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_probe_config_dt - parse device-tree driver parameters
100 * @pdev: platform_device structure
101 * @plat: driver data platform structure
102 * @mac: MAC address to use
104 * this function is to read the driver parameters from device-tree and
105 * set some private fields that will be used by the main at runtime.
107 static struct plat_stmmacenet_data *
108 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
110 struct device_node *np = pdev->dev.of_node;
111 struct plat_stmmacenet_data *plat;
112 const struct stmmac_of_data *data;
113 struct stmmac_dma_cfg *dma_cfg;
115 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
117 return ERR_PTR(-ENOMEM);
119 data = of_device_get_match_data(&pdev->dev);
121 plat->has_gmac = data->has_gmac;
122 plat->enh_desc = data->enh_desc;
123 plat->tx_coe = data->tx_coe;
124 plat->rx_coe = data->rx_coe;
125 plat->bugged_jumbo = data->bugged_jumbo;
126 plat->pmt = data->pmt;
127 plat->riwt_off = data->riwt_off;
128 plat->fix_mac_speed = data->fix_mac_speed;
129 plat->bus_setup = data->bus_setup;
130 plat->setup = data->setup;
131 plat->free = data->free;
132 plat->init = data->init;
133 plat->exit = data->exit;
136 *mac = of_get_mac_address(np);
137 plat->interface = of_get_phy_mode(np);
139 /* Get max speed of operation from device tree */
140 if (of_property_read_u32(np, "max-speed", &plat->max_speed))
141 plat->max_speed = -1;
143 plat->bus_id = of_alias_get_id(np, "ethernet");
144 if (plat->bus_id < 0)
147 /* Default to phy auto-detection */
150 /* If we find a phy-handle property, use it as the PHY */
151 plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
153 /* If phy-handle is not specified, check if we have a fixed-phy */
154 if (!plat->phy_node && of_phy_is_fixed_link(np)) {
155 if ((of_phy_register_fixed_link(np) < 0))
156 return ERR_PTR(-ENODEV);
158 plat->phy_node = of_node_get(np);
161 /* "snps,phy-addr" is not a standard property. Mark it as deprecated
162 * and warn of its use. Remove this when phy node support is added.
164 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
165 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
167 if (plat->phy_node || plat->phy_bus_name)
168 plat->mdio_bus_data = NULL;
170 plat->mdio_bus_data =
171 devm_kzalloc(&pdev->dev,
172 sizeof(struct stmmac_mdio_bus_data),
175 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
177 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
179 plat->force_sf_dma_mode =
180 of_property_read_bool(np, "snps,force_sf_dma_mode");
182 /* Set the maxmtu to a default of JUMBO_LEN in case the
183 * parameter is not present in the device tree.
185 plat->maxmtu = JUMBO_LEN;
187 /* Set default value for multicast hash bins */
188 plat->multicast_filter_bins = HASH_TABLE_SIZE;
190 /* Set default value for unicast filter entries */
191 plat->unicast_filter_entries = 1;
194 * Currently only the properties needed on SPEAr600
195 * are provided. All other properties should be added
196 * once needed on other platforms.
198 if (of_device_is_compatible(np, "st,spear600-gmac") ||
199 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
200 of_device_is_compatible(np, "snps,dwmac")) {
201 /* Note that the max-frame-size parameter as defined in the
202 * ePAPR v1.1 spec is defined as max-frame-size, it's
203 * actually used as the IEEE definition of MAC Client
204 * data, or MTU. The ePAPR specification is confusing as
205 * the definition is max-frame-size, but usage examples
208 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
209 of_property_read_u32(np, "snps,multicast-filter-bins",
210 &plat->multicast_filter_bins);
211 of_property_read_u32(np, "snps,perfect-filter-entries",
212 &plat->unicast_filter_entries);
213 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
214 plat->unicast_filter_entries);
215 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
216 plat->multicast_filter_bins);
221 if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
222 of_device_is_compatible(np, "snps,dwmac-3.710")) {
224 plat->bugged_jumbo = 1;
225 plat->force_sf_dma_mode = 1;
228 if (of_find_property(np, "snps,pbl", NULL)) {
229 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
233 return ERR_PTR(-ENOMEM);
235 plat->dma_cfg = dma_cfg;
236 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
237 dma_cfg->fixed_burst =
238 of_property_read_bool(np, "snps,fixed-burst");
239 dma_cfg->mixed_burst =
240 of_property_read_bool(np, "snps,mixed-burst");
241 of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len);
242 if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256)
243 dma_cfg->burst_len = 0;
245 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
246 if (plat->force_thresh_dma_mode) {
247 plat->force_sf_dma_mode = 0;
248 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
254 static struct plat_stmmacenet_data *
255 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
257 return ERR_PTR(-ENOSYS);
259 #endif /* CONFIG_OF */
261 static int stmmac_get_platform_resources(struct platform_device *pdev,
262 struct stmmac_resources *stmmac_res)
264 struct resource *res;
266 memset(stmmac_res, 0, sizeof(*stmmac_res));
268 /* Get IRQ information early to have an ability to ask for deferred
269 * probe if needed before we went too far with resource allocation.
