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/config.h>
  20 #include <linux/kernel.h>
  21 #include <linux/compiler.h>
  22 #include <linux/types.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/isdnif.h>
  25 #include <linux/usb.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/ppp_defs.h>
  29 #include <linux/timer.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/tty.h>
  32 #include <linux/tty_driver.h>
  33 #include <linux/list.h>
  34 #include <asm/atomic.h>
  35
  36 #define GIG_VERSION {0,5,0,0}
  37 #define GIG_COMPAT  {0,4,0,0}
  38
  39 #define MAX_REC_PARAMS 10       /* Max. number of params in response string */
  40 #define MAX_RESP_SIZE 512       /* Max. size of a response string */
  41 #define HW_HDR_LEN 2            /* Header size used to store ack info */
  42
  43 #define MAX_EVENTS 64           /* size of event queue */
  44
  45 #define RBUFSIZE 8192
  46 #define SBUFSIZE 4096           /* sk_buff payload size */
  47
  48 #define TRANSBUFSIZE 768        /* bytes per skb for transparent receive */
  49 #define MAX_BUF_SIZE (SBUFSIZE - 2)     /* Max. size of a data packet from LL */
  50
  51 /* compile time options */
  52 #define GIG_MAJOR 0
  53
  54 #define GIG_MAYINITONDIAL
  55 #define GIG_RETRYCID
  56 #define GIG_X75
  57
  58 #define GIG_TICK 100            /* in milliseconds */
  59
  60 /* timeout values (unit: 1 sec) */
  61 #define INIT_TIMEOUT 1
  62
  63 /* timeout values (unit: 0.1 sec) */
  64 #define RING_TIMEOUT 3          /* for additional parameters to RING */
  65 #define BAS_TIMEOUT 20          /* for response to Base USB ops */
  66 #define ATRDY_TIMEOUT 3         /* for HD_READY_SEND_ATDATA */
  67
  68 #define BAS_RETRY 3             /* max. retries for base USB ops */
  69
  70 #define MAXACT 3
  71
  72 extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
  73
  74 /* any combination of these can be given with the 'debug=' parameter to insmod,
  75  * e.g. 'insmod usb_gigaset.o debug=0x2c' will set DEBUG_OPEN, DEBUG_CMD and
  76  * DEBUG_INTR.
  77  */
  78 enum debuglevel {
  79         DEBUG_REG         = 0x0002, /* serial port I/O register operations */
  80         DEBUG_OPEN        = 0x0004, /* open/close serial port */
  81         DEBUG_INTR        = 0x0008, /* interrupt processing */
  82         DEBUG_INTR_DUMP   = 0x0010, /* Activating hexdump debug output on
  83                                        interrupt requests, not available as
  84                                        run-time option */
  85         DEBUG_CMD         = 0x00020, /* sent/received LL commands */
  86         DEBUG_STREAM      = 0x00040, /* application data stream I/O events */
  87         DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
  88         DEBUG_LLDATA      = 0x00100, /* sent/received LL data */
  89         DEBUG_INTR_0      = 0x00200, /* serial port interrupt processing */
  90         DEBUG_DRIVER      = 0x00400, /* driver structure */
  91         DEBUG_HDLC        = 0x00800, /* M10x HDLC processing */
  92         DEBUG_WRITE       = 0x01000, /* M105 data write */
  93         DEBUG_TRANSCMD    = 0x02000, /* AT-COMMANDS+RESPONSES */
  94         DEBUG_MCMD        = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
  95         DEBUG_INIT        = 0x08000, /* (de)allocation+initialization of data
  96                                         structures */
  97         DEBUG_LOCK        = 0x10000, /* semaphore operations */
  98         DEBUG_OUTPUT      = 0x20000, /* output to device */
  99         DEBUG_ISO         = 0x40000, /* isochronous transfers */
 100         DEBUG_IF          = 0x80000, /* character device operations */
 101         DEBUG_USBREQ      = 0x100000, /* USB communication (except payload
 102                                          data) */
 103         DEBUG_LOCKCMD     = 0x200000, /* AT commands and responses when
 104                                          MS_LOCKED */
 105
 106         DEBUG_ANY         = 0x3fffff, /* print message if any of the others is
 107                                          activated */
 108 };
 109
 110 /* missing from linux/device.h ... */
 111 #ifndef dev_notice
 112 #define dev_notice(dev, format, arg...)         \
 113         dev_printk(KERN_NOTICE , dev , format , ## arg)
 114 #endif
 115
 116 /* Kernel message macros for situations where dev_printk and friends cannot be
 117  * used for lack of reliable access to a device structure.
