from the host 691 * based on the USB type. 692 * Returns error code in case of failure else 0 on success 693 */ 694 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, 695 enum ab8500_charger_link_status link_status) 696 { 697 int ret = 0; 698 699 di->usb_device_is_unrecognised = false; 700 701 /* 702 * Platform only supports USB 2.0. 703 * This means that charging current from USB source 704 * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_* 705 * should set USB_CH_IP_CUR_LVL_0P5. 706 */ 707 708 switch (link_status) { 709 case USB_STAT_STD_HOST_NC: 710 case USB_STAT_STD_HOST_C_NS: 711 case USB_STAT_STD_HOST_C_S: 712 dev_dbg(di->dev, "USB Type - Standard host is " 713 "detected through USB driver\n"); 714 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 715 di->is_aca_rid = 0; 716 break; 717 case USB_STAT_HOST_CHG_HS_CHIRP: 718 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 719 di->is_aca_rid = 0; 720 break; 721 case USB_STAT_HOST_CHG_HS: 722 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 723 di->is_aca_rid = 0; 724 break; 725 case USB_STAT_ACA_RID_C_HS: 726 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9; 727 di->is_aca_rid = 0; 728 break; 729 case USB_STAT_ACA_RID_A: 730 /* 731 * Dedicated charger level minus maximum current accessory 732 * can consume (900mA). Closest level is 500mA 733 */ 734 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n"); 735 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 736 di->is_aca_rid = 1; 737 break; 738 case USB_STAT_ACA_RID_B: 739 /* 740 * Dedicated charger level minus 120mA (20mA for ACA and 741 * 100mA for potential accessory). Closest level is 1300mA 742 */ 743 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3; 744 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, 745 di->max_usb_in_curr.usb_type_max); 746 di->is_aca_rid = 1; 747 break; 748 case USB_STAT_HOST_CHG_NM: 749 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 750 di->is_aca_rid = 0; 751 break; 752 case USB_STAT_DEDICATED_CHG: 753 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; 754 di->is_aca_rid = 0; 755 break; 756 case USB_STAT_ACA_RID_C_HS_CHIRP: 757 case USB_STAT_ACA_RID_C_NM: 758 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5; 759 di->is_aca_rid = 1; 760 break; 761 case USB_STAT_NOT_CONFIGURED: 762 if (di->vbus_detected) { 763 di->usb_device_is_unrecognised = true; 764 dev_dbg(di->dev, "USB Type - Legacy charger.\n"); 765 di->max_usb_in_curr.usb_type_max = 766 USB_CH_IP_CUR_LVL_1P5; 767 break; 768 } 769 fallthrough; 770 case USB_STAT_HM_IDGND: 771 dev_err(di->dev, "USB Type - Charging not allowed\n"); 772 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; 773 ret = -ENXIO; 774 break; 775 case USB_STAT_RESERVED: 776 if (is_ab8500(di->parent)) { 777 di->flags.vbus_collapse = true; 778 dev_err(di->dev, "USB Type - USB_STAT_RESERVED " 779 "VBUS has collapsed\n"); 780 ret = -ENXIO; 781 break; 782 } else { 783 dev_dbg(di->dev, "USB Type - Charging not allowed\n"); 784 di->max_usb_in_curr.usb_type_max = 785 USB_CH_IP_CUR_LVL_0P05; 786 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", 787 link_status, 788 di->max_usb_in_curr.usb_type_max); 789 ret = -ENXIO; 790 break; 791 } 792 case USB_STAT_CARKIT_1: 793 case USB_STAT_CARKIT_2: 794 case USB_STAT_ACA_DOCK_CHARGER: 795 case USB_STAT_CHARGER_LINE_1: 796 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 797 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, 798 di->max_usb_in_curr.usb_type_max); 799 break; 800 case USB_STAT_NOT_VALID_LINK: 801 dev_err(di->dev, "USB Type invalid - try charging anyway\n"); 802 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 803 break; 804 805 default: 806 dev_err(di->dev, "USB Type - Unknown\n"); 807 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; 808 ret = -ENXIO; 809 break; 810 } 811 812 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; 813 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", 814 link_status, di->max_usb_in_curr.set_max); 815 816 return ret; 817 } 818 819 /** 820 * ab8500_charger_read_usb_type() - read the type of usb connected 821 * @di: pointer to the ab8500_charger structure 822 * 823 * Detect the type of the plugged USB 824 * Returns error code in case of failure else 0 on success 825 */ 826 static int ab8500_charger_read_usb_type(struct ab8500_charger *di) 827 { 828 int ret; 829 u8 val; 830 831 ret = abx500_get_register_interruptible(di->dev, 832 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val); 833 if (ret < 0) { 834 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 835 return ret; 836 } 837 if (is_ab8500(di->parent)) 838 ret = abx500_get_register_interruptible(di->dev, AB8500_USB, 839 AB8500_USB_LINE_STAT_REG, &val); 840 else 841 ret = abx500_get_register_interruptible(di->dev, 842 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); 843 if (ret < 0) { 844 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 845 return ret; 846 } 847 848 /* get the USB type */ 849 if (is_ab8500(di->parent)) 850 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; 851 else 852 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT; 853 ret = ab8500_charger_max_usb_curr(di, 854 (enum ab8500_charger_link_status) val); 855 856 return ret; 857 } 858 859 /** 860 * ab8500_charger_detect_usb_type() - get the type of usb connected 861 * @di: pointer to the ab8500_charger structure 862 * 863 * Detect the type of the plugged USB 864 * Returns error code in case of failure else 0 on success 865 */ 866 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di) 867 { 868 int i, ret; 869 u8 val; 870 871 /* 872 * On getting the VBUS rising edge detect interrupt there 873 * is a 250ms delay after which the register UsbLineStatus 874 * is filled with valid data. 875 */ 876 for (i = 0; i < 10; i++) { 877 msleep(250); 878 ret = abx500_get_register_interruptible(di->dev, 879 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, 880 &val); 881 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n", 882 __func__, val); 883 if (ret < 0) { 884 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 885 return ret; 886 } 887 888 if (is_ab8500(di->parent)) 889 ret = abx500_get_register_interruptible(di->dev, 890 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); 891 else 892 ret = abx500_get_register_interruptible(di->dev, 893 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val); 894 if (ret < 0) { 895 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 896 return ret; 897 } 898 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__, 899 val); 900 /* 901 * Until the IT source register is read the UsbLineStatus 902 * register is not updated, hence doing the same 903 * Revisit this: 904 */ 905 906 /* get the USB type */ 907 if (is_ab8500(di->parent)) 908 val = (val & AB8500_USB_LINK_STATUS) >> 909 USB_LINK_STATUS_SHIFT; 910 else 911 val = (val & AB8505_USB_LINK_STATUS) >> 912 USB_LINK_STATUS_SHIFT; 913 if (val) 914 break; 915 } 916 ret = ab8500_charger_max_usb_curr(di, 917 (enum ab8500_charger_link_status) val); 918 919 return ret; 920 } 921 922 /* 923 * This array maps the raw hex value to charger voltage used by the AB8500 924 * Values taken from the UM0836 925 */ 926 static int ab8500_charger_voltage_map[] = { 927 3500 , 928 3525 , 929 3550 , 930 3575 , 931 3600 , 932 3625 , 933 3650 , 934 3675 , 935 3700 , 936 3725 , 937 3750 , 938 3775 , 939 3800 , 940 3825 , 941 3850 , 942 3875 , 943 3900 , 944 3925 , 945 3950 , 946 3975 , 947 4000 , 948 4025 , 949 4050 , 950 4060 , 951 4070 , 952 4080 , 953 4090 , 954 4100 , 955 4110 , 956 4120 , 957 4130 , 958 4140 , 959 4150 , 960 4160 , 961 4170 , 962 4180 , 963 4190 , 964 4200 , 965 4210 , 966 4220 , 967 4230 , 968 4240 , 969 4250 , 970 4260 , 971 4270 , 972 4280 , 973 4290 , 974 4300 , 975 4310 , 976 4320 , 977 4330 , 978 4340 , 979 4350 , 980 4360 , 981 4370 , 982 4380 , 983 4390 , 984 4400 , 985 4410 , 986 4420 , 987 4430 , 988 4440 , 989 4450 , 990 4460 , 991 4470 , 992 4480 , 993 4490 , 994 4500 , 995 4510 , 996 4520 , 997 4530 , 998 4540 , 999 4550 , 1000 4560 , 1001 4570 , 1002 4580 , 1003 4590 , 1004 4600 , 1005 }; 1006 1007 static int ab8500_voltage_to_regval(int voltage) 1008 { 1009 int i; 1010 1011 /* Special case for voltage below 3.5V */ 1012 if (voltage < ab8500_charger_voltage_map[0]) 1013 return LOW_VOLT_REG; 1014 1015 for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) { 1016 if (voltage < ab8500_charger_voltage_map[i]) 1017 return i - 1; 1018 } 1019 1020 /* If not last element, return error */ 1021 i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1; 1022 if (voltage == ab8500_charger_voltage_map[i]) 1023 return i; 1024 else 1025 return -1; 1026 } 1027 1028 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr) 1029 { 1030 int i; 1031 1032 if (curr < di->bm->chg_output_curr[0]) 1033 return 0; 1034 1035 for (i = 0; i < di->bm->n_chg_out_curr; i++) { 1036 if (curr < di->bm->chg_output_curr[i]) 1037 return i - 1; 1038 } 1039 1040 /* If not last element, return error */ 1041 i = di->bm->n_chg_out_curr - 1; 1042 if (curr == di->bm->chg_output_curr[i]) 1043 return i; 1044 else 1045 return -1; 1046 } 1047 1048 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr) 1049 { 1050 int i; 1051 1052 if (curr < di->bm->chg_input_curr[0]) 1053 return 0; 1054 1055 for (i = 0; i < di->bm->n_chg_in_curr; i++) { 1056 if (curr < di->bm->chg_input_curr[i]) 1057 return i - 1; 1058 } 1059 1060 /* If not last element, return error */ 1061 i = di->bm->n_chg_in_curr - 1; 1062 if (curr == di->bm->chg_input_curr[i]) 1063 return i; 1064 else 1065 return -1; 1066 } 1067 1068 /** 1069 * ab8500_charger_get_usb_cur() - get usb current 1070 * @di: pointer to the ab8500_charger structre 1071 * 1072 * The usb stack provides the maximum current that can be drawn from 1073 * the standard usb host. This will be in mA. 1074 * This function converts current in mA to a value that can be written 1075 * to the register. Returns -1 if charging is not allowed 1076 */ 1077 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di) 1078 { 1079 int ret = 0; 1080 switch (di->usb_state.usb_current) { 1081 case 100: 1082 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09; 1083 break; 1084 case 200: 1085 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19; 1086 break; 1087 case 300: 1088 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29; 1089 break; 1090 case 400: 1091 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38; 1092 break; 1093 case 500: 1094 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5; 1095 break; 1096 default: 1097 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05; 1098 ret = -EPERM; 1099 break; 1100 } 1101 di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max; 1102 return ret; 1103 } 1104 1105 /** 1106 * ab8500_charger_check_continue_stepping() - Check to allow stepping 1107 * @di: pointer to the ab8500_charger structure 1108 * @reg: select what charger register to check 1109 * 1110 * Check if current stepping should be allowed to continue. 1111 * Checks if charger source has not collapsed. If it has, further stepping 1112 * is not allowed. 1113 */ 1114 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di, 1115 int reg) 1116 { 1117 if (reg == AB8500_USBCH_IPT_CRNTLVL_REG) 1118 return !di->flags.vbus_drop_end; 1119 else 1120 return true; 1121 } 1122 1123 /** 1124 * ab8500_charger_set_current() - set charger current 1125 * @di: pointer to the ab8500_charger structure 1126 * @ich: charger current, in mA 1127 * @reg: select what charger register to set 1128 * 1129 * Set charger current. 