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 
25 struct hvsi_header {
26 	uint8_t  type;
27 	uint8_t  len;
28 	uint16_t seqno;
29 } __attribute__((packed));
30 
31 struct hvsi_data {
32 	struct hvsi_header hdr;
33 	uint8_t  data[HVSI_MAX_OUTGOING_DATA];
34 } __attribute__((packed));
35 
36 struct hvsi_control {
37 	struct hvsi_header hdr;
38 	uint16_t verb;
39 	/* optional depending on verb: */
40 	uint32_t word;
41 	uint32_t mask;
42 } __attribute__((packed));
43 
44 struct hvsi_query {
45 	struct hvsi_header hdr;
46 	uint16_t verb;
47 } __attribute__((packed));
48 
49 struct hvsi_query_response {
50 	struct hvsi_header hdr;
51 	uint16_t verb;
52 	uint16_t query_seqno;
53 	union {
54 		uint8_t  version;
55 		uint32_t mctrl_word;
56 	} u;
57 } __attribute__((packed));
58 
59 /* hvsi lib struct definitions */
60 #define HVSI_INBUF_SIZE		255
61 struct tty_struct;
62 struct 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 */
80 struct hvc_struct;
81 extern 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);
86 extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
87 extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
88 extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
89 extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
90 extern void hvsilib_establish(struct hvsi_priv *pv);
91 extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
92 extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
93 
94 #endif /* _HVSI_H */
95