gigaset: add Kernel CAPI interface (v3)
Add a Kernel CAPI interface to the Gigaset driver.
Impact: optional new functionality
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
new file mode 100644
index 0000000..c276a92
--- /dev/null
+++ b/drivers/isdn/gigaset/capi.c
@@ -0,0 +1,2273 @@
+/*
+ * Kernel CAPI interface for the Gigaset driver
+ *
+ * Copyright (c) 2009 by 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/ctype.h>
+#include <linux/isdn/capilli.h>
+#include <linux/isdn/capicmd.h>
+#include <linux/isdn/capiutil.h>
+
+/* missing from kernelcapi.h */
+#define CapiNcpiNotSupportedByProtocol 0x0001
+#define CapiFlagsNotSupportedByProtocol 0x0002
+#define CapiAlertAlreadySent 0x0003
+#define CapiFacilitySpecificFunctionNotSupported 0x3011
+
+/* missing from capicmd.h */
+#define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN+4+2+8*1)
+#define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+3*1)
+#define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
+#define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
+#define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN+4+4+2+2+2+8)
+#define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN+4+2+2)
+#define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN+4+2)
+#define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+2+1)
+#define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN+4+2+2+1)
+/* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
+#define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN+4+2)
+
+#define CAPI_FACILITY_HANDSET 0x0000
+#define CAPI_FACILITY_DTMF 0x0001
+#define CAPI_FACILITY_V42BIS 0x0002
+#define CAPI_FACILITY_SUPPSVC 0x0003
+#define CAPI_FACILITY_WAKEUP 0x0004
+#define CAPI_FACILITY_LI 0x0005
+
+#define CAPI_SUPPSVC_GETSUPPORTED 0x0000
+
+/* missing from capiutil.h */
+#define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
+#define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
+#define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
+#define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
+#define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
+#define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
+#define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
+#define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
+
+/* parameters with differing location in DATA_B3_CONF/_RESP: */
+#define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
+#define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
+
+/* Flags (DATA_B3_REQ/_IND) */
+#define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
+#define CAPI_FLAGS_RESERVED (~0x1f)
+
+/* buffer sizes */
+#define MAX_BC_OCTETS 11
+#define MAX_HLC_OCTETS 3
+#define MAX_NUMBER_DIGITS 20
+#define MAX_FMT_IE_LEN 20
+
+/* values for gigaset_capi_appl.connected */
+#define APCONN_NONE 0 /* inactive/listening */
+#define APCONN_SETUP 1 /* connecting */
+#define APCONN_ACTIVE 2 /* B channel up */
+
+/* registered application data structure */
+struct gigaset_capi_appl {
+ struct list_head ctrlist;
+ struct gigaset_capi_appl *bcnext;
+ u16 id;
+ u16 nextMessageNumber;
+ u32 listenInfoMask;
+ u32 listenCIPmask;
+ int connected;
+};
+
+/* CAPI specific controller data structure */
+struct gigaset_capi_ctr {
+ struct capi_ctr ctr;
+ struct list_head appls;
+ struct sk_buff_head sendqueue;
+ atomic_t sendqlen;
+ /* two _cmsg structures possibly used concurrently: */
+ _cmsg hcmsg; /* for message composition triggered from hardware */
+ _cmsg acmsg; /* for dissection of messages sent from application */
+ u8 bc_buf[MAX_BC_OCTETS+1];
+ u8 hlc_buf[MAX_HLC_OCTETS+1];
+ u8 cgpty_buf[MAX_NUMBER_DIGITS+3];
+ u8 cdpty_buf[MAX_NUMBER_DIGITS+2];
+};
+
+/* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
+static struct {
+ u8 *bc;
+ u8 *hlc;
+} cip2bchlc[] = {
+ [1] = { "8090A3", NULL },
+ /* Speech (A-law) */
+ [2] = { "8890", NULL },
+ /* Unrestricted digital information */
+ [3] = { "8990", NULL },
+ /* Restricted digital information */
+ [4] = { "9090A3", NULL },
+ /* 3,1 kHz audio (A-law) */
+ [5] = { "9190", NULL },
+ /* 7 kHz audio */
+ [6] = { "9890", NULL },
+ /* Video */
+ [7] = { "88C0C6E6", NULL },
+ /* Packet mode */
+ [8] = { "8890218F", NULL },
+ /* 56 kbit/s rate adaptation */
+ [9] = { "9190A5", NULL },
+ /* Unrestricted digital information with tones/announcements */
+ [16] = { "8090A3", "9181" },
+ /* Telephony */
+ [17] = { "9090A3", "9184" },
+ /* Group 2/3 facsimile */
+ [18] = { "8890", "91A1" },
+ /* Group 4 facsimile Class 1 */
+ [19] = { "8890", "91A4" },
+ /* Teletex service basic and mixed mode
+ and Group 4 facsimile service Classes II and III */
+ [20] = { "8890", "91A8" },
+ /* Teletex service basic and processable mode */
+ [21] = { "8890", "91B1" },
+ /* Teletex service basic mode */
+ [22] = { "8890", "91B2" },
+ /* International interworking for Videotex */
+ [23] = { "8890", "91B5" },
+ /* Telex */
+ [24] = { "8890", "91B8" },
+ /* Message Handling Systems in accordance with X.400 */
+ [25] = { "8890", "91C1" },
+ /* OSI application in accordance with X.200 */
+ [26] = { "9190A5", "9181" },
+ /* 7 kHz telephony */
+ [27] = { "9190A5", "916001" },
+ /* Video telephony, first connection */
+ [28] = { "8890", "916002" },
+ /* Video telephony, second connection */
+};
+
+/*
+ * helper functions
+ * ================
+ */
+
+/*
+ * emit unsupported parameter warning
+ */
+static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
+ char *msgname, char *paramname)
+{
+ if (param && *param)
+ dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
+ msgname, paramname);
+}
+
+static inline void ignore_cmstruct_param(struct cardstate *cs, _cmstruct param,
+ char *msgname, char *paramname)
+{
+ if (param != CAPI_DEFAULT)
+ dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
+ msgname, paramname);
+}
+
+/*
+ * check for legal hex digit
+ */
+static inline int ishexdigit(char c)
+{
+ if (c >= '0' && c <= '9')
+ return 1;
+ if (c >= 'A' && c <= 'F')
+ return 1;
+ if (c >= 'a' && c <= 'f')
+ return 1;
+ return 0;
+}
+
+/*
+ * convert hex to binary
+ */
+static inline u8 hex2bin(char c)
+{
+ int result = c & 0x0f;
+ if (c & 0x40)
+ result += 9;
+ return result;
+}
+
+/*
+ * convert an IE from Gigaset hex string to ETSI binary representation
+ * including length byte
+ * return value: result length, -1 on error
+ */
+static int encode_ie(char *in, u8 *out, int maxlen)
+{
+ int l = 0;
+ while (*in) {
