drivers/power/ab8500_charger.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2012
   3  *
   4  * Charger driver for AB8500
   5  *
   6  * License Terms: GNU General Public License v2
   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/slab.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/power_supply.h>
  21 #include <linux/completion.h>
  22 #include <linux/regulator/consumer.h>
  23 #include <linux/err.h>
  24 #include <linux/workqueue.h>
  25 #include <linux/kobject.h>
  26 #include <linux/mfd/abx500/ab8500.h>
  27 #include <linux/mfd/abx500.h>
  28 #include <linux/mfd/abx500/ab8500-bm.h>
  29 #include <linux/mfd/abx500/ab8500-gpadc.h>
  30 #include <linux/mfd/abx500/ux500_chargalg.h>
  31 #include <linux/usb/otg.h>
  32
  33 /* Charger constants */
  34 #define NO_PW_CONN                      0
  35 #define AC_PW_CONN                      1
  36 #define USB_PW_CONN                     2
  37
  38 #define MAIN_WDOG_ENA                   0x01
  39 #define MAIN_WDOG_KICK                  0x02
  40 #define MAIN_WDOG_DIS                   0x00
  41 #define CHARG_WD_KICK                   0x01
  42 #define MAIN_CH_ENA                     0x01
  43 #define MAIN_CH_NO_OVERSHOOT_ENA_N      0x02
  44 #define USB_CH_ENA                      0x01
  45 #define USB_CHG_NO_OVERSHOOT_ENA_N      0x02
  46 #define MAIN_CH_DET                     0x01
  47 #define MAIN_CH_CV_ON                   0x04
  48 #define USB_CH_CV_ON                    0x08
  49 #define VBUS_DET_DBNC100                0x02
  50 #define VBUS_DET_DBNC1                  0x01
  51 #define OTP_ENABLE_WD                   0x01
  52
  53 #define MAIN_CH_INPUT_CURR_SHIFT        4
  54 #define VBUS_IN_CURR_LIM_SHIFT          4
  55
  56 #define LED_INDICATOR_PWM_ENA           0x01
  57 #define LED_INDICATOR_PWM_DIS           0x00
  58 #define LED_IND_CUR_5MA                 0x04
  59 #define LED_INDICATOR_PWM_DUTY_252_256  0xBF
  60
  61 /* HW failure constants */
  62 #define MAIN_CH_TH_PROT                 0x02
  63 #define VBUS_CH_NOK                     0x08
  64 #define USB_CH_TH_PROT                  0x02
  65 #define VBUS_OVV_TH                     0x01
  66 #define MAIN_CH_NOK                     0x01
  67 #define VBUS_DET                        0x80
  68
  69 /* UsbLineStatus register bit masks */
  70 #define AB8500_USB_LINK_STATUS          0x78
  71 #define AB8500_STD_HOST_SUSP            0x18
  72
  73 /* Watchdog timeout constant */
  74 #define WD_TIMER                        0x30 /* 4min */
  75 #define WD_KICK_INTERVAL                (60 * HZ)
  76
  77 /* Lowest charger voltage is 3.39V -> 0x4E */
  78 #define LOW_VOLT_REG                    0x4E
  79
  80 /* UsbLineStatus register - usb types */
  81 enum ab8500_charger_link_status {
  82         USB_STAT_NOT_CONFIGURED,
  83         USB_STAT_STD_HOST_NC,
  84         USB_STAT_STD_HOST_C_NS,
  85         USB_STAT_STD_HOST_C_S,
  86         USB_STAT_HOST_CHG_NM,
  87         USB_STAT_HOST_CHG_HS,
  88         USB_STAT_HOST_CHG_HS_CHIRP,
  89         USB_STAT_DEDICATED_CHG,
  90         USB_STAT_ACA_RID_A,
  91         USB_STAT_ACA_RID_B,
  92         USB_STAT_ACA_RID_C_NM,
  93         USB_STAT_ACA_RID_C_HS,
  94         USB_STAT_ACA_RID_C_HS_CHIRP,
  95         USB_STAT_HM_IDGND,
  96         USB_STAT_RESERVED,
  97         USB_STAT_NOT_VALID_LINK,
  98 };
  99
 100 enum ab8500_usb_state {
 101         AB8500_BM_USB_STATE_RESET_HS,   /* HighSpeed Reset */
 102         AB8500_BM_USB_STATE_RESET_FS,   /* FullSpeed/LowSpeed Reset */
 103         AB8500_BM_USB_STATE_CONFIGURED,
 104         AB8500_BM_USB_STATE_SUSPEND,
 105         AB8500_BM_USB_STATE_RESUME,
 106         AB8500_BM_USB_STATE_MAX,
 107 };
 108
 109 /* VBUS input current limits supported in AB8500 in mA */
 110 #define USB_CH_IP_CUR_LVL_0P05          50
 111 #define USB_CH_IP_CUR_LVL_0P09          98
 112 #define USB_CH_IP_CUR_LVL_0P19          193
 113 #define USB_CH_IP_CUR_LVL_0P29          290
 114 #define USB_CH_IP_CUR_LVL_0P38          380
 115 #define USB_CH_IP_CUR_LVL_0P45          450
 116 #define USB_CH_IP_CUR_LVL_0P5           500
 117 #define USB_CH_IP_CUR_LVL_0P6           600
 118 #define USB_CH_IP_CUR_LVL_0P7           700
 119 #define USB_CH_IP_CUR_LVL_0P8           800
 120 #define USB_CH_IP_CUR_LVL_0P9           900
 121 #define USB_CH_IP_CUR_LVL_1P0           1000
 122 #define USB_CH_IP_CUR_LVL_1P1           1100
 123 #define USB_CH_IP_CUR_LVL_1P3           1300
 124 #define USB_CH_IP_CUR_LVL_1P4           1400
 125 #define USB_CH_IP_CUR_LVL_1P5           1500
 126
 127 #define VBAT_TRESH_IP_CUR_RED           3800
 128
 129 #define to_ab8500_charger_usb_device_info(x) container_of((x), \
 130         struct ab8500_charger, usb_chg)
 131 #define to_ab8500_charger_ac_device_info(x) container_of((x), \
 132         struct ab8500_charger, ac_chg)
 133
 134 /**
 135  * struct ab8500_charger_interrupts - ab8500 interupts
 136  * @name:       name of the interrupt
 137  * @isr         function pointer to the isr
 138  */
 139 struct ab8500_charger_interrupts {
 140         char *name;
 141         irqreturn_t (*isr)(int irq, void *data);
 142 };
 143
 144 struct ab8500_charger_info {
 145         int charger_connected;
 146         int charger_online;
 147         int charger_voltage;
 148         int cv_active;
 149         bool wd_expired;
 150 };
 151
 152 struct ab8500_charger_event_flags {
 153         bool mainextchnotok;
 154         bool main_thermal_prot;
 155         bool usb_thermal_prot;
 156         bool vbus_ovv;
 157         bool usbchargernotok;
 158         bool chgwdexp;
 159         bool vbus_collapse;
 160 };
 161
 162 struct ab8500_charger_usb_state {
 163         bool usb_changed;
 164         int usb_current;
 165         enum ab8500_usb_state state;
 166         spinlock_t usb_lock;
 167 };
 168
 169 /**
 170  * struct ab8500_charger - ab8500 Charger device information
 171  * @dev:                Pointer to the structure device
 172  * @max_usb_in_curr:    Max USB charger input current
 173  * @vbus_detected:      VBUS detected
 174  * @vbus_detected_start:
 175  *                      VBUS detected during startup
 176  * @ac_conn:            This will be true when the AC charger has been plugged
 177  * @vddadc_en_ac:       Indicate if VDD ADC supply is enabled because AC
 178  *                      charger is enabled
 179  * @vddadc_en_usb:      Indicate if VDD ADC supply is enabled because USB
 180  *                      charger is enabled
 181  * @vbat                Battery voltage
 182  * @old_vbat            Previously measured battery voltage
 183  * @autopower           Indicate if we should have automatic pwron after pwrloss
 184  * @parent:             Pointer to the struct ab8500
 185  * @gpadc:              Pointer to the struct gpadc
 186  * @pdata:              Pointer to the abx500_charger platform data
 187  * @bat:                Pointer to the abx500_bm platform data
 188  * @flags:              Structure for information about events triggered
 189  * @usb_state:          Structure for usb stack information
 190  * @ac_chg:             AC charger power supply
 191  * @usb_chg:            USB charger power supply
 192  * @ac:                 Structure that holds the AC charger properties
 193  * @usb:                Structure that holds the USB charger properties
 194  * @regu:               Pointer to the struct regulator
 195  * @charger_wq:         Work queue for the IRQs and checking HW state
 196  * @check_vbat_work     Work for checking vbat threshold to adjust vbus current
 197  * @check_hw_failure_work:      Work for checking HW state
 198  * @check_usbchgnotok_work:     Work for checking USB charger not ok status
 199  * @kick_wd_work:               Work for kicking the charger watchdog in case
 200  *                              of ABB rev 1.* due to the watchog logic bug
 201  * @ac_work:                    Work for checking AC charger connection
 202  * @detect_usb_type_work:       Work for detecting the USB type connected
 203  * @usb_link_status_work:       Work for checking the new USB link status
 204  * @usb_state_changed_work:     Work for checking USB state
 205  * @check_main_thermal_prot_work:
 206  *                              Work for checking Main thermal status
 207  * @check_usb_thermal_prot_work:
 208  *                              Work for checking USB thermal status
 209  */
 210 struct ab8500_charger {
 211         struct device *dev;
 212         int max_usb_in_curr;
 213         bool vbus_detected;
 214         bool vbus_detected_start;
 215         bool ac_conn;
 216         bool vddadc_en_ac;
 217         bool vddadc_en_usb;
 218         int vbat;
 219         int old_vbat;
 220         bool autopower;
 221         struct ab8500 *parent;
 222         struct ab8500_gpadc *gpadc;
 223         struct abx500_charger_platform_data *pdata;
 224         struct abx500_bm_data *bat;
 225         struct ab8500_charger_event_flags flags;
 226         struct ab8500_charger_usb_state usb_state;
 227         struct ux500_charger ac_chg;
 228         struct ux500_charger usb_chg;
 229         struct ab8500_charger_info ac;
 230         struct ab8500_charger_info usb;
 231         struct regulator *regu;
 232         struct workqueue_struct *charger_wq;
 233         struct delayed_work check_vbat_work;
 234         struct delayed_work check_hw_failure_work;
 235         struct delayed_work check_usbchgnotok_work;
 236         struct delayed_work kick_wd_work;
 237         struct work_struct ac_work;
 238         struct work_struct detect_usb_type_work;
 239         struct work_struct usb_link_status_work;
 240         struct work_struct usb_state_changed_work;
 241         struct work_struct check_main_thermal_prot_work;
 242         struct work_struct check_usb_thermal_prot_work;
 243         struct usb_phy *usb_phy;
 244         struct notifier_block nb;
 245 };
 246
 247 /* AC properties */
 248 static enum power_supply_property ab8500_charger_ac_props[] = {
 249         POWER_SUPPLY_PROP_HEALTH,
 250         POWER_SUPPLY_PROP_PRESENT,
 251         POWER_SUPPLY_PROP_ONLINE,
 252         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 253         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 254         POWER_SUPPLY_PROP_CURRENT_NOW,
 255 };
 256
 257 /* USB properties */
 258 static enum power_supply_property ab8500_charger_usb_props[] = {
 259         POWER_SUPPLY_PROP_HEALTH,
 260         POWER_SUPPLY_PROP_CURRENT_AVG,
 261         POWER_SUPPLY_PROP_PRESENT,
 262         POWER_SUPPLY_PROP_ONLINE,
 263         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 264         POWER_SUPPLY_PROP_VOLTAGE_AVG,
 265         POWER_SUPPLY_PROP_CURRENT_NOW,
 266 };
 267
 268 /**
 269  * ab8500_power_loss_handling - set how we handle powerloss.
