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>
28 /* The only consumer of the return value of get_pbus() is ops_pci_bus().
29 * ops_pci_bus() can handle being passed NULL and auto-picks working ops.
31 static struct bus *get_pbus(device_t dev)
33 struct bus *pbus = NULL;
36 die("get_pbus: dev is NULL!\n");
40 while(pbus && pbus->dev && !ops_pci_bus(pbus)) {
41 if (pbus == pbus->dev->bus) {
42 printk(BIOS_ALERT, "%s in endless loop looking for a parent "
43 "bus with ops_pci_bus for %s, breaking out.\n",
44 __func__, dev_path(dev));
47 pbus = pbus->dev->bus;
49 if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_pci_bus) {
50 /* This can happen before the device tree is set up completely. */
51 //printk(BIOS_EMERG, "%s: Cannot find pci bus operations.\n", dev_path(dev));
57 uint8_t pci_read_config8(device_t dev, unsigned where)
59 struct bus *pbus = get_pbus(dev);
60 return ops_pci_bus(pbus)->read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
63 uint16_t pci_read_config16(device_t dev, unsigned where)
65 struct bus *pbus = get_pbus(dev);
66 return ops_pci_bus(pbus)->read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
69 uint32_t pci_read_config32(device_t dev, unsigned where)
71 struct bus *pbus = get_pbus(dev);
72 return ops_pci_bus(pbus)->read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
75 void pci_write_config8(device_t dev, unsigned where, uint8_t val)
77 struct bus *pbus = get_pbus(dev);
78 ops_pci_bus(pbus)->write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
81 void pci_write_config16(device_t dev, unsigned where, uint16_t val)
83 struct bus *pbus = get_pbus(dev);
84 ops_pci_bus(pbus)->write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
87 void pci_write_config32(device_t dev, unsigned where, uint32_t val)
89 struct bus *pbus = get_pbus(dev);
90 ops_pci_bus(pbus)->write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
93 #if CONFIG_MMCONF_SUPPORT
94 uint8_t pci_mmio_read_config8(device_t dev, unsigned where)
96 struct bus *pbus = get_pbus(dev);
97 return pci_ops_mmconf.read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
100 uint16_t pci_mmio_read_config16(device_t dev, unsigned where)
102 struct bus *pbus = get_pbus(dev);
103 return pci_ops_mmconf.read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
106 uint32_t pci_mmio_read_config32(device_t dev, unsigned where)
108 struct bus *pbus = get_pbus(dev);
109 return pci_ops_mmconf.read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
112 void pci_mmio_write_config8(device_t dev, unsigned where, uint8_t val)
114 struct bus *pbus = get_pbus(dev);
115 pci_ops_mmconf.write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
118 void pci_mmio_write_config16(device_t dev, unsigned where, uint16_t val)
120 struct bus *pbus = get_pbus(dev);
121 pci_ops_mmconf.write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
124 void pci_mmio_write_config32(device_t dev, unsigned where, uint32_t val)
126 struct bus *pbus = get_pbus(dev);
127 pci_ops_mmconf.write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);