drivers/video/sunxvr500.c

   1 /* sunxvr500.c: Sun 3DLABS XVR-500 Expert3D 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 /* XXX This device has a 'dev-comm' property which apparently is
  16  * XXX a pointer into the openfirmware's address space which is
  17  * XXX a shared area the kernel driver can use to keep OBP
  18  * XXX informed about the current resolution setting.  The idea
  19  * XXX is that the kernel can change resolutions, and as long
  20  * XXX as the values in the 'dev-comm' area are accurate then
  21  * XXX OBP can still render text properly to the console.
  22  * XXX
  23  * XXX I'm still working out the layout of this and whether there
  24  * XXX are any signatures we need to look for etc.
  25  */
  26 struct e3d_info {
  27         struct fb_info          *info;
  28         struct pci_dev          *pdev;
  29
  30         spinlock_t              lock;
  31
  32         char __iomem            *fb_base;
  33         unsigned long           fb_base_phys;
  34
  35         unsigned long           fb8_buf_diff;
  36         unsigned long           regs_base_phys;
  37
  38         void __iomem            *ramdac;
  39
  40         struct device_node      *of_node;
  41
  42         unsigned int            width;
  43         unsigned int            height;
  44         unsigned int            depth;
  45         unsigned int            fb_size;
  46
  47         u32                     fb_base_reg;
  48         u32                     fb8_0_off;
  49         u32                     fb8_1_off;
  50
  51         u32                     pseudo_palette[16];
  52 };
  53
  54 static int e3d_get_props(struct e3d_info *ep)
  55 {
  56         ep->width = of_getintprop_default(ep->of_node, "width", 0);
  57         ep->height = of_getintprop_default(ep->of_node, "height", 0);
  58         ep->depth = of_getintprop_default(ep->of_node, "depth", 8);
  59
  60         if (!ep->width || !ep->height) {
  61                 printk(KERN_ERR "e3d: Critical properties missing for %s\n",
  62                        pci_name(ep->pdev));
  63                 return -EINVAL;
  64         }
  65
  66         return 0;
  67 }
  68
  69 /* My XVR-500 comes up, at 1280x768 and a FB base register value of
  70  * 0x04000000, the following video layout register values:
  71  *
  72  * RAMDAC_VID_WH        0x03ff04ff
  73  * RAMDAC_VID_CFG       0x1a0b0088
  74  * RAMDAC_VID_32FB_0    0x04000000
  75  * RAMDAC_VID_32FB_1    0x04800000
  76  * RAMDAC_VID_8FB_0     0x05000000
  77  * RAMDAC_VID_8FB_1     0x05200000
  78  * RAMDAC_VID_XXXFB     0x05400000
  79  * RAMDAC_VID_YYYFB     0x05c00000
  80  * RAMDAC_VID_ZZZFB     0x05e00000
  81  */
  82 /* Video layout registers */
  83 #define RAMDAC_VID_WH           0x00000070UL /* (height-1)<<16 | (width-1) */
  84 #define RAMDAC_VID_CFG          0x00000074UL /* 0x1a000088|(linesz_log2<<16) */
  85 #define RAMDAC_VID_32FB_0       0x00000078UL /* PCI base 32bpp FB buffer 0 */
  86 #define RAMDAC_VID_32FB_1       0x0000007cUL /* PCI base 32bpp FB buffer 1 */
  87 #define RAMDAC_VID_8FB_0        0x00000080UL /* PCI base 8bpp FB buffer 0 */
  88 #define RAMDAC_VID_8FB_1        0x00000084UL /* PCI base 8bpp FB buffer 1 */
  89 #define RAMDAC_VID_XXXFB        0x00000088UL /* PCI base of XXX FB */
  90 #define RAMDAC_VID_YYYFB        0x0000008cUL /* PCI base of YYY FB */
  91 #define RAMDAC_VID_ZZZFB        0x00000090UL /* PCI base of ZZZ FB */
  92
  93 /* CLUT registers */
  94 #define RAMDAC_INDEX            0x000000bcUL
  95 #define RAMDAC_DATA             0x000000c0UL
  96
  97 static void e3d_clut_write(struct e3d_info *ep, int index, u32 val)
  98 {
  99         void __iomem *ramdac = ep->ramdac;
 100         unsigned long flags;
 101
 102         spin_lock_irqsave(&ep->lock, flags);
 103
 104         writel(index, ramdac + RAMDAC_INDEX);
 105         writel(val, ramdac + RAMDAC_DATA);
 106
 107         spin_unlock_irqrestore(&ep->lock, flags);
 108 }
 109
 110 static int e3d_setcolreg(unsigned regno,
