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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/drivers/acorn/net/ether3.c | |
4 | * | |
5 | * Copyright (C) 1995-2000 Russell King | |
6 | * | |
1da177e4 LT |
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> | |
1da177e4 LT |
48 | #include <linux/types.h> |
49 | #include <linux/fcntl.h> | |
50 | #include <linux/interrupt.h> | |
1da177e4 LT |
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 | ||
1da177e4 LT |
64 | #include <asm/ecard.h> |
65 | #include <asm/io.h> | |
1da177e4 | 66 | |
5911ce0d | 67 | static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; |
1da177e4 LT |
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); | |
72b46279 Y |
77 | static netdev_tx_t ether3_sendpacket(struct sk_buff *skb, |
78 | struct net_device *dev); | |
7d12e780 | 79 | static irqreturn_t ether3_interrupt (int irq, void *dev_id); |
1da177e4 | 80 | static int ether3_close (struct net_device *dev); |
1da177e4 LT |
81 | static void ether3_setmulticastlist (struct net_device *dev); |
82 | static void ether3_timeout(struct net_device *dev); | |
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 | */ | |
a019c5e2 | 100 | static inline void ether3_outb(int v, void __iomem *r) |
1da177e4 LT |
101 | { |
102 | writeb(v, r); | |
103 | udelay(1); | |
104 | } | |
105 | ||
a019c5e2 | 106 | static inline void ether3_outw(int v, void __iomem *r) |
1da177e4 LT |
107 | { |
108 | writew(v, 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(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(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 | */ | |
6fd9c53f | 171 | static void ether3_ledoff(struct timer_list *t) |
1da177e4 | 172 | { |
9691cea9 | 173 | struct dev_priv *private = from_timer(private, t, timer); |
6fd9c53f KC |
174 | struct net_device *dev = private->dev; |
175 | ||
1da177e4 LT |
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(&priv(dev)->timer); | |
185 | priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ | |
1da177e4 LT |
186 | add_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 | */ | |
5911ce0d | 195 | static int |
1da177e4 LT |
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 | ||
5911ce0d | 220 | static int |
1da177e4 LT |
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, buffer_write, 0); | |
233 | ether3_writebuffer(dev, buffer, TX_END); | |
234 | ether3_setbuffer(dev, buffer_write, RX_START); | |
235 | ether3_writebuffer(dev, buffer + RX_START, RX_LEN); | |
236 | memset(buffer, byte ^ 0xff, RX_END); | |
237 | ether3_setbuffer(dev, buffer_read, 0); | |
238 | ether3_readbuffer(dev, buffer, TX_END); | |
239 | ether3_setbuffer(dev, 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(buffer); | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | /* ------------------------------------------------------------------------------- */ | |
268 | ||
5911ce0d | 269 | static int ether3_init_2(struct net_device *dev) |
1da177e4 LT |
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(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((TX_END>>8) - 1, REG_BUFWIN); | |
298 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); | |
299 | ether3_outw(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, 0x5A); | |
306 | if(i) | |
307 | return i; | |
308 | i = ether3_ramtest(dev, 0x1E); | |
309 | if(i) | |
310 | return i; | |
311 | ||
312 | ether3_setbuffer(dev, buffer_write, 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 | ||
1da177e4 LT |
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(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((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(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, buffer_write, 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(write_low, REG_RECVPTR); | |
366 | ether3_outb(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(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 | { | |
