drivers/net/ibm_emac/ibm_emac_core.c

   1 /*
   2  * ibm_emac_core.c
   3  *
   4  * Ethernet driver for the built in ethernet on the IBM 4xx PowerPC
   5  * processors.
   6  *
   7  * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
   8  *
   9  * Based on original work by
  10  *
  11  *      Armin Kuster <akuster@mvista.com>
  12  *      Johnnie Peters <jpeters@mvista.com>
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  * TODO
  19  *       - Check for races in the "remove" code path
  20  *       - Add some Power Management to the MAC and the PHY
  21  *       - Audit remaining of non-rewritten code (--BenH)
  22  *       - Cleanup message display using msglevel mecanism
  23  *       - Address all errata
  24  *       - Audit all register update paths to ensure they
  25  *         are being written post soft reset if required.
  26  */
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/sched.h>
  30 #include <linux/string.h>
  31 #include <linux/timer.h>
  32 #include <linux/ptrace.h>
  33 #include <linux/errno.h>
  34 #include <linux/ioport.h>
  35 #include <linux/slab.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/delay.h>
  38 #include <linux/init.h>
  39 #include <linux/types.h>
  40 #include <linux/dma-mapping.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/mii.h>
  43 #include <linux/bitops.h>
  44
  45 #include <asm/processor.h>
  46 #include <asm/io.h>
  47 #include <asm/dma.h>
  48 #include <asm/irq.h>
  49 #include <asm/uaccess.h>
  50 #include <asm/ocp.h>
  51
  52 #include <linux/netdevice.h>
  53 #include <linux/etherdevice.h>
  54 #include <linux/skbuff.h>
  55 #include <linux/crc32.h>
  56
  57 #include "ibm_emac_core.h"
  58
  59 //#define MDIO_DEBUG(fmt) printk fmt
  60 #define MDIO_DEBUG(fmt)
  61
  62 //#define LINK_DEBUG(fmt) printk fmt
  63 #define LINK_DEBUG(fmt)
  64
  65 //#define PKT_DEBUG(fmt) printk fmt
  66 #define PKT_DEBUG(fmt)
  67
  68 #define DRV_NAME        "emac"
  69 #define DRV_VERSION     "2.0"
  70 #define DRV_AUTHOR      "Benjamin Herrenschmidt <benh@kernel.crashing.org>"
  71 #define DRV_DESC        "IBM EMAC Ethernet driver"
  72
  73 /*
  74  * When mdio_idx >= 0, contains a list of emac ocp_devs
  75  * that have had their initialization deferred until the
  76  * common MDIO controller has been initialized.
  77  */
  78 LIST_HEAD(emac_init_list);
  79
  80 MODULE_AUTHOR(DRV_AUTHOR);
  81 MODULE_DESCRIPTION(DRV_DESC);
  82 MODULE_LICENSE("GPL");
  83
  84 static int skb_res = SKB_RES;
  85 module_param(skb_res, int, 0444);
  86 MODULE_PARM_DESC(skb_res, "Amount of data to reserve on skb buffs\n"
  87                  "The 405 handles a misaligned IP header fine but\n"
  88                  "this can help if you are routing to a tunnel or a\n"
  89                  "device that needs aligned data. 0..2");
  90
  91 #define RGMII_PRIV(ocpdev) ((struct ibm_ocp_rgmii*)ocp_get_drvdata(ocpdev))
  92
  93 static unsigned int rgmii_enable[] = {
  94         RGMII_RTBI,
  95         RGMII_RGMII,
  96         RGMII_TBI,
  97         RGMII_GMII
  98 };
  99
 100 static unsigned int rgmii_speed_mask[] = {
 101         RGMII_MII2_SPDMASK,
 102         RGMII_MII3_SPDMASK
 103 };
 104
 105 static unsigned int rgmii_speed100[] = {
 106         RGMII_MII2_100MB,
 107         RGMII_MII3_100MB
 108 };
 109
 110 static unsigned int rgmii_speed1000[] = {
 111         RGMII_MII2_1000MB,
 112         RGMII_MII3_1000MB
 113 };
 114
 115 #define ZMII_PRIV(ocpdev) ((struct ibm_ocp_zmii*)ocp_get_drvdata(ocpdev))
 116
 117 static unsigned int zmii_enable[][4] = {
 118         {ZMII_SMII0, ZMII_RMII0, ZMII_MII0,
 119          ~(ZMII_MDI1 | ZMII_MDI2 | ZMII_MDI3)},
 120         {ZMII_SMII1, ZMII_RMII1, ZMII_MII1,
 121          ~(ZMII_MDI0 | ZMII_MDI2 | ZMII_MDI3)},
 122         {ZMII_SMII2, ZMII_RMII2, ZMII_MII2,
 123          ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI3)},
 124         {ZMII_SMII3, ZMII_RMII3, ZMII_MII3, ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI2)}
 125 };
 126
 127 static unsigned int mdi_enable[] = {
 128         ZMII_MDI0,
 129         ZMII_MDI1,
 130         ZMII_MDI2,
 131         ZMII_MDI3
 132 };
 133
 134 static unsigned int zmii_speed = 0x0;
 135 static unsigned int zmii_speed100[] = {
 136         ZMII_MII0_100MB,
 137         ZMII_MII1_100MB,
 138         ZMII_MII2_100MB,
 139         ZMII_MII3_100MB
 140 };
 141
 142 /* Since multiple EMACs share MDIO lines in various ways, we need
 143  * to avoid re-using the same PHY ID in cases where the arch didn't
 144  * setup precise phy_map entries
 145  */
 146 static u32 busy_phy_map = 0;
 147
 148 /* If EMACs share a common MDIO device, this points to it */
 149 static struct net_device *mdio_ndev = NULL;
 150
 151 struct emac_def_dev {
 152         struct list_head link;
 153         struct ocp_device *ocpdev;
 154         struct ibm_ocp_mal *mal;
 155 };
 156
 157 static struct net_device_stats *emac_stats(struct net_device *dev)
 158 {
 159         struct ocp_enet_private *fep = dev->priv;
 160         return &fep->stats;
 161 };
 162
 163 static int
 164 emac_init_rgmii(struct ocp_device *rgmii_dev, int input, int phy_mode)
 165 {
 166         struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(rgmii_dev);
 167         const char *mode_name[] = { "RTBI", "RGMII", "TBI", "GMII" };
 168         int mode = -1;
 169
 170         if (!rgmii) {
 171                 rgmii = kmalloc(sizeof(struct ibm_ocp_rgmii), GFP_KERNEL);
 172
 173                 if (rgmii == NULL) {
 174                         printk(KERN_ERR
 175                                "rgmii%d: Out of memory allocating RGMII structure!\n",
 176                                rgmii_dev->def->index);
 177                         return -ENOMEM;
 178                 }
 179
 180                 memset(rgmii, 0, sizeof(*rgmii));
 181
 182                 rgmii->base =
 183                     (struct rgmii_regs *)ioremap(rgmii_dev->def->paddr,
 184                                                  sizeof(*rgmii->base));
 185                 if (rgmii->base == NULL) {
 186                         printk(KERN_ERR
 187                                "rgmii%d: Cannot ioremap bridge registers!\n",
 188                                rgmii_dev->def->index);
 189
 190                         kfree(rgmii);
 191                         return -ENOMEM;
 192                 }
 193                 ocp_set_drvdata(rgmii_dev, rgmii);
 194         }
 195
 196         if (phy_mode) {
 197                 switch (phy_mode) {
 198                 case PHY_MODE_GMII:
 199                         mode = GMII;
 200                         break;
 201                 case PHY_MODE_TBI:
 202                         mode = TBI;
 203                         break;
 204                 case PHY_MODE_RTBI:
 205                         mode = RTBI;
 206                         break;
 207                 case PHY_MODE_RGMII:
 208                 default:
 209                         mode = RGMII;
 210                 }
 211                 rgmii->base->fer &= ~RGMII_FER_MASK(input);
 212                 rgmii->base->fer |= rgmii_enable[mode] << (4 * input);
 213         } else {
 214                 switch ((rgmii->base->fer & RGMII_FER_MASK(input)) >> (4 *
 215                                                                        input)) {
 216                 case RGMII_RTBI:
 217                         mode = RTBI;
 218                         break;
 219                 case RGMII_RGMII:
 220                         mode = RGMII;
 221                         break;
 222                 case RGMII_TBI:
 223                         mode = TBI;
 224                         break;
 225                 case RGMII_GMII:
 226                         mode = GMII;
 227                 }
 228         }
 229
 230         /* Set mode to RGMII if nothing valid is detected */
 231         if (mode < 0)
 232                 mode = RGMII;
 233
 234         printk(KERN_NOTICE "rgmii%d: input %d in %s mode\n",
 235                rgmii_dev->def->index, input, mode_name[mode]);
 236
 237         rgmii->mode[input] = mode;
 238         rgmii->users++;
 239
 240         return 0;
 241 }
 242
 243 static void
 244 emac_rgmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
 245 {
 246         struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
 247         unsigned int rgmii_speed;
 248
 249         rgmii_speed = in_be32(&rgmii->base->ssr);
 250
 251         rgmii_speed &= ~rgmii_speed_mask[input];
 252
 253         if (speed == 1000)
 254                 rgmii_speed |= rgmii_speed1000[input];
 255         else if (speed == 100)
 256                 rgmii_speed |= rgmii_speed100[input];
 257
 258         out_be32(&rgmii->base->ssr, rgmii_speed);
 259 }
 260
 261 static void emac_close_rgmii(struct ocp_device *ocpdev)
 262 {
 263         struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
 264         BUG_ON(!rgmii || rgmii->users == 0);
 265
 266         if (!--rgmii->users) {
 267                 ocp_set_drvdata(ocpdev, NULL);
 268                 iounmap((void *)rgmii->base);
 269                 kfree(rgmii);
 270         }
 271 }
 272
 273 static int emac_init_zmii(struct ocp_device *zmii_dev, int input, int phy_mode)
 274 {
 275         struct ibm_ocp_zmii *zmii = ZMII_PRIV(zmii_dev);
 276         const char *mode_name[] = { "SMII", "RMII", "MII" };
 277         int mode = -1;
 278
 279         if (!zmii) {
 280                 zmii = kmalloc(sizeof(struct ibm_ocp_zmii), GFP_KERNEL);
 281                 if (zmii == NULL) {
 282                         printk(KERN_ERR
 283                                "zmii%d: Out of memory allocating ZMII structure!\n",
