drivers/net/sh_eth.c

   1 /*
   2  * sh_eth.c - Driver for Renesas ethernet controler.
   3  *
   4  * Copyright (C) 2008, 2011 Renesas Solutions Corp.
   5  * Copyright (c) 2008, 2011 Nobuhiro Iwamatsu
   6  * Copyright (c) 2007 Carlos Munoz <carlos@kenati.com>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <config.h>
  12 #include <common.h>
  13 #include <malloc.h>
  14 #include <net.h>
  15 #include <netdev.h>
  16 #include <miiphy.h>
  17 #include <asm/errno.h>
  18 #include <asm/io.h>
  19
  20 #include "sh_eth.h"
  21
  22 #ifndef CONFIG_SH_ETHER_USE_PORT
  23 # error "Please define CONFIG_SH_ETHER_USE_PORT"
  24 #endif
  25 #ifndef CONFIG_SH_ETHER_PHY_ADDR
  26 # error "Please define CONFIG_SH_ETHER_PHY_ADDR"
  27 #endif
  28
  29 #if defined(CONFIG_SH_ETHER_CACHE_WRITEBACK) && !defined(CONFIG_SYS_DCACHE_OFF)
  30 #define flush_cache_wback(addr, len)    \
  31                 flush_dcache_range((u32)addr, (u32)(addr + len - 1))
  32 #else
  33 #define flush_cache_wback(...)
  34 #endif
  35
  36 #if defined(CONFIG_SH_ETHER_CACHE_INVALIDATE) && defined(CONFIG_ARM)
  37 #define invalidate_cache(addr, len)             \
  38         {       \
  39                 u32 line_size = CONFIG_SH_ETHER_ALIGNE_SIZE;    \
  40                 u32 start, end; \
  41                 \
  42                 start = (u32)addr;      \
  43                 end = start + len;      \
  44                 start &= ~(line_size - 1);      \
  45                 end = ((end + line_size - 1) & ~(line_size - 1));       \
  46                 \
  47                 invalidate_dcache_range(start, end);    \
  48         }
  49 #else
  50 #define invalidate_cache(...)
  51 #endif
  52
  53 #define TIMEOUT_CNT 1000
  54
  55 int sh_eth_send(struct eth_device *dev, void *packet, int len)
  56 {
  57         struct sh_eth_dev *eth = dev->priv;
  58         int port = eth->port, ret = 0, timeout;
  59         struct sh_eth_info *port_info = &eth->port_info[port];
  60
  61         if (!packet || len > 0xffff) {
  62                 printf(SHETHER_NAME ": %s: Invalid argument\n", __func__);
  63                 ret = -EINVAL;
  64                 goto err;
  65         }
  66
  67         /* packet must be a 4 byte boundary */
  68         if ((int)packet & 3) {
  69                 printf(SHETHER_NAME ": %s: packet not 4 byte alligned\n", __func__);
  70                 ret = -EFAULT;
  71                 goto err;
  72         }
  73
  74         /* Update tx descriptor */
  75         flush_cache_wback(packet, len);
  76         port_info->tx_desc_cur->td2 = ADDR_TO_PHY(packet);
  77         port_info->tx_desc_cur->td1 = len << 16;
  78         /* Must preserve the end of descriptor list indication */
  79         if (port_info->tx_desc_cur->td0 & TD_TDLE)
  80                 port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP | TD_TDLE;
  81         else
  82                 port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP;
  83
  84         /* Restart the transmitter if disabled */
  85         if (!(sh_eth_read(eth, EDTRR) & EDTRR_TRNS))
  86                 sh_eth_write(eth, EDTRR_TRNS, EDTRR);
  87
  88         /* Wait until packet is transmitted */
  89         timeout = TIMEOUT_CNT;
  90         do {
  91                 invalidate_cache(port_info->tx_desc_cur,
  92                                  sizeof(struct tx_desc_s));
  93                 udelay(100);
  94         } while (port_info->tx_desc_cur->td0 & TD_TACT && timeout--);
  95
  96         if (timeout < 0) {
  97                 printf(SHETHER_NAME ": transmit timeout\n");
  98                 ret = -ETIMEDOUT;
  99                 goto err;
 100         }
 101
 102         port_info->tx_desc_cur++;
 103         if (port_info->tx_desc_cur >= port_info->tx_desc_base + NUM_TX_DESC)
