drivers/net/ethernet/stmicro/stmmac/stmmac

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
dwmac1000_validate_mcast_bins
dwmac1000_validate_ucast_entries
stmmac_axi_setup
stmmac_mtl_setup
stmmac_dt_phy
stmmac_of_get_mac_mode
stmmac_probe_config_dt
stmmac_remove_config_dt
stmmac_probe_config_dt
stmmac_remove_config_dt
stmmac_get_platform_resources
stmmac_pltfr_remove
stmmac_pltfr_suspend
stmmac_pltfr_resume
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*******************************************************************************
   3   This contains the functions to handle the platform driver.
   4 
   5   Copyright (C) 2007-2011  STMicroelectronics Ltd
   6 
   7 
   8   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
   9 *******************************************************************************/
  10 
  11 #include <linux/platform_device.h>
  12 #include <linux/module.h>
  13 #include <linux/io.h>
  14 #include <linux/of.h>
  15 #include <linux/of_net.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_mdio.h>
  18 
  19 #include "stmmac.h"
  20 #include "stmmac_platform.h"
  21 
  22 #ifdef CONFIG_OF
  23 
  24 /**
  25  * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
  26  * @dev: struct device of the platform device
  27  * @mcast_bins: Multicast filtering bins
  28  * Description:
  29  * this function validates the number of Multicast filtering bins specified
  30  * by the configuration through the device tree. The Synopsys GMAC supports
  31  * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
  32  * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
  33  * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
  34  * invalid and will cause the filtering algorithm to use Multicast
  35  * promiscuous mode.
  36  */
  37 static int dwmac1000_validate_mcast_bins(struct device *dev, int mcast_bins)
  38 {
  39         int x = mcast_bins;
  40 
  41         switch (x) {
  42         case HASH_TABLE_SIZE:
  43         case 128:
  44         case 256:
  45                 break;
  46         default:
  47                 x = 0;
  48                 dev_info(dev, "Hash table entries set to unexpected value %d\n",
  49                          mcast_bins);
  50                 break;
  51         }
  52         return x;
  53 }
  54 
  55 /**
  56  * dwmac1000_validate_ucast_entries - validate the Unicast address entries
  57  * @dev: struct device of the platform device
  58  * @ucast_entries: number of Unicast address entries
  59  * Description:
  60  * This function validates the number of Unicast address entries supported
  61  * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
  62  * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
  63  * logic. This function validates a valid, supported configuration is
  64  * selected, and defaults to 1 Unicast address if an unsupported
  65  * configuration is selected.
  66  */
  67 static int dwmac1000_validate_ucast_entries(struct device *dev,
  68                                             int ucast_entries)
  69 {
  70         int x = ucast_entries;
  71 
  72         switch (x) {
  73         case 1 ... 32:
  74         case 64:
  75         case 128:
  76                 break;
  77         default:
  78                 x = 1;
  79                 dev_info(dev, "Unicast table entries set to unexpected value %d\n",
  80                          ucast_entries);
  81                 break;
  82         }
  83         return x;
  84 }
  85 
  86 /**
  87  * stmmac_axi_setup - parse DT parameters for programming the AXI register
  88  * @pdev: platform device
  89  * Description:
  90  * if required, from device-tree the AXI internal register can be tuned
  91  * by using platform parameters.
