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#ifndef _L1_SYNC_H
#define _L1_SYNC_H
#include <osmocore/linuxlist.h>
#include <osmocore/gsm_utils.h>
#include <layer1/tdma_sched.h>
#include <l1a_l23_interface.h>
/* structure representing L1 sync information about a cell */
struct l1_cell_info {
/* on which ARFCN (+band) is the cell? */
uint16_t arfcn;
/* what's the BSIC of the cell (from SCH burst decoding) */
uint32_t bsic;
/* whats the delta of the cells current GSM frame number
* compared to our current local frame number */
int32_t fn_offset;
/* how much does the TPU need adjustment (delta) to synchronize
* with the cells burst */
uint32_t time_alignment;
/* FIXME: should we also store the AFC value? */
};
enum l1s_chan {
L1S_CHAN_MAIN,
L1S_CHAN_SACCH,
_NUM_L1S_CHAN
};
#define L1S_NUM_NEIGH_CELL 6
struct l1s_state {
struct gsm_time current_time; /* current GSM time */
struct gsm_time next_time; /* GSM time at next TMDMA irq */
/* the cell on which we are camping right now */
struct l1_cell_info serving_cell;
/* neighbor cell sync info */
struct l1_cell_info neigh_cell[L1S_NUM_NEIGH_CELL];
/* TDMA scheduler */
struct tdma_scheduler tdma_sched;
/* The current TPU offset register */
uint32_t tpu_offset;
/* Transmit queues of pending packets for main DCCH and ACCH */
struct llist_head tx_queue[_NUM_L1S_CHAN];
/* bit-mask of multi-frame tasks that are currently active */
uint32_t mf_tasks;
/* Structures below are for L1-task specific parameters, used
* to communicate between l1-sync and l1-async (l23_api) */
struct {
/* power measurement l1 task */
unsigned int mode;
union {
struct {
uint16_t arfcn_start;
uint16_t arfcn_next;
uint16_t arfcn_end;
} range;
};
struct msgb *msg;
} pm;
struct {
uint8_t ra;
} rach;
};
extern struct l1s_state l1s;
enum l1_sig_num {
L1_SIG_PM, /* Power Measurement */
L1_SIG_NB, /* Normal Burst */
};
struct l1s_meas_hdr {
uint16_t snr; /* signal/noise ratio */
int16_t toa_qbit; /* time of arrival (qbits) */
int16_t pm_dbm8; /* power level in dbm/8 */
int16_t freq_err; /* Frequency error in Hz */
};
struct l1_signal {
uint16_t signum;
uint16_t arfcn;
union {
struct {
int16_t dbm8[2];
} pm;
struct {
struct l1s_meas_hdr meas[4];
uint16_t crc;
uint16_t fire;
uint16_t num_biterr;
uint8_t frame[24];
} nb;
};
};
typedef void (*l1s_cb_t)(struct l1_signal *sig);
void l1s_set_handler(l1s_cb_t handler);
int16_t l1s_snr_int(uint16_t snr);
uint16_t l1s_snr_fract(uint16_t snr);
void l1s_dsp_abort(void);
void l1s_fb_test(uint8_t base_fn, uint8_t fb_mode);
void l1s_sb_test(uint8_t base_fn);
void l1s_pm_test(uint8_t base_fn, uint16_t arfcn);
void l1s_nb_test(uint8_t base_fn);
void l1s_init(void);
/* reset the layer1 as part of synchronizing to a new cell */
void l1s_reset(void);
/* init.c */
void layer1_init(void);
#endif /* _L1_SYNC_H */
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