/* * Copyright (C) ST-Ericsson SA 2011 * * Charger driver for AB5500 * * License Terms: GNU General Public License v2 * Authors: * Johan Palsson * Karl Komierowski */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Charger constants */ #define NO_PW_CONN 0 #define USB_PW_CONN 2 /* HW failure constants */ #define VBUS_CH_NOK 0x0A #define VBUS_OVV_TH 0x06 /* AB5500 Charger constants */ #define AB5500_USB_LINK_STATUS 0x78 #define CHARGER_REV_SUP 0x10 #define SW_EOC 0x40 #define USB_CHAR_DET 0x02 #define VBUS_RISING 0x20 #define VBUS_FALLING 0x40 #define USB_LINK_UPDATE 0x02 #define USB_CH_TH_PROT_LOW 0x02 #define USB_CH_TH_PROT_HIGH 0x01 #define USB_ID_HOST_DET_ENA_MASK 0x02 #define USB_ID_HOST_DET_ENA 0x02 #define USB_ID_DEVICE_DET_ENA_MASK 0x01 #define USB_ID_DEVICE_DET_ENA 0x01 #define CHARGER_ISET_IN_1_1A 0x0C #define LED_ENABLE 0x01 #define RESET 0x00 #define SSW_ENABLE_REBOOT 0x80 #define SSW_REBOOT_EN 0x40 #define SSW_CONTROL_AUTOC 0x04 #define SSW_PSEL_480S 0x00 /* UsbLineStatus register - usb types */ enum ab5500_charger_link_status { USB_STAT_NOT_CONFIGURED, USB_STAT_STD_HOST_NC, USB_STAT_STD_HOST_C_NS, USB_STAT_STD_HOST_C_S, USB_STAT_HOST_CHG_NM, USB_STAT_HOST_CHG_HS, USB_STAT_HOST_CHG_HS_CHIRP, USB_STAT_DEDICATED_CHG, USB_STAT_ACA_RID_A, USB_STAT_ACA_RID_B, USB_STAT_ACA_RID_C_NM, USB_STAT_ACA_RID_C_HS, USB_STAT_ACA_RID_C_HS_CHIRP, USB_STAT_HM_IDGND, USB_STAT_RESERVED, USB_STAT_NOT_VALID_LINK, }; enum ab5500_usb_state { AB5500_BM_USB_STATE_RESET_HS, /* HighSpeed Reset */ AB5500_BM_USB_STATE_RESET_FS, /* FullSpeed/LowSpeed Reset */ AB5500_BM_USB_STATE_CONFIGURED, AB5500_BM_USB_STATE_SUSPEND, AB5500_BM_USB_STATE_RESUME, AB5500_BM_USB_STATE_MAX, }; /* VBUS input current limits supported in AB5500 in mA */ #define USB_CH_IP_CUR_LVL_0P05 50 #define USB_CH_IP_CUR_LVL_0P09 98 #define USB_CH_IP_CUR_LVL_0P19 193 #define USB_CH_IP_CUR_LVL_0P29 290 #define USB_CH_IP_CUR_LVL_0P38 380 #define USB_CH_IP_CUR_LVL_0P45 450 #define USB_CH_IP_CUR_LVL_0P5 500 #define USB_CH_IP_CUR_LVL_0P6 600 #define USB_CH_IP_CUR_LVL_0P7 700 #define USB_CH_IP_CUR_LVL_0P8 800 #define USB_CH_IP_CUR_LVL_0P9 900 #define USB_CH_IP_CUR_LVL_1P0 1000 #define USB_CH_IP_CUR_LVL_1P1 1100 #define USB_CH_IP_CUR_LVL_1P3 1300 #define USB_CH_IP_CUR_LVL_1P4 1400 #define USB_CH_IP_CUR_LVL_1P5 1500 #define to_ab5500_charger_usb_device_info(x) container_of((x), \ struct ab5500_charger, usb_chg) /** * struct ab5500_charger_interrupts - ab5500 interupts * @name: name of the interrupt * @isr function pointer to the isr */ struct ab5500_charger_interrupts { char *name; irqreturn_t (*isr)(int irq, void *data); }; struct ab5500_charger_info { int charger_connected; int charger_online; int charger_voltage; int cv_active; bool wd_expired; }; struct ab5500_charger_event_flags { bool usb_thermal_prot; bool vbus_ovv; bool usbchargernotok; bool vbus_collapse; }; struct ab5500_charger_usb_state { bool usb_changed; int usb_current; enum ab5500_usb_state state; spinlock_t usb_lock; }; /** * struct ab5500_charger - ab5500 Charger device information * @dev: Pointer to the structure device * @chip_id: Chip-Id of the ab5500 * @max_usb_in_curr: Max USB charger input current * @vbus_detected: VBUS detected * @vbus_detected_start: * VBUS detected during startup * @parent: Pointer to the struct ab5500 * @gpadc: Pointer to the struct gpadc * @pdata: Pointer to the ab5500_charger platform data * @bat: Pointer to the ab5500_bm platform data * @flags: Structure for information about events triggered * @usb_state: Structure for usb stack information * @usb_chg: USB charger power supply * @ac: Structure that holds the AC charger properties * @usb: Structure that holds the USB charger properties * @charger_wq: Work queue for the IRQs and checking HW state * @check_hw_failure_work: Work for checking HW state * @check_usbchgnotok_work: Work for checking USB charger not ok status * @ac_work: Work for checking AC charger connection * @detect_usb_type_work: Work for detecting the USB type connected * @usb_link_status_work: Work for checking the new USB link status * @usb_state_changed_work: Work for checking USB state * @check_main_thermal_prot_work: * Work for checking Main thermal status * @check_usb_thermal_prot_work: * Work for checking USB thermal status */ struct ab5500_charger { struct device *dev; u8 chip_id; int max_usb_in_curr; bool vbus_detected; bool vbus_detected_start; struct ab5500 *parent; struct ab5500_gpadc *gpadc; struct abx500_charger_platform_data *pdata; struct abx500_bm_data *bat; struct ab5500_charger_event_flags flags; struct ab5500_charger_usb_state usb_state; struct ux500_charger usb_chg; struct ab5500_charger_info usb; struct workqueue_struct *charger_wq; struct delayed_work check_hw_failure_work; struct delayed_work check_usbchgnotok_work; struct work_struct detect_usb_type_work; struct work_struct usb_link_status_work; struct work_struct usb_state_changed_work; struct work_struct check_usb_thermal_prot_work; }; /* * TODO: This variable is static in order to get information * about maximum current and USB state from the USB driver * This should be solved in a better way */ static struct