diff options
| author |   Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-03-08 10:52:05 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-10 09:37:17 +0100 |
| commit | fb95c7cf5600b7b74412f27dfb39a1e13fd8a90d (patch) | |
| tree | a26adef0d2e1159293afa37941a1970bd206d2a5 /drivers/usb/core/endpoint.c | |
| parent | usb: xhci-mtk: support to build xhci-mtk-hcd.ko (diff) | |
| download | linux-dev-fb95c7cf5600b7b74412f27dfb39a1e13fd8a90d.tar.xz linux-dev-fb95c7cf5600b7b74412f27dfb39a1e13fd8a90d.zip | |
usb: common: add function to get interval expressed in us unit
Add a new function to convert bInterval into the time expressed
in 1us unit.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/25c8a09b055f716c1e5bf11fea72c3418f844482.1615170625.git.chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/core/endpoint.c | 35 |
1 files changed, 4 insertions, 31 deletions
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c index 903426b6d305..a2530811cf7d 100644 --- a/drivers/usb/core/endpoint.c +++ b/drivers/usb/core/endpoint.c @@ -84,40 +84,13 @@ static ssize_t interval_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ep_device *ep = to_ep_device(dev); + unsigned int interval; char unit; - unsigned interval = 0; - unsigned in; - in = (ep->desc->bEndpointAddress & USB_DIR_IN); - - switch (usb_endpoint_type(ep->desc)) { - case USB_ENDPOINT_XFER_CONTROL: - if (ep->udev->speed == USB_SPEED_HIGH) - /* uframes per NAK */ - interval = ep->desc->bInterval; - break; - - case USB_ENDPOINT_XFER_ISOC: - interval = 1 << (ep->desc->bInterval - 1); - break; - - case USB_ENDPOINT_XFER_BULK: - if (ep->udev->speed == USB_SPEED_HIGH && !in) - /* uframes per NAK */ - interval = ep->desc->bInterval; - break; - - case USB_ENDPOINT_XFER_INT: - if (ep->udev->speed == USB_SPEED_HIGH) - interval = 1 << (ep->desc->bInterval - 1); - else - interval = ep->desc->bInterval; - break; - } - interval *= (ep->udev->speed == USB_SPEED_HIGH) ? 125 : 1000; - if (interval % 1000) + interval = usb_decode_interval(ep->desc, ep->udev->speed); + if (interval % 1000) { unit = 'u'; - else { + } else { unit = 'm'; interval /= 1000; } |