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Linux/drivers/net/ethernet/amd/declance.c

  1 /*
  2  *    Lance ethernet driver for the MIPS processor based
  3  *      DECstation family
  4  *
  5  *
  6  *      adopted from sunlance.c by Richard van den Berg
  7  *
  8  *      Copyright (C) 2002, 2003, 2005, 2006  Maciej W. Rozycki
  9  *
 10  *      additional sources:
 11  *      - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
 12  *        Revision 1.2
 13  *
 14  *      History:
 15  *
 16  *      v0.001: The kernel accepts the code and it shows the hardware address.
 17  *
 18  *      v0.002: Removed most sparc stuff, left only some module and dma stuff.
 19  *
 20  *      v0.003: Enhanced base address calculation from proposals by
 21  *              Harald Koerfgen and Thomas Riemer.
 22  *
 23  *      v0.004: lance-regs is pointing at the right addresses, added prom
 24  *              check. First start of address mapping and DMA.
 25  *
 26  *      v0.005: started to play around with LANCE-DMA. This driver will not
 27  *              work for non IOASIC lances. HK
 28  *
 29  *      v0.006: added pointer arrays to lance_private and setup routine for
 30  *              them in dec_lance_init. HK
 31  *
 32  *      v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
 33  *              access the init block. This looks like one (short) word at a
 34  *              time, but the smallest amount the IOASIC can transfer is a
 35  *              (long) word. So we have a 2-2 padding here. Changed
 36  *              lance_init_block accordingly. The 16-16 padding for the buffers
 37  *              seems to be correct. HK
 38  *
 39  *      v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
 40  *
 41  *      v0.009: Module support fixes, multiple interfaces support, various
 42  *              bits. macro
 43  *
 44  *      v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
 45  *              PMAX requirement to only use halfword accesses to the
 46  *              buffer. macro
 47  *
 48  *      v0.011: Converted the PMAD to the driver model. macro
 49  */
 50 
 51 #include <linux/crc32.h>
 52 #include <linux/delay.h>
 53 #include <linux/errno.h>
 54 #include <linux/if_ether.h>
 55 #include <linux/init.h>
 56 #include <linux/kernel.h>
 57 #include <linux/module.h>
 58 #include <linux/netdevice.h>
 59 #include <linux/etherdevice.h>
 60 #include <linux/spinlock.h>
 61 #include <linux/stddef.h>
 62 #include <linux/string.h>
 63 #include <linux/tc.h>
 64 #include <linux/types.h>
 65 
 66 #include <asm/addrspace.h>
 67 
 68 #include <asm/dec/interrupts.h>
 69 #include <asm/dec/ioasic.h>
 70 #include <asm/dec/ioasic_addrs.h>
 71 #include <asm/dec/kn01.h>
 72 #include <asm/dec/machtype.h>
 73 #include <asm/dec/system.h>
 74 
 75 static char version[] =
 76 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
 77 
 78 MODULE_AUTHOR("Linux MIPS DECstation task force");
 79 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
 80 MODULE_LICENSE("GPL");
 81 
 82 #define __unused __attribute__ ((unused))
 83 
 84 /*
 85  * card types
 86  */
 87 #define ASIC_LANCE 1
 88 #define PMAD_LANCE 2
 89 #define PMAX_LANCE 3
 90 
 91 
 92 #define LE_CSR0 0
 93 #define LE_CSR1 1
 94 #define LE_CSR2 2
 95 #define LE_CSR3 3
 96 
 97 #define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
 98 
 99 #define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
100 #define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
101 #define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
102 #define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
103 #define LE_C0_MERR      0x0800  /* ME:   Memory error */
104 #define LE_C0_RINT      0x0400  /* Received interrupt */
105 #define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
106 #define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
107 #define LE_C0_INTR      0x0080  /* Interrupt or error */
108 #define LE_C0_INEA      0x0040  /* Interrupt enable */
109 #define LE_C0_RXON      0x0020  /* Receiver on */
110 #define LE_C0_TXON      0x0010  /* Transmitter on */
111 #define LE_C0_TDMD      0x0008  /* Transmitter demand */
112 #define LE_C0_STOP      0x0004  /* Stop the card */
113 #define LE_C0_STRT      0x0002  /* Start the card */
114 #define LE_C0_INIT      0x0001  /* Init the card */
115 
116 #define LE_C3_BSWP      0x4     /* SWAP */
117 #define LE_C3_ACON      0x2     /* ALE Control */
118 #define LE_C3_BCON      0x1     /* Byte control */
119 
120 /* Receive message descriptor 1 */
121 #define LE_R1_OWN       0x8000  /* Who owns the entry */
122 #define LE_R1_ERR       0x4000  /* Error: if FRA, OFL, CRC or BUF is set */
123 #define LE_R1_FRA       0x2000  /* FRA: Frame error */
124 #define LE_R1_OFL       0x1000  /* OFL: Frame overflow */
125 #define LE_R1_CRC       0x0800  /* CRC error */
126 #define LE_R1_BUF       0x0400  /* BUF: Buffer error */
127 #define LE_R1_SOP       0x0200  /* Start of packet */
128 #define LE_R1_EOP       0x0100  /* End of packet */
129 #define LE_R1_POK       0x0300  /* Packet is complete: SOP + EOP */
130 
131 /* Transmit message descriptor 1 */
132 #define LE_T1_OWN       0x8000  /* Lance owns the packet */
133 #define LE_T1_ERR       0x4000  /* Error summary */
134 #define LE_T1_EMORE     0x1000  /* Error: more than one retry needed */
135 #define LE_T1_EONE      0x0800  /* Error: one retry needed */
136 #define LE_T1_EDEF      0x0400  /* Error: deferred */
137 #define LE_T1_SOP       0x0200  /* Start of packet */
138 #define LE_T1_EOP       0x0100  /* End of packet */
139 #define LE_T1_POK       0x0300  /* Packet is complete: SOP + EOP */
140 
141 #define LE_T3_BUF       0x8000  /* Buffer error */
142 #define LE_T3_UFL       0x4000  /* Error underflow */
143 #define LE_T3_LCOL      0x1000  /* Error late collision */
144 #define LE_T3_CLOS      0x0800  /* Error carrier loss */
145 #define LE_T3_RTY       0x0400  /* Error retry */
146 #define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
147 
148 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
149 
150 #ifndef LANCE_LOG_TX_BUFFERS
151 #define LANCE_LOG_TX_BUFFERS 4
152 #define LANCE_LOG_RX_BUFFERS 4
153 #endif
154 
155 #define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
156 #define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
157 
158 #define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
159 #define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
160 
161 #define PKT_BUF_SZ              1536
162 #define RX_BUFF_SIZE            PKT_BUF_SZ
163 #define TX_BUFF_SIZE            PKT_BUF_SZ
164 
165 #undef TEST_HITS
166 #define ZERO 0
167 
168 /*
169  * The DS2100/3100 have a linear 64 kB buffer which supports halfword
170  * accesses only.  Each halfword of the buffer is word-aligned in the
171  * CPU address space.
