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1da177e4
LT		 1/* 82596.c: A generic 82596 ethernet driver for linux. */
2/*
3 Based on Apricot.c
4 Written 1994 by Mark Evans.
5 This driver is for the Apricot 82596 bus-master interface
6
7 Modularised 12/94 Mark Evans
8
9
10 Modified to support the 82596 ethernet chips on 680x0 VME boards.
11 by Richard Hirst <richard@sleepie.demon.co.uk>
12 Renamed to be 82596.c
13
14 980825: Changed to receive directly in to sk_buffs which are
15 allocated at open() time. Eliminates copy on incoming frames
16 (small ones are still copied). Shared data now held in a
17 non-cached page, so we can run on 68060 in copyback mode.
18
19 TBD:
20 * look at deferring rx frames rather than discarding (as per tulip)
21 * handle tx ring full as per tulip
22 * performace test to tune rx_copybreak
23
24 Most of my modifications relate to the braindead big-endian
25 implementation by Intel. When the i596 is operating in
26 'big-endian' mode, it thinks a 32 bit value of 0x12345678
27 should be stored as 0x56781234. This is a real pain, when
28 you have linked lists which are shared by the 680x0 and the
29 i596.
30
31 Driver skeleton
32 Written 1993 by Donald Becker.
33 Copyright 1993 United States Government as represented by the Director,
34 National Security Agency. This software may only be used and distributed
35 according to the terms of the GNU General Public License as modified by SRC,
36 incorporated herein by reference.
37
38 The author may be reached as becker@scyld.com, or C/O
39 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
40
41 */
42
1da177e4
LT		 43#include <linux/module.h>
44#include <linux/kernel.h>
45#include <linux/string.h>
46#include <linux/errno.h>
47#include <linux/ioport.h>
48#include <linux/slab.h>
49#include <linux/interrupt.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/etherdevice.h>
53#include <linux/skbuff.h>
54#include <linux/init.h>
55#include <linux/bitops.h>
56
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/pgtable.h>
88accb49 60#include <asm/cacheflush.h>
1da177e4
LT		 61
62static char version[] __initdata =
63 "82596.c $Revision: 1.5 $\n";
64
65#define DRV_NAME "82596"
66
67/* DEBUG flags
68 */
69
70#define DEB_INIT 0x0001
71#define DEB_PROBE 0x0002
72#define DEB_SERIOUS 0x0004
73#define DEB_ERRORS 0x0008
74#define DEB_MULTI 0x0010
75#define DEB_TDR 0x0020
76#define DEB_OPEN 0x0040
77#define DEB_RESET 0x0080
78#define DEB_ADDCMD 0x0100
79#define DEB_STATUS 0x0200
80#define DEB_STARTTX 0x0400
81#define DEB_RXADDR 0x0800
82#define DEB_TXADDR 0x1000
83#define DEB_RXFRAME 0x2000
84#define DEB_INTS 0x4000
85#define DEB_STRUCT 0x8000
86#define DEB_ANY 0xffff
87
88
89#define DEB(x,y) if (i596_debug & (x)) y
90
91
92#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
93#define ENABLE_MVME16x_NET
94#endif
95#if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
96#define ENABLE_BVME6000_NET
97#endif
98#if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
99#define ENABLE_APRICOT
100#endif
101
102#ifdef ENABLE_MVME16x_NET
103#include <asm/mvme16xhw.h>
104#endif
105#ifdef ENABLE_BVME6000_NET
106#include <asm/bvme6000hw.h>
107#endif
108
109/*
110 * Define various macros for Channel Attention, word swapping etc., dependent
111 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
112 */
113
114#ifdef __mc68000__
115#define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116#define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
117#define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
118#define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119#define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
120#define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
121#define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
122#define ISCP_BUSY 0x00010000
123#define MACH_IS_APRICOT 0
124#else
125#define WSWAPrfd(x) ((struct i596_rfd *)(x))
126#define WSWAPrbd(x) ((struct i596_rbd *)(x))
127#define WSWAPiscp(x) ((struct i596_iscp *)(x))
128#define WSWAPscb(x) ((struct i596_scb *)(x))
129#define WSWAPcmd(x) ((struct i596_cmd *)(x))
130#define WSWAPtbd(x) ((struct i596_tbd *)(x))
131#define WSWAPchar(x) ((char *)(x))
132#define ISCP_BUSY 0x0001
133#define MACH_IS_APRICOT 1
134#endif
135
136/*
137 * The MPU_PORT command allows direct access to the 82596. With PORT access
138 * the following commands are available (p5-18). The 32-bit port command
139 * must be word-swapped with the most significant word written first.
140 * This only applies to VME boards.
141 */
142#define PORT_RESET 0x00 /* reset 82596 */
143#define PORT_SELFTEST 0x01 /* selftest */
144#define PORT_ALTSCP 0x02 /* alternate SCB address */
145#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
146
147static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
148
149MODULE_AUTHOR("Richard Hirst");
150MODULE_DESCRIPTION("i82596 driver");
151MODULE_LICENSE("GPL");
152
153module_param(i596_debug, int, 0);
154MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
155
156
157/* Copy frames shorter than rx_copybreak, otherwise pass on up in
158 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
159 */
160static int rx_copybreak = 100;
161
162#define PKT_BUF_SZ 1536
163#define MAX_MC_CNT 64
164
165#define I596_TOTAL_SIZE 17
166
167#define I596_NULL ((void *)0xffffffff)
168
169#define CMD_EOL 0x8000 /* The last command of the list, stop. */
170#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
171#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
172
173#define CMD_FLEX 0x0008 /* Enable flexible memory model */
174
175enum commands {
176 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
177 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
178};
179
180#define STAT_C 0x8000 /* Set to 0 after execution */
181#define STAT_B 0x4000 /* Command being executed */
182#define STAT_OK 0x2000 /* Command executed ok */
183#define STAT_A 0x1000 /* Command aborted */
184
185#define CUC_START 0x0100
186#define CUC_RESUME 0x0200
187#define CUC_SUSPEND 0x0300
188#define CUC_ABORT 0x0400
189#define RX_START 0x0010
190#define RX_RESUME 0x0020
191#define RX_SUSPEND 0x0030
192#define RX_ABORT 0x0040
193
194#define TX_TIMEOUT 5
195
196
197struct i596_reg {
198 unsigned short porthi;
199 unsigned short portlo;
200 unsigned long ca;
201};
202
203#define EOF 0x8000
204#define SIZE_MASK 0x3fff
205
206struct i596_tbd {
207 unsigned short size;
208 unsigned short pad;
209 struct i596_tbd *next;
210 char *data;
211};
212
213/* The command structure has two 'next' pointers; v_next is the address of
214 * the next command as seen by the CPU, b_next is the address of the next
215 * command as seen by the 82596. The b_next pointer, as used by the 82596
216 * always references the status field of the next command, rather than the
217 * v_next field, because the 82596 is unaware of v_next. It may seem more
218 * logical to put v_next at the end of the structure, but we cannot do that
219 * because the 82596 expects other fields to be there, depending on command
220 * type.
