> Currently the only way to read the bootpart register is to dump the whole extcsd
> register. This patch adds the possibility to read the bootpart register directly for
> situations where the whole extcsd is too verbose.
>
> Signed-off-by: João Loureiro <joao.loureiro@xxxxxxxxxxx>
Please update mmc.1 as well.
Other than that - looks good to me.
Thanks,
Avri
> ---
> mmc.c | 5 +++++
> mmc_cmds.c | 54
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> mmc_cmds.h | 1 +
> 3 files changed, 60 insertions(+)
>
> diff --git a/mmc.c b/mmc.c
> index bc8f74e..26c4f13 100644
> --- a/mmc.c
> +++ b/mmc.c
> @@ -126,6 +126,11 @@ static struct Command commands[] = {
> "Enable the boot partition for the <device>.\nDisable the boot partition
> for the <device> if <boot_partition> is set to 0.\nTo receive acknowledgment of
> boot from the card set <send_ack>\nto 1, else set it to 0.",
> NULL
> },
> + { do_read_boot_en, -1,
> + "bootpart read", "<device>\n"
> + "Read the boot partition information for the <device>.",
> + NULL
> + },
> { do_boot_bus_conditions_set, -4,
> "bootbus set", "<boot_mode> " "<reset_boot_bus_conditions> "
> "<boot_bus_width> " "<device>\n"
> "Set Boot Bus Conditions.\n"
> diff --git a/mmc_cmds.c b/mmc_cmds.c
> index 936e0c5..add9e56 100644
> --- a/mmc_cmds.c
> +++ b/mmc_cmds.c
> @@ -233,6 +233,29 @@ static void print_writeprotect_boot_status(__u8
> *ext_csd)
> }
> }
>
> +static void print_boot_en_status(__u8 *ext_csd) {
> + __u8 reg;
> +
> + reg = ext_csd[EXT_CSD_BOOT_CFG];
> + printf("Configuration bytes [PARTITION_CONFIG: 0x%02x]\n " \
> + "Boot partition: ", reg);
> + switch ((reg & EXT_CSD_BOOT_CFG_EN)>>3) {
> + case 0x0:
> + printf("disabled\n");
> + break;
> + case 0x1:
> + printf("1\n");
> + break;
> + case 0x2:
> + printf("2\n");
> + break;
> + case 0x7:
> + printf("user area\n");
> + break;
> + }
> +}
> +
> static int get_wp_group_size_in_blks(__u8 *ext_csd, __u32 *size) {
> __u8 ext_csd_rev = ext_csd[EXT_CSD_REV]; @@ -602,6 +625,37 @@ int
> do_disable_512B_emulation(int nargs, char **argv)
> return ret;
> }
>
> +int do_read_boot_en(int nargs, char **argv) {
> + __u8 ext_csd[512];
> + int fd, ret;
> + char *device;
> +
> + if (nargs != 2) {
> + fprintf(stderr, "Usage: mmc bootpart read </path/to/mmcblkX>\n");
> + exit(1);
> + }
> +
> + device = argv[1];
> +
> + fd = open(device, O_RDWR);
> + if (fd < 0) {
> + perror("open");
> + exit(1);
> + }
> +
> + ret = read_extcsd(fd, ext_csd);
> + if (ret) {
> + fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
> + exit(1);
> + }
> +
> + print_boot_en_status(ext_csd);
> +
> + close(fd);
> + return ret;
> +}
> +
> int do_write_boot_en(int nargs, char **argv) {
> __u8 ext_csd[512];
> diff --git a/mmc_cmds.h b/mmc_cmds.h
> index 5f2bef1..12716b5 100644
> --- a/mmc_cmds.h
> +++ b/mmc_cmds.h
> @@ -25,6 +25,7 @@ int do_writeprotect_boot_set(int nargs, char **argv); int
> do_writeprotect_user_get(int nargs, char **argv); int
> do_writeprotect_user_set(int nargs, char **argv); int
> do_disable_512B_emulation(int nargs, char **argv);
> +int do_read_boot_en(int nargs, char **argv);
> int do_write_boot_en(int nargs, char **argv); int
> do_boot_bus_conditions_set(int nargs, char **argv); int do_write_bkops_en(int
> nargs, char **argv);
> --
> 2.34.1
>
>
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