David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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> |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 28 | static int gfb_get_props(struct gfb_info *gp) |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 69 | static int gfb_set_fbinfo(struct gfb_info *gp) |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 114 | static int gfb_probe(struct platform_device *op) |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 115 | { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 116 | struct device_node *dp = op->dev.of_node; |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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"); |
Peter Senna Tschudin | 6a1e5f8 | 2012-09-18 14:07:52 +0200 | [diff] [blame] | 144 | if (!gp->fb_base) { |
| 145 | err = -ENOMEM; |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 146 | goto err_release_fb; |
Peter Senna Tschudin | 6a1e5f8 | 2012-09-18 14:07:52 +0200 | [diff] [blame] | 147 | } |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 176 | static int gfb_remove(struct platform_device *op) |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 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 | |
Grant Likely | 28541d0 | 2011-02-22 21:07:43 -0700 | [diff] [blame] | 200 | static struct platform_driver gfb_driver = { |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 201 | .probe = gfb_probe, |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 202 | .remove = gfb_remove, |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 203 | .driver = { |
| 204 | .name = "gfb", |
| 205 | .owner = THIS_MODULE, |
| 206 | .of_match_table = gfb_match, |
| 207 | }, |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 208 | }; |
| 209 | |
| 210 | static int __init gfb_init(void) |
| 211 | { |
| 212 | if (fb_get_options("gfb", NULL)) |
| 213 | return -ENODEV; |
| 214 | |
Grant Likely | 28541d0 | 2011-02-22 21:07:43 -0700 | [diff] [blame] | 215 | return platform_driver_register(&gfb_driver); |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | static void __exit gfb_exit(void) |
| 219 | { |
Grant Likely | 28541d0 | 2011-02-22 21:07:43 -0700 | [diff] [blame] | 220 | platform_driver_unregister(&gfb_driver); |
David S. Miller | 2d378b9 | 2010-03-13 16:25:03 -0800 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | module_init(gfb_init); |
| 224 | module_exit(gfb_exit); |
| 225 | |
| 226 | MODULE_DESCRIPTION("framebuffer driver for Sun XVR-1000 graphics"); |
| 227 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); |
| 228 | MODULE_VERSION("1.0"); |
| 229 | MODULE_LICENSE("GPL"); |