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linux/drivers/isdn/gigaset/gigaset.h
Tilman Schmidt e468c04894 Gigaset: permit module unload 
Fix the initialization and reference counting of the Gigaset driver modules
so that they can be unloaded when they are not actually in use.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Cc: Hansjoerg Lipp <hjlipp@web.de>
Cc: Greg KH <gregkh@suse.de>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:12 -08:00

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/*
* Siemens Gigaset 307x driver
* Common header file for all connection variants
*
* Written by Stefan Eilers
* and Hansjoerg Lipp <hjlipp@web.de>
*
* =====================================================================
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* =====================================================================
*/
#ifndef GIGASET_H
#define GIGASET_H
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/isdnif.h>
#include <linux/usb.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ppp_defs.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/list.h>
#include <asm/atomic.h>
#define GIG_VERSION {0,5,0,0}
#define GIG_COMPAT {0,4,0,0}
#define MAX_REC_PARAMS 10 /* Max. number of params in response string */
#define MAX_RESP_SIZE 512 /* Max. size of a response string */
#define HW_HDR_LEN 2 /* Header size used to store ack info */
#define MAX_EVENTS 64 /* size of event queue */
#define RBUFSIZE 8192
#define SBUFSIZE 4096 /* sk_buff payload size */
#define TRANSBUFSIZE 768 /* bytes per skb for transparent receive */
#define MAX_BUF_SIZE (SBUFSIZE - 2) /* Max. size of a data packet from LL */
/* compile time options */
#define GIG_MAJOR 0
#define GIG_MAYINITONDIAL
#define GIG_RETRYCID
#define GIG_X75
#define GIG_TICK 100 /* in milliseconds */
/* timeout values (unit: 1 sec) */
#define INIT_TIMEOUT 1
/* timeout values (unit: 0.1 sec) */
#define RING_TIMEOUT 3 /* for additional parameters to RING */
#define BAS_TIMEOUT 20 /* for response to Base USB ops */
#define ATRDY_TIMEOUT 3 /* for HD_READY_SEND_ATDATA */
#define BAS_RETRY 3 /* max. retries for base USB ops */
#define MAXACT 3
extern int gigaset_debuglevel; /* "needs" cast to (enum debuglevel) */
/* debug flags, combine by adding/bitwise OR */
enum debuglevel {
DEBUG_INTR = 0x00008, /* interrupt processing */
DEBUG_CMD = 0x00020, /* sent/received LL commands */
DEBUG_STREAM = 0x00040, /* application data stream I/O events */
DEBUG_STREAM_DUMP = 0x00080, /* application data stream content */
DEBUG_LLDATA = 0x00100, /* sent/received LL data */
DEBUG_DRIVER = 0x00400, /* driver structure */
DEBUG_HDLC = 0x00800, /* M10x HDLC processing */
DEBUG_WRITE = 0x01000, /* M105 data write */
DEBUG_TRANSCMD = 0x02000, /* AT-COMMANDS+RESPONSES */
DEBUG_MCMD = 0x04000, /* COMMANDS THAT ARE SENT VERY OFTEN */
DEBUG_INIT = 0x08000, /* (de)allocation+initialization of data
structures */
DEBUG_SUSPEND = 0x10000, /* suspend/resume processing */
DEBUG_OUTPUT = 0x20000, /* output to device */
DEBUG_ISO = 0x40000, /* isochronous transfers */
DEBUG_IF = 0x80000, /* character device operations */
DEBUG_USBREQ = 0x100000, /* USB communication (except payload
data) */
DEBUG_LOCKCMD = 0x200000, /* AT commands and responses when
MS_LOCKED */
DEBUG_ANY = 0x3fffff, /* print message if any of the others is
activated */
};
/* Kernel message macros for situations where dev_printk and friends cannot be
* used for lack of reliable access to a device structure.
* linux/usb.h already contains these but in an obsolete form which clutters
* the log needlessly, and according to the USB maintainer those should be
* removed rather than fixed anyway.
