/*
* MPC85xx DS Board Setup
*
* Author Xianghua Xiao (x.xiao@freescale.com)
* Roy Zang <tie-fei.zang@freescale.com>
* - Add PCI/PCI Exprees support
* Copyright 2007 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/i8259.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#undef DEBUG
#ifdef DEBUG
#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
#else
#define DBG(fmt, args...)
#endif
#ifdef CONFIG_PPC_I8259
static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
{
unsigned int cascade_irq = i8259_irq();
if (cascade_irq != NO_IRQ) {
generic_handle_irq(cascade_irq);
}
desc->chip->eoi(irq);
}
#endif /* CONFIG_PPC_I8259 */
void __init mpc85xx_ds_pic_init(void)
{
struct mpic *mpic;
struct resource r;
struct device_node *np;
#ifdef CONFIG_PPC_I8259
struct device_node *cascade_node = NULL;
int cascade_irq;
#endif
np = of_find_node_by_type(NULL, "open-pic");
if (np == NULL) {
printk(KERN_ERR "Could not find open-pic node\n");
return;
}
if (of_address_to_resource(np, 0, &r)) {
printk(KERN_ERR "Failed to map mpic register space\n");
of_node_put(np);
return;
}
mpic = mpic_alloc(np, r.start,
MPIC_PRIMARY | MPIC_WANTS_RESET |
MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
of_node_put(np);
mpic_init(mpic);
#ifdef CONFIG_PPC_I8259
/* Initialize the i8259 controller */
for_each_node_by_type(np, "interrupt-controller")
if (of_device_is_compatible(np, "chrp,iic")) {
cascade_node = np;
break;
}
if (cascade_node == NULL) {
printk(KERN_DEBUG "Could not find i8259 PIC\n");
return;
}
cascade_irq = irq_of_parse_and_map(cascade_node, 0);
if (cascade_irq == NO_IRQ) {
printk(KERN_ERR "Failed to map cascade interrupt\n");
return;
}
DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
i8259_init(cascade_node, 0);
of_node_put(cascade_node);
set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
#endif /* CONFIG_PPC_I8259 */
}
#ifdef CONFIG_PCI
static int primary_phb_addr;
extern int uli_exclude_device(struct pci_controller *hose,
u_char bus, u_char devfn);
static int mpc85xx_exclude_device(struct pci_controller *hose,
u_char bus, u_char devfn)
{
struct device_node* node;
struct resource rsrc;
node = hose->dn;
of_address_to_resource(node, 0, &rsrc);
if ((rsrc.start & 0xfffff) == primary_phb_addr) {
return uli_exclude_device(hose, bus, devfn);
}
return PCIBIOS_SUCCESSFUL;
}
#endif /* CONFIG_PCI */
/*
* Setup the architecture
*/
static void __init mpc85xx_ds_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
#endif
if (ppc_md.progress)
ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
#ifdef CONFIG_PCI
for_each_node_by_type(np, "pci") {
if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
struct resource rsrc;
of_address_to_resource(np, 0, &rsrc);
if ((rsrc.start & 0xfffff) == primary_phb_addr)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
}
}
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
printk("MPC85xx DS board from Freescale Semiconductor\n");
}
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc8544_ds_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
#ifdef CONFIG_PCI
primary_phb_addr = 0xb000;
#endif
return 1;
} else {
return 0;
}
}
static struct of_device_id __initdata mpc85xxds_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .compatible = "simple-bus", },
{},
};
static int __init mpc85xxds_publish_devices(void)
{
return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
}
machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc8572_ds_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
#ifdef CONFIG_PCI
primary_phb_addr = 0x8000;
#endif
return 1;
} else {
return 0;
}
}
define_machine(mpc8544_ds) {
.name = "MPC8544 DS",
.probe = mpc8544_ds_probe,
.setup_arch = mpc85xx_ds_setup_arch,
.init_IRQ = mpc85xx_ds_pic_init,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#endif
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
define_machine(mpc8572_ds) {
.name = "MPC8572 DS",
.probe = mpc8572_ds_probe,
.setup_arch = mpc85xx_ds_setup_arch,
.init_IRQ = mpc85xx_ds_pic_init,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#endif
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
