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    Subject[PATCH 2/7] isdn4linux: Siemens Gigaset drivers - event layer
    From: Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>

    This patch adds the event layer to the gigaset module. The event layer
    serializes events from hardware, userspace, and other kernel subsystems.

    Signed-off-by: Hansjoerg Lipp <hjlipp@web.de>
    Signed-off-by: Tilman Schmidt <tilman@imap.cc>
    ---

    drivers/isdn/gigaset/ev-layer.c | 1981 ++++++++++++++++++++++++++++++++++++++++
    1 files changed, 1981 insertions(+)

    --- linux-2.6.16-rc4.orig/drivers/isdn/gigaset/ev-layer.c 1970-01-01 01:00:00.000000000 +0100
    +++ linux-2.6.16-rc4-mm2/drivers/isdn/gigaset/ev-layer.c 2006-02-24 00:19:28.000000000 +0100
    @@ -0,0 +1,1981 @@
    +/*
    + * Stuff used by all variants of the driver
    + *
    + * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>,
    + * Hansjoerg Lipp <hjlipp@web.de>,
    + * Tilman Schmidt <tilman@imap.cc>.
    + *
    + * =====================================================================
    + * 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.
    + * =====================================================================
    + */
    +
    +#include "gigaset.h"
    +
    +/* ========================================================== */
    +/* bit masks for pending commands */
    +#define PC_DIAL 0x001
    +#define PC_HUP 0x002
    +#define PC_INIT 0x004
    +#define PC_DLE0 0x008
    +#define PC_DLE1 0x010
    +#define PC_SHUTDOWN 0x020
    +#define PC_ACCEPT 0x040
    +#define PC_CID 0x080
    +#define PC_NOCID 0x100
    +#define PC_CIDMODE 0x200
    +#define PC_UMMODE 0x400
    +
    +/* types of modem responses */
    +#define RT_NOTHING 0
    +#define RT_ZSAU 1
    +#define RT_RING 2
    +#define RT_NUMBER 3
    +#define RT_STRING 4
    +#define RT_HEX 5
    +#define RT_ZCAU 6
    +
    +/* Possible ASCII responses */
    +#define RSP_OK 0
    +//#define RSP_BUSY 1
    +//#define RSP_CONNECT 2
    +#define RSP_ZGCI 3
    +#define RSP_RING 4
    +#define RSP_ZAOC 5
    +#define RSP_ZCSTR 6
    +#define RSP_ZCFGT 7
    +#define RSP_ZCFG 8
    +#define RSP_ZCCR 9
    +#define RSP_EMPTY 10
    +#define RSP_ZLOG 11
    +#define RSP_ZCAU 12
    +#define RSP_ZMWI 13
    +#define RSP_ZABINFO 14
    +#define RSP_ZSMLSTCHG 15
    +#define RSP_VAR 100
    +#define RSP_ZSAU (RSP_VAR + VAR_ZSAU)
    +#define RSP_ZDLE (RSP_VAR + VAR_ZDLE)
    +#define RSP_ZVLS (RSP_VAR + VAR_ZVLS)
    +#define RSP_ZCTP (RSP_VAR + VAR_ZCTP)
    +#define RSP_STR (RSP_VAR + VAR_NUM)
    +#define RSP_NMBR (RSP_STR + STR_NMBR)
    +#define RSP_ZCPN (RSP_STR + STR_ZCPN)
    +#define RSP_ZCON (RSP_STR + STR_ZCON)
    +#define RSP_ZBC (RSP_STR + STR_ZBC)
    +#define RSP_ZHLC (RSP_STR + STR_ZHLC)
    +#define RSP_ERROR -1 /* ERROR */
    +#define RSP_WRONG_CID -2 /* unknown cid in cmd */
    +//#define RSP_EMPTY -3
    +#define RSP_UNKNOWN -4 /* unknown response */
    +#define RSP_FAIL -5 /* internal error */
    +#define RSP_INVAL -6 /* invalid response */
    +
    +#define RSP_NONE -19
    +#define RSP_STRING -20
    +#define RSP_NULL -21
    +//#define RSP_RETRYFAIL -22
    +//#define RSP_RETRY -23
    +//#define RSP_SKIP -24
    +#define RSP_INIT -27
    +#define RSP_ANY -26
    +#define RSP_LAST -28
    +#define RSP_NODEV -9
    +
    +/* actions for process_response */
    +#define ACT_NOTHING 0
    +#define ACT_SETDLE1 1
    +#define ACT_SETDLE0 2
    +#define ACT_FAILINIT 3
    +#define ACT_HUPMODEM 4
    +#define ACT_CONFIGMODE 5
    +#define ACT_INIT 6
    +#define ACT_DLE0 7
    +#define ACT_DLE1 8
    +#define ACT_FAILDLE0 9
    +#define ACT_FAILDLE1 10
    +#define ACT_RING 11
    +#define ACT_CID 12
    +#define ACT_FAILCID 13
    +#define ACT_SDOWN 14
    +#define ACT_FAILSDOWN 15
    +#define ACT_DEBUG 16
    +#define ACT_WARN 17
    +#define ACT_DIALING 18
    +#define ACT_ABORTDIAL 19
    +#define ACT_DISCONNECT 20
    +#define ACT_CONNECT 21
    +#define ACT_REMOTEREJECT 22
    +#define ACT_CONNTIMEOUT 23
    +#define ACT_REMOTEHUP 24
    +#define ACT_ABORTHUP 25
    +#define ACT_ICALL 26
    +#define ACT_ACCEPTED 27
    +#define ACT_ABORTACCEPT 28
    +#define ACT_TIMEOUT 29
    +#define ACT_GETSTRING 30
    +#define ACT_SETVER 31
    +#define ACT_FAILVER 32
    +#define ACT_GOTVER 33
    +#define ACT_TEST 34
    +#define ACT_ERROR 35
    +#define ACT_ABORTCID 36
    +#define ACT_ZCAU 37
    +#define ACT_NOTIFY_BC_DOWN 38
    +#define ACT_NOTIFY_BC_UP 39
    +#define ACT_DIAL 40
    +#define ACT_ACCEPT 41
    +#define ACT_PROTO_L2 42
    +#define ACT_HUP 43
    +#define ACT_IF_LOCK 44
    +#define ACT_START 45
    +#define ACT_STOP 46
    +#define ACT_FAKEDLE0 47
    +#define ACT_FAKEHUP 48
    +#define ACT_FAKESDOWN 49
    +#define ACT_SHUTDOWN 50
    +#define ACT_PROC_CIDMODE 51
    +#define ACT_UMODESET 52
    +#define ACT_FAILUMODE 53
    +#define ACT_CMODESET 54
    +#define ACT_FAILCMODE 55
    +#define ACT_IF_VER 56
    +#define ACT_CMD 100
    +
    +/* at command sequences */
    +#define SEQ_NONE 0
    +#define SEQ_INIT 100
    +#define SEQ_DLE0 200
    +#define SEQ_DLE1 250
    +#define SEQ_CID 300
    +#define SEQ_NOCID 350
    +#define SEQ_HUP 400
    +#define SEQ_DIAL 600
    +#define SEQ_ACCEPT 720
    +#define SEQ_SHUTDOWN 500
    +#define SEQ_CIDMODE 10
    +#define SEQ_UMMODE 11
    +
    +
    +// 100: init, 200: dle0, 250:dle1, 300: get cid (dial), 350: "hup" (no cid), 400: hup, 500: reset, 600: dial, 700: ring
    +struct reply_t gigaset_tab_nocid_m10x[]= /* with dle mode */
    +{
    + /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
    +
    + /* initialize device, set cid mode if possible */
    + //{RSP_INIT, -1, -1,100, 900, 0, {ACT_TEST}},
    + //{RSP_ERROR, 900,900, -1, 0, 0, {ACT_FAILINIT}},
    + //{RSP_OK, 900,900, -1, 100, INIT_TIMEOUT,
    + // {ACT_TIMEOUT}},
    +
    + {RSP_INIT, -1, -1,SEQ_INIT, 100, INIT_TIMEOUT,
    + {ACT_TIMEOUT}}, /* wait until device is ready */
    +
    + {EV_TIMEOUT, 100,100, -1, 101, 3, {0}, "Z\r"}, /* device in transparent mode? try to initialize it. */
    + {RSP_OK, 101,103, -1, 120, 5, {ACT_GETSTRING}, "+GMR\r"}, /* get version */
    +
    + {EV_TIMEOUT, 101,101, -1, 102, 5, {0}, "Z\r"}, /* timeout => try once again. */
    + {RSP_ERROR, 101,101, -1, 102, 5, {0}, "Z\r"}, /* error => try once again. */
    +
    + {EV_TIMEOUT, 102,102, -1, 108, 5, {ACT_SETDLE1}, "^SDLE=0\r"}, /* timeout => try again in DLE mode. */
    + {RSP_OK, 108,108, -1, 104,-1},
    + {RSP_ZDLE, 104,104, 0, 103, 5, {0}, "Z\r"},
    + {EV_TIMEOUT, 104,104, -1, 0, 0, {ACT_FAILINIT}},
    + {RSP_ERROR, 108,108, -1, 0, 0, {ACT_FAILINIT}},
    +
    + {EV_TIMEOUT, 108,108, -1, 105, 2, {ACT_SETDLE0,
    + ACT_HUPMODEM,
    + ACT_TIMEOUT}}, /* still timeout => connection in unimodem mode? */
