drivers/net/82596.c

   1 /* 82596.c: A generic 82596 ethernet driver for linux. */
   2 /*
   3    Based on Apricot.c
   4    Written 1994 by Mark Evans.
   5    This driver is for the Apricot 82596 bus-master interface
   6
   7    Modularised 12/94 Mark Evans
   8
   9
  10    Modified to support the 82596 ethernet chips on 680x0 VME boards.
  11    by Richard Hirst <richard@sleepie.demon.co.uk>
  12    Renamed to be 82596.c
  13
  14    980825:  Changed to receive directly in to sk_buffs which are
  15    allocated at open() time.  Eliminates copy on incoming frames
  16    (small ones are still copied).  Shared data now held in a
  17    non-cached page, so we can run on 68060 in copyback mode.
  18
  19    TBD:
  20    * look at deferring rx frames rather than discarding (as per tulip)
  21    * handle tx ring full as per tulip
  22    * performance test to tune rx_copybreak
  23
  24    Most of my modifications relate to the braindead big-endian
  25    implementation by Intel.  When the i596 is operating in
  26    'big-endian' mode, it thinks a 32 bit value of 0x12345678
  27    should be stored as 0x56781234.  This is a real pain, when
  28    you have linked lists which are shared by the 680x0 and the
  29    i596.
  30
  31    Driver skeleton
  32    Written 1993 by Donald Becker.
  33    Copyright 1993 United States Government as represented by the Director,
  34    National Security Agency. This software may only be used and distributed
  35    according to the terms of the GNU General Public License as modified by SRC,
  36    incorporated herein by reference.
  37
  38    The author may be reached as becker@scyld.com, or C/O
  39    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
  40
  41  */
  42
  43 #include <linux/module.h>
  44 #include <linux/kernel.h>
  45 #include <linux/string.h>
  46 #include <linux/errno.h>
  47 #include <linux/ioport.h>
  48 #include <linux/interrupt.h>
  49 #include <linux/delay.h>
  50 #include <linux/netdevice.h>
  51 #include <linux/etherdevice.h>
  52 #include <linux/skbuff.h>
  53 #include <linux/init.h>
  54 #include <linux/bitops.h>
  55 #include <linux/gfp.h>
  56
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/pgtable.h>
  60 #include <asm/cacheflush.h>
  61
  62 static char version[] __initdata =
  63         "82596.c $Revision: 1.5 $\n";
  64
  65 #define DRV_NAME        "82596"
  66
  67 /* DEBUG flags
  68  */
  69
  70 #define DEB_INIT        0x0001
  71 #define DEB_PROBE       0x0002
  72 #define DEB_SERIOUS     0x0004
  73 #define DEB_ERRORS      0x0008
  74 #define DEB_MULTI       0x0010
  75 #define DEB_TDR         0x0020
  76 #define DEB_OPEN        0x0040
  77 #define DEB_RESET       0x0080
  78 #define DEB_ADDCMD      0x0100
  79 #define DEB_STATUS      0x0200
  80 #define DEB_STARTTX     0x0400
  81 #define DEB_RXADDR      0x0800
  82 #define DEB_TXADDR      0x1000
  83 #define DEB_RXFRAME     0x2000
  84 #define DEB_INTS        0x4000
  85 #define DEB_STRUCT      0x8000
  86 #define DEB_ANY         0xffff
  87
  88
  89 #define DEB(x,y)        if (i596_debug & (x)) y
  90
  91
  92 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
  93 #define ENABLE_MVME16x_NET
  94 #endif
  95 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
  96 #define ENABLE_BVME6000_NET
  97 #endif
  98 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
  99 #define ENABLE_APRICOT
 100 #endif
 101
 102 #ifdef ENABLE_MVME16x_NET
 103 #include <asm/mvme16xhw.h>
 104 #endif
 105 #ifdef ENABLE_BVME6000_NET
 106 #include <asm/bvme6000hw.h>
 107 #endif
 108
 109 /*
 110  * Define various macros for Channel Attention, word swapping etc., dependent
 111  * on architecture.  MVME and BVME are 680x0 based, otherwise it is Intel.
 112  */
 113
 114 #ifdef __mc68000__
 115 #define WSWAPrfd(x)  ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 116 #define WSWAPrbd(x)  ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 117 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
 118 #define WSWAPscb(x)  ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 119 #define WSWAPcmd(x)  ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 120 #define WSWAPtbd(x)  ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 121 #define WSWAPchar(x) ((char *)            (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 122 #define ISCP_BUSY       0x00010000
 123 #define MACH_IS_APRICOT 0
 124 #else
 125 #define WSWAPrfd(x)     ((struct i596_rfd *)((long)x))
 126 #define WSWAPrbd(x)     ((struct i596_rbd *)((long)x))
 127 #define WSWAPiscp(x)    ((struct i596_iscp *)((long)x))
 128 #define WSWAPscb(x)     ((struct i596_scb *)((long)x))
 129 #define WSWAPcmd(x)     ((struct i596_cmd *)((long)x))
 130 #define WSWAPtbd(x)     ((struct i596_tbd *)((long)x))
 131 #define WSWAPchar(x)    ((char *)((long)x))
 132 #define ISCP_BUSY       0x0001
 133 #define MACH_IS_APRICOT 1
 134 #endif
 135
 136 /*
 137  * The MPU_PORT command allows direct access to the 82596. With PORT access
 138  * the following commands are available (p5-18). The 32-bit port command
 139  * must be word-swapped with the most significant word written first.
 140  * This only applies to VME boards.
 141  */
 142 #define PORT_RESET              0x00    /* reset 82596 */
 143 #define PORT_SELFTEST           0x01    /* selftest */
 144 #define PORT_ALTSCP             0x02    /* alternate SCB address */
 145 #define PORT_ALTDUMP            0x03    /* Alternate DUMP address */
 146
 147 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
 148
 149 MODULE_AUTHOR("Richard Hirst");
 150 MODULE_DESCRIPTION("i82596 driver");
 151 MODULE_LICENSE("GPL");
 152
 153 module_param(i596_debug, int, 0);
 154 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
 155
 156
 157 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
 158  * a full sized sk_buff.  Value of 100 stolen from tulip.c (!alpha).
