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   The full GNU General Public License is included in this distribution in
  16   the file called "COPYING".
  17
  18   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
  19 *******************************************************************************/
  20
  21 #include <linux/platform_device.h>
  22 #include <linux/module.h>
  23 #include <linux/io.h>
  24 #include <linux/of.h>
  25 #include <linux/of_net.h>
  26 #include <linux/of_device.h>
  27 #include <linux/of_mdio.h>
  28
  29 #include "stmmac.h"
  30 #include "stmmac_platform.h"
  31
  32 #ifdef CONFIG_OF
  33
  34 /**
  35  * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
  36  * @mcast_bins: Multicast filtering bins
  37  * Description:
  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
  44  * promiscuous mode.
  45  */
  46 static int dwmac1000_validate_mcast_bins(int mcast_bins)
  47 {
  48         int x = mcast_bins;
  49
  50         switch (x) {
  51         case HASH_TABLE_SIZE:
  52         case 128:
  53         case 256:
  54                 break;
  55         default:
  56                 x = 0;
  57                 pr_info("Hash table entries set to unexpected value %d",
  58                         mcast_bins);
  59                 break;
  60         }
  61         return x;
  62 }
  63
  64 /**
  65  * dwmac1000_validate_ucast_entries - validate the Unicast address entries
  66  * @ucast_entries: number of Unicast address entries
  67  * Description:
  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.
  74  */
  75 static int dwmac1000_validate_ucast_entries(int ucast_entries)
  76 {
  77         int x = ucast_entries;
  78
  79         switch (x) {
  80         case 1:
  81         case 32:
  82         case 64:
  83         case 128:
  84                 break;
  85         default:
  86                 x = 1;
  87                 pr_info("Unicast table entries set to unexpected value %d\n",
  88                         ucast_entries);
  89                 break;
  90         }
  91         return x;
  92 }
  93
  94 /**
  95  * stmmac_axi_setup - parse DT parameters for programming the AXI register
  96  * @pdev: platform device
  97  * @priv: driver private struct.
  98  * Description:
  99  * if required, from device-tree the AXI internal register can be tuned
 100  * by using platform parameters.
 101  */
 102 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
 103 {
 104         struct device_node *np;
 105         struct stmmac_axi *axi;
 106
 107         np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
 108         if (!np)
 109                 return NULL;
 110
 111         axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
 112         if (!axi) {
 113                 of_node_put(np);
 114                 return ERR_PTR(-ENOMEM);
 115         }
 116
 117         axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
 118         axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
 119         axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
 120         axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
 121         axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
 122         axi->axi_rb =  of_property_read_bool(np, "snps,axi_rb");
 123
 124         if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
 125                 axi->axi_wr_osr_lmt = 1;
 126         if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
 127                 axi->axi_rd_osr_lmt = 1;
 128         of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
 129         of_node_put(np);
 130
 131         return axi;
 132 }
 133
 134 /**
 135  * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
 136  * @pdev: platform device
 137  */
 138 static void stmmac_mtl_setup(struct platform_device *pdev,
 139                              struct plat_stmmacenet_data *plat)
 140 {
 141         struct device_node *q_node;
 142         struct device_node *rx_node;
 143         struct device_node *tx_node;
 144         u8 queue = 0;
 145
 146         /* For backwards-compatibility with device trees that don't have any
 147          * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
 148          * to one RX and TX queues each.
 149          */
 150         plat->rx_queues_to_use = 1;
 151         plat->tx_queues_to_use = 1;
 152
 153         /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
 154          * to always set this, otherwise Queue will be classified as AVB
 155          * (because MTL_QUEUE_AVB = 0).
