arch/mips/pci/pci-emma2rh.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (C) NEC Electronics Corporation 2004-2006
 *
 *  This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c
 *
 *	Copyright 2001 MontaVista Software Inc.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>

#include <asm/bootinfo.h>

#include <asm/emma/emma2rh.h>

static struct resource pci_io_resource = {
	.name = "pci IO space",
	.start = EMMA2RH_PCI_IO_BASE,
	.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1,
	.flags = IORESOURCE_IO,
};

static struct resource pci_mem_resource = {
	.name = "pci memory space",
	.start = EMMA2RH_PCI_MEM_BASE,
	.end = EMMA2RH_PCI_MEM_BASE + EMMA2RH_PCI_MEM_SIZE - 1,
	.flags = IORESOURCE_MEM,
};

extern struct pci_ops emma2rh_pci_ops;

static struct pci_controller emma2rh_pci_controller = {
	.pci_ops = &emma2rh_pci_ops,
	.mem_resource = &pci_mem_resource,
	.io_resource = &pci_io_resource,
	.mem_offset = -0x04000000,
	.io_offset = 0,
};

static void __init emma2rh_pci_init(void)
{
	/* setup PCI interface */
	emma2rh_out32(EMMA2RH_PCI_ARBIT_CTR, 0x70f);

	emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, 0x80000a18);
	emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_COMMAND,
		      PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_CAP_LIST |
		      PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
	emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_BASE_ADDRESS_0, 0x10000000);
	emma2rh_out32(EMMA2RH_PCI_CONFIG_BASE + PCI_BASE_ADDRESS_1, 0x00000000);

	emma2rh_out32(EMMA2RH_PCI_IWIN0_CTR, 0x12000000 | 0x218);
	emma2rh_out32(EMMA2RH_PCI_IWIN1_CTR, 0x18000000 | 0x600);
	emma2rh_out32(EMMA2RH_PCI_INIT_ESWP, 0x00000200);

	emma2rh_out32(EMMA2RH_PCI_TWIN_CTR, 0x00009200);
	emma2rh_out32(EMMA2RH_PCI_TWIN_BADR, 0x00000000);
	emma2rh_out32(EMMA2RH_PCI_TWIN0_DADR, 0x00000000);
	emma2rh_out32(EMMA2RH_PCI_TWIN1_DADR, 0x00000000);
}

static int __init emma2rh_pci_setup(void)
{
	emma2rh_pci_init();
	register_pci_controller(&emma2rh_pci_controller);
	return 0;
}

arch_initcall(emma2rh_pci_setup);