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 #include <linux/kernel.h>
  20 #include <linux/compiler.h>
  21 #include <linux/types.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/isdnif.h>
  24 #include <linux/usb.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/ppp_defs.h>
  28 #include <linux/timer.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/tty.h>
  31 #include <linux/tty_driver.h>
  32 #include <linux/list.h>
  33 #include <asm/atomic.h>
  34
  35 #define GIG_VERSION {0,5,0,0}
  36 #define GIG_COMPAT  {0,4,0,0}
  37
  38 #define MAX_REC_PARAMS 10       /* Max. number of params in response string */
  39 #define MAX_RESP_SIZE 512       /* Max. size of a response string */
  40 #define HW_HDR_LEN 2            /* Header size used to store ack info */
  41
  42 #define MAX_EVENTS 64           /* size of event queue */
  43
  44 #define RBUFSIZE 8192
  45 #define SBUFSIZE 4096           /* sk_buff payload size */
  46
  47 #define TRANSBUFSIZE 768        /* bytes per skb for transparent receive */
  48 #define MAX_BUF_SIZE (SBUFSIZE - 2)     /* Max. size of a data packet from LL */
  49
  50 /* compile time options */
  51 #define GIG_MAJOR 0
  52
  53 #define GIG_MAYINITONDIAL
  54 #define GIG_RETRYCID
  55 #define GIG_X75
  56
  57 #define GIG_TICK 100            /* in milliseconds */
  58
  59 /* timeout values (unit: 1 sec) */
  60 #define INIT_TIMEOUT 1
  61
  62 /* timeout values (unit: 0.1 sec) */
  63 #define RING_TIMEOUT 3          /* for additional parameters to RING */
  64 #define BAS_TIMEOUT 20          /* for response to Base USB ops */
  65 #define ATRDY_TIMEOUT 3         /* for HD_READY_SEND_ATDATA */
  66
  67 #define BAS_RETRY 3             /* max. retries for base USB ops */
  68
  69 #define MAXACT 3
  70
  71 extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
  72
  73 /* debug flags, combine by adding/bitwise OR */
  74 enum debuglevel {
  75         DEBUG_INTR        = 0x00008, /* interrupt processing */
  76         DEBUG_CMD         = 0x00020, /* sent/received LL commands */
  77         DEBUG_STREAM      = 0x00040, /* application data stream I/O events */
  78         DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
  79         DEBUG_LLDATA      = 0x00100, /* sent/received LL data */
  80         DEBUG_DRIVER      = 0x00400, /* driver structure */
  81         DEBUG_HDLC        = 0x00800, /* M10x HDLC processing */
  82         DEBUG_WRITE       = 0x01000, /* M105 data write */
  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 /* Kernel message macros for situations where dev_printk and friends cannot be
 101  * used for lack of reliable access to a device structure.
 102  * linux/usb.h already contains these but in an obsolete form which clutters
 103  * the log needlessly, and according to the USB maintainer those should be
 104  * removed rather than fixed anyway.
