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 MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
82 
83 static 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 
92 module_platform_driver(emac_arc_driver);
93 
94 MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
95 MODULE_DESCRIPTION("ARC EMAC platform driver");
96 MODULE_LICENSE("GPL");
97