 284                                zmii_dev->def->index);
 285                         return -ENOMEM;
 286                 }
 287                 memset(zmii, 0, sizeof(*zmii));
 288
 289                 zmii->base =
 290                     (struct zmii_regs *)ioremap(zmii_dev->def->paddr,
 291                                                 sizeof(*zmii->base));
 292                 if (zmii->base == NULL) {
 293                         printk(KERN_ERR
 294                                "zmii%d: Cannot ioremap bridge registers!\n",
 295                                zmii_dev->def->index);
 296
 297                         kfree(zmii);
 298                         return -ENOMEM;
 299                 }
 300                 ocp_set_drvdata(zmii_dev, zmii);
 301         }
 302
 303         if (phy_mode) {
 304                 switch (phy_mode) {
 305                 case PHY_MODE_MII:
 306                         mode = MII;
 307                         break;
 308                 case PHY_MODE_RMII:
 309                         mode = RMII;
 310                         break;
 311                 case PHY_MODE_SMII:
 312                 default:
 313                         mode = SMII;
 314                 }
 315                 zmii->base->fer &= ~ZMII_FER_MASK(input);
 316                 zmii->base->fer |= zmii_enable[input][mode];
 317         } else {
 318                 switch ((zmii->base->fer & ZMII_FER_MASK(input)) << (4 * input)) {
 319                 case ZMII_MII0:
 320                         mode = MII;
 321                         break;
 322                 case ZMII_RMII0:
 323                         mode = RMII;
 324                         break;
 325                 case ZMII_SMII0:
 326                         mode = SMII;
 327                 }
 328         }
 329
 330         /* Set mode to SMII if nothing valid is detected */
 331         if (mode < 0)
 332                 mode = SMII;
 333
 334         printk(KERN_NOTICE "zmii%d: input %d in %s mode\n",
 335                zmii_dev->def->index, input, mode_name[mode]);
 336
 337         zmii->mode[input] = mode;
 338         zmii->users++;
 339
 340         return 0;
 341 }
 342
 343 static void emac_enable_zmii_port(struct ocp_device *ocpdev, int input)
 344 {
 345         u32 mask;
 346         struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
 347
 348         mask = in_be32(&zmii->base->fer);
 349         mask &= zmii_enable[input][MDI];        /* turn all non enabled MDI's off */
 350         mask |= zmii_enable[input][zmii->mode[input]] | mdi_enable[input];
 351         out_be32(&zmii->base->fer, mask);
 352 }
 353
 354 static void
 355 emac_zmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
 356 {
 357         struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
 358
 359         if (speed == 100)
 360                 zmii_speed |= zmii_speed100[input];
 361         else
 362                 zmii_speed &= ~zmii_speed100[input];
 363
 364         out_be32(&zmii->base->ssr, zmii_speed);
 365 }
 366
 367 static void emac_close_zmii(struct ocp_device *ocpdev)
 368 {
 369         struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
 370         BUG_ON(!zmii || zmii->users == 0);
 371
 372         if (!--zmii->users) {
 373                 ocp_set_drvdata(ocpdev, NULL);
 374                 iounmap((void *)zmii->base);
 375                 kfree(zmii);
 376         }
 377 }
 378
 379 int emac_phy_read(struct net_device *dev, int mii_id, int reg)
 380 {
 381         int count;
 382         uint32_t stacr;
 383         struct ocp_enet_private *fep = dev->priv;
 384         emac_t *emacp = fep->emacp;
 385
 386         MDIO_DEBUG(("%s: phy_read, id: 0x%x, reg: 0x%x\n", dev->name, mii_id,
 387                     reg));
 388
 389         /* Enable proper ZMII port */
 390         if (fep->zmii_dev)
 391                 emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
 392
 393         /* Use the EMAC that has the MDIO port */
 394         if (fep->mdio_dev) {
 395                 dev = fep->mdio_dev;
 396                 fep = dev->priv;
 397                 emacp = fep->emacp;
 398         }
 399
 400         count = 0;
 401         while ((((stacr = in_be32(&emacp->em0stacr)) & EMAC_STACR_OC) == 0)
 402                                         && (count++ < MDIO_DELAY))
 403                 udelay(1);
 404         MDIO_DEBUG((" (count was %d)\n", count));
 405
 406         if ((stacr & EMAC_STACR_OC) == 0) {
 407                 printk(KERN_WARNING "%s: PHY read timeout #1!\n", dev->name);
 408                 return -1;
 409         }
 410
 411         /* Clear the speed bits and make a read request to the PHY */
 412         stacr = ((EMAC_STACR_READ | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
 413         stacr |= ((mii_id & 0x1F) << 5);
 414
 415         out_be32(&emacp->em0stacr, stacr);
 416
 417         count = 0;
 418         while ((((stacr = in_be32(&emacp->em0stacr)) & EMAC_STACR_OC) == 0)
 419                                         && (count++ < MDIO_DELAY))
 420                 udelay(1);
 421         MDIO_DEBUG((" (count was %d)\n", count));
 422
 423         if ((stacr & EMAC_STACR_OC) == 0) {
 424                 printk(KERN_WARNING "%s: PHY read timeout #2!\n", dev->name);
 425                 return -1;
 426         }
 427
 428         /* Check for a read error */
 429         if (stacr & EMAC_STACR_PHYE) {
 430                 MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
 431                 return -1;
 432         }
 433
 434         MDIO_DEBUG((" -> 0x%x\n", stacr >> 16));
 435
 436         return (stacr >> 16);
 437 }
 438
 439 void emac_phy_write(struct net_device *dev, int mii_id, int reg, int data)
 440 {
 441         int count;
 442         uint32_t stacr;
 443         struct ocp_enet_private *fep = dev->priv;
 444         emac_t *emacp = fep->emacp;
 445
 446         MDIO_DEBUG(("%s phy_write, id: 0x%x, reg: 0x%x, data: 0x%x\n",
 447                     dev->name, mii_id, reg, data));
 448
 449         /* Enable proper ZMII port */
 450         if (fep->zmii_dev)
 451                 emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
 452
 453         /* Use the EMAC that has the MDIO port */
 454         if (fep->mdio_dev) {
 455                 dev = fep->mdio_dev;
 456                 fep = dev->priv;
 457                 emacp = fep->emacp;
 458         }
 459
 460         count = 0;
 461         while ((((stacr = in_be32(&emacp->em0stacr)) & EMAC_STACR_OC) == 0)
 462                                         && (count++ < MDIO_DELAY))
 463                 udelay(1);
 464         MDIO_DEBUG((" (count was %d)\n", count));
 465
 466         if ((stacr & EMAC_STACR_OC) == 0) {
 467                 printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
 468                 return;
 469         }
 470
 471         /* Clear the speed bits and make a read request to the PHY */
 472
 473         stacr = ((EMAC_STACR_WRITE | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
 474         stacr |= ((mii_id & 0x1f) << 5) | ((data & 0xffff) << 16);
 475
 476         out_be32(&emacp->em0stacr, stacr);
 477
 478         while (((stacr = in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0)
 479                                         && (count++ < 5000))
 480                 udelay(1);
 481         MDIO_DEBUG((" (count was %d)\n", count));
 482
 483         if ((stacr & EMAC_STACR_OC) == 0)
 484                 printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
 485
 486         /* Check for a write error */
 487         if ((stacr & EMAC_STACR_PHYE) != 0) {
 488                 MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
 489         }
 490 }
 491
 492 static void emac_txeob_dev(void *param, u32 chanmask)
 493 {
 494         struct net_device *dev = param;
 495         struct ocp_enet_private *fep = dev->priv;
 496         unsigned long flags;
 497
 498         spin_lock_irqsave(&fep->lock, flags);
 499
 500         PKT_DEBUG(("emac_txeob_dev() entry, tx_cnt: %d\n", fep->tx_cnt));
 501
 502         while (fep->tx_cnt &&
 503                !(fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_READY)) {
 504
 505                 if (fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_LAST) {
 506                         /* Tell the system the transmit completed. */
 507                         dma_unmap_single(&fep->ocpdev->dev,
 508                                          fep->tx_desc[fep->ack_slot].data_ptr,
 509                                          fep->tx_desc[fep->ack_slot].data_len,
 510                                          DMA_TO_DEVICE);
 511                         dev_kfree_skb_irq(fep->tx_skb[fep->ack_slot]);
 512
 513                         if (fep->tx_desc[fep->ack_slot].ctrl &
 514                             (EMAC_TX_ST_EC | EMAC_TX_ST_MC | EMAC_TX_ST_SC))
 515                                 fep->stats.collisions++;
 516                 }
 517
 518                 fep->tx_skb[fep->ack_slot] = (struct sk_buff *)NULL;
 519                 if (++fep->ack_slot == NUM_TX_BUFF)
 520                         fep->ack_slot = 0;
 521
 522                 fep->tx_cnt--;
 523         }
 524         if (fep->tx_cnt < NUM_TX_BUFF)
 525                 netif_wake_queue(dev);
 526
 527         PKT_DEBUG(("emac_txeob_dev() exit, tx_cnt: %d\n", fep->tx_cnt));
 528
 529         spin_unlock_irqrestore(&fep->lock, flags);
 530 }
 531
 532 /*
 533   Fill/Re-fill the rx chain with valid ctrl/ptrs.
 534   This function will fill from rx_slot up to the parm end.
 535   So to completely fill the chain pre-set rx_slot to 0 and
 536   pass in an end of 0.
