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[linux-2.6/linux-mips.git] / drivers / net / 82596.c
blob30e52920c91e074ede99e4e289da75a5d2f1526c
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
43 #include <linux/config.h>
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/string.h>
47 #include <linux/errno.h>
48 #include <linux/ioport.h>
49 #include <linux/slab.h>
50 #include <linux/interrupt.h>
51 #include <linux/delay.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/skbuff.h>
55 #include <linux/init.h>
56
57 #include <asm/bitops.h>
58 #include <asm/io.h>
59 #include <asm/dma.h>
60 #include <asm/pgtable.h>
61 #include <asm/pgalloc.h>
62
63 static char version[] __initdata =
64 "82596.c $Revision: 1.5 $\n";
65
66 /* DEBUG flags
67 */
68
69 #define DEB_INIT 0x0001
70 #define DEB_PROBE 0x0002
71 #define DEB_SERIOUS 0x0004
72 #define DEB_ERRORS 0x0008
73 #define DEB_MULTI 0x0010
74 #define DEB_TDR 0x0020
75 #define DEB_OPEN 0x0040
76 #define DEB_RESET 0x0080
77 #define DEB_ADDCMD 0x0100
78 #define DEB_STATUS 0x0200
79 #define DEB_STARTTX 0x0400
80 #define DEB_RXADDR 0x0800
81 #define DEB_TXADDR 0x1000
82 #define DEB_RXFRAME 0x2000
83 #define DEB_INTS 0x4000
84 #define DEB_STRUCT 0x8000
85 #define DEB_ANY 0xffff
86
87
88 #define DEB(x,y) if (i596_debug & (x)) y
89
90
91 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
92 #define ENABLE_MVME16x_NET
93 #endif
94 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
95 #define ENABLE_BVME6000_NET
96 #endif
97 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
98 #define ENABLE_APRICOT
99 #endif
100
101 #ifdef ENABLE_MVME16x_NET
102 #include <asm/mvme16xhw.h>
103 #endif
104 #ifdef ENABLE_BVME6000_NET
105 #include <asm/bvme6000hw.h>
106 #endif
107
108 /*
109 * Define various macros for Channel Attention, word swapping etc., dependent
110 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
111 */
112
113 #ifdef __mc68000__
114 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
115 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
120 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
121 #define ISCP_BUSY 0x00010000
122 #define MACH_IS_APRICOT 0
123 #else
124 #define WSWAPrfd(x) ((struct i596_rfd *)(x))
125 #define WSWAPrbd(x) ((struct i596_rbd *)(x))
126 #define WSWAPiscp(x) ((struct i596_iscp *)(x))
127 #define WSWAPscb(x) ((struct i596_scb *)(x))
128 #define WSWAPcmd(x) ((struct i596_cmd *)(x))
129 #define WSWAPtbd(x) ((struct i596_tbd *)(x))
130 #define WSWAPchar(x) ((char *)(x))
131 #define ISCP_BUSY 0x0001
132 #define MACH_IS_APRICOT 1
133 #endif
134
135 /*
136 * The MPU_PORT command allows direct access to the 82596. With PORT access
137 * the following commands are available (p5-18). The 32-bit port command
138 * must be word-swapped with the most significant word written first.
139 * This only applies to VME boards.
140 */
141 #define PORT_RESET 0x00 /* reset 82596 */
142 #define PORT_SELFTEST 0x01 /* selftest */
143 #define PORT_ALTSCP 0x02 /* alternate SCB address */
144 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
145
146 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
147
148 MODULE_AUTHOR("Richard Hirst");
149 MODULE_DESCRIPTION("i82596 driver");
150 MODULE_LICENSE("GPL");
151
152 MODULE_PARM(i596_debug, "i");
153 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
154
155
156 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
157 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
158 */
159 static int rx_copybreak = 100;
160
161 #define PKT_BUF_SZ 1536
162 #define MAX_MC_CNT 64
163
164 #define I596_TOTAL_SIZE 17
165
166 #define I596_NULL ((void *)0xffffffff)
167
168 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
169 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
170 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
171
172 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
173
174 enum commands {
175 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
176 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
177 };
178
179 #define STAT_C 0x8000 /* Set to 0 after execution */
180 #define STAT_B 0x4000 /* Command being executed */
181 #define STAT_OK 0x2000 /* Command executed ok */
182 #define STAT_A 0x1000 /* Command aborted */
183
184 #define CUC_START 0x0100
185 #define CUC_RESUME 0x0200
186 #define CUC_SUSPEND 0x0300
187 #define CUC_ABORT 0x0400
188 #define RX_START 0x0010
189 #define RX_RESUME 0x0020
190 #define RX_SUSPEND 0x0030
191 #define RX_ABORT 0x0040
192
193 #define TX_TIMEOUT 5
194
195
196 struct i596_reg {
197 unsigned short porthi;
198 unsigned short portlo;
199 unsigned long ca;
200 };
201
202 #define EOF 0x8000
203 #define SIZE_MASK 0x3fff
204
205 struct i596_tbd {
206 unsigned short size;
207 unsigned short pad;
208 struct i596_tbd *next;
209 char *data;
210 };
211
212 /* The command structure has two 'next' pointers; v_next is the address of
213 * the next command as seen by the CPU, b_next is the address of the next
214 * command as seen by the 82596. The b_next pointer, as used by the 82596
215 * always references the status field of the next command, rather than the
216 * v_next field, because the 82596 is unaware of v_next. It may seem more
217 * logical to put v_next at the end of the structure, but we cannot do that
218 * because the 82596 expects other fields to be there, depending on command
219 * type.
