1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * linux/drivers/acorn/net/ether3.c |
4 | * |
5 | * Copyright (C) 1995-2000 Russell King |
6 | * |
7 | * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card |
8 | * for Acorn machines |
9 | * |
10 | * By Russell King, with some suggestions from borris@ant.co.uk |
11 | * |
12 | * Changelog: |
13 | * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet |
14 | * address up to the higher levels - they're |
15 | * silently ignored. I/F can now be put into |
16 | * multicast mode. Receiver routine optimised. |
17 | * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of |
18 | * the kernel rather than when a module. |
19 | * 1.06 RMK 02/03/1996 Various code cleanups |
20 | * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit |
21 | * routines. |
22 | * 1.08 RMK 14/10/1996 Fixed problem with too many packets, |
23 | * prevented the kernel message about dropped |
24 | * packets appearing too many times a second. |
25 | * Now does not disable all IRQs, only the IRQ |
26 | * used by this card. |
27 | * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low, |
28 | * but we still service the TX queue if we get a |
29 | * RX interrupt. |
30 | * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004. |
31 | * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A. |
32 | * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1. |
33 | * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h. |
34 | * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets. |
35 | * Chip seems to have a bug in, whereby if the |
36 | * packet starts two bytes from the end of the |
37 | * buffer, it corrupts the receiver chain, and |
38 | * never updates the transmit status correctly. |
39 | * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing. |
40 | * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy |
41 | * hardware. |
42 | * 1.16 RMK 10/02/2000 Updated for 2.3.43 |
43 | * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8 |
44 | */ |
45 | |
46 | #include <linux/module.h> |
47 | #include <linux/kernel.h> |
48 | #include <linux/types.h> |
49 | #include <linux/fcntl.h> |
50 | #include <linux/interrupt.h> |
51 | #include <linux/ioport.h> |
52 | #include <linux/in.h> |
53 | #include <linux/slab.h> |
54 | #include <linux/string.h> |
55 | #include <linux/errno.h> |
56 | #include <linux/netdevice.h> |
57 | #include <linux/etherdevice.h> |
58 | #include <linux/skbuff.h> |
59 | #include <linux/device.h> |
60 | #include <linux/init.h> |
61 | #include <linux/delay.h> |
62 | #include <linux/bitops.h> |
63 | |
64 | #include <asm/ecard.h> |
65 | #include <asm/io.h> |
66 | |
67 | static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n" ; |
68 | |
69 | #include "ether3.h" |
70 | |
71 | static unsigned int net_debug = NET_DEBUG; |
72 | |
73 | static void ether3_setmulticastlist(struct net_device *dev); |
74 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt); |
75 | static void ether3_tx(struct net_device *dev); |
76 | static int ether3_open (struct net_device *dev); |
77 | static netdev_tx_t ether3_sendpacket(struct sk_buff *skb, |
78 | struct net_device *dev); |
79 | static irqreturn_t ether3_interrupt (int irq, void *dev_id); |
80 | static int ether3_close (struct net_device *dev); |
81 | static void ether3_setmulticastlist (struct net_device *dev); |
82 | static void ether3_timeout(struct net_device *dev, unsigned int txqueue); |
83 | |
84 | #define BUS_16 2 |
85 | #define BUS_8 1 |
86 | #define BUS_UNKNOWN 0 |
87 | |
88 | /* --------------------------------------------------------------------------- */ |
89 | |
90 | typedef enum { |
