drivers/pci/pci_rom.c - github/trini/u-boot - Gitiles

 /*
  * Copyright (C) 2014 Google, Inc
  *
  * From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
  *
  * Modifications are:
  * Copyright (C) 2003-2004 Linux Networx
  * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
  * Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
  * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
  * Copyright (C) 2005-2006 Tyan
  * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
  * Copyright (C) 2005-2009 coresystems GmbH
  * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
  *
  * PCI Bus Services, see include/linux/pci.h for further explanation.
  *
  * Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
  * David Mosberger-Tang
  *
  * Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>

  * SPDX-License-Identifier:	GPL-2.0
  */

 #include <common.h>
 #include <bios_emul.h>
 #include <errno.h>
 #include <malloc.h>
 #include <pci.h>
 #include <pci_rom.h>
 #include <vbe.h>
 #include <video_fb.h>
 #include <linux/screen_info.h>

 __weak bool board_should_run_oprom(pci_dev_t dev)
 {
 	return true;
 }

 static bool should_load_oprom(pci_dev_t dev)
 {
 	if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM))
 		return 1;
 	if (board_should_run_oprom(dev))
 		return 1;

 	return 0;
 }

 __weak uint32_t board_map_oprom_vendev(uint32_t vendev)
 {
 	return vendev;
 }

 static int pci_rom_probe(pci_dev_t dev, uint class,
 			 struct pci_rom_header **hdrp)
 {
 	struct pci_rom_header *rom_header;
 	struct pci_rom_data *rom_data;
 	u16 vendor, device;
 	u16 rom_vendor, rom_device;
 	u32 rom_class;
 	u32 vendev;
 	u32 mapped_vendev;
 	u32 rom_address;

 	pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
 	pci_read_config_word(dev, PCI_DEVICE_ID, &device);
 	vendev = vendor << 16 | device;
 	mapped_vendev = board_map_oprom_vendev(vendev);
 	if (vendev != mapped_vendev)
 		debug("Device ID mapped to %#08x\n", mapped_vendev);

 #ifdef CONFIG_VGA_BIOS_ADDR
 	rom_address = CONFIG_VGA_BIOS_ADDR;
 #else

 	pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address);
 	if (rom_address == 0x00000000 || rom_address == 0xffffffff) {
 		debug("%s: rom_address=%x\n", __func__, rom_address);
 		return -ENOENT;
 	}

 	/* Enable expansion ROM address decoding. */
 	pci_write_config_dword(dev, PCI_ROM_ADDRESS,
 			       rom_address | PCI_ROM_ADDRESS_ENABLE);
 #endif
 	debug("Option ROM address %x\n", rom_address);
 	rom_header = (struct pci_rom_header *)(unsigned long)rom_address;

 	debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
 	      le16_to_cpu(rom_header->signature),
 	      rom_header->size * 512, le16_to_cpu(rom_header->data));

 	if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
 		printf("Incorrect expansion ROM header signature %04x\n",
 		       le16_to_cpu(rom_header->signature));
 #ifndef CONFIG_VGA_BIOS_ADDR
 		/* Disable expansion ROM address decoding */
 		pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address);
 #endif
 		return -EINVAL;
 	}

 	rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
 	rom_vendor = le16_to_cpu(rom_data->vendor);
 	rom_device = le16_to_cpu(rom_data->device);

 	debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
 	      rom_vendor, rom_device);

 	/* If the device id is mapped, a mismatch is expected */
 	if ((vendor != rom_vendor || device != rom_device) &&
 	    (vendev == mapped_vendev)) {
 		printf("ID mismatch: vendor ID %04x, device ID %04x\n",
 		       rom_vendor, rom_device);
 		/* Continue anyway */
 	}

 	rom_class = (le16_to_cpu(rom_data->class_hi) << 8) | rom_data->class_lo;
 	debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
 	      rom_class, rom_data->type);

 	if (class != rom_class) {
 		debug("Class Code mismatch ROM %06x, dev %06x\n",
 		      rom_class, class);
 	}
 	*hdrp = rom_header;

 	return 0;
 }

 int pci_rom_load(struct pci_rom_header *rom_header,
 		 struct pci_rom_header **ram_headerp)
 {
 	struct pci_rom_data *rom_data;
 	unsigned int rom_size;
 	unsigned int image_size = 0;
 	void *target;

 	do {
 		/* Get next image, until we see an x86 version */
 		rom_header = (struct pci_rom_header *)((void *)rom_header +
 							    image_size);

 		rom_data = (struct pci_rom_data *)((void *)rom_header +
 				le16_to_cpu(rom_header->data));

 		image_size = le16_to_cpu(rom_data->ilen) * 512;
 	} while ((rom_data->type != 0) && (rom_data->indicator == 0));

 	if (rom_data->type != 0)
 		return -EACCES;

 	rom_size = rom_header->size * 512;

