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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 "pci.h" // pci_config_readl
#include "pci_regs.h" // PCI_BASE_ADDRESS_0
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 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);
}
static u16 dispi_get_max_xres(void)
{
u16 en;
u16 xres;
en = dispi_read(VBE_DISPI_INDEX_ENABLE);
dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
xres = dispi_read(VBE_DISPI_INDEX_XRES);
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
return xres;
}
static u16 dispi_get_max_bpp(void)
{
u16 en;
u16 bpp;
en = dispi_read(VBE_DISPI_INDEX_ENABLE);
dispi_write(VBE_DISPI_INDEX_ENABLE, en | VBE_DISPI_GETCAPS);
bpp = dispi_read(VBE_DISPI_INDEX_BPP);
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
return bpp;
}
/* Called only during POST */
int
bochsvga_init(void)
{
int ret = stdvga_init();
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\n");
return -1;
}
dispi_write(VBE_DISPI_INDEX_ID, VBE_DISPI_ID5);
u32 lfb_addr = VBE_DISPI_LFB_PHYSICAL_ADDRESS;
int bdf = GET_GLOBAL(VgaBDF);
if (CONFIG_VGA_PCI && bdf >= 0)
lfb_addr = (pci_config_readl(bdf, PCI_BASE_ADDRESS_0)
& PCI_BASE_ADDRESS_MEM_MASK);
SET_VGA(VBE_framebuffer, lfb_addr);
u16 totalmem = dispi_read(VBE_DISPI_INDEX_VIDEO_MEMORY_64K);
SET_VGA(VBE_total_memory, totalmem * 64 * 1024);
SET_VGA(VBE_capabilities, VBE_CAPABILITY_8BIT_DAC);
dprintf(1, "VBE DISPI detected. lfb_addr=%x\n", lfb_addr);
return 0;
}
static int mode_valid(struct vgamode_s *vmode_g)
{
u16 max_xres = dispi_get_max_xres();
u16 max_bpp = dispi_get_max_bpp();
u32 max_mem = GET_GLOBAL(VBE_total_memory);
u16 width = GET_GLOBAL(vmode_g->width);
u16 height = GET_GLOBAL(vmode_g->height);
u8 depth = GET_GLOBAL(vmode_g->depth);
u32 mem = width * height * DIV_ROUND_UP(depth, 8);
return width <= max_xres && depth <= max_bpp && mem <= max_mem;
}
struct vgamode_s *bochsvga_find_mode(int mode)
{
struct bochsvga_mode *m = bochsvga_modes;
for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)]; m++)
if (GET_GLOBAL(m->mode) == mode) {
if (! mode_valid(&m->info))
return NULL;
return &m->info;
}
return stdvga_find_mode(mode);
}
void
bochsvga_list_modes(u16 seg, u16 *dest, u16 *last)
{
struct bochsvga_mode *m = bochsvga_modes;
for (; m < &bochsvga_modes[ARRAY_SIZE(bochsvga_modes)] && dest<last; m++) {
if (!mode_valid(&m->info))
continue;
dprintf(1, "VBE found mode %x valid.\n", GET_GLOBAL(m->mode));
SET_FARVAR(seg, *dest, GET_GLOBAL(m->mode));
dest++;
}
stdvga_list_modes(seg, dest, last);
}
static void
bochsvga_hires_enable(int enable)
{
u16 flags = enable ?
VBE_DISPI_ENABLED |
VBE_DISPI_LFB_ENABLED |
VBE_DISPI_NOCLEARMEM : 0;
dispi_write(VBE_DISPI_INDEX_ENABLE, flags);
}
int
bochsvga_get_window(struct vgamode_s *vmode_g, int 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 (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)
{
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);
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)
{
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);
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;
}
static void
bochsvga_clear_scr(void)
{
u16 en;
en = dispi_read(VBE_DISPI_INDEX_ENABLE);
en &= ~VBE_DISPI_NOCLEARMEM;
dispi_write(VBE_DISPI_INDEX_ENABLE, en);
}
int
bochsvga_set_mode(struct vgamode_s *vmode_g, int flags)
{
if (! is_bochsvga_mode(vmode_g)) {
bochsvga_hires_enable(0);
return stdvga_set_mode(vmode_g, flags);
}
bochsvga_hires_enable(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);
/* VGA compat setup */
//XXX: This probably needs some reverse engineering
u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
stdvga_crtc_write(crtc_addr, 0x11, 0x00);
stdvga_crtc_write(crtc_addr, 0x01, width / 8 - 1);
dispi_write(VBE_DISPI_INDEX_VIRT_WIDTH, 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);
}
if (flags & MF_LINEARFB) {
/* Linear frame buffer */
/* XXX: ??? */
}
if (!(flags & MF_NOCLEARMEM)) {
bochsvga_clear_scr();
}
return 0;
}
|
