libertas: first stab at cfg80211 support
[linux-2.6.git] / drivers / net / wireless / libertas / cfg.c
1 /*
2  * Implement cfg80211 ("iw") support.
3  *
4  * Copyright (C) 2009 M&N Solutions GmbH, 61191 Rosbach, Germany
5  * Holger Schurig <hs4233@mail.mn-solutions.de>
6  *
7  */
8
9 #include <net/cfg80211.h>
10
11 #include "cfg.h"
12 #include "cmd.h"
13
14
15 #define CHAN2G(_channel, _freq, _flags) {        \
16         .band             = IEEE80211_BAND_2GHZ, \
17         .center_freq      = (_freq),             \
18         .hw_value         = (_channel),          \
19         .flags            = (_flags),            \
20         .max_antenna_gain = 0,                   \
21         .max_power        = 30,                  \
22 }
23
24 static struct ieee80211_channel lbs_2ghz_channels[] = {
25         CHAN2G(1,  2412, 0),
26         CHAN2G(2,  2417, 0),
27         CHAN2G(3,  2422, 0),
28         CHAN2G(4,  2427, 0),
29         CHAN2G(5,  2432, 0),
30         CHAN2G(6,  2437, 0),
31         CHAN2G(7,  2442, 0),
32         CHAN2G(8,  2447, 0),
33         CHAN2G(9,  2452, 0),
34         CHAN2G(10, 2457, 0),
35         CHAN2G(11, 2462, 0),
36         CHAN2G(12, 2467, 0),
37         CHAN2G(13, 2472, 0),
38         CHAN2G(14, 2484, 0),
39 };
40
41 #define RATETAB_ENT(_rate, _rateid, _flags) { \
42         .bitrate  = (_rate),                  \
43         .hw_value = (_rateid),                \
44         .flags    = (_flags),                 \
45 }
46
47
48 static struct ieee80211_rate lbs_rates[] = {
49         RATETAB_ENT(10,  0x1,   0),
50         RATETAB_ENT(20,  0x2,   0),
51         RATETAB_ENT(55,  0x4,   0),
52         RATETAB_ENT(110, 0x8,   0),
53         RATETAB_ENT(60,  0x10,  0),
54         RATETAB_ENT(90,  0x20,  0),
55         RATETAB_ENT(120, 0x40,  0),
56         RATETAB_ENT(180, 0x80,  0),
57         RATETAB_ENT(240, 0x100, 0),
58         RATETAB_ENT(360, 0x200, 0),
59         RATETAB_ENT(480, 0x400, 0),
60         RATETAB_ENT(540, 0x800, 0),
61 };
62
63 static struct ieee80211_supported_band lbs_band_2ghz = {
64         .channels = lbs_2ghz_channels,
65         .n_channels = ARRAY_SIZE(lbs_2ghz_channels),
66         .bitrates = lbs_rates,
67         .n_bitrates = ARRAY_SIZE(lbs_rates),
68 };
69
70
71 static const u32 cipher_suites[] = {
72         WLAN_CIPHER_SUITE_WEP40,
73         WLAN_CIPHER_SUITE_WEP104,
74         WLAN_CIPHER_SUITE_TKIP,
75         WLAN_CIPHER_SUITE_CCMP,
76 };
77
78
79
80 static int lbs_cfg_set_channel(struct wiphy *wiphy,
81         struct ieee80211_channel *chan,
82         enum nl80211_channel_type channel_type)
83 {
84         struct lbs_private *priv = wiphy_priv(wiphy);
85         int ret = -ENOTSUPP;
86
87         lbs_deb_enter_args(LBS_DEB_CFG80211, "freq %d, type %d", chan->center_freq, channel_type);
88
89         if (channel_type != NL80211_CHAN_NO_HT)
90                 goto out;
91
92         ret = lbs_set_channel(priv, chan->hw_value);
93
94  out:
95         lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
96         return ret;
97 }
98
99
100
101
102 static struct cfg80211_ops lbs_cfg80211_ops = {
103         .set_channel = lbs_cfg_set_channel,
104 };
105
106
107 /*
108  * At this time lbs_private *priv doesn't even exist, so we just allocate
109  * memory and don't initialize the wiphy further. This is postponed until we
110  * can talk to the firmware and happens at registration time in
111  * lbs_cfg_wiphy_register().
112  */
113 struct wireless_dev *lbs_cfg_alloc(struct device *dev)
114 {
115         int ret = 0;
116         struct wireless_dev *wdev;
117
118         lbs_deb_enter(LBS_DEB_CFG80211);
119
120         wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
121         if (!wdev) {
122                 dev_err(dev, "cannot allocate wireless device\n");
123                 return ERR_PTR(-ENOMEM);
124         }
125
126         wdev->wiphy = wiphy_new(&lbs_cfg80211_ops, sizeof(struct lbs_private));
127         if (!wdev->wiphy) {
128                 dev_err(dev, "cannot allocate wiphy\n");
129                 ret = -ENOMEM;
130                 goto err_wiphy_new;
131         }
132
133         lbs_deb_leave(LBS_DEB_CFG80211);
134         return wdev;
135
136  err_wiphy_new:
137         kfree(wdev);
138         lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
139         return ERR_PTR(ret);
140 }
141
142
143 /*
144  * This function get's called after lbs_setup_firmware() determined the
145  * firmware capabities. So we can setup the wiphy according to our
146  * hardware/firmware.
147  */
148 int lbs_cfg_register(struct lbs_private *priv)
149 {
150         struct wireless_dev *wdev = priv->wdev;
151         int ret;
152
153         lbs_deb_enter(LBS_DEB_CFG80211);
154
155         wdev->wiphy->max_scan_ssids = 1;
156         wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
157
158         /* TODO: BIT(NL80211_IFTYPE_ADHOC); */
159         wdev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
160
161         /* TODO: honor priv->regioncode */
162         wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &lbs_band_2ghz;
163
164         /*
165          * We could check priv->fwcapinfo && FW_CAPINFO_WPA, but I have
166          * never seen a firmware without WPA
167          */
168         wdev->wiphy->cipher_suites = cipher_suites;
169         wdev->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
170
171         ret = wiphy_register(wdev->wiphy);
172         if (ret < 0)
173                 lbs_pr_err("cannot register wiphy device\n");
174
175         ret = register_netdev(priv->dev);
176         if (ret)
177                 lbs_pr_err("cannot register network device\n");
178
179         lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
180         return ret;
181 }
182
183
184 void lbs_cfg_free(struct lbs_private *priv)
185 {
186         struct wireless_dev *wdev = priv->wdev;
187
188         lbs_deb_enter(LBS_DEB_CFG80211);
189
190         if (!wdev)
191                 return;
192
193         if (wdev->wiphy) {
194                 wiphy_unregister(wdev->wiphy);
195                 wiphy_free(wdev->wiphy);
196         }
197         kfree(wdev);
198 }