drivers/atm/zatm.c

   1 /* drivers/atm/zatm.c - ZeitNet ZN122x device driver */
   2
   3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6 #include <linux/module.h>
   7 #include <linux/kernel.h>
   8 #include <linux/mm.h>
   9 #include <linux/pci.h>
  10 #include <linux/errno.h>
  11 #include <linux/atm.h>
  12 #include <linux/atmdev.h>
  13 #include <linux/sonet.h>
  14 #include <linux/skbuff.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/delay.h>
  17 #include <linux/uio.h>
  18 #include <linux/init.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/atm_zatm.h>
  22 #include <linux/capability.h>
  23 #include <linux/bitops.h>
  24 #include <linux/wait.h>
  25 #include <linux/slab.h>
  26 #include <asm/byteorder.h>
  27 #include <asm/string.h>
  28 #include <asm/io.h>
  29 #include <linux/atomic.h>
  30 #include <asm/uaccess.h>
  31
  32 #include "uPD98401.h"
  33 #include "uPD98402.h"
  34 #include "zeprom.h"
  35 #include "zatm.h"
  36
  37
  38 /*
  39  * TODO:
  40  *
  41  * Minor features
  42  *  - support 64 kB SDUs (will have to use multibuffer batches then :-( )
  43  *  - proper use of CDV, credit = max(1,CDVT*PCR)
  44  *  - AAL0
  45  *  - better receive timestamps
  46  *  - OAM
  47  */
  48
  49 #define ZATM_COPPER     1
  50
  51 #if 0
  52 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  53 #else
  54 #define DPRINTK(format,args...)
  55 #endif
  56
  57 #ifndef CONFIG_ATM_ZATM_DEBUG
  58
  59
  60 #define NULLCHECK(x)
  61
  62 #define EVENT(s,a,b)
  63
  64
  65 static void event_dump(void)
  66 {
  67 }
  68
  69
  70 #else
  71
  72
  73 /*
  74  * NULL pointer checking
  75  */
  76
  77 #define NULLCHECK(x) \
  78   if ((unsigned long) (x) < 0x30) printk(KERN_CRIT #x "==0x%x\n", (int) (x))
  79
  80 /*
  81  * Very extensive activity logging. Greatly improves bug detection speed but
  82  * costs a few Mbps if enabled.
  83  */
  84
  85 #define EV 64
  86
  87 static const char *ev[EV];
  88 static unsigned long ev_a[EV],ev_b[EV];
  89 static int ec = 0;
  90
  91
  92 static void EVENT(const char *s,unsigned long a,unsigned long b)
  93 {
  94         ev[ec] = s;
  95         ev_a[ec] = a;
  96         ev_b[ec] = b;
  97         ec = (ec+1) % EV;
  98 }
  99
 100
 101 static void event_dump(void)
 102 {
 103         int n,i;
 104
 105         printk(KERN_NOTICE "----- event dump follows -----\n");
 106         for (n = 0; n < EV; n++) {
 107                 i = (ec+n) % EV;
 108                 printk(KERN_NOTICE);
 109                 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 110         }
 111         printk(KERN_NOTICE "----- event dump ends here -----\n");
 112 }
 113
 114
 115 #endif /* CONFIG_ATM_ZATM_DEBUG */
 116
 117
 118 #define RING_BUSY       1       /* indication from do_tx that PDU has to be
 119                                    backlogged */
 120
 121 static struct atm_dev *zatm_boards = NULL;
 122 static unsigned long dummy[2] = {0,0};
 123
 124
 125 #define zin_n(r) inl(zatm_dev->base+r*4)
 126 #define zin(r) inl(zatm_dev->base+uPD98401_##r*4)
 127 #define zout(v,r) outl(v,zatm_dev->base+uPD98401_##r*4)
 128 #define zwait while (zin(CMR) & uPD98401_BUSY)
 129
 130 /* RX0, RX1, TX0, TX1 */
 131 static const int mbx_entries[NR_MBX] = { 1024,1024,1024,1024 };
 132 static const int mbx_esize[NR_MBX] = { 16,16,4,4 }; /* entry size in bytes */
 133
 134 #define MBX_SIZE(i) (mbx_entries[i]*mbx_esize[i])
 135
 136
 137 /*-------------------------------- utilities --------------------------------*/
 138
 139
 140 static void zpokel(struct zatm_dev *zatm_dev,u32 value,u32 addr)
 141 {
 142         zwait;
 143         zout(value,CER);
 144         zout(uPD98401_IND_ACC | uPD98401_IA_BALL |
 145             (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
 146 }
 147
 148
 149 static u32 zpeekl(struct zatm_dev *zatm_dev,u32 addr)
 150 {
 151         zwait;
 152         zout(uPD98401_IND_ACC | uPD98401_IA_BALL | uPD98401_IA_RW |
 153           (uPD98401_IA_TGT_CM << uPD98401_IA_TGT_SHIFT) | addr,CMR);
 154         zwait;
 155         return zin(CER);
 156 }
 157
 158
 159 /*------------------------------- free lists --------------------------------*/
 160
 161
 162 /*
 163  * Free buffer head structure:
 164  *   [0] pointer to buffer (for SAR)
 165  *   [1] buffer descr link pointer (for SAR)
 166  *   [2] back pointer to skb (for poll_rx)
 167  *   [3] data
 168  *   ...
 169  */
 170
 171 struct rx_buffer_head {
 172         u32             buffer; /* pointer to buffer (for SAR) */
 173         u32             link;   /* buffer descriptor link pointer (for SAR) */
 174         struct sk_buff  *skb;   /* back pointer to skb (for poll_rx) */
 175 };
 176
 177
 178 static void refill_pool(struct atm_dev *dev,int pool)
 179 {
 180         struct zatm_dev *zatm_dev;
 181         struct sk_buff *skb;
 182         struct rx_buffer_head *first;
 183         unsigned long flags;
 184         int align,offset,free,count,size;
 185
 186         EVENT("refill_pool\n",0,0);
 187         zatm_dev = ZATM_DEV(dev);
 188         size = (64 << (pool <= ZATM_AAL5_POOL_BASE ? 0 :
 189             pool-ZATM_AAL5_POOL_BASE))+sizeof(struct rx_buffer_head);
 190         if (size < PAGE_SIZE) {
 191                 align = 32; /* for 32 byte alignment */
 192                 offset = sizeof(struct rx_buffer_head);
 193         }
 194         else {
 195                 align = 4096;
 196                 offset = zatm_dev->pool_info[pool].offset+
 197                     sizeof(struct rx_buffer_head);
 198         }
 199         size += align;
 200         spin_lock_irqsave(&zatm_dev->lock, flags);
 201         free = zpeekl(zatm_dev,zatm_dev->pool_base+2*pool) &
 202             uPD98401_RXFP_REMAIN;
 203         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 204         if (free >= zatm_dev->pool_info[pool].low_water) return;
 205         EVENT("starting ... POOL: 0x%x, 0x%x\n",
 206             zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
 207             zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
 208         EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
 209         count = 0;
 210         first = NULL;
 211         while (free < zatm_dev->pool_info[pool].high_water) {
 212                 struct rx_buffer_head *head;
 213
 214                 skb = alloc_skb(size,GFP_ATOMIC);
 215                 if (!skb) {
 216                         printk(KERN_WARNING DEV_LABEL "(Itf %d): got no new "
 217                             "skb (%d) with %d free\n",dev->number,size,free);
 218                         break;
 219                 }
 220                 skb_reserve(skb,(unsigned char *) ((((unsigned long) skb->data+
 221                     align+offset-1) & ~(unsigned long) (align-1))-offset)-
 222                     skb->data);
 223                 head = (struct rx_buffer_head *) skb->data;
 224                 skb_reserve(skb,sizeof(struct rx_buffer_head));
 225                 if (!first) first = head;
 226                 count++;
 227                 head->buffer = virt_to_bus(skb->data);
 228                 head->link = 0;
 229                 head->skb = skb;
 230                 EVENT("enq skb 0x%08lx/0x%08lx\n",(unsigned long) skb,
 231                     (unsigned long) head);
 232                 spin_lock_irqsave(&zatm_dev->lock, flags);
 233                 if (zatm_dev->last_free[pool])
 234                         ((struct rx_buffer_head *) (zatm_dev->last_free[pool]->
 235                             data))[-1].link = virt_to_bus(head);
 236                 zatm_dev->last_free[pool] = skb;
