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  * Copyright (C) 2013  Renesas Electronics Corporation
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <config.h>
  13 #include <common.h>
  14 #include <malloc.h>
  15 #include <net.h>
  16 #include <netdev.h>
  17 #include <miiphy.h>
  18 #include <asm/errno.h>
  19 #include <asm/io.h>
  20
  21 #include "sh_eth.h"
  22
  23 #ifndef CONFIG_SH_ETHER_USE_PORT
  24 # error "Please define CONFIG_SH_ETHER_USE_PORT"
  25 #endif
  26 #ifndef CONFIG_SH_ETHER_PHY_ADDR
  27 # error "Please define CONFIG_SH_ETHER_PHY_ADDR"
  28 #endif
  29
  30 #if defined(CONFIG_SH_ETHER_CACHE_WRITEBACK) && !defined(CONFIG_SYS_DCACHE_OFF)
  31 #define flush_cache_wback(addr, len)    \
  32                 flush_dcache_range((u32)addr, (u32)(addr + len - 1))
  33 #else
  34 #define flush_cache_wback(...)
  35 #endif
  36
  37 #if defined(CONFIG_SH_ETHER_CACHE_INVALIDATE) && defined(CONFIG_ARM)
  38 #define invalidate_cache(addr, len)             \
  39         {       \
  40                 u32 line_size = CONFIG_SH_ETHER_ALIGNE_SIZE;    \
  41                 u32 start, end; \
  42                 \
  43                 start = (u32)addr;      \
  44                 end = start + len;      \
  45                 start &= ~(line_size - 1);      \
  46                 end = ((end + line_size - 1) & ~(line_size - 1));       \
  47                 \
  48                 invalidate_dcache_range(start, end);    \
  49         }
  50 #else
  51 #define invalidate_cache(...)
  52 #endif
  53
  54 #define TIMEOUT_CNT 1000
  55
  56 int sh_eth_send(struct eth_device *dev, void *packet, int len)
  57 {
  58         struct sh_eth_dev *eth = dev->priv;
  59         int port = eth->port, ret = 0, timeout;
  60         struct sh_eth_info *port_info = &eth->port_info[port];
  61
  62         if (!packet || len > 0xffff) {
  63                 printf(SHETHER_NAME ": %s: Invalid argument\n", __func__);
  64                 ret = -EINVAL;
  65                 goto err;
  66         }
  67
  68         /* packet must be a 4 byte boundary */
  69         if ((int)packet & 3) {
  70                 printf(SHETHER_NAME ": %s: packet not 4 byte alligned\n"
  71                                 , __func__);
  72                 ret = -EFAULT;
  73                 goto err;
  74         }
  75
  76         /* Update tx descriptor */
  77         flush_cache_wback(packet, len);
  78         port_info->tx_desc_cur->td2 = ADDR_TO_PHY(packet);
  79         port_info->tx_desc_cur->td1 = len << 16;
  80         /* Must preserve the end of descriptor list indication */
  81         if (port_info->tx_desc_cur->td0 & TD_TDLE)
  82                 port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP | TD_TDLE;
  83         else
  84                 port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP;
  85
  86         /* Restart the transmitter if disabled */
  87         if (!(sh_eth_read(eth, EDTRR) & EDTRR_TRNS))
  88                 sh_eth_write(eth, EDTRR_TRNS, EDTRR);
  89
  90         /* Wait until packet is transmitted */
  91         timeout = TIMEOUT_CNT;
  92         do {
  93                 invalidate_cache(port_info->tx_desc_cur,
  94                                  sizeof(struct tx_desc_s));
  95                 udelay(100);
  96         } while (port_info->tx_desc_cur->td0 & TD_TACT && timeout--);
  97
  98         if (timeout < 0) {
  99                 printf(SHETHER_NAME ": transmit timeout\n");
 100                 ret = -ETIMEDOUT;
 101                 goto err;
 102         }
 103
 104         port_info->tx_desc_cur++;
 105         if (port_info->tx_desc_cur >= port_info->tx_desc_base + NUM_TX_DESC)
 106                 port_info->tx_desc_cur = port_info->tx_desc_base;
 107
 108 err:
 109         return ret;
 110 }
 111
 112 int sh_eth_recv(struct eth_device *dev)
 113 {