*/
#undef err
#undef info
#undef warn
#undef notice
#define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
format "\n" , ## arg)
#define info(format, arg...) printk(KERN_INFO KBUILD_MODNAME ": " \
format "\n" , ## arg)
#define warn(format, arg...) printk(KERN_WARNING KBUILD_MODNAME ": " \
format "\n" , ## arg)
#define notice(format, arg...) printk(KERN_NOTICE KBUILD_MODNAME ": " \
format "\n" , ## arg)
#ifdef CONFIG_GIGASET_DEBUG
#define gig_dbg(level, format, arg...) \
do { \
if (unlikely(((enum debuglevel)gigaset_debuglevel) & (level))) \
printk(KERN_DEBUG KBUILD_MODNAME ": " format "\n", \
## arg); \
} while (0)
#define DEBUG_DEFAULT (DEBUG_TRANSCMD | DEBUG_CMD | DEBUG_USBREQ)
#else
#define gig_dbg(level, format, arg...) do {} while (0)
#define DEBUG_DEFAULT 0
#endif
void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
size_t len, const unsigned char *buf);
/* connection state */
#define ZSAU_NONE 0
#define ZSAU_DISCONNECT_IND 4
#define ZSAU_OUTGOING_CALL_PROCEEDING 1
#define ZSAU_PROCEEDING 1
#define ZSAU_CALL_DELIVERED 2
#define ZSAU_ACTIVE 3
#define ZSAU_NULL 5
#define ZSAU_DISCONNECT_REQ 6
#define ZSAU_UNKNOWN -1
/* USB control transfer requests */
#define OUT_VENDOR_REQ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
#define IN_VENDOR_REQ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT)
/* int-in-events 3070 */
#define HD_B1_FLOW_CONTROL 0x80
#define HD_B2_FLOW_CONTROL 0x81
#define HD_RECEIVEATDATA_ACK (0x35) // 3070
// att: HD_RECEIVE>>AT<<DATA_ACK
#define HD_READY_SEND_ATDATA (0x36) // 3070
#define HD_OPEN_ATCHANNEL_ACK (0x37) // 3070
#define HD_CLOSE_ATCHANNEL_ACK (0x38) // 3070
#define HD_DEVICE_INIT_OK (0x11) // ISurf USB + 3070
#define HD_OPEN_B1CHANNEL_ACK (0x51) // ISurf USB + 3070
#define HD_OPEN_B2CHANNEL_ACK (0x52) // ISurf USB + 3070
#define HD_CLOSE_B1CHANNEL_ACK (0x53) // ISurf USB + 3070
#define HD_CLOSE_B2CHANNEL_ACK (0x54) // ISurf USB + 3070
// Powermangment
#define HD_SUSPEND_END (0x61) // ISurf USB
// Configuration
#define HD_RESET_INTERRUPT_PIPE_ACK (0xFF) // ISurf USB + 3070
/* control requests 3070 */
#define HD_OPEN_B1CHANNEL (0x23) // ISurf USB + 3070
#define HD_CLOSE_B1CHANNEL (0x24) // ISurf USB + 3070
#define HD_OPEN_B2CHANNEL (0x25) // ISurf USB + 3070
#define HD_CLOSE_B2CHANNEL (0x26) // ISurf USB + 3070
#define HD_RESET_INTERRUPT_PIPE (0x27) // ISurf USB + 3070
#define HD_DEVICE_INIT_ACK (0x34) // ISurf USB + 3070
#define HD_WRITE_ATMESSAGE (0x12) // 3070
#define HD_READ_ATMESSAGE (0x13) // 3070
#define HD_OPEN_ATCHANNEL (0x28) // 3070
#define HD_CLOSE_ATCHANNEL (0x29) // 3070
/* number of B channels supported by base driver */
#define BAS_CHANNELS 2
/* USB frames for isochronous transfer */
#define BAS_FRAMETIME 1 /* number of milliseconds between frames */
#define BAS_NUMFRAMES 8 /* number of frames per URB */
#define BAS_MAXFRAME 16 /* allocated bytes per frame */
#define BAS_NORMFRAME 8 /* send size without flow control */
#define BAS_HIGHFRAME 10 /* " " with positive flow control */
#define BAS_LOWFRAME 5 /* " " with negative flow control */
#define BAS_CORRFRAMES 4 /* flow control multiplicator */
#define BAS_INBUFSIZE (BAS_MAXFRAME * BAS_NUMFRAMES)
/* size of isoc in buf per URB */
#define BAS_OUTBUFSIZE 4096 /* size of common isoc out buffer */
#define BAS_OUTBUFPAD BAS_MAXFRAME /* size of pad area for isoc out buf */
#define BAS_INURBS 3
#define BAS_OUTURBS 3
/* variable commands in struct bc_state */
#define AT_ISO 0
#define AT_DIAL 1
#define AT_MSN 2
#define AT_BC 3
#define AT_PROTO 4
#define AT_TYPE 5
#define AT_HLC 6
#define AT_NUM 7
