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Merge ../linux-2.6-watchdog-mm
[mirror_ubuntu-artful-kernel.git] / drivers / net / 82596.c
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/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>
60
61 static char version[] __initdata =
62 "82596.c $Revision: 1.5 $\n";
63
64 #define DRV_NAME "82596"
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_param(i596_debug, int, 0);
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);
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 = 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)
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 = 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->data;
549 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
550 rbd->size = PKT_BUF_SZ;
551 #ifdef __mc68000__
552 cache_clear(virt_to_phys(skb->data), 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 = 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 = 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 = dev->priv;
616 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
617 short ioaddr = dev->base_addr;
618 #endif
619 unsigned long flags;
620
621 MPU_PORT(dev, PORT_RESET, NULL);
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, NULL);
763 return -1;
764 }
765
766 static inline int i596_rx(struct net_device *dev)
767 {
768 struct i596_private *lp = 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->data;
819 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
820 #ifdef __mc68000__
821 cache_clear(virt_to_phys(newskb->data), 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->data),
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 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 void i596_reset(struct net_device *dev, struct i596_private *lp,
936 int ioaddr)
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
962 static 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
1003 static 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
1032 static 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
1061 static 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
1069 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1070 dev->name, skb->len, skb->data));
1071
1072 if (skb->len < ETH_ZLEN) {
1073 if (skb_padto(skb, ETH_ZLEN))
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 static int io = 0x300;
1133 static int irq = 10;
1134
1135 struct 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
1211 if ((checksum % 0x100) ||
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. */
1237 SET_MODULE_OWNER(dev);
1238 dev->open = i596_open;
1239 dev->stop = i596_close;
1240 dev->hard_start_xmit = i596_start_xmit;
1241 dev->get_stats = i596_get_stats;
1242 dev->set_multicast_list = set_multicast_list;
1243 dev->tx_timeout = i596_tx_timeout;
1244 dev->watchdog_timeo = TX_TIMEOUT;
1245
1246 dev->priv = (void *)(dev->mem_start);
1247
1248 lp = dev->priv;
1249 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1250 "lp->scb at 0x%08lx\n",
1251 dev->name, (unsigned long)lp,
1252 sizeof(struct i596_private), (unsigned long)&lp->scb));
1253 memset((void *) lp, 0, sizeof(struct i596_private));
1254
1255 #ifdef __mc68000__
1256 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1257 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1258 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1259 #endif
1260 lp->scb.command = 0;
1261 lp->scb.cmd = I596_NULL;
1262 lp->scb.rfd = I596_NULL;
1263 spin_lock_init(&lp->lock);
1264
1265 err = register_netdev(dev);
1266 if (err)
1267 goto out2;
1268 return dev;
1269 out2:
1270 #ifdef __mc68000__
1271 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1272 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1273 */
1274 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1275 IOMAP_FULL_CACHING);
1276 #endif
1277 free_page ((u32)(dev->mem_start));
1278 out1:
1279 #ifdef ENABLE_APRICOT
1280 release_region(dev->base_addr, I596_TOTAL_SIZE);
1281 #endif
1282 out:
1283 free_netdev(dev);
1284 return ERR_PTR(err);
1285 }
1286
1287 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1288 {
1289 struct net_device *dev = dev_id;
1290 struct i596_private *lp;
1291 short ioaddr;
1292 unsigned short status, ack_cmd = 0;
1293 int handled = 0;
1294
1295 #ifdef ENABLE_BVME6000_NET
1296 if (MACH_IS_BVME6000) {
1297 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1298 i596_error(irq, dev_id);
1299 return IRQ_HANDLED;
1300 }
1301 }
1302 #endif
1303 if (dev == NULL) {
1304 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1305 return IRQ_NONE;
1306 }
1307
1308 ioaddr = dev->base_addr;
1309 lp = dev->priv;
1310
1311 spin_lock (&lp->lock);
1312
1313 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1314 status = lp->scb.status;
1315
1316 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1317 dev->name, irq, status));
1318
