| Romain Perier | 23d2d9a | 2014-08-26 13:14:51 +0000 | [diff] [blame] | 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 | |
| 29 | static 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); |
| 61 | out_netdev: |
| 62 | if (err) |
| 63 | free_netdev(ndev); |
| 64 | return err; |
| 65 | } |
| 66 | |
| 67 | static 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 | |
| 77 | static const struct of_device_id emac_arc_dt_ids[] = { |
| 78 | { .compatible = "snps,arc-emac" }, |
| 79 | { /* Sentinel */ } |
| 80 | }; |
| 81 | |
| 82 | static struct platform_driver emac_arc_driver = { |
| 83 | .probe = emac_arc_probe, |
| 84 | .remove = emac_arc_remove, |
| 85 | .driver = { |
| 86 | .name = DRV_NAME, |
| 87 | .of_match_table = emac_arc_dt_ids, |
| 88 | }, |
| 89 | }; |
| 90 | |
| 91 | module_platform_driver(emac_arc_driver); |
| 92 | |
| 93 | MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>"); |
| 94 | MODULE_DESCRIPTION("ARC EMAC platform driver"); |
| 95 | MODULE_LICENSE("GPL"); |