91 | buffer_write, |
92 | buffer_read |
93 | } buffer_rw_t; |
94 | |
95 | /* |
96 | * ether3 read/write. Slow things down a bit... |
97 | * The SEEQ8005 doesn't like us writing to its registers |
98 | * too quickly. |
99 | */ |
100 | static inline void ether3_outb(int v, void __iomem *r) |
101 | { |
102 | writeb(val: v, addr: r); |
103 | udelay(1); |
104 | } |
105 | |
106 | static inline void ether3_outw(int v, void __iomem *r) |
107 | { |
108 | writew(val: v, addr: r); |
109 | udelay(1); |
110 | } |
111 | #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) |
112 | #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) |
113 | |
114 | static int |
115 | ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) |
116 | { |
117 | int timeout = 1000; |
118 | |
119 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
120 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); |
121 | |
122 | while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { |
123 | if (!timeout--) { |
124 | printk("%s: setbuffer broken\n" , dev->name); |
125 | priv(dev)->broken = 1; |
126 | return 1; |
127 | } |
128 | udelay(1); |
129 | } |
130 | |
131 | if (read == buffer_read) { |
132 | ether3_outw(v: start, REG_DMAADDR); |
133 | ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); |
134 | } else { |
135 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); |
136 | ether3_outw(v: start, REG_DMAADDR); |
137 | } |
138 | return 0; |
139 | } |
140 | |
141 | /* |
142 | * write data to the buffer memory |
143 | */ |
144 | #define ether3_writebuffer(dev,data,length) \ |
145 | writesw(REG_BUFWIN, (data), (length) >> 1) |
146 | |
147 | #define ether3_writeword(dev,data) \ |
148 | writew((data), REG_BUFWIN) |
149 | |
150 | #define ether3_writelong(dev,data) { \ |
151 | void __iomem *reg_bufwin = REG_BUFWIN; \ |
152 | writew((data), reg_bufwin); \ |
153 | writew((data) >> 16, reg_bufwin); \ |
154 | } |
155 | |
156 | /* |
157 | * read data from the buffer memory |
158 | */ |
159 | #define ether3_readbuffer(dev,data,length) \ |
160 | readsw(REG_BUFWIN, (data), (length) >> 1) |
161 | |
162 | #define ether3_readword(dev) \ |
163 | readw(REG_BUFWIN) |
164 | |
165 | #define ether3_readlong(dev) \ |
166 | readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) |
167 | |
168 | /* |
169 | * Switch LED off... |
170 | */ |
171 | static void ether3_ledoff(struct timer_list *t) |
172 | { |
173 | struct dev_priv *private = from_timer(private, t, timer); |
174 | struct net_device *dev = private->dev; |
175 | |
176 | ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); |
177 | } |
178 | |
179 | /* |
180 | * switch LED on... |
181 | */ |
182 | static inline void ether3_ledon(struct net_device *dev) |
183 | { |
184 | del_timer(timer: &priv(dev)->timer); |
185 | priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ |
186 | add_timer(timer: &priv(dev)->timer); |
187 | if (priv(dev)->regs.config2 & CFG2_CTRLO) |
188 | ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); |
189 | } |
190 | |
191 | /* |
192 | * Read the ethernet address string from the on board rom. |
193 | * This is an ascii string!!! |
194 | */ |
195 | static int |
196 | ether3_addr(char *addr, struct expansion_card *ec) |
197 | { |
198 | struct in_chunk_dir cd; |
199 | char *s; |
200 | |
201 | if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { |
202 | int i; |
203 | for (i = 0; i<6; i++) { |
204 | addr[i] = simple_strtoul(s + 1, &s, 0x10); |
205 | if (*s != (i==5?')' : ':' )) |
206 | break; |
207 | } |
208 | if (i == 6) |
209 | return 0; |
210 | } |
211 | /* I wonder if we should even let the user continue in this case |
212 | * - no, it would be better to disable the device |
