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MINI2440: Added new T35 (QVGA) and Innolux 5.6" (VGA) TFTs
[linux-2.6/mini2440.git] / drivers / net / 82596.c
blobea6b139b812cc62c348055eeb7f3c18c623ad91f
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 *)((long)x))
126 #define WSWAPrbd(x) ((struct i596_rbd *)((long)x))
127 #define WSWAPiscp(x) ((struct i596_iscp *)((long)x))
128 #define WSWAPscb(x) ((struct i596_scb *)((long)x))
129 #define WSWAPcmd(x) ((struct i596_cmd *)((long)x))
130 #define WSWAPtbd(x) ((struct i596_tbd *)((long)x))
131 #define WSWAPchar(x) ((char *)((long)x))
132 #define ISCP_BUSY 0x0001
133 #define MACH_IS_APRICOT 1
134 #endif
135
136 /*
137 * The MPU_PORT command allows direct access to the 82596. With PORT access
138 * the following commands are available (p5-18). The 32-bit port command
139 * must be word-swapped with the most significant word written first.
140 * This only applies to VME boards.
141 */
142 #define PORT_RESET 0x00 /* reset 82596 */
143 #define PORT_SELFTEST 0x01 /* selftest */
144 #define PORT_ALTSCP 0x02 /* alternate SCB address */
145 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
146
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 netdev_tx_t 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 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1058 {
1059 struct i596_private *lp = dev->ml_priv;
1060 struct tx_cmd *tx_cmd;
1061 struct i596_tbd *tbd;
1062 short length = skb->len;
1063 dev->trans_start = jiffies;
1064
1065 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1066 dev->name, skb->len, skb->data));
1067
1068 if (skb->len < ETH_ZLEN) {
1069 if (skb_padto(skb, ETH_ZLEN))
1070 return NETDEV_TX_OK;
1071 length = ETH_ZLEN;
1072 }
1073 netif_stop_queue(dev);
1074
1075 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1076 tbd = lp->tbds + lp->next_tx_cmd;
1077
1078 if (tx_cmd->cmd.command) {
1079 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1080 dev->name);
1081 dev->stats.tx_dropped++;
1082
1083 dev_kfree_skb(skb);
1084 } else {
1085 if (++lp->next_tx_cmd == TX_RING_SIZE)
1086 lp->next_tx_cmd = 0;
1087 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1088 tbd->next = I596_NULL;
1089
1090 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1091 tx_cmd->skb = skb;
1092
1093 tx_cmd->pad = 0;
1094 tx_cmd->size = 0;
1095 tbd->pad = 0;
1096 tbd->size = EOF | length;
1097
1098 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1099
1100 #ifdef __mc68000__
1101 cache_push(virt_to_phys(skb->data), length);
1102 #endif
1103 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1104 i596_add_cmd(dev, &tx_cmd->cmd);
1105
1106 dev->stats.tx_packets++;
1107 dev->stats.tx_bytes += length;
1108 }
1109
1110 netif_start_queue(dev);
1111
1112 return NETDEV_TX_OK;
1113 }
1114
1115 static void print_eth(unsigned char *add, char *str)
1116 {
1117 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1118 add, add + 6, add, add[12], add[13], str);
1119 }
1120
1121 static int io = 0x300;
1122 static int irq = 10;
1123
1124 static const struct net_device_ops i596_netdev_ops = {
1125 .ndo_open = i596_open,
1126 .ndo_stop = i596_close,
1127 .ndo_start_xmit = i596_start_xmit,
1128 .ndo_set_multicast_list = set_multicast_list,
1129 .ndo_tx_timeout = i596_tx_timeout,
1130 .ndo_change_mtu = eth_change_mtu,
1131 .ndo_set_mac_address = eth_mac_addr,
1132 .ndo_validate_addr = eth_validate_addr,
1133 };
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 goto found;
1171 }
1172 #endif
1173 #ifdef ENABLE_BVME6000_NET
1174 if (MACH_IS_BVME6000) {
1175 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1176 unsigned char msr = rtc[3];
1177 int i;
1178
1179 rtc[3] |= 0x80;
1180 for (i = 0; i < 6; i++)
1181 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1182 rtc[3] = msr;
1183 dev->base_addr = BVME_I596_BASE;
1184 dev->irq = (unsigned) BVME_IRQ_I596;
1185 goto found;
1186 }
1187 #endif
1188 #ifdef ENABLE_APRICOT
1189 {
1190 int checksum = 0;
1191 int ioaddr = 0x300;
1192
1193 /* this is easy the ethernet interface can only be at 0x300 */
1194 /* first check nothing is already registered here */
1195
1196 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
1197 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
1198 err = -EBUSY;
1199 goto out;
1200 }
1201
1202 dev->base_addr = ioaddr;
1203
1204 for (i = 0; i < 8; i++) {
1205 eth_addr[i] = inb(ioaddr + 8 + i);
1206 checksum += eth_addr[i];
1207 }
1208
1209 /* checksum is a multiple of 0x100, got this wrong first time
1210 some machines have 0x100, some 0x200. The DOS driver doesn't
1211 even bother with the checksum.
