drivers/video/offb.c

   1 /*
   2  *  linux/drivers/video/offb.c -- Open Firmware based frame buffer device
   3  *
   4  *      Copyright (C) 1997 Geert Uytterhoeven
   5  *
   6  *  This driver is partly based on the PowerMac console driver:
   7  *
   8  *      Copyright (C) 1996 Paul Mackerras
   9  *
  10  *  This file is subject to the terms and conditions of the GNU General Public
  11  *  License. See the file COPYING in the main directory of this archive for
  12  *  more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/string.h>
  19 #include <linux/mm.h>
  20 #include <linux/tty.h>
  21 #include <linux/slab.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/delay.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/fb.h>
  26 #include <linux/init.h>
  27 #include <linux/ioport.h>
  28 #include <linux/pci.h>
  29 #include <asm/io.h>
  30 #include <asm/prom.h>
  31
  32 #ifdef CONFIG_PPC64
  33 #include <asm/pci-bridge.h>
  34 #endif
  35
  36 #ifdef CONFIG_PPC32
  37 #include <asm/bootx.h>
  38 #endif
  39
  40 #include "macmodes.h"
  41
  42 /* Supported palette hacks */
  43 enum {
  44         cmap_unknown,
  45         cmap_m64,               /* ATI Mach64 */
  46         cmap_r128,              /* ATI Rage128 */
  47         cmap_M3A,               /* ATI Rage Mobility M3 Head A */
  48         cmap_M3B,               /* ATI Rage Mobility M3 Head B */
  49         cmap_radeon,            /* ATI Radeon */
  50         cmap_gxt2000,           /* IBM GXT2000 */
  51 };
  52
  53 struct offb_par {
  54         volatile void __iomem *cmap_adr;
  55         volatile void __iomem *cmap_data;
  56         int cmap_type;
  57         int blanked;
  58 };
  59
  60 struct offb_par default_par;
  61
  62     /*
  63      *  Interface used by the world
  64      */
  65
  66 int offb_init(void);
  67
  68 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  69                           u_int transp, struct fb_info *info);
  70 static int offb_blank(int blank, struct fb_info *info);
  71
  72 #ifdef CONFIG_PPC32
  73 extern boot_infos_t *boot_infos;
  74 #endif
  75
  76 static void offb_init_nodriver(struct device_node *);
  77 static void offb_init_fb(const char *name, const char *full_name,
  78                          int width, int height, int depth, int pitch,
  79                          unsigned long address, struct device_node *dp);
  80
  81 static struct fb_ops offb_ops = {
  82         .owner          = THIS_MODULE,
  83         .fb_setcolreg   = offb_setcolreg,
  84         .fb_blank       = offb_blank,
  85         .fb_fillrect    = cfb_fillrect,
  86         .fb_copyarea    = cfb_copyarea,
  87         .fb_imageblit   = cfb_imageblit,
  88 };
  89
  90     /*
  91      *  Set a single color register. The values supplied are already
  92      *  rounded down to the hardware's capabilities (according to the
  93      *  entries in the var structure). Return != 0 for invalid regno.
