Re: [PATCH] usb: dwc2: gadget: On USB RESET reset device address to zero

[John Youn]

On 07/11/2017 03:25 AM, Minas Harutyunyan wrote:
> Reseted DEVADDR field in DCFG to zero on USB RESET.
>
> Device address in DCFG register does not reset to zero,
> which required to pass enumeration, after disconnect and
> reconnect.
>
> Signed-off-by: Minas Harutyunyan 
> ---
>  drivers/usb/dwc2/gadget.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
> index 98a4a79e7f6e..c5c0a26a4d66 100644
> --- a/drivers/usb/dwc2/gadget.c
> +++ b/drivers/usb/dwc2/gadget.c
> @@ -3561,6 +3561,9 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
>   /* Report disconnection if it is not already done. */
>   dwc2_hsotg_disconnect(hsotg);
>
> + /* Reset device address to zero */
> + __bic32(hsotg->regs + DCFG, DCFG_DEVADDR_MASK);
> +
>   if (usb_status & GOTGCTL_BSESVLD && connected)
>   dwc2_hsotg_core_init_disconnected(hsotg, true);
>   }
>

Acked-by: John Youn 


John

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[PATCH] usb: dwc2: gadget: On USB RESET reset device address to zero

[Minas Harutyunyan]

Reseted DEVADDR field in DCFG to zero on USB RESET.

Device address in DCFG register does not reset to zero,
which required to pass enumeration, after disconnect and
reconnect.

Signed-off-by: Minas Harutyunyan 
---
 drivers/usb/dwc2/gadget.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 98a4a79e7f6e..c5c0a26a4d66 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3561,6 +3561,9 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
/* Report disconnection if it is not already done. */
dwc2_hsotg_disconnect(hsotg);
 
+   /* Reset device address to zero */
+   __bic32(hsotg->regs + DCFG, DCFG_DEVADDR_MASK);
+
if (usb_status & GOTGCTL_BSESVLD && connected)
dwc2_hsotg_core_init_disconnected(hsotg, true);
}
-- 
2.11.0

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html