 237                 skb_queue_tail(&zatm_dev->pool[pool],skb);
 238                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
 239                 free++;
 240         }
 241         if (first) {
 242                 spin_lock_irqsave(&zatm_dev->lock, flags);
 243                 zwait;
 244                 zout(virt_to_bus(first),CER);
 245                 zout(uPD98401_ADD_BAT | (pool << uPD98401_POOL_SHIFT) | count,
 246                     CMR);
 247                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
 248                 EVENT ("POOL: 0x%x, 0x%x\n",
 249                     zpeekl(zatm_dev,zatm_dev->pool_base+2*pool),
 250                     zpeekl(zatm_dev,zatm_dev->pool_base+2*pool+1));
 251                 EVENT("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
 252         }
 253 }
 254
 255
 256 static void drain_free(struct atm_dev *dev,int pool)
 257 {
 258         skb_queue_purge(&ZATM_DEV(dev)->pool[pool]);
 259 }
 260
 261
 262 static int pool_index(int max_pdu)
 263 {
 264         int i;
 265
 266         if (max_pdu % ATM_CELL_PAYLOAD)
 267                 printk(KERN_ERR DEV_LABEL ": driver error in pool_index: "
 268                     "max_pdu is %d\n",max_pdu);
 269         if (max_pdu > 65536) return -1;
 270         for (i = 0; (64 << i) < max_pdu; i++);
 271         return i+ZATM_AAL5_POOL_BASE;
 272 }
 273
 274
 275 /* use_pool isn't reentrant */
 276
 277
 278 static void use_pool(struct atm_dev *dev,int pool)
 279 {
 280         struct zatm_dev *zatm_dev;
 281         unsigned long flags;
 282         int size;
 283
 284         zatm_dev = ZATM_DEV(dev);
 285         if (!(zatm_dev->pool_info[pool].ref_count++)) {
 286                 skb_queue_head_init(&zatm_dev->pool[pool]);
 287                 size = pool-ZATM_AAL5_POOL_BASE;
 288                 if (size < 0) size = 0; /* 64B... */
 289                 else if (size > 10) size = 10; /* ... 64kB */
 290                 spin_lock_irqsave(&zatm_dev->lock, flags);
 291                 zpokel(zatm_dev,((zatm_dev->pool_info[pool].low_water/4) <<
 292                     uPD98401_RXFP_ALERT_SHIFT) |
 293                     (1 << uPD98401_RXFP_BTSZ_SHIFT) |
 294                     (size << uPD98401_RXFP_BFSZ_SHIFT),
 295                     zatm_dev->pool_base+pool*2);
 296                 zpokel(zatm_dev,(unsigned long) dummy,zatm_dev->pool_base+
 297                     pool*2+1);
 298                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
 299                 zatm_dev->last_free[pool] = NULL;
 300                 refill_pool(dev,pool);
 301         }
 302         DPRINTK("pool %d: %d\n",pool,zatm_dev->pool_info[pool].ref_count);
 303 }
 304
 305
 306 static void unuse_pool(struct atm_dev *dev,int pool)
 307 {
 308         if (!(--ZATM_DEV(dev)->pool_info[pool].ref_count))
 309                 drain_free(dev,pool);
 310 }
 311
 312 /*----------------------------------- RX ------------------------------------*/
 313
 314
 315 #if 0
 316 static void exception(struct atm_vcc *vcc)
 317 {
 318    static int count = 0;
 319    struct zatm_dev *zatm_dev = ZATM_DEV(vcc->dev);
 320    struct zatm_vcc *zatm_vcc = ZATM_VCC(vcc);
 321    unsigned long *qrp;
 322    int i;
 323
 324    if (count++ > 2) return;
 325    for (i = 0; i < 8; i++)
 326         printk("TX%d: 0x%08lx\n",i,
 327           zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+i));
 328    for (i = 0; i < 5; i++)
 329         printk("SH%d: 0x%08lx\n",i,
 330           zpeekl(zatm_dev,uPD98401_IM(zatm_vcc->shaper)+16*i));
 331    qrp = (unsigned long *) zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
 332      uPD98401_TXVC_QRP);
 333    printk("qrp=0x%08lx\n",(unsigned long) qrp);
 334    for (i = 0; i < 4; i++) printk("QRP[%d]: 0x%08lx",i,qrp[i]);
 335 }
 336 #endif
 337
 338
 339 static const char *err_txt[] = {
 340         "No error",
 341         "RX buf underflow",
 342         "RX FIFO overrun",
 343         "Maximum len violation",
 344         "CRC error",
 345         "User abort",
 346         "Length violation",
 347         "T1 error",
 348         "Deactivated",
 349         "???",
 350         "???",
 351         "???",
 352         "???",
 353         "???",
 354         "???",
 355         "???"
 356 };
 357
 358
 359 static void poll_rx(struct atm_dev *dev,int mbx)
 360 {
 361         struct zatm_dev *zatm_dev;
 362         unsigned long pos;
 363         u32 x;
 364         int error;
 365
 366         EVENT("poll_rx\n",0,0);
 367         zatm_dev = ZATM_DEV(dev);
 368         pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
 369         while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
 370                 u32 *here;
 371                 struct sk_buff *skb;
 372                 struct atm_vcc *vcc;
 373                 int cells,size,chan;
 374
 375                 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
 376                 here = (u32 *) pos;
 377                 if (((pos += 16) & 0xffff) == zatm_dev->mbx_end[mbx])
 378                         pos = zatm_dev->mbx_start[mbx];
 379                 cells = here[0] & uPD98401_AAL5_SIZE;
 380 #if 0
 381 printk("RX IND: 0x%x, 0x%x, 0x%x, 0x%x\n",here[0],here[1],here[2],here[3]);
 382 {
 383 unsigned long *x;
 384                 printk("POOL: 0x%08x, 0x%08x\n",zpeekl(zatm_dev,
 385                       zatm_dev->pool_base),
 386                       zpeekl(zatm_dev,zatm_dev->pool_base+1));
 387                 x = (unsigned long *) here[2];
 388                 printk("[0..3] = 0x%08lx, 0x%08lx, 0x%08lx, 0x%08lx\n",
 389                     x[0],x[1],x[2],x[3]);
 390 }
 391 #endif
 392                 error = 0;
 393                 if (here[3] & uPD98401_AAL5_ERR) {
 394                         error = (here[3] & uPD98401_AAL5_ES) >>
 395                             uPD98401_AAL5_ES_SHIFT;
 396                         if (error == uPD98401_AAL5_ES_DEACT ||
 397                             error == uPD98401_AAL5_ES_FREE) continue;
 398                 }
 399 EVENT("error code 0x%x/0x%x\n",(here[3] & uPD98401_AAL5_ES) >>
 400   uPD98401_AAL5_ES_SHIFT,error);
 401                 skb = ((struct rx_buffer_head *) bus_to_virt(here[2]))->skb;
 402                 __net_timestamp(skb);
 403 #if 0
 404 printk("[-3..0] 0x%08lx 0x%08lx 0x%08lx 0x%08lx\n",((unsigned *) skb->data)[-3],
 405   ((unsigned *) skb->data)[-2],((unsigned *) skb->data)[-1],
 406   ((unsigned *) skb->data)[0]);
 407 #endif
 408                 EVENT("skb 0x%lx, here 0x%lx\n",(unsigned long) skb,
 409                     (unsigned long) here);
 410 #if 0
 411 printk("dummy: 0x%08lx, 0x%08lx\n",dummy[0],dummy[1]);
 412 #endif
 413                 size = error ? 0 : ntohs(((__be16 *) skb->data)[cells*
 414                     ATM_CELL_PAYLOAD/sizeof(u16)-3]);
 415                 EVENT("got skb 0x%lx, size %d\n",(unsigned long) skb,size);
 416                 chan = (here[3] & uPD98401_AAL5_CHAN) >>
 417                     uPD98401_AAL5_CHAN_SHIFT;
 418                 if (chan < zatm_dev->chans && zatm_dev->rx_map[chan]) {
 419                         int pos;
 420                         vcc = zatm_dev->rx_map[chan];
 421                         pos = ZATM_VCC(vcc)->pool;
 422                         if (skb == zatm_dev->last_free[pos])
 423                                 zatm_dev->last_free[pos] = NULL;
 424                         skb_unlink(skb, zatm_dev->pool + pos);
 425                 }
 426                 else {
 427                         printk(KERN_ERR DEV_LABEL "(itf %d): RX indication "
