USB: dwc3_otg: Add support for USB charging
Currently USB charging is not supported. Hence implement
charging API to notify PMIC to start/stop charging during
USB cable connect/disconnect respectively.
Also don't enable PHY interrupts for VBUS and ID if depends
on PMIC notifications.
Change-Id: Ie612101a3fc04b3d406f6a6ca2b928713f017b15
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
diff --git a/drivers/usb/dwc3/dwc3_otg.c b/drivers/usb/dwc3/dwc3_otg.c
index f96b88a..1aa8519 100644
--- a/drivers/usb/dwc3/dwc3_otg.c
+++ b/drivers/usb/dwc3/dwc3_otg.c
@@ -25,6 +25,9 @@
static void dwc3_otg_reset(struct dwc3_otg *dotg);
+static void dwc3_otg_notify_host_mode(struct usb_otg *otg, int host_mode);
+static void dwc3_otg_reset(struct dwc3_otg *dotg);
+
/**
* dwc3_otg_set_host_regs - reset dwc3 otg registers to host operation.
*
@@ -124,6 +127,7 @@
return ret;
}
+ dwc3_otg_notify_host_mode(otg, on);
ret = regulator_enable(dotg->vbus_otg);
if (ret) {
dev_err(otg->phy->dev, "unable to enable vbus_otg\n");
@@ -143,6 +147,7 @@
dev_err(otg->phy->dev, "unable to disable vbus_otg\n");
return ret;
}
+ dwc3_otg_notify_host_mode(otg, on);
/* re-init core and OTG register as XHCI reset clears it */
dwc3_post_host_reset_core_init(dotg->dwc);
@@ -290,9 +295,11 @@
static void dwc3_ext_event_notify(struct usb_otg *otg,
enum dwc3_ext_events event)
{
+ static bool init;
struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);
struct dwc3_ext_xceiv *ext_xceiv = dotg->ext_xceiv;
struct usb_phy *phy = dotg->otg.phy;
+ int ret = 0;
if (event == DWC3_EVENT_PHY_RESUME) {
if (!pm_runtime_status_suspended(phy->dev)) {
@@ -300,7 +307,16 @@
} else {
dev_dbg(phy->dev, "ext PHY_RESUME event received\n");
/* ext_xceiver would have taken h/w out of LPM by now */
- pm_runtime_get(phy->dev);
+ ret = pm_runtime_get(phy->dev);
+ if (ret == -EACCES) {
+ /* pm_runtime_get may fail during system
+ resume with -EACCES error */
+ pm_runtime_disable(phy->dev);
+ pm_runtime_set_active(phy->dev);
+ pm_runtime_enable(phy->dev);
+ } else if (ret < 0) {
+ dev_warn(phy->dev, "pm_runtime_get failed!\n");
+ }
}
} else if (event == DWC3_EVENT_XCEIV_STATE) {
if (ext_xceiv->id == DWC3_ID_FLOAT)
@@ -308,11 +324,20 @@
else
clear_bit(ID, &dotg->inputs);
- if (ext_xceiv->bsv)
+ if (ext_xceiv->bsv) {
+ dev_dbg(phy->dev, "XCVR: BSV set\n");
set_bit(B_SESS_VLD, &dotg->inputs);
- else
+ } else {
+ dev_dbg(phy->dev, "XCVR: BSV clear\n");
clear_bit(B_SESS_VLD, &dotg->inputs);
+ }
+ if (!init) {
+ init = true;
+ complete(&dotg->dwc3_xcvr_vbus_init);
+ dev_dbg(phy->dev, "XCVR: BSV init complete\n");
+ return;
+ }
schedule_work(&dotg->sm_work);
}
}
@@ -335,6 +360,72 @@
return 0;
}
+static void dwc3_otg_notify_host_mode(struct usb_otg *otg, int host_mode)
+{
+ struct dwc3_otg *dotg = container_of(otg, struct dwc3_otg, otg);
+
+ if (!dotg->psy) {
+ dev_err(otg->phy->dev, "no usb power supply registered\n");
+ return;
+ }
+
+ if (host_mode)
+ power_supply_set_scope(dotg->psy, POWER_SUPPLY_SCOPE_SYSTEM);
+ else
+ power_supply_set_scope(dotg->psy, POWER_SUPPLY_SCOPE_DEVICE);
+}
+
+static int dwc3_otg_set_power(struct usb_phy *phy, unsigned mA)
+{
+ static int power_supply_type;
+ struct dwc3_otg *dotg = container_of(phy->otg, struct dwc3_otg, otg);
+
+
+ if (!dotg->psy) {
+ dev_err(phy->dev, "no usb power supply registered\n");
+ return 0;
+ }
+
+ if (dotg->charger->chg_type == DWC3_SDP_CHARGER)
+ power_supply_type = POWER_SUPPLY_TYPE_USB;
+ else if (dotg->charger->chg_type == DWC3_CDP_CHARGER)
+ power_supply_type = POWER_SUPPLY_TYPE_USB_CDP;
+ else if (dotg->charger->chg_type == DWC3_DCP_CHARGER)
+ power_supply_type = POWER_SUPPLY_TYPE_USB_DCP;
+ else
+ power_supply_type = POWER_SUPPLY_TYPE_BATTERY;
+
+ power_supply_set_supply_type(dotg->psy, power_supply_type);
+
+ if (dotg->charger->max_power == mA)
+ return 0;
+
+ dev_info(phy->dev, "Avail curr from USB = %u\n", mA);
+
+ if (dotg->charger->max_power <= 2 && mA > 2) {
+ /* Enable charging */
+ if (power_supply_set_online(dotg->psy, true))
+ goto psy_error;
+ if (power_supply_set_current_limit(dotg->psy, 1000*mA))
+ goto psy_error;
+ } else if (dotg->charger->max_power > 0 && (mA == 0 || mA == 2)) {
+ /* Disable charging */
+ if (power_supply_set_online(dotg->psy, false))
+ goto psy_error;
+ /* Set max current limit */
+ if (power_supply_set_current_limit(dotg->psy, 0))
+ goto psy_error;
+ }
+
+ power_supply_changed(dotg->psy);
+ dotg->charger->max_power = mA;
+ return 0;
+
+psy_error:
+ dev_dbg(phy->dev, "power supply error when setting property\n");
+ return -ENXIO;
+}
+
/* IRQs which OTG driver is interested in handling */
#define DWC3_OEVT_MASK (DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT | \
DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT)
@@ -401,23 +492,32 @@
{
u32 osts = dwc3_readl(dotg->regs, DWC3_OSTS);
struct usb_phy *phy = dotg->otg.phy;
-
- /*
- * TODO: If using external notifications then wait here till initial
- * state is reported
- */
+ struct dwc3_ext_xceiv *ext_xceiv;
+ int ret;
dev_dbg(phy->dev, "Initialize OTG inputs, osts: 0x%x\n", osts);
- if (osts & DWC3_OTG_OSTS_CONIDSTS)
- set_bit(ID, &dotg->inputs);
- else
- clear_bit(ID, &dotg->inputs);
+ /*
+ * VBUS initial state is reported after PMIC
+ * driver initialization. Wait for it.