+ if (!ishexdigit(in[0]) || !ishexdigit(in[1]) || l >= maxlen)
+ return -1;
+ out[++l] = (hex2bin(in[0]) << 4) + hex2bin(in[1]);
+ in += 2;
+ }
+ out[0] = l;
+ return l;
+}
+
+/*
+ * convert an IE from ETSI binary representation including length byte
+ * to Gigaset hex string
+ */
+static void decode_ie(u8 *in, char *out)
+{
+ int i = *in;
+ while (i-- > 0) {
+ /* ToDo: conversion to upper case necessary? */
+ *out++ = toupper(hex_asc_hi(*++in));
+ *out++ = toupper(hex_asc_lo(*in));
+ }
+}
+
+/*
+ * retrieve application data structure for an application ID
+ */
+static inline struct gigaset_capi_appl *
+get_appl(struct gigaset_capi_ctr *iif, u16 appl)
+{
+ struct gigaset_capi_appl *ap;
+
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (ap->id == appl)
+ return ap;
+ return NULL;
+}
+
+/*
+ * dump CAPI message to kernel messages for debugging
+ */
+static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ _cdebbuf *cdb;
+
+ if (!(gigaset_debuglevel & level))
+ return;
+
+ cdb = capi_cmsg2str(p);
+ if (cdb) {
+ gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
+ cdebbuf_free(cdb);
+ } else {
+ gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
+ capi_cmd2str(p->Command, p->Subcommand));
+ }
+#endif
+}
+
+static inline void dump_rawmsg(enum debuglevel level, const char *tag,
+ unsigned char *data)
+{
+#ifdef CONFIG_GIGASET_DEBUG
+ char *dbgline;
+ int i, l;
+
+ if (!(gigaset_debuglevel & level))
+ return;
+
+ l = CAPIMSG_LEN(data);
+ if (l < 12) {
+ gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
+ return;
+ }
+ gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
+ tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
+ CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
+ CAPIMSG_CONTROL(data));
+ l -= 12;
+ dbgline = kmalloc(3*l, GFP_ATOMIC);
+ if (!dbgline)
+ return;
+ for (i = 0; i < l; i++) {
+ dbgline[3*i] = hex_asc_hi(data[12+i]);
+ dbgline[3*i+1] = hex_asc_lo(data[12+i]);
+ dbgline[3*i+2] = ' ';
+ }
+ dbgline[3*l-1] = '\0';
+ gig_dbg(level, " %s", dbgline);
+ kfree(dbgline);
+ if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
+ (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
+ CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
+ CAPIMSG_DATALEN(data) > 0) {
+ l = CAPIMSG_DATALEN(data);
+ dbgline = kmalloc(3*l, GFP_ATOMIC);
+ if (!dbgline)
+ return;
+ data += CAPIMSG_LEN(data);
+ for (i = 0; i < l; i++) {
+ dbgline[3*i] = hex_asc_hi(data[i]);
+ dbgline[3*i+1] = hex_asc_lo(data[i]);
+ dbgline[3*i+2] = ' ';
+ }
+ dbgline[3*l-1] = '\0';
+ gig_dbg(level, " %s", dbgline);
+ kfree(dbgline);
+ }
+#endif
+}
+
+/*
+ * format CAPI IE as string
+ */
+
+static const char *format_ie(const char *ie)
+{
+ static char result[3*MAX_FMT_IE_LEN];
+ int len, count;
+ char *pout = result;
+
+ if (!ie)
+ return "NULL";
+
+ count = len = ie[0];
+ if (count > MAX_FMT_IE_LEN)
+ count = MAX_FMT_IE_LEN-1;
+ while (count--) {
+ *pout++ = hex_asc_hi(*++ie);
+ *pout++ = hex_asc_lo(*ie);
+ *pout++ = ' ';
+ }
+ if (len > MAX_FMT_IE_LEN) {
+ *pout++ = '.';
+ *pout++ = '.';
+ *pout++ = '.';
+ }
+ *--pout = 0;
+ return result;
+}
+
+
+/*
+ * driver interface functions
+ * ==========================
+ */
+
+/**
+ * gigaset_skb_sent() - acknowledge transmission of outgoing 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 *dskb)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ struct sk_buff *cskb;
+ u16 flags;
+
+ /* update statistics */
+ ++bcs->trans_up;
+
+ if (!ap) {
+ dev_err(cs->dev, "%s: no application\n", __func__);
+ return;
+ }
+
+ /* don't send further B3 messages if disconnected */
+ if (ap->connected < APCONN_ACTIVE) {
+ gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
+ return;
+ }
+
+ /* ToDo: honor unset "delivery confirmation" bit */
+ flags = CAPIMSG_FLAGS(dskb->head);
+
+ /* build DATA_B3_CONF message */
+ cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
+ if (!cskb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ /* frequent message, avoid _cmsg overhead */
+ CAPIMSG_SETLEN(cskb->data, CAPI_DATA_B3_CONF_LEN);
+ CAPIMSG_SETAPPID(cskb->data, ap->id);
+ CAPIMSG_SETCOMMAND(cskb->data, CAPI_DATA_B3);
+ CAPIMSG_SETSUBCOMMAND(cskb->data, CAPI_CONF);
+ CAPIMSG_SETMSGID(cskb->data, CAPIMSG_MSGID(dskb->head));
+ CAPIMSG_SETCONTROLLER(cskb->data, iif->ctr.cnr);
+ CAPIMSG_SETPLCI_PART(cskb->data, bcs->channel + 1);
+ CAPIMSG_SETNCCI_PART(cskb->data, 1);
+ CAPIMSG_SETHANDLE_CONF(cskb->data, CAPIMSG_HANDLE_REQ(dskb->head));
+ if (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION)
+ CAPIMSG_SETINFO_CONF(cskb->data,
+ CapiFlagsNotSupportedByProtocol);
+ else
+ CAPIMSG_SETINFO_CONF(cskb->data, CAPI_NOERROR);
+
+ /* emit message */
+ dump_rawmsg(DEBUG_LLDATA, "DATA_B3_CONF", cskb->data);
+ capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
+}
+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)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ int len = skb->len;
+
+ /* update statistics */
+ bcs->trans_down++;
+
+ if (!ap) {
+ dev_err(cs->dev, "%s: no application\n", __func__);
+ return;
+ }
+
+ /* don't send further B3 messages if disconnected */
+ if (ap->connected < APCONN_ACTIVE) {
+ gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ /*
+ * prepend DATA_B3_IND message to payload
+ * Parameters: NCCI = 1, all others 0/unused
+ * frequent message, avoid _cmsg overhead
+ */
+ skb_push(skb, CAPI_DATA_B3_REQ_LEN);
+ CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
+ CAPIMSG_SETAPPID(skb->data, ap->id);
+ CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
+ CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
+ CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
+ CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
+ CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
+ CAPIMSG_SETNCCI_PART(skb->data, 1);
+ /* Data parameter not used */
+ CAPIMSG_SETDATALEN(skb->data, len);
+ /* Data handle parameter not used */
+ CAPIMSG_SETFLAGS(skb->data, 0);
+ /* Data64 parameter not present */
+
+ /* emit message */
+ dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+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)
+{
+ /* if currently ignoring packets, just count down */
+ if (bcs->ignore) {
+ bcs->ignore--;
+ return;
+ }
+
+ /* update statistics */
+ bcs->corrupted++;
+
+ /* ToDo: signal error -> LL */
+}
+EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
+
+/**
+ * gigaset_isdn_icall() - signal incoming call
+ * @at_state: connection state structure.
