linux/drivers/net/ethernet/amd/sunlance.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
   3 * lance.c: Linux/Sparc/Lance driver
   4 *
   5 *      Written 1995, 1996 by Miguel de Icaza
   6 * Sources:
   7 *      The Linux  depca driver
   8 *      The Linux  lance driver.
   9 *      The Linux  skeleton driver.
  10 *      The NetBSD Sparc/Lance driver.
  11 *      Theo de Raadt (deraadt@openbsd.org)
  12 *      NCR92C990 Lan Controller manual
  13 *
  14 * 1.4:
  15 *      Added support to run with a ledma on the Sun4m
  16 *
  17 * 1.5:
  18 *      Added multiple card detection.
  19 *
  20 *       4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
  21 *                (ecd@skynet.be)
  22 *
  23 *       5/15/96: auto carrier detection on sun4m by Eddie C. Dost
  24 *                (ecd@skynet.be)
  25 *
  26 *       5/17/96: lebuffer on scsi/ether cards now work David S. Miller
  27 *                (davem@caip.rutgers.edu)
  28 *
  29 *       5/29/96: override option 'tpe-link-test?', if it is 'false', as
  30 *                this disables auto carrier detection on sun4m. Eddie C. Dost
  31 *                (ecd@skynet.be)
  32 *
  33 * 1.7:
  34 *       6/26/96: Bug fix for multiple ledmas, miguel.
  35 *
  36 * 1.8:
  37 *                Stole multicast code from depca.c, fixed lance_tx.
  38 *
  39 * 1.9:
  40 *       8/21/96: Fixed the multicast code (Pedro Roque)
  41 *
  42 *       8/28/96: Send fake packet in lance_open() if auto_select is true,
  43 *                so we can detect the carrier loss condition in time.
  44 *                Eddie C. Dost (ecd@skynet.be)
  45 *
  46 *       9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
  47 *                MNA trap during chksum_partial_copy(). (ecd@skynet.be)
  48 *
  49 *      11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
  50 *
  51 *      12/22/96: Don't loop forever in lance_rx() on incomplete packets.
  52 *                This was the sun4c killer. Shit, stupid bug.
  53 *                (ecd@skynet.be)
  54 *
  55 * 1.10:
  56 *       1/26/97: Modularize driver. (ecd@skynet.be)
  57 *
  58 * 1.11:
  59 *      12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
  60 *
  61 * 1.12:
  62 *       11/3/99: Fixed SMP race in lance_start_xmit found by davem.
  63 *                Anton Blanchard (anton@progsoc.uts.edu.au)
  64 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
  65 *                David S. Miller (davem@redhat.com)
  66 * 2.01:
  67 *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
  68 *
  69 */
  70
  71#undef DEBUG_DRIVER
  72
  73static char lancestr[] = "LANCE";
  74
  75#include <linux/module.h>
  76#include <linux/kernel.h>
  77#include <linux/types.h>
  78#include <linux/fcntl.h>
  79#include <linux/interrupt.h>
  80#include <linux/ioport.h>
  81#include <linux/in.h>
  82#include <linux/string.h>
  83#include <linux/delay.h>
  84#include <linux/crc32.h>
  85#include <linux/errno.h>
  86#include <linux/socket.h> /* Used for the temporal inet entries and routing */
  87#include <linux/route.h>
  88#include <linux/netdevice.h>
  89#include <linux/etherdevice.h>
  90#include <linux/skbuff.h>
  91#include <linux/ethtool.h>
  92#include <linux/bitops.h>
  93#include <linux/dma-mapping.h>
  94#include <linux/of.h>
  95#include <linux/of_device.h>
  96#include <linux/gfp.h>
  97#include <linux/pgtable.h>
  98
  99#include <asm/io.h>
 100#include <asm/dma.h>
 101#include <asm/byteorder.h>      /* Used by the checksum routines */
 102#include <asm/idprom.h>
 103#include <asm/prom.h>
 104#include <asm/auxio.h>          /* For tpe-link-test? setting */
 105#include <asm/irq.h>
 106
 107#define DRV_NAME        "sunlance"
 108#define DRV_RELDATE     "8/24/03"
 109#define DRV_AUTHOR      "Miguel de Icaza (miguel@nuclecu.unam.mx)"
 110
 111MODULE_AUTHOR(DRV_AUTHOR);
 112MODULE_DESCRIPTION("Sun Lance ethernet driver");
 113MODULE_LICENSE("GPL");
 114
 115/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
 116#ifndef LANCE_LOG_TX_BUFFERS
 117#define LANCE_LOG_TX_BUFFERS 4
 118#define LANCE_LOG_RX_BUFFERS 4
 119#endif
 120
 121#define LE_CSR0 0
 122#define LE_CSR1 1
 123#define LE_CSR2 2
 124#define LE_CSR3 3
 125
 126#define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
 127
 128#define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
 129#define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
 130#define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
 131#define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
 132#define LE_C0_MERR      0x0800  /* ME:   Memory error */
 133#define LE_C0_RINT      0x0400  /* Received interrupt */
 134#define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
 135#define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
 136#define LE_C0_INTR      0x0080  /* Interrupt or error */
 137#define LE_C0_INEA      0x0040  /* Interrupt enable */
 138#define LE_C0_RXON      0x0020  /* Receiver on */
 139#define LE_C0_TXON      0x0010  /* Transmitter on */
 140#define LE_C0_TDMD      0x0008  /* Transmitter demand */
 141#define LE_C0_STOP      0x0004  /* Stop the card */
 142#define LE_C0_STRT      0x0002  /* Start the card */
 143#define LE_C0_INIT      0x0001  /* Init the card */
 144
 145#define LE_C3_BSWP      0x4     /* SWAP */
 146#define LE_C3_ACON      0x2     /* ALE Control */
 147#define LE_C3_BCON      0x1     /* Byte control */
 148
 149/* Receive message descriptor 1 */
 150#define LE_R1_OWN       0x80    /* Who owns the entry */
 151#define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
 152#define LE_R1_FRA       0x20    /* FRA: Frame error */
 153#define LE_R1_OFL       0x10    /* OFL: Frame overflow */
 154#define LE_R1_CRC       0x08    /* CRC error */
 155#define LE_R1_BUF       0x04    /* BUF: Buffer error */
 156#define LE_R1_SOP       0x02    /* Start of packet */
 157#define LE_R1_EOP       0x01    /* End of packet */
 158#define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */
 159
 160#define LE_T1_OWN       0x80    /* Lance owns the packet */
 161#define LE_T1_ERR       0x40    /* Error summary */
 162#define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
 163#define LE_T1_EONE      0x08    /* Error: one retry needed */
 164#define LE_T1_EDEF      0x04    /* Error: deferred */
 165#define LE_T1_SOP       0x02    /* Start of packet */
 166#define LE_T1_EOP       0x01    /* End of packet */
 167#define LE_T1_POK       0x03    /* Packet is complete: SOP + EOP */
 168
 169#define LE_T3_BUF       0x8000  /* Buffer error */
 170#define LE_T3_UFL       0x4000  /* Error underflow */
 171#define LE_T3_LCOL      0x1000  /* Error late collision */
 172#define LE_T3_CLOS      0x0800  /* Error carrier loss */
 173#define LE_T3_RTY       0x0400  /* Error retry */
 174#define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
 175
 176#define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
 177#define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
 178#define TX_RING_LEN_BITS                ((LANCE_LOG_TX_BUFFERS) << 29)
 179#define TX_NEXT(__x)                    (((__x)+1) & TX_RING_MOD_MASK)
 180
 181#define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
 182#define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
 183#define RX_RING_LEN_BITS                ((LANCE_LOG_RX_BUFFERS) << 29)
 184#define RX_NEXT(__x)                    (((__x)+1) & RX_RING_MOD_MASK)
 185
 186#define PKT_BUF_SZ              1544
 187#define RX_BUFF_SIZE            PKT_BUF_SZ
 188#define TX_BUFF_SIZE            PKT_BUF_SZ
 189
 190struct lance_rx_desc {
 191        u16     rmd0;           /* low address of packet */
 192        u8      rmd1_bits;      /* descriptor bits */
 193        u8      rmd1_hadr;      /* high address of packet */
 194        s16     length;         /* This length is 2s complement (negative)!
