drivers/net/ethernet/renesas/sh_eth.h

   1 /*  SuperH Ethernet device driver
   2  *
   3  *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
   4  *  Copyright (C) 2008-2012 Renesas Solutions Corp.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms and conditions of the GNU General Public License,
   8  *  version 2, as published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope it will be useful, but WITHOUT
  11  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  *  more details.
  14  *
  15  *  The full GNU General Public License is included in this distribution in
  16  *  the file called "COPYING".
  17  */
  18
  19 #ifndef __SH_ETH_H__
  20 #define __SH_ETH_H__
  21
  22 #define CARDNAME        "sh-eth"
  23 #define TX_TIMEOUT      (5*HZ)
  24 #define TX_RING_SIZE    64      /* Tx ring size */
  25 #define RX_RING_SIZE    64      /* Rx ring size */
  26 #define TX_RING_MIN     64
  27 #define RX_RING_MIN     64
  28 #define TX_RING_MAX     1024
  29 #define RX_RING_MAX     1024
  30 #define PKT_BUF_SZ      1538
  31 #define SH_ETH_TSU_TIMEOUT_MS   500
  32 #define SH_ETH_TSU_CAM_ENTRIES  32
  33
  34 enum {
  35         /* E-DMAC registers */
  36         EDSR = 0,
  37         EDMR,
  38         EDTRR,
  39         EDRRR,
  40         EESR,
  41         EESIPR,
  42         TDLAR,
  43         TDFAR,
  44         TDFXR,
  45         TDFFR,
  46         RDLAR,
  47         RDFAR,
  48         RDFXR,
  49         RDFFR,
  50         TRSCER,
  51         RMFCR,
  52         TFTR,
  53         FDR,
  54         RMCR,
  55         EDOCR,
  56         TFUCR,
  57         RFOCR,
  58         RMIIMODE,
  59         FCFTR,
  60         RPADIR,
  61         TRIMD,
  62         RBWAR,
  63         TBRAR,
  64
  65         /* Ether registers */
  66         ECMR,
  67         ECSR,
  68         ECSIPR,
  69         PIR,
  70         PSR,
  71         RDMLR,
  72         PIPR,
  73         RFLR,
  74         IPGR,
  75         APR,
  76         MPR,
  77         PFTCR,
  78         PFRCR,
  79         RFCR,
  80         RFCF,
  81         TPAUSER,
  82         TPAUSECR,
  83         BCFR,
  84         BCFRR,
  85         GECMR,
  86         BCULR,
  87         MAHR,
  88         MALR,
  89         TROCR,
  90         CDCR,
  91         LCCR,
  92         CNDCR,
  93         CEFCR,
  94         FRECR,
  95         TSFRCR,
  96         TLFRCR,
  97         CERCR,
  98         CEECR,
  99         MAFCR,
 100         RTRATE,
 101         CSMR,
 102         RMII_MII,
 103
 104         /* TSU Absolute address */
 105         ARSTR,
 106         TSU_CTRST,
 107         TSU_FWEN0,
 108         TSU_FWEN1,
 109         TSU_FCM,
 110         TSU_BSYSL0,
 111         TSU_BSYSL1,
 112         TSU_PRISL0,
 113         TSU_PRISL1,
 114         TSU_FWSL0,
 115         TSU_FWSL1,
 116         TSU_FWSLC,
 117         TSU_QTAG0,
 118         TSU_QTAG1,
 119         TSU_QTAGM0,
 120         TSU_QTAGM1,
 121         TSU_FWSR,
 122         TSU_FWINMK,
 123         TSU_ADQT0,
 124         TSU_ADQT1,
 125         TSU_VTAG0,
 126         TSU_VTAG1,
 127         TSU_ADSBSY,
 128         TSU_TEN,
 129         TSU_POST1,
 130         TSU_POST2,
