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