[PATCH v5] net: sh_eth: Add support of device tree probe
Simon Horman
horms at verge.net.au
Tue Mar 19 15:22:29 EST 2013
On Tue, Mar 05, 2013 at 09:43:39AM +0900, Simon Horman wrote:
> [ Cc: Mark Rutland ]
>
> On Tue, Mar 05, 2013 at 06:52:20AM +0900, Nobuhiro Iwamatsu wrote:
> > This adds support of device tree probe for Renesas sh-ether driver.
> >
> > Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj at renesas.com>
>
> Hi Iwamatsu-san,
>
> could you please address the review by
> Mark Rutland of the bindings in this patch.
> The review was made for v2 but I believe it
> is still applicable to v5.
>
> http://www.spinics.net/lists/netdev/msg226454.html
Ping.
>
> > V5: - Rewrite sh_eth_parse_dt().
> > Remove of_device_is_available() and CONFIG_OF from support OF
> > checking function and re-add empty sh_eth_parse_dt().
> > - Add CONFIG_PM to definition of dev_pm_ops.
> > - Add CONFIG_OF to definition of of_device_id.
> > V4: - Remove empty sh_eth_parse_dt().
> > 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 | 164 +++++++++++++++++---
> > 2 files changed, 178 insertions(+), 25 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..2deb841
> > --- /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..a97d208 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 +2353,109 @@ 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,
> > + struct device_node *np)
> > +{
> > + int ret;
> > + 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;
> > +}
> > +#else
> > +static inline struct sh_eth_plat_data *
> > +sh_eth_parse_dt(struct device *dev, struct net_device *ndev,
> > + struct device_node *np)
> > +{
> > + 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. */
> > @@ -2383,14 +2472,6 @@ 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;
> > @@ -2398,12 +2479,33 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
> > goto out_release;
> > }
> >
> > + if (np) {
> > + pd = sh_eth_parse_dt(&pdev->dev, ndev, np);
> > + if (pdev->dev.platform_data && pd) {
> > + 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
> > + pd = 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 +2514,8 @@ 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 +2533,16 @@ 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;
> > }
> > @@ -2509,6 +2609,7 @@ static int sh_eth_drv_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +#ifdef CONFIG_PM
> > static int sh_eth_runtime_nop(struct device *dev)
> > {
> > /*
> > @@ -2522,17 +2623,30 @@ 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,
> > };
> > +#define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)
> > +#else
> > +#define SH_ETH_PM_OPS NULL
> > +#endif
> > +
> > +#ifdef CONFIG_OF
> > +static const struct of_device_id sh_eth_match[] = {
> > + { .compatible = "renesas,sh-eth", },
> > + {},
> > +};
> > +MODULE_DEVICE_TABLE(of, sh_eth_match);
> > +#endif
> >
> > 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,
> > + .pm = SH_ETH_PM_OPS,
> > + .of_match_table = of_match_ptr(sh_eth_match),
> > },
> > };
> >
> > --
> > 1.7.10.4
> >
> --
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