ref: 6540a9a21ae4f62f512f3e95063561d87e80701c
dir: /sys/src/cmd/aux/vga/i81x.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
/*
* Intel 81x chipset family.
* mem[0]: AGP aperture memory, 64MB for 810-DC100, from 0xF4000000
* mem[1]: GC Register mmio space, 512KB for 810-DC100, from 0xFF000000
* For the memory of David Hogan, died April 9, 2003, who wrote this driver
* first for LCD.
* August 28, 2003 Kenji Okamoto
*/
typedef struct {
Pcidev* pci;
uchar* mmio;
ulong clk[6];
ulong lcd[9];
ulong pixconf;
} I81x;
static void
snarf(Vga* vga, Ctlr* ctlr)
{
int i;
uchar *mmio;
ulong *rp;
Pcidev *p;
I81x *i81x;
if(vga->private == nil){
vga->private = alloc(sizeof(I81x));
p = vga->pci;
if(p == nil){
while((p = pcimatch(p, 0x8086, 0)) != nil) {
switch(p->did) {
default:
continue;
case 0x7121: /* Vanilla 82810 */
case 0x7123: /* 810-DC100, DELL OptiPlex GX100 */
case 0x7125: /* 82810E */
case 0x1102: /* 82815 FSB limited to 100MHz */
case 0x1112: /* 82815 no AGP */
case 0x1132: /* 82815 fully featured Solano */
case 0x3577: /* IBM R31 uses intel 830M chipset */
break;
}
break;
}
if(p == nil)
error("%s: Intel 81x graphics function not found\n", ctlr->name);
}
vga->f[1] = 230000000; /* MAX speed of internal DAC (Hz)*/
vgactlpci(p);
vgactlw("type", "i81x");
mmio = segattach(0, "i81xmmio", 0, p->mem[1].size);
if(mmio == (void*)-1)
error("%s: can't attach mmio segment\n", ctlr->name);
i81x = vga->private;
i81x->pci = p;
i81x->mmio = mmio;
}
i81x = vga->private;
/* must give aperture memory size for frame buffer memory
such as 64*1024*1024 */
vga->vma = vga->vmz = i81x->pci->mem[0].size;
// vga->vmz = 8*1024*1024;
vga->apz = i81x->pci->mem[0].size;
ctlr->flag |= Hlinear;
vga->graphics[0x10] = vgaxi(Grx, 0x10);
vga->attribute[0x11] = vgaxi(Attrx, 0x11); /* overscan color */
for(i=0; i < 0x19; i++)
vga->crt[i] = vgaxi(Crtx, i);
for(i=0x30; i <= 0x82; i++) /* set CRT Controller Register (CR) */
vga->crt[i] = vgaxi(Crtx, i);
/* 0x06000: Clock Control Register base address (3 VCO frequency control) */
rp = (ulong*)(i81x->mmio+0x06000);
for(i = 0; i < nelem(i81x->clk); i++)
i81x->clk[i] = *rp++;
/* i830 CRTC registers (A) */
rp = (ulong*)(i81x->mmio+0x60000);
for(i = 0; i < nelem(i81x->lcd); i++)
i81x->lcd[i] = *rp++;
rp = (ulong*)(i81x->mmio+0x70008); /* Pixel Pipeline Control register A */
i81x->pixconf = *rp;
ctlr->flag |= Fsnarf;
}
static void
options(Vga*, Ctlr* ctlr)
{
ctlr->flag |= Hlinear|Foptions;
}
static void
i81xdclk(I81x *i81x, Vga *vga) /* freq = MHz */
{
int m, n, post, mtp, ntp;
double md, freq, error;
freq = vga->mode->deffrequency/1000000.0;
if (freq == 0)
sysfatal("i81xdclk: deffrequency %d becomes freq 0.0",
vga->mode->deffrequency);
post = log(600.0/freq)/log(2.0);
for(ntp=3;;ntp++) {
md = freq*(1<<post)/(24.0/(double)ntp)/4.0;
mtp = (int)(md+0.5);
if(mtp<3) mtp=3;
error = 1.0-freq/(md/(ntp*(1<<post))*4*24.0);
if((fabs(error) < 0.001) || ((ntp > 30) && (fabs(error) < 0.005)))
break;
}
m = vga->m[1] = mtp-2;
n = vga->n[1] = ntp-2;
vga->r[1] = post;
i81x->clk[2] = ((n & 0x3FF)<<16) | (m & 0x3FF);
i81x->clk[4] = (i81x->clk[4] & ~0x700000) | ((post & 0x07)<<20);
vga->mode->frequency = (m+2)/((n+2)*(1<<post))*4*24*1000000;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
I81x *i81x;
int vt, vde, vrs, vre;
ulong *rp;
i81x = vga->private;
/* <<TODO>>
i81x->clk[3]: LCD_CLKD: 0x0600c~0x0600f, default=00030013h
(VCO N-divisor=03h, M-divisor=13h)
i81x->clk[4]: DCLK_0DS: 0x06010~0x06013, Post value, default=40404040h means
Post Divisor=16, VCO Loop divisor = 4xM for all clocks.