 #ifdef PCI_VGA_RAM_IMAGE_START
 	target = (void *)PCI_VGA_RAM_IMAGE_START;
 #else
 	target = (void *)malloc(rom_size);
 	if (!target)
 		return -ENOMEM;
 #endif
 	if (target != rom_header) {
 		ulong start = get_timer(0);

 		debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
 		      rom_header, target, rom_size);
 		memcpy(target, rom_header, rom_size);
 		if (memcmp(target, rom_header, rom_size)) {
 			printf("VGA ROM copy failed\n");
 			return -EFAULT;
 		}
 		debug("Copy took %lums\n", get_timer(start));
 	}
 	*ram_headerp = target;

 	return 0;
 }

 struct vbe_mode_info mode_info;

 int vbe_get_video_info(struct graphic_device *gdev)
 {
 #ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
 	struct vesa_mode_info *vesa = &mode_info.vesa;

 	gdev->winSizeX = vesa->x_resolution;
 	gdev->winSizeY = vesa->y_resolution;

 	gdev->plnSizeX = vesa->x_resolution;
 	gdev->plnSizeY = vesa->y_resolution;

 	gdev->gdfBytesPP = vesa->bits_per_pixel / 8;

 	switch (vesa->bits_per_pixel) {
 	case 32:
 	case 24:
 		gdev->gdfIndex = GDF_32BIT_X888RGB;
 		break;
 	case 16:
 		gdev->gdfIndex = GDF_16BIT_565RGB;
 		break;
 	default:
 		gdev->gdfIndex = GDF__8BIT_INDEX;
 		break;
 	}

 	gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
 	gdev->pciBase = vesa->phys_base_ptr;

 	gdev->frameAdrs = vesa->phys_base_ptr;
 	gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;

 	gdev->vprBase = vesa->phys_base_ptr;
 	gdev->cprBase = vesa->phys_base_ptr;

 	return gdev->winSizeX ? 0 : -ENOSYS;
 #else
 	return -ENOSYS;
 #endif
 }

 void setup_video(struct screen_info *screen_info)
 {
 	struct vesa_mode_info *vesa = &mode_info.vesa;

 	/* Sanity test on VESA parameters */
 	if (!vesa->x_resolution || !vesa->y_resolution)
 		return;

 	screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;

 	screen_info->lfb_width = vesa->x_resolution;
 	screen_info->lfb_height = vesa->y_resolution;
 	screen_info->lfb_depth = vesa->bits_per_pixel;
 	screen_info->lfb_linelength = vesa->bytes_per_scanline;
 	screen_info->lfb_base = vesa->phys_base_ptr;
 	screen_info->lfb_size =
 		ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
 		      65536);
 	screen_info->lfb_size >>= 16;
 	screen_info->red_size = vesa->red_mask_size;
 	screen_info->red_pos = vesa->red_mask_pos;
 	screen_info->green_size = vesa->green_mask_size;
 	screen_info->green_pos = vesa->green_mask_pos;
 	screen_info->blue_size = vesa->blue_mask_size;
 	screen_info->blue_pos = vesa->blue_mask_pos;
 	screen_info->rsvd_size = vesa->reserved_mask_size;
 	screen_info->rsvd_pos = vesa->reserved_mask_pos;
 }

 int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method)
 {
 	struct pci_rom_header *rom, *ram;
 	int vesa_mode = -1;
 	uint class;
 	bool emulate;
 	int ret;

 	/* Only execute VGA ROMs */
 	pci_read_config_dword(dev, PCI_REVISION_ID, &class);
 	if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
 		debug("%s: Class %#x, should be %#x\n", __func__, class,
 		      PCI_CLASS_DISPLAY_VGA);
 		return -ENODEV;
 	}
 	class >>= 8;

 	if (!should_load_oprom(dev))
 		return -ENXIO;

 	ret = pci_rom_probe(dev, class, &rom);
 	if (ret)
 		return ret;

 	ret = pci_rom_load(rom, &ram);
 	if (ret)
 		return ret;

 	if (!board_should_run_oprom(dev))
 		return -ENXIO;

 #if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
 		defined(CONFIG_FRAMEBUFFER_VESA_MODE)
 	vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
 #endif
 	debug("Selected vesa mode %#x\n", vesa_mode);

 	if (exec_method & PCI_ROM_USE_NATIVE) {
 #ifdef CONFIG_X86
 		emulate = false;
 #else
 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 			printf("BIOS native execution is only available on x86\n");
 			return -ENOSYS;
 		}
 		emulate = true;
 #endif
 	} else {
 #ifdef CONFIG_BIOSEMU
 		emulate = true;
 #else
 		if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
 			printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
 			return -ENOSYS;
 		}
 		emulate = false;
 #endif
 	}

 	if (emulate) {
 #ifdef CONFIG_BIOSEMU
 		BE_VGAInfo *info;

 		ret = biosemu_setup(dev, &info);
 		if (ret)
 			return ret;
 		biosemu_set_interrupt_handler(0x15, int15_handler);
 		ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true,
 				  vesa_mode, &mode_info);
 		if (ret)
 			return ret;
 #endif
 	} else {
 #ifdef CONFIG_X86
 		bios_set_interrupt_handler(0x15, int15_handler);

 		bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
 				&mode_info);
 #endif
 	}
 	debug("Final vesa mode %#x\n", mode_info.video_mode);

 	return 0;
 }
	/*
	* Copyright (C) 2014 Google, Inc
	*
	* From coreboot, originally based on the Linux kernel (drivers/pci/pci.c).
	*
	* Modifications are:
	* Copyright (C) 2003-2004 Linux Networx
	* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
	* Copyright (C) 2003-2006 Ronald G. Minnich <rminnich@gmail.com>
	* Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
	* Copyright (C) 2005-2006 Tyan
	* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
	* Copyright (C) 2005-2009 coresystems GmbH
	* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
	*
	* PCI Bus Services, see include/linux/pci.h for further explanation.
	*
	* Copyright 1993 -- 1997 Drew Eckhardt, Frederic Potter,
	* David Mosberger-Tang
	*
	* Copyright 1997 -- 1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>

	* SPDX-License-Identifier: GPL-2.0
	*/

	#include <common.h>
	#include <bios_emul.h>
	#include <errno.h>
	#include <malloc.h>
	#include <pci.h>
	#include <pci_rom.h>
	#include <vbe.h>
	#include <video_fb.h>
	#include <linux/screen_info.h>

	__weak bool board_should_run_oprom(pci_dev_t dev)
	{
	return true;
	}

	static bool should_load_oprom(pci_dev_t dev)
	{
	if (IS_ENABLED(CONFIG_ALWAYS_LOAD_OPROM))
	return 1;
	if (board_should_run_oprom(dev))
	return 1;

	return 0;
	}

	__weak uint32_t board_map_oprom_vendev(uint32_t vendev)
	{
	return vendev;
	}

	static int pci_rom_probe(pci_dev_t dev, uint class,
	struct pci_rom_header **hdrp)
	{
	struct pci_rom_header *rom_header;
	struct pci_rom_data *rom_data;
	u16 vendor, device;
	u16 rom_vendor, rom_device;
	u32 rom_class;
	u32 vendev;
	u32 mapped_vendev;
	u32 rom_address;

	pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
	pci_read_config_word(dev, PCI_DEVICE_ID, &device);
	vendev = vendor << 16 \| device;
	mapped_vendev = board_map_oprom_vendev(vendev);
	if (vendev != mapped_vendev)
	debug("Device ID mapped to %#08x\n", mapped_vendev);

	#ifdef CONFIG_VGA_BIOS_ADDR
	rom_address = CONFIG_VGA_BIOS_ADDR;
	#else

	pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_address);
	if (rom_address == 0x00000000 \|\| rom_address == 0xffffffff) {
	debug("%s: rom_address=%x\n", __func__, rom_address);
	return -ENOENT;
	}

