wl3501_cs.c

来自「LINUX 2.6.17.4的源码」· C语言 代码 · 共 2,165 行 · 第 1/4 页

		} else {
			sig.size = pktlen + 24 + 4 - 2;
			pdata += 2;
			pktlen -= 2;
			if (pktlen > (254 - sizeof(struct wl3501_tx_hdr) + 6)) {
				tmplen = 254 - sizeof(struct wl3501_tx_hdr) + 6;
				pktlen -= tmplen;
			} else {
				tmplen = pktlen;
				pktlen = 0;
			}
			wl3501_set_to_wla(this, bf + 2 +
					  offsetof(struct wl3501_tx_hdr, addr4),
					  pdata, tmplen);
			pdata += tmplen;
			wl3501_get_from_wla(this, bf, &next, sizeof(next));
			bf = next;
		}
		while (pktlen > 0) {
			if (pktlen > 254) {
				tmplen = 254;
				pktlen -= 254;
			} else {
				tmplen = pktlen;
				pktlen = 0;
			}
			wl3501_set_to_wla(this, bf + 2, pdata, tmplen);
			pdata += tmplen;
			wl3501_get_from_wla(this, bf, &next, sizeof(next));
			bf = next;
		}
		wl3501_set_to_wla(this, sig_bf, &sig, sizeof(sig));
		wl3501_esbq_req(this, &sig_bf);
	}
out:
	return rc;
}

static int wl3501_mgmt_resync(struct wl3501_card *this)
{
	struct wl3501_resync_req sig = {
		.sig_id = WL3501_SIG_RESYNC_REQ,
	};

	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static inline int wl3501_fw_bss_type(struct wl3501_card *this)
{
	return this->net_type == IW_MODE_INFRA ? WL3501_NET_TYPE_INFRA :
						 WL3501_NET_TYPE_ADHOC;
}

static inline int wl3501_fw_cap_info(struct wl3501_card *this)
{
	return this->net_type == IW_MODE_INFRA ? WL3501_MGMT_CAPABILITY_ESS :
						 WL3501_MGMT_CAPABILITY_IBSS;
}

static int wl3501_mgmt_scan(struct wl3501_card *this, u16 chan_time)
{
	struct wl3501_scan_req sig = {
		.sig_id		= WL3501_SIG_SCAN_REQ,
		.scan_type	= WL3501_SCAN_TYPE_ACTIVE,
		.probe_delay	= 0x10,
		.min_chan_time	= chan_time,
		.max_chan_time	= chan_time,
		.bss_type	= wl3501_fw_bss_type(this),
	};

	this->bss_cnt = this->join_sta_bss = 0;
	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static int wl3501_mgmt_join(struct wl3501_card *this, u16 stas)
{
	struct wl3501_join_req sig = {
		.sig_id		  = WL3501_SIG_JOIN_REQ,
		.timeout	  = 10,
		.ds_pset = {
			.el = {
				.id  = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET,
				.len = 1,
			},
			.chan	= this->chan,
		},
	};

	memcpy(&sig.beacon_period, &this->bss_set[stas].beacon_period, 72);
	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static int wl3501_mgmt_start(struct wl3501_card *this)
{
	struct wl3501_start_req sig = {
		.sig_id			= WL3501_SIG_START_REQ,
		.beacon_period		= 400,
		.dtim_period		= 1,
		.ds_pset = {
			.el = {
				.id  = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET,
				.len = 1,
			},
			.chan	= this->chan,
		},
		.bss_basic_rset	= {
			.el = {
				.id	= IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES,
				.len = 2,
			},
			.data_rate_labels = {
				[0] = IW_MGMT_RATE_LABEL_MANDATORY |
				      IW_MGMT_RATE_LABEL_1MBIT,
				[1] = IW_MGMT_RATE_LABEL_MANDATORY |
				      IW_MGMT_RATE_LABEL_2MBIT,
			},
		},
		.operational_rset	= {
			.el = {
				.id	= IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES,
				.len = 2,
			},
			.data_rate_labels = {
				[0] = IW_MGMT_RATE_LABEL_MANDATORY |
				      IW_MGMT_RATE_LABEL_1MBIT,
				[1] = IW_MGMT_RATE_LABEL_MANDATORY |
				      IW_MGMT_RATE_LABEL_2MBIT,
			},
		},
		.ibss_pset		= {
			.el = {
				.id	 = IW_MGMT_INFO_ELEMENT_IBSS_PARAMETER_SET,
				.len     = 2,
			},
			.atim_window = 10,
		},
		.bss_type		= wl3501_fw_bss_type(this),
		.cap_info		= wl3501_fw_cap_info(this),
	};