    + {EV_TIMEOUT, 105,105, -1, 103, 5, {0}, "Z\r"},
    +
    + {RSP_ERROR, 102,102, -1, 107, 5, {0}, "^GETPRE\r"}, /* ERROR on ATZ => maybe in config mode? */
    + {RSP_OK, 107,107, -1, 0, 0, {ACT_CONFIGMODE}},
    + {RSP_ERROR, 107,107, -1, 0, 0, {ACT_FAILINIT}},
    + {EV_TIMEOUT, 107,107, -1, 0, 0, {ACT_FAILINIT}},
    +
    + {RSP_ERROR, 103,103, -1, 0, 0, {ACT_FAILINIT}},
    + {EV_TIMEOUT, 103,103, -1, 0, 0, {ACT_FAILINIT}},
    +
    + {RSP_STRING, 120,120, -1, 121,-1, {ACT_SETVER}},
    +
    + {EV_TIMEOUT, 120,121, -1, 0, 0, {ACT_FAILVER, ACT_INIT}},
    + {RSP_ERROR, 120,121, -1, 0, 0, {ACT_FAILVER, ACT_INIT}},
    + {RSP_OK, 121,121, -1, 0, 0, {ACT_GOTVER, ACT_INIT}},
    +#if 0
    + {EV_TIMEOUT, 120,121, -1, 130, 5, {ACT_FAILVER}, "^SGCI=1\r"},
    + {RSP_ERROR, 120,121, -1, 130, 5, {ACT_FAILVER}, "^SGCI=1\r"},
    + {RSP_OK, 121,121, -1, 130, 5, {ACT_GOTVER}, "^SGCI=1\r"},
    +
    + {RSP_OK, 130,130, -1, 0, 0, {ACT_INIT}},
    + {RSP_ERROR, 130,130, -1, 0, 0, {ACT_FAILINIT}},
    + {EV_TIMEOUT, 130,130, -1, 0, 0, {ACT_FAILINIT}},
    +#endif
    +
    + /* leave dle mode */
    + {RSP_INIT, 0, 0,SEQ_DLE0, 201, 5, {0}, "^SDLE=0\r"},
    + {RSP_OK, 201,201, -1, 202,-1},
    + //{RSP_ZDLE, 202,202, 0, 202, 0, {ACT_ERROR}},//DELETE
    + {RSP_ZDLE, 202,202, 0, 0, 0, {ACT_DLE0}},
    + {RSP_NODEV, 200,249, -1, 0, 0, {ACT_FAKEDLE0}},
    + {RSP_ERROR, 200,249, -1, 0, 0, {ACT_FAILDLE0}},
    + {EV_TIMEOUT, 200,249, -1, 0, 0, {ACT_FAILDLE0}},
    +
    + /* enter dle mode */
    + {RSP_INIT, 0, 0,SEQ_DLE1, 251, 5, {0}, "^SDLE=1\r"},
    + {RSP_OK, 251,251, -1, 252,-1},
    + {RSP_ZDLE, 252,252, 1, 0, 0, {ACT_DLE1}},
    + {RSP_ERROR, 250,299, -1, 0, 0, {ACT_FAILDLE1}},
    + {EV_TIMEOUT, 250,299, -1, 0, 0, {ACT_FAILDLE1}},
    +
    + /* incoming call */
    + {RSP_RING, -1, -1, -1, -1,-1, {ACT_RING}},
    +
    + /* get cid */
    + //{RSP_INIT, 0, 0,300, 901, 0, {ACT_TEST}},
    + //{RSP_ERROR, 901,901, -1, 0, 0, {ACT_FAILCID}},
    + //{RSP_OK, 901,901, -1, 301, 5, {0}, "^SGCI?\r"},
    +
    + {RSP_INIT, 0, 0,SEQ_CID, 301, 5, {0}, "^SGCI?\r"},
    + {RSP_OK, 301,301, -1, 302,-1},
    + {RSP_ZGCI, 302,302, -1, 0, 0, {ACT_CID}},
    + {RSP_ERROR, 301,349, -1, 0, 0, {ACT_FAILCID}},
    + {EV_TIMEOUT, 301,349, -1, 0, 0, {ACT_FAILCID}},
    +
    + /* enter cid mode */
    + {RSP_INIT, 0, 0,SEQ_CIDMODE, 150, 5, {0}, "^SGCI=1\r"},
    + {RSP_OK, 150,150, -1, 0, 0, {ACT_CMODESET}},
    + {RSP_ERROR, 150,150, -1, 0, 0, {ACT_FAILCMODE}},
    + {EV_TIMEOUT, 150,150, -1, 0, 0, {ACT_FAILCMODE}},
    +
    + /* leave cid mode */
    + //{RSP_INIT, 0, 0,SEQ_UMMODE, 160, 5, {0}, "^SGCI=0\r"},
    + {RSP_INIT, 0, 0,SEQ_UMMODE, 160, 5, {0}, "Z\r"},
    + {RSP_OK, 160,160, -1, 0, 0, {ACT_UMODESET}},
    + {RSP_ERROR, 160,160, -1, 0, 0, {ACT_FAILUMODE}},
    + {EV_TIMEOUT, 160,160, -1, 0, 0, {ACT_FAILUMODE}},
    +
    + /* abort getting cid */
    + {RSP_INIT, 0, 0,SEQ_NOCID, 0, 0, {ACT_ABORTCID}},
    +
    + /* reset */
    +#if 0
    + {RSP_INIT, 0, 0,SEQ_SHUTDOWN, 503, 5, {0}, "^SGCI=0\r"},
    + {RSP_OK, 503,503, -1, 504, 5, {0}, "Z\r"},
    +#endif
    + {RSP_INIT, 0, 0,SEQ_SHUTDOWN, 504, 5, {0}, "Z\r"},
    + {RSP_OK, 504,504, -1, 0, 0, {ACT_SDOWN}},
    + {RSP_ERROR, 501,599, -1, 0, 0, {ACT_FAILSDOWN}},
    + {EV_TIMEOUT, 501,599, -1, 0, 0, {ACT_FAILSDOWN}},
    + {RSP_NODEV, 501,599, -1, 0, 0, {ACT_FAKESDOWN}},
    +
    + {EV_PROC_CIDMODE,-1, -1, -1, -1,-1, {ACT_PROC_CIDMODE}}, //FIXME
    + {EV_IF_LOCK, -1, -1, -1, -1,-1, {ACT_IF_LOCK}}, //FIXME
    + {EV_IF_VER, -1, -1, -1, -1,-1, {ACT_IF_VER}}, //FIXME
    + {EV_START, -1, -1, -1, -1,-1, {ACT_START}}, //FIXME
    + {EV_STOP, -1, -1, -1, -1,-1, {ACT_STOP}}, //FIXME
    + {EV_SHUTDOWN, -1, -1, -1, -1,-1, {ACT_SHUTDOWN}}, //FIXME
    +
    + /* misc. */
    + {RSP_EMPTY, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZCFGT, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZCFG, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZLOG, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZMWI, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZABINFO, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZSMLSTCHG,-1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    +
    + {RSP_ZCAU, -1, -1, -1, -1,-1, {ACT_ZCAU}},
    + {RSP_NONE, -1, -1, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ANY, -1, -1, -1, -1,-1, {ACT_WARN}},
    + {RSP_LAST}
    +};
    +
    +// 600: start dialing, 650: dial in progress, 800: connection is up, 700: ring, 400: hup, 750: accepted icall
    +struct reply_t gigaset_tab_cid_m10x[] = /* for M10x */
    +{
    + /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
    +
    + /* dial */
    + {EV_DIAL, -1, -1, -1, -1,-1, {ACT_DIAL}}, //FIXME
    + {RSP_INIT, 0, 0,SEQ_DIAL, 601, 5, {ACT_CMD+AT_BC}},
    + {RSP_OK, 601,601, -1, 602, 5, {ACT_CMD+AT_HLC}},
    + {RSP_NULL, 602,602, -1, 603, 5, {ACT_CMD+AT_PROTO}},
    + {RSP_OK, 602,602, -1, 603, 5, {ACT_CMD+AT_PROTO}},
    + {RSP_OK, 603,603, -1, 604, 5, {ACT_CMD+AT_TYPE}},
    + {RSP_OK, 604,604, -1, 605, 5, {ACT_CMD+AT_MSN}},
    + {RSP_OK, 605,605, -1, 606, 5, {ACT_CMD+AT_ISO}},
    + {RSP_NULL, 605,605, -1, 606, 5, {ACT_CMD+AT_ISO}},
    + {RSP_OK, 606,606, -1, 607, 5, {0}, "+VLS=17\r"}, /* set "Endgeraetemodus" */
    + {RSP_OK, 607,607, -1, 608,-1},
    + //{RSP_ZSAU, 608,608,ZSAU_PROCEEDING, 608, 0, {ACT_ERROR}},//DELETE
    + {RSP_ZSAU, 608,608,ZSAU_PROCEEDING, 609, 5, {ACT_CMD+AT_DIAL}},
    + {RSP_OK, 609,609, -1, 650, 0, {ACT_DIALING}},
    +
    + {RSP_ZVLS, 608,608, 17, -1,-1, {ACT_DEBUG}},
    + {RSP_ZCTP, 609,609, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ZCPN, 609,609, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ERROR, 601,609, -1, 0, 0, {ACT_ABORTDIAL}},
    + {EV_TIMEOUT, 601,609, -1, 0, 0, {ACT_ABORTDIAL}},
    +
    + /* dialing */
    + {RSP_ZCTP, 650,650, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ZCPN, 650,650, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ZSAU, 650,650,ZSAU_CALL_DELIVERED, -1,-1, {ACT_DEBUG}}, /* some devices don't send this */
    +
    + /* connection established */
    + {RSP_ZSAU, 650,650,ZSAU_ACTIVE, 800,-1, {ACT_CONNECT}}, //FIXME -> DLE1
    + {RSP_ZSAU, 750,750,ZSAU_ACTIVE, 800,-1, {ACT_CONNECT}}, //FIXME -> DLE1
    +
    + {EV_BC_OPEN, 800,800, -1, 800,-1, {ACT_NOTIFY_BC_UP}}, //FIXME new constate + timeout
    +
    + /* remote hangup */
    + {RSP_ZSAU, 650,650,ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEREJECT}},
    + {RSP_ZSAU, 750,750,ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP}},
    + {RSP_ZSAU, 800,800,ZSAU_DISCONNECT_IND, 0, 0, {ACT_REMOTEHUP}},
    +
    + /* hangup */
    + {EV_HUP, -1, -1, -1, -1,-1, {ACT_HUP}}, //FIXME
    + {RSP_INIT, -1, -1,SEQ_HUP, 401, 5, {0}, "+VLS=0\r"}, /* hang up */ //-1,-1?