220 */
221
222 struct i596_cmd {
223 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
224 unsigned short status;
225 unsigned short command;
226 struct i596_cmd *b_next; /* Address from i596 viewpoint */
227 };
228
229 struct tx_cmd {
230 struct i596_cmd cmd;
231 struct i596_tbd *tbd;
232 unsigned short size;
233 unsigned short pad;
234 struct sk_buff *skb; /* So we can free it after tx */
235 };
236
237 struct tdr_cmd {
238 struct i596_cmd cmd;
239 unsigned short status;
240 unsigned short pad;
241 };
242
243 struct mc_cmd {
244 struct i596_cmd cmd;
245 short mc_cnt;
246 char mc_addrs[MAX_MC_CNT*6];
247 };
248
249 struct sa_cmd {
250 struct i596_cmd cmd;
251 char eth_addr[8];
252 };
253
254 struct cf_cmd {
255 struct i596_cmd cmd;
256 char i596_config[16];
257 };
258
259 struct i596_rfd {
260 unsigned short stat;
261 unsigned short cmd;
262 struct i596_rfd *b_next; /* Address from i596 viewpoint */
263 struct i596_rbd *rbd;
264 unsigned short count;
265 unsigned short size;
266 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
267 struct i596_rfd *v_prev;
268 };
269
270 struct i596_rbd {
271 unsigned short count;
272 unsigned short zero1;
273 struct i596_rbd *b_next;
274 unsigned char *b_data; /* Address from i596 viewpoint */
275 unsigned short size;
276 unsigned short zero2;
277 struct sk_buff *skb;
278 struct i596_rbd *v_next;
279 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
280 unsigned char *v_data; /* Address from CPUs viewpoint */
281 };
282
283 #define TX_RING_SIZE 64
284 #define RX_RING_SIZE 16
285
286 struct i596_scb {
287 unsigned short status;
288 unsigned short command;
289 struct i596_cmd *cmd;
290 struct i596_rfd *rfd;
291 unsigned long crc_err;
292 unsigned long align_err;
293 unsigned long resource_err;
294 unsigned long over_err;
295 unsigned long rcvdt_err;
296 unsigned long short_err;
297 unsigned short t_on;
298 unsigned short t_off;
299 };
300
301 struct i596_iscp {
302 unsigned long stat;
303 struct i596_scb *scb;
304 };
305
306 struct i596_scp {
307 unsigned long sysbus;
308 unsigned long pad;
309 struct i596_iscp *iscp;
310 };
311
312 struct i596_private {
313 volatile struct i596_scp scp;
314 volatile struct i596_iscp iscp;
315 volatile struct i596_scb scb;
316 struct sa_cmd sa_cmd;
317 struct cf_cmd cf_cmd;
318 struct tdr_cmd tdr_cmd;
319 struct mc_cmd mc_cmd;
320 unsigned long stat;
321 int last_restart __attribute__((aligned(4)));
322 struct i596_rfd *rfd_head;
323 struct i596_rbd *rbd_head;
324 struct i596_cmd *cmd_tail;
325 struct i596_cmd *cmd_head;
326 int cmd_backlog;
327 unsigned long last_cmd;
328 struct net_device_stats stats;
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
337 static 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
358 static int i596_open(struct net_device *dev);
359 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
360 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
361 static int i596_close(struct net_device *dev);
362 static struct net_device_stats *i596_get_stats(struct net_device *dev);
363 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
364 static void i596_tx_timeout (struct net_device *dev);
365 static void print_eth(unsigned char *buf, char *str);
366 static void set_multicast_list(struct net_device *dev);
367
368 static int rx_ring_size = RX_RING_SIZE;
369 static int ticks_limit = 25;
370 static int max_cmd_backlog = TX_RING_SIZE-1;
371
372
373 static inline void CA(struct net_device *dev)
374 {
375 #ifdef ENABLE_MVME16x_NET
376 if (MACH_IS_MVME16x) {
377 ((struct i596_reg *) dev->base_addr)->ca = 1;
378 }
379 #endif
380 #ifdef ENABLE_BVME6000_NET
381 if (MACH_IS_BVME6000) {
382 volatile u32 i;
383
384 i = *(volatile u32 *) (dev->base_addr);
385 }
386 #endif
387 #ifdef ENABLE_APRICOT
388 if (MACH_IS_APRICOT) {
389 outw(0, (short) (dev->base_addr) + 4);
390 }
391 #endif
392 }
393
394
395 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
396 {
397 #ifdef ENABLE_MVME16x_NET
398 if (MACH_IS_MVME16x) {
399 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
400 p->porthi = ((c) | (u32) (x)) & 0xffff;
401 p->portlo = ((c) | (u32) (x)) >> 16;
402 }
403 #endif
404 #ifdef ENABLE_BVME6000_NET
405 if (MACH_IS_BVME6000) {
406 u32 v = (u32) (c) | (u32) (x);
407 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
408 *(volatile u32 *) dev->base_addr = v;
409 udelay(1);
410 *(volatile u32 *) dev->base_addr = v;
411 }
412 #endif
413 }
414
415
416 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
417 {
418 while (--delcnt && lp->iscp.stat)
419 udelay(10);
420 if (!delcnt) {
421 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
422 dev->name, str, lp->scb.status, lp->scb.command);
423 return -1;
424 }
425 else
426 return 0;
427 }
428
429
430 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
431 {
432 while (--delcnt && lp->scb.command)
433 udelay(10);
434 if (!delcnt) {
435 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
436 dev->name, str, lp->scb.status, lp->scb.command);
437 return -1;
438 }
439 else
440 return 0;
441 }
442
443