1da177e4 LT |
400 | if (request_irq(dev->irq, ether3_interrupt, 0, "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(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(0x80, REG_CONFIG2 + 4); | |
425 | ether3_outw(0, REG_COMMAND); | |
426 | ||
427 | free_irq(dev->irq, dev); | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
1da177e4 LT |
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; | |
4cd24eaf | 445 | } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) { |
1da177e4 LT |
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) | |
454 | { | |
455 | unsigned long flags; | |
456 | ||
457 | del_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, 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; | |
bb2537f1 | 472 | dev->stats.tx_errors += 1; |
1da177e4 LT |
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 | */ | |
72b46279 | 482 | static netdev_tx_t |
1da177e4 LT |
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); | |
bb2537f1 | 491 | dev->stats.tx_dropped++; |
1da177e4 | 492 | netif_start_queue(dev); |
6ed10654 | 493 | return NETDEV_TX_OK; |
1da177e4 LT |
494 | } |
495 | ||
496 | length = (length + 1) & ~1; | |
497 | if (length != skb->len) { | |
5b057c6b | 498 | if (skb_padto(skb, length)) |
1da177e4 LT |
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); | |
5b548140 | 508 | return NETDEV_TX_BUSY; /* unable to queue */ |
1da177e4 LT |
509 | } |
510 | ||
1da177e4 LT |
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, buffer_write, next_ptr); | |
518 | ether3_writelong(dev, 0); | |
519 | ether3_setbuffer(dev, buffer_write, 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, buffer_write, 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(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: | |
6ed10654 | 543 | return NETDEV_TX_OK; |
1da177e4 LT |
544 | } |
545 | ||
546 | static irqreturn_t | |
7d12e780 | 547 | ether3_interrupt(int irq, void *dev_id) |
1da177e4 LT |
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, 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, buffer_read, 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, buffer_read, this_ptr); | |
610 | ether3_readbuffer(dev, addrs+2, 12); | |
611 | ||
612 | if (next_ptr < RX_START || next_ptr >= RX_END) { | |
613 | int i; | |
614 | printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); | |
615 | printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); | |
616 | for (i = 2; i < 14; i++) | |
617 | printk("%02X ", addrs[i]); | |
618 | printk("\n"); | |
619 | next_ptr = priv(dev)->rx_head; | |
620 | break; | |
621 | } | |
622 | /* | |
623 | * ignore our own packets... | |
624 | */ | |
625 | if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && | |
626 | !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { | |
627 | maxcnt ++; /* compensate for loopedback packet */ | |
628 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
629 | } else | |
630 | if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { | |
631 | unsigned int length = next_ptr - this_ptr; | |
632 | struct sk_buff *skb; | |
633 | ||
634 | if (next_ptr <= this_ptr) | |
635 | length += RX_END - RX_START; | |
636 | ||
dae2e9f4 | 637 | skb = netdev_alloc_skb(dev, length + 2); |
1da177e4 LT |
638 | if (skb) { |
639 | unsigned char *buf; | |
640 | ||
1da177e4 LT |
641 | skb_reserve(skb, 2); |
642 | buf = skb_put(skb, length); | |
643 | ether3_readbuffer(dev, buf + 12, length - 12); | |
644 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
645 | *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); | |
646 | *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); | |
647 | *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); | |
648 | *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); | |
649 | skb->protocol = eth_type_trans(skb, dev); | |