 131         TSU_POST3,
 132         TSU_POST4,
 133         TSU_ADRH0,
 134         TSU_ADRL0,
 135         TSU_ADRH31,
 136         TSU_ADRL31,
 137
 138         TXNLCR0,
 139         TXALCR0,
 140         RXNLCR0,
 141         RXALCR0,
 142         FWNLCR0,
 143         FWALCR0,
 144         TXNLCR1,
 145         TXALCR1,
 146         RXNLCR1,
 147         RXALCR1,
 148         FWNLCR1,
 149         FWALCR1,
 150
 151         /* This value must be written at last. */
 152         SH_ETH_MAX_REGISTER_OFFSET,
 153 };
 154
 155 enum {
 156         SH_ETH_REG_GIGABIT,
 157         SH_ETH_REG_FAST_RZ,
 158         SH_ETH_REG_FAST_RCAR,
 159         SH_ETH_REG_FAST_SH4,
 160         SH_ETH_REG_FAST_SH3_SH2
 161 };
 162
 163 /* Driver's parameters */
 164 #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
 165 #define SH4_SKB_RX_ALIGN        32
 166 #else
 167 #define SH2_SH3_SKB_RX_ALIGN    2
 168 #endif
 169
 170 /* Register's bits
 171  */
 172 /* EDSR : sh7734, sh7757, sh7763, r8a7740, and r7s72100 only */
 173 enum EDSR_BIT {
 174         EDSR_ENT = 0x01, EDSR_ENR = 0x02,
 175 };
 176 #define EDSR_ENALL (EDSR_ENT|EDSR_ENR)
 177
 178 /* GECMR : sh7734, sh7763 and r8a7740 only */
 179 enum GECMR_BIT {
 180         GECMR_10 = 0x0, GECMR_100 = 0x04, GECMR_1000 = 0x01,
 181 };
 182
 183 /* EDMR */
 184 enum DMAC_M_BIT {
 185         EDMR_EL = 0x40, /* Litte endian */
 186         EDMR_DL1 = 0x20, EDMR_DL0 = 0x10,
 187         EDMR_SRST_GETHER = 0x03,
 188         EDMR_SRST_ETHER = 0x01,
 189 };
 190
 191 /* EDTRR */
 192 enum DMAC_T_BIT {
 193         EDTRR_TRNS_GETHER = 0x03,
 194         EDTRR_TRNS_ETHER = 0x01,
 195 };
 196
 197 /* EDRRR */
 198 enum EDRRR_R_BIT {
 199         EDRRR_R = 0x01,
 200 };
 201
 202 /* TPAUSER */
 203 enum TPAUSER_BIT {
 204         TPAUSER_TPAUSE = 0x0000ffff,
 205         TPAUSER_UNLIMITED = 0,
 206 };
 207
 208 /* BCFR */
 209 enum BCFR_BIT {
 210         BCFR_RPAUSE = 0x0000ffff,
 211         BCFR_UNLIMITED = 0,
 212 };
 213
 214 /* PIR */
 215 enum PIR_BIT {
 216         PIR_MDI = 0x08, PIR_MDO = 0x04, PIR_MMD = 0x02, PIR_MDC = 0x01,
 217 };
 218
 219 /* PSR */
 220 enum PHY_STATUS_BIT { PHY_ST_LINK = 0x01, };
 221
 222 /* EESR */
 223 enum EESR_BIT {
 224         EESR_TWB1       = 0x80000000,
 225         EESR_TWB        = 0x40000000,   /* same as TWB0 */
 226         EESR_TC1        = 0x20000000,
 227         EESR_TUC        = 0x10000000,
 228         EESR_ROC        = 0x08000000,
 229         EESR_TABT       = 0x04000000,
 230         EESR_RABT       = 0x02000000,
 231         EESR_RFRMER     = 0x01000000,   /* same as RFCOF */
 232         EESR_ADE        = 0x00800000,
 233         EESR_ECI        = 0x00400000,
 234         EESR_FTC        = 0x00200000,   /* same as TC or TC0 */
 235         EESR_TDE        = 0x00100000,
 236         EESR_TFE        = 0x00080000,   /* same as TFUF */
 237         EESR_FRC        = 0x00040000,   /* same as FR */
 238         EESR_RDE        = 0x00020000,
 239         EESR_RFE        = 0x00010000,
 240         EESR_CND        = 0x00000800,
 241         EESR_DLC        = 0x00000400,
 242         EESR_CD         = 0x00000200,
 243         EESR_RTO        = 0x00000100,
