uboot/drivers/net/phy/phy.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Generic PHY Management code
   4 *
   5 * Copyright 2011 Freescale Semiconductor, Inc.
   6 * author Andy Fleming
   7 *
   8 * Based loosely off of Linux's PHY Lib
   9 */
  10#include <common.h>
  11#include <console.h>
  12#include <dm.h>
  13#include <log.h>
  14#include <malloc.h>
  15#include <net.h>
  16#include <command.h>
  17#include <miiphy.h>
  18#include <phy.h>
  19#include <errno.h>
  20#include <linux/bitops.h>
  21#include <linux/delay.h>
  22#include <linux/err.h>
  23#include <linux/compiler.h>
  24
  25DECLARE_GLOBAL_DATA_PTR;
  26
  27/* Generic PHY support and helper functions */
  28
  29/**
  30 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
  31 * @phydev: target phy_device struct
  32 *
  33 * Description: Writes MII_ADVERTISE with the appropriate values,
  34 *   after sanitizing the values to make sure we only advertise
  35 *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
  36 *   hasn't changed, and > 0 if it has changed.
  37 */
  38static int genphy_config_advert(struct phy_device *phydev)
  39{
  40        u32 advertise;
  41        int oldadv, adv, bmsr;
  42        int err, changed = 0;
  43
  44        /* Only allow advertising what this PHY supports */
  45        phydev->advertising &= phydev->supported;
  46        advertise = phydev->advertising;
  47
  48        /* Setup standard advertisement */
  49        adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
  50        oldadv = adv;
  51
  52        if (adv < 0)
  53                return adv;
  54
  55        adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
  56                 ADVERTISE_PAUSE_ASYM);
  57        if (advertise & ADVERTISED_10baseT_Half)
  58                adv |= ADVERTISE_10HALF;
  59        if (advertise & ADVERTISED_10baseT_Full)
  60                adv |= ADVERTISE_10FULL;
  61        if (advertise & ADVERTISED_100baseT_Half)
  62                adv |= ADVERTISE_100HALF;
  63        if (advertise & ADVERTISED_100baseT_Full)
  64                adv |= ADVERTISE_100FULL;
  65        if (advertise & ADVERTISED_Pause)
  66                adv |= ADVERTISE_PAUSE_CAP;
  67        if (advertise & ADVERTISED_Asym_Pause)
  68                adv |= ADVERTISE_PAUSE_ASYM;
  69        if (advertise & ADVERTISED_1000baseX_Half)
  70                adv |= ADVERTISE_1000XHALF;
  71        if (advertise & ADVERTISED_1000baseX_Full)
  72                adv |= ADVERTISE_1000XFULL;
  73
  74        if (adv != oldadv) {
  75                err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
  76
  77                if (err < 0)
  78                        return err;
  79                changed = 1;
  80        }
  81
  82        bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
  83        if (bmsr < 0)
  84                return bmsr;
  85
  86        /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
  87         * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
  88         * logical 1.
  89         */
  90        if (!(bmsr & BMSR_ESTATEN))
  91                return changed;
  92
  93        /* Configure gigabit if it's supported */
  94        adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
  95        oldadv = adv;
  96
  97        if (adv < 0)
  98                return adv;
  99
 100        adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
 101
 102        if (phydev->supported & (SUPPORTED_1000baseT_Half |
 103                                SUPPORTED_1000baseT_Full)) {
 104                if (advertise & SUPPORTED_1000baseT_Half)
 105                        adv |= ADVERTISE_1000HALF;
 106                if (advertise & SUPPORTED_1000baseT_Full)
 107                        adv |= ADVERTISE_1000FULL;
 108        }
 109
 110        if (adv != oldadv)
 111                changed = 1;
 112
 113        err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
 114        if (err < 0)
 115                return err;
 116
 117        return changed;
 118}
 119
 120/**
 121 * genphy_setup_forced - configures/forces speed/duplex from @phydev
 122 * @phydev: target phy_device struct
 123 *
 124 * Description: Configures MII_BMCR to force speed/duplex
 125 *   to the values in phydev. Assumes that the values are valid.