 105  */
 106 #undef err
 107 #undef info
 108 #undef warn
 109
 110 #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
 111         format "\n" , ## arg)
 112 #define info(format, arg...) printk(KERN_INFO KBUILD_MODNAME ": " \
 113         format "\n" , ## arg)
 114 #define warn(format, arg...) printk(KERN_WARNING KBUILD_MODNAME ": " \
 115         format "\n" , ## arg)
 116
 117 #ifdef CONFIG_GIGASET_DEBUG
 118
 119 #define gig_dbg(level, format, arg...) \
 120         do { \
 121                 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 122                         printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
 123                                ## arg); \
 124         } while (0)
 125 #define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 126
 127 #else
 128
 129 #define gig_dbg(level, format, arg...) do {} while (0)
 130 #define DEBUG_DEFAULT 0
 131
 132 #endif
 133
 134 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 135                         size_t len, const unsigned char *buf);
 136
 137 /* connection state */
 138 #define ZSAU_NONE                       0
 139 #define ZSAU_DISCONNECT_IND             4
 140 #define ZSAU_OUTGOING_CALL_PROCEEDING   1
 141 #define ZSAU_PROCEEDING                 1
 142 #define ZSAU_CALL_DELIVERED             2
 143 #define ZSAU_ACTIVE                     3
 144 #define ZSAU_NULL                       5
 145 #define ZSAU_DISCONNECT_REQ             6
 146 #define ZSAU_UNKNOWN                    -1
 147
 148 /* USB control transfer requests */
 149 #define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 150 #define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 151
 152 /* int-in-events 3070 */
 153 #define HD_B1_FLOW_CONTROL              0x80
 154 #define HD_B2_FLOW_CONTROL              0x81
 155 #define HD_RECEIVEATDATA_ACK            (0x35)          // 3070
 156                                                 // att: HD_RECEIVE>>AT<<DATA_ACK
 157 #define HD_READY_SEND_ATDATA            (0x36)          // 3070
 158 #define HD_OPEN_ATCHANNEL_ACK           (0x37)          // 3070
 159 #define HD_CLOSE_ATCHANNEL_ACK          (0x38)          // 3070
 160 #define HD_DEVICE_INIT_OK               (0x11)          // ISurf USB + 3070
 161 #define HD_OPEN_B1CHANNEL_ACK           (0x51)          // ISurf USB + 3070
 162 #define HD_OPEN_B2CHANNEL_ACK           (0x52)          // ISurf USB + 3070
 163 #define HD_CLOSE_B1CHANNEL_ACK          (0x53)          // ISurf USB + 3070
 164 #define HD_CLOSE_B2CHANNEL_ACK          (0x54)          // ISurf USB + 3070
 165 //       Powermangment
 166 #define HD_SUSPEND_END                  (0x61)          // ISurf USB
 167 //   Configuration
 168 #define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          // ISurf USB + 3070
 169
 170 /* control requests 3070 */
 171 #define HD_OPEN_B1CHANNEL               (0x23)          // ISurf USB + 3070
 172 #define HD_CLOSE_B1CHANNEL              (0x24)          // ISurf USB + 3070
 173 #define HD_OPEN_B2CHANNEL               (0x25)          // ISurf USB + 3070
 174 #define HD_CLOSE_B2CHANNEL              (0x26)          // ISurf USB + 3070
 175 #define HD_RESET_INTERRUPT_PIPE         (0x27)          // ISurf USB + 3070
 176 #define HD_DEVICE_INIT_ACK              (0x34)          // ISurf USB + 3070
 177 #define HD_WRITE_ATMESSAGE              (0x12)          // 3070
 178 #define HD_READ_ATMESSAGE               (0x13)          // 3070
 179 #define HD_OPEN_ATCHANNEL               (0x28)          // 3070
 180 #define HD_CLOSE_ATCHANNEL              (0x29)          // 3070
 181
 182 /* number of B channels supported by base driver */
 183 #define BAS_CHANNELS    2
 184
 185 /* USB frames for isochronous transfer */
 186 #define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 187 #define BAS_NUMFRAMES   8       /* number of frames per URB */
 188 #define BAS_MAXFRAME    16      /* allocated bytes per frame */
 189 #define BAS_NORMFRAME   8       /* send size without flow control */
 190 #define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 191 #define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 192 #define BAS_CORRFRAMES  4       /* flow control multiplicator */
 193
 194 #define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 195                                         /* size of isoc in buf per URB */
 196 #define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 197 #define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 198
 199 #define BAS_INURBS      3
 200 #define BAS_OUTURBS     3
 201
 202 /* variable commands in struct bc_state */
