2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
5 * Ben Collins <bcollins@ubuntu.com>
8 * John Brooks <john.brooks@bluecherry.net>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
21 #include <linux/kernel.h>
23 #include <linux/delay.h>
24 #include <linux/uaccess.h>
28 static void solo_gpio_mode(struct solo_dev *solo_dev,
29 unsigned int port_mask, unsigned int mode)
34 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
37 for (port = 0; port < 16; port++) {
38 if (!((1 << port) & port_mask))
41 ret &= (~(3 << (port << 1)));
42 ret |= ((mode & 3) << (port << 1));
45 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
47 /* To set extended gpio - sensor */
48 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
50 for (port = 0; port < 16; port++) {
51 if (!((1 << (port + 16)) & port_mask))
60 /* Enable GPIO[31:16] */
63 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
66 static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
68 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
69 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
72 static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
74 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
75 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
78 static void solo_gpio_config(struct solo_dev *solo_dev)
81 solo_gpio_mode(solo_dev, 0x30, 1);
82 solo_gpio_clear(solo_dev, 0x30);
84 solo_gpio_set(solo_dev, 0x30);
87 /* Warning: Don't touch the next line unless you're sure of what
88 * you're doing: first four gpio [0-3] are used for video. */
89 solo_gpio_mode(solo_dev, 0x0f, 2);
91 /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
92 solo_gpio_mode(solo_dev, 0xff00, 1);
94 /* Initially set relay status to 0 */
95 solo_gpio_clear(solo_dev, 0xff00);
97 /* Set input pins direction */
98 solo_gpio_mode(solo_dev, 0xffff0000, 0);
101 #ifdef CONFIG_GPIOLIB
102 /* Pins 0-7 are not exported, because it seems from code above they are
103 * used for internal purposes. So offset 0 corresponds to pin 8, therefore
104 * offsets 0-7 are relay GPIOs, 8-23 - input GPIOs.
106 static int solo_gpiochip_get_direction(struct gpio_chip *chip,
110 struct solo_dev *solo_dev = gpiochip_get_data(chip);
113 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
114 mode = 3 & (ret >> ((offset + 8) * 2));
116 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
117 mode = 1 & (ret >> (offset - 8));
128 static int solo_gpiochip_direction_input(struct gpio_chip *chip,
134 static int solo_gpiochip_direction_output(struct gpio_chip *chip,
135 unsigned int offset, int value)
140 static int solo_gpiochip_get(struct gpio_chip *chip,
144 struct solo_dev *solo_dev = gpiochip_get_data(chip);
146 ret = solo_reg_read(solo_dev, SOLO_GPIO_DATA_IN);
148 return 1 & (ret >> (offset + 8));
151 static void solo_gpiochip_set(struct gpio_chip *chip,
152 unsigned int offset, int value)
154 struct solo_dev *solo_dev = gpiochip_get_data(chip);
157 solo_gpio_set(solo_dev, 1 << (offset + 8));
159 solo_gpio_clear(solo_dev, 1 << (offset + 8));
163 int solo_gpio_init(struct solo_dev *solo_dev)
165 #ifdef CONFIG_GPIOLIB
169 solo_gpio_config(solo_dev);
170 #ifdef CONFIG_GPIOLIB
171 solo_dev->gpio_dev.label = SOLO6X10_NAME"_gpio";
172 solo_dev->gpio_dev.parent = &solo_dev->pdev->dev;
173 solo_dev->gpio_dev.owner = THIS_MODULE;
174 solo_dev->gpio_dev.base = -1;
175 solo_dev->gpio_dev.ngpio = 24;
176 solo_dev->gpio_dev.can_sleep = 0;
178 solo_dev->gpio_dev.get_direction = solo_gpiochip_get_direction;
179 solo_dev->gpio_dev.direction_input = solo_gpiochip_direction_input;
180 solo_dev->gpio_dev.direction_output = solo_gpiochip_direction_output;
181 solo_dev->gpio_dev.get = solo_gpiochip_get;
182 solo_dev->gpio_dev.set = solo_gpiochip_set;
184 ret = gpiochip_add_data(&solo_dev->gpio_dev, solo_dev);
187 solo_dev->gpio_dev.label = NULL;
194 void solo_gpio_exit(struct solo_dev *solo_dev)
196 #ifdef CONFIG_GPIOLIB
197 if (solo_dev->gpio_dev.label) {
198 gpiochip_remove(&solo_dev->gpio_dev);
199 solo_dev->gpio_dev.label = NULL;
202 solo_gpio_clear(solo_dev, 0x30);
203 solo_gpio_config(solo_dev);