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>
26 #include <linux/module.h>
29 #include <linux/of_net.h>
30 #include <linux/of_device.h>
31 #include <linux/of_mdio.h>
34 #include "stmmac_platform.h"
39 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
40 * @mcast_bins: Multicast filtering bins
42 * this function validates the number of Multicast filtering bins specified
43 * by the configuration through the device tree. The Synopsys GMAC supports
44 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
45 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
46 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
47 * invalid and will cause the filtering algorithm to use Multicast
50 static int dwmac1000_validate_mcast_bins(int mcast_bins)
61 pr_info("Hash table entries set to unexpected value %d",
69 * dwmac1000_validate_ucast_entries - validate the Unicast address entries
70 * @ucast_entries: number of Unicast address entries
72 * This function validates the number of Unicast address entries supported
73 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
74 * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
75 * logic. This function validates a valid, supported configuration is
76 * selected, and defaults to 1 Unicast address if an unsupported
77 * configuration is selected.
79 static int dwmac1000_validate_ucast_entries(int ucast_entries)
81 int x = ucast_entries;
91 pr_info("Unicast table entries set to unexpected value %d\n",
99 * stmmac_axi_setup - parse DT parameters for programming the AXI register
100 * @pdev: platform device
101 * @priv: driver private struct.
103 * if required, from device-tree the AXI internal register can be tuned
104 * by using platform parameters.
106 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
108 struct device_node *np;
109 struct stmmac_axi *axi;
111 np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
115 axi = kzalloc(sizeof(*axi), GFP_KERNEL);
117 return ERR_PTR(-ENOMEM);
119 axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
120 axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
121 axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
122 axi->axi_axi_all = of_property_read_bool(np, "snps,axi_all");
123 axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
124 axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
125 axi->axi_rb = of_property_read_bool(np, "snps,axi_rb");
127 of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt);
128 of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt);
129 of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
135 * stmmac_probe_config_dt - parse device-tree driver parameters
136 * @pdev: platform_device structure
137 * @plat: driver data platform structure
138 * @mac: MAC address to use
140 * this function is to read the driver parameters from device-tree and
141 * set some private fields that will be used by the main at runtime.
143 struct plat_stmmacenet_data *
144 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
146 struct device_node *np = pdev->dev.of_node;
147 struct plat_stmmacenet_data *plat;
148 struct stmmac_dma_cfg *dma_cfg;
149 struct device_node *child_node = NULL;
151 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
153 return ERR_PTR(-ENOMEM);
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 /* If we find a phy-handle property, use it as the PHY */
170 plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
172 /* If phy-handle is not specified, check if we have a fixed-phy */
173 if (!plat->phy_node && of_phy_is_fixed_link(np)) {
174 if ((of_phy_register_fixed_link(np) < 0))
175 return ERR_PTR(-ENODEV);
177 plat->phy_node = of_node_get(np);
180 for_each_child_of_node(np, child_node)
181 if (of_device_is_compatible(child_node, "snps,dwmac-mdio")) {
182 plat->mdio_node = child_node;
186 /* "snps,phy-addr" is not a standard property. Mark it as deprecated
187 * and warn of its use. Remove this when phy node support is added.
189 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
190 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
192 if ((plat->phy_node && !of_phy_is_fixed_link(np)) || !plat->mdio_node)
193 plat->mdio_bus_data = NULL;
195 plat->mdio_bus_data =
196 devm_kzalloc(&pdev->dev,
197 sizeof(struct stmmac_mdio_bus_data),
200 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
202 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
204 plat->force_sf_dma_mode =
205 of_property_read_bool(np, "snps,force_sf_dma_mode");
207 /* Set the maxmtu to a default of JUMBO_LEN in case the
208 * parameter is not present in the device tree.
210 plat->maxmtu = JUMBO_LEN;
212 /* Set default value for multicast hash bins */
213 plat->multicast_filter_bins = HASH_TABLE_SIZE;
215 /* Set default value for unicast filter entries */
216 plat->unicast_filter_entries = 1;
219 * Currently only the properties needed on SPEAr600
220 * are provided. All other properties should be added
221 * once needed on other platforms.
