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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/mini2440.git] / drivers / net / 82596.c
blobcca94b9c08ae5360428554fcff302620009488b4
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->ml_priv;
461 struct i596_cmd *cmd;
462 struct i596_rfd *rfd;
463 struct i596_rbd *rbd;
464
465 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
466 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
467 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
468 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
469 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
470 " .cmd = %p, .rfd = %p\n",
471 &lp->scb, lp->scb.status, lp->scb.command,
472 lp->scb.cmd, lp->scb.rfd);
473 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
474 " over %lx, rcvdt %lx, short %lx\n",
475 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
476 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
477 cmd = lp->cmd_head;
478 while (cmd != I596_NULL) {
479 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
480 cmd, cmd->status, cmd->command, cmd->b_next);
481 cmd = cmd->v_next;
482 }
483 rfd = lp->rfd_head;
484 printk(KERN_ERR "rfd_head = %p\n", rfd);
485 do {
486 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
487 " count %04x\n",
488 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
489 rfd->count);
490 rfd = rfd->v_next;
491 } while (rfd != lp->rfd_head);
492 rbd = lp->rbd_head;
493 printk(KERN_ERR "rbd_head = %p\n", rbd);
494 do {
495 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
496 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
497 rbd = rbd->v_next;
498 } while (rbd != lp->rbd_head);
499 }
500
501
502 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
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->ml_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->ml_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->ml_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->ml_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->ml_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->stats.rx_packets++;
845 dev->stats.rx_bytes+=pkt_len;
846 }
847 }
848 else {
849 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
850 dev->name, rfd->stat));
851 dev->stats.rx_errors++;
852 if ((rfd->stat) & 0x0001)
853 dev->stats.collisions++;
854 if ((rfd->stat) & 0x0080)
855 dev->stats.rx_length_errors++;
856 if ((rfd->stat) & 0x0100)
857 dev->stats.rx_over_errors++;
858 if ((rfd->stat) & 0x0200)
859 dev->stats.rx_fifo_errors++;
860 if ((rfd->stat) & 0x0400)
861 dev->stats.rx_frame_errors++;
862 if ((rfd->stat) & 0x0800)
863 dev->stats.rx_crc_errors++;
864 if ((rfd->stat) & 0x1000)
865 dev->stats.rx_length_errors++;
866 }
867
868 /* Clear the buffer descriptor count and EOF + F flags */
869
870 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
871 rbd->count = 0;
872 lp->rbd_head = rbd->v_next;
873 }
874
875 /* Tidy the frame descriptor, marking it as end of list */
876
877 rfd->rbd = I596_NULL;
878 rfd->stat = 0;
879 rfd->cmd = CMD_EOL|CMD_FLEX;
880 rfd->count = 0;
881
882 /* Remove end-of-list from old end descriptor */
883
884 rfd->v_prev->cmd = CMD_FLEX;
885
886 /* Update record of next frame descriptor to process */
887
888 lp->scb.rfd = rfd->b_next;
889 lp->rfd_head = rfd->v_next;
890 rfd = lp->rfd_head;
891 }
892
893 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
894
895 return 0;
896 }
897
898
899 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
900 {
901 struct i596_cmd *ptr;
902
903 while (lp->cmd_head != I596_NULL) {
904 ptr = lp->cmd_head;
905 lp->cmd_head = ptr->v_next;
906 lp->cmd_backlog--;
907
908 switch ((ptr->command) & 0x7) {
909 case CmdTx:
910 {
911 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
912 struct sk_buff *skb = tx_cmd->skb;
913
914 dev_kfree_skb(skb);
915
