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 <Eilers.Stefan@epost.de>
   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 MAX_TIMER_INDEX 1000
  59 #define MAX_SEQ_INDEX   1000
  60
  61 #define GIG_TICK 100            /* in milliseconds */
  62
  63 /* timeout values (unit: 1 sec) */
  64 #define INIT_TIMEOUT 1
  65
  66 /* timeout values (unit: 0.1 sec) */
  67 #define RING_TIMEOUT 3          /* for additional parameters to RING */
  68 #define BAS_TIMEOUT 20          /* for response to Base USB ops */
  69 #define ATRDY_TIMEOUT 3         /* for HD_READY_SEND_ATDATA */
  70
  71 #define BAS_RETRY 3             /* max. retries for base USB ops */
  72
  73 #define MAXACT 3
  74
  75 extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
  76
  77 /* any combination of these can be given with the 'debug=' parameter to insmod,
  78  * e.g. 'insmod usb_gigaset.o debug=0x2c' will set DEBUG_OPEN, DEBUG_CMD and
  79  * DEBUG_INTR.
  80  */
  81 enum debuglevel { /* up to 24 bits (atomic_t) */
  82         DEBUG_REG         = 0x0002, /* serial port I/O register operations */
  83         DEBUG_OPEN        = 0x0004, /* open/close serial port */
  84         DEBUG_INTR        = 0x0008, /* interrupt processing */
  85         DEBUG_INTR_DUMP   = 0x0010, /* Activating hexdump debug output on
  86                                        interrupt requests, not available as
  87                                        run-time option */
  88         DEBUG_CMD         = 0x00020, /* sent/received LL commands */
  89         DEBUG_STREAM      = 0x00040, /* application data stream I/O events */
  90         DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
  91         DEBUG_LLDATA      = 0x00100, /* sent/received LL data */
  92         DEBUG_INTR_0      = 0x00200, /* serial port interrupt processing */
  93         DEBUG_DRIVER      = 0x00400, /* driver structure */
  94         DEBUG_HDLC        = 0x00800, /* M10x HDLC processing */
  95         DEBUG_WRITE       = 0x01000, /* M105 data write */
  96         DEBUG_TRANSCMD    = 0x02000, /* AT-COMMANDS+RESPONSES */
  97         DEBUG_MCMD        = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
  98         DEBUG_INIT        = 0x08000, /* (de)allocation+initialization of data
  99                                         structures */
 100         DEBUG_LOCK        = 0x10000, /* semaphore operations */
 101         DEBUG_OUTPUT      = 0x20000, /* output to device */
 102         DEBUG_ISO         = 0x40000, /* isochronous transfers */
 103         DEBUG_IF          = 0x80000, /* character device operations */
 104         DEBUG_USBREQ      = 0x100000, /* USB communication (except payload
 105                                          data) */
 106         DEBUG_LOCKCMD     = 0x200000, /* AT commands and responses when
 107                                          MS_LOCKED */
 108
 109         DEBUG_ANY         = 0x3fffff, /* print message if any of the others is
 110                                          activated */
 111 };
 112
 113 /* missing from linux/device.h ... */
 114 #ifndef dev_notice
 115 #define dev_notice(dev, format, arg...)         \
 116         dev_printk(KERN_NOTICE , dev , format , ## arg)
 117 #endif
 118
 119 /* Kernel message macros for situations where dev_printk and friends cannot be
 120  * used for lack of reliable access to a device structure.
 121  * linux/usb.h already contains these but in an obsolete form which clutters
 122  * the log needlessly, and according to the USB maintainer those should be
 123  * removed rather than fixed anyway.
