2 * Siemens Gigaset 307x driver
3 * Common header file for all connection variants
5 * Written by Stefan Eilers
6 * and Hansjoerg Lipp <hjlipp@web.de>
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 * =====================================================================
19 /* define global prefix for pr_ macros in linux/kernel.h */
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
39 #define GIG_VERSION {0, 5, 0, 0}
40 #define GIG_COMPAT {0, 4, 0, 0}
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 */
45 #define MAX_EVENTS 64 /* size of event queue */
49 /* compile time options */
52 #define GIG_MAYINITONDIAL
56 #define GIG_TICK 100 /* in milliseconds */
58 /* timeout values (unit: 1 sec) */
59 #define INIT_TIMEOUT 1
61 /* timeout values (unit: 0.1 sec) */
62 #define RING_TIMEOUT 3 /* for additional parameters to RING */
63 #define BAS_TIMEOUT 20 /* for response to Base USB ops */
64 #define ATRDY_TIMEOUT 3 /* for HD_READY_SEND_ATDATA */
66 #define BAS_RETRY 3 /* max. retries for base USB ops */
70 extern int gigaset_debuglevel; /* "needs" cast to (enum debuglevel) */
72 /* debug flags, combine by adding/bitwise OR */
74 DEBUG_INTR = 0x00008, /* interrupt processing */
75 DEBUG_CMD = 0x00020, /* sent/received LL commands */
76 DEBUG_STREAM = 0x00040, /* application data stream I/O events */
77 DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
78 DEBUG_LLDATA = 0x00100, /* sent/received LL data */
79 DEBUG_EVENT = 0x00200, /* event processing */
80 DEBUG_DRIVER = 0x00400, /* driver structure */
81 DEBUG_HDLC = 0x00800, /* M10x HDLC processing */
82 DEBUG_CHANNEL = 0x01000, /* channel allocation/deallocation */
83 DEBUG_TRANSCMD = 0x02000, /* AT-COMMANDS+RESPONSES */
84 DEBUG_MCMD = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
85 DEBUG_INIT = 0x08000, /* (de)allocation+initialization of data
87 DEBUG_SUSPEND = 0x10000, /* suspend/resume processing */
88 DEBUG_OUTPUT = 0x20000, /* output to device */
89 DEBUG_ISO = 0x40000, /* isochronous transfers */
90 DEBUG_IF = 0x80000, /* character device operations */
91 DEBUG_USBREQ = 0x100000, /* USB communication (except payload
93 DEBUG_LOCKCMD = 0x200000, /* AT commands and responses when
96 DEBUG_ANY = 0x3fffff, /* print message if any of the others is
100 #ifdef CONFIG_GIGASET_DEBUG
102 #define gig_dbg(level, format, arg...) \
104 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
105 printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
108 #define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
112 #define gig_dbg(level, format, arg...) do {} while (0)
113 #define DEBUG_DEFAULT 0
117 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
118 size_t len, const unsigned char *buf);
120 /* connection state */
122 #define ZSAU_DISCONNECT_IND 4
123 #define ZSAU_OUTGOING_CALL_PROCEEDING 1
124 #define ZSAU_PROCEEDING 1
125 #define ZSAU_CALL_DELIVERED 2
126 #define ZSAU_ACTIVE 3
128 #define ZSAU_DISCONNECT_REQ 6
129 #define ZSAU_UNKNOWN -1
131 /* USB control transfer requests */
132 #define OUT_VENDOR_REQ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
133 #define IN_VENDOR_REQ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
135 /* interrupt pipe messages */
136 #define HD_B1_FLOW_CONTROL 0x80
137 #define HD_B2_FLOW_CONTROL 0x81
138 #define HD_RECEIVEATDATA_ACK (0x35) /* 3070 */
139 #define HD_READY_SEND_ATDATA (0x36) /* 3070 */
140 #define HD_OPEN_ATCHANNEL_ACK (0x37) /* 3070 */
141 #define HD_CLOSE_ATCHANNEL_ACK (0x38) /* 3070 */
142 #define HD_DEVICE_INIT_OK (0x11) /* ISurf USB + 3070 */
143 #define HD_OPEN_B1CHANNEL_ACK (0x51) /* ISurf USB + 3070 */
144 #define HD_OPEN_B2CHANNEL_ACK (0x52) /* ISurf USB + 3070 */
145 #define HD_CLOSE_B1CHANNEL_ACK (0x53) /* ISurf USB + 3070 */
146 #define HD_CLOSE_B2CHANNEL_ACK (0x54) /* ISurf USB + 3070 */
147 #define HD_SUSPEND_END (0x61) /* ISurf USB */
148 #define HD_RESET_INTERRUPT_PIPE_ACK (0xFF) /* ISurf USB + 3070 */
