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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 * performance 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
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/interrupt.h>
49#include <linux/delay.h>
50#include <linux/netdevice.h>
51#include <linux/etherdevice.h>
52#include <linux/skbuff.h>
53#include <linux/init.h>
54#include <linux/bitops.h>
55#include <linux/gfp.h>
56
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/pgtable.h>
60#include <asm/cacheflush.h>
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 *)((long)x))
126#define WSWAPrbd(x) ((struct i596_rbd *)((long)x))
127#define WSWAPiscp(x) ((struct i596_iscp *)((long)x))
128#define WSWAPscb(x) ((struct i596_scb *)((long)x))
129#define WSWAPcmd(x) ((struct i596_cmd *)((long)x))
130#define WSWAPtbd(x) ((struct i596_tbd *)((long)x))
131#define WSWAPchar(x) ((char *)((long)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 (HZ/20)
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 i596_rfd rfds[RX_RING_SIZE];
330 struct i596_rbd rbds[RX_RING_SIZE];
331 struct tx_cmd tx_cmds[TX_RING_SIZE];
332 struct i596_tbd tbds[TX_RING_SIZE];
333 int next_tx_cmd;
334 spinlock_t lock;
335};
336
337static char init_setup[] =
338{
339 0x8E, /* length, prefetch on */
340 0xC8, /* fifo to 8, monitor off */
341#ifdef CONFIG_VME
342 0xc0, /* don't save bad frames */
343#else
344 0x80, /* don't save bad frames */
345#endif
346 0x2E, /* No source address insertion, 8 byte preamble */
347 0x00, /* priority and backoff defaults */
348 0x60, /* interframe spacing */
349 0x00, /* slot time LSB */
350 0xf2, /* slot time and retries */
351 0x00, /* promiscuous mode */
352 0x00, /* collision detect */
353 0x40, /* minimum frame length */
354 0xff,
355 0x00,
356 0x7f /* *multi IA */ };
357
358static int i596_open(struct net_device *dev);
359static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
360static irqreturn_t i596_interrupt(int irq, void *dev_id);
361static int i596_close(struct net_device *dev);
362static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
363static void i596_tx_timeout (struct net_device *dev);
364static void print_eth(unsigned char *buf, char *str);
365static void set_multicast_list(struct net_device *dev);
366
367static int rx_ring_size = RX_RING_SIZE;
368static int ticks_limit = 25;
369static int max_cmd_backlog = TX_RING_SIZE-1;
370
371
372static inline void CA(struct net_device *dev)
373{
374#ifdef ENABLE_MVME16x_NET
375 if (MACH_IS_MVME16x) {
376 ((struct i596_reg *) dev->base_addr)->ca = 1;
377 }
378#endif
379#ifdef ENABLE_BVME6000_NET
380 if (MACH_IS_BVME6000) {
381 volatile u32 i;
382
383 i = *(volatile u32 *) (dev->base_addr);
384 }
385#endif
386#ifdef ENABLE_APRICOT
387 if (MACH_IS_APRICOT) {
388 outw(0, (short) (dev->base_addr) + 4);
389 }
390#endif
391}
392
393
394static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
395{
396#ifdef ENABLE_MVME16x_NET
397 if (MACH_IS_MVME16x) {
398 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
399 p->porthi = ((c) | (u32) (x)) & 0xffff;
400 p->portlo = ((c) | (u32) (x)) >> 16;
401 }
402#endif
403#ifdef ENABLE_BVME6000_NET
404 if (MACH_IS_BVME6000) {
405 u32 v = (u32) (c) | (u32) (x);
406 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
407 *(volatile u32 *) dev->base_addr = v;
408 udelay(1);
409 *(volatile u32 *) dev->base_addr = v;
410 }
411#endif
412}
413
414
415static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
416{
417 while (--delcnt && lp->iscp.stat)
418 udelay(10);
419 if (!delcnt) {
420 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
421 dev->name, str, lp->scb.status, lp->scb.command);
422 return -1;
423 }
424 else
425 return 0;
426}
427
428
429static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
430{
431 while (--delcnt && lp->scb.command)
432 udelay(10);
433 if (!delcnt) {
434 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
435 dev->name, str, lp->scb.status, lp->scb.command);
436 return -1;
437 }
438 else
439 return 0;
440}
441
442
443static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
444{
445 volatile struct i596_cmd *c = cmd;
446
447 while (--delcnt && c->command)
448 udelay(10);
449 if (!delcnt) {
450 printk(KERN_ERR "%s: %s.\n", dev->name, str);
451 return -1;
452 }
453 else
454 return 0;
455}
456
457
458static void i596_display_data(struct net_device *dev)
459{
460 struct i596_private *lp = dev->ml_priv;
461 struct i596_cmd *cmd;
462 struct i596_rfd *rfd;
463 struct i596_rbd *rbd;
464
465 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
466 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
467 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
468 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
469 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
470 " .cmd = %p, .rfd = %p\n",
471 &lp->scb, lp->scb.status, lp->scb.command,