/* variables in struct at_state_t */
#define VAR_ZSAU 0
#define VAR_ZDLE 1
#define VAR_ZVLS 2
#define VAR_ZCTP 3
#define VAR_NUM 4
#define STR_NMBR 0
#define STR_ZCPN 1
#define STR_ZCON 2
#define STR_ZBC 3
#define STR_ZHLC 4
#define STR_NUM 5
#define EV_TIMEOUT -105
#define EV_IF_VER -106
#define EV_PROC_CIDMODE -107
#define EV_SHUTDOWN -108
#define EV_START -110
#define EV_STOP -111
#define EV_IF_LOCK -112
#define EV_PROTO_L2 -113
#define EV_ACCEPT -114
#define EV_DIAL -115
#define EV_HUP -116
#define EV_BC_OPEN -117
#define EV_BC_CLOSED -118
/* input state */
#define INS_command 0x0001
#define INS_DLE_char 0x0002
#define INS_byte_stuff 0x0004
#define INS_have_data 0x0008
#define INS_skip_frame 0x0010
#define INS_DLE_command 0x0020
#define INS_flag_hunt 0x0040
/* channel state */
#define CHS_D_UP 0x01
#define CHS_B_UP 0x02
#define CHS_NOTIFY_LL 0x04
#define ICALL_REJECT 0
#define ICALL_ACCEPT 1
#define ICALL_IGNORE 2
/* device state */
#define MS_UNINITIALIZED 0
#define MS_INIT 1
#define MS_LOCKED 2
#define MS_SHUTDOWN 3
#define MS_RECOVER 4
#define MS_READY 5
/* mode */
#define M_UNKNOWN 0
#define M_CONFIG 1
#define M_UNIMODEM 2
#define M_CID 3
/* start mode */
#define SM_LOCKED 0
#define SM_ISDN 1 /* default */
struct gigaset_ops;
struct gigaset_driver;
struct usb_cardstate;
struct ser_cardstate;
struct bas_cardstate;
struct bc_state;
struct usb_bc_state;
struct ser_bc_state;
struct bas_bc_state;
struct reply_t {
int resp_code; /* RSP_XXXX */
int min_ConState; /* <0 => ignore */
int max_ConState; /* <0 => ignore */
int parameter; /* e.g. ZSAU_XXXX <0: ignore*/
int new_ConState; /* <0 => ignore */
int timeout; /* >0 => *HZ; <=0 => TOUT_XXXX*/
int action[MAXACT]; /* ACT_XXXX */
char *command; /* NULL==none */
};
extern struct reply_t gigaset_tab_cid_m10x[];
extern struct reply_t gigaset_tab_nocid_m10x[];
struct inbuf_t {
unsigned char *rcvbuf; /* usb-gigaset receive buffer */
struct bc_state *bcs;
struct cardstate *cs;
int inputstate;
int head, tail;
unsigned char data[RBUFSIZE];
};
/* isochronous write buffer structure
* circular buffer with pad area for extraction of complete USB frames
* - data[read..nextread-1] is valid data already submitted to the USB subsystem
* - data[nextread..write-1] is valid data yet to be sent
* - data[write] is the next byte to write to
* - in byte-oriented L2 procotols, it is completely free
* - in bit-oriented L2 procotols, it may contain a partial byte of valid data
* - data[write+1..read-1] is free
* - wbits is the number of valid data bits in data[write], starting at the LSB
* - writesem is the semaphore for writing to the buffer:
* if writesem <= 0, data[write..read-1] is currently being written to
* - idle contains the byte value to repeat when the end of valid data is
* reached; if nextread==write (buffer contains no data to send), either the
* BAS_OUTBUFPAD bytes immediately before data[write] (if
* write>=BAS_OUTBUFPAD) or those of the pad area (if write<BAS_OUTBUFPAD)
* are also filled with that value
*/
struct isowbuf_t {
int read;
int nextread;
int write;
atomic_t writesem;
int wbits;
unsigned char data[BAS_OUTBUFSIZE + BAS_OUTBUFPAD];
unsigned char idle;
};
/* isochronous write URB context structure
* data to be stored along with the URB and retrieved when it is returned
* as completed by the USB subsystem
* - urb: pointer to the URB itself
* - bcs: pointer to the B Channel control structure
* - limit: end of write buffer area covered by this URB
* - status: URB completion status
*/
struct isow_urbctx_t {
struct urb *urb;
struct bc_state *bcs;
int limit;
int status;
};
