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 #undef notice
 110
 111 #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
 112         format "\n" , ## arg)
 113 #define info(format, arg...) printk(KERN_INFO KBUILD_MODNAME ": " \
 114         format "\n" , ## arg)
 115 #define warn(format, arg...) printk(KERN_WARNING KBUILD_MODNAME ": " \
 116         format "\n" , ## arg)
 117 #define notice(format, arg...) printk(KERN_NOTICE KBUILD_MODNAME ": " \
 118         format "\n" , ## arg)
 119
 120 #ifdef CONFIG_GIGASET_DEBUG
 121
 122 #define gig_dbg(level, format, arg...) \
 123         do { \
 124                 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 125                         printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
 126                                ## arg); \
 127         } while (0)
 128 #define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 129
 130 #else
 131
 132 #define gig_dbg(level, format, arg...) do {} while (0)
 133 #define DEBUG_DEFAULT 0
 134
 135 #endif
 136
 137 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 138                         size_t len, const unsigned char *buf);
 139
 140 /* connection state */
 141 #define ZSAU_NONE                       0
 142 #define ZSAU_DISCONNECT_IND             4
 143 #define ZSAU_OUTGOING_CALL_PROCEEDING   1
 144 #define ZSAU_PROCEEDING                 1
 145 #define ZSAU_CALL_DELIVERED             2
 146 #define ZSAU_ACTIVE                     3
 147 #define ZSAU_NULL                       5
 148 #define ZSAU_DISCONNECT_REQ             6
 149 #define ZSAU_UNKNOWN                    -1
 150
 151 /* USB control transfer requests */
 152 #define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 153 #define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 154
 155 /* int-in-events 3070 */
 156 #define HD_B1_FLOW_CONTROL              0x80
 157 #define HD_B2_FLOW_CONTROL              0x81
 158 #define HD_RECEIVEATDATA_ACK            (0x35)          // 3070
 159                                                 // att: HD_RECEIVE>>AT<<DATA_ACK
 160 #define HD_READY_SEND_ATDATA            (0x36)          // 3070
 161 #define HD_OPEN_ATCHANNEL_ACK           (0x37)          // 3070
 162 #define HD_CLOSE_ATCHANNEL_ACK          (0x38)          // 3070
 163 #define HD_DEVICE_INIT_OK               (0x11)          // ISurf USB + 3070
 164 #define HD_OPEN_B1CHANNEL_ACK           (0x51)          // ISurf USB + 3070
 165 #define HD_OPEN_B2CHANNEL_ACK           (0x52)          // ISurf USB + 3070
 166 #define HD_CLOSE_B1CHANNEL_ACK          (0x53)          // ISurf USB + 3070
 167 #define HD_CLOSE_B2CHANNEL_ACK          (0x54)          // ISurf USB + 3070
 168 //       Powermangment
 169 #define HD_SUSPEND_END                  (0x61)          // ISurf USB
 170 //   Configuration
 171 #define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          // ISurf USB + 3070
 172
 173 /* control requests 3070 */
 174 #define HD_OPEN_B1CHANNEL               (0x23)          // ISurf USB + 3070
 175 #define HD_CLOSE_B1CHANNEL              (0x24)          // ISurf USB + 3070
 176 #define HD_OPEN_B2CHANNEL               (0x25)          // ISurf USB + 3070
 177 #define HD_CLOSE_B2CHANNEL              (0x26)          // ISurf USB + 3070
 178 #define HD_RESET_INTERRUPT_PIPE         (0x27)          // ISurf USB + 3070
 179 #define HD_DEVICE_INIT_ACK              (0x34)          // ISurf USB + 3070
 180 #define HD_WRITE_ATMESSAGE              (0x12)          // 3070
 181 #define HD_READ_ATMESSAGE               (0x13)          // 3070
 182 #define HD_OPEN_ATCHANNEL               (0x28)          // 3070
 183 #define HD_CLOSE_ATCHANNEL              (0x29)          // 3070
 184
 185 /* number of B channels supported by base driver */
 186 #define BAS_CHANNELS    2
 187
 188 /* USB frames for isochronous transfer */
 189 #define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 190 #define BAS_NUMFRAMES   8       /* number of frames per URB */
 191 #define BAS_MAXFRAME    16      /* allocated bytes per frame */
