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/* Copyright (c) 2006 Advanced Micro Devices, Inc.
*
* 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.
*
* Neither the name of the Advanced Micro Devices, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
* */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Includes that are used by all drivers */
#include <xf86.h>
#include <xf86_OSproc.h>
#include <compiler.h>
#include "geode.h"
#include <unistd.h>
#include <fcntl.h>
#define DCON_SLEEP_FILE "/sys/devices/platform/dcon/sleep"
#define DCON_FREEZE_FILE "/sys/devices/platform/dcon/freeze"
static Bool
dcon_present(void)
{
static int _dval = -1;
if (_dval == -1)
_dval = (access("/sys/class/power_supply/olpc-ac", F_OK) == 0);
return (Bool) _dval;
}
int
DCONDPMSSet(ScrnInfoPtr pScrni, int mode)
{
static int failed = -1;
ssize_t ret;
int fd;
char value[1];
if (failed == -1)
failed = !dcon_present();
if (failed)
return 0;
/* If the DCON is frozen, don't power it down, it was probably frozen
* for a reason and powering it down would corrupt the display.
* This is needed to avoid losing OLPC's frozen boot image during X
* startup, where DPMS is used to power down and up the display.
* When geode uses KMS this will not be needed as the system realises
* that no mode change is needed and the display power is untouched. */
fd = open(DCON_FREEZE_FILE, O_RDONLY);
if (fd < 0) {
failed = 1;
return 0;
}
ret = read(fd, value, 1);
close(fd);
if (ret == 1) {
if (value[0] == '1')
return 0;
}
fd = open(DCON_SLEEP_FILE, O_WRONLY);
if (fd < 0) {
failed = 1;
return 0;
}
switch (mode) {
case DPMSModeOn:
value[0] = '0';
break;
case DPMSModeStandby:
case DPMSModeSuspend:
case DPMSModeOff:
value[0] = '1';
break;
}
write(fd, value, sizeof(value));
close(fd);
return 1;
}
Bool
dcon_init(ScrnInfoPtr pScrni)
{
GeodeRec *pGeode = GEODEPTR(pScrni);
pGeode->mm_width = 0;
pGeode->mm_height = 0;
if (!dcon_present()) {
xf86DrvMsg(pScrni->scrnIndex, X_DEFAULT, "No DCON is present\n");
return FALSE;
}
pGeode->panelMode = xnfcalloc(1, sizeof(DisplayModeRec));
if (pGeode->panelMode == NULL)
return FALSE;
/* Set up the panel mode structure automagically */
pGeode->panelMode->type = M_T_DRIVER|M_T_PREFERRED;
pGeode->panelMode->Clock = 57275;
pGeode->panelMode->HDisplay = 1200;
pGeode->panelMode->HSyncStart = 1208;
pGeode->panelMode->HSyncEnd = 1216;
pGeode->panelMode->HTotal = 1240;
pGeode->panelMode->VDisplay = 900;
pGeode->panelMode->VSyncStart = 905;
pGeode->panelMode->VSyncEnd = 908;
pGeode->panelMode->VTotal = 912;
pGeode->panelMode->Flags = V_NHSYNC | V_NVSYNC;
pGeode->mm_width = 152;
pGeode->mm_height = 114;
xf86SetModeDefaultName(pGeode->panelMode);
/* TODO: Print board revision once sysfs exports it. */
xf86DrvMsg(pScrni->scrnIndex, X_DEFAULT, "DCON detected.\n");
return TRUE;
}
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