213 | */ |
214 | printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n" ); |
215 | return -ENODEV; |
216 | } |
217 | |
218 | /* --------------------------------------------------------------------------- */ |
219 | |
220 | static int |
221 | ether3_ramtest(struct net_device *dev, unsigned char byte) |
222 | { |
223 | unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); |
224 | int i,ret = 0; |
225 | int max_errors = 4; |
226 | int bad = -1; |
227 | |
228 | if (!buffer) |
229 | return 1; |
230 | |
231 | memset(buffer, byte, RX_END); |
232 | ether3_setbuffer(dev, read: buffer_write, start: 0); |
233 | ether3_writebuffer(dev, buffer, TX_END); |
234 | ether3_setbuffer(dev, read: buffer_write, RX_START); |
235 | ether3_writebuffer(dev, buffer + RX_START, RX_LEN); |
236 | memset(buffer, byte ^ 0xff, RX_END); |
237 | ether3_setbuffer(dev, read: buffer_read, start: 0); |
238 | ether3_readbuffer(dev, buffer, TX_END); |
239 | ether3_setbuffer(dev, read: buffer_read, RX_START); |
240 | ether3_readbuffer(dev, buffer + RX_START, RX_LEN); |
241 | |
242 | for (i = 0; i < RX_END; i++) { |
243 | if (buffer[i] != byte) { |
244 | if (max_errors > 0 && bad != buffer[i]) { |
245 | printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X" , |
246 | dev->name, buffer[i], byte, i); |
247 | ret = 2; |
248 | max_errors--; |
249 | bad = i; |
250 | } |
251 | } else { |
252 | if (bad != -1) { |
253 | if (bad != i - 1) |
254 | printk(" - 0x%04X\n" , i - 1); |
255 | printk("\n" ); |
256 | bad = -1; |
257 | } |
258 | } |
259 | } |
260 | if (bad != -1) |
261 | printk(" - 0xffff\n" ); |
262 | kfree(objp: buffer); |
263 | |
264 | return ret; |
265 | } |
266 | |
267 | /* ------------------------------------------------------------------------------- */ |
268 | |
269 | static int ether3_init_2(struct net_device *dev) |
270 | { |
271 | int i; |
272 | |
273 | priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; |
274 | priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; |
275 | priv(dev)->regs.command = 0; |
276 | |
277 | /* |
278 | * Set up our hardware address |
279 | */ |
280 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); |
281 | for (i = 0; i < 6; i++) |
282 | ether3_outb(v: dev->dev_addr[i], REG_BUFWIN); |
283 | |
284 | if (dev->flags & IFF_PROMISC) |
285 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; |
286 | else if (dev->flags & IFF_MULTICAST) |
287 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; |
288 | else |
289 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; |
290 | |
291 | /* |
292 | * There is a problem with the NQ8005 in that it occasionally loses the |
293 | * last two bytes. To get round this problem, we receive the CRC as |
294 | * well. That way, if we do lose the last two, then it doesn't matter. |
295 | */ |
296 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); |
297 | ether3_outw(v: (TX_END>>8) - 1, REG_BUFWIN); |
298 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); |
299 | ether3_outw(v: 0, REG_TRANSMITPTR); |
300 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); |
301 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
302 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
303 | ether3_outw(priv(dev)->regs.command, REG_COMMAND); |
304 | |
305 | i = ether3_ramtest(dev, byte: 0x5A); |
306 | if(i) |
307 | return i; |
308 | i = ether3_ramtest(dev, byte: 0x1E); |
309 | if(i) |
310 | return i; |
311 | |
312 | ether3_setbuffer(dev, read: buffer_write, start: 0); |
313 | ether3_writelong(dev, 0); |
314 | return 0; |
315 | } |
316 | |
317 | static void |
318 | ether3_init_for_open(struct net_device *dev) |
