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sunxi: musb: Implement dfu_usb_get_reset()

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This is necessary to distinguish between the "dfu-util --detach" and
the "dfu-util --reset" requests.

The default weak implementation of dfu_usb_get_reset() unconditionally
reboots the device, but we want to be able to continue the boot.scr
execution after writing the kernel, fdt and ramdisk to RAM via DFU.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Siarhei Siamashka 2015-10-25 06:44:47 +02:00 committed by Hans de Goede
parent 2a909c5f7a
commit 6047a3a9c9
1 changed files with 12 additions and 0 deletions
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12
drivers/usb/musb-new/sunxi.c
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@ -165,6 +165,17 @@ static void USBC_ConfigFIFO_Base(void)
writel(reg_value, SUNXI_SRAMC_BASE + 0x04);
}
/******************************************************************************
* Needed for the DFU polling magic
******************************************************************************/
static u8 last_int_usb;
bool dfu_usb_get_reset(void)
{
return !!(last_int_usb & MUSB_INTR_RESET);
}
/******************************************************************************
* MUSB Glue code
******************************************************************************/
@ -176,6 +187,7 @@ static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
/* read and flush interrupts */
musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
last_int_usb = musb->int_usb;
if (musb->int_usb)
musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);