  94      */
  95
  96 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  97                           u_int transp, struct fb_info *info)
  98 {
  99         struct offb_par *par = (struct offb_par *) info->par;
 100
 101         if (!par->cmap_adr || regno > 255)
 102                 return 1;
 103
 104         red >>= 8;
 105         green >>= 8;
 106         blue >>= 8;
 107
 108         switch (par->cmap_type) {
 109         case cmap_m64:
 110                 writeb(regno, par->cmap_adr);
 111                 writeb(red, par->cmap_data);
 112                 writeb(green, par->cmap_data);
 113                 writeb(blue, par->cmap_data);
 114                 break;
 115         case cmap_M3A:
 116                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 117                 out_le32(par->cmap_adr + 0x58,
 118                          in_le32(par->cmap_adr + 0x58) & ~0x20);
 119         case cmap_r128:
 120                 /* Set palette index & data */
 121                 out_8(par->cmap_adr + 0xb0, regno);
 122                 out_le32(par->cmap_adr + 0xb4,
 123                          (red << 16 | green << 8 | blue));
 124                 break;
 125         case cmap_M3B:
 126                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 127                 out_le32(par->cmap_adr + 0x58,
 128                          in_le32(par->cmap_adr + 0x58) | 0x20);
 129                 /* Set palette index & data */
 130                 out_8(par->cmap_adr + 0xb0, regno);
 131                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 132                 break;
 133         case cmap_radeon:
 134                 /* Set palette index & data (could be smarter) */
 135                 out_8(par->cmap_adr + 0xb0, regno);
 136                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 137                 break;
 138         case cmap_gxt2000:
 139                 out_le32((unsigned __iomem *) par->cmap_adr + regno,
 140                          (red << 16 | green << 8 | blue));
 141                 break;
 142         }
 143
 144         if (regno < 16)
 145                 switch (info->var.bits_per_pixel) {
 146                 case 16:
 147                         ((u16 *) (info->pseudo_palette))[regno] =
 148                             (regno << 10) | (regno << 5) | regno;
 149                         break;
 150                 case 32:
 151                         {
 152                                 int i = (regno << 8) | regno;
 153                                 ((u32 *) (info->pseudo_palette))[regno] =
 154                                     (i << 16) | i;
 155                                 break;
 156                         }
 157                 }
 158         return 0;
 159 }
 160
 161     /*
 162      *  Blank the display.
 163      */
 164
 165 static int offb_blank(int blank, struct fb_info *info)
 166 {
 167         struct offb_par *par = (struct offb_par *) info->par;
 168         int i, j;
 169
 170         if (!par->cmap_adr)
 171                 return 0;
 172
 173         if (!par->blanked)
 174                 if (!blank)
 175                         return 0;
 176
 177         par->blanked = blank;
 178
 179         if (blank)
 180                 for (i = 0; i < 256; i++) {
 181                         switch (par->cmap_type) {
 182                         case cmap_m64:
 183                                 writeb(i, par->cmap_adr);
 184                                 for (j = 0; j < 3; j++)
 185                                         writeb(0, par->cmap_data);
 186                                 break;
 187                         case cmap_M3A:
 188                                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 189                                 out_le32(par->cmap_adr + 0x58,
 190                                          in_le32(par->cmap_adr + 0x58) & ~0x20);
 191                         case cmap_r128:
 192                                 /* Set palette index & data */
 193                                 out_8(par->cmap_adr + 0xb0, i);
 194                                 out_le32(par->cmap_adr + 0xb4, 0);
 195                                 break;
 196                         case cmap_M3B:
 197                                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 198                                 out_le32(par->cmap_adr + 0x58,
 199                                          in_le32(par->cmap_adr + 0x58) | 0x20);
 200                                 /* Set palette index & data */
 201                                 out_8(par->cmap_adr + 0xb0, i);
 202                                 out_le32(par->cmap_adr + 0xb4, 0);
 203                                 break;
 204                         case cmap_radeon:
 205                                 out_8(par->cmap_adr + 0xb0, i);
 206                                 out_le32(par->cmap_adr + 0xb4, 0);
 207                                 break;
 208                         case cmap_gxt2000:
 209                                 out_le32((unsigned __iomem *) par->cmap_adr + i,
 210                                          0);
 211                                 break;
 212                         }
 213         } else
 214                 fb_set_cmap(&info->cmap, info);
 215         return 0;
 216 }
 217
 218     /*
 219      *  Initialisation
 220      */
 221
 222 int __init offb_init(void)
 223 {
 224         struct device_node *dp = NULL, *boot_disp = NULL;
 225
 226 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 227         struct device_node *macos_display = NULL;
 228 #endif
 229         if (fb_get_options("offb", NULL))
 230                 return -ENODEV;
 231
 232 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 233         /* If we're booted from BootX... */
 234         if (boot_infos != 0) {
 235                 unsigned long addr =
 236                     (unsigned long) boot_infos->dispDeviceBase;
 237                 u32 *addrp;
 238                 u64 daddr, dsize;
 239                 unsigned int flags;
 240
 241                 /* find the device node corresponding to the macos display */
 242                 while ((dp = of_find_node_by_type(dp, "display"))) {
 243                         int i;
 244
 245                         /*
 246                          * Look for an AAPL,address property first.
