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 */
48 #define SBUFSIZE 4096 /* sk_buff payload size */
50 #define TRANSBUFSIZE 768 /* bytes per skb for transparent receive */
51 #define MAX_BUF_SIZE (SBUFSIZE - 2) /* Max. size of a data packet from LL */
53 /* compile time options */
56 #define GIG_MAYINITONDIAL
60 #define GIG_TICK 100 /* in milliseconds */
62 /* timeout values (unit: 1 sec) */
63 #define INIT_TIMEOUT 1
65 /* timeout values (unit: 0.1 sec) */
66 #define RING_TIMEOUT 3 /* for additional parameters to RING */
67 #define BAS_TIMEOUT 20 /* for response to Base USB ops */
68 #define ATRDY_TIMEOUT 3 /* for HD_READY_SEND_ATDATA */
70 #define BAS_RETRY 3 /* max. retries for base USB ops */
74 extern int gigaset_debuglevel; /* "needs" cast to (enum debuglevel) */
76 /* debug flags, combine by adding/bitwise OR */
78 DEBUG_INTR = 0x00008, /* interrupt processing */
79 DEBUG_CMD = 0x00020, /* sent/received LL commands */
80 DEBUG_STREAM = 0x00040, /* application data stream I/O events */
81 DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
82 DEBUG_LLDATA = 0x00100, /* sent/received LL data */
83 DEBUG_EVENT = 0x00200, /* event processing */
84 DEBUG_DRIVER = 0x00400, /* driver structure */
85 DEBUG_HDLC = 0x00800, /* M10x HDLC processing */
86 DEBUG_CHANNEL = 0x01000, /* channel allocation/deallocation */
87 DEBUG_TRANSCMD = 0x02000, /* AT-COMMANDS+RESPONSES */
88 DEBUG_MCMD = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
89 DEBUG_INIT = 0x08000, /* (de)allocation+initialization of data
91 DEBUG_SUSPEND = 0x10000, /* suspend/resume processing */
92 DEBUG_OUTPUT = 0x20000, /* output to device */
93 DEBUG_ISO = 0x40000, /* isochronous transfers */
94 DEBUG_IF = 0x80000, /* character device operations */
95 DEBUG_USBREQ = 0x100000, /* USB communication (except payload
97 DEBUG_LOCKCMD = 0x200000, /* AT commands and responses when
100 DEBUG_ANY = 0x3fffff, /* print message if any of the others is
104 #ifdef CONFIG_GIGASET_DEBUG
106 #define gig_dbg(level, format, arg...) \
108 if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
109 printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
112 #define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
116 #define gig_dbg(level, format, arg...) do {} while (0)
117 #define DEBUG_DEFAULT 0
121 void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
122 size_t len, const unsigned char *buf);
124 /* connection state */
126 #define ZSAU_DISCONNECT_IND 4
127 #define ZSAU_OUTGOING_CALL_PROCEEDING 1
128 #define ZSAU_PROCEEDING 1
129 #define ZSAU_CALL_DELIVERED 2
130 #define ZSAU_ACTIVE 3
132 #define ZSAU_DISCONNECT_REQ 6
133 #define ZSAU_UNKNOWN -1
135 /* USB control transfer requests */
136 #define OUT_VENDOR_REQ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
137 #define IN_VENDOR_REQ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
139 /* interrupt pipe messages */
140 #define HD_B1_FLOW_CONTROL 0x80
141 #define HD_B2_FLOW_CONTROL 0x81
142 #define HD_RECEIVEATDATA_ACK (0x35) /* 3070 */
143 #define HD_READY_SEND_ATDATA (0x36) /* 3070 */
144 #define HD_OPEN_ATCHANNEL_ACK (0x37) /* 3070 */
145 #define HD_CLOSE_ATCHANNEL_ACK (0x38) /* 3070 */
146 #define HD_DEVICE_INIT_OK (0x11) /* ISurf USB + 3070 */
147 #define HD_OPEN_B1CHANNEL_ACK (0x51) /* ISurf USB + 3070 */
148 #define HD_OPEN_B2CHANNEL_ACK (0x52) /* ISurf USB + 3070 */
149 #define HD_CLOSE_B1CHANNEL_ACK (0x53) /* ISurf USB + 3070 */
150 #define HD_CLOSE_B2CHANNEL_ACK (0x54) /* ISurf USB + 3070 */
151 #define HD_SUSPEND_END (0x61) /* ISurf USB */
152 #define HD_RESET_INTERRUPT_PIPE_ACK (0xFF) /* ISurf USB + 3070 */
154 /* control requests */
155 #define HD_OPEN_B1CHANNEL (0x23) /* ISurf USB + 3070 */
156 #define HD_CLOSE_B1CHANNEL (0x24) /* ISurf USB + 3070 */
157 #define HD_OPEN_B2CHANNEL (0x25) /* ISurf USB + 3070 */