221 */
222
223struct i596_cmd {
224 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
225 unsigned short status;
226 unsigned short command;
227 struct i596_cmd *b_next; /* Address from i596 viewpoint */
228};
229
230struct tx_cmd {
231 struct i596_cmd cmd;
232 struct i596_tbd *tbd;
233 unsigned short size;
234 unsigned short pad;
235 struct sk_buff *skb; /* So we can free it after tx */
236};
237
238struct tdr_cmd {
239 struct i596_cmd cmd;
240 unsigned short status;
241 unsigned short pad;
242};
243
244struct mc_cmd {
245 struct i596_cmd cmd;
246 short mc_cnt;
247 char mc_addrs[MAX_MC_CNT*6];
248};
249
250struct sa_cmd {
251 struct i596_cmd cmd;
252 char eth_addr[8];
253};
254
255struct cf_cmd {
256 struct i596_cmd cmd;
257 char i596_config[16];
258};
259
260struct i596_rfd {
261 unsigned short stat;
262 unsigned short cmd;
263 struct i596_rfd *b_next; /* Address from i596 viewpoint */
264 struct i596_rbd *rbd;
265 unsigned short count;
266 unsigned short size;
267 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
268 struct i596_rfd *v_prev;
269};
270
271struct i596_rbd {
272 unsigned short count;
273 unsigned short zero1;
274 struct i596_rbd *b_next;
275 unsigned char *b_data; /* Address from i596 viewpoint */
276 unsigned short size;
277 unsigned short zero2;
278 struct sk_buff *skb;
279 struct i596_rbd *v_next;
280 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
281 unsigned char *v_data; /* Address from CPUs viewpoint */
282};
283
284#define TX_RING_SIZE 64
285#define RX_RING_SIZE 16
286
287struct i596_scb {
288 unsigned short status;
289 unsigned short command;
290 struct i596_cmd *cmd;
291 struct i596_rfd *rfd;
292 unsigned long crc_err;
293 unsigned long align_err;
294 unsigned long resource_err;
295 unsigned long over_err;
296 unsigned long rcvdt_err;
297 unsigned long short_err;
298 unsigned short t_on;
299 unsigned short t_off;
300};
301
302struct i596_iscp {
303 unsigned long stat;
304 struct i596_scb *scb;
305};
306
307struct i596_scp {
308 unsigned long sysbus;
309 unsigned long pad;
310 struct i596_iscp *iscp;
311};
312
313struct i596_private {
314 volatile struct i596_scp scp;
315 volatile struct i596_iscp iscp;
316 volatile struct i596_scb scb;
317 struct sa_cmd sa_cmd;
318 struct cf_cmd cf_cmd;
319 struct tdr_cmd tdr_cmd;
320 struct mc_cmd mc_cmd;
321 unsigned long stat;
322 int last_restart __attribute__((aligned(4)));
323 struct i596_rfd *rfd_head;
324 struct i596_rbd *rbd_head;
325 struct i596_cmd *cmd_tail;
326 struct i596_cmd *cmd_head;
327 int cmd_backlog;
328 unsigned long last_cmd;
329 struct net_device_stats stats;
330 struct i596_rfd rfds[RX_RING_SIZE];
331 struct i596_rbd rbds[RX_RING_SIZE];
332 struct tx_cmd tx_cmds[TX_RING_SIZE];
333 struct i596_tbd tbds[TX_RING_SIZE];
334 int next_tx_cmd;
335 spinlock_t lock;
336};
337
338static char init_setup[] =
339{
340 0x8E, /* length, prefetch on */
341 0xC8, /* fifo to 8, monitor off */
342#ifdef CONFIG_VME
343 0xc0, /* don't save bad frames */
344#else
345 0x80, /* don't save bad frames */
346#endif
347 0x2E, /* No source address insertion, 8 byte preamble */
348 0x00, /* priority and backoff defaults */
349 0x60, /* interframe spacing */
350 0x00, /* slot time LSB */
351 0xf2, /* slot time and retries */
352 0x00, /* promiscuous mode */
353 0x00, /* collision detect */
354 0x40, /* minimum frame length */
355 0xff,
356 0x00,
357 0x7f /* *multi IA */ };
358
359static int i596_open(struct net_device *dev);
360static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
7d12e780 361static irqreturn_t i596_interrupt(int irq, void *dev_id);
1da177e4
LT		 362static int i596_close(struct net_device *dev);
363static struct net_device_stats *i596_get_stats(struct net_device *dev);
364static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
365static void i596_tx_timeout (struct net_device *dev);
366static void print_eth(unsigned char *buf, char *str);
367static void set_multicast_list(struct net_device *dev);
368
369static int rx_ring_size = RX_RING_SIZE;
370static int ticks_limit = 25;
371static int max_cmd_backlog = TX_RING_SIZE-1;
372
373
374static inline void CA(struct net_device *dev)
375{
376#ifdef ENABLE_MVME16x_NET
377 if (MACH_IS_MVME16x) {
378 ((struct i596_reg *) dev->base_addr)->ca = 1;
379 }
380#endif
381#ifdef ENABLE_BVME6000_NET
382 if (MACH_IS_BVME6000) {
383 volatile u32 i;
384
385 i = *(volatile u32 *) (dev->base_addr);
386 }
387#endif
388#ifdef ENABLE_APRICOT
389 if (MACH_IS_APRICOT) {
390 outw(0, (short) (dev->base_addr) + 4);
391 }
392#endif
393}
394
395
396static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
397{
398#ifdef ENABLE_MVME16x_NET
399 if (MACH_IS_MVME16x) {
400 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
401 p->porthi = ((c) | (u32) (x)) & 0xffff;
402 p->portlo = ((c) | (u32) (x)) >> 16;
403 }
404#endif
405#ifdef ENABLE_BVME6000_NET
406 if (MACH_IS_BVME6000) {
407 u32 v = (u32) (c) | (u32) (x);
408 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
409 *(volatile u32 *) dev->base_addr = v;
410 udelay(1);
411 *(volatile u32 *) dev->base_addr = v;
412 }
413#endif
414}
415
416
417static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
418{
419 while (--delcnt && lp->iscp.stat)
420 udelay(10);
421 if (!delcnt) {
422 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
423 dev->name, str, lp->scb.status, lp->scb.command);
424 return -1;
425 }
426 else
427 return 0;
428}
429
430
431static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
432{
433 while (--delcnt && lp->scb.command)
434 udelay(10);
435 if (!delcnt) {
436 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
437 dev->name, str, lp->scb.status, lp->scb.command);
438 return -1;
439 }
440 else
441 return 0;
442}
443
444