172  *
173  * The PMAD-AA has a 128 kB buffer on-board.
174  *
175  * The IOASIC LANCE devices use a shared memory region.  This region
176  * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
177  * boundary.  The LANCE sees this as a 64 kB long continuous memory
178  * region.
179  *
180  * The LANCE's DMA address is used as an index in this buffer and DMA
181  * takes place in bursts of eight 16-bit words which are packed into
182  * four 32-bit words by the IOASIC.  This leads to a strange padding:
183  * 16 bytes of valid data followed by a 16 byte gap :-(.
184  */
185 
186 struct lance_rx_desc {
187         unsigned short rmd0;            /* low address of packet */
188         unsigned short rmd1;            /* high address of packet
189                                            and descriptor bits */
190         short length;                   /* 2s complement (negative!)
191                                            of buffer length */
192         unsigned short mblength;        /* actual number of bytes received */
193 };
194 
195 struct lance_tx_desc {
196         unsigned short tmd0;            /* low address of packet */
197         unsigned short tmd1;            /* high address of packet
198                                            and descriptor bits */
199         short length;                   /* 2s complement (negative!)
200                                            of buffer length */
201         unsigned short misc;
202 };
203 
204 
205 /* First part of the LANCE initialization block, described in databook. */
206 struct lance_init_block {
207         unsigned short mode;            /* pre-set mode (reg. 15) */
208 
209         unsigned short phys_addr[3];    /* physical ethernet address */
210         unsigned short filter[4];       /* multicast filter */
211 
212         /* Receive and transmit ring base, along with extra bits. */
213         unsigned short rx_ptr;          /* receive descriptor addr */
214         unsigned short rx_len;          /* receive len and high addr */
215         unsigned short tx_ptr;          /* transmit descriptor addr */
216         unsigned short tx_len;          /* transmit len and high addr */
217 
218         short gap[4];
219 
220         /* The buffer descriptors */
221         struct lance_rx_desc brx_ring[RX_RING_SIZE];
222         struct lance_tx_desc btx_ring[TX_RING_SIZE];
223 };
224 
225 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
226 #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
227 
228 #define shift_off(off, type)                                            \
229         (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
230 
231 #define lib_off(rt, type)                                               \
232         shift_off(offsetof(struct lance_init_block, rt), type)
233 
234 #define lib_ptr(ib, rt, type)                                           \
235         ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
236 
237 #define rds_off(rt, type)                                               \
238         shift_off(offsetof(struct lance_rx_desc, rt), type)
239 
240 #define rds_ptr(rd, rt, type)                                           \
241         ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
242 
243 #define tds_off(rt, type)                                               \
244         shift_off(offsetof(struct lance_tx_desc, rt), type)
245 
246 #define tds_ptr(td, rt, type)                                           \
247         ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
248 
249 struct lance_private {
250         struct net_device *next;
251         int type;
252         int dma_irq;
253         volatile struct lance_regs *ll;
254 
255         spinlock_t      lock;
256 
257         int rx_new, tx_new;
258         int rx_old, tx_old;
259 
260         unsigned short busmaster_regval;
261 
262         struct timer_list       multicast_timer;
263 
264         /* Pointers to the ring buffers as seen from the CPU */
265         char *rx_buf_ptr_cpu[RX_RING_SIZE];
266         char *tx_buf_ptr_cpu[TX_RING_SIZE];
267 
268         /* Pointers to the ring buffers as seen from the LANCE */
269         uint rx_buf_ptr_lnc[RX_RING_SIZE];
270         uint tx_buf_ptr_lnc[TX_RING_SIZE];
271 };
272 
273 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
274                         lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
275                         lp->tx_old - lp->tx_new-1)
276 
277 /* The lance control ports are at an absolute address, machine and tc-slot
278  * dependent.
