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1da177e4 LT |
1 | /* |
2 | * linux/drivers/acorn/net/ether3.c | |
3 | * | |
4 | * Copyright (C) 1995-2000 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card | |
11 | * for Acorn machines | |
12 | * | |
13 | * By Russell King, with some suggestions from borris@ant.co.uk | |
14 | * | |
15 | * Changelog: | |
16 | * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet | |
17 | * address up to the higher levels - they're | |
18 | * silently ignored. I/F can now be put into | |
19 | * multicast mode. Receiver routine optimised. | |
20 | * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of | |
21 | * the kernel rather than when a module. | |
22 | * 1.06 RMK 02/03/1996 Various code cleanups | |
23 | * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit | |
24 | * routines. | |
25 | * 1.08 RMK 14/10/1996 Fixed problem with too many packets, | |
26 | * prevented the kernel message about dropped | |
27 | * packets appearing too many times a second. | |
28 | * Now does not disable all IRQs, only the IRQ | |
29 | * used by this card. | |
30 | * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low, | |
31 | * but we still service the TX queue if we get a | |
32 | * RX interrupt. | |
33 | * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004. | |
34 | * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A. | |
35 | * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1. | |
36 | * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h. | |
37 | * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets. | |
38 | * Chip seems to have a bug in, whereby if the | |
39 | * packet starts two bytes from the end of the | |
40 | * buffer, it corrupts the receiver chain, and | |
41 | * never updates the transmit status correctly. | |
42 | * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing. | |
43 | * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy | |
44 | * hardware. | |
45 | * 1.16 RMK 10/02/2000 Updated for 2.3.43 | |
46 | * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8 | |
47 | */ | |
48 | ||
49 | #include <linux/module.h> | |
50 | #include <linux/kernel.h> | |
51 | #include <linux/sched.h> | |
52 | #include <linux/types.h> | |
53 | #include <linux/fcntl.h> | |
54 | #include <linux/interrupt.h> | |
55 | #include <linux/ptrace.h> | |
56 | #include <linux/ioport.h> | |
57 | #include <linux/in.h> | |
58 | #include <linux/slab.h> | |
59 | #include <linux/string.h> | |
60 | #include <linux/errno.h> | |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/etherdevice.h> | |
63 | #include <linux/skbuff.h> | |
64 | #include <linux/device.h> | |
65 | #include <linux/init.h> | |
66 | #include <linux/delay.h> | |
67 | #include <linux/bitops.h> | |
68 | ||
69 | #include <asm/system.h> | |
70 | #include <asm/ecard.h> | |
71 | #include <asm/io.h> | |
1da177e4 LT |
72 | |
73 | static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; | |
74 | ||
75 | #include "ether3.h" | |
76 | ||
77 | static unsigned int net_debug = NET_DEBUG; | |
78 | ||
79 | static void ether3_setmulticastlist(struct net_device *dev); | |
80 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt); | |
81 | static void ether3_tx(struct net_device *dev); | |
82 | static int ether3_open (struct net_device *dev); | |
83 | static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev); | |
84 | static irqreturn_t ether3_interrupt (int irq, void *dev_id, struct pt_regs *regs); | |
85 | static int ether3_close (struct net_device *dev); | |
86 | static struct net_device_stats *ether3_getstats (struct net_device *dev); | |
87 | static void ether3_setmulticastlist (struct net_device *dev); | |
88 | static void ether3_timeout(struct net_device *dev); | |
89 | ||
90 | #define BUS_16 2 | |
91 | #define BUS_8 1 | |
92 | #define BUS_UNKNOWN 0 | |
93 | ||
94 | /* --------------------------------------------------------------------------- */ | |
95 | ||
