[netdrvr] ns83820: add ethtool media support

Split out from patch authored by Dan Faerch <dan@hacker.dk>.
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/ns83820.c

-#define VERSION "0.22"
+#define VERSION "0.23"
 /* ns83820.c by Benjamin LaHaise with contributions.
  *
  * Questions/comments/discussion to linux-ns83820@kvack.org.
@@ -1247,6 +1247,149 @@ static struct net_device_stats *ns83820_get_stats(struct net_device *ndev)
 	return &dev->stats;
 }
 
+/* Let ethtool retrieve info */
+static int ns83820_get_settings(struct net_device *ndev,
+				struct ethtool_cmd *cmd)
+{
+	struct ns83820 *dev = PRIV(ndev);
+	u32 cfg, tanar, tbicr;
+	int have_optical = 0;
+	int fullduplex   = 0;
+
+	/*
+	 * Here's the list of available ethtool commands from other drivers:
+	 *	cmd->advertising =
+	 *	cmd->speed =
+	 *	cmd->duplex =
+	 *	cmd->port = 0;
+	 *	cmd->phy_address =
+	 *	cmd->transceiver = 0;
+	 *	cmd->autoneg =
+	 *	cmd->maxtxpkt = 0;
+	 *	cmd->maxrxpkt = 0;
+	 */
+
+	/* read current configuration */
+	cfg   = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+	tanar = readl(dev->base + TANAR);
+	tbicr = readl(dev->base + TBICR);
+
+	if (dev->CFG_cache & CFG_TBI_EN) {
+		/* we have an optical interface */
+		have_optical = 1;
+		fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0;
+
+	} else {
+		/* We have copper */
+		fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0;
+        }
+
+	cmd->supported = SUPPORTED_Autoneg;
+
+	/* we have optical interface */
+	if (dev->CFG_cache & CFG_TBI_EN) {
+		cmd->supported |= SUPPORTED_1000baseT_Half |
+					SUPPORTED_1000baseT_Full |
+					SUPPORTED_FIBRE;
+		cmd->port       = PORT_FIBRE;
+	} /* TODO: else copper related  support */
+
+	cmd->duplex = fullduplex ? DUPLEX_FULL : DUPLEX_HALF;
+	switch (cfg / CFG_SPDSTS0 & 3) {
+	case 2:
+		cmd->speed = SPEED_1000;
+		break;
+	case 1:
+		cmd->speed = SPEED_100;
+		break;
+	default:
+		cmd->speed = SPEED_10;
+		break;
+	}
+	cmd->autoneg = (tbicr & TBICR_MR_AN_ENABLE) ? 1: 0;
+	return 0;
+}
+
+/* Let ethool change settings*/
+static int ns83820_set_settings(struct net_device *ndev,
+				struct ethtool_cmd *cmd)
+{
+	struct ns83820 *dev = PRIV(ndev);
+	u32 cfg, tanar;
+	int have_optical = 0;
+	int fullduplex   = 0;
+
+	/* read current configuration */
+	cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+	tanar = readl(dev->base + TANAR);
+
+	if (dev->CFG_cache & CFG_TBI_EN) {
+		/* we have optical */
+		have_optical = 1;
+		fullduplex   = (tanar & TANAR_FULL_DUP);
+
+	} else {
+		/* we have copper */
+		fullduplex = cfg & CFG_DUPSTS;
+	}
+
+	spin_lock_irq(&dev->misc_lock);
+	spin_lock(&dev->tx_lock);
+
+	/* Set duplex */
+	if (cmd->duplex != fullduplex) {
+		if (have_optical) {
+			/*set full duplex*/
+			if (cmd->duplex == DUPLEX_FULL) {
+				/* force full duplex */
+				writel(readl(dev->base + TXCFG)
+					| TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
+					dev->base + TXCFG);
+				writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
+					dev->base + RXCFG);
+				/* Light up full duplex LED */
+				writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT,
+					dev->base + GPIOR);
+			} else {
+				/*TODO: set half duplex */
+			}
+
+		} else {
+			/*we have copper*/
+			/* TODO: Set duplex for copper cards */
+		}
+		printk(KERN_INFO "%s: Duplex set via ethtool\n",
+		ndev->name);
+	}
+
+	/* Set autonegotiation */
+	if (1) {
+		if (cmd->autoneg == AUTONEG_ENABLE) {
+			/* restart auto negotiation */
+			writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
+				dev->base + TBICR);
+			writel(TBICR_MR_AN_ENABLE, dev->base + TBICR);
+				dev->linkstate = LINK_AUTONEGOTIATE;
+
+			printk(KERN_INFO "%s: autoneg enabled via ethtool\n",
+				ndev->name);
+		} else {
+			/* disable auto negotiation */
+			writel(0x00000000, dev->base + TBICR);
+		}
+
+		printk(KERN_INFO "%s: autoneg %s via ethtool\n", ndev->name,
+				cmd->autoneg ? "ENABLED" : "DISABLED");
+	}
+
+	phy_intr(ndev);
+	spin_unlock(&dev->tx_lock);
+	spin_unlock_irq(&dev->misc_lock);
+
+	return 0;
+}
+/* end ethtool get/set support -df */
+
 static void ns83820_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
 {
 	struct ns83820 *dev = PRIV(ndev);
@@ -1263,6 +1406,8 @@ static u32 ns83820_get_link(struct net_device *ndev)
 }
 
 static const struct ethtool_ops ops = {
+	.get_settings    = ns83820_get_settings,
+	.set_settings    = ns83820_set_settings,
 	.get_drvinfo     = ns83820_get_drvinfo,
 	.get_link        = ns83820_get_link
 };