279  * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
280  * so we have to give the structure an extra member making rap pointing
281  * at the right address
282  */
283 struct lance_regs {
284         volatile unsigned short rdp;    /* register data port */
285         unsigned short pad;
286         volatile unsigned short rap;    /* register address port */
287 };
288 
289 int dec_lance_debug = 2;
290 
291 static struct tc_driver dec_lance_tc_driver;
292 static struct net_device *root_lance_dev;
293 
294 static inline void writereg(volatile unsigned short *regptr, short value)
295 {
296         *regptr = value;
297         iob();
298 }
299 
300 /* Load the CSR registers */
301 static void load_csrs(struct lance_private *lp)
302 {
303         volatile struct lance_regs *ll = lp->ll;
304         uint leptr;
305 
306         /* The address space as seen from the LANCE
307          * begins at address 0. HK
308          */
309         leptr = 0;
310 
311         writereg(&ll->rap, LE_CSR1);
312         writereg(&ll->rdp, (leptr & 0xFFFF));
313         writereg(&ll->rap, LE_CSR2);
314         writereg(&ll->rdp, leptr >> 16);
315         writereg(&ll->rap, LE_CSR3);
316         writereg(&ll->rdp, lp->busmaster_regval);
317 
318         /* Point back to csr0 */
319         writereg(&ll->rap, LE_CSR0);
320 }
321 
322 /*
323  * Our specialized copy routines
324  *
325  */
326 static void cp_to_buf(const int type, void *to, const void *from, int len)
327 {
328         unsigned short *tp;
329         const unsigned short *fp;
330         unsigned short clen;
331         unsigned char *rtp;
332         const unsigned char *rfp;
333 
334         if (type == PMAD_LANCE) {
335                 memcpy(to, from, len);
336         } else if (type == PMAX_LANCE) {
337                 clen = len >> 1;
338                 tp = to;
339                 fp = from;
340 
341                 while (clen--) {
342                         *tp++ = *fp++;
343                         tp++;
344                 }
345 
346                 clen = len & 1;
347                 rtp = (unsigned char *)tp;
348                 rfp = (const unsigned char *)fp;
349                 while (clen--) {
350                         *rtp++ = *rfp++;
351                 }
352         } else {
353                 /*
354                  * copy 16 Byte chunks
355                  */
356                 clen = len >> 4;
357                 tp = to;
358                 fp = from;
359                 while (clen--) {
360                         *tp++ = *fp++;
361                         *tp++ = *fp++;
362                         *tp++ = *fp++;
363                         *tp++ = *fp++;
364                         *tp++ = *fp++;
365                         *tp++ = *fp++;
366                         *tp++ = *fp++;
367                         *tp++ = *fp++;
368                         tp += 8;
369                 }
370 
371                 /*
372                  * do the rest, if any.
373                  */
374                 clen = len & 15;
375                 rtp = (unsigned char *)tp;
376                 rfp = (const unsigned char *)fp;
377                 while (clen--) {
378                         *rtp++ = *rfp++;
379                 }
380         }
381 
382         iob();
383 }
384 
385 static void cp_from_buf(const int type, void *to, const void *from, int len)
386 {
387         unsigned short *tp;
388         const unsigned short *fp;
389         unsigned short clen;
390         unsigned char *rtp;
391         const unsigned char *rfp;
392 
393         if (type == PMAD_LANCE) {
394                 memcpy(to, from, len);
395         } else if (type == PMAX_LANCE) {
396                 clen = len >> 1;
397                 tp = to;
398                 fp = from;
399                 while (clen--) {
400                         *tp++ = *fp++;
401                         fp++;
402                 }
403 
404                 clen = len & 1;
405 
406                 rtp = (unsigned char *)tp;
407                 rfp = (const unsigned char *)fp;
408 
409                 while (clen--) {
410                         *rtp++ = *rfp++;
411                 }
412         } else {
413 
414                 /*
415                  * copy 16 Byte chunks
416                  */
417                 clen = len >> 4;
418                 tp = to;
419                 fp = from;
420                 while (clen--) {
421                         *tp++ = *fp++;
422                         *tp++ = *fp++;
423                         *tp++ = *fp++;
424                         *tp++ = *fp++;
425                         *tp++ = *fp++;
426                         *tp++ = *fp++;
427                         *tp++ = *fp++;
428                         *tp++ = *fp++;
429                         fp += 8;
430                 }
431 
432                 /*
433                  * do the rest, if any.
434                  */
435                 clen = len & 15;
436                 rtp = (unsigned char *)tp;
437                 rfp = (const unsigned char *)fp;
438                 while (clen--) {
439                         *rtp++ = *rfp++;
440                 }
441 
442 
443         }
444 
445 }
446 
447 /* Setup the Lance Rx and Tx rings */
448 static void lance_init_ring(struct net_device *dev)
449 {
450         struct lance_private *lp = netdev_priv(dev);
451         volatile u16 *ib = (volatile u16 *)dev->mem_start;
452         uint leptr;
453         int i;
454 
455         /* Lock out other processes while setting up hardware */
456         netif_stop_queue(dev);
457         lp->rx_new = lp->tx_new = 0;
458         lp->rx_old = lp->tx_old = 0;
459 
460         /* Copy the ethernet address to the lance init block.