 244         EESR_RMAF       = 0x00000080,
 245         EESR_CEEF       = 0x00000040,
 246         EESR_CELF       = 0x00000020,
 247         EESR_RRF        = 0x00000010,
 248         EESR_RTLF       = 0x00000008,
 249         EESR_RTSF       = 0x00000004,
 250         EESR_PRE        = 0x00000002,
 251         EESR_CERF       = 0x00000001,
 252 };
 253
 254 #define EESR_RX_CHECK           (EESR_FRC  | /* Frame recv */           \
 255                                  EESR_RMAF | /* Multicast address recv */ \
 256                                  EESR_RRF  | /* Bit frame recv */       \
 257                                  EESR_RTLF | /* Long frame recv */      \
 258                                  EESR_RTSF | /* Short frame recv */     \
 259                                  EESR_PRE  | /* PHY-LSI recv error */   \
 260                                  EESR_CERF)  /* Recv frame CRC error */
 261
 262 #define DEFAULT_TX_CHECK        (EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | \
 263                                  EESR_RTO)
 264 #define DEFAULT_EESR_ERR_CHECK  (EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE | \
 265                                  EESR_RDE | EESR_RFRMER | EESR_ADE | \
 266                                  EESR_TFE | EESR_TDE | EESR_ECI)
 267
 268 /* EESIPR */
 269 enum DMAC_IM_BIT {
 270         DMAC_M_TWB = 0x40000000, DMAC_M_TABT = 0x04000000,
 271         DMAC_M_RABT = 0x02000000,
 272         DMAC_M_RFRMER = 0x01000000, DMAC_M_ADF = 0x00800000,
 273         DMAC_M_ECI = 0x00400000, DMAC_M_FTC = 0x00200000,
 274         DMAC_M_TDE = 0x00100000, DMAC_M_TFE = 0x00080000,
 275         DMAC_M_FRC = 0x00040000, DMAC_M_RDE = 0x00020000,
 276         DMAC_M_RFE = 0x00010000, DMAC_M_TINT4 = 0x00000800,
 277         DMAC_M_TINT3 = 0x00000400, DMAC_M_TINT2 = 0x00000200,
 278         DMAC_M_TINT1 = 0x00000100, DMAC_M_RINT8 = 0x00000080,
 279         DMAC_M_RINT5 = 0x00000010, DMAC_M_RINT4 = 0x00000008,
 280         DMAC_M_RINT3 = 0x00000004, DMAC_M_RINT2 = 0x00000002,
 281         DMAC_M_RINT1 = 0x00000001,
 282 };
 283
 284 /* Receive descriptor bit */
 285 enum RD_STS_BIT {
 286         RD_RACT = 0x80000000, RD_RDEL = 0x40000000,
 287         RD_RFP1 = 0x20000000, RD_RFP0 = 0x10000000,
 288         RD_RFE = 0x08000000, RD_RFS10 = 0x00000200,
 289         RD_RFS9 = 0x00000100, RD_RFS8 = 0x00000080,
 290         RD_RFS7 = 0x00000040, RD_RFS6 = 0x00000020,
 291         RD_RFS5 = 0x00000010, RD_RFS4 = 0x00000008,
 292         RD_RFS3 = 0x00000004, RD_RFS2 = 0x00000002,
 293         RD_RFS1 = 0x00000001,
 294 };
 295 #define RDF1ST  RD_RFP1
 296 #define RDFEND  RD_RFP0
 297 #define RD_RFP  (RD_RFP1|RD_RFP0)
 298
 299 /* FCFTR */
 300 enum FCFTR_BIT {
 301         FCFTR_RFF2 = 0x00040000, FCFTR_RFF1 = 0x00020000,
 302         FCFTR_RFF0 = 0x00010000, FCFTR_RFD2 = 0x00000004,
 303         FCFTR_RFD1 = 0x00000002, FCFTR_RFD0 = 0x00000001,
 304 };
 305 #define DEFAULT_FIFO_F_D_RFF    (FCFTR_RFF2 | FCFTR_RFF1 | FCFTR_RFF0)
 306 #define DEFAULT_FIFO_F_D_RFD    (FCFTR_RFD2 | FCFTR_RFD1 | FCFTR_RFD0)
 307
 308 /* Transmit descriptor bit */
 309 enum TD_STS_BIT {
 310         TD_TACT = 0x80000000, TD_TDLE = 0x40000000,
