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/vmalloc.h> 21#include <linux/delay.h> 22#include <linux/of.h> 23#include <linux/of_address.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 31#ifdef CONFIG_PPC64 32#include <asm/pci-bridge.h> 33#endif 34 35#ifdef CONFIG_PPC32 36#include <asm/bootx.h> 37#endif 38 39#include "macmodes.h" 40 41/* Supported palette hacks */ 42enum { 43 cmap_unknown, 44 cmap_m64, /* ATI Mach64 */ 45 cmap_r128, /* ATI Rage128 */ 46 cmap_M3A, /* ATI Rage Mobility M3 Head A */ 47 cmap_M3B, /* ATI Rage Mobility M3 Head B */ 48 cmap_radeon, /* ATI Radeon */ 49 cmap_gxt2000, /* IBM GXT2000 */ 50 cmap_avivo, /* ATI R5xx */ 51}; 52 53struct offb_par { 54 volatile void __iomem *cmap_adr; 55 volatile void __iomem *cmap_data; 56 int cmap_type; 57 int blanked; 58}; 59 60struct offb_par default_par; 61 62#ifdef CONFIG_PPC32 63extern boot_infos_t *boot_infos; 64#endif 65 66/* Definitions used by the Avivo palette hack */ 67#define AVIVO_DC_LUT_RW_SELECT 0x6480 68#define AVIVO_DC_LUT_RW_MODE 0x6484 69#define AVIVO_DC_LUT_RW_INDEX 0x6488 70#define AVIVO_DC_LUT_SEQ_COLOR 0x648c 71#define AVIVO_DC_LUT_PWL_DATA 0x6490 72#define AVIVO_DC_LUT_30_COLOR 0x6494 73#define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498 74#define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c 75#define AVIVO_DC_LUT_AUTOFILL 0x64a0 76 77#define AVIVO_DC_LUTA_CONTROL 0x64c0 78#define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4 79#define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8 80#define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc 81#define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0 82#define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4 83#define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8 84 85#define AVIVO_DC_LUTB_CONTROL 0x6cc0 86#define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4 87#define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8 88#define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc 89#define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0 90#define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4 91#define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8 92 93 /* 94 * Set a single color register. The values supplied are already 95 * rounded down to the hardware's capabilities (according to the 96 * entries in the var structure). Return != 0 for invalid regno. 97 */ 98 99static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 100 u_int transp, struct fb_info *info) 101{ 102 struct offb_par *par = (struct offb_par *) info->par; 103 int i, depth; 104 u32 *pal = info->pseudo_palette; 105 106 depth = info->var.bits_per_pixel; 107 if (depth == 16) 108 depth = (info->var.green.length == 5) ? 15 : 16; 109 110 if (regno > 255 || 111 (depth == 16 && regno > 63) || 112 (depth == 15 && regno > 31)) 113 return 1; 114 115 if (regno < 16) { 116 switch (depth) { 117 case 15: 118 pal[regno] = (regno << 10) | (regno << 5) | regno; 119 break; 120 case 16: 121 pal[regno] = (regno << 11) | (regno << 5) | regno; 122 break; 123 case 24: 124 pal[regno] = (regno << 16) | (regno << 8) | regno; 125 break; 126 case 32: 127 i = (regno << 8) | regno; 128 pal[regno] = (i << 16) | i; 129 break; 130 } 131 } 132 133 red >>= 8; 134 green >>= 8; 135 blue >>= 8; 136 137 if (!par->cmap_adr) 138 return 0; 139 140 switch (par->cmap_type) { 141 case cmap_m64: 142 writeb(regno, par->cmap_adr); 143 writeb(red, par->cmap_data); 144 writeb(green, par->cmap_data); 145 writeb(blue, par->cmap_data); 146 break; 147 case cmap_M3A: 148 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 149 out_le32(par->cmap_adr + 0x58, 150 in_le32(par->cmap_adr + 0x58) & ~0x20); 151 case cmap_r128: 152 /* Set palette index & data */ 153 out_8(par->cmap_adr + 0xb0, regno); 154 out_le32(par->cmap_adr + 0xb4, 155 (red << 16 | green << 8 | blue)); 156 break; 157 case cmap_M3B: 158 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 