461          * XXX bit 0 of the physical address registers has to be zero
462          */
463         *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
464                                      dev->dev_addr[0];
465         *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
466                                      dev->dev_addr[2];
467         *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
468                                      dev->dev_addr[4];
469         /* Setup the initialization block */
470 
471         /* Setup rx descriptor pointer */
472         leptr = offsetof(struct lance_init_block, brx_ring);
473         *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
474                                          (leptr >> 16);
475         *lib_ptr(ib, rx_ptr, lp->type) = leptr;
476         if (ZERO)
477                 printk("RX ptr: %8.8x(%8.8x)\n",
478                        leptr, (uint)lib_off(brx_ring, lp->type));
479 
480         /* Setup tx descriptor pointer */
481         leptr = offsetof(struct lance_init_block, btx_ring);
482         *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
483                                          (leptr >> 16);
484         *lib_ptr(ib, tx_ptr, lp->type) = leptr;
485         if (ZERO)
486                 printk("TX ptr: %8.8x(%8.8x)\n",
487                        leptr, (uint)lib_off(btx_ring, lp->type));
488 
489         if (ZERO)
490                 printk("TX rings:\n");
491 
492         /* Setup the Tx ring entries */
493         for (i = 0; i < TX_RING_SIZE; i++) {
494                 leptr = lp->tx_buf_ptr_lnc[i];
495                 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
496                 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
497                                                            0xff;
498                 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
499                                                 /* The ones required by tmd2 */
500                 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
501                 if (i < 3 && ZERO)
502                         printk("%d: %8.8x(%p)\n",
503                                i, leptr, lp->tx_buf_ptr_cpu[i]);
504         }
505 
506         /* Setup the Rx ring entries */
507         if (ZERO)
508                 printk("RX rings:\n");
509         for (i = 0; i < RX_RING_SIZE; i++) {
510                 leptr = lp->rx_buf_ptr_lnc[i];
511                 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
512                 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
513                                                             0xff) |
514                                                            LE_R1_OWN;
515                 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
516                                                              0xf000;
517                 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
518                 if (i < 3 && ZERO)
519                         printk("%d: %8.8x(%p)\n",
520                                i, leptr, lp->rx_buf_ptr_cpu[i]);
521         }
522         iob();
523 }
524 
525 static int init_restart_lance(struct lance_private *lp)
526 {
527         volatile struct lance_regs *ll = lp->ll;
528         int i;
529 
530         writereg(&ll->rap, LE_CSR0);
531         writereg(&ll->rdp, LE_C0_INIT);
532 
533         /* Wait for the lance to complete initialization */
534         for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
535                 udelay(10);
536         }
537         if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
538                 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
539                        i, ll->rdp);
540                 return -1;
541         }
542         if ((ll->rdp & LE_C0_ERR)) {
543                 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
544                        i, ll->rdp);
545                 return -1;
546         }
547         writereg(&ll->rdp, LE_C0_IDON);
548         writereg(&ll->rdp, LE_C0_STRT);
549         writereg(&ll->rdp, LE_C0_INEA);
550 
551         return 0;
552 }
553 
554 static int lance_rx(struct net_device *dev)
555 {
556         struct lance_private *lp = netdev_priv(dev);
557         volatile u16 *ib = (volatile u16 *)dev->mem_start;
558         volatile u16 *rd;
559         unsigned short bits;
560         int entry, len;
561         struct sk_buff *skb;
562 
563 #ifdef TEST_HITS
564         {
565                 int i;
566 
567                 printk("[");
568                 for (i = 0; i < RX_RING_SIZE; i++) {
569                         if (i == lp->rx_new)
570                                 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
571                                                       lp->type) &
572                                              LE_R1_OWN ? "_" : "X");
573                         else
574                                 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
575                                                       lp->type) &
576                                              LE_R1_OWN ? "." : "1");
577                 }
578                 printk("]");
579         }
580 #endif
581 
582         for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
583              !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
584              rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
585                 entry = lp->rx_new;
586 
587                 /* We got an incomplete frame? */
588                 if ((bits & LE_R1_POK) != LE_R1_POK) {
589                         dev->stats.rx_over_errors++;
590                         dev->stats.rx_errors++;
591                 } else if (bits & LE_R1_ERR) {
592                         /* Count only the end frame as a rx error,
593                          * not the beginning
594                          */
595                         if (bits & LE_R1_BUF)
596                                 dev->stats.rx_fifo_errors++;
597                         if (bits & LE_R1_CRC)
598                                 dev->stats.rx_crc_errors++;
599                         if (bits & LE_R1_OFL)
600                                 dev->stats.rx_over_errors++;
601                         if (bits & LE_R1_FRA)
602                                 dev->stats.rx_frame_errors++;
603                         if (bits & LE_R1_EOP)
604                                 dev->stats.rx_errors++;
605                 } else {
606                         len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
607                         skb = netdev_alloc_skb(dev, len + 2);
608 
609                         if (skb == 0) {
610                                 dev->stats.rx_dropped++;
611                                 *rds_ptr(rd, mblength, lp->type) = 0;
612                                 *rds_ptr(rd, rmd1, lp->type) =
613                                         ((lp->rx_buf_ptr_lnc[entry] >> 16) &
614                                          0xff) | LE_R1_OWN;
615                                 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
616                                 return 0;
617                         }
618                         dev->stats.rx_bytes += len;
619 
620                         skb_reserve(skb, 2);    /* 16 byte align */
621                         skb_put(skb, len);      /* make room */
622 
623                         cp_from_buf(lp->type, skb->data,
624                                     lp->rx_buf_ptr_cpu[entry], len);
625 
626                         skb->protocol = eth_type_trans(skb, dev);
627                         netif_rx(skb);
628                         dev->stats.rx_packets++;
629                 }
630 
631                 /* Return the packet to the pool */
632                 *rds_ptr(rd, mblength, lp->type) = 0;
633                 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
634                 *rds_ptr(rd, rmd1, lp->type) =
635                         ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
636                 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
637         }
638         return 0;
639 }
640 
641 static void lance_tx(struct net_device *dev)
642 {
643         struct lance_private *lp = netdev_priv(dev);
644         volatile u16 *ib = (volatile u16 *)dev->mem_start;
645         volatile struct lance_regs *ll = lp->ll;
646         volatile u16 *td;
647         int i, j;
648         int status;
649 
650         j = lp->tx_old;
651 
652         spin_lock(&lp->lock);
653 
654         for (i = j; i != lp->tx_new; i = j) {
655                 td = lib_ptr(ib, btx_ring[i], lp->type);
656                 /* If we hit a packet not owned by us, stop */
657                 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
658                         break;
659 
660                 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
661                         status = *tds_ptr(td, misc, lp->type);
662 
663                         dev->stats.tx_errors++;
664                         if (status & LE_T3_RTY)
665                                 dev->stats.tx_aborted_errors++;
666                         if (status & LE_T3_LCOL)
667                                 dev->stats.tx_window_errors++;
668 
669                         if (status & LE_T3_CLOS) {
670                                 dev->stats.tx_carrier_errors++;
671                                 printk("%s: Carrier Lost\n", dev->name);
672                                 /* Stop the lance */
673                                 writereg(&ll->rap, LE_CSR0);
674                                 writereg(&ll->rdp, LE_C0_STOP);
675                                 lance_init_ring(dev);
676                                 load_csrs(lp);
677                                 init_restart_lance(lp);
678                                 goto out;
679                         }
680                         /* Buffer errors and underflows turn off the
681                          * transmitter, restart the adapter.
