From: Minas Harutyunyan <hminas@xxxxxxxxxxxx> Before flushing fifos required to check AHB master state and lush when AHB master is in IDLE state. Signed-off-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx> Signed-off-by: Grigor Tovmasyan <tovmasya@xxxxxxxxxxxx> --- drivers/usb/dwc2/core.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 6868ddf972f7..64a0b2068b14 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -658,6 +658,11 @@ void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num) dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num); + /* Wait for AHB master IDLE state */ + if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000)) + dev_warn(hsotg->dev, "%s: HANG! AHB Idle GRSCTL\n", + __func__); + greset = GRSTCTL_TXFFLSH; greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK; dwc2_writel(greset, hsotg->regs + GRSTCTL); @@ -681,6 +686,11 @@ void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg) dev_vdbg(hsotg->dev, "%s()\n", __func__); + /* Wait for AHB master IDLE state */ + if (dwc2_hsotg_wait_bit_set(hsotg, GRSTCTL, GRSTCTL_AHBIDLE, 10000)) + dev_warn(hsotg->dev, "%s: HANG! AHB Idle GRSCTL\n", + __func__); + greset = GRSTCTL_RXFFLSH; dwc2_writel(greset, hsotg->regs + GRSTCTL); -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
