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_PPC32 32 #include <asm/bootx.h> 33 #endif 34 35 #include "macmodes.h" 36 37 /* Supported palette hacks */ 38 enum { 39 cmap_unknown, 40 cmap_simple, /* ATI Mach64 */ 41 cmap_r128, /* ATI Rage128 */ 42 cmap_M3A, /* ATI Rage Mobility M3 Head A */ 43 cmap_M3B, /* ATI Rage Mobility M3 Head B */ 44 cmap_radeon, /* ATI Radeon */ 45 cmap_gxt2000, /* IBM GXT2000 */ 46 cmap_avivo, /* ATI R5xx */ 47 cmap_qemu, /* qemu vga */ 48 }; 49 50 struct offb_par { 51 volatile void __iomem *cmap_adr; 52 volatile void __iomem *cmap_data; 53 int cmap_type; 54 int blanked; 55 }; 56 57 struct offb_par default_par; 58 59 #ifdef CONFIG_PPC32 60 extern boot_infos_t *boot_infos; 61 #endif 62 63 /* Definitions used by the Avivo palette hack */ 64 #define AVIVO_DC_LUT_RW_SELECT 0x6480 65 #define AVIVO_DC_LUT_RW_MODE 0x6484 66 #define AVIVO_DC_LUT_RW_INDEX 0x6488 67 #define AVIVO_DC_LUT_SEQ_COLOR 0x648c 68 #define AVIVO_DC_LUT_PWL_DATA 0x6490 69 #define AVIVO_DC_LUT_30_COLOR 0x6494 70 #define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498 71 #define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c 72 #define AVIVO_DC_LUT_AUTOFILL 0x64a0 73 74 #define AVIVO_DC_LUTA_CONTROL 0x64c0 75 #define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4 76 #define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8 77 #define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc 78 #define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0 79 #define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4 80 #define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8 81 82 #define AVIVO_DC_LUTB_CONTROL 0x6cc0 83 #define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4 84 #define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8 85 #define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc 86 #define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0 87 #define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4 88 #define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8 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 (info->fix.visual == FB_VISUAL_TRUECOLOR) { 102 u32 *pal = info->pseudo_palette; 103 u32 cr = red >> (16 - info->var.red.length); 104 u32 cg = green >> (16 - info->var.green.length); 105 u32 cb = blue >> (16 - info->var.blue.length); 106 u32 value; 107 108 if (regno >= 16) 109 return -EINVAL; 110 111 value = (cr << info->var.red.offset) | 112 (cg << info->var.green.offset) | 113 (cb << info->var.blue.offset); 114 if (info->var.transp.length > 0) { 115 u32 mask = (1 << info->var.transp.length) - 1; 116 mask <<= info->var.transp.offset; 117 value |= mask; 118 } 119 pal[regno] = value; 120 return 0; 121 } 122 123 if (regno > 255) 124 return -EINVAL; 125 126 red >>= 8; 127 green >>= 8; 128 blue >>= 8; 129 130 if (!par->cmap_adr) 131 return 0; 132 133 switch (par->cmap_type) { 134 case cmap_simple: 135 writeb(regno, par->cmap_adr); 136 writeb(red, par->cmap_data); 137 writeb(green, par->cmap_data); 138 writeb(blue, par->cmap_data); 139 break; 140 case cmap_M3A: 141 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 142 out_le32(par->cmap_adr + 0x58, 143 in_le32(par->cmap_adr + 0x58) & ~0x20); 144 case cmap_r128: 145 /* Set palette index & data */ 146 out_8(par->cmap_adr + 0xb0, regno); 147 out_le32(par->cmap_adr + 0xb4, 148 (red << 16 | green << 8 | blue)); 149 break; 150 case cmap_M3B: 151 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 152 out_le32(par->cmap_adr + 0x58, 153 in_le32(par->cmap_adr + 0x58) | 0x20); 154 /* Set palette index & data */ 155 out_8(par->cmap_adr + 0xb0, regno); 156 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 157 break; 158 case cmap_radeon: 159 /* Set palette index & data (could be smarter) */ 160 out_8(par->cmap_adr + 0xb0, regno); 161 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 162 break; 163 case cmap_gxt2000: 164 out_le32(((unsigned __iomem *) par->cmap_adr) + regno, 165 (red << 16 | green << 8 | blue)); 166 break; 167 case cmap_avivo: 168 /* Write to both LUTs for now */ 169 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 170 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 171 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 172 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 173 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 174 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 175 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 176 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 177 break; 178 } 179 180 return 0; 181 } 182 183 /* 184 * Blank the display. 