319 | { |
320 | int i; |
321 | |
322 | /* Reset the chip */ |
323 | ether3_outw(CFG2_RESET, REG_CONFIG2); |
324 | udelay(4); |
325 | |
326 | priv(dev)->regs.command = 0; |
327 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); |
328 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) |
329 | barrier(); |
330 | |
331 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); |
332 | for (i = 0; i < 6; i++) |
333 | ether3_outb(v: dev->dev_addr[i], REG_BUFWIN); |
334 | |
335 | priv(dev)->tx_head = 0; |
336 | priv(dev)->tx_tail = 0; |
337 | priv(dev)->regs.config2 |= CFG2_CTRLO; |
338 | priv(dev)->rx_head = RX_START; |
339 | |
340 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); |
341 | ether3_outw(v: (TX_END>>8) - 1, REG_BUFWIN); |
342 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); |
343 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); |
344 | ether3_outw(v: 0, REG_TRANSMITPTR); |
345 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
346 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
347 | |
348 | ether3_setbuffer(dev, read: buffer_write, start: 0); |
349 | ether3_writelong(dev, 0); |
350 | |
351 | priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; |
352 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); |
353 | } |
354 | |
355 | static inline int |
356 | ether3_probe_bus_8(struct net_device *dev, int val) |
357 | { |
358 | int write_low, write_high, read_low, read_high; |
359 | |
360 | write_low = val & 255; |
361 | write_high = val >> 8; |
362 | |
363 | printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]" , write_high, write_low); |
364 | |
365 | ether3_outb(v: write_low, REG_RECVPTR); |
366 | ether3_outb(v: write_high, REG_RECVPTR + 4); |
367 | |
368 | read_low = ether3_inb(REG_RECVPTR); |
369 | read_high = ether3_inb(REG_RECVPTR + 4); |
370 | |
371 | printk(", read8 [%02X:%02X]\n" , read_high, read_low); |
372 | |
373 | return read_low == write_low && read_high == write_high; |
374 | } |
375 | |
376 | static inline int |
377 | ether3_probe_bus_16(struct net_device *dev, int val) |
378 | { |
379 | int read_val; |
380 | |
381 | ether3_outw(v: val, REG_RECVPTR); |
382 | read_val = ether3_inw(REG_RECVPTR); |
383 | |
384 | printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n" , val, read_val); |
385 | |
386 | return read_val == val; |
387 | } |
388 | |
389 | /* |
390 | * Open/initialize the board. This is called (in the current kernel) |
391 | * sometime after booting when the 'ifconfig' program is run. |
392 | * |
393 | * This routine should set everything up anew at each open, even |
394 | * registers that "should" only need to be set once at boot, so that |
395 | * there is non-reboot way to recover if something goes wrong. |
396 | */ |
397 | static int |
398 | ether3_open(struct net_device *dev) |
399 | { |
400 | if (request_irq(irq: dev->irq, handler: ether3_interrupt, flags: 0, name: "ether3" , dev)) |
401 | return -EAGAIN; |
402 | |
403 | ether3_init_for_open(dev); |
404 | |
405 | netif_start_queue(dev); |
406 | |
407 | return 0; |
408 | } |
409 | |
410 | /* |
411 | * The inverse routine to ether3_open(). |
412 | */ |
413 | static int |
414 | ether3_close(struct net_device *dev) |
415 | { |
416 | netif_stop_queue(dev); |
417 | |
418 | disable_irq(irq: dev->irq); |
419 | |
420 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); |
421 | priv(dev)->regs.command = 0; |
422 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) |
423 | barrier(); |
424 | ether3_outb(v: 0x80, REG_CONFIG2 + 4); |
425 | ether3_outw(v: 0, REG_COMMAND); |
426 | |
427 | free_irq(dev->irq, dev); |
428 | |
429 | return 0; |
430 | } |
431 | |
