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 ... 32:
  81         case 64:
  82         case 128:
  83                 break;
  84         default:
  85                 x = 1;
  86                 pr_info("Unicast table entries set to unexpected value %d\n",
  87                         ucast_entries);
  88                 break;
  89         }
  90         return x;
  91 }
  92
  93 /**
  94  * stmmac_axi_setup - parse DT parameters for programming the AXI register
  95  * @pdev: platform device
  96  * @priv: driver private struct.
  97  * Description:
  98  * if required, from device-tree the AXI internal register can be tuned
  99  * by using platform parameters.
 100  */
 101 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
 102 {
 103         struct device_node *np;
 104         struct stmmac_axi *axi;
 105
 106         np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
 107         if (!np)
 108                 return NULL;
 109
 110         axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
 111         if (!axi) {
 112                 of_node_put(np);
 113                 return ERR_PTR(-ENOMEM);
 114         }
 115
 116         axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
 117         axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
 118         axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
 119         axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
 120         axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
 121         axi->axi_rb =  of_property_read_bool(np, "snps,axi_rb");
 122
 123         if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
 124                 axi->axi_wr_osr_lmt = 1;
 125         if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
 126                 axi->axi_rd_osr_lmt = 1;
 127         of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
 128         of_node_put(np);
 129
 130         return axi;
 131 }
 132
 133 /**
 134  * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
 135  * @pdev: platform device
 136  */
 137 static void stmmac_mtl_setup(struct platform_device *pdev,
 138                              struct plat_stmmacenet_data *plat)
 139 {
 140         struct device_node *q_node;
 141         struct device_node *rx_node;
 142         struct device_node *tx_node;
 143         u8 queue = 0;
 144
 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.
 148          */
 149         plat->rx_queues_to_use = 1;
 150         plat->tx_queues_to_use = 1;
 151
 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).
 155          */
 156         plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 157         plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 158
 159         rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
 160         if (!rx_node)
 161                 return;
 162
 163         tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
 164         if (!tx_node) {
 165                 of_node_put(rx_node);
 166                 return;
 167         }
 168
 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;
 173
 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;
 178         else
 179                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 180
 181         /* Processing individual RX queue config */
 182         for_each_child_of_node(rx_node, q_node) {
 183                 if (queue >= plat->rx_queues_to_use)
 184                         break;
 185
 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;
 190                 else
 191                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 192
 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 */
 197
 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;
 202                 } else {
 203                         plat->rx_queues_cfg[queue].use_prio = true;
 204                 }
 205
 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;
 217                 else
 218                         plat->rx_queues_cfg[queue].pkt_route = 0x0;
 219
 220                 queue++;
 221         }
 222
 223         /* Processing TX queues common config */
 224         if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
 225                                  &plat->tx_queues_to_use))
 226                 plat->tx_queues_to_use = 1;
 227
 228         if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
 229                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
 230         else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
 231                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
 232         else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
 233                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
 234         else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
 235                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 236         else
 237                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 238
 239         queue = 0;
 240
 241         /* Processing individual TX queue config */
 242         for_each_child_of_node(tx_node, q_node) {
 243                 if (queue >= plat->tx_queues_to_use)
 244                         break;
 245
 246                 if (of_property_read_u32(q_node, "snps,weight",
 247                                          &plat->tx_queues_cfg[queue].weight))
 248                         plat->tx_queues_cfg[queue].weight = 0x10 + queue;
 249
 250                 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
 251                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 252                 } else if (of_property_read_bool(q_node,