445static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
446{
447 volatile struct i596_cmd *c = cmd;
6aa20a22 448
1da177e4
LT		 449 while (--delcnt && c->command)
450 udelay(10);
451 if (!delcnt) {
452 printk(KERN_ERR "%s: %s.\n", dev->name, str);
453 return -1;
454 }
455 else
456 return 0;
457}
458
6aa20a22 459
1da177e4
LT		 460static void i596_display_data(struct net_device *dev)
461{
462 struct i596_private *lp = dev->priv;
463 struct i596_cmd *cmd;
464 struct i596_rfd *rfd;
465 struct i596_rbd *rbd;
466
467 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
468 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
469 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
470 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
471 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
472 " .cmd = %p, .rfd = %p\n",
473 &lp->scb, lp->scb.status, lp->scb.command,
474 lp->scb.cmd, lp->scb.rfd);
475 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
476 " over %lx, rcvdt %lx, short %lx\n",
477 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
478 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
479 cmd = lp->cmd_head;
480 while (cmd != I596_NULL) {
481 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
482 cmd, cmd->status, cmd->command, cmd->b_next);
483 cmd = cmd->v_next;
484 }
485 rfd = lp->rfd_head;
486 printk(KERN_ERR "rfd_head = %p\n", rfd);
487 do {
488 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
489 " count %04x\n",
490 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
491 rfd->count);
492 rfd = rfd->v_next;
493 } while (rfd != lp->rfd_head);
494 rbd = lp->rbd_head;
495 printk(KERN_ERR "rbd_head = %p\n", rbd);
496 do {
497 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
498 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
499 rbd = rbd->v_next;
500 } while (rbd != lp->rbd_head);
501}
502
503
504#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
7d12e780 505static irqreturn_t i596_error(int irq, void *dev_id)
1da177e4
LT		 506{
507 struct net_device *dev = dev_id;
508#ifdef ENABLE_MVME16x_NET
509 if (MACH_IS_MVME16x) {
510 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
511
512 pcc2[0x28] = 1;
513 pcc2[0x2b] = 0x1d;
514 }
515#endif
516#ifdef ENABLE_BVME6000_NET
517 if (MACH_IS_BVME6000) {
518 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
519
520 *ethirq = 1;
521 *ethirq = 3;
522 }
523#endif
524 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
525 i596_display_data(dev);
526 return IRQ_HANDLED;
527}
528#endif
529
530static inline void init_rx_bufs(struct net_device *dev)
531{
532 struct i596_private *lp = dev->priv;
533 int i;
534 struct i596_rfd *rfd;
535 struct i596_rbd *rbd;
536
537 /* First build the Receive Buffer Descriptor List */
538
539 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
540 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
541
542 if (skb == NULL)
543 panic("82596: alloc_skb() failed");
544 skb->dev = dev;
545 rbd->v_next = rbd+1;
546 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
547 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
548 rbd->skb = skb;
689be439
DM		 549 rbd->v_data = skb->data;
550 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
1da177e4
LT		 551 rbd->size = PKT_BUF_SZ;
552#ifdef __mc68000__
689be439 553 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
1da177e4
LT		 554#endif
555 }
556 lp->rbd_head = lp->rbds;
557 rbd = lp->rbds + rx_ring_size - 1;
558 rbd->v_next = lp->rbds;
559 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
560
561 /* Now build the Receive Frame Descriptor List */
562
563 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
564 rfd->rbd = I596_NULL;
565 rfd->v_next = rfd+1;
566 rfd->v_prev = rfd-1;
567 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
568 rfd->cmd = CMD_FLEX;
569 }
570 lp->rfd_head = lp->rfds;
571 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
572 rfd = lp->rfds;
573 rfd->rbd = lp->rbd_head;
574 rfd->v_prev = lp->rfds + rx_ring_size - 1;
575 rfd = lp->rfds + rx_ring_size - 1;
576 rfd->v_next = lp->rfds;
577 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
578 rfd->cmd = CMD_EOL|CMD_FLEX;
579}
580
581static inline void remove_rx_bufs(struct net_device *dev)
582{
583 struct i596_private *lp = dev->priv;
584 struct i596_rbd *rbd;
585 int i;
586
587 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
588 if (rbd->skb == NULL)
589 break;
590 dev_kfree_skb(rbd->skb);
591 }
592}
593
594
595static void rebuild_rx_bufs(struct net_device *dev)
596{
597 struct i596_private *lp = dev->priv;
598 int i;
599
600 /* Ensure rx frame/buffer descriptors are tidy */
601
602 for (i = 0; i < rx_ring_size; i++) {
603 lp->rfds[i].rbd = I596_NULL;
604 lp->rfds[i].cmd = CMD_FLEX;
605 }
606 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
607 lp->rfd_head = lp->rfds;
608 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
609 lp->rbd_head = lp->rbds;
610 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
611}
612
613
614static int init_i596_mem(struct net_device *dev)
615{
616 struct i596_private *lp = dev->priv;
0018dfa4 617#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
1da177e4
LT		 618 short ioaddr = dev->base_addr;
619#endif
620 unsigned long flags;
621
622 MPU_PORT(dev, PORT_RESET, NULL);
623
624 udelay(100); /* Wait 100us - seems to help */
625
626#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
627#ifdef ENABLE_MVME16x_NET
628 if (MACH_IS_MVME16x) {
629 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
630
631 /* Disable all ints for now */
632 pcc2[0x28] = 1;
633 pcc2[0x2a] = 0x48;
634 /* Following disables snooping. Snooping is not required
635 * as we make appropriate use of non-cached pages for
636 * shared data, and cache_push/cache_clear.
