diff options
| author | Mian Yousaf Kaukab <yousaf.kaukab@intel.com> | 2015-11-20 11:49:28 +0100 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-12-15 09:12:41 -0600 |
| commit | fbb9e22b15ad3c9a98c66bad801b4d1366e8bf20 (patch) | |
| tree | 11c3c1a561b92a95b608e597052c1ae029aa6986 /drivers/usb/dwc2/hcd.c | |
| parent | 75f5c434c30b22a48a1d4a0f827473dc29036d78 (diff) | |
| download | lwn-fbb9e22b15ad3c9a98c66bad801b4d1366e8bf20.tar.gz lwn-fbb9e22b15ad3c9a98c66bad801b4d1366e8bf20.zip | |
usb: dwc2: host: enable descriptor dma for fs devices
As descriptor dma mode does not support split transfers, it can't be
enabled for high speed devices. Add a core parameter to enable it for
full speed devices.
Ensure frame list and descriptor list are correctly freed during
disconnect.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 571c21727ff9..32c84e7a81ab 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -1734,6 +1734,28 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq, port_status |= USB_PORT_STAT_TEST; /* USB_PORT_FEAT_INDICATOR unsupported always 0 */ + if (hsotg->core_params->dma_desc_fs_enable) { + /* + * Enable descriptor DMA only if a full speed + * device is connected. + */ + if (hsotg->new_connection && + ((port_status & + (USB_PORT_STAT_CONNECTION | + USB_PORT_STAT_HIGH_SPEED | + USB_PORT_STAT_LOW_SPEED)) == + USB_PORT_STAT_CONNECTION)) { + u32 hcfg; + + dev_info(hsotg->dev, "Enabling descriptor DMA mode\n"); + hsotg->core_params->dma_desc_enable = 1; + hcfg = dwc2_readl(hsotg->regs + HCFG); + hcfg |= HCFG_DESCDMA; + dwc2_writel(hcfg, hsotg->regs + HCFG); + hsotg->new_connection = false; + } + } + dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status); *(__le32 *)buf = cpu_to_le32(port_status); break; |