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Linux/drivers/net/ethernet/samsung/sxgbe/sxgbe_platform.c

  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);
 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 
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 
124         /* Get MAC address if available (DT) */
125         if (mac)
126                 ether_addr_copy(priv->dev->dev_addr, mac);
127 
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 
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 
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 
200 static int sxgbe_platform_freeze(struct device *dev)
201 {
202         struct net_device *ndev = dev_get_drvdata(dev);
203 
204         return sxgbe_freeze(ndev);
205 }
206 
207 static int sxgbe_platform_restore(struct device *dev)
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 
231 static struct platform_driver sxgbe_platform_driver = {
232         .probe  = sxgbe_platform_probe,
233         .remove = sxgbe_platform_remove,
234         .driver = {
235                 .name           = SXGBE_RESOURCE_NAME,
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 }
256 

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