  92  */
  93 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
  94 {
  95         struct device_node *np;
  96         struct stmmac_axi *axi;
  97 
  98         np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
  99         if (!np)
 100                 return NULL;
 101 
 102         axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
 103         if (!axi) {
 104                 of_node_put(np);
 105                 return ERR_PTR(-ENOMEM);
 106         }
 107 
 108         axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
 109         axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
 110         axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe");
 111         axi->axi_fb = of_property_read_bool(np, "snps,axi_fb");
 112         axi->axi_mb = of_property_read_bool(np, "snps,axi_mb");
 113         axi->axi_rb =  of_property_read_bool(np, "snps,axi_rb");
 114 
 115         if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
 116                 axi->axi_wr_osr_lmt = 1;
 117         if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
 118                 axi->axi_rd_osr_lmt = 1;
 119         of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
 120         of_node_put(np);
 121 
 122         return axi;
 123 }
 124 
 125 /**
 126  * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
 127  * @pdev: platform device
 128  */
 129 static int stmmac_mtl_setup(struct platform_device *pdev,
 130                             struct plat_stmmacenet_data *plat)
 131 {
 132         struct device_node *q_node;
 133         struct device_node *rx_node;
 134         struct device_node *tx_node;
 135         u8 queue = 0;
 136         int ret = 0;
 137 
 138         /* For backwards-compatibility with device trees that don't have any
 139          * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
 140          * to one RX and TX queues each.
 141          */
 142         plat->rx_queues_to_use = 1;
 143         plat->tx_queues_to_use = 1;
 144 
 145         /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
 146          * to always set this, otherwise Queue will be classified as AVB
 147          * (because MTL_QUEUE_AVB = 0).
 148          */
 149         plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 150         plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
 151 
 152         rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
 153         if (!rx_node)
 154                 return ret;
 155 
 156         tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
 157         if (!tx_node) {
 158                 of_node_put(rx_node);
 159                 return ret;
 160         }
 161 
 162         /* Processing RX queues common config */
 163         if (of_property_read_u32(rx_node, "snps,rx-queues-to-use",
 164                                  &plat->rx_queues_to_use))
 165                 plat->rx_queues_to_use = 1;
 166 
 167         if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
 168                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 169         else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
 170                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
 171         else
 172                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
 173 
 174         /* Processing individual RX queue config */
 175         for_each_child_of_node(rx_node, q_node) {
 176                 if (queue >= plat->rx_queues_to_use)
 177                         break;
 178 
 179                 if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
 180                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 181                 else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
 182                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 183                 else
 184                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 185 
 186                 if (of_property_read_u32(q_node, "snps,map-to-dma-channel",
 187                                          &plat->rx_queues_cfg[queue].chan))
 188                         plat->rx_queues_cfg[queue].chan = queue;
 189                 /* TODO: Dynamic mapping to be included in the future */
 190 
 191                 if (of_property_read_u32(q_node, "snps,priority",
 192                                         &plat->rx_queues_cfg[queue].prio)) {
 193                         plat->rx_queues_cfg[queue].prio = 0;
 194                         plat->rx_queues_cfg[queue].use_prio = false;
 195                 } else {
 196                         plat->rx_queues_cfg[queue].use_prio = true;
 197                 }
 198 
 199                 /* RX queue specific packet type routing */
 200                 if (of_property_read_bool(q_node, "snps,route-avcp"))
 201                         plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
 202                 else if (of_property_read_bool(q_node, "snps,route-ptp"))
 203                         plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
 204                 else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
 205                         plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
 206                 else if (of_property_read_bool(q_node, "snps,route-up"))
 207                         plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