432 | /* |
433 | * Set or clear promiscuous/multicast mode filter for this adaptor. |
434 | * |
435 | * We don't attempt any packet filtering. The card may have a SEEQ 8004 |
436 | * in which does not have the other ethernet address registers present... |
437 | */ |
438 | static void ether3_setmulticastlist(struct net_device *dev) |
439 | { |
440 | priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; |
441 | |
442 | if (dev->flags & IFF_PROMISC) { |
443 | /* promiscuous mode */ |
444 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; |
445 | } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) { |
446 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; |
447 | } else |
448 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; |
449 | |
450 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
451 | } |
452 | |
453 | static void ether3_timeout(struct net_device *dev, unsigned int txqueue) |
454 | { |
455 | unsigned long flags; |
456 | |
457 | del_timer(timer: &priv(dev)->timer); |
458 | |
459 | local_irq_save(flags); |
460 | printk(KERN_ERR "%s: transmit timed out, network cable problem?\n" , dev->name); |
461 | printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n" , dev->name, |
462 | ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); |
463 | printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n" , dev->name, |
464 | ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); |
465 | printk(KERN_ERR "%s: tx head=%X tx tail=%X\n" , dev->name, |
466 | priv(dev)->tx_head, priv(dev)->tx_tail); |
467 | ether3_setbuffer(dev, read: buffer_read, priv(dev)->tx_tail); |
468 | printk(KERN_ERR "%s: packet status = %08X\n" , dev->name, ether3_readlong(dev)); |
469 | local_irq_restore(flags); |
470 | |
471 | priv(dev)->regs.config2 |= CFG2_CTRLO; |
472 | dev->stats.tx_errors += 1; |
473 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
474 | priv(dev)->tx_head = priv(dev)->tx_tail = 0; |
475 | |
476 | netif_wake_queue(dev); |
477 | } |
478 | |
479 | /* |
480 | * Transmit a packet |
481 | */ |
482 | static netdev_tx_t |
483 | ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) |
484 | { |
485 | unsigned long flags; |
486 | unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; |
487 | unsigned int ptr, next_ptr; |
488 | |
489 | if (priv(dev)->broken) { |
490 | dev_kfree_skb(skb); |
491 | dev->stats.tx_dropped++; |
492 | netif_start_queue(dev); |
493 | return NETDEV_TX_OK; |
494 | } |
495 | |
496 | length = (length + 1) & ~1; |
497 | if (length != skb->len) { |
498 | if (skb_padto(skb, len: length)) |
499 | goto out; |
500 | } |
501 | |
502 | next_ptr = (priv(dev)->tx_head + 1) & 15; |
503 | |
504 | local_irq_save(flags); |
505 | |
506 | if (priv(dev)->tx_tail == next_ptr) { |
507 | local_irq_restore(flags); |
508 | return NETDEV_TX_BUSY; /* unable to queue */ |
509 | } |
510 | |
511 | ptr = 0x600 * priv(dev)->tx_head; |
512 | priv(dev)->tx_head = next_ptr; |
513 | next_ptr *= 0x600; |
514 | |
515 | #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) |
516 | |
517 | ether3_setbuffer(dev, read: buffer_write, start: next_ptr); |
518 | ether3_writelong(dev, 0); |
519 | ether3_setbuffer(dev, read: buffer_write, start: ptr); |
520 | ether3_writelong(dev, 0); |
521 | ether3_writebuffer(dev, skb->data, length); |
522 | ether3_writeword(dev, htons(next_ptr)); |
523 | ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); |
524 | ether3_setbuffer(dev, read: buffer_write, start: ptr); |
525 | ether3_writeword(dev, htons((ptr + length + 4))); |
526 | ether3_writeword(dev, TXHDR_FLAGS >> 16); |
527 | ether3_ledon(dev); |
528 | |
529 | if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { |
