orinoco.c

LINUX 2.6.17.4的源码

			priv->promiscuous = promisc;
	}

	if (! promisc && (mc_count || priv->mc_count) ) {
		struct dev_mc_list *p = dev->mc_list;
		struct hermes_multicast mclist;
		int i;

		for (i = 0; i < mc_count; i++) {
			/* paranoia: is list shorter than mc_count? */
			BUG_ON(! p);
			/* paranoia: bad address size in list? */
			BUG_ON(p->dmi_addrlen != ETH_ALEN);
			
			memcpy(mclist.addr[i], p->dmi_addr, ETH_ALEN);
			p = p->next;
		}
		
		if (p)
			printk(KERN_WARNING "%s: Multicast list is "
			       "longer than mc_count\n", dev->name);

		err = hermes_write_ltv(hw, USER_BAP, HERMES_RID_CNFGROUPADDRESSES,
				       HERMES_BYTES_TO_RECLEN(priv->mc_count * ETH_ALEN),
				       &mclist);
		if (err)
			printk(KERN_ERR "%s: Error %d setting multicast list.\n",
			       dev->name, err);
		else
			priv->mc_count = mc_count;
	}

	/* Since we can set the promiscuous flag when it wasn't asked
	   for, make sure the net_device knows about it. */
	if (priv->promiscuous)
		dev->flags |= IFF_PROMISC;
	else
		dev->flags &= ~IFF_PROMISC;
}

/* 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 = netdev_priv(dev);
	struct hermes *hw = &priv->hw;
	int err;
	unsigned long flags;

	if (orinoco_lock(priv, &flags) != 0)
		/* 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 */
	netif_carrier_off(dev);

	orinoco_unlock(priv, &flags);

 	/* Scanning support: Cleanup of driver struct */
	kfree(priv->scan_result);
	priv->scan_result = NULL;
	priv->scan_inprogress = 0;

	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);
			goto disable;
		}
	}

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

	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;
 disable:
	hermes_set_irqmask(hw, 0);
	netif_device_detach(dev);
	printk(KERN_ERR "%s: Device has been disabled!\n", dev->name);
}

/********************************************************************/
/* Interrupt handler                                                */
/********************************************************************/

static void __orinoco_ev_tick(struct net_device *dev, hermes_t *hw)
{
	printk(KERN_DEBUG "%s: TICK\n", dev->name);
}

static void __orinoco_ev_wterr(struct net_device *dev, hermes_t *hw)
{
	/* This seems to happen a fair bit under load, but ignoring it
	   seems to work fine...*/
	printk(KERN_DEBUG "%s: MAC controller error (WTERR). Ignoring.\n",
	       dev->name);
}

irqreturn_t orinoco_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct net_device *dev = (struct net_device *)dev_id;
	struct orinoco_private *priv = netdev_priv(dev);
	hermes_t *hw = &priv->hw;
	int count = MAX_IRQLOOPS_PER_IRQ;
	u16 evstat, events;
	/* These are used to detect a runaway interrupt situation */
	/* If we get more than MAX_IRQLOOPS_PER_JIFFY iterations in a jiffy,
	 * we panic and shut down the hardware */
	static int last_irq_jiffy = 0; /* jiffies value the last time
					* we were called */
	static int loops_this_jiffy = 0;
	unsigned long flags;

	if (orinoco_lock(priv, &flags) != 0) {
		/* If hw is unavailable - we don't know if the irq was
		 * for us or not */
		return IRQ_HANDLED;
	}

	evstat = hermes_read_regn(hw, EVSTAT);
	events = evstat & hw->inten;
	if (! events) {
		orinoco_unlock(priv, &flags);
		return IRQ_NONE;
	}
	
	if (jiffies != last_irq_jiffy)
		loops_this_jiffy = 0;
	last_irq_jiffy = jiffies;

	while (events && count--) {
		if (++loops_this_jiffy > MAX_IRQLOOPS_PER_JIFFY) {
			printk(KERN_WARNING "%s: IRQ handler is looping too "
			       "much! Resetting.\n", dev->name);
			/* Disable interrupts for now */
			hermes_set_irqmask(hw, 0);
			schedule_work(&priv->reset_work);
			break;
		}

