drivers/net/dm9000x.c

   1 /*
   2   dm9000.c: Version 1.2 12/15/2003
   3
   4         A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
   5         Copyright (C) 1997  Sten Wang
   6
   7  * SPDX-License-Identifier:     GPL-2.0+
   8
   9   (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
  10
  11 V0.11   06/20/2001      REG_0A bit3=1, default enable BP with DA match
  12         06/22/2001      Support DM9801 progrmming
  13                         E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
  14                         E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
  15                 R17 = (R17 & 0xfff0) | NF + 3
  16                         E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
  17                 R17 = (R17 & 0xfff0) | NF
  18
  19 v1.00                   modify by simon 2001.9.5
  20                         change for kernel 2.4.x
  21
  22 v1.1   11/09/2001       fix force mode bug
  23
  24 v1.2   03/18/2003       Weilun Huang <weilun_huang@davicom.com.tw>:
  25                         Fixed phy reset.
  26                         Added tx/rx 32 bit mode.
  27                         Cleaned up for kernel merge.
  28
  29 --------------------------------------
  30
  31        12/15/2003       Initial port to u-boot by
  32                         Sascha Hauer <saschahauer@web.de>
  33
  34        06/03/2008       Remy Bohmer <linux@bohmer.net>
  35                         - Fixed the driver to work with DM9000A.
  36                           (check on ISR receive status bit before reading the
  37                           FIFO as described in DM9000 programming guide and
  38                           application notes)
  39                         - Added autodetect of databus width.
  40                         - Made debug code compile again.
  41                         - Adapt eth_send such that it matches the DM9000*
  42                           application notes. Needed to make it work properly
  43                           for DM9000A.
  44                         - Adapted reset procedure to match DM9000 application
  45                           notes (i.e. double reset)
  46                         - some minor code cleanups
  47                         These changes are tested with DM9000{A,EP,E} together
  48                         with a 200MHz Atmel AT91SAM9261 core
  49
  50 TODO: external MII is not functional, only internal at the moment.
  51 */
  52
  53 #include <common.h>
  54 #include <command.h>
  55 #include <net.h>
  56 #include <asm/io.h>
  57 #include <dm9000.h>
  58
  59 #include "dm9000x.h"
  60
  61 /* Board/System/Debug information/definition ---------------- */
  62
  63 /* #define CONFIG_DM9000_DEBUG */
  64
  65 #ifdef CONFIG_DM9000_DEBUG
  66 #define DM9000_DBG(fmt,args...) printf(fmt, ##args)
  67 #define DM9000_DMP_PACKET(func,packet,length)  \
  68         do { \
  69                 int i;                                                  \
  70                 printf("%s: length: %d\n", func, length);               \
  71                 for (i = 0; i < length; i++) {                          \
  72                         if (i % 8 == 0)                                 \
  73                                 printf("\n%s: %02x: ", func, i);        \
  74                         printf("%02x ", ((unsigned char *) packet)[i]); \
  75                 } printf("\n");                                         \
  76         } while(0)
  77 #else
  78 #define DM9000_DBG(fmt,args...)
  79 #define DM9000_DMP_PACKET(func,packet,length)
  80 #endif
  81
  82 /* Structure/enum declaration ------------------------------- */
  83 typedef struct board_info {
  84         u32 runt_length_counter;        /* counter: RX length < 64byte */
  85         u32 long_length_counter;        /* counter: RX length > 1514byte */
  86         u32 reset_counter;      /* counter: RESET */
  87         u32 reset_tx_timeout;   /* RESET caused by TX Timeout */