 126 */
 127static int genphy_setup_forced(struct phy_device *phydev)
 128{
 129        int err;
 130        int ctl = BMCR_ANRESTART;
 131
 132        phydev->pause = 0;
 133        phydev->asym_pause = 0;
 134
 135        if (phydev->speed == SPEED_1000)
 136                ctl |= BMCR_SPEED1000;
 137        else if (phydev->speed == SPEED_100)
 138                ctl |= BMCR_SPEED100;
 139
 140        if (phydev->duplex == DUPLEX_FULL)
 141                ctl |= BMCR_FULLDPLX;
 142
 143        err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 144
 145        return err;
 146}
 147
 148/**
 149 * genphy_restart_aneg - Enable and Restart Autonegotiation
 150 * @phydev: target phy_device struct
 151 */
 152int genphy_restart_aneg(struct phy_device *phydev)
 153{
 154        int ctl;
 155
 156        ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 157
 158        if (ctl < 0)
 159                return ctl;
 160
 161        ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
 162
 163        /* Don't isolate the PHY if we're negotiating */
 164        ctl &= ~(BMCR_ISOLATE);
 165
 166        ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
 167
 168        return ctl;
 169}
 170
 171/**
 172 * genphy_config_aneg - restart auto-negotiation or write BMCR
 173 * @phydev: target phy_device struct
 174 *
 175 * Description: If auto-negotiation is enabled, we configure the
 176 *   advertising, and then restart auto-negotiation.  If it is not
 177 *   enabled, then we write the BMCR.
 178 */
 179int genphy_config_aneg(struct phy_device *phydev)
 180{
 181        int result;
 182
 183        if (phydev->autoneg != AUTONEG_ENABLE)
 184                return genphy_setup_forced(phydev);
 185
 186        result = genphy_config_advert(phydev);
 187
 188        if (result < 0) /* error */
 189                return result;
 190
 191        if (result == 0) {
 192                /*
 193                 * Advertisment hasn't changed, but maybe aneg was never on to
 194                 * begin with?  Or maybe phy was isolated?
 195                 */
 196                int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 197
 198                if (ctl < 0)
 199                        return ctl;
 200
 201                if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
 202                        result = 1; /* do restart aneg */
 203        }
 204
 205        /*
 206         * Only restart aneg if we are advertising something different
 207         * than we were before.
 208         */
 209        if (result > 0)
 210                result = genphy_restart_aneg(phydev);
 211
 212        return result;
 213}
 214
 215/**
 216 * genphy_update_link - update link status in @phydev
 217 * @phydev: target phy_device struct
 218 *
 219 * Description: Update the value in phydev->link to reflect the
 220 *   current link value.  In order to do this, we need to read
 221 *   the status register twice, keeping the second value.
 222 */
 223int genphy_update_link(struct phy_device *phydev)
 224{
 225        unsigned int mii_reg;
 226
 227        /*
 228         * Wait if the link is up, and autonegotiation is in progress
 229         * (ie - we're capable and it's not done)
 230         */
 231        mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 232
 233        /*
 234         * If we already saw the link up, and it hasn't gone down, then
 235         * we don't need to wait for autoneg again
 236         */
 237        if (phydev->link && mii_reg & BMSR_LSTATUS)
 238                return 0;
 239
 240        if ((phydev->autoneg == AUTONEG_ENABLE) &&
 241            !(mii_reg & BMSR_ANEGCOMPLETE)) {
 242                int i = 0;
 243
 244                printf("%s Waiting for PHY auto negotiation to complete",
 245                       phydev->dev->name);
 246                while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
 247                        /*
 248                         * Timeout reached ?
 249                         */
 250                        if (i > (PHY_ANEG_TIMEOUT / 50)) {
 251                                printf(" TIMEOUT !\n");
 252                                phydev->link = 0;
 253                                return -ETIMEDOUT;
 254                        }
 255
 256                        if (ctrlc()) {
 257                                puts("user interrupt!\n");
 258                                phydev->link = 0;
 259                                return -EINTR;
 260                        }
 261
 262                        if ((i++ % 10) == 0)
 263                                printf(".");
 264
 265                        mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 266                        mdelay(50);     /* 50 ms */
 267                }
 268                printf(" done\n");
 269                phydev->link = 1;
 270        } else {
 271                /* Read the link a second time to clear the latched state */
 272                mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 273
 274                if (mii_reg & BMSR_LSTATUS)
 275                        phydev->link = 1;
 276                else
 277                        phydev->link = 0;
 278        }
 279
 280        return 0;
 281}
 282
 283/*
 284 * Generic function which updates the speed and duplex.  If
 285 * autonegotiation is enabled, it uses the AND of the link
 286 * partner's advertised capabilities and our advertised
 287 * capabilities.  If autonegotiation is disabled, we use the
 288 * appropriate bits in the control register.
