1/*
2 *  linux/arch/arm/mach-integrator/leds.c
3 *
4 *  Integrator/AP and Integrator/CP LED control routines
5 *
6 *  Copyright (C) 1999 ARM Limited
7 *  Copyright (C) 2000 Deep Blue Solutions Ltd
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22 */
23#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/smp.h>
26#include <linux/spinlock.h>
27#include <linux/io.h>
28
29#include <mach/hardware.h>
30#include <mach/platform.h>
31#include <asm/leds.h>
32#include <asm/mach-types.h>
33#include <mach/cm.h>
34
35static int saved_leds;
36
37static void integrator_leds_event(led_event_t ledevt)
38{
39	unsigned long flags;
40	const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE);
41	unsigned int update_alpha_leds;
42
43	// yup, change the LEDs
44	local_irq_save(flags);
45	update_alpha_leds = 0;
46
47	switch(ledevt) {
48	case led_idle_start:
49		cm_control(CM_CTRL_LED, 0);
50		break;
51
52	case led_idle_end:
53		cm_control(CM_CTRL_LED, CM_CTRL_LED);
54		break;
55
56	case led_timer:
57		saved_leds ^= GREEN_LED;
58		update_alpha_leds = 1;
59		break;
60
61	case led_red_on:
62		saved_leds |= RED_LED;
63		update_alpha_leds = 1;
64		break;
65
66	case led_red_off:
67		saved_leds &= ~RED_LED;
68		update_alpha_leds = 1;
69		break;
70
71	default:
72		break;
73	}
74
75	if (update_alpha_leds) {
76		while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1);
77		__raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET);
78	}
79	local_irq_restore(flags);
80}
81
82static int __init leds_init(void)
83{
84	if (machine_is_integrator() || machine_is_cintegrator())
85		leds_event = integrator_leds_event;
86
87	return 0;
88}
89
90core_initcall(leds_init);
91