1 /*
2 * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com
3 * Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/fs.h>
22 #include <asm/uaccess.h>
23 #include "solo6x10.h"
24
solo_gpio_mode(struct solo_dev * solo_dev,unsigned int port_mask,unsigned int mode)25 static void solo_gpio_mode(struct solo_dev *solo_dev,
26 unsigned int port_mask, unsigned int mode)
27 {
28 int port;
29 unsigned int ret;
30
31 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0);
32
33 /* To set gpio */
34 for (port = 0; port < 16; port++) {
35 if (!((1 << port) & port_mask))
36 continue;
37
38 ret &= (~(3 << (port << 1)));
39 ret |= ((mode & 3) << (port << 1));
40 }
41
42 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret);
43
44 /* To set extended gpio - sensor */
45 ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1);
46
47 for (port = 0; port < 16; port++) {
48 if (!((1 << (port + 16)) & port_mask))
49 continue;
50
51 if (!mode)
52 ret &= ~(1 << port);
53 else
54 ret |= 1 << port;
55 }
56
57 solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret);
58 }
59
solo_gpio_set(struct solo_dev * solo_dev,unsigned int value)60 static void solo_gpio_set(struct solo_dev *solo_dev, unsigned int value)
61 {
62 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
63 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value);
64 }
65
solo_gpio_clear(struct solo_dev * solo_dev,unsigned int value)66 static void solo_gpio_clear(struct solo_dev *solo_dev, unsigned int value)
67 {
68 solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT,
69 solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value);
70 }
71
solo_gpio_config(struct solo_dev * solo_dev)72 static void solo_gpio_config(struct solo_dev *solo_dev)
73 {
74 /* Video reset */
75 solo_gpio_mode(solo_dev, 0x30, 1);
76 solo_gpio_clear(solo_dev, 0x30);
77 udelay(100);
78 solo_gpio_set(solo_dev, 0x30);
79 udelay(100);
80
81 /* Warning: Don't touch the next line unless you're sure of what
82 * you're doing: first four gpio [0-3] are used for video. */
83 solo_gpio_mode(solo_dev, 0x0f, 2);
84
85 /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */
86 solo_gpio_mode(solo_dev, 0xff00, 1);
87
88 /* Initially set relay status to 0 */
89 solo_gpio_clear(solo_dev, 0xff00);
90 }
91
solo_gpio_init(struct solo_dev * solo_dev)92 int solo_gpio_init(struct solo_dev *solo_dev)
93 {
94 solo_gpio_config(solo_dev);
95 return 0;
96 }
97
solo_gpio_exit(struct solo_dev * solo_dev)98 void solo_gpio_exit(struct solo_dev *solo_dev)
99 {
100 solo_gpio_clear(solo_dev, 0x30);
101 solo_gpio_config(solo_dev);
102 }
103