LXR linux/drivers/net/ethernet/rdc/r6040.c

   1/*
   2 * RDC R6040 Fast Ethernet MAC support
   3 *
   4 * Copyright (C) 2004 Sten Wang <sten.wang@rdc.com.tw>
   5 * Copyright (C) 2007
   6 *      Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
   7 * Copyright (C) 2007-2012 Florian Fainelli <f.fainelli@gmail.com>
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License
  11 * as published by the Free Software Foundation; either version 2
  12 * of the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the
  21 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22 * Boston, MA  02110-1301, USA.
  23*/
  24
  25#include <linux/kernel.h>
  26#include <linux/module.h>
  27#include <linux/moduleparam.h>
  28#include <linux/string.h>
  29#include <linux/timer.h>
  30#include <linux/errno.h>
  31#include <linux/ioport.h>
  32#include <linux/interrupt.h>
  33#include <linux/pci.h>
  34#include <linux/netdevice.h>
  35#include <linux/etherdevice.h>
  36#include <linux/skbuff.h>
  37#include <linux/delay.h>
  38#include <linux/mii.h>
  39#include <linux/ethtool.h>
  40#include <linux/crc32.h>
  41#include <linux/spinlock.h>
  42#include <linux/bitops.h>
  43#include <linux/io.h>
  44#include <linux/irq.h>
  45#include <linux/uaccess.h>
  46#include <linux/phy.h>
  47
  48#include <asm/processor.h>
  49
  50#define DRV_NAME        "r6040"
  51#define DRV_VERSION     "0.29"
  52#define DRV_RELDATE     "04Jul2016"
  53
  54/* Time in jiffies before concluding the transmitter is hung. */
  55#define TX_TIMEOUT      (6000 * HZ / 1000)
  56
  57/* RDC MAC I/O Size */
  58#define R6040_IO_SIZE   256
  59
  60/* MAX RDC MAC */
  61#define MAX_MAC         2
  62
  63/* MAC registers */
  64#define MCR0            0x00    /* Control register 0 */
  65#define  MCR0_RCVEN     0x0002  /* Receive enable */
  66#define  MCR0_PROMISC   0x0020  /* Promiscuous mode */
  67#define  MCR0_HASH_EN   0x0100  /* Enable multicast hash table function */
  68#define  MCR0_XMTEN     0x1000  /* Transmission enable */
  69#define  MCR0_FD        0x8000  /* Full/Half duplex */
  70#define MCR1            0x04    /* Control register 1 */
  71#define  MAC_RST        0x0001  /* Reset the MAC */
  72#define MBCR            0x08    /* Bus control */
  73#define MT_ICR          0x0C    /* TX interrupt control */
  74#define MR_ICR          0x10    /* RX interrupt control */
  75#define MTPR            0x14    /* TX poll command register */
  76#define  TM2TX          0x0001  /* Trigger MAC to transmit */
  77#define MR_BSR          0x18    /* RX buffer size */
  78#define MR_DCR          0x1A    /* RX descriptor control */
  79#define MLSR            0x1C    /* Last status */
  80#define  TX_FIFO_UNDR   0x0200  /* TX FIFO under-run */
  81#define  TX_EXCEEDC     0x2000  /* Transmit exceed collision */
  82#define  TX_LATEC       0x4000  /* Transmit late collision */
  83#define MMDIO           0x20    /* MDIO control register */
  84#define  MDIO_WRITE     0x4000  /* MDIO write */
  85#define  MDIO_READ      0x2000  /* MDIO read */
  86#define MMRD            0x24    /* MDIO read data register */
  87#define MMWD            0x28    /* MDIO write data register */
  88#define MTD_SA0         0x2C    /* TX descriptor start address 0 */
  89#define MTD_SA1         0x30    /* TX descriptor start address 1 */
  90#define MRD_SA0         0x34    /* RX descriptor start address 0 */
  91#define MRD_SA1         0x38    /* RX descriptor start address 1 */
  92#define MISR            0x3C    /* Status register */
  93#define MIER            0x40    /* INT enable register */
  94#define  MSK_INT        0x0000  /* Mask off interrupts */
  95#define  RX_FINISH      0x0001  /* RX finished */
  96#define  RX_NO_DESC     0x0002  /* No RX descriptor available */
  97#define  RX_FIFO_FULL   0x0004  /* RX FIFO full */
  98#define  RX_EARLY       0x0008  /* RX early */
  99#define  TX_FINISH      0x0010  /* TX finished */
 100#define  TX_EARLY       0x0080  /* TX early */
 101#define  EVENT_OVRFL    0x0100  /* Event counter overflow */
 102#define  LINK_CHANGED   0x0200  /* PHY link changed */
 103#define ME_CISR         0x44    /* Event counter INT status */
 104#define ME_CIER         0x48    /* Event counter INT enable  */
 105#define MR_CNT          0x50    /* Successfully received packet counter */
 106#define ME_CNT0         0x52    /* Event counter 0 */
 107#define ME_CNT1         0x54    /* Event counter 1 */
 108#define ME_CNT2         0x56    /* Event counter 2 */
 109#define ME_CNT3         0x58    /* Event counter 3 */
 110#define MT_CNT          0x5A    /* Successfully transmit packet counter */
 111#define ME_CNT4         0x5C    /* Event counter 4 */
 112#define MP_CNT          0x5E    /* Pause frame counter register */
 113#define MAR0            0x60    /* Hash table 0 */
 114#define MAR1            0x62    /* Hash table 1 */
 115#define MAR2            0x64    /* Hash table 2 */
 116#define MAR3            0x66    /* Hash table 3 */
 117#define MID_0L          0x68    /* Multicast address MID0 Low */
 118#define MID_0M          0x6A    /* Multicast address MID0 Medium */
 119#define MID_0H          0x6C    /* Multicast address MID0 High */
 120#define MID_1L          0x70    /* MID1 Low */
 121#define MID_1M          0x72    /* MID1 Medium */
 122#define MID_1H          0x74    /* MID1 High */
 123#define MID_2L          0x78    /* MID2 Low */
 124#define MID_2M          0x7A    /* MID2 Medium */
 125#define MID_2H          0x7C    /* MID2 High */
 126#define MID_3L          0x80    /* MID3 Low */
 127#define MID_3M          0x82    /* MID3 Medium */
 128#define MID_3H          0x84    /* MID3 High */
 129#define PHY_CC          0x88    /* PHY status change configuration register */
 130#define  SCEN           0x8000  /* PHY status change enable */