	iw_copy_mgmt_info_element(&sig.ssid.el, &this->essid.el);
	iw_copy_mgmt_info_element(&this->keep_essid.el, &this->essid.el);
	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static void wl3501_mgmt_scan_confirm(struct wl3501_card *this, u16 addr)
{
	u16 i = 0;
	int matchflag = 0;
	struct wl3501_scan_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
	if (sig.status == WL3501_STATUS_SUCCESS) {
		dprintk(3, "success");
		if ((this->net_type == IW_MODE_INFRA &&
		     (sig.cap_info & WL3501_MGMT_CAPABILITY_ESS)) ||
		    (this->net_type == IW_MODE_ADHOC &&
		     (sig.cap_info & WL3501_MGMT_CAPABILITY_IBSS)) ||
		    this->net_type == IW_MODE_AUTO) {
			if (!this->essid.el.len)
				matchflag = 1;
			else if (this->essid.el.len == 3 &&
				 !memcmp(this->essid.essid, "ANY", 3))
				matchflag = 1;
			else if (this->essid.el.len != sig.ssid.el.len)
				matchflag = 0;
			else if (memcmp(this->essid.essid, sig.ssid.essid,
					this->essid.el.len))
				matchflag = 0;
			else
				matchflag = 1;
			if (matchflag) {
				for (i = 0; i < this->bss_cnt; i++) {
					if (!memcmp(this->bss_set[i].bssid,
						    sig.bssid, ETH_ALEN)) {
						matchflag = 0;
						break;
					}
				}
			}
			if (matchflag && (i < 20)) {
				memcpy(&this->bss_set[i].beacon_period,
				       &sig.beacon_period, 73);
				this->bss_cnt++;
				this->rssi = sig.rssi;
			}
		}
	} else if (sig.status == WL3501_STATUS_TIMEOUT) {
		dprintk(3, "timeout");
		this->join_sta_bss = 0;
		for (i = this->join_sta_bss; i < this->bss_cnt; i++)
			if (!wl3501_mgmt_join(this, i))
				break;
		this->join_sta_bss = i;
		if (this->join_sta_bss == this->bss_cnt) {
			if (this->net_type == IW_MODE_INFRA)
				wl3501_mgmt_scan(this, 100);
			else {
				this->adhoc_times++;
				if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES)
					wl3501_mgmt_start(this);
				else
					wl3501_mgmt_scan(this, 100);
			}
		}
	}
}

/**
 * wl3501_block_interrupt - Mask interrupt from SUTRO
 * @this - card
 *
 * Mask interrupt from SUTRO. (i.e. SUTRO cannot interrupt the HOST)
 * Return: 1 if interrupt is originally enabled
 */
static int wl3501_block_interrupt(struct wl3501_card *this)
{
	u8 old = inb(this->base_addr + WL3501_NIC_GCR);
	u8 new = old & (~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC |
			WL3501_GCR_ENECINT));

	wl3501_outb(new, this->base_addr + WL3501_NIC_GCR);
	return old & WL3501_GCR_ENECINT;
}

/**
 * wl3501_unblock_interrupt - Enable interrupt from SUTRO
 * @this - card
 *
 * Enable interrupt from SUTRO. (i.e. SUTRO can interrupt the HOST)
 * Return: 1 if interrupt is originally enabled
 */
static int wl3501_unblock_interrupt(struct wl3501_card *this)
{
	u8 old = inb(this->base_addr + WL3501_NIC_GCR);
	u8 new = (old & ~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC)) |
		  WL3501_GCR_ENECINT;

	wl3501_outb(new, this->base_addr + WL3501_NIC_GCR);
	return old & WL3501_GCR_ENECINT;
}

