266 lines
6.9 KiB
C
266 lines
6.9 KiB
C
/*******************************************************************************
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This contains the functions to handle the platform driver.
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Copyright (C) 2007-2011 STMicroelectronics Ltd
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include "stmmac.h"
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#ifdef CONFIG_OF
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static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
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struct plat_stmmacenet_data *plat,
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const char **mac)
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{
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struct device_node *np = pdev->dev.of_node;
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if (!np)
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return -ENODEV;
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*mac = of_get_mac_address(np);
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plat->interface = of_get_phy_mode(np);
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plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
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sizeof(struct stmmac_mdio_bus_data),
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GFP_KERNEL);
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/*
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* Currently only the properties needed on SPEAr600
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* are provided. All other properties should be added
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* once needed on other platforms.
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*/
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if (of_device_is_compatible(np, "st,spear600-gmac")) {
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plat->pbl = 8;
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plat->has_gmac = 1;
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plat->pmt = 1;
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}
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return 0;
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}
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#else
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static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
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struct plat_stmmacenet_data *plat,
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const char **mac)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_OF */
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/**
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* stmmac_pltfr_probe
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* @pdev: platform device pointer
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* Description: platform_device probe function. It allocates
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* the necessary resources and invokes the main to init
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* the net device, register the mdio bus etc.
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*/
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static int stmmac_pltfr_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct resource *res;
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void __iomem *addr = NULL;
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struct stmmac_priv *priv = NULL;
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struct plat_stmmacenet_data *plat_dat = NULL;
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const char *mac = NULL;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENODEV;
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if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
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pr_err("%s: ERROR: memory allocation failed"
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"cannot get the I/O addr 0x%x\n",
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__func__, (unsigned int)res->start);
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return -EBUSY;
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}
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addr = ioremap(res->start, resource_size(res));
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if (!addr) {
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pr_err("%s: ERROR: memory mapping failed", __func__);
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ret = -ENOMEM;
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goto out_release_region;
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}
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if (pdev->dev.of_node) {
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plat_dat = devm_kzalloc(&pdev->dev,
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sizeof(struct plat_stmmacenet_data),
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GFP_KERNEL);
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if (!plat_dat) {
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pr_err("%s: ERROR: no memory", __func__);
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ret = -ENOMEM;
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goto out_unmap;
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}
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ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
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if (ret) {
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pr_err("%s: main dt probe failed", __func__);
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goto out_unmap;
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}
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} else {
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plat_dat = pdev->dev.platform_data;
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}
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/* Custom initialisation (if needed)*/
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if (plat_dat->init) {
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ret = plat_dat->init(pdev);
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if (unlikely(ret))
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goto out_unmap;
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}
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priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
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if (!priv) {
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pr_err("%s: main driver probe failed", __func__);
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goto out_unmap;
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}
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/* Get MAC address if available (DT) */
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if (mac)
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memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
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/* Get the MAC information */
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priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
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if (priv->dev->irq == -ENXIO) {
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pr_err("%s: ERROR: MAC IRQ configuration "
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"information not found\n", __func__);
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ret = -ENXIO;
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goto out_unmap;
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}
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/*
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* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
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* The external wake up irq can be passed through the platform code
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* named as "eth_wake_irq"
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*
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* In case the wake up interrupt is not passed from the platform
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* so the driver will continue to use the mac irq (ndev->irq)
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*/
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priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
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if (priv->wol_irq == -ENXIO)
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priv->wol_irq = priv->dev->irq;
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platform_set_drvdata(pdev, priv->dev);
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pr_debug("STMMAC platform driver registration completed");
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return 0;
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out_unmap:
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iounmap(addr);
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platform_set_drvdata(pdev, NULL);
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out_release_region:
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release_mem_region(res->start, resource_size(res));
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return ret;
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}
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/**
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* stmmac_pltfr_remove
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* @pdev: platform device pointer
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* Description: this function calls the main to free the net resources
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* and calls the platforms hook and release the resources (e.g. mem).
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*/
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static int stmmac_pltfr_remove(struct platform_device *pdev)
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{
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struct net_device *ndev = platform_get_drvdata(pdev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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struct resource *res;
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int ret = stmmac_dvr_remove(ndev);
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if (priv->plat->exit)
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priv->plat->exit(pdev);
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if (priv->plat->exit)
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priv->plat->exit(pdev);
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platform_set_drvdata(pdev, NULL);
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iounmap((void *)priv->ioaddr);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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release_mem_region(res->start, resource_size(res));
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return ret;
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}
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#ifdef CONFIG_PM
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static int stmmac_pltfr_suspend(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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return stmmac_suspend(ndev);
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}
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static int stmmac_pltfr_resume(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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return stmmac_resume(ndev);
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}
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int stmmac_pltfr_freeze(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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return stmmac_freeze(ndev);
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}
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int stmmac_pltfr_restore(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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return stmmac_restore(ndev);
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}
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static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
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.suspend = stmmac_pltfr_suspend,
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.resume = stmmac_pltfr_resume,
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.freeze = stmmac_pltfr_freeze,
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.thaw = stmmac_pltfr_restore,
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.restore = stmmac_pltfr_restore,
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};
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#else
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static const struct dev_pm_ops stmmac_pltfr_pm_ops;
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#endif /* CONFIG_PM */
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static const struct of_device_id stmmac_dt_ids[] = {
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{ .compatible = "st,spear600-gmac", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
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static struct platform_driver stmmac_driver = {
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.probe = stmmac_pltfr_probe,
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.remove = stmmac_pltfr_remove,
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.driver = {
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.name = STMMAC_RESOURCE_NAME,
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.owner = THIS_MODULE,
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = of_match_ptr(stmmac_dt_ids),
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},
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};
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module_platform_driver(stmmac_driver);
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MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
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MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
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MODULE_LICENSE("GPL");
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