185 */ 186 187 static int offb_blank(int blank, struct fb_info *info) 188 { 189 struct offb_par *par = (struct offb_par *) info->par; 190 int i, j; 191 192 if (!par->cmap_adr) 193 return 0; 194 195 if (!par->blanked) 196 if (!blank) 197 return 0; 198 199 par->blanked = blank; 200 201 if (blank) 202 for (i = 0; i < 256; i++) { 203 switch (par->cmap_type) { 204 case cmap_simple: 205 writeb(i, par->cmap_adr); 206 for (j = 0; j < 3; j++) 207 writeb(0, par->cmap_data); 208 break; 209 case cmap_M3A: 210 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 211 out_le32(par->cmap_adr + 0x58, 212 in_le32(par->cmap_adr + 0x58) & ~0x20); 213 case cmap_r128: 214 /* Set palette index & data */ 215 out_8(par->cmap_adr + 0xb0, i); 216 out_le32(par->cmap_adr + 0xb4, 0); 217 break; 218 case cmap_M3B: 219 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 220 out_le32(par->cmap_adr + 0x58, 221 in_le32(par->cmap_adr + 0x58) | 0x20); 222 /* Set palette index & data */ 223 out_8(par->cmap_adr + 0xb0, i); 224 out_le32(par->cmap_adr + 0xb4, 0); 225 break; 226 case cmap_radeon: 227 out_8(par->cmap_adr + 0xb0, i); 228 out_le32(par->cmap_adr + 0xb4, 0); 229 break; 230 case cmap_gxt2000: 231 out_le32(((unsigned __iomem *) par->cmap_adr) + i, 232 0); 233 break; 234 case cmap_avivo: 235 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 236 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 237 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 238 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 239 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 240 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 241 break; 242 } 243 } else 244 fb_set_cmap(&info->cmap, info); 245 return 0; 246 } 247 248 static int offb_set_par(struct fb_info *info) 249 { 250 struct offb_par *par = (struct offb_par *) info->par; 251 252 /* On avivo, initialize palette control */ 253 if (par->cmap_type == cmap_avivo) { 254 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL); 255 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE); 256 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN); 257 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED); 258 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE); 259 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN); 260 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED); 261 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL); 262 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE); 263 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN); 264 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED); 265 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE); 266 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN); 267 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED); 268 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 269 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 270 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 271 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 272 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 273 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 274 } 275 return 0; 276 } 277 278 static void offb_destroy(struct fb_info *info) 279 { 280 if (info->screen_base) 281 iounmap(info->screen_base); 282 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); 283 framebuffer_release(info); 284 } 285 286 static struct fb_ops offb_ops = { 287 .owner = THIS_MODULE, 