 270  * @di:         pointer to the ab8500_charger structure
 271  *
 272  * Magic nummbers are from STE HW department.
 273  */
 274 static void ab8500_power_loss_handling(struct ab8500_charger *di)
 275 {
 276         u8 reg;
 277         int ret;
 278
 279         dev_dbg(di->dev, "Autopower : %d\n", di->autopower);
 280
 281         /* read the autopower register */
 282         ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, &reg);
 283         if (ret) {
 284                 dev_err(di->dev, "%d write failed\n", __LINE__);
 285                 return;
 286         }
 287
 288         /* enable the OPT emulation registers */
 289         ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
 290         if (ret) {
 291                 dev_err(di->dev, "%d write failed\n", __LINE__);
 292                 return;
 293         }
 294
 295         if (di->autopower)
 296                 reg |= 0x8;
 297         else
 298                 reg &= ~0x8;
 299
 300         /* write back the changed value to autopower reg */
 301         ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
 302         if (ret) {
 303                 dev_err(di->dev, "%d write failed\n", __LINE__);
 304                 return;
 305         }
 306
 307         /* disable the set OTP registers again */
 308         ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
 309         if (ret) {
 310                 dev_err(di->dev, "%d write failed\n", __LINE__);
 311                 return;
 312         }
 313 }
 314
 315 /**
 316  * ab8500_power_supply_changed - a wrapper with local extentions for
 317  * power_supply_changed
 318  * @di:   pointer to the ab8500_charger structure
 319  * @psy:  pointer to power_supply_that have changed.
 320  *
 321  */
 322 static void ab8500_power_supply_changed(struct ab8500_charger *di,
 323                                         struct power_supply *psy)
 324 {
 325         if (di->pdata->autopower_cfg) {
 326                 if (!di->usb.charger_connected &&
 327                     !di->ac.charger_connected &&
 328                     di->autopower) {
 329                         di->autopower = false;
 330                         ab8500_power_loss_handling(di);
 331                 } else if (!di->autopower &&
 332                            (di->ac.charger_connected ||
 333                             di->usb.charger_connected)) {
 334                         di->autopower = true;
 335                         ab8500_power_loss_handling(di);
 336                 }
 337         }
 338         power_supply_changed(psy);
 339 }
 340
 341 static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
 342         bool connected)
 343 {
 344         if (connected != di->usb.charger_connected) {
 345                 dev_dbg(di->dev, "USB connected:%i\n", connected);
 346                 di->usb.charger_connected = connected;
 347                 sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
 348         }
 349 }
 350
 351 /**
 352  * ab8500_charger_get_ac_voltage() - get ac charger voltage
 353  * @di:         pointer to the ab8500_charger structure
 354  *
 355  * Returns ac charger voltage (on success)
 356  */
 357 static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
 358 {
 359         int vch;
 360
 361         /* Only measure voltage if the charger is connected */
 362         if (di->ac.charger_connected) {
 363                 vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
 364                 if (vch < 0)
 365                         dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
 366         } else {
 367                 vch = 0;
 368         }
 369         return vch;
 370 }
 371
 372 /**
 373  * ab8500_charger_ac_cv() - check if the main charger is in CV mode
 374  * @di:         pointer to the ab8500_charger structure
 375  *
 376  * Returns ac charger CV mode (on success) else error code
 377  */
 378 static int ab8500_charger_ac_cv(struct ab8500_charger *di)
 379 {
 380         u8 val;
 381         int ret = 0;
 382
 383         /* Only check CV mode if the charger is online */
 384         if (di->ac.charger_online) {
 385                 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 386                         AB8500_CH_STATUS1_REG, &val);
 387                 if (ret < 0) {
 388                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 389                         return 0;
 390                 }
 391
 392                 if (val & MAIN_CH_CV_ON)
 393                         ret = 1;
 394                 else
 395                         ret = 0;
 396         }
 397
 398         return ret;
 399 }
 400
 401 /**
 402  * ab8500_charger_get_vbus_voltage() - get vbus voltage
 403  * @di:         pointer to the ab8500_charger structure
 404  *
 405  * This function returns the vbus voltage.
 406  * Returns vbus voltage (on success)
 407  */
 408 static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
 409 {
 410         int vch;
 411
 412         /* Only measure voltage if the charger is connected */
 413         if (di->usb.charger_connected) {
 414                 vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
 415                 if (vch < 0)
 416                         dev_err(di->dev, "%s gpadc conv failed\n", __func__);
 417         } else {
 418                 vch = 0;
 419         }
 420         return vch;
 421 }
 422
 423 /**
 424  * ab8500_charger_get_usb_current() - get usb charger current
 425  * @di:         pointer to the ab8500_charger structure
 426  *
 427  * This function returns the usb charger current.
 428  * Returns usb current (on success) and error code on failure
 429  */
 430 static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
 431 {
 432         int ich;
 433
 434         /* Only measure current if the charger is online */
 435         if (di->usb.charger_online) {
 436                 ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
 437                 if (ich < 0)
 438                         dev_err(di->dev, "%s gpadc conv failed\n", __func__);
 439         } else {
 440                 ich = 0;
 441         }
 442         return ich;
 443 }
 444
 445 /**
 446  * ab8500_charger_get_ac_current() - get ac charger current
 447  * @di:         pointer to the ab8500_charger structure
 448  *
 449  * This function returns the ac charger current.
 450  * Returns ac current (on success) and error code on failure.
 451  */
 452 static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
 453 {
 454         int ich;
 455
 456         /* Only measure current if the charger is online */
 457         if (di->ac.charger_online) {
 458                 ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
 459                 if (ich < 0)
 460                         dev_err(di->dev, "%s gpadc conv failed\n", __func__);
 461         } else {
 462                 ich = 0;
 463         }
 464         return ich;
 465 }
 466
 467 /**
 468  * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
 469  * @di:         pointer to the ab8500_charger structure
 470  *
 471  * Returns ac charger CV mode (on success) else error code
 472  */
 473 static int ab8500_charger_usb_cv(struct ab8500_charger *di)
 474 {
 475         int ret;
 476         u8 val;
 477
 478         /* Only check CV mode if the charger is online */
 479         if (di->usb.charger_online) {
 480                 ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 481                         AB8500_CH_USBCH_STAT1_REG, &val);
 482                 if (ret < 0) {
 483                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 484                         return 0;
 485                 }
 486
 487                 if (val & USB_CH_CV_ON)
 488                         ret = 1;
 489                 else
 490                         ret = 0;
 491         } else {
 492                 ret = 0;
 493         }
 494
 495         return ret;
 496 }
 497
 498 /**
 499  * ab8500_charger_detect_chargers() - Detect the connected chargers
 500  * @di:         pointer to the ab8500_charger structure
 501  *
 502  * Returns the type of charger connected.
 503  * For USB it will not mean we can actually charge from it
 504  * but that there is a USB cable connected that we have to
 505  * identify. This is used during startup when we don't get
 506  * interrupts of the charger detection
 507  *
 508  * Returns an integer value, that means,
 509  * NO_PW_CONN  no power supply is connected
 510  * AC_PW_CONN  if the AC power supply is connected
 511  * USB_PW_CONN  if the USB power supply is connected
 512  * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
 513  */
 514 static int ab8500_charger_detect_chargers(struct ab8500_charger *di)
 515 {
 516         int result = NO_PW_CONN;
 517         int ret;
 518         u8 val;
 519
 520         /* Check for AC charger */
 521         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 522                 AB8500_CH_STATUS1_REG, &val);
 523         if (ret < 0) {
 524                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 525                 return ret;
 526         }
 527
 528         if (val & MAIN_CH_DET)
 529                 result = AC_PW_CONN;
 530
 531         /* Check for USB charger */
 532         ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
 533                 AB8500_CH_USBCH_STAT1_REG, &val);
 534         if (ret < 0) {
 535                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 536                 return ret;
 537         }
 538
 539         if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
 540                 result |= USB_PW_CONN;
 541
 542         return result;
 543 }
 544
 545 /**
 546  * ab8500_charger_max_usb_curr() - get the max curr for the USB type
 547  * @di:                 pointer to the ab8500_charger structure
 548  * @link_status:        the identified USB type
 549  *
 550  * Get the maximum current that is allowed to be drawn from the host
 551  * based on the USB type.
 552  * Returns error code in case of failure else 0 on success
 553  */
 554 static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
 555         enum ab8500_charger_link_status link_status)
 556 {
 557         int ret = 0;
 558
 559         switch (link_status) {
 560         case USB_STAT_STD_HOST_NC:
 561         case USB_STAT_STD_HOST_C_NS:
 562         case USB_STAT_STD_HOST_C_S:
 563                 dev_dbg(di->dev, "USB Type - Standard host is "
 564                         "detected through USB driver\n");
 565                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
 566                 break;
 567         case USB_STAT_HOST_CHG_HS_CHIRP:
 568                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
 569                 break;
 570         case USB_STAT_HOST_CHG_HS:
 571         case USB_STAT_ACA_RID_C_HS:
 572                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9;
 573                 break;
 574         case USB_STAT_ACA_RID_A:
 575                 /*
 576                  * Dedicated charger level minus maximum current accessory
 577                  * can consume (300mA). Closest level is 1100mA
 578                  */
 579                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1;
 580                 break;
 581         case USB_STAT_ACA_RID_B:
 582                 /*
 583                  * Dedicated charger level minus 120mA (20mA for ACA and
 584                  * 100mA for potential accessory). Closest level is 1300mA
 585                  */
 586                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3;
 587                 break;
 588         case USB_STAT_DEDICATED_CHG:
 589         case USB_STAT_HOST_CHG_NM:
 590         case USB_STAT_ACA_RID_C_HS_CHIRP:
 591         case USB_STAT_ACA_RID_C_NM:
 592                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5;
 593                 break;
 594         case USB_STAT_RESERVED:
 595                 /*
 596                  * This state is used to indicate that VBUS has dropped below
 597                  * the detection level 4 times in a row. This is due to the
 598                  * charger output current is set to high making the charger
 599                  * voltage collapse. This have to be propagated through to
 600                  * chargalg. This is done using the property
 601                  * POWER_SUPPLY_PROP_CURRENT_AVG = 1
 602                  */
 603                 di->flags.vbus_collapse = true;
 604                 dev_dbg(di->dev, "USB Type - USB_STAT_RESERVED "
 605                         "VBUS has collapsed\n");
 606                 ret = -1;
 607                 break;
 608         case USB_STAT_HM_IDGND:
 609         case USB_STAT_NOT_CONFIGURED:
 610         case USB_STAT_NOT_VALID_LINK:
 611                 dev_err(di->dev, "USB Type - Charging not allowed\n");
 612                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
 613                 ret = -ENXIO;
 614                 break;
 615         default:
 616                 dev_err(di->dev, "USB Type - Unknown\n");
 617                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
 618                 ret = -ENXIO;
 619                 break;
 620         };
 621
 622         dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
 623                 link_status, di->max_usb_in_curr);
 624
 625         return ret;
 626 }
 627
 628 /**
 629  * ab8500_charger_read_usb_type() - read the type of usb connected
 630  * @di:         pointer to the ab8500_charger structure
 631  *
 632  * Detect the type of the plugged USB
 633  * Returns error code in case of failure else 0 on success
 634  */
 635 static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
 636 {
 637         int ret;
 638         u8 val;
 639
 640         ret = abx500_get_register_interruptible(di->dev,
 641                 AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
 642         if (ret < 0) {
 643                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 644                 return ret;
 645         }
 646         ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
 647                 AB8500_USB_LINE_STAT_REG, &val);
 648         if (ret < 0) {
 649                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 650                 return ret;
 651         }
 652
 653         /* get the USB type */
 654         val = (val & AB8500_USB_LINK_STATUS) >> 3;
 655         ret = ab8500_charger_max_usb_curr(di,
 656                 (enum ab8500_charger_link_status) val);
 657
 658         return ret;
 659 }
 660
 661 /**
 662  * ab8500_charger_detect_usb_type() - get the type of usb connected
 663  * @di:         pointer to the ab8500_charger structure
 664  *
 665  * Detect the type of the plugged USB
 666  * Returns error code in case of failure else 0 on success
 667  */
 668 static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
 669 {
 670         int i, ret;
 671         u8 val;
 672
 673         /*
 674          * On getting the VBUS rising edge detect interrupt there
 675          * is a 250ms delay after which the register UsbLineStatus
 676          * is filled with valid data.