158 #define HD_CLOSE_B2CHANNEL (0x26) /* ISurf USB + 3070 */
159 #define HD_RESET_INTERRUPT_PIPE (0x27) /* ISurf USB + 3070 */
160 #define HD_DEVICE_INIT_ACK (0x34) /* ISurf USB + 3070 */
161 #define HD_WRITE_ATMESSAGE (0x12) /* 3070 */
162 #define HD_READ_ATMESSAGE (0x13) /* 3070 */
163 #define HD_OPEN_ATCHANNEL (0x28) /* 3070 */
164 #define HD_CLOSE_ATCHANNEL (0x29) /* 3070 */
166 /* number of B channels supported by base driver */
167 #define BAS_CHANNELS 2
169 /* USB frames for isochronous transfer */
170 #define BAS_FRAMETIME 1 /* number of milliseconds between frames */
171 #define BAS_NUMFRAMES 8 /* number of frames per URB */
172 #define BAS_MAXFRAME 16 /* allocated bytes per frame */
173 #define BAS_NORMFRAME 8 /* send size without flow control */
174 #define BAS_HIGHFRAME 10 /* " " with positive flow control */
175 #define BAS_LOWFRAME 5 /* " " with negative flow control */
176 #define BAS_CORRFRAMES 4 /* flow control multiplicator */
178 #define BAS_INBUFSIZE (BAS_MAXFRAME * BAS_NUMFRAMES)
179 /* size of isoc in buf per URB */
180 #define BAS_OUTBUFSIZE 4096 /* size of common isoc out buffer */
181 #define BAS_OUTBUFPAD BAS_MAXFRAME /* size of pad area for isoc out buf */
184 #define BAS_OUTURBS 3
186 /* variable commands in struct bc_state */
198 /* variables in struct at_state_t */
212 #define EV_TIMEOUT -105
213 #define EV_IF_VER -106
214 #define EV_PROC_CIDMODE -107
215 #define EV_SHUTDOWN -108
216 #define EV_START -110
218 #define EV_IF_LOCK -112
219 #define EV_ACCEPT -114
222 #define EV_BC_OPEN -117
223 #define EV_BC_CLOSED -118
226 #define INS_command 0x0001 /* receiving messages (not payload data) */
227 #define INS_DLE_char 0x0002 /* DLE flag received (in DLE mode) */
228 #define INS_byte_stuff 0x0004
229 #define INS_have_data 0x0008
230 #define INS_DLE_command 0x0020 /* DLE message start (<DLE> X) received */
231 #define INS_flag_hunt 0x0040
234 #define CHS_D_UP 0x01
235 #define CHS_B_UP 0x02
236 #define CHS_NOTIFY_LL 0x04
238 #define ICALL_REJECT 0
239 #define ICALL_ACCEPT 1
240 #define ICALL_IGNORE 2
243 #define MS_UNINITIALIZED 0
246 #define MS_SHUTDOWN 3
258 #define SM_ISDN 1 /* default */
260 /* layer 2 protocols (AT^SBPR=...) */
266 struct gigaset_driver;
268 struct usb_cardstate;
269 struct ser_cardstate;
270 struct bas_cardstate;
278 int resp_code; /* RSP_XXXX */
279 int min_ConState; /* <0 => ignore */
280 int max_ConState; /* <0 => ignore */
281 int parameter; /* e.g. ZSAU_XXXX <0: ignore*/
282 int new_ConState; /* <0 => ignore */
283 int timeout; /* >0 => *HZ; <=0 => TOUT_XXXX*/
284 int action[MAXACT]; /* ACT_XXXX */
285 char *command; /* NULL==none */
288 extern struct reply_t gigaset_tab_cid[];
289 extern struct reply_t gigaset_tab_nocid[];
292 struct cardstate *cs;
295 unsigned char data[RBUFSIZE];
298 /* isochronous write buffer structure
299 * circular buffer with pad area for extraction of complete USB frames
300 * - data[read..nextread-1] is valid data already submitted to the USB subsystem
301 * - data[nextread..write-1] is valid data yet to be sent
302 * - data[write] is the next byte to write to
303 * - in byte-oriented L2 procotols, it is completely free
304 * - in bit-oriented L2 procotols, it may contain a partial byte of valid data
305 * - data[write+1..read-1] is free
306 * - wbits is the number of valid data bits in data[write], starting at the LSB
307 * - writesem is the semaphore for writing to the buffer:
308 * if writesem <= 0, data[write..read-1] is currently being written to
309 * - idle contains the byte value to repeat when the end of valid data is
310 * reached; if nextread==write (buffer contains no data to send), either the
311 * BAS_OUTBUFPAD bytes immediately before data[write] (if
312 * write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
313 * are also filled with that value