 118  * linux/usb.h already contains these but in an obsolete form which clutters
 119  * the log needlessly, and according to the USB maintainer those should be
 120  * removed rather than fixed anyway.
 121  */
 122 #undef err
 123 #undef info
 124 #undef warn
 125 #undef notice
 126
 127 #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
 128         format "\n" , ## arg)
 129 #define info(format, arg...) printk(KERN_INFO KBUILD_MODNAME ": " \
 130         format "\n" , ## arg)
 131 #define warn(format, arg...) printk(KERN_WARNING KBUILD_MODNAME ": " \
 132         format "\n" , ## arg)
 133 #define notice(format, arg...) printk(KERN_NOTICE KBUILD_MODNAME ": " \
 134         format "\n" , ## arg)
 135
 136 #ifdef CONFIG_GIGASET_DEBUG
 137
 138 #define gig_dbg(level, format, arg...) \
 139         do { \
 140                 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 141                         printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
 142                                ## arg); \
 143         } while (0)
 144 #define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 145
 146 #else
 147
 148 #define gig_dbg(level, format, arg...) do {} while (0)
 149 #define DEBUG_DEFAULT 0
 150
 151 #endif
 152
 153 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 154                         size_t len, const unsigned char *buf);
 155
 156 /* connection state */
 157 #define ZSAU_NONE                       0
 158 #define ZSAU_DISCONNECT_IND             4
 159 #define ZSAU_OUTGOING_CALL_PROCEEDING   1
 160 #define ZSAU_PROCEEDING                 1
 161 #define ZSAU_CALL_DELIVERED             2
 162 #define ZSAU_ACTIVE                     3
 163 #define ZSAU_NULL                       5
 164 #define ZSAU_DISCONNECT_REQ             6
 165 #define ZSAU_UNKNOWN                    -1
 166
 167 /* USB control transfer requests */
 168 #define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 169 #define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 170
 171 /* int-in-events 3070 */
 172 #define HD_B1_FLOW_CONTROL              0x80
 173 #define HD_B2_FLOW_CONTROL              0x81
 174 #define HD_RECEIVEATDATA_ACK            (0x35)          // 3070
 175                                                 // att: HD_RECEIVE>>AT<<DATA_ACK
 176 #define HD_READY_SEND_ATDATA            (0x36)          // 3070
 177 #define HD_OPEN_ATCHANNEL_ACK           (0x37)          // 3070
 178 #define HD_CLOSE_ATCHANNEL_ACK          (0x38)          // 3070
 179 #define HD_DEVICE_INIT_OK               (0x11)          // ISurf USB + 3070
 180 #define HD_OPEN_B1CHANNEL_ACK           (0x51)          // ISurf USB + 3070
 181 #define HD_OPEN_B2CHANNEL_ACK           (0x52)          // ISurf USB + 3070
 182 #define HD_CLOSE_B1CHANNEL_ACK          (0x53)          // ISurf USB + 3070
 183 #define HD_CLOSE_B2CHANNEL_ACK          (0x54)          // ISurf USB + 3070
 184 //       Powermangment
 185 #define HD_SUSPEND_END                  (0x61)          // ISurf USB
 186 //   Configuration
 187 #define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          // ISurf USB + 3070
 188
 189 /* control requests 3070 */
 190 #define HD_OPEN_B1CHANNEL               (0x23)          // ISurf USB + 3070
 191 #define HD_CLOSE_B1CHANNEL              (0x24)          // ISurf USB + 3070
 192 #define HD_OPEN_B2CHANNEL               (0x25)          // ISurf USB + 3070
 193 #define HD_CLOSE_B2CHANNEL              (0x26)          // ISurf USB + 3070
 194 #define HD_RESET_INTERRUPT_PIPE         (0x27)          // ISurf USB + 3070
 195 #define HD_DEVICE_INIT_ACK              (0x34)          // ISurf USB + 3070
 196 #define HD_WRITE_ATMESSAGE              (0x12)          // 3070
 197 #define HD_READ_ATMESSAGE               (0x13)          // 3070
 198 #define HD_OPEN_ATCHANNEL               (0x28)          // 3070
 199 #define HD_CLOSE_ATCHANNEL              (0x29)          // 3070
 200
 201 /* USB frames for isochronous transfer */
