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 The full GNU General Public License is included in this distribution in
16 the file called "COPYING".
18 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
19 *******************************************************************************/
21 #include <linux/platform_device.h>
22 #include <linux/module.h>
25 #include <linux/of_net.h>
26 #include <linux/of_device.h>
27 #include <linux/of_mdio.h>
30 #include "stmmac_platform.h"
35 * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
36 * @mcast_bins: Multicast filtering bins
38 * this function validates the number of Multicast filtering bins specified
39 * by the configuration through the device tree. The Synopsys GMAC supports
40 * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
41 * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
42 * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
43 * invalid and will cause the filtering algorithm to use Multicast
46 static int dwmac1000_validate_mcast_bins(int mcast_bins)
57 pr_info("Hash table entries set to unexpected value %d",
65 * dwmac1000_validate_ucast_entries - validate the Unicast address entries
66 * @ucast_entries: number of Unicast address entries
68 * This function validates the number of Unicast address entries supported
69 * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
70 * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
71 * logic. This function validates a valid, supported configuration is
72 * selected, and defaults to 1 Unicast address if an unsupported
73 * configuration is selected.
75 static int dwmac1000_validate_ucast_entries(int ucast_entries)
77 int x = ucast_entries;
86 pr_info("Unicast table entries set to unexpected value %d\n",
94 * stmmac_axi_setup - parse DT parameters for programming the AXI register
95 * @pdev: platform device
97 * if required, from device-tree the AXI internal register can be tuned
98 * by using platform parameters.
100 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
102 struct device_node *np;
103 struct stmmac_axi *axi;
105 np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
109 axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
112 return ERR_PTR(-ENOMEM);
115 axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
116 axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
117 axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
118 axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
119 axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
120 axi->axi_rb = of_property_read_bool(np, "snps,axi_rb");
122 if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
123 axi->axi_wr_osr_lmt = 1;
124 if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
125 axi->axi_rd_osr_lmt = 1;
126 of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
133 * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
134 * @pdev: platform device
136 static int stmmac_mtl_setup(struct platform_device *pdev,
137 struct plat_stmmacenet_data *plat)
139 struct device_node *q_node;
140 struct device_node *rx_node;
141 struct device_node *tx_node;
145 /* For backwards-compatibility with device trees that don't have any
146 * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
147 * to one RX and TX queues each.
149 plat->rx_queues_to_use = 1;
150 plat->tx_queues_to_use = 1;
152 /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
153 * to always set this, otherwise Queue will be classified as AVB
154 * (because MTL_QUEUE_AVB = 0).
156 plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
157 plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
159 rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
163 tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
165 of_node_put(rx_node);
169 /* Processing RX queues common config */
170 if (of_property_read_u32(rx_node, "snps,rx-queues-to-use",
171 &plat->rx_queues_to_use))
172 plat->rx_queues_to_use = 1;
174 if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
175 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
176 else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
177 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
179 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
181 /* Processing individual RX queue config */
182 for_each_child_of_node(rx_node, q_node) {
183 if (queue >= plat->rx_queues_to_use)
186 if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
187 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
188 else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
189 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
191 plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
193 if (of_property_read_u32(q_node, "snps,map-to-dma-channel",
194 &plat->rx_queues_cfg[queue].chan))
195 plat->rx_queues_cfg[queue].chan = queue;
196 /* TODO: Dynamic mapping to be included in the future */
198 if (of_property_read_u32(q_node, "snps,priority",
199 &plat->rx_queues_cfg[queue].prio)) {
200 plat->rx_queues_cfg[queue].prio = 0;
201 plat->rx_queues_cfg[queue].use_prio = false;
203 plat->rx_queues_cfg[queue].use_prio = true;
206 /* RX queue specific packet type routing */
207 if (of_property_read_bool(q_node, "snps,route-avcp"))
208 plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
209 else if (of_property_read_bool(q_node, "snps,route-ptp"))
210 plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
211 else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
212 plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
213 else if (of_property_read_bool(q_node, "snps,route-up"))