472 lp->scb.cmd, lp->scb.rfd);
473 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
474 " over %lx, rcvdt %lx, short %lx\n",
475 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
476 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
477 cmd = lp->cmd_head;
478 while (cmd != I596_NULL) {
479 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
480 cmd, cmd->status, cmd->command, cmd->b_next);
481 cmd = cmd->v_next;
482 }
483 rfd = lp->rfd_head;
484 printk(KERN_ERR "rfd_head = %p\n", rfd);
485 do {
486 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
487 " count %04x\n",
488 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
489 rfd->count);
490 rfd = rfd->v_next;
491 } while (rfd != lp->rfd_head);
492 rbd = lp->rbd_head;
493 printk(KERN_ERR "rbd_head = %p\n", rbd);
494 do {
495 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
496 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
497 rbd = rbd->v_next;
498 } while (rbd != lp->rbd_head);
499}
500
501
502#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
503static irqreturn_t i596_error(int irq, void *dev_id)
504{
505 struct net_device *dev = dev_id;
506#ifdef ENABLE_MVME16x_NET
507 if (MACH_IS_MVME16x) {
508 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
509
510 pcc2[0x28] = 1;
511 pcc2[0x2b] = 0x1d;
512 }
513#endif
514#ifdef ENABLE_BVME6000_NET
515 if (MACH_IS_BVME6000) {
516 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
517
518 *ethirq = 1;
519 *ethirq = 3;
520 }
521#endif
522 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
523 i596_display_data(dev);
524 return IRQ_HANDLED;
525}
526#endif
527
528static inline void remove_rx_bufs(struct net_device *dev)
529{
530 struct i596_private *lp = dev->ml_priv;
531 struct i596_rbd *rbd;
532 int i;
533
534 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
535 if (rbd->skb == NULL)
536 break;
537 dev_kfree_skb(rbd->skb);
538 rbd->skb = NULL;
539 }
540}
541
542static inline int init_rx_bufs(struct net_device *dev)
543{
544 struct i596_private *lp = dev->ml_priv;
545 int i;
546 struct i596_rfd *rfd;
547 struct i596_rbd *rbd;
548
549 /* First build the Receive Buffer Descriptor List */
550
551 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
552 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
553
554 if (skb == NULL) {
555 remove_rx_bufs(dev);
556 return -ENOMEM;
557 }
558
559 skb->dev = dev;
560 rbd->v_next = rbd+1;
561 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
562 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
563 rbd->skb = skb;
564 rbd->v_data = skb->data;
565 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
566 rbd->size = PKT_BUF_SZ;
567#ifdef __mc68000__
568 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
569#endif
570 }
571 lp->rbd_head = lp->rbds;
572 rbd = lp->rbds + rx_ring_size - 1;
573 rbd->v_next = lp->rbds;
574 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
575
576 /* Now build the Receive Frame Descriptor List */
577
578 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
579 rfd->rbd = I596_NULL;
580 rfd->v_next = rfd+1;
581 rfd->v_prev = rfd-1;
582 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
583 rfd->cmd = CMD_FLEX;
584 }
585 lp->rfd_head = lp->rfds;
586 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
587 rfd = lp->rfds;
588 rfd->rbd = lp->rbd_head;
589 rfd->v_prev = lp->rfds + rx_ring_size - 1;
590 rfd = lp->rfds + rx_ring_size - 1;
591 rfd->v_next = lp->rfds;
592 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
593 rfd->cmd = CMD_EOL|CMD_FLEX;
594
595 return 0;
596}
597
598
599static void rebuild_rx_bufs(struct net_device *dev)
600{
601 struct i596_private *lp = dev->ml_priv;
602 int i;
603
604 /* Ensure rx frame/buffer descriptors are tidy */
605
606 for (i = 0; i < rx_ring_size; i++) {
607 lp->rfds[i].rbd = I596_NULL;
608 lp->rfds[i].cmd = CMD_FLEX;
609 }
610 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
611 lp->rfd_head = lp->rfds;
612 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
613 lp->rbd_head = lp->rbds;
614 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
615}
616
617
618static int init_i596_mem(struct net_device *dev)
619{
620 struct i596_private *lp = dev->ml_priv;
621#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
622 short ioaddr = dev->base_addr;
623#endif
624 unsigned long flags;
625
626 MPU_PORT(dev, PORT_RESET, NULL);
627
628 udelay(100); /* Wait 100us - seems to help */
629
630#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
631#ifdef ENABLE_MVME16x_NET
632 if (MACH_IS_MVME16x) {
633 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
634
635 /* Disable all ints for now */
636 pcc2[0x28] = 1;
637 pcc2[0x2a] = 0x48;
638 /* Following disables snooping. Snooping is not required
639 * as we make appropriate use of non-cached pages for
640 * shared data, and cache_push/cache_clear.
