/*
 * scx200_gpio_ledpulse.c
 *
 * Driver for pulsating LEDS on scx200_gpio mapped to onboard or external
 * light emitting diodes.
 *
 * Copyright (C) 2005 Shane Spencer <shane@bogomip.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License version 2 as published by the Free Software Foundation.
 *
 * 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 021110-1307, USA.
 */


#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/scx200_gpio.h>

MODULE_AUTHOR("Shane Spencer <shane@bogomip.com>");
MODULE_DESCRIPTION("Modulates a sine wave patter acrossed detected/defined LED's on scx200_gpio pins, accepts speed adjustmends per LED");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.1");

#include "scx200_gpio_ledpulse.h"

static void ledpulse_fire(unsigned long);

static struct timer_list ledpulse_ticktock =
  TIMER_INITIALIZER(ledpulse_fire, 0, 0);

typedef struct
{
   long ds_integrator1;
   long ds_integrator2;
   unsigned int ds_output;
   unsigned char intensity;
   unsigned char active;
   unsigned char gpio_pin;
   unsigned char state;
   unsigned char original_state;
   unsigned short int position;
} led_t;

static led_t led[32];

static void ledpulse_fire(unsigned long data)
{
   unsigned int i;

   for(i=0;i<32;i++)
     {
        if(led[i].active)
          {
             led[i].position = led[i].position + led[i].intensity;
             led[i].position = led[i].position % pattern_mask;

             led[i].ds_integrator1 += pattern[led[i].position] - led[i].ds_output;
             led[i].ds_integrator2 += led[i].ds_integrator1 - led[i].ds_output;
             led[i].ds_output = (led[i].ds_integrator2 & 0x8000) ? 0xFFFF : 0x0000;

             led[i].state = !led[i].ds_output;

             printk("Ledpulse: LED %d PATTERNMASK %d POSITION %d DATA %d STATE %d2\n", i, pattern_mask, led[i].position, pattern[led[i].position], led[i].state);
             //scx200_gpio_set(3, led[i].state);
          }

     }


   mod_timer(&ledpulse_ticktock, jiffies + (HZ/50));
   printk("Ledpulse: Cycled.\n");
}


static int __init ledpulse_init(void)
{
   printk("Ledpulse: Started scx200 gpio LED pulsation.\n");
   printk("Ledpulse: Array Test %d\n", sizeof(led));
   led[0].active = 1;
   led[0].intensity = 1;
   mod_timer(&ledpulse_ticktock, jiffies + (HZ));
   return 0;
}


static void __exit ledpulse_exit(void)
{
   del_timer_sync(&ledpulse_ticktock);
   printk("Ledpulse: Stopped scx200 gpio LED pulsation, LED state restored.\n");
}

module_init(ledpulse_init);
module_exit(ledpulse_exit);