diff options
| author | Minas Harutyunyan <hminas@synopsys.com> | 2018-01-19 13:44:46 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-13 11:47:43 +0300 |
| commit | 8f55fd6041323dd528e85d4303519d053110a5d4 (patch) | |
| tree | 727389d2c7116749385ca857621b77d71cac93ef /drivers/usb/dwc2/core.c | |
| parent | 92a8dd26464e1f21f1d869ec53717bd2c1200d63 (diff) | |
| download | linux-8f55fd6041323dd528e85d4303519d053110a5d4.tar.xz | |
usb: dwc2: Change TxFIFO and RxFIFO flushing flow
Before flushing fifos required to check AHB master state and
lush when AHB master is in IDLE state.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/core.c')
| -rw-r--r-- | drivers/usb/dwc2/core.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 6294cee64e60..e85f2d230da4 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -675,6 +675,11 @@ 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); @@ -698,6 +703,11 @@ 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); |