patch-1.3.63 linux/drivers/block/dtc2278.c
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- Lines: 100
- Date:
Mon Feb 12 07:04:02 1996
- Orig file:
v1.3.62/linux/drivers/block/dtc2278.c
- Orig date:
Fri Feb 9 17:53:00 1996
diff -u --recursive --new-file v1.3.62/linux/drivers/block/dtc2278.c linux/drivers/block/dtc2278.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/block/dtc2278.c Version 0.01 Feb 06, 1996
+ * linux/drivers/block/dtc2278.c Version 0.02 Feb 10, 1996
*
* Copyright (C) 1996 Linus Torvalds & author (see below)
*/
@@ -16,6 +16,12 @@
#include <linux/hdreg.h>
#include <asm/io.h>
#include "ide.h"
+#include "ide_modes.h"
+
+/*
+ * Changing this #undef to #define may solve start up problems in some systems.
+ */
+#undef ALWAYS_SET_DTC2278_PIO_MODE
/*
* From: andy@cercle.cts.com (Dyan Wile)
@@ -27,9 +33,9 @@
* /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
* filesystem corrupted with -u1, but under heavy disk load only :-)
*
- * From: mlord@bnr.ca -- this chipset is now forced to use the "serialize" feature,
- * which hopefully will make it more reliable to use.. maybe it has the same bugs
- * as the CMD640B and RZ1000 ??
+ * This chipset is now forced to use the "serialize" feature,
+ * and irq-unmasking is disallowed. If io_32bit is enabled,
+ * it must be done for BOTH drives on each interface.
*/
static void sub22 (char b, char c)
@@ -50,24 +56,31 @@
}
}
-static void tune_dtc2278 (ide_drive_t *drive, byte pio_mode)
+static void tune_dtc2278 (ide_drive_t *drive, byte pio)
{
unsigned long flags;
- if (pio_mode != 255) { /* auto-tune not yet supported here */
- if (pio_mode >= 3) {
- save_flags(flags);
- cli();
- /*
- * This enables PIO mode4 (3?) on the first interface
- */
- sub22(1,0xc3);
- sub22(0,0xa0);
- restore_flags(flags);
- } else {
- /* we don't know how to set it back again.. */
- }
+ if (pio == 255)
+ pio = ide_get_best_pio_mode(drive);
+
+ if (pio >= 3) {
+ save_flags(flags);
+ cli();
+ /*
+ * This enables PIO mode4 (3?) on the first interface
+ */
+ sub22(1,0xc3);
+ sub22(0,0xa0);
+ restore_flags(flags);
+ } else {
+ /* we don't know how to set it back again.. */
}
+
+ /*
+ * 32bit I/O has to be enabled for *both* drives at the same time.
+ */
+ drive->io_32bit = 1;
+ HWIF(drive)->drives[!drive->select.b.unit].io_32bit = 1;
}
void init_dtc2278 (void)
@@ -83,10 +96,20 @@
inb(0x3f6);
outb_p(0x20,0xb4);
inb(0x3f6);
+#ifdef ALWAYS_SET_DTC2278_PIO_MODE
+ /*
+ * This enables PIO mode4 (3?) on the first interface
+ * and may solve start-up problems for some people.
+ */
+ sub22(1,0xc3);
+ sub22(0,0xa0);
+#endif
restore_flags(flags);
ide_hwifs[0].serialized = 1;
ide_hwifs[0].chipset = ide_dtc2278;
ide_hwifs[1].chipset = ide_dtc2278;
ide_hwifs[0].tuneproc = &tune_dtc2278;
+ ide_hwifs[0].no_unmask = 1;
+ ide_hwifs[1].no_unmask = 1;
}
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TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this