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| author | Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> | 2013-06-01 21:37:01 (GMT) |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-06-11 07:10:46 (GMT) |
| commit | 84a812da09887a473f596a107096e8e1671505c9 (patch) | |
| tree | 9d631b0e92508c73395fc26c399d9f8f1de3fa7d /arch | |
| parent | 743fcce0a89e04dc511b4ea40eba8e3f7cec92d4 (diff) | |
| download | linux-84a812da09887a473f596a107096e8e1671505c9.tar.xz | |
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>
Diffstat (limited to 'arch')
| -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[] = { |