 192 #define BAS_NORMFRAME   8       /* send size without flow control */
 193 #define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 194 #define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 195 #define BAS_CORRFRAMES  4       /* flow control multiplicator */
 196
 197 #define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 198                                         /* size of isoc in buf per URB */
 199 #define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 200 #define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 201
 202 #define BAS_INURBS      3
 203 #define BAS_OUTURBS     3
 204
 205 /* variable commands in struct bc_state */
 206 #define AT_ISO          0
 207 #define AT_DIAL         1
 208 #define AT_MSN          2
 209 #define AT_BC           3
 210 #define AT_PROTO        4
 211 #define AT_TYPE         5
 212 #define AT_HLC          6
 213 #define AT_NUM          7
 214
 215 /* variables in struct at_state_t */
 216 #define VAR_ZSAU        0
 217 #define VAR_ZDLE        1
 218 #define VAR_ZVLS        2
 219 #define VAR_ZCTP        3
 220 #define VAR_NUM         4
 221
 222 #define STR_NMBR        0
 223 #define STR_ZCPN        1
 224 #define STR_ZCON        2
 225 #define STR_ZBC         3
 226 #define STR_ZHLC        4
 227 #define STR_NUM         5
 228
 229 #define EV_TIMEOUT      -105
 230 #define EV_IF_VER       -106
 231 #define EV_PROC_CIDMODE -107
 232 #define EV_SHUTDOWN     -108
 233 #define EV_START        -110
 234 #define EV_STOP         -111
 235 #define EV_IF_LOCK      -112
 236 #define EV_PROTO_L2     -113
 237 #define EV_ACCEPT       -114
 238 #define EV_DIAL         -115
 239 #define EV_HUP          -116
 240 #define EV_BC_OPEN      -117
 241 #define EV_BC_CLOSED    -118
 242
 243 /* input state */
 244 #define INS_command     0x0001
 245 #define INS_DLE_char    0x0002
 246 #define INS_byte_stuff  0x0004
 247 #define INS_have_data   0x0008
 248 #define INS_skip_frame  0x0010
 249 #define INS_DLE_command 0x0020
 250 #define INS_flag_hunt   0x0040
 251
 252 /* channel state */
 253 #define CHS_D_UP        0x01
 254 #define CHS_B_UP        0x02
 255 #define CHS_NOTIFY_LL   0x04
 256
 257 #define ICALL_REJECT    0
 258 #define ICALL_ACCEPT    1
 259 #define ICALL_IGNORE    2
 260
 261 /* device state */
 262 #define MS_UNINITIALIZED        0
 263 #define MS_INIT                 1
 264 #define MS_LOCKED               2
 265 #define MS_SHUTDOWN             3
 266 #define MS_RECOVER              4
 267 #define MS_READY                5
 268
 269 /* mode */
 270 #define M_UNKNOWN       0
 271 #define M_CONFIG        1
 272 #define M_UNIMODEM      2
 273 #define M_CID           3
 274
 275 /* start mode */
 276 #define SM_LOCKED       0
 277 #define SM_ISDN         1 /* default */
 278
 279 struct gigaset_ops;
 280 struct gigaset_driver;
 281
 282 struct usb_cardstate;
 283 struct ser_cardstate;
 284 struct bas_cardstate;
 285
 286 struct bc_state;
 287 struct usb_bc_state;
 288 struct ser_bc_state;
 289 struct bas_bc_state;
 290
 291 struct reply_t {
 292         int     resp_code;      /* RSP_XXXX */
 293         int     min_ConState;   /* <0 => ignore */
 294         int     max_ConState;   /* <0 => ignore */
 295         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 296         int     new_ConState;   /* <0 => ignore */
 297         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 298         int     action[MAXACT]; /* ACT_XXXX */
 299         char    *command;       /* NULL==none */
 300 };
 301
 302 extern struct reply_t gigaset_tab_cid_m10x[];
 303 extern struct reply_t gigaset_tab_nocid_m10x[];
 304
 305 struct inbuf_t {
 306         unsigned char           *rcvbuf;        /* usb-gigaset receive buffer */
 307         struct bc_state         *bcs;
 308         struct cardstate        *cs;
 309         int                     inputstate;
 310         int                     head, tail;
 311         unsigned char           data[RBUFSIZE];
 312 };
 313
 314 /* isochronous write buffer structure