 131#define  PHYAD_SHIFT    8       /* PHY address shift */
 132#define  TMRDIV_SHIFT   0       /* Timer divider shift */
 133#define PHY_ST          0x8A    /* PHY status register */
 134#define MAC_SM          0xAC    /* MAC status machine */
 135#define  MAC_SM_RST     0x0002  /* MAC status machine reset */
 136#define MAC_ID          0xBE    /* Identifier register */
 137
 138#define TX_DCNT         0x80    /* TX descriptor count */
 139#define RX_DCNT         0x80    /* RX descriptor count */
 140#define MAX_BUF_SIZE    0x600
 141#define RX_DESC_SIZE    (RX_DCNT * sizeof(struct r6040_descriptor))
 142#define TX_DESC_SIZE    (TX_DCNT * sizeof(struct r6040_descriptor))
 143#define MBCR_DEFAULT    0x012A  /* MAC Bus Control Register */
 144#define MCAST_MAX       3       /* Max number multicast addresses to filter */
 145
 146#define MAC_DEF_TIMEOUT 2048    /* Default MAC read/write operation timeout */
 147
 148/* Descriptor status */
 149#define DSC_OWNER_MAC   0x8000  /* MAC is the owner of this descriptor */
 150#define DSC_RX_OK       0x4000  /* RX was successful */
 151#define DSC_RX_ERR      0x0800  /* RX PHY error */
 152#define DSC_RX_ERR_DRI  0x0400  /* RX dribble packet */
 153#define DSC_RX_ERR_BUF  0x0200  /* RX length exceeds buffer size */
 154#define DSC_RX_ERR_LONG 0x0100  /* RX length > maximum packet length */
 155#define DSC_RX_ERR_RUNT 0x0080  /* RX packet length < 64 byte */
 156#define DSC_RX_ERR_CRC  0x0040  /* RX CRC error */
 157#define DSC_RX_BCAST    0x0020  /* RX broadcast (no error) */
 158#define DSC_RX_MCAST    0x0010  /* RX multicast (no error) */
 159#define DSC_RX_MCH_HIT  0x0008  /* RX multicast hit in hash table (no error) */
 160#define DSC_RX_MIDH_HIT 0x0004  /* RX MID table hit (no error) */
 161#define DSC_RX_IDX_MID_MASK 3   /* RX mask for the index of matched MIDx */
 162
 163MODULE_AUTHOR("Sten Wang <sten.wang@rdc.com.tw>,"
 164        "Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>,"
 165        "Florian Fainelli <f.fainelli@gmail.com>");
 166MODULE_LICENSE("GPL");
 167MODULE_DESCRIPTION("RDC R6040 NAPI PCI FastEthernet driver");
 168MODULE_VERSION(DRV_VERSION " " DRV_RELDATE);
 169
 170/* RX and TX interrupts that we handle */
 171#define RX_INTS                 (RX_FIFO_FULL | RX_NO_DESC | RX_FINISH)
 172#define TX_INTS                 (TX_FINISH)
 173#define INT_MASK                (RX_INTS | TX_INTS)
 174
 175struct r6040_descriptor {
 176        u16     status, len;            /* 0-3 */
 177        __le32  buf;                    /* 4-7 */
 178        __le32  ndesc;                  /* 8-B */
 179        u32     rev1;                   /* C-F */
 180        char    *vbufp;                 /* 10-13 */
 181        struct r6040_descriptor *vndescp;       /* 14-17 */
 182        struct sk_buff *skb_ptr;        /* 18-1B */
 183        u32     rev2;                   /* 1C-1F */
 184} __aligned(32);
 185
 186struct r6040_private {
 187        spinlock_t lock;                /* driver lock */
 188        struct pci_dev *pdev;
 189        struct r6040_descriptor *rx_insert_ptr;
 190        struct r6040_descriptor *rx_remove_ptr;
 191        struct r6040_descriptor *tx_insert_ptr;
 192        struct r6040_descriptor *tx_remove_ptr;
 193        struct r6040_descriptor *rx_ring;
 194        struct r6040_descriptor *tx_ring;
 195        dma_addr_t rx_ring_dma;
 196        dma_addr_t tx_ring_dma;
 197        u16     tx_free_desc;
 198        u16     mcr0;
 199        struct net_device *dev;
 200        struct mii_bus *mii_bus;
 201        struct napi_struct napi;
 202        void __iomem *base;
 203        int old_link;
 204        int old_duplex;
 205};
 206
 207static char version[] = DRV_NAME
 208        ": RDC R6040 NAPI net driver,"
 209        "version "DRV_VERSION " (" DRV_RELDATE ")";
 210
 211/* Read a word data from PHY Chip */
 212static int r6040_phy_read(void __iomem *ioaddr, int phy_addr, int reg)
 213{
 214        int limit = MAC_DEF_TIMEOUT;
 215        u16 cmd;
 216
 217        iowrite16(MDIO_READ + reg + (phy_addr << 8), ioaddr + MMDIO);
 218        /* Wait for the read bit to be cleared */
 219        while (limit--) {
 220                cmd = ioread16(ioaddr + MMDIO);
 221                if (!(cmd & MDIO_READ))
 222                        break;
 223                udelay(1);
 224        }
 225
 226        if (limit < 0)
 227                return -ETIMEDOUT;
 228
 229        return ioread16(ioaddr + MMRD);
 230}
 231
 232/* Write a word data from PHY Chip */
 233static int r6040_phy_write(void __iomem *ioaddr,
 234                                        int phy_addr, int reg, u16 val)
 235{
 236        int limit = MAC_DEF_TIMEOUT;
 237        u16 cmd;
 238
 239        iowrite16(val, ioaddr + MMWD);
 240        /* Write the command to the MDIO bus */
 241        iowrite16(MDIO_WRITE + reg + (phy_addr << 8), ioaddr + MMDIO);
 242        /* Wait for the write bit to be cleared */
 243        while (limit--) {
 244                cmd = ioread16(ioaddr + MMDIO);
 245                if (!(cmd & MDIO_WRITE))
 246                        break;
 247                udelay(1);
 248        }
 249
 250        return (limit < 0) ? -ETIMEDOUT : 0;
 251}
 252
 253static int r6040_mdiobus_read(struct mii_bus *bus, int phy_addr, int reg)
 254{
 255        struct net_device *dev = bus->priv;
 256        struct r6040_private *lp = netdev_priv(dev);
 257        void __iomem *ioaddr = lp->base;
 258
 259        return r6040_phy_read(ioaddr, phy_addr, reg);
 260}
 261
 262static int r6040_mdiobus_write(struct mii_bus *bus, int phy_addr,
 263                                                int reg, u16 value)
 264{
 265        struct net_device *dev = bus->priv;
 266        struct r6040_private *lp = netdev_priv(dev);
 267        void __iomem *ioaddr = lp->base;
