Merge tag 'v2.6.37' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / mn10300 / unit-asb2364 / leds.c

diff --git a/arch/mn10300/unit-asb2364/leds.c b/arch/mn10300/unit-asb2364/leds.c
new file mode 100644 (file)
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--- /dev/null
+++ b/arch/mn10300/unit-asb2364/leds.c
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+/* leds.c: ASB2364 peripheral 7seg LEDs x4 support
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/intctl-regs.h>
+#include <asm/rtc-regs.h>
+#include <unit/leds.h>
+
+#if MN10300_USE_7SEGLEDS
+static const u8 asb2364_led_hex_tbl[16] = {
+       0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
+       0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
+};
+
+static const u32 asb2364_led_chase_tbl[6] = {
+       ~0x02020202,    /* top          - segA */
+       ~0x04040404,    /* right top    - segB */
+       ~0x08080808,    /* right bottom - segC */
+       ~0x10101010,    /* bottom       - segD */
+       ~0x20202020,    /* left bottom  - segE */
+       ~0x40404040,    /* left top     - segF */
+};
+
+static unsigned asb2364_led_chase;
+
+void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
+{
+       u32 leds;
+
+       leds = asb2364_led_hex_tbl[(val/1000) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[(val/100) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[(val/10) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[val % 10];
+       leds |= points^0x01010101;
+
+       ASB2364_7SEGLEDS = leds;
+}
+
+void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
+{
+       u32 leds;
+
+       leds = asb2364_led_hex_tbl[(val/1000) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[(val/100) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[(val/10) % 10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[val % 10];
+       leds |= points^0x01010101;
+
+       ASB2364_7SEGLEDS = leds;
+}
+
+/* display triple horizontal bar and exception code */
+void peripheral_leds_display_exception(enum exception_code code)
+{
+       u32 leds;
+
+       leds = asb2364_led_hex_tbl[(code/0x100) % 0x10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10];
+       leds <<= 8;
+       leds |= asb2364_led_hex_tbl[code % 0x10];
+       leds |= 0x6d010101;
+
+       ASB2364_7SEGLEDS = leds;
+}
+
+void peripheral_leds_led_chase(void)
+{
+       ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase];
+       asb2364_led_chase++;
+       if (asb2364_led_chase >= 6)
+               asb2364_led_chase = 0;
+}
+#else  /* MN10300_USE_7SEGLEDS */
+void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { }
+void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { }
+void peripheral_leds_display_exception(enum exception_code code) { }
+void peripheral_leds_led_chase(void) { }
+#endif /* MN10300_USE_7SEGLEDS */