linux-kernel - [PATCH v5 0/6] Add support for SW babble Control

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Date:	Thu, 22 May 2014 11:59:35 +0530
From:	George Cherian <george.cherian@...com>
To:	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
CC:	<gregkh@...uxfoundation.org>, <balbi@...com>, <zonque@...il.com>,
	<b-liu@...com>, George Cherian <george.cherian@...com>
Subject: [PATCH v5 0/6] Add support for SW babble Control

Series add support for SW babble control logic found in 
new silicon versions of AM335x. Runtime differentiation of
silicon version is done by checking the BABBLE_CTL register.
For newer silicon the register default value read is 0x4 and
for older versions its 0x0.

Patch 1 -> Handle Babble only if MUSB is in HOST mode
Patch 2 -> Convert recover work to delayed work.
Patch 3 -> usb_phy_vbus_(off/_on) are NOPs for am335x PHY
	   so use usb_phy(_shutdown/_init) in musb_platform_reset()
Patch 4 -> Add return value for musb_platform_reset() in prepration
	   to support SW babble_ctrl
Patch 5 -> Add the sw_babble_control()
Patch 6 -> Enable sw babble control for newer silicon

v4 -> v5 : Added a debug print before resetting MUSB.
	   changed a musb_readb to dsps_readb introduced in Patch#5 of v4.

v3 -> v4 : Fixes an issue in gagdet mode - BUS RESET should not
	   be handled as a BABBLE. Added a check for the same.(Patch #1)
	   Enable sw babble control properly (Patch #6)
	   	
v2 -> v3 : Modify musb_platform_reset() to return zero on success.

George Cherian (6):
  usb: musb: core: Handle Babble condition only in HOST mode
  usb: musb: core: Convert babble recover work to delayed work
  usb: musb: dsps: Call usb_phy(_shutdown/_init) during
    musb_platform_reset()
  usb: musb: core: Convert the musb_platform_reset to have a return
    value.
  usb: musb: dsps: Add the sw_babble_control()
  usb: musb: dsps: Enable sw babble control for newer silicon

 drivers/usb/musb/musb_core.c | 27 ++++++++------
 drivers/usb/musb/musb_core.h | 12 +++---
 drivers/usb/musb/musb_dsps.c | 87 ++++++++++++++++++++++++++++++++++++++++++--
 drivers/usb/musb/musb_regs.h |  7 ++++
 4 files changed, 113 insertions(+), 20 deletions(-)

-- 
1.8.3.1

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