 247                          */
 248                         unsigned int na;
 249                         unsigned int *ap =
 250                                 (unsigned int *)get_property(dp, "AAPL,address",
 251                                                              &na);
 252                         if (ap != 0) {
 253                                 for (na /= sizeof(unsigned int); na > 0;
 254                                      --na, ++ap)
 255                                         if (*ap <= addr &&
 256                                             addr < *ap + 0x1000000) {
 257                                                 macos_display = dp;
 258                                                 goto foundit;
 259                                         }
 260                         }
 261
 262                         /*
 263                          * See if the display address is in one of the address
 264                          * ranges for this display.
 265                          */
 266                         i = 0;
 267                         for (;;) {
 268                                 addrp = of_get_address(dp, i++, &dsize, &flags);
 269                                 if (addrp == NULL)
 270                                         break;
 271                                 if (!(flags & IORESOURCE_MEM))
 272                                         continue;
 273                                 daddr = of_translate_address(dp, addrp);
 274                                 if (daddr == OF_BAD_ADDR)
 275                                         continue;
 276                                 if (daddr <= addr && addr < (daddr + dsize)) {
 277                                         macos_display = dp;
 278                                         goto foundit;
 279                                 }
 280                         }
 281                 foundit:
 282                         if (macos_display) {
 283                                 printk(KERN_INFO "MacOS display is %s\n",
 284                                        dp->full_name);
 285                                 break;
 286                         }
 287                 }
 288
 289                 /* initialize it */
 290                 offb_init_fb(macos_display ? macos_display->
 291                              name : "MacOS display",
 292                              macos_display ? macos_display->
 293                              full_name : "MacOS display",
 294                              boot_infos->dispDeviceRect[2],
 295                              boot_infos->dispDeviceRect[3],
 296                              boot_infos->dispDeviceDepth,
 297                              boot_infos->dispDeviceRowBytes, addr, NULL);
 298         }
 299 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
 300
 301         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 302                 if (get_property(dp, "linux,opened", NULL) &&
 303                     get_property(dp, "linux,boot-display", NULL)) {
 304                         boot_disp = dp;
 305                         offb_init_nodriver(dp);
 306                 }
 307         }
 308         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 309                 if (get_property(dp, "linux,opened", NULL) &&
 310                     dp != boot_disp)
 311                         offb_init_nodriver(dp);
 312         }
 313
 314         return 0;
 315 }
 316
 317
 318 static void __init offb_init_nodriver(struct device_node *dp)
 319 {
 320         int *pp, i;
 321         unsigned int len;
 322         int width = 640, height = 480, depth = 8, pitch;
 323         unsigned int flags, rsize, *up;
 324         u64 address = OF_BAD_ADDR;
 325         u32 *addrp;
 326         u64 asize;
 327
 328         if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
 329             && len == sizeof(int))
 330                 depth = *pp;
 331         if ((pp = (int *) get_property(dp, "width", &len)) != NULL
 332             && len == sizeof(int))
 333                 width = *pp;
 334         if ((pp = (int *) get_property(dp, "height", &len)) != NULL
 335             && len == sizeof(int))
 336                 height = *pp;
 337         if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
 338             && len == sizeof(int)) {
 339                 pitch = *pp;
 340                 if (pitch == 1)
 341                         pitch = 0x1000;
 342         } else
 343                 pitch = width;
 344
 345        rsize = (unsigned long)pitch * (unsigned long)height *
 346                (unsigned long)(depth / 8);
 347
 348        /* Try to match device to a PCI device in order to get a properly
 349         * translated address rather then trying to decode the open firmware
 350         * stuff in various incorrect ways
