228 lines
5.7 KiB
C
228 lines
5.7 KiB
C
/*
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* mpc7448_hpc2.c
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*
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* Board setup routines for the Freescale mpc7448hpc2(taiga) platform
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*
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* Author: Jacob Pan
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* jacob.pan@freescale.com
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* Author: Xianghua Xiao
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* x.xiao@freescale.com
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* Maintainer: Roy Zang <tie-fei.zang@freescale.com>
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* Add Flat Device Tree support fot mpc7448hpc2 board
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*
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* Copyright 2004-2006 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/serial.h>
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#include <linux/tty.h>
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#include <linux/serial_core.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <asm/tsi108.h>
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#include <asm/pci-bridge.h>
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#include <asm/reg.h>
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#include <mm/mmu_decl.h>
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#include <asm/tsi108_pci.h>
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#include <asm/tsi108_irq.h>
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#include <asm/mpic.h>
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) do { printk(fmt); } while(0)
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#else
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#define DBG(fmt...) do { } while(0)
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#endif
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#define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
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int mpc7448_hpc2_exclude_device(struct pci_controller *hose,
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u_char bus, u_char devfn)
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{
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if (bus == 0 && PCI_SLOT(devfn) == 0)
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return PCIBIOS_DEVICE_NOT_FOUND;
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else
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return PCIBIOS_SUCCESSFUL;
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}
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static void __init mpc7448_hpc2_setup_arch(void)
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{
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struct device_node *np;
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if (ppc_md.progress)
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ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
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tsi108_csr_vir_base = get_vir_csrbase();
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/* setup PCI host bridge */
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#ifdef CONFIG_PCI
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for_each_compatible_node(np, "pci", "tsi108-pci")
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tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0);
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ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
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if (ppc_md.progress)
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ppc_md.progress("tsi108: resources set", 0x100);
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#endif
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printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
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printk(KERN_INFO
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"Jointly ported by Freescale and Tundra Semiconductor\n");
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printk(KERN_INFO
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"Enabling L2 cache then enabling the HID0 prefetch engine.\n");
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}
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/*
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* Interrupt setup and service. Interrupts on the mpc7448_hpc2 come
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* from the four external INT pins, PCI interrupts are routed via
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* PCI interrupt control registers, it generates internal IRQ23
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*
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* Interrupt routing on the Taiga Board:
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* TSI108:PB_INT[0] -> CPU0:INT#
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* TSI108:PB_INT[1] -> CPU0:MCP#
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* TSI108:PB_INT[2] -> N/C
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* TSI108:PB_INT[3] -> N/C
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*/
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static void __init mpc7448_hpc2_init_IRQ(void)
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{
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struct mpic *mpic;
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phys_addr_t mpic_paddr = 0;
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struct device_node *tsi_pic;
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#ifdef CONFIG_PCI
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unsigned int cascade_pci_irq;
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struct device_node *tsi_pci;
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struct device_node *cascade_node = NULL;
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#endif
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tsi_pic = of_find_node_by_type(NULL, "open-pic");
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if (tsi_pic) {
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unsigned int size;
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const void *prop = of_get_property(tsi_pic, "reg", &size);
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mpic_paddr = of_translate_address(tsi_pic, prop);
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}
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if (mpic_paddr == 0) {
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printk("%s: No tsi108 PIC found !\n", __func__);
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return;
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}
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DBG("%s: tsi108 pic phys_addr = 0x%x\n", __func__,
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(u32) mpic_paddr);
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mpic = mpic_alloc(tsi_pic, mpic_paddr,
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MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
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MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
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24,
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NR_IRQS-4, /* num_sources used */
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"Tsi108_PIC");
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BUG_ON(mpic == NULL);
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mpic_assign_isu(mpic, 0, mpic_paddr + 0x100);
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mpic_init(mpic);
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#ifdef CONFIG_PCI
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tsi_pci = of_find_node_by_type(NULL, "pci");
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if (tsi_pci == NULL) {
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printk("%s: No tsi108 pci node found !\n", __func__);
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return;
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}
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cascade_node = of_find_node_by_type(NULL, "pic-router");
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if (cascade_node == NULL) {
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printk("%s: No tsi108 pci cascade node found !\n", __func__);
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return;
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}
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cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
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DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__,
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(u32) cascade_pci_irq);
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tsi108_pci_int_init(cascade_node);
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set_irq_data(cascade_pci_irq, mpic);
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set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
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#endif
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/* Configure MPIC outputs to CPU0 */
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tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
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of_node_put(tsi_pic);
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}
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void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
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{
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seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
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}
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void mpc7448_hpc2_restart(char *cmd)
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{
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local_irq_disable();
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/* Set exception prefix high - to the firmware */
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_nmask_and_or_msr(0, MSR_IP);
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for (;;) ; /* Spin until reset happens */
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}
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void mpc7448_hpc2_power_off(void)
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{
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local_irq_disable();
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for (;;) ; /* No way to shut power off with software */
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}
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void mpc7448_hpc2_halt(void)
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{
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mpc7448_hpc2_power_off();
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}
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init mpc7448_hpc2_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(root, "mpc74xx"))
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return 0;
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return 1;
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}
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static int mpc7448_machine_check_exception(struct pt_regs *regs)
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{
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const struct exception_table_entry *entry;
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/* Are we prepared to handle this fault */
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if ((entry = search_exception_tables(regs->nip)) != NULL) {
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tsi108_clear_pci_cfg_error();
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regs->msr |= MSR_RI;
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regs->nip = entry->fixup;
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return 1;
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}
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return 0;
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}
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define_machine(mpc7448_hpc2){
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.name = "MPC7448 HPC2",
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.probe = mpc7448_hpc2_probe,
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.setup_arch = mpc7448_hpc2_setup_arch,
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.init_IRQ = mpc7448_hpc2_init_IRQ,
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.show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = mpc7448_hpc2_restart,
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.calibrate_decr = generic_calibrate_decr,
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.machine_check_exception= mpc7448_machine_check_exception,
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.progress = udbg_progress,
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};
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