637 */
638 pcc2[0x2b] = 0x08;
639 }
640#endif
641#ifdef ENABLE_BVME6000_NET
642 if (MACH_IS_BVME6000) {
643 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
644
645 *ethirq = 1;
646 }
647#endif
648
649 /* change the scp address */
650
651 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
652
653#elif defined(ENABLE_APRICOT)
654
655 {
656 u32 scp = virt_to_bus(&lp->scp);
657
658 /* change the scp address */
659 outw(0, ioaddr);
660 outw(0, ioaddr);
661 outb(4, ioaddr + 0xf);
662 outw(scp | 2, ioaddr);
663 outw(scp >> 16, ioaddr);
664 }
665#endif
666
667 lp->last_cmd = jiffies;
668
669#ifdef ENABLE_MVME16x_NET
670 if (MACH_IS_MVME16x)
671 lp->scp.sysbus = 0x00000054;
672#endif
673#ifdef ENABLE_BVME6000_NET
674 if (MACH_IS_BVME6000)
675 lp->scp.sysbus = 0x0000004c;
676#endif
677#ifdef ENABLE_APRICOT
678 if (MACH_IS_APRICOT)
679 lp->scp.sysbus = 0x00440000;
680#endif
681
682 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
683 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
684 lp->iscp.stat = ISCP_BUSY;
685 lp->cmd_backlog = 0;
686
687 lp->cmd_head = lp->scb.cmd = I596_NULL;
688
689#ifdef ENABLE_BVME6000_NET
690 if (MACH_IS_BVME6000) {
691 lp->scb.t_on = 7 * 25;
692 lp->scb.t_off = 1 * 25;
693 }
694#endif
695
696 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
697
698#if defined(ENABLE_APRICOT)
699 (void) inb(ioaddr + 0x10);
700 outb(4, ioaddr + 0xf);
701#endif
702 CA(dev);
703
704 if (wait_istat(dev,lp,1000,"initialization timed out"))
705 goto failed;
706 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
707
708 /* Ensure rx frame/buffer descriptors are tidy */
709 rebuild_rx_bufs(dev);
710 lp->scb.command = 0;
711
712#ifdef ENABLE_MVME16x_NET
713 if (MACH_IS_MVME16x) {
714 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
715
716 /* Enable ints, etc. now */
717 pcc2[0x2a] = 0x55; /* Edge sensitive */
718 pcc2[0x2b] = 0x15;
719 }
720#endif
721#ifdef ENABLE_BVME6000_NET
722 if (MACH_IS_BVME6000) {
723 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
724
725 *ethirq = 3;
726 }
727#endif
728
729
730 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
731 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
732 lp->cf_cmd.cmd.command = CmdConfigure;
733 i596_add_cmd(dev, &lp->cf_cmd.cmd);
734
735 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
736 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
737 lp->sa_cmd.cmd.command = CmdSASetup;
738 i596_add_cmd(dev, &lp->sa_cmd.cmd);
739
740 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
741 lp->tdr_cmd.cmd.command = CmdTDR;
742 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
743
744 spin_lock_irqsave (&lp->lock, flags);
745
746 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
747 spin_unlock_irqrestore (&lp->lock, flags);
748 goto failed;
749 }
750 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
751 lp->scb.command = RX_START;
752 CA(dev);
753
754 spin_unlock_irqrestore (&lp->lock, flags);
755
756 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
757 goto failed;
758 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
759 return 0;
760
761failed:
762 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
763 MPU_PORT(dev, PORT_RESET, NULL);
764 return -1;
765}
766
767static inline int i596_rx(struct net_device *dev)
768{
769 struct i596_private *lp = dev->priv;
770 struct i596_rfd *rfd;
771 struct i596_rbd *rbd;
772 int frames = 0;
773
774 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
775 lp->rfd_head, lp->rbd_head));
776
777 rfd = lp->rfd_head; /* Ref next frame to check */
778
779 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
780 if (rfd->rbd == I596_NULL)
781 rbd = I596_NULL;
782 else if (rfd->rbd == lp->rbd_head->b_addr)
783 rbd = lp->rbd_head;
784 else {
785 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
786 /* XXX Now what? */
787 rbd = I596_NULL;
788 }
789 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
790 rfd, rfd->rbd, rfd->stat));
6aa20a22 791
1da177e4
LT		 792 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
793 /* a good frame */
794 int pkt_len = rbd->count & 0x3fff;
795 struct sk_buff *skb = rbd->skb;
796 int rx_in_place = 0;
797
798 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
799 frames++;
800
801 /* Check if the packet is long enough to just accept
802 * without copying to a properly sized skbuff.