641 */
642 pcc2[0x2b] = 0x08;
643 }
644#endif
645#ifdef ENABLE_BVME6000_NET
646 if (MACH_IS_BVME6000) {
647 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
648
649 *ethirq = 1;
650 }
651#endif
652
653 /* change the scp address */
654
655 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
656
657#elif defined(ENABLE_APRICOT)
658
659 {
660 u32 scp = virt_to_bus(&lp->scp);
661
662 /* change the scp address */
663 outw(0, ioaddr);
664 outw(0, ioaddr);
665 outb(4, ioaddr + 0xf);
666 outw(scp | 2, ioaddr);
667 outw(scp >> 16, ioaddr);
668 }
669#endif
670
671 lp->last_cmd = jiffies;
672
673#ifdef ENABLE_MVME16x_NET
674 if (MACH_IS_MVME16x)
675 lp->scp.sysbus = 0x00000054;
676#endif
677#ifdef ENABLE_BVME6000_NET
678 if (MACH_IS_BVME6000)
679 lp->scp.sysbus = 0x0000004c;
680#endif
681#ifdef ENABLE_APRICOT
682 if (MACH_IS_APRICOT)
683 lp->scp.sysbus = 0x00440000;
684#endif
685
686 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
687 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
688 lp->iscp.stat = ISCP_BUSY;
689 lp->cmd_backlog = 0;
690
691 lp->cmd_head = lp->scb.cmd = I596_NULL;
692
693#ifdef ENABLE_BVME6000_NET
694 if (MACH_IS_BVME6000) {
695 lp->scb.t_on = 7 * 25;
696 lp->scb.t_off = 1 * 25;
697 }
698#endif
699
700 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
701
702#if defined(ENABLE_APRICOT)
703 (void) inb(ioaddr + 0x10);
704 outb(4, ioaddr + 0xf);
705#endif
706 CA(dev);
707
708 if (wait_istat(dev,lp,1000,"initialization timed out"))
709 goto failed;
710 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
711
712 /* Ensure rx frame/buffer descriptors are tidy */
713 rebuild_rx_bufs(dev);
714 lp->scb.command = 0;
715
716#ifdef ENABLE_MVME16x_NET
717 if (MACH_IS_MVME16x) {
718 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
719
720 /* Enable ints, etc. now */
721 pcc2[0x2a] = 0x55; /* Edge sensitive */
722 pcc2[0x2b] = 0x15;
723 }
724#endif
725#ifdef ENABLE_BVME6000_NET
726 if (MACH_IS_BVME6000) {
727 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
728
729 *ethirq = 3;
730 }
731#endif
732
733
734 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
735 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
736 lp->cf_cmd.cmd.command = CmdConfigure;
737 i596_add_cmd(dev, &lp->cf_cmd.cmd);
738
739 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
740 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
741 lp->sa_cmd.cmd.command = CmdSASetup;
742 i596_add_cmd(dev, &lp->sa_cmd.cmd);
743
744 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
745 lp->tdr_cmd.cmd.command = CmdTDR;
746 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
747
748 spin_lock_irqsave (&lp->lock, flags);
749
750 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
751 spin_unlock_irqrestore (&lp->lock, flags);
752 goto failed;
753 }
754 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
755 lp->scb.command = RX_START;
756 CA(dev);
757
758 spin_unlock_irqrestore (&lp->lock, flags);
759
760 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
761 goto failed;
762 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
763 return 0;
764
765failed:
766 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
767 MPU_PORT(dev, PORT_RESET, NULL);
768 return -1;
769}
770
771static inline int i596_rx(struct net_device *dev)
772{
773 struct i596_private *lp = dev->ml_priv;
774 struct i596_rfd *rfd;
775 struct i596_rbd *rbd;
776 int frames = 0;
777
778 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
779 lp->rfd_head, lp->rbd_head));
780
781 rfd = lp->rfd_head; /* Ref next frame to check */
782
783 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
784 if (rfd->rbd == I596_NULL)
785 rbd = I596_NULL;
786 else if (rfd->rbd == lp->rbd_head->b_addr)
787 rbd = lp->rbd_head;
788 else {
789 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
790 /* XXX Now what? */
791 rbd = I596_NULL;
792 }
793 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
794 rfd, rfd->rbd, rfd->stat));
795
796 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
797 /* a good frame */
798 int pkt_len = rbd->count & 0x3fff;
799 struct sk_buff *skb = rbd->skb;
800 int rx_in_place = 0;
801
802 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
803 frames++;
804
805 /* Check if the packet is long enough to just accept
806 * without copying to a properly sized skbuff.
