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

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

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