linux/drivers/isdn/gigaset/gigaset.h
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   1/*
   2 * Siemens Gigaset 307x driver
   3 * Common header file for all connection variants
   4 *
   5 * Written by Stefan Eilers
   6 *        and Hansjoerg Lipp <hjlipp@web.de>
   7 *
   8 * =====================================================================
   9 *      This program is free software; you can redistribute it and/or
  10 *      modify it under the terms of the GNU General Public License as
  11 *      published by the Free Software Foundation; either version 2 of
  12 *      the License, or (at your option) any later version.
  13 * =====================================================================
  14 */
  15
  16#ifndef GIGASET_H
  17#define GIGASET_H
  18
  19/* define global prefix for pr_ macros in linux/kernel.h */
  20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22#include <linux/kernel.h>
  23#include <linux/sched.h>
  24#include <linux/compiler.h>
  25#include <linux/types.h>
  26#include <linux/ctype.h>
  27#include <linux/slab.h>
  28#include <linux/spinlock.h>
  29#include <linux/skbuff.h>
  30#include <linux/netdevice.h>
  31#include <linux/ppp_defs.h>
  32#include <linux/timer.h>
  33#include <linux/interrupt.h>
  34#include <linux/tty.h>
  35#include <linux/tty_driver.h>
  36#include <linux/list.h>
  37#include <asm/atomic.h>
  38
  39#define GIG_VERSION {0, 5, 0, 0}
  40#define GIG_COMPAT  {0, 4, 0, 0}
  41
  42#define MAX_REC_PARAMS 10       /* Max. number of params in response string */
  43#define MAX_RESP_SIZE 511       /* Max. size of a response string */
  44
  45#define MAX_EVENTS 64           /* size of event queue */
  46
  47#define RBUFSIZE 8192
  48
  49/* compile time options */
  50#define GIG_MAJOR 0
  51
  52#define GIG_MAYINITONDIAL
  53#define GIG_RETRYCID
  54#define GIG_X75
  55
  56#define GIG_TICK 100            /* in milliseconds */
  57
  58/* timeout values (unit: 1 sec) */
  59#define INIT_TIMEOUT 1
  60
  61/* timeout values (unit: 0.1 sec) */
  62#define RING_TIMEOUT 3          /* for additional parameters to RING */
  63#define BAS_TIMEOUT 20          /* for response to Base USB ops */
  64#define ATRDY_TIMEOUT 3         /* for HD_READY_SEND_ATDATA */
  65
  66#define BAS_RETRY 3             /* max. retries for base USB ops */
  67
  68#define MAXACT 3
  69
  70extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
  71
  72/* debug flags, combine by adding/bitwise OR */
  73enum debuglevel {
  74        DEBUG_INTR        = 0x00008, /* interrupt processing */
  75        DEBUG_CMD         = 0x00020, /* sent/received LL commands */
  76        DEBUG_STREAM      = 0x00040, /* application data stream I/O events */
  77        DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
  78        DEBUG_LLDATA      = 0x00100, /* sent/received LL data */
  79        DEBUG_EVENT       = 0x00200, /* event processing */
  80        DEBUG_DRIVER      = 0x00400, /* driver structure */
  81        DEBUG_HDLC        = 0x00800, /* M10x HDLC processing */
  82        DEBUG_CHANNEL     = 0x01000, /* channel allocation/deallocation */
  83        DEBUG_TRANSCMD    = 0x02000, /* AT-COMMANDS+RESPONSES */
  84        DEBUG_MCMD        = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
  85        DEBUG_INIT        = 0x08000, /* (de)allocation+initialization of data
  86                                        structures */
  87        DEBUG_SUSPEND     = 0x10000, /* suspend/resume processing */
  88        DEBUG_OUTPUT      = 0x20000, /* output to device */
  89        DEBUG_ISO         = 0x40000, /* isochronous transfers */
  90        DEBUG_IF          = 0x80000, /* character device operations */
  91        DEBUG_USBREQ      = 0x100000, /* USB communication (except payload
  92                                         data) */
  93        DEBUG_LOCKCMD     = 0x200000, /* AT commands and responses when
  94                                         MS_LOCKED */
