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Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
[wrt350n-kernel.git] / drivers / net / 82596.c
blob2797da7eeee665c4c99a3eb9c6ffbc350460e812
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 #include <asm/cacheflush.h>
61
62 static char version[] __initdata =
63 "82596.c $Revision: 1.5 $\n";
64
65 #define DRV_NAME "82596"
66
67 /* DEBUG flags
68 */
69
70 #define DEB_INIT 0x0001
71 #define DEB_PROBE 0x0002
72 #define DEB_SERIOUS 0x0004
73 #define DEB_ERRORS 0x0008
74 #define DEB_MULTI 0x0010
75 #define DEB_TDR 0x0020
76 #define DEB_OPEN 0x0040
77 #define DEB_RESET 0x0080
78 #define DEB_ADDCMD 0x0100
79 #define DEB_STATUS 0x0200
80 #define DEB_STARTTX 0x0400
81 #define DEB_RXADDR 0x0800
82 #define DEB_TXADDR 0x1000
83 #define DEB_RXFRAME 0x2000
84 #define DEB_INTS 0x4000
85 #define DEB_STRUCT 0x8000
86 #define DEB_ANY 0xffff
87
88
89 #define DEB(x,y) if (i596_debug & (x)) y
90
91
92 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
93 #define ENABLE_MVME16x_NET
94 #endif
95 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
96 #define ENABLE_BVME6000_NET
97 #endif
98 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
99 #define ENABLE_APRICOT
100 #endif
101
102 #ifdef ENABLE_MVME16x_NET
103 #include <asm/mvme16xhw.h>
104 #endif
105 #ifdef ENABLE_BVME6000_NET
106 #include <asm/bvme6000hw.h>
107 #endif
108
109 /*
110 * Define various macros for Channel Attention, word swapping etc., dependent
111 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
112 */
113
114 #ifdef __mc68000__
115 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
120 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
121 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
122 #define ISCP_BUSY 0x00010000
123 #define MACH_IS_APRICOT 0
124 #else
125 #define WSWAPrfd(x) ((struct i596_rfd *)(x))
126 #define WSWAPrbd(x) ((struct i596_rbd *)(x))
127 #define WSWAPiscp(x) ((struct i596_iscp *)(x))
128 #define WSWAPscb(x) ((struct i596_scb *)(x))
129 #define WSWAPcmd(x) ((struct i596_cmd *)(x))
130 #define WSWAPtbd(x) ((struct i596_tbd *)(x))
131 #define WSWAPchar(x) ((char *)(x))
132 #define ISCP_BUSY 0x0001
133 #define MACH_IS_APRICOT 1
134 #endif
135
136 /*
137 * The MPU_PORT command allows direct access to the 82596. With PORT access
138 * the following commands are available (p5-18). The 32-bit port command
139 * must be word-swapped with the most significant word written first.
140 * This only applies to VME boards.
141 */
142 #define PORT_RESET 0x00 /* reset 82596 */
143 #define PORT_SELFTEST 0x01 /* selftest */
144 #define PORT_ALTSCP 0x02 /* alternate SCB address */
145 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
146
147 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
148
149 MODULE_AUTHOR("Richard Hirst");
150 MODULE_DESCRIPTION("i82596 driver");
151 MODULE_LICENSE("GPL");
152
153 module_param(i596_debug, int, 0);
154 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
155
156
157 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
158 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
159 */
160 static int rx_copybreak = 100;
161
162 #define PKT_BUF_SZ 1536
163 #define MAX_MC_CNT 64
164
165 #define I596_TOTAL_SIZE 17
166
167 #define I596_NULL ((void *)0xffffffff)
168
169 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
170 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
171 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
172
173 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
174
175 enum commands {
176 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
177 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
178 };
179
180 #define STAT_C 0x8000 /* Set to 0 after execution */
181 #define STAT_B 0x4000 /* Command being executed */
182 #define STAT_OK 0x2000 /* Command executed ok */
183 #define STAT_A 0x1000 /* Command aborted */
184
185 #define CUC_START 0x0100
186 #define CUC_RESUME 0x0200
187 #define CUC_SUSPEND 0x0300
188 #define CUC_ABORT 0x0400
189 #define RX_START 0x0010
190 #define RX_RESUME 0x0020
191 #define RX_SUSPEND 0x0030
192 #define RX_ABORT 0x0040
193
194 #define TX_TIMEOUT 5
195
196
197 struct i596_reg {
198 unsigned short porthi;
199 unsigned short portlo;
200 unsigned long ca;
201 };
202
203 #define EOF 0x8000
204 #define SIZE_MASK 0x3fff
205
206 struct i596_tbd {
207 unsigned short size;
208 unsigned short pad;
209 struct i596_tbd *next;
210 char *data;
211 };
212
213 /* The command structure has two 'next' pointers; v_next is the address of
214 * the next command as seen by the CPU, b_next is the address of the next
215 * command as seen by the 82596. The b_next pointer, as used by the 82596
216 * always references the status field of the next command, rather than the
217 * v_next field, because the 82596 is unaware of v_next. It may seem more
218 * logical to put v_next at the end of the structure, but we cannot do that
219 * because the 82596 expects other fields to be there, depending on command
220 * type.