1130 * There is no state machine in the AB to step up/down the charger 1131 * current to avoid dips and spikes on MAIN, VBUS and VBAT when 1132 * charging is started. Instead we need to implement 1133 * this charger current step-up/down here. 1134 * Returns error code in case of failure else 0(on success) 1135 */ 1136 static int ab8500_charger_set_current(struct ab8500_charger *di, 1137 int ich, int reg) 1138 { 1139 int ret = 0; 1140 int curr_index, prev_curr_index, shift_value, i; 1141 u8 reg_value; 1142 u32 step_udelay; 1143 bool no_stepping = false; 1144 1145 atomic_inc(&di->current_stepping_sessions); 1146 1147 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 1148 reg, ®_value); 1149 if (ret < 0) { 1150 dev_err(di->dev, "%s read failed\n", __func__); 1151 goto exit_set_current; 1152 } 1153 1154 switch (reg) { 1155 case AB8500_MCH_IPT_CURLVL_REG: 1156 shift_value = MAIN_CH_INPUT_CURR_SHIFT; 1157 prev_curr_index = (reg_value >> shift_value); 1158 curr_index = ab8500_current_to_regval(di, ich); 1159 step_udelay = STEP_UDELAY; 1160 if (!di->ac.charger_connected) 1161 no_stepping = true; 1162 break; 1163 case AB8500_USBCH_IPT_CRNTLVL_REG: 1164 shift_value = VBUS_IN_CURR_LIM_SHIFT; 1165 prev_curr_index = (reg_value >> shift_value); 1166 curr_index = ab8500_vbus_in_curr_to_regval(di, ich); 1167 step_udelay = STEP_UDELAY * 100; 1168 1169 if (!di->usb.charger_connected) 1170 no_stepping = true; 1171 break; 1172 case AB8500_CH_OPT_CRNTLVL_REG: 1173 shift_value = 0; 1174 prev_curr_index = (reg_value >> shift_value); 1175 curr_index = ab8500_current_to_regval(di, ich); 1176 step_udelay = STEP_UDELAY; 1177 if (curr_index && (curr_index - prev_curr_index) > 1) 1178 step_udelay *= 100; 1179 1180 if (!di->usb.charger_connected && !di->ac.charger_connected) 1181 no_stepping = true; 1182 1183 break; 1184 default: 1185 dev_err(di->dev, "%s current register not valid\n", __func__); 1186 ret = -ENXIO; 1187 goto exit_set_current; 1188 } 1189 1190 if (curr_index < 0) { 1191 dev_err(di->dev, "requested current limit out-of-range\n"); 1192 ret = -ENXIO; 1193 goto exit_set_current; 1194 } 1195 1196 /* only update current if it's been changed */ 1197 if (prev_curr_index == curr_index) { 1198 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n", 1199 __func__, reg); 1200 ret = 0; 1201 goto exit_set_current; 1202 } 1203 1204 dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n", 1205 __func__, ich, reg); 1206 1207 if (no_stepping) { 1208 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1209 reg, (u8)curr_index << shift_value); 1210 if (ret) 1211 dev_err(di->dev, "%s write failed\n", __func__); 1212 } else if (prev_curr_index > curr_index) { 1213 for (i = prev_curr_index - 1; i >= curr_index; i--) { 1214 dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n", 1215 (u8) i << shift_value, reg); 1216 ret = abx500_set_register_interruptible(di->dev, 1217 AB8500_CHARGER, reg, (u8)i << shift_value); 1218 if (ret) { 1219 dev_err(di->dev, "%s write failed\n", __func__); 1220 goto exit_set_current; 1221 } 1222 if (i != curr_index) 1223 usleep_range(step_udelay, step_udelay * 2); 1224 } 1225 } else { 1226 bool allow = true; 1227 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) { 1228 dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n", 1229 (u8)i << shift_value, reg); 1230 ret = abx500_set_register_interruptible(di->dev, 1231 AB8500_CHARGER, reg, (u8)i << shift_value); 1232 if (ret) { 1233 dev_err(di->dev, "%s write failed\n", __func__); 1234 goto exit_set_current; 1235 } 1236 if (i != curr_index) 1237 usleep_range(step_udelay, step_udelay * 2); 1238 1239 allow = ab8500_charger_check_continue_stepping(di, reg); 1240 } 1241 } 1242 1243 exit_set_current: 1244 atomic_dec(&di->current_stepping_sessions); 1245 1246 return ret; 1247 } 1248 1249 /** 1250 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit 1251 * @di: pointer to the ab8500_charger structure 1252 * @ich_in: charger input current limit 1253 * 1254 * Sets the current that can be drawn from the USB host 1255 * Returns error code in case of failure else 0(on success) 1256 */ 1257 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di, 1258 int ich_in) 1259 { 1260 int min_value; 1261 int ret; 1262 1263 /* We should always use to lowest current limit */ 1264 min_value = min(di->bm->chg_params->usb_curr_max, ich_in); 1265 if (di->max_usb_in_curr.set_max > 0) 1266 min_value = min(di->max_usb_in_curr.set_max, min_value); 1267 1268 if (di->usb_state.usb_current >= 0) 1269 min_value = min(di->usb_state.usb_current, min_value); 1270 1271 switch (min_value) { 1272 case 100: 1273 if (di->vbat < VBAT_TRESH_IP_CUR_RED) 1274 min_value = USB_CH_IP_CUR_LVL_0P05; 1275 break; 1276 case 500: 1277 if (di->vbat < VBAT_TRESH_IP_CUR_RED) 1278 min_value = USB_CH_IP_CUR_LVL_0P45; 1279 break; 1280 default: 1281 break; 1282 } 1283 1284 dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value); 1285 1286 mutex_lock(&di->usb_ipt_crnt_lock); 1287 ret = ab8500_charger_set_current(di, min_value, 1288 AB8500_USBCH_IPT_CRNTLVL_REG); 1289 mutex_unlock(&di->usb_ipt_crnt_lock); 1290 1291 return ret; 1292 } 1293 1294 /** 1295 * ab8500_charger_set_main_in_curr() - set main charger input current 1296 * @di: pointer to the ab8500_charger structure 1297 * @ich_in: input charger current, in mA 1298 * 1299 * Set main charger input current. 1300 * Returns error code in case of failure else 0(on success) 1301 */ 1302 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di, 1303 int ich_in) 1304 { 1305 return ab8500_charger_set_current(di, ich_in, 1306 AB8500_MCH_IPT_CURLVL_REG); 1307 } 1308 1309 /** 1310 * ab8500_charger_set_output_curr() - set charger output current 1311 * @di: pointer to the ab8500_charger structure 1312 * @ich_out: output charger current, in mA 1313 * 1314 * Set charger output current. 1315 * Returns error code in case of failure else 0(on success) 1316 */ 1317 static int ab8500_charger_set_output_curr(struct ab8500_charger *di, 1318 int ich_out) 1319 { 1320 return ab8500_charger_set_current(di, ich_out, 1321 AB8500_CH_OPT_CRNTLVL_REG); 1322 } 1323 1324 /** 1325 * ab8500_charger_led_en() - turn on/off chargign led 1326 * @di: pointer to the ab8500_charger structure 1327 * @on: flag to turn on/off the chargign led 1328 * 1329 * Power ON/OFF charging LED indication 1330 * Returns error code in case of failure else 0(on success) 1331 */ 1332 static int ab8500_charger_led_en(struct ab8500_charger *di, int on) 1333 { 1334 int ret; 1335 1336 if (on) { 1337 /* Power ON charging LED indicator, set LED current to 5mA */ 1338 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1339 AB8500_LED_INDICATOR_PWM_CTRL, 1340 (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA)); 1341 if (ret) { 1342 dev_err(di->dev, "Power ON LED failed\n"); 1343 return ret; 1344 } 1345 /* LED indicator PWM duty cycle 252/256 */ 1346 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1347 AB8500_LED_INDICATOR_PWM_DUTY, 1348 LED_INDICATOR_PWM_DUTY_252_256); 1349 if (ret) { 1350 dev_err(di->dev, "Set LED PWM duty cycle failed\n"); 1351 return ret; 1352 } 1353 } else { 1354 /* Power off charging LED indicator */ 1355 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1356 AB8500_LED_INDICATOR_PWM_CTRL, 1357 LED_INDICATOR_PWM_DIS); 1358 if (ret) { 1359 dev_err(di->dev, "Power-off LED failed\n"); 1360 return ret; 1361 } 1362 } 1363 1364 return ret; 1365 } 1366 1367 /** 1368 * ab8500_charger_ac_en() - enable or disable ac charging 1369 * @di: pointer to the ab8500_charger structure 1370 * @enable: enable/disable flag 1371 * @vset: charging voltage 1372 * @iset: charging current 1373 * 1374 * Enable/Disable AC/Mains charging and turns on/off the charging led 1375 * respectively. 1376 **/ 1377 static int ab8500_charger_ac_en(struct ux500_charger *charger, 1378 int enable, int vset, int iset) 1379 { 1380 int ret; 1381 int volt_index; 1382 int curr_index; 1383 int input_curr_index; 1384 u8 overshoot = 0; 1385 1386 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); 1387 1388 if (enable) { 1389 /* Check if AC is connected */ 1390 if (!di->ac.charger_connected) { 1391 dev_err(di->dev, "AC charger not connected\n"); 1392 return -ENXIO; 1393 } 1394 1395 /* Enable AC charging */ 1396 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset); 1397 1398 /* 1399 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts 1400 * will be triggered every time we enable the VDD ADC supply. 1401 * This will turn off charging for a short while. 1402 * It can be avoided by having the supply on when 1403 * there is a charger enabled. Normally the VDD ADC supply 1404 * is enabled every time a GPADC conversion is triggered. 1405 * We will force it to be enabled from this driver to have 1406 * the GPADC module independent of the AB8500 chargers 1407 */ 1408 if (!di->vddadc_en_ac) { 1409 ret = regulator_enable(di->regu); 1410 if (ret) 1411 dev_warn(di->dev, 1412 "Failed to enable regulator\n"); 1413 else 1414 di->vddadc_en_ac = true; 1415 } 1416 1417 /* Check if the requested voltage or current is valid */ 1418 volt_index = ab8500_voltage_to_regval(vset); 1419 curr_index = ab8500_current_to_regval(di, iset); 1420 input_curr_index = ab8500_current_to_regval(di, 1421 di->bm->chg_params->ac_curr_max); 1422 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) { 1423 dev_err(di->dev, 1424 "Charger voltage or current too high, " 1425 "charging not started\n"); 1426 return -ENXIO; 1427 } 1428 1429 /* ChVoltLevel: maximum battery charging voltage */ 1430 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1431 AB8500_CH_VOLT_LVL_REG, (u8) volt_index); 1432 if (ret) { 1433 dev_err(di->dev, "%s write failed\n", __func__); 1434 return ret; 1435 } 1436 /* MainChInputCurr: current that can be drawn from the charger*/ 1437 ret = ab8500_charger_set_main_in_curr(di, 1438 di->bm->chg_params->ac_curr_max); 1439 if (ret) { 1440 dev_err(di->dev, "%s Failed to set MainChInputCurr\n", 1441 __func__); 1442 return ret; 1443 } 1444 /* ChOutputCurentLevel: protected output current */ 1445 ret = ab8500_charger_set_output_curr(di, iset); 1446 if (ret) { 1447 dev_err(di->dev, "%s " 1448 "Failed to set ChOutputCurentLevel\n", 1449 __func__); 1450 return ret; 1451 } 1452 1453 /* Check if VBAT overshoot control should be enabled */ 1454 if (!di->bm->enable_overshoot) 1455 overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N; 1456 1457 /* Enable Main Charger */ 1458 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1459 AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot); 1460 if (ret) { 1461 dev_err(di->dev, "%s write failed\n", __func__); 1462 return ret; 1463 } 1464 1465 /* Power on charging LED indication */ 1466 ret = ab8500_charger_led_en(di, true); 1467 if (ret < 0) 1468 dev_err(di->dev, "failed to enable LED\n"); 1469 1470 di->ac.charger_online = 1; 1471 } else { 1472 /* Disable AC charging */ 1473 if (is_ab8500_1p1_or_earlier(di->parent)) { 1474 /* 1475 * For ABB revision 1.0 and 1.1 there is a bug in the 1476 * watchdog logic. That means we have to continuously 1477 * kick the charger watchdog even when no charger is 1478 * connected. This is only valid once the AC charger 1479 * has been enabled. This is a bug that is not handled 1480 * by the algorithm and the watchdog have to be kicked 1481 * by the charger driver when the AC charger 1482 * is disabled 1483 */ 1484 if (di->ac_conn) { 1485 queue_delayed_work(di->charger_wq, 1486 &di->kick_wd_work, 1487 round_jiffies(WD_KICK_INTERVAL)); 1488 } 1489 1490 /* 1491 * We can't turn off charging completely 1492 * due to a bug in AB8500 cut1. 1493 * If we do, charging will not start again. 