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 /* fall through */ 145 case cmap_r128: 146 /* Set palette index & data */ 147 out_8(par->cmap_adr + 0xb0, regno); 148 out_le32(par->cmap_adr + 0xb4, 149 (red << 16 | green << 8 | blue)); 150 break; 151 case cmap_M3B: 152 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 153 out_le32(par->cmap_adr + 0x58, 154 in_le32(par->cmap_adr + 0x58) | 0x20); 155 /* Set palette index & data */ 156 out_8(par->cmap_adr + 0xb0, regno); 157 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 158 break; 159 case cmap_radeon: 160 /* Set palette index & data (could be smarter) */ 161 out_8(par->cmap_adr + 0xb0, regno); 162 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 163 break; 164 case cmap_gxt2000: 165 out_le32(((unsigned __iomem *) par->cmap_adr) + regno, 166 (red << 16 | green << 8 | blue)); 167 break; 168 case cmap_avivo: 169 /* Write to both LUTs for now */ 170 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 171 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 172 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 173 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 174 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 175 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 176 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 177 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 178 break; 179 } 180 181 return 0; 182 } 183 184 /* 185 * Blank the display. 186 */ 187 188 static int offb_blank(int blank, struct fb_info *info) 189 { 190 struct offb_par *par = (struct offb_par *) info->par; 191 int i, j; 192 193 if (!par->cmap_adr) 194 return 0; 195 196 if (!par->blanked) 197 if (!blank) 198 return 0; 199 200 par->blanked = blank; 201 202 if (blank) 203 for (i = 0; i < 256; i++) { 204 switch (par->cmap_type) { 205 case cmap_simple: 206 writeb(i, par->cmap_adr); 207 for (j = 0; j < 3; j++) 208 writeb(0, par->cmap_data); 209 break; 210 case cmap_M3A: 211 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 212 out_le32(par->cmap_adr + 0x58, 213 in_le32(par->cmap_adr + 0x58) & ~0x20); 214 /* fall through */ 215 case cmap_r128: 216 /* Set palette index & data */ 217 out_8(par->cmap_adr + 0xb0, i); 218 out_le32(par->cmap_adr + 0xb4, 0); 219 break; 220 case cmap_M3B: 221 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 222 out_le32(par->cmap_adr + 0x58, 223 in_le32(par->cmap_adr + 0x58) | 0x20); 224 /* Set palette index & data */ 225 out_8(par->cmap_adr + 0xb0, i); 226 out_le32(par->cmap_adr + 0xb4, 0); 227 break; 228 case cmap_radeon: 229 out_8(par->cmap_adr + 0xb0, i); 230 out_le32(par->cmap_adr + 0xb4, 0); 231 break; 232 case cmap_gxt2000: 233 out_le32(((unsigned __iomem *) par->cmap_adr) + i, 234 0); 235 break; 236 case cmap_avivo: 237 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 238 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 239 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 240 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 241 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 242 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 243 break; 244 } 245 } else 246 fb_set_cmap(&info->cmap, info); 247 return 0; 248 } 249 250 static int offb_set_par(struct fb_info *info) 251 { 252 struct offb_par *par = (struct offb_par *) info->par; 253 254 /* On avivo, initialize palette control */ 255 if (par->cmap_type == cmap_avivo) { 256 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL); 257 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE); 258 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN); 259 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED); 260 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE); 261 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN); 262 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED); 263 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL); 264 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE); 265 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN); 266 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED); 267 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE); 268 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN); 269 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED); 270 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 271 