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 <dm.h> 29 #include <errno.h> 30 #include <malloc.h> 31 #include <pci.h> 32 #include <pci_rom.h> 33 #include <vbe.h> 34 #include <video.h> 35 #include <video_fb.h> 36 #include <linux/screen_info.h> 37 38 #ifdef CONFIG_X86 39 #include <asm/acpi_s3.h> 40 DECLARE_GLOBAL_DATA_PTR; 41 #endif 42 43 __weak bool board_should_run_oprom(struct udevice *dev) 44 { 45 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME) 46 if (gd->arch.prev_sleep_state == ACPI_S3) { 47 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN)) 48 return true; 49 else 50 return false; 51 } 52 #endif 53 54 return true; 55 } 56 57 __weak bool board_should_load_oprom(struct udevice *dev) 58 { 59 return true; 60 } 61 62 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 63 { 64 return vendev; 65 } 66 67 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp) 68 { 69 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 70 struct pci_rom_header *rom_header; 71 struct pci_rom_data *rom_data; 72 u16 rom_vendor, rom_device; 73 u32 rom_class; 74 u32 vendev; 75 u32 mapped_vendev; 76 u32 rom_address; 77 78 vendev = pplat->vendor << 16 | pplat->device; 79 mapped_vendev = board_map_oprom_vendev(vendev); 80 if (vendev != mapped_vendev) 81 debug("Device ID mapped to %#08x\n", mapped_vendev); 82 83 #ifdef CONFIG_VGA_BIOS_ADDR 84 rom_address = CONFIG_VGA_BIOS_ADDR; 85 #else 86 87 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address); 88 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 89 debug("%s: rom_address=%x\n", __func__, rom_address); 90 return -ENOENT; 91 } 92 93 /* Enable expansion ROM address decoding. */ 94 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, 95 rom_address | PCI_ROM_ADDRESS_ENABLE); 96 #endif 97 debug("Option ROM address %x\n", rom_address); 98 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 99 100 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 101 le16_to_cpu(rom_header->signature), 102 rom_header->size * 512, le16_to_cpu(rom_header->data)); 103 104 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 105 printf("Incorrect expansion ROM header signature %04x\n", 106 le16_to_cpu(rom_header->signature)); 107 #ifndef CONFIG_VGA_BIOS_ADDR 108 /* Disable expansion ROM address decoding */ 109 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address); 110 #endif 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 ((pplat->vendor != rom_vendor || pplat->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 (pplat->class != rom_class) { 134 debug("Class Code mismatch ROM %06x, dev %06x\n", 135 rom_class, pplat->class); 136 } 137 *hdrp = rom_header; 138 139 return 0; 140 } 141 142 /** 143 * pci_rom_load() - Load a ROM image and return a pointer to it 144 * 145 * @rom_header: Pointer to ROM image 146 * @ram_headerp: Returns a pointer to the image in RAM 147 * @allocedp: Returns true if @ram_headerp was allocated and needs 148 * to be freed 149 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of 150 * the error state. Even if this function returns an error, it may have 151 * allocated memory. 152 */ 153 static int pci_rom_load(struct pci_rom_header *rom_header, 154 struct pci_rom_header **ram_headerp, bool *allocedp) 155 { 156 struct pci_rom_data *rom_data; 157 unsigned int rom_size; 158 unsigned int image_size = 0; 159 void *target; 160 161 *allocedp = false; 162 do { 163 /* Get next image, until we see an x86 version */ 164 rom_header = (struct pci_rom_header *)((void *)rom_header + 165 image_size); 166 167 rom_data = (struct pci_rom_data *)((void *)rom_header + 168 le16_to_cpu(rom_header->data)); 169 170 image_size = le16_to_cpu(rom_data->ilen) * 512; 171 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 172 173 if (rom_data->type != 0) 174 return -EACCES; 175 176 rom_size = rom_header->size * 512; 177 178 #ifdef PCI_VGA_RAM_IMAGE_START 179 target = (void *)PCI_VGA_RAM_IMAGE_START; 180 #else 181 target = (void *)malloc(rom_size); 182 if (!target) 183 return -ENOMEM; 184 *allocedp = true; 185 #endif 186 if (target != rom_header) { 187 ulong start = get_timer(0); 188 189 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 190 rom_header, target, rom_size); 191 memcpy(target, rom_header, rom_size); 192 if (memcmp(target, rom_header, rom_size)) { 193 printf("VGA ROM copy failed\n"); 194 return -EFAULT; 195 } 196 debug("Copy took %lums\n", get_timer(start)); 197 } 198 *ram_headerp = target; 199 200 return 0; 201 } 202 203 struct vbe_mode_info mode_info; 204 205 void setup_video(struct screen_info *screen_info) 206 { 207 struct vesa_mode_info *vesa = &mode_info.vesa; 208 209 /* Sanity test on VESA parameters */ 210 if (!vesa->x_resolution || !vesa->y_resolution) 211 return; 212 213 