 124  */
 125 #undef err
 126 #undef info
 127 #undef warn
 128 #undef notice
 129
 130 #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
 131         format "\n" , ## arg)
 132 #define info(format, arg...) printk(KERN_INFO KBUILD_MODNAME ": " \
 133         format "\n" , ## arg)
 134 #define warn(format, arg...) printk(KERN_WARNING KBUILD_MODNAME ": " \
 135         format "\n" , ## arg)
 136 #define notice(format, arg...) printk(KERN_NOTICE KBUILD_MODNAME ": " \
 137         format "\n" , ## arg)
 138
 139 #ifdef CONFIG_GIGASET_DEBUG
 140
 141 #define gig_dbg(level, format, arg...) \
 142         do { \
 143                 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 144                         printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
 145                                ## arg); \
 146         } while (0)
 147 #define DEBUG_DEFAULT (DEBUG_INIT | DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 148
 149 #else
 150
 151 #define gig_dbg(level, format, arg...) do {} while (0)
 152 #define DEBUG_DEFAULT 0
 153
 154 #endif
 155
 156 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 157                         size_t len, const unsigned char *buf);
 158
 159 /* connection state */
 160 #define ZSAU_NONE                       0
 161 #define ZSAU_DISCONNECT_IND             4
 162 #define ZSAU_OUTGOING_CALL_PROCEEDING   1
 163 #define ZSAU_PROCEEDING                 1
 164 #define ZSAU_CALL_DELIVERED             2
 165 #define ZSAU_ACTIVE                     3
 166 #define ZSAU_NULL                       5
 167 #define ZSAU_DISCONNECT_REQ             6
 168 #define ZSAU_UNKNOWN                    -1
 169
 170 /* USB control transfer requests */
 171 #define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 172 #define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 173
 174 /* int-in-events 3070 */
 175 #define HD_B1_FLOW_CONTROL              0x80
 176 #define HD_B2_FLOW_CONTROL              0x81
 177 #define HD_RECEIVEATDATA_ACK            (0x35)          // 3070
 178                                                 // att: HD_RECEIVE>>AT<<DATA_ACK
 179 #define HD_READY_SEND_ATDATA            (0x36)          // 3070
 180 #define HD_OPEN_ATCHANNEL_ACK           (0x37)          // 3070
 181 #define HD_CLOSE_ATCHANNEL_ACK          (0x38)          // 3070
 182 #define HD_DEVICE_INIT_OK               (0x11)          // ISurf USB + 3070
 183 #define HD_OPEN_B1CHANNEL_ACK           (0x51)          // ISurf USB + 3070
 184 #define HD_OPEN_B2CHANNEL_ACK           (0x52)          // ISurf USB + 3070
 185 #define HD_CLOSE_B1CHANNEL_ACK          (0x53)          // ISurf USB + 3070
 186 #define HD_CLOSE_B2CHANNEL_ACK          (0x54)          // ISurf USB + 3070
 187 //       Powermangment
 188 #define HD_SUSPEND_END                  (0x61)          // ISurf USB
 189 //   Configuration
 190 #define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          // ISurf USB + 3070
 191
 192 /* control requests 3070 */
 193 #define HD_OPEN_B1CHANNEL               (0x23)          // ISurf USB + 3070
 194 #define HD_CLOSE_B1CHANNEL              (0x24)          // ISurf USB + 3070
 195 #define HD_OPEN_B2CHANNEL               (0x25)          // ISurf USB + 3070
 196 #define HD_CLOSE_B2CHANNEL              (0x26)          // ISurf USB + 3070
 197 #define HD_RESET_INTERRUPT_PIPE         (0x27)          // ISurf USB + 3070
 198 #define HD_DEVICE_INIT_ACK              (0x34)          // ISurf USB + 3070
 199 #define HD_WRITE_ATMESSAGE              (0x12)          // 3070
 200 #define HD_READ_ATMESSAGE               (0x13)          // 3070
 201 #define HD_OPEN_ATCHANNEL               (0x28)          // 3070
 202 #define HD_CLOSE_ATCHANNEL              (0x29)          // 3070
 203
 204 /* USB frames for isochronous transfer */
 205 #define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 206 #define BAS_NUMFRAMES   8       /* number of frames per URB */
 207 #define BAS_MAXFRAME    16      /* allocated bytes per frame */
 208 #define BAS_NORMFRAME   8       /* send size without flow control */
 209 #define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 210 #define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 211 #define BAS_CORRFRAMES  4       /* flow control multiplicator */
 212
 213 #define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 214                                         /* size of isoc in buf per URB */
 215 #define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 216 #define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 217
 218 #define BAS_INURBS      3
 219 #define BAS_OUTURBS     3
