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 __weak bool board_should_run_oprom(pci_dev_t dev) 37 { 38 return true; 39 } 40 41 static bool should_load_oprom(pci_dev_t dev) 42 { 43 if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM)) 44 return 1; 45 if (board_should_run_oprom(dev)) 46 return 1; 47 48 return 0; 49 } 50 51 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 52 { 53 return vendev; 54 } 55 56 static int pci_rom_probe(pci_dev_t dev, uint class, 57 struct pci_rom_header **hdrp) 58 { 59 struct pci_rom_header *rom_header; 60 struct pci_rom_data *rom_data; 61 u16 vendor, device; 62 u16 rom_vendor, rom_device; 63 u32 rom_class; 64 u32 vendev; 65 u32 mapped_vendev; 66 u32 rom_address; 67 68 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor); 69 pci_read_config_word(dev, PCI_DEVICE_ID, &device); 70 vendev = vendor << 16 | device; 71 mapped_vendev = board_map_oprom_vendev(vendev); 72 if (vendev != mapped_vendev) 73 debug("Device ID mapped to %#08x\n", mapped_vendev); 74 75 #ifdef CONFIG_VGA_BIOS_ADDR 76 rom_address = CONFIG_VGA_BIOS_ADDR; 77 #else 78 79 pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address); 80 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 81 debug("%s: rom_address=%x\n", __func__, rom_address); 82 return -ENOENT; 83 } 84 85 /* Enable expansion ROM address decoding. */ 86 pci_write_config_dword(dev, PCI_ROM_ADDRESS, 87 rom_address | PCI_ROM_ADDRESS_ENABLE); 88 #endif 89 debug("Option ROM address %x\n", rom_address); 90 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 91 92 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 93 le16_to_cpu(rom_header->signature), 94 rom_header->size * 512, le16_to_cpu(rom_header->data)); 95 96 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 97 printf("Incorrect expansion ROM header signature %04x\n", 98 le16_to_cpu(rom_header->signature)); 99 #ifndef CONFIG_VGA_BIOS_ADDR 100 /* Disable expansion ROM address decoding */ 101 pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address); 102 #endif 103 return -EINVAL; 104 } 105 106 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data)); 107 rom_vendor = le16_to_cpu(rom_data->vendor); 108 rom_device = le16_to_cpu(rom_data->device); 109 110 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n", 111 rom_vendor, rom_device); 112 113 /* If the device id is mapped, a mismatch is expected */ 114 if ((vendor != rom_vendor || device != rom_device) && 115 (vendev == mapped_vendev)) { 116 printf("ID mismatch: vendor ID %04x, device ID %04x\n", 117 rom_vendor, rom_device); 118 /* Continue anyway */ 119 } 120 121 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo; 122 debug("PCI ROM image, Class Code %06x, Code Type %02x\n", 123 rom_class, rom_data->type); 124 125 if (class != rom_class) { 126 debug("Class Code mismatch ROM %06x, dev %06x\n", 127 rom_class, class); 128 } 129 *hdrp = rom_header; 130 131 return 0; 132 } 133 134 int pci_rom_load(struct pci_rom_header *rom_header, 135 struct pci_rom_header **ram_headerp) 136 { 137 struct pci_rom_data *rom_data; 138 unsigned int rom_size; 139 unsigned int image_size = 0; 140 void *target; 141 142 do { 143 /* Get next image, until we see an x86 version */ 144 rom_header = (struct pci_rom_header *)((void *)rom_header + 145 image_size); 146 147 rom_data = (struct pci_rom_data *)((void *)rom_header + 148 le16_to_cpu(rom_header->data)); 149 150 image_size = le16_to_cpu(rom_data->ilen) * 512; 151 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 152 153 if (rom_data->type != 0) 154 return -EACCES; 155 156 rom_size = rom_header->size * 512; 157 158 #ifdef PCI_VGA_RAM_IMAGE_START 159 target = (void *)PCI_VGA_RAM_IMAGE_START; 160 #else 161 target = (void *)malloc(rom_size); 162 if (!target) 163 return -ENOMEM; 164 #endif 165 if (target != rom_header) { 166 ulong start = get_timer(0); 167 168 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 169 rom_header, target, rom_size); 170 memcpy(target, rom_header, rom_size); 171 if (memcmp(target, rom_header, rom_size)) { 172 printf("VGA ROM copy failed\n"); 173 return -EFAULT; 174 } 175 debug("Copy took %lums\n", get_timer(start)); 176 } 177 *ram_headerp = target; 178 179 return 0; 180 } 181 182 struct vbe_mode_info mode_info; 