  88         u32 reset_rx_status;    /* RESET caused by RX Statsus wrong */
  89         u16 tx_pkt_cnt;
  90         u16 queue_start_addr;
  91         u16 dbug_cnt;
  92         u8 phy_addr;
  93         u8 device_wait_reset;   /* device state */
  94         unsigned char srom[128];
  95         void (*outblk)(volatile void *data_ptr, int count);
  96         void (*inblk)(void *data_ptr, int count);
  97         void (*rx_status)(u16 *RxStatus, u16 *RxLen);
  98         struct eth_device netdev;
  99 } board_info_t;
 100 static board_info_t dm9000_info;
 101
 102
 103 /* function declaration ------------------------------------- */
 104 static int dm9000_probe(void);
 105 static u16 dm9000_phy_read(int);
 106 static void dm9000_phy_write(int, u16);
 107 static u8 DM9000_ior(int);
 108 static void DM9000_iow(int reg, u8 value);
 109
 110 /* DM9000 network board routine ---------------------------- */
 111 #ifndef CONFIG_DM9000_BYTE_SWAPPED
 112 #define DM9000_outb(d,r) writeb(d, (volatile u8 *)(r))
 113 #define DM9000_outw(d,r) writew(d, (volatile u16 *)(r))
 114 #define DM9000_outl(d,r) writel(d, (volatile u32 *)(r))
 115 #define DM9000_inb(r) readb((volatile u8 *)(r))
 116 #define DM9000_inw(r) readw((volatile u16 *)(r))
 117 #define DM9000_inl(r) readl((volatile u32 *)(r))
 118 #else
 119 #define DM9000_outb(d, r) __raw_writeb(d, r)
 120 #define DM9000_outw(d, r) __raw_writew(d, r)
 121 #define DM9000_outl(d, r) __raw_writel(d, r)
 122 #define DM9000_inb(r) __raw_readb(r)
 123 #define DM9000_inw(r) __raw_readw(r)
 124 #define DM9000_inl(r) __raw_readl(r)
 125 #endif
 126
 127 #ifdef CONFIG_DM9000_DEBUG
 128 static void
 129 dump_regs(void)
 130 {
 131         DM9000_DBG("\n");
 132         DM9000_DBG("NCR   (0x00): %02x\n", DM9000_ior(0));
 133         DM9000_DBG("NSR   (0x01): %02x\n", DM9000_ior(1));
 134         DM9000_DBG("TCR   (0x02): %02x\n", DM9000_ior(2));
 135         DM9000_DBG("TSRI  (0x03): %02x\n", DM9000_ior(3));
 136         DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));
 137         DM9000_DBG("RCR   (0x05): %02x\n", DM9000_ior(5));
 138         DM9000_DBG("RSR   (0x06): %02x\n", DM9000_ior(6));
 139         DM9000_DBG("ISR   (0xFE): %02x\n", DM9000_ior(DM9000_ISR));
 140         DM9000_DBG("\n");
 141 }
 142 #endif
 143
 144 static void dm9000_outblk_8bit(volatile void *data_ptr, int count)
 145 {
 146         int i;
 147         for (i = 0; i < count; i++)
 148                 DM9000_outb((((u8 *) data_ptr)[i] & 0xff), DM9000_DATA);
 149 }
 150
 151 static void dm9000_outblk_16bit(volatile void *data_ptr, int count)
 152 {
 153         int i;
 154         u32 tmplen = (count + 1) / 2;
 155
 156         for (i = 0; i < tmplen; i++)
 157                 DM9000_outw(((u16 *) data_ptr)[i], DM9000_DATA);
 158 }
 159 static void dm9000_outblk_32bit(volatile void *data_ptr, int count)
 160 {
 161         int i;
 162         u32 tmplen = (count + 3) / 4;
 163
 164         for (i = 0; i < tmplen; i++)
 165                 DM9000_outl(((u32 *) data_ptr)[i], DM9000_DATA);
 166 }
 167
 168 static void dm9000_inblk_8bit(void *data_ptr, int count)
 169 {
 170         int i;
 171         for (i = 0; i < count; i++)
 172                 ((u8 *) data_ptr)[i] = DM9000_inb(DM9000_DATA);
 173 }
 174
 175 static void dm9000_inblk_16bit(void *data_ptr, int count)
 176 {
 177         int i;
 178         u32 tmplen = (count + 1) / 2;
 179
 180         for (i = 0; i < tmplen; i++)
 181                 ((u16 *) data_ptr)[i] = DM9000_inw(DM9000_DATA);
 182 }
 183 static void dm9000_inblk_32bit(void *data_ptr, int count)
 184 {
 185         int i;
 186         u32 tmplen = (count + 3) / 4;
 187
 188         for (i = 0; i < tmplen; i++)
 189                 ((u32 *) data_ptr)[i] = DM9000_inl(DM9000_DATA);
 190 }
 191
 192 static void dm9000_rx_status_32bit(u16 *RxStatus, u16 *RxLen)
 193 {
 194         u32 tmpdata;
 195
 196         DM9000_outb(DM9000_MRCMD, DM9000_IO);
 197