 195                                 * Buffer length
 196                                 */
 197        u16     mblength;       /* This is the actual number of bytes received */
 198};
 199
 200struct lance_tx_desc {
 201        u16     tmd0;           /* low address of packet */
 202        u8      tmd1_bits;      /* descriptor bits */
 203        u8      tmd1_hadr;      /* high address of packet */
 204        s16     length;         /* Length is 2s complement (negative)! */
 205        u16     misc;
 206};
 207
 208/* The LANCE initialization block, described in databook. */
 209/* On the Sparc, this block should be on a DMA region     */
 210struct lance_init_block {
 211        u16     mode;           /* Pre-set mode (reg. 15) */
 212        u8      phys_addr[6];   /* Physical ethernet address */
 213        u32     filter[2];      /* Multicast filter. */
 214
 215        /* Receive and transmit ring base, along with extra bits. */
 216        u16     rx_ptr;         /* receive descriptor addr */
 217        u16     rx_len;         /* receive len and high addr */
 218        u16     tx_ptr;         /* transmit descriptor addr */
 219        u16     tx_len;         /* transmit len and high addr */
 220
 221        /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
 222        struct lance_rx_desc brx_ring[RX_RING_SIZE];
 223        struct lance_tx_desc btx_ring[TX_RING_SIZE];
 224
 225        u8      tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
 226        u8      pad[2];         /* align rx_buf for copy_and_sum(). */
 227        u8      rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
 228};
 229
 230#define libdesc_offset(rt, elem) \
 231((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
 232
 233#define libbuff_offset(rt, elem) \
 234((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
 235
 236struct lance_private {
 237        void __iomem    *lregs;         /* Lance RAP/RDP regs.          */
 238        void __iomem    *dregs;         /* DMA controller regs.         */
 239        struct lance_init_block __iomem *init_block_iomem;
 240        struct lance_init_block *init_block_mem;
 241
 242        spinlock_t      lock;
 243
 244        int             rx_new, tx_new;
 245        int             rx_old, tx_old;
 246
 247        struct platform_device *ledma;  /* If set this points to ledma  */
 248        char            tpe;            /* cable-selection is TPE       */
 249        char            auto_select;    /* cable-selection by carrier   */
 250        char            burst_sizes;    /* ledma SBus burst sizes       */
 251        char            pio_buffer;     /* init block in PIO space?     */
 252
 253        unsigned short  busmaster_regval;
 254
 255        void (*init_ring)(struct net_device *);
 256        void (*rx)(struct net_device *);
 257        void (*tx)(struct net_device *);
 258
 259        char                   *name;
 260        dma_addr_t              init_block_dvma;
 261        struct net_device      *dev;              /* Backpointer        */
 262        struct platform_device       *op;
 263        struct platform_device       *lebuffer;
 264        struct timer_list       multicast_timer;
 265};
 266
 267#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 268                        lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
 269                        lp->tx_old - lp->tx_new-1)
 270
 271/* Lance registers. */
 272#define RDP             0x00UL          /* register data port           */
 273#define RAP             0x02UL          /* register address port        */
 274#define LANCE_REG_SIZE  0x04UL
 275
 276#define STOP_LANCE(__lp) \
 277do {    void __iomem *__base = (__lp)->lregs; \
 278        sbus_writew(LE_CSR0,    __base + RAP); \
 279        sbus_writew(LE_C0_STOP, __base + RDP); \
 280} while (0)
 281
 282int sparc_lance_debug = 2;
 283
 284/* The Lance uses 24 bit addresses */
 285/* On the Sun4c the DVMA will provide the remaining bytes for us */
 286/* On the Sun4m we have to instruct the ledma to provide them    */
 287/* Even worse, on scsi/ether SBUS cards, the init block and the
 288 * transmit/receive buffers are addresses as offsets from absolute
 289 * zero on the lebuffer PIO area. -DaveM
 290 */
 291
 292#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
 293
 294/* Load the CSR registers */
 295static void load_csrs(struct lance_private *lp)
 296{
 297        u32 leptr;
 298
 299        if (lp->pio_buffer)
 300                leptr = 0;
 301        else
 302                leptr = LANCE_ADDR(lp->init_block_dvma);
 303
 304        sbus_writew(LE_CSR1,              lp->lregs + RAP);
 305        sbus_writew(leptr & 0xffff,       lp->lregs + RDP);
 306        sbus_writew(LE_CSR2,              lp->lregs + RAP);
 307        sbus_writew(leptr >> 16,          lp->lregs + RDP);
 308        sbus_writew(LE_CSR3,              lp->lregs + RAP);
 309        sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
 310
 311        /* Point back to csr0 */
 312        sbus_writew(LE_CSR0, lp->lregs + RAP);
 313}
 314
 315/* Setup the Lance Rx and Tx rings */
 316static void lance_init_ring_dvma(struct net_device *dev)
 317{
 318        struct lance_private *lp = netdev_priv(dev);
 319        struct lance_init_block *ib = lp->init_block_mem;
 320        dma_addr_t aib = lp->init_block_dvma;
 321        __u32 leptr;
 322        int i;
 323
 324        /* Lock out other processes while setting up hardware */
 325        netif_stop_queue(dev);
 326        lp->rx_new = lp->tx_new = 0;
 327        lp->rx_old = lp->tx_old = 0;
 328
 329        /* Copy the ethernet address to the lance init block
 330         * Note that on the sparc you need to swap the ethernet address.
