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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> | |
1da177e4 LT |
51 | #include <linux/types.h> |
52 | #include <linux/fcntl.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/ptrace.h> | |
55 | #include <linux/ioport.h> | |
56 | #include <linux/in.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/string.h> | |
59 | #include <linux/errno.h> | |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/etherdevice.h> | |
62 | #include <linux/skbuff.h> | |
63 | #include <linux/device.h> | |
64 | #include <linux/init.h> | |
65 | #include <linux/delay.h> | |
66 | #include <linux/bitops.h> | |
67 | ||
68 | #include <asm/system.h> | |
69 | #include <asm/ecard.h> | |
70 | #include <asm/io.h> | |
1da177e4 LT |
71 | |
72 | static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; | |
73 | ||
74 | #include "ether3.h" | |
75 | ||
76 | static unsigned int net_debug = NET_DEBUG; | |
77 | ||
78 | static void ether3_setmulticastlist(struct net_device *dev); | |
79 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt); | |
80 | static void ether3_tx(struct net_device *dev); | |
81 | static int ether3_open (struct net_device *dev); | |
82 | static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev); | |
7d12e780 | 83 | static irqreturn_t ether3_interrupt (int irq, void *dev_id); |
1da177e4 LT |
84 | static int ether3_close (struct net_device *dev); |
85 | static struct net_device_stats *ether3_getstats (struct net_device *dev); | |
86 | static void ether3_setmulticastlist (struct net_device *dev); | |
87 | static void ether3_timeout(struct net_device *dev); | |
88 | ||
89 | #define BUS_16 2 | |
90 | #define BUS_8 1 | |
91 | #define BUS_UNKNOWN 0 | |
92 | ||
93 | /* --------------------------------------------------------------------------- */ | |
94 | ||
95 | typedef enum { | |
96 | buffer_write, | |
97 | buffer_read | |
98 | } buffer_rw_t; | |
99 | ||
100 | /* | |
101 | * ether3 read/write. Slow things down a bit... | |
102 | * The SEEQ8005 doesn't like us writing to its registers | |
103 | * too quickly. | |
104 | */ | |
105 | static inline void ether3_outb(int v, const void __iomem *r) | |
106 | { | |
107 | writeb(v, r); | |
108 | udelay(1); | |
109 | } | |
110 | ||
111 | static inline void ether3_outw(int v, const void __iomem *r) | |
112 | { | |
113 | writew(v, r); | |
114 | udelay(1); | |
115 | } | |
116 | #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) | |
117 | #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) | |
118 | ||
119 | static int | |
120 | ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) | |
121 | { | |
122 | int timeout = 1000; | |
123 | ||
124 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
125 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); | |
126 | ||
127 | while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { | |
128 | if (!timeout--) { | |
129 | printk("%s: setbuffer broken\n", dev->name); | |
130 | priv(dev)->broken = 1; | |
131 | return 1; | |
132 | } | |
133 | udelay(1); | |
134 | } | |
135 | ||
136 | if (read == buffer_read) { | |
137 | ether3_outw(start, REG_DMAADDR); | |
138 | ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); | |
139 | } else { | |
140 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); | |
141 | ether3_outw(start, REG_DMAADDR); | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | /* | |
147 | * write data to the buffer memory | |
148 | */ | |
149 | #define ether3_writebuffer(dev,data,length) \ | |
150 | writesw(REG_BUFWIN, (data), (length) >> 1) | |
151 | ||
152 | #define ether3_writeword(dev,data) \ | |
153 | writew((data), REG_BUFWIN) | |
154 | ||
155 | #define ether3_writelong(dev,data) { \ | |