/**
 * wl3501_receive - Receive data from Receive Queue.
 *
 * Receive data from Receive Queue.
 *
 * @this: card
 * @bf: address of host
 * @size: size of buffer.
 */
static u16 wl3501_receive(struct wl3501_card *this, u8 *bf, u16 size)
{
	u16 next_addr, next_addr1;
	u8 *data = bf + 12;

	size -= 12;
	wl3501_get_from_wla(this, this->start_seg + 2,
			    &next_addr, sizeof(next_addr));
	if (size > WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr)) {
		wl3501_get_from_wla(this,
				    this->start_seg +
					sizeof(struct wl3501_rx_hdr), data,
				    WL3501_BLKSZ -
					sizeof(struct wl3501_rx_hdr));
		size -= WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr);
		data += WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr);
	} else {
		wl3501_get_from_wla(this,
				    this->start_seg +
					sizeof(struct wl3501_rx_hdr),
				    data, size);
		size = 0;
	}
	while (size > 0) {
		if (size > WL3501_BLKSZ - 5) {
			wl3501_get_from_wla(this, next_addr + 5, data,
					    WL3501_BLKSZ - 5);
			size -= WL3501_BLKSZ - 5;
			data += WL3501_BLKSZ - 5;
			wl3501_get_from_wla(this, next_addr + 2, &next_addr1,
					    sizeof(next_addr1));
			next_addr = next_addr1;
		} else {
			wl3501_get_from_wla(this, next_addr + 5, data, size);
			size = 0;
		}
	}
	return 0;
}

static void wl3501_esbq_req_free(struct wl3501_card *this)
{
	u8 tmp;
	u16 addr;

	if (this->esbq_req_head == this->esbq_req_tail)
		goto out;
	wl3501_get_from_wla(this, this->esbq_req_tail + 3, &tmp, sizeof(tmp));
	if (!(tmp & 0x80))
		goto out;
	wl3501_get_from_wla(this, this->esbq_req_tail, &addr, sizeof(addr));
	wl3501_free_tx_buffer(this, addr);
	this->esbq_req_tail += 4;
	if (this->esbq_req_tail >= this->esbq_req_end)
		this->esbq_req_tail = this->esbq_req_start;
out:
	return;
}

static int wl3501_esbq_confirm(struct wl3501_card *this)
{
	u8 tmp;

	wl3501_get_from_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp));
	return tmp & 0x80;
}

static void wl3501_online(struct net_device *dev)
{
	struct wl3501_card *this = dev->priv;

	printk(KERN_INFO "%s: Wireless LAN online. BSSID: "
	       "%02X %02X %02X %02X %02X %02X\n", dev->name,
	       this->bssid[0], this->bssid[1], this->bssid[2],
	       this->bssid[3], this->bssid[4], this->bssid[5]);
	netif_wake_queue(dev);
}

static void wl3501_esbq_confirm_done(struct wl3501_card *this)
{
	u8 tmp = 0;

	wl3501_set_to_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp));
	this->esbq_confirm += 4;
	if (this->esbq_confirm >= this->esbq_confirm_end)
		this->esbq_confirm = this->esbq_confirm_start;
}

static int wl3501_mgmt_auth(struct wl3501_card *this)
{
	struct wl3501_auth_req sig = {
		.sig_id	 = WL3501_SIG_AUTH_REQ,
		.type	 = WL3501_SYS_TYPE_OPEN,
		.timeout = 1000,
	};

	dprintk(3, "entry");
	memcpy(sig.mac_addr, this->bssid, ETH_ALEN);
	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static int wl3501_mgmt_association(struct wl3501_card *this)
{
	struct wl3501_assoc_req sig = {
		.sig_id		 = WL3501_SIG_ASSOC_REQ,
		.timeout	 = 1000,
		.listen_interval = 5,
		.cap_info	 = this->cap_info,
	};

	dprintk(3, "entry");
	memcpy(sig.mac_addr, this->bssid, ETH_ALEN);
	return wl3501_esbq_exec(this, &sig, sizeof(sig));
}

static void wl3501_mgmt_join_confirm(struct net_device *dev, u16 addr)
{
	struct wl3501_card *this = dev->priv;
	struct wl3501_join_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
	if (sig.status == WL3501_STATUS_SUCCESS) {
		if (this->net_type == IW_MODE_INFRA) {
			if (this->join_sta_bss < this->bss_cnt) {
				const int i = this->join_sta_bss;
				memcpy(this->bssid,
				       this->bss_set[i].bssid, ETH_ALEN);
				this->chan = this->bss_set[i].ds_pset.chan;
				iw_copy_mgmt_info_element(&this->keep_essid.el,
						     &this->bss_set[i].ssid.el);
				wl3501_mgmt_auth(this);
			}
		} else {
			const int i = this->join_sta_bss;

