patch-2.4.21 linux-2.4.21/drivers/ide/pci/rz1000.c

• Lines: 100
• Date: 2003-06-13 07:51:33.000000000 -0700
• Orig file: linux-2.4.20/drivers/ide/pci/rz1000.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/ide/pci/rz1000.c linux-2.4.21/drivers/ide/pci/rz1000.c
@@ -0,0 +1,99 @@
+/*
+ *  linux/drivers/ide/pci/rz1000.c	Version 0.06	January 12, 2003
+ *
+ *  Copyright (C) 1995-1998  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Principal Author:  mlord@pobox.com (Mark Lord)
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ *  This file provides support for disabling the buggy read-ahead
+ *  mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
+ *
+ *  Dunno if this fixes both ports, or only the primary port (?).
+ */
+
+#undef REALLY_SLOW_IO		/* most systems can safely undef this */
+
+#include <linux/config.h> /* for CONFIG_BLK_DEV_IDEPCI */
+#include <linux/types.h>
+#include <linux/module.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/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#include "rz1000.h"
+
+static void __init init_hwif_rz1000 (ide_hwif_t *hwif)
+{
+	u16 reg;
+	struct pci_dev *dev = hwif->pci_dev;
+
+	hwif->chipset = ide_rz1000;
+	if (!pci_read_config_word (dev, 0x40, &reg) &&
+	    !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
+		printk(KERN_INFO "%s: disabled chipset read-ahead "
+			"(buggy RZ1000/RZ1001)\n", hwif->name);
+	} else {
+		hwif->serialized = 1;
+		hwif->drives[0].no_unmask = 1;
+		hwif->drives[1].no_unmask = 1;
+		printk(KERN_INFO "%s: serialized, disabled unmasking "
+			"(buggy RZ1000/RZ1001)\n", hwif->name);
+	}
+}
+
+extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
+
+static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	ide_pci_device_t *d = &rz1000_chipsets[id->driver_data];
+	if (dev->device != d->device)
+		BUG();
+	ide_setup_pci_device(dev, d);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static struct pci_device_id rz1000_pci_tbl[] __devinitdata = {
+	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ 0, },
+};
+
+static struct pci_driver driver = {
+	.name		= "RZ1000 IDE",
+	.id_table	= rz1000_pci_tbl,
+	.probe		= rz1000_init_one,
+};
+
+static int rz1000_ide_init(void)
+{
+	return ide_pci_register_driver(&driver);
+}
+
+static void rz1000_ide_exit(void)
+{
+	ide_pci_unregister_driver(&driver);
+}
+
+module_init(rz1000_ide_init);
+module_exit(rz1000_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
+MODULE_LICENSE("GPL");
+
+EXPORT_NO_SYMBOLS;
+