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 <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 70 /** 71 * stmmac_pltfr_probe 72 * @pdev: platform device pointer 73 * Description: platform_device probe function. It allocates 74 * the necessary resources and invokes the main to init 75 * the net device, register the mdio bus etc. 76 */ 77 static int __devinit stmmac_pltfr_probe(struct platform_device *pdev) 78 { 79 int ret = 0; 80 struct resource *res; 81 void __iomem *addr = NULL; 82 struct stmmac_priv *priv = NULL; 83 struct plat_stmmacenet_data *plat_dat = NULL; 84 const char *mac = NULL; 85 86 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 87 if (!res) 88 return -ENODEV; 89 90 if (!request_mem_region(res->start, resource_size(res), pdev->name)) { 91 pr_err("%s: ERROR: memory allocation failed" 92 "cannot get the I/O addr 0x%x\n", 93 __func__, (unsigned int)res->start); 94 return -EBUSY; 95 } 96 97 addr = ioremap(res->start, resource_size(res)); 98 if (!addr) { 99 pr_err("%s: ERROR: memory mapping failed", __func__); 100 ret = -ENOMEM; 101 goto out_release_region; 102 } 103 104 if (pdev->dev.of_node) { 105 plat_dat = devm_kzalloc(&pdev->dev, 106 sizeof(struct plat_stmmacenet_data), 107 GFP_KERNEL); 108 if (!plat_dat) { 109 pr_err("%s: ERROR: no memory", __func__); 110 ret = -ENOMEM; 111 goto out_unmap; 112 } 113 114 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); 115 if (ret) { 116 pr_err("%s: main dt probe failed", __func__); 117 goto out_unmap; 118 } 119 } else { 120 plat_dat = pdev->dev.platform_data; 121 } 122 123 /* Custom initialisation (if needed)*/ 124 if (plat_dat->init) { 125 ret = plat_dat->init(pdev); 126 if (unlikely(ret)) 127 goto out_unmap; 128 } 129 130 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 131 if (!priv) { 132 pr_err("%s: main driver probe failed", __func__); 133 goto out_unmap; 134 } 135 136 /* Get MAC address if available (DT) */ 137 if (mac) 138 memcpy(priv->dev->dev_addr, mac, ETH_ALEN); 139 140 /* Get the MAC information */ 141 priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); 142 if (priv->dev->irq == -ENXIO) { 143 pr_err("%s: ERROR: MAC IRQ configuration " 144 "information not found\n", __func__); 145 ret = -ENXIO; 146 goto out_unmap; 147 } 148 149 /* 150 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq 151 * The external wake up irq can be passed through the platform code 152 * named as "eth_wake_irq" 153 * 154 * In case the wake up interrupt is not passed from the platform 155 * so the driver will continue to use the mac irq (ndev->irq) 156 */ 157 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 158 if (priv->wol_irq == -ENXIO) 159 priv->wol_irq = priv->dev->irq; 160 161 priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); 162 163 platform_set_drvdata(pdev, priv->dev); 164 165 pr_debug("STMMAC platform driver registration completed"); 166 167 return 0; 168 169 out_unmap: 170 iounmap(addr); 171 platform_set_drvdata(pdev, NULL); 172 173 out_release_region: 174 release_mem_region(res->start, resource_size(res)); 175 176 return ret; 177 } 178 179 /** 180 * stmmac_pltfr_remove 181 * @pdev: platform device pointer 182 * Description: this function calls the main to free the net resources 183 * and calls the platforms hook and release the resources (e.g. mem). 184 */ 185 static int stmmac_pltfr_remove(struct platform_device *pdev) 186 { 187 struct net_device *ndev = platform_get_drvdata(pdev); 188 struct stmmac_priv *priv = netdev_priv(ndev); 189 struct resource *res; 190 int ret = stmmac_dvr_remove(ndev); 191 192 if (priv->plat->exit) 193 priv->plat->exit(pdev); 194 195 platform_set_drvdata(pdev, NULL); 196 197 iounmap((void __force __iomem *)priv->ioaddr); 198 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 199 release_mem_region(res->start, resource_size(res)); 200 201 return ret; 202 } 203 204 #ifdef CONFIG_PM 205 static int stmmac_pltfr_suspend(struct device *dev) 206 { 207 struct net_device *ndev = dev_get_drvdata(dev); 208 209 return stmmac_suspend(ndev); 210 } 211 212 static int stmmac_pltfr_resume(struct device *dev) 213 { 214 struct net_device *ndev = dev_get_drvdata(dev); 215 216 return stmmac_resume(ndev); 217 } 218 219 int stmmac_pltfr_freeze(struct device *dev) 220 { 221 int ret; 222 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 223 struct net_device *ndev = dev_get_drvdata(dev); 224 struct platform_device *pdev = to_platform_device(dev); 225 226 ret = stmmac_freeze(ndev); 227 if (plat_dat->exit) 228 plat_dat->exit(pdev); 229 230 return ret; 231 } 232 233 int stmmac_pltfr_restore(struct device *dev) 234 { 235 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 236 struct net_device *ndev = dev_get_drvdata(dev); 237 struct platform_device *pdev = to_platform_device(dev); 238 239 if (plat_dat->init) 240 plat_dat->init(pdev); 241 242 return stmmac_restore(ndev); 243 } 244 245 static const struct dev_pm_ops stmmac_pltfr_pm_ops = { 246 .suspend = stmmac_pltfr_suspend, 247 .resume = stmmac_pltfr_resume, 248 .freeze = stmmac_pltfr_freeze, 249 .thaw = stmmac_pltfr_restore, 250 .restore = stmmac_pltfr_restore, 251 }; 252 #else 253 static const struct dev_pm_ops stmmac_pltfr_pm_ops; 254 #endif /* CONFIG_PM */ 255 256 static const struct of_device_id stmmac_dt_ids[] = { 257 { .compatible = "st,spear600-gmac"}, 258 { .compatible = "snps,dwmac-3.70a"}, 259 { .compatible = "snps,dwmac"}, 260 { /* sentinel */ } 261 }; 262 MODULE_DEVICE_TABLE(of, stmmac_dt_ids); 263 264 struct platform_driver stmmac_pltfr_driver = { 265 .probe = stmmac_pltfr_probe, 266 .remove = stmmac_pltfr_remove, 267 .driver = { 268 .name = STMMAC_RESOURCE_NAME, 269 .owner = THIS_MODULE, 270 .pm = &stmmac_pltfr_pm_ops, 271 .of_match_table = of_match_ptr(stmmac_dt_ids), 272 }, 273 }; 274 275 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 276 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 277 MODULE_LICENSE("GPL"); 278