[U-Boot] [PATCH v1] fastboot: add support for reboot-bootloader command

[Rob Herring]

On Tue, Feb 24, 2015 at 5:34 AM, Alexey Firago <alexey_firago at mentor.com> wrote:
> The "fastboot reboot-bootloader" command is defined to
> re-enter into fastboot mode after rebooting into
> bootloader. This command is usually used after updating
> bootloader via fastboot.
>
> This commit implements only a generic side of the
> command - setting of the reset flag and then resetting.
> Setting of the reset flag is implemented using __weak
> fb_set_reboot_flag() function. The actual setting and
> checking of the reset flag should be implemented by
> a boot script and/or board/SoC specific code.
>
> Signed-off-by: Alexey Firago <alexey_firago at mentor.com>
>
> ---
>
>  drivers/usb/gadget/f_fastboot.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
> index 310175a..9d898cc 100644
> --- a/drivers/usb/gadget/f_fastboot.c
> +++ b/drivers/usb/gadget/f_fastboot.c
> @@ -122,6 +122,7 @@ static struct usb_gadget_strings *fastboot_strings[] = {
>  };
>
>  static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
> +static int strcmp_l1(const char *s1, const char *s2);
>
>  static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
>  {
> @@ -317,8 +318,20 @@ static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
>         do_reset(NULL, 0, 0, NULL);
>  }
>
> +int __weak fb_set_reboot_flag(void)
> +{
> +       return 0;

Perhaps the default implementation is not too important, but it does
not cause a reboot into fastboot mode so it should probably return an
error instead.

Rob

> +}
> +
>  static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
>  {
> +       char *cmd = req->buf;
> +       if (!strcmp_l1("reboot-bootloader", cmd)) {
> +               if (fb_set_reboot_flag()) {
> +                       fastboot_tx_write_str("FAILCannot set reboot flag");
> +                       return;
> +               }
> +       }
>         fastboot_func->in_req->complete = compl_do_reset;
>         fastboot_tx_write_str("OKAY");
>  }
> --
> 1.9.1
>
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