isdn: gigaset: remove i4l support
authorArnd Bergmann <arnd@arndb.de>
Thu, 18 Apr 2019 20:45:09 +0000 (22:45 +0200)
committerArnd Bergmann <arnd@arndb.de>
Fri, 31 May 2019 09:12:04 +0000 (11:12 +0200)
isdn4linux is getting removed, and the gigaset driver can still
use the CAPI support, so this can all go away.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Documentation/isdn/README.gigaset
drivers/isdn/gigaset/Kconfig
drivers/isdn/gigaset/Makefile
drivers/isdn/gigaset/i4l.c [deleted file]

index 9b1ce27..f6184b6 100644 (file)
@@ -48,9 +48,8 @@ GigaSet 307x Device Driver
 
 1.2. Software
      --------
-     The driver works with the Kernel CAPI subsystem as well as the old
-     ISDN4Linux subsystem, so it can be used with any software which is able
-     to use CAPI 2.0 or ISDN4Linux for ISDN connections (voice or data).
+     The driver works with the Kernel CAPI subsystem and can be used with any
+     software which is able to use CAPI 2.0 for ISDN connections (voice or data).
 
      There are some user space tools available at
      https://sourceforge.net/projects/gigaset307x/
@@ -92,7 +91,7 @@ GigaSet 307x Device Driver
        gigaset         debug      debug level (see section 3.2.)
 
                        startmode  initial operation mode (see section 2.5.):
-       bas_gigaset )              1=ISDN4linux/CAPI (default), 0=Unimodem
+       bas_gigaset )              1=CAPI (default), 0=Unimodem
        ser_gigaset )
        usb_gigaset )   cidmode    initial Call-ID mode setting (see section
                                   2.5.): 1=on (default), 0=off
@@ -154,18 +153,10 @@ GigaSet 307x Device Driver
 
 2.3. CAPI
      ----
-     If the driver is compiled with CAPI support (kernel configuration option
-     GIGASET_CAPI) the devices will show up as CAPI controllers as soon as the
-     corresponding driver module is loaded, and can then be used with CAPI 2.0
-     kernel and user space applications. For user space access, the module
-     capi.ko must be loaded.
-
-     Legacy ISDN4Linux applications are supported via the capidrv
-     compatibility driver. The kernel module capidrv.ko must be loaded
-     explicitly with the command
-        modprobe capidrv
-     if needed, and cannot be unloaded again without unloading the driver
-     first. (These are limitations of capidrv.)
+     The devices will show up as CAPI controllers as soon as the
+     corresponding driver module is loaded, and can then be used with
+     CAPI 2.0 kernel and user space applications. For user space access,
+     the module capi.ko must be loaded.
 
      Most distributions handle loading and unloading of the various CAPI
      modules automatically via the command capiinit(1) from the capi4k-utils
@@ -173,16 +164,6 @@ GigaSet 307x Device Driver
      Gigaset drivers because it doesn't support more than one module per
      driver.
 
-2.4. ISDN4Linux
-     ----------
-     If the driver is compiled without CAPI support (native ISDN4Linux
-     variant), it registers the device with the legacy ISDN4Linux subsystem
-     after loading the module. It can then be used with ISDN4Linux
-     applications only. Most distributions provide some configuration utility
-     for setting up that subsystem. Otherwise you can use some HOWTOs like
-         http://www.linuxhaven.de/dlhp/HOWTO/DE-ISDN-HOWTO-5.html
-
-
 2.5. Unimodem mode
      -------------
      In this mode the device works like a modem connected to a serial port
@@ -281,8 +262,7 @@ GigaSet 307x Device Driver
      number. Dialing "***" (three asterisks) calls all extensions
      simultaneously (global call).
 
-     This holds for both CAPI 2.0 and ISDN4Linux applications. Unimodem mode
-     does not support internal calls.
+     Unimodem mode does not support internal calls.
 
 2.8. Unregistered Wireless Devices (M101/M105)
      -----------------------------------------
index fe41e9c..c593105 100644 (file)
@@ -30,15 +30,6 @@ config GIGASET_CAPI
          Say N to build the old native ISDN4Linux variant.
          If unsure, say Y.
