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/* Copyright (c) 2003-2007 Advanced Micro Devices, Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* Neither the name of the Advanced Micro Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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#include "xf86Modes.h"
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#ifdef XSERVER_LIBPCIACCESS
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#include <pciaccess.h>
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/* GPIO Register defines from the CS5536 datasheet */
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#define GPIO_OUT_ENABLE 0x04
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#define GPIO_OUT_AUX1 0x10
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#define GPIO_IN_ENABLE 0x20
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#define GPIO_IN_AUX1 0x34
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/* The DDC pins are defined to be on GPIO pins 3 and 4 */
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#define DDC_SCL_PIN (1 << 3)
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#define DDC_SDA_PIN (1 << 4)
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#define DDC_DATA_HIGH DDC_SDA_PIN
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#define DDC_DATA_LOW (DDC_SDA_PIN << 16)
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#define DDC_CLK_HIGH DDC_SCL_PIN
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#define DDC_CLK_LOW (DDC_SCL_PIN << 16)
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#define CS5536_ISA_DEVICE 0x20901022
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#define CS5535_ISA_DEVICE 0x002b100b
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geode_gpio_iobase(void)
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#ifdef XSERVER_LIBPCIACCESS
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struct pci_device *pci;
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/* The CS5536 GPIO device is always in the same slot: 00:0f.0 */
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/* The CS5535 device should be in same slot as well */
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pci = pci_device_find_by_slot(0, 0, 0xF, 0x0);
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if (pci_device_probe(pci) != 0)
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/* The GPIO I/O address is in resource 1 */
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return (unsigned short) pci->regions[1].base_addr;
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Tag = pciFindFirst(CS5536_ISA_DEVICE, 0xFFFFFFFF);
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if (Tag == PCI_NOT_FOUND) {
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Tag = pciFindFirst(CS5535_ISA_DEVICE, 0xFFFFFFFF);
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if (Tag == PCI_NOT_FOUND)
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/* The GPIO I/O address is in resource 1 */
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return (unsigned short) (pciReadLong(Tag, 0x14) & ~1);
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geode_ddc_putbits(I2CBusPtr b, int scl, int sda)
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unsigned long iobase = (unsigned long) b->DriverPrivate.ptr;
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dat = scl ? DDC_CLK_HIGH : DDC_CLK_LOW;
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dat |= sda ? DDC_DATA_HIGH : DDC_DATA_LOW;
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outl(iobase + GPIO_OUT, dat);
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geode_ddc_getbits(I2CBusPtr b, int *scl, int *sda)
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unsigned long iobase = (unsigned long) b->DriverPrivate.ptr;
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unsigned long dat = inl(iobase + GPIO_IN);
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*scl = (dat & DDC_CLK_HIGH) ? 1 : 0;
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*sda = (dat & DDC_DATA_HIGH) ? 1 : 0;
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GeodeI2CInit(ScrnInfoPtr pScrni, I2CBusPtr * ptr, char *name)
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unsigned int ddciobase;
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ddciobase = geode_gpio_iobase();
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if (ddciobase == 0) {
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xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
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"Could not find the GPIO I/O base\n");
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/* The GPIO pins for DDC are multiplexed with a
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* serial port. If that serial port is enabled, then
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* assume that there is no DDC on the board
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if ((inl(ddciobase + GPIO_IN_AUX1) & DDC_CLK_HIGH) ||
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(inl(ddciobase + GPIO_OUT_AUX1) & DDC_DATA_HIGH)) {
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xf86DrvMsg(pScrni->scrnIndex, X_ERROR,
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"GPIO pins are in serial mode. Assuming no DDC\n");
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outl(ddciobase + GPIO_OUT_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
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outl(ddciobase + GPIO_IN_ENABLE, DDC_DATA_HIGH | DDC_CLK_HIGH);
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bus = xf86CreateI2CBusRec();
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bus->scrnIndex = pScrni->scrnIndex;
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bus->I2CGetBits = geode_ddc_getbits;
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bus->I2CPutBits = geode_ddc_putbits;
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bus->DriverPrivate.ptr = (void *) (unsigned long) (ddciobase);
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if (!xf86I2CBusInit(bus))
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GeodeGetDDC(ScrnInfoPtr pScrni)
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xf86MonPtr mon = NULL;
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if (!GeodeI2CInit(pScrni, &bus, "CS5536 DDC BUS"))
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mon = xf86DoEDID_DDC2(DDC_CALL(pScrni), bus);
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#if (XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC(1,4,99,0,0))
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xf86DDCApplyQuirks(pScrni->scrnIndex, mon);
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xf86DestroyI2CBusRec(bus, FALSE, FALSE);
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GeodeProbeDDC(ScrnInfoPtr pScrni, int index)
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ConfiguredMonitor = GeodeGetDDC(pScrni);
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GeodeDoDDC(ScrnInfoPtr pScrni, int index)
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xf86MonPtr info = NULL;
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info = GeodeGetDDC(pScrni);
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xf86SetDDCproperties(pScrni, info);
added
removed
src/geode_ddc.c
