blob: fe37c39135a0debda0037c6d104b56a4b14817b7 [file] [log] [blame]
Stefan Seyfriedd095fd42009-11-21 18:32:19 +01001/* vi: set sw=4 ts=4: */
2/*
3 * busybox reimplementation of flashcp
4 *
5 * (C) 2009 Stefan Seyfried <seife@sphairon.com>
6 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02007 * Licensed under GPLv2, see file LICENSE in this source tree.
Stefan Seyfriedd095fd42009-11-21 18:32:19 +01008 */
9
10#include "libbb.h"
11#include <mtd/mtd-user.h>
12
13#define MTD_DEBUG 0
14
15#define OPT_v (1 << 0)
16
17#define BUFSIZE (8 * 1024)
18
19static void progress(int mode, uoff_t count, uoff_t total)
20{
21 uoff_t percent;
22
23 if (!option_mask32) //if (!(option_mask32 & OPT_v))
24 return;
25 percent = count * 100;
26 if (total)
27 percent = (unsigned) (percent / total);
28 printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ",
29 (mode == 0) ? "Erasing block" : ((mode == 1) ? "Writing kb" : "Verifying kb"),
30 count, total, (unsigned)percent);
31 fflush_all();
32}
33
34static void progress_newline(void)
35{
36 if (!option_mask32) //if (!(option_mask32 & OPT_v))
37 return;
38 bb_putchar('\n');
39}
40
41int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
42int flashcp_main(int argc UNUSED_PARAM, char **argv)
43{
44 int fd_f, fd_d; /* input file and mtd device file descriptors */
45 int i;
46 uoff_t erase_count;
47 unsigned opts;
48 struct mtd_info_user mtd;
49 struct erase_info_user e;
50 struct stat statb;
51// const char *filename, *devicename;
52 RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
53 RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);
54
55 opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
56 opts = getopt32(argv, "v");
57 argv += optind;
58// filename = *argv++;
59// devicename = *argv;
60#define filename argv[0]
61#define devicename argv[1]
62
63 /* open input file and mtd device and do sanity checks */
64 fd_f = xopen(filename, O_RDONLY);
65 fstat(fd_f, &statb);
66 fd_d = xopen(devicename, O_SYNC | O_RDWR);
67#if !MTD_DEBUG
68 if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) {
69 bb_error_msg_and_die("%s is not a MTD flash device", devicename);
70 }
71 if (statb.st_size > mtd.size) {
72 bb_error_msg_and_die("%s bigger than %s", filename, devicename);
73 }
74#else
75 mtd.erasesize = 64 * 1024;
76#endif
77
78 /* always erase a complete block */
79 erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize;
80 /* erase 1 block at a time to be able to give verbose output */
81 e.length = mtd.erasesize;
82#if 0
83/* (1) bloat
84 * (2) will it work for multi-gigabyte devices?
85 * (3) worse wrt error detection granularity
86 */
87 /* optimization: if not verbose, erase in one go */
88 if (!opts) { // if (!(opts & OPT_v))
89 e.length = mtd.erasesize * erase_count;
90 erase_count = 1;
91 }
92#endif
93 e.start = 0;
94 for (i = 1; i <= erase_count; i++) {
95 progress(0, i, erase_count);
96 errno = 0;
97#if !MTD_DEBUG
98 if (ioctl(fd_d, MEMERASE, &e) < 0) {
99 bb_perror_msg_and_die("erase error at 0x%llx on %s",
100 (long long)e.start, devicename);
101 }
102#else
103 usleep(100*1000);
104#endif
105 e.start += mtd.erasesize;
106 }
107 progress_newline();
108
109 /* doing this outer loop gives significantly smaller code
110 * than doing two separate loops for writing and verifying */
111 for (i = 1; i <= 2; i++) {
112 uoff_t done;
113 unsigned count;
114
115 xlseek(fd_f, 0, SEEK_SET);
116 xlseek(fd_d, 0, SEEK_SET);
117 done = 0;
118 count = BUFSIZE;
119 while (1) {
120 uoff_t rem = statb.st_size - done;
121 if (rem == 0)
122 break;
123 if (rem < BUFSIZE)
124 count = rem;
125 progress(i, done / 1024, (uoff_t)statb.st_size / 1024);
126 xread(fd_f, buf, count);
127 if (i == 1) {
128 int ret;
129 errno = 0;
130 ret = full_write(fd_d, buf, count);
131 if (ret != count) {
132 bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
133 "write returned %d",
134 done, devicename, ret);
135 }
136 } else { /* i == 2 */
137 xread(fd_d, buf2, count);
138 if (memcmp(buf, buf2, count)) {
139 bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done);
140 }
141 }
142
143 done += count;
144 }
145
146 progress_newline();
147 }
148 /* we won't come here if there was an error */
149
150 return EXIT_SUCCESS;
151}