 428                             "for non-existing channel\n",dev->number);
 429                         size = 0;
 430                         vcc = NULL;
 431                         event_dump();
 432                 }
 433                 if (error) {
 434                         static unsigned long silence = 0;
 435                         static int last_error = 0;
 436
 437                         if (error != last_error ||
 438                             time_after(jiffies, silence)  || silence == 0){
 439                                 printk(KERN_WARNING DEV_LABEL "(itf %d): "
 440                                     "chan %d error %s\n",dev->number,chan,
 441                                     err_txt[error]);
 442                                 last_error = error;
 443                                 silence = (jiffies+2*HZ)|1;
 444                         }
 445                         size = 0;
 446                 }
 447                 if (size && (size > cells*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER ||
 448                     size <= (cells-1)*ATM_CELL_PAYLOAD-ATM_AAL5_TRAILER)) {
 449                         printk(KERN_ERR DEV_LABEL "(itf %d): size %d with %d "
 450                             "cells\n",dev->number,size,cells);
 451                         size = 0;
 452                         event_dump();
 453                 }
 454                 if (size > ATM_MAX_AAL5_PDU) {
 455                         printk(KERN_ERR DEV_LABEL "(itf %d): size too big "
 456                             "(%d)\n",dev->number,size);
 457                         size = 0;
 458                         event_dump();
 459                 }
 460                 if (!size) {
 461                         dev_kfree_skb_irq(skb);
 462                         if (vcc) atomic_inc(&vcc->stats->rx_err);
 463                         continue;
 464                 }
 465                 if (!atm_charge(vcc,skb->truesize)) {
 466                         dev_kfree_skb_irq(skb);
 467                         continue;
 468                 }
 469                 skb->len = size;
 470                 ATM_SKB(skb)->vcc = vcc;
 471                 vcc->push(vcc,skb);
 472                 atomic_inc(&vcc->stats->rx);
 473         }
 474         zout(pos & 0xffff,MTA(mbx));
 475 #if 0 /* probably a stupid idea */
 476         refill_pool(dev,zatm_vcc->pool);
 477                 /* maybe this saves us a few interrupts */
 478 #endif
 479 }
 480
 481
 482 static int open_rx_first(struct atm_vcc *vcc)
 483 {
 484         struct zatm_dev *zatm_dev;
 485         struct zatm_vcc *zatm_vcc;
 486         unsigned long flags;
 487         unsigned short chan;
 488         int cells;
 489
 490         DPRINTK("open_rx_first (0x%x)\n",inb_p(0xc053));
 491         zatm_dev = ZATM_DEV(vcc->dev);
 492         zatm_vcc = ZATM_VCC(vcc);
 493         zatm_vcc->rx_chan = 0;
 494         if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 495         if (vcc->qos.aal == ATM_AAL5) {
 496                 if (vcc->qos.rxtp.max_sdu > 65464)
 497                         vcc->qos.rxtp.max_sdu = 65464;
 498                         /* fix this - we may want to receive 64kB SDUs
 499                            later */
 500                 cells = DIV_ROUND_UP(vcc->qos.rxtp.max_sdu + ATM_AAL5_TRAILER,
 501                                 ATM_CELL_PAYLOAD);
 502                 zatm_vcc->pool = pool_index(cells*ATM_CELL_PAYLOAD);
 503         }
 504         else {
 505                 cells = 1;
 506                 zatm_vcc->pool = ZATM_AAL0_POOL;
 507         }
 508         if (zatm_vcc->pool < 0) return -EMSGSIZE;
 509         spin_lock_irqsave(&zatm_dev->lock, flags);
 510         zwait;
 511         zout(uPD98401_OPEN_CHAN,CMR);
 512         zwait;
 513         DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
 514         chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
 515         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 516         DPRINTK("chan is %d\n",chan);
 517         if (!chan) return -EAGAIN;
 518         use_pool(vcc->dev,zatm_vcc->pool);
 519         DPRINTK("pool %d\n",zatm_vcc->pool);
 520         /* set up VC descriptor */
 521         spin_lock_irqsave(&zatm_dev->lock, flags);
 522         zpokel(zatm_dev,zatm_vcc->pool << uPD98401_RXVC_POOL_SHIFT,
 523             chan*VC_SIZE/4);
 524         zpokel(zatm_dev,uPD98401_RXVC_OD | (vcc->qos.aal == ATM_AAL5 ?
 525             uPD98401_RXVC_AR : 0) | cells,chan*VC_SIZE/4+1);
 526         zpokel(zatm_dev,0,chan*VC_SIZE/4+2);
 527         zatm_vcc->rx_chan = chan;
 528         zatm_dev->rx_map[chan] = vcc;
 529         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 530         return 0;
 531 }
 532
 533
 534 static int open_rx_second(struct atm_vcc *vcc)
 535 {
 536         struct zatm_dev *zatm_dev;
 537         struct zatm_vcc *zatm_vcc;
 538         unsigned long flags;
 539         int pos,shift;
 540
 541         DPRINTK("open_rx_second (0x%x)\n",inb_p(0xc053));
 542         zatm_dev = ZATM_DEV(vcc->dev);
 543         zatm_vcc = ZATM_VCC(vcc);
 544         if (!zatm_vcc->rx_chan) return 0;
 545         spin_lock_irqsave(&zatm_dev->lock, flags);
 546         /* should also handle VPI @@@ */
 547         pos = vcc->vci >> 1;
 548         shift = (1-(vcc->vci & 1)) << 4;
 549         zpokel(zatm_dev,(zpeekl(zatm_dev,pos) & ~(0xffff << shift)) |
 550             ((zatm_vcc->rx_chan | uPD98401_RXLT_ENBL) << shift),pos);
 551         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 552         return 0;
 553 }
 554
 555
 556 static void close_rx(struct atm_vcc *vcc)
 557 {
 558         struct zatm_dev *zatm_dev;
 559         struct zatm_vcc *zatm_vcc;
 560         unsigned long flags;
 561         int pos,shift;
 562
 563         zatm_vcc = ZATM_VCC(vcc);
 564         zatm_dev = ZATM_DEV(vcc->dev);
 565         if (!zatm_vcc->rx_chan) return;
 566         DPRINTK("close_rx\n");
 567         /* disable receiver */
 568         if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 569                 spin_lock_irqsave(&zatm_dev->lock, flags);
 570                 pos = vcc->vci >> 1;
 571                 shift = (1-(vcc->vci & 1)) << 4;
 572                 zpokel(zatm_dev,zpeekl(zatm_dev,pos) & ~(0xffff << shift),pos);
 573                 zwait;
 574                 zout(uPD98401_NOP,CMR);
 575                 zwait;
 576                 zout(uPD98401_NOP,CMR);
 577                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
 578         }
 579         spin_lock_irqsave(&zatm_dev->lock, flags);
 580         zwait;
 581         zout(uPD98401_DEACT_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
 582             uPD98401_CHAN_ADDR_SHIFT),CMR);
 583         zwait;
 584         udelay(10); /* why oh why ... ? */
 585         zout(uPD98401_CLOSE_CHAN | uPD98401_CHAN_RT | (zatm_vcc->rx_chan <<
 586             uPD98401_CHAN_ADDR_SHIFT),CMR);
 587         zwait;
 588         if (!(zin(CMR) & uPD98401_CHAN_ADDR))
 589                 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close RX channel "
 590                     "%d\n",vcc->dev->number,zatm_vcc->rx_chan);
 591         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 592         zatm_dev->rx_map[zatm_vcc->rx_chan] = NULL;
 593         zatm_vcc->rx_chan = 0;
 594         unuse_pool(vcc->dev,zatm_vcc->pool);
 595 }
 596
 597
 598 static int start_rx(struct atm_dev *dev)
 599 {
 600         struct zatm_dev *zatm_dev;
 601         int size,i;
 602
 603 DPRINTK("start_rx\n");
 604         zatm_dev = ZATM_DEV(dev);
