1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Filename: cfag12864bfb.c
* Version: 0.1.0
* Description: cfag12864b LCD framebuffer driver
* License: GPLv2
* Depends: cfag12864b
*
* Author: Copyright (C) Miguel Ojeda Sandonis
* Date: 2006-10-31
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/cfag12864b.h>
#define CFAG12864BFB_NAME "cfag12864bfb"
static struct fb_fix_screeninfo cfag12864bfb_fix = {
.id = "cfag12864b",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_MONO10,
.xpanstep = 0,
.ypanstep = 0,
.ywrapstep = 0,
.line_length = CFAG12864B_WIDTH / 8,
.accel = FB_ACCEL_NONE,
};
static struct fb_var_screeninfo cfag12864bfb_var = {
.xres = CFAG12864B_WIDTH,
.yres = CFAG12864B_HEIGHT,
.xres_virtual = CFAG12864B_WIDTH,
.yres_virtual = CFAG12864B_HEIGHT,
.bits_per_pixel = 1,
.red = { 0, 1, 0 },
.green = { 0, 1, 0 },
.blue = { 0, 1, 0 },
.left_margin = 0,
.right_margin = 0,
.upper_margin = 0,
.lower_margin = 0,
.vmode = FB_VMODE_NONINTERLACED,
};
static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
return vm_insert_page(vma, vma->vm_start,
virt_to_page(cfag12864b_buffer));
}
static struct fb_ops cfag12864bfb_ops = {
.owner = THIS_MODULE,
.fb_read = fb_sys_read,
.fb_write = fb_sys_write,
.fb_fillrect = sys_fillrect,
.fb_copyarea = sys_copyarea,
.fb_imageblit = sys_imageblit,
.fb_mmap = cfag12864bfb_mmap,
};
static int cfag12864bfb_probe(struct platform_device *device)
{
int ret = -EINVAL;
struct fb_info *info = framebuffer_alloc(0, &device->dev);
if (!info)
goto none;
info->screen_base = (char __iomem *) cfag12864b_buffer;
info->screen_size = CFAG12864B_SIZE;
info->fbops = &cfag12864bfb_ops;
info->fix = cfag12864bfb_fix;
info->var = cfag12864bfb_var;
info->pseudo_palette = NULL;
info->par = NULL;
info->flags = FBINFO_FLAG_DEFAULT;
if (register_framebuffer(info) < 0)
goto fballoced;
platform_set_drvdata(device, info);
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
info->fix.id);
return 0;
fballoced:
framebuffer_release(info);
none:
return ret;
}
static int cfag12864bfb_remove(struct platform_device *device)
{
struct fb_info *info = platform_get_drvdata(device);
if (info) {
unregister_framebuffer(info);
framebuffer_release(info);
}
return 0;
}
static struct platform_driver cfag12864bfb_driver = {
.probe = cfag12864bfb_probe,
.remove = cfag12864bfb_remove,
.driver = {
.name = CFAG12864BFB_NAME,
},
};
static struct platform_device *cfag12864bfb_device;
static int __init cfag12864bfb_init(void)
{
int ret = -EINVAL;
/* cfag12864b_init() must be called first */
if (!cfag12864b_isinited()) {
printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
"cfag12864b is not initialized\n");
goto none;
}
if (cfag12864b_enable()) {
printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
"can't enable cfag12864b refreshing (being used)\n");
return -ENODEV;
}
ret = platform_driver_register(&cfag12864bfb_driver);
if (!ret) {
cfag12864bfb_device =
platform_device_alloc(CFAG12864BFB_NAME, 0);
if (cfag12864bfb_device)
ret = platform_device_add(cfag12864bfb_device);
else
ret = -ENOMEM;
if (ret) {
platform_device_put(cfag12864bfb_device);
platform_driver_unregister(&cfag12864bfb_driver);
}
}
none:
return ret;
}
static void __exit cfag12864bfb_exit(void)
{
platform_device_unregister(cfag12864bfb_device);
platform_driver_unregister(&cfag12864bfb_driver);
cfag12864b_disable();
}
module_init(cfag12864bfb_init);
module_exit(cfag12864bfb_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");
|
