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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_MESON
 34         { .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
 35 #endif
 36 #ifdef CONFIG_DWMAC_SUNXI
 37         { .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
 38 #endif
 39 #ifdef CONFIG_DWMAC_STI
 40         { .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
 41         { .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
 42         { .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},
 43         { .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
 44 #endif
 45 #ifdef CONFIG_DWMAC_SOCFPGA
 46         { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },
 47 #endif
 48         /* SoC specific glue layers should come before generic bindings */
 49         { .compatible = "st,spear600-gmac"},
 50         { .compatible = "snps,dwmac-3.610"},
 51         { .compatible = "snps,dwmac-3.70a"},
 52         { .compatible = "snps,dwmac-3.710"},
 53         { .compatible = "snps,dwmac"},
 54         { /* sentinel */ }
 55 };
 56 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
 57 
 58 #ifdef CONFIG_OF
 59 
 60 /* This function validates the number of Multicast filtering bins specified
 61  * by the configuration through the device tree. The Synopsys GMAC supports
 62  * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
 63  * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
 64  * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
 65  * invalid and will cause the filtering algorithm to use Multicast
 66  * promiscuous mode.
 67  */
 68 static int dwmac1000_validate_mcast_bins(int mcast_bins)
 69 {
 70         int x = mcast_bins;
 71 
 72         switch (x) {
 73         case HASH_TABLE_SIZE:
 74         case 128:
 75         case 256:
 76                 break;
 77         default:
 78                 x = 0;
 79                 pr_info("Hash table entries set to unexpected value %d",
 80                         mcast_bins);
 81                 break;
 82         }
 83         return x;
 84 }
 85 
 86 /* This function validates the number of Unicast address entries supported
 87  * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
 88  * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
 89  * logic. This function validates a valid, supported configuration is
 90  * selected, and defaults to 1 Unicast address if an unsupported
 91  * configuration is selected.
 92  */
 93 static int dwmac1000_validate_ucast_entries(int ucast_entries)
 94 {
 95         int x = ucast_entries;
 96 
 97         switch (x) {
 98         case 1:
 99         case 32:
100         case 64:
101         case 128:
102                 break;
103         default:
104                 x = 1;
105                 pr_info("Unicast table entries set to unexpected value %d\n",
106                         ucast_entries);
107                 break;
108         }
109         return x;
110 }
111 
112 static int stmmac_probe_config_dt(struct platform_device *pdev,
113                                   struct plat_stmmacenet_data *plat,
114                                   const char **mac)
115 {
116         struct device_node *np = pdev->dev.of_node;
117         struct stmmac_dma_cfg *dma_cfg;
118         const struct of_device_id *device;
119 
120         if (!np)
121                 return -ENODEV;
122 
123         device = of_match_device(stmmac_dt_ids, &pdev->dev);
124         if (!device)
125                 return -ENODEV;
126 
127         if (device->data) {
128                 const struct stmmac_of_data *data = device->data;
129                 plat->has_gmac = data->has_gmac;
130                 plat->enh_desc = data->enh_desc;
131                 plat->tx_coe = data->tx_coe;
132                 plat->rx_coe = data->rx_coe;
133                 plat->bugged_jumbo = data->bugged_jumbo;
134                 plat->pmt = data->pmt;
135                 plat->riwt_off = data->riwt_off;
136                 plat->fix_mac_speed = data->fix_mac_speed;
137                 plat->bus_setup = data->bus_setup;
138                 plat->setup = data->setup;
139                 plat->free = data->free;
140                 plat->init = data->init;
141                 plat->exit = data->exit;
142         }
143 
144         *mac = of_get_mac_address(np);
145         plat->interface = of_get_phy_mode(np);
146 
147         /* Get max speed of operation from device tree */
148         if (of_property_read_u32(np, "max-speed", &plat->max_speed))
149                 plat->max_speed = -1;
150 
151         plat->bus_id = of_alias_get_id(np, "ethernet");
152         if (plat->bus_id < 0)
153                 plat->bus_id = 0;
154 
155         /* Default to phy auto-detection */
156         plat->phy_addr = -1;
157 
158         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
159          * and warn of its use. Remove this when phy node support is added.