444 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
445 {
446 volatile struct i596_cmd *c = cmd;
447
448 while (--delcnt && c->command)
449 udelay(10);
450 if (!delcnt) {
451 printk(KERN_ERR "%s: %s.\n", dev->name, str);
452 return -1;
453 }
454 else
455 return 0;
456 }
457
458
459 static void i596_display_data(struct net_device *dev)
460 {
461 struct i596_private *lp = (struct i596_private *) dev->priv;
462 struct i596_cmd *cmd;
463 struct i596_rfd *rfd;
464 struct i596_rbd *rbd;
465
466 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
467 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
468 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
469 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
470 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
471 " .cmd = %p, .rfd = %p\n",
472 &lp->scb, lp->scb.status, lp->scb.command,
473 lp->scb.cmd, lp->scb.rfd);
474 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
475 " over %lx, rcvdt %lx, short %lx\n",
476 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
477 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
478 cmd = lp->cmd_head;
479 while (cmd != I596_NULL) {
480 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
481 cmd, cmd->status, cmd->command, cmd->b_next);
482 cmd = cmd->v_next;
483 }
484 rfd = lp->rfd_head;
485 printk(KERN_ERR "rfd_head = %p\n", rfd);
486 do {
487 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
488 " count %04x\n",
489 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
490 rfd->count);
491 rfd = rfd->v_next;
492 } while (rfd != lp->rfd_head);
493 rbd = lp->rbd_head;
494 printk(KERN_ERR "rbd_head = %p\n", rbd);
495 do {
496 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
497 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
498 rbd = rbd->v_next;
499 } while (rbd != lp->rbd_head);
500 }
501
502
503 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
504 static irqreturn_t i596_error(int irq, void *dev_id, struct pt_regs *regs)
505 {
506 struct net_device *dev = dev_id;
507 #ifdef ENABLE_MVME16x_NET
508 if (MACH_IS_MVME16x) {
509 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
510
511 pcc2[0x28] = 1;
512 pcc2[0x2b] = 0x1d;
513 }
514 #endif
515 #ifdef ENABLE_BVME6000_NET
516 if (MACH_IS_BVME6000) {
517 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
518
519 *ethirq = 1;
520 *ethirq = 3;
521 }
522 #endif
523 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
524 i596_display_data(dev);
525 return IRQ_HANDLED;
526 }
527 #endif
528
529 static inline void init_rx_bufs(struct net_device *dev)
530 {
531 struct i596_private *lp = (struct i596_private *)dev->priv;
532 int i;
533 struct i596_rfd *rfd;
534 struct i596_rbd *rbd;
535
536 /* First build the Receive Buffer Descriptor List */
537
538 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
539 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
540
541 if (skb == NULL)
542 panic("82596: alloc_skb() failed");
543 skb->dev = dev;
544 rbd->v_next = rbd+1;
545 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
546 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
547 rbd->skb = skb;
548 rbd->v_data = skb->tail;
549 rbd->b_data = WSWAPchar(virt_to_bus(skb->tail));
550 rbd->size = PKT_BUF_SZ;
551 #ifdef __mc68000__
552 cache_clear(virt_to_phys(skb->tail), PKT_BUF_SZ);
553 #endif
554 }
555 lp->rbd_head = lp->rbds;
556 rbd = lp->rbds + rx_ring_size - 1;
557 rbd->v_next = lp->rbds;
558 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
559
560 /* Now build the Receive Frame Descriptor List */
561
562 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
563 rfd->rbd = I596_NULL;
564 rfd->v_next = rfd+1;
565 rfd->v_prev = rfd-1;
566 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
567 rfd->cmd = CMD_FLEX;
568 }
569 lp->rfd_head = lp->rfds;
570 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
571 rfd = lp->rfds;
572 rfd->rbd = lp->rbd_head;
573 rfd->v_prev = lp->rfds + rx_ring_size - 1;
574 rfd = lp->rfds + rx_ring_size - 1;
575 rfd->v_next = lp->rfds;
576 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
577 rfd->cmd = CMD_EOL|CMD_FLEX;
578 }
579
580 static inline void remove_rx_bufs(struct net_device *dev)
581 {
582 struct i596_private *lp = (struct i596_private *)dev->priv;
583 struct i596_rbd *rbd;
584 int i;
585
586 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
587 if (rbd->skb == NULL)
588 break;
589 dev_kfree_skb(rbd->skb);
590 }
591 }
592
593
594 static void rebuild_rx_bufs(struct net_device *dev)
595 {
596 struct i596_private *lp = (struct i596_private *) dev->priv;
597 int i;
598
599 /* Ensure rx frame/buffer descriptors are tidy */
600
601 for (i = 0; i < rx_ring_size; i++) {
602 lp->rfds[i].rbd = I596_NULL;
603 lp->rfds[i].cmd = CMD_FLEX;
604 }
605 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
606 lp->rfd_head = lp->rfds;
607 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
608 lp->rbd_head = lp->rbds;
609 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
610 }
611
612
613 static int init_i596_mem(struct net_device *dev)
614 {
