drivers/power/supply/ab8500_charger.c

   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/interrupt.h>
  17 #include <linux/delay.h>
  18 #include <linux/notifier.h>
  19 #include <linux/slab.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/power_supply.h>
  22 #include <linux/completion.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/err.h>
  25 #include <linux/workqueue.h>
  26 #include <linux/kobject.h>
  27 #include <linux/of.h>
  28 #include <linux/mfd/core.h>
  29 #include <linux/mfd/abx500/ab8500.h>
  30 #include <linux/mfd/abx500.h>
  31 #include <linux/mfd/abx500/ab8500-bm.h>
  32 #include <linux/mfd/abx500/ux500_chargalg.h>
  33 #include <linux/usb/otg.h>
  34 #include <linux/mutex.h>
  35 #include <linux/iio/consumer.h>
  36
  37 /* Charger constants */
  38 #define NO_PW_CONN                      0
  39 #define AC_PW_CONN                      1
  40 #define USB_PW_CONN                     2
  41
  42 #define MAIN_WDOG_ENA                   0x01
  43 #define MAIN_WDOG_KICK                  0x02
  44 #define MAIN_WDOG_DIS                   0x00
  45 #define CHARG_WD_KICK                   0x01
  46 #define MAIN_CH_ENA                     0x01
  47 #define MAIN_CH_NO_OVERSHOOT_ENA_N      0x02
  48 #define USB_CH_ENA                      0x01
  49 #define USB_CHG_NO_OVERSHOOT_ENA_N      0x02
  50 #define MAIN_CH_DET                     0x01
  51 #define MAIN_CH_CV_ON                   0x04
  52 #define USB_CH_CV_ON                    0x08
  53 #define VBUS_DET_DBNC100                0x02
  54 #define VBUS_DET_DBNC1                  0x01
  55 #define OTP_ENABLE_WD                   0x01
  56 #define DROP_COUNT_RESET                0x01
  57 #define USB_CH_DET                      0x01
  58
  59 #define MAIN_CH_INPUT_CURR_SHIFT        4
  60 #define VBUS_IN_CURR_LIM_SHIFT          4
  61 #define AUTO_VBUS_IN_CURR_LIM_SHIFT     4
  62 #define VBUS_IN_CURR_LIM_RETRY_SET_TIME 30 /* seconds */
  63
  64 #define LED_INDICATOR_PWM_ENA           0x01
  65 #define LED_INDICATOR_PWM_DIS           0x00
  66 #define LED_IND_CUR_5MA                 0x04
  67 #define LED_INDICATOR_PWM_DUTY_252_256  0xBF
  68
  69 /* HW failure constants */
  70 #define MAIN_CH_TH_PROT                 0x02
  71 #define VBUS_CH_NOK                     0x08
  72 #define USB_CH_TH_PROT                  0x02
  73 #define VBUS_OVV_TH                     0x01
  74 #define MAIN_CH_NOK                     0x01
  75 #define VBUS_DET                        0x80
  76
  77 #define MAIN_CH_STATUS2_MAINCHGDROP             0x80
  78 #define MAIN_CH_STATUS2_MAINCHARGERDETDBNC      0x40
  79 #define USB_CH_VBUSDROP                         0x40
  80 #define USB_CH_VBUSDETDBNC                      0x01
  81
  82 /* UsbLineStatus register bit masks */
  83 #define AB8500_USB_LINK_STATUS          0x78
  84 #define AB8505_USB_LINK_STATUS          0xF8
  85 #define AB8500_STD_HOST_SUSP            0x18
  86 #define USB_LINK_STATUS_SHIFT           3
  87
  88 /* Watchdog timeout constant */
  89 #define WD_TIMER                        0x30 /* 4min */
  90 #define WD_KICK_INTERVAL                (60 * HZ)
  91
  92 /* Lowest charger voltage is 3.39V -> 0x4E */
  93 #define LOW_VOLT_REG                    0x4E
  94
  95 /* Step up/down delay in us */
  96 #define STEP_UDELAY                     1000
  97
  98 #define CHARGER_STATUS_POLL 10 /* in ms */
  99
 100 #define CHG_WD_INTERVAL                 (60 * HZ)
 101
 102 #define AB8500_SW_CONTROL_FALLBACK      0x03
 103 /* Wait for enumeration before charing in us */
 104 #define WAIT_ACA_RID_ENUMERATION        (5 * 1000)
 105 /*External charger control*/
 106 #define AB8500_SYS_CHARGER_CONTROL_REG          0x52
 107 #define EXTERNAL_CHARGER_DISABLE_REG_VAL        0x03
 108 #define EXTERNAL_CHARGER_ENABLE_REG_VAL         0x07
 109
 110 /* UsbLineStatus register - usb types */
 111 enum ab8500_charger_link_status {
 112         USB_STAT_NOT_CONFIGURED,
 113         USB_STAT_STD_HOST_NC,
 114         USB_STAT_STD_HOST_C_NS,
 115         USB_STAT_STD_HOST_C_S,
 116         USB_STAT_HOST_CHG_NM,
 117         USB_STAT_HOST_CHG_HS,
 118         USB_STAT_HOST_CHG_HS_CHIRP,
 119         USB_STAT_DEDICATED_CHG,
 120         USB_STAT_ACA_RID_A,
 121         USB_STAT_ACA_RID_B,
 122         USB_STAT_ACA_RID_C_NM,
 123         USB_STAT_ACA_RID_C_HS,
 124         USB_STAT_ACA_RID_C_HS_CHIRP,
 125         USB_STAT_HM_IDGND,
 126         USB_STAT_RESERVED,
 127         USB_STAT_NOT_VALID_LINK,
 128         USB_STAT_PHY_EN,
 129         USB_STAT_SUP_NO_IDGND_VBUS,
 130         USB_STAT_SUP_IDGND_VBUS,
 131         USB_STAT_CHARGER_LINE_1,
 132         USB_STAT_CARKIT_1,
 133         USB_STAT_CARKIT_2,
 134         USB_STAT_ACA_DOCK_CHARGER,
 135 };
 136
 137 enum ab8500_usb_state {
 138         AB8500_BM_USB_STATE_RESET_HS,   /* HighSpeed Reset */
 139         AB8500_BM_USB_STATE_RESET_FS,   /* FullSpeed/LowSpeed Reset */
 140         AB8500_BM_USB_STATE_CONFIGURED,
 141         AB8500_BM_USB_STATE_SUSPEND,
 142         AB8500_BM_USB_STATE_RESUME,
 143         AB8500_BM_USB_STATE_MAX,
 144 };
 145
 146 /* VBUS input current limits supported in AB8500 in mA */
 147 #define USB_CH_IP_CUR_LVL_0P05          50
 148 #define USB_CH_IP_CUR_LVL_0P09          98
 149 #define USB_CH_IP_CUR_LVL_0P19          193
 150 #define USB_CH_IP_CUR_LVL_0P29          290
 151 #define USB_CH_IP_CUR_LVL_0P38          380
 152 #define USB_CH_IP_CUR_LVL_0P45          450
 153 #define USB_CH_IP_CUR_LVL_0P5           500
 154 #define USB_CH_IP_CUR_LVL_0P6           600
 155 #define USB_CH_IP_CUR_LVL_0P7           700
 156 #define USB_CH_IP_CUR_LVL_0P8           800
 157 #define USB_CH_IP_CUR_LVL_0P9           900
 158 #define USB_CH_IP_CUR_LVL_1P0           1000
 159 #define USB_CH_IP_CUR_LVL_1P1           1100
 160 #define USB_CH_IP_CUR_LVL_1P3           1300
 161 #define USB_CH_IP_CUR_LVL_1P4           1400
 162 #define USB_CH_IP_CUR_LVL_1P5           1500
 163
 164 #define VBAT_TRESH_IP_CUR_RED           3800
 165
 166 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
 167         struct ab8500_charger, usb_chg)
 168 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
 169         struct ab8500_charger, ac_chg)
 170
 171 /**
 172  * struct ab8500_charger_interrupts - ab8500 interupts
 173  * @name:       name of the interrupt
 174  * @isr         function pointer to the isr
 175  */
 176 struct ab8500_charger_interrupts {
 177         char *name;
 178         irqreturn_t (*isr)(int irq, void *data);
 179 };
 180
 181 struct ab8500_charger_info {
 182         int charger_connected;
 183         int charger_online;
 184         int charger_voltage;
 185         int cv_active;
 186         bool wd_expired;
 187         int charger_current;
 188 };
 189
 190 struct ab8500_charger_event_flags {
 191         bool mainextchnotok;
 192         bool main_thermal_prot;
 193         bool usb_thermal_prot;
 194         bool vbus_ovv;
 195         bool usbchargernotok;
 196         bool chgwdexp;
 197         bool vbus_collapse;
 198         bool vbus_drop_end;
 199 };
 200
 201 struct ab8500_charger_usb_state {
 202         int usb_current;
 203         int usb_current_tmp;
 204         enum ab8500_usb_state state;
 205         enum ab8500_usb_state state_tmp;
 206         spinlock_t usb_lock;
 207 };
 208
 209 struct ab8500_charger_max_usb_in_curr {
 210         int usb_type_max;
 211         int set_max;
 212         int calculated_max;
 213 };
 214
 215 /**
 216  * struct ab8500_charger - ab8500 Charger device information
 217  * @dev:                Pointer to the structure device
 218  * @vbus_detected:      VBUS detected
 219  * @vbus_detected_start:
 220  *                      VBUS detected during startup
 221  * @ac_conn:            This will be true when the AC charger has been plugged
 222  * @vddadc_en_ac:       Indicate if VDD ADC supply is enabled because AC
 223  *                      charger is enabled
 224  * @vddadc_en_usb:      Indicate if VDD ADC supply is enabled because USB
 225  *                      charger is enabled
 226  * @vbat                Battery voltage
 227  * @old_vbat            Previously measured battery voltage
 228  * @usb_device_is_unrecognised  USB device is unrecognised by the hardware
 229  * @autopower           Indicate if we should have automatic pwron after pwrloss
 230  * @autopower_cfg       platform specific power config support for "pwron after pwrloss"
 231  * @invalid_charger_detect_state State when forcing AB to use invalid charger
 232  * @is_aca_rid:         Incicate if accessory is ACA type
 233  * @current_stepping_sessions:
 234  *                      Counter for current stepping sessions
 235  * @parent:             Pointer to the struct ab8500
 236  * @adc_main_charger_v  ADC channel for main charger voltage
 237  * @adc_main_charger_c  ADC channel for main charger current
 238  * @adc_vbus_v          ADC channel for USB charger voltage
 239  * @adc_usb_charger_c   ADC channel for USB charger current
 240  * @bm:                 Platform specific battery management information
 241  * @flags:              Structure for information about events triggered
 242  * @usb_state:          Structure for usb stack information
 243  * @max_usb_in_curr:    Max USB charger input current
 244  * @ac_chg:             AC charger power supply
 245  * @usb_chg:            USB charger power supply
 246  * @ac:                 Structure that holds the AC charger properties
 247  * @usb:                Structure that holds the USB charger properties
 248  * @regu:               Pointer to the struct regulator
 249  * @charger_wq:         Work queue for the IRQs and checking HW state
 250  * @usb_ipt_crnt_lock:  Lock to protect VBUS input current setting from mutuals
 251  * @pm_lock:            Lock to prevent system to suspend
 252  * @check_vbat_work     Work for checking vbat threshold to adjust vbus current
 253  * @check_hw_failure_work:      Work for checking HW state
 254  * @check_usbchgnotok_work:     Work for checking USB charger not ok status
 255  * @kick_wd_work:               Work for kicking the charger watchdog in case
 256  *                              of ABB rev 1.* due to the watchog logic bug
 257  * @ac_charger_attached_work:   Work for checking if AC charger is still
 258  *                              connected
 259  * @usb_charger_attached_work:  Work for checking if USB charger is still
 260  *                              connected
 261  * @ac_work:                    Work for checking AC charger connection
 262  * @detect_usb_type_work:       Work for detecting the USB type connected
 263  * @usb_link_status_work:       Work for checking the new USB link status
 264  * @usb_state_changed_work:     Work for checking USB state
 265  * @attach_work:                Work for detecting USB type
 266  * @vbus_drop_end_work:         Work for detecting VBUS drop end
 267  * @check_main_thermal_prot_work:
 268  *                              Work for checking Main thermal status
 269  * @check_usb_thermal_prot_work:
 270  *                              Work for checking USB thermal status
 271  * @charger_attached_mutex:     For controlling the wakelock
 272  */
 273 struct ab8500_charger {
 274         struct device *dev;
 275         bool vbus_detected;
 276         bool vbus_detected_start;
 277         bool ac_conn;
 278         bool vddadc_en_ac;
 279         bool vddadc_en_usb;
 280         int vbat;
 281         int old_vbat;
 282         bool usb_device_is_unrecognised;
 283         bool autopower;
 284         bool autopower_cfg;
 285         int invalid_charger_detect_state;
 286         int is_aca_rid;
 287         atomic_t current_stepping_sessions;
 288         struct ab8500 *parent;
 289         struct iio_channel *adc_main_charger_v;
 290         struct iio_channel *adc_main_charger_c;
 291         struct iio_channel *adc_vbus_v;
 292         struct iio_channel *adc_usb_charger_c;
 293         struct abx500_bm_data *bm;
 294         struct ab8500_charger_event_flags flags;
 295         struct ab8500_charger_usb_state usb_state;
 296         struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
 297         struct ux500_charger ac_chg;
 298         struct ux500_charger usb_chg;
 299         struct ab8500_charger_info ac;
 300         struct ab8500_charger_info usb;
 301         struct regulator *regu;
 302         struct workqueue_struct *charger_wq;
 303         struct mutex usb_ipt_crnt_lock;
 304         struct delayed_work check_vbat_work;
 305         struct delayed_work check_hw_failure_work;
 306         struct delayed_work check_usbchgnotok_work;
 307         struct delayed_work kick_wd_work;
 308         struct delayed_work usb_state_changed_work;
 309         struct delayed_work attach_work;
 310         struct delayed_work ac_charger_attached_work;
 311         struct delayed_work usb_charger_attached_work;
 312         struct delayed_work vbus_drop_end_work;
 313         struct work_struct ac_work;
 314         struct work_struct detect_usb_type_work;
 315         struct work_struct usb_link_status_work;
 316         struct work_struct check_main_thermal_prot_work;
 317         struct work_struct check_usb_thermal_prot_work;
 318         struct usb_phy *usb_phy;
 319         struct notifier_block nb;
 320         struct mutex charger_attached_mutex;
 321 };
 322
 323 /* AC properties */
 324 static enum power_supply_property ab8500_charger_ac_props[] = {
 325         POWER_SUPPLY_PROP_HEALTH,
 326         POWER_SUPPLY_PROP_PRESENT,
 327         POWER_SUPPLY_PROP_ONLINE,
 328         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 329         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 330         POWER_SUPPLY_PROP_CURRENT_NOW,
 331 };
 332
 333 /* USB properties */
 334 static enum power_supply_property ab8500_charger_usb_props[] = {
 335         POWER_SUPPLY_PROP_HEALTH,
 336         POWER_SUPPLY_PROP_CURRENT_AVG,
 337         POWER_SUPPLY_PROP_PRESENT,
 338         POWER_SUPPLY_PROP_ONLINE,
 339         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 340         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 341         POWER_SUPPLY_PROP_CURRENT_NOW,
 342 };
 343
 344 /*
 345  * Function for enabling and disabling sw fallback mode
 346  * should always be disabled when no charger is connected.
