ref: a065270fd74fff6a19dc5178d8829d3122226225
dir: /sys/src/cmd/vmx/vesa.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include <draw.h>
#include "dat.h"
#include "fns.h"
static uchar vesabios[512] = {
0x55, 0xaa, 0x01, 0xcb, 0x60, 0x1e, 0x06, 0x8c, 0xd0, 0xba, 0xe0, 0xfe, 0xef, 0x89, 0xe0, 0xba, 0xe1, 0xfe, 0xef, 0xba, 0xe2, 0xfe, 0xed, 0x85, 0xc0, 0x7c, 0x28, 0x50, 0x25, 0x00,
0xf0, 0x8e, 0xc0, 0xba, 0xe3, 0xfe, 0xed, 0x89, 0xc6, 0xc3, 0x26, 0x8b, 0x04, 0xba, 0xe4, 0xfe, 0xef, 0xeb, 0xe2, 0xba, 0xe4, 0xfe, 0xed, 0x26, 0x89, 0x04, 0xeb, 0xd9, 0xba, 0xe4,
0xfe, 0xed, 0x26, 0x88, 0x04, 0xeb, 0xd0, 0x58, 0x58, 0x61, 0xcf,
};
enum {
READCMD = 0x28,
WRITEWCMD = 0x31,
WRITEBCMD = 0x3a,
};
typedef struct VESAIO VESAIO;
struct VESAIO {
u8int port;
u16int val;
};
Channel *vesawchan, *vesarchan;
typedef struct Ureg16 Ureg16;
struct Ureg16 {
u16int ax, bx, cx, dx;
u16int si, di, bp;
u16int ds, es;
};
#define ESDI(u) ((u).di + ((u).es<<4))
typedef struct Vesa Vesa;
struct Vesa {
u32int romptr;
u32int oemstring, oemvendor, oemproduct, oemproductrev;
u32int modetab;
u8int pal8;
} vesa;
#define FARPTR(x) (((x)&0xf0000)<<12|(u16int)(x))
extern VgaMode *modes, **modeslast, *curmode, *nextmode, textmode;
extern int curhbytes, nexthbytes;
extern uintptr fbaddr, fbsz;
extern int maxw, maxh;
enum { CMAP4 = CHAN1(CMap, 4) };
static VgaMode *
findmode(u16int m)
{
VgaMode *p;
for(p = modes; p != nil; p = p->next)
if(p->no == m)
return p;
return nil;
}
static int
vesagetsp(void)
{
VESAIO io;
u32int rc;
loop:
while(recv(vesarchan, &io), io.port != 0)
sendul(vesawchan, -1);
rc = io.val << 4;
sendul(vesawchan, -1);
recv(vesarchan, &io);
sendul(vesawchan, -1);
if(io.port != 1) goto loop;
return rc + io.val;
}
static int
vesawrite(int addr, u32int val, int sz)
{
VESAIO io;
assert(sz == 1 || sz == 2 || sz == 4);
recv(vesarchan, &io);
if(io.port != 0x12){
no: sendul(vesawchan, -1);
return -1;
}
sendul(vesawchan, (sz > 1 ? WRITEWCMD : WRITEBCMD) | addr >> 4 & 0xf000);
recv(vesarchan, &io);
if(io.port != 0x13) goto no;
sendul(vesawchan, addr);
recv(vesarchan, &io);
if(io.port != 0x14) goto no;
sendul(vesawchan, val);
if(sz == 4)
return vesawrite(addr + 2, val >> 16, 2);
return 0;
}
static int
vesaread(int addr)
{
VESAIO io;
recv(vesarchan, &io);
if(io.port != 0x12){
no: sendul(vesawchan, -1);
return -1;
}
sendul(vesawchan, READCMD);
recv(vesarchan, &io);
if(io.port != 0x13) goto no;
sendul(vesawchan, addr);
recv(vesarchan, &io);
if(io.port != 0x4) goto no;
sendul(vesawchan, -1);
return io.val;
}
static int
vesaregs(u32int sp, Ureg16 *ur)
{
int rc;
#define R(n, a) rc = vesaread(sp + n); if(rc < 0) return -1; ur->a = rc
memset(ur, 0, sizeof(*ur));
R(0, es);
R(2, ds);
R(4, di);
R(6, si);
R(8, bp);
R(12, bx);
R(14, dx);
R(16, cx);
R(18, ax);
return 0;
#undef R
}
static int
vesasetregs(u32int sp, Ureg16 *ur)
{
#define R(n, a) if(vesawrite(sp + n, ur->a, 2) < 0) return -1;
R(0, es);
R(2, ds);
R(4, di);
R(6, si);
R(8, bp);
R(12, bx);
R(14, dx);
R(16, cx);
R(18, ax);
return 0;
#undef R
}
#define vesasetax(sp, val) vesawrite(sp+18, val, 2)
#define vesasetbx(sp, val) vesawrite(sp+12, val, 2)
static int
vesapack(int addr, char *fmt, ...)
