91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
|
|
* linux/arch/arm/mach-integrator/leds.c
|
|
*
|
|
* Integrator/AP and Integrator/CP LED control routines
|
|
*
|
|
* Copyright (C) 1999 ARM Limited
|
|
* Copyright (C) 2000 Deep Blue Solutions Ltd
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/leds.h>
|
|
#include <asm/system.h>
|
|
#include <asm/mach-types.h>
|
|
#include <mach/cm.h>
|
|
|
|
static int saved_leds;
|
|
|
|
static void integrator_leds_event(led_event_t ledevt)
|
|
{
|
|
unsigned long flags;
|
|
const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE);
|
|
unsigned int update_alpha_leds;
|
|
|
|
// yup, change the LEDs
|
|
local_irq_save(flags);
|
|
update_alpha_leds = 0;
|
|
|
|
switch(ledevt) {
|
|
case led_idle_start:
|
|
cm_control(CM_CTRL_LED, 0);
|
|
break;
|
|
|
|
case led_idle_end:
|
|
cm_control(CM_CTRL_LED, CM_CTRL_LED);
|
|
break;
|
|
|
|
case led_timer:
|
|
saved_leds ^= GREEN_LED;
|
|
update_alpha_leds = 1;
|
|
break;
|
|
|
|
case led_red_on:
|
|
saved_leds |= RED_LED;
|
|
update_alpha_leds = 1;
|
|
break;
|
|
|
|
case led_red_off:
|
|
saved_leds &= ~RED_LED;
|
|
update_alpha_leds = 1;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (update_alpha_leds) {
|
|
while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1);
|
|
__raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET);
|
|
}
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static int __init leds_init(void)
|
|
{
|
|
if (machine_is_integrator() || machine_is_cintegrator())
|
|
leds_event = integrator_leds_event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
core_initcall(leds_init);
|