807 */
808
809 if (pkt_len > rx_copybreak) {
810 struct sk_buff *newskb;
811
812 /* Get fresh skbuff to replace filled one. */
813 newskb = dev_alloc_skb(PKT_BUF_SZ);
814 if (newskb == NULL) {
815 skb = NULL; /* drop pkt */
816 goto memory_squeeze;
817 }
818 /* Pass up the skb already on the Rx ring. */
819 skb_put(skb, pkt_len);
820 rx_in_place = 1;
821 rbd->skb = newskb;
822 newskb->dev = dev;
823 rbd->v_data = newskb->data;
824 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
825#ifdef __mc68000__
826 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
827#endif
828 }
829 else
830 skb = dev_alloc_skb(pkt_len + 2);
831memory_squeeze:
832 if (skb == NULL) {
833 /* XXX tulip.c can defer packets here!! */
834 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
835 dev->stats.rx_dropped++;
836 }
837 else {
838 if (!rx_in_place) {
839 /* 16 byte align the data fields */
840 skb_reserve(skb, 2);
841 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
842 }
843 skb->protocol=eth_type_trans(skb,dev);
844 skb->len = pkt_len;
845#ifdef __mc68000__
846 cache_clear(virt_to_phys(rbd->skb->data),
847 pkt_len);
848#endif
849 netif_rx(skb);
850 dev->stats.rx_packets++;
851 dev->stats.rx_bytes+=pkt_len;
852 }
853 }
854 else {
855 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
856 dev->name, rfd->stat));
857 dev->stats.rx_errors++;
858 if ((rfd->stat) & 0x0001)
859 dev->stats.collisions++;
860 if ((rfd->stat) & 0x0080)
861 dev->stats.rx_length_errors++;
862 if ((rfd->stat) & 0x0100)
863 dev->stats.rx_over_errors++;
864 if ((rfd->stat) & 0x0200)
865 dev->stats.rx_fifo_errors++;
866 if ((rfd->stat) & 0x0400)
867 dev->stats.rx_frame_errors++;
868 if ((rfd->stat) & 0x0800)
869 dev->stats.rx_crc_errors++;
870 if ((rfd->stat) & 0x1000)
871 dev->stats.rx_length_errors++;
872 }
873
874 /* Clear the buffer descriptor count and EOF + F flags */
875
876 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
877 rbd->count = 0;
878 lp->rbd_head = rbd->v_next;
879 }
880
881 /* Tidy the frame descriptor, marking it as end of list */
882
883 rfd->rbd = I596_NULL;
884 rfd->stat = 0;
885 rfd->cmd = CMD_EOL|CMD_FLEX;
886 rfd->count = 0;
887
888 /* Remove end-of-list from old end descriptor */
889
890 rfd->v_prev->cmd = CMD_FLEX;
891
892 /* Update record of next frame descriptor to process */
893
894 lp->scb.rfd = rfd->b_next;
895 lp->rfd_head = rfd->v_next;
896 rfd = lp->rfd_head;
897 }
898
899 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
900
901 return 0;
902}
903
904
905static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
906{
907 struct i596_cmd *ptr;
908
909 while (lp->cmd_head != I596_NULL) {
910 ptr = lp->cmd_head;
911 lp->cmd_head = ptr->v_next;
912 lp->cmd_backlog--;
913
914 switch ((ptr->command) & 0x7) {
915 case CmdTx:
916 {
917 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
918 struct sk_buff *skb = tx_cmd->skb;
919
920 dev_kfree_skb(skb);
921
922 dev->stats.tx_errors++;
923 dev->stats.tx_aborted_errors++;
924
925 ptr->v_next = ptr->b_next = I596_NULL;
926 tx_cmd->cmd.command = 0; /* Mark as free */
927 break;
928 }
929 default:
930 ptr->v_next = ptr->b_next = I596_NULL;
931 }
932 }
933
934 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
935 lp->scb.cmd = I596_NULL;
936}
937
938static void i596_reset(struct net_device *dev, struct i596_private *lp,
939 int ioaddr)
940{
941 unsigned long flags;
942
943 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
944
945 spin_lock_irqsave (&lp->lock, flags);
946
947 wait_cmd(dev,lp,100,"i596_reset timed out");
948
949 netif_stop_queue(dev);
950
951 lp->scb.command = CUC_ABORT | RX_ABORT;
952 CA(dev);
953
954 /* wait for shutdown */
955 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
956 spin_unlock_irqrestore (&lp->lock, flags);
957
958 i596_cleanup_cmd(dev,lp);
959 i596_rx(dev);
960
961 netif_start_queue(dev);
962 init_i596_mem(dev);
963}
964
965static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
966{
967 struct i596_private *lp = dev->ml_priv;
968 int ioaddr = dev->base_addr;
969 unsigned long flags;
970
971 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
972
973 cmd->status = 0;
974 cmd->command |= (CMD_EOL | CMD_INTR);
975 cmd->v_next = cmd->b_next = I596_NULL;
976
977 spin_lock_irqsave (&lp->lock, flags);
978
979 if (lp->cmd_head != I596_NULL) {
