/* * This file is part of the coreboot project. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <stdint.h> #include <delay.h> #include <edid.h> #include <stdlib.h> #include <string.h> #include <arch/io.h> #include <boot/coreboot_tables.h> #include <console/console.h> #include <device/device.h> #include <device/pci.h> #include <device/pci_ids.h> #include <device/pci_ops.h> #include <pc80/vga.h> #include <pc80/vga_io.h> /* VGA init. We use the Bochs VESA VBE extensions */ #define VBE_DISPI_IOPORT_INDEX 0x01CE #define VBE_DISPI_IOPORT_DATA 0x01CF #define VBE_DISPI_INDEX_ID 0x0 #define VBE_DISPI_INDEX_XRES 0x1 #define VBE_DISPI_INDEX_YRES 0x2 #define VBE_DISPI_INDEX_BPP 0x3 #define VBE_DISPI_INDEX_ENABLE 0x4 #define VBE_DISPI_INDEX_BANK 0x5 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7 #define VBE_DISPI_INDEX_X_OFFSET 0x8 #define VBE_DISPI_INDEX_Y_OFFSET 0x9 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa #define VBE_DISPI_ID0 0xB0C0 #define VBE_DISPI_ID1 0xB0C1 #define VBE_DISPI_ID2 0xB0C2 #define VBE_DISPI_ID4 0xB0C4 #define VBE_DISPI_ID5 0xB0C5 #define VBE_DISPI_DISABLED 0x00 #define VBE_DISPI_ENABLED 0x01 #define VBE_DISPI_LFB_ENABLED 0x40 #define VBE_DISPI_NOCLEARMEM 0x80 static int width = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_XRES; static int height = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_YRES; static void bochs_write(int index, int val) { outw(index, VBE_DISPI_IOPORT_INDEX); outw(val, VBE_DISPI_IOPORT_DATA); } static int bochs_read(int index) { outw(index, VBE_DISPI_IOPORT_INDEX); return inw(VBE_DISPI_IOPORT_DATA); } static void bochs_init_linear_fb(struct device *dev) { struct edid edid; int id, mem, bar; u32 addr; /* bochs dispi detection */ id = bochs_read(VBE_DISPI_INDEX_ID); if ((id & 0xfff0) != VBE_DISPI_ID0) { printk(BIOS_DEBUG, "QEMU VGA: bochs dispi: ID mismatch.\n"); return; } mem = bochs_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024; /* find lfb pci bar */ addr = pci_read_config32(dev, PCI_BASE_ADDRESS_0); if ((addr & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY) { /* qemu -vga {std,qxl} */ bar = 0; } else { /* qemu -vga vmware */ addr = pci_read_config32(dev, PCI_BASE_ADDRESS_1); bar = 1; } addr &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; if (!addr) return; printk(BIOS_DEBUG, "QEMU VGA: bochs dispi interface found, " "%d MiB video memory\n", mem / ( 1024 * 1024)); printk(BIOS_DEBUG, "QEMU VGA: framebuffer @ %x (pci bar %d)\n", addr, bar); /* setup video mode */ bochs_write(VBE_DISPI_INDEX_ENABLE, 0); bochs_write(VBE_DISPI_INDEX_BANK, 0); bochs_write(VBE_DISPI_INDEX_BPP, 32); bochs_write(VBE_DISPI_INDEX_XRES, width); bochs_write(VBE_DISPI_INDEX_YRES, height); bochs_write(VBE_DISPI_INDEX_VIRT_WIDTH, width); bochs_write(VBE_DISPI_INDEX_VIRT_HEIGHT, height); bochs_write(VBE_DISPI_INDEX_X_OFFSET, 0); bochs_write(VBE_DISPI_INDEX_Y_OFFSET, 0); bochs_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED); outb(0x20, 0x3c0); /* disable blanking */ /* setup coreboot framebuffer */ edid.mode.ha = width; edid.mode.va = height; edid.panel_bits_per_color = 8; edid.panel_bits_per_pixel = 24; edid_set_framebuffer_bits_per_pixel(&edid, 32, 0); set_vbe_mode_info_valid(&edid, addr); } static void bochs_init_text_mode(struct device *dev) { vga_misc_write(0x1); vga_textmode_init(); } static void bochs_init(struct device *dev) { if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER)) bochs_init_linear_fb(dev); else if (IS_ENABLED(CONFIG_VGA_TEXT_FRAMEBUFFER)) bochs_init_text_mode(dev); } static struct device_operations qemu_graph_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_dev_enable_resources, .init = bochs_init, .scan_bus = 0, }; static const struct pci_driver qemu_stdvga_driver __pci_driver = { .ops = &qemu_graph_ops, .vendor = 0x1234, .device = 0x1111, }; static const struct pci_driver qemu_vmware_driver __pci_driver = { .ops = &qemu_graph_ops, .vendor = 0x15ad, .device = 0x0405, }; static const struct pci_driver qemu_qxl_driver __pci_driver = { .ops = &qemu_graph_ops, .vendor = 0x1b36, .device = 0x0100, };