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command.c

/* $Id: command.c,v 1.4.10.1 2001/09/23 22:24:59 kai Exp $
 *
 * Copyright (C) 1996  SpellCaster Telecommunications Inc.
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * For more information, please contact gpl-info@spellcast.com or write:
 *
 *     SpellCaster Telecommunications Inc.
 *     5621 Finch Avenue East, Unit #3
 *     Scarborough, Ontario  Canada
 *     M1B 2T9
 *     +1 (416) 297-8565
 *     +1 (416) 297-6433 Facsimile
 */

#include <linux/module.h>
#include "includes.h"         /* This must be first */
#include "hardware.h"
#include "message.h"
#include "card.h"
#include "scioc.h"

static int dial(int card, unsigned long channel, setup_parm setup);
static int hangup(int card, unsigned long channel);
static int answer(int card, unsigned long channel);
static int clreaz(int card, unsigned long channel);
static int seteaz(int card, unsigned long channel, char *);
static int setl2(int card, unsigned long arg);
static int setl3(int card, unsigned long arg);
static int acceptb(int card, unsigned long channel);

#ifdef DEBUG
/*
 * Translate command codes to strings
 */
static char *commands[] = { "ISDN_CMD_IOCTL",
                      "ISDN_CMD_DIAL",
                      "ISDN_CMD_ACCEPTB",
                      "ISDN_CMD_ACCEPTB",
                      "ISDN_CMD_HANGUP",
                      "ISDN_CMD_CLREAZ",
                      "ISDN_CMD_SETEAZ",
                      NULL,
                      NULL,
                      NULL,
                      "ISDN_CMD_SETL2",
                      NULL,
                      "ISDN_CMD_SETL3",
                      NULL,
                      NULL,
                      NULL,
                      NULL,
                      NULL, };

/*
 * Translates ISDN4Linux protocol codes to strings for debug messages
 */
static char *l3protos[] = { "ISDN_PROTO_L3_TRANS" };
static char *l2protos[] = { "ISDN_PROTO_L2_X75I",
                      "ISDN_PROTO_L2_X75UI",
                      "ISDN_PROTO_L2_X75BUI",
                      "ISDN_PROTO_L2_HDLC",
                      "ISDN_PROTO_L2_TRANS" };
#endif

int get_card_from_id(int driver)
{
      int i;

      for(i = 0 ; i < cinst ; i++) {
            if(sc_adapter[i]->driverId == driver)
                  return i;
      }
      return -ENODEV;
}

/* 
 * command
 */

int command(isdn_ctrl *cmd)
{
      int card;

      card = get_card_from_id(cmd->driver);
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      /*
       * Dispatch the command
       */
      switch(cmd->command) {
      case ISDN_CMD_IOCTL:
      {
            unsigned long     cmdptr;
            scs_ioctl   ioc;

            memcpy(&cmdptr, cmd->parm.num, sizeof(unsigned long));
            if (copy_from_user(&ioc, (scs_ioctl __user *)cmdptr,
                           sizeof(scs_ioctl))) {
                  pr_debug("%s: Failed to verify user space 0x%lx\n",
                        sc_adapter[card]->devicename, cmdptr);
                  return -EFAULT;
            }
            return sc_ioctl(card, &ioc);
      }
      case ISDN_CMD_DIAL:
            return dial(card, cmd->arg, cmd->parm.setup);
      case ISDN_CMD_HANGUP:
            return hangup(card, cmd->arg);
      case ISDN_CMD_ACCEPTD:
            return answer(card, cmd->arg);
      case ISDN_CMD_ACCEPTB:
            return acceptb(card, cmd->arg);
      case ISDN_CMD_CLREAZ:
            return clreaz(card, cmd->arg);
      case ISDN_CMD_SETEAZ:
            return seteaz(card, cmd->arg, cmd->parm.num);
      case ISDN_CMD_SETL2:
            return setl2(card, cmd->arg);
      case ISDN_CMD_SETL3:
            return setl3(card, cmd->arg);
      default:
            return -EINVAL;
      }
      return 0;
}

/*
 * start the onboard firmware
 */
int startproc(int card) 
{
      int status;

      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      /*
       * send start msg 
       */
            status = sendmessage(card, CMPID,cmReqType2,
                    cmReqClass0,
                    cmReqStartProc,
                    0,0,NULL);
      pr_debug("%s: Sent startProc\n", sc_adapter[card]->devicename);
      
      return status;
}


/*
 * Dials the number passed in 
 */
static int dial(int card, unsigned long channel, setup_parm setup)
{
      int status;
      char Phone[48];
  
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      /*extract ISDN number to dial from eaz/msn string*/ 
      strcpy(Phone,setup.phone); 

