diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-11-21 17:14:47 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-11-21 18:07:34 +0300 |
| commit | 4ace06e8b3c32d6a601474af31580bbc1027fa9f (patch) | |
| tree | 387a8e26a4c04d001676e1b14a1539a48d919875 /drivers/usb/dwc2/core_intr.c | |
| parent | ed692a99f31c92ec649ee2f7a0ecb4aa0f69d853 (diff) | |
| download | linux-4ace06e8b3c32d6a601474af31580bbc1027fa9f.tar.xz | |
usb: dwc2: gadget: rework disconnect event handling
This patch adds a call to s3c_hsotg_disconnect() from 'end session'
interrupt (GOTGINT_SES_END_DET) to correctly notify gadget subsystem
about unplugged usb cable. DISCONNINT interrupt cannot be used for this
purpose, because it is asserted only in host mode.
To avoid reporting disconnect event more than once, a disconnect call has
been moved from USB_REQ_SET_ADDRESS handling function to SESSREQINT
interrupt. This way driver ensures that disconnect event is reported
either when usb cable is unplugged or every time the host starts a new
session. To handle devices which has been synthesized without
SRP support, connected state is set in ENUMDONE interrupt.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc2/core_intr.c')
| -rw-r--r-- | drivers/usb/dwc2/core_intr.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index b176c2fc34e5..ad43c5bc1ef1 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -128,6 +128,9 @@ static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg) dwc2_op_state_str(hsotg)); gotgctl = readl(hsotg->regs + GOTGCTL); + if (dwc2_is_device_mode(hsotg)) + s3c_hsotg_disconnect(hsotg); + if (hsotg->op_state == OTG_STATE_B_HOST) { hsotg->op_state = OTG_STATE_B_PERIPHERAL; } else { @@ -314,6 +317,12 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg) /* Clear interrupt */ writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS); + + /* + * Report disconnect if there is any previous session established + */ + if (dwc2_is_device_mode(hsotg)) + s3c_hsotg_disconnect(hsotg); } /* |