1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2014 Google, Inc 4 * 5 * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c). 6 * 7 * Modifications are: 8 * Copyright (C) 2003-2004 Linux Networx 9 * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) 10 * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com> 11 * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov> 12 * Copyright (C) 2005-2006 Tyan 13 * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) 14 * Copyright (C) 2005-2009 coresystems GmbH 15 * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH) 16 * 17 * PCI Bus Services, see include/linux/pci.h for further explanation. 18 * 19 * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter, 20 * David Mosberger-Tang 21 * 22 * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz> 23 */ 24 25 #include <common.h> 26 #include <bios_emul.h> 27 #include <dm.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.h> 34 #include <video_fb.h> 35 #include <linux/screen_info.h> 36 37 #ifdef CONFIG_X86 38 #include <asm/acpi_s3.h> 39 DECLARE_GLOBAL_DATA_PTR; 40 #endif 41 42 __weak bool board_should_run_oprom(struct udevice *dev) 43 { 44 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME) 45 if (gd->arch.prev_sleep_state == ACPI_S3) { 46 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN)) 47 return true; 48 else 49 return false; 50 } 51 #endif 52 53 return true; 54 } 55 56 __weak bool board_should_load_oprom(struct udevice *dev) 57 { 58 return true; 59 } 60 61 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 62 { 63 return vendev; 64 } 65 66 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp) 67 { 68 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 69 struct pci_rom_header *rom_header; 70 struct pci_rom_data *rom_data; 71 u16 rom_vendor, rom_device; 72 u32 rom_class; 73 u32 vendev; 74 u32 mapped_vendev; 75 u32 rom_address; 76 77 vendev = pplat->vendor << 16 | pplat->device; 78 mapped_vendev = board_map_oprom_vendev(vendev); 79 if (vendev != mapped_vendev) 80 debug("Device ID mapped to %#08x\n", mapped_vendev); 81 82 #ifdef CONFIG_VGA_BIOS_ADDR 83 rom_address = CONFIG_VGA_BIOS_ADDR; 84 #else 85 86 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address); 87 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 88 debug("%s: rom_address=%x\n", __func__, rom_address); 89 return -ENOENT; 90 } 91 92 /* Enable expansion ROM address decoding. */ 93 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, 94 rom_address | PCI_ROM_ADDRESS_ENABLE); 95 #endif 96 debug("Option ROM address %x\n", rom_address); 97 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 98 99 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 100 le16_to_cpu(rom_header->signature), 101 rom_header->size * 512, le16_to_cpu(rom_header->data)); 102 103 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 104 printf("Incorrect expansion ROM header signature %04x\n", 105 le16_to_cpu(rom_header->signature)); 106 #ifndef CONFIG_VGA_BIOS_ADDR 107 /* Disable expansion ROM address decoding */ 108 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address); 109 #endif 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 ((pplat->vendor != rom_vendor || pplat->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 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo; 129 debug("PCI ROM image, Class Code %06x, Code Type %02x\n", 130 rom_class, rom_data->type); 131 132 if (pplat->class != rom_class) { 133 debug("Class Code mismatch ROM %06x, dev %06x\n", 134 rom_class, pplat->class); 135 } 136 *hdrp = rom_header; 137 138 return 0; 139 } 140 141 /** 142 * pci_rom_load() - Load a ROM image and return a pointer to it 143 * 144 * @rom_header: Pointer to ROM image 145 * @ram_headerp: Returns a pointer to the image in RAM 146 * @allocedp: Returns true if @ram_headerp was allocated and needs 147 * to be freed 148 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of 149 * the error state. Even if this function returns an error, it may have 150 * allocated memory. 151 */ 152 static int pci_rom_load(struct pci_rom_header *rom_header, 153 struct pci_rom_header **ram_headerp, bool *allocedp) 154 { 155 struct pci_rom_data *rom_data; 156 unsigned int rom_size; 157 unsigned int image_size = 0; 158 void *target; 159 160 *allocedp = false; 161 do { 162 /* Get next image, until we see an x86 version */ 163 rom_header = (struct pci_rom_header *)((void *)rom_header + 164 image_size); 165 166 rom_data = (struct pci_rom_data *)((void *)rom_header + 167 le16_to_cpu(rom_header->data)); 168 169 image_size = le16_to_cpu(rom_data->ilen) * 512; 170 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 171 172 if (rom_data->type != 0) 173 return -EACCES; 174 175 rom_size = rom_header->size * 512; 176 177 #ifdef PCI_VGA_RAM_IMAGE_START 178 target = (void *)PCI_VGA_RAM_IMAGE_START; 179 #else 180 target = (void *)malloc(rom_size); 181 if (!target) 182 return -ENOMEM; 183 *allocedp = true; 184 #endif 185 if (target != rom_header) { 186 ulong start = get_timer(0); 187 188 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 189 rom_header, target, rom_size); 190 memcpy(target, rom_header, rom_size); 191 if (memcmp(target, rom_header, rom_size)) { 