diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-omap.c | 1 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 6 | ||||
| -rw-r--r-- | drivers/usb/phy/omap_usb_phy.c | 17 |
3 files changed, 19 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-omap.c b/drivers/usb/host/xhci-omap.c index e667810bb3..912b2bd8d5 100644 --- a/drivers/usb/host/xhci-omap.c +++ b/drivers/usb/host/xhci-omap.c @@ -98,6 +98,7 @@ static int omap_xhci_core_init(struct omap_xhci *omap) { int ret = 0; + usb_phy_power(1); omap_enable_phy(omap); ret = dwc3_core_init(omap->dwc3_reg); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index ceb1573d86..6685ed23de 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -20,9 +20,7 @@ #include <asm/cache.h> #include <asm/io.h> #include <linux/list.h> - -#define upper_32_bits(n) (u32)((n) >> 32) -#define lower_32_bits(n) (u32)(n) +#include <linux/compat.h> #define MAX_EP_CTX_NUM 31 #define XHCI_ALIGNMENT 64 @@ -1121,7 +1119,7 @@ static inline void xhci_writeq(__le64 volatile *regs, const u64 val) __u32 *ptr = (__u32 *)regs; u32 val_lo = lower_32_bits(val); /* FIXME */ - u32 val_hi = 0; + u32 val_hi = upper_32_bits(val); writel(val_lo, ptr); writel(val_hi, ptr + 1); } diff --git a/drivers/usb/phy/omap_usb_phy.c b/drivers/usb/phy/omap_usb_phy.c index af46db2edd..f78d532966 100644 --- a/drivers/usb/phy/omap_usb_phy.c +++ b/drivers/usb/phy/omap_usb_phy.c @@ -222,7 +222,22 @@ static void am437x_enable_usb2_phy2(struct omap_xhci *omap) void usb_phy_power(int on) { - return; + u32 val; + + /* USB1_CTRL */ + val = readl(USB1_CTRL); + if (on) { + /* + * these bits are re-used on AM437x to power up/down the USB + * CM and OTG PHYs, if we don't toggle them, USB will not be + * functional on newer silicon revisions + */ + val &= ~(USB1_CTRL_CM_PWRDN | USB1_CTRL_OTG_PWRDN); + } else { + val |= USB1_CTRL_CM_PWRDN | USB1_CTRL_OTG_PWRDN; + } + + writel(val, USB1_CTRL); } #endif /* CONFIG_AM437X_USB2PHY2_HOST */ |