+ *
+ * Called by main module at tasklet level 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;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap;
+ u32 actCIPmask;
+ struct sk_buff *skb;
+ unsigned int msgsize;
+ int i;
+
+ /*
+ * ToDo: signal calls without a free B channel, too
+ * (requires a u8 handle for the at_state structure that can
+ * be stored in the PLCI and used in the CONNECT_RESP message
+ * handler to retrieve it)
+ */
+ if (!bcs)
+ return ICALL_IGNORE;
+
+ /* prepare CONNECT_IND message, using B channel number as PLCI */
+ capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+
+ /* minimum size, all structs empty */
+ msgsize = CAPI_CONNECT_IND_BASELEN;
+
+ /* Bearer Capability (mandatory) */
+ if (at_state->str_var[STR_ZBC]) {
+ /* pass on BC from Gigaset */
+ if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
+ MAX_BC_OCTETS) < 0) {
+ dev_warn(cs->dev, "RING ignored - bad BC %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+
+ /* look up corresponding CIP value */
+ iif->hcmsg.CIPValue = 0; /* default if nothing found */
+ for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
+ if (cip2bchlc[i].bc != NULL &&
+ cip2bchlc[i].hlc == NULL &&
+ !strcmp(cip2bchlc[i].bc,
+ at_state->str_var[STR_ZBC])) {
+ iif->hcmsg.CIPValue = i;
+ break;
+ }
+ } else {
+ /* no BC (internal call): assume CIP 1 (speech, A-law) */
+ iif->hcmsg.CIPValue = 1;
+ encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
+ }
+ iif->hcmsg.BC = iif->bc_buf;
+ msgsize += iif->hcmsg.BC[0];
+
+ /* High Layer Compatibility (optional) */
+ if (at_state->str_var[STR_ZHLC]) {
+ /* pass on HLC from Gigaset */
+ if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
+ MAX_HLC_OCTETS) < 0) {
+ dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
+ at_state->str_var[STR_ZHLC]);
+ return ICALL_IGNORE;
+ }
+ iif->hcmsg.HLC = iif->hlc_buf;
+ msgsize += iif->hcmsg.HLC[0];
+
+ /* look up corresponding CIP value */
+ /* keep BC based CIP value if none found */
+ if (at_state->str_var[STR_ZBC])
+ for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
+ if (cip2bchlc[i].hlc != NULL &&
+ !strcmp(cip2bchlc[i].hlc,
+ at_state->str_var[STR_ZHLC]) &&
+ !strcmp(cip2bchlc[i].bc,
+ at_state->str_var[STR_ZBC])) {
+ iif->hcmsg.CIPValue = i;
+ break;
+ }
+ }
+
+ /* Called Party Number (optional) */
+ if (at_state->str_var[STR_ZCPN]) {
+ i = strlen(at_state->str_var[STR_ZCPN]);
+ if (i > MAX_NUMBER_DIGITS) {
+ dev_warn(cs->dev, "RING ignored - bad number %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+ iif->cdpty_buf[0] = i + 1;
+ iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
+ memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
+ iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
+ msgsize += iif->hcmsg.CalledPartyNumber[0];
+ }
+
+ /* Calling Party Number (optional) */
+ if (at_state->str_var[STR_NMBR]) {
+ i = strlen(at_state->str_var[STR_NMBR]);
+ if (i > MAX_NUMBER_DIGITS) {
+ dev_warn(cs->dev, "RING ignored - bad number %s\n",
+ at_state->str_var[STR_ZBC]);
+ return ICALL_IGNORE;
+ }
+ iif->cgpty_buf[0] = i + 2;
+ iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
+ iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
+ memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
+ iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
+ msgsize += iif->hcmsg.CallingPartyNumber[0];
+ }
+
+ /* remaining parameters (not supported, always left NULL):
+ * - CalledPartySubaddress
+ * - CallingPartySubaddress
+ * - AdditionalInfo
+ * - BChannelinformation
+ * - Keypadfacility
+ * - Useruserdata
+ * - Facilitydataarray
+ */
+
+ gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
+ iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
+ format_ie(iif->hcmsg.BC));
+ gig_dbg(DEBUG_CMD, "icall: HLC %s",
+ format_ie(iif->hcmsg.HLC));
+ gig_dbg(DEBUG_CMD, "icall: CgPty %s",
+ format_ie(iif->hcmsg.CallingPartyNumber));
+ gig_dbg(DEBUG_CMD, "icall: CdPty %s",
+ format_ie(iif->hcmsg.CalledPartyNumber));
+
+ /* scan application list for matching listeners */
+ bcs->ap = NULL;
+ actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (actCIPmask & ap->listenCIPmask) {
+ /* build CONNECT_IND message for this application */
+ iif->hcmsg.ApplId = ap->id;
+ iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
+
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n",
+ __func__);
+ break;
+ }
+ capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+
+ /* add to listeners on this B channel, update state */
+ ap->bcnext = bcs->ap;
+ bcs->ap = ap;
+ bcs->chstate |= CHS_NOTIFY_LL;
+ ap->connected = APCONN_SETUP;
+
+ /* emit message */
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+ }
+
+ /*
+ * Return "accept" if any listeners.
+ * Gigaset will send ALERTING.
+ * There doesn't seem to be a way to avoid this.
+ */
+ return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
+}
+
+/*
+ * send a DISCONNECT_IND message to an application
+ * does not sleep, clobbers the controller's hcmsg structure
+ */
+static void send_disconnect_ind(struct bc_state *bcs,
+ struct gigaset_capi_appl *ap, u16 reason)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct sk_buff *skb;
+
+ if (ap->connected == APCONN_NONE)
+ return;
+
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+ iif->hcmsg.Reason = reason;
+ skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ ap->connected = APCONN_NONE;
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * send a DISCONNECT_B3_IND message to an application
+ * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
+ * does not sleep, clobbers the controller's hcmsg structure
+ */
+static void send_disconnect_b3_ind(struct bc_state *bcs,
+ struct gigaset_capi_appl *ap)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct sk_buff *skb;
+
+ /* nothing to do if no logical connection active */
+ if (ap->connected < APCONN_ACTIVE)
+ return;
+ ap->connected = APCONN_SETUP;
+
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
+ skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ capi_cmsg2message(&iif->hcmsg,
+ __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * gigaset_isdn_connD() - signal D channel connect
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the D channel
+ * connection has been established.
+ */
+void gigaset_isdn_connD(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ struct sk_buff *skb;
+ unsigned int msgsize;
+
+ if (!ap) {
+ dev_err(cs->dev, "%s: no application\n", __func__);
+ return;
+ }
+ while (ap->bcnext) {
+ /* this should never happen */
+ dev_warn(cs->dev, "%s: dropping extra application %u\n",
+ __func__, ap->bcnext->id);
+ send_disconnect_ind(bcs, ap->bcnext,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = ap->bcnext->bcnext;
+ }
+ if (ap->connected == APCONN_NONE) {
+ dev_warn(cs->dev, "%s: application %u not connected\n",
+ __func__, ap->id);
+ return;
+ }
+
+ /* prepare CONNECT_ACTIVE_IND message
+ * Note: LLC not supported by device
+ */
+ capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8));
+
+ /* minimum size, all structs empty */
+ msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
+
+ /* ToDo: set parameter: Connected number
+ * (requires ev-layer state machine extension to collect
+ * ZCON device reply)
+ */
+
+ /* build and emit CONNECT_ACTIVE_IND message */
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * gigaset_isdn_hupD() - signal D channel hangup
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the D channel
+ * connection has been shut down.
+ */
+void gigaset_isdn_hupD(struct bc_state *bcs)
+{
+ struct gigaset_capi_appl *ap;
+
+ /*
+ * ToDo: pass on reason code reported by device
+ * (requires ev-layer state machine extension to collect
+ * ZCAU device reply)
+ */
+ for (ap = bcs->ap; ap != NULL; ap = ap->bcnext) {
+ send_disconnect_b3_ind(bcs, ap);
+ send_disconnect_ind(bcs, ap, 0);
+ }
+ bcs->ap = NULL;
+}
+
+/**
+ * gigaset_isdn_connB() - signal B channel connect
+ * @bcs: B channel descriptor structure.
+ *
+ * Called by main module at tasklet level to notify the LL that the B channel
+ * connection has been established.
