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cmd: mtd: OTP access support
Add access to OTP region. It supports info, dump, write and lock operations. Usage example: 'mtd otpread nand0 u 0 1024' - dump 1024 bytes of user area starting from offset 0 of device 'nand0'. 'mtd otpwrite nand0 10 11223344' - write binary data 0x11, 0x22, 0x33, 0x44 to offset 10 to user area of device 'nand0'. 'mtd otplock nand0 0 1024' - lock 1024 bytes of user area starting from offset 0 of device 'nand0'. 'mtd otpinfo nand0 f' - show info about factory area of device 'nand0'. Link: https://lore.kernel.org/all/20240326223919.3781-1-avkrasnov@salutedevices.com Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
This commit is contained in:
Arseniy Krasnov
Dario Binacchi
parent
cd6d71a2e9
commit
248fc16055
2 changed files with 241 additions and 0 deletions
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@ -1361,6 +1361,13 @@ config CMD_MTD
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help
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MTD commands support.
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config CMD_MTD_OTP
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bool "mtd otp"
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depends on CMD_MTD
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select HEXDUMP
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help
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MTD commands for OTP access.
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config CMD_MUX
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bool "mux"
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depends on MULTIPLEXER
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234
cmd/mtd.c
234
cmd/mtd.c
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@ -11,6 +11,9 @@
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#include <command.h>
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#include <common.h>
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#include <console.h>
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#if CONFIG_IS_ENABLED(CMD_MTD_OTP)
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#include <hexdump.h>
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#endif
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#include <malloc.h>
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#include <mapmem.h>
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#include <mtd.h>
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@ -202,6 +205,221 @@ static bool mtd_oob_write_is_empty(struct mtd_oob_ops *op)
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return true;
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}
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#if CONFIG_IS_ENABLED(CMD_MTD_OTP)
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static int do_mtd_otp_read(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct mtd_info *mtd;
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size_t retlen;
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off_t from;
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size_t len;
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bool user;
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int ret;
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u8 *buf;
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if (argc != 5)
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return CMD_RET_USAGE;
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if (!strcmp(argv[2], "u"))
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user = true;
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else if (!strcmp(argv[2], "f"))
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user = false;
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else
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return CMD_RET_USAGE;
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mtd = get_mtd_by_name(argv[1]);
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if (IS_ERR_OR_NULL(mtd))
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return CMD_RET_FAILURE;
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from = simple_strtoul(argv[3], NULL, 0);
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len = simple_strtoul(argv[4], NULL, 0);
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ret = CMD_RET_FAILURE;
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buf = malloc(len);
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if (!buf)
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goto put_mtd;
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printf("Reading %s OTP from 0x%lx, %zu bytes\n",
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user ? "user" : "factory", from, len);
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if (user)
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ret = mtd_read_user_prot_reg(mtd, from, len, &retlen, buf);
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else
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ret = mtd_read_fact_prot_reg(mtd, from, len, &retlen, buf);
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if (ret) {
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free(buf);
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pr_err("OTP read failed: %d\n", ret);
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ret = CMD_RET_FAILURE;
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goto put_mtd;
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}
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if (retlen != len)
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pr_err("OTP read returns %zu, but %zu expected\n",
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retlen, len);
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print_hex_dump("", 0, 16, 1, buf, retlen, true);
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free(buf);
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ret = CMD_RET_SUCCESS;
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put_mtd:
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put_mtd_device(mtd);
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return ret;
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}
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static int do_mtd_otp_lock(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct mtd_info *mtd;
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off_t from;
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size_t len;
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int ret;
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if (argc != 4)
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return CMD_RET_USAGE;
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mtd = get_mtd_by_name(argv[1]);
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if (IS_ERR_OR_NULL(mtd))
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return CMD_RET_FAILURE;
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from = simple_strtoul(argv[2], NULL, 0);
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len = simple_strtoul(argv[3], NULL, 0);
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ret = mtd_lock_user_prot_reg(mtd, from, len);
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if (ret) {
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pr_err("OTP lock failed: %d\n", ret);
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ret = CMD_RET_FAILURE;
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goto put_mtd;
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}
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ret = CMD_RET_SUCCESS;
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put_mtd:
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put_mtd_device(mtd);
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return ret;
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}
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static int do_mtd_otp_write(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct mtd_info *mtd;
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size_t retlen;
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size_t binlen;
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u8 *binbuf;
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off_t from;
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int ret;
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if (argc != 4)
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return CMD_RET_USAGE;
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mtd = get_mtd_by_name(argv[1]);
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if (IS_ERR_OR_NULL(mtd))
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return CMD_RET_FAILURE;