 114         struct sh_eth_dev *eth = dev->priv;
 115         int port = eth->port, len = 0;
 116         struct sh_eth_info *port_info = &eth->port_info[port];
 117         uchar *packet;
 118
 119         /* Check if the rx descriptor is ready */
 120         invalidate_cache(port_info->rx_desc_cur, sizeof(struct rx_desc_s));
 121         if (!(port_info->rx_desc_cur->rd0 & RD_RACT)) {
 122                 /* Check for errors */
 123                 if (!(port_info->rx_desc_cur->rd0 & RD_RFE)) {
 124                         len = port_info->rx_desc_cur->rd1 & 0xffff;
 125                         packet = (uchar *)
 126                                 ADDR_TO_P2(port_info->rx_desc_cur->rd2);
 127                         invalidate_cache(packet, len);
 128                         NetReceive(packet, len);
 129                 }
 130
 131                 /* Make current descriptor available again */
 132                 if (port_info->rx_desc_cur->rd0 & RD_RDLE)
 133                         port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE;
 134                 else
 135                         port_info->rx_desc_cur->rd0 = RD_RACT;
 136                 /* Point to the next descriptor */
 137                 port_info->rx_desc_cur++;
 138                 if (port_info->rx_desc_cur >=
 139                     port_info->rx_desc_base + NUM_RX_DESC)
 140                         port_info->rx_desc_cur = port_info->rx_desc_base;
 141         }
 142
 143         /* Restart the receiver if disabled */
 144         if (!(sh_eth_read(eth, EDRRR) & EDRRR_R))
 145                 sh_eth_write(eth, EDRRR_R, EDRRR);
 146
 147         return len;
 148 }
 149
 150 static int sh_eth_reset(struct sh_eth_dev *eth)
 151 {
 152 #if defined(SH_ETH_TYPE_GETHER) || defined(SH_ETH_TYPE_RZ)
 153         int ret = 0, i;
 154
 155         /* Start e-dmac transmitter and receiver */
 156         sh_eth_write(eth, EDSR_ENALL, EDSR);
 157
 158         /* Perform a software reset and wait for it to complete */
 159         sh_eth_write(eth, EDMR_SRST, EDMR);
 160         for (i = 0; i < TIMEOUT_CNT; i++) {
 161                 if (!(sh_eth_read(eth, EDMR) & EDMR_SRST))
 162                         break;
 163                 udelay(1000);
 164         }
 165
 166         if (i == TIMEOUT_CNT) {
 167                 printf(SHETHER_NAME  ": Software reset timeout\n");
 168                 ret = -EIO;
 169         }
 170
 171         return ret;
 172 #else
 173         sh_eth_write(eth, sh_eth_read(eth, EDMR) | EDMR_SRST, EDMR);
 174         udelay(3000);
 175         sh_eth_write(eth, sh_eth_read(eth, EDMR) & ~EDMR_SRST, EDMR);
 176
 177         return 0;
 178 #endif
 179 }
 180
 181 static int sh_eth_tx_desc_init(struct sh_eth_dev *eth)
 182 {
 183         int port = eth->port, i, ret = 0;
 184         u32 tmp_addr;
 185         struct sh_eth_info *port_info = &eth->port_info[port];
 186         struct tx_desc_s *cur_tx_desc;
 187
 188         /*
 189          * Allocate tx descriptors. They must be TX_DESC_SIZE bytes aligned
 190          */
 191         port_info->tx_desc_malloc = malloc(NUM_TX_DESC *
 192                                                  sizeof(struct tx_desc_s) +
 193                                                  TX_DESC_SIZE - 1);
 194         if (!port_info->tx_desc_malloc) {
 195                 printf(SHETHER_NAME ": malloc failed\n");
 196                 ret = -ENOMEM;
 197                 goto err;
 198         }
 199
 200         tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) &
 201                           ~(TX_DESC_SIZE - 1));
 202         flush_cache_wback(tmp_addr, NUM_TX_DESC * sizeof(struct tx_desc_s));
 203         /* Make sure we use a P2 address (non-cacheable) */
 204         port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr);
 205         port_info->tx_desc_cur = port_info->tx_desc_base;