 203 #define AT_ISO          0
 204 #define AT_DIAL         1
 205 #define AT_MSN          2
 206 #define AT_BC           3
 207 #define AT_PROTO        4
 208 #define AT_TYPE         5
 209 #define AT_HLC          6
 210 #define AT_NUM          7
 211
 212 /* variables in struct at_state_t */
 213 #define VAR_ZSAU        0
 214 #define VAR_ZDLE        1
 215 #define VAR_ZVLS        2
 216 #define VAR_ZCTP        3
 217 #define VAR_NUM         4
 218
 219 #define STR_NMBR        0
 220 #define STR_ZCPN        1
 221 #define STR_ZCON        2
 222 #define STR_ZBC         3
 223 #define STR_ZHLC        4
 224 #define STR_NUM         5
 225
 226 #define EV_TIMEOUT      -105
 227 #define EV_IF_VER       -106
 228 #define EV_PROC_CIDMODE -107
 229 #define EV_SHUTDOWN     -108
 230 #define EV_START        -110
 231 #define EV_STOP         -111
 232 #define EV_IF_LOCK      -112
 233 #define EV_PROTO_L2     -113
 234 #define EV_ACCEPT       -114
 235 #define EV_DIAL         -115
 236 #define EV_HUP          -116
 237 #define EV_BC_OPEN      -117
 238 #define EV_BC_CLOSED    -118
 239
 240 /* input state */
 241 #define INS_command     0x0001
 242 #define INS_DLE_char    0x0002
 243 #define INS_byte_stuff  0x0004
 244 #define INS_have_data   0x0008
 245 #define INS_skip_frame  0x0010
 246 #define INS_DLE_command 0x0020
 247 #define INS_flag_hunt   0x0040
 248
 249 /* channel state */
 250 #define CHS_D_UP        0x01
 251 #define CHS_B_UP        0x02
 252 #define CHS_NOTIFY_LL   0x04
 253
 254 #define ICALL_REJECT    0
 255 #define ICALL_ACCEPT    1
 256 #define ICALL_IGNORE    2
 257
 258 /* device state */
 259 #define MS_UNINITIALIZED        0
 260 #define MS_INIT                 1
 261 #define MS_LOCKED               2
 262 #define MS_SHUTDOWN             3
 263 #define MS_RECOVER              4
 264 #define MS_READY                5
 265
 266 /* mode */
 267 #define M_UNKNOWN       0
 268 #define M_CONFIG        1
 269 #define M_UNIMODEM      2
 270 #define M_CID           3
 271
 272 /* start mode */
 273 #define SM_LOCKED       0
 274 #define SM_ISDN         1 /* default */
 275
 276 struct gigaset_ops;
 277 struct gigaset_driver;
 278
 279 struct usb_cardstate;
 280 struct ser_cardstate;
 281 struct bas_cardstate;
 282
 283 struct bc_state;
 284 struct usb_bc_state;
 285 struct ser_bc_state;
 286 struct bas_bc_state;
 287
 288 struct reply_t {
 289         int     resp_code;      /* RSP_XXXX */
 290         int     min_ConState;   /* <0 => ignore */
 291         int     max_ConState;   /* <0 => ignore */
 292         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 293         int     new_ConState;   /* <0 => ignore */
 294         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 295         int     action[MAXACT]; /* ACT_XXXX */
 296         char    *command;       /* NULL==none */
 297 };
 298
 299 extern struct reply_t gigaset_tab_cid_m10x[];
 300 extern struct reply_t gigaset_tab_nocid_m10x[];
 301
 302 struct inbuf_t {
 303         unsigned char           *rcvbuf;        /* usb-gigaset receive buffer */
 304         struct bc_state         *bcs;
 305         struct cardstate        *cs;
 306         int                     inputstate;
 307         int                     head, tail;
 308         unsigned char           data[RBUFSIZE];
 309 };
 310
 311 /* isochronous write buffer structure
 312  * circular buffer with pad area for extraction of complete USB frames
 313  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 314  * - data[nextread..write-1] is valid data yet to be sent
 315  * - data[write] is the next byte to write to
 316  *   - in byte-oriented L2 procotols, it is completely free
 317  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 318  * - data[write+1..read-1] is free
 319  * - wbits is the number of valid data bits in data[write], starting at the LSB
 320  * - writesem is the semaphore for writing to the buffer:
 321  *   if writesem <= 0, data[write..read-1] is currently being written to
 322  * - idle contains the byte value to repeat when the end of valid data is
 323  *   reached; if nextread==write (buffer contains no data to send), either the
 324  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 325  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 326  *   are also filled with that value
 327  */
 328 struct isowbuf_t {
 329         int             read;
 330         int             nextread;
 331         int             write;
 332         atomic_t        writesem;
 333         int             wbits;
 334         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 335         unsigned char   idle;