321 unsigned char data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
325 /* isochronous write URB context structure
326 * data to be stored along with the URB and retrieved when it is returned
327 * as completed by the USB subsystem
328 * - urb: pointer to the URB itself
329 * - bcs: pointer to the B Channel control structure
330 * - limit: end of write buffer area covered by this URB
331 * - status: URB completion status
333 struct isow_urbctx_t {
335 struct bc_state *bcs;
340 /* AT state structure
341 * data associated with the state of an ISDN connection, whether or not
342 * it is currently assigned a B channel
345 struct list_head list;
348 unsigned timer_index;
349 unsigned long timer_expires;
351 unsigned int ConState; /* State of connection */
352 struct reply_t *replystruct;
354 int int_var[VAR_NUM]; /* see VAR_XXXX */
355 char *str_var[STR_NUM]; /* see STR_XXXX */
356 unsigned pending_commands; /* see PC_XXXX */
359 struct cardstate *cs;
360 struct bc_state *bcs;
368 struct at_state_t *at_state;
371 /* This buffer holds all information about the used B-Channel */
373 struct sk_buff *tx_skb; /* Current transfer buffer to modem */
374 struct sk_buff_head squeue; /* B-Channel send Queue */
376 /* Variables for debugging .. */
377 int corrupted; /* Counter for corrupted packages */
378 int trans_down; /* Counter of packages (downstream) */
379 int trans_up; /* Counter of packages (upstream) */
381 struct at_state_t at_state;
385 int inputstate; /* see INS_XXXX */
389 struct cardstate *cs;
391 unsigned chstate; /* bitmap (CHS_*) */
393 unsigned proto2; /* layer 2 protocol (L2_*) */
394 char *commands[AT_NUM]; /* see AT_XXXX */
396 #ifdef CONFIG_GIGASET_DEBUG
402 /* private data of hardware drivers */
404 struct ser_bc_state *ser; /* serial hardware driver */
405 struct usb_bc_state *usb; /* usb hardware driver (m105) */
406 struct bas_bc_state *bas; /* usb hardware driver (base) */
409 void *ap; /* LL application structure */
413 struct gigaset_driver *driver;
414 unsigned minor_index;
416 struct device *tty_dev;
419 const struct gigaset_ops *ops;
421 /* Stuff to handle communication */
422 wait_queue_head_t waitqueue;
424 int mode; /* see M_XXXX */
425 int mstate; /* Modem state: see MS_XXXX */
426 /* only changed by the event layer */
430 struct bc_state *bcs; /* Array of struct bc_state */
432 int onechannel; /* data and commands transmitted in one
436 struct at_state_t at_state; /* at_state_t for cid == 0 */
437 struct list_head temp_at_states;/* list of temporary "struct
438 at_state_t"s without B channel */
440 struct inbuf_t *inbuf;
442 struct cmdbuf_t *cmdbuf, *lastcmdbuf;
444 unsigned curlen, cmdbytes;
447 struct tty_struct *tty;
448 struct tasklet_struct if_wake_tasklet;
449 unsigned control_state;
454 unsigned running; /* !=0 if events are handled */
455 unsigned connected; /* !=0 if hardware is connected */
456 unsigned isdn_up; /* !=0 after gigaset_isdn_start() */
460 int myid; /* id for communication with LL */
461 void *iif; /* LL interface structure */
462 unsigned short hw_hdr_len; /* headroom needed in data skbs */
464 struct reply_t *tabnocid;
465 struct reply_t *tabcid;
467 int ignoreframes; /* frames to ignore after setting up the
469 struct mutex mutex; /* locks this structure:
470 * connected is not changed,
471 * hardware_up is not changed,
472 * MState is not changed to or from
475 struct timer_list timer;
477 int dle; /* !=0 if DLE mode is active
478 (ZDLE=1 received -- M10x only) */
479 int cur_at_seq; /* sequence of AT commands being
481 int curchannel; /* channel those commands are meant
483 int commands_pending; /* flag(s) in xxx.commands_pending have
485 struct tasklet_struct event_tasklet;
486 /* tasklet for serializing AT commands.
488 * -> for modem reponses (and
489 * incoming data for M10x)
491 * -> after setting bits in
492 * xxx.at_state.pending_command
