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