96 | typedef enum { | |
97 | buffer_write, | |
98 | buffer_read | |
99 | } buffer_rw_t; | |
100 | ||
101 | /* | |
102 | * ether3 read/write. Slow things down a bit... | |
103 | * The SEEQ8005 doesn't like us writing to its registers | |
104 | * too quickly. | |
105 | */ | |
106 | static inline void ether3_outb(int v, const void __iomem *r) | |
107 | { | |
108 | writeb(v, r); | |
109 | udelay(1); | |
110 | } | |
111 | ||
112 | static inline void ether3_outw(int v, const void __iomem *r) | |
113 | { | |
114 | writew(v, r); | |
115 | udelay(1); | |
116 | } | |
117 | #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) | |
118 | #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) | |
119 | ||
120 | static int | |
121 | ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) | |
122 | { | |
123 | int timeout = 1000; | |
124 | ||
125 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
126 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); | |
127 | ||
128 | while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { | |
129 | if (!timeout--) { | |
130 | printk("%s: setbuffer broken\n", dev->name); | |
131 | priv(dev)->broken = 1; | |
132 | return 1; | |
133 | } | |
134 | udelay(1); | |
135 | } | |
136 | ||
137 | if (read == buffer_read) { | |
138 | ether3_outw(start, REG_DMAADDR); | |
139 | ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); | |
140 | } else { | |
141 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); | |
142 | ether3_outw(start, REG_DMAADDR); | |
143 | } | |
144 | return 0; | |
145 | } | |
146 | ||
147 | /* | |
148 | * write data to the buffer memory | |
149 | */ | |
150 | #define ether3_writebuffer(dev,data,length) \ | |
151 | writesw(REG_BUFWIN, (data), (length) >> 1) | |
152 | ||
153 | #define ether3_writeword(dev,data) \ | |
154 | writew((data), REG_BUFWIN) | |
155 | ||
156 | #define ether3_writelong(dev,data) { \ | |
157 | void __iomem *reg_bufwin = REG_BUFWIN; \ | |
158 | writew((data), reg_bufwin); \ | |
159 | writew((data) >> 16, reg_bufwin); \ | |
160 | } | |
161 | ||
162 | /* | |
163 | * read data from the buffer memory | |
164 | */ | |
165 | #define ether3_readbuffer(dev,data,length) \ | |
166 | readsw(REG_BUFWIN, (data), (length) >> 1) | |
167 | ||
168 | #define ether3_readword(dev) \ | |
169 | readw(REG_BUFWIN) | |
170 | ||
171 | #define ether3_readlong(dev) \ | |
172 | readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) | |
173 | ||
174 | /* | |
175 | * Switch LED off... | |
176 | */ | |
177 | static void ether3_ledoff(unsigned long data) | |
178 | { | |
179 | struct net_device *dev = (struct net_device *)data; | |
180 | ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); | |
181 | } | |
182 | ||
183 | /* | |
184 | * switch LED on... | |
185 | */ | |
186 | static inline void ether3_ledon(struct net_device *dev) | |
187 | { | |
188 | del_timer(&priv(dev)->timer); | |
189 | priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ | |
190 | priv(dev)->timer.data = (unsigned long)dev; | |
191 | priv(dev)->timer.function = ether3_ledoff; | |
192 | add_timer(&priv(dev)->timer); | |
193 | if (priv(dev)->regs.config2 & CFG2_CTRLO) | |
194 | ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); | |
195 | } | |
196 | ||
197 | /* | |
198 | * Read the ethernet address string from the on board rom. | |
199 | * This is an ascii string!!! | |
200 | */ | |
201 | static int __init | |
202 | ether3_addr(char *addr, struct expansion_card *ec) | |
203 | { | |
204 | struct in_chunk_dir cd; | |
205 | char *s; | |
206 | ||
207 | if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { | |
208 | int i; | |
209 | for (i = 0; i<6; i++) { | |
210 | addr[i] = simple_strtoul(s + 1, &s, 0x10); | |
211 | if (*s != (i==5?')' : ':' )) | |
212 | break; | |
213 | } | |
214 | if (i == 6) | |
215 | return 0; | |
216 | } | |
217 | /* I wonder if we should even let the user continue in this case | |
218 | * - no, it would be better to disable the device | |
