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/* define global prefix for pr_ macros in linux/kernel.h */ 20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22#include <linux/kernel.h> 23#include <linux/sched.h> 24#include <linux/compiler.h> 25#include <linux/types.h> 26#include <linux/ctype.h> 27#include <linux/slab.h> 28#include <linux/spinlock.h> 29#include <linux/skbuff.h> 30#include <linux/netdevice.h> 31#include <linux/ppp_defs.h> 32#include <linux/timer.h> 33#include <linux/interrupt.h> 34#include <linux/tty.h> 35#include <linux/tty_driver.h> 36#include <linux/list.h> 37#include <asm/atomic.h> 38 39#define GIG_VERSION {0, 5, 0, 0} 40#define GIG_COMPAT {0, 4, 0, 0} 41 42#define MAX_REC_PARAMS 10 /* Max. number of params in response string */ 43#define MAX_RESP_SIZE 511 /* Max. size of a response string */ 44 45#define MAX_EVENTS 64 /* size of event queue */ 46 47#define RBUFSIZE 8192 48 49#define GIG_TICK 100 /* in milliseconds */ 50 51/* timeout values (unit: 1 sec) */ 52#define INIT_TIMEOUT 1 53 54/* timeout values (unit: 0.1 sec) */ 55#define RING_TIMEOUT 3 /* for additional parameters to RING */ 56#define BAS_TIMEOUT 20 /* for response to Base USB ops */ 57#define ATRDY_TIMEOUT 3 /* for HD_READY_SEND_ATDATA */ 58 59#define BAS_RETRY 3 /* max. retries for base USB ops */ 60 61#define MAXACT 3 62 63extern int gigaset_debuglevel; /* "needs" cast to (enum debuglevel) */ 64 65/* debug flags, combine by adding/bitwise OR */ 66enum debuglevel { 67 DEBUG_INTR = 0x00008, /* interrupt processing */ 68 DEBUG_CMD = 0x00020, /* sent/received LL commands */ 69 DEBUG_STREAM = 0x00040, /* application data stream I/O events */ 70 DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */ 71 DEBUG_LLDATA = 0x00100, /* sent/received LL data */ 72 DEBUG_EVENT = 0x00200, /* event processing */ 73 DEBUG_DRIVER = 0x00400, /* driver structure */ 74 DEBUG_HDLC = 0x00800, /* M10x HDLC processing */ 75 DEBUG_CHANNEL = 0x01000, /* channel allocation/deallocation */ 76 DEBUG_TRANSCMD = 0x02000, /* AT-COMMANDS+RESPONSES */ 77 DEBUG_MCMD = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */ 78 DEBUG_INIT = 0x08000, /* (de)allocation+initialization of data 79 structures */ 80 DEBUG_SUSPEND = 0x10000, /* suspend/resume processing */ 81 DEBUG_OUTPUT = 0x20000, /* output to device */ 82 DEBUG_ISO = 0x40000, /* isochronous transfers */ 83 DEBUG_IF = 0x80000, /* character device operations */ 84 DEBUG_USBREQ = 0x100000, /* USB communication (except payload 85 data) */ 86 DEBUG_LOCKCMD = 0x200000, /* AT commands and responses when 87 MS_LOCKED */ 88 89 DEBUG_ANY = 0x3fffff, /* print message if any of the others is 90 activated */ 91}; 92 93#ifdef CONFIG_GIGASET_DEBUG 94 95#define gig_dbg(level, format, arg...) \ 96 do { \ 97 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \ 98 printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \ 99 ## arg); \ 100 } while (0) 101#define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ) 102 103#else 104 105#define gig_dbg(level, format, arg...) do {} while (0) 106#define DEBUG_DEFAULT 0 107 108#endif 109 110void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg, 111 size_t len, const unsigned char *buf); 112 113/* connection state */ 114#define ZSAU_NONE 0 115#define ZSAU_DISCONNECT_IND 4 116#define ZSAU_OUTGOING_CALL_PROCEEDING 1 117#define ZSAU_PROCEEDING 1 118#define ZSAU_CALL_DELIVERED 2 119#define ZSAU_ACTIVE 3 120#define ZSAU_NULL 5 121#define ZSAU_DISCONNECT_REQ 6 122#define ZSAU_UNKNOWN -1 123 124/* USB control transfer requests */ 125#define OUT_VENDOR_REQ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT) 126#define IN_VENDOR_REQ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT) 127 128/* interrupt pipe messages */ 129#define HD_B1_FLOW_CONTROL 0x80 130#define HD_B2_FLOW_CONTROL 0x81 131#define HD_RECEIVEATDATA_ACK (0x35) /* 