1494 * That is why we set the lowest voltage 1495 * and current possible 1496 */ 1497 ret = abx500_set_register_interruptible(di->dev, 1498 AB8500_CHARGER, 1499 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5); 1500 if (ret) { 1501 dev_err(di->dev, 1502 "%s write failed\n", __func__); 1503 return ret; 1504 } 1505 1506 ret = ab8500_charger_set_output_curr(di, 0); 1507 if (ret) { 1508 dev_err(di->dev, "%s " 1509 "Failed to set ChOutputCurentLevel\n", 1510 __func__); 1511 return ret; 1512 } 1513 } else { 1514 ret = abx500_set_register_interruptible(di->dev, 1515 AB8500_CHARGER, 1516 AB8500_MCH_CTRL1, 0); 1517 if (ret) { 1518 dev_err(di->dev, 1519 "%s write failed\n", __func__); 1520 return ret; 1521 } 1522 } 1523 1524 ret = ab8500_charger_led_en(di, false); 1525 if (ret < 0) 1526 dev_err(di->dev, "failed to disable LED\n"); 1527 1528 di->ac.charger_online = 0; 1529 di->ac.wd_expired = false; 1530 1531 /* Disable regulator if enabled */ 1532 if (di->vddadc_en_ac) { 1533 regulator_disable(di->regu); 1534 di->vddadc_en_ac = false; 1535 } 1536 1537 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__); 1538 } 1539 ab8500_power_supply_changed(di, di->ac_chg.psy); 1540 1541 return ret; 1542 } 1543 1544 /** 1545 * ab8500_charger_usb_en() - enable usb charging 1546 * @di: pointer to the ab8500_charger structure 1547 * @enable: enable/disable flag 1548 * @vset: charging voltage 1549 * @ich_out: charger output current 1550 * 1551 * Enable/Disable USB charging and turns on/off the charging led respectively. 1552 * Returns error code in case of failure else 0(on success) 1553 */ 1554 static int ab8500_charger_usb_en(struct ux500_charger *charger, 1555 int enable, int vset, int ich_out) 1556 { 1557 int ret; 1558 int volt_index; 1559 int curr_index; 1560 u8 overshoot = 0; 1561 1562 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); 1563 1564 if (enable) { 1565 /* Check if USB is connected */ 1566 if (!di->usb.charger_connected) { 1567 dev_err(di->dev, "USB charger not connected\n"); 1568 return -ENXIO; 1569 } 1570 1571 /* 1572 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts 1573 * will be triggered every time we enable the VDD ADC supply. 1574 * This will turn off charging for a short while. 1575 * It can be avoided by having the supply on when 1576 * there is a charger enabled. Normally the VDD ADC supply 1577 * is enabled every time a GPADC conversion is triggered. 1578 * We will force it to be enabled from this driver to have 1579 * the GPADC module independent of the AB8500 chargers 1580 */ 1581 if (!di->vddadc_en_usb) { 1582 ret = regulator_enable(di->regu); 1583 if (ret) 1584 dev_warn(di->dev, 1585 "Failed to enable regulator\n"); 1586 else 1587 di->vddadc_en_usb = true; 1588 } 1589 1590 /* Enable USB charging */ 1591 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); 1592 1593 /* Check if the requested voltage or current is valid */ 1594 volt_index = ab8500_voltage_to_regval(vset); 1595 curr_index = ab8500_current_to_regval(di, ich_out); 1596 if (volt_index < 0 || curr_index < 0) { 1597 dev_err(di->dev, 1598 "Charger voltage or current too high, " 1599 "charging not started\n"); 1600 return -ENXIO; 1601 } 1602 1603 /* 1604 * ChVoltLevel: max voltage up to which battery can be 1605 * charged 1606 */ 1607 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1608 AB8500_CH_VOLT_LVL_REG, (u8) volt_index); 1609 if (ret) { 1610 dev_err(di->dev, "%s write failed\n", __func__); 1611 return ret; 1612 } 1613 /* Check if VBAT overshoot control should be enabled */ 1614 if (!di->bm->enable_overshoot) 1615 overshoot = USB_CHG_NO_OVERSHOOT_ENA_N; 1616 1617 /* Enable USB Charger */ 1618 dev_dbg(di->dev, 1619 "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n"); 1620 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1621 AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot); 1622 if (ret) { 1623 dev_err(di->dev, "%s write failed\n", __func__); 1624 return ret; 1625 } 1626 1627 /* If success power on charging LED indication */ 1628 ret = ab8500_charger_led_en(di, true); 1629 if (ret < 0) 1630 dev_err(di->dev, "failed to enable LED\n"); 1631 1632 di->usb.charger_online = 1; 1633 1634 /* USBChInputCurr: current that can be drawn from the usb */ 1635 ret = ab8500_charger_set_vbus_in_curr(di, 1636 di->max_usb_in_curr.usb_type_max); 1637 if (ret) { 1638 dev_err(di->dev, "setting USBChInputCurr failed\n"); 1639 return ret; 1640 } 1641 1642 /* ChOutputCurentLevel: protected output current */ 1643 ret = ab8500_charger_set_output_curr(di, ich_out); 1644 if (ret) { 1645 dev_err(di->dev, "%s " 1646 "Failed to set ChOutputCurentLevel\n", 1647 __func__); 1648 return ret; 1649 } 1650 1651 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ); 1652 1653 } else { 1654 /* Disable USB charging */ 1655 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); 1656 ret = abx500_set_register_interruptible(di->dev, 1657 AB8500_CHARGER, 1658 AB8500_USBCH_CTRL1_REG, 0); 1659 if (ret) { 1660 dev_err(di->dev, 1661 "%s write failed\n", __func__); 1662 return ret; 1663 } 1664 1665 ret = ab8500_charger_led_en(di, false); 1666 if (ret < 0) 1667 dev_err(di->dev, "failed to disable LED\n"); 1668 /* USBChInputCurr: current that can be drawn from the usb */ 1669 ret = ab8500_charger_set_vbus_in_curr(di, 0); 1670 if (ret) { 1671 dev_err(di->dev, "setting USBChInputCurr failed\n"); 1672 return ret; 1673 } 1674 1675 /* ChOutputCurentLevel: protected output current */ 1676 ret = ab8500_charger_set_output_curr(di, 0); 1677 if (ret) { 1678 dev_err(di->dev, "%s " 1679 "Failed to reset ChOutputCurentLevel\n", 1680 __func__); 1681 return ret; 1682 } 1683 di->usb.charger_online = 0; 1684 di->usb.wd_expired = false; 1685 1686 /* Disable regulator if enabled */ 1687 if (di->vddadc_en_usb) { 1688 regulator_disable(di->regu); 1689 di->vddadc_en_usb = false; 1690 } 1691 1692 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); 1693 1694 /* Cancel any pending Vbat check work */ 1695 cancel_delayed_work(&di->check_vbat_work); 1696 1697 } 1698 ab8500_power_supply_changed(di, di->usb_chg.psy); 1699 1700 return ret; 1701 } 1702 1703 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb, 1704 unsigned long event, void *data) 1705 { 1706 int ret; 1707 struct device *dev = data; 1708 /*Toggle External charger control pin*/ 1709 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, 1710 AB8500_SYS_CHARGER_CONTROL_REG, 1711 EXTERNAL_CHARGER_DISABLE_REG_VAL); 1712 if (ret < 0) { 1713 dev_err(dev, "write reg failed %d\n", ret); 1714 goto out; 1715 } 1716 ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK, 1717 AB8500_SYS_CHARGER_CONTROL_REG, 1718 EXTERNAL_CHARGER_ENABLE_REG_VAL); 1719 if (ret < 0) 1720 dev_err(dev, "Write reg failed %d\n", ret); 1721 1722 out: 1723 return ret; 1724 } 1725 1726 /** 1727 * ab8500_charger_usb_check_enable() - enable usb charging 1728 * @charger: pointer to the ux500_charger structure 1729 * @vset: charging voltage 1730 * @iset: charger output current 1731 * 1732 * Check if the VBUS charger has been disconnected and reconnected without 1733 * AB8500 rising an interrupt. Returns 0 on success. 1734 */ 1735 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger, 1736 int vset, int iset) 1737 { 1738 u8 usbch_ctrl1 = 0; 1739 int ret = 0; 1740 1741 struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger); 1742 1743 if (!di->usb.charger_connected) 1744 return ret; 1745 1746 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 1747 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1); 1748 if (ret < 0) { 1749 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); 1750 return ret; 1751 } 1752 dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1); 1753 1754 if (!(usbch_ctrl1 & USB_CH_ENA)) { 1755 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); 1756 1757 ret = abx500_mask_and_set_register_interruptible(di->dev, 1758 AB8500_CHARGER, AB8500_CHARGER_CTRL, 1759 DROP_COUNT_RESET, DROP_COUNT_RESET); 1760 if (ret < 0) { 1761 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); 1762 return ret; 1763 } 1764 1765 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset); 1766 if (ret < 0) { 1767 dev_err(di->dev, "Failed to enable VBUS charger %d\n", 1768 __LINE__); 1769 return ret; 1770 } 1771 } 1772 return ret; 1773 } 1774 1775 /** 1776 * ab8500_charger_ac_check_enable() - enable usb charging 1777 * @charger: pointer to the ux500_charger structure 1778 * @vset: charging voltage 1779 * @iset: charger output current 1780 * 1781 * Check if the AC charger has been disconnected and reconnected without 1782 * AB8500 rising an interrupt. Returns 0 on success. 1783 */ 1784 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger, 1785 int vset, int iset) 1786 { 1787 u8 mainch_ctrl1 = 0; 1788 int ret = 0; 1789 1790 struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger); 1791 1792 if (!di->ac.charger_connected) 1793 return ret; 1794 1795 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 1796 AB8500_MCH_CTRL1, &mainch_ctrl1); 1797 if (ret < 0) { 1798 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); 1799 return ret; 1800 } 1801 dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1); 1802 1803 if (!(mainch_ctrl1 & MAIN_CH_ENA)) { 1804 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n"); 1805 1806 ret = abx500_mask_and_set_register_interruptible(di->dev, 1807 AB8500_CHARGER, AB8500_CHARGER_CTRL, 1808 DROP_COUNT_RESET, DROP_COUNT_RESET); 1809 1810 if (ret < 0) { 1811 dev_err(di->dev, "ab8500 write failed %d\n", __LINE__); 1812 return ret; 1813 } 1814 1815 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset); 1816 if (ret < 0) { 1817 dev_err(di->dev, "failed to enable AC charger %d\n", 1818 __LINE__); 1819 return ret; 1820 } 1821 } 1822 return ret; 1823 } 1824 1825 /** 1826 * ab8500_charger_watchdog_kick() - kick charger watchdog 1827 * @di: pointer to the ab8500_charger structure 1828 * 1829 * Kick charger watchdog 1830 * Returns error code in case of failure else 0(on success) 1831 */ 1832 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger) 1833 { 1834 int ret; 1835 struct ab8500_charger *di; 1836 1837 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) 1838 di = to_ab8500_charger_ac_device_info(charger); 1839 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) 1840 di = to_ab8500_charger_usb_device_info(charger); 1841 else 1842 return -ENXIO; 1843 1844 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1845 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); 1846 if (ret) 1847 dev_err(di->dev, "Failed to kick WD!