drivers/isdn/gigaset/gigaset.h

   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
  70 extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
  71
  72 /* debug flags, combine by adding/bitwise OR */
  73 enum 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
 117 void 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_HLC          6
 190 #define AT_CLIP         7
 191 /* total number */
 192 #define AT_NUM          8
 193
 194 /* variables in struct at_state_t */
 195 #define VAR_ZSAU        0
 196 #define VAR_ZDLE        1
 197 #define VAR_ZVLS        2
 198 #define VAR_ZCTP        3
 199 #define VAR_NUM         4
 200
 201 #define STR_NMBR        0
 202 #define STR_ZCPN        1
 203 #define STR_ZCON        2
 204 #define STR_ZBC         3
 205 #define STR_ZHLC        4
 206 #define STR_NUM         5
 207
 208 #define EV_TIMEOUT      -105
 209 #define EV_IF_VER       -106
 210 #define EV_PROC_CIDMODE -107
 211 #define EV_SHUTDOWN     -108
 212 #define EV_START        -110
 213 #define EV_STOP         -111
 214 #define EV_IF_LOCK      -112
 215 #define EV_ACCEPT       -114
 216 #define EV_DIAL         -115
 217 #define EV_HUP          -116
 218 #define EV_BC_OPEN      -117
 219 #define EV_BC_CLOSED    -118
 220
 221 /* input state */
 222 #define INS_command     0x0001  /* receiving messages (not payload data) */
 223 #define INS_DLE_char    0x0002  /* DLE flag received (in DLE mode) */
 224 #define INS_byte_stuff  0x0004
 225 #define INS_have_data   0x0008
 226 #define INS_DLE_command 0x0020  /* DLE message start (<DLE> X) received */
 227 #define INS_flag_hunt   0x0040
 228
 229 /* channel state */
 230 #define CHS_D_UP        0x01
 231 #define CHS_B_UP        0x02
 232 #define CHS_NOTIFY_LL   0x04
 233
 234 #define ICALL_REJECT    0
 235 #define ICALL_ACCEPT    1
 236 #define ICALL_IGNORE    2
 237
 238 /* device state */
 239 #define MS_UNINITIALIZED        0
 240 #define MS_INIT                 1
 241 #define MS_LOCKED               2
 242 #define MS_SHUTDOWN             3
 243 #define MS_RECOVER              4
 244 #define MS_READY                5
 245
 246 /* mode */
 247 #define M_UNKNOWN       0
 248 #define M_CONFIG        1
 249 #define M_UNIMODEM      2
 250 #define M_CID           3
 251
 252 /* start mode */
 253 #define SM_LOCKED       0
 254 #define SM_ISDN         1 /* default */
 255
 256 /* layer 2 protocols (AT^SBPR=...) */
 257 #define L2_BITSYNC      0
 258 #define L2_HDLC         1
 259 #define L2_VOICE        2
 260
 261 struct gigaset_ops;
 262 struct gigaset_driver;
 263
 264 struct usb_cardstate;
 265 struct ser_cardstate;
 266 struct bas_cardstate;
 267
 268 struct bc_state;
 269 struct usb_bc_state;
 270 struct ser_bc_state;
 271 struct bas_bc_state;
 272
 273 struct reply_t {
 274         int     resp_code;      /* RSP_XXXX */
 275         int     min_ConState;   /* <0 => ignore */
 276         int     max_ConState;   /* <0 => ignore */
 277         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 278         int     new_ConState;   /* <0 => ignore */
 279         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 280         int     action[MAXACT]; /* ACT_XXXX */
 281         char    *command;       /* NULL==none */
 282 };
 283
 284 extern struct reply_t gigaset_tab_cid[];
 285 extern struct reply_t gigaset_tab_nocid[];
 286
 287 struct inbuf_t {
 288         struct cardstate        *cs;
 289         int                     inputstate;
 290         int                     head, tail;
 291         unsigned char           data[RBUFSIZE];
 292 };
 293
 294 /* isochronous write buffer structure
 295  * circular buffer with pad area for extraction of complete USB frames
 296  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 297  * - data[nextread..write-1] is valid data yet to be sent
 298  * - data[write] is the next byte to write to
 299  *   - in byte-oriented L2 procotols, it is completely free
 300  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 301  * - data[write+1..read-1] is free
 302  * - wbits is the number of valid data bits in data[write], starting at the LSB
 303  * - writesem is the semaphore for writing to the buffer:
 304  *   if writesem <= 0, data[write..read-1] is currently being written to
 305  * - idle contains the byte value to repeat when the end of valid data is
 306  *   reached; if nextread==write (buffer contains no data to send), either the
 307  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 308  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 309  *   are also filled with that value
 310  */
 311 struct isowbuf_t {
 312         int             read;
 313         int             nextread;
 314         int             write;
 315         atomic_t        writesem;
 316         int             wbits;
 317         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 318         unsigned char   idle;
 319 };
 320
 321 /* isochronous write URB context structure
 322  * data to be stored along with the URB and retrieved when it is returned
 323  * as completed by the USB subsystem
 324  * - urb: pointer to the URB itself
 325  * - bcs: pointer to the B Channel control structure
 326  * - limit: end of write buffer area covered by this URB
 327  * - status: URB completion status
 328  */
 329 struct isow_urbctx_t {
 330         struct urb *urb;
 331         struct bc_state *bcs;
 332         int limit;
 333         int status;
 334 };
 335
 336 /* AT state structure
 337  * data associated with the state of an ISDN connection, whether or not
 338  * it is currently assigned a B channel
 339  */
 340 struct at_state_t {
 341         struct list_head        list;
 342         int                     waiting;
 343         int                     getstring;
 344         unsigned                timer_index;
 345         unsigned long           timer_expires;
 346         int                     timer_active;
