linux/drivers/net/ethernet/amd/sunlance.c
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   1/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
   2 * lance.c: Linux/Sparc/Lance driver
   3 *
   4 *      Written 1995, 1996 by Miguel de Icaza
   5 * Sources:
   6 *      The Linux  depca driver
   7 *      The Linux  lance driver.
   8 *      The Linux  skeleton driver.
   9 *      The NetBSD Sparc/Lance driver.
  10 *      Theo de Raadt (deraadt@openbsd.org)
  11 *      NCR92C990 Lan Controller manual
  12 *
  13 * 1.4:
  14 *      Added support to run with a ledma on the Sun4m
  15 *
  16 * 1.5:
  17 *      Added multiple card detection.
  18 *
  19 *       4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
  20 *                (ecd@skynet.be)
  21 *
  22 *       5/15/96: auto carrier detection on sun4m by Eddie C. Dost
  23 *                (ecd@skynet.be)
  24 *
  25 *       5/17/96: lebuffer on scsi/ether cards now work David S. Miller
  26 *                (davem@caip.rutgers.edu)
  27 *
  28 *       5/29/96: override option 'tpe-link-test?', if it is 'false', as
  29 *                this disables auto carrier detection on sun4m. Eddie C. Dost
  30 *                (ecd@skynet.be)
  31 *
  32 * 1.7:
  33 *       6/26/96: Bug fix for multiple ledmas, miguel.
  34 *
  35 * 1.8:
  36 *                Stole multicast code from depca.c, fixed lance_tx.
  37 *
  38 * 1.9:
  39 *       8/21/96: Fixed the multicast code (Pedro Roque)
  40 *
  41 *       8/28/96: Send fake packet in lance_open() if auto_select is true,
  42 *                so we can detect the carrier loss condition in time.
  43 *                Eddie C. Dost (ecd@skynet.be)
  44 *
  45 *       9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
  46 *                MNA trap during chksum_partial_copy(). (ecd@skynet.be)
  47 *
  48 *      11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
  49 *
  50 *      12/22/96: Don't loop forever in lance_rx() on incomplete packets.
  51 *                This was the sun4c killer. Shit, stupid bug.
  52 *                (ecd@skynet.be)
  53 *
  54 * 1.10:
  55 *       1/26/97: Modularize driver. (ecd@skynet.be)
  56 *
  57 * 1.11:
  58 *      12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
  59 *
  60 * 1.12:
  61 *       11/3/99: Fixed SMP race in lance_start_xmit found by davem.
  62 *                Anton Blanchard (anton@progsoc.uts.edu.au)
  63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
  64 *                David S. Miller (davem@redhat.com)
  65 * 2.01:
  66 *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
  67 *
  68 */
  69
  70#undef DEBUG_DRIVER
  71
  72static char lancestr[] = "LANCE";
  73
  74#include <linux/module.h>
  75#include <linux/kernel.h>
  76#include <linux/types.h>
  77#include <linux/fcntl.h>
  78#include <linux/interrupt.h>
  79#include <linux/ioport.h>
  80#include <linux/in.h>
  81#include <linux/string.h>
  82#include <linux/delay.h>
  83#include <linux/crc32.h>
  84#include <linux/errno.h>
  85#include <linux/socket.h> /* Used for the temporal inet entries and routing */
  86#include <linux/route.h>
  87#include <linux/netdevice.h>
  88#include <linux/etherdevice.h>
  89#include <linux/skbuff.h>
  90#include <linux/ethtool.h>
  91#include <linux/bitops.h>
  92#include <linux/dma-mapping.h>
  93#include <linux/of.h>
  94#include <linux/of_device.h>
  95#include <linux/gfp.h>
  96
  97#include <asm/io.h>
  98#include <asm/dma.h>
  99#include <asm/pgtable.h>
 100#include <asm/byteorder.h>      /* Used by the checksum routines */
 101#include <asm/idprom.h>
 102#include <asm/prom.h>
 103#include <asm/auxio.h>          /* For tpe-link-test? setting */
 104#include <asm/irq.h>
 105
 106#define DRV_NAME        "sunlance"
 107#define DRV_VERSION     "2.02"
 108#define DRV_RELDATE     "8/24/03"
 109#define DRV_AUTHOR      "Miguel de Icaza (miguel@nuclecu.unam.mx)"
 110
 111static char version[] =
 112        DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
 113
 114MODULE_VERSION(DRV_VERSION);
 115MODULE_AUTHOR(DRV_AUTHOR);
 116MODULE_DESCRIPTION("Sun Lance ethernet driver");
 117MODULE_LICENSE("GPL");
 118
 119/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
 120#ifndef LANCE_LOG_TX_BUFFERS
 121#define LANCE_LOG_TX_BUFFERS 4
 122#define LANCE_LOG_RX_BUFFERS 4
 123#endif
 124
 125#define LE_CSR0 0
 126#define LE_CSR1 1
 127#define LE_CSR2 2
 128#define LE_CSR3 3
 129
 130#define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
 131
 132#define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
 133#define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
 134#define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
 135#define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
 136#define LE_C0_MERR      0x0800  /* ME:   Memory error */
 137#define LE_C0_RINT      0x0400  /* Received interrupt */
 138#define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
 139#define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
 140#define LE_C0_INTR      0x0080  /* Interrupt or error */
 141#define LE_C0_INEA      0x0040  /* Interrupt enable */
 142#define LE_C0_RXON      0x0020  /* Receiver on */
 143#define LE_C0_TXON      0x0010  /* Transmitter on */
 144#define LE_C0_TDMD      0x0008  /* Transmitter demand */
 145#define LE_C0_STOP      0x0004  /* Stop the card */
 146#define LE_C0_STRT      0x0002  /* Start the card */
 147#define LE_C0_INIT      0x0001  /* Init the card */
 148
 149#define LE_C3_BSWP      0x4     /* SWAP */
 150#define LE_C3_ACON      0x2     /* ALE Control */
 151#define LE_C3_BCON      0x1     /* Byte control */
 152
 153/* Receive message descriptor 1 */
 154#define LE_R1_OWN       0x80    /* Who owns the entry */
 155#define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
 156#define LE_R1_FRA       0x20    /* FRA: Frame error */
 157#define LE_R1_OFL       0x10    /* OFL: Frame overflow */
 158#define LE_R1_CRC       0x08    /* CRC error */
 159#define LE_R1_BUF       0x04    /* BUF: Buffer error */
 160#define LE_R1_SOP       0x02    /* Start of packet */
 161#define LE_R1_EOP       0x01    /* End of packet */
 162#define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */
 163
 164#define LE_T1_OWN       0x80    /* Lance owns the packet */
 165#define LE_T1_ERR       0x40    /* Error summary */
 166#define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
 167#define LE_T1_EONE      0x08    /* Error: one retry needed */
 168#define LE_T1_EDEF      0x04    /* Error: deferred */
 169#define LE_T1_SOP       0x02    /* Start of packet */
 170#define LE_T1_EOP       0x01    /* End of packet */
 171#define LE_T1_POK       0x03    /* Packet is complete: SOP + EOP */
 172
 173#define LE_T3_BUF       0x8000  /* Buffer error */
 174#define LE_T3_UFL       0x4000  /* Error underflow */
 175#define LE_T3_LCOL      0x1000  /* Error late collision */
 176#define LE_T3_CLOS      0x0800  /* Error carrier loss */
 177#define LE_T3_RTY       0x0400  /* Error retry */
 178#define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
 179
 180#define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
 181#define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
 182#define TX_RING_LEN_BITS                ((LANCE_LOG_TX_BUFFERS) << 29)
 183#define TX_NEXT(__x)                    (((__x)+1) & TX_RING_MOD_MASK)
 184
 185#define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
 186#define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
 187#define RX_RING_LEN_BITS                ((LANCE_LOG_RX_BUFFERS) << 29)
 188#define RX_NEXT(__x)                    (((__x)+1) & RX_RING_MOD_MASK)
 189
 190#define PKT_BUF_SZ              1544
 191#define RX_BUFF_SIZE            PKT_BUF_SZ
 192#define TX_BUFF_SIZE            PKT_BUF_SZ
 193
 194struct lance_rx_desc {
 195        u16     rmd0;           /* low address of packet */
 196        u8      rmd1_bits;      /* descriptor bits */
 197        u8      rmd1_hadr;      /* high address of packet */
 198        s16     length;         /* This length is 2s complement (negative)!