		/* Check the card hasn't been removed */
		if (! hermes_present(hw)) {
			DEBUG(0, "orinoco_interrupt(): card removed\n");
			break;
		}

		if (events & HERMES_EV_TICK)
			__orinoco_ev_tick(dev, hw);
		if (events & HERMES_EV_WTERR)
			__orinoco_ev_wterr(dev, hw);
		if (events & HERMES_EV_INFDROP)
			__orinoco_ev_infdrop(dev, hw);
		if (events & HERMES_EV_INFO)
			__orinoco_ev_info(dev, hw);
		if (events & HERMES_EV_RX)
			__orinoco_ev_rx(dev, hw);
		if (events & HERMES_EV_TXEXC)
			__orinoco_ev_txexc(dev, hw);
		if (events & HERMES_EV_TX)
			__orinoco_ev_tx(dev, hw);
		if (events & HERMES_EV_ALLOC)
			__orinoco_ev_alloc(dev, hw);
		
		hermes_write_regn(hw, EVACK, evstat);

		evstat = hermes_read_regn(hw, EVSTAT);
		events = evstat & hw->inten;
	};

	orinoco_unlock(priv, &flags);
	return IRQ_HANDLED;
}

/********************************************************************/
/* Initialization                                                   */
/********************************************************************/

struct comp_id {
	u16 id, variant, major, minor;
} __attribute__ ((packed));

static inline fwtype_t determine_firmware_type(struct comp_id *nic_id)
{
	if (nic_id->id < 0x8000)
		return FIRMWARE_TYPE_AGERE;
	else if (nic_id->id == 0x8000 && nic_id->major == 0)
		return FIRMWARE_TYPE_SYMBOL;
	else
		return FIRMWARE_TYPE_INTERSIL;
}

/* Set priv->firmware type, determine firmware properties */
static int determine_firmware(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	hermes_t *hw = &priv->hw;
	int err;
	struct comp_id nic_id, sta_id;
	unsigned int firmver;
	char tmp[SYMBOL_MAX_VER_LEN+1];

	/* Get the hardware version */
	err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_NICID, &nic_id);
	if (err) {
		printk(KERN_ERR "%s: Cannot read hardware identity: error %d\n",
		       dev->name, err);
		return err;
	}

	le16_to_cpus(&nic_id.id);
	le16_to_cpus(&nic_id.variant);
	le16_to_cpus(&nic_id.major);
	le16_to_cpus(&nic_id.minor);
	printk(KERN_DEBUG "%s: Hardware identity %04x:%04x:%04x:%04x\n",
	       dev->name, nic_id.id, nic_id.variant,
	       nic_id.major, nic_id.minor);

	priv->firmware_type = determine_firmware_type(&nic_id);

	/* Get the firmware version */
	err = HERMES_READ_RECORD(hw, USER_BAP, HERMES_RID_STAID, &sta_id);
	if (err) {
		printk(KERN_ERR "%s: Cannot read station identity: error %d\n",
		       dev->name, err);
		return err;
	}

	le16_to_cpus(&sta_id.id);
	le16_to_cpus(&sta_id.variant);
	le16_to_cpus(&sta_id.major);
	le16_to_cpus(&sta_id.minor);
	printk(KERN_DEBUG "%s: Station identity  %04x:%04x:%04x:%04x\n",
	       dev->name, sta_id.id, sta_id.variant,
	       sta_id.major, sta_id.minor);

	switch (sta_id.id) {
	case 0x15:
		printk(KERN_ERR "%s: Primary firmware is active\n",
		       dev->name);
		return -ENODEV;
	case 0x14b:
		printk(KERN_ERR "%s: Tertiary firmware is active\n",
		       dev->name);
		return -ENODEV;
	case 0x1f:	/* Intersil, Agere, Symbol Spectrum24 */
	case 0x21:	/* Symbol Spectrum24 Trilogy */
		break;
	default:
		printk(KERN_NOTICE "%s: Unknown station ID, please report\n",
		       dev->name);
		break;
	}