 605         size = sizeof(struct atm_vcc *)*zatm_dev->chans;
 606         zatm_dev->rx_map =  kzalloc(size,GFP_KERNEL);
 607         if (!zatm_dev->rx_map) return -ENOMEM;
 608         /* set VPI/VCI split (use all VCIs and give what's left to VPIs) */
 609         zpokel(zatm_dev,(1 << dev->ci_range.vci_bits)-1,uPD98401_VRR);
 610         /* prepare free buffer pools */
 611         for (i = 0; i <= ZATM_LAST_POOL; i++) {
 612                 zatm_dev->pool_info[i].ref_count = 0;
 613                 zatm_dev->pool_info[i].rqa_count = 0;
 614                 zatm_dev->pool_info[i].rqu_count = 0;
 615                 zatm_dev->pool_info[i].low_water = LOW_MARK;
 616                 zatm_dev->pool_info[i].high_water = HIGH_MARK;
 617                 zatm_dev->pool_info[i].offset = 0;
 618                 zatm_dev->pool_info[i].next_off = 0;
 619                 zatm_dev->pool_info[i].next_cnt = 0;
 620                 zatm_dev->pool_info[i].next_thres = OFF_CNG_THRES;
 621         }
 622         return 0;
 623 }
 624
 625
 626 /*----------------------------------- TX ------------------------------------*/
 627
 628
 629 static int do_tx(struct sk_buff *skb)
 630 {
 631         struct atm_vcc *vcc;
 632         struct zatm_dev *zatm_dev;
 633         struct zatm_vcc *zatm_vcc;
 634         u32 *dsc;
 635         unsigned long flags;
 636
 637         EVENT("do_tx\n",0,0);
 638         DPRINTK("sending skb %p\n",skb);
 639         vcc = ATM_SKB(skb)->vcc;
 640         zatm_dev = ZATM_DEV(vcc->dev);
 641         zatm_vcc = ZATM_VCC(vcc);
 642         EVENT("iovcnt=%d\n",skb_shinfo(skb)->nr_frags,0);
 643         spin_lock_irqsave(&zatm_dev->lock, flags);
 644         if (!skb_shinfo(skb)->nr_frags) {
 645                 if (zatm_vcc->txing == RING_ENTRIES-1) {
 646                         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 647                         return RING_BUSY;
 648                 }
 649                 zatm_vcc->txing++;
 650                 dsc = zatm_vcc->ring+zatm_vcc->ring_curr;
 651                 zatm_vcc->ring_curr = (zatm_vcc->ring_curr+RING_WORDS) &
 652                     (RING_ENTRIES*RING_WORDS-1);
 653                 dsc[1] = 0;
 654                 dsc[2] = skb->len;
 655                 dsc[3] = virt_to_bus(skb->data);
 656                 mb();
 657                 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP | uPD98401_TXPD_SM
 658                     | (vcc->qos.aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
 659                     (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
 660                     uPD98401_CLPM_1 : uPD98401_CLPM_0));
 661                 EVENT("dsc (0x%lx)\n",(unsigned long) dsc,0);
 662         }
 663         else {
 664 printk("NONONONOO!!!!\n");
 665                 dsc = NULL;
 666 #if 0
 667                 u32 *put;
 668                 int i;
 669
 670                 dsc = kmalloc(uPD98401_TXPD_SIZE * 2 +
 671                         uPD98401_TXBD_SIZE * ATM_SKB(skb)->iovcnt, GFP_ATOMIC);
 672                 if (!dsc) {
 673                         if (vcc->pop)
 674                                 vcc->pop(vcc, skb);
 675                         else
 676                                 dev_kfree_skb_irq(skb);
 677                         return -EAGAIN;
 678                 }
 679                 /* @@@ should check alignment */
 680                 put = dsc+8;
 681                 dsc[0] = uPD98401_TXPD_V | uPD98401_TXPD_DP |
 682                     (vcc->aal == ATM_AAL5 ? uPD98401_TXPD_AAL5 : 0 |
 683                     (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ?
 684                     uPD98401_CLPM_1 : uPD98401_CLPM_0));
 685                 dsc[1] = 0;
 686                 dsc[2] = ATM_SKB(skb)->iovcnt * uPD98401_TXBD_SIZE;
 687                 dsc[3] = virt_to_bus(put);
 688                 for (i = 0; i < ATM_SKB(skb)->iovcnt; i++) {
 689                         *put++ = ((struct iovec *) skb->data)[i].iov_len;
 690                         *put++ = virt_to_bus(((struct iovec *)
 691                             skb->data)[i].iov_base);
 692                 }
 693                 put[-2] |= uPD98401_TXBD_LAST;
 694 #endif
 695         }
 696         ZATM_PRV_DSC(skb) = dsc;
 697         skb_queue_tail(&zatm_vcc->tx_queue,skb);
 698         DPRINTK("QRP=0x%08lx\n",zpeekl(zatm_dev,zatm_vcc->tx_chan*VC_SIZE/4+
 699           uPD98401_TXVC_QRP));
 700         zwait;
 701         zout(uPD98401_TX_READY | (zatm_vcc->tx_chan <<
 702             uPD98401_CHAN_ADDR_SHIFT),CMR);
 703         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 704         EVENT("done\n",0,0);
 705         return 0;
 706 }
 707
 708
 709 static inline void dequeue_tx(struct atm_vcc *vcc)
 710 {
 711         struct zatm_vcc *zatm_vcc;
 712         struct sk_buff *skb;
 713
 714         EVENT("dequeue_tx\n",0,0);
 715         zatm_vcc = ZATM_VCC(vcc);
 716         skb = skb_dequeue(&zatm_vcc->tx_queue);
 717         if (!skb) {
 718                 printk(KERN_CRIT DEV_LABEL "(itf %d): dequeue_tx but not "
 719                     "txing\n",vcc->dev->number);
 720                 return;
 721         }
 722 #if 0 /* @@@ would fail on CLP */
 723 if (*ZATM_PRV_DSC(skb) != (uPD98401_TXPD_V | uPD98401_TXPD_DP |
 724   uPD98401_TXPD_SM | uPD98401_TXPD_AAL5)) printk("@#*$!!!!  (%08x)\n",
 725   *ZATM_PRV_DSC(skb));
 726 #endif
 727         *ZATM_PRV_DSC(skb) = 0; /* mark as invalid */
 728         zatm_vcc->txing--;
 729         if (vcc->pop) vcc->pop(vcc,skb);
 730         else dev_kfree_skb_irq(skb);
 731         while ((skb = skb_dequeue(&zatm_vcc->backlog)))
 732                 if (do_tx(skb) == RING_BUSY) {
 733                         skb_queue_head(&zatm_vcc->backlog,skb);
 734                         break;
 735                 }
 736         atomic_inc(&vcc->stats->tx);
 737         wake_up(&zatm_vcc->tx_wait);
 738 }
 739
 740
 741 static void poll_tx(struct atm_dev *dev,int mbx)
 742 {
 743         struct zatm_dev *zatm_dev;
 744         unsigned long pos;
 745         u32 x;
 746
 747         EVENT("poll_tx\n",0,0);
 748         zatm_dev = ZATM_DEV(dev);
 749         pos = (zatm_dev->mbx_start[mbx] & ~0xffffUL) | zin(MTA(mbx));
 750         while (x = zin(MWA(mbx)), (pos & 0xffff) != x) {
 751                 int chan;
 752
 753 #if 1
 754                 u32 data,*addr;
 755
 756                 EVENT("MBX: host 0x%lx, nic 0x%x\n",pos,x);
 757                 addr = (u32 *) pos;
 758                 data = *addr;
 759                 chan = (data & uPD98401_TXI_CONN) >> uPD98401_TXI_CONN_SHIFT;
 760                 EVENT("addr = 0x%lx, data = 0x%08x,",(unsigned long) addr,
 761                     data);
 762                 EVENT("chan = %d\n",chan,0);
 763 #else
 764 NO !
 765                 chan = (zatm_dev->mbx_start[mbx][pos >> 2] & uPD98401_TXI_CONN)
 766                 >> uPD98401_TXI_CONN_SHIFT;
 767 #endif
 768                 if (chan < zatm_dev->chans && zatm_dev->tx_map[chan])
 769                         dequeue_tx(zatm_dev->tx_map[chan]);
 770                 else {
 771                         printk(KERN_CRIT DEV_LABEL "(itf %d): TX indication "
 772                             "for non-existing channel %d\n",dev->number,chan);
 773                         event_dump();
 774                 }
 775                 if (((pos += 4) & 0xffff) == zatm_dev->mbx_end[mbx])
 776                         pos = zatm_dev->mbx_start[mbx];
 777         }
 778         zout(pos & 0xffff,MTA(mbx));
 779 }
 780
 781
 782 /*
 783  * BUG BUG BUG: Doesn't handle "new-style" rate specification yet.
