summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/usb/musb/musb_core.c8
-rw-r--r--drivers/usb/musb/musb_regs.h5
-rw-r--r--include/linux/usb/musb.h3
3 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4c8962f..074d380 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2031,6 +2031,7 @@ bad_config:
/* host side needs more setup */
if (is_host_enabled(musb)) {
struct usb_hcd *hcd = musb_to_hcd(musb);
+ u8 busctl;
otg_set_host(musb->xceiv, &hcd->self);
@@ -2038,6 +2039,13 @@ bad_config:
hcd->self.otg_port = 1;
musb->xceiv->host = &hcd->self;
hcd->power_budget = 2 * (plat->power ? : 250);
+
+ /* program PHY to use external vBus if required */
+ if (plat->extvbus) {
+ busctl = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL);
+ busctl |= MUSB_ULPI_USE_EXTVBUS;
+ musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl);
+ }
}
/* For the host-only role, we can activate right away.
diff --git a/drivers/usb/musb/musb_regs.h b/drivers/usb/musb/musb_regs.h
index 473a94e..9a8621a 100644
--- a/drivers/usb/musb/musb_regs.h
+++ b/drivers/usb/musb/musb_regs.h
@@ -72,6 +72,10 @@
#define MUSB_DEVCTL_HR 0x02
#define MUSB_DEVCTL_SESSION 0x01
+/* MUSB ULPI VBUSCONTROL */
+#define MUSB_ULPI_USE_EXTVBUS 0x01
+#define MUSB_ULPI_USE_EXTVBUSIND 0x02
+
/* TESTMODE */
#define MUSB_TEST_FORCE_HOST 0x80
#define MUSB_TEST_FIFO_ACCESS 0x40
@@ -246,6 +250,7 @@
/* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
#define MUSB_HWVERS 0x6C /* 8 bit */
+#define MUSB_ULPI_BUSCONTROL 0x70 /* 8 bit */
#define MUSB_EPINFO 0x78 /* 8 bit */
#define MUSB_RAMINFO 0x79 /* 8 bit */
diff --git a/include/linux/usb/musb.h b/include/linux/usb/musb.h
index d437556..4b7f8fa 100644
--- a/include/linux/usb/musb.h
+++ b/include/linux/usb/musb.h
@@ -76,6 +76,9 @@ struct musb_hdrc_platform_data {
/* (HOST or OTG) msec/2 after VBUS on till power good */
u8 potpgt;
+ /* (HOST or OTG) program PHY for external Vbus */
+ unsigned extvbus:1;
+
/* Power the device on or off */
int (*set_power)(int state);