1319 ack_cmd = status & 0xf000;
1320
1321 if ((status & 0x8000) || (status & 0x2000)) {
1322 struct i596_cmd *ptr;
1323
1324 handled = 1;
1325 if ((status & 0x8000))
1326 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1327 if ((status & 0x2000))
1328 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1329
1330 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1331 ptr = lp->cmd_head;
1332
1333 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1334 lp->cmd_head->status, lp->cmd_head->command));
1335 lp->cmd_head = ptr->v_next;
1336 lp->cmd_backlog--;
1337
1338 switch ((ptr->command) & 0x7) {
1339 case CmdTx:
1340 {
1341 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1342 struct sk_buff *skb = tx_cmd->skb;
1343
1344 if ((ptr->status) & STAT_OK) {
1345 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1346 } else {
1347 lp->stats.tx_errors++;
1348 if ((ptr->status) & 0x0020)
1349 lp->stats.collisions++;
1350 if (!((ptr->status) & 0x0040))
1351 lp->stats.tx_heartbeat_errors++;
1352 if ((ptr->status) & 0x0400)
1353 lp->stats.tx_carrier_errors++;
1354 if ((ptr->status) & 0x0800)
1355 lp->stats.collisions++;
1356 if ((ptr->status) & 0x1000)
1357 lp->stats.tx_aborted_errors++;
1358 }
1359
1360 dev_kfree_skb_irq(skb);
1361
1362 tx_cmd->cmd.command = 0; /* Mark free */
1363 break;
1364 }
1365 case CmdTDR:
1366 {
1367 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1368
1369 if (status & 0x8000) {
1370 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1371 } else {
1372 if (status & 0x4000)
1373 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1374 if (status & 0x2000)
1375 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1376 if (status & 0x1000)
1377 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1378
1379 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1380 }
1381 break;
1382 }
1383 case CmdConfigure:
1384 case CmdMulticastList:
1385 /* Zap command so set_multicast_list() knows it is free */
1386 ptr->command = 0;
1387 break;
1388 }
1389 ptr->v_next = ptr->b_next = I596_NULL;
1390 lp->last_cmd = jiffies;
1391 }
1392
1393 ptr = lp->cmd_head;
1394 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1395 ptr->command &= 0x1fff;
1396 ptr = ptr->v_next;
1397 }
1398
1399 if ((lp->cmd_head != I596_NULL))
1400 ack_cmd |= CUC_START;
1401 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1402 }
1403 if ((status & 0x1000) || (status & 0x4000)) {
1404 if ((status & 0x4000))
1405 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1406 i596_rx(dev);
1407 /* Only RX_START if stopped - RGH 07-07-96 */
1408 if (status & 0x1000) {
1409 if (netif_running(dev)) {
1410 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1411 ack_cmd |= RX_START;
1412 lp->stats.rx_errors++;
1413 lp->stats.rx_fifo_errors++;
1414 rebuild_rx_bufs(dev);
1415 }
1416 }
1417 }
1418 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1419 lp->scb.command = ack_cmd;
1420
1421 #ifdef ENABLE_MVME16x_NET
1422 if (MACH_IS_MVME16x) {
1423 /* Ack the interrupt */
1424
1425 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1426
1427 pcc2[0x2a] |= 0x08;
1428 }
1429 #endif
1430 #ifdef ENABLE_BVME6000_NET
1431 if (MACH_IS_BVME6000) {
1432 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1433
1434 *ethirq = 1;
1435 *ethirq = 3;
1436 }
1437 #endif
1438 #ifdef ENABLE_APRICOT
1439 (void) inb(ioaddr + 0x10);
1440 outb(4, ioaddr + 0xf);
1441 #endif
1442 CA(dev);
1443
1444 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1445
1446 spin_unlock (&lp->lock);
1447 return IRQ_RETVAL(handled);
1448 }
1449
1450 static int i596_close(struct net_device *dev)
1451 {
1452 struct i596_private *lp = dev->priv;
1453 unsigned long flags;
1454
1455 netif_stop_queue(dev);
1456
1457 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1458 dev->name, lp->scb.status));
1459
1460 spin_lock_irqsave(&lp->lock, flags);
1461
1462 wait_cmd(dev,lp,100,"close1 timed out");
1463 lp->scb.command = CUC_ABORT | RX_ABORT;
1464 CA(dev);
1465
1466 wait_cmd(dev,lp,100,"close2 timed out");
1467
1468 spin_unlock_irqrestore(&lp->lock, flags);
1469 DEB(DEB_STRUCT,i596_display_data(dev));
1470 i596_cleanup_cmd(dev,lp);
1471
1472 #ifdef ENABLE_MVME16x_NET
1473 if (MACH_IS_MVME16x) {
1474 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1475
1476 /* Disable all ints */
1477 pcc2[0x28] = 1;
1478 pcc2[0x2a] = 0x40;
1479 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1480 }
1481 #endif
1482 #ifdef ENABLE_BVME6000_NET
1483 if (MACH_IS_BVME6000) {
1484 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1485
1486 *ethirq = 1;
1487 }
1488 #endif
1489
1490 free_irq(dev->irq, dev);
1491 remove_rx_bufs(dev);
1492
1493 return 0;
1494 }
1495
1496 static struct net_device_stats *
1497 i596_get_stats(struct net_device *dev)
1498 {
1499 struct i596_private *lp = dev->priv;
1500
1501 return &lp->stats;
1502 }
1503
1504 /*
1505 * Set or clear the multicast filter for this adaptor.
