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 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         struct stmmac_dma_cfg *dma_cfg;
  38
  39         if (!np)
  40                 return -ENODEV;
  41
  42         *mac = of_get_mac_address(np);
  43         plat->interface = of_get_phy_mode(np);
  44
  45         plat->bus_id = of_alias_get_id(np, "ethernet");
  46         if (plat->bus_id < 0)
  47                 plat->bus_id = 0;
  48
  49         of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr);
  50
  51         plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
  52                                            sizeof(struct stmmac_mdio_bus_data),
  53                                            GFP_KERNEL);
  54
  55         /*
  56          * Currently only the properties needed on SPEAr600
  57          * are provided. All other properties should be added
  58          * once needed on other platforms.
  59          */
  60         if (of_device_is_compatible(np, "st,spear600-gmac") ||
  61                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
  62                 of_device_is_compatible(np, "snps,dwmac")) {
  63                 plat->has_gmac = 1;
  64                 plat->pmt = 1;
  65         }
  66
  67         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
  68                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
  69                 plat->enh_desc = 1;
  70                 plat->bugged_jumbo = 1;
  71                 plat->force_sf_dma_mode = 1;
  72         }
  73
  74         if (of_find_property(np, "snps,pbl", NULL)) {
  75                 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
  76                                        GFP_KERNEL);
  77                 if (!dma_cfg)
  78                         return -ENOMEM;
  79                 plat->dma_cfg = dma_cfg;
  80                 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
  81                 dma_cfg->fixed_burst =
  82                         of_property_read_bool(np, "snps,fixed-burst");
  83                 dma_cfg->mixed_burst =
  84                         of_property_read_bool(np, "snps,mixed-burst");
  85         }
  86         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
  87         if (plat->force_thresh_dma_mode) {
  88                 plat->force_sf_dma_mode = 0;
  89                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
  90         }
  91
  92         return 0;
  93 }
  94 #else
  95 static int stmmac_probe_config_dt(struct platform_device *pdev,
  96                                   struct plat_stmmacenet_data *plat,
  97                                   const char **mac)
  98 {
  99         return -ENOSYS;
 100 }
 101 #endif /* CONFIG_OF */
 102
 103 /**
 104  * stmmac_pltfr_probe
 105  * @pdev: platform device pointer
 106  * Description: platform_device probe function. It allocates
 107  * the necessary resources and invokes the main to init
 108  * the net device, register the mdio bus etc.
 109  */
 110 static int stmmac_pltfr_probe(struct platform_device *pdev)
 111 {
 112         int ret = 0;
 113         struct resource *res;
 114         struct device *dev = &pdev->dev;
 115         void __iomem *addr = NULL;
 116         struct stmmac_priv *priv = NULL;
 117         struct plat_stmmacenet_data *plat_dat = NULL;
 118         const char *mac = NULL;
 119
 120         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 121         addr = devm_ioremap_resource(dev, res);
 122         if (IS_ERR(addr))
 123                 return PTR_ERR(addr);
 124
 125         plat_dat = dev_get_platdata(&pdev->dev);
 126         if (pdev->dev.of_node) {
 127                 if (!plat_dat)
 128                         plat_dat = devm_kzalloc(&pdev->dev,
 129                                         sizeof(struct plat_stmmacenet_data),
 130                                         GFP_KERNEL);
 131                 if (!plat_dat) {
 132                         pr_err("%s: ERROR: no memory", __func__);
 133                         return  -ENOMEM;
 134                 }
 135
 136                 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
 137                 if (ret) {
 138                         pr_err("%s: main dt probe failed", __func__);
 139                         return ret;
 140                 }
 141         }
 142
 143         /* Custom initialisation (if needed)*/
 144         if (plat_dat->init) {
 145                 ret = plat_dat->init(pdev);
 146                 if (unlikely(ret))
 147                         return ret;
 148         }
 149
 150         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
 151         if (!priv) {
 152                 pr_err("%s: main driver probe failed", __func__);
 153                 return -ENODEV;
 154         }
 155
 156         /* Get MAC address if available (DT) */
 157         if (mac)
 158                 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
 159
 160         /* Get the MAC information */
 161         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
 162         if (priv->dev->irq == -ENXIO) {
 163                 pr_err("%s: ERROR: MAC IRQ configuration "
 164                        "information not found\n", __func__);
 165                 return -ENXIO;
 166         }
 167
 168         /*
 169          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 170          * The external wake up irq can be passed through the platform code
 171          * named as "eth_wake_irq"
 172          *
 173          * In case the wake up interrupt is not passed from the platform
 174          * so the driver will continue to use the mac irq (ndev->irq)
 175          */
 176         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
 177         if (priv->wol_irq == -ENXIO)
 178                 priv->wol_irq = priv->dev->irq;
 179
 180         priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
 181
 182         platform_set_drvdata(pdev, priv->dev);
 183
 184         pr_debug("STMMAC platform driver registration completed");
 185
 186         return 0;
 187 }
 188
 189 /**
 190  * stmmac_pltfr_remove
 191  * @pdev: platform device pointer
 192  * Description: this function calls the main to free the net resources
 193  * and calls the platforms hook and release the resources (e.g. mem).