 220
 221 /* variable commands in struct bc_state */
 222 #define AT_ISO          0
 223 #define AT_DIAL         1
 224 #define AT_MSN          2
 225 #define AT_BC           3
 226 #define AT_PROTO        4
 227 #define AT_TYPE         5
 228 #define AT_HLC          6
 229 #define AT_NUM          7
 230
 231 /* variables in struct at_state_t */
 232 #define VAR_ZSAU        0
 233 #define VAR_ZDLE        1
 234 #define VAR_ZVLS        2
 235 #define VAR_ZCTP        3
 236 #define VAR_NUM         4
 237
 238 #define STR_NMBR        0
 239 #define STR_ZCPN        1
 240 #define STR_ZCON        2
 241 #define STR_ZBC         3
 242 #define STR_ZHLC        4
 243 #define STR_NUM         5
 244
 245 #define EV_TIMEOUT      -105
 246 #define EV_IF_VER       -106
 247 #define EV_PROC_CIDMODE -107
 248 #define EV_SHUTDOWN     -108
 249 #define EV_START        -110
 250 #define EV_STOP         -111
 251 #define EV_IF_LOCK      -112
 252 #define EV_PROTO_L2     -113
 253 #define EV_ACCEPT       -114
 254 #define EV_DIAL         -115
 255 #define EV_HUP          -116
 256 #define EV_BC_OPEN      -117
 257 #define EV_BC_CLOSED    -118
 258
 259 /* input state */
 260 #define INS_command     0x0001
 261 #define INS_DLE_char    0x0002
 262 #define INS_byte_stuff  0x0004
 263 #define INS_have_data   0x0008
 264 #define INS_skip_frame  0x0010
 265 #define INS_DLE_command 0x0020
 266 #define INS_flag_hunt   0x0040
 267
 268 /* channel state */
 269 #define CHS_D_UP        0x01
 270 #define CHS_B_UP        0x02
 271 #define CHS_NOTIFY_LL   0x04
 272
 273 #define ICALL_REJECT    0
 274 #define ICALL_ACCEPT    1
 275 #define ICALL_IGNORE    2
 276
 277 /* device state */
 278 #define MS_UNINITIALIZED        0
 279 #define MS_INIT                 1
 280 #define MS_LOCKED               2
 281 #define MS_SHUTDOWN             3
 282 #define MS_RECOVER              4
 283 #define MS_READY                5
 284
 285 /* mode */
 286 #define M_UNKNOWN       0
 287 #define M_CONFIG        1
 288 #define M_UNIMODEM      2
 289 #define M_CID           3
 290
 291 /* start mode */
 292 #define SM_LOCKED       0
 293 #define SM_ISDN         1 /* default */
 294
 295 struct gigaset_ops;
 296 struct gigaset_driver;
 297
 298 struct usb_cardstate;
 299 struct ser_cardstate;
 300 struct bas_cardstate;
 301
 302 struct bc_state;
 303 struct usb_bc_state;
 304 struct ser_bc_state;
 305 struct bas_bc_state;
 306
 307 struct reply_t {
 308         int     resp_code;      /* RSP_XXXX */
 309         int     min_ConState;   /* <0 => ignore */
 310         int     max_ConState;   /* <0 => ignore */
 311         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 312         int     new_ConState;   /* <0 => ignore */
 313         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 314         int     action[MAXACT]; /* ACT_XXXX */
 315         char    *command;       /* NULL==none */
 316 };
 317
 318 extern struct reply_t gigaset_tab_cid_m10x[];
 319 extern struct reply_t gigaset_tab_nocid_m10x[];
 320
 321 struct inbuf_t {
 322         unsigned char           *rcvbuf;        /* usb-gigaset receive buffer */
 323         struct bc_state         *bcs;
 324         struct cardstate        *cs;
 325         int                     inputstate;
 326         atomic_t                head, tail;
 327         unsigned char           data[RBUFSIZE];
 328 };
 329
 330 /* isochronous write buffer structure
 331  * circular buffer with pad area for extraction of complete USB frames
 332  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 333  * - data[nextread..write-1] is valid data yet to be sent
 334  * - data[write] is the next byte to write to
 335  *   - in byte-oriented L2 procotols, it is completely free
 336  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 337  * - data[write+1..read-1] is free
 338  * - wbits is the number of valid data bits in data[write], starting at the LSB
 339  * - writesem is the semaphore for writing to the buffer:
 340  *   if writesem <= 0, data[write..read-1] is currently being written to
 341  * - idle contains the byte value to repeat when the end of valid data is
 342  *   reached; if nextread==write (buffer contains no data to send), either the
 343  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 344  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 345  *   are also filled with that value
 346  */
 347 struct isowbuf_t {
 348         atomic_t        read;
 349         atomic_t        nextread;
 350         atomic_t        write;
 351         atomic_t        writesem;
 352         int             wbits;
