util/vgabios/pci-userspace.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2016 Google Inc
   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
  16 #include <stdio.h>
  17 #include <pci/pci.h>
  18 #include "pci-userspace.h"
  19
  20 #define DEBUG_PCI 1
  21
  22 static struct pci_access *pacc;
  23
  24 int pci_initialize(void)
  25 {
  26         struct pci_dev *dev;
  27
  28         pacc = pci_alloc();
  29
  30         pci_init(pacc);
  31         pci_scan_bus(pacc);
  32         for (dev = pacc->devices; dev; dev = dev->next) {
  33                 pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES);
  34         }
  35         return 0;
  36 }
  37
  38 int pci_exit(void)
  39 {
  40         pci_cleanup(pacc);
  41         return 0;
  42 }
  43
  44 u8 pci_read_config8(struct device *dev, unsigned int where)
  45 {
  46         struct pci_dev *d;
  47         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  48                 return pci_read_byte(d, where);
  49 #ifdef DEBUG_PCI
  50         printf("PCI: device not found while read byte (%x:%x.%x)\n",
  51                dev->busno, dev->slot, dev->func);
  52 #endif
  53         return 0;
  54 }
  55
  56 u16 pci_read_config16(struct device *dev, unsigned int where)
  57 {
  58         struct pci_dev *d;
  59         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  60                 return pci_read_word(d, where);
  61 #ifdef DEBUG_PCI
  62         printf("PCI: device not found while read word (%x:%x.%x)\n",
  63                dev->busno, dev->slot, dev->func);
  64 #endif
  65         return 0;
  66 }
  67
  68 u32 pci_read_config32(struct device *dev, unsigned int where)
  69 {
  70         struct pci_dev *d;
  71         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  72                 return pci_read_long(d, where);
  73 #ifdef DEBUG_PCI
  74         printf("PCI: device not found while read dword (%x:%x.%x)\n",
  75                dev->busno, dev->slot, dev->func);
  76 #endif
  77         return 0;
  78 }
  79
  80 void pci_write_config8(struct device *dev, unsigned int where, u8 val)
  81 {
  82         struct pci_dev *d;
  83         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  84                 pci_write_byte(d, where, val);
  85 #ifdef DEBUG_PCI
  86         else
  87                 printf("PCI: device not found while write byte (%x:%x.%x)\n",
  88                        dev->busno, dev->slot, dev->func);
  89 #endif
  90 }
  91
  92 void pci_write_config16(struct device *dev, unsigned int where, u16 val)
  93 {
  94         struct pci_dev *d;
  95         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  96                 pci_write_word(d, where, val);
  97 #ifdef DEBUG_PCI
  98         else
  99                 printf("PCI: device not found while write word (%x:%x.%x)\n",
 100                        dev->busno, dev->slot, dev->func);
 101 #endif
 102 }
 103
 104 void pci_write_config32(struct device *dev, unsigned int where, u32 val)
 105 {
 106         struct pci_dev *d;
 107         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
 108                 pci_write_long(d, where, val);
 109 #ifdef DEBUG_PCI
 110         else
 111                 printf("PCI: device not found while write dword (%x:%x.%x)\n",
 112                        dev->busno, dev->slot, dev->func);
 113 #endif
 114 }