803 */
804
805 if (pkt_len > rx_copybreak) {
806 struct sk_buff *newskb;
807
808 /* Get fresh skbuff to replace filled one. */
809 newskb = dev_alloc_skb(PKT_BUF_SZ);
810 if (newskb == NULL) {
811 skb = NULL; /* drop pkt */
812 goto memory_squeeze;
813 }
814 /* Pass up the skb already on the Rx ring. */
815 skb_put(skb, pkt_len);
816 rx_in_place = 1;
817 rbd->skb = newskb;
818 newskb->dev = dev;
689be439
DM		 819 rbd->v_data = newskb->data;
820 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
1da177e4 821#ifdef __mc68000__
689be439 822 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
1da177e4
LT		 823#endif
824 }
825 else
826 skb = dev_alloc_skb(pkt_len + 2);
827memory_squeeze:
828 if (skb == NULL) {
829 /* XXX tulip.c can defer packets here!! */
830 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
831 lp->stats.rx_dropped++;
832 }
833 else {
1da177e4
LT		 834 if (!rx_in_place) {
835 /* 16 byte align the data fields */
836 skb_reserve(skb, 2);
837 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
838 }
839 skb->protocol=eth_type_trans(skb,dev);
840 skb->len = pkt_len;
841#ifdef __mc68000__
689be439 842 cache_clear(virt_to_phys(rbd->skb->data),
1da177e4
LT		 843 pkt_len);
844#endif
845 netif_rx(skb);
846 dev->last_rx = jiffies;
847 lp->stats.rx_packets++;
848 lp->stats.rx_bytes+=pkt_len;
849 }
850 }
851 else {
852 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
853 dev->name, rfd->stat));
854 lp->stats.rx_errors++;
855 if ((rfd->stat) & 0x0001)
856 lp->stats.collisions++;
857 if ((rfd->stat) & 0x0080)
858 lp->stats.rx_length_errors++;
859 if ((rfd->stat) & 0x0100)
860 lp->stats.rx_over_errors++;
861 if ((rfd->stat) & 0x0200)
862 lp->stats.rx_fifo_errors++;
863 if ((rfd->stat) & 0x0400)
864 lp->stats.rx_frame_errors++;
865 if ((rfd->stat) & 0x0800)
866 lp->stats.rx_crc_errors++;
867 if ((rfd->stat) & 0x1000)
868 lp->stats.rx_length_errors++;
869 }
870
871 /* Clear the buffer descriptor count and EOF + F flags */
872
873 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
874 rbd->count = 0;
875 lp->rbd_head = rbd->v_next;
876 }
877
878 /* Tidy the frame descriptor, marking it as end of list */
879
880 rfd->rbd = I596_NULL;
881 rfd->stat = 0;
882 rfd->cmd = CMD_EOL|CMD_FLEX;
883 rfd->count = 0;
884
885 /* Remove end-of-list from old end descriptor */
886
887 rfd->v_prev->cmd = CMD_FLEX;
888
889 /* Update record of next frame descriptor to process */
890
891 lp->scb.rfd = rfd->b_next;
892 lp->rfd_head = rfd->v_next;
893 rfd = lp->rfd_head;
894 }
895
896 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
897
898 return 0;
899}
900
901
864fe05d 902static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
1da177e4
LT		 903{
904 struct i596_cmd *ptr;
905
906 while (lp->cmd_head != I596_NULL) {
907 ptr = lp->cmd_head;
908 lp->cmd_head = ptr->v_next;
909 lp->cmd_backlog--;
910
911 switch ((ptr->command) & 0x7) {
912 case CmdTx:
913 {
914 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
915 struct sk_buff *skb = tx_cmd->skb;
916
917 dev_kfree_skb(skb);
918
919 lp->stats.tx_errors++;
920 lp->stats.tx_aborted_errors++;
921
922 ptr->v_next = ptr->b_next = I596_NULL;
923 tx_cmd->cmd.command = 0; /* Mark as free */
924 break;
925 }
926 default:
927 ptr->v_next = ptr->b_next = I596_NULL;
928 }
929 }
930
931 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
932 lp->scb.cmd = I596_NULL;
933}
934
864fe05d
AM		 935static void i596_reset(struct net_device *dev, struct i596_private *lp,
936 int ioaddr)
1da177e4
LT		 937{
938 unsigned long flags;
939
940 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
941
942 spin_lock_irqsave (&lp->lock, flags);
943
944 wait_cmd(dev,lp,100,"i596_reset timed out");
945
946 netif_stop_queue(dev);
947
948 lp->scb.command = CUC_ABORT | RX_ABORT;
949 CA(dev);
950
951 /* wait for shutdown */
952 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
953 spin_unlock_irqrestore (&lp->lock, flags);
954
955 i596_cleanup_cmd(dev,lp);
956 i596_rx(dev);
957
958 netif_start_queue(dev);
959 init_i596_mem(dev);
960}
961
962static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
963{
964 struct i596_private *lp = dev->priv;
965 int ioaddr = dev->base_addr;
966 unsigned long flags;
967
968 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
969
970 cmd->status = 0;
971 cmd->command |= (CMD_EOL | CMD_INTR);
972 cmd->v_next = cmd->b_next = I596_NULL;
973
974 spin_lock_irqsave (&lp->lock, flags);
975
976 if (lp->cmd_head != I596_NULL) {
977 lp->cmd_tail->v_next = cmd;
978 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
979 } else {
980 lp->cmd_head = cmd;
981 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
982 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
983 lp->scb.command = CUC_START;
984 CA(dev);
985 }
986 lp->cmd_tail = cmd;
987 lp->cmd_backlog++;
988
989 spin_unlock_irqrestore (&lp->lock, flags);
990
991 if (lp->cmd_backlog > max_cmd_backlog) {
992 unsigned long tickssofar = jiffies - lp->last_cmd;
993
994 if (tickssofar < ticks_limit)
995 return;
996
997 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
998
999 i596_reset(dev, lp, ioaddr);
1000 }
1001}
1002
1003static int i596_open(struct net_device *dev)
1004{
1005 int res = 0;
1006
1007 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1008