 347  */
 348 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
 349                 bool fallback)
 350 {
 351         u8 val;
 352         u8 reg;
 353         u8 bank;
 354         u8 bit;
 355         int ret;
 356
 357         dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
 358
 359         if (is_ab8500(di->parent)) {
 360                 bank = 0x15;
 361                 reg = 0x0;
 362                 bit = 3;
 363         } else {
 364                 bank = AB8500_SYS_CTRL1_BLOCK;
 365                 reg = AB8500_SW_CONTROL_FALLBACK;
 366                 bit = 0;
 367         }
 368
 369         /* read the register containing fallback bit */
 370         ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
 371         if (ret < 0) {
 372                 dev_err(di->dev, "%d read failed\n", __LINE__);
 373                 return;
 374         }
 375
 376         if (is_ab8500(di->parent)) {
 377                 /* enable the OPT emulation registers */
 378                 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
 379                 if (ret) {
 380                         dev_err(di->dev, "%d write failed\n", __LINE__);
 381                         goto disable_otp;
 382                 }
 383         }
 384
 385         if (fallback)
 386                 val |= (1 << bit);
 387         else
 388                 val &= ~(1 << bit);
 389
 390         /* write back the changed fallback bit value to register */
 391         ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
 392         if (ret) {
 393                 dev_err(di->dev, "%d write failed\n", __LINE__);
 394         }
 395
 396 disable_otp:
 397         if (is_ab8500(di->parent)) {
 398                 /* disable the set OTP registers again */
 399                 ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
 400                 if (ret) {
 401                         dev_err(di->dev, "%d write failed\n", __LINE__);
 402                 }
 403         }
 404 }
 405
 406 /**
 407  * ab8500_power_supply_changed - a wrapper with local extensions for
 408  * power_supply_changed
 409  * @di:   pointer to the ab8500_charger structure
 410  * @psy:  pointer to power_supply_that have changed.
 411  *
 412  */
 413 static void ab8500_power_supply_changed(struct ab8500_charger *di,
 414                                         struct power_supply *psy)
 415 {
 416         if (di->autopower_cfg) {
 417                 if (!di->usb.charger_connected &&
 418                     !di->ac.charger_connected &&
 419                     di->autopower) {
 420                         di->autopower = false;
 421                         ab8500_enable_disable_sw_fallback(di, false);
 422                 } else if (!di->autopower &&
 423                            (di->ac.charger_connected ||
 424                             di->usb.charger_connected)) {
 425                         di->autopower = true;
 426                         ab8500_enable_disable_sw_fallback(di, true);
 427                 }
 428         }
 429         power_supply_changed(psy);
 430 }
 431
 432 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
 433         bool connected)
 434 {
 435         if (connected != di->usb.charger_connected) {
 436                 dev_dbg(di->dev, "USB connected:%i\n", connected);
 437                 di->usb.charger_connected = connected;
 438
 439                 if (!connected)
 440                         di->flags.vbus_drop_end = false;
 441
 442                 sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");
 443
 444                 if (connected) {
 445                         mutex_lock(&di->charger_attached_mutex);
 446                         mutex_unlock(&di->charger_attached_mutex);
 447
 448                         if (is_ab8500(di->parent))
 449                                 queue_delayed_work(di->charger_wq,
 450                                            &di->usb_charger_attached_work,
 451                                            HZ);
 452                 } else {
 453                         cancel_delayed_work_sync(&di->usb_charger_attached_work);
 454                         mutex_lock(&di->charger_attached_mutex);
 455                         mutex_unlock(&di->charger_attached_mutex);
 456                 }
 457         }
 458 }
 459
 460 /**
 461  * ab8500_charger_get_ac_voltage() - get ac charger voltage
 462  * @di:         pointer to the ab8500_charger structure
 463  *
 464  * Returns ac charger voltage (on success)
 465  */
 466 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
 467 {
 468         int vch, ret;
 469
 470         /* Only measure voltage if the charger is connected */
 471         if (di->ac.charger_connected) {
 472                 ret = iio_read_channel_processed(di->adc_main_charger_v, &vch);
 473                 if (ret < 0)
 474                         dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 475         } else {
 476                 vch = 0;
 477         }
 478         return vch;
 479 }
 480
 481 /**
 482  * ab8500_charger_ac_cv() - check if the main charger is in CV mode
 483  * @di:         pointer to the ab8500_charger structure
 484  *
 485  * Returns ac charger CV mode (on success) else error code
 486  */
 487 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
 488 {
 489         u8 val;
 490         int ret = 0;
 491
 492         /* Only check CV mode if the charger is online */
 493         if (di->ac.charger_online) {
 494                 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 495                         AB8500_CH_STATUS1_REG, &val);
 496                 if (ret < 0) {
 497                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 498                         return 0;
 499                 }
 500
 501                 if (val & MAIN_CH_CV_ON)
 502                         ret = 1;
 503                 else
 504                         ret = 0;
 505         }
 506
 507         return ret;
 508 }
 509
 510 /**
 511  * ab8500_charger_get_vbus_voltage() - get vbus voltage
 512  * @di:         pointer to the ab8500_charger structure
 513  *
 514  * This function returns the vbus voltage.
 515  * Returns vbus voltage (on success)
 516  */
 517 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
 518 {
 519         int vch, ret;
 520
 521         /* Only measure voltage if the charger is connected */
 522         if (di->usb.charger_connected) {
 523                 ret = iio_read_channel_processed(di->adc_vbus_v, &vch);
 524                 if (ret < 0)
 525                         dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 526         } else {
 527                 vch = 0;
 528         }
 529         return vch;
 530 }
 531
 532 /**
 533  * ab8500_charger_get_usb_current() - get usb charger current
 534  * @di:         pointer to the ab8500_charger structure
 535  *
 536  * This function returns the usb charger current.
 537  * Returns usb current (on success) and error code on failure
 538  */
 539 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
 540 {
 541         int ich, ret;
 542
 543         /* Only measure current if the charger is online */
 544         if (di->usb.charger_online) {
 545                 ret = iio_read_channel_processed(di->adc_usb_charger_c, &ich);
 546                 if (ret < 0)
 547                         dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 548         } else {
 549                 ich = 0;
 550         }
 551         return ich;
 552 }
 553
 554 /**
 555  * ab8500_charger_get_ac_current() - get ac charger current
 556  * @di:         pointer to the ab8500_charger structure
 557  *
 558  * This function returns the ac charger current.
 559  * Returns ac current (on success) and error code on failure.
 560  */
 561 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
 562 {
 563         int ich, ret;
 564
 565         /* Only measure current if the charger is online */
 566         if (di->ac.charger_online) {
 567                 ret = iio_read_channel_processed(di->adc_main_charger_c, &ich);
 568                 if (ret < 0)
 569                         dev_err(di->dev, "%s ADC conv failed,\n", __func__);
 570         } else {
 571                 ich = 0;
 572         }
 573         return ich;
 574 }
 575
 576 /**
 577  * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
 578  * @di:         pointer to the ab8500_charger structure
 579  *
 580  * Returns ac charger CV mode (on success) else error code
 581  */
 582 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
 583 {
 584         int ret;
 585         u8 val;
 586
 587         /* Only check CV mode if the charger is online */
 588         if (di->usb.charger_online) {
 589                 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 590                         AB8500_CH_USBCH_STAT1_REG, &val);
 591                 if (ret < 0) {
 592                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 593                         return 0;
 594                 }
 595
 596                 if (val & USB_CH_CV_ON)
 597                         ret = 1;
 598                 else
 599                         ret = 0;
 600         } else {
 601                 ret = 0;
 602         }
 603
 604         return ret;
 605 }
 606
 607 /**
 608  * ab8500_charger_detect_chargers() - Detect the connected chargers
 609  * @di:         pointer to the ab8500_charger structure
 610  * @probe:      if probe, don't delay and wait for HW
 611  *
 612  * Returns the type of charger connected.
 613  * For USB it will not mean we can actually charge from it
 614  * but that there is a USB cable connected that we have to
 615  * identify. This is used during startup when we don't get
 616  * interrupts of the charger detection
 617  *
 618  * Returns an integer value, that means,
 619  * NO_PW_CONN  no power supply is connected
 620  * AC_PW_CONN  if the AC power supply is connected
 621  * USB_PW_CONN  if the USB power supply is connected
 622  * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
 623  */
 624 static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
 625 {
 626         int result = NO_PW_CONN;
 627         int ret;
 628         u8 val;
 629
 630         /* Check for AC charger */
 631         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 632                 AB8500_CH_STATUS1_REG, &val);
 633         if (ret < 0) {
 634                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 635                 return ret;
 636         }
 637
 638         if (val & MAIN_CH_DET)
 639                 result = AC_PW_CONN;
 640
 641         /* Check for USB charger */
 642
 643         if (!probe) {
 644                 /*
 645                  * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
 646                  * when disconnecting ACA even though no
 647                  * charger was connected. Try waiting a little
 648                  * longer than the 100 ms of VBUS_DET_DBNC100...
 649                  */
 650                 msleep(110);
 651         }
 652         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 653                 AB8500_CH_USBCH_STAT1_REG, &val);
 654         if (ret < 0) {
 655                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 656                 return ret;
 657         }
 658         dev_dbg(di->dev,
 659                 "%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
 660                 val);
 661         if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
 662                 result |= USB_PW_CONN;
 663
 664         return result;
 665 }
 666
 667 /**
 668  * ab8500_charger_max_usb_curr() - get the max curr for the USB type
 669  * @di:                 pointer to the ab8500_charger structure
 670  * @link_status:        the identified USB type
 671  *
 672  * Get the maximum current that is allowed to be drawn from the host
 673  * based on the USB type.
 674  * Returns error code in case of failure else 0 on success
 675  */
 676 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
 677                 enum ab8500_charger_link_status link_status)
 678 {
 679         int ret = 0;
 680
 681         di->usb_device_is_unrecognised = false;
 682
 683         /*
 684          * Platform only supports USB 2.0.
 685          * This means that charging current from USB source
 686          * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_*
 687          * should set USB_CH_IP_CUR_LVL_0P5.
 688          */
 689
 690         switch (link_status) {
 691         case USB_STAT_STD_HOST_NC:
 692         case USB_STAT_STD_HOST_C_NS:
 693         case USB_STAT_STD_HOST_C_S:
 694                 dev_dbg(di->dev, "USB Type - Standard host is "
 695                         "detected through USB driver\n");
 696                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 697                 di->is_aca_rid = 0;
 698                 break;
 699         case USB_STAT_HOST_CHG_HS_CHIRP:
 700                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 701                 di->is_aca_rid = 0;
 702                 break;
 703         case USB_STAT_HOST_CHG_HS:
 704                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 705                 di->is_aca_rid = 0;
 706                 break;
 707         case USB_STAT_ACA_RID_C_HS:
 708                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
 709                 di->is_aca_rid = 0;
 710                 break;
 711         case USB_STAT_ACA_RID_A:
 712                 /*
 713                  * Dedicated charger level minus maximum current accessory
 714                  * can consume (900mA). Closest level is 500mA
 715                  */
 716                 dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
 717                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 718                 di->is_aca_rid = 1;
 719                 break;
 720         case USB_STAT_ACA_RID_B:
 721                 /*
 722                  * Dedicated charger level minus 120mA (20mA for ACA and
 723                  * 100mA for potential accessory). Closest level is 1300mA
 724                  */
 725                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
 726                 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
 727                                 di->max_usb_in_curr.usb_type_max);
 728                 di->is_aca_rid = 1;
 729                 break;
 730         case USB_STAT_HOST_CHG_NM:
 731                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 732                 di->is_aca_rid = 0;
 733                 break;
 734         case USB_STAT_DEDICATED_CHG:
 735                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
 736                 di->is_aca_rid = 0;
 737                 break;
 738         case USB_STAT_ACA_RID_C_HS_CHIRP:
 739         case USB_STAT_ACA_RID_C_NM:
 740                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
 741                 di->is_aca_rid = 1;
 742                 break;
 743         case USB_STAT_NOT_CONFIGURED:
 744                 if (di->vbus_detected) {
 745                         di->usb_device_is_unrecognised = true;
 746                         dev_dbg(di->dev, "USB Type - Legacy charger.\n");
 747                         di->max_usb_in_curr.usb_type_max =
 748                                                 USB_CH_IP_CUR_LVL_1P5;
 749                         break;
 750                 }
 751                 fallthrough;
 752         case USB_STAT_HM_IDGND:
 753                 dev_err(di->dev, "USB Type - Charging not allowed\n");
 754                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
 755                 ret = -ENXIO;
 756                 break;
 757         case USB_STAT_RESERVED:
 758                 if (is_ab8500(di->parent)) {
 759                         di->flags.vbus_collapse = true;
 760                         dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
 761                                                 "VBUS has collapsed\n");
 762                         ret = -ENXIO;
 763                         break;
 764                 } else {
 765                         dev_dbg(di->dev, "USB Type - Charging not allowed\n");
 766                         di->max_usb_in_curr.usb_type_max =
 767                                                 USB_CH_IP_CUR_LVL_0P05;
 768                         dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
 769                                 link_status,
 770                                 di->max_usb_in_curr.usb_type_max);
 771                         ret = -ENXIO;
 772                         break;
 773                 }
 774         case USB_STAT_CARKIT_1:
 775         case USB_STAT_CARKIT_2:
 776         case USB_STAT_ACA_DOCK_CHARGER:
 777         case USB_STAT_CHARGER_LINE_1:
 778                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 779                 dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
 780                                 di->max_usb_in_curr.usb_type_max);
 781                 break;
 782         case USB_STAT_NOT_VALID_LINK:
 783                 dev_err(di->dev, "USB Type invalid - try charging anyway\n");
 784                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
 785                 break;
 786
 787         default:
 788                 dev_err(di->dev, "USB Type - Unknown\n");
 789                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
 790                 ret = -ENXIO;
 791                 break;
 792         }
 793
 794         di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
 795         dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
 796                 link_status, di->max_usb_in_curr.set_max);
 797
 798         return ret;
 799 }
 800
 801 /**
 802  * ab8500_charger_read_usb_type() - read the type of usb connected
 803  * @di:         pointer to the ab8500_charger structure
 804  *
 805  * Detect the type of the plugged USB
 806  * Returns error code in case of failure else 0 on success
 807  */
 808 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
 809 {
 810         int ret;
 811         u8 val;
 812
 813         ret = abx500_get_register_interruptible(di->dev,
 814                 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
 815         if (ret < 0) {
 816                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 817                 return ret;
 818         }
 819         if (is_ab8500(di->parent))
 820                 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
 821                         AB8500_USB_LINE_STAT_REG, &val);
 822         else
 823                 ret = abx500_get_register_interruptible(di->dev,
 824                         AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
 825         if (ret < 0) {
 826                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 827                 return ret;
 828         }
 829
 830         /* get the USB type */
 831         if (is_ab8500(di->parent))
 832                 val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
 833         else
 834                 val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
 835         ret = ab8500_charger_max_usb_curr(di,
 836                 (enum ab8500_charger_link_status) val);
 837
 838         return ret;
 839 }
 840
 841 /**
 842  * ab8500_charger_detect_usb_type() - get the type of usb connected
 843  * @di:         pointer to the ab8500_charger structure
 844  *
 845  * Detect the type of the plugged USB
 846  * Returns error code in case of failure else 0 on success
 847  */
 848 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
 849 {
 850         int i, ret;
 851         u8 val;
 852
 853         /*
 854          * On getting the VBUS rising edge detect interrupt there
 855          * is a 250ms delay after which the register UsbLineStatus
 856          * is filled with valid data.