 537  */
 538 static void emac_rx_fill(struct net_device *dev, int end)
 539 {
 540         int i;
 541         struct ocp_enet_private *fep = dev->priv;
 542
 543         i = fep->rx_slot;
 544         do {
 545                 /* We don't want the 16 bytes skb_reserve done by dev_alloc_skb,
 546                  * it breaks our cache line alignement. However, we still allocate
 547                  * +16 so that we end up allocating the exact same size as
 548                  * dev_alloc_skb() would do.
 549                  * Also, because of the skb_res, the max DMA size we give to EMAC
 550                  * is slighly wrong, causing it to potentially DMA 2 more bytes
 551                  * from a broken/oversized packet. These 16 bytes will take care
 552                  * that we don't walk on somebody else toes with that.
 553                  */
 554                 fep->rx_skb[i] =
 555                     alloc_skb(fep->rx_buffer_size + 16, GFP_ATOMIC);
 556
 557                 if (fep->rx_skb[i] == NULL) {
 558                         /* Keep rx_slot here, the next time clean/fill is called
 559                          * we will try again before the MAL wraps back here
 560                          * If the MAL tries to use this descriptor with
 561                          * the EMPTY bit off it will cause the
 562                          * rxde interrupt.  That is where we will
 563                          * try again to allocate an sk_buff.
 564                          */
 565                         break;
 566
 567                 }
 568
 569                 if (skb_res)
 570                         skb_reserve(fep->rx_skb[i], skb_res);
 571
 572                 /* We must NOT dma_map_single the cache line right after the
 573                  * buffer, so we must crop our sync size to account for the
 574                  * reserved space
 575                  */
 576                 fep->rx_desc[i].data_ptr =
 577                     (unsigned char *)dma_map_single(&fep->ocpdev->dev,
 578                                                     (void *)fep->rx_skb[i]->
 579                                                     data,
 580                                                     fep->rx_buffer_size -
 581                                                     skb_res, DMA_FROM_DEVICE);
 582
 583                 /*
 584                  * Some 4xx implementations use the previously
 585                  * reserved bits in data_len to encode the MS
 586                  * 4-bits of a 36-bit physical address (ERPN)
 587                  * This must be initialized.
 588                  */
 589                 fep->rx_desc[i].data_len = 0;
 590                 fep->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR |
 591                     (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
 592
 593         } while ((i = (i + 1) % NUM_RX_BUFF) != end);
 594
 595         fep->rx_slot = i;
 596 }
 597
 598 static void
 599 emac_rx_csum(struct net_device *dev, unsigned short ctrl, struct sk_buff *skb)
 600 {
 601         struct ocp_enet_private *fep = dev->priv;
 602
 603         /* Exit if interface has no TAH engine */
 604         if (!fep->tah_dev) {
 605                 skb->ip_summed = CHECKSUM_NONE;
 606                 return;
 607         }
 608
 609         /* Check for TCP/UDP/IP csum error */
 610         if (ctrl & EMAC_CSUM_VER_ERROR) {
 611                 /* Let the stack verify checksum errors */
 612                 skb->ip_summed = CHECKSUM_NONE;
 613 /*              adapter->hw_csum_err++; */
 614         } else {
 615                 /* Csum is good */
 616                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 617 /*              adapter->hw_csum_good++; */
 618         }
 619 }
 620
 621 static int emac_rx_clean(struct net_device *dev)
 622 {
 623         int i, b, bnum = 0, buf[6];
 624         int error, frame_length;
 625         struct ocp_enet_private *fep = dev->priv;
 626         unsigned short ctrl;
 627
 628         i = fep->rx_slot;
 629
 630         PKT_DEBUG(("emac_rx_clean() entry, rx_slot: %d\n", fep->rx_slot));
 631
 632         do {
 633                 if (fep->rx_skb[i] == NULL)
 634                         continue;       /*we have already handled the packet but haved failed to alloc */
 635                 /*
 636                    since rx_desc is in uncached mem we don't keep reading it directly
 637                    we pull out a local copy of ctrl and do the checks on the copy.
 638                  */
 639                 ctrl = fep->rx_desc[i].ctrl;
 640                 if (ctrl & MAL_RX_CTRL_EMPTY)
 641                         break;  /*we don't have any more ready packets */
 642
 643                 if (EMAC_IS_BAD_RX_PACKET(ctrl)) {
 644                         fep->stats.rx_errors++;
 645                         fep->stats.rx_dropped++;
 646
 647                         if (ctrl & EMAC_RX_ST_OE)
 648                                 fep->stats.rx_fifo_errors++;
 649                         if (ctrl & EMAC_RX_ST_AE)
 650                                 fep->stats.rx_frame_errors++;
 651                         if (ctrl & EMAC_RX_ST_BFCS)
 652                                 fep->stats.rx_crc_errors++;
 653                         if (ctrl & (EMAC_RX_ST_RP | EMAC_RX_ST_PTL |
 654                                     EMAC_RX_ST_ORE | EMAC_RX_ST_IRE))
 655                                 fep->stats.rx_length_errors++;
 656                 } else {
 657                         if ((ctrl & (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) ==
 658                             (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) {
 659                                 /* Single descriptor packet */
 660                                 emac_rx_csum(dev, ctrl, fep->rx_skb[i]);
 661                                 /* Send the skb up the chain. */
 662                                 frame_length = fep->rx_desc[i].data_len - 4;
 663                                 skb_put(fep->rx_skb[i], frame_length);
 664                                 fep->rx_skb[i]->dev = dev;
 665                                 fep->rx_skb[i]->protocol =
 666                                     eth_type_trans(fep->rx_skb[i], dev);
 667                                 error = netif_rx(fep->rx_skb[i]);
 668
 669                                 if ((error == NET_RX_DROP) ||
 670                                     (error == NET_RX_BAD)) {
 671                                         fep->stats.rx_dropped++;
 672                                 } else {
 673                                         fep->stats.rx_packets++;
 674                                         fep->stats.rx_bytes += frame_length;
 675                                 }
 676                                 fep->rx_skb[i] = NULL;
 677                         } else {
 678                                 /* Multiple descriptor packet */
 679                                 if (ctrl & MAL_RX_CTRL_FIRST) {
 680                                         if (fep->rx_desc[(i + 1) % NUM_RX_BUFF].
 681                                             ctrl & MAL_RX_CTRL_EMPTY)
 682                                                 break;
 683                                         bnum = 0;
 684                                         buf[bnum] = i;
 685                                         ++bnum;
 686                                         continue;
 687                                 }
 688                                 if (((ctrl & MAL_RX_CTRL_FIRST) !=
 689                                      MAL_RX_CTRL_FIRST) &&
 690                                     ((ctrl & MAL_RX_CTRL_LAST) !=
 691                                      MAL_RX_CTRL_LAST)) {
 692                                         if (fep->rx_desc[(i + 1) %
 693                                                          NUM_RX_BUFF].ctrl &
 694                                             MAL_RX_CTRL_EMPTY) {
 695                                                 i = buf[0];
 696                                                 break;
 697                                         }
 698                                         buf[bnum] = i;
 699                                         ++bnum;
 700                                         continue;
 701                                 }
 702                                 if (ctrl & MAL_RX_CTRL_LAST) {
 703                                         buf[bnum] = i;
 704                                         ++bnum;
 705                                         skb_put(fep->rx_skb[buf[0]],
 706                                                 fep->rx_desc[buf[0]].data_len);
 707                                         for (b = 1; b < bnum; b++) {
 708                                                 /*
 709                                                  * MAL is braindead, we need
 710                                                  * to copy the remainder
 711                                                  * of the packet from the
 712                                                  * latter descriptor buffers
 713                                                  * to the first skb. Then
 714                                                  * dispose of the source
 715                                                  * skbs.
 716                                                  *
 717                                                  * Once the stack is fixed
 718                                                  * to handle frags on most
 719                                                  * protocols we can generate
 720                                                  * a fragmented skb with
 721                                                  * no copies.
 722                                                  */
 723                                                 memcpy(fep->rx_skb[buf[0]]->
 724                                                        data +
 725                                                        fep->rx_skb[buf[0]]->len,
 726                                                        fep->rx_skb[buf[b]]->
 727                                                        data,
 728                                                        fep->rx_desc[buf[b]].
 729                                                        data_len);
 730                                                 skb_put(fep->rx_skb[buf[0]],
 731                                                         fep->rx_desc[buf[b]].
 732                                                         data_len);
 733                                                 dma_unmap_single(&fep->ocpdev->
 734                                                                  dev,
 735                                                                  fep->
 736                                                                  rx_desc[buf
 737                                                                          [b]].
 738                                                                  data_ptr,
 739                                                                  fep->
 740                                                                  rx_desc[buf
 741                                                                          [b]].
