Isa/VL probe portion of the Buslogic SCSI driver.

svn path=/head/; revision=12792
2025-01-27 16:39:08 +00:00 · 1995-12-12 08:50:54 +00:00 · 1995-12-12 08:50:54 +00:00 · 09c30e3a1e · 2020-12-20 02:59:44 +00:00
commit 09c30e3a1e
parent ab8f0fa54c
1 changed files with 147 additions and 0 deletions
--- a/sys/i386/isa/bt5xx-445.c
+++ b/sys/i386/isa/bt5xx-445.c
@ -0,0 +1,147 @@
+/*
+ * Written by Julian Elischer (julian@tfs.com)
+ * for TRW Financial Systems for use under the MACH(2.5) operating system.
+ *
+ * TRW Financial Systems, in accordance with their agreement with Carnegie
+ * Mellon University, makes this software available to CMU to distribute
+ * or use in any manner that they see fit as long as this message is kept with
+ * the software. For this reason TFS also grants any other persons or
+ * organisations permission to use or modify this software.
+ *
+ * TFS supplies this software to be publicly redistributed
+ * on the understanding that TFS is not responsible for the correct
+ * functioning of this software in any circumstances.
+ *
+ *      $Id: bt742a.c,v 1.43 1995/11/04 17:07:08 bde Exp $
+ */
+
+/*
+ * Bulogic/Bustek 32 bit Addressing Mode SCSI driver.
+ *
+ * NOTE: 1. Some bt5xx card can NOT handle 32 bit addressing mode.
+ *       2. OLD bt445s Revision A,B,C,D(nowired) + any firmware version
+ *          has broken busmaster for handling 32 bit addressing on H/W bus
+ *	    side.
+ *
+ *       3. Extended probing still needs confirmation from our user base, due
+ *	    to several H/W and firmware dependencies. If you have a problem
+ *	    with extended probing, please contact 'amurai@spec.co.jp'
+ *
+ *						amurai@spec.co.jp 94/6/16
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/devconf.h>
+
+#include <scsi/scsi_all.h>
+#include <scsi/scsiconf.h>
+
+#include <i386/isa/isa_device.h>
+#include <i386/scsi/btreg.h>
+
+static	int bt_isa_probe __P((struct isa_device *dev));
+static	int bt_isa_attach __P((struct isa_device *dev));
+
+struct isa_driver btdriver =
+{
+    bt_isa_probe,
+    bt_isa_attach,
+    "bt"
+};
+
+static struct kern_devconf kdc_isa_bt = {
+	0, 0, 0,		/* filled in by dev_attach */
+	"bt", 0, { MDDT_ISA, 0, "bio" },
+	isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
+	&kdc_isa0,		/* parent */
+	0,			/* parentdata */
+	DC_UNCONFIGURED,	/* always start here */
+	NULL,
+	DC_CLS_MISC		/* host adapters aren't special */
+};
+
+static inline void
+bt_isa_registerdev(struct isa_device *id)
+{
+#ifdef BOGUS
+	if(id->id_unit)
+		kdc_bt[id->id_unit] = kdc_bt[0];
+	kdc_bt[id->id_unit].kdc_unit = id->id_unit;
+	kdc_bt[id->id_unit].kdc_parentdata = id;
+	dev_attach(&kdc_bt[id->id_unit]);
+#endif
+}
+
+/*
+ * Check if the device can be found at the port given
+ * and if so, set it up ready for further work
+ * as an argument, takes the isa_device structure from
+ * autoconf.c
+ */
+static int
+bt_isa_probe(dev)
+	struct isa_device *dev;
+{
+	/*
+	 * find unit and check we have that many defined
+	 */
+	int     unit = bt_unit;
+	struct bt_data *bt;
+
+	/*
+	 * Allocate a storage area for us
+	 */
+	bt = bt_alloc(unit, dev->id_iobase);
+	if (!bt) 
+		return 0;
+
+#ifndef DEV_LKM
+	bt_isa_registerdev(dev);
+#endif /* not DEV_LKM */
+
+	/*
+	 * Try initialise a unit at this location
+	 * sets up dma and bus speed, loads bt->bt_int
+	 */
+	if (bt_init(bt) != 0) {
+		bt_free(bt);
+		return 0;
+	}
+	/*
+	 * If it's there, put in it's interrupt vectors
+	 */
+	dev->id_unit = unit;
+	dev->id_irq = (1 << bt->bt_int);
+	dev->id_drq = bt->bt_dma;
+
+	bt_unit++;
+	return 1;
+}
+
+/*
+ * Attach all the sub-devices we can find
+ */
+static int
+bt_isa_attach(dev)
+	struct isa_device *dev;
+{
+	int	unit = dev->id_unit;
+	struct	bt_data *bt = btdata[unit];
+
+	return( bt_attach(bt) );
+}
+
+/*
+ * Handle an ISA interrupt.
+ * XXX should go away as soon as ISA interrupt handlers
+ * take a (void *) arg.
+ */
+void
+bt_isa_intr(unit)
+	int	unit;
+{
+	struct bt_data* arg = btdata[unit];
+	btintr((void *)arg);
+}