 331         */
 332        ib->phys_addr [0] = dev->dev_addr [1];
 333        ib->phys_addr [1] = dev->dev_addr [0];
 334        ib->phys_addr [2] = dev->dev_addr [3];
 335        ib->phys_addr [3] = dev->dev_addr [2];
 336        ib->phys_addr [4] = dev->dev_addr [5];
 337        ib->phys_addr [5] = dev->dev_addr [4];
 338
 339        /* Setup the Tx ring entries */
 340        for (i = 0; i < TX_RING_SIZE; i++) {
 341                leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
 342                ib->btx_ring [i].tmd0      = leptr;
 343                ib->btx_ring [i].tmd1_hadr = leptr >> 16;
 344                ib->btx_ring [i].tmd1_bits = 0;
 345                ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
 346                ib->btx_ring [i].misc      = 0;
 347        }
 348
 349        /* Setup the Rx ring entries */
 350        for (i = 0; i < RX_RING_SIZE; i++) {
 351                leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
 352
 353                ib->brx_ring [i].rmd0      = leptr;
 354                ib->brx_ring [i].rmd1_hadr = leptr >> 16;
 355                ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
 356                ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
 357                ib->brx_ring [i].mblength  = 0;
 358        }
 359
 360        /* Setup the initialization block */
 361
 362        /* Setup rx descriptor pointer */
 363        leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
 364        ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
 365        ib->rx_ptr = leptr;
 366
 367        /* Setup tx descriptor pointer */
 368        leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
 369        ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
 370        ib->tx_ptr = leptr;
 371}
 372
 373static void lance_init_ring_pio(struct net_device *dev)
 374{
 375        struct lance_private *lp = netdev_priv(dev);
 376        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 377        u32 leptr;
 378        int i;
 379
 380        /* Lock out other processes while setting up hardware */
 381        netif_stop_queue(dev);
 382        lp->rx_new = lp->tx_new = 0;
 383        lp->rx_old = lp->tx_old = 0;
 384
 385        /* Copy the ethernet address to the lance init block
 386         * Note that on the sparc you need to swap the ethernet address.
 387         */
 388        sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
 389        sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
 390        sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
 391        sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
 392        sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
 393        sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
 394
 395        /* Setup the Tx ring entries */
 396        for (i = 0; i < TX_RING_SIZE; i++) {
 397                leptr = libbuff_offset(tx_buf, i);
 398                sbus_writew(leptr,      &ib->btx_ring [i].tmd0);
 399                sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
 400                sbus_writeb(0,          &ib->btx_ring [i].tmd1_bits);
 401
 402                /* The ones required by tmd2 */
 403                sbus_writew(0xf000,     &ib->btx_ring [i].length);
 404                sbus_writew(0,          &ib->btx_ring [i].misc);
 405        }
 406
 407        /* Setup the Rx ring entries */
 408        for (i = 0; i < RX_RING_SIZE; i++) {
 409                leptr = libbuff_offset(rx_buf, i);
 410
 411                sbus_writew(leptr,      &ib->brx_ring [i].rmd0);
 412                sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
 413                sbus_writeb(LE_R1_OWN,  &ib->brx_ring [i].rmd1_bits);
 414                sbus_writew(-RX_BUFF_SIZE|0xf000,
 415                            &ib->brx_ring [i].length);
 416                sbus_writew(0,          &ib->brx_ring [i].mblength);
 417        }
 418
 419        /* Setup the initialization block */
 420
 421        /* Setup rx descriptor pointer */
 422        leptr = libdesc_offset(brx_ring, 0);
 423        sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
 424                    &ib->rx_len);
 425        sbus_writew(leptr, &ib->rx_ptr);
 426
 427        /* Setup tx descriptor pointer */
 428        leptr = libdesc_offset(btx_ring, 0);
 429        sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
 430                    &ib->tx_len);
 431        sbus_writew(leptr, &ib->tx_ptr);
 432}
 433
 434static void init_restart_ledma(struct lance_private *lp)
 435{
 436        u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 437
 438        if (!(csr & DMA_HNDL_ERROR)) {
 439                /* E-Cache draining */
 440                while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
 441                        barrier();
 442        }
 443
 444        csr = sbus_readl(lp->dregs + DMA_CSR);
 445        csr &= ~DMA_E_BURSTS;
 446        if (lp->burst_sizes & DMA_BURST32)
 447                csr |= DMA_E_BURST32;
 448        else
 449                csr |= DMA_E_BURST16;
 450
 451        csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
 452
 453        if (lp->tpe)
 454                csr |= DMA_EN_ENETAUI;
 455        else
 456                csr &= ~DMA_EN_ENETAUI;
 457        udelay(20);
 458        sbus_writel(csr, lp->dregs + DMA_CSR);
 459        udelay(200);
 460}
 461
 462static int init_restart_lance(struct lance_private *lp)
 463{
 464        u16 regval = 0;
 465        int i;
 466
 467        if (lp->dregs)
 468                init_restart_ledma(lp);
 469
 470        sbus_writew(LE_CSR0,    lp->lregs + RAP);
 471        sbus_writew(LE_C0_INIT, lp->lregs + RDP);
 472
 473        /* Wait for the lance to complete initialization */
 474        for (i = 0; i < 100; i++) {
 475                regval = sbus_readw(lp->lregs + RDP);
 476
 477                if (regval & (LE_C0_ERR | LE_C0_IDON))
 478                        break;
 479                barrier();
 480        }
 481        if (i == 100 || (regval & LE_C0_ERR)) {
 482                printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
 483                       i, regval);
 484                if (lp->dregs)
 485                        printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
 486                return -1;
 487        }
 488
 489        /* Clear IDON by writing a "1", enable interrupts and start lance */
 490        sbus_writew(LE_C0_IDON,                 lp->lregs + RDP);
 491        sbus_writew(LE_C0_INEA | LE_C0_STRT,    lp->lregs + RDP);
 492
 493        if (lp->dregs) {
 494                u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 495
 496                csr |= DMA_INT_ENAB;
 497                sbus_writel(csr, lp->dregs + DMA_CSR);
 498        }
 499
 500        return 0;
 501}
 502
 503static void lance_rx_dvma(struct net_device *dev)
 504{
 505        struct lance_private *lp = netdev_priv(dev);
 506        struct lance_init_block *ib = lp->init_block_mem;
 507        struct lance_rx_desc *rd;
 508        u8 bits;
 509        int len, entry = lp->rx_new;
 510        struct sk_buff *skb;
 511
 512        for (rd = &ib->brx_ring [entry];
 513             !((bits = rd->rmd1_bits) & LE_R1_OWN);
 514             rd = &ib->brx_ring [entry]) {
 515
 516                /* We got an incomplete frame? */
 517                if ((bits & LE_R1_POK) != LE_R1_POK) {
 518                        dev->stats.rx_over_errors++;
 519                        dev->stats.rx_errors++;
 520                } else if (bits & LE_R1_ERR) {
 521                        /* Count only the end frame as a rx error,
 522                         * not the beginning
 523                         */
 524                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 525                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 526                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 527                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 528                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 529                } else {
 530                        len = (rd->mblength & 0xfff) - 4;
 531                        skb = netdev_alloc_skb(dev, len + 2);
 532
 533                        if (skb == NULL) {
 534                                dev->stats.rx_dropped++;
 535                                rd->mblength = 0;
 536                                rd->rmd1_bits = LE_R1_OWN;
 537                                lp->rx_new = RX_NEXT(entry);
 538                                return;
 539                        }
 540
 541                        dev->stats.rx_bytes += len;
 542
 543                        skb_reserve(skb, 2);            /* 16 byte align */
 544                        skb_put(skb, len);              /* make room */
 545                        skb_copy_to_linear_data(skb,
 546                                         (unsigned char *)&(ib->rx_buf [entry][0]),
 547                                         len);
 548                        skb->protocol = eth_type_trans(skb, dev);
 549                        netif_rx(skb);
 550                        dev->stats.rx_packets++;
 551                }
