root/drivers/net/ethernet/amd/a2065.c

DEFINITIONS

1. load_csrs
2. lance_init_ring
3. init_restart_lance
4. lance_rx
5. lance_tx
6. lance_tx_buffs_avail
7. lance_interrupt
8. lance_open
9. lance_close
10. lance_reset
11. lance_tx_timeout
12. lance_start_xmit
13. lance_load_multicast
14. lance_set_multicast
15. lance_set_multicast_retry
16. a2065_init_one
17. a2065_remove_one
18. a2065_init_module
19. a2065_cleanup_module

   1 /*
   2  * Amiga Linux/68k A2065 Ethernet Driver
   3  *
   4  * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
   5  *
   6  * Fixes and tips by:
   7  *      - Janos Farkas (CHEXUM@sparta.banki.hu)
   8  *      - Jes Degn Soerensen (jds@kom.auc.dk)
   9  *      - Matt Domsch (Matt_Domsch@dell.com)
  10  *
  11  * ----------------------------------------------------------------------------
  12  *
  13  * This program is based on
  14  *
  15  *      ariadne.?:      Amiga Linux/68k Ariadne Ethernet Driver
  16  *                      (C) Copyright 1995 by Geert Uytterhoeven,
  17  *                                            Peter De Schrijver
  18  *
  19  *      lance.c:        An AMD LANCE ethernet driver for linux.
  20  *                      Written 1993-94 by Donald Becker.
  21  *
  22  *      Am79C960:       PCnet(tm)-ISA Single-Chip Ethernet Controller
  23  *                      Advanced Micro Devices
  24  *                      Publication #16907, Rev. B, Amendment/0, May 1994
  25  *
  26  * ----------------------------------------------------------------------------
  27  *
  28  * This file is subject to the terms and conditions of the GNU General Public
  29  * License.  See the file COPYING in the main directory of the Linux
  30  * distribution for more details.
  31  *
  32  * ----------------------------------------------------------------------------
  33  *
  34  * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
  35  *
  36  *      - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
  37  *        both 10BASE-2 (thin coax) and AUI (DB-15) connectors
  38  */
  39 
  40 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  41 
  42 /*#define DEBUG*/
  43 /*#define TEST_HITS*/
  44 
  45 #include <linux/errno.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/etherdevice.h>
  48 #include <linux/module.h>
  49 #include <linux/stddef.h>
  50 #include <linux/kernel.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/ioport.h>
  53 #include <linux/skbuff.h>
  54 #include <linux/string.h>
  55 #include <linux/init.h>
  56 #include <linux/crc32.h>
  57 #include <linux/zorro.h>
  58 #include <linux/bitops.h>
  59 
  60 #include <asm/byteorder.h>
  61 #include <asm/irq.h>
  62 #include <asm/amigaints.h>
  63 #include <asm/amigahw.h>
  64 
  65 #include "a2065.h"
  66 
  67 /* Transmit/Receive Ring Definitions */
  68 
  69 #define LANCE_LOG_TX_BUFFERS    (2)
  70 #define LANCE_LOG_RX_BUFFERS    (4)
  71 
  72 #define TX_RING_SIZE            (1 << LANCE_LOG_TX_BUFFERS)
  73 #define RX_RING_SIZE            (1 << LANCE_LOG_RX_BUFFERS)
  74 
  75 #define TX_RING_MOD_MASK        (TX_RING_SIZE - 1)
  76 #define RX_RING_MOD_MASK        (RX_RING_SIZE - 1)
  77 
  78 #define PKT_BUF_SIZE            (1544)
  79 #define RX_BUFF_SIZE            PKT_BUF_SIZE
  80 #define TX_BUFF_SIZE            PKT_BUF_SIZE
  81 
  82 /* Layout of the Lance's RAM Buffer */
  83 
  84 struct lance_init_block {
  85         unsigned short mode;            /* Pre-set mode (reg. 15) */
  86         unsigned char phys_addr[6];     /* Physical ethernet address */
  87         unsigned filter[2];             /* Multicast filter. */
  88 
  89         /* Receive and transmit ring base, along with extra bits. */
  90         unsigned short rx_ptr;          /* receive descriptor addr */
  91         unsigned short rx_len;          /* receive len and high addr */
  92         unsigned short tx_ptr;          /* transmit descriptor addr */
  93         unsigned short tx_len;          /* transmit len and high addr */
  94 
  95         /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
  96         struct lance_rx_desc brx_ring[RX_RING_SIZE];
  97         struct lance_tx_desc btx_ring[TX_RING_SIZE];
  98 
  99         char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
 100         char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
 101 };
 102 
 103 /* Private Device Data */
 104 
 105 struct lance_private {