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from = simple_strtoul(argv[2], NULL, 0);
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binlen = strlen(argv[3]) / 2;
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ret = CMD_RET_FAILURE;
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binbuf = malloc(binlen);
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if (!binbuf)
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goto put_mtd;
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hex2bin(binbuf, argv[3], binlen);
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printf("Will write:\n");
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print_hex_dump("", 0, 16, 1, binbuf, binlen, true);
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printf("to 0x%lx\n", from);
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printf("Continue (y/n)?\n");
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if (confirm_yesno() != 1) {
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pr_err("OTP write canceled\n");
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ret = CMD_RET_SUCCESS;
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goto put_mtd;
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}
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ret = mtd_write_user_prot_reg(mtd, from, binlen, &retlen, binbuf);
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if (ret) {
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pr_err("OTP write failed: %d\n", ret);
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ret = CMD_RET_FAILURE;
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goto put_mtd;
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}
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if (retlen != binlen)
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pr_err("OTP write returns %zu, but %zu expected\n",
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retlen, binlen);
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ret = CMD_RET_SUCCESS;
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put_mtd:
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free(binbuf);
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put_mtd_device(mtd);
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return ret;
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}
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static int do_mtd_otp_info(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct otp_info otp_info;
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struct mtd_info *mtd;
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size_t retlen;
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bool user;
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int ret;
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if (argc != 3)
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return CMD_RET_USAGE;
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if (!strcmp(argv[2], "u"))
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user = true;
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else if (!strcmp(argv[2], "f"))
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user = false;
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else
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return CMD_RET_USAGE;
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mtd = get_mtd_by_name(argv[1]);
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if (IS_ERR_OR_NULL(mtd))
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return CMD_RET_FAILURE;
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if (user)
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ret = mtd_get_user_prot_info(mtd, sizeof(otp_info), &retlen,
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&otp_info);
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else
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ret = mtd_get_fact_prot_info(mtd, sizeof(otp_info), &retlen,
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&otp_info);
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if (ret) {
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pr_err("OTP info failed: %d\n", ret);
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ret = CMD_RET_FAILURE;
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goto put_mtd;
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}
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if (retlen != sizeof(otp_info)) {
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pr_err("OTP info returns %zu, but %zu expected\n",
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retlen, sizeof(otp_info));
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ret = CMD_RET_FAILURE;
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goto put_mtd;
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}
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printf("%s OTP region info:\n", user ? "User" : "Factory");
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printf("\tstart: %u\n", otp_info.start);
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printf("\tlength: %u\n", otp_info.length);
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printf("\tlocked: %u\n", otp_info.locked);
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ret = CMD_RET_SUCCESS;
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put_mtd:
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put_mtd_device(mtd);
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return ret;
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}
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#endif
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static int do_mtd_list(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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@ -551,6 +769,12 @@ U_BOOT_LONGHELP(mtd,
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"\n"
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"Specific functions:\n"
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"mtd bad <name>\n"
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#if CONFIG_IS_ENABLED(CMD_MTD_OTP)
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"mtd otpread <name> [u|f] <off> <size>\n"
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"mtd otpwrite <name> <off> <hex string>\n"
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"mtd otplock <name> <off> <size>\n"
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"mtd otpinfo <name> [u|f]\n"
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#endif
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"\n"
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"With:\n"
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"\t<name>: NAND partition/chip name (or corresponding DM device name or OF path)\n"
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@ -561,10 +785,20 @@ U_BOOT_LONGHELP(mtd,
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"\t<size>: length of the operation in bytes (default: the entire device)\n"
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"\t\t* must be a multiple of a block for erase\n"
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"\t\t* must be a multiple of a page otherwise (special case: default is a page with dump)\n"
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#if CONFIG_IS_ENABLED(CMD_MTD_OTP)
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"\t<hex string>: hex string without '0x' and spaces. Example: ABCD1234\n"
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"\t[u|f]: user or factory OTP region\n"
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#endif
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"\n"
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"The .dontskipff option forces writing empty pages, don't use it if unsure.\n");
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U_BOOT_CMD_WITH_SUBCMDS(mtd, "MTD utils", mtd_help_text,
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#if CONFIG_IS_ENABLED(CMD_MTD_OTP)
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U_BOOT_SUBCMD_MKENT(otpread, 5, 1, do_mtd_otp_read),
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U_BOOT_SUBCMD_MKENT(otpwrite, 4, 1, do_mtd_otp_write),
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U_BOOT_SUBCMD_MKENT(otplock, 4, 1, do_mtd_otp_lock),
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U_BOOT_SUBCMD_MKENT(otpinfo, 3, 1, do_mtd_otp_info),
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#endif
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U_BOOT_SUBCMD_MKENT(list, 1, 1, do_mtd_list),
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U_BOOT_SUBCMD_MKENT_COMPLETE(read, 5, 0, do_mtd_io,
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mtd_name_complete),
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