diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2016-11-21 08:59:23 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-21 17:35:36 +0100 |
| commit | 454f83d5e60110a18f24ffc0d58d2252d09c9a92 (patch) | |
| tree | 7a2bf961047f1666872fc7f9ce718fb99802f19b /drivers/usb/musb/musb_core.c | |
| parent | d24b63abf4bc866ead04660b5265af77ac910abb (diff) | |
musb: sunxi: Force session end on babble errors in host-mode
The sunxi musb has a bug where sometimes it will generate a babble
error on device disconnect instead of a disconnect irq. When this
happens the musb-controller switches from host mode to device mode
(it clears MUSB_DEVCTL_SESSION and sets MUSB_DEVCTL_BDEVICE) and
gets stuck in this state.
Clearing this requires reporting Vbus low for 200 or more ms, but
on some devices Vbus is simply always high (host-only mode, no Vbus
control).
This commit adds a sunxi_musb_recover() callback which makes
sunxi_musb_work call phy_set_mode with the current mode, which
will force end the current session.
This fixes the musb controller getting stuck in this state on systems
without Vbus control; and also fixes the need to unplug the usb-b ->
usb-a cable to get out of this state on systems with Vbus control.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb/musb_core.c')
0 files changed, 0 insertions, 0 deletions