 677          */
 678         for (i = 0; i < 10; i++) {
 679                 msleep(250);
 680                 ret = abx500_get_register_interruptible(di->dev,
 681                         AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
 682                         &val);
 683                 if (ret < 0) {
 684                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 685                         return ret;
 686                 }
 687                 ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
 688                         AB8500_USB_LINE_STAT_REG, &val);
 689                 if (ret < 0) {
 690                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
 691                         return ret;
 692                 }
 693                 /*
 694                  * Until the IT source register is read the UsbLineStatus
 695                  * register is not updated, hence doing the same
 696                  * Revisit this:
 697                  */
 698
 699                 /* get the USB type */
 700                 val = (val & AB8500_USB_LINK_STATUS) >> 3;
 701                 if (val)
 702                         break;
 703         }
 704         ret = ab8500_charger_max_usb_curr(di,
 705                 (enum ab8500_charger_link_status) val);
 706
 707         return ret;
 708 }
 709
 710 /*
 711  * This array maps the raw hex value to charger voltage used by the AB8500
 712  * Values taken from the UM0836
 713  */
 714 static int ab8500_charger_voltage_map[] = {
 715         3500 ,
 716         3525 ,
 717         3550 ,
 718         3575 ,
 719         3600 ,
 720         3625 ,
 721         3650 ,
 722         3675 ,
 723         3700 ,
 724         3725 ,
 725         3750 ,
 726         3775 ,
 727         3800 ,
 728         3825 ,
 729         3850 ,
 730         3875 ,
 731         3900 ,
 732         3925 ,
 733         3950 ,
 734         3975 ,
 735         4000 ,
 736         4025 ,
 737         4050 ,
 738         4060 ,
 739         4070 ,
 740         4080 ,
 741         4090 ,
 742         4100 ,
 743         4110 ,
 744         4120 ,
 745         4130 ,
 746         4140 ,
 747         4150 ,
 748         4160 ,
 749         4170 ,
 750         4180 ,
 751         4190 ,
 752         4200 ,
 753         4210 ,
 754         4220 ,
 755         4230 ,
 756         4240 ,
 757         4250 ,
 758         4260 ,
 759         4270 ,
 760         4280 ,
 761         4290 ,
 762         4300 ,
 763         4310 ,
 764         4320 ,
 765         4330 ,
 766         4340 ,
 767         4350 ,
 768         4360 ,
 769         4370 ,
 770         4380 ,
 771         4390 ,
 772         4400 ,
 773         4410 ,
 774         4420 ,
 775         4430 ,
 776         4440 ,
 777         4450 ,
 778         4460 ,
 779         4470 ,
 780         4480 ,
 781         4490 ,
 782         4500 ,
 783         4510 ,
 784         4520 ,
 785         4530 ,
 786         4540 ,
 787         4550 ,
 788         4560 ,
 789         4570 ,
 790         4580 ,
 791         4590 ,
 792         4600 ,
 793 };
 794
 795 /*
 796  * This array maps the raw hex value to charger current used by the AB8500
 797  * Values taken from the UM0836
 798  */
 799 static int ab8500_charger_current_map[] = {
 800         100 ,
 801         200 ,
 802         300 ,
 803         400 ,
 804         500 ,
 805         600 ,
 806         700 ,
 807         800 ,
 808         900 ,
 809         1000 ,
 810         1100 ,
 811         1200 ,
 812         1300 ,
 813         1400 ,
 814         1500 ,
 815 };
 816
 817 /*
 818  * This array maps the raw hex value to VBUS input current used by the AB8500
 819  * Values taken from the UM0836
 820  */
 821 static int ab8500_charger_vbus_in_curr_map[] = {
 822         USB_CH_IP_CUR_LVL_0P05,
 823         USB_CH_IP_CUR_LVL_0P09,
 824         USB_CH_IP_CUR_LVL_0P19,
 825         USB_CH_IP_CUR_LVL_0P29,
 826         USB_CH_IP_CUR_LVL_0P38,
 827         USB_CH_IP_CUR_LVL_0P45,
 828         USB_CH_IP_CUR_LVL_0P5,
 829         USB_CH_IP_CUR_LVL_0P6,
 830         USB_CH_IP_CUR_LVL_0P7,
 831         USB_CH_IP_CUR_LVL_0P8,
 832         USB_CH_IP_CUR_LVL_0P9,
 833         USB_CH_IP_CUR_LVL_1P0,
 834         USB_CH_IP_CUR_LVL_1P1,
 835         USB_CH_IP_CUR_LVL_1P3,
 836         USB_CH_IP_CUR_LVL_1P4,
 837         USB_CH_IP_CUR_LVL_1P5,
 838 };
 839
 840 static int ab8500_voltage_to_regval(int voltage)
 841 {
 842         int i;
 843
 844         /* Special case for voltage below 3.5V */
 845         if (voltage < ab8500_charger_voltage_map[0])
 846                 return LOW_VOLT_REG;
 847
 848         for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
 849                 if (voltage < ab8500_charger_voltage_map[i])
 850                         return i - 1;
 851         }
 852
 853         /* If not last element, return error */
 854         i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
 855         if (voltage == ab8500_charger_voltage_map[i])
 856                 return i;
 857         else
 858                 return -1;
 859 }
 860
 861 static int ab8500_current_to_regval(int curr)
 862 {
 863         int i;
 864
 865         if (curr < ab8500_charger_current_map[0])
 866                 return 0;
 867
 868         for (i = 0; i < ARRAY_SIZE(ab8500_charger_current_map); i++) {
 869                 if (curr < ab8500_charger_current_map[i])
 870                         return i - 1;
 871         }
 872
 873         /* If not last element, return error */
 874         i = ARRAY_SIZE(ab8500_charger_current_map) - 1;
 875         if (curr == ab8500_charger_current_map[i])
 876                 return i;
 877         else
 878                 return -1;
 879 }
 880
 881 static int ab8500_vbus_in_curr_to_regval(int curr)
 882 {
 883         int i;
 884
 885         if (curr < ab8500_charger_vbus_in_curr_map[0])
 886                 return 0;
 887
 888         for (i = 0; i < ARRAY_SIZE(ab8500_charger_vbus_in_curr_map); i++) {
 889                 if (curr < ab8500_charger_vbus_in_curr_map[i])
 890                         return i - 1;
 891         }
 892
 893         /* If not last element, return error */
 894         i = ARRAY_SIZE(ab8500_charger_vbus_in_curr_map) - 1;
 895         if (curr == ab8500_charger_vbus_in_curr_map[i])
 896                 return i;
 897         else
 898                 return -1;
 899 }
 900
 901 /**
 902  * ab8500_charger_get_usb_cur() - get usb current
 903  * @di:         pointer to the ab8500_charger structre
 904  *
 905  * The usb stack provides the maximum current that can be drawn from
 906  * the standard usb host. This will be in mA.
 907  * This function converts current in mA to a value that can be written
 908  * to the register. Returns -1 if charging is not allowed
 909  */
 910 static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
 911 {
 912         switch (di->usb_state.usb_current) {
 913         case 100:
 914                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09;
 915                 break;
 916         case 200:
 917                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19;
 918                 break;
 919         case 300:
 920                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29;
 921                 break;
 922         case 400:
 923                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38;
 924                 break;
 925         case 500:
 926                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5;
 927                 break;
 928         default:
 929                 di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05;
 930                 return -1;
 931                 break;
 932         };
 933         return 0;
 934 }
 935
 936 /**
 937  * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
 938  * @di:         pointer to the ab8500_charger structure
 939  * @ich_in:     charger input current limit
 940  *
 941  * Sets the current that can be drawn from the USB host
 942  * Returns error code in case of failure else 0(on success)
 943  */
 944 static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
 945                 int ich_in)
 946 {
 947         int ret;
 948         int input_curr_index;
 949         int min_value;
 950
 951         /* We should always use to lowest current limit */
 952         min_value = min(di->bat->chg_params->usb_curr_max, ich_in);
 953
 954         switch (min_value) {
 955         case 100:
 956                 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
 957                         min_value = USB_CH_IP_CUR_LVL_0P05;
 958                 break;
 959         case 500:
 960                 if (di->vbat < VBAT_TRESH_IP_CUR_RED)
 961                         min_value = USB_CH_IP_CUR_LVL_0P45;
 962                 break;
 963         default:
 964                 break;
 965         }
 966
 967         input_curr_index = ab8500_vbus_in_curr_to_regval(min_value);
 968         if (input_curr_index < 0) {
 969                 dev_err(di->dev, "VBUS input current limit too high\n");
 970                 return -ENXIO;
 971         }
 972
 973         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
 974                 AB8500_USBCH_IPT_CRNTLVL_REG,
 975                 input_curr_index << VBUS_IN_CURR_LIM_SHIFT);
 976         if (ret)
 977                 dev_err(di->dev, "%s write failed\n", __func__);
 978
 979         return ret;
 980 }
 981
 982 /**
 983  * ab8500_charger_led_en() - turn on/off chargign led
 984  * @di:         pointer to the ab8500_charger structure
 985  * @on:         flag to turn on/off the chargign led
 986  *
 987  * Power ON/OFF charging LED indication
 988  * Returns error code in case of failure else 0(on success)
 989  */
 990 static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
 991 {
 992         int ret;
 993
 994         if (on) {
 995                 /* Power ON charging LED indicator, set LED current to 5mA */
 996                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
 997                         AB8500_LED_INDICATOR_PWM_CTRL,
 998                         (LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
 999                 if (ret) {
1000                         dev_err(di->dev, "Power ON LED failed\n");
1001                         return ret;
1002                 }
1003                 /* LED indicator PWM duty cycle 252/256 */
1004                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1005                         AB8500_LED_INDICATOR_PWM_DUTY,
1006                         LED_INDICATOR_PWM_DUTY_252_256);
1007                 if (ret) {
1008                         dev_err(di->dev, "Set LED PWM duty cycle failed\n");
1009                         return ret;
1010                 }
1011         } else {
1012                 /* Power off charging LED indicator */
1013                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1014                         AB8500_LED_INDICATOR_PWM_CTRL,
1015                         LED_INDICATOR_PWM_DIS);
1016                 if (ret) {
1017                         dev_err(di->dev, "Power-off LED failed\n");
1018                         return ret;
1019                 }
1020         }
1021
1022         return ret;
1023 }
1024
1025 /**
1026  * ab8500_charger_ac_en() - enable or disable ac charging
1027  * @di:         pointer to the ab8500_charger structure
1028  * @enable:     enable/disable flag
1029  * @vset:       charging voltage
1030  * @iset:       charging current
1031  *
1032  * Enable/Disable AC/Mains charging and turns on/off the charging led
1033  * respectively.
1034  **/
1035 static int ab8500_charger_ac_en(struct ux500_charger *charger,
1036         int enable, int vset, int iset)
1037 {
1038         int ret;
1039         int volt_index;
1040         int curr_index;
1041         int input_curr_index;
1042         u8 overshoot = 0;
1043
1044         struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);
1045
1046         if (enable) {
1047                 /* Check if AC is connected */
1048                 if (!di->ac.charger_connected) {
1049                         dev_err(di->dev, "AC charger not connected\n");
1050                         return -ENXIO;
1051                 }
1052
1053                 /* Enable AC charging */
1054                 dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);
1055
1056                 /*
1057                  * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1058                  * will be triggered everytime we enable the VDD ADC supply.
