git.oblomov.eu Git - linux-2.6/blob - 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/config.h>
  16 #include <linux/module.h>
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19 #include <linux/string.h>
  20 #include <linux/mm.h>
  21 #include <linux/tty.h>
  22 #include <linux/slab.h>
  23 #include <linux/vmalloc.h>
  24 #include <linux/delay.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/fb.h>
  27 #include <linux/init.h>
  28 #include <linux/ioport.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         .fb_cursor      = soft_cursor,
  89 };
  90
  91     /*
  92      *  Set a single color register. The values supplied are already
  93      *  rounded down to the hardware's capabilities (according to the
  94      *  entries in the var structure). Return != 0 for invalid regno.
  95      */
  96
  97 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  98                           u_int transp, struct fb_info *info)
  99 {
 100         struct offb_par *par = (struct offb_par *) info->par;
 101
 102         if (!par->cmap_adr || regno > 255)
 103                 return 1;
 104
 105         red >>= 8;
 106         green >>= 8;
 107         blue >>= 8;
 108
 109         switch (par->cmap_type) {
 110         case cmap_m64:
 111                 writeb(regno, par->cmap_adr);
 112                 writeb(red, par->cmap_data);
 113                 writeb(green, par->cmap_data);
 114                 writeb(blue, par->cmap_data);
 115                 break;
 116         case cmap_M3A:
 117                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 118                 out_le32(par->cmap_adr + 0x58,
 119                          in_le32(par->cmap_adr + 0x58) & ~0x20);
 120         case cmap_r128:
 121                 /* Set palette index & data */
 122                 out_8(par->cmap_adr + 0xb0, regno);
 123                 out_le32(par->cmap_adr + 0xb4,
 124                          (red << 16 | green << 8 | blue));
 125                 break;
 126         case cmap_M3B:
 127                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 128                 out_le32(par->cmap_adr + 0x58,
 129                          in_le32(par->cmap_adr + 0x58) | 0x20);
 130                 /* Set palette index & data */
 131                 out_8(par->cmap_adr + 0xb0, regno);
 132                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 133                 break;
 134         case cmap_radeon:
 135                 /* Set palette index & data (could be smarter) */
 136                 out_8(par->cmap_adr + 0xb0, regno);
 137                 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
 138                 break;
 139         case cmap_gxt2000:
 140                 out_le32((unsigned __iomem *) par->cmap_adr + regno,
 141                          (red << 16 | green << 8 | blue));
 142                 break;
 143         }
 144
 145         if (regno < 16)
 146                 switch (info->var.bits_per_pixel) {
 147                 case 16:
 148                         ((u16 *) (info->pseudo_palette))[regno] =
 149                             (regno << 10) | (regno << 5) | regno;
 150                         break;
 151                 case 32:
 152                         {
 153                                 int i = (regno << 8) | regno;
 154                                 ((u32 *) (info->pseudo_palette))[regno] =
 155                                     (i << 16) | i;
 156                                 break;
 157                         }
 158                 }
 159         return 0;
 160 }
 161
 162     /*
 163      *  Blank the display.