615 struct i596_private *lp = (struct i596_private *) dev->priv;
616 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET)
617 short ioaddr = dev->base_addr;
618 #endif
619 unsigned long flags;
620
621 MPU_PORT(dev, PORT_RESET, 0);
622
623 udelay(100); /* Wait 100us - seems to help */
624
625 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
626 #ifdef ENABLE_MVME16x_NET
627 if (MACH_IS_MVME16x) {
628 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
629
630 /* Disable all ints for now */
631 pcc2[0x28] = 1;
632 pcc2[0x2a] = 0x48;
633 /* Following disables snooping. Snooping is not required
634 * as we make appropriate use of non-cached pages for
635 * shared data, and cache_push/cache_clear.
636 */
637 pcc2[0x2b] = 0x08;
638 }
639 #endif
640 #ifdef ENABLE_BVME6000_NET
641 if (MACH_IS_BVME6000) {
642 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
643
644 *ethirq = 1;
645 }
646 #endif
647
648 /* change the scp address */
649
650 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
651
652 #elif defined(ENABLE_APRICOT)
653
654 {
655 u32 scp = virt_to_bus(&lp->scp);
656
657 /* change the scp address */
658 outw(0, ioaddr);
659 outw(0, ioaddr);
660 outb(4, ioaddr + 0xf);
661 outw(scp | 2, ioaddr);
662 outw(scp >> 16, ioaddr);
663 }
664 #endif
665
666 lp->last_cmd = jiffies;
667
668 #ifdef ENABLE_MVME16x_NET
669 if (MACH_IS_MVME16x)
670 lp->scp.sysbus = 0x00000054;
671 #endif
672 #ifdef ENABLE_BVME6000_NET
673 if (MACH_IS_BVME6000)
674 lp->scp.sysbus = 0x0000004c;
675 #endif
676 #ifdef ENABLE_APRICOT
677 if (MACH_IS_APRICOT)
678 lp->scp.sysbus = 0x00440000;
679 #endif
680
681 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
682 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
683 lp->iscp.stat = ISCP_BUSY;
684 lp->cmd_backlog = 0;
685
686 lp->cmd_head = lp->scb.cmd = I596_NULL;
687
688 #ifdef ENABLE_BVME6000_NET
689 if (MACH_IS_BVME6000) {
690 lp->scb.t_on = 7 * 25;
691 lp->scb.t_off = 1 * 25;
692 }
693 #endif
694
695 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
696
697 #if defined(ENABLE_APRICOT)
698 (void) inb(ioaddr + 0x10);
699 outb(4, ioaddr + 0xf);
700 #endif
701 CA(dev);
702
703 if (wait_istat(dev,lp,1000,"initialization timed out"))
704 goto failed;
705 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
706
707 /* Ensure rx frame/buffer descriptors are tidy */
708 rebuild_rx_bufs(dev);
709 lp->scb.command = 0;
710
711 #ifdef ENABLE_MVME16x_NET
712 if (MACH_IS_MVME16x) {
713 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
714
715 /* Enable ints, etc. now */
716 pcc2[0x2a] = 0x55; /* Edge sensitive */
717 pcc2[0x2b] = 0x15;
718 }
719 #endif
720 #ifdef ENABLE_BVME6000_NET
721 if (MACH_IS_BVME6000) {
722 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
723
724 *ethirq = 3;
725 }
726 #endif
727
728
729 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
730 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
731 lp->cf_cmd.cmd.command = CmdConfigure;
732 i596_add_cmd(dev, &lp->cf_cmd.cmd);
733
734 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
735 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
736 lp->sa_cmd.cmd.command = CmdSASetup;
737 i596_add_cmd(dev, &lp->sa_cmd.cmd);
738
739 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
740 lp->tdr_cmd.cmd.command = CmdTDR;
741 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
742
743 spin_lock_irqsave (&lp->lock, flags);
744
745 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
746 spin_unlock_irqrestore (&lp->lock, flags);
747 goto failed;
748 }
749 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
750 lp->scb.command = RX_START;
751 CA(dev);
752
753 spin_unlock_irqrestore (&lp->lock, flags);
754
755 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
756 goto failed;
757 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
758 return 0;
759
760 failed:
761 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
762 MPU_PORT(dev, PORT_RESET, 0);
763 return -1;
764 }
765
766 static inline int i596_rx(struct net_device *dev)
767 {
768 struct i596_private *lp = (struct i596_private *)dev->priv;
769 struct i596_rfd *rfd;
770 struct i596_rbd *rbd;
771 int frames = 0;
772
773 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
774 lp->rfd_head, lp->rbd_head));
775
776 rfd = lp->rfd_head; /* Ref next frame to check */
777
778 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
779 if (rfd->rbd == I596_NULL)
780 rbd = I596_NULL;
781 else if (rfd->rbd == lp->rbd_head->b_addr)
782 rbd = lp->rbd_head;
783 else {
784 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
785 /* XXX Now what? */
786 rbd = I596_NULL;
787 }
788 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
789 rfd, rfd->rbd, rfd->stat));
790
791 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
792 /* a good frame */
793 int pkt_len = rbd->count & 0x3fff;
794 struct sk_buff *skb = rbd->skb;
795 int rx_in_place = 0;
796
797 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
798 frames++;
799
800 /* Check if the packet is long enough to just accept
801 * without copying to a properly sized skbuff.