 353         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 354         unsigned char   idle;
 355 };
 356
 357 /* isochronous write URB context structure
 358  * data to be stored along with the URB and retrieved when it is returned
 359  * as completed by the USB subsystem
 360  * - urb: pointer to the URB itself
 361  * - bcs: pointer to the B Channel control structure
 362  * - limit: end of write buffer area covered by this URB
 363  */
 364 struct isow_urbctx_t {
 365         struct urb *urb;
 366         struct bc_state *bcs;
 367         int limit;
 368 };
 369
 370 /* AT state structure
 371  * data associated with the state of an ISDN connection, whether or not
 372  * it is currently assigned a B channel
 373  */
 374 struct at_state_t {
 375         struct list_head        list;
 376         int                     waiting;
 377         int                     getstring;
 378         atomic_t                timer_index;
 379         unsigned long           timer_expires;
 380         int                     timer_active;
 381         unsigned int            ConState;       /* State of connection */
 382         struct reply_t          *replystruct;
 383         int                     cid;
 384         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 385         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 386         unsigned                pending_commands;       /* see PC_XXXX */
 387         atomic_t                seq_index;
 388
 389         struct cardstate        *cs;
 390         struct bc_state         *bcs;
 391 };
 392
 393 struct resp_type_t {
 394         unsigned char   *response;
 395         int             resp_code;      /* RSP_XXXX */
 396         int             type;           /* RT_XXXX */
 397 };
 398
 399 struct event_t {
 400         int type;
 401         void *ptr, *arg;
 402         int parameter;
 403         int cid;
 404         struct at_state_t *at_state;
 405 };
 406
 407 /* This buffer holds all information about the used B-Channel */
 408 struct bc_state {
 409         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 410         struct sk_buff_head squeue;     /* B-Channel send Queue */
 411
 412         /* Variables for debugging .. */
 413         int corrupted;                  /* Counter for corrupted packages */
 414         int trans_down;                 /* Counter of packages (downstream) */
 415         int trans_up;                   /* Counter of packages (upstream) */
 416
 417         struct at_state_t at_state;
 418         unsigned long rcvbytes;
 419
 420         __u16 fcs;
 421         struct sk_buff *skb;
 422         int inputstate;                 /* see INS_XXXX */
 423
 424         int channel;
 425
 426         struct cardstate *cs;
 427
 428         unsigned chstate;               /* bitmap (CHS_*) */
 429         int ignore;
 430         unsigned proto2;                /* Layer 2 protocol (ISDN_PROTO_L2_*) */
 431         char *commands[AT_NUM];         /* see AT_XXXX */
 432
 433 #ifdef CONFIG_GIGASET_DEBUG
 434         int emptycount;
 435 #endif
 436         int busy;
 437         int use_count;
 438
 439         /* private data of hardware drivers */
 440         union {
 441                 struct ser_bc_state *ser;       /* serial hardware driver */
 442                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 443                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 444         } hw;
 445 };
 446
 447 struct cardstate {
 448         struct gigaset_driver *driver;
 449         unsigned minor_index;
 450         struct device *dev;
 451
 452         const struct gigaset_ops *ops;
 453
 454         /* Stuff to handle communication */
 455         wait_queue_head_t waitqueue;
 456         int waiting;
 457         atomic_t mode;                  /* see M_XXXX */
 458         atomic_t mstate;                /* Modem state: see MS_XXXX */
 459                                         /* only changed by the event layer */
 460         int cmd_result;
 461
 462         int channels;
 463         struct bc_state *bcs;           /* Array of struct bc_state */
 464
 465         int onechannel;                 /* data and commands transmitted in one
 466                                            stream (M10x) */
 467
 468         spinlock_t lock;
 469         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 470         struct list_head temp_at_states;/* list of temporary "struct
 471                                            at_state_t"s without B channel */
 472
 473         struct inbuf_t *inbuf;
 474
 475         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 476         spinlock_t cmdlock;