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 214 215 screen_info->lfb_width = vesa->x_resolution; 216 screen_info->lfb_height = vesa->y_resolution; 217 screen_info->lfb_depth = vesa->bits_per_pixel; 218 screen_info->lfb_linelength = vesa->bytes_per_scanline; 219 screen_info->lfb_base = vesa->phys_base_ptr; 220 screen_info->lfb_size = 221 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 222 65536); 223 screen_info->lfb_size >>= 16; 224 screen_info->red_size = vesa->red_mask_size; 225 screen_info->red_pos = vesa->red_mask_pos; 226 screen_info->green_size = vesa->green_mask_size; 227 screen_info->green_pos = vesa->green_mask_pos; 228 screen_info->blue_size = vesa->blue_mask_size; 229 screen_info->blue_pos = vesa->blue_mask_pos; 230 screen_info->rsvd_size = vesa->reserved_mask_size; 231 screen_info->rsvd_pos = vesa->reserved_mask_pos; 232 } 233 234 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void), 235 int exec_method) 236 { 237 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 238 struct pci_rom_header *rom = NULL, *ram = NULL; 239 int vesa_mode = -1; 240 bool emulate, alloced; 241 int ret; 242 243 /* Only execute VGA ROMs */ 244 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 245 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class, 246 PCI_CLASS_DISPLAY_VGA); 247 return -ENODEV; 248 } 249 250 if (!board_should_load_oprom(dev)) 251 return -ENXIO; 252 253 ret = pci_rom_probe(dev, &rom); 254 if (ret) 255 return ret; 256 257 ret = pci_rom_load(rom, &ram, &alloced); 258 if (ret) 259 goto err; 260 261 if (!board_should_run_oprom(dev)) { 262 ret = -ENXIO; 263 goto err; 264 } 265 266 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 267 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 268 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 269 #endif 270 debug("Selected vesa mode %#x\n", vesa_mode); 271 272 if (exec_method & PCI_ROM_USE_NATIVE) { 273 #ifdef CONFIG_X86 274 emulate = false; 275 #else 276 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 277 printf("BIOS native execution is only available on x86\n"); 278 ret = -ENOSYS; 279 goto err; 280 } 281 emulate = true; 282 #endif 283 } else { 284 #ifdef CONFIG_BIOSEMU 285 emulate = true; 286 #else 287 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 288 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 289 ret = -ENOSYS; 290 goto err; 291 } 292 emulate = false; 293 #endif 294 } 295 296 if (emulate) { 297 #ifdef CONFIG_BIOSEMU 298 BE_VGAInfo *info; 299 300 ret = biosemu_setup(dev, &info); 301 if (ret) 302 goto err; 303 biosemu_set_interrupt_handler(0x15, int15_handler); 304 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, 305 true, vesa_mode, &mode_info); 306 if (ret) 307 goto err; 308 #endif 309 } else { 310 #if defined(CONFIG_X86) && CONFIG_IS_ENABLED(X86_32BIT_INIT) 311 bios_set_interrupt_handler(0x15, int15_handler); 312 313 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 314 &mode_info); 315 #endif 316 } 317 debug("Final vesa mode %#x\n", mode_info.video_mode); 318 ret = 0; 319 320 err: 321 if (alloced) 322 free(ram); 323 return ret; 324 } 325 326 #ifdef CONFIG_DM_VIDEO 327 int vbe_setup_video_priv(struct vesa_mode_info *vesa, 328 struct video_priv *uc_priv, 329 struct video_uc_platdata *plat) 330 { 331 if (!vesa->x_resolution) 332 return -ENXIO; 333 uc_priv->xsize = vesa->x_resolution; 334 uc_priv->ysize = vesa->y_resolution; 335 switch (vesa->bits_per_pixel) { 336 case 32: 337 case 24: 338 uc_priv->bpix = VIDEO_BPP32; 339 break; 340 case 16: 341 uc_priv->bpix = VIDEO_BPP16; 342 break; 343 default: 344 return -EPROTONOSUPPORT; 345 } 346 plat->base = vesa->phys_base_ptr; 347 plat->size = vesa->bytes_per_scanline * vesa->y_resolution; 348 349 return 0; 350 } 351 352 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void)) 353 { 354 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 355 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 356 int ret; 357 358 printf("Video: "); 359 360 /* If we are running from EFI or coreboot, this can't work */ 361 if (!ll_boot_init()) { 362 printf("Not available (previous bootloader prevents it)\n"); 363 return -EPERM; 364 } 365 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display"); 366 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE | 367 PCI_ROM_ALLOW_FALLBACK); 368 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD); 369 if (ret) { 370 debug("failed to run video BIOS: %d\n", ret); 371 return ret; 372 } 373 374 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat); 375 if (ret) { 376 debug("No video mode configured\n"); 377 return ret; 378 } 379 380 printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize, 381 mode_info.vesa.bits_per_pixel); 382 383 return 0; 384 } 385 #endif 386