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/*
* Copyright (C) 2009 Extreme Engineering Solutions, Inc.
*
* X-ES board-specific functionality
*
* Based on mpc85xx_ds code from Freescale Semiconductor, Inc.
*
* Author: Nate Case <ncase@xes-inc.com>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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 <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
/* A few bit definitions needed for fixups on some boards */
#define MPC85xx_L2CTL_L2E 0x80000000 /* L2 enable */
#define MPC85xx_L2CTL_L2I 0x40000000 /* L2 flash invalidate */
#define MPC85xx_L2CTL_L2SIZ_MASK 0x30000000 /* L2 SRAM size (R/O) */
void __init xes_mpc85xx_pic_init(void)
{
struct mpic *mpic;
struct resource r;
struct device_node *np;
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);
}
static void xes_mpc85xx_configure_l2(void __iomem *l2_base)
{
volatile uint32_t ctl, tmp;
asm volatile("msync; isync");
tmp = in_be32(l2_base);
/*
* xMon may have enabled part of L2 as SRAM, so we need to set it
* up for all cache mode just to be safe.
*/
printk(KERN_INFO "xes_mpc85xx: Enabling L2 as cache\n");
ctl = MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2I;
if (machine_is_compatible("MPC8540") ||
machine_is_compatible("MPC8560"))
/*
* Assume L2 SRAM is used fully for cache, so set
* L2BLKSZ (bits 4:5) to match L2SIZ (bits 2:3).
*/
ctl |= (tmp & MPC85xx_L2CTL_L2SIZ_MASK) >> 2;
asm volatile("msync; isync");
out_be32(l2_base, ctl);
asm volatile("msync; isync");
}
static void xes_mpc85xx_fixups(void)
{
struct device_node *np;
int err;
/*
* Legacy xMon firmware on some X-ES boards does not enable L2
* as cache. We must ensure that they get enabled here.
*/
for_each_node_by_name(np, "l2-cache-controller") {
struct resource r[2];
void __iomem *l2_base;
/* Only MPC8548, MPC8540, and MPC8560 boards are affected */
if (!of_device_is_compatible(np,
"fsl,mpc8548-l2-cache-controller") &&
!of_device_is_compatible(np,
"fsl,mpc8540-l2-cache-controller") &&
!of_device_is_compatible(np,
"fsl,mpc8560-l2-cache-controller"))
continue;
err = of_address_to_resource(np, 0, &r[0]);
if (err) {
printk(KERN_WARNING "xes_mpc85xx: Could not get "
"resource for device tree node '%s'",
np->full_name);
continue;
}
l2_base = ioremap(r[0].start, r[0].end - r[0].start + 1);
xes_mpc85xx_configure_l2(l2_base);
}
}
#ifdef CONFIG_PCI
static int primary_phb_addr;
#endif
/*
* Setup the architecture
*/
#ifdef CONFIG_SMP
extern void __init mpc85xx_smp_init(void);
#endif
static void __init xes_mpc85xx_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
#endif
struct device_node *root;
const char *model = "Unknown";
root = of_find_node_by_path("/");
if (root == NULL)
return;
model = of_get_property(root, "model", NULL);
printk(KERN_INFO "X-ES MPC85xx-based single-board computer: %s\n",
model + strlen("xes,"));
xes_mpc85xx_fixups();
#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);
}
}
#endif
#ifdef CONFIG_SMP
mpc85xx_smp_init();
#endif
}
static struct of_device_id __initdata xes_mpc85xx_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .compatible = "simple-bus", },
{ .compatible = "gianfar", },
{},
};
static int __init xes_mpc85xx_publish_devices(void)
{
return of_platform_bus_probe(NULL, xes_mpc85xx_ids, NULL);
}
machine_device_initcall(xes_mpc8572, xes_mpc85xx_publish_devices);
machine_device_initcall(xes_mpc8548, xes_mpc85xx_publish_devices);
machine_device_initcall(xes_mpc8540, xes_mpc85xx_publish_devices);
/*
* Called very early, device-tree isn't unflattened
*/
static int __init xes_mpc8572_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "xes,MPC8572")) {
#ifdef CONFIG_PCI
primary_phb_addr = 0x8000;
#endif
return 1;
} else {
return 0;
}
}
static int __init xes_mpc8548_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "xes,MPC8548")) {
#ifdef CONFIG_PCI
primary_phb_addr = 0xb000;
#endif
return 1;
} else {
return 0;
}
}
static int __init xes_mpc8540_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "xes,MPC8540")) {
#ifdef CONFIG_PCI
primary_phb_addr = 0xb000;
#endif
return 1;
} else {
return 0;
}
}
define_machine(xes_mpc8572) {
.name = "X-ES MPC8572",
.probe = xes_mpc8572_probe,
.setup_arch = xes_mpc85xx_setup_arch,
.init_IRQ = xes_mpc85xx_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(xes_mpc8548) {
.name = "X-ES MPC8548",
.probe = xes_mpc8548_probe,
.setup_arch = xes_mpc85xx_setup_arch,
.init_IRQ = xes_mpc85xx_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(xes_mpc8540) {
.name = "X-ES MPC8540",
.probe = xes_mpc8540_probe,
.setup_arch = xes_mpc85xx_setup_arch,
.init_IRQ = xes_mpc85xx_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,
};
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