drivers/pci/pci_rom.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2014 Google, Inc
   4  *
   5  * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
   6  *
   7  * Modifications are:
   8  * Copyright (C) 2003-2004 Linux Networx
   9  * (Written by Eric Biederman <[email protected]> for Linux Networx)
  10  * Copyright (C) 2003-2006 Ronald G. Minnich <[email protected]>
  11  * Copyright (C) 2004-2005 Li-Ta Lo <[email protected]>
  12  * Copyright (C) 2005-2006 Tyan
  13  * (Written by Yinghai Lu <[email protected]> for Tyan)
  14  * Copyright (C) 2005-2009 coresystems GmbH
  15  * (Written by Stefan Reinauer <[email protected]> for coresystems GmbH)
  16  *
  17  * PCI Bus Services, see include/linux/pci.h for further explanation.
  18  *
  19  * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
  20  * David Mosberger-Tang
  21  *
  22  * Copyright 1997 -- 1999 Martin Mares <[email protected]>
  23  */
  24
  25 #define LOG_CATEGORY UCLASS_PCI
  26
  27 #include <bios_emul.h>
  28 #include <bloblist.h>
  29 #include <bootstage.h>
  30 #include <dm.h>
  31 #include <errno.h>
  32 #include <init.h>
  33 #include <log.h>
  34 #include <malloc.h>
  35 #include <pci.h>
  36 #include <pci_rom.h>
  37 #include <spl.h>
  38 #include <time.h>
  39 #include <vesa.h>
  40 #include <video.h>
  41 #include <acpi/acpi_s3.h>
  42 #include <asm/global_data.h>
  43 #include <linux/screen_info.h>
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 __weak bool board_should_run_oprom(struct udevice *dev)
  48 {
  49 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME)
  50         if (gd->arch.prev_sleep_state == ACPI_S3) {
  51                 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN))
  52                         return true;
  53                 else
  54                         return false;
  55         }
  56 #endif
  57
  58         return true;
  59 }
  60
  61 __weak bool board_should_load_oprom(struct udevice *dev)
  62 {
  63         return true;
  64 }
  65
  66 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
  67 {
  68         return vendev;
  69 }
  70
  71 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
  72 {
  73         struct pci_child_plat *pplat = dev_get_parent_plat(dev);
  74         struct pci_rom_header *rom_header;
  75         struct pci_rom_data *rom_data;
  76         u16 rom_vendor, rom_device;
  77         u32 rom_class;
  78         u32 vendev;
  79         u32 mapped_vendev;
  80         u32 rom_address;
  81
  82         vendev = pplat->vendor << 16 | pplat->device;
  83         mapped_vendev = board_map_oprom_vendev(vendev);
  84         if (vendev != mapped_vendev)
  85                 debug("Device ID mapped to %#08x\n", mapped_vendev);
  86
  87 #ifdef CONFIG_VGA_BIOS_ADDR
  88         rom_address = CONFIG_VGA_BIOS_ADDR;
  89 #else
  90
  91         dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
  92         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  93                 debug("%s: rom_address=%x\n", __func__, rom_address);
  94                 return -ENOENT;
  95         }
  96         rom_address &= PCI_ROM_ADDRESS_MASK;
  97
  98         /* Enable expansion ROM address decoding. */
  99         dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
 100                               rom_address | PCI_ROM_ADDRESS_ENABLE);
 101 #endif
 102         debug("Option ROM address %x\n", rom_address);
 103         rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
 104
 105         debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
 106               le16_to_cpu(rom_header->signature),
 107               rom_header->size * 512, le16_to_cpu(rom_header->data));
 108
 109         if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
 110                 printf("Incorrect expansion ROM header signature %04x\n",
 111                        le16_to_cpu(rom_header->signature));
 112 #ifndef CONFIG_VGA_BIOS_ADDR
 113                 /* Disable expansion ROM address decoding */
 114                 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
 115 #endif
 116                 return -EINVAL;
 117         }
 118
 119         rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
 120         rom_vendor = le16_to_cpu(rom_data->vendor);
 121         rom_device = le16_to_cpu(rom_data->device);
 122
 123         debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