 268
 269        return r6040_phy_write(ioaddr, phy_addr, reg, value);
 270}
 271
 272static void r6040_free_txbufs(struct net_device *dev)
 273{
 274        struct r6040_private *lp = netdev_priv(dev);
 275        int i;
 276
 277        for (i = 0; i < TX_DCNT; i++) {
 278                if (lp->tx_insert_ptr->skb_ptr) {
 279                        pci_unmap_single(lp->pdev,
 280                                le32_to_cpu(lp->tx_insert_ptr->buf),
 281                                MAX_BUF_SIZE, PCI_DMA_TODEVICE);
 282                        dev_kfree_skb(lp->tx_insert_ptr->skb_ptr);
 283                        lp->tx_insert_ptr->skb_ptr = NULL;
 284                }
 285                lp->tx_insert_ptr = lp->tx_insert_ptr->vndescp;
 286        }
 287}
 288
 289static void r6040_free_rxbufs(struct net_device *dev)
 290{
 291        struct r6040_private *lp = netdev_priv(dev);
 292        int i;
 293
 294        for (i = 0; i < RX_DCNT; i++) {
 295                if (lp->rx_insert_ptr->skb_ptr) {
 296                        pci_unmap_single(lp->pdev,
 297                                le32_to_cpu(lp->rx_insert_ptr->buf),
 298                                MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
 299                        dev_kfree_skb(lp->rx_insert_ptr->skb_ptr);
 300                        lp->rx_insert_ptr->skb_ptr = NULL;
 301                }
 302                lp->rx_insert_ptr = lp->rx_insert_ptr->vndescp;
 303        }
 304}
 305
 306static void r6040_init_ring_desc(struct r6040_descriptor *desc_ring,
 307                                 dma_addr_t desc_dma, int size)
 308{
 309        struct r6040_descriptor *desc = desc_ring;
 310        dma_addr_t mapping = desc_dma;
 311
 312        while (size-- > 0) {
 313                mapping += sizeof(*desc);
 314                desc->ndesc = cpu_to_le32(mapping);
 315                desc->vndescp = desc + 1;
 316                desc++;
 317        }
 318        desc--;
 319        desc->ndesc = cpu_to_le32(desc_dma);
 320        desc->vndescp = desc_ring;
 321}
 322
 323static void r6040_init_txbufs(struct net_device *dev)
 324{
 325        struct r6040_private *lp = netdev_priv(dev);
 326
 327        lp->tx_free_desc = TX_DCNT;
 328
 329        lp->tx_remove_ptr = lp->tx_insert_ptr = lp->tx_ring;
 330        r6040_init_ring_desc(lp->tx_ring, lp->tx_ring_dma, TX_DCNT);
 331}
 332
 333static int r6040_alloc_rxbufs(struct net_device *dev)
 334{
 335        struct r6040_private *lp = netdev_priv(dev);
 336        struct r6040_descriptor *desc;
 337        struct sk_buff *skb;
 338        int rc;
 339
 340        lp->rx_remove_ptr = lp->rx_insert_ptr = lp->rx_ring;
 341        r6040_init_ring_desc(lp->rx_ring, lp->rx_ring_dma, RX_DCNT);
 342
 343        /* Allocate skbs for the rx descriptors */
 344        desc = lp->rx_ring;
 345        do {
 346                skb = netdev_alloc_skb(dev, MAX_BUF_SIZE);
 347                if (!skb) {
 348                        rc = -ENOMEM;
 349                        goto err_exit;
 350                }
 351                desc->skb_ptr = skb;
 352                desc->buf = cpu_to_le32(pci_map_single(lp->pdev,
 353                                        desc->skb_ptr->data,
 354                                        MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
 355                desc->status = DSC_OWNER_MAC;
 356                desc = desc->vndescp;
 357        } while (desc != lp->rx_ring);
 358
 359        return 0;
 360
 361err_exit:
 362        /* Deallocate all previously allocated skbs */
 363        r6040_free_rxbufs(dev);
 364        return rc;
 365}
 366
 367static void r6040_reset_mac(struct r6040_private *lp)
 368{
 369        void __iomem *ioaddr = lp->base;
 370        int limit = MAC_DEF_TIMEOUT;
 371        u16 cmd;
 372
 373        iowrite16(MAC_RST, ioaddr + MCR1);
 374        while (limit--) {
 375                cmd = ioread16(ioaddr + MCR1);
 376                if (cmd & MAC_RST)
 377                        break;
 378        }
 379
 380        /* Reset internal state machine */
 381        iowrite16(MAC_SM_RST, ioaddr + MAC_SM);
 382        iowrite16(0, ioaddr + MAC_SM);
 383        mdelay(5);
 384}
 385
 386static void r6040_init_mac_regs(struct net_device *dev)
 387{
 388        struct r6040_private *lp = netdev_priv(dev);
 389        void __iomem *ioaddr = lp->base;
 390
 391        /* Mask Off Interrupt */
 392        iowrite16(MSK_INT, ioaddr + MIER);
 393
 394        /* Reset RDC MAC */
 395        r6040_reset_mac(lp);
 396
 397        /* MAC Bus Control Register */
 398        iowrite16(MBCR_DEFAULT, ioaddr + MBCR);
 399
 400        /* Buffer Size Register */
 401        iowrite16(MAX_BUF_SIZE, ioaddr + MR_BSR);
 402
 403        /* Write TX ring start address */
 404        iowrite16(lp->tx_ring_dma, ioaddr + MTD_SA0);
 405        iowrite16(lp->tx_ring_dma >> 16, ioaddr + MTD_SA1);
 406
 407        /* Write RX ring start address */
 408        iowrite16(lp->rx_ring_dma, ioaddr + MRD_SA0);
 409        iowrite16(lp->rx_ring_dma >> 16, ioaddr + MRD_SA1);
 410
 411        /* Set interrupt waiting time and packet numbers */
 412        iowrite16(0, ioaddr + MT_ICR);
 413        iowrite16(0, ioaddr + MR_ICR);
 414
 415        /* Enable interrupts */
 416        iowrite16(INT_MASK, ioaddr + MIER);
 417
 418        /* Enable TX and RX */
 419        iowrite16(lp->mcr0 | MCR0_RCVEN, ioaddr);
 420
 421        /* Let TX poll the descriptors
 422         * we may got called by r6040_tx_timeout which has left
 423         * some unsent tx buffers */
 424        iowrite16(TM2TX, ioaddr + MTPR);
 425}
 426
 427static void r6040_tx_timeout(struct net_device *dev)
 428{
 429        struct r6040_private *priv = netdev_priv(dev);
 430        void __iomem *ioaddr = priv->base;
