106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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/*
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* Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
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*
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* Original author:
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* Ben Collins <bcollins@ubuntu.com>
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*
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* Additional work by:
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* John Brooks <john.brooks@bluecherry.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/delay.h>
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#include <linux/uaccess.h>
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#include "solo6x10.h"
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static void solo_gpio_mode(struct solo_dev *solo_dev,
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unsigned int port_mask, unsigned int mode)
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{
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int port;
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unsigned int ret;
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ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
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/* To set gpio */
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for (port = 0; port < 16; port++) {
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if (!((1 << port) & port_mask))
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continue;
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ret &= (~(3 << (port << 1)));
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ret |= ((mode & 3) << (port << 1));
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}
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solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
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/* To set extended gpio - sensor */
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ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
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for (port = 0; port < 16; port++) {
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if (!((1 << (port + 16)) & port_mask))
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continue;
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if (!mode)
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ret &= ~(1 << port);
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else
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ret |= 1 << port;
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}
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solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
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}
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static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
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{
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solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
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solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
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}
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static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
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{
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solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
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solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
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}
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static void solo_gpio_config(struct solo_dev *solo_dev)
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{
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/* Video reset */
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solo_gpio_mode(solo_dev, 0x30, 1);
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solo_gpio_clear(solo_dev, 0x30);
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udelay(100);
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solo_gpio_set(solo_dev, 0x30);
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udelay(100);
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/* Warning: Don't touch the next line unless you're sure of what
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* you're doing: first four gpio [0-3] are used for video. */
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solo_gpio_mode(solo_dev, 0x0f, 2);
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/* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
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solo_gpio_mode(solo_dev, 0xff00, 1);
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/* Initially set relay status to 0 */
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solo_gpio_clear(solo_dev, 0xff00);
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}
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int solo_gpio_init(struct solo_dev *solo_dev)
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{
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solo_gpio_config(solo_dev);
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return 0;
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}
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void solo_gpio_exit(struct solo_dev *solo_dev)
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{
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solo_gpio_clear(solo_dev, 0x30);
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solo_gpio_config(solo_dev);
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}
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