 199                                 * Buffer length
 200                                 */
 201        u16     mblength;       /* This is the actual number of bytes received */
 202};
 203
 204struct lance_tx_desc {
 205        u16     tmd0;           /* low address of packet */
 206        u8      tmd1_bits;      /* descriptor bits */
 207        u8      tmd1_hadr;      /* high address of packet */
 208        s16     length;         /* Length is 2s complement (negative)! */
 209        u16     misc;
 210};
 211
 212/* The LANCE initialization block, described in databook. */
 213/* On the Sparc, this block should be on a DMA region     */
 214struct lance_init_block {
 215        u16     mode;           /* Pre-set mode (reg. 15) */
 216        u8      phys_addr[6];   /* Physical ethernet address */
 217        u32     filter[2];      /* Multicast filter. */
 218
 219        /* Receive and transmit ring base, along with extra bits. */
 220        u16     rx_ptr;         /* receive descriptor addr */
 221        u16     rx_len;         /* receive len and high addr */
 222        u16     tx_ptr;         /* transmit descriptor addr */
 223        u16     tx_len;         /* transmit len and high addr */
 224
 225        /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
 226        struct lance_rx_desc brx_ring[RX_RING_SIZE];
 227        struct lance_tx_desc btx_ring[TX_RING_SIZE];
 228
 229        u8      tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
 230        u8      pad[2];         /* align rx_buf for copy_and_sum(). */
 231        u8      rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
 232};
 233
 234#define libdesc_offset(rt, elem) \
 235((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
 236
 237#define libbuff_offset(rt, elem) \
 238((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
 239
 240struct lance_private {
 241        void __iomem    *lregs;         /* Lance RAP/RDP regs.          */
 242        void __iomem    *dregs;         /* DMA controller regs.         */
 243        struct lance_init_block __iomem *init_block_iomem;
 244        struct lance_init_block *init_block_mem;
 245
 246        spinlock_t      lock;
 247
 248        int             rx_new, tx_new;
 249        int             rx_old, tx_old;
 250
 251        struct platform_device *ledma;  /* If set this points to ledma  */
 252        char            tpe;            /* cable-selection is TPE       */
 253        char            auto_select;    /* cable-selection by carrier   */
 254        char            burst_sizes;    /* ledma SBus burst sizes       */
 255        char            pio_buffer;     /* init block in PIO space?     */
 256
 257        unsigned short  busmaster_regval;
 258
 259        void (*init_ring)(struct net_device *);
 260        void (*rx)(struct net_device *);
 261        void (*tx)(struct net_device *);
 262
 263        char                   *name;
 264        dma_addr_t              init_block_dvma;
 265        struct net_device      *dev;              /* Backpointer        */
 266        struct platform_device       *op;
 267        struct platform_device       *lebuffer;
 268        struct timer_list       multicast_timer;
 269};
 270
 271#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 272                        lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
 273                        lp->tx_old - lp->tx_new-1)
 274
 275/* Lance registers. */
 276#define RDP             0x00UL          /* register data port           */
 277#define RAP             0x02UL          /* register address port        */
 278#define LANCE_REG_SIZE  0x04UL
 279
 280#define STOP_LANCE(__lp) \
 281do {    void __iomem *__base = (__lp)->lregs; \
 282        sbus_writew(LE_CSR0,    __base + RAP); \
 283        sbus_writew(LE_C0_STOP, __base + RDP); \
 284} while (0)
 285
 286int sparc_lance_debug = 2;
 287
 288/* The Lance uses 24 bit addresses */
 289/* On the Sun4c the DVMA will provide the remaining bytes for us */
 290/* On the Sun4m we have to instruct the ledma to provide them    */
 291/* Even worse, on scsi/ether SBUS cards, the init block and the
 292 * transmit/receive buffers are addresses as offsets from absolute
 293 * zero on the lebuffer PIO area. -DaveM
 294 */
 295
 296#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
 297
 298/* Load the CSR registers */
 299static void load_csrs(struct lance_private *lp)
 300{
 301        u32 leptr;
 302
 303        if (lp->pio_buffer)
 304                leptr = 0;
 305        else
 306                leptr = LANCE_ADDR(lp->init_block_dvma);
 307
 308        sbus_writew(LE_CSR1,              lp->lregs + RAP);
 309        sbus_writew(leptr & 0xffff,       lp->lregs + RDP);
 310        sbus_writew(LE_CSR2,              lp->lregs + RAP);
 311        sbus_writew(leptr >> 16,          lp->lregs + RDP);
 312        sbus_writew(LE_CSR3,              lp->lregs + RAP);
 313        sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
 314
 315        /* Point back to csr0 */
 316        sbus_writew(LE_CSR0, lp->lregs + RAP);
 317}
 318
 319/* Setup the Lance Rx and Tx rings */
 320static void lance_init_ring_dvma(struct net_device *dev)
 321{
 322        struct lance_private *lp = netdev_priv(dev);
 323        struct lance_init_block *ib = lp->init_block_mem;
 324        dma_addr_t aib = lp->init_block_dvma;
 325        __u32 leptr;
 326        int i;
 327
 328        /* Lock out other processes while setting up hardware */
 329        netif_stop_queue(dev);
 330        lp->rx_new = lp->tx_new = 0;
 331        lp->rx_old = lp->tx_old = 0;
 332
 333        /* Copy the ethernet address to the lance init block
 334         * Note that on the sparc you need to swap the ethernet address.
