/*
 * ADC subsystem, sysfs interface
 *
 * Copyright (C) 2013-10 
 * Author: Davied <apple_guet@126.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.
 */
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/adc-core.h>


#ifdef CONFIG_ADC_PROC_DEBUG
#define DBG(msg...) do { \
		printk(KERN_INFO msg); \
	} while (0)
#else
#define DBG(msg...)	do { } while(0)
#endif


static int adc_proc_show(struct seq_file *seq, void *offset)
{
	int result = 0;
	struct adc_core_dev *adc = seq->private;
	
	result = adc->ops->convert(CMD_AD_CON_PBAT);
	seq_printf(seq, "PBAT:%d\n", result);
	result = adc->ops->convert(CMD_AD_CON_CH0);
	seq_printf(seq, "CH0:%d\n", result);
	result = adc->ops->convert(CMD_AD_CON_CH1);
	seq_printf(seq, "CH1:%d\n", result);
	result = adc->ops->convert(CMD_AD_CON_CH2);
	seq_printf(seq, "CH2:%d\n", result);
	result = adc->ops->convert(CMD_AD_CON_CH3);
	seq_printf(seq, "CH3:%d\n", result);
	if (adc->ops->proc)
		adc->ops->proc(adc->dev.parent, seq);
	return 0;
}

static int adc_proc_open(struct inode *inode, struct file *file)
{
	int ret;
	struct adc_core_dev *adc = PDE(inode)->data;

	if (!try_module_get(THIS_MODULE)) {
		DBG("!!!!!!try_module_get error!!!!!!\n");
		return -ENODEV;
	}
	ret = single_open(file, adc_proc_show, adc);
	if (ret)
		module_put(THIS_MODULE);
	return ret;
}

static int adc_proc_release(struct inode *inode, struct file *file)
{
	int res = single_release(inode, file);
	module_put(THIS_MODULE);
	return res;
}

static const struct file_operations adc_proc_fops = {
	.open	= adc_proc_open,
	.read	= seq_read,
	.llseek	= seq_lseek,
	.release	= adc_proc_release,
};

void adc_proc_add_device(struct adc_core_dev *adc)
{
	if (adc->id == 0)
		proc_create_data("driver/adc", 0, NULL, &adc_proc_fops, adc);
}

void adc_proc_del_device(struct adc_core_dev *adc)
{
	if (adc->id == 0)
		remove_proc_entry("driver/adc", NULL);
}