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 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 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 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; 84 struct plat_stmmacenet_data *plat_dat = 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 } 160 161 /** 162 * stmmac_pltfr_remove 163 * @pdev: platform device pointer 164 * Description: this function calls the main to free the net resources 165 * and calls the platforms hook and release the resources (e.g. mem). 166 */ 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); 240 241 struct platform_driver stmmac_pltfr_driver = { 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 <peppe.cavallaro@st.com>"); 254 MODULE_LICENSE("GPL"); 255