 
-config GIGASET_I4L
-       bool
-       depends on ISDN_I4L='y'||(ISDN_I4L='m'&&ISDN_DRV_GIGASET='m')
-       default !GIGASET_CAPI
-
-config GIGASET_DUMMYLL
-       bool
-       default !GIGASET_CAPI&&!GIGASET_I4L
-
 config GIGASET_BASE
        tristate "Gigaset base station support"
        depends on USB
index ac45a27..9c01089 100644 (file)
@@ -1,8 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0
 gigaset-y := common.o interface.o proc.o ev-layer.o asyncdata.o
-gigaset-$(CONFIG_GIGASET_CAPI) += capi.o
-gigaset-$(CONFIG_GIGASET_I4L) += i4l.o
-gigaset-$(CONFIG_GIGASET_DUMMYLL) += dummyll.o
+
+ifdef CONFIG_GIGASET_CAPI
+gigaset-y += capi.o
+else
+gigaset-y += dummyll.o
+endif
+
 usb_gigaset-y := usb-gigaset.o
 ser_gigaset-y := ser-gigaset.o
 bas_gigaset-y := bas-gigaset.o isocdata.o
diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c
deleted file mode 100644 (file)
index b5b389e..0000000
+++ /dev/null
@@ -1,695 +0,0 @@
-/*
- * Stuff used by all variants of the driver
- *
- * Copyright (c) 2001 by Stefan Eilers,
- *                       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"
-#include <linux/isdnif.h>
-#include <linux/export.h>
-
-#define SBUFSIZE       4096    /* sk_buff payload size */
-#define TRANSBUFSIZE   768     /* bytes per skb for transparent receive */
-#define HW_HDR_LEN     2       /* Header size used to store ack info */
-#define MAX_BUF_SIZE   (SBUFSIZE - HW_HDR_LEN) /* max data packet from LL */
-
-/* == Handling of I4L IO =====================================================*/
-
-/* writebuf_from_LL
- * called by LL to transmit data on an open channel
- * inserts the buffer data into the send queue and starts the transmission
- * Note that this operation must not sleep!
- * When the buffer is processed completely, gigaset_skb_sent() should be called.
- * parameters:
- *     driverID        driver ID as assigned by LL
- *     channel         channel number
- *     ack             if != 0 LL wants to be notified on completion via
- *                     statcallb(ISDN_STAT_BSENT)
- *     skb             skb containing data to send
- * return value:
- *     number of accepted bytes
- *     0 if temporarily unable to accept data (out of buffer space)
- *     <0 on error (eg. -EINVAL)
- */
-static int writebuf_from_LL(int driverID, int channel, int ack,
-                           struct sk_buff *skb)
-{
-       struct cardstate *cs = gigaset_get_cs_by_id(driverID);
-       struct bc_state *bcs;
-       unsigned char *ack_header;
-       unsigned len;
-
-       if (!cs) {
-               pr_err("%s: invalid driver ID (%d)\n", __func__, driverID);
-               return -ENODEV;
-       }
-       if (channel < 0 || channel >= cs->channels) {
-               dev_err(cs->dev, "%s: invalid channel ID (%d)\n",
-                       __func__, channel);
-               return -ENODEV;
-       }
-       bcs = &cs->bcs[channel];
-
-       /* can only handle linear sk_buffs */
-       if (skb_linearize(skb) < 0) {
-               dev_err(cs->dev, "%s: skb_linearize failed\n", __func__);
-               return -ENOMEM;
-       }
-       len = skb->len;
-
-       gig_dbg(DEBUG_LLDATA,
-               "Receiving data from LL (id: %d, ch: %d, ack: %d, sz: %d)",
-               driverID, channel, ack, len);
-
-       if (!len) {
-               if (ack)
-                       dev_notice(cs->dev, "%s: not ACKing empty packet\n",
-                                  __func__);
-               return 0;
-       }
-       if (len > MAX_BUF_SIZE) {
-               dev_err(cs->dev, "%s: packet too large (%d bytes)\n",
-                       __func__, len);
-               return -EINVAL;
-       }
-
-       /* set up acknowledgement header */
-       if (skb_headroom(skb) < HW_HDR_LEN) {
-               /* should never happen */
-               dev_err(cs->dev, "%s: insufficient skb headroom\n", __func__);
-               return -ENOMEM;
-       }
-       skb_set_mac_header(skb, -HW_HDR_LEN);
-       skb->mac_len = HW_HDR_LEN;
-       ack_header = skb_mac_header(skb);
-       if (ack) {
-               ack_header[0] = len & 0xff;
-               ack_header[1] = len >> 8;
-       } else {
-               ack_header[0] = ack_header[1] = 0;
-       }
-       gig_dbg(DEBUG_MCMD, "skb: len=%u, ack=%d: %02x %02x",
-               len, ack, ack_header[0], ack_header[1]);
-
-       /* pass to device-specific module */
-       return cs->ops->send_skb(bcs, skb);
-}
-
-/**
- * gigaset_skb_sent() - acknowledge sending an skb
- * @bcs:       B channel descriptor structure.
