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 <linux/of.h>
  28 #include <linux/of_net.h>
  29 #include "stmmac.h"
  30
  31 #ifdef CONFIG_OF
  32 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
  33                                             struct plat_stmmacenet_data *plat,
  34                                             const char **mac)
  35 {
  36         struct device_node *np = pdev->dev.of_node;
  37
  38         if (!np)
  39                 return -ENODEV;
  40
  41         *mac = of_get_mac_address(np);
  42         plat->interface = of_get_phy_mode(np);
  43         plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
  44                                            sizeof(struct stmmac_mdio_bus_data),
  45                                            GFP_KERNEL);
  46
  47         /*
  48          * Currently only the properties needed on SPEAr600
  49          * are provided. All other properties should be added
  50          * once needed on other platforms.
  51          */
  52         if (of_device_is_compatible(np, "st,spear600-gmac") ||
  53                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
  54                 of_device_is_compatible(np, "snps,dwmac")) {
  55                 plat->has_gmac = 1;
  56                 plat->pmt = 1;
  57         }
  58
  59         return 0;
  60 }
  61 #else
  62 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
  63                                             struct plat_stmmacenet_data *plat,
  64                                             const char **mac)
  65 {
  66         return -ENOSYS;
  67 }
  68 #endif /* CONFIG_OF */
  69
  70 /**
  71  * stmmac_pltfr_probe
  72  * @pdev: platform device pointer
  73  * Description: platform_device probe function. It allocates
  74  * the necessary resources and invokes the main to init
  75  * the net device, register the mdio bus etc.
  76  */
  77 static int __devinit stmmac_pltfr_probe(struct platform_device *pdev)
  78 {
  79         int ret = 0;
  80         struct resource *res;
  81         void __iomem *addr = NULL;
  82         struct stmmac_priv *priv = NULL;
  83         struct plat_stmmacenet_data *plat_dat = NULL;
  84         const char *mac = NULL;
  85
  86         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  87         if (!res)
  88                 return -ENODEV;
  89
  90         if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
  91                 pr_err("%s: ERROR: memory allocation failed"
  92                        "cannot get the I/O addr 0x%x\n",
  93                        __func__, (unsigned int)res->start);
  94                 return -EBUSY;
  95         }
  96
  97         addr = ioremap(res->start, resource_size(res));
  98         if (!addr) {
  99                 pr_err("%s: ERROR: memory mapping failed", __func__);
 100                 ret = -ENOMEM;
 101                 goto out_release_region;
 102         }
 103
 104         if (pdev->dev.of_node) {
 105                 plat_dat = devm_kzalloc(&pdev->dev,
 106                                         sizeof(struct plat_stmmacenet_data),
 107                                         GFP_KERNEL);
 108                 if (!plat_dat) {
 109                         pr_err("%s: ERROR: no memory", __func__);
 110                         ret = -ENOMEM;
 111                         goto out_unmap;
 112                 }
 113
 114                 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
 115                 if (ret) {
 116                         pr_err("%s: main dt probe failed", __func__);
 117                         goto out_unmap;
 118                 }
 119         } else {
 120                 plat_dat = pdev->dev.platform_data;
 121         }
 122
 123         /* Custom initialisation (if needed)*/
 124         if (plat_dat->init) {
 125                 ret = plat_dat->init(pdev);
 126                 if (unlikely(ret))
 127                         goto out_unmap;
 128         }
 129
 130         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
 131         if (!priv) {
 132                 pr_err("%s: main driver probe failed", __func__);
 133                 goto out_unmap;
 134         }
 135
 136         /* Get MAC address if available (DT) */
 137         if (mac)
 138                 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
 139
 140         /* Get the MAC information */
 141         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
 142         if (priv->dev->irq == -ENXIO) {
 143                 pr_err("%s: ERROR: MAC IRQ configuration "
 144                        "information not found\n", __func__);
 145                 ret = -ENXIO;
 146                 goto out_unmap;
 147         }
 148
 149         /*
 150          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 151          * The external wake up irq can be passed through the platform code
 152          * named as "eth_wake_irq"
 153          *
 154          * In case the wake up interrupt is not passed from the platform
 155          * so the driver will continue to use the mac irq (ndev->irq)
 156          */
 157         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
 158         if (priv->wol_irq == -ENXIO)
 159                 priv->wol_irq = priv->dev->irq;
 160
 161         priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
 162
 163         platform_set_drvdata(pdev, priv->dev);
 164
 165         pr_debug("STMMAC platform driver registration completed");
 166
 167         return 0;
 168
 169 out_unmap:
 170         iounmap(addr);
 171         platform_set_drvdata(pdev, NULL);
 172
 173 out_release_region:
 174         release_mem_region(res->start, resource_size(res));
 175
 176         return ret;
 177 }
 178
 179 /**
 180  * stmmac_pltfr_remove
 181  * @pdev: platform device pointer
 182  * Description: this function calls the main to free the net resources
 183  * and calls the platforms hook and release the resources (e.g. mem).
