| #pragma once |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/fsm.h> |
| #include <osmocom/core/isdnhdlc.h> |
| |
| struct osmo_e1f_tx_state { |
| bool remote_alarm; |
| bool crc4_error; |
| bool ais; |
| /* lower 5 bits: Sa4..Sa8 */ |
| uint8_t sa4_sa8; |
| /* frame number 0..15 */ |
| uint8_t frame_nr; |
| uint8_t crc4_last_smf; |
| uint8_t crc4; |
| }; |
| |
| struct osmo_e1f_rx_state { |
| uint8_t frame_nr; |
| /* history of rceived TS0 octets */ |
| uint8_t ts0_history[16]; |
| uint8_t ts0_hist_len; |
| /* was a remote alarm received? */ |
| bool remote_alarm; |
| bool remote_crc4_error; |
| /* number of TS0 bytes received since entering CRC mframe search */ |
| uint8_t num_ts0_in_mframe_search; |
| struct osmo_fsm_inst *fi; |
| /* computed CRC4 */ |
| uint8_t crc4_last_smf; |
| uint8_t crc4; |
| }; |
| |
| enum osmo_e1f_notify_event { |
| E1_NTFY_EVT_ALIGN_FRAME, |
| E1_NTFY_EVT_ALIGN_CRC_MFRAME, |
| E1_NTFY_EVT_CRC_ERROR, |
| E1_NTFY_EVT_REMOTE_CRC_ERROR, |
| E1_NTFY_EVT_REMOTE_ALARM, |
| }; |
| |
| enum osmo_e1f_ts_mode { |
| OSMO_E1F_TS_RAW, |
| OSMO_E1F_TS_HDLC_CRC, |
| }; |
| |
| struct osmo_e1f_instance_ts; |
| struct osmo_e1f_instance; |
| typedef void (*e1_data_cb)(struct osmo_e1f_instance_ts *ts, struct msgb *msg); |
| typedef void (*e1_notify_cb)(struct osmo_e1f_instance *e1i, enum osmo_e1f_notify_event evt, |
| bool present, void *data); |
| |
| struct osmo_e1f_instance_ts { |
| /* timeslot number */ |
| uint8_t ts_nr; |
| /* mode in which we operate (RAW/HDLC) */ |
| enum osmo_e1f_ts_mode mode; |
| /* back-pointer to e1 instance */ |
| struct osmo_e1f_instance *inst; |
| struct { |
| /* optional HDLC encoder state */ |
| struct osmo_isdnhdlc_vars hdlc; |
| /* queue of pending to-be-transmitted messages */ |
| struct llist_head queue; |
| unsigned long underruns; |
| } tx; |
| struct { |
| /* optional HDLC decoder state */ |
| struct osmo_isdnhdlc_vars hdlc; |
| bool enabled; |
| /* how many bytes to buffer before calling call-back */ |
| unsigned int granularity; |
| /* current receive buffer */ |
| struct msgb *msg; |
| e1_data_cb data_cb; |
| /* private data, relevant to user */ |
| void *priv; |
| } rx; |
| }; |
| |
| struct osmo_e1f_instance { |
| /* list; currently not used yet */ |
| struct llist_head list; |
| |
| /* is CRC4 generation + parsing enabled? */ |
| bool crc4_enabled; |
| /* notification call-back function */ |
| e1_notify_cb notify_cb; |
| |
| /* Rx + Tx related state */ |
| struct osmo_e1f_tx_state tx; |
| struct osmo_e1f_rx_state rx; |
| |
| /* our 32 timeslots (only 1..32 are used) */ |
| struct osmo_e1f_instance_ts ts[32]; |
| |
| /* private data, relevant to user */ |
| void *priv; |
| }; |
| |
| extern const struct value_string osmo_e1f_notifv_evt_names[]; |
| |
| static inline const char *osmo_e1f_notify_event_name(enum osmo_e1f_notify_event evt) { |
| return get_value_string(osmo_e1f_notifv_evt_names, evt); |
| } |
| |
| int osmo_e1f_init(void); |
| struct osmo_e1f_instance_ts *osmo_e1f_instance_ts(struct osmo_e1f_instance *e1i, uint8_t ts_nr); |
| int osmo_e1f_instance_init(struct osmo_e1f_instance *e1i, const char *name, e1_notify_cb cb, |
| bool crc4_enabled, void *priv); |
| void osmo_e1f_instance_reset(struct osmo_e1f_instance *e1i); |
| int osmo_e1f_ts_config(struct osmo_e1f_instance_ts *e1t, e1_data_cb cb, unsigned int granularity, |
| bool enable, enum osmo_e1f_ts_mode mode); |
| void osmo_e1f_ts_reset(struct osmo_e1f_instance_ts *e1t); |
| |
| |
| void osmo_e1f_ts_enqueue(struct osmo_e1f_instance_ts *e1t, struct msgb *msg); |
| int osmo_e1f_pull_tx_frame(struct osmo_e1f_instance *e1i, uint8_t *out_frame); |
| int osmo_e1f_rx_frame(struct osmo_e1f_instance *e1i, const uint8_t *in_frame); |