 208                 else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
 209                         plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
 210                 else
 211                         plat->rx_queues_cfg[queue].pkt_route = 0x0;
 212 
 213                 queue++;
 214         }
 215         if (queue != plat->rx_queues_to_use) {
 216                 ret = -EINVAL;
 217                 dev_err(&pdev->dev, "Not all RX queues were configured\n");
 218                 goto out;
 219         }
 220 
 221         /* Processing TX queues common config */
 222         if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
 223                                  &plat->tx_queues_to_use))
 224                 plat->tx_queues_to_use = 1;
 225 
 226         if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
 227                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
 228         else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
 229                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
 230         else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
 231                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
 232         else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
 233                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 234         else
 235                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 236 
 237         queue = 0;
 238 
 239         /* Processing individual TX queue config */
 240         for_each_child_of_node(tx_node, q_node) {
 241                 if (queue >= plat->tx_queues_to_use)
 242                         break;
 243 
 244                 if (of_property_read_u32(q_node, "snps,weight",
 245                                          &plat->tx_queues_cfg[queue].weight))
 246                         plat->tx_queues_cfg[queue].weight = 0x10 + queue;
 247 
 248                 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
 249                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 250                 } else if (of_property_read_bool(q_node,
 251                                                  "snps,avb-algorithm")) {
 252                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 253 
 254                         /* Credit Base Shaper parameters used by AVB */
 255                         if (of_property_read_u32(q_node, "snps,send_slope",
 256                                 &plat->tx_queues_cfg[queue].send_slope))
 257                                 plat->tx_queues_cfg[queue].send_slope = 0x0;
 258                         if (of_property_read_u32(q_node, "snps,idle_slope",
 259                                 &plat->tx_queues_cfg[queue].idle_slope))
 260                                 plat->tx_queues_cfg[queue].idle_slope = 0x0;
 261                         if (of_property_read_u32(q_node, "snps,high_credit",
 262                                 &plat->tx_queues_cfg[queue].high_credit))
 263                                 plat->tx_queues_cfg[queue].high_credit = 0x0;
 264                         if (of_property_read_u32(q_node, "snps,low_credit",
 265                                 &plat->tx_queues_cfg[queue].low_credit))
 266                                 plat->tx_queues_cfg[queue].low_credit = 0x0;
 267                 } else {
 268                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 269                 }
 270 
 271                 if (of_property_read_u32(q_node, "snps,priority",
 272                                         &plat->tx_queues_cfg[queue].prio)) {
 273                         plat->tx_queues_cfg[queue].prio = 0;
 274                         plat->tx_queues_cfg[queue].use_prio = false;
 275                 } else {
 276                         plat->tx_queues_cfg[queue].use_prio = true;
 277                 }
 278 
 279                 queue++;
 280         }
 281         if (queue != plat->tx_queues_to_use) {
 282                 ret = -EINVAL;
 283                 dev_err(&pdev->dev, "Not all TX queues were configured\n");
 284                 goto out;
 285         }
 286 
 287 out:
 288         of_node_put(rx_node);
 289         of_node_put(tx_node);
 290         of_node_put(q_node);
 291 
 292         return ret;
 293 }
 294 
 295 /**
 296  * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
 297  * @plat: driver data platform structure
 298  * @np: device tree node
 299  * @dev: device pointer
 300  * Description:
 301  * The mdio bus will be allocated in case of a phy transceiver is on board;
 302  * it will be NULL if the fixed-link is configured.
 303  * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
 304  * in any case (for DSA, mdio must be registered even if fixed-link).
 305  * The table below sums the supported configurations:
 306  *      -------------------------------
 307  *      snps,phy-addr   |     Y
 308  *      -------------------------------
 309  *      phy-handle      |     Y
 310  *      -------------------------------
 311  *      fixed-link      |     N
 312  *      -------------------------------
 313  *      snps,dwmac-mdio |
 314  *        even if       |     Y
 315  *      fixed-link      |
 316  *      -------------------------------
 317  *
 318  * It returns 0 in case of success otherwise -ENODEV.