 311         TD_TFP1 = 0x20000000, TD_TFP0 = 0x10000000,
 312         TD_TFE  = 0x08000000, TD_TWBI = 0x04000000,
 313 };
 314 #define TDF1ST  TD_TFP1
 315 #define TDFEND  TD_TFP0
 316 #define TD_TFP  (TD_TFP1|TD_TFP0)
 317
 318 /* RMCR */
 319 enum RMCR_BIT {
 320         RMCR_RNC = 0x00000001,
 321 };
 322
 323 /* ECMR */
 324 enum FELIC_MODE_BIT {
 325         ECMR_TRCCM = 0x04000000, ECMR_RCSC = 0x00800000,
 326         ECMR_DPAD = 0x00200000, ECMR_RZPF = 0x00100000,
 327         ECMR_ZPF = 0x00080000, ECMR_PFR = 0x00040000, ECMR_RXF = 0x00020000,
 328         ECMR_TXF = 0x00010000, ECMR_MCT = 0x00002000, ECMR_PRCEF = 0x00001000,
 329         ECMR_PMDE = 0x00000200, ECMR_RE = 0x00000040, ECMR_TE = 0x00000020,
 330         ECMR_RTM = 0x00000010, ECMR_ILB = 0x00000008, ECMR_ELB = 0x00000004,
 331         ECMR_DM = 0x00000002, ECMR_PRM = 0x00000001,
 332 };
 333
 334 /* ECSR */
 335 enum ECSR_STATUS_BIT {
 336         ECSR_BRCRX = 0x20, ECSR_PSRTO = 0x10,
 337         ECSR_LCHNG = 0x04,
 338         ECSR_MPD = 0x02, ECSR_ICD = 0x01,
 339 };
 340
 341 #define DEFAULT_ECSR_INIT       (ECSR_BRCRX | ECSR_PSRTO | ECSR_LCHNG | \
 342                                  ECSR_ICD | ECSIPR_MPDIP)
 343
 344 /* ECSIPR */
 345 enum ECSIPR_STATUS_MASK_BIT {
 346         ECSIPR_BRCRXIP = 0x20, ECSIPR_PSRTOIP = 0x10,
 347         ECSIPR_LCHNGIP = 0x04,
 348         ECSIPR_MPDIP = 0x02, ECSIPR_ICDIP = 0x01,
 349 };
 350
 351 #define DEFAULT_ECSIPR_INIT     (ECSIPR_BRCRXIP | ECSIPR_PSRTOIP | \
 352                                  ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP)
 353
 354 /* APR */
 355 enum APR_BIT {
 356         APR_AP = 0x00000001,
 357 };
 358
 359 /* MPR */
 360 enum MPR_BIT {
 361         MPR_MP = 0x00000001,
 362 };
 363
 364 /* TRSCER */
 365 enum DESC_I_BIT {
 366         DESC_I_TINT4 = 0x0800, DESC_I_TINT3 = 0x0400, DESC_I_TINT2 = 0x0200,
 367         DESC_I_TINT1 = 0x0100, DESC_I_RINT8 = 0x0080, DESC_I_RINT5 = 0x0010,
 368         DESC_I_RINT4 = 0x0008, DESC_I_RINT3 = 0x0004, DESC_I_RINT2 = 0x0002,
 369         DESC_I_RINT1 = 0x0001,
 370 };
 371
 372 /* RPADIR */
 373 enum RPADIR_BIT {
 374         RPADIR_PADS1 = 0x20000, RPADIR_PADS0 = 0x10000,
 375         RPADIR_PADR = 0x0003f,
 376 };
 377
 378 /* FDR */
 379 #define DEFAULT_FDR_INIT        0x00000707
 380
 381 /* ARSTR */
 382 enum ARSTR_BIT { ARSTR_ARSTR = 0x00000001, };
 383
 384 /* TSU_FWEN0 */
 385 enum TSU_FWEN0_BIT {
 386         TSU_FWEN0_0 = 0x00000001,
 387 };
 388
 389 /* TSU_ADSBSY */
 390 enum TSU_ADSBSY_BIT {
 391         TSU_ADSBSY_0 = 0x00000001,
 392 };
 393
 394 /* TSU_TEN */
 395 enum TSU_TEN_BIT {
 396         TSU_TEN_0 = 0x80000000,
 397 };
 398
 399 /* TSU_FWSL0 */
 400 enum TSU_FWSL0_BIT {
 401         TSU_FWSL0_FW50 = 0x1000, TSU_FWSL0_FW40 = 0x0800,
 402         TSU_FWSL0_FW30 = 0x0400, TSU_FWSL0_FW20 = 0x0200,
 403         TSU_FWSL0_FW10 = 0x0100, TSU_FWSL0_RMSA0 = 0x0010,
 404 };
 405
 406 /* TSU_FWSLC */
 407 enum TSU_FWSLC_BIT {
 408         TSU_FWSLC_POSTENU = 0x2000, TSU_FWSLC_POSTENL = 0x1000,
 409         TSU_FWSLC_CAMSEL03 = 0x0080, TSU_FWSLC_CAMSEL02 = 0x0040,
 410         TSU_FWSLC_CAMSEL01 = 0x0020, TSU_FWSLC_CAMSEL00 = 0x0010,
