Update compat-wireless to 2.6.36-5-spn

chromeos/compat-wireless/drivers/net/wireless/orinoco/scan.c

Index: chromeos/compat-wireless/drivers/net/wireless/orinoco/scan.c
diff --git a/chromeos/compat-wireless/drivers/net/wireless/orinoco/scan.c b/chromeos/compat-wireless/drivers/net/wireless/orinoco/scan.c
new file mode 100644
index 0000000000000000000000000000000000000000..4300d9db7d8caab2d70442b7cbd37a9da69adef9
--- /dev/null
+++ b/chromeos/compat-wireless/drivers/net/wireless/orinoco/scan.c
@@ -0,0 +1,231 @@
+/* Helpers for managing scan queues
+ *
+ * See copyright notice in main.c
+ */
+
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ieee80211.h>
+#include <net/cfg80211.h>
+
+#include "hermes.h"
+#include "orinoco.h"
+#include "main.h"
+
+#include "scan.h"
+
+#define ZERO_DBM_OFFSET 0x95
+#define MAX_SIGNAL_LEVEL 0x8A
+#define MIN_SIGNAL_LEVEL 0x2F
+
+#define SIGNAL_TO_DBM(x)					\
+	(clamp_t(s32, (x), MIN_SIGNAL_LEVEL, MAX_SIGNAL_LEVEL)	\
+	 - ZERO_DBM_OFFSET)
+#define SIGNAL_TO_MBM(x) (SIGNAL_TO_DBM(x) * 100)
+
+static int symbol_build_supp_rates(u8 *buf, const __le16 *rates)
+{
+	int i;
+	u8 rate;
+
+	buf[0] = WLAN_EID_SUPP_RATES;
+	for (i = 0; i < 5; i++) {
+		rate = le16_to_cpu(rates[i]);
+		/* NULL terminated */
+		if (rate == 0x0)
+			break;
+		buf[i + 2] = rate;
+	}
+	buf[1] = i;
+
+	return i + 2;
+}
+
+static int prism_build_supp_rates(u8 *buf, const u8 *rates)
+{
+	int i;
+
+	buf[0] = WLAN_EID_SUPP_RATES;
+	for (i = 0; i < 8; i++) {
+		/* NULL terminated */
+		if (rates[i] == 0x0)
+			break;
+		buf[i + 2] = rates[i];
+	}
+	buf[1] = i;
+
+	/* We might still have another 2 rates, which need to go in
+	 * extended supported rates */
+	if (i == 8 && rates[i] > 0) {
+		buf[10] = WLAN_EID_EXT_SUPP_RATES;
+		for (; i < 10; i++) {
+			/* NULL terminated */
+			if (rates[i] == 0x0)
+				break;
+			buf[i + 2] = rates[i];
+		}
+		buf[11] = i - 8;
+	}
+
+	return (i < 8) ? i + 2 : i + 4;
+}
+
+static void orinoco_add_hostscan_result(struct orinoco_private *priv,
+					const union hermes_scan_info *bss)
+{
+	struct wiphy *wiphy = priv_to_wiphy(priv);
+	struct ieee80211_channel *channel;
+	u8 *ie;
+	u8 ie_buf[46];
+	u64 timestamp;
+	s32 signal;
+	u16 capability;
+	u16 beacon_interval;
+	int ie_len;
+	int freq;
+	int len;
+
+	len = le16_to_cpu(bss->a.essid_len);
+
+	/* Reconstruct SSID and bitrate IEs to pass up */
+	ie_buf[0] = WLAN_EID_SSID;
+	ie_buf[1] = len;
+	memcpy(&ie_buf[2], bss->a.essid, len);
+
+	ie = ie_buf + len + 2;
+	ie_len = ie_buf[1] + 2;
+	switch (priv->firmware_type) {
+	case FIRMWARE_TYPE_SYMBOL:
+		ie_len += symbol_build_supp_rates(ie, bss->s.rates);
+		break;
+
+	case FIRMWARE_TYPE_INTERSIL:
+		ie_len += prism_build_supp_rates(ie, bss->p.rates);
+		break;
+
+	case FIRMWARE_TYPE_AGERE:
+	default:
+		break;
+	}
+
+	freq = ieee80211_dsss_chan_to_freq(le16_to_cpu(bss->a.channel));
+	channel = ieee80211_get_channel(wiphy, freq);
+	timestamp = 0;
+	capability = le16_to_cpu(bss->a.capabilities);
+	beacon_interval = le16_to_cpu(bss->a.beacon_interv);
+	signal = SIGNAL_TO_MBM(le16_to_cpu(bss->a.level));