 253                                                  "snps,avb-algorithm")) {
 254                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 255
 256                         /* Credit Base Shaper parameters used by AVB */
 257                         if (of_property_read_u32(q_node, "snps,send_slope",
 258                                 &plat->tx_queues_cfg[queue].send_slope))
 259                                 plat->tx_queues_cfg[queue].send_slope = 0x0;
 260                         if (of_property_read_u32(q_node, "snps,idle_slope",
 261                                 &plat->tx_queues_cfg[queue].idle_slope))
 262                                 plat->tx_queues_cfg[queue].idle_slope = 0x0;
 263                         if (of_property_read_u32(q_node, "snps,high_credit",
 264                                 &plat->tx_queues_cfg[queue].high_credit))
 265                                 plat->tx_queues_cfg[queue].high_credit = 0x0;
 266                         if (of_property_read_u32(q_node, "snps,low_credit",
 267                                 &plat->tx_queues_cfg[queue].low_credit))
 268                                 plat->tx_queues_cfg[queue].low_credit = 0x0;
 269                 } else {
 270                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 271                 }
 272
 273                 if (of_property_read_u32(q_node, "snps,priority",
 274                                         &plat->tx_queues_cfg[queue].prio)) {
 275                         plat->tx_queues_cfg[queue].prio = 0;
 276                         plat->tx_queues_cfg[queue].use_prio = false;
 277                 } else {
 278                         plat->tx_queues_cfg[queue].use_prio = true;
 279                 }
 280
 281                 queue++;
 282         }
 283
 284         of_node_put(rx_node);
 285         of_node_put(tx_node);
 286         of_node_put(q_node);
 287 }
 288
 289 /**
 290  * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
 291  * @plat: driver data platform structure
 292  * @np: device tree node
 293  * @dev: device pointer
 294  * Description:
 295  * The mdio bus will be allocated in case of a phy transceiver is on board;
 296  * it will be NULL if the fixed-link is configured.
 297  * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
 298  * in any case (for DSA, mdio must be registered even if fixed-link).
 299  * The table below sums the supported configurations:
 300  *      -------------------------------
 301  *      snps,phy-addr   |     Y
 302  *      -------------------------------
 303  *      phy-handle      |     Y
 304  *      -------------------------------
 305  *      fixed-link      |     N
 306  *      -------------------------------
 307  *      snps,dwmac-mdio |
 308  *        even if       |     Y
 309  *      fixed-link      |
 310  *      -------------------------------
 311  *
 312  * It returns 0 in case of success otherwise -ENODEV.
 313  */
 314 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
 315                          struct device_node *np, struct device *dev)
 316 {
 317         bool mdio = true;
 318         static const struct of_device_id need_mdio_ids[] = {
 319                 { .compatible = "snps,dwc-qos-ethernet-4.10" },
 320                 { .compatible = "allwinner,sun8i-a83t-emac" },
 321                 { .compatible = "allwinner,sun8i-h3-emac" },
 322                 { .compatible = "allwinner,sun8i-v3s-emac" },
 323                 { .compatible = "allwinner,sun50i-a64-emac" },
 324                 {},
 325         };
 326
 327         /* If phy-handle property is passed from DT, use it as the PHY */
 328         plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
 329         if (plat->phy_node)
 330                 dev_dbg(dev, "Found phy-handle subnode\n");
 331
 332         /* If phy-handle is not specified, check if we have a fixed-phy */
 333         if (!plat->phy_node && of_phy_is_fixed_link(np)) {
 334                 if ((of_phy_register_fixed_link(np) < 0))
 335                         return -ENODEV;
 336
 337                 dev_dbg(dev, "Found fixed-link subnode\n");
 338                 plat->phy_node = of_node_get(np);
 339                 mdio = false;
 340         }
 341
 342         if (of_match_node(need_mdio_ids, np)) {
 343                 plat->mdio_node = of_get_child_by_name(np, "mdio");
 344         } else {
 345                 /**
 346                  * If snps,dwmac-mdio is passed from DT, always register
 347                  * the MDIO
 348                  */
 349                 for_each_child_of_node(np, plat->mdio_node) {
 350                         if (of_device_is_compatible(plat->mdio_node,
 351                                                     "snps,dwmac-mdio"))
 352                                 break;
 353                 }
 354         }
 355
 356         if (plat->mdio_node) {
 357                 dev_dbg(dev, "Found MDIO subnode\n");
 358                 mdio = true;
 359         }
 360
 361         if (mdio)
 362                 plat->mdio_bus_data =
 363                         devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
 364                                      GFP_KERNEL);
 365         return 0;
 366 }
 367
 368 /**
 369  * stmmac_probe_config_dt - parse device-tree driver parameters
 370  * @pdev: platform_device structure
 371  * @mac: MAC address to use
 372  * Description:
 373  * this function is to read the driver parameters from device-tree and
 374  * set some private fields that will be used by the main at runtime.