 202 #define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 203 #define BAS_NUMFRAMES   8       /* number of frames per URB */
 204 #define BAS_MAXFRAME    16      /* allocated bytes per frame */
 205 #define BAS_NORMFRAME   8       /* send size without flow control */
 206 #define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 207 #define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 208 #define BAS_CORRFRAMES  4       /* flow control multiplicator */
 209
 210 #define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 211                                         /* size of isoc in buf per URB */
 212 #define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 213 #define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 214
 215 #define BAS_INURBS      3
 216 #define BAS_OUTURBS     3
 217
 218 /* variable commands in struct bc_state */
 219 #define AT_ISO          0
 220 #define AT_DIAL         1
 221 #define AT_MSN          2
 222 #define AT_BC           3
 223 #define AT_PROTO        4
 224 #define AT_TYPE         5
 225 #define AT_HLC          6
 226 #define AT_NUM          7
 227
 228 /* variables in struct at_state_t */
 229 #define VAR_ZSAU        0
 230 #define VAR_ZDLE        1
 231 #define VAR_ZVLS        2
 232 #define VAR_ZCTP        3
 233 #define VAR_NUM         4
 234
 235 #define STR_NMBR        0
 236 #define STR_ZCPN        1
 237 #define STR_ZCON        2
 238 #define STR_ZBC         3
 239 #define STR_ZHLC        4
 240 #define STR_NUM         5
 241
 242 #define EV_TIMEOUT      -105
 243 #define EV_IF_VER       -106
 244 #define EV_PROC_CIDMODE -107
 245 #define EV_SHUTDOWN     -108
 246 #define EV_START        -110
 247 #define EV_STOP         -111
 248 #define EV_IF_LOCK      -112
 249 #define EV_PROTO_L2     -113
 250 #define EV_ACCEPT       -114
 251 #define EV_DIAL         -115
 252 #define EV_HUP          -116
 253 #define EV_BC_OPEN      -117
 254 #define EV_BC_CLOSED    -118
 255
 256 /* input state */
 257 #define INS_command     0x0001
 258 #define INS_DLE_char    0x0002
 259 #define INS_byte_stuff  0x0004
 260 #define INS_have_data   0x0008
 261 #define INS_skip_frame  0x0010
 262 #define INS_DLE_command 0x0020
 263 #define INS_flag_hunt   0x0040
 264
 265 /* channel state */
 266 #define CHS_D_UP        0x01
 267 #define CHS_B_UP        0x02
 268 #define CHS_NOTIFY_LL   0x04
 269
 270 #define ICALL_REJECT    0
 271 #define ICALL_ACCEPT    1
 272 #define ICALL_IGNORE    2
 273
 274 /* device state */
 275 #define MS_UNINITIALIZED        0
 276 #define MS_INIT                 1
 277 #define MS_LOCKED               2
 278 #define MS_SHUTDOWN             3
 279 #define MS_RECOVER              4
 280 #define MS_READY                5
 281
 282 /* mode */
 283 #define M_UNKNOWN       0
 284 #define M_CONFIG        1
 285 #define M_UNIMODEM      2
 286 #define M_CID           3
 287
 288 /* start mode */
 289 #define SM_LOCKED       0
 290 #define SM_ISDN         1 /* default */
 291
 292 struct gigaset_ops;
 293 struct gigaset_driver;
 294
 295 struct usb_cardstate;
 296 struct ser_cardstate;
 297 struct bas_cardstate;
 298
 299 struct bc_state;
 300 struct usb_bc_state;
 301 struct ser_bc_state;
 302 struct bas_bc_state;
 303
 304 struct reply_t {
 305         int     resp_code;      /* RSP_XXXX */
 306         int     min_ConState;   /* <0 => ignore */
 307         int     max_ConState;   /* <0 => ignore */
 308         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 309         int     new_ConState;   /* <0 => ignore */
 310         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 311         int     action[MAXACT]; /* ACT_XXXX */
 312         char    *command;       /* NULL==none */
 313 };
 314
 315 extern struct reply_t gigaset_tab_cid_m10x[];
 316 extern struct reply_t gigaset_tab_nocid_m10x[];
 317
 318 struct inbuf_t {
 319         unsigned char           *rcvbuf;        /* usb-gigaset receive buffer */
 320         struct bc_state         *bcs;
 321         struct cardstate        *cs;
 322         int                     inputstate;
