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/*
* Copyright (c) 2007 NVIDIA, Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <strings.h>
#include <xf86DDC.h>
#include "g80_type.h"
#include "g80_ddc.h"
static Bool G80ReadPortMapping(int scrnIndex, G80Ptr pNv)
{
unsigned char *table2;
unsigned char headerSize, entries;
int i;
CARD16 a;
CARD32 b;
/* Clear the i2c map to invalid */
for(i = 0; i < 4; i++)
pNv->i2cMap[i].dac = pNv->i2cMap[i].sor = -1;
if(*(CARD16*)pNv->table1 != 0xaa55) goto fail;
a = *(CARD16*)(pNv->table1 + 0x36);
table2 = (unsigned char*)pNv->table1 + a;
if(table2[0] != 0x40) goto fail;
b = *(CARD32*)(table2 + 6);
if(b != 0x4edcbdcb) goto fail;
headerSize = table2[1];
entries = table2[2];
for(i = 0; i < entries; i++) {
CARD32 type, port;
ORNum or;
b = *(CARD32*)&table2[headerSize + 8*i];
type = b & 0xf;
port = (b >> 4) & 0xf;
or = ffs((b >> 24) & 0xf) - 1;
if(type < 4 && port != 0xf) {
switch(type) {
case 0: /* CRT */
case 1: /* TV */
if(pNv->i2cMap[port].dac != -1) {
xf86DrvMsg(scrnIndex, X_WARNING,
"DDC routing table corrupt! DAC %i -> %i "
"for port %i\n",
or, pNv->i2cMap[port].dac, port);
}
pNv->i2cMap[port].dac = or;
break;
case 2: /* TMDS */
case 3: /* LVDS */
if(pNv->i2cMap[port].sor != -1)
xf86DrvMsg(scrnIndex, X_WARNING,
"DDC routing table corrupt! SOR %i -> %i "
"for port %i\n",
or, pNv->i2cMap[port].sor, port);
pNv->i2cMap[port].sor = or;
break;
}
}
}
xf86DrvMsg(scrnIndex, X_PROBED, "I2C map:\n");
for(i = 0; i < 4; i++) {
if(pNv->i2cMap[i].dac != -1)
xf86DrvMsg(scrnIndex, X_PROBED, " Bus %i -> DAC%i\n", i, pNv->i2cMap[i].dac);
if(pNv->i2cMap[i].sor != -1)
xf86DrvMsg(scrnIndex, X_PROBED, " Bus %i -> SOR%i\n", i, pNv->i2cMap[i].sor);
}
return TRUE;
fail:
xf86DrvMsg(scrnIndex, X_ERROR, "Couldn't find the DDC routing table. "
"Mode setting will probably fail!\n");
return FALSE;
}
static void G80_I2CPutBits(I2CBusPtr b, int clock, int data)
{
G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
const int off = b->DriverPrivate.val;
pNv->reg[(0x0000E138+off)/4] = 4 | clock | data << 1;
}
static void G80_I2CGetBits(I2CBusPtr b, int *clock, int *data)
{
G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
const int off = b->DriverPrivate.val;
unsigned char val;
val = pNv->reg[(0x0000E138+off)/4];
*clock = !!(val & 1);
*data = !!(val & 2);
}
static xf86MonPtr G80ProbeDDCBus(ScrnInfoPtr pScrn, int bus)
{
G80Ptr pNv = G80PTR(pScrn);
I2CBusPtr i2c;
xf86MonPtr monInfo = NULL;
const int off = bus * 0x18;
/* Allocate the I2C bus structure */
i2c = xf86CreateI2CBusRec();
if(!i2c) return NULL;
i2c->BusName = "DDC";
i2c->scrnIndex = pScrn->scrnIndex;
i2c->I2CPutBits = G80_I2CPutBits;
i2c->I2CGetBits = G80_I2CGetBits;
i2c->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */
i2c->StartTimeout = 550;
i2c->BitTimeout = 40;
i2c->ByteTimeout = 40;
i2c->AcknTimeout = 40;
i2c->DriverPrivate.val = off;
if(!xf86I2CBusInit(i2c)) goto done;
pNv->reg[(0x0000E138+off)/4] = 7;
xf86DrvMsg(pScrn->scrnIndex, X_INFO,
"Probing for EDID on I2C bus %i...\n", bus);
monInfo = xf86DoEDID_DDC2(pScrn->scrnIndex, i2c);
pNv->reg[(0x0000E138+off)/4] = 3;
if(monInfo) {
xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
"DDC detected a %s:\n", monInfo->features.input_type ?
"DFP" : "CRT");
xf86PrintEDID(monInfo);
} else {
xf86DrvMsg(pScrn->scrnIndex, X_INFO, " ... none found\n");
}
done:
xf86DestroyI2CBusRec(i2c, TRUE, TRUE);
return monInfo;
}
/*
* Try DDC on each bus until we find one that works.
*/
Bool G80ProbeDDC(ScrnInfoPtr pScrn)
{
G80Ptr pNv = G80PTR(pScrn);
xf86MonPtr monInfo;
int port;
Bool flatPanel;
if(!G80ReadPortMapping(pScrn->scrnIndex, pNv))
return FALSE;
for(port = 0; port < 4; port++) {
if(pNv->i2cMap[port].dac == -1 && pNv->i2cMap[port].sor == -1)
/* No outputs on this port. Skip it. */
continue;
monInfo = G80ProbeDDCBus(pScrn, port);
if(!monInfo)
/* No EDID on this port. */
continue;
flatPanel = (monInfo->features.input_type == 1);
if(pNv->i2cMap[port].dac != -1 &&
G80DispDetectLoad(pScrn, pNv->i2cMap[port].dac)) {
pNv->orType = DAC;
pNv->or = pNv->i2cMap[port].dac;
} else if(pNv->i2cMap[port].sor != -1) {
pNv->orType = SOR;
pNv->or = pNv->i2cMap[port].sor;
} else {
xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
"Saw an EDID on I2C port %i but no DAC load was "
"detected and no SOR is connected to this port. Using "
"DAC%i.\n", port,
pNv->or);
pNv->orType = DAC;
pNv->or = pNv->i2cMap[port].dac;
}
xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
"Found a %s on I2C port %i, assigning %s%i\n",
flatPanel ? "flat panel" : "CRT",
port, pNv->orType == SOR ? "SOR" : "DAC", pNv->or);
pScrn->monitor->DDC = monInfo;
xf86SetDDCproperties(pScrn, monInfo);
return TRUE;
}
return FALSE;
}
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