156 | void __iomem *reg_bufwin = REG_BUFWIN; \ | |
157 | writew((data), reg_bufwin); \ | |
158 | writew((data) >> 16, reg_bufwin); \ | |
159 | } | |
160 | ||
161 | /* | |
162 | * read data from the buffer memory | |
163 | */ | |
164 | #define ether3_readbuffer(dev,data,length) \ | |
165 | readsw(REG_BUFWIN, (data), (length) >> 1) | |
166 | ||
167 | #define ether3_readword(dev) \ | |
168 | readw(REG_BUFWIN) | |
169 | ||
170 | #define ether3_readlong(dev) \ | |
171 | readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) | |
172 | ||
173 | /* | |
174 | * Switch LED off... | |
175 | */ | |
176 | static void ether3_ledoff(unsigned long data) | |
177 | { | |
178 | struct net_device *dev = (struct net_device *)data; | |
179 | ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); | |
180 | } | |
181 | ||
182 | /* | |
183 | * switch LED on... | |
184 | */ | |
185 | static inline void ether3_ledon(struct net_device *dev) | |
186 | { | |
187 | del_timer(&priv(dev)->timer); | |
188 | priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ | |
189 | priv(dev)->timer.data = (unsigned long)dev; | |
190 | priv(dev)->timer.function = ether3_ledoff; | |
191 | add_timer(&priv(dev)->timer); | |
192 | if (priv(dev)->regs.config2 & CFG2_CTRLO) | |
193 | ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); | |
194 | } | |
195 | ||
196 | /* | |
197 | * Read the ethernet address string from the on board rom. | |
198 | * This is an ascii string!!! | |
199 | */ | |
bffa2154 | 200 | static int __devinit |
1da177e4 LT |
201 | ether3_addr(char *addr, struct expansion_card *ec) |
202 | { | |
203 | struct in_chunk_dir cd; | |
204 | char *s; | |
205 | ||
206 | if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { | |
207 | int i; | |
208 | for (i = 0; i<6; i++) { | |
209 | addr[i] = simple_strtoul(s + 1, &s, 0x10); | |
210 | if (*s != (i==5?')' : ':' )) | |
211 | break; | |
212 | } | |
213 | if (i == 6) | |
214 | return 0; | |
215 | } | |
216 | /* I wonder if we should even let the user continue in this case | |
217 | * - no, it would be better to disable the device | |
218 | */ | |
219 | printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); | |
220 | return -ENODEV; | |
221 | } | |
222 | ||
223 | /* --------------------------------------------------------------------------- */ | |
224 | ||
bffa2154 | 225 | static int __devinit |
1da177e4 LT |
226 | ether3_ramtest(struct net_device *dev, unsigned char byte) |
227 | { | |
228 | unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); | |
229 | int i,ret = 0; | |
230 | int max_errors = 4; | |
231 | int bad = -1; | |
232 | ||
233 | if (!buffer) | |
234 | return 1; | |
235 | ||
236 | memset(buffer, byte, RX_END); | |
237 | ether3_setbuffer(dev, buffer_write, 0); | |
238 | ether3_writebuffer(dev, buffer, TX_END); | |
239 | ether3_setbuffer(dev, buffer_write, RX_START); | |
240 | ether3_writebuffer(dev, buffer + RX_START, RX_LEN); | |
241 | memset(buffer, byte ^ 0xff, RX_END); | |
242 | ether3_setbuffer(dev, buffer_read, 0); | |
243 | ether3_readbuffer(dev, buffer, TX_END); | |
244 | ether3_setbuffer(dev, buffer_read, RX_START); | |
245 | ether3_readbuffer(dev, buffer + RX_START, RX_LEN); | |
246 | ||
247 | for (i = 0; i < RX_END; i++) { | |
248 | if (buffer[i] != byte) { | |
249 | if (max_errors > 0 && bad != buffer[i]) { | |
250 | printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", | |
251 | dev->name, buffer[i], byte, i); | |
252 | ret = 2; | |
253 | max_errors--; | |
254 | bad = i; | |
255 | } | |
256 | } else { | |
257 | if (bad != -1) { | |
258 | if (bad != i - 1) | |
259 | printk(" - 0x%04X\n", i - 1); | |
260 | printk("\n"); | |
261 | bad = -1; | |
262 | } | |