 156          */
 157         plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 158         plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 159
 160         rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
 161         if (!rx_node)
 162                 return;
 163
 164         tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
 165         if (!tx_node) {
 166                 of_node_put(rx_node);
 167                 return;
 168         }
 169
 170         /* Processing RX queues common config */
 171         if (of_property_read_u8(rx_node, "snps,rx-queues-to-use",
 172                                 &plat->rx_queues_to_use))
 173                 plat->rx_queues_to_use = 1;
 174
 175         if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
 176                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 177         else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
 178                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
 179         else
 180                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 181
 182         /* Processing individual RX queue config */
 183         for_each_child_of_node(rx_node, q_node) {
 184                 if (queue >= plat->rx_queues_to_use)
 185                         break;
 186
 187                 if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
 188                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 189                 else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
 190                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 191                 else
 192                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 193
 194                 if (of_property_read_u8(q_node, "snps,map-to-dma-channel",
 195                                         &plat->rx_queues_cfg[queue].chan))
 196                         plat->rx_queues_cfg[queue].chan = queue;
 197                 /* TODO: Dynamic mapping to be included in the future */
 198
 199                 if (of_property_read_u32(q_node, "snps,priority",
 200                                         &plat->rx_queues_cfg[queue].prio)) {
 201                         plat->rx_queues_cfg[queue].prio = 0;
 202                         plat->rx_queues_cfg[queue].use_prio = false;
 203                 } else {
 204                         plat->rx_queues_cfg[queue].use_prio = true;
 205                 }
 206
 207                 /* RX queue specific packet type routing */
 208                 if (of_property_read_bool(q_node, "snps,route-avcp"))
 209                         plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
 210                 else if (of_property_read_bool(q_node, "snps,route-ptp"))
 211                         plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
 212                 else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
 213                         plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
 214                 else if (of_property_read_bool(q_node, "snps,route-up"))
 215                         plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
 216                 else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
 217                         plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
 218                 else
 219                         plat->rx_queues_cfg[queue].pkt_route = 0x0;
 220
 221                 queue++;
 222         }
 223
 224         /* Processing TX queues common config */
 225         if (of_property_read_u8(tx_node, "snps,tx-queues-to-use",
 226                                 &plat->tx_queues_to_use))
 227                 plat->tx_queues_to_use = 1;
 228
 229         if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
 230                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
 231         else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
 232                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
 233         else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
 234                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
 235         else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
 236                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 237         else
 238                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 239
 240         queue = 0;
 241
 242         /* Processing individual TX queue config */
 243         for_each_child_of_node(tx_node, q_node) {
 244                 if (queue >= plat->tx_queues_to_use)
 245                         break;
 246
 247                 if (of_property_read_u8(q_node, "snps,weight",
 248                                         &plat->tx_queues_cfg[queue].weight))
 249                         plat->tx_queues_cfg[queue].weight = 0x10 + queue;
 250
 251                 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
 252                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 253                 } else if (of_property_read_bool(q_node,
 254                                                  "snps,avb-algorithm")) {
 255                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 256
 257                         /* Credit Base Shaper parameters used by AVB */
 258                         if (of_property_read_u32(q_node, "snps,send_slope",
 259                                 &plat->tx_queues_cfg[queue].send_slope))
 260                                 plat->tx_queues_cfg[queue].send_slope = 0x0;
 261                         if (of_property_read_u32(q_node, "snps,idle_slope",
 262                                 &plat->tx_queues_cfg[queue].idle_slope))
 263                                 plat->tx_queues_cfg[queue].idle_slope = 0x0;
 264                         if (of_property_read_u32(q_node, "snps,high_credit",
 265                                 &plat->tx_queues_cfg[queue].high_credit))
 266                                 plat->tx_queues_cfg[queue].high_credit = 0x0;
 267                         if (of_property_read_u32(q_node, "snps,low_credit",
 268                                 &plat->tx_queues_cfg[queue].low_credit))
 269                                 plat->tx_queues_cfg[queue].low_credit = 0x0;
 270                 } else {
 271                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 272                 }
 273
 274                 if (of_property_read_u32(q_node, "snps,priority",
 275                                         &plat->tx_queues_cfg[queue].prio)) {
 276                         plat->tx_queues_cfg[queue].prio = 0;
 277                         plat->tx_queues_cfg[queue].use_prio = false;
 278                 } else {
 279                         plat->tx_queues_cfg[queue].use_prio = true;
 280                 }
 281
 282                 queue++;
 283         }
 284
 285         of_node_put(rx_node);
 286         of_node_put(tx_node);
 287         of_node_put(q_node);
 288 }
 289
 290 /**
 291  * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
 292  * @plat: driver data platform structure
 293  * @np: device tree node
 294  * @dev: device pointer
 295  * Description:
 296  * The mdio bus will be allocated in case of a phy transceiver is on board;
 297  * it will be NULL if the fixed-link is configured.
 298  * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
 299  * in any case (for DSA, mdio must be registered even if fixed-link).
 300  * The table below sums the supported configurations:
 301  *      -------------------------------
 302  *      snps,phy-addr   |     Y
 303  *      -------------------------------
 304  *      phy-handle      |     Y
 305  *      -------------------------------
 306  *      fixed-link      |     N
 307  *      -------------------------------
 308  *      snps,dwmac-mdio |
 309  *        even if       |     Y
 310  *      fixed-link      |
 311  *      -------------------------------
 312  *
 313  * It returns 0 in case of success otherwise -ENODEV.
