drivers/net/ethernet/korina.c

   1 /*
   2  *  Driver for the IDT RC32434 (Korina) on-chip ethernet controller.
   3  *
   4  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
   5  *  Copyright 2006 Felix Fietkau <nbd@openwrt.org>
   6  *  Copyright 2008 Florian Fainelli <florian@openwrt.org>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *  Writing to a DMA status register:
  29  *
  30  *  When writing to the status register, you should mask the bit you have
  31  *  been testing the status register with. Both Tx and Rx DMA registers
  32  *  should stick to this procedure.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/kernel.h>
  37 #include <linux/moduleparam.h>
  38 #include <linux/sched.h>
  39 #include <linux/ctype.h>
  40 #include <linux/types.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/ioport.h>
  43 #include <linux/in.h>
  44 #include <linux/slab.h>
  45 #include <linux/string.h>
  46 #include <linux/delay.h>
  47 #include <linux/netdevice.h>
  48 #include <linux/etherdevice.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/errno.h>
  51 #include <linux/platform_device.h>
  52 #include <linux/mii.h>
  53 #include <linux/ethtool.h>
  54 #include <linux/crc32.h>
  55
  56 #include <asm/bootinfo.h>
  57 #include <asm/bitops.h>
  58 #include <asm/pgtable.h>
  59 #include <asm/io.h>
  60 #include <asm/dma.h>
  61
  62 #include <asm/mach-rc32434/rb.h>
  63 #include <asm/mach-rc32434/rc32434.h>
  64 #include <asm/mach-rc32434/eth.h>
  65 #include <asm/mach-rc32434/dma_v.h>
  66
  67 #define DRV_NAME        "korina"
  68 #define DRV_VERSION     "0.10"
  69 #define DRV_RELDATE     "04Mar2008"
  70
  71 #define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \
  72                                    ((dev)->dev_addr[1]))
  73 #define STATION_ADDRESS_LOW(dev)  (((dev)->dev_addr[2] << 24) | \
  74                                    ((dev)->dev_addr[3] << 16) | \
  75                                    ((dev)->dev_addr[4] << 8)  | \
  76                                    ((dev)->dev_addr[5]))
  77
  78 #define MII_CLOCK 1250000       /* no more than 2.5MHz */
  79
  80 /* the following must be powers of two */
  81 #define KORINA_NUM_RDS  64  /* number of receive descriptors */
  82 #define KORINA_NUM_TDS  64  /* number of transmit descriptors */
  83
  84 /* KORINA_RBSIZE is the hardware's default maximum receive
  85  * frame size in bytes. Having this hardcoded means that there
  86  * is no support for MTU sizes greater than 1500. */
  87 #define KORINA_RBSIZE   1536 /* size of one resource buffer = Ether MTU */
  88 #define KORINA_RDS_MASK (KORINA_NUM_RDS - 1)
  89 #define KORINA_TDS_MASK (KORINA_NUM_TDS - 1)
  90 #define RD_RING_SIZE    (KORINA_NUM_RDS * sizeof(struct dma_desc))
  91 #define TD_RING_SIZE    (KORINA_NUM_TDS * sizeof(struct dma_desc))
  92
  93 #define TX_TIMEOUT      (6000 * HZ / 1000)
  94
  95 enum chain_status { desc_filled, desc_empty };
  96 #define IS_DMA_FINISHED(X)   (((X) & (DMA_DESC_FINI)) != 0)
  97 #define IS_DMA_DONE(X)   (((X) & (DMA_DESC_DONE)) != 0)
  98 #define RCVPKT_LENGTH(X)     (((X) & ETH_RX_LEN) >> ETH_RX_LEN_BIT)
  99
 100 /* Information that need to be kept for each board. */
 101 struct korina_private {
 102         struct eth_regs *eth_regs;
 103         struct dma_reg *rx_dma_regs;
 104         struct dma_reg *tx_dma_regs;
 105         struct dma_desc *td_ring; /* transmit descriptor ring */
 106         struct dma_desc *rd_ring; /* receive descriptor ring  */
 107
 108         struct sk_buff *tx_skb[KORINA_NUM_TDS];
 109         struct sk_buff *rx_skb[KORINA_NUM_RDS];
 110
 111         int rx_next_done;
 112         int rx_chain_head;
 113         int rx_chain_tail;
 114         enum chain_status rx_chain_status;
 115
 116         int tx_next_done;
 117         int tx_chain_head;
 118         int tx_chain_tail;
 119         enum chain_status tx_chain_status;
 120         int tx_count;
 121         int tx_full;
 122
 123         int rx_irq;
 124         int tx_irq;
 125         int ovr_irq;
 126         int und_irq;
 127
 128         spinlock_t lock;        /* NIC xmit lock */
 129
 130         int dma_halt_cnt;
 131         int dma_run_cnt;
 132         struct napi_struct napi;
 133         struct timer_list media_check_timer;
 134         struct mii_if_info mii_if;
 135         struct work_struct restart_task;
 136         struct net_device *dev;
 137         int phy_addr;
 138 };
 139
 140 extern unsigned int idt_cpu_freq;
 141
 142 static inline void korina_start_dma(struct dma_reg *ch, u32 dma_addr)
 143 {
 144         writel(0, &ch->dmandptr);
 145         writel(dma_addr, &ch->dmadptr);
 146 }
 147
 148 static inline void korina_abort_dma(struct net_device *dev,
 149                                         struct dma_reg *ch)
 150 {
 151        if (readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
 152                writel(0x10, &ch->dmac);
 153
 154                while (!(readl(&ch->dmas) & DMA_STAT_HALT))
 155                        netif_trans_update(dev);
 156
 157                writel(0, &ch->dmas);
 158        }
 159
 160        writel(0, &ch->dmadptr);
 161        writel(0, &ch->dmandptr);
 162 }
 163
 164 static inline void korina_chain_dma(struct dma_reg *ch, u32 dma_addr)
 165 {
 166         writel(dma_addr, &ch->dmandptr);
 167 }
 168
 169 static void korina_abort_tx(struct net_device *dev)
 170 {
 171         struct korina_private *lp = netdev_priv(dev);
 172
 173         korina_abort_dma(dev, lp->tx_dma_regs);
 174 }
 175
 176 static void korina_abort_rx(struct net_device *dev)
 177 {
 178         struct korina_private *lp = netdev_priv(dev);
 179
 180         korina_abort_dma(dev, lp->rx_dma_regs);
 181 }
 182
 183 static void korina_start_rx(struct korina_private *lp,
 184                                         struct dma_desc *rd)
 185 {
 186         korina_start_dma(lp->rx_dma_regs, CPHYSADDR(rd));
 187 }
 188
 189 static void korina_chain_rx(struct korina_private *lp,
 190                                         struct dma_desc *rd)