 347         unsigned int            ConState;       /* State of connection */
 348         struct reply_t          *replystruct;
 349         int                     cid;
 350         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 351         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 352         unsigned                pending_commands;       /* see PC_XXXX */
 353         unsigned                seq_index;
 354
 355         struct cardstate        *cs;
 356         struct bc_state         *bcs;
 357 };
 358
 359 struct event_t {
 360         int type;
 361         void *ptr, *arg;
 362         int parameter;
 363         int cid;
 364         struct at_state_t *at_state;
 365 };
 366
 367 /* This buffer holds all information about the used B-Channel */
 368 struct bc_state {
 369         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 370         struct sk_buff_head squeue;     /* B-Channel send Queue */
 371
 372         /* Variables for debugging .. */
 373         int corrupted;                  /* Counter for corrupted packages */
 374         int trans_down;                 /* Counter of packages (downstream) */
 375         int trans_up;                   /* Counter of packages (upstream) */
 376
 377         struct at_state_t at_state;
 378
 379         /* receive buffer */
 380         unsigned rx_bufsize;            /* max size accepted by application */
 381         struct sk_buff *rx_skb;
 382         __u16 rx_fcs;
 383         int inputstate;                 /* see INS_XXXX */
 384
 385         int channel;
 386
 387         struct cardstate *cs;
 388
 389         unsigned chstate;               /* bitmap (CHS_*) */
 390         int ignore;
 391         unsigned proto2;                /* layer 2 protocol (L2_*) */
 392         char *commands[AT_NUM];         /* see AT_XXXX */
 393
 394 #ifdef CONFIG_GIGASET_DEBUG
 395         int emptycount;
 396 #endif
 397         int busy;
 398         int use_count;
 399
 400         /* private data of hardware drivers */
 401         union {
 402                 struct ser_bc_state *ser;       /* serial hardware driver */
 403                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 404                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 405         } hw;
 406
 407         void *ap;                       /* LL application structure */
 408 };
 409
 410 struct cardstate {
 411         struct gigaset_driver *driver;
 412         unsigned minor_index;
 413         struct device *dev;
 414         struct device *tty_dev;
 415         unsigned flags;
 416
 417         const struct gigaset_ops *ops;
 418
 419         /* Stuff to handle communication */
 420         wait_queue_head_t waitqueue;
 421         int waiting;
 422         int mode;                       /* see M_XXXX */
 423         int mstate;                     /* Modem state: see MS_XXXX */
 424                                         /* only changed by the event layer */
 425         int cmd_result;
 426
 427         int channels;
 428         struct bc_state *bcs;           /* Array of struct bc_state */
 429
 430         int onechannel;                 /* data and commands transmitted in one
 431                                            stream (M10x) */
 432
 433         spinlock_t lock;
 434         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 435         struct list_head temp_at_states;/* list of temporary "struct
 436                                            at_state_t"s without B channel */
 437
 438         struct inbuf_t *inbuf;
 439
 440         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 441         spinlock_t cmdlock;
 442         unsigned curlen, cmdbytes;
 443
 444         unsigned open_count;
 445         struct tty_struct *tty;
 446         struct tasklet_struct if_wake_tasklet;
 447         unsigned control_state;
 448
 449         unsigned fwver[4];
 450         int gotfwver;
 451
 452         unsigned running;               /* !=0 if events are handled */
 453         unsigned connected;             /* !=0 if hardware is connected */
 454         unsigned isdn_up;               /* !=0 after gigaset_isdn_start() */
 455
 456         unsigned cidmode;
 457
 458         int myid;                       /* id for communication with LL */
 459         void *iif;                      /* LL interface structure */
 460         unsigned short hw_hdr_len;      /* headroom needed in data skbs */
 461
 462         struct reply_t *tabnocid;
 463         struct reply_t *tabcid;
 464         int cs_init;
 465         int ignoreframes;               /* frames to ignore after setting up the
 466                                            B channel */
 467         struct mutex mutex;             /* locks this structure:
 468                                          *   connected is not changed,
 469                                          *   hardware_up is not changed,
 470                                          *   MState is not changed to or from
 471                                          *   MS_LOCKED */
 472
 473         struct timer_list timer;
 474         int retry_count;
 475         int dle;                        /* !=0 if DLE mode is active
 476                                            (ZDLE=1 received -- M10x only) */
 477         int cur_at_seq;                 /* sequence of AT commands being
 478                                            processed */
 479         int curchannel;                 /* channel those commands are meant
 480                                            for */
 481         int commands_pending;           /* flag(s) in xxx.commands_pending have
 482                                            been set */
 483         struct tasklet_struct event_tasklet;
 484                                         /* tasklet for serializing AT commands.
