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 "stmmac.h" 28 29 /** 30 * stmmac_pltfr_probe 31 * @pdev: platform device pointer 32 * Description: platform_device probe function. It allocates 33 * the necessary resources and invokes the main to init 34 * the net device, register the mdio bus etc. 35 */ 36 static int stmmac_pltfr_probe(struct platform_device *pdev) 37 { 38 int ret = 0; 39 struct resource *res; 40 void __iomem *addr = NULL; 41 struct stmmac_priv *priv = NULL; 42 struct plat_stmmacenet_data *plat_dat; 43 44 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 45 if (!res) 46 return -ENODEV; 47 48 if (!request_mem_region(res->start, resource_size(res), pdev->name)) { 49 pr_err("%s: ERROR: memory allocation failed" 50 "cannot get the I/O addr 0x%x\n", 51 __func__, (unsigned int)res->start); 52 return -EBUSY; 53 } 54 55 addr = ioremap(res->start, resource_size(res)); 56 if (!addr) { 57 pr_err("%s: ERROR: memory mapping failed", __func__); 58 ret = -ENOMEM; 59 goto out_release_region; 60 } 61 plat_dat = pdev->dev.platform_data; 62 63 /* Custom initialisation (if needed)*/ 64 if (plat_dat->init) { 65 ret = plat_dat->init(pdev); 66 if (unlikely(ret)) 67 goto out_unmap; 68 } 69 70 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 71 if (!priv) { 72 pr_err("%s: main driver probe failed", __func__); 73 goto out_unmap; 74 } 75 76 /* Get the MAC information */ 77 priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); 78 if (priv->dev->irq == -ENXIO) { 79 pr_err("%s: ERROR: MAC IRQ configuration " 80 "information not found\n", __func__); 81 ret = -ENXIO; 82 goto out_unmap; 83 } 84 85 /* 86 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq 87 * The external wake up irq can be passed through the platform code 88 * named as "eth_wake_irq" 89 * 90 * In case the wake up interrupt is not passed from the platform 91 * so the driver will continue to use the mac irq (ndev->irq) 92 */ 93 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 94 if (priv->wol_irq == -ENXIO) 95 priv->wol_irq = priv->dev->irq; 96 97 platform_set_drvdata(pdev, priv->dev); 98 99 pr_debug("STMMAC platform driver registration completed"); 100 101 return 0; 102 103 out_unmap: 104 iounmap(addr); 105 platform_set_drvdata(pdev, NULL); 106 107 out_release_region: 108 release_mem_region(res->start, resource_size(res)); 109 110 return ret; 111 } 112 113 /** 114 * stmmac_pltfr_remove 115 * @pdev: platform device pointer 116 * Description: this function calls the main to free the net resources 117 * and calls the platforms hook and release the resources (e.g. mem). 118 */ 119 static int stmmac_pltfr_remove(struct platform_device *pdev) 120 { 121 struct net_device *ndev = platform_get_drvdata(pdev); 122 struct stmmac_priv *priv = netdev_priv(ndev); 123 struct resource *res; 124 int ret = stmmac_dvr_remove(ndev); 125 126 if (priv->plat->exit) 127 priv->plat->exit(pdev); 128 129 if (priv->plat->exit) 130 priv->plat->exit(pdev); 131 132 platform_set_drvdata(pdev, NULL); 133 134 iounmap((void *)priv->ioaddr); 135 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 136 release_mem_region(res->start, resource_size(res)); 137 138 return ret; 139 } 140 141 #ifdef CONFIG_PM 142 static int stmmac_pltfr_suspend(struct device *dev) 143 { 144 struct net_device *ndev = dev_get_drvdata(dev); 145 146 return stmmac_suspend(ndev); 147 } 148 149 static int stmmac_pltfr_resume(struct device *dev) 150 { 151 struct net_device *ndev = dev_get_drvdata(dev); 152 153 return stmmac_resume(ndev); 154 } 155 156 int stmmac_pltfr_freeze(struct device *dev) 157 { 158 struct net_device *ndev = dev_get_drvdata(dev); 159 160 return stmmac_freeze(ndev); 161 } 162 163 int stmmac_pltfr_restore(struct device *dev) 164 { 165 struct net_device *ndev = dev_get_drvdata(dev); 166 167 return stmmac_restore(ndev); 168 } 169 170 static const struct dev_pm_ops stmmac_pltfr_pm_ops = { 171 .suspend = stmmac_pltfr_suspend, 172 .resume = stmmac_pltfr_resume, 173 .freeze = stmmac_pltfr_freeze, 174 .thaw = stmmac_pltfr_restore, 175 .restore = stmmac_pltfr_restore, 176 }; 177 #else 178 static const struct dev_pm_ops stmmac_pltfr_pm_ops; 179 #endif /* CONFIG_PM */ 180 181 static struct platform_driver stmmac_driver = { 182 .probe = stmmac_pltfr_probe, 183 .remove = stmmac_pltfr_remove, 184 .driver = { 185 .name = STMMAC_RESOURCE_NAME, 186 .owner = THIS_MODULE, 187 .pm = &stmmac_pltfr_pm_ops, 188 }, 189 }; 190 191 module_platform_driver(stmmac_driver); 192 193 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 194 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 195 MODULE_LICENSE("GPL"); 196