 784  */
 785
 786 static int alloc_shaper(struct atm_dev *dev,int *pcr,int min,int max,int ubr)
 787 {
 788         struct zatm_dev *zatm_dev;
 789         unsigned long flags;
 790         unsigned long i,m,c;
 791         int shaper;
 792
 793         DPRINTK("alloc_shaper (min = %d, max = %d)\n",min,max);
 794         zatm_dev = ZATM_DEV(dev);
 795         if (!zatm_dev->free_shapers) return -EAGAIN;
 796         for (shaper = 0; !((zatm_dev->free_shapers >> shaper) & 1); shaper++);
 797         zatm_dev->free_shapers &= ~1 << shaper;
 798         if (ubr) {
 799                 c = 5;
 800                 i = m = 1;
 801                 zatm_dev->ubr_ref_cnt++;
 802                 zatm_dev->ubr = shaper;
 803                 *pcr = 0;
 804         }
 805         else {
 806                 if (min) {
 807                         if (min <= 255) {
 808                                 i = min;
 809                                 m = ATM_OC3_PCR;
 810                         }
 811                         else {
 812                                 i = 255;
 813                                 m = ATM_OC3_PCR*255/min;
 814                         }
 815                 }
 816                 else {
 817                         if (max > zatm_dev->tx_bw) max = zatm_dev->tx_bw;
 818                         if (max <= 255) {
 819                                 i = max;
 820                                 m = ATM_OC3_PCR;
 821                         }
 822                         else {
 823                                 i = 255;
 824                                 m = DIV_ROUND_UP(ATM_OC3_PCR*255, max);
 825                         }
 826                 }
 827                 if (i > m) {
 828                         printk(KERN_CRIT DEV_LABEL "shaper algorithm botched "
 829                             "[%d,%d] -> i=%ld,m=%ld\n",min,max,i,m);
 830                         m = i;
 831                 }
 832                 *pcr = i*ATM_OC3_PCR/m;
 833                 c = 20; /* @@@ should use max_cdv ! */
 834                 if ((min && *pcr < min) || (max && *pcr > max)) return -EINVAL;
 835                 if (zatm_dev->tx_bw < *pcr) return -EAGAIN;
 836                 zatm_dev->tx_bw -= *pcr;
 837         }
 838         spin_lock_irqsave(&zatm_dev->lock, flags);
 839         DPRINTK("i = %d, m = %d, PCR = %d\n",i,m,*pcr);
 840         zpokel(zatm_dev,(i << uPD98401_IM_I_SHIFT) | m,uPD98401_IM(shaper));
 841         zpokel(zatm_dev,c << uPD98401_PC_C_SHIFT,uPD98401_PC(shaper));
 842         zpokel(zatm_dev,0,uPD98401_X(shaper));
 843         zpokel(zatm_dev,0,uPD98401_Y(shaper));
 844         zpokel(zatm_dev,uPD98401_PS_E,uPD98401_PS(shaper));
 845         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 846         return shaper;
 847 }
 848
 849
 850 static void dealloc_shaper(struct atm_dev *dev,int shaper)
 851 {
 852         struct zatm_dev *zatm_dev;
 853         unsigned long flags;
 854
 855         zatm_dev = ZATM_DEV(dev);
 856         if (shaper == zatm_dev->ubr) {
 857                 if (--zatm_dev->ubr_ref_cnt) return;
 858                 zatm_dev->ubr = -1;
 859         }
 860         spin_lock_irqsave(&zatm_dev->lock, flags);
 861         zpokel(zatm_dev,zpeekl(zatm_dev,uPD98401_PS(shaper)) & ~uPD98401_PS_E,
 862             uPD98401_PS(shaper));
 863         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 864         zatm_dev->free_shapers |= 1 << shaper;
 865 }
 866
 867
 868 static void close_tx(struct atm_vcc *vcc)
 869 {
 870         struct zatm_dev *zatm_dev;
 871         struct zatm_vcc *zatm_vcc;
 872         unsigned long flags;
 873         int chan;
 874
 875         zatm_vcc = ZATM_VCC(vcc);
 876         zatm_dev = ZATM_DEV(vcc->dev);
 877         chan = zatm_vcc->tx_chan;
 878         if (!chan) return;
 879         DPRINTK("close_tx\n");
 880         if (skb_peek(&zatm_vcc->backlog)) {
 881                 printk("waiting for backlog to drain ...\n");
 882                 event_dump();
 883                 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->backlog));
 884         }
 885         if (skb_peek(&zatm_vcc->tx_queue)) {
 886                 printk("waiting for TX queue to drain ...\n");
 887                 event_dump();
 888                 wait_event(zatm_vcc->tx_wait, !skb_peek(&zatm_vcc->tx_queue));
 889         }
 890         spin_lock_irqsave(&zatm_dev->lock, flags);
 891 #if 0
 892         zwait;
 893         zout(uPD98401_DEACT_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
 894 #endif
 895         zwait;
 896         zout(uPD98401_CLOSE_CHAN | (chan << uPD98401_CHAN_ADDR_SHIFT),CMR);
 897         zwait;
 898         if (!(zin(CMR) & uPD98401_CHAN_ADDR))
 899                 printk(KERN_CRIT DEV_LABEL "(itf %d): can't close TX channel "
 900                     "%d\n",vcc->dev->number,chan);
 901         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 902         zatm_vcc->tx_chan = 0;
 903         zatm_dev->tx_map[chan] = NULL;
 904         if (zatm_vcc->shaper != zatm_dev->ubr) {
 905                 zatm_dev->tx_bw += vcc->qos.txtp.min_pcr;
 906                 dealloc_shaper(vcc->dev,zatm_vcc->shaper);
 907         }
 908         kfree(zatm_vcc->ring);
 909 }
 910
 911
 912 static int open_tx_first(struct atm_vcc *vcc)
 913 {
 914         struct zatm_dev *zatm_dev;
 915         struct zatm_vcc *zatm_vcc;
 916         unsigned long flags;
 917         u32 *loop;
 918         unsigned short chan;
 919         int unlimited;
 920
 921         DPRINTK("open_tx_first\n");
 922         zatm_dev = ZATM_DEV(vcc->dev);
 923         zatm_vcc = ZATM_VCC(vcc);
 924         zatm_vcc->tx_chan = 0;
 925         if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
 926         spin_lock_irqsave(&zatm_dev->lock, flags);
 927         zwait;
 928         zout(uPD98401_OPEN_CHAN,CMR);
 929         zwait;
 930         DPRINTK("0x%x 0x%x\n",zin(CMR),zin(CER));
 931         chan = (zin(CMR) & uPD98401_CHAN_ADDR) >> uPD98401_CHAN_ADDR_SHIFT;
 932         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 933         DPRINTK("chan is %d\n",chan);
 934         if (!chan) return -EAGAIN;
 935         unlimited = vcc->qos.txtp.traffic_class == ATM_UBR &&
 936             (!vcc->qos.txtp.max_pcr || vcc->qos.txtp.max_pcr == ATM_MAX_PCR ||
 937             vcc->qos.txtp.max_pcr >= ATM_OC3_PCR);
 938         if (unlimited && zatm_dev->ubr != -1) zatm_vcc->shaper = zatm_dev->ubr;
 939         else {
 940                 int uninitialized_var(pcr);
 941
 942                 if (unlimited) vcc->qos.txtp.max_sdu = ATM_MAX_AAL5_PDU;
 943                 if ((zatm_vcc->shaper = alloc_shaper(vcc->dev,&pcr,
 944                     vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,unlimited))
 945                     < 0) {
 946                         close_tx(vcc);
 947                         return zatm_vcc->shaper;
 948                 }
 949                 if (pcr > ATM_OC3_PCR) pcr = ATM_OC3_PCR;
 950                 vcc->qos.txtp.min_pcr = vcc->qos.txtp.max_pcr = pcr;
 951         }
 952         zatm_vcc->tx_chan = chan;
 953         skb_queue_head_init(&zatm_vcc->tx_queue);
 954         init_waitqueue_head(&zatm_vcc->tx_wait);
 955         /* initialize ring */
 956         zatm_vcc->ring = kzalloc(RING_SIZE,GFP_KERNEL);
 957         if (!zatm_vcc->ring) return -ENOMEM;
 958         loop = zatm_vcc->ring+RING_ENTRIES*RING_WORDS;
 959         loop[0] = uPD98401_TXPD_V;
 960         loop[1] = loop[2] = 0;
 961         loop[3] = virt_to_bus(zatm_vcc->ring);
 962         zatm_vcc->ring_curr = 0;
 963         zatm_vcc->txing = 0;
 964         skb_queue_head_init(&zatm_vcc->backlog);
 965         zpokel(zatm_dev,virt_to_bus(zatm_vcc->ring),
 966             chan*VC_SIZE/4+uPD98401_TXVC_QRP);
 967         return 0;
 968 }
 969
 970
 971 static int open_tx_second(struct atm_vcc *vcc)
 972 {
 973         struct zatm_dev *zatm_dev;
 974         struct zatm_vcc *zatm_vcc;
 975         unsigned long flags;
 976
 977         DPRINTK("open_tx_second\n");
 978         zatm_dev = ZATM_DEV(vcc->dev);
 979         zatm_vcc = ZATM_VCC(vcc);
 980         if (!zatm_vcc->tx_chan) return 0;
 981         /* set up VC descriptor */
 982         spin_lock_irqsave(&zatm_dev->lock, flags);
 983         zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4);
 984         zpokel(zatm_dev,uPD98401_TXVC_L | (zatm_vcc->shaper <<
 985             uPD98401_TXVC_SHP_SHIFT) | (vcc->vpi << uPD98401_TXVC_VPI_SHIFT) |
 986             vcc->vci,zatm_vcc->tx_chan*VC_SIZE/4+1);
 987         zpokel(zatm_dev,0,zatm_vcc->tx_chan*VC_SIZE/4+2);
 988         spin_unlock_irqrestore(&zatm_dev->lock, flags);
 989         zatm_dev->tx_map[zatm_vcc->tx_chan] = vcc;
 990         return 0;
 991 }
 992
 993
 994 static int start_tx(struct atm_dev *dev)
 995 {
 996         struct zatm_dev *zatm_dev;
 997         int i;
 998
 999         DPRINTK("start_tx\n");
1000         zatm_dev = ZATM_DEV(dev);
1001         zatm_dev->tx_map = kmalloc_array(zatm_dev->chans,
1002                                          sizeof(*zatm_dev->tx_map),