+ */
+ ret = wait_for_completion_timeout(&dotg->dwc3_xcvr_vbus_init, HZ * 5);
+ if (!ret)
+ dev_err(phy->dev, "%s: completion timeout\n", __func__);
- if (osts & DWC3_OTG_OSTS_BSESVALID)
- set_bit(B_SESS_VLD, &dotg->inputs);
- else
- clear_bit(B_SESS_VLD, &dotg->inputs);
+ ext_xceiv = dotg->ext_xceiv;
+ dwc3_otg_reset(dotg);
+ if (ext_xceiv && !ext_xceiv->otg_capability) {
+ if (osts & DWC3_OTG_OSTS_CONIDSTS)
+ set_bit(ID, &dotg->inputs);
+ else
+ clear_bit(ID, &dotg->inputs);
+
+ if (osts & DWC3_OTG_OSTS_BSESVALID)
+ set_bit(B_SESS_VLD, &dotg->inputs);
+ else
+ clear_bit(B_SESS_VLD, &dotg->inputs);
+ }
}
/**
@@ -442,6 +542,14 @@
switch (phy->state) {
case OTG_STATE_UNDEFINED:
dwc3_otg_init_sm(dotg);
+ if (!dotg->psy) {
+ dotg->psy = power_supply_get_by_name("usb");
+
+ if (!dotg->psy)
+ dev_err(phy->dev,
+ "couldn't get usb power supply\n");
+ }
+
/* Switch to A or B-Device according to ID / BSV */
if (!test_bit(ID, &dotg->inputs)) {
dev_dbg(phy->dev, "!id\n");
@@ -478,9 +586,13 @@
switch (charger->chg_type) {
case DWC3_DCP_CHARGER:
dev_dbg(phy->dev, "lpm, DCP charger\n");
+ dwc3_otg_set_power(phy,
+ DWC3_IDEV_CHG_MAX);
pm_runtime_put_sync(phy->dev);
break;
case DWC3_CDP_CHARGER:
+ dwc3_otg_set_power(phy,
+ DWC3_IDEV_CHG_MAX);
dwc3_otg_start_peripheral(&dotg->otg,
1);
phy->state = OTG_STATE_B_PERIPHERAL;
@@ -521,6 +633,7 @@
charger->chg_type =
DWC3_INVALID_CHARGER;
}
+ dwc3_otg_set_power(phy, 0);
dev_dbg(phy->dev, "No device, trying to suspend\n");
pm_runtime_put_sync(phy->dev);
}
@@ -587,6 +700,8 @@
static void dwc3_otg_reset(struct dwc3_otg *dotg)
{
static int once;
+ struct dwc3_ext_xceiv *ext_xceiv = dotg->ext_xceiv;
+
/*
* OCFG[2] - OTG-Version = 1
* OCFG[1] - HNPCap = 0
@@ -612,9 +727,10 @@
dwc3_writel(dotg->regs, DWC3_OEVT, 0xFFFF);
/* Enable ID/BSV StsChngEn event*/
- dwc3_writel(dotg->regs, DWC3_OEVTEN,
- DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT |
- DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT);
+ if (ext_xceiv && !ext_xceiv->otg_capability)
+ dwc3_writel(dotg->regs, DWC3_OEVTEN,
+ DWC3_OEVTEN_OTGCONIDSTSCHNGEVNT |
+ DWC3_OEVTEN_OTGBDEVVBUSCHNGEVNT);
}
/**
@@ -687,6 +803,7 @@
dotg->dwc = dwc;
dotg->otg.phy->otg = &dotg->otg;
dotg->otg.phy->dev = dwc->dev;
+ dotg->otg.phy->set_power = dwc3_otg_set_power;
ret = usb_set_transceiver(dotg->otg.phy);
if (ret) {
@@ -696,10 +813,9 @@
goto err2;
}
- dwc3_otg_reset(dotg);
-
dotg->otg.phy->state = OTG_STATE_UNDEFINED;
+ init_completion(&dotg->dwc3_xcvr_vbus_init);
INIT_WORK(&dotg->sm_work, dwc3_otg_sm_work);
ret = request_irq(dotg->irq, dwc3_otg_interrupt, IRQF_SHARED,