 431
 432        netdev_warn(dev, "transmit timed out, int enable %4.4x "
 433                "status %4.4x\n",
 434                ioread16(ioaddr + MIER),
 435                ioread16(ioaddr + MISR));
 436
 437        dev->stats.tx_errors++;
 438
 439        /* Reset MAC and re-init all registers */
 440        r6040_init_mac_regs(dev);
 441}
 442
 443static struct net_device_stats *r6040_get_stats(struct net_device *dev)
 444{
 445        struct r6040_private *priv = netdev_priv(dev);
 446        void __iomem *ioaddr = priv->base;
 447        unsigned long flags;
 448
 449        spin_lock_irqsave(&priv->lock, flags);
 450        dev->stats.rx_crc_errors += ioread8(ioaddr + ME_CNT1);
 451        dev->stats.multicast += ioread8(ioaddr + ME_CNT0);
 452        spin_unlock_irqrestore(&priv->lock, flags);
 453
 454        return &dev->stats;
 455}
 456
 457/* Stop RDC MAC and Free the allocated resource */
 458static void r6040_down(struct net_device *dev)
 459{
 460        struct r6040_private *lp = netdev_priv(dev);
 461        void __iomem *ioaddr = lp->base;
 462        u16 *adrp;
 463
 464        /* Stop MAC */
 465        iowrite16(MSK_INT, ioaddr + MIER);      /* Mask Off Interrupt */
 466
 467        /* Reset RDC MAC */
 468        r6040_reset_mac(lp);
 469
 470        /* Restore MAC Address to MIDx */
 471        adrp = (u16 *) dev->dev_addr;
 472        iowrite16(adrp[0], ioaddr + MID_0L);
 473        iowrite16(adrp[1], ioaddr + MID_0M);
 474        iowrite16(adrp[2], ioaddr + MID_0H);
 475
 476        phy_stop(dev->phydev);
 477}
 478
 479static int r6040_close(struct net_device *dev)
 480{
 481        struct r6040_private *lp = netdev_priv(dev);
 482        struct pci_dev *pdev = lp->pdev;
 483
 484        spin_lock_irq(&lp->lock);
 485        napi_disable(&lp->napi);
 486        netif_stop_queue(dev);
 487        r6040_down(dev);
 488
 489        free_irq(dev->irq, dev);
 490
 491        /* Free RX buffer */
 492        r6040_free_rxbufs(dev);
 493
 494        /* Free TX buffer */
 495        r6040_free_txbufs(dev);
 496
 497        spin_unlock_irq(&lp->lock);
 498
 499        /* Free Descriptor memory */
 500        if (lp->rx_ring) {
 501                pci_free_consistent(pdev,
 502                                RX_DESC_SIZE, lp->rx_ring, lp->rx_ring_dma);
 503                lp->rx_ring = NULL;
 504        }
 505
 506        if (lp->tx_ring) {
 507                pci_free_consistent(pdev,
 508                                TX_DESC_SIZE, lp->tx_ring, lp->tx_ring_dma);
 509                lp->tx_ring = NULL;
 510        }
 511
 512        return 0;
 513}
 514
 515static int r6040_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 516{
 517        if (!dev->phydev)
 518                return -EINVAL;
 519
 520        return phy_mii_ioctl(dev->phydev, rq, cmd);
 521}
 522
 523static int r6040_rx(struct net_device *dev, int limit)
 524{
 525        struct r6040_private *priv = netdev_priv(dev);
 526        struct r6040_descriptor *descptr = priv->rx_remove_ptr;
 527        struct sk_buff *skb_ptr, *new_skb;
 528        int count = 0;
 529        u16 err;
 530
 531        /* Limit not reached and the descriptor belongs to the CPU */
 532        while (count < limit && !(descptr->status & DSC_OWNER_MAC)) {
 533                /* Read the descriptor status */
 534                err = descptr->status;
 535                /* Global error status set */
 536                if (err & DSC_RX_ERR) {
 537                        /* RX dribble */
 538                        if (err & DSC_RX_ERR_DRI)
 539                                dev->stats.rx_frame_errors++;
 540                        /* Buffer length exceeded */
 541                        if (err & DSC_RX_ERR_BUF)
 542                                dev->stats.rx_length_errors++;
 543                        /* Packet too long */
 544                        if (err & DSC_RX_ERR_LONG)
 545                                dev->stats.rx_length_errors++;
 546                        /* Packet < 64 bytes */
 547                        if (err & DSC_RX_ERR_RUNT)
 548                                dev->stats.rx_length_errors++;
 549                        /* CRC error */
 550                        if (err & DSC_RX_ERR_CRC) {
 551                                spin_lock(&priv->lock);
 552                                dev->stats.rx_crc_errors++;
 553                                spin_unlock(&priv->lock);
 554                        }
 555                        goto next_descr;
 556                }
 557
 558                /* Packet successfully received */
 559                new_skb = netdev_alloc_skb(dev, MAX_BUF_SIZE);
 560                if (!new_skb) {
 561                        dev->stats.rx_dropped++;
 562                        goto next_descr;
 563                }
 564                skb_ptr = descptr->skb_ptr;
 565                skb_ptr->dev = priv->dev;
 566
 567                /* Do not count the CRC */
 568                skb_put(skb_ptr, descptr->len - 4);
 569                pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
 570                                        MAX_BUF_SIZE, PCI_DMA_FROMDEVICE);
 571                skb_ptr->protocol = eth_type_trans(skb_ptr, priv->dev);
 572
 573                /* Send to upper layer */
 574                netif_receive_skb(skb_ptr);
 575                dev->stats.rx_packets++;
 576                dev->stats.rx_bytes += descptr->len - 4;
 577
 578                /* put new skb into descriptor */
 579                descptr->skb_ptr = new_skb;
 580                descptr->buf = cpu_to_le32(pci_map_single(priv->pdev,
 581                                                descptr->skb_ptr->data,
 582                                        MAX_BUF_SIZE, PCI_DMA_FROMDEVICE));
 583