 315  * circular buffer with pad area for extraction of complete USB frames
 316  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 317  * - data[nextread..write-1] is valid data yet to be sent
 318  * - data[write] is the next byte to write to
 319  *   - in byte-oriented L2 procotols, it is completely free
 320  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 321  * - data[write+1..read-1] is free
 322  * - wbits is the number of valid data bits in data[write], starting at the LSB
 323  * - writesem is the semaphore for writing to the buffer:
 324  *   if writesem <= 0, data[write..read-1] is currently being written to
 325  * - idle contains the byte value to repeat when the end of valid data is
 326  *   reached; if nextread==write (buffer contains no data to send), either the
 327  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 328  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 329  *   are also filled with that value
 330  */
 331 struct isowbuf_t {
 332         int             read;
 333         int             nextread;
 334         int             write;
 335         atomic_t        writesem;
 336         int             wbits;
 337         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 338         unsigned char   idle;
 339 };
 340
 341 /* isochronous write URB context structure
 342  * data to be stored along with the URB and retrieved when it is returned
 343  * as completed by the USB subsystem
 344  * - urb: pointer to the URB itself
 345  * - bcs: pointer to the B Channel control structure
 346  * - limit: end of write buffer area covered by this URB
 347  * - status: URB completion status
 348  */
 349 struct isow_urbctx_t {
 350         struct urb *urb;
 351         struct bc_state *bcs;
 352         int limit;
 353         int status;
 354 };
 355
 356 /* AT state structure
 357  * data associated with the state of an ISDN connection, whether or not
 358  * it is currently assigned a B channel
 359  */
 360 struct at_state_t {
 361         struct list_head        list;
 362         int                     waiting;
 363         int                     getstring;
 364         unsigned                timer_index;
 365         unsigned long           timer_expires;
 366         int                     timer_active;
 367         unsigned int            ConState;       /* State of connection */
 368         struct reply_t          *replystruct;
 369         int                     cid;
 370         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 371         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 372         unsigned                pending_commands;       /* see PC_XXXX */
 373         unsigned                seq_index;
 374
 375         struct cardstate        *cs;
 376         struct bc_state         *bcs;
 377 };
 378
 379 struct resp_type_t {
 380         unsigned char   *response;
 381         int             resp_code;      /* RSP_XXXX */
 382         int             type;           /* RT_XXXX */
 383 };
 384
 385 struct event_t {
 386         int type;
 387         void *ptr, *arg;
 388         int parameter;
 389         int cid;
 390         struct at_state_t *at_state;
 391 };
 392
 393 /* This buffer holds all information about the used B-Channel */
 394 struct bc_state {
 395         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 396         struct sk_buff_head squeue;     /* B-Channel send Queue */
 397
 398         /* Variables for debugging .. */
 399         int corrupted;                  /* Counter for corrupted packages */
 400         int trans_down;                 /* Counter of packages (downstream) */
 401         int trans_up;                   /* Counter of packages (upstream) */
 402
 403         struct at_state_t at_state;
 404         unsigned long rcvbytes;
 405
 406         __u16 fcs;
 407         struct sk_buff *skb;
 408         int inputstate;                 /* see INS_XXXX */
 409
 410         int channel;
 411
 412         struct cardstate *cs;
 413