 191 {
 192         korina_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd));
 193 }
 194
 195 /* transmit packet */
 196 static int korina_send_packet(struct sk_buff *skb, struct net_device *dev)
 197 {
 198         struct korina_private *lp = netdev_priv(dev);
 199         unsigned long flags;
 200         u32 length;
 201         u32 chain_prev, chain_next;
 202         struct dma_desc *td;
 203
 204         spin_lock_irqsave(&lp->lock, flags);
 205
 206         td = &lp->td_ring[lp->tx_chain_tail];
 207
 208         /* stop queue when full, drop pkts if queue already full */
 209         if (lp->tx_count >= (KORINA_NUM_TDS - 2)) {
 210                 lp->tx_full = 1;
 211
 212                 if (lp->tx_count == (KORINA_NUM_TDS - 2))
 213                         netif_stop_queue(dev);
 214                 else {
 215                         dev->stats.tx_dropped++;
 216                         dev_kfree_skb_any(skb);
 217                         spin_unlock_irqrestore(&lp->lock, flags);
 218
 219                         return NETDEV_TX_BUSY;
 220                 }
 221         }
 222
 223         lp->tx_count++;
 224
 225         lp->tx_skb[lp->tx_chain_tail] = skb;
 226
 227         length = skb->len;
 228         dma_cache_wback((u32)skb->data, skb->len);
 229
 230         /* Setup the transmit descriptor. */
 231         dma_cache_inv((u32) td, sizeof(*td));
 232         td->ca = CPHYSADDR(skb->data);
 233         chain_prev = (lp->tx_chain_tail - 1) & KORINA_TDS_MASK;
 234         chain_next = (lp->tx_chain_tail + 1) & KORINA_TDS_MASK;
 235
 236         if (readl(&(lp->tx_dma_regs->dmandptr)) == 0) {
 237                 if (lp->tx_chain_status == desc_empty) {
 238                         /* Update tail */
 239                         td->control = DMA_COUNT(length) |
 240                                         DMA_DESC_COF | DMA_DESC_IOF;
 241                         /* Move tail */
 242                         lp->tx_chain_tail = chain_next;
 243                         /* Write to NDPTR */
 244                         writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
 245                                         &lp->tx_dma_regs->dmandptr);
 246                         /* Move head to tail */
 247                         lp->tx_chain_head = lp->tx_chain_tail;
 248                 } else {
 249                         /* Update tail */
 250                         td->control = DMA_COUNT(length) |
 251                                         DMA_DESC_COF | DMA_DESC_IOF;
 252                         /* Link to prev */
 253                         lp->td_ring[chain_prev].control &=
 254                                         ~DMA_DESC_COF;
 255                         /* Link to prev */
 256                         lp->td_ring[chain_prev].link =  CPHYSADDR(td);
 257                         /* Move tail */
 258                         lp->tx_chain_tail = chain_next;
 259                         /* Write to NDPTR */
 260                         writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
 261                                         &(lp->tx_dma_regs->dmandptr));
 262                         /* Move head to tail */
 263                         lp->tx_chain_head = lp->tx_chain_tail;
 264                         lp->tx_chain_status = desc_empty;
 265                 }
 266         } else {
 267                 if (lp->tx_chain_status == desc_empty) {
 268                         /* Update tail */
 269                         td->control = DMA_COUNT(length) |
 270                                         DMA_DESC_COF | DMA_DESC_IOF;
 271                         /* Move tail */
 272                         lp->tx_chain_tail = chain_next;
 273                         lp->tx_chain_status = desc_filled;
 274                 } else {
 275                         /* Update tail */
 276                         td->control = DMA_COUNT(length) |
 277                                         DMA_DESC_COF | DMA_DESC_IOF;
 278                         lp->td_ring[chain_prev].control &=
 279                                         ~DMA_DESC_COF;
 280                         lp->td_ring[chain_prev].link =  CPHYSADDR(td);
 281                         lp->tx_chain_tail = chain_next;
 282                 }
 283         }
 284         dma_cache_wback((u32) td, sizeof(*td));
 285
 286         netif_trans_update(dev);
 287         spin_unlock_irqrestore(&lp->lock, flags);
 288
 289         return NETDEV_TX_OK;
 290 }
 291
 292 static int mdio_read(struct net_device *dev, int mii_id, int reg)
 293 {
 294         struct korina_private *lp = netdev_priv(dev);
 295         int ret;
 296
 297         mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8);
 298
 299         writel(0, &lp->eth_regs->miimcfg);
 300         writel(0, &lp->eth_regs->miimcmd);
 301         writel(mii_id | reg, &lp->eth_regs->miimaddr);
 302         writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd);
 303
 304         ret = (int)(readl(&lp->eth_regs->miimrdd));
 305         return ret;
 306 }
 307
 308 static void mdio_write(struct net_device *dev, int mii_id, int reg, int val)
 309 {
 310         struct korina_private *lp = netdev_priv(dev);
 311
 312         mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8);
 313
 314         writel(0, &lp->eth_regs->miimcfg);
 315         writel(1, &lp->eth_regs->miimcmd);
 316         writel(mii_id | reg, &lp->eth_regs->miimaddr);
 317         writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd);
 318         writel(val, &lp->eth_regs->miimwtd);
 319 }
 320
 321 /* Ethernet Rx DMA interrupt */
 322 static irqreturn_t korina_rx_dma_interrupt(int irq, void *dev_id)
 323 {
 324         struct net_device *dev = dev_id;
 325         struct korina_private *lp = netdev_priv(dev);
 326         u32 dmas, dmasm;
 327         irqreturn_t retval;
 328
 329         dmas = readl(&lp->rx_dma_regs->dmas);
 330         if (dmas & (DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR)) {