159 out_le32(par->cmap_adr + 0x58, 160 in_le32(par->cmap_adr + 0x58) | 0x20); 161 /* Set palette index & data */ 162 out_8(par->cmap_adr + 0xb0, regno); 163 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 164 break; 165 case cmap_radeon: 166 /* Set palette index & data (could be smarter) */ 167 out_8(par->cmap_adr + 0xb0, regno); 168 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 169 break; 170 case cmap_gxt2000: 171 out_le32(((unsigned __iomem *) par->cmap_adr) + regno, 172 (red << 16 | green << 8 | blue)); 173 break; 174 case cmap_avivo: 175 /* Write to both LUTs for now */ 176 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 177 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 178 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 179 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 180 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 181 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 182 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 183 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 184 break; 185 } 186 187 return 0; 188} 189 190 /* 191 * Blank the display. 192 */ 193 194static int offb_blank(int blank, struct fb_info *info) 195{ 196 struct offb_par *par = (struct offb_par *) info->par; 197 int i, j; 198 199 if (!par->cmap_adr) 200 return 0; 201 202 if (!par->blanked) 203 if (!blank) 204 return 0; 205 206 par->blanked = blank; 207 208 if (blank) 209 for (i = 0; i < 256; i++) { 210 switch (par->cmap_type) { 211 case cmap_m64: 212 writeb(i, par->cmap_adr); 213 for (j = 0; j < 3; j++) 214 writeb(0, par->cmap_data); 215 break; 216 case cmap_M3A: 217 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 218 out_le32(par->cmap_adr + 0x58, 219 in_le32(par->cmap_adr + 0x58) & ~0x20); 220 case cmap_r128: 221 /* Set palette index & data */ 222 out_8(par->cmap_adr + 0xb0, i); 223 out_le32(par->cmap_adr + 0xb4, 0); 224 break; 225 case cmap_M3B: 226 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 227 out_le32(par->cmap_adr + 0x58, 228 in_le32(par->cmap_adr + 0x58) | 0x20); 229 /* Set palette index & data */ 230 out_8(par->cmap_adr + 0xb0, i); 231 out_le32(par->cmap_adr + 0xb4, 0); 232 break; 233 case cmap_radeon: 234 out_8(par->cmap_adr + 0xb0, i); 235 out_le32(par->cmap_adr + 0xb4, 0); 236 break; 237 case cmap_gxt2000: 238 out_le32(((unsigned __iomem *) par->cmap_adr) + i, 239 0); 240 break; 241 case cmap_avivo: 242 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 243 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 244 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 245 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 246 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 247 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 248 break; 249 } 250 } else 251 fb_set_cmap(&info->cmap, info); 252 return 0; 253} 254 255static int offb_set_par(struct fb_info *info) 256{ 257 struct offb_par *par = (struct offb_par *) info->par; 258 259 /* On avivo, initialize palette control */ 260 if (par->cmap_type == cmap_avivo) { 261 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL); 262 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE); 263 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN); 264 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED); 265 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE); 266 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN); 267 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED); 268 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL); 269 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE); 270 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN); 271 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED); 272 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE); 273 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN); 274 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED); 275 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 