stmmac_platform.c revision bfab27a146ed4d722c6d399f844f955f29cd2b81 
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 "stmmac.h"
28
29/**
30 * stmmac_pltfr_probe
31 * @pdev: platform device pointer
32 * Description: platform_device probe function. It allocates
33 * the necessary resources and invokes the main to init
34 * the net device, register the mdio bus etc.
35 */
36static int stmmac_pltfr_probe(struct platform_device *pdev)
37{
38	int ret = 0;
39	struct resource *res;
40	void __iomem *addr = NULL;
41	struct stmmac_priv *priv = NULL;
42	struct plat_stmmacenet_data *plat_dat;
43
44	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
45	if (!res)
46		return -ENODEV;
47
48	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
49		pr_err("%s: ERROR: memory allocation failed"
50		       "cannot get the I/O addr 0x%x\n",
51		       __func__, (unsigned int)res->start);
52		return -EBUSY;
53	}
54
55	addr = ioremap(res->start, resource_size(res));
56	if (!addr) {
57		pr_err("%s: ERROR: memory mapping failed", __func__);
58		ret = -ENOMEM;
59		goto out_release_region;
60	}
61	plat_dat = pdev->dev.platform_data;
62	priv = stmmac_dvr_probe(&(pdev->dev), plat_dat);
63	if (!priv) {
64		pr_err("%s: main drivr probe failed", __func__);
65		goto out_release_region;
66	}
67
68	priv->ioaddr = addr;
69	/* Set the I/O base addr */
70	priv->dev->base_addr = (unsigned long)addr;
71
72	/* Get the MAC information */
73	priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
74	if (priv->dev->irq == -ENXIO) {
75		pr_err("%s: ERROR: MAC IRQ configuration "
76		       "information not found\n", __func__);
77		ret = -ENXIO;
78		goto out_unmap;
79	}
80
81	/*
82	 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
83	 * The external wake up irq can be passed through the platform code
84	 * named as "eth_wake_irq"
85	 *
86	 * In case the wake up interrupt is not passed from the platform
87	 * so the driver will continue to use the mac irq (ndev->irq)
88	 */
89	priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
90	if (priv->wol_irq == -ENXIO)
91		priv->wol_irq = priv->dev->irq;
92
93	platform_set_drvdata(pdev, priv->dev);
94
95	/* Custom initialisation */
96	if (priv->plat->init) {
97		ret = priv->plat->init(pdev);
98		if (unlikely(ret))
99			goto out_unmap;
100	}
101
102	pr_debug("STMMAC platform driver registration completed");
103
104	return 0;
105
106out_unmap:
107	iounmap(addr);
108	platform_set_drvdata(pdev, NULL);
109
110out_release_region:
111	release_mem_region(res->start, resource_size(res));
112
113	return ret;
114}
115
116/**
117 * stmmac_pltfr_remove
118 * @pdev: platform device pointer
119 * Description: this function calls the main to free the net resources
120 * and calls the platforms hook and release the resources (e.g. mem).
121 */
122static int stmmac_pltfr_remove(struct platform_device *pdev)
123{
124	struct net_device *ndev = platform_get_drvdata(pdev);
125	struct stmmac_priv *priv = netdev_priv(ndev);
126	struct resource *res;
127	int ret = stmmac_dvr_remove(ndev);
128
129	if (priv->plat->exit)
130		priv->plat->exit(pdev);
131
132	if (priv->plat->exit)
133		priv->plat->exit(pdev);
134
135	platform_set_drvdata(pdev, NULL);
136
137	iounmap((void *)priv->ioaddr);
138	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
139	release_mem_region(res->start, resource_size(res));
140
141	return ret;
142}
143
144#ifdef CONFIG_PM
145static int stmmac_pltfr_suspend(struct device *dev)
146{
147	struct net_device *ndev = dev_get_drvdata(dev);
148
149	return stmmac_suspend(ndev);
150}
151
152static int stmmac_pltfr_resume(struct device *dev)
153{
154	struct net_device *ndev = dev_get_drvdata(dev);
155
156	return stmmac_resume(ndev);
157}
158
159int stmmac_pltfr_freeze(struct device *dev)
160{
161	struct net_device *ndev = dev_get_drvdata(dev);
162
163	return stmmac_freeze(ndev);
164}
165
166int stmmac_pltfr_restore(struct device *dev)
167{
168	struct net_device *ndev = dev_get_drvdata(dev);
169
170	return stmmac_restore(ndev);
171}
172
173static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
174	.suspend = stmmac_pltfr_suspend,
175	.resume = stmmac_pltfr_resume,
176	.freeze = stmmac_pltfr_freeze,
177	.thaw = stmmac_pltfr_restore,
178	.restore = stmmac_pltfr_restore,
179};
180#else
181static const struct dev_pm_ops stmmac_pltfr_pm_ops;
182#endif /* CONFIG_PM */
183
184static struct platform_driver stmmac_driver = {
185	.probe = stmmac_pltfr_probe,
186	.remove = stmmac_pltfr_remove,
187	.driver = {
188		   .name = STMMAC_RESOURCE_NAME,
189		   .owner = THIS_MODULE,
190		   .pm = &stmmac_pltfr_pm_ops,
191		   },
192};
193
194module_platform_driver(stmmac_driver);
195
196MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
197MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
198MODULE_LICENSE("GPL");
199