1212 Some other boards trip the checksum.. but then appear as
1213 ether address 0. Trap these - AC */
1214
1215 if ((checksum % 0x100) ||
1216 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
1217 err = -ENODEV;
1218 goto out1;
1219 }
1220
1221 dev->irq = 10;
1222 goto found;
1223 }
1224 #endif
1225 err = -ENODEV;
1226 goto out;
1227
1228 found:
1229 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1230 if (!dev->mem_start) {
1231 err = -ENOMEM;
1232 goto out1;
1233 }
1234
1235 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1236
1237 for (i = 0; i < 6; i++)
1238 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1239
1240 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1241
1242 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1243
1244 /* The 82596-specific entries in the device structure. */
1245 dev->netdev_ops = &i596_netdev_ops;
1246 dev->watchdog_timeo = TX_TIMEOUT;
1247
1248 dev->ml_priv = (void *)(dev->mem_start);
1249
1250 lp = dev->ml_priv;
1251 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1252 "lp->scb at 0x%08lx\n",
1253 dev->name, (unsigned long)lp,
1254 sizeof(struct i596_private), (unsigned long)&lp->scb));
1255 memset((void *) lp, 0, sizeof(struct i596_private));
1256
1257 #ifdef __mc68000__
1258 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1259 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1260 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1261 #endif
1262 lp->scb.command = 0;
1263 lp->scb.cmd = I596_NULL;
1264 lp->scb.rfd = I596_NULL;
1265 spin_lock_init(&lp->lock);
1266
1267 err = register_netdev(dev);
1268 if (err)
1269 goto out2;
1270 return dev;
1271 out2:
1272 #ifdef __mc68000__
1273 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1274 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1275 */
1276 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1277 IOMAP_FULL_CACHING);
1278 #endif
1279 free_page ((u32)(dev->mem_start));
1280 out1:
1281 #ifdef ENABLE_APRICOT
1282 release_region(dev->base_addr, I596_TOTAL_SIZE);
1283 #endif
1284 out:
1285 free_netdev(dev);
1286 return ERR_PTR(err);
1287 }
1288
1289 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1290 {
1291 struct net_device *dev = dev_id;
1292 struct i596_private *lp;
1293 short ioaddr;
1294 unsigned short status, ack_cmd = 0;
1295 int handled = 0;
1296
1297 #ifdef ENABLE_BVME6000_NET
1298 if (MACH_IS_BVME6000) {
1299 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1300 i596_error(irq, dev_id);
1301 return IRQ_HANDLED;
1302 }
1303 }
1304 #endif
1305 if (dev == NULL) {
1306 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1307 return IRQ_NONE;
1308 }
1309
1310 ioaddr = dev->base_addr;
1311 lp = dev->ml_priv;
1312
1313 spin_lock (&lp->lock);
1314
1315 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1316 status = lp->scb.status;
1317
1318 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1319 dev->name, irq, status));
1320
1321 ack_cmd = status & 0xf000;
1322
1323 if ((status & 0x8000) || (status & 0x2000)) {
1324 struct i596_cmd *ptr;
1325
1326 handled = 1;
1327 if ((status & 0x8000))
1328 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1329 if ((status & 0x2000))
1330 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1331
1332 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1333 ptr = lp->cmd_head;
1334
1335 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1336 lp->cmd_head->status, lp->cmd_head->command));
1337 lp->cmd_head = ptr->v_next;
1338 lp->cmd_backlog--;
1339
1340 switch ((ptr->command) & 0x7) {
1341 case CmdTx:
1342 {
1343 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1344 struct sk_buff *skb = tx_cmd->skb;
1345
1346 if ((ptr->status) & STAT_OK) {
1347 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1348 } else {
1349 dev->stats.tx_errors++;
1350 if ((ptr->status) & 0x0020)