- * @skb:       sent data.
- *
- * Called by hardware module {bas,ser,usb}_gigaset when the data in a
- * skb has been successfully sent, for signalling completion to the LL.
- */
-void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
-{
-       isdn_if *iif = bcs->cs->iif;
-       unsigned char *ack_header = skb_mac_header(skb);
-       unsigned len;
-       isdn_ctrl response;
-
-       ++bcs->trans_up;
-
-       if (skb->len)
-               dev_warn(bcs->cs->dev, "%s: skb->len==%d\n",
-                        __func__, skb->len);
-
-       len = ack_header[0] + ((unsigned) ack_header[1] << 8);
-       if (len) {
-               gig_dbg(DEBUG_MCMD, "ACKing to LL (id: %d, ch: %d, sz: %u)",
-                       bcs->cs->myid, bcs->channel, len);
-
-               response.driver = bcs->cs->myid;
-               response.command = ISDN_STAT_BSENT;
-               response.arg = bcs->channel;
-               response.parm.length = len;
-               iif->statcallb(&response);
-       }
-}
-EXPORT_SYMBOL_GPL(gigaset_skb_sent);
-
-/**
- * gigaset_skb_rcvd() - pass received skb to LL
- * @bcs:       B channel descriptor structure.
- * @skb:       received data.
- *
- * Called by hardware module {bas,ser,usb}_gigaset when user data has
- * been successfully received, for passing to the LL.
- * Warning: skb must not be accessed anymore!
- */
-void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
-{
-       isdn_if *iif = bcs->cs->iif;
-
-       iif->rcvcallb_skb(bcs->cs->myid, bcs->channel, skb);
-       bcs->trans_down++;
-}
-EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
-
-/**
- * gigaset_isdn_rcv_err() - signal receive error
- * @bcs:       B channel descriptor structure.
- *
- * Called by hardware module {bas,ser,usb}_gigaset when a receive error
- * has occurred, for signalling to the LL.
- */
-void gigaset_isdn_rcv_err(struct bc_state *bcs)
-{
-       isdn_if *iif = bcs->cs->iif;
-       isdn_ctrl response;
-
-       /* if currently ignoring packets, just count down */
-       if (bcs->ignore) {
-               bcs->ignore--;
-               return;
-       }
-
-       /* update statistics */
-       bcs->corrupted++;
-
-       /* error -> LL */
-       gig_dbg(DEBUG_CMD, "sending L1ERR");
-       response.driver = bcs->cs->myid;
-       response.command = ISDN_STAT_L1ERR;
-       response.arg = bcs->channel;
-       response.parm.errcode = ISDN_STAT_L1ERR_RECV;
-       iif->statcallb(&response);
-}
-EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
-
-/* This function will be called by LL to send commands
- * NOTE: LL ignores the returned value, for commands other than ISDN_CMD_IOCTL,
- * so don't put too much effort into it.
