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Linux/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

  1 /*******************************************************************************
  2   This contains the functions to handle the platform driver.
  3 
  4   Copyright (C) 2007-2011  STMicroelectronics Ltd
  5 
  6   This program is free software; you can redistribute it and/or modify it
  7   under the terms and conditions of the GNU General Public License,
  8   version 2, as published by the Free Software Foundation.
  9 
 10   This program is distributed in the hope it will be useful, but WITHOUT
 11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 13   more details.
 14 
 15   You should have received a copy of the GNU General Public License along with
 16   this program; if not, write to the Free Software Foundation, Inc.,
 17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 18 
 19   The full GNU General Public License is included in this distribution in
 20   the file called "COPYING".
 21 
 22   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
 23 *******************************************************************************/
 24 
 25 #include <linux/platform_device.h>
 26 #include <linux/io.h>
 27 #include <linux/of.h>
 28 #include <linux/of_net.h>
 29 #include <linux/of_device.h>
 30 #include "stmmac.h"
 31 
 32 static const struct of_device_id stmmac_dt_ids[] = {
 33 #ifdef CONFIG_DWMAC_SUNXI
 34         { .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
 35 #endif
 36 #ifdef CONFIG_DWMAC_STI
 37         { .compatible = "st,stih415-dwmac", .data = &sti_gmac_data},
 38         { .compatible = "st,stih416-dwmac", .data = &sti_gmac_data},
 39         { .compatible = "st,stid127-dwmac", .data = &sti_gmac_data},
 40 #endif
 41 #ifdef CONFIG_DWMAC_SOCFPGA
 42         { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },
 43 #endif
 44         /* SoC specific glue layers should come before generic bindings */
 45         { .compatible = "st,spear600-gmac"},
 46         { .compatible = "snps,dwmac-3.610"},
 47         { .compatible = "snps,dwmac-3.70a"},
 48         { .compatible = "snps,dwmac-3.710"},
 49         { .compatible = "snps,dwmac"},
 50         { /* sentinel */ }
 51 };
 52 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
 53 
 54 #ifdef CONFIG_OF
 55 static int stmmac_probe_config_dt(struct platform_device *pdev,
 56                                   struct plat_stmmacenet_data *plat,
 57                                   const char **mac)
 58 {
 59         struct device_node *np = pdev->dev.of_node;
 60         struct stmmac_dma_cfg *dma_cfg;
 61         const struct of_device_id *device;
 62 
 63         if (!np)
 64                 return -ENODEV;
 65 
 66         device = of_match_device(stmmac_dt_ids, &pdev->dev);
 67         if (!device)
 68                 return -ENODEV;
 69 
 70         if (device->data) {
 71                 const struct stmmac_of_data *data = device->data;
 72                 plat->has_gmac = data->has_gmac;
 73                 plat->enh_desc = data->enh_desc;
 74                 plat->tx_coe = data->tx_coe;
 75                 plat->rx_coe = data->rx_coe;
 76                 plat->bugged_jumbo = data->bugged_jumbo;
 77                 plat->pmt = data->pmt;
 78                 plat->riwt_off = data->riwt_off;
 79                 plat->fix_mac_speed = data->fix_mac_speed;
 80                 plat->bus_setup = data->bus_setup;
 81                 plat->setup = data->setup;
 82                 plat->free = data->free;
 83                 plat->init = data->init;
 84                 plat->exit = data->exit;
 85         }
 86 
 87         *mac = of_get_mac_address(np);
 88         plat->interface = of_get_phy_mode(np);
 89 
 90         /* Get max speed of operation from device tree */
 91         if (of_property_read_u32(np, "max-speed", &plat->max_speed))
 92                 plat->max_speed = -1;
 93 
 94         plat->bus_id = of_alias_get_id(np, "ethernet");
 95         if (plat->bus_id < 0)
 96                 plat->bus_id = 0;
 97 
 98         /* Default to phy auto-detection */
 99         plat->phy_addr = -1;
100 
101         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
102          * and warn of its use. Remove this when phy node support is added.