 335         */
 336        ib->phys_addr [0] = dev->dev_addr [1];
 337        ib->phys_addr [1] = dev->dev_addr [0];
 338        ib->phys_addr [2] = dev->dev_addr [3];
 339        ib->phys_addr [3] = dev->dev_addr [2];
 340        ib->phys_addr [4] = dev->dev_addr [5];
 341        ib->phys_addr [5] = dev->dev_addr [4];
 342
 343        /* Setup the Tx ring entries */
 344        for (i = 0; i < TX_RING_SIZE; i++) {
 345                leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
 346                ib->btx_ring [i].tmd0      = leptr;
 347                ib->btx_ring [i].tmd1_hadr = leptr >> 16;
 348                ib->btx_ring [i].tmd1_bits = 0;
 349                ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
 350                ib->btx_ring [i].misc      = 0;
 351        }
 352
 353        /* Setup the Rx ring entries */
 354        for (i = 0; i < RX_RING_SIZE; i++) {
 355                leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
 356
 357                ib->brx_ring [i].rmd0      = leptr;
 358                ib->brx_ring [i].rmd1_hadr = leptr >> 16;
 359                ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
 360                ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
 361                ib->brx_ring [i].mblength  = 0;
 362        }
 363
 364        /* Setup the initialization block */
 365
 366        /* Setup rx descriptor pointer */
 367        leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
 368        ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
 369        ib->rx_ptr = leptr;
 370
 371        /* Setup tx descriptor pointer */
 372        leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
 373        ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
 374        ib->tx_ptr = leptr;
 375}
 376
 377static void lance_init_ring_pio(struct net_device *dev)
 378{
 379        struct lance_private *lp = netdev_priv(dev);
 380        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 381        u32 leptr;
 382        int i;
 383
 384        /* Lock out other processes while setting up hardware */
 385        netif_stop_queue(dev);
 386        lp->rx_new = lp->tx_new = 0;
 387        lp->rx_old = lp->tx_old = 0;
 388
 389        /* Copy the ethernet address to the lance init block
 390         * Note that on the sparc you need to swap the ethernet address.
 391         */
 392        sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
 393        sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
 394        sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
 395        sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
 396        sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
 397        sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
 398
 399        /* Setup the Tx ring entries */
 400        for (i = 0; i < TX_RING_SIZE; i++) {
 401                leptr = libbuff_offset(tx_buf, i);
 402                sbus_writew(leptr,      &ib->btx_ring [i].tmd0);
 403                sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
 404                sbus_writeb(0,          &ib->btx_ring [i].tmd1_bits);
 405
 406                /* The ones required by tmd2 */
 407                sbus_writew(0xf000,     &ib->btx_ring [i].length);
 408                sbus_writew(0,          &ib->btx_ring [i].misc);
 409        }
 410
 411        /* Setup the Rx ring entries */
 412        for (i = 0; i < RX_RING_SIZE; i++) {
 413                leptr = libbuff_offset(rx_buf, i);
 414
 415                sbus_writew(leptr,      &ib->brx_ring [i].rmd0);
 416                sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
 417                sbus_writeb(LE_R1_OWN,  &ib->brx_ring [i].rmd1_bits);
 418                sbus_writew(-RX_BUFF_SIZE|0xf000,
 419                            &ib->brx_ring [i].length);
 420                sbus_writew(0,          &ib->brx_ring [i].mblength);
 421        }
 422
 423        /* Setup the initialization block */
 424
 425        /* Setup rx descriptor pointer */
 426        leptr = libdesc_offset(brx_ring, 0);
 427        sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
 428                    &ib->rx_len);
 429        sbus_writew(leptr, &ib->rx_ptr);
 430
 431        /* Setup tx descriptor pointer */
 432        leptr = libdesc_offset(btx_ring, 0);
 433        sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
 434                    &ib->tx_len);
 435        sbus_writew(leptr, &ib->tx_ptr);
 436}
 437
 438static void init_restart_ledma(struct lance_private *lp)
 439{
 440        u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 441
 442        if (!(csr & DMA_HNDL_ERROR)) {
 443                /* E-Cache draining */
 444                while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
 445                        barrier();
 446        }
 447
 448        csr = sbus_readl(lp->dregs + DMA_CSR);
 449        csr &= ~DMA_E_BURSTS;
 450        if (lp->burst_sizes & DMA_BURST32)
 451                csr |= DMA_E_BURST32;
 452        else
 453                csr |= DMA_E_BURST16;
 454
 455        csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
 456
 457        if (lp->tpe)
 458                csr |= DMA_EN_ENETAUI;
 459        else
 460                csr &= ~DMA_EN_ENETAUI;
 461        udelay(20);
 462        sbus_writel(csr, lp->dregs + DMA_CSR);
 463        udelay(200);
 464}
 465
 466static int init_restart_lance(struct lance_private *lp)
 467{
 468        u16 regval = 0;
 469        int i;
 470
 471        if (lp->dregs)
 472                init_restart_ledma(lp);
 473
 474        sbus_writew(LE_CSR0,    lp->lregs + RAP);
 475        sbus_writew(LE_C0_INIT, lp->lregs + RDP);
 476
 477        /* Wait for the lance to complete initialization */
 478        for (i = 0; i < 100; i++) {
 479                regval = sbus_readw(lp->lregs + RDP);
 480
 481                if (regval & (LE_C0_ERR | LE_C0_IDON))
 482                        break;
 483                barrier();
 484        }
 485        if (i == 100 || (regval & LE_C0_ERR)) {
 486                printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
 487                       i, regval);
 488                if (lp->dregs)
 489                        printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
 490                return -1;
 491        }
 492
 493        /* Clear IDON by writing a "1", enable interrupts and start lance */
 494        sbus_writew(LE_C0_IDON,                 lp->lregs + RDP);
 495        sbus_writew(LE_C0_INEA | LE_C0_STRT,    lp->lregs + RDP);
 496
 497        if (lp->dregs) {
 498                u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 499
 500                csr |= DMA_INT_ENAB;
 501                sbus_writel(csr, lp->dregs + DMA_CSR);
 502        }
 503
 504        return 0;
 505}
 506
 507static void lance_rx_dvma(struct net_device *dev)
 508{
 509        struct lance_private *lp = netdev_priv(dev);
 510        struct lance_init_block *ib = lp->init_block_mem;
 511        struct lance_rx_desc *rd;
 512        u8 bits;
 513        int len, entry = lp->rx_new;
 514        struct sk_buff *skb;
 515
 516        for (rd = &ib->brx_ring [entry];
 517             !((bits = rd->rmd1_bits) & LE_R1_OWN);
 518             rd = &ib->brx_ring [entry]) {
 519
 520                /* We got an incomplete frame? */
 521                if ((bits & LE_R1_POK) != LE_R1_POK) {
 522                        dev->stats.rx_over_errors++;
 523                        dev->stats.rx_errors++;
 524                } else if (bits & LE_R1_ERR) {
 525                        /* Count only the end frame as a rx error,
 526                         * not the beginning
 527                         */
 528                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 529                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 530                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 531                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 532                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 533                } else {
 534                        len = (rd->mblength & 0xfff) - 4;
 535                        skb = netdev_alloc_skb(dev, len + 2);
 536
 537                        if (skb == NULL) {
 538                                dev->stats.rx_dropped++;
 539                                rd->mblength = 0;
 540                                rd->rmd1_bits = LE_R1_OWN;
 541                                lp->rx_new = RX_NEXT(entry);
 542                                return;
 543                        }
 544
 545                        dev->stats.rx_bytes += len;
 546
 547                        skb_reserve(skb, 2);            /* 16 byte align */
 548                        skb_put(skb, len);              /* make room */
 549                        skb_copy_to_linear_data(skb,
 550                                         (unsigned char *)&(ib->rx_buf [entry][0]),
 551                                         len);
 552                        skb->protocol = eth_type_trans(skb, dev);
 553                        netif_rx(skb);
 554                        dev->stats.rx_packets++;