 331                 dmasm = readl(&lp->rx_dma_regs->dmasm);
 332                 writel(dmasm | (DMA_STAT_DONE |
 333                                 DMA_STAT_HALT | DMA_STAT_ERR),
 334                                 &lp->rx_dma_regs->dmasm);
 335
 336                 napi_schedule(&lp->napi);
 337
 338                 if (dmas & DMA_STAT_ERR)
 339                         printk(KERN_ERR "%s: DMA error\n", dev->name);
 340
 341                 retval = IRQ_HANDLED;
 342         } else
 343                 retval = IRQ_NONE;
 344
 345         return retval;
 346 }
 347
 348 static int korina_rx(struct net_device *dev, int limit)
 349 {
 350         struct korina_private *lp = netdev_priv(dev);
 351         struct dma_desc *rd = &lp->rd_ring[lp->rx_next_done];
 352         struct sk_buff *skb, *skb_new;
 353         u8 *pkt_buf;
 354         u32 devcs, pkt_len, dmas;
 355         int count;
 356
 357         dma_cache_inv((u32)rd, sizeof(*rd));
 358
 359         for (count = 0; count < limit; count++) {
 360                 skb = lp->rx_skb[lp->rx_next_done];
 361                 skb_new = NULL;
 362
 363                 devcs = rd->devcs;
 364
 365                 if ((KORINA_RBSIZE - (u32)DMA_COUNT(rd->control)) == 0)
 366                         break;
 367
 368                 /* Update statistics counters */
 369                 if (devcs & ETH_RX_CRC)
 370                         dev->stats.rx_crc_errors++;
 371                 if (devcs & ETH_RX_LOR)
 372                         dev->stats.rx_length_errors++;
 373                 if (devcs & ETH_RX_LE)
 374                         dev->stats.rx_length_errors++;
 375                 if (devcs & ETH_RX_OVR)
 376                         dev->stats.rx_fifo_errors++;
 377                 if (devcs & ETH_RX_CV)
 378                         dev->stats.rx_frame_errors++;
 379                 if (devcs & ETH_RX_CES)
 380                         dev->stats.rx_length_errors++;
 381                 if (devcs & ETH_RX_MP)
 382                         dev->stats.multicast++;
 383
 384                 if ((devcs & ETH_RX_LD) != ETH_RX_LD) {
 385                         /* check that this is a whole packet
 386                          * WARNING: DMA_FD bit incorrectly set
 387                          * in Rc32434 (errata ref #077) */
 388                         dev->stats.rx_errors++;
 389                         dev->stats.rx_dropped++;
 390                 } else if ((devcs & ETH_RX_ROK)) {
 391                         pkt_len = RCVPKT_LENGTH(devcs);
 392
 393                         /* must be the (first and) last
 394                          * descriptor then */
 395                         pkt_buf = (u8 *)lp->rx_skb[lp->rx_next_done]->data;
 396
 397                         /* invalidate the cache */
 398                         dma_cache_inv((unsigned long)pkt_buf, pkt_len - 4);
 399
 400                         /* Malloc up new buffer. */
 401                         skb_new = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE);
 402
 403                         if (!skb_new)
 404                                 break;
 405                         /* Do not count the CRC */
 406                         skb_put(skb, pkt_len - 4);
 407                         skb->protocol = eth_type_trans(skb, dev);
 408
 409                         /* Pass the packet to upper layers */
 410                         netif_receive_skb(skb);
 411                         dev->stats.rx_packets++;
 412                         dev->stats.rx_bytes += pkt_len;
 413
 414                         /* Update the mcast stats */
 415                         if (devcs & ETH_RX_MP)
 416                                 dev->stats.multicast++;
 417
 418                         lp->rx_skb[lp->rx_next_done] = skb_new;
 419                 }
 420
 421                 rd->devcs = 0;
 422
 423                 /* Restore descriptor's curr_addr */
 424                 if (skb_new)
 425                         rd->ca = CPHYSADDR(skb_new->data);
 426                 else
 427                         rd->ca = CPHYSADDR(skb->data);
 428
 429                 rd->control = DMA_COUNT(KORINA_RBSIZE) |
 430                         DMA_DESC_COD | DMA_DESC_IOD;
 431                 lp->rd_ring[(lp->rx_next_done - 1) &
 432                         KORINA_RDS_MASK].control &=
 433                         ~DMA_DESC_COD;
 434
 435                 lp->rx_next_done = (lp->rx_next_done + 1) & KORINA_RDS_MASK;
 436                 dma_cache_wback((u32)rd, sizeof(*rd));
 437                 rd = &lp->rd_ring[lp->rx_next_done];
 438                 writel(~DMA_STAT_DONE, &lp->rx_dma_regs->dmas);
 439         }
 440
 441         dmas = readl(&lp->rx_dma_regs->dmas);
 442
 443         if (dmas & DMA_STAT_HALT) {
 444                 writel(~(DMA_STAT_HALT | DMA_STAT_ERR),
 445                                 &lp->rx_dma_regs->dmas);
 446
 447                 lp->dma_halt_cnt++;
 448                 rd->devcs = 0;
 449                 skb = lp->rx_skb[lp->rx_next_done];
 450                 rd->ca = CPHYSADDR(skb->data);
 451                 dma_cache_wback((u32)rd, sizeof(*rd));
 452                 korina_chain_rx(lp, rd);
 453         }
 454
 455         return count;
 456 }
 457
 458 static int korina_poll(struct napi_struct *napi, int budget)
 459 {
 460         struct korina_private *lp =
 461                 container_of(napi, struct korina_private, napi);
 462         struct net_device *dev = lp->dev;
 463         int work_done;
 464
 465         work_done = korina_rx(dev, budget);
 466         if (work_done < budget) {
 467                 napi_complete_done(napi, work_done);
 468
 469                 writel(readl(&lp->rx_dma_regs->dmasm) &
 470                         ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
 471                         &lp->rx_dma_regs->dmasm);
 472         }
 473         return work_done;
 474 }
 475
 476 /*
 477  * Set or clear the multicast filter for this adaptor.