 106         char *name;
 107         volatile struct lance_regs *ll;
 108         volatile struct lance_init_block *init_block;       /* Hosts view */
 109         volatile struct lance_init_block *lance_init_block; /* Lance view */
 110 
 111         int rx_new, tx_new;
 112         int rx_old, tx_old;
 113 
 114         int lance_log_rx_bufs, lance_log_tx_bufs;
 115         int rx_ring_mod_mask, tx_ring_mod_mask;
 116 
 117         int tpe;                      /* cable-selection is TPE */
 118         int auto_select;              /* cable-selection by carrier */
 119         unsigned short busmaster_regval;
 120 
 121 #ifdef CONFIG_SUNLANCE
 122         struct Linux_SBus_DMA *ledma; /* if set this points to ledma and arch=4m */
 123         int burst_sizes;              /* ledma SBus burst sizes */
 124 #endif
 125         struct timer_list         multicast_timer;
 126         struct net_device         *dev;
 127 };
 128 
 129 #define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
 130 
 131 /* Load the CSR registers */
 132 static void load_csrs(struct lance_private *lp)
 133 {
 134         volatile struct lance_regs *ll = lp->ll;
 135         volatile struct lance_init_block *aib = lp->lance_init_block;
 136         int leptr = LANCE_ADDR(aib);
 137 
 138         ll->rap = LE_CSR1;
 139         ll->rdp = (leptr & 0xFFFF);
 140         ll->rap = LE_CSR2;
 141         ll->rdp = leptr >> 16;
 142         ll->rap = LE_CSR3;
 143         ll->rdp = lp->busmaster_regval;
 144 
 145         /* Point back to csr0 */
 146         ll->rap = LE_CSR0;
 147 }
 148 
 149 /* Setup the Lance Rx and Tx rings */
 150 static void lance_init_ring(struct net_device *dev)
 151 {
 152         struct lance_private *lp = netdev_priv(dev);
 153         volatile struct lance_init_block *ib = lp->init_block;
 154         volatile struct lance_init_block *aib = lp->lance_init_block;
 155                                         /* for LANCE_ADDR computations */
 156         int leptr;
 157         int i;
 158 
 159         /* Lock out other processes while setting up hardware */
 160         netif_stop_queue(dev);
 161         lp->rx_new = lp->tx_new = 0;
 162         lp->rx_old = lp->tx_old = 0;
 163 
 164         ib->mode = 0;
 165 
 166         /* Copy the ethernet address to the lance init block
 167          * Note that on the sparc you need to swap the ethernet address.
 168          */
 169         ib->phys_addr[0] = dev->dev_addr[1];
 170         ib->phys_addr[1] = dev->dev_addr[0];
 171         ib->phys_addr[2] = dev->dev_addr[3];
 172         ib->phys_addr[3] = dev->dev_addr[2];
 173         ib->phys_addr[4] = dev->dev_addr[5];
 174         ib->phys_addr[5] = dev->dev_addr[4];
 175 
 176         /* Setup the Tx ring entries */
 177         netdev_dbg(dev, "TX rings:\n");
 178         for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
 179                 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
 180                 ib->btx_ring[i].tmd0      = leptr;
 181                 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
 182                 ib->btx_ring[i].tmd1_bits = 0;
 183                 ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
 184                 ib->btx_ring[i].misc      = 0;
 185                 if (i < 3)
 186                         netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
 187         }
 188 
 189         /* Setup the Rx ring entries */
 190         netdev_dbg(dev, "RX rings:\n");
 191         for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
 192                 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
 193 
 194                 ib->brx_ring[i].rmd0      = leptr;
 195                 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
 196                 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
 197                 ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
 198                 ib->brx_ring[i].mblength  = 0;
 199                 if (i < 3)
 200                         netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
 201         }
 202 
 203         /* Setup the initialization block */
 204 
 205         /* Setup rx descriptor pointer */
 206         leptr = LANCE_ADDR(&aib->brx_ring);
 207         ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
 208         ib->rx_ptr = leptr;
 209         netdev_dbg(dev, "RX ptr: %08x\n", leptr);
 210 