    + {RSP_OK, 401,401, -1, 402, 5},
    + {RSP_ZVLS, 402,402, 0, 403, 5},
    + {RSP_ZSAU, 403,403,ZSAU_DISCONNECT_REQ, -1,-1, {ACT_DEBUG}}, /* if not remote hup */
    + //{RSP_ZSAU, 403,403,ZSAU_NULL, 401, 0, {ACT_ERROR}}, //DELETE//FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
    + {RSP_ZSAU, 403,403,ZSAU_NULL, 0, 0, {ACT_DISCONNECT}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
    + {RSP_NODEV, 401,403, -1, 0, 0, {ACT_FAKEHUP}}, //FIXME -> DLE0 // should we do this _before_ hanging up for base driver?
    + {RSP_ERROR, 401,401, -1, 0, 0, {ACT_ABORTHUP}},
    + {EV_TIMEOUT, 401,403, -1, 0, 0, {ACT_ABORTHUP}},
    +
    + {EV_BC_CLOSED, 0, 0, -1, 0,-1, {ACT_NOTIFY_BC_DOWN}}, //FIXME new constate + timeout
    +
    + /* ring */
    + {RSP_ZBC, 700,700, -1, -1,-1, {0}},
    + {RSP_ZHLC, 700,700, -1, -1,-1, {0}},
    + {RSP_NMBR, 700,700, -1, -1,-1, {0}},
    + {RSP_ZCPN, 700,700, -1, -1,-1, {0}},
    + {RSP_ZCTP, 700,700, -1, -1,-1, {0}},
    + {EV_TIMEOUT, 700,700, -1, 720,720, {ACT_ICALL}},
    + {EV_BC_CLOSED,720,720, -1, 0,-1, {ACT_NOTIFY_BC_DOWN}},
    +
    + /*accept icall*/
    + {EV_ACCEPT, -1, -1, -1, -1,-1, {ACT_ACCEPT}}, //FIXME
    + {RSP_INIT, 720,720,SEQ_ACCEPT, 721, 5, {ACT_CMD+AT_PROTO}},
    + {RSP_OK, 721,721, -1, 722, 5, {ACT_CMD+AT_ISO}},
    + {RSP_OK, 722,722, -1, 723, 5, {0}, "+VLS=17\r"}, /* set "Endgeraetemodus" */
    + {RSP_OK, 723,723, -1, 724, 5, {0}},
    + {RSP_ZVLS, 724,724, 17, 750,50, {ACT_ACCEPTED}},
    + {RSP_ERROR, 721,729, -1, 0, 0, {ACT_ABORTACCEPT}},
    + {EV_TIMEOUT, 721,729, -1, 0, 0, {ACT_ABORTACCEPT}},
    + {RSP_ZSAU, 700,729,ZSAU_NULL, 0, 0, {ACT_ABORTACCEPT}},
    + {RSP_ZSAU, 700,729,ZSAU_ACTIVE, 0, 0, {ACT_ABORTACCEPT}},
    + {RSP_ZSAU, 700,729,ZSAU_DISCONNECT_IND, 0, 0, {ACT_ABORTACCEPT}},
    +
    + {EV_TIMEOUT, 750,750, -1, 0, 0, {ACT_CONNTIMEOUT}},
    +
    + /* misc. */
    + {EV_PROTO_L2, -1, -1, -1, -1,-1, {ACT_PROTO_L2}}, //FIXME
    +
    + {RSP_ZCON, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZCCR, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZAOC, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    + {RSP_ZCSTR, -1, -1, -1, -1,-1, {ACT_DEBUG}}, //FIXME
    +
    + {RSP_ZCAU, -1, -1, -1, -1,-1, {ACT_ZCAU}},
    + {RSP_NONE, -1, -1, -1, -1,-1, {ACT_DEBUG}},
    + {RSP_ANY, -1, -1, -1, -1,-1, {ACT_WARN}},
    + {RSP_LAST}
    +};
    +
    +
    +#if 0
    +static struct reply_t tab_nocid[]= /* no dle mode */ //FIXME
    +{
    + /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
    +
    + {RSP_ANY, -1, -1, -1, -1,-1, ACT_WARN, NULL},
    + {RSP_LAST,0,0,0,0,0,0}
    +};
    +
    +static struct reply_t tab_cid[] = /* no dle mode */ //FIXME
    +{
    + /* resp_code, min_ConState, max_ConState, parameter, new_ConState, timeout, action, command */
    +
    + {RSP_ANY, -1, -1, -1, -1,-1, ACT_WARN, NULL},
    + {RSP_LAST,0,0,0,0,0,0}
    +};
    +#endif
    +
    +static struct resp_type_t resp_type[]=
    +{
    + /*{"", RSP_EMPTY, RT_NOTHING},*/
    + {"OK", RSP_OK, RT_NOTHING},
    + {"ERROR", RSP_ERROR, RT_NOTHING},
    + {"ZSAU", RSP_ZSAU, RT_ZSAU},
    + {"ZCAU", RSP_ZCAU, RT_ZCAU},
    + {"RING", RSP_RING, RT_RING},
    + {"ZGCI", RSP_ZGCI, RT_NUMBER},
    + {"ZVLS", RSP_ZVLS, RT_NUMBER},
    + {"ZCTP", RSP_ZCTP, RT_NUMBER},
    + {"ZDLE", RSP_ZDLE, RT_NUMBER},
    + {"ZCFGT", RSP_ZCFGT, RT_NUMBER},
    + {"ZCCR", RSP_ZCCR, RT_NUMBER},
    + {"ZMWI", RSP_ZMWI, RT_NUMBER},
    + {"ZHLC", RSP_ZHLC, RT_STRING},
    + {"ZBC", RSP_ZBC, RT_STRING},
    + {"NMBR", RSP_NMBR, RT_STRING},
    + {"ZCPN", RSP_ZCPN, RT_STRING},
    + {"ZCON", RSP_ZCON, RT_STRING},
    + {"ZAOC", RSP_ZAOC, RT_STRING},
    + {"ZCSTR", RSP_ZCSTR, RT_STRING},
    + {"ZCFG", RSP_ZCFG, RT_HEX},
    + {"ZLOG", RSP_ZLOG, RT_NOTHING},
    + {"ZABINFO", RSP_ZABINFO, RT_NOTHING},
    + {"ZSMLSTCHG", RSP_ZSMLSTCHG, RT_NOTHING},
    + {NULL,0,0}
    +};
    +
    +/*
    + * Get integer from char-pointer
    + */
    +static int isdn_getnum(char *p)
    +{
    + int v = -1;
    +
    + IFNULLRETVAL(p, -1);
    +
    + gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
    +
    + while (*p >= '0' && *p <= '9')
    + v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p++) - '0');
    + if (*p)
    + v = -1; /* invalid Character */
    + return v;
    +}
    +
    +/*
    + * Get integer from char-pointer
    + */
    +static int isdn_gethex(char *p)
    +{
    + int v = 0;
    + int c;
    +
    + IFNULLRETVAL(p, -1);
    +
    + gig_dbg(DEBUG_TRANSCMD, "string: %s", p);
    +
    + if (!*p)
    + return -1;
    +
    + do {
    + if (v > (INT_MAX - 15) / 16)
    + return -1;
    + c = *p;
    + if (c >= '0' && c <= '9')
    + c -= '0';
    + else if (c >= 'a' && c <= 'f')
    + c -= 'a' - 10;
    + else if (c >= 'A' && c <= 'F')
    + c -= 'A' - 10;
    + else
    + return -1;
    + v = v * 16 + c;
    + } while (*++p);
    +
    + return v;
    +}
    +
    +static inline void new_index(atomic_t *index, int max)
    +{
    + if (atomic_read(index) == max) //FIXME race?
    + atomic_set(index, 0);
    + else
    + atomic_inc(index);
    +}
    +
    +/* retrieve CID from parsed response
    + * returns 0 if no CID, -1 if invalid CID, or CID value 1..65535
    + */
    +static int cid_of_response(char *s)
    +{
    + int cid;
    +
    + if (s[-1] != ';')
    + return 0; /* no CID separator */
    + cid = isdn_getnum(s);
    + if (cid < 0)
    + return 0; /* CID not numeric */
    + if (cid < 1 || cid > 65535)
    + return -1; /* CID out of range */
    + return cid;
    + //FIXME is ;<digit>+ at end of non-CID response really impossible?
    +}
    +
    +/* This function will be called via task queue from the callback handler.
    + * We received a modem response and have to handle it..