 477         unsigned curlen, cmdbytes;
 478
 479         unsigned open_count;
 480         struct tty_struct *tty;
 481         struct tasklet_struct if_wake_tasklet;
 482         unsigned control_state;
 483
 484         unsigned fwver[4];
 485         int gotfwver;
 486
 487         atomic_t running;               /* !=0 if events are handled */
 488         atomic_t connected;             /* !=0 if hardware is connected */
 489
 490         atomic_t cidmode;
 491
 492         int myid;                       /* id for communication with LL */
 493         isdn_if iif;
 494
 495         struct reply_t *tabnocid;
 496         struct reply_t *tabcid;
 497         int cs_init;
 498         int ignoreframes;               /* frames to ignore after setting up the
 499                                            B channel */
 500         struct semaphore sem;           /* locks this structure:
 501                                          *   connected is not changed,
 502                                          *   hardware_up is not changed,
 503                                          *   MState is not changed to or from
 504                                          *   MS_LOCKED */
 505
 506         struct timer_list timer;
 507         int retry_count;
 508         int dle;                        /* !=0 if modem commands/responses are
 509                                            dle encoded */
 510         int cur_at_seq;                 /* sequence of AT commands being
 511                                            processed */
 512         int curchannel;                 /* channel those commands are meant
 513                                            for */
 514         atomic_t commands_pending;      /* flag(s) in xxx.commands_pending have
 515                                            been set */
 516         struct tasklet_struct event_tasklet;
 517                                         /* tasklet for serializing AT commands.
 518                                          * Scheduled
 519                                          *   -> for modem reponses (and
 520                                          *      incoming data for M10x)
 521                                          *   -> on timeout
 522                                          *   -> after setting bits in
 523                                          *      xxx.at_state.pending_command
 524                                          *      (e.g. command from LL) */
 525         struct tasklet_struct write_tasklet;
 526                                         /* tasklet for serial output
 527                                          * (not used in base driver) */
 528
 529         /* event queue */
 530         struct event_t events[MAX_EVENTS];
 531         atomic_t ev_tail, ev_head;
 532         spinlock_t ev_lock;
 533
 534         /* current modem response */
 535         unsigned char respdata[MAX_RESP_SIZE];
 536         unsigned cbytes;
 537
 538         /* private data of hardware drivers */
 539         union {
 540                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 541                 struct ser_cardstate *ser; /* serial hardware driver */
 542                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 543         } hw;
 544 };
 545
 546 struct gigaset_driver {
 547         struct list_head list;
 548         spinlock_t lock;                /* locks minor tables and blocked */
 549         struct tty_driver *tty;
 550         unsigned have_tty;
 551         unsigned minor;
 552         unsigned minors;
 553         struct cardstate *cs;
 554         unsigned *flags;
 555         int blocked;
 556
 557         const struct gigaset_ops *ops;
 558         struct module *owner;
 559 };
 560
 561 struct cmdbuf_t {
 562         struct cmdbuf_t *next, *prev;
 563         int len, offset;
 564         struct tasklet_struct *wake_tasklet;
 565         unsigned char buf[0];
 566 };
 567
 568 struct bas_bc_state {
 569         /* isochronous output state */
 570         atomic_t        running;
 571         atomic_t        corrbytes;
 572         spinlock_t      isooutlock;
 573         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 574         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 575         struct isowbuf_t        *isooutbuf;
 576         unsigned numsub;                /* submitted URB counter
 577                                            (for diagnostic messages only) */
 578         struct tasklet_struct   sent_tasklet;
 579
 580         /* isochronous input state */