 164      */
 165
 166 static int offb_blank(int blank, struct fb_info *info)
 167 {
 168         struct offb_par *par = (struct offb_par *) info->par;
 169         int i, j;
 170
 171         if (!par->cmap_adr)
 172                 return 0;
 173
 174         if (!par->blanked)
 175                 if (!blank)
 176                         return 0;
 177
 178         par->blanked = blank;
 179
 180         if (blank)
 181                 for (i = 0; i < 256; i++) {
 182                         switch (par->cmap_type) {
 183                         case cmap_m64:
 184                                 writeb(i, par->cmap_adr);
 185                                 for (j = 0; j < 3; j++)
 186                                         writeb(0, par->cmap_data);
 187                                 break;
 188                         case cmap_M3A:
 189                                 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 190                                 out_le32(par->cmap_adr + 0x58,
 191                                          in_le32(par->cmap_adr + 0x58) & ~0x20);
 192                         case cmap_r128:
 193                                 /* Set palette index & data */
 194                                 out_8(par->cmap_adr + 0xb0, i);
 195                                 out_le32(par->cmap_adr + 0xb4, 0);
 196                                 break;
 197                         case cmap_M3B:
 198                                 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
 199                                 out_le32(par->cmap_adr + 0x58,
 200                                          in_le32(par->cmap_adr + 0x58) | 0x20);
 201                                 /* Set palette index & data */
 202                                 out_8(par->cmap_adr + 0xb0, i);
 203                                 out_le32(par->cmap_adr + 0xb4, 0);
 204                                 break;
 205                         case cmap_radeon:
 206                                 out_8(par->cmap_adr + 0xb0, i);
 207                                 out_le32(par->cmap_adr + 0xb4, 0);
 208                                 break;
 209                         case cmap_gxt2000:
 210                                 out_le32((unsigned __iomem *) par->cmap_adr + i,
 211                                          0);
 212                                 break;
 213                         }
 214         } else
 215                 fb_set_cmap(&info->cmap, info);
 216         return 0;
 217 }
 218
 219     /*
 220      *  Initialisation
 221      */
 222
 223 int __init offb_init(void)
 224 {
 225         struct device_node *dp = NULL, *boot_disp = NULL;
 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                 /* find the device node corresponding to the macos display */
 238                 while ((dp = of_find_node_by_type(dp, "display"))) {
 239                         int i;
 240                         /*
 241                          * Grrr...  It looks like the MacOS ATI driver
 242                          * munges the assigned-addresses property (but
 243                          * the AAPL,address value is OK).
 244                          */
 245                         if (strncmp(dp->name, "ATY,", 4) == 0
 246                             && dp->n_addrs == 1) {
 247                                 unsigned int *ap =
 248                                     (unsigned int *) get_property(dp,
 249                                                                   "AAPL,address",
 250                                                                   NULL);
 251                                 if (ap != NULL) {
 252                                         dp->addrs[0].address = *ap;
 253                                         dp->addrs[0].size = 0x01000000;
 254                                 }
 255                         }
 256
 257                         /*
 258                          * The LTPro on the Lombard powerbook has no addresses
 259                          * on the display nodes, they are on their parent.
 260                          */
 261                         if (dp->n_addrs == 0
 262                             && device_is_compatible(dp, "ATY,264LTPro")) {
 263                                 int na;
 264                                 unsigned int *ap = (unsigned int *)
 265                                     get_property(dp, "AAPL,address", &na);
 266                                 if (ap != 0)
 267                                         for (na /= sizeof(unsigned int);
 268                                              na > 0; --na, ++ap)
 269                                                 if (*ap <= addr
 270                                                     && addr <
 271                                                     *ap + 0x1000000)
 272                                                         goto foundit;
 273                         }
 274
 275                         /*
 276                          * See if the display address is in one of the address
 277                          * ranges for this display.