 104                 port_info->tx_desc_cur = port_info->tx_desc_base;
 105
 106 err:
 107         return ret;
 108 }
 109
 110 int sh_eth_recv(struct eth_device *dev)
 111 {
 112         struct sh_eth_dev *eth = dev->priv;
 113         int port = eth->port, len = 0;
 114         struct sh_eth_info *port_info = &eth->port_info[port];
 115         uchar *packet;
 116
 117         /* Check if the rx descriptor is ready */
 118         invalidate_cache(port_info->rx_desc_cur, sizeof(struct rx_desc_s));
 119         if (!(port_info->rx_desc_cur->rd0 & RD_RACT)) {
 120                 /* Check for errors */
 121                 if (!(port_info->rx_desc_cur->rd0 & RD_RFE)) {
 122                         len = port_info->rx_desc_cur->rd1 & 0xffff;
 123                         packet = (uchar *)
 124                                 ADDR_TO_P2(port_info->rx_desc_cur->rd2);
 125                         invalidate_cache(packet, len);
 126                         NetReceive(packet, len);
 127                 }
 128
 129                 /* Make current descriptor available again */
 130                 if (port_info->rx_desc_cur->rd0 & RD_RDLE)
 131                         port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE;
 132                 else
 133                         port_info->rx_desc_cur->rd0 = RD_RACT;
 134                 /* Point to the next descriptor */
 135                 port_info->rx_desc_cur++;
 136                 if (port_info->rx_desc_cur >=
 137                     port_info->rx_desc_base + NUM_RX_DESC)
 138                         port_info->rx_desc_cur = port_info->rx_desc_base;
 139         }
 140
 141         /* Restart the receiver if disabled */
 142         if (!(sh_eth_read(eth, EDRRR) & EDRRR_R))
 143                 sh_eth_write(eth, EDRRR_R, EDRRR);
 144
 145         return len;
 146 }
 147
 148 static int sh_eth_reset(struct sh_eth_dev *eth)
 149 {
 150 #if defined(SH_ETH_TYPE_GETHER)
 151         int ret = 0, i;
 152
 153         /* Start e-dmac transmitter and receiver */
 154         sh_eth_write(eth, EDSR_ENALL, EDSR);
 155
 156         /* Perform a software reset and wait for it to complete */
 157         sh_eth_write(eth, EDMR_SRST, EDMR);
 158         for (i = 0; i < TIMEOUT_CNT ; i++) {
 159                 if (!(sh_eth_read(eth, EDMR) & EDMR_SRST))
 160                         break;
 161                 udelay(1000);
 162         }
 163
 164         if (i == TIMEOUT_CNT) {
 165                 printf(SHETHER_NAME  ": Software reset timeout\n");
 166                 ret = -EIO;
 167         }
 168
 169         return ret;
 170 #else
 171         sh_eth_write(eth, sh_eth_read(eth, EDMR) | EDMR_SRST, EDMR);
 172         udelay(3000);
 173         sh_eth_write(eth, sh_eth_read(eth, EDMR) & ~EDMR_SRST, EDMR);
 174
 175         return 0;
 176 #endif
 177 }
 178
 179 static int sh_eth_tx_desc_init(struct sh_eth_dev *eth)
 180 {
 181         int port = eth->port, i, ret = 0;
 182         u32 tmp_addr;
 183         struct sh_eth_info *port_info = &eth->port_info[port];
 184         struct tx_desc_s *cur_tx_desc;
 185
 186         /*
 187          * Allocate tx descriptors. They must be TX_DESC_SIZE bytes aligned
 188          */
 189         port_info->tx_desc_malloc = malloc(NUM_TX_DESC *
 190                                                  sizeof(struct tx_desc_s) +
 191                                                  TX_DESC_SIZE - 1);
 192         if (!port_info->tx_desc_malloc) {
 193                 printf(SHETHER_NAME ": malloc failed\n");
 194                 ret = -ENOMEM;
 195                 goto err;
 196         }
 197
 198         tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) &
 199                           ~(TX_DESC_SIZE - 1));
 200         flush_cache_wback(tmp_addr, NUM_TX_DESC * sizeof(struct tx_desc_s));