219 | */ | |
220 | printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); | |
221 | return -ENODEV; | |
222 | } | |
223 | ||
224 | /* --------------------------------------------------------------------------- */ | |
225 | ||
226 | static int __init | |
227 | ether3_ramtest(struct net_device *dev, unsigned char byte) | |
228 | { | |
229 | unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); | |
230 | int i,ret = 0; | |
231 | int max_errors = 4; | |
232 | int bad = -1; | |
233 | ||
234 | if (!buffer) | |
235 | return 1; | |
236 | ||
237 | memset(buffer, byte, RX_END); | |
238 | ether3_setbuffer(dev, buffer_write, 0); | |
239 | ether3_writebuffer(dev, buffer, TX_END); | |
240 | ether3_setbuffer(dev, buffer_write, RX_START); | |
241 | ether3_writebuffer(dev, buffer + RX_START, RX_LEN); | |
242 | memset(buffer, byte ^ 0xff, RX_END); | |
243 | ether3_setbuffer(dev, buffer_read, 0); | |
244 | ether3_readbuffer(dev, buffer, TX_END); | |
245 | ether3_setbuffer(dev, buffer_read, RX_START); | |
246 | ether3_readbuffer(dev, buffer + RX_START, RX_LEN); | |
247 | ||
248 | for (i = 0; i < RX_END; i++) { | |
249 | if (buffer[i] != byte) { | |
250 | if (max_errors > 0 && bad != buffer[i]) { | |
251 | printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", | |
252 | dev->name, buffer[i], byte, i); | |
253 | ret = 2; | |
254 | max_errors--; | |
255 | bad = i; | |
256 | } | |
257 | } else { | |
258 | if (bad != -1) { | |
259 | if (bad != i - 1) | |
260 | printk(" - 0x%04X\n", i - 1); | |
261 | printk("\n"); | |
262 | bad = -1; | |
263 | } | |
264 | } | |
265 | } | |
266 | if (bad != -1) | |
267 | printk(" - 0xffff\n"); | |
268 | kfree(buffer); | |
269 | ||
270 | return ret; | |
271 | } | |
272 | ||
273 | /* ------------------------------------------------------------------------------- */ | |
274 | ||
275 | static int __init ether3_init_2(struct net_device *dev) | |
276 | { | |
277 | int i; | |
278 | ||
279 | priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; | |
280 | priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; | |
281 | priv(dev)->regs.command = 0; | |
282 | ||
283 | /* | |
284 | * Set up our hardware address | |
285 | */ | |
286 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); | |
287 | for (i = 0; i < 6; i++) | |
288 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); | |
289 | ||
290 | if (dev->flags & IFF_PROMISC) | |
291 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; | |
292 | else if (dev->flags & IFF_MULTICAST) | |
293 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; | |
294 | else | |
295 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; | |
296 | ||
297 | /* | |
298 | * There is a problem with the NQ8005 in that it occasionally loses the | |
299 | * last two bytes. To get round this problem, we receive the CRC as | |
300 | * well. That way, if we do lose the last two, then it doesn't matter. | |
301 | */ | |
302 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); | |
303 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); | |
304 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); | |
305 | ether3_outw(0, REG_TRANSMITPTR); | |
306 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); | |
307 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
308 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
309 | ether3_outw(priv(dev)->regs.command, REG_COMMAND); | |
310 | ||
311 | i = ether3_ramtest(dev, 0x5A); | |
312 | if(i) | |
313 | return i; | |
314 | i = ether3_ramtest(dev, 0x1E); | |
315 | if(i) | |
316 | return i; | |
317 | ||
318 | ether3_setbuffer(dev, buffer_write, 0); | |
319 | ether3_writelong(dev, 0); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static void | |
324 | ether3_init_for_open(struct net_device *dev) | |
325 | { | |
326 | int i; | |
327 | ||
328 | memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats)); | |
329 | ||
330 | /* Reset the chip */ | |
331 | ether3_outw(CFG2_RESET, REG_CONFIG2); | |
