diff options
| author | Sriram Dash <sriram.dash@nxp.com> | 2016-09-23 12:57:52 +0530 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2016-09-27 23:30:49 +0200 |
| commit | 4c043712e9910ef1d612aedbd8304a1f7348ef5f (patch) | |
| tree | 555b48572b27ad36a9585b6078aa33cc16b0dde1 /drivers/usb/host | |
| parent | c609775e6fe6ce70d8ad3e244440b42fbf66bc13 (diff) | |
drivers: usb: xhci-fsl: Implement Erratum A-010151 for FSL USB3 controller
Currently the controller by default enables the Receive Detect feature in P3
mode in USB 3.0 PHY. However, USB 3.0 PHY does not reliably support receive
detection in P3 mode.
Enabling the USB3 controller to configure USB in P2 mode whenever the Receive
Detect feature is required.
Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-fsl.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-fsl.c b/drivers/usb/host/xhci-fsl.c index 2529d0eb13..798c358fd9 100644 --- a/drivers/usb/host/xhci-fsl.c +++ b/drivers/usb/host/xhci-fsl.c @@ -84,6 +84,19 @@ static int fsl_xhci_core_init(struct fsl_xhci *fsl_xhci) /* Change beat burst and outstanding pipelined transfers requests */ fsl_xhci_set_beat_burst_length(fsl_xhci->dwc3_reg); + /* + * A-010151: The dwc3 phy TSMC 28-nm HPM 0.9/1.8 V does not + * reliably support Rx Detect in P3 mode(P3 is the default + * setting). Therefore, some USB3.0 devices may not be detected + * reliably in Super Speed mode. So, USB controller to configure + * USB in P2 mode whenever the Receive Detect feature is required. + * whenever the Receive Detect feature is required. + */ + if (has_erratum_a010151()) + clrsetbits_le32(&fsl_xhci->dwc3_reg->g_usb3pipectl[0], + DWC3_GUSB3PIPECTL_DISRXDETP3, + DWC3_GUSB3PIPECTL_DISRXDETP3); + return ret; } |