1 /* 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> 8 #include <linux/fb.h> 9 #include <linux/init.h> 10 #include <linux/of_device.h> 11 12 struct 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 28 static int 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 43 static 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 61 static 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 69 static int 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 } 113 114 static int gfb_probe(struct platform_device *op) 115 { 116 struct device_node *dp = op->dev.of_node; 117 struct fb_info *info; 118 struct gfb_info *gp; 119 int err; 120 121 info = framebuffer_alloc(sizeof(struct gfb_info), &op->dev); 122 if (!info) { 123 printk(KERN_ERR "gfb: Cannot allocate fb_info\n"); 124 err = -ENOMEM; 125 goto err_out; 126 } 127 128 gp = info->par; 129 gp->info = info; 130 gp->of_node = dp; 131 132 gp->fb_base_phys = op->resource[6].start; 133 134 err = gfb_get_props(gp); 135 if (err) 136 goto err_release_fb; 137 138 /* Framebuffer length is the same regardless of resolution. */ 139 info->fix.line_length = 16384; 140 gp->fb_size = info->fix.line_length * gp->height; 141 142 gp->fb_base = of_ioremap(&op->resource[6], 0, 143 gp->fb_size, "gfb fb"); 144 if (!gp->fb_base) { 145 err = -ENOMEM; 146 goto err_release_fb; 147 } 148 149 err = gfb_set_fbinfo(gp); 150 if (err) 151 goto err_unmap_fb; 152 153 printk("gfb: Found device at %s\n", dp->full_name); 154 155 err = register_framebuffer(info); 156 if (err < 0) { 157 printk(KERN_ERR "gfb: Could not register framebuffer %s\n", 158 dp->full_name); 159 goto err_unmap_fb; 160 } 161 162 dev_set_drvdata(&op->dev, info); 163 164 return 0; 165 166 err_unmap_fb: 167 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); 168 169 err_release_fb: 170 framebuffer_release(info); 171 172 err_out: 173 return err; 174 } 175 176 static int gfb_remove(struct platform_device *op) 177 { 178 struct fb_info *info = dev_get_drvdata(&op->dev); 179 struct gfb_info *gp = info->par; 180 181 unregister_framebuffer(info); 182 183 iounmap(gp->fb_base); 184 185 of_iounmap(&op->resource[6], gp->fb_base, gp->fb_size); 186 187 framebuffer_release(info); 188 189 return 0; 190 } 191 192 static const struct of_device_id gfb_match[] = { 193 { 194 .name = "SUNW,gfb", 195 }, 196 {}, 197 }; 198 MODULE_DEVICE_TABLE(of, ffb_match); 199 200 static struct platform_driver gfb_driver = { 201 .probe = gfb_probe, 202 .remove = gfb_remove, 203 .driver = { 204 .name = "gfb", 205 .of_match_table = gfb_match, 206 }, 207 }; 208 209 static int __init gfb_init(void) 210 { 211 if (fb_get_options("gfb", NULL)) 212 return -ENODEV; 213 214 return platform_driver_register(&gfb_driver); 215 } 216 217 static void __exit gfb_exit(void) 218 { 219 platform_driver_unregister(&gfb_driver); 220 } 221 222 module_init(gfb_init); 223 module_exit(gfb_exit); 224 225 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"); 229