1009 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1010 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1011 return -EAGAIN;
1012 }
1013#ifdef ENABLE_MVME16x_NET
1014 if (MACH_IS_MVME16x) {
1015 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1016 return -EAGAIN;
1017 }
1018#endif
1019 init_rx_bufs(dev);
1020
1021 netif_start_queue(dev);
1022
1023 /* Initialize the 82596 memory */
1024 if (init_i596_mem(dev)) {
1025 res = -EAGAIN;
1026 free_irq(dev->irq, dev);
1027 }
1028
1029 return res;
1030}
1031
1032static void i596_tx_timeout (struct net_device *dev)
1033{
1034 struct i596_private *lp = dev->priv;
1035 int ioaddr = dev->base_addr;
1036
1037 /* Transmitter timeout, serious problems. */
1038 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1039 dev->name));
1040
1041 lp->stats.tx_errors++;
1042
1043 /* Try to restart the adaptor */
1044 if (lp->last_restart == lp->stats.tx_packets) {
1045 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1046 /* Shutdown and restart */
1047 i596_reset (dev, lp, ioaddr);
1048 } else {
1049 /* Issue a channel attention signal */
1050 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1051 lp->scb.command = CUC_START | RX_START;
1052 CA (dev);
1053 lp->last_restart = lp->stats.tx_packets;
1054 }
1055
1056 dev->trans_start = jiffies;
1057 netif_wake_queue (dev);
1058}
1059
1060
1061static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1062{
1063 struct i596_private *lp = dev->priv;
1064 struct tx_cmd *tx_cmd;
1065 struct i596_tbd *tbd;
1066 short length = skb->len;
1067 dev->trans_start = jiffies;
1068
9e8e83d1
AM		 1069 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1070 dev->name, skb->len, skb->data));
1da177e4
LT		 1071
1072 if (skb->len < ETH_ZLEN) {
5b057c6b 1073 if (skb_padto(skb, ETH_ZLEN))
1da177e4
LT		 1074 return 0;
1075 length = ETH_ZLEN;
1076 }
1077 netif_stop_queue(dev);
1078
1079 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1080 tbd = lp->tbds + lp->next_tx_cmd;
1081
1082 if (tx_cmd->cmd.command) {
1083 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1084 dev->name);
1085 lp->stats.tx_dropped++;
1086
1087 dev_kfree_skb(skb);
1088 } else {
1089 if (++lp->next_tx_cmd == TX_RING_SIZE)
1090 lp->next_tx_cmd = 0;
1091 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1092 tbd->next = I596_NULL;
1093
1094 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1095 tx_cmd->skb = skb;
1096
1097 tx_cmd->pad = 0;
1098 tx_cmd->size = 0;
1099 tbd->pad = 0;
1100 tbd->size = EOF | length;
1101
1102 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1103
1104#ifdef __mc68000__
1105 cache_push(virt_to_phys(skb->data), length);
1106#endif
1107 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1108 i596_add_cmd(dev, &tx_cmd->cmd);
1109
1110 lp->stats.tx_packets++;
1111 lp->stats.tx_bytes += length;
1112 }
1113
1114 netif_start_queue(dev);
1115
1116 return 0;
1117}
1118
1119static void print_eth(unsigned char *add, char *str)
1120{
1121 int i;
1122
1123 printk(KERN_DEBUG "i596 0x%p, ", add);
1124 for (i = 0; i < 6; i++)
1125 printk(" %02X", add[i + 6]);
1126 printk(" -->");
1127 for (i = 0; i < 6; i++)
1128 printk(" %02X", add[i]);
1129 printk(" %02X%02X, %s\n", add[12], add[13], str);
1130}
1131
1132static int io = 0x300;
1133static int irq = 10;
1134
1135struct net_device * __init i82596_probe(int unit)
1136{
1137 struct net_device *dev;
1138 int i;
1139 struct i596_private *lp;
1140 char eth_addr[8];
1141 static int probed;
1142 int err;
1143
1144 if (probed)
1145 return ERR_PTR(-ENODEV);
1146 probed++;
1147
1148 dev = alloc_etherdev(0);
1149 if (!dev)
1150 return ERR_PTR(-ENOMEM);
1151
1152 if (unit >= 0) {
1153 sprintf(dev->name, "eth%d", unit);
1154 netdev_boot_setup_check(dev);
1155 } else {
1156 dev->base_addr = io;
1157 dev->irq = irq;
1158 }
1159
1160#ifdef ENABLE_MVME16x_NET
1161 if (MACH_IS_MVME16x) {
1162 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1163 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1164 err = -ENODEV;
1165 goto out;
1166 }
1167 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1168 dev->base_addr = MVME_I596_BASE;
1169 dev->irq = (unsigned) MVME16x_IRQ_I596;
1170 }
1171#endif
1172#ifdef ENABLE_BVME6000_NET
1173 if (MACH_IS_BVME6000) {
1174 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1175 unsigned char msr = rtc[3];
1176 int i;
1177
1178 rtc[3] |= 0x80;
1179 for (i = 0; i < 6; i++)
1180 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1181 rtc[3] = msr;
1182 dev->base_addr = BVME_I596_BASE;
1183 dev->irq = (unsigned) BVME_IRQ_I596;
1184 }
1185#endif
1186#ifdef ENABLE_APRICOT
1187 {
1188 int checksum = 0;
1189 int ioaddr = 0x300;
1190
1191 /* this is easy the ethernet interface can only be at 0x300 */
1192 /* first check nothing is already registered here */
1193
1194 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1195 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1196 err = -EBUSY;
1197 goto out;
1198 }
1199
1200 for (i = 0; i < 8; i++) {
1201 eth_addr[i] = inb(ioaddr + 8 + i);
1202 checksum += eth_addr[i];
1203 }
1204
1205 /* checksum is a multiple of 0x100, got this wrong first time
1206 some machines have 0x100, some 0x200. The DOS driver doesn't
1207 even bother with the checksum.