1003                                          GFP_KERNEL);
1004         if (!zatm_dev->tx_map) return -ENOMEM;
1005         zatm_dev->tx_bw = ATM_OC3_PCR;
1006         zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
1007         zatm_dev->ubr = -1;
1008         zatm_dev->ubr_ref_cnt = 0;
1009         /* initialize shapers */
1010         for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
1011         return 0;
1012 }
1013
1014
1015 /*------------------------------- interrupts --------------------------------*/
1016
1017
1018 static irqreturn_t zatm_int(int irq,void *dev_id)
1019 {
1020         struct atm_dev *dev;
1021         struct zatm_dev *zatm_dev;
1022         u32 reason;
1023         int handled = 0;
1024
1025         dev = dev_id;
1026         zatm_dev = ZATM_DEV(dev);
1027         while ((reason = zin(GSR))) {
1028                 handled = 1;
1029                 EVENT("reason 0x%x\n",reason,0);
1030                 if (reason & uPD98401_INT_PI) {
1031                         EVENT("PHY int\n",0,0);
1032                         dev->phy->interrupt(dev);
1033                 }
1034                 if (reason & uPD98401_INT_RQA) {
1035                         unsigned long pools;
1036                         int i;
1037
1038                         pools = zin(RQA);
1039                         EVENT("RQA (0x%08x)\n",pools,0);
1040                         for (i = 0; pools; i++) {
1041                                 if (pools & 1) {
1042                                         refill_pool(dev,i);
1043                                         zatm_dev->pool_info[i].rqa_count++;
1044                                 }
1045                                 pools >>= 1;
1046                         }
1047                 }
1048                 if (reason & uPD98401_INT_RQU) {
1049                         unsigned long pools;
1050                         int i;
1051                         pools = zin(RQU);
1052                         printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
1053                             dev->number,pools);
1054                         event_dump();
1055                         for (i = 0; pools; i++) {
1056                                 if (pools & 1) {
1057                                         refill_pool(dev,i);
1058                                         zatm_dev->pool_info[i].rqu_count++;
1059                                 }
1060                                 pools >>= 1;
1061                         }
1062                 }
1063                 /* don't handle RD */
1064                 if (reason & uPD98401_INT_SPE)
1065                         printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
1066                             "error at 0x%08x\n",dev->number,zin(ADDR));
1067                 if (reason & uPD98401_INT_CPE)
1068                         printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
1069                             "parity error at 0x%08x\n",dev->number,zin(ADDR));
1070                 if (reason & uPD98401_INT_SBE) {
1071                         printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
1072                             "error at 0x%08x\n",dev->number,zin(ADDR));
1073                         event_dump();
1074                 }
1075                 /* don't handle IND */
1076                 if (reason & uPD98401_INT_MF) {
1077                         printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
1078                             "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
1079                             >> uPD98401_INT_MF_SHIFT);
1080                         event_dump();
1081                             /* @@@ should try to recover */
1082                 }
1083                 if (reason & uPD98401_INT_MM) {
1084                         if (reason & 1) poll_rx(dev,0);
1085                         if (reason & 2) poll_rx(dev,1);
1086                         if (reason & 4) poll_tx(dev,2);
1087                         if (reason & 8) poll_tx(dev,3);
1088                 }
1089                 /* @@@ handle RCRn */
1090         }
1091         return IRQ_RETVAL(handled);
1092 }
1093
1094
1095 /*----------------------------- (E)EPROM access -----------------------------*/
1096
1097
1098 static void eprom_set(struct zatm_dev *zatm_dev, unsigned long value,
1099                       unsigned short cmd)
1100 {
1101         int error;
1102
1103         if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
1104                 printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
1105                     error);
1106 }
1107
1108
1109 static unsigned long eprom_get(struct zatm_dev *zatm_dev, unsigned short cmd)
1110 {
1111         unsigned int value;
1112         int error;
1113
1114         if ((error = pci_read_config_dword(zatm_dev->pci_dev,cmd,&value)))
1115                 printk(KERN_ERR DEV_LABEL ": PCI read failed (0x%02x)\n",
1116                     error);
1117         return value;
1118 }
1119
1120
1121 static void eprom_put_bits(struct zatm_dev *zatm_dev, unsigned long data,
1122                            int bits, unsigned short cmd)
1123 {
1124         unsigned long value;
1125         int i;
1126
1127         for (i = bits-1; i >= 0; i--) {
1128                 value = ZEPROM_CS | (((data >> i) & 1) ? ZEPROM_DI : 0);
1129                 eprom_set(zatm_dev,value,cmd);
1130                 eprom_set(zatm_dev,value | ZEPROM_SK,cmd);
1131                 eprom_set(zatm_dev,value,cmd);
1132         }
1133 }
1134
1135
1136 static void eprom_get_byte(struct zatm_dev *zatm_dev, unsigned char *byte,
1137                            unsigned short cmd)
1138 {
1139         int i;
1140
1141         *byte = 0;
1142         for (i = 8; i; i--) {
1143                 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1144                 eprom_set(zatm_dev,ZEPROM_CS | ZEPROM_SK,cmd);
1145                 *byte <<= 1;
1146                 if (eprom_get(zatm_dev,cmd) & ZEPROM_DO) *byte |= 1;
1147                 eprom_set(zatm_dev,ZEPROM_CS,cmd);
1148         }
1149 }
1150
1151
1152 static unsigned char eprom_try_esi(struct atm_dev *dev, unsigned short cmd,
1153                                    int offset, int swap)
1154 {
1155         unsigned char buf[ZEPROM_SIZE];
1156         struct zatm_dev *zatm_dev;
1157         int i;
1158
1159         zatm_dev = ZATM_DEV(dev);
1160         for (i = 0; i < ZEPROM_SIZE; i += 2) {
1161                 eprom_set(zatm_dev,ZEPROM_CS,cmd); /* select EPROM */
1162                 eprom_put_bits(zatm_dev,ZEPROM_CMD_READ,ZEPROM_CMD_LEN,cmd);
1163                 eprom_put_bits(zatm_dev,i >> 1,ZEPROM_ADDR_LEN,cmd);
1164                 eprom_get_byte(zatm_dev,buf+i+swap,cmd);
1165                 eprom_get_byte(zatm_dev,buf+i+1-swap,cmd);
1166                 eprom_set(zatm_dev,0,cmd); /* deselect EPROM */
1167         }
1168         memcpy(dev->esi,buf+offset,ESI_LEN);
1169         return memcmp(dev->esi,"\0\0\0\0\0",ESI_LEN); /* assumes ESI_LEN == 6 */
1170 }
1171
1172
1173 static void eprom_get_esi(struct atm_dev *dev)
1174 {
1175         if (eprom_try_esi(dev,ZEPROM_V1_REG,ZEPROM_V1_ESI_OFF,1)) return;
1176         (void) eprom_try_esi(dev,ZEPROM_V2_REG,ZEPROM_V2_ESI_OFF,0);
1177 }
1178
1179
1180 /*--------------------------------- entries ---------------------------------*/
1181
1182
1183 static int zatm_init(struct atm_dev *dev)
1184 {
1185         struct zatm_dev *zatm_dev;
1186         struct pci_dev *pci_dev;
1187         unsigned short command;
1188         int error,i,last;
1189         unsigned long t0,t1,t2;
1190
1191         DPRINTK(">zatm_init\n");
1192         zatm_dev = ZATM_DEV(dev);
1193         spin_lock_init(&zatm_dev->lock);
1194         pci_dev = zatm_dev->pci_dev;
1195         zatm_dev->base = pci_resource_start(pci_dev, 0);
1196         zatm_dev->irq = pci_dev->irq;
1197         if ((error = pci_read_config_word(pci_dev,PCI_COMMAND,&command))) {
1198                 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n",
1199                     dev->number,error);
1200                 return -EINVAL;
1201         }
1202         if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1203             command | PCI_COMMAND_IO | PCI_COMMAND_MASTER))) {
1204                 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable IO (0x%02x)"
1205                     "\n",dev->number,error);
1206                 return -EIO;
1207         }
1208         eprom_get_esi(dev);
1209         printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%x,irq=%d,",
1210             dev->number,pci_dev->revision,zatm_dev->base,zatm_dev->irq);
1211         /* reset uPD98401 */
1212         zout(0,SWR);
1213         while (!(zin(GSR) & uPD98401_INT_IND));
1214         zout(uPD98401_GMR_ONE /*uPD98401_BURST4*/,GMR);
1215         last = MAX_CRAM_SIZE;
1216         for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1217                 zpokel(zatm_dev,0x55555555,i);
1218                 if (zpeekl(zatm_dev,i) != 0x55555555) last = i;
1219                 else {
