Patchwork [v3] net: sh_eth: Add support of device tree probe

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Submitter Nobuhiro Iwamatsu
Date Feb. 14, 2013, 11:47 p.m.
Message ID <1360885674-6780-1-git-send-email-iwamatsu@nigauri.org>
Download mbox | patch
Permalink /patch/220545/
State Superseded
Delegated to: David Miller
Headers show

Comments

Nobuhiro Iwamatsu - Feb. 14, 2013, 11:47 p.m.
From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

This adds support of device tree probe for Renesas sh-ether driver.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>

V3: - Remove empty sh_eth_parse_dt().
V3: - Removed sentnece of "needs-init" from document.
V2: - Removed ether_setup().
    - Fixed typo from "sh-etn" to "sh-eth".
	- Removed "needs-init" and sh-eth,endian from definition of DT.
	- Changed "sh-eth,edmac-endian" instead of "sh-eth,edmac-big-endain"
	  in definition of DT.
---
 Documentation/devicetree/bindings/net/sh_ether.txt |   39 +++++
 drivers/net/ethernet/renesas/sh_eth.c              |  150 ++++++++++++++++----
 2 files changed, 165 insertions(+), 24 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/sh_ether.txt

Patch

diff --git a/Documentation/devicetree/bindings/net/sh_ether.txt b/Documentation/devicetree/bindings/net/sh_ether.txt
new file mode 100644
index 0000000..f20d66a
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/sh_ether.txt
@@ -0,0 +1,39 @@ 
+* Renesas Electronics SuperH EMAC
+
+This file provides information, what the device node
+for the sh_eth interface contains.
+
+Required properties:
+- compatible:                   "renesas,sh-eth";
+- interrupt-parent:             The phandle for the interrupt controller that
+                                services interrupts for this device.
+- reg:                          Offset and length of the register set for the
+                                device.
+- interrupts:                   Interrupt mapping for the sh_eth interrupt
+                                sources (vector id).
+- phy-mode:                     String, operation mode of the PHY interface.
+- sh-eth,register-type:         String, register type of sh_eth.
+                                Please select "gigabit", "fast-sh4" or
+                                "fast-sh3-sh2".
+- sh-eth,phy-id:                PHY id.
+
+Optional properties:
+- local-mac-address:            6 bytes, mac address
+- sh-eth,no-ether-link:         Set link control by software. When device does
+                                not support ether-link, set.
+- sh-eth,ether-link-active-low: Set link check method.
+                                When detection of link is treated as active-low,
+                                set.
+- sh-eth,edmac-big-endian:      Set big endian for sh_eth dmac.
+                                It work as little endian when this is not set.
+
+Example (armadillo800eva):
+	sh-eth@e9a00000 {
+		compatible = "renesas,sh-eth";
+		interrupt-parent = <&intca>;
+		reg = <0xe9a00000 0x800>, <0xe9a01800 0x800>;
+		interrupts = <0x500>;
+		phy-mode = "mii";
+		sh-eth,register-type = "gigabit";
+		sh-eth,phy-id = <0>;
+	};
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 3d70586..b41249a 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -1,7 +1,7 @@ 
 /*
  *  SuperH Ethernet device driver
  *
- *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
+ *  Copyright (C) 2006-2013 Nobuhiro Iwamatsu
  *  Copyright (C) 2008-2012 Renesas Solutions Corp.
  *
  *  This program is free software; you can redistribute it and/or modify it
@@ -31,6 +31,12 @@ 
 #include <linux/platform_device.h>
 #include <linux/mdio-bitbang.h>
 #include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_net.h>
 #include <linux/phy.h>
 #include <linux/cache.h>
 #include <linux/io.h>
@@ -2347,26 +2353,103 @@  static const struct net_device_ops sh_eth_netdev_ops = {
 	.ndo_change_mtu		= eth_change_mtu,
 };
 
+#ifdef CONFIG_OF
+
+static int
+sh_eth_of_get_register_type(struct device_node *np)
+{
+	const char *of_str;
+	int ret = of_property_read_string(np, "sh-eth,register-type", &of_str);
+	if (ret)
+		return ret;
+
+	if (of_str && !strcmp(of_str, "gigabit"))
+		return SH_ETH_REG_GIGABIT;
+
+	else if (of_str && !strcmp(of_str, "fast-sh4"))
+		return SH_ETH_REG_FAST_SH4;
+	else if (of_str && !strcmp(of_str, "fast-sh3-sh2"))
+		return SH_ETH_REG_FAST_SH3_SH2;
+	else
+		return -EINVAL;
+}
+
+static struct sh_eth_plat_data *
+sh_eth_parse_dt(struct device *dev, struct net_device *ndev)
+{
+	int ret;
+	struct device_node *np = dev->of_node;
+	struct sh_eth_plat_data *pdata;
+
+	pdata = devm_kzalloc(dev, sizeof(struct sh_eth_plat_data),
+					GFP_KERNEL);
+	if (!pdata) {
+		dev_err(dev, "%s: failed to allocate config data\n", __func__);
+		return NULL;
+	}
+
+	pdata->phy_interface = of_get_phy_mode(np);
+
+	of_property_read_u32(np, "sh-eth,phy-id", &pdata->phy);
+
+	if (of_find_property(np, "sh-eth,edmac-big-endian", NULL))
+		pdata->edmac_endian = EDMAC_BIG_ENDIAN;
+	else
+		pdata->edmac_endian = EDMAC_LITTLE_ENDIAN;
+
+	if (of_find_property(np, "sh-eth,no-ether-link", NULL))
+		pdata->no_ether_link = 1;
+	else
+		pdata->no_ether_link = 0;
+
+	if (of_find_property(np, "sh-eth,ether-link-active-low", NULL))
+		pdata->ether_link_active_low = 1;
+	else
+		pdata->ether_link_active_low = 0;
+
+	ret = sh_eth_of_get_register_type(np);
+	if (ret < 0)
+		goto error;
+	pdata->register_type = ret;
+
+#ifdef CONFIG_OF_NET
+	if (!is_valid_ether_addr(ndev->dev_addr)) {
+		const char *macaddr = of_get_mac_address(np);
+		if (macaddr)
+			memcpy(pdata->mac_addr, macaddr, ETH_ALEN);
+	}
+#endif
+
+	return pdata;
+
+error:
+	devm_kfree(dev, pdata);
+	return NULL;
+}
+#endif
+
 static int sh_eth_drv_probe(struct platform_device *pdev)
 {
-	int ret, devno = 0;
+	int ret = 0, devno = 0;
 	struct resource *res;
 	struct net_device *ndev = NULL;
 	struct sh_eth_private *mdp = NULL;
 	struct sh_eth_plat_data *pd;
+	struct device_node *np = pdev->dev.of_node;
+
+	ndev = alloc_etherdev(sizeof(struct sh_eth_private));
+	if (!ndev) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
+	mdp = netdev_priv(ndev);
 	/* get base addr */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (unlikely(res == NULL)) {
 		dev_err(&pdev->dev, "invalid resource\n");
 		ret = -EINVAL;
-		goto out;
-	}
-
-	ndev = alloc_etherdev(sizeof(struct sh_eth_private));
-	if (!ndev) {
-		ret = -ENOMEM;
-		goto out;
+		goto out_release;
 	}
 
