Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _HVSI_H
#define _HVSI_H
 
#define VS_DATA_PACKET_HEADER           0xff
#define VS_CONTROL_PACKET_HEADER        0xfe
#define VS_QUERY_PACKET_HEADER          0xfd
#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
 
/* control verbs */
#define VSV_SET_MODEM_CTL    1 /* to service processor only */
#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
#define VSV_CLOSE_PROTOCOL   3
 
/* query verbs */
#define VSV_SEND_VERSION_NUMBER 1
#define VSV_SEND_MODEM_CTL_STATUS 2
 
/* yes, these masks are not consecutive. */
#define HVSI_TSDTR 0x01
#define HVSI_TSCD  0x20
 
#define HVSI_MAX_OUTGOING_DATA 12
#define HVSI_VERSION 1
 
struct hvsi_header {
<------>uint8_t  type;
<------>uint8_t  len;
<------>__be16 seqno;
} __attribute__((packed));
 
struct hvsi_data {
<------>struct hvsi_header hdr;
<------>uint8_t  data[HVSI_MAX_OUTGOING_DATA];
} __attribute__((packed));
 
struct hvsi_control {
<------>struct hvsi_header hdr;
<------>__be16 verb;
<------>/* optional depending on verb: */
<------>__be32 word;
<------>__be32 mask;
} __attribute__((packed));
 
struct hvsi_query {
<------>struct hvsi_header hdr;
<------>__be16 verb;
} __attribute__((packed));
 
struct hvsi_query_response {
<------>struct hvsi_header hdr;
<------>__be16 verb;
<------>__be16 query_seqno;
<------>union {
<------><------>uint8_t  version;
<------><------>__be32 mctrl_word;
<------>} u;
} __attribute__((packed));
 
/* hvsi lib struct definitions */
#define HVSI_INBUF_SIZE		255
struct tty_struct;
struct hvsi_priv {
<------>unsigned int	inbuf_len;	/* data in input buffer */
<------>unsigned char	inbuf[HVSI_INBUF_SIZE];
<------>unsigned int	inbuf_cur;	/* Cursor in input buffer */
<------>unsigned int	inbuf_pktlen;	/* packet length from cursor */
<------>atomic_t	seqno;		/* packet sequence number */
<------>unsigned int	opened:1;	/* driver opened */
<------>unsigned int	established:1;	/* protocol established */
<------>unsigned int 	is_console:1;	/* used as a kernel console device */
<------>unsigned int	mctrl_update:1;	/* modem control updated */
<------>unsigned short	mctrl;		/* modem control */
<------>struct tty_struct *tty;		/* tty structure */
<------>int (*get_chars)(uint32_t termno, char *buf, int count);
<------>int (*put_chars)(uint32_t termno, const char *buf, int count);
<------>uint32_t	termno;
};
 
/* hvsi lib functions */
struct hvc_struct;
extern void hvsilib_init(struct hvsi_priv *pv,
<------><------><------> int (*get_chars)(uint32_t termno, char *buf, int count),
<------><------><------> int (*put_chars)(uint32_t termno, const char *buf,
<------><------><------><------><------>  int count),
<------><------><------> int termno, int is_console);
extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
extern void hvsilib_establish(struct hvsi_priv *pv);
extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
 
#endif /* _HVSI_H */