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// Bochs VGA interface to extended "VBE" modes
//
// Copyright (C) 2012 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2011 Julian Pidancet <julian.pidancet@citrix.com>
// Copyright (C) 2002 Jeroen Janssen
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "vgabios.h" // struct vbe_modeinfo
#include "vbe.h" // VBE_CAPABILITY_8BIT_DAC
#include "bochsvga.h" // bochsvga_set_mode
#include "util.h" // dprintf
#include "config.h" // CONFIG_*
#include "biosvar.h" // GET_GLOBAL
#include "stdvga.h" // VGAREG_SEQU_ADDRESS
#include "hw/pci.h" // pci_config_readl
#include "hw/pci_regs.h" // PCI_BASE_ADDRESS_0
/****************************************************************
* Mode tables
****************************************************************/
static struct bochsvga_mode
{
u16 mode;
struct vgamode_s info;
} bochsvga_modes[] VAR16 = {
/* standard modes */
{ 0x100, { MM_PACKED, 640, 400, 8, 8, 16, SEG_GRAPH } },
{ 0x101, { MM_PACKED, 640, 480, 8, 8, 16, SEG_GRAPH } },
{ 0x102, { MM_PLANAR, 800, 600, 4, 8, 16, SEG_GRAPH } },
{ 0x103, { MM_PACKED, 800, 600, 8, 8, 16, SEG_GRAPH } },
{ 0x104, { MM_PLANAR, 1024, 768, 4, 8, 16, SEG_GRAPH } },
{ 0x105, { MM_PACKED, 1024, 768, 8, 8, 16, SEG_GRAPH } },
{ 0x106, { MM_PLANAR, 1280, 1024, 4, 8, 16, SEG_GRAPH } },
{ 0x107, { MM_PACKED, 1280, 1024, 8, 8, 16, SEG_GRAPH } },
{ 0x10D, { MM_DIRECT, 320, 200, 15, 8, 16, SEG_GRAPH } },
{ 0x10E, { MM_DIRECT, 320, 200, 16, 8, 16, SEG_GRAPH } },
{ 0x10F, { MM_DIRECT, 320, 200, 24, 8, 16, SEG_GRAPH } },
{ 0x110, { MM_DIRECT, 640, 480, 15, 8, 16, SEG_GRAPH } },
{ 0x111, { MM_DIRECT, 640, 480, 16, 8, 16, SEG_GRAPH } },
{ 0x112, { MM_DIRECT, 640, 480, 24, 8, 16, SEG_GRAPH } },
{ 0x113, { MM_DIRECT, 800, 600, 15, 8, 16, SEG_GRAPH } },
{ 0x114, { MM_DIRECT, 800, 600, 16, 8, 16, SEG_GRAPH } },
{ 0x115, { MM_DIRECT, 800, 600, 24, 8, 16, SEG_GRAPH } },
{ 0x116, { MM_DIRECT, 1024, 768, 15, 8, 16, SEG_GRAPH } },
{ 0x117, { MM_DIRECT, 1024, 768, 16, 8, 16, SEG_GRAPH } },
{ 0x118, { MM_DIRECT, 1024, 768, 24, 8, 16, SEG_GRAPH } },
{ 0x119, { MM_DIRECT, 1280, 1024, 15, 8, 16, SEG_GRAPH } },
{ 0x11A, { MM_DIRECT, 1280, 1024, 16, 8, 16, SEG_GRAPH } },
{ 0x11B, { MM_DIRECT, 1280, 1024, 24, 8, 16, SEG_GRAPH } },
{ 0x11C, { MM_PACKED, 1600, 1200, 8, 8, 16, SEG_GRAPH } },
{ 0x11D, { MM_DIRECT, 1600, 1200, 15, 8, 16, SEG_GRAPH } },
{ 0x11E, { MM_DIRECT, 1600, 1200, 16, 8, 16, SEG_GRAPH } },
{ 0x11F, { MM_DIRECT, 1600, 1200, 24, 8, 16, SEG_GRAPH } },
/* BOCHS modes */
{ 0x140, { MM_DIRECT, 320, 200, 32, 8, 16, SEG_GRAPH } },
{ 0x141, { MM_DIRECT, 640, 400, 32, 8, 16, SEG_GRAPH } },
{ 0x142, { MM_DIRECT, 640, 480, 32, 8, 16, SEG_GRAPH } },
{ 0x143, { MM_DIRECT, 800, 600, 32, 8, 16, SEG_GRAPH } },
{ 0x144, { MM_DIRECT, 1024, 768, 32, 8, 16, SEG_GRAPH } },
{ 0x145, { MM_DIRECT, 1280, 1024, 32, 8, 16, SEG_GRAPH } },
{ 0x146, { MM_PACKED, 320, 200, 8, 8, 16, SEG_GRAPH } },
{ 0x147, { MM_DIRECT, 1600, 1200, 32, 8, 16, SEG_GRAPH } },
{ 0x148, { MM_PACKED, 1152, 864, 8, 8, 16, SEG_GRAPH } },
{ 0x149, { MM_DIRECT, 1152, 864, 15, 8, 16, SEG_GRAPH } },
{ 0x14a, { MM_DIRECT, 1152, 864, 16, 8, 16, SEG_GRAPH } },
{ 0x14b, { MM_DIRECT, 1152, 864, 24, 8, 16, SEG_GRAPH } },
{ 0x14c, { MM_DIRECT, 1152, 864, 32, 8, 16, SEG_GRAPH } },
