kernel/drivers/video/fbdev/sunxvr2500.c

   1 /* s3d.c: Sun 3DLABS XVR-2500 et al. driver for sparc64 systems
   2  *
   3  * Copyright (C) 2007 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/pci.h>
  10 #include <linux/init.h>
  11 #include <linux/of_device.h>
  12
  13 #include <asm/io.h>
  14
  15 struct s3d_info {
  16         struct fb_info          *info;
  17         struct pci_dev          *pdev;
  18
  19         char __iomem            *fb_base;
  20         unsigned long           fb_base_phys;
  21
  22         struct device_node      *of_node;
  23
  24         unsigned int            width;
  25         unsigned int            height;
  26         unsigned int            depth;
  27         unsigned int            fb_size;
  28
  29         u32                     pseudo_palette[16];
  30 };
  31
  32 static int s3d_get_props(struct s3d_info *sp)
  33 {
  34         sp->width = of_getintprop_default(sp->of_node, "width", 0);
  35         sp->height = of_getintprop_default(sp->of_node, "height", 0);
  36         sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
  37
  38         if (!sp->width || !sp->height) {
  39                 printk(KERN_ERR "s3d: Critical properties missing for %s\n",
  40                        pci_name(sp->pdev));
  41                 return -EINVAL;
  42         }
  43
  44         return 0;
  45 }
  46
  47 static int s3d_setcolreg(unsigned regno,
  48                          unsigned red, unsigned green, unsigned blue,
  49                          unsigned transp, struct fb_info *info)
  50 {
  51         u32 value;
  52
  53         if (regno < 16) {
  54                 red >>= 8;
  55                 green >>= 8;
  56                 blue >>= 8;
  57
  58                 value = (blue << 24) | (green << 16) | (red << 8);
  59                 ((u32 *)info->pseudo_palette)[regno] = value;
  60         }
  61
  62         return 0;
  63 }
  64
  65 static struct fb_ops s3d_ops = {
  66         .owner                  = THIS_MODULE,
  67         .fb_setcolreg           = s3d_setcolreg,
  68         .fb_fillrect            = cfb_fillrect,
  69         .fb_copyarea            = cfb_copyarea,
  70         .fb_imageblit           = cfb_imageblit,
  71 };
  72
  73 static int s3d_set_fbinfo(struct s3d_info *sp)
  74 {
  75         struct fb_info *info = sp->info;
  76         struct fb_var_screeninfo *var = &info->var;
  77
  78         info->flags = FBINFO_DEFAULT;
  79         info->fbops = &s3d_ops;
  80         info->screen_base = sp->fb_base;
  81         info->screen_size = sp->fb_size;
  82
  83         info->pseudo_palette = sp->pseudo_palette;
  84
  85         /* Fill fix common fields */
  86         strlcpy(info->fix.id, "s3d", sizeof(info->fix.id));
  87         info->fix.smem_start = sp->fb_base_phys;
  88         info->fix.smem_len = sp->fb_size;
  89         info->fix.type = FB_TYPE_PACKED_PIXELS;
  90         if (sp->depth == 32 || sp->depth == 24)
  91                 info->fix.visual = FB_VISUAL_TRUECOLOR;
  92         else
  93                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
  94
  95         var->xres = sp->width;
  96         var->yres = sp->height;
  97         var->xres_virtual = var->xres;
  98         var->yres_virtual = var->yres;
  99         var->bits_per_pixel = sp->depth;
 100
 101         var->red.offset = 8;
 102         var->red.length = 8;
 103         var->green.offset = 16;
 104         var->green.length = 8;
 105         var->blue.offset = 24;
 106         var->blue.length = 8;
 107         var->transp.offset = 0;
 108         var->transp.length = 0;
 109
 110         if (fb_alloc_cmap(&info->cmap, 256, 0)) {
 111                 printk(KERN_ERR "s3d: Cannot allocate color map.\n");
 112                 return -ENOMEM;
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int s3d_pci_register(struct pci_dev *pdev,
 119                             const struct pci_device_id *ent)
 120 {
 121         struct fb_info *info;
 122         struct s3d_info *sp;
 123         int err;
 124
 125         err = pci_enable_device(pdev);
 126         if (err < 0) {
 127                 printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
 128                        pci_name(pdev));
 129                 goto err_out;
 130         }
 131
 132         info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
 133         if (!info) {
 134                 printk(KERN_ERR "s3d: Cannot allocate fb_info\n");
 135                 err = -ENOMEM;
 136                 goto err_disable;
 137         }
 138
 139         sp = info->par;
 140         sp->info = info;
 141         sp->pdev = pdev;
 142         sp->of_node = pci_device_to_OF_node(pdev);
 143         if (!sp->of_node) {
 144                 printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
 145                        pci_name(pdev));
 146                 err = -ENODEV;
 147                 goto err_release_fb;
 148         }
 149
 150         sp->fb_base_phys = pci_resource_start (pdev, 1);
 151
 152         err = pci_request_region(pdev, 1, "s3d framebuffer");
 153         if (err < 0) {
 154                 printk("s3d: Cannot request region 1 for %s\n",
 155                        pci_name(pdev));
 156                 goto err_release_fb;
 157         }
 158
 159         err = s3d_get_props(sp);
 160         if (err)
 161                 goto err_release_pci;
 162
 163         /* XXX 'linebytes' is often wrong, it is equal to the width
 164          * XXX with depth of 32 on my XVR-2500 which is clearly not
 165          * XXX right.  So we don't try to use it.
