1/* 10G controller driver for Samsung SoCs 2 * 3 * Copyright (C) 2013 Samsung Electronics Co., Ltd. 4 * http://www.samsung.com 5 * 6 * Author: Siva Reddy Kallam <siva.kallam@samsung.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 14 15#include <linux/etherdevice.h> 16#include <linux/io.h> 17#include <linux/module.h> 18#include <linux/netdevice.h> 19#include <linux/of.h> 20#include <linux/of_irq.h> 21#include <linux/of_net.h> 22#include <linux/phy.h> 23#include <linux/platform_device.h> 24#include <linux/sxgbe_platform.h> 25 26#include "sxgbe_common.h" 27#include "sxgbe_reg.h" 28 29#ifdef CONFIG_OF 30static int sxgbe_probe_config_dt(struct platform_device *pdev, 31 struct sxgbe_plat_data *plat, 32 const char **mac) 33{ 34 struct device_node *np = pdev->dev.of_node; 35 struct sxgbe_dma_cfg *dma_cfg; 36 37 if (!np) 38 return -ENODEV; 39 40 *mac = of_get_mac_address(np); 41 plat->interface = of_get_phy_mode(np); 42 43 plat->bus_id = of_alias_get_id(np, "ethernet"); 44 if (plat->bus_id < 0) 45 plat->bus_id = 0; 46 47 plat->mdio_bus_data = devm_kzalloc(&pdev->dev, 48 sizeof(*plat->mdio_bus_data), 49 GFP_KERNEL); 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 63static int sxgbe_probe_config_dt(struct platform_device *pdev, 64 struct sxgbe_plat_data *plat, 65 const char **mac) 66{ 67 return -ENOSYS; 68} 69#endif /* CONFIG_OF */ 70 71/** 72 * sxgbe_platform_probe 73 * @pdev: platform device pointer 74 * Description: platform_device probe function. It allocates 75 * the necessary resources and invokes the main to init 76 * the net device, register the mdio bus etc. 77 */ 78static int sxgbe_platform_probe(struct platform_device *pdev) 79{ 80 int ret; 81 int i, chan; 82 struct resource *res; 83 struct device *dev = &pdev->dev; 84 void __iomem *addr; 85 struct sxgbe_priv_data *priv = NULL; 86 struct sxgbe_plat_data *plat_dat = NULL; 87 const char *mac = NULL; 88 struct net_device *ndev = platform_get_drvdata(pdev); 89 struct device_node *node = dev->of_node; 90 91 /* Get memory resource */ 92 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 93 if (!res) 94 goto err_out; 95 96 addr = devm_ioremap_resource(dev, res); 97 if (IS_ERR(addr)) 98 return PTR_ERR(addr); 99 100 if (pdev->dev.of_node) { 101 plat_dat = devm_kzalloc(&pdev->dev, 102 sizeof(struct sxgbe_plat_data), 103 GFP_KERNEL); 104 if (!plat_dat) 105 return -ENOMEM; 106 107 ret = sxgbe_probe_config_dt(pdev, plat_dat, &mac); 108 if (ret) { 109 pr_err("%s: main dt probe failed\n", __func__); 110 return ret; 111 } 112 } 113 114 /* Get MAC address if available (DT) */ 115 if (mac) 116 ether_addr_copy(priv->dev->dev_addr, mac); 117 118 priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr); 119 if (!priv) { 120 pr_err("%s: main driver probe failed\n", __func__); 121 goto err_out; 122 } 123 124 /* Get the SXGBE common INT information */ 125 priv->irq = irq_of_parse_and_map(node, 0); 126 if (priv->irq <= 0) { 127 dev_err(dev, "sxgbe common irq parsing failed\n"); 128 goto err_drv_remove; 129 } 130 131 /* Get the TX/RX IRQ numbers */ 132 for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) { 133 priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++); 134 if (priv->txq[i]->irq_no <= 0) { 135 dev_err(dev, "sxgbe tx irq parsing failed\n"); 136 goto err_tx_irq_unmap; 137 } 138 } 139 140 for (i = 0; i < SXGBE_RX_QUEUES; i++) { 141 priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++); 142 if (priv->rxq[i]->irq_no <= 0) { 143 dev_err(dev, "sxgbe rx irq parsing failed\n"); 144 goto err_rx_irq_unmap; 145 } 146 } 147 148 priv->lpi_irq = irq_of_parse_and_map(node, chan); 149 if (priv->lpi_irq <= 0) { 150 dev_err(dev, "sxgbe lpi irq parsing failed\n"); 151 goto err_rx_irq_unmap; 152 } 153 154 platform_set_drvdata(pdev, priv->dev); 155 156 pr_debug("platform driver registration completed\n"); 157 158 return 0; 159 160err_rx_irq_unmap: 161 while (--i) 162 irq_dispose_mapping(priv->rxq[i]->irq_no); 163 i = SXGBE_TX_QUEUES; 164err_tx_irq_unmap: 165 while (--i) 166 irq_dispose_mapping(priv->txq[i]->irq_no); 167 irq_dispose_mapping(priv->irq); 168err_drv_remove: 169 sxgbe_drv_remove(ndev); 170err_out: 171 return -ENODEV; 172} 173 174/** 175 * sxgbe_platform_remove 176 * @pdev: platform device pointer 177 * Description: this function calls the main to free the net resources 178 * and calls the platforms hook and release the resources (e.g. mem). 179 */ 180static int sxgbe_platform_remove(struct platform_device *pdev) 181{ 182 struct net_device *ndev = platform_get_drvdata(pdev); 183 int ret = sxgbe_drv_remove(ndev); 184 185 return ret; 186} 187 188#ifdef CONFIG_PM 189static int sxgbe_platform_suspend(struct device *dev) 190{ 191 struct net_device *ndev = dev_get_drvdata(dev); 192 193 return sxgbe_suspend(ndev); 194} 195 196static int sxgbe_platform_resume(struct device *dev) 197{ 198 struct net_device *ndev = dev_get_drvdata(dev); 199 200 return sxgbe_resume(ndev); 201} 202 203static int sxgbe_platform_freeze(struct device *dev) 204{ 205 struct net_device *ndev = dev_get_drvdata(dev); 206 207 return sxgbe_freeze(ndev); 208} 209 210static int sxgbe_platform_restore(struct device *dev) 211{ 212 struct net_device *ndev = dev_get_drvdata(dev); 213 214 return sxgbe_restore(ndev); 215} 216 217static const struct dev_pm_ops sxgbe_platform_pm_ops = { 218 .suspend = sxgbe_platform_suspend, 219 .resume = sxgbe_platform_resume, 220 .freeze = sxgbe_platform_freeze, 221 .thaw = sxgbe_platform_restore, 222 .restore = sxgbe_platform_restore, 223}; 224#else 225static const struct dev_pm_ops sxgbe_platform_pm_ops; 226#endif /* CONFIG_PM */ 227 228static const struct of_device_id sxgbe_dt_ids[] = { 229 { .compatible = "samsung,sxgbe-v2.0a"}, 230 { /* sentinel */ } 231}; 232MODULE_DEVICE_TABLE(of, sxgbe_dt_ids); 233 234static struct platform_driver sxgbe_platform_driver = { 235 .probe = sxgbe_platform_probe, 236 .remove = sxgbe_platform_remove, 237 .driver = { 238 .name = SXGBE_RESOURCE_NAME, 239 .owner = THIS_MODULE, 240 .pm = &sxgbe_platform_pm_ops, 241 .of_match_table = of_match_ptr(sxgbe_dt_ids), 242 }, 243}; 244 245int sxgbe_register_platform(void) 246{ 247 int err; 248 249 err = platform_driver_register(&sxgbe_platform_driver); 250 if (err) 251 pr_err("failed to register the platform driver\n"); 252 253 return err; 254} 255 256void sxgbe_unregister_platform(void) 257{ 258 platform_driver_unregister(&sxgbe_platform_driver); 259} 260