  95
  96        DEBUG_ANY         = 0x3fffff, /* print message if any of the others is
  97                                         activated */
  98};
  99
 100#ifdef CONFIG_GIGASET_DEBUG
 101
 102#define gig_dbg(level, format, arg...) \
 103        do { \
 104                if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 105                        printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
 106                               ## arg); \
 107        } while (0)
 108#define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 109
 110#else
 111
 112#define gig_dbg(level, format, arg...) do {} while (0)
 113#define DEBUG_DEFAULT 0
 114
 115#endif
 116
 117void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 118                        size_t len, const unsigned char *buf);
 119
 120/* connection state */
 121#define ZSAU_NONE                       0
 122#define ZSAU_DISCONNECT_IND             4
 123#define ZSAU_OUTGOING_CALL_PROCEEDING   1
 124#define ZSAU_PROCEEDING                 1
 125#define ZSAU_CALL_DELIVERED             2
 126#define ZSAU_ACTIVE                     3
 127#define ZSAU_NULL                       5
 128#define ZSAU_DISCONNECT_REQ             6
 129#define ZSAU_UNKNOWN                    -1
 130
 131/* USB control transfer requests */
 132#define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 133#define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 134
 135/* interrupt pipe messages */
 136#define HD_B1_FLOW_CONTROL              0x80
 137#define HD_B2_FLOW_CONTROL              0x81
 138#define HD_RECEIVEATDATA_ACK            (0x35)          /* 3070 */
 139#define HD_READY_SEND_ATDATA            (0x36)          /* 3070 */
 140#define HD_OPEN_ATCHANNEL_ACK           (0x37)          /* 3070 */
 141#define HD_CLOSE_ATCHANNEL_ACK          (0x38)          /* 3070 */
 142#define HD_DEVICE_INIT_OK               (0x11)          /* ISurf USB + 3070 */
 143#define HD_OPEN_B1CHANNEL_ACK           (0x51)          /* ISurf USB + 3070 */
 144#define HD_OPEN_B2CHANNEL_ACK           (0x52)          /* ISurf USB + 3070 */
 145#define HD_CLOSE_B1CHANNEL_ACK          (0x53)          /* ISurf USB + 3070 */
 146#define HD_CLOSE_B2CHANNEL_ACK          (0x54)          /* ISurf USB + 3070 */
 147#define HD_SUSPEND_END                  (0x61)          /* ISurf USB */
 148#define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          /* ISurf USB + 3070 */
 149
 150/* control requests */
 151#define HD_OPEN_B1CHANNEL               (0x23)          /* ISurf USB + 3070 */
 152#define HD_CLOSE_B1CHANNEL              (0x24)          /* ISurf USB + 3070 */
 153#define HD_OPEN_B2CHANNEL               (0x25)          /* ISurf USB + 3070 */
 154#define HD_CLOSE_B2CHANNEL              (0x26)          /* ISurf USB + 3070 */
 155#define HD_RESET_INTERRUPT_PIPE         (0x27)          /* ISurf USB + 3070 */
 156#define HD_DEVICE_INIT_ACK              (0x34)          /* ISurf USB + 3070 */
 157#define HD_WRITE_ATMESSAGE              (0x12)          /* 3070 */
 158#define HD_READ_ATMESSAGE               (0x13)          /* 3070 */
 159#define HD_OPEN_ATCHANNEL               (0x28)          /* 3070 */
 160#define HD_CLOSE_ATCHANNEL              (0x29)          /* 3070 */
 161
 162/* number of B channels supported by base driver */
 163#define BAS_CHANNELS    2
 164
 165/* USB frames for isochronous transfer */
 166#define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 167#define BAS_NUMFRAMES   8       /* number of frames per URB */
 168#define BAS_MAXFRAME    16      /* allocated bytes per frame */
 169#define BAS_NORMFRAME   8       /* send size without flow control */
 170#define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 171#define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 172#define BAS_CORRFRAMES  4       /* flow control multiplicator */
 173