 857          */
 858         for (i = 0; i < 10; i++) {
 859                 msleep(250);
 860                 ret = abx500_get_register_interruptible(di->dev,
 861                         AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
 862                         &val);
 863                 dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
 864                         __func__, val);
 865                 if (ret < 0) {
 866                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 867                         return ret;
 868                 }
 869
 870                 if (is_ab8500(di->parent))
 871                         ret = abx500_get_register_interruptible(di->dev,
 872                                 AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
 873                 else
 874                         ret = abx500_get_register_interruptible(di->dev,
 875                                 AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
 876                 if (ret < 0) {
 877                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 878                         return ret;
 879                 }
 880                 dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
 881                         val);
 882                 /*
 883                  * Until the IT source register is read the UsbLineStatus
 884                  * register is not updated, hence doing the same
 885                  * Revisit this:
 886                  */
 887
 888                 /* get the USB type */
 889                 if (is_ab8500(di->parent))
 890                         val = (val & AB8500_USB_LINK_STATUS) >>
 891                                                         USB_LINK_STATUS_SHIFT;
 892                 else
 893                         val = (val & AB8505_USB_LINK_STATUS) >>
 894                                                         USB_LINK_STATUS_SHIFT;
 895                 if (val)
 896                         break;
 897         }
 898         ret = ab8500_charger_max_usb_curr(di,
 899                 (enum ab8500_charger_link_status) val);
 900
 901         return ret;
 902 }
 903
 904 /*
 905  * This array maps the raw hex value to charger voltage used by the AB8500
 906  * Values taken from the UM0836
 907  */
 908 static int ab8500_charger_voltage_map[] = {
 909         3500 ,
 910         3525 ,
 911         3550 ,
 912         3575 ,
 913         3600 ,
 914         3625 ,
 915         3650 ,
 916         3675 ,
 917         3700 ,
 918         3725 ,
 919         3750 ,
 920         3775 ,
 921         3800 ,
 922         3825 ,
 923         3850 ,
 924         3875 ,
 925         3900 ,
 926         3925 ,
 927         3950 ,
 928         3975 ,
 929         4000 ,
 930         4025 ,
 931         4050 ,
 932         4060 ,
 933         4070 ,
 934         4080 ,
 935         4090 ,
 936         4100 ,
 937         4110 ,
 938         4120 ,
 939         4130 ,
 940         4140 ,
 941         4150 ,
 942         4160 ,
 943         4170 ,
 944         4180 ,
 945         4190 ,
 946         4200 ,
 947         4210 ,
 948         4220 ,
 949         4230 ,
 950         4240 ,
 951         4250 ,
 952         4260 ,
 953         4270 ,
 954         4280 ,
 955         4290 ,
 956         4300 ,
 957         4310 ,
 958         4320 ,
 959         4330 ,
 960         4340 ,
 961         4350 ,
 962         4360 ,
 963         4370 ,
 964         4380 ,
 965         4390 ,
 966         4400 ,
 967         4410 ,
 968         4420 ,
 969         4430 ,
 970         4440 ,
 971         4450 ,
 972         4460 ,
 973         4470 ,
 974         4480 ,
 975         4490 ,
 976         4500 ,
 977         4510 ,
 978         4520 ,
 979         4530 ,
 980         4540 ,
 981         4550 ,
 982         4560 ,
 983         4570 ,
 984         4580 ,
 985         4590 ,
 986         4600 ,
 987 };
 988
 989 static int ab8500_voltage_to_regval(int voltage)
 990 {
 991         int i;
 992
 993         /* Special case for voltage below 3.5V */
 994         if (voltage < ab8500_charger_voltage_map[0])
 995                 return LOW_VOLT_REG;
 996
 997         for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
 998                 if (voltage < ab8500_charger_voltage_map[i])
 999                         return i - 1;
1000         }
1001
1002         /* If not last element, return error */
1003         i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
1004         if (voltage == ab8500_charger_voltage_map[i])
1005                 return i;
1006         else
1007                 return -1;
1008 }
1009
1010 static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
1011 {
1012         int i;
1013
1014         if (curr < di->bm->chg_output_curr[0])
1015                 return 0;
1016
1017         for (i = 0; i < di->bm->n_chg_out_curr; i++) {
1018                 if (curr < di->bm->chg_output_curr[i])
1019                         return i - 1;
1020         }
1021
1022         /* If not last element, return error */
1023         i = di->bm->n_chg_out_curr - 1;
1024         if (curr == di->bm->chg_output_curr[i])
1025                 return i;
1026         else
1027                 return -1;
1028 }
1029
1030 static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
1031 {
1032         int i;
1033
1034         if (curr < di->bm->chg_input_curr[0])
1035                 return 0;
1036
1037         for (i = 0; i < di->bm->n_chg_in_curr; i++) {
1038                 if (curr < di->bm->chg_input_curr[i])
1039                         return i - 1;
1040         }
1041
1042         /* If not last element, return error */
1043         i = di->bm->n_chg_in_curr - 1;
1044         if (curr == di->bm->chg_input_curr[i])
1045                 return i;
1046         else
1047                 return -1;
1048 }
1049
1050 /**
1051  * ab8500_charger_get_usb_cur() - get usb current
1052  * @di:         pointer to the ab8500_charger structre
1053  *
1054  * The usb stack provides the maximum current that can be drawn from
1055  * the standard usb host. This will be in mA.
1056  * This function converts current in mA to a value that can be written
1057  * to the register. Returns -1 if charging is not allowed
1058  */
1059 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
1060 {
1061         int ret = 0;
1062         switch (di->usb_state.usb_current) {
1063         case 100:
1064                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
1065                 break;
1066         case 200:
1067                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
1068                 break;
1069         case 300:
1070                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
1071                 break;
1072         case 400:
1073                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
1074                 break;
1075         case 500:
1076                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
1077                 break;
1078         default:
1079                 di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
1080                 ret = -EPERM;
1081                 break;
1082         }
1083         di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
1084         return ret;
1085 }
1086
1087 /**
1088  * ab8500_charger_check_continue_stepping() - Check to allow stepping
1089  * @di:         pointer to the ab8500_charger structure
1090  * @reg:        select what charger register to check
1091  *
1092  * Check if current stepping should be allowed to continue.
1093  * Checks if charger source has not collapsed. If it has, further stepping
1094  * is not allowed.
1095  */
1096 static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
1097                                                    int reg)
1098 {
1099         if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
1100                 return !di->flags.vbus_drop_end;
1101         else
1102                 return true;
1103 }
1104
1105 /**
1106  * ab8500_charger_set_current() - set charger current
1107  * @di:         pointer to the ab8500_charger structure
1108  * @ich:        charger current, in mA
1109  * @reg:        select what charger register to set
1110  *
1111  * Set charger current.
1112  * There is no state machine in the AB to step up/down the charger
1113  * current to avoid dips and spikes on MAIN, VBUS and VBAT when
1114  * charging is started. Instead we need to implement
1115  * this charger current step-up/down here.
1116  * Returns error code in case of failure else 0(on success)
1117  */
1118 static int ab8500_charger_set_current(struct ab8500_charger *di,
1119         int ich, int reg)
1120 {
1121         int ret = 0;
1122         int curr_index, prev_curr_index, shift_value, i;
1123         u8 reg_value;
1124         u32 step_udelay;
1125         bool no_stepping = false;
1126
1127         atomic_inc(&di->current_stepping_sessions);
1128
1129         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1130                 reg, &reg_value);
1131         if (ret < 0) {
1132                 dev_err(di->dev, "%s read failed\n", __func__);
1133                 goto exit_set_current;
1134         }
1135
1136         switch (reg) {
1137         case AB8500_MCH_IPT_CURLVL_REG:
1138                 shift_value = MAIN_CH_INPUT_CURR_SHIFT;
1139                 prev_curr_index = (reg_value >> shift_value);
1140                 curr_index = ab8500_current_to_regval(di, ich);
1141                 step_udelay = STEP_UDELAY;
1142                 if (!di->ac.charger_connected)
1143                         no_stepping = true;
1144                 break;
1145         case AB8500_USBCH_IPT_CRNTLVL_REG:
1146                 shift_value = VBUS_IN_CURR_LIM_SHIFT;
1147                 prev_curr_index = (reg_value >> shift_value);
1148                 curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
1149                 step_udelay = STEP_UDELAY * 100;
1150
1151                 if (!di->usb.charger_connected)
1152                         no_stepping = true;
1153                 break;
1154         case AB8500_CH_OPT_CRNTLVL_REG:
1155                 shift_value = 0;
1156                 prev_curr_index = (reg_value >> shift_value);
1157                 curr_index = ab8500_current_to_regval(di, ich);
1158                 step_udelay = STEP_UDELAY;
1159                 if (curr_index && (curr_index - prev_curr_index) > 1)
1160                         step_udelay *= 100;
1161
1162                 if (!di->usb.charger_connected && !di->ac.charger_connected)
1163                         no_stepping = true;
1164
1165                 break;
1166         default:
1167                 dev_err(di->dev, "%s current register not valid\n", __func__);
1168                 ret = -ENXIO;
1169                 goto exit_set_current;
1170         }
1171
1172         if (curr_index < 0) {
1173                 dev_err(di->dev, "requested current limit out-of-range\n");
1174                 ret = -ENXIO;
1175                 goto exit_set_current;
1176         }
1177
1178         /* only update current if it's been changed */
1179         if (prev_curr_index == curr_index) {
1180                 dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
1181                         __func__, reg);
1182                 ret = 0;
1183                 goto exit_set_current;
1184         }
1185
1186         dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
1187                 __func__, ich, reg);
1188
1189         if (no_stepping) {
1190                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1191                                         reg, (u8)curr_index << shift_value);
1192                 if (ret)
1193                         dev_err(di->dev, "%s write failed\n", __func__);
1194         } else if (prev_curr_index > curr_index) {
1195                 for (i = prev_curr_index - 1; i >= curr_index; i--) {
1196                         dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
1197                                 (u8) i << shift_value, reg);
1198                         ret = abx500_set_register_interruptible(di->dev,
1199                                 AB8500_CHARGER, reg, (u8)i << shift_value);
1200                         if (ret) {
1201                                 dev_err(di->dev, "%s write failed\n", __func__);
1202                                 goto exit_set_current;
1203                         }
1204                         if (i != curr_index)
1205                                 usleep_range(step_udelay, step_udelay * 2);
1206                 }
1207         } else {
1208                 bool allow = true;
1209                 for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
1210                         dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
1211                                 (u8)i << shift_value, reg);
1212                         ret = abx500_set_register_interruptible(di->dev,
1213                                 AB8500_CHARGER, reg, (u8)i << shift_value);
1214                         if (ret) {
1215                                 dev_err(di->dev, "%s write failed\n", __func__);
1216                                 goto exit_set_current;
1217                         }
1218                         if (i != curr_index)
1219                                 usleep_range(step_udelay, step_udelay * 2);
1220
1221                         allow = ab8500_charger_check_continue_stepping(di, reg);
1222                 }
1223         }
1224
1225 exit_set_current:
1226         atomic_dec(&di->current_stepping_sessions);
1227
1228         return ret;
1229 }
1230
1231 /**
1232  * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
1233  * @di:         pointer to the ab8500_charger structure
1234  * @ich_in:     charger input current limit
1235  *
1236  * Sets the current that can be drawn from the USB host
1237  * Returns error code in case of failure else 0(on success)
1238  */
1239 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
1240                 int ich_in)
1241 {
1242         int min_value;
1243         int ret;
1244
1245         /* We should always use to lowest current limit */
1246         min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
1247         if (di->max_usb_in_curr.set_max > 0)
1248                 min_value = min(di->max_usb_in_curr.set_max, min_value);
1249
1250         if (di->usb_state.usb_current >= 0)
1251                 min_value = min(di->usb_state.usb_current, min_value);
1252
1253         switch (min_value) {
1254         case 100:
1255                 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1256                         min_value = USB_CH_IP_CUR_LVL_0P05;
1257                 break;
1258         case 500:
1259                 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
1260                         min_value = USB_CH_IP_CUR_LVL_0P45;
1261                 break;
1262         default:
1263                 break;
1264         }
1265
1266         dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);
1267
1268         mutex_lock(&di->usb_ipt_crnt_lock);
1269         ret = ab8500_charger_set_current(di, min_value,
1270                 AB8500_USBCH_IPT_CRNTLVL_REG);
1271         mutex_unlock(&di->usb_ipt_crnt_lock);
1272
1273         return ret;
1274 }
1275
1276 /**
1277  * ab8500_charger_set_main_in_curr() - set main charger input current
1278  * @di:         pointer to the ab8500_charger structure
1279  * @ich_in:     input charger current, in mA
1280  *
1281  * Set main charger input current.
1282  * Returns error code in case of failure else 0(on success)
1283  */
1284 static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
1285         int ich_in)
1286 {
1287         return ab8500_charger_set_current(di, ich_in,
1288                 AB8500_MCH_IPT_CURLVL_REG);
1289 }
1290
1291 /**
1292  * ab8500_charger_set_output_curr() - set charger output current
1293  * @di:         pointer to the ab8500_charger structure
1294  * @ich_out:    output charger current, in mA
1295  *
1296  * Set charger output current.
1297  * Returns error code in case of failure else 0(on success)
1298  */
1299 static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
1300         int ich_out)
1301 {
1302         return ab8500_charger_set_current(di, ich_out,
1303                 AB8500_CH_OPT_CRNTLVL_REG);
1304 }
1305
1306 /**
1307  * ab8500_charger_led_en() - turn on/off chargign led
1308  * @di:         pointer to the ab8500_charger structure
1309  * @on:         flag to turn on/off the chargign led
1310  *
1311  * Power ON/OFF charging LED indication
1312  * Returns error code in case of failure else 0(on success)
1313  */
1314 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
1315 {
1316         int ret;
1317
1318         if (on) {
1319                 /* Power ON charging LED indicator, set LED current to 5mA */
1320                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1321                         AB8500_LED_INDICATOR_PWM_CTRL,
1322                         (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
1323                 if (ret) {
1324                         dev_err(di->dev, "Power ON LED failed\n");
1325                         return ret;
1326                 }
1327                 /* LED indicator PWM duty cycle 252/256 */
1328                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1329                         AB8500_LED_INDICATOR_PWM_DUTY,
1330                         LED_INDICATOR_PWM_DUTY_252_256);
1331                 if (ret) {
1332                         dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1333                         return ret;
1334                 }
1335         } else {
1336                 /* Power off charging LED indicator */
1337                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1338                         AB8500_LED_INDICATOR_PWM_CTRL,
1339                         LED_INDICATOR_PWM_DIS);
1340                 if (ret) {
1341                         dev_err(di->dev, "Power-off LED failed\n");
1342                         return ret;
1343                 }
1344         }
1345
1346         return ret;
1347 }
1348
1349 /**
1350  * ab8500_charger_ac_en() - enable or disable ac charging
1351  * @di:         pointer to the ab8500_charger structure
1352  * @enable:     enable/disable flag
1353  * @vset:       charging voltage
1354  * @iset:       charging current
1355  *
1356  * Enable/Disable AC/Mains charging and turns on/off the charging led
1357  * respectively.
