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Interrupt polling was spread very unevenly. Use the same bit reversal 

trick as in ohci.c to correct this.
This commit is contained in:
augustss 2005-04-27 16:42:26 +00:00
parent 0e5d90ca36
commit c3aad684bd
1 changed files with 18 additions and 3 deletions
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21
sys/dev/usb/ehci.c
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@ -1,4 +1,4 @@
/* $NetBSD: ehci.c,v 1.93 2005/04/27 16:20:26 augustss Exp $ */
/* $NetBSD: ehci.c,v 1.94 2005/04/27 16:42:26 augustss Exp $ */
/*
* Copyright (c) 2004 The NetBSD Foundation, Inc.
@ -65,7 +65,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.93 2005/04/27 16:20:26 augustss Exp $");
__KERNEL_RCSID(0, "$NetBSD: ehci.c,v 1.94 2005/04/27 16:42:26 augustss Exp $");
#include "ohci.h"
#include "uhci.h"
@ -312,6 +312,17 @@ Static struct usbd_pipe_methods ehci_device_isoc_methods = {
ehci_device_isoc_done,
};
static uint8_t revbits[EHCI_MAX_POLLRATE] = {
0x00,0x80,0x40,0xc0,0x20,0xa0,0x60,0xe0,0x10,0x90,0x50,0xd0,0x30,0xb0,0x70,0xf0,
0x08,0x88,0x48,0xc8,0x28,0xa8,0x68,0xe8,0x18,0x98,0x58,0xd8,0x38,0xb8,0x78,0xf8,
0x04,0x84,0x44,0xc4,0x24,0xa4,0x64,0xe4,0x14,0x94,0x54,0xd4,0x34,0xb4,0x74,0xf4,
0x0c,0x8c,0x4c,0xcc,0x2c,0xac,0x6c,0xec,0x1c,0x9c,0x5c,0xdc,0x3c,0xbc,0x7c,0xfc,
0x02,0x82,0x42,0xc2,0x22,0xa2,0x62,0xe2,0x12,0x92,0x52,0xd2,0x32,0xb2,0x72,0xf2,
0x0a,0x8a,0x4a,0xca,0x2a,0xaa,0x6a,0xea,0x1a,0x9a,0x5a,0xda,0x3a,0xba,0x7a,0xfa,
0x06,0x86,0x46,0xc6,0x26,0xa6,0x66,0xe6,0x16,0x96,0x56,0xd6,0x36,0xb6,0x76,0xf6,
0x0e,0x8e,0x4e,0xce,0x2e,0xae,0x6e,0xee,0x1e,0x9e,0x5e,0xde,0x3e,0xbe,0x7e,0xfe,
};
usbd_status
ehci_init(ehci_softc_t *sc)
{
@ -448,7 +459,11 @@ ehci_init(ehci_softc_t *sc)
}
/* Point the frame list at the last level (128ms). */
for (i = 0; i < sc->sc_flsize; i++) {
sc->sc_flist[i] = htole32(EHCI_LINK_QH |
int j;
j = (i & ~(EHCI_MAX_POLLRATE-1)) |
revbits[i & (EHCI_MAX_POLLRATE-1)];
sc->sc_flist[j] = htole32(EHCI_LINK_QH |
sc->sc_islots[EHCI_IQHIDX(EHCI_IPOLLRATES - 1,
i)].sqh->physaddr);
}