from netbsd:

Add the "ahe" driver, autoconfiguration support for the aic7xxx-based
Adaptec 2[78]4x SCSI controllers, from Michael Graff <explorer@flame.org>.
Fixes PR #1594 from Noriyuki Soda <soda@sra.co.jp> in a different way.

2 files changed, 194 insertions, 1 deletions

diff --git a/sys/dev/isa/aha284x.c b/sys/dev/isa/aha284x.c
new file mode 100644
index 00000000000..91824287421
--- /dev/null
+++ b/sys/dev/isa/aha284x.c
@@ -0,0 +1,189 @@
+/*	$NetBSD: aha284x.c,v 1.2 1996/01/13 02:06:30 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 1996 Michael Graff.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Michael Graff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+
+#include <dev/isa/isavar.h>
+
+#include <dev/ic/aic7xxxvar.h>
+
+#include <machine/pio.h>
+
+static int ahe_probe __P((struct device *, void *, void *));
+static void ahe_attach __P((struct device *, struct device *, void *));
+
+struct cfdriver ahecd = {
+        NULL,          /* devices found */
+	"ahe",         /* device name */
+	ahe_probe,     /* match routine */
+	ahe_attach,    /* attach routine */
+	DV_DULL,       /* device class */
+        sizeof(struct ahc_softc),  /* size of private dev data */
+};
+
+/*
+ * shouldn't this be in aic7xxxvar.h?
+ */
+int ahcintr __P((void *));
+
+/*
+ * Standard EISA Host ID regs  (Offset from slot base)
+ * These seem to work on the aha284x as well (VLB card)
+ */
+#define HID0           0xC80   /* 0,1: msb of ID2, 2-7: ID1      */
+#define HID1           0xC81   /* 0-4: ID3, 5-7: LSB ID2         */
+#define HID2           0xC82   /* product                        */
+#define HID3           0xC83   /* firmware revision              */
+
+#define CHAR1(B1,B2) (((B1>>2) & 0x1F) | '@')
+#define CHAR2(B1,B2) (((B1<<3) & 0x18) | ((B2>>5) & 0x7)|'@')
+#define CHAR3(B1,B2) ((B2 & 0x1F) | '@')
+
+typedef struct {
+  ahc_type type;
+  unsigned char id; /* The Last EISA Host ID reg */
+} aic7770_sig;
+
+aic7770_sig valid_ids[] = {
+  /* Entries of other tested adaptors should be added here */
+  { AHC_274,      0x70 }, /*aic7770 on Motherboard*/
+  { AHC_274,      0x71 }, /*274x*/
+  { AHC_284,      0x56 }, /*284x, BIOS enabled*/
+  { AHC_284,      0x57 }  /*284x, BIOS disabled*/
+};
+
+int
+ahe_probe(parent, match, aux)
+        struct device *parent;
+        void *match, *aux; 
+{       
+        struct ahc_softc *ahc = match;
+        struct isa_attach_args *ia = aux;
+
+	char intdef;
+	int iobase;
+	u_char sig_id[4];
+	int i;
+
+#ifdef NEWCONFIG
+        if (ia->ia_iobase == IOBASEUNK)
+                return 0;
+#endif
+
+	/*
+         * Make the offsets the same as for EISA
+	 * 
+	 * I have NO idea why the values in aic7xxx.c are all 0xc00 too
+	 * high, but this hack fixes it.  This is the same hack that's in
+	 * the 294x pci code.
+         */
+	iobase = ia->ia_iobase - 0xc00;
+
+	for (i = 0; i < sizeof(sig_id); i++) {
+	  /*
+	   * An outb is required to prime these
+	   * registers on VL cards
+	   */
+	  outb(iobase + HID0, HID0 + i);
+	  sig_id[i] = inb(iobase + HID0 + i);
+	}
+
+	if (sig_id[0] == 0xff)
+	  return 0;
+
+	if (CHAR1(sig_id[0], sig_id[1]) != 'A'
+	    || CHAR2(sig_id[0], sig_id[1]) != 'D'
+	    || CHAR3(sig_id[0], sig_id[1]) != 'P'
+	    || sig_id[2] != 0x77)
+	  return 0;
+	
+	ahc->type = 0;
+
+	for (i = 0; i < sizeof(valid_ids)/sizeof(aic7770_sig); i++)
+	  if (sig_id[3] == valid_ids[i].id) {
+	    ahc->type = valid_ids[i].type;
+	    break;
+	  }
+	
+	if (ahc->type == 0)
+	  printf("%s: Unknown board type 0x%02x\n",
+		 ahc->sc_dev.dv_xname, sig_id[3]);
+
+	if (ahcprobe(ahc, iobase) == 0)
+	  return 0;
+
+	/*
+	 * set up some other isa variables and make certain the irq the
+	 * card is set at matches the one in the configuration file,
+	 * it is wa defined there
+	 */
+
+	ia->ia_iosize = 0x100;  /* address range for the card */
+
+	if (ia->ia_irq == IRQUNK)
+		ia->ia_irq = ahc->sc_irq;  /* probed from the card */
+	else
+		if (ia->ia_irq != ahc->sc_irq) {
+			printf("%s: irq mismatch; kernel configured %d != board configured %d\n",
+			       ahc->sc_dev.dv_xname, ia->ia_irq, ahc->sc_irq);
+			return 0;
+		}
+
+	/* Must be ok... */
+	return 1;
+}
+
+void    
+ahe_attach(parent, self, aux)
+        struct device *parent, *self;
+        void *aux;
+{
+        struct ahc_softc *ahc = (void *)self;
+        struct isa_attach_args *ia = aux;
+
+#ifdef NEWCONFIG
+        isa_establish(&ahc->sc_id, &ahc->sc_dev);
+#endif
+        ahc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_BIO,
+					ahcintr, ahc);
+
+	/*
+	 * attach the devices on the bus
+	 */
+	ahcattach(ahc);
+}
diff --git a/sys/dev/isa/files.isa b/sys/dev/isa/files.isa
index 9f83fefe196..99ac2a0ed60 100644
--- a/sys/dev/isa/files.isa
+++ b/sys/dev/isa/files.isa
@@ -1,4 +1,4 @@
-#	$NetBSD: files.isa,v 1.9 1995/11/10 19:39:21 christos Exp $
+#	$NetBSD: files.isa,v 1.10 1996/01/13 02:05:15 thorpej Exp $
 #
 # Config.new file and device description for machine-independent ISA code.
 # Included by ports that need it.  Requires that the SCSI files be
@@ -68,6 +68,10 @@ file	dev/isa/aha1542.c		aha
 device	aic at isa: scsi, isadma
 file	dev/isa/aic6360.c		aic
 
+# Adaptec 7770-based EISA, VLB, etc. controllers
+device	ahe at isa: scsi, aic7xxx
+file	dev/isa/aha284x.c		ahe
+
 # BusLogic BT-74x EISA family (XXX; should be EISA.  it's special)
 device	bt at isa: scsi, isadma
 file	dev/isa/bt742a.c		bt