 336 };
 337
 338 /* isochronous write URB context structure
 339  * data to be stored along with the URB and retrieved when it is returned
 340  * as completed by the USB subsystem
 341  * - urb: pointer to the URB itself
 342  * - bcs: pointer to the B Channel control structure
 343  * - limit: end of write buffer area covered by this URB
 344  * - status: URB completion status
 345  */
 346 struct isow_urbctx_t {
 347         struct urb *urb;
 348         struct bc_state *bcs;
 349         int limit;
 350         int status;
 351 };
 352
 353 /* AT state structure
 354  * data associated with the state of an ISDN connection, whether or not
 355  * it is currently assigned a B channel
 356  */
 357 struct at_state_t {
 358         struct list_head        list;
 359         int                     waiting;
 360         int                     getstring;
 361         unsigned                timer_index;
 362         unsigned long           timer_expires;
 363         int                     timer_active;
 364         unsigned int            ConState;       /* State of connection */
 365         struct reply_t          *replystruct;
 366         int                     cid;
 367         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 368         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 369         unsigned                pending_commands;       /* see PC_XXXX */
 370         unsigned                seq_index;
 371
 372         struct cardstate        *cs;
 373         struct bc_state         *bcs;
 374 };
 375
 376 struct resp_type_t {
 377         unsigned char   *response;
 378         int             resp_code;      /* RSP_XXXX */
 379         int             type;           /* RT_XXXX */
 380 };
 381
 382 struct event_t {
 383         int type;
 384         void *ptr, *arg;
 385         int parameter;
 386         int cid;
 387         struct at_state_t *at_state;
 388 };
 389
 390 /* This buffer holds all information about the used B-Channel */
 391 struct bc_state {
 392         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 393         struct sk_buff_head squeue;     /* B-Channel send Queue */
 394
 395         /* Variables for debugging .. */
 396         int corrupted;                  /* Counter for corrupted packages */
 397         int trans_down;                 /* Counter of packages (downstream) */
 398         int trans_up;                   /* Counter of packages (upstream) */
 399
 400         struct at_state_t at_state;
 401         unsigned long rcvbytes;
 402
 403         __u16 fcs;
 404         struct sk_buff *skb;
 405         int inputstate;                 /* see INS_XXXX */
 406
 407         int channel;
 408
 409         struct cardstate *cs;
 410
 411         unsigned chstate;               /* bitmap (CHS_*) */
 412         int ignore;
 413         unsigned proto2;                /* Layer 2 protocol (ISDN_PROTO_L2_*) */
 414         char *commands[AT_NUM];         /* see AT_XXXX */
 415
 416 #ifdef CONFIG_GIGASET_DEBUG
 417         int emptycount;
 418 #endif
 419         int busy;
 420         int use_count;
 421
 422         /* private data of hardware drivers */
 423         union {
 424                 struct ser_bc_state *ser;       /* serial hardware driver */
 425                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 426                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 427         } hw;
 428 };
 429
 430 struct cardstate {
 431         struct gigaset_driver *driver;
 432         unsigned minor_index;
 433         struct device *dev;
 434         struct device *tty_dev;
 435         unsigned flags;
 436
 437         const struct gigaset_ops *ops;
 438
 439         /* Stuff to handle communication */
 440         wait_queue_head_t waitqueue;
 441         int waiting;
 442         int mode;                       /* see M_XXXX */
 443         int mstate;                     /* Modem state: see MS_XXXX */
 444                                         /* only changed by the event layer */
 445         int cmd_result;
 446
 447         int channels;
 448         struct bc_state *bcs;           /* Array of struct bc_state */
 449
 450         int onechannel;                 /* data and commands transmitted in one
 451                                            stream (M10x) */
 452
 453         spinlock_t lock;
 454         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 455         struct list_head temp_at_states;/* list of temporary "struct
