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 device *dev = &pdev->dev; 82 void __iomem *addr; 83 struct sxgbe_priv_data *priv = NULL; 84 struct sxgbe_plat_data *plat_dat = NULL; 85 const char *mac = NULL; 86 struct net_device *ndev = platform_get_drvdata(pdev); 87 struct device_node *node = dev->of_node; 88 89 /* Get memory resource */ 90 addr = devm_platform_ioremap_resource(pdev, 0); 91 if (IS_ERR(addr)) 92 return PTR_ERR(addr); 93 94 if (pdev->dev.of_node) { 95 plat_dat = devm_kzalloc(&pdev->dev, 96 sizeof(struct sxgbe_plat_data), 97 GFP_KERNEL); 98 if (!plat_dat) 99 return -ENOMEM; 100 101 ret = sxgbe_probe_config_dt(pdev, plat_dat, &mac); 102 if (ret) { 103 pr_err("%s: main dt probe failed\n", __func__); 104 return ret; 105 } 106 } 107 108 priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr); 109 if (!priv) { 110 pr_err("%s: main driver probe failed\n", __func__); 111 goto err_out; 112 } 113 114 /* Get the SXGBE common INT information */ 115 priv->irq = irq_of_parse_and_map(node, 0); 116 if (priv->irq <= 0) { 117 dev_err(dev, "sxgbe common irq parsing failed\n"); 118 goto err_drv_remove; 119 } 120 121 /* Get MAC address if available (DT) */ 122 if (!IS_ERR_OR_NULL(mac)) 123 ether_addr_copy(priv->dev->dev_addr, mac); 124 125 /* Get the TX/RX IRQ numbers */ 126 for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) { 127 priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++); 128 if (priv->txq[i]->irq_no <= 0) { 129 dev_err(dev, "sxgbe tx irq parsing failed\n"); 130 goto err_tx_irq_unmap; 131 } 132 } 133 134 for (i = 0; i < SXGBE_RX_QUEUES; i++) { 135 priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++); 136 if (priv->rxq[i]->irq_no <= 0) { 137 dev_err(dev, "sxgbe rx irq parsing failed\n"); 138 goto err_rx_irq_unmap; 139 } 140 } 141 142 priv->lpi_irq = irq_of_parse_and_map(node, chan); 143 if (priv->lpi_irq <= 0) { 144 dev_err(dev, "sxgbe lpi irq parsing failed\n"); 145 goto err_rx_irq_unmap; 146 } 147 148 platform_set_drvdata(pdev, priv->dev); 149 150 pr_debug("platform driver registration completed\n"); 151 152 return 0; 153 154 err_rx_irq_unmap: 155 while (i--) 156 irq_dispose_mapping(priv->rxq[i]->irq_no); 157 i = SXGBE_TX_QUEUES; 158 err_tx_irq_unmap: 159 while (i--) 160 irq_dispose_mapping(priv->txq[i]->irq_no); 161 irq_dispose_mapping(priv->irq); 162 err_drv_remove: 163 sxgbe_drv_remove(ndev); 164 err_out: 165 return -ENODEV; 166 } 167 168 /** 169 * sxgbe_platform_remove 170 * @pdev: platform device pointer 171 * Description: this function calls the main to free the net resources 172 * and calls the platforms hook and release the resources (e.g. mem). 173 */ 174 static int sxgbe_platform_remove(struct platform_device *pdev) 175 { 176 struct net_device *ndev = platform_get_drvdata(pdev); 177 int ret = sxgbe_drv_remove(ndev); 178 179 return ret; 180 } 181 182 #ifdef CONFIG_PM 183 static int sxgbe_platform_suspend(struct device *dev) 184 { 185 struct net_device *ndev = dev_get_drvdata(dev); 186 187 return sxgbe_suspend(ndev); 188 } 189 190 static int sxgbe_platform_resume(struct device *dev) 191 { 192 struct net_device *ndev = dev_get_drvdata(dev); 193 194 return sxgbe_resume(ndev); 195 } 196 197 static int sxgbe_platform_freeze(struct device *dev) 198 { 199 struct net_device *ndev = dev_get_drvdata(dev); 200 201 return sxgbe_freeze(ndev); 202 } 203 204 static int sxgbe_platform_restore(struct device *dev) 205 { 206 struct net_device *ndev = dev_get_drvdata(dev); 207 208 return sxgbe_restore(ndev); 209 } 210 211 static const struct dev_pm_ops sxgbe_platform_pm_ops = { 212 .suspend = sxgbe_platform_suspend, 213 .resume = sxgbe_platform_resume, 214 .freeze = sxgbe_platform_freeze, 215 .thaw = sxgbe_platform_restore, 216 .restore = sxgbe_platform_restore, 217 }; 218 #else 219 static const struct dev_pm_ops sxgbe_platform_pm_ops; 220 #endif /* CONFIG_PM */ 221 222 static const struct of_device_id sxgbe_dt_ids[] = { 223 { .compatible = "samsung,sxgbe-v2.0a"}, 224 { /* sentinel */ } 225 }; 226 MODULE_DEVICE_TABLE(of, sxgbe_dt_ids); 227 228 static struct platform_driver sxgbe_platform_driver = { 229 .probe = sxgbe_platform_probe, 230 .remove = sxgbe_platform_remove, 231 .driver = { 232 .name = SXGBE_RESOURCE_NAME, 233 .pm = &sxgbe_platform_pm_ops, 234 .of_match_table = of_match_ptr(sxgbe_dt_ids), 235 }, 236 }; 237 238 int sxgbe_register_platform(void) 239 { 240 int err; 241 242 err = platform_driver_register(&sxgbe_platform_driver); 243 if (err) 244 pr_err("failed to register the platform driver\n"); 245 246 return err; 247 } 248 249 void sxgbe_unregister_platform(void) 250 { 251 platform_driver_unregister(&sxgbe_platform_driver); 252 } 253