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Detect external SRAM.

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Count the number of detected 3940 controllers.  Tag all even controllers
as being the "B Channel".
This commit is contained in:
Justin T. Gibbs 1995-09-05 23:53:48 +00:00
parent 67f06b6142
commit cad8dd8860
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=10570
1 changed files with 35 additions and 4 deletions
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39
sys/pci/aic7870.c
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@ -1,6 +1,6 @@
/*
* Product specific probe and attach routines for:
* 2940, aic7870, and aic7850 motherboard SCSI controllers
* 3940, 2940, aic7870, and aic7850 SCSI controllers
*
* Copyright (c) 1995 Justin T. Gibbs
* All rights reserved.
@ -19,7 +19,7 @@
* 4. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: aic7870.c,v 1.12 1995/07/04 21:21:33 gibbs Exp $
* $Id: aic7870.c,v 1.13 1995/08/20 03:18:09 gibbs Exp $
*/
#include <pci.h>
@ -40,10 +40,24 @@
#define PCI_DEVICE_ID_ADAPTEC_AIC7870 0x70789004ul
#define PCI_DEVICE_ID_ADAPTEC_AIC7850 0x50789004ul
#define DEVCONFIG 0x40
#define MPORTMODE 0x00000400ul /* aic7870 only */
#define RAMPSM 0x00000200ul /* aic7870 only */
#define VOLSENSE 0x00000100ul
#define DEVCONFIG7 0x00000080ul
#define MRDCEN 0x00000040ul
#define EXTSCBTIME 0x00000020ul /* aic7870 only */
#define EXTSCBPEN 0x00000010ul /* aic7870 only */
#define BERREN 0x00000008ul
#define DACEN 0x00000004ul
#define STPWLEVEL 0x00000002ul
#define DIFACTNEGEN 0x00000001ul /* aic7870 only */
static char* aic7870_probe __P((pcici_t tag, pcidi_t type));
void aic7870_attach __P((pcici_t config_id, int unit));
static u_long aic7870_count;
static u_char aic3940_count;
struct pci_device ahc_device = {
"ahc",
@ -86,6 +100,7 @@ aic7870_attach(config_id, unit)
u_long io_port;
unsigned opri = 0;
ahc_type ahc_t = AHC_NONE;
ahc_flag ahc_f = AHC_FNONE;
if(!(io_port = pci_conf_read(config_id, PCI_BASEADR0)))
return;
/*
@ -96,9 +111,13 @@ aic7870_attach(config_id, unit)
*/
io_port -= 0xc01ul;
switch (pci_conf_read (config_id, PCI_ID_REG)) {
switch (pci_conf_read(config_id, PCI_ID_REG)) {
case PCI_DEVICE_ID_ADAPTEC_3940:
ahc_t = AHC_394;
aic3940_count++;
if(!(aic3940_count & 0x01))
/* Even count implies second channel */
ahc_f |= AHC_CHNLB;
break;
case PCI_DEVICE_ID_ADAPTEC_2940:
ahc_t = AHC_294;
@ -113,7 +132,19 @@ aic7870_attach(config_id, unit)
break;
}
if(ahcprobe(unit, io_port, ahc_t)){
if(ahc_t & AHC_AIC7870){
u_long devconfig = pci_conf_read(config_id, DEVCONFIG);
if(devconfig & RAMPSM) {
/*
* External SRAM present. Have the probe walk
* the SCBs to see how much SRAM we have and set
* the number of SCBs accordingly.
*/
ahc_f |= AHC_EXTSCB;
}
}
if(ahcprobe(unit, io_port, ahc_t, ahc_f)){
ahc_unit++;
/*
* To be compatible with the isa style of