 414         unsigned chstate;               /* bitmap (CHS_*) */
 415         int ignore;
 416         unsigned proto2;                /* Layer 2 protocol (ISDN_PROTO_L2_*) */
 417         char *commands[AT_NUM];         /* see AT_XXXX */
 418
 419 #ifdef CONFIG_GIGASET_DEBUG
 420         int emptycount;
 421 #endif
 422         int busy;
 423         int use_count;
 424
 425         /* private data of hardware drivers */
 426         union {
 427                 struct ser_bc_state *ser;       /* serial hardware driver */
 428                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 429                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 430         } hw;
 431 };
 432
 433 struct cardstate {
 434         struct gigaset_driver *driver;
 435         unsigned minor_index;
 436         struct device *dev;
 437         struct device *tty_dev;
 438         unsigned flags;
 439
 440         const struct gigaset_ops *ops;
 441
 442         /* Stuff to handle communication */
 443         wait_queue_head_t waitqueue;
 444         int waiting;
 445         int mode;                       /* see M_XXXX */
 446         int mstate;                     /* Modem state: see MS_XXXX */
 447                                         /* only changed by the event layer */
 448         int cmd_result;
 449
 450         int channels;
 451         struct bc_state *bcs;           /* Array of struct bc_state */
 452
 453         int onechannel;                 /* data and commands transmitted in one
 454                                            stream (M10x) */
 455
 456         spinlock_t lock;
 457         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 458         struct list_head temp_at_states;/* list of temporary "struct
 459                                            at_state_t"s without B channel */
 460
 461         struct inbuf_t *inbuf;
 462
 463         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 464         spinlock_t cmdlock;
 465         unsigned curlen, cmdbytes;
 466
 467         unsigned open_count;
 468         struct tty_struct *tty;
 469         struct tasklet_struct if_wake_tasklet;
 470         unsigned control_state;
 471
 472         unsigned fwver[4];
 473         int gotfwver;
 474
 475         unsigned running;               /* !=0 if events are handled */
 476         unsigned connected;             /* !=0 if hardware is connected */
 477         unsigned isdn_up;               /* !=0 after ISDN_STAT_RUN */
 478
 479         unsigned cidmode;
 480
 481         int myid;                       /* id for communication with LL */
 482         isdn_if iif;
 483
 484         struct reply_t *tabnocid;
 485         struct reply_t *tabcid;
 486         int cs_init;
 487         int ignoreframes;               /* frames to ignore after setting up the
 488                                            B channel */
 489         struct mutex mutex;             /* locks this structure:
 490                                          *   connected is not changed,
 491                                          *   hardware_up is not changed,
 492                                          *   MState is not changed to or from
 493                                          *   MS_LOCKED */
 494
 495         struct timer_list timer;
 496         int retry_count;
 497         int dle;                        /* !=0 if modem commands/responses are
 498                                            dle encoded */
 499         int cur_at_seq;                 /* sequence of AT commands being
 500                                            processed */
 501         int curchannel;                 /* channel those commands are meant
 502                                            for */
 503         int commands_pending;           /* flag(s) in xxx.commands_pending have
 504                                            been set */
 505         struct tasklet_struct event_tasklet;
 506                                         /* tasklet for serializing AT commands.