682                          */
683                         if (status & (LE_T3_BUF | LE_T3_UFL)) {
684                                 dev->stats.tx_fifo_errors++;
685 
686                                 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
687                                        dev->name);
688                                 /* Stop the lance */
689                                 writereg(&ll->rap, LE_CSR0);
690                                 writereg(&ll->rdp, LE_C0_STOP);
691                                 lance_init_ring(dev);
692                                 load_csrs(lp);
693                                 init_restart_lance(lp);
694                                 goto out;
695                         }
696                 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
697                            LE_T1_POK) {
698                         /*
699                          * So we don't count the packet more than once.
700                          */
701                         *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
702 
703                         /* One collision before packet was sent. */
704                         if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
705                                 dev->stats.collisions++;
706 
707                         /* More than one collision, be optimistic. */
708                         if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
709                                 dev->stats.collisions += 2;
710 
711                         dev->stats.tx_packets++;
712                 }
713                 j = (j + 1) & TX_RING_MOD_MASK;
714         }
715         lp->tx_old = j;
716 out:
717         if (netif_queue_stopped(dev) &&
718             TX_BUFFS_AVAIL > 0)
719                 netif_wake_queue(dev);
720 
721         spin_unlock(&lp->lock);
722 }
723 
724 static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
725 {
726         struct net_device *dev = dev_id;
727 
728         printk(KERN_ERR "%s: DMA error\n", dev->name);
729         return IRQ_HANDLED;
730 }
731 
732 static irqreturn_t lance_interrupt(int irq, void *dev_id)
733 {
734         struct net_device *dev = dev_id;
735         struct lance_private *lp = netdev_priv(dev);
736         volatile struct lance_regs *ll = lp->ll;
737         int csr0;
738 
739         writereg(&ll->rap, LE_CSR0);
740         csr0 = ll->rdp;
741 
742         /* Acknowledge all the interrupt sources ASAP */
743         writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
744 
745         if ((csr0 & LE_C0_ERR)) {
746                 /* Clear the error condition */
747                 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
748                          LE_C0_CERR | LE_C0_MERR);
749         }
750         if (csr0 & LE_C0_RINT)
751                 lance_rx(dev);
752 
753         if (csr0 & LE_C0_TINT)
754                 lance_tx(dev);
755 
756         if (csr0 & LE_C0_BABL)
757                 dev->stats.tx_errors++;
758 
759         if (csr0 & LE_C0_MISS)
760                 dev->stats.rx_errors++;
761 
762         if (csr0 & LE_C0_MERR) {
763                 printk("%s: Memory error, status %04x\n", dev->name, csr0);
764 
765                 writereg(&ll->rdp, LE_C0_STOP);
766 
767                 lance_init_ring(dev);
768                 load_csrs(lp);
769                 init_restart_lance(lp);
770                 netif_wake_queue(dev);
771         }
772 
773         writereg(&ll->rdp, LE_C0_INEA);
774         writereg(&ll->rdp, LE_C0_INEA);
775         return IRQ_HANDLED;
776 }
777 
778 static int lance_open(struct net_device *dev)
779 {
780         volatile u16 *ib = (volatile u16 *)dev->mem_start;
781         struct lance_private *lp = netdev_priv(dev);
782         volatile struct lance_regs *ll = lp->ll;
783         int status = 0;
784 
785         /* Stop the Lance */
786         writereg(&ll->rap, LE_CSR0);
787         writereg(&ll->rdp, LE_C0_STOP);
788 
789         /* Set mode and clear multicast filter only at device open,
790          * so that lance_init_ring() called at any error will not
791          * forget multicast filters.
792          *
793          * BTW it is common bug in all lance drivers! --ANK
794          */
795         *lib_ptr(ib, mode, lp->type) = 0;
796         *lib_ptr(ib, filter[0], lp->type) = 0;
797         *lib_ptr(ib, filter[1], lp->type) = 0;
798         *lib_ptr(ib, filter[2], lp->type) = 0;
799         *lib_ptr(ib, filter[3], lp->type) = 0;
800 
801         lance_init_ring(dev);
802         load_csrs(lp);
803 
804         netif_start_queue(dev);
805 
806         /* Associate IRQ with lance_interrupt */
807         if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
808                 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
809                 return -EAGAIN;
810         }
811         if (lp->dma_irq >= 0) {
812                 unsigned long flags;
813 
814                 if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
815                                 "lance error", dev)) {
816                         free_irq(dev->irq, dev);
817                         printk("%s: Can't get DMA IRQ %d\n", dev->name,
818                                 lp->dma_irq);
819                         return -EAGAIN;
820                 }
821 
822                 spin_lock_irqsave(&ioasic_ssr_lock, flags);
823 
824                 fast_mb();
825                 /* Enable I/O ASIC LANCE DMA.  */
826                 ioasic_write(IO_REG_SSR,
827                              ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
828 
829                 fast_mb();
830                 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
831         }
832 
833         status = init_restart_lance(lp);
834         return status;
835 }
836 
837 static int lance_close(struct net_device *dev)
838 {
839         struct lance_private *lp = netdev_priv(dev);
840         volatile struct lance_regs *ll = lp->ll;
841 
842         netif_stop_queue(dev);
843         del_timer_sync(&lp->multicast_timer);
844 
845         /* Stop the card */
846         writereg(&ll->rap, LE_CSR0);
847         writereg(&ll->rdp, LE_C0_STOP);
848 
849         if (lp->dma_irq >= 0) {
850                 unsigned long flags;
851 
852                 spin_lock_irqsave(&ioasic_ssr_lock, flags);
853 
854                 fast_mb();
855                 /* Disable I/O ASIC LANCE DMA.  */
856                 ioasic_write(IO_REG_SSR,
857                              ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
858 
859                 fast_iob();
860                 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
861 
862                 free_irq(lp->dma_irq, dev);
863         }
864         free_irq(dev->irq, dev);