ab5500_charger *static_di; /* USB properties */ static enum power_supply_property ab5500_charger_usb_props[] = { POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CURRENT_AVG, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, }; /** * ab5500_charger_get_vbus_voltage() - get vbus voltage * @di: pointer to the ab5500_charger structure * * This function returns the vbus voltage. * Returns vbus voltage (on success) */ static int ab5500_charger_get_vbus_voltage(struct ab5500_charger *di) { int vch; /* Only measure voltage if the charger is connected */ if (di->usb.charger_connected) { vch = ab5500_gpadc_convert(di->gpadc, VBUS_V); if (vch < 0) dev_err(di->dev, "%s gpadc conv failed\n", __func__); } else { vch = 0; } return vch; } /** * ab5500_charger_get_usb_current() - get usb charger current * @di: pointer to the ab5500_charger structure * * This function returns the usb charger current. * Returns usb current (on success) and error code on failure */ static int ab5500_charger_get_usb_current(struct ab5500_charger *di) { int ich; /* Only measure current if the charger is online */ if (di->usb.charger_online) { ich = ab5500_gpadc_convert(di->gpadc, USB_CHARGER_C); if (ich < 0) dev_err(di->dev, "%s gpadc conv failed\n", __func__); } else { ich = 0; } return ich; } /** * ab5500_charger_detect_chargers() - Detect the connected chargers * @di: pointer to the ab5500_charger structure * * Returns the type of charger connected. * For USB it will not mean we can actually charge from it * but that there is a USB cable connected that we have to * identify. This is used during startup when we don't get * interrupts of the charger detection * * Returns an integer value, that means, * NO_PW_CONN no power supply is connected * USB_PW_CONN if the USB power supply is connected */ static int ab5500_charger_detect_chargers(struct ab5500_charger *di) { int result = NO_PW_CONN; int ret; u8 val; /* Check for USB charger */ /* * TODO: Since there are no status register validating by * reading the IT souce registers */ ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_IT, AB5500_IT_SOURCE8, &val); if (ret < 0) { dev_err(di->dev, "%s ab5500 read failed\n", __func__); return ret; } if (val & VBUS_RISING) result |= USB_PW_CONN; else if (val & VBUS_FALLING) result = NO_PW_CONN; return result; } /** * ab5500_charger_max_usb_curr() - get the max curr for the USB type * @di: pointer to the ab5500_charger structure * @link_status: the identified USB type * * Get the maximum current that is allowed to be drawn from the host * based on the USB type. * Returns error code in case of failure else 0 on success */ static int ab5500_charger_max_usb_curr(struct ab5500_charger *di, enum ab5500_charger_link_status link_status) { int ret = 0; switch (link_status) { case USB_STAT_STD_HOST_NC: case USB_STAT_STD_HOST_C_NS: case USB_STAT_STD_HOST_C_S: dev_dbg(di->dev, "USB Type - Standard host is " "detected through USB driver\n"); ret = -1; break; case USB_STAT_HOST_CHG_HS_CHIRP: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; break; case USB_STAT_HOST_CHG_HS: case USB_STAT_ACA_RID_C_HS: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P9; break; case USB_STAT_ACA_RID_A: /* * Dedicated charger level minus maximum current accessory * can consume (300mA). Closest level is 1100mA */ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P1; break; case USB_STAT_ACA_RID_B: /* * Dedicated charger level minus 120mA (20mA for ACA and * 100mA for potential accessory). Closest level is 1300mA */ di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P3; break; case USB_STAT_DEDICATED_CHG: case USB_STAT_HOST_CHG_NM: case USB_STAT_ACA_RID_C_HS_CHIRP: case USB_STAT_ACA_RID_C_NM: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; break; case USB_STAT_RESERVED: /* * This state is used to indicate that VBUS has dropped below * the detection level 4 times in a row. This is due to the * charger output current is set to high making the charger * voltage collapse. This have to be propagated through to * chargalg. This is done using the property * POWER_SUPPLY_PROP_CURRENT_AVG = 1 */ di->flags.vbus_collapse = true; dev_dbg(di->dev, "USB Type - USB_STAT_RESERVED " "VBUS has collapsed\n"); ret = -1; break; case USB_STAT_HM_IDGND: case USB_STAT_NOT_CONFIGURED: case USB_STAT_NOT_VALID_LINK: dev_err(di->dev, "USB Type - Charging not allowed\n"); di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; ret = -ENXIO; break; default: dev_err(di->dev, "USB Type - Unknown\n"); di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; ret = -ENXIO; break; }; dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, di->max_usb_in_curr); return ret; } /** * ab5500_charger_read_usb_type() - read the type of usb connected * @di: pointer to the ab5500_charger structure * * Detect the type of the plugged USB * Returns error code in case of failure else 0 on success */ static int ab5500_charger_read_usb_type(struct ab5500_charger *di) { int ret; u8 val; ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_USB_LINE_STATUS, &val); if (ret < 0) { dev_err(di->dev, "%s ab5500 read failed\n", __func__); return