 411         TSU_FWSLC_CAMSEL13 = 0x0008, TSU_FWSLC_CAMSEL12 = 0x0004,
 412         TSU_FWSLC_CAMSEL11 = 0x0002, TSU_FWSLC_CAMSEL10 = 0x0001,
 413 };
 414
 415 /* TSU_VTAGn */
 416 #define TSU_VTAG_ENABLE         0x80000000
 417 #define TSU_VTAG_VID_MASK       0x00000fff
 418
 419 /* The sh ether Tx buffer descriptors.
 420  * This structure should be 20 bytes.
 421  */
 422 struct sh_eth_txdesc {
 423         u32 status;             /* TD0 */
 424 #if defined(__LITTLE_ENDIAN)
 425         u16 pad0;               /* TD1 */
 426         u16 buffer_length;      /* TD1 */
 427 #else
 428         u16 buffer_length;      /* TD1 */
 429         u16 pad0;               /* TD1 */
 430 #endif
 431         u32 addr;               /* TD2 */
 432         u32 pad1;               /* padding data */
 433 } __aligned(2) __packed;
 434
 435 /* The sh ether Rx buffer descriptors.
 436  * This structure should be 20 bytes.
 437  */
 438 struct sh_eth_rxdesc {
 439         u32 status;             /* RD0 */
 440 #if defined(__LITTLE_ENDIAN)
 441         u16 frame_length;       /* RD1 */
 442         u16 buffer_length;      /* RD1 */
 443 #else
 444         u16 buffer_length;      /* RD1 */
 445         u16 frame_length;       /* RD1 */
 446 #endif
 447         u32 addr;               /* RD2 */
 448         u32 pad0;               /* padding data */
 449 } __aligned(2) __packed;
 450
 451 /* This structure is used by each CPU dependency handling. */
 452 struct sh_eth_cpu_data {
 453         /* optional functions */
 454         void (*chip_reset)(struct net_device *ndev);
 455         void (*set_duplex)(struct net_device *ndev);
 456         void (*set_rate)(struct net_device *ndev);
 457
 458         /* mandatory initialize value */
 459         int register_type;
 460         unsigned long eesipr_value;
 461
 462         /* optional initialize value */
 463         unsigned long ecsr_value;
 464         unsigned long ecsipr_value;
 465         unsigned long fdr_value;
 466         unsigned long fcftr_value;
 467         unsigned long rpadir_value;
 468
 469         /* interrupt checking mask */
 470         unsigned long tx_check;
 471         unsigned long eesr_err_check;
 472
 473         /* hardware features */
 474         unsigned long irq_flags; /* IRQ configuration flags */
 475         unsigned no_psr:1;      /* EtherC DO NOT have PSR */
 476         unsigned apr:1;         /* EtherC have APR */
 477         unsigned mpr:1;         /* EtherC have MPR */
 478         unsigned tpauser:1;     /* EtherC have TPAUSER */
 479         unsigned bculr:1;       /* EtherC have BCULR */
 480         unsigned tsu:1;         /* EtherC have TSU */
 481         unsigned hw_swap:1;     /* E-DMAC have DE bit in EDMR */
 482         unsigned rpadir:1;      /* E-DMAC have RPADIR */
 483         unsigned no_trimd:1;    /* E-DMAC DO NOT have TRIMD */
 484         unsigned no_ade:1;      /* E-DMAC DO NOT have ADE bit in EESR */
 485         unsigned hw_crc:1;      /* E-DMAC have CSMR */
 486         unsigned select_mii:1;  /* EtherC have RMII_MII (MII select register) */
 487         unsigned shift_rd0:1;   /* shift Rx descriptor word 0 right by 16 */