980 lp->cmd_tail->v_next = cmd;
981 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
982 } else {
983 lp->cmd_head = cmd;
984 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
985 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
986 lp->scb.command = CUC_START;
987 CA(dev);
988 }
989 lp->cmd_tail = cmd;
990 lp->cmd_backlog++;
991
992 spin_unlock_irqrestore (&lp->lock, flags);
993
994 if (lp->cmd_backlog > max_cmd_backlog) {
995 unsigned long tickssofar = jiffies - lp->last_cmd;
996
997 if (tickssofar < ticks_limit)
998 return;
999
1000 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
1001
1002 i596_reset(dev, lp, ioaddr);
1003 }
1004}
1005
1006static int i596_open(struct net_device *dev)
1007{
1008 int res = 0;
1009
1010 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1011
1012 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1013 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1014 return -EAGAIN;
1015 }
1016#ifdef ENABLE_MVME16x_NET
1017 if (MACH_IS_MVME16x) {
1018 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
1019 res = -EAGAIN;
1020 goto err_irq_dev;
1021 }
1022 }
1023#endif
1024 res = init_rx_bufs(dev);
1025 if (res)
1026 goto err_irq_56;
1027
1028 netif_start_queue(dev);
1029
1030 if (init_i596_mem(dev)) {
1031 res = -EAGAIN;
1032 goto err_queue;
1033 }
1034
1035 return 0;
1036
1037err_queue:
1038 netif_stop_queue(dev);
1039 remove_rx_bufs(dev);
1040err_irq_56:
1041#ifdef ENABLE_MVME16x_NET
1042 free_irq(0x56, dev);
1043err_irq_dev:
1044#endif
1045 free_irq(dev->irq, dev);
1046
1047 return res;
1048}
1049
1050static void i596_tx_timeout (struct net_device *dev)
1051{
1052 struct i596_private *lp = dev->ml_priv;
1053 int ioaddr = dev->base_addr;
1054
1055 /* Transmitter timeout, serious problems. */
1056 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1057 dev->name));
1058
1059 dev->stats.tx_errors++;
1060
1061 /* Try to restart the adaptor */
1062 if (lp->last_restart == dev->stats.tx_packets) {
1063 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1064 /* Shutdown and restart */
1065 i596_reset (dev, lp, ioaddr);
1066 } else {
1067 /* Issue a channel attention signal */
1068 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1069 lp->scb.command = CUC_START | RX_START;
1070 CA (dev);
1071 lp->last_restart = dev->stats.tx_packets;
1072 }
1073
1074 dev->trans_start = jiffies; /* prevent tx timeout */
1075 netif_wake_queue (dev);
1076}
1077
1078static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1079{
1080 struct i596_private *lp = dev->ml_priv;
1081 struct tx_cmd *tx_cmd;
1082 struct i596_tbd *tbd;
1083 short length = skb->len;
1084
1085 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1086 dev->name, skb->len, skb->data));
1087
1088 if (skb->len < ETH_ZLEN) {
1089 if (skb_padto(skb, ETH_ZLEN))
1090 return NETDEV_TX_OK;
1091 length = ETH_ZLEN;
1092 }
1093 netif_stop_queue(dev);
1094
1095 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1096 tbd = lp->tbds + lp->next_tx_cmd;
1097
1098 if (tx_cmd->cmd.command) {
1099 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1100 dev->name);
1101 dev->stats.tx_dropped++;
1102
1103 dev_kfree_skb(skb);
1104 } else {
1105 if (++lp->next_tx_cmd == TX_RING_SIZE)
1106 lp->next_tx_cmd = 0;
1107 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1108 tbd->next = I596_NULL;
1109
1110 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1111 tx_cmd->skb = skb;
1112
1113 tx_cmd->pad = 0;
1114 tx_cmd->size = 0;
1115 tbd->pad = 0;
1116 tbd->size = EOF | length;
1117
1118 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1119
1120#ifdef __mc68000__
1121 cache_push(virt_to_phys(skb->data), length);
1122#endif
1123 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1124 i596_add_cmd(dev, &tx_cmd->cmd);
1125
1126 dev->stats.tx_packets++;
1127 dev->stats.tx_bytes += length;
1128 }
1129
1130 netif_start_queue(dev);
1131
1132 return NETDEV_TX_OK;
1133}
1134
1135static void print_eth(unsigned char *add, char *str)
1136{
1137 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1138 add, add + 6, add, add[12], add[13], str);
1139}
1140
1141static int io = 0x300;
1142static int irq = 10;
1143
1144static const struct net_device_ops i596_netdev_ops = {
1145 .ndo_open = i596_open,
1146 .ndo_stop = i596_close,
1147 .ndo_start_xmit = i596_start_xmit,