Display&LCD Clock Devisor Select Reg = 0x40404040 ==> (LCD)(Clock2)(Clock1)(Clock0)
*/
i81x->clk[0] = 0x00030013;
i81x->clk[1] = 0x00100053;
rp = (ulong*)i81x->mmio+0x6010;
i81x->clk[4] = *rp;
i81x->clk[4] |= 0x4040;
vga->misc = vgai(MiscR);
switch(vga->virtx) {
case 640: /* 640x480 DCLK_0D 25.175MHz dot clock */
vga->misc &= ~0x0A;
break;
case 720: /* 720x480 DCLK_1D 28.322MHz dot clock */
vga->misc = (vga->misc & ~0x08) | (1<<2);
break;
case 800:
case 1024:
case 1152:
case 1280:
case 1376:
vga->misc = vga->misc | (2<<2) & ~0x02; /* prohibit to access frame buffer */
i81xdclk(i81x, vga);
break;
default: /* for other higher resolution DCLK_2D */
error("%s: Only 800, 1024, 1152, 1280, 1376 resolutions are supported\n", ctlr->name);
}
/* <<TODO>>
i830 LCD Controller, at i81x->mmio+0x60000
i81x->lcd[0]: Horizontal Total Reg. 0x60000
i81x->lcd[1]: Horizontal Blanking Reg. 0x60004
i81x->lcd[2]: Horizontal Sync Reg. 0x60008
i81x->lcd[3]: Vertical Total Reg. 0x6000c
i81x->lcd[4]: Vertical Blanking Reg. 0x60010
i81x->lcd[5]: Vertical Sync Reg. 0x60014
i81x->lcd[6]: Pixel Pipeline A Sequencer Register Control(SRC,0~7) 0x6001c
i81x->lcd[7]: BCLRPAT_A 0x60020
i81x->lcd[8]: 0
*/
/*
* Pixel pipeline control register 0x70008:
* 16/24bp bypasses palette,
* hw cursor enabled(1<<12), hi-res mode(1<<0), depth(16-19 bit)
* 8bit DAC enable (1<<15), don't wrap to 256kM memory of VGA(1<<1).
* enable extended palette addressing (1<<8)
*/
i81x->pixconf = (1<<12)|(1<<0);
i81x->pixconf &= 0xFFFFFBFF; /* disable overscan color */
switch(vga->mode->z) { /* vga->mode->z: color depth */
case 8:
i81x->pixconf |= (2<<16);
break;
case 16: /* (5:6:5 bit) */
i81x->pixconf |= (5<<16);
break;
case 24:
i81x->pixconf |= (6<<16);
break;
case 32: /* not supported */
i81x->pixconf |= (7<<16);
break;
default:
error("%s: depth %d not supported\n", ctlr->name, vga->mode->z);
}
/* DON'T CARE of Sequencer Reg. */
/* DON'T CARE of Attribute registers other than this */
vga->attribute[0x11] = 0; /* over scancolor = black */
/* DON't CARE of graphics[1], [2], [3], [4], [5], [6], [7] and [8] value */
if(vga->linear && (ctlr->flag & Hlinear)) {
/* enable linear mapping, no VGA memory and no page mapping */
vga->graphics[0x10] = 0x0A;
ctlr->flag |= Ulinear;
}
vt = vga->mode->vt;
vde = vga->virty;
vrs = vga->mode->vrs;
vre = vga->mode->vre+6; /* shift 7 pixel up */
if(vga->mode->interlace == 'v') {
vt /= 2;
vde /= 2;
vrs /= 2;
vre /= 2;
}
/* Reset Row scan */
vga->crt[8] = 0;
/* Line Compare, bit 6 of crt[9], bit 4 of crt[7] and crt[0x18], should be
* vga->crt[9] = vgaxi(Crtx, 9) | ((vde>>9 & 1)<<6) & 0x7F;
* vga->crt[7] = vgaxi(Crtx, 7) | ((vde>>8 & 1)<<4);
* vga->crt[0x18] = vde & 0xFF;
* However, above values don't work!! I don't know why. K.Okamoto
*/
vga->crt[9] = 0; /* I don't know why ? */
vga->crt[7] = 0; /* I don't know why ? */
vga->crt[0x18] = 0; /* I don't know why ? */
/* 32 bits Start Address of frame buffer (AGP aperture memory)
vga->crt[0x42] = MSB 8 bits of Start Address Register, extended high start address Reg.