 456                                            at_state_t"s without B channel */
 457
 458         struct inbuf_t *inbuf;
 459
 460         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 461         spinlock_t cmdlock;
 462         unsigned curlen, cmdbytes;
 463
 464         unsigned open_count;
 465         struct tty_struct *tty;
 466         struct tasklet_struct if_wake_tasklet;
 467         unsigned control_state;
 468
 469         unsigned fwver[4];
 470         int gotfwver;
 471
 472         unsigned running;               /* !=0 if events are handled */
 473         unsigned connected;             /* !=0 if hardware is connected */
 474         unsigned isdn_up;               /* !=0 after ISDN_STAT_RUN */
 475
 476         unsigned cidmode;
 477
 478         int myid;                       /* id for communication with LL */
 479         isdn_if iif;
 480
 481         struct reply_t *tabnocid;
 482         struct reply_t *tabcid;
 483         int cs_init;
 484         int ignoreframes;               /* frames to ignore after setting up the
 485                                            B channel */
 486         struct mutex mutex;             /* locks this structure:
 487                                          *   connected is not changed,
 488                                          *   hardware_up is not changed,
 489                                          *   MState is not changed to or from
 490                                          *   MS_LOCKED */
 491
 492         struct timer_list timer;
 493         int retry_count;
 494         int dle;                        /* !=0 if modem commands/responses are
 495                                            dle encoded */
 496         int cur_at_seq;                 /* sequence of AT commands being
 497                                            processed */
 498         int curchannel;                 /* channel those commands are meant
 499                                            for */
 500         int commands_pending;           /* flag(s) in xxx.commands_pending have
 501                                            been set */
 502         struct tasklet_struct event_tasklet;
 503                                         /* tasklet for serializing AT commands.
 504                                          * Scheduled
 505                                          *   -> for modem reponses (and
 506                                          *      incoming data for M10x)
 507                                          *   -> on timeout
 508                                          *   -> after setting bits in
 509                                          *      xxx.at_state.pending_command
 510                                          *      (e.g. command from LL) */
 511         struct tasklet_struct write_tasklet;
 512                                         /* tasklet for serial output
 513                                          * (not used in base driver) */
 514
 515         /* event queue */
 516         struct event_t events[MAX_EVENTS];
 517         unsigned ev_tail, ev_head;
 518         spinlock_t ev_lock;
 519
 520         /* current modem response */
 521         unsigned char respdata[MAX_RESP_SIZE];
 522         unsigned cbytes;
 523
 524         /* private data of hardware drivers */
 525         union {
 526                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 527                 struct ser_cardstate *ser; /* serial hardware driver */
 528                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 529         } hw;
 530 };
 531
 532 struct gigaset_driver {
 533         struct list_head list;
 534         spinlock_t lock;                /* locks minor tables and blocked */
 535         struct tty_driver *tty;
 536         unsigned have_tty;
 537         unsigned minor;
 538         unsigned minors;
 539         struct cardstate *cs;
 540         int blocked;
 541
 542         const struct gigaset_ops *ops;
 543         struct module *owner;
 544 };
 545
 546 struct cmdbuf_t {
 547         struct cmdbuf_t *next, *prev;
 548         int len, offset;
 549         struct tasklet_struct *wake_tasklet;
 550         unsigned char buf[0];
 551 };
 552
 553 struct bas_bc_state {
 554         /* isochronous output state */
 555         int             running;
 556         atomic_t        corrbytes;
 557         spinlock_t      isooutlock;
 558         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 559         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 560         struct isowbuf_t        *isooutbuf;
 561         unsigned numsub;                /* submitted URB counter