{
va_list va;
static u8int checksum;
int v;
char *p;
int numb;
if(addr < 0) return -1;
numb = 0;
va_start(va, fmt);
for(; *fmt != 0; fmt++)
switch(*fmt){
case ' ': break;
case 'b': v = va_arg(va, int); if(vesawrite(addr, v, 1) < 0) return -1; addr += 1; checksum += v; break;
case 'w': v = va_arg(va, int); if(vesawrite(addr, v, 2) < 0) return -1; addr += 2; checksum += v + (v >> 8); break;
case 'd': v = va_arg(va, int); if(vesawrite(addr, v, 4) < 0) return -1; addr += 4; checksum += v + (v >> 8) + (v >> 16) + (v >> 24); break;
case 's':
p = va_arg(va, char *);
for(; *p != 0; p++, addr++){
if(vesawrite(addr, *p, 1) < 0)
return -1;
checksum += *p;
}
break;
case 'S':
p = va_arg(va, char *);
v = va_arg(va, int);
while(v-- > 0){
if(vesawrite(addr++, *p, 1) < 0)
return -1;
checksum += *p++;
}
break;
case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
numb = strtol(fmt, &fmt, 10);
fmt--;
break;
case 'f':
for(; numb >= 2; numb -= 2, addr += 2)
if(vesawrite(addr, 0, 2) < 0) return -1;
if(numb == 1){
if(vesawrite(addr++, 0, 1) < 0) return -1;
numb = 0;
}
break;
case 'c': if(vesawrite(addr, -checksum, 1) < 0) return -1; addr += 1; break;
case 'C': checksum = 0; break;
default: vmerror("vesapack: unknown char %c", *fmt); return -1;
}
va_end(va);
return addr;
}
static int
vesarompack(char *fmt, ...)
{
va_list va;
uchar *v, *v0;
int rc, x;
void *s;
v0 = gptr(vesa.romptr, 0x8000);
v = v0;
assert(v != nil);
va_start(va, fmt);
for(; *fmt != 0; fmt++)
switch(*fmt){
case 'b': *(u8int*)v = va_arg(va, int); v++; break;
case 'w': *(u16int*)v = va_arg(va, int); v += 2; break;
case 'd': *(u32int*)v = va_arg(va, int); v += 4; break;
case 'a': v = (uchar*)strecpy((char*)v, (char*)v + 0x8000, va_arg(va, char*)); *v++ = 0; break;
case 'S': s = va_arg(va, void *); x = va_arg(va, int); memcpy(v, s, x); v += x; break;
default: sysfatal("vesarompack: unknown char %c", *fmt);
}
va_end(va);
rc = vesa.romptr;
vesa.romptr += v - v0;
return rc;
}
static int
vesamodeget(int addr, u16int mode, u16int *retv)
{
VgaMode *p;
u8int model;
u8int nred, pred, ngreen, pgreen, nblue, pblue, nx, px;
int i, pos, s;
p = findmode(mode);
if(p == nil){
vmerror("vesa: Return VBE Mode Information: unknown mode %#x", mode);
*retv = 0x014F;
return 0;
}
*retv = 0x004F;
model = 6;
nred = pred = ngreen = pgreen = 0;
nblue = pblue = nx = px = 0;
pos = 0;
for(i = 0; i < 4; i++){
s = p->chan >> 8 * i & 15;
if(s == 0) continue;
switch(p->chan >> 8 * i + 4 & 15){
case CRed: nred = s; pred = pos; break;