 375  */
 376 struct plat_stmmacenet_data *
 377 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 378 {
 379         struct device_node *np = pdev->dev.of_node;
 380         struct plat_stmmacenet_data *plat;
 381         struct stmmac_dma_cfg *dma_cfg;
 382
 383         plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
 384         if (!plat)
 385                 return ERR_PTR(-ENOMEM);
 386
 387         *mac = of_get_mac_address(np);
 388         plat->interface = of_get_phy_mode(np);
 389
 390         /* Get max speed of operation from device tree */
 391         of_property_read_u32(np, "max-speed", &plat->max_speed);
 392
 393         plat->bus_id = of_alias_get_id(np, "ethernet");
 394         if (plat->bus_id < 0)
 395                 plat->bus_id = 0;
 396
 397         /* Default to phy auto-detection */
 398         plat->phy_addr = -1;
 399
 400         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
 401          * and warn of its use. Remove this when phy node support is added.
 402          */
 403         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
 404                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
 405
 406         /* To Configure PHY by using all device-tree supported properties */
 407         if (stmmac_dt_phy(plat, np, &pdev->dev))
 408                 return ERR_PTR(-ENODEV);
 409
 410         of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
 411
 412         of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
 413
 414         plat->force_sf_dma_mode =
 415                 of_property_read_bool(np, "snps,force_sf_dma_mode");
 416
 417         plat->en_tx_lpi_clockgating =
 418                 of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
 419
 420         /* Set the maxmtu to a default of JUMBO_LEN in case the
 421          * parameter is not present in the device tree.
 422          */
 423         plat->maxmtu = JUMBO_LEN;
 424
 425         /* Set default value for multicast hash bins */
 426         plat->multicast_filter_bins = HASH_TABLE_SIZE;
 427
 428         /* Set default value for unicast filter entries */
 429         plat->unicast_filter_entries = 1;
 430
 431         /*
 432          * Currently only the properties needed on SPEAr600
 433          * are provided. All other properties should be added
 434          * once needed on other platforms.
 435          */
 436         if (of_device_is_compatible(np, "st,spear600-gmac") ||
 437                 of_device_is_compatible(np, "snps,dwmac-3.50a") ||
 438                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
 439                 of_device_is_compatible(np, "snps,dwmac")) {
 440                 /* Note that the max-frame-size parameter as defined in the
 441                  * ePAPR v1.1 spec is defined as max-frame-size, it's
 442                  * actually used as the IEEE definition of MAC Client
 443                  * data, or MTU. The ePAPR specification is confusing as
 444                  * the definition is max-frame-size, but usage examples
 445                  * are clearly MTUs
 446                  */
 447                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
 448                 of_property_read_u32(np, "snps,multicast-filter-bins",
 449                                      &plat->multicast_filter_bins);
 450                 of_property_read_u32(np, "snps,perfect-filter-entries",
 451                                      &plat->unicast_filter_entries);
 452                 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
 453                                                plat->unicast_filter_entries);
 454                 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
 455                                               plat->multicast_filter_bins);
 456                 plat->has_gmac = 1;
 457                 plat->pmt = 1;
 458         }
 459
 460         if (of_device_is_compatible(np, "snps,dwmac-3.40a")) {
 461                 plat->has_gmac = 1;
 462                 plat->enh_desc = 1;
 463                 plat->tx_coe = 1;
 464                 plat->bugged_jumbo = 1;
 465                 plat->pmt = 1;
 466         }
 467
 468         if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
 469             of_device_is_compatible(np, "snps,dwmac-4.10a")) {
 470                 plat->has_gmac4 = 1;
 471                 plat->has_gmac = 0;
 472                 plat->pmt = 1;
 473                 plat->tso_en = of_property_read_bool(np, "snps,tso");
 474         }
 475
 476         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
 477                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
 478                 plat->enh_desc = 1;
 479                 plat->bugged_jumbo = 1;
 480                 plat->force_sf_dma_mode = 1;
