[2725] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * busybox reimplementation of flashcp
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| 4 | *
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| 5 | * (C) 2009 Stefan Seyfried <seife@sphairon.com>
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| 6 | *
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| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 | #include <mtd/mtd-user.h>
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| 12 |
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| 13 | #define MTD_DEBUG 0
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| 14 |
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| 15 | #define OPT_v (1 << 0)
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| 16 |
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| 17 | #define BUFSIZE (8 * 1024)
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| 18 |
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| 19 | static void progress(int mode, uoff_t count, uoff_t total)
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| 20 | {
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| 21 | uoff_t percent;
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| 22 |
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| 23 | if (!option_mask32) //if (!(option_mask32 & OPT_v))
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| 24 | return;
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| 25 | percent = count * 100;
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| 26 | if (total)
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| 27 | percent = (unsigned) (percent / total);
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| 28 | printf("\r%s: %"OFF_FMT"u/%"OFF_FMT"u (%u%%) ",
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| 29 | (mode == 0) ? "Erasing block" : ((mode == 1) ? "Writing kb" : "Verifying kb"),
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| 30 | count, total, (unsigned)percent);
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| 31 | fflush_all();
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| 32 | }
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| 33 |
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| 34 | static void progress_newline(void)
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| 35 | {
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| 36 | if (!option_mask32) //if (!(option_mask32 & OPT_v))
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| 37 | return;
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| 38 | bb_putchar('\n');
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| 39 | }
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| 40 |
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| 41 | int flashcp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 42 | int flashcp_main(int argc UNUSED_PARAM, char **argv)
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| 43 | {
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| 44 | int fd_f, fd_d; /* input file and mtd device file descriptors */
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| 45 | int i;
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| 46 | uoff_t erase_count;
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| 47 | unsigned opts;
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| 48 | struct mtd_info_user mtd;
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| 49 | struct erase_info_user e;
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| 50 | struct stat statb;
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| 51 | // const char *filename, *devicename;
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| 52 | RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
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| 53 | RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);
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| 54 |
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| 55 | opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
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| 56 | opts = getopt32(argv, "v");
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| 57 | argv += optind;
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| 58 | // filename = *argv++;
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| 59 | // devicename = *argv;
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| 60 | #define filename argv[0]
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| 61 | #define devicename argv[1]
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| 62 |
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| 63 | /* open input file and mtd device and do sanity checks */
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| 64 | fd_f = xopen(filename, O_RDONLY);
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| 65 | fstat(fd_f, &statb);
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| 66 | fd_d = xopen(devicename, O_SYNC | O_RDWR);
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| 67 | #if !MTD_DEBUG
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| 68 | if (ioctl(fd_d, MEMGETINFO, &mtd) < 0) {
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| 69 | bb_error_msg_and_die("%s is not a MTD flash device", devicename);
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| 70 | }
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| 71 | if (statb.st_size > mtd.size) {
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| 72 | bb_error_msg_and_die("%s bigger than %s", filename, devicename);
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| 73 | }
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| 74 | #else
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| 75 | mtd.erasesize = 64 * 1024;
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| 76 | #endif
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| 77 |
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| 78 | /* always erase a complete block */
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| 79 | erase_count = (uoff_t)(statb.st_size + mtd.erasesize - 1) / mtd.erasesize;
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| 80 | /* erase 1 block at a time to be able to give verbose output */
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| 81 | e.length = mtd.erasesize;
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| 82 | #if 0
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| 83 | /* (1) bloat
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| 84 | * (2) will it work for multi-gigabyte devices?
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| 85 | * (3) worse wrt error detection granularity
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| 86 | */
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| 87 | /* optimization: if not verbose, erase in one go */
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| 88 | if (!opts) { // if (!(opts & OPT_v))
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| 89 | e.length = mtd.erasesize * erase_count;
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| 90 | erase_count = 1;
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| 91 | }
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| 92 | #endif
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| 93 | e.start = 0;
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| 94 | for (i = 1; i <= erase_count; i++) {
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| 95 | progress(0, i, erase_count);
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| 96 | errno = 0;
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| 97 | #if !MTD_DEBUG
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| 98 | if (ioctl(fd_d, MEMERASE, &e) < 0) {
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| 99 | bb_perror_msg_and_die("erase error at 0x%llx on %s",
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| 100 | (long long)e.start, devicename);
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| 101 | }
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| 102 | #else
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| 103 | usleep(100*1000);
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| 104 | #endif
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| 105 | e.start += mtd.erasesize;
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| 106 | }
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| 107 | progress_newline();
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| 108 |
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| 109 | /* doing this outer loop gives significantly smaller code
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| 110 | * than doing two separate loops for writing and verifying */
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| 111 | for (i = 1; i <= 2; i++) {
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| 112 | uoff_t done;
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| 113 | unsigned count;
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| 114 |
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| 115 | xlseek(fd_f, 0, SEEK_SET);
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| 116 | xlseek(fd_d, 0, SEEK_SET);
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| 117 | done = 0;
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| 118 | count = BUFSIZE;
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| 119 | while (1) {
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| 120 | uoff_t rem = statb.st_size - done;
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| 121 | if (rem == 0)
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| 122 | break;
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| 123 | if (rem < BUFSIZE)
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| 124 | count = rem;
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| 125 | progress(i, done / 1024, (uoff_t)statb.st_size / 1024);
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| 126 | xread(fd_f, buf, count);
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| 127 | if (i == 1) {
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| 128 | int ret;
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| 129 | errno = 0;
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| 130 | ret = full_write(fd_d, buf, count);
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| 131 | if (ret != count) {
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| 132 | bb_perror_msg_and_die("write error at 0x%"OFF_FMT"x on %s, "
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| 133 | "write returned %d",
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| 134 | done, devicename, ret);
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| 135 | }
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| 136 | } else { /* i == 2 */
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| 137 | xread(fd_d, buf2, count);
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| 138 | if (memcmp(buf, buf2, count)) {
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| 139 | bb_error_msg_and_die("verification mismatch at 0x%"OFF_FMT"x", done);
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | done += count;
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| 144 | }
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| 145 |
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| 146 | progress_newline();
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| 147 | }
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| 148 | /* we won't come here if there was an error */
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| 149 |
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| 150 | return EXIT_SUCCESS;
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| 151 | }
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