\n"); 1848 1849 return ret; 1850 } 1851 1852 /** 1853 * ab8500_charger_update_charger_current() - update charger current 1854 * @di: pointer to the ab8500_charger structure 1855 * 1856 * Update the charger output current for the specified charger 1857 * Returns error code in case of failure else 0(on success) 1858 */ 1859 static int ab8500_charger_update_charger_current(struct ux500_charger *charger, 1860 int ich_out) 1861 { 1862 int ret; 1863 struct ab8500_charger *di; 1864 1865 if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS) 1866 di = to_ab8500_charger_ac_device_info(charger); 1867 else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB) 1868 di = to_ab8500_charger_usb_device_info(charger); 1869 else 1870 return -ENXIO; 1871 1872 ret = ab8500_charger_set_output_curr(di, ich_out); 1873 if (ret) { 1874 dev_err(di->dev, "%s " 1875 "Failed to set ChOutputCurentLevel\n", 1876 __func__); 1877 return ret; 1878 } 1879 1880 /* Reset the main and usb drop input current measurement counter */ 1881 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 1882 AB8500_CHARGER_CTRL, DROP_COUNT_RESET); 1883 if (ret) { 1884 dev_err(di->dev, "%s write failed\n", __func__); 1885 return ret; 1886 } 1887 1888 return ret; 1889 } 1890 1891 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data) 1892 { 1893 struct power_supply *psy; 1894 struct power_supply *ext = dev_get_drvdata(dev); 1895 const char **supplicants = (const char **)ext->supplied_to; 1896 struct ab8500_charger *di; 1897 union power_supply_propval ret; 1898 int j; 1899 struct ux500_charger *usb_chg; 1900 1901 usb_chg = (struct ux500_charger *)data; 1902 psy = usb_chg->psy; 1903 1904 di = to_ab8500_charger_usb_device_info(usb_chg); 1905 1906 /* For all psy where the driver name appears in any supplied_to */ 1907 j = match_string(supplicants, ext->num_supplicants, psy->desc->name); 1908 if (j < 0) 1909 return 0; 1910 1911 /* Go through all properties for the psy */ 1912 for (j = 0; j < ext->desc->num_properties; j++) { 1913 enum power_supply_property prop; 1914 prop = ext->desc->properties[j]; 1915 1916 if (power_supply_get_property(ext, prop, &ret)) 1917 continue; 1918 1919 switch (prop) { 1920 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 1921 switch (ext->desc->type) { 1922 case POWER_SUPPLY_TYPE_BATTERY: 1923 di->vbat = ret.intval / 1000; 1924 break; 1925 default: 1926 break; 1927 } 1928 break; 1929 default: 1930 break; 1931 } 1932 } 1933 return 0; 1934 } 1935 1936 /** 1937 * ab8500_charger_check_vbat_work() - keep vbus current within spec 1938 * @work pointer to the work_struct structure 1939 * 1940 * Due to a asic bug it is necessary to lower the input current to the vbus 1941 * charger when charging with at some specific levels. This issue is only valid 1942 * for below a certain battery voltage. This function makes sure that the 1943 * the allowed current limit isn't exceeded. 1944 */ 1945 static void ab8500_charger_check_vbat_work(struct work_struct *work) 1946 { 1947 int t = 10; 1948 struct ab8500_charger *di = container_of(work, 1949 struct ab8500_charger, check_vbat_work.work); 1950 1951 class_for_each_device(power_supply_class, NULL, 1952 di->usb_chg.psy, ab8500_charger_get_ext_psy_data); 1953 1954 /* First run old_vbat is 0. */ 1955 if (di->old_vbat == 0) 1956 di->old_vbat = di->vbat; 1957 1958 if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED && 1959 di->vbat <= VBAT_TRESH_IP_CUR_RED) || 1960 (di->old_vbat > VBAT_TRESH_IP_CUR_RED && 1961 di->vbat > VBAT_TRESH_IP_CUR_RED))) { 1962 1963 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d," 1964 " old: %d\n", di->max_usb_in_curr.usb_type_max, 1965 di->vbat, di->old_vbat); 1966 ab8500_charger_set_vbus_in_curr(di, 1967 di->max_usb_in_curr.usb_type_max); 1968 power_supply_changed(di->usb_chg.psy); 1969 } 1970 1971 di->old_vbat = di->vbat; 1972 1973 /* 1974 * No need to check the battery voltage every second when not close to 1975 * the threshold. 1976 */ 1977 if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) && 1978 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100))) 1979 t = 1; 1980 1981 queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ); 1982 } 1983 1984 /** 1985 * ab8500_charger_check_hw_failure_work() - check main charger failure 1986 * @work: pointer to the work_struct structure 1987 * 1988 * Work queue function for checking the main charger status 1989 */ 1990 static void ab8500_charger_check_hw_failure_work(struct work_struct *work) 1991 { 1992 int ret; 1993 u8 reg_value; 1994 1995 struct ab8500_charger *di = container_of(work, 1996 struct ab8500_charger, check_hw_failure_work.work); 1997 1998 /* Check if the status bits for HW failure is still active */ 1999 if (di->flags.mainextchnotok) { 2000 ret = abx500_get_register_interruptible(di->dev, 2001 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); 2002 if (ret < 0) { 2003 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 2004 return; 2005 } 2006 if (!(reg_value & MAIN_CH_NOK)) { 2007 di->flags.mainextchnotok = false; 2008 ab8500_power_supply_changed(di, di->ac_chg.psy); 2009 } 2010 } 2011 if (di->flags.vbus_ovv) { 2012 ret = abx500_get_register_interruptible(di->dev, 2013 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, 2014 ®_value); 2015 if (ret < 0) { 2016 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 2017 return; 2018 } 2019 if (!(reg_value & VBUS_OVV_TH)) { 2020 di->flags.vbus_ovv = false; 2021 ab8500_power_supply_changed(di, di->usb_chg.psy); 2022 } 2023 } 2024 /* If we still have a failure, schedule a new check */ 2025 if (di->flags.mainextchnotok || di->flags.vbus_ovv) { 2026 queue_delayed_work(di->charger_wq, 2027 &di->check_hw_failure_work, round_jiffies(HZ)); 2028 } 2029 } 2030 2031 /** 2032 * ab8500_charger_kick_watchdog_work() - kick the watchdog 2033 * @work: pointer to the work_struct structure 2034 * 2035 * Work queue function for kicking the charger watchdog. 2036 * 2037 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog 2038 * logic. That means we have to continuously kick the charger 2039 * watchdog even when no charger is connected. This is only 2040 * valid once the AC charger has been enabled. This is 2041 * a bug that is not handled by the algorithm and the 2042 * watchdog have to be kicked by the charger driver 2043 * when the AC charger is disabled 2044 */ 2045 static void ab8500_charger_kick_watchdog_work(struct work_struct *work) 2046 { 2047 int ret; 2048 2049 struct ab8500_charger *di = container_of(work, 2050 struct ab8500_charger, kick_wd_work.work); 2051 2052 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 2053 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); 2054 if (ret) 2055 dev_err(di->dev, "Failed to kick WD!\n"); 2056 2057 /* Schedule a new watchdog kick */ 2058 queue_delayed_work(di->charger_wq, 2059 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL)); 2060 } 2061 2062 /** 2063 * ab8500_charger_ac_work() - work to get and set main charger status 2064 * @work: pointer to the work_struct structure 2065 * 2066 * Work queue function for checking the main charger status 2067 */ 2068 static void ab8500_charger_ac_work(struct work_struct *work) 2069 { 2070 int ret; 2071 2072 struct ab8500_charger *di = container_of(work, 2073 struct ab8500_charger, ac_work); 2074 2075 /* 2076 * Since we can't be sure that the events are received 2077 * synchronously, we have the check if the main charger is 2078 * connected by reading the status register 2079 */ 2080 ret = ab8500_charger_detect_chargers(di, false); 2081 if (ret < 0) 2082 return; 2083 2084 if (ret & AC_PW_CONN) { 2085 di->ac.charger_connected = 1; 2086 di->ac_conn = true; 2087 } else { 2088 di->ac.charger_connected = 0; 2089 } 2090 2091 ab8500_power_supply_changed(di, di->ac_chg.psy); 2092 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); 2093 } 2094 2095 static void ab8500_charger_usb_attached_work(struct work_struct *work) 2096 { 2097 struct ab8500_charger *di = container_of(work, 2098 struct ab8500_charger, 2099 usb_charger_attached_work.work); 2100 int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC); 2101 int ret, i; 2102 u8 statval; 2103 2104 for (i = 0; i < 10; i++) { 2105 ret = abx500_get_register_interruptible(di->dev, 2106 AB8500_CHARGER, 2107 AB8500_CH_USBCH_STAT1_REG, 2108 &statval); 2109 if (ret < 0) { 2110 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); 2111 goto reschedule; 2112 } 2113 if ((statval & usbch) != usbch) 2114 goto reschedule; 2115 2116 msleep(CHARGER_STATUS_POLL); 2117 } 2118 2119 ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0); 2120 2121 mutex_lock(&di->charger_attached_mutex); 2122 mutex_unlock(&di->charger_attached_mutex); 2123 2124 return; 2125 2126 reschedule: 2127 queue_delayed_work(di->charger_wq, 2128 &di->usb_charger_attached_work, 2129 HZ); 2130 } 2131 2132 static void ab8500_charger_ac_attached_work(struct work_struct *work) 2133 { 2134 2135 struct ab8500_charger *di = container_of(work, 2136 struct ab8500_charger, 2137 ac_charger_attached_work.work); 2138 int mainch = (MAIN_CH_STATUS2_MAINCHGDROP | 2139 MAIN_CH_STATUS2_MAINCHARGERDETDBNC); 2140 int ret, i; 2141 u8 statval; 2142 2143 for (i = 0; i < 10; i++) { 2144 ret = abx500_get_register_interruptible(di->dev, 2145 AB8500_CHARGER, 2146 AB8500_CH_STATUS2_REG, 2147 &statval); 2148 if (ret < 0) { 2149 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__); 2150 goto reschedule; 2151 } 2152 2153 if ((statval & mainch) != mainch) 2154 goto reschedule; 2155 2156 msleep(CHARGER_STATUS_POLL); 2157 } 2158 2159 ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0); 2160 queue_work(di->charger_wq, &di->ac_work); 2161 2162 mutex_lock(&di->charger_attached_mutex); 2163 mutex_unlock(&di->charger_attached_mutex); 2164 2165 return; 2166 2167 reschedule: 2168 queue_delayed_work(di->charger_wq, 2169 &di->ac_charger_attached_work, 2170 HZ); 2171 } 2172 2173 /** 2174 * ab8500_charger_detect_usb_type_work() - work to detect USB type 2175 * @work: Pointer to the work_struct structure 2176 * 2177 * Detect the type of USB plugged 2178 */ 2179 static void ab8500_charger_detect_usb_type_work(struct work_struct *work) 2180 { 2181 int ret; 2182 2183 struct ab8500_charger *di = container_of(work, 2184 struct ab8500_charger, detect_usb_type_work); 2185 2186 /* 2187 * Since we can't be sure that the events are received 2188 * synchronously, we have the check if is 2189 * connected by reading the status register 2190 */ 2191 ret = ab8500_charger_detect_chargers(di, false); 2192 if (ret < 0) 2193 return; 2194 2195 if (!(ret & USB_PW_CONN)) { 2196 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__); 2197 di->vbus_detected = false; 2198 ab8500_charger_set_usb_connected(di, false); 2199 ab8500_power_supply_changed(di, di->usb_chg.psy); 2200 } else { 2201 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__); 2202 di->vbus_detected = true; 2203 2204 if (is_ab8500_1p1_or_earlier(di->parent)) { 2205 ret = ab8500_charger_detect_usb_type(di); 2206 if (!ret) { 2207 ab8500_charger_set_usb_connected(di, true); 2208 ab8500_power_supply_changed(di, 2209 di->usb_chg.psy); 2210 } 2211 } else { 2212 /* 2213 * For ABB cut2.0 and onwards we have an IRQ, 2214 * USB_LINK_STATUS that will be triggered when the USB 2215 * link status changes. The exception is USB connected 2216 * during startup. Then we don't get a 2217 * USB_LINK_STATUS IRQ 2218 */ 2219 if (di->vbus_detected_start) { 2220 di->vbus_detected_start = false; 2221 ret = ab8500_charger_detect_usb_type(di); 2222 if (!ret) { 2223 ab8500_charger_set_usb_connected(di, 2224 true); 2225 ab8500_power_supply_changed(di, 2226 di->usb_chg.psy); 2227 } 2228 } 2229 } 2230 } 2231 } 2232 2233 /** 2234 * ab8500_charger_usb_link_attach_work() - work to detect USB type 2235 * @work: pointer to the work_struct structure 2236 * 2237 * Detect the type of USB plugged 2238 */ 2239 static void ab8500_charger_usb_link_attach_work(struct work_struct *work) 2240 { 2241 struct ab8500_charger *di = 2242 container_of(work, struct ab8500_charger, attach_work.work); 2243 int ret; 2244 2245 /* Update maximum input current if USB enumeration is not detected */ 2246 if (!di->usb.charger_online) { 2247 ret = ab8500_charger_set_vbus_in_curr(di, 2248 di->max_usb_in_curr.usb_type_max); 2249 if (ret) 2250 return; 2251 } 2252 2253 ab8500_charger_set_usb_connected(di, true); 2254 ab8500_power_supply_changed(di, di->usb_chg.psy); 2255 } 2256 2257 /** 2258 * ab8500_charger_usb_link_status_work() - work to detect USB type 2259 * @work: pointer to the work_struct structure 2260 * 2261 * Detect the type of USB plugged 2262 */ 2263 static void ab8500_charger_usb_link_status_work(struct work_struct *work) 2264 { 2265 int detected_chargers; 2266 int ret; 2267 u8 val; 2268 u8 link_status; 2269 2270 struct ab8500_charger *di = container_of(work, 2271 struct ab8500_charger, usb_link_status_work); 2272 2273 /* 2274 * Since we can't be sure that the events are received 2275 * synchronously, we have the check if is 2276 * connected by reading the status register 2277 */ 2278 detected_chargers = ab8500_charger_detect_chargers(di, false); 2279 if (detected_chargers < 0) 2280 return; 2281 2282 /* 2283 * Some chargers that breaks the USB spec is 2284 * identified as invalid by AB8500 and it refuse 2285 * to start the charging process. but by jumping 2286 * through a few hoops it can be forced to start. 