214 plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
215 else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
216 plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
218 plat->rx_queues_cfg[queue].pkt_route = 0x0;
222 if (queue != plat->rx_queues_to_use) {
224 dev_err(&pdev->dev, "Not all RX queues were configured\n");
228 /* Processing TX queues common config */
229 if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
230 &plat->tx_queues_to_use))
231 plat->tx_queues_to_use = 1;
233 if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
234 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
235 else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
236 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
237 else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
238 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
239 else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
240 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
242 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
246 /* Processing individual TX queue config */
247 for_each_child_of_node(tx_node, q_node) {
248 if (queue >= plat->tx_queues_to_use)
251 if (of_property_read_u32(q_node, "snps,weight",
252 &plat->tx_queues_cfg[queue].weight))
253 plat->tx_queues_cfg[queue].weight = 0x10 + queue;
255 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
256 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
257 } else if (of_property_read_bool(q_node,
258 "snps,avb-algorithm")) {
259 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
261 /* Credit Base Shaper parameters used by AVB */
262 if (of_property_read_u32(q_node, "snps,send_slope",
263 &plat->tx_queues_cfg[queue].send_slope))
264 plat->tx_queues_cfg[queue].send_slope = 0x0;
265 if (of_property_read_u32(q_node, "snps,idle_slope",
266 &plat->tx_queues_cfg[queue].idle_slope))
267 plat->tx_queues_cfg[queue].idle_slope = 0x0;
268 if (of_property_read_u32(q_node, "snps,high_credit",
269 &plat->tx_queues_cfg[queue].high_credit))
270 plat->tx_queues_cfg[queue].high_credit = 0x0;
271 if (of_property_read_u32(q_node, "snps,low_credit",
272 &plat->tx_queues_cfg[queue].low_credit))
273 plat->tx_queues_cfg[queue].low_credit = 0x0;
275 plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
278 if (of_property_read_u32(q_node, "snps,priority",
279 &plat->tx_queues_cfg[queue].prio)) {
280 plat->tx_queues_cfg[queue].prio = 0;
281 plat->tx_queues_cfg[queue].use_prio = false;
283 plat->tx_queues_cfg[queue].use_prio = true;
288 if (queue != plat->tx_queues_to_use) {
290 dev_err(&pdev->dev, "Not all TX queues were configured\n");
295 of_node_put(rx_node);
296 of_node_put(tx_node);
303 * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
304 * @plat: driver data platform structure
305 * @np: device tree node
306 * @dev: device pointer
308 * The mdio bus will be allocated in case of a phy transceiver is on board;
309 * it will be NULL if the fixed-link is configured.
310 * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
311 * in any case (for DSA, mdio must be registered even if fixed-link).
312 * The table below sums the supported configurations:
313 * -------------------------------
315 * -------------------------------
317 * -------------------------------
319 * -------------------------------
323 * -------------------------------
325 * It returns 0 in case of success otherwise -ENODEV.
327 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
328 struct device_node *np, struct device *dev)
331 static const struct of_device_id need_mdio_ids[] = {
332 { .compatible = "snps,dwc-qos-ethernet-4.10" },
336 /* If phy-handle property is passed from DT, use it as the PHY */
337 plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
339 dev_dbg(dev, "Found phy-handle subnode\n");
341 /* If phy-handle is not specified, check if we have a fixed-phy */
342 if (!plat->phy_node && of_phy_is_fixed_link(np)) {
343 if ((of_phy_register_fixed_link(np) < 0))
346 dev_dbg(dev, "Found fixed-link subnode\n");
347 plat->phy_node = of_node_get(np);
351 if (of_match_node(need_mdio_ids, np)) {
352 plat->mdio_node = of_get_child_by_name(np, "mdio");
355 * If snps,dwmac-mdio is passed from DT, always register
358 for_each_child_of_node(np, plat->mdio_node) {
359 if (of_device_is_compatible(plat->mdio_node,
365 if (plat->mdio_node) {
366 dev_dbg(dev, "Found MDIO subnode\n");
371 plat->mdio_bus_data =
372 devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
378 * stmmac_probe_config_dt - parse device-tree driver parameters
379 * @pdev: platform_device structure
380 * @mac: MAC address to use
382 * this function is to read the driver parameters from device-tree and
383 * set some private fields that will be used by the main at runtime.
385 struct plat_stmmacenet_data *
386 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
388 struct device_node *np = pdev->dev.of_node;
389 struct plat_stmmacenet_data *plat;
390 struct stmmac_dma_cfg *dma_cfg;
393 plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
395 return ERR_PTR(-ENOMEM);
397 *mac = of_get_mac_address(np);
398 plat->interface = of_get_phy_mode(np);
400 /* Get max speed of operation from device tree */
401 if (of_property_read_u32(np, "max-speed", &plat->max_speed))
402 plat->max_speed = -1;
404 plat->bus_id = of_alias_get_id(np, "ethernet");
405 if (plat->bus_id < 0)
408 /* Default to phy auto-detection */
411 /* Get clk_csr from device tree */
412 of_property_read_u32(np, "clk_csr", &plat->clk_csr);
414 /* "snps,phy-addr" is not a standard property. Mark it as deprecated
415 * and warn of its use. Remove this when phy node support is added.