 478  */
 479 static void korina_multicast_list(struct net_device *dev)
 480 {
 481         struct korina_private *lp = netdev_priv(dev);
 482         unsigned long flags;
 483         struct netdev_hw_addr *ha;
 484         u32 recognise = ETH_ARC_AB;     /* always accept broadcasts */
 485
 486         /* Set promiscuous mode */
 487         if (dev->flags & IFF_PROMISC)
 488                 recognise |= ETH_ARC_PRO;
 489
 490         else if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 4))
 491                 /* All multicast and broadcast */
 492                 recognise |= ETH_ARC_AM;
 493
 494         /* Build the hash table */
 495         if (netdev_mc_count(dev) > 4) {
 496                 u16 hash_table[4] = { 0 };
 497                 u32 crc;
 498
 499                 netdev_for_each_mc_addr(ha, dev) {
 500                         crc = ether_crc_le(6, ha->addr);
 501                         crc >>= 26;
 502                         hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
 503                 }
 504                 /* Accept filtered multicast */
 505                 recognise |= ETH_ARC_AFM;
 506
 507                 /* Fill the MAC hash tables with their values */
 508                 writel((u32)(hash_table[1] << 16 | hash_table[0]),
 509                                         &lp->eth_regs->ethhash0);
 510                 writel((u32)(hash_table[3] << 16 | hash_table[2]),
 511                                         &lp->eth_regs->ethhash1);
 512         }
 513
 514         spin_lock_irqsave(&lp->lock, flags);
 515         writel(recognise, &lp->eth_regs->etharc);
 516         spin_unlock_irqrestore(&lp->lock, flags);
 517 }
 518
 519 static void korina_tx(struct net_device *dev)
 520 {
 521         struct korina_private *lp = netdev_priv(dev);
 522         struct dma_desc *td = &lp->td_ring[lp->tx_next_done];
 523         u32 devcs;
 524         u32 dmas;
 525
 526         spin_lock(&lp->lock);
 527
 528         /* Process all desc that are done */
 529         while (IS_DMA_FINISHED(td->control)) {
 530                 if (lp->tx_full == 1) {
 531                         netif_wake_queue(dev);
 532                         lp->tx_full = 0;
 533                 }
 534
 535                 devcs = lp->td_ring[lp->tx_next_done].devcs;
 536                 if ((devcs & (ETH_TX_FD | ETH_TX_LD)) !=
 537                                 (ETH_TX_FD | ETH_TX_LD)) {
 538                         dev->stats.tx_errors++;
 539                         dev->stats.tx_dropped++;
 540
 541                         /* Should never happen */
 542                         printk(KERN_ERR "%s: split tx ignored\n",
 543                                                         dev->name);
 544                 } else if (devcs & ETH_TX_TOK) {
 545                         dev->stats.tx_packets++;
 546                         dev->stats.tx_bytes +=
 547                                         lp->tx_skb[lp->tx_next_done]->len;
 548                 } else {
 549                         dev->stats.tx_errors++;
 550                         dev->stats.tx_dropped++;
 551
 552                         /* Underflow */
 553                         if (devcs & ETH_TX_UND)
 554                                 dev->stats.tx_fifo_errors++;
 555
 556                         /* Oversized frame */
 557                         if (devcs & ETH_TX_OF)
 558                                 dev->stats.tx_aborted_errors++;
 559
 560                         /* Excessive deferrals */
 561                         if (devcs & ETH_TX_ED)
 562                                 dev->stats.tx_carrier_errors++;
 563
 564                         /* Collisions: medium busy */
 565                         if (devcs & ETH_TX_EC)
 566                                 dev->stats.collisions++;
 567
 568                         /* Late collision */
 569                         if (devcs & ETH_TX_LC)
 570                                 dev->stats.tx_window_errors++;
 571                 }
 572
 573                 /* We must always free the original skb */
 574                 if (lp->tx_skb[lp->tx_next_done]) {
 575                         dev_kfree_skb_any(lp->tx_skb[lp->tx_next_done]);
 576                         lp->tx_skb[lp->tx_next_done] = NULL;
 577                 }
 578
 579                 lp->td_ring[lp->tx_next_done].control = DMA_DESC_IOF;
 580                 lp->td_ring[lp->tx_next_done].devcs = ETH_TX_FD | ETH_TX_LD;
 581                 lp->td_ring[lp->tx_next_done].link = 0;
 582                 lp->td_ring[lp->tx_next_done].ca = 0;
 583                 lp->tx_count--;
 584
 585                 /* Go on to next transmission */
 586                 lp->tx_next_done = (lp->tx_next_done + 1) & KORINA_TDS_MASK;
 587                 td = &lp->td_ring[lp->tx_next_done];
 588
 589         }
 590
 591         /* Clear the DMA status register */
 592         dmas = readl(&lp->tx_dma_regs->dmas);
 593         writel(~dmas, &lp->tx_dma_regs->dmas);
 594
 595         writel(readl(&lp->tx_dma_regs->dmasm) &
 596                         ~(DMA_STAT_FINI | DMA_STAT_ERR),
 597                         &lp->tx_dma_regs->dmasm);
 598
 599         spin_unlock(&lp->lock);
 600 }
 601
 602 static irqreturn_t
 603 korina_tx_dma_interrupt(int irq, void *dev_id)
 604 {
 605         struct net_device *dev = dev_id;
 606         struct korina_private *lp = netdev_priv(dev);
 607         u32 dmas, dmasm;
 608         irqreturn_t retval;
 609
 610         dmas = readl(&lp->tx_dma_regs->dmas);
 611
 612         if (dmas & (DMA_STAT_FINI | DMA_STAT_ERR)) {
 613                 dmasm = readl(&lp->tx_dma_regs->dmasm);
 614                 writel(dmasm | (DMA_STAT_FINI | DMA_STAT_ERR),
 615                                 &lp->tx_dma_regs->dmasm);
 616
 617                 korina_tx(dev);
 618
 619                 if (lp->tx_chain_status == desc_filled &&
 620                         (readl(&(lp->tx_dma_regs->dmandptr)) == 0)) {
 621                         writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]),
 622                                 &(lp->tx_dma_regs->dmandptr));
 623                         lp->tx_chain_status = desc_empty;
 624                         lp->tx_chain_head = lp->tx_chain_tail;
 625                         netif_trans_update(dev);
 626                 }
 627                 if (dmas & DMA_STAT_ERR)
