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/config.h>
22 #include <linux/stddef.h>
23 #include <linux/kernel.h>
24 #include <linux/pci.h>
25 #include <linux/kdev_t.h>
26 #include <linux/console.h>
27 #include <linux/delay.h>
28 #include <linux/irq.h>
29 #include <linux/ide.h>
30 #include <linux/seq_file.h>
31 #include <linux/root_dev.h>
32 #include <linux/serial.h>
33 #include <linux/tty.h>
34 #include <linux/serial_core.h>
36 #include <asm/system.h>
38 #include <asm/machdep.h>
41 #include <asm/tsi108.h>
42 #include <asm/pci-bridge.h>
44 #include <mm/mmu_decl.h>
45 #include "mpc7448_hpc2.h"
46 #include <asm/tsi108_irq.h>
51 #define DBG(fmt...) do { printk(fmt); } while(0)
53 #define DBG(fmt...) do { } while(0)
57 isa_io_base
= MPC7448_HPC2_ISA_IO_BASE
;
58 isa_mem_base
= MPC7448_HPC2_ISA_MEM_BASE
;
59 pci_dram_offset
= MPC7448_HPC2_PCI_MEM_OFFSET
;
62 extern int tsi108_setup_pci(struct device_node
*dev
);
63 extern void _nmask_and_or_msr(unsigned long nmask
, unsigned long or_val
);
64 extern void tsi108_pci_int_init(void);
65 extern void tsi108_irq_cascade(unsigned int irq
, struct irq_desc
*desc
,
66 struct pt_regs
*regs
);
68 int mpc7448_hpc2_exclude_device(u_char bus
, u_char devfn
)
70 if (bus
== 0 && PCI_SLOT(devfn
) == 0)
71 return PCIBIOS_DEVICE_NOT_FOUND
;
73 return PCIBIOS_SUCCESSFUL
;
77 * find pci slot by devfn in interrupt map of OF tree
79 u8
find_slot_by_devfn(unsigned int *interrupt_map
, unsigned int devfn
)
83 for (i
= 0; i
< 4; i
++){
84 tmp
= interrupt_map
[i
*4*7];
85 if ((tmp
>> 11) == (devfn
>> 3))
92 * Scans the interrupt map for pci device
94 void mpc7448_hpc2_fixup_irq(struct pci_dev
*dev
)
96 struct pci_controller
*hose
;
97 struct device_node
*node
;
98 unsigned int *interrupt
;
104 /* Lookup the hose */
105 busnr
= dev
->bus
->number
;
106 hose
= pci_bus_to_hose(busnr
);
108 printk(KERN_ERR
"No pci hose found\n");
110 /* Check it has an OF node associated */
111 node
= (struct device_node
*) hose
->arch_data
;
113 printk(KERN_ERR
"No pci node found\n");
115 interrupt
= (unsigned int *) get_property(node
, "interrupt-map", &len
);
116 slot
= find_slot_by_devfn(interrupt
, dev
->devfn
);
117 pci_read_config_byte(dev
, PCI_INTERRUPT_PIN
, &pin
);
118 if (pin
== 0 || pin
> 4)
121 dev
->irq
= interrupt
[slot
*4*7 + pin
*7 + 5];
122 DBG("TSI_PCI: dev->irq = 0x%x\n", dev
->irq
);
124 /* temporary pci irq map fixup*/
126 void __init
mpc7448_hpc2_pcibios_fixup(void)
128 struct pci_dev
*dev
= NULL
;
129 for_each_pci_dev(dev
) {
130 mpc7448_hpc2_fixup_irq(dev
);
131 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, dev
->irq
);
135 static void __init
mpc7448_hpc2_setup_arch(void)
137 struct device_node
*cpu
;
138 struct device_node
*np
;
140 ppc_md
.progress("mpc7448_hpc2_setup_arch():set_bridge", 0);
142 cpu
= of_find_node_by_type(NULL
, "cpu");
146 fp
= (int *)get_property(cpu
, "clock-frequency", NULL
);
148 loops_per_jiffy
= *fp
/ HZ
;
150 loops_per_jiffy
= 50000000 / HZ
;
153 tsi108_csr_vir_base
= get_vir_csrbase();
155 #ifdef CONFIG_ROOT_NFS
158 ROOT_DEV
= Root_HDA1
;
161 #ifdef CONFIG_BLK_DEV_INITRD
162 ROOT_DEV
= Root_RAM0
;
165 /* setup PCI host bridge */
167 for (np
= NULL
; (np
= of_find_node_by_type(np
, "pci")) != NULL
;)
168 tsi108_setup_pci(np
);
170 ppc_md
.pci_exclude_device
= mpc7448_hpc2_exclude_device
;
172 ppc_md
