1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2014 Google, Inc
5 * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
8 * Copyright (C) 2003-2004 Linux Networx
9 * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
10 * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
11 * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
12 * Copyright (C) 2005-2006 Tyan
13 * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
14 * Copyright (C) 2005-2009 coresystems GmbH
15 * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
17 * PCI Bus Services, see include/linux/pci.h for further explanation.
19 * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
20 * David Mosberger-Tang
22 * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
25 #define LOG_CATEGORY UCLASS_PCI
28 #include <bios_emul.h>
29 #include <bootstage.h>
40 #include <acpi/acpi_s3.h>
41 #include <linux/screen_info.h>
43 DECLARE_GLOBAL_DATA_PTR;
45 __weak bool board_should_run_oprom(struct udevice *dev)
47 #if defined(CONFIG_X86) && defined(CONFIG_HAVE_ACPI_RESUME)
48 if (gd->arch.prev_sleep_state == ACPI_S3) {
49 if (IS_ENABLED(CONFIG_S3_VGA_ROM_RUN))
59 __weak bool board_should_load_oprom(struct udevice *dev)
64 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
69 static int pci_rom_probe(struct udevice *dev, struct pci_rom_header **hdrp)
71 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
72 struct pci_rom_header *rom_header;
73 struct pci_rom_data *rom_data;
74 u16 rom_vendor, rom_device;
80 vendev = pplat->vendor << 16 | pplat->device;
81 mapped_vendev = board_map_oprom_vendev(vendev);
82 if (vendev != mapped_vendev)
83 debug("Device ID mapped to %#08x\n", mapped_vendev);
85 #ifdef CONFIG_VGA_BIOS_ADDR
86 rom_address = CONFIG_VGA_BIOS_ADDR;
89 dm_pci_read_config32(dev, PCI_ROM_ADDRESS, &rom_address);
90 if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
91 debug("%s: rom_address=%x\n", __func__, rom_address);
95 /* Enable expansion ROM address decoding. */
96 dm_pci_write_config32(dev, PCI_ROM_ADDRESS,
97 rom_address | PCI_ROM_ADDRESS_ENABLE);
99 debug("Option ROM address %x\n", rom_address);
100 rom_header = (struct pci_rom_header *)(unsigned long)rom_address;
102 debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
103 le16_to_cpu(rom_header->signature),
104 rom_header->size * 512, le16_to_cpu(rom_header->data));
106 if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
107 printf("Incorrect expansion ROM header signature %04x\n",
108 le16_to_cpu(rom_header->signature));
109 #ifndef CONFIG_VGA_BIOS_ADDR
110 /* Disable expansion ROM address decoding */
111 dm_pci_write_config32(dev, PCI_ROM_ADDRESS, rom_address);
116 rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
117 rom_vendor = le16_to_cpu(rom_data->vendor);
118 rom_device = le16_to_cpu(rom_data->device);
120 debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
121 rom_vendor, rom_device);
123 /* If the device id is mapped, a mismatch is expected */
124 if ((pplat->vendor != rom_vendor || pplat->device != rom_device) &&
125 (vendev == mapped_vendev)) {
126 printf("ID mismatch: vendor ID %04x, device ID %04x\n",
127 rom_vendor, rom_device);
128 /* Continue anyway */
131 rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
132 debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
133 rom_class, rom_data->type);
135 if (pplat->class != rom_class) {
136 debug("Class Code mismatch ROM %06x, dev %06x\n",
137 rom_class, pplat->class);
145 * pci_rom_load() - Load a ROM image and return a pointer to it
147 * @rom_header: Pointer to ROM image
148 * @ram_headerp: Returns a pointer to the image in RAM
149 * @allocedp: Returns true if @ram_headerp was allocated and needs
151 * @return 0 if OK, -ve on error. Note that @allocedp is set up regardless of
152 * the error state. Even if this function returns an error, it may have
155 static int pci_rom_load(struct pci_rom_header *rom_header,
156 struct pci_rom_header **ram_headerp, bool *allocedp)
158 struct pci_rom_data *rom_data;
159 unsigned int rom_size;
160 unsigned int image_size = 0;
165 /* Get next image, until we see an x86 version */
166 rom_header = (struct pci_rom_header *)((void *)rom_header +
169 rom_data = (struct pci_rom_data *)((void *)rom_header +
170 le16_to_cpu(rom_header->data));
172 image_size = le16_to_cpu(rom_data->ilen) * 512;
173 } while ((rom_data->type != 0) && (rom_data->indicator == 0));
175 if (rom_data->type != 0)
178 rom_size = rom_header->size * 512;
180 #ifdef PCI_VGA_RAM_IMAGE_START
181 target = (void *)PCI_VGA_RAM_IMAGE_START;
183 target = (void *)malloc(rom_size);
188 if (target != rom_header) {
189 ulong start = get_timer(0);
191 debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
192 rom_header, target, rom_size);
