usb: r8a66597-hcd: fix iinterval for Full/Low speed device
fix interrupt transfer interval for Full/Low speed device. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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0bf32b807f
commit
397f519a0d
1 changed files with 27 additions and 4 deletions
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@ -863,6 +863,32 @@ static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
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dev->dma_map = 0;
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}
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static u16 get_interval(struct urb *urb, __u8 interval)
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{
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u16 time = 1;
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int i;
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if (urb->dev->speed == USB_SPEED_HIGH) {
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if (interval > IITV)
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time = IITV;
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else
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time = interval ? interval - 1 : 0;
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} else {
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if (interval > 128) {
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time = IITV;
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} else {
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/* calculate the nearest value for PIPEPERI */
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for (i = 0; i < 7; i++) {
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if ((1 << i) < interval &&
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(1 << (i + 1) > interval))
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time = 1 << i;
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}
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}
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}
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return time;
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}
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static unsigned long get_timer_interval(struct urb *urb, __u8 interval)
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{
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__u8 i;
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@ -901,10 +927,7 @@ static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
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info.interval = 0;
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info.timer_interval = 0;
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} else {
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if (ep->bInterval > IITV)
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info.interval = IITV;
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else
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info.interval = ep->bInterval ? ep->bInterval - 1 : 0;
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info.interval = get_interval(urb, ep->bInterval);
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info.timer_interval = get_timer_interval(urb, ep->bInterval);
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}
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if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
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