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 int pci_rom_load(struct pci_rom_header *rom_header, 133 struct pci_rom_header **ram_headerp) 134 { 135 struct pci_rom_data *rom_data; 136 unsigned int rom_size; 137 unsigned int image_size = 0; 138 void *target; 139 140 do { 141 /* Get next image, until we see an x86 version */ 142 rom_header = (struct pci_rom_header *)((void *)rom_header + 143 image_size); 144 145 rom_data = (struct pci_rom_data *)((void *)rom_header + 146 le16_to_cpu(rom_header->data)); 147 148 image_size = le16_to_cpu(rom_data->ilen) * 512; 149 } while ((rom_data->type != 0) && (rom_data->indicator == 0)); 150 151 if (rom_data->type != 0) 152 return -EACCES; 153 154 rom_size = rom_header->size * 512; 155 156 #ifdef PCI_VGA_RAM_IMAGE_START 157 target = (void *)PCI_VGA_RAM_IMAGE_START; 158 #else 159 target = (void *)malloc(rom_size); 160 if (!target) 161 return -ENOMEM; 162 #endif 163 if (target != rom_header) { 164 ulong start = get_timer(0); 165 166 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n", 167 rom_header, target, rom_size); 168 memcpy(target, rom_header, rom_size); 169 if (memcmp(target, rom_header, rom_size)) { 170 printf("VGA ROM copy failed\n"); 171 return -EFAULT; 172 } 173 debug("Copy took %lums\n", get_timer(start)); 174 } 175 *ram_headerp = target; 176 177 return 0; 178 } 179 180 struct vbe_mode_info mode_info; 181 182 int vbe_get_video_info(struct graphic_device *gdev) 183 { 184 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE 185 struct vesa_mode_info *vesa = &mode_info.vesa; 186 187 gdev->winSizeX = vesa->x_resolution; 188 gdev->winSizeY = vesa->y_resolution; 189 190 gdev->plnSizeX = vesa->x_resolution; 191 gdev->plnSizeY = vesa->y_resolution; 192 193 gdev->gdfBytesPP = vesa->bits_per_pixel / 8; 194 195 switch (vesa->bits_per_pixel) { 196 case 32: 197 case 24: 198 gdev->gdfIndex = GDF_32BIT_X888RGB; 199 break; 200 case 16: 201 gdev->gdfIndex = GDF_16BIT_565RGB; 202 break; 203 default: 204 gdev->gdfIndex = GDF__8BIT_INDEX; 205 break; 206 } 207 208 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS; 209 gdev->pciBase = vesa->phys_base_ptr; 210 211 gdev->frameAdrs = vesa->phys_base_ptr; 212 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution; 213 214 gdev->vprBase = vesa->phys_base_ptr; 215 gdev->cprBase = vesa->phys_base_ptr; 216 217 return gdev->winSizeX ? 0 : -ENOSYS; 218 #else 219 return -ENOSYS; 220 #endif 221 } 222 223 void setup_video(struct screen_info *screen_info) 224 { 225 struct vesa_mode_info *vesa = &mode_info.vesa; 226 227 /* Sanity test on VESA parameters */ 228 if (!vesa->x_resolution || !vesa->y_resolution) 229 return; 230 231 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB; 232 233 screen_info->lfb_width = vesa->x_resolution; 234 screen_info->lfb_height = vesa->y_resolution; 235 screen_info->lfb_depth = vesa->bits_per_pixel; 236 screen_info->lfb_linelength = vesa->bytes_per_scanline; 237 screen_info->lfb_base = vesa->phys_base_ptr; 238 screen_info->lfb_size = 239 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height, 240 65536); 241 screen_info->lfb_size >>= 16; 242 screen_info->red_size = vesa->red_mask_size; 243 screen_info->red_pos = vesa->red_mask_pos; 244 screen_info->green_size = vesa->green_mask_size; 245 screen_info->green_pos = vesa->green_mask_pos; 246 screen_info->blue_size = vesa->blue_mask_size; 247 screen_info->blue_pos = vesa->blue_mask_pos; 248 screen_info->rsvd_size = vesa->reserved_mask_size; 249 screen_info->rsvd_pos = vesa->reserved_mask_pos; 250 } 251 252 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void), 253 int exec_method) 254 { 255 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); 256 struct pci_rom_header *rom, *ram; 257 int vesa_mode = -1; 258 bool emulate; 259 int ret; 260 261 /* Only execute VGA ROMs */ 262 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) { 263 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class, 264 PCI_CLASS_DISPLAY_VGA); 265 return -ENODEV; 266 } 267 268 if (!should_load_oprom(dev)) 269 return -ENXIO; 270 271 ret = pci_rom_probe(dev, &rom); 272 if (ret) 273 return ret; 274 275 ret = pci_rom_load(rom, &ram); 276 if (ret) 277 return ret; 278 279 if (!board_should_run_oprom(dev)) 280 return -ENXIO; 281 282 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \ 283 defined(CONFIG_FRAMEBUFFER_VESA_MODE) 284 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE; 285 #endif 286 debug("Selected vesa mode %#x\n", vesa_mode); 287 288 if (exec_method & PCI_ROM_USE_NATIVE) { 289 #ifdef CONFIG_X86 290 emulate = false; 291 #else 292 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 293 printf("BIOS native execution is only available on x86\n"); 294 return -ENOSYS; 295 } 296 emulate = true; 297 #endif 298 } else { 299 #ifdef CONFIG_BIOSEMU 300 emulate = true; 301 #else 302 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) { 303 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n"); 304 return -ENOSYS; 305 } 306 emulate = false; 307 #endif 308 } 309 310 if (emulate) { 311 #ifdef CONFIG_BIOSEMU 312 BE_VGAInfo *info; 313 314 ret = biosemu_setup(dm_pci_get_bdf(dev), &info); 315 if (ret) 316 return ret; 317 biosemu_set_interrupt_handler(0x15, int15_handler); 318 ret = biosemu_run(dm_pci_get_bdf(dev), (uchar *)ram, 1 << 16, 319 info, true, vesa_mode, &mode_info); 320 if (ret) 321 return ret; 322 #endif 323 } else { 324 #ifdef CONFIG_X86 325 bios_set_interrupt_handler(0x15, int15_handler); 326 327 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode, 328 &mode_info); 329 #endif 330 } 331 debug("Final vesa mode %#x\n", mode_info.video_mode); 332 333 return 0; 334 } 335