During the babble condition on usb bus, the musb controller removes the session and stops host mode functionality. All the devices connected to root port will be disconnected due to this babble event. As part of recovery of babble bus condition, restarting the controller is needed as all devices got disconnected. Just setting the session bit would not be sufficient as the configured endpoint fifo register getting changed during this condition as confirmed by HW/IP owner of musb controller. This patch set series adds the support to handle the babble error recovery mechanism, this can be extended to other musb platforms. This patch has been verified on tree [1] and tested on am335x platforms. [1] git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git Ravi Babu (3): usb: musb: core: added musb_restart() API to handle babble condition usb: musb: core: added babble recovery func-ptr to musb->ops usb: musb: dsps: handle babble condition for dsps platform drivers/usb/musb/musb_core.c | 30 ++++++++++++++++++++++++++++++ drivers/usb/musb/musb_core.h | 8 ++++++++ drivers/usb/musb/musb_dsps.c | 34 +++++++++++++++++++++++++++++++++- 3 files changed, 71 insertions(+), 1 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
