orinoco.c

linux-2.4.29操作系统的源码

	if (priv->has_sensitivity) {
		err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFSYSTEMSCALE,
					   priv->ap_density);
		if (err) {
			printk(KERN_WARNING "%s: Error %d setting SYSTEMSCALE.  "
			       "Disabling sensitivity control\n", dev->name, err);

			priv->has_sensitivity = 0;
		}
	}

	/* Set RTS threshold */
	err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFRTSTHRESHOLD, priv->rts_thresh);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting RTS threshold\n", dev->name, err);
		return err;
	}

	/* Set fragmentation threshold or MWO robustness */
	if (priv->has_mwo)
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFMWOROBUST_AGERE,
					   priv->mwo_robust);
	else
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFFRAGMENTATIONTHRESHOLD,
					   priv->frag_thresh);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting framentation\n", dev->name, err);
		return err;
	}

	/* Set bitrate */
	err = __orinoco_hw_set_bitrate(priv);
	if (err) {
		printk(KERN_ERR "%s: Error %d setting bitrate\n", dev->name, err);
		return err;
	}

	/* Set power management */
	if (priv->has_pm) {
		err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFPMENABLED,
					   priv->pm_on);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting up PM\n",
			       dev->name, err);
			return err;
		}

		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFMULTICASTRECEIVE,
					   priv->pm_mcast);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting up PM\n",
			       dev->name, err);
			return err;
		}
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFMAXSLEEPDURATION,
					   priv->pm_period);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting up PM\n",
			       dev->name, err);
			return err;
		}
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFPMHOLDOVERDURATION,
					   priv->pm_timeout);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting up PM\n",
			       dev->name, err);
			return err;
		}
	}

	/* Set preamble - only for Symbol so far... */
	if (priv->has_preamble) {
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFPREAMBLE_SYMBOL,
					   priv->preamble);
		if (err) {
			printk(KERN_ERR "%s: Error %d setting preamble\n",
			       dev->name, err);
			return err;
		}
	}

	/* Set up encryption */
	if (priv->has_wep) {
		err = __orinoco_hw_setup_wep(priv);
		if (err) {
			printk(KERN_ERR "%s: Error %d activating WEP\n",
			       dev->name, err);
			return err;
		}
	}

	/* Set promiscuity / multicast*/
	priv->promiscuous = 0;
	priv->mc_count = 0;
	__orinoco_set_multicast_list(dev); /* FIXME: what about the xmit_lock */

	return 0;
}

/* xyzzy */
static int orinoco_reconfigure(struct net_device *dev)
{
	struct orinoco_private *priv = dev->priv;
	struct hermes *hw = &priv->hw;
	unsigned long flags;
	int err = 0;

	if (priv->broken_disableport) {
		schedule_work(&priv->reset_work);
		return 0;
	}

	err = orinoco_lock(priv, &flags);
	if (err)
		return err;

		
	err = hermes_disable_port(hw, 0);
	if (err) {
		printk(KERN_WARNING "%s: Unable to disable port while reconfiguring card\n",
		       dev->name);
		priv->broken_disableport = 1;
		goto out;
	}

	err = __orinoco_program_rids(dev);
	if (err) {
		printk(KERN_WARNING "%s: Unable to reconfigure card\n",
		       dev->name);
		goto out;
	}

	err = hermes_enable_port(hw, 0);
	if (err) {
		printk(KERN_WARNING "%s: Unable to enable port while reconfiguring card\n",
		       dev->name);
		goto out;
	}

 out:
	if (err) {
		printk(KERN_WARNING "%s: Resetting instead...\n", dev->name);
		schedule_work(&priv->reset_work);
		err = 0;
	}

	orinoco_unlock(priv, &flags);
	return err;

}

/* This must be called from user context, without locks held - use
 * schedule_work() */
static void orinoco_reset(struct net_device *dev)
{
	struct orinoco_private *priv = dev->priv;
	struct hermes *hw = &priv->hw;
	int err;
	unsigned long flags;

	err = orinoco_lock(priv, &flags);
	if (err)
		/* When the hardware becomes available again, whatever
		 * detects that is responsible for re-initializing
		 * it. So no need for anything further*/
		return;

	netif_stop_queue(dev);

	/* Shut off interrupts.  Depending on what state the hardware
	 * is in, this might not work, but we'll try anyway */
	hermes_set_irqmask(hw, 0);
	hermes_write_regn(hw, EVACK, 0xffff);

	priv->hw_unavailable++;
	priv->last_linkstatus = 0xffff; /* firmware will have to reassociate */
	priv->connected = 0;

	orinoco_unlock(priv, &flags);

	if (priv->hard_reset)
		err = (*priv->hard_reset)(priv);
	if (err) {
		printk(KERN_ERR "%s: orinoco_reset: Error %d performing hard reset\n",
		       dev->name, err);
		/* FIXME: shutdown of some sort */
		return;
	}

	err = orinoco_reinit_firmware(dev);
	if (err) {
		printk(KERN_ERR "%s: orinoco_reset: Error %d re-initializing firmware\n",
		       dev->name, err);
		return;
	}

	spin_lock_irq(&priv->lock); /* This has to be called from user context */

	priv->hw_unavailable--;

