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If setting to pio mode < 3 fails, try to set pio mode 3 before returning

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EIO. The spec says ATAPI devices should support "PIO 3 or better".
They are supposed to support less as well. Setting the device to a highter
mode than the controller shoul'nt be a problem, and this is likely what
happens with legaty ISA controllers.
Solve problem reported by Ruey-Shyang Guo.
This commit is contained in:
bouyer 1999-04-15 16:21:27 +00:00
parent d79296c5e9
commit b5f3e628a3
1 changed files with 10 additions and 3 deletions
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13
sys/dev/scsipi/atapi_wdc.c
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@ -1,4 +1,4 @@
/* $NetBSD: atapi_wdc.c,v 1.21 1999/04/08 11:29:01 bouyer Exp $ */
/* $NetBSD: atapi_wdc.c,v 1.22 1999/04/15 16:21:27 bouyer Exp $ */
/*
* Copyright (c) 1998 Manuel Bouyer.
@ -702,6 +702,7 @@ again:
WDSD_IBM | (xfer->drive << 4));
switch (drvp->state) {
case PIOMODE:
piomode:
/* Don't try to set mode if controller can't be adjusted */
if ((chp->wdc->cap & WDC_CAPABILITY_MODE) == 0)
goto ready;
@ -716,8 +717,14 @@ again:
errstring = "piomode";
if (wait_for_unbusy(chp, delay))
goto timeout;
if (chp->ch_status & WDCS_ERR)
goto error;
if (chp->ch_status & WDCS_ERR) {
if (drvp->PIO_mode < 3) {
drvp->PIO_mode = 3;
goto piomode;
} else {
goto error;
}
}
/* fall through */
case DMAMODE: