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Fix parity error detection logic for aic7880 and aic7895 chips during 

the probe of external SRAM.

Approved by: jkh@FreeBSD.org
This commit is contained in:
Justin T. Gibbs 2000-02-09 21:00:22 +00:00
parent 6cd756a2b5
commit 1907f932b8
1 changed files with 22 additions and 8 deletions
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30
sys/dev/aic7xxx/ahc_pci.c
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@ -549,11 +549,11 @@ static void configure_termination(struct ahc_softc *ahc,
u_int *sxfrctl1);
static void ahc_new_term_detect(struct ahc_softc *ahc,
int *enableSEC_low,
int *enableSEC_high,
int *enablePRI_low,
int *enablePRI_high,
int *eeprom_present);
int *enableSEC_low,
int *enableSEC_high,
int *enablePRI_low,
int *enablePRI_high,
int *eeprom_present);
static void aic787X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
int *internal68_present,
int *externalcable_present,
@ -956,6 +956,15 @@ ahc_probe_ext_scbram(struct ahc_softc *ahc)
}
enable = TRUE;
/*
* Clear any outstanding parity error
* and ensure that parity error reporting
* is enabled.
*/
ahc_outb(ahc, SEQCTL, 0);
ahc_outb(ahc, CLRINT, CLRPARERR);
ahc_outb(ahc, CLRINT, CLRBRKADRINT);
/* Now see if we can do parity */
ahc_ext_scbram_config(ahc, enable, /*pcheck*/TRUE, fast);
num_scbs = ahc_probe_scbs(ahc);
@ -976,12 +985,17 @@ ahc_probe_ext_scbram(struct ahc_softc *ahc)
fast = TRUE;
done:
/* Clear any resulting parity error */
/*
* Disable parity error reporting until we
* can load instruction ram.
*/
ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
/* Clear any latched parity error */
ahc_outb(ahc, CLRINT, CLRPARERR);
ahc_outb(ahc, CLRINT, CLRBRKADRINT);
if (bootverbose && enable) {
printf("%s: External SRAM, %dns access%s\n",
ahc_name(ahc), fast ? 10 : 20,
printf("%s: External SRAM, %s access%s\n",
ahc_name(ahc), fast ? "fast" : "slow",
pcheck ? ", parity checking enabled" : "");
}