 552
 553                /* Return the packet to the pool */
 554                rd->mblength = 0;
 555                rd->rmd1_bits = LE_R1_OWN;
 556                entry = RX_NEXT(entry);
 557        }
 558
 559        lp->rx_new = entry;
 560}
 561
 562static void lance_tx_dvma(struct net_device *dev)
 563{
 564        struct lance_private *lp = netdev_priv(dev);
 565        struct lance_init_block *ib = lp->init_block_mem;
 566        int i, j;
 567
 568        spin_lock(&lp->lock);
 569
 570        j = lp->tx_old;
 571        for (i = j; i != lp->tx_new; i = j) {
 572                struct lance_tx_desc *td = &ib->btx_ring [i];
 573                u8 bits = td->tmd1_bits;
 574
 575                /* If we hit a packet not owned by us, stop */
 576                if (bits & LE_T1_OWN)
 577                        break;
 578
 579                if (bits & LE_T1_ERR) {
 580                        u16 status = td->misc;
 581
 582                        dev->stats.tx_errors++;
 583                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 584                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 585
 586                        if (status & LE_T3_CLOS) {
 587                                dev->stats.tx_carrier_errors++;
 588                                if (lp->auto_select) {
 589                                        lp->tpe = 1 - lp->tpe;
 590                                        printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 591                                               dev->name, lp->tpe?"TPE":"AUI");
 592                                        STOP_LANCE(lp);
 593                                        lp->init_ring(dev);
 594                                        load_csrs(lp);
 595                                        init_restart_lance(lp);
 596                                        goto out;
 597                                }
 598                        }
 599
 600                        /* Buffer errors and underflows turn off the
 601                         * transmitter, restart the adapter.
 602                         */
 603                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 604                                dev->stats.tx_fifo_errors++;
 605
 606                                printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 607                                       dev->name);
 608                                STOP_LANCE(lp);
 609                                lp->init_ring(dev);
 610                                load_csrs(lp);
 611                                init_restart_lance(lp);
 612                                goto out;
 613                        }
 614                } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 615                        /*
 616                         * So we don't count the packet more than once.
 617                         */
 618                        td->tmd1_bits = bits & ~(LE_T1_POK);
 619
 620                        /* One collision before packet was sent. */
 621                        if (bits & LE_T1_EONE)
 622                                dev->stats.collisions++;
 623
 624                        /* More than one collision, be optimistic. */
 625                        if (bits & LE_T1_EMORE)
 626                                dev->stats.collisions += 2;
 627
 628                        dev->stats.tx_packets++;
 629                }
 630
 631                j = TX_NEXT(j);
 632        }
 633        lp->tx_old = j;
 634out:
 635        if (netif_queue_stopped(dev) &&
 636            TX_BUFFS_AVAIL > 0)
 637                netif_wake_queue(dev);
 638
 639        spin_unlock(&lp->lock);
 640}
 641
 642static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
 643{
 644        u16 *p16 = (u16 *) skb->data;
 645        u32 *p32;
 646        u8 *p8;
 647        void __iomem *pbuf = piobuf;
 648
 649        /* We know here that both src and dest are on a 16bit boundary. */
 650        *p16++ = sbus_readw(pbuf);
 651        p32 = (u32 *) p16;
 652        pbuf += 2;
 653        len -= 2;
 654
 655        while (len >= 4) {
 656                *p32++ = sbus_readl(pbuf);
 657                pbuf += 4;
 658                len -= 4;
 659        }
 660        p8 = (u8 *) p32;
 661        if (len >= 2) {
 662                p16 = (u16 *) p32;
 663                *p16++ = sbus_readw(pbuf);
 664                pbuf += 2;
 665                len -= 2;
 666                p8 = (u8 *) p16;
 667        }
 668        if (len >= 1)
 669                *p8 = sbus_readb(pbuf);
 670}
 671
 672static void lance_rx_pio(struct net_device *dev)
 673{
 674        struct lance_private *lp = netdev_priv(dev);
 675        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 676        struct lance_rx_desc __iomem *rd;
 677        unsigned char bits;
 678        int len, entry;
 679        struct sk_buff *skb;
 680
 681        entry = lp->rx_new;
 682        for (rd = &ib->brx_ring [entry];
 683             !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
 684             rd = &ib->brx_ring [entry]) {
 685
 686                /* We got an incomplete frame? */
 687                if ((bits & LE_R1_POK) != LE_R1_POK) {
 688                        dev->stats.rx_over_errors++;
 689                        dev->stats.rx_errors++;
 690                } else if (bits & LE_R1_ERR) {
 691                        /* Count only the end frame as a rx error,
 692                         * not the beginning
 693                         */
 694                        if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 695                        if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 696                        if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 697                        if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 698                        if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 699                } else {
 700                        len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
 701                        skb = netdev_alloc_skb(dev, len + 2);
 702
 703                        if (skb == NULL) {
 704                                dev->stats.rx_dropped++;
 705                                sbus_writew(0, &rd->mblength);
 706                                sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 707                                lp->rx_new = RX_NEXT(entry);
 708                                return;
 709                        }
 710
 711                        dev->stats.rx_bytes += len;
 712
 713                        skb_reserve (skb, 2);           /* 16 byte align */
 714                        skb_put(skb, len);              /* make room */
 715                        lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
 716                        skb->protocol = eth_type_trans(skb, dev);
 717                        netif_rx(skb);
 718                        dev->stats.rx_packets++;
 719                }
 720
 721                /* Return the packet to the pool */
 722                sbus_writew(0, &rd->mblength);
 723                sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 724                entry = RX_NEXT(entry);
 725        }
 726
 727        lp->rx_new = entry;
 728}
 729
 730static void lance_tx_pio(struct net_device *dev)
 731{
 732        struct lance_private *lp = netdev_priv(dev);
 733        struct lance_init_block __iomem *ib = lp->init_block_iomem;
 734        int i, j;
 735
 736        spin_lock(&lp->lock);
 737
 738        j = lp->tx_old;
 739        for (i = j; i != lp->tx_new; i = j) {
 740                struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
 741                u8 bits = sbus_readb(&td->tmd1_bits);
 742
 743                /* If we hit a packet not owned by us, stop */
 744                if (bits & LE_T1_OWN)
 745                        break;
 746
 747                if (bits & LE_T1_ERR) {
 748                        u16 status = sbus_readw(&td->misc);
 749
 750                        dev->stats.tx_errors++;
 751                        if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 752                        if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 753
 754                        if (status & LE_T3_CLOS) {
 755                                dev->stats.tx_carrier_errors++;
 756                                if (lp->auto_select) {
 757                                        lp->tpe = 1 - lp->tpe;
 758                                        printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 759                                               dev->name, lp->tpe?"TPE":"AUI");
 760                                        STOP_LANCE(lp);
 761                                        lp->init_ring(dev);
 762                                        load_csrs(lp);
 763                                        init_restart_lance(lp);
 764                                        goto out;
 765                                }
 766                        }
 767
 768                        /* Buffer errors and underflows turn off the
 769                         * transmitter, restart the adapter.
