drivers/net/macb.c

   1 /*
   2  * Copyright (C) 2005-2006 Atmel Corporation
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6 #include <common.h>
   7
   8 /*
   9  * The u-boot networking stack is a little weird.  It seems like the
  10  * networking core allocates receive buffers up front without any
  11  * regard to the hardware that's supposed to actually receive those
  12  * packets.
  13  *
  14  * The MACB receives packets into 128-byte receive buffers, so the
  15  * buffers allocated by the core isn't very practical to use.  We'll
  16  * allocate our own, but we need one such buffer in case a packet
  17  * wraps around the DMA ring so that we have to copy it.
  18  *
  19  * Therefore, define CONFIG_SYS_RX_ETH_BUFFER to 1 in the board-specific
  20  * configuration header.  This way, the core allocates one RX buffer
  21  * and one TX buffer, each of which can hold a ethernet packet of
  22  * maximum size.
  23  *
  24  * For some reason, the networking core unconditionally specifies a
  25  * 32-byte packet "alignment" (which really should be called
  26  * "padding").  MACB shouldn't need that, but we'll refrain from any
  27  * core modifications here...
  28  */
  29
  30 #include <net.h>
  31 #include <netdev.h>
  32 #include <malloc.h>
  33 #include <miiphy.h>
  34
  35 #include <linux/mii.h>
  36 #include <asm/io.h>
  37 #include <asm/dma-mapping.h>
  38 #include <asm/arch/clk.h>
  39
  40 #include "macb.h"
  41
  42 #define CONFIG_SYS_MACB_RX_BUFFER_SIZE          4096
  43 #define CONFIG_SYS_MACB_RX_RING_SIZE            (CONFIG_SYS_MACB_RX_BUFFER_SIZE / 128)
  44 #define CONFIG_SYS_MACB_TX_RING_SIZE            16
  45 #define CONFIG_SYS_MACB_TX_TIMEOUT              1000
  46 #define CONFIG_SYS_MACB_AUTONEG_TIMEOUT 5000000
  47
  48 struct macb_dma_desc {
  49         u32     addr;
  50         u32     ctrl;
  51 };
  52
  53 #define RXADDR_USED             0x00000001
  54 #define RXADDR_WRAP             0x00000002
  55
  56 #define RXBUF_FRMLEN_MASK       0x00000fff
  57 #define RXBUF_FRAME_START       0x00004000
  58 #define RXBUF_FRAME_END         0x00008000
  59 #define RXBUF_TYPEID_MATCH      0x00400000
  60 #define RXBUF_ADDR4_MATCH       0x00800000
  61 #define RXBUF_ADDR3_MATCH       0x01000000
  62 #define RXBUF_ADDR2_MATCH       0x02000000
  63 #define RXBUF_ADDR1_MATCH       0x04000000
  64 #define RXBUF_BROADCAST         0x80000000
  65
  66 #define TXBUF_FRMLEN_MASK       0x000007ff
  67 #define TXBUF_FRAME_END         0x00008000
  68 #define TXBUF_NOCRC             0x00010000
  69 #define TXBUF_EXHAUSTED         0x08000000
  70 #define TXBUF_UNDERRUN          0x10000000
  71 #define TXBUF_MAXRETRY          0x20000000
  72 #define TXBUF_WRAP              0x40000000
  73 #define TXBUF_USED              0x80000000
  74
  75 struct macb_device {
  76         void                    *regs;
  77
  78         unsigned int            rx_tail;
  79         unsigned int            tx_head;
  80         unsigned int            tx_tail;
  81
  82         void                    *rx_buffer;
  83         void                    *tx_buffer;
  84         struct macb_dma_desc    *rx_ring;
  85         struct macb_dma_desc    *tx_ring;
  86
  87         unsigned long           rx_buffer_dma;
  88         unsigned long           rx_ring_dma;
  89         unsigned long           tx_ring_dma;
  90
  91         const struct device     *dev;
  92         struct eth_device       netdev;
  93         unsigned short          phy_addr;
  94         struct mii_dev          *bus;
  95 };
  96 #define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
  97
  98 static int macb_is_gem(struct macb_device *macb)
  99 {
 100         return MACB_BFEXT(IDNUM, macb_readl(macb, MID)) == 0x2;
 101 }
 102
 103 static void macb_mdio_write(struct macb_device *macb, u8 reg, u16 value)