 323         atomic_t                head, tail;
 324         unsigned char           data[RBUFSIZE];
 325 };
 326
 327 /* isochronous write buffer structure
 328  * circular buffer with pad area for extraction of complete USB frames
 329  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 330  * - data[nextread..write-1] is valid data yet to be sent
 331  * - data[write] is the next byte to write to
 332  *   - in byte-oriented L2 procotols, it is completely free
 333  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 334  * - data[write+1..read-1] is free
 335  * - wbits is the number of valid data bits in data[write], starting at the LSB
 336  * - writesem is the semaphore for writing to the buffer:
 337  *   if writesem <= 0, data[write..read-1] is currently being written to
 338  * - idle contains the byte value to repeat when the end of valid data is
 339  *   reached; if nextread==write (buffer contains no data to send), either the
 340  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 341  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 342  *   are also filled with that value
 343  */
 344 struct isowbuf_t {
 345         atomic_t        read;
 346         atomic_t        nextread;
 347         atomic_t        write;
 348         atomic_t        writesem;
 349         int             wbits;
 350         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 351         unsigned char   idle;
 352 };
 353
 354 /* isochronous write URB context structure
 355  * data to be stored along with the URB and retrieved when it is returned
 356  * as completed by the USB subsystem
 357  * - urb: pointer to the URB itself
 358  * - bcs: pointer to the B Channel control structure
 359  * - limit: end of write buffer area covered by this URB
 360  */
 361 struct isow_urbctx_t {
 362         struct urb *urb;
 363         struct bc_state *bcs;
 364         int limit;
 365 };
 366
 367 /* AT state structure
 368  * data associated with the state of an ISDN connection, whether or not
 369  * it is currently assigned a B channel
 370  */
 371 struct at_state_t {
 372         struct list_head        list;
 373         int                     waiting;
 374         int                     getstring;
 375         unsigned                timer_index;
 376         unsigned long           timer_expires;
 377         int                     timer_active;
 378         unsigned int            ConState;       /* State of connection */
 379         struct reply_t          *replystruct;
 380         int                     cid;
 381         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 382         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 383         unsigned                pending_commands;       /* see PC_XXXX */
 384         unsigned                seq_index;
 385
 386         struct cardstate        *cs;
 387         struct bc_state         *bcs;
 388 };
 389
 390 struct resp_type_t {
 391         unsigned char   *response;
 392         int             resp_code;      /* RSP_XXXX */
 393         int             type;           /* RT_XXXX */
 394 };
 395
 396 struct event_t {
 397         int type;
 398         void *ptr, *arg;
 399         int parameter;
 400         int cid;
 401         struct at_state_t *at_state;
 402 };
 403
 404 /* This buffer holds all information about the used B-Channel */
 405 struct bc_state {
 406         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 407         struct sk_buff_head squeue;     /* B-Channel send Queue */
 408
 409         /* Variables for debugging .. */
 410         int corrupted;                  /* Counter for corrupted packages */
 411         int trans_down;                 /* Counter of packages (downstream) */
 412         int trans_up;                   /* Counter of packages (upstream) */
 413
 414         struct at_state_t at_state;
 415         unsigned long rcvbytes;
 416
 417         __u16 fcs;
 418         struct sk_buff *skb;
 419         int inputstate;                 /* see INS_XXXX */
 420
