Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 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 |
| 30 | static 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 |
| 63 | static 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 | */ |
| 78 | static 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); |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 93 | addr = devm_ioremap_resource(dev, res); |
| 94 | if (IS_ERR(addr)) |
| 95 | return PTR_ERR(addr); |
| 96 | |
| 97 | if (pdev->dev.of_node) { |
| 98 | plat_dat = devm_kzalloc(&pdev->dev, |
| 99 | sizeof(struct sxgbe_plat_data), |
| 100 | GFP_KERNEL); |
| 101 | if (!plat_dat) |
| 102 | return -ENOMEM; |
| 103 | |
| 104 | ret = sxgbe_probe_config_dt(pdev, plat_dat, &mac); |
| 105 | if (ret) { |
| 106 | pr_err("%s: main dt probe failed\n", __func__); |
| 107 | return ret; |
| 108 | } |
| 109 | } |
| 110 | |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 111 | priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr); |
| 112 | if (!priv) { |
| 113 | pr_err("%s: main driver probe failed\n", __func__); |
| 114 | goto err_out; |
| 115 | } |
| 116 | |
| 117 | /* Get the SXGBE common INT information */ |
| 118 | priv->irq = irq_of_parse_and_map(node, 0); |
| 119 | if (priv->irq <= 0) { |
| 120 | dev_err(dev, "sxgbe common irq parsing failed\n"); |
| 121 | goto err_drv_remove; |
| 122 | } |
| 123 | |
Girish K.S | 1c1832c | 2015-01-15 10:41:47 +0900 | [diff] [blame] | 124 | /* Get MAC address if available (DT) */ |
| 125 | if (mac) |
| 126 | ether_addr_copy(priv->dev->dev_addr, mac); |
| 127 | |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 128 | /* Get the TX/RX IRQ numbers */ |
| 129 | for (i = 0, chan = 1; i < SXGBE_TX_QUEUES; i++) { |
| 130 | priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++); |
| 131 | if (priv->txq[i]->irq_no <= 0) { |
| 132 | dev_err(dev, "sxgbe tx irq parsing failed\n"); |
| 133 | goto err_tx_irq_unmap; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | for (i = 0; i < SXGBE_RX_QUEUES; i++) { |
| 138 | priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++); |
| 139 | if (priv->rxq[i]->irq_no <= 0) { |
| 140 | dev_err(dev, "sxgbe rx irq parsing failed\n"); |
| 141 | goto err_rx_irq_unmap; |
| 142 | } |
| 143 | } |
| 144 | |
Girish K S | acc18c1 | 2014-03-25 12:10:57 -0700 | [diff] [blame] | 145 | priv->lpi_irq = irq_of_parse_and_map(node, chan); |
| 146 | if (priv->lpi_irq <= 0) { |
| 147 | dev_err(dev, "sxgbe lpi irq parsing failed\n"); |
| 148 | goto err_rx_irq_unmap; |
| 149 | } |
| 150 | |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 151 | platform_set_drvdata(pdev, priv->dev); |
| 152 | |
| 153 | pr_debug("platform driver registration completed\n"); |
| 154 | |
| 155 | return 0; |
| 156 | |
| 157 | err_rx_irq_unmap: |
| 158 | while (--i) |
| 159 | irq_dispose_mapping(priv->rxq[i]->irq_no); |
| 160 | i = SXGBE_TX_QUEUES; |
| 161 | err_tx_irq_unmap: |
| 162 | while (--i) |
| 163 | irq_dispose_mapping(priv->txq[i]->irq_no); |
| 164 | irq_dispose_mapping(priv->irq); |
| 165 | err_drv_remove: |
| 166 | sxgbe_drv_remove(ndev); |
| 167 | err_out: |