332 | udelay(4); | |
333 | ||
334 | priv(dev)->regs.command = 0; | |
335 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); | |
336 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) | |
337 | barrier(); | |
338 | ||
339 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); | |
340 | for (i = 0; i < 6; i++) | |
341 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); | |
342 | ||
343 | priv(dev)->tx_head = 0; | |
344 | priv(dev)->tx_tail = 0; | |
345 | priv(dev)->regs.config2 |= CFG2_CTRLO; | |
346 | priv(dev)->rx_head = RX_START; | |
347 | ||
348 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); | |
349 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); | |
350 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); | |
351 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); | |
352 | ether3_outw(0, REG_TRANSMITPTR); | |
353 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
354 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
355 | ||
356 | ether3_setbuffer(dev, buffer_write, 0); | |
357 | ether3_writelong(dev, 0); | |
358 | ||
359 | priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; | |
360 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); | |
361 | } | |
362 | ||
363 | static inline int | |
364 | ether3_probe_bus_8(struct net_device *dev, int val) | |
365 | { | |
366 | int write_low, write_high, read_low, read_high; | |
367 | ||
368 | write_low = val & 255; | |
369 | write_high = val >> 8; | |
370 | ||
371 | printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); | |
372 | ||
373 | ether3_outb(write_low, REG_RECVPTR); | |
374 | ether3_outb(write_high, REG_RECVPTR + 4); | |
375 | ||
376 | read_low = ether3_inb(REG_RECVPTR); | |
377 | read_high = ether3_inb(REG_RECVPTR + 4); | |
378 | ||
379 | printk(", read8 [%02X:%02X]\n", read_high, read_low); | |
380 | ||
381 | return read_low == write_low && read_high == write_high; | |
382 | } | |
383 | ||
384 | static inline int | |
385 | ether3_probe_bus_16(struct net_device *dev, int val) | |
386 | { | |
387 | int read_val; | |
388 | ||
389 | ether3_outw(val, REG_RECVPTR); | |
390 | read_val = ether3_inw(REG_RECVPTR); | |
391 | ||
392 | printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); | |
393 | ||
394 | return read_val == val; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Open/initialize the board. This is called (in the current kernel) | |
399 | * sometime after booting when the 'ifconfig' program is run. | |
400 | * | |
401 | * This routine should set everything up anew at each open, even | |
402 | * registers that "should" only need to be set once at boot, so that | |
403 | * there is non-reboot way to recover if something goes wrong. | |
404 | */ | |
405 | static int | |
406 | ether3_open(struct net_device *dev) | |
407 | { | |
408 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
409 | printk(KERN_WARNING "%s: invalid ethernet MAC address\n", | |
410 | dev->name); | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) | |
415 | return -EAGAIN; | |
416 | ||
417 | ether3_init_for_open(dev); | |
418 | ||
419 | netif_start_queue(dev); | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | /* | |
425 | * The inverse routine to ether3_open(). | |
426 | */ | |
427 | static int | |
428 | ether3_close(struct net_device *dev) | |
429 | { | |
430 | netif_stop_queue(dev); | |
431 | ||
432 | disable_irq(dev->irq); | |
433 | ||
434 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); | |
435 | priv(dev)->regs.command = 0; | |
436 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) | |
437 | barrier(); | |
438 | ether3_outb(0x80, REG_CONFIG2 + 4); | |
439 | ether3_outw(0, REG_COMMAND); | |
440 | ||
441 | free_irq(dev->irq, dev); | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Get the current statistics. This may be called with the card open or | |
448 | * closed. | |
449 | */ | |
450 | static struct net_device_stats *ether3_getstats(struct net_device *dev) | |
