libertas: first stab at cfg80211 support

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 198 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
new file mode 100644
index 00000000000..4396dccd12a
--- /dev/null
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -0,0 +1,198 @@
+/*
+ * Implement cfg80211 ("iw") support.
+ *
+ * Copyright (C) 2009 M&N Solutions GmbH, 61191 Rosbach, Germany
+ * Holger Schurig <hs4233@mail.mn-solutions.de>
+ *
+ */
+
+#include <net/cfg80211.h>
+
+#include "cfg.h"
+#include "cmd.h"
+
+
+#define CHAN2G(_channel, _freq, _flags) {        \
+        .band             = IEEE80211_BAND_2GHZ, \
+        .center_freq      = (_freq),             \
+        .hw_value         = (_channel),          \
+        .flags            = (_flags),            \
+        .max_antenna_gain = 0,                   \
+        .max_power        = 30,                  \
+}
+
+static struct ieee80211_channel lbs_2ghz_channels[] = {
+        CHAN2G(1,  2412, 0),
+        CHAN2G(2,  2417, 0),
+        CHAN2G(3,  2422, 0),
+        CHAN2G(4,  2427, 0),
+        CHAN2G(5,  2432, 0),
+        CHAN2G(6,  2437, 0),
+        CHAN2G(7,  2442, 0),
+        CHAN2G(8,  2447, 0),
+        CHAN2G(9,  2452, 0),
+        CHAN2G(10, 2457, 0),
+        CHAN2G(11, 2462, 0),
+        CHAN2G(12, 2467, 0),
+        CHAN2G(13, 2472, 0),
+        CHAN2G(14, 2484, 0),
+};
+
+#define RATETAB_ENT(_rate, _rateid, _flags) { \
+        .bitrate  = (_rate),                  \
+        .hw_value = (_rateid),                \
+        .flags    = (_flags),                 \
+}
+
+
+static struct ieee80211_rate lbs_rates[] = {
+        RATETAB_ENT(10,  0x1,   0),
+        RATETAB_ENT(20,  0x2,   0),
+        RATETAB_ENT(55,  0x4,   0),
+        RATETAB_ENT(110, 0x8,   0),
+        RATETAB_ENT(60,  0x10,  0),
+        RATETAB_ENT(90,  0x20,  0),
+        RATETAB_ENT(120, 0x40,  0),
+        RATETAB_ENT(180, 0x80,  0),
+        RATETAB_ENT(240, 0x100, 0),
+        RATETAB_ENT(360, 0x200, 0),
+        RATETAB_ENT(480, 0x400, 0),
+        RATETAB_ENT(540, 0x800, 0),
+};
+
+static struct ieee80211_supported_band lbs_band_2ghz = {
+        .channels = lbs_2ghz_channels,
+        .n_channels = ARRAY_SIZE(lbs_2ghz_channels),
+        .bitrates = lbs_rates,
+        .n_bitrates = ARRAY_SIZE(lbs_rates),
+};
+
+
+static const u32 cipher_suites[] = {
+        WLAN_CIPHER_SUITE_WEP40,
+        WLAN_CIPHER_SUITE_WEP104,
+        WLAN_CIPHER_SUITE_TKIP,
+        WLAN_CIPHER_SUITE_CCMP,
+};
+
+
+
+static int lbs_cfg_set_channel(struct wiphy *wiphy,
+        struct ieee80211_channel *chan,
+        enum nl80211_channel_type channel_type)
+{
+        struct lbs_private *priv = wiphy_priv(wiphy);
+        int ret = -ENOTSUPP;
+
+        lbs_deb_enter_args(LBS_DEB_CFG80211, "freq %d, type %d", chan->center_freq, channel_type);
+
+        if (channel_type != NL80211_CHAN_NO_HT)
+                goto out;
+
+        ret = lbs_set_channel(priv, chan->hw_value);
+
+ out:
+        lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
+        return ret;
+}
+
+
+
+
+static struct cfg80211_ops lbs_cfg80211_ops = {
+        .set_channel = lbs_cfg_set_channel,
+};
+
+
+/*
+ * At this time lbs_private *priv doesn't even exist, so we just allocate
+ * memory and don't initialize the wiphy further. This is postponed until we
+ * can talk to the firmware and happens at registration time in
+ * lbs_cfg_wiphy_register().
+ */
+struct wireless_dev *lbs_cfg_alloc(struct device *dev)
+{
+        int ret = 0;
+        struct wireless_dev *wdev;
+
+        lbs_deb_enter(LBS_DEB_CFG80211);
+
+        wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
+        if (!wdev) {
+                dev_err(dev, "cannot allocate wireless device\n");
+                return ERR_PTR(-ENOMEM);
+        }
+
+        wdev->wiphy = wiphy_new(&lbs_cfg80211_ops, sizeof(struct lbs_private));
+        if (!wdev->wiphy) {
+                dev_err(dev, "cannot allocate wiphy\n");
+                ret = -ENOMEM;
+                goto err_wiphy_new;
+        }
+
+        lbs_deb_leave(LBS_DEB_CFG80211);
+        return wdev;
+
+ err_wiphy_new:
+        kfree(wdev);
+        lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
+        return ERR_PTR(ret);
+}
+
+
+/*
+ * This function get's called after lbs_setup_firmware() determined the
+ * firmware capabities. So we can setup the wiphy according to our
+ * hardware/firmware.
+ */
+int lbs_cfg_register(struct lbs_private *priv)
+{
+        struct wireless_dev *wdev = priv->wdev;
+        int ret;
+
+        lbs_deb_enter(LBS_DEB_CFG80211);
+
+        wdev->wiphy->max_scan_ssids = 1;
+        wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
+
+        /* TODO: BIT(NL80211_IFTYPE_ADHOC); */
+        wdev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+
+        /* TODO: honor priv->regioncode */
+        wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &lbs_band_2ghz;
+
+        /*
+         * We could check priv->fwcapinfo && FW_CAPINFO_WPA, but I have
+         * never seen a firmware without WPA
+         */
+        wdev->wiphy->cipher_suites = cipher_suites;
+        wdev->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
+
+        ret = wiphy_register(wdev->wiphy);
+        if (ret < 0)
+                lbs_pr_err("cannot register wiphy device\n");
+
+        ret = register_netdev(priv->dev);
+        if (ret)
+                lbs_pr_err("cannot register network device\n");
+
+        lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
+        return ret;
+}
+
+
+void lbs_cfg_free(struct lbs_private *priv)
+{
+        struct wireless_dev *wdev = priv->wdev;
+
+        lbs_deb_enter(LBS_DEB_CFG80211);
+
+        if (!wdev)
+                return;
+
+        if (wdev->wiphy) {
+                wiphy_unregister(wdev->wiphy);
+                wiphy_free(wdev->wiphy);
+        }
+        kfree(wdev);
+}