drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

   1 /*******************************************************************************
   2   This contains the functions to handle the platform driver.
   3
   4   Copyright (C) 2007-2011  STMicroelectronics Ltd
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
  23 *******************************************************************************/
  24
  25 #include <linux/platform_device.h>
  26 #include <linux/io.h>
  27 #include "stmmac.h"
  28
  29 /**
  30  * stmmac_pltfr_probe
  31  * @pdev: platform device pointer
  32  * Description: platform_device probe function. It allocates
  33  * the necessary resources and invokes the main to init
  34  * the net device, register the mdio bus etc.
  35  */
  36 static int stmmac_pltfr_probe(struct platform_device *pdev)
  37 {
  38         int ret = 0;
  39         struct resource *res;
  40         void __iomem *addr = NULL;
  41         struct stmmac_priv *priv = NULL;
  42         struct plat_stmmacenet_data *plat_dat;
  43
  44         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  45         if (!res)
  46                 return -ENODEV;
  47
  48         if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
  49                 pr_err("%s: ERROR: memory allocation failed"
  50                        "cannot get the I/O addr 0x%x\n",
  51                        __func__, (unsigned int)res->start);
  52                 return -EBUSY;
  53         }
  54
  55         addr = ioremap(res->start, resource_size(res));
  56         if (!addr) {
  57                 pr_err("%s: ERROR: memory mapping failed", __func__);
  58                 ret = -ENOMEM;
  59                 goto out_release_region;
  60         }
  61         plat_dat = pdev->dev.platform_data;
  62
  63         /* Custom initialisation (if needed)*/
  64         if (plat_dat->init) {
  65                 ret = plat_dat->init(pdev);
  66                 if (unlikely(ret))
  67                         goto out_unmap;
  68         }
  69
  70         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
  71         if (!priv) {
  72                 pr_err("%s: main driver probe failed", __func__);
  73                 goto out_unmap;
  74         }
  75
  76         /* Get the MAC information */
  77         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
  78         if (priv->dev->irq == -ENXIO) {
  79                 pr_err("%s: ERROR: MAC IRQ configuration "
  80                        "information not found\n", __func__);
  81                 ret = -ENXIO;
  82                 goto out_unmap;
  83         }
  84
  85         /*
  86          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
  87          * The external wake up irq can be passed through the platform code
  88          * named as "eth_wake_irq"
  89          *
  90          * In case the wake up interrupt is not passed from the platform
  91          * so the driver will continue to use the mac irq (ndev->irq)
  92          */
  93         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
  94         if (priv->wol_irq == -ENXIO)
  95                 priv->wol_irq = priv->dev->irq;
  96
  97         platform_set_drvdata(pdev, priv->dev);
  98
  99         pr_debug("STMMAC platform driver registration completed");
 100
 101         return 0;
 102
 103 out_unmap:
 104         iounmap(addr);
 105         platform_set_drvdata(pdev, NULL);
 106
 107 out_release_region:
 108         release_mem_region(res->start, resource_size(res));
 109
 110         return ret;
 111 }
 112
 113 /**
 114  * stmmac_pltfr_remove
 115  * @pdev: platform device pointer
 116  * Description: this function calls the main to free the net resources
 117  * and calls the platforms hook and release the resources (e.g. mem).
 118  */
 119 static int stmmac_pltfr_remove(struct platform_device *pdev)
 120 {
 121         struct net_device *ndev = platform_get_drvdata(pdev);
 122         struct stmmac_priv *priv = netdev_priv(ndev);
 123         struct resource *res;
 124         int ret = stmmac_dvr_remove(ndev);
 125
 126         if (priv->plat->exit)
 127                 priv->plat->exit(pdev);
 128
 129         if (priv->plat->exit)
 130                 priv->plat->exit(pdev);
 131
 132         platform_set_drvdata(pdev, NULL);
 133
 134         iounmap((void *)priv->ioaddr);
 135         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 136         release_mem_region(res->start, resource_size(res));
 137
 138         return ret;
 139 }
 140
 141 #ifdef CONFIG_PM
 142 static int stmmac_pltfr_suspend(struct device *dev)
 143 {
 144         struct net_device *ndev = dev_get_drvdata(dev);
 145
 146         return stmmac_suspend(ndev);
 147 }
 148
 149 static int stmmac_pltfr_resume(struct device *dev)
 150 {
 151         struct net_device *ndev = dev_get_drvdata(dev);
 152
 153         return stmmac_resume(ndev);
 154 }
 155
 156 int stmmac_pltfr_freeze(struct device *dev)
 157 {
 158         struct net_device *ndev = dev_get_drvdata(dev);
 159
 160         return stmmac_freeze(ndev);
 161 }
 162
 163 int stmmac_pltfr_restore(struct device *dev)
 164 {
 165         struct net_device *ndev = dev_get_drvdata(dev);
 166
 167         return stmmac_restore(ndev);
 168 }
 169
 170 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
 171         .suspend = stmmac_pltfr_suspend,
 172         .resume = stmmac_pltfr_resume,
 173         .freeze = stmmac_pltfr_freeze,
 174         .thaw = stmmac_pltfr_restore,
 175         .restore = stmmac_pltfr_restore,
 176 };
 177 #else
 178 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
 179 #endif /* CONFIG_PM */
 180
 181 static struct platform_driver stmmac_driver = {
 182         .probe = stmmac_pltfr_probe,
 183         .remove = stmmac_pltfr_remove,
 184         .driver = {
 185                    .name = STMMAC_RESOURCE_NAME,
 186                    .owner = THIS_MODULE,
 187                    .pm = &stmmac_pltfr_pm_ops,
 188                    },
 189 };
 190
 191 module_platform_driver(stmmac_driver);
 192
 193 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
 194 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 195 MODULE_LICENSE("GPL");