/*
* Stuff used by all variants of the driver
*
* Copyright (c) 2001 by Stefan Eilers (Eilers.Stefan@epost.de),
* Hansjoerg Lipp (hjlipp@web.de),
* Tilman Schmidt (tilman@imap.cc).
*
* =====================================================================
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* =====================================================================
* ToDo: ...
* =====================================================================
* Version: $Id: i4l.c,v 1.3.2.9 2006/02/04 18:28:16 hjlipp Exp $
* =====================================================================
*/
#include "gigaset.h"
/* == 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;
struct bc_state *bcs;
unsigned len;
unsigned skblen;
if (!(cs = gigaset_get_cs_by_id(driverID))) {
err("%s: invalid driver ID (%d)", __func__, driverID);
return -ENODEV;
}
if (channel < 0 || channel >= cs->channels) {
err("%s: invalid channel ID (%d)", __func__, channel);
return -ENODEV;
}
bcs = &cs->bcs[channel];
len = skb->len;
dbg(DEBUG_LLDATA,
"Receiving data from LL (id: %d, channel: %d, ack: %d, size: %d)",
driverID, channel, ack, len);
if (!len) {
if (ack)
warn("not ACKing empty packet from LL");
return 0;
}
if (len > MAX_BUF_SIZE) {
err("%s: packet too large (%d bytes)", __func__, channel);
return -EINVAL;
}
if (!atomic_read(&cs->connected))
return -ENODEV;
skblen = ack ? len : 0;
skb->head[0] = skblen & 0xff;
skb->head[1] = skblen >> 8;
dbg(DEBUG_MCMD, "skb: len=%u, skblen=%u: %02x %02x", len, skblen,
(unsigned) skb->head[0], (unsigned) skb->head[1]);
/* pass to device-specific module */
return cs->ops->send_skb(bcs, skb);
}
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *skb)
{
unsigned len;
isdn_ctrl response;
++bcs->trans_up;
if (skb->len)
warn("%s: skb->len==%d", __func__, skb->len);
len = (unsigned char) skb->head[0] |
(unsigned) (unsigned char) skb->head[1] << 8;
if (len) {
dbg(DEBUG_MCMD,
"Acknowledge sending to LL (id: %d, channel: %d size: %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;
bcs->cs->iif.statcallb(&response);
}
}
EXPORT_SYMBOL_GPL(gigaset_skb_sent);
/* 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 = gigaset_get_cs_by_id(cntrl->driver);
//isdn_ctrl response;
//unsigned long flags;
struct bc_state *bcs;
int retval = 0;
struct setup_parm *sp;
//dbg(DEBUG_ANY, "Gigaset_HW: Receiving command");
gigaset_debugdrivers();
/* Terminate this call if no device is present. Bt if the command is "ISDN_CMD_LOCK" or
* "ISDN_CMD_UNLOCK" then execute it due to the fact that they are device independent !
*/
//FIXME "remove test for &connected"
if ((!cs || !atomic_read(&cs->connected))) {
warn("LL tried to access unknown device with nr. %d",
cntrl->driver);
return -ENODEV;
}
switch (cntrl->command) {
case ISDN_CMD_IOCTL:
dbg(DEBUG_ANY, "ISDN_CMD_IOCTL (driver:%d,arg: %ld)",
cntrl->driver, cntrl->arg);
warn("ISDN_CMD_IOCTL is not supported.");
return -EINVAL;
case ISDN_CMD_DIAL:
dbg(DEBUG_ANY, "ISDN_CMD_DIAL (driver: %d, channel: %ld, "
"phone: %s,ownmsn: %s, si1: %d, si2: %d)",
cntrl->driver, cntrl->arg,
cntrl->parm.setup.phone, cntrl->parm.setup.eazmsn,
cntrl->parm.setup.si1, cntrl->parm.setup.si2);
if (cntrl->arg >= cs->channels) {
err("invalid channel (%d)", (int) cntrl->arg);
return -EINVAL;
}
bcs = cs->bcs + cntrl->arg;
if (!gigaset_get_channel(bcs)) {
err("channel not free");
return -EBUSY;
}
sp = kmalloc(sizeof *sp, GFP_ATOMIC);
if (!sp) {
gigaset_free_channel(bcs);
err("ISDN_CMD_DIAL: out of memory");
return -ENOMEM;
}
*sp = cntrl->parm.setup;
if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, sp,
atomic_read(&bcs->at_state.seq_index),
NULL)) {
//FIXME what should we do?
