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#pragma once
#include <stdint.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/utils.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/core/linuxlist.h>
#include "logging.h"
#include "scheduler.h"
#define GSM_BURST_LEN 148
#define GSM_BURST_PL_LEN 116
#define GPRS_BURST_LEN GSM_BURST_LEN
#define EDGE_BURST_LEN 444
#define TRX_CH_FLAG_PDCH (1 << 0)
#define TRX_CH_FLAG_AUTO (1 << 1)
#define TRX_TS_COUNT 8
#define MAX_A5_KEY_LEN (128 / 8)
/* Forward declaration to avoid mutual include */
struct trx_instance;
struct trx_ts;
enum trx_burst_type {
TRX_BURST_GMSK,
TRX_BURST_8PSK,
};
/**
* These types define the different channels on a multiframe.
* Each channel has queues and can be activated individually.
*/
enum trx_lchan_type {
TRXC_IDLE = 0,
TRXC_FCCH,
TRXC_SCH,
TRXC_BCCH,
TRXC_RACH,
TRXC_CCCH,
TRXC_TCHF,
TRXC_TCHH_0,
TRXC_TCHH_1,
TRXC_SDCCH4_0,
TRXC_SDCCH4_1,
TRXC_SDCCH4_2,
TRXC_SDCCH4_3,
TRXC_SDCCH8_0,
TRXC_SDCCH8_1,
TRXC_SDCCH8_2,
TRXC_SDCCH8_3,
TRXC_SDCCH8_4,
TRXC_SDCCH8_5,
TRXC_SDCCH8_6,
TRXC_SDCCH8_7,
TRXC_SACCHTF,
TRXC_SACCHTH_0,
TRXC_SACCHTH_1,
TRXC_SACCH4_0,
TRXC_SACCH4_1,
TRXC_SACCH4_2,
TRXC_SACCH4_3,
TRXC_SACCH8_0,
TRXC_SACCH8_1,
TRXC_SACCH8_2,
TRXC_SACCH8_3,
TRXC_SACCH8_4,
TRXC_SACCH8_5,
TRXC_SACCH8_6,
TRXC_SACCH8_7,
TRXC_PDTCH,
TRXC_PTCCH,
_TRX_CHAN_MAX
};
typedef int trx_lchan_rx_func(struct trx_instance *trx,
struct trx_ts *ts,
uint32_t fn, enum trx_lchan_type chan,
uint8_t bid, sbit_t *bits, uint16_t nbits,
int8_t rssi, float toa);
typedef int trx_lchan_tx_func(struct trx_instance *trx,
struct trx_ts *ts,
uint32_t fn, enum trx_lchan_type chan,
uint8_t bid, uint16_t *nbits);
struct trx_lchan_desc {
/*! \brief TRX Channel Type */
enum trx_lchan_type chan;
/*! \brief Human-readable name */
const char *name;
/*! \brief Channel Number (like in RSL) */
uint8_t chan_nr;
/*! \brief Link ID (like in RSL) */
uint8_t link_id;
/*! \brief How much memory do we need to store bursts */
size_t burst_buf_size;
/*! \brief Channel specific flags */
uint8_t flags;
/*! \brief Function to call when burst received from PHY */
trx_lchan_rx_func *rx_fn;
/*! \brief Function to call when data received from L2 */
trx_lchan_tx_func *tx_fn;
};
struct trx_frame {
/*! \brief Downlink TRX channel type */
enum trx_lchan_type dl_chan;
/*! \brief Downlink block ID */
uint8_t dl_bid;
/*! \brief Uplink TRX channel type */
enum trx_lchan_type ul_chan;
/*! \brief Uplink block ID */
uint8_t ul_bid;
};
struct trx_multiframe {
/*! \brief Channel combination */
enum gsm_phys_chan_config chan_config;
/*! \brief Human-readable name */
const char *name;
/*! \brief Repeats how many frames */
uint8_t period;
/*! \brief Applies to which timeslots */
uint8_t slotmask;
/*! \brief Contains which lchans */
uint64_t lchan_mask;
/*! \brief Pointer to scheduling structure */
const struct trx_frame *frames;
};
/* States each channel on a multiframe */
struct trx_lchan_state {
/*! \brief Channel type */
enum trx_lchan_type type;
/*! \brief Channel status */
uint8_t active;
/*! \brief Burst type: GMSK or 8PSK */
enum trx_burst_type burst_type;
/*! \brief Frame number of first burst */
uint32_t rx_first_fn;
/*! \brief Mask of received bursts */
uint8_t rx_burst_mask;
/*! \brief Mask of transmitted bursts */
uint8_t tx_burst_mask;
/*! \brief Burst buffer for RX */
sbit_t *rx_bursts;
/*! \brief Burst buffer for TX */
ubit_t *tx_bursts;
/*! \brief Number of RSSI values */
uint8_t rssi_num;