 581         spinlock_t isoinlock;
 582         struct urb *isoinurbs[BAS_INURBS];
 583         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 584         struct urb *isoindone;          /* completed isoc read URB */
 585         int loststatus;                 /* status of dropped URB */
 586         unsigned isoinlost;             /* number of bytes lost */
 587         /* state of bit unstuffing algorithm
 588            (in addition to BC_state.inputstate) */
 589         unsigned seqlen;                /* number of '1' bits not yet
 590                                            unstuffed */
 591         unsigned inbyte, inbits;        /* collected bits for next byte */
 592         /* statistics */
 593         unsigned goodbytes;             /* bytes correctly received */
 594         unsigned alignerrs;             /* frames with incomplete byte at end */
 595         unsigned fcserrs;               /* FCS errors */
 596         unsigned frameerrs;             /* framing errors */
 597         unsigned giants;                /* long frames */
 598         unsigned runts;                 /* short frames */
 599         unsigned aborts;                /* HDLC aborts */
 600         unsigned shared0s;              /* '0' bits shared between flags */
 601         unsigned stolen0s;              /* '0' stuff bits also serving as
 602                                            leading flag bits */
 603         struct tasklet_struct rcvd_tasklet;
 604 };
 605
 606 struct gigaset_ops {
 607         /* Called from ev-layer.c/interface.c for sending AT commands to the
 608            device */
 609         int (*write_cmd)(struct cardstate *cs,
 610                          const unsigned char *buf, int len,
 611                          struct tasklet_struct *wake_tasklet);
 612
 613         /* Called from interface.c for additional device control */
 614         int (*write_room)(struct cardstate *cs);
 615         int (*chars_in_buffer)(struct cardstate *cs);
 616         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 617
 618         /* Called from ev-layer.c after setting up connection
 619          * Should call gigaset_bchannel_up(), when finished. */
 620         int (*init_bchannel)(struct bc_state *bcs);
 621
 622         /* Called from ev-layer.c after hanging up
 623          * Should call gigaset_bchannel_down(), when finished. */
 624         int (*close_bchannel)(struct bc_state *bcs);
 625
 626         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 627         int (*initbcshw)(struct bc_state *bcs);
 628
 629         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 630         int (*freebcshw)(struct bc_state *bcs);
 631
 632         /* Called by gigaset_stop() or gigaset_bchannel_down() for resetting
 633            bcs->hw.xxx */
 634         void (*reinitbcshw)(struct bc_state *bcs);
 635
 636         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 637         int (*initcshw)(struct cardstate *cs);
 638
 639         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 640         void (*freecshw)(struct cardstate *cs);
 641
 642         /* Called from common.c/interface.c for additional serial port
 643            control */
 644         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 645                               unsigned new_state);
 646         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 647         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 648
 649         /* Called from i4l.c to put an skb into the send-queue. */
 650         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 651
 652         /* Called from ev-layer.c to process a block of data
 653          * received through the common/control channel. */
 654         void (*handle_input)(struct inbuf_t *inbuf);
 655
 656 };
 657
 658 /* = Common structures and definitions ======================================= */
 659
 660 /* Parser states for DLE-Event:
 661  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 662  * <DLE_FLAG>:  0x10
 663  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 664  */
 665 #define DLE_FLAG        0x10
 666
 667 /* ===========================================================================
 668  *  Functions implemented in asyncdata.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_m10x_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_m10x_input(struct inbuf_t *inbuf);
 678
 679 /* ===========================================================================
 680  *  Functions implemented in isocdata.c
 681  */
 682
 683 /* Called from i4l.c to put an skb into the send-queue.
