cfg80211 API for channels/bitrates, mac80211 and driver conversion

This patch creates new cfg80211 wiphy API for channel and bitrate
registration and converts mac80211 and drivers to the new API. The
old mac80211 API is completely ripped out. All drivers (except ath5k)
are updated to the new API, in many cases I expect that optimisations
can be done.

Along with the regulatory code I've also ripped out the
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED flag, I believe it to be
unnecessary if the hardware simply gives us whatever channels it wants
to support and we then enable/disable them as required, which is pretty
much required for travelling.

Additionally, the patch adds proper "basic" rate handling for STA
mode interface, AP mode interface will have to have new API added
to allow userspace to set the basic rate set, currently it'll be
empty... However, the basic rate handling will need to be moved to
the BSS conf stuff.

I do expect there to be bugs in this, especially wrt. transmit
power handling where I'm basically clueless about how it should work.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 48 insertions, 26 deletions

diff --git a/drivers/net/wireless/p54common.c b/drivers/net/wireless/p54common.c
index 5cda49aff3a..218ff7770ef 100644
--- a/drivers/net/wireless/p54common.c
+++ b/drivers/net/wireless/p54common.c
@@ -27,6 +27,46 @@ MODULE_DESCRIPTION("Softmac Prism54 common code");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("prism54common");
 
+static struct ieee80211_rate p54_rates[] = {
+	{ .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 60, .hw_value = 4, },
+	{ .bitrate = 90, .hw_value = 5, },
+	{ .bitrate = 120, .hw_value = 6, },
+	{ .bitrate = 180, .hw_value = 7, },
+	{ .bitrate = 240, .hw_value = 8, },
+	{ .bitrate = 360, .hw_value = 9, },
+	{ .bitrate = 480, .hw_value = 10, },
+	{ .bitrate = 540, .hw_value = 11, },
+};
+
+static struct ieee80211_channel p54_channels[] = {
+	{ .center_freq = 2412, .hw_value = 1, },
+	{ .center_freq = 2417, .hw_value = 2, },
+	{ .center_freq = 2422, .hw_value = 3, },
+	{ .center_freq = 2427, .hw_value = 4, },
+	{ .center_freq = 2432, .hw_value = 5, },
+	{ .center_freq = 2437, .hw_value = 6, },
+	{ .center_freq = 2442, .hw_value = 7, },
+	{ .center_freq = 2447, .hw_value = 8, },
+	{ .center_freq = 2452, .hw_value = 9, },
+	{ .center_freq = 2457, .hw_value = 10, },
+	{ .center_freq = 2462, .hw_value = 11, },
+	{ .center_freq = 2467, .hw_value = 12, },
+	{ .center_freq = 2472, .hw_value = 13, },
+	{ .center_freq = 2484, .hw_value = 14, },
+};
+
+struct ieee80211_supported_band band_2GHz = {
+	.channels = p54_channels,
+	.n_channels = ARRAY_SIZE(p54_channels),
+	.bitrates = p54_rates,
+	.n_bitrates = ARRAY_SIZE(p54_rates),
+};
+
+
 void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 {
 	struct p54_common *priv = dev->priv;
@@ -308,10 +348,10 @@ static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 	u16 freq = le16_to_cpu(hdr->freq);
 
 	rx_status.ssi = hdr->rssi;
-	rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
-	rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
+	/* XX correct? */
+	rx_status.rate_idx = hdr->rate & 0xf;
 	rx_status.freq = freq;
-	rx_status.phymode = MODE_IEEE80211G;
+	rx_status.band = IEEE80211_BAND_2GHZ;
 	rx_status.antenna = hdr->antenna;
 	rx_status.mactime = le64_to_cpu(hdr->timestamp);
 	rx_status.flag |= RX_FLAG_TSFT;
@@ -547,7 +587,9 @@ static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 	txhdr->padding2 = 0;
 
 	/* TODO: add support for alternate retry TX rates */
-	rate = control->tx_rate;
+	rate = control->tx_rate->hw_value;
+	if (control->flags & IEEE80211_TXCTL_SHORT_PREAMBLE)
+		rate |= 0x10;
 	if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
 		rate |= 0x40;
 	else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
@@ -849,7 +891,7 @@ static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 {
 	int ret;
 
-	ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
+	ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
 	p54_set_vdcf(dev);
 	return ret;
 }
@@ -944,7 +986,6 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 {
 	struct ieee80211_hw *dev;
 	struct p54_common *priv;
-	int i;
 
 	dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
 	if (!dev)
@@ -953,18 +994,7 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 	priv = dev->priv;
 	priv->mode = IEEE80211_IF_TYPE_INVALID;
 	skb_queue_head_init(&priv->tx_queue);
-	memcpy(priv->channels, p54_channels, sizeof(p54_channels));
-	memcpy(priv->rates, p54_rates, sizeof(p54_rates));
-	priv->modes[1].mode = MODE_IEEE80211B;
-	priv->modes[1].num_rates = 4;
-	priv->modes[1].rates = priv->rates;
-	priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
-	priv->modes[1].channels = priv->channels;
-	priv->modes[0].mode = MODE_IEEE80211G;
-	priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
-	priv->modes[0].rates = priv->rates;
-	priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
-	priv->modes[0].channels = priv->channels;
+	dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
 		    IEEE80211_HW_RX_INCLUDES_FCS;
 	dev->channel_change_time = 1000;	/* TODO: find actual value */
@@ -986,14 +1016,6 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 
 	p54_init_vdcf(dev);
 
-	for (i = 0; i < 2; i++) {
-		if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
-			kfree(priv->cached_vdcf);
-			ieee80211_free_hw(dev);
-			return NULL;
-		}
-	}
-
 	return dev;
 }
 EXPORT_SYMBOL_GPL(p54_init_common);