dm: x86: pci: Add a PCI driver for driver model
Add a simple x86 PCI driver which uses standard functions provided by the
architecture.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/pci.c b/arch/x86/cpu/pci.c
index c6c5267..e23b233 100644
--- a/arch/x86/cpu/pci.c
+++ b/arch/x86/cpu/pci.c
@@ -10,9 +10,11 @@
*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <pci.h>
+#include <asm/io.h>
#include <asm/pci.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -111,3 +113,41 @@
{
pci_hose_write_config_dword(get_hose(), dev, where, value);
}
+
+int pci_x86_read_config(struct udevice *bus, pci_dev_t bdf, uint offset,
+ ulong *valuep, enum pci_size_t size)
+{
+ outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
+ switch (size) {
+ case PCI_SIZE_8:
+ *valuep = inb(PCI_REG_DATA + (offset & 3));
+ break;
+ case PCI_SIZE_16:
+ *valuep = inw(PCI_REG_DATA + (offset & 2));
+ break;
+ case PCI_SIZE_32:
+ *valuep = inl(PCI_REG_DATA);
+ break;
+ }
+
+ return 0;
+}
+
+int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset,
+ ulong value, enum pci_size_t size)
+{
+ outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
+ switch (size) {
+ case PCI_SIZE_8:
+ outb(value, PCI_REG_DATA + (offset & 3));
+ break;
+ case PCI_SIZE_16:
+ outw(value, PCI_REG_DATA + (offset & 2));
+ break;
+ case PCI_SIZE_32:
+ outl(value, PCI_REG_DATA);
+ break;
+ }
+
+ return 0;
+}