1351 dev->stats.collisions++;
1352 if (!((ptr->status) & 0x0040))
1353 dev->stats.tx_heartbeat_errors++;
1354 if ((ptr->status) & 0x0400)
1355 dev->stats.tx_carrier_errors++;
1356 if ((ptr->status) & 0x0800)
1357 dev->stats.collisions++;
1358 if ((ptr->status) & 0x1000)
1359 dev->stats.tx_aborted_errors++;
1360 }
1361
1362 dev_kfree_skb_irq(skb);
1363
1364 tx_cmd->cmd.command = 0; /* Mark free */
1365 break;
1366 }
1367 case CmdTDR:
1368 {
1369 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1370
1371 if (status & 0x8000) {
1372 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1373 } else {
1374 if (status & 0x4000)
1375 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1376 if (status & 0x2000)
1377 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1378 if (status & 0x1000)
1379 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1380
1381 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1382 }
1383 break;
1384 }
1385 case CmdConfigure:
1386 case CmdMulticastList:
1387 /* Zap command so set_multicast_list() knows it is free */
1388 ptr->command = 0;
1389 break;
1390 }
1391 ptr->v_next = ptr->b_next = I596_NULL;
1392 lp->last_cmd = jiffies;
1393 }
1394
1395 ptr = lp->cmd_head;
1396 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1397 ptr->command &= 0x1fff;
1398 ptr = ptr->v_next;
1399 }
1400
1401 if ((lp->cmd_head != I596_NULL))
1402 ack_cmd |= CUC_START;
1403 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1404 }
1405 if ((status & 0x1000) || (status & 0x4000)) {
1406 if ((status & 0x4000))
1407 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1408 i596_rx(dev);
1409 /* Only RX_START if stopped - RGH 07-07-96 */
1410 if (status & 0x1000) {
1411 if (netif_running(dev)) {
1412 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1413 ack_cmd |= RX_START;
1414 dev->stats.rx_errors++;
1415 dev->stats.rx_fifo_errors++;
1416 rebuild_rx_bufs(dev);
1417 }
1418 }
1419 }
1420 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1421 lp->scb.command = ack_cmd;
1422
1423 #ifdef ENABLE_MVME16x_NET
1424 if (MACH_IS_MVME16x) {
1425 /* Ack the interrupt */
1426
1427 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1428
1429 pcc2[0x2a] |= 0x08;
1430 }
1431 #endif
1432 #ifdef ENABLE_BVME6000_NET
1433 if (MACH_IS_BVME6000) {
1434 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1435
1436 *ethirq = 1;
1437 *ethirq = 3;
1438 }
1439 #endif
1440 #ifdef ENABLE_APRICOT
1441 (void) inb(ioaddr + 0x10);
1442 outb(4, ioaddr + 0xf);
1443 #endif
1444 CA(dev);
1445
1446 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1447
1448 spin_unlock (&lp->lock);
1449 return IRQ_RETVAL(handled);
1450 }
1451
1452 static int i596_close(struct net_device *dev)
1453 {
1454 struct i596_private *lp = dev->ml_priv;
1455 unsigned long flags;
1456
1457 netif_stop_queue(dev);
1458
1459 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1460 dev->name, lp->scb.status));
1461
1462 spin_lock_irqsave(&lp->lock, flags);
1463
1464 wait_cmd(dev,lp,100,"close1 timed out");
1465 lp->scb.command = CUC_ABORT | RX_ABORT;
1466 CA(dev);
1467
1468 wait_cmd(dev,lp,100,"close2 timed out");
1469
1470 spin_unlock_irqrestore(&lp->lock, flags);
1471 DEB(DEB_STRUCT,i596_display_data(dev));
1472 i596_cleanup_cmd(dev,lp);
1473
1474 #ifdef ENABLE_MVME16x_NET
1475 if (MACH_IS_MVME16x) {
1476 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1477
1478 /* Disable all ints */
1479 pcc2[0x28] = 1;
1480 pcc2[0x2a] = 0x40;
1481 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1482 }
1483 #endif
1484 #ifdef ENABLE_BVME6000_NET
1485 if (MACH_IS_BVME6000) {
1486 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1487
1488 *ethirq = 1;
1489 }
1490 #endif
1491
1492 free_irq(dev->irq, dev);
1493 remove_rx_bufs(dev);
1494
1495 return 0;
1496 }
1497
1498 /*
1499 * Set or clear the multicast filter for this adaptor.
