4 * Board setup routines for the Freescale mpc7448hpc2(taiga) platform
7 * jacob.pan@freescale.com
8 * Author: Xianghua Xiao
10 * Maintainer: Roy Zang <tie-fei.zang@freescale.com>
11 * Add Flat Device Tree support fot mpc7448hpc2 board
13 * Copyright 2004-2006 Freescale Semiconductor, Inc.
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
21 #include <linux/stddef.h>
22 #include <linux/kernel.h>
23 #include <linux/pci.h>
24 #include <linux/kdev_t.h>
25 #include <linux/console.h>
26 #include <linux/module.h>
27 #include <linux/delay.h>
28 #include <linux/irq.h>
29 #include <linux/seq_file.h>
30 #include <linux/root_dev.h>
31 #include <linux/serial.h>
32 #include <linux/tty.h>
33 #include <linux/serial_core.h>
35 #include <asm/system.h>
37 #include <asm/machdep.h>
40 #include <asm/tsi108.h>
41 #include <asm/pci-bridge.h>
43 #include <mm/mmu_decl.h>
44 #include <asm/tsi108_pci.h>
45 #include <asm/tsi108_irq.h>
50 #define DBG(fmt...) do { printk(fmt); } while(0)
52 #define DBG(fmt...) do { } while(0)
55 #define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
57 int mpc7448_hpc2_exclude_device(struct pci_controller *hose,
58 u_char bus, u_char devfn)
60 if (bus == 0 && PCI_SLOT(devfn) == 0)
61 return PCIBIOS_DEVICE_NOT_FOUND;
63 return PCIBIOS_SUCCESSFUL;
66 static void __init mpc7448_hpc2_setup_arch(void)
68 struct device_node *np;
70 ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
72 tsi108_csr_vir_base = get_vir_csrbase();
74 /* setup PCI host bridge */
76 for_each_compatible_node(np, "pci", "tsi108-pci")
77 tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0);
79 ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
81 ppc_md.progress("tsi108: resources set", 0x100);
84 printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
86 "Jointly ported by Freescale and Tundra Semiconductor\n");
88 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
92 * Interrupt setup and service. Interrupts on the mpc7448_hpc2 come
93 * from the four external INT pins, PCI interrupts are routed via
94 * PCI interrupt control registers, it generates internal IRQ23
96 * Interrupt routing on the Taiga Board:
97 * TSI108:PB_INT[0] -> CPU0:INT#
98 * TSI108:PB_INT[1] -> CPU0:MCP#
99 * TSI108:PB_INT[2] -> N/C
100 * TSI108:PB_INT[3] -> N/C
102 static void __init mpc7448_hpc2_init_IRQ(void)
106 unsigned int cascade_pci_irq;
107 struct device_node *tsi_pci;
108 struct device_node *cascade_node = NULL;
111 mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
112 MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
116 BUG_ON(mpic == NULL);
118 mpic_assign_isu(mpic, 0, mpic->paddr + 0x100);
123 tsi_pci = of_find_node_by_type(NULL, "pci");
124 if (tsi_pci == NULL) {
125 printk("%s: No tsi108 pci node found !\n", __func__);
128 cascade_node = of_find_node_by_type(NULL, "pic-router");
129 if (cascade_node == NULL) {
130 printk("%s: No tsi108 pci cascade node found !\n", __func__);
134 cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
135 DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__,
136 (u32) cascade_pci_irq);
137 tsi108_pci_int_init(cascade_node);
138 irq_set_handler_data(cascade_pci_irq, mpic);
139 irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
141 /* Configure MPIC outputs to CPU0 */
142 tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
145 void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
147 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
150 void mpc7448_hpc2_restart(char *cmd)
154 /* Set exception prefix high - to the firmware */
155 _nmask_and_or_msr(0, MSR_IP);
157 for (;;) ; /* Spin until reset happens */
160 void mpc7448_hpc2_power_off(void)
163 for (;;) ; /* No way to shut power off with software */
166 void mpc7448_hpc2_halt(void)
168 mpc7448_hpc2_power_off();
172 * Called very early, device-tree isn't unflattened
174 static int __init mpc7448_hpc2_probe(void)
176 unsigned long root = of_get_flat_dt_root();
178 if (!of_flat_dt_is_compatible(root, "mpc74xx"))
183 static int mpc7448_machine_check_exception(struct pt_regs *regs)
185 const struct exception_table_entry *entry;
187 /* Are we prepared to handle this fault */
188 if ((entry = search_exception_tables(regs->nip)) != NULL) {
189 tsi108_clear_pci_cfg_error();
191 regs->nip = entry->fixup;
197 define_machine(mpc7448_hpc2){
198 .name = "MPC7448 HPC2",
199 .probe = mpc7448_hpc2_probe,
200 .setup_arch = mpc7448_hpc2_setup_arch,
201 .init_IRQ = mpc7448_hpc2_init_IRQ,
202 .show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
203 .get_irq = mpic_get_irq,
204 .restart = mpc7448_hpc2_restart,
205 .calibrate_decr = generic_calibrate_decr,
206 .machine_check_exception= mpc7448_machine_check_exception,
207 .progress = udbg_progress,