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_fb.h> 35 #include <linux/screen_info.h> 36 37 __weak bool board_should_run_oprom(struct udevice *dev) 38 { 39 return true; 40 } 41 42 static bool should_load_oprom(struct udevice *dev) 43 { 44 if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM)) 45 return 1; 46 if (board_should_run_oprom(dev)) 47 return 1; 48 49 return 0; 50 } 51 52 __weak uint32_t board_map_oprom_vendev(uint32_t vendev) 53 { 54 return vendev; 55 } 56 57 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp) 58 { 59 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 60 struct pci_rom_header *rom_header; 61 struct pci_rom_data *rom_data; 62 u16 rom_vendor, rom_device; 63 u32 rom_class; 64 u32 vendev; 65 u32 mapped_vendev; 66 u32 rom_address; 67 68 vendev = pplat->vendor << 16 | pplat->device; 69 mapped_vendev = board_map_oprom_vendev(vendev); 70 if (vendev != mapped_vendev) 71 debug("Device ID mapped to %#08x\n", mapped_vendev); 72 73 #ifdef CONFIG_VGA_BIOS_ADDR 74 rom_address = CONFIG_VGA_BIOS_ADDR; 75 #else 76 77 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address); 78 if (rom_address == 0x00000000 || rom_address == 0xffffffff) { 79 debug("%s: rom_address=%x\n", __func__, rom_address); 80 return -ENOENT; 81 } 82 83 /* Enable expansion ROM address decoding. */ 84 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, 85 rom_address | PCI_ROM_ADDRESS_ENABLE); 86 #endif 87 debug("Option ROM address %x\n", rom_address); 88 rom_header = (struct pci_rom_header *)(unsigned long)rom_address; 89 90 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n", 91 le16_to_cpu(rom_header->signature), 92 rom_header->size * 512, le16_to_cpu(rom_header->data)); 93 94 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) { 95 printf("Incorrect expansion ROM header signature %04x\n", 96 le16_to_cpu(rom_header->signature)); 97 #ifndef CONFIG_VGA_BIOS_ADDR 98 /* Disable expansion ROM address decoding */ 99 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address); 100 #endif 101 return -EINVAL; 102 } 103 104 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data)); 105 rom_vendor = le16_to_cpu(rom_data->vendor); 106 rom_device = le16_to_cpu(rom_data->device); 107 108 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n", 109 rom_vendor, rom_device); 110 111 /* If the device id is mapped, a mismatch is expected */ 112 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) && 113 (vendev == mapped_vendev)) { 114 printf("ID mismatch: vendor ID %04x, device ID %04x\n", 115 rom_vendor, rom_device); 116 /* Continue anyway */ 117 } 118 119 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo; 120 debug("PCI ROM image, Class Code %06x, Code Type %02x\n", 121 rom_class, rom_data->type); 122 123 if (pplat->class != rom_class) { 124 debug("Class Code mismatch ROM %06x, dev %06x\n", 125 rom_class, pplat->class); 126 } 127 *hdrp = rom_header; 128 129 return 0; 130 } 131 132 /** 133 * pci_rom_load() - Load a ROM image and return a pointer to it 134 * 135 * @rom_header: Pointer to ROM image 136 * @ram_headerp: Returns a pointer to the image in RAM 137 * @allocedp: Returns true if @ram_headerp was allocated and needs 138 * to be freed 139 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of 140 * the error state. Even if this function returns an error, it may have 141 * allocated memory. 142 */ 143 static int pci_rom_load(struct pci_rom_header *rom_header, 144 struct pci_rom_header **ram_headerp, bool *allocedp) 145 { 146 struct pci_rom_data *rom_data; 147 unsigned int rom_size; 148 unsigned int image_size = 0; 149 void *target; 150 151 *allocedp = false; 152 do { 153 /* Get next image, until we see an x86 version */ 154 rom_header = (struct pci_rom_header *)((void *)rom_header + 155 image_size); 156 157 rom_data = (struct pci_rom_data *)((void *)rom_header + 158 le16_to_cpu(rom_header->data)); 159 160 image_size = le16_to_cpu(rom_data->ilen) * 512; 161 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 162 163 if (rom_data->type != 0) 164 return -EACCES; 165 166 rom_size = rom_header->size * 512; 167 168 #ifdef PCI_VGA_RAM_IMAGE_START 169 target = (void *)PCI_VGA_RAM_IMAGE_START; 170 #else 171 target = (void *)malloc(rom_size); 172 if (!target) 173 return -ENOMEM; 174 *allocedp = true; 175 #endif 176 if (target != rom_header) { 177 ulong start = get_timer(0); 178 179 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 180 rom_header, target, rom_size); 181 memcpy(target, rom_header, rom_size); 182 if (memcmp(target, rom_header, rom_size)) { 183 printf("VGA