916 dev->stats.tx_errors++;
917 dev->stats.tx_aborted_errors++;
918
919 ptr->v_next = ptr->b_next = I596_NULL;
920 tx_cmd->cmd.command = 0; /* Mark as free */
921 break;
922 }
923 default:
924 ptr->v_next = ptr->b_next = I596_NULL;
925 }
926 }
927
928 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
929 lp->scb.cmd = I596_NULL;
930 }
931
932 static void i596_reset(struct net_device *dev, struct i596_private *lp,
933 int ioaddr)
934 {
935 unsigned long flags;
936
937 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
938
939 spin_lock_irqsave (&lp->lock, flags);
940
941 wait_cmd(dev,lp,100,"i596_reset timed out");
942
943 netif_stop_queue(dev);
944
945 lp->scb.command = CUC_ABORT | RX_ABORT;
946 CA(dev);
947
948 /* wait for shutdown */
949 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
950 spin_unlock_irqrestore (&lp->lock, flags);
951
952 i596_cleanup_cmd(dev,lp);
953 i596_rx(dev);
954
955 netif_start_queue(dev);
956 init_i596_mem(dev);
957 }
958
959 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
960 {
961 struct i596_private *lp = dev->ml_priv;
962 int ioaddr = dev->base_addr;
963 unsigned long flags;
964
965 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
966
967 cmd->status = 0;
968 cmd->command |= (CMD_EOL | CMD_INTR);
969 cmd->v_next = cmd->b_next = I596_NULL;
970
971 spin_lock_irqsave (&lp->lock, flags);
972
973 if (lp->cmd_head != I596_NULL) {
974 lp->cmd_tail->v_next = cmd;
975 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
976 } else {
977 lp->cmd_head = cmd;
978 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
979 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
980 lp->scb.command = CUC_START;
981 CA(dev);
982 }
983 lp->cmd_tail = cmd;
984 lp->cmd_backlog++;
985
986 spin_unlock_irqrestore (&lp->lock, flags);
987
988 if (lp->cmd_backlog > max_cmd_backlog) {
989 unsigned long tickssofar = jiffies - lp->last_cmd;
990
991 if (tickssofar < ticks_limit)
992 return;
993
994 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
995
996 i596_reset(dev, lp, ioaddr);
997 }
998 }
999
1000 static int i596_open(struct net_device *dev)
1001 {
1002 int res = 0;
1003
1004 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
1005
1006 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
1007 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
1008 return -EAGAIN;
1009 }
1010 #ifdef ENABLE_MVME16x_NET
1011 if (MACH_IS_MVME16x) {
1012 if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
1013 return -EAGAIN;
1014 }
1015 #endif
1016 init_rx_bufs(dev);
1017
1018 netif_start_queue(dev);
1019
1020 /* Initialize the 82596 memory */
1021 if (init_i596_mem(dev)) {
1022 res = -EAGAIN;
1023 free_irq(dev->irq, dev);
1024 }
1025
1026 return res;
1027 }
1028
1029 static void i596_tx_timeout (struct net_device *dev)
1030 {
1031 struct i596_private *lp = dev->ml_priv;
1032 int ioaddr = dev->base_addr;
1033
1034 /* Transmitter timeout, serious problems. */
1035 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1036 dev->name));
1037
1038 dev->stats.tx_errors++;
1039
1040 /* Try to restart the adaptor */
1041 if (lp->last_restart == dev->stats.tx_packets) {
1042 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1043 /* Shutdown and restart */
1044 i596_reset (dev, lp, ioaddr);
1045 } else {
1046 /* Issue a channel attention signal */
1047 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1048 lp->scb.command = CUC_START | RX_START;
1049 CA (dev);
1050 lp->last_restart = dev->stats.tx_packets;
1051 }
1052
1053 dev->trans_start = jiffies;
1054 netif_wake_queue (dev);
1055 }
1056
1057
1058 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1059 {
1060 struct i596_private *lp = dev->ml_priv;
1061 struct tx_cmd *tx_cmd;
1062 struct i596_tbd *tbd;
1063 short length = skb->len;
1064 dev->trans_start = jiffies;
1065
1066 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1067 dev->name, skb->len, skb->data));
