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
|
/*
* linux/arch/arm/plat-omap/common.c
*
* Code common to all OMAP machines.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/console.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/clk.h>
#include <asm/hardware.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/arch/board.h>
#include <asm/arch/mux.h>
#include <asm/arch/fpga.h>
#include <asm/arch/clock.h>
#define NO_LENGTH_CHECK 0xffffffff
unsigned char omap_bootloader_tag[512];
int omap_bootloader_tag_len;
struct omap_board_config_kernel *omap_board_config;
int omap_board_config_size;
static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
{
struct omap_board_config_kernel *kinfo = NULL;
int i;
#ifdef CONFIG_OMAP_BOOT_TAG
struct omap_board_config_entry *info = NULL;
if (omap_bootloader_tag_len > 4)
info = (struct omap_board_config_entry *) omap_bootloader_tag;
while (info != NULL) {
u8 *next;
if (info->tag == tag) {
if (skip == 0)
break;
skip--;
}
if ((info->len & 0x03) != 0) {
/* We bail out to avoid an alignment fault */
printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
info->len, info->tag);
return NULL;
}
next = (u8 *) info + sizeof(*info) + info->len;
if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
info = NULL;
else
info = (struct omap_board_config_entry *) next;
}
if (info != NULL) {
/* Check the length as a lame attempt to check for
* binary inconsistancy. */
if (len != NO_LENGTH_CHECK) {
/* Word-align len */
if (len & 0x03)
len = (len + 3) & ~0x03;
if (info->len != len) {
printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
tag, len, info->len);
return NULL;
}
}
if (len_out != NULL)
*len_out = info->len;
return info->data;
}
#endif
/* Try to find the config from the board-specific structures
* in the kernel. */
for (i = 0; i < omap_board_config_size; i++) {
if (omap_board_config[i].tag == tag) {
kinfo = &omap_board_config[i];
break;
}
}
if (kinfo == NULL)
return NULL;
return kinfo->data;
}
const void *__omap_get_config(u16 tag, size_t len, int nr)
{
return get_config(tag, len, nr, NULL);
}
EXPORT_SYMBOL(__omap_get_config);
const void *omap_get_var_config(u16 tag, size_t *len)
{
return get_config(tag, NO_LENGTH_CHECK, 0, len);
}
EXPORT_SYMBOL(omap_get_var_config);
static int __init omap_add_serial_console(void)
{
const struct omap_serial_console_config *con_info;
const struct omap_uart_config *uart_info;
static char speed[11], *opt = NULL;
int line, i, uart_idx;
uart_info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
con_info = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
struct omap_serial_console_config);
if (uart_info == NULL || con_info == NULL)
return 0;
if (con_info->console_uart == 0)
return 0;
if (con_info->console_speed) {
snprintf(speed, sizeof(speed), "%u", con_info->console_speed);
opt = speed;
}
uart_idx = con_info->console_uart - 1;
if (uart_idx >= OMAP_MAX_NR_PORTS) {
printk(KERN_INFO "Console: external UART#%d. "
"Not adding it as console this time.\n",
uart_idx + 1);
return 0;
}
if (!(uart_info->enabled_uarts & (1 << uart_idx))) {
printk(KERN_ERR "Console: Selected UART#%d is "
"not enabled for this platform\n",
uart_idx + 1);
return -1;
}
line = 0;
for (i = 0; i < uart_idx; i++) {
if (uart_info->enabled_uarts & (1 << i))
line++;
}
return add_preferred_console("ttyS", line, opt);
}
console_initcall(omap_add_serial_console);
|
