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 u32 vendev; 70 u32 mapped_vendev; 71 u32 rom_address; 72 73 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor); 74 pci_read_config_word(dev, PCI_DEVICE_ID, &device); 75 vendev = vendor << 16 | device; 76 mapped_vendev = board_map_oprom_vendev(vendev); 77 if (vendev != mapped_vendev) 78 debug("Device ID mapped to %#08x\n", mapped_vendev); 79 80 #ifdef CONFIG_X86_OPTION_ROM_ADDR 81 rom_address = CONFIG_X86_OPTION_ROM_ADDR; 82 #else 83 pci_write_config_dword(dev, PCI_ROM_ADDRESS, (u32)PCI_ROM_ADDRESS_MASK); 84 pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address); 85 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 86 debug("%s: rom_address=%x\n", __func__, rom_address); 87 return -ENOENT; 88 } 89 90 /* Enable expansion ROM address decoding. */ 91 pci_write_config_dword(dev, PCI_ROM_ADDRESS, 92 rom_address | PCI_ROM_ADDRESS_ENABLE); 93 #endif 94 debug("Option ROM address %x\n", rom_address); 95 rom_header = (struct pci_rom_header *)rom_address; 96 97 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 98 le32_to_cpu(rom_header->signature), 99 rom_header->size * 512, le32_to_cpu(rom_header->data)); 100 101 if (le32_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 102 printf("Incorrect expansion ROM header signature %04x\n", 103 le32_to_cpu(rom_header->signature)); 104 return -EINVAL; 105 } 106 107 rom_data = (((void *)rom_header) + le32_to_cpu(rom_header->data)); 108 109 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n", 110 rom_data->vendor, rom_data->device); 111 112 /* If the device id is mapped, a mismatch is expected */ 113 if ((vendor != rom_data->vendor || device != rom_data->device) && 114 (vendev == mapped_vendev)) { 115 printf("ID mismatch: vendor ID %04x, device ID %04x\n", 116 rom_data->vendor, rom_data->device); 117 return -EPERM; 118 } 119 120 debug("PCI ROM image, Class Code %04x%02x, Code Type %02x\n", 121 rom_data->class_hi, rom_data->class_lo, rom_data->type); 122 123 if (class != ((rom_data->class_hi << 8) | rom_data->class_lo)) { 124 debug("Class Code mismatch ROM %08x, dev %08x\n", 125 (rom_data->class_hi << 8) | rom_data->class_lo, 126 class); 127 } 128 *hdrp = rom_header; 129 130 return 0; 131 } 132 133 int pci_rom_load(uint16_t class, struct pci_rom_header *rom_header, 134 struct pci_rom_header **ram_headerp) 135 { 136 struct pci_rom_data *rom_data; 137 unsigned int rom_size; 138 unsigned int image_size = 0; 139 void *target; 140 141 do { 142 /* Get next image, until we see an x86 version */ 143 rom_header = (struct pci_rom_header *)((void *)rom_header + 144 image_size); 145 146 rom_data = (struct pci_rom_data *)((void *)rom_header + 147 le32_to_cpu(rom_header->data)); 148 149 image_size = le32_to_cpu(rom_data->ilen) * 512; 150 } while ((rom_data->type != 0) && (rom_data->indicator != 0)); 151 152 if (rom_data->type != 0) 153 return -EACCES; 154 155 rom_size = rom_header->size * 512; 156 157 target = (void *)PCI_VGA_RAM_IMAGE_START; 158 if (target != rom_header) { 159 ulong start = get_timer(0); 160 161 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 162 rom_header, target, rom_size); 163 memcpy(target, rom_header, rom_size); 164 if (memcmp(target, rom_header, rom_size)) { 165 printf("VGA ROM copy failed\n"); 166 return -EFAULT; 167 } 168 debug("Copy took %lums\n", get_timer(start)); 169 } 170 *ram_headerp = target; 171 172 return 0; 173 } 174 175 static struct vbe_mode_info mode_info; 176 177 int vbe_get_video_info(struct graphic_device *gdev) 178 { 179 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 180 struct vesa_mode_info *vesa = &mode_info.vesa; 181 182 gdev->winSizeX = vesa->x_resolution; 183 gdev->winSizeY = vesa->y_resolution; 184 185 gdev->plnSizeX = vesa->x_resolution; 186 gdev->plnSizeY = vesa->y_resolution; 187 188 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 189 190 switch (vesa->bits_per_pixel) { 191 case 24: 192 gdev->gdfIndex = GDF_32BIT_X888RGB; 193 break; 194 case 16: 195 gdev->gdfIndex = GDF_16BIT_565RGB; 196 break; 197 default: 198 gdev->gdfIndex = GDF__8BIT_INDEX; 199 break; 200 } 201 202 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 203 gdev->pciBase = vesa->phys_base_ptr; 204 205 gdev->frameAdrs = vesa->phys_base_ptr; 206 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 207 208 gdev->vprBase = vesa->phys_base_ptr; 209 gdev->cprBase = vesa->phys_base_ptr; 210 211 return gdev->winSizeX ? 0 : -ENOSYS; 212 #else 213 return -ENOSYS; 214 #endif 215 } 216 217 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), bool emulate) 218 { 219 struct pci_rom_header *rom, *ram; 220 int vesa_mode = -1; 221 uint16_t class; 222 int ret; 223 224 /* Only execute VGA ROMs */ 225 pci_read_config_word(dev, PCI_CLASS_DEVICE, &class); 226 if ((class ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 227 debug("%s: Class %#x, should be %#x\n", __func__, class, 228 PCI_CLASS_DISPLAY_VGA); 229 return -ENODEV; 230 } 231 232 if (!should_load_oprom(dev)) 233 return -ENXIO; 234 235 ret = pci_rom_probe(dev, class, &rom); 236 if (ret) 237 return ret; 238 239 ret = pci_rom_load(class, rom, &ram); 240 if (ret) 241 return ret; 242 243 if (!board_should_run_oprom(dev)) 244 return -ENXIO; 245 246 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 247 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 248 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 249 #endif 250 debug("Selected vesa mode %#x\n", vesa_mode); 251 if (emulate) { 252 #ifdef CONFIG_BIOSEMU 253 BE_VGAInfo *info; 254 255 ret = biosemu_setup(dev, &info); 256 if (ret) 257 return ret; 258 biosemu_set_interrupt_handler(0x15, int15_handler); 259 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true, 260 vesa_mode, &mode_info); 261 if (ret) 262 return ret; 263 #else 264 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 265 return -ENOSYS; 266 #endif 267 } else { 268 #ifdef CONFIG_X86 269 bios_set_interrupt_handler(0x15, int15_handler); 270 271 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 272 &mode_info); 273 #else 274 printf("BIOS native execution is only available on x86\n"); 275 return -ENOSYS; 276 #endif 277 } 278 debug("Final vesa mode %#x\n", mode_info.video_mode); 279 280 return 0; 281 } 282