3070 */ 132#define HD_READY_SEND_ATDATA (0x36) /* 3070 */ 133#define HD_OPEN_ATCHANNEL_ACK (0x37) /* 3070 */ 134#define HD_CLOSE_ATCHANNEL_ACK (0x38) /* 3070 */ 135#define HD_DEVICE_INIT_OK (0x11) /* ISurf USB + 3070 */ 136#define HD_OPEN_B1CHANNEL_ACK (0x51) /* ISurf USB + 3070 */ 137#define HD_OPEN_B2CHANNEL_ACK (0x52) /* ISurf USB + 3070 */ 138#define HD_CLOSE_B1CHANNEL_ACK (0x53) /* ISurf USB + 3070 */ 139#define HD_CLOSE_B2CHANNEL_ACK (0x54) /* ISurf USB + 3070 */ 140#define HD_SUSPEND_END (0x61) /* ISurf USB */ 141#define HD_RESET_INTERRUPT_PIPE_ACK (0xFF) /* ISurf USB + 3070 */ 142 143/* control requests */ 144#define HD_OPEN_B1CHANNEL (0x23) /* ISurf USB + 3070 */ 145#define HD_CLOSE_B1CHANNEL (0x24) /* ISurf USB + 3070 */ 146#define HD_OPEN_B2CHANNEL (0x25) /* ISurf USB + 3070 */ 147#define HD_CLOSE_B2CHANNEL (0x26) /* ISurf USB + 3070 */ 148#define HD_RESET_INTERRUPT_PIPE (0x27) /* ISurf USB + 3070 */ 149#define HD_DEVICE_INIT_ACK (0x34) /* ISurf USB + 3070 */ 150#define HD_WRITE_ATMESSAGE (0x12) /* 3070 */ 151#define HD_READ_ATMESSAGE (0x13) /* 3070 */ 152#define HD_OPEN_ATCHANNEL (0x28) /* 3070 */ 153#define HD_CLOSE_ATCHANNEL (0x29) /* 3070 */ 154 155/* number of B channels supported by base driver */ 156#define BAS_CHANNELS 2 157 158/* USB frames for isochronous transfer */ 159#define BAS_FRAMETIME 1 /* number of milliseconds between frames */ 160#define BAS_NUMFRAMES 8 /* number of frames per URB */ 161#define BAS_MAXFRAME 16 /* allocated bytes per frame */ 162#define BAS_NORMFRAME 8 /* send size without flow control */ 163#define BAS_HIGHFRAME 10 /* " " with positive flow control */ 164#define BAS_LOWFRAME 5 /* " " with negative flow control */ 165#define BAS_CORRFRAMES 4 /* flow control multiplicator */ 166 167#define BAS_INBUFSIZE (BAS_MAXFRAME * BAS_NUMFRAMES) 168 /* size of isoc in buf per URB */ 169#define BAS_OUTBUFSIZE 4096 /* size of common isoc out buffer */ 170#define BAS_OUTBUFPAD BAS_MAXFRAME /* size of pad area for isoc out buf */ 171 172#define BAS_INURBS 3 173#define BAS_OUTURBS 3 174 175/* variable commands in struct bc_state */ 176#define AT_ISO 0 177#define AT_DIAL 1 178#define AT_MSN 2 179#define AT_BC 3 180#define AT_PROTO 4 181#define AT_TYPE 5 182#define AT_CLIP 6 183/* total number */ 184#define AT_NUM 7 185 186/* variables in struct at_state_t */ 187#define VAR_ZSAU 0 188#define VAR_ZDLE 1 189#define VAR_ZCTP 2 190#define VAR_NUM 3 191 192#define STR_NMBR 0 193#define STR_ZCPN 1 194#define STR_ZCON 2 195#define STR_ZBC 3 196#define STR_ZHLC 4 197#define STR_NUM 5 198 199#define EV_TIMEOUT -105 200#define EV_IF_VER -106 201#define EV_PROC_CIDMODE -107 202#define EV_SHUTDOWN -108 203#define EV_START -110 204#define EV_STOP -111 205#define EV_IF_LOCK -112 206#define EV_ACCEPT -114 207#define EV_DIAL -115 208#define EV_HUP -116 209#define EV_BC_OPEN -117 210#define EV_BC_CLOSED -118 211 212/* input state */ 213#define INS_command 0x0001 /* receiving messages (not payload data) */ 214#define INS_DLE_char 0x0002 /* DLE flag received (in DLE mode) */ 215#define INS_byte_stuff 0x0004 216#define INS_have_data 0x0008 217#define INS_DLE_command 0x0020 /* DLE message start (<DLE> X) received */ 218#define INS_flag_hunt 0x0040 219 220/* channel state */ 221#define CHS_D_UP 0x01 222#define CHS_B_UP 0x02 223#define CHS_NOTIFY_LL 0x04 224 225#define ICALL_REJECT 0 226#define ICALL_ACCEPT 1 227#define ICALL_IGNORE 2 228 229/* device state */ 230#define MS_UNINITIALIZED 0 231#define MS_INIT 1 232#define MS_LOCKED 2 233#define MS_SHUTDOWN 3 234#define MS_RECOVER 4 235#define MS_READY 5 236 237/* mode */ 238#define M_UNKNOWN 0 239#define M_CONFIG 1 240#define M_UNIMODEM 2 241#define M_CID 3 242 243/* start mode */ 244#define SM_LOCKED 0 245#define SM_ISDN 1 /* default */ 246 247/* layer 2 protocols (AT^SBPR=...) */ 248#define L2_BITSYNC 0 249#define L2_HDLC 1 