 485                                          * Scheduled
 486                                          *   -> for modem reponses (and
 487                                          *      incoming data for M10x)
 488                                          *   -> on timeout
 489                                          *   -> after setting bits in
 490                                          *      xxx.at_state.pending_command
 491                                          *      (e.g. command from LL) */
 492         struct tasklet_struct write_tasklet;
 493                                         /* tasklet for serial output
 494                                          * (not used in base driver) */
 495
 496         /* event queue */
 497         struct event_t events[MAX_EVENTS];
 498         unsigned ev_tail, ev_head;
 499         spinlock_t ev_lock;
 500
 501         /* current modem response */
 502         unsigned char respdata[MAX_RESP_SIZE+1];
 503         unsigned cbytes;
 504
 505         /* private data of hardware drivers */
 506         union {
 507                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 508                 struct ser_cardstate *ser; /* serial hardware driver */
 509                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 510         } hw;
 511 };
 512
 513 struct gigaset_driver {
 514         struct list_head list;
 515         spinlock_t lock;                /* locks minor tables and blocked */
 516         struct tty_driver *tty;
 517         unsigned have_tty;
 518         unsigned minor;
 519         unsigned minors;
 520         struct cardstate *cs;
 521         int blocked;
 522
 523         const struct gigaset_ops *ops;
 524         struct module *owner;
 525 };
 526
 527 struct cmdbuf_t {
 528         struct cmdbuf_t *next, *prev;
 529         int len, offset;
 530         struct tasklet_struct *wake_tasklet;
 531         unsigned char buf[0];
 532 };
 533
 534 struct bas_bc_state {
 535         /* isochronous output state */
 536         int             running;
 537         atomic_t        corrbytes;
 538         spinlock_t      isooutlock;
 539         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 540         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 541         struct isowbuf_t        *isooutbuf;
 542         unsigned numsub;                /* submitted URB counter
 543                                            (for diagnostic messages only) */
 544         struct tasklet_struct   sent_tasklet;
 545
 546         /* isochronous input state */
 547         spinlock_t isoinlock;
 548         struct urb *isoinurbs[BAS_INURBS];
 549         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 550         struct urb *isoindone;          /* completed isoc read URB */
 551         int isoinstatus;                /* status of completed URB */
 552         int loststatus;                 /* status of dropped URB */
 553         unsigned isoinlost;             /* number of bytes lost */
 554         /* state of bit unstuffing algorithm
 555            (in addition to BC_state.inputstate) */
 556         unsigned seqlen;                /* number of '1' bits not yet
 557                                            unstuffed */
 558         unsigned inbyte, inbits;        /* collected bits for next byte */
 559         /* statistics */
 560         unsigned goodbytes;             /* bytes correctly received */
 561         unsigned alignerrs;             /* frames with incomplete byte at end */
 562         unsigned fcserrs;               /* FCS errors */
 563         unsigned frameerrs;             /* framing errors */
 564         unsigned giants;                /* long frames */
 565         unsigned runts;                 /* short frames */
 566         unsigned aborts;                /* HDLC aborts */
 567         unsigned shared0s;              /* '0' bits shared between flags */
 568         unsigned stolen0s;              /* '0' stuff bits also serving as
 569                                            leading flag bits */
 570         struct tasklet_struct rcvd_tasklet;
 571 };
 572
 573 struct gigaset_ops {
 574         /* Called from ev-layer.c/interface.c for sending AT commands to the
 575            device */
 576         int (*write_cmd)(struct cardstate *cs,
 577                          const unsigned char *buf, int len,
 578                          struct tasklet_struct *wake_tasklet);
 579
 580         /* Called from interface.c for additional device control */
 581         int (*write_room)(struct cardstate *cs);
 582         int (*chars_in_buffer)(struct cardstate *cs);
 583         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 584
 585         /* Called from ev-layer.c after setting up connection
 586          * Should call gigaset_bchannel_up(), when finished. */
 587         int (*init_bchannel)(struct bc_state *bcs);
 588
 589         /* Called from ev-layer.c after hanging up
 590          * Should call gigaset_bchannel_down(), when finished. */
 591         int (*close_bchannel)(struct bc_state *bcs);
 592
