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 };
  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 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 226         struct device_node *macos_display = NULL;
 227 #endif
 228         if (fb_get_options("offb", NULL))
 229                 return -ENODEV;
 230
 231 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
 232         /* If we're booted from BootX... */
 233         if (boot_infos != 0) {
 234                 unsigned long addr =
 235                     (unsigned long) boot_infos->dispDeviceBase;
 236                 /* find the device node corresponding to the macos display */
 237                 while ((dp = of_find_node_by_type(dp, "display"))) {
 238                         int i;
 239                         /*
 240                          * Grrr...  It looks like the MacOS ATI driver
 241                          * munges the assigned-addresses property (but
 242                          * the AAPL,address value is OK).
 243                          */
 244                         if (strncmp(dp->name, "ATY,", 4) == 0
 245                             && dp->n_addrs == 1) {
 246                                 unsigned int *ap =
 247                                     (unsigned int *) get_property(dp,
 248                                                                   "AAPL,address",
 249                                                                   NULL);
 250                                 if (ap != NULL) {
 251                                         dp->addrs[0].address = *ap;
 252                                         dp->addrs[0].size = 0x01000000;
 253                                 }
 254                         }
 255
 256                         /*
 257                          * The LTPro on the Lombard powerbook has no addresses
 258                          * on the display nodes, they are on their parent.
 259                          */
 260                         if (dp->n_addrs == 0
 261                             && device_is_compatible(dp, "ATY,264LTPro")) {
 262                                 int na;
 263                                 unsigned int *ap = (unsigned int *)
 264                                     get_property(dp, "AAPL,address", &na);
 265                                 if (ap != 0)
 266                                         for (na /= sizeof(unsigned int);
 267                                              na > 0; --na, ++ap)
 268                                                 if (*ap <= addr
 269                                                     && addr <
 270                                                     *ap + 0x1000000)
 271                                                         goto foundit;
 272                         }
 273
 274                         /*
 275                          * See if the display address is in one of the address
 276                          * ranges for this display.
 277                          */
 278                         for (i = 0; i < dp->n_addrs; ++i) {
 279                                 if (dp->addrs[i].address <= addr
 280                                     && addr <
 281                                     dp->addrs[i].address +
 282                                     dp->addrs[i].size)
 283                                         break;
 284                         }
 285                         if (i < dp->n_addrs) {
 286                               foundit:
 287                                 printk(KERN_INFO "MacOS display is %s\n",
 288                                        dp->full_name);
 289                                 macos_display = dp;
 290                                 break;
 291                         }
 292                 }
 293
 294                 /* initialize it */
 295                 offb_init_fb(macos_display ? macos_display->
 296                              name : "MacOS display",
 297                              macos_display ? macos_display->
 298                              full_name : "MacOS display",
 299                              boot_infos->dispDeviceRect[2],
 300                              boot_infos->dispDeviceRect[3],
 301                              boot_infos->dispDeviceDepth,
 302                              boot_infos->dispDeviceRowBytes, addr, NULL);
 303         }
 304 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
 305
 306         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 307                 if (get_property(dp, "linux,opened", NULL) &&
 308                     get_property(dp, "linux,boot-display", NULL)) {
 309                         boot_disp = dp;
 310                         offb_init_nodriver(dp);
 311                 }
 312         }
 313         for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
 314                 if (get_property(dp, "linux,opened", NULL) &&
 315                     dp != boot_disp)
 316                         offb_init_nodriver(dp);
 317         }
 318
 319         return 0;
 320 }
 321
 322
 323 static void __init offb_init_nodriver(struct device_node *dp)
 324 {
 325         int *pp, i;
 326         unsigned int len;
 327         int width = 640, height = 480, depth = 8, pitch;
 328         unsigned *up;
 329         unsigned long address;
 330
 331         if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
 332             && len == sizeof(int))
 333                 depth = *pp;
 334         if ((pp = (int *) get_property(dp, "width", &len)) != NULL
 335             && len == sizeof(int))
 336                 width = *pp;
 337         if ((pp = (int *) get_property(dp, "height", &len)) != NULL
 338             && len == sizeof(int))
 339                 height = *pp;
 340         if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
 341             && len == sizeof(int)) {
 342                 pitch = *pp;
 343                 if (pitch == 1)
 344                         pitch = 0x1000;
 345         } else
 346                 pitch = width;
 347         if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
 348             && len == sizeof(unsigned))
 349                 address = (u_long) * up;
 350         else {
 351                 for (i = 0; i < dp->n_addrs; ++i)
 352                         if (dp->addrs[i].size >=
 353                             pitch * height * depth / 8)
 354                                 break;
 355                 if (i >= dp->n_addrs) {
 356                         printk(KERN_ERR
 357                                "no framebuffer address found for %s\n",
 358                                dp->full_name);
 359                         return;
 360                 }
 361
 362                 address = (u_long) dp->addrs[i].address;
 363
 364 #ifdef CONFIG_PPC64
 365                 address += ((struct pci_dn *)dp->data)->phb->pci_mem_offset;
 366 #endif
 367
 368                 /* kludge for valkyrie */
 369                 if (strcmp(dp->name, "valkyrie") == 0)
 370                         address += 0x1000;
 371         }
 372         offb_init_fb(dp->name, dp->full_name, width, height, depth,