530 | ether3_outw(v: ptr, REG_TRANSMITPTR); |
531 | ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); |
532 | } |
533 | |
534 | next_ptr = (priv(dev)->tx_head + 1) & 15; |
535 | local_irq_restore(flags); |
536 | |
537 | dev_kfree_skb(skb); |
538 | |
539 | if (priv(dev)->tx_tail == next_ptr) |
540 | netif_stop_queue(dev); |
541 | |
542 | out: |
543 | return NETDEV_TX_OK; |
544 | } |
545 | |
546 | static irqreturn_t |
547 | ether3_interrupt(int irq, void *dev_id) |
548 | { |
549 | struct net_device *dev = (struct net_device *)dev_id; |
550 | unsigned int status, handled = IRQ_NONE; |
551 | |
552 | #if NET_DEBUG > 1 |
553 | if(net_debug & DEBUG_INT) |
554 | printk("eth3irq: %d " , irq); |
555 | #endif |
556 | |
557 | status = ether3_inw(REG_STATUS); |
558 | |
559 | if (status & STAT_INTRX) { |
560 | ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); |
561 | ether3_rx(dev, maxcnt: 12); |
562 | handled = IRQ_HANDLED; |
563 | } |
564 | |
565 | if (status & STAT_INTTX) { |
566 | ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); |
567 | ether3_tx(dev); |
568 | handled = IRQ_HANDLED; |
569 | } |
570 | |
571 | #if NET_DEBUG > 1 |
572 | if(net_debug & DEBUG_INT) |
573 | printk("done\n" ); |
574 | #endif |
575 | return handled; |
576 | } |
577 | |
578 | /* |
579 | * If we have a good packet(s), get it/them out of the buffers. |
580 | */ |
581 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt) |
582 | { |
583 | unsigned int next_ptr = priv(dev)->rx_head, received = 0; |
584 | |
585 | ether3_ledon(dev); |
586 | |
587 | do { |
588 | unsigned int this_ptr, status; |
589 | unsigned char addrs[16]; |
590 | |
591 | /* |
592 | * read the first 16 bytes from the buffer. |
593 | * This contains the status bytes etc and ethernet addresses, |
594 | * and we also check the source ethernet address to see if |
595 | * it originated from us. |
596 | */ |
597 | { |
598 | unsigned int temp_ptr; |
599 | ether3_setbuffer(dev, read: buffer_read, start: next_ptr); |
600 | temp_ptr = ether3_readword(dev); |
601 | status = ether3_readword(dev); |
602 | if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != |
603 | (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) |
604 | break; |
605 | |
606 | this_ptr = next_ptr + 4; |
607 | next_ptr = ntohs(temp_ptr); |
608 | } |
609 | ether3_setbuffer(dev, read: buffer_read, start: this_ptr); |
610 | ether3_readbuffer(dev, addrs+2, 12); |
611 | |
612 | if (next_ptr < RX_START || next_ptr >= RX_END) { |
613 | printk("%s: bad next pointer @%04X: " , dev->name, priv(dev)->rx_head); |
614 | printk("%02X %02X %02X %02X " , next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); |
615 | printk("%pM %pM\n" , addrs + 2, addrs + 8); |
616 | next_ptr = priv(dev)->rx_head; |
617 | break; |
618 | } |
619 | /* |
620 | * ignore our own packets... |
621 | */ |
622 | if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && |
623 | !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { |
624 | maxcnt ++; /* compensate for loopedback packet */ |
625 | ether3_outw(v: next_ptr >> 8, REG_RECVEND); |
626 | } else |
627 | if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { |
628 | unsigned int length = next_ptr - this_ptr; |
629 | struct sk_buff *skb; |
630 | |
631 | if (next_ptr <= this_ptr) |
632 | length += RX_END - RX_START; |
633 | |
634 | skb = netdev_alloc_skb(dev, length: length + 2); |
635 | if (skb) { |
636 | unsigned char *buf; |
637 | |
638 | skb_reserve(skb, len: 2); |
639 | buf = skb_put(skb, len: length); |
640 | ether3_readbuffer(dev, buf + 12, length - 12); |
641 | ether3_outw(v: next_ptr >> 8, REG_RECVEND); |