1358  **/
1359 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1360         int enable, int vset, int iset)
1361 {
1362         int ret;
1363         int volt_index;
1364         int curr_index;
1365         int input_curr_index;
1366         u8 overshoot = 0;
1367
1368         struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1369
1370         if (enable) {
1371                 /* Check if AC is connected */
1372                 if (!di->ac.charger_connected) {
1373                         dev_err(di->dev, "AC charger not connected\n");
1374                         return -ENXIO;
1375                 }
1376
1377                 /* Enable AC charging */
1378                 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1379
1380                 /*
1381                  * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1382                  * will be triggered every time we enable the VDD ADC supply.
1383                  * This will turn off charging for a short while.
1384                  * It can be avoided by having the supply on when
1385                  * there is a charger enabled. Normally the VDD ADC supply
1386                  * is enabled every time a GPADC conversion is triggered.
1387                  * We will force it to be enabled from this driver to have
1388                  * the GPADC module independent of the AB8500 chargers
1389                  */
1390                 if (!di->vddadc_en_ac) {
1391                         ret = regulator_enable(di->regu);
1392                         if (ret)
1393                                 dev_warn(di->dev,
1394                                         "Failed to enable regulator\n");
1395                         else
1396                                 di->vddadc_en_ac = true;
1397                 }
1398
1399                 /* Check if the requested voltage or current is valid */
1400                 volt_index = ab8500_voltage_to_regval(vset);
1401                 curr_index = ab8500_current_to_regval(di, iset);
1402                 input_curr_index = ab8500_current_to_regval(di,
1403                         di->bm->chg_params->ac_curr_max);
1404                 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1405                         dev_err(di->dev,
1406                                 "Charger voltage or current too high, "
1407                                 "charging not started\n");
1408                         return -ENXIO;
1409                 }
1410
1411                 /* ChVoltLevel: maximum battery charging voltage */
1412                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1413                         AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1414                 if (ret) {
1415                         dev_err(di->dev, "%s write failed\n", __func__);
1416                         return ret;
1417                 }
1418                 /* MainChInputCurr: current that can be drawn from the charger*/
1419                 ret = ab8500_charger_set_main_in_curr(di,
1420                         di->bm->chg_params->ac_curr_max);
1421                 if (ret) {
1422                         dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
1423                                 __func__);
1424                         return ret;
1425                 }
1426                 /* ChOutputCurentLevel: protected output current */
1427                 ret = ab8500_charger_set_output_curr(di, iset);
1428                 if (ret) {
1429                         dev_err(di->dev, "%s "
1430                                 "Failed to set ChOutputCurentLevel\n",
1431                                 __func__);
1432                         return ret;
1433                 }
1434
1435                 /* Check if VBAT overshoot control should be enabled */
1436                 if (!di->bm->enable_overshoot)
1437                         overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1438
1439                 /* Enable Main Charger */
1440                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1441                         AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1442                 if (ret) {
1443                         dev_err(di->dev, "%s write failed\n", __func__);
1444                         return ret;
1445                 }
1446
1447                 /* Power on charging LED indication */
1448                 ret = ab8500_charger_led_en(di, true);
1449                 if (ret < 0)
1450                         dev_err(di->dev, "failed to enable LED\n");
1451
1452                 di->ac.charger_online = 1;
1453         } else {
1454                 /* Disable AC charging */
1455                 if (is_ab8500_1p1_or_earlier(di->parent)) {
1456                         /*
1457                          * For ABB revision 1.0 and 1.1 there is a bug in the
1458                          * watchdog logic. That means we have to continuously
1459                          * kick the charger watchdog even when no charger is
1460                          * connected. This is only valid once the AC charger
1461                          * has been enabled. This is a bug that is not handled
1462                          * by the algorithm and the watchdog have to be kicked
1463                          * by the charger driver when the AC charger
1464                          * is disabled
1465                          */
1466                         if (di->ac_conn) {
1467                                 queue_delayed_work(di->charger_wq,
1468                                         &di->kick_wd_work,
1469                                         round_jiffies(WD_KICK_INTERVAL));
1470                         }
1471
1472                         /*
1473                          * We can't turn off charging completely
1474                          * due to a bug in AB8500 cut1.
1475                          * If we do, charging will not start again.
1476                          * That is why we set the lowest voltage
1477                          * and current possible
1478                          */
1479                         ret = abx500_set_register_interruptible(di->dev,
1480                                 AB8500_CHARGER,
1481                                 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1482                         if (ret) {
1483                                 dev_err(di->dev,
1484                                         "%s write failed\n", __func__);
1485                                 return ret;
1486                         }
1487
1488                         ret = ab8500_charger_set_output_curr(di, 0);
1489                         if (ret) {
1490                                 dev_err(di->dev, "%s "
1491                                         "Failed to set ChOutputCurentLevel\n",
1492                                         __func__);
1493                                 return ret;
1494                         }
1495                 } else {
1496                         ret = abx500_set_register_interruptible(di->dev,
1497                                 AB8500_CHARGER,
1498                                 AB8500_MCH_CTRL1, 0);
1499                         if (ret) {
1500                                 dev_err(di->dev,
1501                                         "%s write failed\n", __func__);
1502                                 return ret;
1503                         }
1504                 }
1505
1506                 ret = ab8500_charger_led_en(di, false);
1507                 if (ret < 0)
1508                         dev_err(di->dev, "failed to disable LED\n");
1509
1510                 di->ac.charger_online = 0;
1511                 di->ac.wd_expired = false;
1512
1513                 /* Disable regulator if enabled */
1514                 if (di->vddadc_en_ac) {
1515                         regulator_disable(di->regu);
1516                         di->vddadc_en_ac = false;
1517                 }
1518
1519                 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1520         }
1521         ab8500_power_supply_changed(di, di->ac_chg.psy);
1522
1523         return ret;
1524 }
1525
1526 /**
1527  * ab8500_charger_usb_en() - enable usb charging
1528  * @di:         pointer to the ab8500_charger structure
1529  * @enable:     enable/disable flag
1530  * @vset:       charging voltage
1531  * @ich_out:    charger output current
1532  *
1533  * Enable/Disable USB charging and turns on/off the charging led respectively.
1534  * Returns error code in case of failure else 0(on success)
1535  */
1536 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1537         int enable, int vset, int ich_out)
1538 {
1539         int ret;
1540         int volt_index;
1541         int curr_index;
1542         u8 overshoot = 0;
1543
1544         struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1545
1546         if (enable) {
1547                 /* Check if USB is connected */
1548                 if (!di->usb.charger_connected) {
1549                         dev_err(di->dev, "USB charger not connected\n");
1550                         return -ENXIO;
1551                 }
1552
1553                 /*
1554                  * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1555                  * will be triggered every time we enable the VDD ADC supply.
1556                  * This will turn off charging for a short while.
1557                  * It can be avoided by having the supply on when
1558                  * there is a charger enabled. Normally the VDD ADC supply
1559                  * is enabled every time a GPADC conversion is triggered.
1560                  * We will force it to be enabled from this driver to have
1561                  * the GPADC module independent of the AB8500 chargers
1562                  */
1563                 if (!di->vddadc_en_usb) {
1564                         ret = regulator_enable(di->regu);
1565                         if (ret)
1566                                 dev_warn(di->dev,
1567                                         "Failed to enable regulator\n");
1568                         else
1569                                 di->vddadc_en_usb = true;
1570                 }
1571
1572                 /* Enable USB charging */
1573                 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1574
1575                 /* Check if the requested voltage or current is valid */
1576                 volt_index = ab8500_voltage_to_regval(vset);
1577                 curr_index = ab8500_current_to_regval(di, ich_out);
1578                 if (volt_index < 0 || curr_index < 0) {
1579                         dev_err(di->dev,
1580                                 "Charger voltage or current too high, "
1581                                 "charging not started\n");
1582                         return -ENXIO;
1583                 }
1584
1585                 /*
1586                  * ChVoltLevel: max voltage up to which battery can be
1587                  * charged
1588                  */
1589                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1590                         AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1591                 if (ret) {
1592                         dev_err(di->dev, "%s write failed\n", __func__);
1593                         return ret;
1594                 }
1595                 /* Check if VBAT overshoot control should be enabled */
1596                 if (!di->bm->enable_overshoot)
1597                         overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1598
1599                 /* Enable USB Charger */
1600                 dev_dbg(di->dev,
1601                         "Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
1602                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1603                         AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1604                 if (ret) {
1605                         dev_err(di->dev, "%s write failed\n", __func__);
1606                         return ret;
1607                 }
1608
1609                 /* If success power on charging LED indication */
1610                 ret = ab8500_charger_led_en(di, true);
1611                 if (ret < 0)
1612                         dev_err(di->dev, "failed to enable LED\n");
1613
1614                 di->usb.charger_online = 1;
1615
1616                 /* USBChInputCurr: current that can be drawn from the usb */
1617                 ret = ab8500_charger_set_vbus_in_curr(di,
1618                                         di->max_usb_in_curr.usb_type_max);
1619                 if (ret) {
1620                         dev_err(di->dev, "setting USBChInputCurr failed\n");
1621                         return ret;
1622                 }
1623
1624                 /* ChOutputCurentLevel: protected output current */
1625                 ret = ab8500_charger_set_output_curr(di, ich_out);
1626                 if (ret) {
1627                         dev_err(di->dev, "%s "
1628                                 "Failed to set ChOutputCurentLevel\n",
1629                                 __func__);
1630                         return ret;
1631                 }
1632
1633                 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1634
1635         } else {
1636                 /* Disable USB charging */
1637                 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1638                 ret = abx500_set_register_interruptible(di->dev,
1639                         AB8500_CHARGER,
1640                         AB8500_USBCH_CTRL1_REG, 0);
1641                 if (ret) {
1642                         dev_err(di->dev,
1643                                 "%s write failed\n", __func__);
1644                         return ret;
1645                 }
1646
1647                 ret = ab8500_charger_led_en(di, false);
1648                 if (ret < 0)
1649                         dev_err(di->dev, "failed to disable LED\n");
1650                 /* USBChInputCurr: current that can be drawn from the usb */
1651                 ret = ab8500_charger_set_vbus_in_curr(di, 0);
1652                 if (ret) {
1653                         dev_err(di->dev, "setting USBChInputCurr failed\n");
1654                         return ret;
1655                 }
1656
1657                 /* ChOutputCurentLevel: protected output current */
1658                 ret = ab8500_charger_set_output_curr(di, 0);
1659                 if (ret) {
1660                         dev_err(di->dev, "%s "
1661                                 "Failed to reset ChOutputCurentLevel\n",
1662                                 __func__);
1663                         return ret;
1664                 }
1665                 di->usb.charger_online = 0;
1666                 di->usb.wd_expired = false;
1667
1668                 /* Disable regulator if enabled */
1669                 if (di->vddadc_en_usb) {
1670                         regulator_disable(di->regu);
1671                         di->vddadc_en_usb = false;
1672                 }
1673
1674                 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1675
1676                 /* Cancel any pending Vbat check work */
1677                 cancel_delayed_work(&di->check_vbat_work);
1678
1679         }
1680         ab8500_power_supply_changed(di, di->usb_chg.psy);
1681
1682         return ret;
1683 }
1684
1685 static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
1686                                 unsigned long event, void *data)
1687 {
1688         int ret;
1689         struct device *dev = data;
1690         /*Toggle External charger control pin*/
1691         ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1692                                   AB8500_SYS_CHARGER_CONTROL_REG,
1693                                   EXTERNAL_CHARGER_DISABLE_REG_VAL);
1694         if (ret < 0) {
1695                 dev_err(dev, "write reg failed %d\n", ret);
1696                 goto out;
1697         }
1698         ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
1699                                   AB8500_SYS_CHARGER_CONTROL_REG,
1700                                   EXTERNAL_CHARGER_ENABLE_REG_VAL);
1701         if (ret < 0)
1702                 dev_err(dev, "Write reg failed %d\n", ret);
1703
1704 out:
1705         return ret;
1706 }
1707
1708 /**
1709  * ab8500_charger_usb_check_enable() - enable usb charging
1710  * @charger:    pointer to the ux500_charger structure
1711  * @vset:       charging voltage
1712  * @iset:       charger output current
1713  *
1714  * Check if the VBUS charger has been disconnected and reconnected without
1715  * AB8500 rising an interrupt. Returns 0 on success.
1716  */
1717 static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
1718         int vset, int iset)
1719 {
1720         u8 usbch_ctrl1 = 0;
1721         int ret = 0;
1722
1723         struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1724
1725         if (!di->usb.charger_connected)
1726                 return ret;
1727
1728         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1729                                 AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
1730         if (ret < 0) {
1731                 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1732                 return ret;
1733         }
1734         dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);
1735
1736         if (!(usbch_ctrl1 & USB_CH_ENA)) {
1737                 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1738
1739                 ret = abx500_mask_and_set_register_interruptible(di->dev,
1740                                         AB8500_CHARGER, AB8500_CHARGER_CTRL,
1741                                         DROP_COUNT_RESET, DROP_COUNT_RESET);
1742                 if (ret < 0) {
1743                         dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1744                         return ret;
1745                 }
1746
1747                 ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
1748                 if (ret < 0) {
1749                         dev_err(di->dev, "Failed to enable VBUS charger %d\n",
1750                                         __LINE__);
1751                         return ret;
1752                 }
1753         }
1754         return ret;
1755 }
1756
1757 /**
1758  * ab8500_charger_ac_check_enable() - enable usb charging
1759  * @charger:    pointer to the ux500_charger structure
1760  * @vset:       charging voltage
1761  * @iset:       charger output current
1762  *
1763  * Check if the AC charger has been disconnected and reconnected without
1764  * AB8500 rising an interrupt. Returns 0 on success.
