132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2013 Cavium, Inc.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <uapi/asm/bitfield.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/io.h>
|
|
|
|
#define PCI_CONFIG_ADDRESS 0xcf8
|
|
#define PCI_CONFIG_DATA 0xcfc
|
|
|
|
union pci_config_address {
|
|
struct {
|
|
__BITFIELD_FIELD(unsigned enable_bit : 1, /* 31 */
|
|
__BITFIELD_FIELD(unsigned reserved : 7, /* 30 .. 24 */
|
|
__BITFIELD_FIELD(unsigned bus_number : 8, /* 23 .. 16 */
|
|
__BITFIELD_FIELD(unsigned devfn_number : 8, /* 15 .. 8 */
|
|
__BITFIELD_FIELD(unsigned register_number : 8, /* 7 .. 0 */
|
|
)))));
|
|
};
|
|
u32 w;
|
|
};
|
|
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
return ((pin + slot) % 4)+ MIPS_IRQ_PCIA;
|
|
}
|
|
|
|
static void pci_virtio_guest_write_config_addr(struct pci_bus *bus,
|
|
unsigned int devfn, int reg)
|
|
{
|
|
union pci_config_address pca = { .w = 0 };
|
|
|
|
pca.register_number = reg;
|
|
pca.devfn_number = devfn;
|
|
pca.bus_number = bus->number;
|
|
pca.enable_bit = 1;
|
|
|
|
outl(pca.w, PCI_CONFIG_ADDRESS);
|
|
}
|
|
|
|
static int pci_virtio_guest_write_config(struct pci_bus *bus,
|
|
unsigned int devfn, int reg, int size, u32 val)
|
|
{
|
|
pci_virtio_guest_write_config_addr(bus, devfn, reg);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
outb(val, PCI_CONFIG_DATA + (reg & 3));
|
|
break;
|
|
case 2:
|
|
outw(val, PCI_CONFIG_DATA + (reg & 2));
|
|
break;
|
|
case 4:
|
|
outl(val, PCI_CONFIG_DATA);
|
|
break;
|
|
}
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int pci_virtio_guest_read_config(struct pci_bus *bus, unsigned int devfn,
|
|
int reg, int size, u32 *val)
|
|
{
|
|
pci_virtio_guest_write_config_addr(bus, devfn, reg);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
*val = inb(PCI_CONFIG_DATA + (reg & 3));
|
|
break;
|
|
case 2:
|
|
*val = inw(PCI_CONFIG_DATA + (reg & 2));
|
|
break;
|
|
case 4:
|
|
*val = inl(PCI_CONFIG_DATA);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static struct pci_ops pci_virtio_guest_ops = {
|
|
.read = pci_virtio_guest_read_config,
|
|
.write = pci_virtio_guest_write_config,
|
|
};
|
|
|
|
static struct resource pci_virtio_guest_mem_resource = {
|
|
.name = "Virtio MEM",
|
|
.flags = IORESOURCE_MEM,
|
|
.start = 0x10000000,
|
|
.end = 0x1dffffff
|
|
};
|
|
|
|
static struct resource pci_virtio_guest_io_resource = {
|
|
.name = "Virtio IO",
|
|
.flags = IORESOURCE_IO,
|
|
.start = 0,
|
|
.end = 0xffff
|
|
};
|
|
|
|
static struct pci_controller pci_virtio_guest_controller = {
|
|
.pci_ops = &pci_virtio_guest_ops,
|
|
.mem_resource = &pci_virtio_guest_mem_resource,
|
|
.io_resource = &pci_virtio_guest_io_resource,
|
|
};
|
|
|
|
static int __init pci_virtio_guest_setup(void)
|
|
{
|
|
pr_err("pci_virtio_guest_setup\n");
|
|
|
|
/* Virtio comes pre-assigned */
|
|
pci_set_flags(PCI_PROBE_ONLY);
|
|
|
|
pci_virtio_guest_controller.io_map_base = mips_io_port_base;
|
|
register_pci_controller(&pci_virtio_guest_controller);
|
|
return 0;
|
|
}
|
|
arch_initcall(pci_virtio_guest_setup);
|