 289 *
 290 * Stolen from Linux's mii.c and phy_device.c
 291 */
 292int genphy_parse_link(struct phy_device *phydev)
 293{
 294        int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 295
 296        /* We're using autonegotiation */
 297        if (phydev->autoneg == AUTONEG_ENABLE) {
 298                u32 lpa = 0;
 299                int gblpa = 0;
 300                u32 estatus = 0;
 301
 302                /* Check for gigabit capability */
 303                if (phydev->supported & (SUPPORTED_1000baseT_Full |
 304                                        SUPPORTED_1000baseT_Half)) {
 305                        /* We want a list of states supported by
 306                         * both PHYs in the link
 307                         */
 308                        gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
 309                        if (gblpa < 0) {
 310                                debug("Could not read MII_STAT1000. ");
 311                                debug("Ignoring gigabit capability\n");
 312                                gblpa = 0;
 313                        }
 314                        gblpa &= phy_read(phydev,
 315                                        MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
 316                }
 317
 318                /* Set the baseline so we only have to set them
 319                 * if they're different
 320                 */
 321                phydev->speed = SPEED_10;
 322                phydev->duplex = DUPLEX_HALF;
 323
 324                /* Check the gigabit fields */
 325                if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
 326                        phydev->speed = SPEED_1000;
 327
 328                        if (gblpa & PHY_1000BTSR_1000FD)
 329                                phydev->duplex = DUPLEX_FULL;
 330
 331                        /* We're done! */
 332                        return 0;
 333                }
 334
 335                lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
 336                lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
 337
 338                if (lpa & (LPA_100FULL | LPA_100HALF)) {
 339                        phydev->speed = SPEED_100;
 340
 341                        if (lpa & LPA_100FULL)
 342                                phydev->duplex = DUPLEX_FULL;
 343
 344                } else if (lpa & LPA_10FULL) {
 345                        phydev->duplex = DUPLEX_FULL;
 346                }
 347
 348                /*
 349                 * Extended status may indicate that the PHY supports
 350                 * 1000BASE-T/X even though the 1000BASE-T registers
 351                 * are missing. In this case we can't tell whether the
 352                 * peer also supports it, so we only check extended
 353                 * status if the 1000BASE-T registers are actually
 354                 * missing.
 355                 */
 356                if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
 357                        estatus = phy_read(phydev, MDIO_DEVAD_NONE,
 358                                           MII_ESTATUS);
 359
 360                if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
 361                                ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
 362                        phydev->speed = SPEED_1000;
 363                        if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
 364                                phydev->duplex = DUPLEX_FULL;
 365                }
 366
 367        } else {
 368                u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
 369
 370                phydev->speed = SPEED_10;
 371                phydev->duplex = DUPLEX_HALF;
 372
 373                if (bmcr & BMCR_FULLDPLX)
 374                        phydev->duplex = DUPLEX_FULL;
 375
 376                if (bmcr & BMCR_SPEED1000)
 377                        phydev->speed = SPEED_1000;
 378                else if (bmcr & BMCR_SPEED100)
 379                        phydev->speed = SPEED_100;
 380        }
 381
 382        return 0;
 383}
 384
 385int genphy_config(struct phy_device *phydev)
 386{
 387        int val;
 388        u32 features;
 389
 390        features = (SUPPORTED_TP | SUPPORTED_MII
 391                        | SUPPORTED_AUI | SUPPORTED_FIBRE |
 392                        SUPPORTED_BNC);
 393
 394        /* Do we support autonegotiation? */
 395        val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
 396
 397        if (val < 0)
 398                return val;
