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/* Messages to be sent between the different layers */
/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
* (C) 2010 by Holger Hans Peter Freyther
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef l1a_l23_interface_h
#define l1a_l23_interface_h
#define SYNC_NEW_CCCH_REQ 1
#define SYNC_NEW_CCCH_RESP 2
#define CCCH_INFO_IND 3
#define CCCH_RACH_REQ 4
#define DEDIC_MODE_EST_REQ 5
#define DEDIC_MODE_DATA_IND 6
#define DEDIC_MODE_DATA_REQ 7
#define LAYER1_RESET 8
/*
* NOTE: struct size. We do add manual padding out of the believe
* that it will avoid some unaligned access.
*/
struct gsm_time {
uint32_t fn; /* FN count */
uint16_t t1; /* FN div (26*51) */
uint8_t t2; /* FN modulo 26 */
uint8_t t3; /* FN modulo 51 */
uint8_t tc;
};
/*
* downlink info ... down from the BTS..
*/
struct l1_info_dl {
uint8_t msg_type;
uint8_t padding;
/* the ARFCN and the band. */
uint16_t band_arfcn;
struct gsm_time time;
uint8_t rx_level;
uint16_t snr[4];
} __attribute__((packed));
/* new CCCH was found. This is following the header */
struct l1_sync_new_ccch_resp {
uint8_t bsic;
uint8_t padding[3];
} __attribute__((packed));
/* data on the CCCH was found. This is following the header */
struct l1_ccch_info_ind {
uint8_t data[23];
} __attribute__((packed));
/*
* uplink info
*/
struct l1_info_ul {
uint8_t msg_type;
uint8_t padding;
uint8_t tx_power;
uint8_t channel_number;
uint32_t tdma_frame;
uint8_t payload[0];
} __attribute__((packed));
/*
* msg for SYNC_NEW_CCCH_REQ
* the l1_info_ul header is in front
*/
struct l1_sync_new_ccch_req {
uint16_t band_arfcn;
} __attribute__((packed));
/* the l1_info_ul header is in front */
struct l1_rach_req {
uint8_t ra;
uint8_t padding[3];
} __attribute__((packed));
struct l1_dedic_mode_est_req {
struct l1_info_ul header;
uint16_t band_arfcn;
union {
struct {
uint8_t maio_high:4,
h:1,
tsc:3;
uint8_t hsn:6,
maio_low:2;
} h1;
struct {
uint8_t arfcn_high:2,
spare:2,
h:1,
tsc:3;
uint8_t arfcn_low;
} h0;
};
} __attribute__((packed));
/* it is like the ccch ind... unite it? */
/* the l1_info_dl header is in front */
struct l1_dedic_mode_data_ind {
uint8_t data[23];
} __attribute__((packed));
/* the l1_info_ul header is in front */
struct l1_dedic_mode_data_req {
uint8_t data[23];
} __attribute__((packed));
#endif
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