diff options
Diffstat (limited to 'src/device/pci_ops.c')
-rw-r--r-- | src/device/pci_ops.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/device/pci_ops.c b/src/device/pci_ops.c new file mode 100644 index 0000000000..07da30034f --- /dev/null +++ b/src/device/pci_ops.c @@ -0,0 +1,149 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2004 Linux Networx + * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) + * Copyright (C) 2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/pciconf.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> + +/* + * The only consumer of the return value of get_pbus() is ops_pci_bus(). + * ops_pci_bus() can handle being passed NULL and auto-picks working ops. + */ +static struct bus *get_pbus(device_t dev) +{ + struct bus *pbus = NULL; + + if (!dev) + die("get_pbus: dev is NULL!\n"); + else + pbus = dev->bus; + + while (pbus && pbus->dev && !ops_pci_bus(pbus)) { + if (pbus == pbus->dev->bus) { + printk(BIOS_ALERT, "%s in endless loop looking for a " + "parent bus with ops_pci_bus for %s, breaking " + "out.\n", __func__, dev_path(dev)); + break; + } + pbus = pbus->dev->bus; + } + + if (!pbus || !pbus->dev || !pbus->dev->ops + || !pbus->dev->ops->ops_pci_bus) { + /* This can happen before the device tree is fully set up. */ + + // printk(BIOS_EMERG, "%s: Cannot find PCI bus operations.\n", + // dev_path(dev)); + + pbus = NULL; + } + + return pbus; +} + +u8 pci_read_config8(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return ops_pci_bus(pbus)->read8(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +u16 pci_read_config16(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return ops_pci_bus(pbus)->read16(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +u32 pci_read_config32(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return ops_pci_bus(pbus)->read32(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +void pci_write_config8(device_t dev, unsigned int where, u8 val) +{ + struct bus *pbus = get_pbus(dev); + ops_pci_bus(pbus)->write8(pbus, dev->bus->secondary, + dev->path.pci.devfn, where, val); +} + +void pci_write_config16(device_t dev, unsigned int where, u16 val) +{ + struct bus *pbus = get_pbus(dev); + ops_pci_bus(pbus)->write16(pbus, dev->bus->secondary, + dev->path.pci.devfn, where, val); +} + +void pci_write_config32(device_t dev, unsigned int where, u32 val) +{ + struct bus *pbus = get_pbus(dev); + ops_pci_bus(pbus)->write32(pbus, dev->bus->secondary, + dev->path.pci.devfn, where, val); +} + +#if CONFIG_MMCONF_SUPPORT +u8 pci_mmio_read_config8(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return pci_ops_mmconf.read8(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +u16 pci_mmio_read_config16(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return pci_ops_mmconf.read16(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +u32 pci_mmio_read_config32(device_t dev, unsigned int where) +{ + struct bus *pbus = get_pbus(dev); + return pci_ops_mmconf.read32(pbus, dev->bus->secondary, + dev->path.pci.devfn, where); +} + +void pci_mmio_write_config8(device_t dev, unsigned int where, u8 val) +{ + struct bus *pbus = get_pbus(dev); + pci_ops_mmconf.write8(pbus, dev->bus->secondary, dev->path.pci.devfn, + where, val); +} + +void pci_mmio_write_config16(device_t dev, unsigned int where, u16 val) +{ + struct bus *pbus = get_pbus(dev); + pci_ops_mmconf.write16(pbus, dev->bus->secondary, dev->path.pci.devfn, + where, val); +} + +void pci_mmio_write_config32(device_t dev, unsigned int where, u32 val) +{ + struct bus *pbus = get_pbus(dev); + pci_ops_mmconf.write32(pbus, dev->bus->secondary, dev->path.pci.devfn, + where, val); +} + +#endif |