 211         /* Setup tx descriptor pointer */
 212         leptr = LANCE_ADDR(&aib->btx_ring);
 213         ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
 214         ib->tx_ptr = leptr;
 215         netdev_dbg(dev, "TX ptr: %08x\n", leptr);
 216 
 217         /* Clear the multicast filter */
 218         ib->filter[0] = 0;
 219         ib->filter[1] = 0;
 220 }
 221 
 222 static int init_restart_lance(struct lance_private *lp)
 223 {
 224         volatile struct lance_regs *ll = lp->ll;
 225         int i;
 226 
 227         ll->rap = LE_CSR0;
 228         ll->rdp = LE_C0_INIT;
 229 
 230         /* Wait for the lance to complete initialization */
 231         for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
 232                 barrier();
 233         if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
 234                 pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
 235                 return -EIO;
 236         }
 237 
 238         /* Clear IDON by writing a "1", enable interrupts and start lance */
 239         ll->rdp = LE_C0_IDON;
 240         ll->rdp = LE_C0_INEA | LE_C0_STRT;
 241 
 242         return 0;
 243 }
 244 
 245 static int lance_rx(struct net_device *dev)
 246 {
 247         struct lance_private *lp = netdev_priv(dev);
 248         volatile struct lance_init_block *ib = lp->init_block;
 249         volatile struct lance_regs *ll = lp->ll;
 250         volatile struct lance_rx_desc *rd;
 251         unsigned char bits;
 252 
 253 #ifdef TEST_HITS
 254         int i;
 255         char buf[RX_RING_SIZE + 1];
 256 
 257         for (i = 0; i < RX_RING_SIZE; i++) {
 258                 char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
 259                 if (i == lp->rx_new)
 260                         buf[i] = r1_own ? '_' : 'X';
 261                 else
 262                         buf[i] = r1_own ? '.' : '1';
 263         }
 264         buf[RX_RING_SIZE] = 0;
 265 
 266         pr_debug("RxRing TestHits: [%s]\n", buf);
 267 #endif
 268 
 269         ll->rdp = LE_C0_RINT | LE_C0_INEA;
 270         for (rd = &ib->brx_ring[lp->rx_new];
 271              !((bits = rd->rmd1_bits) & LE_R1_OWN);
 272              rd = &ib->brx_ring[lp->rx_new]) {
 273 
 274                 /* We got an incomplete frame? */
 275                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 276                         dev->stats.rx_over_errors++;
 277                         dev->stats.rx_errors++;
 278                         continue;
 279                 } else if (bits & LE_R1_ERR) {
 280                         /* Count only the end frame as a rx error,
 281                          * not the beginning
 282                          */
 283                         if (bits & LE_R1_BUF)
 284                                 dev->stats.rx_fifo_errors++;
 285                         if (bits & LE_R1_CRC)
 286                                 dev->stats.rx_crc_errors++;
 287                         if (bits & LE_R1_OFL)
 288                                 dev->stats.rx_over_errors++;
 289                         if (bits & LE_R1_FRA)
 290                                 dev->stats.rx_frame_errors++;
 291                         if (bits & LE_R1_EOP)
 292                                 dev->stats.rx_errors++;
 293                 } else {
 294                         int len = (rd->mblength & 0xfff) - 4;
 295                         struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
 296 
 297                         if (!skb) {
 298                                 dev->stats.rx_dropped++;
 299                                 rd->mblength = 0;
 300                                 rd->rmd1_bits = LE_R1_OWN;
 301                                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 302                                 return 0;
 303                         }
 304 
 305                         skb_reserve(skb, 2);            /* 16 byte align */
 306                         skb_put(skb, len);              /* make room */
 307                         skb_copy_to_linear_data(skb,
 308                                  (unsigned char *)&ib->rx_buf[lp->rx_new][0],
 309                                  len);
 310                         skb->protocol = eth_type_trans(skb, dev);
 311                         netif_rx(skb);
 312                         dev->stats.rx_packets++;
 313                         dev->stats.rx_bytes += len;