160          */
161         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
162                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
163 
164         if (plat->phy_bus_name)
165                 plat->mdio_bus_data = NULL;
166         else
167                 plat->mdio_bus_data =
168                         devm_kzalloc(&pdev->dev,
169                                      sizeof(struct stmmac_mdio_bus_data),
170                                      GFP_KERNEL);
171 
172         plat->force_sf_dma_mode =
173                 of_property_read_bool(np, "snps,force_sf_dma_mode");
174 
175         /* Set the maxmtu to a default of JUMBO_LEN in case the
176          * parameter is not present in the device tree.
177          */
178         plat->maxmtu = JUMBO_LEN;
179 
180         /*
181          * Currently only the properties needed on SPEAr600
182          * are provided. All other properties should be added
183          * once needed on other platforms.
184          */
185         if (of_device_is_compatible(np, "st,spear600-gmac") ||
186                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
187                 of_device_is_compatible(np, "snps,dwmac")) {
188                 /* Note that the max-frame-size parameter as defined in the
189                  * ePAPR v1.1 spec is defined as max-frame-size, it's
190                  * actually used as the IEEE definition of MAC Client
191                  * data, or MTU. The ePAPR specification is confusing as
192                  * the definition is max-frame-size, but usage examples
193                  * are clearly MTUs
194                  */
195                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
196                 of_property_read_u32(np, "snps,multicast-filter-bins",
197                                      &plat->multicast_filter_bins);
198                 of_property_read_u32(np, "snps,perfect-filter-entries",
199                                      &plat->unicast_filter_entries);
200                 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
201                                                plat->unicast_filter_entries);
202                 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
203                                               plat->multicast_filter_bins);
204                 plat->has_gmac = 1;
205                 plat->pmt = 1;
206         }
207 
208         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
209                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
210                 plat->enh_desc = 1;
211                 plat->bugged_jumbo = 1;
212                 plat->force_sf_dma_mode = 1;
213         }
214 
215         if (of_find_property(np, "snps,pbl", NULL)) {
216                 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
217                                        GFP_KERNEL);
218                 if (!dma_cfg)
219                         return -ENOMEM;
220                 plat->dma_cfg = dma_cfg;
221                 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
222                 dma_cfg->fixed_burst =
223                         of_property_read_bool(np, "snps,fixed-burst");
224                 dma_cfg->mixed_burst =
225                         of_property_read_bool(np, "snps,mixed-burst");
226         }
227         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
228         if (plat->force_thresh_dma_mode) {
229                 plat->force_sf_dma_mode = 0;
230                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
231         }
232 
233         return 0;
234 }
235 #else
236 static int stmmac_probe_config_dt(struct platform_device *pdev,
237                                   struct plat_stmmacenet_data *plat,
238                                   const char **mac)
239 {
240         return -ENOSYS;
241 }
242 #endif /* CONFIG_OF */
243 
244 /**
245  * stmmac_pltfr_probe
246  * @pdev: platform device pointer
247  * Description: platform_device probe function. It allocates
248  * the necessary resources and invokes the main to init
249  * the net device, register the mdio bus etc.
250  */
251 static int stmmac_pltfr_probe(struct platform_device *pdev)
252 {
253         int ret = 0;
254         struct resource *res;
255         struct device *dev = &pdev->dev;
256         void __iomem *addr = NULL;
257         struct stmmac_priv *priv = NULL;
258         struct plat_stmmacenet_data *plat_dat = NULL;
259         const char *mac = NULL;
260 
261         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
262         addr = devm_ioremap_resource(dev, res);
263         if (IS_ERR(addr))
264                 return PTR_ERR(addr);
265 
266         plat_dat = dev_get_platdata(&pdev->dev);
267 
268         if (!plat_dat)
269                 plat_dat = devm_kzalloc(&pdev->dev,
270                                         sizeof(struct plat_stmmacenet_data),
271                                         GFP_KERNEL);
272         if (!plat_dat) {
273                 pr_err("%s: ERROR: no memory", __func__);
274                 return  -ENOMEM;
275         }
276 
277         /* Set default value for multicast hash bins */
