diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index fca7abef294..2083ec0e81a 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009 NVIDIA Corporation + * Copyright (c) 2009-2012 NVIDIA Corporation * * See file CREDITS for list of people who contributed to this * project. @@ -28,6 +28,28 @@ #include <asm/errno.h> #include <asm/arch/usb.h> +#if !defined(CONFIG_TEGRA3) +#define TEGRA_USB1_BASE 0xC5000000 +#else +#define TEGRA_USB1_BASE 0x7D000000 +#endif + +/* + * A known hardware issue where Connect Status Change bit of PORTSC register + * of USB1 controller will be set after Port Reset. + * We have to clear it in order for later device enumeration to proceed. + * This ehci_powerup_fixup overrides the weak function ehci_powerup_fixup + * in "ehci-hcd.c". + */ +void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) +{ + wait_ms(50); + if (((u32) status_reg & TEGRA_USB_ADDR_MASK) != TEGRA_USB1_BASE) + return; + /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ + if (ehci_readl(status_reg) & EHCI_PS_CSC) + *reg |= EHCI_PS_CSC; +} /* * Create the appropriate control structures to manage |