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1da177e4 LT |
1 | /* ne-h8300.c: A NE2000 clone on H8/300 driver for linux. */ |
2 | /* | |
3 | original ne.c | |
4 | Written 1992-94 by Donald Becker. | |
5 | ||
6 | Copyright 1993 United States Government as represented by the | |
7 | Director, National Security Agency. | |
8 | ||
9 | This software may be used and distributed according to the terms | |
10 | of the GNU General Public License, incorporated herein by reference. | |
11 | ||
12 | The author may be reached as becker@scyld.com, or C/O | |
13 | Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 | |
14 | ||
15 | H8/300 modified | |
16 | Yoshinori Sato <ysato@users.sourceforge.jp> | |
17 | */ | |
18 | ||
19 | static const char version1[] = | |
20 | "ne-h8300.c:v1.00 2004/04/11 ysato\n"; | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/etherdevice.h> | |
30 | ||
31 | #include <asm/system.h> | |
32 | #include <asm/io.h> | |
33 | #include <asm/irq.h> | |
34 | ||
35 | #include "8390.h" | |
36 | ||
37 | #define DRV_NAME "ne-h8300" | |
38 | ||
39 | /* Some defines that people can play with if so inclined. */ | |
40 | ||
41 | /* Do we perform extra sanity checks on stuff ? */ | |
42 | /* #define NE_SANITY_CHECK */ | |
43 | ||
44 | /* Do we implement the read before write bugfix ? */ | |
45 | /* #define NE_RW_BUGFIX */ | |
46 | ||
47 | /* Do we have a non std. amount of memory? (in units of 256 byte pages) */ | |
48 | /* #define PACKETBUF_MEMSIZE 0x40 */ | |
49 | ||
50 | /* A zero-terminated list of I/O addresses to be probed at boot. */ | |
51 | ||
52 | /* ---- No user-serviceable parts below ---- */ | |
53 | ||
54 | #define NE_BASE (dev->base_addr) | |
55 | #define NE_CMD 0x00 | |
56 | #define NE_DATAPORT (ei_status.word16?0x20:0x10) /* NatSemi-defined port window offset. */ | |
57 | #define NE_RESET (ei_status.word16?0x3f:0x1f) /* Issue a read to reset, a write to clear. */ | |
58 | #define NE_IO_EXTENT (ei_status.word16?0x40:0x20) | |
59 | ||
60 | #define NESM_START_PG 0x40 /* First page of TX buffer */ | |
61 | #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ | |
62 | ||
63 | static int ne_probe1(struct net_device *dev, int ioaddr); | |
64 | ||
65 | static int ne_open(struct net_device *dev); | |
66 | static int ne_close(struct net_device *dev); | |
67 | ||
68 | static void ne_reset_8390(struct net_device *dev); | |
69 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, | |
70 | int ring_page); | |
71 | static void ne_block_input(struct net_device *dev, int count, | |
72 | struct sk_buff *skb, int ring_offset); | |
73 | static void ne_block_output(struct net_device *dev, const int count, | |
74 | const unsigned char *buf, const int start_page); | |
75 | ||
76 | ||
77 | static u32 reg_offset[16]; | |
78 | ||
79 | static int __init init_reg_offset(struct net_device *dev,unsigned long base_addr) | |
80 | { | |
81 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
82 | int i; | |
83 | unsigned char bus_width; | |
84 | ||
85 | bus_width = *(volatile unsigned char *)ABWCR; | |
86 | bus_width &= 1 << ((base_addr >> 21) & 7); | |
87 | ||
88 | for (i = 0; i < sizeof(reg_offset) / sizeof(u32); i++) | |
89 | if (bus_width == 0) | |
90 | reg_offset[i] = i * 2 + 1; | |
91 | else | |
92 | reg_offset[i] = i; | |
93 | ||
94 | ei_local->reg_offset = reg_offset; | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static int __initdata h8300_ne_count = 0; | |
99 | #ifdef CONFIG_H8300H_H8MAX | |
100 | static unsigned long __initdata h8300_ne_base[] = { 0x800600 }; | |
101 | static int h8300_ne_irq[] = {EXT_IRQ4}; | |
102 | #endif | |
103 | #ifdef CONFIG_H8300H_AKI3068NET | |
104 | static unsigned long __initdata h8300_ne_base[] = { 0x200000 }; | |
105 | static int h8300_ne_irq[] = {EXT_IRQ5}; | |
106 | #endif | |
107 | ||
