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
|
/*
* Copyright 2004-2007, 2010 Freescale Semiconductor,
* Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/init.h>
#include <linux/module.h>
#include <asm/setup.h>
#include <mach/common.h>
#include <mach/hardware.h>
extern int mxc_early_serial_console_init(unsigned long base, struct clk *clk);
/*!
* @file plat-mxc/cpu_common.c
*
* @brief This file contains the common CPU initialization code.
*
* @ingroup MSL_MX31 MSL_MXC91321
*/
static void __init system_rev_setup(char **p)
{
system_rev = simple_strtoul(*p, NULL, 16);
}
__early_param("system_rev=", system_rev_setup);
int mxc_jtag_enabled; /* OFF: 0 (default), ON: 1 */
int uart_at_24; /* OFF: 0 (default); ON: 1 */
/*
* Here are the JTAG options from the command line. By default JTAG
* is OFF which means JTAG is not connected and WFI is enabled
*
* "on" -- JTAG is connected, so WFI is disabled
* "off" -- JTAG is disconnected, so WFI is enabled
*/
static void __init jtag_wfi_setup(char **p)
{
if (memcmp(*p, "on", 2) == 0) {
mxc_jtag_enabled = 1;
*p += 2;
} else if (memcmp(*p, "off", 3) == 0) {
mxc_jtag_enabled = 0;
*p += 3;
}
}
static void __init uart_parent_setup(char **p)
{
if (memcmp(*p, "on", 2) == 0) {
/* set the UART parent clock to be lp-apm */
uart_at_24 = 1;
*p += 2;
} else if (memcmp(*p, "off", 3) == 0) {
uart_at_24 = 0;
*p += 3;
}
}
__early_param("jtag=", jtag_wfi_setup);
__early_param("debug_uart=", uart_parent_setup);
void __init mxc_cpu_common_init(void)
{
pr_info("CPU is %s%x Revision %u.%u\n",
(mxc_cpu() < 0x100) ? "i.MX" : "MXC",
mxc_cpu(), mxc_cpu_rev_major(), mxc_cpu_rev_minor());
}
/**
* early_console_setup - setup debugging console
*
* Consoles started here require little enough setup that we can start using
* them very early in the boot process, either right after the machine
* vector initialization, or even before if the drivers can detect their hw.
*
* Returns non-zero if a console couldn't be setup.
* This function is developed based on
* early_console_setup function as defined in arch/ia64/kernel/setup.c
*/
void __init early_console_setup(unsigned long base, struct clk *clk)
{
#ifdef CONFIG_SERIAL_MXC_CONSOLE
mxc_early_serial_console_init(base, clk);
#endif
}
|
