src/northbridge/intel/sch/gma.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2008-2009 coresystems GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc.
  18  */
  19
  20 #include <console/console.h>
  21 #include <device/device.h>
  22 #include <device/pci.h>
  23 #include <device/pci_ids.h>
  24 #include <drivers/intel/gma/i915.h>
  25 #include "chip.h"
  26
  27 static void gma_func0_init(struct device *dev)
  28 {
  29         u32 reg32;
  30
  31         /* IGD needs to be bus master. */
  32         reg32 = pci_read_config32(dev, PCI_COMMAND);
  33         pci_write_config32(dev, PCI_COMMAND, reg32 | PCI_COMMAND_MASTER);
  34
  35         pci_dev_init(dev);
  36 }
  37
  38 static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device)
  39 {
  40         if (!vendor || !device) {
  41                 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
  42                                    pci_read_config32(dev, PCI_VENDOR_ID));
  43         } else {
  44                 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
  45                         ((device & 0xffff) << 16) | (vendor & 0xffff));
  46         }
  47 }
  48
  49 const struct i915_gpu_controller_info *
  50 intel_gma_get_controller_info(void)
  51 {
  52         device_t dev = dev_find_slot(0, PCI_DEVFN(0x2,0));
  53         if (!dev) {
  54                 return NULL;
  55         }
  56         struct northbridge_intel_sch_config *chip = dev->chip_info;
  57         return &chip->gfx;
  58 }
  59
  60 static void gma_ssdt(void)
  61 {
  62         const struct i915_gpu_controller_info *gfx = intel_gma_get_controller_info();
  63         if (!gfx) {
  64                 return;
  65         }
  66
  67         drivers_intel_gma_displays_ssdt_generate(gfx);
  68 }
  69
  70 static struct pci_operations gma_pci_ops = {
  71         .set_subsystem = gma_set_subsystem,
  72 };
  73
  74 static struct device_operations gma_func0_ops = {
  75         .read_resources         = pci_dev_read_resources,
  76         .set_resources          = pci_dev_set_resources,
  77         .enable_resources       = pci_dev_enable_resources,
  78         .acpi_fill_ssdt_generator = gma_ssdt,
  79         .init                   = gma_func0_init,
  80         .scan_bus               = 0,
  81         .enable                 = 0,
  82         .ops_pci                = &gma_pci_ops,
  83 };
  84
  85 static const struct pci_driver sch_gma_func0_driver __pci_driver = {
  86         .ops    = &gma_func0_ops,
  87         .vendor = PCI_VENDOR_ID_INTEL,
  88         .device = 0x8108,
  89 };