LXR linux/drivers/net/ethernet/arc/emac

   1/**
   2 * emac_arc.c - ARC EMAC specific glue layer
   3 *
   4 * Copyright (C) 2014 Romain Perier
   5 *
   6 * Romain Perier  <romain.perier@gmail.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 */
  18
  19#include <linux/etherdevice.h>
  20#include <linux/module.h>
  21#include <linux/of_net.h>
  22#include <linux/platform_device.h>
  23
  24#include "emac.h"
  25
  26#define DRV_NAME    "emac_arc"
  27#define DRV_VERSION "1.0"
  28
  29static int emac_arc_probe(struct platform_device *pdev)
  30{
  31        struct device *dev = &pdev->dev;
  32        struct net_device *ndev;
  33        struct arc_emac_priv *priv;
  34        int interface, err;
  35
  36        if (!dev->of_node)
  37                return -ENODEV;
  38
  39        ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
  40        if (!ndev)
  41                return -ENOMEM;
  42        platform_set_drvdata(pdev, ndev);
  43        SET_NETDEV_DEV(ndev, dev);
  44
  45        priv = netdev_priv(ndev);
  46        priv->drv_name = DRV_NAME;
  47        priv->drv_version = DRV_VERSION;
  48
  49        interface = of_get_phy_mode(dev->of_node);
  50        if (interface < 0)
  51                interface = PHY_INTERFACE_MODE_MII;
  52
  53        priv->clk = devm_clk_get(dev, "hclk");
  54        if (IS_ERR(priv->clk)) {
  55                dev_err(dev, "failed to retrieve host clock from device tree\n");
  56                err = -EINVAL;
  57                goto out_netdev;
  58        }
  59
  60        err = arc_emac_probe(ndev, interface);
  61out_netdev:
  62        if (err)
  63                free_netdev(ndev);
  64        return err;
  65}
  66
  67static int emac_arc_remove(struct platform_device *pdev)
  68{
  69        struct net_device *ndev = platform_get_drvdata(pdev);
  70        int err;
  71
  72        err = arc_emac_remove(ndev);
  73        free_netdev(ndev);
  74        return err;
  75}
  76
  77static const struct of_device_id emac_arc_dt_ids[] = {
  78        { .compatible = "snps,arc-emac" },
  79        { /* Sentinel */ }
  80};
  81MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
  82
  83static struct platform_driver emac_arc_driver = {
  84        .probe = emac_arc_probe,
  85        .remove = emac_arc_remove,
  86        .driver = {
  87                .name = DRV_NAME,
  88                .of_match_table  = emac_arc_dt_ids,
  89        },
  90};
  91
  92module_platform_driver(emac_arc_driver);
  93
  94MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
  95MODULE_DESCRIPTION("ARC EMAC platform driver");
  96MODULE_LICENSE("GPL");
  97