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