276 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 277 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 278 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 279 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 280 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 281 } 282 return 0; 283} 284 285static void offb_destroy(struct fb_info *info) 286{ 287 if (info->screen_base) 288 iounmap(info->screen_base); 289 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); 290 framebuffer_release(info); 291} 292 293static struct fb_ops offb_ops = { 294 .owner = THIS_MODULE, 295 .fb_destroy = offb_destroy, 296 .fb_setcolreg = offb_setcolreg, 297 .fb_set_par = offb_set_par, 298 .fb_blank = offb_blank, 299 .fb_fillrect = cfb_fillrect, 300 .fb_copyarea = cfb_copyarea, 301 .fb_imageblit = cfb_imageblit, 302}; 303 304static void __iomem *offb_map_reg(struct device_node *np, int index, 305 unsigned long offset, unsigned long size) 306{ 307 const u32 *addrp; 308 u64 asize, taddr; 309 unsigned int flags; 310 311 addrp = of_get_pci_address(np, index, &asize, &flags); 312 if (addrp == NULL) 313 addrp = of_get_address(np, index, &asize, &flags); 314 if (addrp == NULL) 315 return NULL; 316 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 317 return NULL; 318 if ((offset + size) > asize) 319 return NULL; 320 taddr = of_translate_address(np, addrp); 321 if (taddr == OF_BAD_ADDR) 322 return NULL; 323 return ioremap(taddr + offset, size); 324} 325 326static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp, 327 const char *name, unsigned long address) 328{ 329 struct offb_par *par = (struct offb_par *) info->par; 330 331 if (dp && !strncmp(name, "ATY,Rage128", 11)) { 332 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 333 if (par->cmap_adr) 334 par->cmap_type = cmap_r128; 335 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12) 336 || !strncmp(name, "ATY,RageM3p12A", 14))) { 337 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 338 if (par->cmap_adr) 339 par->cmap_type = cmap_M3A; 340 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) { 341 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 342 if (par->cmap_adr) 343 par->cmap_type = cmap_M3B; 344 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) { 345 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff); 346 if (par->cmap_adr) 347 par->cmap_type = cmap_radeon; 348 } else if (!strncmp(name, "ATY,", 4)) { 349 unsigned long base = address & 0xff000000UL; 350 par->cmap_adr = 351 ioremap(base + 0x7ff000, 0x1000) + 0xcc0; 352 par->cmap_data = par->cmap_adr + 1; 353 par->cmap_type = cmap_m64; 354 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") || 355 of_device_is_compatible(dp, "pci1014,21c"))) { 356 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000); 357 if (par->cmap_adr) 358 par->cmap_type = cmap_gxt2000; 359 } else if (dp && !strncmp(name, "vga,Display-", 12)) { 360 /* Look for AVIVO initialized by SLOF */ 361 struct device_node *pciparent = of_get_parent(dp); 362 const u32 *vid, *did; 363 vid = of_get_property(pciparent, "vendor-id", NULL); 364 did = of_get_property(pciparent, "device-id", NULL); 365 /* This will match most R5xx */ 366 if (vid && did && *vid == 0x1002 && 367 ((*did >= 0x7100 && *did < 0x7800) || 368 (*did >= 0x9400))) { 369 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000); 370 if (par->cmap_adr) 371 par->cmap_type = cmap_avivo; 372 } 373 of_node_put(pciparent); 374 } 375 info->fix.visual = (par->cmap_type != cmap_unknown) ? 