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#ifndef _HVSI_H
#define _HVSI_H
#define VS_DATA_PACKET_HEADER 0xff
#define VS_CONTROL_PACKET_HEADER 0xfe
#define VS_QUERY_PACKET_HEADER 0xfd
#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
/* control verbs */
#define VSV_SET_MODEM_CTL 1 /* to service processor only */
#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
#define VSV_CLOSE_PROTOCOL 3
/* query verbs */
#define VSV_SEND_VERSION_NUMBER 1
#define VSV_SEND_MODEM_CTL_STATUS 2
/* yes, these masks are not consecutive. */
#define HVSI_TSDTR 0x01
#define HVSI_TSCD 0x20
#define HVSI_MAX_OUTGOING_DATA 12
#define HVSI_VERSION 1
struct hvsi_header {
uint8_t type;
uint8_t len;
__be16 seqno;
} __attribute__((packed));
struct hvsi_data {
struct hvsi_header hdr;
uint8_t data[HVSI_MAX_OUTGOING_DATA];
} __attribute__((packed));
struct hvsi_control {
struct hvsi_header hdr;
__be16 verb;
/* optional depending on verb: */
__be32 word;
__be32 mask;
} __attribute__((packed));
struct hvsi_query {
struct hvsi_header hdr;
__be16 verb;
} __attribute__((packed));
struct hvsi_query_response {
struct hvsi_header hdr;
__be16 verb;
__be16 query_seqno;
union {
uint8_t version;
__be32 mctrl_word;
} u;
} __attribute__((packed));
/* hvsi lib struct definitions */
#define HVSI_INBUF_SIZE 255
struct tty_struct;
struct hvsi_priv {
unsigned int inbuf_len; /* data in input buffer */
unsigned char inbuf[HVSI_INBUF_SIZE];
unsigned int inbuf_cur; /* Cursor in input buffer */
unsigned int inbuf_pktlen; /* packet lenght from cursor */
atomic_t seqno; /* packet sequence number */
unsigned int opened:1; /* driver opened */
unsigned int established:1; /* protocol established */
unsigned int is_console:1; /* used as a kernel console device */
unsigned int mctrl_update:1; /* modem control updated */
unsigned short mctrl; /* modem control */
struct tty_struct *tty; /* tty structure */
int (*get_chars)(uint32_t termno, char *buf, int count);
int (*put_chars)(uint32_t termno, const char *buf, int count);
uint32_t termno;
};
/* hvsi lib functions */
struct hvc_struct;
extern void hvsilib_init(struct hvsi_priv *pv,
int (*get_chars)(uint32_t termno, char *buf, int count),
int (*put_chars)(uint32_t termno, const char *buf,
int count),
int termno, int is_console);
extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
extern void hvsilib_establish(struct hvsi_priv *pv);
extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
#endif /* _HVSI_H */