 421         int channel;
 422
 423         struct cardstate *cs;
 424
 425         unsigned chstate;               /* bitmap (CHS_*) */
 426         int ignore;
 427         unsigned proto2;                /* Layer 2 protocol (ISDN_PROTO_L2_*) */
 428         char *commands[AT_NUM];         /* see AT_XXXX */
 429
 430 #ifdef CONFIG_GIGASET_DEBUG
 431         int emptycount;
 432 #endif
 433         int busy;
 434         int use_count;
 435
 436         /* private data of hardware drivers */
 437         union {
 438                 struct ser_bc_state *ser;       /* serial hardware driver */
 439                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 440                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 441         } hw;
 442 };
 443
 444 struct cardstate {
 445         struct gigaset_driver *driver;
 446         unsigned minor_index;
 447         struct device *dev;
 448
 449         const struct gigaset_ops *ops;
 450
 451         /* Stuff to handle communication */
 452         wait_queue_head_t waitqueue;
 453         int waiting;
 454         atomic_t mode;                  /* see M_XXXX */
 455         atomic_t mstate;                /* Modem state: see MS_XXXX */
 456                                         /* only changed by the event layer */
 457         int cmd_result;
 458
 459         int channels;
 460         struct bc_state *bcs;           /* Array of struct bc_state */
 461
 462         int onechannel;                 /* data and commands transmitted in one
 463                                            stream (M10x) */
 464
 465         spinlock_t lock;
 466         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 467         struct list_head temp_at_states;/* list of temporary "struct
 468                                            at_state_t"s without B channel */
 469
 470         struct inbuf_t *inbuf;
 471
 472         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 473         spinlock_t cmdlock;
 474         unsigned curlen, cmdbytes;
 475
 476         unsigned open_count;
 477         struct tty_struct *tty;
 478         struct tasklet_struct if_wake_tasklet;
 479         unsigned control_state;
 480
 481         unsigned fwver[4];
 482         int gotfwver;
 483
 484         unsigned running;               /* !=0 if events are handled */
 485         unsigned connected;             /* !=0 if hardware is connected */
 486         unsigned isdn_up;               /* !=0 after ISDN_STAT_RUN */
 487
 488         unsigned cidmode;
 489
 490         int myid;                       /* id for communication with LL */
 491         isdn_if iif;
 492
 493         struct reply_t *tabnocid;
 494         struct reply_t *tabcid;
 495         int cs_init;
 496         int ignoreframes;               /* frames to ignore after setting up the
 497                                            B channel */
 498         struct mutex mutex;             /* locks this structure:
 499                                          *   connected is not changed,
 500                                          *   hardware_up is not changed,
 501                                          *   MState is not changed to or from
 502                                          *   MS_LOCKED */
 503
 504         struct timer_list timer;
 505         int retry_count;
 506         int dle;                        /* !=0 if modem commands/responses are
 507                                            dle encoded */
 508         int cur_at_seq;                 /* sequence of AT commands being
 509                                            processed */
 510         int curchannel;                 /* channel those commands are meant
 511                                            for */
 512         atomic_t commands_pending;      /* flag(s) in xxx.commands_pending have
 513                                            been set */
 514         struct tasklet_struct event_tasklet;
 515                                         /* tasklet for serializing AT commands.