263 | } | |
264 | } | |
265 | if (bad != -1) | |
266 | printk(" - 0xffff\n"); | |
267 | kfree(buffer); | |
268 | ||
269 | return ret; | |
270 | } | |
271 | ||
272 | /* ------------------------------------------------------------------------------- */ | |
273 | ||
bffa2154 | 274 | static int __devinit ether3_init_2(struct net_device *dev) |
1da177e4 LT |
275 | { |
276 | int i; | |
277 | ||
278 | priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; | |
279 | priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; | |
280 | priv(dev)->regs.command = 0; | |
281 | ||
282 | /* | |
283 | * Set up our hardware address | |
284 | */ | |
285 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); | |
286 | for (i = 0; i < 6; i++) | |
287 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); | |
288 | ||
289 | if (dev->flags & IFF_PROMISC) | |
290 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; | |
291 | else if (dev->flags & IFF_MULTICAST) | |
292 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; | |
293 | else | |
294 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; | |
295 | ||
296 | /* | |
297 | * There is a problem with the NQ8005 in that it occasionally loses the | |
298 | * last two bytes. To get round this problem, we receive the CRC as | |
299 | * well. That way, if we do lose the last two, then it doesn't matter. | |
300 | */ | |
301 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); | |
302 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); | |
303 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); | |
304 | ether3_outw(0, REG_TRANSMITPTR); | |
305 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); | |
306 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
307 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
308 | ether3_outw(priv(dev)->regs.command, REG_COMMAND); | |
309 | ||
310 | i = ether3_ramtest(dev, 0x5A); | |
311 | if(i) | |
312 | return i; | |
313 | i = ether3_ramtest(dev, 0x1E); | |
314 | if(i) | |
315 | return i; | |
316 | ||
317 | ether3_setbuffer(dev, buffer_write, 0); | |
318 | ether3_writelong(dev, 0); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static void | |
323 | ether3_init_for_open(struct net_device *dev) | |
324 | { | |
325 | int i; | |
326 | ||
327 | memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats)); | |
328 | ||
329 | /* Reset the chip */ | |
330 | ether3_outw(CFG2_RESET, REG_CONFIG2); | |
331 | udelay(4); | |
332 | ||
333 | priv(dev)->regs.command = 0; | |
334 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); | |
335 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) | |
336 | barrier(); | |
337 | ||
338 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); | |
339 | for (i = 0; i < 6; i++) | |
340 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); | |
341 | ||
342 | priv(dev)->tx_head = 0; | |
343 | priv(dev)->tx_tail = 0; | |
344 | priv(dev)->regs.config2 |= CFG2_CTRLO; | |
345 | priv(dev)->rx_head = RX_START; | |
346 | ||
347 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); | |
348 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); | |
349 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); | |
350 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); | |
351 | ether3_outw(0, REG_TRANSMITPTR); | |
352 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
353 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
354 | ||
355 | ether3_setbuffer(dev, buffer_write, 0); | |
356 | ether3_writelong(dev, 0); | |
357 | ||
358 | priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; | |
359 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); | |
360 | } | |
361 | ||
362 | static inline int | |
