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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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.
*/
#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 */
mtmsr(mfmsr() | MSR_IP);
isync();
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,
};
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