221 */
222
223 struct i596_cmd {
224 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
225 unsigned short status;
226 unsigned short command;
227 struct i596_cmd *b_next; /* Address from i596 viewpoint */
228 };
229
230 struct tx_cmd {
231 struct i596_cmd cmd;
232 struct i596_tbd *tbd;
233 unsigned short size;
234 unsigned short pad;
235 struct sk_buff *skb; /* So we can free it after tx */
236 };
237
238 struct tdr_cmd {
239 struct i596_cmd cmd;
240 unsigned short status;
241 unsigned short pad;
242 };
243
244 struct mc_cmd {
245 struct i596_cmd cmd;
246 short mc_cnt;
247 char mc_addrs[MAX_MC_CNT*6];
248 };
249
250 struct sa_cmd {
251 struct i596_cmd cmd;
252 char eth_addr[8];
253 };
254
255 struct cf_cmd {
256 struct i596_cmd cmd;
257 char i596_config[16];
258 };
259
260 struct i596_rfd {
261 unsigned short stat;
262 unsigned short cmd;
263 struct i596_rfd *b_next; /* Address from i596 viewpoint */
264 struct i596_rbd *rbd;
265 unsigned short count;
266 unsigned short size;
267 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
268 struct i596_rfd *v_prev;
269 };
270
271 struct i596_rbd {
272 unsigned short count;
273 unsigned short zero1;
274 struct i596_rbd *b_next;
275 unsigned char *b_data; /* Address from i596 viewpoint */
276 unsigned short size;
277 unsigned short zero2;
278 struct sk_buff *skb;
279 struct i596_rbd *v_next;
280 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
281 unsigned char *v_data; /* Address from CPUs viewpoint */
282 };
283
284 #define TX_RING_SIZE 64
285 #define RX_RING_SIZE 16
286
287 struct i596_scb {
288 unsigned short status;
289 unsigned short command;
290 struct i596_cmd *cmd;
291 struct i596_rfd *rfd;
292 unsigned long crc_err;
293 unsigned long align_err;
294 unsigned long resource_err;
295 unsigned long over_err;
296 unsigned long rcvdt_err;
297 unsigned long short_err;
298 unsigned short t_on;
299 unsigned short t_off;
300 };
301
302 struct i596_iscp {
303 unsigned long stat;
304 struct i596_scb *scb;
305 };
306
307 struct i596_scp {
308 unsigned long sysbus;
309 unsigned long pad;
310 struct i596_iscp *iscp;
311 };
312
313 struct i596_private {
314 volatile struct i596_scp scp;
315 volatile struct i596_iscp iscp;
316 volatile struct i596_scb scb;
317 struct sa_cmd sa_cmd;
318 struct cf_cmd cf_cmd;
319 struct tdr_cmd tdr_cmd;
320 struct mc_cmd mc_cmd;
321 unsigned long stat;
322 int last_restart __attribute__((aligned(4)));
323 struct i596_rfd *rfd_head;
324 struct i596_rbd *rbd_head;
325 struct i596_cmd *cmd_tail;
326 struct i596_cmd *cmd_head;
327 int cmd_backlog;
328 unsigned long last_cmd;
329 struct i596_rfd rfds[RX_RING_SIZE];
330 struct i596_rbd rbds[RX_RING_SIZE];
331 struct tx_cmd tx_cmds[TX_RING_SIZE];
332 struct i596_tbd tbds[TX_RING_SIZE];
333 int next_tx_cmd;
334 spinlock_t lock;
335 };
336
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 void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
363 static void i596_tx_timeout (struct net_device *dev);
364 static void print_eth(unsigned char *buf, char *str);
365 static void set_multicast_list(struct net_device *dev);
366
367 static int rx_ring_size = RX_RING_SIZE;
368 static int ticks_limit = 25;
369 static int max_cmd_backlog = TX_RING_SIZE-1;
370
371
372 static inline void CA(struct net_device *dev)
373 {
374 #ifdef ENABLE_MVME16x_NET
375 if (MACH_IS_MVME16x) {
376 ((struct i596_reg *) dev->base_addr)->ca = 1;
377 }
378 #endif
379 #ifdef ENABLE_BVME6000_NET
380 if (MACH_IS_BVME6000) {
381 volatile u32 i;
382
383 i = *(volatile u32 *) (dev->base_addr);
384 }
385 #endif
386 #ifdef ENABLE_APRICOT
387 if (MACH_IS_APRICOT) {
388 outw(0, (short) (dev->base_addr) + 4);
389 }
390 #endif
391 }
392
393
394 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
395 {
396 #ifdef ENABLE_MVME16x_NET
397 if (MACH_IS_MVME16x) {
398 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
399 p->porthi = ((c) | (u32) (x)) & 0xffff;
400 p->portlo = ((c) | (u32) (x)) >> 16;
401 }
402 #endif
403 #ifdef ENABLE_BVME6000_NET
404 if (MACH_IS_BVME6000) {
405 u32 v = (u32) (c) | (u32) (x);
406 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
407 *(volatile u32 *) dev->base_addr = v;
408 udelay(1);
409 *(volatile u32 *) dev->base_addr = v;
410 }
411 #endif
412 }
413
414
415 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
416 {
417 while (--delcnt && lp->iscp.stat)
418 udelay(10);
419 if (!delcnt) {
420 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
421 dev->name, str, lp->scb.status, lp->scb.command);
422 return -1;
423 }
424 else
425 return 0;
426 }
427
428
429 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
430 {
431 while (--delcnt && lp->scb.command)
432 udelay(10);
433 if (!delcnt) {
434 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
435 dev->name, str, lp->scb.status, lp->scb.command);
436 return -1;
437 }
438 else
439 return 0;
440 }
441
442
443 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
444 {
445 volatile struct i596_cmd *c = cmd;
446
447 while (--delcnt && c->command)
448 udelay(10);
449 if (!delcnt) {
450 printk(KERN_ERR "%s: %s.\n", dev->name, str);
451 return -1;
452 }
453 else
454 return 0;
455 }
456
457
458 static void i596_display_data(struct net_device *dev)
459 {
460 struct i596_private *lp = dev->priv;