 174#define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 175                                        /* size of isoc in buf per URB */
 176#define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 177#define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 178
 179#define BAS_INURBS      3
 180#define BAS_OUTURBS     3
 181
 182/* variable commands in struct bc_state */
 183#define AT_ISO          0
 184#define AT_DIAL         1
 185#define AT_MSN          2
 186#define AT_BC           3
 187#define AT_PROTO        4
 188#define AT_TYPE         5
 189#define AT_CLIP         6
 190/* total number */
 191#define AT_NUM          7
 192
 193/* variables in struct at_state_t */
 194#define VAR_ZSAU        0
 195#define VAR_ZDLE        1
 196#define VAR_ZVLS        2
 197#define VAR_ZCTP        3
 198#define VAR_NUM         4
 199
 200#define STR_NMBR        0
 201#define STR_ZCPN        1
 202#define STR_ZCON        2
 203#define STR_ZBC         3
 204#define STR_ZHLC        4
 205#define STR_NUM         5
 206
 207#define EV_TIMEOUT      -105
 208#define EV_IF_VER       -106
 209#define EV_PROC_CIDMODE -107
 210#define EV_SHUTDOWN     -108
 211#define EV_START        -110
 212#define EV_STOP         -111
 213#define EV_IF_LOCK      -112
 214#define EV_ACCEPT       -114
 215#define EV_DIAL         -115
 216#define EV_HUP          -116
 217#define EV_BC_OPEN      -117
 218#define EV_BC_CLOSED    -118
 219
 220/* input state */
 221#define INS_command     0x0001  /* receiving messages (not payload data) */
 222#define INS_DLE_char    0x0002  /* DLE flag received (in DLE mode) */
 223#define INS_byte_stuff  0x0004
 224#define INS_have_data   0x0008
 225#define INS_DLE_command 0x0020  /* DLE message start (<DLE> X) received */
 226#define INS_flag_hunt   0x0040
 227
 228/* channel state */
 229#define CHS_D_UP        0x01
 230#define CHS_B_UP        0x02
 231#define CHS_NOTIFY_LL   0x04
 232
 233#define ICALL_REJECT    0
 234#define ICALL_ACCEPT    1
 235#define ICALL_IGNORE    2
 236
 237/* device state */
 238#define MS_UNINITIALIZED        0
 239#define MS_INIT                 1
 240#define MS_LOCKED               2
 241#define MS_SHUTDOWN             3
 242#define MS_RECOVER              4
 243#define MS_READY                5
 244
 245/* mode */
 246#define M_UNKNOWN       0
 247#define M_CONFIG        1
 248#define M_UNIMODEM      2
 249#define M_CID           3
 250
 251/* start mode */
 252#define SM_LOCKED       0
 253#define SM_ISDN         1 /* default */
 254
 255/* layer 2 protocols (AT^SBPR=...) */
 256#define L2_BITSYNC      0
 257#define L2_HDLC         1
 258#define L2_VOICE        2
 259
 260struct gigaset_ops;
 261struct gigaset_driver;
 262
 263struct usb_cardstate;
 264struct ser_cardstate;
 265struct bas_cardstate;
 266
 267struct bc_state;
 268struct usb_bc_state;
 269struct ser_bc_state;
 270struct bas_bc_state;
 271
 272struct reply_t {
 273        int     resp_code;      /* RSP_XXXX */
 274        int     min_ConState;   /* <0 => ignore */
 275        int     max_ConState;   /* <0 => ignore */
 276        int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 277        int     new_ConState;   /* <0 => ignore */
 278        int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 279        int     action[MAXACT]; /* ACT_XXXX */
 280        char    *command;       /* NULL==none */
 281};
 282
 283extern struct reply_t gigaset_tab_cid[];
 284extern struct reply_t gigaset_tab_nocid[];
 285
 286struct inbuf_t {
 287        struct cardstate        *cs;
 288        int                     inputstate;
 289        int                     head, tail;
 290        unsigned char           data[RBUFSIZE];
 291};
 292
 293/* isochronous write buffer structure
 294 * circular buffer with pad area for extraction of complete USB frames
 295 * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 296 * - data[nextread..write-1] is valid data yet to be sent
 297 * - data[write] is the next byte to write to