 770                         */
 771                        if (status & (LE_T3_BUF|LE_T3_UFL)) {
 772                                dev->stats.tx_fifo_errors++;
 773
 774                                printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 775                                       dev->name);
 776                                STOP_LANCE(lp);
 777                                lp->init_ring(dev);
 778                                load_csrs(lp);
 779                                init_restart_lance(lp);
 780                                goto out;
 781                        }
 782                } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 783                        /*
 784                         * So we don't count the packet more than once.
 785                         */
 786                        sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
 787
 788                        /* One collision before packet was sent. */
 789                        if (bits & LE_T1_EONE)
 790                                dev->stats.collisions++;
 791
 792                        /* More than one collision, be optimistic. */
 793                        if (bits & LE_T1_EMORE)
 794                                dev->stats.collisions += 2;
 795
 796                        dev->stats.tx_packets++;
 797                }
 798
 799                j = TX_NEXT(j);
 800        }
 801        lp->tx_old = j;
 802
 803        if (netif_queue_stopped(dev) &&
 804            TX_BUFFS_AVAIL > 0)
 805                netif_wake_queue(dev);
 806out:
 807        spin_unlock(&lp->lock);
 808}
 809
 810static irqreturn_t lance_interrupt(int irq, void *dev_id)
 811{
 812        struct net_device *dev = dev_id;
 813        struct lance_private *lp = netdev_priv(dev);
 814        int csr0;
 815
 816        sbus_writew(LE_CSR0, lp->lregs + RAP);
 817        csr0 = sbus_readw(lp->lregs + RDP);
 818
 819        /* Acknowledge all the interrupt sources ASAP */
 820        sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
 821                    lp->lregs + RDP);
 822
 823        if ((csr0 & LE_C0_ERR) != 0) {
 824                /* Clear the error condition */
 825                sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
 826                             LE_C0_CERR | LE_C0_MERR),
 827                            lp->lregs + RDP);
 828        }
 829
 830        if (csr0 & LE_C0_RINT)
 831                lp->rx(dev);
 832
 833        if (csr0 & LE_C0_TINT)
 834                lp->tx(dev);
 835
 836        if (csr0 & LE_C0_BABL)
 837                dev->stats.tx_errors++;
 838
 839        if (csr0 & LE_C0_MISS)
 840                dev->stats.rx_errors++;
 841
 842        if (csr0 & LE_C0_MERR) {
 843                if (lp->dregs) {
 844                        u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
 845
 846                        printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
 847                               dev->name, csr0, addr & 0xffffff);
 848                } else {
 849                        printk(KERN_ERR "%s: Memory error, status %04x\n",
 850                               dev->name, csr0);
 851                }
 852
 853                sbus_writew(LE_C0_STOP, lp->lregs + RDP);
 854
 855                if (lp->dregs) {
 856                        u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
 857
 858                        dma_csr |= DMA_FIFO_INV;
 859                        sbus_writel(dma_csr, lp->dregs + DMA_CSR);
 860                }
 861
 862                lp->init_ring(dev);
 863                load_csrs(lp);
 864                init_restart_lance(lp);
 865                netif_wake_queue(dev);
 866        }
 867
 868        sbus_writew(LE_C0_INEA, lp->lregs + RDP);
 869
 870        return IRQ_HANDLED;
 871}
 872
 873/* Build a fake network packet and send it to ourselves. */
 874static void build_fake_packet(struct lance_private *lp)
 875{
 876        struct net_device *dev = lp->dev;
 877        int i, entry;
 878
 879        entry = lp->tx_new & TX_RING_MOD_MASK;
 880        if (lp->pio_buffer) {
 881                struct lance_init_block __iomem *ib = lp->init_block_iomem;
 882                u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
 883                struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
 884                for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
 885                        sbus_writew(0, &packet[i]);
 886                for (i = 0; i < 6; i++) {
 887                        sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
 888                        sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
 889                }
 890                sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
 891                sbus_writew(0, &ib->btx_ring[entry].misc);
 892                sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
 893        } else {
 894                struct lance_init_block *ib = lp->init_block_mem;
 895                u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
 896                struct ethhdr *eth = (struct ethhdr *) packet;
 897                memset(packet, 0, ETH_ZLEN);
 898                for (i = 0; i < 6; i++) {
 899                        eth->h_dest[i] = dev->dev_addr[i];
 900                        eth->h_source[i] = dev->dev_addr[i];
 901                }
 902                ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
 903                ib->btx_ring[entry].misc = 0;
 904                ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 905        }
 906        lp->tx_new = TX_NEXT(entry);
 907}
 908
 909static int lance_open(struct net_device *dev)
 910{
 911        struct lance_private *lp = netdev_priv(dev);
 912        int status = 0;
 913
 914        STOP_LANCE(lp);
 915
 916        if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
 917                        lancestr, (void *) dev)) {
 918                printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
 919                return -EAGAIN;
 920        }
 921
 922        /* On the 4m, setup the ledma to provide the upper bits for buffers */
 923        if (lp->dregs) {
 924                u32 regval = lp->init_block_dvma & 0xff000000;
 925
 926                sbus_writel(regval, lp->dregs + DMA_TEST);
 927        }
 928
 929        /* Set mode and clear multicast filter only at device open,
 930         * so that lance_init_ring() called at any error will not
 931         * forget multicast filters.
