diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c new file mode 100644 index 00000000..1d3780f5 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -0,0 +1,252 @@ +/******************************************************************************* + This contains the functions to handle the platform driver. + + Copyright (C) 2007-2011 STMicroelectronics Ltd + + This program is free software; you can redistribute it and/or modify it + under the terms and conditions of the GNU General Public License, + version 2, as published by the Free Software Foundation. + + This program is distributed in the hope it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + + The full GNU General Public License is included in this distribution in + the file called "COPYING". + + Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> +*******************************************************************************/ + +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_net.h> +#include "stmmac.h" + +#ifdef CONFIG_OF +static int stmmac_probe_config_dt(struct platform_device *pdev, + struct plat_stmmacenet_data *plat, + const char **mac) +{ + struct device_node *np = pdev->dev.of_node; + + if (!np) + return -ENODEV; + + *mac = of_get_mac_address(np); + plat->interface = of_get_phy_mode(np); + plat->mdio_bus_data = devm_kzalloc(&pdev->dev, + sizeof(struct stmmac_mdio_bus_data), + GFP_KERNEL); + + /* + * Currently only the properties needed on SPEAr600 + * are provided. All other properties should be added + * once needed on other platforms. + */ + if (of_device_is_compatible(np, "st,spear600-gmac") || + of_device_is_compatible(np, "snps,dwmac-3.70a") || + of_device_is_compatible(np, "snps,dwmac")) { + plat->has_gmac = 1; + plat->pmt = 1; + } + + return 0; +} +#else +static int stmmac_probe_config_dt(struct platform_device *pdev, + struct plat_stmmacenet_data *plat, + const char **mac) +{ + return -ENOSYS; +} +#endif /* CONFIG_OF */ + +/** + * stmmac_pltfr_probe + * @pdev: platform device pointer + * Description: platform_device probe function. It allocates + * the necessary resources and invokes the main to init + * the net device, register the mdio bus etc. + */ +static int stmmac_pltfr_probe(struct platform_device *pdev) +{ + int ret = 0; + struct resource *res; + struct device *dev = &pdev->dev; + void __iomem *addr = NULL; + struct stmmac_priv *priv = NULL; + struct plat_stmmacenet_data *plat_dat = NULL; + const char *mac = NULL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + addr = devm_ioremap_resource(dev, res); + if (IS_ERR(addr)) + return PTR_ERR(addr); + + if (pdev->dev.of_node) { + plat_dat = devm_kzalloc(&pdev->dev, + sizeof(struct plat_stmmacenet_data), + GFP_KERNEL); + if (!plat_dat) { + pr_err("%s: ERROR: no memory", __func__); + return -ENOMEM; + } + + ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); + if (ret) { + pr_err("%s: main dt probe failed", __func__); + return ret; + } + } else { + plat_dat = pdev->dev.platform_data; + } + + /* Custom initialisation (if needed)*/ + if (plat_dat->init) { + ret = plat_dat->init(pdev); + if (unlikely(ret)) + return ret; + } + + priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); + if (!priv) { + pr_err("%s: main driver probe failed", __func__); + return -ENODEV; + } + + /* Get MAC address if available (DT) */ + if (mac) + memcpy(priv->dev->dev_addr, mac, ETH_ALEN); + + /* Get the MAC information */ + priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); + if (priv->dev->irq == -ENXIO) { + pr_err("%s: ERROR: MAC IRQ configuration " + "information not found\n", __func__); + return -ENXIO; + } + + /* + * On some platforms e.g. SPEAr the wake up irq differs from the mac irq + * The external wake up irq can be passed through the platform code + * named as "eth_wake_irq" + * + * In case the wake up interrupt is not passed from the platform + * so the driver will continue to use the mac irq (ndev->irq) + */ + priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); + if (priv->wol_irq == -ENXIO) + priv->wol_irq = priv->dev->irq; + + priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); + + platform_set_drvdata(pdev, priv->dev); + + pr_debug("STMMAC platform driver registration completed"); + + return 0; +} + +/** + * stmmac_pltfr_remove + * @pdev: platform device pointer + * Description: this function calls the main to free the net resources + * and calls the platforms hook and release the resources (e.g. mem). + */ +static int stmmac_pltfr_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct stmmac_priv *priv = netdev_priv(ndev); + int ret = stmmac_dvr_remove(ndev); + + if (priv->plat->exit) + priv->plat->exit(pdev); + + platform_set_drvdata(pdev, NULL); + + return ret; +} + +#ifdef CONFIG_PM +static int stmmac_pltfr_suspend(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + + return stmmac_suspend(ndev); +} + +static int stmmac_pltfr_resume(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + + return stmmac_resume(ndev); +} + +int stmmac_pltfr_freeze(struct device *dev) +{ + int ret; + struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); + struct net_device *ndev = dev_get_drvdata(dev); + struct platform_device *pdev = to_platform_device(dev); + + ret = stmmac_freeze(ndev); + if (plat_dat->exit) + plat_dat->exit(pdev); + + return ret; +} + +int stmmac_pltfr_restore(struct device *dev) +{ + struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); + struct net_device *ndev = dev_get_drvdata(dev); + struct platform_device *pdev = to_platform_device(dev); + + if (plat_dat->init) + plat_dat->init(pdev); + + return stmmac_restore(ndev); +} + +static const struct dev_pm_ops stmmac_pltfr_pm_ops = { + .suspend = stmmac_pltfr_suspend, + .resume = stmmac_pltfr_resume, + .freeze = stmmac_pltfr_freeze, + .thaw = stmmac_pltfr_restore, + .restore = stmmac_pltfr_restore, +}; +#else +static const struct dev_pm_ops stmmac_pltfr_pm_ops; +#endif /* CONFIG_PM */ + +static const struct of_device_id stmmac_dt_ids[] = { + { .compatible = "st,spear600-gmac"}, + { .compatible = "snps,dwmac-3.70a"}, + { .compatible = "snps,dwmac"}, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, stmmac_dt_ids); + +struct platform_driver stmmac_pltfr_driver = { + .probe = stmmac_pltfr_probe, + .remove = stmmac_pltfr_remove, + .driver = { + .name = STMMAC_RESOURCE_NAME, + .owner = THIS_MODULE, + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = of_match_ptr(stmmac_dt_ids), + }, +}; + +MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); +MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); +MODULE_LICENSE("GPL"); |