+ */
+void gigaset_isdn_connB(struct bc_state *bcs)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_ctr *iif = cs->iif;
+ struct gigaset_capi_appl *ap = bcs->ap;
+ struct sk_buff *skb;
+ unsigned int msgsize;
+ u8 command;
+
+ if (!ap) {
+ dev_err(cs->dev, "%s: no application\n", __func__);
+ return;
+ }
+ while (ap->bcnext) {
+ /* this should never happen */
+ dev_warn(cs->dev, "%s: dropping extra application %u\n",
+ __func__, ap->bcnext->id);
+ send_disconnect_ind(bcs, ap->bcnext,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = ap->bcnext->bcnext;
+ }
+ if (!ap->connected) {
+ dev_warn(cs->dev, "%s: application %u not connected\n",
+ __func__, ap->id);
+ return;
+ }
+
+ /*
+ * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
+ * otherwise we have to emit CONNECT_B3_IND first, and follow up with
+ * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
+ * Parameters in both cases always: NCCI = 1, NCPI empty
+ */
+ if (ap->connected >= APCONN_ACTIVE) {
+ command = CAPI_CONNECT_B3_ACTIVE;
+ msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
+ } else {
+ command = CAPI_CONNECT_B3;
+ msgsize = CAPI_CONNECT_B3_IND_BASELEN;
+ }
+ capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
+ skb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
+ ap->connected = APCONN_ACTIVE;
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/**
+ * 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)
+{
+ struct cardstate *cs = bcs->cs;
+ struct gigaset_capi_appl *ap = bcs->ap;
+
+ /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
+
+ if (!ap) {
+ dev_err(cs->dev, "%s: no application\n", __func__);
+ return;
+ }
+
+ send_disconnect_b3_ind(bcs, ap);
+}
+
+/**
+ * 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)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+
+ /* fill profile data: manufacturer name */
+ strcpy(iif->ctr.manu, "Siemens");
+ /* CAPI and device version */
+ iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
+ iif->ctr.version.minorversion = 0;
+ /* ToDo: check/assert cs->gotfwver? */
+ iif->ctr.version.majormanuversion = cs->fwver[0];
+ iif->ctr.version.minormanuversion = cs->fwver[1];
+ /* number of B channels supported */
+ iif->ctr.profile.nbchannel = cs->channels;
+ /* global options: internal controller, supplementary services */
+ iif->ctr.profile.goptions = 0x11;
+ /* B1 protocols: 64 kbit/s HDLC or transparent */
+ iif->ctr.profile.support1 = 0x03;
+ /* B2 protocols: transparent only */
+ /* ToDo: X.75 SLP ? */
+ iif->ctr.profile.support2 = 0x02;
+ /* B3 protocols: transparent only */
+ iif->ctr.profile.support3 = 0x01;
+ /* no serial number */
+ strcpy(iif->ctr.serial, "0");
+ capi_ctr_ready(&iif->ctr);
+}
+
+/**
+ * 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)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+ capi_ctr_down(&iif->ctr);
+}
+
+/*
+ * kernel CAPI callback methods
+ * ============================
+ */
+
+/*
+ * load firmware
+ */
+static int gigaset_load_firmware(struct capi_ctr *ctr, capiloaddata *data)
+{
+ struct cardstate *cs = ctr->driverdata;
+
+ /* AVM specific operation, not needed for Gigaset -- ignore */
+ dev_notice(cs->dev, "load_firmware ignored\n");
+
+ return 0;
+}
+
+/*
+ * reset (deactivate) controller
+ */
+static void gigaset_reset_ctr(struct capi_ctr *ctr)
+{
+ struct cardstate *cs = ctr->driverdata;
+
+ /* AVM specific operation, not needed for Gigaset -- ignore */
+ dev_notice(cs->dev, "reset_ctr ignored\n");
+}
+
+/*
+ * register CAPI application
+ */
+static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
+ capi_register_params *rp)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = ctr->driverdata;
+ struct gigaset_capi_appl *ap;
+
+ list_for_each_entry(ap, &iif->appls, ctrlist)
+ if (ap->id == appl) {
+ dev_notice(cs->dev,
+ "application %u already registered\n", appl);
+ return;
+ }
+
+ ap = kzalloc(sizeof(*ap), GFP_KERNEL);
+ if (!ap) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ ap->id = appl;
+
+ list_add(&ap->ctrlist, &iif->appls);
+}
+
+/*
+ * release CAPI application
+ */
+static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct gigaset_capi_appl *ap, *tmp;
+
+ list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
+ if (ap->id == appl) {
+ if (ap->connected != APCONN_NONE) {
+ dev_err(cs->dev,
+ "%s: application %u still connected\n",
+ __func__, ap->id);
+ /* ToDo: clear active connection */
+ }
+ list_del(&ap->ctrlist);
+ kfree(ap);
+ }
+
+}
+
+/*
+ * =====================================================================
+ * outgoing CAPI message handler
+ * =====================================================================
+ */
+
+/*
+ * helper function: emit reply message with given Info value
+ */
+static void send_conf(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb,
+ u16 info)
+{
+ /*
+ * _CONF replies always only have NCCI and Info parameters
+ * so they'll fit into the _REQ message skb
+ */
+ capi_cmsg_answer(&iif->acmsg);
+ iif->acmsg.Info = info;
+ capi_cmsg2message(&iif->acmsg, skb->data);
+ __skb_trim(skb, CAPI_STDCONF_LEN);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * process FACILITY_REQ message
+ */
+static void do_facility_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct sk_buff *cskb;
+ u8 *pparam;
+ unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
+ u16 function, info;
+ static u8 confparam[10]; /* max. 9 octets + length byte */
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /*
+ * Facility Request Parameter is not decoded by capi_message2cmsg()
+ * encoding depends on Facility Selector
+ */
+ switch (iif->acmsg.FacilitySelector) {
+ case CAPI_FACILITY_DTMF: /* ToDo */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* DTMF information: Unknown DTMF request */
+ capimsg_setu16(confparam, 1, 2);
+ break;
+
+ case CAPI_FACILITY_V42BIS: /* not supported */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* V.42 bis information: not available */
+ capimsg_setu16(confparam, 1, 1);
+ break;
+
+ case CAPI_FACILITY_SUPPSVC:
+ /* decode Function parameter */
+ pparam = iif->acmsg.FacilityRequestParameter;
+ if (pparam == NULL || *pparam < 2) {
+ dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
+ "Facility Request Parameter");
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding);
+ return;
+ }
+ function = CAPIMSG_U16(pparam, 1);
+ switch (function) {
+ case CAPI_SUPPSVC_GETSUPPORTED:
+ info = CapiSuccess;
+ /* Supplementary Service specific parameter */
+ confparam[3] = 6; /* length */
+ /* Supplementary services info: Success */
+ capimsg_setu16(confparam, 4, CapiSuccess);
+ /* Supported Services: none */
+ capimsg_setu32(confparam, 6, 0);
+ break;
+ /* ToDo: add supported services */
+ default:
+ info = CapiFacilitySpecificFunctionNotSupported;
+ /* Supplementary Service specific parameter */
+ confparam[3] = 2; /* length */
+ /* Supplementary services info: not supported */
+ capimsg_setu16(confparam, 4,
+ CapiSupplementaryServiceNotSupported);
+ }
+
+ /* Facility confirmation parameter */
+ confparam[0] = confparam[3] + 3; /* total length */
+ /* Function: copy from _REQ message */
+ capimsg_setu16(confparam, 1, function);
+ /* Supplementary Service specific parameter already set above */
+ break;
+
+ case CAPI_FACILITY_WAKEUP: /* ToDo */
+ info = CapiFacilityNotSupported;
+ confparam[0] = 2; /* length */
+ /* Number of accepted awake request parameters: 0 */
+ capimsg_setu16(confparam, 1, 0);
+ break;
+
+ default:
+ info = CapiFacilityNotSupported;
+ confparam[0] = 0; /* empty struct */
+ }
+
+ /* send FACILITY_CONF with given Info and confirmation parameter */
+ capi_cmsg_answer(&iif->acmsg);
+ iif->acmsg.Info = info;
+ iif->acmsg.FacilityConfirmationParameter = confparam;
+ msgsize += confparam[0]; /* length */
+ cskb = alloc_skb(msgsize, GFP_ATOMIC);
+ if (!cskb) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ return;
+ }
+ capi_cmsg2message(&iif->acmsg, __skb_put(cskb, msgsize));
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
+}
+
+
+/*
+ * process LISTEN_REQ message
+ * just store the masks in the application data structure
+ */
+static void do_listen_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* store listening parameters */
+ ap->listenInfoMask = iif->acmsg.InfoMask;
+ ap->listenCIPmask = iif->acmsg.CIPmask;
