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Turn on the MAXP bit in the controller to allow 64 byte packets at 

the end of a frame.
This commit is contained in:
augustss 1999-12-24 13:56:35 +00:00
parent be25932666
commit 6e2f22c70f
1 changed files with 12 additions and 4 deletions
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16
sys/dev/usb/uhci.c
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@ -1,4 +1,4 @@
/* $NetBSD: uhci.c,v 1.70 1999/12/06 21:07:00 augustss Exp $ */
/* $NetBSD: uhci.c,v 1.71 1999/12/24 13:56:35 augustss Exp $ */
/* $FreeBSD: src/sys/dev/usb/uhci.c,v 1.33 1999/11/17 22:33:41 n_hibma Exp $ */
/*
@ -42,10 +42,10 @@
* USB Universal Host Controller driver.
* Handles e.g. PIIX3 and PIIX4.
*
* Data sheets: ftp://download.intel.com/design/intarch/datashts/29055002.pdf
* ftp://download.intel.com/design/intarch/datashts/29056201.pdf
* UHCI spec: http://www.intel.com/design/usb/uhci11d.pdf
* USB spec: http://www.usb.org/developers/data/usb11.pdf
* PIIXn spec: ftp://download.intel.com/design/intarch/datashts/29055002.pdf
* ftp://download.intel.com/design/intarch/datashts/29056201.pdf
*/
#include <sys/param.h>
@ -429,6 +429,8 @@ uhci_init(sc)
UWRITE2(sc, UHCI_INTR, UHCI_INTR_TOCRCIE | UHCI_INTR_RIE |
UHCI_INTR_IOCE | UHCI_INTR_SPIE); /* enable interrupts */
UHCICMD(sc, UHCI_CMD_MAXP); /* Assume 64 byte packets at frame end */
return (uhci_run(sc, 1)); /* and here we go... */
}
@ -1206,11 +1208,17 @@ uhci_run(sc, run)
int run;
{
int s, n, running;
u_int16_t cmd;
run = run != 0;
s = splusb();
DPRINTF(("uhci_run: setting run=%d\n", run));
UHCICMD(sc, run ? UHCI_CMD_RS : 0);
cmd = UREAD2(sc, UHCI_CMD);
if (run)
cmd |= UHCI_CMD_RS;
else
cmd &= ~UHCI_CMD_RS;
UHCICMD(sc, cmd);
for(n = 0; n < 10; n++) {
running = !(UREAD2(sc, UHCI_STS) & UHCI_STS_HCH);
/* return when we've entered the state we want */