451 | { | |
452 | return &priv(dev)->stats; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Set or clear promiscuous/multicast mode filter for this adaptor. | |
457 | * | |
458 | * We don't attempt any packet filtering. The card may have a SEEQ 8004 | |
459 | * in which does not have the other ethernet address registers present... | |
460 | */ | |
461 | static void ether3_setmulticastlist(struct net_device *dev) | |
462 | { | |
463 | priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; | |
464 | ||
465 | if (dev->flags & IFF_PROMISC) { | |
466 | /* promiscuous mode */ | |
467 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; | |
468 | } else if (dev->flags & IFF_ALLMULTI) { | |
469 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; | |
470 | } else | |
471 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; | |
472 | ||
473 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
474 | } | |
475 | ||
476 | static void ether3_timeout(struct net_device *dev) | |
477 | { | |
478 | unsigned long flags; | |
479 | ||
480 | del_timer(&priv(dev)->timer); | |
481 | ||
482 | local_irq_save(flags); | |
483 | printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); | |
484 | printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, | |
485 | ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); | |
486 | printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, | |
487 | ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); | |
488 | printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, | |
489 | priv(dev)->tx_head, priv(dev)->tx_tail); | |
490 | ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); | |
491 | printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); | |
492 | local_irq_restore(flags); | |
493 | ||
494 | priv(dev)->regs.config2 |= CFG2_CTRLO; | |
495 | priv(dev)->stats.tx_errors += 1; | |
496 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
497 | priv(dev)->tx_head = priv(dev)->tx_tail = 0; | |
498 | ||
499 | netif_wake_queue(dev); | |
500 | } | |
501 | ||
502 | /* | |
503 | * Transmit a packet | |
504 | */ | |
505 | static int | |
506 | ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) | |
507 | { | |
508 | unsigned long flags; | |
509 | unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
510 | unsigned int ptr, next_ptr; | |
511 | ||
512 | if (priv(dev)->broken) { | |
513 | dev_kfree_skb(skb); | |
514 | priv(dev)->stats.tx_dropped ++; | |
515 | netif_start_queue(dev); | |
516 | return 0; | |
517 | } | |
518 | ||
519 | length = (length + 1) & ~1; | |
520 | if (length != skb->len) { | |
5b057c6b | 521 | if (skb_padto(skb, length)) |
1da177e4 LT |
522 | goto out; |
523 | } | |
524 | ||
525 | next_ptr = (priv(dev)->tx_head + 1) & 15; | |
526 | ||
527 | local_irq_save(flags); | |
528 | ||
529 | if (priv(dev)->tx_tail == next_ptr) { | |
530 | local_irq_restore(flags); | |
531 | return 1; /* unable to queue */ | |
532 | } | |
533 | ||
534 | dev->trans_start = jiffies; | |
535 | ptr = 0x600 * priv(dev)->tx_head; | |
536 | priv(dev)->tx_head = next_ptr; | |
537 | next_ptr *= 0x600; | |
538 | ||
539 | #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) | |
540 | ||
541 | ether3_setbuffer(dev, buffer_write, next_ptr); | |
542 | ether3_writelong(dev, 0); | |
543 | ether3_setbuffer(dev, buffer_write, ptr); | |
544 | ether3_writelong(dev, 0); | |
545 | ether3_writebuffer(dev, skb->data, length); | |
546 | ether3_writeword(dev, htons(next_ptr)); | |
547 | ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); | |
548 | ether3_setbuffer(dev, buffer_write, ptr); | |
549 | ether3_writeword(dev, htons((ptr + length + 4))); | |
550 | ether3_writeword(dev, TXHDR_FLAGS >> 16); | |
551 | ether3_ledon(dev); | |
552 | ||
553 | if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { | |
554 | ether3_outw(ptr, REG_TRANSMITPTR); | |
555 | ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); | |
556 | } | |
557 | ||
