[RFC 60g 1/5] wireless: add 802.11ad (60gHz band)

[Vladimir Kondratiev <qca_vkondrat@xxxxxxxxxxxxxxxx>]

Add enumerations for both cfg80211 and nl80211.
This expands wiphy.bands etc. arrays.

Extend channel <-> frequency translation to cover 60g band

Small fix for mac80211/tx.c required to fix compiler warning

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@xxxxxxxxxxxxxxxx>
---
 include/linux/nl80211.h |    2 ++
 include/net/cfg80211.h  |    2 ++
 net/mac80211/tx.c       |    2 ++
 net/wireless/util.c     |   30 ++++++++++++++++++++++--------
 4 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index c0fc5d2..679831e 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -2539,10 +2539,12 @@ enum nl80211_tx_rate_attributes {
  * enum nl80211_band - Frequency band
  * @NL80211_BAND_2GHZ: 2.4 GHz ISM band
  * @NL80211_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
+ * @NL80211_BAND_60GHZ: around 60 GHz band (58.32 - 64.80 GHz)
  */
 enum nl80211_band {
 	NL80211_BAND_2GHZ,
 	NL80211_BAND_5GHZ,
+	NL80211_BAND_60GHZ,
 };
 
 /**
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 061c019..56e840d 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -70,11 +70,13 @@
  *
  * @IEEE80211_BAND_2GHZ: 2.4GHz ISM band
  * @IEEE80211_BAND_5GHZ: around 5GHz band (4.9-5.7)
+ * @IEEE80211_BAND_60GHZ: around 60 GHz band (58.32 - 64.80 GHz)
  * @IEEE80211_NUM_BANDS: number of defined bands
  */
 enum ieee80211_band {
 	IEEE80211_BAND_2GHZ = NL80211_BAND_2GHZ,
 	IEEE80211_BAND_5GHZ = NL80211_BAND_5GHZ,
+	IEEE80211_BAND_60GHZ = NL80211_BAND_60GHZ,
 
 	/* keep last */
 	IEEE80211_NUM_BANDS
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index ec8f5346..eebd33a 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -140,6 +140,8 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
 			if (r->flags & IEEE80211_RATE_MANDATORY_A)
 				mrate = r->bitrate;
 			break;
+		case IEEE80211_BAND_60GHZ:
+			/* TODO, for now fall through */
 		case IEEE80211_NUM_BANDS:
 			WARN_ON(1);
 			break;
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 316cfd0..5c7195e 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -35,19 +35,29 @@ int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
 {
 	/* see 802.11 17.3.8.3.2 and Annex J
 	 * there are overlapping channel numbers in 5GHz and 2GHz bands */
-	if (band == IEEE80211_BAND_5GHZ) {
-		if (chan >= 182 && chan <= 196)
-			return 4000 + chan * 5;
-		else
-			return 5000 + chan * 5;
-	} else { /* IEEE80211_BAND_2GHZ */
+	if (chan <= 0)
+		return 0; /* not supported */
+	switch (band) {
+	case IEEE80211_BAND_2GHZ:
 		if (chan == 14)
 			return 2484;
 		else if (chan < 14)
 			return 2407 + chan * 5;
+		break;
+	case IEEE80211_BAND_5GHZ:
+		if (chan >= 182 && chan <= 196)
+			return 4000 + chan * 5;
 		else
-			return 0; /* not supported */
+			return 5000 + chan * 5;
+		break;
+	case IEEE80211_BAND_60GHZ:
+		if (chan < 5)
+			return 56160 + chan * 2160;
+		break;
+	default:
+		;
 	}
+	return 0; /* not supported */
 }
 EXPORT_SYMBOL(ieee80211_channel_to_frequency);
 
@@ -60,8 +70,12 @@ int ieee80211_frequency_to_channel(int freq)
 		return (freq - 2407) / 5;
 	else if (freq >= 4910 && freq <= 4980)
 		return (freq - 4000) / 5;
-	else
+	else if (freq <= 6000) /* TODO: check band 5.2 upper limit */
 		return (freq - 5000) / 5;
+	else if (freq >= 58320 && freq <= 64800)
+		return (freq - 56160) / 2160;
+	else
+		return 0;
 }
 EXPORT_SYMBOL(ieee80211_frequency_to_channel);
 
-- 
1.7.9.5

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