1068
1069 if (skb->len < ETH_ZLEN) {
1070 if (skb_padto(skb, ETH_ZLEN))
1071 return 0;
1072 length = ETH_ZLEN;
1073 }
1074 netif_stop_queue(dev);
1075
1076 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1077 tbd = lp->tbds + lp->next_tx_cmd;
1078
1079 if (tx_cmd->cmd.command) {
1080 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1081 dev->name);
1082 dev->stats.tx_dropped++;
1083
1084 dev_kfree_skb(skb);
1085 } else {
1086 if (++lp->next_tx_cmd == TX_RING_SIZE)
1087 lp->next_tx_cmd = 0;
1088 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1089 tbd->next = I596_NULL;
1090
1091 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1092 tx_cmd->skb = skb;
1093
1094 tx_cmd->pad = 0;
1095 tx_cmd->size = 0;
1096 tbd->pad = 0;
1097 tbd->size = EOF | length;
1098
1099 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1100
1101 #ifdef __mc68000__
1102 cache_push(virt_to_phys(skb->data), length);
1103 #endif
1104 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1105 i596_add_cmd(dev, &tx_cmd->cmd);
1106
1107 dev->stats.tx_packets++;
1108 dev->stats.tx_bytes += length;
1109 }
1110
1111 netif_start_queue(dev);
1112
1113 return 0;
1114 }
1115
1116 static void print_eth(unsigned char *add, char *str)
1117 {
1118 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1119 add, add + 6, add, add[12], add[13], str);
1120 }
1121
1122 static int io = 0x300;
1123 static int irq = 10;
1124
1125 static const struct net_device_ops i596_netdev_ops = {
1126 .ndo_open = i596_open,
1127 .ndo_stop = i596_close,
1128 .ndo_start_xmit = i596_start_xmit,
1129 .ndo_set_multicast_list = set_multicast_list,
1130 .ndo_tx_timeout = i596_tx_timeout,
1131 .ndo_change_mtu = eth_change_mtu,
1132 .ndo_set_mac_address = eth_mac_addr,
1133 .ndo_validate_addr = eth_validate_addr,
1134 };
1135
1136 struct net_device * __init i82596_probe(int unit)
1137 {
1138 struct net_device *dev;
1139 int i;
1140 struct i596_private *lp;
1141 char eth_addr[8];
1142 static int probed;
1143 int err;
1144
1145 if (probed)
1146 return ERR_PTR(-ENODEV);
1147 probed++;
1148
1149 dev = alloc_etherdev(0);
1150 if (!dev)
1151 return ERR_PTR(-ENOMEM);
1152
1153 if (unit >= 0) {
1154 sprintf(dev->name, "eth%d", unit);
1155 netdev_boot_setup_check(dev);
1156 } else {
1157 dev->base_addr = io;
1158 dev->irq = irq;
1159 }
1160
1161 #ifdef ENABLE_MVME16x_NET
1162 if (MACH_IS_MVME16x) {
1163 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1164 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1165 err = -ENODEV;
1166 goto out;
1167 }
1168 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1169 dev->base_addr = MVME_I596_BASE;
1170 dev->irq = (unsigned) MVME16x_IRQ_I596;
1171 goto found;
1172 }
1173 #endif
1174 #ifdef ENABLE_BVME6000_NET
1175 if (MACH_IS_BVME6000) {
1176 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1177 unsigned char msr = rtc[3];
1178 int i;
1179
1180 rtc[3] |= 0x80;
1181 for (i = 0; i < 6; i++)
1182 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1183 rtc[3] = msr;
1184 dev->base_addr = BVME_I596_BASE;
1185 dev->irq = (unsigned) BVME_IRQ_I596;
1186 goto found;
1187 }
1188 #endif
1189 #ifdef ENABLE_APRICOT
1190 {
1191 int checksum = 0;
1192 int ioaddr = 0x300;
1193
1194 /* this is easy the ethernet interface can only be at 0x300 */
1195 /* first check nothing is already registered here */
1196
1197 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1198 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1199 err = -EBUSY;
1200 goto out;
1201 }
1202
1203 dev->base_addr = ioaddr;
1204
1205 for (i = 0; i < 8; i++) {
1206 eth_addr[i] = inb(ioaddr + 8 + i);
1207 checksum += eth_addr[i];
1208 }
1209
1210 /* checksum is a multiple of 0x100, got this wrong first time
1211 some machines have 0x100, some 0x200. The DOS driver doesn't
1212 even bother with the checksum.