493 * (e.g. command from LL) */
494 struct tasklet_struct write_tasklet;
495 /* tasklet for serial output
496 * (not used in base driver) */
499 struct event_t events[MAX_EVENTS];
500 unsigned ev_tail, ev_head;
503 /* current modem response */
504 unsigned char respdata[MAX_RESP_SIZE+1];
507 /* private data of hardware drivers */
509 struct usb_cardstate *usb; /* USB hardware driver (m105) */
510 struct ser_cardstate *ser; /* serial hardware driver */
511 struct bas_cardstate *bas; /* USB hardware driver (base) */
515 struct gigaset_driver {
516 struct list_head list;
517 spinlock_t lock; /* locks minor tables and blocked */
518 struct tty_driver *tty;
522 struct cardstate *cs;
525 const struct gigaset_ops *ops;
526 struct module *owner;
530 struct cmdbuf_t *next, *prev;
532 struct tasklet_struct *wake_tasklet;
533 unsigned char buf[0];
536 struct bas_bc_state {
537 /* isochronous output state */
540 spinlock_t isooutlock;
541 struct isow_urbctx_t isoouturbs[BAS_OUTURBS];
542 struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl;
543 struct isowbuf_t *isooutbuf;
544 unsigned numsub; /* submitted URB counter
545 (for diagnostic messages only) */
546 struct tasklet_struct sent_tasklet;
548 /* isochronous input state */
549 spinlock_t isoinlock;
550 struct urb *isoinurbs[BAS_INURBS];
551 unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
552 struct urb *isoindone; /* completed isoc read URB */
553 int isoinstatus; /* status of completed URB */
554 int loststatus; /* status of dropped URB */
555 unsigned isoinlost; /* number of bytes lost */
556 /* state of bit unstuffing algorithm
557 (in addition to BC_state.inputstate) */
558 unsigned seqlen; /* number of '1' bits not yet
560 unsigned inbyte, inbits; /* collected bits for next byte */
562 unsigned goodbytes; /* bytes correctly received */
563 unsigned alignerrs; /* frames with incomplete byte at end */
564 unsigned fcserrs; /* FCS errors */
565 unsigned frameerrs; /* framing errors */
566 unsigned giants; /* long frames */
567 unsigned runts; /* short frames */
568 unsigned aborts; /* HDLC aborts */
569 unsigned shared0s; /* '0' bits shared between flags */
570 unsigned stolen0s; /* '0' stuff bits also serving as
572 struct tasklet_struct rcvd_tasklet;
576 /* Called from ev-layer.c/interface.c for sending AT commands to the
578 int (*write_cmd)(struct cardstate *cs,
579 const unsigned char *buf, int len,
580 struct tasklet_struct *wake_tasklet);
582 /* Called from interface.c for additional device control */
583 int (*write_room)(struct cardstate *cs);
584 int (*chars_in_buffer)(struct cardstate *cs);
585 int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
587 /* Called from ev-layer.c after setting up connection
588 * Should call gigaset_bchannel_up(), when finished. */
589 int (*init_bchannel)(struct bc_state *bcs);
591 /* Called from ev-layer.c after hanging up
592 * Should call gigaset_bchannel_down(), when finished. */
593 int (*close_bchannel)(struct bc_state *bcs);
595 /* Called by gigaset_initcs() for setting up bcs->hw.xxx */
596 int (*initbcshw)(struct bc_state *bcs);
598 /* Called by gigaset_freecs() for freeing bcs->hw.xxx */
599 int (*freebcshw)(struct bc_state *bcs);
601 /* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
602 void (*reinitbcshw)(struct bc_state *bcs);
604 /* Called by gigaset_initcs() for setting up cs->hw.xxx */
605 int (*initcshw)(struct cardstate *cs);
607 /* Called by gigaset_freecs() for freeing cs->hw.xxx */
608 void (*freecshw)(struct cardstate *cs);
610 /* Called from common.c/interface.c for additional serial port
612 int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
614 int (*baud_rate)(struct cardstate *cs, unsigned cflag);
615 int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
617 /* Called from LL interface to put an skb into the send-queue.
