netdev - [PATCH v2] dmfe/tulip: Let dmfe handle DM910x except for SPARC on-board chips

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Date:	Tue, 05 Jan 2010 03:03:08 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	David Miller <davem@...emloft.net>
Cc:	brandon@...p.org, grundler@...gle.com, tobias@...gis.se,
	kyle@...artin.ca, netdev@...r.kernel.org, grundler@...isc-linux.org
Subject: [PATCH v2] dmfe/tulip: Let dmfe handle DM910x except for SPARC
 on-board chips

The Davicom DM9100 and DM9102 chips are used on the motherboards of
some SPARC systems (supported by the tulip driver) and also in PCI
expansion cards (supported by the dmfe driver).  There is no
difference in the PCI device ids for the two different configurations,
so these drivers both claim the device ids.  However, it is possible
to distinguish the two configurations by the presence of Open Firmware
properties for them, so we do that.

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
Changes from v1, as you requested:
- Downgraded log messages from ERR to INFO
- Removed dummy length parameter to of_get_property()

Ben.

 drivers/net/tulip/Kconfig      |    4 ++++
 drivers/net/tulip/dmfe.c       |   17 +++++++++++++++++
 drivers/net/tulip/tulip_core.c |   32 +++++++++++++++++++++++++-------
 3 files changed, 46 insertions(+), 7 deletions(-)

diff --git a/drivers/net/tulip/Kconfig b/drivers/net/tulip/Kconfig
index 1cc8cf4..516713f 100644
--- a/drivers/net/tulip/Kconfig
+++ b/drivers/net/tulip/Kconfig
@@ -101,6 +101,10 @@ config TULIP_NAPI_HW_MITIGATION
 
 	  If in doubt, say Y.
 
+config TULIP_DM910X
+	def_bool y
+	depends on TULIP && SPARC
+
 config DE4X5
 	tristate "Generic DECchip & DIGITAL EtherWORKS PCI/EISA"
 	depends on PCI || EISA
diff --git a/drivers/net/tulip/dmfe.c b/drivers/net/tulip/dmfe.c
index ad63621..b2273a1 100644
--- a/drivers/net/tulip/dmfe.c
+++ b/drivers/net/tulip/dmfe.c
@@ -377,6 +377,23 @@ static int __devinit dmfe_init_one (struct pci_dev *pdev,
 	if (!printed_version++)
 		printk(version);
 
+	/*
+	 *	SPARC on-board DM910x chips should be handled by the main
+	 *	tulip driver, except for early DM9100s.
+	 */
+#ifdef CONFIG_TULIP_DM910X
+	if (ent->driver_data == PCI_DM9100_ID && pdev->revision >= 0x30 ||
+	    ent->driver_data == PCI_DM9102_ID) {
+		struct device_node *dp = pci_device_to_OF_node(pdev);
+
+		if (dp && of_get_property(dp, "local-mac-address", NULL)) {
+			printk(KERN_INFO DRV_NAME
+			       ": skipping on-board DM910x (use tulip)\n");
+			return -ENODEV;
+		}
+	}
+#endif
+
 	/* Init network device */
 	dev = alloc_etherdev(sizeof(*db));
 	if (dev == NULL)
diff --git a/drivers/net/tulip/tulip_core.c b/drivers/net/tulip/tulip_core.c
index 0fa3140..595777d 100644
--- a/drivers/net/tulip/tulip_core.c
+++ b/drivers/net/tulip/tulip_core.c
@@ -196,9 +196,13 @@ struct tulip_chip_table tulip_tbl[] = {
 	| HAS_NWAY | HAS_PCI_MWI, tulip_timer, tulip_media_task },
 
   /* DM910X */
+#ifdef CONFIG_TULIP_DM910X
   { "Davicom DM9102/DM9102A", 128, 0x0001ebef,
 	HAS_MII | HAS_MEDIA_TABLE | CSR12_IN_SROM | HAS_ACPI,
 	tulip_timer, tulip_media_task },
+#else
+  { NULL },
+#endif
 
   /* RS7112 */
   { "Conexant LANfinity", 256, 0x0001ebef,
@@ -228,8 +232,10 @@ static struct pci_device_id tulip_pci_tbl[] = {
 	{ 0x1259, 0xa120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, COMET },
 	{ 0x11F6, 0x9881, PCI_ANY_ID, PCI_ANY_ID, 0, 0, COMPEX9881 },
 	{ 0x8086, 0x0039, PCI_ANY_ID, PCI_ANY_ID, 0, 0, I21145 },
+#ifdef CONFIG_TULIP_DM910X
 	{ 0x1282, 0x9100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DM910X },
 	{ 0x1282, 0x9102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DM910X },
+#endif
 	{ 0x1113, 0x1216, PCI_ANY_ID, PCI_ANY_ID, 0, 0, COMET },
 	{ 0x1113, 0x1217, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MX98715 },
 	{ 0x1113, 0x9511, PCI_ANY_ID, PCI_ANY_ID, 0, 0, COMET },
@@ -1299,18 +1305,30 @@ static int __devinit tulip_init_one (struct pci_dev *pdev,
 	}
 
 	/*
-	 *	Early DM9100's need software CRC and the DMFE driver
+	 *	DM910x chips should be handled by the dmfe driver, except
+	 *	on-board chips on SPARC systems.  Also, early DM9100s need
+	 *	software CRC which only the dmfe driver supports.
 	 */
 
-	if (pdev->vendor == 0x1282 && pdev->device == 0x9100)
-	{
-		/* Read Chip revision */
-		if (pdev->revision < 0x30)
-		{
-			printk(KERN_ERR PFX "skipping early DM9100 with Crc bug (use dmfe)\n");
+#ifdef CONFIG_TULIP_DM910X
+	if (chip_idx == DM910X) {
+		struct device_node *dp;
+
+		if (pdev->vendor == 0x1282 && pdev->device == 0x9100 &&
+		    pdev->revision < 0x30) {
+			printk(KERN_INFO PFX
+			       "skipping early DM9100 with Crc bug (use dmfe)\n");
+			return -ENODEV;
+		}
+
+		dp = pci_device_to_OF_node(pdev);
+		if (!(dp && of_get_property(dp, "local-mac-address", NULL))) {
+			printk(KERN_INFO PFX
+			       "skipping DM910x expansion card (use dmfe)\n");
 			return -ENODEV;
 		}
 	}
+#endif
 
 	/*
 	 *	Looks for early PCI chipsets where people report hangs
-- 
1.6.5.7


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