/* AT state structure
* data associated with the state of an ISDN connection, whether or not
* it is currently assigned a B channel
*/
struct at_state_t {
struct list_head list;
int waiting;
int getstring;
unsigned timer_index;
unsigned long timer_expires;
int timer_active;
unsigned int ConState; /* State of connection */
struct reply_t *replystruct;
int cid;
int int_var[VAR_NUM]; /* see VAR_XXXX */
char *str_var[STR_NUM]; /* see STR_XXXX */
unsigned pending_commands; /* see PC_XXXX */
unsigned seq_index;
struct cardstate *cs;
struct bc_state *bcs;
};
struct resp_type_t {
unsigned char *response;
int resp_code; /* RSP_XXXX */
int type; /* RT_XXXX */
};
struct event_t {
int type;
void *ptr, *arg;
int parameter;
int cid;
struct at_state_t *at_state;
};
/* This buffer holds all information about the used B-Channel */
struct bc_state {
struct sk_buff *tx_skb; /* Current transfer buffer to modem */
struct sk_buff_head squeue; /* B-Channel send Queue */
/* Variables for debugging .. */
int corrupted; /* Counter for corrupted packages */
int trans_down; /* Counter of packages (downstream) */
int trans_up; /* Counter of packages (upstream) */
struct at_state_t at_state;
unsigned long rcvbytes;
__u16 fcs;
struct sk_buff *skb;
int inputstate; /* see INS_XXXX */
int channel;
struct cardstate *cs;
unsigned chstate; /* bitmap (CHS_*) */
int ignore;
unsigned proto2; /* Layer 2 protocol (ISDN_PROTO_L2_*) */
char *commands[AT_NUM]; /* see AT_XXXX */
#ifdef CONFIG_GIGASET_DEBUG
int emptycount;
#endif
int busy;
int use_count;
/* private data of hardware drivers */
union {
struct ser_bc_state *ser; /* serial hardware driver */
struct usb_bc_state *usb; /* usb hardware driver (m105) */
struct bas_bc_state *bas; /* usb hardware driver (base) */
} hw;
};
struct cardstate {
struct gigaset_driver *driver;
unsigned minor_index;
struct device *dev;
struct device *tty_dev;
unsigned flags;
const struct gigaset_ops *ops;
/* Stuff to handle communication */
wait_queue_head_t waitqueue;
int waiting;
int mode; /* see M_XXXX */
int mstate; /* Modem state: see MS_XXXX */
/* only changed by the event layer */
int cmd_result;
int channels;
struct bc_state *bcs; /* Array of struct bc_state */
int onechannel; /* data and commands transmitted in one
stream (M10x) */
spinlock_t lock;
struct at_state_t at_state; /* at_state_t for cid == 0 */
struct list_head temp_at_states;/* list of temporary "struct
at_state_t"s without B channel */
struct inbuf_t *inbuf;
struct cmdbuf_t *cmdbuf, *lastcmdbuf;
spinlock_t cmdlock;
unsigned curlen, cmdbytes;
unsigned open_count;
struct tty_struct *tty;
struct tasklet_struct if_wake_tasklet;
unsigned control_state;
unsigned fwver[4];
int gotfwver;
unsigned running; /* !=0 if events are handled */
unsigned connected; /* !=0 if hardware is connected */
unsigned isdn_up; /* !=0 after ISDN_STAT_RUN */
unsigned cidmode;
int myid; /* id for communication with LL */
isdn_if iif;
struct reply_t *tabnocid;
struct reply_t *tabcid;
int cs_init;
int ignoreframes; /* frames to ignore after setting up the
B channel */
struct mutex mutex; /* locks this structure:
* connected is not changed,
* hardware_up is not changed,
* MState is not changed to or from
* MS_LOCKED */
struct timer_list timer;
int retry_count;
int dle; /* !=0 if modem commands/responses are
dle encoded */
int cur_at_seq; /* sequence of AT commands being
processed */
int curchannel; /* channel those commands are meant
for */
int commands_pending; /* flag(s) in xxx.commands_pending have
been set */
struct tasklet_struct event_tasklet;
/* tasklet for serializing AT commands.
