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, 45 insertions, 35 deletions

diff --git a/drivers/net/wireless/adm8211.c b/drivers/net/wireless/adm8211.c
index 79796186713..7d4218206c4 100644
--- a/drivers/net/wireless/adm8211.c
+++ b/drivers/net/wireless/adm8211.c
@@ -48,6 +48,32 @@ static struct pci_device_id adm8211_pci_id_table[] __devinitdata = {
 	{ 0 }
 };
 
+static struct ieee80211_rate adm8211_rates[] = {
+	{ .bitrate = 10, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 220, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, /* XX ?? */
+};
+
+static const struct ieee80211_channel adm8211_channels[] = {
+	{ .center_freq = 2412},
+	{ .center_freq = 2417},
+	{ .center_freq = 2422},
+	{ .center_freq = 2427},
+	{ .center_freq = 2432},
+	{ .center_freq = 2437},
+	{ .center_freq = 2442},
+	{ .center_freq = 2447},
+	{ .center_freq = 2452},
+	{ .center_freq = 2457},
+	{ .center_freq = 2462},
+	{ .center_freq = 2467},
+	{ .center_freq = 2472},
+	{ .center_freq = 2484},
+};
+
+
 static void adm8211_eeprom_register_read(struct eeprom_93cx6 *eeprom)
 {
 	struct adm8211_priv *priv = eeprom->data;
@@ -155,17 +181,17 @@ static int adm8211_read_eeprom(struct ieee80211_hw *dev)
 	printk(KERN_DEBUG "%s (adm8211): Channel range: %d - %d\n",
 	       pci_name(priv->pdev), (int)chan_range.min, (int)chan_range.max);
 
-	priv->modes[0].num_channels = chan_range.max - chan_range.min + 1;
-	priv->modes[0].channels = priv->channels;
+	BUILD_BUG_ON(sizeof(priv->channels) != sizeof(adm8211_channels));
 
-	memcpy(priv->channels, adm8211_channels, sizeof(adm8211_channels));
+	memcpy(priv->channels, adm8211_channels, sizeof(priv->channels));
+	priv->band.channels = priv->channels;
+	priv->band.n_channels = ARRAY_SIZE(adm8211_channels);
+	priv->band.bitrates = adm8211_rates;
+	priv->band.n_bitrates = ARRAY_SIZE(adm8211_rates);
 
 	for (i = 1; i <= ARRAY_SIZE(adm8211_channels); i++)
-		if (i >= chan_range.min && i <= chan_range.max)
-			priv->channels[i - 1].flag =
-				IEEE80211_CHAN_W_SCAN |
-				IEEE80211_CHAN_W_ACTIVE_SCAN |
-				IEEE80211_CHAN_W_IBSS;
+		if (i < chan_range.min || i > chan_range.max)
+			priv->channels[i - 1].flags |= IEEE80211_CHAN_DISABLED;
 
 	switch (priv->eeprom->specific_bbptype) {
 	case ADM8211_BBP_RFMD3000:
@@ -347,7 +373,6 @@ static void adm8211_interrupt_rci(struct ieee80211_hw *dev)
 	unsigned int pktlen;
 	struct sk_buff *skb, *newskb;
 	unsigned int limit = priv->rx_ring_size;
-	static const u8 rate_tbl[] = {10, 20, 55, 110, 220};
 	u8 rssi, rate;
 
 	while (!(priv->rx_ring[entry].status & cpu_to_le32(RDES0_STATUS_OWN))) {
@@ -425,12 +450,10 @@ static void adm8211_interrupt_rci(struct ieee80211_hw *dev)
 			else
 				rx_status.ssi = 100 - rssi;
 
-			if (rate <= 4)
-				rx_status.rate = rate_tbl[rate];
+			rx_status.rate_idx = rate;
 
-			rx_status.channel = priv->channel;
-			rx_status.freq = adm8211_channels[priv->channel - 1].freq;
-			rx_status.phymode = MODE_IEEE80211B;
+			rx_status.freq = adm8211_channels[priv->channel - 1].center_freq;
+			rx_status.band = IEEE80211_BAND_2GHZ;
 
 			ieee80211_rx_irqsafe(dev, skb, &rx_status);
 		}
@@ -1054,7 +1077,7 @@ static int adm8211_set_rate(struct ieee80211_hw *dev)
 	if (priv->pdev->revision != ADM8211_REV_BA) {
 		rate_buf[0] = ARRAY_SIZE(adm8211_rates);
 		for (i = 0; i < ARRAY_SIZE(adm8211_rates); i++)
-			rate_buf[i + 1] = (adm8211_rates[i].rate / 5) | 0x80;
+			rate_buf[i + 1] = (adm8211_rates[i].bitrate / 5) | 0x80;
 	} else {
 		/* workaround for rev BA specific bug */
 		rate_buf[0] = 0x04;
@@ -1303,9 +1326,10 @@ static int adm8211_set_ssid(struct ieee80211_hw *dev, u8 *ssid, size_t ssid_len)
 static int adm8211_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 {
 	struct adm8211_priv *priv = dev->priv;
+	int channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 
-	if (conf->channel != priv->channel) {
-		priv->channel = conf->channel;
+	if (channel != priv->channel) {
+		priv->channel = channel;
 		adm8211_rf_set_channel(dev, priv->channel);
 	}
 
@@ -1680,10 +1704,10 @@ static int adm8211_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 
 	if (control->tx_rate < 0) {
 		short_preamble = 1;
-		plcp_signal = -control->tx_rate;
+		plcp_signal = -control->tx_rate->bitrate;
 	} else {
 		short_preamble = 0;
-		plcp_signal = control->tx_rate;
+		plcp_signal = control->tx_rate->bitrate;
 	}
 
 	hdr = (struct ieee80211_hdr *)skb->data;
@@ -1880,18 +1904,11 @@ static int __devinit adm8211_probe(struct pci_dev *pdev,
 	SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 
 	dev->extra_tx_headroom = sizeof(struct adm8211_tx_hdr);
-	dev->flags = IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED;
-	/* IEEE80211_HW_RX_INCLUDES_FCS in promisc mode */
+	/* dev->flags = IEEE80211_HW_RX_INCLUDES_FCS in promisc mode */
 
 	dev->channel_change_time = 1000;
 	dev->max_rssi = 100;	/* FIXME: find better value */
 
-	priv->modes[0].mode = MODE_IEEE80211B;
-	/* channel info filled in by adm8211_read_eeprom */
-	memcpy(priv->rates, adm8211_rates, sizeof(adm8211_rates));
-	priv->modes[0].num_rates = ARRAY_SIZE(adm8211_rates);
-	priv->modes[0].rates = priv->rates;
-
 	dev->queues = 1; /* ADM8211C supports more, maybe ADM8211B too */
 
 	priv->retry_limit = 3;
@@ -1917,14 +1934,7 @@ static int __devinit adm8211_probe(struct pci_dev *pdev,
 		goto err_free_desc;
 	}
 
-	priv->channel = priv->modes[0].channels[0].chan;
-
-	err = ieee80211_register_hwmode(dev, &priv->modes[0]);
-	if (err) {
-		printk(KERN_ERR "%s (adm8211): Can't register hwmode\n",
-		       pci_name(pdev));
-		goto err_free_desc;
-	}
+	priv->channel = 1;
 
 	err = ieee80211_register_hw(dev);
 	if (err) {