 742                                                                  data_len,
 743                                                                  DMA_FROM_DEVICE);
 744                                                 dev_kfree_skb(fep->
 745                                                               rx_skb[buf[b]]);
 746                                         }
 747                                         emac_rx_csum(dev, ctrl,
 748                                                      fep->rx_skb[buf[0]]);
 749
 750                                         fep->rx_skb[buf[0]]->dev = dev;
 751                                         fep->rx_skb[buf[0]]->protocol =
 752                                             eth_type_trans(fep->rx_skb[buf[0]],
 753                                                            dev);
 754                                         error = netif_rx(fep->rx_skb[buf[0]]);
 755
 756                                         if ((error == NET_RX_DROP)
 757                                             || (error == NET_RX_BAD)) {
 758                                                 fep->stats.rx_dropped++;
 759                                         } else {
 760                                                 fep->stats.rx_packets++;
 761                                                 fep->stats.rx_bytes +=
 762                                                     fep->rx_skb[buf[0]]->len;
 763                                         }
 764                                         for (b = 0; b < bnum; b++)
 765                                                 fep->rx_skb[buf[b]] = NULL;
 766                                 }
 767                         }
 768                 }
 769         } while ((i = (i + 1) % NUM_RX_BUFF) != fep->rx_slot);
 770
 771         PKT_DEBUG(("emac_rx_clean() exit, rx_slot: %d\n", fep->rx_slot));
 772
 773         return i;
 774 }
 775
 776 static void emac_rxeob_dev(void *param, u32 chanmask)
 777 {
 778         struct net_device *dev = param;
 779         struct ocp_enet_private *fep = dev->priv;
 780         unsigned long flags;
 781         int n;
 782
 783         spin_lock_irqsave(&fep->lock, flags);
 784         if ((n = emac_rx_clean(dev)) != fep->rx_slot)
 785                 emac_rx_fill(dev, n);
 786         spin_unlock_irqrestore(&fep->lock, flags);
 787 }
 788
 789 /*
 790  * This interrupt should never occurr, we don't program
 791  * the MAL for contiunous mode.
 792  */
 793 static void emac_txde_dev(void *param, u32 chanmask)
 794 {
 795         struct net_device *dev = param;
 796         struct ocp_enet_private *fep = dev->priv;
 797
 798         printk(KERN_WARNING "%s: transmit descriptor error\n", dev->name);
 799
 800         emac_mac_dump(dev);
 801         emac_mal_dump(dev);
 802
 803         /* Reenable the transmit channel */
 804         mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
 805 }
 806
 807 /*
 808  * This interrupt should be very rare at best.  This occurs when
 809  * the hardware has a problem with the receive descriptors.  The manual
 810  * states that it occurs when the hardware cannot the receive descriptor
 811  * empty bit is not set.  The recovery mechanism will be to
 812  * traverse through the descriptors, handle any that are marked to be
 813  * handled and reinitialize each along the way.  At that point the driver
 814  * will be restarted.
 815  */
 816 static void emac_rxde_dev(void *param, u32 chanmask)
 817 {
 818         struct net_device *dev = param;
 819         struct ocp_enet_private *fep = dev->priv;
 820         unsigned long flags;
 821
 822         if (net_ratelimit()) {
 823                 printk(KERN_WARNING "%s: receive descriptor error\n",
 824                        fep->ndev->name);
 825
 826                 emac_mac_dump(dev);
 827                 emac_mal_dump(dev);
 828                 emac_desc_dump(dev);
 829         }
 830
 831         /* Disable RX channel */
 832         spin_lock_irqsave(&fep->lock, flags);
 833         mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
 834
 835         /* For now, charge the error against all emacs */
 836         fep->stats.rx_errors++;
 837
 838         /* so do we have any good packets still? */
 839         emac_rx_clean(dev);
 840
 841         /* When the interface is restarted it resets processing to the
 842          *  first descriptor in the table.
 843          */
 844
 845         fep->rx_slot = 0;
 846         emac_rx_fill(dev, 0);
 847
 848         set_mal_dcrn(fep->mal, DCRN_MALRXEOBISR, fep->commac.rx_chan_mask);
 849         set_mal_dcrn(fep->mal, DCRN_MALRXDEIR, fep->commac.rx_chan_mask);
 850
 851         /* Reenable the receive channels */
 852         mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
 853         spin_unlock_irqrestore(&fep->lock, flags);
 854 }
 855
 856 static irqreturn_t
 857 emac_mac_irq(int irq, void *dev_instance, struct pt_regs *regs)
 858 {
 859         struct net_device *dev = dev_instance;
 860         struct ocp_enet_private *fep = dev->priv;
 861         emac_t *emacp = fep->emacp;
 862         unsigned long tmp_em0isr;
 863
 864         /* EMAC interrupt */
 865         tmp_em0isr = in_be32(&emacp->em0isr);
 866         if (tmp_em0isr & (EMAC_ISR_TE0 | EMAC_ISR_TE1)) {
 867                 /* This error is a hard transmit error - could retransmit */
 868                 fep->stats.tx_errors++;
 869
 870                 /* Reenable the transmit channel */
 871                 mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
 872
 873         } else {
 874                 fep->stats.rx_errors++;
 875         }
 876
 877         if (tmp_em0isr & EMAC_ISR_RP)
 878                 fep->stats.rx_length_errors++;
 879         if (tmp_em0isr & EMAC_ISR_ALE)
 880                 fep->stats.rx_frame_errors++;
 881         if (tmp_em0isr & EMAC_ISR_BFCS)
 882                 fep->stats.rx_crc_errors++;
 883         if (tmp_em0isr & EMAC_ISR_PTLE)
 884                 fep->stats.rx_length_errors++;
 885         if (tmp_em0isr & EMAC_ISR_ORE)
 886                 fep->stats.rx_length_errors++;
 887         if (tmp_em0isr & EMAC_ISR_TE0)
 888                 fep->stats.tx_aborted_errors++;
 889
 890         emac_err_dump(dev, tmp_em0isr);
 891
 892         out_be32(&emacp->em0isr, tmp_em0isr);
 893
 894         return IRQ_HANDLED;
 895 }
 896
 897 static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
 898 {
 899         unsigned short ctrl;
 900         unsigned long flags;
 901         struct ocp_enet_private *fep = dev->priv;
 902         emac_t *emacp = fep->emacp;
 903         int len = skb->len;
 904         unsigned int offset = 0, size, f, tx_slot_first;
 905         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
 906
 907         spin_lock_irqsave(&fep->lock, flags);
 908
 909         len -= skb->data_len;
 910
 911         if ((fep->tx_cnt + nr_frags + len / DESC_BUF_SIZE + 1) > NUM_TX_BUFF) {
 912                 PKT_DEBUG(("emac_start_xmit() stopping queue\n"));
 913                 netif_stop_queue(dev);
 914                 spin_unlock_irqrestore(&fep->lock, flags);
 915                 restore_flags(flags);
 916                 return -EBUSY;
 917         }
 918
 919         tx_slot_first = fep->tx_slot;
 920
 921         while (len) {
 922                 size = min(len, DESC_BUF_SIZE);
 923
 924                 fep->tx_desc[fep->tx_slot].data_len = (short)size;
 925                 fep->tx_desc[fep->tx_slot].data_ptr =
 926                     (unsigned char *)dma_map_single(&fep->ocpdev->dev,
 927                                                     (void *)((unsigned int)skb->
 928                                                              data + offset),
 929                                                     size, DMA_TO_DEVICE);
 930
 931                 ctrl = EMAC_TX_CTRL_DFLT;
 932                 if (fep->tx_slot != tx_slot_first)
 933                         ctrl |= MAL_TX_CTRL_READY;
 934                 if ((NUM_TX_BUFF - 1) == fep->tx_slot)
 935                         ctrl |= MAL_TX_CTRL_WRAP;
 936                 if (!nr_frags && (len == size)) {
 937                         ctrl |= MAL_TX_CTRL_LAST;
 938                         fep->tx_skb[fep->tx_slot] = skb;
 939                 }
 940                 if (skb->ip_summed == CHECKSUM_HW)
 941                         ctrl |= EMAC_TX_CTRL_TAH_CSUM;
 942
 943                 fep->tx_desc[fep->tx_slot].ctrl = ctrl;
 944
 945                 len -= size;
 946                 offset += size;
 947
 948                 /* Bump tx count */
 949                 if (++fep->tx_cnt == NUM_TX_BUFF)
 950                         netif_stop_queue(dev);
 951
 952                 /* Next descriptor */
 953                 if (++fep->tx_slot == NUM_TX_BUFF)
 954                         fep->tx_slot = 0;
 955         }
 956
 957         for (f = 0; f < nr_frags; f++) {
 958                 struct skb_frag_struct *frag;
 959
 960                 frag = &skb_shinfo(skb)->frags[f];
 961                 len = frag->size;
 962                 offset = 0;
 963
 964                 while (len) {
 965                         size = min(len, DESC_BUF_SIZE);
 966
 967                         dma_map_page(&fep->ocpdev->dev,
 968                                      frag->page,
 969                                      frag->page_offset + offset,
 970                                      size, DMA_TO_DEVICE);
 971
 972                         ctrl = EMAC_TX_CTRL_DFLT | MAL_TX_CTRL_READY;
 973                         if ((NUM_TX_BUFF - 1) == fep->tx_slot)
 974                                 ctrl |= MAL_TX_CTRL_WRAP;
 975                         if ((f == (nr_frags - 1)) && (len == size)) {
 976                                 ctrl |= MAL_TX_CTRL_LAST;
 977                                 fep->tx_skb[fep->tx_slot] = skb;
 978                         }
 979
 980                         if (skb->ip_summed == CHECKSUM_HW)
 981                                 ctrl |= EMAC_TX_CTRL_TAH_CSUM;
 982
 983                         fep->tx_desc[fep->tx_slot].data_len = (short)size;
 984                         fep->tx_desc[fep->tx_slot].data_ptr =
 985                             (char *)((page_to_pfn(frag->page) << PAGE_SHIFT) +
 986                                      frag->page_offset + offset);
 987                         fep->tx_desc[fep->tx_slot].ctrl = ctrl;
 988
 989                         len -= size;
 990                         offset += size;
 991
 992                         /* Bump tx count */
 993                         if (++fep->tx_cnt == NUM_TX_BUFF)
 994                                 netif_stop_queue(dev);
 995
 996                         /* Next descriptor */
 997                         if (++fep->tx_slot == NUM_TX_BUFF)
 998                                 fep->tx_slot = 0;
 999                 }
1000         }
1001
1002         /*
1003          * Deferred set READY on first descriptor of packet to
1004          * avoid TX MAL race.
