/*
* Wind River SBC8548 setup and early boot code.
*
* Copyright 2007 Wind River Systems Inc.
*
* By Paul Gortmaker (see MAINTAINERS for contact information)
*
* Based largely on the MPC8548CDS support - Copyright 2005 Freescale 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/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/fsl_devices.h>
#include <linux/of_platform.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ipic.h>
#include <asm/pci-bridge.h>
#include <asm/irq.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
static int sbc_rev;
static void __init sbc8548_pic_init(void)
{
struct mpic *mpic;
struct resource r;
struct device_node *np = NULL;
np = of_find_node_by_type(np, "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,
0, 256, " OpenPIC ");
BUG_ON(mpic == NULL);
/* Return the mpic node */
of_node_put(np);
mpic_init(mpic);
}
/* Extract the HW Rev from the EPLD on the board */
static int __init sbc8548_hw_rev(void)
{
struct device_node *np;
struct resource res;
unsigned int *rev;
int board_rev = 0;
np = of_find_compatible_node(NULL, NULL, "hw-rev");
if (np == NULL) {
printk("No HW-REV found in DTB.\n");
return -ENODEV;
}
of_address_to_resource(np, 0, &res);
of_node_put(np);
rev = ioremap(res.start,sizeof(unsigned int));
board_rev = (*rev) >> 28;
iounmap(rev);
return board_rev;
}
/*
* Setup the architecture
*/
static void __init sbc8548_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
#endif
if (ppc_md.progress)
ppc_md.progress("sbc8548_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) == 0x8000)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
}
}
#endif
sbc_rev = sbc8548_hw_rev();
}
static void sbc8548_show_cpuinfo(struct seq_file *m)
{
uint pvid, svid, phid1;
pvid = mfspr(SPRN_PVR);
svid = mfspr(SPRN_SVR);
seq_printf(m, "Vendor\t\t: Wind River\n");
seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
seq_printf(m, "SVR\t\t: 0x%x\n", svid);
/* Display cpu Pll setting */
phid1 = mfspr(SPRN_HID1);
seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
}
static struct of_device_id __initdata of_bus_ids[] = {
{ .name = "soc", },
{ .type = "soc", },
{ .compatible = "simple-bus", },
{},
};
static int __init declare_of_platform_devices(void)
{
of_platform_bus_probe(NULL, of_bus_ids, NULL);
return 0;
}
machine_device_initcall(sbc8548, declare_of_platform_devices);
/*
* Called very early, device-tree isn't unflattened
*/
static int __init sbc8548_probe(void)
{
unsigned long root = of_get_flat_dt_root();
return of_flat_dt_is_compatible(root, "SBC8548");
}
define_machine(sbc8548) {
.name = "SBC8548",
.probe = sbc8548_probe,
.setup_arch = sbc8548_setup_arch,
.init_IRQ = sbc8548_pic_init,
.show_cpuinfo = sbc8548_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
#ifdef CONFIG_PCI
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#endif
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
