mirror of https://gerrit.osmocom.org/libosmocore
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
#ifndef _SERCOMM_H
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#define _SERCOMM_H
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#include <osmocom/core/msgb.h>
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/* a low sercomm_dlci means high priority. A high DLCI means low priority */
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enum sercomm_dlci {
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SC_DLCI_HIGHEST = 0,
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SC_DLCI_DEBUG = 4,
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SC_DLCI_L1A_L23 = 5,
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SC_DLCI_LOADER = 9,
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SC_DLCI_CONSOLE = 10,
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SC_DLCI_ECHO = 128,
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_SC_DLCI_MAX
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};
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struct osmo_sercomm_inst;
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/*! \brief call-back function for per-DLC receive handler
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* \param[in] sercomm instance on which msg was received
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* \param[in] dlci DLC Identifier of received msg
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* \param[in] msg received message that needs to be processed */
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typedef void (*dlci_cb_t)(struct osmo_sercomm_inst *sercomm, uint8_t dlci, struct msgb *msg);
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/*! \brief one instance of a sercomm multiplex/demultiplex */
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struct osmo_sercomm_inst {
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/*! \brief Has this instance been initialized? */
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int initialized;
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/*! \brief UART Identifier */
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int uart_id;
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/*! \brief transmit side */
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struct {
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/*! \brief per-DLC queue of pending transmit msgbs */
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struct llist_head dlci_queues[_SC_DLCI_MAX];
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/*! \brief msgb currently being transmitted */
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struct msgb *msg;
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/*! \brief transmit state */
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int state;
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/*! \brief next to-be-transmitted char in msg */
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uint8_t *next_char;
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} tx;
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/*! \brief receive side */
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struct {
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/*! \brief per-DLC handler call-back functions */
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dlci_cb_t dlci_handler[_SC_DLCI_MAX];
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/*! \brief msgb allocation size for rx msgs */
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unsigned int msg_size;
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/*! \brief currently received msgb */
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struct msgb *msg;
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/*! \brief receive state */
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int state;
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/*! \brief DLCI of currently received msgb */
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uint8_t dlci;
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/*! \brief CTRL of currently received msgb */
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uint8_t ctrl;
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} rx;
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};
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#ifdef EMBEDDED
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#include <uart.h>
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/* helper functions for target */
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void osmo_sercomm_change_speed(struct osmo_sercomm_inst *sercomm, enum uart_baudrate bdrt);
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#endif
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void osmo_sercomm_init(struct osmo_sercomm_inst *sercomm);
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int osmo_sercomm_initialized(struct osmo_sercomm_inst *sercomm);
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/* User Interface: Tx */
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void osmo_sercomm_sendmsg(struct osmo_sercomm_inst *sercomm, uint8_t dlci, struct msgb *msg);
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unsigned int osmo_sercomm_tx_queue_depth(struct osmo_sercomm_inst *sercomm, uint8_t dlci);
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/* User Interface: Rx */
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int osmo_sercomm_register_rx_cb(struct osmo_sercomm_inst *sercomm, uint8_t dlci, dlci_cb_t cb);
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/* Driver Interface */
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int osmo_sercomm_drv_pull(struct osmo_sercomm_inst *sercomm, uint8_t *ch);
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int osmo_sercomm_drv_rx_char(struct osmo_sercomm_inst *sercomm, uint8_t ch);
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static inline struct msgb *osmo_sercomm_alloc_msgb(unsigned int len)
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{
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return msgb_alloc_headroom(len+4, 4, "sercomm_tx");
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}
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#endif /* _SERCOMM_H */
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