150 /* control requests */
151 #define HD_OPEN_B1CHANNEL (0x23) /* ISurf USB + 3070 */
152 #define HD_CLOSE_B1CHANNEL (0x24) /* ISurf USB + 3070 */
153 #define HD_OPEN_B2CHANNEL (0x25) /* ISurf USB + 3070 */
154 #define HD_CLOSE_B2CHANNEL (0x26) /* ISurf USB + 3070 */
155 #define HD_RESET_INTERRUPT_PIPE (0x27) /* ISurf USB + 3070 */
156 #define HD_DEVICE_INIT_ACK (0x34) /* ISurf USB + 3070 */
157 #define HD_WRITE_ATMESSAGE (0x12) /* 3070 */
158 #define HD_READ_ATMESSAGE (0x13) /* 3070 */
159 #define HD_OPEN_ATCHANNEL (0x28) /* 3070 */
160 #define HD_CLOSE_ATCHANNEL (0x29) /* 3070 */
162 /* number of B channels supported by base driver */
163 #define BAS_CHANNELS 2
165 /* USB frames for isochronous transfer */
166 #define BAS_FRAMETIME 1 /* number of milliseconds between frames */
167 #define BAS_NUMFRAMES 8 /* number of frames per URB */
168 #define BAS_MAXFRAME 16 /* allocated bytes per frame */
169 #define BAS_NORMFRAME 8 /* send size without flow control */
170 #define BAS_HIGHFRAME 10 /* " " with positive flow control */
171 #define BAS_LOWFRAME 5 /* " " with negative flow control */
172 #define BAS_CORRFRAMES 4 /* flow control multiplicator */
174 #define BAS_INBUFSIZE (BAS_MAXFRAME * BAS_NUMFRAMES)
175 /* size of isoc in buf per URB */
176 #define BAS_OUTBUFSIZE 4096 /* size of common isoc out buffer */
177 #define BAS_OUTBUFPAD BAS_MAXFRAME /* size of pad area for isoc out buf */
180 #define BAS_OUTURBS 3
182 /* variable commands in struct bc_state */
193 /* variables in struct at_state_t */
207 #define EV_TIMEOUT -105
208 #define EV_IF_VER -106
209 #define EV_PROC_CIDMODE -107
210 #define EV_SHUTDOWN -108
211 #define EV_START -110
213 #define EV_IF_LOCK -112
214 #define EV_ACCEPT -114
217 #define EV_BC_OPEN -117
218 #define EV_BC_CLOSED -118
221 #define INS_command 0x0001 /* receiving messages (not payload data) */
222 #define INS_DLE_char 0x0002 /* DLE flag received (in DLE mode) */
223 #define INS_byte_stuff 0x0004
224 #define INS_have_data 0x0008
225 #define INS_DLE_command 0x0020 /* DLE message start (<DLE> X) received */
226 #define INS_flag_hunt 0x0040
229 #define CHS_D_UP 0x01
230 #define CHS_B_UP 0x02
231 #define CHS_NOTIFY_LL 0x04
233 #define ICALL_REJECT 0
234 #define ICALL_ACCEPT 1
235 #define ICALL_IGNORE 2
238 #define MS_UNINITIALIZED 0
241 #define MS_SHUTDOWN 3
253 #define SM_ISDN 1 /* default */
255 /* layer 2 protocols (AT^SBPR=...) */
261 struct gigaset_driver;
263 struct usb_cardstate;
264 struct ser_cardstate;
265 struct bas_cardstate;
273 int resp_code; /* RSP_XXXX */
274 int min_ConState; /* <0 => ignore */
275 int max_ConState; /* <0 => ignore */
276 int parameter; /* e.g. ZSAU_XXXX <0: ignore*/
277 int new_ConState; /* <0 => ignore */
278 int timeout; /* >0 => *HZ; <=0 => TOUT_XXXX*/
279 int action[MAXACT]; /* ACT_XXXX */
280 char *command; /* NULL==none */
283 extern struct reply_t gigaset_tab_cid[];
284 extern struct reply_t gigaset_tab_nocid[];
287 struct cardstate *cs;
290 unsigned char data[RBUFSIZE];
293 /* isochronous write buffer structure
294 * circular buffer with pad area for extraction of complete USB frames
295 * - data[read..nextread-1] is valid data already submitted to the USB subsystem
296 * - data[nextread..write-1] is valid data yet to be sent
297 * - data[write] is the next byte to write to
298 * - in byte-oriented L2 procotols, it is completely free
299 * - in bit-oriented L2 procotols, it may contain a partial byte of valid data
300 * - data[write+1..read-1] is free
301 * - wbits is the number of valid data bits in data[write], starting at the LSB
302 * - writesem is the semaphore for writing to the buffer:
303 * if writesem <= 0, data[write..read-1] is currently being written to
304 * - idle contains the byte value to repeat when the end of valid data is
305 * reached; if nextread==write (buffer contains no data to send), either the
306 * BAS_OUTBUFPAD bytes immediately before data[write] (if
