diff options
| author | Chen Yu <chenyu56@huawei.com> | 2017-01-23 15:00:18 -0800 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-01-24 16:19:10 +0200 |
| commit | ca8b03324877e1804161fd4e0100d49f03ad9fce (patch) | |
| tree | f57e0fc6d2cf479f94d4fad75b017f9cc1d0d537 /drivers/usb/dwc2/core.h | |
| parent | 9156a7ef1c3ba482f85f2733edcde2b10189de8c (diff) | |
| download | linux-rt-ca8b03324877e1804161fd4e0100d49f03ad9fce.tar.gz | |
usb: dwc2: Add a quirk to allow speed negotiation for Hisilicon Hi6220
The Hi6220's usb controller is limited in that it does not
support "Split Transactions", so it does not support communicating
with low-speed and full-speed devices behind a high-speed hub.
Thus it requires a quirk so that we can manually drop the usb
speed when low/full-speed are attached, and bump back to high
speed when they are removed.
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Chen Yu <chenyu56@huawei.com>
[jstultz: Reworked to simplify the patch, and made
commit log to be more specific about the issue]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/core.h')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index b07bf7be2034..a473853ca39c 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -444,6 +444,11 @@ enum dwc2_ep0_state { * in DWORDS with possible values from from * 16-32768 (default: 256, 256, 256, 256, 768, * 768, 768, 768, 0, 0, 0, 0, 0, 0, 0). + * @change_speed_quirk: Change speed configuration to DWC2_SPEED_PARAM_FULL + * while full&low speed device connect. And change speed + * back to DWC2_SPEED_PARAM_HIGH while device is gone. + * 0 - No (default) + * 1 - Yes * * The following parameters may be specified when starting the module. These * parameters define how the DWC_otg controller should be configured. A @@ -501,6 +506,8 @@ struct dwc2_core_params { u32 g_rx_fifo_size; u32 g_np_tx_fifo_size; u32 g_tx_fifo_size[MAX_EPS_CHANNELS]; + + bool change_speed_quirk; }; /** |