* Scheduled
* -> for modem reponses (and
* incoming data for M10x)
* -> on timeout
* -> after setting bits in
* xxx.at_state.pending_command
* (e.g. command from LL) */
struct tasklet_struct write_tasklet;
/* tasklet for serial output
* (not used in base driver) */
/* event queue */
struct event_t events[MAX_EVENTS];
unsigned ev_tail, ev_head;
spinlock_t ev_lock;
/* current modem response */
unsigned char respdata[MAX_RESP_SIZE];
unsigned cbytes;
/* private data of hardware drivers */
union {
struct usb_cardstate *usb; /* USB hardware driver (m105) */
struct ser_cardstate *ser; /* serial hardware driver */
struct bas_cardstate *bas; /* USB hardware driver (base) */
} hw;
};
struct gigaset_driver {
struct list_head list;
spinlock_t lock; /* locks minor tables and blocked */
struct tty_driver *tty;
unsigned have_tty;
unsigned minor;
unsigned minors;
struct cardstate *cs;
int blocked;
const struct gigaset_ops *ops;
struct module *owner;
};
struct cmdbuf_t {
struct cmdbuf_t *next, *prev;
int len, offset;
struct tasklet_struct *wake_tasklet;
unsigned char buf[0];
};
struct bas_bc_state {
/* isochronous output state */
int running;
atomic_t corrbytes;
spinlock_t isooutlock;
struct isow_urbctx_t isoouturbs[BAS_OUTURBS];
struct isow_urbctx_t *isooutdone, *isooutfree, *isooutovfl;
struct isowbuf_t *isooutbuf;
unsigned numsub; /* submitted URB counter
(for diagnostic messages only) */
struct tasklet_struct sent_tasklet;
/* isochronous input state */
spinlock_t isoinlock;
struct urb *isoinurbs[BAS_INURBS];
unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
struct urb *isoindone; /* completed isoc read URB */
int isoinstatus; /* status of completed URB */
int loststatus; /* status of dropped URB */
unsigned isoinlost; /* number of bytes lost */
/* state of bit unstuffing algorithm
(in addition to BC_state.inputstate) */
unsigned seqlen; /* number of '1' bits not yet
unstuffed */
unsigned inbyte, inbits; /* collected bits for next byte */
/* statistics */
unsigned goodbytes; /* bytes correctly received */
unsigned alignerrs; /* frames with incomplete byte at end */
unsigned fcserrs; /* FCS errors */
unsigned frameerrs; /* framing errors */
unsigned giants; /* long frames */
unsigned runts; /* short frames */
unsigned aborts; /* HDLC aborts */
unsigned shared0s; /* '0' bits shared between flags */
unsigned stolen0s; /* '0' stuff bits also serving as
leading flag bits */
struct tasklet_struct rcvd_tasklet;
};
struct gigaset_ops {
/* Called from ev-layer.c/interface.c for sending AT commands to the
device */
int (*write_cmd)(struct cardstate *cs,
const unsigned char *buf, int len,
struct tasklet_struct *wake_tasklet);
/* Called from interface.c for additional device control */
int (*write_room)(struct cardstate *cs);
int (*chars_in_buffer)(struct cardstate *cs);
int (*brkchars)(struct cardstate *cs, const unsigned char buf[6]);
/* Called from ev-layer.c after setting up connection
* Should call gigaset_bchannel_up(), when finished. */
int (*init_bchannel)(struct bc_state *bcs);
/* Called from ev-layer.c after hanging up
* Should call gigaset_bchannel_down(), when finished. */
int (*close_bchannel)(struct bc_state *bcs);
/* Called by gigaset_initcs() for setting up bcs->hw.xxx */
int (*initbcshw)(struct bc_state *bcs);
/* Called by gigaset_freecs() for freeing bcs->hw.xxx */
int (*freebcshw)(struct bc_state *bcs);
/* Called by gigaset_bchannel_down() for resetting bcs->hw.xxx */
void (*reinitbcshw)(struct bc_state *bcs);
/* Called by gigaset_initcs() for setting up cs->hw.xxx */
int (*initcshw)(struct cardstate *cs);
/* Called by gigaset_freecs() for freeing cs->hw.xxx */
void (*freecshw)(struct cardstate *cs);
/* Called from common.c/interface.c for additional serial port
control */
int (*set_modem_ctrl)(struct cardstate *cs, unsigned old_state,
unsigned new_state);
int (*baud_rate)(struct cardstate *cs, unsigned cflag);
int (*set_line_ctrl)(struct cardstate *cs, unsigned cflag);
/* Called from i4l.c to put an skb into the send-queue. */
int (*send_skb)(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
* received through the common/control channel. */
void (*handle_input)(struct inbuf_t *inbuf);
};
/* = Common structures and definitions ======================================= */
/* Parser states for DLE-Event:
* <DLE-EVENT>: <DLE_FLAG> "X" <EVENT> <DLE_FLAG> "."
