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usb: dwc2: gadget: handle reset interrupt before endpoint interrupts

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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>
This commit is contained in:
Mian Yousaf Kaukab
2015-09-29 12:08:29 +02:00
committad av Felipe Balbi
förälder 61f7223bf1
incheckning 8fc37b82a4
1 ändrade filer med 30 tillägg och 30 borttagningar
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60
drivers/usb/dwc2/gadget.c
Visa fil

@@ -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) {