 206
 207         /* Initialize all descriptors */
 208         for (cur_tx_desc = port_info->tx_desc_base, i = 0; i < NUM_TX_DESC;
 209              cur_tx_desc++, i++) {
 210                 cur_tx_desc->td0 = 0x00;
 211                 cur_tx_desc->td1 = 0x00;
 212                 cur_tx_desc->td2 = 0x00;
 213         }
 214
 215         /* Mark the end of the descriptors */
 216         cur_tx_desc--;
 217         cur_tx_desc->td0 |= TD_TDLE;
 218
 219         /* Point the controller to the tx descriptor list. Must use physical
 220            addresses */
 221         sh_eth_write(eth, ADDR_TO_PHY(port_info->tx_desc_base), TDLAR);
 222 #if defined(SH_ETH_TYPE_GETHER) || defined(SH_ETH_TYPE_RZ)
 223         sh_eth_write(eth, ADDR_TO_PHY(port_info->tx_desc_base), TDFAR);
 224         sh_eth_write(eth, ADDR_TO_PHY(cur_tx_desc), TDFXR);
 225         sh_eth_write(eth, 0x01, TDFFR);/* Last discriptor bit */
 226 #endif
 227
 228 err:
 229         return ret;
 230 }
 231
 232 static int sh_eth_rx_desc_init(struct sh_eth_dev *eth)
 233 {
 234         int port = eth->port, i , ret = 0;
 235         struct sh_eth_info *port_info = &eth->port_info[port];
 236         struct rx_desc_s *cur_rx_desc;
 237         u32 tmp_addr;
 238         u8 *rx_buf;
 239
 240         /*
 241          * Allocate rx descriptors. They must be RX_DESC_SIZE bytes aligned
 242          */
 243         port_info->rx_desc_malloc = malloc(NUM_RX_DESC *
 244                                                  sizeof(struct rx_desc_s) +
 245                                                  RX_DESC_SIZE - 1);
 246         if (!port_info->rx_desc_malloc) {
 247                 printf(SHETHER_NAME ": malloc failed\n");
 248                 ret = -ENOMEM;
 249                 goto err;
 250         }
 251
 252         tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) &
 253                           ~(RX_DESC_SIZE - 1));
 254         flush_cache_wback(tmp_addr, NUM_RX_DESC * sizeof(struct rx_desc_s));
 255         /* Make sure we use a P2 address (non-cacheable) */
 256         port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr);
 257
 258         port_info->rx_desc_cur = port_info->rx_desc_base;
 259
 260         /*
 261          * Allocate rx data buffers. They must be 32 bytes aligned  and in
 262          * P2 area
 263          */
 264         port_info->rx_buf_malloc = malloc(
 265                 NUM_RX_DESC * MAX_BUF_SIZE + RX_BUF_ALIGNE_SIZE - 1);
 266         if (!port_info->rx_buf_malloc) {
 267                 printf(SHETHER_NAME ": malloc failed\n");
 268                 ret = -ENOMEM;
 269                 goto err_buf_malloc;
 270         }
 271
 272         tmp_addr = (u32)(((int)port_info->rx_buf_malloc
 273                           + (RX_BUF_ALIGNE_SIZE - 1)) &
 274                           ~(RX_BUF_ALIGNE_SIZE - 1));
 275         port_info->rx_buf_base = (u8 *)ADDR_TO_P2(tmp_addr);
 276
 277         /* Initialize all descriptors */
 278         for (cur_rx_desc = port_info->rx_desc_base,
 279              rx_buf = port_info->rx_buf_base, i = 0;
 280              i < NUM_RX_DESC; cur_rx_desc++, rx_buf += MAX_BUF_SIZE, i++) {
 281                 cur_rx_desc->rd0 = RD_RACT;
 282                 cur_rx_desc->rd1 = MAX_BUF_SIZE << 16;
 283                 cur_rx_desc->rd2 = (u32) ADDR_TO_PHY(rx_buf);
 284         }
 285
 286         /* Mark the end of the descriptors */
 287         cur_rx_desc--;
 288         cur_rx_desc->rd0 |= RD_RDLE;
 289
 290         /* Point the controller to the rx descriptor list */
 291         sh_eth_write(eth, ADDR_TO_PHY(port_info->rx_desc_base), RDLAR);
 292 #if defined(SH_ETH_TYPE_GETHER) || defined(SH_ETH_TYPE_RZ)
 293         sh_eth_write(eth, ADDR_TO_PHY(port_info->rx_desc_base), RDFAR);
 294         sh_eth_write(eth, ADDR_TO_PHY(cur_rx_desc), RDFXR);
