1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 10G controller driver for Samsung SoCs 3 * 4 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com 6 * 7 * Author: Siva Reddy Kallam <siva.kallam@samsung.com> 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/etherdevice.h> 13 #include <linux/io.h> 14 #include <linux/module.h> 15 #include <linux/netdevice.h> 16 #include <linux/of.h> 17 #include <linux/of_irq.h> 18 #include <linux/of_net.h> 19 #include <linux/phy.h> 20 #include <linux/platform_device.h> 21 #include <linux/sxgbe_platform.h> 22 23 #include "sxgbe_common.h" 24 #include "sxgbe_reg.h" 25 26 #ifdef CONFIG_OF 27 static int sxgbe_probe_config_dt(struct platform_device *pdev, 28 struct sxgbe_plat_data *plat, 29 const char **mac) 30 { 31 struct device_node *np = pdev->dev.of_node; 32 struct sxgbe_dma_cfg *dma_cfg; 33 34 if (!np) 35 return -ENODEV; 36 37 *mac = of_get_mac_address(np); 38 plat->interface = of_get_phy_mode(np); 39 40 plat->bus_id = of_alias_get_id(np, "ethernet"); 41 if (plat->bus_id < 0) 42 plat->bus_id = 0; 43 44 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 45 sizeof(*plat->mdio_bus_data), 46 GFP_KERNEL); 47 if (!plat->mdio_bus_data) 48 return -ENOMEM; 49 50 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL); 51 if (!dma_cfg) 52 return -ENOMEM; 53 54 plat->dma_cfg = dma_cfg; 55 of_property_read_u32(np, "samsung,pbl", &dma_cfg->pbl); 56 if (of_property_read_u32(np, "samsung,burst-map", &dma_cfg->burst_map) == 0) 57 dma_cfg->fixed_burst = true; 58 59 return 0; 60 } 61 #else 62 static int sxgbe_probe_config_dt(struct platform_device *pdev, 63 struct sxgbe_plat_data *plat, 64 const char **mac) 65 { 66 return -ENOSYS; 67 } 68 #endif /* CONFIG_OF */ 69 70 /** 71 * sxgbe_platform_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 sxgbe_platform_probe(struct platform_device *pdev) 78 { 79 int ret; 80 int i, chan; 81 struct resource *res; 82 struct device *dev = &pdev->dev; 83 void __iomem *addr; 84 struct sxgbe_priv_data *priv = NULL; 85 struct sxgbe_plat_data *plat_dat = NULL; 86 const char *mac = NULL; 87 struct net_device *ndev = platform_get_drvdata(pdev); 88 struct device_node *node = dev->of_node; 89 90 /* Get memory resource */ 91 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 92 addr = devm_ioremap_resource(dev, res); 93 if (IS_ERR(addr)) 94 return PTR_ERR(addr); 95 96 if (pdev->dev.of_node) { 97 plat_dat = devm_kzalloc(&pdev->dev, 98 sizeof(struct sxgbe_plat_data), 99 GFP_KERNEL); 100 if (!plat_dat) 101 return -ENOMEM; 102 103 ret = sxgbe_probe_config_dt(pdev, plat_dat, &mac); 104 if (ret) { 105 pr_err("%s: main dt probe failed\n", __func__); 106 return ret; 107 } 108 } 109 110 priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr); 111 if (!priv) { 112 pr_err("%s: main driver probe failed\n", __func__); 113 goto err_out; 114 } 115 116 /* Get the SXGBE common INT information */ 117 priv->irq = irq_of_parse_and_map(node, 0); 118 if (priv->irq <= 0) { 119 dev_err(dev, "sxgbe common irq parsing failed\n"); 120 goto err_drv_remove; 121 } 122 123 /* Get MAC address if available (DT) */ 124 if (!IS_ERR_OR_NULL(mac)) 125 ether_addr_copy(priv->dev->dev_addr, mac); 126 127 /* Get the TX/RX IRQ numbers */ 128 for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) { 129 priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++); 130 if (priv->txq[i]->irq_no <= 0) { 131 dev_err(dev, "sxgbe tx irq parsing failed\n"); 132 goto err_tx_irq_unmap; 133 } 134 } 135 136 for (i = 0; i < SXGBE_RX_QUEUES; i++) { 137 priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++); 138 if (priv->rxq[i]->irq_no <= 0) { 139 dev_err(dev, "sxgbe rx irq parsing failed\n"); 140 goto err_rx_irq_unmap; 141 } 142 } 143 144 priv->lpi_irq = irq_of_parse_and_map(node, chan); 145 if (priv->lpi_irq <= 0) { 146 dev_err(dev, "sxgbe lpi irq parsing failed\n"); 147 goto err_rx_irq_unmap; 148 } 149 150 platform_set_drvdata(pdev, priv->dev); 151 152 pr_debug("platform driver registration completed\n"); 153 154 return 0; 155 156 err_rx_irq_unmap: 157 while (i--) 158 irq_dispose_mapping(priv->rxq[i]->irq_no); 159 i = SXGBE_TX_QUEUES; 160 err_tx_irq_unmap: 161 while (i--) 162 irq_dispose_mapping(priv->txq[i]->irq_no); 163 irq_dispose_mapping(priv->irq); 164 err_drv_remove: 165 sxgbe_drv_remove(ndev); 166 err_out: 167 return -ENODEV; 168 } 169 170 /** 171 * sxgbe_platform_remove 172 * @pdev: platform device pointer 173 * Description: this function calls the main to free the net resources 174 * and calls the platforms hook and release the resources (e.g. mem). 175 */ 176 static int sxgbe_platform_remove(struct platform_device *pdev) 177 { 178 struct net_device *ndev = platform_get_drvdata(pdev); 179 int ret = sxgbe_drv_remove(ndev); 180 181 return ret; 182 } 183 184 #ifdef CONFIG_PM 185 static int sxgbe_platform_suspend(struct device *dev) 186 { 187 struct net_device *ndev = dev_get_drvdata(dev); 188 189 return sxgbe_suspend(ndev); 190 } 191 192 static int sxgbe_platform_resume(struct device *dev) 193 { 194 struct net_device *ndev = dev_get_drvdata(dev); 195 196 return sxgbe_resume(ndev); 197 } 198 199 static int sxgbe_platform_freeze(struct device *dev) 200 { 201 struct net_device *ndev = dev_get_drvdata(dev); 202 203 return sxgbe_freeze(ndev); 204 } 205 206 static int sxgbe_platform_restore(struct device *dev) 207 { 208 struct net_device *ndev = dev_get_drvdata(dev); 209 210 return sxgbe_restore(ndev); 211 } 212 213 static const struct dev_pm_ops sxgbe_platform_pm_ops = { 214 .suspend = sxgbe_platform_suspend, 215 .resume = sxgbe_platform_resume, 216 .freeze = sxgbe_platform_freeze, 217 .thaw = sxgbe_platform_restore, 218 .restore = sxgbe_platform_restore, 219 }; 220 #else 221 static const struct dev_pm_ops sxgbe_platform_pm_ops; 222 #endif /* CONFIG_PM */ 223 224 static const struct of_device_id sxgbe_dt_ids[] = { 225 { .compatible = "samsung,sxgbe-v2.0a"}, 226 { /* sentinel */ } 227 }; 228 MODULE_DEVICE_TABLE(of, sxgbe_dt_ids); 229 230 static struct platform_driver sxgbe_platform_driver = { 231 .probe = sxgbe_platform_probe, 232 .remove = sxgbe_platform_remove, 233 .driver = { 234 .name = SXGBE_RESOURCE_NAME, 235 .pm = &sxgbe_platform_pm_ops, 236 .of_match_table = of_match_ptr(sxgbe_dt_ids), 237 }, 238 }; 239 240 int sxgbe_register_platform(void) 241 { 242 int err; 243 244 err = platform_driver_register(&sxgbe_platform_driver); 245 if (err) 246 pr_err("failed to register the platform driver\n"); 247 248 return err; 249 } 250 251 void sxgbe_unregister_platform(void) 252 { 253 platform_driver_unregister(&sxgbe_platform_driver); 254 } 255