[U-Boot] [PATCH RFC 0/2] usb: host: Add a wrapper layer for mutiple host support

[Vivek Gautam <gautam.vivek@samsung.com>]

Hi Marek,

It's been very long since we had discussion for introducing the wrapper layer
to enable using multiple usb controller types.
Its been unfortunate that i had been busy with other tasks, and couldn't
look into this.
Now that i got sometime, i have prepared a simple RFC patch which right now
supports APIs translation for submit_control_msg(), submit_bulk_msg(),
submit_int_msg(), and usb_lowlevel_init() as well as usb_lowlevel_stop().
This was the simplest approach that could differentiate between controller
types.

I had thought of another approach too, wherein there's a 'list' passed by the
usb core layer, which would be filled with 'host_controller_drv' structure, that
would contain information about the driver. And then each host controller driver
will register certain callbacks that can be called from the upper layers.
If you say i will send an RFC for this approach.

Let me know you comments on what you think of current approach.

Thanks
Vivek

Vivek Gautam (2):
  usb: Rename usb_submit_int_msg() API to usb_int_msg()
  RFC: usb: host: Introduce host translational layer

 common/usb.c                  |   12 +++--
 common/usb_kbd.c              |    6 +--
 common/usb_storage.c          |    2 +-
 drivers/usb/host/Makefile     |    2 +
 drivers/usb/host/ehci-hcd.c   |   15 +++---
 drivers/usb/host/host_trans.c |  102 +++++++++++++++++++++++++++++++++++++++++
 drivers/usb/host/host_trans.h |   42 +++++++++++++++++
 drivers/usb/host/xhci.c       |   11 +++--
 include/usb.h                 |   17 ++++---
 9 files changed, 181 insertions(+), 28 deletions(-)
 create mode 100644 drivers/usb/host/host_trans.c
 create mode 100644 drivers/usb/host/host_trans.h

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1.7.10.4