 124               rom_vendor, rom_device);
 125
 126         /* If the device id is mapped, a mismatch is expected */
 127         if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
 128             (vendev == mapped_vendev)) {
 129                 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
 130                        rom_vendor, rom_device);
 131                 /* Continue anyway */
 132         }
 133
 134         rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
 135         debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
 136               rom_class, rom_data->type);
 137
 138         if (pplat->class != rom_class) {
 139                 debug("Class Code mismatch ROM %06x, dev %06x\n",
 140                       rom_class, pplat->class);
 141         }
 142         *hdrp = rom_header;
 143
 144         return 0;
 145 }
 146
 147 /**
 148  * pci_rom_load() - Load a ROM image and return a pointer to it
 149  *
 150  * @rom_header:         Pointer to ROM image
 151  * @ram_headerp:        Returns a pointer to the image in RAM
 152  * @allocedp:           Returns true if @ram_headerp was allocated and needs
 153  *                      to be freed
 154  * Return: 0 if OK, -ve on error. Note that @allocedp is set up regardless of
 155  * the error state. Even if this function returns an error, it may have
 156  * allocated memory.
 157  */
 158 static int pci_rom_load(struct pci_rom_header *rom_header,
 159                         struct pci_rom_header **ram_headerp, bool *allocedp)
 160 {
 161         struct pci_rom_data *rom_data;
 162         unsigned int rom_size;
 163         unsigned int image_size = 0;
 164         void *target;
 165
 166         *allocedp = false;
 167         do {
 168                 /* Get next image, until we see an x86 version */
 169                 rom_header = (struct pci_rom_header *)((void *)rom_header +
 170                                                             image_size);
 171
 172                 rom_data = (struct pci_rom_data *)((void *)rom_header +
 173                                 le16_to_cpu(rom_header->data));
 174
 175                 image_size = le16_to_cpu(rom_data->ilen) * 512;
 176         } while ((rom_data->type != 0) && (rom_data->indicator == 0));
 177
 178         if (rom_data->type != 0)
 179                 return -EACCES;
 180
 181         rom_size = rom_header->size * 512;
 182
 183 #ifdef PCI_VGA_RAM_IMAGE_START
 184         target = (void *)PCI_VGA_RAM_IMAGE_START;
 185 #else
 186         target = (void *)malloc(rom_size);
 187         if (!target)
 188                 return -ENOMEM;
 189         *allocedp = true;
 190 #endif
 191         if (target != rom_header) {
 192                 ulong start = get_timer(0);
 193
 194                 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
 195                       rom_header, target, rom_size);
 196                 memcpy(target, rom_header, rom_size);
 197                 if (memcmp(target, rom_header, rom_size)) {
 198                         printf("VGA ROM copy failed\n");
 199                         return -EFAULT;
 200                 }
 201                 debug("Copy took %lums\n", get_timer(start));
 202         }
 203         *ram_headerp = target;
 204
 205         return 0;
 206 }
 207
 208 struct vesa_state mode_info;
 209
 210 void setup_video(struct screen_info *screen_info)
 211 {
 212         struct vesa_mode_info *vesa = &mode_info.vesa;
 213
 214         /* Sanity test on VESA parameters */
 215         if (!vesa->x_resolution || !vesa->y_resolution)
 216                 return;
 217
 218         screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
 219
 220         screen_info->lfb_width = vesa->x_resolution;
 221         screen_info->lfb_height = vesa->y_resolution;
 222         screen_info->lfb_depth = vesa->bits_per_pixel;
 223         screen_info->lfb_linelength = vesa->bytes_per_scanline;
 224         screen_info->lfb_base = vesa->phys_base_ptr;
 225         screen_info->lfb_size =
 226                 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
 227                       65536);
 228         screen_info->lfb_size >>= 16;
 229         screen_info->red_size = vesa->red_mask_size;
 230         screen_info->red_pos = vesa->red_mask_pos;
 231         screen_info->green_size = vesa->green_mask_size;