 373                      pitch, address, dp);
 374
 375 }
 376
 377 static void __init offb_init_fb(const char *name, const char *full_name,
 378                                 int width, int height, int depth,
 379                                 int pitch, unsigned long address,
 380                                 struct device_node *dp)
 381 {
 382         unsigned long res_size = pitch * height * depth / 8;
 383         struct offb_par *par = &default_par;
 384         unsigned long res_start = address;
 385         struct fb_fix_screeninfo *fix;
 386         struct fb_var_screeninfo *var;
 387         struct fb_info *info;
 388         int size;
 389
 390         if (!request_mem_region(res_start, res_size, "offb"))
 391                 return;
 392
 393         printk(KERN_INFO
 394                "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
 395                width, height, name, address, depth, pitch);
 396         if (depth != 8 && depth != 16 && depth != 32) {
 397                 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
 398                        depth);
 399                 release_mem_region(res_start, res_size);
 400                 return;
 401         }
 402
 403         size = sizeof(struct fb_info) + sizeof(u32) * 17;
 404
 405         info = kmalloc(size, GFP_ATOMIC);
 406
 407         if (info == 0) {
 408                 release_mem_region(res_start, res_size);
 409                 return;
 410         }
 411         memset(info, 0, size);
 412
 413         fix = &info->fix;
 414         var = &info->var;
 415
 416         strcpy(fix->id, "OFfb ");
 417         strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
 418         fix->id[sizeof(fix->id) - 1] = '\0';
 419
 420         var->xres = var->xres_virtual = width;
 421         var->yres = var->yres_virtual = height;
 422         fix->line_length = pitch;
 423
 424         fix->smem_start = address;
 425         fix->smem_len = pitch * height;
 426         fix->type = FB_TYPE_PACKED_PIXELS;
 427         fix->type_aux = 0;
 428
 429         par->cmap_type = cmap_unknown;
 430         if (depth == 8) {
 431                 /* XXX kludge for ati */
 432                 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
 433                         unsigned long regbase = dp->addrs[2].address;
 434                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 435                         par->cmap_type = cmap_r128;
 436                 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
 437                                   || !strncmp(name, "ATY,RageM3p12A", 14))) {
 438                         unsigned long regbase =
 439                             dp->parent->addrs[2].address;
 440                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 441                         par->cmap_type = cmap_M3A;
 442                 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
 443                         unsigned long regbase =
 444                             dp->parent->addrs[2].address;
 445                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 446                         par->cmap_type = cmap_M3B;
 447                 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
 448                         unsigned long regbase = dp->addrs[1].address;
 449                         par->cmap_adr = ioremap(regbase, 0x1FFF);
 450                         par->cmap_type = cmap_radeon;
 451                 } else if (!strncmp(name, "ATY,", 4)) {
 452                         unsigned long base = address & 0xff000000UL;
 453                         par->cmap_adr =
 454                             ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
 455                         par->cmap_data = par->cmap_adr + 1;
 456                         par->cmap_type = cmap_m64;
 457                 } else if (device_is_compatible(dp, "pci1014,b7")) {
 458                         unsigned long regbase = dp->addrs[0].address;
 459                         par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
 460                         par->cmap_type = cmap_gxt2000;
 461                 }
 462                 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
 463                     : FB_VISUAL_STATIC_PSEUDOCOLOR;
 464         } else
 465                 fix->visual =   /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
 466                                    : */ FB_VISUAL_TRUECOLOR;
 467
 468         var->xoffset = var->yoffset = 0;
 469         var->bits_per_pixel = depth;
 470         switch (depth) {
 471         case 8:
 472                 var->bits_per_pixel = 8;
 473                 var->red.offset = 0;
 474                 var->red.length = 8;
 475                 var->green.offset = 0;
 476                 var->green.length = 8;
 477                 var->blue.offset = 0;
 478                 var->blue.length = 8;
 479                 var->transp.offset = 0;
 480                 var->transp.length = 0;
 481                 break;
 482         case 16:                /* RGB 555 */
 483                 var->bits_per_pixel = 16;
 484                 var->red.offset = 10;
 485                 var->red.length = 5;
 486                 var->green.offset = 5;
 487                 var->green.length = 5;
 488                 var->blue.offset = 0;
 489                 var->blue.length = 5;
 490                 var->transp.offset = 0;
 491                 var->transp.length = 0;
 492                 break;
 493         case 32:                /* RGB 888 */
 494                 var->bits_per_pixel = 32;
 495                 var->red.offset = 16;
 496                 var->red.length = 8;
 497                 var->green.offset = 8;
 498                 var->green.length = 8;
 499                 var->blue.offset = 0;
 500                 var->blue.length = 8;
 501                 var->transp.offset = 24;
 502                 var->transp.length = 8;
 503                 break;
 504         }
 505         var->red.msb_right = var->green.msb_right = var->blue.msb_right =
 506             var->transp.msb_right = 0;
 507         var->grayscale = 0;
 508         var->nonstd = 0;
 509         var->activate = 0;
 510         var->height = var->width = -1;
 511         var->pixclock = 10000;
 512         var->left_margin = var->right_margin = 16;
 513         var->upper_margin = var->lower_margin = 16;
 514         var->hsync_len = var->vsync_len = 8;
 515         var->sync = 0;
 516         var->vmode = FB_VMODE_NONINTERLACED;
 517
 518         info->fbops = &offb_ops;
 519         info->screen_base = ioremap(address, fix->smem_len);
 520         info->par = par;
 521         info->pseudo_palette = (void *) (info + 1);
 522         info->flags = FBINFO_DEFAULT;
 523
 524         fb_alloc_cmap(&info->cmap, 256, 0);
 525
 526         if (register_framebuffer(info) < 0) {
 527                 kfree(info);
 528                 release_mem_region(res_start, res_size);
 529                 return;
 530         }
 531
 532         printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
 533                info->node, full_name);
 534 }
 535
 536 module_init(offb_init);
 537 MODULE_LICENSE("GPL");