1213 Some other boards trip the checksum.. but then appear as
1214 ether address 0. Trap these - AC */
1215
1216 if ((checksum % 0x100) ||
1217 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1218 err = -ENODEV;
1219 goto out1;
1220 }
1221
1222 dev->irq = 10;
1223 goto found;
1224 }
1225 #endif
1226 err = -ENODEV;
1227 goto out;
1228
1229 found:
1230 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1231 if (!dev->mem_start) {
1232 err = -ENOMEM;
1233 goto out1;
1234 }
1235
1236 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1237
1238 for (i = 0; i < 6; i++)
1239 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1240
1241 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1242
1243 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1244
1245 /* The 82596-specific entries in the device structure. */
1246 dev->netdev_ops = &i596_netdev_ops;
1247 dev->watchdog_timeo = TX_TIMEOUT;
1248
1249 dev->ml_priv = (void *)(dev->mem_start);
1250
1251 lp = dev->ml_priv;
1252 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1253 "lp->scb at 0x%08lx\n",
1254 dev->name, (unsigned long)lp,
1255 sizeof(struct i596_private), (unsigned long)&lp->scb));
1256 memset((void *) lp, 0, sizeof(struct i596_private));
1257
1258 #ifdef __mc68000__
1259 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1260 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1261 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1262 #endif
1263 lp->scb.command = 0;
1264 lp->scb.cmd = I596_NULL;
1265 lp->scb.rfd = I596_NULL;
1266 spin_lock_init(&lp->lock);
1267
1268 err = register_netdev(dev);
1269 if (err)
1270 goto out2;
1271 return dev;
1272 out2:
1273 #ifdef __mc68000__
1274 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1275 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1276 */
1277 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1278 IOMAP_FULL_CACHING);
1279 #endif
1280 free_page ((u32)(dev->mem_start));
1281 out1:
1282 #ifdef ENABLE_APRICOT
1283 release_region(dev->base_addr, I596_TOTAL_SIZE);
1284 #endif
1285 out:
1286 free_netdev(dev);
1287 return ERR_PTR(err);
1288 }
1289
1290 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1291 {
1292 struct net_device *dev = dev_id;
1293 struct i596_private *lp;
1294 short ioaddr;
1295 unsigned short status, ack_cmd = 0;
1296 int handled = 0;
1297
1298 #ifdef ENABLE_BVME6000_NET
1299 if (MACH_IS_BVME6000) {
1300 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1301 i596_error(irq, dev_id);
1302 return IRQ_HANDLED;
1303 }
1304 }
1305 #endif
1306 if (dev == NULL) {
1307 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1308 return IRQ_NONE;
1309 }
1310
1311 ioaddr = dev->base_addr;
1312 lp = dev->ml_priv;
1313
1314 spin_lock (&lp->lock);
1315
1316 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1317 status = lp->scb.status;
1318
1319 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1320 dev->name, irq, status));
1321
1322 ack_cmd = status & 0xf000;
1323
1324 if ((status & 0x8000) || (status & 0x2000)) {
1325 struct i596_cmd *ptr;
1326
1327 handled = 1;
1328 if ((status & 0x8000))
1329 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1330 if ((status & 0x2000))
1331 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1332
1333 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1334 ptr = lp->cmd_head;
1335
1336 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1337 lp->cmd_head->status, lp->cmd_head->command));
1338 lp->cmd_head = ptr->v_next;
1339 lp->cmd_backlog--;
1340
1341 switch ((ptr->command) & 0x7) {
1342 case CmdTx:
1343 {
1344 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1345 struct sk_buff *skb = tx_cmd->skb;
1346
1347 if ((ptr->status) & STAT_OK) {
1348 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1349 } else {
1350 dev->stats.tx_errors++;
1351 if ((ptr->status) & 0x0020)