1506 */
1507
1508 static void set_multicast_list(struct net_device *dev)
1509 {
1510 struct i596_private *lp = dev->priv;
1511 int config = 0, cnt;
1512
1513 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1514 dev->name, dev->mc_count,
1515 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1516 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1517
1518 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1519 return;
1520
1521 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1522 lp->cf_cmd.i596_config[8] |= 0x01;
1523 config = 1;
1524 }
1525 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1526 lp->cf_cmd.i596_config[8] &= ~0x01;
1527 config = 1;
1528 }
1529 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1530 lp->cf_cmd.i596_config[11] &= ~0x20;
1531 config = 1;
1532 }
1533 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1534 lp->cf_cmd.i596_config[11] |= 0x20;
1535 config = 1;
1536 }
1537 if (config) {
1538 lp->cf_cmd.cmd.command = CmdConfigure;
1539 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1540 }
1541
1542 cnt = dev->mc_count;
1543 if (cnt > MAX_MC_CNT)
1544 {
1545 cnt = MAX_MC_CNT;
1546 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1547 dev->name, cnt);
1548 }
1549
1550 if (dev->mc_count > 0) {
1551 struct dev_mc_list *dmi;
1552 unsigned char *cp;
1553 struct mc_cmd *cmd;
1554
1555 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1556 return;
1557 cmd = &lp->mc_cmd;
1558 cmd->cmd.command = CmdMulticastList;
1559 cmd->mc_cnt = dev->mc_count * 6;
1560 cp = cmd->mc_addrs;
1561 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1562 memcpy(cp, dmi->dmi_addr, 6);
1563 if (i596_debug > 1)
1564 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
1565 dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
1566 }
1567 i596_add_cmd(dev, &cmd->cmd);
1568 }
1569 }
1570
1571 #ifdef MODULE
1572 static struct net_device *dev_82596;
1573
1574 #ifdef ENABLE_APRICOT
1575 module_param(irq, int, 0);
1576 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1577 #endif
1578
1579 static int debug = -1;
1580 module_param(debug, int, 0);
1581 MODULE_PARM_DESC(debug, "i82596 debug mask");
1582
1583 int __init init_module(void)
1584 {
1585 if (debug >= 0)
1586 i596_debug = debug;
1587 dev_82596 = i82596_probe(-1);
1588 if (IS_ERR(dev_82596))
1589 return PTR_ERR(dev_82596);
1590 return 0;
1591 }
1592
1593 void __exit cleanup_module(void)
1594 {
1595 unregister_netdev(dev_82596);
1596 #ifdef __mc68000__
1597 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1598 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1599 */
1600
1601 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1602 IOMAP_FULL_CACHING);
1603 #endif
1604 free_page ((u32)(dev_82596->mem_start));
1605 #ifdef ENABLE_APRICOT
1606 /* If we don't do this, we can't re-insmod it later. */
1607 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1608 #endif
1609 free_netdev(dev_82596);
1610 }
1611
1612 #endif /* MODULE */
1613
1614 /*
1615 * Local variables:
1616 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1617 * End:
1618 */
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