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->has_gmac = 1; 54 plat->pmt = 1; 55 } 56 57 return 0; 58 } 59 #else 60 static int __devinit stmmac_probe_config_dt(struct platform_device *pdev, 61 struct plat_stmmacenet_data *plat, 62 const char **mac) 63 { 64 return -ENOSYS; 65 } 66 #endif /* CONFIG_OF */ 67 68 /** 69 * stmmac_pltfr_probe 70 * @pdev: platform device pointer 71 * Description: platform_device probe function. It allocates 72 * the necessary resources and invokes the main to init 73 * the net device, register the mdio bus etc. 74 */ 75 static int stmmac_pltfr_probe(struct platform_device *pdev) 76 { 77 int ret = 0; 78 struct resource *res; 79 void __iomem *addr = NULL; 80 struct stmmac_priv *priv = NULL; 81 struct plat_stmmacenet_data *plat_dat = NULL; 82 const char *mac = NULL; 83 84 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 85 if (!res) 86 return -ENODEV; 87 88 if (!request_mem_region(res->start, resource_size(res), pdev->name)) { 89 pr_err("%s: ERROR: memory allocation failed" 90 "cannot get the I/O addr 0x%x\n", 91 __func__, (unsigned int)res->start); 92 return -EBUSY; 93 } 94 95 addr = ioremap(res->start, resource_size(res)); 96 if (!addr) { 97 pr_err("%s: ERROR: memory mapping failed", __func__); 98 ret = -ENOMEM; 99 goto out_release_region; 100 } 101 102 if (pdev->dev.of_node) { 103 plat_dat = devm_kzalloc(&pdev->dev, 104 sizeof(struct plat_stmmacenet_data), 105 GFP_KERNEL); 106 if (!plat_dat) { 107 pr_err("%s: ERROR: no memory", __func__); 108 ret = -ENOMEM; 109 goto out_unmap; 110 } 111 112 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); 113 if (ret) { 114 pr_err("%s: main dt probe failed", __func__); 115 goto out_unmap; 116 } 117 } else { 118 plat_dat = pdev->dev.platform_data; 119 } 120 121 /* Custom initialisation (if needed)*/ 122 if (plat_dat->init) { 123 ret = plat_dat->init(pdev); 124 if (unlikely(ret)) 125 goto out_unmap; 126 } 127 128 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 129 if (!priv) { 130 pr_err("%s: main driver probe failed", __func__); 131 goto out_unmap; 132 } 133 134 /* Get MAC address if available (DT) */ 135 if (mac) 136 memcpy(priv->dev->dev_addr, mac, ETH_ALEN); 137 138 /* Get the MAC information */ 139 priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); 140 if (priv->dev->irq == -ENXIO) { 141 pr_err("%s: ERROR: MAC IRQ configuration " 142 "information not found\n", __func__); 143 ret = -ENXIO; 144 goto out_unmap; 145 } 146 147 /* 148 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq 149 * The external wake up irq can be passed through the platform code 150 * named as "eth_wake_irq" 151 * 152 * In case the wake up interrupt is not passed from the platform 153 * so the driver will continue to use the mac irq (ndev->irq) 154 */ 155 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 156 if (priv->wol_irq == -ENXIO) 157 priv->wol_irq = priv->dev->irq; 158 159 platform_set_drvdata(pdev, priv->dev); 160 161 pr_debug("STMMAC platform driver registration completed"); 162 163 return 0; 164 165 out_unmap: 166 iounmap(addr); 167 platform_set_drvdata(pdev, NULL); 168 169 out_release_region: 170 release_mem_region(res->start, resource_size(res)); 171 172 return ret; 173 } 174 175 /** 176 * stmmac_pltfr_remove 177 * @pdev: platform device pointer 178 * Description: this function calls the main to free the net resources 179 * and calls the platforms hook and release the resources (e.g. mem). 180 */ 181 static int stmmac_pltfr_remove(struct platform_device *pdev) 182 { 183 struct net_device *ndev = platform_get_drvdata(pdev); 184 struct stmmac_priv *priv = netdev_priv(ndev); 185 struct resource *res; 186 int ret = stmmac_dvr_remove(ndev); 187 188 if (priv->plat->exit) 189 priv->plat->exit(pdev); 190 191 platform_set_drvdata(pdev, NULL); 192 193 iounmap((void *)priv->ioaddr); 194 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 195 release_mem_region(res->start, resource_size(res)); 196 197 return ret; 198 } 199 200 #ifdef CONFIG_PM 201 static int stmmac_pltfr_suspend(struct device *dev) 202 { 203 struct net_device *ndev = dev_get_drvdata(dev); 204 205 return stmmac_suspend(ndev); 206 } 207 208 static int stmmac_pltfr_resume(struct device *dev) 209 { 210 struct net_device *ndev = dev_get_drvdata(dev); 211 212 return stmmac_resume(ndev); 213 } 214 215 int stmmac_pltfr_freeze(struct device *dev) 216 { 217 int ret; 218 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 219 struct net_device *ndev = dev_get_drvdata(dev); 220 struct platform_device *pdev = to_platform_device(dev); 221 222 ret = stmmac_freeze(ndev); 223 if (plat_dat->exit) 224 plat_dat->exit(pdev); 225 226 return ret; 227 } 228 229 int stmmac_pltfr_restore(struct device *dev) 230 { 231 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 232 struct net_device *ndev = dev_get_drvdata(dev); 233 struct platform_device *pdev = to_platform_device(dev); 234 235 if (plat_dat->init) 236 plat_dat->init(pdev); 237 238 return stmmac_restore(ndev); 239 } 240 241 static const struct dev_pm_ops stmmac_pltfr_pm_ops = { 242 .suspend = stmmac_pltfr_suspend, 243 .resume = stmmac_pltfr_resume, 244 .freeze = stmmac_pltfr_freeze, 245 .thaw = stmmac_pltfr_restore, 246 .restore = stmmac_pltfr_restore, 247 }; 248 #else 249 static const struct dev_pm_ops stmmac_pltfr_pm_ops; 250 #endif /* CONFIG_PM */ 251 252 static const struct of_device_id stmmac_dt_ids[] = { 253 { .compatible = "st,spear600-gmac", }, 254 { /* sentinel */ } 255 }; 256 MODULE_DEVICE_TABLE(of, stmmac_dt_ids); 257 258 static struct platform_driver stmmac_driver = { 259 .probe = stmmac_pltfr_probe, 260 .remove = stmmac_pltfr_remove, 261 .driver = { 262 .name = STMMAC_RESOURCE_NAME, 263 .owner = THIS_MODULE, 264 .pm = &stmmac_pltfr_pm_ops, 265 .of_match_table = of_match_ptr(stmmac_dt_ids), 266 }, 267 }; 268 269 module_platform_driver(stmmac_driver); 270 271 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 272 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 273 MODULE_LICENSE("GPL"); 274