ret; } /* get the USB type */ val = (val & AB5500_USB_LINK_STATUS) >> 3; ret = ab5500_charger_max_usb_curr(di, (enum ab5500_charger_link_status) val); return ret; } static int ab5500_charger_voltage_map[] = { 3500 , 3525 , 3550 , 3575 , 3600 , 3625 , 3650 , 3675 , 3700 , 3725 , 3750 , 3775 , 3800 , 3825 , 3850 , 3875 , 3900 , 3925 , 3950 , 3975 , 4000 , 4025 , 4050 , 4060 , 4070 , 4080 , 4090 , 4100 , 4110 , 4120 , 4130 , 4140 , 4150 , 4160 , 4170 , 4180 , 4190 , 4200 , 4210 , 4220 , 4230 , 4240 , 4250 , 4260 , 4270 , 4280 , 4290 , 4300 , 4310 , 4320 , 4330 , 4340 , 4350 , 4360 , 4370 , 4380 , 4390 , 4400 , 4410 , 4420 , 4430 , 4440 , 4450 , 4460 , 4470 , 4480 , 4490 , 4500 , 4510 , 4520 , 4530 , 4540 , 4550 , 4560 , 4570 , 4580 , 4590 , 4600 , }; /* * This array maps the raw hex value to charger current used by the ab5500 * Values taken from the AB5500 product specification manual */ static int ab5500_charger_current_map[] = { 100 , 200 , 300 , 400 , 500 , 600 , 700 , 800 , 900 , 1000, 1100, 1200, 1300, 1400, 1500, 1500, }; static int ab5500_icsr_current_map[] = { 50, 93, 193, 290, 380, 450, 500 , 600 , 700 , 800 , 900 , 1000, 1100, 1300, 1400, 1500, }; static int ab5500_cvrec_voltage_map[] = { 3300, 3325, 3350, 3375, 3400, 3425, 3450, 3475, 3500, 3525, 3550, 3575, 3600, 3625, 3650, 3675, 3700, 3725, 3750, 3775, 3800, 3825, 3850, 3875, 3900, 3925, 4000, 4025, 4050, 4075, 4100, 4125, 4150, 4175, 4200, 4225, 4250, 4275, 4300, 4325, 4350, 4375, 4400, 4425, 4450, 4475, 4500, 4525, 4550, 4575, 4600, }; static int ab5500_cvrec_voltage_to_regval(int voltage) { int i; /* Special case for voltage below 3.3V */ if (voltage < ab5500_cvrec_voltage_map[0]) return 0; for (i = 1; i < ARRAY_SIZE(ab5500_cvrec_voltage_map); i++) { if (voltage < ab5500_cvrec_voltage_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab5500_cvrec_voltage_map) - 1; if (voltage == ab5500_cvrec_voltage_map[i]) return i; else return -1; } static int ab5500_voltage_to_regval(int voltage) { int i; /* Special case for voltage below 3.3V */ if (voltage < ab5500_charger_voltage_map[0]) return 0; for (i = 1; i < ARRAY_SIZE(ab5500_charger_voltage_map); i++) { if (voltage < ab5500_charger_voltage_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab5500_charger_voltage_map) - 1; if (voltage == ab5500_charger_voltage_map[i]) return i; else return -1; } static int ab5500_icsr_curr_to_regval(int curr) { int i; if (curr < ab5500_icsr_current_map[0]) return 0; for (i = 0; i < ARRAY_SIZE(ab5500_icsr_current_map); i++) { if (curr < ab5500_icsr_current_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab5500_icsr_current_map) - 1; if (curr == ab5500_icsr_current_map[i]) return i; else return -1; } static int ab5500_current_to_regval(int curr) { int i; if (curr < ab5500_charger_current_map[0]) return 0; for (i = 0; i < ARRAY_SIZE(ab5500_charger_current_map); i++) { if (curr < ab5500_charger_current_map[i]) return i - 1; } /* If not last element, return error */ i = ARRAY_SIZE(ab5500_charger_current_map) - 1; if (curr == ab5500_charger_current_map[i]) return i; else return -1; } /** * ab5500_charger_get_usb_cur() - get usb current * @di: pointer to the ab5500_charger structre * * The usb stack provides the maximum current that can be drawn from * the standard usb host. This will be in mA. * This function converts current in mA to a value that can be written * to the register. Returns -1 if charging is not allowed */ static int ab5500_charger_get_usb_cur(struct ab5500_charger *di) { switch (di->usb_state.usb_current) { case 50: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; break; case 100: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P09; break; case 200: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P19; break; case 300: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P29; break; case 400: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P38; break; case 500: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P5; break; default: di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; return -1; break; }; return 0; } /** * ab5500_charger_set_vbus_in_curr() - set VBUS input current limit * @di: pointer to the ab5500_charger structure * @ich_in: charger input current limit * * Sets the current that can be drawn from the USB host * Returns error code in case of failure else 0(on success) */ static int ab5500_charger_set_vbus_in_curr(struct ab5500_charger *di, int ich_in) { int ret; int input_curr_index; int min_value; /* We should always use to lowest current limit */ min_value = min(di->bat->chg_params->usb_curr_max, ich_in); input_curr_index = ab5500_icsr_curr_to_regval(min_value); if (input_curr_index < 0) { dev_err(di->dev, "VBUS input current limit too high\n"); return -ENXIO; } ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_ICSR, input_curr_index); if (ret) dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /** * ab5500_charger_usb_en() - enable usb charging * @di: pointer to the ab5500_charger structure * @enable: enable/disable flag * @vset: charging voltage * @ich_out: charger output current * * Enable/Disable USB charging and turns on/off the charging