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David S. Miller2d378b92010-03-13 16:25:03 -08001/* sunxvr1000.c: Sun XVR-1000 driver for sparc64 systems
2 *
3 * Copyright (C) 2010 David S. Miller (davem@davemloft.net)
4 */
5
6#include <linux/module.h>
7#include <linux/kernel.h>
David S. Miller2d378b92010-03-13 16:25:03 -08008#include <linux/fb.h>
9#include <linux/init.h>
10#include <linux/of_device.h>
11
12struct gfb_info {
13 struct fb_info *info;
14
15 char __iomem *fb_base;
16 unsigned long fb_base_phys;
17
18 struct device_node *of_node;
19
20 unsigned int width;
21 unsigned int height;
22 unsigned int depth;
23 unsigned int fb_size;
24
25 u32 pseudo_palette[16];
26};
27
28static int __devinit gfb_get_props(struct gfb_info *gp)
29{
30 gp->width = of_getintprop_default(gp->of_node, "width", 0);
31 gp->height = of_getintprop_default(gp->of_node, "height", 0);
32 gp->depth = of_getintprop_default(gp->of_node, "depth", 32);
33
34 if (!gp->width || !gp->height) {
35 printk(KERN_ERR "gfb: Critical properties missing for %s\n",
36 gp->of_node->full_name);
37 return -EINVAL;
38 }
39
40 return 0;
41}
42
43static int gfb_setcolreg(unsigned regno,
44 unsigned red, unsigned green, unsigned blue,
45 unsigned transp, struct fb_info *info)
46{
47 u32 value;
48
49 if (regno < 16) {
50 red >>= 8;
51 green >>= 8;
52 blue >>= 8;
53
54 value = (blue << 16) | (green << 8) | red;
55 ((u32 *)info->pseudo_palette)[regno] = value;
56 }
57
58 return 0;
59}
60
61static struct fb_ops gfb_ops = {
62 .owner = THIS_MODULE,
63 .fb_setcolreg = gfb_setcolreg,
64 .fb_fillrect = cfb_fillrect,
65 .fb_copyarea = cfb_copyarea,
66 .fb_imageblit = cfb_imageblit,
67};
68
69static int __devinit gfb_set_fbinfo(struct gfb_info *gp)
70{
71 struct fb_info *info = gp->info;
72 struct fb_var_screeninfo *var = &info->var;
73
74 info->flags = FBINFO_DEFAULT;
75 info->fbops = &gfb_ops;
76 info->screen_base = gp->fb_base;
77 info->screen_size = gp->fb_size;
78
79 info->pseudo_palette = gp->pseudo_palette;
80
81 /* Fill fix common fields */
82 strlcpy(info->fix.id, "gfb", sizeof(info->fix.id));
83 info->fix.smem_start = gp->fb_base_phys;
84 info->fix.smem_len = gp->fb_size;
85 info->fix.type = FB_TYPE_PACKED_PIXELS;
86 if (gp->depth == 32 || gp->depth == 24)
87 info->fix.visual = FB_VISUAL_TRUECOLOR;
88 else
89 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
90
91 var->xres = gp->width;
92 var->yres = gp->height;
93 var->xres_virtual = var->xres;
94 var->yres_virtual = var->yres;
95 var->bits_per_pixel = gp->depth;
96
97 var->red.offset = 0;
98 var->red.length = 8;
99 var->green.offset = 8;
100 var->green.length = 8;
101 var->blue.offset = 16;
102 var->blue.length = 8;
103 var->transp.offset = 0;
104 var->transp.length = 0;
105
106 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
107 printk(KERN_ERR "gfb: Cannot allocate color map.\n");
108 return -ENOMEM;
109 }
110
111 return 0;
112}
113
114static int __devinit gfb_probe(struct of_device *op,
115 const struct of_device_id *match)
116{
Grant Likely61c7a082010-04-13 16:12:29 -0700117 struct device_node *dp = op->dev.of_node;
David S. Miller2d378b92010-03-13 16:25:03 -0800118 struct fb_info *info;
119 struct gfb_info *gp;
120 int err;
121
122 info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev);
123 if (!info) {
124 printk(KERN_ERR "gfb: Cannot allocate fb_info\n");
125 err = -ENOMEM;
126 goto err_out;
127 }
128
129 gp = info->par;
130 gp->info = info;
131 gp->of_node = dp;
132
133 gp->fb_base_phys = op->resource[6].start;
134
135 err = gfb_get_props(gp);
136 if (err)
137 goto err_release_fb;
138
139 /* Framebuffer length is the same regardless of resolution. */
140 info->fix.line_length = 16384;
141 gp->fb_size = info->fix.line_length * gp->height;
142
143 gp->fb_base = of_ioremap(&op->resource[6], 0,
144 gp->fb_size, "gfb fb");
145 if (!gp->fb_base)
146 goto err_release_fb;
147
148 err = gfb_set_fbinfo(gp);
149 if (err)
150 goto err_unmap_fb;
151
152 printk("gfb: Found device at %s\n", dp->full_name);
153
154 err = register_framebuffer(info);
155 if (err < 0) {
156 printk(KERN_ERR "gfb: Could not register framebuffer %s\n",
157 dp->full_name);
158 goto err_unmap_fb;
159 }
160
161 dev_set_drvdata(&op->dev, info);
162
163 return 0;
164
165err_unmap_fb:
166 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
167
168err_release_fb:
169 framebuffer_release(info);
170
171err_out:
172 return err;
173}
174
175static int __devexit gfb_remove(struct of_device *op)
176{
177 struct fb_info *info = dev_get_drvdata(&op->dev);
178 struct gfb_info *gp = info->par;
179
180 unregister_framebuffer(info);
181
182 iounmap(gp->fb_base);
183
184 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
185
186 framebuffer_release(info);
187
188 dev_set_drvdata(&op->dev, NULL);
189
190 return 0;
191}
192
193static const struct of_device_id gfb_match[] = {
194 {
195 .name = "SUNW,gfb",
196 },
197 {},
198};
199MODULE_DEVICE_TABLE(of, ffb_match);
200
201static struct of_platform_driver gfb_driver = {
David S. Miller2d378b92010-03-13 16:25:03 -0800202 .probe = gfb_probe,
203 .remove = __devexit_p(gfb_remove),
Grant Likely40182942010-04-13 16:13:02 -0700204 .driver = {
205 .name = "gfb",
206 .owner = THIS_MODULE,
207 .of_match_table = gfb_match,
208 },
David S. Miller2d378b92010-03-13 16:25:03 -0800209};
210
211static int __init gfb_init(void)
212{
213 if (fb_get_options("gfb", NULL))
214 return -ENODEV;
215
216 return of_register_driver(&gfb_driver, &of_bus_type);
217}
218
219static void __exit gfb_exit(void)
220{
221 of_unregister_driver(&gfb_driver);
222}
223
224module_init(gfb_init);
225module_exit(gfb_exit);
226
227MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics");
228MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
229MODULE_VERSION("1.0");
230MODULE_LICENSE("GPL");