 232         screen_info->green_pos = vesa->green_mask_pos;
 233         screen_info->blue_size = vesa->blue_mask_size;
 234         screen_info->blue_pos = vesa->blue_mask_pos;
 235         screen_info->rsvd_size = vesa->reserved_mask_size;
 236         screen_info->rsvd_pos = vesa->reserved_mask_pos;
 237 }
 238
 239 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
 240                         int exec_method)
 241 {
 242         struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 243         struct pci_rom_header *rom = NULL, *ram = NULL;
 244         int vesa_mode = -1;
 245         bool emulate, alloced;
 246         int ret;
 247
 248         /* Only execute VGA ROMs */
 249         if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
 250                 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
 251                       PCI_CLASS_DISPLAY_VGA);
 252                 return -ENODEV;
 253         }
 254
 255         if (!board_should_load_oprom(dev))
 256                 return log_msg_ret("Should not load OPROM", -ENXIO);
 257
 258         ret = pci_rom_probe(dev, &rom);
 259         if (ret)
 260                 return log_msg_ret("pro", ret);
 261
 262         ret = pci_rom_load(rom, &ram, &alloced);
 263         if (ret) {
 264                 ret = log_msg_ret("ld", ret);
 265                 goto err;
 266         }
 267
 268         if (!board_should_run_oprom(dev)) {
 269                 ret = log_msg_ret("run", -ENXIO);
 270                 goto err;
 271         }
 272
 273 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
 274                 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
 275         vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
 276 #endif
 277         debug("Selected vesa mode 0x%x\n", vesa_mode);
 278
 279         if (exec_method & PCI_ROM_USE_NATIVE) {
 280 #ifdef CONFIG_X86
 281                 emulate = false;
 282 #else
 283                 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 284                         printf("BIOS native execution is only available on x86\n");
 285                         ret = -ENOSYS;
 286                         goto err;
 287                 }
 288                 emulate = true;
 289 #endif
 290         } else {
 291 #ifdef CONFIG_BIOSEMU
 292                 emulate = true;
 293 #else
 294                 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 295                         printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
 296                         ret = -ENOSYS;
 297                         goto err;
 298                 }
 299                 emulate = false;
 300 #endif
 301         }
 302
 303         if (emulate) {
 304                 if (CONFIG_IS_ENABLED(BIOSEMU)) {
 305                         BE_VGAInfo *info;
 306
 307                         log_debug("Running video BIOS with emulator...");
 308                         ret = biosemu_setup(dev, &info);
 309                         if (ret)
 310                                 goto err;
 311                         biosemu_set_interrupt_handler(0x15, int15_handler);
 312                         ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
 313                                           true, vesa_mode, &mode_info);
 314                         log_debug("done\n");
 315                         if (ret)
 316                                 goto err;
 317                 }
 318         } else {
 319 #if defined(CONFIG_X86) && (CONFIG_IS_ENABLED(X86_32BIT_INIT) || CONFIG_TPL)
 320                 log_debug("Running video BIOS...");
 321                 bios_set_interrupt_handler(0x15, int15_handler);
 322
 323                 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
 324                                 &mode_info);
 325                 log_debug("done\n");
 326 #endif
 327         }
 328         debug("Final vesa mode %x\n", mode_info.video_mode);
 329         ret = 0;
 330
 331 err:
 332         if (alloced)
 333                 free(ram);
 334         return ret;
 335 }
 336
 337 int vesa_setup_video_priv(struct vesa_mode_info *vesa, u64 fb,
 338                           struct video_priv *uc_priv,
 339                           struct video_uc_plat *plat)
 340 {
 341         if (!vesa->x_resolution)
 342                 return log_msg_ret("No x resolution", -ENXIO);
 343         uc_priv->xsize = vesa->x_resolution;