 111                          unsigned red, unsigned green, unsigned blue,
 112                          unsigned transp, struct fb_info *info)
 113 {
 114         struct e3d_info *ep = info->par;
 115         u32 red_8, green_8, blue_8;
 116         u32 red_10, green_10, blue_10;
 117         u32 value;
 118
 119         if (regno >= 256)
 120                 return 1;
 121
 122         red_8 = red >> 8;
 123         green_8 = green >> 8;
 124         blue_8 = blue >> 8;
 125
 126         value = (blue_8 << 24) | (green_8 << 16) | (red_8 << 8);
 127
 128         if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16)
 129                 ((u32 *)info->pseudo_palette)[regno] = value;
 130
 131
 132         red_10 = red >> 6;
 133         green_10 = green >> 6;
 134         blue_10 = blue >> 6;
 135
 136         value = (blue_10 << 20) | (green_10 << 10) | (red_10 << 0);
 137         e3d_clut_write(ep, regno, value);
 138
 139         return 0;
 140 }
 141
 142 /* XXX This is a bit of a hack.  I can't figure out exactly how the
 143  * XXX two 8bpp areas of the framebuffer work.  I imagine there is
 144  * XXX a WID attribute somewhere else in the framebuffer which tells
 145  * XXX the ramdac which of the two 8bpp framebuffer regions to take
 146  * XXX the pixel from.  So, for now, render into both regions to make
 147  * XXX sure the pixel shows up.
 148  */
 149 static void e3d_imageblit(struct fb_info *info, const struct fb_image *image)
 150 {
 151         struct e3d_info *ep = info->par;
 152         unsigned long flags;
 153
 154         spin_lock_irqsave(&ep->lock, flags);
 155         cfb_imageblit(info, image);
 156         info->screen_base += ep->fb8_buf_diff;
 157         cfb_imageblit(info, image);
 158         info->screen_base -= ep->fb8_buf_diff;
 159         spin_unlock_irqrestore(&ep->lock, flags);
 160 }
 161
 162 static void e3d_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 163 {
 164         struct e3d_info *ep = info->par;
 165         unsigned long flags;
 166
 167         spin_lock_irqsave(&ep->lock, flags);
 168         cfb_fillrect(info, rect);
 169         info->screen_base += ep->fb8_buf_diff;
 170         cfb_fillrect(info, rect);
 171         info->screen_base -= ep->fb8_buf_diff;
 172         spin_unlock_irqrestore(&ep->lock, flags);
 173 }
 174
 175 static void e3d_copyarea(struct fb_info *info, const struct fb_copyarea *area)
 176 {
 177         struct e3d_info *ep = info->par;
 178         unsigned long flags;
 179
 180         spin_lock_irqsave(&ep->lock, flags);
 181         cfb_copyarea(info, area);
 182         info->screen_base += ep->fb8_buf_diff;
 183         cfb_copyarea(info, area);
 184         info->screen_base -= ep->fb8_buf_diff;
 185         spin_unlock_irqrestore(&ep->lock, flags);
 186 }
 187
 188 static struct fb_ops e3d_ops = {
 189         .owner                  = THIS_MODULE,
 190         .fb_setcolreg           = e3d_setcolreg,
 191         .fb_fillrect            = e3d_fillrect,
 192         .fb_copyarea            = e3d_copyarea,
 193         .fb_imageblit           = e3d_imageblit,
 194 };
 195
 196 static int e3d_set_fbinfo(struct e3d_info *ep)
 197 {
 198         struct fb_info *info = ep->info;
 199         struct fb_var_screeninfo *var = &info->var;
 200
 201         info->flags = FBINFO_DEFAULT;
 202         info->fbops = &e3d_ops;
 203         info->screen_base = ep->fb_base;
 204         info->screen_size = ep->fb_size;
 205
 206         info->pseudo_palette = ep->pseudo_palette;
 207
 208         /* Fill fix common fields */
 209         strlcpy(info->fix.id, "e3d", sizeof(info->fix.id));
 210         info->fix.smem_start = ep->fb_base_phys;
 211         info->fix.smem_len = ep->fb_size;
 212         info->fix.type = FB_TYPE_PACKED_PIXELS;
 213         if (ep->depth == 32 || ep->depth == 24)
 214                 info->fix.visual = FB_VISUAL_TRUECOLOR;
 215         else
 216                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 217
 218         var->xres = ep->width;
 219         var->yres = ep->height;
 220         var->xres_virtual = var->xres;
