| Message ID | 1413464285-24172-2-git-send-email-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Oct 16, 2014 at 02:57:57PM +0200, Marek Szyprowski wrote: > This patch adds a call to s3c_hsotg_disconnect() from 'end session' > interrupt to correctly notify gadget subsystem about unplugged usb > cable. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > drivers/usb/dwc2/gadget.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c > index 7b5856fadd93..119c8a3effc2 100644 > --- a/drivers/usb/dwc2/gadget.c > +++ b/drivers/usb/dwc2/gadget.c > @@ -2279,6 +2279,12 @@ irq_retry: > dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); > > writel(otgint, hsotg->regs + GOTGINT); > + > + if (otgint & GOTGINT_SES_END_DET) { looks like this should be done for GINTSTS_DISCONNINT.
Hello, On 2014-10-16 15:33, Felipe Balbi wrote: > On Thu, Oct 16, 2014 at 02:57:57PM +0200, Marek Szyprowski wrote: >> This patch adds a call to s3c_hsotg_disconnect() from 'end session' >> interrupt to correctly notify gadget subsystem about unplugged usb >> cable. >> >> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> >> --- >> drivers/usb/dwc2/gadget.c | 6 ++++++ >> 1 file changed, 6 insertions(+) >> >> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c >> index 7b5856fadd93..119c8a3effc2 100644 >> --- a/drivers/usb/dwc2/gadget.c >> +++ b/drivers/usb/dwc2/gadget.c >> @@ -2279,6 +2279,12 @@ irq_retry: >> dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); >> >> writel(otgint, hsotg->regs + GOTGINT); >> + >> + if (otgint & GOTGINT_SES_END_DET) { > looks like this should be done for GINTSTS_DISCONNINT. I also would like to report it from that interrupt, but according to DWC2 databook (version 2.81a) and my observations on Samsung Exynos SoCs, DISCONNINT interrupt is asserted only in host mode, so in device mode we need to use something else. Best regards
On Fri, Oct 17, 2014 at 12:35:39PM +0200, Marek Szyprowski wrote: > Hello, > > On 2014-10-16 15:33, Felipe Balbi wrote: > >On Thu, Oct 16, 2014 at 02:57:57PM +0200, Marek Szyprowski wrote: > >>This patch adds a call to s3c_hsotg_disconnect() from 'end session' > >>interrupt to correctly notify gadget subsystem about unplugged usb > >>cable. > >> > >>Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > >>--- > >> drivers/usb/dwc2/gadget.c | 6 ++++++ > >> 1 file changed, 6 insertions(+) > >> > >>diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c > >>index 7b5856fadd93..119c8a3effc2 100644 > >>--- a/drivers/usb/dwc2/gadget.c > >>+++ b/drivers/usb/dwc2/gadget.c > >>@@ -2279,6 +2279,12 @@ irq_retry: > >> dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); > >> writel(otgint, hsotg->regs + GOTGINT); > >>+ > >>+ if (otgint & GOTGINT_SES_END_DET) { > >looks like this should be done for GINTSTS_DISCONNINT. > > I also would like to report it from that interrupt, but according to > DWC2 databook (version 2.81a) and my observations on Samsung Exynos > SoCs, DISCONNINT interrupt is asserted only in host mode, so in device > mode we need to use something else. If that's the case, then I withdraw my comments. I don't have access to HW or docs about this IP, it just looked suspicious :-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 7b5856fadd93..119c8a3effc2 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2279,6 +2279,12 @@ irq_retry: dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); writel(otgint, hsotg->regs + GOTGINT); + + if (otgint & GOTGINT_SES_END_DET) { + if (hsotg->gadget.speed != USB_SPEED_UNKNOWN) + s3c_hsotg_disconnect(hsotg); + hsotg->gadget.speed = USB_SPEED_UNKNOWN; + } } if (gintsts & GINTSTS_SESSREQINT) {
This patch adds a call to s3c_hsotg_disconnect() from 'end session' interrupt to correctly notify gadget subsystem about unplugged usb cable. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/usb/dwc2/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+)