rtl8180: prepare to handle more than two chip types

Currently a "r8185" integer variable is used as a boolean flag to
indicate whether the card is a rtl8185 or not.
Since now the driver supports only rtl8185 and rtl8180 cards, if
"r8185" variable is zero then the card is implicitly assumed to
be a rtl8180.

Now I'm preparing to add support for a third card type (rtl8187se).

This patch changes the "r8185" flag with an enum variable to
explicitly indicate which card type we have.

I'm submitting this this patch now, even if I still have to submit
other patches that not pertain with rtl8187se support, because
IMHO it's not worth rebasing them on the current code, using r8185
flag, and then changing them back again nearly immediately.
BTW if someone feels I really should do this, please tell me..

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtl818x/rtl8180/dev.c

@@ -148,7 +148,8 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
 			rx_status.antenna = (flags2 >> 15) & 1;
 			rx_status.rate_idx = (flags >> 20) & 0xF;
 			agc = (flags2 >> 17) & 0x7F;
-			if (priv->r8185) {
+
+			if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
 				if (rx_status.rate_idx > 3)
 					signal = 90 - clamp_t(u8, agc, 25, 90);
 				else
@@ -288,7 +289,7 @@ static void rtl8180_tx(struct ieee80211_hw *dev,
 		   (ieee80211_get_tx_rate(dev, info)->hw_value << 24) |
 		   skb->len;
 
-	if (priv->r8185)
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
 		tx_flags |= RTL818X_TX_DESC_FLAG_DMA |
 			    RTL818X_TX_DESC_FLAG_NO_ENC;
 
@@ -305,7 +306,7 @@ static void rtl8180_tx(struct ieee80211_hw *dev,
 		rts_duration = ieee80211_rts_duration(dev, priv->vif, skb->len,
 						      info);
 
-	if (!priv->r8185) {
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
 		unsigned int remainder;
 
 		plcp_len = DIV_ROUND_UP(16 * (skb->len + 4),
@@ -412,7 +413,7 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 
 	rtl818x_iowrite8(priv, &priv->map->MSR, 0);
 
-	if (!priv->r8185)
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
 		rtl8180_set_anaparam(priv, priv->anaparam);
 
 	rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
@@ -425,7 +426,7 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
 	rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg & ~(1 << 3));
-	if (priv->r8185) {
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
 		reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
 		rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg | (1 << 4));
 	}
@@ -437,7 +438,7 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 
 	rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
 
-	if (priv->r8185) {
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
 		rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
 		rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
 		rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
@@ -460,7 +461,7 @@ static int rtl8180_init_hw(struct ieee80211_hw *dev)
 	}
 
 	priv->rf->init(dev);
-	if (priv->r8185)
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185)
 		rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
 	return 0;
 }
@@ -624,7 +625,7 @@ static int rtl8180_start(struct ieee80211_hw *dev)
 	      RTL818X_RX_CONF_BROADCAST |
 	      RTL818X_RX_CONF_NICMAC;
 
-	if (priv->r8185)
+	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185)
 		reg |= RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2;
 	else {
 		reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE1)
@@ -636,7 +637,7 @@ static int rtl8180_start(struct ieee80211_hw *dev)
 	priv->rx_conf = reg;
 	rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
 
-	if (priv->r8185) {
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
 		reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
 
 		/* CW is not on per-packet basis.
@@ -668,7 +669,9 @@ static int rtl8180_start(struct ieee80211_hw *dev)
 	reg |= (6 << 21 /* MAX TX DMA */) |
 	       RTL818X_TX_CONF_NO_ICV;
 
-	if (priv->r8185)
+
+
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
 		reg &= ~RTL818X_TX_CONF_PROBE_DTS;
 	else
 		reg &= ~RTL818X_TX_CONF_HW_SEQNUM;
@@ -1052,15 +1055,22 @@ static int rtl8180_probe(struct pci_dev *pdev,
 	switch (reg) {
 	case RTL818X_TX_CONF_R8180_ABCD:
 		chip_name = "RTL8180";
+		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
 		break;
+
 	case RTL818X_TX_CONF_R8180_F:
 		chip_name = "RTL8180vF";
+		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
 		break;
+
 	case RTL818X_TX_CONF_R8185_ABC:
 		chip_name = "RTL8185";
+		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
 		break;
+
 	case RTL818X_TX_CONF_R8185_D:
 		chip_name = "RTL8185vD";
+		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
 		break;
 	default:
 		printk(KERN_ERR "%s (rtl8180): Unknown chip! (0x%x)\n",
@@ -1068,8 +1078,7 @@ static int rtl8180_probe(struct pci_dev *pdev,
 		goto err_iounmap;
 	}
 
-	priv->r8185 = reg & RTL818X_TX_CONF_R8185_ABC;
-	if (priv->r8185) {
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
 		priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
 		pci_try_set_mwi(pdev);
 	}
@@ -1118,7 +1127,7 @@ static int rtl8180_probe(struct pci_dev *pdev,
 
 	eeprom_93cx6_read(&eeprom, 0x17, &eeprom_val);
 	priv->csthreshold = eeprom_val >> 8;
-	if (!priv->r8185) {
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8185) {
 		__le32 anaparam;
 		eeprom_93cx6_multiread(&eeprom, 0xD, (__le16 *)&anaparam, 2);
 		priv->anaparam = le32_to_cpu(anaparam);
@@ -1142,7 +1151,7 @@ static int rtl8180_probe(struct pci_dev *pdev,
 	}
 
 	/* OFDM TX power */
-	if (priv->r8185) {
+	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
 		for (i = 0; i < 14; i += 2) {
 			u16 txpwr;
 			eeprom_93cx6_read(&eeprom, 0x20 + (i >> 1), &txpwr);

drivers/net/wireless/rtl818x/rtl8180/rtl8180.h

@@ -82,7 +82,11 @@ struct rtl8180_priv {
 	struct pci_dev *pdev;
 	u32 rx_conf;
 
-	int r8185;
+	enum {
+		RTL818X_CHIP_FAMILY_RTL8180,
+		RTL818X_CHIP_FAMILY_RTL8185,
+		RTL818X_CHIP_FAMILY_RTL8187SE
+	} chip_family;
 	u32 anaparam;
 	u16 rfparam;
 	u8 csthreshold;