[PATCH] ns83820 update

Changes:
- improved DAC ifdefs from Andi Kleen
- removal of dead code from Adrian Bunk
- fix half duplex collision behaviour

drivers/net/ns83820.c

-#define _VERSION "0.20"
+#define VERSION "0.22"
 /* ns83820.c by Benjamin LaHaise with contributions.
  *
  * Questions/comments/discussion to linux-ns83820@kvack.org.
@@ -63,9 +63,11 @@
  *			     -	fix missed txok introduced during performance
  *				tuning
  *			0.20 -	fix stupid RFEN thinko.  i am such a smurf.
- *
  *	20040828	0.21 -	add hardware vlan accleration
  *				by Neil Horman <nhorman@redhat.com>
+ *	20050406	0.22 -	improved DAC ifdefs from Andi Kleen	
+ *			     -	removal of dead code from Adrian Bunk
+ *			     -	fix half duplex collision behaviour
  * Driver Overview
  * ===============
  *
@@ -129,18 +131,6 @@ static int lnksts = 0;		/* CFG_LNKSTS bit polarity */
 #undef Dprintk
 #define	Dprintk			dprintk
 
-#if defined(CONFIG_HIGHMEM64G) || defined(__ia64__)
-#define USE_64BIT_ADDR	"+"
-#endif
-
-#if defined(USE_64BIT_ADDR)
-#define	VERSION	_VERSION USE_64BIT_ADDR
-#define TRY_DAC	1
-#else
-#define	VERSION	_VERSION
-#define TRY_DAC	0
-#endif
-
 /* tunables */
 #define RX_BUF_SIZE	1500	/* 8192 */
 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
@@ -386,22 +376,16 @@ static int lnksts = 0;		/* CFG_LNKSTS bit polarity */
 #define LINK_DOWN		0x02
 #define LINK_UP			0x04
 
-#ifdef USE_64BIT_ADDR
-#define HW_ADDR_LEN	8
+#define HW_ADDR_LEN	sizeof(dma_addr_t) 
 #define desc_addr_set(desc, addr)				\
 	do {							\
-		u64 __addr = (addr);				\
-		(desc)[0] = cpu_to_le32(__addr);		\
-		(desc)[1] = cpu_to_le32(__addr >> 32);		\
+		((desc)[0] = cpu_to_le32(addr));		\
+		if (HW_ADDR_LEN == 8)		 		\
+			(desc)[1] = cpu_to_le32(((u64)addr) >> 32);	\
 	} while(0)
 #define desc_addr_get(desc)					\
-		(((u64)le32_to_cpu((desc)[1]) << 32)		\
-		     | le32_to_cpu((desc)[0]))
-#else
-#define HW_ADDR_LEN	4
-#define desc_addr_set(desc, addr)	((desc)[0] = cpu_to_le32(addr))
-#define desc_addr_get(desc)		(le32_to_cpu((desc)[0]))
-#endif
+	(le32_to_cpu((desc)[0]) | \
+	(HW_ADDR_LEN == 8 ? ((dma_addr_t)le32_to_cpu((desc)[1]))<<32 : 0))
 
 #define DESC_LINK		0
 #define DESC_BUFPTR		(DESC_LINK + HW_ADDR_LEN/4)
@@ -727,11 +711,23 @@ static void fastcall phy_intr(struct net_device *ndev)
 		speed = ((cfg / CFG_SPDSTS0) & 3);
 		fullduplex = (cfg & CFG_DUPSTS);
 
-		if (fullduplex)
+		if (fullduplex) {
 			new_cfg |= CFG_SB;
+			writel(readl(dev->base + TXCFG)
+					| TXCFG_CSI | TXCFG_HBI,
+			       dev->base + TXCFG);
+			writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
+			       dev->base + RXCFG);
+		} else {
+			writel(readl(dev->base + TXCFG)
+					& ~(TXCFG_CSI | TXCFG_HBI),
+			       dev->base + TXCFG);
+			writel(readl(dev->base + RXCFG) & ~(RXCFG_RX_FD),
+			       dev->base + RXCFG);
+		}
 
 		if ((cfg & CFG_LNKSTS) &&
-		    ((new_cfg ^ dev->CFG_cache) & CFG_MODE_1000)) {
+		    ((new_cfg ^ dev->CFG_cache) != 0)) {
 			writel(new_cfg, dev->base + CFG);
 			dev->CFG_cache = new_cfg;
 		}
@@ -1189,7 +1185,6 @@ static int ns83820_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	for (;;) {
 		volatile u32 *desc = dev->tx_descs + (free_idx * DESC_SIZE);
-		u32 residue = 0;
 
 		dprintk("frag[%3u]: %4u @ 0x%08Lx\n", free_idx, len,
 			(unsigned long long)buf);
@@ -1199,17 +1194,11 @@ static int ns83820_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 		desc_addr_set(desc + DESC_BUFPTR, buf);
 		desc[DESC_EXTSTS] = cpu_to_le32(extsts);
 
-		cmdsts = ((nr_frags|residue) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0);
+		cmdsts = ((nr_frags) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0);
 		cmdsts |= (desc == first_desc) ? 0 : CMDSTS_OWN;
 		cmdsts |= len;
 		desc[DESC_CMDSTS] = cpu_to_le32(cmdsts);
 
-		if (residue) {
-			buf += len;
-			len = residue;
-			continue;
-		}
-
 		if (!nr_frags)
 			break;
 
@@ -1841,7 +1830,8 @@ static int __devinit ns83820_init_one(struct pci_dev *pci_dev, const struct pci_
 	int using_dac = 0;
 
 	/* See if we can set the dma mask early on; failure is fatal. */
-	if (TRY_DAC && !pci_set_dma_mask(pci_dev, 0xffffffffffffffffULL)) {
+	if (sizeof(dma_addr_t) == 8 && 
+	 	!pci_set_dma_mask(pci_dev, 0xffffffffffffffffULL)) {
 		using_dac = 1;
 	} else if (!pci_set_dma_mask(pci_dev, 0xffffffff)) {
 		using_dac = 0;
@@ -1972,9 +1962,8 @@ static int __devinit ns83820_init_one(struct pci_dev *pci_dev, const struct pci_
 	/* When compiled with 64 bit addressing, we must always enable
 	 * the 64 bit descriptor format.
 	 */
-#ifdef USE_64BIT_ADDR
+	if (sizeof(dma_addr_t) == 8) 
 		dev->CFG_cache |= CFG_M64ADDR;
-#endif
 	if (using_dac)
 		dev->CFG_cache |= CFG_T64ADDR;