mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
f146bd96e4
PCI msc01 driver uses standard format of Config Address for PCI Configuration Mechanism #1 but with cleared Enable bit. So use new U-Boot macro PCI_CONF1_ADDRESS() with clearing PCI_CONF1_ENABLE bit and remove old custom driver address macros. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Simon Glass <sjg@chromium.org>
129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2013 Imagination Technologies
|
|
* Author: Paul Burton <paul.burton@mips.com>
|
|
*/
|
|
|
|
#include <dm.h>
|
|
#include <init.h>
|
|
#include <msc01.h>
|
|
#include <pci.h>
|
|
#include <pci_msc01.h>
|
|
#include <asm/io.h>
|
|
|
|
#define PCI_ACCESS_READ 0
|
|
#define PCI_ACCESS_WRITE 1
|
|
|
|
struct msc01_pci_controller {
|
|
struct pci_controller hose;
|
|
void *base;
|
|
};
|
|
|
|
static inline struct msc01_pci_controller *
|
|
hose_to_msc01(struct pci_controller *hose)
|
|
{
|
|
return container_of(hose, struct msc01_pci_controller, hose);
|
|
}
|
|
|
|
static int msc01_config_access(struct msc01_pci_controller *msc01,
|
|
unsigned char access_type, pci_dev_t bdf,
|
|
int where, u32 *data)
|
|
{
|
|
const u32 aborts = MSC01_PCI_INTSTAT_MA_MSK | MSC01_PCI_INTSTAT_TA_MSK;
|
|
void *intstat = msc01->base + MSC01_PCI_INTSTAT_OFS;
|
|
void *cfgdata = msc01->base + MSC01_PCI_CFGDATA_OFS;
|
|
unsigned int bus = PCI_BUS(bdf);
|
|
unsigned int dev = PCI_DEV(bdf);
|
|
unsigned int func = PCI_FUNC(bdf);
|
|
|
|
/* clear abort status */
|
|
__raw_writel(aborts, intstat);
|
|
|
|
/* setup address */
|
|
__raw_writel((PCI_CONF1_ADDRESS(bus, dev, func, where) & ~PCI_CONF1_ENABLE),
|
|
msc01->base + MSC01_PCI_CFGADDR_OFS);
|
|
|
|
/* perform access */
|
|
if (access_type == PCI_ACCESS_WRITE)
|
|
__raw_writel(*data, cfgdata);
|
|
else
|
|
*data = __raw_readl(cfgdata);
|
|
|
|
/* check for aborts */
|
|
if (__raw_readl(intstat) & aborts) {
|
|
/* clear abort status */
|
|
__raw_writel(aborts, intstat);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msc01_pci_read_config(const struct udevice *dev, pci_dev_t bdf,
|
|
uint where, ulong *val, enum pci_size_t size)
|
|
{
|
|
struct msc01_pci_controller *msc01 = dev_get_priv(dev);
|
|
u32 data = 0;
|
|
|
|
if (msc01_config_access(msc01, PCI_ACCESS_READ, bdf, where, &data)) {
|
|
*val = pci_get_ff(size);
|
|
return 0;
|
|
}
|
|
|
|
*val = pci_conv_32_to_size(data, where, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msc01_pci_write_config(struct udevice *dev, pci_dev_t bdf,
|
|
uint where, ulong val, enum pci_size_t size)
|
|
{
|
|
struct msc01_pci_controller *msc01 = dev_get_priv(dev);
|
|
u32 data = 0;
|
|
|
|
if (size == PCI_SIZE_32) {
|
|
data = val;
|
|
} else {
|
|
u32 old;
|
|
|
|
if (msc01_config_access(msc01, PCI_ACCESS_READ, bdf, where, &old))
|
|
return 0;
|
|
|
|
data = pci_conv_size_to_32(old, val, where, size);
|
|
}
|
|
|
|
msc01_config_access(msc01, PCI_ACCESS_WRITE, bdf, where, &data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msc01_pci_probe(struct udevice *dev)
|
|
{
|
|
struct msc01_pci_controller *msc01 = dev_get_priv(dev);
|
|
|
|
msc01->base = dev_remap_addr(dev);
|
|
if (!msc01->base)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_pci_ops msc01_pci_ops = {
|
|
.read_config = msc01_pci_read_config,
|
|
.write_config = msc01_pci_write_config,
|
|
};
|
|
|
|
static const struct udevice_id msc01_pci_ids[] = {
|
|
{ .compatible = "mips,pci-msc01" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(msc01_pci) = {
|
|
.name = "msc01_pci",
|
|
.id = UCLASS_PCI,
|
|
.of_match = msc01_pci_ids,
|
|
.ops = &msc01_pci_ops,
|
|
.probe = msc01_pci_probe,
|
|
.priv_auto = sizeof(struct msc01_pci_controller),
|
|
};
|