 166          */
 167         switch (sp->depth) {
 168         case 8:
 169                 info->fix.line_length = sp->width;
 170                 break;
 171         case 16:
 172                 info->fix.line_length = sp->width * 2;
 173                 break;
 174         case 24:
 175                 info->fix.line_length = sp->width * 3;
 176                 break;
 177         case 32:
 178                 info->fix.line_length = sp->width * 4;
 179                 break;
 180         }
 181         sp->fb_size = info->fix.line_length * sp->height;
 182
 183         sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
 184         if (!sp->fb_base) {
 185                 err = -ENOMEM;
 186                 goto err_release_pci;
 187         }
 188
 189         err = s3d_set_fbinfo(sp);
 190         if (err)
 191                 goto err_unmap_fb;
 192
 193         pci_set_drvdata(pdev, info);
 194
 195         printk("s3d: Found device at %s\n", pci_name(pdev));
 196
 197         err = register_framebuffer(info);
 198         if (err < 0) {
 199                 printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
 200                        pci_name(pdev));
 201                 goto err_unmap_fb;
 202         }
 203
 204         return 0;
 205
 206 err_unmap_fb:
 207         iounmap(sp->fb_base);
 208
 209 err_release_pci:
 210         pci_release_region(pdev, 1);
 211
 212 err_release_fb:
 213         framebuffer_release(info);
 214
 215 err_disable:
 216         pci_disable_device(pdev);
 217
 218 err_out:
 219         return err;
 220 }
 221
 222 static void s3d_pci_unregister(struct pci_dev *pdev)
 223 {
 224         struct fb_info *info = pci_get_drvdata(pdev);
 225         struct s3d_info *sp = info->par;
 226
 227         unregister_framebuffer(info);
 228
 229         iounmap(sp->fb_base);
 230
 231         pci_release_region(pdev, 1);
 232
 233         framebuffer_release(info);
 234
 235         pci_disable_device(pdev);
 236 }
 237
 238 static struct pci_device_id s3d_pci_table[] = {
 239         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),       },
 240         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),       },
 241         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),       },
 242         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),       },
 243         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),       },
 244         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),       },
 245         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),       },
 246         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),       },
 247         { 0, }
 248 };
 249
 250 static struct pci_driver s3d_driver = {
 251         .name           = "s3d",
 252         .id_table       = s3d_pci_table,
 253         .probe          = s3d_pci_register,
 254         .remove         = s3d_pci_unregister,
 255 };
 256
 257 static int __init s3d_init(void)
 258 {
 259         if (fb_get_options("s3d", NULL))
 260                 return -ENODEV;
 261
 262         return pci_register_driver(&s3d_driver);
 263 }
 264
 265 static void __exit s3d_exit(void)
 266 {
 267         pci_unregister_driver(&s3d_driver);
 268 }
 269
 270 module_init(s3d_init);
 271 module_exit(s3d_exit);
 272
 273 MODULE_DESCRIPTION("framebuffer driver for Sun XVR-2500 graphics");
 274 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 275 MODULE_VERSION("1.0");
 276 MODULE_LICENSE("GPL");