This patch allows to read back the EXT_CSD[179] partition_config register, just specifying the dev param:
U-Boot> mmc partconf 0 EXT_CSD[179], PARTITION_CONFIG register: BOOT_ACK: 0 BOOT_PARTITION_ENABLE: 0 PARTITION_ACCESS: 0
Signed-off-by: Angelo Dureghello angelo@sysam.it --- Changes for v2: - fixed commit message - added white lines in cmd/mmc.c - fixed help in cmd/mmc.c --- cmd/mmc.c | 35 +++++++++++++++++++++++++++++------ drivers/mmc/mmc.c | 33 +++++++++++++++++++++++++++++++++ include/mmc.h | 6 ++++++ 3 files changed, 68 insertions(+), 6 deletions(-)
diff --git a/cmd/mmc.c b/cmd/mmc.c index 39ef072..de28749 100644 --- a/cmd/mmc.c +++ b/cmd/mmc.c @@ -697,6 +697,24 @@ static int do_mmc_boot_resize(cmd_tbl_t *cmdtp, int flag, printf("EMMC RPMB partition Size %d MB\n", rpmbsize); return CMD_RET_SUCCESS; } + +static int do_mmc_partconf_read(struct mmc *mmc) +{ + int err; + u8 ack, part_num, access; + + err = mmc_get_part_conf(mmc, &ack, &part_num, &access); + if (err) + return CMD_RET_FAILURE; + + puts("EXT_CSD[179], PARTITION_CONFIG register:\n"); + printf("BOOT_ACK: %d\n", ack); + printf("BOOT_PARTITION_ENABLE: %d\n", part_num); + printf("PARTITION_ACCESS: %d\n", access); + + return 0; +} + static int do_mmc_partconf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -704,13 +722,10 @@ static int do_mmc_partconf(cmd_tbl_t *cmdtp, int flag, struct mmc *mmc; u8 ack, part_num, access;
- if (argc != 5) + if (argc != 2 && argc != 5) return CMD_RET_USAGE;
dev = simple_strtoul(argv[1], NULL, 10); - ack = simple_strtoul(argv[2], NULL, 10); - part_num = simple_strtoul(argv[3], NULL, 10); - access = simple_strtoul(argv[4], NULL, 10);
mmc = init_mmc_device(dev, false); if (!mmc) @@ -721,9 +736,17 @@ static int do_mmc_partconf(cmd_tbl_t *cmdtp, int flag, return CMD_RET_FAILURE; }
+ if (argc == 2) + return do_mmc_partconf_read(mmc); + + ack = simple_strtoul(argv[2], NULL, 10); + part_num = simple_strtoul(argv[3], NULL, 10); + access = simple_strtoul(argv[4], NULL, 10); + /* acknowledge to be sent during boot operation */ return mmc_set_part_conf(mmc, ack, part_num, access); } + static int do_mmc_rst_func(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -858,8 +881,8 @@ U_BOOT_CMD( " - Set the BOOT_BUS_WIDTH field of the specified device\n" "mmc bootpart-resize <dev> <boot part size MB> <RPMB part size MB>\n" " - Change sizes of boot and RPMB partitions of specified device\n" - "mmc partconf dev boot_ack boot_partition partition_access\n" - " - Change the bits of the PARTITION_CONFIG field of the specified device\n" + "mmc partconf dev [boot_ack boot_partition partition_access]\n" + " - Show or change the bits of the PARTITION_CONFIG field of the specified device\n" "mmc rst-function dev value\n" " - Change the RST_n_FUNCTION field of the specified device\n" " WARNING: This is a write-once field and 0 / 1 / 2 are the only valid values.\n" diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index d3c22ab..4cb3706 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1954,6 +1954,39 @@ int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access) }
/* + * Read EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG) + * and returning the extracted fields BOOT_ACK, BOOT_PARTITION_ENABLE and + * PARTITION_ACCESS. + * + * Returns 0 on success. + */ +int mmc_get_part_conf(struct mmc *mmc, u8 *ack, u8 *part_num, u8 *access) +{ + int err; + u8 part_conf; + + ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); + + mmc->erase_grp_size = 1; + mmc->part_config = MMCPART_NOAVAILABLE; + + if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4)) + return -1; + + err = mmc_send_ext_csd(mmc, ext_csd); + if (err) + return err; + + part_conf = ext_csd[EXT_CSD_PART_CONF]; + + *ack = EXT_CSD_EXTRACT_BOOT_ACK(part_conf); + *part_num = EXT_CSD_EXTRACT_BOOT_PART(part_conf); + *access = EXT_CSD_EXTRACT_PARTITION_ACCESS(part_conf); + + return 0; +} + +/* * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value * for enable. Note that this is a write-once field for non-zero values. * diff --git a/include/mmc.h b/include/mmc.h index cdb56e7..4b34b31 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -222,6 +222,10 @@ #define EXT_CSD_BOOT_PART_NUM(x) (x << 3) #define EXT_CSD_PARTITION_ACCESS(x) (x << 0)
+#define EXT_CSD_EXTRACT_BOOT_ACK(x) ((x >> 6) & 1) +#define EXT_CSD_EXTRACT_BOOT_PART(x) ((x >> 3) & 0x7) +#define EXT_CSD_EXTRACT_PARTITION_ACCESS(x) (x & 0x7) + #define EXT_CSD_BOOT_BUS_WIDTH_MODE(x) (x << 3) #define EXT_CSD_BOOT_BUS_WIDTH_RESET(x) (x << 2) #define EXT_CSD_BOOT_BUS_WIDTH_WIDTH(x) (x) @@ -428,6 +432,8 @@ int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize, unsigned long rpmbsize); /* Function to modify the PARTITION_CONFIG field of EXT_CSD */ int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access); +/* Function to read back the PARTITION_CONFIG field of EXT_CSD */ +int mmc_get_part_conf(struct mmc *mmc, u8 *ack, u8 *part_num, u8 *access); /* Function to modify the BOOT_BUS_WIDTH field of EXT_CSD */ int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode); /* Function to modify the RST_n_FUNCTION field of EXT_CSD */