865         return 0;
866 }
867 
868 static inline int lance_reset(struct net_device *dev)
869 {
870         struct lance_private *lp = netdev_priv(dev);
871         volatile struct lance_regs *ll = lp->ll;
872         int status;
873 
874         /* Stop the lance */
875         writereg(&ll->rap, LE_CSR0);
876         writereg(&ll->rdp, LE_C0_STOP);
877 
878         lance_init_ring(dev);
879         load_csrs(lp);
880         dev->trans_start = jiffies; /* prevent tx timeout */
881         status = init_restart_lance(lp);
882         return status;
883 }
884 
885 static void lance_tx_timeout(struct net_device *dev)
886 {
887         struct lance_private *lp = netdev_priv(dev);
888         volatile struct lance_regs *ll = lp->ll;
889 
890         printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
891                 dev->name, ll->rdp);
892         lance_reset(dev);
893         netif_wake_queue(dev);
894 }
895 
896 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
897 {
898         struct lance_private *lp = netdev_priv(dev);
899         volatile struct lance_regs *ll = lp->ll;
900         volatile u16 *ib = (volatile u16 *)dev->mem_start;
901         unsigned long flags;
902         int entry, len;
903 
904         len = skb->len;
905 
906         if (len < ETH_ZLEN) {
907                 if (skb_padto(skb, ETH_ZLEN))
908                         return NETDEV_TX_OK;
909                 len = ETH_ZLEN;
910         }
911 
912         dev->stats.tx_bytes += len;
913 
914         spin_lock_irqsave(&lp->lock, flags);
915 
916         entry = lp->tx_new;
917         *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
918         *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
919 
920         cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
921 
922         /* Now, give the packet to the lance */
923         *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
924                 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
925                 (LE_T1_POK | LE_T1_OWN);
926         lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
927 
928         if (TX_BUFFS_AVAIL <= 0)
929                 netif_stop_queue(dev);
930 
931         /* Kick the lance: transmit now */
932         writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
933 
934         spin_unlock_irqrestore(&lp->lock, flags);
935 
936         dev_kfree_skb(skb);
937 
938         return NETDEV_TX_OK;
939 }
940 
941 static void lance_load_multicast(struct net_device *dev)
942 {
943         struct lance_private *lp = netdev_priv(dev);
944         volatile u16 *ib = (volatile u16 *)dev->mem_start;
945         struct netdev_hw_addr *ha;
946         u32 crc;
947 
948         /* set all multicast bits */
949         if (dev->flags & IFF_ALLMULTI) {
950                 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
951                 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
952                 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
953                 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
954                 return;
955         }
956         /* clear the multicast filter */
957         *lib_ptr(ib, filter[0], lp->type) = 0;
958         *lib_ptr(ib, filter[1], lp->type) = 0;
959         *lib_ptr(ib, filter[2], lp->type) = 0;
960         *lib_ptr(ib, filter[3], lp->type) = 0;
961 
962         /* Add addresses */
963         netdev_for_each_mc_addr(ha, dev) {
964                 crc = ether_crc_le(ETH_ALEN, ha->addr);
965                 crc = crc >> 26;
966                 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
967         }
968 }
969 
970 static void lance_set_multicast(struct net_device *dev)
971 {
972         struct lance_private *lp = netdev_priv(dev);
973         volatile u16 *ib = (volatile u16 *)dev->mem_start;
974         volatile struct lance_regs *ll = lp->ll;
975 
976         if (!netif_running(dev))
977                 return;
978 
979         if (lp->tx_old != lp->tx_new) {
980                 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
981                 netif_wake_queue(dev);
982                 return;
983         }
984 
985         netif_stop_queue(dev);
986 
987         writereg(&ll->rap, LE_CSR0);
988         writereg(&ll->rdp, LE_C0_STOP);
989 
990         lance_init_ring(dev);
991 
992         if (dev->flags & IFF_PROMISC) {
993                 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
994         } else {
995                 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
996                 lance_load_multicast(dev);
997         }
998         load_csrs(lp);
999         init_restart_lance(lp);
1000         netif_wake_queue(dev);
1001 }
1002 
1003 static void lance_set_multicast_retry(unsigned long _opaque)
1004 {
1005         struct net_device *dev = (struct net_device *) _opaque;
1006 
1007         lance_set_multicast(dev);
1008 }
1009 
1010 static const struct net_device_ops lance_netdev_ops = {
1011         .ndo_open               = lance_open,
1012         .ndo_stop               = lance_close,
1013         .ndo_start_xmit         = lance_start_xmit,
1014         .ndo_tx_timeout         = lance_tx_timeout,
1015         .ndo_set_rx_mode        = lance_set_multicast,
1016         .ndo_change_mtu         = eth_change_mtu,
1017         .ndo_validate_addr      = eth_validate_addr,
1018         .ndo_set_mac_address    = eth_mac_addr,
1019 };
1020 
1021 static int dec_lance_probe(struct device *bdev, const int type)
1022 {
1023         static unsigned version_printed;
1024         static const char fmt[] = "declance%d";
1025         char name[10];
1026         struct net_device *dev;
1027         struct lance_private *lp;
1028         volatile struct lance_regs *ll;
1029         resource_size_t start = 0, len = 0;
1030         int i, ret;
1031         unsigned long esar_base;
1032         unsigned char *esar;
1033 
1034         if (dec_lance_debug && version_printed++ == 0)
1035                 printk(version);
1036 
1037         if (bdev)
1038                 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1039         else {
1040                 i = 0;
1041                 dev = root_lance_dev;
1042                 while (dev) {
1043                         i++;
1044                         lp = netdev_priv(dev);
1045                         dev = lp->next;
1046                 }
1047                 snprintf(name, sizeof(name), fmt, i);
1048         }
1049 
1050         dev = alloc_etherdev(sizeof(struct lance_private));
1051         if (!dev) {
1052                 ret = -ENOMEM;
1053                 goto err_out;
1054         }
1055 
1056         /*
1057          * alloc_etherdev ensures the data structures used by the LANCE
1058          * are aligned.