 278                          */
 279                         for (i = 0; i < dp->n_addrs; ++i) {
 280                                 if (dp->addrs[i].address <= addr
 281                                     && addr <
 282                                     dp->addrs[i].address +
 283                                     dp->addrs[i].size)
 284                                         break;
 285                         }
 286                         if (i < dp->n_addrs) {
 287                               foundit:
 288                                 printk(KERN_INFO "MacOS display is %s\n",
 289                                        dp->full_name);
 290                                 macos_display = dp;
 291                                 break;
 292                         }
 293                 }
 294
 295                 /* initialize it */
 296                 offb_init_fb(macos_display ? macos_display->
 297                              name : "MacOS display",
 298                              macos_display ? macos_display->
 299                              full_name : "MacOS display",
 300                              boot_infos->dispDeviceRect[2],
 301                              boot_infos->dispDeviceRect[3],
 302                              boot_infos->dispDeviceDepth,
 303                              boot_infos->dispDeviceRowBytes, addr, NULL);
 304         }
 305 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
 306
 307         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 308                 if (get_property(dp, "linux,opened", NULL) &&
 309                     get_property(dp, "linux,boot-display", NULL)) {
 310                         boot_disp = dp;
 311                         offb_init_nodriver(dp);
 312                 }
 313         }
 314         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 315                 if (get_property(dp, "linux,opened", NULL) &&
 316                     dp != boot_disp)
 317                         offb_init_nodriver(dp);
 318         }
 319
 320         return 0;
 321 }
 322
 323
 324 static void __init offb_init_nodriver(struct device_node *dp)
 325 {
 326         int *pp, i;
 327         unsigned int len;
 328         int width = 640, height = 480, depth = 8, pitch;
 329         unsigned *up;
 330         unsigned long address;
 331
 332         if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
 333             && len == sizeof(int))
 334                 depth = *pp;
 335         if ((pp = (int *) get_property(dp, "width", &len)) != NULL
 336             && len == sizeof(int))
 337                 width = *pp;
 338         if ((pp = (int *) get_property(dp, "height", &len)) != NULL
 339             && len == sizeof(int))
 340                 height = *pp;
 341         if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
 342             && len == sizeof(int)) {
 343                 pitch = *pp;
 344                 if (pitch == 1)
 345                         pitch = 0x1000;
 346         } else
 347                 pitch = width;
 348         if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
 349             && len == sizeof(unsigned))
 350                 address = (u_long) * up;
 351         else {
 352                 for (i = 0; i < dp->n_addrs; ++i)
 353                         if (dp->addrs[i].size >=
 354                             pitch * height * depth / 8)
 355                                 break;
 356                 if (i >= dp->n_addrs) {
 357                         printk(KERN_ERR
 358                                "no framebuffer address found for %s\n",
 359                                dp->full_name);
 360                         return;
 361                 }
 362
 363                 address = (u_long) dp->addrs[i].address;
 364
 365 #ifdef CONFIG_PPC64
 366                 address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
 367 #endif
 368
 369                 /* kludge for valkyrie */
 370                 if (strcmp(dp->name, "valkyrie") == 0)
 371                         address += 0x1000;
 372         }
 373         offb_init_fb(dp->name, dp->full_name, width, height, depth,
 374                      pitch, address, dp);
 375
 376 }
 377
 378 static void __init offb_init_fb(const char *name, const char *full_name,
 379                                 int width, int height, int depth,
 380                                 int pitch, unsigned long address,
 381                                 struct device_node *dp)
 382 {
 383         unsigned long res_size = pitch * height * depth / 8;
 384         struct offb_par *par = &default_par;
 385         unsigned long res_start = address;
 386         struct fb_fix_screeninfo *fix;
 387         struct fb_var_screeninfo *var;
 388         struct fb_info *info;
 389         int size;
 390
 391         if (!request_mem_region(res_start, res_size, "offb"))
 392                 return;
 393
 394         printk(KERN_INFO
 395                "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
 396                width, height, name, address, depth, pitch);
 397         if (depth != 8 && depth != 16 && depth != 32) {
 398                 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
 399                        depth);
 400                 release_mem_region(res_start, res_size);
 401                 return;
 402         }
 403
 404         size = sizeof(struct fb_info) + sizeof(u32) * 17;
 405
 406         info = kmalloc(size, GFP_ATOMIC);
 407
 408         if (info == 0) {
 409                 release_mem_region(res_start, res_size);
 410                 return;
 411         }
 412         memset(info, 0, size);
 413
