summaryrefslogtreecommitdiff
path: root/ftl_format.c
diff options
context:
space:
mode:
authorDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
committerDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
commit72212c137c574b564723327af751c4054c7cfca6 (patch)
tree13be2da9d4be695002d6ea9c396660c986e5fa5c /ftl_format.c
Initial commit
Diffstat (limited to 'ftl_format.c')
-rw-r--r--ftl_format.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/ftl_format.c b/ftl_format.c
new file mode 100644
index 0000000..231fb3f
--- /dev/null
+++ b/ftl_format.c
@@ -0,0 +1,343 @@
+/* Ported to MTD system.
+ * $Id: ftl_format.c,v 1.9 2005/11/07 11:15:12 gleixner Exp $
+ * Based on:
+ */
+/*======================================================================
+
+ Utility to create an FTL partition in a memory region
+
+ ftl_format.c 1.13 1999/10/25 20:01:35
+
+ The contents of this file are subject to the Mozilla Public
+ License Version 1.1 (the "License"); you may not use this file
+ except in compliance with the License. You may obtain a copy of
+ the License at http://www.mozilla.org/MPL/
+
+ Software distributed under the License is distributed on an "AS
+ IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ implied. See the License for the specific language governing
+ rights and limitations under the License.
+
+ The initial developer of the original code is David A. Hinds
+ <dhinds@pcmcia.sourceforge.org>. Portions created by David A. Hinds
+ are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
+
+ Alternatively, the contents of this file may be used under the
+ terms of the GNU Public License version 2 (the "GPL"), in which
+ case the provisions of the GPL are applicable instead of the
+ above. If you wish to allow the use of your version of this file
+ only under the terms of the GPL and not to allow others to use
+ your version of this file under the MPL, indicate your decision
+ by deleting the provisions above and replace them with the notice
+ and other provisions required by the GPL. If you do not delete
+ the provisions above, a recipient may use your version of this
+ file under either the MPL or the GPL.
+
+======================================================================*/
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+
+#include <mtd/mtd-user.h>
+#include <linux/mtd/ftl.h>
+
+#include <byteswap.h>
+#include <endian.h>
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+# define TO_LE32(x) (x)
+# define TO_LE16(x) (x)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+# define TO_LE32(x) (bswap_32(x))
+# define TO_LE16(x) (bswap_16(x))
+#else
+# error cannot detect endianess
+#endif
+
+#define FROM_LE32(x) TO_LE32(x)
+#define FROM_LE16(x) TO_LE16(x)
+
+/*====================================================================*/
+
+static void print_size(u_int s)
+{
+ if ((s > 0x100000) && ((s % 0x100000) == 0))
+ printf("%d mb", s / 0x100000);
+ else if ((s > 0x400) && ((s % 0x400) == 0))
+ printf("%d kb", s / 0x400);
+ else
+ printf("%d bytes", s);
+}
+
+/*====================================================================*/
+
+static const char LinkTarget[] = {
+ 0x13, 0x03, 'C', 'I', 'S'
+};
+static const char DataOrg[] = {
+ 0x46, 0x39, 0x00, 'F', 'T', 'L', '1', '0', '0', 0x00
+};
+
+static void build_header(erase_unit_header_t *hdr, u_int RegionSize,
