diff options
| author | Mian Yousaf Kaukab <yousaf.kaukab@intel.com> | 2015-09-29 12:08:29 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-10-01 12:40:27 -0500 |
| commit | 8fc37b82a4a43f63e3464e5d02578ea988cb5c01 (patch) | |
| tree | 58c042f0f5270162ce6129b6b39451b471c531aa /drivers/usb/dwc2 | |
| parent | 61f7223bf14689382fdf36b7580f206745c2409a (diff) | |
| download | op-kernel-dev-8fc37b82a4a43f63e3464e5d02578ea988cb5c01.zip op-kernel-dev-8fc37b82a4a43f63e3464e5d02578ea988cb5c01.tar.gz | |
usb: dwc2: gadget: handle reset interrupt before endpoint interrupts
If system is loaded, reset, enum-done and setup interrupts can occur
at the same time. Current interrupt handling sequence will handle
setup packet's interrupt before handling reset interrupt. Which will
break the enumeration process. Correct sequence is to handle reset,
enum-done and then any other endpoint interrupts.
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index ef96481..bdda32c 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2460,6 +2460,36 @@ irq_retry: gintsts &= gintmsk; + if (gintsts & GINTSTS_RESETDET) { + dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__); + + dwc2_writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS); + + /* This event must be used only if controller is suspended */ + if (hsotg->lx_state == DWC2_L2) { + dwc2_exit_hibernation(hsotg, true); + hsotg->lx_state = DWC2_L0; + } + } + + if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) { + + u32 usb_status = dwc2_readl(hsotg->regs + GOTGCTL); + u32 connected = hsotg->connected; + + dev_dbg(hsotg->dev, "%s: USBRst\n", __func__); + dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", + dwc2_readl(hsotg->regs + GNPTXSTS)); + + dwc2_writel(GINTSTS_USBRST, hsotg->regs + GINTSTS); + + /* Report disconnection if it is not already done. */ + dwc2_hsotg_disconnect(hsotg); + + if (usb_status & GOTGCTL_BSESVLD && connected) + dwc2_hsotg_core_init_disconnected(hsotg, true); + } + if (gintsts & GINTSTS_ENUMDONE) { dwc2_writel(GINTSTS_ENUMDONE, hsotg->regs + GINTSTS); @@ -2491,36 +2521,6 @@ irq_retry: } } - if (gintsts & GINTSTS_RESETDET) { - dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__); - - dwc2_writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS); - - /* This event must be used only if controller is suspended */ - if (hsotg->lx_state == DWC2_L2) { - dwc2_exit_hibernation(hsotg, true); - hsotg->lx_state = DWC2_L0; - } - } - - if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) { - - u32 usb_status = dwc2_readl(hsotg->regs + GOTGCTL); - u32 connected = hsotg->connected; - - dev_dbg(hsotg->dev, "%s: USBRst\n", __func__); - dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", - dwc2_readl(hsotg->regs + GNPTXSTS)); - - dwc2_writel(GINTSTS_USBRST, hsotg->regs + GINTSTS); - - /* Report disconnection if it is not already done. */ - dwc2_hsotg_disconnect(hsotg); - - if (usb_status & GOTGCTL_BSESVLD && connected) - dwc2_hsotg_core_init_disconnected(hsotg, true); - } - /* check both FIFOs */ if (gintsts & GINTSTS_NPTXFEMP) { |
