[U-Boot] [PATCH v2 5/6] cmd: mtd: Use the subcmd infrastructure to declare mtd sub-commands
Boris Brezillon
boris.brezillon at bootlin.com
Wed Nov 28 23:39:20 UTC 2018
It's way simpler this way, and we also gain auto-completion support for
free (MTD name auto-completion has been added with do_mtd_name_complete())
Signed-off-by: Boris Brezillon <boris.brezillon at bootlin.com>
---
Changes in v2:
- Drop maxargs arg
---
cmd/mtd.c | 476 ++++++++++++++++++++++++++++++++----------------------
1 file changed, 281 insertions(+), 195 deletions(-)
diff --git a/cmd/mtd.c b/cmd/mtd.c
index 614222398467..5b415aaa1d86 100644
--- a/cmd/mtd.c
+++ b/cmd/mtd.c
@@ -15,6 +15,22 @@
#include <mapmem.h>
#include <mtd.h>
+#include <linux/ctype.h>
+
+static struct mtd_info *get_mtd_by_name(const char *name)
+{
+ struct mtd_info *mtd;
+
+ mtd_probe_devices();
+
+ mtd = get_mtd_device_nm(name);
+ if (IS_ERR_OR_NULL(mtd))
+ printf("MTD device %s not found, ret %ld\n", name,
+ PTR_ERR(mtd));
+
+ return mtd;
+}
+
static uint mtd_len_to_pages(struct mtd_info *mtd, u64 len)
{
do_div(len, mtd->writesize);
@@ -177,7 +193,8 @@ static bool mtd_oob_write_is_empty(struct mtd_oob_ops *op)
return true;
}
-static int do_mtd_list(void)
+static int do_mtd_list(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
{
struct mtd_info *mtd;
int dev_nb = 0;
@@ -221,229 +238,287 @@ static int mtd_special_write_oob(struct mtd_info *mtd, u64 off,
return ret;
}
-static int do_mtd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+static int do_mtd_io(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
+ bool dump, read, raw, woob, write_empty_pages, has_pages = false;
+ u64 start_off, off, len, remaining, default_len;
+ struct mtd_oob_ops io_op = {};
+ uint user_addr = 0, npages;
+ const char *cmd = argv[0];
struct mtd_info *mtd;
- const char *cmd;
- char *mtd_name;
+ u32 oob_len;
+ u8 *buf;
+ int ret;
- /* All MTD commands need at least two arguments */
if (argc < 2)
return CMD_RET_USAGE;
- /* Parse the command name and its optional suffixes */
- cmd = argv[1];
-
- /* List the MTD devices if that is what the user wants */
- if (strcmp(cmd, "list") == 0)
- return do_mtd_list();
-
- /*
- * The remaining commands require also at least a device ID.
- * Check the selected device is valid. Ensure it is probed.