642 | *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); |
643 | *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); |
644 | *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); |
645 | *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); |
646 | skb->protocol = eth_type_trans(skb, dev); |
647 | netif_rx(skb); |
648 | received ++; |
649 | } else { |
650 | ether3_outw(v: next_ptr >> 8, REG_RECVEND); |
651 | dev->stats.rx_dropped++; |
652 | goto done; |
653 | } |
654 | } else { |
655 | struct net_device_stats *stats = &dev->stats; |
656 | ether3_outw(v: next_ptr >> 8, REG_RECVEND); |
657 | if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; |
658 | if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; |
659 | if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; |
660 | if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; |
661 | stats->rx_errors++; |
662 | } |
663 | } |
664 | while (-- maxcnt); |
665 | |
666 | done: |
667 | dev->stats.rx_packets += received; |
668 | priv(dev)->rx_head = next_ptr; |
669 | /* |
670 | * If rx went off line, then that means that the buffer may be full. We |
671 | * have dropped at least one packet. |
672 | */ |
673 | if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { |
674 | dev->stats.rx_dropped++; |
675 | ether3_outw(v: next_ptr, REG_RECVPTR); |
676 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); |
677 | } |
678 | |
679 | return maxcnt; |
680 | } |
681 | |
682 | /* |
683 | * Update stats for the transmitted packet(s) |
684 | */ |
685 | static void ether3_tx(struct net_device *dev) |
686 | { |
687 | unsigned int tx_tail = priv(dev)->tx_tail; |
688 | int max_work = 14; |
689 | |
690 | do { |
691 | unsigned long status; |
692 | |
693 | /* |
694 | * Read the packet header |
695 | */ |
696 | ether3_setbuffer(dev, read: buffer_read, start: tx_tail * 0x600); |
697 | status = ether3_readlong(dev); |
698 | |
699 | /* |
700 | * Check to see if this packet has been transmitted |
701 | */ |
702 | if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != |
703 | (TXSTAT_DONE | TXHDR_TRANSMIT)) |
704 | break; |
705 | |
706 | /* |
707 | * Update errors |
708 | */ |
709 | if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) |
710 | dev->stats.tx_packets++; |
711 | else { |
712 | dev->stats.tx_errors++; |
713 | if (status & TXSTAT_16COLLISIONS) |
714 | dev->stats.collisions += 16; |
715 | if (status & TXSTAT_BABBLED) |
716 | dev->stats.tx_fifo_errors++; |
717 | } |
718 | |
719 | tx_tail = (tx_tail + 1) & 15; |
720 | } while (--max_work); |
721 | |
722 | if (priv(dev)->tx_tail != tx_tail) { |
723 | priv(dev)->tx_tail = tx_tail; |
724 | netif_wake_queue(dev); |
725 | } |
726 | } |
727 | |
728 | static void ether3_banner(void) |
729 | { |
730 | static unsigned version_printed = 0; |
731 | |
732 | if (net_debug && version_printed++ == 0) |
733 | printk(KERN_INFO "%s" , version); |
734 | } |
735 | |
736 | static const struct net_device_ops ether3_netdev_ops = { |
737 | .ndo_open = ether3_open, |
738 | .ndo_stop = ether3_close, |
739 | .ndo_start_xmit = ether3_sendpacket, |
740 | .ndo_set_rx_mode = ether3_setmulticastlist, |
741 | .ndo_tx_timeout = ether3_timeout, |
742 | .ndo_validate_addr = eth_validate_addr, |
743 | .ndo_set_mac_address = eth_mac_addr, |
744 | }; |
745 | |
746 | static int |
747 | ether3_probe(struct expansion_card *ec, const struct ecard_id *id) |
748 | { |
749 | const struct ether3_data *data = id->data; |
750 | struct net_device *dev; |
751 | int bus_type, ret; |
752 | u8 addr[ETH_ALEN]; |
753 | |
754 | ether3_banner(); |
755 | |
756 | ret = ecard_request_resources(ec); |
757 | if (ret) |
758 | goto out; |
759 | |
