101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
|
||
|
|
*/
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/acpi.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/pci.h>
|
||
|
|
#include <linux/vgaarb.h>
|
||
|
|
#include <asm/cacheflush.h>
|
||
|
|
#include <asm/loongson.h>
|
||
|
|
|
||
|
|
#define PCI_DEVICE_ID_LOONGSON_HOST 0x7a00
|
||
|
|
#define PCI_DEVICE_ID_LOONGSON_DC1 0x7a06
|
||
|
|
#define PCI_DEVICE_ID_LOONGSON_DC2 0x7a36
|
||
|
|
|
||
|
|
int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
|
||
|
|
int reg, int len, u32 *val)
|
||
|
|
{
|
||
|
|
struct pci_bus *bus_tmp = pci_find_bus(domain, bus);
|
||
|
|
|
||
|
|
if (bus_tmp)
|
||
|
|
return bus_tmp->ops->read(bus_tmp, devfn, reg, len, val);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
|
||
|
|
int reg, int len, u32 val)
|
||
|
|
{
|
||
|
|
struct pci_bus *bus_tmp = pci_find_bus(domain, bus);
|
||
|
|
|
||
|
|
if (bus_tmp)
|
||
|
|
return bus_tmp->ops->write(bus_tmp, devfn, reg, len, val);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
phys_addr_t mcfg_addr_init(int node)
|
||
|
|
{
|
||
|
|
return (((u64)node << 44) | MCFG_EXT_PCICFG_BASE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init pcibios_init(void)
|
||
|
|
{
|
||
|
|
unsigned int lsize;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set PCI cacheline size to that of the last level in the
|
||
|
|
* cache hierarchy.
|
||
|
|
*/
|
||
|
|
lsize = cpu_last_level_cache_line_size();
|
||
|
|
|
||
|
|
BUG_ON(!lsize);
|
||
|
|
|
||
|
|
pci_dfl_cache_line_size = lsize >> 2;
|
||
|
|
|
||
|
|
pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
subsys_initcall(pcibios_init);
|
||
|
|
|
||
|
|
int pcibios_device_add(struct pci_dev *dev)
|
||
|
|
{
|
||
|
|
int id;
|
||
|
|
struct irq_domain *dom;
|
||
|
|
|
||
|
|
id = pci_domain_nr(dev->bus);
|
||
|
|
dom = irq_find_matching_fwnode(get_pch_msi_handle(id), DOMAIN_BUS_PCI_MSI);
|
||
|
|
dev_set_msi_domain(&dev->dev, dom);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int pcibios_alloc_irq(struct pci_dev *dev)
|
||
|
|
{
|
||
|
|
if (acpi_disabled)
|
||
|
|
return 0;
|
||
|
|
if (pci_dev_msi_enabled(dev))
|
||
|
|
return 0;
|
||
|
|
return acpi_pci_irq_enable(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void pci_fixup_vgadev(struct pci_dev *pdev)
|
||
|
|
{
|
||
|
|
struct pci_dev *devp = NULL;
|
||
|
|
|
||
|
|
while ((devp = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, devp))) {
|
||
|
|
if (devp->vendor != PCI_VENDOR_ID_LOONGSON) {
|
||
|
|
vga_set_default_device(devp);
|
||
|
|
dev_info(&pdev->dev,
|
||
|
|
"Overriding boot device as %X:%X\n",
|
||
|
|
devp->vendor, devp->device);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, PCI_DEVICE_ID_LOONGSON_DC1, pci_fixup_vgadev);
|
||
|
|
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, PCI_DEVICE_ID_LOONGSON_DC2, pci_fixup_vgadev);
|