diff options
| author | Minas Harutyunyan <hminas@synopsys.com> | 2018-01-19 14:43:53 +0400 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-13 10:47:43 +0200 |
| commit | a82c7abdf8fc3b09c4a0ed2eee6d43ecef2ccdb0 (patch) | |
| tree | 0649a947e3efbe873e950de6b696a3216660fbe2 /drivers/usb | |
| parent | 9d729a7a7ac531b1de335d7b9ae8bd4de8036ab9 (diff) | |
usb: dwc2: hcd: Fix host channel halt flow
According databook in Buffer and External DMA mode
non-split periodic channels can't be halted.
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')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index d4b61330dfbb..2cb4f4f3981f 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -977,6 +977,24 @@ void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s()\n", __func__); + + /* + * In buffer DMA or external DMA mode channel can't be halted + * for non-split periodic channels. At the end of the next + * uframe/frame (in the worst case), the core generates a channel + * halted and disables the channel automatically. + */ + if ((hsotg->params.g_dma && !hsotg->params.g_dma_desc) || + hsotg->hw_params.arch == GHWCFG2_EXT_DMA_ARCH) { + if (!chan->do_split && + (chan->ep_type == USB_ENDPOINT_XFER_ISOC || + chan->ep_type == USB_ENDPOINT_XFER_INT)) { + dev_err(hsotg->dev, "%s() Channel can't be halted\n", + __func__); + return; + } + } + if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS) dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status); |