760 | dev = alloc_etherdev(sizeof(struct dev_priv)); |
761 | if (!dev) { |
762 | ret = -ENOMEM; |
763 | goto release; |
764 | } |
765 | |
766 | SET_NETDEV_DEV(dev, &ec->dev); |
767 | |
768 | priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); |
769 | if (!priv(dev)->base) { |
770 | ret = -ENOMEM; |
771 | goto free; |
772 | } |
773 | |
774 | ec->irqaddr = priv(dev)->base + data->base_offset; |
775 | ec->irqmask = 0xf0; |
776 | |
777 | priv(dev)->seeq = priv(dev)->base + data->base_offset; |
778 | dev->irq = ec->irq; |
779 | |
780 | ether3_addr(addr, ec); |
781 | eth_hw_addr_set(dev, addr); |
782 | |
783 | priv(dev)->dev = dev; |
784 | timer_setup(&priv(dev)->timer, ether3_ledoff, 0); |
785 | |
786 | /* Reset card... |
787 | */ |
788 | ether3_outb(v: 0x80, REG_CONFIG2 + 4); |
789 | bus_type = BUS_UNKNOWN; |
790 | udelay(4); |
791 | |
792 | /* Test using Receive Pointer (16-bit register) to find out |
793 | * how the ether3 is connected to the bus... |
794 | */ |
795 | if (ether3_probe_bus_8(dev, val: 0x100) && |
796 | ether3_probe_bus_8(dev, val: 0x201)) |
797 | bus_type = BUS_8; |
798 | |
799 | if (bus_type == BUS_UNKNOWN && |
800 | ether3_probe_bus_16(dev, val: 0x101) && |
801 | ether3_probe_bus_16(dev, val: 0x201)) |
802 | bus_type = BUS_16; |
803 | |
804 | switch (bus_type) { |
805 | case BUS_UNKNOWN: |
806 | printk(KERN_ERR "%s: unable to identify bus width\n" , dev->name); |
807 | ret = -ENODEV; |
808 | goto free; |
809 | |
810 | case BUS_8: |
811 | printk(KERN_ERR "%s: %s found, but is an unsupported " |
812 | "8-bit card\n" , dev->name, data->name); |
813 | ret = -ENODEV; |
814 | goto free; |
815 | |
816 | default: |
817 | break; |
818 | } |
819 | |
820 | if (ether3_init_2(dev)) { |
821 | ret = -ENODEV; |
822 | goto free; |
823 | } |
824 | |
825 | dev->netdev_ops = ðer3_netdev_ops; |
826 | dev->watchdog_timeo = 5 * HZ / 100; |
827 | |
828 | ret = register_netdev(dev); |
829 | if (ret) |
830 | goto free; |
831 | |
832 | printk("%s: %s in slot %d, %pM\n" , |
833 | dev->name, data->name, ec->slot_no, dev->dev_addr); |
834 | |
835 | ecard_set_drvdata(ec, dev); |
836 | return 0; |
837 | |
838 | free: |
839 | free_netdev(dev); |
840 | release: |
841 | ecard_release_resources(ec); |
842 | out: |
843 | return ret; |
844 | } |
845 | |
846 | static void ether3_remove(struct expansion_card *ec) |
847 | { |
848 | struct net_device *dev = ecard_get_drvdata(ec); |
849 | |
850 | ecard_set_drvdata(ec, NULL); |
851 | |
852 | unregister_netdev(dev); |
853 | free_netdev(dev); |
854 | ecard_release_resources(ec); |
855 | } |
856 | |
857 | static struct ether3_data ether3 = { |
858 | .name = "ether3" , |
859 | .base_offset = 0, |
860 | }; |
861 | |
862 | static struct ether3_data etherb = { |
863 | .name = "etherb" , |
864 | .base_offset = 0x800, |
865 | }; |
866 | |
867 | static const struct ecard_id ether3_ids[] = { |
868 | { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, |
869 | { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, |
870 | { MANU_ANT, PROD_ANT_ETHERB, ðerb }, |
871 | { 0xffff, 0xffff } |
872 | }; |
873 | |
874 | static struct ecard_driver ether3_driver = { |
875 | .probe = ether3_probe, |
876 | .remove = ether3_remove, |
877 | .id_table = ether3_ids, |
878 | .drv = { |
879 | .name = "ether3" , |
880 | }, |
881 | }; |
882 | |
883 | static int __init ether3_init(void) |
884 | { |
885 | return ecard_register_driver(ðer3_driver); |
886 | } |
887 | |
888 | static void __exit ether3_exit(void) |
889 | { |
890 | ecard_remove_driver(ðer3_driver); |
891 | } |
892 | |
893 | module_init(ether3_init); |
894 | module_exit(ether3_exit); |
895 | |
896 | MODULE_LICENSE("GPL" ); |
897 | |