108 | static inline int init_dev(struct net_device *dev) | |
109 | { | |
110 | if (h8300_ne_count < (sizeof(h8300_ne_base) / sizeof(unsigned long))) { | |
111 | dev->base_addr = h8300_ne_base[h8300_ne_count]; | |
112 | dev->irq = h8300_ne_irq[h8300_ne_count]; | |
113 | h8300_ne_count++; | |
114 | return 0; | |
115 | } else | |
116 | return -ENODEV; | |
117 | } | |
118 | ||
119 | /* Probe for various non-shared-memory ethercards. | |
120 | ||
121 | NEx000-clone boards have a Station Address PROM (SAPROM) in the packet | |
122 | buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of | |
123 | the SAPROM, while other supposed NE2000 clones must be detected by their | |
124 | SA prefix. | |
125 | ||
126 | Reading the SAPROM from a word-wide card with the 8390 set in byte-wide | |
127 | mode results in doubled values, which can be detected and compensated for. | |
128 | ||
129 | The probe is also responsible for initializing the card and filling | |
130 | in the 'dev' and 'ei_status' structures. | |
131 | ||
132 | We use the minimum memory size for some ethercard product lines, iff we can't | |
133 | distinguish models. You can increase the packet buffer size by setting | |
134 | PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are: | |
135 | E1010 starts at 0x100 and ends at 0x2000. | |
136 | E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory") | |
137 | E2010 starts at 0x100 and ends at 0x4000. | |
138 | E2010-x starts at 0x100 and ends at 0xffff. */ | |
139 | ||
140 | static int __init do_ne_probe(struct net_device *dev) | |
141 | { | |
142 | unsigned int base_addr = dev->base_addr; | |
143 | ||
144 | SET_MODULE_OWNER(dev); | |
145 | ||
146 | /* First check any supplied i/o locations. User knows best. <cough> */ | |
147 | if (base_addr > 0x1ff) /* Check a single specified location. */ | |
148 | return ne_probe1(dev, base_addr); | |
149 | else if (base_addr != 0) /* Don't probe at all. */ | |
150 | return -ENXIO; | |
151 | ||
152 | return -ENODEV; | |
153 | } | |
154 | ||
155 | static void cleanup_card(struct net_device *dev) | |
156 | { | |
157 | free_irq(dev->irq, dev); | |
158 | release_region(dev->base_addr, NE_IO_EXTENT); | |
159 | } | |
160 | ||
161 | #ifndef MODULE | |
162 | struct net_device * __init ne_probe(int unit) | |
163 | { | |
164 | struct net_device *dev = alloc_ei_netdev(); | |
165 | int err; | |
166 | ||
167 | if (!dev) | |
168 | return ERR_PTR(-ENOMEM); | |
169 | ||
170 | if (init_dev(dev)) | |
171 | return ERR_PTR(-ENODEV); | |
172 | ||
173 | sprintf(dev->name, "eth%d", unit); | |
174 | netdev_boot_setup_check(dev); | |
175 | ||
176 | err = init_reg_offset(dev, dev->base_addr); | |
177 | if (err) | |
178 | goto out; | |
179 | ||
180 | err = do_ne_probe(dev); | |
181 | if (err) | |
182 | goto out; | |
1da177e4 | 183 | return dev; |
1da177e4 LT |
184 | out: |
185 | free_netdev(dev); | |
186 | return ERR_PTR(err); | |
187 | } | |
188 | #endif | |
189 | ||
190 | static int __init ne_probe1(struct net_device *dev, int ioaddr) | |
191 | { | |
192 | int i; | |
193 | unsigned char SA_prom[16]; | |
194 | int wordlength = 2; | |
195 | const char *name = NULL; | |
196 | int start_page, stop_page; | |
197 | int reg0, ret; | |
198 | static unsigned version_printed; | |
199 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
200 | unsigned char bus_width; | |
201 | ||
202 | if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME)) | |
203 | return -EBUSY; | |
204 | ||
205 | reg0 = inb_p(ioaddr); | |
206 | if (reg0 == 0xFF) { | |
207 | ret = -ENODEV; | |
208 | goto err_out; | |
209 | } | |
210 | ||
211 | /* Do a preliminary verification that we have a 8390. */ | |
212 | { | |
213 | int regd; | |
214 | outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD); | |
215 | regd = inb_p(ioaddr + EI_SHIFT(0x0d)); | |
216 | outb_p(0xff, ioaddr + EI_SHIFT(0x0d)); | |
