patch-2.4.21 linux-2.4.21/drivers/ide/legacy/dtc2278.c
Next file: linux-2.4.21/drivers/ide/legacy/falconide.c
Previous file: linux-2.4.21/drivers/ide/legacy/buddha.c
Back to the patch index
Back to the overall index
- Lines: 204
- Date:
2003-06-13 07:51:33.000000000 -0700
- Orig file:
linux-2.4.20/drivers/ide/legacy/dtc2278.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/ide/legacy/dtc2278.c linux-2.4.21/drivers/ide/legacy/dtc2278.c
@@ -0,0 +1,203 @@
+/*
+ * linux/drivers/ide/legacy/dtc2278.c Version 0.02 Feb 10, 1996
+ *
+ * Copyright (C) 1996 Linus Torvalds & author (see below)
+ */
+
+#undef REALLY_SLOW_IO /* most systems can safely undef this */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#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 <linux/init.h>
+
+#include <asm/io.h>
+
+#ifdef CONFIG_BLK_DEV_DTC2278_MODULE
+# define _IDE_C
+# include "ide_modes.h"
+# undef _IDE_C
+#else
+# include "ide_modes.h"
+#endif /* CONFIG_BLK_DEV_DTC2278_MODULE */
+
+/*
+ * 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)
+ *
+ * Below is a patch for DTC-2278 - alike software-programmable controllers
+ * The code enables the secondary IDE controller and the PIO4 (3?) timings on
+ * the primary (EIDE). You may probably have to enable the 32-bit support to
+ * get the full speed. You better get the disk interrupts disabled ( hdparm -u0
+ * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
+ * filesystem corrupted with -u1, but under heavy disk load only :-)
+ *
+ * This card 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.
+ *
+ * This code was written for the DTC2278E, but might work with any of these:
+ *
+ * DTC2278S has only a single IDE interface.
+ * DTC2278D has two IDE interfaces and is otherwise identical to the S version.
+ * DTC2278E also has serial ports and a printer port
+ * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
+ *
+ * There may be a fourth controller type. The S and D versions use the
+ * Winbond chip, and I think the E version does also.
+ *
+ */
+
+static void sub22 (char b, char c)
+{
+ int i;
+
+ for(i = 0; i < 3; ++i) {
+ inb(0x3f6);
+ outb_p(b,0xb0);
+ inb(0x3f6);
+ outb_p(c,0xb4);
+ inb(0x3f6);
+ if(inb(0xb4) == c) {
+ outb_p(7,0xb0);
+ inb(0x3f6);
+ return; /* success */
+ }
+ }
+}
+
+static void tune_dtc2278 (ide_drive_t *drive, u8 pio)
+{
+ unsigned long flags;
+
+ pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
+
+ if (pio >= 3) {
+ spin_lock_irqsave(&io_request_lock, flags);
+ /*
+ * This enables PIO mode4 (3?) on the first interface
+ */
+ sub22(1,0xc3);
+ sub22(0,0xa0);
+ spin_unlock_irqrestore(&io_request_lock, 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 probe_dtc2278 (void)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ /*
+ * This enables the second interface
+ */
+ outb_p(4,0xb0);
+ 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
+ local_irq_restore(flags);
+
+ ide_hwifs[0].serialized = 1;
+ ide_hwifs[1].serialized = 1;
+ ide_hwifs[0].chipset = ide_dtc2278;
+ ide_hwifs[1].chipset = ide_dtc2278;
+ ide_hwifs[0].tuneproc = &tune_dtc2278;
+ ide_hwifs[0].drives[0].no_unmask = 1;
+ ide_hwifs[0].drives[1].no_unmask = 1;
+ ide_hwifs[1].drives[0].no_unmask = 1;
+ ide_hwifs[1].drives[1].no_unmask = 1;
+ ide_hwifs[0].mate = &ide_hwifs[1];
+ ide_hwifs[1].mate = &ide_hwifs[0];
+ ide_hwifs[1].channel = 1;
+
+#ifndef HWIF_PROBE_CLASSIC_METHOD
+ probe_hwif_init(&ide_hwifs[0]);
+ probe_hwif_init(&ide_hwifs[1]);
+#endif /* HWIF_PROBE_CLASSIC_METHOD */
+
+}
+
+void __init dtc2278_release (void)
+{
+ if (ide_hwifs[0].chipset != ide_dtc2278 &&
+ ide_hwifs[1].chipset != ide_dtc2278)
+ return;
+
+ ide_hwifs[0].serialized = 0;
+ ide_hwifs[1].serialized = 0;
+ ide_hwifs[0].chipset = ide_unknown;
+ ide_hwifs[1].chipset = ide_unknown;
+ ide_hwifs[0].tuneproc = NULL;
+ ide_hwifs[0].drives[0].no_unmask = 0;
+ ide_hwifs[0].drives[1].no_unmask = 0;
+ ide_hwifs[1].drives[0].no_unmask = 0;
+ ide_hwifs[1].drives[1].no_unmask = 0;
+ ide_hwifs[0].mate = NULL;
+ ide_hwifs[1].mate = NULL;
+}
+
+#ifndef MODULE
+/*
+ * init_dtc2278:
+ *
+ * called by ide.c when parsing command line
+ */
+
+void __init init_dtc2278 (void)
+{
+ probe_dtc2278();
+}
+
+#else
+
+MODULE_AUTHOR("See Local File");
+MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
+MODULE_LICENSE("GPL");
+
+int __init dtc2278_mod_init(void)
+{
+ probe_dtc2278();
+ if (ide_hwifs[0].chipset != ide_dtc2278 &&
+ ide_hwifs[1].chipset != ide_dtc2278) {
+ dtc2278_release();
+ return -ENODEV;
+ }
+ return 0;
+}
+module_init(dtc2278_mod_init);
+
+void __init dtc2278_mod_exit(void)
+{
+ dtc2278_release();
+}
+module_exit(dtc2278_mod_exit);
+#endif
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)