diff options
| -rw-r--r-- | drivers/isdn/gigaset/i4l.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c new file mode 100644 index 00000000000..731a675f21b --- /dev/null +++ b/drivers/isdn/gigaset/i4l.c @@ -0,0 +1,567 @@ +/* + * 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; +} |