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 (HZ / 10)
  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 #define IFNULL(a) \
  76         if (unlikely(!(a)))
  77
  78 #define IFNULLRET(a) \
  79         if (unlikely(!(a))) { \
  80                 err("%s==NULL at %s:%d!", #a, __FILE__, __LINE__); \
  81                 return; \
  82         }
  83
  84 #define IFNULLRETVAL(a,b) \
  85         if (unlikely(!(a))) { \
  86                 err("%s==NULL at %s:%d!", #a, __FILE__, __LINE__); \
  87                 return (b); \
  88         }
  89
  90 #define IFNULLCONT(a) \
  91         if (unlikely(!(a))) { \
  92                 err("%s==NULL at %s:%d!", #a, __FILE__, __LINE__); \
  93                 continue; \
  94         }
  95
  96 #define IFNULLGOTO(a,b) \
  97         if (unlikely(!(a))) { \
  98                 err("%s==NULL at %s:%d!", #a, __FILE__, __LINE__); \
  99                 goto b; \
 100         }
 101
 102 extern int gigaset_debuglevel;  /* "needs" cast to (enum debuglevel) */
 103
 104 /* any combination of these can be given with the 'debug=' parameter to insmod,
 105  * e.g. 'insmod usb_gigaset.o debug=0x2c' will set DEBUG_OPEN, DEBUG_CMD and
 106  * DEBUG_INTR.
 107  */
 108 enum debuglevel { /* up to 24 bits (atomic_t) */
 109         DEBUG_REG         = 0x0002,/* serial port I/O register operations */
 110         DEBUG_OPEN        = 0x0004, /* open/close serial port */
 111         DEBUG_INTR        = 0x0008, /* interrupt processing */
 112         DEBUG_INTR_DUMP   = 0x0010, /* Activating hexdump debug output on
 113                                        interrupt requests, not available as
 114                                        run-time option */
 115         DEBUG_CMD         = 0x00020, /* sent/received LL commands */
 116         DEBUG_STREAM      = 0x00040, /* application data stream I/O events */
 117         DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
 118         DEBUG_LLDATA      = 0x00100, /* sent/received LL data */
 119         DEBUG_INTR_0      = 0x00200, /* serial port interrupt processing */
 120         DEBUG_DRIVER      = 0x00400, /* driver structure */
 121         DEBUG_HDLC        = 0x00800, /* M10x HDLC processing */
 122         DEBUG_WRITE       = 0x01000, /* M105 data write */
 123         DEBUG_TRANSCMD    = 0x02000, /* AT-COMMANDS+RESPONSES */
 124         DEBUG_MCMD        = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
 125         DEBUG_INIT        = 0x08000, /* (de)allocation+initialization of data
 126                                         structures */
 127         DEBUG_LOCK        = 0x10000, /* semaphore operations */
 128         DEBUG_OUTPUT      = 0x20000, /* output to device */
 129         DEBUG_ISO         = 0x40000, /* isochronous transfers */
 130         DEBUG_IF          = 0x80000, /* character device operations */
 131         DEBUG_USBREQ      = 0x100000, /* USB communication (except payload
 132                                          data) */
 133         DEBUG_LOCKCMD     = 0x200000, /* AT commands and responses when
 134                                          MS_LOCKED */
 135
 136         DEBUG_ANY         = 0x3fffff, /* print message if any of the others is
 137                                          activated */
 138 };
 139
 140 #ifdef CONFIG_GIGASET_DEBUG
 141 #define DEBUG_DEFAULT (DEBUG_INIT | DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
 142 #else
 143 #define DEBUG_DEFAULT 0
 144 #endif
 145
 146 /* redefine syslog macros to prepend module name instead of entire
 147  * source path */
 148 #undef info
 149 #define info(format, arg...) \
 150         printk(KERN_INFO "%s: " format "\n", \
 151                THIS_MODULE ? THIS_MODULE->name : "gigaset_hw" , ## arg)
 152
 153 #undef notice
 154 #define notice(format, arg...) \
 155         printk(KERN_NOTICE "%s: " format "\n", \
 156                THIS_MODULE ? THIS_MODULE->name : "gigaset_hw" , ## arg)
 157
 158 #undef warn
 159 #define warn(format, arg...) \
 160         printk(KERN_WARNING "%s: " format "\n", \
 161                THIS_MODULE ? THIS_MODULE->name : "gigaset_hw" , ## arg)
 162
 163 #undef err
 164 #define err(format, arg...) \
 165         printk(KERN_ERR "%s: " format "\n", \
 166                THIS_MODULE ? THIS_MODULE->name : "gigaset_hw" , ## arg)
 167
 168 #undef dbg
 169 #ifdef CONFIG_GIGASET_DEBUG
 170 #define dbg(level, format, arg...) \
 171         do { \
 172                 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
 173                         printk(KERN_DEBUG "%s: " format "\n", \
 174                                THIS_MODULE ? THIS_MODULE->name : "gigaset_hw" \
 175                                , ## arg); \