618 * After sending is completed, gigaset_skb_sent() must be called
619 * with the skb's link layer header preserved. */
620 int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
622 /* Called from ev-layer.c to process a block of data
623 * received through the common/control channel. */
624 void (*handle_input)(struct inbuf_t *inbuf);
628 /* = Common structures and definitions =======================================
631 /* Parser states for DLE-Event:
632 * <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
634 * <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+
636 #define DLE_FLAG 0x10
638 /* ===========================================================================
639 * Functions implemented in asyncdata.c
642 /* Called from LL interface to put an skb into the send queue. */
643 int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
645 /* Called from ev-layer.c to process a block of data
646 * received through the common/control channel. */
647 void gigaset_m10x_input(struct inbuf_t *inbuf);
649 /* ===========================================================================
650 * Functions implemented in isocdata.c
653 /* Called from LL interface to put an skb into the send queue. */
654 int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
656 /* Called from ev-layer.c to process a block of data
657 * received through the common/control channel. */
658 void gigaset_isoc_input(struct inbuf_t *inbuf);
660 /* Called from bas-gigaset.c to process a block of data
661 * received through the isochronous channel */
662 void gigaset_isoc_receive(unsigned char *src, unsigned count,
663 struct bc_state *bcs);
665 /* Called from bas-gigaset.c to put a block of data
666 * into the isochronous output buffer */
667 int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
669 /* Called from bas-gigaset.c to initialize the isochronous output buffer */
670 void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
672 /* Called from bas-gigaset.c to retrieve a block of bytes for sending */
673 int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
675 /* ===========================================================================
676 * Functions implemented in LL interface
679 /* Called from common.c for setting up/shutting down with the ISDN subsystem */
680 void gigaset_isdn_regdrv(void);
681 void gigaset_isdn_unregdrv(void);
682 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid);
683 void gigaset_isdn_unregdev(struct cardstate *cs);
685 /* Called from hardware module to indicate completion of an skb */
686 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
687 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb);
688 void gigaset_isdn_rcv_err(struct bc_state *bcs);
690 /* Called from common.c/ev-layer.c to indicate events relevant to the LL */
691 void gigaset_isdn_start(struct cardstate *cs);
692 void gigaset_isdn_stop(struct cardstate *cs);
693 int gigaset_isdn_icall(struct at_state_t *at_state);
694 void gigaset_isdn_connD(struct bc_state *bcs);
695 void gigaset_isdn_hupD(struct bc_state *bcs);
696 void gigaset_isdn_connB(struct bc_state *bcs);
697 void gigaset_isdn_hupB(struct bc_state *bcs);
699 /* ===========================================================================
700 * Functions implemented in ev-layer.c
703 /* tasklet called from common.c to process queued events */
704 void gigaset_handle_event(unsigned long data);
706 /* called from isocdata.c / asyncdata.c
707 * when a complete modem response line has been received */
708 void gigaset_handle_modem_response(struct cardstate *cs);
710 /* ===========================================================================
711 * Functions implemented in proc.c
714 /* initialize sysfs for device */
715 void gigaset_init_dev_sysfs(struct cardstate *cs);