 314  */
 315 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
 316                          struct device_node *np, struct device *dev)
 317 {
 318         bool mdio = true;
 319         static const struct of_device_id need_mdio_ids[] = {
 320                 { .compatible = "snps,dwc-qos-ethernet-4.10" },
 321                 { .compatible = "allwinner,sun8i-a83t-emac" },
 322                 { .compatible = "allwinner,sun8i-h3-emac" },
 323                 { .compatible = "allwinner,sun8i-v3s-emac" },
 324                 { .compatible = "allwinner,sun50i-a64-emac" },
 325                 {},
 326         };
 327
 328         /* If phy-handle property is passed from DT, use it as the PHY */
 329         plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
 330         if (plat->phy_node)
 331                 dev_dbg(dev, "Found phy-handle subnode\n");
 332
 333         /* If phy-handle is not specified, check if we have a fixed-phy */
 334         if (!plat->phy_node && of_phy_is_fixed_link(np)) {
 335                 if ((of_phy_register_fixed_link(np) < 0))
 336                         return -ENODEV;
 337
 338                 dev_dbg(dev, "Found fixed-link subnode\n");
 339                 plat->phy_node = of_node_get(np);
 340                 mdio = false;
 341         }
 342
 343         if (of_match_node(need_mdio_ids, np)) {
 344                 plat->mdio_node = of_get_child_by_name(np, "mdio");
 345         } else {
 346                 /**
 347                  * If snps,dwmac-mdio is passed from DT, always register
 348                  * the MDIO
 349                  */
 350                 for_each_child_of_node(np, plat->mdio_node) {
 351                         if (of_device_is_compatible(plat->mdio_node,
 352                                                     "snps,dwmac-mdio"))
 353                                 break;
 354                 }
 355         }
 356
 357         if (plat->mdio_node) {
 358                 dev_dbg(dev, "Found MDIO subnode\n");
 359                 mdio = true;
 360         }
 361
 362         if (mdio)
 363                 plat->mdio_bus_data =
 364                         devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
 365                                      GFP_KERNEL);
 366         return 0;
 367 }
 368
 369 /**
 370  * stmmac_probe_config_dt - parse device-tree driver parameters
 371  * @pdev: platform_device structure
 372  * @mac: MAC address to use
 373  * Description:
 374  * this function is to read the driver parameters from device-tree and
 375  * set some private fields that will be used by the main at runtime.
 376  */
 377 struct plat_stmmacenet_data *
 378 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 379 {
 380         struct device_node *np = pdev->dev.of_node;
 381         struct plat_stmmacenet_data *plat;
 382         struct stmmac_dma_cfg *dma_cfg;
 383
 384         plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
 385         if (!plat)
 386                 return ERR_PTR(-ENOMEM);
 387
 388         *mac = of_get_mac_address(np);
 389         plat->interface = of_get_phy_mode(np);
 390
 391         /* Get max speed of operation from device tree */
 392         if (of_property_read_u32(np, "max-speed", &plat->max_speed))
 393                 plat->max_speed = -1;
 394
 395         plat->bus_id = of_alias_get_id(np, "ethernet");
 396         if (plat->bus_id < 0)
 397                 plat->bus_id = 0;
 398
 399         /* Default to phy auto-detection */
 400         plat->phy_addr = -1;
 401
 402         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
 403          * and warn of its use. Remove this when phy node support is added.
 404          */
 405         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
 406                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
 407
 408         /* To Configure PHY by using all device-tree supported properties */
 409         if (stmmac_dt_phy(plat, np, &pdev->dev))
 410                 return ERR_PTR(-ENODEV);
 411
 412         of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
 413
 414         of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
 415
 416         plat->force_sf_dma_mode =
 417                 of_property_read_bool(np, "snps,force_sf_dma_mode");
 418
 419         plat->en_tx_lpi_clockgating =
 420                 of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
 421
 422         /* Set the maxmtu to a default of JUMBO_LEN in case the
 423          * parameter is not present in the device tree.
 424          */
 425         plat->maxmtu = JUMBO_LEN;
 426
 427         /* Set default value for multicast hash bins */
 428         plat->multicast_filter_bins = HASH_TABLE_SIZE;
 429
 430         /* Set default value for unicast filter entries */
 431         plat->unicast_filter_entries = 1;
 432
 433         /*
 434          * Currently only the properties needed on SPEAr600
 435          * are provided. All other properties should be added
 436          * once needed on other platforms.