 176         } while (0)
 177 #else
 178 #define dbg(level, format, arg...) do {} while (0)
 179 #endif
 180
 181 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
 182                         size_t len, const unsigned char *buf, int from_user);
 183
 184 /* connection state */
 185 #define ZSAU_NONE                       0
 186 #define ZSAU_DISCONNECT_IND             4
 187 #define ZSAU_OUTGOING_CALL_PROCEEDING   1
 188 #define ZSAU_PROCEEDING                 1
 189 #define ZSAU_CALL_DELIVERED             2
 190 #define ZSAU_ACTIVE                     3
 191 #define ZSAU_NULL                       5
 192 #define ZSAU_DISCONNECT_REQ             6
 193 #define ZSAU_UNKNOWN                    -1
 194
 195 /* USB control transfer requests */
 196 #define OUT_VENDOR_REQ  (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 197 #define IN_VENDOR_REQ   (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
 198
 199 /* int-in-events 3070 */
 200 #define HD_B1_FLOW_CONTROL              0x80
 201 #define HD_B2_FLOW_CONTROL              0x81
 202 #define HD_RECEIVEATDATA_ACK            (0x35)          // 3070
 203                                                 // att: HD_RECEIVE>>AT<<DATA_ACK
 204 #define HD_READY_SEND_ATDATA            (0x36)          // 3070
 205 #define HD_OPEN_ATCHANNEL_ACK           (0x37)          // 3070
 206 #define HD_CLOSE_ATCHANNEL_ACK          (0x38)          // 3070
 207 #define HD_DEVICE_INIT_OK               (0x11)          // ISurf USB + 3070
 208 #define HD_OPEN_B1CHANNEL_ACK           (0x51)          // ISurf USB + 3070
 209 #define HD_OPEN_B2CHANNEL_ACK           (0x52)          // ISurf USB + 3070
 210 #define HD_CLOSE_B1CHANNEL_ACK          (0x53)          // ISurf USB + 3070
 211 #define HD_CLOSE_B2CHANNEL_ACK          (0x54)          // ISurf USB + 3070
 212 //       Powermangment
 213 #define HD_SUSPEND_END                  (0x61)          // ISurf USB
 214 //   Configuration
 215 #define HD_RESET_INTERRUPT_PIPE_ACK     (0xFF)          // ISurf USB + 3070
 216
 217 /* control requests 3070 */
 218 #define HD_OPEN_B1CHANNEL               (0x23)          // ISurf USB + 3070
 219 #define HD_CLOSE_B1CHANNEL              (0x24)          // ISurf USB + 3070
 220 #define HD_OPEN_B2CHANNEL               (0x25)          // ISurf USB + 3070
 221 #define HD_CLOSE_B2CHANNEL              (0x26)          // ISurf USB + 3070
 222 #define HD_RESET_INTERRUPT_PIPE         (0x27)          // ISurf USB + 3070
 223 #define HD_DEVICE_INIT_ACK              (0x34)          // ISurf USB + 3070
 224 #define HD_WRITE_ATMESSAGE              (0x12)          // 3070
 225 #define HD_READ_ATMESSAGE               (0x13)          // 3070
 226 #define HD_OPEN_ATCHANNEL               (0x28)          // 3070
 227 #define HD_CLOSE_ATCHANNEL              (0x29)          // 3070
 228
 229 /* USB frames for isochronous transfer */
 230 #define BAS_FRAMETIME   1       /* number of milliseconds between frames */
 231 #define BAS_NUMFRAMES   8       /* number of frames per URB */
 232 #define BAS_MAXFRAME    16      /* allocated bytes per frame */
 233 #define BAS_NORMFRAME   8       /* send size without flow control */
 234 #define BAS_HIGHFRAME   10      /* "    "    with positive flow control */
 235 #define BAS_LOWFRAME    5       /* "    "    with negative flow control */
 236 #define BAS_CORRFRAMES  4       /* flow control multiplicator */
 237
 238 #define BAS_INBUFSIZE   (BAS_MAXFRAME * BAS_NUMFRAMES)
 239                                         /* size of isoc in buf per URB */
 240 #define BAS_OUTBUFSIZE  4096            /* size of common isoc out buffer */
 241 #define BAS_OUTBUFPAD   BAS_MAXFRAME    /* size of pad area for isoc out buf */
 242
 243 #define BAS_INURBS      3
 244 #define BAS_OUTURBS     3
 245
 246 /* variable commands in struct bc_state */
 247 #define AT_ISO          0
 248 #define AT_DIAL         1
 249 #define AT_MSN          2
 250 #define AT_BC           3
 251 #define AT_PROTO        4
 252 #define AT_TYPE         5
 253 #define AT_HLC          6
 254 #define AT_NUM          7
 255
 256 /* variables in struct at_state_t */
 257 #define VAR_ZSAU        0
 258 #define VAR_ZDLE        1
 259 #define VAR_ZVLS        2
 260 #define VAR_ZCTP        3
 261 #define VAR_NUM         4
 262
 263 #define STR_NMBR        0
 264 #define STR_ZCPN        1
 265 #define STR_ZCON        2
 266 #define STR_ZBC         3
 267 #define STR_ZHLC        4
 268 #define STR_NUM         5
 269
 270 #define EV_TIMEOUT      -105
 271 #define EV_IF_VER       -106
 272 #define EV_PROC_CIDMODE -107
 273 #define EV_SHUTDOWN     -108
 274 #define EV_START        -110
 275 #define EV_STOP         -111
 276 #define EV_IF_LOCK      -112
