1 /*******************************************************************************
2 This contains the functions to handle the platform driver.
4 Copyright (C) 2007-2011 STMicroelectronics Ltd
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.
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
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.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
22 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
23 *******************************************************************************/
25 #include <linux/platform_device.h>
28 #include <linux/of_net.h>
29 #include <linux/of_device.h>
32 #include "stmmac_platform.h"
34 static const struct of_device_id stmmac_dt_ids[] = {
35 /* SoC specific glue layers should come before generic bindings */
36 { .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
37 { .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
38 { .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
39 { .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
40 { .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},
41 { .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
42 { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },
43 { .compatible = "st,spear600-gmac"},
44 { .compatible = "snps,dwmac-3.610"},
45 { .compatible = "snps,dwmac-3.70a"},
46 { .compatible = "snps,dwmac-3.710"},
47 { .compatible = "snps,dwmac"},
50 MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
55 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
56 * @mcast_bins: Multicast filtering bins
58 * this function validates the number of Multicast filtering bins specified
59 * by the configuration through the device tree. The Synopsys GMAC supports
60 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
61 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
62 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
63 * invalid and will cause the filtering algorithm to use Multicast
66 static int dwmac1000_validate_mcast_bins(int mcast_bins)
77 pr_info("Hash table entries set to unexpected value %d",
85 * dwmac1000_validate_ucast_entries - validate the Unicast address entries
86 * @ucast_entries: number of Unicast address entries
88 * This function validates the number of Unicast address entries supported
89 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
90 * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
91 * logic. This function validates a valid, supported configuration is
92 * selected, and defaults to 1 Unicast address if an unsupported
93 * configuration is selected.
95 static int dwmac1000_validate_ucast_entries(int ucast_entries)
97 int x = ucast_entries;
107 pr_info("Unicast table entries set to unexpected value %d\n",
115 * stmmac_probe_config_dt - parse device-tree driver parameters
116 * @pdev: platform_device structure
117 * @plat: driver data platform structure
118 * @mac: MAC address to use
120 * this function is to read the driver parameters from device-tree and
121 * set some private fields that will be used by the main at runtime.
123 static int stmmac_probe_config_dt(struct platform_device *pdev,
124 struct plat_stmmacenet_data *plat,
127 struct device_node *np = pdev->dev.of_node;
128 struct stmmac_dma_cfg *dma_cfg;
129 const struct of_device_id *device;
134 device = of_match_device(stmmac_dt_ids, &pdev->dev);
139 const struct stmmac_of_data *data = device->data;
140 plat->has_gmac = data->has_gmac;
141 plat->enh_desc = data->enh_desc;
142 plat->tx_coe = data->tx_coe;
143 plat->rx_coe = data->rx_coe;
144 plat->bugged_jumbo = data->bugged_jumbo;
145 plat->pmt = data->pmt;
146 plat->riwt_off = data->riwt_off;
147 plat->fix_mac_speed = data->fix_mac_speed;
148 plat->bus_setup = data->bus_setup;
149 plat->setup = data->setup;
150 plat->free = data->free;
151 plat->init = data->init;
152 plat->exit = data->exit;
155 *mac = of_get_mac_address(np);
156 plat->interface = of_get_phy_mode(np);
158 /* Get max speed of operation from device tree */
159 if (of_property_read_u32(np, "max-speed", &plat->max_speed))
160 plat->max_speed = -1;
162 plat->bus_id = of_alias_get_id(np, "ethernet");
163 if (plat->bus_id < 0)
166 /* Default to phy auto-detection */
169 /* "snps,phy-addr" is not a standard property. Mark it as deprecated
170 * and warn of its use. Remove this when phy node support is added.
172 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
173 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
175 if (plat->phy_bus_name)
176 plat->mdio_bus_data = NULL;
178 plat->mdio_bus_data =
179 devm_kzalloc(&pdev->dev,
180 sizeof(struct stmmac_mdio_bus_data),
183 plat->force_sf_dma_mode =
184 of_property_read_bool(np, "snps,force_sf_dma_mode");
186 /* Set the maxmtu to a default of JUMBO_LEN in case the
187 * parameter is not present in the device tree.
189 plat->maxmtu = JUMBO_LEN;
191 /* Set default value for multicast hash bins */
192 plat->multicast_filter_bins = HASH_TABLE_SIZE;
194 /* Set default value for unicast filter entries */
195 plat->unicast_filter_entries = 1;
198 * Currently only the properties needed on SPEAr600
199 * are provided. All other properties should be added
200 * once needed on other platforms.
202 if (of_device_is_compatible(np, "st,spear600-gmac") ||
203 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
204 of_device_is_compatible(np, "snps,dwmac")) {
205 /* Note that the max-frame-size parameter as defined in the
206 * ePAPR v1.1 spec is defined as max-frame-size, it's
207 * actually used as the IEEE definition of MAC Client
208 * data, or MTU. The ePAPR specification is confusing as
209 * the definition is max-frame-size, but usage examples
212 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
213 of_property_read_u32(np, "snps,multicast-filter-bins",
214 &plat->multicast_filter_bins);
215 of_property_read_u32(np, "snps,perfect-filter-entries",
216 &plat->unicast_filter_entries);
217 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
218 plat->unicast_filter_entries);
219 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
220 plat->multicast_filter_bins);
225 if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
226 of_device_is_compatible(np, "snps,dwmac-3.710")) {
228 plat->bugged_jumbo = 1;
229 plat->force_sf_dma_mode = 1;
232 if (of_find_property(np, "snps,pbl", NULL)) {
233 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
237 plat->dma_cfg = dma_cfg;
238 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
239 dma_cfg->fixed_burst =
240 of_property_read_bool(np, "snps,fixed-burst");
241 dma_cfg->mixed_burst =
242 of_property_read_bool(np, "snps,mixed-burst");
244 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
245 if (plat->force_thresh_dma_mode) {
246 plat->force_sf_dma_mode = 0;
247 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
253 static int stmmac_probe_config_dt(struct platform_device *pdev,
254 struct plat_stmmacenet_data *plat,
259 #endif /* CONFIG_OF */
262 * stmmac_pltfr_probe - platform driver probe.