 319  */
 320 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
 321                          struct device_node *np, struct device *dev)
 322 {
 323         bool mdio = !of_phy_is_fixed_link(np);
 324         static const struct of_device_id need_mdio_ids[] = {
 325                 { .compatible = "snps,dwc-qos-ethernet-4.10" },
 326                 {},
 327         };
 328 
 329         if (of_match_node(need_mdio_ids, np)) {
 330                 plat->mdio_node = of_get_child_by_name(np, "mdio");
 331         } else {
 332                 /**
 333                  * If snps,dwmac-mdio is passed from DT, always register
 334                  * the MDIO
 335                  */
 336                 for_each_child_of_node(np, plat->mdio_node) {
 337                         if (of_device_is_compatible(plat->mdio_node,
 338                                                     "snps,dwmac-mdio"))
 339                                 break;
 340                 }
 341         }
 342 
 343         if (plat->mdio_node) {
 344                 dev_dbg(dev, "Found MDIO subnode\n");
 345                 mdio = true;
 346         }
 347 
 348         if (mdio) {
 349                 plat->mdio_bus_data =
 350                         devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
 351                                      GFP_KERNEL);
 352                 if (!plat->mdio_bus_data)
 353                         return -ENOMEM;
 354 
 355                 plat->mdio_bus_data->needs_reset = true;
 356         }
 357 
 358         return 0;
 359 }
 360 
 361 /**
 362  * stmmac_of_get_mac_mode - retrieves the interface of the MAC
 363  * @np - device-tree node
 364  * Description:
 365  * Similar to `of_get_phy_mode()`, this function will retrieve (from
 366  * the device-tree) the interface mode on the MAC side. This assumes
 367  * that there is mode converter in-between the MAC & PHY
 368  * (e.g. GMII-to-RGMII).
 369  */
 370 static int stmmac_of_get_mac_mode(struct device_node *np)
 371 {
 372         const char *pm;
 373         int err, i;
 374 
 375         err = of_property_read_string(np, "mac-mode", &pm);
 376         if (err < 0)
 377                 return err;
 378 
 379         for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
 380                 if (!strcasecmp(pm, phy_modes(i)))
 381                         return i;
 382         }
 383 
 384         return -ENODEV;
 385 }
 386 
 387 /**
 388  * stmmac_probe_config_dt - parse device-tree driver parameters
 389  * @pdev: platform_device structure
 390  * @mac: MAC address to use
 391  * Description:
 392  * this function is to read the driver parameters from device-tree and
 393  * set some private fields that will be used by the main at runtime.
 394  */
 395 struct plat_stmmacenet_data *
 396 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 397 {
 398         struct device_node *np = pdev->dev.of_node;
 399         struct plat_stmmacenet_data *plat;
 400         struct stmmac_dma_cfg *dma_cfg;
 401         int rc;
 402 
 403         plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
 404         if (!plat)
 405                 return ERR_PTR(-ENOMEM);
 406 
 407         *mac = of_get_mac_address(np);
 408         if (IS_ERR(*mac)) {
 409                 if (PTR_ERR(*mac) == -EPROBE_DEFER)
 410                         return ERR_CAST(*mac);
 411 
 412                 *mac = NULL;
 413         }
 414 
 415         plat->phy_interface = of_get_phy_mode(np);
 416         if (plat->phy_interface < 0)
 417                 return ERR_PTR(plat->phy_interface);
 418 
 419         plat->interface = stmmac_of_get_mac_mode(np);
 420         if (plat->interface < 0)
 421                 plat->interface = plat->phy_interface;
 422 
 423         /* Some wrapper drivers still rely on phy_node. Let's save it while
 424          * they are not converted to phylink. */
 425         plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
 426 
 427         /* PHYLINK automatically parses the phy-handle property */
 428         plat->phylink_node = np;
 429 
 430         /* Get max speed of operation from device tree */
 431         if (of_property_read_u32(np, "max-speed", &plat->max_speed))
 432                 plat->max_speed = -1;
 433 
 434         plat->bus_id = of_alias_get_id(np, "ethernet");
 435         if (plat->bus_id < 0)
 436                 plat->bus_id = 0;
 437 
 438         /* Default to phy auto-detection */
 439         plat->phy_addr = -1;
 440 
 441         /* Default to get clk_csr from stmmac_clk_crs_set(),
 442          * or get clk_csr from device tree.
 443          */
 444         plat->clk_csr = -1;
 445         of_property_read_u32(np, "clk_csr", &plat->clk_csr);
 446 
 447         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
 448          * and warn of its use. Remove this when phy node support is added.
