2 * This file is part of the coreboot project.
4 * Copyright (C) 2004 Linux Networx
5 * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
6 * Copyright (C) 2009 coresystems GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <console/console.h>
23 #include <arch/pciconf.h>
24 #include <device/pci.h>
25 #include <device/pci_ids.h>
26 #include <device/pci_ops.h>
29 * The only consumer of the return value of get_pbus() is ops_pci_bus().
30 * ops_pci_bus() can handle being passed NULL and auto-picks working ops.
32 static struct bus *get_pbus(device_t dev)
34 struct bus *pbus = NULL;
37 die("get_pbus: dev is NULL!\n");
41 while(pbus && pbus->dev && !ops_pci_bus(pbus)) {
42 if (pbus == pbus->dev->bus) {
43 printk(BIOS_ALERT, "%s in endless loop looking for a parent "
44 "bus with ops_pci_bus for %s, breaking out.\n",
45 __func__, dev_path(dev));
48 pbus = pbus->dev->bus;
50 if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_pci_bus) {
51 /* This can happen before the device tree is set up completely. */
52 //printk(BIOS_EMERG, "%s: Cannot find pci bus operations.\n", dev_path(dev));
58 uint8_t pci_read_config8(device_t dev, unsigned where)
60 struct bus *pbus = get_pbus(dev);
61 return ops_pci_bus(pbus)->read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
64 uint16_t pci_read_config16(device_t dev, unsigned where)
66 struct bus *pbus = get_pbus(dev);
67 return ops_pci_bus(pbus)->read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
70 uint32_t pci_read_config32(device_t dev, unsigned where)
72 struct bus *pbus = get_pbus(dev);
73 return ops_pci_bus(pbus)->read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
76 void pci_write_config8(device_t dev, unsigned where, uint8_t val)
78 struct bus *pbus = get_pbus(dev);
79 ops_pci_bus(pbus)->write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
82 void pci_write_config16(device_t dev, unsigned where, uint16_t val)
84 struct bus *pbus = get_pbus(dev);
85 ops_pci_bus(pbus)->write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
88 void pci_write_config32(device_t dev, unsigned where, uint32_t val)
90 struct bus *pbus = get_pbus(dev);
91 ops_pci_bus(pbus)->write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
94 #if CONFIG_MMCONF_SUPPORT
95 uint8_t pci_mmio_read_config8(device_t dev, unsigned where)
97 struct bus *pbus = get_pbus(dev);
98 return pci_ops_mmconf.read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
101 uint16_t pci_mmio_read_config16(device_t dev, unsigned where)
103 struct bus *pbus = get_pbus(dev);
104 return pci_ops_mmconf.read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
107 uint32_t pci_mmio_read_config32(device_t dev, unsigned where)
109 struct bus *pbus = get_pbus(dev);
110 return pci_ops_mmconf.read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
113 void pci_mmio_write_config8(device_t dev, unsigned where, uint8_t val)
115 struct bus *pbus = get_pbus(dev);
116 pci_ops_mmconf.write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
119 void pci_mmio_write_config16(device_t dev, unsigned where, uint16_t val)
121 struct bus *pbus = get_pbus(dev);
122 pci_ops_mmconf.write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
125 void pci_mmio_write_config32(device_t dev, unsigned where, uint32_t val)
127 struct bus *pbus = get_pbus(dev);
128 pci_ops_mmconf.write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);