 437          */
 438         if (of_device_is_compatible(np, "st,spear600-gmac") ||
 439                 of_device_is_compatible(np, "snps,dwmac-3.50a") ||
 440                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
 441                 of_device_is_compatible(np, "snps,dwmac")) {
 442                 /* Note that the max-frame-size parameter as defined in the
 443                  * ePAPR v1.1 spec is defined as max-frame-size, it's
 444                  * actually used as the IEEE definition of MAC Client
 445                  * data, or MTU. The ePAPR specification is confusing as
 446                  * the definition is max-frame-size, but usage examples
 447                  * are clearly MTUs
 448                  */
 449                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
 450                 of_property_read_u32(np, "snps,multicast-filter-bins",
 451                                      &plat->multicast_filter_bins);
 452                 of_property_read_u32(np, "snps,perfect-filter-entries",
 453                                      &plat->unicast_filter_entries);
 454                 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
 455                                                plat->unicast_filter_entries);
 456                 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
 457                                               plat->multicast_filter_bins);
 458                 plat->has_gmac = 1;
 459                 plat->pmt = 1;
 460         }
 461
 462         if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
 463             of_device_is_compatible(np, "snps,dwmac-4.10a")) {
 464                 plat->has_gmac4 = 1;
 465                 plat->has_gmac = 0;
 466                 plat->pmt = 1;
 467                 plat->tso_en = of_property_read_bool(np, "snps,tso");
 468         }
 469
 470         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
 471                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
 472                 plat->enh_desc = 1;
 473                 plat->bugged_jumbo = 1;
 474                 plat->force_sf_dma_mode = 1;
 475         }
 476
 477         dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
 478                                GFP_KERNEL);
 479         if (!dma_cfg) {
 480                 stmmac_remove_config_dt(pdev, plat);
 481                 return ERR_PTR(-ENOMEM);
 482         }
 483         plat->dma_cfg = dma_cfg;
 484
 485         of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
 486         if (!dma_cfg->pbl)
 487                 dma_cfg->pbl = DEFAULT_DMA_PBL;
 488         of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
 489         of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
 490         dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
 491
 492         dma_cfg->aal = of_property_read_bool(np, "snps,aal");
 493         dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
 494         dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
 495
 496         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
 497         if (plat->force_thresh_dma_mode) {
 498                 plat->force_sf_dma_mode = 0;
 499                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
 500         }
 501
 502         of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
 503
 504         plat->axi = stmmac_axi_setup(pdev);
 505
 506         stmmac_mtl_setup(pdev, plat);
 507
 508         /* clock setup */
 509         plat->stmmac_clk = devm_clk_get(&pdev->dev,
 510                                         STMMAC_RESOURCE_NAME);
 511         if (IS_ERR(plat->stmmac_clk)) {
 512                 dev_warn(&pdev->dev, "Cannot get CSR clock\n");
 513                 plat->stmmac_clk = NULL;
 514         }
 515         clk_prepare_enable(plat->stmmac_clk);
 516
 517         plat->pclk = devm_clk_get(&pdev->dev, "pclk");
 518         if (IS_ERR(plat->pclk)) {
 519                 if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
 520                         goto error_pclk_get;
 521
 522                 plat->pclk = NULL;
 523         }
 524         clk_prepare_enable(plat->pclk);
 525
 526         /* Fall-back to main clock in case of no PTP ref is passed */
 527         plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
 528         if (IS_ERR(plat->clk_ptp_ref)) {
 529                 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
 530                 plat->clk_ptp_ref = NULL;
 531                 dev_warn(&pdev->dev, "PTP uses main clock\n");
 532         } else {
 533                 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
 534                 dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
 535         }
 536
 537         plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
 538                                                   STMMAC_RESOURCE_NAME);
 539         if (IS_ERR(plat->stmmac_rst)) {
 540                 if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
 541                         goto error_hw_init;
 542
 543                 dev_info(&pdev->dev, "no reset control found\n");
 544                 plat->stmmac_rst = NULL;
 545         }
 546
 547         return plat;
 548
 549 error_hw_init:
 550         clk_disable_unprepare(plat->pclk);
 551 error_pclk_get:
 552         clk_disable_unprepare(plat->stmmac_clk);
 553
 554         return ERR_PTR(-EPROBE_DEFER);
 555 }
 556
 557 /**
 558  * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
 559  * @pdev: platform_device structure
 560  * @plat: driver data platform structure
 561  *
 562  * Release resources claimed by stmmac_probe_config_dt().