			memcpy(&this->bssid, &this->bss_set[i].bssid, ETH_ALEN);
			this->chan = this->bss_set[i].ds_pset.chan;
			iw_copy_mgmt_info_element(&this->keep_essid.el,
						  &this->bss_set[i].ssid.el);
			wl3501_online(dev);
		}
	} else {
		int i;
		this->join_sta_bss++;
		for (i = this->join_sta_bss; i < this->bss_cnt; i++)
			if (!wl3501_mgmt_join(this, i))
				break;
		this->join_sta_bss = i;
		if (this->join_sta_bss == this->bss_cnt) {
			if (this->net_type == IW_MODE_INFRA)
				wl3501_mgmt_scan(this, 100);
			else {
				this->adhoc_times++;
				if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES)
					wl3501_mgmt_start(this);
				else
					wl3501_mgmt_scan(this, 100);
			}
		}
	}
}

static inline void wl3501_alarm_interrupt(struct net_device *dev,
					  struct wl3501_card *this)
{
	if (this->net_type == IW_MODE_INFRA) {
		printk(KERN_INFO "Wireless LAN offline\n");
		netif_stop_queue(dev);
		wl3501_mgmt_resync(this);
	}
}

static inline void wl3501_md_confirm_interrupt(struct net_device *dev,
					       struct wl3501_card *this,
					       u16 addr)
{
	struct wl3501_md_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
	wl3501_free_tx_buffer(this, sig.data);
	if (netif_queue_stopped(dev))
		netif_wake_queue(dev);
}

static inline void wl3501_md_ind_interrupt(struct net_device *dev,
					   struct wl3501_card *this, u16 addr)
{
	struct wl3501_md_ind sig;
	struct sk_buff *skb;
	u8 rssi, addr4[ETH_ALEN];
	u16 pkt_len;

	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
	this->start_seg = sig.data;
	wl3501_get_from_wla(this,
			    sig.data + offsetof(struct wl3501_rx_hdr, rssi),
			    &rssi, sizeof(rssi));
	this->rssi = rssi <= 63 ? (rssi * 100) / 64 : 255;

	wl3501_get_from_wla(this,
			    sig.data +
				offsetof(struct wl3501_rx_hdr, addr4),
			    &addr4, sizeof(addr4));
	if (!(addr4[0] == 0xAA && addr4[1] == 0xAA &&
	      addr4[2] == 0x03 && addr4[4] == 0x00)) {
		printk(KERN_INFO "Insupported packet type!\n");
		return;
	}
	pkt_len = sig.size + 12 - 24 - 4 - 6;

	skb = dev_alloc_skb(pkt_len + 5);

	if (!skb) {
		printk(KERN_WARNING "%s: Can't alloc a sk_buff of size %d.\n",
		       dev->name, pkt_len);
		this->stats.rx_dropped++;
	} else {
		skb->dev = dev;
		skb_reserve(skb, 2); /* IP headers on 16 bytes boundaries */
		eth_copy_and_sum(skb, (unsigned char *)&sig.daddr, 12, 0);
		wl3501_receive(this, skb->data, pkt_len);
		skb_put(skb, pkt_len);
		skb->protocol	= eth_type_trans(skb, dev);
		dev->last_rx	= jiffies;
		this->stats.rx_packets++;
		this->stats.rx_bytes += skb->len;
		netif_rx(skb);
	}
}

static inline void wl3501_get_confirm_interrupt(struct wl3501_card *this,
						u16 addr, void *sig, int size)
{
	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &this->sig_get_confirm,
			    sizeof(this->sig_get_confirm));
	wake_up(&this->wait);
}

static inline void wl3501_start_confirm_interrupt(struct net_device *dev,
						  struct wl3501_card *this,
						  u16 addr)
{
	struct wl3501_start_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
	if (sig.status == WL3501_STATUS_SUCCESS)
		netif_wake_queue(dev);
}

static inline void wl3501_assoc_confirm_interrupt(struct net_device *dev,
						  u16 addr)
{
	struct wl3501_card *this = dev->priv;
	struct wl3501_assoc_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));

	if (sig.status == WL3501_STATUS_SUCCESS)
		wl3501_online(dev);
}

static inline void wl3501_auth_confirm_interrupt(struct wl3501_card *this,
						 u16 addr)
{
	struct wl3501_auth_confirm sig;

	dprintk(3, "entry");
	wl3501_get_from_wla(this, addr, &sig, sizeof(sig));

	if (sig.status == WL3501_STATUS_SUCCESS)
		wl3501_mgmt_association(this);
	else
		wl3501_mgmt_resync(this);
}

static inline void wl3501_rx_interrupt(struct net_device *dev)
{
	int morepkts;
	u16 addr;
	u8 sig_id;
	struct wl3501_card *this = dev->priv;

	dprintk(3, "entry");
loop:
	morepkts = 0;