1148 .ndo_set_multicast_list = set_multicast_list,
1149 .ndo_tx_timeout = i596_tx_timeout,
1150 .ndo_change_mtu = eth_change_mtu,
1151 .ndo_set_mac_address = eth_mac_addr,
1152 .ndo_validate_addr = eth_validate_addr,
1153};
1154
1155struct net_device * __init i82596_probe(int unit)
1156{
1157 struct net_device *dev;
1158 int i;
1159 struct i596_private *lp;
1160 char eth_addr[8];
1161 static int probed;
1162 int err;
1163
1164 if (probed)
1165 return ERR_PTR(-ENODEV);
1166 probed++;
1167
1168 dev = alloc_etherdev(0);
1169 if (!dev)
1170 return ERR_PTR(-ENOMEM);
1171
1172 if (unit >= 0) {
1173 sprintf(dev->name, "eth%d", unit);
1174 netdev_boot_setup_check(dev);
1175 } else {
1176 dev->base_addr = io;
1177 dev->irq = irq;
1178 }
1179
1180#ifdef ENABLE_MVME16x_NET
1181 if (MACH_IS_MVME16x) {
1182 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1183 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1184 err = -ENODEV;
1185 goto out;
1186 }
1187 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1188 dev->base_addr = MVME_I596_BASE;
1189 dev->irq = (unsigned) MVME16x_IRQ_I596;
1190 goto found;
1191 }
1192#endif
1193#ifdef ENABLE_BVME6000_NET
1194 if (MACH_IS_BVME6000) {
1195 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1196 unsigned char msr = rtc[3];
1197 int i;
1198
1199 rtc[3] |= 0x80;
1200 for (i = 0; i < 6; i++)
1201 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1202 rtc[3] = msr;
1203 dev->base_addr = BVME_I596_BASE;
1204 dev->irq = (unsigned) BVME_IRQ_I596;
1205 goto found;
1206 }
1207#endif
1208#ifdef ENABLE_APRICOT
1209 {
1210 int checksum = 0;
1211 int ioaddr = 0x300;
1212
1213 /* this is easy the ethernet interface can only be at 0x300 */
1214 /* first check nothing is already registered here */
1215
1216 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1217 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1218 err = -EBUSY;
1219 goto out;
1220 }
1221
1222 dev->base_addr = ioaddr;
1223
1224 for (i = 0; i < 8; i++) {
1225 eth_addr[i] = inb(ioaddr + 8 + i);
1226 checksum += eth_addr[i];
1227 }
1228
1229 /* checksum is a multiple of 0x100, got this wrong first time
1230 some machines have 0x100, some 0x200. The DOS driver doesn't
1231 even bother with the checksum.
1232 Some other boards trip the checksum.. but then appear as
1233 ether address 0. Trap these - AC */
1234
1235 if ((checksum % 0x100) ||
1236 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1237 err = -ENODEV;
1238 goto out1;
1239 }
1240
1241 dev->irq = 10;
1242 goto found;
1243 }
1244#endif
1245 err = -ENODEV;
1246 goto out;
1247
1248found:
1249 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1250 if (!dev->mem_start) {
1251 err = -ENOMEM;
1252 goto out1;
1253 }
1254
1255 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1256
1257 for (i = 0; i < 6; i++)
1258 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1259
1260 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1261
1262 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1263
1264 /* The 82596-specific entries in the device structure. */
1265 dev->netdev_ops = &i596_netdev_ops;
1266 dev->watchdog_timeo = TX_TIMEOUT;
1267
1268 dev->ml_priv = (void *)(dev->mem_start);
1269
1270 lp = dev->ml_priv;
1271 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1272 "lp->scb at 0x%08lx\n",
1273 dev->name, (unsigned long)lp,
1274 sizeof(struct i596_private), (unsigned long)&lp->scb));
1275 memset((void *) lp, 0, sizeof(struct i596_private));
1276
1277#ifdef __mc68000__
1278 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1279 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1280 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1281#endif
1282 lp->scb.command = 0;
1283 lp->scb.cmd = I596_NULL;
1284 lp->scb.rfd = I596_NULL;
1285 spin_lock_init(&lp->lock);
1286
1287 err = register_netdev(dev);
1288 if (err)
1289 goto out2;
1290 return dev;
1291out2:
1292#ifdef __mc68000__
1293 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1294 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1295 */
1296 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1297 IOMAP_FULL_CACHING);
1298#endif
1299 free_page ((u32)(dev->mem_start));
1300out1:
1301#ifdef ENABLE_APRICOT
1302 release_region(dev->base_addr, I596_TOTAL_SIZE);
1303#endif
1304out:
1305 free_netdev(dev);
