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 fb_dealloc_cmap(&info->cmap); 284 framebuffer_release(info); 285 } 286 287 static struct fb_ops offb_ops = { 288 .owner = THIS_MODULE, 289 .fb_destroy = offb_destroy, 290 .fb_setcolreg = offb_setcolreg, 291 .fb_set_par = offb_set_par, 292 .fb_blank = offb_blank, 293 .fb_fillrect = cfb_fillrect, 294 .fb_copyarea = cfb_copyarea, 295 .fb_imageblit = cfb_imageblit, 296 }; 297 298 static void __iomem *offb_map_reg(struct device_node *np, int index, 299 unsigned long offset, unsigned long size) 300 { 301 const __be32 *addrp; 302 u64 asize, taddr; 303 unsigned int flags; 304 305 addrp = of_get_pci_address(np, index, &asize, &flags); 306 if (addrp == NULL) 307 addrp = of_get_address(np, index, &asize, &flags); 308 if (addrp == NULL) 309 return NULL; 310 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 311 return NULL; 312 if ((offset + size) > asize) 313 return NULL; 314 taddr = of_translate_address(np, addrp); 315 if (taddr == OF_BAD_ADDR) 316 return NULL; 317 return ioremap(taddr + offset, size); 318 } 319 320 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp, 321 unsigned long address) 322 { 323 struct offb_par *par = (struct offb_par *) info->par; 324 325 if (of_node_name_prefix(dp, "ATY,Rage128")) { 326 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 327 if (par->cmap_adr) 328 par->cmap_type = cmap_r128; 329 } else if (of_node_name_prefix(dp, "ATY,RageM3pA") || 330 of_node_name_prefix(dp, "ATY,RageM3p12A")) { 331 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 332 if (par->cmap_adr) 333 par->cmap_type = cmap_M3A; 334 } else if (of_node_name_prefix(dp, "ATY,RageM3pB")) { 335 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 336 if (par->cmap_adr) 337 par->cmap_type = cmap_M3B; 338 } else if (of_node_name_prefix(dp, "ATY,Rage6")) { 339 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff); 340 if (par->cmap_adr) 341 par->cmap_type = cmap_radeon; 342 } else if (of_node_name_prefix(dp, "ATY,")) { 343 unsigned long base = address & 0xff000000UL; 344 par->cmap_adr = 345 ioremap(base + 0x7ff000, 0x1000) + 0xcc0; 346 par->cmap_data = par->cmap_adr + 1; 347 par->cmap_type = cmap_simple; 348 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") || 349 of_device_is_compatible(dp, "pci1014,21c"))) { 350 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000); 351 if (par->cmap_adr) 352 par->cmap_type = cmap_gxt2000; 353 } else if (of_node_name_prefix(dp, "vga,Display-")) { 354 /* Look for AVIVO initialized by SLOF */ 355 struct device_node *pciparent = of_get_parent(dp); 356 const u32 *vid, *did; 357 vid = of_get_property(pciparent, "vendor-id", NULL); 358 did = of_get_property(pciparent, "device-id", NULL); 359 /* This will match most R5xx */ 360 if (vid && did && *vid == 0x1002 && 361 ((*did >= 0x7100 && *did < 0x7800) || 362 (*did >= 0x9400))) { 363 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000); 364 if (par->cmap_adr) 365 par->cmap_type = cmap_avivo; 366 } 367 of_node_put(pciparent); 368 } else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) { 369 #ifdef __BIG_ENDIAN 370 const __be32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 }; 371 #else 372 const __be32 io_of_addr[3] = { 0x00000001, 0x0, 0x0 }; 373 #endif 374 u64 io_addr = of_translate_address(dp, io_of_addr); 375 if (io_addr != OF_BAD_ADDR) { 376 par->cmap_adr = ioremap(io_addr + 0x3c8, 2); 377 if (par->cmap_adr) { 378 par->cmap_type = cmap_simple; 379 par->cmap_data = par->cmap_adr + 1; 380 } 381 } 382 } 383 info->fix.visual = (par->cmap_type != cmap_unknown) ? 