1005          */
1006         fep->tx_desc[tx_slot_first].ctrl |= MAL_TX_CTRL_READY;
1007
1008         /* Send the packet out. */
1009         out_be32(&emacp->em0tmr0, EMAC_TMR0_XMIT);
1010
1011         fep->stats.tx_packets++;
1012         fep->stats.tx_bytes += skb->len;
1013
1014         PKT_DEBUG(("emac_start_xmit() exitn"));
1015
1016         spin_unlock_irqrestore(&fep->lock, flags);
1017
1018         return 0;
1019 }
1020
1021 static int emac_adjust_to_link(struct ocp_enet_private *fep)
1022 {
1023         emac_t *emacp = fep->emacp;
1024         unsigned long mode_reg;
1025         int full_duplex, speed;
1026
1027         full_duplex = 0;
1028         speed = SPEED_10;
1029
1030         /* set mode register 1 defaults */
1031         mode_reg = EMAC_M1_DEFAULT;
1032
1033         /* Read link mode on PHY */
1034         if (fep->phy_mii.def->ops->read_link(&fep->phy_mii) == 0) {
1035                 /* If an error occurred, we don't deal with it yet */
1036                 full_duplex = (fep->phy_mii.duplex == DUPLEX_FULL);
1037                 speed = fep->phy_mii.speed;
1038         }
1039
1040
1041         /* set speed (default is 10Mb) */
1042         switch (speed) {
1043         case SPEED_1000:
1044                 mode_reg |= EMAC_M1_JUMBO_ENABLE | EMAC_M1_RFS_16K;
1045                 if (fep->rgmii_dev) {
1046                         struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(fep->rgmii_dev);
1047
1048                         if ((rgmii->mode[fep->rgmii_input] == RTBI)
1049                             || (rgmii->mode[fep->rgmii_input] == TBI))
1050                                 mode_reg |= EMAC_M1_MF_1000GPCS;
1051                         else
1052                                 mode_reg |= EMAC_M1_MF_1000MBPS;
1053
1054                         emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
1055                                               1000);
1056                 }
1057                 break;
1058         case SPEED_100:
1059                 mode_reg |= EMAC_M1_MF_100MBPS | EMAC_M1_RFS_4K;
1060                 if (fep->rgmii_dev)
1061                         emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
1062                                               100);
1063                 if (fep->zmii_dev)
1064                         emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
1065                                              100);
1066                 break;
1067         case SPEED_10:
1068         default:
1069                 mode_reg = (mode_reg & ~EMAC_M1_MF_100MBPS) | EMAC_M1_RFS_4K;
1070                 if (fep->rgmii_dev)
1071                         emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
1072                                               10);
1073                 if (fep->zmii_dev)
1074                         emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
1075                                              10);
1076         }
1077
1078         if (full_duplex)
1079                 mode_reg |= EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_IST;
1080         else
1081                 mode_reg &= ~(EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_ILE);
1082
1083         LINK_DEBUG(("%s: adjust to link, speed: %d, duplex: %d, opened: %d\n",
1084                     fep->ndev->name, speed, full_duplex, fep->opened));
1085
1086         printk(KERN_INFO "%s: Speed: %d, %s duplex.\n",
1087                fep->ndev->name, speed, full_duplex ? "Full" : "Half");
1088         if (fep->opened)
1089                 out_be32(&emacp->em0mr1, mode_reg);
1090
1091         return 0;
1092 }
1093
1094 static int emac_set_mac_address(struct net_device *ndev, void *p)
1095 {
1096         struct ocp_enet_private *fep = ndev->priv;
1097         emac_t *emacp = fep->emacp;
1098         struct sockaddr *addr = p;
1099
1100         if (!is_valid_ether_addr(addr->sa_data))
1101                 return -EADDRNOTAVAIL;
1102
1103         memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
1104
1105         /* set the high address */
1106         out_be32(&emacp->em0iahr,
1107                  (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
1108
1109         /* set the low address */
1110         out_be32(&emacp->em0ialr,
1111                  (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
1112                  | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
1113
1114         return 0;
1115 }
1116
1117 static int emac_change_mtu(struct net_device *dev, int new_mtu)
1118 {
1119         struct ocp_enet_private *fep = dev->priv;
1120         int old_mtu = dev->mtu;
1121         emac_t *emacp = fep->emacp;
1122         u32 em0mr0;
1123         int i, full;
1124         unsigned long flags;
1125
1126         if ((new_mtu < EMAC_MIN_MTU) || (new_mtu > EMAC_MAX_MTU)) {
1127                 printk(KERN_ERR
1128                        "emac: Invalid MTU setting, MTU must be between %d and %d\n",
1129                        EMAC_MIN_MTU, EMAC_MAX_MTU);
1130                 return -EINVAL;
1131         }
1132
1133         if (old_mtu != new_mtu && netif_running(dev)) {
1134                 /* Stop rx engine */
1135                 em0mr0 = in_be32(&emacp->em0mr0);
1136                 out_be32(&emacp->em0mr0, em0mr0 & ~EMAC_M0_RXE);
1137
1138                 /* Wait for descriptors to be empty */
1139                 do {
1140                         full = 0;
1141                         for (i = 0; i < NUM_RX_BUFF; i++)
1142                                 if (!(fep->rx_desc[i].ctrl & MAL_RX_CTRL_EMPTY)) {
1143                                         printk(KERN_NOTICE
1144                                                "emac: RX ring is still full\n");
1145                                         full = 1;
1146                                 }
1147                 } while (full);
1148
1149                 spin_lock_irqsave(&fep->lock, flags);
1150
1151                 mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
1152
1153                 /* Destroy all old rx skbs */
1154                 for (i = 0; i < NUM_RX_BUFF; i++) {
1155                         dma_unmap_single(&fep->ocpdev->dev,
1156                                          fep->rx_desc[i].data_ptr,
1157                                          fep->rx_desc[i].data_len,
1158                                          DMA_FROM_DEVICE);
1159                         dev_kfree_skb(fep->rx_skb[i]);
1160                         fep->rx_skb[i] = NULL;
1161                 }
1162
1163                 /* Set new rx_buffer_size and advertise new mtu */
1164                 fep->rx_buffer_size =
1165                     new_mtu + ENET_HEADER_SIZE + ENET_FCS_SIZE;
1166                 dev->mtu = new_mtu;
1167
1168                 /* Re-init rx skbs */
1169                 fep->rx_slot = 0;
1170                 emac_rx_fill(dev, 0);
1171
1172                 /* Restart the rx engine */
1173                 mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
1174                 out_be32(&emacp->em0mr0, em0mr0 | EMAC_M0_RXE);
1175
1176                 spin_unlock_irqrestore(&fep->lock, flags);
1177         }
1178
1179         return 0;
1180 }
1181
1182 static void __emac_set_multicast_list(struct net_device *dev)
1183 {
1184         struct ocp_enet_private *fep = dev->priv;
1185         emac_t *emacp = fep->emacp;
1186         u32 rmr = in_be32(&emacp->em0rmr);
1187
1188         /* First clear all special bits, they can be set later */
1189         rmr &= ~(EMAC_RMR_PME | EMAC_RMR_PMME | EMAC_RMR_MAE);
1190
1191         if (dev->flags & IFF_PROMISC) {
1192                 rmr |= EMAC_RMR_PME;
1193         } else if (dev->flags & IFF_ALLMULTI || 32 < dev->mc_count) {
1194                 /*
1195                  * Must be setting up to use multicast
1196                  * Now check for promiscuous multicast
1197                  */
1198                 rmr |= EMAC_RMR_PMME;
1199         } else if (dev->flags & IFF_MULTICAST && 0 < dev->mc_count) {
1200                 unsigned short em0gaht[4] = { 0, 0, 0, 0 };
1201                 struct dev_mc_list *dmi;
1202
1203                 /* Need to hash on the multicast address. */
1204                 for (dmi = dev->mc_list; dmi; dmi = dmi->next) {
1205                         unsigned long mc_crc;
1206                         unsigned int bit_number;
1207
1208                         mc_crc = ether_crc(6, (char *)dmi->dmi_addr);
1209                         bit_number = 63 - (mc_crc >> 26);       /* MSB: 0 LSB: 63 */
1210                         em0gaht[bit_number >> 4] |=
1211                             0x8000 >> (bit_number & 0x0f);
1212                 }
1213                 emacp->em0gaht1 = em0gaht[0];
1214                 emacp->em0gaht2 = em0gaht[1];
1215                 emacp->em0gaht3 = em0gaht[2];
1216                 emacp->em0gaht4 = em0gaht[3];
1217
1218                 /* Turn on multicast addressing */
1219                 rmr |= EMAC_RMR_MAE;
1220         }
1221         out_be32(&emacp->em0rmr, rmr);
1222 }
1223
1224 static int emac_init_tah(struct ocp_enet_private *fep)
1225 {
1226         tah_t *tahp;
1227
1228         /* Initialize TAH and enable checksum verification */
1229         tahp = (tah_t *) ioremap(fep->tah_dev->def->paddr, sizeof(*tahp));
1230
1231         if (tahp == NULL) {
1232                 printk(KERN_ERR "tah%d: Cannot ioremap TAH registers!\n",
1233                        fep->tah_dev->def->index);
1234
1235                 return -ENOMEM;
1236         }
1237
1238         out_be32(&tahp->tah_mr, TAH_MR_SR);
1239
1240         /* wait for reset to complete */
1241         while (in_be32(&tahp->tah_mr) & TAH_MR_SR) ;
1242
1243         /* 10KB TAH TX FIFO accomodates the max MTU of 9000 */
1244         out_be32(&tahp->tah_mr,
1245                  TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP |
1246                  TAH_MR_DIG);
1247
1248         iounmap(&tahp);
1249
1250         return 0;
1251 }
1252
1253 static void emac_init_rings(struct net_device *dev)
1254 {
1255         struct ocp_enet_private *ep = dev->priv;
1256         int loop;
1257
1258         ep->tx_desc = (struct mal_descriptor *)((char *)ep->mal->tx_virt_addr +
1259                                                 (ep->mal_tx_chan *
1260                                                  MAL_DT_ALIGN));
1261         ep->rx_desc =
1262             (struct mal_descriptor *)((char *)ep->mal->rx_virt_addr +
1263                                       (ep->mal_rx_chan * MAL_DT_ALIGN));
1264
1265         /* Fill in the transmit descriptor ring. */
1266         for (loop = 0; loop < NUM_TX_BUFF; loop++) {
1267                 if (ep->tx_skb[loop]) {
1268                         dma_unmap_single(&ep->ocpdev->dev,
1269                                          ep->tx_desc[loop].data_ptr,
1270                                          ep->tx_desc[loop].data_len,
1271                                          DMA_TO_DEVICE);
1272                         dev_kfree_skb_irq(ep->tx_skb[loop]);
1273                 }
1274                 ep->tx_skb[loop] = NULL;
1275                 ep->tx_desc[loop].ctrl = 0;
1276                 ep->tx_desc[loop].data_len = 0;
1277                 ep->tx_desc[loop].data_ptr = NULL;
1278         }
1279         ep->tx_desc[loop - 1].ctrl |= MAL_TX_CTRL_WRAP;
1280
1281         /* Format the receive descriptor ring. */
1282         ep->rx_slot = 0;
1283         /* Default is MTU=1500 + Ethernet overhead */
1284         ep->rx_buffer_size = ENET_DEF_BUF_SIZE;
1285         emac_rx_fill(dev, 0);
1286         if (ep->rx_slot != 0) {
1287                 printk(KERN_ERR
1288                        "%s: Not enough mem for RxChain durning Open?\n",
1289                        dev->name);
1290                 /*We couldn't fill the ring at startup?