1059                  * This will turn off charging for a short while.
1060                  * It can be avoided by having the supply on when
1061                  * there is a charger enabled. Normally the VDD ADC supply
1062                  * is enabled everytime a GPADC conversion is triggered. We will
1063                  * force it to be enabled from this driver to have
1064                  * the GPADC module independant of the AB8500 chargers
1065                  */
1066                 if (!di->vddadc_en_ac) {
1067                         regulator_enable(di->regu);
1068                         di->vddadc_en_ac = true;
1069                 }
1070
1071                 /* Check if the requested voltage or current is valid */
1072                 volt_index = ab8500_voltage_to_regval(vset);
1073                 curr_index = ab8500_current_to_regval(iset);
1074                 input_curr_index = ab8500_current_to_regval(
1075                         di->bat->chg_params->ac_curr_max);
1076                 if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
1077                         dev_err(di->dev,
1078                                 "Charger voltage or current too high, "
1079                                 "charging not started\n");
1080                         return -ENXIO;
1081                 }
1082
1083                 /* ChVoltLevel: maximum battery charging voltage */
1084                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1085                         AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1086                 if (ret) {
1087                         dev_err(di->dev, "%s write failed\n", __func__);
1088                         return ret;
1089                 }
1090                 /* MainChInputCurr: current that can be drawn from the charger*/
1091                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1092                         AB8500_MCH_IPT_CURLVL_REG,
1093                         input_curr_index << MAIN_CH_INPUT_CURR_SHIFT);
1094                 if (ret) {
1095                         dev_err(di->dev, "%s write failed\n", __func__);
1096                         return ret;
1097                 }
1098                 /* ChOutputCurentLevel: protected output current */
1099                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1100                         AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
1101                 if (ret) {
1102                         dev_err(di->dev, "%s write failed\n", __func__);
1103                         return ret;
1104                 }
1105
1106                 /* Check if VBAT overshoot control should be enabled */
1107                 if (!di->bat->enable_overshoot)
1108                         overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;
1109
1110                 /* Enable Main Charger */
1111                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1112                         AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
1113                 if (ret) {
1114                         dev_err(di->dev, "%s write failed\n", __func__);
1115                         return ret;
1116                 }
1117
1118                 /* Power on charging LED indication */
1119                 ret = ab8500_charger_led_en(di, true);
1120                 if (ret < 0)
1121                         dev_err(di->dev, "failed to enable LED\n");
1122
1123                 di->ac.charger_online = 1;
1124         } else {
1125                 /* Disable AC charging */
1126                 if (is_ab8500_1p1_or_earlier(di->parent)) {
1127                         /*
1128                          * For ABB revision 1.0 and 1.1 there is a bug in the
1129                          * watchdog logic. That means we have to continously
1130                          * kick the charger watchdog even when no charger is
1131                          * connected. This is only valid once the AC charger
1132                          * has been enabled. This is a bug that is not handled
1133                          * by the algorithm and the watchdog have to be kicked
1134                          * by the charger driver when the AC charger
1135                          * is disabled
1136                          */
1137                         if (di->ac_conn) {
1138                                 queue_delayed_work(di->charger_wq,
1139                                         &di->kick_wd_work,
1140                                         round_jiffies(WD_KICK_INTERVAL));
1141                         }
1142
1143                         /*
1144                          * We can't turn off charging completely
1145                          * due to a bug in AB8500 cut1.
1146                          * If we do, charging will not start again.
1147                          * That is why we set the lowest voltage
1148                          * and current possible
1149                          */
1150                         ret = abx500_set_register_interruptible(di->dev,
1151                                 AB8500_CHARGER,
1152                                 AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
1153                         if (ret) {
1154                                 dev_err(di->dev,
1155                                         "%s write failed\n", __func__);
1156                                 return ret;
1157                         }
1158
1159                         ret = abx500_set_register_interruptible(di->dev,
1160                                 AB8500_CHARGER,
1161                                 AB8500_CH_OPT_CRNTLVL_REG, CH_OP_CUR_LVL_0P1);
1162                         if (ret) {
1163                                 dev_err(di->dev,
1164                                         "%s write failed\n", __func__);
1165                                 return ret;
1166                         }
1167                 } else {
1168                         ret = abx500_set_register_interruptible(di->dev,
1169                                 AB8500_CHARGER,
1170                                 AB8500_MCH_CTRL1, 0);
1171                         if (ret) {
1172                                 dev_err(di->dev,
1173                                         "%s write failed\n", __func__);
1174                                 return ret;
1175                         }
1176                 }
1177
1178                 ret = ab8500_charger_led_en(di, false);
1179                 if (ret < 0)
1180                         dev_err(di->dev, "failed to disable LED\n");
1181
1182                 di->ac.charger_online = 0;
1183                 di->ac.wd_expired = false;
1184
1185                 /* Disable regulator if enabled */
1186                 if (di->vddadc_en_ac) {
1187                         regulator_disable(di->regu);
1188                         di->vddadc_en_ac = false;
1189                 }
1190
1191                 dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
1192         }
1193         ab8500_power_supply_changed(di, &di->ac_chg.psy);
1194
1195         return ret;
1196 }
1197
1198 /**
1199  * ab8500_charger_usb_en() - enable usb charging
1200  * @di:         pointer to the ab8500_charger structure
1201  * @enable:     enable/disable flag
1202  * @vset:       charging voltage
1203  * @ich_out:    charger output current
1204  *
1205  * Enable/Disable USB charging and turns on/off the charging led respectively.
1206  * Returns error code in case of failure else 0(on success)
1207  */
1208 static int ab8500_charger_usb_en(struct ux500_charger *charger,
1209         int enable, int vset, int ich_out)
1210 {
1211         int ret;
1212         int volt_index;
1213         int curr_index;
1214         u8 overshoot = 0;
1215
1216         struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);
1217
1218         if (enable) {
1219                 /* Check if USB is connected */
1220                 if (!di->usb.charger_connected) {
1221                         dev_err(di->dev, "USB charger not connected\n");
1222                         return -ENXIO;
1223                 }
1224
1225                 /*
1226                  * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
1227                  * will be triggered everytime we enable the VDD ADC supply.
1228                  * This will turn off charging for a short while.
1229                  * It can be avoided by having the supply on when
1230                  * there is a charger enabled. Normally the VDD ADC supply
1231                  * is enabled everytime a GPADC conversion is triggered. We will
1232                  * force it to be enabled from this driver to have
1233                  * the GPADC module independant of the AB8500 chargers
1234                  */
1235                 if (!di->vddadc_en_usb) {
1236                         regulator_enable(di->regu);
1237                         di->vddadc_en_usb = true;
1238                 }
1239
1240                 /* Enable USB charging */
1241                 dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);
1242
1243                 /* Check if the requested voltage or current is valid */
1244                 volt_index = ab8500_voltage_to_regval(vset);
1245                 curr_index = ab8500_current_to_regval(ich_out);
1246                 if (volt_index < 0 || curr_index < 0) {
1247                         dev_err(di->dev,
1248                                 "Charger voltage or current too high, "
1249                                 "charging not started\n");
1250                         return -ENXIO;
1251                 }
1252
1253                 /* ChVoltLevel: max voltage upto which battery can be charged */
1254                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1255                         AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
1256                 if (ret) {
1257                         dev_err(di->dev, "%s write failed\n", __func__);
1258                         return ret;
1259                 }
1260                 /* USBChInputCurr: current that can be drawn from the usb */
1261                 ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1262                 if (ret) {
1263                         dev_err(di->dev, "setting USBChInputCurr failed\n");
1264                         return ret;
1265                 }
1266                 /* ChOutputCurentLevel: protected output current */
1267                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1268                         AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
1269                 if (ret) {
1270                         dev_err(di->dev, "%s write failed\n", __func__);
1271                         return ret;
1272                 }
1273                 /* Check if VBAT overshoot control should be enabled */
1274                 if (!di->bat->enable_overshoot)
1275                         overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;
1276
1277                 /* Enable USB Charger */
1278                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1279                         AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
1280                 if (ret) {
1281                         dev_err(di->dev, "%s write failed\n", __func__);
1282                         return ret;
1283                 }
1284
1285                 /* If success power on charging LED indication */
1286                 ret = ab8500_charger_led_en(di, true);
1287                 if (ret < 0)
1288                         dev_err(di->dev, "failed to enable LED\n");
1289
1290                 queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);
1291
1292                 di->usb.charger_online = 1;
1293         } else {
1294                 /* Disable USB charging */
1295                 ret = abx500_set_register_interruptible(di->dev,
1296                         AB8500_CHARGER,
1297                         AB8500_USBCH_CTRL1_REG, 0);
1298                 if (ret) {
1299                         dev_err(di->dev,
1300                                 "%s write failed\n", __func__);
1301                         return ret;
1302                 }
1303
1304                 ret = ab8500_charger_led_en(di, false);
1305                 if (ret < 0)
1306                         dev_err(di->dev, "failed to disable LED\n");
1307
1308                 di->usb.charger_online = 0;
1309                 di->usb.wd_expired = false;
1310
1311                 /* Disable regulator if enabled */
1312                 if (di->vddadc_en_usb) {
1313                         regulator_disable(di->regu);
1314                         di->vddadc_en_usb = false;
1315                 }
1316
1317                 dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
1318
1319                 /* Cancel any pending Vbat check work */
1320                 if (delayed_work_pending(&di->check_vbat_work))
1321                         cancel_delayed_work(&di->check_vbat_work);
1322
1323         }
1324         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1325
1326         return ret;
1327 }
1328
1329 /**
1330  * ab8500_charger_watchdog_kick() - kick charger watchdog
1331  * @di:         pointer to the ab8500_charger structure
1332  *
1333  * Kick charger watchdog
1334  * Returns error code in case of failure else 0(on success)
1335  */
1336 static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
1337 {
1338         int ret;
1339         struct ab8500_charger *di;
1340
1341         if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1342                 di = to_ab8500_charger_ac_device_info(charger);
1343         else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1344                 di = to_ab8500_charger_usb_device_info(charger);
1345         else
1346                 return -ENXIO;
1347
1348         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1349                 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1350         if (ret)
1351                 dev_err(di->dev, "Failed to kick WD!\n");
1352
1353         return ret;
1354 }
1355
1356 /**
1357  * ab8500_charger_update_charger_current() - update charger current
1358  * @di:         pointer to the ab8500_charger structure
1359  *
1360  * Update the charger output current for the specified charger
1361  * Returns error code in case of failure else 0(on success)
1362  */
1363 static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
1364                 int ich_out)
1365 {
1366         int ret;
1367         int curr_index;
1368         struct ab8500_charger *di;
1369
1370         if (charger->psy.type == POWER_SUPPLY_TYPE_MAINS)
1371                 di = to_ab8500_charger_ac_device_info(charger);
1372         else if (charger->psy.type == POWER_SUPPLY_TYPE_USB)
1373                 di = to_ab8500_charger_usb_device_info(charger);
1374         else
1375                 return -ENXIO;
1376
1377         curr_index = ab8500_current_to_regval(ich_out);
1378         if (curr_index < 0) {
1379                 dev_err(di->dev,
1380                         "Charger current too high, "
1381                         "charging not started\n");
1382                 return -ENXIO;
1383         }
1384
1385         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1386                 AB8500_CH_OPT_CRNTLVL_REG, (u8) curr_index);
1387         if (ret) {
1388                 dev_err(di->dev, "%s write failed\n", __func__);
1389                 return ret;
1390         }
1391
1392         /* Reset the main and usb drop input current measurement counter */
1393         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1394                                 AB8500_CHARGER_CTRL,
1395                                 0x1);
1396         if (ret) {
1397                 dev_err(di->dev, "%s write failed\n", __func__);
1398                 return ret;
1399         }
1400
1401         return ret;
1402 }
1403
1404 static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
1405 {
1406         struct power_supply *psy;
1407         struct power_supply *ext;
1408         struct ab8500_charger *di;
1409         union power_supply_propval ret;
1410         int i, j;
1411         bool psy_found = false;
1412         struct ux500_charger *usb_chg;
1413
1414         usb_chg = (struct ux500_charger *)data;
1415         psy = &usb_chg->psy;
1416
1417         di = to_ab8500_charger_usb_device_info(usb_chg);
1418
1419         ext = dev_get_drvdata(dev);
1420
1421         /* For all psy where the driver name appears in any supplied_to */
1422         for (i = 0; i < ext->num_supplicants; i++) {
1423                 if (!strcmp(ext->supplied_to[i], psy->name))
1424                         psy_found = true;
1425         }
1426
1427         if (!psy_found)
1428                 return 0;
1429
1430         /* Go through all properties for the psy */
1431         for (j = 0; j < ext->num_properties; j++) {
1432                 enum power_supply_property prop;
1433                 prop = ext->properties[j];
1434
1435                 if (ext->get_property(ext, prop, &ret))
1436                         continue;
1437
1438                 switch (prop) {
1439                 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1440                         switch (ext->type) {
1441                         case POWER_SUPPLY_TYPE_BATTERY:
1442                                 di->vbat = ret.intval / 1000;
1443                                 break;
1444                         default:
1445                                 break;
1446                         }
1447                         break;
1448                 default:
1449                         break;
1450                 }
1451         }
1452         return 0;
1453 }
1454
1455 /**
1456  * ab8500_charger_check_vbat_work() - keep vbus current within spec
1457  * @work        pointer to the work_struct structure
1458  *
1459  * Due to a asic bug it is necessary to lower the input current to the vbus
1460  * charger when charging with at some specific levels. This issue is only valid
1461  * for below a certain battery voltage. This function makes sure that the
1462  * the allowed current limit isn't exceeded.