 159  */
 160 static int rx_copybreak = 100;
 161
 162 #define PKT_BUF_SZ      1536
 163 #define MAX_MC_CNT      64
 164
 165 #define I596_TOTAL_SIZE 17
 166
 167 #define I596_NULL ((void *)0xffffffff)
 168
 169 #define CMD_EOL         0x8000  /* The last command of the list, stop. */
 170 #define CMD_SUSP        0x4000  /* Suspend after doing cmd. */
 171 #define CMD_INTR        0x2000  /* Interrupt after doing cmd. */
 172
 173 #define CMD_FLEX        0x0008  /* Enable flexible memory model */
 174
 175 enum commands {
 176         CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
 177         CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
 178 };
 179
 180 #define STAT_C          0x8000  /* Set to 0 after execution */
 181 #define STAT_B          0x4000  /* Command being executed */
 182 #define STAT_OK         0x2000  /* Command executed ok */
 183 #define STAT_A          0x1000  /* Command aborted */
 184
 185 #define  CUC_START      0x0100
 186 #define  CUC_RESUME     0x0200
 187 #define  CUC_SUSPEND    0x0300
 188 #define  CUC_ABORT      0x0400
 189 #define  RX_START       0x0010
 190 #define  RX_RESUME      0x0020
 191 #define  RX_SUSPEND     0x0030
 192 #define  RX_ABORT       0x0040
 193
 194 #define TX_TIMEOUT      5
 195
 196
 197 struct i596_reg {
 198         unsigned short porthi;
 199         unsigned short portlo;
 200         unsigned long ca;
 201 };
 202
 203 #define EOF             0x8000
 204 #define SIZE_MASK       0x3fff
 205
 206 struct i596_tbd {
 207         unsigned short size;
 208         unsigned short pad;
 209         struct i596_tbd *next;
 210         char *data;
 211 };
 212
 213 /* The command structure has two 'next' pointers; v_next is the address of
 214  * the next command as seen by the CPU, b_next is the address of the next
 215  * command as seen by the 82596.  The b_next pointer, as used by the 82596
 216  * always references the status field of the next command, rather than the
 217  * v_next field, because the 82596 is unaware of v_next.  It may seem more
 218  * logical to put v_next at the end of the structure, but we cannot do that
 219  * because the 82596 expects other fields to be there, depending on command
 220  * type.
 221  */
 222
 223 struct i596_cmd {
 224         struct i596_cmd *v_next;        /* Address from CPUs viewpoint */
 225         unsigned short status;
 226         unsigned short command;
 227         struct i596_cmd *b_next;        /* Address from i596 viewpoint */
 228 };
 229
 230 struct tx_cmd {
 231         struct i596_cmd cmd;
 232         struct i596_tbd *tbd;
 233         unsigned short size;
 234         unsigned short pad;
 235         struct sk_buff *skb;    /* So we can free it after tx */
 236 };
 237
 238 struct tdr_cmd {
 239         struct i596_cmd cmd;
 240         unsigned short status;
 241         unsigned short pad;
 242 };
 243
 244 struct mc_cmd {
 245         struct i596_cmd cmd;
 246         short mc_cnt;
 247         char mc_addrs[MAX_MC_CNT*6];
 248 };
 249
 250 struct sa_cmd {
 251         struct i596_cmd cmd;
 252         char eth_addr[8];
 253 };
 254
 255 struct cf_cmd {
 256         struct i596_cmd cmd;
 257         char i596_config[16];
 258 };
 259
 260 struct i596_rfd {
 261         unsigned short stat;
 262         unsigned short cmd;
 263         struct i596_rfd *b_next;        /* Address from i596 viewpoint */
 264         struct i596_rbd *rbd;
 265         unsigned short count;
 266         unsigned short size;
 267         struct i596_rfd *v_next;        /* Address from CPUs viewpoint */
 268         struct i596_rfd *v_prev;
 269 };
 270
 271 struct i596_rbd {
 272     unsigned short count;
 273     unsigned short zero1;
 274     struct i596_rbd *b_next;
 275     unsigned char *b_data;              /* Address from i596 viewpoint */
 276     unsigned short size;
 277     unsigned short zero2;
 278     struct sk_buff *skb;
 279     struct i596_rbd *v_next;
 280     struct i596_rbd *b_addr;            /* This rbd addr from i596 view */
 281     unsigned char *v_data;              /* Address from CPUs viewpoint */
 282 };
 283
 284 #define TX_RING_SIZE 64
 285 #define RX_RING_SIZE 16
 286
 287 struct i596_scb {
 288         unsigned short status;
 289         unsigned short command;
 290         struct i596_cmd *cmd;
 291         struct i596_rfd *rfd;
 292         unsigned long crc_err;
 293         unsigned long align_err;
 294         unsigned long resource_err;
 295         unsigned long over_err;
 296         unsigned long rcvdt_err;
 297         unsigned long short_err;
 298         unsigned short t_on;
 299         unsigned short t_off;
 300 };
 301
 302 struct i596_iscp {
 303         unsigned long stat;
 304         struct i596_scb *scb;
 305 };
 306
 307 struct i596_scp {
 308         unsigned long sysbus;
 309         unsigned long pad;
 310         struct i596_iscp *iscp;
 311 };
 312
 313 struct i596_private {
 314         volatile struct i596_scp scp;
 315         volatile struct i596_iscp iscp;
 316         volatile struct i596_scb scb;
 317         struct sa_cmd sa_cmd;
 318         struct cf_cmd cf_cmd;
 319         struct tdr_cmd tdr_cmd;
 320         struct mc_cmd mc_cmd;
 321         unsigned long stat;
 322         int last_restart __attribute__((aligned(4)));
 323         struct i596_rfd *rfd_head;
 324         struct i596_rbd *rbd_head;
 325         struct i596_cmd *cmd_tail;
 326         struct i596_cmd *cmd_head;
 327         int cmd_backlog;
 328         unsigned long last_cmd;
 329         struct i596_rfd rfds[RX_RING_SIZE];
 330         struct i596_rbd rbds[RX_RING_SIZE];
 331         struct tx_cmd tx_cmds[TX_RING_SIZE];
 332         struct i596_tbd tbds[TX_RING_SIZE];
 333         int next_tx_cmd;
 334         spinlock_t lock;
 335 };
 336
 337 static char init_setup[] =
 338 {
 339         0x8E,                   /* length, prefetch on */
 340         0xC8,                   /* fifo to 8, monitor off */
 341 #ifdef CONFIG_VME
 342         0xc0,                   /* don't save bad frames */
 343 #else
 344         0x80,                   /* don't save bad frames */
 345 #endif
 346         0x2E,                   /* No source address insertion, 8 byte preamble */
 347         0x00,                   /* priority and backoff defaults */
 348         0x60,                   /* interframe spacing */
 349         0x00,                   /* slot time LSB */
 350         0xf2,                   /* slot time and retries */
 351         0x00,                   /* promiscuous mode */
 352         0x00,                   /* collision detect */
 353         0x40,                   /* minimum frame length */
 354         0xff,
 355         0x00,
 356         0x7f /*  *multi IA */ };
 357
 358 static int i596_open(struct net_device *dev);
 359 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
 360 static irqreturn_t i596_interrupt(int irq, void *dev_id);
 361 static int i596_close(struct net_device *dev);
 362 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
 363 static void i596_tx_timeout (struct net_device *dev);
 364 static void print_eth(unsigned char *buf, char *str);
 365 static void set_multicast_list(struct net_device *dev);
 366
 367 static int rx_ring_size = RX_RING_SIZE;
 368 static int ticks_limit = 25;
 369 static int max_cmd_backlog = TX_RING_SIZE-1;
 370
 371
 372 static inline void CA(struct net_device *dev)
 373 {
 374 #ifdef ENABLE_MVME16x_NET
 375         if (MACH_IS_MVME16x) {
 376                 ((struct i596_reg *) dev->base_addr)->ca = 1;
 377         }
 378 #endif
 379 #ifdef ENABLE_BVME6000_NET
 380         if (MACH_IS_BVME6000) {
 381                 volatile u32 i;
 382