 684  * After sending gigaset_skb_sent() should be called. */
 685 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 686
 687 /* Called from ev-layer.c to process a block of data
 688  * received through the common/control channel. */
 689 void gigaset_isoc_input(struct inbuf_t *inbuf);
 690
 691 /* Called from bas-gigaset.c to process a block of data
 692  * received through the isochronous channel */
 693 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 694                           struct bc_state *bcs);
 695
 696 /* Called from bas-gigaset.c to put a block of data
 697  * into the isochronous output buffer */
 698 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 699
 700 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 701 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 702
 703 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 704 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 705
 706 /* ===========================================================================
 707  *  Functions implemented in i4l.c/gigaset.h
 708  */
 709
 710 /* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
 711 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
 712
 713 /* Called from xxx-gigaset.c to indicate completion of sending an skb */
 714 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 715
 716 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 717 int gigaset_isdn_icall(struct at_state_t *at_state);
 718 int gigaset_isdn_setup_accept(struct at_state_t *at_state);
 719 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
 720
 721 void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
 722 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
 723
 724
 725 static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
 726 {
 727         isdn_ctrl response;
 728
 729         /* error -> LL */
 730         gig_dbg(DEBUG_CMD, "sending L1ERR");
 731         response.driver = bcs->cs->myid;
 732         response.command = ISDN_STAT_L1ERR;
 733         response.arg = bcs->channel;
 734         response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 735         bcs->cs->iif.statcallb(&response);
 736 }
 737
 738 /* ===========================================================================
 739  *  Functions implemented in ev-layer.c
 740  */
 741
 742 /* tasklet called from common.c to process queued events */
 743 void gigaset_handle_event(unsigned long data);
 744
 745 /* called from isocdata.c / asyncdata.c
 746  * when a complete modem response line has been received */
 747 void gigaset_handle_modem_response(struct cardstate *cs);
 748
 749 /* ===========================================================================
 750  *  Functions implemented in proc.c
 751  */
 752
 753 /* initialize sysfs for device */
 754 void gigaset_init_dev_sysfs(struct cardstate *cs);
 755 void gigaset_free_dev_sysfs(struct cardstate *cs);
 756
 757 /* ===========================================================================
 758  *  Functions implemented in common.c/gigaset.h
 759  */
 760
 761 void gigaset_bcs_reinit(struct bc_state *bcs);
 762 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 763                      struct cardstate *cs, int cid);
 764 int gigaset_get_channel(struct bc_state *bcs);
 765 void gigaset_free_channel(struct bc_state *bcs);
 766 int gigaset_get_channels(struct cardstate *cs);
 767 void gigaset_free_channels(struct cardstate *cs);
 768 void gigaset_block_channels(struct cardstate *cs);
 769
 770 /* Allocate and initialize driver structure. */
 771 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 772                                           const char *procname,
 773                                           const char *devname,
 774                                           const char *devfsname,
 775                                           const struct gigaset_ops *ops,
 776                                           struct module *owner);
 777
 778 /* Deallocate driver structure. */
 779 void gigaset_freedriver(struct gigaset_driver *drv);
 780 void gigaset_debugdrivers(void);
 781 struct cardstate *gigaset_get_cs_by_minor(unsigned minor);
 782 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 783 struct cardstate *gigaset_get_cs_by_id(int id);
 784
 785 /* For drivers without fixed assignment device<->cardstate (usb) */
 786 struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv);
 787 void gigaset_unassign(struct cardstate *cs);
 788 void gigaset_blockdriver(struct gigaset_driver *drv);
 789
 790 /* Allocate and initialize card state. Calls hardware dependent
 791    gigaset_init[b]cs(). */
 792 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 793                                  int onechannel, int ignoreframes,
 794                                  int cidmode, const char *modulename);
 795
 796 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 797 void gigaset_freecs(struct cardstate *cs);
 798
 799 /* Tell common.c that hardware and driver are ready. */
 800 int gigaset_start(struct cardstate *cs);
 801
 802 /* Tell common.c that the device is not present any more. */
 803 void gigaset_stop(struct cardstate *cs);
 804
 805 /* Tell common.c that the driver is being unloaded. */
 806 void gigaset_shutdown(struct cardstate *cs);
 807
 808 /* Tell common.c that an skb has been sent. */
 809 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 810
 811 /* Append event to the queue.
