src/soc/intel/braswell/gfx.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "chip.h"
  16 #include <console/console.h>
  17 #include <device/device.h>
  18 #include <device/pci.h>
  19 #include <device/pci_ids.h>
  20 #include <drivers/intel/gma/opregion.h>
  21 #include <reg_script.h>
  22 #include <soc/gfx.h>
  23 #include <soc/nvs.h>
  24 #include <soc/pci_devs.h>
  25 #include <soc/ramstage.h>
  26
  27 static const struct reg_script gpu_pre_vbios_script[] = {
  28         /* Make sure GFX is bus master with MMIO access */
  29         REG_PCI_OR32(PCI_COMMAND, PCI_COMMAND_MASTER|PCI_COMMAND_MEMORY),
  30         REG_SCRIPT_END
  31 };
  32
  33 static const struct reg_script gfx_post_vbios_script[] = {
  34         /* Set Lock bits */
  35         REG_PCI_RMW32(GGC, 0xffffffff, GGC_GGCLCK),
  36         REG_PCI_RMW32(GSM_BASE, 0xffffffff, GSM_BDSM_LOCK),
  37         REG_PCI_RMW32(GTT_BASE, 0xffffffff, GTT_BGSM_LOCK),
  38         REG_SCRIPT_END
  39 };
  40
  41 static inline void gfx_run_script(struct device *dev,
  42                                   const struct reg_script *ops)
  43 {
  44         reg_script_run_on_dev(dev, ops);
  45 }
  46
  47 static void gfx_pre_vbios_init(struct device *dev)
  48 {
  49         printk(BIOS_SPEW, "%s/%s (%s)\n",
  50                         __FILE__, __func__, dev_name(dev));
  51         printk(BIOS_INFO, "GFX: Pre VBIOS Init\n");
  52         gfx_run_script(dev, gpu_pre_vbios_script);
  53 }
  54
  55 static void gfx_post_vbios_init(struct device *dev)
  56 {
  57         printk(BIOS_SPEW, "%s/%s (%s)\n",
  58                         __FILE__, __func__, dev_name(dev));
  59         printk(BIOS_INFO, "GFX: Post VBIOS Init\n");
  60         gfx_run_script(dev, gfx_post_vbios_script);
  61 }
  62
  63 static void gfx_init(struct device *dev)
  64 {
  65         printk(BIOS_SPEW, "%s/%s (%s)\n",
  66                         __FILE__, __func__, dev_name(dev));
  67
  68         if (!CONFIG(RUN_FSP_GOP)) {
  69                 /* Pre VBIOS Init */
  70                 gfx_pre_vbios_init(dev);
  71
  72                 /* Run VBIOS */
  73                 pci_dev_init(dev);
  74
  75                 /* Post VBIOS Init */
  76                 gfx_post_vbios_init(dev);
  77         }
  78         intel_gma_restore_opregion();
  79 }
  80
  81 uintptr_t gma_get_gnvs_aslb(const void *gnvs)
  82 {
  83         const global_nvs_t *gnvs_ptr = gnvs;
  84         return (uintptr_t)(gnvs_ptr ? gnvs_ptr->aslb : 0);
  85 }
  86
  87 void gma_set_gnvs_aslb(void *gnvs, uintptr_t aslb)
  88 {
  89         global_nvs_t *gnvs_ptr = gnvs;
  90         if (gnvs_ptr)
  91                 gnvs_ptr->aslb = aslb;
  92 }
  93
  94 static struct device_operations gfx_device_ops = {
  95         .read_resources         = pci_dev_read_resources,
  96         .set_resources          = pci_dev_set_resources,
  97         .enable_resources       = pci_dev_enable_resources,
  98         .init                   = gfx_init,
  99         .ops_pci                = &soc_pci_ops,
 100 };
 101
 102 static const struct pci_driver gfx_driver __pci_driver = {
 103         .ops    = &gfx_device_ops,
 104         .vendor = PCI_VENDOR_ID_INTEL,
 105         .device = GFX_DEVID,
 106 };