kfree(sp);
gigaset_free_channel(bcs);
return -ENOMEM;
}
dbg(DEBUG_CMD, "scheduling DIAL");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_ACCEPTD: //FIXME
dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTD");
if (cntrl->arg >= cs->channels) {
err("invalid channel (%d)", (int) cntrl->arg);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
EV_ACCEPT, NULL, 0, NULL)) {
//FIXME what should we do?
return -ENOMEM;
}
dbg(DEBUG_CMD, "scheduling ACCEPT");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_ACCEPTB:
dbg(DEBUG_ANY, "ISDN_CMD_ACCEPTB");
break;
case ISDN_CMD_HANGUP:
dbg(DEBUG_ANY,
"ISDN_CMD_HANGUP (channel: %d)", (int) cntrl->arg);
if (cntrl->arg >= cs->channels) {
err("ISDN_CMD_HANGUP: invalid channel (%u)",
(unsigned) cntrl->arg);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg].at_state,
EV_HUP, NULL, 0, NULL)) {
//FIXME what should we do?
return -ENOMEM;
}
dbg(DEBUG_CMD, "scheduling HUP");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_CLREAZ: /* Do not signal incoming signals */ //FIXME
dbg(DEBUG_ANY, "ISDN_CMD_CLREAZ");
break;
case ISDN_CMD_SETEAZ: /* Signal incoming calls for given MSN */ //FIXME
dbg(DEBUG_ANY,
"ISDN_CMD_SETEAZ (id:%d, channel: %ld, number: %s)",
cntrl->driver, cntrl->arg, cntrl->parm.num);
break;
case ISDN_CMD_SETL2: /* Set L2 to given protocol */
dbg(DEBUG_ANY, "ISDN_CMD_SETL2 (Channel: %ld, Proto: %lx)",
cntrl->arg & 0xff, (cntrl->arg >> 8));
if ((cntrl->arg & 0xff) >= cs->channels) {
err("invalid channel (%u)",
(unsigned) cntrl->arg & 0xff);
return -EINVAL;
}
if (!gigaset_add_event(cs, &cs->bcs[cntrl->arg & 0xff].at_state,
EV_PROTO_L2, NULL, cntrl->arg >> 8,
NULL)) {
//FIXME what should we do?
return -ENOMEM;
}
dbg(DEBUG_CMD, "scheduling PROTO_L2");
gigaset_schedule_event(cs);
break;
case ISDN_CMD_SETL3: /* Set L3 to given protocol */
dbg(DEBUG_ANY, "ISDN_CMD_SETL3 (Channel: %ld, Proto: %lx)",
cntrl->arg & 0xff, (cntrl->arg >> 8));
if ((cntrl->arg & 0xff) >= cs->channels) {
err("invalid channel (%u)",
(unsigned) cntrl->arg & 0xff);
return -EINVAL;
}
if (cntrl->arg >> 8 != ISDN_PROTO_L3_TRANS) {
err("invalid protocol %lu", cntrl->arg >> 8);
return -EINVAL;
}
break;
case ISDN_CMD_PROCEED:
dbg(DEBUG_ANY, "ISDN_CMD_PROCEED"); //FIXME
break;
case ISDN_CMD_ALERT:
dbg(DEBUG_ANY, "ISDN_CMD_ALERT"); //FIXME
if (cntrl->arg >= cs->channels) {
err("invalid channel (%d)", (int) cntrl->arg);
return -EINVAL;
}
//bcs = cs->bcs + cntrl->arg;
//bcs->proto2 = -1;
// FIXME
break;
case ISDN_CMD_REDIR:
dbg(DEBUG_ANY, "ISDN_CMD_REDIR"); //FIXME
break;
case ISDN_CMD_PROT_IO:
dbg(DEBUG_ANY, "ISDN_CMD_PROT_IO");
break;
case ISDN_CMD_FAXCMD:
dbg(DEBUG_ANY, "ISDN_CMD_FAXCMD");
break;
case ISDN_CMD_GETL2:
dbg(DEBUG_ANY, "ISDN_CMD_GETL2");
break;
case ISDN_CMD_GETL3:
dbg(DEBUG_ANY, "ISDN_CMD_GETL3");
break;
case ISDN_CMD_GETEAZ:
dbg(DEBUG_ANY, "ISDN_CMD_GETEAZ");
break;
case ISDN_CMD_SETSIL:
dbg(DEBUG_ANY, "ISDN_CMD_SETSIL");
break;
case ISDN_CMD_GETSIL:
