diff options
Diffstat (limited to 'drivers/usb/host/uhci-hcd.h')
| -rw-r--r-- | drivers/usb/host/uhci-hcd.h | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h index c87ceaa178b6..eaac6ddf03a0 100644 --- a/drivers/usb/host/uhci-hcd.h +++ b/drivers/usb/host/uhci-hcd.h @@ -140,6 +140,8 @@ struct uhci_qh { unsigned long advance_jiffies; /* Time of last queue advance */ unsigned int unlink_frame; /* When the QH was unlinked */ + unsigned int period; /* For Interrupt and Isochronous QHs */ + int state; /* QH_STATE_xxx; see above */ int type; /* Queue type (control, bulk, etc) */ @@ -315,38 +317,8 @@ static inline u32 td_status(struct uhci_td *td) { #define skel_bulk_qh skelqh[12] #define skel_term_qh skelqh[13] -/* - * Search tree for determining where <interval> fits in the skelqh[] - * skeleton. - * - * An interrupt request should be placed into the slowest skelqh[] - * which meets the interval/period/frequency requirement. - * An interrupt request is allowed to be faster than <interval> but not slower. - * - * For a given <interval>, this function returns the appropriate/matching - * skelqh[] index value. - */ -static inline int __interval_to_skel(int interval) -{ - if (interval < 16) { - if (interval < 4) { - if (interval < 2) - return 9; /* int1 for 0-1 ms */ - return 8; /* int2 for 2-3 ms */ - } - if (interval < 8) - return 7; /* int4 for 4-7 ms */ - return 6; /* int8 for 8-15 ms */ - } - if (interval < 64) { - if (interval < 32) - return 5; /* int16 for 16-31 ms */ - return 4; /* int32 for 32-63 ms */ - } - if (interval < 128) - return 3; /* int64 for 64-127 ms */ - return 2; /* int128 for 128-255 ms (Max.) */ -} +/* Find the skelqh entry corresponding to an interval exponent */ +#define UHCI_SKEL_INDEX(exponent) (9 - exponent) /* |