 104 {
 105         unsigned long netctl;
 106         unsigned long netstat;
 107         unsigned long frame;
 108
 109         netctl = macb_readl(macb, NCR);
 110         netctl |= MACB_BIT(MPE);
 111         macb_writel(macb, NCR, netctl);
 112
 113         frame = (MACB_BF(SOF, 1)
 114                  | MACB_BF(RW, 1)
 115                  | MACB_BF(PHYA, macb->phy_addr)
 116                  | MACB_BF(REGA, reg)
 117                  | MACB_BF(CODE, 2)
 118                  | MACB_BF(DATA, value));
 119         macb_writel(macb, MAN, frame);
 120
 121         do {
 122                 netstat = macb_readl(macb, NSR);
 123         } while (!(netstat & MACB_BIT(IDLE)));
 124
 125         netctl = macb_readl(macb, NCR);
 126         netctl &= ~MACB_BIT(MPE);
 127         macb_writel(macb, NCR, netctl);
 128 }
 129
 130 static u16 macb_mdio_read(struct macb_device *macb, u8 reg)
 131 {
 132         unsigned long netctl;
 133         unsigned long netstat;
 134         unsigned long frame;
 135
 136         netctl = macb_readl(macb, NCR);
 137         netctl |= MACB_BIT(MPE);
 138         macb_writel(macb, NCR, netctl);
 139
 140         frame = (MACB_BF(SOF, 1)
 141                  | MACB_BF(RW, 2)
 142                  | MACB_BF(PHYA, macb->phy_addr)
 143                  | MACB_BF(REGA, reg)
 144                  | MACB_BF(CODE, 2));
 145         macb_writel(macb, MAN, frame);
 146
 147         do {
 148                 netstat = macb_readl(macb, NSR);
 149         } while (!(netstat & MACB_BIT(IDLE)));
 150
 151         frame = macb_readl(macb, MAN);
 152
 153         netctl = macb_readl(macb, NCR);
 154         netctl &= ~MACB_BIT(MPE);
 155         macb_writel(macb, NCR, netctl);
 156
 157         return MACB_BFEXT(DATA, frame);
 158 }
 159
 160 void __weak arch_get_mdio_control(const char *name)
 161 {
 162         return;
 163 }
 164
 165 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
 166
 167 int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
 168 {
 169         struct eth_device *dev = eth_get_dev_by_name(devname);
 170         struct macb_device *macb = to_macb(dev);
 171
 172         if ( macb->phy_addr != phy_adr )
 173                 return -1;
 174
 175         arch_get_mdio_control(devname);
 176         *value = macb_mdio_read(macb, reg);
 177
 178         return 0;
 179 }
 180
 181 int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
 182 {
 183         struct eth_device *dev = eth_get_dev_by_name(devname);
 184         struct macb_device *macb = to_macb(dev);
 185
 186         if ( macb->phy_addr != phy_adr )
 187                 return -1;
 188
 189         arch_get_mdio_control(devname);
 190         macb_mdio_write(macb, reg, value);
 191
 192         return 0;
 193 }
 194 #endif
 195
 196
 197 #if defined(CONFIG_CMD_NET)
 198
 199 static int macb_send(struct eth_device *netdev, void *packet, int length)
 200 {
 201         struct macb_device *macb = to_macb(netdev);
 202         unsigned long paddr, ctrl;
 203         unsigned int tx_head = macb->tx_head;
 204         int i;
 205
 206         paddr = dma_map_single(packet, length, DMA_TO_DEVICE);
 207
 208         ctrl = length & TXBUF_FRMLEN_MASK;
 209         ctrl |= TXBUF_FRAME_END;
 210         if (tx_head == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) {
 211                 ctrl |= TXBUF_WRAP;
 212                 macb->tx_head = 0;
 213         } else
 214                 macb->tx_head++;
 215
 216         macb->tx_ring[tx_head].ctrl = ctrl;
 217         macb->tx_ring[tx_head].addr = paddr;
 218         barrier();
 219         macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
 220
 221         /*
 222          * I guess this is necessary because the networking core may
 223          * re-use the transmit buffer as soon as we return...
