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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
725e789f BH |
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 | ||
26 | struct hvsi_header { | |
27 | uint8_t type; | |
28 | uint8_t len; | |
99fc1d91 | 29 | __be16 seqno; |
725e789f BH |
30 | } __attribute__((packed)); |
31 | ||
32 | struct hvsi_data { | |
048bee77 | 33 | struct hvsi_header hdr; |
725e789f BH |
34 | uint8_t data[HVSI_MAX_OUTGOING_DATA]; |
35 | } __attribute__((packed)); | |
36 | ||
37 | struct hvsi_control { | |
048bee77 | 38 | struct hvsi_header hdr; |
99fc1d91 | 39 | __be16 verb; |
725e789f | 40 | /* optional depending on verb: */ |
99fc1d91 BH |
41 | __be32 word; |
42 | __be32 mask; | |
725e789f BH |
43 | } __attribute__((packed)); |
44 | ||
45 | struct hvsi_query { | |
048bee77 | 46 | struct hvsi_header hdr; |
99fc1d91 | 47 | __be16 verb; |
725e789f BH |
48 | } __attribute__((packed)); |
49 | ||
50 | struct hvsi_query_response { | |
048bee77 | 51 | struct hvsi_header hdr; |
99fc1d91 BH |
52 | __be16 verb; |
53 | __be16 query_seqno; | |
725e789f BH |
54 | union { |
55 | uint8_t version; | |
99fc1d91 | 56 | __be32 mctrl_word; |
725e789f BH |
57 | } u; |
58 | } __attribute__((packed)); | |
59 | ||
17bdc6c0 BH |
60 | /* hvsi lib struct definitions */ |
61 | #define HVSI_INBUF_SIZE 255 | |
62 | struct tty_struct; | |
63 | struct 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 | unsigned int inbuf_pktlen; /* packet lenght 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 | int (*get_chars)(uint32_t termno, char *buf, int count); | |
76 | int (*put_chars)(uint32_t termno, const char *buf, int count); | |
77 | uint32_t termno; | |
78 | }; | |
79 | ||
80 | /* hvsi lib functions */ | |
81 | struct hvc_struct; | |
87fa35dd BH |
82 | extern void hvsilib_init(struct hvsi_priv *pv, |
83 | int (*get_chars)(uint32_t termno, char *buf, int count), | |
84 | int (*put_chars)(uint32_t termno, const char *buf, | |
85 | int count), | |
86 | int termno, int is_console); | |
87 | extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp); | |
88 | extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp); | |
89 | extern int hvsilib_read_mctrl(struct hvsi_priv *pv); | |
90 | extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr); | |
91 | extern void hvsilib_establish(struct hvsi_priv *pv); | |
92 | extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count); | |
93 | extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count); | |
725e789f BH |
94 | |
95 | #endif /* _HVSI_H */ |