1765  */
1766 static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
1767         int vset, int iset)
1768 {
1769         u8 mainch_ctrl1 = 0;
1770         int ret = 0;
1771
1772         struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1773
1774         if (!di->ac.charger_connected)
1775                 return ret;
1776
1777         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
1778                                 AB8500_MCH_CTRL1, &mainch_ctrl1);
1779         if (ret < 0) {
1780                 dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
1781                 return ret;
1782         }
1783         dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);
1784
1785         if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
1786                 dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");
1787
1788                 ret = abx500_mask_and_set_register_interruptible(di->dev,
1789                                         AB8500_CHARGER, AB8500_CHARGER_CTRL,
1790                                         DROP_COUNT_RESET, DROP_COUNT_RESET);
1791
1792                 if (ret < 0) {
1793                         dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
1794                         return ret;
1795                 }
1796
1797                 ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
1798                 if (ret < 0) {
1799                         dev_err(di->dev, "failed to enable AC charger %d\n",
1800                                 __LINE__);
1801                         return ret;
1802                 }
1803         }
1804         return ret;
1805 }
1806
1807 /**
1808  * ab8500_charger_watchdog_kick() - kick charger watchdog
1809  * @di:         pointer to the ab8500_charger structure
1810  *
1811  * Kick charger watchdog
1812  * Returns error code in case of failure else 0(on success)
1813  */
1814 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1815 {
1816         int ret;
1817         struct ab8500_charger *di;
1818
1819         if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1820                 di = to_ab8500_charger_ac_device_info(charger);
1821         else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1822                 di = to_ab8500_charger_usb_device_info(charger);
1823         else
1824                 return -ENXIO;
1825
1826         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1827                 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1828         if (ret)
1829                 dev_err(di->dev, "Failed to kick WD!\n");
1830
1831         return ret;
1832 }
1833
1834 /**
1835  * ab8500_charger_update_charger_current() - update charger current
1836  * @di:         pointer to the ab8500_charger structure
1837  *
1838  * Update the charger output current for the specified charger
1839  * Returns error code in case of failure else 0(on success)
1840  */
1841 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1842                 int ich_out)
1843 {
1844         int ret;
1845         struct ab8500_charger *di;
1846
1847         if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
1848                 di = to_ab8500_charger_ac_device_info(charger);
1849         else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
1850                 di = to_ab8500_charger_usb_device_info(charger);
1851         else
1852                 return -ENXIO;
1853
1854         ret = ab8500_charger_set_output_curr(di, ich_out);
1855         if (ret) {
1856                 dev_err(di->dev, "%s "
1857                         "Failed to set ChOutputCurentLevel\n",
1858                         __func__);
1859                 return ret;
1860         }
1861
1862         /* Reset the main and usb drop input current measurement counter */
1863         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1864                                 AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
1865         if (ret) {
1866                 dev_err(di->dev, "%s write failed\n", __func__);
1867                 return ret;
1868         }
1869
1870         return ret;
1871 }
1872
1873 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1874 {
1875         struct power_supply *psy;
1876         struct power_supply *ext = dev_get_drvdata(dev);
1877         const char **supplicants = (const char **)ext->supplied_to;
1878         struct ab8500_charger *di;
1879         union power_supply_propval ret;
1880         int j;
1881         struct ux500_charger *usb_chg;
1882
1883         usb_chg = (struct ux500_charger *)data;
1884         psy = usb_chg->psy;
1885
1886         di = to_ab8500_charger_usb_device_info(usb_chg);
1887
1888         /* For all psy where the driver name appears in any supplied_to */
1889         j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
1890         if (j < 0)
1891                 return 0;
1892
1893         /* Go through all properties for the psy */
1894         for (j = 0; j < ext->desc->num_properties; j++) {
1895                 enum power_supply_property prop;
1896                 prop = ext->desc->properties[j];
1897
1898                 if (power_supply_get_property(ext, prop, &ret))
1899                         continue;
1900
1901                 switch (prop) {
1902                 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1903                         switch (ext->desc->type) {
1904                         case POWER_SUPPLY_TYPE_BATTERY:
1905                                 di->vbat = ret.intval / 1000;
1906                                 break;
1907                         default:
1908                                 break;
1909                         }
1910                         break;
1911                 default:
1912                         break;
1913                 }
1914         }
1915         return 0;
1916 }
1917
1918 /**
1919  * ab8500_charger_check_vbat_work() - keep vbus current within spec
1920  * @work        pointer to the work_struct structure
1921  *
1922  * Due to a asic bug it is necessary to lower the input current to the vbus
1923  * charger when charging with at some specific levels. This issue is only valid
1924  * for below a certain battery voltage. This function makes sure that the
1925  * the allowed current limit isn't exceeded.
1926  */
1927 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1928 {
1929         int t = 10;
1930         struct ab8500_charger *di = container_of(work,
1931                 struct ab8500_charger, check_vbat_work.work);
1932
1933         class_for_each_device(power_supply_class, NULL,
1934                 di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1935
1936         /* First run old_vbat is 0. */
1937         if (di->old_vbat == 0)
1938                 di->old_vbat = di->vbat;
1939
1940         if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1941                 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1942                 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1943                 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1944
1945                 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1946                         " old: %d\n", di->max_usb_in_curr.usb_type_max,
1947                         di->vbat, di->old_vbat);
1948                 ab8500_charger_set_vbus_in_curr(di,
1949                                         di->max_usb_in_curr.usb_type_max);
1950                 power_supply_changed(di->usb_chg.psy);
1951         }
1952
1953         di->old_vbat = di->vbat;
1954
1955         /*
1956          * No need to check the battery voltage every second when not close to
1957          * the threshold.
1958          */
1959         if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1960                 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1961                         t = 1;
1962
1963         queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1964 }
1965
1966 /**
1967  * ab8500_charger_check_hw_failure_work() - check main charger failure
1968  * @work:       pointer to the work_struct structure
1969  *
1970  * Work queue function for checking the main charger status
1971  */
1972 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1973 {
1974         int ret;
1975         u8 reg_value;
1976
1977         struct ab8500_charger *di = container_of(work,
1978                 struct ab8500_charger, check_hw_failure_work.work);
1979
1980         /* Check if the status bits for HW failure is still active */
1981         if (di->flags.mainextchnotok) {
1982                 ret = abx500_get_register_interruptible(di->dev,
1983                         AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1984                 if (ret < 0) {
1985                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1986                         return;
1987                 }
1988                 if (!(reg_value & MAIN_CH_NOK)) {
1989                         di->flags.mainextchnotok = false;
1990                         ab8500_power_supply_changed(di, di->ac_chg.psy);
1991                 }
1992         }
1993         if (di->flags.vbus_ovv) {
1994                 ret = abx500_get_register_interruptible(di->dev,
1995                         AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
1996                         &reg_value);
1997                 if (ret < 0) {
1998                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1999                         return;
2000                 }
2001                 if (!(reg_value & VBUS_OVV_TH)) {
2002                         di->flags.vbus_ovv = false;
2003                         ab8500_power_supply_changed(di, di->usb_chg.psy);
2004                 }
2005         }
2006         /* If we still have a failure, schedule a new check */
2007         if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2008                 queue_delayed_work(di->charger_wq,
2009                         &di->check_hw_failure_work, round_jiffies(HZ));
2010         }
2011 }
2012
2013 /**
2014  * ab8500_charger_kick_watchdog_work() - kick the watchdog
2015  * @work:       pointer to the work_struct structure
2016  *
2017  * Work queue function for kicking the charger watchdog.
2018  *
2019  * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2020  * logic. That means we have to continuously kick the charger
2021  * watchdog even when no charger is connected. This is only
2022  * valid once the AC charger has been enabled. This is
2023  * a bug that is not handled by the algorithm and the
2024  * watchdog have to be kicked by the charger driver
2025  * when the AC charger is disabled
2026  */
2027 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
2028 {
2029         int ret;
2030
2031         struct ab8500_charger *di = container_of(work,
2032                 struct ab8500_charger, kick_wd_work.work);
2033
2034         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2035                 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2036         if (ret)
2037                 dev_err(di->dev, "Failed to kick WD!\n");
2038
2039         /* Schedule a new watchdog kick */
2040         queue_delayed_work(di->charger_wq,
2041                 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
2042 }
2043
2044 /**
2045  * ab8500_charger_ac_work() - work to get and set main charger status
2046  * @work:       pointer to the work_struct structure
2047  *
2048  * Work queue function for checking the main charger status
2049  */
2050 static void ab8500_charger_ac_work(struct work_struct *work)
2051 {
2052         int ret;
2053
2054         struct ab8500_charger *di = container_of(work,
2055                 struct ab8500_charger, ac_work);
2056
2057         /*
2058          * Since we can't be sure that the events are received
2059          * synchronously, we have the check if the main charger is
2060          * connected by reading the status register
2061          */
2062         ret = ab8500_charger_detect_chargers(di, false);
2063         if (ret < 0)
2064                 return;
2065
2066         if (ret & AC_PW_CONN) {
2067                 di->ac.charger_connected = 1;
2068                 di->ac_conn = true;
2069         } else {
2070                 di->ac.charger_connected = 0;
2071         }
2072
2073         ab8500_power_supply_changed(di, di->ac_chg.psy);
2074         sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
2075 }
2076
2077 static void ab8500_charger_usb_attached_work(struct work_struct *work)
2078 {
2079         struct ab8500_charger *di = container_of(work,
2080                                                  struct ab8500_charger,
2081                                                  usb_charger_attached_work.work);
2082         int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
2083         int ret, i;
2084         u8 statval;
2085
2086         for (i = 0; i < 10; i++) {
2087                 ret = abx500_get_register_interruptible(di->dev,
2088                                                         AB8500_CHARGER,
2089                                                         AB8500_CH_USBCH_STAT1_REG,
2090                                                         &statval);
2091                 if (ret < 0) {
2092                         dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2093                         goto reschedule;
2094                 }
2095                 if ((statval & usbch) != usbch)
2096                         goto reschedule;
2097
2098                 msleep(CHARGER_STATUS_POLL);
2099         }
2100
2101         ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
2102
2103         mutex_lock(&di->charger_attached_mutex);
2104         mutex_unlock(&di->charger_attached_mutex);
2105
2106         return;
2107
2108 reschedule:
2109         queue_delayed_work(di->charger_wq,
2110                            &di->usb_charger_attached_work,
2111                            HZ);
2112 }
2113
2114 static void ab8500_charger_ac_attached_work(struct work_struct *work)
2115 {
2116
2117         struct ab8500_charger *di = container_of(work,
2118                                                  struct ab8500_charger,
2119                                                  ac_charger_attached_work.work);
2120         int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
2121                       MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
2122         int ret, i;
2123         u8 statval;
2124
2125         for (i = 0; i < 10; i++) {
2126                 ret = abx500_get_register_interruptible(di->dev,
2127                                                         AB8500_CHARGER,
2128                                                         AB8500_CH_STATUS2_REG,
2129                                                         &statval);
2130                 if (ret < 0) {
2131                         dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
2132                         goto reschedule;
2133                 }
2134
2135                 if ((statval & mainch) != mainch)
2136                         goto reschedule;
2137
2138                 msleep(CHARGER_STATUS_POLL);
2139         }
2140
2141         ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
2142         queue_work(di->charger_wq, &di->ac_work);
2143
2144         mutex_lock(&di->charger_attached_mutex);
2145         mutex_unlock(&di->charger_attached_mutex);
2146
2147         return;
2148
2149 reschedule:
2150         queue_delayed_work(di->charger_wq,
2151                            &di->ac_charger_attached_work,
2152                            HZ);
2153 }
2154
2155 /**
2156  * ab8500_charger_detect_usb_type_work() - work to detect USB type
2157  * @work:       Pointer to the work_struct structure
2158  *
2159  * Detect the type of USB plugged
2160  */
2161 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
2162 {
2163         int ret;
2164
2165         struct ab8500_charger *di = container_of(work,
2166                 struct ab8500_charger, detect_usb_type_work);
2167
2168         /*
2169          * Since we can't be sure that the events are received
2170          * synchronously, we have the check if is
2171          * connected by reading the status register
2172          */
2173         ret = ab8500_charger_detect_chargers(di, false);
2174         if (ret < 0)
2175                 return;
2176
2177         if (!(ret & USB_PW_CONN)) {
2178                 dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
2179                 di->vbus_detected = false;
2180                 ab8500_charger_set_usb_connected(di, false);
2181                 ab8500_power_supply_changed(di, di->usb_chg.psy);
2182         } else {
2183                 dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
2184                 di->vbus_detected = true;
2185
2186                 if (is_ab8500_1p1_or_earlier(di->parent)) {
2187                         ret = ab8500_charger_detect_usb_type(di);
2188                         if (!ret) {
2189                                 ab8500_charger_set_usb_connected(di, true);
2190                                 ab8500_power_supply_changed(di,
2191                                                             di->usb_chg.psy);
2192                         }
2193                 } else {
2194                         /*
2195                          * For ABB cut2.0 and onwards we have an IRQ,
2196                          * USB_LINK_STATUS that will be triggered when the USB
2197                          * link status changes. The exception is USB connected
2198                          * during startup. Then we don't get a
2199                          * USB_LINK_STATUS IRQ
2200                          */
2201                         if (di->vbus_detected_start) {
2202                                 di->vbus_detected_start = false;
2203                                 ret = ab8500_charger_detect_usb_type(di);
2204                                 if (!ret) {
2205                                         ab8500_charger_set_usb_connected(di,
2206                                                 true);
2207                                         ab8500_power_supply_changed(di,
2208                                                 di->usb_chg.psy);
2209                                 }
2210                         }
2211                 }
2212         }
2213 }
2214
2215 /**
2216  * ab8500_charger_usb_link_attach_work() - work to detect USB type
2217  * @work:       pointer to the work_struct structure
2218  *
2219  * Detect the type of USB plugged
2220  */
2221 static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
2222 {
2223         struct ab8500_charger *di =
2224                 container_of(work, struct ab8500_charger, attach_work.work);
2225         int ret;
2226
2227         /* Update maximum input current if USB enumeration is not detected */
2228         if (!di->usb.charger_online) {
2229                 ret = ab8500_charger_set_vbus_in_curr(di,
2230                                         di->max_usb_in_curr.usb_type_max);
2231                 if (ret)
2232                         return;
2233         }
2234
2235         ab8500_charger_set_usb_connected(di, true);
2236         ab8500_power_supply_changed(di, di->usb_chg.psy);
2237 }
2238
2239 /**
2240  * ab8500_charger_usb_link_status_work() - work to detect USB type
2241  * @work:       pointer to the work_struct structure
2242  *
2243  * Detect the type of USB plugged
2244  */
2245 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
2246 {
2247         int detected_chargers;
2248         int ret;
2249         u8 val;
2250         u8 link_status;
2251
2252         struct ab8500_charger *di = container_of(work,
2253                 struct ab8500_charger, usb_link_status_work);
2254
2255         /*
2256          * Since we can't be sure that the events are received
2257          * synchronously, we have the check if  is
2258          * connected by reading the status register
2259          */
2260         detected_chargers = ab8500_charger_detect_chargers(di, false);
2261         if (detected_chargers < 0)
2262                 return;
2263
2264         /*
2265          * Some chargers that breaks the USB spec is
2266          * identified as invalid by AB8500 and it refuse
2267          * to start the charging process. but by jumping
2268          * through a few hoops it can be forced to start.