 628                         printk(KERN_ERR "%s: DMA error\n", dev->name);
 629
 630                 retval = IRQ_HANDLED;
 631         } else
 632                 retval = IRQ_NONE;
 633
 634         return retval;
 635 }
 636
 637
 638 static void korina_check_media(struct net_device *dev, unsigned int init_media)
 639 {
 640         struct korina_private *lp = netdev_priv(dev);
 641
 642         mii_check_media(&lp->mii_if, 0, init_media);
 643
 644         if (lp->mii_if.full_duplex)
 645                 writel(readl(&lp->eth_regs->ethmac2) | ETH_MAC2_FD,
 646                                                 &lp->eth_regs->ethmac2);
 647         else
 648                 writel(readl(&lp->eth_regs->ethmac2) & ~ETH_MAC2_FD,
 649                                                 &lp->eth_regs->ethmac2);
 650 }
 651
 652 static void korina_poll_media(unsigned long data)
 653 {
 654         struct net_device *dev = (struct net_device *) data;
 655         struct korina_private *lp = netdev_priv(dev);
 656
 657         korina_check_media(dev, 0);
 658         mod_timer(&lp->media_check_timer, jiffies + HZ);
 659 }
 660
 661 static void korina_set_carrier(struct mii_if_info *mii)
 662 {
 663         if (mii->force_media) {
 664                 /* autoneg is off: Link is always assumed to be up */
 665                 if (!netif_carrier_ok(mii->dev))
 666                         netif_carrier_on(mii->dev);
 667         } else  /* Let MMI library update carrier status */
 668                 korina_check_media(mii->dev, 0);
 669 }
 670
 671 static int korina_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 672 {
 673         struct korina_private *lp = netdev_priv(dev);
 674         struct mii_ioctl_data *data = if_mii(rq);
 675         int rc;
 676
 677         if (!netif_running(dev))
 678                 return -EINVAL;
 679         spin_lock_irq(&lp->lock);
 680         rc = generic_mii_ioctl(&lp->mii_if, data, cmd, NULL);
 681         spin_unlock_irq(&lp->lock);
 682         korina_set_carrier(&lp->mii_if);
 683
 684         return rc;
 685 }
 686
 687 /* ethtool helpers */
 688 static void netdev_get_drvinfo(struct net_device *dev,
 689                         struct ethtool_drvinfo *info)
 690 {
 691         struct korina_private *lp = netdev_priv(dev);
 692
 693         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 694         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 695         strlcpy(info->bus_info, lp->dev->name, sizeof(info->bus_info));
 696 }
 697
 698 static int netdev_get_link_ksettings(struct net_device *dev,
 699                                      struct ethtool_link_ksettings *cmd)
 700 {
 701         struct korina_private *lp = netdev_priv(dev);
 702         int rc;
 703
 704         spin_lock_irq(&lp->lock);
 705         rc = mii_ethtool_get_link_ksettings(&lp->mii_if, cmd);
 706         spin_unlock_irq(&lp->lock);
 707
 708         return rc;
 709 }
 710
 711 static int netdev_set_link_ksettings(struct net_device *dev,
 712                                      const struct ethtool_link_ksettings *cmd)
 713 {
 714         struct korina_private *lp = netdev_priv(dev);
 715         int rc;
 716
 717         spin_lock_irq(&lp->lock);
 718         rc = mii_ethtool_set_link_ksettings(&lp->mii_if, cmd);
 719         spin_unlock_irq(&lp->lock);
 720         korina_set_carrier(&lp->mii_if);
 721
 722         return rc;
 723 }
 724
 725 static u32 netdev_get_link(struct net_device *dev)
 726 {
 727         struct korina_private *lp = netdev_priv(dev);
 728
 729         return mii_link_ok(&lp->mii_if);
 730 }
 731
 732 static const struct ethtool_ops netdev_ethtool_ops = {
 733         .get_drvinfo            = netdev_get_drvinfo,
 734         .get_link               = netdev_get_link,
 735         .get_link_ksettings     = netdev_get_link_ksettings,
 736         .set_link_ksettings     = netdev_set_link_ksettings,
 737 };
 738
 739 static int korina_alloc_ring(struct net_device *dev)
 740 {
 741         struct korina_private *lp = netdev_priv(dev);
 742         struct sk_buff *skb;
 743         int i;
 744
 745         /* Initialize the transmit descriptors */
 746         for (i = 0; i < KORINA_NUM_TDS; i++) {
 747                 lp->td_ring[i].control = DMA_DESC_IOF;
 748                 lp->td_ring[i].devcs = ETH_TX_FD | ETH_TX_LD;
 749                 lp->td_ring[i].ca = 0;
 750                 lp->td_ring[i].link = 0;
 751         }
 752         lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail =
 753                         lp->tx_full = lp->tx_count = 0;
 754         lp->tx_chain_status = desc_empty;
 755
 756         /* Initialize the receive descriptors */
 757         for (i = 0; i < KORINA_NUM_RDS; i++) {
 758                 skb = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE);
 759                 if (!skb)
 760                         return -ENOMEM;
 761                 lp->rx_skb[i] = skb;
 762                 lp->rd_ring[i].control = DMA_DESC_IOD |
 763                                 DMA_COUNT(KORINA_RBSIZE);
 764                 lp->rd_ring[i].devcs = 0;
 765                 lp->rd_ring[i].ca = CPHYSADDR(skb->data);
 766                 lp->rd_ring[i].link = CPHYSADDR(&lp->rd_ring[i+1]);
 767         }
 768
 769         /* loop back receive descriptors, so the last
 770          * descriptor points to the first one */
 771         lp->rd_ring[i - 1].link = CPHYSADDR(&lp->rd_ring[0]);
 772         lp->rd_ring[i - 1].control |= DMA_DESC_COD;
 773
 774         lp->rx_next_done  = 0;
 775         lp->rx_chain_head = 0;
 776         lp->rx_chain_tail = 0;
 777         lp->rx_chain_status = desc_empty;
 778
 779         return 0;
 780 }
 781
 782 static void korina_free_ring(struct net_device *dev)
 783 {
 784         struct korina_private *lp = netdev_priv(dev);
 785         int i;
 786
 787         for (i = 0; i < KORINA_NUM_RDS; i++) {
 788                 lp->rd_ring[i].control = 0;
 789                 if (lp->rx_skb[i])
 790                         dev_kfree_skb_any(lp->rx_skb[i]);
 791                 lp->rx_skb[i] = NULL;
 792         }
 793
 794         for (i = 0; i < KORINA_NUM_TDS; i++) {
 795                 lp->td_ring[i].control = 0;
 796                 if (lp->tx_skb[i])
 797                         dev_kfree_skb_any(lp->tx_skb[i]);
 798                 lp->tx_skb[i] = NULL;
 799         }
 800 }
 801
 802 /*
 803  * Initialize the RC32434 ethernet controller.
