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dm: x86: pci: Add a PCI driver for driver model

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Add a simple x86 PCI driver which uses standard functions provided by the
architecture.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-03-05 12:25:31 -07:00
parent a33aca10ac
commit a219daeafe
5 changed files with 75 additions and 0 deletions
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40
arch/x86/cpu/pci.c
View File

@ -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 @@ void x86_pci_write_config32(pci_dev_t dev, unsigned where, unsigned value)
{
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;
}

8
arch/x86/include/asm/pci.h
View File

@ -8,6 +8,8 @@
#ifndef _PCI_I386_H_
#define _PCI_I386_H_
#include <pci.h>
/* bus mapping constants (used for PCI core initialization) */
#define PCI_REG_ADDR 0xcf8
#define PCI_REG_DATA 0xcfc
@ -56,6 +58,12 @@ void x86_pci_write_config8(pci_dev_t dev, unsigned where, unsigned value);
void x86_pci_write_config16(pci_dev_t dev, unsigned where, unsigned value);
void x86_pci_write_config32(pci_dev_t dev, unsigned where, unsigned value);
int pci_x86_read_config(struct udevice *bus, pci_dev_t bdf, uint offset,
ulong *valuep, enum pci_size_t size);
int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset,
ulong value, enum pci_size_t size);
#endif /* __ASSEMBLY__ */
#endif /* _PCI_I386_H_ */

2
arch/x86/lib/Makefile
View File

@ -17,7 +17,9 @@ obj-y += interrupts.o
obj-y += cmd_mtrr.o
obj-$(CONFIG_SYS_PCAT_INTERRUPTS) += pcat_interrupts.o
obj-$(CONFIG_SYS_PCAT_TIMER) += pcat_timer.o
ifndef CONFIG_DM_PCI
obj-$(CONFIG_PCI) += pci_type1.o
endif
obj-y += relocate.o
obj-y += physmem.o
obj-$(CONFIG_X86_RAMTEST) += ramtest.o

1
drivers/pci/Makefile
View File

@ -9,6 +9,7 @@ ifneq ($(CONFIG_DM_PCI),)
obj-$(CONFIG_PCI) += pci-uclass.o pci_compat.o
obj-$(CONFIG_PCI_SANDBOX) += pci_sandbox.o
obj-$(CONFIG_SANDBOX) += pci-emul-uclass.o
obj-$(CONFIG_X86) += pci_x86.o
else
obj-$(CONFIG_PCI) += pci.o
endif

24
drivers/pci/pci_x86.c Normal file
View File

@ -0,0 +1,24 @@
/*
* Copyright (c) 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <pci.h>
static const struct dm_pci_ops x86_pci_ops = {
};
static const struct udevice_id x86_pci_ids[] = {
{ .compatible = "x86,pci" },
{ }
};
U_BOOT_DRIVER(pci_x86) = {
.name = "pci_x86",
.id = UCLASS_PCI,
.of_match = x86_pci_ids,
.ops = &x86_pci_ops,
};