1 files changed, 50 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..ecd7f3553554
--- /dev/null
+++ b/drivers/ide/legacy/ide-4drives.c
@@ -0,0 +1,50 @@
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+int probe_4drives = 0;
+
+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;
+	u8 idx[4] = { 0, 1, 0xff, 0xff };
+	hw_regs_t hw;
+
+	if (probe_4drives == 0)
+		return -ENODEV;
+
+	hwif = &ide_hwifs[0];
+	mate = &ide_hwifs[1];
+
+	memset(&hw, 0, sizeof(hw));
+
+	ide_std_init_ports(&hw, 0x1f0, 0x3f6);
+	hw.irq = 14;
+	hw.chipset = ide_4drives;
+
+	ide_init_port_hw(hwif, &hw);
+	ide_init_port_hw(mate, &hw);
+
+	mate->drives[0].select.all ^= 0x20;
+	mate->drives[1].select.all ^= 0x20;
+
+	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");