Date:	Wed, 30 Apr 2014 22:21:09 +0400
From:	Alexey Charkov <alchark@...il.com>
To:	Roger Luethi <rl@...lgate.ch>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	David Laight <David.Laight@...LAB.COM>,
	Jan Moskyto Matejka <mq@...e.cz>,
	David Miller <davem@...emloft.net>
Cc:	Alexey Charkov <alchark@...il.com>
Subject: [PATCH] net: via-rhine: Drop revision property, use quirks instead

This adds two new flags to quirks and thus removes the need to carry
revision in rhine_private. As a result, the init logic is simplified
a bit.

This also fixes a compiler warning in OF code on 64bit due to pointer
casting:

        drivers/net/ethernet/via/via-rhine.c: In function ‘rhine_init_one_platform’:
        drivers/net/ethernet/via/via-rhine.c:1132:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
          revision = (u32)match->data;
                     ^

That code was added in commit 2d283862dc62daead9db0dc89cd0d0351e91f765
("net: via-rhine: add OF bus binding").

Tested in platform configuration on a VIA WM8950 APC Rock board.

Reported-by: Jan Moskyto Matejka <mq@...e.cz>
Signed-off-by: Alexey Charkov <alchark@...il.com>
---

This supercedes a previously submitted patch titled:

net: via-rhine: Fix compiler warning re: pointer casting on 64bit

I thought it would be a good idea to also streamline the common code somewhat
while at it, and storing quirks directly in the match table sounded more
appropriate than storing an abstract revision that doesn't come from the
hardware.

This also further reduces the rhine_private structure and makes runtime checks
more uniform throughout the driver.

 drivers/net/ethernet/via/via-rhine.c | 77 ++++++++++++++++++++----------------
 1 file changed, 42 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c
index 4fa9201..13cfcce 100644
--- a/drivers/net/ethernet/via/via-rhine.c
+++ b/drivers/net/ethernet/via/via-rhine.c
@@ -264,6 +264,8 @@ enum rhine_quirks {
 	rq6patterns	= 0x0040,	/* 6 instead of 4 patterns for WOL */
 	rqStatusWBRace	= 0x0080,	/* Tx Status Writeback Error possible */
 	rqRhineI	= 0x0100,	/* See comment below */
+	rqIntPHY	= 0x0200,	/* Integrated PHY */
+	rqMgmt		= 0x0400,	/* Management adapter */
 };
 /*
  * rqRhineI: VT86C100A (aka Rhine-I) uses different bits to enable
@@ -284,11 +286,11 @@ static DEFINE_PCI_DEVICE_TABLE(rhine_pci_tbl) = {
 MODULE_DEVICE_TABLE(pci, rhine_pci_tbl);
 
 /* OpenFirmware identifiers for platform-bus devices
- * The .data field is currently only used to store chip revision
- * (for quirks etc.)
+ * The .data field is currently only used to store quirks
  */
+static u32 vt8500_quirks = rqWOL | rqForceReset | rq6patterns;
 static struct of_device_id rhine_of_tbl[] = {
-	{ .compatible = "via,vt8500-rhine", .data = (void *)0x84 },
+	{ .compatible = "via,vt8500-rhine", .data = &vt8500_quirks },
 	{ }	/* terminate list */
 };
 MODULE_DEVICE_TABLE(of, rhine_of_tbl);
@@ -459,7 +461,6 @@ struct rhine_private {
 	unsigned char *tx_bufs;
 	dma_addr_t tx_bufs_dma;
 
-	int revision;
 	int irq;
 	long pioaddr;
 	struct net_device *dev;
@@ -882,7 +883,7 @@ static const struct net_device_ops rhine_netdev_ops = {
 #endif
 };
 
-static int rhine_init_one_common(struct device *hwdev, int revision,
+static int rhine_init_one_common(struct device *hwdev, u32 quirks,
 				 long pioaddr, void __iomem *ioaddr, int irq)
 {
 	struct net_device *dev;
@@ -906,31 +907,13 @@ static int rhine_init_one_common(struct device *hwdev, int revision,
 
 	rp = netdev_priv(dev);
 	rp->dev = dev;
-	rp->revision = revision;
+	rp->quirks = quirks;
 	rp->pioaddr = pioaddr;
 	rp->base = ioaddr;
 	rp->irq = irq;
 	rp->msg_enable = netif_msg_init(debug, RHINE_MSG_DEFAULT);
 
-	phy_id = 0;
-	name = "Rhine";
-	if (revision < VTunknown0) {
-		rp->quirks = rqRhineI;
-	} else if (revision >= VT6102) {
-		rp->quirks = rqWOL | rqForceReset;
-		if (revision < VT6105) {
-			name = "Rhine II";
-			rp->quirks |= rqStatusWBRace;	/* Rhine-II exclusive */
-		} else {
-			phy_id = 1;	/* Integrated PHY, phy_id fixed to 1 */
-			if (revision >= VT6105_B0)
-				rp->quirks |= rq6patterns;
-			if (revision < VT6105M)
-				name = "Rhine III";
-			else
-				name = "Rhine III (Management Adapter)";
-		}
-	}
+	phy_id = rp->quirks & rqIntPHY ? 1 : 0;
 
 	u64_stats_init(&rp->tx_stats.syncp);
 	u64_stats_init(&rp->rx_stats.syncp);
@@ -975,7 +958,7 @@ static int rhine_init_one_common(struct device *hwdev, int revision,
 	if (rp->quirks & rqRhineI)
 		dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
 