558 | next_ptr = (priv(dev)->tx_head + 1) & 15; | |
559 | local_irq_restore(flags); | |
560 | ||
561 | dev_kfree_skb(skb); | |
562 | ||
563 | if (priv(dev)->tx_tail == next_ptr) | |
564 | netif_stop_queue(dev); | |
565 | ||
566 | out: | |
567 | return 0; | |
568 | } | |
569 | ||
570 | static irqreturn_t | |
571 | ether3_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
572 | { | |
573 | struct net_device *dev = (struct net_device *)dev_id; | |
574 | unsigned int status, handled = IRQ_NONE; | |
575 | ||
576 | #if NET_DEBUG > 1 | |
577 | if(net_debug & DEBUG_INT) | |
578 | printk("eth3irq: %d ", irq); | |
579 | #endif | |
580 | ||
581 | status = ether3_inw(REG_STATUS); | |
582 | ||
583 | if (status & STAT_INTRX) { | |
584 | ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); | |
585 | ether3_rx(dev, 12); | |
586 | handled = IRQ_HANDLED; | |
587 | } | |
588 | ||
589 | if (status & STAT_INTTX) { | |
590 | ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); | |
591 | ether3_tx(dev); | |
592 | handled = IRQ_HANDLED; | |
593 | } | |
594 | ||
595 | #if NET_DEBUG > 1 | |
596 | if(net_debug & DEBUG_INT) | |
597 | printk("done\n"); | |
598 | #endif | |
599 | return handled; | |
600 | } | |
601 | ||
602 | /* | |
603 | * If we have a good packet(s), get it/them out of the buffers. | |
604 | */ | |
605 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt) | |
606 | { | |
607 | unsigned int next_ptr = priv(dev)->rx_head, received = 0; | |
608 | ||
609 | ether3_ledon(dev); | |
610 | ||
611 | do { | |
612 | unsigned int this_ptr, status; | |
613 | unsigned char addrs[16]; | |
614 | ||
615 | /* | |
616 | * read the first 16 bytes from the buffer. | |
617 | * This contains the status bytes etc and ethernet addresses, | |
618 | * and we also check the source ethernet address to see if | |
619 | * it originated from us. | |
620 | */ | |
621 | { | |
622 | unsigned int temp_ptr; | |
623 | ether3_setbuffer(dev, buffer_read, next_ptr); | |
624 | temp_ptr = ether3_readword(dev); | |
625 | status = ether3_readword(dev); | |
626 | if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != | |
627 | (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) | |
628 | break; | |
629 | ||
630 | this_ptr = next_ptr + 4; | |
631 | next_ptr = ntohs(temp_ptr); | |
632 | } | |
633 | ether3_setbuffer(dev, buffer_read, this_ptr); | |
634 | ether3_readbuffer(dev, addrs+2, 12); | |
635 | ||
636 | if (next_ptr < RX_START || next_ptr >= RX_END) { | |
637 | int i; | |
638 | printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); | |
639 | printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); | |
640 | for (i = 2; i < 14; i++) | |
641 | printk("%02X ", addrs[i]); | |
642 | printk("\n"); | |
643 | next_ptr = priv(dev)->rx_head; | |
644 | break; | |
645 | } | |
646 | /* | |
647 | * ignore our own packets... | |
648 | */ | |
649 | if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && | |
650 | !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { | |
651 | maxcnt ++; /* compensate for loopedback packet */ | |
652 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
653 | } else | |
654 | if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { | |
655 | unsigned int length = next_ptr - this_ptr; | |
656 | struct sk_buff *skb; | |
657 | ||
658 | if (next_ptr <= this_ptr) | |
659 | length += RX_END - RX_START; | |
660 | ||
661 | skb = dev_alloc_skb(length + 2); | |
662 | if (skb) { | |
663 | unsigned char *buf; | |
664 | ||
665 | skb->dev = dev; | |
666 | skb_reserve(skb, 2); | |
667 | buf = skb_put(skb, length); | |
668 | ether3_readbuffer(dev, buf + 12, length - 12); | |
669 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
670 | *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); | |
671 | *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); | |
672 | *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); | |
673 | *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); | |