 184  */
 185 static int stmmac_pltfr_remove(struct platform_device *pdev)
 186 {
 187         struct net_device *ndev = platform_get_drvdata(pdev);
 188         struct stmmac_priv *priv = netdev_priv(ndev);
 189         struct resource *res;
 190         int ret = stmmac_dvr_remove(ndev);
 191
 192         if (priv->plat->exit)
 193                 priv->plat->exit(pdev);
 194
 195         platform_set_drvdata(pdev, NULL);
 196
 197         iounmap((void __force __iomem *)priv->ioaddr);
 198         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 199         release_mem_region(res->start, resource_size(res));
 200
 201         return ret;
 202 }
 203
 204 #ifdef CONFIG_PM
 205 static int stmmac_pltfr_suspend(struct device *dev)
 206 {
 207         struct net_device *ndev = dev_get_drvdata(dev);
 208
 209         return stmmac_suspend(ndev);
 210 }
 211
 212 static int stmmac_pltfr_resume(struct device *dev)
 213 {
 214         struct net_device *ndev = dev_get_drvdata(dev);
 215
 216         return stmmac_resume(ndev);
 217 }
 218
 219 int stmmac_pltfr_freeze(struct device *dev)
 220 {
 221         int ret;
 222         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 223         struct net_device *ndev = dev_get_drvdata(dev);
 224         struct platform_device *pdev = to_platform_device(dev);
 225
 226         ret = stmmac_freeze(ndev);
 227         if (plat_dat->exit)
 228                 plat_dat->exit(pdev);
 229
 230         return ret;
 231 }
 232
 233 int stmmac_pltfr_restore(struct device *dev)
 234 {
 235         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 236         struct net_device *ndev = dev_get_drvdata(dev);
 237         struct platform_device *pdev = to_platform_device(dev);
 238
 239         if (plat_dat->init)
 240                 plat_dat->init(pdev);
 241
 242         return stmmac_restore(ndev);
 243 }
 244
 245 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
 246         .suspend = stmmac_pltfr_suspend,
 247         .resume = stmmac_pltfr_resume,
 248         .freeze = stmmac_pltfr_freeze,
 249         .thaw = stmmac_pltfr_restore,
 250         .restore = stmmac_pltfr_restore,
 251 };
 252 #else
 253 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
 254 #endif /* CONFIG_PM */
 255
 256 static const struct of_device_id stmmac_dt_ids[] = {
 257         { .compatible = "st,spear600-gmac"},
 258         { .compatible = "snps,dwmac-3.70a"},
 259         { .compatible = "snps,dwmac"},
 260         { /* sentinel */ }
 261 };
 262 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
 263
 264 struct platform_driver stmmac_pltfr_driver = {
 265         .probe = stmmac_pltfr_probe,
 266         .remove = stmmac_pltfr_remove,
 267         .driver = {
 268                    .name = STMMAC_RESOURCE_NAME,
 269                    .owner = THIS_MODULE,
 270                    .pm = &stmmac_pltfr_pm_ops,
 271                    .of_match_table = of_match_ptr(stmmac_dt_ids),
 272                    },
 273 };
 274
 275 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
 276 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 277 MODULE_LICENSE("GPL");