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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-lpc32xx/common.c
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2010 NXP Semiconductors
*/
#include <linux/init.h>
#include <asm/mach/map.h>
#include <asm/system_info.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include "common.h"
/*
* Returns the unique ID for the device
*/
void lpc32xx_get_uid(u32 devid[4])
{
int i;
for (i = 0; i < 4; i++)
devid[i] = __raw_readl(LPC32XX_CLKPWR_DEVID(i << 2));
}
/*
* Detects and returns IRAM size for the device variation
*/
#define LPC32XX_IRAM_BANK_SIZE SZ_128K
static u32 iram_size;
u32 lpc32xx_return_iram_size(void)
{
if (iram_size == 0) {
u32 savedval1, savedval2;
void __iomem *iramptr1, *iramptr2;
iramptr1 = io_p2v(LPC32XX_IRAM_BASE);
iramptr2 = io_p2v(LPC32XX_IRAM_BASE + LPC32XX_IRAM_BANK_SIZE);
savedval1 = __raw_readl(iramptr1);
savedval2 = __raw_readl(iramptr2);
if (savedval1 == savedval2) {
__raw_writel(savedval2 + 1, iramptr2);
if (__raw_readl(iramptr1) == savedval2 + 1)
iram_size = LPC32XX_IRAM_BANK_SIZE;
else
iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
__raw_writel(savedval2, iramptr2);
} else
iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
}
return iram_size;
}
EXPORT_SYMBOL_GPL(lpc32xx_return_iram_size);
static struct map_desc lpc32xx_io_desc[] __initdata = {
{
.virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START),
.pfn = __phys_to_pfn(LPC32XX_AHB0_START),
.length = LPC32XX_AHB0_SIZE,
.type = MT_DEVICE
},
{
.virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START),
.pfn = __phys_to_pfn(LPC32XX_AHB1_START),
.length = LPC32XX_AHB1_SIZE,
.type = MT_DEVICE
},
{
.virtual = (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START),
.pfn = __phys_to_pfn(LPC32XX_FABAPB_START),
.length = LPC32XX_FABAPB_SIZE,
.type = MT_DEVICE
},
{
.virtual = (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE),
.pfn = __phys_to_pfn(LPC32XX_IRAM_BASE),
.length = (LPC32XX_IRAM_BANK_SIZE * 2),
.type = MT_DEVICE
},
};
void __init lpc32xx_map_io(void)
{
iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc));
}
static int __init lpc32xx_check_uid(void)
{
u32 uid[4];
lpc32xx_get_uid(uid);
printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
uid[3], uid[2], uid[1], uid[0]);
if (!system_serial_low && !system_serial_high) {
system_serial_low = uid[0];
system_serial_high = uid[1];
}
return 1;
}
arch_initcall(lpc32xx_check_uid);
|