278         plat_dat->multicast_filter_bins = HASH_TABLE_SIZE;
279 
280         /* Set default value for unicast filter entries */
281         plat_dat->unicast_filter_entries = 1;
282 
283         if (pdev->dev.of_node) {
284                 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
285                 if (ret) {
286                         pr_err("%s: main dt probe failed", __func__);
287                         return ret;
288                 }
289         }
290 
291         /* Custom setup (if needed) */
292         if (plat_dat->setup) {
293                 plat_dat->bsp_priv = plat_dat->setup(pdev);
294                 if (IS_ERR(plat_dat->bsp_priv))
295                         return PTR_ERR(plat_dat->bsp_priv);
296         }
297 
298         /* Custom initialisation (if needed)*/
299         if (plat_dat->init) {
300                 ret = plat_dat->init(pdev, plat_dat->bsp_priv);
301                 if (unlikely(ret))
302                         return ret;
303         }
304 
305         priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
306         if (IS_ERR(priv)) {
307                 pr_err("%s: main driver probe failed", __func__);
308                 return PTR_ERR(priv);
309         }
310 
311         /* Get MAC address if available (DT) */
312         if (mac)
313                 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
314 
315         /* Get the MAC information */
316         priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
317         if (priv->dev->irq < 0) {
318                 if (priv->dev->irq != -EPROBE_DEFER) {
319                         netdev_err(priv->dev,
320                                    "MAC IRQ configuration information not found\n");
321                 }
322                 return priv->dev->irq;
323         }
324 
325         /*
326          * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
327          * The external wake up irq can be passed through the platform code
328          * named as "eth_wake_irq"
329          *
330          * In case the wake up interrupt is not passed from the platform
331          * so the driver will continue to use the mac irq (ndev->irq)
332          */
333         priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
334         if (priv->wol_irq < 0) {
335                 if (priv->wol_irq == -EPROBE_DEFER)
336                         return -EPROBE_DEFER;
337                 priv->wol_irq = priv->dev->irq;
338         }
339 
340         priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
341         if (priv->lpi_irq == -EPROBE_DEFER)
342                 return -EPROBE_DEFER;
343 
344         platform_set_drvdata(pdev, priv->dev);
345 
346         pr_debug("STMMAC platform driver registration completed");
347 
348         return 0;
349 }
350 
351 /**
352  * stmmac_pltfr_remove
353  * @pdev: platform device pointer
354  * Description: this function calls the main to free the net resources
355  * and calls the platforms hook and release the resources (e.g. mem).
356  */
357 static int stmmac_pltfr_remove(struct platform_device *pdev)
358 {
359         struct net_device *ndev = platform_get_drvdata(pdev);
360         struct stmmac_priv *priv = netdev_priv(ndev);
361         int ret = stmmac_dvr_remove(ndev);
362 
363         if (priv->plat->exit)
364                 priv->plat->exit(pdev, priv->plat->bsp_priv);
365 
366         if (priv->plat->free)
367                 priv->plat->free(pdev, priv->plat->bsp_priv);
368 
369         return ret;
370 }
371 
372 #ifdef CONFIG_PM
373 static int stmmac_pltfr_suspend(struct device *dev)
374 {
375         int ret;
376         struct net_device *ndev = dev_get_drvdata(dev);
377         struct stmmac_priv *priv = netdev_priv(ndev);
378         struct platform_device *pdev = to_platform_device(dev);
379 
380         ret = stmmac_suspend(ndev);
381         if (priv->plat->exit)
382                 priv->plat->exit(pdev, priv->plat->bsp_priv);
383 
384         return ret;
385 }
386 
387 static int stmmac_pltfr_resume(struct device *dev)
388 {
389         struct net_device *ndev = dev_get_drvdata(dev);
390         struct stmmac_priv *priv = netdev_priv(ndev);
391         struct platform_device *pdev = to_platform_device(dev);
392 
393         if (priv->plat->init)
394                 priv->plat->init(pdev, priv->plat->bsp_priv);
395 
396         return stmmac_resume(ndev);
397 }
398 
399 #endif /* CONFIG_PM */
400 
401 static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
402                         stmmac_pltfr_suspend, stmmac_pltfr_resume);
403 
404 struct platform_driver stmmac_pltfr_driver = {
405         .probe = stmmac_pltfr_probe,
406         .remove = stmmac_pltfr_remove,
407         .driver = {
408                    .name = STMMAC_RESOURCE_NAME,
409                    .owner = THIS_MODULE,
410                    .pm = &stmmac_pltfr_pm_ops,
411                    .of_match_table = of_match_ptr(stmmac_dt_ids),
412                    },
413 };
414 
415 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
416 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
417 MODULE_LICENSE("GPL");
418 

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