    + */
    +void gigaset_handle_modem_response(struct cardstate *cs)
    +{
    + unsigned char *argv[MAX_REC_PARAMS + 1];
    + int params;
    + int i, j;
    + struct resp_type_t *rt;
    + int curarg;
    + unsigned long flags;
    + unsigned next, tail, head;
    + struct event_t *event;
    + int resp_code;
    + int param_type;
    + int abort;
    + size_t len;
    + int cid;
    + int rawstring;
    +
    + IFNULLRET(cs);
    +
    + len = cs->cbytes;
    + if (!len) {
    + /* ignore additional LFs/CRs (M10x config mode or cx100) */
    + gig_dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
    + return;
    + }
    + cs->respdata[len] = 0;
    + gig_dbg(DEBUG_TRANSCMD, "raw string: '%s'", cs->respdata);
    + argv[0] = cs->respdata;
    + params = 1;
    + if (cs->at_state.getstring) {
    + /* getstring only allowed without cid at the moment */
    + cs->at_state.getstring = 0;
    + rawstring = 1;
    + cid = 0;
    + } else {
    + /* parse line */
    + for (i = 0; i < len; i++)
    + switch (cs->respdata[i]) {
    + case ';':
    + case ',':
    + case '=':
    + if (params > MAX_REC_PARAMS) {
    + dev_warn(cs->dev,
    + "too many parameters in response\n");
    + /* need last parameter (might be CID) */
    + params--;
    + }
    + argv[params++] = cs->respdata + i + 1;
    + }
    +
    + rawstring = 0;
    + cid = params > 1 ? cid_of_response(argv[params-1]) : 0;
    + if (cid < 0) {
    + gigaset_add_event(cs, &cs->at_state, RSP_INVAL,
    + NULL, 0, NULL);
    + return;
    + }
    +
    + for (j = 1; j < params; ++j)
    + argv[j][-1] = 0;
    +
    + gig_dbg(DEBUG_TRANSCMD, "CMD received: %s", argv[0]);
    + if (cid) {
    + --params;
    + gig_dbg(DEBUG_TRANSCMD, "CID: %s", argv[params]);
    + }
    + gig_dbg(DEBUG_TRANSCMD, "available params: %d", params - 1);
    + for (j = 1; j < params; j++)
    + gig_dbg(DEBUG_TRANSCMD, "param %d: %s", j, argv[j]);
    + }
    +
    + spin_lock_irqsave(&cs->ev_lock, flags);
    + head = atomic_read(&cs->ev_head);
    + tail = atomic_read(&cs->ev_tail);
    +
    + abort = 1;
    + curarg = 0;
    + while (curarg < params) {
    + next = (tail + 1) % MAX_EVENTS;
    + if (unlikely(next == head)) {
    + dev_err(cs->dev, "event queue full\n");
    + break;
    + }
    +
    + event = cs->events + tail;
    + event->at_state = NULL;
    + event->cid = cid;
    + event->ptr = NULL;
    + event->arg = NULL;
    + tail = next;
    +
    + if (rawstring) {
    + resp_code = RSP_STRING;
    + param_type = RT_STRING;
    + } else {
    + for (rt = resp_type; rt->response; ++rt)
    + if (!strcmp(argv[curarg], rt->response))
    + break;
    +
    + if (!rt->response) {
    + event->type = RSP_UNKNOWN;
    + dev_warn(cs->dev,
    + "unknown modem response: %s\n",
    + argv[curarg]);
    + break;
    + }
    +
    + resp_code = rt->resp_code;
    + param_type = rt->type;
    + ++curarg;
    + }
    +
    + event->type = resp_code;
    +
    + switch (param_type) {
    + case RT_NOTHING:
    + break;
    + case RT_RING:
    + if (!cid) {
    + dev_err(cs->dev,
    + "received RING without CID!\n");
    + event->type = RSP_INVAL;
    + abort = 1;
    + } else {
    + event->cid = 0;
    + event->parameter = cid;
    + abort = 0;
    + }
    + break;
    + case RT_ZSAU:
    + if (curarg >= params) {
    + event->parameter = ZSAU_NONE;
    + break;
    + }
    + if (!strcmp(argv[curarg], "OUTGOING_CALL_PROCEEDING"))
    + event->parameter = ZSAU_OUTGOING_CALL_PROCEEDING;
    + else if (!strcmp(argv[curarg], "CALL_DELIVERED"))
    + event->parameter = ZSAU_CALL_DELIVERED;
    + else if (!strcmp(argv[curarg], "ACTIVE"))
    + event->parameter = ZSAU_ACTIVE;
    + else if (!strcmp(argv[curarg], "DISCONNECT_IND"))
    + event->parameter = ZSAU_DISCONNECT_IND;
    + else if (!strcmp(argv[curarg], "NULL"))
    + event->parameter = ZSAU_NULL;
    + else if (!strcmp(argv[curarg], "DISCONNECT_REQ"))
    + event->parameter = ZSAU_DISCONNECT_REQ;
    + else {
    + event->parameter = ZSAU_UNKNOWN;
    + dev_warn(cs->dev,
    + "%s: unknown parameter %s after ZSAU\n",
    + __func__, argv[curarg]);
    + }
    + ++curarg;
    + break;
    + case RT_STRING:
    + if (curarg < params) {
    + event->ptr = kstrdup(argv[curarg], GFP_ATOMIC);
    + if (!event->ptr)
    + dev_err(cs->dev, "out of memory\n");
    + ++curarg;
    + }
    +#ifdef CONFIG_GIGASET_DEBUG
    + if (!event->ptr)
    + gig_dbg(DEBUG_CMD, "string==NULL");
    + else
    + gig_dbg(DEBUG_CMD, "string==%s",
    + (char *) event->ptr);
    +#endif
    + break;
    + case RT_ZCAU:
    + event->parameter = -1;
    + if (curarg + 1 < params) {
    + i = isdn_gethex(argv[curarg]);
    + j = isdn_gethex(argv[curarg + 1]);
    + if (i >= 0 && i < 256 && j >= 0 && j < 256)
    + event->parameter = (unsigned) i << 8
    + | j;
    + curarg += 2;
    + } else
    + curarg = params - 1;
    + break;
    + case RT_NUMBER:
    + case RT_HEX:
    + if (curarg < params) {
    + if (param_type == RT_HEX)
    + event->parameter =
    + isdn_gethex(argv[curarg]);
    + else
    + event->parameter =
    + isdn_getnum(argv[curarg]);
    + ++curarg;
    + } else
    + event->parameter = -1;
    +#ifdef CONFIG_GIGASET_DEBUG
    + gig_dbg(DEBUG_CMD, "parameter==%d", event->parameter);
    +#endif
    + break;
    + }
    +
    + if (resp_code == RSP_ZDLE)
    + cs->dle = event->parameter;
    +
    + if (abort)
    + break;
    + }
    +
    + atomic_set(&cs->ev_tail, tail);
    + spin_unlock_irqrestore(&cs->ev_lock, flags);
    +
    + if (curarg != params)
    + gig_dbg(DEBUG_ANY,
    + "invalid number of processed parameters: %d/%d",
    + curarg, params);
    +}
    +EXPORT_SYMBOL_GPL(gigaset_handle_modem_response);
    +
    +/* disconnect
    + * process closing of connection associated with given AT state structure
    + */
    +static void disconnect(struct at_state_t **at_state_p)
    +{
    + unsigned long flags;
    + struct bc_state *bcs;
    + struct cardstate *cs;
    +
    + IFNULLRET(at_state_p);
    + IFNULLRET(*at_state_p);
    + bcs = (*at_state_p)->bcs;
    + cs = (*at_state_p)->cs;
    + IFNULLRET(cs);
    +
    + new_index(&(*at_state_p)->seq_index, MAX_SEQ_INDEX);
    +
    + /* revert to selected idle mode */
    + if (!atomic_read(&cs->cidmode)) {
    + cs->at_state.pending_commands |= PC_UMMODE;
    + atomic_set(&cs->commands_pending, 1); //FIXME
    + gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
    + }
    +
    + if (bcs) {
    + /* B channel assigned: invoke hardware specific handler */
    + cs->ops->close_bchannel(bcs);
    + } else {
    + /* no B channel assigned: just deallocate */
    + spin_lock_irqsave(&cs->lock, flags);
    + list_del(&(*at_state_p)->list);
    + kfree(*at_state_p);
    + *at_state_p = NULL;
    + spin_unlock_irqrestore(&cs->lock, flags);
    + }
    +}
    +
    +/* get_free_channel
    + * get a free AT state structure: either one of those associated with the
    + * B channels of the Gigaset device, or if none of those is available,
    + * a newly allocated one with bcs=NULL
    + * The structure should be freed by calling disconnect() after use.