1352 dev->stats.collisions++;
1353 if (!((ptr->status) & 0x0040))
1354 dev->stats.tx_heartbeat_errors++;
1355 if ((ptr->status) & 0x0400)
1356 dev->stats.tx_carrier_errors++;
1357 if ((ptr->status) & 0x0800)
1358 dev->stats.collisions++;
1359 if ((ptr->status) & 0x1000)
1360 dev->stats.tx_aborted_errors++;
1361 }
1362
1363 dev_kfree_skb_irq(skb);
1364
1365 tx_cmd->cmd.command = 0; /* Mark free */
1366 break;
1367 }
1368 case CmdTDR:
1369 {
1370 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1371
1372 if (status & 0x8000) {
1373 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1374 } else {
1375 if (status & 0x4000)
1376 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1377 if (status & 0x2000)
1378 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1379 if (status & 0x1000)
1380 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1381
1382 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1383 }
1384 break;
1385 }
1386 case CmdConfigure:
1387 case CmdMulticastList:
1388 /* Zap command so set_multicast_list() knows it is free */
1389 ptr->command = 0;
1390 break;
1391 }
1392 ptr->v_next = ptr->b_next = I596_NULL;
1393 lp->last_cmd = jiffies;
1394 }
1395
1396 ptr = lp->cmd_head;
1397 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1398 ptr->command &= 0x1fff;
1399 ptr = ptr->v_next;
1400 }
1401
1402 if ((lp->cmd_head != I596_NULL))
1403 ack_cmd |= CUC_START;
1404 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1405 }
1406 if ((status & 0x1000) || (status & 0x4000)) {
1407 if ((status & 0x4000))
1408 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1409 i596_rx(dev);
1410 /* Only RX_START if stopped - RGH 07-07-96 */
1411 if (status & 0x1000) {
1412 if (netif_running(dev)) {
1413 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1414 ack_cmd |= RX_START;
1415 dev->stats.rx_errors++;
1416 dev->stats.rx_fifo_errors++;
1417 rebuild_rx_bufs(dev);
1418 }
1419 }
1420 }
1421 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1422 lp->scb.command = ack_cmd;
1423
1424 #ifdef ENABLE_MVME16x_NET
1425 if (MACH_IS_MVME16x) {
1426 /* Ack the interrupt */
1427
1428 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1429
1430 pcc2[0x2a] |= 0x08;
1431 }
1432 #endif
1433 #ifdef ENABLE_BVME6000_NET
1434 if (MACH_IS_BVME6000) {
1435 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1436
1437 *ethirq = 1;
1438 *ethirq = 3;
1439 }
1440 #endif
1441 #ifdef ENABLE_APRICOT
1442 (void) inb(ioaddr + 0x10);
1443 outb(4, ioaddr + 0xf);
1444 #endif
1445 CA(dev);
1446
1447 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1448
1449 spin_unlock (&lp->lock);
1450 return IRQ_RETVAL(handled);
1451 }
1452
1453 static int i596_close(struct net_device *dev)
1454 {
1455 struct i596_private *lp = dev->ml_priv;
1456 unsigned long flags;
1457
1458 netif_stop_queue(dev);
1459
1460 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1461 dev->name, lp->scb.status));
1462
1463 spin_lock_irqsave(&lp->lock, flags);
1464
1465 wait_cmd(dev,lp,100,"close1 timed out");
1466 lp->scb.command = CUC_ABORT | RX_ABORT;
1467 CA(dev);
1468
1469 wait_cmd(dev,lp,100,"close2 timed out");
1470
1471 spin_unlock_irqrestore(&lp->lock, flags);
1472 DEB(DEB_STRUCT,i596_display_data(dev));
1473 i596_cleanup_cmd(dev,lp);
1474
1475 #ifdef ENABLE_MVME16x_NET
1476 if (MACH_IS_MVME16x) {
1477 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1478
1479 /* Disable all ints */
1480 pcc2[0x28] = 1;
1481 pcc2[0x2a] = 0x40;
1482 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1483 }
1484 #endif
1485 #ifdef ENABLE_BVME6000_NET
1486 if (MACH_IS_BVME6000) {
1487 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1488
1489 *ethirq = 1;
1490 }
1491 #endif
1492
1493 free_irq(dev->irq, dev);
1494 remove_rx_bufs(dev);
1495
1496 return 0;
1497 }
1498
1499 /*
1500 * Set or clear the multicast filter for this adaptor.