1306 return ERR_PTR(err);
1307}
1308
1309static irqreturn_t i596_interrupt(int irq, void *dev_id)
1310{
1311 struct net_device *dev = dev_id;
1312 struct i596_private *lp;
1313 short ioaddr;
1314 unsigned short status, ack_cmd = 0;
1315 int handled = 0;
1316
1317#ifdef ENABLE_BVME6000_NET
1318 if (MACH_IS_BVME6000) {
1319 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1320 i596_error(irq, dev_id);
1321 return IRQ_HANDLED;
1322 }
1323 }
1324#endif
1325 if (dev == NULL) {
1326 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1327 return IRQ_NONE;
1328 }
1329
1330 ioaddr = dev->base_addr;
1331 lp = dev->ml_priv;
1332
1333 spin_lock (&lp->lock);
1334
1335 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1336 status = lp->scb.status;
1337
1338 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1339 dev->name, irq, status));
1340
1341 ack_cmd = status & 0xf000;
1342
1343 if ((status & 0x8000) || (status & 0x2000)) {
1344 struct i596_cmd *ptr;
1345
1346 handled = 1;
1347 if ((status & 0x8000))
1348 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1349 if ((status & 0x2000))
1350 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1351
1352 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1353 ptr = lp->cmd_head;
1354
1355 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1356 lp->cmd_head->status, lp->cmd_head->command));
1357 lp->cmd_head = ptr->v_next;
1358 lp->cmd_backlog--;
1359
1360 switch ((ptr->command) & 0x7) {
1361 case CmdTx:
1362 {
1363 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1364 struct sk_buff *skb = tx_cmd->skb;
1365
1366 if ((ptr->status) & STAT_OK) {
1367 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1368 } else {
1369 dev->stats.tx_errors++;
1370 if ((ptr->status) & 0x0020)
1371 dev->stats.collisions++;
1372 if (!((ptr->status) & 0x0040))
1373 dev->stats.tx_heartbeat_errors++;
1374 if ((ptr->status) & 0x0400)
1375 dev->stats.tx_carrier_errors++;
1376 if ((ptr->status) & 0x0800)
1377 dev->stats.collisions++;
1378 if ((ptr->status) & 0x1000)
1379 dev->stats.tx_aborted_errors++;
1380 }
1381
1382 dev_kfree_skb_irq(skb);
1383
1384 tx_cmd->cmd.command = 0; /* Mark free */
1385 break;
1386 }
1387 case CmdTDR:
1388 {
1389 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1390
1391 if (status & 0x8000) {
1392 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1393 } else {
1394 if (status & 0x4000)
1395 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1396 if (status & 0x2000)
1397 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1398 if (status & 0x1000)
1399 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1400
1401 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1402 }
1403 break;
1404 }
1405 case CmdConfigure:
1406 case CmdMulticastList:
1407 /* Zap command so set_multicast_list() knows it is free */
1408 ptr->command = 0;
1409 break;
1410 }
1411 ptr->v_next = ptr->b_next = I596_NULL;
1412 lp->last_cmd = jiffies;
1413 }
1414
1415 ptr = lp->cmd_head;
1416 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1417 ptr->command &= 0x1fff;
1418 ptr = ptr->v_next;
1419 }
1420
1421 if ((lp->cmd_head != I596_NULL))
1422 ack_cmd |= CUC_START;
1423 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1424 }
1425 if ((status & 0x1000) || (status & 0x4000)) {
1426 if ((status & 0x4000))
1427 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1428 i596_rx(dev);
1429 /* Only RX_START if stopped - RGH 07-07-96 */
1430 if (status & 0x1000) {
1431 if (netif_running(dev)) {
1432 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1433 ack_cmd |= RX_START;
1434 dev->stats.rx_errors++;
1435 dev->stats.rx_fifo_errors++;
1436 rebuild_rx_bufs(dev);
1437 }
1438 }
1439 }
1440 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1441 lp->scb.command = ack_cmd;
1442
1443#ifdef ENABLE_MVME16x_NET
1444 if (MACH_IS_MVME16x) {
1445 /* Ack the interrupt */
1446
1447 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1448
1449 pcc2[0x2a] |= 0x08;
1450 }
1451#endif
1452#ifdef ENABLE_BVME6000_NET
1453 if (MACH_IS_BVME6000) {
1454 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1455
1456 *ethirq = 1;
1457 *ethirq = 3;
1458 }
1459#endif
1460#ifdef ENABLE_APRICOT
1461 (void) inb(ioaddr + 0x10);
1462 outb(4, ioaddr + 0xf);
1463#endif
1464 CA(dev);
1465
1466 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1467