2287 */ 2288 if (is_ab8500(di->parent)) 2289 ret = abx500_get_register_interruptible(di->dev, AB8500_USB, 2290 AB8500_USB_LINE_STAT_REG, &val); 2291 else 2292 ret = abx500_get_register_interruptible(di->dev, AB8500_USB, 2293 AB8500_USB_LINK1_STAT_REG, &val); 2294 2295 if (ret >= 0) 2296 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val); 2297 else 2298 dev_dbg(di->dev, "Error reading USB link status\n"); 2299 2300 if (is_ab8500(di->parent)) 2301 link_status = AB8500_USB_LINK_STATUS; 2302 else 2303 link_status = AB8505_USB_LINK_STATUS; 2304 2305 if (detected_chargers & USB_PW_CONN) { 2306 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) == 2307 USB_STAT_NOT_VALID_LINK && 2308 di->invalid_charger_detect_state == 0) { 2309 dev_dbg(di->dev, 2310 "Invalid charger detected, state= 0\n"); 2311 /*Enable charger*/ 2312 abx500_mask_and_set_register_interruptible(di->dev, 2313 AB8500_CHARGER, AB8500_USBCH_CTRL1_REG, 2314 USB_CH_ENA, USB_CH_ENA); 2315 /*Enable charger detection*/ 2316 abx500_mask_and_set_register_interruptible(di->dev, 2317 AB8500_USB, AB8500_USB_LINE_CTRL2_REG, 2318 USB_CH_DET, USB_CH_DET); 2319 di->invalid_charger_detect_state = 1; 2320 /*exit and wait for new link status interrupt.*/ 2321 return; 2322 2323 } 2324 if (di->invalid_charger_detect_state == 1) { 2325 dev_dbg(di->dev, 2326 "Invalid charger detected, state= 1\n"); 2327 /*Stop charger detection*/ 2328 abx500_mask_and_set_register_interruptible(di->dev, 2329 AB8500_USB, AB8500_USB_LINE_CTRL2_REG, 2330 USB_CH_DET, 0x00); 2331 /*Check link status*/ 2332 if (is_ab8500(di->parent)) 2333 ret = abx500_get_register_interruptible(di->dev, 2334 AB8500_USB, AB8500_USB_LINE_STAT_REG, 2335 &val); 2336 else 2337 ret = abx500_get_register_interruptible(di->dev, 2338 AB8500_USB, AB8500_USB_LINK1_STAT_REG, 2339 &val); 2340 2341 dev_dbg(di->dev, "USB link status= 0x%02x\n", 2342 (val & link_status) >> USB_LINK_STATUS_SHIFT); 2343 di->invalid_charger_detect_state = 2; 2344 } 2345 } else { 2346 di->invalid_charger_detect_state = 0; 2347 } 2348 2349 if (!(detected_chargers & USB_PW_CONN)) { 2350 di->vbus_detected = false; 2351 ab8500_charger_set_usb_connected(di, false); 2352 ab8500_power_supply_changed(di, di->usb_chg.psy); 2353 return; 2354 } 2355 2356 dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__); 2357 di->vbus_detected = true; 2358 ret = ab8500_charger_read_usb_type(di); 2359 if (ret) { 2360 if (ret == -ENXIO) { 2361 /* No valid charger type detected */ 2362 ab8500_charger_set_usb_connected(di, false); 2363 ab8500_power_supply_changed(di, di->usb_chg.psy); 2364 } 2365 return; 2366 } 2367 2368 if (di->usb_device_is_unrecognised) { 2369 dev_dbg(di->dev, 2370 "Potential Legacy Charger device. " 2371 "Delay work for %d msec for USB enum " 2372 "to finish", 2373 WAIT_ACA_RID_ENUMERATION); 2374 queue_delayed_work(di->charger_wq, 2375 &di->attach_work, 2376 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); 2377 } else if (di->is_aca_rid == 1) { 2378 /* Only wait once */ 2379 di->is_aca_rid++; 2380 dev_dbg(di->dev, 2381 "%s Wait %d msec for USB enum to finish", 2382 __func__, WAIT_ACA_RID_ENUMERATION); 2383 queue_delayed_work(di->charger_wq, 2384 &di->attach_work, 2385 msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION)); 2386 } else { 2387 queue_delayed_work(di->charger_wq, 2388 &di->attach_work, 2389 0); 2390 } 2391 } 2392 2393 static void ab8500_charger_usb_state_changed_work(struct work_struct *work) 2394 { 2395 int ret; 2396 unsigned long flags; 2397 2398 struct ab8500_charger *di = container_of(work, 2399 struct ab8500_charger, usb_state_changed_work.work); 2400 2401 if (!di->vbus_detected) { 2402 dev_dbg(di->dev, 2403 "%s !di->vbus_detected\n", 2404 __func__); 2405 return; 2406 } 2407 2408 spin_lock_irqsave(&di->usb_state.usb_lock, flags); 2409 di->usb_state.state = di->usb_state.state_tmp; 2410 di->usb_state.usb_current = di->usb_state.usb_current_tmp; 2411 spin_unlock_irqrestore(&di->usb_state.usb_lock, flags); 2412 2413 dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", 2414 __func__, di->usb_state.state, di->usb_state.usb_current); 2415 2416 switch (di->usb_state.state) { 2417 case AB8500_BM_USB_STATE_RESET_HS: 2418 case AB8500_BM_USB_STATE_RESET_FS: 2419 case AB8500_BM_USB_STATE_SUSPEND: 2420 case AB8500_BM_USB_STATE_MAX: 2421 ab8500_charger_set_usb_connected(di, false); 2422 ab8500_power_supply_changed(di, di->usb_chg.psy); 2423 break; 2424 2425 case AB8500_BM_USB_STATE_RESUME: 2426 /* 2427 * when suspend->resume there should be delay 2428 * of 1sec for enabling charging 2429 */ 2430 msleep(1000); 2431 fallthrough; 2432 case AB8500_BM_USB_STATE_CONFIGURED: 2433 /* 2434 * USB is configured, enable charging with the charging 2435 * input current obtained from USB driver 2436 */ 2437 if (!ab8500_charger_get_usb_cur(di)) { 2438 /* Update maximum input current */ 2439 ret = ab8500_charger_set_vbus_in_curr(di, 2440 di->max_usb_in_curr.usb_type_max); 2441 if (ret) 2442 return; 2443 2444 ab8500_charger_set_usb_connected(di, true); 2445 ab8500_power_supply_changed(di, di->usb_chg.psy); 2446 } 2447 break; 2448 2449 default: 2450 break; 2451 } 2452 } 2453 2454 /** 2455 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status 2456 * @work: pointer to the work_struct structure 2457 * 2458 * Work queue function for checking the USB charger Not OK status 2459 */ 2460 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work) 2461 { 2462 int ret; 2463 u8 reg_value; 2464 bool prev_status; 2465 2466 struct ab8500_charger *di = container_of(work, 2467 struct ab8500_charger, check_usbchgnotok_work.work); 2468 2469 /* Check if the status bit for usbchargernotok is still active */ 2470 ret = abx500_get_register_interruptible(di->dev, 2471 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); 2472 if (ret < 0) { 2473 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 2474 return; 2475 } 2476 prev_status = di->flags.usbchargernotok; 2477 2478 if (reg_value & VBUS_CH_NOK) { 2479 di->flags.usbchargernotok = true; 2480 /* Check again in 1sec */ 2481 queue_delayed_work(di->charger_wq, 2482 &di->check_usbchgnotok_work, HZ); 2483 } else { 2484 di->flags.usbchargernotok = false; 2485 di->flags.vbus_collapse = false; 2486 } 2487 2488 if (prev_status != di->flags.usbchargernotok) 2489 ab8500_power_supply_changed(di, di->usb_chg.psy); 2490 } 2491 2492 /** 2493 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status 2494 * @work: pointer to the work_struct structure 2495 * 2496 * Work queue function for checking the Main thermal prot status 2497 */ 2498 static void ab8500_charger_check_main_thermal_prot_work( 2499 struct work_struct *work) 2500 { 2501 int ret; 2502 u8 reg_value; 2503 2504 struct ab8500_charger *di = container_of(work, 2505 struct ab8500_charger, check_main_thermal_prot_work); 2506 2507 /* Check if the status bit for main_thermal_prot is still active */ 2508 ret = abx500_get_register_interruptible(di->dev, 2509 AB8500_CHARGER, AB8500_CH_STATUS2_REG, ®_value); 2510 if (ret < 0) { 2511 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 2512 return; 2513 } 2514 if (reg_value & MAIN_CH_TH_PROT) 2515 di->flags.main_thermal_prot = true; 2516 else 2517 di->flags.main_thermal_prot = false; 2518 2519 ab8500_power_supply_changed(di, di->ac_chg.psy); 2520 } 2521 2522 /** 2523 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status 2524 * @work: pointer to the work_struct structure 2525 * 2526 * Work queue function for checking the USB thermal prot status 2527 */ 2528 static void ab8500_charger_check_usb_thermal_prot_work( 2529 struct work_struct *work) 2530 { 2531 int ret; 2532 u8 reg_value; 2533 2534 struct ab8500_charger *di = container_of(work, 2535 struct ab8500_charger, check_usb_thermal_prot_work); 2536 2537 /* Check if the status bit for usb_thermal_prot is still active */ 2538 ret = abx500_get_register_interruptible(di->dev, 2539 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, ®_value); 2540 if (ret < 0) { 2541 dev_err(di->dev, "%s ab8500 read failed\n", __func__); 2542 return; 2543 } 2544 if (reg_value & USB_CH_TH_PROT) 2545 di->flags.usb_thermal_prot = true; 2546 else 2547 di->flags.usb_thermal_prot = false; 2548 2549 ab8500_power_supply_changed(di, di->usb_chg.psy); 2550 } 2551 2552 /** 2553 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged 2554 * @irq: interrupt number 2555 * @_di: pointer to the ab8500_charger structure 2556 * 2557 * Returns IRQ status(IRQ_HANDLED) 2558 */ 2559 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di) 2560 { 2561 struct ab8500_charger *di = _di; 2562 2563 dev_dbg(di->dev, "Main charger unplugged\n"); 2564 queue_work(di->charger_wq, &di->ac_work); 2565 2566 cancel_delayed_work_sync(&di->ac_charger_attached_work); 2567 mutex_lock(&di->charger_attached_mutex); 2568 mutex_unlock(&di->charger_attached_mutex); 2569 2570 return IRQ_HANDLED; 2571 } 2572 2573 /** 2574 * ab8500_charger_mainchplugdet_handler() - main charger plugged 2575 * @irq: interrupt number 2576 * @_di: pointer to the ab8500_charger structure 2577 * 2578 * Returns IRQ status(IRQ_HANDLED) 2579 */ 2580 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di) 2581 { 2582 struct ab8500_charger *di = _di; 2583 2584 dev_dbg(di->dev, "Main charger plugged\n"); 2585 queue_work(di->charger_wq, &di->ac_work); 2586 2587 mutex_lock(&di->charger_attached_mutex); 2588 mutex_unlock(&di->charger_attached_mutex); 2589 2590 if (is_ab8500(di->parent)) 2591 queue_delayed_work(di->charger_wq, 2592 &di->ac_charger_attached_work, 2593 HZ); 2594 return IRQ_HANDLED; 2595 } 2596 2597 /** 2598 * ab8500_charger_mainextchnotok_handler() - main charger not ok 2599 * @irq: interrupt number 2600 * @_di: pointer to the ab8500_charger structure 2601 * 2602 * Returns IRQ status(IRQ_HANDLED) 2603 */ 2604 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di) 2605 { 2606 struct ab8500_charger *di = _di; 2607 2608 dev_dbg(di->dev, "Main charger not ok\n"); 2609 di->flags.mainextchnotok = true; 2610 ab8500_power_supply_changed(di, di->ac_chg.psy); 2611 2612 /* Schedule a new HW failure check */ 2613 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); 2614 2615 return IRQ_HANDLED; 2616 } 2617 2618 /** 2619 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger 2620 * thermal protection threshold 2621 * @irq: interrupt number 2622 * @_di: pointer to the ab8500_charger structure 2623 * 2624 * Returns IRQ status(IRQ_HANDLED) 2625 */ 2626 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di) 2627 { 2628 struct ab8500_charger *di = _di; 2629 2630 dev_dbg(di->dev, 2631 "Die temp above Main charger thermal protection threshold\n"); 2632 queue_work(di->charger_wq, &di->check_main_thermal_prot_work); 2633 2634 return IRQ_HANDLED; 2635 } 2636 2637 /** 2638 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger 2639 * thermal protection threshold 2640 * @irq: interrupt number 2641 * @_di: pointer to the ab8500_charger structure 2642 * 2643 * Returns IRQ status(IRQ_HANDLED) 2644 */ 2645 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di) 2646 { 2647 struct ab8500_charger *di = _di; 2648 2649 dev_dbg(di->dev, 2650 "Die temp ok for Main charger thermal protection threshold\n"); 2651 queue_work(di->charger_wq, &di->check_main_thermal_prot_work); 2652 2653 return IRQ_HANDLED; 2654 } 2655 2656 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work) 2657 { 2658 struct ab8500_charger *di = container_of(work, 2659 struct ab8500_charger, vbus_drop_end_work.work); 2660 int ret, curr; 2661 u8 reg_value; 2662 2663 di->flags.vbus_drop_end = false; 2664 2665 /* Reset the drop counter */ 2666 abx500_set_register_interruptible(di->dev, 2667 AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01); 2668 2669 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER, 2670 AB8500_CH_USBCH_STAT2_REG, ®_value); 2671 if (ret < 0) { 2672 dev_err(di->dev, "%s read failed\n", __func__); 2673 return; 2674 } 2675 2676 curr = di->bm->chg_input_curr[ 2677 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT]; 2678 2679 if (di->max_usb_in_curr.calculated_max != curr) { 2680 /* USB source is collapsing */ 2681 di->max_usb_in_curr.calculated_max = curr; 2682 dev_dbg(di->dev, 2683 "VBUS input current limiting to %d mA\n", 2684 di->max_usb_in_curr.calculated_max); 2685 } else { 2686 /* 2687 * USB source can not give more than this amount. 