 563  */
 564 void stmmac_remove_config_dt(struct platform_device *pdev,
 565                              struct plat_stmmacenet_data *plat)
 566 {
 567         struct device_node *np = pdev->dev.of_node;
 568
 569         if (of_phy_is_fixed_link(np))
 570                 of_phy_deregister_fixed_link(np);
 571         of_node_put(plat->phy_node);
 572         of_node_put(plat->mdio_node);
 573 }
 574 #else
 575 struct plat_stmmacenet_data *
 576 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 577 {
 578         return ERR_PTR(-EINVAL);
 579 }
 580
 581 void stmmac_remove_config_dt(struct platform_device *pdev,
 582                              struct plat_stmmacenet_data *plat)
 583 {
 584 }
 585 #endif /* CONFIG_OF */
 586 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
 587 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
 588
 589 int stmmac_get_platform_resources(struct platform_device *pdev,
 590                                   struct stmmac_resources *stmmac_res)
 591 {
 592         struct resource *res;
 593
 594         memset(stmmac_res, 0, sizeof(*stmmac_res));
 595
 596         /* Get IRQ information early to have an ability to ask for deferred
 597          * probe if needed before we went too far with resource allocation.
 598          */
 599         stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
 600         if (stmmac_res->irq < 0) {
 601                 if (stmmac_res->irq != -EPROBE_DEFER) {
 602                         dev_err(&pdev->dev,
 603                                 "MAC IRQ configuration information not found\n");
 604                 }
 605                 return stmmac_res->irq;
 606         }
 607
 608         /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 609          * The external wake up irq can be passed through the platform code
 610          * named as "eth_wake_irq"
 611          *
 612          * In case the wake up interrupt is not passed from the platform
 613          * so the driver will continue to use the mac irq (ndev->irq)
 614          */
 615         stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
 616         if (stmmac_res->wol_irq < 0) {
 617                 if (stmmac_res->wol_irq == -EPROBE_DEFER)
 618                         return -EPROBE_DEFER;
 619                 stmmac_res->wol_irq = stmmac_res->irq;
 620         }
 621
 622         stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
 623         if (stmmac_res->lpi_irq == -EPROBE_DEFER)
 624                 return -EPROBE_DEFER;
 625
 626         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 627         stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
 628
 629         return PTR_ERR_OR_ZERO(stmmac_res->addr);
 630 }
 631 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
 632
 633 /**
 634  * stmmac_pltfr_remove
 635  * @pdev: platform device pointer
 636  * Description: this function calls the main to free the net resources
 637  * and calls the platforms hook and release the resources (e.g. mem).
 638  */
 639 int stmmac_pltfr_remove(struct platform_device *pdev)
 640 {
 641         struct net_device *ndev = platform_get_drvdata(pdev);
 642         struct stmmac_priv *priv = netdev_priv(ndev);
 643         struct plat_stmmacenet_data *plat = priv->plat;
 644         int ret = stmmac_dvr_remove(&pdev->dev);
 645
 646         if (plat->exit)
 647                 plat->exit(pdev, plat->bsp_priv);
 648
 649         stmmac_remove_config_dt(pdev, plat);
 650
 651         return ret;
 652 }
 653 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
 654
 655 #ifdef CONFIG_PM_SLEEP
 656 /**
 657  * stmmac_pltfr_suspend
 658  * @dev: device pointer
 659  * Description: this function is invoked when suspend the driver and it direcly
 660  * call the main suspend function and then, if required, on some platform, it
 661  * can call an exit helper.
 662  */
 663 static int stmmac_pltfr_suspend(struct device *dev)
 664 {
 665         int ret;
 666         struct net_device *ndev = dev_get_drvdata(dev);
 667         struct stmmac_priv *priv = netdev_priv(ndev);
 668         struct platform_device *pdev = to_platform_device(dev);
 669
 670         ret = stmmac_suspend(dev);
 671         if (priv->plat->exit)
 672                 priv->plat->exit(pdev, priv->plat->bsp_priv);
 673
 674         return ret;
 675 }
 676
 677 /**
 678  * stmmac_pltfr_resume
 679  * @dev: device pointer
 680  * Description: this function is invoked when resume the driver before calling
 681  * the main resume function, on some platforms, it can call own init helper
 682  * if required.
 683  */
 684 static int stmmac_pltfr_resume(struct device *dev)
 685 {
 686         struct net_device *ndev = dev_get_drvdata(dev);
 687         struct stmmac_priv *priv = netdev_priv(ndev);
 688         struct platform_device *pdev = to_platform_device(dev);
 689
 690         if (priv->plat->init)
 691                 priv->plat->init(pdev, priv->plat->bsp_priv);
 692
 693         return stmmac_resume(dev);
 694 }
 695 #endif /* CONFIG_PM_SLEEP */
 696
 697 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
 698                                        stmmac_pltfr_resume);
 699 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
 700
 701 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
 702 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 703 MODULE_LICENSE("GPL");