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ARM: shmobile: r8a7779: setup EHCI internal buffer 

Setup the EHCI internal buffer (before EHCI driver has a chance to touch the
registers) using the pre_setup() method in 'struct usb_ehci_pdata'.

The patch has been tested on the Marzen board.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Sergei Shtylyov 2013-06-02 01:37:01 +04:00 committed by Simon Horman
parent 743fcce0a8
commit 84a812da09
1 changed files with 16 additions and 0 deletions
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16
arch/arm/mach-shmobile/setup-r8a7779.c
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@ -33,6 +33,7 @@
#include <linux/sh_timer.h> #include <linux/sh_timer.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/usb/otg.h> #include <linux/usb/otg.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ehci_pdriver.h> #include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h> #include <linux/usb/ohci_pdriver.h>
#include <linux/pm_runtime.h> #include <linux/pm_runtime.h>
@ -435,10 +436,25 @@ static void usb_power_off(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev); 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 = { static struct usb_ehci_pdata ehcix_pdata = {
.power_on = usb_power_on, .power_on = usb_power_on,
.power_off = usb_power_off, .power_off = usb_power_off,
.power_suspend = usb_power_off, .power_suspend = usb_power_off,
.pre_setup = ehci_init_internal_buffer,
}; };
static struct resource ehci0_resources[] = { static struct resource ehci0_resources[] = {