+ send_conf(iif, ap, skb, CapiSuccess);
+}
+
+/*
+ * process ALERT_REQ message
+ * nothing to do, Gigaset always alerts anyway
+ */
+static void do_alert_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb, CapiAlertAlreadySent);
+}
+
+/*
+ * process CONNECT_REQ message
+ * allocate a B channel, prepare dial commands, queue a DIAL event,
+ * emit CONNECT_CONF reply
+ */
+static void do_connect_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ char **commands;
+ char *s;
+ u8 *pp;
+ int i, l;
+ u16 info;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* get free B channel & construct PLCI */
+ bcs = gigaset_get_free_channel(cs);
+ if (!bcs) {
+ dev_notice(cs->dev, "%s: no B channel available\n",
+ "CONNECT_REQ");
+ send_conf(iif, ap, skb, CapiNoPlciAvailable);
+ return;
+ }
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+ cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
+
+ /* build command table */
+ commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
+ if (!commands)
+ goto oom;
+
+ /* encode parameter: Called party number */
+ pp = cmsg->CalledPartyNumber;
+ if (pp == NULL || *pp == 0) {
+ dev_notice(cs->dev, "%s: %s missing\n",
+ "CONNECT_REQ", "Called party number");
+ info = CapiIllMessageParmCoding;
+ goto error;
+ }
+ l = *pp++;
+ /* check type of number/numbering plan byte */
+ switch (*pp) {
+ case 0x80: /* unknown type / unknown numbering plan */
+ case 0x81: /* unknown type / ISDN/Telephony numbering plan */
+ break;
+ default: /* others: warn about potential misinterpretation */
+ dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
+ "CONNECT_REQ", "Called party number", *pp);
+ }
+ pp++;
+ l--;
+ /* translate "**" internal call prefix to CTP value */
+ if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
+ s = "^SCTP=0\r";
+ pp += 2;
+ l -= 2;
+ } else {
+ s = "^SCTP=1\r";
+ }
+ commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
+ if (!commands[AT_TYPE])
+ goto oom;
+ commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
+ if (!commands[AT_DIAL])
+ goto oom;
+ snprintf(commands[AT_DIAL], l+3, "D%*s\r", l, pp);
+
+ /* encode parameter: Calling party number */
+ pp = cmsg->CallingPartyNumber;
+ if (pp != NULL && *pp > 0) {
+ l = *pp++;
+
+ /* check type of number/numbering plan byte */
+ /* ToDo: allow for/handle Ext=1? */
+ switch (*pp) {
+ case 0x00: /* unknown type / unknown numbering plan */
+ case 0x01: /* unknown type / ISDN/Telephony num. plan */
+ break;
+ default:
+ dev_notice(cs->dev,
+ "%s: %s type/plan 0x%02x unsupported\n",
+ "CONNECT_REQ", "Calling party number", *pp);
+ }
+ pp++;
+ l--;
+
+ /* check presentation indicator */
+ if (!l) {
+ dev_notice(cs->dev, "%s: %s IE truncated\n",
+ "CONNECT_REQ", "Calling party number");
+ info = CapiIllMessageParmCoding;
+ goto error;
+ }
+ switch (*pp & 0xfc) { /* ignore Screening indicator */
+ case 0x80: /* Presentation allowed */
+ s = "^SCLIP=1\r";
+ break;
+ case 0xa0: /* Presentation restricted */
+ s = "^SCLIP=0\r";
+ break;
+ default:
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_REQ",
+ "Presentation/Screening indicator",
+ *pp);
+ s = "^SCLIP=1\r";
+ }
+ commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
+ if (!commands[AT_CLIP])
+ goto oom;
+ pp++;
+ l--;
+
+ if (l) {
+ /* number */
+ commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
+ if (!commands[AT_MSN])
+ goto oom;
+ snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
+ }
+ }
+
+ /* check parameter: CIP Value */
+ if (cmsg->CIPValue > ARRAY_SIZE(cip2bchlc) ||
+ (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
+ dev_notice(cs->dev, "%s: unknown CIP value %d\n",
+ "CONNECT_REQ", cmsg->CIPValue);
+ info = CapiCipValueUnknown;
+ goto error;
+ }
+
+ /* check/encode parameter: BC */
+ if (cmsg->BC && cmsg->BC[0]) {
+ /* explicit BC overrides CIP */
+ l = 2*cmsg->BC[0] + 7;
+ commands[AT_BC] = kmalloc(l, GFP_KERNEL);
+ if (!commands[AT_BC])
+ goto oom;
+ strcpy(commands[AT_BC], "^SBC=");
+ decode_ie(cmsg->BC, commands[AT_BC]+5);
+ strcpy(commands[AT_BC] + l - 2, "\r");
+ } else if (cip2bchlc[cmsg->CIPValue].bc) {
+ l = strlen(cip2bchlc[cmsg->CIPValue].bc) + 7;
+ commands[AT_BC] = kmalloc(l, GFP_KERNEL);
+ if (!commands[AT_BC])
+ goto oom;
+ snprintf(commands[AT_BC], l, "^SBC=%s\r",
+ cip2bchlc[cmsg->CIPValue].bc);
+ }
+
+ /* check/encode parameter: HLC */
+ if (cmsg->HLC && cmsg->HLC[0]) {
+ /* explicit HLC overrides CIP */
+ l = 2*cmsg->HLC[0] + 7;
+ commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
+ if (!commands[AT_HLC])
+ goto oom;
+ strcpy(commands[AT_HLC], "^SHLC=");
+ decode_ie(cmsg->HLC, commands[AT_HLC]+5);
+ strcpy(commands[AT_HLC] + l - 2, "\r");
+ } else if (cip2bchlc[cmsg->CIPValue].hlc) {
+ l = strlen(cip2bchlc[cmsg->CIPValue].hlc) + 7;
+ commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
+ if (!commands[AT_HLC])
+ goto oom;
+ snprintf(commands[AT_HLC], l, "^SHLC=%s\r",
+ cip2bchlc[cmsg->CIPValue].hlc);
+ }
+
+ /* check/encode parameter: B Protocol */
+ if (cmsg->BProtocol == CAPI_DEFAULT) {
+ bcs->proto2 = L2_HDLC;
+ dev_warn(cs->dev,
+ "B2 Protocol X.75 SLP unsupported, using Transparent\n");
+ } else {
+ switch (cmsg->B1protocol) {
+ case 0:
+ bcs->proto2 = L2_HDLC;
+ break;
+ case 1:
+ bcs->proto2 = L2_BITSYNC;
+ break;
+ default:
+ dev_warn(cs->dev,
+ "B1 Protocol %u unsupported, using Transparent\n",
+ cmsg->B1protocol);
+ bcs->proto2 = L2_BITSYNC;
+ }
+ if (cmsg->B2protocol != 1)
+ dev_warn(cs->dev,
+ "B2 Protocol %u unsupported, using Transparent\n",
+ cmsg->B2protocol);
+ if (cmsg->B3protocol != 0)
+ dev_warn(cs->dev,
+ "B3 Protocol %u unsupported, using Transparent\n",
+ cmsg->B3protocol);
+ ignore_cstruct_param(cs, cmsg->B1configuration,
+ "CONNECT_REQ", "B1 Configuration");
+ ignore_cstruct_param(cs, cmsg->B2configuration,
+ "CONNECT_REQ", "B2 Configuration");
+ ignore_cstruct_param(cs, cmsg->B3configuration,
+ "CONNECT_REQ", "B3 Configuration");
+ }
+ commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
+ if (!commands[AT_PROTO])
+ goto oom;
+ snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
+
+ /* ToDo: check/encode remaining parameters */
+ ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
+ "CONNECT_REQ", "Called pty subaddr");
+ ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
+ "CONNECT_REQ", "Calling pty subaddr");
+ ignore_cstruct_param(cs, cmsg->LLC,
+ "CONNECT_REQ", "LLC");
+ ignore_cmstruct_param(cs, cmsg->AdditionalInfo,
+ "CONNECT_REQ", "Additional Info");
+
+ /* encode parameter: B channel to use */
+ commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
+ if (!commands[AT_ISO])
+ goto oom;
+ snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
+ (unsigned) bcs->channel + 1);
+
+ /* queue & schedule EV_DIAL event */
+ if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
+ bcs->at_state.seq_index, NULL))
+ goto oom;
+ gig_dbg(DEBUG_CMD, "scheduling DIAL");
+ gigaset_schedule_event(cs);
+ ap->connected = APCONN_SETUP;
+ send_conf(iif, ap, skb, CapiSuccess);
+ return;
+
+oom:
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ info = CAPI_MSGOSRESOURCEERR;
+error:
+ if (commands)
+ for (i = 0; i < AT_NUM; i++)
+ kfree(commands[i]);
+ kfree(commands);
+ gigaset_free_channel(bcs);
+ send_conf(iif, ap, skb, info);
+}
+
+/*
+ * process CONNECT_RESP message
+ * checks protocol parameters and queues an ACCEPT or HUP event
+ */
+static void do_connect_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ _cmsg *cmsg = &iif->acmsg;
+ struct bc_state *bcs;
+ struct gigaset_capi_appl *oap;
+ int channel;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ dev_kfree_skb(skb);
+
+ /* extract and check channel number from PLCI */
+ channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
+ return;
+ }
+ bcs = cs->bcs + channel - 1;
+
+ switch (cmsg->Reject) {
+ case 0: /* Accept */
+ /* drop all competing applications, keep only this one */
+ for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
+ if (oap != ap)
+ send_disconnect_ind(bcs, oap,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+ bcs->chstate |= CHS_NOTIFY_LL;
+
+ /* check/encode B channel protocol */
+ if (cmsg->BProtocol == CAPI_DEFAULT) {
+ bcs->proto2 = L2_HDLC;
+ dev_warn(cs->dev,
+ "B2 Protocol X.75 SLP unsupported, using Transparent\n");
+ } else {
+ switch (cmsg->B1protocol) {