 516                                          * Scheduled
 517                                          *   -> for modem reponses (and
 518                                          *      incoming data for M10x)
 519                                          *   -> on timeout
 520                                          *   -> after setting bits in
 521                                          *      xxx.at_state.pending_command
 522                                          *      (e.g. command from LL) */
 523         struct tasklet_struct write_tasklet;
 524                                         /* tasklet for serial output
 525                                          * (not used in base driver) */
 526
 527         /* event queue */
 528         struct event_t events[MAX_EVENTS];
 529         unsigned ev_tail, ev_head;
 530         spinlock_t ev_lock;
 531
 532         /* current modem response */
 533         unsigned char respdata[MAX_RESP_SIZE];
 534         unsigned cbytes;
 535
 536         /* private data of hardware drivers */
 537         union {
 538                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 539                 struct ser_cardstate *ser; /* serial hardware driver */
 540                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 541         } hw;
 542 };
 543
 544 struct gigaset_driver {
 545         struct list_head list;
 546         spinlock_t lock;                /* locks minor tables and blocked */
 547         struct tty_driver *tty;
 548         unsigned have_tty;
 549         unsigned minor;
 550         unsigned minors;
 551         struct cardstate *cs;
 552         unsigned *flags;
 553         int blocked;
 554
 555         const struct gigaset_ops *ops;
 556         struct module *owner;
 557 };
 558
 559 struct cmdbuf_t {
 560         struct cmdbuf_t *next, *prev;
 561         int len, offset;
 562         struct tasklet_struct *wake_tasklet;
 563         unsigned char buf[0];
 564 };
 565
 566 struct bas_bc_state {
 567         /* isochronous output state */
 568         atomic_t        running;
 569         atomic_t        corrbytes;
 570         spinlock_t      isooutlock;
 571         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 572         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 573         struct isowbuf_t        *isooutbuf;
 574         unsigned numsub;                /* submitted URB counter
 575                                            (for diagnostic messages only) */
 576         struct tasklet_struct   sent_tasklet;
 577
 578         /* isochronous input state */
 579         spinlock_t isoinlock;
 580         struct urb *isoinurbs[BAS_INURBS];
 581         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 582         struct urb *isoindone;          /* completed isoc read URB */
 583         int loststatus;                 /* status of dropped URB */
 584         unsigned isoinlost;             /* number of bytes lost */
 585         /* state of bit unstuffing algorithm
 586            (in addition to BC_state.inputstate) */
 587         unsigned seqlen;                /* number of '1' bits not yet
 588                                            unstuffed */
 589         unsigned inbyte, inbits;        /* collected bits for next byte */
 590         /* statistics */
 591         unsigned goodbytes;             /* bytes correctly received */
 592         unsigned alignerrs;             /* frames with incomplete byte at end */
 593         unsigned fcserrs;               /* FCS errors */
 594         unsigned frameerrs;             /* framing errors */
 595         unsigned giants;                /* long frames */
 596         unsigned runts;                 /* short frames */
 597         unsigned aborts;                /* HDLC aborts */
 598         unsigned shared0s;              /* '0' bits shared between flags */
 599         unsigned stolen0s;              /* '0' stuff bits also serving as
 600                                            leading flag bits */
 601         struct tasklet_struct rcvd_tasklet;
 602 };
 603
 604 struct gigaset_ops {
 605         /* Called from ev-layer.c/interface.c for sending AT commands to the
 606            device */
 607         int (*write_cmd)(struct cardstate *cs,
 608                          const unsigned char *buf, int len,
 609                          struct tasklet_struct *wake_tasklet);
 610
 611         /* Called from interface.c for additional device control */
 612         int (*write_room)(struct cardstate *cs);
 613         int (*chars_in_buffer)(struct cardstate *cs);
 614         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 615
 616         /* Called from ev-layer.c after setting up connection
 617          * Should call gigaset_bchannel_up(), when finished. */
 618         int (*init_bchannel)(struct bc_state *bcs);
 619
 620         /* Called from ev-layer.c after hanging up
 621          * Should call gigaset_bchannel_down(), when finished. */
 622         int (*close_bchannel)(struct bc_state *bcs);
 623
 624         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 625         int (*initbcshw)(struct bc_state *bcs);
 626
 627         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 628         int (*freebcshw)(struct bc_state *bcs);
 629
 630         /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
 631         void (*reinitbcshw)(struct bc_state *bcs);
 632
 633         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 634         int (*initcshw)(struct cardstate *cs);
 635
 636         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 637         void (*freecshw)(struct cardstate *cs);
 638
 639         /* Called from common.c/interface.c for additional serial port
 640            control */
 641         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 642                               unsigned new_state);
 643         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 644         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 645
 646         /* Called from i4l.c to put an skb into the send-queue. */
 647         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 648
 649         /* Called from ev-layer.c to process a block of data
 650          * received through the common/control channel. */
 651         void (*handle_input)(struct inbuf_t *inbuf);
 652
 653 };
 654
 655 /* = Common structures and definitions ======================================= */
 656
 657 /* Parser states for DLE-Event:
 658  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 659  * <DLE_FLAG>:  0x10
 660  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 661  */
 662 #define DLE_FLAG        0x10
 663
 664 /* ===========================================================================
 665  *  Functions implemented in asyncdata.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_m10x_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_m10x_input(struct inbuf_t *inbuf);
 675
 676 /* ===========================================================================
 677  *  Functions implemented in isocdata.c
 678  */
 679
 680 /* Called from i4l.c to put an skb into the send-queue.
