[PATCH 1/2] net: sh_eth: Add support of device tree probe

@@ -0,0 +1,45 @@
+* 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).
+- cell-index:                   Ether device index starts at 0.
+- phy-mode:              String, operation mode of the PHY interface.
+- sh-eth,edmac-endian:          String, endian of sh_eth dmac.
+- sh-eth,register-type:         String, register type of sh_eth.
+                                Please select "gigabit", "fast-sh4" or
+                                "fast-sh3-sh2".
+                                Please select "little" or "big".
+- sh-eth,endian:                String, endian of sh_eth dmac.
+- 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-etn,ether-link-active-low: set link check method.
+                                When detection of link is treated as active-low,
+                                set.
+- sh-etn,needs-init:            Initialization flag.
+                                When initialize device in probing device, set.
+
+Example (armadillo800eva):
+	sh-eth@e9a00000 {
+		compatible = "renesas,sh-eth";
+		interrupt-parent = <&intca>;
+		reg = <0xe9a00000 0x800>, <0xe9a01800 0x800>;
+		interrupts = <0x500>;
+		cell-index = <0>;
+		phy-mode = "mii";
+		sh-eth,edmac-endian = "little";
+		sh-eth,register-type = "gigabit";
+		sh-eth,phy-id = <0>;
+	};

@@ -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>

@@ -2347,21 +2353,161 @@ 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 *devno)
+{
+	int ret;
+	struct sh_eth_private *mdp = NULL;
+	struct resource res;
+	const char *of_str;
+	struct device_node *np = dev->of_node;
+	struct sh_eth_plat_data *pdata;
+
+	mdp = netdev_priv(ndev);
+
+	ret = of_address_to_resource(np, 0, &res);
+	if (ret) {
+		dev_err(dev, "could not determine device base address\n");
+		return NULL;
+	}
+
+	ndev->base_addr = res.start;
+
+	ndev->irq = irq_of_parse_and_map(np, 0);
+	if (ndev->irq == NO_IRQ) {
+		dev_err(dev, "irq_of_parse_and_map failed\n");
+		return NULL;
+	}
+
+	mdp->addr = ioremap(res.start, resource_size(&res));
+	if (mdp->addr == NULL) {
+		dev_err(dev, "ioremap failed.\n");
+		return NULL;
+	}
+
+	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__);
+		goto out_release;
+	}
+
+	ret = of_property_read_u32(np, "cell-index", devno);
+
+	pdata->phy_interface = of_get_phy_mode(np);
+
+	of_property_read_u32(np, "sh-eth,phy-id", &pdata->phy);
+
+	of_property_read_string(np, "sh-eth,edmac-endian", &of_str);
+	if (of_str && !strcmp(of_str, "little"))
+		pdata->edmac_endian = EDMAC_LITTLE_ENDIAN;
+	else if (of_str && !strcmp(of_str, "big"))
+		pdata->edmac_endian = EDMAC_BIG_ENDIAN;
+	else
+		goto out_release;
+
+	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 out_release;
+	pdata->register_type = ret;
+
+	if (of_find_property(np, "sh-eth,needs-init", NULL))
+		pdata->needs_init = 1;
+	else
+		pdata->needs_init = 0;
+
+#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;
+
+out_release:
+	iounmap(mdp->addr);
+	return NULL;
+}
+
+static int
+sh_eth_parse_dt_tmu(struct device *dev, struct net_device *ndev, int *devno)
+{
+	int ret;
+	struct sh_eth_private *mdp = NULL;
+	struct resource res;
+
+	mdp = netdev_priv(ndev);
+
+	ret = of_address_to_resource(dev->of_node, 1, &res);
+	if (ret) {
+		dev_err(dev, "could not determine device base address\n");
+		return -EINVAL;
+	}
+
+	mdp->tsu_addr = ioremap(res.start, resource_size(&res));
+	if (mdp->addr == NULL) {
+		dev_err(dev, "ioremap failed.\n");
+		return -ENOMEM;
+	}
+
+	mdp->port = (*devno) % 2;
+	ndev->features = NETIF_F_HW_VLAN_FILTER;
+
+	return 0;
+}
+#else
+static struct sh_eth_plat_data *
+sh_eth_parse_dt(struct device *dev, struct net_device *ndev, int *devno)
+{
+	return NULL;
+}
+static int
+sh_eth_parse_dt_tmu(struct device *dev, struct net_device *ndev)
+{
+	return -ENOSYS;
+}
+#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;
-
-	/* 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;
-	}
+	struct device_node *np = pdev->dev.of_node;
 
 	ndev = alloc_etherdev(sizeof(struct sh_eth_private));
 	if (!ndev) {

@@ -2369,41 +2515,63 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
 		goto out;
 	}
 
-	/* The sh Ether-specific entries in the device structure. */
-	ndev->base_addr = res->start;
-	devno = pdev->id;
-	if (devno < 0)
-		devno = 0;
+	/* Fill in the fields of the device structure with ethernet values. */
+	ether_setup(ndev);
 
-	ndev->dma = -1;
-	ret = platform_get_irq(pdev, 0);
-	if (ret < 0) {
-		ret = -ENODEV;
-		goto out_release;
+	mdp = netdev_priv(ndev);
+
+	if (np && of_device_is_available(np)) {
+		pd = sh_eth_parse_dt(&pdev->dev, ndev, &devno);
+		if (!pd) {
+			dev_err(&pdev->dev, "no setup data defined\n");
+			ret = -EINVAL;
+			goto out_release;
+		}
+	} else {
+		/* 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_release;
+		}
+
+		/* The sh Ether-specific entries in the device structure. */
+		ndev->base_addr = res->start;
+		devno = pdev->id;
+		if (devno < 0)
+			devno = 0;
+
+		ndev->dma = -1;
+		ret = platform_get_irq(pdev, 0);
+		if (ret < 0) {
+			ret = -ENODEV;
+			goto out_release;
+		}
+		ndev->irq = ret;
+
+		mdp->addr = ioremap(res->start, resource_size(res));
+		if (mdp->addr == NULL) {
+			ret = -ENOMEM;
+			dev_err(&pdev->dev, "ioremap failed.\n");
+			goto out_release;
+		}
+
+		pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data);
 	}
-	ndev->irq = ret;
 
-	SET_NETDEV_DEV(ndev, &pdev->dev);
+	ndev->dma = -1;
 
-	/* Fill in the fields of the device structure with ethernet values. */
-	ether_setup(ndev);
+	SET_NETDEV_DEV(ndev, &pdev->dev);
 
-	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;
-	}
 
 	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 +2580,8 @@ 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)

@@ -2429,22 +2599,24 @@ 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,
+		if (np) {
+			ret = sh_eth_parse_dt_tmu(&pdev->dev, ndev, &devno);
+			if (ret)
+				goto out_release;
+		} else {
+			struct resource *rtsu;
+			rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+			if (!rtsu) {
+				dev_err(&pdev->dev, "Not found TSU resource\n");
+				goto out_release;
+			}
+			mdp->tsu_addr = ioremap(rtsu->start,
 					resource_size(rtsu));
-		mdp->port = devno % 2;
-		ndev->features = NETIF_F_HW_VLAN_FILTER;
+			mdp->port = devno % 2;
+			ndev->features = NETIF_F_HW_VLAN_FILTER;
+		}
 	}
 
 	/* initialize first or needed device */

@@ -2527,12 +2699,19 @@ static struct dev_pm_ops sh_eth_dev_pm_ops = {
 	.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,
 	},
 };