diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/ab8500_charger.c | 79 |
1 files changed, 63 insertions, 16 deletions
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c index 6ba7efff..d5a8bda 100644 --- a/drivers/power/ab8500_charger.c +++ b/drivers/power/ab8500_charger.c @@ -88,6 +88,9 @@ /* Step up/down delay in us */ #define STEP_UDELAY 1000 +/* Wait for enumeration before charging in ms */ +#define WAIT_FOR_USB_ENUMERATION 5 * 1000 + #define CHARGER_STATUS_POLL 10 /* in ms */ /* UsbLineStatus register - usb types */ @@ -201,6 +204,7 @@ struct ab8500_charger_usb_state { * charger is enabled * @vbat Battery voltage * @old_vbat Previously measured battery voltage + * @usb_device_is_unrecognised USB device is unrecognised by the hardware * @autopower Indicate if we should have automatic pwron after pwrloss * @autopower_cfg platform specific power config support for "pwron after pwrloss" * @parent: Pointer to the struct ab8500 @@ -219,6 +223,7 @@ struct ab8500_charger_usb_state { * @check_usbchgnotok_work: Work for checking USB charger not ok status * @kick_wd_work: Work for kicking the charger watchdog in case * of ABB rev 1.* due to the watchog logic bug + * @attach_work: Work for checking the usb enumeration * @ac_charger_attached_work: Work for checking if AC charger is still * connected * @usb_charger_attached_work: Work for checking if USB charger is still @@ -243,6 +248,7 @@ struct ab8500_charger { bool vddadc_en_usb; int vbat; int old_vbat; + bool usb_device_is_unrecognised; bool autopower; bool autopower_cfg; struct ab8500 *parent; @@ -260,6 +266,7 @@ struct ab8500_charger { struct delayed_work check_hw_failure_work; struct delayed_work check_usbchgnotok_work; struct delayed_work kick_wd_work; + struct delayed_work attach_work; struct delayed_work ac_charger_attached_work; struct delayed_work usb_charger_attached_work; struct work_struct ac_work; @@ -597,6 +604,8 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, { int ret = 0; + di->usb_device_is_unrecognised = false; + switch (link_status) { case USB_STAT_STD_HOST_NC: case USB_STAT_STD_HOST_C_NS: @@ -642,9 +651,15 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, di->max_usb_in_curr); break; + case USB_STAT_NOT_CONFIGURED: + if (di->vbus_detected) { + di->usb_device_is_unrecognised = true; + dev_dbg(di->dev, "USB Type - Legacy charger.\n"); + di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; + break; + } case USB_STAT_HM_IDGND: case USB_STAT_NOT_VALID_LINK: - case USB_STAT_NOT_CONFIGURED: dev_err(di->dev, "USB Type - Charging not allowed\n"); di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; ret = -ENXIO; @@ -1912,6 +1927,29 @@ static void ab8500_charger_detect_usb_type_work(struct work_struct *work) } /** + * ab8500_charger_usb_link_attach_work() - delayd work to detect USB type + * @work: pointer to the work_struct structure + * + * Detect the type of USB plugged + */ +static void ab8500_charger_usb_link_attach_work(struct work_struct *work) +{ + struct ab8500_charger *di = + container_of(work, struct ab8500_charger, attach_work.work); + int ret; + + /* Update maximum input current if USB enumeration is not detected */ + if (!di->usb.charger_online) { + ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); + if (ret) + return; + } + + ab8500_charger_set_usb_connected(di, true); + ab8500_power_supply_changed(di, &di->usb_chg.psy); +} + +/** * ab8500_charger_usb_link_status_work() - work to detect USB type * @work: pointer to the work_struct structure * @@ -1937,23 +1975,29 @@ static void ab8500_charger_usb_link_status_work(struct work_struct *work) di->vbus_detected = 0; ab8500_charger_set_usb_connected(di, false); ab8500_power_supply_changed(di, &di->usb_chg.psy); - } else { - di->vbus_detected = 1; - ret = ab8500_charger_read_usb_type(di); - if (!ret) { - /* Update maximum input current */ - ret = ab8500_charger_set_vbus_in_curr(di, - di->max_usb_in_curr); - if (ret) - return; + return; + } - ab8500_charger_set_usb_connected(di, true); - ab8500_power_supply_changed(di, &di->usb_chg.psy); - } else if (ret == -ENXIO) { - /* No valid charger type detected */ - ab8500_charger_set_usb_connected(di, false); - ab8500_power_supply_changed(di, &di->usb_chg.psy); + di->vbus_detected = 1; + ret = ab8500_charger_read_usb_type(di); + if (!ret) { + if (di->usb_device_is_unrecognised) { + dev_dbg(di->dev, + "Potential Legacy Charger device. " + "Delay work for %d msec for USB enum " + "to finish", + WAIT_FOR_USB_ENUMERATION); + queue_delayed_work(di->charger_wq, + &di->attach_work, + msecs_to_jiffies(WAIT_FOR_USB_ENUMERATION)); + } else { + queue_delayed_work(di->charger_wq, + &di->attach_work, 0); } + } else if (ret == -ENXIO) { + /* No valid charger type detected */ + ab8500_charger_set_usb_connected(di, false); + ab8500_power_supply_changed(di, &di->usb_chg.psy); } } @@ -2911,6 +2955,9 @@ static int ab8500_charger_probe(struct platform_device *pdev) INIT_DEFERRABLE_WORK(&di->check_vbat_work, ab8500_charger_check_vbat_work); + INIT_DELAYED_WORK(&di->attach_work, + ab8500_charger_usb_link_attach_work); + /* Init work for charger detection */ INIT_WORK(&di->usb_link_status_work, ab8500_charger_usb_link_status_work); |