1500 */
1501
1502 static void set_multicast_list(struct net_device *dev)
1503 {
1504 struct i596_private *lp = dev->ml_priv;
1505 int config = 0, cnt;
1506
1507 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1508 dev->name, dev->mc_count,
1509 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1510 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1511
1512 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1513 return;
1514
1515 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1516 lp->cf_cmd.i596_config[8] |= 0x01;
1517 config = 1;
1518 }
1519 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1520 lp->cf_cmd.i596_config[8] &= ~0x01;
1521 config = 1;
1522 }
1523 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1524 lp->cf_cmd.i596_config[11] &= ~0x20;
1525 config = 1;
1526 }
1527 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1528 lp->cf_cmd.i596_config[11] |= 0x20;
1529 config = 1;
1530 }
1531 if (config) {
1532 lp->cf_cmd.cmd.command = CmdConfigure;
1533 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1534 }
1535
1536 cnt = dev->mc_count;
1537 if (cnt > MAX_MC_CNT)
1538 {
1539 cnt = MAX_MC_CNT;
1540 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1541 dev->name, cnt);
1542 }
1543
1544 if (dev->mc_count > 0) {
1545 struct dev_mc_list *dmi;
1546 unsigned char *cp;
1547 struct mc_cmd *cmd;
1548
1549 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1550 return;
1551 cmd = &lp->mc_cmd;
1552 cmd->cmd.command = CmdMulticastList;
1553 cmd->mc_cnt = dev->mc_count * 6;
1554 cp = cmd->mc_addrs;
1555 for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
1556 memcpy(cp, dmi->dmi_addr, 6);
1557 if (i596_debug > 1)
1558 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1559 dev->name, cp));
1560 }
1561 i596_add_cmd(dev, &cmd->cmd);
1562 }
1563 }
1564
1565 #ifdef MODULE
1566 static struct net_device *dev_82596;
1567
1568 #ifdef ENABLE_APRICOT
1569 module_param(irq, int, 0);
1570 MODULE_PARM_DESC(irq, "Apricot IRQ number");
1571 #endif
1572
1573 static int debug = -1;
1574 module_param(debug, int, 0);
1575 MODULE_PARM_DESC(debug, "i82596 debug mask");
1576
1577 int __init init_module(void)
1578 {
1579 if (debug >= 0)
1580 i596_debug = debug;
1581 dev_82596 = i82596_probe(-1);
1582 if (IS_ERR(dev_82596))
1583 return PTR_ERR(dev_82596);
1584 return 0;
1585 }
1586
1587 void __exit cleanup_module(void)
1588 {
1589 unregister_netdev(dev_82596);
1590 #ifdef __mc68000__
1591 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1592 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1593 */
1594
1595 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1596 IOMAP_FULL_CACHING);
1597 #endif
1598 free_page ((u32)(dev_82596->mem_start));
1599 #ifdef ENABLE_APRICOT
1600 /* If we don't do this, we can't re-insmod it later. */
1601 release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
1602 #endif
1603 free_netdev(dev_82596);
1604 }
1605
1606 #endif /* MODULE */
Support for the Chinese Samsung S3C2440 based development boards