461 struct i596_cmd *cmd;
462 struct i596_rfd *rfd;
463 struct i596_rbd *rbd;
464
465 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
466 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
467 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
468 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
469 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
470 " .cmd = %p, .rfd = %p\n",
471 &lp->scb, lp->scb.status, lp->scb.command,
472 lp->scb.cmd, lp->scb.rfd);
473 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
474 " over %lx, rcvdt %lx, short %lx\n",
475 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
476 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
477 cmd = lp->cmd_head;
478 while (cmd != I596_NULL) {
479 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
480 cmd, cmd->status, cmd->command, cmd->b_next);
481 cmd = cmd->v_next;
482 }
483 rfd = lp->rfd_head;
484 printk(KERN_ERR "rfd_head = %p\n", rfd);
485 do {
486 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
487 " count %04x\n",
488 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
489 rfd->count);
490 rfd = rfd->v_next;
491 } while (rfd != lp->rfd_head);
492 rbd = lp->rbd_head;
493 printk(KERN_ERR "rbd_head = %p\n", rbd);
494 do {
495 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
496 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
497 rbd = rbd->v_next;
498 } while (rbd != lp->rbd_head);
499 }
500
501
502 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
503 static irqreturn_t i596_error(int irq, void *dev_id)
504 {
505 struct net_device *dev = dev_id;
506 #ifdef ENABLE_MVME16x_NET
507 if (MACH_IS_MVME16x) {
508 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
509
510 pcc2[0x28] = 1;
511 pcc2[0x2b] = 0x1d;
512 }
513 #endif
514 #ifdef ENABLE_BVME6000_NET
515 if (MACH_IS_BVME6000) {
516 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
517
518 *ethirq = 1;
519 *ethirq = 3;
520 }
521 #endif
522 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
523 i596_display_data(dev);
524 return IRQ_HANDLED;
525 }
526 #endif
527
528 static inline void init_rx_bufs(struct net_device *dev)
529 {
530 struct i596_private *lp = dev->priv;
531 int i;
532 struct i596_rfd *rfd;
533 struct i596_rbd *rbd;
534
535 /* First build the Receive Buffer Descriptor List */
536
537 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
538 struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
539
540 if (skb == NULL)
541 panic("82596: alloc_skb() failed");
542 skb->dev = dev;
543 rbd->v_next = rbd+1;
544 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
545 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
546 rbd->skb = skb;
547 rbd->v_data = skb->data;
548 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
549 rbd->size = PKT_BUF_SZ;
550 #ifdef __mc68000__
551 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
552 #endif
553 }
554 lp->rbd_head = lp->rbds;
555 rbd = lp->rbds + rx_ring_size - 1;
556 rbd->v_next = lp->rbds;
557 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
558
559 /* Now build the Receive Frame Descriptor List */
560
561 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
562 rfd->rbd = I596_NULL;
563 rfd->v_next = rfd+1;
564 rfd->v_prev = rfd-1;
565 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
566 rfd->cmd = CMD_FLEX;
567 }
568 lp->rfd_head = lp->rfds;
569 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
570 rfd = lp->rfds;
571 rfd->rbd = lp->rbd_head;
572 rfd->v_prev = lp->rfds + rx_ring_size - 1;
573 rfd = lp->rfds + rx_ring_size - 1;
574 rfd->v_next = lp->rfds;
575 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
576 rfd->cmd = CMD_EOL|CMD_FLEX;
577 }
578
579 static inline void remove_rx_bufs(struct net_device *dev)
580 {
581 struct i596_private *lp = dev->priv;
582 struct i596_rbd *rbd;
583 int i;
584
585 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
586 if (rbd->skb == NULL)
587 break;
588 dev_kfree_skb(rbd->skb);
589 }
590 }
591
592
593 static void rebuild_rx_bufs(struct net_device *dev)
594 {
595 struct i596_private *lp = dev->priv;
596 int i;
597
598 /* Ensure rx frame/buffer descriptors are tidy */
599
600 for (i = 0; i < rx_ring_size; i++) {
601 lp->rfds[i].rbd = I596_NULL;
602 lp->rfds[i].cmd = CMD_FLEX;
603 }
604 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
605 lp->rfd_head = lp->rfds;
606 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
607 lp->rbd_head = lp->rbds;
608 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
609 }
610
611
612 static int init_i596_mem(struct net_device *dev)
613 {
614 struct i596_private *lp = dev->priv;
615 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT)
616 short ioaddr = dev->base_addr;
617 #endif
618 unsigned long flags;
619
620 MPU_PORT(dev, PORT_RESET, NULL);
621
622 udelay(100); /* Wait 100us - seems to help */
623
624 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
625 #ifdef ENABLE_MVME16x_NET
626 if (MACH_IS_MVME16x) {
627 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
628
629 /* Disable all ints for now */
630 pcc2[0x28] = 1;
631 pcc2[0x2a] = 0x48;
632 /* Following disables snooping. Snooping is not required
633 * as we make appropriate use of non-cached pages for
634 * shared data, and cache_push/cache_clear.
