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
  25 struct hvsi_header {
  26         uint8_t  type;
  27         uint8_t  len;
  28         __be16 seqno;
  29 } __attribute__((packed));
  30
  31 struct hvsi_data {
  32         struct hvsi_header hdr;
  33         uint8_t  data[HVSI_MAX_OUTGOING_DATA];
  34 } __attribute__((packed));
  35
  36 struct 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
  44 struct hvsi_query {
  45         struct hvsi_header hdr;
  46         __be16 verb;
  47 } __attribute__((packed));
  48
  49 struct 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
  61 struct tty_struct;
  62 struct 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 */
  80 struct hvc_struct;
  81 extern 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);
  86 extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
  87 extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
  88 extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
  89 extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
  90 extern void hvsilib_establish(struct hvsi_priv *pv);
  91 extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
  92 extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
  93
  94 #endif /* _HVSI_H */