 804  */
 805 static int korina_init(struct net_device *dev)
 806 {
 807         struct korina_private *lp = netdev_priv(dev);
 808
 809         /* Disable DMA */
 810         korina_abort_tx(dev);
 811         korina_abort_rx(dev);
 812
 813         /* reset ethernet logic */
 814         writel(0, &lp->eth_regs->ethintfc);
 815         while ((readl(&lp->eth_regs->ethintfc) & ETH_INT_FC_RIP))
 816                 netif_trans_update(dev);
 817
 818         /* Enable Ethernet Interface */
 819         writel(ETH_INT_FC_EN, &lp->eth_regs->ethintfc);
 820
 821         /* Allocate rings */
 822         if (korina_alloc_ring(dev)) {
 823                 printk(KERN_ERR "%s: descriptor allocation failed\n", dev->name);
 824                 korina_free_ring(dev);
 825                 return -ENOMEM;
 826         }
 827
 828         writel(0, &lp->rx_dma_regs->dmas);
 829         /* Start Rx DMA */
 830         korina_start_rx(lp, &lp->rd_ring[0]);
 831
 832         writel(readl(&lp->tx_dma_regs->dmasm) &
 833                         ~(DMA_STAT_FINI | DMA_STAT_ERR),
 834                         &lp->tx_dma_regs->dmasm);
 835         writel(readl(&lp->rx_dma_regs->dmasm) &
 836                         ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR),
 837                         &lp->rx_dma_regs->dmasm);
 838
 839         /* Accept only packets destined for this Ethernet device address */
 840         writel(ETH_ARC_AB, &lp->eth_regs->etharc);
 841
 842         /* Set all Ether station address registers to their initial values */
 843         writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal0);
 844         writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah0);
 845
 846         writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal1);
 847         writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah1);
 848
 849         writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal2);
 850         writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah2);
 851
 852         writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal3);
 853         writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah3);
 854
 855
 856         /* Frame Length Checking, Pad Enable, CRC Enable, Full Duplex set */
 857         writel(ETH_MAC2_PE | ETH_MAC2_CEN | ETH_MAC2_FD,
 858                         &lp->eth_regs->ethmac2);
 859
 860         /* Back to back inter-packet-gap */
 861         writel(0x15, &lp->eth_regs->ethipgt);
 862         /* Non - Back to back inter-packet-gap */
 863         writel(0x12, &lp->eth_regs->ethipgr);
 864
 865         /* Management Clock Prescaler Divisor
 866          * Clock independent setting */
 867         writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1,
 868                        &lp->eth_regs->ethmcp);
 869
 870         /* don't transmit until fifo contains 48b */
 871         writel(48, &lp->eth_regs->ethfifott);
 872
 873         writel(ETH_MAC1_RE, &lp->eth_regs->ethmac1);
 874
 875         napi_enable(&lp->napi);
 876         netif_start_queue(dev);
 877
 878         return 0;
 879 }
 880
 881 /*
 882  * Restart the RC32434 ethernet controller.