 198         tmpdata = DM9000_inl(DM9000_DATA);
 199         *RxStatus = __le16_to_cpu(tmpdata);
 200         *RxLen = __le16_to_cpu(tmpdata >> 16);
 201 }
 202
 203 static void dm9000_rx_status_16bit(u16 *RxStatus, u16 *RxLen)
 204 {
 205         DM9000_outb(DM9000_MRCMD, DM9000_IO);
 206
 207         *RxStatus = __le16_to_cpu(DM9000_inw(DM9000_DATA));
 208         *RxLen = __le16_to_cpu(DM9000_inw(DM9000_DATA));
 209 }
 210
 211 static void dm9000_rx_status_8bit(u16 *RxStatus, u16 *RxLen)
 212 {
 213         DM9000_outb(DM9000_MRCMD, DM9000_IO);
 214
 215         *RxStatus =
 216             __le16_to_cpu(DM9000_inb(DM9000_DATA) +
 217                           (DM9000_inb(DM9000_DATA) << 8));
 218         *RxLen =
 219             __le16_to_cpu(DM9000_inb(DM9000_DATA) +
 220                           (DM9000_inb(DM9000_DATA) << 8));
 221 }
 222
 223 /*
 224   Search DM9000 board, allocate space and register it
 225 */
 226 int
 227 dm9000_probe(void)
 228 {
 229         u32 id_val;
 230         id_val = DM9000_ior(DM9000_VIDL);
 231         id_val |= DM9000_ior(DM9000_VIDH) << 8;
 232         id_val |= DM9000_ior(DM9000_PIDL) << 16;
 233         id_val |= DM9000_ior(DM9000_PIDH) << 24;
 234         if (id_val == DM9000_ID) {
 235                 printf("dm9000 i/o: 0x%x, id: 0x%x \n", CONFIG_DM9000_BASE,
 236                        id_val);
 237                 return 0;
 238         } else {
 239                 printf("dm9000 not found at 0x%08x id: 0x%08x\n",
 240                        CONFIG_DM9000_BASE, id_val);
 241                 return -1;
 242         }
 243 }
 244
 245 /* General Purpose dm9000 reset routine */
 246 static void
 247 dm9000_reset(void)
 248 {
 249         DM9000_DBG("resetting DM9000\n");
 250
 251         /* Reset DM9000,
 252            see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 */
 253
 254         /* DEBUG: Make all GPIO0 outputs, all others inputs */
 255         DM9000_iow(DM9000_GPCR, GPCR_GPIO0_OUT);
 256         /* Step 1: Power internal PHY by writing 0 to GPIO0 pin */
 257         DM9000_iow(DM9000_GPR, 0);
 258         /* Step 2: Software reset */
 259         DM9000_iow(DM9000_NCR, (NCR_LBK_INT_MAC | NCR_RST));
 260
 261         do {
 262                 DM9000_DBG("resetting the DM9000, 1st reset\n");
 263                 udelay(25); /* Wait at least 20 us */
 264         } while (DM9000_ior(DM9000_NCR) & 1);
 265
 266         DM9000_iow(DM9000_NCR, 0);
 267         DM9000_iow(DM9000_NCR, (NCR_LBK_INT_MAC | NCR_RST)); /* Issue a second reset */
 268
 269         do {
 270                 DM9000_DBG("resetting the DM9000, 2nd reset\n");
 271                 udelay(25); /* Wait at least 20 us */
 272         } while (DM9000_ior(DM9000_NCR) & 1);
 273
 274         /* Check whether the ethernet controller is present */
 275         if ((DM9000_ior(DM9000_PIDL) != 0x0) ||
 276             (DM9000_ior(DM9000_PIDH) != 0x90))
 277                 printf("ERROR: resetting DM9000 -> not responding\n");
 278 }
 279
 280 /* Initialize dm9000 board
 281 */
 282 static int dm9000_init(struct eth_device *dev, bd_t *bd)
 283 {
 284         int i, oft, lnk;
 285         u8 io_mode;
 286         struct board_info *db = &dm9000_info;
 287
 288         DM9000_DBG("%s\n", __func__);
 289
 290         /* RESET device */
 291         dm9000_reset();
 292
 293         if (dm9000_probe() < 0)
 294                 return -1;
 295
 296         /* Auto-detect 8/16/32 bit mode, ISR Bit 6+7 indicate bus width */
 297         io_mode = DM9000_ior(DM9000_ISR) >> 6;
 298
 299         switch (io_mode) {
 300         case 0x0:  /* 16-bit mode */
 301                 printf("DM9000: running in 16 bit mode\n");
 302                 db->outblk    = dm9000_outblk_16bit;
 303                 db->inblk     = dm9000_inblk_16bit;
 304                 db->rx_status = dm9000_rx_status_16bit;
 305                 break;
 306         case 0x01:  /* 32-bit mode */
 307                 printf("DM9000: running in 32 bit mode\n");