led respectively. * Returns error code in case of failure else 0(on success) */ static int ab5500_charger_usb_en(struct ux500_charger *charger, int enable, int vset, int ich_out) { int ret; int volt_index; int curr_index; struct ab5500_charger *di = to_ab5500_charger_usb_device_info(charger); if (enable) { /* Check if USB is connected */ if (!di->usb.charger_connected) { dev_err(di->dev, "USB charger not connected\n"); return -ENXIO; } /* Enable USB charging */ dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out); volt_index = ab5500_voltage_to_regval(vset); curr_index = ab5500_current_to_regval(ich_out) ; /* ChVoltLevel: max voltage upto which battery can be charged */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_VSRC, (u8) volt_index); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* current that can be drawn from the usb */ ret = ab5500_charger_set_vbus_in_curr(di, ich_out); if (ret) { dev_err(di->dev, "%s setting icsr failed %d\n", __func__, __LINE__); return ret; } /* ChOutputCurentLevel: protected output current */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_OCSRV, (u8) curr_index); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Battery voltage when charging should be resumed after * completion of charging */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_CVREC, ab5500_cvrec_voltage_to_regval( di->bat->bat_type[di->bat->batt_id].recharge_vol)); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Battery temperature: * Input to the TBDATA register corresponds to the battery * temperature(temp being multiples of 2) * In order to obatain the value to be written to this reg * divide the temperature obtained from gpadc by 2 */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_TBDATA, di->bat->temp_now / 2); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* If success power on charging LED indication */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_LEDT, LED_ENABLE); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Register DCIOCURRENT is one among the charging watchdog * rekick sequence, hence irrespective of usb charging this * register will have to be written. */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_DCIOCURRENT, RESET); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } di->usb.charger_online = 1; } else { /* ChVoltLevel: max voltage upto which battery can be charged */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_VSRC, RESET); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* USBChInputCurr: current that can be drawn from the usb */ ret = ab5500_charger_set_vbus_in_curr(di, RESET); if (ret) { dev_err(di->dev, "%s resetting icsr failed %d\n", __func__, __LINE__); return ret; } /* If success power off charging LED indication */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_LEDT, RESET); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } di->usb.charger_online = 0; di->usb.wd_expired = false; dev_dbg(di->dev, "%s Disabled USB charging\n", __func__); } power_supply_changed(&di->usb_chg.psy); return ret; } /** * ab5500_charger_watchdog_kick() - kick charger watchdog * @di: pointer to the ab5500_charger structure * * Kick charger watchdog * Returns error code in case of failure else 0(on success) */ static int ab5500_charger_watchdog_kick(struct ux500_charger *charger) { int ret; struct ab5500_charger *di; int volt_index, curr_index; u8 value = 0; /* TODO: update */ if (charger->psy.type == POWER_SUPPLY_TYPE_USB) di = to_ab5500_charger_usb_device_info(charger); else return -ENXIO; ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_STARTUP, AB5500_MCB, &value); if (ret) dev_err(di->dev, "Failed to read!\n"); value = value | (SSW_ENABLE_REBOOT | SSW_REBOOT_EN | SSW_CONTROL_AUTOC | SSW_PSEL_480S); ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_STARTUP, AB5500_MCB, value); if (ret) dev_err(di->dev, "Failed to kick WD!\n"); volt_index = ab5500_voltage_to_regval( di->bat->bat_type[di->bat->batt_id].normal_vol_lvl); curr_index = ab5500_current_to_regval(di->max_usb_in_curr); /* ChVoltLevel: max voltage upto which battery can be charged */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_VSRC, (u8) volt_index); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* current that can be drawn from the usb */ ret = ab5500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); if (ret) { dev_err(di->dev, "%s setting icsr failed %d\n", __func__, __LINE__); return ret; } /* ChOutputCurentLevel: protected output current */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_OCSRV, (u8) curr_index); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Battery voltage when charging should be resumed after * completion of charging */ /* Charger_Vrechar[5:0] = '4.025 V' */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_CVREC, ab5500_cvrec_voltage_to_regval( di->bat->bat_type[di->bat->batt_id].recharge_vol)); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Battery temperature: * Input to the TBDATA register corresponds to the battery * temperature(temp being multiples of 2) * In order to obatain the value to be written to this reg * divide the