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usb: musb: sunxi: Set state to A_WAIT_VRISE when enabling Vbus 

When the board is powering attached usb devices via the otg port
sometimes / on some devices it takes slightly too long for the Vbus
detection code in phy-sun4i-usb.c to signal that Vbus is high after
enabling Vbus and the musb hardware signals a MUSB_INTR_VBUSERROR
interrupt.

This commit sets the otg state to A_WAIT_VRISE upon enabling Vbus
making musb_stage0_irq() ignore the first VBUSERR_RETRY_COUNT
VBUSERROR interrupts, fixing connection issues in these cases.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[b-liu@ti.com: revise subject prefix]
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2016-05-31 10:05:08 -05:00 committed by Greg Kroah-Hartman
parent 37f30d887a
commit a60d541a2d
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/usb/musb/sunxi.c
View File

@ -112,7 +112,7 @@ static void sunxi_musb_work(struct work_struct *work)
if (test_bit(SUNXI_MUSB_FL_HOSTMODE, &glue->flags)) {
set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
musb->xceiv->otg->default_a = 1;
musb->xceiv->otg->state = OTG_STATE_A_IDLE;
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
MUSB_HST_MODE(musb);
devctl |= MUSB_DEVCTL_SESSION;
} else {
@ -145,10 +145,12 @@ static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
{
struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
if (is_on)
if (is_on) {
set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
else
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
} else {
clear_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
}
schedule_work(&glue->work);
}
@ -325,6 +327,7 @@ static int sunxi_set_mode(struct musb *musb, u8 mode)
set_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
/* Stop musb work from turning vbus off again */
set_bit(SUNXI_MUSB_FL_VBUS_ON, &glue->flags);
musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
}
return 0;