192 printf("VGA ROM copy failed\n"); 193 return -EFAULT; 194 } 195 debug("Copy took %lums\n", get_timer(start)); 196 } 197 *ram_headerp = target; 198 199 return 0; 200 } 201 202 struct vbe_mode_info mode_info; 203 204 void setup_video(struct screen_info *screen_info) 205 { 206 struct vesa_mode_info *vesa = &mode_info.vesa; 207 208 /* Sanity test on VESA parameters */ 209 if (!vesa->x_resolution || !vesa->y_resolution) 210 return; 211 212 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 213 214 screen_info->lfb_width = vesa->x_resolution; 215 screen_info->lfb_height = vesa->y_resolution; 216 screen_info->lfb_depth = vesa->bits_per_pixel; 217 screen_info->lfb_linelength = vesa->bytes_per_scanline; 218 screen_info->lfb_base = vesa->phys_base_ptr; 219 screen_info->lfb_size = 220 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 221 65536); 222 screen_info->lfb_size >>= 16; 223 screen_info->red_size = vesa->red_mask_size; 224 screen_info->red_pos = vesa->red_mask_pos; 225 screen_info->green_size = vesa->green_mask_size; 226 screen_info->green_pos = vesa->green_mask_pos; 227 screen_info->blue_size = vesa->blue_mask_size; 228 screen_info->blue_pos = vesa->blue_mask_pos; 229 screen_info->rsvd_size = vesa->reserved_mask_size; 230 screen_info->rsvd_pos = vesa->reserved_mask_pos; 231 } 232 233 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void), 234 int exec_method) 235 { 236 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 237 struct pci_rom_header *rom = NULL, *ram = NULL; 238 int vesa_mode = -1; 239 bool emulate, alloced; 240 int ret; 241 242 /* Only execute VGA ROMs */ 243 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 244 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class, 245 PCI_CLASS_DISPLAY_VGA); 246 return -ENODEV; 247 } 248 249 if (!board_should_load_oprom(dev)) 250 return -ENXIO; 251 252 ret = pci_rom_probe(dev, &rom); 253 if (ret) 254 return ret; 255 256 ret = pci_rom_load(rom, &ram, &alloced); 257 if (ret) 258 goto err; 259 260 if (!board_should_run_oprom(dev)) { 261 ret = -ENXIO; 262 goto err; 263 } 264 265 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 266 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 267 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 268 #endif 269 debug("Selected vesa mode %#x\n", vesa_mode); 270 271 if (exec_method & PCI_ROM_USE_NATIVE) { 272 #ifdef CONFIG_X86 273 emulate = false; 274 #else 275 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 276 printf("BIOS native execution is only available on x86\n"); 277 ret = -ENOSYS; 278 goto err; 279 } 280 emulate = true; 281 #endif 282 } else { 283 #ifdef CONFIG_BIOSEMU 284 emulate = true; 285 #else 286 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 287 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 288 ret = -ENOSYS; 289 goto err; 290 } 291 emulate = false; 292 #endif 293 } 294 295 if (emulate) { 296 #ifdef CONFIG_BIOSEMU 297 BE_VGAInfo *info; 298 299 ret = biosemu_setup(dev, &info); 300 if (ret) 301 goto err; 302 biosemu_set_interrupt_handler(0x15, int15_handler); 303 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, 304 true, vesa_mode, &mode_info); 305 if (ret) 306 goto err; 307 #endif 308 } else { 309 #if defined(CONFIG_X86) && CONFIG_IS_ENABLED(X86_32BIT_INIT) 310 bios_set_interrupt_handler(0x15, int15_handler); 311 312 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 313 &mode_info); 314 #endif 315 } 316 debug("Final vesa mode %#x\n", mode_info.video_mode); 317 ret = 0; 318 319 err: 320 if (alloced) 321 free(ram); 322 return ret; 323 } 324 325 #ifdef CONFIG_DM_VIDEO 326 int vbe_setup_video_priv(struct vesa_mode_info *vesa, 327 struct video_priv *uc_priv, 328 struct video_uc_platdata *plat) 329 { 330 if (!vesa->x_resolution) 331 return -ENXIO; 332 uc_priv->xsize = vesa->x_resolution; 333 uc_priv->ysize = vesa->y_resolution; 334 switch (vesa->bits_per_pixel) { 335 case 32: 336 case 24: 337 uc_priv->bpix = VIDEO_BPP32; 338 break; 339 case 16: 340 uc_priv->bpix = VIDEO_BPP16; 341 break; 342 default: 343 return -EPROTONOSUPPORT; 344 } 345 plat->base = vesa->phys_base_ptr; 346 plat->size = vesa->bytes_per_scanline * vesa->y_resolution; 347 348 return 0; 349 } 350 351 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void)) 352 { 353 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 354 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 355 int ret; 356 357 /* If we are running from EFI or coreboot, this can't work */ 358 if (!ll_boot_init()) { 359 printf("Not available (previous bootloader prevents it)\n"); 360 return -EPERM; 361 } 362 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display"); 363 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE | 364 PCI_ROM_ALLOW_FALLBACK); 365 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD); 366 if (ret) { 367 debug("failed to run video BIOS: %d\n", ret); 368 return ret; 369 } 370 371 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat); 372 if (ret) { 373 debug("No video mode configured\n"); 374 return ret; 375 } 376 377 printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize, 378 mode_info.vesa.bits_per_pixel); 379 380 return 0; 381 } 382 #endif 383