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 __weak bool board_should_run_oprom(struct udevice *dev) 39 { 40 return true; 41 } 42 43 __weak bool board_should_load_oprom(struct udevice *dev) 44 { 45 return true; 46 } 47 48 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 49 { 50 return vendev; 51 } 52 53 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp) 54 { 55 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 56 struct pci_rom_header *rom_header; 57 struct pci_rom_data *rom_data; 58 u16 rom_vendor, rom_device; 59 u32 rom_class; 60 u32 vendev; 61 u32 mapped_vendev; 62 u32 rom_address; 63 64 vendev = pplat->vendor << 16 | pplat->device; 65 mapped_vendev = board_map_oprom_vendev(vendev); 66 if (vendev != mapped_vendev) 67 debug("Device ID mapped to %#08x\n", mapped_vendev); 68 69 #ifdef CONFIG_VGA_BIOS_ADDR 70 rom_address = CONFIG_VGA_BIOS_ADDR; 71 #else 72 73 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address); 74 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 75 debug("%s: rom_address=%x\n", __func__, rom_address); 76 return -ENOENT; 77 } 78 79 /* Enable expansion ROM address decoding. */ 80 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, 81 rom_address | PCI_ROM_ADDRESS_ENABLE); 82 #endif 83 debug("Option ROM address %x\n", rom_address); 84 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 85 86 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 87 le16_to_cpu(rom_header->signature), 88 rom_header->size * 512, le16_to_cpu(rom_header->data)); 89 90 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 91 printf("Incorrect expansion ROM header signature %04x\n", 92 le16_to_cpu(rom_header->signature)); 93 #ifndef CONFIG_VGA_BIOS_ADDR 94 /* Disable expansion ROM address decoding */ 95 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address); 96 #endif 97 return -EINVAL; 98 } 99 100 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data)); 101 rom_vendor = le16_to_cpu(rom_data->vendor); 102 rom_device = le16_to_cpu(rom_data->device); 103 104 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n", 105 rom_vendor, rom_device); 106 107 /* If the device id is mapped, a mismatch is expected */ 108 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) && 109 (vendev == mapped_vendev)) { 110 printf("ID mismatch: vendor ID %04x, device ID %04x\n", 111 rom_vendor, rom_device); 112 /* Continue anyway */ 113 } 114 115 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo; 116 debug("PCI ROM image, Class Code %06x, Code Type %02x\n", 117 rom_class, rom_data->type); 118 119 if (pplat->class != rom_class) { 120 debug("Class Code mismatch ROM %06x, dev %06x\n", 121 rom_class, pplat->class); 122 } 123 *hdrp = rom_header; 124 125 return 0; 126 } 127 128 /** 129 * pci_rom_load() - Load a ROM image and return a pointer to it 130 * 131 * @rom_header: Pointer to ROM image 132 * @ram_headerp: Returns a pointer to the image in RAM 133 * @allocedp: Returns true if @ram_headerp was allocated and needs 134 * to be freed 135 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of 136 * the error state. Even if this function returns an error, it may have 137 * allocated memory. 138 */ 139 static int pci_rom_load(struct pci_rom_header *rom_header, 140 struct pci_rom_header **ram_headerp, bool *allocedp) 141 { 142 struct pci_rom_data *rom_data; 143 unsigned int rom_size; 144 unsigned int image_size = 0; 145 void *target; 146 147 *allocedp = false; 148 do { 149 /* Get next image, until we see an x86 version */ 150 rom_header = (struct pci_rom_header *)((void *)rom_header + 151 image_size); 152 153 rom_data = (struct pci_rom_data *)((void *)rom_header + 154 le16_to_cpu(rom_header->data)); 155 156 image_size = le16_to_cpu(rom_data->ilen) * 512; 157 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 158 159 if (rom_data->type != 0) 160 return -EACCES; 161 162 rom_size = rom_header->size * 512; 163 164 #ifdef PCI_VGA_RAM_IMAGE_START 165 target = (void *)PCI_VGA_RAM_IMAGE_START; 166 #else 167 target = (void *)malloc(rom_size); 168 if (!target) 169 return -ENOMEM; 170 *allocedp = true; 171 #endif 172 if (target != rom_header) { 173 ulong start = get_timer(0); 174 175 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 176 rom_header, target, rom_size); 177 memcpy(target, rom_header, rom_size); 178 if (memcmp(target, rom_header, rom_size)) { 179 printf("VGA ROM copy failed\n"); 180 return -EFAULT; 181 } 182 debug("Copy took %lums\n", get_timer(start)); 183 } 184 *ram_headerp = target; 185 186 return 0; 187 } 188 189 struct vbe_mode_info mode_info; 190 191 int vbe_get_video_info(struct graphic_device *gdev) 192 { 193 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 194 struct vesa_mode_info *vesa = &mode_info.vesa; 195 196 gdev->winSizeX = vesa->x_resolution; 197 gdev->winSizeY = vesa->y_resolution; 198 199 gdev->plnSizeX = vesa->x_resolution; 200 gdev->plnSizeY = vesa->y_resolution; 201 202 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 203 204 switch (vesa->bits_per_pixel) { 205 case 32: 206 case 24: 207 gdev->gdfIndex = GDF_32BIT_X888RGB; 208 break; 209 case 16: 210 gdev->gdfIndex = GDF_16BIT_565RGB; 211 break; 212 default: 213 gdev->gdfIndex = GDF__8BIT_INDEX; 214 break; 215 } 216 217 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 218 gdev->pciBase = vesa->phys_base_ptr; 219 220 gdev->frameAdrs = vesa->phys_base_ptr; 221 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 222 223 gdev->vprBase = vesa->phys_base_ptr; 224 gdev->cprBase = vesa->phys_base_ptr; 225 226 return gdev->winSizeX ? 