- */
-static int command_from_LL(isdn_ctrl *cntrl)
-{
-       struct cardstate *cs;
-       struct bc_state *bcs;
-       int retval = 0;
-       char **commands;
-       int ch;
-       int i;
-       size_t l;
-
-       gig_dbg(DEBUG_CMD, "driver: %d, command: %d, arg: 0x%lx",
-               cntrl->driver, cntrl->command, cntrl->arg);
-
-       cs = gigaset_get_cs_by_id(cntrl->driver);
-       if (cs == NULL) {
-               pr_err("%s: invalid driver ID (%d)\n", __func__, cntrl->driver);
-               return -ENODEV;
-       }
-       ch = cntrl->arg & 0xff;
-
-       switch (cntrl->command) {
-       case ISDN_CMD_IOCTL:
-               dev_warn(cs->dev, "ISDN_CMD_IOCTL not supported\n");
-               return -EINVAL;
-
-       case ISDN_CMD_DIAL:
-               gig_dbg(DEBUG_CMD,
-                       "ISDN_CMD_DIAL (phone: %s, msn: %s, si1: %d, si2: %d)",
-                       cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
-                       cntrl->parm.setup.si1, cntrl->parm.setup.si2);
-
-               if (ch >= cs->channels) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_DIAL: invalid channel (%d)\n", ch);
-                       return -EINVAL;
-               }
-               bcs = cs->bcs + ch;
-               if (gigaset_get_channel(bcs) < 0) {
-                       dev_err(cs->dev, "ISDN_CMD_DIAL: channel not free\n");
-                       return -EBUSY;
-               }
-               switch (bcs->proto2) {
-               case L2_HDLC:
-                       bcs->rx_bufsize = SBUFSIZE;
-                       break;
-               default:                        /* assume transparent */
-                       bcs->rx_bufsize = TRANSBUFSIZE;
-               }
-               dev_kfree_skb(bcs->rx_skb);
-               gigaset_new_rx_skb(bcs);
-
-               commands = kcalloc(AT_NUM, sizeof(*commands), GFP_ATOMIC);
-               if (!commands) {
-                       gigaset_free_channel(bcs);
-                       dev_err(cs->dev, "ISDN_CMD_DIAL: out of memory\n");
-                       return -ENOMEM;
-               }
-
-               l = 3 + strlen(cntrl->parm.setup.phone);
-               commands[AT_DIAL] = kmalloc(l, GFP_ATOMIC);
-               if (!commands[AT_DIAL])
-                       goto oom;
-               if (cntrl->parm.setup.phone[0] == '*' &&
-                   cntrl->parm.setup.phone[1] == '*') {
-                       /* internal call: translate ** prefix to CTP value */
-                       commands[AT_TYPE] = kstrdup("^SCTP=0\r", GFP_ATOMIC);
-                       if (!commands[AT_TYPE])
-                               goto oom;
-                       snprintf(commands[AT_DIAL], l,
-                                "D%s\r", cntrl->parm.setup.phone + 2);
-               } else {
-                       commands[AT_TYPE] = kstrdup("^SCTP=1\r", GFP_ATOMIC);
-                       if (!commands[AT_TYPE])
-                               goto oom;
-                       snprintf(commands[AT_DIAL], l,
-                                "D%s\r", cntrl->parm.setup.phone);
-               }
-
-               l = strlen(cntrl->parm.setup.eazmsn);
-               if (l) {
-                       l += 8;
-                       commands[AT_MSN] = kmalloc(l, GFP_ATOMIC);
-                       if (!commands[AT_MSN])
-                               goto oom;
-                       snprintf(commands[AT_MSN], l, "^SMSN=%s\r",
-                                cntrl->parm.setup.eazmsn);
-               }
-
-               switch (cntrl->parm.setup.si1) {
-               case 1:         /* audio */
-                       /* BC = 9090A3: 3.1 kHz audio, A-law */
-                       commands[AT_BC] = kstrdup("^SBC=9090A3\r", GFP_ATOMIC);
-                       if (!commands[AT_BC])
-                               goto oom;
-                       break;
-               case 7:         /* data */
-               default:        /* hope the app knows what it is doing */
-                       /* BC = 8890: unrestricted digital information */
-                       commands[AT_BC] = kstrdup("^SBC=8890\r", GFP_ATOMIC);
-                       if (!commands[AT_BC])
-                               goto oom;
-               }
-               /* ToDo: other si1 values, inspect si2, set HLC/LLC */
-
-               commands[AT_PROTO] = kmalloc(9, GFP_ATOMIC);
-               if (!commands[AT_PROTO])
-                       goto oom;
-               snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
-
-               commands[AT_ISO] = kmalloc(9, GFP_ATOMIC);
-               if (!commands[AT_ISO])
-                       goto oom;
-               snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
-                        (unsigned) bcs->channel + 1);
-
-               if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
-                                      bcs->at_state.seq_index, NULL)) {
-                       for (i = 0; i < AT_NUM; ++i)