	/* Default capabilities */
	priv->has_sensitivity = 1;
	priv->has_mwo = 0;
	priv->has_preamble = 0;
	priv->has_port3 = 1;
	priv->has_ibss = 1;
	priv->has_wep = 0;
	priv->has_big_wep = 0;

	/* Determine capabilities from the firmware version */
	switch (priv->firmware_type) {
	case FIRMWARE_TYPE_AGERE:
		/* Lucent Wavelan IEEE, Lucent Orinoco, Cabletron RoamAbout,
		   ELSA, Melco, HP, IBM, Dell 1150, Compaq 110/210 */
		snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
			 "Lucent/Agere %d.%02d", sta_id.major, sta_id.minor);

		firmver = ((unsigned long)sta_id.major << 16) | sta_id.minor;

		priv->has_ibss = (firmver >= 0x60006);
		priv->has_wep = (firmver >= 0x40020);
		priv->has_big_wep = 1; /* FIXME: this is wrong - how do we tell
					  Gold cards from the others? */
		priv->has_mwo = (firmver >= 0x60000);
		priv->has_pm = (firmver >= 0x40020); /* Don't work in 7.52 ? */
		priv->ibss_port = 1;
		priv->has_hostscan = (firmver >= 0x8000a);
		priv->broken_monitor = (firmver >= 0x80000);

		/* Tested with Agere firmware :
		 *	1.16 ; 4.08 ; 4.52 ; 6.04 ; 6.16 ; 7.28 => Jean II
		 * Tested CableTron firmware : 4.32 => Anton */
		break;
	case FIRMWARE_TYPE_SYMBOL:
		/* Symbol , 3Com AirConnect, Intel, Ericsson WLAN */
		/* Intel MAC : 00:02:B3:* */
		/* 3Com MAC : 00:50:DA:* */
		memset(tmp, 0, sizeof(tmp));
		/* Get the Symbol firmware version */
		err = hermes_read_ltv(hw, USER_BAP,
				      HERMES_RID_SECONDARYVERSION_SYMBOL,
				      SYMBOL_MAX_VER_LEN, NULL, &tmp);
		if (err) {
			printk(KERN_WARNING
			       "%s: Error %d reading Symbol firmware info. Wildly guessing capabilities...\n",
			       dev->name, err);
			firmver = 0;
			tmp[0] = '\0';
		} else {
			/* The firmware revision is a string, the format is
			 * something like : "V2.20-01".
			 * Quick and dirty parsing... - Jean II
			 */
			firmver = ((tmp[1] - '0') << 16) | ((tmp[3] - '0') << 12)
				| ((tmp[4] - '0') << 8) | ((tmp[6] - '0') << 4)
				| (tmp[7] - '0');

			tmp[SYMBOL_MAX_VER_LEN] = '\0';
		}

		snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
			 "Symbol %s", tmp);