307 * write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
308 * are also filled with that value
316 unsigned char data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
320 /* isochronous write URB context structure
321 * data to be stored along with the URB and retrieved when it is returned
322 * as completed by the USB subsystem
323 * - urb: pointer to the URB itself
324 * - bcs: pointer to the B Channel control structure
325 * - limit: end of write buffer area covered by this URB
326 * - status: URB completion status
328 struct isow_urbctx_t {
330 struct bc_state *bcs;
335 /* AT state structure
336 * data associated with the state of an ISDN connection, whether or not
337 * it is currently assigned a B channel
340 struct list_head list;
343 unsigned timer_index;
344 unsigned long timer_expires;
346 unsigned int ConState; /* State of connection */
347 struct reply_t *replystruct;
349 int int_var[VAR_NUM]; /* see VAR_XXXX */
350 char *str_var[STR_NUM]; /* see STR_XXXX */
351 unsigned pending_commands; /* see PC_XXXX */
354 struct cardstate *cs;
355 struct bc_state *bcs;
363 struct at_state_t *at_state;
366 /* This buffer holds all information about the used B-Channel */
368 struct sk_buff *tx_skb; /* Current transfer buffer to modem */
369 struct sk_buff_head squeue; /* B-Channel send Queue */
371 /* Variables for debugging .. */
372 int corrupted; /* Counter for corrupted packages */
373 int trans_down; /* Counter of packages (downstream) */
374 int trans_up; /* Counter of packages (upstream) */
376 struct at_state_t at_state;
379 unsigned rx_bufsize; /* max size accepted by application */
380 struct sk_buff *rx_skb;
382 int inputstate; /* see INS_XXXX */
386 struct cardstate *cs;
388 unsigned chstate; /* bitmap (CHS_*) */
390 unsigned proto2; /* layer 2 protocol (L2_*) */
391 char *commands[AT_NUM]; /* see AT_XXXX */
393 #ifdef CONFIG_GIGASET_DEBUG
399 /* private data of hardware drivers */
401 struct ser_bc_state *ser; /* serial hardware driver */
402 struct usb_bc_state *usb; /* usb hardware driver (m105) */
403 struct bas_bc_state *bas; /* usb hardware driver (base) */
406 void *ap; /* LL application structure */
410 struct gigaset_driver *driver;
411 unsigned minor_index;
413 struct device *tty_dev;
416 const struct gigaset_ops *ops;
418 /* Stuff to handle communication */
419 wait_queue_head_t waitqueue;
421 int mode; /* see M_XXXX */
422 int mstate; /* Modem state: see MS_XXXX */
423 /* only changed by the event layer */
427 struct bc_state *bcs; /* Array of struct bc_state */
429 int onechannel; /* data and commands transmitted in one
433 struct at_state_t at_state; /* at_state_t for cid == 0 */
434 struct list_head temp_at_states;/* list of temporary "struct
435 at_state_t"s without B channel */
437 struct inbuf_t *inbuf;
439 struct cmdbuf_t *cmdbuf, *lastcmdbuf;
441 unsigned curlen, cmdbytes;
444 struct tty_struct *tty;
445 struct tasklet_struct if_wake_tasklet;
446 unsigned control_state;
451 unsigned running; /* !=0 if events are handled */
452 unsigned connected; /* !=0 if hardware is connected */
453 unsigned isdn_up; /* !=0 after gigaset_isdn_start() */
457 int myid; /* id for communication with LL */
458 void *iif; /* LL interface structure */
459 unsigned short hw_hdr_len; /* headroom needed in data skbs */
461 struct reply_t *tabnocid;
462 struct reply_t *tabcid;
464 int ignoreframes; /* frames to ignore after setting up the
466 struct mutex mutex; /* locks this structure:
467 * connected is not changed,
468 * hardware_up is not changed,
469 * MState is not changed to or from
472 struct timer_list timer;
474 int dle; /* !=0 if DLE mode is active
475 (ZDLE=1 received -- M10x only) */
476 int cur_at_seq; /* sequence of AT commands being
478 int curchannel; /* channel those commands are meant
480 int commands_pending; /* flag(s) in xxx.commands_pending have
482 struct tasklet_struct event_tasklet;
483 /* tasklet for serializing AT commands.