-                               kfree(commands[i]);
-                       kfree(commands);
-                       gigaset_free_channel(bcs);
-                       return -ENOMEM;
-               }
-               gigaset_schedule_event(cs);
-               break;
-       case ISDN_CMD_ACCEPTD:
-               gig_dbg(DEBUG_CMD, "ISDN_CMD_ACCEPTD");
-               if (ch >= cs->channels) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_ACCEPTD: invalid channel (%d)\n", ch);
-                       return -EINVAL;
-               }
-               bcs = cs->bcs + ch;
-               switch (bcs->proto2) {
-               case L2_HDLC:
-                       bcs->rx_bufsize = SBUFSIZE;
-                       break;
-               default:                        /* assume transparent */
-                       bcs->rx_bufsize = TRANSBUFSIZE;
-               }
-               dev_kfree_skb(bcs->rx_skb);
-               gigaset_new_rx_skb(bcs);
-               if (!gigaset_add_event(cs, &bcs->at_state,
-                                      EV_ACCEPT, NULL, 0, NULL))
-                       return -ENOMEM;
-               gigaset_schedule_event(cs);
-
-               break;
-       case ISDN_CMD_HANGUP:
-               gig_dbg(DEBUG_CMD, "ISDN_CMD_HANGUP");
-               if (ch >= cs->channels) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_HANGUP: invalid channel (%d)\n", ch);
-                       return -EINVAL;
-               }
-               bcs = cs->bcs + ch;
-               if (!gigaset_add_event(cs, &bcs->at_state,
-                                      EV_HUP, NULL, 0, NULL))
-                       return -ENOMEM;
-               gigaset_schedule_event(cs);
-
-               break;
-       case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */
-               dev_info(cs->dev, "ignoring ISDN_CMD_CLREAZ\n");
-               break;
-       case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */
-               dev_info(cs->dev, "ignoring ISDN_CMD_SETEAZ (%s)\n",
-                        cntrl->parm.num);
-               break;
-       case ISDN_CMD_SETL2: /* Set L2 to given protocol */
-               if (ch >= cs->channels) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_SETL2: invalid channel (%d)\n", ch);
-                       return -EINVAL;
-               }
-               bcs = cs->bcs + ch;
-               if (bcs->chstate & CHS_D_UP) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_SETL2: channel active (%d)\n", ch);
-                       return -EINVAL;
-               }
-               switch (cntrl->arg >> 8) {
-               case ISDN_PROTO_L2_HDLC:
-                       gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_HDLC");
-                       bcs->proto2 = L2_HDLC;
-                       break;
-               case ISDN_PROTO_L2_TRANS:
-                       gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL2: setting L2_VOICE");
-                       bcs->proto2 = L2_VOICE;
-                       break;
-               default:
-                       dev_err(cs->dev,
-                               "ISDN_CMD_SETL2: unsupported protocol (%lu)\n",
-                               cntrl->arg >> 8);
-                       return -EINVAL;
-               }
-               break;
-       case ISDN_CMD_SETL3: /* Set L3 to given protocol */
-               gig_dbg(DEBUG_CMD, "ISDN_CMD_SETL3");
-               if (ch >= cs->channels) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_SETL3: invalid channel (%d)\n", ch);
-                       return -EINVAL;
-               }
-
-               if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
-                       dev_err(cs->dev,
-                               "ISDN_CMD_SETL3: unsupported protocol (%lu)\n",
-                               cntrl->arg >> 8);
-                       return -EINVAL;
-               }
-
-               break;
-
-       default:
-               gig_dbg(DEBUG_CMD, "unknown command %d from LL",
-                       cntrl->command);
-               return -EINVAL;
-       }
-
-       return retval;
-
-oom:
-       dev_err(bcs->cs->dev, "out of memory\n");
-       for (i = 0; i < AT_NUM; ++i)
-               kfree(commands[i]);
-       kfree(commands);
-       gigaset_free_channel(bcs);
-       return -ENOMEM;
-}
-
-static void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
-{
-       isdn_if *iif = cs->iif;
-       isdn_ctrl command;
-
-       command.driver = cs->myid;
-       command.command = cmd;
-       command.arg = 0;
-       iif->statcallb(&command);
-}
-
-static void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
-{
-       isdn_if *iif = bcs->cs->iif;
-       isdn_ctrl command;
-
-       command.driver = bcs->cs->myid;
-       command.command = cmd;
-       command.arg = bcs->channel;
-       iif->statcallb(&command);
-}
-
-/**
- * gigaset_isdn_icall() - signal incoming call
- * @at_state:  connection state structure.