250#define L2_VOICE 2 251 252struct gigaset_ops; 253struct gigaset_driver; 254 255struct usb_cardstate; 256struct ser_cardstate; 257struct bas_cardstate; 258 259struct bc_state; 260struct usb_bc_state; 261struct ser_bc_state; 262struct bas_bc_state; 263 264struct reply_t { 265 int resp_code; /* RSP_XXXX */ 266 int min_ConState; /* <0 => ignore */ 267 int max_ConState; /* <0 => ignore */ 268 int parameter; /* e.g. ZSAU_XXXX <0: ignore*/ 269 int new_ConState; /* <0 => ignore */ 270 int timeout; /* >0 => *HZ; <=0 => TOUT_XXXX*/ 271 int action[MAXACT]; /* ACT_XXXX */ 272 char *command; /* NULL==none */ 273}; 274 275extern struct reply_t gigaset_tab_cid[]; 276extern struct reply_t gigaset_tab_nocid[]; 277 278struct inbuf_t { 279 struct cardstate *cs; 280 int inputstate; 281 int head, tail; 282 unsigned char data[RBUFSIZE]; 283}; 284 285/* isochronous write buffer structure 286 * circular buffer with pad area for extraction of complete USB frames 287 * - data[read..nextread-1] is valid data already submitted to the USB subsystem 288 * - data[nextread..write-1] is valid data yet to be sent 289 * - data[write] is the next byte to write to 290 * - in byte-oriented L2 procotols, it is completely free 291 * - in bit-oriented L2 procotols, it may contain a partial byte of valid data 292 * - data[write+1..read-1] is free 293 * - wbits is the number of valid data bits in data[write], starting at the LSB 294 * - writesem is the semaphore for writing to the buffer: 295 * if writesem <= 0, data[write..read-1] is currently being written to 296 * - idle contains the byte value to repeat when the end of valid data is 297 * reached; if nextread==write (buffer contains no data to send), either the 298 * BAS_OUTBUFPAD bytes immediately before data[write] (if 299 * write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD) 300 * are also filled with that value 301 */ 302struct isowbuf_t { 303 int read; 304 int nextread; 305 int write; 306 atomic_t writesem; 307 int wbits; 308 unsigned char data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD]; 309 unsigned char idle; 310}; 311 312/* isochronous write URB context structure 313 * data to be stored along with the URB and retrieved when it is returned 314 * as completed by the USB subsystem 315 * - urb: pointer to the URB itself 316 * - bcs: pointer to the B Channel control structure 317 * - limit: end of write buffer area covered by this URB 318 * - status: URB completion status 319 */ 320struct isow_urbctx_t { 321 struct urb *urb; 322 struct bc_state *bcs; 323 int limit; 324 int status; 325}; 326 327/* AT state structure 328 * data associated with the state of an ISDN connection, whether or not 329 * it is currently assigned a B channel 330 */ 331struct at_state_t { 332 struct list_head list; 333 int waiting; 334 int getstring; 335 unsigned timer_index; 336 unsigned long timer_expires; 337 int timer_active; 338 unsigned int ConState; /* State of connection */ 339 struct reply_t *replystruct; 340 int cid; 341 int int_var[VAR_NUM]; /* see VAR_XXXX */ 342 char *str_var[STR_NUM]; /* see STR_XXXX */ 343 unsigned pending_commands; /* see PC_XXXX */ 344 unsigned seq_index; 345 346 struct cardstate *cs; 347 struct bc_state *bcs; 348}; 349 350struct event_t { 351 int type; 352 void *ptr, *arg; 353 int parameter; 354 int cid; 355 struct at_state_t *at_state; 356}; 357 358/* This buffer holds all information about the used B-Channel */ 359struct bc_state { 360 struct sk_buff *tx_skb; /* Current transfer buffer to modem */ 361 struct sk_buff_head squeue; /* B-Channel send Queue */ 362 363 /* Variables for debugging .. */ 364 int corrupted; /* Counter for corrupted packages */ 365 int trans_down; /* Counter of packages (downstream) */ 366 int trans_up; /* Counter of packages (upstream) */ 367 368 struct at_state_t at_state; 369 370 /* receive buffer */ 371 unsigned