    + */
    +static inline struct at_state_t *get_free_channel(struct cardstate *cs,
    + int cid)
    +/* cids: >0: siemens-cid
    + 0: without cid
    + -1: no cid assigned yet
    +*/
    +{
    + unsigned long flags;
    + int i;
    + struct at_state_t *ret;
    +
    + for (i = 0; i < cs->channels; ++i)
    + if (gigaset_get_channel(cs->bcs + i)) {
    + ret = &cs->bcs[i].at_state;
    + ret->cid = cid;
    + return ret;
    + }
    +
    + spin_lock_irqsave(&cs->lock, flags);
    + ret = kmalloc(sizeof(struct at_state_t), GFP_ATOMIC);
    + if (ret) {
    + gigaset_at_init(ret, NULL, cs, cid);
    + list_add(&ret->list, &cs->temp_at_states);
    + }
    + spin_unlock_irqrestore(&cs->lock, flags);
    + return ret;
    +}
    +
    +static void init_failed(struct cardstate *cs, int mode)
    +{
    + int i;
    + struct at_state_t *at_state;
    +
    + cs->at_state.pending_commands &= ~PC_INIT;
    + atomic_set(&cs->mode, mode);
    + atomic_set(&cs->mstate, MS_UNINITIALIZED);
    + gigaset_free_channels(cs);
    + for (i = 0; i < cs->channels; ++i) {
    + at_state = &cs->bcs[i].at_state;
    + if (at_state->pending_commands & PC_CID) {
    + at_state->pending_commands &= ~PC_CID;
    + at_state->pending_commands |= PC_NOCID;
    + atomic_set(&cs->commands_pending, 1);
    + }
    + }
    +}
    +
    +static void schedule_init(struct cardstate *cs, int state)
    +{
    + if (cs->at_state.pending_commands & PC_INIT) {
    + gig_dbg(DEBUG_CMD, "not scheduling PC_INIT again");
    + return;
    + }
    + atomic_set(&cs->mstate, state);
    + atomic_set(&cs->mode, M_UNKNOWN);
    + gigaset_block_channels(cs);
    + cs->at_state.pending_commands |= PC_INIT;
    + atomic_set(&cs->commands_pending, 1);
    + gig_dbg(DEBUG_CMD, "Scheduling PC_INIT");
    +}
    +
    +/* Add "AT" to a command, add the cid, dle encode it, send the result to the
    + hardware. */
    +static void send_command(struct cardstate *cs, const char *cmd, int cid,
    + int dle, gfp_t kmallocflags)
    +{
    + size_t cmdlen, buflen;
    + char *cmdpos, *cmdbuf, *cmdtail;
    +
    + cmdlen = strlen(cmd);
    + buflen = 11 + cmdlen;
    + if (unlikely(buflen <= cmdlen)) {
    + dev_err(cs->dev, "integer overflow in buflen\n");
    + return;
    + }
    +
    + cmdbuf = kmalloc(buflen, kmallocflags);
    + if (unlikely(!cmdbuf)) {
    + dev_err(cs->dev, "out of memory\n");
    + return;
    + }
    +
    + cmdpos = cmdbuf + 9;
    + cmdtail = cmdpos + cmdlen;
    + memcpy(cmdpos, cmd, cmdlen);
    +
    + if (cid > 0 && cid <= 65535) {
    + do {
    + *--cmdpos = '0' + cid % 10;
    + cid /= 10;
    + ++cmdlen;
    + } while (cid);
    + }
    +
    + cmdlen += 2;
    + *--cmdpos = 'T';
    + *--cmdpos = 'A';
    +
    + if (dle) {
    + cmdlen += 4;
    + *--cmdpos = '(';
    + *--cmdpos = 0x10;
    + *cmdtail++ = 0x10;
    + *cmdtail++ = ')';
    + }
    +
    + cs->ops->write_cmd(cs, cmdpos, cmdlen, NULL);
    + kfree(cmdbuf);
    +}
    +
    +static struct at_state_t *at_state_from_cid(struct cardstate *cs, int cid)
    +{
    + struct at_state_t *at_state;
    + int i;
    + unsigned long flags;
    +
    + if (cid == 0)
    + return &cs->at_state;
    +
    + for (i = 0; i < cs->channels; ++i)
    + if (cid == cs->bcs[i].at_state.cid)
    + return &cs->bcs[i].at_state;
    +
    + spin_lock_irqsave(&cs->lock, flags);
    +
    + list_for_each_entry(at_state, &cs->temp_at_states, list)
    + if (cid == at_state->cid) {
    + spin_unlock_irqrestore(&cs->lock, flags);
    + return at_state;
    + }
    +
    + spin_unlock_irqrestore(&cs->lock, flags);
    +
    + return NULL;
    +}
    +
    +static void bchannel_down(struct bc_state *bcs)
    +{
    + IFNULLRET(bcs);
    + IFNULLRET(bcs->cs);
    +
    + if (bcs->chstate & CHS_B_UP) {
    + bcs->chstate &= ~CHS_B_UP;
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
    + }
    +
    + if (bcs->chstate & (CHS_D_UP | CHS_NOTIFY_LL)) {
    + bcs->chstate &= ~(CHS_D_UP | CHS_NOTIFY_LL);
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
    + }
    +
    + gigaset_free_channel(bcs);
    +
    + gigaset_bcs_reinit(bcs);
    +}
    +
    +static void bchannel_up(struct bc_state *bcs)
    +{
    + IFNULLRET(bcs);
    +
    + if (!(bcs->chstate & CHS_D_UP)) {
    + dev_notice(bcs->cs->dev, "%s: D channel not up\n", __func__);
    + bcs->chstate |= CHS_D_UP;
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
    + }
    +
    + if (bcs->chstate & CHS_B_UP) {
    + dev_notice(bcs->cs->dev, "%s: B channel already up\n",
    + __func__);
    + return;
    + }
    +
    + bcs->chstate |= CHS_B_UP;
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
    +}
    +
    +static void start_dial(struct at_state_t *at_state, void *data, int seq_index)
    +{
    + struct bc_state *bcs = at_state->bcs;
    + struct cardstate *cs = at_state->cs;
    + int retval;
    +
    + bcs->chstate |= CHS_NOTIFY_LL;
    + //atomic_set(&bcs->status, BCS_INIT);
    +
    + if (atomic_read(&at_state->seq_index) != seq_index)
    + goto error;
    +
    + retval = gigaset_isdn_setup_dial(at_state, data);
    + if (retval != 0)
    + goto error;
    +
    +
    + at_state->pending_commands |= PC_CID;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_CID");
    + atomic_set(&cs->commands_pending, 1);
    + return;
    +
    +error:
    + at_state->pending_commands |= PC_NOCID;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_NOCID");
    + atomic_set(&cs->commands_pending, 1);
    + return;
    +}
    +
    +static void start_accept(struct at_state_t *at_state)
    +{
    + struct cardstate *cs = at_state->cs;
    + int retval;
    +
    + retval = gigaset_isdn_setup_accept(at_state);
    +
    + if (retval == 0) {
    + at_state->pending_commands |= PC_ACCEPT;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
    + atomic_set(&cs->commands_pending, 1);
    + } else {
    + //FIXME
    + at_state->pending_commands |= PC_HUP;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
    + atomic_set(&cs->commands_pending, 1);
    + }
    +}
    +
    +static void do_start(struct cardstate *cs)
    +{
    + gigaset_free_channels(cs);
    +
    + if (atomic_read(&cs->mstate) != MS_LOCKED)
    + schedule_init(cs, MS_INIT);
    +
    + gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
    + // FIXME: not in locked mode
    + // FIXME 2: only after init sequence
    +
    + cs->waiting = 0;
    + wake_up(&cs->waitqueue);
    +}
    +
    +static void finish_shutdown(struct cardstate *cs)
    +{
    + if (atomic_read(&cs->mstate) != MS_LOCKED) {
    + atomic_set(&cs->mstate, MS_UNINITIALIZED);
    + atomic_set(&cs->mode, M_UNKNOWN);
    + }
    +
    + /* The rest is done by cleanup_cs () in user mode. */
    +
    + cs->cmd_result = -ENODEV;
    + cs->waiting = 0;
    + wake_up_interruptible(&cs->waitqueue);
    +}
    +
    +static void do_shutdown(struct cardstate *cs)
    +{
    + gigaset_block_channels(cs);
    +
    + if (atomic_read(&cs->mstate) == MS_READY) {
    + atomic_set(&cs->mstate, MS_SHUTDOWN);
    + cs->at_state.pending_commands |= PC_SHUTDOWN;
    + atomic_set(&cs->commands_pending, 1);
    + gig_dbg(DEBUG_CMD, "Scheduling PC_SHUTDOWN");
    + } else
    + finish_shutdown(cs);
    +}
    +
    +static void do_stop(struct cardstate *cs)
    +{
    + do_shutdown(cs);
    +}
    +
    +/* Entering cid mode or getting a cid failed:
    + * try to initialize the device and try again.
    + *
    + * channel >= 0: getting cid for the channel failed
    + * channel < 0: entering cid mode failed
    + *
    + * returns 0 on failure
    + */
    +static int reinit_and_retry(struct cardstate *cs, int channel)
    +{
    + int i;
    +
    + if (--cs->retry_count <= 0)
    + return 0;
    +
    + for (i = 0; i < cs->channels; ++i)
    + if (cs->bcs[i].at_state.cid > 0)
    + return 0;
    +
    + if (channel < 0)
    + dev_warn(cs->dev,
    + "Could not enter cid mode. Reinit device and try again.\n");
    + else {
    + dev_warn(cs->dev,
    + "Could not get a call id. Reinit device and try again.\n");
    + cs->bcs[channel].at_state.pending_commands |= PC_CID;
    + }
    + schedule_init(cs, MS_INIT);
    + return 1;
    +}
    +
    +static int at_state_invalid(struct cardstate *cs,
    + struct at_state_t *test_ptr)
    +{
    + unsigned long flags;
    + unsigned channel;
    + struct at_state_t *at_state;
    + int retval = 0;
    +
    + spin_lock_irqsave(&cs->lock, flags);
    +
    + if (test_ptr == &cs->at_state)
    + goto exit;
    +
    + list_for_each_entry(at_state, &cs->temp_at_states, list)
    + if (at_state == test_ptr)
    + goto exit;
    +
    + for (channel = 0; channel < cs->channels; ++channel)
    + if (&cs->bcs[channel].at_state == test_ptr)
    + goto exit;
    +
    + retval = 1;
    +exit:
    + spin_unlock_irqrestore(&cs->lock, flags);
    + return retval;
    +}
    +
    +static void handle_icall(struct cardstate *cs, struct bc_state *bcs,
    + struct at_state_t **p_at_state)
    +{
    + int retval;
    + struct at_state_t *at_state = *p_at_state;
    +
    + retval = gigaset_isdn_icall(at_state);
    + switch (retval) {
    + case ICALL_ACCEPT:
    + break;
    + default:
    + dev_err(cs->dev, "internal error: disposition=%d\n", retval);
    + /* --v-- fall through --v-- */
    + case ICALL_IGNORE:
    + case ICALL_REJECT:
    + /* hang up actively
    + * Device doc says that would reject the call.
    + * In fact it doesn't.