 224          */
 225         for (i = 0; i <= CONFIG_SYS_MACB_TX_TIMEOUT; i++) {
 226                 barrier();
 227                 ctrl = macb->tx_ring[tx_head].ctrl;
 228                 if (ctrl & TXBUF_USED)
 229                         break;
 230                 udelay(1);
 231         }
 232
 233         dma_unmap_single(packet, length, paddr);
 234
 235         if (i <= CONFIG_SYS_MACB_TX_TIMEOUT) {
 236                 if (ctrl & TXBUF_UNDERRUN)
 237                         printf("%s: TX underrun\n", netdev->name);
 238                 if (ctrl & TXBUF_EXHAUSTED)
 239                         printf("%s: TX buffers exhausted in mid frame\n",
 240                                netdev->name);
 241         } else {
 242                 printf("%s: TX timeout\n", netdev->name);
 243         }
 244
 245         /* No one cares anyway */
 246         return 0;
 247 }
 248
 249 static void reclaim_rx_buffers(struct macb_device *macb,
 250                                unsigned int new_tail)
 251 {
 252         unsigned int i;
 253
 254         i = macb->rx_tail;
 255         while (i > new_tail) {
 256                 macb->rx_ring[i].addr &= ~RXADDR_USED;
 257                 i++;
 258                 if (i > CONFIG_SYS_MACB_RX_RING_SIZE)
 259                         i = 0;
 260         }
 261
 262         while (i < new_tail) {
 263                 macb->rx_ring[i].addr &= ~RXADDR_USED;
 264                 i++;
 265         }
 266
 267         barrier();
 268         macb->rx_tail = new_tail;
 269 }
 270
 271 static int macb_recv(struct eth_device *netdev)
 272 {
 273         struct macb_device *macb = to_macb(netdev);
 274         unsigned int rx_tail = macb->rx_tail;
 275         void *buffer;
 276         int length;
 277         int wrapped = 0;
 278         u32 status;
 279
 280         for (;;) {
 281                 if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
 282                         return -1;
 283
 284                 status = macb->rx_ring[rx_tail].ctrl;
 285                 if (status & RXBUF_FRAME_START) {
 286                         if (rx_tail != macb->rx_tail)
 287                                 reclaim_rx_buffers(macb, rx_tail);
 288                         wrapped = 0;
 289                 }
 290
 291                 if (status & RXBUF_FRAME_END) {
 292                         buffer = macb->rx_buffer + 128 * macb->rx_tail;
 293                         length = status & RXBUF_FRMLEN_MASK;
 294                         if (wrapped) {
 295                                 unsigned int headlen, taillen;
 296
 297                                 headlen = 128 * (CONFIG_SYS_MACB_RX_RING_SIZE
 298                                                  - macb->rx_tail);
 299                                 taillen = length - headlen;
 300                                 memcpy((void *)NetRxPackets[0],
 301                                        buffer, headlen);
 302                                 memcpy((void *)NetRxPackets[0] + headlen,
 303                                        macb->rx_buffer, taillen);
 304                                 buffer = (void *)NetRxPackets[0];
 305                         }
 306
 307                         NetReceive(buffer, length);
 308                         if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE)
 309                                 rx_tail = 0;
 310                         reclaim_rx_buffers(macb, rx_tail);
 311                 } else {
 312                         if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) {
 313                                 wrapped = 1;
 314                                 rx_tail = 0;
 315                         }
 316                 }
 317                 barrier();
 318         }
 319
 320         return 0;
 321 }
 322
 323 static void macb_phy_reset(struct macb_device *macb)
 324 {
 325         struct eth_device *netdev = &macb->netdev;
 326         int i;
 327         u16 status, adv;
 328
 329         adv = ADVERTISE_CSMA | ADVERTISE_ALL;
 330         macb_mdio_write(macb, MII_ADVERTISE, adv);
 331         printf("%s: Starting autonegotiation...\n", netdev->name);
 332         macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
 333                                          | BMCR_ANRESTART));
 334
 335         for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
 336                 status = macb_mdio_read(macb, MII_BMSR);
 337                 if (status & BMSR_ANEGCOMPLETE)
 338                         break;
 339                 udelay(100);
 340         }
 341
 342         if (status & BMSR_ANEGCOMPLETE)
 343                 printf("%s: Autonegotiation complete\n", netdev->name);
 344         else
 345                 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
 346                        netdev->name, status);
 347 }
 348
 349 #ifdef CONFIG_MACB_SEARCH_PHY
 350 static int macb_phy_find(struct macb_device *macb)
 351 {
 352         int i;
 353         u16 phy_id;
 354
 355         /* Search for PHY... */