485 * -> for modem reponses (and
486 * incoming data for M10x)
488 * -> after setting bits in
489 * xxx.at_state.pending_command
490 * (e.g. command from LL) */
491 struct tasklet_struct write_tasklet;
492 /* tasklet for serial output
493 * (not used in base driver) */
496 struct event_t events[MAX_EVENTS];
497 unsigned ev_tail, ev_head;
500 /* current modem response */
501 unsigned char respdata[MAX_RESP_SIZE+1];
504 /* private data of hardware drivers */
506 struct usb_cardstate *usb; /* USB hardware driver (m105) */
507 struct ser_cardstate *ser; /* serial hardware driver */
508 struct bas_cardstate *bas; /* USB hardware driver (base) */
512 struct gigaset_driver {
513 struct list_head list;
514 spinlock_t lock; /* locks minor tables and blocked */
515 struct tty_driver *tty;
519 struct cardstate *cs;
522 const struct gigaset_ops *ops;
523 struct module *owner;
527 struct cmdbuf_t *next, *prev;
529 struct tasklet_struct *wake_tasklet;
530 unsigned char buf[0];
533 struct bas_bc_state {
534 /* isochronous output state */
537 spinlock_t isooutlock;
538 struct isow_urbctx_t isoouturbs[BAS_OUTURBS];
539 struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl;
540 struct isowbuf_t *isooutbuf;
541 unsigned numsub; /* submitted URB counter
542 (for diagnostic messages only) */
543 struct tasklet_struct sent_tasklet;
545 /* isochronous input state */
546 spinlock_t isoinlock;
547 struct urb *isoinurbs[BAS_INURBS];
548 unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
549 struct urb *isoindone; /* completed isoc read URB */
550 int isoinstatus; /* status of completed URB */
551 int loststatus; /* status of dropped URB */
552 unsigned isoinlost; /* number of bytes lost */
553 /* state of bit unstuffing algorithm
554 (in addition to BC_state.inputstate) */
555 unsigned seqlen; /* number of '1' bits not yet
557 unsigned inbyte, inbits; /* collected bits for next byte */
559 unsigned goodbytes; /* bytes correctly received */
560 unsigned alignerrs; /* frames with incomplete byte at end */
561 unsigned fcserrs; /* FCS errors */
562 unsigned frameerrs; /* framing errors */
563 unsigned giants; /* long frames */
564 unsigned runts; /* short frames */
565 unsigned aborts; /* HDLC aborts */
566 unsigned shared0s; /* '0' bits shared between flags */
567 unsigned stolen0s; /* '0' stuff bits also serving as
569 struct tasklet_struct rcvd_tasklet;
573 /* Called from ev-layer.c/interface.c for sending AT commands to the
575 int (*write_cmd)(struct cardstate *cs,
576 const unsigned char *buf, int len,
577 struct tasklet_struct *wake_tasklet);
579 /* Called from interface.c for additional device control */
580 int (*write_room)(struct cardstate *cs);
581 int (*chars_in_buffer)(struct cardstate *cs);
582 int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
584 /* Called from ev-layer.c after setting up connection
585 * Should call gigaset_bchannel_up(), when finished. */
586 int (*init_bchannel)(struct bc_state *bcs);
588 /* Called from ev-layer.c after hanging up
589 * Should call gigaset_bchannel_down(), when finished. */
590 int (*close_bchannel)(struct bc_state *bcs);
592 /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
593 int (*initbcshw)(struct bc_state *bcs);
595 /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
596 int (*freebcshw)(struct bc_state *bcs);
598 /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
599 void (*reinitbcshw)(struct bc_state *bcs);
601 /* Called by gigaset_initcs() for setting up cs->hw.xxx */
602 int (*initcshw)(struct cardstate *cs);
604 /* Called by gigaset_freecs() for freeing cs->hw.xxx */
605 void (*freecshw)(struct cardstate *cs);
607 /* Called from common.c/interface.c for additional serial port
609 int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
611 int (*baud_rate)(struct cardstate *cs, unsigned cflag);
612 int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
614 /* Called from LL interface to put an skb into the send-queue.
