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Date: Wed, 27 Feb 2013 10:05:55 +0900
From: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@...esas.com>
To: Simon Horman <horms@...ge.net.au>
Cc: Nobuhiro Iwamatsu <iwamatsu@...auri.org>, netdev@...r.kernel.org,
horms+renesas@...ge.net.au, magnus.damm@...il.com,
devicetree-discuss@...ts.ozlabs.org, kda@...ux-powerpc.org,
kuninori.morimoto.gx@...esas.com
Subject: Re: [PATCH v4] net: sh_eth: Add support of device tree probe
Hi, Simon.
Thanks for the supporting. I understood.
Best regards,
Nobuhiro
(2013/02/16 11:26), Simon Horman wrote:
> On Fri, Feb 15, 2013 at 10:53:25AM +0900, Nobuhiro Iwamatsu wrote:
>> From: Nobuhiro Iwamatsu<nobuhiro.iwamatsu.yj@...esas.com>
>>
>> This adds support of device tree probe for Renesas sh-ether driver.
>
> Hi Iwamatsu-san,
>
> I do not expect this code to go through the renesas tree. However, in
> order to provide a basis for work on renesas SoCs I have added this patch
> to the topic/sh_eth topic branch in the reneas tree on kernel.org and
> merged it into topic/all+next.
>
> In other words, I am not picking this patch up to merge it or add it to
> linux-next, rather I am storing it for reference.
>
> Also, I do note that there have already been some comments made on this
> patch and I plan to date topic/sh_eth topic branch as new versions are
> posted.
>
>> Signed-off-by: Nobuhiro Iwamatsu<nobuhiro.iwamatsu.yj@...esas.com>
>>
>> V4: - 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@...00000 {
>> + 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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