 593         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 594         int (*initbcshw)(struct bc_state *bcs);
 595
 596         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 597         int (*freebcshw)(struct bc_state *bcs);
 598
 599         /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
 600         void (*reinitbcshw)(struct bc_state *bcs);
 601
 602         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 603         int (*initcshw)(struct cardstate *cs);
 604
 605         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 606         void (*freecshw)(struct cardstate *cs);
 607
 608         /* Called from common.c/interface.c for additional serial port
 609            control */
 610         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 611                               unsigned new_state);
 612         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 613         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 614
 615         /* Called from LL interface to put an skb into the send-queue.
 616          * After sending is completed, gigaset_skb_sent() must be called
 617          * with the skb's link layer header preserved. */
 618         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 619
 620         /* Called from ev-layer.c to process a block of data
 621          * received through the common/control channel. */
 622         void (*handle_input)(struct inbuf_t *inbuf);
 623
 624 };
 625
 626 /* = Common structures and definitions =======================================
 627  */
 628
 629 /* Parser states for DLE-Event:
 630  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 631  * <DLE_FLAG>:  0x10
 632  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 633  */
 634 #define DLE_FLAG        0x10
 635
 636 /* ===========================================================================
 637  *  Functions implemented in asyncdata.c
 638  */
 639
 640 /* Called from LL interface to put an skb into the send queue. */
 641 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 642
 643 /* Called from ev-layer.c to process a block of data
 644  * received through the common/control channel. */
 645 void gigaset_m10x_input(struct inbuf_t *inbuf);
 646
 647 /* ===========================================================================
 648  *  Functions implemented in isocdata.c
 649  */
 650
 651 /* Called from LL interface to put an skb into the send queue. */
 652 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 653
 654 /* Called from ev-layer.c to process a block of data
 655  * received through the common/control channel. */
 656 void gigaset_isoc_input(struct inbuf_t *inbuf);
 657
 658 /* Called from bas-gigaset.c to process a block of data
 659  * received through the isochronous channel */
 660 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 661                           struct bc_state *bcs);
 662
 663 /* Called from bas-gigaset.c to put a block of data
 664  * into the isochronous output buffer */
 665 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 666
 667 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 668 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 669
 670 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 671 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 672
 673 /* ===========================================================================
 674  *  Functions implemented in LL interface
 675  */
 676
 677 /* Called from common.c for setting up/shutting down with the ISDN subsystem */
 678 void gigaset_isdn_regdrv(void);
 679 void gigaset_isdn_unregdrv(void);
 680 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
 681 void gigaset_isdn_unregdev(struct cardstate *cs);
 682
 683 /* Called from hardware module to indicate completion of an skb */
 684 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 685 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
 686 void gigaset_isdn_rcv_err(struct bc_state *bcs);
 687
 688 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 689 void gigaset_isdn_start(struct cardstate *cs);
 690 void gigaset_isdn_stop(struct cardstate *cs);
 691 int gigaset_isdn_icall(struct at_state_t *at_state);
 692 void gigaset_isdn_connD(struct bc_state *bcs);
 693 void gigaset_isdn_hupD(struct bc_state *bcs);
 694 void gigaset_isdn_connB(struct bc_state *bcs);
 695 void gigaset_isdn_hupB(struct bc_state *bcs);
 696
 697 /* ===========================================================================
 698  *  Functions implemented in ev-layer.c
 699  */
 700
 701 /* tasklet called from common.c to process queued events */
 702 void gigaset_handle_event(unsigned long data);
 703
 704 /* called from isocdata.c / asyncdata.c
 705  * when a complete modem response line has been received */
 706 void gigaset_handle_modem_response(struct cardstate *cs);
 707
 708 /* ===========================================================================
 709  *  Functions implemented in proc.c
 710  */
 711
 712 /* initialize sysfs for device */
 713 void gigaset_init_dev_sysfs(struct cardstate *cs);
 714 void gigaset_free_dev_sysfs(struct cardstate *cs);
 715
