diff options
| author | Fabio Baltieri <fabio.baltieri@linaro.org> | 2013-03-08 02:27:07 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-03-18 12:41:32 (GMT) |
| commit | 0135522c48982cf1d456d863272e911fdf8a17da (patch) | |
| tree | 1fcc113a2f9957e5e929b9b4b909d81a7009ada1 /drivers | |
| parent | 996a9d26d37c7dca27b7e9830a49daa74a2603b7 (diff) | |
| download | linux-0135522c48982cf1d456d863272e911fdf8a17da.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/musb/ux500.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c index 0332fcd..0ae9472 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, 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; |