1059          */
1060         lp = netdev_priv(dev);
1061         spin_lock_init(&lp->lock);
1062 
1063         lp->type = type;
1064         switch (type) {
1065         case ASIC_LANCE:
1066                 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1067 
1068                 /* buffer space for the on-board LANCE shared memory */
1069                 /*
1070                  * FIXME: ugly hack!
1071                  */
1072                 dev->mem_start = CKSEG1ADDR(0x00020000);
1073                 dev->mem_end = dev->mem_start + 0x00020000;
1074                 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1075                 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1076 
1077                 /* Workaround crash with booting KN04 2.1k from Disk */
1078                 memset((void *)dev->mem_start, 0,
1079                        dev->mem_end - dev->mem_start);
1080 
1081                 /*
1082                  * setup the pointer arrays, this sucks [tm] :-(
1083                  */
1084                 for (i = 0; i < RX_RING_SIZE; i++) {
1085                         lp->rx_buf_ptr_cpu[i] =
1086                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1087                                          2 * i * RX_BUFF_SIZE);
1088                         lp->rx_buf_ptr_lnc[i] =
1089                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1090                 }
1091                 for (i = 0; i < TX_RING_SIZE; i++) {
1092                         lp->tx_buf_ptr_cpu[i] =
1093                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1094                                          2 * RX_RING_SIZE * RX_BUFF_SIZE +
1095                                          2 * i * TX_BUFF_SIZE);
1096                         lp->tx_buf_ptr_lnc[i] =
1097                                 (BUF_OFFSET_LNC +
1098                                  RX_RING_SIZE * RX_BUFF_SIZE +
1099                                  i * TX_BUFF_SIZE);
1100                 }
1101 
1102                 /* Setup I/O ASIC LANCE DMA.  */
1103                 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1104                 ioasic_write(IO_REG_LANCE_DMA_P,
1105                              CPHYSADDR(dev->mem_start) << 3);
1106 
1107                 break;
1108 #ifdef CONFIG_TC
1109         case PMAD_LANCE:
1110                 dev_set_drvdata(bdev, dev);
1111 
1112                 start = to_tc_dev(bdev)->resource.start;
1113                 len = to_tc_dev(bdev)->resource.end - start + 1;
1114                 if (!request_mem_region(start, len, dev_name(bdev))) {
1115                         printk(KERN_ERR
1116                                "%s: Unable to reserve MMIO resource\n",
1117                                dev_name(bdev));
1118                         ret = -EBUSY;
1119                         goto err_out_dev;
1120                 }
1121 
1122                 dev->mem_start = CKSEG1ADDR(start);
1123                 dev->mem_end = dev->mem_start + 0x100000;
1124                 dev->base_addr = dev->mem_start + 0x100000;
1125                 dev->irq = to_tc_dev(bdev)->interrupt;
1126                 esar_base = dev->mem_start + 0x1c0002;
1127                 lp->dma_irq = -1;
1128 
1129                 for (i = 0; i < RX_RING_SIZE; i++) {
1130                         lp->rx_buf_ptr_cpu[i] =
1131                                 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1132                                          i * RX_BUFF_SIZE);
1133                         lp->rx_buf_ptr_lnc[i] =
1134                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1135                 }
1136                 for (i = 0; i < TX_RING_SIZE; i++) {
1137                         lp->tx_buf_ptr_cpu[i] =
1138                                 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1139                                          RX_RING_SIZE * RX_BUFF_SIZE +
1140                                          i * TX_BUFF_SIZE);
1141                         lp->tx_buf_ptr_lnc[i] =
1142                                 (BUF_OFFSET_LNC +
1143                                  RX_RING_SIZE * RX_BUFF_SIZE +
1144                                  i * TX_BUFF_SIZE);
1145                 }
1146 
1147                 break;
1148 #endif
1149         case PMAX_LANCE:
1150                 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1151                 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1152                 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1153                 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1154                 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1155                 lp->dma_irq = -1;
1156 
1157                 /*
1158                  * setup the pointer arrays, this sucks [tm] :-(
1159                  */
1160                 for (i = 0; i < RX_RING_SIZE; i++) {
1161                         lp->rx_buf_ptr_cpu[i] =
1162                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1163                                          2 * i * RX_BUFF_SIZE);
1164                         lp->rx_buf_ptr_lnc[i] =
1165                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1166                 }
1167                 for (i = 0; i < TX_RING_SIZE; i++) {
1168                         lp->tx_buf_ptr_cpu[i] =
1169                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1170                                          2 * RX_RING_SIZE * RX_BUFF_SIZE +
1171                                          2 * i * TX_BUFF_SIZE);
1172                         lp->tx_buf_ptr_lnc[i] =
1173                                 (BUF_OFFSET_LNC +
1174                                  RX_RING_SIZE * RX_BUFF_SIZE +
1175                                  i * TX_BUFF_SIZE);
1176                 }
1177 
1178                 break;
1179 
1180         default:
1181                 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1182                         name);
1183                 ret = -ENODEV;
1184                 goto err_out_dev;
1185         }
1186 
1187         ll = (struct lance_regs *) dev->base_addr;
1188         esar = (unsigned char *) esar_base;
1189 
1190         /* prom checks */
1191         /* First, check for test pattern */
1192         if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1193             esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1194                 printk(KERN_ERR
1195                         "%s: Ethernet station address prom not found!\n",
1196                         name);
1197                 ret = -ENODEV;
1198                 goto err_out_resource;
1199         }
1200         /* Check the prom contents */
1201         for (i = 0; i < 8; i++) {
1202                 if (esar[i * 4] != esar[0x3c - i * 4] &&
1203                     esar[i * 4] != esar[0x40 + i * 4] &&
1204                     esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1205                         printk(KERN_ERR "%s: Something is wrong with the "
1206                                 "ethernet station address prom!\n", name);
1207                         ret = -ENODEV;
1208                         goto err_out_resource;
1209                 }
1210         }
1211 
1212         /* Copy the ethernet address to the device structure, later to the
1213          * lance initialization block so the lance gets it every time it's
1214          * (re)initialized.
