From: b47624 <b47624@ubuntu64bit1204.(none)>
This patchset adds USB OTG HNP and SRP support on chipidea usb driver,
existing OTG port role swtich function by ID pin status kept unchanged,
based on that, if select CONFIG_USB_OTG_FSM, OTG HNP and SRP will be
supported.
Reference to:
"On-The-Go and Embedded Host Supplement to the USB Revision 2.0 Specification July 27, 2012
Revision 2.0 version 1.1a"
How to test HNP&SRP with 2 Freescale i.MX6Q sabre SD boards:
1. Power up 2 Freescale i.MX6Q sabre SD boards with gadget class driver loaded
(e.g. g_mass_storage).
2. Connect 2 boards with usb cable with one end is micro A plug, the other end
is micro B plug.
3. The A device with micro A plug inserted should enumrate B device.
4. Role switch.
On B device:
echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
if HNP polling patchset is not applied, also need:
On A device:
echo 0 > /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req
B device should take host role and enumrate A device(peripheral).
5. A device switch back to host.
On B device:
echo 0 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
A device should switch back to host and enumrate B device.
6. Remove B device and insert again in 10 seconds, A device should
enumrate B device again.
7. Remove B device and insert again after 10 seconds, A device should
NOT enumrate B device.
if A device wants to use bus:
On A device:
echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_req
if B device wants to use bus:
On B device:
echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
8. A device power down the bus.
On A device:
echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/a_bus_drop
9. B device do data pulse for SRP.
On B device:
echo 1 > /sys/bus/platform/devices/ci_hdrc.0/inputs/b_bus_req
A device usb bus should be resumed and enumrate B device.
Changes since v2:
- Add ABI document for sysfs input files description:
Documentation/ABI/testing/sysfs-platform-chipidea-usb-otg
- Add a debug file for show some USB registers value.
- Split host driver change to be 2 patches, one for otg_port number init;
the other one for vbus control change.
- Export interrupt enable and status read functions from udc driver.
- Only enable AVV irq in otg fsm init.
- Remove duplicated USBSTS bits definitions.
- typo correction.
- Add HowTo demo role switch with 2 Freescale i.MX6Q sabre SD boards
in cover letter.
Changes since v1:
- Move out HNP polling patch from this series, which will be a seperated patchset
followed this one
- Change fsm timers global variables to be a structure embeded in ci_hdrc,
to make multiple OTG instances can exist in one system
- Change some otg fsm functions to be static
- Re-split timer init patch to avoid a later patch changing a previous one
in the same series
- Change timer structure memory allocation to be devm_kzalloc
- Update some format alignment and spelling errors
Li Jun (13):
usb: phy-fsm: update OTG HNP state transition conditions according to
OTG and EH 2.0 spec.
usb: chipidea: usb OTG fsm initialization.
usb: chipidea: host: vbus control change for OTG HNP.
usb: chipidea: host: init otg port number.
usb: chipidea: udc: driver update for OTG HNP.
usb: chipidea: export interrupt enable and status register read
functions.
usb: chipidea: add OTG fsm operation functions implemenation.
usb: chipidea: OTG fsm timers initialization.
usb: chipidea: OTG HNP and SRP fsm implementation.
usb: chipidea: add sys inputs for OTG fsm input.
usb: chipidea: debug: add debug file for OTG variables show.
usb: chipidea: debug: add debug file for controller registers dump.
Documentation: ABI: usb: chipidea USB OTG HNP sysfs interface
description.
.../ABI/testing/sysfs-platform-chipidea-usb-otg | 55 ++
drivers/usb/chipidea/Makefile | 1 +
drivers/usb/chipidea/bits.h | 12 +
drivers/usb/chipidea/ci.h | 6 +
drivers/usb/chipidea/core.c | 30 +-
drivers/usb/chipidea/debug.c | 133 +++
drivers/usb/chipidea/host.c | 13 +-
drivers/usb/chipidea/host.h | 9 +
drivers/usb/chipidea/otg.c | 17 +-
drivers/usb/chipidea/otg_fsm.c | 872 ++++++++++++++++++++
drivers/usb/chipidea/otg_fsm.h | 141 ++++
drivers/usb/chipidea/udc.c | 31 +-
drivers/usb/phy/phy-fsm-usb.c | 9 +-
13 files changed, 1297 insertions(+), 32 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-platform-chipidea-usb-otg
create mode 100644 drivers/usb/chipidea/otg_fsm.c
create mode 100644 drivers/usb/chipidea/otg_fsm.h
--
1.7.9.5
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