 308                 db->outblk    = dm9000_outblk_32bit;
 309                 db->inblk     = dm9000_inblk_32bit;
 310                 db->rx_status = dm9000_rx_status_32bit;
 311                 break;
 312         case 0x02: /* 8 bit mode */
 313                 printf("DM9000: running in 8 bit mode\n");
 314                 db->outblk    = dm9000_outblk_8bit;
 315                 db->inblk     = dm9000_inblk_8bit;
 316                 db->rx_status = dm9000_rx_status_8bit;
 317                 break;
 318         default:
 319                 /* Assume 8 bit mode, will probably not work anyway */
 320                 printf("DM9000: Undefined IO-mode:0x%x\n", io_mode);
 321                 db->outblk    = dm9000_outblk_8bit;
 322                 db->inblk     = dm9000_inblk_8bit;
 323                 db->rx_status = dm9000_rx_status_8bit;
 324                 break;
 325         }
 326
 327         /* Program operating register, only internal phy supported */
 328         DM9000_iow(DM9000_NCR, 0x0);
 329         /* TX Polling clear */
 330         DM9000_iow(DM9000_TCR, 0);
 331         /* Less 3Kb, 200us */
 332         DM9000_iow(DM9000_BPTR, BPTR_BPHW(3) | BPTR_JPT_600US);
 333         /* Flow Control : High/Low Water */
 334         DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8));
 335         /* SH FIXME: This looks strange! Flow Control */
 336         DM9000_iow(DM9000_FCR, 0x0);
 337         /* Special Mode */
 338         DM9000_iow(DM9000_SMCR, 0);
 339         /* clear TX status */
 340         DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
 341         /* Clear interrupt status */
 342         DM9000_iow(DM9000_ISR, ISR_ROOS | ISR_ROS | ISR_PTS | ISR_PRS);
 343
 344         printf("MAC: %pM\n", dev->enetaddr);
 345         if (!is_valid_ethaddr(dev->enetaddr)) {
 346 #ifdef CONFIG_RANDOM_MACADDR
 347                 printf("Bad MAC address (uninitialized EEPROM?), randomizing\n");
 348                 net_random_ethaddr(dev->enetaddr);
 349                 printf("MAC: %pM\n", dev->enetaddr);
 350 #else
 351                 printf("WARNING: Bad MAC address (uninitialized EEPROM?)\n");
 352 #endif
 353         }
 354
 355         /* fill device MAC address registers */
 356         for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
 357                 DM9000_iow(oft, dev->enetaddr[i]);
 358         for (i = 0, oft = 0x16; i < 8; i++, oft++)
 359                 DM9000_iow(oft, 0xff);
 360
 361         /* read back mac, just to be sure */
 362         for (i = 0, oft = 0x10; i < 6; i++, oft++)
 363                 DM9000_DBG("%02x:", DM9000_ior(oft));
 364         DM9000_DBG("\n");
 365
 366         /* Activate DM9000 */
 367         /* RX enable */
 368         DM9000_iow(DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
 369         /* Enable TX/RX interrupt mask */
 370         DM9000_iow(DM9000_IMR, IMR_PAR);
 371
 372         i = 0;
 373         while (!(dm9000_phy_read(1) & 0x20)) {  /* autonegation complete bit */
 374                 udelay(1000);
 375                 i++;
 376                 if (i == 10000) {
 377                         printf("could not establish link\n");
 378                         return 0;
 379                 }
 380         }
 381
 382         /* see what we've got */
 383         lnk = dm9000_phy_read(17) >> 12;
 384         printf("operating at ");
 385         switch (lnk) {
 386         case 1:
 387                 printf("10M half duplex ");
 388                 break;
 389         case 2:
 390                 printf("10M full duplex ");
 391                 break;
 392         case 4:
 393                 printf("100M half duplex ");
 394                 break;
 395         case 8:
 396                 printf("100M full duplex ");
 397                 break;
 398         default:
 399                 printf("unknown: %d ", lnk);
 400                 break;
 401         }
 402         printf("mode\n");
 403         return 0;