288 .fb_destroy = offb_destroy, 289 .fb_setcolreg = offb_setcolreg, 290 .fb_set_par = offb_set_par, 291 .fb_blank = offb_blank, 292 .fb_fillrect = cfb_fillrect, 293 .fb_copyarea = cfb_copyarea, 294 .fb_imageblit = cfb_imageblit, 295 }; 296 297 static void __iomem *offb_map_reg(struct device_node *np, int index, 298 unsigned long offset, unsigned long size) 299 { 300 const __be32 *addrp; 301 u64 asize, taddr; 302 unsigned int flags; 303 304 addrp = of_get_pci_address(np, index, &asize, &flags); 305 if (addrp == NULL) 306 addrp = of_get_address(np, index, &asize, &flags); 307 if (addrp == NULL) 308 return NULL; 309 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 310 return NULL; 311 if ((offset + size) > asize) 312 return NULL; 313 taddr = of_translate_address(np, addrp); 314 if (taddr == OF_BAD_ADDR) 315 return NULL; 316 return ioremap(taddr + offset, size); 317 } 318 319 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp, 320 const char *name, unsigned long address) 321 { 322 struct offb_par *par = (struct offb_par *) info->par; 323 324 if (dp && !strncmp(name, "ATY,Rage128", 11)) { 325 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 326 if (par->cmap_adr) 327 par->cmap_type = cmap_r128; 328 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12) 329 || !strncmp(name, "ATY,RageM3p12A", 14))) { 330 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 331 if (par->cmap_adr) 332 par->cmap_type = cmap_M3A; 333 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) { 334 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 335 if (par->cmap_adr) 336 par->cmap_type = cmap_M3B; 337 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) { 338 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff); 339 if (par->cmap_adr) 340 par->cmap_type = cmap_radeon; 341 } else if (!strncmp(name, "ATY,", 4)) { 342 unsigned long base = address & 0xff000000UL; 343 par->cmap_adr = 344 ioremap(base + 0x7ff000, 0x1000) + 0xcc0; 345 par->cmap_data = par->cmap_adr + 1; 346 par->cmap_type = cmap_simple; 347 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") || 348 of_device_is_compatible(dp, "pci1014,21c"))) { 349 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000); 350 if (par->cmap_adr) 351 par->cmap_type = cmap_gxt2000; 352 } else if (dp && !strncmp(name, "vga,Display-", 12)) { 353 /* Look for AVIVO initialized by SLOF */ 354 struct device_node *pciparent = of_get_parent(dp); 355 const u32 *vid, *did; 356 vid = of_get_property(pciparent, "vendor-id", NULL); 357 did = of_get_property(pciparent, "device-id", NULL); 358 /* This will match most R5xx */ 359 if (vid && did && *vid == 0x1002 && 360 ((*did >= 0x7100 && *did < 0x7800) || 361 (*did >= 0x9400))) { 362 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000); 363 if (par->cmap_adr) 364 par->cmap_type = cmap_avivo; 365 } 366 of_node_put(pciparent); 367 } else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) { 368 #ifdef __BIG_ENDIAN 369 const __be32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 }; 370 #else 371 const __be32 io_of_addr[3] = { 0x00000001, 0x0, 0x0 }; 372 #endif 373 u64 io_addr = of_translate_address(dp, io_of_addr); 374 if (io_addr != OF_BAD_ADDR) { 375 par->cmap_adr = ioremap(io_addr + 0x3c8, 2); 376 if (par->cmap_adr) { 377 par->cmap_type = cmap_simple; 378 par->cmap_data = par->cmap_adr + 1; 379 } 380 } 381 } 382 info->fix.visual = (par->cmap_type != cmap_unknown) ? 383 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR; 384 } 385 386 static void __init offb_init_fb(const char *name, const char *full_name, 387 int width, int height, int depth, 388 int pitch, unsigned long address, 389 int foreign_endian, struct device_node *dp) 390 { 391 unsigned long res_size = pitch * height; 392 struct offb_par *par = &default_par; 393 unsigned long res_start = address; 394 struct fb_fix_screeninfo *fix; 395 struct fb_var_screeninfo *var; 396 struct fb_info *info; 397 398 if (!request_mem_region(res_start, res_size, "offb")) 399 return; 400 401 printk(KERN_INFO 402 