diff options
| author | Valentine Barshak <vbarshak@ru.mvista.com> | 2007-10-09 15:00:05 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:55:32 -0700 |
| commit | 4f45426cfd6170311e116442ccd8ce0e31979237 (patch) | |
| tree | d62325f3cf5261230f7d4423603665c9b5adbc01 /drivers/usb/host/ohci-ppc-soc.c | |
| parent | f621b8437d6ae502dde45797f56407e48c7a68b4 (diff) | |
USB: add runtime frame_no quirk for big-endian OHCI
Add OHCI big endian frame_no quirk. The frame_no value stored in the
HCCA is a 16 bit field at a specific offset, but since not all CPUs can
do 16-bit memory accesses it's used as a 32 bit field. And that's why
big-endian OHCI must shift 16 bits ... unless the spec is not followed.
Currently there's one MPC52xx platform that doesn't need the shift. This
patch adds a new "big endian frame_no" quirk to control that at runtime.
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci-ppc-soc.c')
| -rw-r--r-- | drivers/usb/host/ohci-ppc-soc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-ppc-soc.c b/drivers/usb/host/ohci-ppc-soc.c index 1a2e1777ca61..f95be1896b0d 100644 --- a/drivers/usb/host/ohci-ppc-soc.c +++ b/drivers/usb/host/ohci-ppc-soc.c @@ -73,6 +73,11 @@ static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver, ohci = hcd_to_ohci(hcd); ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; + +#ifdef CONFIG_PPC_MPC52xx + /* MPC52xx doesn't need frame_no shift */ + ohci->flags |= OHCI_QUIRK_FRAME_NO; +#endif ohci_hcd_init(ohci); retval = usb_add_hcd(hcd, irq, IRQF_DISABLED); |