 351         */
 352 #ifdef CONFIG_PCI
 353        /* First try to locate the PCI device if any */
 354        {
 355                struct pci_dev *pdev = NULL;
 356
 357                for_each_pci_dev(pdev) {
 358                        if (dp == pci_device_to_OF_node(pdev))
 359                                break;
 360                }
 361                if (pdev) {
 362                        for (i = 0; i < 6 && address == OF_BAD_ADDR; i++) {
 363                                if ((pci_resource_flags(pdev, i) &
 364                                     IORESOURCE_MEM) &&
 365                                    (pci_resource_len(pdev, i) >= rsize))
 366                                        address = pci_resource_start(pdev, i);
 367                        }
 368                        pci_dev_put(pdev);
 369                }
 370         }
 371 #endif /* CONFIG_PCI */
 372
 373        /* This one is dodgy, we may drop it ... */
 374        if (address == OF_BAD_ADDR &&
 375            (up = (unsigned *) get_property(dp, "address", &len)) != NULL &&
 376            len == sizeof(unsigned int))
 377                address = (u64) * up;
 378
 379        if (address == OF_BAD_ADDR) {
 380                for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
 381                             != NULL; i++) {
 382                        if (!(flags & IORESOURCE_MEM))
 383                                continue;
 384                        if (asize >= pitch * height * depth / 8)
 385                                break;
 386                }
 387                 if (addrp == NULL) {
 388                         printk(KERN_ERR
 389                                "no framebuffer address found for %s\n",
 390                                dp->full_name);
 391                         return;
 392                 }
 393                 address = of_translate_address(dp, addrp);
 394                 if (address == OF_BAD_ADDR) {
 395                         printk(KERN_ERR
 396                                "can't translate framebuffer address for %s\n",
 397                                dp->full_name);
 398                         return;
 399                 }
 400
 401                 /* kludge for valkyrie */
 402                 if (strcmp(dp->name, "valkyrie") == 0)
 403                         address += 0x1000;
 404         }
 405         offb_init_fb(dp->name, dp->full_name, width, height, depth,
 406                      pitch, address, dp);
 407
 408 }
 409
 410 static void __init offb_init_fb(const char *name, const char *full_name,
 411                                 int width, int height, int depth,
 412                                 int pitch, unsigned long address,
 413                                 struct device_node *dp)
 414 {
 415         unsigned long res_size = pitch * height * depth / 8;
 416         struct offb_par *par = &default_par;
 417         unsigned long res_start = address;
 418         struct fb_fix_screeninfo *fix;
 419         struct fb_var_screeninfo *var;
 420         struct fb_info *info;
 421         int size;
 422
 423         if (!request_mem_region(res_start, res_size, "offb"))
 424                 return;
 425
 426         printk(KERN_INFO
 427                "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
 428                width, height, name, address, depth, pitch);
 429         if (depth != 8 && depth != 16 && depth != 32) {
 430                 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
 431                        depth);
 432                 release_mem_region(res_start, res_size);
 433                 return;
 434         }
 435
 436         size = sizeof(struct fb_info) + sizeof(u32) * 17;
 437
 438         info = kmalloc(size, GFP_ATOMIC);
 439
 440         if (info == 0) {
 441                 release_mem_region(res_start, res_size);
 442                 return;
 443         }
 444         memset(info, 0, size);
 445
 446         fix = &info->fix;
 447         var = &info->var;
 448
 449         strcpy(fix->id, "OFfb ");
 450         strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
 451         fix->id[sizeof(fix->id) - 1] = '\0';
 452
 453         var->xres = var->xres_virtual = width;
 454         var->yres = var->yres_virtual = height;
 455         fix->line_length = pitch;
 456
 457         fix->smem_start = address;
 458         fix->smem_len = pitch * height;
 459         fix->type = FB_TYPE_PACKED_PIXELS;
 460         fix->type_aux = 0;
 461
 462         par->cmap_type = cmap_unknown;
 463         if (depth == 8) {
 464
 465                 /* Palette hacks disabled for now */
 466 #if 0
 467                 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
 468                         unsigned long regbase = dp->addrs[2].address;
