57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#ifndef _SERCOMM_H
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#define _SERCOMM_H
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/* SERCOMM layer on UART1 (modem UART) */
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#include <osmocore/msgb.h>
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#define SERCOMM_UART_NR 1
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#define HDLC_FLAG 0x7E
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#define HDLC_ESCAPE 0x7D
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#define HDLC_C_UI 0x03
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#define HDLC_C_P_BIT (1 << 4)
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#define HDLC_C_F_BIT (1 << 4)
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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_MAX
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};
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void sercomm_init(void);
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int sercomm_initialized(void);
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/* User Interface: Tx */
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/* user interface for transmitting messages for a given DLCI */
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void sercomm_sendmsg(uint8_t dlci, struct msgb *msg);
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/* how deep is the Tx queue for a given DLCI */
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unsigned int sercomm_tx_queue_depth(uint8_t dlci);
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/* User Interface: Rx */
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/* receiving messages for a given DLCI */
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typedef void (*dlci_cb_t)(uint8_t dlci, struct msgb *msg);
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int sercomm_register_rx_cb(uint8_t dlci, dlci_cb_t cb);
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/* Driver Interface */
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/* fetch one octet of to-be-transmitted serial data. returns 0 if no more data */
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int sercomm_drv_pull(uint8_t *ch);
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/* the driver has received one byte, pass it into sercomm layer.
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returns 1 in case of success, 0 in case of unrecognized char */
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int sercomm_drv_rx_char(uint8_t ch);
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static inline struct msgb *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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