    + */
    + at_state->pending_commands |= PC_HUP;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    + }
    +}
    +
    +static int do_lock(struct cardstate *cs)
    +{
    + int mode;
    + int i;
    +
    + switch (atomic_read(&cs->mstate)) {
    + case MS_UNINITIALIZED:
    + case MS_READY:
    + if (cs->cur_at_seq || !list_empty(&cs->temp_at_states) ||
    + cs->at_state.pending_commands)
    + return -EBUSY;
    +
    + for (i = 0; i < cs->channels; ++i)
    + if (cs->bcs[i].at_state.pending_commands)
    + return -EBUSY;
    +
    + if (!gigaset_get_channels(cs))
    + return -EBUSY;
    +
    + break;
    + case MS_LOCKED:
    + //retval = -EACCES;
    + break;
    + default:
    + return -EBUSY;
    + }
    +
    + mode = atomic_read(&cs->mode);
    + atomic_set(&cs->mstate, MS_LOCKED);
    + atomic_set(&cs->mode, M_UNKNOWN);
    +
    + return mode;
    +}
    +
    +static int do_unlock(struct cardstate *cs)
    +{
    + if (atomic_read(&cs->mstate) != MS_LOCKED)
    + return -EINVAL;
    +
    + atomic_set(&cs->mstate, MS_UNINITIALIZED);
    + atomic_set(&cs->mode, M_UNKNOWN);
    + gigaset_free_channels(cs);
    + if (atomic_read(&cs->connected))
    + schedule_init(cs, MS_INIT);
    +
    + return 0;
    +}
    +
    +static void do_action(int action, struct cardstate *cs,
    + struct bc_state *bcs,
    + struct at_state_t **p_at_state, char **pp_command,
    + int *p_genresp, int *p_resp_code,
    + struct event_t *ev)
    +{
    + struct at_state_t *at_state = *p_at_state;
    + struct at_state_t *at_state2;
    + unsigned long flags;
    +
    + int channel;
    +
    + unsigned char *s, *e;
    + int i;
    + unsigned long val;
    +
    + switch (action) {
    + case ACT_NOTHING:
    + break;
    + case ACT_TIMEOUT:
    + at_state->waiting = 1;
    + break;
    + case ACT_INIT:
    + cs->at_state.pending_commands &= ~PC_INIT;
    + cs->cur_at_seq = SEQ_NONE;
    + atomic_set(&cs->mode, M_UNIMODEM);
    + if (!atomic_read(&cs->cidmode)) {
    + gigaset_free_channels(cs);
    + atomic_set(&cs->mstate, MS_READY);
    + break;
    + }
    + cs->at_state.pending_commands |= PC_CIDMODE;
    + atomic_set(&cs->commands_pending, 1);
    + gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
    + break;
    + case ACT_FAILINIT:
    + dev_warn(cs->dev, "Could not initialize the device.\n");
    + cs->dle = 0;
    + init_failed(cs, M_UNKNOWN);
    + cs->cur_at_seq = SEQ_NONE;
    + break;
    + case ACT_CONFIGMODE:
    + init_failed(cs, M_CONFIG);
    + cs->cur_at_seq = SEQ_NONE;
    + break;
    + case ACT_SETDLE1:
    + cs->dle = 1;
    + /* cs->inbuf[0].inputstate |= INS_command | INS_DLE_command; */
    + cs->inbuf[0].inputstate &=
    + ~(INS_command | INS_DLE_command);
    + break;
    + case ACT_SETDLE0:
    + cs->dle = 0;
    + cs->inbuf[0].inputstate =
    + (cs->inbuf[0].inputstate & ~INS_DLE_command)
    + | INS_command;
    + break;
    + case ACT_CMODESET:
    + if (atomic_read(&cs->mstate) == MS_INIT ||
    + atomic_read(&cs->mstate) == MS_RECOVER) {
    + gigaset_free_channels(cs);
    + atomic_set(&cs->mstate, MS_READY);
    + }
    + atomic_set(&cs->mode, M_CID);
    + cs->cur_at_seq = SEQ_NONE;
    + break;
    + case ACT_UMODESET:
    + atomic_set(&cs->mode, M_UNIMODEM);
    + cs->cur_at_seq = SEQ_NONE;
    + break;
    + case ACT_FAILCMODE:
    + cs->cur_at_seq = SEQ_NONE;
    + if (atomic_read(&cs->mstate) == MS_INIT ||
    + atomic_read(&cs->mstate) == MS_RECOVER) {
    + init_failed(cs, M_UNKNOWN);
    + break;
    + }
    + if (!reinit_and_retry(cs, -1))
    + schedule_init(cs, MS_RECOVER);
    + break;
    + case ACT_FAILUMODE:
    + cs->cur_at_seq = SEQ_NONE;
    + schedule_init(cs, MS_RECOVER);
    + break;
    + case ACT_HUPMODEM:
    + /* send "+++" (hangup in unimodem mode) */
    + cs->ops->write_cmd(cs, "+++", 3, NULL);
    + break;
    + case ACT_RING:
    + /* get fresh AT state structure for new CID */
    + at_state2 = get_free_channel(cs, ev->parameter);
    + if (!at_state2) {
    + dev_warn(cs->dev,
    + "RING ignored: could not allocate channel structure\n");
    + break;
    + }
    +
    + /* initialize AT state structure
    + * note that bcs may be NULL if no B channel is free
    + */
    + at_state2->ConState = 700;
    + kfree(at_state2->str_var[STR_NMBR]);
    + at_state2->str_var[STR_NMBR] = NULL;
    + kfree(at_state2->str_var[STR_ZCPN]);
    + at_state2->str_var[STR_ZCPN] = NULL;
    + kfree(at_state2->str_var[STR_ZBC]);
    + at_state2->str_var[STR_ZBC] = NULL;
    + kfree(at_state2->str_var[STR_ZHLC]);
    + at_state2->str_var[STR_ZHLC] = NULL;
    + at_state2->int_var[VAR_ZCTP] = -1;
    +
    + spin_lock_irqsave(&cs->lock, flags);
    + at_state2->timer_expires = RING_TIMEOUT;
    + at_state2->timer_active = 1;
    + spin_unlock_irqrestore(&cs->lock, flags);
    + break;
    + case ACT_ICALL:
    + handle_icall(cs, bcs, p_at_state);
    + at_state = *p_at_state;
    + break;
    + case ACT_FAILSDOWN:
    + dev_warn(cs->dev, "Could not shut down the device.\n");
    + /* fall through */
    + case ACT_FAKESDOWN:
    + case ACT_SDOWN:
    + cs->cur_at_seq = SEQ_NONE;
    + finish_shutdown(cs);
    + break;
    + case ACT_CONNECT:
    + if (cs->onechannel) {
    + at_state->pending_commands |= PC_DLE1;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    + }
    + bcs->chstate |= CHS_D_UP;
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
    + cs->ops->init_bchannel(bcs);
    + break;
    + case ACT_DLE1:
    + cs->cur_at_seq = SEQ_NONE;
    + bcs = cs->bcs + cs->curchannel;
    +
    + bcs->chstate |= CHS_D_UP;
    + gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
    + cs->ops->init_bchannel(bcs);
    + break;
    + case ACT_FAKEHUP:
    + at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
    + /* fall through */
    + case ACT_DISCONNECT:
    + cs->cur_at_seq = SEQ_NONE;
    + at_state->cid = -1;
    + if (bcs && cs->onechannel && cs->dle) {
    + /* Check for other open channels not needed:
    + * DLE only used for M10x with one B channel.
    + */
    + at_state->pending_commands |= PC_DLE0;
    + atomic_set(&cs->commands_pending, 1);
    + } else {
    + disconnect(p_at_state);
    + at_state = *p_at_state;
    + }
    + break;
    + case ACT_FAKEDLE0:
    + at_state->int_var[VAR_ZDLE] = 0;
    + cs->dle = 0;
    + /* fall through */
    + case ACT_DLE0:
    + cs->cur_at_seq = SEQ_NONE;
    + at_state2 = &cs->bcs[cs->curchannel].at_state;
    + disconnect(&at_state2);
    + break;
    + case ACT_ABORTHUP:
    + cs->cur_at_seq = SEQ_NONE;
    + dev_warn(cs->dev, "Could not hang up.\n");
    + at_state->cid = -1;
    + if (bcs && cs->onechannel)
    + at_state->pending_commands |= PC_DLE0;
    + else {
    + disconnect(p_at_state);
    + at_state = *p_at_state;
    + }
    + schedule_init(cs, MS_RECOVER);
    + break;
    + case ACT_FAILDLE0:
    + cs->cur_at_seq = SEQ_NONE;
    + dev_warn(cs->dev, "Could not leave DLE mode.\n");
    + at_state2 = &cs->bcs[cs->curchannel].at_state;
    + disconnect(&at_state2);
    + schedule_init(cs, MS_RECOVER);
    + break;
    + case ACT_FAILDLE1:
    + cs->cur_at_seq = SEQ_NONE;
    + dev_warn(cs->dev,
    + "Could not enter DLE mode. Trying to hang up.\n");
    + channel = cs->curchannel;
    + cs->bcs[channel].at_state.pending_commands |= PC_HUP;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    +
    + case ACT_CID: /* got cid; start dialing */
    + cs->cur_at_seq = SEQ_NONE;
    + channel = cs->curchannel;
    + if (ev->parameter > 0 && ev->parameter <= 65535) {
    + cs->bcs[channel].at_state.cid = ev->parameter;
    + cs->bcs[channel].at_state.pending_commands |=
    + PC_DIAL;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    + }
    + /* fall through */
    + case ACT_FAILCID:
    + cs->cur_at_seq = SEQ_NONE;
    + channel = cs->curchannel;
    + if (!reinit_and_retry(cs, channel)) {
    + dev_warn(cs->dev,
    + "Could not get a call ID. Cannot dial.\n");
    + at_state2 = &cs->bcs[channel].at_state;
    + disconnect(&at_state2);
    + }
    + break;
    + case ACT_ABORTCID:
    + cs->cur_at_seq = SEQ_NONE;
    + at_state2 = &cs->bcs[cs->curchannel].at_state;
    + disconnect(&at_state2);
    + break;
    +
    + case ACT_DIALING:
    + case ACT_ACCEPTED:
    + cs->cur_at_seq = SEQ_NONE;
    + break;
    +
    + case ACT_ABORTACCEPT: /* hangup/error/timeout during ICALL processing */
    + disconnect(p_at_state);
    + at_state = *p_at_state;
    + break;
    +
    + case ACT_ABORTDIAL: /* error/timeout during dial preparation */
    + cs->cur_at_seq = SEQ_NONE;
    + at_state->pending_commands |= PC_HUP;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    +
    + case ACT_REMOTEREJECT: /* DISCONNECT_IND after dialling */
    + case ACT_CONNTIMEOUT: /* timeout waiting for ZSAU=ACTIVE */
    + case ACT_REMOTEHUP: /* DISCONNECT_IND with established connection */
    + at_state->pending_commands |= PC_HUP;
    + atomic_set(&cs->commands_pending, 1);
    + break;
    + case ACT_GETSTRING: /* warning: RING, ZDLE, ...