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n", 403 width, height, name, address, depth, pitch); 404 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) { 405 printk(KERN_ERR "%s: can't use depth = %d\n", full_name, 406 depth); 407 release_mem_region(res_start, res_size); 408 return; 409 } 410 411 info = framebuffer_alloc(sizeof(u32) * 16, NULL); 412 413 if (info == 0) { 414 release_mem_region(res_start, res_size); 415 return; 416 } 417 418 fix = &info->fix; 419 var = &info->var; 420 info->par = par; 421 422 strcpy(fix->id, "OFfb "); 423 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb ")); 424 fix->id[sizeof(fix->id) - 1] = '\0'; 425 426 var->xres = var->xres_virtual = width; 427 var->yres = var->yres_virtual = height; 428 fix->line_length = pitch; 429 430 fix->smem_start = address; 431 fix->smem_len = pitch * height; 432 fix->type = FB_TYPE_PACKED_PIXELS; 433 fix->type_aux = 0; 434 435 par->cmap_type = cmap_unknown; 436 if (depth == 8) 437 offb_init_palette_hacks(info, dp, name, address); 438 else 439 fix->visual = FB_VISUAL_TRUECOLOR; 440 441 var->xoffset = var->yoffset = 0; 442 switch (depth) { 443 case 8: 444 var->bits_per_pixel = 8; 445 var->red.offset = 0; 446 var->red.length = 8; 447 var->green.offset = 0; 448 var->green.length = 8; 449 var->blue.offset = 0; 450 var->blue.length = 8; 451 var->transp.offset = 0; 452 var->transp.length = 0; 453 break; 454 case 15: /* RGB 555 */ 455 var->bits_per_pixel = 16; 456 var->red.offset = 10; 457 var->red.length = 5; 458 var->green.offset = 5; 459 var->green.length = 5; 460 var->blue.offset = 0; 461 var->blue.length = 5; 462 var->transp.offset = 0; 463 var->transp.length = 0; 464 break; 465 case 16: /* RGB 565 */ 466 var->bits_per_pixel = 16; 467 var->red.offset = 11; 468 var->red.length = 5; 469 var->green.offset = 5; 470 var->green.length = 6; 471 var->blue.offset = 0; 472 var->blue.length = 5; 473 var->transp.offset = 0; 474 var->transp.length = 0; 475 break; 476 case 32: /* RGB 888 */ 477 var->bits_per_pixel = 32; 478 var->red.offset = 16; 479 var->red.length = 8; 480 var->green.offset = 8; 481 var->green.length = 8; 482 var->blue.offset = 0; 483 var->blue.length = 8; 484 var->transp.offset = 24; 485 var->transp.length = 8; 486 break; 487 } 488 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 489 var->transp.msb_right = 0; 490 var->grayscale = 0; 491 var->nonstd = 0; 492 var->activate = 0; 493 var->height = var->width = -1; 494 var->pixclock = 10000; 495 var->left_margin = var->right_margin = 16; 496 var->upper_margin = var->lower_margin = 16; 497 var->hsync_len = var->vsync_len = 8; 498 var->sync = 0; 499 var->vmode = FB_VMODE_NONINTERLACED; 500 501 /* set offb aperture size for generic probing */ 502 info->apertures = alloc_apertures(1); 503 if (!info->apertures) 504 goto out_aper; 505 info->apertures->ranges[0].base = address; 506 info->apertures->ranges[0].size = fix->smem_len; 507 508 info->fbops = &offb_ops; 509 info->screen_base = ioremap(address, fix->smem_len); 510 info->pseudo_palette = (void *) (info + 1); 511 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian; 512 513 fb_alloc_cmap(&info->cmap, 256, 0); 514 515 if (register_framebuffer(info) < 0) 516 goto out_err; 517 518 fb_info(info, "Open Firmware frame buffer device on %s\n", full_name); 519 return; 520 521 out_err: 522 iounmap(info->screen_base); 523 out_aper: 524 iounmap(par->cmap_adr); 525 par->cmap_adr = NULL; 526 framebuffer_release(info); 527 release_mem_region(res_start, res_size); 528 } 529 530 531 static void __init offb_init_nodriver(struct device_node *dp, int no_real_node) 532 { 533 unsigned int len; 534 int i, width = 640, height = 480, depth = 8, pitch = 640; 535 unsigned int flags, rsize, addr_prop = 0; 536 unsigned long max_size = 0; 537 u64 rstart, address = OF_BAD_ADDR; 538 const __be32 *pp, *addrp, *up; 539 u64 asize; 540 int foreign_endian = 0; 541 542 #ifdef __BIG_ENDIAN 543 if (of_get_property(dp, "little-endian", NULL)) 544 foreign_endian = FBINFO_FOREIGN_ENDIAN; 545 #else 546 if (of_get_property(dp, "big-endian", NULL)) 547 foreign_endian = FBINFO_FOREIGN_ENDIAN; 548 #endif 549 550 pp = of_get_property(dp, "linux,bootx-depth", &len); 551 if (pp == NULL) 552 pp = of_get_property(dp, "depth", &len); 553 if (pp && len == sizeof(u32)) 554 depth = be32_to_cpup(pp); 555 556 pp = of_get_property(dp, "linux,bootx-width", &len); 557 if (pp == NULL) 558 pp = of_get_property(dp, "width", &len); 559 if (pp && len == sizeof(u32)) 560 width = be32_to_cpup(pp); 561 562 pp = of_get_property(dp, "linux,bootx-height", &len); 563 if (pp == NULL) 564 pp = of_get_property(dp, "height", &len); 565 if (pp && len == sizeof(u32)) 566 height = be32_to_cpup(pp); 567 568 pp = of_get_property(dp, "linux,bootx-linebytes", &len); 569 if (pp == NULL) 570 pp = of_get_property(dp, "linebytes", &len); 571 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu)) 572 pitch = be32_to_cpup(pp); 573 else 574 pitch = width * ((depth + 7) / 8); 575 576 rsize = (unsigned long)pitch * (unsigned long)height; 577 578 /* Ok, now we try to figure out the address of the framebuffer. 579 * 580 * Unfortunately, Open Firmware doesn't provide a standard way to do 581 * so. All we can do is a dodgy heuristic that happens to work in 582 * practice. On most machines, the "address" property contains what 583 * we need, though not on Matrox cards found in IBM machines. What I've 584 * found that appears to give good results is to go through the PCI 585 * ranges and pick one that is both big enough and if possible encloses 586 * the "address" property. If none match, we pick the biggest 587 */ 588 up = of_get_property(dp, "linux,bootx-addr", &len); 589 if (up == NULL) 590 up = of_get_property(dp, "address", &len); 591 if (up && len == sizeof(u32)) 592 addr_prop = *up; 593 594 /* Hack for when BootX is passing us */ 595 if (no_real_node) 596 goto skip_addr; 597 598 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags)) 599 != NULL; i++) { 600 int match_addrp = 0; 601 602 if (!(flags & IORESOURCE_MEM)) 603 continue; 604 if (asize < rsize) 605 continue; 606 rstart = of_translate_address(dp, addrp); 607 if (rstart == OF_BAD_ADDR) 608 continue; 609 if (addr_prop && (rstart <= addr_prop) && 610 ((rstart + asize) >= (addr_prop + rsize))) 611 match_addrp = 1; 612 if (match_addrp) { 613 address = addr_prop; 614 break; 615 } 616 if (rsize > max_size) { 617 max_size = rsize; 618 address = OF_BAD_ADDR; 619 } 620 621 if (address == OF_BAD_ADDR) 622 address = rstart; 623 } 624 skip_addr: 625 if (address == OF_BAD_ADDR && addr_prop) 626 address = (u64)addr_prop; 627 if (address != OF_BAD_ADDR) { 628 /* kludge for valkyrie */ 629 if (strcmp(dp->name, "valkyrie") == 0) 630 address += 0x1000; 631 offb_init_fb(no_real_node ? "bootx" : dp->name, 632 no_real_node ? "display" : dp->full_name, 633 width, height, depth, pitch, address, 634 foreign_endian, no_real_node ? NULL : dp); 635 } 636 } 637 638 static int __init offb_init(void) 639 { 640 struct device_node *dp = NULL, *boot_disp = NULL; 641 642 if (fb_get_options("offb", NULL)) 643 return -ENODEV; 644 645 /* Check if we have a MacOS display without a node spec */ 646 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) { 647 /* The old code tried to work out which node was the MacOS 648 * display based on the address. I'm dropping that since the 649 * lack of a node spec only happens with old BootX versions 650 * (users can update) and with this code, they'll still get 651 * a display (just not the palette hacks). 652 */ 653 offb_init_nodriver(of_chosen, 1); 654 } 655 656 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) { 657 if (of_get_property(dp, "linux,opened", NULL) && 658 of_get_property(dp, "linux,boot-display", NULL)) { 659 boot_disp = dp; 660 offb_init_nodriver(dp, 0); 661 } 662 } 663 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) { 664 if (of_get_property(dp, "linux,opened", NULL) && 665 dp != boot_disp) 666 offb_init_nodriver(dp, 0); 667 } 668 669 return 0; 670 } 671 672 673 module_init(offb_init); 674 MODULE_LICENSE("GPL"); 675