]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[PATCH] isdn4linux: Siemens Gigaset drivers - event layer
authorHansjoerg Lipp <hjlipp@web.de>
Sun, 26 Mar 2006 09:38:30 +0000 (01:38 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sun, 26 Mar 2006 16:57:05 +0000 (08:57 -0800)
And: Tilman Schmidt <tilman@imap.cc>

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>
Cc: Karsten Keil <kkeil@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/isdn/gigaset/ev-layer.c [new file with mode: 0644]

diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
new file mode 100644 (file)
index 0000000..fdcb80b
--- /dev/null
@@ -0,0 +1,1983 @@
+/*
+ * 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.
+ * =====================================================================
+ * ToDo: ...
+ * =====================================================================
+ * Version: $Id: ev-layer.c,v 1.4.2.18 2006/02/04 18:28:16 hjlipp Exp $
+ * =====================================================================
+ */
+
+#include "gigaset.h"
+
+/* ========================================================== */
+/* bit masks for pending commands */
+#define PC_INIT       0x004
+#define PC_DLE0       0x008
+#define PC_DLE1       0x010
+#define PC_CID        0x080
+#define PC_NOCID      0x100
+#define PC_HUP        0x002
+#define PC_DIAL       0x001
+#define PC_ACCEPT     0x040
+#define PC_SHUTDOWN   0x020
+#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 aenderungen uebernehmen
+{
+       /* 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 aenderungen uebernehmen
+{
+       /* 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);
+
+       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);
+
+       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) */
+               dbg(DEBUG_MCMD, "skipped EOL [%02X]", cs->respdata[len]);
+               return;
+       }
+       cs->respdata[len] = 0;
+       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) {
+                                       warn("too many parameters in response");
+                                       /* 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;
+
+               dbg(DEBUG_TRANSCMD, "CMD received: %s", argv[0]);
+               if (cid) {
+                       --params;
+                       dbg(DEBUG_TRANSCMD, "CID: %s", argv[params]);
+               }
+               dbg(DEBUG_TRANSCMD, "available params: %d", params - 1);
+               for (j = 1; j < params; j++)
+                       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)) {
+                       err("event queue full");
+                       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;
+                               warn("unknown modem response: %s",
+                                    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) {
+                               err("received RING without CID!");
+                               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;
+                               warn("%s: unknown parameter %s after ZSAU",
+                                    __func__, argv[curarg]);
+                       }
+                       ++curarg;
+                       break;
+               case RT_STRING:
+                       if (curarg < params) {
+                               len = strlen(argv[curarg]) + 1;
+                               event->ptr = kmalloc(len, GFP_ATOMIC);
+                               if (event->ptr)
+                                       memcpy(event->ptr, argv[curarg], len);
+                               else
+                                       err("no memory for string!");
+                               ++curarg;
+                       }
+#ifdef CONFIG_GIGASET_DEBUG
+                       if (!event->ptr)
+                               dbg(DEBUG_CMD, "string==NULL");
+                       else
+                               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
+                       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)
+               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
+               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) {
+               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);
+       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 (likely(buflen > cmdlen)) {
+               cmdbuf = kmalloc(buflen, kmallocflags);
+               if (likely(cmdbuf != NULL)) {
+                       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);
+               } else
+                       err("no memory for command buffer");
+       } else
+               err("overflow in buflen");
+}
+
+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)) {
+               notice("%s: D channel not up", __func__);
+               bcs->chstate |= CHS_D_UP;
+               gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
+       }
+
+       if (bcs->chstate & CHS_B_UP) {
+               notice("%s: B channel already up", __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;
+       dbg(DEBUG_CMD, "Scheduling PC_CID");
+//#ifdef GIG_MAYINITONDIAL
+//     if (atomic_read(&cs->MState) == MS_UNKNOWN) {
+//             cs->at_state.pending_commands |= PC_INIT;
+//             dbg(DEBUG_CMD, "Scheduling PC_INIT");
+//     }
+//#endif
+       atomic_set(&cs->commands_pending, 1); //FIXME
+       return;
+
+error:
+       at_state->pending_commands |= PC_NOCID;
+       dbg(DEBUG_CMD, "Scheduling PC_NOCID");
+       atomic_set(&cs->commands_pending, 1); //FIXME
+       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;
+               dbg(DEBUG_CMD, "Scheduling PC_ACCEPT");
+               atomic_set(&cs->commands_pending, 1); //FIXME
+       } else {
+               //FIXME
+               at_state->pending_commands |= PC_HUP;
+               dbg(DEBUG_CMD, "Scheduling PC_HUP");
+               atomic_set(&cs->commands_pending, 1); //FIXME
+       }
+}
+
+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); //FIXME
+               dbg(DEBUG_CMD, "Scheduling PC_SHUTDOWN"); //FIXME
+               //gigaset_schedule_event(cs); //FIXME
+       } 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)
+               warn("Could not enter cid mode. Reinit device and try again.");
+       else {
+               warn("Could not get a call id. Reinit device and try again.");
+               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:
+               err("internal error: disposition=%d", 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);
+       //FIXME reset card state / at states / bcs states
+
+       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);
+       //FIXME reset card state / at states / bcs states
+       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:
+               //FIXME setup everything
+               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); //FIXME
+               dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
+               break;
+       case ACT_FAILINIT:
+               warn("Could not initialize the device.");
+               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) {
+                       warn("RING ignored: "
+                            "could not allocate channel structure");
+                       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:
+               warn("Could not shut down the device.");
+               /* 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;
+               warn("Could not hang up.");
+               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;
+               warn("Could not leave DLE mode.");
+               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;
+               warn("Could not enter DLE mode. Try to hang up.");
+               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)) {
+                       warn("Could not get a call id. Dialing not possible");
+                       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 any more */
+               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;
+                       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;
+               err("could not read firmware version.");
+               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:
+               dbg(DEBUG_ANY, "%s: resp_code %d in ConState %d",
+                       __func__, ev->type, at_state->ConState);
+               break;
+       case ACT_WARN:
+               warn("%s: resp_code %d in ConState %d!",
+                       __func__, ev->type, at_state->ConState);
+               break;
+       case ACT_ZCAU:
+               warn("cause code %04x in connection state %d.",
+                    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:
+               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); //FIXME
+               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;
+                               dbg(DEBUG_CMD, "Scheduling PC_CIDMODE");
+                       } else {
+                               cs->at_state.pending_commands |= PC_UMMODE;
+                               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
+                       err("%s: action==%d!", __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)) {
+                       dbg(DEBUG_ANY,
+                           "event for invalid at_state %p", at_state);
+                       return;
+               }
+       }
+
+       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 */
+                       dbg(DEBUG_ANY, "old timeout");
+               } else if (!at_state->waiting)
+                       dbg(DEBUG_ANY, "timeout occured");
+               else
+                       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;
+               /* dbg (DEBUG_ANY, "rcode %d", rcode); */
+               if (rcode == RSP_LAST) {
+                       /* found nothing...*/
+                       warn("%s: rcode=RSP_LAST: resp_code %d in ConState %d!",
+                               __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) {
+               dbg(DEBUG_CMD, "not searching scheduled commands: busy");
+               return;
+       }
+
+       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) {
+#if 0
+                       cs->retry_count = 2;
+#else
+                       cs->retry_count = 1;
+#endif
+                       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;
+                               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) {
+               err("infinite loop in process_events; aborting.");
+       }
+}
+
+/* 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)) {
+               dbg(DEBUG_INTR, "processing new data");
+               cs->ops->handle_input(cs->inbuf);
+       }
+
+       process_events(cs);
+}