atmel.c

LINUX 2.6.17.4的源码

					| IW_QUAL_LEVEL_INVALID
					| IW_QUAL_NOISE_INVALID;
		priv->wstats.miss.beacon = 0;
	}

	return &priv->wstats;
}

static int atmel_change_mtu(struct net_device *dev, int new_mtu)
{
        if ((new_mtu < 68) || (new_mtu > 2312))
                return -EINVAL;
        dev->mtu = new_mtu;
        return 0;
}

static int atmel_set_mac_address(struct net_device *dev, void *p)
{
	struct sockaddr *addr = p;

        memcpy (dev->dev_addr, addr->sa_data, dev->addr_len);
	return atmel_open(dev);
}

EXPORT_SYMBOL(atmel_open);

int atmel_open(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);
	int i, channel;

	/* any scheduled timer is no longer needed and might screw things up.. */
	del_timer_sync(&priv->management_timer);

	/* Interrupts will not touch the card once in this state... */
	priv->station_state = STATION_STATE_DOWN;

	if (priv->new_SSID_size) {
		memcpy(priv->SSID, priv->new_SSID, priv->new_SSID_size);
		priv->SSID_size = priv->new_SSID_size;
		priv->new_SSID_size = 0;
	}
	priv->BSS_list_entries = 0;

	priv->AuthenticationRequestRetryCnt = 0;
	priv->AssociationRequestRetryCnt = 0;
	priv->ReAssociationRequestRetryCnt = 0;
	priv->CurrentAuthentTransactionSeqNum = 0x0001;
	priv->ExpectedAuthentTransactionSeqNum = 0x0002;

	priv->site_survey_state = SITE_SURVEY_IDLE;
	priv->station_is_associated = 0;

	if (!reset_atmel_card(dev))
		return -EAGAIN;

	if (priv->config_reg_domain) {
		priv->reg_domain = priv->config_reg_domain;
		atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS, priv->reg_domain);
	} else {
		priv->reg_domain = atmel_get_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS);
		for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
			if (priv->reg_domain == channel_table[i].reg_domain)
				break;
		if (i == sizeof(channel_table)/sizeof(channel_table[0])) {
			priv->reg_domain = REG_DOMAIN_MKK1;
			printk(KERN_ALERT "%s: failed to get regulatory domain: assuming MKK1.\n", dev->name);
		}
	}

	if ((channel = atmel_validate_channel(priv, priv->channel)))
		priv->channel = channel;

	/* this moves station_state on.... */
	atmel_scan(priv, 1);

	atmel_set_gcr(priv->dev, GCR_ENINT); /* enable interrupts */
	return 0;
}

static int atmel_close(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Send event to userspace that we are disassociating */
	if (priv->station_state == STATION_STATE_READY) {
		union iwreq_data wrqu;

		wrqu.data.length = 0;
		wrqu.data.flags = 0;
		wrqu.ap_addr.sa_family = ARPHRD_ETHER;
		memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
		wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
	}

	atmel_enter_state(priv, STATION_STATE_DOWN);

	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(dev, GCR, 0x0060);
	atmel_write16(dev, GCR, 0x0040);
	return 0;
}

static int atmel_validate_channel(struct atmel_private *priv, int channel)
{
	/* check that channel is OK, if so return zero,
	   else return suitable default channel */
	int i;

	for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
		if (priv->reg_domain == channel_table[i].reg_domain) {
			if (channel >= channel_table[i].min &&
			    channel <= channel_table[i].max)
				return 0;
			else
				return channel_table[i].min;
		}
	return 0;
}

static int atmel_proc_output (char *buf, struct atmel_private *priv)
{
	int i;
	char *p = buf;
	char *s, *r, *c;

	p += sprintf(p, "Driver version:\t\t%d.%d\n",
		     DRIVER_MAJOR, DRIVER_MINOR);

	if (priv->station_state != STATION_STATE_DOWN) {
		p += sprintf(p, "Firmware version:\t%d.%d build %d\n"
				"Firmware location:\t",
			     priv->host_info.major_version,
			     priv->host_info.minor_version,
			     priv->host_info.build_version);

		if (priv->card_type != CARD_TYPE_EEPROM)
			p += sprintf(p, "on card\n");
		else if (priv->firmware)
			p += sprintf(p, "%s loaded by host\n",
				     priv->firmware_id);
		else
			p += sprintf(p, "%s loaded by hotplug\n",
				     priv->firmware_id);

		switch (priv->card_type) {
		case CARD_TYPE_PARALLEL_FLASH: c = "Parallel flash"; break;
		case CARD_TYPE_SPI_FLASH: c = "SPI flash\n"; break;
		case CARD_TYPE_EEPROM: c = "EEPROM"; break;
		default: c = "<unknown>";
		}

