diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 10 | ||||
| -rw-r--r-- | drivers/usb/host/ehci.h | 6 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 889c2027e7f..a205a53c61f 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -201,9 +201,15 @@ static void tdi_reset (struct ehci_hcd *ehci) u32 __iomem *reg_ptr; u32 tmp; - reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + 0x68); + reg_ptr = (u32 __iomem *)(((u8 __iomem *)ehci->regs) + USBMODE); tmp = ehci_readl(ehci, reg_ptr); - tmp |= 0x3; + tmp |= USBMODE_CM_HC; + /* The default byte access to MMR space is LE after + * controller reset. Set the required endian mode + * for transfer buffers to match the host microprocessor + */ + if (ehci_big_endian_mmio(ehci)) + tmp |= USBMODE_BE; ehci_writel(ehci, tmp, reg_ptr); } diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 4d617108f55..2c68a04230c 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -302,6 +302,12 @@ struct ehci_regs { #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC) } __attribute__ ((packed)); +#define USBMODE 0x68 /* USB Device mode */ +#define USBMODE_SDIS (1<<3) /* Stream disable */ +#define USBMODE_BE (1<<2) /* BE/LE endianness select */ +#define USBMODE_CM_HC (3<<0) /* host controller mode */ +#define USBMODE_CM_IDLE (0<<0) /* idle state */ + /* Appendix C, Debug port ... intended for use with special "debug devices" * that can help if there's no serial console. (nonstandard enumeration.) */ |