From: Ravi Babu <ravibabu@ti.com>
To: <linux-usb@vger.kernel.org>
Cc: <balbi@ti.com>, <linux-kernel@vger.kernel.org>,
Ravi Babu <ravibabu@ti.com>
Subject: [PATCH v1 0/3] babble error workaround for am335x platform
Date: Wed, 29 May 2013 18:37:01 +0530 [thread overview]
Message-ID: <1369832824-29071-1-git-send-email-ravibabu@ti.com> (raw)
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(-)
next reply other threads:[~2013-05-29 13:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 13:07 Ravi Babu [this message]
2013-05-29 13:07 ` [PATCH v1 1/3] usb: musb: core: added musb_restart() API to handle babble condition Ravi Babu
2013-06-26 8:24 ` Felipe Balbi
2013-05-29 13:07 ` [PATCH v1 2/3] usb: musb: core: added babble recovery func-ptr to musb->ops Ravi Babu
2013-06-26 8:26 ` Felipe Balbi
2013-06-26 8:37 ` B, Ravi
2013-06-26 8:53 ` Felipe Balbi
2013-06-26 9:08 ` B, Ravi
2013-05-29 13:07 ` [PATCH v1 3/3] usb: musb: dsps: handle babble condition for dsps platform Ravi Babu
2013-06-26 8:29 ` Felipe Balbi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1369832824-29071-1-git-send-email-ravibabu@ti.com \
--to=ravibabu@ti.com \
--cc=balbi@ti.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.