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 struct stmmac_dma_cfg *dma_cfg; 38 39 if (!np) 40 return -ENODEV; 41 42 *mac = of_get_mac_address(np); 43 plat->interface = of_get_phy_mode(np); 44 45 plat->bus_id = of_alias_get_id(np, "ethernet"); 46 if (plat->bus_id < 0) 47 plat->bus_id = 0; 48 49 of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr); 50 51 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 52 sizeof(struct stmmac_mdio_bus_data), 53 GFP_KERNEL); 54 55 /* 56 * Currently only the properties needed on SPEAr600 57 * are provided. All other properties should be added 58 * once needed on other platforms. 59 */ 60 if (of_device_is_compatible(np, "st,spear600-gmac") || 61 of_device_is_compatible(np, "snps,dwmac-3.70a") || 62 of_device_is_compatible(np, "snps,dwmac")) { 63 plat->has_gmac = 1; 64 plat->pmt = 1; 65 } 66 67 if (of_device_is_compatible(np, "snps,dwmac-3.610") || 68 of_device_is_compatible(np, "snps,dwmac-3.710")) { 69 plat->enh_desc = 1; 70 plat->bugged_jumbo = 1; 71 plat->force_sf_dma_mode = 1; 72 } 73 74 if (of_find_property(np, "snps,pbl", NULL)) { 75 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), 76 GFP_KERNEL); 77 if (!dma_cfg) 78 return -ENOMEM; 79 plat->dma_cfg = dma_cfg; 80 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); 81 dma_cfg->fixed_burst = 82 of_property_read_bool(np, "snps,fixed-burst"); 83 dma_cfg->mixed_burst = 84 of_property_read_bool(np, "snps,mixed-burst"); 85 } 86 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); 87 if (plat->force_thresh_dma_mode) { 88 plat->force_sf_dma_mode = 0; 89 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set."); 90 } 91 92 return 0; 93 } 94 #else 95 static int stmmac_probe_config_dt(struct platform_device *pdev, 96 struct plat_stmmacenet_data *plat, 97 const char **mac) 98 { 99 return -ENOSYS; 100 } 101 #endif /* CONFIG_OF */ 102 103 /** 104 * stmmac_pltfr_probe 105 * @pdev: platform device pointer 106 * Description: platform_device probe function. It allocates 107 * the necessary resources and invokes the main to init 108 * the net device, register the mdio bus etc. 109 */ 110 static int stmmac_pltfr_probe(struct platform_device *pdev) 111 { 112 int ret = 0; 113 struct resource *res; 114 struct device *dev = &pdev->dev; 115 void __iomem *addr = NULL; 116 struct stmmac_priv *priv = NULL; 117 struct plat_stmmacenet_data *plat_dat = NULL; 118 const char *mac = NULL; 119 120 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 121 addr = devm_ioremap_resource(dev, res); 122 if (IS_ERR(addr)) 123 return PTR_ERR(addr); 124 125 plat_dat = dev_get_platdata(&pdev->dev); 126 if (pdev->dev.of_node) { 127 if (!plat_dat) 128 plat_dat = devm_kzalloc(&pdev->dev, 129 sizeof(struct plat_stmmacenet_data), 130 GFP_KERNEL); 131 if (!plat_dat) { 132 pr_err("%s: ERROR: no memory", __func__); 133 return -ENOMEM; 134 } 135 136 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); 137 if (ret) { 138 pr_err("%s: main dt probe failed", __func__); 139 return ret; 140 } 141 } 142 143 /* Custom initialisation (if needed)*/ 144 if (plat_dat->init) { 145 ret = plat_dat->init(pdev); 146 if (unlikely(ret)) 147 return ret; 148 } 149 150 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); 151 if (!priv) { 152 pr_err("%s: main driver probe failed", __func__); 153 return -ENODEV; 154 } 155 156 /* Get MAC address if available (DT) */ 157 if (mac) 158 memcpy(priv->dev->dev_addr, mac, ETH_ALEN); 159 160 /* Get the MAC information */ 161 priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); 