2688 * Taking more will collapse the source. 2689 */ 2690 di->max_usb_in_curr.set_max = 2691 di->max_usb_in_curr.calculated_max; 2692 dev_dbg(di->dev, 2693 "VBUS input current limited to %d mA\n", 2694 di->max_usb_in_curr.set_max); 2695 } 2696 2697 if (di->usb.charger_connected) 2698 ab8500_charger_set_vbus_in_curr(di, 2699 di->max_usb_in_curr.usb_type_max); 2700 } 2701 2702 /** 2703 * ab8500_charger_vbusdetf_handler() - VBUS falling detected 2704 * @irq: interrupt number 2705 * @_di: pointer to the ab8500_charger structure 2706 * 2707 * Returns IRQ status(IRQ_HANDLED) 2708 */ 2709 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di) 2710 { 2711 struct ab8500_charger *di = _di; 2712 2713 di->vbus_detected = false; 2714 dev_dbg(di->dev, "VBUS falling detected\n"); 2715 queue_work(di->charger_wq, &di->detect_usb_type_work); 2716 2717 return IRQ_HANDLED; 2718 } 2719 2720 /** 2721 * ab8500_charger_vbusdetr_handler() - VBUS rising detected 2722 * @irq: interrupt number 2723 * @_di: pointer to the ab8500_charger structure 2724 * 2725 * Returns IRQ status(IRQ_HANDLED) 2726 */ 2727 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di) 2728 { 2729 struct ab8500_charger *di = _di; 2730 2731 di->vbus_detected = true; 2732 dev_dbg(di->dev, "VBUS rising detected\n"); 2733 2734 queue_work(di->charger_wq, &di->detect_usb_type_work); 2735 2736 return IRQ_HANDLED; 2737 } 2738 2739 /** 2740 * ab8500_charger_usblinkstatus_handler() - USB link status has changed 2741 * @irq: interrupt number 2742 * @_di: pointer to the ab8500_charger structure 2743 * 2744 * Returns IRQ status(IRQ_HANDLED) 2745 */ 2746 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di) 2747 { 2748 struct ab8500_charger *di = _di; 2749 2750 dev_dbg(di->dev, "USB link status changed\n"); 2751 2752 queue_work(di->charger_wq, &di->usb_link_status_work); 2753 2754 return IRQ_HANDLED; 2755 } 2756 2757 /** 2758 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger 2759 * thermal protection threshold 2760 * @irq: interrupt number 2761 * @_di: pointer to the ab8500_charger structure 2762 * 2763 * Returns IRQ status(IRQ_HANDLED) 2764 */ 2765 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di) 2766 { 2767 struct ab8500_charger *di = _di; 2768 2769 dev_dbg(di->dev, 2770 "Die temp above USB charger thermal protection threshold\n"); 2771 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); 2772 2773 return IRQ_HANDLED; 2774 } 2775 2776 /** 2777 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger 2778 * thermal protection threshold 2779 * @irq: interrupt number 2780 * @_di: pointer to the ab8500_charger structure 2781 * 2782 * Returns IRQ status(IRQ_HANDLED) 2783 */ 2784 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di) 2785 { 2786 struct ab8500_charger *di = _di; 2787 2788 dev_dbg(di->dev, 2789 "Die temp ok for USB charger thermal protection threshold\n"); 2790 queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); 2791 2792 return IRQ_HANDLED; 2793 } 2794 2795 /** 2796 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected 2797 * @irq: interrupt number 2798 * @_di: pointer to the ab8500_charger structure 2799 * 2800 * Returns IRQ status(IRQ_HANDLED) 2801 */ 2802 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di) 2803 { 2804 struct ab8500_charger *di = _di; 2805 2806 dev_dbg(di->dev, "Not allowed USB charger detected\n"); 2807 queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); 2808 2809 return IRQ_HANDLED; 2810 } 2811 2812 /** 2813 * ab8500_charger_chwdexp_handler() - Charger watchdog expired 2814 * @irq: interrupt number 2815 * @_di: pointer to the ab8500_charger structure 2816 * 2817 * Returns IRQ status(IRQ_HANDLED) 2818 */ 2819 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di) 2820 { 2821 struct ab8500_charger *di = _di; 2822 2823 dev_dbg(di->dev, "Charger watchdog expired\n"); 2824 2825 /* 2826 * The charger that was online when the watchdog expired 2827 * needs to be restarted for charging to start again 2828 */ 2829 if (di->ac.charger_online) { 2830 di->ac.wd_expired = true; 2831 ab8500_power_supply_changed(di, di->ac_chg.psy); 2832 } 2833 if (di->usb.charger_online) { 2834 di->usb.wd_expired = true; 2835 ab8500_power_supply_changed(di, di->usb_chg.psy); 2836 } 2837 2838 return IRQ_HANDLED; 2839 } 2840 2841 /** 2842 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed 2843 * @irq: interrupt number 2844 * @_di: pointer to the ab8500_charger structure 2845 * 2846 * Returns IRQ status(IRQ_HANDLED) 2847 */ 2848 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di) 2849 { 2850 struct ab8500_charger *di = _di; 2851 2852 dev_dbg(di->dev, "VBUS charger drop ended\n"); 2853 di->flags.vbus_drop_end = true; 2854 2855 /* 2856 * VBUS might have dropped due to bad connection. 2857 * Schedule a new input limit set to the value SW requests. 2858 */ 2859 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 2860 round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ)); 2861 2862 return IRQ_HANDLED; 2863 } 2864 2865 /** 2866 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected 2867 * @irq: interrupt number 2868 * @_di: pointer to the ab8500_charger structure 2869 * 2870 * Returns IRQ status(IRQ_HANDLED) 2871 */ 2872 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di) 2873 { 2874 struct ab8500_charger *di = _di; 2875 2876 dev_dbg(di->dev, "VBUS overvoltage detected\n"); 2877 di->flags.vbus_ovv = true; 2878 ab8500_power_supply_changed(di, di->usb_chg.psy); 2879 2880 /* Schedule a new HW failure check */ 2881 queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); 2882 2883 return IRQ_HANDLED; 2884 } 2885 2886 /** 2887 * ab8500_charger_ac_get_property() - get the ac/mains properties 2888 * @psy: pointer to the power_supply structure 2889 * @psp: pointer to the power_supply_property structure 2890 * @val: pointer to the power_supply_propval union 2891 * 2892 * This function gets called when an application tries to get the ac/mains 2893 * properties by reading the sysfs files. 2894 * AC/Mains properties are online, present and voltage. 2895 * online: ac/mains charging is in progress or not 2896 * present: presence of the ac/mains 2897 * voltage: AC/Mains voltage 2898 * Returns error code in case of failure else 0(on success) 2899 */ 2900 static int ab8500_charger_ac_get_property(struct power_supply *psy, 2901 enum power_supply_property psp, 2902 union power_supply_propval *val) 2903 { 2904 struct ab8500_charger *di; 2905 int ret; 2906 2907 di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy)); 2908 2909 switch (psp) { 2910 case POWER_SUPPLY_PROP_HEALTH: 2911 if (di->flags.mainextchnotok) 2912 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 2913 else if (di->ac.wd_expired || di->usb.wd_expired) 2914 val->intval = POWER_SUPPLY_HEALTH_DEAD; 2915 else if (di->flags.main_thermal_prot) 2916 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; 2917 else 2918 val->intval = POWER_SUPPLY_HEALTH_GOOD; 2919 break; 2920 case POWER_SUPPLY_PROP_ONLINE: 2921 val->intval = di->ac.charger_online; 2922 break; 2923 case POWER_SUPPLY_PROP_PRESENT: 2924 val->intval = di->ac.charger_connected; 2925 break; 2926 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 2927 ret = ab8500_charger_get_ac_voltage(di); 2928 if (ret >= 0) 2929 di->ac.charger_voltage = ret; 2930 /* On error, use previous value */ 2931 val->intval = di->ac.charger_voltage * 1000; 2932 break; 2933 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 2934 /* 2935 * This property is used to indicate when CV mode is entered 2936 * for the AC charger 2937 */ 2938 di->ac.cv_active = ab8500_charger_ac_cv(di); 2939 val->intval = di->ac.cv_active; 2940 break; 2941 case POWER_SUPPLY_PROP_CURRENT_NOW: 2942 ret = ab8500_charger_get_ac_current(di); 2943 if (ret >= 0) 2944 di->ac.charger_current = ret; 2945 val->intval = di->ac.charger_current * 1000; 2946 break; 2947 default: 2948 return -EINVAL; 2949 } 2950 return 0; 2951 } 2952 2953 /** 2954 * ab8500_charger_usb_get_property() - get the usb properties 2955 * @psy: pointer to the power_supply structure 2956 * @psp: pointer to the power_supply_property structure 2957 * @val: pointer to the power_supply_propval union 2958 * 2959 * This function gets called when an application tries to get the usb 2960 * properties by reading the sysfs files. 2961 * USB properties are online, present and voltage. 2962 * online: usb charging is in progress or not 2963 * present: presence of the usb 2964 * voltage: vbus voltage 2965 * Returns error code in case of failure else 0(on success) 2966 */ 2967 static int ab8500_charger_usb_get_property(struct power_supply *psy, 2968 enum power_supply_property psp, 2969 union power_supply_propval *val) 2970 { 2971 struct ab8500_charger *di; 2972 int ret; 2973 2974 di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy)); 2975 2976 switch (psp) { 2977 case POWER_SUPPLY_PROP_HEALTH: 2978 if (di->flags.usbchargernotok) 2979 val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 2980 else if (di->ac.wd_expired || di->usb.wd_expired) 2981 val->intval = POWER_SUPPLY_HEALTH_DEAD; 2982 else if (di->flags.usb_thermal_prot) 2983 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; 2984 else if (di->flags.vbus_ovv) 2985 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 2986 else 2987 val->intval = POWER_SUPPLY_HEALTH_GOOD; 2988 break; 2989 case POWER_SUPPLY_PROP_ONLINE: 2990 val->intval = di->usb.charger_online; 2991 break; 2992 case POWER_SUPPLY_PROP_PRESENT: 2993 val->intval = di->usb.charger_connected; 2994 break; 2995 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 2996 ret = ab8500_charger_get_vbus_voltage(di); 2997 if (ret >= 0) 2998 di->usb.charger_voltage = ret; 2999 val->intval = di->usb.charger_voltage * 1000; 3000 break; 3001 case POWER_SUPPLY_PROP_VOLTAGE_AVG: 3002 /* 3003 * This property is used to indicate when CV mode is entered 3004 * for the USB charger 3005 */ 3006 di->usb.cv_active = ab8500_charger_usb_cv(di); 3007 val->intval = di->usb.cv_active; 3008 break; 3009 case POWER_SUPPLY_PROP_CURRENT_NOW: 3010 ret = ab8500_charger_get_usb_current(di); 3011 if (ret >= 0) 3012 di->usb.charger_current = ret; 3013 val->intval = di->usb.charger_current * 1000; 3014 break; 3015 case POWER_SUPPLY_PROP_CURRENT_AVG: 3016 /* 3017 * This property is used to indicate when VBUS has collapsed 3018 * due to too high output current from the USB charger 3019 */ 3020 if (di->flags.vbus_collapse) 3021 val->intval = 1; 3022 else 3023 val->intval = 0; 3024 break; 3025 default: 3026 return -EINVAL; 3027 } 3028 return 0; 3029 } 3030 3031 /** 3032 * ab8500_charger_init_hw_registers() - Set up charger