 812  * Returns NULL on failure or a pointer to the event on success.
 813  * ptr must be kmalloc()ed (and not be freed by the caller).
 814  */
 815 struct event_t *gigaset_add_event(struct cardstate *cs,
 816                                   struct at_state_t *at_state, int type,
 817                                   void *ptr, int parameter, void *arg);
 818
 819 /* Called on CONFIG1 command from frontend. */
 820 int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
 821
 822 /* cs->lock must not be locked */
 823 static inline void gigaset_schedule_event(struct cardstate *cs)
 824 {
 825         unsigned long flags;
 826         spin_lock_irqsave(&cs->lock, flags);
 827         if (atomic_read(&cs->running))
 828                 tasklet_schedule(&cs->event_tasklet);
 829         spin_unlock_irqrestore(&cs->lock, flags);
 830 }
 831
 832 /* Tell common.c that B channel has been closed. */
 833 /* cs->lock must not be locked */
 834 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 835 {
 836         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 837
 838         gig_dbg(DEBUG_CMD, "scheduling BC_CLOSED");
 839         gigaset_schedule_event(bcs->cs);
 840 }
 841
 842 /* Tell common.c that B channel has been opened. */
 843 /* cs->lock must not be locked */
 844 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 845 {
 846         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 847
 848         gig_dbg(DEBUG_CMD, "scheduling BC_OPEN");
 849         gigaset_schedule_event(bcs->cs);
 850 }
 851
 852 /* handling routines for sk_buff */
 853 /* ============================= */
 854
 855 /* private version of __skb_put()
 856  * append 'len' bytes to the content of 'skb', already knowing that the
 857  * existing buffer can accomodate them
 858  * returns a pointer to the location where the new bytes should be copied to
 859  * This function does not take any locks so it must be called with the
 860  * appropriate locks held only.
 861  */
 862 static inline unsigned char *gigaset_skb_put_quick(struct sk_buff *skb,
 863                                                    unsigned int len)
 864 {
 865         unsigned char *tmp = skb->tail;
 866         /*SKB_LINEAR_ASSERT(skb);*/             /* not needed here */
 867         skb->tail += len;
 868         skb->len += len;
 869         return tmp;
 870 }
 871
 872 /* pass received skb to LL
 873  * Warning: skb must not be accessed anymore!
 874  */
 875 static inline void gigaset_rcv_skb(struct sk_buff *skb,
 876                                    struct cardstate *cs,
 877                                    struct bc_state *bcs)
 878 {
 879         cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
 880         bcs->trans_down++;
 881 }
 882
 883 /* handle reception of corrupted skb
 884  * Warning: skb must not be accessed anymore!
 885  */
 886 static inline void gigaset_rcv_error(struct sk_buff *procskb,
 887                                      struct cardstate *cs,
 888                                      struct bc_state *bcs)
 889 {
 890         if (procskb)
 891                 dev_kfree_skb(procskb);
 892
 893         if (bcs->ignore)
 894                 --bcs->ignore;
 895         else {
 896                 ++bcs->corrupted;
 897                 gigaset_isdn_rcv_err(bcs);
 898         }
 899 }
 900
 901
 902 /* bitwise byte inversion table */
 903 extern __u8 gigaset_invtab[];   /* in common.c */
 904
 905 /* append received bytes to inbuf */
 906 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
 907                        unsigned numbytes);
 908
 909 /* ===========================================================================
 910  *  Functions implemented in interface.c
 911  */
 912
 913 /* initialize interface */
 914 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 915                            const char *devname, const char *devfsname);
 916 /* release interface */
 917 void gigaset_if_freedriver(struct gigaset_driver *drv);
 918 /* add minor */
 919 void gigaset_if_init(struct cardstate *cs);
 920 /* remove minor */
 921 void gigaset_if_free(struct cardstate *cs);
 922 /* device received data */
 923 void gigaset_if_receive(struct cardstate *cs,
 924                         unsigned char *buffer, size_t len);
 925
 926 #endif