 298 *   - in byte-oriented L2 procotols, it is completely free
 299 *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 300 * - data[write+1..read-1] is free
 301 * - wbits is the number of valid data bits in data[write], starting at the LSB
 302 * - writesem is the semaphore for writing to the buffer:
 303 *   if writesem <= 0, data[write..read-1] is currently being written to
 304 * - idle contains the byte value to repeat when the end of valid data is
 305 *   reached; if nextread==write (buffer contains no data to send), either the
 306 *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 307 *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 308 *   are also filled with that value
 309 */
 310struct isowbuf_t {
 311        int             read;
 312        int             nextread;
 313        int             write;
 314        atomic_t        writesem;
 315        int             wbits;
 316        unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 317        unsigned char   idle;
 318};
 319
 320/* isochronous write URB context structure
 321 * data to be stored along with the URB and retrieved when it is returned
 322 * as completed by the USB subsystem
 323 * - urb: pointer to the URB itself
 324 * - bcs: pointer to the B Channel control structure
 325 * - limit: end of write buffer area covered by this URB
 326 * - status: URB completion status
 327 */
 328struct isow_urbctx_t {
 329        struct urb *urb;
 330        struct bc_state *bcs;
 331        int limit;
 332        int status;
 333};
 334
 335/* AT state structure
 336 * data associated with the state of an ISDN connection, whether or not
 337 * it is currently assigned a B channel
 338 */
 339struct at_state_t {
 340        struct list_head        list;
 341        int                     waiting;
 342        int                     getstring;
 343        unsigned                timer_index;
 344        unsigned long           timer_expires;
 345        int                     timer_active;
 346        unsigned int            ConState;       /* State of connection */
 347        struct reply_t          *replystruct;
 348        int                     cid;
 349        int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 350        char                    *str_var[STR_NUM];      /* see STR_XXXX */
 351        unsigned                pending_commands;       /* see PC_XXXX */
 352        unsigned                seq_index;
 353
 354        struct cardstate        *cs;
 355        struct bc_state         *bcs;
 356};
 357
 358struct event_t {
 359        int type;
 360        void *ptr, *arg;
 361        int parameter;
 362        int cid;
 363        struct at_state_t *at_state;
 364};
 365
 366/* This buffer holds all information about the used B-Channel */
 367struct bc_state {
 368        struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 369        struct sk_buff_head squeue;     /* B-Channel send Queue */
 370
 371        /* Variables for debugging .. */
 372        int corrupted;                  /* Counter for corrupted packages */
 373        int trans_down;                 /* Counter of packages (downstream) */
 374        int trans_up;                   /* Counter of packages (upstream) */
 375
 376        struct at_state_t at_state;
 377
 378        /* receive buffer */
 379        unsigned rx_bufsize;            /* max size accepted by application */
 380        struct sk_buff *rx_skb;
 381        __u16 rx_fcs;
 382        int inputstate;                 /* see INS_XXXX */
 383
 384        int channel;
 385
 386        struct cardstate *cs;
 387
 388        unsigned chstate;               /* bitmap (CHS_*) */
 389        int ignore;
 390        unsigned proto2;                /* layer 2 protocol (L2_*) */
 391        char *commands[AT_NUM];         /* see AT_XXXX */
 392
 393#ifdef CONFIG_GIGASET_DEBUG
 394        int emptycount;
 395#endif
 396        int busy;
 397        int use_count;
 398