 584next_descr:
 585                /* put the descriptor back to the MAC */
 586                descptr->status = DSC_OWNER_MAC;
 587                descptr = descptr->vndescp;
 588                count++;
 589        }
 590        priv->rx_remove_ptr = descptr;
 591
 592        return count;
 593}
 594
 595static void r6040_tx(struct net_device *dev)
 596{
 597        struct r6040_private *priv = netdev_priv(dev);
 598        struct r6040_descriptor *descptr;
 599        void __iomem *ioaddr = priv->base;
 600        struct sk_buff *skb_ptr;
 601        u16 err;
 602
 603        spin_lock(&priv->lock);
 604        descptr = priv->tx_remove_ptr;
 605        while (priv->tx_free_desc < TX_DCNT) {
 606                /* Check for errors */
 607                err = ioread16(ioaddr + MLSR);
 608
 609                if (err & TX_FIFO_UNDR)
 610                        dev->stats.tx_fifo_errors++;
 611                if (err & (TX_EXCEEDC | TX_LATEC))
 612                        dev->stats.tx_carrier_errors++;
 613
 614                if (descptr->status & DSC_OWNER_MAC)
 615                        break; /* Not complete */
 616                skb_ptr = descptr->skb_ptr;
 617
 618                /* Statistic Counter */
 619                dev->stats.tx_packets++;
 620                dev->stats.tx_bytes += skb_ptr->len;
 621
 622                pci_unmap_single(priv->pdev, le32_to_cpu(descptr->buf),
 623                        skb_ptr->len, PCI_DMA_TODEVICE);
 624                /* Free buffer */
 625                dev_kfree_skb(skb_ptr);
 626                descptr->skb_ptr = NULL;
 627                /* To next descriptor */
 628                descptr = descptr->vndescp;
 629                priv->tx_free_desc++;
 630        }
 631        priv->tx_remove_ptr = descptr;
 632
 633        if (priv->tx_free_desc)
 634                netif_wake_queue(dev);
 635        spin_unlock(&priv->lock);
 636}
 637
 638static int r6040_poll(struct napi_struct *napi, int budget)
 639{
 640        struct r6040_private *priv =
 641                container_of(napi, struct r6040_private, napi);
 642        struct net_device *dev = priv->dev;
 643        void __iomem *ioaddr = priv->base;
 644        int work_done;
 645
 646        r6040_tx(dev);
 647
 648        work_done = r6040_rx(dev, budget);
 649
 650        if (work_done < budget) {
 651                napi_complete_done(napi, work_done);
 652                /* Enable RX/TX interrupt */
 653                iowrite16(ioread16(ioaddr + MIER) | RX_INTS | TX_INTS,
 654                          ioaddr + MIER);
 655        }
 656        return work_done;
 657}
 658
 659/* The RDC interrupt handler. */
 660static irqreturn_t r6040_interrupt(int irq, void *dev_id)
 661{
 662        struct net_device *dev = dev_id;
 663        struct r6040_private *lp = netdev_priv(dev);
 664        void __iomem *ioaddr = lp->base;
 665        u16 misr, status;
 666
 667        /* Save MIER */
 668        misr = ioread16(ioaddr + MIER);
 669        /* Mask off RDC MAC interrupt */
 670        iowrite16(MSK_INT, ioaddr + MIER);
 671        /* Read MISR status and clear */
 672        status = ioread16(ioaddr + MISR);
 673
 674        if (status == 0x0000 || status == 0xffff) {
 675                /* Restore RDC MAC interrupt */
 676                iowrite16(misr, ioaddr + MIER);
 677                return IRQ_NONE;
 678        }
 679
 680        /* RX interrupt request */
 681        if (status & (RX_INTS | TX_INTS)) {
 682                if (status & RX_NO_DESC) {
 683                        /* RX descriptor unavailable */
 684                        dev->stats.rx_dropped++;
 685                        dev->stats.rx_missed_errors++;
 686                }
 687                if (status & RX_FIFO_FULL)
 688                        dev->stats.rx_fifo_errors++;
 689
 690                if (likely(napi_schedule_prep(&lp->napi))) {
 691                        /* Mask off RX interrupt */
 692                        misr &= ~(RX_INTS | TX_INTS);
 693                        __napi_schedule_irqoff(&lp->napi);
 694                }
 695        }
 696
 697        /* Restore RDC MAC interrupt */
 698        iowrite16(misr, ioaddr + MIER);
 699
 700        return IRQ_HANDLED;
 701}
 702
 703#ifdef CONFIG_NET_POLL_CONTROLLER
 704static void r6040_poll_controller(struct net_device *dev)
 705{
 706        disable_irq(dev->irq);
 707        r6040_interrupt(dev->irq, dev);
 708        enable_irq(dev->irq);
 709}
 710#endif
 711
 712/* Init RDC MAC */
 713static int r6040_up(struct net_device *dev)
 714{
 715        struct r6040_private *lp = netdev_priv(dev);
 716        void __iomem *ioaddr = lp->base;
 717        int ret;
 718
 719        /* Initialise and alloc RX/TX buffers */
 720        r6040_init_txbufs(dev);
 721        ret = r6040_alloc_rxbufs(dev);
 722        if (ret)
 723                return ret;
 724
 725        /* improve performance (by RDC guys) */
 726        r6040_phy_write(ioaddr, 30, 17,
 727                        (r6040_phy_read(ioaddr, 30, 17) | 0x4000));
 728        r6040_phy_write(ioaddr, 30, 17,
 729                        ~((~r6040_phy_read(ioaddr, 30, 17)) | 0x2000));
 730        r6040_phy_write(ioaddr, 0, 19, 0x0000);
 731        r6040_phy_write(ioaddr, 0, 30, 0x01F0);
 732
 733        /* Initialize all MAC registers */
 734        r6040_init_mac_regs(dev);
 735
 736        phy_start(dev->phydev);
 737
 738        return 0;
 739}
 740
 741
 742/* Read/set MAC address routines */
 743static void r6040_mac_address(struct net_device *dev)
 744{
 745        struct r6040_private *lp = netdev_priv(dev);
 746        void __iomem *ioaddr = lp->base;
 747        u16 *adrp;
 748
 749        /* Reset MAC */
 750        r6040_reset_mac(lp);
 751
 752        /* Restore MAC Address */