 404 }
 405
 406 /*
 407   Hardware start transmission.
 408   Send a packet to media from the upper layer.
 409 */
 410 static int dm9000_send(struct eth_device *netdev, void *packet, int length)
 411 {
 412         int tmo;
 413         struct board_info *db = &dm9000_info;
 414
 415         DM9000_DMP_PACKET(__func__ , packet, length);
 416
 417         DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
 418
 419         /* Move data to DM9000 TX RAM */
 420         DM9000_outb(DM9000_MWCMD, DM9000_IO); /* Prepare for TX-data */
 421
 422         /* push the data to the TX-fifo */
 423         (db->outblk)(packet, length);
 424
 425         /* Set TX length to DM9000 */
 426         DM9000_iow(DM9000_TXPLL, length & 0xff);
 427         DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
 428
 429         /* Issue TX polling command */
 430         DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
 431
 432         /* wait for end of transmission */
 433         tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
 434         while ( !(DM9000_ior(DM9000_NSR) & (NSR_TX1END | NSR_TX2END)) ||
 435                 !(DM9000_ior(DM9000_ISR) & IMR_PTM) ) {
 436                 if (get_timer(0) >= tmo) {
 437                         printf("transmission timeout\n");
 438                         break;
 439                 }
 440         }
 441         DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
 442
 443         DM9000_DBG("transmit done\n\n");
 444         return 0;
 445 }
 446
 447 /*
 448   Stop the interface.
 449   The interface is stopped when it is brought.
 450 */
 451 static void dm9000_halt(struct eth_device *netdev)
 452 {
 453         DM9000_DBG("%s\n", __func__);
 454
 455         /* RESET devie */
 456         dm9000_phy_write(0, 0x8000);    /* PHY RESET */
 457         DM9000_iow(DM9000_GPR, 0x01);   /* Power-Down PHY */
 458         DM9000_iow(DM9000_IMR, 0x80);   /* Disable all interrupt */
 459         DM9000_iow(DM9000_RCR, 0x00);   /* Disable RX */
 460 }
 461
 462 /*
 463   Received a packet and pass to upper layer
 464 */
 465 static int dm9000_rx(struct eth_device *netdev)
 466 {
 467         u8 rxbyte;
 468         u8 *rdptr = (u8 *)net_rx_packets[0];
 469         u16 RxStatus, RxLen = 0;
 470         struct board_info *db = &dm9000_info;
 471
 472         /* Check packet ready or not, we must check
 473            the ISR status first for DM9000A */
 474         if (!(DM9000_ior(DM9000_ISR) & 0x01)) /* Rx-ISR bit must be set. */
 475                 return 0;
 476
 477         DM9000_iow(DM9000_ISR, 0x01); /* clear PR status latched in bit 0 */
 478
 479         /* There is _at least_ 1 package in the fifo, read them all */
 480         for (;;) {
 481                 DM9000_ior(DM9000_MRCMDX);      /* Dummy read */
 482
 483                 /* Get most updated data,
 484                    only look at bits 0:1, See application notes DM9000 */
 485                 rxbyte = DM9000_inb(DM9000_DATA) & 0x03;
 486
 487                 /* Status check: this byte must be 0 or 1 */
 488                 if (rxbyte > DM9000_PKT_RDY) {
 489                         DM9000_iow(DM9000_RCR, 0x00);   /* Stop Device */
 490                         DM9000_iow(DM9000_ISR, 0x80);   /* Stop INT request */
 491                         printf("DM9000 error: status check fail: 0x%x\n",
 492                                 rxbyte);
 493                         return 0;
 494                 }
 495
 496                 if (rxbyte != DM9000_PKT_RDY)
 497                         return 0; /* No packet received, ignore */
 498
 499                 DM9000_DBG("receiving packet\n");
 500
 501                 /* A packet ready now  & Get status/length */
 502                 (db->rx_status)(&RxStatus, &RxLen);
 503
 504                 DM9000_DBG("rx status: 0x%04x rx len: %d\n", RxStatus, RxLen);
 505
 506                 /* Move data from DM9000 */
 507                 /* Read received packet from RX SRAM */
 508                 (db->inblk)(rdptr, RxLen);
 509
 510                 if ((RxStatus & 0xbf00) || (RxLen < 0x40)
 511                         || (RxLen > DM9000_PKT_MAX)) {
 512                         if (RxStatus & 0x100) {
 513                                 printf("rx fifo error\n");
