sercomm.h

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#pragma once
 
#include <osmocom/core/msgb.h>
 
enum sercomm_dlci {
        SC_DLCI_HIGHEST = 0,
        SC_DLCI_DEBUG   = 4,
        SC_DLCI_L1A_L23 = 5,
        SC_DLCI_LOADER  = 9,
        SC_DLCI_CONSOLE = 10,
        SC_DLCI_ECHO    = 128,
        _SC_DLCI_MAX
};
 
struct osmo_sercomm_inst;
typedef void (*dlci_cb_t)(struct osmo_sercomm_inst *sercomm, uint8_t dlci, struct msgb *msg);
 
struct osmo_sercomm_inst {
        int initialized;
        int uart_id;
 
        struct {
                struct llist_head dlci_queues[_SC_DLCI_MAX];
                struct msgb *msg;
                int state;
                uint8_t *next_char;
        } tx;
 
        struct {
                dlci_cb_t dlci_handler[_SC_DLCI_MAX];
                unsigned int msg_size;
                struct msgb *msg;
                int state;
                uint8_t dlci;
                uint8_t ctrl;
        } rx;
};
 
 
void osmo_sercomm_init(struct osmo_sercomm_inst *sercomm);
int osmo_sercomm_initialized(struct osmo_sercomm_inst *sercomm);
 
/* User Interface: Tx */
void osmo_sercomm_sendmsg(struct osmo_sercomm_inst *sercomm, uint8_t dlci, struct msgb *msg);
unsigned int osmo_sercomm_tx_queue_depth(struct osmo_sercomm_inst *sercomm, uint8_t dlci);
 
/* User Interface: Rx */
int osmo_sercomm_register_rx_cb(struct osmo_sercomm_inst *sercomm, uint8_t dlci, dlci_cb_t cb);
 
int osmo_sercomm_change_speed(struct osmo_sercomm_inst *sercomm, uint32_t bdrt);
 
/* Driver Interface */
 
int osmo_sercomm_drv_pull(struct osmo_sercomm_inst *sercomm, uint8_t *ch);
int osmo_sercomm_drv_rx_char(struct osmo_sercomm_inst *sercomm, uint8_t ch);
 
extern void sercomm_drv_lock(unsigned long *flags);
extern void sercomm_drv_unlock(unsigned long *flags);
 
extern void sercomm_drv_start_tx(struct osmo_sercomm_inst *sercomm);
 
extern int sercomm_drv_baudrate_chg(struct osmo_sercomm_inst *sercomm, uint32_t bdrt);
 
static inline struct msgb *osmo_sercomm_alloc_msgb(unsigned int len)
{
        return msgb_alloc_headroom(len+4, 4, "sercomm_tx");
}