615 * After sending is completed, gigaset_skb_sent() must be called
616 * with the skb's link layer header preserved. */
617 int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
619 /* Called from ev-layer.c to process a block of data
620 * received through the common/control channel. */
621 void (*handle_input)(struct inbuf_t *inbuf);
625 /* = Common structures and definitions =======================================
628 /* Parser states for DLE-Event:
629 * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
631 * <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+
633 #define DLE_FLAG 0x10
635 /* ===========================================================================
636 * Functions implemented in asyncdata.c
639 /* Called from LL interface to put an skb into the send queue. */
640 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
642 /* Called from ev-layer.c to process a block of data
643 * received through the common/control channel. */
644 void gigaset_m10x_input(struct inbuf_t *inbuf);
646 /* ===========================================================================
647 * Functions implemented in isocdata.c
650 /* Called from LL interface to put an skb into the send queue. */
651 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
653 /* Called from ev-layer.c to process a block of data
654 * received through the common/control channel. */
655 void gigaset_isoc_input(struct inbuf_t *inbuf);
657 /* Called from bas-gigaset.c to process a block of data
658 * received through the isochronous channel */
659 void gigaset_isoc_receive(unsigned char *src, unsigned count,
660 struct bc_state *bcs);
662 /* Called from bas-gigaset.c to put a block of data
663 * into the isochronous output buffer */
664 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
666 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
667 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
669 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
670 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
672 /* ===========================================================================
673 * Functions implemented in LL interface
676 /* Called from common.c for setting up/shutting down with the ISDN subsystem */
677 void gigaset_isdn_regdrv(void);
678 void gigaset_isdn_unregdrv(void);
679 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
680 void gigaset_isdn_unregdev(struct cardstate *cs);
682 /* Called from hardware module to indicate completion of an skb */
683 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
684 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
685 void gigaset_isdn_rcv_err(struct bc_state *bcs);
687 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
688 void gigaset_isdn_start(struct cardstate *cs);
689 void gigaset_isdn_stop(struct cardstate *cs);
690 int gigaset_isdn_icall(struct at_state_t *at_state);
691 void gigaset_isdn_connD(struct bc_state *bcs);
692 void gigaset_isdn_hupD(struct bc_state *bcs);
693 void gigaset_isdn_connB(struct bc_state *bcs);
694 void gigaset_isdn_hupB(struct bc_state *bcs);
696 /* ===========================================================================
697 * Functions implemented in ev-layer.c
700 /* tasklet called from common.c to process queued events */
701 void gigaset_handle_event(unsigned long data);
703 /* called from isocdata.c / asyncdata.c
704 * when a complete modem response line has been received */
705 void gigaset_handle_modem_response(struct cardstate *cs);
707 /* ===========================================================================
708 * Functions implemented in proc.c
711 /* initialize sysfs for device */
712 void gigaset_init_dev_sysfs(struct cardstate *cs);
713 void gigaset_free_dev_sysfs(struct cardstate *cs);
715 /* ===========================================================================
716 * Functions implemented in common.c/gigaset.h