716 void gigaset_free_dev_sysfs(struct cardstate *cs);
718 /* ===========================================================================
719 * Functions implemented in common.c/gigaset.h
722 void gigaset_bcs_reinit(struct bc_state *bcs);
723 void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
724 struct cardstate *cs, int cid);
725 int gigaset_get_channel(struct bc_state *bcs);
726 struct bc_state *gigaset_get_free_channel(struct cardstate *cs);
727 void gigaset_free_channel(struct bc_state *bcs);
728 int gigaset_get_channels(struct cardstate *cs);
729 void gigaset_free_channels(struct cardstate *cs);
730 void gigaset_block_channels(struct cardstate *cs);
732 /* Allocate and initialize driver structure. */
733 struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
734 const char *procname,
736 const struct gigaset_ops *ops,
737 struct module *owner);
739 /* Deallocate driver structure. */
740 void gigaset_freedriver(struct gigaset_driver *drv);
741 void gigaset_debugdrivers(void);
742 struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
743 struct cardstate *gigaset_get_cs_by_id(int id);
744 void gigaset_blockdriver(struct gigaset_driver *drv);
746 /* Allocate and initialize card state. Calls hardware dependent
747 gigaset_init[b]cs(). */
748 struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
749 int onechannel, int ignoreframes,
750 int cidmode, const char *modulename);
752 /* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
753 void gigaset_freecs(struct cardstate *cs);
755 /* Tell common.c that hardware and driver are ready. */
756 int gigaset_start(struct cardstate *cs);
758 /* Tell common.c that the device is not present any more. */
759 void gigaset_stop(struct cardstate *cs);
761 /* Tell common.c that the driver is being unloaded. */
762 int gigaset_shutdown(struct cardstate *cs);
764 /* Tell common.c that an skb has been sent. */
765 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
767 /* Append event to the queue.
768 * Returns NULL on failure or a pointer to the event on success.
769 * ptr must be kmalloc()ed (and not be freed by the caller).
771 struct event_t *gigaset_add_event(struct cardstate *cs,
772 struct at_state_t *at_state, int type,
773 void *ptr, int parameter, void *arg);
775 /* Called on CONFIG1 command from frontend. */
776 int gigaset_enterconfigmode(struct cardstate *cs);
778 /* cs->lock must not be locked */
779 static inline void gigaset_schedule_event(struct cardstate *cs)
782 spin_lock_irqsave(&cs->lock, flags);
784 tasklet_schedule(&cs->event_tasklet);
785 spin_unlock_irqrestore(&cs->lock, flags);
788 /* Tell common.c that B channel has been closed. */
789 /* cs->lock must not be locked */
790 static inline void gigaset_bchannel_down(struct bc_state *bcs)
792 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
793 gigaset_schedule_event(bcs->cs);
796 /* Tell common.c that B channel has been opened. */
797 /* cs->lock must not be locked */
798 static inline void gigaset_bchannel_up(struct bc_state *bcs)
800 gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
801 gigaset_schedule_event(bcs->cs);
804 /* handling routines for sk_buff */
805 /* ============================= */
807 /* append received bytes to inbuf */
808 int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
811 /* ===========================================================================
812 * Functions implemented in interface.c
815 /* initialize interface */
816 void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
817 const char *devname);
818 /* release interface */
819 void gigaset_if_freedriver(struct gigaset_driver *drv);
821 void gigaset_if_init(struct cardstate *cs);
823 void gigaset_if_free(struct cardstate *cs);
824 /* device received data */
825 void gigaset_if_receive(struct cardstate *cs,
826 unsigned char *buffer, size_t len);