      /*send the connection message*/
      status = sendmessage(card, CEPID,ceReqTypePhy,
                        ceReqClass1,
                        ceReqPhyConnect,
                        (unsigned char) channel+1, 
                        strlen(Phone),
                        (unsigned int *) Phone);

      pr_debug("%s: Dialing %s on channel %lu\n",
            sc_adapter[card]->devicename, Phone, channel+1);
      
      return status;
}

/*
 * Answer an incoming call 
 */
static int answer(int card, unsigned long channel)
{
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      if(setup_buffers(card, channel+1)) {
            hangup(card, channel+1);
            return -ENOBUFS;
      }

      indicate_status(card, ISDN_STAT_BCONN,channel,NULL);
      pr_debug("%s: Answered incoming call on channel %lu\n",
            sc_adapter[card]->devicename, channel+1);
      return 0;
}

/*
 * Hangup up the call on specified channel
 */
static int hangup(int card, unsigned long channel)
{
      int status;

      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      status = sendmessage(card, CEPID, ceReqTypePhy,
                                     ceReqClass1,
                                     ceReqPhyDisconnect,
                                     (unsigned char) channel+1,
                                     0,
                                     NULL);
      pr_debug("%s: Sent HANGUP message to channel %lu\n",
            sc_adapter[card]->devicename, channel+1);
      return status;
}

/*
 * Set the layer 2 protocol (X.25, HDLC, Raw)
 */
static int setl2(int card, unsigned long arg)
{
      int status =0;
      int protocol,channel;

      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }
      protocol = arg >> 8;
      channel = arg & 0xff;
      sc_adapter[card]->channel[channel].l2_proto = protocol;

      /*
       * check that the adapter is also set to the correct protocol
       */
      pr_debug("%s: Sending GetFrameFormat for channel %d\n",
            sc_adapter[card]->devicename, channel+1);
      status = sendmessage(card, CEPID, ceReqTypeCall,
                        ceReqClass0,
                        ceReqCallGetFrameFormat,
                        (unsigned char)channel+1,
                        1,
                        (unsigned int *) protocol);
      if(status) 
            return status;
      return 0;
}

/*
 * Set the layer 3 protocol
 */
static int setl3(int card, unsigned long channel)
{
      int protocol = channel >> 8;

      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      sc_adapter[card]->channel[channel].l3_proto = protocol;
      return 0;
}

static int acceptb(int card, unsigned long channel)
{
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      if(setup_buffers(card, channel+1))
      {
            hangup(card, channel+1);
            return -ENOBUFS;
      }

      pr_debug("%s: B-Channel connection accepted on channel %lu\n",
            sc_adapter[card]->devicename, channel+1);
      indicate_status(card, ISDN_STAT_BCONN, channel, NULL);
      return 0;
}

static int clreaz(int card, unsigned long arg)
{
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      strcpy(sc_adapter[card]->channel[arg].eazlist, "");
      sc_adapter[card]->channel[arg].eazclear = 1;
      pr_debug("%s: EAZ List cleared for channel %lu\n",
            sc_adapter[card]->devicename, arg+1);
      return 0;
}

static int seteaz(int card, unsigned long arg, char *num)
{
      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      strcpy(sc_adapter[card]->channel[arg].eazlist, num);
      sc_adapter[card]->channel[arg].eazclear = 0;
      pr_debug("%s: EAZ list for channel %lu set to: %s\n",
            sc_adapter[card]->devicename, arg+1,
            sc_adapter[card]->channel[arg].eazlist);
      return 0;
}

int reset(int card)
{
      unsigned long flags;

      if(!IS_VALID_CARD(card)) {
            pr_debug("Invalid param: %d is not a valid card id\n", card);
            return -ENODEV;
      }

      indicate_status(card, ISDN_STAT_STOP, 0, NULL);

      if(sc_adapter[card]->EngineUp) {
            del_timer(&sc_adapter[card]->stat_timer);
      }

      sc_adapter[card]->EngineUp = 0;

      spin_lock_irqsave(&sc_adapter[card]->lock, flags);
      init_timer(&sc_adapter[card]->reset_timer);
      sc_adapter[card]->reset_timer.function = sc_check_reset;
      sc_adapter[card]->reset_timer.data = card;
      sc_adapter[card]->reset_timer.expires = jiffies + CHECKRESET_TIME;
      add_timer(&sc_adapter[card]->reset_timer);
      spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);

      outb(0x1,sc_adapter[card]->ioport[SFT_RESET]);

      pr_debug("%s: Adapter Reset\n", sc_adapter[card]->devicename);
      return 0;
}

void flushreadfifo (int card)
{
      while(inb(sc_adapter[card]->ioport[FIFO_STATUS]) & RF_HAS_DATA)
            inb(sc_adapter[card]->ioport[FIFO_READ]);
}

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