417 if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
418 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
420 /* To Configure PHY by using all device-tree supported properties */
421 rc = stmmac_dt_phy(plat, np, &pdev->dev);
425 of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
427 of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
429 plat->force_sf_dma_mode =
430 of_property_read_bool(np, "snps,force_sf_dma_mode");
432 plat->en_tx_lpi_clockgating =
433 of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
435 /* Set the maxmtu to a default of JUMBO_LEN in case the
436 * parameter is not present in the device tree.
438 plat->maxmtu = JUMBO_LEN;
440 /* Set default value for multicast hash bins */
441 plat->multicast_filter_bins = HASH_TABLE_SIZE;
443 /* Set default value for unicast filter entries */
444 plat->unicast_filter_entries = 1;
447 * Currently only the properties needed on SPEAr600
448 * are provided. All other properties should be added
449 * once needed on other platforms.
451 if (of_device_is_compatible(np, "st,spear600-gmac") ||
452 of_device_is_compatible(np, "snps,dwmac-3.50a") ||
453 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
454 of_device_is_compatible(np, "snps,dwmac")) {
455 /* Note that the max-frame-size parameter as defined in the
456 * ePAPR v1.1 spec is defined as max-frame-size, it's
457 * actually used as the IEEE definition of MAC Client
458 * data, or MTU. The ePAPR specification is confusing as
459 * the definition is max-frame-size, but usage examples
462 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
463 of_property_read_u32(np, "snps,multicast-filter-bins",
464 &plat->multicast_filter_bins);
465 of_property_read_u32(np, "snps,perfect-filter-entries",
466 &plat->unicast_filter_entries);
467 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
468 plat->unicast_filter_entries);
469 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
470 plat->multicast_filter_bins);
475 if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
476 of_device_is_compatible(np, "snps,dwmac-4.10a") ||
477 of_device_is_compatible(np, "snps,dwmac-4.20a")) {
481 plat->tso_en = of_property_read_bool(np, "snps,tso");
484 if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
485 of_device_is_compatible(np, "snps,dwmac-3.710")) {
487 plat->bugged_jumbo = 1;
488 plat->force_sf_dma_mode = 1;
491 if (of_device_is_compatible(np, "snps,dwxgmac")) {
494 plat->tso_en = of_property_read_bool(np, "snps,tso");
497 dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
500 stmmac_remove_config_dt(pdev, plat);
501 return ERR_PTR(-ENOMEM);
503 plat->dma_cfg = dma_cfg;
505 of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
507 dma_cfg->pbl = DEFAULT_DMA_PBL;
508 of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
509 of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
510 dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
512 dma_cfg->aal = of_property_read_bool(np, "snps,aal");
513 dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
514 dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
516 plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
517 if (plat->force_thresh_dma_mode) {
518 plat->force_sf_dma_mode = 0;
519 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
522 of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
524 plat->axi = stmmac_axi_setup(pdev);
526 rc = stmmac_mtl_setup(pdev, plat);
528 stmmac_remove_config_dt(pdev, plat);
533 plat->stmmac_clk = devm_clk_get(&pdev->dev,
534 STMMAC_RESOURCE_NAME);
535 if (IS_ERR(plat->stmmac_clk)) {
536 dev_warn(&pdev->dev, "Cannot get CSR clock\n");
537 plat->stmmac_clk = NULL;
539 clk_prepare_enable(plat->stmmac_clk);
541 plat->pclk = devm_clk_get(&pdev->dev, "pclk");
542 if (IS_ERR(plat->pclk)) {
543 if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
548 clk_prepare_enable(plat->pclk);
550 /* Fall-back to main clock in case of no PTP ref is passed */
551 plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
552 if (IS_ERR(plat->clk_ptp_ref)) {
553 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
554 plat->clk_ptp_ref = NULL;
555 dev_warn(&pdev->dev, "PTP uses main clock\n");
557 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
558 dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
561 plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
562 STMMAC_RESOURCE_NAME);
563 if (IS_ERR(plat->stmmac_rst)) {
564 if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
567 dev_info(&pdev->dev, "no reset control found\n");
568 plat->stmmac_rst = NULL;
574 clk_disable_unprepare(plat->pclk);
576 clk_disable_unprepare(plat->stmmac_clk);
578 return ERR_PTR(-EPROBE_DEFER);
582 * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
583 * @pdev: platform_device structure
584 * @plat: driver data platform structure
586 * Release resources claimed by stmmac_probe_config_dt().