    + are not handled properly anymore */
    + at_state->getstring = 1;
    + break;
    + case ACT_SETVER:
    + if (!ev->ptr) {
    + *p_genresp = 1;
    + *p_resp_code = RSP_ERROR;
    + break;
    + }
    + s = ev->ptr;
    +
    + if (!strcmp(s, "OK")) {
    + *p_genresp = 1;
    + *p_resp_code = RSP_ERROR;
    + break;
    + }
    +
    + for (i = 0; i < 4; ++i) {
    + val = simple_strtoul(s, (char **) &e, 10);
    + if (val > INT_MAX || e == s)
    + break;
    + if (i == 3) {
    + if (*e)
    + break;
    + } else if (*e != '.')
    + break;
    + else
    + s = e + 1;
    + cs->fwver[i] = val;
    + }
    + if (i != 4) {
    + *p_genresp = 1;
    + *p_resp_code = RSP_ERROR;
    + break;
    + }
    + /*at_state->getstring = 1;*/
    + cs->gotfwver = 0;
    + break;
    + case ACT_GOTVER:
    + if (cs->gotfwver == 0) {
    + cs->gotfwver = 1;
    + gig_dbg(DEBUG_ANY,
    + "firmware version %02d.%03d.%02d.%02d",
    + cs->fwver[0], cs->fwver[1],
    + cs->fwver[2], cs->fwver[3]);
    + break;
    + }
    + /* fall through */
    + case ACT_FAILVER:
    + cs->gotfwver = -1;
    + dev_err(cs->dev, "could not read firmware version.\n");
    + break;
    +#ifdef CONFIG_GIGASET_DEBUG
    + case ACT_ERROR:
    + *p_genresp = 1;
    + *p_resp_code = RSP_ERROR;
    + break;
    + case ACT_TEST:
    + {
    + static int count = 3; //2; //1;
    + *p_genresp = 1;
    + *p_resp_code = count ? RSP_ERROR : RSP_OK;
    + if (count > 0)
    + --count;
    + }
    + break;
    +#endif
    + case ACT_DEBUG:
    + gig_dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
    + __func__, ev->type, at_state->ConState);
    + break;
    + case ACT_WARN:
    + dev_warn(cs->dev, "%s: resp_code %d in ConState %d!\n",
    + __func__, ev->type, at_state->ConState);
    + break;
    + case ACT_ZCAU:
    + dev_warn(cs->dev, "cause code %04x in connection state %d.\n",
    + ev->parameter, at_state->ConState);
    + break;
    +
    + /* events from the LL */
    + case ACT_DIAL:
    + start_dial(at_state, ev->ptr, ev->parameter);
    + break;
    + case ACT_ACCEPT:
    + start_accept(at_state);
    + break;
    + case ACT_PROTO_L2:
    + gig_dbg(DEBUG_CMD, "set protocol to %u",
    + (unsigned) ev->parameter);
    + at_state->bcs->proto2 = ev->parameter;
    + break;
    + case ACT_HUP:
    + at_state->pending_commands |= PC_HUP;
    + atomic_set(&cs->commands_pending, 1);
    + gig_dbg(DEBUG_CMD, "Scheduling PC_HUP");
    + break;
    +
    + /* hotplug events */
    + case ACT_STOP:
    + do_stop(cs);
    + break;
    + case ACT_START:
    + do_start(cs);
    + break;
    +
    + /* events from the interface */ // FIXME without ACT_xxxx?
    + case ACT_IF_LOCK:
    + cs->cmd_result = ev->parameter ? do_lock(cs) : do_unlock(cs);
    + cs->waiting = 0;
    + wake_up(&cs->waitqueue);
    + break;
    + case ACT_IF_VER:
    + if (ev->parameter != 0)
    + cs->cmd_result = -EINVAL;
    + else if (cs->gotfwver != 1) {
    + cs->cmd_result = -ENOENT;
    + } else {
    + memcpy(ev->arg, cs->fwver, sizeof cs->fwver);
    + cs->cmd_result = 0;
    + }
    + cs->waiting = 0;
    + wake_up(&cs->waitqueue);
    + break;
    +
    + /* events from the proc file system */ // FIXME without ACT_xxxx?
    + case ACT_PROC_CIDMODE:
    + if (ev->parameter != atomic_read(&cs->cidmode)) {
    + atomic_set(&cs->cidmode, ev->parameter);
    + if (ev->parameter) {
    + cs->at_state.pending_commands |= PC_CIDMODE;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
    + } else {
    + cs->at_state.pending_commands |= PC_UMMODE;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_UMMODE");
    + }
    + atomic_set(&cs->commands_pending, 1);
    + }
    + cs->waiting = 0;
    + wake_up(&cs->waitqueue);
    + break;
    +
    + /* events from the hardware drivers */
    + case ACT_NOTIFY_BC_DOWN:
    + bchannel_down(bcs);
    + break;
    + case ACT_NOTIFY_BC_UP:
    + bchannel_up(bcs);
    + break;
    + case ACT_SHUTDOWN:
    + do_shutdown(cs);
    + break;
    +
    +
    + default:
    + if (action >= ACT_CMD && action < ACT_CMD + AT_NUM) {
    + *pp_command = at_state->bcs->commands[action - ACT_CMD];
    + if (!*pp_command) {
    + *p_genresp = 1;
    + *p_resp_code = RSP_NULL;
    + }
    + } else
    + dev_err(cs->dev, "%s: action==%d!\n", __func__, action);
    + }
    +}
    +
    +/* State machine to do the calling and hangup procedure */
    +static void process_event(struct cardstate *cs, struct event_t *ev)
    +{
    + struct bc_state *bcs;
    + char *p_command = NULL;
    + struct reply_t *rep;
    + int rcode;
    + int genresp = 0;
    + int resp_code = RSP_ERROR;
    + int sendcid;
    + struct at_state_t *at_state;
    + int index;
    + int curact;
    + unsigned long flags;
    +
    + IFNULLRET(cs);
    + IFNULLRET(ev);
    +
    + if (ev->cid >= 0) {
    + at_state = at_state_from_cid(cs, ev->cid);
    + if (!at_state) {
    + gigaset_add_event(cs, &cs->at_state, RSP_WRONG_CID,
    + NULL, 0, NULL);
    + return;
    + }
    + } else {
    + at_state = ev->at_state;
    + if (at_state_invalid(cs, at_state)) {
    + gig_dbg(DEBUG_ANY, "event for invalid at_state %p",
    + at_state);
    + return;
    + }
    + }
    +
    + gig_dbg(DEBUG_CMD, "connection state %d, event %d",
    + at_state->ConState, ev->type);
    +
    + bcs = at_state->bcs;
    + sendcid = at_state->cid;
    +
    + /* Setting the pointer to the dial array */
    + rep = at_state->replystruct;
    + IFNULLRET(rep);
    +
    + if (ev->type == EV_TIMEOUT) {
    + if (ev->parameter != atomic_read(&at_state->timer_index)
    + || !at_state->timer_active) {
    + ev->type = RSP_NONE; /* old timeout */
    + gig_dbg(DEBUG_ANY, "old timeout");
    + } else if (!at_state->waiting)
    + gig_dbg(DEBUG_ANY, "timeout occurred");
    + else
    + gig_dbg(DEBUG_ANY, "stopped waiting");
    + }
    +
    + /* if the response belongs to a variable in at_state->int_var[VAR_XXXX]
    + or at_state->str_var[STR_XXXX], set it */
    + if (ev->type >= RSP_VAR && ev->type < RSP_VAR + VAR_NUM) {
    + index = ev->type - RSP_VAR;
    + at_state->int_var[index] = ev->parameter;
    + } else if (ev->type >= RSP_STR && ev->type < RSP_STR + STR_NUM) {
    + index = ev->type - RSP_STR;
    + kfree(at_state->str_var[index]);
    + at_state->str_var[index] = ev->ptr;
    + ev->ptr = NULL; /* prevent process_events() from
    + deallocating ptr */
    + }
    +
    + if (ev->type == EV_TIMEOUT || ev->type == RSP_STRING)
    + at_state->getstring = 0;
    +
    + /* Search row in dial array which matches modem response and current
    + constate */
    + for (;; rep++) {
    + rcode = rep->resp_code;
    + if (rcode == RSP_LAST) {
    + /* found nothing...*/
    + dev_warn(cs->dev, "%s: rcode=RSP_LAST: "
    + "resp_code %d in ConState %d!\n",
    + __func__, ev->type, at_state->ConState);
    + return;
    + }
    + if ((rcode == RSP_ANY || rcode == ev->type)
    + && ((int) at_state->ConState >= rep->min_ConState)
    + && (rep->max_ConState < 0
    + || (int) at_state->ConState <= rep->max_ConState)
    + && (rep->parameter < 0 || rep->parameter == ev->parameter))
    + break;
    + }
    +
    + p_command = rep->command;
    +
    + at_state->waiting = 0;
    + for (curact = 0; curact < MAXACT; ++curact) {
    + /* The row tells us what we should do ..