case CGreen: ngreen = s; pgreen = pos; break;
case CBlue: nblue = s; pblue = pos; break;
case CAlpha: case CIgnore: nx = s; px = pos; break;
case CMap: model = 4; break;
}
pos += s;
}
return vesapack(addr, "wbbwwwwdw wwbbbbbbbbb bbbbbbbbb ddw wbbbbb bbbbbd 189f",
1<<0|1<<1|1<<3|1<<4|1<<5|1<<6|1<<7, /* attributes: color graphics, vga incompatible, linear framebuffer */
0, 0, 0, 0, 0, 0, 0, p->hbytes, /* windowing crap */
p->w, p->h,
0, 0, /* character size */
1, chantodepth(p->chan), 1, /* 1 bank, 1 plane, N bpp */
model, /* memory model */
0, 0, 1, /* no banking/paging */
nred, pred, ngreen, pgreen, nblue, pblue, nx, px, /* masks */
0, /* no ramp, reserved bits are reserved */
fbaddr,
0, 0, /* reserved */
p->hbytes, 0, 0,
nred, pred, ngreen, pgreen, nblue, pblue, nx, px, /* masks */
p->w * p->h * 60 * 2 /* max pixelclock */);
}
static int
vesamodeset(u16int mode, u16int *retv)
{
VgaMode *p;
mode &= 0x1ff;
if(mode == 3){
*retv = 0x04F;
nextmode = &textmode;
return 0;
}
p = findmode(mode);
if(p == nil){
vmerror("vesa: Set VBE Mode: unknown mode %#x", mode);
*retv = 0x14F;
return 0;
}
*retv = 0x04F;
nextmode = p;
nexthbytes = p->hbytes;
vesa.pal8 = 0;
return 0;
}
static int
vesalinelen(Ureg16 *ur)
{
int d;
int nhb, x;
d = chantodepth(nextmode->chan);
if(nextmode == &textmode || d == 0) goto fail;
switch(ur->bx & 0xff){
case 0:
nhb = d * ur->cx / 8;
set:
if((d & 7) != 0){
vmerror("vesa: set logical length unsupported on bitdepth < 8");
fail: ur->ax = 0x014F;
return 0;
}
if(nhb * nextmode->h > fbsz){
ur->ax = 0x024F;
return 0;
}
nexthbytes = nhb;
ur->ax = 0x4F;
ur->bx = nhb;
ur->cx = nhb * 8 / d;
ur->dx = fbsz / nhb;
break;
case 1:
ur->ax = 0x4F;
ur->bx = nexthbytes;
ur->cx = nexthbytes * 8 / d;
ur->dx = fbsz / nexthbytes;
break;
case 2:
nhb = ur->cx;
goto set;
case 3:
x = fbsz / nextmode->h;
ur->ax = 0x4F;
ur->bx = x;
ur->cx = x * 8 / d;
ur->dx = nextmode->h;
break;
default:
vmerror("vesa: unsupported subfunction %#x of SetGetLogicalLineLength", ur->bx & 0xff);
}
return 0;
}
static int
vesapalformat(Ureg16 *ur)
{
switch(ur->bx & 0xff){
case 0:
vesa.pal8 = (ur->bx >> 8) >= 8;
case 1:
ur->ax = 0x4F;
ur->bx = vesa.pal8 ? 8 : 6;
break;
default:
vmerror("vesa: unsupported subfunction %#x of SetGetDACPaletteFormat", ur->bx & 0xff);
}
return 0;
}
static int
vesapal(Ureg16 *ur)
{
int i;
int addr;
u32int c;
int r, g, b;
switch(ur->bx & 0xff){
case 0:
case 0x80:
if(ur->dx >= 256 || ur->cx > 256){
ur->ax = 0x014F;
return 0;
}
ur->ax = 0x4F;
addr = ESDI(*ur);
for(i = ur->dx; i < ur->dx + ur->cx; i++){