+
+	cfg80211_inform_bss(wiphy, channel, bss->a.bssid, timestamp,
+			    capability, beacon_interval, ie_buf, ie_len,
+			    signal, GFP_KERNEL);
+}
+
+void orinoco_add_extscan_result(struct orinoco_private *priv,
+				struct agere_ext_scan_info *bss,
+				size_t len)
+{
+	struct wiphy *wiphy = priv_to_wiphy(priv);
+	struct ieee80211_channel *channel;
+	const u8 *ie;
+	u64 timestamp;
+	s32 signal;
+	u16 capability;
+	u16 beacon_interval;
+	size_t ie_len;
+	int chan, freq;
+
+	ie_len = len - sizeof(*bss);
+	ie = cfg80211_find_ie(WLAN_EID_DS_PARAMS, bss->data, ie_len);
+	chan = ie ? ie[2] : 0;
+	freq = ieee80211_dsss_chan_to_freq(chan);
+	channel = ieee80211_get_channel(wiphy, freq);
+
+	timestamp = le64_to_cpu(bss->timestamp);
+	capability = le16_to_cpu(bss->capabilities);
+	beacon_interval = le16_to_cpu(bss->beacon_interval);
+	ie = bss->data;
+	signal = SIGNAL_TO_MBM(bss->level);
+
+	cfg80211_inform_bss(wiphy, channel, bss->bssid, timestamp,
+			    capability, beacon_interval, ie, ie_len,
+			    signal, GFP_KERNEL);
+}
+
+void orinoco_add_hostscan_results(struct orinoco_private *priv,
+				  unsigned char *buf,
+				  size_t len)
+{
+	int offset;		/* In the scan data */
+	size_t atom_len;
+	bool abort = false;
+
+	switch (priv->firmware_type) {
+	case FIRMWARE_TYPE_AGERE:
+		atom_len = sizeof(struct agere_scan_apinfo);
+		offset = 0;
+		break;
+
+	case FIRMWARE_TYPE_SYMBOL:
+		/* Lack of documentation necessitates this hack.
+		 * Different firmwares have 68 or 76 byte long atoms.
+		 * We try modulo first.  If the length divides by both,
+		 * we check what would be the channel in the second
+		 * frame for a 68-byte atom.  76-byte atoms have 0 there.
+		 * Valid channel cannot be 0.  */
+		if (len % 76)
+			atom_len = 68;
+		else if (len % 68)
+			atom_len = 76;
+		else if (len >= 1292 && buf[68] == 0)
+			atom_len = 76;
+		else
+			atom_len = 68;
+		offset = 0;
+		break;
+
+	case FIRMWARE_TYPE_INTERSIL:
+		offset = 4;
+		if (priv->has_hostscan) {
+			atom_len = le16_to_cpup((__le16 *)buf);
+			/* Sanity check for atom_len */
+			if (atom_len < sizeof(struct prism2_scan_apinfo)) {
+				printk(KERN_ERR "%s: Invalid atom_len in scan "
+				       "data: %zu\n", priv->ndev->name,
+				       atom_len);
+				abort = true;
+				goto scan_abort;
+			}
+		} else
+			atom_len = offsetof(struct prism2_scan_apinfo, atim);
+		break;
+
+	default:
+		abort = true;
+		goto scan_abort;
+	}
+
+	/* Check that we got an whole number of atoms */
+	if ((len - offset) % atom_len) {
+		printk(KERN_ERR "%s: Unexpected scan data length %zu, "
+		       "atom_len %zu, offset %d\n", priv->ndev->name, len,
+		       atom_len, offset);
+		abort = true;
+		goto scan_abort;
+	}
+
+	/* Process the entries one by one */
+	for (; offset + atom_len <= len; offset += atom_len) {
+		union hermes_scan_info *atom;
+
+		atom = (union hermes_scan_info *) (buf + offset);
+
+		orinoco_add_hostscan_result(priv, atom);
+	}
+
+ scan_abort:
+	if (priv->scan_request) {
+		cfg80211_scan_done(priv->scan_request, abort);
+		priv->scan_request = NULL;
+	}
+}