{ 0x178, { MM_DIRECT, 1280, 800, 16, 8, 16, SEG_GRAPH } },
{ 0x179, { MM_DIRECT, 1280, 800, 24, 8, 16, SEG_GRAPH } },
{ 0x17a, { MM_DIRECT, 1280, 800, 32, 8, 16, SEG_GRAPH } },
{ 0x17b, { MM_DIRECT, 1280, 960, 16, 8, 16, SEG_GRAPH } },
{ 0x17c, { MM_DIRECT, 1280, 960, 24, 8, 16, SEG_GRAPH } },
{ 0x17d, { MM_DIRECT, 1280, 960, 32, 8, 16, SEG_GRAPH } },
{ 0x17e, { MM_DIRECT, 1440, 900, 16, 8, 16, SEG_GRAPH } },
{ 0x17f, { MM_DIRECT, 1440, 900, 24, 8, 16, SEG_GRAPH } },
{ 0x180, { MM_DIRECT, 1440, 900, 32, 8, 16, SEG_GRAPH } },
{ 0x181, { MM_DIRECT, 1400, 1050, 16, 8, 16, SEG_GRAPH } },
{ 0x182, { MM_DIRECT, 1400, 1050, 24, 8, 16, SEG_GRAPH } },
{ 0x183, { MM_DIRECT, 1400, 1050, 32, 8, 16, SEG_GRAPH } },
{ 0x184, { MM_DIRECT, 1680, 1050, 16, 8, 16, SEG_GRAPH } },
{ 0x185, { MM_DIRECT, 1680, 1050, 24, 8, 16, SEG_GRAPH } },
{ 0x186, { MM_DIRECT, 1680, 1050, 32, 8, 16, SEG_GRAPH } },
{ 0x187, { MM_DIRECT, 1920, 1200, 16, 8, 16, SEG_GRAPH } },
{ 0x188, { MM_DIRECT, 1920, 1200, 24, 8, 16, SEG_GRAPH } },
{ 0x189, { MM_DIRECT, 1920, 1200, 32, 8, 16, SEG_GRAPH } },
{ 0x18a, { MM_DIRECT, 2560, 1600, 16, 8, 16, SEG_GRAPH } },
{ 0x18b, { MM_DIRECT, 2560, 1600, 24, 8, 16, SEG_GRAPH } },
{ 0x18c, { MM_DIRECT, 2560, 1600, 32, 8, 16, SEG_GRAPH } },
};
static int dispi_found VAR16 = 0;
static int is_bochsvga_mode(struct vgamode_s *vmode_g)
{
return (vmode_g >= &bochsvga_modes[0].info
&& vmode_g <= &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)-1].info);
}
struct vgamode_s *bochsvga_find_mode(int mode)
{
struct bochsvga_mode *m = bochsvga_modes;
if (GET_GLOBAL(dispi_found))
for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++)
if (GET_GLOBAL(m->mode) == mode)
return &m->info;
return stdvga_find_mode(mode);
}
void
bochsvga_list_modes(u16 seg, u16 *dest, u16 *last)
{
struct bochsvga_mode *m = bochsvga_modes;
if (GET_GLOBAL(dispi_found)) {
for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)] && dest<last; m++) {
u16 mode = GET_GLOBAL(m->mode);
if (mode == 0xffff)
continue;
SET_FARVAR(seg, *dest, mode);
dest++;
}
}
stdvga_list_modes(seg, dest, last);
}
/****************************************************************
* Helper functions
****************************************************************/
int
bochsvga_get_window(struct vgamode_s *vmode_g, int window)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_get_window(vmode_g, window);
if (window != 0)
return -1;
return dispi_read(VBE_DISPI_INDEX_BANK);
}
int
bochsvga_set_window(struct vgamode_s *vmode_g, int window, int val)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_set_window(vmode_g, window, val);
if (window != 0)
return -1;
dispi_write(VBE_DISPI_INDEX_BANK, val);
if (dispi_read(VBE_DISPI_INDEX_BANK) != val)
return -1;
return 0;
}
int
bochsvga_get_linelength(struct vgamode_s *vmode_g)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_get_linelength(vmode_g);
return dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * vga_bpp(vmode_g) / 8;
}
int
bochsvga_set_linelength(struct vgamode_s *vmode_g, int val)
{
stdvga_set_linelength(vmode_g, val);
if (GET_GLOBAL(dispi_found)) {
int pixels = (val * 8) / vga_bpp(vmode_g);
dispi_write(VBE_DISPI_INDEX_VIRT_WIDTH, pixels);
}
return 0;
}
int
bochsvga_get_displaystart(struct vgamode_s *vmode_g)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_get_displaystart(vmode_g);