 555                }
 556
 557                /* Return the packet to the pool */
 558                rd->mblength = 0;
 559                rd->rmd1_bits = LE_R1_OWN;
 560                entry = RX_NEXT(entry);
 561        }
 562
 563        lp->rx_new = entry;
 564}
 565
 566static void lance_tx_dvma(struct net_device *dev)
 567{
 568        struct lance_private *lp = netdev_priv(dev);
 569        struct lance_init_block *ib = lp->init_block_mem;
 570        int i, j;
 571
 572        spin_lock(&lp->lock);
 573
 574        j = lp->tx_old;
 575        for (i = j; i != lp->tx_new; i = j) {
 576                struct lance_tx_desc *td = &ib->btx_ring [i];
 577                u8 bits = td->tmd1_bits;
 578
 579                /* If we hit a packet not owned by us, stop */
 580                if (bits & LE_T1_OWN)
 581                        break;
 582
 583                if (bits & LE_T1_ERR) {
 584                        u16 status = td->misc;
 585
 586                        dev->stats.tx_errors++;
 587                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 588                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 589
 590                        if (status & LE_T3_CLOS) {
 591                                dev->stats.tx_carrier_errors++;
 592                                if (lp->auto_select) {
 593                                        lp->tpe = 1 - lp->tpe;
 594                                        printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 595                                               dev->name, lp->tpe?"TPE":"AUI");
 596                                        STOP_LANCE(lp);
 597                                        lp->init_ring(dev);
 598                                        load_csrs(lp);
 599                                        init_restart_lance(lp);
 600                                        goto out;
 601                                }
 602                        }
 603
 604                        /* Buffer errors and underflows turn off the
 605                         * transmitter, restart the adapter.
 606                         */
 607                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 608                                dev->stats.tx_fifo_errors++;
 609
 610                                printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 611                                       dev->name);
 612                                STOP_LANCE(lp);
 613                                lp->init_ring(dev);
 614                                load_csrs(lp);
 615                                init_restart_lance(lp);
 616                                goto out;
 617                        }
 618                } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 619                        /*
 620                         * So we don't count the packet more than once.
 621                         */
 622                        td->tmd1_bits = bits & ~(LE_T1_POK);
 623
 624                        /* One collision before packet was sent. */
 625                        if (bits & LE_T1_EONE)
 626                                dev->stats.collisions++;
 627
 628                        /* More than one collision, be optimistic. */
 629                        if (bits & LE_T1_EMORE)
 630                                dev->stats.collisions += 2;
 631
 632                        dev->stats.tx_packets++;
 633                }
 634
 635                j = TX_NEXT(j);
 636        }
 637        lp->tx_old = j;
 638out:
 639        if (netif_queue_stopped(dev) &&
 640            TX_BUFFS_AVAIL > 0)
 641                netif_wake_queue(dev);
 642
 643        spin_unlock(&lp->lock);
 644}
 645
 646static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
 647{
 648        u16 *p16 = (u16 *) skb->data;
 649        u32 *p32;
 650        u8 *p8;
 651        void __iomem *pbuf = piobuf;
 652
 653        /* We know here that both src and dest are on a 16bit boundary. */
 654        *p16++ = sbus_readw(pbuf);
 655        p32 = (u32 *) p16;
 656        pbuf += 2;
 657        len -= 2;
 658
 659        while (len >= 4) {
 660                *p32++ = sbus_readl(pbuf);
 661                pbuf += 4;
 662                len -= 4;
 663        }
 664        p8 = (u8 *) p32;
 665        if (len >= 2) {
 666                p16 = (u16 *) p32;
 667                *p16++ = sbus_readw(pbuf);
 668                pbuf += 2;
 669                len -= 2;
 670                p8 = (u8 *) p16;
 671        }
 672        if (len >= 1)
 673                *p8 = sbus_readb(pbuf);
 674}
 675
 676static void lance_rx_pio(struct net_device *dev)
 677{
 678        struct lance_private *lp = netdev_priv(dev);
 679        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 680        struct lance_rx_desc __iomem *rd;
 681        unsigned char bits;
 682        int len, entry;
 683        struct sk_buff *skb;
 684
 685        entry = lp->rx_new;
 686        for (rd = &ib->brx_ring [entry];
 687             !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
 688             rd = &ib->brx_ring [entry]) {
 689
 690                /* We got an incomplete frame? */
 691                if ((bits & LE_R1_POK) != LE_R1_POK) {
 692                        dev->stats.rx_over_errors++;
 693                        dev->stats.rx_errors++;
 694                } else if (bits & LE_R1_ERR) {
 695                        /* Count only the end frame as a rx error,
 696                         * not the beginning
 697                         */
 698                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 699                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 700                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 701                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 702                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 703                } else {
 704                        len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
 705                        skb = netdev_alloc_skb(dev, len + 2);
 706
 707                        if (skb == NULL) {
 708                                dev->stats.rx_dropped++;
 709                                sbus_writew(0, &rd->mblength);
 710                                sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 711                                lp->rx_new = RX_NEXT(entry);
 712                                return;
 713                        }
 714
 715                        dev->stats.rx_bytes += len;
 716
 717                        skb_reserve (skb, 2);           /* 16 byte align */
 718                        skb_put(skb, len);              /* make room */
 719                        lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
 720                        skb->protocol = eth_type_trans(skb, dev);
 721                        netif_rx(skb);
 722                        dev->stats.rx_packets++;
 723                }
 724
 725                /* Return the packet to the pool */
 726                sbus_writew(0, &rd->mblength);
 727                sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 728                entry = RX_NEXT(entry);
 729        }
 730
 731        lp->rx_new = entry;
 732}
 733
 734static void lance_tx_pio(struct net_device *dev)
 735{
 736        struct lance_private *lp = netdev_priv(dev);
 737        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 738        int i, j;
 739
 740        spin_lock(&lp->lock);
 741
 742        j = lp->tx_old;
 743        for (i = j; i != lp->tx_new; i = j) {
 744                struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
 745                u8 bits = sbus_readb(&td->tmd1_bits);
 746
 747                /* If we hit a packet not owned by us, stop */
 748                if (bits & LE_T1_OWN)
 749                        break;
 750
 751                if (bits & LE_T1_ERR) {
 752                        u16 status = sbus_readw(&td->misc);
 753
 754                        dev->stats.tx_errors++;
 755                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 756                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 757
 758                        if (status & LE_T3_CLOS) {
 759                                dev->stats.tx_carrier_errors++;
 760                                if (lp->auto_select) {
 761                                        lp->tpe = 1 - lp->tpe;
 762                                        printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 763                                               dev->name, lp->tpe?"TPE":"AUI");
 764                                        STOP_LANCE(lp);
 765                                        lp->init_ring(dev);
 766                                        load_csrs(lp);
 767                                        init_restart_lance(lp);
 768                                        goto out;
 769                                }
 770                        }
 771
 772                        /* Buffer errors and underflows turn off the
 773                         * transmitter, restart the adapter.