1291                  *We could clean up and fail to open but right now we will try to
1292                  *carry on. It may be a sign of a bad NUM_RX_BUFF value
1293                  */
1294         }
1295
1296         ep->tx_cnt = 0;
1297         ep->tx_slot = 0;
1298         ep->ack_slot = 0;
1299 }
1300
1301 static void emac_reset_configure(struct ocp_enet_private *fep)
1302 {
1303         emac_t *emacp = fep->emacp;
1304         int i;
1305
1306         mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
1307         mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
1308
1309         /*
1310          * Check for a link, some PHYs don't provide a clock if
1311          * no link is present.  Some EMACs will not come out of
1312          * soft reset without a PHY clock present.
1313          */
1314         if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
1315                 /* Reset the EMAC */
1316                 out_be32(&emacp->em0mr0, EMAC_M0_SRST);
1317                 udelay(20);
1318                 for (i = 0; i < 100; i++) {
1319                         if ((in_be32(&emacp->em0mr0) & EMAC_M0_SRST) == 0)
1320                                 break;
1321                         udelay(10);
1322                 }
1323
1324                 if (i >= 100) {
1325                         printk(KERN_ERR "%s: Cannot reset EMAC\n",
1326                                fep->ndev->name);
1327                         return;
1328                 }
1329         }
1330
1331         /* Switch IRQs off for now */
1332         out_be32(&emacp->em0iser, 0);
1333
1334         /* Configure MAL rx channel */
1335         mal_set_rcbs(fep->mal, fep->mal_rx_chan, DESC_BUF_SIZE_REG);
1336
1337         /* set the high address */
1338         out_be32(&emacp->em0iahr,
1339                  (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
1340
1341         /* set the low address */
1342         out_be32(&emacp->em0ialr,
1343                  (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
1344                  | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
1345
1346         /* Adjust to link */
1347         if (netif_carrier_ok(fep->ndev))
1348                 emac_adjust_to_link(fep);
1349
1350         /* enable broadcast/individual address and RX FIFO defaults */
1351         out_be32(&emacp->em0rmr, EMAC_RMR_DEFAULT);
1352
1353         /* set transmit request threshold register */
1354         out_be32(&emacp->em0trtr, EMAC_TRTR_DEFAULT);
1355
1356         /* Reconfigure multicast */
1357         __emac_set_multicast_list(fep->ndev);
1358
1359         /* Set receiver/transmitter defaults */
1360         out_be32(&emacp->em0rwmr, EMAC_RWMR_DEFAULT);
1361         out_be32(&emacp->em0tmr0, EMAC_TMR0_DEFAULT);
1362         out_be32(&emacp->em0tmr1, EMAC_TMR1_DEFAULT);
1363
1364         /* set frame gap */
1365         out_be32(&emacp->em0ipgvr, CONFIG_IBM_EMAC_FGAP);
1366
1367         /* Init ring buffers */
1368         emac_init_rings(fep->ndev);
1369 }
1370
1371 static void emac_kick(struct ocp_enet_private *fep)
1372 {
1373         emac_t *emacp = fep->emacp;
1374         unsigned long emac_ier;
1375
1376         emac_ier = EMAC_ISR_PP | EMAC_ISR_BP | EMAC_ISR_RP |
1377             EMAC_ISR_SE | EMAC_ISR_PTLE | EMAC_ISR_ALE |
1378             EMAC_ISR_BFCS | EMAC_ISR_ORE | EMAC_ISR_IRE;
1379
1380         out_be32(&emacp->em0iser, emac_ier);
1381
1382         /* enable all MAL transmit and receive channels */
1383         mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
1384         mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
1385
1386         /* set transmit and receive enable */
1387         out_be32(&emacp->em0mr0, EMAC_M0_TXE | EMAC_M0_RXE);
1388 }
1389
1390 static void
1391 emac_start_link(struct ocp_enet_private *fep, struct ethtool_cmd *ep)
1392 {
1393         u32 advertise;
1394         int autoneg;
1395         int forced_speed;
1396         int forced_duplex;
1397
1398         /* Default advertise */
1399         advertise = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
1400             ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full |
1401             ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full;
1402         autoneg = fep->want_autoneg;
1403         forced_speed = fep->phy_mii.speed;
1404         forced_duplex = fep->phy_mii.duplex;
1405
1406         /* Setup link parameters */
1407         if (ep) {
1408                 if (ep->autoneg == AUTONEG_ENABLE) {
1409                         advertise = ep->advertising;
1410                         autoneg = 1;
1411                 } else {
1412                         autoneg = 0;
1413                         forced_speed = ep->speed;
1414                         forced_duplex = ep->duplex;
1415                 }
1416         }
1417
1418         /* Configure PHY & start aneg */
1419         fep->want_autoneg = autoneg;
1420         if (autoneg) {
1421                 LINK_DEBUG(("%s: start link aneg, advertise: 0x%x\n",
1422                             fep->ndev->name, advertise));
1423                 fep->phy_mii.def->ops->setup_aneg(&fep->phy_mii, advertise);
1424         } else {
1425                 LINK_DEBUG(("%s: start link forced, speed: %d, duplex: %d\n",
1426                             fep->ndev->name, forced_speed, forced_duplex));
1427                 fep->phy_mii.def->ops->setup_forced(&fep->phy_mii, forced_speed,
1428                                                     forced_duplex);
1429         }
1430         fep->timer_ticks = 0;
1431         mod_timer(&fep->link_timer, jiffies + HZ);
1432 }
1433
1434 static void emac_link_timer(unsigned long data)
1435 {
1436         struct ocp_enet_private *fep = (struct ocp_enet_private *)data;
1437         int link;
1438
1439         if (fep->going_away)
1440                 return;
1441
1442         spin_lock_irq(&fep->lock);
1443
1444         link = fep->phy_mii.def->ops->poll_link(&fep->phy_mii);
1445         LINK_DEBUG(("%s: poll_link: %d\n", fep->ndev->name, link));
1446
1447         if (link == netif_carrier_ok(fep->ndev)) {
1448                 if (!link && fep->want_autoneg && (++fep->timer_ticks) > 10)
1449                         emac_start_link(fep, NULL);
1450                 goto out;
1451         }
1452         printk(KERN_INFO "%s: Link is %s\n", fep->ndev->name,
1453                link ? "Up" : "Down");
1454         if (link) {
1455                 netif_carrier_on(fep->ndev);
1456                 /* Chip needs a full reset on config change. That sucks, so I
1457                  * should ultimately move that to some tasklet to limit
1458                  * latency peaks caused by this code
1459                  */
1460                 emac_reset_configure(fep);
1461                 if (fep->opened)
1462                         emac_kick(fep);
1463         } else {
1464                 fep->timer_ticks = 0;
1465                 netif_carrier_off(fep->ndev);
1466         }
1467       out:
1468         mod_timer(&fep->link_timer, jiffies + HZ);
1469         spin_unlock_irq(&fep->lock);
1470 }
1471
1472 static void emac_set_multicast_list(struct net_device *dev)
1473 {
1474         struct ocp_enet_private *fep = dev->priv;
1475
1476         spin_lock_irq(&fep->lock);
1477         __emac_set_multicast_list(dev);
1478         spin_unlock_irq(&fep->lock);
1479 }
1480
1481 static int emac_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
1482 {
1483         struct ocp_enet_private *fep = ndev->priv;
1484
1485         cmd->supported = fep->phy_mii.def->features;
1486         cmd->port = PORT_MII;
1487         cmd->transceiver = XCVR_EXTERNAL;
1488         cmd->phy_address = fep->mii_phy_addr;
1489         spin_lock_irq(&fep->lock);
1490         cmd->autoneg = fep->want_autoneg;
1491         cmd->speed = fep->phy_mii.speed;
1492         cmd->duplex = fep->phy_mii.duplex;
1493         spin_unlock_irq(&fep->lock);
1494         return 0;
1495 }
1496
1497 static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
1498 {
1499         struct ocp_enet_private *fep = ndev->priv;
1500         unsigned long features = fep->phy_mii.def->features;
1501
1502         if (!capable(CAP_NET_ADMIN))
1503                 return -EPERM;
1504
1505         if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
1506                 return -EINVAL;
1507         if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
1508                 return -EINVAL;
1509         if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
1510                 return -EINVAL;
1511         if (cmd->autoneg == AUTONEG_DISABLE)
1512                 switch (cmd->speed) {
1513                 case SPEED_10:
1514                         if (cmd->duplex == DUPLEX_HALF &&
1515                             (features & SUPPORTED_10baseT_Half) == 0)
1516                                 return -EINVAL;
1517                         if (cmd->duplex == DUPLEX_FULL &&
1518                             (features & SUPPORTED_10baseT_Full) == 0)
1519                                 return -EINVAL;
