1 /* vi: set sw=4 ts=4: */
3 * busybox reimplementation of flashcp
5 * (C) 2009 Stefan Seyfried <seife@sphairon.com>
7 * Licensed under GPLv2, see file LICENSE in this source tree.
9 //config:config FLASHCP
10 //config: bool "flashcp"
11 //config: default n # doesn't build on Ubuntu 8.04
13 //config: The flashcp binary, inspired by mtd-utils as of git head 5eceb74f7.
14 //config: This utility is used to copy images into a MTD device.
16 //usage:#define flashcp_trivial_usage
17 //usage: "-v FILE MTD_DEVICE"
18 //usage:#define flashcp_full_usage "\n\n"
19 //usage: "Copy an image to MTD device\n"
20 //usage: "\n -v Verbose"
23 #include <mtd/mtd-user.h>
25 /* If 1, simulates "flashing" by writing to existing regular file */
28 #define OPT_v (1 << 0)
30 #define BUFSIZE (4 * 1024)
32 static void progress(int mode, uoff_t count, uoff_t total)
36 if (!option_mask32) //if (!(option_mask32 & OPT_v))
38 percent = count * 100;
40 percent = (unsigned) (percent / total);
41 printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ",
42 (mode < 0) ? "Erasing block" : ((mode == 0) ? "Writing kb" : "Verifying kb"),
43 count, total, (unsigned)percent);
47 static void progress_newline(void)
49 if (!option_mask32) //if (!(option_mask32 & OPT_v))
54 int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
55 int flashcp_main(int argc UNUSED_PARAM, char **argv)
57 int fd_f, fd_d; /* input file and mtd device file descriptors */
60 struct mtd_info_user mtd;
61 struct erase_info_user e;
63 // const char *filename, *devicename;
64 RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
65 RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);
67 opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
68 /*opts =*/ getopt32(argv, "v");
70 // filename = *argv++;
71 // devicename = *argv;
72 #define filename argv[0]
73 #define devicename argv[1]
75 /* open input file and mtd device and do sanity checks */
76 fd_f = xopen(filename, O_RDONLY);
78 fd_d = xopen(devicename, O_SYNC | O_RDWR);
80 if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) {
81 bb_error_msg_and_die("%s is not a MTD flash device", devicename);
83 if (statb.st_size > mtd.size) {
84 bb_error_msg_and_die("%s bigger than %s", filename, devicename);
87 mtd.erasesize = 64 * 1024;
90 /* always erase a complete block */
91 erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize;
92 /* erase 1 block at a time to be able to give verbose output */
93 e.length = mtd.erasesize;
96 * (2) will it work for multi-gigabyte devices?
97 * (3) worse wrt error detection granularity
99 /* optimization: if not verbose, erase in one go */
100 if (!opts) { // if (!(opts & OPT_v))
101 e.length = mtd.erasesize * erase_count;
106 for (i = 1; i <= erase_count; i++) {
107 progress(-1, i, erase_count);
109 if (ioctl(fd_d, MEMERASE, &e) < 0) {
110 bb_perror_msg_and_die("erase error at 0x%llx on %s",
111 (long long)e.start, devicename);
116 e.start += mtd.erasesize;
120 /* doing this outer loop gives significantly smaller code
121 * than doing two separate loops for writing and verifying */
122 for (i = 0; i <= 1; i++) {
126 xlseek(fd_f, 0, SEEK_SET);
127 xlseek(fd_d, 0, SEEK_SET);
133 progress(i, done / 1024, (uoff_t)statb.st_size / 1024);
134 rem = statb.st_size - done;
139 xread(fd_f, buf, count);
143 memset((char*)buf + count, 0, BUFSIZE - count);
145 ret = full_write(fd_d, buf, BUFSIZE);
146 if (ret != BUFSIZE) {
147 bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
149 done, devicename, ret);
151 } else { /* i == 1 */
152 xread(fd_d, buf2, count);
153 if (memcmp(buf, buf2, count) != 0) {
154 bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done);
163 /* we won't come here if there was an error */