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| author | Thomas Pugliese <thomas.pugliese@gmail.com> | 2014-03-06 12:53:37 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-07 12:52:04 -0800 |
| commit | 86e2864d7e9d429b94624a28ba3f05fc2db89051 (patch) | |
| tree | 9fc5d8fb13a0c3e7ce84af669e6f7114f76d4d4d /drivers/usb/wusbcore/wa-hc.h | |
| parent | 5090ecea133325f762704f00963bca1b024ee691 (diff) | |
| download | talos-op-linux-86e2864d7e9d429b94624a28ba3f05fc2db89051.tar.gz talos-op-linux-86e2864d7e9d429b94624a28ba3f05fc2db89051.zip | |
usb: wusbcore: disable transfer notifications for Alereon HWAs
The HWA driver does not do anything with transfer notifications after
receiving the first one and the Alereon HWA allows them to be disabled
as a performance optimization. This patch sends a vendor specific
command to the Alereon HWA on startup to disable transfer notifications.
If the command is successful, the DTI system is started immediately
since that would normally be started upon the first reception of a
transfer notification which will no longer be sent.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/wusbcore/wa-hc.h')
| -rw-r--r-- | drivers/usb/wusbcore/wa-hc.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wa-hc.h b/drivers/usb/wusbcore/wa-hc.h index a2ef84b8397e..7510960588dc 100644 --- a/drivers/usb/wusbcore/wa-hc.h +++ b/drivers/usb/wusbcore/wa-hc.h @@ -134,8 +134,18 @@ enum wa_quirks { * requests to be concatenated and not sent as separate packets. */ WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC = 0x01, + /* + * The Alereon HWA can be instructed to not send transfer notifications + * as an optimization. + */ + WUSB_QUIRK_ALEREON_HWA_DISABLE_XFER_NOTIFICATIONS = 0x02, }; +enum wa_vendor_specific_requests { + WA_REQ_ALEREON_DISABLE_XFER_NOTIFICATIONS = 0x4C, + WA_REQ_ALEREON_FEATURE_SET = 0x01, + WA_REQ_ALEREON_FEATURE_CLEAR = 0x00, +}; /** * Instance of a HWA Host Controller * @@ -234,6 +244,7 @@ struct wahc { extern int wa_create(struct wahc *wa, struct usb_interface *iface, kernel_ulong_t); extern void __wa_destroy(struct wahc *wa); +extern int wa_dti_start(struct wahc *wa); void wa_reset_all(struct wahc *wa); |
