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/dma-mapping.h>
  20 #include <linux/atm_zatm.h>
  21 #include <linux/capability.h>
  22 #include <linux/bitops.h>
  23 #include <linux/wait.h>
  24 #include <linux/slab.h>
  25 #include <asm/byteorder.h>
  26 #include <asm/system.h>
  27 #include <asm/string.h>
  28 #include <asm/io.h>
  29 #include <asm/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(sizeof(struct atm_vcc *)*
1002             zatm_dev->chans,GFP_KERNEL);
1003         if (!zatm_dev->tx_map) return -ENOMEM;
1004         zatm_dev->tx_bw = ATM_OC3_PCR;
1005         zatm_dev->free_shapers = (1 << NR_SHAPERS)-1;
1006         zatm_dev->ubr = -1;
1007         zatm_dev->ubr_ref_cnt = 0;
1008         /* initialize shapers */
1009         for (i = 0; i < NR_SHAPERS; i++) zpokel(zatm_dev,0,uPD98401_PS(i));
1010         return 0;
1011 }
1012
1013
1014 /*------------------------------- interrupts --------------------------------*/
1015
1016
1017 static irqreturn_t zatm_int(int irq,void *dev_id)
1018 {
1019         struct atm_dev *dev;
1020         struct zatm_dev *zatm_dev;
1021         u32 reason;
1022         int handled = 0;
1023
1024         dev = dev_id;
1025         zatm_dev = ZATM_DEV(dev);
1026         while ((reason = zin(GSR))) {
1027                 handled = 1;
1028                 EVENT("reason 0x%x\n",reason,0);
1029                 if (reason & uPD98401_INT_PI) {
1030                         EVENT("PHY int\n",0,0);
1031                         dev->phy->interrupt(dev);
1032                 }
1033                 if (reason & uPD98401_INT_RQA) {
1034                         unsigned long pools;
1035                         int i;
1036
1037                         pools = zin(RQA);
1038                         EVENT("RQA (0x%08x)\n",pools,0);
1039                         for (i = 0; pools; i++) {
1040                                 if (pools & 1) {
1041                                         refill_pool(dev,i);
1042                                         zatm_dev->pool_info[i].rqa_count++;
1043                                 }
1044                                 pools >>= 1;
1045                         }
1046                 }
1047                 if (reason & uPD98401_INT_RQU) {
1048                         unsigned long pools;
1049                         int i;
1050                         pools = zin(RQU);
1051                         printk(KERN_WARNING DEV_LABEL "(itf %d): RQU 0x%08lx\n",
1052                             dev->number,pools);
1053                         event_dump();
1054                         for (i = 0; pools; i++) {
1055                                 if (pools & 1) {
1056                                         refill_pool(dev,i);
1057                                         zatm_dev->pool_info[i].rqu_count++;
1058                                 }
1059                                 pools >>= 1;
1060                         }
1061                 }
1062                 /* don't handle RD */
1063                 if (reason & uPD98401_INT_SPE)
1064                         printk(KERN_ALERT DEV_LABEL "(itf %d): system parity "
1065                             "error at 0x%08x\n",dev->number,zin(ADDR));
1066                 if (reason & uPD98401_INT_CPE)
1067                         printk(KERN_ALERT DEV_LABEL "(itf %d): control memory "
1068                             "parity error at 0x%08x\n",dev->number,zin(ADDR));
1069                 if (reason & uPD98401_INT_SBE) {
1070                         printk(KERN_ALERT DEV_LABEL "(itf %d): system bus "
1071                             "error at 0x%08x\n",dev->number,zin(ADDR));
1072                         event_dump();
1073                 }
1074                 /* don't handle IND */
1075                 if (reason & uPD98401_INT_MF) {
1076                         printk(KERN_CRIT DEV_LABEL "(itf %d): mailbox full "
1077                             "(0x%x)\n",dev->number,(reason & uPD98401_INT_MF)
1078                             >> uPD98401_INT_MF_SHIFT);
1079                         event_dump();
1080                             /* @@@ should try to recover */
1081                 }
1082                 if (reason & uPD98401_INT_MM) {
1083                         if (reason & 1) poll_rx(dev,0);
1084                         if (reason & 2) poll_rx(dev,1);
1085                         if (reason & 4) poll_tx(dev,2);
1086                         if (reason & 8) poll_tx(dev,3);
1087                 }
1088                 /* @@@ handle RCRn */
1089         }
1090         return IRQ_RETVAL(handled);
1091 }
1092
1093
1094 /*----------------------------- (E)EPROM access -----------------------------*/
1095
1096
1097 static void __devinit eprom_set(struct zatm_dev *zatm_dev,unsigned long value,
1098     unsigned short cmd)
1099 {
1100         int error;
1101
1102         if ((error = pci_write_config_dword(zatm_dev->pci_dev,cmd,value)))
1103                 printk(KERN_ERR DEV_LABEL ": PCI write failed (0x%02x)\n",
1104                     error);
1105 }
1106
1107
1108 static unsigned long __devinit eprom_get(struct zatm_dev *zatm_dev,
1109     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 __devinit eprom_put_bits(struct zatm_dev *zatm_dev,
1122     unsigned long data,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 __devinit eprom_get_byte(struct zatm_dev *zatm_dev,
1137     unsigned char *byte,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 __devinit eprom_try_esi(struct atm_dev *dev,
1153     unsigned short cmd,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 __devinit 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 __devinit 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 __devinit 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 = pci_alloc_consistent(pdev, 2*MBX_SIZE(i), &mbx_dma);
1311                 if (!mbx) {
1312                         error = -ENOMEM;
1313                         goto out;
1314                 }
1315                 /*
1316                  * Alignment provided by pci_alloc_consistent() isn't enough
1317                  * for this device.
