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/* Copyright (c) 2003-2007 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
#include "xf86.h"
#include "xf86Modes.h"
#include "compiler.h"
#include "geode.h"
#ifdef XSERVER_LIBPCIACCESS
#include <pciaccess.h>
#endif
/* GPIO Register defines from the CS5536 datasheet */
#define GPIO_OUT 0x00
#define GPIO_OUT_ENABLE 0x04
#define GPIO_OUT_AUX1 0x10
#define GPIO_IN_ENABLE 0x20
#define GPIO_IN 0x30
#define GPIO_IN_AUX1 0x34
/* The DDC pins are defined to be on GPIO pins 3 and 4 */
#define DDC_SCL_PIN (1 << 3)
#define DDC_SDA_PIN (1 << 4)
#define DDC_DATA_HIGH DDC_SDA_PIN
#define DDC_DATA_LOW (DDC_SDA_PIN << 16)
#define DDC_CLK_HIGH DDC_SCL_PIN
#define DDC_CLK_LOW (DDC_SCL_PIN << 16)
#define CS5536_ISA_DEVICE 0x20901022
#define CS5535_ISA_DEVICE 0x002b100b
static unsigned short
geode_gpio_iobase(void)
{
#ifdef XSERVER_LIBPCIACCESS
struct pci_device *pci;
/* The CS5536 GPIO device is always in the same slot: 00:0f.0 */
/* The CS5535 device should be in same slot as well */
pci = pci_device_find_by_slot(0, 0, 0xF, 0x0);
if (pci == NULL)
return 0;
if (pci_device_probe(pci) != 0)
return 0;
/* The GPIO I/O address is in resource 1 */
return (unsigned short) pci->regions[1].base_addr;
#else
PCITAG Tag;
Tag = pciFindFirst(CS5536_ISA_DEVICE, 0xFFFFFFFF);
if (Tag == PCI_NOT_FOUND) {
Tag = pciFindFirst(CS5535_ISA_DEVICE, 0xFFFFFFFF);
if (Tag == PCI_NOT_FOUND)
return 0;
}
/* The GPIO I/O address is in resource 1 */
return (unsigned short) (pciReadLong(Tag, 0x14) & ~1);
#endif
}
static void
geode_ddc_putbits(I2CBusPtr b, int scl, int sda)
{
unsigned long iobase = (unsigned long) b->DriverPrivate.ptr;
unsigned long dat;
dat = scl ? DDC_CLK_HIGH : DDC_CLK_LOW;
dat |= sda ? DDC_DATA_HIGH : DDC_DATA_LOW;
outl(iobase + GPIO_OUT, dat);
}
static void
geode_ddc_getbits(I2CBusPtr b, int *scl, int *sda)
{
unsigned long iobase = (unsigned long) b->DriverPrivate.ptr;
unsigned long dat = inl(iobase + GPIO_IN);
*scl = (dat & DDC_CLK_HIGH) ? 1 : 0;
*sda = (dat & DDC_DATA_HIGH) ? 1 : 0;
}
Bool
GeodeI2CInit(ScrnInfoPtr pScrni, I2CBusPtr * ptr, const char *name)
{
I2CBusPtr bus;
unsigned int ddciobase;
ddciobase = geode_gpio_iobase();
if (ddciobase == 0) {
xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
"Could not find the GPIO I/O base\n");
return FALSE;
}
/* The GPIO pins for DDC are multiplexed with a
* serial port. If that serial port is enabled, then
* assume that there is no DDC on the board
*/
if ((inl(ddciobase + GPIO_IN_AUX1) & DDC_CLK_HIGH) ||
(inl(ddciobase + GPIO_OUT_AUX1) & DDC_DATA_HIGH)) {
xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
"GPIO pins are in serial mode. Assuming no DDC\n");
return FALSE;
}
outl(ddciobase + GPIO_OUT_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
outl(ddciobase + GPIO_IN_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
bus = xf86CreateI2CBusRec();
if (!bus)
return FALSE;
bus->BusName = (char *)name;
bus->scrnIndex = pScrni->scrnIndex;
bus->I2CGetBits = geode_ddc_getbits;
bus->I2CPutBits = geode_ddc_putbits;
bus->DriverPrivate.ptr = (void *) (unsigned long) (ddciobase);
if (!xf86I2CBusInit(bus))
return FALSE;
*ptr = bus;
return TRUE;
}
static xf86MonPtr
GeodeGetDDC(ScrnInfoPtr pScrni)
{
xf86MonPtr mon = NULL;
I2CBusPtr bus;
if (!GeodeI2CInit(pScrni, &bus, "CS5536 DDC BUS"))
return NULL;
mon = xf86DoEDID_DDC2(pScrni, bus);
if (mon)
xf86DDCApplyQuirks(pScrni->scrnIndex, mon);
xf86DestroyI2CBusRec(bus, FALSE, FALSE);
return mon;
}
void
GeodeProbeDDC(ScrnInfoPtr pScrni, int index)
{
ConfiguredMonitor = GeodeGetDDC(pScrni);
}
xf86MonPtr
GeodeDoDDC(ScrnInfoPtr pScrni, int index)
{
xf86MonPtr info = NULL;
info = GeodeGetDDC(pScrni);
xf86PrintEDID(info);
xf86SetDDCproperties(pScrni, info);
return info;
}
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