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 { 30 struct device_node *np = pdev->dev.of_node; 31 struct sxgbe_dma_cfg *dma_cfg; 32 int err; 33 34 if (!np) 35 return -ENODEV; 36 37 err = of_get_phy_mode(np, &plat->interface); 38 if (err && err != -ENODEV) 39 return err; 40 41 plat->bus_id = of_alias_get_id(np, "ethernet"); 42 if (plat->bus_id < 0) 43 plat->bus_id = 0; 44 45 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 46 sizeof(*plat->mdio_bus_data), 47 GFP_KERNEL); 48 if (!plat->mdio_bus_data) 49 return -ENOMEM; 50 51 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL); 52 if (!dma_cfg) 53 return -ENOMEM; 54 55 plat->dma_cfg = dma_cfg; 56 of_property_read_u32(np, "samsung,pbl", &dma_cfg->pbl); 57 if (of_property_read_u32(np, "samsung,burst-map", &dma_cfg->burst_map) == 0) 58 dma_cfg->fixed_burst = true; 59 60 return 0; 61 } 62 #else 63 static int sxgbe_probe_config_dt(struct platform_device *pdev, 64 struct sxgbe_plat_data *plat) 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 struct net_device *ndev = platform_get_drvdata(pdev); 86 struct device_node *node = dev->of_node; 87 88 /* Get memory resource */ 89 addr = devm_platform_ioremap_resource(pdev, 0); 90 if (IS_ERR(addr)) 91 return PTR_ERR(addr); 92 93 if (pdev->dev.of_node) { 94 plat_dat = devm_kzalloc(&pdev->dev, 95 sizeof(struct sxgbe_plat_data), 96 GFP_KERNEL); 97 if (!plat_dat) 98 return -ENOMEM; 99 100 ret = sxgbe_probe_config_dt(pdev, plat_dat); 101 if (ret) { 102 pr_err("%s: main dt probe failed\n", __func__); 103 return ret; 104 } 105 } 106 107 priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr); 108 if (!priv) { 109 pr_err("%s: main driver probe failed\n", __func__); 110 goto err_out; 111 } 112 113 /* Get the SXGBE common INT information */ 114 priv->irq = irq_of_parse_and_map(node, 0); 115 if (priv->irq <= 0) { 116 dev_err(dev, "sxgbe common irq parsing failed\n"); 117 goto err_drv_remove; 118 } 119 120 /* Get MAC address if available (DT) */ 121 of_get_ethdev_address(node, priv->dev); 122 123 /* Get the TX/RX IRQ numbers */ 124 for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) { 125 priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++); 126 if (priv->txq[i]->irq_no <= 0) { 127 dev_err(dev, "sxgbe tx irq parsing failed\n"); 128 goto err_tx_irq_unmap; 129 } 130 } 131 132 for (i = 0; i < SXGBE_RX_QUEUES; i++) { 133 priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++); 134 if (priv->rxq[i]->irq_no <= 0) { 135 dev_err(dev, "sxgbe rx irq parsing failed\n"); 136 goto err_rx_irq_unmap; 137 } 138 } 139 140 priv->lpi_irq = irq_of_parse_and_map(node, chan); 141 if (priv->lpi_irq <= 0) { 142 dev_err(dev, "sxgbe lpi irq parsing failed\n"); 143 goto err_rx_irq_unmap; 144 } 145 146 platform_set_drvdata(pdev, priv->dev); 147 148 pr_debug("platform driver registration completed\n"); 149 150 return 0; 151 152 err_rx_irq_unmap: 153 while (i--) 154 irq_dispose_mapping(priv->rxq[i]->irq_no); 155 i = SXGBE_TX_QUEUES; 156 err_tx_irq_unmap: 157 while (i--) 158 irq_dispose_mapping(priv->txq[i]->irq_no); 159 irq_dispose_mapping(priv->irq); 160 err_drv_remove: 161 sxgbe_drv_remove(ndev); 162 err_out: 163 return -ENODEV; 164 } 165 166 /** 167 * sxgbe_platform_remove 168 * @pdev: platform device pointer 169 * Description: this function calls the main to free the net resources 170 * and calls the platforms hook and release the resources (e.g. mem). 171 */ 172 static int sxgbe_platform_remove(struct platform_device *pdev) 173 { 174 struct net_device *ndev = platform_get_drvdata(pdev); 175 int ret = sxgbe_drv_remove(ndev); 176 177 return ret; 178 } 179 180 #ifdef CONFIG_PM 181 static int sxgbe_platform_suspend(struct device *dev) 182 { 183 struct net_device *ndev = dev_get_drvdata(dev); 184 185 return sxgbe_suspend(ndev); 186 } 187 188 static int sxgbe_platform_resume(struct device *dev) 189 { 190 struct net_device *ndev = dev_get_drvdata(dev); 191 192 return sxgbe_resume(ndev); 193 } 194 195 static int sxgbe_platform_freeze(struct device *dev) 196 { 197 struct net_device *ndev = dev_get_drvdata(dev); 198 199 return sxgbe_freeze(ndev); 200 } 201 202 static int sxgbe_platform_restore(struct device *dev) 203 { 204 struct net_device *ndev = dev_get_drvdata(dev); 205 206 return sxgbe_restore(ndev); 207 } 208 209 static const struct dev_pm_ops sxgbe_platform_pm_ops = { 210 .suspend = sxgbe_platform_suspend, 211 .resume = sxgbe_platform_resume, 212 .freeze = sxgbe_platform_freeze, 213 .thaw = sxgbe_platform_restore, 214 .restore = sxgbe_platform_restore, 215 }; 216 #else 217 static const struct dev_pm_ops sxgbe_platform_pm_ops; 218 #endif /* CONFIG_PM */ 219 220 static const struct of_device_id sxgbe_dt_ids[] = { 221 { .compatible = "samsung,sxgbe-v2.0a"}, 222 { /* sentinel */ } 223 }; 224 MODULE_DEVICE_TABLE(of, sxgbe_dt_ids); 225 226 static struct platform_driver sxgbe_platform_driver = { 227 .probe = sxgbe_platform_probe, 228 .remove = sxgbe_platform_remove, 229 .driver = { 230 .name = SXGBE_RESOURCE_NAME, 231 .pm = &sxgbe_platform_pm_ops, 232 .of_match_table = sxgbe_dt_ids, 233 }, 234 }; 235 236 int sxgbe_register_platform(void) 237 { 238 int err; 239 240 err = platform_driver_register(&sxgbe_platform_driver); 241 if (err) 242 pr_err("failed to register the platform driver\n"); 243 244 return err; 245 } 246 247 void sxgbe_unregister_platform(void) 248 { 249 platform_driver_unregister(&sxgbe_platform_driver); 250 } 251