 399        /* private data of hardware drivers */
 400        union {
 401                struct ser_bc_state *ser;       /* serial hardware driver */
 402                struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 403                struct bas_bc_state *bas;       /* usb hardware driver (base) */
 404        } hw;
 405
 406        void *ap;                       /* associated LL application */
 407        int apconnstate;                /* LL application connection state */
 408        spinlock_t aplock;
 409};
 410
 411struct cardstate {
 412        struct gigaset_driver *driver;
 413        unsigned minor_index;
 414        struct device *dev;
 415        struct device *tty_dev;
 416        unsigned flags;
 417
 418        const struct gigaset_ops *ops;
 419
 420        /* Stuff to handle communication */
 421        wait_queue_head_t waitqueue;
 422        int waiting;
 423        int mode;                       /* see M_XXXX */
 424        int mstate;                     /* Modem state: see MS_XXXX */
 425                                        /* only changed by the event layer */
 426        int cmd_result;
 427
 428        int channels;
 429        struct bc_state *bcs;           /* Array of struct bc_state */
 430
 431        int onechannel;                 /* data and commands transmitted in one
 432                                           stream (M10x) */
 433
 434        spinlock_t lock;
 435        struct at_state_t at_state;     /* at_state_t for cid == 0 */
 436        struct list_head temp_at_states;/* list of temporary "struct
 437                                           at_state_t"s without B channel */
 438
 439        struct inbuf_t *inbuf;
 440
 441        struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 442        spinlock_t cmdlock;
 443        unsigned curlen, cmdbytes;
 444
 445        unsigned open_count;
 446        struct tty_struct *tty;
 447        struct tasklet_struct if_wake_tasklet;
 448        unsigned control_state;
 449
 450        unsigned fwver[4];
 451        int gotfwver;
 452
 453        unsigned running;               /* !=0 if events are handled */
 454        unsigned connected;             /* !=0 if hardware is connected */
 455        unsigned isdn_up;               /* !=0 after gigaset_isdn_start() */
 456
 457        unsigned cidmode;
 458
 459        int myid;                       /* id for communication with LL */
 460        void *iif;                      /* LL interface structure */
 461        unsigned short hw_hdr_len;      /* headroom needed in data skbs */
 462
 463        struct reply_t *tabnocid;
 464        struct reply_t *tabcid;
 465        int cs_init;
 466        int ignoreframes;               /* frames to ignore after setting up the
 467                                           B channel */
 468        struct mutex mutex;             /* locks this structure:
 469                                         *   connected is not changed,
 470                                         *   hardware_up is not changed,
 471                                         *   MState is not changed to or from
 472                                         *   MS_LOCKED */
 473
 474        struct timer_list timer;
 475        int retry_count;
 476        int dle;                        /* !=0 if DLE mode is active
 477                                           (ZDLE=1 received -- M10x only) */
 478        int cur_at_seq;                 /* sequence of AT commands being
 479                                           processed */
 480        int curchannel;                 /* channel those commands are meant
 481                                           for */
 482        int commands_pending;           /* flag(s) in xxx.commands_pending have
 483                                           been set */
 484        struct tasklet_struct event_tasklet;
 485                                        /* tasklet for serializing AT commands.
