Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6587
-gerrit
commit be2ccff8471e0a0abeaf868a467afa090ed07348 Author: Vladimir Serbinenko phcoder@gmail.com Date: Sun Aug 10 23:48:11 2014 +0200
gm45: Ensure that brightness register in gma contains sane value.
Change-Id: Ia66c71c3adf2ae0d413750b5e59e3eaba3888a0b Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/northbridge/intel/gm45/Makefile.inc | 1 + src/northbridge/intel/gm45/gma.c | 98 +++++++++++++++++++++++++++++++++ 2 files changed, 99 insertions(+)
diff --git a/src/northbridge/intel/gm45/Makefile.inc b/src/northbridge/intel/gm45/Makefile.inc index 01cf855..5caa8af 100644 --- a/src/northbridge/intel/gm45/Makefile.inc +++ b/src/northbridge/intel/gm45/Makefile.inc @@ -35,5 +35,6 @@ ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c
ramstage-y += ram_calc.c ramstage-y += northbridge.c +ramstage-y += gma.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += delay.c diff --git a/src/northbridge/intel/gm45/gma.c b/src/northbridge/intel/gm45/gma.c new file mode 100644 index 0000000..60cafab --- /dev/null +++ b/src/northbridge/intel/gm45/gma.c @@ -0,0 +1,98 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Chromium OS Authors + * Copyright (C) 2013 Vladimir Serbinenko + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <console/console.h> +#include <delay.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <string.h> +#include <device/pci_ops.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/mtrr.h> + +#include "chip.h" +#include "gm45.h" + +static struct resource *gtt_res = NULL; + +static inline void gtt_write(u32 reg, u32 data) +{ + write32(gtt_res->base + reg, data); +} + +static void gma_func0_init(struct device *dev) +{ + u32 reg32; + + /* IGD needs to be Bus Master */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO; + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Init graphics power management */ + gtt_res = find_resource(dev, PCI_BASE_ADDRESS_0); + + /* PCI Init, will run VBIOS */ + pci_dev_init(dev); + + /* Post VBIOS init */ + /* Enable Backlight */ + gtt_write(0x61250, (1 << 31)); + gtt_write(0x61254, 0x06100610); +} + +static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + if (!vendor || !device) { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_read_config32(dev, PCI_VENDOR_ID)); + } else { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & + 0xffff)); + } +} + +static struct pci_operations gma_pci_ops = { + .set_subsystem = gma_set_subsystem, +}; + +static struct device_operations gma_func0_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = gma_func0_init, + .scan_bus = 0, + .enable = 0, + .ops_pci = &gma_pci_ops, +}; + +static const unsigned short pci_device_ids[] = +{ + 0x2a42, 0 +}; + +static const struct pci_driver gma __pci_driver = { + .ops = &gma_func0_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = pci_device_ids, +};