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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 | ||
24 | #include "solo6010.h" | |
25 | ||
26 | static void solo_gpio_mode(struct solo6010_dev *solo_dev, | |
27 | unsigned int port_mask, unsigned int mode) | |
28 | { | |
29 | int port; | |
30 | unsigned int ret; | |
31 | ||
32 | ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_0); | |
33 | ||
34 | /* To set gpio */ | |
35 | for (port = 0; port < 16; port++) { | |
36 | if (!((1 << port) & port_mask)) | |
37 | continue; | |
38 | ||
39 | ret &= (~(3 << (port << 1))); | |
40 | ret |= ((mode & 3) << (port << 1)); | |
41 | } | |
42 | ||
43 | solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_0, ret); | |
44 | ||
45 | /* To set extended gpio - sensor */ | |
46 | ret = solo_reg_read(solo_dev, SOLO_GPIO_CONFIG_1); | |
47 | ||
48 | for (port = 0; port < 16; port++) { | |
49 | if (!((1 << (port + 16)) & port_mask)) | |
50 | continue; | |
51 | ||
52 | if (!mode) | |
53 | ret &= ~(1 << port); | |
54 | else | |
55 | ret |= 1 << port; | |
56 | } | |
57 | ||
58 | solo_reg_write(solo_dev, SOLO_GPIO_CONFIG_1, ret); | |
59 | } | |
60 | ||
61 | static void solo_gpio_set(struct solo6010_dev *solo_dev, unsigned int value) | |
62 | { | |
63 | solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, | |
64 | solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) | value); | |
65 | } | |
66 | ||
67 | static void solo_gpio_clear(struct solo6010_dev *solo_dev, unsigned int value) | |
68 | { | |
69 | solo_reg_write(solo_dev, SOLO_GPIO_DATA_OUT, | |
70 | solo_reg_read(solo_dev, SOLO_GPIO_DATA_OUT) & ~value); | |
71 | } | |
72 | ||
73 | static void solo_gpio_config(struct solo6010_dev *solo_dev) | |
74 | { | |
75 | /* Video reset */ | |
76 | solo_gpio_mode(solo_dev, 0x30, 1); | |
77 | solo_gpio_clear(solo_dev, 0x30); | |
78 | udelay(100); | |
79 | solo_gpio_set(solo_dev, 0x30); | |
80 | udelay(100); | |
81 | ||
82 | /* Warning: Don't touch the next line unless you're sure of what | |
83 | * you're doing: first four gpio [0-3] are used for video. */ | |
84 | solo_gpio_mode(solo_dev, 0x0f, 2); | |
85 | ||
86 | /* We use bit 8-15 of SOLO_GPIO_CONFIG_0 for relay purposes */ | |
87 | solo_gpio_mode(solo_dev, 0xff00, 1); | |
88 | ||
89 | /* Initially set relay status to 0 */ | |
90 | solo_gpio_clear(solo_dev, 0xff00); | |
91 | } | |
92 | ||
93 | int solo_gpio_init(struct solo6010_dev *solo_dev) | |
94 | { | |
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95 | solo_gpio_config(solo_dev); |
96 | return 0; | |
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97 | } |
98 | ||
99 | void solo_gpio_exit(struct solo6010_dev *solo_dev) | |
100 | { | |
101 | solo_gpio_clear(solo_dev, 0x30); | |
102 | solo_gpio_config(solo_dev); | |
103 | } |