 486                                         * Scheduled
 487                                         *   -> for modem reponses (and
 488                                         *      incoming data for M10x)
 489                                         *   -> on timeout
 490                                         *   -> after setting bits in
 491                                         *      xxx.at_state.pending_command
 492                                         *      (e.g. command from LL) */
 493        struct tasklet_struct write_tasklet;
 494                                        /* tasklet for serial output
 495                                         * (not used in base driver) */
 496
 497        /* event queue */
 498        struct event_t events[MAX_EVENTS];
 499        unsigned ev_tail, ev_head;
 500        spinlock_t ev_lock;
 501
 502        /* current modem response */
 503        unsigned char respdata[MAX_RESP_SIZE+1];
 504        unsigned cbytes;
 505
 506        /* private data of hardware drivers */
 507        union {
 508                struct usb_cardstate *usb; /* USB hardware driver (m105) */
 509                struct ser_cardstate *ser; /* serial hardware driver */
 510                struct bas_cardstate *bas; /* USB hardware driver (base) */
 511        } hw;
 512};
 513
 514struct gigaset_driver {
 515        struct list_head list;
 516        spinlock_t lock;                /* locks minor tables and blocked */
 517        struct tty_driver *tty;
 518        unsigned have_tty;
 519        unsigned minor;
 520        unsigned minors;
 521        struct cardstate *cs;
 522        int blocked;
 523
 524        const struct gigaset_ops *ops;
 525        struct module *owner;
 526};
 527
 528struct cmdbuf_t {
 529        struct cmdbuf_t *next, *prev;
 530        int len, offset;
 531        struct tasklet_struct *wake_tasklet;
 532        unsigned char buf[0];
 533};
 534
 535struct bas_bc_state {
 536        /* isochronous output state */
 537        int             running;
 538        atomic_t        corrbytes;
 539        spinlock_t      isooutlock;
 540        struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 541        struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 542        struct isowbuf_t        *isooutbuf;
 543        unsigned numsub;                /* submitted URB counter
 544                                           (for diagnostic messages only) */
 545        struct tasklet_struct   sent_tasklet;
 546
 547        /* isochronous input state */
 548        spinlock_t isoinlock;
 549        struct urb *isoinurbs[BAS_INURBS];
 550        unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 551        struct urb *isoindone;          /* completed isoc read URB */
 552        int isoinstatus;                /* status of completed URB */
 553        int loststatus;                 /* status of dropped URB */
 554        unsigned isoinlost;             /* number of bytes lost */
 555        /* state of bit unstuffing algorithm
 556           (in addition to BC_state.inputstate) */
 557        unsigned seqlen;                /* number of '1' bits not yet
 558                                           unstuffed */
 559        unsigned inbyte, inbits;        /* collected bits for next byte */
 560        /* statistics */
 561        unsigned goodbytes;             /* bytes correctly received */
 562        unsigned alignerrs;             /* frames with incomplete byte at end */
 563        unsigned fcserrs;               /* FCS errors */
 564        unsigned frameerrs;             /* framing errors */
 565        unsigned giants;                /* long frames */
 566        unsigned runts;                 /* short frames */
 567        unsigned aborts;                /* HDLC aborts */
 568        unsigned shared0s;              /* '0' bits shared between flags */
 569        unsigned stolen0s;              /* '0' stuff bits also serving as
 570                                           leading flag bits */
 571        struct tasklet_struct rcvd_tasklet;
 572};
 573
 574struct gigaset_ops {
 575        /* Called from ev-layer.c/interface.c for sending AT commands to the
 576           device */
 577        int (*write_cmd)(struct cardstate *cs,
 578                         const unsigned char *buf, int len,
 579                         struct tasklet_struct *wake_tasklet);
 580
 581        /* Called from interface.c for additional device control */
 582        int (*write_room)(struct cardstate *cs);
 583        int (*chars_in_buffer)(struct cardstate *cs);
 584        int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 585
 586        /* Called from ev-layer.c after setting up connection
 587         * Should call gigaset_bchannel_up(), when finished. */
 588        int (*init_bchannel)(struct bc_state *bcs);
 589
 590        /* Called from ev-layer.c after hanging up
 591         * Should call gigaset_bchannel_down(), when finished. */
 592        int (*close_bchannel)(struct bc_state *bcs);
 593
 594        /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 595        int (*initbcshw)(struct bc_state *bcs);
 596
 597        /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 598        int (*freebcshw)(struct bc_state *bcs);
 599
 600        /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
 601        void (*reinitbcshw)(struct bc_state *bcs);
 602
 603        /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 604        int (*initcshw)(struct cardstate *cs);
 605
 606        /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 607        void (*freecshw)(struct cardstate *cs);
 608
 609        /* Called from common.c/interface.c for additional serial port
 610           control */
 611        int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 612                              unsigned new_state);
 613        int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 614        int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 615
 616        /* Called from LL interface to put an skb into the send-queue.