rx_bufsize; /* max size accepted by application */ 372 struct sk_buff *rx_skb; 373 __u16 rx_fcs; 374 int inputstate; /* see INS_XXXX */ 375 376 int channel; 377 378 struct cardstate *cs; 379 380 unsigned chstate; /* bitmap (CHS_*) */ 381 int ignore; 382 unsigned proto2; /* layer 2 protocol (L2_*) */ 383 char *commands[AT_NUM]; /* see AT_XXXX */ 384 385#ifdef CONFIG_GIGASET_DEBUG 386 int emptycount; 387#endif 388 int busy; 389 int use_count; 390 391 /* private data of hardware drivers */ 392 union { 393 struct ser_bc_state *ser; /* serial hardware driver */ 394 struct usb_bc_state *usb; /* usb hardware driver (m105) */ 395 struct bas_bc_state *bas; /* usb hardware driver (base) */ 396 } hw; 397 398 void *ap; /* associated LL application */ 399 int apconnstate; /* LL application connection state */ 400 spinlock_t aplock; 401}; 402 403struct cardstate { 404 struct gigaset_driver *driver; 405 unsigned minor_index; 406 struct device *dev; 407 struct device *tty_dev; 408 unsigned flags; 409 410 const struct gigaset_ops *ops; 411 412 /* Stuff to handle communication */ 413 wait_queue_head_t waitqueue; 414 int waiting; 415 int mode; /* see M_XXXX */ 416 int mstate; /* Modem state: see MS_XXXX */ 417 /* only changed by the event layer */ 418 int cmd_result; 419 420 int channels; 421 struct bc_state *bcs; /* Array of struct bc_state */ 422 423 int onechannel; /* data and commands transmitted in one 424 stream (M10x) */ 425 426 spinlock_t lock; 427 struct at_state_t at_state; /* at_state_t for cid == 0 */ 428 struct list_head temp_at_states;/* list of temporary "struct 429 at_state_t"s without B channel */ 430 431 struct inbuf_t *inbuf; 432 433 struct cmdbuf_t *cmdbuf, *lastcmdbuf; 434 spinlock_t cmdlock; 435 unsigned curlen, cmdbytes; 436 437 unsigned open_count; 438 struct tty_struct *tty; 439 struct tasklet_struct if_wake_tasklet; 440 unsigned control_state; 441 442 unsigned fwver[4]; 443 int gotfwver; 444 445 unsigned running; /* !=0 if events are handled */ 446 unsigned connected; /* !=0 if hardware is connected */ 447 unsigned isdn_up; /* !=0 after gigaset_isdn_start() */ 448 449 unsigned cidmode; 450 451 int myid; /* id for communication with LL */ 452 void *iif; /* LL interface structure */ 453 unsigned short hw_hdr_len; /* headroom needed in data skbs */ 454 455 struct reply_t *tabnocid; 456 struct reply_t *tabcid; 457 int cs_init; 458 int ignoreframes; /* frames to ignore after setting up the 459 B channel */ 460 struct mutex mutex; /* locks this structure: 461 * connected is not changed, 462 * hardware_up is not changed, 463 * MState is not changed to or from 464 * MS_LOCKED */ 465 466 struct timer_list timer; 467 int retry_count; 468 int dle; /* !=0 if DLE mode is active 469 (ZDLE=1 received -- M10x only) */ 470 int cur_at_seq; /* sequence of AT commands being 471 processed */ 472 int curchannel; /* channel those commands are meant 473 for */ 474 int commands_pending; 475 struct tasklet_struct event_tasklet; 476 struct tasklet_struct write_tasklet; 477 /* tasklet for serial output 478 * (not used in base driver) */ 479 480 /* event queue */ 481 struct event_t events[MAX_EVENTS]; 482 unsigned ev_tail, ev_head; 483 spinlock_t ev_lock; 484 485 /* current modem response */ 486 unsigned char respdata[MAX_RESP_SIZE+1]; 487 unsigned cbytes; 488 489 /* private data of hardware drivers */ 490 union { 491 struct usb_cardstate *usb; /* USB hardware driver (m105) */ 492 struct ser_cardstate *ser; /* serial hardware driver */ 493 struct bas_cardstate *bas; /* USB hardware driver (base) */ 494 } hw; 495}; 496 497struct gigaset_driver { 498 struct list_head list; 499 spinlock_t lock; /* locks minor tables and blocked */ 500 struct tty_driver *tty; 501 unsigned have_tty; 502 unsigned minor; 503 unsigned minors; 504 struct cardstate *cs; 505 int blocked; 506 507 const struct gigaset_ops *ops; 508 