ref: 56e71d5260182e2ac32e09767b7c9440048a1d2f
dir: /sys/src/cmd/aux/vga/geode.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include "pci.h"
#include "vga.h"
#include "geode_modes.h"
enum {
Nregs = 28,
DC_UNLOCK = 0,
DC_GENERAL_CFG,
DC_DISPLAY_CFG,
DC_ARB_CFG,
DC_H_ACTIVE_TIMING = 16,
DC_H_BLANK_TIMING,
DC_H_SYNC_TIMING,
DC_V_ACTIVE_TIMING = 20,
DC_V_BLANK_TIMING,
DC_V_SYNC_TIMING,
DC_FB_ACTIVE,
DC_LINE_SIZE = 12,
DC_GFX_PITCH,
DC_UNLOCK_VALUE = 0x4758,
/* DC_GENERAL_CFG */
VGAE = 1<<7, /* VGA enable */
DFLE = 1, /* display FIFO enable */
/* DC_DISPLAY_CFG */
TGEN = 1, /* timing enable */
GDEN = 1<<3, /* graphics enable */
VDEN = 1<<4, /* video enable */
TRUP = 1<<6, /* timing register update */
PALB = 1<<25, /* palette bypass */
DISP_MODE8 = 0,
DISP_MODE16 = 1<<8,
DISP_MODE24 = 1<<9,
DISP_MODE32 = (1<<8) | (1<<9),
/* low bandwidth */
LBW_GENERAL = 0x9500,
LBW_DISPLAY = 0x8000,
LBW_ARB = 0x150001,
/* average bandwidth */
ABW_GENERAL = 0xB600,
ABW_DISPLAY = 0x9000,
ABW_ARB = 0x160001,
};
typedef struct Geode Geode;
struct Geode {
ulong *mmio;
Pcidev *pci;
ulong regs[Nregs];
uvlong clock;
};
static void
snarf(Vga* vga, Ctlr* ctlr)
{
Geode *geode;
int i;
if(!vga->private) {
geode = alloc(sizeof(Geode));
geode->pci = vga->pci;
if(geode->pci == nil){
geode->pci = pcimatch(0, 0x1022, 0x2081);
if(!geode->pci) error("%s: not found\n", ctlr->name);
}
vgactlpci(geode->pci);
vgactlw("type", "geode");
geode->mmio = segattach(0, "geodemmio", 0, geode->pci->mem[2].size);
if(geode->mmio == (ulong*)-1) error("%s: can't attach mmio segment\n", ctlr->name);
vga->private = geode;
}
else geode = vga->private;
for(i=0;i<Nregs;i++) geode->regs[i] = geode->mmio[i];
geode->clock = rdmsr(0x4C000015);
vga->crt[43] = vgaxi(Crtx, 43);
vga->crt[44] = vgaxi(Crtx, 44);
vga->crt[47] = vgaxi(Crtx, 47);
vga->crt[48] = vgaxi(Crtx, 48);
ctlr->flag |= Fsnarf;
}
static void
options(Vga* vga, Ctlr* ctlr)
{
USED(vga);
ctlr->flag |= Foptions;
}
static void
init(Vga* vga, Ctlr* ctlr)
{
Geode *geode;
Mode *m;
int i, bpp;
geode = vga->private;
m = vga->mode;
/* there has to be a better solution */
if(m->x < 1024) {
geode->regs[DC_GENERAL_CFG] = LBW_GENERAL;
geode->regs[DC_DISPLAY_CFG] = LBW_DISPLAY;
geode->regs[DC_ARB_CFG] = LBW_ARB;
} else {
geode->regs[DC_GENERAL_CFG] = ABW_GENERAL;
geode->regs[DC_DISPLAY_CFG] = ABW_DISPLAY;
geode->regs[DC_ARB_CFG] = ABW_ARB;
}
geode->regs[DC_GENERAL_CFG] |= DFLE;
geode->regs[DC_DISPLAY_CFG] |= GDEN | VDEN | TGEN | TRUP | PALB;
switch(m->z) {
case 8: bpp = 1; break;
case 15: case 16: bpp = 2; geode->regs[DC_DISPLAY_CFG] |= DISP_MODE16; break;
case 24: bpp = 3; geode->regs[DC_DISPLAY_CFG] |= DISP_MODE24; break;
case 32: bpp = 4; geode->regs[DC_DISPLAY_CFG] |= DISP_MODE32; break;
default: error("%s: unknown bpp value\n", ctlr->name); bpp = 0;
}
geode->regs[DC_H_ACTIVE_TIMING] = (m->x - 1) | ((m->ht - 1) << 16);
geode->regs[DC_H_BLANK_TIMING] = (m->shb - 1) | ((m->ehb - 1) << 16);
geode->regs[DC_H_SYNC_TIMING] = (m->shs - 1) | ((m->ehs - 1) << 16);
geode->regs[DC_V_ACTIVE_TIMING] = (m->y - 1) | ((m->vt - 1) << 16);
geode->regs[DC_V_BLANK_TIMING] = (m->vrs - 1) | ((m->vre - 1) << 16);
geode->regs[DC_V_SYNC_TIMING] = (m->vrs - 1) | ((m->vre - 1) << 16);
geode->regs[DC_FB_ACTIVE] = (m->x - 1) | ((m->y - 1) << 16);
geode->regs[DC_GFX_PITCH] = geode->regs[DC_LINE_SIZE] = (m->x >> 3) * bpp;
for(i=0;i<NumModes;i++)
if(geode_modes[i][1] == m->frequency)
goto modefound;
error("%s: unknown clock value\n", ctlr->name);
modefound:
geode->clock = ((uvlong)geode_modes[i][0] << 32);
ctlr->flag |= Finit;
}
static void
load(Vga* vga, Ctlr* ctlr)
{
Geode *geode;
int i;
geode = vga->private;
wrmsr(0x4C000015, geode->clock);
geode->mmio[DC_UNLOCK] = DC_UNLOCK_VALUE;
for(i=4;i<Nregs;i++) geode->mmio[i] = geode->regs[i];
for(i=1;i<4;i++) geode->mmio[i] = geode->regs[i];
ctlr->flag |= Fload;
}
static void
printreg32(ulong u) {
printreg((u>>24)&0xFF);
printreg((u>>16)&0xFF);
printreg((u>>8)&0xFF);
printreg(u&0xFF);
}
static void
dump(Vga* vga, Ctlr* ctlr)
{
int i;
Geode *geode;
geode = vga->private;
printitem(ctlr->name, "configuration");
for(i=0;i<4;i++) printreg32(geode->regs[i]);
printitem(ctlr->name, "memory");
for(i=4;i<15;i++) printreg32(geode->regs[i]);
printitem(ctlr->name, "timing");
for(i=16;i<24;i++) printreg32(geode->regs[i]);
printitem(ctlr->name, "cursor");
for(i=24;i<28;i++) printreg32(geode->regs[i]);
printitem(ctlr->name, "ext");
printreg(vga->crt[43]);
printreg(vga->crt[44]);
printreg(vga->crt[47]);
printreg(vga->crt[48]);
printitem(ctlr->name, "clock");
printreg32((geode->clock >> 32) & 0xFFFFFFFF);
printreg32(geode->clock & 0xFFFFFFFF);
}
Ctlr geode = {
"geode", /* name */
snarf, /* snarf */
options, /* options */
init, /* init */
load, /* load */
dump, /* dump */
};
Ctlr geodehwgc = {
"geodehwgc",
0,
0,
0,
0,
0,
};