diff options
| author | Jan Andersson <jan@gaisler.com> | 2011-05-03 20:11:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-03 11:43:21 -0700 |
| commit | c430131a02d677aa708f56342c1565edfdacb3c0 (patch) | |
| tree | 15e9930a2512e4b05b7cfd4684f36dd26b0b990f /drivers/usb/host/ehci-ath79.c | |
| parent | 2ce2c3ac8852cfc8f74f4b7b9a2c4cdff007f96a (diff) | |
USB: EHCI: Support controllers with big endian capability regs
The two first HC capability registers (CAPLENGTH and HCIVERSION)
are defined as one 8-bit and one 16-bit register. Most HC
implementations have selected to treat these registers as part
of a 32-bit register, giving the same layout for both big and
small endian systems.
This patch adds a new quirk, big_endian_capbase, to support
controllers with big endian register interfaces that treat
HCIVERSION and CAPLENGTH as individual registers.
Signed-off-by: Jan Andersson <jan@gaisler.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-ath79.c')
| -rw-r--r-- | drivers/usb/host/ehci-ath79.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/host/ehci-ath79.c b/drivers/usb/host/ehci-ath79.c index 7ea23b50f5d8..98cc8a13169c 100644 --- a/drivers/usb/host/ehci-ath79.c +++ b/drivers/usb/host/ehci-ath79.c @@ -44,6 +44,7 @@ static int ehci_ath79_init(struct usb_hcd *hcd) struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct platform_device *pdev = to_platform_device(hcd->self.controller); const struct platform_device_id *id; + int hclength; int ret; id = platform_get_device_id(pdev); @@ -52,21 +53,20 @@ static int ehci_ath79_init(struct usb_hcd *hcd) return -EINVAL; } + hclength = HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); switch (id->driver_data) { case EHCI_ATH79_IP_V1: ehci->has_synopsys_hc_bug = 1; ehci->caps = hcd->regs; - ehci->regs = hcd->regs + - HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); + ehci->regs = hcd->regs + hclength; break; case EHCI_ATH79_IP_V2: hcd->has_tt = 1; ehci->caps = hcd->regs + 0x100; - ehci->regs = hcd->regs + 0x100 + - HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); + ehci->regs = hcd->regs + 0x100 + hclength; break; default: |