+ u_int BlockSize, u_int Spare, int Reserve,
+ u_int BootSize)
+{
+ u_int i, BootUnits, nbam, __FormattedSize;
+
+ /* Default everything to the erased state */
+ memset(hdr, 0xff, sizeof(*hdr));
+ memcpy(hdr->LinkTargetTuple, LinkTarget, 5);
+ memcpy(hdr->DataOrgTuple, DataOrg, 10);
+ hdr->EndTuple[0] = hdr->EndTuple[1] = 0xff;
+ BootSize = (BootSize + (BlockSize-1)) & ~(BlockSize-1);
+ BootUnits = BootSize / BlockSize;
+
+ /* We only support 512-byte blocks */
+ hdr->BlockSize = 9;
+ hdr->EraseUnitSize = 0;
+ for (i = BlockSize; i > 1; i >>= 1)
+ hdr->EraseUnitSize++;
+ hdr->EraseCount = TO_LE32(0);
+ hdr->FirstPhysicalEUN = TO_LE16(BootUnits);
+ hdr->NumEraseUnits = TO_LE16((RegionSize - BootSize) >> hdr->EraseUnitSize);
+ hdr->NumTransferUnits = Spare;
+ __FormattedSize = RegionSize - ((Spare + BootUnits) << hdr->EraseUnitSize);
+ /* Leave a little bit of space between the CIS and BAM */
+ hdr->BAMOffset = TO_LE32(0x80);
+ /* Adjust size to account for BAM space */
+ nbam = ((1 << (hdr->EraseUnitSize - hdr->BlockSize)) * sizeof(u_int)
+ + FROM_LE32(hdr->BAMOffset) + (1 << hdr->BlockSize) - 1) >> hdr->BlockSize;
+
+ __FormattedSize -=
+ (FROM_LE16(hdr->NumEraseUnits) - Spare) * (nbam << hdr->BlockSize);
+ __FormattedSize -= ((__FormattedSize * Reserve / 100) & ~0xfff);
+
+ hdr->FormattedSize = TO_LE32(__FormattedSize);
+
+ /* hdr->FirstVMAddress defaults to erased state */
+ hdr->NumVMPages = TO_LE16(0);
+ hdr->Flags = 0;
+ /* hdr->Code defaults to erased state */
+ hdr->SerialNumber = TO_LE32(time(NULL));
+ /* hdr->AltEUHOffset defaults to erased state */
+
+} /* build_header */
+
+/*====================================================================*/
+
+static int format_partition(int fd, int quiet, int interrogate,
+ u_int spare, int reserve, u_int bootsize)
+{
+ mtd_info_t mtd;
+ erase_info_t erase;
+ erase_unit_header_t hdr;
+ u_int step, lun, i, nbam, *bam;
+
+ /* Get partition size, block size */
+ if (ioctl(fd, MEMGETINFO, &mtd) != 0) {
+ perror("get info failed");
+ return -1;
+ }
+
+#if 0
+ /* Intel Series 100 Flash: skip first block */
+ if ((region.JedecMfr == 0x89) && (region.JedecInfo == 0xaa) &&
+ (bootsize == 0)) {
+ if (!quiet)
+ printf("Skipping first block to protect CIS info...\n");
+ bootsize = 1;
+ }
+#endif
+
+ /* Create header */
+ build_header(&hdr, mtd.size, mtd.erasesize,
+ spare, reserve, bootsize);
+
+ if (!quiet) {
+ printf("Partition size = ");
+ print_size(mtd.size);
+ printf(", erase unit size = ");
+ print_size(mtd.erasesize);
+ printf(", %d transfer units\n", spare);
+ if (bootsize != 0) {
+ print_size(FROM_LE16(hdr.FirstPhysicalEUN) << hdr.EraseUnitSize);
+ printf(" allocated for boot image\n");
+ }
+ printf("Reserved %d%%, formatted size = ", reserve);
+ print_size(FROM_LE32(hdr.FormattedSize));
+ printf("\n");
+ fflush(stdout);
+ }
+
+ if (interrogate) {
+ char str[3];
+ printf("This will destroy all data on the target device. "
+ "Confirm (y/n): ");
+ if (fgets(str, 3, stdin) == NULL)
+ return -1;
+ if ((strcmp(str, "y\n") != 0) && (strcmp(str, "Y\n") != 0))
+ return -1;
+ }
+
+ /* Create basic block allocation table for control blocks */
+ nbam = ((mtd.erasesize >> hdr.BlockSize) * sizeof(u_int)
+ + FROM_LE32(hdr.BAMOffset) + (1 << hdr.BlockSize) - 1) >> hdr.BlockSize;
+ bam = malloc(nbam * sizeof(u_int));
+ for (i = 0; i < nbam; i++)
+ bam[i] = TO_LE32(BLOCK_CONTROL);
