diff options
Diffstat (limited to 'drivers/staging/solo6x10/gpio.c')
-rw-r--r-- | drivers/staging/solo6x10/gpio.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/staging/solo6x10/gpio.c b/drivers/staging/solo6x10/gpio.c new file mode 100644 index 00000000000..0925e6f33a9 --- /dev/null +++ b/drivers/staging/solo6x10/gpio.c | |||
@@ -0,0 +1,102 @@ | |||
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 | |||
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 | |||
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 | |||
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 | |||
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 | |||
92 | int solo_gpio_init(struct solo_dev *solo_dev) | ||
93 | { | ||
94 | solo_gpio_config(solo_dev); | ||
95 | return 0; | ||
96 | } | ||
97 | |||
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 | } | ||