802 */
803
804 if (pkt_len > rx_copybreak) {
805 struct sk_buff *newskb;
806
807 /* Get fresh skbuff to replace filled one. */
808 newskb = dev_alloc_skb(PKT_BUF_SZ);
809 if (newskb == NULL) {
810 skb = NULL; /* drop pkt */
811 goto memory_squeeze;
812 }
813 /* Pass up the skb already on the Rx ring. */
814 skb_put(skb, pkt_len);
815 rx_in_place = 1;
816 rbd->skb = newskb;
817 newskb->dev = dev;
818 rbd->v_data = newskb->tail;
819 rbd->b_data = WSWAPchar(virt_to_bus(newskb->tail));
820 #ifdef __mc68000__
821 cache_clear(virt_to_phys(newskb->tail), PKT_BUF_SZ);
822 #endif
823 }
824 else
825 skb = dev_alloc_skb(pkt_len + 2);
826 memory_squeeze:
827 if (skb == NULL) {
828 /* XXX tulip.c can defer packets here!! */
829 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
830 lp->stats.rx_dropped++;
831 }
832 else {
833 skb->dev = dev;
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__
842 cache_clear(virt_to_phys(rbd->skb->tail),
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
902 static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
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
935 static inline void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr)
936 {
937 unsigned long flags;
938
939 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
940
941 spin_lock_irqsave (&lp->lock, flags);
942
943 wait_cmd(dev,lp,100,"i596_reset timed out");
944
945 netif_stop_queue(dev);
946
947 lp->scb.command = CUC_ABORT | RX_ABORT;
948 CA(dev);
949
950 /* wait for shutdown */
951 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
952 spin_unlock_irqrestore (&lp->lock, flags);
953
954 i596_cleanup_cmd(dev,lp);
955 i596_rx(dev);
956
957 netif_start_queue(dev);
958 init_i596_mem(dev);
959 }
960
961 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
962 {
963 struct i596_private *lp = (struct i596_private *) dev->priv;
964 int ioaddr = dev->base_addr;
965 unsigned long flags;
966
967 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
968
969 cmd->status = 0;
970 cmd->command |= (CMD_EOL | CMD_INTR);
971 cmd->v_next = cmd->b_next = I596_NULL;
972
973 spin_lock_irqsave (&lp->lock, flags);
974
975 if (lp->cmd_head != I596_NULL) {
976 lp->cmd_tail->v_next = cmd;
977 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
978 } else {
979 lp->cmd_head = cmd;
980 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
981 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
982 lp->scb.command = CUC_START;
983 CA(dev);
984 }
985 lp->cmd_tail = cmd;
986 lp->cmd_backlog++;
987
988 spin_unlock_irqrestore (&lp->lock, flags);
989
990 if (lp->cmd_backlog > max_cmd_backlog) {
991 unsigned long tickssofar = jiffies - lp->last_cmd;
992
993 if (tickssofar < ticks_limit)
994 return;
995
996 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
997
998 i596_reset(dev, lp, ioaddr);
999 }
1000 }
1001
1002 static int i596_open(struct net_device *dev)
1003 {
1004 int res = 0;
1005
1006 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1007
1008 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1009 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1010 return -EAGAIN;
1011 }
1012 #ifdef ENABLE_MVME16x_NET
1013 if (MACH_IS_MVME16x) {
1014 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1015 return -EAGAIN;
1016 }
1017 #endif
1018 init_rx_bufs(dev);
1019
1020 netif_start_queue(dev);
1021
1022 /* Initialize the 82596 memory */
1023 if (init_i596_mem(dev)) {
1024 res = -EAGAIN;
1025 free_irq(dev->irq, dev);
1026 }
1027
1028 return res;
1029 }
1030
1031 static void i596_tx_timeout (struct net_device *dev)
1032 {
1033 struct i596_private *lp = (struct i596_private *) dev->priv;
1034 int ioaddr = dev->base_addr;
1035
1036 /* Transmitter timeout, serious problems. */
1037 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1038 dev->name));
1039
1040 lp->stats.tx_errors++;
1041
1042 /* Try to restart the adaptor */
1043 if (lp->last_restart == lp->stats.tx_packets) {
1044 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1045 /* Shutdown and restart */
1046 i596_reset (dev, lp, ioaddr);
1047 } else {
1048 /* Issue a channel attention signal */
1049 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1050 lp->scb.command = CUC_START | RX_START;
1051 CA (dev);
1052 lp->last_restart = lp->stats.tx_packets;
1053 }
1054
1055 dev->trans_start = jiffies;
1056 netif_wake_queue (dev);
1057 }
1058
1059