+ case 0:
+ bcs->proto2 = L2_HDLC;
+ break;
+ case 1:
+ bcs->proto2 = L2_BITSYNC;
+ break;
+ default:
+ dev_warn(cs->dev,
+ "B1 Protocol %u unsupported, using Transparent\n",
+ cmsg->B1protocol);
+ bcs->proto2 = L2_BITSYNC;
+ }
+ if (cmsg->B2protocol != 1)
+ dev_warn(cs->dev,
+ "B2 Protocol %u unsupported, using Transparent\n",
+ cmsg->B2protocol);
+ if (cmsg->B3protocol != 0)
+ dev_warn(cs->dev,
+ "B3 Protocol %u unsupported, using Transparent\n",
+ cmsg->B3protocol);
+ ignore_cstruct_param(cs, cmsg->B1configuration,
+ "CONNECT_RESP", "B1 Configuration");
+ ignore_cstruct_param(cs, cmsg->B2configuration,
+ "CONNECT_RESP", "B2 Configuration");
+ ignore_cstruct_param(cs, cmsg->B3configuration,
+ "CONNECT_RESP", "B3 Configuration");
+ }
+
+ /* ToDo: check/encode remaining parameters */
+ ignore_cstruct_param(cs, cmsg->ConnectedNumber,
+ "CONNECT_RESP", "Connected Number");
+ ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
+ "CONNECT_RESP", "Connected Subaddress");
+ ignore_cstruct_param(cs, cmsg->LLC,
+ "CONNECT_RESP", "LLC");
+ ignore_cmstruct_param(cs, cmsg->AdditionalInfo,
+ "CONNECT_RESP", "Additional Info");
+
+ /* Accept call */
+ if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
+ EV_ACCEPT, NULL, 0, NULL))
+ return;
+ gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
+ gigaset_schedule_event(cs);
+ return;
+
+ case 1: /* Ignore */
+ /* send DISCONNECT_IND to this application */
+ send_disconnect_ind(bcs, ap, 0);
+
+ /* remove it from the list of listening apps */
+ if (bcs->ap == ap) {
+ bcs->ap = ap->bcnext;
+ if (bcs->ap == NULL)
+ /* last one: stop ev-layer hupD notifications */
+ bcs->chstate &= ~CHS_NOTIFY_LL;
+ return;
+ }
+ for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
+ if (oap->bcnext == ap) {
+ oap->bcnext = oap->bcnext->bcnext;
+ return;
+ }
+ }
+ dev_err(cs->dev, "%s: application %u not found\n",
+ __func__, ap->id);
+ return;
+
+ default: /* Reject */
+ /* drop all competing applications, keep only this one */
+ for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
+ if (oap != ap)
+ send_disconnect_ind(bcs, oap,
+ CapiCallGivenToOtherApplication);
+ ap->bcnext = NULL;
+ bcs->ap = ap;
+
+ /* reject call - will trigger DISCONNECT_IND for this app */
+ dev_info(cs->dev, "%s: Reject=%x\n",
+ "CONNECT_RESP", cmsg->Reject);
+ if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
+ EV_HUP, NULL, 0, NULL))
+ return;
+ gig_dbg(DEBUG_CMD, "scheduling HUP");
+ gigaset_schedule_event(cs);
+ return;
+ }
+}
+
+/*
+ * process CONNECT_B3_REQ message
+ * build NCCI and emit CONNECT_B3_CONF reply
+ */
+static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ int channel;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* extract and check channel number from PLCI */
+ channel = (iif->acmsg.adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_B3_REQ", "PLCI", iif->acmsg.adr.adrPLCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+
+ /* mark logical connection active */
+ ap->connected = APCONN_ACTIVE;
+
+ /* build NCCI: always 1 (one B3 connection only) */
+ iif->acmsg.adr.adrNCCI |= 1 << 16;
+
+ /* NCPI parameter: not applicable for B3 Transparent */
+ ignore_cstruct_param(cs, iif->acmsg.NCPI,
+ "CONNECT_B3_REQ", "NCPI");
+ send_conf(iif, ap, skb,
+ (iif->acmsg.NCPI && iif->acmsg.NCPI[0]) ?
+ CapiNcpiNotSupportedByProtocol : CapiSuccess);
+}
+
+/*
+ * process CONNECT_B3_RESP message
+ * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
+ * or queue EV_HUP and emit DISCONNECT_B3_IND.
+ * The emitted message is always shorter than the received one,
+ * allowing to reuse the skb.
+ */
+static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct bc_state *bcs = NULL;
+ int channel;
+ unsigned int msgsize;
+ u8 command;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* extract and check channel number and NCCI */
+ channel = (iif->acmsg.adr.adrNCCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels ||
+ ((iif->acmsg.adr.adrNCCI >> 16) & 0xffff) != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "CONNECT_B3_RESP", "NCCI", iif->acmsg.adr.adrNCCI);
+ dev_kfree_skb(skb);
+ return;
+ }
+ bcs = &cs->bcs[channel-1];
+
+ if (iif->acmsg.Reject) {
+ /* Reject: clear B3 connect received flag */
+ ap->connected = APCONN_SETUP;
+
+ /* trigger hangup, causing eventual DISCONNECT_IND */
+ if (!gigaset_add_event(cs, &bcs->at_state,
+ EV_HUP, NULL, 0, NULL)) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ dev_kfree_skb(skb);
+ return;
+ }
+ gig_dbg(DEBUG_CMD, "scheduling HUP");
+ gigaset_schedule_event(cs);
+
+ /* emit DISCONNECT_B3_IND */
+ command = CAPI_DISCONNECT_B3;
+ msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
+ } else {
+ /*
+ * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
+ * we only send CONNECT_B3_IND if the B channel is up
+ */
+ command = CAPI_CONNECT_B3_ACTIVE;
+ msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
+ }
+ capi_cmsg_header(&iif->acmsg, ap->id, command, CAPI_IND,
+ ap->nextMessageNumber++, iif->acmsg.adr.adrNCCI);
+ __skb_trim(skb, msgsize);
+ capi_cmsg2message(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, skb);
+}
+
+/*
+ * process DISCONNECT_REQ message
+ * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
+ * emit DISCONNECT_CONF reply
+ */
+static void do_disconnect_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ struct bc_state *bcs;
+ _cmsg *b3cmsg;
+ struct sk_buff *b3skb;
+ int channel;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* extract and check channel number from PLCI */
+ channel = (iif->acmsg.adr.adrPLCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DISCONNECT_REQ", "PLCI", iif->acmsg.adr.adrPLCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ bcs = cs->bcs + channel - 1;
+
+ /* ToDo: process parameter: Additional info */
+ ignore_cmstruct_param(cs, iif->acmsg.AdditionalInfo,
+ "DISCONNECT_REQ", "Additional Info");
+
+ /* skip if DISCONNECT_IND already sent */
+ if (!ap->connected)
+ return;
+
+ /* check for active logical connection */
+ if (ap->connected >= APCONN_ACTIVE) {
+ /*
+ * emit DISCONNECT_B3_IND with cause 0x3301
+ * use separate cmsg structure, as the content of iif->acmsg
+ * is still needed for creating the _CONF message
+ */
+ b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
+ if (!b3cmsg) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
+ ap->nextMessageNumber++,
+ iif->acmsg.adr.adrPLCI | (1 << 16));
+ b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
+ b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
+ if (b3skb == NULL) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ capi_cmsg2message(b3cmsg,
+ __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
+ kfree(b3cmsg);
+ capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
+ }
+
+ /* trigger hangup, causing eventual DISCONNECT_IND */
+ if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ gig_dbg(DEBUG_CMD, "scheduling HUP");
+ gigaset_schedule_event(cs);
+
+ /* emit reply */
+ send_conf(iif, ap, skb, CapiSuccess);
+}
+
+/*
+ * process DISCONNECT_B3_REQ message
+ * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
+ */
+static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ int channel;
+
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+
+ /* extract and check channel number and NCCI */
+ channel = (iif->acmsg.adr.adrNCCI >> 8) & 0xff;
+ if (!channel || channel > cs->channels ||
+ ((iif->acmsg.adr.adrNCCI >> 16) & 0xffff) != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DISCONNECT_B3_REQ", "NCCI", iif->acmsg.adr.adrNCCI);
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+
+ /* reject if logical connection not active */
+ if (ap->connected < APCONN_ACTIVE) {
+ send_conf(iif, ap, skb,
+ CapiMessageNotSupportedInCurrentState);
+ return;
+ }
+
+ /* trigger hangup, causing eventual DISCONNECT_B3_IND */
+ if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
+ EV_HUP, NULL, 0, NULL)) {
+ dev_err(cs->dev, "%s: out of memory\n", __func__);
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+ gig_dbg(DEBUG_CMD, "scheduling HUP");
+ gigaset_schedule_event(cs);
+
+ /* NCPI parameter: not applicable for B3 Transparent */
+ ignore_cstruct_param(cs, iif->acmsg.NCPI,
+ "DISCONNECT_B3_REQ", "NCPI");
+ send_conf(iif, ap, skb,
+ (iif->acmsg.NCPI && iif->acmsg.NCPI[0]) ?