2269          */
2270         if (is_ab8500(di->parent))
2271                 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2272                                         AB8500_USB_LINE_STAT_REG, &val);
2273         else
2274                 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
2275                                         AB8500_USB_LINK1_STAT_REG, &val);
2276
2277         if (ret >= 0)
2278                 dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
2279         else
2280                 dev_dbg(di->dev, "Error reading USB link status\n");
2281
2282         if (is_ab8500(di->parent))
2283                 link_status = AB8500_USB_LINK_STATUS;
2284         else
2285                 link_status = AB8505_USB_LINK_STATUS;
2286
2287         if (detected_chargers & USB_PW_CONN) {
2288                 if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
2289                                 USB_STAT_NOT_VALID_LINK &&
2290                                 di->invalid_charger_detect_state == 0) {
2291                         dev_dbg(di->dev,
2292                                         "Invalid charger detected, state= 0\n");
2293                         /*Enable charger*/
2294                         abx500_mask_and_set_register_interruptible(di->dev,
2295                                         AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
2296                                         USB_CH_ENA, USB_CH_ENA);
2297                         /*Enable charger detection*/
2298                         abx500_mask_and_set_register_interruptible(di->dev,
2299                                         AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2300                                         USB_CH_DET, USB_CH_DET);
2301                         di->invalid_charger_detect_state = 1;
2302                         /*exit and wait for new link status interrupt.*/
2303                         return;
2304
2305                 }
2306                 if (di->invalid_charger_detect_state == 1) {
2307                         dev_dbg(di->dev,
2308                                         "Invalid charger detected, state= 1\n");
2309                         /*Stop charger detection*/
2310                         abx500_mask_and_set_register_interruptible(di->dev,
2311                                         AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
2312                                         USB_CH_DET, 0x00);
2313                         /*Check link status*/
2314                         if (is_ab8500(di->parent))
2315                                 ret = abx500_get_register_interruptible(di->dev,
2316                                         AB8500_USB, AB8500_USB_LINE_STAT_REG,
2317                                         &val);
2318                         else
2319                                 ret = abx500_get_register_interruptible(di->dev,
2320                                         AB8500_USB, AB8500_USB_LINK1_STAT_REG,
2321                                         &val);
2322
2323                         dev_dbg(di->dev, "USB link status= 0x%02x\n",
2324                                 (val & link_status) >> USB_LINK_STATUS_SHIFT);
2325                         di->invalid_charger_detect_state = 2;
2326                 }
2327         } else {
2328                 di->invalid_charger_detect_state = 0;
2329         }
2330
2331         if (!(detected_chargers & USB_PW_CONN)) {
2332                 di->vbus_detected = false;
2333                 ab8500_charger_set_usb_connected(di, false);
2334                 ab8500_power_supply_changed(di, di->usb_chg.psy);
2335                 return;
2336         }
2337
2338         dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
2339         di->vbus_detected = true;
2340         ret = ab8500_charger_read_usb_type(di);
2341         if (ret) {
2342                 if (ret == -ENXIO) {
2343                         /* No valid charger type detected */
2344                         ab8500_charger_set_usb_connected(di, false);
2345                         ab8500_power_supply_changed(di, di->usb_chg.psy);
2346                 }
2347                 return;
2348         }
2349
2350         if (di->usb_device_is_unrecognised) {
2351                 dev_dbg(di->dev,
2352                         "Potential Legacy Charger device. "
2353                         "Delay work for %d msec for USB enum "
2354                         "to finish",
2355                         WAIT_ACA_RID_ENUMERATION);
2356                 queue_delayed_work(di->charger_wq,
2357                                    &di->attach_work,
2358                                    msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2359         } else if (di->is_aca_rid == 1) {
2360                 /* Only wait once */
2361                 di->is_aca_rid++;
2362                 dev_dbg(di->dev,
2363                         "%s Wait %d msec for USB enum to finish",
2364                         __func__, WAIT_ACA_RID_ENUMERATION);
2365                 queue_delayed_work(di->charger_wq,
2366                                    &di->attach_work,
2367                                    msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
2368         } else {
2369                 queue_delayed_work(di->charger_wq,
2370                                    &di->attach_work,
2371                                    0);
2372         }
2373 }
2374
2375 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
2376 {
2377         int ret;
2378         unsigned long flags;
2379
2380         struct ab8500_charger *di = container_of(work,
2381                 struct ab8500_charger, usb_state_changed_work.work);
2382
2383         if (!di->vbus_detected) {
2384                 dev_dbg(di->dev,
2385                         "%s !di->vbus_detected\n",
2386                         __func__);
2387                 return;
2388         }
2389
2390         spin_lock_irqsave(&di->usb_state.usb_lock, flags);
2391         di->usb_state.state = di->usb_state.state_tmp;
2392         di->usb_state.usb_current = di->usb_state.usb_current_tmp;
2393         spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
2394
2395         dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
2396                 __func__, di->usb_state.state, di->usb_state.usb_current);
2397
2398         switch (di->usb_state.state) {
2399         case AB8500_BM_USB_STATE_RESET_HS:
2400         case AB8500_BM_USB_STATE_RESET_FS:
2401         case AB8500_BM_USB_STATE_SUSPEND:
2402         case AB8500_BM_USB_STATE_MAX:
2403                 ab8500_charger_set_usb_connected(di, false);
2404                 ab8500_power_supply_changed(di, di->usb_chg.psy);
2405                 break;
2406
2407         case AB8500_BM_USB_STATE_RESUME:
2408                 /*
2409                  * when suspend->resume there should be delay
2410                  * of 1sec for enabling charging
2411                  */
2412                 msleep(1000);
2413                 fallthrough;
2414         case AB8500_BM_USB_STATE_CONFIGURED:
2415                 /*
2416                  * USB is configured, enable charging with the charging
2417                  * input current obtained from USB driver
2418                  */
2419                 if (!ab8500_charger_get_usb_cur(di)) {
2420                         /* Update maximum input current */
2421                         ret = ab8500_charger_set_vbus_in_curr(di,
2422                                         di->max_usb_in_curr.usb_type_max);
2423                         if (ret)
2424                                 return;
2425
2426                         ab8500_charger_set_usb_connected(di, true);
2427                         ab8500_power_supply_changed(di, di->usb_chg.psy);
2428                 }
2429                 break;
2430
2431         default:
2432                 break;
2433         }
2434 }
2435
2436 /**
2437  * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
2438  * @work:       pointer to the work_struct structure
2439  *
2440  * Work queue function for checking the USB charger Not OK status
2441  */
2442 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
2443 {
2444         int ret;
2445         u8 reg_value;
2446         bool prev_status;
2447
2448         struct ab8500_charger *di = container_of(work,
2449                 struct ab8500_charger, check_usbchgnotok_work.work);
2450
2451         /* Check if the status bit for usbchargernotok is still active */
2452         ret = abx500_get_register_interruptible(di->dev,
2453                 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2454         if (ret < 0) {
2455                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2456                 return;
2457         }
2458         prev_status = di->flags.usbchargernotok;
2459
2460         if (reg_value & VBUS_CH_NOK) {
2461                 di->flags.usbchargernotok = true;
2462                 /* Check again in 1sec */
2463                 queue_delayed_work(di->charger_wq,
2464                         &di->check_usbchgnotok_work, HZ);
2465         } else {
2466                 di->flags.usbchargernotok = false;
2467                 di->flags.vbus_collapse = false;
2468         }
2469
2470         if (prev_status != di->flags.usbchargernotok)
2471                 ab8500_power_supply_changed(di, di->usb_chg.psy);
2472 }
2473
2474 /**
2475  * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
2476  * @work:       pointer to the work_struct structure
2477  *
2478  * Work queue function for checking the Main thermal prot status
2479  */
2480 static void ab8500_charger_check_main_thermal_prot_work(
2481         struct work_struct *work)
2482 {
2483         int ret;
2484         u8 reg_value;
2485
2486         struct ab8500_charger *di = container_of(work,
2487                 struct ab8500_charger, check_main_thermal_prot_work);
2488
2489         /* Check if the status bit for main_thermal_prot is still active */
2490         ret = abx500_get_register_interruptible(di->dev,
2491                 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
2492         if (ret < 0) {
2493                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2494                 return;
2495         }
2496         if (reg_value & MAIN_CH_TH_PROT)
2497                 di->flags.main_thermal_prot = true;
2498         else
2499                 di->flags.main_thermal_prot = false;
2500
2501         ab8500_power_supply_changed(di, di->ac_chg.psy);
2502 }
2503
2504 /**
2505  * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
2506  * @work:       pointer to the work_struct structure
2507  *
2508  * Work queue function for checking the USB thermal prot status
2509  */
2510 static void ab8500_charger_check_usb_thermal_prot_work(
2511         struct work_struct *work)
2512 {
2513         int ret;
2514         u8 reg_value;
2515
2516         struct ab8500_charger *di = container_of(work,
2517                 struct ab8500_charger, check_usb_thermal_prot_work);
2518
2519         /* Check if the status bit for usb_thermal_prot is still active */
2520         ret = abx500_get_register_interruptible(di->dev,
2521                 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
2522         if (ret < 0) {
2523                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
2524                 return;
2525         }
2526         if (reg_value & USB_CH_TH_PROT)
2527                 di->flags.usb_thermal_prot = true;
2528         else
2529                 di->flags.usb_thermal_prot = false;
2530
2531         ab8500_power_supply_changed(di, di->usb_chg.psy);
2532 }
2533
2534 /**
2535  * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
2536  * @irq:       interrupt number
2537  * @_di:       pointer to the ab8500_charger structure
2538  *
2539  * Returns IRQ status(IRQ_HANDLED)
2540  */
2541 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
2542 {
2543         struct ab8500_charger *di = _di;
2544
2545         dev_dbg(di->dev, "Main charger unplugged\n");
2546         queue_work(di->charger_wq, &di->ac_work);
2547
2548         cancel_delayed_work_sync(&di->ac_charger_attached_work);
2549         mutex_lock(&di->charger_attached_mutex);
2550         mutex_unlock(&di->charger_attached_mutex);
2551
2552         return IRQ_HANDLED;
2553 }
2554
2555 /**
2556  * ab8500_charger_mainchplugdet_handler() - main charger plugged
2557  * @irq:       interrupt number
2558  * @_di:       pointer to the ab8500_charger structure
2559  *
2560  * Returns IRQ status(IRQ_HANDLED)
2561  */
2562 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
2563 {
2564         struct ab8500_charger *di = _di;
2565
2566         dev_dbg(di->dev, "Main charger plugged\n");
2567         queue_work(di->charger_wq, &di->ac_work);
2568
2569         mutex_lock(&di->charger_attached_mutex);
2570         mutex_unlock(&di->charger_attached_mutex);
2571
2572         if (is_ab8500(di->parent))
2573                 queue_delayed_work(di->charger_wq,
2574                            &di->ac_charger_attached_work,
2575                            HZ);
2576         return IRQ_HANDLED;
2577 }
2578
2579 /**
2580  * ab8500_charger_mainextchnotok_handler() - main charger not ok
2581  * @irq:       interrupt number
2582  * @_di:       pointer to the ab8500_charger structure
2583  *
2584  * Returns IRQ status(IRQ_HANDLED)
2585  */
2586 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
2587 {
2588         struct ab8500_charger *di = _di;
2589
2590         dev_dbg(di->dev, "Main charger not ok\n");
2591         di->flags.mainextchnotok = true;
2592         ab8500_power_supply_changed(di, di->ac_chg.psy);
2593
2594         /* Schedule a new HW failure check */
2595         queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2596
2597         return IRQ_HANDLED;
2598 }
2599
2600 /**
2601  * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
2602  * thermal protection threshold
2603  * @irq:       interrupt number
2604  * @_di:       pointer to the ab8500_charger structure
2605  *
2606  * Returns IRQ status(IRQ_HANDLED)
2607  */
2608 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
2609 {
2610         struct ab8500_charger *di = _di;
2611
2612         dev_dbg(di->dev,
2613                 "Die temp above Main charger thermal protection threshold\n");
2614         queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2615
2616         return IRQ_HANDLED;
2617 }
2618
2619 /**
2620  * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
2621  * thermal protection threshold
2622  * @irq:       interrupt number
2623  * @_di:       pointer to the ab8500_charger structure
2624  *
2625  * Returns IRQ status(IRQ_HANDLED)
2626  */
2627 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
2628 {
2629         struct ab8500_charger *di = _di;
2630
2631         dev_dbg(di->dev,
2632                 "Die temp ok for Main charger thermal protection threshold\n");
2633         queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
2634
2635         return IRQ_HANDLED;
2636 }
2637
2638 static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
2639 {
2640         struct ab8500_charger *di = container_of(work,
2641                 struct ab8500_charger, vbus_drop_end_work.work);
2642         int ret, curr;
2643         u8 reg_value;
2644
2645         di->flags.vbus_drop_end = false;
2646
2647         /* Reset the drop counter */
2648         abx500_set_register_interruptible(di->dev,
2649                                   AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);
2650
2651         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
2652                         AB8500_CH_USBCH_STAT2_REG, &reg_value);
2653         if (ret < 0) {
2654                 dev_err(di->dev, "%s read failed\n", __func__);
2655                 return;
2656         }
2657
2658         curr = di->bm->chg_input_curr[
2659                 reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];
2660
2661         if (di->max_usb_in_curr.calculated_max != curr) {
2662                 /* USB source is collapsing */
2663                 di->max_usb_in_curr.calculated_max = curr;
2664                 dev_dbg(di->dev,
2665                          "VBUS input current limiting to %d mA\n",
2666                          di->max_usb_in_curr.calculated_max);
2667         } else {
2668                 /*
2669                  * USB source can not give more than this amount.
2670                  * Taking more will collapse the source.
2671                  */
2672                 di->max_usb_in_curr.set_max =
2673                         di->max_usb_in_curr.calculated_max;
2674                 dev_dbg(di->dev,
2675                          "VBUS input current limited to %d mA\n",
2676                          di->max_usb_in_curr.set_max);
2677         }
2678
2679         if (di->usb.charger_connected)
2680                 ab8500_charger_set_vbus_in_curr(di,
2681                                         di->max_usb_in_curr.usb_type_max);
2682 }
2683
2684 /**
2685  * ab8500_charger_vbusdetf_handler() - VBUS falling detected
2686  * @irq:       interrupt number
2687  * @_di:       pointer to the ab8500_charger structure
2688  *
2689  * Returns IRQ status(IRQ_HANDLED)
2690  */
2691 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
2692 {
2693         struct ab8500_charger *di = _di;
2694
2695         di->vbus_detected = false;
2696         dev_dbg(di->dev, "VBUS falling detected\n");
2697         queue_work(di->charger_wq, &di->detect_usb_type_work);
2698
2699         return IRQ_HANDLED;
2700 }
2701
2702 /**
2703  * ab8500_charger_vbusdetr_handler() - VBUS rising 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_vbusdetr_handler(int irq, void *_di)
2710 {
2711         struct ab8500_charger *di = _di;
2712
2713         di->vbus_detected = true;
2714         dev_dbg(di->dev, "VBUS rising detected\n");
2715
2716         queue_work(di->charger_wq, &di->detect_usb_type_work);
2717
2718         return IRQ_HANDLED;
2719 }
2720
2721 /**
2722  * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2723  * @irq:       interrupt number
2724  * @_di:       pointer to the ab8500_charger structure
2725  *
2726  * Returns IRQ status(IRQ_HANDLED)
2727  */
2728 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2729 {
2730         struct ab8500_charger *di = _di;
2731
2732         dev_dbg(di->dev, "USB link status changed\n");
2733
2734         queue_work(di->charger_wq, &di->usb_link_status_work);
2735
2736         return IRQ_HANDLED;
2737 }
2738
2739 /**
2740  * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2741  * thermal protection threshold
2742  * @irq:       interrupt number
2743  * @_di:       pointer to the ab8500_charger structure
2744  *
2745  * Returns IRQ status(IRQ_HANDLED)
2746  */
2747 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2748 {
2749         struct ab8500_charger *di = _di;
2750
2751         dev_dbg(di->dev,
2752                 "Die temp above USB charger thermal protection threshold\n");
2753         queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2754
2755         return IRQ_HANDLED;
2756 }
2757
2758 /**
2759  * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2760  * thermal protection threshold
2761  * @irq:       interrupt number
2762  * @_di:       pointer to the ab8500_charger structure
2763  *
2764  * Returns IRQ status(IRQ_HANDLED)
2765  */
2766 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2767 {
2768         struct ab8500_charger *di = _di;
2769
2770         dev_dbg(di->dev,
2771                 "Die temp ok for USB charger thermal protection threshold\n");
2772         queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2773
2774         return IRQ_HANDLED;
2775 }
2776
2777 /**
2778  * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
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_usbchargernotokr_handler(int irq, void *_di)
2785 {
2786         struct ab8500_charger *di = _di;
2787
2788         dev_dbg(di->dev, "Not allowed USB charger detected\n");
2789         queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2790
2791         return IRQ_HANDLED;
2792 }
2793
2794 /**
2795  * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2796  * @irq:       interrupt number
2797  * @_di:       pointer to the ab8500_charger structure
2798  *
2799  * Returns IRQ status(IRQ_HANDLED)
2800  */
2801 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2802 {
2803         struct ab8500_charger *di = _di;
2804
2805         dev_dbg(di->dev, "Charger watchdog expired\n");
2806
2807         /*
2808          * The charger that was online when the watchdog expired
2809          * needs to be restarted for charging to start again
2810          */
2811         if (di->ac.charger_online) {
2812                 di->ac.wd_expired = true;
2813                 ab8500_power_supply_changed(di, di->ac_chg.psy);
2814         }
2815         if (di->usb.charger_online) {
2816                 di->usb.wd_expired = true;
2817                 ab8500_power_supply_changed(di, di->usb_chg.psy);
2818         }
2819
2820         return IRQ_HANDLED;
2821 }
2822
2823 /**
2824  * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
2825  * @irq:       interrupt number
2826  * @_di:       pointer to the ab8500_charger structure
2827  *
2828  * Returns IRQ status(IRQ_HANDLED)
2829  */
2830 static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
2831 {
2832         struct ab8500_charger *di = _di;
2833
2834         dev_dbg(di->dev, "VBUS charger drop ended\n");
2835         di->flags.vbus_drop_end = true;
2836
2837         /*
2838          * VBUS might have dropped due to bad connection.