 883  */
 884 static void korina_restart_task(struct work_struct *work)
 885 {
 886         struct korina_private *lp = container_of(work,
 887                         struct korina_private, restart_task);
 888         struct net_device *dev = lp->dev;
 889
 890         /*
 891          * Disable interrupts
 892          */
 893         disable_irq(lp->rx_irq);
 894         disable_irq(lp->tx_irq);
 895         disable_irq(lp->ovr_irq);
 896         disable_irq(lp->und_irq);
 897
 898         writel(readl(&lp->tx_dma_regs->dmasm) |
 899                                 DMA_STAT_FINI | DMA_STAT_ERR,
 900                                 &lp->tx_dma_regs->dmasm);
 901         writel(readl(&lp->rx_dma_regs->dmasm) |
 902                                 DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR,
 903                                 &lp->rx_dma_regs->dmasm);
 904
 905         napi_disable(&lp->napi);
 906
 907         korina_free_ring(dev);
 908
 909         if (korina_init(dev) < 0) {
 910                 printk(KERN_ERR "%s: cannot restart device\n", dev->name);
 911                 return;
 912         }
 913         korina_multicast_list(dev);
 914
 915         enable_irq(lp->und_irq);
 916         enable_irq(lp->ovr_irq);
 917         enable_irq(lp->tx_irq);
 918         enable_irq(lp->rx_irq);
 919 }
 920
 921 static void korina_clear_and_restart(struct net_device *dev, u32 value)
 922 {
 923         struct korina_private *lp = netdev_priv(dev);
 924
 925         netif_stop_queue(dev);
 926         writel(value, &lp->eth_regs->ethintfc);
 927         schedule_work(&lp->restart_task);
 928 }
 929
 930 /* Ethernet Tx Underflow interrupt */
 931 static irqreturn_t korina_und_interrupt(int irq, void *dev_id)
 932 {
 933         struct net_device *dev = dev_id;
 934         struct korina_private *lp = netdev_priv(dev);
 935         unsigned int und;
 936
 937         spin_lock(&lp->lock);
 938
 939         und = readl(&lp->eth_regs->ethintfc);
 940
 941         if (und & ETH_INT_FC_UND)
 942                 korina_clear_and_restart(dev, und & ~ETH_INT_FC_UND);
 943
 944         spin_unlock(&lp->lock);
 945
 946         return IRQ_HANDLED;
 947 }
 948
 949 static void korina_tx_timeout(struct net_device *dev)
 950 {
 951         struct korina_private *lp = netdev_priv(dev);
 952
 953         schedule_work(&lp->restart_task);
 954 }
 955
 956 /* Ethernet Rx Overflow interrupt */
 957 static irqreturn_t
 958 korina_ovr_interrupt(int irq, void *dev_id)
 959 {
 960         struct net_device *dev = dev_id;
 961         struct korina_private *lp = netdev_priv(dev);
 962         unsigned int ovr;
 963
 964         spin_lock(&lp->lock);
 965         ovr = readl(&lp->eth_regs->ethintfc);
 966
 967         if (ovr & ETH_INT_FC_OVR)
 968                 korina_clear_and_restart(dev, ovr & ~ETH_INT_FC_OVR);
 969
 970         spin_unlock(&lp->lock);
 971
 972         return IRQ_HANDLED;
 973 }
 974
 975 #ifdef CONFIG_NET_POLL_CONTROLLER
 976 static void korina_poll_controller(struct net_device *dev)
 977 {
 978         disable_irq(dev->irq);
 979         korina_tx_dma_interrupt(dev->irq, dev);
 980         enable_irq(dev->irq);
 981 }
 982 #endif
 983
 984 static int korina_open(struct net_device *dev)
 985 {
 986         struct korina_private *lp = netdev_priv(dev);
 987         int ret;
 988
 989         /* Initialize */
 990         ret = korina_init(dev);
 991         if (ret < 0) {
 992                 printk(KERN_ERR "%s: cannot open device\n", dev->name);
 993                 goto out;
 994         }
 995
 996         /* Install the interrupt handler
 997          * that handles the Done Finished
 998          * Ovr and Und Events */
 999         ret = request_irq(lp->rx_irq, korina_rx_dma_interrupt,
1000                         0, "Korina ethernet Rx", dev);
1001         if (ret < 0) {
1002                 printk(KERN_ERR "%s: unable to get Rx DMA IRQ %d\n",
1003                     dev->name, lp->rx_irq);
1004                 goto err_release;
1005         }
1006         ret = request_irq(lp->tx_irq, korina_tx_dma_interrupt,
1007                         0, "Korina ethernet Tx", dev);
1008         if (ret < 0) {
1009                 printk(KERN_ERR "%s: unable to get Tx DMA IRQ %d\n",
1010                     dev->name, lp->tx_irq);
1011                 goto err_free_rx_irq;
1012         }
1013
1014         /* Install handler for overrun error. */
1015         ret = request_irq(lp->ovr_irq, korina_ovr_interrupt,
1016                         0, "Ethernet Overflow", dev);
1017         if (ret < 0) {
1018                 printk(KERN_ERR "%s: unable to get OVR IRQ %d\n",
1019                     dev->name, lp->ovr_irq);
1020                 goto err_free_tx_irq;
1021         }
1022
1023         /* Install handler for underflow error. */
1024         ret = request_irq(lp->und_irq, korina_und_interrupt,
1025                         0, "Ethernet Underflow", dev);
1026         if (ret < 0) {
1027                 printk(KERN_ERR "%s: unable to get UND IRQ %d\n",
1028                     dev->name, lp->und_irq);
1029                 goto err_free_ovr_irq;
1030         }
1031         mod_timer(&lp->media_check_timer, jiffies + 1);
1032 out:
1033         return ret;
1034
1035 err_free_ovr_irq:
1036         free_irq(lp->ovr_irq, dev);
1037 err_free_tx_irq:
1038         free_irq(lp->tx_irq, dev);
1039 err_free_rx_irq:
1040         free_irq(lp->rx_irq, dev);
1041 err_release:
1042         korina_free_ring(dev);
1043         goto out;
1044 }
1045
1046 static int korina_close(struct net_device *dev)
1047 {
1048         struct korina_private *lp = netdev_priv(dev);
1049         u32 tmp;
1050
1051         del_timer(&lp->media_check_timer);
1052
1053         /* Disable interrupts */
1054         disable_irq(lp->rx_irq);
1055         disable_irq(lp->tx_irq);
1056         disable_irq(lp->ovr_irq);
1057         disable_irq(lp->und_irq);
1058
1059         korina_abort_tx(dev);
1060         tmp = readl(&lp->tx_dma_regs->dmasm);
1061         tmp = tmp | DMA_STAT_FINI | DMA_STAT_ERR;
1062         writel(tmp, &lp->tx_dma_regs->dmasm);
1063
1064         korina_abort_rx(dev);
1065         tmp = readl(&lp->rx_dma_regs->dmasm);
