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 vendev; 71 u32 mapped_vendev; 72 u32 rom_address; 73 74 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor); 75 pci_read_config_word(dev, PCI_DEVICE_ID, &device); 76 vendev = vendor << 16 | device; 77 mapped_vendev = board_map_oprom_vendev(vendev); 78 if (vendev != mapped_vendev) 79 debug("Device ID mapped to %#08x\n", mapped_vendev); 80 81 #ifdef CONFIG_X86_OPTION_ROM_ADDR 82 rom_address = CONFIG_X86_OPTION_ROM_ADDR; 83 #else 84 85 if (pciauto_setup_rom(pci_bus_to_hose(PCI_BUS(dev)), dev)) { 86 debug("Cannot find option ROM\n"); 87 return -ENOENT; 88 } 89 90 pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address); 91 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 92 debug("%s: rom_address=%x\n", __func__, rom_address); 93 return -ENOENT; 94 } 95 96 /* Enable expansion ROM address decoding. */ 97 pci_write_config_dword(dev, PCI_ROM_ADDRESS, 98 rom_address | PCI_ROM_ADDRESS_ENABLE); 99 #endif 100 debug("Option ROM address %x\n", rom_address); 101 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 102 103 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 104 le16_to_cpu(rom_header->signature), 105 rom_header->size * 512, le16_to_cpu(rom_header->data)); 106 107 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 108 printf("Incorrect expansion ROM header signature %04x\n", 109 le16_to_cpu(rom_header->signature)); 110 return -EINVAL; 111 } 112 113 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data)); 114 rom_vendor = le16_to_cpu(rom_data->vendor); 115 rom_device = le16_to_cpu(rom_data->device); 116 117 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n", 118 rom_vendor, rom_device); 119 120 /* If the device id is mapped, a mismatch is expected */ 121 if ((vendor != rom_vendor || device != rom_device) && 122 (vendev == mapped_vendev)) { 123 printf("ID mismatch: vendor ID %04x, device ID %04x\n", 124 rom_vendor, rom_device); 125 /* Continue anyway */ 126 } 127 128 debug("PCI ROM image, Class Code %04x%02x, Code Type %02x\n", 129 rom_data->class_hi, rom_data->class_lo, rom_data->type); 130 131 if (class != ((rom_data->class_hi << 8) | rom_data->class_lo)) { 132 debug("Class Code mismatch ROM %08x, dev %08x\n", 133 (rom_data->class_hi << 8) | rom_data->class_lo, 134 class); 135 } 136 *hdrp = rom_header; 137 138 return 0; 139 } 140 141 int pci_rom_load(uint16_t class, struct pci_rom_header *rom_header, 142 struct pci_rom_header **ram_headerp) 143 { 144 struct pci_rom_data *rom_data; 145 unsigned int rom_size; 146 unsigned int image_size = 0; 147 void *target; 148 149 do { 150 /* Get next image, until we see an x86 version */ 151 rom_header = (struct pci_rom_header *)((void *)rom_header + 152 image_size); 153 154 rom_data = (struct pci_rom_data *)((void *)rom_header + 155 le16_to_cpu(rom_header->data)); 156 157 image_size = le16_to_cpu(rom_data->ilen) * 512; 158 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 159 160 if (rom_data->type != 0) 161 return -EACCES; 162 163 rom_size = rom_header->size * 512; 164 165 #ifdef PCI_VGA_RAM_IMAGE_START 166 target = (void *)PCI_VGA_RAM_IMAGE_START; 167 #else 168 target = (void *)malloc(rom_size); 169 if (!target) 170 return -ENOMEM; 171 #endif 172 if (target != rom_header) { 173 ulong start = get_timer(0); 174 175 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 176 rom_header, target, rom_size); 177 memcpy(target, rom_header, rom_size); 178 if (memcmp(target, rom_header, rom_size)) { 179 printf("VGA ROM copy failed\n"); 180 return -EFAULT; 181 } 182 debug("Copy took %lums\n", get_timer(start)); 183 } 184 *ram_headerp = target; 185 186 return 0; 187 } 188 189 static struct vbe_mode_info mode_info; 190 191 int vbe_get_video_info(struct graphic_device *gdev) 192 { 193 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 194 struct vesa_mode_info *vesa = &mode_info.vesa; 195 196 gdev->winSizeX = vesa->x_resolution; 197 gdev->winSizeY = vesa->y_resolution; 198 199 gdev->plnSizeX = vesa->x_resolution; 200 gdev->plnSizeY = vesa->y_resolution; 201 202 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 203 204 switch (vesa->bits_per_pixel) { 205 case 24: 206 gdev->gdfIndex = GDF_32BIT_X888RGB; 207 break; 208 case 16: 209 gdev->gdfIndex = GDF_16BIT_565RGB; 210 break; 211 default: 212 gdev->gdfIndex = GDF__8BIT_INDEX; 213 break; 214 } 215 216 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 217 gdev->pciBase = vesa->phys_base_ptr; 218 219 gdev->frameAdrs = vesa->phys_base_ptr; 220 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 221 222 gdev->vprBase = vesa->phys_base_ptr; 223 gdev->cprBase = vesa->phys_base_ptr; 224 225 return gdev->winSizeX ? 0 : -ENOSYS; 226 #else 227 return -ENOSYS; 228 #endif 229 } 230 231 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method) 232 { 233 struct pci_rom_header *rom, *ram; 234 int vesa_mode = -1; 235 uint16_t class; 236 bool emulate; 237 int ret; 238 239 /* Only execute VGA ROMs */ 240 pci_read_config_word(dev, PCI_CLASS_DEVICE, &class); 241 if ((class ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 242 debug("%s: Class %#x, should be %#x\n", __func__, class, 243 PCI_CLASS_DISPLAY_VGA); 244 return -ENODEV; 245 } 246 247 if (!should_load_oprom(dev)) 248 return -ENXIO; 249 250 ret = pci_rom_probe(dev, class, &rom); 251 if (ret) 252 return ret; 253 254 ret = pci_rom_load(class, rom, &ram); 255 if (ret) 256 return ret; 257 258 if (!board_should_run_oprom(dev)) 259 return -ENXIO; 260 261 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 262 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 263 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 264 #endif 265 debug("Selected vesa mode %#x\n", vesa_mode); 266 267 if (exec_method & PCI_ROM_USE_NATIVE) { 268 #ifdef CONFIG_X86 269 emulate = false; 270 #else 271 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 272 printf("BIOS native execution is only available on x86\n"); 273 return -ENOSYS; 274 } 275 emulate = true; 276 #endif 277 } else { 278 #ifdef CONFIG_BIOSEMU 279 emulate = true; 280 #else 281 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 282 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 283 return -ENOSYS; 284 } 285 emulate = false; 286 #endif 287 } 288 289 if (emulate) { 290 #ifdef CONFIG_BIOSEMU 291 BE_VGAInfo *info; 292 293 ret = biosemu_setup(dev, &info); 294 if (ret) 295 return ret; 296 biosemu_set_interrupt_handler(0x15, int15_handler); 297 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true, 298 vesa_mode, &mode_info); 299 if (ret) 300 return ret; 301 #endif 302 } else { 303 #ifdef CONFIG_X86 304 bios_set_interrupt_handler(0x15, int15_handler); 305 306 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 307 &mode_info); 308 #endif 309 } 310 debug("Final vesa mode %#x\n", mode_info.video_mode); 311 312 return 0; 313 } 314