1318                  */
1319                 if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
1320                         printk(KERN_ERR DEV_LABEL "(itf %d): system "
1321                                "bus incompatible with driver\n", dev->number);
1322                         pci_free_consistent(pdev, 2*MBX_SIZE(i), mbx, mbx_dma);
1323                         error = -ENODEV;
1324                         goto out;
1325                 }
1326                 DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
1327                 zatm_dev->mbx_start[i] = (unsigned long)mbx;
1328                 zatm_dev->mbx_dma[i] = mbx_dma;
1329                 zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
1330                                         0xffff;
1331                 zout(mbx_dma >> 16, MSH(i));
1332                 zout(mbx_dma, MSL(i));
1333                 zout(zatm_dev->mbx_end[i], MBA(i));
1334                 zout((unsigned long)mbx & 0xffff, MTA(i));
1335                 zout((unsigned long)mbx & 0xffff, MWA(i));
1336         }
1337         error = start_tx(dev);
1338         if (error)
1339                 goto out;
1340         error = start_rx(dev);
1341         if (error)
1342                 goto out_tx;
1343         error = dev->phy->start(dev);
1344         if (error)
1345                 goto out_rx;
1346         zout(0xffffffff,IMR); /* enable interrupts */
1347         /* enable TX & RX */
1348         zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
1349 done:
1350         return error;
1351
1352 out_rx:
1353         kfree(zatm_dev->rx_map);
1354 out_tx:
1355         kfree(zatm_dev->tx_map);
1356 out:
1357         while (i-- > 0) {
1358                 pci_free_consistent(pdev, 2*MBX_SIZE(i),
1359                                     (void *)zatm_dev->mbx_start[i],
1360                                     zatm_dev->mbx_dma[i]);
1361         }
1362         free_irq(zatm_dev->irq, dev);
1363         goto done;
1364 }
1365
1366
1367 static void zatm_close(struct atm_vcc *vcc)
1368 {
1369         DPRINTK(">zatm_close\n");
1370         if (!ZATM_VCC(vcc)) return;
1371         clear_bit(ATM_VF_READY,&vcc->flags);
1372         close_rx(vcc);
1373         EVENT("close_tx\n",0,0);
1374         close_tx(vcc);
1375         DPRINTK("zatm_close: done waiting\n");
1376         /* deallocate memory */
1377         kfree(ZATM_VCC(vcc));
1378         vcc->dev_data = NULL;
1379         clear_bit(ATM_VF_ADDR,&vcc->flags);
1380 }
1381
1382
1383 static int zatm_open(struct atm_vcc *vcc)
1384 {
1385         struct zatm_dev *zatm_dev;
1386         struct zatm_vcc *zatm_vcc;
1387         short vpi = vcc->vpi;
1388         int vci = vcc->vci;
1389         int error;
1390
1391         DPRINTK(">zatm_open\n");
1392         zatm_dev = ZATM_DEV(vcc->dev);
1393         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1394                 vcc->dev_data = NULL;
1395         if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1396                 set_bit(ATM_VF_ADDR,&vcc->flags);
1397         if (vcc->qos.aal != ATM_AAL5) return -EINVAL; /* @@@ AAL0 */
1398         DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1399             vcc->vci);
1400         if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1401                 zatm_vcc = kmalloc(sizeof(struct zatm_vcc),GFP_KERNEL);
1402                 if (!zatm_vcc) {
1403                         clear_bit(ATM_VF_ADDR,&vcc->flags);
1404                         return -ENOMEM;
1405                 }
1406                 vcc->dev_data = zatm_vcc;
1407                 ZATM_VCC(vcc)->tx_chan = 0; /* for zatm_close after open_rx */
1408                 if ((error = open_rx_first(vcc))) {
1409                         zatm_close(vcc);
1410                         return error;
1411                 }
1412                 if ((error = open_tx_first(vcc))) {
1413                         zatm_close(vcc);
1414                         return error;
1415                 }
1416         }
1417         if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1418         if ((error = open_rx_second(vcc))) {
1419                 zatm_close(vcc);
1420                 return error;
1421         }
1422         if ((error = open_tx_second(vcc))) {
1423                 zatm_close(vcc);
1424                 return error;
1425         }
1426         set_bit(ATM_VF_READY,&vcc->flags);
1427         return 0;
1428 }
1429
1430
1431 static int zatm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1432 {