650 | netif_rx(skb); | |
651 | received ++; | |
720a43ef JP |
652 | } else { |
653 | ether3_outw(next_ptr >> 8, REG_RECVEND); | |
654 | dev->stats.rx_dropped++; | |
655 | goto done; | |
656 | } | |
1da177e4 | 657 | } else { |
bb2537f1 | 658 | struct net_device_stats *stats = &dev->stats; |
1da177e4 LT |
659 | ether3_outw(next_ptr >> 8, REG_RECVEND); |
660 | if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; | |
661 | if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; | |
662 | if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; | |
663 | if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; | |
664 | stats->rx_errors++; | |
665 | } | |
666 | } | |
667 | while (-- maxcnt); | |
668 | ||
669 | done: | |
bb2537f1 | 670 | dev->stats.rx_packets += received; |
1da177e4 LT |
671 | priv(dev)->rx_head = next_ptr; |
672 | /* | |
673 | * If rx went off line, then that means that the buffer may be full. We | |
674 | * have dropped at least one packet. | |
675 | */ | |
676 | if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { | |
bb2537f1 | 677 | dev->stats.rx_dropped++; |
1da177e4 LT |
678 | ether3_outw(next_ptr, REG_RECVPTR); |
679 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); | |
680 | } | |
681 | ||
682 | return maxcnt; | |
1da177e4 LT |
683 | } |
684 | ||
685 | /* | |
686 | * Update stats for the transmitted packet(s) | |
687 | */ | |
688 | static void ether3_tx(struct net_device *dev) | |
689 | { | |
690 | unsigned int tx_tail = priv(dev)->tx_tail; | |
691 | int max_work = 14; | |
692 | ||
693 | do { | |
694 | unsigned long status; | |
695 | ||
696 | /* | |
697 | * Read the packet header | |
698 | */ | |
699 | ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); | |
700 | status = ether3_readlong(dev); | |
701 | ||
702 | /* | |
703 | * Check to see if this packet has been transmitted | |
704 | */ | |
705 | if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != | |
706 | (TXSTAT_DONE | TXHDR_TRANSMIT)) | |
707 | break; | |
708 | ||
709 | /* | |
710 | * Update errors | |
711 | */ | |
712 | if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) | |
bb2537f1 | 713 | dev->stats.tx_packets++; |
1da177e4 | 714 | else { |
bb2537f1 | 715 | dev->stats.tx_errors++; |
1da177e4 | 716 | if (status & TXSTAT_16COLLISIONS) |
bb2537f1 | 717 | dev->stats.collisions += 16; |
1da177e4 | 718 | if (status & TXSTAT_BABBLED) |
bb2537f1 | 719 | dev->stats.tx_fifo_errors++; |
1da177e4 LT |
720 | } |
721 | ||
722 | tx_tail = (tx_tail + 1) & 15; | |
723 | } while (--max_work); | |
724 | ||
725 | if (priv(dev)->tx_tail != tx_tail) { | |
726 | priv(dev)->tx_tail = tx_tail; | |
727 | netif_wake_queue(dev); | |
728 | } | |
729 | } | |
730 | ||
5911ce0d | 731 | static void ether3_banner(void) |
1da177e4 LT |
732 | { |
733 | static unsigned version_printed = 0; | |
734 | ||
735 | if (net_debug && version_printed++ == 0) | |
736 | printk(KERN_INFO "%s", version); | |
737 | } | |
738 | ||
fe146be6 AB |
739 | static const struct net_device_ops ether3_netdev_ops = { |
740 | .ndo_open = ether3_open, | |
741 | .ndo_stop = ether3_close, | |
742 | .ndo_start_xmit = ether3_sendpacket, | |
afc4b13d | 743 | .ndo_set_rx_mode = ether3_setmulticastlist, |
fe146be6 AB |
744 | .ndo_tx_timeout = ether3_timeout, |
745 | .ndo_validate_addr = eth_validate_addr, | |
fe146be6 AB |
746 | .ndo_set_mac_address = eth_mac_addr, |
747 | }; | |
748 | ||
5911ce0d | 749 | static int |
1da177e4 LT |
750 | ether3_probe(struct expansion_card *ec, const struct ecard_id *id) |
751 | { | |
752 | const struct ether3_data *data = id->data; | |
753 | struct net_device *dev; | |
0795af57 | 754 | int bus_type, ret; |
1da177e4 LT |
755 | |
756 | ether3_banner(); | |
757 | ||
758 | ret = ecard_request_resources(ec); | |
759 | if (ret) | |
760 | goto out; | |
761 | ||
762 | dev = alloc_etherdev(sizeof(struct dev_priv)); | |
763 | if (!dev) { | |
764 | ret = -ENOMEM; | |