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 272 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 273 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 274 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 275 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 276 } 277 return 0; 278 } 279 280 static void offb_destroy(struct fb_info *info) 281 { 282 if (info->screen_base) 283 iounmap(info->screen_base); 284 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); 285 fb_dealloc_cmap(&info->cmap); 286 framebuffer_release(info); 287 } 288 289 static const struct fb_ops offb_ops = { 290 .owner = THIS_MODULE, 291 .fb_destroy = offb_destroy, 292 .fb_setcolreg = offb_setcolreg, 293 .fb_set_par = offb_set_par, 294 .fb_blank = offb_blank, 295 .fb_fillrect = cfb_fillrect, 296 .fb_copyarea = cfb_copyarea, 297 .fb_imageblit = cfb_imageblit, 298 }; 299 300 static void __iomem *offb_map_reg(struct device_node *np, int index, 301 unsigned long offset, unsigned long size) 302 { 303 const __be32 *addrp; 304 u64 asize, taddr; 305 unsigned int flags; 306 307 addrp = of_get_pci_address(np, index, &asize, &flags); 308 if (addrp == NULL) 309 addrp = of_get_address(np, index, &asize, &flags); 310 if (addrp == NULL) 311 return NULL; 312 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 313 return NULL; 314 if ((offset + size) > asize) 315 return NULL; 316 taddr = of_translate_address(np, addrp); 317 if (taddr == OF_BAD_ADDR) 318 return NULL; 319 return ioremap(taddr + offset, size); 320 } 321 322 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp, 323 unsigned long address) 324 { 325 struct offb_par *par = (struct offb_par *) info->par; 326 327 if (of_node_name_prefix(dp, "ATY,Rage128")) { 328 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 329 if (par->cmap_adr) 330 par->cmap_type = cmap_r128; 331 } else if (of_node_name_prefix(dp, "ATY,RageM3pA") || 332 of_node_name_prefix(dp, "ATY,RageM3p12A")) { 333 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 334 if (par->cmap_adr) 335 par->cmap_type = cmap_M3A; 336 } else if (of_node_name_prefix(dp, "ATY,RageM3pB")) { 337 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 338 if (par->cmap_adr) 339 par->cmap_type = cmap_M3B; 340 } else if (of_node_name_prefix(dp, "ATY,Rage6")) { 341 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff); 342 if (par->cmap_adr) 343 par->cmap_type = cmap_radeon; 344 } else if (of_node_name_prefix(dp, "ATY,")) { 345 unsigned long base = address & 0xff000000UL; 346 par->cmap_adr = 347 ioremap(base + 0x7ff000, 0x1000) + 0xcc0; 348 par->cmap_data = par->cmap_adr + 1; 349 par->cmap_type = cmap_simple; 350 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") || 351 of_device_is_compatible(dp, "pci1014,21c"))) { 352 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000); 353 if (par->cmap_adr) 354 par->cmap_type = cmap_gxt2000; 355 } else if (of_node_name_prefix(dp, "vga,Display-")) { 356 /* Look for AVIVO initialized by SLOF */ 357 struct device_node *pciparent = of_get_parent(dp); 358 const u32 *vid, *did; 359 vid = of_get_property(pciparent, "vendor-id", NULL); 360 did = of_get_property(pciparent, "device-id", NULL); 361 /* This will match most R5xx */ 362 if (vid && did && *vid == 0x1002 && 363 ((*did >= 0x7100 && *did < 0x7800) || 364 (*did >= 0x9400))) { 365 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000); 366 if (par->cmap_adr) 367 par->cmap_type = cmap_avivo; 368 } 369 of_node_put(pciparent); 370 } else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) { 371 #ifdef __BIG_ENDIAN 372 const __be32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 }; 373 #else 374 const __be32 io_of_addr[3] = { 0x00000001, 0x0, 0x0 }; 375 #endif 376 u64 io_addr = of_translate_address(dp, io_of_addr); 377 if (io_addr != OF_BAD_ADDR) { 378 par->cmap_adr = ioremap(io_addr + 0x3c8, 2); 379 if (par->cmap_adr) { 380 par->cmap_type = cmap_simple; 381 par->cmap_data = par->cmap_adr + 1; 382 } 383 } 384 } 385 info->fix.visual = (par->cmap_type != cmap_unknown) ? 