Setup the EHCI internal buffer (before EHCI driver has a chance to touch the
registers) using the init() method in 'struct usb_ehci_pdata'.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-shmobile/setup-r8a7779.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
Index: renesas/arch/arm/mach-shmobile/setup-r8a7779.c
===================================================================
--- renesas.orig/arch/arm/mach-shmobile/setup-r8a7779.c
+++ renesas/arch/arm/mach-shmobile/setup-r8a7779.c
@@ -445,10 +445,26 @@ static void usb_power_off(struct platfor
pm_runtime_disable(&pdev->dev);
}
+static int ehci_init_internal_buffer(struct platform_device *pdev,
+ void __iomem *regs)
+{
+ /*
+ * Below are recommended values from the datasheet;
+ * see [USB :: Setting of EHCI Internal Buffer].
+ */
+ /* EHCI IP internal buffer setting */
+ iowrite32(0x00ff0040, regs + 0x0094);
+ /* EHCI IP internal buffer enable */
+ iowrite32(0x00000001, regs + 0x009C);
+
+ return 0;
+}
+
static struct usb_ehci_pdata ehcix_pdata = {
.power_on = usb_power_on,
.power_off = usb_power_off,
.power_suspend = usb_power_off,
+ .init = ehci_init_internal_buffer,
};
static struct resource ehci0_resources[] = {
--
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