struct module *owner; 509}; 510 511struct cmdbuf_t { 512 struct cmdbuf_t *next, *prev; 513 int len, offset; 514 struct tasklet_struct *wake_tasklet; 515 unsigned char buf[0]; 516}; 517 518struct bas_bc_state { 519 /* isochronous output state */ 520 int running; 521 atomic_t corrbytes; 522 spinlock_t isooutlock; 523 struct isow_urbctx_t isoouturbs[BAS_OUTURBS]; 524 struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl; 525 struct isowbuf_t *isooutbuf; 526 unsigned numsub; /* submitted URB counter 527 (for diagnostic messages only) */ 528 struct tasklet_struct sent_tasklet; 529 530 /* isochronous input state */ 531 spinlock_t isoinlock; 532 struct urb *isoinurbs[BAS_INURBS]; 533 unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS]; 534 struct urb *isoindone; /* completed isoc read URB */ 535 int isoinstatus; /* status of completed URB */ 536 int loststatus; /* status of dropped URB */ 537 unsigned isoinlost; /* number of bytes lost */ 538 /* state of bit unstuffing algorithm 539 (in addition to BC_state.inputstate) */ 540 unsigned seqlen; /* number of '1' bits not yet 541 unstuffed */ 542 unsigned inbyte, inbits; /* collected bits for next byte */ 543 /* statistics */ 544 unsigned goodbytes; /* bytes correctly received */ 545 unsigned alignerrs; /* frames with incomplete byte at end */ 546 unsigned fcserrs; /* FCS errors */ 547 unsigned frameerrs; /* framing errors */ 548 unsigned giants; /* long frames */ 549 unsigned runts; /* short frames */ 550 unsigned aborts; /* HDLC aborts */ 551 unsigned shared0s; /* '0' bits shared between flags */ 552 unsigned stolen0s; /* '0' stuff bits also serving as 553 leading flag bits */ 554 struct tasklet_struct rcvd_tasklet; 555}; 556 557struct gigaset_ops { 558 /* Called from ev-layer.c/interface.c for sending AT commands to the 559 device */ 560 int (*write_cmd)(struct cardstate *cs, struct cmdbuf_t *cb); 561 562 /* Called from interface.c for additional device control */ 563 int (*write_room)(struct cardstate *cs); 564 int (*chars_in_buffer)(struct cardstate *cs); 565 int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]); 566 567 /* Called from ev-layer.c after setting up connection 568 * Should call gigaset_bchannel_up(), when finished. */ 569 int (*init_bchannel)(struct bc_state *bcs); 570 571 /* Called from ev-layer.c after hanging up 572 * Should call gigaset_bchannel_down(), when finished. */ 573 int (*close_bchannel)(struct bc_state *bcs); 574 575 int (*initbcshw)(struct bc_state *bcs); 576 577 int (*freebcshw)(struct bc_state *bcs); 578 579 void (*reinitbcshw)(struct bc_state *bcs); 580 581 int (*initcshw)(struct cardstate *cs); 582 583 void (*freecshw)(struct cardstate *cs); 584 585 /* Called from common.c/interface.c for additional serial port 586 control */ 587 int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state, 588 unsigned new_state); 589 int (*baud_rate)(struct cardstate *cs, unsigned cflag); 590 int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag); 591 592 /* Called from LL interface to put an skb into the send-queue. 593 * After sending is completed, gigaset_skb_sent() must be called 594 * with the skb's link layer header preserved. */ 595 int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb); 596 597 /* Called from ev-layer.c to process a block of data 598 * received through the common/control channel. */ 599 void (*handle_input)(struct inbuf_t *inbuf); 600 601}; 602 603/* = Common structures and definitions ======================================= 604 */ 605 606/* Parser states for DLE-Event: 607 * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "." 