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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* sunxvr1000.c: Sun XVR-1000 driver for sparc64 systems
*
* Copyright (C) 2010 David S. Miller (davem@davemloft.net)
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/of_device.h>
struct gfb_info {
struct fb_info *info;
char __iomem *fb_base;
unsigned long fb_base_phys;
struct device_node *of_node;
unsigned int width;
unsigned int height;
unsigned int depth;
unsigned int fb_size;
u32 pseudo_palette[16];
};
static int __devinit gfb_get_props(struct gfb_info *gp)
{
gp->width = of_getintprop_default(gp->of_node, "width", 0);
gp->height = of_getintprop_default(gp->of_node, "height", 0);
gp->depth = of_getintprop_default(gp->of_node, "depth", 32);
if (!gp->width || !gp->height) {
printk(KERN_ERR "gfb: Critical properties missing for %s\n",
gp->of_node->full_name);
return -EINVAL;
}
return 0;
}
static int gfb_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
u32 value;
if (regno < 16) {
red >>= 8;
green >>= 8;
blue >>= 8;
value = (blue << 16) | (green << 8) | red;
((u32 *)info->pseudo_palette)[regno] = value;
}
return 0;
}
static struct fb_ops gfb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = gfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int __devinit gfb_set_fbinfo(struct gfb_info *gp)
{
struct fb_info *info = gp->info;
struct fb_var_screeninfo *var = &info->var;
info->flags = FBINFO_DEFAULT;
info->fbops = &gfb_ops;
info->screen_base = gp->fb_base;
info->screen_size = gp->fb_size;
info->pseudo_palette = gp->pseudo_palette;
/* Fill fix common fields */
strlcpy(info->fix.id, "gfb", sizeof(info->fix.id));
info->fix.smem_start = gp->fb_base_phys;
info->fix.smem_len = gp->fb_size;
info->fix.type = FB_TYPE_PACKED_PIXELS;
if (gp->depth == 32 || gp->depth == 24)
info->fix.visual = FB_VISUAL_TRUECOLOR;
else
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
var->xres = gp->width;
var->yres = gp->height;
var->xres_virtual = var->xres;
var->yres_virtual = var->yres;
var->bits_per_pixel = gp->depth;
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 16;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
if (fb_alloc_cmap(&info->cmap, 256, 0)) {
printk(KERN_ERR "gfb: Cannot allocate color map.\n");
return -ENOMEM;
}
return 0;
}
static int __devinit gfb_probe(struct of_device *op,
const struct of_device_id *match)
{
struct device_node *dp = op->dev.of_node;
struct fb_info *info;
struct gfb_info *gp;
int err;
info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev);
if (!info) {
printk(KERN_ERR "gfb: Cannot allocate fb_info\n");
err = -ENOMEM;
goto err_out;
}
gp = info->par;
gp->info = info;
gp->of_node = dp;
gp->fb_base_phys = op->resource[6].start;
err = gfb_get_props(gp);
if (err)
goto err_release_fb;
/* Framebuffer length is the same regardless of resolution. */
info->fix.line_length = 16384;
gp->fb_size = info->fix.line_length * gp->height;
gp->fb_base = of_ioremap(&op->resource[6], 0,
gp->fb_size, "gfb fb");
if (!gp->fb_base)
goto err_release_fb;
err = gfb_set_fbinfo(gp);
if (err)
goto err_unmap_fb;
printk("gfb: Found device at %s\n", dp->full_name);
err = register_framebuffer(info);
if (err < 0) {
printk(KERN_ERR "gfb: Could not register framebuffer %s\n",
dp->full_name);
goto err_unmap_fb;
}
dev_set_drvdata(&op->dev, info);
return 0;
err_unmap_fb:
of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
err_release_fb:
framebuffer_release(info);
err_out:
return err;
}
static int __devexit gfb_remove(struct of_device *op)
{
struct fb_info *info = dev_get_drvdata(&op->dev);
struct gfb_info *gp = info->par;
unregister_framebuffer(info);
iounmap(gp->fb_base);
of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
framebuffer_release(info);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
static const struct of_device_id gfb_match[] = {
{
.name = "SUNW,gfb",
},
{},
};
MODULE_DEVICE_TABLE(of, ffb_match);
static struct of_platform_driver gfb_driver = {
.probe = gfb_probe,
.remove = __devexit_p(gfb_remove),
.driver = {
.name = "gfb",
.owner = THIS_MODULE,
.of_match_table = gfb_match,
},
};
static int __init gfb_init(void)
{
if (fb_get_options("gfb", NULL))
return -ENODEV;
return of_register_platform_driver(&gfb_driver);
}
static void __exit gfb_exit(void)
{
of_unregister_platform_driver(&gfb_driver);
}
module_init(gfb_init);
module_exit(gfb_exit);
MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");
|
