aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/83xx/mpc834x_sys.c
blob: 3e1c16eb4a639bf8d03f63614b674500d34e087b (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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
 * arch/powerpc/platforms/83xx/mpc834x_sys.c
 *
 * MPC834x SYS board specific routines
 *
 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
 *
 * 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/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ipic.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>

#include "mpc83xx.h"

#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
#endif

#ifdef CONFIG_PCI
static int
mpc83xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     *      PCI IDSEL/INTPIN->INTLINE
	     *       A      B      C      D
	     */
	{
		{PIRQA, PIRQB, PIRQC, PIRQD},	/* idsel 0x11 */
		{PIRQC, PIRQD, PIRQA, PIRQB},	/* idsel 0x12 */
		{PIRQD, PIRQA, PIRQB, PIRQC},	/* idsel 0x13 */
		{0, 0, 0, 0},
		{PIRQA, PIRQB, PIRQC, PIRQD},	/* idsel 0x15 */
		{PIRQD, PIRQA, PIRQB, PIRQC},	/* idsel 0x16 */
		{PIRQC, PIRQD, PIRQA, PIRQB},	/* idsel 0x17 */
		{PIRQB, PIRQC, PIRQD, PIRQA},	/* idsel 0x18 */
		{0, 0, 0, 0},			/* idsel 0x19 */
		{0, 0, 0, 0},			/* idsel 0x20 */
	};

	const long min_idsel = 0x11, max_idsel = 0x20, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
}
#endif				/* CONFIG_PCI */

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
static void __init mpc834x_sys_setup_arch(void)
{
	struct device_node *np;

	if (ppc_md.progress)
		ppc_md.progress("mpc834x_sys_setup_arch()", 0);

	np = of_find_node_by_type(NULL, "cpu");
	if (np != 0) {
		unsigned int *fp =
		    (int *)get_property(np, "clock-frequency", NULL);
		if (fp != 0)
			loops_per_jiffy = *fp / HZ;
		else
			loops_per_jiffy = 50000000 / HZ;
		of_node_put(np);
	}
#ifdef CONFIG_PCI
	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
		add_bridge(np);

	ppc_md.pci_swizzle = common_swizzle;
	ppc_md.pci_map_irq = mpc83xx_map_irq;
	ppc_md.pci_exclude_device = mpc83xx_exclude_device;
#endif

#ifdef  CONFIG_ROOT_NFS
	ROOT_DEV = Root_NFS;
#else
	ROOT_DEV = Root_HDA1;
#endif
}

void __init mpc834x_sys_init_IRQ(void)
{
	u8 senses[8] = {
		0,			/* EXT 0 */
		IRQ_SENSE_LEVEL,	/* EXT 1 */
		IRQ_SENSE_LEVEL,	/* EXT 2 */
		0,			/* EXT 3 */
#ifdef CONFIG_PCI
		IRQ_SENSE_LEVEL,	/* EXT 4 */
		IRQ_SENSE_LEVEL,	/* EXT 5 */
		IRQ_SENSE_LEVEL,	/* EXT 6 */
		IRQ_SENSE_LEVEL,	/* EXT 7 */
#else
		0,			/* EXT 4 */
		0,			/* EXT 5 */
		0,			/* EXT 6 */
		0,			/* EXT 7 */
#endif
	};

	ipic_init(get_immrbase() + 0x00700, 0, 0, senses, 8);

	/* Initialize the default interrupt mapping priorities,
	 * in case the boot rom changed something on us.
	 */
	ipic_set_default_priority();
}

#if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374)
extern ulong ds1374_get_rtc_time(void);
extern int ds1374_set_rtc_time(ulong);

static int __init mpc834x_rtc_hookup(void)
{
	struct timespec tv;

	ppc_md.get_rtc_time = ds1374_get_rtc_time;
	ppc_md.set_rtc_time = ds1374_set_rtc_time;

	tv.tv_nsec = 0;
	tv.tv_sec = (ppc_md.get_rtc_time) ();
	do_settimeofday(&tv);

	return 0;
}

late_initcall(mpc834x_rtc_hookup);
#endif

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init mpc834x_sys_probe(void)
{
	/* We always match for now, eventually we should look at the flat
	   dev tree to ensure this is the board we are suppose to run on
	*/
	return 1;
}

define_machine(mpc834x_sys) {
	.name			= "MPC834x SYS",
	.probe			= mpc834x_sys_probe,
	.setup_arch		= mpc834x_sys_setup_arch,
	.init_IRQ		= mpc834x_sys_init_IRQ,
	.get_irq		= ipic_get_irq,
	.restart		= mpc83xx_restart,
	.time_init		= mpc83xx_time_init,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};