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@@ -33,6 +33,7 @@
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#include <linux/sh_timer.h>
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#include <linux/dma-mapping.h>
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#include <linux/usb/otg.h>
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+#include <linux/usb/hcd.h>
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#include <linux/usb/ehci_pdriver.h>
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#include <linux/usb/ohci_pdriver.h>
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#include <linux/pm_runtime.h>
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@@ -435,10 +436,25 @@ static void usb_power_off(struct platform_device *pdev)
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pm_runtime_disable(&pdev->dev);
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}
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+static int ehci_init_internal_buffer(struct usb_hcd *hcd)
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+{
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+ /*
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+ * Below are recommended values from the datasheet;
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+ * see [USB :: Setting of EHCI Internal Buffer].
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+ */
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+ /* EHCI IP internal buffer setting */
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+ iowrite32(0x00ff0040, hcd->regs + 0x0094);
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+ /* EHCI IP internal buffer enable */
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+ iowrite32(0x00000001, hcd->regs + 0x009C);
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+
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+ return 0;
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+}
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+
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static struct usb_ehci_pdata ehcix_pdata = {
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.power_on = usb_power_on,
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.power_off = usb_power_off,
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.power_suspend = usb_power_off,
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+ .pre_setup = ehci_init_internal_buffer,
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};
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static struct resource ehci0_resources[] = {
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