1060 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1061 {
1062 struct i596_private *lp = (struct i596_private *) dev->priv;
1063 struct tx_cmd *tx_cmd;
1064 struct i596_tbd *tbd;
1065 short length = skb->len;
1066 dev->trans_start = jiffies;
1067
1068 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%x) called\n", dev->name,
1069 skb->len, (unsigned int)skb->data));
1070
1071 if (skb->len < ETH_ZLEN) {
1072 skb = skb_padto(skb, ETH_ZLEN);
1073 if (skb == NULL)
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
1119 static 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
1132 int __init i82596_probe(struct net_device *dev)
1133 {
1134 int i;
1135 struct i596_private *lp;
1136 char eth_addr[8];
1137 static int probed;
1138
1139 if (probed)
1140 return -ENODEV;
1141 probed++;
1142 #ifdef ENABLE_MVME16x_NET
1143 if (MACH_IS_MVME16x) {
1144 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1145 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1146 return -ENODEV;
1147 }
1148 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1149 dev->base_addr = MVME_I596_BASE;
1150 dev->irq = (unsigned) MVME16x_IRQ_I596;
1151 }
1152 #endif
1153 #ifdef ENABLE_BVME6000_NET
1154 if (MACH_IS_BVME6000) {
1155 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1156 unsigned char msr = rtc[3];
1157 int i;
1158
1159 rtc[3] |= 0x80;
1160 for (i = 0; i < 6; i++)
1161 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1162 rtc[3] = msr;
1163 dev->base_addr = BVME_I596_BASE;
1164 dev->irq = (unsigned) BVME_IRQ_I596;
1165 }
1166 #endif
1167 #ifdef ENABLE_APRICOT
1168 {
1169 int checksum = 0;
1170 int ioaddr = 0x300;
1171
1172 /* this is easy the ethernet interface can only be at 0x300 */
1173 /* first check nothing is already registered here */
1174
1175 if (!request_region(ioaddr, I596_TOTAL_SIZE, dev->name)) {
1176 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1177 return -EBUSY;
1178 }
1179
1180 for (i = 0; i < 8; i++) {
1181 eth_addr[i] = inb(ioaddr + 8 + i);
1182 checksum += eth_addr[i];
1183 }
1184
1185 /* checksum is a multiple of 0x100, got this wrong first time
1186 some machines have 0x100, some 0x200. The DOS driver doesn't
1187 even bother with the checksum.
1188 Some other boards trip the checksum.. but then appear as
1189 ether address 0. Trap these - AC */
1190
1191 if ((checksum % 0x100) ||
1192 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1193 release_region(ioaddr, I596_TOTAL_SIZE);
1194 return -ENODEV;
1195 }
1196
1197 dev->base_addr = ioaddr;
1198 dev->irq = 10;
1199 }
1200 #endif
1201 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1202 if (!dev->mem_start) {
1203 #ifdef ENABLE_APRICOT
1204 release_region(dev->base_addr, I596_TOTAL_SIZE);
1205 #endif
1206 return -ENOMEM;
1207 }
1208
1209 ether_setup(dev);
1210 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1211
1212 for (i = 0; i < 6; i++)
1213 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1214
1215 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1216
1217 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1218
1219 /* The 82596-specific entries in the device structure. */
1220 SET_MODULE_OWNER(dev);
1221 dev->open = i596_open;
1222 dev->stop = i596_close;
1223 dev->hard_start_xmit = i596_start_xmit;
1224 dev->get_stats = i596_get_stats;
1225 dev->set_multicast_list = set_multicast_list;
1226 dev->tx_timeout = i596_tx_timeout;
1227 dev->watchdog_timeo = TX_TIMEOUT;
1228
1229 dev->priv = (void *)(dev->mem_start);
1230
1231 lp = (struct i596_private *) dev->priv;
1232 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%d bytes), lp->scb at 0x%08lx\n",
1233 dev->name, (unsigned long)lp,
1234 sizeof(struct i596_private), (unsigned long)&lp->scb));
1235 memset((void *) lp, 0, sizeof(struct i596_private));
1236
1237 #ifdef __mc68000__
1238 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1239 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1240 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1241 #endif
1242 lp->scb.command = 0;
1243 lp->scb.cmd = I596_NULL;
1244 lp->scb.rfd = I596_NULL;
1245 lp->lock = SPIN_LOCK_UNLOCKED;
1246
1247 return 0;
1248 }
1249
1250 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1251 {
1252 struct net_device *dev = dev_id;
1253 struct i596_private *lp;
1254 short ioaddr;
1255 unsigned short status, ack_cmd = 0;
1256 int handled = 0;
1257
1258 #ifdef ENABLE_BVME6000_NET
1259 if (MACH_IS_BVME6000) {