 449          */
 450         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
 451                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
 452 
 453         /* To Configure PHY by using all device-tree supported properties */
 454         rc = stmmac_dt_phy(plat, np, &pdev->dev);
 455         if (rc)
 456                 return ERR_PTR(rc);
 457 
 458         of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
 459 
 460         of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
 461 
 462         plat->force_sf_dma_mode =
 463                 of_property_read_bool(np, "snps,force_sf_dma_mode");
 464 
 465         plat->en_tx_lpi_clockgating =
 466                 of_property_read_bool(np, "snps,en-tx-lpi-clockgating");
 467 
 468         /* Set the maxmtu to a default of JUMBO_LEN in case the
 469          * parameter is not present in the device tree.
 470          */
 471         plat->maxmtu = JUMBO_LEN;
 472 
 473         /* Set default value for multicast hash bins */
 474         plat->multicast_filter_bins = HASH_TABLE_SIZE;
 475 
 476         /* Set default value for unicast filter entries */
 477         plat->unicast_filter_entries = 1;
 478 
 479         /*
 480          * Currently only the properties needed on SPEAr600
 481          * are provided. All other properties should be added
 482          * once needed on other platforms.
 483          */
 484         if (of_device_is_compatible(np, "st,spear600-gmac") ||
 485                 of_device_is_compatible(np, "snps,dwmac-3.50a") ||
 486                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
 487                 of_device_is_compatible(np, "snps,dwmac")) {
 488                 /* Note that the max-frame-size parameter as defined in the
 489                  * ePAPR v1.1 spec is defined as max-frame-size, it's
 490                  * actually used as the IEEE definition of MAC Client
 491                  * data, or MTU. The ePAPR specification is confusing as
 492                  * the definition is max-frame-size, but usage examples
 493                  * are clearly MTUs
 494                  */
 495                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
 496                 of_property_read_u32(np, "snps,multicast-filter-bins",
 497                                      &plat->multicast_filter_bins);
 498                 of_property_read_u32(np, "snps,perfect-filter-entries",
 499                                      &plat->unicast_filter_entries);
 500                 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
 501                                 &pdev->dev, plat->unicast_filter_entries);
 502                 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
 503                                 &pdev->dev, plat->multicast_filter_bins);
 504                 plat->has_gmac = 1;
 505                 plat->pmt = 1;
 506         }
 507 
 508         if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
 509             of_device_is_compatible(np, "snps,dwmac-4.10a") ||
 510             of_device_is_compatible(np, "snps,dwmac-4.20a")) {
 511                 plat->has_gmac4 = 1;
 512                 plat->has_gmac = 0;
 513                 plat->pmt = 1;
 514                 plat->tso_en = of_property_read_bool(np, "snps,tso");
 515         }
 516 
 517         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
 518                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
 519                 plat->enh_desc = 1;
 520                 plat->bugged_jumbo = 1;
 521                 plat->force_sf_dma_mode = 1;
 522         }
 523 
 524         if (of_device_is_compatible(np, "snps,dwxgmac")) {
 525                 plat->has_xgmac = 1;
 526                 plat->pmt = 1;
 527                 plat->tso_en = of_property_read_bool(np, "snps,tso");
 528         }
 529 
 530         dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
 531                                GFP_KERNEL);
 532         if (!dma_cfg) {
 533                 stmmac_remove_config_dt(pdev, plat);
 534                 return ERR_PTR(-ENOMEM);
 535         }
 536         plat->dma_cfg = dma_cfg;
 537 
 538         of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
 539         if (!dma_cfg->pbl)
 540                 dma_cfg->pbl = DEFAULT_DMA_PBL;
 541         of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