 383                 i = *(volatile u32 *) (dev->base_addr);
 384         }
 385 #endif
 386 #ifdef ENABLE_APRICOT
 387         if (MACH_IS_APRICOT) {
 388                 outw(0, (short) (dev->base_addr) + 4);
 389         }
 390 #endif
 391 }
 392
 393
 394 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
 395 {
 396 #ifdef ENABLE_MVME16x_NET
 397         if (MACH_IS_MVME16x) {
 398                 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
 399                 p->porthi = ((c) | (u32) (x)) & 0xffff;
 400                 p->portlo = ((c) | (u32) (x)) >> 16;
 401         }
 402 #endif
 403 #ifdef ENABLE_BVME6000_NET
 404         if (MACH_IS_BVME6000) {
 405                 u32 v = (u32) (c) | (u32) (x);
 406                 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
 407                 *(volatile u32 *) dev->base_addr = v;
 408                 udelay(1);
 409                 *(volatile u32 *) dev->base_addr = v;
 410         }
 411 #endif
 412 }
 413
 414
 415 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 416 {
 417         while (--delcnt && lp->iscp.stat)
 418                 udelay(10);
 419         if (!delcnt) {
 420                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 421                      dev->name, str, lp->scb.status, lp->scb.command);
 422                 return -1;
 423         }
 424         else
 425                 return 0;
 426 }
 427
 428
 429 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 430 {
 431         while (--delcnt && lp->scb.command)
 432                 udelay(10);
 433         if (!delcnt) {
 434                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 435                      dev->name, str, lp->scb.status, lp->scb.command);
 436                 return -1;
 437         }
 438         else
 439                 return 0;
 440 }
 441
 442
 443 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
 444 {
 445         volatile struct i596_cmd *c = cmd;
 446
 447         while (--delcnt && c->command)
 448                 udelay(10);
 449         if (!delcnt) {
 450                 printk(KERN_ERR "%s: %s.\n", dev->name, str);
 451                 return -1;
 452         }
 453         else
 454                 return 0;
 455 }
 456
 457
 458 static void i596_display_data(struct net_device *dev)
 459 {
 460         struct i596_private *lp = dev->ml_priv;
 461         struct i596_cmd *cmd;
 462         struct i596_rfd *rfd;
 463         struct i596_rbd *rbd;
 464
 465         printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
 466                &lp->scp, lp->scp.sysbus, lp->scp.iscp);
 467         printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
 468                &lp->iscp, lp->iscp.stat, lp->iscp.scb);
 469         printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
 470                 " .cmd = %p, .rfd = %p\n",
 471                &lp->scb, lp->scb.status, lp->scb.command,
 472                 lp->scb.cmd, lp->scb.rfd);
 473         printk(KERN_ERR "   errors: crc %lx, align %lx, resource %lx,"
 474                " over %lx, rcvdt %lx, short %lx\n",
 475                 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
 476                 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
 477         cmd = lp->cmd_head;
 478         while (cmd != I596_NULL) {
 479                 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
 480                   cmd, cmd->status, cmd->command, cmd->b_next);
 481                 cmd = cmd->v_next;
 482         }
 483         rfd = lp->rfd_head;
 484         printk(KERN_ERR "rfd_head = %p\n", rfd);
 485         do {
 486                 printk(KERN_ERR "   %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
 487                         " count %04x\n",
 488                         rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
 489                         rfd->count);
 490                 rfd = rfd->v_next;
 491         } while (rfd != lp->rfd_head);
 492         rbd = lp->rbd_head;
 493         printk(KERN_ERR "rbd_head = %p\n", rbd);
 494         do {
 495                 printk(KERN_ERR "   %p .count %04x, b_next %p, b_data %p, size %04x\n",
 496                         rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
 497                 rbd = rbd->v_next;
 498         } while (rbd != lp->rbd_head);
 499 }
 500
 501
 502 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 503 static irqreturn_t i596_error(int irq, void *dev_id)
 504 {
 505         struct net_device *dev = dev_id;
 506 #ifdef ENABLE_MVME16x_NET
 507         if (MACH_IS_MVME16x) {
 508                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 509
 510                 pcc2[0x28] = 1;
 511                 pcc2[0x2b] = 0x1d;
 512         }
 513 #endif
 514 #ifdef ENABLE_BVME6000_NET
 515         if (MACH_IS_BVME6000) {
 516                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 517
 518                 *ethirq = 1;
 519                 *ethirq = 3;
 520         }
 521 #endif
 522         printk(KERN_ERR "%s: Error interrupt\n", dev->name);
 523         i596_display_data(dev);
 524         return IRQ_HANDLED;
 525 }
 526 #endif
 527
 528 static inline void remove_rx_bufs(struct net_device *dev)
 529 {
 530         struct i596_private *lp = dev->ml_priv;
 531         struct i596_rbd *rbd;
 532         int i;
 533
 534         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 535                 if (rbd->skb == NULL)
 536                         break;
 537                 dev_kfree_skb(rbd->skb);
 538                 rbd->skb = NULL;
 539         }
 540 }
 541
 542 static inline int init_rx_bufs(struct net_device *dev)
 543 {
 544         struct i596_private *lp = dev->ml_priv;
 545         int i;
 546         struct i596_rfd *rfd;
 547         struct i596_rbd *rbd;
 548
 549         /* First build the Receive Buffer Descriptor List */
 550
 551         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 552                 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
 553
 554                 if (skb == NULL) {
 555                         remove_rx_bufs(dev);
 556                         return -ENOMEM;
 557                 }
 558
 559                 skb->dev = dev;
 560                 rbd->v_next = rbd+1;
 561                 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
 562                 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
 563                 rbd->skb = skb;
 564                 rbd->v_data = skb->data;
 565                 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
 566                 rbd->size = PKT_BUF_SZ;
 567 #ifdef __mc68000__
 568                 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
 569 #endif
 570         }
 571         lp->rbd_head = lp->rbds;
 572         rbd = lp->rbds + rx_ring_size - 1;
 573         rbd->v_next = lp->rbds;
 574         rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
 575
 576         /* Now build the Receive Frame Descriptor List */
 577
 578         for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
 579                 rfd->rbd = I596_NULL;
 580                 rfd->v_next = rfd+1;
 581                 rfd->v_prev = rfd-1;
 582                 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
 583                 rfd->cmd = CMD_FLEX;
 584         }
 585         lp->rfd_head = lp->rfds;
 586         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 587         rfd = lp->rfds;
 588         rfd->rbd = lp->rbd_head;
 589         rfd->v_prev = lp->rfds + rx_ring_size - 1;
 590         rfd = lp->rfds + rx_ring_size - 1;
 591         rfd->v_next = lp->rfds;
