2 * Copyright (C) 2014 Google, Inc
4 * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
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)
16 * PCI Bus Services, see include/linux/pci.h for further explanation.
18 * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
19 * David Mosberger-Tang
21 * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
23 * SPDX-License-Identifier: GPL-2.0
27 #include <bios_emul.h>
35 #include <linux/screen_info.h>
37 __weak bool board_should_run_oprom(struct udevice *dev)
42 __weak bool board_should_load_oprom(struct udevice *dev)
47 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
52 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
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;
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);
68 #ifdef CONFIG_VGA_BIOS_ADDR
69 rom_address = CONFIG_VGA_BIOS_ADDR;
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);
78 /* Enable expansion ROM address decoding. */
79 dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
80 rom_address | PCI_ROM_ADDRESS_ENABLE);
82 debug("Option ROM address %x\n", rom_address);
83 rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
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));
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);
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);
103 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
104 rom_vendor, rom_device);
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 */
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);
118 if (pplat->class != rom_class) {
119 debug("Class Code mismatch ROM %06x, dev %06x\n",
120 rom_class, pplat->class);
128 * pci_rom_load() - Load a ROM image and return a pointer to it
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
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
138 static int pci_rom_load(struct pci_rom_header *rom_header,
139 struct pci_rom_header **ram_headerp, bool *allocedp)
141 struct pci_rom_data *rom_data;
142 unsigned int rom_size;
143 unsigned int image_size = 0;
148 /* Get next image, until we see an x86 version */
149 rom_header = (struct pci_rom_header *)((void *)rom_header +
152 rom_data = (struct pci_rom_data *)((void *)rom_header +
153 le16_to_cpu(rom_header->data));
155 image_size = le16_to_cpu(rom_data->ilen) * 512;
156 } while ((rom_data->type != 0) && (rom_data->indicator == 0));
158 if (rom_data->type != 0)
161 rom_size = rom_header->size * 512;
163 #ifdef PCI_VGA_RAM_IMAGE_START
164 target = (void *)PCI_VGA_RAM_IMAGE_START;
166 target = (void *)malloc(rom_size);
171 if (target != rom_header) {
172 ulong start = get_timer(0);
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");
181 debug("Copy took %lums\n", get_timer(start));
183 *ram_headerp = target;
188 struct vbe_mode_info mode_info;
190 int vbe_get_video_info(struct graphic_device *gdev)
192 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
193 struct vesa_mode_info *vesa = &mode_info.vesa;
195 gdev->winSizeX = vesa->x_resolution;
196 gdev->winSizeY = vesa->y_resolution;
198 gdev->plnSizeX = vesa->x_resolution;
199 gdev->plnSizeY = vesa->y_resolution;
201 gdev->gdfBytesPP = vesa->bits_per_pixel / 8;
203 switch (vesa->bits_per_pixel) {
206 gdev->gdfIndex = GDF_32BIT_X888RGB;
209 gdev->gdfIndex = GDF_16BIT_565RGB;
212 gdev->gdfIndex = GDF__8BIT_INDEX;
216 gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
217 gdev->pciBase = vesa->phys_base_ptr;
219 gdev->frameAdrs = vesa->phys_base_ptr;
220 gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;
222 gdev->vprBase = vesa->phys_base_ptr;
223 gdev->cprBase = vesa->phys_base_ptr;
225 return gdev->winSizeX ? 0 : -ENOSYS;
231 void setup_video(struct screen_info *screen_info)
233 struct vesa_mode_info *vesa = &mode_info.vesa;
235 /* Sanity test on VESA parameters */
236 if (!vesa->x_resolution || !vesa->y_resolution)
239 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
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,
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;
260 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
263 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
264 struct pci_rom_header *rom = NULL, *ram = NULL;
266 bool emulate, alloced;
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);
276 if (!board_should_load_oprom(dev))
279 ret = pci_rom_probe(dev, &rom);
283 ret = pci_rom_load(rom, &ram, &alloced);
287 if (!board_should_run_oprom(dev)) {
292 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
293 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
294 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
296 debug("Selected vesa mode %#x\n", vesa_mode);
298 if (exec_method & PCI_ROM_USE_NATIVE) {
302 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
303 printf("BIOS native execution is only available on x86\n");
310 #ifdef CONFIG_BIOSEMU
313 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
314 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
323 #ifdef CONFIG_BIOSEMU
326 ret = biosemu_setup(dev, &info);
329 biosemu_set_interrupt_handler(0x15, int15_handler);
330 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
331 true, vesa_mode, &mode_info);
337 bios_set_interrupt_handler(0x15, int15_handler);
339 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
343 debug("Final vesa mode %#x\n", mode_info.video_mode);