OpenCloudOS-Kernel/drivers/media/pci/solo6x10/solo6x10-gpio.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 Based on 3 normalized pattern(s): 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-27 14:55:06 +08:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
#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 (!((1UL << (port + 16)) & port_mask))
continue;
if (!mode)
ret &= ~(1UL << port);
else
ret |= 1UL << port;
}
/* Enable GPIO[31:16] */
ret |= 0xffff0000;
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);
/* Set input pins direction */
solo_gpio_mode(solo_dev, 0xffff0000, 0);
}
#ifdef CONFIG_GPIOLIB
/* Pins 0-7 are not exported, because it seems from code above they are
* used for internal purposes. So offset 0 corresponds to pin 8, therefore
* offsets 0-7 are relay GPIOs, 8-23 - input GPIOs.
*/
static int solo_gpiochip_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
int ret, mode;
struct solo_dev *solo_dev = gpiochip_get_data(chip);
if (offset < 8) {
ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
mode = 3 & (ret >> ((offset + 8) * 2));
} else {
ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
mode = 1 & (ret >> (offset - 8));
}
if (!mode)
return 1;
else if (mode == 1)
return 0;
return -1;
}
static int solo_gpiochip_direction_input(struct gpio_chip *chip,
unsigned int offset)
{
return -1;
}
static int solo_gpiochip_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
return -1;
}
static int solo_gpiochip_get(struct gpio_chip *chip,
unsigned int offset)
{
int ret;
struct solo_dev *solo_dev = gpiochip_get_data(chip);
ret = solo_reg_read(solo_dev, SOLO_GPIO_DATA_IN);
return 1 & (ret >> (offset + 8));
}
static void solo_gpiochip_set(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct solo_dev *solo_dev = gpiochip_get_data(chip);
if (value)
solo_gpio_set(solo_dev, 1 << (offset + 8));
else
solo_gpio_clear(solo_dev, 1 << (offset + 8));
}
#endif
int solo_gpio_init(struct solo_dev *solo_dev)
{
#ifdef CONFIG_GPIOLIB
int ret;
#endif
solo_gpio_config(solo_dev);
#ifdef CONFIG_GPIOLIB
solo_dev->gpio_dev.label = SOLO6X10_NAME"_gpio";
solo_dev->gpio_dev.parent = &solo_dev->pdev->dev;
solo_dev->gpio_dev.owner = THIS_MODULE;
solo_dev->gpio_dev.base = -1;
solo_dev->gpio_dev.ngpio = 24;
solo_dev->gpio_dev.can_sleep = 0;
solo_dev->gpio_dev.get_direction = solo_gpiochip_get_direction;
solo_dev->gpio_dev.direction_input = solo_gpiochip_direction_input;
solo_dev->gpio_dev.direction_output = solo_gpiochip_direction_output;
solo_dev->gpio_dev.get = solo_gpiochip_get;
solo_dev->gpio_dev.set = solo_gpiochip_set;
ret = gpiochip_add_data(&solo_dev->gpio_dev, solo_dev);
if (ret) {
solo_dev->gpio_dev.label = NULL;
return -1;
}
#endif
return 0;
}
void solo_gpio_exit(struct solo_dev *solo_dev)
{
#ifdef CONFIG_GPIOLIB
if (solo_dev->gpio_dev.label) {
gpiochip_remove(&solo_dev->gpio_dev);
solo_dev->gpio_dev.label = NULL;
}
#endif
solo_gpio_clear(solo_dev, 0x30);
solo_gpio_config(solo_dev);
}