635 */
636 pcc2[0x2b] = 0x08;
637 }
638 #endif
639 #ifdef ENABLE_BVME6000_NET
640 if (MACH_IS_BVME6000) {
641 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
642
643 *ethirq = 1;
644 }
645 #endif
646
647 /* change the scp address */
648
649 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
650
651 #elif defined(ENABLE_APRICOT)
652
653 {
654 u32 scp = virt_to_bus(&lp->scp);
655
656 /* change the scp address */
657 outw(0, ioaddr);
658 outw(0, ioaddr);
659 outb(4, ioaddr + 0xf);
660 outw(scp | 2, ioaddr);
661 outw(scp >> 16, ioaddr);
662 }
663 #endif
664
665 lp->last_cmd = jiffies;
666
667 #ifdef ENABLE_MVME16x_NET
668 if (MACH_IS_MVME16x)
669 lp->scp.sysbus = 0x00000054;
670 #endif
671 #ifdef ENABLE_BVME6000_NET
672 if (MACH_IS_BVME6000)
673 lp->scp.sysbus = 0x0000004c;
674 #endif
675 #ifdef ENABLE_APRICOT
676 if (MACH_IS_APRICOT)
677 lp->scp.sysbus = 0x00440000;
678 #endif
679
680 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
681 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
682 lp->iscp.stat = ISCP_BUSY;
683 lp->cmd_backlog = 0;
684
685 lp->cmd_head = lp->scb.cmd = I596_NULL;
686
687 #ifdef ENABLE_BVME6000_NET
688 if (MACH_IS_BVME6000) {
689 lp->scb.t_on = 7 * 25;
690 lp->scb.t_off = 1 * 25;
691 }
692 #endif
693
694 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
695
696 #if defined(ENABLE_APRICOT)
697 (void) inb(ioaddr + 0x10);
698 outb(4, ioaddr + 0xf);
699 #endif
700 CA(dev);
701
702 if (wait_istat(dev,lp,1000,"initialization timed out"))
703 goto failed;
704 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
705
706 /* Ensure rx frame/buffer descriptors are tidy */
707 rebuild_rx_bufs(dev);
708 lp->scb.command = 0;
709
710 #ifdef ENABLE_MVME16x_NET
711 if (MACH_IS_MVME16x) {
712 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
713
714 /* Enable ints, etc. now */
715 pcc2[0x2a] = 0x55; /* Edge sensitive */
716 pcc2[0x2b] = 0x15;
717 }
718 #endif
719 #ifdef ENABLE_BVME6000_NET
720 if (MACH_IS_BVME6000) {
721 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
722
723 *ethirq = 3;
724 }
725 #endif
726
727
728 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
729 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
730 lp->cf_cmd.cmd.command = CmdConfigure;
731 i596_add_cmd(dev, &lp->cf_cmd.cmd);
732
733 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
734 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
735 lp->sa_cmd.cmd.command = CmdSASetup;
736 i596_add_cmd(dev, &lp->sa_cmd.cmd);
737
738 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
739 lp->tdr_cmd.cmd.command = CmdTDR;
740 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
741
742 spin_lock_irqsave (&lp->lock, flags);
743
744 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
745 spin_unlock_irqrestore (&lp->lock, flags);
746 goto failed;
747 }
748 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
749 lp->scb.command = RX_START;
750 CA(dev);
751
752 spin_unlock_irqrestore (&lp->lock, flags);
753
754 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
755 goto failed;
756 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
757 return 0;
758
759 failed:
760 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
761 MPU_PORT(dev, PORT_RESET, NULL);
762 return -1;
763 }
764
765 static inline int i596_rx(struct net_device *dev)
766 {
767 struct i596_private *lp = dev->priv;
768 struct i596_rfd *rfd;
769 struct i596_rbd *rbd;
770 int frames = 0;
771
772 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
773 lp->rfd_head, lp->rbd_head));
774
775 rfd = lp->rfd_head; /* Ref next frame to check */
776
777 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
778 if (rfd->rbd == I596_NULL)
779 rbd = I596_NULL;
780 else if (rfd->rbd == lp->rbd_head->b_addr)
781 rbd = lp->rbd_head;
782 else {
783 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
784 /* XXX Now what? */
785 rbd = I596_NULL;
786 }
787 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
788 rfd, rfd->rbd, rfd->stat));
789
790 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
791 /* a good frame */
792 int pkt_len = rbd->count & 0x3fff;
793 struct sk_buff *skb = rbd->skb;
794 int rx_in_place = 0;
795
796 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
797 frames++;
798
799 /* Check if the packet is long enough to just accept
800 * without copying to a properly sized skbuff.
