[U-Boot] [RFC PATCH v2 0/6] Port of MUSB driver from Linux

[Ilya Yanok]

Current MUSB driver in U-Boot uses old UDC API while new gagdet
client drivers need new gadget API. Also current MUSB driver has
some significant limitations (like inability to handle tx for
endpoints other than ep0). So I think port of new Linux driver is
desirable.

This is initial port, performed mostly by putting DM and OTG
code under #ifndef __UBOOT__ clauses. My intention was to be as
close as possible to the original to ease of possible resyncs.
Some warnings are suppressed via CFLAGS. There are some style
problems but I'm not touching them for now for the above mentioned
reason. There is obviously some room for optimisation, some
structure fields are unused as well as (probably) some code.

This is not a replacement for existing MUSB driver (at least for
now), cause there are still consumers of the old interface and
the only ported backend is for TI AM335X (while the old code
has a bunch of other backends).

OTG and DMA are not supported. The only ported driver
is for TI AM33xx, but others should be easy to port too.

Virtual root hub is not implemented but this shouldn't be
a big problem as the old code has virtual root hub support
enabled only for Blackfin platform.

Tested it on AM335x EVM and BeagleBone with CDC Ethernet gadget
and a bunch of storage devices.

Pathes are rather big because of the original code size (and I didn't
delete unused code, just disabled it). So it's probably better to
look at changes as compared to Linux code. I prepared such version
also, you can find it at [1]. Hopefully it will be also useful
if resync with the kernel will be needed in future.

[1] https://github.com/yanok/u-boot/tree/musb-changes-from-linux


Changes in v2:
 - add missing linux-compat.h header
 - added host support
 - glue code moved from musb_gadget_uboot.c to musb_uboot.c and
   cleaned up slightly.
 - added check for malloc return value
 - define is_{host,peripheral}_capable conditionally to support
   compilation with only host or gadget enabled
 - added some more is_{host,peripheral}_capable guards to core
   code to support compilation with only host or gadget enabled
 - rename backend config option to CONFIG_USB_MUSB_DSPS
 - we are providing host support now so add yourself to usb.h
 - init both musb IPs (conditionally) from arch_init not
   from eth_initialize
 - host support enabled
 - define CONFIG_ARCH_INIT as now musb_register() is called
   from arch_init()
 - use new config options

Ilya Yanok (6):
  linux/usb/ch9.h: update with the version from Linux tree
  usb: use linux/usb/ch9.h instead of usbdescriptors.h
  musb-new: port of Linux musb driver
  musb-new: dsps backend driver
  am33xx: init OTG hardware and new musb gadget driver
  am335x_evm: enable both musb gadget and host

 Makefile                                      |    1 +
 arch/arm/cpu/arm920t/s3c24x0/usb_ohci.c       |    2 +-
 arch/arm/cpu/armv7/am33xx/board.c             |  107 +-
 arch/arm/cpu/armv7/am33xx/clock.c             |    8 +
 arch/arm/include/asm/arch-am33xx/cpu.h        |   11 +-
 arch/arm/include/asm/arch-am33xx/hardware.h   |    4 +
 arch/arm/include/asm/omap_musb.h              |   25 +
 arch/mips/cpu/mips32/au1x00/au1x00_usb_ohci.c |    2 +-
 arch/powerpc/cpu/mpc5xxx/usb_ohci.c           |    2 +-
 arch/powerpc/cpu/ppc4xx/usb_ohci.c            |    2 +-
 common/cmd_usb.c                              |    2 +-
 common/usb.c                                  |    4 +-
 drivers/usb/gadget/config.c                   |    1 -
 drivers/usb/gadget/epautoconf.c               |    1 -
 drivers/usb/gadget/ether.c                    |    1 -
 drivers/usb/gadget/gadget_chips.h             |    2 +
 drivers/usb/gadget/s3c_udc_otg.c              |    1 -
 drivers/usb/gadget/usbstring.c                |    1 -
 drivers/usb/host/ehci-hcd.c                   |   16 +-
 drivers/usb/host/isp116x-hcd.c                |    2 +-
 drivers/usb/host/ohci-hcd.c                   |    2 +-
 drivers/usb/host/sl811-hcd.c                  |    2 +-
 drivers/usb/musb-new/Makefile                 |   37 +
 drivers/usb/musb-new/linux-compat.h           |  109 ++
 drivers/usb/musb-new/musb_core.c              | 2497 +++++++++++++++++++++++++
 drivers/usb/musb-new/musb_core.h              |  623 ++++++
 drivers/usb/musb-new/musb_debug.h             |   58 +
 drivers/usb/musb-new/musb_dma.h               |  186 ++
 drivers/usb/musb-new/musb_dsps.c              |  771 ++++++++
 drivers/usb/musb-new/musb_gadget.c            | 2333 +++++++++++++++++++++++
 drivers/usb/musb-new/musb_gadget.h            |  130 ++
 drivers/usb/musb-new/musb_gadget_ep0.c        | 1089 +++++++++++
 drivers/usb/musb-new/musb_host.c              | 2400 ++++++++++++++++++++++++
 drivers/usb/musb-new/musb_host.h              |  114 ++
 drivers/usb/musb-new/musb_io.h                |  146 ++
 drivers/usb/musb-new/musb_regs.h              |  645 +++++++
 drivers/usb/musb-new/musb_uboot.c             |  237 +++
 drivers/usb/musb-new/usb-compat.h             |   88 +
 drivers/usb/musb/musb_hcd.c                   |    4 +-
 include/configs/am335x_evm.h                  |   27 +
 include/linux/usb/ch9.h                       |  514 ++++-
 include/linux/usb/musb.h                      |  162 ++
 include/usb.h                                 |   18 +-
 include/usb/s3c_udc.h                         |    1 -
 include/usb_defs.h                            |    6 -
 45 files changed, 12336 insertions(+), 58 deletions(-)
 create mode 100644 arch/arm/include/asm/omap_musb.h
 create mode 100644 drivers/usb/musb-new/Makefile
 create mode 100644 drivers/usb/musb-new/linux-compat.h
 create mode 100644 drivers/usb/musb-new/musb_core.c
 create mode 100644 drivers/usb/musb-new/musb_core.h
 create mode 100644 drivers/usb/musb-new/musb_debug.h
 create mode 100644 drivers/usb/musb-new/musb_dma.h
 create mode 100644 drivers/usb/musb-new/musb_dsps.c
 create mode 100644 drivers/usb/musb-new/musb_gadget.c
 create mode 100644 drivers/usb/musb-new/musb_gadget.h
 create mode 100644 drivers/usb/musb-new/musb_gadget_ep0.c
 create mode 100644 drivers/usb/musb-new/musb_host.c
 create mode 100644 drivers/usb/musb-new/musb_host.h
 create mode 100644 drivers/usb/musb-new/musb_io.h
 create mode 100644 drivers/usb/musb-new/musb_regs.h
 create mode 100644 drivers/usb/musb-new/musb_uboot.c
 create mode 100644 drivers/usb/musb-new/usb-compat.h
 create mode 100644 include/linux/usb/musb.h

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1.7.9.5