On 05/10/2021 14:00, Vyacheslav Bocharov wrote:

This adds support for amlogic efuse write and provides two subcommands of "sm" command: "efuseread" and "efusewrite" to read/write bytes between memory and efuse.

Signed-off-by: Vyacheslav Bocharov adeep@lexina.in

arch/arm/mach-meson/sm.c | 68 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c index 1a8f23cb1fa..fb437b94d14 100644 --- a/arch/arm/mach-meson/sm.c +++ b/arch/arm/mach-meson/sm.c @@ -68,6 +68,26 @@ ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size) return regs.regs[0]; }

+ssize_t meson_sm_write_efuse(uintptr_t offset, void *buffer, size_t size) +{

• struct pt_regs regs;
• meson_init_shmem();

•    memcpy(shmem_input, buffer, size);
  

• regs.regs[0] = FN_EFUSE_WRITE;
• regs.regs[1] = offset;
• regs.regs[2] = size;
• smc_call(&regs);
• if (regs.regs[0] == 0)

• return -1;
  

• return 0;

+}

#define SM_CHIP_ID_LENGTH 119 #define SM_CHIP_ID_OFFSET 4 #define SM_CHIP_ID_SIZE 12 @@ -187,9 +207,53 @@ static int do_sm_reboot_reason(struct cmd_tbl *cmdtp, int flag, int argc, return CMD_RET_SUCCESS; }

+static int do_efuse_read(struct cmd_tbl *cmdtp, int flag, int argc,

• 	char *const argv[])
  

+{

• ulong address, offset, size;
• int ret;
• if (argc < 4)

• return CMD_RET_USAGE;
  

•    offset = simple_strtoul(argv[1], NULL, 0);
  

•    size = simple_strtoul(argv[2], NULL, 0);
  

•    address = simple_strtoul(argv[3], NULL, 0);
  

• ret = meson_sm_read_efuse(offset, (void *)address, size);
• if (ret)

• return CMD_RET_FAILURE;
  

• return CMD_RET_SUCCESS;

+}

+static int do_efuse_write(struct cmd_tbl *cmdtp, int flag, int argc,

• 	char *const argv[])
  

+{

• ulong address, offset, size;
• int ret;
• if (argc < 4)

• return CMD_RET_USAGE;
  

•    offset = simple_strtoul(argv[1], NULL, 0);
  

•    size = simple_strtoul(argv[2], NULL, 0);
  

•    address = simple_strtoul(argv[3], NULL, 0);
  

• ret = meson_sm_write_efuse(offset, (void *)address, size);
• if (ret)

• return CMD_RET_FAILURE;
  

• return CMD_RET_SUCCESS;

+}

static struct cmd_tbl cmd_sm_sub[] = { U_BOOT_CMD_MKENT(serial, 2, 1, do_sm_serial, "", ""), U_BOOT_CMD_MKENT(reboot_reason, 1, 1, do_sm_reboot_reason, "", ""),

•    U_BOOT_CMD_MKENT(efuseread, 4, 1, do_efuse_read, "", ""),
  

•    U_BOOT_CMD_MKENT(efusewrite, 4, 0, do_efuse_write, "", ""),
  

These should be aligned with tabs

};

static int do_sm(struct cmd_tbl *cmdtp, int flag, int argc, @@ -216,5 +280,7 @@ U_BOOT_CMD( sm, 5, 0, do_sm, "Secure Monitor Control", "serial <address> - read chip unique id to memory address\n"

• "sm reboot_reason [name] - get reboot reason and store to to environment"

• "sm reboot_reason [name] - get reboot reason and store to to environment\n"

•    "sm efuseread <offset> <size> <address> - read efuse to memory address\n"
  

•    "sm efusewrite <offset> <size> <address> - write into efuse from memory address"
  

Same here

);

Applied to u-boot-amlogic while fixing indent

Thanks, Neil