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; /* associated LL application */
407 int apconnstate; /* LL application connection state */
412 struct gigaset_driver *driver;
413 unsigned minor_index;
415 struct device *tty_dev;
418 const struct gigaset_ops *ops;
420 /* Stuff to handle communication */
421 wait_queue_head_t waitqueue;
423 int mode; /* see M_XXXX */
424 int mstate; /* Modem state: see MS_XXXX */
425 /* only changed by the event layer */
429 struct bc_state *bcs; /* Array of struct bc_state */
431 int onechannel; /* data and commands transmitted in one
435 struct at_state_t at_state; /* at_state_t for cid == 0 */
436 struct list_head temp_at_states;/* list of temporary "struct
437 at_state_t"s without B channel */
439 struct inbuf_t *inbuf;
441 struct cmdbuf_t *cmdbuf, *lastcmdbuf;
443 unsigned curlen, cmdbytes;
446 struct tty_struct *tty;
447 struct tasklet_struct if_wake_tasklet;
448 unsigned control_state;
453 unsigned running; /* !=0 if events are handled */
454 unsigned connected; /* !=0 if hardware is connected */
455 unsigned isdn_up; /* !=0 after gigaset_isdn_start() */
459 int myid; /* id for communication with LL */
460 void *iif; /* LL interface structure */
461 unsigned short hw_hdr_len; /* headroom needed in data skbs */
463 struct reply_t *tabnocid;
464 struct reply_t *tabcid;
466 int ignoreframes; /* frames to ignore after setting up the
468 struct mutex mutex; /* locks this structure:
469 * connected is not changed,
470 * hardware_up is not changed,
471 * MState is not changed to or from
474 struct timer_list timer;
476 int dle; /* !=0 if DLE mode is active
477 (ZDLE=1 received -- M10x only) */
478 int cur_at_seq; /* sequence of AT commands being
480 int curchannel; /* channel those commands are meant
482 int commands_pending; /* flag(s) in xxx.commands_pending have
484 struct tasklet_struct event_tasklet;
485 /* tasklet for serializing AT commands.
487 * -> for modem reponses (and
488 * incoming data for M10x)
490 * -> after setting bits in
491 * xxx.at_state.pending_command
492 * (e.g. command from LL) */
493 struct tasklet_struct write_tasklet;
494 /* tasklet for serial output
495 * (not used in base driver) */
498 struct event_t events[MAX_EVENTS];
499 unsigned ev_tail, ev_head;
502 /* current modem response */
503 unsigned char respdata[MAX_RESP_SIZE+1];
506 /* private data of hardware drivers */
508 struct usb_cardstate *usb; /* USB hardware driver (m105) */
509 struct ser_cardstate *ser; /* serial hardware driver */
510 struct bas_cardstate *bas; /* USB hardware driver (base) */
514 struct gigaset_driver {
515 struct list_head list;
516 spinlock_t lock; /* locks minor tables and blocked */
517 struct tty_driver *tty;
521 struct cardstate *cs;
524 const struct gigaset_ops *ops;
525 struct module *owner;
529 struct cmdbuf_t *next, *prev;
531 struct tasklet_struct *wake_tasklet;
532 unsigned char buf[0];
535 struct bas_bc_state {
536 /* isochronous output state */
539 spinlock_t isooutlock;
540 struct isow_urbctx_t isoouturbs[BAS_OUTURBS];
541 struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl;
542 struct isowbuf_t *isooutbuf;
543 unsigned numsub; /* submitted URB counter
544 (for diagnostic messages only) */
545 struct tasklet_struct sent_tasklet;
547 /* isochronous input state */
548 spinlock_t isoinlock;
549 struct urb *isoinurbs[BAS_INURBS];
550 unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
551 struct urb *isoindone; /* completed isoc read URB */
552 int isoinstatus; /* status of completed URB */
553 int loststatus; /* status of dropped URB */
554 unsigned isoinlost; /* number of bytes lost */
555 /* state of bit unstuffing algorithm
556 (in addition to BC_state.inputstate) */
557 unsigned seqlen; /* number of '1' bits not yet
559 unsigned inbyte, inbits; /* collected bits for next byte */
561 unsigned goodbytes; /* bytes correctly received */
562 unsigned alignerrs; /* frames with incomplete byte at end */
563 unsigned fcserrs; /* FCS errors */
564 unsigned frameerrs; /* framing errors */
565 unsigned giants; /* long frames */
566 unsigned runts; /* short frames */
567 unsigned aborts; /* HDLC aborts */
568 unsigned shared0s; /* '0' bits shared between flags */
569 unsigned stolen0s; /* '0' stuff bits also serving as
571 struct tasklet_struct rcvd_tasklet;
575 /* Called from ev-layer.c/interface.c for sending AT commands to the
577 int (*write_cmd)(struct cardstate *cs,
578 const unsigned char *buf, int len,
579 struct tasklet_struct *wake_tasklet);
581 /* Called from interface.c for additional device control */
