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| author |   Tal Shorer <tal.shorer@gmail.com> | 2016-11-18 14:17:26 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-12-05 16:37:10 +0100 |
| commit | b9c2a2a39898d55b9fe13aa1fe15891e37bc9087 (patch) | |
| tree | 783ed0c5079b080e8e369bebeaad36a17ee4952b /tools/usb | |
| parent | USB: OHCI: ohci-pxa27x: remove useless functions (diff) | |
| download | wireguard-linux-b9c2a2a39898d55b9fe13aa1fe15891e37bc9087.tar.xz wireguard-linux-b9c2a2a39898d55b9fe13aa1fe15891e37bc9087.zip | |
usb: hcd.h: construct hub class request constants from simpler constants
Currently, each hub class request constant is defined by a line like:
#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
The "magic" number for the high byte is one of 0x20, 0xa0, 0x23, 0xa3.
The 0x80 bit that changes inditace USB_DIR_IN, and the 0x03 that
pops up is the difference between USB_RECIP_DEVICE (0x00) and
USB_RECIP_OTHER (0x03). The constant 0x20 bit is USB_TYPE_CLASS.
This patch eliminates those magic numbers by defining a macro to help
construct these hub class request from simpler constants.
Note that USB_RT_HUB is defined as (USB_TYPE_CLASS | USB_RECIP_DEVICE)
and that USB_RT_PORT is defined as (USB_TYPE_CLASS | USB_RECIP_OTHER).
Signed-off-by: Tal Shorer <tal.shorer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/usb')
0 files changed, 0 insertions, 0 deletions