363 | ether3_probe_bus_8(struct net_device *dev, int val) | |
364 | { | |
365 | int write_low, write_high, read_low, read_high; | |
366 | ||
367 | write_low = val & 255; | |
368 | write_high = val >> 8; | |
369 | ||
370 | printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); | |
371 | ||
372 | ether3_outb(write_low, REG_RECVPTR); | |
373 | ether3_outb(write_high, REG_RECVPTR + 4); | |
374 | ||
375 | read_low = ether3_inb(REG_RECVPTR); | |
376 | read_high = ether3_inb(REG_RECVPTR + 4); | |
377 | ||
378 | printk(", read8 [%02X:%02X]\n", read_high, read_low); | |
379 | ||
380 | return read_low == write_low && read_high == write_high; | |
381 | } | |
382 | ||
383 | static inline int | |
384 | ether3_probe_bus_16(struct net_device *dev, int val) | |
385 | { | |
386 | int read_val; | |
387 | ||
388 | ether3_outw(val, REG_RECVPTR); | |
389 | read_val = ether3_inw(REG_RECVPTR); | |
390 | ||
391 | printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); | |
392 | ||
393 | return read_val == val; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Open/initialize the board. This is called (in the current kernel) | |
398 | * sometime after booting when the 'ifconfig' program is run. | |
399 | * | |
400 | * This routine should set everything up anew at each open, even | |
401 | * registers that "should" only need to be set once at boot, so that | |
402 | * there is non-reboot way to recover if something goes wrong. | |
403 | */ | |
404 | static int | |
405 | ether3_open(struct net_device *dev) | |
406 | { | |
407 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
408 | printk(KERN_WARNING "%s: invalid ethernet MAC address\n", | |
409 | dev->name); | |
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) | |
414 | return -EAGAIN; | |
415 | ||
416 | ether3_init_for_open(dev); | |
417 | ||
418 | netif_start_queue(dev); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | /* | |
424 | * The inverse routine to ether3_open(). | |
425 | */ | |
426 | static int | |
427 | ether3_close(struct net_device *dev) | |
428 | { | |
429 | netif_stop_queue(dev); | |
430 | ||
431 | disable_irq(dev->irq); | |
432 | ||
433 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); | |
434 | priv(dev)->regs.command = 0; | |
435 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) | |
436 | barrier(); | |
437 | ether3_outb(0x80, REG_CONFIG2 + 4); | |
438 | ether3_outw(0, REG_COMMAND); | |
439 | ||
440 | free_irq(dev->irq, dev); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Get the current statistics. This may be called with the card open or | |
447 | * closed. | |
448 | */ | |
449 | static struct net_device_stats *ether3_getstats(struct net_device *dev) | |
450 | { | |
451 | return &priv(dev)->stats; | |
452 | } | |
453 | ||
454 | /* | |
455 | * Set or clear promiscuous/multicast mode filter for this adaptor. | |
456 | * | |
457 | * We don't attempt any packet filtering. The card may have a SEEQ 8004 | |
458 | * in which does not have the other ethernet address registers present... | |
459 | */ | |
460 | static void ether3_setmulticastlist(struct net_device *dev) | |
461 | { | |
462 | priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; | |
463 | ||
464 | if (dev->flags & IFF_PROMISC) { | |
465 | /* promiscuous mode */ | |
466 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; | |
467 | } else if (dev->flags & IFF_ALLMULTI) { | |
468 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; | |
469 | } else | |
470 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; | |
471 | ||
472 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); | |
473 | } | |
474 | ||
475 | static void ether3_timeout(struct net_device *dev) | |
476 | { | |