 507                                          * Scheduled
 508                                          *   -> for modem reponses (and
 509                                          *      incoming data for M10x)
 510                                          *   -> on timeout
 511                                          *   -> after setting bits in
 512                                          *      xxx.at_state.pending_command
 513                                          *      (e.g. command from LL) */
 514         struct tasklet_struct write_tasklet;
 515                                         /* tasklet for serial output
 516                                          * (not used in base driver) */
 517
 518         /* event queue */
 519         struct event_t events[MAX_EVENTS];
 520         unsigned ev_tail, ev_head;
 521         spinlock_t ev_lock;
 522
 523         /* current modem response */
 524         unsigned char respdata[MAX_RESP_SIZE];
 525         unsigned cbytes;
 526
 527         /* private data of hardware drivers */
 528         union {
 529                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 530                 struct ser_cardstate *ser; /* serial hardware driver */
 531                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 532         } hw;
 533 };
 534
 535 struct gigaset_driver {
 536         struct list_head list;
 537         spinlock_t lock;                /* locks minor tables and blocked */
 538         struct tty_driver *tty;
 539         unsigned have_tty;
 540         unsigned minor;
 541         unsigned minors;
 542         struct cardstate *cs;
 543         int blocked;
 544
 545         const struct gigaset_ops *ops;
 546         struct module *owner;
 547 };
 548
 549 struct cmdbuf_t {
 550         struct cmdbuf_t *next, *prev;
 551         int len, offset;
 552         struct tasklet_struct *wake_tasklet;
 553         unsigned char buf[0];
 554 };
 555
 556 struct bas_bc_state {
 557         /* isochronous output state */
 558         int             running;
 559         atomic_t        corrbytes;
 560         spinlock_t      isooutlock;
 561         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 562         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 563         struct isowbuf_t        *isooutbuf;
 564         unsigned numsub;                /* submitted URB counter
 565                                            (for diagnostic messages only) */
 566         struct tasklet_struct   sent_tasklet;
 567
 568         /* isochronous input state */
 569         spinlock_t isoinlock;
 570         struct urb *isoinurbs[BAS_INURBS];
 571         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 572         struct urb *isoindone;          /* completed isoc read URB */
 573         int isoinstatus;                /* status of completed URB */
 574         int loststatus;                 /* status of dropped URB */
 575         unsigned isoinlost;             /* number of bytes lost */
 576         /* state of bit unstuffing algorithm
 577            (in addition to BC_state.inputstate) */
 578         unsigned seqlen;                /* number of '1' bits not yet
 579                                            unstuffed */
 580         unsigned inbyte, inbits;        /* collected bits for next byte */
 581         /* statistics */
 582         unsigned goodbytes;             /* bytes correctly received */
 583         unsigned alignerrs;             /* frames with incomplete byte at end */
 584         unsigned fcserrs;               /* FCS errors */
 585         unsigned frameerrs;             /* framing errors */
 586         unsigned giants;                /* long frames */
 587         unsigned runts;                 /* short frames */
 588         unsigned aborts;                /* HDLC aborts */
 589         unsigned shared0s;              /* '0' bits shared between flags */
 590         unsigned stolen0s;              /* '0' stuff bits also serving as
 591                                            leading flag bits */
 592         struct tasklet_struct rcvd_tasklet;
 593 };
 594
 595 struct gigaset_ops {
 596         /* Called from ev-layer.c/interface.c for sending AT commands to the
 597            device */
 598         int (*write_cmd)(struct cardstate *cs,
 599                          const unsigned char *buf, int len,
 600                          struct tasklet_struct *wake_tasklet);
 601
 602         /* Called from interface.c for additional device control */
 603         int (*write_room)(struct cardstate *cs);
 604         int (*chars_in_buffer)(struct cardstate *cs);
 605         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 606
 607         /* Called from ev-layer.c after setting up connection
 608          * Should call gigaset_bchannel_up(), when finished. */
 609         int (*init_bchannel)(struct bc_state *bcs);
 610
 611         /* Called from ev-layer.c after hanging up
 612          * Should call gigaset_bchannel_down(), when finished. */
 613         int (*close_bchannel)(struct bc_state *bcs);
 614
 615         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 616         int (*initbcshw)(struct bc_state *bcs);
 617
 618         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 619         int (*freebcshw)(struct bc_state *bcs);
 620
 621         /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
 622         void (*reinitbcshw)(struct bc_state *bcs);
 623
 624         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 625         int (*initcshw)(struct cardstate *cs);
 626
 627         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 628         void (*freecshw)(struct cardstate *cs);
 629
 630         /* Called from common.c/interface.c for additional serial port
 631            control */
 632         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 633                               unsigned new_state);
 634         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 635         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 636
 637         /* Called from i4l.c to put an skb into the send-queue. */
 638         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 639
 640         /* Called from ev-layer.c to process a block of data
 641          * received through the common/control channel. */
 642         void (*handle_input)(struct inbuf_t *inbuf);
 643
 644 };
 645
 646 /* = Common structures and definitions ======================================= */
 647
 648 /* Parser states for DLE-Event:
 649  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 650  * <DLE_FLAG>:  0x10
 651  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 652  */
 653 #define DLE_FLAG        0x10
 654
 655 /* ===========================================================================
 656  *  Functions implemented in asyncdata.c
 657  */
 658
 659 /* Called from i4l.c to put an skb into the send-queue.
