mpc7448_hpc2.c (4994B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * mpc7448_hpc2.c 4 * 5 * Board setup routines for the Freescale mpc7448hpc2(taiga) platform 6 * 7 * Author: Jacob Pan 8 * jacob.pan@freescale.com 9 * Author: Xianghua Xiao 10 * x.xiao@freescale.com 11 * Maintainer: Roy Zang <tie-fei.zang@freescale.com> 12 * Add Flat Device Tree support fot mpc7448hpc2 board 13 * 14 * Copyright 2004-2006 Freescale Semiconductor, Inc. 15 */ 16 17#include <linux/stddef.h> 18#include <linux/kernel.h> 19#include <linux/pci.h> 20#include <linux/kdev_t.h> 21#include <linux/console.h> 22#include <linux/extable.h> 23#include <linux/delay.h> 24#include <linux/irq.h> 25#include <linux/seq_file.h> 26#include <linux/root_dev.h> 27#include <linux/serial.h> 28#include <linux/tty.h> 29#include <linux/serial_core.h> 30#include <linux/of_irq.h> 31 32#include <asm/time.h> 33#include <asm/machdep.h> 34#include <asm/udbg.h> 35#include <asm/tsi108.h> 36#include <asm/pci-bridge.h> 37#include <asm/reg.h> 38#include <mm/mmu_decl.h> 39#include <asm/tsi108_pci.h> 40#include <asm/tsi108_irq.h> 41#include <asm/mpic.h> 42 43#undef DEBUG 44#ifdef DEBUG 45#define DBG(fmt...) do { printk(fmt); } while(0) 46#else 47#define DBG(fmt...) do { } while(0) 48#endif 49 50#define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000 51 52int mpc7448_hpc2_exclude_device(struct pci_controller *hose, 53 u_char bus, u_char devfn) 54{ 55 if (bus == 0 && PCI_SLOT(devfn) == 0) 56 return PCIBIOS_DEVICE_NOT_FOUND; 57 else 58 return PCIBIOS_SUCCESSFUL; 59} 60 61static void __init mpc7448_hpc2_setup_pci(void) 62{ 63#ifdef CONFIG_PCI 64 struct device_node *np; 65 if (ppc_md.progress) 66 ppc_md.progress("mpc7448_hpc2_setup_pci():set_bridge", 0); 67 68 /* setup PCI host bridge */ 69 for_each_compatible_node(np, "pci", "tsi108-pci") 70 tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0); 71 72 ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; 73 if (ppc_md.progress) 74 ppc_md.progress("tsi108: resources set", 0x100); 75#endif 76} 77 78static void __init mpc7448_hpc2_setup_arch(void) 79{ 80 tsi108_csr_vir_base = get_vir_csrbase(); 81 82 printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); 83 printk(KERN_INFO 84 "Jointly ported by Freescale and Tundra Semiconductor\n"); 85 printk(KERN_INFO 86 "Enabling L2 cache then enabling the HID0 prefetch engine.\n"); 87} 88 89/* 90 * Interrupt setup and service. Interrupts on the mpc7448_hpc2 come 91 * from the four external INT pins, PCI interrupts are routed via 92 * PCI interrupt control registers, it generates internal IRQ23 93 * 94 * Interrupt routing on the Taiga Board: 95 * TSI108:PB_INT[0] -> CPU0:INT# 96 * TSI108:PB_INT[1] -> CPU0:MCP# 97 * TSI108:PB_INT[2] -> N/C 98 * TSI108:PB_INT[3] -> N/C 99 */ 100static void __init mpc7448_hpc2_init_IRQ(void) 101{ 102 struct mpic *mpic; 103#ifdef CONFIG_PCI 104 unsigned int cascade_pci_irq; 105 struct device_node *tsi_pci; 106 struct device_node *cascade_node = NULL; 107#endif 108 109 mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | 110 MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108, 111 24, 0, 112 "Tsi108_PIC"); 113 114 BUG_ON(mpic == NULL); 115 116 mpic_assign_isu(mpic, 0, mpic->paddr + 0x100); 117 118 mpic_init(mpic); 119 120#ifdef CONFIG_PCI 121 tsi_pci = of_find_node_by_type(NULL, "pci"); 122 if (tsi_pci == NULL) { 123 printk("%s: No tsi108 pci node found !\n", __func__); 124 return; 125 } 126 cascade_node = of_find_node_by_type(NULL, "pic-router"); 127 if (cascade_node == NULL) { 128 printk("%s: No tsi108 pci cascade node found !\n", __func__); 129 return; 130 } 131 132 cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); 133 DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__, 134 (u32) cascade_pci_irq); 135 tsi108_pci_int_init(cascade_node); 136 irq_set_handler_data(cascade_pci_irq, mpic); 137 irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade); 138#endif 139 /* Configure MPIC outputs to CPU0 */ 140 tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); 141} 142 143void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) 144{ 145 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); 146} 147 148static void __noreturn mpc7448_hpc2_restart(char *cmd) 149{ 150 local_irq_disable(); 151 152 /* Set exception prefix high - to the firmware */ 153 mtmsr(mfmsr() | MSR_IP); 154 isync(); 155 156 for (;;) ; /* Spin until reset happens */ 157} 158 159/* 160 * Called very early, device-tree isn't unflattened 161 */ 162static int __init mpc7448_hpc2_probe(void) 163{ 164 if (!of_machine_is_compatible("mpc74xx")) 165 return 0; 166 return 1; 167} 168 169static int mpc7448_machine_check_exception(struct pt_regs *regs) 170{ 171 const struct exception_table_entry *entry; 172 173 /* Are we prepared to handle this fault */ 174 if ((entry = search_exception_tables(regs->nip)) != NULL) { 175 tsi108_clear_pci_cfg_error(); 176 regs_set_recoverable(regs); 177 regs_set_return_ip(regs, extable_fixup(entry)); 178 return 1; 179 } 180 return 0; 181} 182 183define_machine(mpc7448_hpc2){ 184 .name = "MPC7448 HPC2", 185 .probe = mpc7448_hpc2_probe, 186 .setup_arch = mpc7448_hpc2_setup_arch, 187 .discover_phbs = mpc7448_hpc2_setup_pci, 188 .init_IRQ = mpc7448_hpc2_init_IRQ, 189 .show_cpuinfo = mpc7448_hpc2_show_cpuinfo, 190 .get_irq = mpic_get_irq, 191 .restart = mpc7448_hpc2_restart, 192 .calibrate_decr = generic_calibrate_decr, 193 .machine_check_exception= mpc7448_machine_check_exception, 194 .progress = udbg_progress, 195};