.progress("tsi108: resources set", 0x100);
175 printk(KERN_INFO
"MPC7448HPC2 (TAIGA) Platform\n");
177 "Jointly ported by Freescale and Tundra Semiconductor\n");
179 "Enabling L2 cache then enabling the HID0 prefetch engine.\n");
183 * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come
184 * from the four external INT pins, PCI interrupts are routed via
185 * PCI interrupt control registers, it generates internal IRQ23
187 * Interrupt routing on the Taiga Board:
188 * TSI108:PB_INT[0] -> CPU0:INT#
189 * TSI108:PB_INT[1] -> CPU0:MCP#
190 * TSI108:PB_INT[2] -> N/C
191 * TSI108:PB_INT[3] -> N/C
193 static void __init
mpc7448_hpc2_init_IRQ(void)
196 phys_addr_t mpic_paddr
= 0;
197 unsigned int cascade_pci_irq
;
198 struct device_node
*tsi_pci
;
199 struct device_node
*tsi_pic
;
201 tsi_pic
= of_find_node_by_type(NULL
, "open-pic");
204 void *prop
= get_property(tsi_pic
, "reg", &size
);
205 mpic_paddr
= of_translate_address(tsi_pic
, prop
);
208 if (mpic_paddr
== 0) {
209 printk("%s: No tsi108 PIC found !\n", __FUNCTION__
);
213 DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__
,
216 mpic
= mpic_alloc(tsi_pic
, mpic_paddr
,
217 MPIC_PRIMARY
| MPIC_BIG_ENDIAN
| MPIC_WANTS_RESET
|
218 MPIC_SPV_EOI
| MPIC_NO_PTHROU_DIS
| MPIC_REGSET_TSI108
,
219 0, /* num_sources used */
220 0, /* num_sources used */
223 BUG_ON(mpic
== NULL
); /* XXXX */
226 tsi_pci
= of_find_node_by_type(NULL
, "pci");
228 printk("%s: No tsi108 pci node found !\n", __FUNCTION__
);
232 cascade_pci_irq
= irq_of_parse_and_map(tsi_pci
, 0);
233 set_irq_data(cascade_pci_irq
, mpic
);
234 set_irq_chained_handler(cascade_pci_irq
, tsi108_irq_cascade
);
236 tsi108_pci_int_init();
238 /* Configure MPIC outputs to CPU0 */
239 tsi108_write_reg(TSI108_MPIC_OFFSET
+ 0x30c, 0);
240 of_node_put(tsi_pic
);
243 void mpc7448_hpc2_show_cpuinfo(struct seq_file
*m
)
245 seq_printf(m
, "vendor\t\t: Freescale Semiconductor\n");
246 seq_printf(m
, "machine\t\t: MPC7448hpc2\n");
249 void mpc7448_hpc2_restart(char *cmd
)
253 /* Set exception prefix high - to the firmware */
254 _nmask_and_or_msr(0, MSR_IP
);
256 for (;;) ; /* Spin until reset happens */
259 void mpc7448_hpc2_power_off(void)
262 for (;;) ; /* No way to shut power off with software */
265 void mpc7448_hpc2_halt(void)
267 mpc7448_hpc2_power_off();
271 * Called very early, device-tree isn't unflattened
273 static int __init
mpc7448_hpc2_probe(void)
275 unsigned long root
= of_get_flat_dt_root();
277 if (!of_flat_dt_is_compatible(root
, "mpc74xx"))
282 static int mpc7448_machine_check_exception(struct pt_regs
*regs
)
284 extern void tsi108_clear_pci_cfg_error(void);
285 const struct exception_table_entry
*entry
;
287 /* Are we prepared to handle this fault */
288 if ((entry
= search_exception_tables(regs
->nip
)) != NULL
) {
289 tsi108_clear_pci_cfg_error();
291 regs
->nip
= entry
->fixup
;
298 define_machine(mpc7448_hpc2
){
299 .name
= "MPC7448 HPC2",
300 .probe
= mpc7448_hpc2_probe
,
301 .setup_arch
= mpc7448_hpc2_setup_arch
,
302 .init_IRQ
= mpc7448_hpc2_init_IRQ
,
303 .show_cpuinfo
= mpc7448_hpc2_show_cpuinfo
,
304 .get_irq
= mpic_get_irq
,
305 .pcibios_fixup
= mpc7448_hpc2_pcibios_fixup
,
306 .restart
= mpc7448_hpc2_restart
,
307 .calibrate_decr
= generic_calibrate_decr
,
308 .machine_check_exception
= mpc7448_machine_check_exception
,
309 .progress
= udbg_progress
,