 592         rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
 593         rfd->cmd = CMD_EOL|CMD_FLEX;
 594
 595         return 0;
 596 }
 597
 598
 599 static void rebuild_rx_bufs(struct net_device *dev)
 600 {
 601         struct i596_private *lp = dev->ml_priv;
 602         int i;
 603
 604         /* Ensure rx frame/buffer descriptors are tidy */
 605
 606         for (i = 0; i < rx_ring_size; i++) {
 607                 lp->rfds[i].rbd = I596_NULL;
 608                 lp->rfds[i].cmd = CMD_FLEX;
 609         }
 610         lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
 611         lp->rfd_head = lp->rfds;
 612         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 613         lp->rbd_head = lp->rbds;
 614         lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
 615 }
 616
 617
 618 static int init_i596_mem(struct net_device *dev)
 619 {
 620         struct i596_private *lp = dev->ml_priv;
 621 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
 622         short ioaddr = dev->base_addr;
 623 #endif
 624         unsigned long flags;
 625
 626         MPU_PORT(dev, PORT_RESET, NULL);
 627
 628         udelay(100);            /* Wait 100us - seems to help */
 629
 630 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 631 #ifdef ENABLE_MVME16x_NET
 632         if (MACH_IS_MVME16x) {
 633                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 634
 635                 /* Disable all ints for now */
 636                 pcc2[0x28] = 1;
 637                 pcc2[0x2a] = 0x48;
 638                 /* Following disables snooping.  Snooping is not required
 639                  * as we make appropriate use of non-cached pages for
 640                  * shared data, and cache_push/cache_clear.
 641                  */
 642                 pcc2[0x2b] = 0x08;
 643         }
 644 #endif
 645 #ifdef ENABLE_BVME6000_NET
 646         if (MACH_IS_BVME6000) {
 647                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 648
 649                 *ethirq = 1;
 650         }
 651 #endif
 652
 653         /* change the scp address */
 654
 655         MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
 656
 657 #elif defined(ENABLE_APRICOT)
 658
 659         {
 660                 u32 scp = virt_to_bus(&lp->scp);
 661
 662                 /* change the scp address */
 663                 outw(0, ioaddr);
 664                 outw(0, ioaddr);
 665                 outb(4, ioaddr + 0xf);
 666                 outw(scp | 2, ioaddr);
 667                 outw(scp >> 16, ioaddr);
 668         }
 669 #endif
 670
 671         lp->last_cmd = jiffies;
 672
 673 #ifdef ENABLE_MVME16x_NET
 674         if (MACH_IS_MVME16x)
 675                 lp->scp.sysbus = 0x00000054;
 676 #endif
 677 #ifdef ENABLE_BVME6000_NET
 678         if (MACH_IS_BVME6000)
 679                 lp->scp.sysbus = 0x0000004c;
 680 #endif
 681 #ifdef ENABLE_APRICOT
 682         if (MACH_IS_APRICOT)
 683                 lp->scp.sysbus = 0x00440000;
 684 #endif
 685
 686         lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
 687         lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
 688         lp->iscp.stat = ISCP_BUSY;
 689         lp->cmd_backlog = 0;
 690
 691         lp->cmd_head = lp->scb.cmd = I596_NULL;
 692
 693 #ifdef ENABLE_BVME6000_NET
 694         if (MACH_IS_BVME6000) {
 695                 lp->scb.t_on  = 7 * 25;
 696                 lp->scb.t_off = 1 * 25;
 697         }
 698 #endif
 699
 700         DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
 701
 702 #if defined(ENABLE_APRICOT)
 703         (void) inb(ioaddr + 0x10);
 704         outb(4, ioaddr + 0xf);
 705 #endif
 706         CA(dev);
 707
 708         if (wait_istat(dev,lp,1000,"initialization timed out"))
 709                 goto failed;
 710         DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
 711
 712         /* Ensure rx frame/buffer descriptors are tidy */
 713         rebuild_rx_bufs(dev);
 714         lp->scb.command = 0;
 715
 716 #ifdef ENABLE_MVME16x_NET
 717         if (MACH_IS_MVME16x) {
 718                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 719
 720                 /* Enable ints, etc. now */
 721                 pcc2[0x2a] = 0x55;      /* Edge sensitive */
 722                 pcc2[0x2b] = 0x15;
 723         }
 724 #endif
 725 #ifdef ENABLE_BVME6000_NET
 726         if (MACH_IS_BVME6000) {
 727                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 728
 729                 *ethirq = 3;
 730         }
 731 #endif
 732
 733
 734         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
 735         memcpy(lp->cf_cmd.i596_config, init_setup, 14);
 736         lp->cf_cmd.cmd.command = CmdConfigure;
 737         i596_add_cmd(dev, &lp->cf_cmd.cmd);
 738
 739         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
 740         memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
 741         lp->sa_cmd.cmd.command = CmdSASetup;
 742         i596_add_cmd(dev, &lp->sa_cmd.cmd);
 743
 744         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
 745         lp->tdr_cmd.cmd.command = CmdTDR;
 746         i596_add_cmd(dev, &lp->tdr_cmd.cmd);
 747
 748         spin_lock_irqsave (&lp->lock, flags);
 749
 750         if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
 751                 spin_unlock_irqrestore (&lp->lock, flags);
 752                 goto failed;
 753         }
 754         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
 755         lp->scb.command = RX_START;
 756         CA(dev);
 757
 758         spin_unlock_irqrestore (&lp->lock, flags);
 759
 760         if (wait_cmd(dev,lp,1000,"RX_START not processed"))
 761                 goto failed;
 762         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
 763         return 0;
 764
 765 failed:
 766         printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
 767         MPU_PORT(dev, PORT_RESET, NULL);
 768         return -1;
 769 }
 770
 771 static inline int i596_rx(struct net_device *dev)
 772 {
 773         struct i596_private *lp = dev->ml_priv;
 774         struct i596_rfd *rfd;
 775         struct i596_rbd *rbd;
 776         int frames = 0;
 777
 778         DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
 779                         lp->rfd_head, lp->rbd_head));
 780
 781         rfd = lp->rfd_head;             /* Ref next frame to check */
 782
 783         while ((rfd->stat) & STAT_C) {  /* Loop while complete frames */
 784                 if (rfd->rbd == I596_NULL)
 785                         rbd = I596_NULL;
 786                 else if (rfd->rbd == lp->rbd_head->b_addr)
 787                         rbd = lp->rbd_head;
 788                 else {
 789                         printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
 790                         /* XXX Now what? */
 791                         rbd = I596_NULL;
 792                 }
 793                 DEB(DEB_RXFRAME, printk(KERN_DEBUG "  rfd %p, rfd.rbd %p, rfd.stat %04x\n",
 794                         rfd, rfd->rbd, rfd->stat));
 795
 796                 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
 797                         /* a good frame */
 798                         int pkt_len = rbd->count & 0x3fff;
 799                         struct sk_buff *skb = rbd->skb;
 800                         int rx_in_place = 0;
 801
 802                         DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
 803                         frames++;
 804
 805                         /* Check if the packet is long enough to just accept
 806                          * without copying to a properly sized skbuff.
