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>
36 #include <linux/screen_info.h>
39 #include <asm/acpi_s3.h>
40 DECLARE_GLOBAL_DATA_PTR;
43 __weak bool board_should_run_oprom(struct udevice *dev)
45 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME)
46 if (gd->arch.prev_sleep_state == ACPI_S3) {
47 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN))
57 __weak bool board_should_load_oprom(struct udevice *dev)
62 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
67 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
69 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
70 struct pci_rom_header *rom_header;
71 struct pci_rom_data *rom_data;
72 u16 rom_vendor, rom_device;
78 vendev = pplat->vendor << 16 | pplat->device;
79 mapped_vendev = board_map_oprom_vendev(vendev);
80 if (vendev != mapped_vendev)
81 debug("Device ID mapped to %#08x\n", mapped_vendev);
83 #ifdef CONFIG_VGA_BIOS_ADDR
84 rom_address = CONFIG_VGA_BIOS_ADDR;
87 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
88 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
89 debug("%s: rom_address=%x\n", __func__, rom_address);
93 /* Enable expansion ROM address decoding. */
94 dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
95 rom_address | PCI_ROM_ADDRESS_ENABLE);
97 debug("Option ROM address %x\n", rom_address);
98 rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
100 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
101 le16_to_cpu(rom_header->signature),
102 rom_header->size * 512, le16_to_cpu(rom_header->data));
104 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
105 printf("Incorrect expansion ROM header signature %04x\n",
106 le16_to_cpu(rom_header->signature));
107 #ifndef CONFIG_VGA_BIOS_ADDR
108 /* Disable expansion ROM address decoding */
109 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
114 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
115 rom_vendor = le16_to_cpu(rom_data->vendor);
116 rom_device = le16_to_cpu(rom_data->device);
118 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
119 rom_vendor, rom_device);
121 /* If the device id is mapped, a mismatch is expected */
122 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
123 (vendev == mapped_vendev)) {
124 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
125 rom_vendor, rom_device);
126 /* Continue anyway */
129 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
130 debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
131 rom_class, rom_data->type);
133 if (pplat->class != rom_class) {
134 debug("Class Code mismatch ROM %06x, dev %06x\n",
135 rom_class, pplat->class);
143 * pci_rom_load() - Load a ROM image and return a pointer to it
145 * @rom_header: Pointer to ROM image
146 * @ram_headerp: Returns a pointer to the image in RAM
147 * @allocedp: Returns true if @ram_headerp was allocated and needs
149 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of
150 * the error state. Even if this function returns an error, it may have
153 static int pci_rom_load(struct pci_rom_header *rom_header,
154 struct pci_rom_header **ram_headerp, bool *allocedp)
156 struct pci_rom_data *rom_data;
157 unsigned int rom_size;
158 unsigned int image_size = 0;
163 /* Get next image, until we see an x86 version */
164 rom_header = (struct pci_rom_header *)((void *)rom_header +
167 rom_data = (struct pci_rom_data *)((void *)rom_header +
168 le16_to_cpu(rom_header->data));
170 image_size = le16_to_cpu(rom_data->ilen) * 512;
171 } while ((rom_data->type != 0) && (rom_data->indicator == 0));
173 if (rom_data->type != 0)
176 rom_size = rom_header->size * 512;
178 #ifdef PCI_VGA_RAM_IMAGE_START
179 target = (void *)PCI_VGA_RAM_IMAGE_START;
181 target = (void *)malloc(rom_size);
186 if (target != rom_header) {
187 ulong start = get_timer(0);
189 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
190 rom_header, target, rom_size);
191 memcpy(target, rom_header, rom_size);
192 if (memcmp(target, rom_header, rom_size)) {
193 printf("VGA ROM copy failed\n");
196 debug("Copy took %lums\n", get_timer(start));
198 *ram_headerp = target;
203 struct vbe_mode_info mode_info;
205 void setup_video(struct screen_info *screen_info)
207 struct vesa_mode_info *vesa = &mode_info.vesa;
209 /* Sanity test on VESA parameters */
210 if (!vesa->x_resolution || !vesa->y_resolution)
213 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
215 screen_info->lfb_width = vesa->x_resolution;
216 screen_info->lfb_height = vesa->y_resolution;
217 screen_info->lfb_depth = vesa->bits_per_pixel;
218 screen_info->lfb_linelength = vesa->bytes_per_scanline;
219 screen_info->lfb_base = vesa->phys_base_ptr;
220 screen_info->lfb_size =
221 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
223 screen_info->lfb_size >>= 16;
224 screen_info->red_size = vesa->red_mask_size;
225 screen_info->red_pos = vesa->red_mask_pos;
226 screen_info->green_size = vesa->green_mask_size;
227 screen_info->green_pos = vesa->green_mask_pos;
228 screen_info->blue_size = vesa->blue_mask_size;
229 screen_info->blue_pos = vesa->blue_mask_pos;
230 screen_info->rsvd_size = vesa->reserved_mask_size;
231 screen_info->rsvd_pos = vesa->reserved_mask_pos;
234 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
237 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
238 struct pci_rom_header *rom = NULL, *ram = NULL;
240 bool emulate, alloced;
243 /* Only execute VGA ROMs */
244 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
245 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
246 PCI_CLASS_DISPLAY_VGA);
250 if (!board_should_load_oprom(dev))
253 ret = pci_rom_probe(dev, &rom);
257 ret = pci_rom_load(rom, &ram, &alloced);
261 if (!board_should_run_oprom(dev)) {
266 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
267 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
268 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
270 debug("Selected vesa mode %#x\n", vesa_mode);
272 if (exec_method & PCI_ROM_USE_NATIVE) {
276 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
277 printf("BIOS native execution is only available on x86\n");
284 #ifdef CONFIG_BIOSEMU
287 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
288 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
297 #ifdef CONFIG_BIOSEMU
300 ret = biosemu_setup(dev, &info);
303 biosemu_set_interrupt_handler(0x15, int15_handler);
304 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
305 true, vesa_mode, &mode_info);
310 #if defined(CONFIG_X86) && CONFIG_IS_ENABLED(X86_32BIT_INIT)
311 bios_set_interrupt_handler(0x15, int15_handler);
313 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
317 debug("Final vesa mode %#x\n", mode_info.video_mode);
326 #ifdef CONFIG_DM_VIDEO
327 int vbe_setup_video_priv(struct vesa_mode_info *vesa,
328 struct video_priv *uc_priv,
329 struct video_uc_platdata *plat)
331 if (!vesa->x_resolution)
333 uc_priv->xsize = vesa->x_resolution;
334 uc_priv->ysize = vesa->y_resolution;
335 switch (vesa->bits_per_pixel) {
338 uc_priv->bpix = VIDEO_BPP32;
341 uc_priv->bpix = VIDEO_BPP16;
344 return -EPROTONOSUPPORT;
346 plat->base = vesa->phys_base_ptr;
347 plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
352 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void))
354 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
355 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
360 /* If we are running from EFI or coreboot, this can't work */
361 if (!ll_boot_init()) {
362 printf("Not available (previous bootloader prevents it)\n");
365 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
366 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE |
367 PCI_ROM_ALLOW_FALLBACK);
368 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
370 debug("failed to run video BIOS: %d\n", ret);
374 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat);
376 debug("No video mode configured\n");
380 printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
381 mode_info.vesa.bits_per_pixel);