- */
- if (argc < 3)
- return CMD_RET_USAGE;
-
- mtd_name = argv[2];
- mtd_probe_devices();
- mtd = get_mtd_device_nm(mtd_name);
- if (IS_ERR_OR_NULL(mtd)) {
- printf("MTD device %s not found, ret %ld\n",
- mtd_name, PTR_ERR(mtd));
+ mtd = get_mtd_by_name(argv[1]);
+ if (IS_ERR_OR_NULL(mtd))
return CMD_RET_FAILURE;
+
+ if (mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH)
+ has_pages = true;
+
+ dump = !strncmp(cmd, "dump", 4);
+ read = dump || !strncmp(cmd, "read", 4);
+ raw = strstr(cmd, ".raw");
+ woob = strstr(cmd, ".oob");
+ write_empty_pages = !has_pages || strstr(cmd, ".dontskipff");
+
+ argc -= 2;
+ argv += 2;
+
+ if (!dump) {
+ if (!argc) {
+ ret = CMD_RET_USAGE;
+ goto out_put_mtd;
+ }
+
+ user_addr = simple_strtoul(argv[0], NULL, 16);
+ argc--;
+ argv++;
}
- put_mtd_device(mtd);
- argc -= 3;
- argv += 3;
+ start_off = argc > 0 ? simple_strtoul(argv[0], NULL, 16) : 0;
+ if (!mtd_is_aligned_with_min_io_size(mtd, start_off)) {
+ printf("Offset not aligned with a page (0x%x)\n",
+ mtd->writesize);
+ ret = CMD_RET_FAILURE;
+ goto out_put_mtd;
+ }
- /* Do the parsing */
- if (!strncmp(cmd, "read", 4) || !strncmp(cmd, "dump", 4) ||
- !strncmp(cmd, "write", 5)) {
- bool has_pages = mtd->type == MTD_NANDFLASH ||
- mtd->type == MTD_MLCNANDFLASH;
- bool dump, read, raw, woob, write_empty_pages;
- struct mtd_oob_ops io_op = {};
- uint user_addr = 0, npages;
- u64 start_off, off, len, remaining, default_len;
- u32 oob_len;
- u8 *buf;
- int ret;
+ default_len = dump ? mtd->writesize : mtd->size;
+ len = argc > 1 ? simple_strtoul(argv[1], NULL, 16) : default_len;
+ if (!mtd_is_aligned_with_min_io_size(mtd, len)) {
+ len = round_up(len, mtd->writesize);
+ printf("Size not on a page boundary (0x%x), rounding to 0x%llx\n",
+ mtd->writesize, len);
+ }
- dump = !strncmp(cmd, "dump", 4);
- read = dump || !strncmp(cmd, "read", 4);
- raw = strstr(cmd, ".raw");
- woob = strstr(cmd, ".oob");
- write_empty_pages = !has_pages || strstr(cmd, ".dontskipff");
+ remaining = len;
+ npages = mtd_len_to_pages(mtd, len);
+ oob_len = woob ? npages * mtd->oobsize : 0;
- if (!dump) {
- if (!argc)
- return CMD_RET_USAGE;
+ if (dump)
+ buf = kmalloc(len + oob_len, GFP_KERNEL);
+ else
+ buf = map_sysmem(user_addr, 0);
- user_addr = simple_strtoul(argv[0], NULL, 16);
- argc--;
- argv++;
- }
+ if (!buf) {
+ printf("Could not map/allocate the user buffer\n");
+ ret = CMD_RET_FAILURE;
+ goto out_put_mtd;
+ }
- start_off = argc > 0 ? simple_strtoul(argv[0], NULL, 16) : 0;
- if (!mtd_is_aligned_with_min_io_size(mtd, start_off)) {
- printf("Offset not aligned with a page (0x%x)\n",
- mtd->writesize);
- return CMD_RET_FAILURE;
- }
+ if (has_pages)
+ printf("%s %lld byte(s) (%d page(s)) at offset 0x%08llx%s%s%s\n",
+ read ? "Reading" : "Writing", len, npages, start_off,
+ raw ? " [raw]" : "", woob ? " [oob]" : "",
+ !read && write_empty_pages ? " [dontskipff]" : "");
+ else
+ printf("%s %lld byte(s) at offset 0x%08llx\n",