1215          */
1216         switch (type) {
1217         case ASIC_LANCE:
1218                 printk("%s: IOASIC onboard LANCE", name);
1219                 break;
1220         case PMAD_LANCE:
1221                 printk("%s: PMAD-AA", name);
1222                 break;
1223         case PMAX_LANCE:
1224                 printk("%s: PMAX onboard LANCE", name);
1225                 break;
1226         }
1227         for (i = 0; i < 6; i++)
1228                 dev->dev_addr[i] = esar[i * 4];
1229 
1230         printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
1231 
1232         dev->netdev_ops = &lance_netdev_ops;
1233         dev->watchdog_timeo = 5*HZ;
1234 
1235         /* lp->ll is the location of the registers for lance card */
1236         lp->ll = ll;
1237 
1238         /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1239          * specification.
1240          */
1241         lp->busmaster_regval = 0;
1242 
1243         dev->dma = 0;
1244 
1245         /* We cannot sleep if the chip is busy during a
1246          * multicast list update event, because such events
1247          * can occur from interrupts (ex. IPv6).  So we
1248          * use a timer to try again later when necessary. -DaveM
1249          */
1250         init_timer(&lp->multicast_timer);
1251         lp->multicast_timer.data = (unsigned long) dev;
1252         lp->multicast_timer.function = lance_set_multicast_retry;
1253 
1254         ret = register_netdev(dev);
1255         if (ret) {
1256                 printk(KERN_ERR
1257                         "%s: Unable to register netdev, aborting.\n", name);
1258                 goto err_out_resource;
1259         }
1260 
1261         if (!bdev) {
1262                 lp->next = root_lance_dev;
1263                 root_lance_dev = dev;
1264         }
1265 
1266         printk("%s: registered as %s.\n", name, dev->name);
1267         return 0;
1268 
1269 err_out_resource:
1270         if (bdev)
1271                 release_mem_region(start, len);
1272 
1273 err_out_dev:
1274         free_netdev(dev);
1275 
1276 err_out:
1277         return ret;
1278 }
1279 
1280 static void __exit dec_lance_remove(struct device *bdev)
1281 {
1282         struct net_device *dev = dev_get_drvdata(bdev);
1283         resource_size_t start, len;
1284 
1285         unregister_netdev(dev);
1286         start = to_tc_dev(bdev)->resource.start;
1287         len = to_tc_dev(bdev)->resource.end - start + 1;
1288         release_mem_region(start, len);
1289         free_netdev(dev);
1290 }
1291 
1292 /* Find all the lance cards on the system and initialize them */
1293 static int __init dec_lance_platform_probe(void)
1294 {
1295         int count = 0;
1296 
1297         if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1298                 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1299                         if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1300                                 count++;
1301                 } else if (!TURBOCHANNEL) {
1302                         if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1303                                 count++;
1304                 }
1305         }
1306 
1307         return (count > 0) ? 0 : -ENODEV;
1308 }
1309 
1310 static void __exit dec_lance_platform_remove(void)
1311 {
1312         while (root_lance_dev) {
1313                 struct net_device *dev = root_lance_dev;
1314                 struct lance_private *lp = netdev_priv(dev);
1315 
1316                 unregister_netdev(dev);
1317                 root_lance_dev = lp->next;
1318                 free_netdev(dev);
1319         }
1320 }
1321 
1322 #ifdef CONFIG_TC
1323 static int dec_lance_tc_probe(struct device *dev);
1324 static int __exit dec_lance_tc_remove(struct device *dev);
1325 
1326 static const struct tc_device_id dec_lance_tc_table[] = {
1327         { "DEC     ", "PMAD-AA " },
1328         { }
1329 };
1330 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1331 
1332 static struct tc_driver dec_lance_tc_driver = {
1333         .id_table       = dec_lance_tc_table,
1334         .driver         = {
1335                 .name   = "declance",
1336                 .bus    = &tc_bus_type,
1337                 .probe  = dec_lance_tc_probe,
1338                 .remove = __exit_p(dec_lance_tc_remove),
1339         },
1340 };
1341 
1342 static int dec_lance_tc_probe(struct device *dev)
1343 {
1344         int status = dec_lance_probe(dev, PMAD_LANCE);
1345         if (!status)
1346                 get_device(dev);
1347         return status;
1348 }
1349 
1350 static int __exit dec_lance_tc_remove(struct device *dev)
1351 {
1352         put_device(dev);
1353         dec_lance_remove(dev);
1354         return 0;
1355 }
1356 #endif
1357 
1358 static int __init dec_lance_init(void)
1359 {
1360         int status;
1361 
1362         status = tc_register_driver(&dec_lance_tc_driver);
1363         if (!status)
1364                 dec_lance_platform_probe();
1365         return status;
1366 }
1367 
1368 static void __exit dec_lance_exit(void)
1369 {
1370         dec_lance_platform_remove();
1371         tc_unregister_driver(&dec_lance_tc_driver);
1372 }
1373 
1374 
1375 module_init(dec_lance_init);
1376 module_exit(dec_lance_exit);
1377 

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