/*
   *  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 <mach/platform.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);