801 */
802
803 if (pkt_len > rx_copybreak) {
804 struct sk_buff *newskb;
805
806 /* Get fresh skbuff to replace filled one. */
807 newskb = dev_alloc_skb(PKT_BUF_SZ);
808 if (newskb == NULL) {
809 skb = NULL; /* drop pkt */
810 goto memory_squeeze;
811 }
812 /* Pass up the skb already on the Rx ring. */
813 skb_put(skb, pkt_len);
814 rx_in_place = 1;
815 rbd->skb = newskb;
816 newskb->dev = dev;
817 rbd->v_data = newskb->data;
818 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
819 #ifdef __mc68000__
820 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
821 #endif
822 }
823 else
824 skb = dev_alloc_skb(pkt_len + 2);
825 memory_squeeze:
826 if (skb == NULL) {
827 /* XXX tulip.c can defer packets here!! */
828 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
829 dev->stats.rx_dropped++;
830 }
831 else {
832 if (!rx_in_place) {
833 /* 16 byte align the data fields */
834 skb_reserve(skb, 2);
835 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
836 }
837 skb->protocol=eth_type_trans(skb,dev);
838 skb->len = pkt_len;
839 #ifdef __mc68000__
840 cache_clear(virt_to_phys(rbd->skb->data),
841 pkt_len);
842 #endif
843 netif_rx(skb);
844 dev->last_rx = jiffies;
845 dev->stats.rx_packets++;
846 dev->stats.rx_bytes+=pkt_len;
847 }
848 }
849 else {
850 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
851 dev->name, rfd->stat));
852 dev->stats.rx_errors++;
853 if ((rfd->stat) & 0x0001)
854 dev->stats.collisions++;
855 if ((rfd->stat) & 0x0080)
856 dev->stats.rx_length_errors++;
857 if ((rfd->stat) & 0x0100)
858 dev->stats.rx_over_errors++;
859 if ((rfd->stat) & 0x0200)
860 dev->stats.rx_fifo_errors++;
861 if ((rfd->stat) & 0x0400)
862 dev->stats.rx_frame_errors++;
863 if ((rfd->stat) & 0x0800)
864 dev->stats.rx_crc_errors++;
865 if ((rfd->stat) & 0x1000)
866 dev->stats.rx_length_errors++;
867 }
868
869 /* Clear the buffer descriptor count and EOF + F flags */
870
871 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
872 rbd->count = 0;
873 lp->rbd_head = rbd->v_next;
874 }
875
876 /* Tidy the frame descriptor, marking it as end of list */
877
878 rfd->rbd = I596_NULL;
879 rfd->stat = 0;
880 rfd->cmd = CMD_EOL|CMD_FLEX;
881 rfd->count = 0;
882
883 /* Remove end-of-list from old end descriptor */
884
885 rfd->v_prev->cmd = CMD_FLEX;
886
887 /* Update record of next frame descriptor to process */
888
889 lp->scb.rfd = rfd->b_next;
890 lp->rfd_head = rfd->v_next;
891 rfd = lp->rfd_head;
892 }
893
894 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
895
896 return 0;
897 }
898
899
900 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
901 {
902 struct i596_cmd *ptr;
903
904 while (lp->cmd_head != I596_NULL) {
905 ptr = lp->cmd_head;
906 lp->cmd_head = ptr->v_next;
907 lp->cmd_backlog--;
908
909 switch ((ptr->command) & 0x7) {
910 case CmdTx:
911 {
912 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
913 struct sk_buff *skb = tx_cmd->skb;
914
915 dev_kfree_skb(skb);
916
917 dev->stats.tx_errors++;
918 dev->stats.tx_aborted_errors++;
919
920 ptr->v_next = ptr->b_next = I596_NULL;
921 tx_cmd->cmd.command = 0; /* Mark as free */
922 break;
923 }
924 default:
925 ptr->v_next = ptr->b_next = I596_NULL;
926 }
927 }
928
929 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
930 lp->scb.cmd = I596_NULL;
931 }
932
933 static void i596_reset(struct net_device *dev, struct i596_private *lp,
934 int ioaddr)
935 {
936 unsigned long flags;
937
938 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
939
940 spin_lock_irqsave (&lp->lock, flags);
941
942 wait_cmd(dev,lp,100,"i596_reset timed out");
943
944 netif_stop_queue(dev);
945
946 lp->scb.command = CUC_ABORT | RX_ABORT;
947 CA(dev);
948
949 /* wait for shutdown */
950 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
951 spin_unlock_irqrestore (&lp->lock, flags);
952
953 i596_cleanup_cmd(dev,lp);
954 i596_rx(dev);
955
956 netif_start_queue(dev);
957 init_i596_mem(dev);
958 }
959
960 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
961 {
962 struct i596_private *lp = dev->priv;
963 int ioaddr = dev->base_addr;
964 unsigned long flags;
965
966 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
967
968 cmd->status = 0;
969 cmd->command |= (CMD_EOL | CMD_INTR);
970 cmd->v_next = cmd->b_next = I596_NULL;
971
972 spin_lock_irqsave (&lp->lock, flags);
973
974 if (lp->cmd_head != I596_NULL) {
975 lp->cmd_tail->v_next = cmd;
976 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
977 } else {
978 lp->cmd_head = cmd;
979 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
980 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
981 lp->scb.command = CUC_START;
982 CA(dev);
983 }
984 lp->cmd_tail = cmd;
985 lp->cmd_backlog++;
986
987 spin_unlock_irqrestore (&lp->lock, flags);
988
989 if (lp->cmd_backlog > max_cmd_backlog) {
990 unsigned long tickssofar = jiffies - lp->last_cmd;
991
992 if (tickssofar < ticks_limit)
993 return;
994
995 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
996
997 i596_reset(dev, lp, ioaddr);
998 }
999 }
1000
1001 static int i596_open(struct net_device *dev)
1002 {
1003 int res = 0;
1004
1005 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1006