related registers 3033 * @di: pointer to the ab8500_charger structure 3034 * 3035 * Set up charger OVV, watchdog and maximum voltage registers as well as 3036 * charging of the backup battery 3037 */ 3038 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di) 3039 { 3040 int ret = 0; 3041 3042 /* Setup maximum charger current and voltage for ABB cut2.0 */ 3043 if (!is_ab8500_1p1_or_earlier(di->parent)) { 3044 ret = abx500_set_register_interruptible(di->dev, 3045 AB8500_CHARGER, 3046 AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6); 3047 if (ret) { 3048 dev_err(di->dev, 3049 "failed to set CH_VOLT_LVL_MAX_REG\n"); 3050 goto out; 3051 } 3052 3053 ret = abx500_set_register_interruptible(di->dev, 3054 AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG, 3055 CH_OP_CUR_LVL_1P6); 3056 if (ret) { 3057 dev_err(di->dev, 3058 "failed to set CH_OPT_CRNTLVL_MAX_REG\n"); 3059 goto out; 3060 } 3061 } 3062 3063 if (is_ab8505_2p0(di->parent)) 3064 ret = abx500_mask_and_set_register_interruptible(di->dev, 3065 AB8500_CHARGER, 3066 AB8500_USBCH_CTRL2_REG, 3067 VBUS_AUTO_IN_CURR_LIM_ENA, 3068 VBUS_AUTO_IN_CURR_LIM_ENA); 3069 else 3070 /* 3071 * VBUS OVV set to 6.3V and enable automatic current limitation 3072 */ 3073 ret = abx500_set_register_interruptible(di->dev, 3074 AB8500_CHARGER, 3075 AB8500_USBCH_CTRL2_REG, 3076 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA); 3077 if (ret) { 3078 dev_err(di->dev, 3079 "failed to set automatic current limitation\n"); 3080 goto out; 3081 } 3082 3083 /* Enable main watchdog in OTP */ 3084 ret = abx500_set_register_interruptible(di->dev, 3085 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD); 3086 if (ret) { 3087 dev_err(di->dev, "failed to enable main WD in OTP\n"); 3088 goto out; 3089 } 3090 3091 /* Enable main watchdog */ 3092 ret = abx500_set_register_interruptible(di->dev, 3093 AB8500_SYS_CTRL2_BLOCK, 3094 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA); 3095 if (ret) { 3096 dev_err(di->dev, "failed to enable main watchdog\n"); 3097 goto out; 3098 } 3099 3100 /* 3101 * Due to internal synchronisation, Enable and Kick watchdog bits 3102 * cannot be enabled in a single write. 3103 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted 3104 * between writing Enable then Kick bits. 3105 */ 3106 udelay(63); 3107 3108 /* Kick main watchdog */ 3109 ret = abx500_set_register_interruptible(di->dev, 3110 AB8500_SYS_CTRL2_BLOCK, 3111 AB8500_MAIN_WDOG_CTRL_REG, 3112 (MAIN_WDOG_ENA | MAIN_WDOG_KICK)); 3113 if (ret) { 3114 dev_err(di->dev, "failed to kick main watchdog\n"); 3115 goto out; 3116 } 3117 3118 /* Disable main watchdog */ 3119 ret = abx500_set_register_interruptible(di->dev, 3120 AB8500_SYS_CTRL2_BLOCK, 3121 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS); 3122 if (ret) { 3123 dev_err(di->dev, "failed to disable main watchdog\n"); 3124 goto out; 3125 } 3126 3127 /* Set watchdog timeout */ 3128 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 3129 AB8500_CH_WD_TIMER_REG, WD_TIMER); 3130 if (ret) { 3131 dev_err(di->dev, "failed to set charger watchdog timeout\n"); 3132 goto out; 3133 } 3134 3135 ret = ab8500_charger_led_en(di, false); 3136 if (ret < 0) { 3137 dev_err(di->dev, "failed to disable LED\n"); 3138 goto out; 3139 } 3140 3141 ret = abx500_set_register_interruptible(di->dev, 3142 AB8500_RTC, 3143 AB8500_RTC_BACKUP_CHG_REG, 3144 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i); 3145 if (ret) { 3146 dev_err(di->dev, "failed to setup backup battery charging\n"); 3147 goto out; 3148 } 3149 3150 /* Enable backup battery charging */ 3151 ret = abx500_mask_and_set_register_interruptible(di->dev, 3152 AB8500_RTC, AB8500_RTC_CTRL_REG, 3153 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA); 3154 if (ret < 0) { 3155 dev_err(di->dev, "%s mask and set failed\n", __func__); 3156 goto out; 3157 } 3158 3159 out: 3160 return ret; 3161 } 3162 3163 /* 3164 * ab8500 charger driver interrupts and their respective isr 3165 */ 3166 static struct ab8500_charger_interrupts ab8500_charger_irq[] = { 3167 {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler}, 3168 {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler}, 3169 {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler}, 3170 {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler}, 3171 {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler}, 3172 {"VBUS_DET_F", ab8500_charger_vbusdetf_handler}, 3173 {"VBUS_DET_R", ab8500_charger_vbusdetr_handler}, 3174 {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler}, 3175 {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler}, 3176 {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler}, 3177 {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler}, 3178 {"VBUS_OVV", ab8500_charger_vbusovv_handler}, 3179 {"CH_WD_EXP", ab8500_charger_chwdexp_handler}, 3180 {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler}, 3181 }; 3182 3183 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb, 3184 unsigned long event, void *power) 3185 { 3186 struct ab8500_charger *di = 3187 container_of(nb, struct ab8500_charger, nb); 3188 enum ab8500_usb_state bm_usb_state; 3189 unsigned mA = *((unsigned *)power); 3190 3191 if (!di) 3192 return NOTIFY_DONE; 3193 3194 if (event != USB_EVENT_VBUS) { 3195 dev_dbg(di->dev, "not a standard host, returning\n"); 3196 return NOTIFY_DONE; 3197 } 3198 3199 /* TODO: State is fabricate here. See if charger really needs USB 3200 * state or if mA is enough 3201 */ 3202 if ((di->usb_state.usb_current == 2) && (mA > 2)) 3203 bm_usb_state = AB8500_BM_USB_STATE_RESUME; 3204 else if (mA == 0) 3205 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS; 3206 else if (mA == 2) 3207 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND; 3208 else if (mA >= 8) /* 8, 100, 500 */ 3209 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED; 3210 else /* Should never occur */ 3211 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS; 3212 3213 dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", 3214 __func__, bm_usb_state, mA); 3215 3216 spin_lock(&di->usb_state.usb_lock); 3217 di->usb_state.state_tmp = bm_usb_state; 3218 di->usb_state.usb_current_tmp = mA; 3219 spin_unlock(&di->usb_state.usb_lock); 3220 3221 /* 3222 * wait for some time until you get updates from the usb stack 3223 * and negotiations are completed 3224 */ 3225 queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2); 3226 3227 return NOTIFY_OK; 3228 } 3229 3230 static int __maybe_unused ab8500_charger_resume(struct device *dev) 3231 { 3232 int ret; 3233 struct ab8500_charger *di = dev_get_drvdata(dev); 3234 3235 /* 3236 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog 3237 * logic. That means we have to continuously kick the charger 3238 * watchdog even when no charger is connected. This is only 3239 * valid once the AC charger has been enabled. This is 3240 * a bug that is not handled by the algorithm and the 3241 * watchdog have to be kicked by the charger driver 3242 * when the AC charger is disabled 3243 */ 3244 if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) { 3245 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER, 3246 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK); 3247 if (ret) 3248 dev_err(di->dev, "Failed to kick WD!\n"); 3249 3250 /* If not already pending start a new timer */ 3251 queue_delayed_work(di->charger_wq, &di->kick_wd_work, 3252 round_jiffies(WD_KICK_INTERVAL)); 3253 } 3254 3255 /* If we still have a HW failure, schedule a new check */ 3256 if (di->flags.mainextchnotok || di->flags.vbus_ovv) { 3257 queue_delayed_work(di->charger_wq, 3258 &di->check_hw_failure_work, 0); 3259 } 3260 3261 if (di->flags.vbus_drop_end) 3262 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0); 3263 3264 return 0; 3265 } 3266 3267 static int __maybe_unused ab8500_charger_suspend(struct device *dev) 3268 { 3269 struct ab8500_charger *di = dev_get_drvdata(dev); 3270 3271 /* Cancel any pending jobs */ 3272 cancel_delayed_work(&di->check_hw_failure_work); 3273 cancel_delayed_work(&di->vbus_drop_end_work); 3274 3275 flush_delayed_work(&di->attach_work); 3276 flush_delayed_work(&di->usb_charger_attached_work); 3277 flush_delayed_work(&di->ac_charger_attached_work); 3278 flush_delayed_work(&di->check_usbchgnotok_work); 3279 flush_delayed_work(&di->check_vbat_work); 3280 flush_delayed_work(&di->kick_wd_work); 3281 3282 flush_work(&di->usb_link_status_work); 3283 flush_work(&di->ac_work); 3284 flush_work(&di->detect_usb_type_work); 3285 3286 if (atomic_read(&di->current_stepping_sessions)) 3287 return -EAGAIN; 3288 3289 return 0; 3290 } 3291 3292 static struct notifier_block charger_nb = { 3293 .notifier_call = ab8500_external_charger_prepare, 3294 }; 3295 3296 static char *supply_interface[] = { 3297 "ab8500_chargalg", 3298 "ab8500_fg", 3299 "ab8500_btemp", 3300 }; 3301 3302 static const struct power_supply_desc ab8500_ac_chg_desc = { 3303 .name = "ab8500_ac", 3304 .type = POWER_SUPPLY_TYPE_MAINS, 3305 .properties = ab8500_charger_ac_props, 3306 .num_properties = ARRAY_SIZE(ab8500_charger_ac_props), 3307 .get_property = ab8500_charger_ac_get_property, 3308 }; 3309 3310 static const struct power_supply_desc ab8500_usb_chg_desc = { 3311 .name = "ab8500_usb", 3312 .type = POWER_SUPPLY_TYPE_USB, 3313 .properties = ab8500_charger_usb_props, 3314 .num_properties = ARRAY_SIZE(ab8500_charger_usb_props), 3315 .get_property = ab8500_charger_usb_get_property, 3316 }; 3317 3318 static int ab8500_charger_bind(struct device *dev) 3319 { 3320 struct ab8500_charger *di = dev_get_drvdata(dev); 3321 int ch_stat; 3322 int ret; 3323 3324 /* Create a work queue for the charger */ 3325 di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq", 3326 WQ_MEM_RECLAIM); 3327 if (di->charger_wq == NULL) { 3328 dev_err(dev, "failed to create work queue\n"); 3329 return -ENOMEM; 3330 } 3331 3332 ch_stat = ab8500_charger_detect_chargers(di, false); 3333 3334 if (ch_stat & AC_PW_CONN) { 3335 if (is_ab8500(di->parent)) 3336 queue_delayed_work(di->charger_wq, 3337 &di->ac_charger_attached_work, 3338 HZ); 3339 } 3340 if (ch_stat & USB_PW_CONN) { 3341 if (is_ab8500(di->parent)) 3342 queue_delayed_work(di->charger_wq, 3343 &di->usb_charger_attached_work, 3344 HZ); 3345 di->vbus_detected = true; 3346 di->vbus_detected_start = true; 3347 queue_work(di->charger_wq, 3348 &di->detect_usb_type_work); 3349 } 3350 3351 ret = component_bind_all(dev, di); 3352 if (ret) { 3353 dev_err(dev, "can't bind component devices\n"); 3354 return ret; 3355 } 3356 3357 return 0; 3358 } 3359 3360 static void ab8500_charger_unbind(struct device *dev) 3361 { 3362 struct ab8500_charger *di = dev_get_drvdata(dev); 3363 int ret; 3364 3365 /* Disable AC charging */ 3366 ab8500_charger_ac_en(&di->ac_chg, false, 0, 0); 3367 3368 /* Disable USB charging */ 3369 ab8500_charger_usb_en(&di->usb_chg, false, 0, 0); 3370 3371 /* Backup battery voltage and current disable */ 3372 ret = abx500_mask_and_set_register_interruptible(di->dev, 3373 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0); 3374 if (ret < 0) 3375 dev_err(di->dev, "%s mask and set failed\n", __func__); 3376 3377 /* Delete the work queue */ 3378 destroy_workqueue(di->charger_wq); 3379 3380 flush_scheduled_work(); 3381 3382 /* Unbind fg, btemp, algorithm */ 3383 component_unbind_all(dev, di); 3384 } 3385 3386 static const struct component_master_ops ab8500_charger_comp_ops = { 3387 .bind = ab8500_charger_bind, 3388 .unbind = ab8500_charger_unbind, 3389 }; 3390 3391 static struct platform_driver *const ab8500_charger_component_drivers[] = { 3392 &ab8500_fg_driver, 3393 &ab8500_btemp_driver, 3394 &abx500_chargalg_driver, 3395 }; 3396 3397 static int