- *
- * Called by main module to notify the LL that an incoming call has been
- * received. @at_state contains the parameters of the call.
- *
- * Return value: call disposition (ICALL_*)
- */
-int gigaset_isdn_icall(struct at_state_t *at_state)
-{
-       struct cardstate *cs = at_state->cs;
-       struct bc_state *bcs = at_state->bcs;
-       isdn_if *iif = cs->iif;
-       isdn_ctrl response;
-       int retval;
-
-       /* fill ICALL structure */
-       response.parm.setup.si1 = 0;    /* default: unknown */
-       response.parm.setup.si2 = 0;
-       response.parm.setup.screen = 0;
-       response.parm.setup.plan = 0;
-       if (!at_state->str_var[STR_ZBC]) {
-               /* no BC (internal call): assume speech, A-law */
-               response.parm.setup.si1 = 1;
-       } else if (!strcmp(at_state->str_var[STR_ZBC], "8890")) {
-               /* unrestricted digital information */
-               response.parm.setup.si1 = 7;
-       } else if (!strcmp(at_state->str_var[STR_ZBC], "8090A3")) {
-               /* speech, A-law */
-               response.parm.setup.si1 = 1;
-       } else if (!strcmp(at_state->str_var[STR_ZBC], "9090A3")) {
-               /* 3,1 kHz audio, A-law */
-               response.parm.setup.si1 = 1;
-               response.parm.setup.si2 = 2;
-       } else {
-               dev_warn(cs->dev, "RING ignored - unsupported BC %s\n",
-                        at_state->str_var[STR_ZBC]);
-               return ICALL_IGNORE;
-       }
-       if (at_state->str_var[STR_NMBR]) {
-               strlcpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
-                       sizeof response.parm.setup.phone);
-       } else
-               response.parm.setup.phone[0] = 0;
-       if (at_state->str_var[STR_ZCPN]) {
-               strlcpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
-                       sizeof response.parm.setup.eazmsn);
-       } else
-               response.parm.setup.eazmsn[0] = 0;
-
-       if (!bcs) {
-               dev_notice(cs->dev, "no channel for incoming call\n");
-               response.command = ISDN_STAT_ICALLW;
-               response.arg = 0;
-       } else {
-               gig_dbg(DEBUG_CMD, "Sending ICALL");
-               response.command = ISDN_STAT_ICALL;
-               response.arg = bcs->channel;
-       }
-       response.driver = cs->myid;
-       retval = iif->statcallb(&response);
-       gig_dbg(DEBUG_CMD, "Response: %d", retval);
-       switch (retval) {
-       case 0: /* no takers */
-               return ICALL_IGNORE;
-       case 1: /* alerting */
-               bcs->chstate |= CHS_NOTIFY_LL;
-               return ICALL_ACCEPT;
-       case 2: /* reject */
-               return ICALL_REJECT;
-       case 3: /* incomplete */
-               dev_warn(cs->dev,
-                        "LL requested unsupported feature: Incomplete Number\n");
-               return ICALL_IGNORE;
-       case 4: /* proceeding */
-               /* Gigaset will send ALERTING anyway.
-                * There doesn't seem to be a way to avoid this.
-                */
-               return ICALL_ACCEPT;
-       case 5: /* deflect */
-               dev_warn(cs->dev,
-                        "LL requested unsupported feature: Call Deflection\n");
-               return ICALL_IGNORE;
-       default:
-               dev_err(cs->dev, "LL error %d on ICALL\n", retval);
-               return ICALL_IGNORE;
-       }
-}
-
-/**
- * gigaset_isdn_connD() - signal D channel connect
- * @bcs:       B channel descriptor structure.
- *
- * Called by main module to notify the LL that the D channel connection has
- * been established.
- */
-void gigaset_isdn_connD(struct bc_state *bcs)
-{
-       gig_dbg(DEBUG_CMD, "sending DCONN");
-       gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DCONN);
-}
-
-/**
- * gigaset_isdn_hupD() - signal D channel hangup
- * @bcs:       B channel descriptor structure.
- *
- * Called by main module to notify the LL that the D channel connection has
- * been shut down.
- */
-void gigaset_isdn_hupD(struct bc_state *bcs)
-{
-       gig_dbg(DEBUG_CMD, "sending DHUP");
-       gigaset_i4l_channel_cmd(bcs, ISDN_STAT_DHUP);
-}
-
-/**
- * gigaset_isdn_connB() - signal B channel connect
- * @bcs:       B channel descriptor structure.