temperature obtained from gpadc by 2 */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_TBDATA, di->bat->temp_now / 2); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } /* * Register DCIOCURRENT is one among the charging watchdog * rekick sequence, hence irrespective of usb charging this * register will have to be written. */ ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_DCIOCURRENT, RESET); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } return ret; } /** * ab5500_charger_update_charger_current() - update charger current * @di: pointer to the ab5500_charger structure * * Update the charger output current for the specified charger * Returns error code in case of failure else 0(on success) */ static int ab5500_charger_update_charger_current(struct ux500_charger *charger, int ich_out) { int ret = 0; int curr_index; struct ab5500_charger *di; if (charger->psy.type == POWER_SUPPLY_TYPE_USB) di = to_ab5500_charger_usb_device_info(charger); else return -ENXIO; curr_index = ab5500_current_to_regval(ich_out); if (curr_index < 0) { dev_err(di->dev, "Charger current too high, " "charging not started\n"); return -ENXIO; } ret = abx500_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_OCSRV, (u8) curr_index); if (ret) { dev_err(di->dev, "%s write failed %d\n", __func__, __LINE__); return ret; } return ret; } /** * ab5500_charger_check_hw_failure_work() - check main charger failure * @work: pointer to the work_struct structure * * Work queue function for checking the main charger status */ static void ab5500_charger_check_hw_failure_work(struct work_struct *work) { int ret; u8 reg_value; struct ab5500_charger *di = container_of(work, struct ab5500_charger, check_hw_failure_work.work); /* Check if the status bits for HW failure is still active */ if (di->flags.vbus_ovv) { ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_USB_PHY_STATUS, ®_value); if (ret < 0) { dev_err(di->dev, "%s ab5500 read failed\n", __func__); return; } if (!(reg_value & VBUS_OVV_TH)) { di->flags.vbus_ovv = false; power_supply_changed(&di->usb_chg.psy); } } /* If we still have a failure, schedule a new check */ if (di->flags.vbus_ovv) { queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, round_jiffies(HZ)); } } /** * ab5500_charger_detect_usb_type_work() - work to detect USB type * @work: Pointer to the work_struct structure * * Detect the type of USB plugged */ void ab5500_charger_detect_usb_type_work(struct work_struct *work) { int ret; struct ab5500_charger *di = container_of(work, struct ab5500_charger, detect_usb_type_work); /* * Since we can't be sure that the events are received * synchronously, we have the check if is * connected by reading the status register */ ret = ab5500_charger_detect_chargers(di); if (ret < 0) return; if (!(ret & USB_PW_CONN)) { di->vbus_detected = 0; di->usb.charger_connected = 0; power_supply_changed(&di->usb_chg.psy); } else { di->vbus_detected = 1; } } /** * ab5500_charger_usb_link_status_work() - work to detect USB type * @work: pointer to the work_struct structure * * Detect the type of USB plugged */ static void ab5500_charger_usb_link_status_work(struct work_struct *work) { int ret; struct ab5500_charger *di = container_of(work, struct ab5500_charger, usb_link_status_work); /* * Since we can't be sure that the events are received * synchronously, we have the check if is * connected by reading the status register */ ret = ab5500_charger_detect_chargers(di); if (ret < 0) return; if (!(ret & USB_PW_CONN)) { di->vbus_detected = 0; di->usb.charger_connected = 0; power_supply_changed(&di->usb_chg.psy); } else { di->vbus_detected = 1; ret = ab5500_charger_read_usb_type(di); if (!ret) { /* Update maximum input current */ ret = ab5500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); if (ret) return; di->usb.charger_connected = 1; power_supply_changed(&di->usb_chg.psy); } else if (ret == -ENXIO) { /* No valid charger type detected */ di->usb.charger_connected = 0; power_supply_changed(&di->usb_chg.psy); } } } static void ab5500_charger_usb_state_changed_work(struct work_struct *work) { int ret; struct ab5500_charger *di = container_of(work, struct ab5500_charger, usb_state_changed_work); if (!di->vbus_detected) return; spin_lock(&di->usb_state.usb_lock); di->usb_state.usb_changed = false; spin_unlock(&di->usb_state.usb_lock); /* * wait for some time until you get updates from the usb stack * and negotiations are completed */ msleep(250); if (di->usb_state.usb_changed) return; dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n", __func__, di->usb_state.state, di->usb_state.usb_current); switch (di->usb_state.state) { case AB5500_BM_USB_STATE_RESET_HS: case AB5500_BM_USB_STATE_RESET_FS: case AB5500_BM_USB_STATE_SUSPEND: case AB5500_BM_USB_STATE_MAX: di->usb.charger_connected = 0; power_supply_changed(&di->usb_chg.psy); break; case AB5500_BM_USB_STATE_RESUME: /* * when suspend->resume there should be delay * of 1sec for enabling charging */ msleep(1000); /* Intentional fall through */ case AB5500_BM_USB_STATE_CONFIGURED: /* * USB is configured, enable charging with the charging * input current obtained from