		r = "<unknown>";
		for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
			if (priv->reg_domain == channel_table[i].reg_domain)
				r = channel_table[i].name;

		p += sprintf(p, "MAC memory type:\t%s\n", c);
		p += sprintf(p, "Regulatory domain:\t%s\n", r);
		p += sprintf(p, "Host CRC checking:\t%s\n",
			     priv->do_rx_crc ? "On" : "Off");
		p += sprintf(p, "WPA-capable firmware:\t%s\n",
			     priv->use_wpa ? "Yes" : "No");
	}

	switch(priv->station_state) {
	case STATION_STATE_SCANNING: s = "Scanning"; break;
	case STATION_STATE_JOINNING: s = "Joining"; break;
	case STATION_STATE_AUTHENTICATING: s = "Authenticating"; break;
	case STATION_STATE_ASSOCIATING: s = "Associating"; break;
	case STATION_STATE_READY: s = "Ready"; break;
	case STATION_STATE_REASSOCIATING: s = "Reassociating"; break;
	case STATION_STATE_MGMT_ERROR: s = "Management error"; break;
	case STATION_STATE_DOWN: s = "Down"; break;
	default: s = "<unknown>";
	}

	p += sprintf(p, "Current state:\t\t%s\n", s);
	return p - buf;
}

static int atmel_read_proc(char *page, char **start, off_t off,
			   int count, int *eof, void *data)
{
        struct atmel_private *priv = data;
	int len = atmel_proc_output (page, priv);
        if (len <= off+count) *eof = 1;
        *start = page + off;
        len -= off;
        if (len>count) len = count;
        if (len<0) len = 0;
        return len;
}

struct net_device *init_atmel_card(unsigned short irq, unsigned long port,
				   const AtmelFWType fw_type,
				   struct device *sys_dev,
				   int (*card_present)(void *), void *card)
{
	struct proc_dir_entry *ent;
	struct net_device *dev;
	struct atmel_private *priv;
	int rc;

	/* Create the network device object. */
        dev = alloc_etherdev(sizeof(*priv));
        if (!dev) {
		printk(KERN_ERR "atmel: Couldn't alloc_etherdev\n");
		return NULL;
        }
	if (dev_alloc_name(dev, dev->name) < 0) {
		printk(KERN_ERR "atmel: Couldn't get name!\n");
		goto err_out_free;
	}

	priv = netdev_priv(dev);
	priv->dev = dev;
	priv->sys_dev = sys_dev;
	priv->present_callback = card_present;
	priv->card = card;
	priv->firmware = NULL;
	priv->firmware_id[0] = '\0';
	priv->firmware_type = fw_type;
	if (firmware) /* module parameter */
		strcpy(priv->firmware_id, firmware);
	priv->bus_type = card_present ? BUS_TYPE_PCCARD : BUS_TYPE_PCI;
	priv->station_state = STATION_STATE_DOWN;
	priv->do_rx_crc = 0;
	/* For PCMCIA cards, some chips need CRC, some don't
	   so we have to probe. */
	if (priv->bus_type == BUS_TYPE_PCCARD) {
		priv->probe_crc = 1;
		priv->crc_ok_cnt = priv->crc_ko_cnt = 0;
	} else
		priv->probe_crc = 0;
	memset(&priv->stats, 0, sizeof(priv->stats));
	memset(&priv->wstats, 0, sizeof(priv->wstats));
	priv->last_qual = jiffies;
	priv->last_beacon_timestamp = 0;
	memset(priv->frag_source, 0xff, sizeof(priv->frag_source));
	memset(priv->BSSID, 0, 6);
	priv->CurrentBSSID[0] = 0xFF; /* Initialize to something invalid.... */
	priv->station_was_associated = 0;

	priv->last_survey = jiffies;
	priv->preamble = LONG_PREAMBLE;
	priv->operating_mode = IW_MODE_INFRA;
	priv->connect_to_any_BSS = 0;
	priv->config_reg_domain = 0;
	priv->reg_domain = 0;
	priv->tx_rate = 3;
	priv->auto_tx_rate = 1;
	priv->channel = 4;
	priv->power_mode = 0;
	priv->SSID[0] = '\0';
	priv->SSID_size = 0;
	priv->new_SSID_size = 0;
	priv->frag_threshold = 2346;
	priv->rts_threshold = 2347;
	priv->short_retry = 7;
	priv->long_retry = 4;

	priv->wep_is_on = 0;
	priv->default_key = 0;
	priv->encryption_level = 0;
	priv->exclude_unencrypted = 0;
	priv->group_cipher_suite = priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
	priv->use_wpa = 0;
	memset(priv->wep_keys, 0, sizeof(priv->wep_keys));
	memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));