 295         sh_eth_write(eth, RDFFR_RDLF, RDFFR);
 296 #endif
 297
 298         return ret;
 299
 300 err_buf_malloc:
 301         free(port_info->rx_desc_malloc);
 302         port_info->rx_desc_malloc = NULL;
 303
 304 err:
 305         return ret;
 306 }
 307
 308 static void sh_eth_tx_desc_free(struct sh_eth_dev *eth)
 309 {
 310         int port = eth->port;
 311         struct sh_eth_info *port_info = &eth->port_info[port];
 312
 313         if (port_info->tx_desc_malloc) {
 314                 free(port_info->tx_desc_malloc);
 315                 port_info->tx_desc_malloc = NULL;
 316         }
 317 }
 318
 319 static void sh_eth_rx_desc_free(struct sh_eth_dev *eth)
 320 {
 321         int port = eth->port;
 322         struct sh_eth_info *port_info = &eth->port_info[port];
 323
 324         if (port_info->rx_desc_malloc) {
 325                 free(port_info->rx_desc_malloc);
 326                 port_info->rx_desc_malloc = NULL;
 327         }
 328
 329         if (port_info->rx_buf_malloc) {
 330                 free(port_info->rx_buf_malloc);
 331                 port_info->rx_buf_malloc = NULL;
 332         }
 333 }
 334
 335 static int sh_eth_desc_init(struct sh_eth_dev *eth)
 336 {
 337         int ret = 0;
 338
 339         ret = sh_eth_tx_desc_init(eth);
 340         if (ret)
 341                 goto err_tx_init;
 342
 343         ret = sh_eth_rx_desc_init(eth);
 344         if (ret)
 345                 goto err_rx_init;
 346
 347         return ret;
 348 err_rx_init:
 349         sh_eth_tx_desc_free(eth);
 350
 351 err_tx_init:
 352         return ret;
 353 }
 354
 355 static int sh_eth_phy_config(struct sh_eth_dev *eth)
 356 {
 357         int port = eth->port, ret = 0;
 358         struct sh_eth_info *port_info = &eth->port_info[port];
 359         struct eth_device *dev = port_info->dev;
 360         struct phy_device *phydev;
 361
 362         phydev = phy_connect(
 363                         miiphy_get_dev_by_name(dev->name),
 364                         port_info->phy_addr, dev, CONFIG_SH_ETHER_PHY_MODE);
 365         port_info->phydev = phydev;
 366         phy_config(phydev);
 367
 368         return ret;
 369 }
 370
 371 static int sh_eth_config(struct sh_eth_dev *eth, bd_t *bd)
 372 {
 373         int port = eth->port, ret = 0;
 374         u32 val;
 375         struct sh_eth_info *port_info = &eth->port_info[port];
 376         struct eth_device *dev = port_info->dev;
 377         struct phy_device *phy;
 378
 379         /* Configure e-dmac registers */
 380         sh_eth_write(eth, (sh_eth_read(eth, EDMR) & ~EMDR_DESC_R) |
 381                         (EMDR_DESC | EDMR_EL), EDMR);
 382
 383         sh_eth_write(eth, 0, EESIPR);
 384         sh_eth_write(eth, 0, TRSCER);
 385         sh_eth_write(eth, 0, TFTR);
 386         sh_eth_write(eth, (FIFO_SIZE_T | FIFO_SIZE_R), FDR);
 387         sh_eth_write(eth, RMCR_RST, RMCR);
 388 #if defined(SH_ETH_TYPE_GETHER) || defined(SH_ETH_TYPE_RZ)
 389         sh_eth_write(eth, 0, RPADIR);
 390 #endif
 391         sh_eth_write(eth, (FIFO_F_D_RFF | FIFO_F_D_RFD), FCFTR);
 392
 393         /* Configure e-mac registers */
 394         sh_eth_write(eth, 0, ECSIPR);
 395
 396         /* Set Mac address */
 397         val = dev->enetaddr[0] << 24 | dev->enetaddr[1] << 16 |
 398             dev->enetaddr[2] << 8 | dev->enetaddr[3];
 399         sh_eth_write(eth, val, MAHR);
 400
 401         val = dev->enetaddr[4] << 8 | dev->enetaddr[5];
 402         sh_eth_write(eth, val, MALR);
 403
 404         sh_eth_write(eth, RFLR_RFL_MIN, RFLR);
 405 #if defined(SH_ETH_TYPE_GETHER)
 406         sh_eth_write(eth, 0, PIPR);
 407 #endif
 408 #if defined(SH_ETH_TYPE_GETHER) || defined(SH_ETH_TYPE_RZ)
 409         sh_eth_write(eth, APR_AP, APR);
 410         sh_eth_write(eth, MPR_MP, MPR);
 411         sh_eth_write(eth, TPAUSER_TPAUSE, TPAUSER);
 412 #endif
 413
