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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm26/machine/latches.c
downloadlinux-2.6.34-ux500-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm26/machine/latches.c')
-rw-r--r--arch/arm26/machine/latches.c72
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);