588 void stmmac_remove_config_dt(struct platform_device *pdev,
589 struct plat_stmmacenet_data *plat)
591 struct device_node *np = pdev->dev.of_node;
593 if (of_phy_is_fixed_link(np))
594 of_phy_deregister_fixed_link(np);
595 of_node_put(plat->phy_node);
596 of_node_put(plat->mdio_node);
599 struct plat_stmmacenet_data *
600 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
602 return ERR_PTR(-EINVAL);
605 void stmmac_remove_config_dt(struct platform_device *pdev,
606 struct plat_stmmacenet_data *plat)
609 #endif /* CONFIG_OF */
610 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
611 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
613 int stmmac_get_platform_resources(struct platform_device *pdev,
614 struct stmmac_resources *stmmac_res)
616 struct resource *res;
618 memset(stmmac_res, 0, sizeof(*stmmac_res));
620 /* Get IRQ information early to have an ability to ask for deferred
621 * probe if needed before we went too far with resource allocation.
623 stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
624 if (stmmac_res->irq < 0) {
625 if (stmmac_res->irq != -EPROBE_DEFER) {
627 "MAC IRQ configuration information not found\n");
629 return stmmac_res->irq;
632 /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
633 * The external wake up irq can be passed through the platform code
634 * named as "eth_wake_irq"
636 * In case the wake up interrupt is not passed from the platform
637 * so the driver will continue to use the mac irq (ndev->irq)
639 stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
640 if (stmmac_res->wol_irq < 0) {
641 if (stmmac_res->wol_irq == -EPROBE_DEFER)
642 return -EPROBE_DEFER;
643 stmmac_res->wol_irq = stmmac_res->irq;
646 stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
647 if (stmmac_res->lpi_irq == -EPROBE_DEFER)
648 return -EPROBE_DEFER;
650 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
651 stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
653 return PTR_ERR_OR_ZERO(stmmac_res->addr);
655 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
658 * stmmac_pltfr_remove
659 * @pdev: platform device pointer
660 * Description: this function calls the main to free the net resources
661 * and calls the platforms hook and release the resources (e.g. mem).
663 int stmmac_pltfr_remove(struct platform_device *pdev)
665 struct net_device *ndev = platform_get_drvdata(pdev);
666 struct stmmac_priv *priv = netdev_priv(ndev);
667 struct plat_stmmacenet_data *plat = priv->plat;
668 int ret = stmmac_dvr_remove(&pdev->dev);
671 plat->exit(pdev, plat->bsp_priv);
673 stmmac_remove_config_dt(pdev, plat);
677 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
679 #ifdef CONFIG_PM_SLEEP
681 * stmmac_pltfr_suspend
682 * @dev: device pointer
683 * Description: this function is invoked when suspend the driver and it direcly
684 * call the main suspend function and then, if required, on some platform, it
685 * can call an exit helper.
687 static int stmmac_pltfr_suspend(struct device *dev)
690 struct net_device *ndev = dev_get_drvdata(dev);
691 struct stmmac_priv *priv = netdev_priv(ndev);
692 struct platform_device *pdev = to_platform_device(dev);
694 ret = stmmac_suspend(dev);
695 if (priv->plat->exit)
696 priv->plat->exit(pdev, priv->plat->bsp_priv);
702 * stmmac_pltfr_resume
703 * @dev: device pointer
704 * Description: this function is invoked when resume the driver before calling
705 * the main resume function, on some platforms, it can call own init helper
708 static int stmmac_pltfr_resume(struct device *dev)
710 struct net_device *ndev = dev_get_drvdata(dev);
711 struct stmmac_priv *priv = netdev_priv(ndev);
712 struct platform_device *pdev = to_platform_device(dev);
714 if (priv->plat->init)
715 priv->plat->init(pdev, priv->plat->bsp_priv);
717 return stmmac_resume(dev);
719 #endif /* CONFIG_PM_SLEEP */
721 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
722 stmmac_pltfr_resume);
723 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
725 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
726 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
727 MODULE_LICENSE("GPL");