 399
 400        if (val & BMSR_ANEGCAPABLE)
 401                features |= SUPPORTED_Autoneg;
 402
 403        if (val & BMSR_100FULL)
 404                features |= SUPPORTED_100baseT_Full;
 405        if (val & BMSR_100HALF)
 406                features |= SUPPORTED_100baseT_Half;
 407        if (val & BMSR_10FULL)
 408                features |= SUPPORTED_10baseT_Full;
 409        if (val & BMSR_10HALF)
 410                features |= SUPPORTED_10baseT_Half;
 411
 412        if (val & BMSR_ESTATEN) {
 413                val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
 414
 415                if (val < 0)
 416                        return val;
 417
 418                if (val & ESTATUS_1000_TFULL)
 419                        features |= SUPPORTED_1000baseT_Full;
 420                if (val & ESTATUS_1000_THALF)
 421                        features |= SUPPORTED_1000baseT_Half;
 422                if (val & ESTATUS_1000_XFULL)
 423                        features |= SUPPORTED_1000baseX_Full;
 424                if (val & ESTATUS_1000_XHALF)
 425                        features |= SUPPORTED_1000baseX_Half;
 426        }
 427
 428        phydev->supported &= features;
 429        phydev->advertising &= features;
 430
 431        genphy_config_aneg(phydev);
 432
 433        return 0;
 434}
 435
 436int genphy_startup(struct phy_device *phydev)
 437{
 438        int ret;
 439
 440        ret = genphy_update_link(phydev);
 441        if (ret)
 442                return ret;
 443
 444        return genphy_parse_link(phydev);
 445}
 446
 447int genphy_shutdown(struct phy_device *phydev)
 448{
 449        return 0;
 450}
 451
 452static struct phy_driver genphy_driver = {
 453        .uid            = 0xffffffff,
 454        .mask           = 0xffffffff,
 455        .name           = "Generic PHY",
 456        .features       = PHY_GBIT_FEATURES | SUPPORTED_MII |
 457                          SUPPORTED_AUI | SUPPORTED_FIBRE |
 458                          SUPPORTED_BNC,
 459        .config         = genphy_config,
 460        .startup        = genphy_startup,
 461        .shutdown       = genphy_shutdown,
 462};
 463
 464int genphy_init(void)
 465{
 466        return phy_register(&genphy_driver);
 467}
 468
 469static LIST_HEAD(phy_drivers);
 470
 471int phy_init(void)
 472{
 473#ifdef CONFIG_NEEDS_MANUAL_RELOC
 474        /*
 475         * The pointers inside phy_drivers also needs to be updated incase of
 476         * manual reloc, without which these points to some invalid
 477         * pre reloc address and leads to invalid accesses, hangs.
 478         */
 479        struct list_head *head = &phy_drivers;
 480
 481        head->next = (void *)head->next + gd->reloc_off;
 482        head->prev = (void *)head->prev + gd->reloc_off;
 483#endif
 484
 485#ifdef CONFIG_B53_SWITCH
 486        phy_b53_init();
 487#endif
 488#ifdef CONFIG_MV88E61XX_SWITCH
 489        phy_mv88e61xx_init();
 490#endif
 491#ifdef CONFIG_PHY_AQUANTIA
 492        phy_aquantia_init();
 493#endif
 494#ifdef CONFIG_PHY_ATHEROS
 495        phy_atheros_init();
 496#endif
 497#ifdef CONFIG_PHY_BROADCOM
 498        phy_broadcom_init();
 499#endif
 500#ifdef CONFIG_PHY_CORTINA
 501        phy_cortina_init();
 502#endif
 503#ifdef CONFIG_PHY_DAVICOM
 504        phy_davicom_init();
 505#endif
 506#ifdef CONFIG_PHY_ET1011C
 507        phy_et1011c_init();
 508#endif
 509#ifdef CONFIG_PHY_LXT
 510        phy_lxt_init();
 511#endif
 512#ifdef CONFIG_PHY_MARVELL
 513        phy_marvell_init();
 514#endif
 515#ifdef CONFIG_PHY_MICREL_KSZ8XXX
 516        phy_micrel_ksz8xxx_init();
 517#endif
 518#ifdef CONFIG_PHY_MICREL_KSZ90X1
 519        phy_micrel_ksz90x1_init();
 520#endif
 521#ifdef CONFIG_PHY_MESON_GXL
 522        phy_meson_gxl_init();
 523#endif
 524#ifdef CONFIG_PHY_NATSEMI
 525        phy_natsemi_init();
 526#endif
 527#ifdef CONFIG_PHY_REALTEK
 528        phy_realtek_init();
 529#endif
 530#ifdef CONFIG_PHY_SMSC
 531        phy_smsc_init();
 532#endif
 533#ifdef CONFIG_PHY_TERANETICS
 534        phy_teranetics_init();
 535#endif
 536#ifdef CONFIG_PHY_TI
 537        phy_ti_init();
 538#endif
 539#ifdef CONFIG_PHY_VITESSE
 540        phy_vitesse_init();
 541#endif
 542#ifdef CONFIG_PHY_XILINX
 543        phy_xilinx_init();
 544#endif
 545#ifdef CONFIG_PHY_MSCC
 546        phy_mscc_init();
 547#endif
 548#ifdef CONFIG_PHY_FIXED
 549        phy_fixed_init();
 550#endif
 551#ifdef CONFIG_PHY_NCSI
 552        phy_ncsi_init();
 553#endif
 554#ifdef CONFIG_PHY_XILINX_GMII2RGMII