477 | unsigned long flags; | |
478 | ||
479 | del_timer(&priv(dev)->timer); | |
480 | ||
481 | local_irq_save(flags); | |
482 | printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); | |
483 | printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, | |
484 | ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); | |
485 | printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, | |
486 | ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); | |
487 | printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, | |
488 | priv(dev)->tx_head, priv(dev)->tx_tail); | |
489 | ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); | |
490 | printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); | |
491 | local_irq_restore(flags); | |
492 | ||
493 | priv(dev)->regs.config2 |= CFG2_CTRLO; | |
494 | priv(dev)->stats.tx_errors += 1; | |
495 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); | |
496 | priv(dev)->tx_head = priv(dev)->tx_tail = 0; | |
497 | ||
498 | netif_wake_queue(dev); | |
499 | } | |
500 | ||
501 | /* | |
502 | * Transmit a packet | |
503 | */ | |
504 | static int | |
505 | ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) | |
506 | { | |
507 | unsigned long flags; | |
508 | unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
509 | unsigned int ptr, next_ptr; | |
510 | ||
511 | if (priv(dev)->broken) { | |
512 | dev_kfree_skb(skb); | |
513 | priv(dev)->stats.tx_dropped ++; | |
514 | netif_start_queue(dev); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | length = (length + 1) & ~1; | |
519 | if (length != skb->len) { | |
5b057c6b | 520 | if (skb_padto(skb, length)) |
1da177e4 LT |
521 | goto out; |
522 | } | |
523 | ||
524 | next_ptr = (priv(dev)->tx_head + 1) & 15; | |
525 | ||
526 | local_irq_save(flags); | |
527 | ||
528 | if (priv(dev)->tx_tail == next_ptr) { | |
529 | local_irq_restore(flags); | |
530 | return 1; /* unable to queue */ | |
531 | } | |
532 | ||
533 | dev->trans_start = jiffies; | |
534 | ptr = 0x600 * priv(dev)->tx_head; | |
535 | priv(dev)->tx_head = next_ptr; | |
536 | next_ptr *= 0x600; | |
537 | ||
538 | #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) | |
539 | ||
540 | ether3_setbuffer(dev, buffer_write, next_ptr); | |
541 | ether3_writelong(dev, 0); | |
542 | ether3_setbuffer(dev, buffer_write, ptr); | |
543 | ether3_writelong(dev, 0); | |
544 | ether3_writebuffer(dev, skb->data, length); | |
545 | ether3_writeword(dev, htons(next_ptr)); | |
546 | ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); | |
547 | ether3_setbuffer(dev, buffer_write, ptr); | |
548 | ether3_writeword(dev, htons((ptr + length + 4))); | |
549 | ether3_writeword(dev, TXHDR_FLAGS >> 16); | |
550 | ether3_ledon(dev); | |
551 | ||
552 | if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { | |
553 | ether3_outw(ptr, REG_TRANSMITPTR); | |
554 | ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); | |
555 | } | |
556 | ||
557 | next_ptr = (priv(dev)->tx_head + 1) & 15; | |
558 | local_irq_restore(flags); | |
559 | ||
560 | dev_kfree_skb(skb); | |
561 | ||
562 | if (priv(dev)->tx_tail == next_ptr) | |
563 | netif_stop_queue(dev); | |
564 | ||
565 | out: | |
566 | return 0; | |
567 | } | |
568 | ||
569 | static irqreturn_t | |
7d12e780 | 570 | ether3_interrupt(int irq, void *dev_id) |
1da177e4 LT |
571 | { |
572 | struct net_device *dev = (struct net_device *)dev_id; | |
573 | unsigned int status, handled = IRQ_NONE; | |
574 | ||
575 | #if NET_DEBUG > 1 | |
576 | if(net_debug & DEBUG_INT) | |
577 | printk("eth3irq: %d ", irq); | |
578 | #endif | |
579 | ||
580 | status = ether3_inw(REG_STATUS); | |
581 | ||
582 | if (status & STAT_INTRX) { | |
583 | ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); | |
