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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2015-10-09 13:30:08 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-16 23:34:22 -0700 |
| commit | c840d6ce772d47c777070ca4bbbfbf21d8d727a3 (patch) | |
| tree | efdb74b3d0be19abcbc53383b640746cc2d91500 /drivers/usb/host/xhci.h | |
| parent | b1630da0589dbf520e4cf565eda6a74c5a813962 (diff) | |
| download | linux-c840d6ce772d47c777070ca4bbbfbf21d8d727a3.tar.bz2 | |
xhci: create one unified function to calculate TRB TD remainder.
xhci versions 1.0 and later report the untransferred data remaining in a
TD a bit differently than older hosts.
We used to have separate functions for these, and needed to check host
version before calling the right function.
Now Mediatek host has an additional quirk on how it uses the TD Size
field for remaining data. To prevent yet another function for calculating
remainder we instead want to make one quirk friendly unified function.
Tested-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 51093df15938..f24b7d1e255b 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1179,6 +1179,8 @@ enum xhci_setup_dev { /* Normal TRB fields */ /* transfer_len bitmasks - bits 0:16 */ #define TRB_LEN(p) ((p) & 0x1ffff) +/* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31) */ +#define TRB_TD_SIZE(p) (min((p), (u32)31) << 17) /* Interrupter Target - which MSI-X vector to target the completion event at */ #define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22) #define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff) |