 555        phy_xilinx_gmii2rgmii_init();
 556#endif
 557        genphy_init();
 558
 559        return 0;
 560}
 561
 562int phy_register(struct phy_driver *drv)
 563{
 564        INIT_LIST_HEAD(&drv->list);
 565        list_add_tail(&drv->list, &phy_drivers);
 566
 567#ifdef CONFIG_NEEDS_MANUAL_RELOC
 568        if (drv->probe)
 569                drv->probe += gd->reloc_off;
 570        if (drv->config)
 571                drv->config += gd->reloc_off;
 572        if (drv->startup)
 573                drv->startup += gd->reloc_off;
 574        if (drv->shutdown)
 575                drv->shutdown += gd->reloc_off;
 576        if (drv->readext)
 577                drv->readext += gd->reloc_off;
 578        if (drv->writeext)
 579                drv->writeext += gd->reloc_off;
 580        if (drv->read_mmd)
 581                drv->read_mmd += gd->reloc_off;
 582        if (drv->write_mmd)
 583                drv->write_mmd += gd->reloc_off;
 584#endif
 585        return 0;
 586}
 587
 588int phy_set_supported(struct phy_device *phydev, u32 max_speed)
 589{
 590        /* The default values for phydev->supported are provided by the PHY
 591         * driver "features" member, we want to reset to sane defaults first
 592         * before supporting higher speeds.
 593         */
 594        phydev->supported &= PHY_DEFAULT_FEATURES;
 595
 596        switch (max_speed) {
 597        default:
 598                return -ENOTSUPP;
 599        case SPEED_1000:
 600                phydev->supported |= PHY_1000BT_FEATURES;
 601                /* fall through */
 602        case SPEED_100:
 603                phydev->supported |= PHY_100BT_FEATURES;
 604                /* fall through */
 605        case SPEED_10:
 606                phydev->supported |= PHY_10BT_FEATURES;
 607        }
 608
 609        return 0;
 610}
 611
 612static int phy_probe(struct phy_device *phydev)
 613{
 614        int err = 0;
 615
 616        phydev->advertising = phydev->drv->features;
 617        phydev->supported = phydev->drv->features;
 618
 619        phydev->mmds = phydev->drv->mmds;
 620
 621        if (phydev->drv->probe)
 622                err = phydev->drv->probe(phydev);
 623
 624        return err;
 625}
 626
 627static struct phy_driver *generic_for_interface(phy_interface_t interface)
 628{
 629#ifdef CONFIG_PHYLIB_10G
 630        if (is_10g_interface(interface))
 631                return &gen10g_driver;
 632#endif
 633
 634        return &genphy_driver;
 635}
 636
 637static struct phy_driver *get_phy_driver(struct phy_device *phydev,
 638                                         phy_interface_t interface)
 639{
 640        struct list_head *entry;
 641        int phy_id = phydev->phy_id;
 642        struct phy_driver *drv = NULL;
 643
 644        list_for_each(entry, &phy_drivers) {
 645                drv = list_entry(entry, struct phy_driver, list);
 646                if ((drv->uid & drv->mask) == (phy_id & drv->mask))
 647                        return drv;
 648        }
 649
 650        /* If we made it here, there's no driver for this PHY */
 651        return generic_for_interface(interface);
 652}
 653
 654static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
 655                                            u32 phy_id, bool is_c45,
 656                                            phy_interface_t interface)
 657{
 658        struct phy_device *dev;
 659
 660        /*
 661         * We allocate the device, and initialize the
 662         * default values
 663         */
 664        dev = malloc(sizeof(*dev));
 665        if (!dev) {
 666                printf("Failed to allocate PHY device for %s:%d\n",
 667                       bus->name, addr);
 668                return NULL;
 669        }
 670
 671        memset(dev, 0, sizeof(*dev));
 672
 673        dev->duplex = -1;
 674        dev->link = 0;
 675        dev->interface = interface;
 676
 677#ifdef CONFIG_DM_ETH
 678        dev->node = ofnode_null();
 679#endif
 680
 681        dev->autoneg = AUTONEG_ENABLE;
 682
 683        dev->addr = addr;
 684        dev->phy_id = phy_id;
 685        dev->is_c45 = is_c45;
 686        dev->bus = bus;
 687
 688        dev->drv = get_phy_driver(dev, interface);
 689
 690        if (phy_probe(dev)) {
 691                printf("%s, PHY probe failed\n", __func__);
 692                return NULL;
 693        }
 694
 695        if (addr >= 0 && addr < PHY_MAX_ADDR)
 696                bus->phymap[addr] = dev;
 697
 698        return dev;
 699}
 700
 701/**
 702 * get_phy_id - reads the specified addr for its ID.