	priv->default_beacon_period = priv->beacon_period = 100;
	priv->listen_interval = 1;

	init_timer(&priv->management_timer);
	spin_lock_init(&priv->irqlock);
	spin_lock_init(&priv->timerlock);
	priv->management_timer.function = atmel_management_timer;
	priv->management_timer.data = (unsigned long) dev;

	dev->open = atmel_open;
	dev->stop = atmel_close;
	dev->change_mtu = atmel_change_mtu;
	dev->set_mac_address = atmel_set_mac_address;
	dev->hard_start_xmit = start_tx;
	dev->get_stats = atmel_get_stats;
	dev->wireless_handlers = (struct iw_handler_def *)&atmel_handler_def;
	dev->do_ioctl = atmel_ioctl;
	dev->irq = irq;
	dev->base_addr = port;

	SET_NETDEV_DEV(dev, sys_dev);

	if ((rc = request_irq(dev->irq, service_interrupt, SA_SHIRQ, dev->name, dev))) {
		printk(KERN_ERR "%s: register interrupt %d failed, rc %d\n", dev->name, irq, rc);
		goto err_out_free;
	}

	if (!request_region(dev->base_addr, 32,
			    priv->bus_type == BUS_TYPE_PCCARD ?  "atmel_cs" : "atmel_pci")) {
		goto err_out_irq;
	}

	if (register_netdev(dev))
		goto err_out_res;

	if (!probe_atmel_card(dev)){
		unregister_netdev(dev);
		goto err_out_res;
	}

	netif_carrier_off(dev);

	ent = create_proc_read_entry ("driver/atmel", 0, NULL, atmel_read_proc, priv);
	if (!ent)
		printk(KERN_WARNING "atmel: unable to create /proc entry.\n");

	printk(KERN_INFO "%s: Atmel at76c50x. Version %d.%d. MAC %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
	       dev->name, DRIVER_MAJOR, DRIVER_MINOR,
	       dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
	       dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5] );

	SET_MODULE_OWNER(dev);
	return dev;

err_out_res:
	release_region( dev->base_addr, 32);
err_out_irq:
	free_irq(dev->irq, dev);
err_out_free:
	free_netdev(dev);
	return NULL;
}

EXPORT_SYMBOL(init_atmel_card);

void stop_atmel_card(struct net_device *dev)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* put a brick on it... */
	if (priv->bus_type == BUS_TYPE_PCCARD)
		atmel_write16(dev, GCR, 0x0060);
	atmel_write16(dev, GCR, 0x0040);

	del_timer_sync(&priv->management_timer);
	unregister_netdev(dev);
	remove_proc_entry("driver/atmel", NULL);
	free_irq(dev->irq, dev);
	kfree(priv->firmware);
	release_region(dev->base_addr, 32);
	free_netdev(dev);
}

EXPORT_SYMBOL(stop_atmel_card);

static int atmel_set_essid(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *dwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Check if we asked for `any' */
	if(dwrq->flags == 0) {
		priv->connect_to_any_BSS = 1;
	} else {
		int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;

		priv->connect_to_any_BSS = 0;

		/* Check the size of the string */
		if (dwrq->length > MAX_SSID_LENGTH + 1)
			 return -E2BIG;
		if (index != 0)
			return -EINVAL;

		memcpy(priv->new_SSID, extra, dwrq->length - 1);
		priv->new_SSID_size = dwrq->length - 1;
	}

	return -EINPROGRESS;
}

static int atmel_get_essid(struct net_device *dev,
			   struct iw_request_info *info,
			   struct iw_point *dwrq,
			   char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Get the current SSID */
	if (priv->new_SSID_size != 0) {
		memcpy(extra, priv->new_SSID, priv->new_SSID_size);
		extra[priv->new_SSID_size] = '\0';
		dwrq->length = priv->new_SSID_size;
	} else {
		memcpy(extra, priv->SSID, priv->SSID_size);
		extra[priv->SSID_size] = '\0';
		dwrq->length = priv->SSID_size;
	}

	dwrq->flags = !priv->connect_to_any_BSS; /* active */

	return 0;
}

static int atmel_get_wap(struct net_device *dev,
			 struct iw_request_info *info,
			 struct sockaddr *awrq,
			 char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);
	memcpy(awrq->sa_data, priv->CurrentBSSID, 6);
	awrq->sa_family = ARPHRD_ETHER;

	return 0;
}

static int atmel_set_encode(struct net_device *dev,
			    struct iw_request_info *info,
			    struct iw_point *dwrq,
			    char *extra)
{
	struct atmel_private *priv = netdev_priv(dev);

	/* Basic checking: do we have a key to set ?
	 * Note : with the new API, it's impossible to get a NULL pointer.
	 * Therefore, we need to check a key size == 0 instead.