-	if (rp->revision >= VT6105M)
+	if (rp->quirks & rqMgmt)
 		dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
 				 NETIF_F_HW_VLAN_CTAG_RX |
 				 NETIF_F_HW_VLAN_CTAG_FILTER;
@@ -985,6 +968,15 @@ static int rhine_init_one_common(struct device *hwdev, int revision,
 	if (rc)
 		goto err_out_free_netdev;
 
+	if (rp->quirks & rqRhineI)
+		name = "Rhine";
+	else if (rp->quirks & rqStatusWBRace)
+		name = "Rhine II";
+	else if (rp->quirks & rqMgmt)
+		name = "Rhine III (Management Adapter)";
+	else
+		name = "Rhine III";
+
 	netdev_info(dev, "VIA %s at 0x%lx, %pM, IRQ %d\n",
 		    name, (long)ioaddr, dev->dev_addr, rp->irq);
 
@@ -1031,7 +1023,7 @@ static int rhine_init_one_pci(struct pci_dev *pdev,
 	long pioaddr, memaddr;
 	void __iomem *ioaddr;
 	int io_size = pdev->revision < VTunknown0 ? 128 : 256;
-	u32 quirks = pdev->revision < VTunknown0 ? rqRhineI : 0;
+	u32 quirks;
 #ifdef USE_MMIO
 	int bar = 1;
 #else
@@ -1047,6 +1039,21 @@ static int rhine_init_one_pci(struct pci_dev *pdev,
 	if (rc)
 		goto err_out;
 
+	if (pdev->revision < VTunknown0) {
+		quirks = rqRhineI;
+	} else if (pdev->revision >= VT6102) {
+		quirks = rqWOL | rqForceReset;
+		if (pdev->revision < VT6105) {
+			quirks |= rqStatusWBRace;
+		} else {
+			quirks |= rqIntPHY;
+			if (pdev->revision >= VT6105_B0)
+				quirks |= rq6patterns;
+			if (pdev->revision >= VT6105M)
+				quirks |= rqMgmt;
+		}
+	}
+
 	/* sanity check */
 	if ((pci_resource_len(pdev, 0) < io_size) ||
 	    (pci_resource_len(pdev, 1) < io_size)) {
@@ -1093,7 +1100,7 @@ static int rhine_init_one_pci(struct pci_dev *pdev,
 	}
 #endif /* USE_MMIO */
 
-	rc = rhine_init_one_common(&pdev->dev, pdev->revision,
+	rc = rhine_init_one_common(&pdev->dev, quirks,
 				   pioaddr, ioaddr, pdev->irq);
 	if (!rc)
 		return 0;
@@ -1111,7 +1118,7 @@ err_out:
 static int rhine_init_one_platform(struct platform_device *pdev)
 {
 	const struct of_device_id *match;
-	u32 revision;
+	const u32 *quirks;
 	int irq;
 	struct resource *res;
 	void __iomem *ioaddr;
@@ -1129,11 +1136,11 @@ static int rhine_init_one_platform(struct platform_device *pdev)
 	if (!irq)
 		return -EINVAL;
 
-	revision = (u32)match->data;
-	if (!revision)
+	quirks = match->data;
+	if (!quirks)
 		return -EINVAL;
 
-	return rhine_init_one_common(&pdev->dev, revision,
+	return rhine_init_one_common(&pdev->dev, *quirks,
 				     (long)ioaddr, ioaddr, irq);
 }
 
@@ -1523,7 +1530,7 @@ static void init_registers(struct net_device *dev)
 
 	rhine_set_rx_mode(dev);
 
-	if (rp->revision >= VT6105M)
+	if (rp->quirks & rqMgmt)
 		rhine_init_cam_filter(dev);
 
 	napi_enable(&rp->napi);
@@ -2160,7 +2167,7 @@ static void rhine_set_rx_mode(struct net_device *dev)
 		/* Too many to match, or accept all multicasts. */
 		iowrite32(0xffffffff, ioaddr + MulticastFilter0);
 		iowrite32(0xffffffff, ioaddr + MulticastFilter1);
-	} else if (rp->revision >= VT6105M) {
+	} else if (rp->quirks & rqMgmt) {
 		int i = 0;
 		u32 mCAMmask = 0;	/* 32 mCAMs (6105M and better) */
 		netdev_for_each_mc_addr(ha, dev) {
@@ -2182,7 +2189,7 @@ static void rhine_set_rx_mode(struct net_device *dev)
 		iowrite32(mc_filter[1], ioaddr + MulticastFilter1);
 	}
 	/* enable/disable VLAN receive filtering */
-	if (rp->revision >= VT6105M) {
+	if (rp->quirks & rqMgmt) {
 		if (dev->flags & IFF_PROMISC)
 			BYTE_REG_BITS_OFF(BCR1_VIDFR, ioaddr + PCIBusConfig1);
 		else
-- 
1.9.1

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