223 if (of_device_is_compatible(np, "st,spear600-gmac") ||
224 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
225 of_device_is_compatible(np, "snps,dwmac")) {
226 /* Note that the max-frame-size parameter as defined in the
227 * ePAPR v1.1 spec is defined as max-frame-size, it's
228 * actually used as the IEEE definition of MAC Client
229 * data, or MTU. The ePAPR specification is confusing as
230 * the definition is max-frame-size, but usage examples
233 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
234 of_property_read_u32(np, "snps,multicast-filter-bins",
235 &plat->multicast_filter_bins);
236 of_property_read_u32(np, "snps,perfect-filter-entries",
237 &plat->unicast_filter_entries);
238 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
239 plat->unicast_filter_entries);
240 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
241 plat->multicast_filter_bins);
246 if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
247 of_device_is_compatible(np, "snps,dwmac-3.710")) {
249 plat->bugged_jumbo = 1;
250 plat->force_sf_dma_mode = 1;
253 if (of_find_property(np, "snps,pbl", NULL)) {
254 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
258 return ERR_PTR(-ENOMEM);
260 plat->dma_cfg = dma_cfg;
261 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
262 dma_cfg->aal = of_property_read_bool(np, "snps,aal");
263 dma_cfg->fixed_burst =
264 of_property_read_bool(np, "snps,fixed-burst");
265 dma_cfg->mixed_burst =
266 of_property_read_bool(np, "snps,mixed-burst");
268 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
269 if (plat->force_thresh_dma_mode) {
270 plat->force_sf_dma_mode = 0;
271 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
274 plat->axi = stmmac_axi_setup(pdev);
279 struct plat_stmmacenet_data *
280 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
282 return ERR_PTR(-ENOSYS);
284 #endif /* CONFIG_OF */
285 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
287 int stmmac_get_platform_resources(struct platform_device *pdev,
288 struct stmmac_resources *stmmac_res)
290 struct resource *res;
292 memset(stmmac_res, 0, sizeof(*stmmac_res));
294 /* Get IRQ information early to have an ability to ask for deferred
295 * probe if needed before we went too far with resource allocation.
297 stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
298 if (stmmac_res->irq < 0) {
299 if (stmmac_res->irq != -EPROBE_DEFER) {
301 "MAC IRQ configuration information not found\n");
303 return stmmac_res->irq;
306 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
307 * The external wake up irq can be passed through the platform code
308 * named as "eth_wake_irq"
310 * In case the wake up interrupt is not passed from the platform
311 * so the driver will continue to use the mac irq (ndev->irq)
313 stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
314 if (stmmac_res->wol_irq < 0) {
315 if (stmmac_res->wol_irq == -EPROBE_DEFER)
316 return -EPROBE_DEFER;
317 stmmac_res->wol_irq = stmmac_res->irq;
320 stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
321 if (stmmac_res->lpi_irq == -EPROBE_DEFER)
322 return -EPROBE_DEFER;
324 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
325 stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
327 return PTR_ERR_OR_ZERO(stmmac_res->addr);
329 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
332 * stmmac_pltfr_remove
333 * @pdev: platform device pointer
334 * Description: this function calls the main to free the net resources
335 * and calls the platforms hook and release the resources (e.g. mem).
337 int stmmac_pltfr_remove(struct platform_device *pdev)
339 struct net_device *ndev = platform_get_drvdata(pdev);
340 struct stmmac_priv *priv = netdev_priv(ndev);
341 int ret = stmmac_dvr_remove(ndev);
343 if (priv->plat->exit)
344 priv->plat->exit(pdev, priv->plat->bsp_priv);
348 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
350 #ifdef CONFIG_PM_SLEEP
352 * stmmac_pltfr_suspend
353 * @dev: device pointer
354 * Description: this function is invoked when suspend the driver and it direcly
355 * call the main suspend function and then, if required, on some platform, it
356 * can call an exit helper.
358 static int stmmac_pltfr_suspend(struct device *dev)
361 struct net_device *ndev = dev_get_drvdata(dev);
362 struct stmmac_priv *priv = netdev_priv(ndev);
363 struct platform_device *pdev = to_platform_device(dev);
365 ret = stmmac_suspend(ndev);
366 if (priv->plat->exit)
367 priv->plat->exit(pdev, priv->plat->bsp_priv);
373 * stmmac_pltfr_resume
374 * @dev: device pointer
375 * Description: this function is invoked when resume the driver before calling
376 * the main resume function, on some platforms, it can call own init helper
379 static int stmmac_pltfr_resume(struct device *dev)
381 struct net_device *ndev = dev_get_drvdata(dev);
382 struct stmmac_priv *priv = netdev_priv(ndev);
383 struct platform_device *pdev = to_platform_device(dev);
385 if (priv->plat->init)
386 priv->plat->init(pdev, priv->plat->bsp_priv);
388 return stmmac_resume(ndev);
390 #endif /* CONFIG_PM_SLEEP */
392 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
393 stmmac_pltfr_resume);
394 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
396 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
397 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
398 MODULE_LICENSE("GPL");