vga->crt[0x40] = higer 6 bits in 0~5 bits, and the MSB = 1, extebded start address Reg.
vga->crt[0x0C] = Start Address High Register
vga->crt[0x0D] = Start Address Low Register
LSB 2 bits of Start Address are always 0
*/
vga->crt[0x42] = vga->pci->mem[0].bar>>24 & 0xFF;
vga->crt[0x40] = vga->pci->mem[0].bar>>18 & 0x3F | 0x80;
/* Start Address High */
vga->crt[0x0C] = vga->pci->mem[0].bar>>10 & 0xFF;
/* Start Address Low */
vga->crt[0x0D] = (vga->pci->mem[0].bar >>2 + 1)& 0xFF;
/* Underline Location, Memory Mode, DON'T CARE THIS VALUE */
vga->crt[0x14] = 0x0;
/* CRT Mode Control */
vga->crt[0x17] = 0x80; /* CRT normal mode */
/* Frame buffer memory offset (memory amount for a line) */
/* vga->crt[0x13] = lower 8 bits of Offset Register
vga->crt[0x41] = MSB 4 bits, those value should be
vga->crt[0x13] = (vga->virtx*(vga->mode->z>>3)/4) & 0xFF;
vga->crt[0x41] = (vga->virtx*(vga->mode->z>>3)/4)>>8 & 0x0F;
However, those doesn't work properly K.Okamoto
*/
vga->crt[0x41] = (vga->crt[0x13]>>8) & 0x0F; //dhog
/* Horizontal Total */
vga->crt[0] = ((vga->mode->ht>>3)-6) & 0xFF;
/* Extended Horizontal Total Time Reg (ht) */
vga->crt[0x35] = vga->mode->ht>>12 & 0x01;
// vga->crt[0x35] = (((vga->mode->ht>>1)-5)>>8) & 0x01; //dhog
/* Horizontal Display Enable End == horizontal width */
vga->crt[1] = (vga->virtx-1)>>3 & 0xFF;
/* Horizontal Blanking Start */
vga->crt[2] = ((vga->mode->shb>>3)-1) & 0xFF;
/* Horizontal blanking End crt[39](0),crt[5](7),crt[3](4:0) */
vga->crt[3] = (vga->mode->shb - vga->virtx)>>3 & 0x1F;
vga->crt[5] = ((vga->mode->shb - vga->virtx)>>3 & 0x20) <<2;
vga->crt[0x39] = ((vga->mode->shb - vga->virtx)>>3 & 0x40) >>6;
// vga->crt[0x39] = (vga->mode->ehb>>9) & 0x01; //dhog
/* Horizontal Sync Start */
vga->crt[4] = vga->mode->shs>>3 & 0xFF;
/* Horizontal Sync End */
vga->crt[5] |= vga->mode->ehs>>3 & 0x1F;
/* Extended Vertical Total (vt) */
vga->crt[6] = (vt - 2) & 0xFF;
vga->crt[0x30] = (vt - 2)>>8 & 0x0F;
/* Vertical Sync Period */
vga->crt[0x11] = (vre - vrs - 2) & 0x0F;
/* Vertical Blanking End */
vga->crt[0x16] = (vre - vrs) & 0xFF;
/* Extended Vertical Display End (y) */
vga->crt[0x12] = (vde-1) & 0xFF;
vga->crt[0x31] = (vde-1)>>8 & 0x0f;
/* Extended Vertical Sync Start (vrs) */
vga->crt[0x10] = (vrs-1) & 0xFF;
vga->crt[0x32] = (vrs-1)>>8 & 0x0F;
/* Extended Vertical Blanking Start (vrs) */
vga->crt[0x15] = vrs & 0xFF;
vga->crt[0x33] = vrs>>8 & 0x0F;