	/* priv->open or priv->hw_unavailable might have changed while
	 * we dropped the lock */
	if (priv->open && (! priv->hw_unavailable)) {
		err = __orinoco_up(dev);
		if (err) {
			printk(KERN_ERR "%s: orinoco_reset: Error %d reenabling card\n",
			       dev->name, err);
		} else
			dev->trans_start = jiffies;
	}

	spin_unlock_irq(&priv->lock);

	return;
}

/********************************************************************/
/* Internal helper functions                                        */
/********************************************************************/

static inline void
set_port_type(struct orinoco_private *priv)
{
	switch (priv->iw_mode) {
	case IW_MODE_INFRA:
		priv->port_type = 1;
		priv->createibss = 0;
		break;
	case IW_MODE_ADHOC:
		if (priv->prefer_port3) {
			priv->port_type = 3;
			priv->createibss = 0;
		} else {
			priv->port_type = priv->ibss_port;
			priv->createibss = 1;
		}
		break;
	default:
		printk(KERN_ERR "%s: Invalid priv->iw_mode in set_port_type()\n",
		       priv->ndev->name);
	}
}

/* Does the frame have a SNAP header indicating it should be
 * de-encapsulated to Ethernet-II? */
static inline int
is_ethersnap(struct header_struct *hdr)
{
	/* We de-encapsulate all packets which, a) have SNAP headers
	 * (i.e. SSAP=DSAP=0xaa and CTRL=0x3 in the 802.2 LLC header
	 * and where b) the OUI of the SNAP header is 00:00:00 or
	 * 00:00:f8 - we need both because different APs appear to use
	 * different OUIs for some reason */
	return (memcmp(&hdr->dsap, &encaps_hdr, 5) == 0)
		&& ( (hdr->oui[2] == 0x00) || (hdr->oui[2] == 0xf8) );
}

static void
orinoco_set_multicast_list(struct net_device *dev)
{
	struct orinoco_private *priv = dev->priv;
	unsigned long flags;

	if (orinoco_lock(priv, &flags) != 0) {
		printk(KERN_DEBUG "%s: orinoco_set_multicast_list() "
		       "called when hw_unavailable\n", dev->name);
		return;
	}

	__orinoco_set_multicast_list(dev);
	orinoco_unlock(priv, &flags);
}

/********************************************************************/
/* Hardware control functions                                       */
/********************************************************************/


static int __orinoco_hw_set_bitrate(struct orinoco_private *priv)
{
	hermes_t *hw = &priv->hw;
	int err = 0;

	if (priv->bitratemode >= BITRATE_TABLE_SIZE) {
		printk(KERN_ERR "%s: BUG: Invalid bitrate mode %d\n",
		       priv->ndev->name, priv->bitratemode);
		return -EINVAL;
	}

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFTXRATECONTROL,
					   bitrate_table[priv->bitratemode].agere_txratectrl);
		break;
	case FIRMWARE_TYPE_INTERSIL:
	case FIRMWARE_TYPE_SYMBOL:
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFTXRATECONTROL,
					   bitrate_table[priv->bitratemode].intersil_txratectrl);
		break;
	default:
		BUG();
	}

	return err;
}


static int __orinoco_hw_setup_wep(struct orinoco_private *priv)
{
	hermes_t *hw = &priv->hw;
	int err = 0;
	int	master_wep_flag;
	int	auth_flag;

	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE: /* Agere style WEP */
		if (priv->wep_on) {
			err = hermes_write_wordrec(hw, USER_BAP,
						   HERMES_RID_CNFTXKEY_AGERE,
						   priv->tx_key);
			if (err)
				return err;
			
			err = HERMES_WRITE_RECORD(hw, USER_BAP,
						  HERMES_RID_CNFWEPKEYS_AGERE,
						  &priv->keys);
			if (err)
				return err;
		}
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFWEPENABLED_AGERE,
					   priv->wep_on);
		if (err)
			return err;
		break;

	case FIRMWARE_TYPE_INTERSIL: /* Intersil style WEP */
	case FIRMWARE_TYPE_SYMBOL: /* Symbol style WEP */
		master_wep_flag = 0;		/* Off */
		if (priv->wep_on) {
			int keylen;
			int i;

			/* Fudge around firmware weirdness */
			keylen = le16_to_cpu(priv->keys[priv->tx_key].len);
			
			/* Write all 4 keys */
			for(i = 0; i < ORINOCO_MAX_KEYS; i++) {
/*  				int keylen = le16_to_cpu(priv->keys[i].len); */
				
				if (keylen > LARGE_KEY_SIZE) {
					printk(KERN_ERR "%s: BUG: Key %d has oversize length %d.\n",
					       priv->ndev->name, i, keylen);
					return -E2BIG;
				}

				err = hermes_write_ltv(hw, USER_BAP,
						       HERMES_RID_CNFDEFAULTKEY0 + i,
						       HERMES_BYTES_TO_RECLEN(keylen),
						       priv->keys[i].data);
				if (err)
					return err;
			}

			/* Write the index of the key used in transmission */
			err = hermes_write_wordrec(hw, USER_BAP, HERMES_RID_CNFWEPDEFAULTKEYID,
						   priv->tx_key);
			if (err)
				return err;
			
			if (priv->wep_restrict) {
				auth_flag = 2;
				master_wep_flag = 3;
			} else {
				/* Authentication is where Intersil and Symbol
				 * firmware differ... */
				auth_flag = 1;
				if (priv->firmware_type == FIRMWARE_TYPE_SYMBOL)
					master_wep_flag = 3; /* Symbol */ 
				else 
					master_wep_flag = 1; /* Intersil */
			}


			err = hermes_write_wordrec(hw, USER_BAP,
						   HERMES_RID_CNFAUTHENTICATION, auth_flag);
			if (err)
				return err;
		}
		
		/* Master WEP setting : on/off */
		err = hermes_write_wordrec(hw, USER_BAP,
					   HERMES_RID_CNFWEPFLAGS_INTERSIL,
					   master_wep_flag);
		if (err)
			return err;	

		break;