1463  */
1464 static void ab8500_charger_check_vbat_work(struct work_struct *work)
1465 {
1466         int t = 10;
1467         struct ab8500_charger *di = container_of(work,
1468                 struct ab8500_charger, check_vbat_work.work);
1469
1470         class_for_each_device(power_supply_class, NULL,
1471                 &di->usb_chg.psy, ab8500_charger_get_ext_psy_data);
1472
1473         /* First run old_vbat is 0. */
1474         if (di->old_vbat == 0)
1475                 di->old_vbat = di->vbat;
1476
1477         if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
1478                 di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
1479                 (di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
1480                 di->vbat > VBAT_TRESH_IP_CUR_RED))) {
1481
1482                 dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
1483                         " old: %d\n", di->max_usb_in_curr, di->vbat,
1484                         di->old_vbat);
1485                 ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr);
1486                 power_supply_changed(&di->usb_chg.psy);
1487         }
1488
1489         di->old_vbat = di->vbat;
1490
1491         /*
1492          * No need to check the battery voltage every second when not close to
1493          * the threshold.
1494          */
1495         if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
1496                 (di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
1497                         t = 1;
1498
1499         queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
1500 }
1501
1502 /**
1503  * ab8500_charger_check_hw_failure_work() - check main charger failure
1504  * @work:       pointer to the work_struct structure
1505  *
1506  * Work queue function for checking the main charger status
1507  */
1508 static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
1509 {
1510         int ret;
1511         u8 reg_value;
1512
1513         struct ab8500_charger *di = container_of(work,
1514                 struct ab8500_charger, check_hw_failure_work.work);
1515
1516         /* Check if the status bits for HW failure is still active */
1517         if (di->flags.mainextchnotok) {
1518                 ret = abx500_get_register_interruptible(di->dev,
1519                         AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1520                 if (ret < 0) {
1521                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1522                         return;
1523                 }
1524                 if (!(reg_value & MAIN_CH_NOK)) {
1525                         di->flags.mainextchnotok = false;
1526                         ab8500_power_supply_changed(di, &di->ac_chg.psy);
1527                 }
1528         }
1529         if (di->flags.vbus_ovv) {
1530                 ret = abx500_get_register_interruptible(di->dev,
1531                         AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
1532                         &reg_value);
1533                 if (ret < 0) {
1534                         dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1535                         return;
1536                 }
1537                 if (!(reg_value & VBUS_OVV_TH)) {
1538                         di->flags.vbus_ovv = false;
1539                         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1540                 }
1541         }
1542         /* If we still have a failure, schedule a new check */
1543         if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
1544                 queue_delayed_work(di->charger_wq,
1545                         &di->check_hw_failure_work, round_jiffies(HZ));
1546         }
1547 }
1548
1549 /**
1550  * ab8500_charger_kick_watchdog_work() - kick the watchdog
1551  * @work:       pointer to the work_struct structure
1552  *
1553  * Work queue function for kicking the charger watchdog.
1554  *
1555  * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
1556  * logic. That means we have to continously kick the charger
1557  * watchdog even when no charger is connected. This is only
1558  * valid once the AC charger has been enabled. This is
1559  * a bug that is not handled by the algorithm and the
1560  * watchdog have to be kicked by the charger driver
1561  * when the AC charger is disabled
1562  */
1563 static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
1564 {
1565         int ret;
1566
1567         struct ab8500_charger *di = container_of(work,
1568                 struct ab8500_charger, kick_wd_work.work);
1569
1570         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
1571                 AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
1572         if (ret)
1573                 dev_err(di->dev, "Failed to kick WD!\n");
1574
1575         /* Schedule a new watchdog kick */
1576         queue_delayed_work(di->charger_wq,
1577                 &di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
1578 }
1579
1580 /**
1581  * ab8500_charger_ac_work() - work to get and set main charger status
1582  * @work:       pointer to the work_struct structure
1583  *
1584  * Work queue function for checking the main charger status
1585  */
1586 static void ab8500_charger_ac_work(struct work_struct *work)
1587 {
1588         int ret;
1589
1590         struct ab8500_charger *di = container_of(work,
1591                 struct ab8500_charger, ac_work);
1592
1593         /*
1594          * Since we can't be sure that the events are received
1595          * synchronously, we have the check if the main charger is
1596          * connected by reading the status register
1597          */
1598         ret = ab8500_charger_detect_chargers(di);
1599         if (ret < 0)
1600                 return;
1601
1602         if (ret & AC_PW_CONN) {
1603                 di->ac.charger_connected = 1;
1604                 di->ac_conn = true;
1605         } else {
1606                 di->ac.charger_connected = 0;
1607         }
1608
1609         ab8500_power_supply_changed(di, &di->ac_chg.psy);
1610         sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
1611 }
1612
1613 /**
1614  * ab8500_charger_detect_usb_type_work() - work to detect USB type
1615  * @work:       Pointer to the work_struct structure
1616  *
1617  * Detect the type of USB plugged
1618  */
1619 static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
1620 {
1621         int ret;
1622
1623         struct ab8500_charger *di = container_of(work,
1624                 struct ab8500_charger, detect_usb_type_work);
1625
1626         /*
1627          * Since we can't be sure that the events are received
1628          * synchronously, we have the check if is
1629          * connected by reading the status register
1630          */
1631         ret = ab8500_charger_detect_chargers(di);
1632         if (ret < 0)
1633                 return;
1634
1635         if (!(ret & USB_PW_CONN)) {
1636                 di->vbus_detected = 0;
1637                 ab8500_charger_set_usb_connected(di, false);
1638                 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1639         } else {
1640                 di->vbus_detected = 1;
1641
1642                 if (is_ab8500_1p1_or_earlier(di->parent)) {
1643                         ret = ab8500_charger_detect_usb_type(di);
1644                         if (!ret) {
1645                                 ab8500_charger_set_usb_connected(di, true);
1646                                 ab8500_power_supply_changed(di,
1647                                                             &di->usb_chg.psy);
1648                         }
1649                 } else {
1650                         /* For ABB cut2.0 and onwards we have an IRQ,
1651                          * USB_LINK_STATUS that will be triggered when the USB
1652                          * link status changes. The exception is USB connected
1653                          * during startup. Then we don't get a
1654                          * USB_LINK_STATUS IRQ
1655                          */
1656                         if (di->vbus_detected_start) {
1657                                 di->vbus_detected_start = false;
1658                                 ret = ab8500_charger_detect_usb_type(di);
1659                                 if (!ret) {
1660                                         ab8500_charger_set_usb_connected(di,
1661                                                 true);
1662                                         ab8500_power_supply_changed(di,
1663                                                 &di->usb_chg.psy);
1664                                 }
1665                         }
1666                 }
1667         }
1668 }
1669
1670 /**
1671  * ab8500_charger_usb_link_status_work() - work to detect USB type
1672  * @work:       pointer to the work_struct structure
1673  *
1674  * Detect the type of USB plugged
1675  */
1676 static void ab8500_charger_usb_link_status_work(struct work_struct *work)
1677 {
1678         int ret;
1679
1680         struct ab8500_charger *di = container_of(work,
1681                 struct ab8500_charger, usb_link_status_work);
1682
1683         /*
1684          * Since we can't be sure that the events are received
1685          * synchronously, we have the check if  is
1686          * connected by reading the status register
1687          */
1688         ret = ab8500_charger_detect_chargers(di);
1689         if (ret < 0)
1690                 return;
1691
1692         if (!(ret & USB_PW_CONN)) {
1693                 di->vbus_detected = 0;
1694                 ab8500_charger_set_usb_connected(di, false);
1695                 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1696         } else {
1697                 di->vbus_detected = 1;
1698                 ret = ab8500_charger_read_usb_type(di);
1699                 if (!ret) {
1700                         /* Update maximum input current */
1701                         ret = ab8500_charger_set_vbus_in_curr(di,
1702                                         di->max_usb_in_curr);
1703                         if (ret)
1704                                 return;
1705
1706                         ab8500_charger_set_usb_connected(di, true);
1707                         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1708                 } else if (ret == -ENXIO) {
1709                         /* No valid charger type detected */
1710                         ab8500_charger_set_usb_connected(di, false);
1711                         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1712                 }
1713         }
1714 }
1715
1716 static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
1717 {
1718         int ret;
1719         unsigned long flags;
1720
1721         struct ab8500_charger *di = container_of(work,
1722                 struct ab8500_charger, usb_state_changed_work);
1723
1724         if (!di->vbus_detected)
1725                 return;
1726
1727         spin_lock_irqsave(&di->usb_state.usb_lock, flags);
1728         di->usb_state.usb_changed = false;
1729         spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);
1730
1731         /*
1732          * wait for some time until you get updates from the usb stack
1733          * and negotiations are completed
1734          */
1735         msleep(250);
1736
1737         if (di->usb_state.usb_changed)
1738                 return;
1739
1740         dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
1741                 __func__, di->usb_state.state, di->usb_state.usb_current);
1742
1743         switch (di->usb_state.state) {
1744         case AB8500_BM_USB_STATE_RESET_HS:
1745         case AB8500_BM_USB_STATE_RESET_FS:
1746         case AB8500_BM_USB_STATE_SUSPEND:
1747         case AB8500_BM_USB_STATE_MAX:
1748                 ab8500_charger_set_usb_connected(di, false);
1749                 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1750                 break;
1751
1752         case AB8500_BM_USB_STATE_RESUME:
1753                 /*
1754                  * when suspend->resume there should be delay
1755                  * of 1sec for enabling charging
1756                  */
1757                 msleep(1000);
1758                 /* Intentional fall through */
1759         case AB8500_BM_USB_STATE_CONFIGURED:
1760                 /*
1761                  * USB is configured, enable charging with the charging
1762                  * input current obtained from USB driver
1763                  */
1764                 if (!ab8500_charger_get_usb_cur(di)) {
1765                         /* Update maximum input current */
1766                         ret = ab8500_charger_set_vbus_in_curr(di,