 807                          */
 808
 809                         if (pkt_len > rx_copybreak) {
 810                                 struct sk_buff *newskb;
 811
 812                                 /* Get fresh skbuff to replace filled one. */
 813                                 newskb = dev_alloc_skb(PKT_BUF_SZ);
 814                                 if (newskb == NULL) {
 815                                         skb = NULL;     /* drop pkt */
 816                                         goto memory_squeeze;
 817                                 }
 818                                 /* Pass up the skb already on the Rx ring. */
 819                                 skb_put(skb, pkt_len);
 820                                 rx_in_place = 1;
 821                                 rbd->skb = newskb;
 822                                 newskb->dev = dev;
 823                                 rbd->v_data = newskb->data;
 824                                 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
 825 #ifdef __mc68000__
 826                                 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
 827 #endif
 828                         }
 829                         else
 830                                 skb = dev_alloc_skb(pkt_len + 2);
 831 memory_squeeze:
 832                         if (skb == NULL) {
 833                                 /* XXX tulip.c can defer packets here!! */
 834                                 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
 835                                 dev->stats.rx_dropped++;
 836                         }
 837                         else {
 838                                 if (!rx_in_place) {
 839                                         /* 16 byte align the data fields */
 840                                         skb_reserve(skb, 2);
 841                                         memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
 842                                 }
 843                                 skb->protocol=eth_type_trans(skb,dev);
 844                                 skb->len = pkt_len;
 845 #ifdef __mc68000__
 846                                 cache_clear(virt_to_phys(rbd->skb->data),
 847                                                 pkt_len);
 848 #endif
 849                                 netif_rx(skb);
 850                                 dev->stats.rx_packets++;
 851                                 dev->stats.rx_bytes+=pkt_len;
 852                         }
 853                 }
 854                 else {
 855                         DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
 856                                         dev->name, rfd->stat));
 857                         dev->stats.rx_errors++;
 858                         if ((rfd->stat) & 0x0001)
 859                                 dev->stats.collisions++;
 860                         if ((rfd->stat) & 0x0080)
 861                                 dev->stats.rx_length_errors++;
 862                         if ((rfd->stat) & 0x0100)
 863                                 dev->stats.rx_over_errors++;
 864                         if ((rfd->stat) & 0x0200)
 865                                 dev->stats.rx_fifo_errors++;
 866                         if ((rfd->stat) & 0x0400)
 867                                 dev->stats.rx_frame_errors++;
 868                         if ((rfd->stat) & 0x0800)
 869                                 dev->stats.rx_crc_errors++;
 870                         if ((rfd->stat) & 0x1000)
 871                                 dev->stats.rx_length_errors++;
 872                 }
 873
 874                 /* Clear the buffer descriptor count and EOF + F flags */
 875
 876                 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
 877                         rbd->count = 0;
 878                         lp->rbd_head = rbd->v_next;
 879                 }
 880
 881                 /* Tidy the frame descriptor, marking it as end of list */
 882
 883                 rfd->rbd = I596_NULL;
 884                 rfd->stat = 0;
 885                 rfd->cmd = CMD_EOL|CMD_FLEX;
 886                 rfd->count = 0;
 887
 888                 /* Remove end-of-list from old end descriptor */
 889
 890                 rfd->v_prev->cmd = CMD_FLEX;
 891
 892                 /* Update record of next frame descriptor to process */
 893
 894                 lp->scb.rfd = rfd->b_next;
 895                 lp->rfd_head = rfd->v_next;
 896                 rfd = lp->rfd_head;
 897         }
 898
 899         DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
 900
 901         return 0;
 902 }
 903
 904
 905 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
 906 {
 907         struct i596_cmd *ptr;
 908
 909         while (lp->cmd_head != I596_NULL) {
 910                 ptr = lp->cmd_head;
 911                 lp->cmd_head = ptr->v_next;
 912                 lp->cmd_backlog--;
 913
 914                 switch ((ptr->command) & 0x7) {
 915                 case CmdTx:
 916                         {
 917                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
 918                                 struct sk_buff *skb = tx_cmd->skb;
 919
 920                                 dev_kfree_skb(skb);
 921
 922                                 dev->stats.tx_errors++;
 923                                 dev->stats.tx_aborted_errors++;
 924
 925                                 ptr->v_next = ptr->b_next = I596_NULL;
 926                                 tx_cmd->cmd.command = 0;  /* Mark as free */
 927                                 break;
 928                         }
 929                 default:
 930                         ptr->v_next = ptr->b_next = I596_NULL;
 931                 }
 932         }
 933
 934         wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
 935         lp->scb.cmd = I596_NULL;
 936 }
 937
 938 static void i596_reset(struct net_device *dev, struct i596_private *lp,
 939                         int ioaddr)
 940 {
 941         unsigned long flags;
 942
 943         DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
 944
 945         spin_lock_irqsave (&lp->lock, flags);
 946
 947         wait_cmd(dev,lp,100,"i596_reset timed out");
 948
 949         netif_stop_queue(dev);
 950
 951         lp->scb.command = CUC_ABORT | RX_ABORT;
 952         CA(dev);
 953
 954         /* wait for shutdown */
 955         wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
 956         spin_unlock_irqrestore (&lp->lock, flags);
 957
 958         i596_cleanup_cmd(dev,lp);
 959         i596_rx(dev);
 960
 961         netif_start_queue(dev);
 962         init_i596_mem(dev);
 963 }
 964
 965 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
 966 {
 967         struct i596_private *lp = dev->ml_priv;
 968         int ioaddr = dev->base_addr;
 969         unsigned long flags;
 970
 971         DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
 972
 973         cmd->status = 0;
 974         cmd->command |= (CMD_EOL | CMD_INTR);
 975         cmd->v_next = cmd->b_next = I596_NULL;
 976
 977         spin_lock_irqsave (&lp->lock, flags);
 978
 979         if (lp->cmd_head != I596_NULL) {
 980                 lp->cmd_tail->v_next = cmd;
 981                 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
 982         } else {
 983                 lp->cmd_head = cmd;
 984                 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
 985                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
 986                 lp->scb.command = CUC_START;
 987                 CA(dev);
 988         }
 989         lp->cmd_tail = cmd;
 990         lp->cmd_backlog++;
 991
 992         spin_unlock_irqrestore (&lp->lock, flags);
 993
 994         if (lp->cmd_backlog > max_cmd_backlog) {
 995                 unsigned long tickssofar = jiffies - lp->last_cmd;
 996
 997                 if (tickssofar < ticks_limit)
 998                         return;
 999
1000                 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
1001
1002                 i596_reset(dev, lp, ioaddr);
