drivers/pci/pci_rom.c

   1 /*
   2  * Copyright (C) 2014 Google, Inc
   3  *
   4  * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
   5  *
   6  * Modifications are:
   7  * Copyright (C) 2003-2004 Linux Networx
   8  * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
   9  * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
  10  * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
  11  * Copyright (C) 2005-2006 Tyan
  12  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
  13  * Copyright (C) 2005-2009 coresystems GmbH
  14  * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
  15  *
  16  * PCI Bus Services, see include/linux/pci.h for further explanation.
  17  *
  18  * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
  19  * David Mosberger-Tang
  20  *
  21  * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
  22
  23  * SPDX-License-Identifier:     GPL-2.0
  24  */
  25
  26 #include <common.h>
  27 #include <bios_emul.h>
  28 #include <errno.h>
  29 #include <malloc.h>
  30 #include <pci.h>
  31 #include <pci_rom.h>
  32 #include <vbe.h>
  33 #include <video_fb.h>
  34 #include <linux/screen_info.h>
  35
  36 #ifdef CONFIG_HAVE_ACPI_RESUME
  37 #include <asm/acpi.h>
  38 #endif
  39
  40 __weak bool board_should_run_oprom(pci_dev_t dev)
  41 {
  42         return true;
  43 }
  44
  45 static bool should_load_oprom(pci_dev_t dev)
  46 {
  47 #ifdef CONFIG_HAVE_ACPI_RESUME
  48         if (acpi_get_slp_type() == 3)
  49                 return false;
  50 #endif
  51         if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM))
  52                 return 1;
  53         if (board_should_run_oprom(dev))
  54                 return 1;
  55
  56         return 0;
  57 }
  58
  59 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
  60 {
  61         return vendev;
  62 }
  63
  64 static int pci_rom_probe(pci_dev_t dev, uint class,
  65                          struct pci_rom_header **hdrp)
  66 {
  67         struct pci_rom_header *rom_header;
  68         struct pci_rom_data *rom_data;
  69         u16 vendor, device;
  70         u16 rom_vendor, rom_device;
  71         u32 rom_class;
  72         u32 vendev;
  73         u32 mapped_vendev;
  74         u32 rom_address;
  75
  76         pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
  77         pci_read_config_word(dev, PCI_DEVICE_ID, &device);
  78         vendev = vendor << 16 | device;
  79         mapped_vendev = board_map_oprom_vendev(vendev);
  80         if (vendev != mapped_vendev)
  81                 debug("Device ID mapped to %#08x\n", mapped_vendev);
  82
  83 #ifdef CONFIG_VGA_BIOS_ADDR
  84         rom_address = CONFIG_VGA_BIOS_ADDR;
  85 #else
  86
  87         pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address);
  88         if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
  89                 debug("%s: rom_address=%x\n", __func__, rom_address);
  90                 return -ENOENT;
  91         }
  92
  93         /* Enable expansion ROM address decoding. */
  94         pci_write_config_dword(dev, PCI_ROM_ADDRESS,
  95                                rom_address | PCI_ROM_ADDRESS_ENABLE);
  96 #endif
  97         debug("Option ROM address %x\n", rom_address);
  98         rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
  99
 100         debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
 101               le16_to_cpu(rom_header->signature),
 102               rom_header->size * 512, le16_to_cpu(rom_header->data));
 103
 104         if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
 105                 printf("Incorrect expansion ROM header signature %04x\n",
 106                        le16_to_cpu(rom_header->signature));
 107 #ifndef CONFIG_VGA_BIOS_ADDR
 108                 /* Disable expansion ROM address decoding */
 109                 pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address);
 110 #endif
 111                 return -EINVAL;
 112         }
 113
 114         rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
 115         rom_vendor = le16_to_cpu(rom_data->vendor);
 116         rom_device = le16_to_cpu(rom_data->device);
 117
 118         debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
 119               rom_vendor, rom_device);
 120
 121         /* If the device id is mapped, a mismatch is expected */
 122         if ((vendor != rom_vendor || device != rom_device) &&
 123             (vendev == mapped_vendev)) {
 124                 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
 125                        rom_vendor, rom_device);
 126                 /* Continue anyway */
 127         }
 128
 129         rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
 130         debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
 131               rom_class, rom_data->type);
 132
 133         if (class != rom_class) {
 134                 debug("Class Code mismatch ROM %06x, dev %06x\n",
 135                       rom_class, class);
 136         }
 137         *hdrp = rom_header;
 138
 139         return 0;
 140 }
 141
 142 int pci_rom_load(struct pci_rom_header *rom_header,
 143                  struct pci_rom_header **ram_headerp)
 144 {
 145         struct pci_rom_data *rom_data;
 146         unsigned int rom_size;
 147         unsigned int image_size = 0;
 148         void *target;
 149
 150         do {
 151                 /* Get next image, until we see an x86 version */
 152                 rom_header = (struct pci_rom_header *)((void *)rom_header +
 153                                                             image_size);
 154
 155                 rom_data = (struct pci_rom_data *)((void *)rom_header +
 156                                 le16_to_cpu(rom_header->data));
 157
 158                 image_size = le16_to_cpu(rom_data->ilen) * 512;
 159         } while ((rom_data->type != 0) && (rom_data->indicator == 0));
 160
 161         if (rom_data->type != 0)
 162                 return -EACCES;
 163
 164         rom_size = rom_header->size * 512;
 165
 166 #ifdef PCI_VGA_RAM_IMAGE_START
 167         target = (void *)PCI_VGA_RAM_IMAGE_START;
 168 #else
 169         target = (void *)malloc(rom_size);
 170         if (!target)
 171                 return -ENOMEM;
 172 #endif
 173         if (target != rom_header) {