584 | ether3_rx(dev, 12); | |
585 | handled = IRQ_HANDLED; | |
586 | } | |
587 | ||
588 | if (status & STAT_INTTX) { | |
589 | ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); | |
590 | ether3_tx(dev); | |
591 | handled = IRQ_HANDLED; | |
592 | } | |
593 | ||
594 | #if NET_DEBUG > 1 | |
595 | if(net_debug & DEBUG_INT) | |
596 | printk("done\n"); | |
597 | #endif | |
598 | return handled; | |
599 | } | |
600 | ||
601 | /* | |
602 | * If we have a good packet(s), get it/them out of the buffers. | |
603 | */ | |
604 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt) | |
605 | { | |
606 | unsigned int next_ptr = priv(dev)->rx_head, received = 0; | |
607 | ||
608 | ether3_ledon(dev); | |
609 | ||
610 | do { | |
611 | unsigned int this_ptr, status; | |
612 | unsigned char addrs[16]; | |
613 | ||
614 | /* | |
615 | * read the first 16 bytes from the buffer. | |
616 | * This contains the status bytes etc and ethernet addresses, | |
617 | * and we also check the source ethernet address to see if | |
618 | * it originated from us. | |
619 | */ | |
620 | { | |
621 | unsigned int temp_ptr; | |
622 | ether3_setbuffer(dev, buffer_read, next_ptr); | |
623 | temp_ptr = ether3_readword(dev); | |
624 | status = ether3_readword(dev); | |
625 | if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != | |
626 | (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) | |
627 | break; | |
628 | ||
629 | this_ptr = next_ptr + 4; | |
630 | next_ptr = ntohs(temp_ptr); | |
631 | } | |
632 | ether3_setbuffer(dev, buffer_read, this_ptr); | |
633 | ether3_readbuffer(dev, addrs+2, 12); | |
634 | ||
635 | if (next_ptr < RX_START || next_ptr >= RX_END) { | |
636 | int i; | |
637 | printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); | |
638 | printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); | |
639 | for (i = 2; i < 14; i++) | |
640 | printk("%02X ", addrs[i]); | |
641 | printk("\n"); | |
642 | next_ptr = priv(dev)->rx_head; | |
643 | break; | |
644 | } | |
645 | /* | |
646 | * ignore our own packets... | |
647 | */ | |
648 | if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && | |
649 | !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { | |
650 | maxcnt ++; /* compensate for loopedback packet */ | |
651 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
652 | } else | |
653 | if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { | |
654 | unsigned int length = next_ptr - this_ptr; | |
655 | struct sk_buff *skb; | |
656 | ||
657 | if (next_ptr <= this_ptr) | |
658 | length += RX_END - RX_START; | |
659 | ||
660 | skb = dev_alloc_skb(length + 2); | |
661 | if (skb) { | |
662 | unsigned char *buf; | |
663 | ||
1da177e4 LT |
664 | skb_reserve(skb, 2); |
665 | buf = skb_put(skb, length); | |
666 | ether3_readbuffer(dev, buf + 12, length - 12); | |
667 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
668 | *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); | |
669 | *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); | |
670 | *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); | |
671 | *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); | |
672 | skb->protocol = eth_type_trans(skb, dev); | |
673 | netif_rx(skb); | |
674 | received ++; | |
675 | } else | |
676 | goto dropping; | |
677 | } else { | |
678 | struct net_device_stats *stats = &priv(dev)->stats; | |
679 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
680 | if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; | |
681 | if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; | |
682 | if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; | |
683 | if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; | |