1208 Some other boards trip the checksum.. but then appear as
1209 ether address 0. Trap these - AC */
1210
6aa20a22 1211 if ((checksum % 0x100) ||
1da177e4
LT		 1212 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1213 err = -ENODEV;
1214 goto out1;
1215 }
1216
1217 dev->base_addr = ioaddr;
1218 dev->irq = 10;
1219 }
1220#endif
1221 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1222 if (!dev->mem_start) {
1223 err = -ENOMEM;
1224 goto out1;
1225 }
1226
1227 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1228
1229 for (i = 0; i < 6; i++)
1230 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1231
1232 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1233
1234 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1235
1236 /* The 82596-specific entries in the device structure. */
1da177e4
LT		 1237 dev->open = i596_open;
1238 dev->stop = i596_close;
1239 dev->hard_start_xmit = i596_start_xmit;
1240 dev->get_stats = i596_get_stats;
1241 dev->set_multicast_list = set_multicast_list;
1242 dev->tx_timeout = i596_tx_timeout;
1243 dev->watchdog_timeo = TX_TIMEOUT;
1244
1245 dev->priv = (void *)(dev->mem_start);
1246
1247 lp = dev->priv;
9e8e83d1
AM		 1248 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1249 "lp->scb at 0x%08lx\n",
1da177e4
LT		 1250 dev->name, (unsigned long)lp,
1251 sizeof(struct i596_private), (unsigned long)&lp->scb));
1252 memset((void *) lp, 0, sizeof(struct i596_private));
1253
1254#ifdef __mc68000__
1255 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1256 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1257 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1258#endif
1259 lp->scb.command = 0;
1260 lp->scb.cmd = I596_NULL;
1261 lp->scb.rfd = I596_NULL;
1262 spin_lock_init(&lp->lock);
1263
1264 err = register_netdev(dev);
1265 if (err)
1266 goto out2;
1267 return dev;
1268out2:
1269#ifdef __mc68000__
1270 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1271 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1272 */
1273 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1274 IOMAP_FULL_CACHING);
1275#endif
1276 free_page ((u32)(dev->mem_start));
1277out1:
1278#ifdef ENABLE_APRICOT
1279 release_region(dev->base_addr, I596_TOTAL_SIZE);
1280#endif
1281out:
1282 free_netdev(dev);
1283 return ERR_PTR(err);
1284}
1285
7d12e780 1286static irqreturn_t i596_interrupt(int irq, void *dev_id)
1da177e4
LT		 1287{
1288 struct net_device *dev = dev_id;
1289 struct i596_private *lp;
1290 short ioaddr;
1291 unsigned short status, ack_cmd = 0;
1292 int handled = 0;
1293
1294#ifdef ENABLE_BVME6000_NET
1295 if (MACH_IS_BVME6000) {
1296 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
7d12e780 1297 i596_error(irq, dev_id);
1da177e4
LT		 1298 return IRQ_HANDLED;
1299 }
1300 }
1301#endif
1302 if (dev == NULL) {
1303 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1304 return IRQ_NONE;
1305 }
1306
1307 ioaddr = dev->base_addr;
1308 lp = dev->priv;
1309
1310 spin_lock (&lp->lock);
1311
1312 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1313 status = lp->scb.status;
1314
1315 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1316 dev->name, irq, status));
1317
1318 ack_cmd = status & 0xf000;
1319
1320 if ((status & 0x8000) || (status & 0x2000)) {
1321 struct i596_cmd *ptr;
1322
1323 handled = 1;
1324 if ((status & 0x8000))
1325 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1326 if ((status & 0x2000))
1327 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1328
1329 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1330 ptr = lp->cmd_head;
1331
1332 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1333 lp->cmd_head->status, lp->cmd_head->command));
1334 lp->cmd_head = ptr->v_next;
1335 lp->cmd_backlog--;
1336
1337 switch ((ptr->command) & 0x7) {
1338 case CmdTx:
1339 {
1340 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1341 struct sk_buff *skb = tx_cmd->skb;
1342
1343 if ((ptr->status) & STAT_OK) {
1344 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1345 } else {
1346 lp->stats.tx_errors++;
1347 if ((ptr->status) & 0x0020)
1348 lp->stats.collisions++;
1349 if (!((ptr->status) & 0x0040))
1350 lp->stats.tx_heartbeat_errors++;
1351 if ((ptr->status) & 0x0400)
1352 lp->stats.tx_carrier_errors++;
1353 if ((ptr->status) & 0x0800)
1354 lp->stats.collisions++;
1355 if ((ptr->status) & 0x1000)
1356 lp->stats.tx_aborted_errors++;
1357 }
1358
1359 dev_kfree_skb_irq(skb);
1360
1361 tx_cmd->cmd.command = 0; /* Mark free */
1362 break;
1363 }
1364 case CmdTDR:
1365 {
1366 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1367
1368 if (status & 0x8000) {
1369 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1370 } else {
1371 if (status & 0x4000)
1372 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1373 if (status & 0x2000)
1374 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1375 if (status & 0x1000)
1376 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1377
1378 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1379 }
1380 break;
1381 }
1382 case CmdConfigure:
1383 case CmdMulticastList:
1384 /* Zap command so set_multicast_list() knows it is free */
1385 ptr->command = 0;
1386 break;
1387 }
1388 ptr->v_next = ptr->b_next = I596_NULL;
1389 lp->last_cmd = jiffies;
1390 }
1391
1392 ptr = lp->cmd_head;
1393 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1394 ptr->command &= 0x1fff;
1395 ptr = ptr->v_next;
1396 }
1397
1398 if ((lp->cmd_head != I596_NULL))
1399 ack_cmd |= CUC_START;
1400 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1401 }
1402 if ((status & 0x1000) || (status & 0x4000)) {
1403 if ((status & 0x4000))
