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/*
* Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <asm/uaccess.h>
#include <adm8668.h>
int adm8668_sesled_write_proc(struct file *file, const char *buffer, unsigned long count, void *data)
{
char buf[8];
int num;
num = (count < 8) ? count : 8;
if (copy_from_user(buf, buffer, num))
{
printk("copy_from_user failed");
return -EFAULT;
}
num = simple_strtoul(buf, NULL, 16);
switch (num)
{
case 0:
GPIO_SET_LOW(0);
CRGPIO_SET_LOW(2);
break;
case 1:
GPIO_SET_LOW(0);
CRGPIO_SET_HI(2);
break;
case 2:
GPIO_SET_HI(0);
CRGPIO_SET_HI(2);
break;
default:
break;
}
return count;
}
int adm8668_sesled_read_proc(char *buf, char **start, off_t offset, int count, int *eof, void *data)
{
int len = 0;
int led_state = 0;
led_state = (ADM8668_CONFIG_REG(CRGPIO_REG) & 0x100) ? 1 : 0;
led_state += (ADM8668_WLAN_REG(GPIO_REG) & 0x40) ? 2 : 0;
len += sprintf(buf+len, "%s\n",
(led_state&1) ?
((led_state&2) ? "ORANGE" : "GREEN") : "OFF");
return len;
}
int adm8668_button_read_proc(char *buf, char **start, off_t offset,
int count, int *eof, void *data)
{
int len = 0;
int read_once = ADM8668_CONFIG_REG(CRGPIO_REG);
int button_flip = (read_once >> 20) & 0x3;
int button_state = read_once & 0x3;
len += sprintf(buf+len, "SES: %s %s\nRESET: %s %s\n",
(button_state&2) ? "UP" : "DOWN",
(button_flip&2) ? "FLIP" : "",
(button_state&1) ? "UP" : "DOWN",
(button_flip&1) ? "FLIP" : "");
return len;
}
int __init adm8668_init_proc(void)
{
struct proc_dir_entry *adm8668_proc_dir = NULL;
struct proc_dir_entry *sesled = NULL;
int __maybe_unused bogus;
/* these are known to be lights. rest are input...? */
ADM8668_CONFIG_REG(CRGPIO_REG) = GPIO2_OUTPUT_ENABLE;
ADM8668_WLAN_REG(GPIO_REG) = GPIO0_OUTPUT_ENABLE;
/* inital read off of the flipper switcher on the button thingie */
bogus = ADM8668_CONFIG_REG(CRGPIO_REG);
adm8668_proc_dir = proc_mkdir("adm8668", 0);
if (adm8668_proc_dir == NULL) {
printk(KERN_ERR "ADM8668 proc: unable to create proc dir.\n");
return 0;
}
create_proc_read_entry("buttons", 0444, adm8668_proc_dir,
adm8668_button_read_proc, NULL);
sesled = create_proc_entry("sesled", S_IRUGO|S_IWUGO, adm8668_proc_dir);
if (sesled) {
sesled->read_proc = adm8668_sesled_read_proc;
sesled->write_proc = adm8668_sesled_write_proc;
}
return 0;
}
module_init(adm8668_init_proc);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Scott Nicholas <neutronscott@scottn.us>");
MODULE_DESCRIPTION("ADM8668 ghetto button driver");
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