 660  * After sending gigaset_skb_sent() should be called. */
 661 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 662
 663 /* Called from ev-layer.c to process a block of data
 664  * received through the common/control channel. */
 665 void gigaset_m10x_input(struct inbuf_t *inbuf);
 666
 667 /* ===========================================================================
 668  *  Functions implemented in isocdata.c
 669  */
 670
 671 /* Called from i4l.c to put an skb into the send-queue.
 672  * After sending gigaset_skb_sent() should be called. */
 673 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 674
 675 /* Called from ev-layer.c to process a block of data
 676  * received through the common/control channel. */
 677 void gigaset_isoc_input(struct inbuf_t *inbuf);
 678
 679 /* Called from bas-gigaset.c to process a block of data
 680  * received through the isochronous channel */
 681 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 682                           struct bc_state *bcs);
 683
 684 /* Called from bas-gigaset.c to put a block of data
 685  * into the isochronous output buffer */
 686 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 687
 688 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 689 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 690
 691 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 692 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 693
 694 /* ===========================================================================
 695  *  Functions implemented in i4l.c/gigaset.h
 696  */
 697
 698 /* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
 699 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
 700
 701 /* Called from xxx-gigaset.c to indicate completion of sending an skb */
 702 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 703
 704 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 705 int gigaset_isdn_icall(struct at_state_t *at_state);
 706 int gigaset_isdn_setup_accept(struct at_state_t *at_state);
 707 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
 708
 709 void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
 710 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
 711
 712
 713 static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
 714 {
 715         isdn_ctrl response;
 716
 717         /* error -> LL */
 718         gig_dbg(DEBUG_CMD, "sending L1ERR");
 719         response.driver = bcs->cs->myid;
 720         response.command = ISDN_STAT_L1ERR;
 721         response.arg = bcs->channel;
 722         response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 723         bcs->cs->iif.statcallb(&response);
 724 }
 725
 726 /* ===========================================================================
 727  *  Functions implemented in ev-layer.c
 728  */
 729
 730 /* tasklet called from common.c to process queued events */
 731 void gigaset_handle_event(unsigned long data);
 732
 733 /* called from isocdata.c / asyncdata.c
 734  * when a complete modem response line has been received */
 735 void gigaset_handle_modem_response(struct cardstate *cs);
 736
 737 /* ===========================================================================
 738  *  Functions implemented in proc.c
 739  */
 740
 741 /* initialize sysfs for device */
 742 void gigaset_init_dev_sysfs(struct cardstate *cs);
 743 void gigaset_free_dev_sysfs(struct cardstate *cs);
 744
 745 /* ===========================================================================
 746  *  Functions implemented in common.c/gigaset.h
 747  */
 748
 749 void gigaset_bcs_reinit(struct bc_state *bcs);
 750 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 751                      struct cardstate *cs, int cid);
 752 int gigaset_get_channel(struct bc_state *bcs);
 753 void gigaset_free_channel(struct bc_state *bcs);
 754 int gigaset_get_channels(struct cardstate *cs);
 755 void gigaset_free_channels(struct cardstate *cs);
 756 void gigaset_block_channels(struct cardstate *cs);
 757
 758 /* Allocate and initialize driver structure. */
 759 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 760                                           const char *procname,
 761                                           const char *devname,
 762                                           const struct gigaset_ops *ops,
 763                                           struct module *owner);
 764
 765 /* Deallocate driver structure. */
 766 void gigaset_freedriver(struct gigaset_driver *drv);
 767 void gigaset_debugdrivers(void);
 768 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 769 struct cardstate *gigaset_get_cs_by_id(int id);
 770 void gigaset_blockdriver(struct gigaset_driver *drv);
 771
 772 /* Allocate and initialize card state. Calls hardware dependent
 773    gigaset_init[b]cs(). */
 774 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 775                                  int onechannel, int ignoreframes,
 776                                  int cidmode, const char *modulename);
 777
 778 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 779 void gigaset_freecs(struct cardstate *cs);
 780
 781 /* Tell common.c that hardware and driver are ready. */
 782 int gigaset_start(struct cardstate *cs);
 783
 784 /* Tell common.c that the device is not present any more. */
 785 void gigaset_stop(struct cardstate *cs);
 786
 787 /* Tell common.c that the driver is being unloaded. */
 788 int gigaset_shutdown(struct cardstate *cs);
 789
 790 /* Tell common.c that an skb has been sent. */
 791 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 792
 793 /* Append event to the queue.