 356         for (i = 0; i < 32; i++) {
 357                 macb->phy_addr = i;
 358                 phy_id = macb_mdio_read(macb, MII_PHYSID1);
 359                 if (phy_id != 0xffff) {
 360                         printf("%s: PHY present at %d\n", macb->netdev.name, i);
 361                         return 1;
 362                 }
 363         }
 364
 365         /* PHY isn't up to snuff */
 366         printf("%s: PHY not found\n", macb->netdev.name);
 367
 368         return 0;
 369 }
 370 #endif /* CONFIG_MACB_SEARCH_PHY */
 371
 372
 373 static int macb_phy_init(struct macb_device *macb)
 374 {
 375         struct eth_device *netdev = &macb->netdev;
 376 #ifdef CONFIG_PHYLIB
 377         struct phy_device *phydev;
 378 #endif
 379         u32 ncfgr;
 380         u16 phy_id, status, adv, lpa;
 381         int media, speed, duplex;
 382         int i;
 383
 384         arch_get_mdio_control(netdev->name);
 385 #ifdef CONFIG_MACB_SEARCH_PHY
 386         /* Auto-detect phy_addr */
 387         if (!macb_phy_find(macb)) {
 388                 return 0;
 389         }
 390 #endif /* CONFIG_MACB_SEARCH_PHY */
 391
 392         /* Check if the PHY is up to snuff... */
 393         phy_id = macb_mdio_read(macb, MII_PHYSID1);
 394         if (phy_id == 0xffff) {
 395                 printf("%s: No PHY present\n", netdev->name);
 396                 return 0;
 397         }
 398
 399 #ifdef CONFIG_PHYLIB
 400         phydev->bus = macb->bus;
 401         phydev->dev = netdev;
 402         phydev->addr = macb->phy_addr;
 403         phy_config(phydev);
 404 #endif
 405
 406         status = macb_mdio_read(macb, MII_BMSR);
 407         if (!(status & BMSR_LSTATUS)) {
 408                 /* Try to re-negotiate if we don't have link already. */
 409                 macb_phy_reset(macb);
 410
 411                 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
 412                         status = macb_mdio_read(macb, MII_BMSR);
 413                         if (status & BMSR_LSTATUS)
 414                                 break;
 415                         udelay(100);
 416                 }
 417         }
 418
 419         if (!(status & BMSR_LSTATUS)) {
 420                 printf("%s: link down (status: 0x%04x)\n",
 421                        netdev->name, status);
 422                 return 0;
 423         }
 424
 425         /* First check for GMAC */
 426         if (macb_is_gem(macb)) {
 427                 lpa = macb_mdio_read(macb, MII_STAT1000);
 428                 if (lpa & (1 << 11)) {
 429                         speed = 1000;
 430                         duplex = 1;
 431                 } else {
 432                        if (lpa & (1 << 10)) {
 433                                 speed = 1000;
 434                                 duplex = 1;
 435                         } else {
 436                                 speed = 0;
 437                         }
 438                 }
 439
 440                 if (speed == 1000) {
 441                         printf("%s: link up, %dMbps %s-duplex (lpa: 0x%04x)\n",
 442                                netdev->name,
 443                                speed,
 444                                duplex ? "full" : "half",
 445                                lpa);
 446
 447                         ncfgr = macb_readl(macb, NCFGR);
 448                         ncfgr &= ~(GEM_BIT(GBE) | MACB_BIT(SPD) | MACB_BIT(FD));
 449                         if (speed)
 450                                 ncfgr |= GEM_BIT(GBE);
 451                         if (duplex)
 452                                 ncfgr |= MACB_BIT(FD);
 453                         macb_writel(macb, NCFGR, ncfgr);
 454
 455                         return 1;
 456                 }
 457         }
 458
 459         /* fall back for EMAC checking */
 460         adv = macb_mdio_read(macb, MII_ADVERTISE);
 461         lpa = macb_mdio_read(macb, MII_LPA);
 462         media = mii_nway_result(lpa & adv);
 463         speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
 464                  ? 1 : 0);
 465         duplex = (media & ADVERTISE_FULL) ? 1 : 0;
 466         printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
 467                netdev->name,
 468                speed ? "100" : "10",
 469                duplex ? "full" : "half",
 470                lpa);
 471
 472         ncfgr = macb_readl(macb, NCFGR);
 473         ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
 474         if (speed)
 475                 ncfgr |= MACB_BIT(SPD);
 476         if (duplex)
 477                 ncfgr |= MACB_BIT(FD);
 478         macb_writel(macb, NCFGR, ncfgr);
 479
 480         return 1;
 481 }
 482
 483 static int macb_init(struct eth_device *netdev, bd_t *bd)
 484 {
 485         struct macb_device *macb = to_macb(netdev);
 486         unsigned long paddr;
 487         int i;
 488
 489         /*
 490          * macb_halt should have been called at some point before now,
 491          * so we'll assume the controller is idle.