1468 spin_unlock (&lp->lock);
1469 return IRQ_RETVAL(handled);
1470}
1471
1472static int i596_close(struct net_device *dev)
1473{
1474 struct i596_private *lp = dev->ml_priv;
1475 unsigned long flags;
1476
1477 netif_stop_queue(dev);
1478
1479 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1480 dev->name, lp->scb.status));
1481
1482 spin_lock_irqsave(&lp->lock, flags);
1483
1484 wait_cmd(dev,lp,100,"close1 timed out");
1485 lp->scb.command = CUC_ABORT | RX_ABORT;
1486 CA(dev);
1487
1488 wait_cmd(dev,lp,100,"close2 timed out");
1489
1490 spin_unlock_irqrestore(&lp->lock, flags);
1491 DEB(DEB_STRUCT,i596_display_data(dev));
1492 i596_cleanup_cmd(dev,lp);
1493
1494#ifdef ENABLE_MVME16x_NET
1495 if (MACH_IS_MVME16x) {
1496 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1497
1498 /* Disable all ints */
1499 pcc2[0x28] = 1;
1500 pcc2[0x2a] = 0x40;
1501 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1502 }
1503#endif
1504#ifdef ENABLE_BVME6000_NET
1505 if (MACH_IS_BVME6000) {
1506 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1507
1508 *ethirq = 1;
1509 }
1510#endif
1511
1512#ifdef ENABLE_MVME16x_NET
1513 free_irq(0x56, dev);
1514#endif
1515 free_irq(dev->irq, dev);
1516 remove_rx_bufs(dev);
1517
1518 return 0;
1519}
1520
1521/*
1522 * Set or clear the multicast filter for this adaptor.
1523 */
1524
1525static void set_multicast_list(struct net_device *dev)
1526{
1527 struct i596_private *lp = dev->ml_priv;
1528 int config = 0, cnt;
1529
1530 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1531 dev->name, netdev_mc_count(dev),
1532 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1533 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1534
1535 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1536 return;
1537
1538 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1539 lp->cf_cmd.i596_config[8] |= 0x01;
1540 config = 1;
1541 }
1542 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1543 lp->cf_cmd.i596_config[8] &= ~0x01;
1544 config = 1;
1545 }
1546 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1547 lp->cf_cmd.i596_config[11] &= ~0x20;
1548 config = 1;
1549 }
1550 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1551 lp->cf_cmd.i596_config[11] |= 0x20;
1552 config = 1;
1553 }
1554 if (config) {
1555 lp->cf_cmd.cmd.command = CmdConfigure;
1556 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1557 }
1558
1559 cnt = netdev_mc_count(dev);
1560 if (cnt > MAX_MC_CNT)
1561 {
1562 cnt = MAX_MC_CNT;
1563 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1564 dev->name, cnt);
1565 }
1566
1567 if (!netdev_mc_empty(dev)) {
1568 struct netdev_hw_addr *ha;
1569 unsigned char *cp;
1570 struct mc_cmd *cmd;
1571
1572 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1573 return;
1574 cmd = &lp->mc_cmd;
1575 cmd->cmd.command = CmdMulticastList;
1576 cmd->mc_cnt = cnt * ETH_ALEN;
1577 cp = cmd->mc_addrs;
1578 netdev_for_each_mc_addr(ha, dev) {
1579 if (!cnt--)
1580 break;
1581 memcpy(cp, ha->addr, ETH_ALEN);
1582 if (i596_debug > 1)
1583 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1584 dev->name, cp));
1585 cp += ETH_ALEN;
1586 }
1587 i596_add_cmd(dev, &cmd->cmd);
1588 }
1589}
1590
1591#ifdef MODULE
1592static struct net_device *dev_82596;
1593
1594#ifdef ENABLE_APRICOT
1595module_param(irq, int, 0);
1596MODULE_PARM_DESC(irq, "Apricot IRQ number");
1597#endif
1598
1599static int debug = -1;
1600module_param(debug, int, 0);
1601MODULE_PARM_DESC(debug, "i82596 debug mask");
1602
1603int __init init_module(void)
1604{
1605 if (debug >= 0)
1606 i596_debug = debug;
1607 dev_82596 = i82596_probe(-1);
1608 if (IS_ERR(dev_82596))
1609 return PTR_ERR(dev_82596);
1610 return 0;
1611}
1612
1613void __exit cleanup_module(void)
1614{
1615 unregister_netdev(dev_82596);
1616#ifdef __mc68000__
1617 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1618 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1619 */
1620
1621 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1622 IOMAP_FULL_CACHING);
1623#endif
1624 free_page ((u32)(dev_82596->mem_start));
1625#ifdef ENABLE_APRICOT
1626 /* If we don't do this, we can't re-insmod it later. */
1627 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1628#endif
1629 free_netdev(dev_82596);
1630}
1631
1632#endif /* MODULE */