 703 * @bus: the target MII bus
 704 * @addr: PHY address on the MII bus
 705 * @phy_id: where to store the ID retrieved.
 706 *
 707 * Description: Reads the ID registers of the PHY at @addr on the
 708 *   @bus, stores it in @phy_id and returns zero on success.
 709 */
 710int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 711{
 712        int phy_reg;
 713
 714        /*
 715         * Grab the bits from PHYIR1, and put them
 716         * in the upper half
 717         */
 718        phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 719
 720        if (phy_reg < 0)
 721                return -EIO;
 722
 723        *phy_id = (phy_reg & 0xffff) << 16;
 724
 725        /* Grab the bits from PHYIR2, and put them in the lower half */
 726        phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 727
 728        if (phy_reg < 0)
 729                return -EIO;
 730
 731        *phy_id |= (phy_reg & 0xffff);
 732
 733        return 0;
 734}
 735
 736static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
 737                                             uint phy_mask, int devad,
 738                                             phy_interface_t interface)
 739{
 740        u32 phy_id = 0xffffffff;
 741        bool is_c45;
 742
 743        while (phy_mask) {
 744                int addr = ffs(phy_mask) - 1;
 745                int r = get_phy_id(bus, addr, devad, &phy_id);
 746
 747                /*
 748                 * If the PHY ID is flat 0 we ignore it.  There are C45 PHYs
 749                 * that return all 0s for C22 reads (like Aquantia AQR112) and
 750                 * there are C22 PHYs that return all 0s for C45 reads (like
 751                 * Atheros AR8035).
 752                 */
 753                if (r == 0 && phy_id == 0)
 754                        goto next;
 755
 756                /* If the PHY ID is mostly f's, we didn't find anything */
 757                if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
 758                        is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
 759                        return phy_device_create(bus, addr, phy_id, is_c45,
 760                                                 interface);
 761                }
 762next:
 763                phy_mask &= ~(1 << addr);
 764        }
 765        return NULL;
 766}
 767
 768static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
 769                                                  uint phy_mask,
 770                                                  phy_interface_t interface)
 771{
 772        /* If we have one, return the existing device, with new interface */
 773        while (phy_mask) {
 774                int addr = ffs(phy_mask) - 1;
 775
 776                if (bus->phymap[addr]) {
 777                        bus->phymap[addr]->interface = interface;
 778                        return bus->phymap[addr];
 779                }
 780                phy_mask &= ~(1 << addr);
 781        }
 782        return NULL;
 783}
 784
 785static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
 786                                                 uint phy_mask,
 787                                                 phy_interface_t interface)
 788{
 789        int i;
 790        struct phy_device *phydev;
 791
 792        phydev = search_for_existing_phy(bus, phy_mask, interface);
 793        if (phydev)
 794                return phydev;
 795        /* Try Standard (ie Clause 22) access */
 796        /* Otherwise we have to try Clause 45 */
 797        for (i = 0; i < 5; i++) {
 798                phydev = create_phy_by_mask(bus, phy_mask,
 799                                            i ? i : MDIO_DEVAD_NONE, interface);
 800                if (IS_ERR(phydev))
 801                        return NULL;
 802                if (phydev)
 803                        return phydev;
 804        }
 805
 806        debug("\n%s PHY: ", bus->name);
 807        while (phy_mask) {
 808                int addr = ffs(phy_mask) - 1;
 809
 810                debug("%d ", addr);
 811                phy_mask &= ~(1 << addr);
 812        }
 813        debug("not found\n");
 814
 815        return NULL;
 816}
 817
 818/**
 819 * get_phy_device - reads the specified PHY device and returns its
 820 *                  @phy_device struct
 821 * @bus: the target MII bus
 822 * @addr: PHY address on the MII bus
 823 *
 824 * Description: Reads the ID registers of the PHY at @addr on the
 825 *   @bus, then allocates and returns the phy_device to represent it.