 492          */
 493
 494         /* initialize DMA descriptors */
 495         paddr = macb->rx_buffer_dma;
 496         for (i = 0; i < CONFIG_SYS_MACB_RX_RING_SIZE; i++) {
 497                 if (i == (CONFIG_SYS_MACB_RX_RING_SIZE - 1))
 498                         paddr |= RXADDR_WRAP;
 499                 macb->rx_ring[i].addr = paddr;
 500                 macb->rx_ring[i].ctrl = 0;
 501                 paddr += 128;
 502         }
 503         for (i = 0; i < CONFIG_SYS_MACB_TX_RING_SIZE; i++) {
 504                 macb->tx_ring[i].addr = 0;
 505                 if (i == (CONFIG_SYS_MACB_TX_RING_SIZE - 1))
 506                         macb->tx_ring[i].ctrl = TXBUF_USED | TXBUF_WRAP;
 507                 else
 508                         macb->tx_ring[i].ctrl = TXBUF_USED;
 509         }
 510         macb->rx_tail = macb->tx_head = macb->tx_tail = 0;
 511
 512         macb_writel(macb, RBQP, macb->rx_ring_dma);
 513         macb_writel(macb, TBQP, macb->tx_ring_dma);
 514
 515         if (macb_is_gem(macb)) {
 516 #ifdef CONFIG_RGMII
 517                 gem_writel(macb, UR, GEM_BIT(RGMII));
 518 #else
 519                 gem_writel(macb, UR, 0);
 520 #endif
 521         } else {
 522         /* choose RMII or MII mode. This depends on the board */
 523 #ifdef CONFIG_RMII
 524 #ifdef CONFIG_AT91FAMILY
 525         macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN));
 526 #else
 527         macb_writel(macb, USRIO, 0);
 528 #endif
 529 #else
 530 #ifdef CONFIG_AT91FAMILY
 531         macb_writel(macb, USRIO, MACB_BIT(CLKEN));
 532 #else
 533         macb_writel(macb, USRIO, MACB_BIT(MII));
 534 #endif
 535 #endif /* CONFIG_RMII */
 536         }
 537
 538         if (!macb_phy_init(macb))
 539                 return -1;
 540
 541         /* Enable TX and RX */
 542         macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE));
 543
 544         return 0;
 545 }
 546
 547 static void macb_halt(struct eth_device *netdev)
 548 {
 549         struct macb_device *macb = to_macb(netdev);
 550         u32 ncr, tsr;
 551
 552         /* Halt the controller and wait for any ongoing transmission to end. */
 553         ncr = macb_readl(macb, NCR);
 554         ncr |= MACB_BIT(THALT);
 555         macb_writel(macb, NCR, ncr);
 556
 557         do {
 558                 tsr = macb_readl(macb, TSR);
 559         } while (tsr & MACB_BIT(TGO));
 560
 561         /* Disable TX and RX, and clear statistics */
 562         macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
 563 }
 564
 565 static int macb_write_hwaddr(struct eth_device *dev)
 566 {
 567         struct macb_device *macb = to_macb(dev);
 568         u32 hwaddr_bottom;
 569         u16 hwaddr_top;
 570
 571         /* set hardware address */
 572         hwaddr_bottom = dev->enetaddr[0] | dev->enetaddr[1] << 8 |
 573                         dev->enetaddr[2] << 16 | dev->enetaddr[3] << 24;
 574         macb_writel(macb, SA1B, hwaddr_bottom);
 575         hwaddr_top = dev->enetaddr[4] | dev->enetaddr[5] << 8;
 576         macb_writel(macb, SA1T, hwaddr_top);
 577         return 0;
 578 }
 579
 580 static u32 macb_mdc_clk_div(int id, struct macb_device *macb)
 581 {
 582         u32 config;
 583         unsigned long macb_hz = get_macb_pclk_rate(id);
 584
 585         if (macb_hz < 20000000)
 586                 config = MACB_BF(CLK, MACB_CLK_DIV8);