ab8500_charger_compare_dev(struct device *dev, void *data) 3398 { 3399 return dev == data; 3400 } 3401 3402 static int ab8500_charger_probe(struct platform_device *pdev) 3403 { 3404 struct device *dev = &pdev->dev; 3405 struct device_node *np = dev->of_node; 3406 struct component_match *match = NULL; 3407 struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {}; 3408 struct ab8500_charger *di; 3409 int charger_status; 3410 int i, irq; 3411 int ret; 3412 3413 di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL); 3414 if (!di) 3415 return -ENOMEM; 3416 3417 di->bm = &ab8500_bm_data; 3418 3419 ret = ab8500_bm_of_probe(dev, np, di->bm); 3420 if (ret) { 3421 dev_err(dev, "failed to get battery information\n"); 3422 return ret; 3423 } 3424 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg"); 3425 3426 /* get parent data */ 3427 di->dev = dev; 3428 di->parent = dev_get_drvdata(pdev->dev.parent); 3429 3430 /* Get ADC channels */ 3431 di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v"); 3432 if (IS_ERR(di->adc_main_charger_v)) { 3433 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v), 3434 "failed to get ADC main charger voltage\n"); 3435 return ret; 3436 } 3437 di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c"); 3438 if (IS_ERR(di->adc_main_charger_c)) { 3439 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c), 3440 "failed to get ADC main charger current\n"); 3441 return ret; 3442 } 3443 di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v"); 3444 if (IS_ERR(di->adc_vbus_v)) { 3445 ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v), 3446 "failed to get ADC USB charger voltage\n"); 3447 return ret; 3448 } 3449 di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c"); 3450 if (IS_ERR(di->adc_usb_charger_c)) { 3451 ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c), 3452 "failed to get ADC USB charger current\n"); 3453 return ret; 3454 } 3455 3456 /* 3457 * VDD ADC supply needs to be enabled from this driver when there 3458 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW 3459 * interrupts during charging 3460 */ 3461 di->regu = devm_regulator_get(dev, "vddadc"); 3462 if (IS_ERR(di->regu)) { 3463 ret = PTR_ERR(di->regu); 3464 dev_err(dev, "failed to get vddadc regulator\n"); 3465 return ret; 3466 } 3467 3468 /* Request interrupts */ 3469 for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) { 3470 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name); 3471 if (irq < 0) 3472 return irq; 3473 3474 ret = devm_request_threaded_irq(dev, 3475 irq, NULL, ab8500_charger_irq[i].isr, 3476 IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT, 3477 ab8500_charger_irq[i].name, di); 3478 3479 if (ret != 0) { 3480 dev_err(dev, "failed to request %s IRQ %d: %d\n" 3481 , ab8500_charger_irq[i].name, irq, ret); 3482 return ret; 3483 } 3484 dev_dbg(dev, "Requested %s IRQ %d: %d\n", 3485 ab8500_charger_irq[i].name, irq, ret); 3486 } 3487 3488 /* initialize lock */ 3489 spin_lock_init(&di->usb_state.usb_lock); 3490 mutex_init(&di->usb_ipt_crnt_lock); 3491 3492 di->autopower = false; 3493 di->invalid_charger_detect_state = 0; 3494 3495 /* AC and USB supply config */ 3496 ac_psy_cfg.supplied_to = supply_interface; 3497 ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 3498 ac_psy_cfg.drv_data = &di->ac_chg; 3499 usb_psy_cfg.supplied_to = supply_interface; 3500 usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface); 3501 usb_psy_cfg.drv_data = &di->usb_chg; 3502 3503 /* AC supply */ 3504 /* ux500_charger sub-class */ 3505 di->ac_chg.ops.enable = &ab8500_charger_ac_en; 3506 di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable; 3507 di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; 3508 di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current; 3509 di->ac_chg.max_out_volt = ab8500_charger_voltage_map[ 3510 ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; 3511 di->ac_chg.max_out_curr = 3512 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; 3513 di->ac_chg.wdt_refresh = CHG_WD_INTERVAL; 3514 /* 3515 * The AB8505 only supports USB charging. If we are not the 3516 * AB8505, register an AC charger. 3517 * 3518 * TODO: if this should be opt-in, add DT properties for this. 3519 */ 3520 if (!is_ab8505(di->parent)) 3521 di->ac_chg.enabled = true; 3522 di->ac_chg.external = false; 3523 3524 /* USB supply */ 3525 /* ux500_charger sub-class */ 3526 di->usb_chg.ops.enable = &ab8500_charger_usb_en; 3527 di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable; 3528 di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick; 3529 di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current; 3530 di->usb_chg.max_out_volt = ab8500_charger_voltage_map[ 3531 ARRAY_SIZE(ab8500_charger_voltage_map) - 1]; 3532 di->usb_chg.max_out_curr = 3533 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1]; 3534 di->usb_chg.wdt_refresh = CHG_WD_INTERVAL; 3535 di->usb_chg.external = false; 3536 di->usb_state.usb_current = -1; 3537 3538 mutex_init(&di->charger_attached_mutex); 3539 3540 /* Init work for HW failure check */ 3541 INIT_DEFERRABLE_WORK(&di->check_hw_failure_work, 3542 ab8500_charger_check_hw_failure_work); 3543 INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work, 3544 ab8500_charger_check_usbchargernotok_work); 3545 3546 INIT_DELAYED_WORK(&di->ac_charger_attached_work, 3547 ab8500_charger_ac_attached_work); 3548 INIT_DELAYED_WORK(&di->usb_charger_attached_work, 3549 ab8500_charger_usb_attached_work); 3550 3551 /* 3552 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog 3553 * logic. That means we have to continuously kick the charger 3554 * watchdog even when no charger is connected. This is only 3555 * valid once the AC charger has been enabled. This is 3556 * a bug that is not handled by the algorithm and the 3557 * watchdog have to be kicked by the charger driver 3558 * when the AC charger is disabled 3559 */ 3560 INIT_DEFERRABLE_WORK(&di->kick_wd_work, 3561 ab8500_charger_kick_watchdog_work); 3562 3563 INIT_DEFERRABLE_WORK(&di->check_vbat_work, 3564 ab8500_charger_check_vbat_work); 3565 3566 INIT_DELAYED_WORK(&di->attach_work, 3567 ab8500_charger_usb_link_attach_work); 3568 3569 INIT_DELAYED_WORK(&di->usb_state_changed_work, 3570 ab8500_charger_usb_state_changed_work); 3571 3572 INIT_DELAYED_WORK(&di->vbus_drop_end_work, 3573 ab8500_charger_vbus_drop_end_work); 3574 3575 /* Init work for charger detection */ 3576 INIT_WORK(&di->usb_link_status_work, 3577 ab8500_charger_usb_link_status_work); 3578 INIT_WORK(&di->ac_work, ab8500_charger_ac_work); 3579 INIT_WORK(&di->detect_usb_type_work, 3580 ab8500_charger_detect_usb_type_work); 3581 3582 /* Init work for checking HW status */ 3583 INIT_WORK(&di->check_main_thermal_prot_work, 3584 ab8500_charger_check_main_thermal_prot_work); 3585 INIT_WORK(&di->check_usb_thermal_prot_work, 3586 ab8500_charger_check_usb_thermal_prot_work); 3587 3588 3589 /* Initialize OVV, and other registers */ 3590 ret = ab8500_charger_init_hw_registers(di); 3591 if (ret) { 3592 dev_err(dev, "failed to initialize ABB registers\n"); 3593 return ret; 3594 } 3595 3596 /* Register AC charger class */ 3597 if (di->ac_chg.enabled) { 3598 di->ac_chg.psy = devm_power_supply_register(dev, 3599 &ab8500_ac_chg_desc, 3600 &ac_psy_cfg); 3601 if (IS_ERR(di->ac_chg.psy)) { 3602 dev_err(dev, "failed to register AC charger\n"); 3603 return PTR_ERR(di->ac_chg.psy); 3604 } 3605 } 3606 3607 /* Register USB charger class */ 3608 di->usb_chg.psy = devm_power_supply_register(dev, 3609 &ab8500_usb_chg_desc, 3610 &usb_psy_cfg); 3611 if (IS_ERR(di->usb_chg.psy)) { 3612 dev_err(dev, "failed to register USB charger\n"); 3613 return PTR_ERR(di->usb_chg.psy); 3614 } 3615 3616 /* Identify the connected charger types during startup */ 3617 charger_status = ab8500_charger_detect_chargers(di, true); 3618 if (charger_status & AC_PW_CONN) { 3619 di->ac.charger_connected = 1; 3620 di->ac_conn = true; 3621 ab8500_power_supply_changed(di, di->ac_chg.psy); 3622 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present"); 3623 } 3624 3625 platform_set_drvdata(pdev, di); 3626 3627 /* Create something that will match the subdrivers when we bind */ 3628 for (i = 0; i < ARRAY_SIZE(ab8500_charger_component_drivers); i++) { 3629 struct device_driver *drv = &ab8500_charger_component_drivers[i]->driver; 3630 struct device *p = NULL, *d; 3631 3632 while ((d = platform_find_device_by_driver(p, drv))) { 3633 put_device(p); 3634 component_match_add(dev, &match, 3635 ab8500_charger_compare_dev, d); 3636 p = d; 3637 } 3638 put_device(p); 3639 } 3640 if (!match) { 3641 dev_err(dev, "no matching components\n"); 3642 return -ENODEV; 3643 } 3644 if (IS_ERR(match)) { 3645 dev_err(dev, "could not create component match\n"); 3646 return PTR_ERR(match); 3647 } 3648 3649 /* Notifier for external charger enabling */ 3650 if (!di->ac_chg.enabled) 3651 blocking_notifier_chain_register( 3652 &charger_notifier_list, &charger_nb); 3653 3654 3655 di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); 3656 if (IS_ERR_OR_NULL(di->usb_phy)) { 3657 dev_err(dev, "failed to get usb transceiver\n"); 3658 ret = -EINVAL; 3659 goto out_charger_notifier; 3660 } 3661 di->nb.notifier_call = ab8500_charger_usb_notifier_call; 3662 ret = usb_register_notifier(di->usb_phy, &di->nb); 3663 if (ret) { 3664 dev_err(dev, "failed to register usb notifier\n"); 3665 goto put_usb_phy; 3666 } 3667 3668 3669 ret = component_master_add_with_match(&pdev->dev, 3670 &ab8500_charger_comp_ops, 3671 match); 3672 if (ret) { 3673 dev_err(dev, "failed to add component master\n"); 3674 goto free_notifier; 3675 } 3676 3677 return 0; 3678 3679 free_notifier: 3680 usb_unregister_notifier(di->usb_phy, &di->nb); 3681 put_usb_phy: 3682 usb_put_phy(di->usb_phy); 3683 out_charger_notifier: 3684 if (!di->ac_chg.enabled) 3685 blocking_notifier_chain_unregister( 3686 &charger_notifier_list, &charger_nb); 3687 return ret; 3688 } 3689 3690 static int ab8500_charger_remove(struct platform_device *pdev) 3691 { 3692 struct ab8500_charger *di = platform_get_drvdata(pdev); 3693 3694 component_master_del(&pdev->dev, &ab8500_charger_comp_ops); 3695 3696 usb_unregister_notifier(di->usb_phy, &di->nb); 3697 usb_put_phy(di->usb_phy); 3698 if (!di->ac_chg.enabled) 3699 blocking_notifier_chain_unregister( 3700 &charger_notifier_list, &charger_nb); 3701 3702 return 0; 3703 } 3704 3705 static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_charger_resume); 3706 3707 static const struct of_device_id ab8500_charger_match[] = { 3708 { .compatible = "stericsson,ab8500-charger", }, 3709 { }, 3710 }; 3711 3712 static struct platform_driver ab8500_charger_driver = { 3713 .probe = ab8500_charger_probe, 3714 .remove = ab8500_charger_remove, 3715 .driver = { 3716 .name = "ab8500-charger", 3717 .of_match_table = ab8500_charger_match, 3718 .pm = &ab8500_charger_pm_ops, 3719 }, 3720 }; 3721 3722 static int __init ab8500_charger_init(void) 3723 { 3724 int ret; 3725 3726 ret = platform_register_drivers(ab8500_charger_component_drivers, 3727 ARRAY_SIZE(ab8500_charger_component_drivers)); 3728 if (ret) 3729 return ret; 3730 3731 return platform_driver_register(&ab8500_charger_driver); 3732 } 3733 3734 static void __exit ab8500_charger_exit(void) 3735 { 3736 platform_unregister_drivers(ab8500_charger_component_drivers, 3737 ARRAY_SIZE(ab8500_charger_component_drivers)); 3738 platform_driver_unregister(&ab8500_charger_driver); 3739 } 3740 3741 module_init(ab8500_charger_init); 3742 module_exit(ab8500_charger_exit); 3743 3744 MODULE_LICENSE("GPL v2"); 3745 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy"); 3746 MODULE_ALIAS("platform:ab8500-charger"); 3747 MODULE_DESCRIPTION("AB8500 charger management driver"); 3748