1066         tmp = tmp | DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR;
1067         writel(tmp, &lp->rx_dma_regs->dmasm);
1068
1069         napi_disable(&lp->napi);
1070
1071         cancel_work_sync(&lp->restart_task);
1072
1073         korina_free_ring(dev);
1074
1075         free_irq(lp->rx_irq, dev);
1076         free_irq(lp->tx_irq, dev);
1077         free_irq(lp->ovr_irq, dev);
1078         free_irq(lp->und_irq, dev);
1079
1080         return 0;
1081 }
1082
1083 static const struct net_device_ops korina_netdev_ops = {
1084         .ndo_open               = korina_open,
1085         .ndo_stop               = korina_close,
1086         .ndo_start_xmit         = korina_send_packet,
1087         .ndo_set_rx_mode        = korina_multicast_list,
1088         .ndo_tx_timeout         = korina_tx_timeout,
1089         .ndo_do_ioctl           = korina_ioctl,
1090         .ndo_validate_addr      = eth_validate_addr,
1091         .ndo_set_mac_address    = eth_mac_addr,
1092 #ifdef CONFIG_NET_POLL_CONTROLLER
1093         .ndo_poll_controller    = korina_poll_controller,
1094 #endif
1095 };
1096
1097 static int korina_probe(struct platform_device *pdev)
1098 {
1099         struct korina_device *bif = platform_get_drvdata(pdev);
1100         struct korina_private *lp;
1101         struct net_device *dev;
1102         struct resource *r;
1103         int rc;
1104
1105         dev = alloc_etherdev(sizeof(struct korina_private));
1106         if (!dev)
1107                 return -ENOMEM;
1108
1109         SET_NETDEV_DEV(dev, &pdev->dev);
1110         lp = netdev_priv(dev);
1111
1112         bif->dev = dev;
1113         memcpy(dev->dev_addr, bif->mac, ETH_ALEN);
1114
1115         lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");
1116         lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
1117         lp->ovr_irq = platform_get_irq_byname(pdev, "korina_ovr");
1118         lp->und_irq = platform_get_irq_byname(pdev, "korina_und");
1119
1120         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs");
1121         dev->base_addr = r->start;
1122         lp->eth_regs = ioremap_nocache(r->start, resource_size(r));
1123         if (!lp->eth_regs) {
1124                 printk(KERN_ERR DRV_NAME ": cannot remap registers\n");
1125                 rc = -ENXIO;
1126                 goto probe_err_out;
1127         }
1128
1129         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx");
1130         lp->rx_dma_regs = ioremap_nocache(r->start, resource_size(r));
1131         if (!lp->rx_dma_regs) {
1132                 printk(KERN_ERR DRV_NAME ": cannot remap Rx DMA registers\n");
1133                 rc = -ENXIO;
1134                 goto probe_err_dma_rx;
1135         }
1136
1137         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx");
1138         lp->tx_dma_regs = ioremap_nocache(r->start, resource_size(r));
1139         if (!lp->tx_dma_regs) {
1140                 printk(KERN_ERR DRV_NAME ": cannot remap Tx DMA registers\n");
1141                 rc = -ENXIO;
1142                 goto probe_err_dma_tx;
1143         }
1144
1145         lp->td_ring = kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL);
1146         if (!lp->td_ring) {
1147                 rc = -ENXIO;
1148                 goto probe_err_td_ring;
1149         }
1150
1151         dma_cache_inv((unsigned long)(lp->td_ring),
1152                         TD_RING_SIZE + RD_RING_SIZE);
1153
1154         /* now convert TD_RING pointer to KSEG1 */
1155         lp->td_ring = (struct dma_desc *)KSEG1ADDR(lp->td_ring);
1156         lp->rd_ring = &lp->td_ring[KORINA_NUM_TDS];
1157
1158         spin_lock_init(&lp->lock);
1159         /* just use the rx dma irq */
1160         dev->irq = lp->rx_irq;
1161         lp->dev = dev;
1162
1163         dev->netdev_ops = &korina_netdev_ops;
1164         dev->ethtool_ops = &netdev_ethtool_ops;
1165         dev->watchdog_timeo = TX_TIMEOUT;
1166         netif_napi_add(dev, &lp->napi, korina_poll, 64);
1167
1168         lp->phy_addr = (((lp->rx_irq == 0x2c? 1:0) << 8) | 0x05);
1169         lp->mii_if.dev = dev;
1170         lp->mii_if.mdio_read = mdio_read;
1171         lp->mii_if.mdio_write = mdio_write;
1172         lp->mii_if.phy_id = lp->phy_addr;
1173         lp->mii_if.phy_id_mask = 0x1f;
1174         lp->mii_if.reg_num_mask = 0x1f;
1175
1176         rc = register_netdev(dev);
1177         if (rc < 0) {
1178                 printk(KERN_ERR DRV_NAME
1179                         ": cannot register net device: %d\n", rc);
1180                 goto probe_err_register;
1181         }
1182         setup_timer(&lp->media_check_timer, korina_poll_media, (unsigned long) dev);
1183
1184         INIT_WORK(&lp->restart_task, korina_restart_task);
1185
1186         printk(KERN_INFO "%s: " DRV_NAME "-" DRV_VERSION " " DRV_RELDATE "\n",
1187                         dev->name);
1188 out:
1189         return rc;
1190
1191 probe_err_register:
1192         kfree(lp->td_ring);
1193 probe_err_td_ring:
1194         iounmap(lp->tx_dma_regs);
1195 probe_err_dma_tx:
1196         iounmap(lp->rx_dma_regs);
1197 probe_err_dma_rx:
1198         iounmap(lp->eth_regs);
1199 probe_err_out:
1200         free_netdev(dev);
1201         goto out;
1202 }
1203
1204 static int korina_remove(struct platform_device *pdev)
1205 {
1206         struct korina_device *bif = platform_get_drvdata(pdev);
1207         struct korina_private *lp = netdev_priv(bif->dev);
1208
1209         iounmap(lp->eth_regs);
1210         iounmap(lp->rx_dma_regs);
1211         iounmap(lp->tx_dma_regs);
1212
1213         unregister_netdev(bif->dev);
1214         free_netdev(bif->dev);
1215
1216         return 0;
1217 }
1218
1219 static struct platform_driver korina_driver = {
1220         .driver.name = "korina",
1221         .probe = korina_probe,
1222         .remove = korina_remove,
1223 };
1224
1225 module_platform_driver(korina_driver);
1226
1227 MODULE_AUTHOR("Philip Rischel <rischelp@idt.com>");
1228 MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
1229 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
1230 MODULE_DESCRIPTION("IDT RC32434 (Korina) Ethernet driver");
1231 MODULE_LICENSE("GPL");