int bpp = vga_bpp(vmode_g);
int linelength = dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * bpp / 8;
int x = dispi_read(VBE_DISPI_INDEX_X_OFFSET);
int y = dispi_read(VBE_DISPI_INDEX_Y_OFFSET);
return x * bpp / 8 + linelength * y;
}
int
bochsvga_set_displaystart(struct vgamode_s *vmode_g, int val)
{
stdvga_set_displaystart(vmode_g, val);
if (GET_GLOBAL(dispi_found)) {
int bpp = vga_bpp(vmode_g);
int linelength = dispi_read(VBE_DISPI_INDEX_VIRT_WIDTH) * bpp / 8;
dispi_write(VBE_DISPI_INDEX_X_OFFSET, (val % linelength) * 8 / bpp);
dispi_write(VBE_DISPI_INDEX_Y_OFFSET, val / linelength);
}
return 0;
}
int
bochsvga_get_dacformat(struct vgamode_s *vmode_g)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_get_dacformat(vmode_g);
u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE);
return (en & VBE_DISPI_8BIT_DAC) ? 8 : 6;
}
int
bochsvga_set_dacformat(struct vgamode_s *vmode_g, int val)
{
if (!GET_GLOBAL(dispi_found))
return stdvga_set_dacformat(vmode_g, val);
u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE);
if (val == 6)
en &= ~VBE_DISPI_8BIT_DAC;
else if (val == 8)
en |= VBE_DISPI_8BIT_DAC;
else
return -1;
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
return 0;
}
int
bochsvga_size_state(int states)
{
int size = stdvga_size_state(states);
if (size < 0)
return size;
if (GET_GLOBAL(dispi_found) && (states & 8))
size += (VBE_DISPI_INDEX_Y_OFFSET-VBE_DISPI_INDEX_XRES+1)*sizeof(u16);
return size;
}
int
bochsvga_save_state(u16 seg, void *data, int states)
{
int ret = stdvga_save_state(seg, data, states);
if (ret < 0)
return ret;
if (!GET_GLOBAL(dispi_found))
return 0;
if (!(states & 8))
return 0;
u16 *info = (data + stdvga_size_state(states));
u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE);
SET_FARVAR(seg, *info, en);
info++;
if (!(en & VBE_DISPI_ENABLED))
return 0;
int i;
for (i = VBE_DISPI_INDEX_XRES; i <= VBE_DISPI_INDEX_Y_OFFSET; i++)
if (i != VBE_DISPI_INDEX_ENABLE) {
u16 v = dispi_read(i);
SET_FARVAR(seg, *info, v);
info++;
}
return 0;
}
int
bochsvga_restore_state(u16 seg, void *data, int states)
{
int ret = stdvga_restore_state(seg, data, states);
if (ret < 0)
return ret;
if (!GET_GLOBAL(dispi_found))
return 0;
if (!(states & 8))
return 0;
u16 *info = (data + stdvga_size_state(states));
u16 en = GET_FARVAR(seg, *info);
info++;
if (!(en & VBE_DISPI_ENABLED)) {
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
return 0;
}
int i;
for (i = VBE_DISPI_INDEX_XRES; i <= VBE_DISPI_INDEX_Y_OFFSET; i++)
if (i == VBE_DISPI_INDEX_ENABLE) {
dispi_write(i, en);
} else {
dispi_write(i, GET_FARVAR(seg, *info));
info++;
}
return 0;
}
/****************************************************************
* Mode setting
****************************************************************/
int
bochsvga_set_mode(struct vgamode_s *vmode_g, int flags)
{
if (GET_GLOBAL(dispi_found))
dispi_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
if (! is_bochsvga_mode(vmode_g))
return stdvga_set_mode(vmode_g, flags);
if (!GET_GLOBAL(dispi_found))
return -1;
u8 depth = GET_GLOBAL(vmode_g->depth);
if (depth == 4)
stdvga_set_mode(stdvga_find_mode(0x6a), 0);
if (depth == 8)
// XXX load_dac_palette(3);
;
dispi_write(VBE_DISPI_INDEX_BPP, depth);
u16 width = GET_GLOBAL(vmode_g->width);