 753        adrp = (u16 *) dev->dev_addr;
 754        iowrite16(adrp[0], ioaddr + MID_0L);
 755        iowrite16(adrp[1], ioaddr + MID_0M);
 756        iowrite16(adrp[2], ioaddr + MID_0H);
 757}
 758
 759static int r6040_open(struct net_device *dev)
 760{
 761        struct r6040_private *lp = netdev_priv(dev);
 762        int ret;
 763
 764        /* Request IRQ and Register interrupt handler */
 765        ret = request_irq(dev->irq, r6040_interrupt,
 766                IRQF_SHARED, dev->name, dev);
 767        if (ret)
 768                goto out;
 769
 770        /* Set MAC address */
 771        r6040_mac_address(dev);
 772
 773        /* Allocate Descriptor memory */
 774        lp->rx_ring =
 775                pci_alloc_consistent(lp->pdev, RX_DESC_SIZE, &lp->rx_ring_dma);
 776        if (!lp->rx_ring) {
 777                ret = -ENOMEM;
 778                goto err_free_irq;
 779        }
 780
 781        lp->tx_ring =
 782                pci_alloc_consistent(lp->pdev, TX_DESC_SIZE, &lp->tx_ring_dma);
 783        if (!lp->tx_ring) {
 784                ret = -ENOMEM;
 785                goto err_free_rx_ring;
 786        }
 787
 788        ret = r6040_up(dev);
 789        if (ret)
 790                goto err_free_tx_ring;
 791
 792        napi_enable(&lp->napi);
 793        netif_start_queue(dev);
 794
 795        return 0;
 796
 797err_free_tx_ring:
 798        pci_free_consistent(lp->pdev, TX_DESC_SIZE, lp->tx_ring,
 799                        lp->tx_ring_dma);
 800err_free_rx_ring:
 801        pci_free_consistent(lp->pdev, RX_DESC_SIZE, lp->rx_ring,
 802                        lp->rx_ring_dma);
 803err_free_irq:
 804        free_irq(dev->irq, dev);
 805out:
 806        return ret;
 807}
 808
 809static netdev_tx_t r6040_start_xmit(struct sk_buff *skb,
 810                                    struct net_device *dev)
 811{
 812        struct r6040_private *lp = netdev_priv(dev);
 813        struct r6040_descriptor *descptr;
 814        void __iomem *ioaddr = lp->base;
 815        unsigned long flags;
 816
 817        if (skb_put_padto(skb, ETH_ZLEN) < 0)
 818                return NETDEV_TX_OK;
 819
 820        /* Critical Section */
 821        spin_lock_irqsave(&lp->lock, flags);
 822
 823        /* TX resource check */
 824        if (!lp->tx_free_desc) {
 825                spin_unlock_irqrestore(&lp->lock, flags);
 826                netif_stop_queue(dev);
 827                netdev_err(dev, ": no tx descriptor\n");
 828                return NETDEV_TX_BUSY;
 829        }
 830
 831        /* Set TX descriptor & Transmit it */
 832        lp->tx_free_desc--;
 833        descptr = lp->tx_insert_ptr;
 834        descptr->len = skb->len;
 835        descptr->skb_ptr = skb;
 836        descptr->buf = cpu_to_le32(pci_map_single(lp->pdev,
 837                skb->data, skb->len, PCI_DMA_TODEVICE));
 838        descptr->status = DSC_OWNER_MAC;
 839
 840        skb_tx_timestamp(skb);
 841
 842        /* Trigger the MAC to check the TX descriptor */
 843        if (!skb->xmit_more || netif_queue_stopped(dev))
 844                iowrite16(TM2TX, ioaddr + MTPR);
 845        lp->tx_insert_ptr = descptr->vndescp;
 846
 847        /* If no tx resource, stop */
 848        if (!lp->tx_free_desc)
 849                netif_stop_queue(dev);
 850
 851        spin_unlock_irqrestore(&lp->lock, flags);
 852
 853        return NETDEV_TX_OK;
 854}
 855
 856static void r6040_multicast_list(struct net_device *dev)
 857{
 858        struct r6040_private *lp = netdev_priv(dev);
 859        void __iomem *ioaddr = lp->base;
 860        unsigned long flags;
 861        struct netdev_hw_addr *ha;
 862        int i;
 863        u16 *adrp;
 864        u16 hash_table[4] = { 0 };
 865
 866        spin_lock_irqsave(&lp->lock, flags);
 867
 868        /* Keep our MAC Address */
 869        adrp = (u16 *)dev->dev_addr;
 870        iowrite16(adrp[0], ioaddr + MID_0L);
 871        iowrite16(adrp[1], ioaddr + MID_0M);
 872        iowrite16(adrp[2], ioaddr + MID_0H);
 873
 874        /* Clear AMCP & PROM bits */
 875        lp->mcr0 = ioread16(ioaddr + MCR0) & ~(MCR0_PROMISC | MCR0_HASH_EN);
 876
 877        /* Promiscuous mode */
 878        if (dev->flags & IFF_PROMISC)
 879                lp->mcr0 |= MCR0_PROMISC;
 880
 881        /* Enable multicast hash table function to
 882         * receive all multicast packets. */
 883        else if (dev->flags & IFF_ALLMULTI) {
 884                lp->mcr0 |= MCR0_HASH_EN;
 885
 886                for (i = 0; i < MCAST_MAX ; i++) {
 887                        iowrite16(0, ioaddr + MID_1L + 8 * i);
 888                        iowrite16(0, ioaddr + MID_1M + 8 * i);
 889                        iowrite16(0, ioaddr + MID_1H + 8 * i);
 890                }
 891
 892                for (i = 0; i < 4; i++)
 893                        hash_table[i] = 0xffff;
 894        }
 895        /* Use internal multicast address registers if the number of
 896         * multicast addresses is not greater than MCAST_MAX. */
 897        else if (netdev_mc_count(dev) <= MCAST_MAX) {
 898                i = 0;
 899                netdev_for_each_mc_addr(ha, dev) {
 900                        u16 *adrp = (u16 *) ha->addr;
 901                        iowrite16(adrp[0], ioaddr + MID_1L + 8 * i);
 902                        iowrite16(adrp[1], ioaddr + MID_1M + 8 * i);
 903                        iowrite16(adrp[2], ioaddr + MID_1H + 8 * i);
 904                        i++;
 905                }
 906                while (i < MCAST_MAX) {
 907                        iowrite16(0, ioaddr + MID_1L + 8 * i);
 908                        iowrite16(0, ioaddr + MID_1M + 8 * i);
 909                        iowrite16(0, ioaddr + MID_1H + 8 * i);
 910                        i++;
 911                }
 912        }