 774                         */
 775                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 776                                dev->stats.tx_fifo_errors++;
 777
 778                                printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 779                                       dev->name);
 780                                STOP_LANCE(lp);
 781                                lp->init_ring(dev);
 782                                load_csrs(lp);
 783                                init_restart_lance(lp);
 784                                goto out;
 785                        }
 786                } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 787                        /*
 788                         * So we don't count the packet more than once.
 789                         */
 790                        sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
 791
 792                        /* One collision before packet was sent. */
 793                        if (bits & LE_T1_EONE)
 794                                dev->stats.collisions++;
 795
 796                        /* More than one collision, be optimistic. */
 797                        if (bits & LE_T1_EMORE)
 798                                dev->stats.collisions += 2;
 799
 800                        dev->stats.tx_packets++;
 801                }
 802
 803                j = TX_NEXT(j);
 804        }
 805        lp->tx_old = j;
 806
 807        if (netif_queue_stopped(dev) &&
 808            TX_BUFFS_AVAIL > 0)
 809                netif_wake_queue(dev);
 810out:
 811        spin_unlock(&lp->lock);
 812}
 813
 814static irqreturn_t lance_interrupt(int irq, void *dev_id)
 815{
 816        struct net_device *dev = dev_id;
 817        struct lance_private *lp = netdev_priv(dev);
 818        int csr0;
 819
 820        sbus_writew(LE_CSR0, lp->lregs + RAP);
 821        csr0 = sbus_readw(lp->lregs + RDP);
 822
 823        /* Acknowledge all the interrupt sources ASAP */
 824        sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
 825                    lp->lregs + RDP);
 826
 827        if ((csr0 & LE_C0_ERR) != 0) {
 828                /* Clear the error condition */
 829                sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
 830                             LE_C0_CERR | LE_C0_MERR),
 831                            lp->lregs + RDP);
 832        }
 833
 834        if (csr0 & LE_C0_RINT)
 835                lp->rx(dev);
 836
 837        if (csr0 & LE_C0_TINT)
 838                lp->tx(dev);
 839
 840        if (csr0 & LE_C0_BABL)
 841                dev->stats.tx_errors++;
 842
 843        if (csr0 & LE_C0_MISS)
 844                dev->stats.rx_errors++;
 845
 846        if (csr0 & LE_C0_MERR) {
 847                if (lp->dregs) {
 848                        u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
 849
 850                        printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
 851                               dev->name, csr0, addr & 0xffffff);
 852                } else {
 853                        printk(KERN_ERR "%s: Memory error, status %04x\n",
 854                               dev->name, csr0);
 855                }
 856
 857                sbus_writew(LE_C0_STOP, lp->lregs + RDP);
 858
 859                if (lp->dregs) {
 860                        u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
 861
 862                        dma_csr |= DMA_FIFO_INV;
 863                        sbus_writel(dma_csr, lp->dregs + DMA_CSR);
 864                }
 865
 866                lp->init_ring(dev);
 867                load_csrs(lp);
 868                init_restart_lance(lp);
 869                netif_wake_queue(dev);
 870        }
 871
 872        sbus_writew(LE_C0_INEA, lp->lregs + RDP);
 873
 874        return IRQ_HANDLED;
 875}
 876
 877/* Build a fake network packet and send it to ourselves. */
 878static void build_fake_packet(struct lance_private *lp)
 879{
 880        struct net_device *dev = lp->dev;
 881        int i, entry;
 882
 883        entry = lp->tx_new & TX_RING_MOD_MASK;
 884        if (lp->pio_buffer) {
 885                struct lance_init_block __iomem *ib = lp->init_block_iomem;
 886                u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
 887                struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
 888                for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
 889                        sbus_writew(0, &packet[i]);
 890                for (i = 0; i < 6; i++) {
 891                        sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
 892                        sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
 893                }
 894                sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
 895                sbus_writew(0, &ib->btx_ring[entry].misc);
 896                sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
 897        } else {
 898                struct lance_init_block *ib = lp->init_block_mem;
 899                u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
 900                struct ethhdr *eth = (struct ethhdr *) packet;
 901                memset(packet, 0, ETH_ZLEN);
 902                for (i = 0; i < 6; i++) {
 903                        eth->h_dest[i] = dev->dev_addr[i];
 904                        eth->h_source[i] = dev->dev_addr[i];
 905                }
 906                ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
 907                ib->btx_ring[entry].misc = 0;
 908                ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 909        }
 910        lp->tx_new = TX_NEXT(entry);
 911}
 912
 913static int lance_open(struct net_device *dev)
 914{
 915        struct lance_private *lp = netdev_priv(dev);
 916        int status = 0;
 917
 918        STOP_LANCE(lp);
 919
 920        if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
 921                        lancestr, (void *) dev)) {
 922                printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
 923                return -EAGAIN;
 924        }
 925
 926        /* On the 4m, setup the ledma to provide the upper bits for buffers */
 927        if (lp->dregs) {
 928                u32 regval = lp->init_block_dvma & 0xff000000;
 929
 930                sbus_writel(regval, lp->dregs + DMA_TEST);
 931        }
 932
 933        /* Set mode and clear multicast filter only at device open,
 934         * so that lance_init_ring() called at any error will not
 935         * forget multicast filters.