 	/* The sh Ether-specific entries in the device structure. */
@@ -2383,27 +2466,41 @@  static int sh_eth_drv_probe(struct platform_device *pdev)
 	}
 	ndev->irq = ret;
 
-	SET_NETDEV_DEV(ndev, &pdev->dev);
-
-	/* Fill in the fields of the device structure with ethernet values. */
-	ether_setup(ndev);
-
-	mdp = netdev_priv(ndev);
-	mdp->num_tx_ring = TX_RING_SIZE;
-	mdp->num_rx_ring = RX_RING_SIZE;
 	mdp->addr = ioremap(res->start, resource_size(res));
 	if (mdp->addr == NULL) {
 		ret = -ENOMEM;
 		dev_err(&pdev->dev, "ioremap failed.\n");
 		goto out_release;
 	}
+#ifdef CONFIG_OF
+	if (np && of_device_is_available(np)) {
+		pd = sh_eth_parse_dt(&pdev->dev, ndev);
+		if (pdev->dev.platform_data) {
+			struct sh_eth_plat_data *tmp =
+				pdev->dev.platform_data;
+			pd->set_mdio_gate = tmp->set_mdio_gate;
+			pd->needs_init = tmp->needs_init;
+		}
+	} else
+#endif
+		pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data);
+
+	if (!pd) {
+		dev_err(&pdev->dev, "no setup data defined\n");
+		ret = -EINVAL;
+		goto out_release;
+	}
+
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+
+	mdp->num_tx_ring = TX_RING_SIZE;
+	mdp->num_rx_ring = RX_RING_SIZE;
 
 	spin_lock_init(&mdp->lock);
 	mdp->pdev = pdev;
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_resume(&pdev->dev);
 
-	pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data);
 	/* get PHY ID */
 	mdp->phy_id = pd->phy;
 	mdp->phy_interface = pd->phy_interface;
@@ -2412,6 +2509,8 @@  static int sh_eth_drv_probe(struct platform_device *pdev)
 	mdp->no_ether_link = pd->no_ether_link;
 	mdp->ether_link_active_low = pd->ether_link_active_low;
 	mdp->reg_offset = sh_eth_get_register_offset(pd->register_type);
+	/* read and set MAC address */
+	read_mac_address(ndev, pd->mac_addr);
 
 	/* set cpu data */
 #if defined(SH_ETH_HAS_BOTH_MODULES)
@@ -2429,20 +2528,16 @@  static int sh_eth_drv_probe(struct platform_device *pdev)
 	/* debug message level */
 	mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
 
-	/* read and set MAC address */
-	read_mac_address(ndev, pd->mac_addr);
-
 	/* ioremap the TSU registers */
 	if (mdp->cd->tsu) {
 		struct resource *rtsu;
 		rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 		if (!rtsu) {
 			dev_err(&pdev->dev, "Not found TSU resource\n");
-			ret = -ENODEV;
 			goto out_release;
 		}
 		mdp->tsu_addr = ioremap(rtsu->start,
-					resource_size(rtsu));
+				resource_size(rtsu));
 		mdp->port = devno % 2;
 		ndev->features = NETIF_F_HW_VLAN_FILTER;
 	}
@@ -2522,17 +2617,24 @@  static int sh_eth_runtime_nop(struct device *dev)
 	return 0;
 }
 
-static struct dev_pm_ops sh_eth_dev_pm_ops = {
+static const struct dev_pm_ops sh_eth_dev_pm_ops = {
 	.runtime_suspend = sh_eth_runtime_nop,
 	.runtime_resume = sh_eth_runtime_nop,
 };
 
+static struct of_device_id sh_eth_match[] = {
+	{ .compatible = "renesas,sh-eth",},
+	{},
+};
+MODULE_DEVICE_TABLE(of, sh_eth_match);
+
 static struct platform_driver sh_eth_driver = {
 	.probe = sh_eth_drv_probe,
 	.remove = sh_eth_drv_remove,
 	.driver = {
 		   .name = CARDNAME,
 		   .pm = &sh_eth_dev_pm_ops,
+		   .of_match_table = sh_eth_match,
 	},
 };