 277 #define EV_PROTO_L2     -113
 278 #define EV_ACCEPT       -114
 279 #define EV_DIAL         -115
 280 #define EV_HUP          -116
 281 #define EV_BC_OPEN      -117
 282 #define EV_BC_CLOSED    -118
 283
 284 /* input state */
 285 #define INS_command     0x0001
 286 #define INS_DLE_char    0x0002
 287 #define INS_byte_stuff  0x0004
 288 #define INS_have_data   0x0008
 289 #define INS_skip_frame  0x0010
 290 #define INS_DLE_command 0x0020
 291 #define INS_flag_hunt   0x0040
 292
 293 /* channel state */
 294 #define CHS_D_UP        0x01
 295 #define CHS_B_UP        0x02
 296 #define CHS_NOTIFY_LL   0x04
 297
 298 #define ICALL_REJECT    0
 299 #define ICALL_ACCEPT    1
 300 #define ICALL_IGNORE    2
 301
 302 /* device state */
 303 #define MS_UNINITIALIZED        0
 304 #define MS_INIT                 1
 305 #define MS_LOCKED               2
 306 #define MS_SHUTDOWN             3
 307 #define MS_RECOVER              4
 308 #define MS_READY                5
 309
 310 /* mode */
 311 #define M_UNKNOWN       0
 312 #define M_CONFIG        1
 313 #define M_UNIMODEM      2
 314 #define M_CID           3
 315
 316 /* start mode */
 317 #define SM_LOCKED       0
 318 #define SM_ISDN         1 /* default */
 319
 320 struct gigaset_ops;
 321 struct gigaset_driver;
 322
 323 struct usb_cardstate;
 324 struct ser_cardstate;
 325 struct bas_cardstate;
 326
 327 struct bc_state;
 328 struct usb_bc_state;
 329 struct ser_bc_state;
 330 struct bas_bc_state;
 331
 332 struct reply_t {
 333         int     resp_code;      /* RSP_XXXX */
 334         int     min_ConState;   /* <0 => ignore */
 335         int     max_ConState;   /* <0 => ignore */
 336         int     parameter;      /* e.g. ZSAU_XXXX <0: ignore*/
 337         int     new_ConState;   /* <0 => ignore */
 338         int     timeout;        /* >0 => *HZ; <=0 => TOUT_XXXX*/
 339         int     action[MAXACT]; /* ACT_XXXX */
 340         char    *command;       /* NULL==none */
 341 };
 342
 343 extern struct reply_t gigaset_tab_cid_m10x[];
 344 extern struct reply_t gigaset_tab_nocid_m10x[];
 345
 346 struct inbuf_t {
 347         unsigned char           *rcvbuf;        /* usb-gigaset receive buffer */
 348         struct bc_state         *bcs;
 349         struct cardstate        *cs;
 350         int                     inputstate;
 351         atomic_t                head, tail;
 352         unsigned char           data[RBUFSIZE];
 353 };
 354
 355 /* isochronous write buffer structure
 356  * circular buffer with pad area for extraction of complete USB frames
 357  * - data[read..nextread-1] is valid data already submitted to the USB subsystem
 358  * - data[nextread..write-1] is valid data yet to be sent
 359  * - data[write] is the next byte to write to
 360  *   - in byte-oriented L2 procotols, it is completely free
 361  *   - in bit-oriented L2 procotols, it may contain a partial byte of valid data
 362  * - data[write+1..read-1] is free
 363  * - wbits is the number of valid data bits in data[write], starting at the LSB
 364  * - writesem is the semaphore for writing to the buffer:
 365  *   if writesem <= 0, data[write..read-1] is currently being written to
 366  * - idle contains the byte value to repeat when the end of valid data is
 367  *   reached; if nextread==write (buffer contains no data to send), either the
 368  *   BAS_OUTBUFPAD bytes immediately before data[write] (if
 369  *   write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
 370  *   are also filled with that value
 371  * - optionally, the following statistics on the buffer's usage can be
 372  *   collected:
 373  *   maxfill:    maximum number of bytes occupied
 374  *   idlefills:  number of times a frame of idle bytes is prepared
 375  *   emptygets:  number of times the buffer was empty when a data frame was
 376  *               requested
 377  *   backtoback: number of times two data packets were entered into the buffer
 378  *               without intervening idle flags
 379  *   nakedback:  set if no idle flags have been inserted since the last data
 380  *               packet
 381  */
 382 struct isowbuf_t {
 383         atomic_t        read;
 384         atomic_t        nextread;
 385         atomic_t        write;
 386         atomic_t        writesem;
 387         int             wbits;
 388         unsigned char   data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
 389         unsigned char   idle;
 390 };
 391
 392 /* isochronous write URB context structure
 393  * data to be stored along with the URB and retrieved when it is returned
 394  * as completed by the USB subsystem
 395  * - urb: pointer to the URB itself
 396  * - bcs: pointer to the B Channel control structure
