mwifiex: add cfg80211 handler for set_bitrate_mask

Currently, setting only legacy bitrates on 2.4GHz band
are supported. Mode 802.11b/g/bg is enabled based on
bitrates selection. If only CCK bitrates selected then
802.11b mode is enabled. If only OFDM bitrates are
selected then 802.11g mode is enabled. For both: CCK
and OFDM rates 802.11bg mixed mode is enabled.

Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 4487d935654e..352d2c5da1fc 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -672,6 +672,59 @@ static const u32 mwifiex_cipher_suites[] = {
 };
 
 /*
+ * CFG802.11 operation handler for setting bit rates.
+ *
+ * Function selects legacy bang B/G/BG from corresponding bitrates selection.
+ * Currently only 2.4GHz band is supported.
+ */
+static int mwifiex_cfg80211_set_bitrate_mask(struct wiphy *wiphy,
+                                struct net_device *dev,
+                                const u8 *peer,
+                                const struct cfg80211_bitrate_mask *mask)
+{
+        struct mwifiex_ds_band_cfg band_cfg;
+        struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+        int index = 0, mode = 0, i;
+
+        /* Currently only 2.4GHz is supported */
+        for (i = 0; i < mwifiex_band_2ghz.n_bitrates; i++) {
+                /*
+                 * Rates below 6 Mbps in the table are CCK rates; 802.11b
+                 * and from 6 they are OFDM; 802.11G
+                 */
+                if (mwifiex_rates[i].bitrate == 60) {
+                        index = 1 << i;
+                        break;
+                }
+        }
+
+        if (mask->control[IEEE80211_BAND_2GHZ].legacy < index) {
+                mode = BAND_B;
+        } else {
+                mode = BAND_G;
+                if (mask->control[IEEE80211_BAND_2GHZ].legacy % index)
+                        mode |=  BAND_B;
+        }
+
+        memset(&band_cfg, 0, sizeof(band_cfg));
+        band_cfg.config_bands = mode;
+
+        if (priv->bss_mode == NL80211_IFTYPE_ADHOC)
+                band_cfg.adhoc_start_band = mode;
+
+        band_cfg.sec_chan_offset = NO_SEC_CHANNEL;
+
+        if (mwifiex_set_radio_band_cfg(priv, &band_cfg))
+                return -EFAULT;
+
+        wiphy_debug(wiphy, "info: device configured in 802.11%s%s mode\n",
+                                (mode & BAND_B) ? "b" : "",
+                                (mode & BAND_G) ? "g" : "");
+
+        return 0;
+}
+
+/*
  * CFG802.11 operation handler for disconnection request.
  *
  * This function does not work when there is already a disconnection
@@ -1225,6 +1278,7 @@ static struct cfg80211_ops mwifiex_cfg80211_ops = {
         .set_default_key = mwifiex_cfg80211_set_default_key,
         .set_power_mgmt = mwifiex_cfg80211_set_power_mgmt,
         .set_tx_power = mwifiex_cfg80211_set_tx_power,
+        .set_bitrate_mask = mwifiex_cfg80211_set_bitrate_mask,
 };
 
 /*