765 | goto release; | |
766 | } | |
767 | ||
1da177e4 LT |
768 | SET_NETDEV_DEV(dev, &ec->dev); |
769 | ||
10bdaaa0 | 770 | priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); |
1da177e4 LT |
771 | if (!priv(dev)->base) { |
772 | ret = -ENOMEM; | |
773 | goto free; | |
774 | } | |
775 | ||
776 | ec->irqaddr = priv(dev)->base + data->base_offset; | |
777 | ec->irqmask = 0xf0; | |
778 | ||
779 | priv(dev)->seeq = priv(dev)->base + data->base_offset; | |
780 | dev->irq = ec->irq; | |
781 | ||
782 | ether3_addr(dev->dev_addr, ec); | |
783 | ||
6fd9c53f KC |
784 | priv(dev)->dev = dev; |
785 | timer_setup(&priv(dev)->timer, ether3_ledoff, 0); | |
1da177e4 LT |
786 | |
787 | /* Reset card... | |
788 | */ | |
789 | ether3_outb(0x80, REG_CONFIG2 + 4); | |
790 | bus_type = BUS_UNKNOWN; | |
791 | udelay(4); | |
792 | ||
793 | /* Test using Receive Pointer (16-bit register) to find out | |
794 | * how the ether3 is connected to the bus... | |
795 | */ | |
796 | if (ether3_probe_bus_8(dev, 0x100) && | |
797 | ether3_probe_bus_8(dev, 0x201)) | |
798 | bus_type = BUS_8; | |
799 | ||
800 | if (bus_type == BUS_UNKNOWN && | |
801 | ether3_probe_bus_16(dev, 0x101) && | |
802 | ether3_probe_bus_16(dev, 0x201)) | |
803 | bus_type = BUS_16; | |
804 | ||
805 | switch (bus_type) { | |
806 | case BUS_UNKNOWN: | |
807 | printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); | |
808 | ret = -ENODEV; | |
809 | goto free; | |
810 | ||
811 | case BUS_8: | |
812 | printk(KERN_ERR "%s: %s found, but is an unsupported " | |
813 | "8-bit card\n", dev->name, data->name); | |
814 | ret = -ENODEV; | |
815 | goto free; | |
816 | ||
817 | default: | |
818 | break; | |
819 | } | |
820 | ||
821 | if (ether3_init_2(dev)) { | |
822 | ret = -ENODEV; | |
823 | goto free; | |
824 | } | |
825 | ||
fe146be6 | 826 | dev->netdev_ops = ðer3_netdev_ops; |
1da177e4 LT |
827 | dev->watchdog_timeo = 5 * HZ / 100; |
828 | ||
829 | ret = register_netdev(dev); | |
830 | if (ret) | |
831 | goto free; | |
832 | ||
e174961c JB |
833 | printk("%s: %s in slot %d, %pM\n", |
834 | dev->name, data->name, ec->slot_no, dev->dev_addr); | |
1da177e4 LT |
835 | |
836 | ecard_set_drvdata(ec, dev); | |
837 | return 0; | |
838 | ||
839 | free: | |
1da177e4 LT |
840 | free_netdev(dev); |
841 | release: | |
842 | ecard_release_resources(ec); | |
843 | out: | |
844 | return ret; | |
845 | } | |
846 | ||
5911ce0d | 847 | static void ether3_remove(struct expansion_card *ec) |
1da177e4 LT |
848 | { |
849 | struct net_device *dev = ecard_get_drvdata(ec); | |
850 | ||
851 | ecard_set_drvdata(ec, NULL); | |
852 | ||
853 | unregister_netdev(dev); | |
1da177e4 LT |
854 | free_netdev(dev); |
855 | ecard_release_resources(ec); | |
856 | } | |
857 | ||
858 | static struct ether3_data ether3 = { | |
859 | .name = "ether3", | |
860 | .base_offset = 0, | |
861 | }; | |
862 | ||
863 | static struct ether3_data etherb = { | |
864 | .name = "etherb", | |
865 | .base_offset = 0x800, | |
866 | }; | |
867 | ||
868 | static const struct ecard_id ether3_ids[] = { | |
869 | { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, | |
870 | { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, | |
871 | { MANU_ANT, PROD_ANT_ETHERB, ðerb }, | |
872 | { 0xffff, 0xffff } | |
873 | }; | |
874 | ||
875 | static struct ecard_driver ether3_driver = { | |
876 | .probe = ether3_probe, | |
5911ce0d | 877 | .remove = ether3_remove, |
1da177e4 LT |
878 | .id_table = ether3_ids, |
879 | .drv = { | |
880 | .name = "ether3", | |
881 | }, | |
882 | }; | |
883 | ||
884 | static int __init ether3_init(void) | |
885 | { | |
886 | return ecard_register_driver(ðer3_driver); | |
887 | } | |
888 | ||
889 | static void __exit ether3_exit(void) | |
890 | { | |
891 | ecard_remove_driver(ðer3_driver); | |
892 | } | |
893 | ||
894 | module_init(ether3_init); | |
895 | module_exit(ether3_exit); | |
896 | ||
897 | MODULE_LICENSE("GPL"); |