183 184 int vbe_get_video_info(struct graphic_device *gdev) 185 { 186 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 187 struct vesa_mode_info *vesa = &mode_info.vesa; 188 189 gdev->winSizeX = vesa->x_resolution; 190 gdev->winSizeY = vesa->y_resolution; 191 192 gdev->plnSizeX = vesa->x_resolution; 193 gdev->plnSizeY = vesa->y_resolution; 194 195 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 196 197 switch (vesa->bits_per_pixel) { 198 case 32: 199 case 24: 200 gdev->gdfIndex = GDF_32BIT_X888RGB; 201 break; 202 case 16: 203 gdev->gdfIndex = GDF_16BIT_565RGB; 204 break; 205 default: 206 gdev->gdfIndex = GDF__8BIT_INDEX; 207 break; 208 } 209 210 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 211 gdev->pciBase = vesa->phys_base_ptr; 212 213 gdev->frameAdrs = vesa->phys_base_ptr; 214 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 215 216 gdev->vprBase = vesa->phys_base_ptr; 217 gdev->cprBase = vesa->phys_base_ptr; 218 219 return gdev->winSizeX ? 0 : -ENOSYS; 220 #else 221 return -ENOSYS; 222 #endif 223 } 224 225 void setup_video(struct screen_info *screen_info) 226 { 227 struct vesa_mode_info *vesa = &mode_info.vesa; 228 229 /* Sanity test on VESA parameters */ 230 if (!vesa->x_resolution || !vesa->y_resolution) 231 return; 232 233 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 234 235 screen_info->lfb_width = vesa->x_resolution; 236 screen_info->lfb_height = vesa->y_resolution; 237 screen_info->lfb_depth = vesa->bits_per_pixel; 238 screen_info->lfb_linelength = vesa->bytes_per_scanline; 239 screen_info->lfb_base = vesa->phys_base_ptr; 240 screen_info->lfb_size = 241 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 242 65536); 243 screen_info->lfb_size >>= 16; 244 screen_info->red_size = vesa->red_mask_size; 245 screen_info->red_pos = vesa->red_mask_pos; 246 screen_info->green_size = vesa->green_mask_size; 247 screen_info->green_pos = vesa->green_mask_pos; 248 screen_info->blue_size = vesa->blue_mask_size; 249 screen_info->blue_pos = vesa->blue_mask_pos; 250 screen_info->rsvd_size = vesa->reserved_mask_size; 251 screen_info->rsvd_pos = vesa->reserved_mask_pos; 252 } 253 254 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method) 255 { 256 struct pci_rom_header *rom, *ram; 257 int vesa_mode = -1; 258 uint class; 259 bool emulate; 260 int ret; 261 262 /* Only execute VGA ROMs */ 263 pci_read_config_dword(dev, PCI_REVISION_ID, &class); 264 if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 265 debug("%s: Class %#x, should be %#x\n", __func__, class, 266 PCI_CLASS_DISPLAY_VGA); 267 return -ENODEV; 268 } 269 class >>= 8; 270 271 if (!should_load_oprom(dev)) 272 return -ENXIO; 273 274 ret = pci_rom_probe(dev, class, &rom); 275 if (ret) 276 return ret; 277 278 ret = pci_rom_load(rom, &ram); 279 if (ret) 280 return ret; 281 282 if (!board_should_run_oprom(dev)) 283 return -ENXIO; 284 285 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 286 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 287 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 288 #endif 289 debug("Selected vesa mode %#x\n", vesa_mode); 290 291 if (exec_method & PCI_ROM_USE_NATIVE) { 292 #ifdef CONFIG_X86 293 emulate = false; 294 #else 295 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 296 printf("BIOS native execution is only available on x86\n"); 297 return -ENOSYS; 298 } 299 emulate = true; 300 #endif 301 } else { 302 #ifdef CONFIG_BIOSEMU 303 emulate = true; 304 #else 305 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 306 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 307 return -ENOSYS; 308 } 309 emulate = false; 310 #endif 311 } 312 313 if (emulate) { 314 #ifdef CONFIG_BIOSEMU 315 BE_VGAInfo *info; 316 317 ret = biosemu_setup(dev, &info); 318 if (ret) 319 return ret; 320 biosemu_set_interrupt_handler(0x15, int15_handler); 321 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true, 322 vesa_mode, &mode_info); 323 if (ret) 324 return ret; 325 #endif 326 } else { 327 #ifdef CONFIG_X86 328 bios_set_interrupt_handler(0x15, int15_handler); 329 330 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 331 &mode_info); 332 #endif 333 } 334 debug("Final vesa mode %#x\n", mode_info.video_mode); 335 336 return 0; 337 } 338