 617         * After sending is completed, gigaset_skb_sent() must be called
 618         * with the skb's link layer header preserved. */
 619        int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 620
 621        /* Called from ev-layer.c to process a block of data
 622         * received through the common/control channel. */
 623        void (*handle_input)(struct inbuf_t *inbuf);
 624
 625};
 626
 627/* = Common structures and definitions =======================================
 628 */
 629
 630/* Parser states for DLE-Event:
 631 * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 632 * <DLE_FLAG>:  0x10
 633 * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 634 */
 635#define DLE_FLAG        0x10
 636
 637/* ===========================================================================
 638 *  Functions implemented in asyncdata.c
 639 */
 640
 641/* Called from LL interface to put an skb into the send queue. */
 642int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 643
 644/* Called from ev-layer.c to process a block of data
 645 * received through the common/control channel. */
 646void gigaset_m10x_input(struct inbuf_t *inbuf);
 647
 648/* ===========================================================================
 649 *  Functions implemented in isocdata.c
 650 */
 651
 652/* Called from LL interface to put an skb into the send queue. */
 653int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 654
 655/* Called from ev-layer.c to process a block of data
 656 * received through the common/control channel. */
 657void gigaset_isoc_input(struct inbuf_t *inbuf);
 658
 659/* Called from bas-gigaset.c to process a block of data
 660 * received through the isochronous channel */
 661void gigaset_isoc_receive(unsigned char *src, unsigned count,
 662                          struct bc_state *bcs);
 663
 664/* Called from bas-gigaset.c to put a block of data
 665 * into the isochronous output buffer */
 666int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 667
 668/* Called from bas-gigaset.c to initialize the isochronous output buffer */
 669void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 670
 671/* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 672int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 673
 674/* ===========================================================================
 675 *  Functions implemented in LL interface
 676 */
 677
 678/* Called from common.c for setting up/shutting down with the ISDN subsystem */
 679void gigaset_isdn_regdrv(void);
 680void gigaset_isdn_unregdrv(void);
 681int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
 682void gigaset_isdn_unregdev(struct cardstate *cs);
 683
 684/* Called from hardware module to indicate completion of an skb */
 685void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 686void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
 687void gigaset_isdn_rcv_err(struct bc_state *bcs);
 688
 689/* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 690void gigaset_isdn_start(struct cardstate *cs);
 691void gigaset_isdn_stop(struct cardstate *cs);
 692int gigaset_isdn_icall(struct at_state_t *at_state);
 693void gigaset_isdn_connD(struct bc_state *bcs);
 694void gigaset_isdn_hupD(struct bc_state *bcs);
 695void gigaset_isdn_connB(struct bc_state *bcs);
 696void gigaset_isdn_hupB(struct bc_state *bcs);
 697
 698/* ===========================================================================
 699 *  Functions implemented in ev-layer.c
 700 */
 701
 702/* tasklet called from common.c to process queued events */
 703void gigaset_handle_event(unsigned long data);
 704
 705/* called from isocdata.c / asyncdata.c
 706 * when a complete modem response line has been received */
 707void gigaset_handle_modem_response(struct cardstate *cs);
 708
 709/* ===========================================================================
 710 *  Functions implemented in proc.c
 711 */
 712
 713/* initialize sysfs for device */
 714void gigaset_init_dev_sysfs(struct cardstate *cs);
 715void gigaset_free_dev_sysfs(struct cardstate *cs);
 716
 717/* ===========================================================================
 718 *  Functions implemented in common.c/gigaset.h
 719 */
 720
 721void gigaset_bcs_reinit(struct bc_state *bcs);
 722void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 723                     struct cardstate *cs, int cid);
 724int gigaset_get_channel(struct bc_state *bcs);
 725struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
 726void gigaset_free_channel(struct bc_state *bcs);
 727int gigaset_get_channels(struct cardstate *cs);
