]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[PATCH] isdn4linux: Siemens Gigaset drivers - isdn4linux interface
authorHansjoerg Lipp <hjlipp@web.de>
Sun, 26 Mar 2006 09:38:31 +0000 (01:38 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Sun, 26 Mar 2006 16:57:05 +0000 (08:57 -0800)
And: Tilman Schmidt <tilman@imap.cc>

This patch adds the isdn4linux subsystem interface to the gigaset module.  The
isdn4linux subsystem interface handles requests from and notifications to the
isdn4linux subsystem.

Signed-off-by: Hansjoerg Lipp <hjlipp@web.de>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Cc: Karsten Keil <kkeil@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/isdn/gigaset/i4l.c [new file with mode: 0644]

diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c
new file mode 100644 (file)
index 0000000..731a675
--- /dev/null
@@ -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;
+}