rtl8187: Change detection of RTL8187B with USB ID of 8187

Some early versions of RTL8187B devices have a USB ID of 0x8187
rather than the 0x8189 of later models. In addition, it appears
that these early units also must be programmed with lower power.
Previous patches used the Product ID string to detect this situation,
but did not address the low power question. This patch uses the
hardware version and sets the power accordingly.

Signed-off-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtl8187_dev.c

@@ -981,8 +981,7 @@ static int __devinit rtl8187_probe(struct usb_interface *intf,
 	}
 
 	priv = dev->priv;
-	priv->is_rtl8187b = (id->driver_info == DEVICE_RTL8187B) ||
-			    !memcmp(udev->product, "RTL8187B", 8);
+	priv->is_rtl8187b = (id->driver_info == DEVICE_RTL8187B);
 
 	SET_IEEE80211_DEV(dev, &intf->dev);
 	usb_set_intfdata(intf, dev);
@@ -1011,13 +1010,6 @@ static int __devinit rtl8187_probe(struct usb_interface *intf,
 	dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 		     IEEE80211_HW_RX_INCLUDES_FCS |
 		     IEEE80211_HW_SIGNAL_UNSPEC;
-	dev->extra_tx_headroom = (!priv->is_rtl8187b) ?
-				  sizeof(struct rtl8187_tx_hdr) :
-				  sizeof(struct rtl8187b_tx_hdr);
-	if (!priv->is_rtl8187b)
-		dev->queues = 1;
-	else
-		dev->queues = 4;
 	dev->max_signal = 65;
 
 	eeprom.data = dev;
@@ -1052,26 +1044,6 @@ static int __devinit rtl8187_probe(struct usb_interface *intf,
 		(*channel++).hw_value = txpwr & 0xFF;
 		(*channel++).hw_value = txpwr >> 8;
 	}
-	if (!priv->is_rtl8187b) {
-		for (i = 0; i < 2; i++) {
-			eeprom_93cx6_read(&eeprom,
-					  RTL8187_EEPROM_TXPWR_CHAN_6 + i,
-					  &txpwr);
-			(*channel++).hw_value = txpwr & 0xFF;
-			(*channel++).hw_value = txpwr >> 8;
-		}
-	} else {
-		eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6,
-				  &txpwr);
-		(*channel++).hw_value = txpwr & 0xFF;
-
-		eeprom_93cx6_read(&eeprom, 0x0A, &txpwr);
-		(*channel++).hw_value = txpwr & 0xFF;
-
-		eeprom_93cx6_read(&eeprom, 0x1C, &txpwr);
-		(*channel++).hw_value = txpwr & 0xFF;
-		(*channel++).hw_value = txpwr >> 8;
-	}
 
 	eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
 			  &priv->txpwr_base);
@@ -1090,17 +1062,20 @@ static int __devinit rtl8187_probe(struct usb_interface *intf,
 		reg32 = rtl818x_ioread32(priv, &priv->map->TX_CONF);
 		reg32 &= RTL818X_TX_CONF_HWVER_MASK;
 		switch (reg32) {
-		case RTL818X_TX_CONF_R8187vD_1:
-		case RTL818X_TX_CONF_R8187vD_2:
+		case RTL818X_TX_CONF_R8187vD_B:
+			/* Some RTL8187B devices have a USB ID of 0x8187
+			 * detect them here */
+			chip_name = "RTL8187BvB(early)";
+			priv->is_rtl8187b = 1;
+			priv->hw_rev = RTL8187BvB;
+			break;
+		case RTL818X_TX_CONF_R8187vD:
 			chip_name = "RTL8187vD";
 			break;
 		default:
 			chip_name = "RTL8187vB (default)";
 		}
        } else {
-		printk(KERN_WARNING "rtl8187: 8187B chip detected. Support "
-			"is EXPERIMENTAL, and could damage your\n"
-			"         hardware, use at your own risk\n");
 		/*
 		 * Force USB request to write radio registers for 8187B, Realtek
 		 * only uses it in their sources
@@ -1129,7 +1104,43 @@ static int __devinit rtl8187_probe(struct usb_interface *intf,
 		}
 	}
 
+	if (!priv->is_rtl8187b) {
+		for (i = 0; i < 2; i++) {
+			eeprom_93cx6_read(&eeprom,
+					  RTL8187_EEPROM_TXPWR_CHAN_6 + i,
+					  &txpwr);
+			(*channel++).hw_value = txpwr & 0xFF;
+			(*channel++).hw_value = txpwr >> 8;
+		}
+	} else {
+		eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6,
+				  &txpwr);
+		(*channel++).hw_value = txpwr & 0xFF;
+
+		eeprom_93cx6_read(&eeprom, 0x0A, &txpwr);
+		(*channel++).hw_value = txpwr & 0xFF;
+
+		eeprom_93cx6_read(&eeprom, 0x1C, &txpwr);
+		(*channel++).hw_value = txpwr & 0xFF;
+		(*channel++).hw_value = txpwr >> 8;
+	}
+
+	if (priv->is_rtl8187b)
+		printk(KERN_WARNING "rtl8187: 8187B chip detected. Support "
+			"is EXPERIMENTAL, and could damage your\n"
+			"         hardware, use at your own risk\n");
+	if ((id->driver_info == DEVICE_RTL8187) && priv->is_rtl8187b)
+		printk(KERN_INFO "rtl8187: inconsistency between id with OEM"
+		       " info!\n");
+
 	priv->rf = rtl8187_detect_rf(dev);
+	dev->extra_tx_headroom = (!priv->is_rtl8187b) ?
+				  sizeof(struct rtl8187_tx_hdr) :
+				  sizeof(struct rtl8187b_tx_hdr);
+	if (!priv->is_rtl8187b)
+		dev->queues = 1;
+	else
+		dev->queues = 4;
 
 	err = ieee80211_register_hw(dev);
 	if (err) {

drivers/net/wireless/rtl818x.h

@@ -66,8 +66,8 @@ struct rtl818x_csr {
 #define RTL818X_TX_CONF_R8180_F		(3 << 25)
 #define RTL818X_TX_CONF_R8185_ABC	(4 << 25)
 #define RTL818X_TX_CONF_R8185_D		(5 << 25)
-#define RTL818X_TX_CONF_R8187vD_1	(5 << 25)
-#define RTL818X_TX_CONF_R8187vD_2	(6 << 25)
+#define RTL818X_TX_CONF_R8187vD		(5 << 25)
+#define RTL818X_TX_CONF_R8187vD_B	(6 << 25)
 #define RTL818X_TX_CONF_HWVER_MASK	(7 << 25)
 #define RTL818X_TX_CONF_DISREQQSIZE	(1 << 28)
 #define RTL818X_TX_CONF_PROBE_DTS	(1 << 29)