+ CapiNcpiNotSupportedByProtocol : CapiSuccess);
+}
+
+/*
+ * process DATA_B3_REQ message
+ */
+static void do_data_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ struct cardstate *cs = iif->ctr.driverdata;
+ int channel = CAPIMSG_PLCI_PART(skb->data);
+ u16 ncci = CAPIMSG_NCCI_PART(skb->data);
+ u16 msglen = CAPIMSG_LEN(skb->data);
+ u16 datalen = CAPIMSG_DATALEN(skb->data);
+ u16 flags = CAPIMSG_FLAGS(skb->data);
+
+ /* frequent message, avoid _cmsg overhead */
+ dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
+
+ gig_dbg(DEBUG_LLDATA,
+ "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
+ channel, flags, msglen, datalen);
+
+ /* check parameters */
+ if (channel == 0 || channel > cs->channels || ncci != 1) {
+ dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
+ "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
+ send_conf(iif, ap, skb, CapiIllContrPlciNcci);
+ return;
+ }
+ if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
+ dev_notice(cs->dev, "%s: unexpected length %d\n",
+ "DATA_B3_REQ", msglen);
+ if (msglen + datalen != skb->len)
+ dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
+ "DATA_B3_REQ", msglen, datalen, skb->len);
+ if (msglen + datalen > skb->len) {
+ /* message too short for announced data length */
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
+ return;
+ }
+ if (flags & CAPI_FLAGS_RESERVED) {
+ dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
+ "DATA_B3_REQ", flags);
+ send_conf(iif, ap, skb, CapiIllMessageParmCoding);
+ return;
+ }
+
+ /* reject if logical connection not active */
+ if (ap->connected < APCONN_ACTIVE) {
+ send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
+ return;
+ }
+
+ /*
+ * pull CAPI message from skb,
+ * pass payload data to device-specific module
+ * CAPI message will be preserved in headroom
+ */
+ skb_pull(skb, msglen);
+ if (cs->ops->send_skb(&cs->bcs[channel-1], skb) < 0) {
+ send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
+ return;
+ }
+
+ /* DATA_B3_CONF reply will be sent by gigaset_skb_sent() */
+
+ /*
+ * ToDo: honor unset "delivery confirmation" bit
+ * (send DATA_B3_CONF immediately?)
+ */
+}
+
+/*
+ * process RESET_B3_REQ message
+ * just always reply "not supported by current protocol"
+ */
+static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb,
+ CapiResetProcedureNotSupportedByCurrentProtocol);
+}
+
+/*
+ * dump unsupported/ignored messages at most twice per minute,
+ * some apps send those very frequently
+ */
+static unsigned long ignored_msg_dump_time;
+
+/*
+ * unsupported CAPI message handler
+ */
+static void do_unsupported(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
+}
+
+/*
+ * CAPI message handler: no-op
+ */
+static void do_nothing(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
+ /* decode message */
+ capi_message2cmsg(&iif->acmsg, skb->data);
+ dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
+ }
+ dev_kfree_skb(skb);
+}
+
+static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
+ struct gigaset_capi_appl *ap,
+ struct sk_buff *skb)
+{
+ dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
+ dev_kfree_skb(skb);
+}
+
+/* table of outgoing CAPI message handlers with lookup function */
+typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
+ struct gigaset_capi_appl *,
+ struct sk_buff *);
+
+static struct {
+ u16 cmd;
+ capi_send_handler_t handler;
+} capi_send_handler_table[] = {
+ /* most frequent messages first for faster lookup */
+ { CAPI_DATA_B3_REQ, do_data_b3_req },
+ { CAPI_DATA_B3_RESP, do_data_b3_resp },
+
+ { CAPI_ALERT_REQ, do_alert_req },
+ { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
+ { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
+ { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
+ { CAPI_CONNECT_REQ, do_connect_req },
+ { CAPI_CONNECT_RESP, do_connect_resp },
+ { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
+ { CAPI_DISCONNECT_B3_RESP, do_nothing },
+ { CAPI_DISCONNECT_REQ, do_disconnect_req },
+ { CAPI_DISCONNECT_RESP, do_nothing },
+ { CAPI_FACILITY_REQ, do_facility_req },
+ { CAPI_FACILITY_RESP, do_nothing },
+ { CAPI_LISTEN_REQ, do_listen_req },
+ { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
+ { CAPI_RESET_B3_REQ, do_reset_b3_req },
+ { CAPI_RESET_B3_RESP, do_nothing },
+
+ /*
+ * ToDo: support overlap sending (requires ev-layer state
+ * machine extension to generate additional ATD commands)
+ */
+ { CAPI_INFO_REQ, do_unsupported },
+ { CAPI_INFO_RESP, do_nothing },
+
+ /*
+ * ToDo: what's the proper response for these?
+ */
+ { CAPI_MANUFACTURER_REQ, do_nothing },
+ { CAPI_MANUFACTURER_RESP, do_nothing },
+};
+
+/* look up handler */
+static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
+{
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
+ if (capi_send_handler_table[i].cmd == cmd)
+ return capi_send_handler_table[i].handler;
+ return NULL;
+}
+
+
+/**
+ * gigaset_send_message() - accept a CAPI message from an application
+ * @ctr: controller descriptor structure.
+ * @skb: CAPI message.