 314                 }
 315 
 316                 /* Return the packet to the pool */
 317                 rd->mblength = 0;
 318                 rd->rmd1_bits = LE_R1_OWN;
 319                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
 320         }
 321         return 0;
 322 }
 323 
 324 static int lance_tx(struct net_device *dev)
 325 {
 326         struct lance_private *lp = netdev_priv(dev);
 327         volatile struct lance_init_block *ib = lp->init_block;
 328         volatile struct lance_regs *ll = lp->ll;
 329         volatile struct lance_tx_desc *td;
 330         int i, j;
 331         int status;
 332 
 333         /* csr0 is 2f3 */
 334         ll->rdp = LE_C0_TINT | LE_C0_INEA;
 335         /* csr0 is 73 */
 336 
 337         j = lp->tx_old;
 338         for (i = j; i != lp->tx_new; i = j) {
 339                 td = &ib->btx_ring[i];
 340 
 341                 /* If we hit a packet not owned by us, stop */
 342                 if (td->tmd1_bits & LE_T1_OWN)
 343                         break;
 344 
 345                 if (td->tmd1_bits & LE_T1_ERR) {
 346                         status = td->misc;
 347 
 348                         dev->stats.tx_errors++;
 349                         if (status & LE_T3_RTY)
 350                                 dev->stats.tx_aborted_errors++;
 351                         if (status & LE_T3_LCOL)
 352                                 dev->stats.tx_window_errors++;
 353 
 354                         if (status & LE_T3_CLOS) {
 355                                 dev->stats.tx_carrier_errors++;
 356                                 if (lp->auto_select) {
 357                                         lp->tpe = 1 - lp->tpe;
 358                                         netdev_err(dev, "Carrier Lost, trying %s\n",
 359                                                    lp->tpe ? "TPE" : "AUI");
 360                                         /* Stop the lance */
 361                                         ll->rap = LE_CSR0;
 362                                         ll->rdp = LE_C0_STOP;
 363                                         lance_init_ring(dev);
 364                                         load_csrs(lp);
 365                                         init_restart_lance(lp);
 366                                         return 0;
 367                                 }
 368                         }
 369 
 370                         /* buffer errors and underflows turn off
 371                          * the transmitter, so restart the adapter
 372                          */
 373                         if (status & (LE_T3_BUF | LE_T3_UFL)) {
 374                                 dev->stats.tx_fifo_errors++;
 375 
 376                                 netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
 377                                 /* Stop the lance */
 378                                 ll->rap = LE_CSR0;
 379                                 ll->rdp = LE_C0_STOP;
 380                                 lance_init_ring(dev);
 381                                 load_csrs(lp);
 382                                 init_restart_lance(lp);
 383                                 return 0;
 384                         }
 385                 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
 386                         /* So we don't count the packet more than once. */
 387                         td->tmd1_bits &= ~(LE_T1_POK);
 388 
 389                         /* One collision before packet was sent. */
 390                         if (td->tmd1_bits & LE_T1_EONE)
 391                                 dev->stats.collisions++;
 392 
 393                         /* More than one collision, be optimistic. */
 394                         if (td->tmd1_bits & LE_T1_EMORE)
 395                                 dev->stats.collisions += 2;
 396 
 397                         dev->stats.tx_packets++;
 398                 }
 399 
 400                 j = (j + 1) & lp->tx_ring_mod_mask;
 401         }
 402         lp->tx_old = j;
 403         ll->rdp = LE_C0_TINT | LE_C0_INEA;
 404         return 0;
 405 }
 406 
 407 static int lance_tx_buffs_avail(struct lance_private *lp)
 408 {
 409         if (lp->tx_old <= lp->tx_new)
 410                 return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
 411         return lp->tx_old - lp->tx_new - 1;
 412 }
 413 