1767                                         di->max_usb_in_curr);
1768                         if (ret)
1769                                 return;
1770
1771                         ab8500_charger_set_usb_connected(di, true);
1772                         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1773                 }
1774                 break;
1775
1776         default:
1777                 break;
1778         };
1779 }
1780
1781 /**
1782  * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
1783  * @work:       pointer to the work_struct structure
1784  *
1785  * Work queue function for checking the USB charger Not OK status
1786  */
1787 static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
1788 {
1789         int ret;
1790         u8 reg_value;
1791         bool prev_status;
1792
1793         struct ab8500_charger *di = container_of(work,
1794                 struct ab8500_charger, check_usbchgnotok_work.work);
1795
1796         /* Check if the status bit for usbchargernotok is still active */
1797         ret = abx500_get_register_interruptible(di->dev,
1798                 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
1799         if (ret < 0) {
1800                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1801                 return;
1802         }
1803         prev_status = di->flags.usbchargernotok;
1804
1805         if (reg_value & VBUS_CH_NOK) {
1806                 di->flags.usbchargernotok = true;
1807                 /* Check again in 1sec */
1808                 queue_delayed_work(di->charger_wq,
1809                         &di->check_usbchgnotok_work, HZ);
1810         } else {
1811                 di->flags.usbchargernotok = false;
1812                 di->flags.vbus_collapse = false;
1813         }
1814
1815         if (prev_status != di->flags.usbchargernotok)
1816                 ab8500_power_supply_changed(di, &di->usb_chg.psy);
1817 }
1818
1819 /**
1820  * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
1821  * @work:       pointer to the work_struct structure
1822  *
1823  * Work queue function for checking the Main thermal prot status
1824  */
1825 static void ab8500_charger_check_main_thermal_prot_work(
1826         struct work_struct *work)
1827 {
1828         int ret;
1829         u8 reg_value;
1830
1831         struct ab8500_charger *di = container_of(work,
1832                 struct ab8500_charger, check_main_thermal_prot_work);
1833
1834         /* Check if the status bit for main_thermal_prot is still active */
1835         ret = abx500_get_register_interruptible(di->dev,
1836                 AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
1837         if (ret < 0) {
1838                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1839                 return;
1840         }
1841         if (reg_value & MAIN_CH_TH_PROT)
1842                 di->flags.main_thermal_prot = true;
1843         else
1844                 di->flags.main_thermal_prot = false;
1845
1846         ab8500_power_supply_changed(di, &di->ac_chg.psy);
1847 }
1848
1849 /**
1850  * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
1851  * @work:       pointer to the work_struct structure
1852  *
1853  * Work queue function for checking the USB thermal prot status
1854  */
1855 static void ab8500_charger_check_usb_thermal_prot_work(
1856         struct work_struct *work)
1857 {
1858         int ret;
1859         u8 reg_value;
1860
1861         struct ab8500_charger *di = container_of(work,
1862                 struct ab8500_charger, check_usb_thermal_prot_work);
1863
1864         /* Check if the status bit for usb_thermal_prot is still active */
1865         ret = abx500_get_register_interruptible(di->dev,
1866                 AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
1867         if (ret < 0) {
1868                 dev_err(di->dev, "%s ab8500 read failed\n", __func__);
1869                 return;
1870         }
1871         if (reg_value & USB_CH_TH_PROT)
1872                 di->flags.usb_thermal_prot = true;
1873         else
1874                 di->flags.usb_thermal_prot = false;
1875
1876         ab8500_power_supply_changed(di, &di->usb_chg.psy);
1877 }
1878
1879 /**
1880  * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
1881  * @irq:       interrupt number
1882  * @_di:       pointer to the ab8500_charger structure
1883  *
1884  * Returns IRQ status(IRQ_HANDLED)
1885  */
1886 static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
1887 {
1888         struct ab8500_charger *di = _di;
1889
1890         dev_dbg(di->dev, "Main charger unplugged\n");
1891         queue_work(di->charger_wq, &di->ac_work);
1892
1893         return IRQ_HANDLED;
1894 }
1895
1896 /**
1897  * ab8500_charger_mainchplugdet_handler() - main charger plugged
1898  * @irq:       interrupt number
1899  * @_di:       pointer to the ab8500_charger structure
1900  *
1901  * Returns IRQ status(IRQ_HANDLED)
1902  */
1903 static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
1904 {
1905         struct ab8500_charger *di = _di;
1906
1907         dev_dbg(di->dev, "Main charger plugged\n");
1908         queue_work(di->charger_wq, &di->ac_work);
1909
1910         return IRQ_HANDLED;
1911 }
1912
1913 /**
1914  * ab8500_charger_mainextchnotok_handler() - main charger not ok
1915  * @irq:       interrupt number
1916  * @_di:       pointer to the ab8500_charger structure
1917  *
1918  * Returns IRQ status(IRQ_HANDLED)
1919  */
1920 static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
1921 {
1922         struct ab8500_charger *di = _di;
1923
1924         dev_dbg(di->dev, "Main charger not ok\n");
1925         di->flags.mainextchnotok = true;
1926         ab8500_power_supply_changed(di, &di->ac_chg.psy);
1927
1928         /* Schedule a new HW failure check */
1929         queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
1930
1931         return IRQ_HANDLED;
1932 }
1933
1934 /**
1935  * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
1936  * thermal protection threshold
1937  * @irq:       interrupt number
1938  * @_di:       pointer to the ab8500_charger structure
1939  *
1940  * Returns IRQ status(IRQ_HANDLED)
1941  */
1942 static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
1943 {
1944         struct ab8500_charger *di = _di;
1945
1946         dev_dbg(di->dev,
1947                 "Die temp above Main charger thermal protection threshold\n");
1948         queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
1949
1950         return IRQ_HANDLED;
1951 }
1952
1953 /**
1954  * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
1955  * thermal protection threshold
1956  * @irq:       interrupt number
1957  * @_di:       pointer to the ab8500_charger structure
1958  *
1959  * Returns IRQ status(IRQ_HANDLED)
1960  */
1961 static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
1962 {
1963         struct ab8500_charger *di = _di;
1964
1965         dev_dbg(di->dev,
1966                 "Die temp ok for Main charger thermal protection threshold\n");
1967         queue_work(di->charger_wq, &di->check_main_thermal_prot_work);
1968
1969         return IRQ_HANDLED;
1970 }
1971
1972 /**
1973  * ab8500_charger_vbusdetf_handler() - VBUS falling detected
1974  * @irq:       interrupt number
1975  * @_di:       pointer to the ab8500_charger structure
1976  *
1977  * Returns IRQ status(IRQ_HANDLED)
1978  */
1979 static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
1980 {
1981         struct ab8500_charger *di = _di;
1982
1983         dev_dbg(di->dev, "VBUS falling detected\n");
1984         queue_work(di->charger_wq, &di->detect_usb_type_work);
1985
1986         return IRQ_HANDLED;
1987 }
1988
1989 /**
1990  * ab8500_charger_vbusdetr_handler() - VBUS rising detected
1991  * @irq:       interrupt number
1992  * @_di:       pointer to the ab8500_charger structure
1993  *
1994  * Returns IRQ status(IRQ_HANDLED)
1995  */
1996 static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
1997 {
1998         struct ab8500_charger *di = _di;
1999
2000         di->vbus_detected = true;
2001         dev_dbg(di->dev, "VBUS rising detected\n");
2002         queue_work(di->charger_wq, &di->detect_usb_type_work);
2003
2004         return IRQ_HANDLED;
2005 }
2006
2007 /**
2008  * ab8500_charger_usblinkstatus_handler() - USB link status has changed
2009  * @irq:       interrupt number
2010  * @_di:       pointer to the ab8500_charger structure
2011  *
2012  * Returns IRQ status(IRQ_HANDLED)
2013  */
2014 static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
2015 {
2016         struct ab8500_charger *di = _di;
2017
2018         dev_dbg(di->dev, "USB link status changed\n");
2019
2020         queue_work(di->charger_wq, &di->usb_link_status_work);
2021
2022         return IRQ_HANDLED;
2023 }
2024
2025 /**
2026  * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
2027  * thermal protection threshold
2028  * @irq:       interrupt number
2029  * @_di:       pointer to the ab8500_charger structure
2030  *
2031  * Returns IRQ status(IRQ_HANDLED)
2032  */
2033 static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
2034 {
2035         struct ab8500_charger *di = _di;
2036
2037         dev_dbg(di->dev,
2038                 "Die temp above USB charger thermal protection threshold\n");
2039         queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2040
2041         return IRQ_HANDLED;
2042 }
2043
2044 /**
2045  * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
2046  * thermal protection threshold
2047  * @irq:       interrupt number
2048  * @_di:       pointer to the ab8500_charger structure
2049  *
2050  * Returns IRQ status(IRQ_HANDLED)
2051  */
2052 static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
2053 {
2054         struct ab8500_charger *di = _di;
2055
2056         dev_dbg(di->dev,
2057                 "Die temp ok for USB charger thermal protection threshold\n");
2058         queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);
2059
2060         return IRQ_HANDLED;
2061 }
2062
2063 /**
2064  * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
2065  * @irq:       interrupt number
2066  * @_di:       pointer to the ab8500_charger structure
2067  *
2068  * Returns IRQ status(IRQ_HANDLED)
2069  */
2070 static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
2071 {
2072         struct ab8500_charger *di = _di;
2073
2074         dev_dbg(di->dev, "Not allowed USB charger detected\n");
2075         queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);
2076
2077         return IRQ_HANDLED;
2078 }
2079
2080 /**
2081  * ab8500_charger_chwdexp_handler() - Charger watchdog expired
2082  * @irq:       interrupt number
2083  * @_di:       pointer to the ab8500_charger structure
2084  *
2085  * Returns IRQ status(IRQ_HANDLED)
2086  */
2087 static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
2088 {
2089         struct ab8500_charger *di = _di;
2090
2091         dev_dbg(di->dev, "Charger watchdog expired\n");
2092
2093         /*
2094          * The charger that was online when the watchdog expired
2095          * needs to be restarted for charging to start again
2096          */
2097         if (di->ac.charger_online) {
2098                 di->ac.wd_expired = true;
2099                 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2100         }
2101         if (di->usb.charger_online) {
2102                 di->usb.wd_expired = true;
2103                 ab8500_power_supply_changed(di, &di->usb_chg.psy);
2104         }
2105
2106         return IRQ_HANDLED;
2107 }
2108
2109 /**
2110  * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
2111  * @irq:       interrupt number
2112  * @_di:       pointer to the ab8500_charger structure
2113  *
2114  * Returns IRQ status(IRQ_HANDLED)
2115  */
2116 static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
2117 {
2118         struct ab8500_charger *di = _di;
2119
2120         dev_dbg(di->dev, "VBUS overvoltage detected\n");
2121         di->flags.vbus_ovv = true;
2122         ab8500_power_supply_changed(di, &di->usb_chg.psy);
2123
2124         /* Schedule a new HW failure check */
2125         queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);
2126
2127         return IRQ_HANDLED;
2128 }
2129
2130 /**
2131  * ab8500_charger_ac_get_property() - get the ac/mains properties
2132  * @psy:       pointer to the power_supply structure
2133  * @psp:       pointer to the power_supply_property structure
2134  * @val:       pointer to the power_supply_propval union
2135  *
2136  * This function gets called when an application tries to get the ac/mains
2137  * properties by reading the sysfs files.
2138  * AC/Mains properties are online, present and voltage.
