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Date: Sun, 30 Sep 2012 16:14:41 +0400
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From: Antony Pavlov <antonynpavlov@gmail.com>
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Subject: Re: [PATCH 6/9] omap4: add usb boot support
To: vj <vicencb@gmail.com>
Cc: barebox@lists.infradead.org

On 30 September 2012 06:50, vj <vicencb@gmail.com> wrote:
> ---
>  arch/arm/cpu/cpu.c                              |   1 +
>  arch/arm/mach-omap/Kconfig                      |   7 +
>  arch/arm/mach-omap/Makefile                     |   1 +
>  arch/arm/mach-omap/include/mach/omap4_rom_usb.h | 142 ++++++++
>  arch/arm/mach-omap/omap4_generic.c              |  13 +
>  arch/arm/mach-omap/omap4_rom_usb.c              | 186 +++++++++++
>  scripts/.gitignore                              |   1 +
>  scripts/Makefile                                |   4 +
>  scripts/omap4_usbboot.c                         | 416 ++++++++++++++++++++++++
>  scripts/usb.h                                   |  61 ++++
>  scripts/usb_linux.c                             | 397 ++++++++++++++++++++++
>  11 files changed, 1229 insertions(+)
>  create mode 100644 arch/arm/mach-omap/include/mach/omap4_rom_usb.h
>  create mode 100644 arch/arm/mach-omap/omap4_rom_usb.c
>  create mode 100644 scripts/omap4_usbboot.c
>  create mode 100644 scripts/usb.h
>  create mode 100644 scripts/usb_linux.c
>
> diff --git a/arch/arm/cpu/cpu.c b/arch/arm/cpu/cpu.c
> index 71ef8c0..05343de 100644
> --- a/arch/arm/cpu/cpu.c
> +++ b/arch/arm/cpu/cpu.c
> @@ -89,6 +89,7 @@ void arch_shutdown(void)
>                 : "r0", "r1", "r2", "r3", "r6", "r10", "r12", "lr", "cc", "memory"
>         );
>  #endif
> +       __asm__ __volatile__ ("cpsid i\n");
>  }
>
>  #ifdef CONFIG_THUMB2_BAREBOX
> diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
> index d735284..16583cb 100644
> --- a/arch/arm/mach-omap/Kconfig
> +++ b/arch/arm/mach-omap/Kconfig
> @@ -96,6 +96,13 @@ config ARCH_TEXT_BASE
>         default 0x80e80000 if MACH_OMAP343xSDP
>         default 0x80e80000 if MACH_BEAGLE
>
> +config OMAP4_USBBOOT
> +       bool "enable booting from USB"
> +       default n
> +       depends on ARCH_OMAP4 && !MMU
> +       help
> +         Enable this to enable USB booting
> +

Can we add more detailed description here? E.g.:

Say Y here if you want to be able to boot <name of the chip family
here> from USB.
You need an utility program called <name of the program here> to boot
from USB. Please read <file name or URL here> for more information.

-- 
Best regards,
  Antony Pavlov

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