include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6.git] / drivers / auxdisplay / cfag12864bfb.c
1 /*
2  *    Filename: cfag12864bfb.c
3  *     Version: 0.1.0
4  * Description: cfag12864b LCD framebuffer driver
5  *     License: GPLv2
6  *     Depends: cfag12864b
7  *
8  *      Author: Copyright (C) Miguel Ojeda Sandonis
9  *        Date: 2006-10-31
10  *
11  *  This program is free software; you can redistribute it and/or modify
12  *  it under the terms of the GNU General Public License version 2 as
13  *  published by the Free Software Foundation.
14  *
15  *  This program is distributed in the hope that it will be useful,
16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *  GNU General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License
21  *  along with this program; if not, write to the Free Software
22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23  *
24  */
25
26 #include <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/delay.h>
30 #include <linux/errno.h>
31 #include <linux/fb.h>
32 #include <linux/mm.h>
33 #include <linux/platform_device.h>
34 #include <linux/string.h>
35 #include <linux/uaccess.h>
36 #include <linux/cfag12864b.h>
37
38 #define CFAG12864BFB_NAME "cfag12864bfb"
39
40 static struct fb_fix_screeninfo cfag12864bfb_fix __initdata = {
41         .id = "cfag12864b",
42         .type = FB_TYPE_PACKED_PIXELS,
43         .visual = FB_VISUAL_MONO10,
44         .xpanstep = 0,
45         .ypanstep = 0,
46         .ywrapstep = 0,
47         .line_length = CFAG12864B_WIDTH / 8,
48         .accel = FB_ACCEL_NONE,
49 };
50
51 static struct fb_var_screeninfo cfag12864bfb_var __initdata = {
52         .xres = CFAG12864B_WIDTH,
53         .yres = CFAG12864B_HEIGHT,
54         .xres_virtual = CFAG12864B_WIDTH,
55         .yres_virtual = CFAG12864B_HEIGHT,
56         .bits_per_pixel = 1,
57         .red = { 0, 1, 0 },
58         .green = { 0, 1, 0 },
59         .blue = { 0, 1, 0 },
60         .left_margin = 0,
61         .right_margin = 0,
62         .upper_margin = 0,
63         .lower_margin = 0,
64         .vmode = FB_VMODE_NONINTERLACED,
65 };
66
67 static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
68 {
69         return vm_insert_page(vma, vma->vm_start,
70                 virt_to_page(cfag12864b_buffer));
71 }
72
73 static struct fb_ops cfag12864bfb_ops = {
74         .owner = THIS_MODULE,
75         .fb_read = fb_sys_read,
76         .fb_write = fb_sys_write,
77         .fb_fillrect = sys_fillrect,
78         .fb_copyarea = sys_copyarea,
79         .fb_imageblit = sys_imageblit,
80         .fb_mmap = cfag12864bfb_mmap,
81 };
82
83 static int __devinit cfag12864bfb_probe(struct platform_device *device)
84 {
85         int ret = -EINVAL;
86         struct fb_info *info = framebuffer_alloc(0, &device->dev);
87
88         if (!info)
89                 goto none;
90
91         info->screen_base = (char __iomem *) cfag12864b_buffer;
92         info->screen_size = CFAG12864B_SIZE;
93         info->fbops = &cfag12864bfb_ops;
94         info->fix = cfag12864bfb_fix;
95         info->var = cfag12864bfb_var;
96         info->pseudo_palette = NULL;
97         info->par = NULL;
98         info->flags = FBINFO_FLAG_DEFAULT;
99
100         if (register_framebuffer(info) < 0)
101                 goto fballoced;
102
103         platform_set_drvdata(device, info);
104
105         printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
106                 info->fix.id);
107
108         return 0;
109
110 fballoced:
111         framebuffer_release(info);
112
113 none:
114         return ret;
115 }
116
117 static int cfag12864bfb_remove(struct platform_device *device)
118 {
119         struct fb_info *info = platform_get_drvdata(device);
120
121         if (info) {
122                 unregister_framebuffer(info);
123                 framebuffer_release(info);
124         }
125
126         return 0;
127 }
128
129 static struct platform_driver cfag12864bfb_driver = {
130         .probe  = cfag12864bfb_probe,
131         .remove = cfag12864bfb_remove,
132         .driver = {
133                 .name   = CFAG12864BFB_NAME,
134         },
135 };
136
137 static struct platform_device *cfag12864bfb_device;
138
139 static int __init cfag12864bfb_init(void)
140 {
141         int ret = -EINVAL;
142
143         /* cfag12864b_init() must be called first */
144         if (!cfag12864b_isinited()) {
145                 printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
146                         "cfag12864b is not initialized\n");
147                 goto none;
148         }
149
150         if (cfag12864b_enable()) {
151                 printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
152                         "can't enable cfag12864b refreshing (being used)\n");
153                 return -ENODEV;
154         }
155
156         ret = platform_driver_register(&cfag12864bfb_driver);
157
158         if (!ret) {
159                 cfag12864bfb_device =
160                         platform_device_alloc(CFAG12864BFB_NAME, 0);
161
162                 if (cfag12864bfb_device)
163                         ret = platform_device_add(cfag12864bfb_device);
164                 else
165                         ret = -ENOMEM;
166
167                 if (ret) {
168                         platform_device_put(cfag12864bfb_device);
169                         platform_driver_unregister(&cfag12864bfb_driver);
170                 }
171         }
172
173 none:
174         return ret;
175 }
176
177 static void __exit cfag12864bfb_exit(void)
178 {
179         platform_device_unregister(cfag12864bfb_device);
180         platform_driver_unregister(&cfag12864bfb_driver);
181         cfag12864b_disable();
182 }
183
184 module_init(cfag12864bfb_init);
185 module_exit(cfag12864bfb_exit);
186
187 MODULE_LICENSE("GPL v2");
188 MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
189 MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");