USB driver */ if (!ab5500_charger_get_usb_cur(di)) { /* Update maximum input current */ ret = ab5500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); if (ret) return; di->usb.charger_connected = 1; power_supply_changed(&di->usb_chg.psy); } break; default: break; }; } /** * ab5500_charger_check_usbchargernotok_work() - check USB chg not ok status * @work: pointer to the work_struct structure * * Work queue function for checking the USB charger Not OK status */ static void ab5500_charger_check_usbchargernotok_work(struct work_struct *work) { int ret; u8 reg_value; bool prev_status; struct ab5500_charger *di = container_of(work, struct ab5500_charger, check_usbchgnotok_work.work); /* Check if the status bit for usbchargernotok is still active */ ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_CHGFSM_CHARGER_DETECT, ®_value); if (ret < 0) { dev_err(di->dev, "%s ab5500 read failed\n", __func__); return; } prev_status = di->flags.usbchargernotok; if (reg_value & VBUS_CH_NOK) { di->flags.usbchargernotok = true; /* Check again in 1sec */ queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, HZ); } else { di->flags.usbchargernotok = false; di->flags.vbus_collapse = false; } if (prev_status != di->flags.usbchargernotok) power_supply_changed(&di->usb_chg.psy); } /** * ab5500_charger_check_usb_thermal_prot_work() - check usb thermal status * @work: pointer to the work_struct structure * * Work queue function for checking the USB thermal prot status */ static void ab5500_charger_check_usb_thermal_prot_work( struct work_struct *work) { int ret; u8 reg_value; struct ab5500_charger *di = container_of(work, struct ab5500_charger, check_usb_thermal_prot_work); /* Check if the status bit for usb_thermal_prot is still active */ /* TODO: Interrupt source reg 15 bit 4 */ ret = abx500_get_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_CHGFSM_USB_BTEMP_CURR_LIM, ®_value); if (ret < 0) { dev_err(di->dev, "%s ab5500 read failed\n", __func__); return; } if (reg_value & USB_CH_TH_PROT_LOW || reg_value & USB_CH_TH_PROT_HIGH) di->flags.usb_thermal_prot = true; else di->flags.usb_thermal_prot = false; power_supply_changed(&di->usb_chg.psy); } /** * ab5500_charger_vbusdetf_handler() - VBUS falling detected * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_vbusdetf_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "VBUS falling detected\n"); queue_work(di->charger_wq, &di->detect_usb_type_work); return IRQ_HANDLED; } /** * ab5500_charger_vbusdetr_handler() - VBUS rising detected * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_vbusdetr_handler(int irq, void *_di) { struct ab5500_charger *di = _di; di->vbus_detected = true; dev_dbg(di->dev, "VBUS rising detected\n"); queue_work(di->charger_wq, &di->detect_usb_type_work); return IRQ_HANDLED; } /** * ab5500_charger_usblinkstatus_handler() - USB link status has changed * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_usblinkstatus_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "USB link status changed\n"); queue_work(di->charger_wq, &di->usb_link_status_work); return IRQ_HANDLED; } /** * ab5500_charger_usbchthprotr_handler() - Die temp is above usb charger * thermal protection threshold * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_usbchthprotr_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "Die temp above USB charger thermal protection threshold\n"); queue_work(di->charger_wq, &di->check_usb_thermal_prot_work); return IRQ_HANDLED; } /** * ab5500_charger_usbchargernotokr_handler() - USB charger not ok detected * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_usbchargernotokr_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "Not allowed USB charger detected\n"); queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0); return IRQ_HANDLED; } /** * ab5500_charger_chwdexp_handler() - Charger watchdog expired * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_chwdexp_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "Charger watchdog expired\n"); /* * The charger that was online when the watchdog expired * needs to be restarted for charging to start again */ if (di->usb.charger_online) { di->usb.wd_expired = true; power_supply_changed(&di->usb_chg.psy); } return IRQ_HANDLED; } /** * ab5500_charger_vbusovv_handler() - VBUS overvoltage detected * @irq: interrupt number * @_di: pointer to the ab5500_charger structure * * Returns IRQ status(IRQ_HANDLED) */ static irqreturn_t ab5500_charger_vbusovv_handler(int irq, void *_di) { struct ab5500_charger *di = _di; dev_dbg(di->dev, "VBUS overvoltage detected\n"); di->flags.vbus_ovv = true; power_supply_changed(&di->usb_chg.psy); /* Schedule a new HW failure check */ queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); return IRQ_HANDLED; } /** * ab5500_charger_usb_get_property() - get the usb properties * @psy: pointer to the power_supply structure * @psp: pointer to the power_supply_property structure * @val: pointer to the power_supply_propval union * * This function gets called when an application tries to get the usb * properties by reading the sysfs files. * USB properties are online, present and