 542         of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
 543         dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
 544 
 545         dma_cfg->aal = of_property_read_bool(np, "snps,aal");
 546         dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
 547         dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
 548 
 549         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
 550         if (plat->force_thresh_dma_mode) {
 551                 plat->force_sf_dma_mode = 0;
 552                 dev_warn(&pdev->dev,
 553                          "force_sf_dma_mode is ignored if force_thresh_dma_mode is set.\n");
 554         }
 555 
 556         of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
 557 
 558         plat->axi = stmmac_axi_setup(pdev);
 559 
 560         rc = stmmac_mtl_setup(pdev, plat);
 561         if (rc) {
 562                 stmmac_remove_config_dt(pdev, plat);
 563                 return ERR_PTR(rc);
 564         }
 565 
 566         /* clock setup */
 567         if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
 568                 plat->stmmac_clk = devm_clk_get(&pdev->dev,
 569                                                 STMMAC_RESOURCE_NAME);
 570                 if (IS_ERR(plat->stmmac_clk)) {
 571                         dev_warn(&pdev->dev, "Cannot get CSR clock\n");
 572                         plat->stmmac_clk = NULL;
 573                 }
 574                 clk_prepare_enable(plat->stmmac_clk);
 575         }
 576 
 577         plat->pclk = devm_clk_get(&pdev->dev, "pclk");
 578         if (IS_ERR(plat->pclk)) {
 579                 if (PTR_ERR(plat->pclk) == -EPROBE_DEFER)
 580                         goto error_pclk_get;
 581 
 582                 plat->pclk = NULL;
 583         }
 584         clk_prepare_enable(plat->pclk);
 585 
 586         /* Fall-back to main clock in case of no PTP ref is passed */
 587         plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
 588         if (IS_ERR(plat->clk_ptp_ref)) {
 589                 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
 590                 plat->clk_ptp_ref = NULL;
 591                 dev_warn(&pdev->dev, "PTP uses main clock\n");
 592         } else {
 593                 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
 594                 dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
 595         }
 596 
 597         plat->stmmac_rst = devm_reset_control_get(&pdev->dev,
 598                                                   STMMAC_RESOURCE_NAME);
 599         if (IS_ERR(plat->stmmac_rst)) {
 600                 if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER)
 601                         goto error_hw_init;
 602 
 603                 dev_info(&pdev->dev, "no reset control found\n");
 604                 plat->stmmac_rst = NULL;
 605         }
 606 
 607         return plat;
 608 
 609 error_hw_init:
 610         clk_disable_unprepare(plat->pclk);
 611 error_pclk_get:
 612         clk_disable_unprepare(plat->stmmac_clk);
 613 
 614         return ERR_PTR(-EPROBE_DEFER);
 615 }
 616 
 617 /**
 618  * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
 619  * @pdev: platform_device structure
 620  * @plat: driver data platform structure
 621  *
 622  * Release resources claimed by stmmac_probe_config_dt().
 623  */
 624 void stmmac_remove_config_dt(struct platform_device *pdev,
 625                              struct plat_stmmacenet_data *plat)
 626 {
 627         of_node_put(plat->phy_node);
 628         of_node_put(plat->mdio_node);
 629 }
 630 #else
 631 struct plat_stmmacenet_data *
 632 stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 633 {
 634         return ERR_PTR(-EINVAL);
 635 }
 636 
 637 void stmmac_remove_config_dt(struct platform_device *pdev,
 638                              struct plat_stmmacenet_data *plat)
 639 {
 640 }
 641 #endif /* CONFIG_OF */
 642 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
 643 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
 644 
 645 int stmmac_get_platform_resources(struct platform_device *pdev,
 646                                   struct stmmac_resources *stmmac_res)
 647 {
 648         struct resource *res;
 649 
 650         memset(stmmac_res, 0, sizeof(*stmmac_res));
 651 
 652         /* Get IRQ information early to have an ability to ask for deferred
 653          * probe if needed before we went too far with resource allocation.