 562                                            (for diagnostic messages only) */
 563         struct tasklet_struct   sent_tasklet;
 564
 565         /* isochronous input state */
 566         spinlock_t isoinlock;
 567         struct urb *isoinurbs[BAS_INURBS];
 568         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 569         struct urb *isoindone;          /* completed isoc read URB */
 570         int isoinstatus;                /* status of completed URB */
 571         int loststatus;                 /* status of dropped URB */
 572         unsigned isoinlost;             /* number of bytes lost */
 573         /* state of bit unstuffing algorithm
 574            (in addition to BC_state.inputstate) */
 575         unsigned seqlen;                /* number of '1' bits not yet
 576                                            unstuffed */
 577         unsigned inbyte, inbits;        /* collected bits for next byte */
 578         /* statistics */
 579         unsigned goodbytes;             /* bytes correctly received */
 580         unsigned alignerrs;             /* frames with incomplete byte at end */
 581         unsigned fcserrs;               /* FCS errors */
 582         unsigned frameerrs;             /* framing errors */
 583         unsigned giants;                /* long frames */
 584         unsigned runts;                 /* short frames */
 585         unsigned aborts;                /* HDLC aborts */
 586         unsigned shared0s;              /* '0' bits shared between flags */
 587         unsigned stolen0s;              /* '0' stuff bits also serving as
 588                                            leading flag bits */
 589         struct tasklet_struct rcvd_tasklet;
 590 };
 591
 592 struct gigaset_ops {
 593         /* Called from ev-layer.c/interface.c for sending AT commands to the
 594            device */
 595         int (*write_cmd)(struct cardstate *cs,
 596                          const unsigned char *buf, int len,
 597                          struct tasklet_struct *wake_tasklet);
 598
 599         /* Called from interface.c for additional device control */
 600         int (*write_room)(struct cardstate *cs);
 601         int (*chars_in_buffer)(struct cardstate *cs);
 602         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 603
 604         /* Called from ev-layer.c after setting up connection
 605          * Should call gigaset_bchannel_up(), when finished. */
 606         int (*init_bchannel)(struct bc_state *bcs);
 607
 608         /* Called from ev-layer.c after hanging up
 609          * Should call gigaset_bchannel_down(), when finished. */
 610         int (*close_bchannel)(struct bc_state *bcs);
 611
 612         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 613         int (*initbcshw)(struct bc_state *bcs);
 614
 615         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 616         int (*freebcshw)(struct bc_state *bcs);
 617
 618         /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
 619         void (*reinitbcshw)(struct bc_state *bcs);
 620
 621         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 622         int (*initcshw)(struct cardstate *cs);
 623
 624         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 625         void (*freecshw)(struct cardstate *cs);
 626
 627         /* Called from common.c/interface.c for additional serial port
 628            control */
 629         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 630                               unsigned new_state);
 631         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 632         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 633
 634         /* Called from i4l.c to put an skb into the send-queue. */
 635         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 636
 637         /* Called from ev-layer.c to process a block of data
 638          * received through the common/control channel. */
 639         void (*handle_input)(struct inbuf_t *inbuf);
 640
 641 };
 642
 643 /* = Common structures and definitions ======================================= */
 644
 645 /* Parser states for DLE-Event:
 646  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 647  * <DLE_FLAG>:  0x10
 648  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 649  */
 650 #define DLE_FLAG        0x10
 651
 652 /* ===========================================================================
 653  *  Functions implemented in asyncdata.c
 654  */
 655
 656 /* Called from i4l.c to put an skb into the send-queue.
