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 plat->pbl = 8; 54 plat->has_gmac = 1; 55 plat->pmt = 1; 56 } 57 58 return 0; 59 } 60 #else 61 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev, 62 struct plat_stmmacenet_data *plat, 63 const char **mac) 64 { 65 return -ENOSYS; 66 } 67 #endif /* CONFIG_OF */ 68 69 /** 70 * stmmac_pltfr_probe 71 * @pdev: platform device pointer 72 * Description: platform_device probe function. It allocates 73 * the necessary resources and invokes the main to init 74 * the net device, register the mdio bus etc. 75 */ 76 static int stmmac_pltfr_probe(struct platform_device *pdev) 77 { 78 int ret = 0; 79 struct resource *res; 80 void __iomem *addr = NULL; 81 struct stmmac_priv *priv = NULL; 82 struct plat_stmmacenet_data *plat_dat = NULL; 83 const char *mac = NULL; 84 85 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 86 if (!res) 87 return -ENODEV; 88 89 if (!request_mem_region(res->start, resource_size(res), pdev->name)) { 90 pr_err("%s: ERROR: memory allocation failed" 91 "cannot get the I/O addr 0x%x\n", 92 __func__, (unsigned int)res->start); 93 return -EBUSY; 94 } 95 96 addr = ioremap(res->start, resource_size(res)); 97 if (!addr) { 98 pr_err("%s: ERROR: memory mapping failed", __func__); 99 ret = -ENOMEM; 100 goto out_release_region; 101 } 102 103 if (pdev->dev.of_node) { 104 plat_dat = devm_kzalloc(&pdev->dev, 105 sizeof(struct plat_stmmacenet_data), 106 GFP_KERNEL); 107 if (!plat_dat) { 108 pr_err("%s: ERROR: no memory", __func__); 109 ret = -ENOMEM; 110 goto out_unmap; 111 } 112 113 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); 114 if (ret) { 115 pr_err("%s: main dt probe failed", __func__); 116 goto out_unmap; 117 } 118 } else { 119 plat_dat = pdev->dev.platform_data; 120 } 121 122 /* Custom initialisation (if needed)*/ 123 if (plat_dat->init) { 124 ret = plat_dat->init(pdev); 125 if (unlikely(ret)) 126 goto out_unmap; 127 } 128 129 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 130 if (!priv) { 131 pr_err("%s: main driver probe failed", __func__); 132 goto out_unmap; 133 } 134 135 /* Get MAC address if available (DT) */ 136 if (mac) 137 memcpy(priv->dev->dev_addr, mac, ETH_ALEN); 138 139 /* Get the MAC information */ 140 priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); 141 if (priv->dev->irq == -ENXIO) { 142 pr_err("%s: ERROR: MAC IRQ configuration " 143 "information not found\n", __func__); 144 ret = -ENXIO; 145 goto out_unmap; 146 } 147 148 /* 149 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq 150 * The external wake up irq can be passed through the platform code 151 * named as "eth_wake_irq" 152 * 153 * In case the wake up interrupt is not passed from the platform 154 * so the driver will continue to use the mac irq (ndev->irq) 155 */ 156 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 157 if (priv->wol_irq == -ENXIO) 158 priv->wol_irq = priv->dev->irq; 159 160 platform_set_drvdata(pdev, priv->dev); 161 162 pr_debug("STMMAC platform driver registration completed"); 163 164 return 0; 165 166 out_unmap: 167 iounmap(addr); 168 platform_set_drvdata(pdev, NULL); 169 170 out_release_region: 171 release_mem_region(res->start, resource_size(res)); 172 173 return ret; 174 } 175 176 /** 177 * stmmac_pltfr_remove 178 * @pdev: platform device pointer 179 * Description: this function calls the main to free the net resources 180 * and calls the platforms hook and release the resources (e.g. mem). 181 */ 182 static int stmmac_pltfr_remove(struct platform_device *pdev) 183 { 184 struct net_device *ndev = platform_get_drvdata(pdev); 185 struct stmmac_priv *priv = netdev_priv(ndev); 186 struct resource *res; 187 int ret = stmmac_dvr_remove(ndev); 188 189 if (priv->plat->exit) 190 priv->plat->exit(pdev); 191 192 if (priv->plat->exit) 193 priv->plat->exit(pdev); 194 195 platform_set_drvdata(pdev, NULL); 196 197 iounmap((void *)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 struct net_device *ndev = dev_get_drvdata(dev); 222 223 return stmmac_freeze(ndev); 224 } 225 226 int stmmac_pltfr_restore(struct device *dev) 227 { 228 struct net_device *ndev = dev_get_drvdata(dev); 229 230 return stmmac_restore(ndev); 231 } 232 233 static const struct dev_pm_ops stmmac_pltfr_pm_ops = { 234 .suspend = stmmac_pltfr_suspend, 235 .resume = stmmac_pltfr_resume, 236 .freeze = stmmac_pltfr_freeze, 237 .thaw = stmmac_pltfr_restore, 238 .restore = stmmac_pltfr_restore, 239 }; 240 #else 241 static const struct dev_pm_ops stmmac_pltfr_pm_ops; 242 #endif /* CONFIG_PM */ 243 244 static const struct of_device_id stmmac_dt_ids[] = { 245 { .compatible = "st,spear600-gmac", }, 246 { /* sentinel */ } 247 }; 248 MODULE_DEVICE_TABLE(of, stmmac_dt_ids); 249 250 static struct platform_driver stmmac_driver = { 251 .probe = stmmac_pltfr_probe, 252 .remove = stmmac_pltfr_remove, 253 .driver = { 254 .name = STMMAC_RESOURCE_NAME, 255 .owner = THIS_MODULE, 256 .pm = &stmmac_pltfr_pm_ops, 257 .of_match_table = of_match_ptr(stmmac_dt_ids), 258 }, 259 }; 260 261 module_platform_driver(stmmac_driver); 262 263 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 264 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 265 MODULE_LICENSE("GPL"); 266