 936         *
 937         * BTW it is common bug in all lance drivers! --ANK
 938         */
 939        if (lp->pio_buffer) {
 940                struct lance_init_block __iomem *ib = lp->init_block_iomem;
 941                sbus_writew(0, &ib->mode);
 942                sbus_writel(0, &ib->filter[0]);
 943                sbus_writel(0, &ib->filter[1]);
 944        } else {
 945                struct lance_init_block *ib = lp->init_block_mem;
 946                ib->mode = 0;
 947                ib->filter [0] = 0;
 948                ib->filter [1] = 0;
 949        }
 950
 951        lp->init_ring(dev);
 952        load_csrs(lp);
 953
 954        netif_start_queue(dev);
 955
 956        status = init_restart_lance(lp);
 957        if (!status && lp->auto_select) {
 958                build_fake_packet(lp);
 959                sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
 960        }
 961
 962        return status;
 963}
 964
 965static int lance_close(struct net_device *dev)
 966{
 967        struct lance_private *lp = netdev_priv(dev);
 968
 969        netif_stop_queue(dev);
 970        del_timer_sync(&lp->multicast_timer);
 971
 972        STOP_LANCE(lp);
 973
 974        free_irq(dev->irq, (void *) dev);
 975        return 0;
 976}
 977
 978static int lance_reset(struct net_device *dev)
 979{
 980        struct lance_private *lp = netdev_priv(dev);
 981        int status;
 982
 983        STOP_LANCE(lp);
 984
 985        /* On the 4m, reset the dma too */
 986        if (lp->dregs) {
 987                u32 csr, addr;
 988
 989                printk(KERN_ERR "resetting ledma\n");
 990                csr = sbus_readl(lp->dregs + DMA_CSR);
 991                sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
 992                udelay(200);
 993                sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
 994
 995                addr = lp->init_block_dvma & 0xff000000;
 996                sbus_writel(addr, lp->dregs + DMA_TEST);
 997        }
 998        lp->init_ring(dev);
 999        load_csrs(lp);
1000        netif_trans_update(dev); /* prevent tx timeout */
1001        status = init_restart_lance(lp);
1002        return status;
1003}
1004
1005static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1006{
1007        void __iomem *piobuf = dest;
1008        u32 *p32;
1009        u16 *p16;
1010        u8 *p8;
1011
1012        switch ((unsigned long)src & 0x3) {
1013        case 0:
1014                p32 = (u32 *) src;
1015                while (len >= 4) {
1016                        sbus_writel(*p32, piobuf);
1017                        p32++;
1018                        piobuf += 4;
1019                        len -= 4;
1020                }
1021                src = (char *) p32;
1022                break;
1023        case 1:
1024        case 3:
1025                p8 = (u8 *) src;
1026                while (len >= 4) {
1027                        u32 val;
1028
1029                        val  = p8[0] << 24;
1030                        val |= p8[1] << 16;
1031                        val |= p8[2] << 8;
1032                        val |= p8[3];
1033                        sbus_writel(val, piobuf);
1034                        p8 += 4;
1035                        piobuf += 4;
1036                        len -= 4;
1037                }
1038                src = (char *) p8;
1039                break;
1040        case 2:
1041                p16 = (u16 *) src;
1042                while (len >= 4) {
1043                        u32 val = p16[0]<<16 | p16[1];
1044                        sbus_writel(val, piobuf);
1045                        p16 += 2;
1046                        piobuf += 4;
1047                        len -= 4;
1048                }
1049                src = (char *) p16;
1050                break;
1051        }
1052        if (len >= 2) {
1053                u16 val = src[0] << 8 | src[1];
1054                sbus_writew(val, piobuf);
1055                src += 2;
1056                piobuf += 2;
1057                len -= 2;
1058        }
1059        if (len >= 1)
1060                sbus_writeb(src[0], piobuf);
1061}
1062
1063static void lance_piozero(void __iomem *dest, int len)
1064{
1065        void __iomem *piobuf = dest;
1066
1067        if ((unsigned long)piobuf & 1) {
1068                sbus_writeb(0, piobuf);
1069                piobuf += 1;
1070                len -= 1;
1071                if (len == 0)
1072                        return;
1073        }
1074        if (len == 1) {
1075                sbus_writeb(0, piobuf);
1076                return;
1077        }
1078        if ((unsigned long)piobuf & 2) {
1079                sbus_writew(0, piobuf);
1080                piobuf += 2;
1081                len -= 2;
1082                if (len == 0)
1083                        return;
1084        }
1085        while (len >= 4) {
1086                sbus_writel(0, piobuf);
1087                piobuf += 4;
1088                len -= 4;
1089        }
1090        if (len >= 2) {
1091                sbus_writew(0, piobuf);
1092                piobuf += 2;
1093                len -= 2;
1094        }
1095        if (len >= 1)
1096                sbus_writeb(0, piobuf);
1097}
1098
1099static void lance_tx_timeout(struct net_device *dev)
1100{
1101        struct lance_private *lp = netdev_priv(dev);
1102
1103        printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1104               dev->name, sbus_readw(lp->lregs + RDP));
1105        lance_reset(dev);
1106        netif_wake_queue(dev);
1107}
1108
1109static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1110{
1111        struct lance_private *lp = netdev_priv(dev);
1112        int entry, skblen, len;
1113
1114        skblen = skb->len;
1115
1116        len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1117
1118        spin_lock_irq(&lp->lock);
1119
1120        dev->stats.tx_bytes += len;
1121
1122        entry = lp->tx_new & TX_RING_MOD_MASK;
1123        if (lp->pio_buffer) {
1124                struct lance_init_block __iomem *ib = lp->init_block_iomem;
1125                sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1126                sbus_writew(0, &ib->btx_ring[entry].misc);
1127                lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1128                if (len != skblen)
1129                        lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1130                sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1131        } else {
1132                struct lance_init_block *ib = lp->init_block_mem;
1133                ib->btx_ring [entry].length = (-len) | 0xf000;
1134                ib->btx_ring [entry].misc = 0;
1135                skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1136                if (len != skblen)
1137                        memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1138                ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1139        }
1140
1141        lp->tx_new = TX_NEXT(entry);
1142
1143        if (TX_BUFFS_AVAIL <= 0)
1144                netif_stop_queue(dev);
1145
1146        /* Kick the lance: transmit now */
1147        sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1148
1149        /* Read back CSR to invalidate the E-Cache.
1150         * This is needed, because DMA_DSBL_WR_INV is set.