 174                 ulong start = get_timer(0);
 175
 176                 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
 177                       rom_header, target, rom_size);
 178                 memcpy(target, rom_header, rom_size);
 179                 if (memcmp(target, rom_header, rom_size)) {
 180                         printf("VGA ROM copy failed\n");
 181                         return -EFAULT;
 182                 }
 183                 debug("Copy took %lums\n", get_timer(start));
 184         }
 185         *ram_headerp = target;
 186
 187         return 0;
 188 }
 189
 190 static struct vbe_mode_info mode_info;
 191
 192 int vbe_get_video_info(struct graphic_device *gdev)
 193 {
 194 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
 195         struct vesa_mode_info *vesa = &mode_info.vesa;
 196
 197         gdev->winSizeX = vesa->x_resolution;
 198         gdev->winSizeY = vesa->y_resolution;
 199
 200         gdev->plnSizeX = vesa->x_resolution;
 201         gdev->plnSizeY = vesa->y_resolution;
 202
 203         gdev->gdfBytesPP = vesa->bits_per_pixel / 8;
 204
 205         switch (vesa->bits_per_pixel) {
 206         case 32:
 207         case 24:
 208                 gdev->gdfIndex = GDF_32BIT_X888RGB;
 209                 break;
 210         case 16:
 211                 gdev->gdfIndex = GDF_16BIT_565RGB;
 212                 break;
 213         default:
 214                 gdev->gdfIndex = GDF__8BIT_INDEX;
 215                 break;
 216         }
 217
 218         gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
 219         gdev->pciBase = vesa->phys_base_ptr;
 220
 221         gdev->frameAdrs = vesa->phys_base_ptr;
 222         gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;
 223
 224         gdev->vprBase = vesa->phys_base_ptr;
 225         gdev->cprBase = vesa->phys_base_ptr;
 226
 227         return gdev->winSizeX ? 0 : -ENOSYS;
 228 #else
 229         return -ENOSYS;
 230 #endif
 231 }
 232
 233 void setup_video(struct screen_info *screen_info)
 234 {
 235 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
 236         struct vesa_mode_info *vesa = &mode_info.vesa;
 237
 238         /* Sanity test on VESA parameters */
 239         if (!vesa->x_resolution || !vesa->y_resolution)
 240                 return;
 241
 242         screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
 243
 244         screen_info->lfb_width = vesa->x_resolution;
 245         screen_info->lfb_height = vesa->y_resolution;
 246         screen_info->lfb_depth = vesa->bits_per_pixel;
 247         screen_info->lfb_linelength = vesa->bytes_per_scanline;
 248         screen_info->lfb_base = vesa->phys_base_ptr;
 249         screen_info->lfb_size =
 250                 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
 251                       65536);
 252         screen_info->lfb_size >>= 16;
 253         screen_info->red_size = vesa->red_mask_size;
 254         screen_info->red_pos = vesa->red_mask_pos;
 255         screen_info->green_size = vesa->green_mask_size;
 256         screen_info->green_pos = vesa->green_mask_pos;
 257         screen_info->blue_size = vesa->blue_mask_size;
 258         screen_info->blue_pos = vesa->blue_mask_pos;
 259         screen_info->rsvd_size = vesa->reserved_mask_size;
 260         screen_info->rsvd_pos = vesa->reserved_mask_pos;
 261 #endif
 262 }
 263
 264 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method)
 265 {
 266         struct pci_rom_header *rom, *ram;
 267         int vesa_mode = -1;
 268         uint class;
 269         bool emulate;
 270         int ret;
 271
 272         /* Only execute VGA ROMs */
 273         pci_read_config_dword(dev, PCI_REVISION_ID, &class);
 274         if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
 275                 debug("%s: Class %#x, should be %#x\n", __func__, class,
 276                       PCI_CLASS_DISPLAY_VGA);
 277                 return -ENODEV;
 278         }
 279         class >>= 8;
 280
 281         if (!should_load_oprom(dev))
 282                 return -ENXIO;
 283
 284         ret = pci_rom_probe(dev, class, &rom);
 285         if (ret)
 286                 return ret;
 287
 288         ret = pci_rom_load(rom, &ram);
 289         if (ret)
 290                 return ret;
 291
 292         if (!board_should_run_oprom(dev))
 293                 return -ENXIO;
 294
 295 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
 296                 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
 297         vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
 298 #endif
 299         debug("Selected vesa mode %#x\n", vesa_mode);
 300
 301         if (exec_method & PCI_ROM_USE_NATIVE) {
 302 #ifdef CONFIG_X86
 303                 emulate = false;
 304 #else
 305                 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 306                         printf("BIOS native execution is only available on x86\n");
 307                         return -ENOSYS;
 308                 }
 309                 emulate = true;
 310 #endif
 311         } else {
 312 #ifdef CONFIG_BIOSEMU
 313                 emulate = true;
 314 #else
 315                 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 316                         printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
 317                         return -ENOSYS;
 318                 }
 319                 emulate = false;
 320 #endif
 321         }
 322
 323         if (emulate) {
 324 #ifdef CONFIG_BIOSEMU
 325                 BE_VGAInfo *info;
 326
 327                 ret = biosemu_setup(dev, &info);
 328                 if (ret)
 329                         return ret;
 330                 biosemu_set_interrupt_handler(0x15, int15_handler);
 331                 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true,
 332                                   vesa_mode, &mode_info);
 333                 if (ret)
 334                         return ret;
 335 #endif
 336         } else {
 337 #ifdef CONFIG_X86
 338                 bios_set_interrupt_handler(0x15, int15_handler);
 339
 340                 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
 341                                 &mode_info);
 342 #endif
 343         }
 344         debug("Final vesa mode %#x\n", mode_info.video_mode);
 345
 346         return 0;
 347 }