103          */
104         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
105                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
106 
107         plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
108                                            sizeof(struct stmmac_mdio_bus_data),
109                                            GFP_KERNEL);
110 
111         plat->force_sf_dma_mode = of_property_read_bool(np, "snps,force_sf_dma_mode");
112 
113         /* Set the maxmtu to a default of JUMBO_LEN in case the
114          * parameter is not present in the device tree.
115          */
116         plat->maxmtu = JUMBO_LEN;
117 
118         /*
119          * Currently only the properties needed on SPEAr600
120          * are provided. All other properties should be added
121          * once needed on other platforms.
122          */
123         if (of_device_is_compatible(np, "st,spear600-gmac") ||
124                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
125                 of_device_is_compatible(np, "snps,dwmac")) {
126                 /* Note that the max-frame-size parameter as defined in the
127                  * ePAPR v1.1 spec is defined as max-frame-size, it's
128                  * actually used as the IEEE definition of MAC Client
129                  * data, or MTU. The ePAPR specification is confusing as
130                  * the definition is max-frame-size, but usage examples
131                  * are clearly MTUs
132                  */
133                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
134                 plat->has_gmac = 1;
135                 plat->pmt = 1;
136         }
137 
138         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
139                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
140                 plat->enh_desc = 1;
141                 plat->bugged_jumbo = 1;
142                 plat->force_sf_dma_mode = 1;
143         }
144 
145         if (of_find_property(np, "snps,pbl", NULL)) {
146                 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
147                                        GFP_KERNEL);
148                 if (!dma_cfg)
149                         return -ENOMEM;
150                 plat->dma_cfg = dma_cfg;
151                 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
152                 dma_cfg->fixed_burst =
153                         of_property_read_bool(np, "snps,fixed-burst");
154                 dma_cfg->mixed_burst =
155                         of_property_read_bool(np, "snps,mixed-burst");
156         }
157         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
158         if (plat->force_thresh_dma_mode) {
159                 plat->force_sf_dma_mode = 0;
160                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
161         }
162 
163         return 0;
164 }
165 #else
166 static int stmmac_probe_config_dt(struct platform_device *pdev,
167                                   struct plat_stmmacenet_data *plat,
168                                   const char **mac)
169 {
170         return -ENOSYS;
171 }
172 #endif /* CONFIG_OF */
173 
174 /**
175  * stmmac_pltfr_probe
176  * @pdev: platform device pointer
177  * Description: platform_device probe function. It allocates
178  * the necessary resources and invokes the main to init
179  * the net device, register the mdio bus etc.
180  */
181 static int stmmac_pltfr_probe(struct platform_device *pdev)
182 {
183         int ret = 0;
184         struct resource *res;
185         struct device *dev = &pdev->dev;
186         void __iomem *addr = NULL;
187         struct stmmac_priv *priv = NULL;
188         struct plat_stmmacenet_data *plat_dat = NULL;
189         const char *mac = NULL;
190 
191         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
192         addr = devm_ioremap_resource(dev, res);
193         if (IS_ERR(addr))
194                 return PTR_ERR(addr);
195 
196         plat_dat = dev_get_platdata(&pdev->dev);
197         if (pdev->dev.of_node) {
198                 if (!plat_dat)
199                         plat_dat = devm_kzalloc(&pdev->dev,
200                                         sizeof(struct plat_stmmacenet_data),
201                                         GFP_KERNEL);
202                 if (!plat_dat) {
203                         pr_err("%s: ERROR: no memory", __func__);
204                         return  -ENOMEM;
205                 }
206 
207                 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
208                 if (ret) {
209                         pr_err("%s: main dt probe failed", __func__);
210                         return ret;
211                 }
212         }