1151         */
1152        if (lp->dregs)
1153                sbus_readw(lp->lregs + RDP);
1154
1155        spin_unlock_irq(&lp->lock);
1156
1157        dev_kfree_skb(skb);
1158
1159        return NETDEV_TX_OK;
1160}
1161
1162/* taken from the depca driver */
1163static void lance_load_multicast(struct net_device *dev)
1164{
1165        struct lance_private *lp = netdev_priv(dev);
1166        struct netdev_hw_addr *ha;
1167        u32 crc;
1168        u32 val;
1169
1170        /* set all multicast bits */
1171        if (dev->flags & IFF_ALLMULTI)
1172                val = ~0;
1173        else
1174                val = 0;
1175
1176        if (lp->pio_buffer) {
1177                struct lance_init_block __iomem *ib = lp->init_block_iomem;
1178                sbus_writel(val, &ib->filter[0]);
1179                sbus_writel(val, &ib->filter[1]);
1180        } else {
1181                struct lance_init_block *ib = lp->init_block_mem;
1182                ib->filter [0] = val;
1183                ib->filter [1] = val;
1184        }
1185
1186        if (dev->flags & IFF_ALLMULTI)
1187                return;
1188
1189        /* Add addresses */
1190        netdev_for_each_mc_addr(ha, dev) {
1191                crc = ether_crc_le(6, ha->addr);
1192                crc = crc >> 26;
1193                if (lp->pio_buffer) {
1194                        struct lance_init_block __iomem *ib = lp->init_block_iomem;
1195                        u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1196                        u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1197                        tmp |= 1 << (crc & 0xf);
1198                        sbus_writew(tmp, &mcast_table[crc>>4]);
1199                } else {
1200                        struct lance_init_block *ib = lp->init_block_mem;
1201                        u16 *mcast_table = (u16 *) &ib->filter;
1202                        mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1203                }
1204        }
1205}
1206
1207static void lance_set_multicast(struct net_device *dev)
1208{
1209        struct lance_private *lp = netdev_priv(dev);
1210        struct lance_init_block *ib_mem = lp->init_block_mem;
1211        struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1212        u16 mode;
1213
1214        if (!netif_running(dev))
1215                return;
1216
1217        if (lp->tx_old != lp->tx_new) {
1218                mod_timer(&lp->multicast_timer, jiffies + 4);
1219                netif_wake_queue(dev);
1220                return;
1221        }
1222
1223        netif_stop_queue(dev);
1224
1225        STOP_LANCE(lp);
1226        lp->init_ring(dev);
1227
1228        if (lp->pio_buffer)
1229                mode = sbus_readw(&ib_iomem->mode);
1230        else
1231                mode = ib_mem->mode;
1232        if (dev->flags & IFF_PROMISC) {
1233                mode |= LE_MO_PROM;
1234                if (lp->pio_buffer)
1235                        sbus_writew(mode, &ib_iomem->mode);
1236                else
1237                        ib_mem->mode = mode;
1238        } else {
1239                mode &= ~LE_MO_PROM;
1240                if (lp->pio_buffer)
1241                        sbus_writew(mode, &ib_iomem->mode);
1242                else
1243                        ib_mem->mode = mode;
1244                lance_load_multicast(dev);
1245        }
1246        load_csrs(lp);
1247        init_restart_lance(lp);
1248        netif_wake_queue(dev);
1249}
1250
1251static void lance_set_multicast_retry(unsigned long _opaque)
1252{
1253        struct net_device *dev = (struct net_device *) _opaque;
1254
1255        lance_set_multicast(dev);
1256}
1257
1258static void lance_free_hwresources(struct lance_private *lp)
1259{
1260        if (lp->lregs)
1261                of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1262        if (lp->dregs) {
1263                struct platform_device *ledma = lp->ledma;
1264
1265                of_iounmap(&ledma->resource[0], lp->dregs,
1266                           resource_size(&ledma->resource[0]));
1267        }
1268        if (lp->init_block_iomem) {
1269                of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1270                           sizeof(struct lance_init_block));
1271        } else if (lp->init_block_mem) {
1272                dma_free_coherent(&lp->op->dev,
1273                                  sizeof(struct lance_init_block),
1274                                  lp->init_block_mem,
1275                                  lp->init_block_dvma);
1276        }
1277}
1278
1279/* Ethtool support... */
1280static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1281{
1282        strlcpy(info->driver, "sunlance", sizeof(info->driver));
1283        strlcpy(info->version, "2.02", sizeof(info->version));
1284}
1285
1286static const struct ethtool_ops sparc_lance_ethtool_ops = {
1287        .get_drvinfo            = sparc_lance_get_drvinfo,
1288        .get_link               = ethtool_op_get_link,
1289};
1290
1291static const struct net_device_ops sparc_lance_ops = {
1292        .ndo_open               = lance_open,
1293        .ndo_stop               = lance_close,
1294        .ndo_start_xmit         = lance_start_xmit,
1295        .ndo_set_rx_mode        = lance_set_multicast,
1296        .ndo_tx_timeout         = lance_tx_timeout,
1297        .ndo_set_mac_address    = eth_mac_addr,
1298        .ndo_validate_addr      = eth_validate_addr,
1299};
1300
1301static int sparc_lance_probe_one(struct platform_device *op,
1302                                 struct platform_device *ledma,
1303                                 struct platform_device *lebuffer)
1304{
1305        struct device_node *dp = op->dev.of_node;
1306        static unsigned version_printed;
1307        struct lance_private *lp;
1308        struct net_device *dev;
1309        int    i;
1310
1311        dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1312        if (!dev)
1313                return -ENOMEM;
1314
1315        lp = netdev_priv(dev);
1316
1317        if (sparc_lance_debug && version_printed++ == 0)
1318                printk (KERN_INFO "%s", version);
1319
1320        spin_lock_init(&lp->lock);
1321
1322        /* Copy the IDPROM ethernet address to the device structure, later we
1323         * will copy the address in the device structure to the lance
1324         * initialization block.
