summaryrefslogtreecommitdiff
path: root/common
diff options
context:
space:
mode:
authorRyan QIAN <b32804@freescale.com>2011-11-02 10:22:16 +0800
committerRyan QIAN <b32804@freescale.com>2011-11-02 10:22:16 +0800
commit822c9266e666d64f5570c5bfcd4d5460fc635b9e (patch)
tree06956ee46b1536de7dc1a74c0aef75937ab19101 /common
parent3dc5c067ea894b909bd6404530e399f90e78b8fe (diff)
downloadu-boot-imx-822c9266e666d64f5570c5bfcd4d5460fc635b9e.zip
u-boot-imx-822c9266e666d64f5570c5bfcd4d5460fc635b9e.tar.gz
u-boot-imx-822c9266e666d64f5570c5bfcd4d5460fc635b9e.tar.bz2
ENGR00139215 iMX61 Uboot support blow fuse
1. add force option to blow operation 2. add blown value check 3. add simple validation for zeros returned by 'simple_strtoul' call Signed-off-by: Ryan QIAN <b32804@freescale.com>
Diffstat (limited to 'common')
-rw-r--r--common/Makefile1
-rw-r--r--common/cmd_imxotp.c156
2 files changed, 157 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile
index f4d2cbd..1f218e7 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -171,6 +171,7 @@ COBJS-$(CONFIG_MODEM_SUPPORT) += modem.o
COBJS-$(CONFIG_UPDATE_TFTP) += update.o
COBJS-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
COBJS-$(CONFIG_FASTBOOT) += cmd_fastboot.o
+COBJS-$(CONFIG_CMD_IMXOTP) += cmd_imxotp.o
COBJS := $(sort $(COBJS-y))
SRCS := $(AOBJS:.o=.S) $(COBJS:.o=.c)
diff --git a/common/cmd_imxotp.c b/common/cmd_imxotp.c
new file mode 100644
index 0000000..b976aaa
--- /dev/null
+++ b/common/cmd_imxotp.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <command.h>
+#include <imx_otp.h>
+
+/*
+ * meant to reject most of the zeros return by simple_strtoul call.
+ *
+ */
+int validate_zero_from_simple_strtoul(char *str)
+{
+ int i = 0;
+
+ /* reject negatives */
+ if (str[0] == '-')
+ return -1;
+
+ /* reject no zero initialed */
+ if (str[0] != '0')
+ return -1;
+
+ /* accept zero */
+ if (strlen(str) == 1)
+ return 0;
+
+ /* only accept started with "0x" or "0X" or "00" */
+ if (str[1] != 'x' && str[1] != 'X' && str[1] != '0')
+ return -1;
+
+ /* reject "0x" or "0X" or "00" only */
+ if (strlen(str) == 3)
+ return -1;
+
+ /* only accept all zeros */
+ for (i = 1; i < strlen(str) - 1; i++) {
+ if (str[1] != '0')
+ return -1;
+ }
+ return 0;
+}
+
+int do_imxotp(cmd_tbl_t *cmd_tbl, int flag, int argc, char* argv[])
+{
+ u32 addr, value_read, fused_value, value_to_fuse;
+ int force_to_fuse = 0;
+
+ if (argc < 3) {
+usage:
+ cmd_usage(cmd_tbl);
+ return 1;
+ }
+
+ if (!strcmp(argv[1], "read")) {
+ switch (argc) {
+ case 3:
+ addr = simple_strtoul(argv[2], NULL, 16);
+ if ((addr == 0) &&
+ validate_zero_from_simple_strtoul(argv[2]))
+ goto usage;
+ break;
+ default:
+ goto usage;
+ }
+ printf("Reading fuse at index: 0x%X\n", addr);
+ if (imx_otp_read_one_u32(addr, &value_read))
+ return -1;
+ printf("Fuse at (index: 0x%X) value: 0x%X\n", addr, value_read);
+ } else if (!strcmp(argv[1], "blow")) {
+ if (argc < 4 || argc > 5)
+ goto usage;
+
+ if (!strcmp(argv[2], "--force")) {
+ force_to_fuse = 1;
+ addr = simple_strtoul(argv[3], NULL, 16);
+ if ((addr == 0)
+ && validate_zero_from_simple_strtoul(argv[3]))
+ goto usage;
+ value_to_fuse = simple_strtoul(argv[4], NULL, 16);
+ if ((value_to_fuse == 0)
+ && validate_zero_from_simple_strtoul(argv[4]))
+ goto usage;
+ } else {
+ addr = simple_strtoul(argv[2], NULL, 16);
+ if ((addr == 0)
+ && validate_zero_from_simple_strtoul(argv[2]))
+ goto usage;
+ value_to_fuse = simple_strtoul(argv[3], NULL, 16);
+ if ((value_to_fuse == 0)
+ && validate_zero_from_simple_strtoul(argv[3]))
+ goto usage;
+ }
+
+ /* show the current value of specified address (fuse index) */
+ if (imx_otp_read_one_u32(addr, &value_read))
+ return -1;
+ printf("Current fuse at (index: 0x%X) value: 0x%X\n",
+ addr, value_read);
+
+ if ((value_to_fuse & value_read) == value_to_fuse)
+ printf("!! Fuse blow skipped:"
+ " the bits have been already set.\n");
+ else if (force_to_fuse) {
+ printf("Blowing fuse at index: 0x%X, value: 0x%X\n",
+ addr, value_to_fuse);
+ if (imx_otp_blow_one_u32(addr,
+ value_to_fuse, &fused_value)) {
+ printf("ERROR: failed to blow fuse"
+ " at 0x%X with value of 0x%X\n",
+ addr, value_to_fuse);
+ } else {
+ printf("Operation %s fuse"
+ " at (index: 0x%X) value: 0x%X\n",
+ ((fused_value & value_to_fuse) ==
+ value_to_fuse) ? "succeeded"
+ : "failed",
+ addr, fused_value);
+ }
+ } else {
+ printf("!! Fuse blow aborted."
+ " if you do want to blow it."
+ " Please use the command:\n"
+ "%s blow --force %X %X\n",
+ argv[0], addr, value_to_fuse);
+ }
+ } else
+ goto usage;
+
+ return 0;
+}
+
+U_BOOT_CMD(imxotp, 5, 0, do_imxotp,
+ "One-Time Programable sub-system",
+ "imxotp read <addr>\n"
+ " - read fuse at 'addr'\n"
+ "imxotp blow [--force] <addr> <value>\n"
+ " - blow fuse at 'addr' with hex value 'value'\n"
+);