isdn.h

嵌入式ARM的一些源代码

#define ISDN_ASYNC_CLOSING	  0x08000000 /* Serial port is closing       */
#define ISDN_ASYNC_CTS_FLOW	  0x04000000 /* Do CTS flow control          */
#define ISDN_ASYNC_CHECK_CD	  0x02000000 /* i.e., CLOCAL                 */
#define ISDN_ASYNC_HUP_NOTIFY         0x0001 /* Notify tty on hangups/closes */
#define ISDN_ASYNC_SESSION_LOCKOUT    0x0100 /* Lock cua opens on session    */
#define ISDN_ASYNC_PGRP_LOCKOUT       0x0200 /* Lock cua opens on pgrp       */
#define ISDN_ASYNC_CALLOUT_NOHUP      0x0400 /* No hangup for cui            */
#define ISDN_ASYNC_SPLIT_TERMIOS      0x0008 /* Sep. termios for dialin/out  */
#define ISDN_SERIAL_XMIT_SIZE           4000 /* Maximum bufsize for write    */
#define ISDN_SERIAL_TYPE_NORMAL            1
#define ISDN_SERIAL_TYPE_CALLOUT           2

#ifdef CONFIG_ISDN_AUDIO
/* For using sk_buffs with audio we need some private variables
 * within each sk_buff. For this purpose, we declare a struct here,
 * and put it always at skb->head. A few macros help accessing the
 * variables. Of course, we need to check skb_headroom prior to
 * any access.
 */
typedef struct isdn_audio_skb {
  unsigned short dle_count;
  unsigned char  lock;
} isdn_audio_skb;

#define ISDN_AUDIO_SKB_DLECOUNT(skb) (((isdn_audio_skb*)skb->head)->dle_count)
#define ISDN_AUDIO_SKB_LOCK(skb) (((isdn_audio_skb*)skb->head)->lock)
#endif

/* Private data of AT-command-interpreter */
typedef struct atemu {
  u_char              profile[ISDN_MODEM_ANZREG]; /* Modem-Regs. Profile 0 */
  u_char              mdmreg[ISDN_MODEM_ANZREG];  /* Modem-Registers       */
  char                pmsn[ISDN_MSNLEN]; /* EAZ/MSNs Profile 0             */
  char                msn[ISDN_MSNLEN];/* EAZ/MSN                          */
#ifdef CONFIG_ISDN_AUDIO
  u_char              vpar[10];        /* Voice-parameters                 */
  int                 lastDLE;         /* Flag for voice-coding: DLE seen  */
#endif
  int                 mdmcmdl;         /* Length of Modem-Commandbuffer    */
  int                 pluscount;       /* Counter for +++ sequence         */
  int                 lastplus;        /* Timestamp of last +              */
  char                mdmcmd[255];     /* Modem-Commandbuffer              */
} atemu;

