[U-Boot] [PATCH 3/4] usb: dwc2: Make OC protection configurable
Marek Vasut
marex at denx.de
Wed Apr 27 15:24:05 CEST 2016
Introduce a new flag in the controller private data, which allows selectively
disabling the OC protection. Use the standard 'disable-over-current' OF prop
to set this flag. This OC protection must be disabled on EBV SoCrates rev 1.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Stefan Roese <sr at denx.de>
Cc: Dinh Nguyen <dinguyen at kernel.org>
---
drivers/usb/host/dwc2.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 5673220..0c4adaf 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -18,6 +18,8 @@
#include "dwc2.h"
+DECLARE_GLOBAL_DATA_PTR;
+
/* Use only HC channel 0. */
#define DWC2_HC_CHANNEL 0
@@ -40,6 +42,7 @@ struct dwc2_priv {
struct dwc2_core_regs *regs;
int root_hub_devnum;
bool ext_vbus;
+ bool oc_disable;
};
#ifndef CONFIG_DM_USB
@@ -265,9 +268,11 @@ static void dwc_otg_core_init(struct dwc2_priv *priv)
/* Program the ULPI External VBUS bit if needed */
if (priv->ext_vbus) {
- usbcfg |= (DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV |
- DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR |
- DWC2_GUSBCFG_INDICATOR_PASSTHROUGH);
+ usbcfg |= DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
+ if (!priv->oc_disable) {
+ usbcfg |= DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR |
+ DWC2_GUSBCFG_INDICATOR_PASSTHROUGH;
+ }
} else {
usbcfg &= ~DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
}
@@ -1177,6 +1182,7 @@ static int dwc2_submit_int_msg(struct udevice *dev, struct usb_device *udev,
static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
+ const void *prop;
fdt_addr_t addr;
addr = dev_get_addr(dev);
@@ -1184,6 +1190,11 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
return -EINVAL;
priv->regs = (struct dwc2_core_regs *)addr;
+ prop = fdt_getprop(gd->fdt_blob, dev->of_offset, "disable-over-current",
+ NULL);
+ if (prop)
+ priv->oc_disable = true;
+
return 0;
}
--
2.7.0
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