 481         }
 482
 483         dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
 484                                GFP_KERNEL);
 485         if (!dma_cfg) {
 486                 stmmac_remove_config_dt(pdev, plat);
 487                 return ERR_PTR(-ENOMEM);
 488         }
 489         plat->dma_cfg = dma_cfg;
 490
 491         of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
 492         if (!dma_cfg->pbl)
 493                 dma_cfg->pbl = DEFAULT_DMA_PBL;
 494         of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
 495         of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
 496         dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
 497
 498         dma_cfg->aal = of_property_read_bool(np, "snps,aal");
 499         dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
 500         dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
 501
 502         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
 503         if (plat->force_thresh_dma_mode) {
 504                 plat->force_sf_dma_mode = 0;
 505                 pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
 506         }
 507
 508         of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
 509
 510         plat->axi = stmmac_axi_setup(pdev);
 511
 512         stmmac_mtl_setup(pdev, plat);
 513
 514         /* clock setup */
 515         plat->stmmac_clk = devm_clk_get(&pdev->dev,
 516                                         STMMAC_RESOURCE_NAME);
 517         if (IS_ERR(plat->stmmac_clk)) {
 518                 dev_warn(&pdev->dev, "Cannot get CSR clock\n");
 519                 plat->stmmac_clk = NULL;
 520         }
 521         clk_prepare_enable(plat->stmmac_clk);
 522
 523         plat->pclk = devm_clk_get(&pdev->dev, "pclk");
 524         if (IS_ERR(plat->pclk)) {
 525                 if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
 526                         goto error_pclk_get;
 527
 528                 plat->pclk = NULL;
 529         }
 530         clk_prepare_enable(plat->pclk);
 531
 532         /* Fall-back to main clock in case of no PTP ref is passed */
 533         plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
 534         if (IS_ERR(plat->clk_ptp_ref)) {
 535                 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
 536                 plat->clk_ptp_ref = NULL;
 537                 dev_warn(&pdev->dev, "PTP uses main clock\n");
 538         } else {
 539                 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
 540                 dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
 541         }
 542
 543         plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
 544                                                   STMMAC_RESOURCE_NAME);
 545         if (IS_ERR(plat->stmmac_rst)) {
 546                 if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
 547                         goto error_hw_init;
 548
 549                 dev_info(&pdev->dev, "no reset control found\n");
 550                 plat->stmmac_rst = NULL;
 551         }
 552
 553         return plat;
 554
 555 error_hw_init:
 556         clk_disable_unprepare(plat->pclk);
 557 error_pclk_get:
 558         clk_disable_unprepare(plat->stmmac_clk);
 559
 560         return ERR_PTR(-EPROBE_DEFER);
 561 }
 562
 563 /**
 564  * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
 565  * @pdev: platform_device structure
 566  * @plat: driver data platform structure
 567  *
 568  * Release resources claimed by stmmac_probe_config_dt().
 569  */
 570 void stmmac_remove_config_dt(struct platform_device *pdev,
 571                              struct plat_stmmacenet_data *plat)
 572 {
 573         struct device_node *np = pdev->dev.of_node;
 574
 575         if (of_phy_is_fixed_link(np))
 576                 of_phy_deregister_fixed_link(np);
 577         of_node_put(plat->phy_node);
 578         of_node_put(plat->mdio_node);
 579 }
 580 #else
 581 struct plat_stmmacenet_data *
 582 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 583 {
 584         return ERR_PTR(-EINVAL);
 585 }
 586
 587 void stmmac_remove_config_dt(struct platform_device *pdev,
 588                              struct plat_stmmacenet_data *plat)
 589 {
 590 }
 591 #endif /* CONFIG_OF */
 592 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
 593 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
 594
 595 int stmmac_get_platform_resources(struct platform_device *pdev,
 596                                   struct stmmac_resources *stmmac_res)
 597 {
 598         struct resource *res;
 599
 600         memset(stmmac_res, 0, sizeof(*stmmac_res));
 601
 602         /* Get IRQ information early to have an ability to ask for deferred
 603          * probe if needed before we went too far with resource allocation.