2139  * online:     ac/mains charging is in progress or not
2140  * present:    presence of the ac/mains
2141  * voltage:    AC/Mains voltage
2142  * Returns error code in case of failure else 0(on success)
2143  */
2144 static int ab8500_charger_ac_get_property(struct power_supply *psy,
2145         enum power_supply_property psp,
2146         union power_supply_propval *val)
2147 {
2148         struct ab8500_charger *di;
2149
2150         di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));
2151
2152         switch (psp) {
2153         case POWER_SUPPLY_PROP_HEALTH:
2154                 if (di->flags.mainextchnotok)
2155                         val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2156                 else if (di->ac.wd_expired || di->usb.wd_expired)
2157                         val->intval = POWER_SUPPLY_HEALTH_DEAD;
2158                 else if (di->flags.main_thermal_prot)
2159                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2160                 else
2161                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
2162                 break;
2163         case POWER_SUPPLY_PROP_ONLINE:
2164                 val->intval = di->ac.charger_online;
2165                 break;
2166         case POWER_SUPPLY_PROP_PRESENT:
2167                 val->intval = di->ac.charger_connected;
2168                 break;
2169         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2170                 di->ac.charger_voltage = ab8500_charger_get_ac_voltage(di);
2171                 val->intval = di->ac.charger_voltage * 1000;
2172                 break;
2173         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2174                 /*
2175                  * This property is used to indicate when CV mode is entered
2176                  * for the AC charger
2177                  */
2178                 di->ac.cv_active = ab8500_charger_ac_cv(di);
2179                 val->intval = di->ac.cv_active;
2180                 break;
2181         case POWER_SUPPLY_PROP_CURRENT_NOW:
2182                 val->intval = ab8500_charger_get_ac_current(di) * 1000;
2183                 break;
2184         default:
2185                 return -EINVAL;
2186         }
2187         return 0;
2188 }
2189
2190 /**
2191  * ab8500_charger_usb_get_property() - get the usb properties
2192  * @psy:        pointer to the power_supply structure
2193  * @psp:        pointer to the power_supply_property structure
2194  * @val:        pointer to the power_supply_propval union
2195  *
2196  * This function gets called when an application tries to get the usb
2197  * properties by reading the sysfs files.
2198  * USB properties are online, present and voltage.
2199  * online:     usb charging is in progress or not
2200  * present:    presence of the usb
2201  * voltage:    vbus voltage
2202  * Returns error code in case of failure else 0(on success)
2203  */
2204 static int ab8500_charger_usb_get_property(struct power_supply *psy,
2205         enum power_supply_property psp,
2206         union power_supply_propval *val)
2207 {
2208         struct ab8500_charger *di;
2209
2210         di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));
2211
2212         switch (psp) {
2213         case POWER_SUPPLY_PROP_HEALTH:
2214                 if (di->flags.usbchargernotok)
2215                         val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
2216                 else if (di->ac.wd_expired || di->usb.wd_expired)
2217                         val->intval = POWER_SUPPLY_HEALTH_DEAD;
2218                 else if (di->flags.usb_thermal_prot)
2219                         val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
2220                 else if (di->flags.vbus_ovv)
2221                         val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
2222                 else
2223                         val->intval = POWER_SUPPLY_HEALTH_GOOD;
2224                 break;
2225         case POWER_SUPPLY_PROP_ONLINE:
2226                 val->intval = di->usb.charger_online;
2227                 break;
2228         case POWER_SUPPLY_PROP_PRESENT:
2229                 val->intval = di->usb.charger_connected;
2230                 break;
2231         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
2232                 di->usb.charger_voltage = ab8500_charger_get_vbus_voltage(di);
2233                 val->intval = di->usb.charger_voltage * 1000;
2234                 break;
2235         case POWER_SUPPLY_PROP_VOLTAGE_AVG:
2236                 /*
2237                  * This property is used to indicate when CV mode is entered
2238                  * for the USB charger
2239                  */
2240                 di->usb.cv_active = ab8500_charger_usb_cv(di);
2241                 val->intval = di->usb.cv_active;
2242                 break;
2243         case POWER_SUPPLY_PROP_CURRENT_NOW:
2244                 val->intval = ab8500_charger_get_usb_current(di) * 1000;
2245                 break;
2246         case POWER_SUPPLY_PROP_CURRENT_AVG:
2247                 /*
2248                  * This property is used to indicate when VBUS has collapsed
2249                  * due to too high output current from the USB charger
2250                  */
2251                 if (di->flags.vbus_collapse)
2252                         val->intval = 1;
2253                 else
2254                         val->intval = 0;
2255                 break;
2256         default:
2257                 return -EINVAL;
2258         }
2259         return 0;
2260 }
2261
2262 /**
2263  * ab8500_charger_init_hw_registers() - Set up charger related registers
2264  * @di:         pointer to the ab8500_charger structure
2265  *
2266  * Set up charger OVV, watchdog and maximum voltage registers as well as
2267  * charging of the backup battery
2268  */
2269 static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
2270 {
2271         int ret = 0;
2272
2273         /* Setup maximum charger current and voltage for ABB cut2.0 */
2274         if (!is_ab8500_1p1_or_earlier(di->parent)) {
2275                 ret = abx500_set_register_interruptible(di->dev,
2276                         AB8500_CHARGER,
2277                         AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
2278                 if (ret) {
2279                         dev_err(di->dev,
2280                                 "failed to set CH_VOLT_LVL_MAX_REG\n");
2281                         goto out;
2282                 }
2283
2284                 ret = abx500_set_register_interruptible(di->dev,
2285                         AB8500_CHARGER,
2286                         AB8500_CH_OPT_CRNTLVL_MAX_REG, CH_OP_CUR_LVL_1P6);
2287                 if (ret) {
2288                         dev_err(di->dev,
2289                                 "failed to set CH_OPT_CRNTLVL_MAX_REG\n");
2290                         goto out;
2291                 }
2292         }
2293
2294         /* VBUS OVV set to 6.3V and enable automatic current limitiation */
2295         ret = abx500_set_register_interruptible(di->dev,
2296                 AB8500_CHARGER,
2297                 AB8500_USBCH_CTRL2_REG,
2298                 VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
2299         if (ret) {
2300                 dev_err(di->dev, "failed to set VBUS OVV\n");
2301                 goto out;
2302         }
2303
2304         /* Enable main watchdog in OTP */
2305         ret = abx500_set_register_interruptible(di->dev,
2306                 AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
2307         if (ret) {
2308                 dev_err(di->dev, "failed to enable main WD in OTP\n");
2309                 goto out;
2310         }
2311
2312         /* Enable main watchdog */
2313         ret = abx500_set_register_interruptible(di->dev,
2314                 AB8500_SYS_CTRL2_BLOCK,
2315                 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
2316         if (ret) {
2317                 dev_err(di->dev, "faile to enable main watchdog\n");
2318                 goto out;
2319         }
2320
2321         /*
2322          * Due to internal synchronisation, Enable and Kick watchdog bits
2323          * cannot be enabled in a single write.
2324          * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
2325          * between writing Enable then Kick bits.
2326          */
2327         udelay(63);
2328
2329         /* Kick main watchdog */
2330         ret = abx500_set_register_interruptible(di->dev,
2331                 AB8500_SYS_CTRL2_BLOCK,
2332                 AB8500_MAIN_WDOG_CTRL_REG,
2333                 (MAIN_WDOG_ENA | MAIN_WDOG_KICK));
2334         if (ret) {
2335                 dev_err(di->dev, "failed to kick main watchdog\n");
2336                 goto out;
2337         }
2338
2339         /* Disable main watchdog */
2340         ret = abx500_set_register_interruptible(di->dev,
2341                 AB8500_SYS_CTRL2_BLOCK,
2342                 AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
2343         if (ret) {
2344                 dev_err(di->dev, "failed to disable main watchdog\n");
2345                 goto out;
2346         }
2347
2348         /* Set watchdog timeout */
2349         ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2350                 AB8500_CH_WD_TIMER_REG, WD_TIMER);
2351         if (ret) {
2352                 dev_err(di->dev, "failed to set charger watchdog timeout\n");
2353                 goto out;
2354         }
2355
2356         /* Backup battery voltage and current */
2357         ret = abx500_set_register_interruptible(di->dev,
2358                 AB8500_RTC,
2359                 AB8500_RTC_BACKUP_CHG_REG,
2360                 di->bat->bkup_bat_v |
2361                 di->bat->bkup_bat_i);
2362         if (ret) {
2363                 dev_err(di->dev, "failed to setup backup battery charging\n");
2364                 goto out;
2365         }
2366
2367         /* Enable backup battery charging */
2368         abx500_mask_and_set_register_interruptible(di->dev,
2369                 AB8500_RTC, AB8500_RTC_CTRL_REG,
2370                 RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
2371         if (ret < 0)
2372                 dev_err(di->dev, "%s mask and set failed\n", __func__);
2373
2374 out:
2375         return ret;
2376 }
2377
2378 /*
2379  * ab8500 charger driver interrupts and their respective isr
2380  */
2381 static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
2382         {"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
2383         {"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
2384         {"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
2385         {"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
2386         {"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
2387         {"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
2388         {"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
2389         {"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
2390         {"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
2391         {"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
2392         {"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
2393         {"VBUS_OVV", ab8500_charger_vbusovv_handler},
2394         {"CH_WD_EXP", ab8500_charger_chwdexp_handler},
2395 };
2396
2397 static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
2398                 unsigned long event, void *power)
2399 {
2400         struct ab8500_charger *di =
2401                 container_of(nb, struct ab8500_charger, nb);
2402         enum ab8500_usb_state bm_usb_state;
2403         unsigned mA = *((unsigned *)power);
2404
2405         if (event != USB_EVENT_VBUS) {
2406                 dev_dbg(di->dev, "not a standard host, returning\n");
2407                 return NOTIFY_DONE;
2408         }
2409
2410         /* TODO: State is fabricate  here. See if charger really needs USB
2411          * state or if mA is enough
2412          */
2413         if ((di->usb_state.usb_current == 2) && (mA > 2))
2414                 bm_usb_state = AB8500_BM_USB_STATE_RESUME;
2415         else if (mA == 0)
2416                 bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
2417         else if (mA == 2)
2418                 bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
2419         else if (mA >= 8) /* 8, 100, 500 */
2420                 bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
2421         else /* Should never occur */
2422                 bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;
2423
2424         dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
2425                 __func__, bm_usb_state, mA);
2426
2427         spin_lock(&di->usb_state.usb_lock);
2428         di->usb_state.usb_changed = true;
2429         spin_unlock(&di->usb_state.usb_lock);
2430
2431         di->usb_state.state = bm_usb_state;
2432         di->usb_state.usb_current = mA;
2433
2434         queue_work(di->charger_wq, &di->usb_state_changed_work);
2435
2436         return NOTIFY_OK;
2437 }
2438
2439 #if defined(CONFIG_PM)
2440 static int ab8500_charger_resume(struct platform_device *pdev)
2441 {
2442         int ret;
2443         struct ab8500_charger *di = platform_get_drvdata(pdev);
2444
2445         /*
2446          * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2447          * logic. That means we have to continously kick the charger
2448          * watchdog even when no charger is connected. This is only
2449          * valid once the AC charger has been enabled. This is
2450          * a bug that is not handled by the algorithm and the
2451          * watchdog have to be kicked by the charger driver
2452          * when the AC charger is disabled
2453          */
2454         if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
2455                 ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