1003         }
1004 }
1005
1006 static int i596_open(struct net_device *dev)
1007 {
1008         int res = 0;
1009
1010         DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1011
1012         if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1013                 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1014                 return -EAGAIN;
1015         }
1016 #ifdef ENABLE_MVME16x_NET
1017         if (MACH_IS_MVME16x) {
1018                 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
1019                         res = -EAGAIN;
1020                         goto err_irq_dev;
1021                 }
1022         }
1023 #endif
1024         res = init_rx_bufs(dev);
1025         if (res)
1026                 goto err_irq_56;
1027
1028         netif_start_queue(dev);
1029
1030         if (init_i596_mem(dev)) {
1031                 res = -EAGAIN;
1032                 goto err_queue;
1033         }
1034
1035         return 0;
1036
1037 err_queue:
1038         netif_stop_queue(dev);
1039         remove_rx_bufs(dev);
1040 err_irq_56:
1041 #ifdef ENABLE_MVME16x_NET
1042         free_irq(0x56, dev);
1043 err_irq_dev:
1044 #endif
1045         free_irq(dev->irq, dev);
1046
1047         return res;
1048 }
1049
1050 static void i596_tx_timeout (struct net_device *dev)
1051 {
1052         struct i596_private *lp = dev->ml_priv;
1053         int ioaddr = dev->base_addr;
1054
1055         /* Transmitter timeout, serious problems. */
1056         DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1057                         dev->name));
1058
1059         dev->stats.tx_errors++;
1060
1061         /* Try to restart the adaptor */
1062         if (lp->last_restart == dev->stats.tx_packets) {
1063                 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1064                 /* Shutdown and restart */
1065                 i596_reset (dev, lp, ioaddr);
1066         } else {
1067                 /* Issue a channel attention signal */
1068                 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1069                 lp->scb.command = CUC_START | RX_START;
1070                 CA (dev);
1071                 lp->last_restart = dev->stats.tx_packets;
1072         }
1073
1074         dev->trans_start = jiffies; /* prevent tx timeout */
1075         netif_wake_queue (dev);
1076 }
1077
1078 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1079 {
1080         struct i596_private *lp = dev->ml_priv;
1081         struct tx_cmd *tx_cmd;
1082         struct i596_tbd *tbd;
1083         short length = skb->len;
1084
1085         DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1086                                 dev->name, skb->len, skb->data));
1087
1088         if (skb->len < ETH_ZLEN) {
1089                 if (skb_padto(skb, ETH_ZLEN))
1090                         return NETDEV_TX_OK;
1091                 length = ETH_ZLEN;
1092         }
1093         netif_stop_queue(dev);
1094
1095         tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1096         tbd = lp->tbds + lp->next_tx_cmd;
1097
1098         if (tx_cmd->cmd.command) {
1099                 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1100                                 dev->name);
1101                 dev->stats.tx_dropped++;
1102
1103                 dev_kfree_skb(skb);
1104         } else {
1105                 if (++lp->next_tx_cmd == TX_RING_SIZE)
1106                         lp->next_tx_cmd = 0;
1107                 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1108                 tbd->next = I596_NULL;
1109
1110                 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1111                 tx_cmd->skb = skb;
1112
1113                 tx_cmd->pad = 0;
1114                 tx_cmd->size = 0;
1115                 tbd->pad = 0;
1116                 tbd->size = EOF | length;
1117
1118                 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1119
1120 #ifdef __mc68000__
1121                 cache_push(virt_to_phys(skb->data), length);
1122 #endif
1123                 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1124                 i596_add_cmd(dev, &tx_cmd->cmd);
1125
1126                 dev->stats.tx_packets++;
1127                 dev->stats.tx_bytes += length;
1128         }
1129
1130         netif_start_queue(dev);
1131
1132         return NETDEV_TX_OK;
1133 }
1134
1135 static void print_eth(unsigned char *add, char *str)
1136 {
1137         printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1138                add, add + 6, add, add[12], add[13], str);
1139 }
1140
1141 static int io = 0x300;
1142 static int irq = 10;
1143
1144 static const struct net_device_ops i596_netdev_ops = {
1145         .ndo_open               = i596_open,
1146         .ndo_stop               = i596_close,
1147         .ndo_start_xmit         = i596_start_xmit,
1148         .ndo_set_multicast_list = set_multicast_list,
1149         .ndo_tx_timeout         = i596_tx_timeout,
1150         .ndo_change_mtu         = eth_change_mtu,
1151         .ndo_set_mac_address    = eth_mac_addr,
1152         .ndo_validate_addr      = eth_validate_addr,
1153 };
1154
1155 struct net_device * __init i82596_probe(int unit)
1156 {
1157         struct net_device *dev;
1158         int i;
1159         struct i596_private *lp;
1160         char eth_addr[8];
1161         static int probed;
1162         int err;
1163
1164         if (probed)
1165                 return ERR_PTR(-ENODEV);
1166         probed++;
1167
1168         dev = alloc_etherdev(0);
1169         if (!dev)
1170                 return ERR_PTR(-ENOMEM);
1171
1172         if (unit >= 0) {
1173                 sprintf(dev->name, "eth%d", unit);
1174                 netdev_boot_setup_check(dev);
1175         } else {
1176                 dev->base_addr = io;
1177                 dev->irq = irq;
1178         }
1179
1180 #ifdef ENABLE_MVME16x_NET
1181         if (MACH_IS_MVME16x) {
1182                 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1183                         printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1184                         err = -ENODEV;
1185                         goto out;
1186                 }
1187                 memcpy(eth_addr, (void *) 0xfffc1f2c, 6);       /* YUCK! Get addr from NOVRAM */
1188                 dev->base_addr = MVME_I596_BASE;
1189                 dev->irq = (unsigned) MVME16x_IRQ_I596;
1190                 goto found;
1191         }
1192 #endif
1193 #ifdef ENABLE_BVME6000_NET
1194         if (MACH_IS_BVME6000) {
1195                 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1196                 unsigned char msr = rtc[3];
1197                 int i;
1198
1199                 rtc[3] |= 0x80;
1200                 for (i = 0; i < 6; i++)
1201                         eth_addr[i] = rtc[i * 4 + 7];   /* Stored in RTC RAM at offset 1 */
1202                 rtc[3] = msr;
1203                 dev->base_addr = BVME_I596_BASE;
1204                 dev->irq = (unsigned) BVME_IRQ_I596;
1205                 goto found;
1206         }
1207 #endif
1208 #ifdef ENABLE_APRICOT
1209         {
1210                 int checksum = 0;
1211                 int ioaddr = 0x300;
1212
1213                 /* this is easy the ethernet interface can only be at 0x300 */
1214                 /* first check nothing is already registered here */
1215
1216                 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1217                         printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1218                         err = -EBUSY;
1219                         goto out;
1220                 }
1221
1222                 dev->base_addr = ioaddr;
1223
1224                 for (i = 0; i < 8; i++) {
1225                         eth_addr[i] = inb(ioaddr + 8 + i);
1226                         checksum += eth_addr[i];
1227                 }
1228
1229                 /* checksum is a multiple of 0x100, got this wrong first time
1230                    some machines have 0x100, some 0x200. The DOS driver doesn't
1231                    even bother with the checksum.
