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
|
/*
* Freescale Lite5200 board support
*
* Written by: Grant Likely <grant.likely@secretlab.ca>
*
* Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
* Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
*
* Description:
* 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.
*/
#undef DEBUG
#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 <linux/initrd.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 <asm/of_platform.h>
#include <asm/mpc52xx.h>
/* ************************************************************************
*
* Setup the architecture
*
*/
static void __init
lite52xx_setup_cpu(void)
{
struct mpc52xx_gpio __iomem *gpio;
u32 port_config;
/* Map zones */
gpio = mpc52xx_find_and_map("mpc52xx-gpio");
if (!gpio) {
printk(KERN_ERR __FILE__ ": "
"Error while mapping GPIO register for port config. "
"Expect some abnormal behavior\n");
goto error;
}
/* Set port config */
port_config = in_be32(&gpio->port_config);
port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
port_config &= ~0x00007000; /* USB port : Differential mode */
port_config |= 0x00001000; /* USB 1 only */
port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
port_config |= 0x01000000;
pr_debug("port_config: old:%x new:%x\n",
in_be32(&gpio->port_config), port_config);
out_be32(&gpio->port_config, port_config);
/* Unmap zone */
error:
iounmap(gpio);
}
static void __init lite52xx_setup_arch(void)
{
struct device_node *np;
if (ppc_md.progress)
ppc_md.progress("lite52xx_setup_arch()", 0);
np = of_find_node_by_type(NULL, "cpu");
if (np) {
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);
}
/* CPU & Port mux setup */
mpc52xx_setup_cpu(); /* Generic */
lite52xx_setup_cpu(); /* Platorm specific */
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
}
void lite52xx_show_cpuinfo(struct seq_file *m)
{
struct device_node* np = of_find_all_nodes(NULL);
const char *model = NULL;
if (np)
model = get_property(np, "model", NULL);
seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown");
of_node_put(np);
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init lite52xx_probe(void)
{
unsigned long node = of_get_flat_dt_root();
const char *model = of_get_flat_dt_prop(node, "model", NULL);
if (!of_flat_dt_is_compatible(node, "lite52xx"))
return 0;
pr_debug("%s board w/ mpc52xx found\n", model ? model : "unknown");
return 1;
}
define_machine(lite52xx) {
.name = "lite52xx",
.probe = lite52xx_probe,
.setup_arch = lite52xx_setup_arch,
.init = mpc52xx_declare_of_platform_devices,
.init_IRQ = mpc52xx_init_irq,
.get_irq = mpc52xx_get_irq,
.show_cpuinfo = lite52xx_show_cpuinfo,
.calibrate_decr = generic_calibrate_decr,
};
|
