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/*
* Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
*
* Original author:
* Ben Collins <bcollins@ubuntu.com>
*
* Additional work by:
* John Brooks <john.brooks@bluecherry.net>
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include "solo6x10.h"
static void solo_gpio_mode(struct solo_dev *solo_dev,
unsigned int port_mask, unsigned int mode)
{
int port;
unsigned int ret;
ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
/* To set gpio */
for (port = 0; port < 16; port++) {
if (!((1 << port) & port_mask))
continue;
ret &= (~(3 << (port << 1)));
ret |= ((mode & 3) << (port << 1));
}
solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
/* To set extended gpio - sensor */
ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
for (port = 0; port < 16; port++) {
if (!((1 << (port + 16)) & port_mask))
continue;
if (!mode)
ret &= ~(1 << port);
else
ret |= 1 << port;
}
solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
}
static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
{
solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
}
static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
{
solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
}
static void solo_gpio_config(struct solo_dev *solo_dev)
{
/* Video reset */
solo_gpio_mode(solo_dev, 0x30, 1);
solo_gpio_clear(solo_dev, 0x30);
udelay(100);
solo_gpio_set(solo_dev, 0x30);
udelay(100);
/* Warning: Don't touch the next line unless you're sure of what
* you're doing: first four gpio [0-3] are used for video. */
solo_gpio_mode(solo_dev, 0x0f, 2);
/* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
solo_gpio_mode(solo_dev, 0xff00, 1);
/* Initially set relay status to 0 */
solo_gpio_clear(solo_dev, 0xff00);
}
int solo_gpio_init(struct solo_dev *solo_dev)
{
solo_gpio_config(solo_dev);
return 0;
}
void solo_gpio_exit(struct solo_dev *solo_dev)
{
solo_gpio_clear(solo_dev, 0x30);
solo_gpio_config(solo_dev);
}
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