217 | outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD); | |
218 | inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */ | |
219 | if (inb_p(ioaddr + EN0_COUNTER0) != 0) { | |
220 | outb_p(reg0, ioaddr + EI_SHIFT(0)); | |
221 | outb_p(regd, ioaddr + EI_SHIFT(0x0d)); /* Restore the old values. */ | |
222 | ret = -ENODEV; | |
223 | goto err_out; | |
224 | } | |
225 | } | |
226 | ||
227 | if (ei_debug && version_printed++ == 0) | |
228 | printk(KERN_INFO "%s", version1); | |
229 | ||
230 | printk(KERN_INFO "NE*000 ethercard probe at %08x:", ioaddr); | |
231 | ||
232 | /* Read the 16 bytes of station address PROM. | |
233 | We must first initialize registers, similar to NS8390_init(eifdev, 0). | |
234 | We can't reliably read the SAPROM address without this. | |
235 | (I learned the hard way!). */ | |
236 | { | |
237 | struct {unsigned char value, offset; } program_seq[] = | |
238 | { | |
239 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ | |
240 | {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */ | |
241 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ | |
242 | {0x00, EN0_RCNTHI}, | |
243 | {0x00, EN0_IMR}, /* Mask completion irq. */ | |
244 | {0xFF, EN0_ISR}, | |
245 | {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */ | |
246 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ | |
247 | {32, EN0_RCNTLO}, | |
248 | {0x00, EN0_RCNTHI}, | |
249 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */ | |
250 | {0x00, EN0_RSARHI}, | |
251 | {E8390_RREAD+E8390_START, E8390_CMD}, | |
252 | }; | |
253 | ||
254 | for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) | |
255 | outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); | |
256 | ||
257 | } | |
258 | bus_width = *(volatile unsigned char *)ABWCR; | |
259 | bus_width &= 1 << ((ioaddr >> 21) & 7); | |
260 | ei_status.word16 = (bus_width == 0); /* temporary setting */ | |
261 | for(i = 0; i < 16 /*sizeof(SA_prom)*/; i++) { | |
262 | SA_prom[i] = inb_p(ioaddr + NE_DATAPORT); | |
263 | inb_p(ioaddr + NE_DATAPORT); /* dummy read */ | |
264 | } | |
265 | ||
266 | start_page = NESM_START_PG; | |
267 | stop_page = NESM_STOP_PG; | |
268 | ||
269 | if (bus_width) | |
270 | wordlength = 1; | |
271 | else | |
272 | outb_p(0x49, ioaddr + EN0_DCFG); | |
273 | ||
274 | /* Set up the rest of the parameters. */ | |
275 | name = (wordlength == 2) ? "NE2000" : "NE1000"; | |
276 | ||
277 | if (! dev->irq) { | |
278 | printk(" failed to detect IRQ line.\n"); | |
279 | ret = -EAGAIN; | |
280 | goto err_out; | |
281 | } | |
282 | ||
283 | /* Snarf the interrupt now. There's no point in waiting since we cannot | |
284 | share and the board will usually be enabled. */ | |
285 | ret = request_irq(dev->irq, ei_interrupt, 0, name, dev); | |
286 | if (ret) { | |
287 | printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret); | |
288 | goto err_out; | |
289 | } | |
290 | ||
291 | dev->base_addr = ioaddr; | |
292 | ||
293 | for(i = 0; i < ETHER_ADDR_LEN; i++) { | |
294 | printk(" %2.2x", SA_prom[i]); | |
295 | dev->dev_addr[i] = SA_prom[i]; | |
296 | } | |
297 | ||
298 | printk("\n%s: %s found at %#x, using IRQ %d.\n", | |
299 | dev->name, name, ioaddr, dev->irq); | |
300 | ||
301 | ei_status.name = name; | |
302 | ei_status.tx_start_page = start_page; | |
303 | ei_status.stop_page = stop_page; | |
304 | ei_status.word16 = (wordlength == 2); | |
305 | ||
306 | ei_status.rx_start_page = start_page + TX_PAGES; | |
307 | #ifdef PACKETBUF_MEMSIZE | |
308 | /* Allow the packet buffer size to be overridden by know-it-alls. */ | |
309 | ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE; | |
310 | #endif | |
311 | ||
312 | ei_status.reset_8390 = &ne_reset_8390; | |
313 | ei_status.block_input = &ne_block_input; | |
314 | ei_status.block_output = &ne_block_output; | |
