util/vgabios/pci-userspace.c

   1 /* This file is part of the coreboot project. */
   2 /*
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; version 2 of the License.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12
  13 #include <stdio.h>
  14 #include <pci/pci.h>
  15 #include "pci-userspace.h"
  16
  17 #define DEBUG_PCI 1
  18
  19 static struct pci_access *pacc;
  20
  21 int pci_initialize(void)
  22 {
  23         struct pci_dev *dev;
  24
  25         pacc = pci_alloc();
  26
  27         pci_init(pacc);
  28         pci_scan_bus(pacc);
  29         for (dev = pacc->devices; dev; dev = dev->next) {
  30                 pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES);
  31         }
  32         return 0;
  33 }
  34
  35 int pci_exit(void)
  36 {
  37         pci_cleanup(pacc);
  38         return 0;
  39 }
  40
  41 u8 pci_read_config8(struct device *dev, unsigned int where)
  42 {
  43         struct pci_dev *d;
  44         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  45                 return pci_read_byte(d, where);
  46 #ifdef DEBUG_PCI
  47         printf("PCI: device not found while read byte (%x:%x.%x)\n",
  48                dev->busno, dev->slot, dev->func);
  49 #endif
  50         return 0;
  51 }
  52
  53 u16 pci_read_config16(struct device *dev, unsigned int where)
  54 {
  55         struct pci_dev *d;
  56         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  57                 return pci_read_word(d, where);
  58 #ifdef DEBUG_PCI
  59         printf("PCI: device not found while read word (%x:%x.%x)\n",
  60                dev->busno, dev->slot, dev->func);
  61 #endif
  62         return 0;
  63 }
  64
  65 u32 pci_read_config32(struct device *dev, unsigned int where)
  66 {
  67         struct pci_dev *d;
  68         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  69                 return pci_read_long(d, where);
  70 #ifdef DEBUG_PCI
  71         printf("PCI: device not found while read dword (%x:%x.%x)\n",
  72                dev->busno, dev->slot, dev->func);
  73 #endif
  74         return 0;
  75 }
  76
  77 void pci_write_config8(struct device *dev, unsigned int where, u8 val)
  78 {
  79         struct pci_dev *d;
  80         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  81                 pci_write_byte(d, where, val);
  82 #ifdef DEBUG_PCI
  83         else
  84                 printf("PCI: device not found while write byte (%x:%x.%x)\n",
  85                        dev->busno, dev->slot, dev->func);
  86 #endif
  87 }
  88
  89 void pci_write_config16(struct device *dev, unsigned int where, u16 val)
  90 {
  91         struct pci_dev *d;
  92         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
  93                 pci_write_word(d, where, val);
  94 #ifdef DEBUG_PCI
  95         else
  96                 printf("PCI: device not found while write word (%x:%x.%x)\n",
  97                        dev->busno, dev->slot, dev->func);
  98 #endif
  99 }
 100
 101 void pci_write_config32(struct device *dev, unsigned int where, u32 val)
 102 {
 103         struct pci_dev *d;
 104         if ((d = pci_get_dev(pacc, 0, dev->busno, dev->slot, dev->func)))
 105                 pci_write_long(d, where, val);
 106 #ifdef DEBUG_PCI
 107         else
 108                 printf("PCI: device not found while write dword (%x:%x.%x)\n",
 109                        dev->busno, dev->slot, dev->func);
 110 #endif
 111 }