263 * @pdev: platform device pointer
264 * Description: platform_device probe function. It is to allocate
265 * the necessary platform resources, invoke custom helper (if required) and
266 * invoke the main probe function.
268 static int stmmac_pltfr_probe(struct platform_device *pdev)
271 struct resource *res;
272 struct device *dev = &pdev->dev;
273 void __iomem *addr = NULL;
274 struct stmmac_priv *priv = NULL;
275 struct plat_stmmacenet_data *plat_dat = NULL;
276 const char *mac = NULL;
278 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
279 addr = devm_ioremap_resource(dev, res);
281 return PTR_ERR(addr);
283 plat_dat = dev_get_platdata(&pdev->dev);
284 if (pdev->dev.of_node) {
286 plat_dat = devm_kzalloc(&pdev->dev,
287 sizeof(struct plat_stmmacenet_data),
290 pr_err("%s: ERROR: no memory", __func__);
294 ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
296 pr_err("%s: main dt probe failed", __func__);
301 /* Custom setup (if needed) */
302 if (plat_dat->setup) {
303 plat_dat->bsp_priv = plat_dat->setup(pdev);
304 if (IS_ERR(plat_dat->bsp_priv))
305 return PTR_ERR(plat_dat->bsp_priv);
308 /* Custom initialisation (if needed)*/
309 if (plat_dat->init) {
310 ret = plat_dat->init(pdev, plat_dat->bsp_priv);
315 priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
317 pr_err("%s: main driver probe failed", __func__);
318 return PTR_ERR(priv);
321 /* Get MAC address if available (DT) */
323 memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
325 /* Get the MAC information */
326 priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
327 if (priv->dev->irq < 0) {
328 if (priv->dev->irq != -EPROBE_DEFER) {
329 netdev_err(priv->dev,
330 "MAC IRQ configuration information not found\n");
332 return priv->dev->irq;
336 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
337 * The external wake up irq can be passed through the platform code
338 * named as "eth_wake_irq"
340 * In case the wake up interrupt is not passed from the platform
341 * so the driver will continue to use the mac irq (ndev->irq)
343 priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
344 if (priv->wol_irq < 0) {
345 if (priv->wol_irq == -EPROBE_DEFER)
346 return -EPROBE_DEFER;
347 priv->wol_irq = priv->dev->irq;
350 priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
351 if (priv->lpi_irq == -EPROBE_DEFER)
352 return -EPROBE_DEFER;
354 platform_set_drvdata(pdev, priv->dev);
356 pr_debug("STMMAC platform driver registration completed");
362 * stmmac_pltfr_remove
363 * @pdev: platform device pointer
364 * Description: this function calls the main to free the net resources
365 * and calls the platforms hook and release the resources (e.g. mem).
367 static int stmmac_pltfr_remove(struct platform_device *pdev)
369 struct net_device *ndev = platform_get_drvdata(pdev);
370 struct stmmac_priv *priv = netdev_priv(ndev);
371 int ret = stmmac_dvr_remove(ndev);
373 if (priv->plat->exit)
374 priv->plat->exit(pdev, priv->plat->bsp_priv);
376 if (priv->plat->free)
377 priv->plat->free(pdev, priv->plat->bsp_priv);
382 #ifdef CONFIG_PM_SLEEP
384 * stmmac_pltfr_suspend
385 * @dev: device pointer
386 * Description: this function is invoked when suspend the driver and it direcly
387 * call the main suspend function and then, if required, on some platform, it
388 * can call an exit helper.
390 static int stmmac_pltfr_suspend(struct device *dev)
393 struct net_device *ndev = dev_get_drvdata(dev);
394 struct stmmac_priv *priv = netdev_priv(ndev);
395 struct platform_device *pdev = to_platform_device(dev);
397 ret = stmmac_suspend(ndev);
398 if (priv->plat->exit)
399 priv->plat->exit(pdev, priv->plat->bsp_priv);
405 * stmmac_pltfr_resume
406 * @dev: device pointer
407 * Description: this function is invoked when resume the driver before calling
408 * the main resume function, on some platforms, it can call own init helper
411 static int stmmac_pltfr_resume(struct device *dev)
413 struct net_device *ndev = dev_get_drvdata(dev);
414 struct stmmac_priv *priv = netdev_priv(ndev);
415 struct platform_device *pdev = to_platform_device(dev);
417 if (priv->plat->init)
418 priv->plat->init(pdev, priv->plat->bsp_priv);
420 return stmmac_resume(ndev);
422 #endif /* CONFIG_PM_SLEEP */
424 static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
425 stmmac_pltfr_suspend, stmmac_pltfr_resume);
427 static struct platform_driver stmmac_pltfr_driver = {
428 .probe = stmmac_pltfr_probe,
429 .remove = stmmac_pltfr_remove,
431 .name = STMMAC_RESOURCE_NAME,
432 .owner = THIS_MODULE,
433 .pm = &stmmac_pltfr_pm_ops,
434 .of_match_table = of_match_ptr(stmmac_dt_ids),
438 module_platform_driver(stmmac_pltfr_driver);
440 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
441 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
442 MODULE_LICENSE("GPL");