 932         *
 933         * BTW it is common bug in all lance drivers! --ANK
 934         */
 935        if (lp->pio_buffer) {
 936                struct lance_init_block __iomem *ib = lp->init_block_iomem;
 937                sbus_writew(0, &ib->mode);
 938                sbus_writel(0, &ib->filter[0]);
 939                sbus_writel(0, &ib->filter[1]);
 940        } else {
 941                struct lance_init_block *ib = lp->init_block_mem;
 942                ib->mode = 0;
 943                ib->filter [0] = 0;
 944                ib->filter [1] = 0;
 945        }
 946
 947        lp->init_ring(dev);
 948        load_csrs(lp);
 949
 950        netif_start_queue(dev);
 951
 952        status = init_restart_lance(lp);
 953        if (!status && lp->auto_select) {
 954                build_fake_packet(lp);
 955                sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
 956        }
 957
 958        return status;
 959}
 960
 961static int lance_close(struct net_device *dev)
 962{
 963        struct lance_private *lp = netdev_priv(dev);
 964
 965        netif_stop_queue(dev);
 966        del_timer_sync(&lp->multicast_timer);
 967
 968        STOP_LANCE(lp);
 969
 970        free_irq(dev->irq, (void *) dev);
 971        return 0;
 972}
 973
 974static int lance_reset(struct net_device *dev)
 975{
 976        struct lance_private *lp = netdev_priv(dev);
 977        int status;
 978
 979        STOP_LANCE(lp);
 980
 981        /* On the 4m, reset the dma too */
 982        if (lp->dregs) {
 983                u32 csr, addr;
 984
 985                printk(KERN_ERR "resetting ledma\n");
 986                csr = sbus_readl(lp->dregs + DMA_CSR);
 987                sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
 988                udelay(200);
 989                sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
 990
 991                addr = lp->init_block_dvma & 0xff000000;
 992                sbus_writel(addr, lp->dregs + DMA_TEST);
 993        }
 994        lp->init_ring(dev);
 995        load_csrs(lp);
 996        netif_trans_update(dev); /* prevent tx timeout */
 997        status = init_restart_lance(lp);
 998        return status;
 999}
1000
1001static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1002{
1003        void __iomem *piobuf = dest;
1004        u32 *p32;
1005        u16 *p16;
1006        u8 *p8;
1007
1008        switch ((unsigned long)src & 0x3) {
1009        case 0:
1010                p32 = (u32 *) src;
1011                while (len >= 4) {
1012                        sbus_writel(*p32, piobuf);
1013                        p32++;
1014                        piobuf += 4;
1015                        len -= 4;
1016                }
1017                src = (char *) p32;
1018                break;
1019        case 1:
1020        case 3:
1021                p8 = (u8 *) src;
1022                while (len >= 4) {
1023                        u32 val;
1024
1025                        val  = p8[0] << 24;
1026                        val |= p8[1] << 16;
1027                        val |= p8[2] << 8;
1028                        val |= p8[3];
1029                        sbus_writel(val, piobuf);
1030                        p8 += 4;
1031                        piobuf += 4;
1032                        len -= 4;
1033                }
1034                src = (char *) p8;
1035                break;
1036        case 2:
1037                p16 = (u16 *) src;
1038                while (len >= 4) {
1039                        u32 val = p16[0]<<16 | p16[1];
1040                        sbus_writel(val, piobuf);
1041                        p16 += 2;
1042                        piobuf += 4;
1043                        len -= 4;
1044                }
1045                src = (char *) p16;
1046                break;
1047        }
1048        if (len >= 2) {
1049                u16 val = src[0] << 8 | src[1];
1050                sbus_writew(val, piobuf);
1051                src += 2;
1052                piobuf += 2;
1053                len -= 2;
1054        }
1055        if (len >= 1)
1056                sbus_writeb(src[0], piobuf);
1057}
1058
1059static void lance_piozero(void __iomem *dest, int len)
1060{
1061        void __iomem *piobuf = dest;
1062
1063        if ((unsigned long)piobuf & 1) {
1064                sbus_writeb(0, piobuf);
1065                piobuf += 1;
1066                len -= 1;
1067                if (len == 0)
1068                        return;
1069        }
1070        if (len == 1) {
1071                sbus_writeb(0, piobuf);
1072                return;
1073        }
1074        if ((unsigned long)piobuf & 2) {
1075                sbus_writew(0, piobuf);
1076                piobuf += 2;
1077                len -= 2;
1078                if (len == 0)
1079                        return;
1080        }
1081        while (len >= 4) {
1082                sbus_writel(0, piobuf);
1083                piobuf += 4;
1084                len -= 4;
1085        }
1086        if (len >= 2) {
1087                sbus_writew(0, piobuf);
1088                piobuf += 2;
1089                len -= 2;
1090        }
1091        if (len >= 1)
1092                sbus_writeb(0, piobuf);
1093}
1094
1095static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
1096{
1097        struct lance_private *lp = netdev_priv(dev);
1098
1099        printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1100               dev->name, sbus_readw(lp->lregs + RDP));
1101        lance_reset(dev);
1102        netif_wake_queue(dev);
1103}
1104
1105static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1106{
1107        struct lance_private *lp = netdev_priv(dev);
1108        int entry, skblen, len;
1109
1110        skblen = skb->len;
1111
1112        len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1113
1114        spin_lock_irq(&lp->lock);
1115
1116        dev->stats.tx_bytes += len;
1117
1118        entry = lp->tx_new & TX_RING_MOD_MASK;
1119        if (lp->pio_buffer) {
1120                struct lance_init_block __iomem *ib = lp->init_block_iomem;
1121                sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1122                sbus_writew(0, &ib->btx_ring[entry].misc);
1123                lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1124                if (len != skblen)
1125                        lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1126                sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1127        } else {
1128                struct lance_init_block *ib = lp->init_block_mem;
1129                ib->btx_ring [entry].length = (-len) | 0xf000;
1130                ib->btx_ring [entry].misc = 0;
1131                skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1132                if (len != skblen)
1133                        memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1134                ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1135        }
1136
1137        lp->tx_new = TX_NEXT(entry);
1138
1139        if (TX_BUFFS_AVAIL <= 0)
1140                netif_stop_queue(dev);
1141
1142        /* Kick the lance: transmit now */
1143        sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1144
1145        /* Read back CSR to invalidate the E-Cache.
