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 <linux/platform_device.h> 30 #include <asm/io.h> 31 32 #ifdef CONFIG_PPC32 33 #include <asm/bootx.h> 34 #endif 35 36 #include "macmodes.h" 37 38 /* Supported palette hacks */ 39 enum { 40 cmap_unknown, 41 cmap_simple, /* ATI Mach64 */ 42 cmap_r128, /* ATI Rage128 */ 43 cmap_M3A, /* ATI Rage Mobility M3 Head A */ 44 cmap_M3B, /* ATI Rage Mobility M3 Head B */ 45 cmap_radeon, /* ATI Radeon */ 46 cmap_gxt2000, /* IBM GXT2000 */ 47 cmap_avivo, /* ATI R5xx */ 48 cmap_qemu, /* qemu vga */ 49 }; 50 51 struct offb_par { 52 volatile void __iomem *cmap_adr; 53 volatile void __iomem *cmap_data; 54 int cmap_type; 55 int blanked; 56 }; 57 58 struct offb_par default_par; 59 60 #ifdef CONFIG_PPC32 61 extern boot_infos_t *boot_infos; 62 #endif 63 64 /* Definitions used by the Avivo palette hack */ 65 #define AVIVO_DC_LUT_RW_SELECT 0x6480 66 #define AVIVO_DC_LUT_RW_MODE 0x6484 67 #define AVIVO_DC_LUT_RW_INDEX 0x6488 68 #define AVIVO_DC_LUT_SEQ_COLOR 0x648c 69 #define AVIVO_DC_LUT_PWL_DATA 0x6490 70 #define AVIVO_DC_LUT_30_COLOR 0x6494 71 #define AVIVO_DC_LUT_READ_PIPE_SELECT 0x6498 72 #define AVIVO_DC_LUT_WRITE_EN_MASK 0x649c 73 #define AVIVO_DC_LUT_AUTOFILL 0x64a0 74 75 #define AVIVO_DC_LUTA_CONTROL 0x64c0 76 #define AVIVO_DC_LUTA_BLACK_OFFSET_BLUE 0x64c4 77 #define AVIVO_DC_LUTA_BLACK_OFFSET_GREEN 0x64c8 78 #define AVIVO_DC_LUTA_BLACK_OFFSET_RED 0x64cc 79 #define AVIVO_DC_LUTA_WHITE_OFFSET_BLUE 0x64d0 80 #define AVIVO_DC_LUTA_WHITE_OFFSET_GREEN 0x64d4 81 #define AVIVO_DC_LUTA_WHITE_OFFSET_RED 0x64d8 82 83 #define AVIVO_DC_LUTB_CONTROL 0x6cc0 84 #define AVIVO_DC_LUTB_BLACK_OFFSET_BLUE 0x6cc4 85 #define AVIVO_DC_LUTB_BLACK_OFFSET_GREEN 0x6cc8 86 #define AVIVO_DC_LUTB_BLACK_OFFSET_RED 0x6ccc 87 #define AVIVO_DC_LUTB_WHITE_OFFSET_BLUE 0x6cd0 88 #define AVIVO_DC_LUTB_WHITE_OFFSET_GREEN 0x6cd4 89 #define AVIVO_DC_LUTB_WHITE_OFFSET_RED 0x6cd8 90 91 /* 92 * Set a single color register. The values supplied are already 93 * rounded down to the hardware's capabilities (according to the 94 * entries in the var structure). Return != 0 for invalid regno. 95 */ 96 97 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, 98 u_int transp, struct fb_info *info) 99 { 100 struct offb_par *par = (struct offb_par *) info->par; 101 102 if (info->fix.visual == FB_VISUAL_TRUECOLOR) { 103 u32 *pal = info->pseudo_palette; 104 u32 cr = red >> (16 - info->var.red.length); 105 u32 cg = green >> (16 - info->var.green.length); 106 u32 cb = blue >> (16 - info->var.blue.length); 107 u32 value; 108 109 if (regno >= 16) 110 return -EINVAL; 111 112 value = (cr << info->var.red.offset) | 113 (cg << info->var.green.offset) | 114 (cb << info->var.blue.offset); 115 if (info->var.transp.length > 0) { 116 u32 mask = (1 << info->var.transp.length) - 1; 117 mask <<= info->var.transp.offset; 118 value |= mask; 119 } 120 pal[regno] = value; 121 return 0; 122 } 123 124 if (regno > 255) 125 return -EINVAL; 126 127 red >>= 8; 128 green >>= 8; 129 blue >>= 8; 130 131 if (!par->cmap_adr) 132 return 0; 133 134 switch (par->cmap_type) { 135 case cmap_simple: 136 writeb(regno, par->cmap_adr); 137 writeb(red, par->cmap_data); 138 writeb(green, par->cmap_data); 139 writeb(blue, par->cmap_data); 140 break; 141 case cmap_M3A: 142 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 143 out_le32(par->cmap_adr + 0x58, 144 in_le32(par->cmap_adr + 0x58) & ~0x20); 145 fallthrough; 146 case cmap_r128: 147 /* Set palette index & data */ 148 out_8(par->cmap_adr + 0xb0, regno); 149 out_le32(par->cmap_adr + 0xb4, 150 (red << 16 | green << 8 | blue)); 151 break; 152 case cmap_M3B: 153 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 154 out_le32(par->cmap_adr + 0x58, 155 in_le32(par->cmap_adr + 0x58) | 0x20); 156 /* Set palette index & data */ 157 out_8(par->cmap_adr + 0xb0, regno); 158 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue)); 159 break; 160 case cmap_radeon: 161 /* Set palette index & data (could be smarter) */ 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_gxt2000: 166 out_le32(((unsigned __iomem *) par->cmap_adr) + regno, 167 (red << 16 | green << 8 | blue)); 168 break; 169 case cmap_avivo: 170 /* Write to both LUTs for now */ 171 writel(1, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 172 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 173 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 174 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 175 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 176 writeb(regno, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 177 writel(((red) << 22) | ((green) << 12) | ((blue) << 2), 178 par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 179 break; 180 } 181 182 return 0; 183 } 184 185 /* 186 * Blank the display. 187 */ 188 189 static int offb_blank(int blank, struct fb_info *info) 190 { 191 struct offb_par *par = (struct offb_par *) info->par; 192 int i, j; 193 194 if (!par->cmap_adr) 195 return 0; 196 197 if (!par->blanked) 198 if (!blank) 199 return 0; 200 201 par->blanked = blank; 202 203 if (blank) 204 for (i = 0; i < 256; i++) { 205 switch (par->cmap_type) { 206 case cmap_simple: 207 writeb(i, par->cmap_adr); 208 for (j = 0; j < 3; j++) 209 writeb(0, par->cmap_data); 210 break; 211 case cmap_M3A: 212 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */ 213 out_le32(par->cmap_adr + 0x58, 214 in_le32(par->cmap_adr + 0x58) & ~0x20); 215 fallthrough; 216 case cmap_r128: 217 /* Set palette index & data */ 218 out_8(par->cmap_adr + 0xb0, i); 219 out_le32(par->cmap_adr + 0xb4, 0); 220 break; 221 case cmap_M3B: 222 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */ 223 out_le32(par->cmap_adr + 0x58, 224 in_le32(par->cmap_adr + 0x58) | 0x20); 225 /* Set palette index & data */ 226 out_8(par->cmap_adr + 0xb0, i); 227 out_le32(par->cmap_adr + 0xb4, 0); 228 break; 229 case cmap_radeon: 230 out_8(par->cmap_adr + 0xb0, i); 231 out_le32(par->cmap_adr + 0xb4, 0); 232 break; 233 case cmap_gxt2000: 234 out_le32(((unsigned __iomem *) par->cmap_adr) + i, 235 0); 236 break; 237 case cmap_avivo: 238 writel(1, 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 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 242 writeb(i, par->cmap_adr + AVIVO_DC_LUT_RW_INDEX); 243 writel(0, par->cmap_adr + AVIVO_DC_LUT_30_COLOR); 244 break; 245 } 246 } else 247 fb_set_cmap(&info->cmap, info); 248 return 0; 249 } 250 251 static int offb_set_par(struct fb_info *info) 252 { 253 struct offb_par *par = (struct offb_par *) info->par; 254 255 /* On avivo, initialize palette control */ 256 if (par->cmap_type == cmap_avivo) { 257 writel(0, par->cmap_adr + AVIVO_DC_LUTA_CONTROL); 258 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_BLUE); 259 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_GREEN); 260 writel(0, par->cmap_adr + AVIVO_DC_LUTA_BLACK_OFFSET_RED); 261 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_BLUE); 262 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_GREEN); 263 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTA_WHITE_OFFSET_RED); 264 