 194  */
 195 static int stmmac_pltfr_remove(struct platform_device *pdev)
 196 {
 197         struct net_device *ndev = platform_get_drvdata(pdev);
 198         struct stmmac_priv *priv = netdev_priv(ndev);
 199         int ret = stmmac_dvr_remove(ndev);
 200
 201         if (priv->plat->exit)
 202                 priv->plat->exit(pdev);
 203
 204         return ret;
 205 }
 206
 207 #ifdef CONFIG_PM
 208 static int stmmac_pltfr_suspend(struct device *dev)
 209 {
 210         struct net_device *ndev = dev_get_drvdata(dev);
 211
 212         return stmmac_suspend(ndev);
 213 }
 214
 215 static int stmmac_pltfr_resume(struct device *dev)
 216 {
 217         struct net_device *ndev = dev_get_drvdata(dev);
 218
 219         return stmmac_resume(ndev);
 220 }
 221
 222 int stmmac_pltfr_freeze(struct device *dev)
 223 {
 224         int ret;
 225         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 226         struct net_device *ndev = dev_get_drvdata(dev);
 227         struct platform_device *pdev = to_platform_device(dev);
 228
 229         ret = stmmac_freeze(ndev);
 230         if (plat_dat->exit)
 231                 plat_dat->exit(pdev);
 232
 233         return ret;
 234 }
 235
 236 int stmmac_pltfr_restore(struct device *dev)
 237 {
 238         struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
 239         struct net_device *ndev = dev_get_drvdata(dev);
 240         struct platform_device *pdev = to_platform_device(dev);
 241
 242         if (plat_dat->init)
 243                 plat_dat->init(pdev);
 244
 245         return stmmac_restore(ndev);
 246 }
 247
 248 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
 249         .suspend = stmmac_pltfr_suspend,
 250         .resume = stmmac_pltfr_resume,
 251         .freeze = stmmac_pltfr_freeze,
 252         .thaw = stmmac_pltfr_restore,
 253         .restore = stmmac_pltfr_restore,
 254 };
 255 #else
 256 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
 257 #endif /* CONFIG_PM */
 258
 259 static const struct of_device_id stmmac_dt_ids[] = {
 260         { .compatible = "st,spear600-gmac"},
 261         { .compatible = "snps,dwmac-3.610"},
 262         { .compatible = "snps,dwmac-3.70a"},
 263         { .compatible = "snps,dwmac-3.710"},
 264         { .compatible = "snps,dwmac"},
 265         { /* sentinel */ }
 266 };
 267 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
 268
 269 struct platform_driver stmmac_pltfr_driver = {
 270         .probe = stmmac_pltfr_probe,
 271         .remove = stmmac_pltfr_remove,
 272         .driver = {
 273                    .name = STMMAC_RESOURCE_NAME,
 274                    .owner = THIS_MODULE,
 275                    .pm = &stmmac_pltfr_pm_ops,
 276                    .of_match_table = of_match_ptr(stmmac_dt_ids),
 277                    },
 278 };
 279
 280 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
 281 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 282 MODULE_LICENSE("GPL");