 913        /* Otherwise, Enable multicast hash table function. */
 914        else {
 915                u32 crc;
 916
 917                lp->mcr0 |= MCR0_HASH_EN;
 918
 919                for (i = 0; i < MCAST_MAX ; i++) {
 920                        iowrite16(0, ioaddr + MID_1L + 8 * i);
 921                        iowrite16(0, ioaddr + MID_1M + 8 * i);
 922                        iowrite16(0, ioaddr + MID_1H + 8 * i);
 923                }
 924
 925                /* Build multicast hash table */
 926                netdev_for_each_mc_addr(ha, dev) {
 927                        u8 *addrs = ha->addr;
 928
 929                        crc = ether_crc(ETH_ALEN, addrs);
 930                        crc >>= 26;
 931                        hash_table[crc >> 4] |= 1 << (crc & 0xf);
 932                }
 933        }
 934
 935        iowrite16(lp->mcr0, ioaddr + MCR0);
 936
 937        /* Fill the MAC hash tables with their values */
 938        if (lp->mcr0 & MCR0_HASH_EN) {
 939                iowrite16(hash_table[0], ioaddr + MAR0);
 940                iowrite16(hash_table[1], ioaddr + MAR1);
 941                iowrite16(hash_table[2], ioaddr + MAR2);
 942                iowrite16(hash_table[3], ioaddr + MAR3);
 943        }
 944
 945        spin_unlock_irqrestore(&lp->lock, flags);
 946}
 947
 948static void netdev_get_drvinfo(struct net_device *dev,
 949                        struct ethtool_drvinfo *info)
 950{
 951        struct r6040_private *rp = netdev_priv(dev);
 952
 953        strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
 954        strlcpy(info->version, DRV_VERSION, sizeof(info->version));
 955        strlcpy(info->bus_info, pci_name(rp->pdev), sizeof(info->bus_info));
 956}
 957
 958static const struct ethtool_ops netdev_ethtool_ops = {
 959        .get_drvinfo            = netdev_get_drvinfo,
 960        .get_link               = ethtool_op_get_link,
 961        .get_ts_info            = ethtool_op_get_ts_info,
 962        .get_link_ksettings     = phy_ethtool_get_link_ksettings,
 963        .set_link_ksettings     = phy_ethtool_set_link_ksettings,
 964};
 965
 966static const struct net_device_ops r6040_netdev_ops = {
 967        .ndo_open               = r6040_open,
 968        .ndo_stop               = r6040_close,
 969        .ndo_start_xmit         = r6040_start_xmit,
 970        .ndo_get_stats          = r6040_get_stats,
 971        .ndo_set_rx_mode        = r6040_multicast_list,
 972        .ndo_change_mtu         = eth_change_mtu,
 973        .ndo_validate_addr      = eth_validate_addr,
 974        .ndo_set_mac_address    = eth_mac_addr,
 975        .ndo_do_ioctl           = r6040_ioctl,
 976        .ndo_tx_timeout         = r6040_tx_timeout,
 977#ifdef CONFIG_NET_POLL_CONTROLLER
 978        .ndo_poll_controller    = r6040_poll_controller,
 979#endif
 980};
 981
 982static void r6040_adjust_link(struct net_device *dev)
 983{
 984        struct r6040_private *lp = netdev_priv(dev);
 985        struct phy_device *phydev = dev->phydev;
 986        int status_changed = 0;
 987        void __iomem *ioaddr = lp->base;
 988
 989        BUG_ON(!phydev);
 990
 991        if (lp->old_link != phydev->link) {
 992                status_changed = 1;
 993                lp->old_link = phydev->link;
 994        }
 995
 996        /* reflect duplex change */
 997        if (phydev->link && (lp->old_duplex != phydev->duplex)) {
 998                lp->mcr0 |= (phydev->duplex == DUPLEX_FULL ? MCR0_FD : 0);
 999                iowrite16(lp->mcr0, ioaddr);
1000

1001                status_changed = 1;
1002                lp->old_duplex = phydev->duplex;
1003        }
1004
1005        if (status_changed)
1006                phy_print_status(phydev);
1007}
1008
1009static int r6040_mii_probe(struct net_device *dev)
1010{
1011        struct r6040_private *lp = netdev_priv(dev);
1012        struct phy_device *phydev = NULL;
1013
1014        phydev = phy_find_first(lp->mii_bus);
1015        if (!phydev) {
1016                dev_err(&lp->pdev->dev, "no PHY found\n");
1017                return -ENODEV;
1018        }
1019
1020        phydev = phy_connect(dev, phydev_name(phydev), &r6040_adjust_link,
1021                             PHY_INTERFACE_MODE_MII);
1022
1023        if (IS_ERR(phydev)) {
1024                dev_err(&lp->pdev->dev, "could not attach to PHY\n");
1025                return PTR_ERR(phydev);
1026        }
1027
1028        /* mask with MAC supported features */
1029        phydev->supported &= (SUPPORTED_10baseT_Half
1030                                | SUPPORTED_10baseT_Full
1031                                | SUPPORTED_100baseT_Half
1032                                | SUPPORTED_100baseT_Full
1033                                | SUPPORTED_Autoneg
1034                                | SUPPORTED_MII
1035                                | SUPPORTED_TP);
1036
1037        phydev->advertising = phydev->supported;
1038        lp->old_link = 0;
1039        lp->old_duplex = -1;
1040
1041        phy_attached_info(phydev);
1042
1043        return 0;
1044}
1045
1046static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1047{
1048        struct net_device *dev;
1049        struct r6040_private *lp;
1050        void __iomem *ioaddr;
1051        int err, io_size = R6040_IO_SIZE;
1052        static int card_idx = -1;
1053        int bar = 0;
1054        u16 *adrp;
1055
1056        pr_info("%s\n", version);
1057
1058        err = pci_enable_device(pdev);
1059        if (err)
1060                goto err_out;
1061
1062        /* this should always be supported */
1063        err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1064        if (err) {
1065                dev_err(&pdev->dev, "32-bit PCI DMA addresses"
1066                                "not supported by the card\n");
1067                goto err_out_disable_dev;