162 if (priv->dev->irq == -ENXIO) { 163 pr_err("%s: ERROR: MAC IRQ configuration " 164 "information not found\n", __func__); 165 return -ENXIO; 166 } 167 168 /* 169 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq 170 * The external wake up irq can be passed through the platform code 171 * named as "eth_wake_irq" 172 * 173 * In case the wake up interrupt is not passed from the platform 174 * so the driver will continue to use the mac irq (ndev->irq) 175 */ 176 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); 177 if (priv->wol_irq == -ENXIO) 178 priv->wol_irq = priv->dev->irq; 179 180 priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); 181 182 platform_set_drvdata(pdev, priv->dev); 183 184 pr_debug("STMMAC platform driver registration completed"); 185 186 return 0; 187 } 188 189 /** 190 * stmmac_pltfr_remove 191 * @pdev: platform device pointer 192 * Description: this function calls the main to free the net resources 193 * and calls the platforms hook and release the resources (e.g. mem). 194 */ 195 static int stmmac_pltfr_remove(struct platform_device *pdev) 196 { 197 struct net_device *ndev = platform_get_drvdata(pdev); 198 struct stmmac_priv *priv = netdev_priv(ndev); 199 int ret = stmmac_dvr_remove(ndev); 200 201 if (priv->plat->exit) 202 priv->plat->exit(pdev); 203 204 return ret; 205 } 206 207 #ifdef CONFIG_PM 208 static int stmmac_pltfr_suspend(struct device *dev) 209 { 210 struct net_device *ndev = dev_get_drvdata(dev); 211 212 return stmmac_suspend(ndev); 213 } 214 215 static int stmmac_pltfr_resume(struct device *dev) 216 { 217 struct net_device *ndev = dev_get_drvdata(dev); 218 219 return stmmac_resume(ndev); 220 } 221 222 int stmmac_pltfr_freeze(struct device *dev) 223 { 224 int ret; 225 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 226 struct net_device *ndev = dev_get_drvdata(dev); 227 struct platform_device *pdev = to_platform_device(dev); 228 229 ret = stmmac_freeze(ndev); 230 if (plat_dat->exit) 231 plat_dat->exit(pdev); 232 233 return ret; 234 } 235 236 int stmmac_pltfr_restore(struct device *dev) 237 { 238 struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 239 struct net_device *ndev = dev_get_drvdata(dev); 240 struct platform_device *pdev = to_platform_device(dev); 241 242 if (plat_dat->init) 243 plat_dat->init(pdev); 244 245 return stmmac_restore(ndev); 246 } 247 248 static const struct dev_pm_ops stmmac_pltfr_pm_ops = { 249 .suspend = stmmac_pltfr_suspend, 250 .resume = stmmac_pltfr_resume, 251 .freeze = stmmac_pltfr_freeze, 252 .thaw = stmmac_pltfr_restore, 253 .restore = stmmac_pltfr_restore, 254 }; 255 #else 256 static const struct dev_pm_ops stmmac_pltfr_pm_ops; 257 #endif /* CONFIG_PM */ 258 259 static const struct of_device_id stmmac_dt_ids[] = { 260 { .compatible = "st,spear600-gmac"}, 261 { .compatible = "snps,dwmac-3.610"}, 262 { .compatible = "snps,dwmac-3.70a"}, 263 { .compatible = "snps,dwmac-3.710"}, 264 { .compatible = "snps,dwmac"}, 265 { /* sentinel */ } 266 }; 267 MODULE_DEVICE_TABLE(of, stmmac_dt_ids); 268 269 struct platform_driver stmmac_pltfr_driver = { 270 .probe = stmmac_pltfr_probe, 271 .remove = stmmac_pltfr_remove, 272 .driver = { 273 .name = STMMAC_RESOURCE_NAME, 274 .owner = THIS_MODULE, 275 .pm = &stmmac_pltfr_pm_ops, 276 .of_match_table = of_match_ptr(stmmac_dt_ids), 277 }, 278 }; 279 280 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver"); 281 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 282 MODULE_LICENSE("GPL"); 283