384 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR; 385 } 386 387 static void __init offb_init_fb(const char *name, 388 int width, int height, int depth, 389 int pitch, unsigned long address, 390 int foreign_endian, struct device_node *dp) 391 { 392 unsigned long res_size = pitch * height; 393 struct offb_par *par = &default_par; 394 unsigned long res_start = address; 395 struct fb_fix_screeninfo *fix; 396 struct fb_var_screeninfo *var; 397 struct fb_info *info; 398 399 if (!request_mem_region(res_start, res_size, "offb")) 400 return; 401 402 printk(KERN_INFO 403 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n", 404 width, height, name, address, depth, pitch); 405 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) { 406 printk(KERN_ERR "%pOF: can't use depth = %d\n", dp, 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 if (name) { 423 strcpy(fix->id, "OFfb "); 424 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb ")); 425 fix->id[sizeof(fix->id) - 1] = '\0'; 426 } else 427 snprintf(fix->id, sizeof(fix->id), "OFfb %pOFn", dp); 428 429 430 var->xres = var->xres_virtual = width; 431 var->yres = var->yres_virtual = height; 432 fix->line_length = pitch; 433 434 fix->smem_start = address; 435 fix->smem_len = pitch * height; 436 fix->type = FB_TYPE_PACKED_PIXELS; 437 fix->type_aux = 0; 438 439 par->cmap_type = cmap_unknown; 440 if (depth == 8) 441 offb_init_palette_hacks(info, dp, address); 442 else 443 fix->visual = FB_VISUAL_TRUECOLOR; 444 445 var->xoffset = var->yoffset = 0; 446 switch (depth) { 447 case 8: 448 var->bits_per_pixel = 8; 449 var->red.offset = 0; 450 var->red.length = 8; 451 var->green.offset = 0; 452 var->green.length = 8; 453 var->blue.offset = 0; 454 var->blue.length = 8; 455 var->transp.offset = 0; 456 var->transp.length = 0; 457 break; 458 case 15: /* RGB 555 */ 459 var->bits_per_pixel = 16; 460 var->red.offset = 10; 461 var->red.length = 5; 462 var->green.offset = 5; 463 var->green.length = 5; 464 var->blue.offset = 0; 465 var->blue.length = 5; 466 var->transp.offset = 0; 467 var->transp.length = 0; 468 break; 469 case 16: /* RGB 565 */ 470 var->bits_per_pixel = 16; 471 var->red.offset = 11; 472 var->red.length = 5; 473 var->green.offset = 5; 474 var->green.length = 6; 475 var->blue.offset = 0; 476 var->blue.length = 5; 477 var->transp.offset = 0; 478 var->transp.length = 0; 479 break; 480 case 32: /* RGB 888 */ 481 var->bits_per_pixel = 32; 482 var->red.offset = 16; 483 var->red.length = 8; 484 var->green.offset = 8; 485 var->green.length = 8; 486 var->blue.offset = 0; 487 var->blue.length = 8; 488 var->transp.offset = 24; 489 var->transp.length = 8; 490 break; 491 } 492 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 493 var->transp.msb_right = 0; 494 var->grayscale = 0; 495 var->nonstd = 0; 496 var->activate = 0; 497 var->height = var->width = -1; 498 var->pixclock = 10000; 499 var->left_margin = var->right_margin = 16; 500 var->upper_margin = var->lower_margin = 16; 501 var->hsync_len = var->vsync_len = 8; 502 var->sync = 0; 503 var->vmode = FB_VMODE_NONINTERLACED; 504 505 /* set offb aperture size for generic probing */ 506 info->apertures = alloc_apertures(1); 507 if (!info->apertures) 508 goto out_aper; 509 info->apertures->ranges[0].base = address; 510 info->apertures->ranges[0].size = fix->smem_len; 511 512 info->fbops = &offb_ops; 513 info->screen_base = ioremap(address, fix->smem_len); 514 info->pseudo_palette = (void *) (info + 1); 515 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian; 516 517 fb_alloc_cmap(&info->cmap, 256, 0); 518 519 if (register_framebuffer(info) < 0) 520 goto out_err; 521 522 fb_info(info, "Open Firmware frame buffer device on %pOF\n", dp); 523 return; 524 525 out_err: 526 fb_dealloc_cmap(&info->cmap); 527 iounmap(info->screen_base); 528 out_aper: 529 iounmap(par->cmap_adr); 530 par->cmap_adr = NULL; 531 framebuffer_release(info); 532 release_mem_region(res_start, res_size); 533 } 534 535 536 static void __init offb_init_nodriver(struct device_node *dp, int no_real_node) 537 { 538 unsigned int len; 539 int i, width = 640, height = 480, depth = 8, pitch = 640; 540 unsigned int flags, rsize, addr_prop = 0; 541 unsigned long max_size = 0; 542 u64 rstart, address = OF_BAD_ADDR; 543 const __be32 *pp, *addrp, *up; 544 u64 asize; 545 int foreign_endian = 0; 546 547 #ifdef __BIG_ENDIAN 548 if (of_get_property(dp, "little-endian", NULL)) 549 foreign_endian = FBINFO_FOREIGN_ENDIAN; 550 #else 551 if (of_get_property(dp, "big-endian", NULL)) 552 foreign_endian = FBINFO_FOREIGN_ENDIAN; 553 #endif 554 555 pp = of_get_property(dp, "linux,bootx-depth", &len); 556 if (pp == NULL) 557 pp = of_get_property(dp, "depth", &len); 