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/delay.h>
27 #include <linux/irq.h>
28 #include <linux/ide.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 "mpc7448_hpc2.h"
45 #include <asm/tsi108_irq.h>
50 #define DBG(fmt...) do { printk(fmt); } while(0)
52 #define DBG(fmt...) do { } while(0)
56 isa_io_base = MPC7448_HPC2_ISA_IO_BASE;
57 isa_mem_base = MPC7448_HPC2_ISA_MEM_BASE;
58 pci_dram_offset = MPC7448_HPC2_PCI_MEM_OFFSET;
61 extern int tsi108_setup_pci(struct device_node *dev);
62 extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
63 extern void tsi108_pci_int_init(struct device_node *node);
64 extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc);
66 int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn)
68 if (bus == 0 && PCI_SLOT(devfn) == 0)
69 return PCIBIOS_DEVICE_NOT_FOUND;
71 return PCIBIOS_SUCCESSFUL;
74 static void __init mpc7448_hpc2_setup_arch(void)
76 struct device_node *cpu;
77 struct device_node *np;
79 ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
81 cpu = of_find_node_by_type(NULL, "cpu");
83 const unsigned int *fp;
85 fp = get_property(cpu, "clock-frequency", NULL);
87 loops_per_jiffy = *fp / HZ;
89 loops_per_jiffy = 50000000 / HZ;
92 tsi108_csr_vir_base = get_vir_csrbase();
94 #ifdef CONFIG_ROOT_NFS
100 #ifdef CONFIG_BLK_DEV_INITRD
101 ROOT_DEV = Root_RAM0;
104 /* setup PCI host bridge */
106 for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
107 tsi108_setup_pci(np);
109 ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device;
111 ppc_md.progress("tsi108: resources set", 0x100);
114 printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n");
116 "Jointly ported by Freescale and Tundra Semiconductor\n");
118 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
122 * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come
123 * from the four external INT pins, PCI interrupts are routed via
124 * PCI interrupt control registers, it generates internal IRQ23
126 * Interrupt routing on the Taiga Board:
127 * TSI108:PB_INT[0] -> CPU0:INT#
128 * TSI108:PB_INT[1] -> CPU0:MCP#
129 * TSI108:PB_INT[2] -> N/C
130 * TSI108:PB_INT[3] -> N/C
132 static void __init mpc7448_hpc2_init_IRQ(void)
135 phys_addr_t mpic_paddr = 0;
136 struct device_node *tsi_pic;
138 unsigned int cascade_pci_irq;
139 struct device_node *tsi_pci;
140 struct device_node *cascade_node = NULL;
143 tsi_pic = of_find_node_by_type(NULL, "open-pic");
146 const void *prop = get_property(tsi_pic, "reg", &size);
147 mpic_paddr = of_translate_address(tsi_pic, prop);
150 if (mpic_paddr == 0) {
151 printk("%s: No tsi108 PIC found !\n", __FUNCTION__);
155 DBG("%s: tsi108 pic phys_addr = 0x%x\n", __FUNCTION__,
158 mpic = mpic_alloc(tsi_pic, mpic_paddr,
159 MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
160 MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
162 NR_IRQS-4, /* num_sources used */
165 BUG_ON(mpic == NULL);
167 mpic_assign_isu(mpic, 0, mpic_paddr + 0x100);
172 tsi_pci = of_find_node_by_type(NULL, "pci");
173 if (tsi_pci == NULL) {
174 printk("%s: No tsi108 pci node found !\n", __FUNCTION__);
177 cascade_node = of_find_node_by_type(NULL, "pic-router");
178 if (cascade_node == NULL) {
179 printk("%s: No tsi108 pci cascade node found !\n", __FUNCTION__);
183 cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
184 DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __FUNCTION__,
185 (u32) cascade_pci_irq);
186 tsi108_pci_int_init(cascade_node);
187 set_irq_data(cascade_pci_irq, mpic);
188 set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
190 /* Configure MPIC outputs to CPU0 */
191 tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
192 of_node_put(tsi_pic);
195 void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
197 seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
198 seq_printf(m, "machine\t\t: MPC7448hpc2\n");
201 void mpc7448_hpc2_restart(char *cmd)
205 /* Set exception prefix high - to the firmware */
206 _nmask_and_or_msr(0, MSR_IP);
208 for (;;) ; /* Spin until reset happens */
211 void mpc7448_hpc2_power_off(void)
214 for (;;) ; /* No way to shut power off with software */
217 void mpc7448_hpc2_halt(void)
219 mpc7448_hpc2_power_off();
223 * Called very early, device-tree isn't unflattened
225 static int __init mpc7448_hpc2_probe(void)
227 unsigned long root = of_get_flat_dt_root();
229 if (!of_flat_dt_is_compatible(root, "mpc74xx"))
234 static int mpc7448_machine_check_exception(struct pt_regs *regs)
236 extern void tsi108_clear_pci_cfg_error(void);
237 const struct exception_table_entry *entry;
239 /* Are we prepared to handle this fault */
240 if ((entry = search_exception_tables(regs->nip)) != NULL) {
241 tsi108_clear_pci_cfg_error();
243 regs->nip = entry->fixup;
249 define_machine(mpc7448_hpc2){
250 .name = "MPC7448 HPC2",
251 .probe = mpc7448_hpc2_probe,
252 .setup_arch = mpc7448_hpc2_setup_arch,
253 .init_IRQ = mpc7448_hpc2_init_IRQ,
254 .show_cpuinfo = mpc7448_hpc2_show_cpuinfo,
255 .get_irq = mpic_get_irq,
256 .restart = mpc7448_hpc2_restart,
257 .calibrate_decr = generic_calibrate_decr,
258 .machine_check_exception= mpc7448_machine_check_exception,
259 .progress = udbg_progress,