/* Private data (similar to async_struct in <linux/serial.h>) */
typedef struct modem_info {
  int			magic;
  int			flags;		 /* defined in tty.h               */
  int			x_char;		 /* xon/xoff character             */
  int			mcr;		 /* Modem control register         */
  int                   msr;             /* Modem status register          */
  int                   lsr;             /* Line status register           */
  int			line;
  int			count;		 /* # of fd on device              */
  int			blocked_open;	 /* # of blocked opens             */
  long			session;	 /* Session of opening process     */
  long			pgrp;		 /* pgrp of opening process        */
  int                   online;          /* 1 = B-Channel is up, drop data */
					 /* 2 = B-Channel is up, deliver d.*/
  int                   dialing;         /* Dial in progress               */
  int                   rcvsched;        /* Receive needs schedule         */
  int                   isdn_driver;	 /* Index to isdn-driver           */
  int                   isdn_channel;    /* Index to isdn-channel          */
  int                   drv_index;       /* Index to dev->usage            */
  int                   ncarrier;        /* Flag: schedule NO CARRIER      */
  unsigned char         last_cause[8];   /* Last cause message             */
  unsigned char         last_num[ISDN_MSNLEN];
	                                 /* Last phone-number              */
  unsigned char         last_l2;         /* Last layer-2 protocol          */
  unsigned char         last_si;         /* Last service                   */
  unsigned char         last_lhup;       /* Last hangup local?             */
  unsigned char         last_dir;        /* Last direction (in or out)     */
  struct timer_list     nc_timer;        /* Timer for delayed NO CARRIER   */
  int                   send_outstanding;/* # of outstanding send-requests */
  int                   xmit_size;       /* max. # of chars in xmit_buf    */
  int                   xmit_count;      /* # of chars in xmit_buf         */
  unsigned char         *xmit_buf;       /* transmit buffer                */
  struct sk_buff_head   xmit_queue;      /* transmit queue                 */
#ifdef CONFIG_ISDN_AUDIO
  int                   vonline;         /* Voice-channel status           */
					 /* Bit 0 = recording              */
					 /* Bit 1 = playback               */
					 /* Bit 2 = playback, DLE-ETX seen */
  struct sk_buff_head   dtmf_queue;      /* queue for dtmf results         */
  void                  *adpcms;         /* state for adpcm decompression  */
  void                  *adpcmr;         /* state for adpcm compression    */
  void                  *dtmf_state;     /* state for dtmf decoder         */
#endif
  struct tty_struct 	*tty;            /* Pointer to corresponding tty   */
  atemu                 emu;             /* AT-emulator data               */
  struct termios	normal_termios;  /* For saving termios structs     */
  struct termios	callout_termios;
  struct wait_queue	*open_wait;
  struct wait_queue	*close_wait;
} modem_info;

#define ISDN_MODEM_WINSIZE 8

/* Description of one ISDN-tty */
typedef struct {
  int                refcount;			   /* Number of opens        */
  struct tty_driver  tty_modem;			   /* tty-device             */
  struct tty_driver  cua_modem;			   /* cua-device             */
  struct tty_struct  *modem_table[ISDN_MAX_CHANNELS]; /* ?? copied from Orig */
  struct termios     *modem_termios[ISDN_MAX_CHANNELS];
  struct termios     *modem_termios_locked[ISDN_MAX_CHANNELS];
  modem_info         info[ISDN_MAX_CHANNELS];	   /* Private data           */
} modem;

/*======================= End of ISDN-tty stuff ============================*/

/*======================= Start of sync-ppp stuff ==========================*/


#define NUM_RCV_BUFFS     64
#define PPP_HARD_HDR_LEN 4

#ifdef CONFIG_ISDN_PPP

struct sqqueue {
  struct sqqueue *next;
  long sqno_start;
  long sqno_end;
  struct sk_buff *skb;
  long timer;
};
  
struct mpqueue {
  struct mpqueue *next;
  struct mpqueue *last;
  long sqno;
  struct sk_buff *skb;
  int BEbyte;
  unsigned long time;
}; 

struct ippp_buf_queue {
  struct ippp_buf_queue *next;
  struct ippp_buf_queue *last;
  char *buf;                 /* NULL here indicates end of queue */
  int len;
};

struct ippp_struct {
  struct ippp_struct *next_link;
  int state;
  struct ippp_buf_queue rq[NUM_RCV_BUFFS]; /* packet queue for isdn_ppp_read() */
  struct ippp_buf_queue *first;  /* pointer to (current) first packet */
  struct ippp_buf_queue *last;   /* pointer to (current) last used packet in queue */
  struct wait_queue *wq;
  struct wait_queue *wq1;
  struct task_struct *tk;
  unsigned int mpppcfg;
  unsigned int pppcfg;
  unsigned int mru;
  unsigned int mpmru;
  unsigned int mpmtu;
  unsigned int maxcid;
  isdn_net_local *lp;
  int unit; 
  int minor;
  long last_link_seqno;
  long mp_seqno;
  long range;
#ifdef CONFIG_ISDN_PPP_VJ
  unsigned char *cbuf;
  struct slcompress *slcomp;
#endif
  unsigned long debug;
  struct isdn_ppp_compressor *compressor,*link_compressor;
  void *decomp_stat,*comp_stat,*link_decomp_stat,*link_comp_stat;
};

