diff options
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 8 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_regs.h | 5 | ||||
| -rw-r--r-- | include/linux/usb/musb.h | 3 |
3 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 4c8962f976b..074d380bf88 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 473a94ef905..9a8621ac5ac 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 d4375566926..4b7f8fa252f 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); |