 414         fix = &info->fix;
 415         var = &info->var;
 416
 417         strcpy(fix->id, "OFfb ");
 418         strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
 419         fix->id[sizeof(fix->id) - 1] = '\0';
 420
 421         var->xres = var->xres_virtual = width;
 422         var->yres = var->yres_virtual = height;
 423         fix->line_length = pitch;
 424
 425         fix->smem_start = address;
 426         fix->smem_len = pitch * height;
 427         fix->type = FB_TYPE_PACKED_PIXELS;
 428         fix->type_aux = 0;
 429
 430         par->cmap_type = cmap_unknown;
 431         if (depth == 8) {
 432                 /* XXX kludge for ati */
 433                 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
 434                         unsigned long regbase = dp->addrs[2].address;
 435                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 436                         par->cmap_type = cmap_r128;
 437                 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
 438                                   || !strncmp(name, "ATY,RageM3p12A", 14))) {
 439                         unsigned long regbase =
 440                             dp->parent->addrs[2].address;
 441                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 442                         par->cmap_type = cmap_M3A;
 443                 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
 444                         unsigned long regbase =
 445                             dp->parent->addrs[2].address;
 446                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 447                         par->cmap_type = cmap_M3B;
 448                 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
 449                         unsigned long regbase = dp->addrs[1].address;
 450                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 451                         par->cmap_type = cmap_radeon;
 452                 } else if (!strncmp(name, "ATY,", 4)) {
 453                         unsigned long base = address & 0xff000000UL;
 454                         par->cmap_adr =
 455                             ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
 456                         par->cmap_data = par->cmap_adr + 1;
 457                         par->cmap_type = cmap_m64;
 458                 } else if (device_is_compatible(dp, "pci1014,b7")) {
 459                         unsigned long regbase = dp->addrs[0].address;
 460                         par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
 461                         par->cmap_type = cmap_gxt2000;
 462                 }
 463                 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
 464                     : FB_VISUAL_STATIC_PSEUDOCOLOR;
 465         } else
 466                 fix->visual =   /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
 467                                    : */ FB_VISUAL_TRUECOLOR;
 468
 469         var->xoffset = var->yoffset = 0;
 470         var->bits_per_pixel = depth;
 471         switch (depth) {
 472         case 8:
 473                 var->bits_per_pixel = 8;
 474                 var->red.offset = 0;
 475                 var->red.length = 8;
 476                 var->green.offset = 0;
 477                 var->green.length = 8;
 478                 var->blue.offset = 0;
 479                 var->blue.length = 8;
 480                 var->transp.offset = 0;
 481                 var->transp.length = 0;
 482                 break;
 483         case 16:                /* RGB 555 */
 484                 var->bits_per_pixel = 16;
 485                 var->red.offset = 10;
 486                 var->red.length = 5;
 487                 var->green.offset = 5;
 488                 var->green.length = 5;
 489                 var->blue.offset = 0;
 490                 var->blue.length = 5;
 491                 var->transp.offset = 0;
 492                 var->transp.length = 0;
 493                 break;
 494         case 32:                /* RGB 888 */
 495                 var->bits_per_pixel = 32;
 496                 var->red.offset = 16;
 497                 var->red.length = 8;
 498                 var->green.offset = 8;
 499                 var->green.length = 8;
 500                 var->blue.offset = 0;
 501                 var->blue.length = 8;
 502                 var->transp.offset = 24;
 503                 var->transp.length = 8;
 504                 break;
 505         }
 506         var->red.msb_right = var->green.msb_right = var->blue.msb_right =
 507             var->transp.msb_right = 0;
 508         var->grayscale = 0;
 509         var->nonstd = 0;
 510         var->activate = 0;
 511         var->height = var->width = -1;
 512         var->pixclock = 10000;
 513         var->left_margin = var->right_margin = 16;
 514         var->upper_margin = var->lower_margin = 16;
 515         var->hsync_len = var->vsync_len = 8;
 516         var->sync = 0;
 517         var->vmode = FB_VMODE_NONINTERLACED;
 518
 519         info->fbops = &offb_ops;
 520         info->screen_base = ioremap(address, fix->smem_len);
 521         info->par = par;
 522         info->pseudo_palette = (void *) (info + 1);
 523         info->flags = FBINFO_DEFAULT;
 524
 525         fb_alloc_cmap(&info->cmap, 256, 0);
 526
 527         if (register_framebuffer(info) < 0) {
 528                 kfree(info);
 529                 release_mem_region(res_start, res_size);
 530                 return;
 531         }
 532
 533         printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
 534                info->node, full_name);
 535 }
 536
 537 module_init(offb_init);
 538 MODULE_LICENSE("GPL");