#endif

/*======================== End of sync-ppp stuff ===========================*/

/*======================= Start of general stuff ===========================*/

typedef struct {
  char *next;
  char *private;
} infostruct;

/* Description of hardware-level-driver */
typedef struct {
  ulong               flags;            /* Flags                            */
  int                 channels;         /* Number of channels               */
  int                 reject_bus;       /* Flag: Reject rejected call on bus*/
  struct wait_queue  *st_waitq;         /* Wait-Queue for status-read's     */
  int                 maxbufsize;       /* Maximum Buffersize supported     */
  unsigned long       pktcount;         /* Until now: unused                */
  int                 running;          /* Flag: Protocolcode running       */
  int                 loaded;           /* Flag: Driver loaded              */
  int                 stavail;          /* Chars avail on Status-device     */
  isdn_if            *interface;        /* Interface to driver              */
  int                *rcverr;           /* Error-counters for B-Ch.-receive */
  int                *rcvcount;         /* Byte-counters for B-Ch.-receive  */
#ifdef CONFIG_ISDN_AUDIO
  unsigned long      DLEflag;           /* Flags: Insert DLE at next read   */
#endif
  struct sk_buff_head *rpqueue;         /* Pointers to start of Rcv-Queue   */
  struct wait_queue  **rcv_waitq;       /* Wait-Queues for B-Channel-Reads  */
  struct wait_queue  **snd_waitq;       /* Wait-Queue for B-Channel-Send's  */
  char               msn2eaz[10][ISDN_MSNLEN];  /* Mapping-Table MSN->EAZ   */
} driver;

/* Main driver-data */
typedef struct isdn_devt {
  unsigned short    flags;		       /* Bitmapped Flags:           */
				               /*                            */
  int               drivers;		       /* Current number of drivers  */
  int               channels;		       /* Current number of channels */
  int               net_verbose;               /* Verbose-Flag               */
  int               modempoll;		       /* Flag: tty-read active      */
  int               tflags;                    /* Timer-Flags:               */
				               /*  see ISDN_TIMER_..defines  */
  int               global_flags;
  infostruct        *infochain;                /* List of open info-devs.    */
  struct wait_queue *info_waitq;               /* Wait-Queue for isdninfo    */
  struct timer_list timer;		       /* Misc.-function Timer       */
  int               chanmap[ISDN_MAX_CHANNELS];/* Map minor->device-channel  */
  int               drvmap[ISDN_MAX_CHANNELS]; /* Map minor->driver-index    */
  int               usage[ISDN_MAX_CHANNELS];  /* Used by tty/ip/voice       */
  char              num[ISDN_MAX_CHANNELS][ISDN_MSNLEN];
                                               /* Remote number of active ch.*/
  int               m_idx[ISDN_MAX_CHANNELS];  /* Index for mdm....          */
  driver            *drv[ISDN_MAX_DRIVERS];    /* Array of drivers           */
  isdn_net_dev      *netdev;		       /* Linked list of net-if's    */
  char              drvid[ISDN_MAX_DRIVERS][20];/* Driver-ID                 */
  struct task_struct *profd;                   /* For iprofd                 */
  modem             mdm;		       /* tty-driver-data            */
  isdn_net_dev      *rx_netdev[ISDN_MAX_CHANNELS]; /* rx netdev-pointers     */
  isdn_net_dev      *st_netdev[ISDN_MAX_CHANNELS]; /* stat netdev-pointers   */
  ulong             ibytes[ISDN_MAX_CHANNELS]; /* Statistics incoming bytes  */
  ulong             obytes[ISDN_MAX_CHANNELS]; /* Statistics outgoing bytes  */
} isdn_dev;

extern isdn_dev *dev;

/* Utility-Macros */
#define MIN(a,b) ((a<b)?a:b)
#define MAX(a,b) ((a>b)?a:b)

#endif /* __KERNEL__ */
#endif /* isdn_h */