1325         */
1326        for (i = 0; i < 6; i++)
1327                dev->dev_addr[i] = idprom->id_ethaddr[i];
1328
1329        /* Get the IO region */
1330        lp->lregs = of_ioremap(&op->resource[0], 0,
1331                               LANCE_REG_SIZE, lancestr);
1332        if (!lp->lregs) {
1333                printk(KERN_ERR "SunLance: Cannot map registers.\n");
1334                goto fail;
1335        }
1336
1337        lp->ledma = ledma;
1338        if (lp->ledma) {
1339                lp->dregs = of_ioremap(&ledma->resource[0], 0,
1340                                       resource_size(&ledma->resource[0]),
1341                                       "ledma");
1342                if (!lp->dregs) {
1343                        printk(KERN_ERR "SunLance: Cannot map "
1344                               "ledma registers.\n");
1345                        goto fail;
1346                }
1347        }
1348
1349        lp->op = op;
1350        lp->lebuffer = lebuffer;
1351        if (lebuffer) {
1352                /* sanity check */
1353                if (lebuffer->resource[0].start & 7) {
1354                        printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1355                        goto fail;
1356                }
1357                lp->init_block_iomem =
1358                        of_ioremap(&lebuffer->resource[0], 0,
1359                                   sizeof(struct lance_init_block), "lebuffer");
1360                if (!lp->init_block_iomem) {
1361                        printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1362                        goto fail;
1363                }
1364                lp->init_block_dvma = 0;
1365                lp->pio_buffer = 1;
1366                lp->init_ring = lance_init_ring_pio;
1367                lp->rx = lance_rx_pio;
1368                lp->tx = lance_tx_pio;
1369        } else {
1370                lp->init_block_mem =
1371                        dma_alloc_coherent(&op->dev,
1372                                           sizeof(struct lance_init_block),
1373                                           &lp->init_block_dvma, GFP_ATOMIC);
1374                if (!lp->init_block_mem)
1375                        goto fail;
1376
1377                lp->pio_buffer = 0;
1378                lp->init_ring = lance_init_ring_dvma;
1379                lp->rx = lance_rx_dvma;
1380                lp->tx = lance_tx_dvma;
1381        }
1382        lp->busmaster_regval = of_getintprop_default(dp,  "busmaster-regval",
1383                                                     (LE_C3_BSWP |
1384                                                      LE_C3_ACON |
1385                                                      LE_C3_BCON));
1386
1387        lp->name = lancestr;
1388
1389        lp->burst_sizes = 0;
1390        if (lp->ledma) {
1391                struct device_node *ledma_dp = ledma->dev.of_node;
1392                struct device_node *sbus_dp;
1393                unsigned int sbmask;
1394                const char *prop;
1395                u32 csr;
1396
1397                /* Find burst-size property for ledma */
1398                lp->burst_sizes = of_getintprop_default(ledma_dp,
1399                                                        "burst-sizes", 0);
1400
1401                /* ledma may be capable of fast bursts, but sbus may not. */
1402                sbus_dp = ledma_dp->parent;
1403                sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1404                                               DMA_BURSTBITS);
1405                lp->burst_sizes &= sbmask;
1406
1407                /* Get the cable-selection property */
1408                prop = of_get_property(ledma_dp, "cable-selection", NULL);
1409                if (!prop || prop[0] == '\0') {
1410                        struct device_node *nd;
1411
1412                        printk(KERN_INFO "SunLance: using "
1413                               "auto-carrier-detection.\n");
1414
1415                        nd = of_find_node_by_path("/options");
1416                        if (!nd)
1417                                goto no_link_test;
1418
1419                        prop = of_get_property(nd, "tpe-link-test?", NULL);
1420                        if (!prop)
1421                                goto no_link_test;
1422
1423                        if (strcmp(prop, "true")) {
1424                                printk(KERN_NOTICE "SunLance: warning: overriding option "
1425                                       "'tpe-link-test?'\n");
1426                                printk(KERN_NOTICE "SunLance: warning: mail any problems "
1427                                       "to ecd@skynet.be\n");
1428                                auxio_set_lte(AUXIO_LTE_ON);
1429                        }
1430no_link_test:
1431                        lp->auto_select = 1;
1432                        lp->tpe = 0;
1433                } else if (!strcmp(prop, "aui")) {
1434                        lp->auto_select = 0;
1435                        lp->tpe = 0;
1436                } else {
1437                        lp->auto_select = 0;
1438                        lp->tpe = 1;
1439                }
1440
1441                /* Reset ledma */
1442                csr = sbus_readl(lp->dregs + DMA_CSR);
1443                sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1444                udelay(200);
1445                sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1446        } else
1447                lp->dregs = NULL;
1448
1449        lp->dev = dev;
1450        SET_NETDEV_DEV(dev, &op->dev);
1451        dev->watchdog_timeo = 5*HZ;
1452        dev->ethtool_ops = &sparc_lance_ethtool_ops;
1453        dev->netdev_ops = &sparc_lance_ops;
1454
1455        dev->irq = op->archdata.irqs[0];
1456
1457        /* We cannot sleep if the chip is busy during a
1458         * multicast list update event, because such events
1459         * can occur from interrupts (ex. IPv6).  So we
1460         * use a timer to try again later when necessary. -DaveM
1461         */
1462        init_timer(&lp->multicast_timer);
1463        lp->multicast_timer.data = (unsigned long) dev;
1464        lp->multicast_timer.function = lance_set_multicast_retry;
1465
1466        if (register_netdev(dev)) {
1467                printk(KERN_ERR "SunLance: Cannot register device.\n");
1468                goto fail;
1469        }
1470
1471        platform_set_drvdata(op, lp);
1472
1473        printk(KERN_INFO "%s: LANCE %pM\n",
1474               dev->name, dev->dev_addr);
1475
1476        return 0;
1477
1478fail:
1479        lance_free_hwresources(lp);
1480        free_netdev(dev);
1481        return -ENODEV;
1482}
1483
1484static int sunlance_sbus_probe(struct platform_device *op)
1485{
1486        struct platform_device *parent = to_platform_device(op->dev.parent);
1487        struct device_node *parent_dp = parent->dev.of_node;
1488        int err;
1489
1490        if (!strcmp(parent_dp->name, "ledma")) {
1491                err = sparc_lance_probe_one(op, parent, NULL);
1492        } else if (!strcmp(parent_dp->name, "lebuffer")) {
1493                err = sparc_lance_probe_one(op, NULL, parent);
1494        } else
1495                err = sparc_lance_probe_one(op, NULL, NULL);
1496
1497        return err;
1498}
1499
1500static int sunlance_sbus_remove(struct platform_device *op)
1501{
1502        struct lance_private *lp = platform_get_drvdata(op);
1503        struct net_device *net_dev = lp->dev;
1504
1505        unregister_netdev(net_dev);
1506
1507        lance_free_hwresources(lp);
1508
1509        free_netdev(net_dev);
1510
1511        return 0;
1512}
1513
1514static const struct of_device_id sunlance_sbus_match[] = {
1515        {
1516                .name = "le",
1517        },
1518        {},
1519};
1520
1521MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1522
1523static struct platform_driver sunlance_sbus_driver = {
1524        .driver = {
1525                .name = "sunlance",
1526                .of_match_table = sunlance_sbus_match,
1527        },
1528        .probe          = sunlance_sbus_probe,
1529        .remove         = sunlance_sbus_remove,
1530};
1531
1532module_platform_driver(sunlance_sbus_driver);
1533