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/seq_file.h>
29 #include <linux/root_dev.h>
30 #include <linux/serial.h>
31 #include <linux/tty.h>
32 #include <linux/serial_core.h>
34 #include <asm/system.h>
36 #include <asm/machdep.h>
39 #include <asm/tsi108.h>
40 #include <asm/pci-bridge.h>
42 #include <mm/mmu_decl.h>
43 #include <asm/tsi108_pci.h>
44 #include <asm/tsi108_irq.h>
49 #define DBG(fmt...) do { printk(fmt); } while(0)
51 #define DBG(fmt...) do { } while(0)
54 #define MPC7448HPC2_PCI_CFG_PHYS 0xfb000000
56 extern void _nmask_and_or_msr(unsigned long nmask
, unsigned long or_val
);
58 int mpc7448_hpc2_exclude_device(struct pci_controller
*hose
,
59 u_char bus
, u_char devfn
)
61 if (bus
== 0 && PCI_SLOT(devfn
) == 0)
62 return PCIBIOS_DEVICE_NOT_FOUND
;
64 return PCIBIOS_SUCCESSFUL
;
67 static void __init
mpc7448_hpc2_setup_arch(void)
69 struct device_node
*np
;
71 ppc_md
.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
73 tsi108_csr_vir_base
= get_vir_csrbase();
75 /* setup PCI host bridge */
77 for (np
= NULL
; (np
= of_find_node_by_type(np
, "pci")) != NULL
;)
78 tsi108_setup_pci(np
, MPC7448HPC2_PCI_CFG_PHYS
, 0);
80 ppc_md
.pci_exclude_device
= mpc7448_hpc2_exclude_device
;
82 ppc_md
.progress("tsi108: resources set", 0x100);
85 printk(KERN_INFO
"MPC7448HPC2 (TAIGA) Platform\n");
87 "Jointly ported by Freescale and Tundra Semiconductor\n");
89 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
93 * Interrupt setup and service. Interrupts on the mpc7448_hpc2 come
94 * from the four external INT pins, PCI interrupts are routed via
95 * PCI interrupt control registers, it generates internal IRQ23
97 * Interrupt routing on the Taiga Board:
98 * TSI108:PB_INT[0] -> CPU0:INT#
99 * TSI108:PB_INT[1] -> CPU0:MCP#
100 * TSI108:PB_INT[2] -> N/C
101 * TSI108:PB_INT[3] -> N/C
103 static void __init
mpc7448_hpc2_init_IRQ(void)
106 phys_addr_t mpic_paddr
= 0;
107 struct device_node
*tsi_pic
;
109 unsigned int cascade_pci_irq
;
110 struct device_node
*tsi_pci
;
111 struct device_node
*cascade_node
= NULL
;
114 tsi_pic
= of_find_node_by_type(NULL
, "open-pic");
117 const void *prop
= of_get_property(tsi_pic
, "reg", &size
);
118 mpic_paddr
= of_translate_address(tsi_pic
, prop
);
121 if (mpic_paddr
== 0) {
122 printk("%s: No tsi108 PIC found !\n", __FUNCTION__
);
126 DBG("%s: tsi108 pic phys_addr = 0x%x\n", __FUNCTION__
,
129 mpic
= mpic_alloc(tsi_pic
, mpic_paddr
,
130 MPIC_PRIMARY
| MPIC_BIG_ENDIAN
| MPIC_WANTS_RESET
|
131 MPIC_SPV_EOI
| MPIC_NO_PTHROU_DIS
| MPIC_REGSET_TSI108
,
133 NR_IRQS
-4, /* num_sources used */
136 BUG_ON(mpic
== NULL
);
138 mpic_assign_isu(mpic
, 0, mpic_paddr
+ 0x100);
143 tsi_pci
= of_find_node_by_type(NULL
, "pci");
144 if (tsi_pci
== NULL
) {
145 printk("%s: No tsi108 pci node found !\n", __FUNCTION__
);
148 cascade_node
= of_find_node_by_type(NULL
, "pic-router");
149 if (cascade_node
== NULL
) {
150 printk("%s: No tsi108 pci cascade node found !\n", __FUNCTION__
);
154 cascade_pci_irq
= irq_of_parse_and_map(tsi_pci
, 0);
155 DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __FUNCTION__
,
156 (u32
) cascade_pci_irq
);
157 tsi108_pci_int_init(cascade_node
);
158 set_irq_data(cascade_pci_irq
, mpic
);
159 set_irq_chained_handler(cascade_pci_irq
, tsi108_irq_cascade
);
161 /* Configure MPIC outputs to CPU0 */
162 tsi108_write_reg(TSI108_MPIC_OFFSET
+ 0x30c, 0);
163 of_node_put(tsi_pic
);
166 void mpc7448_hpc2_show_cpuinfo(struct seq_file
*m
)
168 seq_printf(m
, "vendor\t\t: Freescale Semiconductor\n");
169 seq_printf(m
, "machine\t\t: MPC7448hpc2\n");
172 void mpc7448_hpc2_restart(char *cmd
)
176 /* Set exception prefix high - to the firmware */
177 _nmask_and_or_msr(0, MSR_IP
);
179 for (;;) ; /* Spin until reset happens */
182 void mpc7448_hpc2_power_off(void)
185 for (;;) ; /* No way to shut power off with software */
188 void mpc7448_hpc2_halt(void)
190 mpc7448_hpc2_power_off();
194 * Called very early, device-tree isn't unflattened
196 static int __init
mpc7448_hpc2_probe(void)
198 unsigned long root
= of_get_flat_dt_root();
200 if (!of_flat_dt_is_compatible(root
, "mpc74xx"))
205 static int mpc7448_machine_check_exception(struct pt_regs
*regs
)
207 const struct exception_table_entry
*entry
;
209 /* Are we prepared to handle this fault */
210 if ((entry
= search_exception_tables(regs
->nip
)) != NULL
) {
211 tsi108_clear_pci_cfg_error();
213 regs
->nip
= entry
->fixup
;
219 define_machine(mpc7448_hpc2
){
220 .name
= "MPC7448 HPC2",
221 .probe
= mpc7448_hpc2_probe
,
222 .setup_arch
= mpc7448_hpc2_setup_arch
,
223 .init_IRQ
= mpc7448_hpc2_init_IRQ
,
224 .show_cpuinfo
= mpc7448_hpc2_show_cpuinfo
,
225 .get_irq
= mpic_get_irq
,
226 .restart
= mpc7448_hpc2_restart
,
227 .calibrate_decr
= generic_calibrate_decr
,
228 .machine_check_exception
= mpc7448_machine_check_exception
,
229 .progress
= udbg_progress
,