91 строка
2.2 KiB
C
91 строка
2.2 KiB
C
/*
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* linux/arch/arm/mach-integrator/leds.c
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*
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* Integrator/AP and Integrator/CP LED control routines
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*
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* Copyright (C) 1999 ARM Limited
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/spinlock.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/leds.h>
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#include <asm/system.h>
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#include <asm/mach-types.h>
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#include <asm/arch/cm.h>
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static int saved_leds;
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static void integrator_leds_event(led_event_t ledevt)
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{
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unsigned long flags;
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const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE);
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unsigned int update_alpha_leds;
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// yup, change the LEDs
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local_irq_save(flags);
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update_alpha_leds = 0;
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switch(ledevt) {
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case led_idle_start:
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cm_control(CM_CTRL_LED, 0);
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break;
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case led_idle_end:
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cm_control(CM_CTRL_LED, CM_CTRL_LED);
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break;
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case led_timer:
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saved_leds ^= GREEN_LED;
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update_alpha_leds = 1;
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break;
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case led_red_on:
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saved_leds |= RED_LED;
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update_alpha_leds = 1;
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break;
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case led_red_off:
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saved_leds &= ~RED_LED;
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update_alpha_leds = 1;
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break;
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default:
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break;
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}
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if (update_alpha_leds) {
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while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1);
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__raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET);
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}
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local_irq_restore(flags);
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}
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static int __init leds_init(void)
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{
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if (machine_is_integrator() || machine_is_cintegrator())
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leds_event = integrator_leds_event;
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return 0;
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}
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core_initcall(leds_init);
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