+/*
+ * Match the hw provided rate index (through descriptors)
+ * to an index for sc->curband->bitrates, so it can be used
+ * by the stack.
+ *
+ * This one is a little bit tricky but i think i'm right
+ * about this...
+ *
+ * We have 4 rate tables in the following order:
+ * XR (4 rates)
+ * 802.11a (8 rates)
+ * 802.11b (4 rates)
+ * 802.11g (12 rates)
+ * that make the hw rate table.
+ *
+ * Lets take a 5211 for example that supports a and b modes only.
+ * First comes the 802.11a table and then 802.11b (total 12 rates).
+ * When hw returns eg. 11 it points to the last 802.11b rate (11Mbit),
+ * if it returns 2 it points to the second 802.11a rate etc.
+ *
+ * Same goes for 5212 who has xr/a/b/g support (total 28 rates).
+ * First comes the XR table, then 802.11a, 802.11b and 802.11g.
+ * When hw returns eg. 27 it points to the last 802.11g rate (54Mbits) etc
+ */
+static void
+ath5k_set_total_hw_rates(struct ath5k_softc *sc) {
+
+ struct ath5k_hw *ah = sc->ah;
+
+ if (test_bit(AR5K_MODE_11A, ah->ah_modes))
+ sc->a_rates = 8;
+
+ if (test_bit(AR5K_MODE_11B, ah->ah_modes))
+ sc->b_rates = 4;
+
+ if (test_bit(AR5K_MODE_11G, ah->ah_modes))
+ sc->g_rates = 12;
+
+ /* XXX: Need to see what what happens when
+ xr disable bits in eeprom are set */
+ if (ah->ah_version >= AR5K_AR5212)
+ sc->xr_rates = 4;
+
+}
+
+static inline int
+ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix) {
+
+ int mac80211_rix;
+
+ if(sc->curband->band == IEEE80211_BAND_2GHZ) {
+ /* We setup a g ratetable for both b/g modes */
+ mac80211_rix =
+ hw_rix - sc->b_rates - sc->a_rates - sc->xr_rates;
+ } else {
+ mac80211_rix = hw_rix - sc->xr_rates;
+ }
+
+ /* Something went wrong, fallback to basic rate for this band */
+ if ((mac80211_rix >= sc->curband->n_bitrates) ||
+ (mac80211_rix <= 0 ))
+ mac80211_rix = 1;
+
+ return mac80211_rix;
+}
+