Source of myrb.c - linux-imx - PHYTEC BitBucket (Stash)

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    case READ_6:
        if (ldev_info->state == MYRB_DEVICE_WO) {
            /* Data protect, attempt to read invalid data */
            scsi_build_sense_buffer(0, scmd->sense_buffer,
                        DATA_PROTECT, 0x21, 0x06);
            scmd->result = (DRIVER_SENSE << 24) |
                SAM_STAT_CHECK_CONDITION;
            scmd->scsi_done(scmd);
            return 0;
        }
        /* fall through */
    case WRITE_6:
        lba = (((scmd->cmnd[1] & 0x1F) << 16) |
               (scmd->cmnd[2] << 8) |
               scmd->cmnd[3]);
        block_cnt = scmd->cmnd[4];
        break;
    case READ_10:
        if (ldev_info->state == MYRB_DEVICE_WO) {
            /* Data protect, attempt to read invalid data */
            scsi_build_sense_buffer(0, scmd->sense_buffer,
                        DATA_PROTECT, 0x21, 0x06);
            scmd->result = (DRIVER_SENSE << 24) |
                SAM_STAT_CHECK_CONDITION;
            scmd->scsi_done(scmd);
            return 0;
        }
        /* fall through */
    case WRITE_10:
    case VERIFY:        /* 0x2F */
    case WRITE_VERIFY:  /* 0x2E */
        lba = get_unaligned_be32(&scmd->cmnd[2]);
        block_cnt = get_unaligned_be16(&scmd->cmnd[7]);
        break;
    case READ_12:
        if (ldev_info->state == MYRB_DEVICE_WO) {
            /* Data protect, attempt to read invalid data */
            scsi_build_sense_buffer(0, scmd->sense_buffer,
                        DATA_PROTECT, 0x21, 0x06);
            scmd->result = (DRIVER_SENSE << 24) |
                SAM_STAT_CHECK_CONDITION;
            scmd->scsi_done(scmd);
            return 0;
        }
        /* fall through */
    case WRITE_12:
    case VERIFY_12: /* 0xAF */
    case WRITE_VERIFY_12:   /* 0xAE */
        lba = get_unaligned_be32(&scmd->cmnd[2]);
        block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
        break;
    default:
        /* Illegal request, invalid opcode */
        scsi_build_sense_buffer(0, scmd->sense_buffer,
                    ILLEGAL_REQUEST, 0x20, 0);