 397  * - limit: end of write buffer area covered by this URB
 398  */
 399 struct isow_urbctx_t {
 400         struct urb *urb;
 401         struct bc_state *bcs;
 402         int limit;
 403 };
 404
 405 /* AT state structure
 406  * data associated with the state of an ISDN connection, whether or not
 407  * it is currently assigned a B channel
 408  */
 409 struct at_state_t {
 410         struct list_head        list;
 411         int                     waiting;
 412         int                     getstring;
 413         atomic_t                timer_index;
 414         unsigned long           timer_expires;
 415         int                     timer_active;
 416         unsigned int            ConState;       /* State of connection */
 417         struct reply_t          *replystruct;
 418         int                     cid;
 419         int                     int_var[VAR_NUM];       /* see VAR_XXXX */
 420         char                    *str_var[STR_NUM];      /* see STR_XXXX */
 421         unsigned                pending_commands;       /* see PC_XXXX */
 422         atomic_t                seq_index;
 423
 424         struct cardstate        *cs;
 425         struct bc_state         *bcs;
 426 };
 427
 428 struct resp_type_t {
 429         unsigned char   *response;
 430         int             resp_code;      /* RSP_XXXX */
 431         int             type;           /* RT_XXXX */
 432 };
 433
 434 struct event_t {
 435         int type;
 436         void *ptr, *arg;
 437         int parameter;
 438         int cid;
 439         struct at_state_t *at_state;
 440 };
 441
 442 /* This buffer holds all information about the used B-Channel */
 443 struct bc_state {
 444         struct sk_buff *tx_skb;         /* Current transfer buffer to modem */
 445         struct sk_buff_head squeue;     /* B-Channel send Queue */
 446
 447         /* Variables for debugging .. */
 448         int corrupted;                  /* Counter for corrupted packages */
 449         int trans_down;                 /* Counter of packages (downstream) */
 450         int trans_up;                   /* Counter of packages (upstream) */
 451
 452         struct at_state_t at_state;
 453         unsigned long rcvbytes;
 454
 455         __u16 fcs;
 456         struct sk_buff *skb;
 457         int inputstate;                 /* see INS_XXXX */
 458
 459         int channel;
 460
 461         struct cardstate *cs;
 462
 463         unsigned chstate;               /* bitmap (CHS_*) */
 464         int ignore;
 465         unsigned proto2;                /* Layer 2 protocol (ISDN_PROTO_L2_*) */
 466         char *commands[AT_NUM];         /* see AT_XXXX */
 467
 468 #ifdef CONFIG_GIGASET_DEBUG
 469         int emptycount;
 470 #endif
 471         int busy;
 472         int use_count;
 473
 474         /* hardware drivers */
 475         union {
 476                 struct ser_bc_state *ser;       /* serial hardware driver */
 477                 struct usb_bc_state *usb;       /* usb hardware driver (m105) */
 478                 struct bas_bc_state *bas;       /* usb hardware driver (base) */
 479         } hw;
 480 };
 481
 482 struct cardstate {
 483         struct gigaset_driver *driver;
 484         unsigned minor_index;
 485
 486         const struct gigaset_ops *ops;
 487
 488         /* Stuff to handle communication */
 489         wait_queue_head_t waitqueue;
 490         int waiting;
 491         atomic_t mode;                  /* see M_XXXX */
 492         atomic_t mstate;                /* Modem state: see MS_XXXX */
 493                                         /* only changed by the event layer */
 494         int cmd_result;
 495
 496         int channels;
 497         struct bc_state *bcs;           /* Array of struct bc_state */
 498
 499         int onechannel;                 /* data and commands transmitted in one
 500                                            stream (M10x) */
 501
 502         spinlock_t lock;
 503         struct at_state_t at_state;     /* at_state_t for cid == 0 */
 504         struct list_head temp_at_states;/* list of temporary "struct
 505                                            at_state_t"s without B channel */
 506
 507         struct inbuf_t *inbuf;
 508
 509         struct cmdbuf_t *cmdbuf, *lastcmdbuf;
 510         spinlock_t cmdlock;
 511         unsigned curlen, cmdbytes;
 512
 513         unsigned open_count;
 514         struct tty_struct *tty;
 515         struct tasklet_struct if_wake_tasklet;
 516         unsigned control_state;
 517
 518         unsigned fwver[4];
 519         int gotfwver;
 520
 521         atomic_t running;               /* !=0 if events are handled */
