| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | |
| 26 | struct hvsi_header { |
| 27 | uint8_t type; |
| 28 | uint8_t len; |
| 29 | __be16 seqno; |
| 30 | } __attribute__((packed)); |
| 31 | |
| 32 | struct hvsi_data { |
| 33 | struct hvsi_header hdr; |
| 34 | uint8_t data[HVSI_MAX_OUTGOING_DATA]; |
| 35 | } __attribute__((packed)); |
| 36 | |
| 37 | struct 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 | |
| 45 | struct hvsi_query { |
| 46 | struct hvsi_header hdr; |
| 47 | __be16 verb; |
| 48 | } __attribute__((packed)); |
| 49 | |
| 50 | struct 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 |
| 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; |
| 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); |
| 94 | |
| 95 | #endif /* _HVSI_H */ |