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, 62 insertions, 31 deletions

diff --git a/drivers/net/wireless/rtl8180_dev.c b/drivers/net/wireless/rtl8180_dev.c
index 5e9a8ace0d8..d0928c91c21 100644
--- a/drivers/net/wireless/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl8180_dev.c
@@ -49,6 +49,41 @@ static struct pci_device_id rtl8180_table[] __devinitdata = {
 
 MODULE_DEVICE_TABLE(pci, rtl8180_table);
 
+static const struct ieee80211_rate rtl818x_rates[] = {
+	{ .bitrate = 10, .hw_value = 0, },
+	{ .bitrate = 20, .hw_value = 1, },
+	{ .bitrate = 55, .hw_value = 2, },
+	{ .bitrate = 110, .hw_value = 3, },
+	{ .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 const struct ieee80211_channel rtl818x_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 },
+};
+
+
+
+
 void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
 {
 	struct rtl8180_priv *priv = dev->priv;
@@ -99,10 +134,10 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
 			/* TODO: improve signal/rssi reporting */
 			rx_status.signal = flags2 & 0xFF;
 			rx_status.ssi = (flags2 >> 8) & 0x7F;
-			rx_status.rate = (flags >> 20) & 0xF;
-			rx_status.freq = dev->conf.freq;
-			rx_status.channel = dev->conf.channel;
-			rx_status.phymode = dev->conf.phymode;
+			/* XXX: is this correct? */
+			rx_status.rate_idx = (flags >> 20) & 0xF;
+			rx_status.freq = dev->conf.channel->center_freq;
+			rx_status.band = dev->conf.channel->band;
 			rx_status.mactime = le64_to_cpu(entry->tsft);
 			rx_status.flag |= RX_FLAG_TSFT;
 			if (flags & RTL8180_RX_DESC_FLAG_CRC32_ERR)
@@ -223,8 +258,9 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 				 skb->len, PCI_DMA_TODEVICE);
 
 	tx_flags = RTL8180_TX_DESC_FLAG_OWN | RTL8180_TX_DESC_FLAG_FS |
-		   RTL8180_TX_DESC_FLAG_LS | (control->tx_rate << 24) |
-		   (control->rts_cts_rate << 19) | skb->len;
+		   RTL8180_TX_DESC_FLAG_LS |
+		   (control->tx_rate->hw_value << 24) |
+		   (control->rts_cts_rate->hw_value << 19) | skb->len;
 
 	if (priv->r8185)
 		tx_flags |= RTL8180_TX_DESC_FLAG_DMA |
@@ -246,9 +282,9 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 		unsigned int remainder;
 
 		plcp_len = DIV_ROUND_UP(16 * (skb->len + 4),
-					(control->rate->rate * 2) / 10);
+					(control->tx_rate->bitrate * 2) / 10);
 		remainder = (16 * (skb->len + 4)) %
-			    ((control->rate->rate * 2) / 10);
+			    ((control->tx_rate->bitrate * 2) / 10);
 		if (remainder > 0 && remainder <= 6)
 			plcp_len |= 1 << 15;
 	}
@@ -261,8 +297,8 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 	entry->plcp_len = cpu_to_le16(plcp_len);
 	entry->tx_buf = cpu_to_le32(mapping);
 	entry->frame_len = cpu_to_le32(skb->len);
-	entry->flags2 = control->alt_retry_rate != -1 ?
-			control->alt_retry_rate << 4 : 0;
+	entry->flags2 = control->alt_retry_rate != NULL ?
+			control->alt_retry_rate->bitrate << 4 : 0;
 	entry->retry_limit = control->retry_limit;
 	entry->flags = cpu_to_le32(tx_flags);
 	__skb_queue_tail(&ring->queue, skb);
@@ -838,19 +874,19 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
 		goto err_free_dev;
 	}
 
+	BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
+	BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));
+
 	memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
 	memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
-	priv->modes[0].mode = MODE_IEEE80211G;
-	priv->modes[0].num_rates = ARRAY_SIZE(rtl818x_rates);
-	priv->modes[0].rates = priv->rates;
-	priv->modes[0].num_channels = ARRAY_SIZE(rtl818x_channels);
-	priv->modes[0].channels = priv->channels;
-	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(rtl818x_channels);
-	priv->modes[1].channels = priv->channels;
-	priv->mode = IEEE80211_IF_TYPE_INVALID;
+
+	priv->band.band = IEEE80211_BAND_2GHZ;
+	priv->band.channels = priv->channels;
+	priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
+	priv->band.bitrates = priv->rates;
+	priv->band.n_bitrates = 4;
+	dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
+
 	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 		     IEEE80211_HW_RX_INCLUDES_FCS;
 	dev->queues = 1;
@@ -879,15 +915,10 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
 
 	priv->r8185 = reg & RTL818X_TX_CONF_R8185_ABC;
 	if (priv->r8185) {
-		if ((err = ieee80211_register_hwmode(dev, &priv->modes[0])))
-			goto err_iounmap;
-
+		priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
 		pci_try_set_mwi(pdev);
 	}
 
-	if ((err = ieee80211_register_hwmode(dev, &priv->modes[1])))
-		goto err_iounmap;
-
 	eeprom.data = dev;
 	eeprom.register_read = rtl8180_eeprom_register_read;
 	eeprom.register_write = rtl8180_eeprom_register_write;
@@ -950,8 +981,8 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
 	for (i = 0; i < 14; i += 2) {
 		u16 txpwr;
 		eeprom_93cx6_read(&eeprom, 0x10 + (i >> 1), &txpwr);
-		priv->channels[i].val = txpwr & 0xFF;
-		priv->channels[i + 1].val = txpwr >> 8;
+		priv->channels[i].hw_value = txpwr & 0xFF;
+		priv->channels[i + 1].hw_value = txpwr >> 8;
 	}
 
 	/* OFDM TX power */
@@ -959,8 +990,8 @@ static int __devinit rtl8180_probe(struct pci_dev *pdev,
 		for (i = 0; i < 14; i += 2) {
 			u16 txpwr;
 			eeprom_93cx6_read(&eeprom, 0x20 + (i >> 1), &txpwr);
-			priv->channels[i].val |= (txpwr & 0xFF) << 8;
-			priv->channels[i + 1].val |= txpwr & 0xFF00;
+			priv->channels[i].hw_value |= (txpwr & 0xFF) << 8;
+			priv->channels[i + 1].hw_value |= txpwr & 0xFF00;
 		}
 	}