 522         atomic_t connected;             /* !=0 if hardware is connected */
 523
 524         atomic_t cidmode;
 525
 526         int myid;                       /* id for communication with LL */
 527         isdn_if iif;
 528
 529         struct reply_t *tabnocid;
 530         struct reply_t *tabcid;
 531         int cs_init;
 532         int ignoreframes;               /* frames to ignore after setting up the
 533                                            B channel */
 534         struct semaphore sem;           /* locks this structure: */
 535                                         /*   connected is not changed, */
 536                                         /*   hardware_up is not changed, */
 537                                         /*   MState is not changed to or from
 538                                              MS_LOCKED */
 539
 540         struct timer_list timer;
 541         int retry_count;
 542         int dle;                        /* !=0 if modem commands/responses are
 543                                            dle encoded */
 544         int cur_at_seq;                 /* sequence of AT commands being
 545                                            processed */
 546         int curchannel;                 /* channel, those commands are meant
 547                                            for */
 548         atomic_t commands_pending;      /* flag(s) in xxx.commands_pending have
 549                                            been set */
 550         struct tasklet_struct event_tasklet;
 551                                         /* tasklet for serializing AT commands.
 552                                          * Scheduled
 553                                          *   -> for modem reponses (and
 554                                          *      incomming data for M10x)
 555                                          *   -> on timeout
 556                                          *   -> after setting bits in
 557                                          *      xxx.at_state.pending_command
 558                                          *      (e.g. command from LL) */
 559         struct tasklet_struct write_tasklet;
 560                                         /* tasklet for serial output
 561                                          * (not used in base driver) */
 562
 563         /* event queue */
 564         struct event_t events[MAX_EVENTS];
 565         atomic_t ev_tail, ev_head;
 566         spinlock_t ev_lock;
 567
 568         /* current modem response */
 569         unsigned char respdata[MAX_RESP_SIZE];
 570         unsigned cbytes;
 571
 572         /* hardware drivers */
 573         union {
 574                 struct usb_cardstate *usb; /* USB hardware driver (m105) */
 575                 struct ser_cardstate *ser; /* serial hardware driver */
 576                 struct bas_cardstate *bas; /* USB hardware driver (base) */
 577         } hw;
 578 };
 579
 580 struct gigaset_driver {
 581         struct list_head list;
 582         spinlock_t lock;                /* locks minor tables and blocked */
 583         struct tty_driver *tty;
 584         unsigned have_tty;
 585         unsigned minor;
 586         unsigned minors;
 587         struct cardstate *cs;
 588         unsigned *flags;
 589         int blocked;
 590
 591         const struct gigaset_ops *ops;
 592         struct module *owner;
 593 };
 594
 595 struct cmdbuf_t {
 596         struct cmdbuf_t *next, *prev;
 597         int len, offset;
 598         struct tasklet_struct *wake_tasklet;
 599         unsigned char buf[0];
 600 };
 601
 602 struct bas_bc_state {
 603         /* isochronous output state */
 604         atomic_t        running;
 605         atomic_t        corrbytes;
 606         spinlock_t      isooutlock;
 607         struct isow_urbctx_t    isoouturbs[BAS_OUTURBS];
 608         struct isow_urbctx_t    *isooutdone, *isooutfree, *isooutovfl;
 609         struct isowbuf_t        *isooutbuf;
 610         unsigned numsub;                        /* submitted URB counter (for
 611                                                    diagnostic messages only) */
 612         struct tasklet_struct   sent_tasklet;
 613
 614         /* isochronous input state */
 615         spinlock_t isoinlock;
 616         struct urb *isoinurbs[BAS_INURBS];
 617         unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
 618         struct urb *isoindone;                  /* completed isoc read URB */
 619         int loststatus;                         /* status of dropped URB */
 620         unsigned isoinlost;                     /* number of bytes lost */
 621         /* state of bit unstuffing algorithm (in addition to