| 168 | return -ENODEV; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * sxgbe_platform_remove |
| 173 | * @pdev: platform device pointer |
| 174 | * Description: this function calls the main to free the net resources |
| 175 | * and calls the platforms hook and release the resources (e.g. mem). |
| 176 | */ |
| 177 | static int sxgbe_platform_remove(struct platform_device *pdev) |
| 178 | { |
| 179 | struct net_device *ndev = platform_get_drvdata(pdev); |
| 180 | int ret = sxgbe_drv_remove(ndev); |
| 181 | |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | #ifdef CONFIG_PM |
| 186 | static int sxgbe_platform_suspend(struct device *dev) |
| 187 | { |
| 188 | struct net_device *ndev = dev_get_drvdata(dev); |
| 189 | |
| 190 | return sxgbe_suspend(ndev); |
| 191 | } |
| 192 | |
| 193 | static int sxgbe_platform_resume(struct device *dev) |
| 194 | { |
| 195 | struct net_device *ndev = dev_get_drvdata(dev); |
| 196 | |
| 197 | return sxgbe_resume(ndev); |
| 198 | } |
| 199 | |
Byungho An | 40b92ca | 2014-03-28 10:57:36 -0700 | [diff] [blame] | 200 | static int sxgbe_platform_freeze(struct device *dev) |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 201 | { |
| 202 | struct net_device *ndev = dev_get_drvdata(dev); |
| 203 | |
| 204 | return sxgbe_freeze(ndev); |
| 205 | } |
| 206 | |
Byungho An | 40b92ca | 2014-03-28 10:57:36 -0700 | [diff] [blame] | 207 | static int sxgbe_platform_restore(struct device *dev) |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 208 | { |
| 209 | struct net_device *ndev = dev_get_drvdata(dev); |
| 210 | |
| 211 | return sxgbe_restore(ndev); |
| 212 | } |
| 213 | |
| 214 | static const struct dev_pm_ops sxgbe_platform_pm_ops = { |
| 215 | .suspend = sxgbe_platform_suspend, |
| 216 | .resume = sxgbe_platform_resume, |
| 217 | .freeze = sxgbe_platform_freeze, |
| 218 | .thaw = sxgbe_platform_restore, |
| 219 | .restore = sxgbe_platform_restore, |
| 220 | }; |
| 221 | #else |
| 222 | static const struct dev_pm_ops sxgbe_platform_pm_ops; |
| 223 | #endif /* CONFIG_PM */ |
| 224 | |
| 225 | static const struct of_device_id sxgbe_dt_ids[] = { |
| 226 | { .compatible = "samsung,sxgbe-v2.0a"}, |
| 227 | { /* sentinel */ } |
| 228 | }; |
| 229 | MODULE_DEVICE_TABLE(of, sxgbe_dt_ids); |
| 230 | |
Byungho An | 40b92ca | 2014-03-28 10:57:36 -0700 | [diff] [blame] | 231 | static struct platform_driver sxgbe_platform_driver = { |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 232 | .probe = sxgbe_platform_probe, |
| 233 | .remove = sxgbe_platform_remove, |
| 234 | .driver = { |
| 235 | .name = SXGBE_RESOURCE_NAME, |
Siva Reddy | 1edb9ca | 2014-03-25 12:10:54 -0700 | [diff] [blame] | 236 | .pm = &sxgbe_platform_pm_ops, |
| 237 | .of_match_table = of_match_ptr(sxgbe_dt_ids), |
| 238 | }, |
| 239 | }; |
| 240 | |
| 241 | int sxgbe_register_platform(void) |
| 242 | { |
| 243 | int err; |
| 244 | |
| 245 | err = platform_driver_register(&sxgbe_platform_driver); |
| 246 | if (err) |
| 247 | pr_err("failed to register the platform driver\n"); |
| 248 | |
| 249 | return err; |
| 250 | } |
| 251 | |
| 252 | void sxgbe_unregister_platform(void) |
| 253 | { |
| 254 | platform_driver_unregister(&sxgbe_platform_driver); |
| 255 | } |