+
+ /* Erase partition */
+ if (!quiet) {
+ printf("Erasing all blocks...\n");
+ fflush(stdout);
+ }
+ erase.length = mtd.erasesize;
+ erase.start = mtd.erasesize * FROM_LE16(hdr.FirstPhysicalEUN);
+ for (i = 0; i < FROM_LE16(hdr.NumEraseUnits); i++) {
+ if (ioctl(fd, MEMERASE, &erase) < 0) {
+ if (!quiet) {
+ putchar('\n');
+ fflush(stdout);
+ }
+ perror("block erase failed");
+ return -1;
+ }
+ erase.start += erase.length;
+ if (!quiet) {
+ if (mtd.size <= 0x800000) {
+ if (erase.start % 0x100000) {
+ if (!(erase.start % 0x20000)) putchar('-');
+ }
+ else putchar('+');
+ }
+ else {
+ if (erase.start % 0x800000) {
+ if (!(erase.start % 0x100000)) putchar('+');
+ }
+ else putchar('*');
+ }
+ fflush(stdout);
+ }
+ }
+ if (!quiet) putchar('\n');
+
+ /* Prepare erase units */
+ if (!quiet) {
+ printf("Writing erase unit headers...\n");
+ fflush(stdout);
+ }
+ lun = 0;
+ /* Distribute transfer units over the entire region */
+ step = (spare) ? (FROM_LE16(hdr.NumEraseUnits)/spare) : (FROM_LE16(hdr.NumEraseUnits)+1);
+ for (i = 0; i < FROM_LE16(hdr.NumEraseUnits); i++) {
+ u_int ofs = (i + FROM_LE16(hdr.FirstPhysicalEUN)) << hdr.EraseUnitSize;
+ if (lseek(fd, ofs, SEEK_SET) == -1) {
+ perror("seek failed");
+ break;
+ }
+ /* Is this a transfer unit? */
+ if (((i+1) % step) == 0)
+ hdr.LogicalEUN = TO_LE16(0xffff);
+ else {
+ hdr.LogicalEUN = TO_LE16(lun);
+ lun++;
+ }
+ if (write(fd, &hdr, sizeof(hdr)) == -1) {
+ perror("write failed");
+ break;
+ }
+ if (lseek(fd, ofs + FROM_LE32(hdr.BAMOffset), SEEK_SET) == -1) {
+ perror("seek failed");
+ break;
+ }
+ if (write(fd, bam, nbam * sizeof(u_int)) == -1) {
+ perror("write failed");
+ break;
+ }
+ }
+ if (i < FROM_LE16(hdr.NumEraseUnits))
+ return -1;
+ else
+ return 0;
+} /* format_partition */
+
+/*====================================================================*/
+
+int main(int argc, char *argv[])
+{
+ int quiet, interrogate, reserve;
+ int optch, errflg, fd, ret;
+ u_int spare, bootsize;
+ char *s;
+ extern char *optarg;
+ struct stat buf;
+
+ quiet = 0;
+ interrogate = 0;
+ spare = 1;
+ reserve = 5;
+ errflg = 0;
+ bootsize = 0;
+
+ while ((optch = getopt(argc, argv, "qir:s:b:")) != -1) {
+ switch (optch) {
+ case 'q':
+ quiet = 1; break;
+ case 'i':
+ interrogate = 1; break;
+ case 's':
+ spare = strtoul(optarg, NULL, 0); break;
+ case 'r':
+ reserve = strtoul(optarg, NULL, 0); break;
+ case 'b':
+ bootsize = strtoul(optarg, &s, 0);
+ if ((*s == 'k') || (*s == 'K'))
+ bootsize *= 1024;
+ break;
+ default:
+ errflg = 1; break;
+ }
+ }
+ if (errflg || (optind != argc-1)) {
+ fprintf(stderr, "usage: %s [-q] [-i] [-s spare-blocks]"
+ " [-r reserve-percent] [-b bootsize] device\n", argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ if (stat(argv[optind], &buf) != 0) {
+ perror("status check failed");
+ exit(EXIT_FAILURE);
+ }
+ if (!(buf.st_mode & S_IFCHR)) {
+ fprintf(stderr, "%s is not a character special device\n",
+ argv[optind]);
+ exit(EXIT_FAILURE);
+ }
+ fd = open(argv[optind], O_RDWR);
+ if (fd == -1) {
+ perror("open failed");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = format_partition(fd, quiet, interrogate, spare, reserve,
+ bootsize);
+ if (!quiet) {
+ if (ret)
+ printf("format failed.\n");
+ else
+ printf("format successful.\n");
+ }
+ close(fd);
+
+ exit((ret) ? EXIT_FAILURE : EXIT_SUCCESS);
+ return 0;
+}