 654          */
 655         stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
 656         if (stmmac_res->irq < 0)
 657                 return stmmac_res->irq;
 658 
 659         /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
 660          * The external wake up irq can be passed through the platform code
 661          * named as "eth_wake_irq"
 662          *
 663          * In case the wake up interrupt is not passed from the platform
 664          * so the driver will continue to use the mac irq (ndev->irq)
 665          */
 666         stmmac_res->wol_irq =
 667                 platform_get_irq_byname_optional(pdev, "eth_wake_irq");
 668         if (stmmac_res->wol_irq < 0) {
 669                 if (stmmac_res->wol_irq == -EPROBE_DEFER)
 670                         return -EPROBE_DEFER;
 671                 dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n");
 672                 stmmac_res->wol_irq = stmmac_res->irq;
 673         }
 674 
 675         stmmac_res->lpi_irq =
 676                 platform_get_irq_byname_optional(pdev, "eth_lpi");
 677         if (stmmac_res->lpi_irq < 0) {
 678                 if (stmmac_res->lpi_irq == -EPROBE_DEFER)
 679                         return -EPROBE_DEFER;
 680                 dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
 681         }
 682 
 683         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 684         stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
 685 
 686         return PTR_ERR_OR_ZERO(stmmac_res->addr);
 687 }
 688 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
 689 
 690 /**
 691  * stmmac_pltfr_remove
 692  * @pdev: platform device pointer
 693  * Description: this function calls the main to free the net resources
 694  * and calls the platforms hook and release the resources (e.g. mem).
 695  */
 696 int stmmac_pltfr_remove(struct platform_device *pdev)
 697 {
 698         struct net_device *ndev = platform_get_drvdata(pdev);
 699         struct stmmac_priv *priv = netdev_priv(ndev);
 700         struct plat_stmmacenet_data *plat = priv->plat;
 701         int ret = stmmac_dvr_remove(&pdev->dev);
 702 
 703         if (plat->exit)
 704                 plat->exit(pdev, plat->bsp_priv);
 705 
 706         stmmac_remove_config_dt(pdev, plat);
 707 
 708         return ret;
 709 }
 710 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
 711 
 712 #ifdef CONFIG_PM_SLEEP
 713 /**
 714  * stmmac_pltfr_suspend
 715  * @dev: device pointer
 716  * Description: this function is invoked when suspend the driver and it direcly
 717  * call the main suspend function and then, if required, on some platform, it
 718  * can call an exit helper.
 719  */
 720 static int stmmac_pltfr_suspend(struct device *dev)
 721 {
 722         int ret;
 723         struct net_device *ndev = dev_get_drvdata(dev);
 724         struct stmmac_priv *priv = netdev_priv(ndev);
 725         struct platform_device *pdev = to_platform_device(dev);
 726 
 727         ret = stmmac_suspend(dev);
 728         if (priv->plat->exit)
 729                 priv->plat->exit(pdev, priv->plat->bsp_priv);
 730 
 731         return ret;
 732 }
 733 
 734 /**
 735  * stmmac_pltfr_resume
 736  * @dev: device pointer
 737  * Description: this function is invoked when resume the driver before calling
 738  * the main resume function, on some platforms, it can call own init helper
 739  * if required.
 740  */
 741 static int stmmac_pltfr_resume(struct device *dev)
 742 {
 743         struct net_device *ndev = dev_get_drvdata(dev);
 744         struct stmmac_priv *priv = netdev_priv(ndev);
 745         struct platform_device *pdev = to_platform_device(dev);
 746 
 747         if (priv->plat->init)
 748                 priv->plat->init(pdev, priv->plat->bsp_priv);
 749 
 750         return stmmac_resume(dev);
 751 }
 752 #endif /* CONFIG_PM_SLEEP */
 753 
 754 SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
 755                                        stmmac_pltfr_resume);
 756 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
 757 
 758 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
 759 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 760 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

DEFINITIONS