b = vesaread(addr);
if(b < 0) return -1;
g = b >> 8;
b = b & 0xff;
r = vesaread(addr + 2);
if(r < 0) return -1;
r &= 0xff;
if(!vesa.pal8){
r <<= 2;
g <<= 2;
b <<= 2;
}
vgasetpal(i, r << 24 | g << 16 | b << 8 | 0xff);
addr += 4;
}
break;
case 0x1:
if(ur->dx >= 256 || ur->cx > 256){
ur->ax = 0x014F;
return 0;
}
ur->ax = 0x4F;
addr = ESDI(*ur);
for(i = ur->dx; i < ur->dx + ur->cx; i++){
c = vgagetpal(i);
r = c >> 24; g = c >> 16; b = c >> 8;
if(!vesa.pal8){
r >>= 2;
g >>= 2;
b >>= 2;
}
addr = vesapack(addr, "bbbb", b, g, r, 0);
}
return addr >= 0 ? 0 : -1;
default:
vmerror("vesa: unsupported subfunction %#x of SetGetPaletteData", ur->bx & 0xff);
}
return 0;
}
static void
stdtiming(u8int *arr)
{
VgaMode *m;
u8int s1, s2;
int i;
memset(arr, 1, 16);
for(m = modes; m != nil; m = m->next){
if(m->w < 256 || m->w > 2288 || m->w > maxw || m->h > maxh) continue;
if((m->w & 7) != 0) continue;
if(m->w == 640 && m->h == 480) continue;
if(m->w == 800 && m->h == 600) continue;
if(m->w == 1024 && m->h == 768) continue;
if(m->w == 1280 && m->h == 1024) continue;
if(m->w * 10 == m->w * 16)
s2 = 0x00;
else if(m->w * 3 == m->h * 4)
s2 = 0x40;
else if(m->w * 4 == m->h * 5)
s2 = 0x80;
else if(m->w * 9 == m->w * 16)
s2 = 0xc0;
else
continue;
s1 = m->w / 8 - 31;
for(i = 0; i < 16; i += 2){
if(arr[i] == s1 && arr[i+1] == s2)
goto skip;
if(arr[i] == 1 && arr[i+1] == 1)
break;
}
if(i == 16) skip: continue;
arr[i] = s1;
arr[i+1] = s2;
}
}
static int
detailtiming(int addr, VgaMode **m)
{
u32int hv, hfp, hsp, hbp, hmm;
u32int vv, vfp, vsp, vbp, vmm;
u32int freq;
again:
if(*m == nil)
return vesapack(addr, "d14f", 0x10000000);
/* when in doubt, make shit up */
hv = (*m)->w;
hfp = hv / 40;
hsp = hv * 3 / 20;
hbp = hfp * 4 + hsp;
vv = (*m)->h;
vfp = (vv + 24) / 48;
vsp = (vv + 120) / 240;
vbp = vfp * 3 + vsp;
freq = (hv + hfp + hsp + hbp) * (vv + vfp + vsp + vbp) * 60;
hmm = hv * 254 / 960; /* assume 96 dpi */
vmm = vv * 254 / 960;
*m = (*m)->next;
if(hv > maxw || vv > maxh || hv > 0xfff || hfp > 0x3ff || hsp > 0x3ff || vfp > 63 || vsp > 63)
goto again;
return vesapack(addr, "w bbbbbbbbbb bbbbb b",
freq / 10000,
hv, hbp, hv >> 4 & 0xf0 | hbp >> 8 & 0xf,
vv, vbp, vv >> 4 & 0xf0 | vbp >> 8 & 0xf,
hfp, hsp,
vfp << 4 & 0xf0 | vsp & 0xf,
hfp >> 2 & 0xc0 | hsp >> 4 & 0x30 | vfp >> 2 & 0x0c | vsp >> 4 & 0x03,
hmm, vmm,
hmm >> 4 & 0xf0 | vmm >> 8 & 0xf,
0, 0, 0x1f);
}
static int
vesaddc(Ureg16 *ur)
{
int addr;
u32int tim;
u8int std[16];
VgaMode *m;
switch(ur->bx & 0xff){
case 0:
ur->ax = 0x004F;
ur->bx = 3;