 201         /* Make sure we use a P2 address (non-cacheable) */
 202         port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr);
 203         port_info->tx_desc_cur = port_info->tx_desc_base;
 204
 205         /* Initialize all descriptors */
 206         for (cur_tx_desc = port_info->tx_desc_base, i = 0; i < NUM_TX_DESC;
 207              cur_tx_desc++, i++) {
 208                 cur_tx_desc->td0 = 0x00;
 209                 cur_tx_desc->td1 = 0x00;
 210                 cur_tx_desc->td2 = 0x00;
 211         }
 212
 213         /* Mark the end of the descriptors */
 214         cur_tx_desc--;
 215         cur_tx_desc->td0 |= TD_TDLE;
 216
 217         /* Point the controller to the tx descriptor list. Must use physical
 218            addresses */
 219         sh_eth_write(eth, ADDR_TO_PHY(port_info->tx_desc_base), TDLAR);
 220 #if defined(SH_ETH_TYPE_GETHER)
 221         sh_eth_write(eth, ADDR_TO_PHY(port_info->tx_desc_base), TDFAR);
 222         sh_eth_write(eth, ADDR_TO_PHY(cur_tx_desc), TDFXR);
 223         sh_eth_write(eth, 0x01, TDFFR);/* Last discriptor bit */
 224 #endif
 225
 226 err:
 227         return ret;
 228 }
 229
 230 static int sh_eth_rx_desc_init(struct sh_eth_dev *eth)
 231 {
 232         int port = eth->port, i , ret = 0;
 233         struct sh_eth_info *port_info = &eth->port_info[port];
 234         struct rx_desc_s *cur_rx_desc;
 235         u32 tmp_addr;
 236         u8 *rx_buf;
 237
 238         /*
 239          * Allocate rx descriptors. They must be RX_DESC_SIZE bytes aligned
 240          */
 241         port_info->rx_desc_malloc = malloc(NUM_RX_DESC *
 242                                                  sizeof(struct rx_desc_s) +
 243                                                  RX_DESC_SIZE - 1);
 244         if (!port_info->rx_desc_malloc) {
 245                 printf(SHETHER_NAME ": malloc failed\n");
 246                 ret = -ENOMEM;
 247                 goto err;
 248         }
 249
 250         tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) &
 251                           ~(RX_DESC_SIZE - 1));
 252         flush_cache_wback(tmp_addr, NUM_RX_DESC * sizeof(struct rx_desc_s));
 253         /* Make sure we use a P2 address (non-cacheable) */
 254         port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr);
 255
 256         port_info->rx_desc_cur = port_info->rx_desc_base;
 257
 258         /*
 259          * Allocate rx data buffers. They must be 32 bytes aligned  and in
 260          * P2 area
 261          */
 262         port_info->rx_buf_malloc = malloc(
 263                 NUM_RX_DESC * MAX_BUF_SIZE + RX_BUF_ALIGNE_SIZE - 1);
 264         if (!port_info->rx_buf_malloc) {
 265                 printf(SHETHER_NAME ": malloc failed\n");
 266                 ret = -ENOMEM;
 267                 goto err_buf_malloc;
 268         }
 269
 270         tmp_addr = (u32)(((int)port_info->rx_buf_malloc
 271                           + (RX_BUF_ALIGNE_SIZE - 1)) &
 272                           ~(RX_BUF_ALIGNE_SIZE - 1));
 273         port_info->rx_buf_base = (u8 *)ADDR_TO_P2(tmp_addr);
 274
 275         /* Initialize all descriptors */
 276         for (cur_rx_desc = port_info->rx_desc_base,
 277              rx_buf = port_info->rx_buf_base, i = 0;
 278              i < NUM_RX_DESC; cur_rx_desc++, rx_buf += MAX_BUF_SIZE, i++) {
 279                 cur_rx_desc->rd0 = RD_RACT;
 280                 cur_rx_desc->rd1 = MAX_BUF_SIZE << 16;
 281                 cur_rx_desc->rd2 = (u32) ADDR_TO_PHY(rx_buf);
 282         }
 283
 284         /* Mark the end of the descriptors */
 285         cur_rx_desc--;
 286         cur_rx_desc->rd0 |= RD_RDLE;
 287
 288         /* Point the controller to the rx descriptor list */
 289         sh_eth_write(eth, ADDR_TO_PHY(port_info->rx_desc_base), RDLAR);