 657  * After sending gigaset_skb_sent() should be called. */
 658 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 659
 660 /* Called from ev-layer.c to process a block of data
 661  * received through the common/control channel. */
 662 void gigaset_m10x_input(struct inbuf_t *inbuf);
 663
 664 /* ===========================================================================
 665  *  Functions implemented in isocdata.c
 666  */
 667
 668 /* Called from i4l.c to put an skb into the send-queue.
 669  * After sending gigaset_skb_sent() should be called. */
 670 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 671
 672 /* Called from ev-layer.c to process a block of data
 673  * received through the common/control channel. */
 674 void gigaset_isoc_input(struct inbuf_t *inbuf);
 675
 676 /* Called from bas-gigaset.c to process a block of data
 677  * received through the isochronous channel */
 678 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 679                           struct bc_state *bcs);
 680
 681 /* Called from bas-gigaset.c to put a block of data
 682  * into the isochronous output buffer */
 683 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 684
 685 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 686 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 687
 688 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 689 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 690
 691 /* ===========================================================================
 692  *  Functions implemented in i4l.c/gigaset.h
 693  */
 694
 695 /* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
 696 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
 697
 698 /* Called from xxx-gigaset.c to indicate completion of sending an skb */
 699 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 700
 701 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 702 int gigaset_isdn_icall(struct at_state_t *at_state);
 703 int gigaset_isdn_setup_accept(struct at_state_t *at_state);
 704 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
 705
 706 void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
 707 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
 708
 709
 710 static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
 711 {
 712         isdn_ctrl response;
 713
 714         /* error -> LL */
 715         gig_dbg(DEBUG_CMD, "sending L1ERR");
 716         response.driver = bcs->cs->myid;
 717         response.command = ISDN_STAT_L1ERR;
 718         response.arg = bcs->channel;
 719         response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 720         bcs->cs->iif.statcallb(&response);
 721 }
 722
 723 /* ===========================================================================
 724  *  Functions implemented in ev-layer.c
 725  */
 726
 727 /* tasklet called from common.c to process queued events */
 728 void gigaset_handle_event(unsigned long data);
 729
 730 /* called from isocdata.c / asyncdata.c
 731  * when a complete modem response line has been received */
 732 void gigaset_handle_modem_response(struct cardstate *cs);
 733
 734 /* ===========================================================================
 735  *  Functions implemented in proc.c
 736  */
 737
 738 /* initialize sysfs for device */
 739 void gigaset_init_dev_sysfs(struct cardstate *cs);
 740 void gigaset_free_dev_sysfs(struct cardstate *cs);
 741
 742 /* ===========================================================================
 743  *  Functions implemented in common.c/gigaset.h
 744  */
 745
 746 void gigaset_bcs_reinit(struct bc_state *bcs);
 747 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 748                      struct cardstate *cs, int cid);
 749 int gigaset_get_channel(struct bc_state *bcs);
 750 void gigaset_free_channel(struct bc_state *bcs);
 751 int gigaset_get_channels(struct cardstate *cs);
 752 void gigaset_free_channels(struct cardstate *cs);
 753 void gigaset_block_channels(struct cardstate *cs);
 754
 755 /* Allocate and initialize driver structure. */
 756 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 757                                           const char *procname,
 758                                           const char *devname,
 759                                           const struct gigaset_ops *ops,
 760                                           struct module *owner);
 761
 762 /* Deallocate driver structure. */
 763 void gigaset_freedriver(struct gigaset_driver *drv);
 764 void gigaset_debugdrivers(void);
 765 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 766 struct cardstate *gigaset_get_cs_by_id(int id);
 767 void gigaset_blockdriver(struct gigaset_driver *drv);
 768
 769 /* Allocate and initialize card state. Calls hardware dependent
 770    gigaset_init[b]cs(). */
 771 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 772                                  int onechannel, int ignoreframes,
 773                                  int cidmode, const char *modulename);
 774
 775 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 776 void gigaset_freecs(struct cardstate *cs);
 777
 778 /* Tell common.c that hardware and driver are ready. */
 779 int gigaset_start(struct cardstate *cs);
 780
 781 /* Tell common.c that the device is not present any more. */
 782 void gigaset_stop(struct cardstate *cs);
 783
 784 /* Tell common.c that the driver is being unloaded. */
 785 int gigaset_shutdown(struct cardstate *cs);
 786
 787 /* Tell common.c that an skb has been sent. */
 788 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 789
 790 /* Append event to the queue.