608 * <DLE_FLAG>: 0x10 609 * <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+ 610 */ 611#define DLE_FLAG 0x10 612 613/* =========================================================================== 614 * Functions implemented in asyncdata.c 615 */ 616 617/* Called from LL interface to put an skb into the send queue. */ 618int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb); 619 620/* Called from ev-layer.c to process a block of data 621 * received through the common/control channel. */ 622void gigaset_m10x_input(struct inbuf_t *inbuf); 623 624/* =========================================================================== 625 * Functions implemented in isocdata.c 626 */ 627 628/* Called from LL interface to put an skb into the send queue. */ 629int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb); 630 631/* Called from ev-layer.c to process a block of data 632 * received through the common/control channel. */ 633void gigaset_isoc_input(struct inbuf_t *inbuf); 634 635/* Called from bas-gigaset.c to process a block of data 636 * received through the isochronous channel */ 637void gigaset_isoc_receive(unsigned char *src, unsigned count, 638 struct bc_state *bcs); 639 640/* Called from bas-gigaset.c to put a block of data 641 * into the isochronous output buffer */ 642int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len); 643 644/* Called from bas-gigaset.c to initialize the isochronous output buffer */ 645void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle); 646 647/* Called from bas-gigaset.c to retrieve a block of bytes for sending */ 648int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size); 649 650/* =========================================================================== 651 * Functions implemented in LL interface 652 */ 653 654/* Called from common.c for setting up/shutting down with the ISDN subsystem */ 655void gigaset_isdn_regdrv(void); 656void gigaset_isdn_unregdrv(void); 657int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid); 658void gigaset_isdn_unregdev(struct cardstate *cs); 659 660/* Called from hardware module to indicate completion of an skb */ 661void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb); 662void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb); 663void gigaset_isdn_rcv_err(struct bc_state *bcs); 664 665/* Called from common.c/ev-layer.c to indicate events relevant to the LL */ 666void gigaset_isdn_start(struct cardstate *cs); 667void gigaset_isdn_stop(struct cardstate *cs); 668int gigaset_isdn_icall(struct at_state_t *at_state); 669void gigaset_isdn_connD(struct bc_state *bcs); 670void gigaset_isdn_hupD(struct bc_state *bcs); 671void gigaset_isdn_connB(struct bc_state *bcs); 672void gigaset_isdn_hupB(struct bc_state *bcs); 673 674/* =========================================================================== 675 * Functions implemented in ev-layer.c 676 */ 677 678/* tasklet called from common.c to process queued events */ 679void gigaset_handle_event(unsigned long data); 680 681/* called from isocdata.c / asyncdata.c 682 * when a complete modem response line has been received */ 683void gigaset_handle_modem_response(struct cardstate *cs); 684 685/* =========================================================================== 686 * Functions implemented in proc.c 687 */ 688 689/* initialize sysfs for device */ 690void gigaset_init_dev_sysfs(struct cardstate *cs); 691void gigaset_free_dev_sysfs(struct cardstate *cs); 692 693/* =========================================================================== 694 * Functions implemented in common.c/gigaset.h 695 */ 696 697void gigaset_bcs_reinit(struct bc_state *bcs); 698void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs, 699 struct cardstate *cs, int cid); 700int gigaset_get_channel(struct bc_state *bcs); 701struct bc_state *gigaset_get_free_channel(struct cardstate *cs); 702void gigaset_free_channel(struct bc_state *bcs); 703int gigaset_get_channels(struct cardstate *cs); 704void gigaset_free_channels(struct cardstate *cs); 705void gigaset_block_channels(struct cardstate *cs); 706 