684 | stats->rx_errors++; | |
685 | } | |
686 | } | |
687 | while (-- maxcnt); | |
688 | ||
689 | done: | |
690 | priv(dev)->stats.rx_packets += received; | |
691 | priv(dev)->rx_head = next_ptr; | |
692 | /* | |
693 | * If rx went off line, then that means that the buffer may be full. We | |
694 | * have dropped at least one packet. | |
695 | */ | |
696 | if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { | |
697 | priv(dev)->stats.rx_dropped ++; | |
698 | ether3_outw(next_ptr, REG_RECVPTR); | |
699 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); | |
700 | } | |
701 | ||
702 | return maxcnt; | |
703 | ||
704 | dropping:{ | |
705 | static unsigned long last_warned; | |
706 | ||
707 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
708 | /* | |
709 | * Don't print this message too many times... | |
710 | */ | |
711 | if (time_after(jiffies, last_warned + 10 * HZ)) { | |
712 | last_warned = jiffies; | |
713 | printk("%s: memory squeeze, dropping packet.\n", dev->name); | |
714 | } | |
715 | priv(dev)->stats.rx_dropped ++; | |
716 | goto done; | |
717 | } | |
718 | } | |
719 | ||
720 | /* | |
721 | * Update stats for the transmitted packet(s) | |
722 | */ | |
723 | static void ether3_tx(struct net_device *dev) | |
724 | { | |
725 | unsigned int tx_tail = priv(dev)->tx_tail; | |
726 | int max_work = 14; | |
727 | ||
728 | do { | |
729 | unsigned long status; | |
730 | ||
731 | /* | |
732 | * Read the packet header | |
733 | */ | |
734 | ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); | |
735 | status = ether3_readlong(dev); | |
736 | ||
737 | /* | |
738 | * Check to see if this packet has been transmitted | |
739 | */ | |
740 | if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != | |
741 | (TXSTAT_DONE | TXHDR_TRANSMIT)) | |
742 | break; | |
743 | ||
744 | /* | |
745 | * Update errors | |
746 | */ | |
747 | if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) | |
748 | priv(dev)->stats.tx_packets++; | |
749 | else { | |
750 | priv(dev)->stats.tx_errors ++; | |
751 | if (status & TXSTAT_16COLLISIONS) | |
752 | priv(dev)->stats.collisions += 16; | |
753 | if (status & TXSTAT_BABBLED) | |
754 | priv(dev)->stats.tx_fifo_errors ++; | |
755 | } | |
756 | ||
757 | tx_tail = (tx_tail + 1) & 15; | |
758 | } while (--max_work); | |
759 | ||
760 | if (priv(dev)->tx_tail != tx_tail) { | |
761 | priv(dev)->tx_tail = tx_tail; | |
762 | netif_wake_queue(dev); | |
763 | } | |
764 | } | |
765 | ||
bffa2154 | 766 | static void __devinit ether3_banner(void) |
1da177e4 LT |
767 | { |
768 | static unsigned version_printed = 0; | |
769 | ||
770 | if (net_debug && version_printed++ == 0) | |
771 | printk(KERN_INFO "%s", version); | |
772 | } | |
773 | ||
774 | static int __devinit | |
775 | ether3_probe(struct expansion_card *ec, const struct ecard_id *id) | |
776 | { | |
777 | const struct ether3_data *data = id->data; | |
778 | struct net_device *dev; | |
779 | int i, bus_type, ret; | |
780 | ||
781 | ether3_banner(); | |
782 | ||
783 | ret = ecard_request_resources(ec); | |
784 | if (ret) | |
785 | goto out; | |
786 | ||
787 | dev = alloc_etherdev(sizeof(struct dev_priv)); | |
788 | if (!dev) { | |
789 | ret = -ENOMEM; | |
790 | goto release; | |
791 | } | |
792 | ||
793 | SET_MODULE_OWNER(dev); | |
794 | SET_NETDEV_DEV(dev, &ec->dev); | |
795 | ||
796 | priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), | |
797 | ecard_resource_len(ec, ECARD_RES_MEMC)); | |
798 | if (!priv(dev)->base) { | |
799 | ret = -ENOMEM; | |
800 | goto free; | |
801 | } | |
802 | ||
803 | ec->irqaddr = priv(dev)->base + data->base_offset; | |
804 | ec->irqmask = 0xf0; | |
805 | ||
806 | priv(dev)->seeq = priv(dev)->base + data->base_offset; | |