 791  * Returns NULL on failure or a pointer to the event on success.
 792  * ptr must be kmalloc()ed (and not be freed by the caller).
 793  */
 794 struct event_t *gigaset_add_event(struct cardstate *cs,
 795                                   struct at_state_t *at_state, int type,
 796                                   void *ptr, int parameter, void *arg);
 797
 798 /* Called on CONFIG1 command from frontend. */
 799 int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
 800
 801 /* cs->lock must not be locked */
 802 static inline void gigaset_schedule_event(struct cardstate *cs)
 803 {
 804         unsigned long flags;
 805         spin_lock_irqsave(&cs->lock, flags);
 806         if (cs->running)
 807                 tasklet_schedule(&cs->event_tasklet);
 808         spin_unlock_irqrestore(&cs->lock, flags);
 809 }
 810
 811 /* Tell common.c that B channel has been closed. */
 812 /* cs->lock must not be locked */
 813 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 814 {
 815         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 816
 817         gig_dbg(DEBUG_CMD, "scheduling BC_CLOSED");
 818         gigaset_schedule_event(bcs->cs);
 819 }
 820
 821 /* Tell common.c that B channel has been opened. */
 822 /* cs->lock must not be locked */
 823 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 824 {
 825         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 826
 827         gig_dbg(DEBUG_CMD, "scheduling BC_OPEN");
 828         gigaset_schedule_event(bcs->cs);
 829 }
 830
 831 /* handling routines for sk_buff */
 832 /* ============================= */
 833
 834 /* pass received skb to LL
 835  * Warning: skb must not be accessed anymore!
 836  */
 837 static inline void gigaset_rcv_skb(struct sk_buff *skb,
 838                                    struct cardstate *cs,
 839                                    struct bc_state *bcs)
 840 {
 841         cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
 842         bcs->trans_down++;
 843 }
 844
 845 /* handle reception of corrupted skb
 846  * Warning: skb must not be accessed anymore!
 847  */
 848 static inline void gigaset_rcv_error(struct sk_buff *procskb,
 849                                      struct cardstate *cs,
 850                                      struct bc_state *bcs)
 851 {
 852         if (procskb)
 853                 dev_kfree_skb(procskb);
 854
 855         if (bcs->ignore)
 856                 --bcs->ignore;
 857         else {
 858                 ++bcs->corrupted;
 859                 gigaset_isdn_rcv_err(bcs);
 860         }
 861 }
 862
 863 /* append received bytes to inbuf */
 864 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 865                        unsigned numbytes);
 866
 867 /* ===========================================================================
 868  *  Functions implemented in interface.c
 869  */
 870
 871 /* initialize interface */
 872 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 873                            const char *devname);
 874 /* release interface */
 875 void gigaset_if_freedriver(struct gigaset_driver *drv);
 876 /* add minor */
 877 void gigaset_if_init(struct cardstate *cs);
 878 /* remove minor */
 879 void gigaset_if_free(struct cardstate *cs);
 880 /* device received data */
 881 void gigaset_if_receive(struct cardstate *cs,
 882                         unsigned char *buffer, size_t len);
 883
 884 #endif