 469                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 470                         par->cmap_type = cmap_r128;
 471                 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
 472                                   || !strncmp(name, "ATY,RageM3p12A", 14))) {
 473                         unsigned long regbase =
 474                             dp->parent->addrs[2].address;
 475                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 476                         par->cmap_type = cmap_M3A;
 477                 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
 478                         unsigned long regbase =
 479                             dp->parent->addrs[2].address;
 480                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 481                         par->cmap_type = cmap_M3B;
 482                 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
 483                         unsigned long regbase = dp->addrs[1].address;
 484                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 485                         par->cmap_type = cmap_radeon;
 486                 } else if (!strncmp(name, "ATY,", 4)) {
 487                         unsigned long base = address & 0xff000000UL;
 488                         par->cmap_adr =
 489                             ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
 490                         par->cmap_data = par->cmap_adr + 1;
 491                         par->cmap_type = cmap_m64;
 492                 } else if (device_is_compatible(dp, "pci1014,b7")) {
 493                         unsigned long regbase = dp->addrs[0].address;
 494                         par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
 495                         par->cmap_type = cmap_gxt2000;
 496                 }
 497 #endif
 498                 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
 499                     : FB_VISUAL_STATIC_PSEUDOCOLOR;
 500         } else
 501                 fix->visual =   /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
 502                                    : */ FB_VISUAL_TRUECOLOR;
 503
 504         var->xoffset = var->yoffset = 0;
 505         var->bits_per_pixel = depth;
 506         switch (depth) {
 507         case 8:
 508                 var->bits_per_pixel = 8;
 509                 var->red.offset = 0;
 510                 var->red.length = 8;
 511                 var->green.offset = 0;
 512                 var->green.length = 8;
 513                 var->blue.offset = 0;
 514                 var->blue.length = 8;
 515                 var->transp.offset = 0;
 516                 var->transp.length = 0;
 517                 break;
 518         case 16:                /* RGB 555 */
 519                 var->bits_per_pixel = 16;
 520                 var->red.offset = 10;
 521                 var->red.length = 5;
 522                 var->green.offset = 5;
 523                 var->green.length = 5;
 524                 var->blue.offset = 0;
 525                 var->blue.length = 5;
 526                 var->transp.offset = 0;
 527                 var->transp.length = 0;
 528                 break;
 529         case 32:                /* RGB 888 */
 530                 var->bits_per_pixel = 32;
 531                 var->red.offset = 16;
 532                 var->red.length = 8;
 533                 var->green.offset = 8;
 534                 var->green.length = 8;
 535                 var->blue.offset = 0;
 536                 var->blue.length = 8;
 537                 var->transp.offset = 24;
 538                 var->transp.length = 8;
 539                 break;
 540         }
 541         var->red.msb_right = var->green.msb_right = var->blue.msb_right =
 542             var->transp.msb_right = 0;
 543         var->grayscale = 0;
 544         var->nonstd = 0;
 545         var->activate = 0;
 546         var->height = var->width = -1;
 547         var->pixclock = 10000;
 548         var->left_margin = var->right_margin = 16;
 549         var->upper_margin = var->lower_margin = 16;
 550         var->hsync_len = var->vsync_len = 8;
 551         var->sync = 0;
 552         var->vmode = FB_VMODE_NONINTERLACED;
 553
 554         info->fbops = &offb_ops;
 555         info->screen_base = ioremap(address, fix->smem_len);
 556         info->par = par;
 557         info->pseudo_palette = (void *) (info + 1);
 558         info->flags = FBINFO_DEFAULT;
 559
 560         fb_alloc_cmap(&info->cmap, 256, 0);
 561
 562         if (register_framebuffer(info) < 0) {
 563                 kfree(info);
 564                 release_mem_region(res_start, res_size);
 565                 return;
 566         }
 567
 568         printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
 569                info->node, full_name);
 570 }
 571
 572 module_init(offb_init);
 573 MODULE_LICENSE("GPL");