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| author | Hans de Goede <hdegoede@redhat.com> | 2016-05-31 10:05:08 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-01 14:58:59 -0700 |
| commit | a60d541a2d402c8645d5bb2ec8dabe474b66e018 (patch) | |
| tree | d0abaf2d3f99adcdf6ee60c58b4c7d54330bcece /drivers/usb | |
| parent | 37f30d887a41775066b78f8c0fa9a4929638db07 (diff) | |
| download | blackbird-op-linux-a60d541a2d402c8645d5bb2ec8dabe474b66e018.tar.gz blackbird-op-linux-a60d541a2d402c8645d5bb2ec8dabe474b66e018.zip | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/sunxi.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 2c33d9bca587..e7d46179b485 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -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; |