 344         uc_priv->ysize = vesa->y_resolution;
 345         uc_priv->line_length = vesa->bytes_per_scanline;
 346         switch (vesa->bits_per_pixel) {
 347         case 32:
 348         case 24:
 349                 uc_priv->bpix = VIDEO_BPP32;
 350                 break;
 351         case 16:
 352                 uc_priv->bpix = VIDEO_BPP16;
 353                 break;
 354         default:
 355                 return -EPROTONOSUPPORT;
 356         }
 357
 358         /* Use double buffering if enabled */
 359         if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
 360                 plat->copy_base = fb;
 361         else
 362                 plat->base = fb;
 363         log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
 364         plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
 365
 366         return 0;
 367 }
 368
 369 int vesa_setup_video(struct udevice *dev, int (*int15_handler)(void))
 370 {
 371         struct video_uc_plat *plat = dev_get_uclass_plat(dev);
 372         struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 373         int ret;
 374
 375         /* If we are running from EFI or coreboot, this can't work */
 376         if (!ll_boot_init()) {
 377                 printf("Not available (previous bootloader prevents it)\n");
 378                 return -EPERM;
 379         }
 380
 381         /* In U-Boot proper, collect the information added by SPL (see below) */
 382         if (IS_ENABLED(CONFIG_SPL_VIDEO) && xpl_phase() > PHASE_SPL &&
 383             CONFIG_IS_ENABLED(BLOBLIST)) {
 384                 struct video_handoff *ho;
 385
 386                 ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
 387                 if (!ho)
 388                         return log_msg_ret("blf", -ENOENT);
 389                 plat->base = ho->fb;
 390                 plat->size = ho->size;
 391                 uc_priv->xsize = ho->xsize;
 392                 uc_priv->ysize = ho->ysize;
 393                 uc_priv->line_length = ho->line_length;
 394                 uc_priv->bpix = ho->bpix;
 395         } else {
 396                 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
 397                 ret = dm_pci_run_vga_bios(dev, int15_handler,
 398                                           PCI_ROM_USE_NATIVE |
 399                                           PCI_ROM_ALLOW_FALLBACK);
 400                 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
 401                 if (ret) {
 402                         debug("failed to run video BIOS: %d\n", ret);
 403                         return ret;
 404                 }
 405
 406                 ret = vesa_setup_video_priv(&mode_info.vesa,
 407                                             mode_info.vesa.phys_base_ptr,
 408                                             uc_priv, plat);
 409                 if (ret) {
 410                         if (ret == -ENFILE) {
 411                                 /*
 412                                  * See video-uclass.c for how to set up reserved
 413                                  * memory in your video driver
 414                                  */
 415                                 log_err("CONFIG_VIDEO_COPY enabled but driver '%s' set up no reserved memory\n",
 416                                         dev->driver->name);
 417                         }
 418
 419                         debug("No video mode configured\n");
 420                         return ret;
 421                 }
 422         }
 423
 424         printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
 425                mode_info.vesa.bits_per_pixel);
 426
 427         /* In SPL, store the information for use by U-Boot proper */
 428         if (xpl_phase() == PHASE_SPL && CONFIG_IS_ENABLED(BLOBLIST)) {
 429                 struct video_handoff *ho;
 430
 431                 ho = bloblist_add(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho), 0);
 432                 if (!ho)
 433                         return log_msg_ret("blc", -ENOMEM);
 434
 435                 ho->fb = plat->base;
 436                 ho->size = plat->size;
 437                 ho->xsize = uc_priv->xsize;
 438                 ho->ysize = uc_priv->ysize;
 439                 ho->line_length = uc_priv->line_length;
 440                 ho->bpix = uc_priv->bpix;
 441         }
 442
 443         return 0;
 444 }