    + */
    + do_action(rep->action[curact], cs, bcs, &at_state, &p_command, &genresp, &resp_code, ev);
    + if (!at_state)
    + break; /* may be freed after disconnect */
    + }
    +
    + if (at_state) {
    + /* Jump to the next con-state regarding the array */
    + if (rep->new_ConState >= 0)
    + at_state->ConState = rep->new_ConState;
    +
    + if (genresp) {
    + spin_lock_irqsave(&cs->lock, flags);
    + at_state->timer_expires = 0; //FIXME
    + at_state->timer_active = 0; //FIXME
    + spin_unlock_irqrestore(&cs->lock, flags);
    + gigaset_add_event(cs, at_state, resp_code, NULL, 0, NULL);
    + } else {
    + /* Send command to modem if not NULL... */
    + if (p_command/*rep->command*/) {
    + if (atomic_read(&cs->connected))
    + send_command(cs, p_command,
    + sendcid, cs->dle,
    + GFP_ATOMIC);
    + else
    + gigaset_add_event(cs, at_state,
    + RSP_NODEV,
    + NULL, 0, NULL);
    + }
    +
    + spin_lock_irqsave(&cs->lock, flags);
    + if (!rep->timeout) {
    + at_state->timer_expires = 0;
    + at_state->timer_active = 0;
    + } else if (rep->timeout > 0) { /* new timeout */
    + at_state->timer_expires = rep->timeout * 10;
    + at_state->timer_active = 1;
    + new_index(&at_state->timer_index,
    + MAX_TIMER_INDEX);
    + }
    + spin_unlock_irqrestore(&cs->lock, flags);
    + }
    + }
    +}
    +
    +static void schedule_sequence(struct cardstate *cs,
    + struct at_state_t *at_state, int sequence)
    +{
    + cs->cur_at_seq = sequence;
    + gigaset_add_event(cs, at_state, RSP_INIT, NULL, sequence, NULL);
    +}
    +
    +static void process_command_flags(struct cardstate *cs)
    +{
    + struct at_state_t *at_state = NULL;
    + struct bc_state *bcs;
    + int i;
    + int sequence;
    +
    + IFNULLRET(cs);
    +
    + atomic_set(&cs->commands_pending, 0);
    +
    + if (cs->cur_at_seq) {
    + gig_dbg(DEBUG_CMD, "not searching scheduled commands: busy");
    + return;
    + }
    +
    + gig_dbg(DEBUG_CMD, "searching scheduled commands");
    +
    + sequence = SEQ_NONE;
    +
    + /* clear pending_commands and hangup channels on shutdown */
    + if (cs->at_state.pending_commands & PC_SHUTDOWN) {
    + cs->at_state.pending_commands &= ~PC_CIDMODE;
    + for (i = 0; i < cs->channels; ++i) {
    + bcs = cs->bcs + i;
    + at_state = &bcs->at_state;
    + at_state->pending_commands &=
    + ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
    + if (at_state->cid > 0)
    + at_state->pending_commands |= PC_HUP;
    + if (at_state->pending_commands & PC_CID) {
    + at_state->pending_commands |= PC_NOCID;
    + at_state->pending_commands &= ~PC_CID;
    + }
    + }
    + }
    +
    + /* clear pending_commands and hangup channels on reset */
    + if (cs->at_state.pending_commands & PC_INIT) {
    + cs->at_state.pending_commands &= ~PC_CIDMODE;
    + for (i = 0; i < cs->channels; ++i) {
    + bcs = cs->bcs + i;
    + at_state = &bcs->at_state;
    + at_state->pending_commands &=
    + ~(PC_DLE1 | PC_ACCEPT | PC_DIAL);
    + if (at_state->cid > 0)
    + at_state->pending_commands |= PC_HUP;
    + if (atomic_read(&cs->mstate) == MS_RECOVER) {
    + if (at_state->pending_commands & PC_CID) {
    + at_state->pending_commands |= PC_NOCID;
    + at_state->pending_commands &= ~PC_CID;
    + }
    + }
    + }
    + }
    +
    + /* only switch back to unimodem mode, if no commands are pending and no channels are up */
    + if (cs->at_state.pending_commands == PC_UMMODE
    + && !atomic_read(&cs->cidmode)
    + && list_empty(&cs->temp_at_states)
    + && atomic_read(&cs->mode) == M_CID) {
    + sequence = SEQ_UMMODE;
    + at_state = &cs->at_state;
    + for (i = 0; i < cs->channels; ++i) {
    + bcs = cs->bcs + i;
    + if (bcs->at_state.pending_commands ||
    + bcs->at_state.cid > 0) {
    + sequence = SEQ_NONE;
    + break;
    + }
    + }
    + }
    + cs->at_state.pending_commands &= ~PC_UMMODE;
    + if (sequence != SEQ_NONE) {
    + schedule_sequence(cs, at_state, sequence);
    + return;
    + }
    +
    + for (i = 0; i < cs->channels; ++i) {
    + bcs = cs->bcs + i;
    + if (bcs->at_state.pending_commands & PC_HUP) {
    + bcs->at_state.pending_commands &= ~PC_HUP;
    + if (bcs->at_state.pending_commands & PC_CID) {
    + /* not yet dialing: PC_NOCID is sufficient */
    + bcs->at_state.pending_commands |= PC_NOCID;
    + bcs->at_state.pending_commands &= ~PC_CID;
    + } else {
    + schedule_sequence(cs, &bcs->at_state, SEQ_HUP);
    + return;
    + }
    + }
    + if (bcs->at_state.pending_commands & PC_NOCID) {
    + bcs->at_state.pending_commands &= ~PC_NOCID;
    + cs->curchannel = bcs->channel;
    + schedule_sequence(cs, &cs->at_state, SEQ_NOCID);
    + return;
    + } else if (bcs->at_state.pending_commands & PC_DLE0) {
    + bcs->at_state.pending_commands &= ~PC_DLE0;
    + cs->curchannel = bcs->channel;
    + schedule_sequence(cs, &cs->at_state, SEQ_DLE0);
    + return;
    + }
    + }
    +
    + list_for_each_entry(at_state, &cs->temp_at_states, list)
    + if (at_state->pending_commands & PC_HUP) {
    + at_state->pending_commands &= ~PC_HUP;
    + schedule_sequence(cs, at_state, SEQ_HUP);
    + return;
    + }
    +
    + if (cs->at_state.pending_commands & PC_INIT) {
    + cs->at_state.pending_commands &= ~PC_INIT;
    + cs->dle = 0; //FIXME
    + cs->inbuf->inputstate = INS_command;
    + //FIXME reset card state (or -> LOCK0)?
    + schedule_sequence(cs, &cs->at_state, SEQ_INIT);
    + return;
    + }
    + if (cs->at_state.pending_commands & PC_SHUTDOWN) {
    + cs->at_state.pending_commands &= ~PC_SHUTDOWN;
    + schedule_sequence(cs, &cs->at_state, SEQ_SHUTDOWN);
    + return;
    + }
    + if (cs->at_state.pending_commands & PC_CIDMODE) {
    + cs->at_state.pending_commands &= ~PC_CIDMODE;
    + if (atomic_read(&cs->mode) == M_UNIMODEM) {
    + cs->retry_count = 1;
    + schedule_sequence(cs, &cs->at_state, SEQ_CIDMODE);
    + return;
    + }
    + }
    +
    + for (i = 0; i < cs->channels; ++i) {
    + bcs = cs->bcs + i;
    + if (bcs->at_state.pending_commands & PC_DLE1) {
    + bcs->at_state.pending_commands &= ~PC_DLE1;
    + cs->curchannel = bcs->channel;
    + schedule_sequence(cs, &cs->at_state, SEQ_DLE1);
    + return;
    + }
    + if (bcs->at_state.pending_commands & PC_ACCEPT) {
    + bcs->at_state.pending_commands &= ~PC_ACCEPT;
    + schedule_sequence(cs, &bcs->at_state, SEQ_ACCEPT);
    + return;
    + }
    + if (bcs->at_state.pending_commands & PC_DIAL) {
    + bcs->at_state.pending_commands &= ~PC_DIAL;
    + schedule_sequence(cs, &bcs->at_state, SEQ_DIAL);
    + return;
    + }
    + if (bcs->at_state.pending_commands & PC_CID) {
    + switch (atomic_read(&cs->mode)) {
    + case M_UNIMODEM:
    + cs->at_state.pending_commands |= PC_CIDMODE;
    + gig_dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
    + atomic_set(&cs->commands_pending, 1);
    + return;
    +#ifdef GIG_MAYINITONDIAL
    + case M_UNKNOWN:
    + schedule_init(cs, MS_INIT);
    + return;
    +#endif
    + }
    + bcs->at_state.pending_commands &= ~PC_CID;
    + cs->curchannel = bcs->channel;
    +#ifdef GIG_RETRYCID
    + cs->retry_count = 2;
    +#else
    + cs->retry_count = 1;
    +#endif
    + schedule_sequence(cs, &cs->at_state, SEQ_CID);
    + return;
    + }
    + }
    +}
    +
    +static void process_events(struct cardstate *cs)
    +{
    + struct event_t *ev;
    + unsigned head, tail;
    + int i;
    + int check_flags = 0;
    + int was_busy;
    +
    + /* no locking needed (only one reader) */
    + head = atomic_read(&cs->ev_head);
    +
    + for (i = 0; i < 2 * MAX_EVENTS; ++i) {
    + tail = atomic_read(&cs->ev_tail);
    + if (tail == head) {
    + if (!check_flags && !atomic_read(&cs->commands_pending))
    + break;
    + check_flags = 0;
    + process_command_flags(cs);
    + tail = atomic_read(&cs->ev_tail);
    + if (tail == head) {
    + if (!atomic_read(&cs->commands_pending))
    + break;
    + continue;
    + }
    + }
    +
    + ev = cs->events + head;
    + was_busy = cs->cur_at_seq != SEQ_NONE;
    + process_event(cs, ev);
    + kfree(ev->ptr);
    + ev->ptr = NULL;
    + if (was_busy && cs->cur_at_seq == SEQ_NONE)
    + check_flags = 1;
    +
    + head = (head + 1) % MAX_EVENTS;
    + atomic_set(&cs->ev_head, head);
    + }
    +
    + if (i == 2 * MAX_EVENTS) {
    + dev_err(cs->dev,
    + "infinite loop in process_events; aborting.\n");
    + }
    +}
    +
    +/* tasklet scheduled on any event received from the Gigaset device
    + * parameter:
    + * data ISDN controller state structure
    + */
    +void gigaset_handle_event(unsigned long data)
    +{
    + struct cardstate *cs = (struct cardstate *) data;
    +
    + IFNULLRET(cs);
    + IFNULLRET(cs->inbuf);
    +
    + /* handle incoming data on control/common channel */
    + if (atomic_read(&cs->inbuf->head) != atomic_read(&cs->inbuf->tail)) {
    + gig_dbg(DEBUG_INTR, "processing new data");
    + cs->ops->handle_input(cs->inbuf);
    + }
    +
    + process_events(cs);
    +}
    -
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