1433         printk("Not yet implemented\n");
1434         return -ENOSYS;
1435         /* @@@ */
1436 }
1437
1438
1439 static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1440 {
1441         struct zatm_dev *zatm_dev;
1442         unsigned long flags;
1443
1444         zatm_dev = ZATM_DEV(dev);
1445         switch (cmd) {
1446                 case ZATM_GETPOOLZ:
1447                         if (!capable(CAP_NET_ADMIN)) return -EPERM;
1448                         /* fall through */
1449                 case ZATM_GETPOOL:
1450                         {
1451                                 struct zatm_pool_info info;
1452                                 int pool;
1453
1454                                 if (get_user(pool,
1455                                     &((struct zatm_pool_req __user *) arg)->pool_num))
1456                                         return -EFAULT;
1457                                 if (pool < 0 || pool > ZATM_LAST_POOL)
1458                                         return -EINVAL;
1459                                 spin_lock_irqsave(&zatm_dev->lock, flags);
1460                                 info = zatm_dev->pool_info[pool];
1461                                 if (cmd == ZATM_GETPOOLZ) {
1462                                         zatm_dev->pool_info[pool].rqa_count = 0;
1463                                         zatm_dev->pool_info[pool].rqu_count = 0;
1464                                 }
1465                                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1466                                 return copy_to_user(
1467                                     &((struct zatm_pool_req __user *) arg)->info,
1468                                     &info,sizeof(info)) ? -EFAULT : 0;
1469                         }
1470                 case ZATM_SETPOOL:
1471                         {
1472                                 struct zatm_pool_info info;
1473                                 int pool;
1474
1475                                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1476                                 if (get_user(pool,
1477                                     &((struct zatm_pool_req __user *) arg)->pool_num))
1478                                         return -EFAULT;
1479                                 if (pool < 0 || pool > ZATM_LAST_POOL)
1480                                         return -EINVAL;
1481                                 if (copy_from_user(&info,
1482                                     &((struct zatm_pool_req __user *) arg)->info,
1483                                     sizeof(info))) return -EFAULT;
1484                                 if (!info.low_water)
1485                                         info.low_water = zatm_dev->
1486                                             pool_info[pool].low_water;
1487                                 if (!info.high_water)
1488                                         info.high_water = zatm_dev->
1489                                             pool_info[pool].high_water;
1490                                 if (!info.next_thres)
1491                                         info.next_thres = zatm_dev->
1492                                             pool_info[pool].next_thres;
1493                                 if (info.low_water >= info.high_water ||
1494                                     info.low_water < 0)
1495                                         return -EINVAL;
1496                                 spin_lock_irqsave(&zatm_dev->lock, flags);
1497                                 zatm_dev->pool_info[pool].low_water =
1498                                     info.low_water;
1499                                 zatm_dev->pool_info[pool].high_water =
1500                                     info.high_water;
1501                                 zatm_dev->pool_info[pool].next_thres =
1502                                     info.next_thres;
1503                                 spin_unlock_irqrestore(&zatm_dev->lock, flags);
1504                                 return 0;
1505                         }
1506                 default:
1507                         if (!dev->phy->ioctl) return -ENOIOCTLCMD;
1508                         return dev->phy->ioctl(dev,cmd,arg);
1509         }
1510 }
1511
1512
1513 static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,
1514     void __user *optval,int optlen)
1515 {
1516         return -EINVAL;
1517 }
1518
1519
1520 static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
1521     void __user *optval,unsigned int optlen)