* <DLE_FLAG>: 0x10
* <EVENT>: ((a-z)* | (A-Z)* | (0-10)*)+
*/
#define DLE_FLAG 0x10
/* ===========================================================================
* Functions implemented in asyncdata.c
*/
/* Called from i4l.c to put an skb into the send-queue.
* After sending gigaset_skb_sent() should be called. */
int gigaset_m10x_send_skb(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
* received through the common/control channel. */
void gigaset_m10x_input(struct inbuf_t *inbuf);
/* ===========================================================================
* Functions implemented in isocdata.c
*/
/* Called from i4l.c to put an skb into the send-queue.
* After sending gigaset_skb_sent() should be called. */
int gigaset_isoc_send_skb(struct bc_state *bcs, struct sk_buff *skb);
/* Called from ev-layer.c to process a block of data
* received through the common/control channel. */
void gigaset_isoc_input(struct inbuf_t *inbuf);
/* Called from bas-gigaset.c to process a block of data
* received through the isochronous channel */
void gigaset_isoc_receive(unsigned char *src, unsigned count,
struct bc_state *bcs);
/* Called from bas-gigaset.c to put a block of data
* into the isochronous output buffer */
int gigaset_isoc_buildframe(struct bc_state *bcs, unsigned char *in, int len);
/* Called from bas-gigaset.c to initialize the isochronous output buffer */
void gigaset_isowbuf_init(struct isowbuf_t *iwb, unsigned char idle);
/* Called from bas-gigaset.c to retrieve a block of bytes for sending */
int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size);
/* ===========================================================================
* Functions implemented in i4l.c/gigaset.h
*/
/* Called by gigaset_initcs() for setting up with the isdn4linux subsystem */
int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid);
/* Called from xxx-gigaset.c to indicate completion of sending an skb */
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
/* Called from common.c/ev-layer.c to indicate events relevant to the LL */
int gigaset_isdn_icall(struct at_state_t *at_state);
int gigaset_isdn_setup_accept(struct at_state_t *at_state);
int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data);
void gigaset_i4l_cmd(struct cardstate *cs, int cmd);
void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd);
static inline void gigaset_isdn_rcv_err(struct bc_state *bcs)
{
isdn_ctrl response;
/* error -> LL */
gig_dbg(DEBUG_CMD, "sending L1ERR");
response.driver = bcs->cs->myid;
response.command = ISDN_STAT_L1ERR;
response.arg = bcs->channel;
response.parm.errcode = ISDN_STAT_L1ERR_RECV;
bcs->cs->iif.statcallb(&response);
}
/* ===========================================================================
* Functions implemented in ev-layer.c
*/
/* tasklet called from common.c to process queued events */
void gigaset_handle_event(unsigned long data);
/* called from isocdata.c / asyncdata.c
* when a complete modem response line has been received */
void gigaset_handle_modem_response(struct cardstate *cs);
/* ===========================================================================
* Functions implemented in proc.c
*/
/* initialize sysfs for device */
void gigaset_init_dev_sysfs(struct cardstate *cs);
void gigaset_free_dev_sysfs(struct cardstate *cs);
/* ===========================================================================
* Functions implemented in common.c/gigaset.h
*/
void gigaset_bcs_reinit(struct bc_state *bcs);
void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
struct cardstate *cs, int cid);
int gigaset_get_channel(struct bc_state *bcs);
void gigaset_free_channel(struct bc_state *bcs);
int gigaset_get_channels(struct cardstate *cs);
void gigaset_free_channels(struct cardstate *cs);
void gigaset_block_channels(struct cardstate *cs);