 414 static irqreturn_t lance_interrupt(int irq, void *dev_id)
 415 {
 416         struct net_device *dev = dev_id;
 417         struct lance_private *lp = netdev_priv(dev);
 418         volatile struct lance_regs *ll = lp->ll;
 419         int csr0;
 420 
 421         ll->rap = LE_CSR0;              /* LANCE Controller Status */
 422         csr0 = ll->rdp;
 423 
 424         if (!(csr0 & LE_C0_INTR))       /* Check if any interrupt has */
 425                 return IRQ_NONE;        /* been generated by the Lance. */
 426 
 427         /* Acknowledge all the interrupt sources ASAP */
 428         ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
 429                            LE_C0_INIT);
 430 
 431         if (csr0 & LE_C0_ERR) {
 432                 /* Clear the error condition */
 433                 ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
 434         }
 435 
 436         if (csr0 & LE_C0_RINT)
 437                 lance_rx(dev);
 438 
 439         if (csr0 & LE_C0_TINT)
 440                 lance_tx(dev);
 441 
 442         /* Log misc errors. */
 443         if (csr0 & LE_C0_BABL)
 444                 dev->stats.tx_errors++;       /* Tx babble. */
 445         if (csr0 & LE_C0_MISS)
 446                 dev->stats.rx_errors++;       /* Missed a Rx frame. */
 447         if (csr0 & LE_C0_MERR) {
 448                 netdev_err(dev, "Bus master arbitration failure, status %04x\n",
 449                            csr0);
 450                 /* Restart the chip. */
 451                 ll->rdp = LE_C0_STRT;
 452         }
 453 
 454         if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
 455                 netif_wake_queue(dev);
 456 
 457         ll->rap = LE_CSR0;
 458         ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
 459                    LE_C0_IDON | LE_C0_INEA);
 460         return IRQ_HANDLED;
 461 }
 462 
 463 static int lance_open(struct net_device *dev)
 464 {
 465         struct lance_private *lp = netdev_priv(dev);
 466         volatile struct lance_regs *ll = lp->ll;
 467         int ret;
 468 
 469         /* Stop the Lance */
 470         ll->rap = LE_CSR0;
 471         ll->rdp = LE_C0_STOP;
 472 
 473         /* Install the Interrupt handler */
 474         ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
 475                           dev->name, dev);
 476         if (ret)
 477                 return ret;
 478 
 479         load_csrs(lp);
 480         lance_init_ring(dev);
 481 
 482         netif_start_queue(dev);
 483 
 484         return init_restart_lance(lp);
 485 }
 486 
 487 static int lance_close(struct net_device *dev)
 488 {
 489         struct lance_private *lp = netdev_priv(dev);
 490         volatile struct lance_regs *ll = lp->ll;
 491 
 492         netif_stop_queue(dev);
 493         del_timer_sync(&lp->multicast_timer);
 494 
 495         /* Stop the card */
 496         ll->rap = LE_CSR0;
 497         ll->rdp = LE_C0_STOP;
 498 
 499         free_irq(IRQ_AMIGA_PORTS, dev);
 500         return 0;
 501 }
 502 
 503 static inline int lance_reset(struct net_device *dev)
 504 {
 505         struct lance_private *lp = netdev_priv(dev);
 506         volatile struct lance_regs *ll = lp->ll;
 507         int status;
 508 
 509         /* Stop the lance */
 510         ll->rap = LE_CSR0;
 511         ll->rdp = LE_C0_STOP;
 512 
 513         load_csrs(lp);
 514 
 515         lance_init_ring(dev);
 516         netif_trans_update(dev); /* prevent tx timeout */
 517         netif_start_queue(dev);
 518 
 519         status = init_restart_lance(lp);
 520         netdev_dbg(dev, "Lance restart=%d\n", status);
 521 
 522         return status;
 523 }
 524 
 525 static void lance_tx_timeout(struct net_device *dev)
 526 {
 527         struct lance_private *lp = netdev_priv(dev);
 528         volatile struct lance_regs *ll = lp->ll;
 529 
 530         netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
 531         lance_reset(dev);
 532         netif_wake_queue(dev);
 533 }
 534 
 535 static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
 536                                     struct net_device *dev)
 537 {
 538         struct lance_private *lp = netdev_priv(dev);
 539         volatile struct lance_regs *ll = lp->ll;
 540         volatile struct lance_init_block *ib = lp->init_block;
 541         int entry, skblen;
 542         int status = NETDEV_TX_OK;
 543         unsigned long flags;
 544 
