From 49c21305453528ec5066b90e40e3f83a2e2f4c7b Mon Sep 17 00:00:00 2001
From: bunnie <bunnie@kosagi.com>
Date: Mon, 15 Sep 2014 04:57:19 +0000
Subject: [PATCH] add LED control function

Command-line to turn LEDs on the board on or off.

Also, modified .gitignore to be emacs-friendly.
---
 .gitignore             |  1 +
 Makefile               |  1 +
 cmd-led.c              | 27 +++++++++++++++++++++++++++
 include/fernvale-kbd.h | 14 ++++++++++++++
 main.c                 |  6 ++++++
 5 files changed, 49 insertions(+)
 create mode 100644 cmd-led.c
 create mode 100644 include/fernvale-kbd.h

diff --git a/.gitignore b/.gitignore
index 86fef77..a57153e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /build
 *.swp
 *.swo
+*~
diff --git a/Makefile b/Makefile
index e3087be..09f1230 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ SRC_C = \
 	cmd-reboot.c \
 	cmd-sleep.c \
 	cmd-spi.c \
+	cmd-led.c \
 	emi.c \
 	irq.c \
 	main.c \
diff --git a/cmd-led.c b/cmd-led.c
new file mode 100644
index 0000000..fd6ad4b
--- /dev/null
+++ b/cmd-led.c
@@ -0,0 +1,27 @@
+#include <string.h>
+#include "bionic.h"
+#include "memio.h"
+#include "printf.h"
+#include "serial.h"
+#include "fernvale-kbd.h"
+
+int cmd_led(int argc, char **argv)
+{
+	uint32_t state;
+
+	if (argc < 1) {
+		printf("Usage: led [1 = on, 0 = off]\n");
+		return -1;
+	}
+
+	state = _strtoul(argv[0], NULL, 0);
+
+	if( state ) {
+	  *((volatile uint32_t *) BIG_LED_ADDR) = BIG_LED_ON;
+	} else {
+	  *((volatile uint32_t *) BIG_LED_ADDR) = BIG_LED_OFF;
+	}
+
+	return 0;
+}
+
diff --git a/include/fernvale-kbd.h b/include/fernvale-kbd.h
new file mode 100644
index 0000000..b087eb6
--- /dev/null
+++ b/include/fernvale-kbd.h
@@ -0,0 +1,14 @@
+#ifndef __FV_KBD_H__
+#define __FV_KBD_H__
+
+/// The BIG_LED is a 60mA drive-capable open-drain switch
+/// it's useful for driving circuits such as an array of LEDs
+/// used to illuminate a keyboard, hence its inclusion in the
+/// keyboard section. However, on PCBs with no keyboard, it's
+/// simply a big LED driver.
+
+#define BIG_LED_ADDR  (0xA0700000 + 0x0C80)
+#define BIG_LED_ON    (0x3)
+#define BIG_LED_OFF   (0x0)
+
+#endif /* __FV_KBD_H__ */
diff --git a/main.c b/main.c
index 2d54698..ccc3b88 100644
--- a/main.c
+++ b/main.c
@@ -339,6 +339,7 @@ extern int cmd_poke(int argc, char **argv);
 extern int cmd_spi(int argc, char **argv);
 extern int cmd_swi(int argc, char **argv);
 extern int cmd_reboot(int argc, char **argv);
+extern int cmd_led(int argc, char **argv);
 
 static const struct {
 	int (*func)(int argc, char **argv);
@@ -390,6 +391,11 @@ static const struct {
 		.name = "swi",
 		.help = "Generate software interrupt",
 	},
+	{
+		.func = cmd_led,
+		.name = "led",
+		.help = "Turn the on-board LED on or off",
+	},
 };
 
 int cmd_help(int argc, char **argv)