 716 /* ===========================================================================
 717  *  Functions implemented in common.c/gigaset.h
 718  */
 719
 720 void gigaset_bcs_reinit(struct bc_state *bcs);
 721 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 722                      struct cardstate *cs, int cid);
 723 int gigaset_get_channel(struct bc_state *bcs);
 724 struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
 725 void gigaset_free_channel(struct bc_state *bcs);
 726 int gigaset_get_channels(struct cardstate *cs);
 727 void gigaset_free_channels(struct cardstate *cs);
 728 void gigaset_block_channels(struct cardstate *cs);
 729
 730 /* Allocate and initialize driver structure. */
 731 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 732                                           const char *procname,
 733                                           const char *devname,
 734                                           const struct gigaset_ops *ops,
 735                                           struct module *owner);
 736
 737 /* Deallocate driver structure. */
 738 void gigaset_freedriver(struct gigaset_driver *drv);
 739 void gigaset_debugdrivers(void);
 740 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 741 struct cardstate *gigaset_get_cs_by_id(int id);
 742 void gigaset_blockdriver(struct gigaset_driver *drv);
 743
 744 /* Allocate and initialize card state. Calls hardware dependent
 745    gigaset_init[b]cs(). */
 746 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 747                                  int onechannel, int ignoreframes,
 748                                  int cidmode, const char *modulename);
 749
 750 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 751 void gigaset_freecs(struct cardstate *cs);
 752
 753 /* Tell common.c that hardware and driver are ready. */
 754 int gigaset_start(struct cardstate *cs);
 755
 756 /* Tell common.c that the device is not present any more. */
 757 void gigaset_stop(struct cardstate *cs);
 758
 759 /* Tell common.c that the driver is being unloaded. */
 760 int gigaset_shutdown(struct cardstate *cs);
 761
 762 /* Tell common.c that an skb has been sent. */
 763 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 764
 765 /* Append event to the queue.
 766  * Returns NULL on failure or a pointer to the event on success.
 767  * ptr must be kmalloc()ed (and not be freed by the caller).
 768  */
 769 struct event_t *gigaset_add_event(struct cardstate *cs,
 770                                   struct at_state_t *at_state, int type,
 771                                   void *ptr, int parameter, void *arg);
 772
 773 /* Called on CONFIG1 command from frontend. */
 774 int gigaset_enterconfigmode(struct cardstate *cs);
 775
 776 /* cs->lock must not be locked */
 777 static inline void gigaset_schedule_event(struct cardstate *cs)
 778 {
 779         unsigned long flags;
 780         spin_lock_irqsave(&cs->lock, flags);
 781         if (cs->running)
 782                 tasklet_schedule(&cs->event_tasklet);
 783         spin_unlock_irqrestore(&cs->lock, flags);
 784 }
 785
 786 /* Tell common.c that B channel has been closed. */
 787 /* cs->lock must not be locked */
 788 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 789 {
 790         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 791         gigaset_schedule_event(bcs->cs);
 792 }
 793
 794 /* Tell common.c that B channel has been opened. */
 795 /* cs->lock must not be locked */
 796 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 797 {
 798         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 799         gigaset_schedule_event(bcs->cs);
 800 }
 801
 802 /* set up next receive skb for data mode */
 803 static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs)
 804 {
 805         struct cardstate *cs = bcs->cs;
 806         unsigned short hw_hdr_len = cs->hw_hdr_len;
 807
 808         if (bcs->ignore) {
 809                 bcs->rx_skb = NULL;
 810         } else {
 811                 bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len);
 812                 if (bcs->rx_skb == NULL)
 813                         dev_warn(cs->dev, "could not allocate skb\n");
 814                 else
 815                         skb_reserve(bcs->rx_skb, hw_hdr_len);
 816         }
 817         return bcs->rx_skb;
 818 }
 819
 820 /* append received bytes to inbuf */
 821 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 822                        unsigned numbytes);
 823
 824 /* ===========================================================================
 825  *  Functions implemented in interface.c
 826  */
 827
 828 /* initialize interface */
 829 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 830                            const char *devname);
 831 /* release interface */
 832 void gigaset_if_freedriver(struct gigaset_driver *drv);
 833 /* add minor */
 834 void gigaset_if_init(struct cardstate *cs);
 835 /* remove minor */
 836 void gigaset_if_free(struct cardstate *cs);
 837 /* device received data */
 838 void gigaset_if_receive(struct cardstate *cs,
 839                         unsigned char *buffer, size_t len);
 840
 841 #endif