1220                         zpokel(zatm_dev,0xAAAAAAAA,i);
1221                         if (zpeekl(zatm_dev,i) != 0xAAAAAAAA) last = i;
1222                         else zpokel(zatm_dev,i,i);
1223                 }
1224         }
1225         for (i = 0; i < last; i += RAM_INCREMENT)
1226                 if (zpeekl(zatm_dev,i) != i) break;
1227         zatm_dev->mem = i << 2;
1228         while (i) zpokel(zatm_dev,0,--i);
1229         /* reset again to rebuild memory pointers */
1230         zout(0,SWR);
1231         while (!(zin(GSR) & uPD98401_INT_IND));
1232         zout(uPD98401_GMR_ONE | uPD98401_BURST8 | uPD98401_BURST4 |
1233             uPD98401_BURST2 | uPD98401_GMR_PM | uPD98401_GMR_DR,GMR);
1234         /* TODO: should shrink allocation now */
1235         printk("mem=%dkB,%s (",zatm_dev->mem >> 10,zatm_dev->copper ? "UTP" :
1236             "MMF");
1237         for (i = 0; i < ESI_LEN; i++)
1238                 printk("%02X%s",dev->esi[i],i == ESI_LEN-1 ? ")\n" : "-");
1239         do {
1240                 unsigned long flags;
1241
1242                 spin_lock_irqsave(&zatm_dev->lock, flags);
1243                 t0 = zpeekl(zatm_dev,uPD98401_TSR);
1244                 udelay(10);
1245                 t1 = zpeekl(zatm_dev,uPD98401_TSR);
1246                 udelay(1010);
1247                 t2 = zpeekl(zatm_dev,uPD98401_TSR);
1248                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1249         }
1250         while (t0 > t1 || t1 > t2); /* loop if wrapping ... */
1251         zatm_dev->khz = t2-2*t1+t0;
1252         printk(KERN_NOTICE DEV_LABEL "(itf %d): uPD98401 %d.%d at %d.%03d "
1253             "MHz\n",dev->number,
1254             (zin(VER) & uPD98401_MAJOR) >> uPD98401_MAJOR_SHIFT,
1255             zin(VER) & uPD98401_MINOR,zatm_dev->khz/1000,zatm_dev->khz % 1000);
1256         return uPD98402_init(dev);
1257 }
1258
1259
1260 static int zatm_start(struct atm_dev *dev)
1261 {
1262         struct zatm_dev *zatm_dev = ZATM_DEV(dev);
1263         struct pci_dev *pdev = zatm_dev->pci_dev;
1264         unsigned long curr;
1265         int pools,vccs,rx;
1266         int error, i, ld;
1267
1268         DPRINTK("zatm_start\n");
1269         zatm_dev->rx_map = zatm_dev->tx_map = NULL;
1270         for (i = 0; i < NR_MBX; i++)
1271                 zatm_dev->mbx_start[i] = 0;
1272         error = request_irq(zatm_dev->irq, zatm_int, IRQF_SHARED, DEV_LABEL, dev);
1273         if (error < 0) {
1274                 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1275                     dev->number,zatm_dev->irq);
1276                 goto done;
1277         }
1278         /* define memory regions */
1279         pools = NR_POOLS;
1280         if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
1281                 pools = NR_SHAPERS*SHAPER_SIZE/POOL_SIZE;
1282         vccs = (zatm_dev->mem-NR_SHAPERS*SHAPER_SIZE-pools*POOL_SIZE)/
1283             (2*VC_SIZE+RX_SIZE);
1284         ld = -1;
1285         for (rx = 1; rx < vccs; rx <<= 1) ld++;
1286         dev->ci_range.vpi_bits = 0; /* @@@ no VPI for now */
1287         dev->ci_range.vci_bits = ld;
1288         dev->link_rate = ATM_OC3_PCR;
1289         zatm_dev->chans = vccs; /* ??? */
1290         curr = rx*RX_SIZE/4;
1291         DPRINTK("RX pool 0x%08lx\n",curr);
1292         zpokel(zatm_dev,curr,uPD98401_PMA); /* receive pool */
1293         zatm_dev->pool_base = curr;
1294         curr += pools*POOL_SIZE/4;
1295         DPRINTK("Shapers 0x%08lx\n",curr);
1296         zpokel(zatm_dev,curr,uPD98401_SMA); /* shapers */
1297         curr += NR_SHAPERS*SHAPER_SIZE/4;
1298         DPRINTK("Free    0x%08lx\n",curr);
1299         zpokel(zatm_dev,curr,uPD98401_TOS); /* free pool */
1300         printk(KERN_INFO DEV_LABEL "(itf %d): %d shapers, %d pools, %d RX, "
1301             "%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
1302             (zatm_dev->mem-curr*4)/VC_SIZE);
1303         /* create mailboxes */
1304         for (i = 0; i < NR_MBX; i++) {
1305                 void *mbx;
1306                 dma_addr_t mbx_dma;
1307
1308                 if (!mbx_entries[i])
1309                         continue;
1310                 mbx = dma_alloc_coherent(&pdev->dev,
1311                                          2 * MBX_SIZE(i), &mbx_dma, GFP_KERNEL);
1312                 if (!mbx) {
1313                         error = -ENOMEM;
1314                         goto out;
1315                 }
1316                 /*
1317                  * Alignment provided by dma_alloc_coherent() isn't enough
1318                  * for this device.
1319                  */
1320                 if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
1321                         printk(KERN_ERR DEV_LABEL "(itf %d): system "
1322                                "bus incompatible with driver\n", dev->number);
1323                         dma_free_coherent(&pdev->dev, 2*MBX_SIZE(i), mbx, mbx_dma);
1324                         error = -ENODEV;
1325                         goto out;
1326                 }
1327                 DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
1328                 zatm_dev->mbx_start[i] = (unsigned long)mbx;
1329                 zatm_dev->mbx_dma[i] = mbx_dma;
1330                 zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
1331                                         0xffff;
1332                 zout(mbx_dma >> 16, MSH(i));
1333                 zout(mbx_dma, MSL(i));
1334                 zout(zatm_dev->mbx_end[i], MBA(i));
1335                 zout((unsigned long)mbx & 0xffff, MTA(i));
1336                 zout((unsigned long)mbx & 0xffff, MWA(i));
1337         }
1338         error = start_tx(dev);
1339         if (error)
1340                 goto out;
1341         error = start_rx(dev);
1342         if (error)
1343                 goto out_tx;
1344         error = dev->phy->start(dev);
1345         if (error)
1346                 goto out_rx;
1347         zout(0xffffffff,IMR); /* enable interrupts */
1348         /* enable TX & RX */
1349         zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
1350 done:
1351         return error;
1352
1353 out_rx:
1354         kfree(zatm_dev->rx_map);
1355 out_tx:
1356         kfree(zatm_dev->tx_map);
1357 out:
1358         while (i-- > 0) {
1359                 dma_free_coherent(&pdev->dev, 2 * MBX_SIZE(i),
1360                                   (void *)zatm_dev->mbx_start[i],
1361                                   zatm_dev->mbx_dma[i]);
1362         }
1363         free_irq(zatm_dev->irq, dev);
1364         goto done;
1365 }
1366
1367
1368 static void zatm_close(struct atm_vcc *vcc)
1369 {
1370         DPRINTK(">zatm_close\n");
1371         if (!ZATM_VCC(vcc)) return;
1372         clear_bit(ATM_VF_READY,&vcc->flags);
1373         close_rx(vcc);
1374         EVENT("close_tx\n",0,0);
1375         close_tx(vcc);
1376         DPRINTK("zatm_close: done waiting\n");
1377         /* deallocate memory */
1378         kfree(ZATM_VCC(vcc));
1379         vcc->dev_data = NULL;
1380         clear_bit(ATM_VF_ADDR,&vcc->flags);
1381 }
1382
1383
1384 static int zatm_open(struct atm_vcc *vcc)
1385 {
1386         struct zatm_dev *zatm_dev;
1387         struct zatm_vcc *zatm_vcc;
1388         short vpi = vcc->vpi;
1389         int vci = vcc->vci;
1390         int error;
1391
1392         DPRINTK(">zatm_open\n");
1393         zatm_dev = ZATM_DEV(vcc->dev);
1394         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1395                 vcc->dev_data = NULL;
1396         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1397                 set_bit(ATM_VF_ADDR,&vcc->flags);
1398         if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
1399         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1400             vcc->vci);
1401         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1402                 zatm_vcc = kmalloc(sizeof(struct zatm_vcc),GFP_KERNEL);
1403                 if (!zatm_vcc) {
1404                         clear_bit(ATM_VF_ADDR,&vcc->flags);
1405                         return -ENOMEM;
1406                 }
1407                 vcc->dev_data = zatm_vcc;
1408                 ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
1409                 if ((error = open_rx_first(vcc))) {
1410                         zatm_close(vcc);
1411                         return error;
1412                 }
1413                 if ((error = open_tx_first(vcc))) {
1414                         zatm_close(vcc);
1415                         return error;
1416                 }
1417         }
1418         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1419         if ((error = open_rx_second(vcc))) {
1420                 zatm_close(vcc);
1421                 return error;
1422         }
1423         if ((error = open_tx_second(vcc))) {
1424                 zatm_close(vcc);
1425                 return error;
1426         }
1427         set_bit(ATM_VF_READY,&vcc->flags);
1428         return 0;
1429 }
1430
1431
1432 static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1433 {
