LXR linux/arch/powerpc/include/asm/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 */
  95