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