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                 plat->dma_cfg->pbl = 8;
  54                 plat->has_gmac = 1;
  55                 plat->pmt = 1;
  56         }
  57
  58         return 0;
  59 }
  60 #else
  61 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
  62                                             struct plat_stmmacenet_data *plat,
  63                                             const char **mac)
  64 {
  65         return -ENOSYS;
  66 }
  67 #endif /* CONFIG_OF */
  68
  69 /**
  70  * stmmac_pltfr_probe
  71  * @pdev: platform device pointer
  72  * Description: platform_device probe function. It allocates
  73  * the necessary resources and invokes the main to init
  74  * the net device, register the mdio bus etc.
  75  */
  76 static int stmmac_pltfr_probe(struct platform_device *pdev)
  77 {
  78         int ret = 0;
  79         struct resource *res;
  80         void __iomem *addr = NULL;
  81         struct stmmac_priv *priv = NULL;
  82         struct plat_stmmacenet_data *plat_dat = NULL;
  83         const char *mac = NULL;
  84
  85         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  86         if (!res)
  87                 return -ENODEV;
  88
  89         if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
  90                 pr_err("%s: ERROR: memory allocation failed"
  91                        "cannot get the I/O addr 0x%x\n",
  92                        __func__, (unsigned int)res->start);
  93                 return -EBUSY;
  94         }
  95
  96         addr = ioremap(res->start, resource_size(res));
  97         if (!addr) {
  98                 pr_err("%s: ERROR: memory mapping failed", __func__);
  99                 ret = -ENOMEM;
 100                 goto out_release_region;
 101         }
 102
 103         if (pdev->dev.of_node) {
 104                 plat_dat = devm_kzalloc(&pdev->dev,
 105                                         sizeof(struct plat_stmmacenet_data),
 106                                         GFP_KERNEL);
 107                 if (!plat_dat) {
 108                         pr_err("%s: ERROR: no memory", __func__);
 109                         ret = -ENOMEM;
 110                         goto out_unmap;
 111                 }
 112
 113                 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
 114                 if (ret) {
 115                         pr_err("%s: main dt probe failed", __func__);
 116                         goto out_unmap;
 117                 }
 118         } else {
 119                 plat_dat = pdev->dev.platform_data;
 120         }
 121
 122         /* Custom initialisation (if needed)*/
 123         if (plat_dat->init) {
 124                 ret = plat_dat->init(pdev);
 125                 if (unlikely(ret))
 126                         goto out_unmap;
 127         }
 128
 129         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
 130         if (!priv) {
 131                 pr_err("%s: main driver probe failed", __func__);
 132                 goto out_unmap;
 133         }
 134
 135         /* Get MAC address if available (DT) */
 136         if (mac)
 137                 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
 138
 139         /* Get the MAC information */
 140         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
 141         if (priv->dev->irq == -ENXIO) {
 142                 pr_err("%s: ERROR: MAC IRQ configuration "
 143                        "information not found\n", __func__);
 144                 ret = -ENXIO;
 145                 goto out_unmap;
 146         }
 147
 148         /*
 149          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 150          * The external wake up irq can be passed through the platform code
 151          * named as "eth_wake_irq"
 152          *
 153          * In case the wake up interrupt is not passed from the platform
 154          * so the driver will continue to use the mac irq (ndev->irq)
 155          */
 156         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
 157         if (priv->wol_irq == -ENXIO)
 158                 priv->wol_irq = priv->dev->irq;
 159
 160         platform_set_drvdata(pdev, priv->dev);
 161
 162         pr_debug("STMMAC platform driver registration completed");
 163
 164         return 0;
 165
 166 out_unmap:
 167         iounmap(addr);
 168         platform_set_drvdata(pdev, NULL);
 169
 170 out_release_region:
 171         release_mem_region(res->start, resource_size(res));
 172
 173         return ret;
 174 }
 175
 176 /**
 177  * stmmac_pltfr_remove
 178  * @pdev: platform device pointer
 179  * Description: this function calls the main to free the net resources
 180  * and calls the platforms hook and release the resources (e.g. mem).
 181  */
 182 static int stmmac_pltfr_remove(struct platform_device *pdev)
 183 {
 184         struct net_device *ndev = platform_get_drvdata(pdev);
 185         struct stmmac_priv *priv = netdev_priv(ndev);
 186         struct resource *res;
 187         int ret = stmmac_dvr_remove(ndev);
 188
 189         if (priv->plat->exit)
 190                 priv->plat->exit(pdev);
 191
 192         platform_set_drvdata(pdev, NULL);
 193
 194         iounmap((void *)priv->ioaddr);
 195         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 196         release_mem_region(res->start, resource_size(res));
 197
 198         return ret;
 199 }
 200
 201 #ifdef CONFIG_PM
 202 static int stmmac_pltfr_suspend(struct device *dev)
 203 {
 204         struct net_device *ndev = dev_get_drvdata(dev);
 205
 206         return stmmac_suspend(ndev);
 207 }
 208
 209 static int stmmac_pltfr_resume(struct device *dev)
 210 {
 211         struct net_device *ndev = dev_get_drvdata(dev);
 212
 213         return stmmac_resume(ndev);
 214 }
 215
 216 int stmmac_pltfr_freeze(struct device *dev)
 217 {
 218         int ret;
 219         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 220         struct net_device *ndev = dev_get_drvdata(dev);
 221         struct platform_device *pdev = to_platform_device(dev);
 222
 223         ret = stmmac_freeze(ndev);
 224         if (plat_dat->exit)
 225                 plat_dat->exit(pdev);
 226
 227         return ret;
 228 }
 229
 230 int stmmac_pltfr_restore(struct device *dev)
 231 {
 232         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 233         struct net_device *ndev = dev_get_drvdata(dev);
 234         struct platform_device *pdev = to_platform_device(dev);
 235
 236         if (plat_dat->init)
 237                 plat_dat->init(pdev);
 238
 239         return stmmac_restore(ndev);
 240 }
 241
 242 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
 243         .suspend = stmmac_pltfr_suspend,
 244         .resume = stmmac_pltfr_resume,
 245         .freeze = stmmac_pltfr_freeze,
 246         .thaw = stmmac_pltfr_restore,
 247         .restore = stmmac_pltfr_restore,
 248 };
 249 #else
 250 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
 251 #endif /* CONFIG_PM */
 252
 253 static const struct of_device_id stmmac_dt_ids[] = {
 254         { .compatible = "st,spear600-gmac", },
 255         { /* sentinel */ }
 256 };
 257 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
 258
 259 static struct platform_driver stmmac_driver = {
 260         .probe = stmmac_pltfr_probe,
 261         .remove = stmmac_pltfr_remove,
 262         .driver = {
 263                    .name = STMMAC_RESOURCE_NAME,
 264                    .owner = THIS_MODULE,
 265                    .pm = &stmmac_pltfr_pm_ops,
 266                    .of_match_table = of_match_ptr(stmmac_dt_ids),
 267                    },
 268 };
 269
 270 module_platform_driver(stmmac_driver);
 271
 272 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
 273 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 274 MODULE_LICENSE("GPL");