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stmmac_platform.c
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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 <[email protected]>
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 __devinit 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 
38  if (!np)
39  return -ENODEV;
40 
41  *mac = of_get_mac_address(np);
42  plat->interface = of_get_phy_mode(np);
43  plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
44  sizeof(struct stmmac_mdio_bus_data),
45  GFP_KERNEL);
46 
47  /*
48  * Currently only the properties needed on SPEAr600
49  * are provided. All other properties should be added
50  * once needed on other platforms.
51  */
52  if (of_device_is_compatible(np, "st,spear600-gmac") ||
53  of_device_is_compatible(np, "snps,dwmac-3.70a") ||
54  of_device_is_compatible(np, "snps,dwmac")) {
55  plat->has_gmac = 1;
56  plat->pmt = 1;
57  }
58 
59  return 0;
60 }
61 #else
62 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev,
63  struct plat_stmmacenet_data *plat,
64  const char **mac)
65 {
66  return -ENOSYS;
67 }
68 #endif /* CONFIG_OF */
69 
77 static int __devinit stmmac_pltfr_probe(struct platform_device *pdev)
78 {
79  int ret = 0;
80  struct resource *res;
81  struct device *dev = &pdev->dev;
82  void __iomem *addr = NULL;
83  struct stmmac_priv *priv = NULL;
85  const char *mac = NULL;
86 
87  res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
88  if (!res)
89  return -ENODEV;
90 
91  addr = devm_request_and_ioremap(dev, res);
92  if (!addr) {
93  pr_err("%s: ERROR: memory mapping failed", __func__);
94  return -ENOMEM;
95  }
96 
97  if (pdev->dev.of_node) {
98  plat_dat = devm_kzalloc(&pdev->dev,
99  sizeof(struct plat_stmmacenet_data),
100  GFP_KERNEL);
101  if (!plat_dat) {
102  pr_err("%s: ERROR: no memory", __func__);
103  return -ENOMEM;
104  }
105 
106  ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
107  if (ret) {
108  pr_err("%s: main dt probe failed", __func__);
109  return ret;
110  }
111  } else {
112  plat_dat = pdev->dev.platform_data;
113  }
114 
115  /* Custom initialisation (if needed)*/
116  if (plat_dat->init) {
117  ret = plat_dat->init(pdev);
118  if (unlikely(ret))
119  return ret;
120  }
121 
122  priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
123  if (!priv) {
124  pr_err("%s: main driver probe failed", __func__);
125  return -ENODEV;
126  }
127 
128  /* Get MAC address if available (DT) */
129  if (mac)
130  memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
131 
132  /* Get the MAC information */
133  priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
134  if (priv->dev->irq == -ENXIO) {
135  pr_err("%s: ERROR: MAC IRQ configuration "
136  "information not found\n", __func__);
137  return -ENXIO;
138  }
139 
140  /*
141  * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
142  * The external wake up irq can be passed through the platform code
143  * named as "eth_wake_irq"
144  *
145  * In case the wake up interrupt is not passed from the platform
146  * so the driver will continue to use the mac irq (ndev->irq)
147  */
148  priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
149  if (priv->wol_irq == -ENXIO)
150  priv->wol_irq = priv->dev->irq;
151 
152  priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
153 
154  platform_set_drvdata(pdev, priv->dev);
155 
156  pr_debug("STMMAC platform driver registration completed");
157 
158  return 0;
159 }
160 
167 static int stmmac_pltfr_remove(struct platform_device *pdev)
168 {
169  struct net_device *ndev = platform_get_drvdata(pdev);
170  struct stmmac_priv *priv = netdev_priv(ndev);
171  int ret = stmmac_dvr_remove(ndev);
172 
173  if (priv->plat->exit)
174  priv->plat->exit(pdev);
175 
176  platform_set_drvdata(pdev, NULL);
177 
178  return ret;
179 }
180 
181 #ifdef CONFIG_PM
182 static int stmmac_pltfr_suspend(struct device *dev)
183 {
184  struct net_device *ndev = dev_get_drvdata(dev);
185 
186  return stmmac_suspend(ndev);
187 }
188 
189 static int stmmac_pltfr_resume(struct device *dev)
190 {
191  struct net_device *ndev = dev_get_drvdata(dev);
192 
193  return stmmac_resume(ndev);
194 }
195 
196 int stmmac_pltfr_freeze(struct device *dev)
197 {
198  int ret;
199  struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
200  struct net_device *ndev = dev_get_drvdata(dev);
201  struct platform_device *pdev = to_platform_device(dev);
202 
203  ret = stmmac_freeze(ndev);
204  if (plat_dat->exit)
205  plat_dat->exit(pdev);
206 
207  return ret;
208 }
209 
210 int stmmac_pltfr_restore(struct device *dev)
211 {
212  struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev);
213  struct net_device *ndev = dev_get_drvdata(dev);
214  struct platform_device *pdev = to_platform_device(dev);
215 
216  if (plat_dat->init)
217  plat_dat->init(pdev);
218 
219  return stmmac_restore(ndev);
220 }
221 
222 static const struct dev_pm_ops stmmac_pltfr_pm_ops = {
223  .suspend = stmmac_pltfr_suspend,
224  .resume = stmmac_pltfr_resume,
225  .freeze = stmmac_pltfr_freeze,
226  .thaw = stmmac_pltfr_restore,
227  .restore = stmmac_pltfr_restore,
228 };
229 #else
230 static const struct dev_pm_ops stmmac_pltfr_pm_ops;
231 #endif /* CONFIG_PM */
232 
233 static const struct of_device_id stmmac_dt_ids[] = {
234  { .compatible = "st,spear600-gmac"},
235  { .compatible = "snps,dwmac-3.70a"},
236  { .compatible = "snps,dwmac"},
237  { /* sentinel */ }
238 };
239 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
240 
242  .probe = stmmac_pltfr_probe,
243  .remove = stmmac_pltfr_remove,
244  .driver = {
245  .name = STMMAC_RESOURCE_NAME,
246  .owner = THIS_MODULE,
247  .pm = &stmmac_pltfr_pm_ops,
248  .of_match_table = of_match_ptr(stmmac_dt_ids),
249  },
250 };
251 
252 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
253 MODULE_AUTHOR("Giuseppe Cavallaro <[email protected]>");
254 MODULE_LICENSE("GPL");