1232                    Some other boards trip the checksum.. but then appear as
1233                    ether address 0. Trap these - AC */
1234
1235                 if ((checksum % 0x100) ||
1236                     (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1237                         err = -ENODEV;
1238                         goto out1;
1239                 }
1240
1241                 dev->irq = 10;
1242                 goto found;
1243         }
1244 #endif
1245         err = -ENODEV;
1246         goto out;
1247
1248 found:
1249         dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1250         if (!dev->mem_start) {
1251                 err = -ENOMEM;
1252                 goto out1;
1253         }
1254
1255         DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1256
1257         for (i = 0; i < 6; i++)
1258                 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1259
1260         DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1261
1262         DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1263
1264         /* The 82596-specific entries in the device structure. */
1265         dev->netdev_ops = &i596_netdev_ops;
1266         dev->watchdog_timeo = TX_TIMEOUT;
1267
1268         dev->ml_priv = (void *)(dev->mem_start);
1269
1270         lp = dev->ml_priv;
1271         DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1272                         "lp->scb at 0x%08lx\n",
1273                         dev->name, (unsigned long)lp,
1274                         sizeof(struct i596_private), (unsigned long)&lp->scb));
1275         memset((void *) lp, 0, sizeof(struct i596_private));
1276
1277 #ifdef __mc68000__
1278         cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1279         cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1280         kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1281 #endif
1282         lp->scb.command = 0;
1283         lp->scb.cmd = I596_NULL;
1284         lp->scb.rfd = I596_NULL;
1285         spin_lock_init(&lp->lock);
1286
1287         err = register_netdev(dev);
1288         if (err)
1289                 goto out2;
1290         return dev;
1291 out2:
1292 #ifdef __mc68000__
1293         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1294          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1295          */
1296         kernel_set_cachemode((void *)(dev->mem_start), 4096,
1297                         IOMAP_FULL_CACHING);
1298 #endif
1299         free_page ((u32)(dev->mem_start));
1300 out1:
1301 #ifdef ENABLE_APRICOT
1302         release_region(dev->base_addr, I596_TOTAL_SIZE);
1303 #endif
1304 out:
1305         free_netdev(dev);
1306         return ERR_PTR(err);
1307 }
1308
1309 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1310 {
1311         struct net_device *dev = dev_id;
1312         struct i596_private *lp;
1313         short ioaddr;
1314         unsigned short status, ack_cmd = 0;
1315         int handled = 0;
1316
1317 #ifdef ENABLE_BVME6000_NET
1318         if (MACH_IS_BVME6000) {
1319                 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1320                         i596_error(irq, dev_id);
1321                         return IRQ_HANDLED;
1322                 }
1323         }
1324 #endif
1325         if (dev == NULL) {
1326                 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1327                 return IRQ_NONE;
1328         }
1329
1330         ioaddr = dev->base_addr;
1331         lp = dev->ml_priv;
1332
1333         spin_lock (&lp->lock);
1334
1335         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1336         status = lp->scb.status;
1337
1338         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1339                         dev->name, irq, status));
1340
1341         ack_cmd = status & 0xf000;
1342
1343         if ((status & 0x8000) || (status & 0x2000)) {
1344                 struct i596_cmd *ptr;
1345
1346                 handled = 1;
1347                 if ((status & 0x8000))
1348                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1349                 if ((status & 0x2000))
1350                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1351
1352                 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1353                         ptr = lp->cmd_head;
1354
1355                         DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1356                                        lp->cmd_head->status, lp->cmd_head->command));
1357                         lp->cmd_head = ptr->v_next;
1358                         lp->cmd_backlog--;
1359
1360                         switch ((ptr->command) & 0x7) {
1361                         case CmdTx:
1362                             {
1363                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1364                                 struct sk_buff *skb = tx_cmd->skb;
1365
1366                                 if ((ptr->status) & STAT_OK) {
1367                                         DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1368                                 } else {
1369                                         dev->stats.tx_errors++;
1370                                         if ((ptr->status) & 0x0020)
1371                                                 dev->stats.collisions++;
1372                                         if (!((ptr->status) & 0x0040))
1373                                                 dev->stats.tx_heartbeat_errors++;
1374                                         if ((ptr->status) & 0x0400)
1375                                                 dev->stats.tx_carrier_errors++;
1376                                         if ((ptr->status) & 0x0800)
1377                                                 dev->stats.collisions++;
1378                                         if ((ptr->status) & 0x1000)
1379                                                 dev->stats.tx_aborted_errors++;
1380                                 }
1381
1382                                 dev_kfree_skb_irq(skb);
1383
1384                                 tx_cmd->cmd.command = 0; /* Mark free */
1385                                 break;
1386                             }
1387                         case CmdTDR:
1388                             {
1389                                 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1390
1391                                 if (status & 0x8000) {
1392                                         DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1393                                 } else {
1394                                         if (status & 0x4000)
1395                                                 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1396                                         if (status & 0x2000)
1397                                                 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1398                                         if (status & 0x1000)
1399                                                 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1400
1401                                         DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1402                                 }
1403                                 break;
1404                             }
1405                         case CmdConfigure:
1406                         case CmdMulticastList:
1407                                 /* Zap command so set_multicast_list() knows it is free */
1408                                 ptr->command = 0;
1409                                 break;
1410                         }
1411                         ptr->v_next = ptr->b_next = I596_NULL;