1146         * This is needed, because DMA_DSBL_WR_INV is set.
1147         */
1148        if (lp->dregs)
1149                sbus_readw(lp->lregs + RDP);
1150
1151        spin_unlock_irq(&lp->lock);
1152
1153        dev_kfree_skb(skb);
1154
1155        return NETDEV_TX_OK;
1156}
1157
1158/* taken from the depca driver */
1159static void lance_load_multicast(struct net_device *dev)
1160{
1161        struct lance_private *lp = netdev_priv(dev);
1162        struct netdev_hw_addr *ha;
1163        u32 crc;
1164        u32 val;
1165
1166        /* set all multicast bits */
1167        if (dev->flags & IFF_ALLMULTI)
1168                val = ~0;
1169        else
1170                val = 0;
1171
1172        if (lp->pio_buffer) {
1173                struct lance_init_block __iomem *ib = lp->init_block_iomem;
1174                sbus_writel(val, &ib->filter[0]);
1175                sbus_writel(val, &ib->filter[1]);
1176        } else {
1177                struct lance_init_block *ib = lp->init_block_mem;
1178                ib->filter [0] = val;
1179                ib->filter [1] = val;
1180        }
1181
1182        if (dev->flags & IFF_ALLMULTI)
1183                return;
1184
1185        /* Add addresses */
1186        netdev_for_each_mc_addr(ha, dev) {
1187                crc = ether_crc_le(6, ha->addr);
1188                crc = crc >> 26;
1189                if (lp->pio_buffer) {
1190                        struct lance_init_block __iomem *ib = lp->init_block_iomem;
1191                        u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1192                        u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1193                        tmp |= 1 << (crc & 0xf);
1194                        sbus_writew(tmp, &mcast_table[crc>>4]);
1195                } else {
1196                        struct lance_init_block *ib = lp->init_block_mem;
1197                        u16 *mcast_table = (u16 *) &ib->filter;
1198                        mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1199                }
1200        }
1201}
1202
1203static void lance_set_multicast(struct net_device *dev)
1204{
1205        struct lance_private *lp = netdev_priv(dev);
1206        struct lance_init_block *ib_mem = lp->init_block_mem;
1207        struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1208        u16 mode;
1209
1210        if (!netif_running(dev))
1211                return;
1212
1213        if (lp->tx_old != lp->tx_new) {
1214                mod_timer(&lp->multicast_timer, jiffies + 4);
1215                netif_wake_queue(dev);
1216                return;
1217        }
1218
1219        netif_stop_queue(dev);
1220
1221        STOP_LANCE(lp);
1222        lp->init_ring(dev);
1223
1224        if (lp->pio_buffer)
1225                mode = sbus_readw(&ib_iomem->mode);
1226        else
1227                mode = ib_mem->mode;
1228        if (dev->flags & IFF_PROMISC) {
1229                mode |= LE_MO_PROM;
1230                if (lp->pio_buffer)
1231                        sbus_writew(mode, &ib_iomem->mode);
1232                else
1233                        ib_mem->mode = mode;
1234        } else {
1235                mode &= ~LE_MO_PROM;
1236                if (lp->pio_buffer)
1237                        sbus_writew(mode, &ib_iomem->mode);
1238                else
1239                        ib_mem->mode = mode;
1240                lance_load_multicast(dev);
1241        }
1242        load_csrs(lp);
1243        init_restart_lance(lp);
1244        netif_wake_queue(dev);
1245}
1246
1247static void lance_set_multicast_retry(struct timer_list *t)
1248{
1249        struct lance_private *lp = from_timer(lp, t, multicast_timer);
1250        struct net_device *dev = lp->dev;
1251
1252        lance_set_multicast(dev);
1253}
1254
1255static void lance_free_hwresources(struct lance_private *lp)
1256{
1257        if (lp->lregs)
1258                of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1259        if (lp->dregs) {
1260                struct platform_device *ledma = lp->ledma;
1261
1262                of_iounmap(&ledma->resource[0], lp->dregs,
1263                           resource_size(&ledma->resource[0]));
1264        }
1265        if (lp->init_block_iomem) {
1266                of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1267                           sizeof(struct lance_init_block));
1268        } else if (lp->init_block_mem) {
1269                dma_free_coherent(&lp->op->dev,
1270                                  sizeof(struct lance_init_block),
1271                                  lp->init_block_mem,
1272                                  lp->init_block_dvma);
1273        }
1274}
1275
1276/* Ethtool support... */
1277static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1278{
1279        strlcpy(info->driver, "sunlance", sizeof(info->driver));
1280}
1281
1282static const struct ethtool_ops sparc_lance_ethtool_ops = {
1283        .get_drvinfo            = sparc_lance_get_drvinfo,
1284        .get_link               = ethtool_op_get_link,
1285};
1286
1287static const struct net_device_ops sparc_lance_ops = {
1288        .ndo_open               = lance_open,
1289        .ndo_stop               = lance_close,
1290        .ndo_start_xmit         = lance_start_xmit,
1291        .ndo_set_rx_mode        = lance_set_multicast,
1292        .ndo_tx_timeout         = lance_tx_timeout,
1293        .ndo_set_mac_address    = eth_mac_addr,
1294        .ndo_validate_addr      = eth_validate_addr,
1295};
1296
1297static int sparc_lance_probe_one(struct platform_device *op,
1298                                 struct platform_device *ledma,
1299                                 struct platform_device *lebuffer)
1300{
1301        struct device_node *dp = op->dev.of_node;
1302        struct lance_private *lp;
1303        struct net_device *dev;
1304
1305        dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1306        if (!dev)
1307                return -ENOMEM;
1308
1309        lp = netdev_priv(dev);
1310
1311        spin_lock_init(&lp->lock);
1312
1313        /* Copy the IDPROM ethernet address to the device structure, later we
1314         * will copy the address in the device structure to the lance
1315         * initialization block.