2456                         AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
2457                 if (ret)
2458                         dev_err(di->dev, "Failed to kick WD!\n");
2459
2460                 /* If not already pending start a new timer */
2461                 if (!delayed_work_pending(
2462                         &di->kick_wd_work)) {
2463                         queue_delayed_work(di->charger_wq, &di->kick_wd_work,
2464                                 round_jiffies(WD_KICK_INTERVAL));
2465                 }
2466         }
2467
2468         /* If we still have a HW failure, schedule a new check */
2469         if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
2470                 queue_delayed_work(di->charger_wq,
2471                         &di->check_hw_failure_work, 0);
2472         }
2473
2474         return 0;
2475 }
2476
2477 static int ab8500_charger_suspend(struct platform_device *pdev,
2478         pm_message_t state)
2479 {
2480         struct ab8500_charger *di = platform_get_drvdata(pdev);
2481
2482         /* Cancel any pending HW failure check */
2483         if (delayed_work_pending(&di->check_hw_failure_work))
2484                 cancel_delayed_work(&di->check_hw_failure_work);
2485
2486         return 0;
2487 }
2488 #else
2489 #define ab8500_charger_suspend      NULL
2490 #define ab8500_charger_resume       NULL
2491 #endif
2492
2493 static int __devexit ab8500_charger_remove(struct platform_device *pdev)
2494 {
2495         struct ab8500_charger *di = platform_get_drvdata(pdev);
2496         int i, irq, ret;
2497
2498         /* Disable AC charging */
2499         ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);
2500
2501         /* Disable USB charging */
2502         ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);
2503
2504         /* Disable interrupts */
2505         for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2506                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2507                 free_irq(irq, di);
2508         }
2509
2510         /* disable the regulator */
2511         regulator_put(di->regu);
2512
2513         /* Backup battery voltage and current disable */
2514         ret = abx500_mask_and_set_register_interruptible(di->dev,
2515                 AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
2516         if (ret < 0)
2517                 dev_err(di->dev, "%s mask and set failed\n", __func__);
2518
2519         usb_unregister_notifier(di->usb_phy, &di->nb);
2520         usb_put_phy(di->usb_phy);
2521
2522         /* Delete the work queue */
2523         destroy_workqueue(di->charger_wq);
2524
2525         flush_scheduled_work();
2526         power_supply_unregister(&di->usb_chg.psy);
2527         power_supply_unregister(&di->ac_chg.psy);
2528         platform_set_drvdata(pdev, NULL);
2529         kfree(di);
2530
2531         return 0;
2532 }
2533
2534 static int __devinit ab8500_charger_probe(struct platform_device *pdev)
2535 {
2536         int irq, i, charger_status, ret = 0;
2537         struct abx500_bm_plat_data *plat_data = pdev->dev.platform_data;
2538         struct ab8500_charger *di;
2539
2540         if (!plat_data) {
2541                 dev_err(&pdev->dev, "No platform data\n");
2542                 return -EINVAL;
2543         }
2544
2545         di = kzalloc(sizeof(*di), GFP_KERNEL);
2546         if (!di)
2547                 return -ENOMEM;
2548
2549         /* get parent data */
2550         di->dev = &pdev->dev;
2551         di->parent = dev_get_drvdata(pdev->dev.parent);
2552         di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");
2553
2554         /* initialize lock */
2555         spin_lock_init(&di->usb_state.usb_lock);
2556
2557         /* get charger specific platform data */
2558         di->pdata = plat_data->charger;
2559         if (!di->pdata) {
2560                 dev_err(di->dev, "no charger platform data supplied\n");
2561                 ret = -EINVAL;
2562                 goto free_device_info;
2563         }
2564
2565         /* get battery specific platform data */
2566         di->bat = plat_data->battery;
2567         if (!di->bat) {
2568                 dev_err(di->dev, "no battery platform data supplied\n");
2569                 ret = -EINVAL;
2570                 goto free_device_info;
2571         }
2572
2573         di->autopower = false;
2574
2575         /* AC supply */
2576         /* power_supply base class */
2577         di->ac_chg.psy.name = "ab8500_ac";
2578         di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
2579         di->ac_chg.psy.properties = ab8500_charger_ac_props;
2580         di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
2581         di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
2582         di->ac_chg.psy.supplied_to = di->pdata->supplied_to;
2583         di->ac_chg.psy.num_supplicants = di->pdata->num_supplicants;
2584         /* ux500_charger sub-class */
2585         di->ac_chg.ops.enable = &ab8500_charger_ac_en;
2586         di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2587         di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2588         di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
2589                 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2590         di->ac_chg.max_out_curr = ab8500_charger_current_map[
2591                 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2592
2593         /* USB supply */
2594         /* power_supply base class */
2595         di->usb_chg.psy.name = "ab8500_usb";
2596         di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
2597         di->usb_chg.psy.properties = ab8500_charger_usb_props;
2598         di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
2599         di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
2600         di->usb_chg.psy.supplied_to = di->pdata->supplied_to;
2601         di->usb_chg.psy.num_supplicants = di->pdata->num_supplicants;
2602         /* ux500_charger sub-class */
2603         di->usb_chg.ops.enable = &ab8500_charger_usb_en;
2604         di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
2605         di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
2606         di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
2607                 ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
2608         di->usb_chg.max_out_curr = ab8500_charger_current_map[
2609                 ARRAY_SIZE(ab8500_charger_current_map) - 1];
2610
2611
2612         /* Create a work queue for the charger */
2613         di->charger_wq =
2614                 create_singlethread_workqueue("ab8500_charger_wq");
2615         if (di->charger_wq == NULL) {
2616                 dev_err(di->dev, "failed to create work queue\n");
2617                 goto free_device_info;
2618         }
2619
2620         /* Init work for HW failure check */
2621         INIT_DELAYED_WORK_DEFERRABLE(&di->check_hw_failure_work,
2622                 ab8500_charger_check_hw_failure_work);
2623         INIT_DELAYED_WORK_DEFERRABLE(&di->check_usbchgnotok_work,
2624                 ab8500_charger_check_usbchargernotok_work);
2625
2626         /*
2627          * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
2628          * logic. That means we have to continously kick the charger
2629          * watchdog even when no charger is connected. This is only
2630          * valid once the AC charger has been enabled. This is
2631          * a bug that is not handled by the algorithm and the
2632          * watchdog have to be kicked by the charger driver
2633          * when the AC charger is disabled
2634          */
2635         INIT_DELAYED_WORK_DEFERRABLE(&di->kick_wd_work,
2636                 ab8500_charger_kick_watchdog_work);
2637
2638         INIT_DELAYED_WORK_DEFERRABLE(&di->check_vbat_work,
2639                 ab8500_charger_check_vbat_work);
2640
2641         /* Init work for charger detection */
2642         INIT_WORK(&di->usb_link_status_work,
2643                 ab8500_charger_usb_link_status_work);
2644         INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
2645         INIT_WORK(&di->detect_usb_type_work,
2646                 ab8500_charger_detect_usb_type_work);
2647
2648         INIT_WORK(&di->usb_state_changed_work,
2649                 ab8500_charger_usb_state_changed_work);
2650
2651         /* Init work for checking HW status */
2652         INIT_WORK(&di->check_main_thermal_prot_work,
2653                 ab8500_charger_check_main_thermal_prot_work);
2654         INIT_WORK(&di->check_usb_thermal_prot_work,
2655                 ab8500_charger_check_usb_thermal_prot_work);
2656
2657         /*
2658          * VDD ADC supply needs to be enabled from this driver when there
2659          * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
2660          * interrupts during charging
2661          */
2662         di->regu = regulator_get(di->dev, "vddadc");
2663         if (IS_ERR(di->regu)) {
2664                 ret = PTR_ERR(di->regu);
2665                 dev_err(di->dev, "failed to get vddadc regulator\n");
2666                 goto free_charger_wq;
2667         }
2668
2669
2670         /* Initialize OVV, and other registers */
2671         ret = ab8500_charger_init_hw_registers(di);
2672         if (ret) {
2673                 dev_err(di->dev, "failed to initialize ABB registers\n");
2674                 goto free_regulator;
2675         }
2676
2677         /* Register AC charger class */
2678         ret = power_supply_register(di->dev, &di->ac_chg.psy);
2679         if (ret) {
2680                 dev_err(di->dev, "failed to register AC charger\n");
2681                 goto free_regulator;
2682         }
2683
2684         /* Register USB charger class */
2685         ret = power_supply_register(di->dev, &di->usb_chg.psy);
2686         if (ret) {
2687                 dev_err(di->dev, "failed to register USB charger\n");
2688                 goto free_ac;
2689         }
2690
2691         di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
2692         if (IS_ERR_OR_NULL(di->usb_phy)) {
2693                 dev_err(di->dev, "failed to get usb transceiver\n");
2694                 ret = -EINVAL;
2695                 goto free_usb;
2696         }
2697         di->nb.notifier_call = ab8500_charger_usb_notifier_call;
2698         ret = usb_register_notifier(di->usb_phy, &di->nb);
2699         if (ret) {
2700                 dev_err(di->dev, "failed to register usb notifier\n");
2701                 goto put_usb_phy;
2702         }
2703
2704         /* Identify the connected charger types during startup */
2705         charger_status = ab8500_charger_detect_chargers(di);
2706         if (charger_status & AC_PW_CONN) {
2707                 di->ac.charger_connected = 1;
2708                 di->ac_conn = true;
2709                 ab8500_power_supply_changed(di, &di->ac_chg.psy);
2710                 sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
2711         }
2712
2713         if (charger_status & USB_PW_CONN) {
2714                 dev_dbg(di->dev, "VBUS Detect during startup\n");
2715                 di->vbus_detected = true;
2716                 di->vbus_detected_start = true;
2717                 queue_work(di->charger_wq,
2718                         &di->detect_usb_type_work);
2719         }
2720
2721         /* Register interrupts */
2722         for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
2723                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2724                 ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
2725                         IRQF_SHARED | IRQF_NO_SUSPEND,
2726                         ab8500_charger_irq[i].name, di);
2727
2728                 if (ret != 0) {
2729                         dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
2730                                 , ab8500_charger_irq[i].name, irq, ret);
2731                         goto free_irq;
2732                 }
2733                 dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
2734                         ab8500_charger_irq[i].name, irq, ret);
2735         }
2736
2737         platform_set_drvdata(pdev, di);
2738
2739         return ret;
2740
2741 free_irq:
2742         usb_unregister_notifier(di->usb_phy, &di->nb);
2743
2744         /* We also have to free all successfully registered irqs */
2745         for (i = i - 1; i >= 0; i--) {
2746                 irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
2747                 free_irq(irq, di);
2748         }
2749 put_usb_phy:
2750         usb_put_phy(di->usb_phy);
2751 free_usb:
2752         power_supply_unregister(&di->usb_chg.psy);
2753 free_ac:
2754         power_supply_unregister(&di->ac_chg.psy);
2755 free_regulator:
2756         regulator_put(di->regu);
2757 free_charger_wq:
2758         destroy_workqueue(di->charger_wq);
2759 free_device_info:
2760         kfree(di);
2761
2762         return ret;
2763 }
2764
2765 static struct platform_driver ab8500_charger_driver = {
2766         .probe = ab8500_charger_probe,
2767         .remove = __devexit_p(ab8500_charger_remove),
2768         .suspend = ab8500_charger_suspend,
2769         .resume = ab8500_charger_resume,
2770         .driver = {
2771                 .name = "ab8500-charger",
2772                 .owner = THIS_MODULE,
2773         },
2774 };
2775
2776 static int __init ab8500_charger_init(void)
2777 {
2778         return platform_driver_register(&ab8500_charger_driver);
2779 }
2780
2781 static void __exit ab8500_charger_exit(void)
2782 {
2783         platform_driver_unregister(&ab8500_charger_driver);
2784 }
2785
2786 subsys_initcall_sync(ab8500_charger_init);
2787 module_exit(ab8500_charger_exit);
2788
2789 MODULE_LICENSE("GPL v2");
2790 MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
2791 MODULE_ALIAS("platform:ab8500-charger");
2792 MODULE_DESCRIPTION("AB8500 charger management driver");