674 | skb->protocol = eth_type_trans(skb, dev); | |
675 | netif_rx(skb); | |
676 | received ++; | |
677 | } else | |
678 | goto dropping; | |
679 | } else { | |
680 | struct net_device_stats *stats = &priv(dev)->stats; | |
681 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
682 | if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; | |
683 | if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; | |
684 | if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; | |
685 | if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; | |
686 | stats->rx_errors++; | |
687 | } | |
688 | } | |
689 | while (-- maxcnt); | |
690 | ||
691 | done: | |
692 | priv(dev)->stats.rx_packets += received; | |
693 | priv(dev)->rx_head = next_ptr; | |
694 | /* | |
695 | * If rx went off line, then that means that the buffer may be full. We | |
696 | * have dropped at least one packet. | |
697 | */ | |
698 | if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { | |
699 | priv(dev)->stats.rx_dropped ++; | |
700 | ether3_outw(next_ptr, REG_RECVPTR); | |
701 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); | |
702 | } | |
703 | ||
704 | return maxcnt; | |
705 | ||
706 | dropping:{ | |
707 | static unsigned long last_warned; | |
708 | ||
709 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
710 | /* | |
711 | * Don't print this message too many times... | |
712 | */ | |
713 | if (time_after(jiffies, last_warned + 10 * HZ)) { | |
714 | last_warned = jiffies; | |
715 | printk("%s: memory squeeze, dropping packet.\n", dev->name); | |
716 | } | |
717 | priv(dev)->stats.rx_dropped ++; | |
718 | goto done; | |
719 | } | |
720 | } | |
721 | ||
722 | /* | |
723 | * Update stats for the transmitted packet(s) | |
724 | */ | |
725 | static void ether3_tx(struct net_device *dev) | |
726 | { | |
727 | unsigned int tx_tail = priv(dev)->tx_tail; | |
728 | int max_work = 14; | |
729 | ||
730 | do { | |
731 | unsigned long status; | |
732 | ||
733 | /* | |
734 | * Read the packet header | |
735 | */ | |
736 | ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); | |
737 | status = ether3_readlong(dev); | |
738 | ||
739 | /* | |
740 | * Check to see if this packet has been transmitted | |
741 | */ | |
742 | if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != | |
743 | (TXSTAT_DONE | TXHDR_TRANSMIT)) | |
744 | break; | |
745 | ||
746 | /* | |
747 | * Update errors | |
748 | */ | |
749 | if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) | |
750 | priv(dev)->stats.tx_packets++; | |
751 | else { | |
752 | priv(dev)->stats.tx_errors ++; | |
753 | if (status & TXSTAT_16COLLISIONS) | |
754 | priv(dev)->stats.collisions += 16; | |
755 | if (status & TXSTAT_BABBLED) | |
756 | priv(dev)->stats.tx_fifo_errors ++; | |
757 | } | |
758 | ||
759 | tx_tail = (tx_tail + 1) & 15; | |
760 | } while (--max_work); | |
761 | ||
762 | if (priv(dev)->tx_tail != tx_tail) { | |
763 | priv(dev)->tx_tail = tx_tail; | |
764 | netif_wake_queue(dev); | |
765 | } | |
766 | } | |
767 | ||
768 | static void __init ether3_banner(void) | |
769 | { | |
770 | static unsigned version_printed = 0; | |
771 | ||
772 | if (net_debug && version_printed++ == 0) | |
773 | printk(KERN_INFO "%s", version); | |
774 | } | |
775 | ||
776 | static int __devinit | |
777 | ether3_probe(struct expansion_card *ec, const struct ecard_id *id) | |
778 | { | |
779 | const struct ether3_data *data = id->data; | |
780 | struct net_device *dev; | |
781 | int i, bus_type, ret; | |
782 | ||
783 | ether3_banner(); | |
784 | ||
785 | ret = ecard_request_resources(ec); | |
786 | if (ret) | |
787 | goto out; | |
788 | ||
789 | dev = alloc_etherdev(sizeof(struct dev_priv)); | |
790 | if (!dev) { | |
791 | ret = -ENOMEM; | |
792 | goto release; | |
793 | } | |
794 | ||
795 | SET_MODULE_OWNER(dev); | |
796 | SET_NETDEV_DEV(dev, &ec->dev); | |
797 | ||
798 | priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), | |
799 | ecard_resource_len(ec, ECARD_RES_MEMC)); | |