writel(0, par->cmap_adr + AVIVO_DC_LUTB_CONTROL); 265 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_BLUE); 266 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_GREEN); 267 writel(0, par->cmap_adr + AVIVO_DC_LUTB_BLACK_OFFSET_RED); 268 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_BLUE); 269 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_GREEN); 270 writel(0x0000ffff, par->cmap_adr + AVIVO_DC_LUTB_WHITE_OFFSET_RED); 271 writel(1, 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 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_SELECT); 275 writel(0, par->cmap_adr + AVIVO_DC_LUT_RW_MODE); 276 writel(0x0000003f, par->cmap_adr + AVIVO_DC_LUT_WRITE_EN_MASK); 277 } 278 return 0; 279 } 280 281 static void offb_destroy(struct fb_info *info) 282 { 283 if (info->screen_base) 284 iounmap(info->screen_base); 285 release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size); 286 fb_dealloc_cmap(&info->cmap); 287 framebuffer_release(info); 288 } 289 290 static const struct fb_ops offb_ops = { 291 .owner = THIS_MODULE, 292 .fb_destroy = offb_destroy, 293 .fb_setcolreg = offb_setcolreg, 294 .fb_set_par = offb_set_par, 295 .fb_blank = offb_blank, 296 .fb_fillrect = cfb_fillrect, 297 .fb_copyarea = cfb_copyarea, 298 .fb_imageblit = cfb_imageblit, 299 }; 300 301 static void __iomem *offb_map_reg(struct device_node *np, int index, 302 unsigned long offset, unsigned long size) 303 { 304 const __be32 *addrp; 305 u64 asize, taddr; 306 unsigned int flags; 307 308 addrp = of_get_pci_address(np, index, &asize, &flags); 309 if (addrp == NULL) 310 addrp = of_get_address(np, index, &asize, &flags); 311 if (addrp == NULL) 312 return NULL; 313 if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 314 return NULL; 315 if ((offset + size) > asize) 316 return NULL; 317 taddr = of_translate_address(np, addrp); 318 if (taddr == OF_BAD_ADDR) 319 return NULL; 320 return ioremap(taddr + offset, size); 321 } 322 323 static void offb_init_palette_hacks(struct fb_info *info, struct device_node *dp, 324 unsigned long address) 325 { 326 struct offb_par *par = (struct offb_par *) info->par; 327 328 if (of_node_name_prefix(dp, "ATY,Rage128")) { 329 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 330 if (par->cmap_adr) 331 par->cmap_type = cmap_r128; 332 } else if (of_node_name_prefix(dp, "ATY,RageM3pA") || 333 of_node_name_prefix(dp, "ATY,RageM3p12A")) { 334 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 335 if (par->cmap_adr) 336 par->cmap_type = cmap_M3A; 337 } else if (of_node_name_prefix(dp, "ATY,RageM3pB")) { 338 par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff); 339 if (par->cmap_adr) 340 par->cmap_type = cmap_M3B; 341 } else if (of_node_name_prefix(dp, "ATY,Rage6")) { 342 par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff); 343 if (par->cmap_adr) 344 par->cmap_type = cmap_radeon; 345 } else if (of_node_name_prefix(dp, "ATY,")) { 346 unsigned long base = address & 0xff000000UL; 347 par->cmap_adr = 348 ioremap(base + 0x7ff000, 0x1000) + 0xcc0; 349 par->cmap_data = par->cmap_adr + 1; 350 par->cmap_type = cmap_simple; 351 } else if (dp && (of_device_is_compatible(dp, "pci1014,b7") || 352 of_device_is_compatible(dp, "pci1014,21c"))) { 353 par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000); 354 if (par->cmap_adr) 355 par->cmap_type = cmap_gxt2000; 356 } else if (of_node_name_prefix(dp, "vga,Display-")) { 357 /* Look for AVIVO initialized by SLOF */ 358 struct device_node *pciparent = of_get_parent(dp); 359 const u32 *vid, *did; 360 vid = of_get_property(pciparent, "vendor-id", NULL); 361 did = of_get_property(pciparent, "device-id", NULL); 362 /* This will match most R5xx */ 363 if (vid && did && *vid == 0x1002 && 364 ((*did >= 0x7100 && *did < 0x7800) || 365 (*did >= 0x9400))) { 366 par->cmap_adr = offb_map_reg(pciparent, 2, 0, 0x10000); 367 if (par->cmap_adr) 368 par->cmap_type = cmap_avivo; 369 } 370 of_node_put(pciparent); 371 } else if (dp && of_device_is_compatible(dp, "qemu,std-vga")) { 372 #ifdef __BIG_ENDIAN 373 const __be32 io_of_addr[3] = { 0x01000000, 0x0, 0x0 }; 374 #else 375 const __be32 io_of_addr[3] = { 0x00000001, 0x0, 0x0 }; 376 #endif 377 u64 io_addr = of_translate_address(dp, io_of_addr); 378 if (io_addr != OF_BAD_ADDR) { 379 par->cmap_adr = ioremap(io_addr + 0x3c8, 2); 380 if (par->cmap_adr) { 381 par->cmap_type = cmap_simple; 382 par->cmap_data = par->cmap_adr + 1; 383 } 384 } 385 } 386 info->fix.visual = (par->cmap_type != cmap_unknown) ? 387 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR; 388 } 389 390 static void offb_init_fb(struct platform_device *parent, const char *name, 391 int width, int height, int depth, 392 int pitch, unsigned long address, 393 int foreign_endian, struct device_node *dp) 394 { 395 unsigned long res_size = pitch * height; 396 struct offb_par *par = &default_par; 397 unsigned long res_start = address; 398 struct fb_fix_screeninfo *fix; 399 struct fb_var_screeninfo *var; 400 struct fb_info *info; 401 402 if (!request_mem_region(res_start, res_size, "offb")) 403 return; 404 405 printk(KERN_INFO 406 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n", 407 width, height, name, address, depth, pitch); 408 if (depth != 8 && depth != 15 && depth != 16 && depth != 32) { 409 printk(KERN_ERR "%pOF: can't use depth = %d\n", dp, depth); 410 release_mem_region(res_start, res_size); 411 return; 412 } 413 414 info = framebuffer_alloc(sizeof(u32) * 16, &parent->dev); 415 416 if (!info) { 417 release_mem_region(res_start, res_size); 418 return; 419 } 420 platform_set_drvdata(parent, info); 421 422 fix = &info->fix; 423 var = &info->var; 424 info->par = par; 425 426 if (name) { 427 strcpy(fix->id, "OFfb "); 428 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb ")); 429 fix->id[sizeof(fix->id) - 1] = '\0'; 430 } else 431 snprintf(fix->id, sizeof(fix->id), "OFfb %pOFn", dp); 432 433 434 var->xres = var->xres_virtual = width; 435 var->yres = var->yres_virtual = height; 436 fix->line_length = pitch; 437 438 fix->smem_start = address; 439 fix->smem_len = pitch * height; 440 fix->type = FB_TYPE_PACKED_PIXELS; 441 fix->type_aux = 0; 442 443 par->cmap_type = cmap_unknown; 444 if (depth == 8) 445 offb_init_palette_hacks(info, dp, address); 446 else 447 fix->visual = FB_VISUAL_TRUECOLOR; 448 449 var->xoffset = var->yoffset = 0; 450 switch (depth) { 451 case 8: 452 var->bits_per_pixel = 8; 453 var->red.offset = 0; 454 var->red.length = 8; 455 var->green.offset = 0; 456 var->green.length = 8; 457 var->blue.offset = 0; 458 var->blue.length = 8; 459 var->transp.offset = 0; 460 var->transp.length = 0; 461 break; 462 case 15: /* RGB 555 */ 463 var->bits_per_pixel = 16; 464 var->red.offset = 10; 465 var->red.length = 5; 466 var->green.offset = 5; 467 var->green.length = 5; 468 var->blue.offset = 0; 469 var->blue.length = 5; 470 var->transp.offset = 0; 471 var->transp.length = 0; 472 break; 473 case 16: /* RGB 565 */ 474 var->bits_per_pixel = 16; 475 var->red.offset = 11; 476 var->red.length = 5; 477 var->green.offset = 5; 478 var->green.length = 6; 479 var->blue.offset = 