376 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR; 377} 378 379static void __init offb_init_fb(const char *name, const char *full_name, 380 int width, int height, int depth, 381 int pitch, unsigned long address, 382 int foreign_endian, struct device_node *dp) 383{ 384 unsigned long res_size = pitch * height * (depth + 7) / 8; 385 struct offb_par *par = &default_par; 386 unsigned long res_start = address; 387 struct fb_fix_screeninfo *fix; 388 struct fb_var_screeninfo *var; 389 struct fb_info *info; 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 != 15 && 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 info = framebuffer_alloc(sizeof(u32) * 16, NULL); 405 406 if (info == 0) { 407 release_mem_region(res_start, res_size); 408 return; 409 } 410 411 fix = &info->fix; 412 var = &info->var; 413 info->par = par; 414 415 strcpy(fix->id, "OFfb "); 416 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb ")); 417 fix->id[sizeof(fix->id) - 1] = '\0'; 418 419 var->xres = var->xres_virtual = width; 420 var->yres = var->yres_virtual = height; 421 fix->line_length = pitch; 422 423 fix->smem_start = address; 424 fix->smem_len = pitch * height; 425 fix->type = FB_TYPE_PACKED_PIXELS; 426 fix->type_aux = 0; 427 428 par->cmap_type = cmap_unknown; 429 if (depth == 8) 430 offb_init_palette_hacks(info, dp, name, address); 431 else 432 fix->visual = FB_VISUAL_TRUECOLOR; 433 434 var->xoffset = var->yoffset = 0; 435 switch (depth) { 436 case 8: 437 var->bits_per_pixel = 8; 438 var->red.offset = 0; 439 var->red.length = 8; 440 var->green.offset = 0; 441 var->green.length = 8; 442 var->blue.offset = 0; 443 var->blue.length = 8; 444 var->transp.offset = 0; 445 var->transp.length = 0; 446 break; 447 case 15: /* RGB 555 */ 448 var->bits_per_pixel = 16; 449 var->red.offset = 10; 450 var->red.length = 5; 451 var->green.offset = 5; 452 var->green.length = 5; 453 var->blue.offset = 0; 454 var->blue.length = 5; 455 var->transp.offset = 0; 456 var->transp.length = 0; 457 break; 458 case 16: /* RGB 565 */ 459 var->bits_per_pixel = 16; 460 var->red.offset = 11; 461 var->red.length = 5; 462 var->green.offset = 5; 463 var->green.length = 6; 464 var->blue.offset = 0; 465 var->blue.length = 5; 466 var->transp.offset = 0; 467 var->transp.length = 0; 468 break; 469 case 32: /* RGB 888 */ 470 var->bits_per_pixel = 32; 471 var->red.offset = 16; 472 var->red.length = 8; 473 var->green.offset = 8; 474 var->green.length = 8; 475 var->blue.offset = 0; 476 var->blue.length = 8; 477 var->transp.offset = 24; 478 var->transp.length = 8; 479 break; 480 } 481 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 482 var->transp.msb_right = 0; 483 var->grayscale = 0; 484 var->nonstd = 0; 485 var->activate = 0; 486 var->height = var->width = -1; 487 var->pixclock = 10000; 488 var->left_margin = var->right_margin = 16; 489 var->upper_margin = var->lower_margin = 16; 490 var->hsync_len = var->vsync_len = 8; 491 var->sync = 0; 492 var->vmode = FB_VMODE_NONINTERLACED; 493 494 /* set offb aperture size for generic probing */ 495 info->apertures = alloc_apertures(1); 496 if (!info->apertures) 497 goto out_aper; 498 info->apertures->ranges[0].base = address; 499 info->apertures->ranges[0].size = fix->smem_len; 500 501 info->fbops = &offb_ops; 502 info->screen_base = ioremap(address, fix->smem_len); 503 info->pseudo_palette = (void *) (info + 1); 504 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian; 505 506 fb_alloc_cmap(&info->cmap, 256, 0); 507 508 if (register_framebuffer(info) < 0) 509 goto out_err; 510 511 printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n", 512 info->node, full_name); 513 return; 514 515out_err: 516 iounmap(info->screen_base); 517out_aper: 518 iounmap(par->cmap_adr); 519 par->cmap_adr = NULL; 520 framebuffer_release(info); 521 release_mem_region(res_start, res_size); 522} 523 524 525static void __init offb_init_nodriver(struct device_node *dp, int no_real_node) 526{ 527 unsigned int len; 528 int i, width = 640, height = 480, depth = 8, pitch = 640; 529 unsigned int flags, rsize, addr_prop = 0; 530 unsigned long max_size = 0; 531 u64 rstart, address = OF_BAD_ADDR; 532 const u32 *pp, *addrp, *up; 533 u64 asize; 534 int foreign_endian = 0; 535 536#ifdef __BIG_ENDIAN 537 if (of_get_property(dp, "little-endian", NULL)) 538 foreign_endian = FBINFO_FOREIGN_ENDIAN; 539#else 540 if (of_get_property(dp, "big-endian", NULL)) 