blob: 0d883a2829637f86af4350eeec00092e81b88ca7 [file] [log] [blame]
// PCI config space access functions.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "pci.h" // PCIDevice
#include "ioport.h" // outl
#include "util.h" // dprintf
#include "config.h" // CONFIG_*
#include "pci_regs.h" // PCI_VENDOR_ID
void pci_config_writel(PCIDevice d, u32 addr, u32 val)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
outl(val, PORT_PCI_DATA);
}
void pci_config_writew(PCIDevice d, u32 addr, u16 val)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
outw(val, PORT_PCI_DATA + (addr & 2));
}
void pci_config_writeb(PCIDevice d, u32 addr, u8 val)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
outb(val, PORT_PCI_DATA + (addr & 3));
}
u32 pci_config_readl(PCIDevice d, u32 addr)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
return inl(PORT_PCI_DATA);
}
u16 pci_config_readw(PCIDevice d, u32 addr)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
return inw(PORT_PCI_DATA + (addr & 2));
}
u8 pci_config_readb(PCIDevice d, u32 addr)
{
outl(0x80000000 | (d.bus << 16) | (d.devfn << 8) | (addr & 0xfc)
, PORT_PCI_CMD);
return inb(PORT_PCI_DATA + (addr & 3));
}
int
pci_find_device(u16 vendid, u16 devid, int index, PCIDevice *dev)
{
int devfn, bus;
u32 id = (devid << 16) | vendid;
for (bus=0; bus < CONFIG_PCI_BUS_COUNT; bus++) {
for (devfn=0; devfn<0x100; devfn++) {
PCIDevice d = pci_bd(bus, devfn);
u32 v = pci_config_readl(d, PCI_VENDOR_ID);
if (v != id)
continue;
if (index) {
index--;
continue;
}
// Found it.
*dev = d;
return 0;
}
}
return -1;
}
// Search for a device with the specified class id and prog-if.
int
pci_find_classprog(u32 classprog, int index, PCIDevice *dev)
{
int devfn, bus;
for (bus=0; bus < CONFIG_PCI_BUS_COUNT; bus++) {
for (devfn=0; devfn<0x100; devfn++) {
PCIDevice d = pci_bd(bus, devfn);
u32 v = pci_config_readl(d, 0x08);
if ((v>>8) != classprog)
continue;
if (index) {
index--;
continue;
}
// Found it.
*dev = d;
return 0;
}
}
return -1;
}
// Search for a device with the specified class id.
int
pci_find_class(u16 classid, int index, PCIDevice *dev)
{
int devfn, bus;
for (bus=0; bus < CONFIG_PCI_BUS_COUNT; bus++) {
for (devfn=0; devfn<0x100; devfn++) {
PCIDevice d = pci_bd(bus, devfn);
u16 v = pci_config_readw(d, PCI_CLASS_DEVICE);
if (v != classid)
continue;
if (index) {
index--;
continue;
}
// Found it.
*dev = d;
return 0;
}
}
return -1;
}