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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* 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/init.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/mpc52xx.h>
/* ************************************************************************
*
* Setup the architecture
*
*/
/* mpc5200 device tree match tables */
static struct of_device_id mpc5200_cdm_ids[] __initdata = {
{ .compatible = "fsl,mpc5200-cdm", },
{ .compatible = "mpc5200-cdm", },
{}
};
static struct of_device_id mpc5200_gpio_ids[] __initdata = {
{ .compatible = "fsl,mpc5200-gpio", },
{ .compatible = "mpc5200-gpio", },
{}
};
/*
* Fix clock configuration.
*
* Firmware is supposed to be responsible for this. If you are creating a
* new board port, do *NOT* duplicate this code. Fix your boot firmware
* to set it correctly in the first place
*/
static void __init
lite5200_fix_clock_config(void)
{
struct device_node *np;
struct mpc52xx_cdm __iomem *cdm;
/* Map zones */
np = of_find_matching_node(NULL, mpc5200_cdm_ids);
cdm = of_iomap(np, 0);
of_node_put(np);
if (!cdm) {
printk(KERN_ERR "%s() failed; expect abnormal behaviour\n",
__FUNCTION__);
return;
}
/* Use internal 48 Mhz */
out_8(&cdm->ext_48mhz_en, 0x00);
out_8(&cdm->fd_enable, 0x01);
if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
out_be16(&cdm->fd_counters, 0x0001);
else
out_be16(&cdm->fd_counters, 0x5555);
/* Unmap the regs */
iounmap(cdm);
}
/*
* Fix setting of port_config register.
*
* Firmware is supposed to be responsible for this. If you are creating a
* new board port, do *NOT* duplicate this code. Fix your boot firmware
* to set it correctly in the first place
*/
static void __init
lite5200_fix_port_config(void)
{
struct device_node *np;
struct mpc52xx_gpio __iomem *gpio;
u32 port_config;
np = of_find_matching_node(NULL, mpc5200_gpio_ids);
gpio = of_iomap(np, 0);
of_node_put(np);
if (!gpio) {
printk(KERN_ERR "%s() failed. expect abnormal behavior\n",
__FUNCTION__);
return;
}
/* 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 */
iounmap(gpio);
}
#ifdef CONFIG_PM
static void lite5200_suspend_prepare(void __iomem *mbar)
{
u8 pin = 1; /* GPIO_WKUP_1 (GPIO_PSC2_4) */
u8 level = 0; /* wakeup on low level */
mpc52xx_set_wakeup_gpio(pin, level);
/*
* power down usb port
* this needs to be called before of-ohci suspend code
*/
/* set ports to "power switched" and "powered at the same time"
* USB Rh descriptor A: NPS = 0, PSM = 0 */
out_be32(mbar + 0x1048, in_be32(mbar + 0x1048) & ~0x300);
/* USB Rh status: LPS = 1 - turn off power */
out_be32(mbar + 0x1050, 0x00000001);
}
static void lite5200_resume_finish(void __iomem *mbar)
{
/* USB Rh status: LPSC = 1 - turn on power */
out_be32(mbar + 0x1050, 0x00010000);
}
#endif
static void __init lite5200_setup_arch(void)
{
if (ppc_md.progress)
ppc_md.progress("lite5200_setup_arch()", 0);
/* Map important registers from the internal memory map */
mpc52xx_map_common_devices();
/* Some mpc5200 & mpc5200b related configuration */
mpc5200_setup_xlb_arbiter();
/* Fix things that firmware should have done. */
lite5200_fix_clock_config();
lite5200_fix_port_config();
#ifdef CONFIG_PM
mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare;
mpc52xx_suspend.board_resume_finish = lite5200_resume_finish;
lite5200_pm_init();
#endif
mpc52xx_setup_pci();
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init lite5200_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, "fsl,lite5200") &&
!of_flat_dt_is_compatible(node, "fsl,lite5200b"))
return 0;
pr_debug("%s board found\n", model ? model : "unknown");
return 1;
}
define_machine(lite5200) {
.name = "lite5200",
.probe = lite5200_probe,
.setup_arch = lite5200_setup_arch,
.init = mpc52xx_declare_of_platform_devices,
.init_IRQ = mpc52xx_init_irq,
.get_irq = mpc52xx_get_irq,
.restart = mpc52xx_restart,
.calibrate_decr = generic_calibrate_decr,
};
|