 414 #if defined(CONFIG_CPU_SH7734) || defined(CONFIG_R8A7740)
 415         sh_eth_write(eth, CONFIG_SH_ETHER_SH7734_MII, RMII_MII);
 416 #elif defined(CONFIG_R8A7790) || defined(CONFIG_R8A7791)
 417         sh_eth_write(eth, sh_eth_read(eth, RMIIMR) | 0x1, RMIIMR);
 418 #endif
 419         /* Configure phy */
 420         ret = sh_eth_phy_config(eth);
 421         if (ret) {
 422                 printf(SHETHER_NAME ": phy config timeout\n");
 423                 goto err_phy_cfg;
 424         }
 425         phy = port_info->phydev;
 426         ret = phy_startup(phy);
 427         if (ret) {
 428                 printf(SHETHER_NAME ": phy startup failure\n");
 429                 return ret;
 430         }
 431
 432         val = 0;
 433
 434         /* Set the transfer speed */
 435         if (phy->speed == 100) {
 436                 printf(SHETHER_NAME ": 100Base/");
 437 #if defined(SH_ETH_TYPE_GETHER)
 438                 sh_eth_write(eth, GECMR_100B, GECMR);
 439 #elif defined(CONFIG_CPU_SH7757) || defined(CONFIG_CPU_SH7752)
 440                 sh_eth_write(eth, 1, RTRATE);
 441 #elif defined(CONFIG_CPU_SH7724) || defined(CONFIG_R8A7790) || \
 442                 defined(CONFIG_R8A7791)
 443                 val = ECMR_RTM;
 444 #endif
 445         } else if (phy->speed == 10) {
 446                 printf(SHETHER_NAME ": 10Base/");
 447 #if defined(SH_ETH_TYPE_GETHER)
 448                 sh_eth_write(eth, GECMR_10B, GECMR);
 449 #elif defined(CONFIG_CPU_SH7757) || defined(CONFIG_CPU_SH7752)
 450                 sh_eth_write(eth, 0, RTRATE);
 451 #endif
 452         }
 453 #if defined(SH_ETH_TYPE_GETHER)
 454         else if (phy->speed == 1000) {
 455                 printf(SHETHER_NAME ": 1000Base/");
 456                 sh_eth_write(eth, GECMR_1000B, GECMR);
 457         }
 458 #endif
 459
 460         /* Check if full duplex mode is supported by the phy */
 461         if (phy->duplex) {
 462                 printf("Full\n");
 463                 sh_eth_write(eth, val | (ECMR_CHG_DM|ECMR_RE|ECMR_TE|ECMR_DM),
 464                              ECMR);
 465         } else {
 466                 printf("Half\n");
 467                 sh_eth_write(eth, val | (ECMR_CHG_DM|ECMR_RE|ECMR_TE), ECMR);
 468         }
 469
 470         return ret;
 471
 472 err_phy_cfg:
 473         return ret;
 474 }
 475
 476 static void sh_eth_start(struct sh_eth_dev *eth)
 477 {
 478         /*
 479          * Enable the e-dmac receiver only. The transmitter will be enabled when
 480          * we have something to transmit
 481          */
 482         sh_eth_write(eth, EDRRR_R, EDRRR);
 483 }
 484
 485 static void sh_eth_stop(struct sh_eth_dev *eth)
 486 {
 487         sh_eth_write(eth, ~EDRRR_R, EDRRR);
 488 }
 489
 490 int sh_eth_init(struct eth_device *dev, bd_t *bd)
 491 {
 492         int ret = 0;
 493         struct sh_eth_dev *eth = dev->priv;
 494
 495         ret = sh_eth_reset(eth);
 496         if (ret)
 497                 goto err;
 498
 499         ret = sh_eth_desc_init(eth);
 500         if (ret)
 501                 goto err;
 502
 503         ret = sh_eth_config(eth, bd);
 504         if (ret)
 505                 goto err_config;
 506
 507         sh_eth_start(eth);
 508
 509         return ret;
 510
 511 err_config:
 512         sh_eth_tx_desc_free(eth);
 513         sh_eth_rx_desc_free(eth);
 514
 515 err:
 516         return ret;
 517 }
 518
 519 void sh_eth_halt(struct eth_device *dev)
 520 {
 521         struct sh_eth_dev *eth = dev->priv;
 522         sh_eth_stop(eth);
 523 }
 524
 525 int sh_eth_initialize(bd_t *bd)
 526 {
 527         int ret = 0;
 528         struct sh_eth_dev *eth = NULL;
 529         struct eth_device *dev = NULL;
 530
 531         eth = (struct sh_eth_dev *)malloc(sizeof(struct sh_eth_dev));
 532         if (!eth) {
 533                 printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