0; 480 var->blue.length = 5; 481 var->transp.offset = 0; 482 var->transp.length = 0; 483 break; 484 case 32: /* RGB 888 */ 485 var->bits_per_pixel = 32; 486 var->red.offset = 16; 487 var->red.length = 8; 488 var->green.offset = 8; 489 var->green.length = 8; 490 var->blue.offset = 0; 491 var->blue.length = 8; 492 var->transp.offset = 24; 493 var->transp.length = 8; 494 break; 495 } 496 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 497 var->transp.msb_right = 0; 498 var->grayscale = 0; 499 var->nonstd = 0; 500 var->activate = 0; 501 var->height = var->width = -1; 502 var->pixclock = 10000; 503 var->left_margin = var->right_margin = 16; 504 var->upper_margin = var->lower_margin = 16; 505 var->hsync_len = var->vsync_len = 8; 506 var->sync = 0; 507 var->vmode = FB_VMODE_NONINTERLACED; 508 509 /* set offb aperture size for generic probing */ 510 info->apertures = alloc_apertures(1); 511 if (!info->apertures) 512 goto out_aper; 513 info->apertures->ranges[0].base = address; 514 info->apertures->ranges[0].size = fix->smem_len; 515 516 info->fbops = &offb_ops; 517 info->screen_base = ioremap(address, fix->smem_len); 518 info->pseudo_palette = (void *) (info + 1); 519 info->flags = FBINFO_DEFAULT | FBINFO_MISC_FIRMWARE | foreign_endian; 520 521 fb_alloc_cmap(&info->cmap, 256, 0); 522 523 if (register_framebuffer(info) < 0) 524 goto out_err; 525 526 fb_info(info, "Open Firmware frame buffer device on %pOF\n", dp); 527 return; 528 529 out_err: 530 fb_dealloc_cmap(&info->cmap); 531 iounmap(info->screen_base); 532 out_aper: 533 iounmap(par->cmap_adr); 534 par->cmap_adr = NULL; 535 framebuffer_release(info); 536 release_mem_region(res_start, res_size); 537 } 538 539 540 static void offb_init_nodriver(struct platform_device *parent, struct device_node *dp, 541 int no_real_node) 542 { 543 unsigned int len; 544 int i, width = 640, height = 480, depth = 8, pitch = 640; 545 unsigned int flags, rsize, addr_prop = 0; 546 unsigned long max_size = 0; 547 u64 rstart, address = OF_BAD_ADDR; 548 const __be32 *pp, *addrp, *up; 549 u64 asize; 550 int foreign_endian = 0; 551 552 #ifdef __BIG_ENDIAN 553 if (of_get_property(dp, "little-endian", NULL)) 554 foreign_endian = FBINFO_FOREIGN_ENDIAN; 555 #else 556 if (of_get_property(dp, "big-endian", NULL)) 557 foreign_endian = FBINFO_FOREIGN_ENDIAN; 558 #endif 559 560 pp = of_get_property(dp, "linux,bootx-depth", &len); 561 if (pp == NULL) 562 pp = of_get_property(dp, "depth", &len); 563 if (pp && len == sizeof(u32)) 564 depth = be32_to_cpup(pp); 565 566 pp = of_get_property(dp, "linux,bootx-width", &len); 567 if (pp == NULL) 568 pp = of_get_property(dp, "width", &len); 569 if (pp && len == sizeof(u32)) 570 width = be32_to_cpup(pp); 571 572 pp = of_get_property(dp, "linux,bootx-height", &len); 573 if (pp == NULL) 574 pp = of_get_property(dp, "height", &len); 575 if (pp && len == sizeof(u32)) 576 height = be32_to_cpup(pp); 577 578 pp = of_get_property(dp, "linux,bootx-linebytes", &len); 579 if (pp == NULL) 580 pp = of_get_property(dp, "linebytes", &len); 581 if (pp && len == sizeof(u32) && (*pp != 0xffffffffu)) 582 pitch = be32_to_cpup(pp); 583 else 584 pitch = width * ((depth + 7) / 8); 585 586 rsize = (unsigned long)pitch * (unsigned long)height; 587 588 /* Ok, now we try to figure out the address of the framebuffer. 