 587         else if (macb_hz < 40000000)
 588                 config = MACB_BF(CLK, MACB_CLK_DIV16);
 589         else if (macb_hz < 80000000)
 590                 config = MACB_BF(CLK, MACB_CLK_DIV32);
 591         else
 592                 config = MACB_BF(CLK, MACB_CLK_DIV64);
 593
 594         return config;
 595 }
 596
 597 static u32 gem_mdc_clk_div(int id, struct macb_device *macb)
 598 {
 599         u32 config;
 600         unsigned long macb_hz = get_macb_pclk_rate(id);
 601
 602         if (macb_hz < 20000000)
 603                 config = GEM_BF(CLK, GEM_CLK_DIV8);
 604         else if (macb_hz < 40000000)
 605                 config = GEM_BF(CLK, GEM_CLK_DIV16);
 606         else if (macb_hz < 80000000)
 607                 config = GEM_BF(CLK, GEM_CLK_DIV32);
 608         else if (macb_hz < 120000000)
 609                 config = GEM_BF(CLK, GEM_CLK_DIV48);
 610         else if (macb_hz < 160000000)
 611                 config = GEM_BF(CLK, GEM_CLK_DIV64);
 612         else
 613                 config = GEM_BF(CLK, GEM_CLK_DIV96);
 614
 615         return config;
 616 }
 617
 618 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
 619 {
 620         struct macb_device *macb;
 621         struct eth_device *netdev;
 622         u32 ncfgr;
 623
 624         macb = malloc(sizeof(struct macb_device));
 625         if (!macb) {
 626                 printf("Error: Failed to allocate memory for MACB%d\n", id);
 627                 return -1;
 628         }
 629         memset(macb, 0, sizeof(struct macb_device));
 630
 631         netdev = &macb->netdev;
 632
 633         macb->rx_buffer = dma_alloc_coherent(CONFIG_SYS_MACB_RX_BUFFER_SIZE,
 634                                              &macb->rx_buffer_dma);
 635         macb->rx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_RX_RING_SIZE
 636                                            * sizeof(struct macb_dma_desc),
 637                                            &macb->rx_ring_dma);
 638         macb->tx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_TX_RING_SIZE
 639                                            * sizeof(struct macb_dma_desc),
 640                                            &macb->tx_ring_dma);
 641
 642         macb->regs = regs;
 643         macb->phy_addr = phy_addr;
 644
 645         if (macb_is_gem(macb))
 646                 sprintf(netdev->name, "gmac%d", id);
 647         else
 648                 sprintf(netdev->name, "macb%d", id);
 649
 650         netdev->init = macb_init;
 651         netdev->halt = macb_halt;
 652         netdev->send = macb_send;
 653         netdev->recv = macb_recv;
 654         netdev->write_hwaddr = macb_write_hwaddr;
 655
 656         /*
 657          * Do some basic initialization so that we at least can talk
 658          * to the PHY
 659          */
 660         if (macb_is_gem(macb)) {
 661                 ncfgr = gem_mdc_clk_div(id, macb);
 662                 ncfgr |= GEM_BF(DBW, 1);
 663         } else {
 664                 ncfgr = macb_mdc_clk_div(id, macb);
 665         }
 666
 667         macb_writel(macb, NCFGR, ncfgr);
 668
 669         eth_register(netdev);
 670
 671 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
 672         miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write);
 673         macb->bus = miiphy_get_dev_by_name(netdev->name);
 674 #endif
 675         return 0;
 676 }
 677
 678 #endif