+ read ? "Reading" : "Writing", len, start_off);
- default_len = dump ? mtd->writesize : mtd->size;
- len = argc > 1 ? simple_strtoul(argv[1], NULL, 16) :
- default_len;
- if (!mtd_is_aligned_with_min_io_size(mtd, len)) {
- len = round_up(len, mtd->writesize);
- printf("Size not on a page boundary (0x%x), rounding to 0x%llx\n",
- mtd->writesize, len);
- }
+ io_op.mode = raw ? MTD_OPS_RAW : MTD_OPS_AUTO_OOB;
+ io_op.len = has_pages ? mtd->writesize : len;
+ io_op.ooblen = woob ? mtd->oobsize : 0;
+ io_op.datbuf = buf;
+ io_op.oobbuf = woob ? &buf[len] : NULL;
- remaining = len;
- npages = mtd_len_to_pages(mtd, len);
- oob_len = woob ? npages * mtd->oobsize : 0;
+ /* Search for the first good block after the given offset */
+ off = start_off;
+ while (mtd_block_isbad(mtd, off))
+ off += mtd->erasesize;
- if (dump)
- buf = kmalloc(len + oob_len, GFP_KERNEL);
- else
- buf = map_sysmem(user_addr, 0);
-
- if (!buf) {
- printf("Could not map/allocate the user buffer\n");
- return CMD_RET_FAILURE;
- }
-
- if (has_pages)
- printf("%s %lld byte(s) (%d page(s)) at offset 0x%08llx%s%s%s\n",
- read ? "Reading" : "Writing", len, npages, start_off,
- raw ? " [raw]" : "", woob ? " [oob]" : "",
- !read && write_empty_pages ? " [dontskipff]" : "");
- else
- printf("%s %lld byte(s) at offset 0x%08llx\n",
- read ? "Reading" : "Writing", len, start_off);
-
- io_op.mode = raw ? MTD_OPS_RAW : MTD_OPS_AUTO_OOB;
- io_op.len = has_pages ? mtd->writesize : len;
- io_op.ooblen = woob ? mtd->oobsize : 0;
- io_op.datbuf = buf;
- io_op.oobbuf = woob ? &buf[len] : NULL;
-
- /* Search for the first good block after the given offset */
- off = start_off;
- while (mtd_block_isbad(mtd, off))
+ /* Loop over the pages to do the actual read/write */
+ while (remaining) {
+ /* Skip the block if it is bad */
+ if (mtd_is_aligned_with_block_size(mtd, off) &&
+ mtd_block_isbad(mtd, off)) {
off += mtd->erasesize;
-
- /* Loop over the pages to do the actual read/write */
- while (remaining) {
- /* Skip the block if it is bad */
- if (mtd_is_aligned_with_block_size(mtd, off) &&
- mtd_block_isbad(mtd, off)) {
- off += mtd->erasesize;
- continue;
- }
-
- if (read)
- ret = mtd_read_oob(mtd, off, &io_op);
- else
- ret = mtd_special_write_oob(mtd, off, &io_op,
- write_empty_pages,
- woob);
-
- if (ret) {
- printf("Failure while %s at offset 0x%llx\n",
- read ? "reading" : "writing", off);
- return CMD_RET_FAILURE;
- }
-
- off += io_op.retlen;
- remaining -= io_op.retlen;
- io_op.datbuf += io_op.retlen;
- io_op.oobbuf += io_op.oobretlen;
+ continue;
}
- if (!ret && dump)
- mtd_dump_device_buf(mtd, start_off, buf, len, woob);
-
- if (dump)
- kfree(buf);
+ if (read)
+ ret = mtd_read_oob(mtd, off, &io_op);
else
- unmap_sysmem(buf);
+ ret = mtd_special_write_oob(mtd, off, &io_op,
+ write_empty_pages, woob);
if (ret) {
- printf("%s on %s failed with error %d\n",
- read ? "Read" : "Write", mtd->name, ret);
- return CMD_RET_FAILURE;