 604          */
 605         stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
 606         if (stmmac_res->irq < 0) {
 607                 if (stmmac_res->irq != -EPROBE_DEFER) {
 608                         dev_err(&pdev->dev,
 609                                 "MAC IRQ configuration information not found\n");
 610                 }
 611                 return stmmac_res->irq;
 612         }
 613
 614         /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 615          * The external wake up irq can be passed through the platform code
 616          * named as "eth_wake_irq"
 617          *
 618          * In case the wake up interrupt is not passed from the platform
 619          * so the driver will continue to use the mac irq (ndev->irq)
 620          */
 621         stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
 622         if (stmmac_res->wol_irq < 0) {
 623                 if (stmmac_res->wol_irq == -EPROBE_DEFER)
 624                         return -EPROBE_DEFER;
 625                 stmmac_res->wol_irq = stmmac_res->irq;
 626         }
 627
 628         stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
 629         if (stmmac_res->lpi_irq == -EPROBE_DEFER)
 630                 return -EPROBE_DEFER;
 631
 632         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 633         stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
 634
 635         return PTR_ERR_OR_ZERO(stmmac_res->addr);
 636 }
 637 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
 638
 639 /**
 640  * stmmac_pltfr_remove
 641  * @pdev: platform device pointer
 642  * Description: this function calls the main to free the net resources
 643  * and calls the platforms hook and release the resources (e.g. mem).
 644  */
 645 int stmmac_pltfr_remove(struct platform_device *pdev)
 646 {
 647         struct net_device *ndev = platform_get_drvdata(pdev);
 648         struct stmmac_priv *priv = netdev_priv(ndev);
 649         struct plat_stmmacenet_data *plat = priv->plat;
 650         int ret = stmmac_dvr_remove(&pdev->dev);
 651
 652         if (plat->exit)
 653                 plat->exit(pdev, plat->bsp_priv);
 654
 655         stmmac_remove_config_dt(pdev, plat);
 656
 657         return ret;
 658 }
 659 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
 660
 661 #ifdef CONFIG_PM_SLEEP
 662 /**
 663  * stmmac_pltfr_suspend
 664  * @dev: device pointer
 665  * Description: this function is invoked when suspend the driver and it direcly
 666  * call the main suspend function and then, if required, on some platform, it
 667  * can call an exit helper.
 668  */
 669 static int stmmac_pltfr_suspend(struct device *dev)
 670 {
 671         int ret;
 672         struct net_device *ndev = dev_get_drvdata(dev);
 673         struct stmmac_priv *priv = netdev_priv(ndev);
 674         struct platform_device *pdev = to_platform_device(dev);
 675
 676         ret = stmmac_suspend(dev);
 677         if (priv->plat->exit)
 678                 priv->plat->exit(pdev, priv->plat->bsp_priv);
 679
 680         return ret;
 681 }
 682
 683 /**
 684  * stmmac_pltfr_resume
 685  * @dev: device pointer
 686  * Description: this function is invoked when resume the driver before calling
 687  * the main resume function, on some platforms, it can call own init helper
 688  * if required.
 689  */
 690 static int stmmac_pltfr_resume(struct device *dev)
 691 {
 692         struct net_device *ndev = dev_get_drvdata(dev);
 693         struct stmmac_priv *priv = netdev_priv(ndev);
 694         struct platform_device *pdev = to_platform_device(dev);
 695
 696         if (priv->plat->init)
 697                 priv->plat->init(pdev, priv->plat->bsp_priv);
 698
 699         return stmmac_resume(dev);
 700 }
 701 #endif /* CONFIG_PM_SLEEP */
 702
 703 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
 704                                        stmmac_pltfr_resume);
 705 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
 706
 707 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
 708 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 709 MODULE_LICENSE("GPL");