x86/speculation: Fix redundant MDS mitigation message
[linux-2.6-block.git] / drivers / net / ethernet / samsung / sxgbe / sxgbe_platform.c
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 }