		priv->has_ibss = (firmver >= 0x20000);
		priv->has_wep = (firmver >= 0x15012);
		priv->has_big_wep = (firmver >= 0x20000);
		priv->has_pm = (firmver >= 0x20000 && firmver < 0x22000) || 
			       (firmver >= 0x29000 && firmver < 0x30000) ||
			       firmver >= 0x31000;
		priv->has_preamble = (firmver >= 0x20000);
		priv->ibss_port = 4;
 		priv->broken_disableport = (firmver == 0x25013) ||
 					   (firmver >= 0x30000 && firmver <= 0x31000);
		priv->has_hostscan = (firmver >= 0x31001) ||
				     (firmver >= 0x29057 && firmver < 0x30000);
		/* Tested with Intel firmware : 0x20015 => Jean II */
		/* Tested with 3Com firmware : 0x15012 & 0x22001 => Jean II */
		break;
	case FIRMWARE_TYPE_INTERSIL:
		/* D-Link, Linksys, Adtron, ZoomAir, and many others...
		 * Samsung, Compaq 100/200 and Proxim are slightly
		 * different and less well tested */
		/* D-Link MAC : 00:40:05:* */
		/* Addtron MAC : 00:90:D1:* */
		snprintf(priv->fw_name, sizeof(priv->fw_name) - 1,
			 "Intersil %d.%d.%d", sta_id.major, sta_id.minor,
			 sta_id.variant);

		firmver = ((unsigned long)sta_id.major << 16) |
			((unsigned long)sta_id.minor << 8) | sta_id.variant;

		priv->has_ibss = (firmver >= 0x000700); /* FIXME */
		priv->has_big_wep = priv->has_wep = (firmver >= 0x000800);
		priv->has_pm = (firmver >= 0x000700);
		priv->has_hostscan = (firmver >= 0x010301);

		if (firmver >= 0x000800)
			priv->ibss_port = 0;
		else {
			printk(KERN_NOTICE "%s: Intersil firmware earlier "
			       "than v0.8.x - several features not supported\n",
			       dev->name);
			priv->ibss_port = 1;
		}
		break;
	}
	printk(KERN_DEBUG "%s: Firmware determined as %s\n", dev->name,
	       priv->fw_name);

	return 0;
}

static int orinoco_init(struct net_device *dev)
{
	struct orinoco_private *priv = netdev_priv(dev);
	hermes_t *hw = &priv->hw;
	int err = 0;
	struct hermes_idstring nickbuf;
	u16 reclen;
	int len;

	TRACE_ENTER(dev->name);

	/* No need to lock, the hw_unavailable flag is already set in
	 * alloc_orinocodev() */
	priv->nicbuf_size = IEEE80211_FRAME_LEN + ETH_HLEN;

	/* Initialize the firmware */
	err = orinoco_reinit_firmware(dev);
	if (err != 0) {
		printk(KERN_ERR "%s: failed to initialize firmware (err = %d)\n",
		       dev->name, err);
		goto out;
	}

	err = determine_firmware(dev);
	if (err != 0) {
		printk(KERN_ERR "%s: Incompatible firmware, aborting\n",
		       dev->name);
		goto out;
	}

	if (priv->has_port3)
		printk(KERN_DEBUG "%s: Ad-hoc demo mode supported\n", dev->name);
	if (priv->has_ibss)
		printk(KERN_DEBUG "%s: IEEE standard IBSS ad-hoc mode supported\n",
		       dev->name);
	if (priv->has_wep) {
		printk(KERN_DEBUG "%s: WEP supported, ", dev->name);
		if (priv->has_big_wep)
			printk("104-bit key\n");
		else
			printk("40-bit key\n");
	}

	/* Get the MAC address */
	err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNMACADDR,
			      ETH_ALEN, NULL, dev->dev_addr);
	if (err) {
		printk(KERN_WARNING "%s: failed to read MAC address!\n",
		       dev->name);
		goto out;
	}

	printk(KERN_DEBUG "%s: MAC address %02X:%02X:%02X:%02X:%02X:%02X\n",
	       dev->name, dev->dev_addr[0], dev->dev_addr[1],
	       dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
	       dev->dev_addr[5]);

	/* Get the station name */
	err = hermes_read_ltv(hw, USER_BAP, HERMES_RID_CNFOWNNAME,
			      sizeof(nickbuf), &reclen, &nickbuf);
	if (err) {
		printk(KERN_ERR "%s: failed to read station name\n",
		       dev->name);
		goto out;
	}
	if (nickbuf.len)
		len = min(IW_ESSID_MAX_SIZE, (int)le16_to_cpu(nickbuf