582 int (*write_room)(struct cardstate *cs);
583 int (*chars_in_buffer)(struct cardstate *cs);
584 int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
586 /* Called from ev-layer.c after setting up connection
587 * Should call gigaset_bchannel_up(), when finished. */
588 int (*init_bchannel)(struct bc_state *bcs);
590 /* Called from ev-layer.c after hanging up
591 * Should call gigaset_bchannel_down(), when finished. */
592 int (*close_bchannel)(struct bc_state *bcs);
594 /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
595 int (*initbcshw)(struct bc_state *bcs);
597 /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
598 int (*freebcshw)(struct bc_state *bcs);
600 /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
601 void (*reinitbcshw)(struct bc_state *bcs);
603 /* Called by gigaset_initcs() for setting up cs->hw.xxx */
604 int (*initcshw)(struct cardstate *cs);
606 /* Called by gigaset_freecs() for freeing cs->hw.xxx */
607 void (*freecshw)(struct cardstate *cs);
609 /* Called from common.c/interface.c for additional serial port
611 int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
613 int (*baud_rate)(struct cardstate *cs, unsigned cflag);
614 int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
616 /* Called from LL interface to put an skb into the send-queue.
617 * After sending is completed, gigaset_skb_sent() must be called
618 * with the skb's link layer header preserved. */
619 int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
621 /* Called from ev-layer.c to process a block of data
622 * received through the common/control channel. */
623 void (*handle_input)(struct inbuf_t *inbuf);
627 /* = Common structures and definitions =======================================
630 /* Parser states for DLE-Event:
631 * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
633 * <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+
635 #define DLE_FLAG 0x10
637 /* ===========================================================================
638 * Functions implemented in asyncdata.c
641 /* Called from LL interface to put an skb into the send queue. */
642 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
644 /* Called from ev-layer.c to process a block of data
645 * received through the common/control channel. */
646 void gigaset_m10x_input(struct inbuf_t *inbuf);
648 /* ===========================================================================
649 * Functions implemented in isocdata.c
652 /* Called from LL interface to put an skb into the send queue. */
653 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
655 /* Called from ev-layer.c to process a block of data
656 * received through the common/control channel. */
657 void gigaset_isoc_input(struct inbuf_t *inbuf);
659 /* Called from bas-gigaset.c to process a block of data
660 * received through the isochronous channel */
661 void gigaset_isoc_receive(unsigned char *src, unsigned count,
662 struct bc_state *bcs);
664 /* Called from bas-gigaset.c to put a block of data
665 * into the isochronous output buffer */
666 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
668 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
669 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
671 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
672 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
674 /* ===========================================================================
675 * Functions implemented in LL interface
678 /* Called from common.c for setting up/shutting down with the ISDN subsystem */
679 void gigaset_isdn_regdrv(void);
680 void gigaset_isdn_unregdrv(void);
681 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
682 void gigaset_isdn_unregdev(struct cardstate *cs);
684 /* Called from hardware module to indicate completion of an skb */
685 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
686 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
687 void gigaset_isdn_rcv_err(struct bc_state *bcs);
689 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
690 void gigaset_isdn_start(struct cardstate *cs);
691 void gigaset_isdn_stop(struct cardstate *cs);
692 int gigaset_isdn_icall(struct at_state_t *at_state);
693 void gigaset_isdn_connD(struct bc_state *bcs);
694 void gigaset_isdn_hupD(struct bc_state *bcs);
695 void gigaset_isdn_connB(struct bc_state *bcs);
696 void gigaset_isdn_hupB(struct bc_state *bcs);
698 /* ===========================================================================
699 * Functions implemented in ev-layer.c
702 /* tasklet called from common.c to process queued events */