1260 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1261 i596_error(irq, dev_id, regs);
1262 return IRQ_HANDLED;
1263 }
1264 }
1265 #endif
1266 if (dev == NULL) {
1267 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1268 return IRQ_NONE;
1269 }
1270
1271 ioaddr = dev->base_addr;
1272 lp = (struct i596_private *) dev->priv;
1273
1274 spin_lock (&lp->lock);
1275
1276 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1277 status = lp->scb.status;
1278
1279 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1280 dev->name, irq, status));
1281
1282 ack_cmd = status & 0xf000;
1283
1284 if ((status & 0x8000) || (status & 0x2000)) {
1285 struct i596_cmd *ptr;
1286
1287 handled = 1;
1288 if ((status & 0x8000))
1289 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1290 if ((status & 0x2000))
1291 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1292
1293 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1294 ptr = lp->cmd_head;
1295
1296 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1297 lp->cmd_head->status, lp->cmd_head->command));
1298 lp->cmd_head = ptr->v_next;
1299 lp->cmd_backlog--;
1300
1301 switch ((ptr->command) & 0x7) {
1302 case CmdTx:
1303 {
1304 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1305 struct sk_buff *skb = tx_cmd->skb;
1306
1307 if ((ptr->status) & STAT_OK) {
1308 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1309 } else {
1310 lp->stats.tx_errors++;
1311 if ((ptr->status) & 0x0020)
1312 lp->stats.collisions++;
1313 if (!((ptr->status) & 0x0040))
1314 lp->stats.tx_heartbeat_errors++;
1315 if ((ptr->status) & 0x0400)
1316 lp->stats.tx_carrier_errors++;
1317 if ((ptr->status) & 0x0800)
1318 lp->stats.collisions++;
1319 if ((ptr->status) & 0x1000)
1320 lp->stats.tx_aborted_errors++;
1321 }
1322
1323 dev_kfree_skb_irq(skb);
1324
1325 tx_cmd->cmd.command = 0; /* Mark free */
1326 break;
1327 }
1328 case CmdTDR:
1329 {
1330 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1331
1332 if (status & 0x8000) {
1333 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1334 } else {
1335 if (status & 0x4000)
1336 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1337 if (status & 0x2000)
1338 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1339 if (status & 0x1000)
1340 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1341
1342 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1343 }
1344 break;
1345 }
1346 case CmdConfigure:
1347 case CmdMulticastList:
1348 /* Zap command so set_multicast_list() knows it is free */
1349 ptr->command = 0;
1350 break;
1351 }
1352 ptr->v_next = ptr->b_next = I596_NULL;
1353 lp->last_cmd = jiffies;
1354 }
1355
1356 ptr = lp->cmd_head;
1357 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1358 ptr->command &= 0x1fff;
1359 ptr = ptr->v_next;
1360 }
1361
1362 if ((lp->cmd_head != I596_NULL))
1363 ack_cmd |= CUC_START;
1364 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1365 }
1366 if ((status & 0x1000) || (status & 0x4000)) {
1367 if ((status & 0x4000))
1368 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1369 i596_rx(dev);
1370 /* Only RX_START if stopped - RGH 07-07-96 */
1371 if (status & 0x1000) {
1372 if (netif_running(dev)) {
1373 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1374 ack_cmd |= RX_START;
1375 lp->stats.rx_errors++;
1376 lp->stats.rx_fifo_errors++;
1377 rebuild_rx_bufs(dev);
1378 }
1379 }
1380 }
1381 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1382 lp->scb.command = ack_cmd;
1383
1384 #ifdef ENABLE_MVME16x_NET
1385 if (MACH_IS_MVME16x) {
1386 /* Ack the interrupt */
1387
1388 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1389
1390 pcc2[0x2a] |= 0x08;
1391 }
1392 #endif
1393 #ifdef ENABLE_BVME6000_NET
1394 if (MACH_IS_BVME6000) {
1395 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1396
1397 *ethirq = 1;
1398 *ethirq = 3;
1399 }
1400 #endif
1401 #ifdef ENABLE_APRICOT
1402 (void) inb(ioaddr + 0x10);
1403 outb(4, ioaddr + 0xf);
1404 #endif
1405 CA(dev);
1406
1407 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1408
1409 spin_unlock (&lp->lock);
1410 return IRQ_RETVAL(handled);
1411 }
1412
1413 static int i596_close(struct net_device *dev)
1414 {
1415 struct i596_private *lp = (struct i596_private *) dev->priv;
1416 unsigned long flags;
1417
1418 netif_stop_queue(dev);
1419
1420 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1421 dev->name, lp->scb.status));
