diff options
Diffstat (limited to 'drivers/staging/solo6x10/solo6010-gpio.c')
-rw-r--r-- | drivers/staging/solo6x10/solo6010-gpio.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/staging/solo6x10/solo6010-gpio.c b/drivers/staging/solo6x10/solo6010-gpio.c new file mode 100644 index 00000000000..46f7a71edab --- /dev/null +++ b/drivers/staging/solo6x10/solo6010-gpio.c | |||
@@ -0,0 +1,103 @@ | |||
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 | { | ||
95 | solo_gpio_config(solo_dev); | ||
96 | return 0; | ||
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 | } | ||