dbg(DEBUG_ANY, "ISDN_CMD_GETSIL");
break;
default:
err("unknown command %d from LL",
cntrl->command);
return -EINVAL;
}
return retval;
}
void gigaset_i4l_cmd(struct cardstate *cs, int cmd)
{
isdn_ctrl command;
command.driver = cs->myid;
command.command = cmd;
command.arg = 0;
cs->iif.statcallb(&command);
}
void gigaset_i4l_channel_cmd(struct bc_state *bcs, int cmd)
{
isdn_ctrl command;
command.driver = bcs->cs->myid;
command.command = cmd;
command.arg = bcs->channel;
bcs->cs->iif.statcallb(&command);
}
int gigaset_isdn_setup_dial(struct at_state_t *at_state, void *data)
{
struct bc_state *bcs = at_state->bcs;
unsigned proto;
const char *bc;
size_t length[AT_NUM];
size_t l;
int i;
struct setup_parm *sp = data;
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
case ISDN_PROTO_L2_TRANS:
proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
default:
err("invalid protocol: %u", bcs->proto2);
return -EINVAL;
}
switch (sp->si1) {
case 1: /* audio */
bc = "9090A3"; /* 3.1 kHz audio, A-law */
break;
case 7: /* data */
default: /* hope the app knows what it is doing */
bc = "8890"; /* unrestricted digital information */
}
//FIXME add missing si1 values from 1TR6, inspect si2, set HLC/LLC
length[AT_DIAL ] = 1 + strlen(sp->phone) + 1 + 1;
l = strlen(sp->eazmsn);
length[AT_MSN ] = l ? 6 + l + 1 + 1 : 0;
length[AT_BC ] = 5 + strlen(bc) + 1 + 1;
length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
length[AT_TYPE ] = 6 + 1 + 1 + 1; /* call type: 1 character */
length[AT_HLC ] = 0;
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = NULL;
if (length[i] &&
!(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
err("out of memory");
return -ENOMEM;
}
}
/* type = 1: extern, 0: intern, 2: recall, 3: door, 4: centrex */
if (sp->phone[0] == '*' && sp->phone[1] == '*') {
/* internal call: translate ** prefix to CTP value */
snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
"D%s\r", sp->phone+2);
strncpy(bcs->commands[AT_TYPE], "^SCTP=0\r", length[AT_TYPE]);
} else {
snprintf(bcs->commands[AT_DIAL], length[AT_DIAL],
"D%s\r", sp->phone);
strncpy(bcs->commands[AT_TYPE], "^SCTP=1\r", length[AT_TYPE]);
}
if (bcs->commands[AT_MSN])
snprintf(bcs->commands[AT_MSN], length[AT_MSN], "^SMSN=%s\r", sp->eazmsn);
snprintf(bcs->commands[AT_BC ], length[AT_BC ], "^SBC=%s\r", bc);
snprintf(bcs->commands[AT_PROTO], length[AT_PROTO], "^SBPR=%u\r", proto);
snprintf(bcs->commands[AT_ISO ], length[AT_ISO ], "^SISO=%u\r", (unsigned)bcs->channel + 1);
return 0;
}
int gigaset_isdn_setup_accept(struct at_state_t *at_state)
{
unsigned proto;
size_t length[AT_NUM];
int i;
struct bc_state *bcs = at_state->bcs;
switch (bcs->proto2) {
case ISDN_PROTO_L2_HDLC:
proto = 1; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
case ISDN_PROTO_L2_TRANS:
proto = 2; /* 0: Bitsynchron, 1: HDLC, 2: voice */
break;
default:
err("invalid protocol: %u", bcs->proto2);
return -EINVAL;
}
length[AT_DIAL ] = 0;