1520                         break;
1521                 case SPEED_100:
1522                         if (cmd->duplex == DUPLEX_HALF &&
1523                             (features & SUPPORTED_100baseT_Half) == 0)
1524                                 return -EINVAL;
1525                         if (cmd->duplex == DUPLEX_FULL &&
1526                             (features & SUPPORTED_100baseT_Full) == 0)
1527                                 return -EINVAL;
1528                         break;
1529                 case SPEED_1000:
1530                         if (cmd->duplex == DUPLEX_HALF &&
1531                             (features & SUPPORTED_1000baseT_Half) == 0)
1532                                 return -EINVAL;
1533                         if (cmd->duplex == DUPLEX_FULL &&
1534                             (features & SUPPORTED_1000baseT_Full) == 0)
1535                                 return -EINVAL;
1536                         break;
1537                 default:
1538                         return -EINVAL;
1539         } else if ((features & SUPPORTED_Autoneg) == 0)
1540                 return -EINVAL;
1541         spin_lock_irq(&fep->lock);
1542         emac_start_link(fep, cmd);
1543         spin_unlock_irq(&fep->lock);
1544         return 0;
1545 }
1546
1547 static void
1548 emac_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
1549 {
1550         struct ocp_enet_private *fep = ndev->priv;
1551
1552         strcpy(info->driver, DRV_NAME);
1553         strcpy(info->version, DRV_VERSION);
1554         info->fw_version[0] = '\0';
1555         sprintf(info->bus_info, "IBM EMAC %d", fep->ocpdev->def->index);
1556         info->regdump_len = 0;
1557 }
1558
1559 static int emac_nway_reset(struct net_device *ndev)
1560 {
1561         struct ocp_enet_private *fep = ndev->priv;
1562
1563         if (!fep->want_autoneg)
1564                 return -EINVAL;
1565         spin_lock_irq(&fep->lock);
1566         emac_start_link(fep, NULL);
1567         spin_unlock_irq(&fep->lock);
1568         return 0;
1569 }
1570
1571 static u32 emac_get_link(struct net_device *ndev)
1572 {
1573         return netif_carrier_ok(ndev);
1574 }
1575
1576 static struct ethtool_ops emac_ethtool_ops = {
1577         .get_settings = emac_get_settings,
1578         .set_settings = emac_set_settings,
1579         .get_drvinfo = emac_get_drvinfo,
1580         .nway_reset = emac_nway_reset,
1581         .get_link = emac_get_link
1582 };
1583
1584 static int emac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1585 {
1586         struct ocp_enet_private *fep = dev->priv;
1587         uint *data = (uint *) & rq->ifr_ifru;
1588
1589         switch (cmd) {
1590         case SIOCGMIIPHY:
1591                 data[0] = fep->mii_phy_addr;
1592                 /* Fall through */
1593         case SIOCGMIIREG:
1594                 data[3] = emac_phy_read(dev, fep->mii_phy_addr, data[1]);
1595                 return 0;
1596         case SIOCSMIIREG:
1597                 if (!capable(CAP_NET_ADMIN))
1598                         return -EPERM;
1599
1600                 emac_phy_write(dev, fep->mii_phy_addr, data[1], data[2]);
1601                 return 0;
1602         default:
1603                 return -EOPNOTSUPP;
1604         }
1605 }
1606
1607 static int emac_open(struct net_device *dev)
1608 {
1609         struct ocp_enet_private *fep = dev->priv;
1610         int rc;
1611
1612         spin_lock_irq(&fep->lock);
1613
1614         fep->opened = 1;
1615         netif_carrier_off(dev);
1616
1617         /* Reset & configure the chip */
1618         emac_reset_configure(fep);
1619
1620         spin_unlock_irq(&fep->lock);
1621
1622         /* Request our interrupt lines */
1623         rc = request_irq(dev->irq, emac_mac_irq, 0, "IBM EMAC MAC", dev);
1624         if (rc != 0) {
1625                 printk("dev->irq %d failed\n", dev->irq);
1626                 goto bail;
1627         }
1628         /* Kick the chip rx & tx channels into life */
1629         spin_lock_irq(&fep->lock);
1630         emac_kick(fep);
1631         spin_unlock_irq(&fep->lock);
1632
1633         netif_start_queue(dev);
1634       bail:
1635         return rc;
1636 }
1637
1638 static int emac_close(struct net_device *dev)
1639 {
1640         struct ocp_enet_private *fep = dev->priv;
1641         emac_t *emacp = fep->emacp;
1642
1643         /* XXX Stop IRQ emitting here */
1644         spin_lock_irq(&fep->lock);
1645         fep->opened = 0;
1646         mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
1647         mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
1648         netif_carrier_off(dev);
1649         netif_stop_queue(dev);
1650
1651         /*
1652          * Check for a link, some PHYs don't provide a clock if
1653          * no link is present.  Some EMACs will not come out of
1654          * soft reset without a PHY clock present.
1655          */
1656         if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
1657                 out_be32(&emacp->em0mr0, EMAC_M0_SRST);
1658                 udelay(10);
1659
1660                 if (emacp->em0mr0 & EMAC_M0_SRST) {
1661                         /*not sure what to do here hopefully it clears before another open */
1662                         printk(KERN_ERR
1663                                "%s: Phy SoftReset didn't clear, no link?\n",
1664                                dev->name);
1665                 }
1666         }
1667
1668         /* Free the irq's */
1669         free_irq(dev->irq, dev);
1670
1671         spin_unlock_irq(&fep->lock);
1672
1673         return 0;
1674 }
1675
1676 static void emac_remove(struct ocp_device *ocpdev)
1677 {
1678         struct net_device *dev = ocp_get_drvdata(ocpdev);
1679         struct ocp_enet_private *ep = dev->priv;
1680
1681         /* FIXME: locking, races, ... */
1682         ep->going_away = 1;
1683         ocp_set_drvdata(ocpdev, NULL);
1684         if (ep->rgmii_dev)
1685                 emac_close_rgmii(ep->rgmii_dev);
1686         if (ep->zmii_dev)
1687                 emac_close_zmii(ep->zmii_dev);
1688
1689         unregister_netdev(dev);
1690         del_timer_sync(&ep->link_timer);
1691         mal_unregister_commac(ep->mal, &ep->commac);
1692         iounmap((void *)ep->emacp);
1693         kfree(dev);
1694 }
1695
1696 struct mal_commac_ops emac_commac_ops = {
1697         .txeob = &emac_txeob_dev,
1698         .txde = &emac_txde_dev,
1699         .rxeob = &emac_rxeob_dev,
1700         .rxde = &emac_rxde_dev,
1701 };
1702
1703 static int emac_init_device(struct ocp_device *ocpdev, struct ibm_ocp_mal *mal)
1704 {
1705         int deferred_init = 0;
1706         int rc = 0, i;
1707         struct net_device *ndev;
1708         struct ocp_enet_private *ep;
1709         struct ocp_func_emac_data *emacdata;
1710         int commac_reg = 0;
1711         u32 phy_map;
1712
1713         emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
1714         if (!emacdata) {
1715                 printk(KERN_ERR "emac%d: Missing additional data!\n",
1716                        ocpdev->def->index);
1717                 return -ENODEV;
1718         }
1719
1720         /* Allocate our net_device structure */
1721         ndev = alloc_etherdev(sizeof(struct ocp_enet_private));
1722         if (ndev == NULL) {
1723                 printk(KERN_ERR
1724                        "emac%d: Could not allocate ethernet device.\n",
1725                        ocpdev->def->index);
1726                 return -ENOMEM;
1727         }
1728         ep = ndev->priv;
1729         ep->ndev = ndev;
1730         ep->ocpdev = ocpdev;
1731         ndev->irq = ocpdev->def->irq;
1732         ep->wol_irq = emacdata->wol_irq;
1733         if (emacdata->mdio_idx >= 0) {
1734                 if (emacdata->mdio_idx == ocpdev->def->index) {
1735                         /* Set the common MDIO net_device */
1736                         mdio_ndev = ndev;
1737                         deferred_init = 1;
1738                 }
1739                 ep->mdio_dev = mdio_ndev;
1740         } else {
1741                 ep->mdio_dev = ndev;
1742         }
1743
1744         ocp_set_drvdata(ocpdev, ndev);
1745
1746         spin_lock_init(&ep->lock);
1747
1748         /* Fill out MAL informations and register commac */
1749         ep->mal = mal;
1750         ep->mal_tx_chan = emacdata->mal_tx_chan;
1751         ep->mal_rx_chan = emacdata->mal_rx_chan;
1752         ep->commac.ops = &emac_commac_ops;
1753         ep->commac.dev = ndev;
1754         ep->commac.tx_chan_mask = MAL_CHAN_MASK(ep->mal_tx_chan);
1755         ep->commac.rx_chan_mask = MAL_CHAN_MASK(ep->mal_rx_chan);
1756         rc = mal_register_commac(ep->mal, &ep->commac);
1757         if (rc != 0)
1758                 goto bail;
1759         commac_reg = 1;
1760
1761         /* Map our MMIOs */
1762         ep->emacp = (emac_t *) ioremap(ocpdev->def->paddr, sizeof(emac_t));
1763
1764         /* Check if we need to attach to a ZMII */
1765         if (emacdata->zmii_idx >= 0) {
1766                 ep->zmii_input = emacdata->zmii_mux;
1767                 ep->zmii_dev =