+ *
+ * Return value: CAPI error code
+ * Note: capidrv (and probably others, too) only uses the return value to
+ * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
+ */
+static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
+{
+ struct gigaset_capi_ctr *iif
+ = container_of(ctr, struct gigaset_capi_ctr, ctr);
+ struct cardstate *cs = ctr->driverdata;
+ struct gigaset_capi_appl *ap;
+ capi_send_handler_t handler;
+
+ /* can only handle linear sk_buffs */
+ if (skb_linearize(skb) < 0) {
+ dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
+ return CAPI_MSGOSRESOURCEERR;
+ }
+
+ /* retrieve application data structure */
+ ap = get_appl(iif, CAPIMSG_APPID(skb->data));
+ if (!ap) {
+ dev_notice(cs->dev, "%s: application %u not registered\n",
+ __func__, CAPIMSG_APPID(skb->data));
+ return CAPI_ILLAPPNR;
+ }
+
+ /* look up command */
+ handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
+ if (!handler) {
+ /* unknown/unsupported message type */
+ if (printk_ratelimit())
+ dev_notice(cs->dev, "%s: unsupported message %u\n",
+ __func__, CAPIMSG_CMD(skb->data));
+ return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
+ }
+
+ /* serialize */
+ if (atomic_add_return(1, &iif->sendqlen) > 1) {
+ /* queue behind other messages */
+ skb_queue_tail(&iif->sendqueue, skb);
+ return CAPI_NOERROR;
+ }
+
+ /* process message */
+ handler(iif, ap, skb);
+
+ /* process other messages arrived in the meantime */
+ while (atomic_sub_return(1, &iif->sendqlen) > 0) {
+ skb = skb_dequeue(&iif->sendqueue);
+ if (!skb) {
+ /* should never happen */
+ dev_err(cs->dev, "%s: send queue empty\n", __func__);
+ continue;
+ }
+ ap = get_appl(iif, CAPIMSG_APPID(skb->data));
+ if (!ap) {
+ /* could that happen? */
+ dev_warn(cs->dev, "%s: application %u vanished\n",
+ __func__, CAPIMSG_APPID(skb->data));
+ continue;
+ }
+ handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
+ if (!handler) {
+ /* should never happen */
+ dev_err(cs->dev, "%s: handler %x vanished\n",
+ __func__, CAPIMSG_CMD(skb->data));
+ continue;
+ }
+ handler(iif, ap, skb);
+ }
+
+ return CAPI_NOERROR;
+}
+
+/**
+ * gigaset_procinfo() - build single line description for controller
+ * @ctr: controller descriptor structure.
+ *
+ * Return value: pointer to generated string (null terminated)
+ */
+static char *gigaset_procinfo(struct capi_ctr *ctr)
+{
+ return ctr->name; /* ToDo: more? */
+}
+
+/**
+ * gigaset_ctr_read_proc() - build controller proc file entry
+ * @page: buffer of PAGE_SIZE bytes for receiving the entry.
+ * @start: unused.
+ * @off: unused.
+ * @count: unused.
+ * @eof: unused.
+ * @ctr: controller descriptor structure.
+ *
+ * Return value: length of generated entry
+ */
+static int gigaset_ctr_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, struct capi_ctr *ctr)
+{
+ struct cardstate *cs = ctr->driverdata;
+ char *s;
+ int i;
+ int len = 0;
+ len += sprintf(page+len, "%-16s %s\n", "name", ctr->name);
+ len += sprintf(page+len, "%-16s %s %s\n", "dev",
+ dev_driver_string(cs->dev), dev_name(cs->dev));
+ len += sprintf(page+len, "%-16s %d\n", "id", cs->myid);
+ if (cs->gotfwver)
+ len += sprintf(page+len, "%-16s %d.%d.%d.%d\n", "firmware",
+ cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
+ len += sprintf(page+len, "%-16s %d\n", "channels",
+ cs->channels);
+ len += sprintf(page+len, "%-16s %s\n", "onechannel",
+ cs->onechannel ? "yes" : "no");
+
+ switch (cs->mode) {
+ case M_UNKNOWN:
+ s = "unknown";
+ break;
+ case M_CONFIG:
+ s = "config";
+ break;
+ case M_UNIMODEM:
+ s = "Unimodem";
+ break;
+ case M_CID:
+ s = "CID";
+ break;
+ default:
+ s = "??";
+ }
+ len += sprintf(page+len, "%-16s %s\n", "mode", s);
+
+ switch (cs->mstate) {
+ case MS_UNINITIALIZED:
+ s = "uninitialized";
+ break;
+ case MS_INIT:
+ s = "init";
+ break;
+ case MS_LOCKED:
+ s = "locked";
+ break;
+ case MS_SHUTDOWN:
+ s = "shutdown";
+ break;
+ case MS_RECOVER:
+ s = "recover";
+ break;
+ case MS_READY:
+ s = "ready";
+ break;
+ default:
+ s = "??";
+ }
+ len += sprintf(page+len, "%-16s %s\n", "mstate", s);
+
+ len += sprintf(page+len, "%-16s %s\n", "running",
+ cs->running ? "yes" : "no");
+ len += sprintf(page+len, "%-16s %s\n", "connected",
+ cs->connected ? "yes" : "no");
+ len += sprintf(page+len, "%-16s %s\n", "isdn_up",
+ cs->isdn_up ? "yes" : "no");
+ len += sprintf(page+len, "%-16s %s\n", "cidmode",
+ cs->cidmode ? "yes" : "no");
+
+ for (i = 0; i < cs->channels; i++) {
+ len += sprintf(page+len, "[%d]%-13s %d\n", i, "corrupted",
+ cs->bcs[i].corrupted);
+ len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_down",
+ cs->bcs[i].trans_down);
+ len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_up",
+ cs->bcs[i].trans_up);
+ len += sprintf(page+len, "[%d]%-13s %d\n", i, "chstate",
+ cs->bcs[i].chstate);
+ switch (cs->bcs[i].proto2) {
+ case L2_BITSYNC:
+ s = "bitsync";
+ break;
+ case L2_HDLC:
+ s = "HDLC";
+ break;
+ case L2_VOICE:
+ s = "voice";
+ break;
+ default:
+ s = "??";
+ }
+ len += sprintf(page+len, "[%d]%-13s %s\n", i, "proto2", s);
+ }
+ return len;
+}
+
+
+static struct capi_driver capi_driver_gigaset = {
+ .name = "gigaset",
+ .revision = "1.0",
+};
+
+/**
+ * gigaset_isdn_register() - register to LL
+ * @cs: device descriptor structure.
+ * @isdnid: device name.
+ *
+ * Called by main module to register the device with the LL.
+ *
+ * Return value: 1 for success, 0 for failure
+ */
+int gigaset_isdn_register(struct cardstate *cs, const char *isdnid)
+{
+ struct gigaset_capi_ctr *iif;
+ int rc;
+
+ pr_info("Kernel CAPI interface\n");
+
+ iif = kmalloc(sizeof(*iif), GFP_KERNEL);
+ if (!iif) {
+ pr_err("%s: out of memory\n", __func__);
+ return 0;
+ }
+
+ /* register driver with CAPI (ToDo: what for?) */
+ register_capi_driver(&capi_driver_gigaset);
+
+ /* prepare controller structure */
+ iif->ctr.owner = THIS_MODULE;
+ iif->ctr.driverdata = cs;
+ strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
+ iif->ctr.driver_name = "gigaset";
+ iif->ctr.load_firmware = gigaset_load_firmware;
+ iif->ctr.reset_ctr = gigaset_reset_ctr;
+ iif->ctr.register_appl = gigaset_register_appl;
+ iif->ctr.release_appl = gigaset_release_appl;
+ iif->ctr.send_message = gigaset_send_message;
+ iif->ctr.procinfo = gigaset_procinfo;
+ iif->ctr.ctr_read_proc = gigaset_ctr_read_proc;
+ INIT_LIST_HEAD(&iif->appls);
+ skb_queue_head_init(&iif->sendqueue);
+ atomic_set(&iif->sendqlen, 0);
+
+ /* register controller with CAPI */
+ rc = attach_capi_ctr(&iif->ctr);
+ if (rc) {
+ pr_err("attach_capi_ctr failed (%d)\n", rc);
+ unregister_capi_driver(&capi_driver_gigaset);
+ kfree(iif);
+ return 0;
+ }
+
+ cs->iif = iif;
+ cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
+ return 1;
+}
+
+/**
+ * gigaset_isdn_unregister() - unregister from LL
+ * @cs: device descriptor structure.
+ *
+ * Called by main module to unregister the device from the LL.
+ */
+void gigaset_isdn_unregister(struct cardstate *cs)
+{
+ struct gigaset_capi_ctr *iif = cs->iif;
+
+ detach_capi_ctr(&iif->ctr);
+ kfree(iif);
+ cs->iif = NULL;
+ unregister_capi_driver(&capi_driver_gigaset);
+}