diff options
Diffstat (limited to 'arch/arm/mach-mvf/usb_dr.c')
| -rw-r--r-- | arch/arm/mach-mvf/usb_dr.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-mvf/usb_dr.c b/arch/arm/mach-mvf/usb_dr.c index bbd29f3b45a9..c063193364d1 100644 --- a/arch/arm/mach-mvf/usb_dr.c +++ b/arch/arm/mach-mvf/usb_dr.c @@ -90,6 +90,7 @@ static int usb_phy_enable(struct fsl_usb2_platform_data *pdata) u32 tmp; void __iomem *phy_reg = MVF_IO_ADDRESS(MVF_USBPHY0_BASE_ADDR); void __iomem *phy_ctrl; + void __iomem *phy_param; /* Stop then Reset */ UOG_USBCMD &= ~UCMD_RUN_STOP; @@ -115,6 +116,17 @@ static int usb_phy_enable(struct fsl_usb2_platform_data *pdata) /* Power up the PHY */ __raw_writel(0, phy_reg + HW_USBPHY_PWD); + /* + * For USB Certification + * TX: set edge rate to max, increase the amplitude + * with 2 steps (Level = ~ 437 mV). + * RX: reduce transmission envelope detector level with about 20 mV + */ + phy_param = phy_reg + HW_USBPHY_TX; + __raw_writel(0x1c060605, phy_param); + phy_param = phy_reg + HW_USBPHY_RX; + __raw_writel(0x1, phy_param); + return 0; } /* Notes: configure USB clock*/ |