0 : -ENOSYS; 227 #else 228 return -ENOSYS; 229 #endif 230 } 231 232 void setup_video(struct screen_info *screen_info) 233 { 234 struct vesa_mode_info *vesa = &mode_info.vesa; 235 236 /* Sanity test on VESA parameters */ 237 if (!vesa->x_resolution || !vesa->y_resolution) 238 return; 239 240 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 241 242 screen_info->lfb_width = vesa->x_resolution; 243 screen_info->lfb_height = vesa->y_resolution; 244 screen_info->lfb_depth = vesa->bits_per_pixel; 245 screen_info->lfb_linelength = vesa->bytes_per_scanline; 246 screen_info->lfb_base = vesa->phys_base_ptr; 247 screen_info->lfb_size = 248 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 249 65536); 250 screen_info->lfb_size >>= 16; 251 screen_info->red_size = vesa->red_mask_size; 252 screen_info->red_pos = vesa->red_mask_pos; 253 screen_info->green_size = vesa->green_mask_size; 254 screen_info->green_pos = vesa->green_mask_pos; 255 screen_info->blue_size = vesa->blue_mask_size; 256 screen_info->blue_pos = vesa->blue_mask_pos; 257 screen_info->rsvd_size = vesa->reserved_mask_size; 258 screen_info->rsvd_pos = vesa->reserved_mask_pos; 259 } 260 261 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void), 262 int exec_method) 263 { 264 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 265 struct pci_rom_header *rom = NULL, *ram = NULL; 266 int vesa_mode = -1; 267 bool emulate, alloced; 268 int ret; 269 270 /* Only execute VGA ROMs */ 271 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 272 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class, 273 PCI_CLASS_DISPLAY_VGA); 274 return -ENODEV; 275 } 276 277 if (!board_should_load_oprom(dev)) 278 return -ENXIO; 279 280 ret = pci_rom_probe(dev, &rom); 281 if (ret) 282 return ret; 283 284 ret = pci_rom_load(rom, &ram, &alloced); 285 if (ret) 286 goto err; 287 288 if (!board_should_run_oprom(dev)) { 289 ret = -ENXIO; 290 goto err; 291 } 292 293 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 294 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 295 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 296 #endif 297 debug("Selected vesa mode %#x\n", vesa_mode); 298 299 if (exec_method & PCI_ROM_USE_NATIVE) { 300 #ifdef CONFIG_X86 301 emulate = false; 302 #else 303 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 304 printf("BIOS native execution is only available on x86\n"); 305 ret = -ENOSYS; 306 goto err; 307 } 308 emulate = true; 309 #endif 310 } else { 311 #ifdef CONFIG_BIOSEMU 312 emulate = true; 313 #else 314 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 315 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 316 ret = -ENOSYS; 317 goto err; 318 } 319 emulate = false; 320 #endif 321 } 322 323 if (emulate) { 324 #ifdef CONFIG_BIOSEMU 325 BE_VGAInfo *info; 326 327 ret = biosemu_setup(dev, &info); 328 if (ret) 329 goto err; 330 biosemu_set_interrupt_handler(0x15, int15_handler); 331 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, 332 true, vesa_mode, &mode_info); 333 if (ret) 334 goto err; 335 #endif 336 } else { 337 #if defined(CONFIG_X86) && CONFIG_IS_ENABLED(X86_32BIT_INIT) 338 bios_set_interrupt_handler(0x15, int15_handler); 339 340 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 341 &mode_info); 342 #endif 343 } 344 debug("Final vesa mode %#x\n", mode_info.video_mode); 345 ret = 0; 346 347 err: 348 if (alloced) 349 free(ram); 350 return ret; 351 } 352 353 #ifdef CONFIG_DM_VIDEO 354 int vbe_setup_video_priv(struct vesa_mode_info *vesa, 355 struct video_priv *uc_priv, 356 struct video_uc_platdata *plat) 357 { 358 if (!vesa->x_resolution) 359 return -ENXIO; 360 uc_priv->xsize = vesa->x_resolution; 361 uc_priv->ysize = vesa->y_resolution; 362 switch (vesa->bits_per_pixel) { 363 case 32: 364 case 24: 365 uc_priv->bpix = VIDEO_BPP32; 366 break; 367 case 16: 368 uc_priv->bpix = VIDEO_BPP16; 369 break; 370 default: 371 return -EPROTONOSUPPORT; 372 } 373 plat->base = vesa->phys_base_ptr; 374 plat->size = vesa->bytes_per_scanline * vesa->y_resolution; 375 376 return 0; 377 } 378 379 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void)) 380 { 381 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 382 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 383 int ret; 384 385 printf("Video: "); 386 387 /* If we are running from EFI or coreboot, this can't work */ 388 if (!ll_boot_init()) { 389 printf("Not available (previous bootloader prevents it)\n"); 390 return -EPERM; 391 } 392 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display"); 393 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE | 394 PCI_ROM_ALLOW_FALLBACK); 395 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD); 396 if (ret) { 397 debug("failed to run video BIOS: %d\n", ret); 398 return ret; 399 } 400 401 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat); 402 if (ret) { 403 debug("No video mode configured\n"); 404 return ret; 405 } 406 407 printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize, 408 mode_info.vesa.bits_per_pixel); 409 410 return 0; 411 } 412 #endif 413