 514                         }
 515                         if (RxStatus & 0x200) {
 516                                 printf("rx crc error\n");
 517                         }
 518                         if (RxStatus & 0x8000) {
 519                                 printf("rx length error\n");
 520                         }
 521                         if (RxLen > DM9000_PKT_MAX) {
 522                                 printf("rx length too big\n");
 523                                 dm9000_reset();
 524                         }
 525                 } else {
 526                         DM9000_DMP_PACKET(__func__ , rdptr, RxLen);
 527
 528                         DM9000_DBG("passing packet to upper layer\n");
 529                         net_process_received_packet(net_rx_packets[0], RxLen);
 530                 }
 531         }
 532         return 0;
 533 }
 534
 535 /*
 536   Read a word data from SROM
 537 */
 538 #if !defined(CONFIG_DM9000_NO_SROM)
 539 void dm9000_read_srom_word(int offset, u8 *to)
 540 {
 541         DM9000_iow(DM9000_EPAR, offset);
 542         DM9000_iow(DM9000_EPCR, 0x4);
 543         udelay(8000);
 544         DM9000_iow(DM9000_EPCR, 0x0);
 545         to[0] = DM9000_ior(DM9000_EPDRL);
 546         to[1] = DM9000_ior(DM9000_EPDRH);
 547 }
 548
 549 void dm9000_write_srom_word(int offset, u16 val)
 550 {
 551         DM9000_iow(DM9000_EPAR, offset);
 552         DM9000_iow(DM9000_EPDRH, ((val >> 8) & 0xff));
 553         DM9000_iow(DM9000_EPDRL, (val & 0xff));
 554         DM9000_iow(DM9000_EPCR, 0x12);
 555         udelay(8000);
 556         DM9000_iow(DM9000_EPCR, 0);
 557 }
 558 #endif
 559
 560 static void dm9000_get_enetaddr(struct eth_device *dev)
 561 {
 562 #if !defined(CONFIG_DM9000_NO_SROM)
 563         int i;
 564         for (i = 0; i < 3; i++)
 565                 dm9000_read_srom_word(i, dev->enetaddr + (2 * i));
 566 #endif
 567 }
 568
 569 /*
 570    Read a byte from I/O port
 571 */
 572 static u8
 573 DM9000_ior(int reg)
 574 {
 575         DM9000_outb(reg, DM9000_IO);
 576         return DM9000_inb(DM9000_DATA);
 577 }
 578
 579 /*
 580    Write a byte to I/O port
 581 */
 582 static void
 583 DM9000_iow(int reg, u8 value)
 584 {
 585         DM9000_outb(reg, DM9000_IO);
 586         DM9000_outb(value, DM9000_DATA);
 587 }
 588
 589 /*
 590    Read a word from phyxcer
 591 */
 592 static u16
 593 dm9000_phy_read(int reg)
 594 {
 595         u16 val;
 596
 597         /* Fill the phyxcer register into REG_0C */
 598         DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
 599         DM9000_iow(DM9000_EPCR, 0xc);   /* Issue phyxcer read command */
 600         udelay(100);                    /* Wait read complete */
 601         DM9000_iow(DM9000_EPCR, 0x0);   /* Clear phyxcer read command */
 602         val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);
 603
 604         /* The read data keeps on REG_0D & REG_0E */
 605         DM9000_DBG("dm9000_phy_read(0x%x): 0x%x\n", reg, val);
 606         return val;
 607 }
 608
 609 /*
 610    Write a word to phyxcer
 611 */
 612 static void
 613 dm9000_phy_write(int reg, u16 value)
 614 {
 615
 616         /* Fill the phyxcer register into REG_0C */
 617         DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
 618
 619         /* Fill the written data into REG_0D & REG_0E */
 620         DM9000_iow(DM9000_EPDRL, (value & 0xff));
 621         DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));
 622         DM9000_iow(DM9000_EPCR, 0xa);   /* Issue phyxcer write command */
 623         udelay(500);                    /* Wait write complete */
 624         DM9000_iow(DM9000_EPCR, 0x0);   /* Clear phyxcer write command */
 625         DM9000_DBG("dm9000_phy_write(reg:0x%x, value:0x%x)\n", reg, value);
 626 }
 627
 628 int dm9000_initialize(bd_t *bis)
 629 {
 630         struct eth_device *dev = &(dm9000_info.netdev);
 631
 632         /* Load MAC address from EEPROM */
 633         dm9000_get_enetaddr(dev);
 634
 635         dev->init = dm9000_init;
 636         dev->halt = dm9000_halt;
 637         dev->send = dm9000_send;
 638         dev->recv = dm9000_rx;
 639         sprintf(dev->name, "dm9000");
 640
 641         eth_register(dev);
 642
 643         return 0;
 644 }