- *
- * Called by main module to notify the LL that the B channel connection has
- * been established.
- */
-void gigaset_isdn_connB(struct bc_state *bcs)
-{
-       gig_dbg(DEBUG_CMD, "sending BCONN");
-       gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BCONN);
-}
-
-/**
- * gigaset_isdn_hupB() - signal B channel hangup
- * @bcs:       B channel descriptor structure.
- *
- * Called by main module to notify the LL that the B channel connection has
- * been shut down.
- */
-void gigaset_isdn_hupB(struct bc_state *bcs)
-{
-       gig_dbg(DEBUG_CMD, "sending BHUP");
-       gigaset_i4l_channel_cmd(bcs, ISDN_STAT_BHUP);
-}
-
-/**
- * gigaset_isdn_start() - signal device availability
- * @cs:                device descriptor structure.
- *
- * Called by main module to notify the LL that the device is available for
- * use.
- */
-void gigaset_isdn_start(struct cardstate *cs)
-{
-       gig_dbg(DEBUG_CMD, "sending RUN");
-       gigaset_i4l_cmd(cs, ISDN_STAT_RUN);
-}
-
-/**
- * gigaset_isdn_stop() - signal device unavailability
- * @cs:                device descriptor structure.
- *
- * Called by main module to notify the LL that the device is no longer
- * available for use.
- */
-void gigaset_isdn_stop(struct cardstate *cs)
-{
-       gig_dbg(DEBUG_CMD, "sending STOP");
-       gigaset_i4l_cmd(cs, ISDN_STAT_STOP);
-}
-
-/**
- * gigaset_isdn_regdev() - register to LL
- * @cs:                device descriptor structure.
- * @isdnid:    device name.
- *
- * Return value: 0 on success, error code < 0 on failure
- */
-int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
-{
-       isdn_if *iif;
-
-       iif = kmalloc(sizeof *iif, GFP_KERNEL);
-       if (!iif) {
-               pr_err("out of memory\n");
-               return -ENOMEM;
-       }
-
-       if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
-           >= sizeof iif->id) {
-               pr_err("ID too long: %s\n", isdnid);
-               kfree(iif);
-               return -EINVAL;
-       }
-
-       iif->owner = THIS_MODULE;
-       iif->channels = cs->channels;
-       iif->maxbufsize = MAX_BUF_SIZE;
-       iif->features = ISDN_FEATURE_L2_TRANS |
-               ISDN_FEATURE_L2_HDLC |
-               ISDN_FEATURE_L2_X75I |
-               ISDN_FEATURE_L3_TRANS |
-               ISDN_FEATURE_P_EURO;
-       iif->hl_hdrlen = HW_HDR_LEN;            /* Area for storing ack */
-       iif->command = command_from_LL;
-       iif->writebuf_skb = writebuf_from_LL;
-       iif->writecmd = NULL;                   /* Don't support isdnctrl */
-       iif->readstat = NULL;                   /* Don't support isdnctrl */
-       iif->rcvcallb_skb = NULL;               /* Will be set by LL */
-       iif->statcallb = NULL;                  /* Will be set by LL */
-
-       if (!register_isdn(iif)) {
-               pr_err("register_isdn failed\n");
-               kfree(iif);
-               return -EINVAL;
-       }
-
-       cs->iif = iif;
-       cs->myid = iif->channels;               /* Set my device id */
-       cs->hw_hdr_len = HW_HDR_LEN;
-       return 0;
-}
-
-/**
- * gigaset_isdn_unregdev() - unregister device from LL
- * @cs:                device descriptor structure.
- */
-void gigaset_isdn_unregdev(struct cardstate *cs)
-{
-       gig_dbg(DEBUG_CMD, "sending UNLOAD");
-       gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD);
-       kfree(cs->iif);
-       cs->iif = NULL;
-}
-
-/**
- * gigaset_isdn_regdrv() - register driver to LL
- */
-void gigaset_isdn_regdrv(void)
-{
-       pr_info("ISDN4Linux interface\n");
-       /* nothing to do */
-}
-
-/**
- * gigaset_isdn_unregdrv() - unregister driver from LL
- */
-void gigaset_isdn_unregdrv(void)
-{
-       /* nothing to do */
-}