558 if (pp && len == sizeof(u32)) 559 depth = be32_to_cpup(pp); 560 561 pp = of_get_property(dp, "linux,bootx-width", &len); 562 if (pp == NULL) 563 pp = of_get_property(dp, "width", &len); 564 if (pp && len == sizeof(u32)) 565 width = be32_to_cpup(pp); 566 567 pp = of_get_property(dp, "linux,bootx-height", &len); 568 if (pp == NULL) 569 pp = of_get_property(dp, "height", &len); 570 if (pp && len == sizeof(u32)) 571 height = be32_to_cpup(pp); 572 573 pp = of_get_property(dp, "linux,bootx-linebytes", &len); 574 if (pp == NULL) 575 pp = of_get_property(dp, "linebytes", &len); 576 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu)) 577 pitch = be32_to_cpup(pp); 578 else 579 pitch = width * ((depth + 7) / 8); 580 581 rsize = (unsigned long)pitch * (unsigned long)height; 582 583 /* Ok, now we try to figure out the address of the framebuffer. 584 * 585 * Unfortunately, Open Firmware doesn't provide a standard way to do 586 * so. All we can do is a dodgy heuristic that happens to work in 587 * practice. On most machines, the "address" property contains what 588 * we need, though not on Matrox cards found in IBM machines. What I've 589 * found that appears to give good results is to go through the PCI 590 * ranges and pick one that is both big enough and if possible encloses 591 * the "address" property. If none match, we pick the biggest 592 */ 593 up = of_get_property(dp, "linux,bootx-addr", &len); 594 if (up == NULL) 595 up = of_get_property(dp, "address", &len); 596 if (up && len == sizeof(u32)) 597 addr_prop = *up; 598 599 /* Hack for when BootX is passing us */ 600 if (no_real_node) 601 goto skip_addr; 602 603 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags)) 604 != NULL; i++) { 605 int match_addrp = 0; 606 607 if (!(flags & IORESOURCE_MEM)) 608 continue; 609 if (asize < rsize) 610 continue; 611 rstart = of_translate_address(dp, addrp); 612 if (rstart == OF_BAD_ADDR) 613 continue; 614 if (addr_prop && (rstart <= addr_prop) && 615 ((rstart + asize) >= (addr_prop + rsize))) 616 match_addrp = 1; 617 if (match_addrp) { 618 address = addr_prop; 619 break; 620 } 621 if (rsize > max_size) { 622 max_size = rsize; 623 address = OF_BAD_ADDR; 624 } 625 626 if (address == OF_BAD_ADDR) 627 address = rstart; 628 } 629 skip_addr: 630 if (address == OF_BAD_ADDR && addr_prop) 631 address = (u64)addr_prop; 632 if (address != OF_BAD_ADDR) { 633 #ifdef CONFIG_PCI 634 const __be32 *vidp, *didp; 635 u32 vid, did; 636 struct pci_dev *pdev; 637 638 vidp = of_get_property(dp, "vendor-id", NULL); 639 didp = of_get_property(dp, "device-id", NULL); 640 if (vidp && didp) { 641 vid = be32_to_cpup(vidp); 642 did = be32_to_cpup(didp); 643 pdev = pci_get_device(vid, did, NULL); 644 if (!pdev || pci_enable_device(pdev)) 645 return; 646 } 647 #endif 648 /* kludge for valkyrie */ 649 if (strcmp(dp->name, "valkyrie") == 0) 650 address += 0x1000; 651 offb_init_fb(no_real_node ? "bootx" : NULL, 652 width, height, depth, pitch, address, 653 foreign_endian, no_real_node ? NULL : dp); 654 } 655 } 656 657 static int __init offb_init(void) 658 { 659 struct device_node *dp = NULL, *boot_disp = NULL; 660 661 if (fb_get_options("offb", NULL)) 662 return -ENODEV; 663 664 /* Check if we have a MacOS display without a node spec */ 665 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) { 666 /* The old code tried to work out which node was the MacOS 667 * display based on the address. I'm dropping that since the 668 * lack of a node spec only happens with old BootX versions 669 * (users can update) and with this code, they'll still get 670 * a display (just not the palette hacks). 671 */ 672 offb_init_nodriver(of_chosen, 1); 673 } 674 675 for_each_node_by_type(dp, "display") { 676 if (of_get_property(dp, "linux,opened", NULL) && 677 of_get_property(dp, "linux,boot-display", NULL)) { 678 boot_disp = dp; 679 offb_init_nodriver(dp, 0); 680 } 681 } 682 for_each_node_by_type(dp, "display") { 683 if (of_get_property(dp, "linux,opened", NULL) && 684 dp != boot_disp) 685 offb_init_nodriver(dp, 0); 686 } 687 688 return 0; 689 } 690 691 692 module_init(offb_init); 693 MODULE_LICENSE("GPL"); 694