voltage. * online: usb charging is in progress or not * present: presence of the usb * voltage: vbus voltage * Returns error code in case of failure else 0(on success) */ static int ab5500_charger_usb_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct ab5500_charger *di; di = to_ab5500_charger_usb_device_info(psy_to_ux500_charger(psy)); switch (psp) { case POWER_SUPPLY_PROP_HEALTH: if (di->flags.usbchargernotok) val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; else if (di->usb.wd_expired) val->intval = POWER_SUPPLY_HEALTH_DEAD; else if (di->flags.usb_thermal_prot) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else if (di->flags.vbus_ovv) val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; else val->intval = POWER_SUPPLY_HEALTH_GOOD; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = di->usb.charger_online; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = di->usb.charger_connected; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: di->usb.charger_voltage = ab5500_charger_get_vbus_voltage(di); val->intval = di->usb.charger_voltage * 1000; break; case POWER_SUPPLY_PROP_CURRENT_NOW: val->intval = ab5500_charger_get_usb_current(di) * 1000; break; case POWER_SUPPLY_PROP_CURRENT_AVG: /* * This property is used to indicate when VBUS has collapsed * due to too high output current from the USB charger */ if (di->flags.vbus_collapse) val->intval = 1; else val->intval = 0; break; default: return -EINVAL; } return 0; } /** * ab5500_charger_hw_registers() - Set up charger related registers * @di: pointer to the ab5500_charger structure * * Set up charger OVV, watchdog and maximum voltage registers as well as * charging of the backup battery */ static int ab5500_charger_init_hw_registers(struct ab5500_charger *di) { int ret = 0; /* Enable ID Host and Device detection */ ret = abx500_mask_and_set_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_USB_OTG_CTRL, USB_ID_HOST_DET_ENA_MASK, USB_ID_HOST_DET_ENA); if (ret) { dev_err(di->dev, "failed to enable usb charger detection\n"); goto out; } ret = abx500_mask_and_set_register_interruptible(di->dev, AB5500_BANK_USB, AB5500_USB_OTG_CTRL, USB_ID_DEVICE_DET_ENA_MASK, USB_ID_DEVICE_DET_ENA); if (ret) { dev_err(di->dev, "failed to enable usb charger detection\n"); goto out; } /* Over current protection for reverse supply */ ret = abx500_mask_and_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_CREVS, CHARGER_REV_SUP, CHARGER_REV_SUP); if (ret) { dev_err(di->dev, "failed to enable over current protection for reverse supply\n"); goto out; } /* Enable SW EOC at flatcurrent detection */ ret = abx500_mask_and_set_register_interruptible(di->dev, AB5500_BANK_CHG, AB5500_CCTRL, SW_EOC, SW_EOC); if (ret) { dev_err(di->dev, "failed to enable end of charge at flatcurrent detection\n"); goto out; } out: return ret; } /* * ab5500 charger driver interrupts and their respective isr */ static struct ab5500_charger_interrupts ab5500_charger_irq[] = { {"VBUS_FALLING", ab5500_charger_vbusdetf_handler}, {"VBUS_RISING", ab5500_charger_vbusdetr_handler}, {"USB_LINK_UPDATE", ab5500_charger_usblinkstatus_handler}, {"USB_CH_TH_PROTECTION", ab5500_charger_usbchthprotr_handler}, {"USB_CH_NOT_OK", ab5500_charger_usbchargernotokr_handler}, {"OVV", ab5500_charger_vbusovv_handler}, /* TODO: Interrupt missing, will be available in cut 2 */ /*{"CHG_SW_TIMER_OUT", ab5500_charger_chwdexp_handler},*/ }; void ab5500_charger_usb_state_changed(u8 bm_usb_state, u16 mA) { struct ab5500_charger *di = static_di; dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n", __func__, bm_usb_state, mA); spin_lock(&di->usb_state.usb_lock); di->usb_state.usb_changed = true; spin_unlock(&di->usb_state.usb_lock); di->usb_state.state = bm_usb_state; di->usb_state.usb_current = mA; queue_work(di->charger_wq, &di->usb_state_changed_work); return; } EXPORT_SYMBOL(ab5500_charger_usb_state_changed); #if defined(CONFIG_PM) static int ab5500_charger_resume(struct platform_device *pdev) { struct ab5500_charger *di = platform_get_drvdata(pdev); /* If we still have a HW failure, schedule a new check */ if (di->flags.usbchargernotok || di->flags.vbus_ovv) { queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0); } return 0; } static int ab5500_charger_suspend(struct platform_device *pdev, pm_message_t state) { struct ab5500_charger *di = platform_get_drvdata(pdev); /* Cancel any pending HW failure check */ if (delayed_work_pending(&di->check_hw_failure_work)) cancel_delayed_work(&di->check_hw_failure_work); return 0; } #else #define ab5500_charger_suspend NULL #define ab5500_charger_resume NULL #endif static int __devexit ab5500_charger_remove(struct platform_device *pdev) { struct ab5500_charger *di = platform_get_drvdata(pdev); int i, irq; /* Disable USB charging */ ab5500_charger_usb_en(&di->usb_chg, false, 0, 0); /* Disable interrupts */ for (i = 0; i < ARRAY_SIZE(ab5500_charger_irq); i++) { irq = platform_get_irq_byname(pdev, ab5500_charger_irq[i].name); free_irq(irq, di); } /* Delete the work queue */ destroy_workqueue(di->charger_wq); flush_scheduled_work(); power_supply_unregister(&di->usb_chg.psy); platform_set_drvdata(pdev, NULL); kfree(di); return 