195 lines
5.0 KiB
C
195 lines
5.0 KiB
C
/*
|
|
* mpc7448_hpc2.c
|
|
*
|
|
* Board setup routines for the Freescale mpc7448hpc2(taiga) platform
|
|
*
|
|
* Author: Jacob Pan
|
|
* jacob.pan@freescale.com
|
|
* Author: Xianghua Xiao
|
|
* x.xiao@freescale.com
|
|
* Maintainer: Roy Zang <tie-fei.zang@freescale.com>
|
|
* Add Flat Device Tree support fot mpc7448hpc2 board
|
|
*
|
|
* Copyright 2004-2006 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/console.h>
|
|
#include <linux/extable.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/serial_core.h>
|
|
|
|
#include <asm/time.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/udbg.h>
|
|
#include <asm/tsi108.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/reg.h>
|
|
#include <mm/mmu_decl.h>
|
|
#include <asm/tsi108_pci.h>
|
|
#include <asm/tsi108_irq.h>
|
|
#include <asm/mpic.h>
|
|
|
|
#undef DEBUG
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) do { printk(fmt); } while(0)
|
|
#else
|
|
#define DBG(fmt...) do { } while(0)
|
|
#endif
|
|
|
|
#define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
|
|
|
|
int mpc7448_hpc2_exclude_device(struct pci_controller *hose,
|
|
u_char bus, u_char devfn)
|
|
{
|
|
if (bus == 0 && PCI_SLOT(devfn) == 0)
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
else
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static void __init mpc7448_hpc2_setup_arch(void)
|
|
{
|
|
struct device_node *np;
|
|
if (ppc_md.progress)
|
|
ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
|
|
|
|
tsi108_csr_vir_base = get_vir_csrbase();
|
|
|
|
/* setup PCI host bridge */
|
|
#ifdef CONFIG_PCI
|
|
for_each_compatible_node(np, "pci", "tsi108-pci")
|
|
tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0);
|
|
|
|
ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
|
|
if (ppc_md.progress)
|
|
ppc_md.progress("tsi108: resources set", 0x100);
|
|
#endif
|
|
|
|
printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
|
|
printk(KERN_INFO
|
|
"Jointly ported by Freescale and Tundra Semiconductor\n");
|
|
printk(KERN_INFO
|
|
"Enabling L2 cache then enabling the HID0 prefetch engine.\n");
|
|
}
|
|
|
|
/*
|
|
* Interrupt setup and service. Interrupts on the mpc7448_hpc2 come
|
|
* from the four external INT pins, PCI interrupts are routed via
|
|
* PCI interrupt control registers, it generates internal IRQ23
|
|
*
|
|
* Interrupt routing on the Taiga Board:
|
|
* TSI108:PB_INT[0] -> CPU0:INT#
|
|
* TSI108:PB_INT[1] -> CPU0:MCP#
|
|
* TSI108:PB_INT[2] -> N/C
|
|
* TSI108:PB_INT[3] -> N/C
|
|
*/
|
|
static void __init mpc7448_hpc2_init_IRQ(void)
|
|
{
|
|
struct mpic *mpic;
|
|
#ifdef CONFIG_PCI
|
|
unsigned int cascade_pci_irq;
|
|
struct device_node *tsi_pci;
|
|
struct device_node *cascade_node = NULL;
|
|
#endif
|
|
|
|
mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
|
|
MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
|
|
24, 0,
|
|
"Tsi108_PIC");
|
|
|
|
BUG_ON(mpic == NULL);
|
|
|
|
mpic_assign_isu(mpic, 0, mpic->paddr + 0x100);
|
|
|
|
mpic_init(mpic);
|
|
|
|
#ifdef CONFIG_PCI
|
|
tsi_pci = of_find_node_by_type(NULL, "pci");
|
|
if (tsi_pci == NULL) {
|
|
printk("%s: No tsi108 pci node found !\n", __func__);
|
|
return;
|
|
}
|
|
cascade_node = of_find_node_by_type(NULL, "pic-router");
|
|
if (cascade_node == NULL) {
|
|
printk("%s: No tsi108 pci cascade node found !\n", __func__);
|
|
return;
|
|
}
|
|
|
|
cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
|
|
DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__,
|
|
(u32) cascade_pci_irq);
|
|
tsi108_pci_int_init(cascade_node);
|
|
irq_set_handler_data(cascade_pci_irq, mpic);
|
|
irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
|
|
#endif
|
|
/* Configure MPIC outputs to CPU0 */
|
|
tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
|
|
}
|
|
|
|
void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
|
|
}
|
|
|
|
static void __noreturn mpc7448_hpc2_restart(char *cmd)
|
|
{
|
|
local_irq_disable();
|
|
|
|
/* Set exception prefix high - to the firmware */
|
|
_nmask_and_or_msr(0, MSR_IP);
|
|
|
|
for (;;) ; /* Spin until reset happens */
|
|
}
|
|
|
|
/*
|
|
* Called very early, device-tree isn't unflattened
|
|
*/
|
|
static int __init mpc7448_hpc2_probe(void)
|
|
{
|
|
if (!of_machine_is_compatible("mpc74xx"))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static int mpc7448_machine_check_exception(struct pt_regs *regs)
|
|
{
|
|
const struct exception_table_entry *entry;
|
|
|
|
/* Are we prepared to handle this fault */
|
|
if ((entry = search_exception_tables(regs->nip)) != NULL) {
|
|
tsi108_clear_pci_cfg_error();
|
|
regs->msr |= MSR_RI;
|
|
regs->nip = extable_fixup(entry);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
define_machine(mpc7448_hpc2){
|
|
.name = "MPC7448 HPC2",
|
|
.probe = mpc7448_hpc2_probe,
|
|
.setup_arch = mpc7448_hpc2_setup_arch,
|
|
.init_IRQ = mpc7448_hpc2_init_IRQ,
|
|
.show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
|
|
.get_irq = mpic_get_irq,
|
|
.restart = mpc7448_hpc2_restart,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
.machine_check_exception= mpc7448_machine_check_exception,
|
|
.progress = udbg_progress,
|
|
};
|