DCMD_MMCSD_GET_CSD

Arguments to devctl():

Description:

This command gets card-specific data.

Input:

None.

Output:

A filled-in MMCSD_CSD structure:

typedef struct _mmc_csd_ext {
        uint32_t        hs_max_dtr;
        uint32_t        sectors;
        uint8_t         erase_grp_def;
        uint8_t         hc_erase_group_size;
        uint8_t         hc_wp_grp_size;
        uint8_t         user_wp;
} MMC_CSD_EXT;

typedef struct _mmcsd_csd {
        uint32_t        flags;
        uint8_t         rsvd[4];
        union {
                struct {
                        uint8_t         csd_structure;  /* CSD structure */
                        uint8_t         taac;
                        uint8_t         nsac;
                        uint8_t         tran_speed;
                        uint16_t        ccc;
                        uint8_t         read_bl_len;
                        uint8_t         read_bl_partial;
                        uint8_t         write_blk_misalign;
                        uint8_t         read_blk_misalign;
                        uint8_t         dsr_imp;
                        union {
                                struct {
                                        uint16_t        c_size;
                                        uint8_t         vdd_r_curr_min;
                                        uint8_t         vdd_r_curr_max;
                                        uint8_t         vdd_w_curr_min;
                                        uint8_t         vdd_w_curr_max;
                                        uint8_t         c_size_mult;
                                } csd_ver1;
                                struct {
                                        uint32_t        c_size;
                                } csd_ver2;
                        }csd;
                        uint8_t         erase_blk_en;
                        uint8_t         sector_size;
                        uint8_t         wp_grp_size;
                        uint8_t         wp_grp_enable;
                        uint8_t         r2w_factor;
                        uint8_t         write_bl_len;
                        uint8_t         write_bl_partial;
                        uint8_t         file_format_grp;
                        uint8_t         copy;
                        uint8_t         perm_write_protect;
                        uint8_t         tmp_write_protect;
                        uint8_t         file_format;
                } sd_csd;
                struct {
                        uint8_t         csd_structure;  /* CSD structure */
                        uint8_t         mmc_prot;
                        uint8_t         taac;
                        uint8_t         nsac;
                        uint8_t         tran_speed;
                        uint16_t        ccc;
                        uint8_t         read_bl_len;
                        uint8_t         read_bl_partial;
                        uint8_t         write_blk_misalign;
                        uint8_t         read_blk_misalign;
                        uint8_t         dsr_imp;
                        uint16_t        c_size;
                        uint8_t         vdd_r_curr_min;
                        uint8_t         vdd_r_curr_max;
                        uint8_t         vdd_w_curr_min;
                        uint8_t         vdd_w_curr_max;
                        uint8_t         c_size_mult;
                        union {
                                struct {        /* MMC system specification version 3.1 */
                                        uint8_t erase_grp_size;
                                        uint8_t erase_grp_mult;
                                } mmc_v31;
                                struct {        /* MMC system specification version 2.2 */
                                        uint8_t sector_size;
                                        uint8_t erase_grp_size;
                                } mmc_v22;
                        } erase;
                        MMC_CSD_EXT     ext_csd;
                        uint8_t         wp_grp_size;
                        uint8_t         wp_grp_enable;
                        uint8_t         r2w_factor;
                        uint8_t         write_bl_len;
                        uint8_t         write_bl_partial;
        /*      uint8_t         file_format_grp; */
                        uint8_t         copy;
                        uint8_t         perm_write_protect;
                        uint8_t         tmp_write_protect;
                        uint8_t         ecc;
                } mmc_csd;
        } csd;
        pid_t           pid;                    /* Store PID of driver process for this device */
        uint8_t         csd_version;            /* CSD structure version */
        uint8_t         mmcprot_version;        /* MMC proto version */
        uint8_t         type;                   /* card type, MMC or SD for now */
} MMCSD_CSD;

See also:

devctl() in the QNX OS C Library Reference