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.h | |
| 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.h')
| -rw-r--r-- | drivers/usb/host/ehci.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index e9ba8e252489..d0792f591590 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -128,6 +128,7 @@ struct ehci_hcd { /* one per controller */ unsigned has_fsl_port_bug:1; /* FreeScale */ unsigned big_endian_mmio:1; unsigned big_endian_desc:1; + unsigned big_endian_capbase:1; unsigned has_amcc_usb23:1; unsigned need_io_watchdog:1; unsigned broken_periodic:1; @@ -605,12 +606,18 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc) * This attempts to support either format at compile time without a * runtime penalty, or both formats with the additional overhead * of checking a flag bit. + * + * ehci_big_endian_capbase is a special quirk for controllers that + * implement the HC capability registers as separate registers and not + * as fields of a 32-bit register. */ #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO #define ehci_big_endian_mmio(e) ((e)->big_endian_mmio) +#define ehci_big_endian_capbase(e) ((e)->big_endian_capbase) #else #define ehci_big_endian_mmio(e) 0 +#define ehci_big_endian_capbase(e) 0 #endif /* |