aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/ehci-hcd.c10
-rw-r--r--drivers/usb/host/ehci.h6
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.)
*/