703 void gigaset_handle_event(unsigned long data);
705 /* called from isocdata.c / asyncdata.c
706 * when a complete modem response line has been received */
707 void gigaset_handle_modem_response(struct cardstate *cs);
709 /* ===========================================================================
710 * Functions implemented in proc.c
713 /* initialize sysfs for device */
714 void gigaset_init_dev_sysfs(struct cardstate *cs);
715 void gigaset_free_dev_sysfs(struct cardstate *cs);
717 /* ===========================================================================
718 * Functions implemented in common.c/gigaset.h
721 void gigaset_bcs_reinit(struct bc_state *bcs);
722 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
723 struct cardstate *cs, int cid);
724 int gigaset_get_channel(struct bc_state *bcs);
725 struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
726 void gigaset_free_channel(struct bc_state *bcs);
727 int gigaset_get_channels(struct cardstate *cs);
728 void gigaset_free_channels(struct cardstate *cs);
729 void gigaset_block_channels(struct cardstate *cs);
731 /* Allocate and initialize driver structure. */
732 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
733 const char *procname,
735 const struct gigaset_ops *ops,
736 struct module *owner);
738 /* Deallocate driver structure. */
739 void gigaset_freedriver(struct gigaset_driver *drv);
740 void gigaset_debugdrivers(void);
741 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
742 struct cardstate *gigaset_get_cs_by_id(int id);
743 void gigaset_blockdriver(struct gigaset_driver *drv);
745 /* Allocate and initialize card state. Calls hardware dependent
746 gigaset_init[b]cs(). */
747 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
748 int onechannel, int ignoreframes,
749 int cidmode, const char *modulename);
751 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
752 void gigaset_freecs(struct cardstate *cs);
754 /* Tell common.c that hardware and driver are ready. */
755 int gigaset_start(struct cardstate *cs);
757 /* Tell common.c that the device is not present any more. */
758 void gigaset_stop(struct cardstate *cs);
760 /* Tell common.c that the driver is being unloaded. */
761 int gigaset_shutdown(struct cardstate *cs);
763 /* Tell common.c that an skb has been sent. */
764 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
766 /* Append event to the queue.
767 * Returns NULL on failure or a pointer to the event on success.
768 * ptr must be kmalloc()ed (and not be freed by the caller).
770 struct event_t *gigaset_add_event(struct cardstate *cs,
771 struct at_state_t *at_state, int type,
772 void *ptr, int parameter, void *arg);
774 /* Called on CONFIG1 command from frontend. */
775 int gigaset_enterconfigmode(struct cardstate *cs);
777 /* cs->lock must not be locked */
778 static inline void gigaset_schedule_event(struct cardstate *cs)
781 spin_lock_irqsave(&cs->lock, flags);
783 tasklet_schedule(&cs->event_tasklet);
784 spin_unlock_irqrestore(&cs->lock, flags);
787 /* Tell common.c that B channel has been closed. */
788 /* cs->lock must not be locked */
789 static inline void gigaset_bchannel_down(struct bc_state *bcs)
791 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
792 gigaset_schedule_event(bcs->cs);
795 /* Tell common.c that B channel has been opened. */
796 /* cs->lock must not be locked */
797 static inline void gigaset_bchannel_up(struct bc_state *bcs)
799 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
800 gigaset_schedule_event(bcs->cs);
803 /* set up next receive skb for data mode */
804 static inline struct sk_buff *gigaset_new_rx_skb(struct bc_state *bcs)
806 struct cardstate *cs = bcs->cs;
807 unsigned short hw_hdr_len = cs->hw_hdr_len;
812 bcs->rx_skb = dev_alloc_skb(bcs->rx_bufsize + hw_hdr_len);
813 if (bcs->rx_skb == NULL)
814 dev_warn(cs->dev, "could not allocate skb\n");
816 skb_reserve(bcs->rx_skb, hw_hdr_len);
821 /* append received bytes to inbuf */
822 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
825 /* ===========================================================================
826 * Functions implemented in interface.c
829 /* initialize interface */
830 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
831 const char *devname);
832 /* release interface */
833 void gigaset_if_freedriver(struct gigaset_driver *drv);
835 void gigaset_if_init(struct cardstate *cs);
837 void gigaset_if_free(struct cardstate *cs);
838 /* device received data */
839 void gigaset_if_receive(struct cardstate *cs,
840 unsigned char *buffer, size_t len);