+ printf("Failure while %s at offset 0x%llx\n",
+ read ? "reading" : "writing", off);
+ break;
}
- } else if (!strcmp(cmd, "erase")) {
- bool scrub = strstr(cmd, ".dontskipbad");
- struct erase_info erase_op = {};
- u64 off, len;
- int ret;
-
- off = argc > 0 ? simple_strtoul(argv[0], NULL, 16) : 0;
- len = argc > 1 ? simple_strtoul(argv[1], NULL, 16) : mtd->size;
-
- if (!mtd_is_aligned_with_block_size(mtd, off)) {
- printf("Offset not aligned with a block (0x%x)\n",
- mtd->erasesize);
- return CMD_RET_FAILURE;
- }
-
- if (!mtd_is_aligned_with_block_size(mtd, len)) {
- printf("Size not a multiple of a block (0x%x)\n",
- mtd->erasesize);
- return CMD_RET_FAILURE;
- }
-
- printf("Erasing 0x%08llx ... 0x%08llx (%d eraseblock(s))\n",
- off, off + len - 1, mtd_div_by_eb(len, mtd));
-
- erase_op.mtd = mtd;
- erase_op.addr = off;
- erase_op.len = len;
- erase_op.scrub = scrub;
-
- while (erase_op.len) {
- ret = mtd_erase(mtd, &erase_op);
-
- /* Abort if its not a bad block error */
- if (ret != -EIO)
- break;
-
- printf("Skipping bad block at 0x%08llx\n",
- erase_op.fail_addr);
-
- /* Skip bad block and continue behind it */
- erase_op.len -= erase_op.fail_addr - erase_op.addr;
- erase_op.len -= mtd->erasesize;
- erase_op.addr = erase_op.fail_addr + mtd->erasesize;
- }
-
- if (ret && ret != -EIO)
- return CMD_RET_FAILURE;
- } else if (!strcmp(cmd, "bad")) {
- loff_t off;
-
- if (!mtd_can_have_bb(mtd)) {
- printf("Only NAND-based devices can have bad blocks\n");
- return CMD_RET_SUCCESS;
- }
-
- printf("MTD device %s bad blocks list:\n", mtd->name);
- for (off = 0; off < mtd->size; off += mtd->erasesize)
- if (mtd_block_isbad(mtd, off))
- printf("\t0x%08llx\n", off);
- } else {
- return CMD_RET_USAGE;
+ off += io_op.retlen;
+ remaining -= io_op.retlen;
+ io_op.datbuf += io_op.retlen;
+ io_op.oobbuf += io_op.oobretlen;
}
+ if (!ret && dump)
+ mtd_dump_device_buf(mtd, start_off, buf, len, woob);
+
+ if (dump)
+ kfree(buf);
+ else
+ unmap_sysmem(buf);
+
+ if (ret) {
+ printf("%s on %s failed with error %d\n",
+ read ? "Read" : "Write", mtd->name, ret);
+ ret = CMD_RET_FAILURE;
+ } else {
+ ret = CMD_RET_SUCCESS;
+ }
+
+out_put_mtd:
+ put_mtd_device(mtd);
+
+ return ret;
+}
+
+static int do_mtd_erase(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ struct erase_info erase_op = {};
+ struct mtd_info *mtd;
+ u64 off, len;
+ bool scrub;
+ int ret;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
+ mtd = get_mtd_by_name(argv[1]);
+ if (IS_ERR_OR_NULL(mtd))
+ return CMD_RET_FAILURE;
+
+ scrub = strstr(argv[0], ".dontskipbad");
+
+ argc -= 2;
+ argv += 2;
+
+ off = argc > 0 ? simple_strtoul(argv[0], NULL, 16) : 0;
+ len = argc > 1 ? simple_strtoul(argv[1], NULL, 16) : mtd->size;
+
+ if (!mtd_is_aligned_with_block_size(mtd, off)) {
+ printf("Offset not aligned with a block (0x%x)\n",
+ mtd->erasesize);
+ ret = CMD_RET_FAILURE;
+ goto out_put_mtd;
+ }
+
+ if (!mtd_is_aligned_with_block_size(mtd, len)) {
