On Thu, Aug 15, 2013 at 05:21:51PM +0200, Sebastian Andrzej Siewior wrote: > This is what I observe: > On the first connect, the musb starts with DEVCTL.Session set. On > disconnect, musb_core calls try_idle. That functions removes the Session > bit signalizing that the session is over (something that only in OTG is > required). A new device, that is plugged, is no longer recognized. > I've setup a timer and checked the DEVCTL register and I haven't seen a > change in VBus and I saw the B-Device bit set. After setting the IDDIG > into A mode and forcing the device to behave like a A device, I didn't > see a change. > Neither VBUS goes to 0b11 nor does a session start request comes. > In the TI-v3.2 kernel they skip to call musb_platform_try_idle() in the > OTG_STATE_A_WAIT_BCON state while not in OTG mode. > Since the second port hast a standard A plug the patch changes the port > to run in host mode only and skips the timer which would remove > DEVCTL.Session so we can reconnect to another device later. > > Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
Acked-by: Felipe Balbi <ba...@ti.com>
> ---
> arch/arm/boot/dts/am335x-evm.dts | 3 +++
> drivers/usb/musb/musb_dsps.c | 2 ++
> 2 files changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am335x-evm.dts
> b/arch/arm/boot/dts/am335x-evm.dts
> index 648a67e..794b38b9 100644
> --- a/arch/arm/boot/dts/am335x-evm.dts
> +++ b/arch/arm/boot/dts/am335x-evm.dts
> @@ -192,6 +192,9 @@
>
> usb@47401800 {
> status = "okay";
> + musb1: usb@47401c00 {
> + port-mode = <1>;
> + };
> };
>
> dma-controller@07402000 {
> diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
> index 7368577..b7b2346 100644
> --- a/drivers/usb/musb/musb_dsps.c
> +++ b/drivers/usb/musb/musb_dsps.c
> @@ -230,6 +230,8 @@ static void dsps_musb_try_idle(struct musb *musb,
> unsigned long timeout)
> glue->last_timer = jiffies;
> return;
> }
> + if (musb->port_mode == MUSB_PORT_MODE_HOST)
> + return;
>
> if (time_after(glue->last_timer, timeout) &&
> timer_pending(&glue->timer)) {
> --
> 1.8.4.rc2
>
--
balbi
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