1007 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1008 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1009 return -EAGAIN;
1010 }
1011 #ifdef ENABLE_MVME16x_NET
1012 if (MACH_IS_MVME16x) {
1013 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1014 return -EAGAIN;
1015 }
1016 #endif
1017 init_rx_bufs(dev);
1018
1019 netif_start_queue(dev);
1020
1021 /* Initialize the 82596 memory */
1022 if (init_i596_mem(dev)) {
1023 res = -EAGAIN;
1024 free_irq(dev->irq, dev);
1025 }
1026
1027 return res;
1028 }
1029
1030 static void i596_tx_timeout (struct net_device *dev)
1031 {
1032 struct i596_private *lp = dev->priv;
1033 int ioaddr = dev->base_addr;
1034
1035 /* Transmitter timeout, serious problems. */
1036 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1037 dev->name));
1038
1039 dev->stats.tx_errors++;
1040
1041 /* Try to restart the adaptor */
1042 if (lp->last_restart == dev->stats.tx_packets) {
1043 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1044 /* Shutdown and restart */
1045 i596_reset (dev, lp, ioaddr);
1046 } else {
1047 /* Issue a channel attention signal */
1048 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1049 lp->scb.command = CUC_START | RX_START;
1050 CA (dev);
1051 lp->last_restart = dev->stats.tx_packets;
1052 }
1053
1054 dev->trans_start = jiffies;
1055 netif_wake_queue (dev);
1056 }
1057
1058
1059 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1060 {
1061 struct i596_private *lp = dev->priv;
1062 struct tx_cmd *tx_cmd;
1063 struct i596_tbd *tbd;
1064 short length = skb->len;
1065 dev->trans_start = jiffies;
1066
1067 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1068 dev->name, skb->len, skb->data));
1069
1070 if (skb->len < ETH_ZLEN) {
1071 if (skb_padto(skb, ETH_ZLEN))
1072 return 0;
1073 length = ETH_ZLEN;
1074 }
1075 netif_stop_queue(dev);
1076
1077 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1078 tbd = lp->tbds + lp->next_tx_cmd;
1079
1080 if (tx_cmd->cmd.command) {
1081 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1082 dev->name);
1083 dev->stats.tx_dropped++;
1084
1085 dev_kfree_skb(skb);
1086 } else {
1087 if (++lp->next_tx_cmd == TX_RING_SIZE)
1088 lp->next_tx_cmd = 0;
1089 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1090 tbd->next = I596_NULL;
1091
1092 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1093 tx_cmd->skb = skb;
1094
1095 tx_cmd->pad = 0;
1096 tx_cmd->size = 0;
1097 tbd->pad = 0;
1098 tbd->size = EOF | length;
1099
1100 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1101
1102 #ifdef __mc68000__
1103 cache_push(virt_to_phys(skb->data), length);
1104 #endif
1105 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1106 i596_add_cmd(dev, &tx_cmd->cmd);
1107
1108 dev->stats.tx_packets++;
1109 dev->stats.tx_bytes += length;
1110 }
1111
1112 netif_start_queue(dev);
1113
1114 return 0;
1115 }
1116
1117 static void print_eth(unsigned char *add, char *str)
1118 {
1119 DECLARE_MAC_BUF(mac);
1120 DECLARE_MAC_BUF(mac2);
1121
1122 printk(KERN_DEBUG "i596 0x%p, %s --> %s %02X%02X, %s\n",
1123 add, print_mac(mac, add + 6), print_mac(mac2, add),
1124 add[12], add[13], str);
1125 }
1126
1127 static int io = 0x300;
1128 static int irq = 10;
1129
1130 struct net_device * __init i82596_probe(int unit)
1131 {
1132 struct net_device *dev;
1133 int i;
1134 struct i596_private *lp;
1135 char eth_addr[8];
1136 static int probed;
1137 int err;
1138
1139 if (probed)
1140 return ERR_PTR(-ENODEV);
1141 probed++;
1142
1143 dev = alloc_etherdev(0);
1144 if (!dev)
1145 return ERR_PTR(-ENOMEM);
1146
1147 if (unit >= 0) {
1148 sprintf(dev->name, "eth%d", unit);
1149 netdev_boot_setup_check(dev);
1150 } else {
1151 dev->base_addr = io;
1152 dev->irq = irq;
1153 }
1154
1155 #ifdef ENABLE_MVME16x_NET
1156 if (MACH_IS_MVME16x) {
1157 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1158 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1159 err = -ENODEV;
1160 goto out;
1161 }
1162 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1163 dev->base_addr = MVME_I596_BASE;
1164 dev->irq = (unsigned) MVME16x_IRQ_I596;
1165 }
1166 #endif
1167 #ifdef ENABLE_BVME6000_NET
1168 if (MACH_IS_BVME6000) {
1169 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1170 unsigned char msr = rtc[3];
1171 int i;
1172
1173 rtc[3] |= 0x80;
1174 for (i = 0; i < 6; i++)
1175 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1176 rtc[3] = msr;
1177 dev->base_addr = BVME_I596_BASE;
1178 dev->irq = (unsigned) BVME_IRQ_I596;
1179 }
1180 #endif
1181 #ifdef ENABLE_APRICOT
1182 {
1183 int checksum = 0;
1184 int ioaddr = 0x300;
1185
1186 /* this is easy the ethernet interface can only be at 0x300 */
1187 /* first check nothing is already registered here */
1188
1189 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1190 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1191 err = -EBUSY;
1192 goto out;
1193 }
1194
1195 dev->base_addr = ioaddr;
1196
1197 for (i = 0; i < 8; i++) {
1198 eth_addr[i] = inb(ioaddr + 8 + i);
1199 checksum += eth_addr[i];
1200 }
1201
1202 /* checksum is a multiple of 0x100, got this wrong first time
1203 some machines have 0x100, some 0x200. The DOS driver doesn't
1204 even bother with the checksum.