	/* Enable expansion ROM address decoding. */
	pci_write_config_dword(dev, PCI_ROM_ADDRESS,
	rom_address \| PCI_ROM_ADDRESS_ENABLE);
	#endif
	debug("Option ROM address %x\n", rom_address);
	rom_header = (struct pci_rom_header *)(unsigned long)rom_address;

	debug("PCI expansion ROM, signature %#04x, INIT size %#04x, data ptr %#04x\n",
	le16_to_cpu(rom_header->signature),
	rom_header->size * 512, le16_to_cpu(rom_header->data));

	if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
	printf("Incorrect expansion ROM header signature %04x\n",
	le16_to_cpu(rom_header->signature));
	#ifndef CONFIG_VGA_BIOS_ADDR
	/* Disable expansion ROM address decoding */
	pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address);
	#endif
	return -EINVAL;
	}

	rom_data = (((void *)rom_header) + le16_to_cpu(rom_header->data));
	rom_vendor = le16_to_cpu(rom_data->vendor);
	rom_device = le16_to_cpu(rom_data->device);

	debug("PCI ROM image, vendor ID %04x, device ID %04x,\n",
	rom_vendor, rom_device);

	/* If the device id is mapped, a mismatch is expected */
	if ((vendor != rom_vendor \|\| device != rom_device) &&
	(vendev == mapped_vendev)) {
	printf("ID mismatch: vendor ID %04x, device ID %04x\n",
	rom_vendor, rom_device);
	/* Continue anyway */
	}

	rom_class = (le16_to_cpu(rom_data->class_hi) << 8) \| rom_data->class_lo;
	debug("PCI ROM image, Class Code %06x, Code Type %02x\n",
	rom_class, rom_data->type);

	if (class != rom_class) {
	debug("Class Code mismatch ROM %06x, dev %06x\n",
	rom_class, class);
	}
	*hdrp = rom_header;

	return 0;
	}

	int pci_rom_load(struct pci_rom_header *rom_header,
	struct pci_rom_header **ram_headerp)
	{
	struct pci_rom_data *rom_data;
	unsigned int rom_size;
	unsigned int image_size = 0;
	void *target;

	do {
	/* Get next image, until we see an x86 version */
	rom_header = (struct pci_rom_header )((void )rom_header +
	image_size);

	rom_data = (struct pci_rom_data )((void )rom_header +
	le16_to_cpu(rom_header->data));

	image_size = le16_to_cpu(rom_data->ilen) * 512;
	} while ((rom_data->type != 0) && (rom_data->indicator == 0));

	if (rom_data->type != 0)
	return -EACCES;

	rom_size = rom_header->size * 512;

	#ifdef PCI_VGA_RAM_IMAGE_START
	target = (void *)PCI_VGA_RAM_IMAGE_START;
	#else
	target = (void *)malloc(rom_size);
	if (!target)
	return -ENOMEM;
	#endif
	if (target != rom_header) {
	ulong start = get_timer(0);

	debug("Copying VGA ROM Image from %p to %p, 0x%x bytes\n",
	rom_header, target, rom_size);
	memcpy(target, rom_header, rom_size);
	if (memcmp(target, rom_header, rom_size)) {
	printf("VGA ROM copy failed\n");
	return -EFAULT;
	}
	debug("Copy took %lums\n", get_timer(start));
	}
	*ram_headerp = target;

	return 0;
	}

	struct vbe_mode_info mode_info;

	int vbe_get_video_info(struct graphic_device *gdev)
	{
	#ifdef CONFIG_FRAMEBUFFER_SET_VESA_MODE
	struct vesa_mode_info *vesa = &mode_info.vesa;

	gdev->winSizeX = vesa->x_resolution;
	gdev->winSizeY = vesa->y_resolution;

	gdev->plnSizeX = vesa->x_resolution;
	gdev->plnSizeY = vesa->y_resolution;

	gdev->gdfBytesPP = vesa->bits_per_pixel / 8;

	switch (vesa->bits_per_pixel) {
	case 32:
	case 24:
	gdev->gdfIndex = GDF_32BIT_X888RGB;
	break;
	case 16:
	gdev->gdfIndex = GDF_16BIT_565RGB;
	break;
	default:
	gdev->gdfIndex = GDF__8BIT_INDEX;
	break;
	}

	gdev->isaBase = CONFIG_SYS_ISA_IO_BASE_ADDRESS;
	gdev->pciBase = vesa->phys_base_ptr;

	gdev->frameAdrs = vesa->phys_base_ptr;
	gdev->memSize = vesa->bytes_per_scanline * vesa->y_resolution;

	gdev->vprBase = vesa->phys_base_ptr;
	gdev->cprBase = vesa->phys_base_ptr;

	return gdev->winSizeX ? 0 : -ENOSYS;
	#else
	return -ENOSYS;
	#endif
	}

	void setup_video(struct screen_info *screen_info)
	{
	struct vesa_mode_info *vesa = &mode_info.vesa;