 290 #if defined(SH_ETH_TYPE_GETHER)
 291         sh_eth_write(eth, ADDR_TO_PHY(port_info->rx_desc_base), RDFAR);
 292         sh_eth_write(eth, ADDR_TO_PHY(cur_rx_desc), RDFXR);
 293         sh_eth_write(eth, RDFFR_RDLF, RDFFR);
 294 #endif
 295
 296         return ret;
 297
 298 err_buf_malloc:
 299         free(port_info->rx_desc_malloc);
 300         port_info->rx_desc_malloc = NULL;
 301
 302 err:
 303         return ret;
 304 }
 305
 306 static void sh_eth_tx_desc_free(struct sh_eth_dev *eth)
 307 {
 308         int port = eth->port;
 309         struct sh_eth_info *port_info = &eth->port_info[port];
 310
 311         if (port_info->tx_desc_malloc) {
 312                 free(port_info->tx_desc_malloc);
 313                 port_info->tx_desc_malloc = NULL;
 314         }
 315 }
 316
 317 static void sh_eth_rx_desc_free(struct sh_eth_dev *eth)
 318 {
 319         int port = eth->port;
 320         struct sh_eth_info *port_info = &eth->port_info[port];
 321
 322         if (port_info->rx_desc_malloc) {
 323                 free(port_info->rx_desc_malloc);
 324                 port_info->rx_desc_malloc = NULL;
 325         }
 326
 327         if (port_info->rx_buf_malloc) {
 328                 free(port_info->rx_buf_malloc);
 329                 port_info->rx_buf_malloc = NULL;
 330         }
 331 }
 332
 333 static int sh_eth_desc_init(struct sh_eth_dev *eth)
 334 {
 335         int ret = 0;
 336
 337         ret = sh_eth_tx_desc_init(eth);
 338         if (ret)
 339                 goto err_tx_init;
 340
 341         ret = sh_eth_rx_desc_init(eth);
 342         if (ret)
 343                 goto err_rx_init;
 344
 345         return ret;
 346 err_rx_init:
 347         sh_eth_tx_desc_free(eth);
 348
 349 err_tx_init:
 350         return ret;
 351 }
 352
 353 static int sh_eth_phy_config(struct sh_eth_dev *eth)
 354 {
 355         int port = eth->port, ret = 0;
 356         struct sh_eth_info *port_info = &eth->port_info[port];
 357         struct eth_device *dev = port_info->dev;
 358         struct phy_device *phydev;
 359
 360         phydev = phy_connect(
 361                         miiphy_get_dev_by_name(dev->name),
 362                         port_info->phy_addr, dev, CONFIG_SH_ETHER_PHY_MODE);
 363         port_info->phydev = phydev;
 364         phy_config(phydev);
 365
 366         return ret;
 367 }
 368
 369 static int sh_eth_config(struct sh_eth_dev *eth, bd_t *bd)
 370 {
 371         int port = eth->port, ret = 0;
 372         u32 val;
 373         struct sh_eth_info *port_info = &eth->port_info[port];
 374         struct eth_device *dev = port_info->dev;
 375         struct phy_device *phy;
 376
 377         /* Configure e-dmac registers */
 378         sh_eth_write(eth, (sh_eth_read(eth, EDMR) & ~EMDR_DESC_R) |
 379                         (EMDR_DESC | EDMR_EL), EDMR);
 380
 381         sh_eth_write(eth, 0, EESIPR);
 382         sh_eth_write(eth, 0, TRSCER);
 383         sh_eth_write(eth, 0, TFTR);
 384         sh_eth_write(eth, (FIFO_SIZE_T | FIFO_SIZE_R), FDR);
 385         sh_eth_write(eth, RMCR_RST, RMCR);
 386 #if defined(SH_ETH_TYPE_GETHER)
 387         sh_eth_write(eth, 0, RPADIR);
 388 #endif
 389         sh_eth_write(eth, (FIFO_F_D_RFF | FIFO_F_D_RFD), FCFTR);
 390
 391         /* Configure e-mac registers */
 392         sh_eth_write(eth, 0, ECSIPR);
 393
 394         /* Set Mac address */
 395         val = dev->enetaddr[0] << 24 | dev->enetaddr[1] << 16 |
 396             dev->enetaddr[2] << 8 | dev->enetaddr[3];
 397         sh_eth_write(eth, val, MAHR);
 398
 399         val = dev->enetaddr[4] << 8 | dev->enetaddr[5];
 400         sh_eth_write(eth, val, MALR);
 401
 402         sh_eth_write(eth, RFLR_RFL_MIN, RFLR);
 403 #if defined(SH_ETH_TYPE_GETHER)
 404         sh_eth_write(eth, 0, PIPR);
 405         sh_eth_write(eth, APR_AP, APR);
