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usb: musb: ux500: add otg notifier support 

Add transceiver notifier event handling to the ux500 driver to set vbus
on specific transceiver events.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>

[ balbi@ti.com: fix build error due to missing
	otg_state_string() ]

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Fabio Baltieri 2013-03-08 10:27:07 +08:00 committed by Felipe Balbi
parent 996a9d26d3
commit 0135522c48
1 changed files with 42 additions and 0 deletions
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42
drivers/usb/musb/ux500.c
View File

@ -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, usb_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;