 221         var->yres_virtual = var->yres;
 222         var->bits_per_pixel = ep->depth;
 223
 224         var->red.offset = 8;
 225         var->red.length = 8;
 226         var->green.offset = 16;
 227         var->green.length = 8;
 228         var->blue.offset = 24;
 229         var->blue.length = 8;
 230         var->transp.offset = 0;
 231         var->transp.length = 0;
 232
 233         if (fb_alloc_cmap(&info->cmap, 256, 0)) {
 234                 printk(KERN_ERR "e3d: Cannot allocate color map.\n");
 235                 return -ENOMEM;
 236         }
 237
 238         return 0;
 239 }
 240
 241 static int e3d_pci_register(struct pci_dev *pdev,
 242                             const struct pci_device_id *ent)
 243 {
 244         struct device_node *of_node;
 245         const char *device_type;
 246         struct fb_info *info;
 247         struct e3d_info *ep;
 248         unsigned int line_length;
 249         int err;
 250
 251         of_node = pci_device_to_OF_node(pdev);
 252         if (!of_node) {
 253                 printk(KERN_ERR "e3d: Cannot find OF node of %s\n",
 254                        pci_name(pdev));
 255                 return -ENODEV;
 256         }
 257
 258         device_type = of_get_property(of_node, "device_type", NULL);
 259         if (!device_type) {
 260                 printk(KERN_INFO "e3d: Ignoring secondary output device "
 261                        "at %s\n", pci_name(pdev));
 262                 return -ENODEV;
 263         }
 264
 265         err = pci_enable_device(pdev);
 266         if (err < 0) {
 267                 printk(KERN_ERR "e3d: Cannot enable PCI device %s\n",
 268                        pci_name(pdev));
 269                 goto err_out;
 270         }
 271
 272         info = framebuffer_alloc(sizeof(struct e3d_info), &pdev->dev);
 273         if (!info) {
 274                 printk(KERN_ERR "e3d: Cannot allocate fb_info\n");
 275                 err = -ENOMEM;
 276                 goto err_disable;
 277         }
 278
 279         ep = info->par;
 280         ep->info = info;
 281         ep->pdev = pdev;
 282         spin_lock_init(&ep->lock);
 283         ep->of_node = of_node;
 284
 285         /* Read the PCI base register of the frame buffer, which we
 286          * need in order to interpret the RAMDAC_VID_*FB* values in
 287          * the ramdac correctly.
 288          */
 289         pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0,
 290                               &ep->fb_base_reg);
 291         ep->fb_base_reg &= PCI_BASE_ADDRESS_MEM_MASK;
 292
 293         ep->regs_base_phys = pci_resource_start (pdev, 1);
 294         err = pci_request_region(pdev, 1, "e3d regs");
 295         if (err < 0) {
 296                 printk("e3d: Cannot request region 1 for %s\n",
 297                        pci_name(pdev));
 298                 goto err_release_fb;
 299         }
 300         ep->ramdac = ioremap(ep->regs_base_phys + 0x8000, 0x1000);
 301         if (!ep->ramdac) {
 302                 err = -ENOMEM;
 303                 goto err_release_pci1;
 304         }
 305
 306         ep->fb8_0_off = readl(ep->ramdac + RAMDAC_VID_8FB_0);
 307         ep->fb8_0_off -= ep->fb_base_reg;
 308
 309         ep->fb8_1_off = readl(ep->ramdac + RAMDAC_VID_8FB_1);
 310         ep->fb8_1_off -= ep->fb_base_reg;
 311
 312         ep->fb8_buf_diff = ep->fb8_1_off - ep->fb8_0_off;
 313
 314         ep->fb_base_phys = pci_resource_start (pdev, 0);
 315         ep->fb_base_phys += ep->fb8_0_off;
 316
 317         err = pci_request_region(pdev, 0, "e3d framebuffer");
 318         if (err < 0) {
 319                 printk("e3d: Cannot request region 0 for %s\n",
 320                        pci_name(pdev));
 321                 goto err_unmap_ramdac;
 322         }
 323
 324         err = e3d_get_props(ep);
 325         if (err)
 326                 goto err_release_pci0;
 327
 328         line_length = (readl(ep->ramdac + RAMDAC_VID_CFG) >> 16) & 0xff;
 329         line_length = 1 << line_length;
 330