 545         if (skb_padto(skb, ETH_ZLEN))
 546                 return NETDEV_TX_OK;
 547         skblen = max_t(unsigned, skb->len, ETH_ZLEN);
 548 
 549         local_irq_save(flags);
 550 
 551         if (!lance_tx_buffs_avail(lp))
 552                 goto out_free;
 553 
 554 #ifdef DEBUG
 555         /* dump the packet */
 556         print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
 557                        16, 1, skb->data, 64, true);
 558 #endif
 559         entry = lp->tx_new & lp->tx_ring_mod_mask;
 560         ib->btx_ring[entry].length = (-skblen) | 0xf000;
 561         ib->btx_ring[entry].misc = 0;
 562 
 563         skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
 564 
 565         /* Now, give the packet to the lance */
 566         ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
 567         lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
 568         dev->stats.tx_bytes += skblen;
 569 
 570         if (lance_tx_buffs_avail(lp) <= 0)
 571                 netif_stop_queue(dev);
 572 
 573         /* Kick the lance: transmit now */
 574         ll->rdp = LE_C0_INEA | LE_C0_TDMD;
 575  out_free:
 576         dev_kfree_skb(skb);
 577 
 578         local_irq_restore(flags);
 579 
 580         return status;
 581 }
 582 
 583 /* taken from the depca driver */
 584 static void lance_load_multicast(struct net_device *dev)
 585 {
 586         struct lance_private *lp = netdev_priv(dev);
 587         volatile struct lance_init_block *ib = lp->init_block;
 588         volatile u16 *mcast_table = (u16 *)&ib->filter;
 589         struct netdev_hw_addr *ha;
 590         u32 crc;
 591 
 592         /* set all multicast bits */
 593         if (dev->flags & IFF_ALLMULTI) {
 594                 ib->filter[0] = 0xffffffff;
 595                 ib->filter[1] = 0xffffffff;
 596                 return;
 597         }
 598         /* clear the multicast filter */
 599         ib->filter[0] = 0;
 600         ib->filter[1] = 0;
 601 
 602         /* Add addresses */
 603         netdev_for_each_mc_addr(ha, dev) {
 604                 crc = ether_crc_le(6, ha->addr);
 605                 crc = crc >> 26;
 606                 mcast_table[crc >> 4] |= 1 << (crc & 0xf);
 607         }
 608 }
 609 
 610 static void lance_set_multicast(struct net_device *dev)
 611 {
 612         struct lance_private *lp = netdev_priv(dev);
 613         volatile struct lance_init_block *ib = lp->init_block;
 614         volatile struct lance_regs *ll = lp->ll;
 615 
 616         if (!netif_running(dev))
 617                 return;
 618 
 619         if (lp->tx_old != lp->tx_new) {
 620                 mod_timer(&lp->multicast_timer, jiffies + 4);
 621                 netif_wake_queue(dev);
 622                 return;
 623         }
 624 
 625         netif_stop_queue(dev);
 626 
 627         ll->rap = LE_CSR0;
 628         ll->rdp = LE_C0_STOP;
 629         lance_init_ring(dev);
 630 
 631         if (dev->flags & IFF_PROMISC) {
 632                 ib->mode |= LE_MO_PROM;
 633         } else {
 634                 ib->mode &= ~LE_MO_PROM;
 635                 lance_load_multicast(dev);
 636         }
 637         load_csrs(lp);
 638         init_restart_lance(lp);
 639         netif_wake_queue(dev);
 640 }
 641 
 642 static void lance_set_multicast_retry(struct timer_list *t)
 643 {
 644         struct lance_private *lp = from_timer(lp, t, multicast_timer);
 645 
 646         lance_set_multicast(lp->dev);
 647 }
 648 
 649 static int a2065_init_one(struct zorro_dev *z,
 650                           const struct zorro_device_id *ent);
 651 static void a2065_remove_one(struct zorro_dev *z);
 652 
 653 
 654 static const struct zorro_device_id a2065_zorro_tbl[] = {
 655         { ZORRO_PROD_CBM_A2065_1 },
 656         { ZORRO_PROD_CBM_A2065_2 },
 657         { ZORRO_PROD_AMERISTAR_A2065 },
 658         { 0 }
 659 };
 660 MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
 661 
 662 static struct zorro_driver a2065_driver = {
 663         .name           = "a2065",
 664         .id_table       = a2065_zorro_tbl,
 665         .probe          = a2065_init_one,
 666         .remove         = a2065_remove_one,
 667 };
 668 
 669 static const struct net_device_ops lance_netdev_ops = {
 670         .ndo_open               = lance_open,
 671         .ndo_stop               = lance_close,
 672         .ndo_start_xmit         = lance_start_xmit,
