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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _HVSI_H
3#define _HVSI_H
4
5#define VS_DATA_PACKET_HEADER 0xff
6#define VS_CONTROL_PACKET_HEADER 0xfe
7#define VS_QUERY_PACKET_HEADER 0xfd
8#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
9
10/* control verbs */
11#define VSV_SET_MODEM_CTL 1 /* to service processor only */
12#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
13#define VSV_CLOSE_PROTOCOL 3
14
15/* query verbs */
16#define VSV_SEND_VERSION_NUMBER 1
17#define VSV_SEND_MODEM_CTL_STATUS 2
18
19/* yes, these masks are not consecutive. */
20#define HVSI_TSDTR 0x01
21#define HVSI_TSCD 0x20
22
23#define HVSI_MAX_OUTGOING_DATA 12
24#define HVSI_VERSION 1
25
26struct hvsi_header {
27 uint8_t type;
28 uint8_t len;
29 __be16 seqno;
30} __attribute__((packed));
31
32struct hvsi_data {
33 struct hvsi_header hdr;
34 uint8_t data[HVSI_MAX_OUTGOING_DATA];
35} __attribute__((packed));
36
37struct hvsi_control {
38 struct hvsi_header hdr;
39 __be16 verb;
40 /* optional depending on verb: */
41 __be32 word;
42 __be32 mask;
43} __attribute__((packed));
44
45struct hvsi_query {
46 struct hvsi_header hdr;
47 __be16 verb;
48} __attribute__((packed));
49
50struct hvsi_query_response {
51 struct hvsi_header hdr;
52 __be16 verb;
53 __be16 query_seqno;
54 union {
55 uint8_t version;
56 __be32 mctrl_word;
57 } u;
58} __attribute__((packed));
59
60/* hvsi lib struct definitions */
61#define HVSI_INBUF_SIZE 255
62struct tty_struct;
63struct hvsi_priv {
64 unsigned int inbuf_len; /* data in input buffer */
65 unsigned char inbuf[HVSI_INBUF_SIZE];
66 unsigned int inbuf_cur; /* Cursor in input buffer */
67 size_t inbuf_pktlen; /* packet length from cursor */
68 atomic_t seqno; /* packet sequence number */
69 unsigned int opened:1; /* driver opened */
70 unsigned int established:1; /* protocol established */
71 unsigned int is_console:1; /* used as a kernel console device */
72 unsigned int mctrl_update:1; /* modem control updated */
73 unsigned short mctrl; /* modem control */
74 struct tty_struct *tty; /* tty structure */
75 ssize_t (*get_chars)(uint32_t termno, u8 *buf, size_t count);
76 ssize_t (*put_chars)(uint32_t termno, const u8 *buf, size_t count);
77 uint32_t termno;
78};
79
80/* hvsi lib functions */
81struct hvc_struct;
82extern void hvsilib_init(struct hvsi_priv *pv,
83 ssize_t (*get_chars)(uint32_t termno, u8 *buf,
84 size_t count),
85 ssize_t (*put_chars)(uint32_t termno, const u8 *buf,
86 size_t count),
87 int termno, int is_console);
88extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
89extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
90extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
91extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
92extern void hvsilib_establish(struct hvsi_priv *pv);
93extern ssize_t hvsilib_get_chars(struct hvsi_priv *pv, u8 *buf, size_t count);
94extern ssize_t hvsilib_put_chars(struct hvsi_priv *pv, const u8 *buf,
95 size_t count);
96
97#endif /* _HVSI_H */
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 */