0; } static int __devinit ab5500_charger_probe(struct platform_device *pdev) { int irq, i, charger_status, ret = 0; struct abx500_bm_plat_data *plat_data; struct ab5500_charger *di = kzalloc(sizeof(struct ab5500_charger), GFP_KERNEL); if (!di) return -ENOMEM; static_di = di; /* get parent data */ di->dev = &pdev->dev; di->parent = dev_get_drvdata(pdev->dev.parent); di->gpadc = ab5500_gpadc_get("ab5500-adc.0"); /* initialize lock */ spin_lock_init(&di->usb_state.usb_lock); plat_data = pdev->dev.platform_data; di->pdata = plat_data->charger; di->bat = plat_data->battery; /* get charger specific platform data */ if (!di->pdata) { dev_err(di->dev, "no charger platform data supplied\n"); ret = -EINVAL; goto free_device_info; } /* get battery specific platform data */ if (!di->bat) { dev_err(di->dev, "no battery platform data supplied\n"); ret = -EINVAL; goto free_device_info; } /* USB supply */ /* power_supply base class */ di->usb_chg.psy.name = "ab5500_usb"; di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB; di->usb_chg.psy.properties = ab5500_charger_usb_props; di->usb_chg.psy.num_properties = ARRAY_SIZE(ab5500_charger_usb_props); di->usb_chg.psy.get_property = ab5500_charger_usb_get_property; di->usb_chg.psy.supplied_to = di->pdata->supplied_to; di->usb_chg.psy.num_supplicants = di->pdata->num_supplicants; /* ux500_charger sub-class */ di->usb_chg.ops.enable = &ab5500_charger_usb_en; di->usb_chg.ops.kick_wd = &ab5500_charger_watchdog_kick; di->usb_chg.ops.update_curr = &ab5500_charger_update_charger_current; di->usb_chg.max_out_volt = ab5500_charger_voltage_map[ ARRAY_SIZE(ab5500_charger_voltage_map) - 1]; di->usb_chg.max_out_curr = ab5500_charger_current_map[ ARRAY_SIZE(ab5500_charger_current_map) - 1]; /* Create a work queue for the charger */ di->charger_wq = create_singlethread_workqueue("ab5500_charger_wq"); if (di->charger_wq == NULL) { dev_err(di->dev, "failed to create work queue\n"); goto free_device_info; } /* Init work for HW failure check */ INIT_DELAYED_WORK_DEFERRABLE(&di->check_hw_failure_work, ab5500_charger_check_hw_failure_work); INIT_DELAYED_WORK_DEFERRABLE(&di->check_usbchgnotok_work, ab5500_charger_check_usbchargernotok_work); /* Init work for charger detection */ INIT_WORK(&di->usb_link_status_work, ab5500_charger_usb_link_status_work); INIT_WORK(&di->detect_usb_type_work, ab5500_charger_detect_usb_type_work); INIT_WORK(&di->usb_state_changed_work, ab5500_charger_usb_state_changed_work); /* Init work for checking HW status */ INIT_WORK(&di->check_usb_thermal_prot_work, ab5500_charger_check_usb_thermal_prot_work); /* Get Chip ID of the ABB ASIC */ ret = abx500_get_chip_id(di->dev); if (ret < 0) { dev_err(di->dev, "failed to get chip ID\n"); goto free_charger_wq; } di->chip_id = ret; dev_dbg(di->dev, "AB5500 CID is: 0x%02x\n", di->chip_id); /* Initialize OVV, and other registers */ ret = ab5500_charger_init_hw_registers(di); if (ret) { dev_err(di->dev, "failed to initialize ABB registers\n"); goto free_device_info; } /* Register USB charger class */ ret = power_supply_register(di->dev, &di->usb_chg.psy); if (ret) { dev_err(di->dev, "failed to register USB charger\n"); goto free_device_info; } /* Identify the connected charger types during startup */ charger_status = ab5500_charger_detect_chargers(di); if (charger_status & USB_PW_CONN) { dev_dbg(di->dev, "VBUS Detect during startup\n"); di->vbus_detected = true; di->vbus_detected_start = true; queue_work(di->charger_wq, &di->usb_link_status_work); } /* Register interrupts */ for (i = 0; i < ARRAY_SIZE(ab5500_charger_irq); i++) { irq = platform_get_irq_byname(pdev, ab5500_charger_irq[i].name); ret = request_threaded_irq(irq, NULL, ab5500_charger_irq[i].isr, IRQF_SHARED | IRQF_NO_SUSPEND, ab5500_charger_irq[i].name, di); if (ret != 0) { dev_err(di->dev, "failed to request %s IRQ %d: %d\n" , ab5500_charger_irq[i].name, irq, ret); goto free_irq; } dev_dbg(di->dev, "Requested %s IRQ %d: %d\n", ab5500_charger_irq[i].name, irq, ret); } platform_set_drvdata(pdev, di); dev_info(di->dev, "probe success\n"); return ret; free_irq: power_supply_unregister(&di->usb_chg.psy); /* We also have to free all successfully registered irqs */ for (i = i - 1; i >= 0; i--) { irq = platform_get_irq_byname(pdev, ab5500_charger_irq[i].name); free_irq(irq, di); } free_charger_wq: destroy_workqueue(di->charger_wq); free_device_info: kfree(di); return ret; } static struct platform_driver ab5500_charger_driver = { .probe = ab5500_charger_probe, .remove = __devexit_p(ab5500_charger_remove), .suspend = ab5500_charger_suspend, .resume = ab5500_charger_resume, .driver = { .name = "ab5500-charger", .owner = THIS_MODULE, }, }; static int __init ab5500_charger_init(void) { return platform_driver_register(&ab5500_charger_driver); } static void __exit ab5500_charger_exit(void) { platform_driver_unregister(&ab5500_charger_driver); } subsys_initcall_sync(ab5500_charger_init); module_exit(ab5500_charger_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Johan Palsson, Karl Komierowski"); MODULE_ALIAS("platform:ab5500-charger"); MODULE_DESCRIPTION("AB5500 charger management driver");