800 | if (!priv(dev)->base) { | |
801 | ret = -ENOMEM; | |
802 | goto free; | |
803 | } | |
804 | ||
805 | ec->irqaddr = priv(dev)->base + data->base_offset; | |
806 | ec->irqmask = 0xf0; | |
807 | ||
808 | priv(dev)->seeq = priv(dev)->base + data->base_offset; | |
809 | dev->irq = ec->irq; | |
810 | ||
811 | ether3_addr(dev->dev_addr, ec); | |
812 | ||
813 | init_timer(&priv(dev)->timer); | |
814 | ||
815 | /* Reset card... | |
816 | */ | |
817 | ether3_outb(0x80, REG_CONFIG2 + 4); | |
818 | bus_type = BUS_UNKNOWN; | |
819 | udelay(4); | |
820 | ||
821 | /* Test using Receive Pointer (16-bit register) to find out | |
822 | * how the ether3 is connected to the bus... | |
823 | */ | |
824 | if (ether3_probe_bus_8(dev, 0x100) && | |
825 | ether3_probe_bus_8(dev, 0x201)) | |
826 | bus_type = BUS_8; | |
827 | ||
828 | if (bus_type == BUS_UNKNOWN && | |
829 | ether3_probe_bus_16(dev, 0x101) && | |
830 | ether3_probe_bus_16(dev, 0x201)) | |
831 | bus_type = BUS_16; | |
832 | ||
833 | switch (bus_type) { | |
834 | case BUS_UNKNOWN: | |
835 | printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); | |
836 | ret = -ENODEV; | |
837 | goto free; | |
838 | ||
839 | case BUS_8: | |
840 | printk(KERN_ERR "%s: %s found, but is an unsupported " | |
841 | "8-bit card\n", dev->name, data->name); | |
842 | ret = -ENODEV; | |
843 | goto free; | |
844 | ||
845 | default: | |
846 | break; | |
847 | } | |
848 | ||
849 | if (ether3_init_2(dev)) { | |
850 | ret = -ENODEV; | |
851 | goto free; | |
852 | } | |
853 | ||
854 | dev->open = ether3_open; | |
855 | dev->stop = ether3_close; | |
856 | dev->hard_start_xmit = ether3_sendpacket; | |
857 | dev->get_stats = ether3_getstats; | |
858 | dev->set_multicast_list = ether3_setmulticastlist; | |
859 | dev->tx_timeout = ether3_timeout; | |
860 | dev->watchdog_timeo = 5 * HZ / 100; | |
861 | ||
862 | ret = register_netdev(dev); | |
863 | if (ret) | |
864 | goto free; | |
865 | ||
866 | printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no); | |
867 | for (i = 0; i < 6; i++) | |
868 | printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); | |
869 | ||
870 | ecard_set_drvdata(ec, dev); | |
871 | return 0; | |
872 | ||
873 | free: | |
874 | if (priv(dev)->base) | |
875 | iounmap(priv(dev)->base); | |
876 | free_netdev(dev); | |
877 | release: | |
878 | ecard_release_resources(ec); | |
879 | out: | |
880 | return ret; | |
881 | } | |
882 | ||
883 | static void __devexit ether3_remove(struct expansion_card *ec) | |
884 | { | |
885 | struct net_device *dev = ecard_get_drvdata(ec); | |
886 | ||
887 | ecard_set_drvdata(ec, NULL); | |
888 | ||
889 | unregister_netdev(dev); | |
890 | iounmap(priv(dev)->base); | |
891 | free_netdev(dev); | |
892 | ecard_release_resources(ec); | |
893 | } | |
894 | ||
895 | static struct ether3_data ether3 = { | |
896 | .name = "ether3", | |
897 | .base_offset = 0, | |
898 | }; | |
899 | ||
900 | static struct ether3_data etherb = { | |
901 | .name = "etherb", | |
902 | .base_offset = 0x800, | |
903 | }; | |
904 | ||
905 | static const struct ecard_id ether3_ids[] = { | |
906 | { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, | |
907 | { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, | |
908 | { MANU_ANT, PROD_ANT_ETHERB, ðerb }, | |
909 | { 0xffff, 0xffff } | |
910 | }; | |
911 | ||
912 | static struct ecard_driver ether3_driver = { | |
913 | .probe = ether3_probe, | |
914 | .remove = __devexit_p(ether3_remove), | |
915 | .id_table = ether3_ids, | |
916 | .drv = { | |
917 | .name = "ether3", | |
918 | }, | |
919 | }; | |
920 | ||
921 | static int __init ether3_init(void) | |
922 | { | |
923 | return ecard_register_driver(ðer3_driver); | |
924 | } | |
925 | ||
926 | static void __exit ether3_exit(void) | |
927 | { | |
928 | ecard_remove_driver(ðer3_driver); | |
929 | } | |
930 | ||
931 | module_init(ether3_init); | |
932 | module_exit(ether3_exit); | |
933 | ||
934 | MODULE_LICENSE("GPL"); |