 406         sh_eth_write(eth, MPR_MP, MPR);
 407         sh_eth_write(eth, TPAUSER_TPAUSE, TPAUSER);
 408 #endif
 409
 410 #if defined(CONFIG_CPU_SH7734) || defined(CONFIG_R8A7740)
 411         sh_eth_write(eth, CONFIG_SH_ETHER_SH7734_MII, RMII_MII);
 412 #endif
 413         /* Configure phy */
 414         ret = sh_eth_phy_config(eth);
 415         if (ret) {
 416                 printf(SHETHER_NAME ": phy config timeout\n");
 417                 goto err_phy_cfg;
 418         }
 419         phy = port_info->phydev;
 420         ret = phy_startup(phy);
 421         if (ret) {
 422                 printf(SHETHER_NAME ": phy startup failure\n");
 423                 return ret;
 424         }
 425
 426         val = 0;
 427
 428         /* Set the transfer speed */
 429         if (phy->speed == 100) {
 430                 printf(SHETHER_NAME ": 100Base/");
 431 #if defined(SH_ETH_TYPE_GETHER)
 432                 sh_eth_write(eth, GECMR_100B, GECMR);
 433 #elif defined(CONFIG_CPU_SH7757) || defined(CONFIG_CPU_SH7752)
 434                 sh_eth_write(eth, 1, RTRATE);
 435 #elif defined(CONFIG_CPU_SH7724)
 436                 val = ECMR_RTM;
 437 #endif
 438         } else if (phy->speed == 10) {
 439                 printf(SHETHER_NAME ": 10Base/");
 440 #if defined(SH_ETH_TYPE_GETHER)
 441                 sh_eth_write(eth, GECMR_10B, GECMR);
 442 #elif defined(CONFIG_CPU_SH7757) || defined(CONFIG_CPU_SH7752)
 443                 sh_eth_write(eth, 0, RTRATE);
 444 #endif
 445         }
 446 #if defined(SH_ETH_TYPE_GETHER)
 447         else if (phy->speed == 1000) {
 448                 printf(SHETHER_NAME ": 1000Base/");
 449                 sh_eth_write(eth, GECMR_1000B, GECMR);
 450         }
 451 #endif
 452
 453         /* Check if full duplex mode is supported by the phy */
 454         if (phy->duplex) {
 455                 printf("Full\n");
 456                 sh_eth_write(eth, val | (ECMR_CHG_DM|ECMR_RE|ECMR_TE|ECMR_DM),
 457                              ECMR);
 458         } else {
 459                 printf("Half\n");
 460                 sh_eth_write(eth, val | (ECMR_CHG_DM|ECMR_RE|ECMR_TE), ECMR);
 461         }
 462
 463         return ret;
 464
 465 err_phy_cfg:
 466         return ret;
 467 }
 468
 469 static void sh_eth_start(struct sh_eth_dev *eth)
 470 {
 471         /*
 472          * Enable the e-dmac receiver only. The transmitter will be enabled when
 473          * we have something to transmit
 474          */
 475         sh_eth_write(eth, EDRRR_R, EDRRR);
 476 }
 477
 478 static void sh_eth_stop(struct sh_eth_dev *eth)
 479 {
 480         sh_eth_write(eth, ~EDRRR_R, EDRRR);
 481 }
 482
 483 int sh_eth_init(struct eth_device *dev, bd_t *bd)
 484 {
 485         int ret = 0;
 486         struct sh_eth_dev *eth = dev->priv;
 487
 488         ret = sh_eth_reset(eth);
 489         if (ret)
 490                 goto err;
 491
 492         ret = sh_eth_desc_init(eth);
 493         if (ret)
 494                 goto err;
 495
 496         ret = sh_eth_config(eth, bd);
 497         if (ret)
 498                 goto err_config;
 499
 500         sh_eth_start(eth);
 501
 502         return ret;
 503
 504 err_config:
 505         sh_eth_tx_desc_free(eth);
 506         sh_eth_rx_desc_free(eth);
 507
 508 err:
 509         return ret;
 510 }
 511
 512 void sh_eth_halt(struct eth_device *dev)
 513 {
 514         struct sh_eth_dev *eth = dev->priv;
 515         sh_eth_stop(eth);
 516 }
 517
 518 int sh_eth_initialize(bd_t *bd)
 519 {
 520     int ret = 0;
 521         struct sh_eth_dev *eth = NULL;
 522     struct eth_device *dev = NULL;
 523
 524     eth = (struct sh_eth_dev *)malloc(sizeof(struct sh_eth_dev));
 525         if (!eth) {
 526                 printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