1412                         lp->last_cmd = jiffies;
1413                 }
1414
1415                 ptr = lp->cmd_head;
1416                 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1417                         ptr->command &= 0x1fff;
1418                         ptr = ptr->v_next;
1419                 }
1420
1421                 if ((lp->cmd_head != I596_NULL))
1422                         ack_cmd |= CUC_START;
1423                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1424         }
1425         if ((status & 0x1000) || (status & 0x4000)) {
1426                 if ((status & 0x4000))
1427                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1428                 i596_rx(dev);
1429                 /* Only RX_START if stopped - RGH 07-07-96 */
1430                 if (status & 0x1000) {
1431                         if (netif_running(dev)) {
1432                                 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1433                                 ack_cmd |= RX_START;
1434                                 dev->stats.rx_errors++;
1435                                 dev->stats.rx_fifo_errors++;
1436                                 rebuild_rx_bufs(dev);
1437                         }
1438                 }
1439         }
1440         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1441         lp->scb.command = ack_cmd;
1442
1443 #ifdef ENABLE_MVME16x_NET
1444         if (MACH_IS_MVME16x) {
1445                 /* Ack the interrupt */
1446
1447                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1448
1449                 pcc2[0x2a] |= 0x08;
1450         }
1451 #endif
1452 #ifdef ENABLE_BVME6000_NET
1453         if (MACH_IS_BVME6000) {
1454                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1455
1456                 *ethirq = 1;
1457                 *ethirq = 3;
1458         }
1459 #endif
1460 #ifdef ENABLE_APRICOT
1461         (void) inb(ioaddr + 0x10);
1462         outb(4, ioaddr + 0xf);
1463 #endif
1464         CA(dev);
1465
1466         DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1467
1468         spin_unlock (&lp->lock);
1469         return IRQ_RETVAL(handled);
1470 }
1471
1472 static int i596_close(struct net_device *dev)
1473 {
1474         struct i596_private *lp = dev->ml_priv;
1475         unsigned long flags;
1476
1477         netif_stop_queue(dev);
1478
1479         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1480                        dev->name, lp->scb.status));
1481
1482         spin_lock_irqsave(&lp->lock, flags);
1483
1484         wait_cmd(dev,lp,100,"close1 timed out");
1485         lp->scb.command = CUC_ABORT | RX_ABORT;
1486         CA(dev);
1487
1488         wait_cmd(dev,lp,100,"close2 timed out");
1489
1490         spin_unlock_irqrestore(&lp->lock, flags);
1491         DEB(DEB_STRUCT,i596_display_data(dev));
1492         i596_cleanup_cmd(dev,lp);
1493
1494 #ifdef ENABLE_MVME16x_NET
1495         if (MACH_IS_MVME16x) {
1496                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1497
1498                 /* Disable all ints */
1499                 pcc2[0x28] = 1;
1500                 pcc2[0x2a] = 0x40;
1501                 pcc2[0x2b] = 0x40;      /* Set snooping bits now! */
1502         }
1503 #endif
1504 #ifdef ENABLE_BVME6000_NET
1505         if (MACH_IS_BVME6000) {
1506                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1507
1508                 *ethirq = 1;
1509         }
1510 #endif
1511
1512 #ifdef ENABLE_MVME16x_NET
1513         free_irq(0x56, dev);
1514 #endif
1515         free_irq(dev->irq, dev);
1516         remove_rx_bufs(dev);
1517
1518         return 0;
1519 }
1520
1521 /*
1522  *    Set or clear the multicast filter for this adaptor.
1523  */
1524
1525 static void set_multicast_list(struct net_device *dev)
1526 {
1527         struct i596_private *lp = dev->ml_priv;
1528         int config = 0, cnt;
1529
1530         DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1531                 dev->name, netdev_mc_count(dev),
1532                 dev->flags & IFF_PROMISC  ? "ON" : "OFF",
1533                 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1534
1535         if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1536                 return;
1537
1538         if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1539                 lp->cf_cmd.i596_config[8] |= 0x01;
1540                 config = 1;
1541         }
1542         if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1543                 lp->cf_cmd.i596_config[8] &= ~0x01;
1544                 config = 1;
1545         }
1546         if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1547                 lp->cf_cmd.i596_config[11] &= ~0x20;
1548                 config = 1;
1549         }
1550         if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1551                 lp->cf_cmd.i596_config[11] |= 0x20;
1552                 config = 1;
1553         }
1554         if (config) {
1555                 lp->cf_cmd.cmd.command = CmdConfigure;
1556                 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1557         }
1558
1559         cnt = netdev_mc_count(dev);
1560         if (cnt > MAX_MC_CNT)
1561         {
1562                 cnt = MAX_MC_CNT;
1563                 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1564                         dev->name, cnt);
1565         }
1566
1567         if (!netdev_mc_empty(dev)) {
1568                 struct netdev_hw_addr *ha;
1569                 unsigned char *cp;
1570                 struct mc_cmd *cmd;
1571
1572                 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1573                         return;
1574                 cmd = &lp->mc_cmd;
1575                 cmd->cmd.command = CmdMulticastList;
1576                 cmd->mc_cnt = cnt * ETH_ALEN;
1577                 cp = cmd->mc_addrs;
1578                 netdev_for_each_mc_addr(ha, dev) {
1579                         if (!cnt--)
1580                                 break;
1581                         memcpy(cp, ha->addr, ETH_ALEN);
1582                         if (i596_debug > 1)
1583                                 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1584                                                 dev->name, cp));
1585                         cp += ETH_ALEN;
1586                 }
1587                 i596_add_cmd(dev, &cmd->cmd);
1588         }
1589 }
1590
1591 #ifdef MODULE
1592 static struct net_device *dev_82596;
1593
1594 #ifdef ENABLE_APRICOT
1595 module_param(irq, int, 0);
1596 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1597 #endif
1598
1599 static int debug = -1;
1600 module_param(debug, int, 0);
1601 MODULE_PARM_DESC(debug, "i82596 debug mask");
1602
1603 int __init init_module(void)
1604 {
1605         if (debug >= 0)
1606                 i596_debug = debug;
1607         dev_82596 = i82596_probe(-1);
1608         if (IS_ERR(dev_82596))
1609                 return PTR_ERR(dev_82596);
1610         return 0;
1611 }
1612
1613 void __exit cleanup_module(void)
1614 {
1615         unregister_netdev(dev_82596);
1616 #ifdef __mc68000__
1617         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1618          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1619          */
1620
1621         kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1622                         IOMAP_FULL_CACHING);
1623 #endif
1624         free_page ((u32)(dev_82596->mem_start));
1625 #ifdef ENABLE_APRICOT
1626         /* If we don't do this, we can't re-insmod it later. */
1627         release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1628 #endif
1629         free_netdev(dev_82596);
1630 }
1631
1632 #endif                          /* MODULE */