 488         unsigned rmiimode:1;    /* EtherC has RMIIMODE register */
 489 };
 490
 491 struct sh_eth_private {
 492         struct platform_device *pdev;
 493         struct sh_eth_cpu_data *cd;
 494         const u16 *reg_offset;
 495         void __iomem *addr;
 496         void __iomem *tsu_addr;
 497         u32 num_rx_ring;
 498         u32 num_tx_ring;
 499         dma_addr_t rx_desc_dma;
 500         dma_addr_t tx_desc_dma;
 501         struct sh_eth_rxdesc *rx_ring;
 502         struct sh_eth_txdesc *tx_ring;
 503         struct sk_buff **rx_skbuff;
 504         struct sk_buff **tx_skbuff;
 505         spinlock_t lock;                /* Register access lock */
 506         u32 cur_rx, dirty_rx;           /* Producer/consumer ring indices */
 507         u32 cur_tx, dirty_tx;
 508         u32 rx_buf_sz;                  /* Based on MTU+slack. */
 509         int edmac_endian;
 510         struct napi_struct napi;
 511         /* MII transceiver section. */
 512         u32 phy_id;                     /* PHY ID */
 513         struct mii_bus *mii_bus;        /* MDIO bus control */
 514         struct phy_device *phydev;      /* PHY device control */
 515         int link;
 516         phy_interface_t phy_interface;
 517         int msg_enable;
 518         int speed;
 519         int duplex;
 520         int port;                       /* for TSU */
 521         int vlan_num_ids;               /* for VLAN tag filter */
 522
 523         unsigned no_ether_link:1;
 524         unsigned ether_link_active_low:1;
 525 };
 526
 527 static inline void sh_eth_soft_swap(char *src, int len)
 528 {
 529 #ifdef __LITTLE_ENDIAN__
 530         u32 *p = (u32 *)src;
 531         u32 *maxp;
 532         maxp = p + ((len + sizeof(u32) - 1) / sizeof(u32));
 533
 534         for (; p < maxp; p++)
 535                 *p = swab32(*p);
 536 #endif
 537 }
 538
 539 static inline void sh_eth_write(struct net_device *ndev, unsigned long data,
 540                                 int enum_index)
 541 {
 542         struct sh_eth_private *mdp = netdev_priv(ndev);
 543
 544         iowrite32(data, mdp->addr + mdp->reg_offset[enum_index]);
 545 }
 546
 547 static inline unsigned long sh_eth_read(struct net_device *ndev,
 548                                         int enum_index)
 549 {
 550         struct sh_eth_private *mdp = netdev_priv(ndev);
 551
 552         return ioread32(mdp->addr + mdp->reg_offset[enum_index]);
 553 }
 554
 555 static inline void *sh_eth_tsu_get_offset(struct sh_eth_private *mdp,
 556                                           int enum_index)
 557 {
 558         return mdp->tsu_addr + mdp->reg_offset[enum_index];
 559 }
 560
 561 static inline void sh_eth_tsu_write(struct sh_eth_private *mdp,
 562                                 unsigned long data, int enum_index)
 563 {
 564         iowrite32(data, mdp->tsu_addr + mdp->reg_offset[enum_index]);
 565 }
 566
 567 static inline unsigned long sh_eth_tsu_read(struct sh_eth_private *mdp,
 568                                         int enum_index)
 569 {
 570         return ioread32(mdp->tsu_addr + mdp->reg_offset[enum_index]);
 571 }
 572
 573 #endif  /* #ifndef __SH_ETH_H__ */