1 /* sunxvr1000.c: Sun XVR-1000 driver for sparc64 systems
3 * Copyright (C) 2010 David S. Miller (davem@davemloft.net)
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/slab.h>
10 #include <linux/init.h>
11 #include <linux/of_device.h>
16 char __iomem *fb_base;
17 unsigned long fb_base_phys;
19 struct device_node *of_node;
26 u32 pseudo_palette[16];
29 static int __devinit gfb_get_props(struct gfb_info *gp)
31 gp->width = of_getintprop_default(gp->of_node, "width", 0);
32 gp->height = of_getintprop_default(gp->of_node, "height", 0);
33 gp->depth = of_getintprop_default(gp->of_node, "depth", 32);
35 if (!gp->width || !gp->height) {
36 printk(KERN_ERR "gfb: Critical properties missing for %s\n",
37 gp->of_node->full_name);
44 static int gfb_setcolreg(unsigned regno,
45 unsigned red, unsigned green, unsigned blue,
46 unsigned transp, struct fb_info *info)
55 value = (blue << 16) | (green << 8) | red;
56 ((u32 *)info->pseudo_palette)[regno] = value;
62 static struct fb_ops gfb_ops = {
64 .fb_setcolreg = gfb_setcolreg,
65 .fb_fillrect = cfb_fillrect,
66 .fb_copyarea = cfb_copyarea,
67 .fb_imageblit = cfb_imageblit,
70 static int __devinit gfb_set_fbinfo(struct gfb_info *gp)
72 struct fb_info *info = gp->info;
73 struct fb_var_screeninfo *var = &info->var;
75 info->flags = FBINFO_DEFAULT;
76 info->fbops = &gfb_ops;
77 info->screen_base = gp->fb_base;
78 info->screen_size = gp->fb_size;
80 info->pseudo_palette = gp->pseudo_palette;
82 /* Fill fix common fields */
83 strlcpy(info->fix.id, "gfb", sizeof(info->fix.id));
84 info->fix.smem_start = gp->fb_base_phys;
85 info->fix.smem_len = gp->fb_size;
86 info->fix.type = FB_TYPE_PACKED_PIXELS;
87 if (gp->depth == 32 || gp->depth == 24)
88 info->fix.visual = FB_VISUAL_TRUECOLOR;
90 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
92 var->xres = gp->width;
93 var->yres = gp->height;
94 var->xres_virtual = var->xres;
95 var->yres_virtual = var->yres;
96 var->bits_per_pixel = gp->depth;
100 var->green.offset = 8;
101 var->green.length = 8;
102 var->blue.offset = 16;
103 var->blue.length = 8;
104 var->transp.offset = 0;
105 var->transp.length = 0;
107 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
108 printk(KERN_ERR "gfb: Cannot allocate color map.\n");
115 static int __devinit gfb_probe(struct of_device *op,
116 const struct of_device_id *match)
118 struct device_node *dp = op->node;
119 struct fb_info *info;
123 info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev);
125 printk(KERN_ERR "gfb: Cannot allocate fb_info\n");
134 gp->fb_base_phys = op->resource[6].start;
136 err = gfb_get_props(gp);
140 /* Framebuffer length is the same regardless of resolution. */
141 info->fix.line_length = 16384;
142 gp->fb_size = info->fix.line_length * gp->height;
144 gp->fb_base = of_ioremap(&op->resource[6], 0,
145 gp->fb_size, "gfb fb");
149 err = gfb_set_fbinfo(gp);
153 printk("gfb: Found device at %s\n", dp->full_name);
155 err = register_framebuffer(info);
157 printk(KERN_ERR "gfb: Could not register framebuffer %s\n",
162 dev_set_drvdata(&op->dev, info);
167 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
170 framebuffer_release(info);
176 static int __devexit gfb_remove(struct of_device *op)
178 struct fb_info *info = dev_get_drvdata(&op->dev);
179 struct gfb_info *gp = info->par;
181 unregister_framebuffer(info);
183 iounmap(gp->fb_base);
185 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size);
187 framebuffer_release(info);
189 dev_set_drvdata(&op->dev, NULL);
194 static const struct of_device_id gfb_match[] = {
200 MODULE_DEVICE_TABLE(of, ffb_match);
202 static struct of_platform_driver gfb_driver = {
204 .match_table = gfb_match,
206 .remove = __devexit_p(gfb_remove),
209 static int __init gfb_init(void)
211 if (fb_get_options("gfb", NULL))
214 return of_register_driver(&gfb_driver, &of_bus_type);
217 static void __exit gfb_exit(void)
219 of_unregister_driver(&gfb_driver);
222 module_init(gfb_init);
223 module_exit(gfb_exit);
225 MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics");
226 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
227 MODULE_VERSION("1.0");
228 MODULE_LICENSE("GPL");