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authorKever Yang <kever.yang@rock-chips.com>2017-03-10 12:05:14 +0800
committerMarek Vasut <marex@denx.de>2017-04-14 14:07:46 +0200
commit5c73536738e1aa411b127d84dff41a5e60a4e610 (patch)
tree92e78508316b210ed09880c65886df02566e1423
parent40a808f173008729a0c631ab84693b6a2b0dcfc9 (diff)
usb: dwc2: add support for external vbus supply
Some board do not use the dwc2 internal VBUS_DRV signal, but use a gpio pin to enable the 5.0V VBUS power, add interface to enable the power in dwc2 driver. Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Signed-off-by: Simon Glass <sjg@chromium.org>
-rw-r--r--drivers/usb/host/dwc2.c43
1 files changed, 38 insertions, 5 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index d253b946f3..ae7d8fb1da 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -15,6 +15,7 @@
#include <usbroothubdes.h>
#include <wait_bit.h>
#include <asm/io.h>
+#include <power/regulator.h>
#include "dwc2.h"
@@ -159,6 +160,33 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
mdelay(100);
}
+#if defined(CONFIG_DM_USB) && defined(CONFIG_DM_REGULATOR)
+static int dwc_vbus_supply_init(struct udevice *dev)
+{
+ struct udevice *vbus_supply;
+ int ret;
+
+ ret = device_get_supply_regulator(dev, "vbus-supply", &vbus_supply);
+ if (ret) {
+ debug("%s: No vbus supply\n", dev->name);
+ return 0;
+ }
+
+ ret = regulator_set_enable(vbus_supply, true);
+ if (ret) {
+ error("Error enabling vbus supply\n");
+ return ret;
+ }
+
+ return 0;
+}
+#else
+static int dwc_vbus_supply_init(struct udevice *dev)
+{
+ return 0;
+}
+#endif
+
/*
* This function initializes the DWC_otg controller registers for
* host mode.
@@ -167,10 +195,12 @@ static void dwc_otg_core_reset(struct dwc2_core_regs *regs)
* request queues. Host channels are reset to ensure that they are ready for
* performing transfers.
*
+ * @param dev USB Device (NULL if driver model is not being used)
* @param regs Programming view of DWC_otg controller
*
*/
-static void dwc_otg_core_host_init(struct dwc2_core_regs *regs)
+static void dwc_otg_core_host_init(struct udevice *dev,
+ struct dwc2_core_regs *regs)
{
uint32_t nptxfifosize = 0;
uint32_t ptxfifosize = 0;
@@ -248,6 +278,9 @@ static void dwc_otg_core_host_init(struct dwc2_core_regs *regs)
writel(hprt0, &regs->hprt0);
}
}
+
+ if (dev)
+ dwc_vbus_supply_init(dev);
}
/*
@@ -1048,7 +1081,7 @@ int _submit_int_msg(struct dwc2_priv *priv, struct usb_device *dev,
}
}
-static int dwc2_init_common(struct dwc2_priv *priv)
+static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv)
{
struct dwc2_core_regs *regs = priv->regs;
uint32_t snpsid;
@@ -1070,7 +1103,7 @@ static int dwc2_init_common(struct dwc2_priv *priv)
#endif
dwc_otg_core_init(priv);
- dwc_otg_core_host_init(regs);
+ dwc_otg_core_host_init(dev, regs);
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG |
@@ -1143,7 +1176,7 @@ int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
if (board_usb_init(index, USB_INIT_HOST))
return -1;
- return dwc2_init_common(priv);
+ return dwc2_init_common(NULL, priv);
}
int usb_lowlevel_stop(int index)
@@ -1214,7 +1247,7 @@ static int dwc2_usb_probe(struct udevice *dev)
bus_priv->desc_before_addr = true;
- return dwc2_init_common(priv);
+ return dwc2_init_common(dev, priv);
}
static int dwc2_usb_remove(struct udevice *dev)