	/* Sanity test on VESA parameters */
	if (!vesa->x_resolution \|\| !vesa->y_resolution)
	return;

	screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;

	screen_info->lfb_width = vesa->x_resolution;
	screen_info->lfb_height = vesa->y_resolution;
	screen_info->lfb_depth = vesa->bits_per_pixel;
	screen_info->lfb_linelength = vesa->bytes_per_scanline;
	screen_info->lfb_base = vesa->phys_base_ptr;
	screen_info->lfb_size =
	ALIGN(screen_info->lfb_linelength * screen_info->lfb_height,
	65536);
	screen_info->lfb_size >>= 16;
	screen_info->red_size = vesa->red_mask_size;
	screen_info->red_pos = vesa->red_mask_pos;
	screen_info->green_size = vesa->green_mask_size;
	screen_info->green_pos = vesa->green_mask_pos;
	screen_info->blue_size = vesa->blue_mask_size;
	screen_info->blue_pos = vesa->blue_mask_pos;
	screen_info->rsvd_size = vesa->reserved_mask_size;
	screen_info->rsvd_pos = vesa->reserved_mask_pos;
	}

	int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void), int exec_method)
	{
	struct pci_rom_header rom, ram;
	int vesa_mode = -1;
	uint class;
	bool emulate;
	int ret;

	/* Only execute VGA ROMs */
	pci_read_config_dword(dev, PCI_REVISION_ID, &class);
	if (((class >> 16) ^ PCI_CLASS_DISPLAY_VGA) & 0xff00) {
	debug("%s: Class %#x, should be %#x\n", __func__, class,
	PCI_CLASS_DISPLAY_VGA);
	return -ENODEV;
	}
	class >>= 8;

	if (!should_load_oprom(dev))
	return -ENXIO;

	ret = pci_rom_probe(dev, class, &rom);
	if (ret)
	return ret;

	ret = pci_rom_load(rom, &ram);
	if (ret)
	return ret;

	if (!board_should_run_oprom(dev))
	return -ENXIO;

	#if defined(CONFIG_FRAMEBUFFER_SET_VESA_MODE) && \
	defined(CONFIG_FRAMEBUFFER_VESA_MODE)
	vesa_mode = CONFIG_FRAMEBUFFER_VESA_MODE;
	#endif
	debug("Selected vesa mode %#x\n", vesa_mode);

	if (exec_method & PCI_ROM_USE_NATIVE) {
	#ifdef CONFIG_X86
	emulate = false;
	#else
	if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
	printf("BIOS native execution is only available on x86\n");
	return -ENOSYS;
	}
	emulate = true;
	#endif
	} else {
	#ifdef CONFIG_BIOSEMU
	emulate = true;
	#else
	if (!(exec_method & PCI_ROM_ALLOW_FALLBACK)) {
	printf("BIOS emulation not available - see CONFIG_BIOSEMU\n");
	return -ENOSYS;
	}
	emulate = false;
	#endif
	}

	if (emulate) {
	#ifdef CONFIG_BIOSEMU
	BE_VGAInfo *info;

	ret = biosemu_setup(dev, &info);
	if (ret)
	return ret;
	biosemu_set_interrupt_handler(0x15, int15_handler);
	ret = biosemu_run(dev, (uchar *)ram, 1 << 16, info, true,
	vesa_mode, &mode_info);
	if (ret)
	return ret;
	#endif
	} else {
	#ifdef CONFIG_X86
	bios_set_interrupt_handler(0x15, int15_handler);

	bios_run_on_x86(dev, (unsigned long)ram, vesa_mode,
	&mode_info);
	#endif
	}
	debug("Final vesa mode %#x\n", mode_info.video_mode);

	return 0;
	}