 331         switch (ep->depth) {
 332         case 8:
 333                 info->fix.line_length = line_length;
 334                 break;
 335         case 16:
 336                 info->fix.line_length = line_length * 2;
 337                 break;
 338         case 24:
 339                 info->fix.line_length = line_length * 3;
 340                 break;
 341         case 32:
 342                 info->fix.line_length = line_length * 4;
 343                 break;
 344         }
 345         ep->fb_size = info->fix.line_length * ep->height;
 346
 347         ep->fb_base = ioremap(ep->fb_base_phys, ep->fb_size);
 348         if (!ep->fb_base) {
 349                 err = -ENOMEM;
 350                 goto err_release_pci0;
 351         }
 352
 353         err = e3d_set_fbinfo(ep);
 354         if (err)
 355                 goto err_unmap_fb;
 356
 357         pci_set_drvdata(pdev, info);
 358
 359         printk("e3d: Found device at %s\n", pci_name(pdev));
 360
 361         err = register_framebuffer(info);
 362         if (err < 0) {
 363                 printk(KERN_ERR "e3d: Could not register framebuffer %s\n",
 364                        pci_name(pdev));
 365                 goto err_free_cmap;
 366         }
 367
 368         return 0;
 369
 370 err_free_cmap:
 371         fb_dealloc_cmap(&info->cmap);
 372
 373 err_unmap_fb:
 374         iounmap(ep->fb_base);
 375
 376 err_release_pci0:
 377         pci_release_region(pdev, 0);
 378
 379 err_unmap_ramdac:
 380         iounmap(ep->ramdac);
 381
 382 err_release_pci1:
 383         pci_release_region(pdev, 1);
 384
 385 err_release_fb:
 386         framebuffer_release(info);
 387
 388 err_disable:
 389         pci_disable_device(pdev);
 390
 391 err_out:
 392         return err;
 393 }
 394
 395 static void e3d_pci_unregister(struct pci_dev *pdev)
 396 {
 397         struct fb_info *info = pci_get_drvdata(pdev);
 398         struct e3d_info *ep = info->par;
 399
 400         unregister_framebuffer(info);
 401
 402         iounmap(ep->ramdac);
 403         iounmap(ep->fb_base);
 404
 405         pci_release_region(pdev, 0);
 406         pci_release_region(pdev, 1);
 407
 408         fb_dealloc_cmap(&info->cmap);
 409         framebuffer_release(info);
 410
 411         pci_disable_device(pdev);
 412 }
 413
 414 static struct pci_device_id e3d_pci_table[] = {
 415         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0),        },
 416         {       PCI_DEVICE(0x1091, 0x7a0),                      },
 417         {       PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2),        },
 418         {       .vendor = PCI_VENDOR_ID_3DLABS,
 419                 .device = PCI_ANY_ID,
 420                 .subvendor = PCI_VENDOR_ID_3DLABS,
 421                 .subdevice = 0x0108,
 422         },
 423         {       .vendor = PCI_VENDOR_ID_3DLABS,
 424                 .device = PCI_ANY_ID,
 425                 .subvendor = PCI_VENDOR_ID_3DLABS,
 426                 .subdevice = 0x0140,
 427         },
 428         {       .vendor = PCI_VENDOR_ID_3DLABS,
 429                 .device = PCI_ANY_ID,
 430                 .subvendor = PCI_VENDOR_ID_3DLABS,
 431                 .subdevice = 0x1024,
 432         },
 433         { 0, }
 434 };
 435
 436 static struct pci_driver e3d_driver = {
 437         .name           = "e3d",
 438         .id_table       = e3d_pci_table,
 439         .probe          = e3d_pci_register,
 440         .remove         = e3d_pci_unregister,
 441 };
 442
 443 static int __init e3d_init(void)
 444 {
 445         if (fb_get_options("e3d", NULL))
 446                 return -ENODEV;
 447
 448         return pci_register_driver(&e3d_driver);
 449 }
 450
 451 static void __exit e3d_exit(void)
 452 {
 453         pci_unregister_driver(&e3d_driver);
 454 }
 455
 456 module_init(e3d_init);
 457 module_exit(e3d_exit);
 458
 459 MODULE_DESCRIPTION("framebuffer driver for Sun XVR-500 graphics");
 460 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 461 MODULE_VERSION("1.0");
 462 MODULE_LICENSE("GPL");