/*! \brief Sum of RSSI values */
float rssi_sum;
/*! \brief Number of TOA values */
uint8_t toa_num;
/*! \brief Sum of TOA values */
float toa_sum;
/*! \brief (SACCH) loss detection */
uint8_t lost;
/*! \brief Mode for TCH channels */
uint8_t rsl_cmode, tch_mode;
/* AMR specific */
/*! \brief 4 possible codecs for AMR */
uint8_t codec[4];
/*! \brief Number of possible codecs */
int codecs;
/*! \brief Sum of bit error rates */
float ber_sum;
/*! \brief Number of bit error rates */
int ber_num;
/*! \brief Current uplink FT index */
uint8_t ul_ft;
/*! \brief Current downlink FT index */
uint8_t dl_ft;
/*! \brief Current uplink CMR index */
uint8_t ul_cmr;
/*! \brief Current downlink CMR index */
uint8_t dl_cmr;
/*! \brief If AMR loop is enabled */
uint8_t amr_loop;
/* TCH/H */
uint8_t dl_ongoing_facch; /*! \brief FACCH/H on downlink */
uint8_t ul_ongoing_facch; /*! \brief FACCH/H on uplink */
/*! \brief A5/x encryption algorithm */
int encr_algo;
int encr_key_len;
uint8_t encr_key[MAX_A5_KEY_LEN];
/*! \brief Measurements */
struct {
/*! \brief Cyclic clock counter */
uint8_t clock;
/*! \brief Last RSSI values */
int8_t rssi[32];
/*! \brief Received RSSI values */
int rssi_count;
/*! \brief Number of stored value */
int rssi_valid_count;
/*! \brief Any burst received so far */
int rssi_got_burst;
/*! \brief Sum of TOA values */
float toa_sum;
/*! \brief Number of TOA value */
int toa_num;
} meas;
};
struct trx_ts {
/*! \brief Timeslot index within a frame (0..7) */
uint8_t index;
/*! \brief Last received frame number */
uint32_t mf_last_fn;
/*! \brief Pointer to multiframe layout */
const struct trx_multiframe *mf_layout;
/*! \brief Channel states for logical channels */
struct trx_lchan_state *lchans;
/*! \brief Queue primitives for TX */
struct llist_head tx_prims;
};
/* Represents one TX primitive in the queue of trx_ts */
struct trx_ts_prim {
/*! \brief Link to queue of TS */
struct llist_head list;
/*! \brief Logical channel type */
enum trx_lchan_type chan;
/*! \brief Payload */
uint8_t payload[0];
};
extern const struct trx_lchan_desc trx_lchan_desc[_TRX_CHAN_MAX];
const struct trx_multiframe *sched_mframe_layout(
enum gsm_phys_chan_config config, int ts_num);
/* Scheduler management functions */
int sched_trx_init(struct trx_instance *trx);
int sched_trx_reset(struct trx_instance *trx, int reset_clock);
int sched_trx_shutdown(struct trx_instance *trx);
/* Timeslot management functions */
struct trx_ts *sched_trx_add_ts(struct trx_instance *trx, int ts_num);
struct trx_ts *sched_trx_find_ts(struct trx_instance *trx, int ts_num);
void sched_trx_del_ts(struct trx_instance *trx, int ts_num);
int sched_trx_reset_ts(struct trx_instance *trx, int ts_num);
int sched_trx_configure_ts(struct trx_instance *trx, int ts_num,
enum gsm_phys_chan_config config);
/* Logical channel management functions */
enum gsm_phys_chan_config sched_trx_chan_nr2pchan_config(uint8_t chan_nr);
enum trx_lchan_type sched_trx_chan_nr2lchan_type(uint8_t chan_nr);
void sched_trx_deactivate_all_lchans(struct trx_ts *ts);
int sched_trx_activate_lchan(struct trx_ts *ts, enum trx_lchan_type chan);
int sched_trx_deactivate_lchan(struct trx_ts *ts, enum trx_lchan_type chan);
struct trx_lchan_state *sched_trx_find_lchan(struct trx_ts *ts,
enum trx_lchan_type chan);
int sched_trx_handle_rx_burst(struct trx_instance *trx, uint8_t ts_num,
uint32_t burst_fn, sbit_t *bits, uint16_t nbits, int8_t rssi, float toa);
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