diff options
| -rw-r--r-- | arch/arm/mach-shmobile/setup-r8a7779.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/setup-r8a7779.c b/arch/arm/mach-shmobile/setup-r8a7779.c index 533d7fd..a3d0e55 100644 --- a/arch/arm/mach-shmobile/setup-r8a7779.c +++ b/arch/arm/mach-shmobile/setup-r8a7779.c @@ -33,6 +33,7 @@ #include <linux/sh_timer.h> #include <linux/dma-mapping.h> #include <linux/usb/otg.h> +#include <linux/usb/hcd.h> #include <linux/usb/ehci_pdriver.h> #include <linux/usb/ohci_pdriver.h> #include <linux/pm_runtime.h> @@ -435,10 +436,25 @@ static void usb_power_off(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); } +static int ehci_init_internal_buffer(struct usb_hcd *hcd) +{ + /* + * Below are recommended values from the datasheet; + * see [USB :: Setting of EHCI Internal Buffer]. + */ + /* EHCI IP internal buffer setting */ + iowrite32(0x00ff0040, hcd->regs + 0x0094); + /* EHCI IP internal buffer enable */ + iowrite32(0x00000001, hcd->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, + .pre_setup = ehci_init_internal_buffer, }; static struct resource ehci0_resources[] = { |