 622            BC_state.inputstate) */
 623         unsigned seqlen;                        /* number of '1' bits not yet
 624                                                    unstuffed */
 625         unsigned inbyte, inbits;                /* collected bits for next byte
 626                                                 */
 627         /* statistics */
 628         unsigned goodbytes;                     /* bytes correctly received */
 629         unsigned alignerrs;                     /* frames with incomplete byte
 630                                                    at end */
 631         unsigned fcserrs;                       /* FCS errors */
 632         unsigned frameerrs;                     /* framing errors */
 633         unsigned giants;                        /* long frames */
 634         unsigned runts;                         /* short frames */
 635         unsigned aborts;                        /* HDLC aborts */
 636         unsigned shared0s;                      /* '0' bits shared between flags
 637                                                 */
 638         unsigned stolen0s;                      /* '0' stuff bits also serving
 639                                                    as leading flag bits */
 640         struct tasklet_struct rcvd_tasklet;
 641 };
 642
 643 struct gigaset_ops {
 644         /* Called from ev-layer.c/interface.c for sending AT commands to the
 645            device */
 646         int (*write_cmd)(struct cardstate *cs,
 647                          const unsigned char *buf, int len,
 648                          struct tasklet_struct *wake_tasklet);
 649
 650         /* Called from interface.c for additional device control */
 651         int (*write_room)(struct cardstate *cs);
 652         int (*chars_in_buffer)(struct cardstate *cs);
 653         int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
 654
 655         /* Called from ev-layer.c after setting up connection
 656          * Should call gigaset_bchannel_up(), when finished. */
 657         int (*init_bchannel)(struct bc_state *bcs);
 658
 659         /* Called from ev-layer.c after hanging up
 660          * Should call gigaset_bchannel_down(), when finished. */
 661         int (*close_bchannel)(struct bc_state *bcs);
 662
 663         /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
 664         int (*initbcshw)(struct bc_state *bcs);
 665
 666         /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
 667         int (*freebcshw)(struct bc_state *bcs);
 668
 669         /* Called by gigaset_stop() or gigaset_bchannel_down() for resetting
 670            bcs->hw.xxx */
 671         void (*reinitbcshw)(struct bc_state *bcs);
 672
 673         /* Called by gigaset_initcs() for setting up cs->hw.xxx */
 674         int (*initcshw)(struct cardstate *cs);
 675
 676         /* Called by gigaset_freecs() for freeing cs->hw.xxx */
 677         void (*freecshw)(struct cardstate *cs);
 678
 679         /* Called from common.c/interface.c for additional serial port
 680            control */
 681         int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
 682                               unsigned new_state);
 683         int (*baud_rate)(struct cardstate *cs, unsigned cflag);
 684         int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
 685
 686         /* Called from i4l.c to put an skb into the send-queue. */
 687         int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
 688
 689         /* Called from ev-layer.c to process a block of data
 690          * received through the common/control channel. */
 691         void (*handle_input)(struct inbuf_t *inbuf);
 692
 693 };
 694
 695 /* = Common structures and definitions ======================================= */
 696
 697 /* Parser states for DLE-Event:
 698  * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
 699  * <DLE_FLAG>:  0x10
 700  * <EVENT>:     ((a-z)* | (A-Z)* | (0-10)*)+
 701  */
 702 #define DLE_FLAG       0x10
 703
 704 /* ===========================================================================
 705  *  Functions implemented in asyncdata.c
 706  */
 707
 708 /* Called from i4l.c to put an skb into the send-queue.
 709  * After sending gigaset_skb_sent() should be called. */
 710 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 711
 712 /* Called from ev-layer.c to process a block of data
 713  * received through the common/control channel. */
 714 void gigaset_m10x_input(struct inbuf_t *inbuf);
 715
 716 /* ===========================================================================
 717  *  Functions implemented in isocdata.c
 718  */
 719
 720 /* Called from i4l.c to put an skb into the send-queue.
