drivers/video/fbdev/sunxvr2500.c

   1 /* sunxvr2500.c: Sun 3DLABS XVR-2500 et al. fb driver for sparc64 systems
   2  *
   3  * License: GPL
   4  *
   5  * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
   6  */
   7
   8 #include <linux/aperture.h>
   9 #include <linux/kernel.h>
  10 #include <linux/fb.h>
  11 #include <linux/pci.h>
  12 #include <linux/init.h>
  13 #include <linux/of_device.h>
  14
  15 #include <asm/io.h>
  16
  17 struct s3d_info {
  18         struct fb_info          *info;
  19         struct pci_dev          *pdev;
  20
  21         char __iomem            *fb_base;
  22         unsigned long           fb_base_phys;
  23
  24         struct device_node      *of_node;
  25
  26         unsigned int            width;
  27         unsigned int            height;
  28         unsigned int            depth;
  29         unsigned int            fb_size;
  30
  31         u32                     pseudo_palette[16];
  32 };
  33
  34 static int s3d_get_props(struct s3d_info *sp)
  35 {
  36         sp->width = of_getintprop_default(sp->of_node, "width", 0);
  37         sp->height = of_getintprop_default(sp->of_node, "height", 0);
  38         sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
  39
  40         if (!sp->width || !sp->height) {
  41                 printk(KERN_ERR "s3d: Critical properties missing for %s\n",
  42                        pci_name(sp->pdev));
  43                 return -EINVAL;
  44         }
  45
  46         return 0;
  47 }
  48
  49 static int s3d_setcolreg(unsigned regno,
  50                          unsigned red, unsigned green, unsigned blue,
  51                          unsigned transp, struct fb_info *info)
  52 {
  53         u32 value;
  54
  55         if (regno < 16) {
  56                 red >>= 8;
  57                 green >>= 8;
  58                 blue >>= 8;
  59
  60                 value = (blue << 24) | (green << 16) | (red << 8);
  61                 ((u32 *)info->pseudo_palette)[regno] = value;
  62         }
  63
  64         return 0;
  65 }
  66
  67 static const struct fb_ops s3d_ops = {
  68         .owner                  = THIS_MODULE,
  69         FB_DEFAULT_IOMEM_OPS,
  70         .fb_setcolreg           = s3d_setcolreg,
  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->fbops = &s3d_ops;
  79         info->screen_base = sp->fb_base;
  80         info->screen_size = sp->fb_size;
  81
  82         info->pseudo_palette = sp->pseudo_palette;
  83
  84         /* Fill fix common fields */
  85         strscpy(info->fix.id, "s3d", sizeof(info->fix.id));
  86         info->fix.smem_start = sp->fb_base_phys;
  87         info->fix.smem_len = sp->fb_size;
  88         info->fix.type = FB_TYPE_PACKED_PIXELS;
  89         if (sp->depth == 32 || sp->depth == 24)
  90                 info->fix.visual = FB_VISUAL_TRUECOLOR;
  91         else
  92                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
  93
  94         var->xres = sp->width;
  95         var->yres = sp->height;
  96         var->xres_virtual = var->xres;
  97         var->yres_virtual = var->yres;
  98         var->bits_per_pixel = sp->depth;
  99
 100         var->red.offset = 8;
 101         var->red.length = 8;
 102         var->green.offset = 16;
 103         var->green.length = 8;
 104         var->blue.offset = 24;
 105         var->blue.length = 8;
 106         var->transp.offset = 0;
 107         var->transp.length = 0;
 108
 109         if (fb_alloc_cmap(&info->cmap, 256, 0)) {
 110                 printk(KERN_ERR "s3d: Cannot allocate color map.\n");
 111                 return -ENOMEM;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int s3d_pci_register(struct pci_dev *pdev,
 118                             const struct pci_device_id *ent)
 119 {
 120         struct fb_info *info;
 121         struct s3d_info *sp;
 122         int err;
 123
 124         err = aperture_remove_conflicting_pci_devices(pdev, "s3dfb");
 125         if (err)
 126                 return err;
 127
 128         err = pci_enable_device(pdev);
 129         if (err < 0) {
 130                 printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
 131                        pci_name(pdev));
 132                 goto err_out;
 133         }
 134
 135         info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
 136         if (!info) {
 137                 err = -ENOMEM;
 138                 goto err_disable;
 139         }
 140
 141         sp = info->par;
 142         sp->info = info;
 143         sp->pdev = pdev;
 144         sp->of_node = pci_device_to_OF_node(pdev);
 145         if (!sp->of_node) {
 146                 printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
 147                        pci_name(pdev));
 148                 err = -ENODEV;
 149                 goto err_release_fb;
 150         }
 151
 152         sp->fb_base_phys = pci_resource_start (pdev, 1);
 153
 154         err = pci_request_region(pdev, 1, "s3d framebuffer");
 155         if (err < 0) {
 156                 printk("s3d: Cannot request region 1 for %s\n",
 157                        pci_name(pdev));
 158                 goto err_release_fb;
 159         }
 160
 161         err = s3d_get_props(sp);
 162         if (err)
 163                 goto err_release_pci;
 164
 165         /* XXX 'linebytes' is often wrong, it is equal to the width
 166          * XXX with depth of 32 on my XVR-2500 which is clearly not
 167          * XXX right.  So we don't try to use it.
 168          */
 169         switch (sp->depth) {
 170         case 8:
 171                 info->fix.line_length = sp->width;
 172                 break;
 173         case 16:
 174                 info->fix.line_length = sp->width * 2;
 175                 break;
 176         case 24:
 177                 info->fix.line_length = sp->width * 3;
 178                 break;
 179         case 32:
 180                 info->fix.line_length = sp->width * 4;
 181                 break;
 182         }
 183         sp->fb_size = info->fix.line_length * sp->height;
 184
 185         sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
 186         if (!sp->fb_base) {
 187                 err = -ENOMEM;
 188                 goto err_release_pci;
 189         }
 190
 191         err = s3d_set_fbinfo(sp);
 192         if (err)
 193                 goto err_unmap_fb;
 194
 195         pci_set_drvdata(pdev, info);
 196
 197         printk("s3d: Found device at %s\n", pci_name(pdev));
 198
 199         err = register_framebuffer(info);
 200         if (err < 0) {
 201                 printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
 202                        pci_name(pdev));
 203                 goto err_unmap_fb;
 204         }
 205
 206         return 0;
 207
 208 err_unmap_fb:
 209         iounmap(sp->fb_base);
 210
 211 err_release_pci:
 212         pci_release_region(pdev, 1);
 213
 214 err_release_fb:
 215         framebuffer_release(info);
 216
 217 err_disable:
 218         pci_disable_device(pdev);
 219
 220 err_out:
 221         return err;
 222 }
 223
 224 static const struct pci_device_id s3d_pci_table[] = {
 225         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),       },
 226         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),       },
 227         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),       },
 228         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),       },
 229         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),       },
 230         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),       },
 231         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),       },
 232         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),       },
 233         { 0, }
 234 };
 235
 236 static struct pci_driver s3d_driver = {
 237         .driver = {
 238                 .suppress_bind_attrs = true,
 239         },
 240         .name           = "s3d",
 241         .id_table       = s3d_pci_table,
 242         .probe          = s3d_pci_register,
 243 };
 244
 245 static int __init s3d_init(void)
 246 {
 247         if (fb_modesetting_disabled("s3d"))
 248                 return -ENODEV;
 249
 250         if (fb_get_options("s3d", NULL))
 251                 return -ENODEV;
 252
 253         return pci_register_driver(&s3d_driver);
 254 }
 255 device_initcall(s3d_init);