589 * 590 * Unfortunately, Open Firmware doesn't provide a standard way to do 591 * so. All we can do is a dodgy heuristic that happens to work in 592 * practice. On most machines, the "address" property contains what 593 * we need, though not on Matrox cards found in IBM machines. What I've 594 * found that appears to give good results is to go through the PCI 595 * ranges and pick one that is both big enough and if possible encloses 596 * the "address" property. If none match, we pick the biggest 597 */ 598 up = of_get_property(dp, "linux,bootx-addr", &len); 599 if (up == NULL) 600 up = of_get_property(dp, "address", &len); 601 if (up && len == sizeof(u32)) 602 addr_prop = *up; 603 604 /* Hack for when BootX is passing us */ 605 if (no_real_node) 606 goto skip_addr; 607 608 for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags)) 609 != NULL; i++) { 610 int match_addrp = 0; 611 612 if (!(flags & IORESOURCE_MEM)) 613 continue; 614 if (asize < rsize) 615 continue; 616 rstart = of_translate_address(dp, addrp); 617 if (rstart == OF_BAD_ADDR) 618 continue; 619 if (addr_prop && (rstart <= addr_prop) && 620 ((rstart + asize) >= (addr_prop + rsize))) 621 match_addrp = 1; 622 if (match_addrp) { 623 address = addr_prop; 624 break; 625 } 626 if (rsize > max_size) { 627 max_size = rsize; 628 address = OF_BAD_ADDR; 629 } 630 631 if (address == OF_BAD_ADDR) 632 address = rstart; 633 } 634 skip_addr: 635 if (address == OF_BAD_ADDR && addr_prop) 636 address = (u64)addr_prop; 637 if (address != OF_BAD_ADDR) { 638 #ifdef CONFIG_PCI 639 const __be32 *vidp, *didp; 640 u32 vid, did; 641 struct pci_dev *pdev; 642 643 vidp = of_get_property(dp, "vendor-id", NULL); 644 didp = of_get_property(dp, "device-id", NULL); 645 if (vidp && didp) { 646 vid = be32_to_cpup(vidp); 647 did = be32_to_cpup(didp); 648 pdev = pci_get_device(vid, did, NULL); 649 if (!pdev || pci_enable_device(pdev)) 650 return; 651 } 652 #endif 653 /* kludge for valkyrie */ 654 if (of_node_name_eq(dp, "valkyrie")) 655 address += 0x1000; 656 offb_init_fb(parent, no_real_node ? "bootx" : NULL, 657 width, height, depth, pitch, address, 658 foreign_endian, no_real_node ? NULL : dp); 659 } 660 } 661 662 static int offb_remove(struct platform_device *pdev) 663 { 664 struct fb_info *info = platform_get_drvdata(pdev); 665 666 if (info) 667 unregister_framebuffer(info); 668 669 return 0; 670 } 671 672 static int offb_probe_bootx_noscreen(struct platform_device *pdev) 673 { 674 offb_init_nodriver(pdev, of_chosen, 1); 675 676 return 0; 677 } 678 679 static struct platform_driver offb_driver_bootx_noscreen = { 680 .driver = { 681 .name = "bootx-noscreen", 682 }, 683 .probe = offb_probe_bootx_noscreen, 684 .remove = offb_remove, 685 }; 686 687 static int offb_probe_display(struct platform_device *pdev) 688 { 689 offb_init_nodriver(pdev, pdev->dev.of_node, 0); 690 691 return 0; 692 } 693 694 static const struct of_device_id offb_of_match_display[] = { 695 { .compatible = "display", }, 696 { }, 697 }; 698 MODULE_DEVICE_TABLE(of, offb_of_match_display); 699 700 static struct platform_driver offb_driver_display = { 701 .driver = { 702 .name = "of-display", 703 .of_match_table = offb_of_match_display, 704 }, 705 .probe = offb_probe_display, 706 .remove = offb_remove, 707 }; 708 709 static int __init offb_init(void) 710 { 711 if (fb_get_options("offb", NULL)) 712 return -ENODEV; 713 714 platform_driver_register(&offb_driver_bootx_noscreen); 715 platform_driver_register(&offb_driver_display); 716 717 return 0; 718 } 719 module_init(offb_init); 720 721 static void __exit offb_exit(void) 722 { 723 platform_driver_unregister(&offb_driver_display); 724 platform_driver_unregister(&offb_driver_bootx_noscreen); 725 } 726 module_exit(offb_exit); 727 728 MODULE_LICENSE("GPL"); 729