541 foreign_endian = FBINFO_FOREIGN_ENDIAN; 542#endif 543 544 pp = of_get_property(dp, "linux,bootx-depth", &len); 545 if (pp == NULL) 546 pp = of_get_property(dp, "depth", &len); 547 if (pp && len == sizeof(u32)) 548 depth = *pp; 549 550 pp = of_get_property(dp, "linux,bootx-width", &len); 551 if (pp == NULL) 552 pp = of_get_property(dp, "width", &len); 553 if (pp && len == sizeof(u32)) 554 width = *pp; 555 556 pp = of_get_property(dp, "linux,bootx-height", &len); 557 if (pp == NULL) 558 pp = of_get_property(dp, "height", &len); 559 if (pp && len == sizeof(u32)) 560 height = *pp; 561 562 pp = of_get_property(dp, "linux,bootx-linebytes", &len); 563 if (pp == NULL) 564 pp = of_get_property(dp, "linebytes", &len); 565 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu)) 566 pitch = *pp; 567 else 568 pitch = width * ((depth + 7) / 8); 569 570 rsize = (unsigned long)pitch * (unsigned long)height; 571 572 /* Ok, now we try to figure out the address of the framebuffer. 573 * 574 * Unfortunately, Open Firmware doesn't provide a standard way to do 575 * so. All we can do is a dodgy heuristic that happens to work in 576 * practice. On most machines, the "address" property contains what 577 * we need, though not on Matrox cards found in IBM machines. What I've 578 * found that appears to give good results is to go through the PCI 579 * ranges and pick one that is both big enough and if possible encloses 580 * the "address" property. If none match, we pick the biggest 581 */ 582 up = of_get_property(dp, "linux,bootx-addr", &len); 583 if (up == NULL) 584 up = of_get_property(dp, "address", &len); 585 if (up && len == sizeof(u32)) 586 addr_prop = *up; 587 588 /* Hack for when BootX is passing us */ 589 if (no_real_node) 590 goto skip_addr; 591 592 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags)) 593 != NULL; i++) { 594 int match_addrp = 0; 595 596 if (!(flags & IORESOURCE_MEM)) 597 continue; 598 if (asize < rsize) 599 continue; 600 rstart = of_translate_address(dp, addrp); 601 if (rstart == OF_BAD_ADDR) 602 continue; 603 if (addr_prop && (rstart <= addr_prop) && 604 ((rstart + asize) >= (addr_prop + rsize))) 605 match_addrp = 1; 606 if (match_addrp) { 607 address = addr_prop; 608 break; 609 } 610 if (rsize > max_size) { 611 max_size = rsize; 612 address = OF_BAD_ADDR; 613 } 614 615 if (address == OF_BAD_ADDR) 616 address = rstart; 617 } 618 skip_addr: 619 if (address == OF_BAD_ADDR && addr_prop) 620 address = (u64)addr_prop; 621 if (address != OF_BAD_ADDR) { 622 /* kludge for valkyrie */ 623 if (strcmp(dp->name, "valkyrie") == 0) 624 address += 0x1000; 625 offb_init_fb(no_real_node ? "bootx" : dp->name, 626 no_real_node ? "display" : dp->full_name, 627 width, height, depth, pitch, address, 628 foreign_endian, no_real_node ? NULL : dp); 629 } 630} 631 632static int __init offb_init(void) 633{ 634 struct device_node *dp = NULL, *boot_disp = NULL; 635 636 if (fb_get_options("offb", NULL)) 637 return -ENODEV; 638 639 /* Check if we have a MacOS display without a node spec */ 640 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) { 641 /* The old code tried to work out which node was the MacOS 642 * display based on the address. I'm dropping that since the 643 * lack of a node spec only happens with old BootX versions 644 * (users can update) and with this code, they'll still get 645 * a display (just not the palette hacks). 646 */ 647 offb_init_nodriver(of_chosen, 1); 648 } 649 650 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) { 651 if (of_get_property(dp, "linux,opened", NULL) && 652 of_get_property(dp, "linux,boot-display", NULL)) { 653 boot_disp = dp; 654 offb_init_nodriver(dp, 0); 655 } 656 } 657 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) { 658 if (of_get_property(dp, "linux,opened", NULL) && 659 dp != boot_disp) 660 offb_init_nodriver(dp, 0); 661 } 662 663 return 0; 664} 665 666 667module_init(offb_init); 668MODULE_LICENSE("GPL"); 669