length[AT_MSN ] = 0;
length[AT_BC ] = 0;
length[AT_PROTO] = 6 + 1 + 1 + 1; /* proto: 1 character */
length[AT_ISO ] = 6 + 1 + 1 + 1; /* channel: 1 character */
length[AT_TYPE ] = 0;
length[AT_HLC ] = 0;
for (i = 0; i < AT_NUM; ++i) {
kfree(bcs->commands[i]);
bcs->commands[i] = NULL;
if (length[i] &&
!(bcs->commands[i] = kmalloc(length[i], GFP_ATOMIC))) {
err("out of memory");
return -ENOMEM;
}
}
snprintf(bcs->commands[AT_PROTO], length[AT_PROTO], "^SBPR=%u\r", proto);
snprintf(bcs->commands[AT_ISO ], length[AT_ISO ], "^SISO=%u\r", (unsigned) bcs->channel + 1);
return 0;
}
int gigaset_isdn_icall(struct at_state_t *at_state)
{
struct cardstate *cs = at_state->cs;
struct bc_state *bcs = at_state->bcs;
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; //FIXME how to set these?
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 {
warn("RING ignored - unsupported BC %s",
at_state->str_var[STR_ZBC]);
return ICALL_IGNORE;
}
if (at_state->str_var[STR_NMBR]) {
strncpy(response.parm.setup.phone, at_state->str_var[STR_NMBR],
sizeof response.parm.setup.phone - 1);
response.parm.setup.phone[sizeof response.parm.setup.phone - 1] = 0;
} else
response.parm.setup.phone[0] = 0;
if (at_state->str_var[STR_ZCPN]) {
strncpy(response.parm.setup.eazmsn, at_state->str_var[STR_ZCPN],
sizeof response.parm.setup.eazmsn - 1);
response.parm.setup.eazmsn[sizeof response.parm.setup.eazmsn - 1] = 0;
} else
response.parm.setup.eazmsn[0] = 0;
if (!bcs) {
notice("no channel for incoming call");
dbg(DEBUG_CMD, "Sending ICALLW");
response.command = ISDN_STAT_ICALLW;
response.arg = 0; //FIXME
} else {
dbg(DEBUG_CMD, "Sending ICALL");
response.command = ISDN_STAT_ICALL;
response.arg = bcs->channel; //FIXME
}
response.driver = cs->myid;
retval = cs->iif.statcallb(&response);
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 */
warn("LL requested unsupported feature: Incomplete Number");
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 */
warn("LL requested unsupported feature: Call Deflection");
return ICALL_IGNORE;
default:
err("LL error %d on ICALL", retval);
return ICALL_IGNORE;
}
}
/* Set Callback function pointer */
int gigaset_register_to_LL(struct cardstate *cs, const char *isdnid)
{
isdn_if *iif = &cs->iif;
dbg(DEBUG_ANY, "Register driver capabilities to LL");
//iif->id[sizeof(iif->id) - 1]=0;
//strncpy(iif->id, isdnid, sizeof(iif->id) - 1);
if (snprintf(iif->id, sizeof iif->id, "%s_%u", isdnid, cs->minor_index)
>= sizeof iif->id)
return -ENOMEM; //FIXME EINVAL/...??
iif->owner = THIS_MODULE;
iif->channels = cs->channels; /* I am supporting just one channel *//* I was supporting...*/
iif->maxbufsize = MAX_BUF_SIZE;
iif->features = ISDN_FEATURE_L2_TRANS | /* Our device is very advanced, therefore */
ISDN_FEATURE_L2_HDLC |
#ifdef GIG_X75
ISDN_FEATURE_L2_X75I |
#endif
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))
return 0;
cs->myid = iif->channels; /* Set my device id */
return 1;
}
