summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/85xx/mpc8544_ds.c
blob: bec84ffe708e013ed88cabd8b261823da201d2c7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * MPC8544 DS Board Setup
 *
 * Author Xianghua Xiao (x.xiao@freescale.com)
 * Copyright 2007 Freescale Semiconductor Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/mpc85xx.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <asm/i8259.h>

#include <sysdev/fsl_soc.h>
#include "mpc85xx.h"

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#else
#define DBG(fmt, args...)
#endif


void __init mpc8544_ds_pic_init(void)
{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np = NULL;
#ifdef CONFIG_PPC_I8259
	struct device_node *cascade_node = NULL;
	int cascade_irq;
#endif

	np = of_find_node_by_type(np, "open-pic");

	if (np == NULL) {
		printk(KERN_ERR "Could not find open-pic node\n");
		return;
	}

	if (of_address_to_resource(np, 0, &r)) {
		printk(KERN_ERR "Failed to map mpic register space\n");
		of_node_put(np);
		return;
	}

	/* Alloc mpic structure and per isu has 16 INT entries. */
	mpic = mpic_alloc(np, r.start,
			  MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
			  16, 64, " OPENPIC     ");
	BUG_ON(mpic == NULL);

	/*
	 * 48 Internal Interrupts
	 */
	mpic_assign_isu(mpic, 0, r.start + 0x10200);
	mpic_assign_isu(mpic, 1, r.start + 0x10400);
	mpic_assign_isu(mpic, 2, r.start + 0x10600);

	/*
	 * 16 External interrupts
	 */
	mpic_assign_isu(mpic, 3, r.start + 0x10000);

	mpic_init(mpic);

#ifdef CONFIG_PPC_I8259
	/* Initialize the i8259 controller */
	for_each_node_by_type(np, "interrupt-controller")
	    if (of_device_is_compatible(np, "chrp,iic")) {
		cascade_node = np;
		break;
	}

	if (cascade_node == NULL) {
		printk(KERN_DEBUG "Could not find i8259 PIC\n");
		return;
	}

	cascade_irq = irq_of_parse_and_map(cascade_node, 0);
	if (cascade_irq == NO_IRQ) {
		printk(KERN_ERR "Failed to map cascade interrupt\n");
		return;
	}

	DBG("mpc8544ds: cascade mapped to irq %d\n", cascade_irq);

	i8259_init(cascade_node, 0);
	of_node_put(cascade_node);

	set_irq_chained_handler(cascade_irq, mpc8544_8259_cascade);
#endif	/* CONFIG_PPC_I8259 */
}


/*
 * Setup the architecture
 */
static void __init mpc8544_ds_setup_arch(void)
{
	if (ppc_md.progress)
		ppc_md.progress("mpc8544_ds_setup_arch()", 0);

	printk("MPC8544 DS board from Freescale Semiconductor\n");
}


/*
 * Called very early, device-tree isn't unflattened
 */
static int __init mpc8544_ds_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	return of_flat_dt_is_compatible(root, "MPC8544DS");
}

define_machine(mpc8544_ds) {
	.name			= "MPC8544 DS",
	.probe			= mpc8544_ds_probe,
	.setup_arch		= mpc8544_ds_setup_arch,
	.init_IRQ		= mpc8544_ds_pic_init,
	.get_irq		= mpic_get_irq,
	.restart		= mpc85xx_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};