 721  * After sending gigaset_skb_sent() should be called. */
 722 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
 723
 724 /* Called from ev-layer.c to process a block of data
 725  * received through the common/control channel. */
 726 void gigaset_isoc_input(struct inbuf_t *inbuf);
 727
 728 /* Called from bas-gigaset.c to process a block of data
 729  * received through the isochronous channel */
 730 void gigaset_isoc_receive(unsigned char *src, unsigned count,
 731                           struct bc_state *bcs);
 732
 733 /* Called from bas-gigaset.c to put a block of data
 734  * into the isochronous output buffer */
 735 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
 736
 737 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
 738 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
 739
 740 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
 741 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
 742
 743 /* ===========================================================================
 744  *  Functions implemented in i4l.c/gigaset.h
 745  */
 746
 747 /* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
 748 int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
 749
 750 /* Called from xxx-gigaset.c to indicate completion of sending an skb */
 751 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 752
 753 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
 754 int gigaset_isdn_icall(struct at_state_t *at_state);
 755 int gigaset_isdn_setup_accept(struct at_state_t *at_state);
 756 int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
 757
 758 void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
 759 void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
 760
 761
 762 static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
 763 {
 764         isdn_ctrl response;
 765
 766         /* error -> LL */
 767         dbg(DEBUG_CMD, "sending L1ERR");
 768         response.driver = bcs->cs->myid;
 769         response.command = ISDN_STAT_L1ERR;
 770         response.arg = bcs->channel;
 771         response.parm.errcode = ISDN_STAT_L1ERR_RECV;
 772         bcs->cs->iif.statcallb(&response);
 773 }
 774
 775 /* ===========================================================================
 776  *  Functions implemented in ev-layer.c
 777  */
 778
 779 /* tasklet called from common.c to process queued events */
 780 void gigaset_handle_event(unsigned long data);
 781
 782 /* called from isocdata.c / asyncdata.c
 783  * when a complete modem response line has been received */
 784 void gigaset_handle_modem_response(struct cardstate *cs);
 785
 786 /* ===========================================================================
 787  *  Functions implemented in proc.c
 788  */
 789
 790 /* initialize sysfs for device */
 791 void gigaset_init_dev_sysfs(struct usb_interface *interface);
 792 void gigaset_free_dev_sysfs(struct usb_interface *interface);
 793
 794 /* ===========================================================================
 795  *  Functions implemented in common.c/gigaset.h
 796  */
 797
 798 void gigaset_bcs_reinit(struct bc_state *bcs);
 799 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
 800                      struct cardstate *cs, int cid);
 801 int gigaset_get_channel(struct bc_state *bcs);
 802 void gigaset_free_channel(struct bc_state *bcs);
 803 int gigaset_get_channels(struct cardstate *cs);
 804 void gigaset_free_channels(struct cardstate *cs);
 805 void gigaset_block_channels(struct cardstate *cs);
 806
 807 /* Allocate and initialize driver structure. */
 808 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
 809                                           const char *procname,
 810                                           const char *devname,
 811                                           const char *devfsname,
 812                                           const struct gigaset_ops *ops,
 813                                           struct module *owner);
 814
 815 /* Deallocate driver structure. */
 816 void gigaset_freedriver(struct gigaset_driver *drv);
 817 void gigaset_debugdrivers(void);
 818 struct cardstate *gigaset_get_cs_by_minor(unsigned minor);
 819 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
 820 struct cardstate *gigaset_get_cs_by_id(int id);
 821
 822 /* For drivers without fixed assignment device<->cardstate (usb) */
 823 struct cardstate *gigaset_getunassignedcs(struct gigaset_driver *drv);
 824 void gigaset_unassign(struct cardstate *cs);
 825 void gigaset_blockdriver(struct gigaset_driver *drv);
 826
 827 /* Allocate and initialize card state. Calls hardware dependent
 828    gigaset_init[b]cs(). */
 829 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
 830                                  int onechannel, int ignoreframes,
 831                                  int cidmode, const char *modulename);
 832
 833 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
 834 void gigaset_freecs(struct cardstate *cs);
 835
 836 /* Tell common.c that hardware and driver are ready. */
 837 int gigaset_start(struct cardstate *cs);
 838
 839 /* Tell common.c that the device is not present any more. */
 840 void gigaset_stop(struct cardstate *cs);
 841
 842 /* Tell common.c that the driver is being unloaded. */
 843 void gigaset_shutdown(struct cardstate *cs);
 844
 845 /* Tell common.c that an skb has been sent. */
 846 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
 847
 848 /* Append event to the queue.
 849  * Returns NULL on failure or a pointer to the event on success.
 850  * ptr must be kmalloc()ed (and not be freed by the caller).