 527                 ret = -ENOMEM;
 528                 goto err;
 529         }
 530
 531     dev = (struct eth_device *)malloc(sizeof(struct eth_device));
 532         if (!dev) {
 533                 printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
 534                 ret = -ENOMEM;
 535                 goto err;
 536         }
 537     memset(dev, 0, sizeof(struct eth_device));
 538     memset(eth, 0, sizeof(struct sh_eth_dev));
 539
 540         eth->port = CONFIG_SH_ETHER_USE_PORT;
 541         eth->port_info[eth->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR;
 542
 543     dev->priv = (void *)eth;
 544     dev->iobase = 0;
 545     dev->init = sh_eth_init;
 546     dev->halt = sh_eth_halt;
 547     dev->send = sh_eth_send;
 548     dev->recv = sh_eth_recv;
 549     eth->port_info[eth->port].dev = dev;
 550
 551         sprintf(dev->name, SHETHER_NAME);
 552
 553     /* Register Device to EtherNet subsystem  */
 554     eth_register(dev);
 555
 556         bb_miiphy_buses[0].priv = eth;
 557         miiphy_register(dev->name, bb_miiphy_read, bb_miiphy_write);
 558
 559         if (!eth_getenv_enetaddr("ethaddr", dev->enetaddr))
 560                 puts("Please set MAC address\n");
 561
 562         return ret;
 563
 564 err:
 565         if (dev)
 566                 free(dev);
 567
 568         if (eth)
 569                 free(eth);
 570
 571         printf(SHETHER_NAME ": Failed\n");
 572         return ret;
 573 }
 574
 575 /******* for bb_miiphy *******/
 576 static int sh_eth_bb_init(struct bb_miiphy_bus *bus)
 577 {
 578         return 0;
 579 }
 580
 581 static int sh_eth_bb_mdio_active(struct bb_miiphy_bus *bus)
 582 {
 583         struct sh_eth_dev *eth = bus->priv;
 584
 585         sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MMD, PIR);
 586
 587         return 0;
 588 }
 589
 590 static int sh_eth_bb_mdio_tristate(struct bb_miiphy_bus *bus)
 591 {
 592         struct sh_eth_dev *eth = bus->priv;
 593
 594         sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MMD, PIR);
 595
 596         return 0;
 597 }
 598
 599 static int sh_eth_bb_set_mdio(struct bb_miiphy_bus *bus, int v)
 600 {
 601         struct sh_eth_dev *eth = bus->priv;
 602
 603         if (v)
 604                 sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MDO, PIR);
 605         else
 606                 sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MDO, PIR);
 607
 608         return 0;
 609 }
 610
 611 static int sh_eth_bb_get_mdio(struct bb_miiphy_bus *bus, int *v)
 612 {
 613         struct sh_eth_dev *eth = bus->priv;
 614
 615         *v = (sh_eth_read(eth, PIR) & PIR_MDI) >> 3;
 616
 617         return 0;
 618 }
 619
 620 static int sh_eth_bb_set_mdc(struct bb_miiphy_bus *bus, int v)
 621 {
 622         struct sh_eth_dev *eth = bus->priv;
 623
 624         if (v)
 625                 sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MDC, PIR);
 626         else
 627                 sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MDC, PIR);
 628
 629         return 0;
 630 }
 631
 632 static int sh_eth_bb_delay(struct bb_miiphy_bus *bus)
 633 {
 634         udelay(10);
 635
 636         return 0;
 637 }
 638
 639 struct bb_miiphy_bus bb_miiphy_buses[] = {
 640         {
 641                 .name           = "sh_eth",
 642                 .init           = sh_eth_bb_init,
 643                 .mdio_active    = sh_eth_bb_mdio_active,
 644                 .mdio_tristate  = sh_eth_bb_mdio_tristate,
 645                 .set_mdio       = sh_eth_bb_set_mdio,
 646                 .get_mdio       = sh_eth_bb_get_mdio,
 647                 .set_mdc        = sh_eth_bb_set_mdc,
 648                 .delay          = sh_eth_bb_delay,
 649         }
 650 };
 651 int bb_miiphy_buses_num = ARRAY_SIZE(bb_miiphy_buses);