1068        }
1069        err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1070        if (err) {
1071                dev_err(&pdev->dev, "32-bit PCI DMA addresses"
1072                                "not supported by the card\n");
1073                goto err_out_disable_dev;
1074        }
1075
1076        /* IO Size check */
1077        if (pci_resource_len(pdev, bar) < io_size) {
1078                dev_err(&pdev->dev, "Insufficient PCI resources, aborting\n");
1079                err = -EIO;
1080                goto err_out_disable_dev;
1081        }
1082
1083        pci_set_master(pdev);
1084
1085        dev = alloc_etherdev(sizeof(struct r6040_private));
1086        if (!dev) {
1087                err = -ENOMEM;
1088                goto err_out_disable_dev;
1089        }
1090        SET_NETDEV_DEV(dev, &pdev->dev);
1091        lp = netdev_priv(dev);
1092
1093        err = pci_request_regions(pdev, DRV_NAME);
1094
1095        if (err) {
1096                dev_err(&pdev->dev, "Failed to request PCI regions\n");
1097                goto err_out_free_dev;
1098        }
1099
1100        ioaddr = pci_iomap(pdev, bar, io_size);
1101        if (!ioaddr) {
1102                dev_err(&pdev->dev, "ioremap failed for device\n");
1103                err = -EIO;
1104                goto err_out_free_res;
1105        }
1106
1107        /* If PHY status change register is still set to zero it means the
1108         * bootloader didn't initialize it, so we set it to:
1109         * - enable phy status change
1110         * - enable all phy addresses
1111         * - set to lowest timer divider */
1112        if (ioread16(ioaddr + PHY_CC) == 0)
1113                iowrite16(SCEN | PHY_MAX_ADDR << PHYAD_SHIFT |
1114                                7 << TMRDIV_SHIFT, ioaddr + PHY_CC);
1115
1116        /* Init system & device */
1117        lp->base = ioaddr;
1118        dev->irq = pdev->irq;
1119
1120        spin_lock_init(&lp->lock);
1121        pci_set_drvdata(pdev, dev);
1122
1123        /* Set MAC address */
1124        card_idx++;
1125
1126        adrp = (u16 *)dev->dev_addr;
1127        adrp[0] = ioread16(ioaddr + MID_0L);
1128        adrp[1] = ioread16(ioaddr + MID_0M);
1129        adrp[2] = ioread16(ioaddr + MID_0H);
1130
1131        /* Some bootloader/BIOSes do not initialize
1132         * MAC address, warn about that */
1133        if (!(adrp[0] || adrp[1] || adrp[2])) {
1134                netdev_warn(dev, "MAC address not initialized, "
1135                                        "generating random\n");
1136                eth_hw_addr_random(dev);
1137        }
1138
1139        /* Link new device into r6040_root_dev */
1140        lp->pdev = pdev;
1141        lp->dev = dev;
1142
1143        /* Init RDC private data */
1144        lp->mcr0 = MCR0_XMTEN | MCR0_RCVEN;
1145
1146        /* The RDC-specific entries in the device structure. */
1147        dev->netdev_ops = &r6040_netdev_ops;
1148        dev->ethtool_ops = &netdev_ethtool_ops;
1149        dev->watchdog_timeo = TX_TIMEOUT;
1150
1151        netif_napi_add(dev, &lp->napi, r6040_poll, 64);
1152
1153        lp->mii_bus = mdiobus_alloc();
1154        if (!lp->mii_bus) {
1155                dev_err(&pdev->dev, "mdiobus_alloc() failed\n");
1156                err = -ENOMEM;
1157                goto err_out_unmap;
1158        }
1159
1160        lp->mii_bus->priv = dev;
1161        lp->mii_bus->read = r6040_mdiobus_read;
1162        lp->mii_bus->write = r6040_mdiobus_write;
1163        lp->mii_bus->name = "r6040_eth_mii";
1164        snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1165                dev_name(&pdev->dev), card_idx);
1166
1167        err = mdiobus_register(lp->mii_bus);
1168        if (err) {
1169                dev_err(&pdev->dev, "failed to register MII bus\n");
1170                goto err_out_mdio;
1171        }
1172
1173        err = r6040_mii_probe(dev);
1174        if (err) {
1175                dev_err(&pdev->dev, "failed to probe MII bus\n");
1176                goto err_out_mdio_unregister;
1177        }
1178
1179        /* Register net device. After this dev->name assign */
1180        err = register_netdev(dev);
1181        if (err) {
1182                dev_err(&pdev->dev, "Failed to register net device\n");
1183                goto err_out_mdio_unregister;
1184        }
1185        return 0;
1186
1187err_out_mdio_unregister:
1188        mdiobus_unregister(lp->mii_bus);
1189err_out_mdio:
1190        mdiobus_free(lp->mii_bus);
1191err_out_unmap:
1192        netif_napi_del(&lp->napi);
1193        pci_iounmap(pdev, ioaddr);
1194err_out_free_res:
1195        pci_release_regions(pdev);
1196err_out_free_dev:
1197        free_netdev(dev);
1198err_out_disable_dev:
1199        pci_disable_device(pdev);
1200err_out:
1201        return err;
1202}
1203
1204static void r6040_remove_one(struct pci_dev *pdev)
1205{
1206        struct net_device *dev = pci_get_drvdata(pdev);
1207        struct r6040_private *lp = netdev_priv(dev);
1208
1209        unregister_netdev(dev);
1210        mdiobus_unregister(lp->mii_bus);
1211        mdiobus_free(lp->mii_bus);
1212        netif_napi_del(&lp->napi);
1213        pci_iounmap(pdev, lp->base);
1214        pci_release_regions(pdev);
1215        free_netdev(dev);
1216        pci_disable_device(pdev);
1217}
1218
1219
1220static const struct pci_device_id r6040_pci_tbl[] = {
1221        { PCI_DEVICE(PCI_VENDOR_ID_RDC, 0x6040) },
1222        { 0 }
1223};
1224MODULE_DEVICE_TABLE(pci, r6040_pci_tbl);
1225
1226static struct pci_driver r6040_driver = {
1227        .name           = DRV_NAME,
1228        .id_table       = r6040_pci_tbl,
1229        .probe          = r6040_init_one,
1230        .remove         = r6040_remove_one,
1231};
1232
1233module_pci_driver(r6040_driver);
1234