 826 */
 827static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
 828                                         phy_interface_t interface)
 829{
 830        return get_phy_device_by_mask(bus, 1 << addr, interface);
 831}
 832
 833int phy_reset(struct phy_device *phydev)
 834{
 835        int reg;
 836        int timeout = 500;
 837        int devad = MDIO_DEVAD_NONE;
 838
 839        if (phydev->flags & PHY_FLAG_BROKEN_RESET)
 840                return 0;
 841
 842#ifdef CONFIG_PHYLIB_10G
 843        /* If it's 10G, we need to issue reset through one of the MMDs */
 844        if (is_10g_interface(phydev->interface)) {
 845                if (!phydev->mmds)
 846                        gen10g_discover_mmds(phydev);
 847
 848                devad = ffs(phydev->mmds) - 1;
 849        }
 850#endif
 851
 852        if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
 853                debug("PHY reset failed\n");
 854                return -1;
 855        }
 856
 857#ifdef CONFIG_PHY_RESET_DELAY
 858        udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
 859#endif
 860        /*
 861         * Poll the control register for the reset bit to go to 0 (it is
 862         * auto-clearing).  This should happen within 0.5 seconds per the
 863         * IEEE spec.
 864         */
 865        reg = phy_read(phydev, devad, MII_BMCR);
 866        while ((reg & BMCR_RESET) && timeout--) {
 867                reg = phy_read(phydev, devad, MII_BMCR);
 868
 869                if (reg < 0) {
 870                        debug("PHY status read failed\n");
 871                        return -1;
 872                }
 873                udelay(1000);
 874        }
 875
 876        if (reg & BMCR_RESET) {
 877                puts("PHY reset timed out\n");
 878                return -1;
 879        }
 880
 881        return 0;
 882}
 883
 884int miiphy_reset(const char *devname, unsigned char addr)
 885{
 886        struct mii_dev *bus = miiphy_get_dev_by_name(devname);
 887        struct phy_device *phydev;
 888
 889        /*
 890         * miiphy_reset was only used on standard PHYs, so we'll fake it here.
 891         * If later code tries to connect with the right interface, this will
 892         * be corrected by get_phy_device in phy_connect()
 893         */
 894        phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
 895
 896        return phy_reset(phydev);
 897}
 898
 899struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
 900                                    phy_interface_t interface)
 901{
 902        /* Reset the bus */
 903        if (bus->reset) {
 904                bus->reset(bus);
 905
 906                /* Wait 15ms to make sure the PHY has come out of hard reset */
 907                mdelay(15);
 908        }
 909
 910        return get_phy_device_by_mask(bus, phy_mask, interface);
 911}
 912
 913#ifdef CONFIG_DM_ETH
 914void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
 915#else
 916void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
 917#endif
 918{
 919        /* Soft Reset the PHY */
 920        phy_reset(phydev);
 921        if (phydev->dev && phydev->dev != dev) {
 922                printf("%s:%d is connected to %s.  Reconnecting to %s\n",
 923                       phydev->bus->name, phydev->addr,
 924                       phydev->dev->name, dev->name);
 925        }
 926        phydev->dev = dev;
 927        debug("%s connected to %s\n", dev->name, phydev->drv->name);
 928}
 929
 930#ifdef CONFIG_PHY_XILINX_GMII2RGMII
 931#ifdef CONFIG_DM_ETH
 932static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 933                                                 struct udevice *dev,
 934                                                 phy_interface_t interface)
 935#else
 936static struct phy_device *phy_connect_gmii2rgmii(struct mii_dev *bus,
 937                                                 struct eth_device *dev,
 938                                                 phy_interface_t interface)
 939#endif
 940{
 941        struct phy_device *phydev = NULL;
 942        int sn = dev_of_offset(dev);
 943        int off;
 944
 945        while (sn > 0) {
 946                off = fdt_node_offset_by_compatible(gd->fdt_blob, sn,
