[PATCH v3] net: sh_eth: Add support of device tree probe
Nobuhiro Iwamatsu
iwamatsu at nigauri.org
Fri Feb 15 10:47:54 EST 2013
From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at renesas.com>
This adds support of device tree probe for Renesas sh-ether driver.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at 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
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 at 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,
},
};
--
1.7.10.4
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