2839          * Schedule a new input limit set to the value SW requests.
2840          */
2841         queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
2842                            round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));
2843
2844         return IRQ_HANDLED;
2845 }
2846
2847 /**
2848  * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2849  * @irq:       interrupt number
2850  * @_di:       pointer to the ab8500_charger structure
2851  *
2852  * Returns IRQ status(IRQ_HANDLED)
2853  */
2854 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2855 {
2856         struct ab8500_charger *di = _di;
2857
2858         dev_dbg(di->dev, "VBUS overvoltage detected\n");
2859         di->flags.vbus_ovv = true;
2860         ab8500_power_supply_changed(di, di->usb_chg.psy);
2861
2862         /* Schedule a new HW failure check */
2863         queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2864
2865         return IRQ_HANDLED;
2866 }
2867
2868 /**
2869  * ab8500_charger_ac_get_property() - get the ac/mains properties
2870  * @psy:       pointer to the power_supply structure
2871  * @psp:       pointer to the power_supply_property structure
2872  * @val:       pointer to the power_supply_propval union
2873  *
2874  * This function gets called when an application tries to get the ac/mains
2875  * properties by reading the sysfs files.
2876  * AC/Mains properties are online, present and voltage.
2877  * online:     ac/mains charging is in progress or not
2878  * present:    presence of the ac/mains
2879  * voltage:    AC/Mains voltage
2880  * Returns error code in case of failure else 0(on success)
2881  */
2882 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2883         enum power_supply_property psp,
2884         union power_supply_propval *val)
2885 {
2886         struct ab8500_charger *di;
2887         int ret;
2888
2889         di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2890
2891         switch (psp) {
2892         case POWER_SUPPLY_PROP_HEALTH:
2893                 if (di->flags.mainextchnotok)
2894                         val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2895                 else if (di->ac.wd_expired || di->usb.wd_expired)
2896                         val->intval = POWER_SUPPLY_HEALTH_DEAD;
2897                 else if (di->flags.main_thermal_prot)
2898                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2899                 else
2900                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
2901                 break;
2902         case POWER_SUPPLY_PROP_ONLINE:
2903                 val->intval = di->ac.charger_online;
2904                 break;
2905         case POWER_SUPPLY_PROP_PRESENT:
2906                 val->intval = di->ac.charger_connected;
2907                 break;
2908         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2909                 ret = ab8500_charger_get_ac_voltage(di);
2910                 if (ret >= 0)
2911                         di->ac.charger_voltage = ret;
2912                 /* On error, use previous value */
2913                 val->intval = di->ac.charger_voltage * 1000;
2914                 break;
2915         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2916                 /*
2917                  * This property is used to indicate when CV mode is entered
2918                  * for the AC charger
2919                  */
2920                 di->ac.cv_active = ab8500_charger_ac_cv(di);
2921                 val->intval = di->ac.cv_active;
2922                 break;
2923         case POWER_SUPPLY_PROP_CURRENT_NOW:
2924                 ret = ab8500_charger_get_ac_current(di);
2925                 if (ret >= 0)
2926                         di->ac.charger_current = ret;
2927                 val->intval = di->ac.charger_current * 1000;
2928                 break;
2929         default:
2930                 return -EINVAL;
2931         }
2932         return 0;
2933 }
2934
2935 /**
2936  * ab8500_charger_usb_get_property() - get the usb properties
2937  * @psy:        pointer to the power_supply structure
2938  * @psp:        pointer to the power_supply_property structure
2939  * @val:        pointer to the power_supply_propval union
2940  *
2941  * This function gets called when an application tries to get the usb
2942  * properties by reading the sysfs files.
2943  * USB properties are online, present and voltage.
2944  * online:     usb charging is in progress or not
2945  * present:    presence of the usb
2946  * voltage:    vbus voltage
2947  * Returns error code in case of failure else 0(on success)
2948  */
2949 static int ab8500_charger_usb_get_property(struct power_supply *psy,
2950         enum power_supply_property psp,
2951         union power_supply_propval *val)
2952 {
2953         struct ab8500_charger *di;
2954         int ret;
2955
2956         di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2957
2958         switch (psp) {
2959         case POWER_SUPPLY_PROP_HEALTH:
2960                 if (di->flags.usbchargernotok)
2961                         val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2962                 else if (di->ac.wd_expired || di->usb.wd_expired)
2963                         val->intval = POWER_SUPPLY_HEALTH_DEAD;
2964                 else if (di->flags.usb_thermal_prot)
2965                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2966                 else if (di->flags.vbus_ovv)
2967                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2968                 else
2969                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
2970                 break;
2971         case POWER_SUPPLY_PROP_ONLINE:
2972                 val->intval = di->usb.charger_online;
2973                 break;
2974         case POWER_SUPPLY_PROP_PRESENT:
2975                 val->intval = di->usb.charger_connected;
2976                 break;
2977         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2978                 ret = ab8500_charger_get_vbus_voltage(di);
2979                 if (ret >= 0)
2980                         di->usb.charger_voltage = ret;
2981                 val->intval = di->usb.charger_voltage * 1000;
2982                 break;
2983         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2984                 /*
2985                  * This property is used to indicate when CV mode is entered
2986                  * for the USB charger
2987                  */
2988                 di->usb.cv_active = ab8500_charger_usb_cv(di);
2989                 val->intval = di->usb.cv_active;
2990                 break;
2991         case POWER_SUPPLY_PROP_CURRENT_NOW:
2992                 ret = ab8500_charger_get_usb_current(di);
2993                 if (ret >= 0)
2994                         di->usb.charger_current = ret;
2995                 val->intval = di->usb.charger_current * 1000;
2996                 break;
2997         case POWER_SUPPLY_PROP_CURRENT_AVG:
2998                 /*
2999                  * This property is used to indicate when VBUS has collapsed
3000                  * due to too high output current from the USB charger
3001                  */
3002                 if (di->flags.vbus_collapse)
3003                         val->intval = 1;
3004                 else
3005                         val->intval = 0;
3006                 break;
3007         default:
3008                 return -EINVAL;
3009         }
3010         return 0;
3011 }
3012
3013 /**
3014  * ab8500_charger_init_hw_registers() - Set up charger related registers
3015  * @di:         pointer to the ab8500_charger structure
3016  *
3017  * Set up charger OVV, watchdog and maximum voltage registers as well as
3018  * charging of the backup battery
3019  */
3020 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
3021 {
3022         int ret = 0;
3023
3024         /* Setup maximum charger current and voltage for ABB cut2.0 */
3025         if (!is_ab8500_1p1_or_earlier(di->parent)) {
3026                 ret = abx500_set_register_interruptible(di->dev,
3027                         AB8500_CHARGER,
3028                         AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
3029                 if (ret) {
3030                         dev_err(di->dev,
3031                                 "failed to set CH_VOLT_LVL_MAX_REG\n");
3032                         goto out;
3033                 }
3034
3035                 ret = abx500_set_register_interruptible(di->dev,
3036                         AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
3037                         CH_OP_CUR_LVL_1P6);
3038                 if (ret) {
3039                         dev_err(di->dev,
3040                                 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
3041                         goto out;
3042                 }
3043         }
3044
3045         if (is_ab8505_2p0(di->parent))
3046                 ret = abx500_mask_and_set_register_interruptible(di->dev,
3047                         AB8500_CHARGER,
3048                         AB8500_USBCH_CTRL2_REG,
3049                         VBUS_AUTO_IN_CURR_LIM_ENA,
3050                         VBUS_AUTO_IN_CURR_LIM_ENA);
3051         else
3052                 /*
3053                  * VBUS OVV set to 6.3V and enable automatic current limitation
3054                  */
3055                 ret = abx500_set_register_interruptible(di->dev,
3056                         AB8500_CHARGER,
3057                         AB8500_USBCH_CTRL2_REG,
3058                         VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
3059         if (ret) {
3060                 dev_err(di->dev,
3061                         "failed to set automatic current limitation\n");
3062                 goto out;
3063         }
3064
3065         /* Enable main watchdog in OTP */
3066         ret = abx500_set_register_interruptible(di->dev,
3067                 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
3068         if (ret) {
3069                 dev_err(di->dev, "failed to enable main WD in OTP\n");
3070                 goto out;
3071         }
3072
3073         /* Enable main watchdog */
3074         ret = abx500_set_register_interruptible(di->dev,
3075                 AB8500_SYS_CTRL2_BLOCK,
3076                 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
3077         if (ret) {
3078                 dev_err(di->dev, "failed to enable main watchdog\n");
3079                 goto out;
3080         }
3081
3082         /*
3083          * Due to internal synchronisation, Enable and Kick watchdog bits
3084          * cannot be enabled in a single write.
3085          * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
3086          * between writing Enable then Kick bits.
3087          */
3088         udelay(63);
3089
3090         /* Kick main watchdog */
3091         ret = abx500_set_register_interruptible(di->dev,
3092                 AB8500_SYS_CTRL2_BLOCK,
3093                 AB8500_MAIN_WDOG_CTRL_REG,
3094                 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
3095         if (ret) {
3096                 dev_err(di->dev, "failed to kick main watchdog\n");
3097                 goto out;
3098         }
3099
3100         /* Disable main watchdog */
3101         ret = abx500_set_register_interruptible(di->dev,
3102                 AB8500_SYS_CTRL2_BLOCK,
3103                 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
3104         if (ret) {
3105                 dev_err(di->dev, "failed to disable main watchdog\n");
3106                 goto out;
3107         }
3108
3109         /* Set watchdog timeout */
3110         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3111                 AB8500_CH_WD_TIMER_REG, WD_TIMER);
3112         if (ret) {
3113                 dev_err(di->dev, "failed to set charger watchdog timeout\n");
3114                 goto out;
3115         }
3116
3117         ret = ab8500_charger_led_en(di, false);
3118         if (ret < 0) {
3119                 dev_err(di->dev, "failed to disable LED\n");
3120                 goto out;
3121         }
3122
3123         ret = abx500_set_register_interruptible(di->dev,
3124                 AB8500_RTC,
3125                 AB8500_RTC_BACKUP_CHG_REG,
3126                 (di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
3127         if (ret) {
3128                 dev_err(di->dev, "failed to setup backup battery charging\n");
3129                 goto out;
3130         }
3131
3132         /* Enable backup battery charging */
3133         ret = abx500_mask_and_set_register_interruptible(di->dev,
3134                 AB8500_RTC, AB8500_RTC_CTRL_REG,
3135                 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
3136         if (ret < 0) {
3137                 dev_err(di->dev, "%s mask and set failed\n", __func__);
3138                 goto out;
3139         }
3140
3141 out:
3142         return ret;
3143 }
3144
3145 /*
3146  * ab8500 charger driver interrupts and their respective isr
3147  */
3148 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
3149         {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
3150         {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
3151         {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
3152         {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
3153         {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
3154         {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
3155         {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
3156         {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
3157         {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
3158         {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
3159         {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
3160         {"VBUS_OVV", ab8500_charger_vbusovv_handler},
3161         {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
3162         {"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
3163 };
3164
3165 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
3166                 unsigned long event, void *power)
3167 {
3168         struct ab8500_charger *di =
3169                 container_of(nb, struct ab8500_charger, nb);
3170         enum ab8500_usb_state bm_usb_state;
3171         unsigned mA = *((unsigned *)power);
3172
3173         if (!di)
3174                 return NOTIFY_DONE;
3175
3176         if (event != USB_EVENT_VBUS) {
3177                 dev_dbg(di->dev, "not a standard host, returning\n");
3178                 return NOTIFY_DONE;
3179         }
3180
3181         /* TODO: State is fabricate  here. See if charger really needs USB
3182          * state or if mA is enough
3183          */
3184         if ((di->usb_state.usb_current == 2) && (mA > 2))
3185                 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
3186         else if (mA == 0)
3187                 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
3188         else if (mA == 2)
3189                 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
3190         else if (mA >= 8) /* 8, 100, 500 */
3191                 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
3192         else /* Should never occur */
3193                 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
3194
3195         dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
3196                 __func__, bm_usb_state, mA);
3197
3198         spin_lock(&di->usb_state.usb_lock);
3199         di->usb_state.state_tmp = bm_usb_state;
3200         di->usb_state.usb_current_tmp = mA;
3201         spin_unlock(&di->usb_state.usb_lock);
3202
3203         /*
3204          * wait for some time until you get updates from the usb stack
3205          * and negotiations are completed
3206          */
3207         queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);
3208
3209         return NOTIFY_OK;
3210 }
3211
3212 static int __maybe_unused ab8500_charger_resume(struct device *dev)
3213 {
3214         int ret;
3215         struct ab8500_charger *di = dev_get_drvdata(dev);
3216
3217         /*
3218          * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3219          * logic. That means we have to continuously kick the charger
3220          * watchdog even when no charger is connected. This is only
3221          * valid once the AC charger has been enabled. This is
3222          * a bug that is not handled by the algorithm and the
3223          * watchdog have to be kicked by the charger driver
3224          * when the AC charger is disabled
3225          */
3226         if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
3227                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
3228                         AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
3229                 if (ret)
3230                         dev_err(di->dev, "Failed to kick WD!\n");
3231
3232                 /* If not already pending start a new timer */
3233                 queue_delayed_work(di->charger_wq, &di->kick_wd_work,
3234                                    round_jiffies(WD_KICK_INTERVAL));
3235         }
3236
3237         /* If we still have a HW failure, schedule a new check */
3238         if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
3239                 queue_delayed_work(di->charger_wq,
3240                         &di->check_hw_failure_work, 0);
3241         }
3242
3243         if (di->flags.vbus_drop_end)
3244                 queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);
3245
3246         return 0;
3247 }
3248
3249 static int __maybe_unused ab8500_charger_suspend(struct device *dev)
3250 {
3251         struct ab8500_charger *di = dev_get_drvdata(dev);
3252
3253         /* Cancel any pending jobs */
3254         cancel_delayed_work(&di->check_hw_failure_work);
3255         cancel_delayed_work(&di->vbus_drop_end_work);
3256
3257         flush_delayed_work(&di->attach_work);
3258         flush_delayed_work(&di->usb_charger_attached_work);