1422
1423 save_flags(flags);
1424 cli();
1425
1426 wait_cmd(dev,lp,100,"close1 timed out");
1427 lp->scb.command = CUC_ABORT | RX_ABORT;
1428 CA(dev);
1429
1430 wait_cmd(dev,lp,100,"close2 timed out");
1431 restore_flags(flags);
1432 DEB(DEB_STRUCT,i596_display_data(dev));
1433 i596_cleanup_cmd(dev,lp);
1434
1435 #ifdef ENABLE_MVME16x_NET
1436 if (MACH_IS_MVME16x) {
1437 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1438
1439 /* Disable all ints */
1440 pcc2[0x28] = 1;
1441 pcc2[0x2a] = 0x40;
1442 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1443 }
1444 #endif
1445 #ifdef ENABLE_BVME6000_NET
1446 if (MACH_IS_BVME6000) {
1447 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1448
1449 *ethirq = 1;
1450 }
1451 #endif
1452
1453 free_irq(dev->irq, dev);
1454 remove_rx_bufs(dev);
1455
1456 return 0;
1457 }
1458
1459 static struct net_device_stats *
1460 i596_get_stats(struct net_device *dev)
1461 {
1462 struct i596_private *lp = (struct i596_private *) dev->priv;
1463
1464 return &lp->stats;
1465 }
1466
1467 /*
1468 * Set or clear the multicast filter for this adaptor.
1469 */
1470
1471 static void set_multicast_list(struct net_device *dev)
1472 {
1473 struct i596_private *lp = (struct i596_private *) dev->priv;
1474 int config = 0, cnt;
1475
1476 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1477 dev->name, dev->mc_count,
1478 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1479 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1480
1481 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1482 return;
1483
1484 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1485 lp->cf_cmd.i596_config[8] |= 0x01;
1486 config = 1;
1487 }
1488 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1489 lp->cf_cmd.i596_config[8] &= ~0x01;
1490 config = 1;
1491 }
1492 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1493 lp->cf_cmd.i596_config[11] &= ~0x20;
1494 config = 1;
1495 }
1496 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1497 lp->cf_cmd.i596_config[11] |= 0x20;
1498 config = 1;
1499 }
1500 if (config) {
1501 lp->cf_cmd.cmd.command = CmdConfigure;
1502 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1503 }
1504
1505 cnt = dev->mc_count;
1506 if (cnt > MAX_MC_CNT)
1507 {
1508 cnt = MAX_MC_CNT;
1509 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1510 dev->name, cnt);
1511 }
1512
1513 if (dev->mc_count > 0) {
1514 struct dev_mc_list *dmi;
1515 unsigned char *cp;
1516 struct mc_cmd *cmd;
1517
1518 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1519 return;
1520 cmd = &lp->mc_cmd;
1521 cmd->cmd.command = CmdMulticastList;
1522 cmd->mc_cnt = dev->mc_count * 6;
1523 cp = cmd->mc_addrs;
1524 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1525 memcpy(cp, dmi->dmi_addr, 6);
1526 if (i596_debug > 1)
1527 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1528 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1529 }
1530 i596_add_cmd(dev, &cmd->cmd);
1531 }
1532 }
1533
1534 #ifdef MODULE
1535 static struct net_device dev_82596 = { .init = i82596_probe };
1536
1537 #ifdef ENABLE_APRICOT
1538 static int io = 0x300;
1539 static int irq = 10;
1540 MODULE_PARM(irq, "i");
1541 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1542 #endif
1543
1544 MODULE_PARM(debug, "i");
1545 MODULE_PARM_DESC(debug, "i82596 debug mask");
1546 static int debug = -1;
1547
1548 int init_module(void)
1549 {
1550 #ifdef ENABLE_APRICOT
1551 dev_82596.base_addr = io;
1552 dev_82596.irq = irq;
1553 #endif
1554 if (debug >= 0)
1555 i596_debug = debug;
1556 if (register_netdev(&dev_82596) != 0)
1557 return -EIO;
1558 return 0;
1559 }
1560
1561 void cleanup_module(void)
1562 {
1563 unregister_netdev(&dev_82596);
1564 #ifdef __mc68000__
1565 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1566 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1567 */
1568
1569 kernel_set_cachemode((void *)(dev_82596.mem_start), 4096,
1570 IOMAP_FULL_CACHING);
1571 #endif
1572 free_page ((u32)(dev_82596.mem_start));
1573 dev_82596.priv = NULL;
1574 #ifdef ENABLE_APRICOT
1575 /* If we don't do this, we can't re-insmod it later. */
1576 release_region(dev_82596.base_addr, I596_TOTAL_SIZE);
1577 #endif
1578 }
1579
1580 #endif /* MODULE */
1581 \f
1582 /*
1583 * Local variables:
1584 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1585 * End:
1586 */
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