1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/ide/legacy/ide-4drives.c b/drivers/ide/legacy/ide-4drives.c
new file mode 100644
index 000000000000..ecae916a3385
--- /dev/null
+++ b/drivers/ide/legacy/ide-4drives.c
@@ -0,0 +1,72 @@
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+#define DRV_NAME "ide-4drives"
+
+static int probe_4drives;
+
+module_param_named(probe, probe_4drives, bool, 0);
+MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
+
+static int __init ide_4drives_init(void)
+{
+	ide_hwif_t *hwif, *mate;
+	unsigned long base = 0x1f0, ctl = 0x3f6;
+	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+	hw_regs_t hw;
+
+	if (probe_4drives == 0)
+		return -ENODEV;
+
+	if (!request_region(base, 8, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				DRV_NAME, base, base + 7);
+		return -EBUSY;
+	}
+
+	if (!request_region(ctl, 1, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+				DRV_NAME, ctl);
+		release_region(base, 8);
+		return -EBUSY;
+	}
+
+	memset(&hw, 0, sizeof(hw));
+
+	ide_std_init_ports(&hw, base, ctl);
+	hw.irq = 14;
+	hw.chipset = ide_4drives;
+
+	hwif = ide_find_port();
+	if (hwif) {
+		ide_init_port_hw(hwif, &hw);
+		idx[0] = hwif->index;
+	}
+
+	mate = ide_find_port();
+	if (mate) {
+		ide_init_port_hw(mate, &hw);
+		mate->drives[0].select.all ^= 0x20;
+		mate->drives[1].select.all ^= 0x20;
+		idx[1] = mate->index;
+
+		if (hwif) {
+			hwif->mate = mate;
+			mate->mate = hwif;
+			hwif->serialized = mate->serialized = 1;
+		}
+	}
+
+	ide_device_add(idx, NULL);
+
+	return 0;
+}
+
+module_init(ide_4drives_init);
+
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
+MODULE_LICENSE("GPL");