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
|
/*
* Copyright (C) ST-Ericsson SA 2010
* Author: Peter Nessrup <peter.nessrup@stericsson.com> for
* ST-Ericsson.
* License terms: GNU General Public License (GPL), version 2.
*/
/*
* Support for setting blkdevparts environment variable, to be passed to
* the Kernel on the kernel command line
*/
#include <common.h>
#include <part.h>
#include <malloc.h>
#if !defined(CONFIG_TOC_PARTITION)
#error TOC partition support must be selected
#endif
#define MMC_BLKDEV_ID "mmcblk"
#define MAX_BLKDEVPARTS_MAXLEN 256
#define MAX_PARTITION_MAXLEN 20
int do_blkdevparts(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
disk_partition_t part_info;
block_dev_desc_t *dev_desc;
char *ep;
int part = 1; /* Start with partition 1 */
char *blkdevparts;
char blkdev_buf[MAX_BLKDEVPARTS_MAXLEN];
char part_buf[MAX_PARTITION_MAXLEN];
int dev;
int m, n;
const char *env_p;
debug("do_blkdevparts\n");
memset(blkdev_buf, 0, sizeof(blkdev_buf));
if (argc < 3) {
cmd_usage(cmdtp);
return 1;
}
dev = (int) simple_strtoul(argv[2], &ep, 16);
dev_desc = get_dev(argv[1], dev);
if (dev_desc == NULL) {
printf("Invalid device\n");
return 1;
}
if (dev_desc->part_type != PART_TYPE_TOC) {
printf("Device is not TOC partitioned!\n");
return 1;
}
/* Only support sd/mmc interface */
switch (dev_desc->if_type) {
case IF_TYPE_MMC:
case IF_TYPE_SD:
n = sprintf(blkdev_buf, "%s", MMC_BLKDEV_ID);
break;
default:
printf("Interface is not supported: %s\n", argv[1]);
return 1;
}
/* Add the device */
n += sprintf(&blkdev_buf[n], "%d:", dev);
while (get_partition_info(dev_desc, part, &part_info) == 0) {
memset(part_buf, 0, sizeof(part_buf));
m = 0;
/*
* Build up the bootargs environment
* variable with blkdev info
*/
debug("Partition found - part: %d!\n", part);
/* Partition found */
if (part > 1)
/* Don't add a comma before the first partition */
m = sprintf(part_buf, "%s", ",");
sprintf(&part_buf[m], "%lu@%lu",
part_info.size, part_info.start);
/* Append the partition to the blkdev string */
if ((n + sizeof(part_buf)) <= sizeof(blkdev_buf))
n += sprintf(&blkdev_buf[n], "%s", part_buf);
else {
printf("No space to add partition to blkdevparts\n");
return 1;
}
part++;
};
debug("No more partitions\n");
/* Check if blkdevparts env var already existing */
env_p = getenv("blkdevparts");
if (env_p) {
debug("Appending to existing blkdevparts env var\n");
/* Allocate a buffer incl the added ;*/
blkdevparts = malloc(strlen(env_p) + strlen(blkdev_buf) + 1);
sprintf(blkdevparts, "%s;%s", env_p, blkdev_buf);
setenv("blkdevparts", blkdevparts);
/* free up the buffer */
free(blkdevparts);
} else
setenv("blkdevparts", blkdev_buf);
return 0;
}
U_BOOT_CMD(
blkdevparts, 3, 0, do_blkdevparts,
"assembles partition info for kernel cmd line",
"<interface> <dev>\n"
" - assembles the blkdevparts env var with partition information\n"
" for kernel cmd line, read from the <dev> TOC on <interface>"
);
|
