On Thu, Mar 07, 2013 at 04:57:40PM +0800, Fabio Baltieri wrote:
> Add transceiver notifier event handling to the ux500 driver to set vbus
> on specific transceiver events.
>
> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Signed-off-by: Fabio Baltieri <fabio.baltieri@xxxxxxxxxx>
> ---
Sorry, I forgot about:
v2:
- turn off vbus on USB_EVENT_VBUS event
Note that this causes a trivial context conflict with patch 5, let me
know if you want me to resend the whole set.
Thanks,
Fabio
> drivers/usb/musb/ux500.c | 42 ++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 42 insertions(+)
>
> diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
> index 5b742ba..55f24c6 100644
> --- a/drivers/usb/musb/ux500.c
> +++ b/drivers/usb/musb/ux500.c
> @@ -98,6 +98,37 @@ static void ux500_musb_set_vbus(struct musb *musb, int is_on)
> musb_readb(musb->mregs, MUSB_DEVCTL));
> }
>
> +static int musb_otg_notifications(struct notifier_block *nb,
> + unsigned long event, void *unused)
> +{
> + struct musb *musb = container_of(nb, struct musb, nb);
> +
> + dev_dbg(musb->controller, "musb_otg_notifications %ld %s\n",
> + event, otg_state_string(musb->xceiv->state));
> +
> + switch (event) {
> + case USB_EVENT_ID:
> + dev_dbg(musb->controller, "ID GND\n");
> + ux500_musb_set_vbus(musb, 1);
> + break;
> + case USB_EVENT_VBUS:
> + dev_dbg(musb->controller, "VBUS Connect\n");
> + ux500_musb_set_vbus(musb, 0);
> + break;
> + case USB_EVENT_NONE:
> + dev_dbg(musb->controller, "VBUS Disconnect\n");
> + if (is_host_active(musb))
> + ux500_musb_set_vbus(musb, 0);
> + else
> + musb->xceiv->state = OTG_STATE_B_IDLE;
> + break;
> + default:
> + dev_dbg(musb->controller, "ID float\n");
> + return NOTIFY_DONE;
> + }
> + return NOTIFY_OK;
> +}
> +
> static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
> {
> unsigned long flags;
> @@ -120,12 +151,21 @@ static irqreturn_t ux500_musb_interrupt(int irq, void *__hci)
>
> static int ux500_musb_init(struct musb *musb)
> {
> + int status;
> +
> musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
> if (IS_ERR_OR_NULL(musb->xceiv)) {
> pr_err("HS USB OTG: no transceiver configured\n");
> return -EPROBE_DEFER;
> }
>
> + musb->nb.notifier_call = musb_otg_notifications;
> + status = usb_register_notifier(musb->xceiv, &musb->nb);
> + if (status < 0) {
> + dev_dbg(musb->controller, "notification register failed\n");
> + return status;
> + }
> +
> musb->isr = ux500_musb_interrupt;
>
> return 0;
> @@ -133,6 +173,8 @@ static int ux500_musb_init(struct musb *musb)
>
> static int ux500_musb_exit(struct musb *musb)
> {
> + usb_unregister_notifier(musb->xceiv, &musb->nb);
> +
> usb_put_phy(musb->xceiv);
>
> return 0;
> --
> 1.8.1.3
>
--
Fabio Baltieri
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