 794  * Returns NULL on failure or a pointer to the event on success.
 795  * ptr must be kmalloc()ed (and not be freed by the caller).
 796  */
 797 struct event_t *gigaset_add_event(struct cardstate *cs,
 798                                   struct at_state_t *at_state, int type,
 799                                   void *ptr, int parameter, void *arg);
 800
 801 /* Called on CONFIG1 command from frontend. */
 802 int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
 803
 804 /* cs->lock must not be locked */
 805 static inline void gigaset_schedule_event(struct cardstate *cs)
 806 {
 807         unsigned long flags;
 808         spin_lock_irqsave(&cs->lock, flags);
 809         if (cs->running)
 810                 tasklet_schedule(&cs->event_tasklet);
 811         spin_unlock_irqrestore(&cs->lock, flags);
 812 }
 813
 814 /* Tell common.c that B channel has been closed. */
 815 /* cs->lock must not be locked */
 816 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 817 {
 818         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 819
 820         gig_dbg(DEBUG_CMD, "scheduling BC_CLOSED");
 821         gigaset_schedule_event(bcs->cs);
 822 }
 823
 824 /* Tell common.c that B channel has been opened. */
 825 /* cs->lock must not be locked */
 826 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 827 {
 828         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 829
 830         gig_dbg(DEBUG_CMD, "scheduling BC_OPEN");
 831         gigaset_schedule_event(bcs->cs);
 832 }
 833
 834 /* handling routines for sk_buff */
 835 /* ============================= */
 836
 837 /* pass received skb to LL
 838  * Warning: skb must not be accessed anymore!
 839  */
 840 static inline void gigaset_rcv_skb(struct sk_buff *skb,
 841                                    struct cardstate *cs,
 842                                    struct bc_state *bcs)
 843 {
 844         cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
 845         bcs->trans_down++;
 846 }
 847
 848 /* handle reception of corrupted skb
 849  * Warning: skb must not be accessed anymore!
 850  */
 851 static inline void gigaset_rcv_error(struct sk_buff *procskb,
 852                                      struct cardstate *cs,
 853                                      struct bc_state *bcs)
 854 {
 855         if (procskb)
 856                 dev_kfree_skb(procskb);
 857
 858         if (bcs->ignore)
 859                 --bcs->ignore;
 860         else {
 861                 ++bcs->corrupted;
 862                 gigaset_isdn_rcv_err(bcs);
 863         }
 864 }
 865
 866 /* append received bytes to inbuf */
 867 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 868                        unsigned numbytes);
 869
 870 /* ===========================================================================
 871  *  Functions implemented in interface.c
 872  */
 873
 874 /* initialize interface */
 875 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 876                            const char *devname);
 877 /* release interface */
 878 void gigaset_if_freedriver(struct gigaset_driver *drv);
 879 /* add minor */
 880 void gigaset_if_init(struct cardstate *cs);
 881 /* remove minor */
 882 void gigaset_if_free(struct cardstate *cs);
 883 /* device received data */
 884 void gigaset_if_receive(struct cardstate *cs,
 885                         unsigned char *buffer, size_t len);
 886
 887 #endif