 673         .ndo_tx_timeout         = lance_tx_timeout,
 674         .ndo_set_rx_mode        = lance_set_multicast,
 675         .ndo_validate_addr      = eth_validate_addr,
 676         .ndo_set_mac_address    = eth_mac_addr,
 677 };
 678 
 679 static int a2065_init_one(struct zorro_dev *z,
 680                           const struct zorro_device_id *ent)
 681 {
 682         struct net_device *dev;
 683         struct lance_private *priv;
 684         unsigned long board = z->resource.start;
 685         unsigned long base_addr = board + A2065_LANCE;
 686         unsigned long mem_start = board + A2065_RAM;
 687         struct resource *r1, *r2;
 688         u32 serial;
 689         int err;
 690 
 691         r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
 692                                 "Am7990");
 693         if (!r1)
 694                 return -EBUSY;
 695         r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
 696         if (!r2) {
 697                 release_mem_region(base_addr, sizeof(struct lance_regs));
 698                 return -EBUSY;
 699         }
 700 
 701         dev = alloc_etherdev(sizeof(struct lance_private));
 702         if (dev == NULL) {
 703                 release_mem_region(base_addr, sizeof(struct lance_regs));
 704                 release_mem_region(mem_start, A2065_RAM_SIZE);
 705                 return -ENOMEM;
 706         }
 707 
 708         priv = netdev_priv(dev);
 709 
 710         r1->name = dev->name;
 711         r2->name = dev->name;
 712 
 713         serial = be32_to_cpu(z->rom.er_SerialNumber);
 714         dev->dev_addr[0] = 0x00;
 715         if (z->id != ZORRO_PROD_AMERISTAR_A2065) {      /* Commodore */
 716                 dev->dev_addr[1] = 0x80;
 717                 dev->dev_addr[2] = 0x10;
 718         } else {                                        /* Ameristar */
 719                 dev->dev_addr[1] = 0x00;
 720                 dev->dev_addr[2] = 0x9f;
 721         }
 722         dev->dev_addr[3] = (serial >> 16) & 0xff;
 723         dev->dev_addr[4] = (serial >> 8) & 0xff;
 724         dev->dev_addr[5] = serial & 0xff;
 725         dev->base_addr = (unsigned long)ZTWO_VADDR(base_addr);
 726         dev->mem_start = (unsigned long)ZTWO_VADDR(mem_start);
 727         dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
 728 
 729         priv->ll = (volatile struct lance_regs *)dev->base_addr;
 730         priv->init_block = (struct lance_init_block *)dev->mem_start;
 731         priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
 732         priv->auto_select = 0;
 733         priv->busmaster_regval = LE_C3_BSWP;
 734 
 735         priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
 736         priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
 737         priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
 738         priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
 739         priv->dev = dev;
 740 
 741         dev->netdev_ops = &lance_netdev_ops;
 742         dev->watchdog_timeo = 5*HZ;
 743         dev->dma = 0;
 744 
 745         timer_setup(&priv->multicast_timer, lance_set_multicast_retry, 0);
 746 
 747         err = register_netdev(dev);
 748         if (err) {
 749                 release_mem_region(base_addr, sizeof(struct lance_regs));
 750                 release_mem_region(mem_start, A2065_RAM_SIZE);
 751                 free_netdev(dev);
 752                 return err;
 753         }
 754         zorro_set_drvdata(z, dev);
 755 
 756         netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
 757                     board, dev->dev_addr);
 758 
 759         return 0;
 760 }
 761 
 762 
 763 static void a2065_remove_one(struct zorro_dev *z)
 764 {
 765         struct net_device *dev = zorro_get_drvdata(z);
 766 
 767         unregister_netdev(dev);
 768         release_mem_region(ZTWO_PADDR(dev->base_addr),
 769                            sizeof(struct lance_regs));
 770         release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
 771         free_netdev(dev);
 772 }
 773 
 774 static int __init a2065_init_module(void)
 775 {
 776         return zorro_register_driver(&a2065_driver);
 777 }
 778 
 779 static void __exit a2065_cleanup_module(void)
 780 {
 781         zorro_unregister_driver(&a2065_driver);
 782 }
 783 
 784 module_init(a2065_init_module);
 785 module_exit(a2065_cleanup_module);
 786 
 787 MODULE_LICENSE("GPL");