u16 height = GET_GLOBAL(vmode_g->height);
dispi_write(VBE_DISPI_INDEX_XRES, width);
dispi_write(VBE_DISPI_INDEX_YRES, height);
dispi_write(VBE_DISPI_INDEX_BANK, 0);
u16 bf = ((flags & MF_NOCLEARMEM ? VBE_DISPI_NOCLEARMEM : 0)
| (flags & MF_LINEARFB ? VBE_DISPI_LFB_ENABLED : 0));
dispi_write(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | bf);
/* VGA compat setup */
u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
stdvga_crtc_write(crtc_addr, 0x11, 0x00);
stdvga_crtc_write(crtc_addr, 0x01, width / 8 - 1);
stdvga_set_linelength(vmode_g, width);
stdvga_crtc_write(crtc_addr, 0x12, height - 1);
u8 v = 0;
if ((height - 1) & 0x0100)
v |= 0x02;
if ((height - 1) & 0x0200)
v |= 0x40;
stdvga_crtc_mask(crtc_addr, 0x07, 0x42, v);
stdvga_crtc_write(crtc_addr, 0x09, 0x00);
stdvga_crtc_mask(crtc_addr, 0x17, 0x00, 0x03);
stdvga_attr_mask(0x10, 0x00, 0x01);
stdvga_grdc_write(0x06, 0x05);
stdvga_sequ_write(0x02, 0x0f);
if (depth >= 8) {
stdvga_crtc_mask(crtc_addr, 0x14, 0x00, 0x40);
stdvga_attr_mask(0x10, 0x00, 0x40);
stdvga_sequ_mask(0x04, 0x00, 0x08);
stdvga_grdc_mask(0x05, 0x20, 0x40);
}
stdvga_attrindex_write(0x20);
return 0;
}
/****************************************************************
* Init
****************************************************************/
int
bochsvga_setup(void)
{
int ret = stdvga_setup();
if (ret)
return ret;
/* Sanity checks */
dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID0);
if (dispi_read(VBE_DISPI_INDEX_ID) != VBE_DISPI_ID0) {
dprintf(1, "No VBE DISPI interface detected, falling back to stdvga\n");
return 0;
}
dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID5);
SET_VGA(dispi_found, 1);
if (GET_GLOBAL(HaveRunInit))
return 0;
u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS;
int bdf = GET_GLOBAL(VgaBDF);
if (CONFIG_VGA_PCI && bdf >= 0) {
int barid = 0;
u32 bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_0);
if ((bar & PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
barid = 1;
bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_1);
}
lfb_addr = bar & PCI_BASE_ADDRESS_MEM_MASK;
dprintf(1, "VBE DISPI: bdf %02x:%02x.%x, bar %d\n", pci_bdf_to_bus(bdf)
, pci_bdf_to_dev(bdf), pci_bdf_to_fn(bdf), barid);
}
SET_VGA(VBE_framebuffer, lfb_addr);
u32 totalmem = dispi_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K) * 64 * 1024;
SET_VGA(VBE_total_memory, totalmem);
SET_VGA(VBE_win_granularity, 64);
SET_VGA(VBE_capabilities, VBE_CAPABILITY_8BIT_DAC);
dprintf(1, "VBE DISPI: lfb_addr=%x, size %d MB\n",
lfb_addr, totalmem >> 20);
// Validate modes
u16 en = dispi_read(VBE_DISPI_INDEX_ENABLE);
dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
u16 max_xres = dispi_read(VBE_DISPI_INDEX_XRES);
u16 max_bpp = dispi_read(VBE_DISPI_INDEX_BPP);
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
struct bochsvga_mode *m = bochsvga_modes;
for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++) {
u16 width = GET_GLOBAL(m->info.width);
u16 height = GET_GLOBAL(m->info.height);
u8 depth = GET_GLOBAL(m->info.depth);
u32 mem = (height * DIV_ROUND_UP(width * vga_bpp(&m->info), 8)
* stdvga_vram_ratio(&m->info));
if (width > max_xres || depth > max_bpp || mem > totalmem) {
dprintf(1, "Removing mode %x\n", GET_GLOBAL(m->mode));
SET_VGA(m->mode, 0xffff);
}
}
return 0;
}