/* Allocate and initialize driver structure. */
struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
const char *procname,
const char *devname,
const struct gigaset_ops *ops,
struct module *owner);
/* Deallocate driver structure. */
void gigaset_freedriver(struct gigaset_driver *drv);
void gigaset_debugdrivers(void);
struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty);
struct cardstate *gigaset_get_cs_by_id(int id);
void gigaset_blockdriver(struct gigaset_driver *drv);
/* Allocate and initialize card state. Calls hardware dependent
gigaset_init[b]cs(). */
struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
int onechannel, int ignoreframes,
int cidmode, const char *modulename);
/* Free card state. Calls hardware dependent gigaset_free[b]cs(). */
void gigaset_freecs(struct cardstate *cs);
/* Tell common.c that hardware and driver are ready. */
int gigaset_start(struct cardstate *cs);
/* Tell common.c that the device is not present any more. */
void gigaset_stop(struct cardstate *cs);
/* Tell common.c that the driver is being unloaded. */
int gigaset_shutdown(struct cardstate *cs);
/* Tell common.c that an skb has been sent. */
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb);
/* Append event to the queue.
* Returns NULL on failure or a pointer to the event on success.
* ptr must be kmalloc()ed (and not be freed by the caller).
*/
struct event_t *gigaset_add_event(struct cardstate *cs,
struct at_state_t *at_state, int type,
void *ptr, int parameter, void *arg);
/* Called on CONFIG1 command from frontend. */
int gigaset_enterconfigmode(struct cardstate *cs); //0: success <0: errorcode
/* cs->lock must not be locked */
static inline void gigaset_schedule_event(struct cardstate *cs)
{
unsigned long flags;
spin_lock_irqsave(&cs->lock, flags);
if (cs->running)
tasklet_schedule(&cs->event_tasklet);
spin_unlock_irqrestore(&cs->lock, flags);
}
/* Tell common.c that B channel has been closed. */
/* cs->lock must not be locked */
static inline void gigaset_bchannel_down(struct bc_state *bcs)
{
gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_CLOSED, NULL, 0, NULL);
gig_dbg(DEBUG_CMD, "scheduling BC_CLOSED");
gigaset_schedule_event(bcs->cs);
}
/* Tell common.c that B channel has been opened. */
/* cs->lock must not be locked */
static inline void gigaset_bchannel_up(struct bc_state *bcs)
{
gigaset_add_event(bcs->cs, &bcs->at_state, EV_BC_OPEN, NULL, 0, NULL);
gig_dbg(DEBUG_CMD, "scheduling BC_OPEN");
gigaset_schedule_event(bcs->cs);
}
/* handling routines for sk_buff */
/* ============================= */
/* pass received skb to LL
* Warning: skb must not be accessed anymore!
*/
static inline void gigaset_rcv_skb(struct sk_buff *skb,
struct cardstate *cs,
struct bc_state *bcs)
{
cs->iif.rcvcallb_skb(cs->myid, bcs->channel, skb);
bcs->trans_down++;
}
/* handle reception of corrupted skb
* Warning: skb must not be accessed anymore!
*/
static inline void gigaset_rcv_error(struct sk_buff *procskb,
struct cardstate *cs,
struct bc_state *bcs)
{
if (procskb)
dev_kfree_skb(procskb);
if (bcs->ignore)
--bcs->ignore;
else {
++bcs->corrupted;
gigaset_isdn_rcv_err(bcs);
}
}
/* append received bytes to inbuf */
int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
unsigned numbytes);
/* ===========================================================================
* Functions implemented in interface.c
*/
/* initialize interface */
void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
const char *devname);
/* release interface */
void gigaset_if_freedriver(struct gigaset_driver *drv);
/* add minor */
void gigaset_if_init(struct cardstate *cs);
/* remove minor */
void gigaset_if_free(struct cardstate *cs);
/* device received data */
void gigaset_if_receive(struct cardstate *cs,
unsigned char *buffer, size_t len);
#endif
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