 681  * After sending gigaset_skb_sent() should be called. */
 682 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 683
 684 /* Called from ev-layer.c to process a block of data
 685  * received through the common/control channel. */
 686 void gigaset_isoc_input(struct inbuf_t *inbuf);
 687
 688 /* Called from bas-gigaset.c to process a block of data
 689  * received through the isochronous channel */
 690 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 691                           struct bc_state *bcs);
 692
 693 /* Called from bas-gigaset.c to put a block of data
 694  * into the isochronous output buffer */
 695 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 696
 697 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 698 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 699
 700 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 701 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 702
 703 /* ===========================================================================
 704  *  Functions implemented in i4l.c/gigaset.h
 705  */
 706
 707 /* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
 708 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
 709
 710 /* Called from xxx-gigaset.c to indicate completion of sending an skb */
 711 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 712
 713 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 714 int gigaset_isdn_icall(struct at_state_t *at_state);
 715 int gigaset_isdn_setup_accept(struct at_state_t *at_state);
 716 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
 717
 718 void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
 719 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
 720
 721
 722 static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
 723 {
 724         isdn_ctrl response;
 725
 726         /* error -> LL */
 727         gig_dbg(DEBUG_CMD, "sending L1ERR");
 728         response.driver = bcs->cs->myid;
 729         response.command = ISDN_STAT_L1ERR;
 730         response.arg = bcs->channel;
 731         response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 732         bcs->cs->iif.statcallb(&response);
 733 }
 734
 735 /* ===========================================================================
 736  *  Functions implemented in ev-layer.c
 737  */
 738
 739 /* tasklet called from common.c to process queued events */
 740 void gigaset_handle_event(unsigned long data);
 741
 742 /* called from isocdata.c / asyncdata.c
 743  * when a complete modem response line has been received */
 744 void gigaset_handle_modem_response(struct cardstate *cs);
 745
 746 /* ===========================================================================
 747  *  Functions implemented in proc.c
 748  */
 749
 750 /* initialize sysfs for device */
 751 void gigaset_init_dev_sysfs(struct cardstate *cs);
 752 void gigaset_free_dev_sysfs(struct cardstate *cs);
 753
 754 /* ===========================================================================
 755  *  Functions implemented in common.c/gigaset.h
 756  */
 757
 758 void gigaset_bcs_reinit(struct bc_state *bcs);
 759 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 760                      struct cardstate *cs, int cid);
 761 int gigaset_get_channel(struct bc_state *bcs);
 762 void gigaset_free_channel(struct bc_state *bcs);
 763 int gigaset_get_channels(struct cardstate *cs);
 764 void gigaset_free_channels(struct cardstate *cs);
 765 void gigaset_block_channels(struct cardstate *cs);
 766
 767 /* Allocate and initialize driver structure. */
 768 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 769                                           const char *procname,
 770                                           const char *devname,
 771                                           const char *devfsname,
 772                                           const struct gigaset_ops *ops,
 773                                           struct module *owner);
 774
 775 /* Deallocate driver structure. */
 776 void gigaset_freedriver(struct gigaset_driver *drv);
 777 void gigaset_debugdrivers(void);
 778 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 779 struct cardstate *gigaset_get_cs_by_id(int id);
 780
 781 /* For drivers without fixed assignment device<->cardstate (usb) */
 782 struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv);
 783 void gigaset_unassign(struct cardstate *cs);
 784 void gigaset_blockdriver(struct gigaset_driver *drv);
 785
 786 /* Allocate and initialize card state. Calls hardware dependent
 787    gigaset_init[b]cs(). */
 788 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 789                                  int onechannel, int ignoreframes,
 790                                  int cidmode, const char *modulename);
 791
 792 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 793 void gigaset_freecs(struct cardstate *cs);
 794
 795 /* Tell common.c that hardware and driver are ready. */
 796 int gigaset_start(struct cardstate *cs);
 797
 798 /* Tell common.c that the device is not present any more. */
 799 void gigaset_stop(struct cardstate *cs);
 800
 801 /* Tell common.c that the driver is being unloaded. */
 802 void gigaset_shutdown(struct cardstate *cs);
 803
 804 /* Tell common.c that an skb has been sent. */
 805 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 806
 807 /* Append event to the queue.
