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Preserve termination settings across the card reset in our shutdown hook.

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This commit is contained in:
Justin T. Gibbs 1999-04-19 21:28:15 +00:00
parent d72b216c5b
commit b19a4814fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=45847
1 changed files with 36 additions and 4 deletions
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40
sys/dev/aic7xxx/aic7xxx.c
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@ -36,7 +36,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7xxx.c,v 1.20 1999/03/23 07:24:26 gibbs Exp $
* $Id: aic7xxx.c,v 1.21 1999/04/07 23:02:45 gibbs Exp $
*/
/*
* A few notes on features of the driver.
@ -2635,8 +2635,6 @@ ahc_handle_message_phase(struct ahc_softc *ahc, struct cam_path *path)
int end_session;
ahc_fetch_devinfo(ahc, &devinfo);
end_session = FALSE;
bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK;
@ -4206,11 +4204,12 @@ ahc_action(struct cam_sim *sim, union ccb *ccb)
else
maxsync = AHC_SYNCRATE_FAST;
if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) {
if (update_type & AHC_TRANS_USER)
cts->sync_offset = tinfo->user.offset;
else
cts->sync_offset = tinfo->goal.offset;
}
syncrate = ahc_find_syncrate(ahc, &cts->sync_period,
maxsync);
@ -5970,10 +5969,43 @@ ahc_shutdown(int howto, void *arg)
{
struct ahc_softc *ahc;
int i;
u_int sxfrctl1_a, sxfrctl1_b;
ahc = (struct ahc_softc *)arg;
pause_sequencer(ahc);
/*
* Preserve the value of the SXFRCTL1 register for all channels.
* It contains settings that affect termination and we don't want
* to disturb the integrity of the bus during shutdown in case
* we are in a multi-initiator setup.
*/
sxfrctl1_b = 0;
if ((ahc->features & AHC_TWIN) != 0) {
u_int sblkctl;
sblkctl = ahc_inb(ahc, SBLKCTL);
ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
sxfrctl1_b = ahc_inb(ahc, SXFRCTL1);
ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
}
sxfrctl1_a = ahc_inb(ahc, SXFRCTL1);
/* This will reset most registers to 0, but not all */
ahc_reset(ahc);
if ((ahc->features & AHC_TWIN) != 0) {
u_int sblkctl;
sblkctl = ahc_inb(ahc, SBLKCTL);
ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB);
ahc_outb(ahc, SXFRCTL1, sxfrctl1_b);
ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB);
}
ahc_outb(ahc, SXFRCTL1, sxfrctl1_a);
ahc_outb(ahc, SCSISEQ, 0);
ahc_outb(ahc, SXFRCTL0, 0);
ahc_outb(ahc, DSPCISTATUS, 0);