1 files changed, 72 insertions, 0 deletions
diff --git a/arch/arm26/machine/latches.c b/arch/arm26/machine/latches.c
new file mode 100644
index 00000000000..94f05d2a3b2
--- /dev/null
+++ b/arch/arm26/machine/latches.c
@@ -0,0 +1,72 @@
+/*
+ *  linux/arch/arm26/kernel/latches.c
+ *
+ *  Copyright (C) David Alan Gilbert 1995/1996,2000
+ *  Copyright (C) Ian Molton 2003
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Support for the latches on the old Archimedes which control the floppy,
+ *  hard disc and printer
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/oldlatches.h>
+
+static unsigned char latch_a_copy;
+static unsigned char latch_b_copy;
+
+/* newval=(oldval & ~mask)|newdata */
+void oldlatch_aupdate(unsigned char mask,unsigned char newdata)
+{
+	unsigned long flags;
+
+	BUG_ON(!machine_is_archimedes());
+
+	local_irq_save(flags); //FIXME: was local_save_flags
+	latch_a_copy = (latch_a_copy & ~mask) | newdata;
+	__raw_writeb(latch_a_copy, LATCHA_BASE);
+	local_irq_restore(flags);
+
+	printk("Latch: A = 0x%02x\n", latch_a_copy);
+}
+
+
+/* newval=(oldval & ~mask)|newdata */
+void oldlatch_bupdate(unsigned char mask,unsigned char newdata)
+{
+	unsigned long flags;
+
+	BUG_ON(!machine_is_archimedes());
+
+
+	local_irq_save(flags);//FIXME: was local_save_flags
+	latch_b_copy = (latch_b_copy & ~mask) | newdata;
+	__raw_writeb(latch_b_copy, LATCHB_BASE);
+	local_irq_restore(flags);
+
+	printk("Latch: B = 0x%02x\n", latch_b_copy);
+}
+
+static int __init oldlatch_init(void)
+{
+	if (machine_is_archimedes()) {
+		oldlatch_aupdate(0xff, 0xff);
+		/* Thats no FDC reset...*/
+		oldlatch_bupdate(0xff, LATCHB_FDCRESET);
+	}
+	return 0;
+}
+
+arch_initcall(oldlatch_init);
+
+EXPORT_SYMBOL(oldlatch_aupdate);
+EXPORT_SYMBOL(oldlatch_bupdate);