 808  * Returns NULL on failure or a pointer to the event on success.
 809  * ptr must be kmalloc()ed (and not be freed by the caller).
 810  */
 811 struct event_t *gigaset_add_event(struct cardstate *cs,
 812                                   struct at_state_t *at_state, int type,
 813                                   void *ptr, int parameter, void *arg);
 814
 815 /* Called on CONFIG1 command from frontend. */
 816 int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
 817
 818 /* cs->lock must not be locked */
 819 static inline void gigaset_schedule_event(struct cardstate *cs)
 820 {
 821         unsigned long flags;
 822         spin_lock_irqsave(&cs->lock, flags);
 823         if (cs->running)
 824                 tasklet_schedule(&cs->event_tasklet);
 825         spin_unlock_irqrestore(&cs->lock, flags);
 826 }
 827
 828 /* Tell common.c that B channel has been closed. */
 829 /* cs->lock must not be locked */
 830 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 831 {
 832         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 833
 834         gig_dbg(DEBUG_CMD, "scheduling BC_CLOSED");
 835         gigaset_schedule_event(bcs->cs);
 836 }
 837
 838 /* Tell common.c that B channel has been opened. */
 839 /* cs->lock must not be locked */
 840 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 841 {
 842         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 843
 844         gig_dbg(DEBUG_CMD, "scheduling BC_OPEN");
 845         gigaset_schedule_event(bcs->cs);
 846 }
 847
 848 /* handling routines for sk_buff */
 849 /* ============================= */
 850
 851 /* pass received skb to LL
 852  * Warning: skb must not be accessed anymore!
 853  */
 854 static inline void gigaset_rcv_skb(struct sk_buff *skb,
 855                                    struct cardstate *cs,
 856                                    struct bc_state *bcs)
 857 {
 858         cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
 859         bcs->trans_down++;
 860 }
 861
 862 /* handle reception of corrupted skb
 863  * Warning: skb must not be accessed anymore!
 864  */
 865 static inline void gigaset_rcv_error(struct sk_buff *procskb,
 866                                      struct cardstate *cs,
 867                                      struct bc_state *bcs)
 868 {
 869         if (procskb)
 870                 dev_kfree_skb(procskb);
 871
 872         if (bcs->ignore)
 873                 --bcs->ignore;
 874         else {
 875                 ++bcs->corrupted;
 876                 gigaset_isdn_rcv_err(bcs);
 877         }
 878 }
 879
 880
 881 /* bitwise byte inversion table */
 882 extern __u8 gigaset_invtab[];   /* in common.c */
 883
 884 /* append received bytes to inbuf */
 885 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 886                        unsigned numbytes);
 887
 888 /* ===========================================================================
 889  *  Functions implemented in interface.c
 890  */
 891
 892 /* initialize interface */
 893 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 894                            const char *devname, const char *devfsname);
 895 /* release interface */
 896 void gigaset_if_freedriver(struct gigaset_driver *drv);
 897 /* add minor */
 898 void gigaset_if_init(struct cardstate *cs);
 899 /* remove minor */
 900 void gigaset_if_free(struct cardstate *cs);
 901 /* device received data */
 902 void gigaset_if_receive(struct cardstate *cs,
 903                         unsigned char *buffer, size_t len);
 904
 905 #endif