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Date: Mon, 28 Jan 2013 10:21:55 +0900
From: Simon Horman <horms@...ge.net.au>
To: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
Cc: netdev@...r.kernel.org, linux-sh@...r.kernel.org
Subject: Re: [PATCH 1/2] net: sh_eth: Add support of device tree probe
[Cc: linux-sh]
On Tue, Oct 16, 2012 at 10:17:58AM +0900, Nobuhiro Iwamatsu wrote:
> This adds support of device tree probe for Renesas sh-ether driver.
>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
Hi Iwamatsu-san,
could you let me know what the status of this patch is?
> ---
> Documentation/devicetree/bindings/net/sh_ether.txt | 45 ++++
> drivers/net/ethernet/renesas/sh_eth.c | 267 ++++++++++++++++----
> 2 files changed, 268 insertions(+), 44 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..2cec715
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/sh_ether.txt
> @@ -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@...00000 {
> + 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>;
> + };
> diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
> index c8bfea0..756d87e 100644
> --- a/drivers/net/ethernet/renesas/sh_eth.c
> +++ b/drivers/net/ethernet/renesas/sh_eth.c
> @@ -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,
> },
> };
>
> --
> 1.7.10.4
>
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