1316         */
1317        eth_hw_addr_set(dev, idprom->id_ethaddr);
1318
1319        /* Get the IO region */
1320        lp->lregs = of_ioremap(&op->resource[0], 0,
1321                               LANCE_REG_SIZE, lancestr);
1322        if (!lp->lregs) {
1323                printk(KERN_ERR "SunLance: Cannot map registers.\n");
1324                goto fail;
1325        }
1326
1327        lp->ledma = ledma;
1328        if (lp->ledma) {
1329                lp->dregs = of_ioremap(&ledma->resource[0], 0,
1330                                       resource_size(&ledma->resource[0]),
1331                                       "ledma");
1332                if (!lp->dregs) {
1333                        printk(KERN_ERR "SunLance: Cannot map "
1334                               "ledma registers.\n");
1335                        goto fail;
1336                }
1337        }
1338
1339        lp->op = op;
1340        lp->lebuffer = lebuffer;
1341        if (lebuffer) {
1342                /* sanity check */
1343                if (lebuffer->resource[0].start & 7) {
1344                        printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1345                        goto fail;
1346                }
1347                lp->init_block_iomem =
1348                        of_ioremap(&lebuffer->resource[0], 0,
1349                                   sizeof(struct lance_init_block), "lebuffer");
1350                if (!lp->init_block_iomem) {
1351                        printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1352                        goto fail;
1353                }
1354                lp->init_block_dvma = 0;
1355                lp->pio_buffer = 1;
1356                lp->init_ring = lance_init_ring_pio;
1357                lp->rx = lance_rx_pio;
1358                lp->tx = lance_tx_pio;
1359        } else {
1360                lp->init_block_mem =
1361                        dma_alloc_coherent(&op->dev,
1362                                           sizeof(struct lance_init_block),
1363                                           &lp->init_block_dvma, GFP_ATOMIC);
1364                if (!lp->init_block_mem)
1365                        goto fail;
1366
1367                lp->pio_buffer = 0;
1368                lp->init_ring = lance_init_ring_dvma;
1369                lp->rx = lance_rx_dvma;
1370                lp->tx = lance_tx_dvma;
1371        }
1372        lp->busmaster_regval = of_getintprop_default(dp,  "busmaster-regval",
1373                                                     (LE_C3_BSWP |
1374                                                      LE_C3_ACON |
1375                                                      LE_C3_BCON));
1376
1377        lp->name = lancestr;
1378
1379        lp->burst_sizes = 0;
1380        if (lp->ledma) {
1381                struct device_node *ledma_dp = ledma->dev.of_node;
1382                struct device_node *sbus_dp;
1383                unsigned int sbmask;
1384                const char *prop;
1385                u32 csr;
1386
1387                /* Find burst-size property for ledma */
1388                lp->burst_sizes = of_getintprop_default(ledma_dp,
1389                                                        "burst-sizes", 0);
1390
1391                /* ledma may be capable of fast bursts, but sbus may not. */
1392                sbus_dp = ledma_dp->parent;
1393                sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1394                                               DMA_BURSTBITS);
1395                lp->burst_sizes &= sbmask;
1396
1397                /* Get the cable-selection property */
1398                prop = of_get_property(ledma_dp, "cable-selection", NULL);
1399                if (!prop || prop[0] == '\0') {
1400                        struct device_node *nd;
1401
1402                        printk(KERN_INFO "SunLance: using "
1403                               "auto-carrier-detection.\n");
1404
1405                        nd = of_find_node_by_path("/options");
1406                        if (!nd)
1407                                goto no_link_test;
1408
1409                        prop = of_get_property(nd, "tpe-link-test?", NULL);
1410                        if (!prop)
1411                                goto node_put;
1412
1413                        if (strcmp(prop, "true")) {
1414                                printk(KERN_NOTICE "SunLance: warning: overriding option "
1415                                       "'tpe-link-test?'\n");
1416                                printk(KERN_NOTICE "SunLance: warning: mail any problems "
1417                                       "to ecd@skynet.be\n");
1418                                auxio_set_lte(AUXIO_LTE_ON);
1419                        }
1420node_put:
1421                        of_node_put(nd);
1422no_link_test:
1423                        lp->auto_select = 1;
1424                        lp->tpe = 0;
1425                } else if (!strcmp(prop, "aui")) {
1426                        lp->auto_select = 0;
1427                        lp->tpe = 0;
1428                } else {
1429                        lp->auto_select = 0;
1430                        lp->tpe = 1;
1431                }
1432
1433                /* Reset ledma */
1434                csr = sbus_readl(lp->dregs + DMA_CSR);
1435                sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1436                udelay(200);
1437                sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1438        } else
1439                lp->dregs = NULL;
1440
1441        lp->dev = dev;
1442        SET_NETDEV_DEV(dev, &op->dev);
1443        dev->watchdog_timeo = 5*HZ;
1444        dev->ethtool_ops = &sparc_lance_ethtool_ops;
1445        dev->netdev_ops = &sparc_lance_ops;
1446
1447        dev->irq = op->archdata.irqs[0];
1448
1449        /* We cannot sleep if the chip is busy during a
1450         * multicast list update event, because such events
1451         * can occur from interrupts (ex. IPv6).  So we
1452         * use a timer to try again later when necessary. -DaveM
1453         */
1454        timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1455
1456        if (register_netdev(dev)) {
1457                printk(KERN_ERR "SunLance: Cannot register device.\n");
1458                goto fail;
1459        }
1460
1461        platform_set_drvdata(op, lp);
1462
1463        printk(KERN_INFO "%s: LANCE %pM\n",
1464               dev->name, dev->dev_addr);
1465
1466        return 0;
1467
1468fail:
1469        lance_free_hwresources(lp);
1470        free_netdev(dev);
1471        return -ENODEV;
1472}
1473
1474static int sunlance_sbus_probe(struct platform_device *op)
1475{
1476        struct platform_device *parent = to_platform_device(op->dev.parent);
1477        struct device_node *parent_dp = parent->dev.of_node;
1478        int err;
1479
1480        if (of_node_name_eq(parent_dp, "ledma")) {
1481                err = sparc_lance_probe_one(op, parent, NULL);
1482        } else if (of_node_name_eq(parent_dp, "lebuffer")) {
1483                err = sparc_lance_probe_one(op, NULL, parent);
1484        } else
1485                err = sparc_lance_probe_one(op, NULL, NULL);
1486
1487        return err;
1488}
1489
1490static int sunlance_sbus_remove(struct platform_device *op)
1491{
1492        struct lance_private *lp = platform_get_drvdata(op);
1493        struct net_device *net_dev = lp->dev;
1494
1495        unregister_netdev(net_dev);
1496
1497        lance_free_hwresources(lp);
1498
1499        free_netdev(net_dev);
1500
1501        return 0;
1502}
1503
1504static const struct of_device_id sunlance_sbus_match[] = {
1505        {
1506                .name = "le",
1507        },
1508        {},
1509};
1510
1511MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1512
1513static struct platform_driver sunlance_sbus_driver = {
1514        .driver = {
1515                .name = "sunlance",
1516                .of_match_table = sunlance_sbus_match,
1517        },
1518        .probe          = sunlance_sbus_probe,
1519        .remove         = sunlance_sbus_remove,
1520};
1521
1522module_platform_driver(sunlance_sbus_driver);
1523