1404 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1405 i596_rx(dev);
1406 /* Only RX_START if stopped - RGH 07-07-96 */
1407 if (status & 0x1000) {
1408 if (netif_running(dev)) {
1409 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1410 ack_cmd |= RX_START;
1411 lp->stats.rx_errors++;
1412 lp->stats.rx_fifo_errors++;
1413 rebuild_rx_bufs(dev);
1414 }
1415 }
1416 }
1417 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1418 lp->scb.command = ack_cmd;
1419
1420#ifdef ENABLE_MVME16x_NET
1421 if (MACH_IS_MVME16x) {
1422 /* Ack the interrupt */
1423
1424 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1425
1426 pcc2[0x2a] |= 0x08;
1427 }
1428#endif
1429#ifdef ENABLE_BVME6000_NET
1430 if (MACH_IS_BVME6000) {
1431 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1432
1433 *ethirq = 1;
1434 *ethirq = 3;
1435 }
1436#endif
1437#ifdef ENABLE_APRICOT
1438 (void) inb(ioaddr + 0x10);
1439 outb(4, ioaddr + 0xf);
1440#endif
1441 CA(dev);
1442
1443 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1444
1445 spin_unlock (&lp->lock);
1446 return IRQ_RETVAL(handled);
1447}
1448
1449static int i596_close(struct net_device *dev)
1450{
1451 struct i596_private *lp = dev->priv;
1452 unsigned long flags;
1453
1454 netif_stop_queue(dev);
1455
1456 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1457 dev->name, lp->scb.status));
1458
1459 spin_lock_irqsave(&lp->lock, flags);
1460
1461 wait_cmd(dev,lp,100,"close1 timed out");
1462 lp->scb.command = CUC_ABORT | RX_ABORT;
1463 CA(dev);
1464
1465 wait_cmd(dev,lp,100,"close2 timed out");
1466
1467 spin_unlock_irqrestore(&lp->lock, flags);
1468 DEB(DEB_STRUCT,i596_display_data(dev));
1469 i596_cleanup_cmd(dev,lp);
1470
1471#ifdef ENABLE_MVME16x_NET
1472 if (MACH_IS_MVME16x) {
1473 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1474
1475 /* Disable all ints */
1476 pcc2[0x28] = 1;
1477 pcc2[0x2a] = 0x40;
1478 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1479 }
1480#endif
1481#ifdef ENABLE_BVME6000_NET
1482 if (MACH_IS_BVME6000) {
1483 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1484
1485 *ethirq = 1;
1486 }
1487#endif
1488
1489 free_irq(dev->irq, dev);
1490 remove_rx_bufs(dev);
1491
1492 return 0;
1493}
1494
1495static struct net_device_stats *
1496 i596_get_stats(struct net_device *dev)
1497{
1498 struct i596_private *lp = dev->priv;
1499
1500 return &lp->stats;
1501}
1502
1503/*
1504 * Set or clear the multicast filter for this adaptor.
1505 */
1506
1507static void set_multicast_list(struct net_device *dev)
1508{
1509 struct i596_private *lp = dev->priv;
1510 int config = 0, cnt;
1511
1512 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1513 dev->name, dev->mc_count,
1514 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1515 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1516
1517 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1518 return;
1519
1520 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1521 lp->cf_cmd.i596_config[8] |= 0x01;
1522 config = 1;
1523 }
1524 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1525 lp->cf_cmd.i596_config[8] &= ~0x01;
1526 config = 1;
1527 }
1528 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1529 lp->cf_cmd.i596_config[11] &= ~0x20;
1530 config = 1;
1531 }
1532 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1533 lp->cf_cmd.i596_config[11] |= 0x20;
1534 config = 1;
1535 }
1536 if (config) {
1537 lp->cf_cmd.cmd.command = CmdConfigure;
1538 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1539 }
1540
1541 cnt = dev->mc_count;
1542 if (cnt > MAX_MC_CNT)
1543 {
1544 cnt = MAX_MC_CNT;
1545 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1546 dev->name, cnt);
1547 }
6aa20a22 1548
1da177e4
LT		 1549 if (dev->mc_count > 0) {
1550 struct dev_mc_list *dmi;
1551 unsigned char *cp;
1552 struct mc_cmd *cmd;
1553
1554 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1555 return;
1556 cmd = &lp->mc_cmd;
1557 cmd->cmd.command = CmdMulticastList;
1558 cmd->mc_cnt = dev->mc_count * 6;
1559 cp = cmd->mc_addrs;
1560 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1561 memcpy(cp, dmi->dmi_addr, 6);
1562 if (i596_debug > 1)
1563 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1564 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1565 }
1566 i596_add_cmd(dev, &cmd->cmd);
1567 }
1568}
1569
1570#ifdef MODULE
1571static struct net_device *dev_82596;
1572
1573#ifdef ENABLE_APRICOT
1574module_param(irq, int, 0);
1575MODULE_PARM_DESC(irq, "Apricot IRQ number");
1576#endif
1577
1578static int debug = -1;
1579module_param(debug, int, 0);
1580MODULE_PARM_DESC(debug, "i82596 debug mask");
1581
864fe05d 1582int __init init_module(void)
1da177e4
LT		 1583{
1584 if (debug >= 0)
1585 i596_debug = debug;
1586 dev_82596 = i82596_probe(-1);
1587 if (IS_ERR(dev_82596))
1588 return PTR_ERR(dev_82596);
1589 return 0;
1590}
1591
864fe05d 1592void __exit cleanup_module(void)
1da177e4
LT		 1593{
1594 unregister_netdev(dev_82596);
1595#ifdef __mc68000__
1596 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1597 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1598 */
1599
1600 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1601 IOMAP_FULL_CACHING);
1602#endif
1603 free_page ((u32)(dev_82596->mem_start));
1604#ifdef ENABLE_APRICOT
1605 /* If we don't do this, we can't re-insmod it later. */
1606 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1607#endif
1608 free_netdev(dev_82596);
1609}
1610
1611#endif /* MODULE */
6aa20a22 1612
1da177e4
LT		 1613/*
1614 * Local variables:
1615 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1616 * End:
1617 */
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