 728void gigaset_free_channels(struct cardstate *cs);
 729void gigaset_block_channels(struct cardstate *cs);
 730
 731/* Allocate and initialize driver structure. */
 732struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 733                                          const char *procname,
 734                                          const char *devname,
 735                                          const struct gigaset_ops *ops,
 736                                          struct module *owner);
 737
 738/* Deallocate driver structure. */
 739void gigaset_freedriver(struct gigaset_driver *drv);
 740void gigaset_debugdrivers(void);
 741struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 742struct cardstate *gigaset_get_cs_by_id(int id);
 743void gigaset_blockdriver(struct gigaset_driver *drv);
 744
 745/* Allocate and initialize card state. Calls hardware dependent
 746   gigaset_init[b]cs(). */
 747struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 748                                 int onechannel, int ignoreframes,
 749                                 int cidmode, const char *modulename);
 750
 751/* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 752void gigaset_freecs(struct cardstate *cs);
 753
 754/* Tell common.c that hardware and driver are ready. */
 755int gigaset_start(struct cardstate *cs);
 756
 757/* Tell common.c that the device is not present any more. */
 758void gigaset_stop(struct cardstate *cs);
 759
 760/* Tell common.c that the driver is being unloaded. */
 761int gigaset_shutdown(struct cardstate *cs);
 762
 763/* Tell common.c that an skb has been sent. */
 764void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 765
 766/* Append event to the queue.
 767 * Returns NULL on failure or a pointer to the event on success.
 768 * ptr must be kmalloc()ed (and not be freed by the caller).
 769 */
 770struct event_t *gigaset_add_event(struct cardstate *cs,
 771                                  struct at_state_t *at_state, int type,
 772                                  void *ptr, int parameter, void *arg);
 773
 774/* Called on CONFIG1 command from frontend. */
 775int gigaset_enterconfigmode(struct cardstate *cs);
 776
 777/* cs->lock must not be locked */
 778static inline void gigaset_schedule_event(struct cardstate *cs)
 779{
 780        unsigned long flags;
 781        spin_lock_irqsave(&cs->lock, flags);
 782        if (cs->running)
 783                tasklet_schedule(&cs->event_tasklet);
 784        spin_unlock_irqrestore(&cs->lock, flags);
 785}
 786
 787/* Tell common.c that B channel has been closed. */
 788/* cs->lock must not be locked */
 789static inline void gigaset_bchannel_down(struct bc_state *bcs)
 790{
 791        gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 792        gigaset_schedule_event(bcs->cs);
 793}
 794
 795/* Tell common.c that B channel has been opened. */
 796/* cs->lock must not be locked */
 797static inline void gigaset_bchannel_up(struct bc_state *bcs)
 798{
 799        gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 800        gigaset_schedule_event(bcs->cs);
 801}
 802
 803/* set up next receive skb for data mode */
 804static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs)
 805{
 806        struct cardstate *cs = bcs->cs;
 807        unsigned short hw_hdr_len = cs->hw_hdr_len;
 808
 809        if (bcs->ignore) {
 810                bcs->rx_skb = NULL;
 811        } else {
 812                bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len);
 813                if (bcs->rx_skb == NULL)
 814                        dev_warn(cs->dev, "could not allocate skb\n");
 815                else
 816                        skb_reserve(bcs->rx_skb, hw_hdr_len);
 817        }
 818        return bcs->rx_skb;
 819}
 820
 821/* append received bytes to inbuf */
 822int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 823                       unsigned numbytes);
 824
 825/* ===========================================================================
 826 *  Functions implemented in interface.c
 827 */
 828
 829/* initialize interface */
 830void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 831                           const char *devname);
 832/* release interface */
 833void gigaset_if_freedriver(struct gigaset_driver *drv);
 834/* add minor */
 835void gigaset_if_init(struct cardstate *cs);
 836/* remove minor */
 837void gigaset_if_free(struct cardstate *cs);
 838/* device received data */
 839void gigaset_if_receive(struct cardstate *cs,
 840                        unsigned char *buffer, size_t len);
 841
 842#endif
 843
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