4 #include <osmocom/core/linuxlist.h>
5 #include <osmocom/gsm/gsm_utils.h>
6 #include <layer1/tdma_sched.h>
7 #include <layer1/mframe_sched.h>
8 #include <l1ctl_proto.h>
10 /* structure representing L1 sync information about a cell */
12 /* on which ARFCN (+band) is the cell? */
14 /* what's the BSIC of the cell (from SCH burst decoding) */
16 /* Combined or non-combined CCCH */
17 uint8_t ccch_mode; /* enum ccch_mode */
18 /* whats the delta of the cells current GSM frame number
19 * compared to our current local frame number */
21 /* how much does the TPU need adjustment (delta) to synchronize
22 * with the cells burst */
23 uint32_t time_alignment;
24 /* FIXME: should we also store the AFC value? */
40 typedef void l1_compl_cb(enum l1_compl c);
42 #define L1S_NUM_COMPL 32
43 #define L1S_NUM_NEIGH_CELL 6
57 struct gsm_time current_time; /* current GSM time */
58 struct gsm_time next_time; /* GSM time at next TMDMA irq */
60 /* the cell on which we are camping right now */
61 struct l1_cell_info serving_cell;
63 /* neighbor cell sync info */
64 struct l1_cell_info neigh_cell[L1S_NUM_NEIGH_CELL];
67 struct tdma_scheduler tdma_sched;
69 /* Multiframe scheduler */
70 struct mframe_scheduler mframe_sched;
72 /* The current TPU offset register */
74 int32_t tpu_offset_correction;
84 /* Transmit queues of pending packets for main DCCH and ACCH */
85 struct llist_head tx_queue[_NUM_L1S_CHAN];
88 /* Which L1A completions are scheduled right now */
89 uint32_t scheduled_compl;
90 /* callbacks for each of the completions */
91 l1_compl_cb *completion[L1S_NUM_COMPL];
93 /* Structures below are for L1-task specific parameters, used
94 * to communicate between l1-sync and l1-async (l23_api) */
96 uint8_t mode; /* FB_MODE 0/1 */
100 /* power measurement l1 task */
104 uint16_t arfcn_start;
146 /* neighbour cell power measurement process */
151 uint16_t band_arfcn[64];
156 extern struct l1s_state l1s;
158 struct l1s_meas_hdr {
159 uint16_t snr; /* signal/noise ratio */
160 int16_t toa_qbit; /* time of arrival (qbits) */
161 int16_t pm_dbm8; /* power level in dbm/8 */
162 int16_t freq_err; /* Frequency error in Hz */
165 int16_t l1s_snr_int(uint16_t snr);
166 uint16_t l1s_snr_fract(uint16_t snr);
168 void l1s_dsp_abort(void);
170 void l1s_tx_apc_helper(uint16_t arfcn);
172 /* schedule a completion */
173 void l1s_compl_sched(enum l1_compl c);
177 /* reset the layer1 as part of synchronizing to a new cell */
178 void l1s_reset(void);
181 void layer1_init(void);
183 /* A debug macro to print every TDMA frame */
184 #ifdef DEBUG_EVERY_TDMA
185 #define putchart(x) putchar(x)
190 /* Convert an angle in fx1.15 notatinon into Hz */
191 #define BITFREQ_DIV_2PI 43104 /* 270kHz / 2 * pi */
192 #define BITFREQ_DIV_PI 86208 /* 270kHz / pi */
193 #define ANG2FREQ_SCALING (2<<15) /* 2^15 scaling factor for fx1.15 */
194 #define ANGLE_TO_FREQ(angle) ((int16_t)angle * BITFREQ_DIV_PI / ANG2FREQ_SCALING)
196 void l1s_reset_hw(void);
197 void synchronize_tdma(struct l1_cell_info *cinfo);
198 void l1s_time_inc(struct gsm_time *time, uint32_t delta_fn);
199 void l1s_time_dump(const struct gsm_time *time);
201 #endif /* _L1_SYNC_H */