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 35 #ifdef CONFIG_HAVE_ACPI_RESUME 36 #include <asm/acpi.h> 37 #endif 38 39 __weak bool board_should_run_oprom(pci_dev_t dev) 40 { 41 return true; 42 } 43 44 static bool should_load_oprom(pci_dev_t dev) 45 { 46 #ifdef CONFIG_HAVE_ACPI_RESUME 47 if (acpi_get_slp_type() == 3) 48 return false; 49 #endif 50 if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM)) 51 return 1; 52 if (board_should_run_oprom(dev)) 53 return 1; 54 55 return 0; 56 } 57 58 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 59 { 60 return vendev; 61 } 62 63 static int pci_rom_probe(pci_dev_t dev, uint class, 64 struct pci_rom_header **hdrp) 65 { 66 struct pci_rom_header *rom_header; 67 struct pci_rom_data *rom_data; 68 u16 vendor, device; 69 u16 rom_vendor, rom_device; 70 u32 rom_class; 71 u32 vendev; 72 u32 mapped_vendev; 73 u32 rom_address; 74 75 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor); 76 pci_read_config_word(dev, PCI_DEVICE_ID, &device); 77 vendev = vendor << 16 | device; 78 mapped_vendev = board_map_oprom_vendev(vendev); 79 if (vendev != mapped_vendev) 80 debug("Device ID mapped to %#08x\n", mapped_vendev); 81 82 #ifdef CONFIG_X86_OPTION_ROM_ADDR 83 rom_address = CONFIG_X86_OPTION_ROM_ADDR; 84 #else 85 86 if (pciauto_setup_rom(pci_bus_to_hose(PCI_BUS(dev)), dev)) { 87 debug("Cannot find option ROM\n"); 88 return -ENOENT; 89 } 90 91 pci_read_config_dword(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 97 /* Enable expansion ROM address decoding. */ 98 pci_write_config_dword(dev, PCI_ROM_ADDRESS, 99 rom_address | PCI_ROM_ADDRESS_ENABLE); 100 #endif 101 debug("Option ROM address %x\n", rom_address); 102 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 103 104 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 105 le16_to_cpu(rom_header->signature), 106 rom_header->size * 512, le16_to_cpu(rom_header->data)); 107 108 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 109 printf("Incorrect expansion ROM header signature %04x\n", 110 le16_to_cpu(rom_header->signature)); 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 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method) 234 { 235 struct pci_rom_header *rom, *ram; 236 int vesa_mode = -1; 237 uint class; 238 bool emulate; 239 int ret; 240 241 /* Only execute VGA ROMs */ 242 pci_read_config_dword(dev, PCI_REVISION_ID, &class); 243 if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 244 debug("%s: Class %#x, should be %#x\n", __func__, class, 245 PCI_CLASS_DISPLAY_VGA); 246 return -ENODEV; 247 } 248 class >>= 8; 249 250 if (!should_load_oprom(dev)) 251 return -ENXIO; 252 253 ret = pci_rom_probe(dev, class, &rom); 254 if (ret) 255 return ret; 256 257 ret = pci_rom_load(rom, &ram); 258 if (ret) 259 return ret; 260 261 if (!board_should_run_oprom(dev)) 262 return -ENXIO; 263 264 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 265 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 266 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 267 #endif 268 debug("Selected vesa mode %#x\n", vesa_mode); 269 270 if (exec_method & PCI_ROM_USE_NATIVE) { 271 #ifdef CONFIG_X86 272 emulate = false; 273 #else 274 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 275 printf("BIOS native execution is only available on x86\n"); 276 return -ENOSYS; 277 } 278 emulate = true; 279 #endif 280 } else { 281 #ifdef CONFIG_BIOSEMU 282 emulate = true; 283 #else 284 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 285 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 286 return -ENOSYS; 287 } 288 emulate = false; 289 #endif 290 } 291 292 if (emulate) { 293 #ifdef CONFIG_BIOSEMU 294 BE_VGAInfo *info; 295 296 ret = biosemu_setup(dev, &info); 297 if (ret) 298 return ret; 299 biosemu_set_interrupt_handler(0x15, int15_handler); 300 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true, 301 vesa_mode, &mode_info); 302 if (ret) 303 return ret; 304 #endif 305 } else { 306 #ifdef CONFIG_X86 307 bios_set_interrupt_handler(0x15, int15_handler); 308 309 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 310 &mode_info); 311 #endif 312 } 313 debug("Final vesa mode %#x\n", mode_info.video_mode); 314 315 return 0; 316 } 317