1205 Some other boards trip the checksum.. but then appear as
1206 ether address 0. Trap these - AC */
1207
1208 if ((checksum % 0x100) ||
1209 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1210 err = -ENODEV;
1211 goto out1;
1212 }
1213
1214 dev->irq = 10;
1215 }
1216 #endif
1217 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1218 if (!dev->mem_start) {
1219 err = -ENOMEM;
1220 goto out1;
1221 }
1222
1223 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1224
1225 for (i = 0; i < 6; i++)
1226 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1227
1228 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1229
1230 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1231
1232 /* The 82596-specific entries in the device structure. */
1233 dev->open = i596_open;
1234 dev->stop = i596_close;
1235 dev->hard_start_xmit = i596_start_xmit;
1236 dev->set_multicast_list = set_multicast_list;
1237 dev->tx_timeout = i596_tx_timeout;
1238 dev->watchdog_timeo = TX_TIMEOUT;
1239
1240 dev->priv = (void *)(dev->mem_start);
1241
1242 lp = dev->priv;
1243 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1244 "lp->scb at 0x%08lx\n",
1245 dev->name, (unsigned long)lp,
1246 sizeof(struct i596_private), (unsigned long)&lp->scb));
1247 memset((void *) lp, 0, sizeof(struct i596_private));
1248
1249 #ifdef __mc68000__
1250 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1251 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1252 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1253 #endif
1254 lp->scb.command = 0;
1255 lp->scb.cmd = I596_NULL;
1256 lp->scb.rfd = I596_NULL;
1257 spin_lock_init(&lp->lock);
1258
1259 err = register_netdev(dev);
1260 if (err)
1261 goto out2;
1262 return dev;
1263 out2:
1264 #ifdef __mc68000__
1265 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1266 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1267 */
1268 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1269 IOMAP_FULL_CACHING);
1270 #endif
1271 free_page ((u32)(dev->mem_start));
1272 out1:
1273 #ifdef ENABLE_APRICOT
1274 release_region(dev->base_addr, I596_TOTAL_SIZE);
1275 #endif
1276 out:
1277 free_netdev(dev);
1278 return ERR_PTR(err);
1279 }
1280
1281 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1282 {
1283 struct net_device *dev = dev_id;
1284 struct i596_private *lp;
1285 short ioaddr;
1286 unsigned short status, ack_cmd = 0;
1287 int handled = 0;
1288
1289 #ifdef ENABLE_BVME6000_NET
1290 if (MACH_IS_BVME6000) {
1291 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1292 i596_error(irq, dev_id);
1293 return IRQ_HANDLED;
1294 }
1295 }
1296 #endif
1297 if (dev == NULL) {
1298 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1299 return IRQ_NONE;
1300 }
1301
1302 ioaddr = dev->base_addr;
1303 lp = dev->priv;
1304
1305 spin_lock (&lp->lock);
1306
1307 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1308 status = lp->scb.status;
1309
1310 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1311 dev->name, irq, status));
1312
1313 ack_cmd = status & 0xf000;
1314
1315 if ((status & 0x8000) || (status & 0x2000)) {
1316 struct i596_cmd *ptr;
1317
1318 handled = 1;
1319 if ((status & 0x8000))
1320 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1321 if ((status & 0x2000))
1322 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1323
1324 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1325 ptr = lp->cmd_head;
1326
1327 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1328 lp->cmd_head->status, lp->cmd_head->command));
1329 lp->cmd_head = ptr->v_next;
1330 lp->cmd_backlog--;
1331
1332 switch ((ptr->command) & 0x7) {
1333 case CmdTx:
1334 {
1335 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1336 struct sk_buff *skb = tx_cmd->skb;
1337
1338 if ((ptr->status) & STAT_OK) {
1339 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1340 } else {
1341 dev->stats.tx_errors++;
1342 if ((ptr->status) & 0x0020)
1343 dev->stats.collisions++;
1344 if (!((ptr->status) & 0x0040))
1345 dev->stats.tx_heartbeat_errors++;
1346 if ((ptr->status) & 0x0400)
1347 dev->stats.tx_carrier_errors++;
1348 if ((ptr->status) & 0x0800)
1349 dev->stats.collisions++;
1350 if ((ptr->status) & 0x1000)
1351 dev->stats.tx_aborted_errors++;
1352 }
1353
1354 dev_kfree_skb_irq(skb);
1355
1356 tx_cmd->cmd.command = 0; /* Mark free */
1357 break;
1358 }
1359 case CmdTDR:
1360 {
1361 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1362
1363 if (status & 0x8000) {
1364 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1365 } else {
1366 if (status & 0x4000)
1367 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1368 if (status & 0x2000)
1369 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1370 if (status & 0x1000)
1371 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1372
1373 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1374 }
1375 break;
1376 }
1377 case CmdConfigure:
1378 case CmdMulticastList:
1379 /* Zap command so set_multicast_list() knows it is free */
1380 ptr->command = 0;
1381 break;
1382 }
1383 ptr->v_next = ptr->b_next = I596_NULL;
1384 lp->last_cmd = jiffies;
1385 }
1386
1387 ptr = lp->cmd_head;
1388 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1389 ptr->command &= 0x1fff;
1390 ptr = ptr->v_next;
1391 }
1392
1393 if ((lp->cmd_head != I596_NULL))
1394 ack_cmd |= CUC_START;
1395 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1396 }
1397 if ((status & 0x1000) || (status & 0x4000)) {