+ printf("Size not a multiple of a block (0x%x)\n",
+ mtd->erasesize);
+ ret = CMD_RET_FAILURE;
+ goto out_put_mtd;
+ }
+
+ printf("Erasing 0x%08llx ... 0x%08llx (%d eraseblock(s))\n",
+ off, off + len - 1, mtd_div_by_eb(len, mtd));
+
+ erase_op.mtd = mtd;
+ erase_op.addr = off;
+ erase_op.len = len;
+ erase_op.scrub = scrub;
+
+ while (erase_op.len) {
+ ret = mtd_erase(mtd, &erase_op);
+
+ /* Abort if its not a bad block error */
+ if (ret != -EIO)
+ break;
+
+ printf("Skipping bad block at 0x%08llx\n", erase_op.fail_addr);
+
+ /* Skip bad block and continue behind it */
+ erase_op.len -= erase_op.fail_addr - erase_op.addr;
+ erase_op.len -= mtd->erasesize;
+ erase_op.addr = erase_op.fail_addr + mtd->erasesize;
+ }
+
+ if (ret && ret != -EIO)
+ ret = CMD_RET_FAILURE;
+ else
+ ret = CMD_RET_SUCCESS;
+
+out_put_mtd:
+ put_mtd_device(mtd);
+
+ return ret;
+}
+
+static int do_mtd_bad(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ struct mtd_info *mtd;
+ loff_t off;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
+ mtd = get_mtd_by_name(argv[1]);
+ if (IS_ERR_OR_NULL(mtd))
+ return CMD_RET_FAILURE;
+
+ if (!mtd_can_have_bb(mtd)) {
+ printf("Only NAND-based devices can have bad blocks\n");
+ goto out_put_mtd;
+ }
+
+ printf("MTD device %s bad blocks list:\n", mtd->name);
+ for (off = 0; off < mtd->size; off += mtd->erasesize) {
+ if (mtd_block_isbad(mtd, off))
+ printf("\t0x%08llx\n", off);
+ }
+
+out_put_mtd:
+ put_mtd_device(mtd);
+
return CMD_RET_SUCCESS;
}
+#ifdef CONFIG_AUTO_COMPLETE
+static int do_mtd_name_complete(int argc, char * const argv[],
+ char last_char, int maxv, char *cmdv[])
+{
+ int len = 0, n_found = 0;
+ struct mtd_info *mtd;
+
+ argc--;
+ argv++;
+
+ if (argc > 1 ||
+ (argc == 1 && (last_char == '\0' || isblank(last_char))))
+ return 0;
+
+ if (argc)
+ len = strlen(argv[0]);
+
+ mtd_for_each_device(mtd) {
+ if (argc &&
+ (len > strlen(mtd->name) ||
+ strncmp(argv[0], mtd->name, len)))
+ continue;
+
+ if (n_found >= maxv - 2) {
+ cmdv[n_found++] = "...";
+ break;
+ }
+
+ cmdv[n_found++] = mtd->name;
+ }
+
+ cmdv[n_found] = NULL;
+
+ return n_found;
+}
+#endif /* CONFIG_AUTO_COMPLETE */
+
static char mtd_help_text[] =
#ifdef CONFIG_SYS_LONGHELP
"- generic operations on memory technology devices\n\n"
@@ -470,4 +545,15 @@ static char mtd_help_text[] =
#endif
"";
-U_BOOT_CMD(mtd, 10, 1, do_mtd, "MTD utils", mtd_help_text);
+U_BOOT_CMD_WITH_SUBCMDS(mtd, "MTD utils", mtd_help_text,
+ U_BOOT_SUBCMD_MKENT(list, 1, 1, do_mtd_list),
+ U_BOOT_SUBCMD_MKENT_COMPLETE(read, 5, 0, do_mtd_io,
+ do_mtd_name_complete),
+ U_BOOT_SUBCMD_MKENT_COMPLETE(write, 5, 0, do_mtd_io,
+ do_mtd_name_complete),
+ U_BOOT_SUBCMD_MKENT_COMPLETE(dump, 4, 0, do_mtd_io,
+ do_mtd_name_complete),
+ U_BOOT_SUBCMD_MKENT_COMPLETE(erase, 4, 0, do_mtd_erase,
+ do_mtd_name_complete),
+ U_BOOT_SUBCMD_MKENT_COMPLETE(bad, 1, 1, do_mtd_bad,
+ do_mtd_name_complete));
--
2.17.1
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