if(vga->mode->interlace == 'v')
vga->crt[0x70] = vrs | 0x80;
else
vga->crt[0x70] = 0;
vga->crt[0x80] = 1;
ctlr->flag |= Finit;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
int i;
ulong *rp;
I81x *i81x;
char *p;
i81x = vga->private;
vgaxo(Attrx, 0x11, vga->attribute[0x11]);
/* set the screen graphic mode */
vgaxo(Crtx, 0x80, vga->crt[0x80]);
vgaxo(Grx, 0x10, vga->graphics[0x10]);
vgao(MiscW, vga->misc);
for(i=0; i <= 0x18; i++)
vgaxo(Crtx, i, vga->crt[i]);
for(i=0x30; i <= 0x82; i++)
vgaxo(Crtx, i, vga->crt[i]);
vga->crt[0x40] |= 0x80; /* set CR40, then set the MSB bit of it */
vgaxo(Crtx, 0x40, vga->crt[0x40]);
/* 0x06000 = offset of Vertical Clock Devisor VGA0 */
rp = (ulong*)(i81x->mmio+0x06000);
for(i=0; i < nelem(i81x->clk); i++)
*rp++ = i81x->clk[i];
rp = (ulong*)(i81x->mmio+0x60000);
for(i = 0; i < nelem(i81x->lcd); i++)
*rp++ = i81x->lcd[i];
/* set cursor, graphic mode */
rp = (ulong*)(i81x->mmio+0x70008);
*rp = i81x->pixconf | (1<<8);
p = (char*)(i81x->mmio+Pixmask); /* DACMASK */
*p = 0xff;
p = (char*)(i81x->mmio+PaddrW); /* DACWX */
*p = 0x04;
p = (char*)(i81x->mmio+Pdata); /* DACDATA */
*p = 0xff;
*p = 0xff;
*p = 0xff;
*p = 0x00;
*p = 0x00;
*p = 0x00;
*rp = i81x->pixconf;
ctlr->flag |= Fload;
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
int i;
Pcidev *p;
I81x *i81x;
char *name;
name = ctlr->name;
i81x = vga->private;
printitem(name, "Crt30");
for(i = 0x30; i <= 0x39; i++)
printreg(vga->crt[i]);
printitem(name, "Crt40");
for(i = 0x40; i <= 0x42; i++)
printreg(vga->crt[i]);
printitem(name, "Crt70");
for(i = 0x70; i <= 0x79; i++)
printreg(vga->crt[i]);
printitem(name, "Crt80");
for(i = 0x80; i <= 0x82; i++)
printreg(vga->crt[i]);
printitem(name, "Graphics10");
for(i = 0x10; i <= 0x1f; i++)
printreg(vga->graphics[i]);
printitem(name, "clk");
for(i = 0; i < nelem(i81x->clk); i++)
printreg(i81x->clk[i]);
printitem(name, "lcd");
for(i = 0; i < nelem(i81x->lcd); i++)
printreg(i81x->lcd[i]);
printitem(name, "pixconf");
printreg(i81x->pixconf);
p = i81x->pci;
printitem(name, "mem[0]");
Bprint(&stdout, "base %lux size %d\n", p->mem[0].bar & ~0x0F, p->mem[0].size);
printitem(name, "mem[1]");
Bprint(&stdout, "base %lux size %d\n", p->mem[1].bar & ~0x0F, p->mem[1].size);
}
Ctlr i81x = {
"i81x", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr i81xhwgc = {
"i81xhwgc", /* name */
0, /* snarf */
0, /* options */
0, /* init */
0, /* load */
0, /* dump */
};