1768                     ocp_find_device(OCP_ANY_ID, OCP_FUNC_ZMII,
1769                                     emacdata->zmii_idx);
1770                 if (ep->zmii_dev == NULL)
1771                         printk(KERN_WARNING
1772                                "emac%d: ZMII %d requested but not found !\n",
1773                                ocpdev->def->index, emacdata->zmii_idx);
1774                 else if ((rc =
1775                           emac_init_zmii(ep->zmii_dev, ep->zmii_input,
1776                                          emacdata->phy_mode)) != 0)
1777                         goto bail;
1778         }
1779
1780         /* Check if we need to attach to a RGMII */
1781         if (emacdata->rgmii_idx >= 0) {
1782                 ep->rgmii_input = emacdata->rgmii_mux;
1783                 ep->rgmii_dev =
1784                     ocp_find_device(OCP_ANY_ID, OCP_FUNC_RGMII,
1785                                     emacdata->rgmii_idx);
1786                 if (ep->rgmii_dev == NULL)
1787                         printk(KERN_WARNING
1788                                "emac%d: RGMII %d requested but not found !\n",
1789                                ocpdev->def->index, emacdata->rgmii_idx);
1790                 else if ((rc =
1791                           emac_init_rgmii(ep->rgmii_dev, ep->rgmii_input,
1792                                           emacdata->phy_mode)) != 0)
1793                         goto bail;
1794         }
1795
1796         /* Check if we need to attach to a TAH */
1797         if (emacdata->tah_idx >= 0) {
1798                 ep->tah_dev =
1799                     ocp_find_device(OCP_ANY_ID, OCP_FUNC_TAH,
1800                                     emacdata->tah_idx);
1801                 if (ep->tah_dev == NULL)
1802                         printk(KERN_WARNING
1803                                "emac%d: TAH %d requested but not found !\n",
1804                                ocpdev->def->index, emacdata->tah_idx);
1805                 else if ((rc = emac_init_tah(ep)) != 0)
1806                         goto bail;
1807         }
1808
1809         if (deferred_init) {
1810                 if (!list_empty(&emac_init_list)) {
1811                         struct list_head *entry;
1812                         struct emac_def_dev *ddev;
1813
1814                         list_for_each(entry, &emac_init_list) {
1815                                 ddev =
1816                                     list_entry(entry, struct emac_def_dev,
1817                                                link);
1818                                 emac_init_device(ddev->ocpdev, ddev->mal);
1819                         }
1820                 }
1821         }
1822
1823         /* Init link monitoring timer */
1824         init_timer(&ep->link_timer);
1825         ep->link_timer.function = emac_link_timer;
1826         ep->link_timer.data = (unsigned long)ep;
1827         ep->timer_ticks = 0;
1828
1829         /* Fill up the mii_phy structure */
1830         ep->phy_mii.dev = ndev;
1831         ep->phy_mii.mdio_read = emac_phy_read;
1832         ep->phy_mii.mdio_write = emac_phy_write;
1833         ep->phy_mii.mode = emacdata->phy_mode;
1834
1835         /* Find PHY */
1836         phy_map = emacdata->phy_map | busy_phy_map;
1837         for (i = 0; i <= 0x1f; i++, phy_map >>= 1) {
1838                 if ((phy_map & 0x1) == 0) {
1839                         int val = emac_phy_read(ndev, i, MII_BMCR);
1840                         if (val != 0xffff && val != -1)
1841                                 break;
1842                 }
1843         }
1844         if (i == 0x20) {
1845                 printk(KERN_WARNING "emac%d: Can't find PHY.\n",
1846                        ocpdev->def->index);
1847                 rc = -ENODEV;
1848                 goto bail;
1849         }
1850         busy_phy_map |= 1 << i;
1851         ep->mii_phy_addr = i;
1852         rc = mii_phy_probe(&ep->phy_mii, i);
1853         if (rc) {
1854                 printk(KERN_WARNING "emac%d: Failed to probe PHY type.\n",
1855                        ocpdev->def->index);
1856                 rc = -ENODEV;
1857                 goto bail;
1858         }
1859
1860         /* Setup initial PHY config & startup aneg */
1861         if (ep->phy_mii.def->ops->init)
1862                 ep->phy_mii.def->ops->init(&ep->phy_mii);
1863         netif_carrier_off(ndev);
1864         if (ep->phy_mii.def->features & SUPPORTED_Autoneg)
1865                 ep->want_autoneg = 1;
1866         emac_start_link(ep, NULL);
1867
1868         /* read the MAC Address */
1869         for (i = 0; i < 6; i++)
1870                 ndev->dev_addr[i] = emacdata->mac_addr[i];
1871
1872         /* Fill in the driver function table */
1873         ndev->open = &emac_open;
1874         ndev->hard_start_xmit = &emac_start_xmit;
1875         ndev->stop = &emac_close;
1876         ndev->get_stats = &emac_stats;
1877         if (emacdata->jumbo)
1878                 ndev->change_mtu = &emac_change_mtu;
1879         ndev->set_mac_address = &emac_set_mac_address;
1880         ndev->set_multicast_list = &emac_set_multicast_list;
1881         ndev->do_ioctl = &emac_ioctl;
1882         SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
1883         if (emacdata->tah_idx >= 0)
1884                 ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG;
1885
1886         SET_MODULE_OWNER(ndev);
1887
1888         rc = register_netdev(ndev);
1889         if (rc != 0)
1890                 goto bail;
1891
1892         printk("%s: IBM emac, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
1893                ndev->name,
1894                ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
1895                ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
1896         printk(KERN_INFO "%s: Found %s PHY (0x%02x)\n",
1897                ndev->name, ep->phy_mii.def->name, ep->mii_phy_addr);
1898
1899       bail:
1900         if (rc && commac_reg)
1901                 mal_unregister_commac(ep->mal, &ep->commac);
1902         if (rc && ndev)
1903                 kfree(ndev);
1904
1905         return rc;
1906 }
1907
1908 static int emac_probe(struct ocp_device *ocpdev)
1909 {
1910         struct ocp_device *maldev;
1911         struct ibm_ocp_mal *mal;
1912         struct ocp_func_emac_data *emacdata;
1913
1914         emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
1915         if (emacdata == NULL) {
1916                 printk(KERN_ERR "emac%d: Missing additional datas !\n",
1917                        ocpdev->def->index);
1918                 return -ENODEV;
1919         }
1920
1921         /* Get the MAL device  */
1922         maldev = ocp_find_device(OCP_ANY_ID, OCP_FUNC_MAL, emacdata->mal_idx);
1923         if (maldev == NULL) {
1924                 printk("No maldev\n");
1925                 return -ENODEV;
1926         }
1927         /*
1928          * Get MAL driver data, it must be here due to link order.
1929          * When the driver is modularized, symbol dependencies will
1930          * ensure the MAL driver is already present if built as a
1931          * module.
1932          */
1933         mal = (struct ibm_ocp_mal *)ocp_get_drvdata(maldev);
1934         if (mal == NULL) {
1935                 printk("No maldrv\n");
1936                 return -ENODEV;
1937         }
1938
1939         /* If we depend on another EMAC for MDIO, wait for it to show up */
1940         if (emacdata->mdio_idx >= 0 &&
1941             (emacdata->mdio_idx != ocpdev->def->index) && !mdio_ndev) {
1942                 struct emac_def_dev *ddev;
1943                 /* Add this index to the deferred init table */
1944                 ddev = kmalloc(sizeof(struct emac_def_dev), GFP_KERNEL);
1945                 ddev->ocpdev = ocpdev;
1946                 ddev->mal = mal;
1947                 list_add_tail(&ddev->link, &emac_init_list);
1948         } else {
1949                 emac_init_device(ocpdev, mal);
1950         }
1951
1952         return 0;
1953 }
1954
1955 /* Structure for a device driver */
1956 static struct ocp_device_id emac_ids[] = {
1957         {.vendor = OCP_ANY_ID,.function = OCP_FUNC_EMAC},
1958         {.vendor = OCP_VENDOR_INVALID}
1959 };
1960
1961 static struct ocp_driver emac_driver = {
1962         .name = "emac",
1963         .id_table = emac_ids,
1964
1965         .probe = emac_probe,
1966         .remove = emac_remove,
1967 };
1968
1969 static int __init emac_init(void)
1970 {
1971         printk(KERN_INFO DRV_NAME ": " DRV_DESC ", version " DRV_VERSION "\n");
1972         printk(KERN_INFO "Maintained by " DRV_AUTHOR "\n");
1973
1974         if (skb_res > 2) {
1975                 printk(KERN_WARNING "Invalid skb_res: %d, cropping to 2\n",
1976                        skb_res);
1977                 skb_res = 2;
1978         }
1979
1980         return ocp_register_driver(&emac_driver);
1981 }
1982
1983 static void __exit emac_exit(void)
1984 {
1985         ocp_unregister_driver(&emac_driver);
1986 }
1987
1988 module_init(emac_init);
1989 module_exit(emac_exit);