 534                 ret = -ENOMEM;
 535                 goto err;
 536         }
 537
 538         dev = (struct eth_device *)malloc(sizeof(struct eth_device));
 539         if (!dev) {
 540                 printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
 541                 ret = -ENOMEM;
 542                 goto err;
 543         }
 544         memset(dev, 0, sizeof(struct eth_device));
 545         memset(eth, 0, sizeof(struct sh_eth_dev));
 546
 547         eth->port = CONFIG_SH_ETHER_USE_PORT;
 548         eth->port_info[eth->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR;
 549
 550         dev->priv = (void *)eth;
 551         dev->iobase = 0;
 552         dev->init = sh_eth_init;
 553         dev->halt = sh_eth_halt;
 554         dev->send = sh_eth_send;
 555         dev->recv = sh_eth_recv;
 556         eth->port_info[eth->port].dev = dev;
 557
 558         sprintf(dev->name, SHETHER_NAME);
 559
 560         /* Register Device to EtherNet subsystem  */
 561         eth_register(dev);
 562
 563         bb_miiphy_buses[0].priv = eth;
 564         miiphy_register(dev->name, bb_miiphy_read, bb_miiphy_write);
 565
 566         if (!eth_getenv_enetaddr("ethaddr", dev->enetaddr))
 567                 puts("Please set MAC address\n");
 568
 569         return ret;
 570
 571 err:
 572         if (dev)
 573                 free(dev);
 574
 575         if (eth)
 576                 free(eth);
 577
 578         printf(SHETHER_NAME ": Failed\n");
 579         return ret;
 580 }
 581
 582 /******* for bb_miiphy *******/
 583 static int sh_eth_bb_init(struct bb_miiphy_bus *bus)
 584 {
 585         return 0;
 586 }
 587
 588 static int sh_eth_bb_mdio_active(struct bb_miiphy_bus *bus)
 589 {
 590         struct sh_eth_dev *eth = bus->priv;
 591
 592         sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MMD, PIR);
 593
 594         return 0;
 595 }
 596
 597 static int sh_eth_bb_mdio_tristate(struct bb_miiphy_bus *bus)
 598 {
 599         struct sh_eth_dev *eth = bus->priv;
 600
 601         sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MMD, PIR);
 602
 603         return 0;
 604 }
 605
 606 static int sh_eth_bb_set_mdio(struct bb_miiphy_bus *bus, int v)
 607 {
 608         struct sh_eth_dev *eth = bus->priv;
 609
 610         if (v)
 611                 sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MDO, PIR);
 612         else
 613                 sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MDO, PIR);
 614
 615         return 0;
 616 }
 617
 618 static int sh_eth_bb_get_mdio(struct bb_miiphy_bus *bus, int *v)
 619 {
 620         struct sh_eth_dev *eth = bus->priv;
 621
 622         *v = (sh_eth_read(eth, PIR) & PIR_MDI) >> 3;
 623
 624         return 0;
 625 }
 626
 627 static int sh_eth_bb_set_mdc(struct bb_miiphy_bus *bus, int v)
 628 {
 629         struct sh_eth_dev *eth = bus->priv;
 630
 631         if (v)
 632                 sh_eth_write(eth, sh_eth_read(eth, PIR) | PIR_MDC, PIR);
 633         else
 634                 sh_eth_write(eth, sh_eth_read(eth, PIR) & ~PIR_MDC, PIR);
 635
 636         return 0;
 637 }
 638
 639 static int sh_eth_bb_delay(struct bb_miiphy_bus *bus)
 640 {
 641         udelay(10);
 642
 643         return 0;
 644 }
 645
 646 struct bb_miiphy_bus bb_miiphy_buses[] = {
 647         {
 648                 .name           = "sh_eth",
 649                 .init           = sh_eth_bb_init,
 650                 .mdio_active    = sh_eth_bb_mdio_active,
 651                 .mdio_tristate  = sh_eth_bb_mdio_tristate,
 652                 .set_mdio       = sh_eth_bb_set_mdio,
 653                 .get_mdio       = sh_eth_bb_get_mdio,
 654                 .set_mdc        = sh_eth_bb_set_mdc,
 655                 .delay          = sh_eth_bb_delay,
 656         }
 657 };
 658 int bb_miiphy_buses_num = ARRAY_SIZE(bb_miiphy_buses);