1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Board setup routines for the Freescale mpc7448hpc2(taiga) platform
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
14 * Copyright 2004-2006 Freescale Semiconductor, Inc.
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>
32 #include <asm/machdep.h>
35 #include <asm/tsi108.h>
36 #include <asm/pci-bridge.h>
38 #include <mm/mmu_decl.h>
39 #include <asm/tsi108_pci.h>
40 #include <asm/tsi108_irq.h>
45 #define DBG(fmt...) do { printk(fmt); } while(0)
47 #define DBG(fmt...) do { } while(0)
50 #define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
52 int mpc7448_hpc2_exclude_device(struct pci_controller *hose,
53 u_char bus, u_char devfn)
55 if (bus == 0 && PCI_SLOT(devfn) == 0)
56 return PCIBIOS_DEVICE_NOT_FOUND;
58 return PCIBIOS_SUCCESSFUL;
61 static void __init mpc7448_hpc2_setup_arch(void)
63 struct device_node *np;
65 ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
67 tsi108_csr_vir_base = get_vir_csrbase();
69 /* setup PCI host bridge */
71 for_each_compatible_node(np, "pci", "tsi108-pci")
72 tsi108_setup_pci(np, MPC7448HPC2_PCI_CFG_PHYS, 0);
74 ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
76 ppc_md.progress("tsi108: resources set", 0x100);
79 printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
81 "Jointly ported by Freescale and Tundra Semiconductor\n");
83 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
87 * Interrupt setup and service. Interrupts on the mpc7448_hpc2 come
88 * from the four external INT pins, PCI interrupts are routed via
89 * PCI interrupt control registers, it generates internal IRQ23
91 * Interrupt routing on the Taiga Board:
92 * TSI108:PB_INT[0] -> CPU0:INT#
93 * TSI108:PB_INT[1] -> CPU0:MCP#
94 * TSI108:PB_INT[2] -> N/C
95 * TSI108:PB_INT[3] -> N/C
97 static void __init mpc7448_hpc2_init_IRQ(void)
101 unsigned int cascade_pci_irq;
102 struct device_node *tsi_pci;
103 struct device_node *cascade_node = NULL;
106 mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
107 MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
111 BUG_ON(mpic == NULL);
113 mpic_assign_isu(mpic, 0, mpic->paddr + 0x100);
118 tsi_pci = of_find_node_by_type(NULL, "pci");
119 if (tsi_pci == NULL) {
120 printk("%s: No tsi108 pci node found !\n", __func__);
123 cascade_node = of_find_node_by_type(NULL, "pic-router");
124 if (cascade_node == NULL) {
125 printk("%s: No tsi108 pci cascade node found !\n", __func__);
129 cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
130 DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__,
131 (u32) cascade_pci_irq);
132 tsi108_pci_int_init(cascade_node);
133 irq_set_handler_data(cascade_pci_irq, mpic);
134 irq_set_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
136 /* Configure MPIC outputs to CPU0 */
137 tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
140 void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
142 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
145 static void __noreturn mpc7448_hpc2_restart(char *cmd)
149 /* Set exception prefix high - to the firmware */
150 mtmsr(mfmsr() | MSR_IP);
153 for (;;) ; /* Spin until reset happens */
157 * Called very early, device-tree isn't unflattened
159 static int __init mpc7448_hpc2_probe(void)
161 if (!of_machine_is_compatible("mpc74xx"))
166 static int mpc7448_machine_check_exception(struct pt_regs *regs)
168 const struct exception_table_entry *entry;
170 /* Are we prepared to handle this fault */
171 if ((entry = search_exception_tables(regs->nip)) != NULL) {
172 tsi108_clear_pci_cfg_error();
174 regs->nip = extable_fixup(entry);
180 define_machine(mpc7448_hpc2){
181 .name = "MPC7448 HPC2",
182 .probe = mpc7448_hpc2_probe,
183 .setup_arch = mpc7448_hpc2_setup_arch,
184 .init_IRQ = mpc7448_hpc2_init_IRQ,
185 .show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
186 .get_irq = mpic_get_irq,
187 .restart = mpc7448_hpc2_restart,
188 .calibrate_decr = generic_calibrate_decr,
189 .machine_check_exception= mpc7448_machine_check_exception,
190 .progress = udbg_progress,