1#ifndef _HVSI_H
2#define _HVSI_H
3
4#define VS_DATA_PACKET_HEADER           0xff
5#define VS_CONTROL_PACKET_HEADER        0xfe
6#define VS_QUERY_PACKET_HEADER          0xfd
7#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
8
9/* control verbs */
10#define VSV_SET_MODEM_CTL    1 /* to service processor only */
11#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
12#define VSV_CLOSE_PROTOCOL   3
13
14/* query verbs */
15#define VSV_SEND_VERSION_NUMBER 1
16#define VSV_SEND_MODEM_CTL_STATUS 2
17
18/* yes, these masks are not consecutive. */
19#define HVSI_TSDTR 0x01
20#define HVSI_TSCD  0x20
21
22#define HVSI_MAX_OUTGOING_DATA 12
23#define HVSI_VERSION 1
24
25struct hvsi_header {
26	uint8_t  type;
27	uint8_t  len;
28	__be16 seqno;
29} __attribute__((packed));
30
31struct hvsi_data {
32	struct hvsi_header hdr;
33	uint8_t  data[HVSI_MAX_OUTGOING_DATA];
34} __attribute__((packed));
35
36struct hvsi_control {
37	struct hvsi_header hdr;
38	__be16 verb;
39	/* optional depending on verb: */
40	__be32 word;
41	__be32 mask;
42} __attribute__((packed));
43
44struct hvsi_query {
45	struct hvsi_header hdr;
46	__be16 verb;
47} __attribute__((packed));
48
49struct hvsi_query_response {
50	struct hvsi_header hdr;
51	__be16 verb;
52	__be16 query_seqno;
53	union {
54		uint8_t  version;
55		__be32 mctrl_word;
56	} u;
57} __attribute__((packed));
58
59/* hvsi lib struct definitions */
60#define HVSI_INBUF_SIZE		255
61struct tty_struct;
62struct hvsi_priv {
63	unsigned int	inbuf_len;	/* data in input buffer */
64	unsigned char	inbuf[HVSI_INBUF_SIZE];
65	unsigned int	inbuf_cur;	/* Cursor in input buffer */
66	unsigned int	inbuf_pktlen;	/* packet lenght from cursor */
67	atomic_t	seqno;		/* packet sequence number */
68	unsigned int	opened:1;	/* driver opened */
69	unsigned int	established:1;	/* protocol established */
70	unsigned int 	is_console:1;	/* used as a kernel console device */
71	unsigned int	mctrl_update:1;	/* modem control updated */
72	unsigned short	mctrl;		/* modem control */
73	struct tty_struct *tty;		/* tty structure */
74	int (*get_chars)(uint32_t termno, char *buf, int count);
75	int (*put_chars)(uint32_t termno, const char *buf, int count);
76	uint32_t	termno;
77};
78
79/* hvsi lib functions */
80struct hvc_struct;
81extern void hvsilib_init(struct hvsi_priv *pv,
82			 int (*get_chars)(uint32_t termno, char *buf, int count),
83			 int (*put_chars)(uint32_t termno, const char *buf,
84					  int count),
85			 int termno, int is_console);
86extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
87extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
88extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
89extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
90extern void hvsilib_establish(struct hvsi_priv *pv);
91extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
92extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
93
94#endif /* _HVSI_H */
95