315 | ei_status.get_8390_hdr = &ne_get_8390_hdr; | |
316 | ei_status.priv = 0; | |
317 | dev->open = &ne_open; | |
318 | dev->stop = &ne_close; | |
319 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
320 | dev->poll_controller = ei_poll; | |
321 | #endif | |
322 | NS8390_init(dev, 0); | |
1da177e4 | 323 | |
b1fc5505 | 324 | ret = register_netdev(dev); |
325 | if (ret) | |
326 | goto out_irq; | |
327 | return 0; | |
328 | out_irq: | |
329 | free_irq(dev->irq, dev); | |
1da177e4 LT |
330 | err_out: |
331 | release_region(ioaddr, NE_IO_EXTENT); | |
332 | return ret; | |
333 | } | |
334 | ||
335 | static int ne_open(struct net_device *dev) | |
336 | { | |
337 | ei_open(dev); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int ne_close(struct net_device *dev) | |
342 | { | |
343 | if (ei_debug > 1) | |
344 | printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name); | |
345 | ei_close(dev); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | /* Hard reset the card. This used to pause for the same period that a | |
350 | 8390 reset command required, but that shouldn't be necessary. */ | |
351 | ||
352 | static void ne_reset_8390(struct net_device *dev) | |
353 | { | |
354 | unsigned long reset_start_time = jiffies; | |
355 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
356 | ||
357 | if (ei_debug > 1) | |
358 | printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies); | |
359 | ||
360 | /* DON'T change these to inb_p/outb_p or reset will fail on clones. */ | |
361 | outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); | |
362 | ||
363 | ei_status.txing = 0; | |
364 | ei_status.dmaing = 0; | |
365 | ||
366 | /* This check _should_not_ be necessary, omit eventually. */ | |
367 | while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) | |
368 | if (jiffies - reset_start_time > 2*HZ/100) { | |
369 | printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name); | |
370 | break; | |
371 | } | |
372 | outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */ | |
373 | } | |
374 | ||
375 | /* Grab the 8390 specific header. Similar to the block_input routine, but | |
376 | we don't need to be concerned with ring wrap as the header will be at | |
377 | the start of a page, so we optimize accordingly. */ | |
378 | ||
379 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) | |
380 | { | |
381 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
382 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ | |
383 | ||
384 | if (ei_status.dmaing) | |
385 | { | |
386 | printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr " | |
387 | "[DMAstat:%d][irqlock:%d].\n", | |
388 | dev->name, ei_status.dmaing, ei_status.irqlock); | |
389 | return; | |
390 | } | |
391 | ||
392 | ei_status.dmaing |= 0x01; | |
393 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); | |
394 | outb_p(sizeof(struct e8390_pkt_hdr), NE_BASE + EN0_RCNTLO); | |
395 | outb_p(0, NE_BASE + EN0_RCNTHI); | |
396 | outb_p(0, NE_BASE + EN0_RSARLO); /* On page boundary */ | |
397 | outb_p(ring_page, NE_BASE + EN0_RSARHI); | |
398 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); | |
399 | ||
400 | if (ei_status.word16) { | |
401 | int len; | |
402 | unsigned short *p = (unsigned short *)hdr; | |
403 | for (len = sizeof(struct e8390_pkt_hdr)>>1; len > 0; len--) | |
404 | *p++ = inw(NE_BASE + NE_DATAPORT); | |
405 | } else | |
406 | insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)); | |
407 | ||
408 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ | |
409 | ei_status.dmaing &= ~0x01; | |
410 | ||
411 | le16_to_cpus(&hdr->count); | |
412 | } | |
413 | ||
414 | /* Block input and output, similar to the Crynwr packet driver. If you | |
415 | are porting to a new ethercard, look at the packet driver source for hints. | |
416 | The NEx000 doesn't share the on-board packet memory -- you have to put | |