break;
case 1:
addr = ESDI(*ur);
stdtiming(std);
switch(ur->dx){
case 0:
ur->ax = 0x004F;
tim = 0;
if(maxw >= 640 && maxh >= 480) tim |= 0x3c;
if(maxw >= 800 && maxh >= 600) tim |= 0xc003;
if(maxw >= 1024 && maxh >= 768) tim |= 0xe00;
if(maxw >= 1280 && maxh >= 1024) tim |= 0x100;
addr = vesapack(addr, "Cdd bbbbdbb bb bbbbb bbbbb bbbbb wb S",
0xFFFFFF00,
0x00FFFFFF,
0x0c, 0x34, 0xa7, 0xac, /* manufacturer & product id */
1701, /* serial no */
0xff, 27, /* model year 2017 */
1, 4, /* edid version */
0xa1, /* DVI input */
maxw >= maxh ? maxw * 100 / maxh - 99 : 0, /* landscape aspect ratio */
maxw < maxh ? maxh * 100 / maxw - 99 : 0, /* portrait aspect ratio */
0x78, /* gamma=2.2 */
7, /* srgb & have preferred timing mode */
0, 0, 0, 0, 0, /* chromaticity coordinates */
0, 0, 0, 0, 0,
tim, tim >> 16,
std, 16);
m = modes;
addr = detailtiming(addr, &m);
addr = detailtiming(addr, &m);
addr = detailtiming(addr, &m);
addr = vesapack(addr, "3fbb bbbb bbbb bbbbb",
0xfd, 0xa, 1, 0xff, 1, 0xff, 0xff, 0x04, 0x11,
maxw >> 11 & 3, maxw >> 3, 0xf8, 0x18, 0, 60);
addr = vesapack(addr, "bc", 0);
if(addr < 0) return -1;
break;
default:
ur->ax = 0x014F;
}
break;
default:
vmerror("vesa: unsupported subfunction %#x of VBE/DDC", ur->bx & 0xff);
}
return 0;
}
static void
vesathread(void *)
{
u32int sp;
Ureg16 ur;
for(;;){
sp = vesagetsp();
// vmdebug("SP = %.8ux", sp);
if(vesaregs(sp, &ur) < 0) continue;
// vmdebug("AX = %.4x BX=%.4x CX=%.4x DX=%.4x", ur.ax, ur.bx, ur.cx, ur.dx);
// vmdebug("SI = %.4x DI=%.4x BP=%.4x", ur.si, ur.di, ur.bp);
// vmdebug("DS = %.4x ES=%.4x", ur.ds, ur.es);
switch(ur.ax){
case 0x4f00:
if(vesapack(ESDI(ur), "swdddwwddd",
"VESA", /* VbeSignature */
0x0300, /* VbeVersion */
FARPTR(vesa.oemstring), /* OemStringPtr */
1, /* Capabilities (support 8 bit colors) */
FARPTR(vesa.modetab), /* VideoModePtr */
fbsz >> 16, /* TotalMemory */
0x100 /* OemSoftwareRev */,
FARPTR(vesa.oemvendor), /* OemVendorNamePtr */
FARPTR(vesa.oemproduct), /* OemProductNamePtr */
FARPTR(vesa.oemproductrev) /* OemProductRevPtr */) < 0)
continue;
if(vesasetax(sp, 0x004F) < 0) continue;
break;
case 0x4f01:
if(vesamodeget(ESDI(ur), ur.cx, &ur.ax) < 0) continue;
if(vesasetax(sp, ur.ax) < 0) continue;
break;
case 0x4f02:
if(vesamodeset(ur.bx, &ur.ax) < 0 || vesasetax(sp, ur.ax) < 0) continue;
break;
case 0x4f03:
if(vesasetax(sp, 0x004F) < 0) continue;
if(vesasetbx(sp, nextmode->no | 0x4000) < 0) continue;
break;
case 0x4f06:
if(vesalinelen(&ur) < 0 || vesasetregs(sp, &ur) < 0) continue;
