diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-13 16:34:48 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-03-13 16:35:16 +0100 |
| commit | df8d291f28aa1e8437c8f7816328a6516379c71b (patch) | |
| tree | 26ae585aa259584ddd0d9088933547c065c37086 /drivers/usb/host/xhci-mem.c | |
| parent | 5234ffb9f74cfa8993d174782bc861dd9b7b5bfb (diff) | |
| parent | fde7d9049e55ab85a390be7f415d74c9f62dd0f9 (diff) | |
Merge branch 'linus' into irq/core
Reason: Get upstream fixes integrated before further modifications.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 36cbe2226a44..383fc857491c 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1126,26 +1126,42 @@ static unsigned int xhci_parse_exponent_interval(struct usb_device *udev, } /* - * Convert bInterval expressed in frames (in 1-255 range) to exponent of + * Convert bInterval expressed in microframes (in 1-255 range) to exponent of * microframes, rounded down to nearest power of 2. */ -static unsigned int xhci_parse_frame_interval(struct usb_device *udev, - struct usb_host_endpoint *ep) +static unsigned int xhci_microframes_to_exponent(struct usb_device *udev, + struct usb_host_endpoint *ep, unsigned int desc_interval, + unsigned int min_exponent, unsigned int max_exponent) { unsigned int interval; - interval = fls(8 * ep->desc.bInterval) - 1; - interval = clamp_val(interval, 3, 10); - if ((1 << interval) != 8 * ep->desc.bInterval) + interval = fls(desc_interval) - 1; + interval = clamp_val(interval, min_exponent, max_exponent); + if ((1 << interval) != desc_interval) dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes, ep desc says %d microframes\n", ep->desc.bEndpointAddress, 1 << interval, - 8 * ep->desc.bInterval); + desc_interval); return interval; } +static unsigned int xhci_parse_microframe_interval(struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + return xhci_microframes_to_exponent(udev, ep, + ep->desc.bInterval, 0, 15); +} + + +static unsigned int xhci_parse_frame_interval(struct usb_device *udev, + struct usb_host_endpoint *ep) +{ + return xhci_microframes_to_exponent(udev, ep, + ep->desc.bInterval * 8, 3, 10); +} + /* Return the polling or NAK interval. * * The polling interval is expressed in "microframes". If xHCI's Interval field @@ -1164,7 +1180,7 @@ static unsigned int xhci_get_endpoint_interval(struct usb_device *udev, /* Max NAK rate */ if (usb_endpoint_xfer_control(&ep->desc) || usb_endpoint_xfer_bulk(&ep->desc)) { - interval = ep->desc.bInterval; + interval = xhci_parse_microframe_interval(udev, ep); break; } /* Fall through - SS and HS isoc/int have same decoding */ |