807 | dev->irq = ec->irq; | |
808 | ||
809 | ether3_addr(dev->dev_addr, ec); | |
810 | ||
811 | init_timer(&priv(dev)->timer); | |
812 | ||
813 | /* Reset card... | |
814 | */ | |
815 | ether3_outb(0x80, REG_CONFIG2 + 4); | |
816 | bus_type = BUS_UNKNOWN; | |
817 | udelay(4); | |
818 | ||
819 | /* Test using Receive Pointer (16-bit register) to find out | |
820 | * how the ether3 is connected to the bus... | |
821 | */ | |
822 | if (ether3_probe_bus_8(dev, 0x100) && | |
823 | ether3_probe_bus_8(dev, 0x201)) | |
824 | bus_type = BUS_8; | |
825 | ||
826 | if (bus_type == BUS_UNKNOWN && | |
827 | ether3_probe_bus_16(dev, 0x101) && | |
828 | ether3_probe_bus_16(dev, 0x201)) | |
829 | bus_type = BUS_16; | |
830 | ||
831 | switch (bus_type) { | |
832 | case BUS_UNKNOWN: | |
833 | printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); | |
834 | ret = -ENODEV; | |
835 | goto free; | |
836 | ||
837 | case BUS_8: | |
838 | printk(KERN_ERR "%s: %s found, but is an unsupported " | |
839 | "8-bit card\n", dev->name, data->name); | |
840 | ret = -ENODEV; | |
841 | goto free; | |
842 | ||
843 | default: | |
844 | break; | |
845 | } | |
846 | ||
847 | if (ether3_init_2(dev)) { | |
848 | ret = -ENODEV; | |
849 | goto free; | |
850 | } | |
851 | ||
852 | dev->open = ether3_open; | |
853 | dev->stop = ether3_close; | |
854 | dev->hard_start_xmit = ether3_sendpacket; | |
855 | dev->get_stats = ether3_getstats; | |
856 | dev->set_multicast_list = ether3_setmulticastlist; | |
857 | dev->tx_timeout = ether3_timeout; | |
858 | dev->watchdog_timeo = 5 * HZ / 100; | |
859 | ||
860 | ret = register_netdev(dev); | |
861 | if (ret) | |
862 | goto free; | |
863 | ||
864 | printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no); | |
865 | for (i = 0; i < 6; i++) | |
866 | printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); | |
867 | ||
868 | ecard_set_drvdata(ec, dev); | |
869 | return 0; | |
870 | ||
871 | free: | |
872 | if (priv(dev)->base) | |
873 | iounmap(priv(dev)->base); | |
874 | free_netdev(dev); | |
875 | release: | |
876 | ecard_release_resources(ec); | |
877 | out: | |
878 | return ret; | |
879 | } | |
880 | ||
881 | static void __devexit ether3_remove(struct expansion_card *ec) | |
882 | { | |
883 | struct net_device *dev = ecard_get_drvdata(ec); | |
884 | ||
885 | ecard_set_drvdata(ec, NULL); | |
886 | ||
887 | unregister_netdev(dev); | |
888 | iounmap(priv(dev)->base); | |
889 | free_netdev(dev); | |
890 | ecard_release_resources(ec); | |
891 | } | |
892 | ||
893 | static struct ether3_data ether3 = { | |
894 | .name = "ether3", | |
895 | .base_offset = 0, | |
896 | }; | |
897 | ||
898 | static struct ether3_data etherb = { | |
899 | .name = "etherb", | |
900 | .base_offset = 0x800, | |
901 | }; | |
902 | ||
903 | static const struct ecard_id ether3_ids[] = { | |
904 | { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, | |
905 | { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, | |
906 | { MANU_ANT, PROD_ANT_ETHERB, ðerb }, | |
907 | { 0xffff, 0xffff } | |
908 | }; | |
909 | ||
910 | static struct ecard_driver ether3_driver = { | |
911 | .probe = ether3_probe, | |
912 | .remove = __devexit_p(ether3_remove), | |
913 | .id_table = ether3_ids, | |
914 | .drv = { | |
915 | .name = "ether3", | |
916 | }, | |
917 | }; | |
918 | ||
919 | static int __init ether3_init(void) | |
920 | { | |
921 | return ecard_register_driver(ðer3_driver); | |
922 | } | |
923 | ||
924 | static void __exit ether3_exit(void) | |
925 | { | |
926 | ecard_remove_driver(ðer3_driver); | |
927 | } | |
928 | ||
929 | module_init(ether3_init); | |
930 | module_exit(ether3_exit); | |
931 | ||
932 | MODULE_LICENSE("GPL"); |