 851  */
 852 struct event_t *gigaset_add_event(struct cardstate *cs,
 853                                   struct at_state_t *at_state, int type,
 854                                   void *ptr, int parameter, void *arg);
 855
 856 /* Called on CONFIG1 command from frontend. */
 857 int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
 858
 859 /* cs->lock must not be locked */
 860 static inline void gigaset_schedule_event(struct cardstate *cs)
 861 {
 862         unsigned long flags;
 863         spin_lock_irqsave(&cs->lock, flags);
 864         if (atomic_read(&cs->running))
 865                 tasklet_schedule(&cs->event_tasklet);
 866         spin_unlock_irqrestore(&cs->lock, flags);
 867 }
 868
 869 /* Tell common.c that B channel has been closed. */
 870 /* cs->lock must not be locked */
 871 static inline void gigaset_bchannel_down(struct bc_state *bcs)
 872 {
 873         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
 874
 875         dbg(DEBUG_CMD, "scheduling BC_CLOSED");
 876         gigaset_schedule_event(bcs->cs);
 877 }
 878
 879 /* Tell common.c that B channel has been opened. */
 880 /* cs->lock must not be locked */
 881 static inline void gigaset_bchannel_up(struct bc_state *bcs)
 882 {
 883         gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
 884
 885         dbg(DEBUG_CMD, "scheduling BC_OPEN");
 886         gigaset_schedule_event(bcs->cs);
 887 }
 888
 889 /* handling routines for sk_buff */
 890 /* ============================= */
 891
 892 /* private version of __skb_put()
 893  * append 'len' bytes to the content of 'skb', already knowing that the
 894  * existing buffer can accomodate them
 895  * returns a pointer to the location where the new bytes should be copied to
 896  * This function does not take any locks so it must be called with the
 897  * appropriate locks held only.
 898  */
 899 static inline unsigned char *gigaset_skb_put_quick(struct sk_buff *skb,
 900                                                    unsigned int len)
 901 {
 902         unsigned char *tmp = skb->tail;
 903         /*SKB_LINEAR_ASSERT(skb);*/             /* not needed here */
 904         skb->tail += len;
 905         skb->len += len;
 906         return tmp;
 907 }
 908
 909 /* pass received skb to LL
 910  * Warning: skb must not be accessed anymore!
 911  */
 912 static inline void gigaset_rcv_skb(struct sk_buff *skb,
 913                                    struct cardstate *cs,
 914                                    struct bc_state *bcs)
 915 {
 916         cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
 917         bcs->trans_down++;
 918 }
 919
 920 /* handle reception of corrupted skb
 921  * Warning: skb must not be accessed anymore!
 922  */
 923 static inline void gigaset_rcv_error(struct sk_buff *procskb,
 924                                      struct cardstate *cs,
 925                                      struct bc_state *bcs)
 926 {
 927         if (procskb)
 928                 dev_kfree_skb(procskb);
 929
 930         if (bcs->ignore)
 931                 --bcs->ignore;
 932         else {
 933                 ++bcs->corrupted;
 934                 gigaset_isdn_rcv_err(bcs);
 935         }
 936 }
 937
 938
 939 /* bitwise byte inversion table */
 940 extern __u8 gigaset_invtab[];   /* in common.c */
 941
 942
 943 /* append received bytes to inbuf */
 944 static inline int gigaset_fill_inbuf(struct inbuf_t *inbuf,
 945                                      const unsigned char *src,
 946                                      unsigned numbytes)
 947 {
 948         unsigned n, head, tail, bytesleft;
 949
 950         dbg(DEBUG_INTR, "received %u bytes", numbytes);
 951
 952         if (!numbytes)
 953                 return 0;
 954
 955         bytesleft = numbytes;
 956         tail = atomic_read(&inbuf->tail);
 957         head = atomic_read(&inbuf->head);
 958         dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
 959
 960         while (bytesleft) {
 961                 if (head > tail)
 962                         n = head - 1 - tail;
 963                 else if (head == 0)
 964                         n = (RBUFSIZE-1) - tail;
 965                 else
 966                         n = RBUFSIZE - tail;
 967                 if (!n) {
 968                         err("buffer overflow (%u bytes lost)", bytesleft);
 969                         break;
 970                 }
 971                 if (n > bytesleft)
 972                         n = bytesleft;
 973                 memcpy(inbuf->data + tail, src, n);
 974                 bytesleft -= n;
 975                 tail = (tail + n) % RBUFSIZE;
 976                 src += n;
 977         }
 978         dbg(DEBUG_INTR, "setting tail to %u", tail);
 979         atomic_set(&inbuf->tail, tail);
 980         return numbytes != bytesleft;
 981 }
 982
 983 /* ===========================================================================
 984  *  Functions implemented in interface.c
 985  */
 986
 987 /* initialize interface */
 988 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
 989                            const char *devname, const char *devfsname);
 990 /* release interface */
 991 void gigaset_if_freedriver(struct gigaset_driver *drv);
 992 /* add minor */
 993 void gigaset_if_init(struct cardstate *cs);
 994 /* remove minor */
 995 void gigaset_if_free(struct cardstate *cs);
 996 /* device received data */
 997 void gigaset_if_receive(struct cardstate *cs,
 998                         unsigned char *buffer, size_t len);
 999
1000 #endif