1398 if ((status & 0x4000))
1399 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1400 i596_rx(dev);
1401 /* Only RX_START if stopped - RGH 07-07-96 */
1402 if (status & 0x1000) {
1403 if (netif_running(dev)) {
1404 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1405 ack_cmd |= RX_START;
1406 dev->stats.rx_errors++;
1407 dev->stats.rx_fifo_errors++;
1408 rebuild_rx_bufs(dev);
1409 }
1410 }
1411 }
1412 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1413 lp->scb.command = ack_cmd;
1414
1415 #ifdef ENABLE_MVME16x_NET
1416 if (MACH_IS_MVME16x) {
1417 /* Ack the interrupt */
1418
1419 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1420
1421 pcc2[0x2a] |= 0x08;
1422 }
1423 #endif
1424 #ifdef ENABLE_BVME6000_NET
1425 if (MACH_IS_BVME6000) {
1426 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1427
1428 *ethirq = 1;
1429 *ethirq = 3;
1430 }
1431 #endif
1432 #ifdef ENABLE_APRICOT
1433 (void) inb(ioaddr + 0x10);
1434 outb(4, ioaddr + 0xf);
1435 #endif
1436 CA(dev);
1437
1438 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1439
1440 spin_unlock (&lp->lock);
1441 return IRQ_RETVAL(handled);
1442 }
1443
1444 static int i596_close(struct net_device *dev)
1445 {
1446 struct i596_private *lp = dev->priv;
1447 unsigned long flags;
1448
1449 netif_stop_queue(dev);
1450
1451 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1452 dev->name, lp->scb.status));
1453
1454 spin_lock_irqsave(&lp->lock, flags);
1455
1456 wait_cmd(dev,lp,100,"close1 timed out");
1457 lp->scb.command = CUC_ABORT | RX_ABORT;
1458 CA(dev);
1459
1460 wait_cmd(dev,lp,100,"close2 timed out");
1461
1462 spin_unlock_irqrestore(&lp->lock, flags);
1463 DEB(DEB_STRUCT,i596_display_data(dev));
1464 i596_cleanup_cmd(dev,lp);
1465
1466 #ifdef ENABLE_MVME16x_NET
1467 if (MACH_IS_MVME16x) {
1468 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1469
1470 /* Disable all ints */
1471 pcc2[0x28] = 1;
1472 pcc2[0x2a] = 0x40;
1473 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1474 }
1475 #endif
1476 #ifdef ENABLE_BVME6000_NET
1477 if (MACH_IS_BVME6000) {
1478 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1479
1480 *ethirq = 1;
1481 }
1482 #endif
1483
1484 free_irq(dev->irq, dev);
1485 remove_rx_bufs(dev);
1486
1487 return 0;
1488 }
1489
1490 /*
1491 * Set or clear the multicast filter for this adaptor.
1492 */
1493
1494 static void set_multicast_list(struct net_device *dev)
1495 {
1496 struct i596_private *lp = dev->priv;
1497 int config = 0, cnt;
1498
1499 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1500 dev->name, dev->mc_count,
1501 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1502 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1503
1504 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1505 return;
1506
1507 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1508 lp->cf_cmd.i596_config[8] |= 0x01;
1509 config = 1;
1510 }
1511 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1512 lp->cf_cmd.i596_config[8] &= ~0x01;
1513 config = 1;
1514 }
1515 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1516 lp->cf_cmd.i596_config[11] &= ~0x20;
1517 config = 1;
1518 }
1519 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1520 lp->cf_cmd.i596_config[11] |= 0x20;
1521 config = 1;
1522 }
1523 if (config) {
1524 lp->cf_cmd.cmd.command = CmdConfigure;
1525 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1526 }
1527
1528 cnt = dev->mc_count;
1529 if (cnt > MAX_MC_CNT)
1530 {
1531 cnt = MAX_MC_CNT;
1532 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1533 dev->name, cnt);
1534 }
1535
1536 if (dev->mc_count > 0) {
1537 struct dev_mc_list *dmi;
1538 unsigned char *cp;
1539 struct mc_cmd *cmd;
1540 DECLARE_MAC_BUF(mac);
1541
1542 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1543 return;
1544 cmd = &lp->mc_cmd;
1545 cmd->cmd.command = CmdMulticastList;
1546 cmd->mc_cnt = dev->mc_count * 6;
1547 cp = cmd->mc_addrs;
1548 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1549 memcpy(cp, dmi->dmi_addr, 6);
1550 if (i596_debug > 1)
1551 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %s\n",
1552 dev->name, print_mac(mac, cp)));
1553 }
1554 i596_add_cmd(dev, &cmd->cmd);
1555 }
1556 }
1557
1558 #ifdef MODULE
1559 static struct net_device *dev_82596;
1560
1561 #ifdef ENABLE_APRICOT
1562 module_param(irq, int, 0);
1563 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1564 #endif
1565
1566 static int debug = -1;
1567 module_param(debug, int, 0);
1568 MODULE_PARM_DESC(debug, "i82596 debug mask");
1569
1570 int __init init_module(void)
1571 {
1572 if (debug >= 0)
1573 i596_debug = debug;
1574 dev_82596 = i82596_probe(-1);
1575 if (IS_ERR(dev_82596))
1576 return PTR_ERR(dev_82596);
1577 return 0;
1578 }
1579
1580 void __exit cleanup_module(void)
1581 {
1582 unregister_netdev(dev_82596);
1583 #ifdef __mc68000__
1584 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1585 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1586 */
1587
1588 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1589 IOMAP_FULL_CACHING);
1590 #endif
1591 free_page ((u32)(dev_82596->mem_start));
1592 #ifdef ENABLE_APRICOT
1593 /* If we don't do this, we can't re-insmod it later. */
1594 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1595 #endif
1596 free_netdev(dev_82596);
1597 }
1598
1599 #endif /* MODULE */
1600
1601 /*
1602 * Local variables:
1603 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
1604 * End:
1605 */
WRT350N Kernel Patches