ROM copy failed\n"); 184 return -EFAULT; 185 } 186 debug("Copy took %lums\n", get_timer(start)); 187 } 188 *ram_headerp = target; 189 190 return 0; 191 } 192 193 struct vbe_mode_info mode_info; 194 195 int vbe_get_video_info(struct graphic_device *gdev) 196 { 197 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 198 struct vesa_mode_info *vesa = &mode_info.vesa; 199 200 gdev->winSizeX = vesa->x_resolution; 201 gdev->winSizeY = vesa->y_resolution; 202 203 gdev->plnSizeX = vesa->x_resolution; 204 gdev->plnSizeY = vesa->y_resolution; 205 206 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 207 208 switch (vesa->bits_per_pixel) { 209 case 32: 210 case 24: 211 gdev->gdfIndex = GDF_32BIT_X888RGB; 212 break; 213 case 16: 214 gdev->gdfIndex = GDF_16BIT_565RGB; 215 break; 216 default: 217 gdev->gdfIndex = GDF__8BIT_INDEX; 218 break; 219 } 220 221 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 222 gdev->pciBase = vesa->phys_base_ptr; 223 224 gdev->frameAdrs = vesa->phys_base_ptr; 225 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 226 227 gdev->vprBase = vesa->phys_base_ptr; 228 gdev->cprBase = vesa->phys_base_ptr; 229 230 return gdev->winSizeX ? 0 : -ENOSYS; 231 #else 232 return -ENOSYS; 233 #endif 234 } 235 236 void setup_video(struct screen_info *screen_info) 237 { 238 struct vesa_mode_info *vesa = &mode_info.vesa; 239 240 /* Sanity test on VESA parameters */ 241 if (!vesa->x_resolution || !vesa->y_resolution) 242 return; 243 244 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 245 246 screen_info->lfb_width = vesa->x_resolution; 247 screen_info->lfb_height = vesa->y_resolution; 248 screen_info->lfb_depth = vesa->bits_per_pixel; 249 screen_info->lfb_linelength = vesa->bytes_per_scanline; 250 screen_info->lfb_base = vesa->phys_base_ptr; 251 screen_info->lfb_size = 252 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 253 65536); 254 screen_info->lfb_size >>= 16; 255 screen_info->red_size = vesa->red_mask_size; 256 screen_info->red_pos = vesa->red_mask_pos; 257 screen_info->green_size = vesa->green_mask_size; 258 screen_info->green_pos = vesa->green_mask_pos; 259 screen_info->blue_size = vesa->blue_mask_size; 260 screen_info->blue_pos = vesa->blue_mask_pos; 261 screen_info->rsvd_size = vesa->reserved_mask_size; 262 screen_info->rsvd_pos = vesa->reserved_mask_pos; 263 } 264 265 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void), 266 int exec_method) 267 { 268 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 269 struct pci_rom_header *rom, *ram = NULL; 270 int vesa_mode = -1; 271 bool emulate, alloced; 272 int ret; 273 274 /* Only execute VGA ROMs */ 275 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 276 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class, 277 PCI_CLASS_DISPLAY_VGA); 278 return -ENODEV; 279 } 280 281 if (!should_load_oprom(dev)) 282 return -ENXIO; 283 284 ret = pci_rom_probe(dev, &rom); 285 if (ret) 286 return ret; 287 288 ret = pci_rom_load(rom, &ram, &alloced); 289 if (ret) 290 goto err; 291 292 if (!board_should_run_oprom(dev)) { 293 ret = -ENXIO; 294 goto err; 295 } 296 297 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 298 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 299 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 300 #endif 301 debug("Selected vesa mode %#x\n", vesa_mode); 302 303 if (exec_method & PCI_ROM_USE_NATIVE) { 304 #ifdef CONFIG_X86 305 emulate = false; 306 #else 307 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 308 printf("BIOS native execution is only available on x86\n"); 309 ret = -ENOSYS; 310 goto err; 311 } 312 emulate = true; 313 #endif 314 } else { 315 #ifdef CONFIG_BIOSEMU 316 emulate = true; 317 #else 318 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 319 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 320 ret = -ENOSYS; 321 goto err; 322 } 323 emulate = false; 324 #endif 325 } 326 327 if (emulate) { 328 #ifdef CONFIG_BIOSEMU 329 BE_VGAInfo *info; 330 331 ret = biosemu_setup(dm_pci_get_bdf(dev), &info); 332 if (ret) 333 goto err; 334 biosemu_set_interrupt_handler(0x15, int15_handler); 335 ret = biosemu_run(dm_pci_get_bdf(dev), (uchar *)ram, 1 << 16, 336 info, true, vesa_mode, &mode_info); 337 if (ret) 338 goto err; 339 #endif 340 } else { 341 #ifdef CONFIG_X86 342 bios_set_interrupt_handler(0x15, int15_handler); 343 344 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 345 &mode_info); 346 #endif 347 } 348 debug("Final vesa mode %#x\n", mode_info.video_mode); 349 ret = 0; 350 351 err: 352 if (alloced) 353 free(ram); 354 return ret; 355 } 356