patch-2.3.99-pre1 linux/drivers/ide/qd6580.c

• Lines: 72
• Date: Sat Feb 26 20:32:14 2000
• Orig file: v2.3.51/linux/drivers/ide/qd6580.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.51/linux/drivers/ide/qd6580.c linux/drivers/ide/qd6580.c
@@ -0,0 +1,71 @@
+/*
+ *  linux/drivers/block/qd6580.c		Version 0.02	Feb 09, 1996
+ *
+ *  Copyright (C) 1996  Linus Torvalds & author (see below)
+ */
+
+/*
+ * QDI QD6580 EIDE controller fast support by Colten Edwards.
+ * No net access, but (maybe) can be reached at pje120@cs.usask.ca
+ */
+
+#undef REALLY_SLOW_IO           /* most systems can safely undef this */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#include "ide_modes.h"
+
+/*
+ * Register 0xb3 looks like:
+ *	0x4f is fast		mode3 ?
+ *	0x3f is medium		mode2 ?
+ *	0x2f is slower		mode1 ?
+ *	0x1f is slower yet	mode0 ?
+ *	0x0f ???		???
+ *
+ * Don't know whether this sets BOTH drives, or just the first drive.
+ * Don't know if there is a separate setting for the second drive.
+ *
+ * Feel free to patch this if you have one of these beasts
+ * and can work out the answers!
+ *
+ * I/O ports are 0xb0 0xb2 and 0xb3
+ *
+ * More research on qd6580 being done by willmore@cig.mot.com (David)
+ *	-- this is apparently a *dual* IDE interface
+ */
+
+static void tune_qd6580 (ide_drive_t *drive, byte pio)
+{
+	unsigned long flags;
+
+	pio = ide_get_best_pio_mode(drive, pio, 3, NULL);
+
+	save_flags(flags);	/* all CPUs */
+	cli();			/* all CPUs */
+	outb_p(0x8d,0xb0);
+	outb_p(0x0 ,0xb2);
+	outb_p(((pio+1)<<4)|0x0f,0xb3);
+	inb(0x3f6);
+	restore_flags(flags);	/* all CPUs */
+}
+
+void __init init_qd6580 (void)
+{
+	ide_hwifs[0].chipset = ide_qd6580;
+	ide_hwifs[1].chipset = ide_qd6580;
+	ide_hwifs[0].tuneproc = &tune_qd6580;
+	ide_hwifs[0].mate = &ide_hwifs[1];
+	ide_hwifs[1].mate = &ide_hwifs[0];
+	ide_hwifs[1].channel = 1;
+}