386 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR; 387 } 388 389 static void __init offb_init_fb(const char *name, 390 int width, int height, int depth, 391 int pitch, unsigned long address, 392 int foreign_endian, struct device_node *dp) 393 { 394 unsigned long res_size = pitch * height; 395 struct offb_par *par = &default_par; 396 unsigned long res_start = address; 397 struct fb_fix_screeninfo *fix; 398 struct fb_var_screeninfo *var; 399 struct fb_info *info; 400 401 if (!request_mem_region(res_start, res_size, "offb")) 402 return; 403 404 printk(KERN_INFO 405 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n", 406 width, height, name, address, depth, pitch); 407 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) { 408 printk(KERN_ERR "%pOF: can't use depth = %d\n", dp, depth); 409 release_mem_region(res_start, res_size); 410 return; 411 } 412 413 info = framebuffer_alloc(sizeof(u32) * 16, NULL); 414 415 if (info == 0) { 416 release_mem_region(res_start, res_size); 417 return; 418 } 419 420 fix = &info->fix; 421 var = &info->var; 422 info->par = par; 423 424 if (name) { 425 strcpy(fix->id, "OFfb "); 426 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb ")); 427 fix->id[sizeof(fix->id) - 1] = '\0'; 428 } else 429 snprintf(fix->id, sizeof(fix->id), "OFfb %pOFn", dp); 430 431 432 var->xres = var->xres_virtual = width; 433 var->yres = var->yres_virtual = height; 434 fix->line_length = pitch; 435 436 fix->smem_start = address; 437 fix->smem_len = pitch * height; 438 fix->type = FB_TYPE_PACKED_PIXELS; 439 fix->type_aux = 0; 440 441 par->cmap_type = cmap_unknown; 442 if (depth == 8) 443 offb_init_palette_hacks(info, dp, address); 444 else 445 fix->visual = FB_VISUAL_TRUECOLOR; 446 447 var->xoffset = var->yoffset = 0; 448 switch (depth) { 449 case 8: 450 var->bits_per_pixel = 8; 451 var->red.offset = 0; 452 var->red.length = 8; 453 var->green.offset = 0; 454 var->green.length = 8; 455 var->blue.offset = 0; 456 var->blue.length = 8; 457 var->transp.offset = 0; 458 var->transp.length = 0; 459 break; 460 case 15: /* RGB 555 */ 461 var->bits_per_pixel = 16; 462 var->red.offset = 10; 463 var->red.length = 5; 464 var->green.offset = 5; 465 var->green.length = 5; 466 var->blue.offset = 0; 467 var->blue.length = 5; 468 var->transp.offset = 0; 469 var->transp.length = 0; 470 break; 471 case 16: /* RGB 565 */ 472 var->bits_per_pixel = 16; 473 var->red.offset = 11; 474 var->red.length = 5; 475 var->green.offset = 5; 476 var->green.length = 6; 477 var->blue.offset = 0; 478 var->blue.length = 5; 479 var->transp.offset = 0; 480 var->transp.length = 0; 481 break; 482 case 32: /* RGB 888 */ 483 var->bits_per_pixel = 32; 484 var->red.offset = 16; 485 var->red.length = 8; 486 var->green.offset = 8; 487 var->green.length = 8; 488 var->blue.offset = 0; 489 var->blue.length = 8; 490 var->transp.offset = 24; 491 var->transp.length = 8; 492 break; 493 } 494 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 495 var->transp.msb_right = 0; 496 var->grayscale = 0; 497 var->nonstd = 0; 498 var->activate = 0; 499 var->height = var->width = -1; 500 var->pixclock = 10000; 501 var->left_margin = var->right_margin = 16; 502 var->upper_margin = var->lower_margin = 16; 503 var->hsync_len = var->vsync_len = 8; 504 var->sync = 0; 505 var->vmode = FB_VMODE_NONINTERLACED; 506 507 /* set offb aperture size for generic probing */ 508 info->apertures = alloc_apertures(1); 509 if (!info->apertures) 510 goto out_aper; 511 info->apertures->ranges[0].base = address; 512 info->apertures->ranges[0].size = fix->smem_len; 513 514 info->fbops = &offb_ops; 515 info->screen_base = ioremap(address, fix->smem_len); 516 info->pseudo_palette = (void *) (info + 1); 517 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian; 518 519 fb_alloc_cmap(&info->cmap, 256, 0); 520 521 if (register_framebuffer(info) < 0) 522 goto out_err; 523 524 fb_info(info, "Open Firmware frame buffer device on %pOF\n", dp); 525 return; 526 527 out_err: 528 fb_dealloc_cmap(&info->cmap); 529 iounmap(info->screen_base); 530 out_aper: 531 iounmap(par->cmap_adr); 532 par->cmap_adr = NULL; 533 framebuffer_release(info); 534 release_mem_region(res_start, res_size); 535 } 536 537 538 static void __init offb_init_nodriver(struct device_node *dp, int no_real_node) 539 { 540 unsigned int len; 541 int i, width = 640, height = 480, depth = 8, pitch = 640; 542 unsigned int flags, rsize, addr_prop = 0; 543 unsigned long max_size = 0; 544 u64 rstart, address = OF_BAD_ADDR; 545 const __be32 *pp, *addrp, *up; 546 u64 asize; 547 int foreign_endian = 0; 548 549 #ifdef __BIG_ENDIAN 550 if (of_get_property(dp, "little-endian", NULL)) 551 foreign_endian = FBINFO_FOREIGN_ENDIAN; 552 #else 553 if (of_get_property(dp, "big-endian", NULL)) 554 foreign_endian = FBINFO_FOREIGN_ENDIAN; 555 #endif 556 557 pp = of_get_property(dp, "linux,bootx-depth", &len); 558 if (pp == NULL) 559 pp = of_get_property(dp, "depth", &len); 560 if (pp && len == sizeof(u32)) 561 depth = be32_to_cpup(pp); 562 563 pp = of_get_property(dp, "linux,bootx-width", &len); 564 if (pp == NULL) 565 pp = of_get_property(dp, "width", &len); 566 if (pp && len == sizeof(u32)) 567 width = be32_to_cpup(pp); 568 569 pp = of_get_property(dp, "linux,bootx-height", &len); 570 if (pp == NULL) 571 pp = of_get_property(dp, "height", &len); 572 if (pp && len == sizeof(u32)) 573 height = be32_to_cpup(pp); 574 575 pp = of_get_property(dp, "linux,bootx-linebytes", &len); 576 if (pp == NULL) 577 pp = of_get_property(dp, "linebytes", &len); 578 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu)) 579 pitch = be32_to_cpup(pp); 580 else 581 pitch = width * ((depth + 7) / 8); 582 583 rsize = (unsigned long)pitch * (unsigned long)height; 584 585 /* Ok, now we try to figure out the address of the framebuffer. 586 * 587 * Unfortunately, Open Firmware doesn't provide a standard way to do 588 * so. All we can do is a dodgy heuristic that happens to work in 589 * practice. On most machines, the "address" property contains what 590 * we need, though not on Matrox cards found in IBM machines. What I've 591 * found that appears to give good results is to go through the PCI 592 * ranges and pick one that is both big enough and if possible encloses 593 * the "address" property. If none match, we pick the biggest 594 */ 595 up = of_get_property(dp, "linux,bootx-addr", &len); 596 if (up == NULL) 597 up = of_get_property(dp, "address", &len); 598 if (up && len == sizeof(u32)) 599 addr_prop = *up; 600 601 /* Hack for when BootX is passing us */ 602 if (no_real_node) 603 goto skip_addr; 604 605 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags)) 606 != NULL; i++) { 607 int match_addrp = 0; 608 609 if (!(flags & IORESOURCE_MEM)) 610 continue; 611 if (asize < rsize) 612 continue; 613 rstart = of_translate_address(dp, addrp); 614 if (rstart == OF_BAD_ADDR) 615 continue; 616 if (addr_prop && (rstart <= addr_prop) && 617 ((rstart + asize) >= (addr_prop + rsize))) 618 match_addrp = 1; 619 if (match_addrp) { 620 address = addr_prop; 621 break; 622 } 623 if (rsize > max_size) { 624 max_size = rsize; 625 address = OF_BAD_ADDR; 626 } 627 628 if (address == OF_BAD_ADDR) 629 address = rstart; 630 } 631 skip_addr: 632 if (address == OF_BAD_ADDR && addr_prop) 633 address = (u64)addr_prop; 634 if (address != OF_BAD_ADDR) { 635 #ifdef CONFIG_PCI 636 const __be32 *vidp, *didp; 637 u32 vid, did; 638 struct pci_dev *pdev; 639 640 vidp = of_get_property(dp, "vendor-id", NULL); 641 didp = of_get_property(dp, "device-id", NULL); 642 if (vidp && didp) { 643 vid = be32_to_cpup(vidp); 644 did = be32_to_cpup(didp); 645 pdev = pci_get_device(vid, did, NULL); 646 if (!pdev || pci_enable_device(pdev)) 647 return; 648 } 649 #endif 650 /* kludge for valkyrie */ 651 if (of_node_name_eq(dp, "valkyrie")) 652 address += 0x1000; 653 offb_init_fb(no_real_node ? "bootx" : NULL, 654 width, height, depth, pitch, address, 655 foreign_endian, no_real_node ? NULL : dp); 656 } 657 } 658 659 static int __init offb_init(void) 660 { 661 struct device_node *dp = NULL, *boot_disp = NULL; 662 663 if (fb_get_options("offb", NULL)) 664 return -ENODEV; 665 666 /* Check if we have a MacOS display without a node spec */ 667 if (of_get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) { 668 /* The old code tried to work out which node was the MacOS 669 * display based on the address. I'm dropping that since the 670 * lack of a node spec only happens with old BootX versions 671 * (users can update) and with this code, they'll still get 672 * a display (just not the palette hacks). 673 */ 674 offb_init_nodriver(of_chosen, 1); 675 } 676 677 for_each_node_by_type(dp, "display") { 678 if (of_get_property(dp, "linux,opened", NULL) && 679 of_get_property(dp, "linux,boot-display", NULL)) { 680 boot_disp = dp; 681 offb_init_nodriver(dp, 0); 682 } 683 } 684 for_each_node_by_type(dp, "display") { 685 if (of_get_property(dp, "linux,opened", NULL) && 686 dp != boot_disp) 687 offb_init_nodriver(dp, 0); 688 } 689 690 return 0; 691 } 692 693 694 module_init(offb_init); 695 MODULE_LICENSE("GPL"); 696