213 
214         /* Custom setup (if needed) */
215         if (plat_dat->setup) {
216                 plat_dat->bsp_priv = plat_dat->setup(pdev);
217                 if (IS_ERR(plat_dat->bsp_priv))
218                         return PTR_ERR(plat_dat->bsp_priv);
219         }
220 
221         /* Custom initialisation (if needed)*/
222         if (plat_dat->init) {
223                 ret = plat_dat->init(pdev, plat_dat->bsp_priv);
224                 if (unlikely(ret))
225                         return ret;
226         }
227 
228         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
229         if (IS_ERR(priv)) {
230                 pr_err("%s: main driver probe failed", __func__);
231                 return PTR_ERR(priv);
232         }
233 
234         /* Get MAC address if available (DT) */
235         if (mac)
236                 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
237 
238         /* Get the MAC information */
239         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
240         if (priv->dev->irq < 0) {
241                 if (priv->dev->irq != -EPROBE_DEFER) {
242                         netdev_err(priv->dev,
243                                    "MAC IRQ configuration information not found\n");
244                 }
245                 return priv->dev->irq;
246         }
247 
248         /*
249          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
250          * The external wake up irq can be passed through the platform code
251          * named as "eth_wake_irq"
252          *
253          * In case the wake up interrupt is not passed from the platform
254          * so the driver will continue to use the mac irq (ndev->irq)
255          */
256         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
257         if (priv->wol_irq < 0) {
258                 if (priv->wol_irq == -EPROBE_DEFER)
259                         return -EPROBE_DEFER;
260                 priv->wol_irq = priv->dev->irq;
261         }
262 
263         priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
264         if (priv->lpi_irq == -EPROBE_DEFER)
265                 return -EPROBE_DEFER;
266 
267         platform_set_drvdata(pdev, priv->dev);
268 
269         pr_debug("STMMAC platform driver registration completed");
270 
271         return 0;
272 }
273 
274 /**
275  * stmmac_pltfr_remove
276  * @pdev: platform device pointer
277  * Description: this function calls the main to free the net resources
278  * and calls the platforms hook and release the resources (e.g. mem).
279  */
280 static int stmmac_pltfr_remove(struct platform_device *pdev)
281 {
282         struct net_device *ndev = platform_get_drvdata(pdev);
283         struct stmmac_priv *priv = netdev_priv(ndev);
284         int ret = stmmac_dvr_remove(ndev);
285 
286         if (priv->plat->exit)
287                 priv->plat->exit(pdev, priv->plat->bsp_priv);
288 
289         if (priv->plat->free)
290                 priv->plat->free(pdev, priv->plat->bsp_priv);
291 
292         return ret;
293 }
294 
295 #ifdef CONFIG_PM
296 static int stmmac_pltfr_suspend(struct device *dev)
297 {
298         int ret;
299         struct net_device *ndev = dev_get_drvdata(dev);
300         struct stmmac_priv *priv = netdev_priv(ndev);
301         struct platform_device *pdev = to_platform_device(dev);
302 
303         ret = stmmac_suspend(ndev);
304         if (priv->plat->exit)
305                 priv->plat->exit(pdev, priv->plat->bsp_priv);
306 
307         return ret;
308 }
309 
310 static int stmmac_pltfr_resume(struct device *dev)
311 {
312         struct net_device *ndev = dev_get_drvdata(dev);
313         struct stmmac_priv *priv = netdev_priv(ndev);
314         struct platform_device *pdev = to_platform_device(dev);
315 
316         if (priv->plat->init)
317                 priv->plat->init(pdev, priv->plat->bsp_priv);
318 
319         return stmmac_resume(ndev);
320 }
321 
322 #endif /* CONFIG_PM */
323 
324 static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
325                         stmmac_pltfr_suspend, stmmac_pltfr_resume);
326 
327 struct platform_driver stmmac_pltfr_driver = {
328         .probe = stmmac_pltfr_probe,
329         .remove = stmmac_pltfr_remove,
330         .driver = {
331                    .name = STMMAC_RESOURCE_NAME,
332                    .owner = THIS_MODULE,
333                    .pm = &stmmac_pltfr_pm_ops,
334                    .of_match_table = of_match_ptr(stmmac_dt_ids),
335                    },
336 };
337 
338 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
339 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
340 MODULE_LICENSE("GPL");
341 

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