1 /*
2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
3 *
4 * Original author:
5 * Ben Collins <bcollins@ubuntu.com>
6 *
7 * Additional work by:
8 * John Brooks <john.brooks@bluecherry.net>
9 *
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.
14 *
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.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/fs.h>
23 #include <linux/delay.h>
24 #include <linux/uaccess.h>
25
26 #include "solo6x10.h"
27
solo_gpio_mode(struct solo_dev * solo_dev,unsigned int port_mask,unsigned int mode)28 static void solo_gpio_mode(struct solo_dev *solo_dev,
29 unsigned int port_mask, unsigned int mode)
30 {
31 int port;
32 unsigned int ret;
33
34 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
35
36 /* To set gpio */
37 for (port = 0; port < 16; port++) {
38 if (!((1 << port) & port_mask))
39 continue;
40
41 ret &= (~(3 << (port << 1)));
42 ret |= ((mode & 3) << (port << 1));
43 }
44
45 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
46
47 /* To set extended gpio - sensor */
48 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
49
50 for (port = 0; port < 16; port++) {
51 if (!((1 << (port + 16)) & port_mask))
52 continue;
53
54 if (!mode)
55 ret &= ~(1 << port);
56 else
57 ret |= 1 << port;
58 }
59
60 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
61 }
62
solo_gpio_set(struct solo_dev * solo_dev,unsigned int value)63 static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
64 {
65 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
66 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
67 }
68
solo_gpio_clear(struct solo_dev * solo_dev,unsigned int value)69 static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
70 {
71 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
72 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
73 }
74
solo_gpio_config(struct solo_dev * solo_dev)75 static void solo_gpio_config(struct solo_dev *solo_dev)
76 {
77 /* Video reset */
78 solo_gpio_mode(solo_dev, 0x30, 1);
79 solo_gpio_clear(solo_dev, 0x30);
80 udelay(100);
81 solo_gpio_set(solo_dev, 0x30);
82 udelay(100);
83
84 /* Warning: Don't touch the next line unless you're sure of what
85 * you're doing: first four gpio [0-3] are used for video. */
86 solo_gpio_mode(solo_dev, 0x0f, 2);
87
88 /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
89 solo_gpio_mode(solo_dev, 0xff00, 1);
90
91 /* Initially set relay status to 0 */
92 solo_gpio_clear(solo_dev, 0xff00);
93 }
94
solo_gpio_init(struct solo_dev * solo_dev)95 int solo_gpio_init(struct solo_dev *solo_dev)
96 {
97 solo_gpio_config(solo_dev);
98 return 0;
99 }
100
solo_gpio_exit(struct solo_dev * solo_dev)101 void solo_gpio_exit(struct solo_dev *solo_dev)
102 {
103 solo_gpio_clear(solo_dev, 0x30);
104 solo_gpio_config(solo_dev);
105 }
106