193 memcpy(target, rom_header, rom_size);
194 if (memcmp(target, rom_header, rom_size)) {
195 printf("VGA ROM copy failed\n");
198 debug("Copy took %lums\n", get_timer(start));
200 *ram_headerp = target;
205 struct vbe_mode_info mode_info;
207 void setup_video(struct screen_info *screen_info)
209 struct vesa_mode_info *vesa = &mode_info.vesa;
211 /* Sanity test on VESA parameters */
212 if (!vesa->x_resolution || !vesa->y_resolution)
215 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
217 screen_info->lfb_width = vesa->x_resolution;
218 screen_info->lfb_height = vesa->y_resolution;
219 screen_info->lfb_depth = vesa->bits_per_pixel;
220 screen_info->lfb_linelength = vesa->bytes_per_scanline;
221 screen_info->lfb_base = vesa->phys_base_ptr;
222 screen_info->lfb_size =
223 ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
225 screen_info->lfb_size >>= 16;
226 screen_info->red_size = vesa->red_mask_size;
227 screen_info->red_pos = vesa->red_mask_pos;
228 screen_info->green_size = vesa->green_mask_size;
229 screen_info->green_pos = vesa->green_mask_pos;
230 screen_info->blue_size = vesa->blue_mask_size;
231 screen_info->blue_pos = vesa->blue_mask_pos;
232 screen_info->rsvd_size = vesa->reserved_mask_size;
233 screen_info->rsvd_pos = vesa->reserved_mask_pos;
236 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
239 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
240 struct pci_rom_header *rom = NULL, *ram = NULL;
242 bool emulate, alloced;
245 /* Only execute VGA ROMs */
246 if (((pplat->class >> 8) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
247 debug("%s: Class %#x, should be %#x\n", __func__, pplat->class,
248 PCI_CLASS_DISPLAY_VGA);
252 if (!board_should_load_oprom(dev))
253 return log_msg_ret("Should not load OPROM", -ENXIO);
255 ret = pci_rom_probe(dev, &rom);
259 ret = pci_rom_load(rom, &ram, &alloced);
263 if (!board_should_run_oprom(dev)) {
268 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
269 defined(CONFIG_FRAMEBUFFER_VESA_MODE)
270 vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
272 debug("Selected vesa mode %#x\n", vesa_mode);
274 if (exec_method & PCI_ROM_USE_NATIVE) {
278 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
279 printf("BIOS native execution is only available on x86\n");
286 #ifdef CONFIG_BIOSEMU
289 if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
290 printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
299 #ifdef CONFIG_BIOSEMU
302 ret = biosemu_setup(dev, &info);
305 biosemu_set_interrupt_handler(0x15, int15_handler);
306 ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info,
307 true, vesa_mode, &mode_info);
312 #if defined(CONFIG_X86) && (CONFIG_IS_ENABLED(X86_32BIT_INIT) || CONFIG_TPL)
313 bios_set_interrupt_handler(0x15, int15_handler);
315 bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
319 debug("Final vesa mode %#x\n", mode_info.video_mode);
328 #ifdef CONFIG_DM_VIDEO
329 int vbe_setup_video_priv(struct vesa_mode_info *vesa,
330 struct video_priv *uc_priv,
331 struct video_uc_platdata *plat)
333 if (!vesa->x_resolution)
334 return log_msg_ret("No x resolution", -ENXIO);
335 uc_priv->xsize = vesa->x_resolution;
336 uc_priv->ysize = vesa->y_resolution;
337 uc_priv->line_length = vesa->bytes_per_scanline;
338 switch (vesa->bits_per_pixel) {
341 uc_priv->bpix = VIDEO_BPP32;
344 uc_priv->bpix = VIDEO_BPP16;
347 return -EPROTONOSUPPORT;
350 /* Use double buffering if enabled */
351 if (IS_ENABLED(CONFIG_VIDEO_COPY)) {
353 return log_msg_ret("copy", -ENFILE);
354 plat->copy_base = vesa->phys_base_ptr;
356 plat->base = vesa->phys_base_ptr;
358 log_debug("base = %lx, copy_base = %lx\n", plat->base, plat->copy_base);
359 plat->size = vesa->bytes_per_scanline * vesa->y_resolution;
364 int vbe_setup_video(struct udevice *dev, int (*int15_handler)(void))
366 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
367 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
370 /* If we are running from EFI or coreboot, this can't work */
371 if (!ll_boot_init()) {
372 printf("Not available (previous bootloader prevents it)\n");
375 bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
376 ret = dm_pci_run_vga_bios(dev, int15_handler, PCI_ROM_USE_NATIVE |
377 PCI_ROM_ALLOW_FALLBACK);
378 bootstage_accum(BOOTSTAGE_ID_ACCUM_LCD);
380 debug("failed to run video BIOS: %d\n", ret);
384 ret = vbe_setup_video_priv(&mode_info.vesa, uc_priv, plat);
386 if (ret == -ENFILE) {
388 * See video-uclass.c for how to set up reserved memory
389 * in your video driver
391 log_err("CONFIG_VIDEO_COPY enabled but driver '%s' set up no reserved memory\n",
395 debug("No video mode configured\n");
399 printf("Video: %dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
400 mode_info.vesa.bits_per_pixel);