1522 {
1523         return -EINVAL;
1524 }
1525
1526 static int zatm_send(struct atm_vcc *vcc,struct sk_buff *skb)
1527 {
1528         int error;
1529
1530         EVENT(">zatm_send 0x%lx\n",(unsigned long) skb,0);
1531         if (!ZATM_VCC(vcc)->tx_chan || !test_bit(ATM_VF_READY,&vcc->flags)) {
1532                 if (vcc->pop) vcc->pop(vcc,skb);
1533                 else dev_kfree_skb(skb);
1534                 return -EINVAL;
1535         }
1536         if (!skb) {
1537                 printk(KERN_CRIT "!skb in zatm_send ?\n");
1538                 if (vcc->pop) vcc->pop(vcc,skb);
1539                 return -EINVAL;
1540         }
1541         ATM_SKB(skb)->vcc = vcc;
1542         error = do_tx(skb);
1543         if (error != RING_BUSY) return error;
1544         skb_queue_tail(&ZATM_VCC(vcc)->backlog,skb);
1545         return 0;
1546 }
1547
1548
1549 static void zatm_phy_put(struct atm_dev *dev,unsigned char value,
1550     unsigned long addr)
1551 {
1552         struct zatm_dev *zatm_dev;
1553
1554         zatm_dev = ZATM_DEV(dev);
1555         zwait;
1556         zout(value,CER);
1557         zout(uPD98401_IND_ACC | uPD98401_IA_B0 |
1558             (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1559 }
1560
1561
1562 static unsigned char zatm_phy_get(struct atm_dev *dev,unsigned long addr)
1563 {
1564         struct zatm_dev *zatm_dev;
1565
1566         zatm_dev = ZATM_DEV(dev);
1567         zwait;
1568         zout(uPD98401_IND_ACC | uPD98401_IA_B0 | uPD98401_IA_RW |
1569           (uPD98401_IA_TGT_PHY << uPD98401_IA_TGT_SHIFT) | addr,CMR);
1570         zwait;
1571         return zin(CER) & 0xff;
1572 }
1573
1574
1575 static const struct atmdev_ops ops = {
1576         .open           = zatm_open,
1577         .close          = zatm_close,
1578         .ioctl          = zatm_ioctl,
1579         .getsockopt     = zatm_getsockopt,
1580         .setsockopt     = zatm_setsockopt,
1581         .send           = zatm_send,
1582         .phy_put        = zatm_phy_put,
1583         .phy_get        = zatm_phy_get,
1584         .change_qos     = zatm_change_qos,
1585 };
1586
1587 static int __devinit zatm_init_one(struct pci_dev *pci_dev,
1588                                    const struct pci_device_id *ent)
1589 {
1590         struct atm_dev *dev;
1591         struct zatm_dev *zatm_dev;
1592         int ret = -ENOMEM;
1593
1594         zatm_dev = kmalloc(sizeof(*zatm_dev), GFP_KERNEL);
1595         if (!zatm_dev) {
1596                 printk(KERN_EMERG "%s: memory shortage\n", DEV_LABEL);
1597                 goto out;
1598         }
1599
1600         dev = atm_dev_register(DEV_LABEL, &ops, -1, NULL);
1601         if (!dev)
1602                 goto out_free;
1603
1604         ret = pci_enable_device(pci_dev);
1605         if (ret < 0)
1606                 goto out_deregister;
1607
1608         ret = pci_request_regions(pci_dev, DEV_LABEL);
1609         if (ret < 0)
1610                 goto out_disable;
1611
1612         zatm_dev->pci_dev = pci_dev;
1613         dev->dev_data = zatm_dev;
1614         zatm_dev->copper = (int)ent->driver_data;
1615         if ((ret = zatm_init(dev)) || (ret = zatm_start(dev)))
1616                 goto out_release;
1617
1618         pci_set_drvdata(pci_dev, dev);
1619         zatm_dev->more = zatm_boards;
1620         zatm_boards = dev;
1621         ret = 0;
1622 out:
1623         return ret;
1624
1625 out_release:
1626         pci_release_regions(pci_dev);
1627 out_disable:
1628         pci_disable_device(pci_dev);
1629 out_deregister:
1630         atm_dev_deregister(dev);
1631 out_free:
1632         kfree(zatm_dev);
1633         goto out;
1634 }
1635
1636
1637 MODULE_LICENSE("GPL");
1638
1639 static struct pci_device_id zatm_pci_tbl[] __devinitdata = {
1640         { PCI_VENDOR_ID_ZEITNET, PCI_DEVICE_ID_ZEITNET_1221,
1641                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ZATM_COPPER },
1642         { PCI_VENDOR_ID_ZEITNET, PCI_DEVICE_ID_ZEITNET_1225,
1643                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1644         { 0, }
1645 };
1646 MODULE_DEVICE_TABLE(pci, zatm_pci_tbl);
1647
1648 static struct pci_driver zatm_driver = {
1649         .name =         DEV_LABEL,
1650         .id_table =     zatm_pci_tbl,
1651         .probe =        zatm_init_one,
1652 };
1653
1654 static int __init zatm_init_module(void)
1655 {
1656         return pci_register_driver(&zatm_driver);
1657 }
1658
1659 module_init(zatm_init_module);
1660 /* module_exit not defined so not unloadable */