719 void gigaset_bcs_reinit(struct bc_state *bcs);
720 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
721 struct cardstate *cs, int cid);
722 int gigaset_get_channel(struct bc_state *bcs);
723 struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
724 void gigaset_free_channel(struct bc_state *bcs);
725 int gigaset_get_channels(struct cardstate *cs);
726 void gigaset_free_channels(struct cardstate *cs);
727 void gigaset_block_channels(struct cardstate *cs);
729 /* Allocate and initialize driver structure. */
730 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
731 const char *procname,
733 const struct gigaset_ops *ops,
734 struct module *owner);
736 /* Deallocate driver structure. */
737 void gigaset_freedriver(struct gigaset_driver *drv);
738 void gigaset_debugdrivers(void);
739 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
740 struct cardstate *gigaset_get_cs_by_id(int id);
741 void gigaset_blockdriver(struct gigaset_driver *drv);
743 /* Allocate and initialize card state. Calls hardware dependent
744 gigaset_init[b]cs(). */
745 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
746 int onechannel, int ignoreframes,
747 int cidmode, const char *modulename);
749 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
750 void gigaset_freecs(struct cardstate *cs);
752 /* Tell common.c that hardware and driver are ready. */
753 int gigaset_start(struct cardstate *cs);
755 /* Tell common.c that the device is not present any more. */
756 void gigaset_stop(struct cardstate *cs);
758 /* Tell common.c that the driver is being unloaded. */
759 int gigaset_shutdown(struct cardstate *cs);
761 /* Tell common.c that an skb has been sent. */
762 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
764 /* Append event to the queue.
765 * Returns NULL on failure or a pointer to the event on success.
766 * ptr must be kmalloc()ed (and not be freed by the caller).
768 struct event_t *gigaset_add_event(struct cardstate *cs,
769 struct at_state_t *at_state, int type,
770 void *ptr, int parameter, void *arg);
772 /* Called on CONFIG1 command from frontend. */
773 int gigaset_enterconfigmode(struct cardstate *cs);
775 /* cs->lock must not be locked */
776 static inline void gigaset_schedule_event(struct cardstate *cs)
779 spin_lock_irqsave(&cs->lock, flags);
781 tasklet_schedule(&cs->event_tasklet);
782 spin_unlock_irqrestore(&cs->lock, flags);
785 /* Tell common.c that B channel has been closed. */
786 /* cs->lock must not be locked */
787 static inline void gigaset_bchannel_down(struct bc_state *bcs)
789 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
790 gigaset_schedule_event(bcs->cs);
793 /* Tell common.c that B channel has been opened. */
794 /* cs->lock must not be locked */
795 static inline void gigaset_bchannel_up(struct bc_state *bcs)
797 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
798 gigaset_schedule_event(bcs->cs);
801 /* set up next receive skb for data mode */
802 static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs)
804 struct cardstate *cs = bcs->cs;
805 unsigned short hw_hdr_len = cs->hw_hdr_len;
810 bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len);
811 if (bcs->rx_skb == NULL)
812 dev_warn(cs->dev, "could not allocate skb\n");
814 skb_reserve(bcs->rx_skb, hw_hdr_len);
819 /* append received bytes to inbuf */
820 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
823 /* ===========================================================================
824 * Functions implemented in interface.c
827 /* initialize interface */
828 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
829 const char *devname);
830 /* release interface */
831 void gigaset_if_freedriver(struct gigaset_driver *drv);
833 void gigaset_if_init(struct cardstate *cs);
835 void gigaset_if_free(struct cardstate *cs);
836 /* device received data */
837 void gigaset_if_receive(struct cardstate *cs,
838 unsigned char *buffer, size_t len);