707/* Allocate and initialize driver structure. */ 708struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors, 709 const char *procname, 710 const char *devname, 711 const struct gigaset_ops *ops, 712 struct module *owner); 713 714/* Deallocate driver structure. */ 715void gigaset_freedriver(struct gigaset_driver *drv); 716void gigaset_debugdrivers(void); 717struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty); 718struct cardstate *gigaset_get_cs_by_id(int id); 719void gigaset_blockdriver(struct gigaset_driver *drv); 720 721/* Allocate and initialize card state. Calls hardware dependent 722 gigaset_init[b]cs(). */ 723struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, 724 int onechannel, int ignoreframes, 725 int cidmode, const char *modulename); 726 727/* Free card state. Calls hardware dependent gigaset_free[b]cs(). */ 728void gigaset_freecs(struct cardstate *cs); 729 730/* Tell common.c that hardware and driver are ready. */ 731int gigaset_start(struct cardstate *cs); 732 733/* Tell common.c that the device is not present any more. */ 734void gigaset_stop(struct cardstate *cs); 735 736/* Tell common.c that the driver is being unloaded. */ 737int gigaset_shutdown(struct cardstate *cs); 738 739/* Tell common.c that an skb has been sent. */ 740void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb); 741 742/* Append event to the queue. 743 * Returns NULL on failure or a pointer to the event on success. 744 * ptr must be kmalloc()ed (and not be freed by the caller). 745 */ 746struct event_t *gigaset_add_event(struct cardstate *cs, 747 struct at_state_t *at_state, int type, 748 void *ptr, int parameter, void *arg); 749 750/* Called on CONFIG1 command from frontend. */ 751int gigaset_enterconfigmode(struct cardstate *cs); 752 753/* cs->lock must not be locked */ 754static inline void gigaset_schedule_event(struct cardstate *cs) 755{ 756 unsigned long flags; 757 spin_lock_irqsave(&cs->lock, flags); 758 if (cs->running) 759 tasklet_schedule(&cs->event_tasklet); 760 spin_unlock_irqrestore(&cs->lock, flags); 761} 762 763/* Tell common.c that B channel has been closed. */ 764/* cs->lock must not be locked */ 765static inline void gigaset_bchannel_down(struct bc_state *bcs) 766{ 767 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL); 768 gigaset_schedule_event(bcs->cs); 769} 770 771/* Tell common.c that B channel has been opened. */ 772/* cs->lock must not be locked */ 773static inline void gigaset_bchannel_up(struct bc_state *bcs) 774{ 775 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL); 776 gigaset_schedule_event(bcs->cs); 777} 778 779/* set up next receive skb for data mode */ 780static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs) 781{ 782 struct cardstate *cs = bcs->cs; 783 unsigned short hw_hdr_len = cs->hw_hdr_len; 784 785 if (bcs->ignore) { 786 bcs->rx_skb = NULL; 787 } else { 788 bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len); 789 if (bcs->rx_skb == NULL) 790 dev_warn(cs->dev, "could not allocate skb\n"); 791 else 792 skb_reserve(bcs->rx_skb, hw_hdr_len); 793 } 794 return bcs->rx_skb; 795} 796 797/* append received bytes to inbuf */ 798int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src, 799 unsigned numbytes); 800 801/* =========================================================================== 802 * Functions implemented in interface.c 803 */ 804 805/* initialize interface */ 806void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname, 807 const char *devname); 808/* release interface */ 809void gigaset_if_freedriver(struct gigaset_driver *drv); 810/* add minor */ 811void gigaset_if_init(struct cardstate *cs); 812/* remove minor */ 813void gigaset_if_free(struct cardstate *cs); 814/* device received data */ 815void gigaset_if_receive(struct cardstate *cs, 816 unsigned char *buffer, size_t len); 817 818#endif 819