271 stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
272 if (stmmac_res->irq < 0) {
273 if (stmmac_res->irq != -EPROBE_DEFER) {
275 "MAC IRQ configuration information not found\n");
277 return stmmac_res->irq;
280 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
281 * The external wake up irq can be passed through the platform code
282 * named as "eth_wake_irq"
284 * In case the wake up interrupt is not passed from the platform
285 * so the driver will continue to use the mac irq (ndev->irq)
287 stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
288 if (stmmac_res->wol_irq < 0) {
289 if (stmmac_res->wol_irq == -EPROBE_DEFER)
290 return -EPROBE_DEFER;
291 stmmac_res->wol_irq = stmmac_res->irq;
294 stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
295 if (stmmac_res->lpi_irq == -EPROBE_DEFER)
296 return -EPROBE_DEFER;
298 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
299 stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
300 if (IS_ERR(stmmac_res->addr))
301 return PTR_ERR(stmmac_res->addr);
307 * stmmac_pltfr_probe - platform driver probe.
308 * @pdev: platform device pointer
309 * Description: platform_device probe function. It is to allocate
310 * the necessary platform resources, invoke custom helper (if required) and
311 * invoke the main probe function.
313 int stmmac_pltfr_probe(struct platform_device *pdev)
315 struct plat_stmmacenet_data *plat_dat;
316 struct stmmac_resources stmmac_res;
319 ret = stmmac_get_platform_resources(pdev, &stmmac_res);
323 if (pdev->dev.of_node) {
324 plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
325 if (IS_ERR(plat_dat)) {
326 dev_err(&pdev->dev, "dt configuration failed\n");
327 return PTR_ERR(plat_dat);
330 plat_dat = dev_get_platdata(&pdev->dev);
332 dev_err(&pdev->dev, "no platform data provided\n");
336 /* Set default value for multicast hash bins */
337 plat_dat->multicast_filter_bins = HASH_TABLE_SIZE;
339 /* Set default value for unicast filter entries */
340 plat_dat->unicast_filter_entries = 1;
343 /* Custom setup (if needed) */
344 if (plat_dat->setup) {
345 plat_dat->bsp_priv = plat_dat->setup(pdev);
346 if (IS_ERR(plat_dat->bsp_priv))
347 return PTR_ERR(plat_dat->bsp_priv);
350 /* Custom initialisation (if needed)*/
351 if (plat_dat->init) {
352 ret = plat_dat->init(pdev, plat_dat->bsp_priv);
357 return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
359 EXPORT_SYMBOL_GPL(stmmac_pltfr_probe);
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 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);
381 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
383 #ifdef CONFIG_PM_SLEEP
385 * stmmac_pltfr_suspend
386 * @dev: device pointer
387 * Description: this function is invoked when suspend the driver and it direcly
388 * call the main suspend function and then, if required, on some platform, it
389 * can call an exit helper.
391 static int stmmac_pltfr_suspend(struct device *dev)
394 struct net_device *ndev = dev_get_drvdata(dev);
395 struct stmmac_priv *priv = netdev_priv(ndev);
396 struct platform_device *pdev = to_platform_device(dev);
398 ret = stmmac_suspend(ndev);
399 if (priv->plat->exit)
400 priv->plat->exit(pdev, priv->plat->bsp_priv);
406 * stmmac_pltfr_resume
407 * @dev: device pointer
408 * Description: this function is invoked when resume the driver before calling
409 * the main resume function, on some platforms, it can call own init helper
412 static int stmmac_pltfr_resume(struct device *dev)
414 struct net_device *ndev = dev_get_drvdata(dev);
415 struct stmmac_priv *priv = netdev_priv(ndev);
416 struct platform_device *pdev = to_platform_device(dev);
418 if (priv->plat->init)
419 priv->plat->init(pdev, priv->plat->bsp_priv);
421 return stmmac_resume(ndev);
423 #endif /* CONFIG_PM_SLEEP */
425 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
426 stmmac_pltfr_resume);
427 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);