1434         printk("Not yet implemented\n");
1435         return -ENOSYS;
1436         /* @@@ */
1437 }
1438
1439
1440 static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1441 {
1442         struct zatm_dev *zatm_dev;
1443         unsigned long flags;
1444
1445         zatm_dev = ZATM_DEV(dev);
1446         switch (cmd) {
1447                 case ZATM_GETPOOLZ:
1448                         if (!capable(CAP_NET_ADMIN)) return -EPERM;
1449                         /* fall through */
1450                 case ZATM_GETPOOL:
1451                         {
1452                                 struct zatm_pool_info info;
1453                                 int pool;
1454
1455                                 if (get_user(pool,
1456                                     &((struct zatm_pool_req __user *) arg)->pool_num))
1457                                         return -EFAULT;
1458                                 if (pool < 0 || pool > ZATM_LAST_POOL)
1459                                         return -EINVAL;
1460                                 spin_lock_irqsave(&zatm_dev->lock, flags);
1461                                 info = zatm_dev->pool_info[pool];
1462                                 if (cmd == ZATM_GETPOOLZ) {
1463                                         zatm_dev->pool_info[pool].rqa_count = 0;
1464                                         zatm_dev->pool_info[pool].rqu_count = 0;
1465                                 }
1466                                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1467                                 return copy_to_user(
1468                                     &((struct zatm_pool_req __user *) arg)->info,
1469                                     &info,sizeof(info)) ? -EFAULT : 0;
1470                         }
1471                 case ZATM_SETPOOL:
1472                         {
1473                                 struct zatm_pool_info info;
1474                                 int pool;
1475
1476                                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1477                                 if (get_user(pool,
1478                                     &((struct zatm_pool_req __user *) arg)->pool_num))
1479                                         return -EFAULT;
1480                                 if (pool < 0 || pool > ZATM_LAST_POOL)
1481                                         return -EINVAL;
1482                                 if (copy_from_user(&info,
1483                                     &((struct zatm_pool_req __user *) arg)->info,
1484                                     sizeof(info))) return -EFAULT;
1485                                 if (!info.low_water)
1486                                         info.low_water = zatm_dev->
1487                                             pool_info[pool].low_water;
1488                                 if (!info.high_water)
1489                                         info.high_water = zatm_dev->
1490                                             pool_info[pool].high_water;
1491                                 if (!info.next_thres)
1492                                         info.next_thres = zatm_dev->
1493                                             pool_info[pool].next_thres;
1494                                 if (info.low_water >= info.high_water ||
1495                                     info.low_water < 0)
1496                                         return -EINVAL;
1497                                 spin_lock_irqsave(&zatm_dev->lock, flags);
1498                                 zatm_dev->pool_info[pool].low_water =
1499                                     info.low_water;
1500                                 zatm_dev->pool_info[pool].high_water =
1501                                     info.high_water;
1502                                 zatm_dev->pool_info[pool].next_thres =
1503                                     info.next_thres;
1504                                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1505                                 return 0;
1506                         }
1507                 default:
1508                         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
1509                         return dev->phy->ioctl(dev,cmd,arg);
1510         }
1511 }
1512
1513
1514 static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,
1515     void __user *optval,int optlen)
1516 {
1517         return -EINVAL;
1518 }
1519
1520
1521 static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
1522     void __user *optval,unsigned int optlen)
1523 {
1524         return -EINVAL;
1525 }
1526
1527 static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
1528 {
1529         int error;
1530
1531         EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
1532         if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
1533                 if (vcc->pop) vcc->pop(vcc,skb);
1534                 else dev_kfree_skb(skb);
1535                 return -EINVAL;
1536         }
1537         if (!skb) {
1538                 printk(KERN_CRIT "!skb in zatm_send ?\n");
1539                 if (vcc->pop) vcc->pop(vcc,skb);
1540                 return -EINVAL;
1541         }
1542         ATM_SKB(skb)->vcc = vcc;
1543         error = do_tx(skb);
1544         if (error != RING_BUSY) return error;
1545         skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
1546         return 0;
1547 }
1548
1549
1550 static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
1551     unsigned long addr)
1552 {
1553         struct zatm_dev *zatm_dev;
1554
1555         zatm_dev = ZATM_DEV(dev);
1556         zwait;
1557         zout(value,CER);
1558         zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
1559             (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1560 }
1561
1562
1563 static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
1564 {
1565         struct zatm_dev *zatm_dev;
1566
1567         zatm_dev = ZATM_DEV(dev);
1568         zwait;
1569         zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
1570           (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1571         zwait;
1572         return zin(CER) & 0xff;
1573 }
1574
1575
1576 static const struct atmdev_ops ops = {
1577         .open           = zatm_open,
1578         .close          = zatm_close,
1579         .ioctl          = zatm_ioctl,
1580         .getsockopt     = zatm_getsockopt,
1581         .setsockopt     = zatm_setsockopt,
1582         .send           = zatm_send,
1583         .phy_put        = zatm_phy_put,
1584         .phy_get        = zatm_phy_get,
1585         .change_qos     = zatm_change_qos,
1586 };
1587
1588 static int zatm_init_one(struct pci_dev *pci_dev,
1589                          const struct pci_device_id *ent)
1590 {
1591         struct atm_dev *dev;
1592         struct zatm_dev *zatm_dev;
1593         int ret = -ENOMEM;
1594
1595         zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
1596         if (!zatm_dev) {
1597                 printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
1598                 goto out;
1599         }
1600
1601         dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
1602         if (!dev)
1603                 goto out_free;
1604
1605         ret = pci_enable_device(pci_dev);
1606         if (ret < 0)
1607                 goto out_deregister;
1608
1609         ret = pci_request_regions(pci_dev, DEV_LABEL);
1610         if (ret < 0)
1611                 goto out_disable;
1612
1613         ret = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
1614         if (ret < 0)
1615                 goto out_disable;
1616
1617         zatm_dev->pci_dev = pci_dev;
1618         dev->dev_data = zatm_dev;
1619         zatm_dev->copper = (int)ent->driver_data;
1620         if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
1621                 goto out_release;
1622
1623         pci_set_drvdata(pci_dev, dev);
1624         zatm_dev->more = zatm_boards;
1625         zatm_boards = dev;
1626         ret = 0;
1627 out:
1628         return ret;
1629
1630 out_release:
1631         pci_release_regions(pci_dev);
1632 out_disable:
1633         pci_disable_device(pci_dev);
1634 out_deregister:
1635         atm_dev_deregister(dev);
1636 out_free:
1637         kfree(zatm_dev);
1638         goto out;
1639 }
1640
1641
1642 MODULE_LICENSE("GPL");
1643
1644 static struct pci_device_id zatm_pci_tbl[] = {
1645         { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1221), ZATM_COPPER },
1646         { PCI_VDEVICE(ZEITNET, PCI_DEVICE_ID_ZEITNET_1225), 0 },
1647         { 0, }
1648 };
1649 MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
1650
1651 static struct pci_driver zatm_driver = {
1652         .name =         DEV_LABEL,
1653         .id_table =     zatm_pci_tbl,
1654         .probe =        zatm_init_one,
1655 };
1656
1657 static int __init zatm_init_module(void)
1658 {
1659         return pci_register_driver(&zatm_driver);
1660 }
1661
1662 module_init(zatm_init_module);
1663 /* module_exit not defined so not unloadable */