3259         flush_delayed_work(&di->ac_charger_attached_work);
3260         flush_delayed_work(&di->check_usbchgnotok_work);
3261         flush_delayed_work(&di->check_vbat_work);
3262         flush_delayed_work(&di->kick_wd_work);
3263
3264         flush_work(&di->usb_link_status_work);
3265         flush_work(&di->ac_work);
3266         flush_work(&di->detect_usb_type_work);
3267
3268         if (atomic_read(&di->current_stepping_sessions))
3269                 return -EAGAIN;
3270
3271         return 0;
3272 }
3273
3274 static struct notifier_block charger_nb = {
3275         .notifier_call = ab8500_external_charger_prepare,
3276 };
3277
3278 static int ab8500_charger_remove(struct platform_device *pdev)
3279 {
3280         struct ab8500_charger *di = platform_get_drvdata(pdev);
3281         int i, irq, ret;
3282
3283         /* Disable AC charging */
3284         ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
3285
3286         /* Disable USB charging */
3287         ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
3288
3289         /* Disable interrupts */
3290         for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3291                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3292                 free_irq(irq, di);
3293         }
3294
3295         /* Backup battery voltage and current disable */
3296         ret = abx500_mask_and_set_register_interruptible(di->dev,
3297                 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
3298         if (ret < 0)
3299                 dev_err(di->dev, "%s mask and set failed\n", __func__);
3300
3301         usb_unregister_notifier(di->usb_phy, &di->nb);
3302         usb_put_phy(di->usb_phy);
3303
3304         /* Delete the work queue */
3305         destroy_workqueue(di->charger_wq);
3306
3307         /* Unregister external charger enable notifier */
3308         if (!di->ac_chg.enabled)
3309                 blocking_notifier_chain_unregister(
3310                         &charger_notifier_list, &charger_nb);
3311
3312         flush_scheduled_work();
3313         if (di->usb_chg.enabled)
3314                 power_supply_unregister(di->usb_chg.psy);
3315
3316         if (di->ac_chg.enabled && !di->ac_chg.external)
3317                 power_supply_unregister(di->ac_chg.psy);
3318
3319         return 0;
3320 }
3321
3322 static char *supply_interface[] = {
3323         "ab8500_chargalg",
3324         "ab8500_fg",
3325         "ab8500_btemp",
3326 };
3327
3328 static const struct power_supply_desc ab8500_ac_chg_desc = {
3329         .name           = "ab8500_ac",
3330         .type           = POWER_SUPPLY_TYPE_MAINS,
3331         .properties     = ab8500_charger_ac_props,
3332         .num_properties = ARRAY_SIZE(ab8500_charger_ac_props),
3333         .get_property   = ab8500_charger_ac_get_property,
3334 };
3335
3336 static const struct power_supply_desc ab8500_usb_chg_desc = {
3337         .name           = "ab8500_usb",
3338         .type           = POWER_SUPPLY_TYPE_USB,
3339         .properties     = ab8500_charger_usb_props,
3340         .num_properties = ARRAY_SIZE(ab8500_charger_usb_props),
3341         .get_property   = ab8500_charger_usb_get_property,
3342 };
3343
3344 static int ab8500_charger_probe(struct platform_device *pdev)
3345 {
3346         struct device_node *np = pdev->dev.of_node;
3347         struct abx500_bm_data *plat = pdev->dev.platform_data;
3348         struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
3349         struct ab8500_charger *di;
3350         int irq, i, charger_status, ret = 0, ch_stat;
3351         struct device *dev = &pdev->dev;
3352
3353         di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
3354         if (!di)
3355                 return -ENOMEM;
3356
3357         if (!plat) {
3358                 dev_err(dev, "no battery management data supplied\n");
3359                 return -EINVAL;
3360         }
3361         di->bm = plat;
3362
3363         if (np) {
3364                 ret = ab8500_bm_of_probe(dev, np, di->bm);
3365                 if (ret) {
3366                         dev_err(dev, "failed to get battery information\n");
3367                         return ret;
3368                 }
3369                 di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
3370         } else
3371                 di->autopower_cfg = false;
3372
3373         /* get parent data */
3374         di->dev = dev;
3375         di->parent = dev_get_drvdata(pdev->dev.parent);
3376
3377         /* Get ADC channels */
3378         di->adc_main_charger_v = devm_iio_channel_get(dev, "main_charger_v");
3379         if (IS_ERR(di->adc_main_charger_v)) {
3380                 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_v),
3381                                     "failed to get ADC main charger voltage\n");
3382                 return ret;
3383         }
3384         di->adc_main_charger_c = devm_iio_channel_get(dev, "main_charger_c");
3385         if (IS_ERR(di->adc_main_charger_c)) {
3386                 ret = dev_err_probe(dev, PTR_ERR(di->adc_main_charger_c),
3387                                     "failed to get ADC main charger current\n");
3388                 return ret;
3389         }
3390         di->adc_vbus_v = devm_iio_channel_get(dev, "vbus_v");
3391         if (IS_ERR(di->adc_vbus_v)) {
3392                 ret = dev_err_probe(dev, PTR_ERR(di->adc_vbus_v),
3393                                     "failed to get ADC USB charger voltage\n");
3394                 return ret;
3395         }
3396         di->adc_usb_charger_c = devm_iio_channel_get(dev, "usb_charger_c");
3397         if (IS_ERR(di->adc_usb_charger_c)) {
3398                 ret = dev_err_probe(dev, PTR_ERR(di->adc_usb_charger_c),
3399                                     "failed to get ADC USB charger current\n");
3400                 return ret;
3401         }
3402
3403         /* initialize lock */
3404         spin_lock_init(&di->usb_state.usb_lock);
3405         mutex_init(&di->usb_ipt_crnt_lock);
3406
3407         di->autopower = false;
3408         di->invalid_charger_detect_state = 0;
3409
3410         /* AC and USB supply config */
3411         ac_psy_cfg.supplied_to = supply_interface;
3412         ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3413         ac_psy_cfg.drv_data = &di->ac_chg;
3414         usb_psy_cfg.supplied_to = supply_interface;
3415         usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
3416         usb_psy_cfg.drv_data = &di->usb_chg;
3417
3418         /* AC supply */
3419         /* ux500_charger sub-class */
3420         di->ac_chg.ops.enable = &ab8500_charger_ac_en;
3421         di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
3422         di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3423         di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3424         di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
3425                 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3426         di->ac_chg.max_out_curr =
3427                 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3428         di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
3429         di->ac_chg.enabled = di->bm->ac_enabled;
3430         di->ac_chg.external = false;
3431
3432         /*notifier for external charger enabling*/
3433         if (!di->ac_chg.enabled)
3434                 blocking_notifier_chain_register(
3435                         &charger_notifier_list, &charger_nb);
3436
3437         /* USB supply */
3438         /* ux500_charger sub-class */
3439         di->usb_chg.ops.enable = &ab8500_charger_usb_en;
3440         di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
3441         di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
3442         di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
3443         di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
3444                 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
3445         di->usb_chg.max_out_curr =
3446                 di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
3447         di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
3448         di->usb_chg.enabled = di->bm->usb_enabled;
3449         di->usb_chg.external = false;
3450         di->usb_state.usb_current = -1;
3451
3452         /* Create a work queue for the charger */
3453         di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
3454                                                  WQ_MEM_RECLAIM);
3455         if (di->charger_wq == NULL) {
3456                 dev_err(dev, "failed to create work queue\n");
3457                 return -ENOMEM;
3458         }
3459
3460         mutex_init(&di->charger_attached_mutex);
3461
3462         /* Init work for HW failure check */
3463         INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
3464                 ab8500_charger_check_hw_failure_work);
3465         INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
3466                 ab8500_charger_check_usbchargernotok_work);
3467
3468         INIT_DELAYED_WORK(&di->ac_charger_attached_work,
3469                           ab8500_charger_ac_attached_work);
3470         INIT_DELAYED_WORK(&di->usb_charger_attached_work,
3471                           ab8500_charger_usb_attached_work);
3472
3473         /*
3474          * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
3475          * logic. That means we have to continuously kick the charger
3476          * watchdog even when no charger is connected. This is only
3477          * valid once the AC charger has been enabled. This is
3478          * a bug that is not handled by the algorithm and the
3479          * watchdog have to be kicked by the charger driver
3480          * when the AC charger is disabled
3481          */
3482         INIT_DEFERRABLE_WORK(&di->kick_wd_work,
3483                 ab8500_charger_kick_watchdog_work);
3484
3485         INIT_DEFERRABLE_WORK(&di->check_vbat_work,
3486                 ab8500_charger_check_vbat_work);
3487
3488         INIT_DELAYED_WORK(&di->attach_work,
3489                 ab8500_charger_usb_link_attach_work);
3490
3491         INIT_DELAYED_WORK(&di->usb_state_changed_work,
3492                 ab8500_charger_usb_state_changed_work);
3493
3494         INIT_DELAYED_WORK(&di->vbus_drop_end_work,
3495                 ab8500_charger_vbus_drop_end_work);
3496
3497         /* Init work for charger detection */
3498         INIT_WORK(&di->usb_link_status_work,
3499                 ab8500_charger_usb_link_status_work);
3500         INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
3501         INIT_WORK(&di->detect_usb_type_work,
3502                 ab8500_charger_detect_usb_type_work);
3503
3504         /* Init work for checking HW status */
3505         INIT_WORK(&di->check_main_thermal_prot_work,
3506                 ab8500_charger_check_main_thermal_prot_work);
3507         INIT_WORK(&di->check_usb_thermal_prot_work,
3508                 ab8500_charger_check_usb_thermal_prot_work);
3509
3510         /*
3511          * VDD ADC supply needs to be enabled from this driver when there
3512          * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
3513          * interrupts during charging
3514          */
3515         di->regu = devm_regulator_get(dev, "vddadc");
3516         if (IS_ERR(di->regu)) {
3517                 ret = PTR_ERR(di->regu);
3518                 dev_err(dev, "failed to get vddadc regulator\n");
3519                 goto free_charger_wq;
3520         }
3521
3522
3523         /* Initialize OVV, and other registers */
3524         ret = ab8500_charger_init_hw_registers(di);
3525         if (ret) {
3526                 dev_err(dev, "failed to initialize ABB registers\n");
3527                 goto free_charger_wq;
3528         }
3529
3530         /* Register AC charger class */
3531         if (di->ac_chg.enabled) {
3532                 di->ac_chg.psy = power_supply_register(dev,
3533                                                        &ab8500_ac_chg_desc,
3534                                                        &ac_psy_cfg);
3535                 if (IS_ERR(di->ac_chg.psy)) {
3536                         dev_err(dev, "failed to register AC charger\n");
3537                         ret = PTR_ERR(di->ac_chg.psy);
3538                         goto free_charger_wq;
3539                 }
3540         }
3541
3542         /* Register USB charger class */
3543         if (di->usb_chg.enabled) {
3544                 di->usb_chg.psy = power_supply_register(dev,
3545                                                         &ab8500_usb_chg_desc,
3546                                                         &usb_psy_cfg);
3547                 if (IS_ERR(di->usb_chg.psy)) {
3548                         dev_err(dev, "failed to register USB charger\n");
3549                         ret = PTR_ERR(di->usb_chg.psy);
3550                         goto free_ac;
3551                 }
3552         }
3553
3554         di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
3555         if (IS_ERR_OR_NULL(di->usb_phy)) {
3556                 dev_err(dev, "failed to get usb transceiver\n");
3557                 ret = -EINVAL;
3558                 goto free_usb;
3559         }
3560         di->nb.notifier_call = ab8500_charger_usb_notifier_call;
3561         ret = usb_register_notifier(di->usb_phy, &di->nb);
3562         if (ret) {
3563                 dev_err(dev, "failed to register usb notifier\n");
3564                 goto put_usb_phy;
3565         }
3566
3567         /* Identify the connected charger types during startup */
3568         charger_status = ab8500_charger_detect_chargers(di, true);
3569         if (charger_status & AC_PW_CONN) {
3570                 di->ac.charger_connected = 1;
3571                 di->ac_conn = true;
3572                 ab8500_power_supply_changed(di, di->ac_chg.psy);
3573                 sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
3574         }
3575
3576         if (charger_status & USB_PW_CONN) {
3577                 di->vbus_detected = true;
3578                 di->vbus_detected_start = true;
3579                 queue_work(di->charger_wq,
3580                         &di->detect_usb_type_work);
3581         }
3582
3583         /* Register interrupts */
3584         for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
3585                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3586                 if (irq < 0) {
3587                         ret = irq;
3588                         goto free_irq;
3589                 }
3590
3591                 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
3592                         IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
3593                         ab8500_charger_irq[i].name, di);
3594
3595                 if (ret != 0) {
3596                         dev_err(dev, "failed to request %s IRQ %d: %d\n"
3597                                 , ab8500_charger_irq[i].name, irq, ret);
3598                         goto free_irq;
3599                 }
3600                 dev_dbg(dev, "Requested %s IRQ %d: %d\n",
3601                         ab8500_charger_irq[i].name, irq, ret);
3602         }
3603
3604         platform_set_drvdata(pdev, di);
3605
3606         mutex_lock(&di->charger_attached_mutex);
3607
3608         ch_stat = ab8500_charger_detect_chargers(di, false);
3609
3610         if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
3611                 if (is_ab8500(di->parent))
3612                         queue_delayed_work(di->charger_wq,
3613                                            &di->ac_charger_attached_work,
3614                                            HZ);
3615         }
3616         if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
3617                 if (is_ab8500(di->parent))
3618                         queue_delayed_work(di->charger_wq,
3619                                            &di->usb_charger_attached_work,
3620                                            HZ);
3621         }
3622
3623         mutex_unlock(&di->charger_attached_mutex);
3624
3625         return ret;
3626
3627 free_irq:
3628         usb_unregister_notifier(di->usb_phy, &di->nb);
3629
3630         /* We also have to free all successfully registered irqs */
3631         for (i = i - 1; i >= 0; i--) {
3632                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
3633                 free_irq(irq, di);
3634         }
3635 put_usb_phy:
3636         usb_put_phy(di->usb_phy);
3637 free_usb:
3638         if (di->usb_chg.enabled)
3639                 power_supply_unregister(di->usb_chg.psy);
3640 free_ac:
3641         if (di->ac_chg.enabled)
3642                 power_supply_unregister(di->ac_chg.psy);
3643 free_charger_wq:
3644         destroy_workqueue(di->charger_wq);
3645         return ret;
3646 }
3647
3648 static SIMPLE_DEV_PM_OPS(ab8500_charger_pm_ops, ab8500_charger_suspend, ab8500_charger_resume);
3649
3650 static const struct of_device_id ab8500_charger_match[] = {
3651         { .compatible = "stericsson,ab8500-charger", },
3652         { },
3653 };
3654
3655 static struct platform_driver ab8500_charger_driver = {
3656         .probe = ab8500_charger_probe,
3657         .remove = ab8500_charger_remove,
3658         .driver = {
3659                 .name = "ab8500-charger",
3660                 .of_match_table = ab8500_charger_match,
3661                 .pm = &ab8500_charger_pm_ops,
3662         },
3663 };
3664
3665 static int __init ab8500_charger_init(void)
3666 {
3667         return platform_driver_register(&ab8500_charger_driver);
3668 }
3669
3670 static void __exit ab8500_charger_exit(void)
3671 {
3672         platform_driver_unregister(&ab8500_charger_driver);
3673 }
3674
3675 subsys_initcall_sync(ab8500_charger_init);
3676 module_exit(ab8500_charger_exit);
3677
3678 MODULE_LICENSE("GPL v2");
3679 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
3680 MODULE_ALIAS("platform:ab8500-charger");
3681 MODULE_DESCRIPTION("AB8500 charger management driver");