break;
case 0x4f08:
if(vesapalformat(&ur) < 0 || vesasetregs(sp, &ur) < 0) continue;
break;
case 0x4f09:
if(vesapal(&ur) < 0 || vesasetregs(sp, &ur) < 0) continue;
break;
case 0x4f15:
if(vesaddc(&ur) < 0 || vesasetregs(sp, &ur) < 0) continue;
break;
default:
vmerror("vesa: unsupported function %#x", ur.ax);
}
}
}
static void
addmode(int no, int x, int y, u32int chan)
{
VgaMode *vm;
vm = emalloc(sizeof(VgaMode));
vm->no = no;
vm->w = x;
vm->h = y;
vm->chan = chan;
vm->hbytes = chantodepth(chan) * vm->w + 7 >> 3;
vm->sz = vm->hbytes * y;
*modeslast = vm;
modeslast = &vm->next;
}
void
vesainit(void)
{
void *v;
int i, c;
int mno;
VgaMode *p;
v = gptr(0xc0000, sizeof(vesabios));
if(v == nil) sysfatal("vesainit: gptr failed");
for(i = 0, c = 0; i < sizeof(vesabios) - 1; i++)
c += vesabios[i];
vesabios[sizeof(vesabios) - 1] = -c;
vesa.romptr = 0xc0000;
vesarompack("S", vesabios, sizeof(vesabios));
v = gptr(0, 1024);
if(v == nil) sysfatal("vesainit: gptr failed");
PUT32(v, 0x40, 0xc0000004);
vesa.oemstring = vesarompack("a", "9front vmx(1)");
vesa.oemvendor = vesarompack("a", "9front");
vesa.oemproduct = vesarompack("a", "cat graphics adapter");
vesa.oemproductrev = vesarompack("a", "∞");
vesa.modetab = vesa.romptr;
mno = 0x120;
for(p = modes; p != nil; p = p->next){
p->no = mno++;
vesarompack("w", p->no);
}
vesarompack("w", 0xffff);
addmode(0x100, 640, 400, CMAP8);
addmode(0x101, 640, 480, CMAP8);
addmode(0x102, 800, 600, CMAP4);
addmode(0x6A, 800, 600, CMAP4);
addmode(0x103, 800, 600, CMAP8);
addmode(0x104, 1024, 768, CMAP4);
addmode(0x105, 1024, 768, CMAP8);
addmode(0x106, 1280, 1024, CMAP4);
addmode(0x107, 1280, 1024, CMAP8);
addmode(0x10D, 320, 200, RGB15);
addmode(0x10E, 320, 200, RGB16);
addmode(0x10F, 320, 200, RGB24);
addmode(0x110, 640, 480, RGB15);
addmode(0x111, 640, 480, RGB16);
addmode(0x112, 640, 480, RGB24);
addmode(0x113, 800, 600, RGB15);
addmode(0x114, 800, 600, RGB16);
addmode(0x115, 800, 600, RGB24);
addmode(0x116, 1024, 768, RGB15);
addmode(0x117, 1024, 768, RGB16);
addmode(0x118, 1024, 768, RGB24);
addmode(0x119, 1280, 1024, RGB15);
addmode(0x11A, 1280, 1024, RGB16);
addmode(0x11B, 1280, 1024, RGB24);
vesarchan = chancreate(sizeof(VESAIO), 0);
vesawchan = chancreate(sizeof(ulong), 0);
threadcreate(vesathread, nil, 8192);
}
u32int
vesaio(int isin, u16int port, u32int val, int sz, void *)
{
VESAIO io;
if(sz != 2) return iowhine(isin, port, val, sz, nil);
io.port = isin << 4 | port & 0xf;
io.val = val;
send(vesarchan, &io);
return recvul(vesawchan);
}