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 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 239 240 screen_info->lfb_width = vesa->x_resolution; 241 screen_info->lfb_height = vesa->y_resolution; 242 screen_info->lfb_depth = vesa->bits_per_pixel; 243 screen_info->lfb_linelength = vesa->bytes_per_scanline; 244 screen_info->lfb_base = vesa->phys_base_ptr; 245 screen_info->lfb_size = 246 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 247 65536); 248 screen_info->lfb_size >>= 16; 249 screen_info->red_size = vesa->red_mask_size; 250 screen_info->red_pos = vesa->red_mask_pos; 251 screen_info->green_size = vesa->green_mask_size; 252 screen_info->green_pos = vesa->green_mask_pos; 253 screen_info->blue_size = vesa->blue_mask_size; 254 screen_info->blue_pos = vesa->blue_mask_pos; 255 screen_info->rsvd_size = vesa->reserved_mask_size; 256 screen_info->rsvd_pos = vesa->reserved_mask_pos; 257 #endif 258 } 259 260 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method) 261 { 262 struct pci_rom_header *rom, *ram; 263 int vesa_mode = -1; 264 uint class; 265 bool emulate; 266 int ret; 267 268 /* Only execute VGA ROMs */ 269 pci_read_config_dword(dev, PCI_REVISION_ID, &class); 270 if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 271 debug("%s: Class %#x, should be %#x\n", __func__, class, 272 PCI_CLASS_DISPLAY_VGA); 273 return -ENODEV; 274 } 275 class >>= 8; 276 277 if (!should_load_oprom(dev)) 278 return -ENXIO; 279 280 ret = pci_rom_probe(dev, class, &rom); 281 if (ret) 282 return ret; 283 284 ret = pci_rom_load(rom, &ram); 285 if (ret) 286 return ret; 287 288 if (!board_should_run_oprom(dev)) 289 return -ENXIO; 290 291 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 292 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 293 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 294 #endif 295 debug("Selected vesa mode %#x\n", vesa_mode); 296 297 if (exec_method & PCI_ROM_USE_NATIVE) { 298 #ifdef CONFIG_X86 299 emulate = false; 300 #else 301 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 302 printf("BIOS native execution is only available on x86\n"); 303 return -ENOSYS; 304 } 305 emulate = true; 306 #endif 307 } else { 308 #ifdef CONFIG_BIOSEMU 309 emulate = true; 310 #else 311 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 312 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 313 return -ENOSYS; 314 } 315 emulate = false; 316 #endif 317 } 318 319 if (emulate) { 320 #ifdef CONFIG_BIOSEMU 321 BE_VGAInfo *info; 322 323 ret = biosemu_setup(dev, &info); 324 if (ret) 325 return ret; 326 biosemu_set_interrupt_handler(0x15, int15_handler); 327 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true, 328 vesa_mode, &mode_info); 329 if (ret) 330 return ret; 331 #endif 332 } else { 333 #ifdef CONFIG_X86 334 bios_set_interrupt_handler(0x15, int15_handler); 335 336 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 337 &mode_info); 338 #endif 339 } 340 debug("Final vesa mode %#x\n", mode_info.video_mode); 341 342 return 0; 343 } 344