1501 */
1502
1503 static void set_multicast_list(struct net_device *dev)
1504 {
1505 struct i596_private *lp = dev->ml_priv;
1506 int config = 0, cnt;
1507
1508 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1509 dev->name, dev->mc_count,
1510 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1511 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1512
1513 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1514 return;
1515
1516 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1517 lp->cf_cmd.i596_config[8] |= 0x01;
1518 config = 1;
1519 }
1520 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1521 lp->cf_cmd.i596_config[8] &= ~0x01;
1522 config = 1;
1523 }
1524 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1525 lp->cf_cmd.i596_config[11] &= ~0x20;
1526 config = 1;
1527 }
1528 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1529 lp->cf_cmd.i596_config[11] |= 0x20;
1530 config = 1;
1531 }
1532 if (config) {
1533 lp->cf_cmd.cmd.command = CmdConfigure;
1534 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1535 }
1536
1537 cnt = dev->mc_count;
1538 if (cnt > MAX_MC_CNT)
1539 {
1540 cnt = MAX_MC_CNT;
1541 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1542 dev->name, cnt);
1543 }
1544
1545 if (dev->mc_count > 0) {
1546 struct dev_mc_list *dmi;
1547 unsigned char *cp;
1548 struct mc_cmd *cmd;
1549
1550 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1551 return;
1552 cmd = &lp->mc_cmd;
1553 cmd->cmd.command = CmdMulticastList;
1554 cmd->mc_cnt = dev->mc_count * 6;
1555 cp = cmd->mc_addrs;
1556 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1557 memcpy(cp, dmi->dmi_addr, 6);
1558 if (i596_debug > 1)
1559 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1560 dev->name, cp));
1561 }
1562 i596_add_cmd(dev, &cmd->cmd);
1563 }
1564 }
1565
1566 #ifdef MODULE
1567 static struct net_device *dev_82596;
1568
1569 #ifdef ENABLE_APRICOT
1570 module_param(irq, int, 0);
1571 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1572 #endif
1573
1574 static int debug = -1;
1575 module_param(debug, int, 0);
1576 MODULE_PARM_DESC(debug, "i82596 debug mask");
1577
1578 int __init init_module(void)
1579 {
1580 if (debug >= 0)
1581 i596_debug = debug;
1582 dev_82596 = i82596_probe(-1);
1583 if (IS_ERR(dev_82596))
1584 return PTR_ERR(dev_82596);
1585 return 0;
1586 }
1587
1588 void __exit cleanup_module(void)
1589 {
1590 unregister_netdev(dev_82596);
1591 #ifdef __mc68000__
1592 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1593 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1594 */
1595
1596 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1597 IOMAP_FULL_CACHING);
1598 #endif
1599 free_page ((u32)(dev_82596->mem_start));
1600 #ifdef ENABLE_APRICOT
1601 /* If we don't do this, we can't re-insmod it later. */
1602 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1603 #endif
1604 free_netdev(dev_82596);
1605 }
1606
1607 #endif /* MODULE */
Support for the Chinese Samsung S3C2440 based development boards