gsm_control_command
gsm_control_command(gsm, CMD_TEST, &gsm->ka_num,
gsm_control_command(gsm, ctrl->cmd, ctrl->data, ctrl->len);
ret = gsm_control_command(gsm, CMD_PN, (const u8 *)¶ms,
return gsm_control_command(dlci->gsm, CMD_MSC, (const u8 *)&modembits, 2);