 947                                                    "xlnx,gmii-to-rgmii-1.0");
 948                if (off > 0) {
 949                        phydev = phy_device_create(bus, off,
 950                                                   PHY_GMII2RGMII_ID, false,
 951                                                   interface);
 952                        break;
 953                }
 954                if (off == -FDT_ERR_NOTFOUND)
 955                        sn = fdt_first_subnode(gd->fdt_blob, sn);
 956                else
 957                        printf("%s: Error finding compat string:%d\n",
 958                               __func__, off);
 959        }
 960
 961        return phydev;
 962}
 963#endif
 964
 965#ifdef CONFIG_PHY_FIXED
 966#ifdef CONFIG_DM_ETH
 967static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 968                                            struct udevice *dev,
 969                                            phy_interface_t interface)
 970#else
 971static struct phy_device *phy_connect_fixed(struct mii_dev *bus,
 972                                            struct eth_device *dev,
 973                                            phy_interface_t interface)
 974#endif
 975{
 976        struct phy_device *phydev = NULL;
 977        int sn;
 978        const char *name;
 979
 980        sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 981        while (sn > 0) {
 982                name = fdt_get_name(gd->fdt_blob, sn, NULL);
 983                if (name && strcmp(name, "fixed-link") == 0) {
 984                        phydev = phy_device_create(bus, sn, PHY_FIXED_ID, false,
 985                                                   interface);
 986                        break;
 987                }
 988                sn = fdt_next_subnode(gd->fdt_blob, sn);
 989        }
 990
 991        return phydev;
 992}
 993#endif
 994
 995#ifdef CONFIG_DM_ETH
 996struct phy_device *phy_connect(struct mii_dev *bus, int addr,
 997                               struct udevice *dev,
 998                               phy_interface_t interface)
 999#else
1000struct phy_device *phy_connect(struct mii_dev *bus, int addr,
1001                               struct eth_device *dev,
1002                               phy_interface_t interface)
1003#endif
1004{
1005        struct phy_device *phydev = NULL;
1006        uint mask = (addr >= 0) ? (1 << addr) : 0xffffffff;
1007
1008#ifdef CONFIG_PHY_FIXED
1009        phydev = phy_connect_fixed(bus, dev, interface);
1010#endif
1011
1012#ifdef CONFIG_PHY_NCSI
1013        if (!phydev)
1014                phydev = phy_device_create(bus, 0, PHY_NCSI_ID, false, interface);
1015#endif
1016
1017#ifdef CONFIG_PHY_XILINX_GMII2RGMII
1018        if (!phydev)
1019                phydev = phy_connect_gmii2rgmii(bus, dev, interface);
1020#endif
1021
1022        if (!phydev)
1023                phydev = phy_find_by_mask(bus, mask, interface);
1024
1025        if (phydev)
1026                phy_connect_dev(phydev, dev);
1027        else
1028                printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
1029        return phydev;
1030}
1031
1032/*
1033 * Start the PHY.  Returns 0 on success, or a negative error code.
1034 */
1035int phy_startup(struct phy_device *phydev)
1036{
1037        if (phydev->drv->startup)
1038                return phydev->drv->startup(phydev);
1039
1040        return 0;
1041}
1042
1043__weak int board_phy_config(struct phy_device *phydev)
1044{
1045        if (phydev->drv->config)
1046                return phydev->drv->config(phydev);
1047        return 0;
1048}
1049
1050int phy_config(struct phy_device *phydev)
1051{
1052        /* Invoke an optional board-specific helper */
1053        return board_phy_config(phydev);
1054}
1055
1056int phy_shutdown(struct phy_device *phydev)
1057{
1058        if (phydev->drv->shutdown)
1059                phydev->drv->shutdown(phydev);
1060
1061        return 0;
1062}
1063
1064int phy_get_interface_by_name(const char *str)
1065{
1066        int i;
1067
1068        for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
1069                if (!strcmp(str, phy_interface_strings[i]))
1070                        return i;
1071        }
1072
1073        return -1;
1074}
1075