417 | the packet out through the "remote DMA" dataport using outb. */ | |
418 | ||
419 | static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
420 | { | |
421 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
422 | #ifdef NE_SANITY_CHECK | |
423 | int xfer_count = count; | |
424 | #endif | |
425 | char *buf = skb->data; | |
426 | ||
427 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ | |
428 | if (ei_status.dmaing) | |
429 | { | |
430 | printk(KERN_EMERG "%s: DMAing conflict in ne_block_input " | |
431 | "[DMAstat:%d][irqlock:%d].\n", | |
432 | dev->name, ei_status.dmaing, ei_status.irqlock); | |
433 | return; | |
434 | } | |
435 | ei_status.dmaing |= 0x01; | |
436 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); | |
437 | outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); | |
438 | outb_p(count >> 8, NE_BASE + EN0_RCNTHI); | |
439 | outb_p(ring_offset & 0xff, NE_BASE + EN0_RSARLO); | |
440 | outb_p(ring_offset >> 8, NE_BASE + EN0_RSARHI); | |
441 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); | |
442 | if (ei_status.word16) | |
443 | { | |
444 | int len; | |
445 | unsigned short *p = (unsigned short *)buf; | |
446 | for (len = count>>1; len > 0; len--) | |
447 | *p++ = inw(NE_BASE + NE_DATAPORT); | |
448 | if (count & 0x01) | |
449 | { | |
450 | buf[count-1] = inb(NE_BASE + NE_DATAPORT); | |
451 | #ifdef NE_SANITY_CHECK | |
452 | xfer_count++; | |
453 | #endif | |
454 | } | |
455 | } else { | |
456 | insb(NE_BASE + NE_DATAPORT, buf, count); | |
457 | } | |
458 | ||
459 | #ifdef NE_SANITY_CHECK | |
460 | /* This was for the ALPHA version only, but enough people have | |
461 | been encountering problems so it is still here. If you see | |
462 | this message you either 1) have a slightly incompatible clone | |
463 | or 2) have noise/speed problems with your bus. */ | |
464 | ||
465 | if (ei_debug > 1) | |
466 | { | |
467 | /* DMA termination address check... */ | |
468 | int addr, tries = 20; | |
469 | do { | |
470 | /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here | |
471 | -- it's broken for Rx on some cards! */ | |
472 | int high = inb_p(NE_BASE + EN0_RSARHI); | |
473 | int low = inb_p(NE_BASE + EN0_RSARLO); | |
474 | addr = (high << 8) + low; | |
475 | if (((ring_offset + xfer_count) & 0xff) == low) | |
476 | break; | |
477 | } while (--tries > 0); | |
478 | if (tries <= 0) | |
479 | printk(KERN_WARNING "%s: RX transfer address mismatch," | |
480 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | |
481 | dev->name, ring_offset + xfer_count, addr); | |
482 | } | |
483 | #endif | |
484 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ | |
485 | ei_status.dmaing &= ~0x01; | |
486 | } | |
487 | ||
488 | static void ne_block_output(struct net_device *dev, int count, | |
489 | const unsigned char *buf, const int start_page) | |
490 | { | |
491 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); | |
492 | unsigned long dma_start; | |
493 | #ifdef NE_SANITY_CHECK | |
494 | int retries = 0; | |
495 | #endif | |
496 | ||
497 | /* Round the count up for word writes. Do we need to do this? | |
498 | What effect will an odd byte count have on the 8390? | |
499 | I should check someday. */ | |
500 | ||
501 | if (ei_status.word16 && (count & 0x01)) | |
502 | count++; | |
503 | ||
504 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ | |
505 | if (ei_status.dmaing) | |
506 | { | |
507 | printk(KERN_EMERG "%s: DMAing conflict in ne_block_output." | |
508 | "[DMAstat:%d][irqlock:%d]\n", | |
509 | dev->name, ei_status.dmaing, ei_status.irqlock); | |
510 | return; | |
511 | } | |
512 | ei_status.dmaing |= 0x01; | |
513 | /* We should already be in page 0, but to be safe... */ | |
514 | outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, NE_BASE + NE_CMD); | |
515 | ||
516 | #ifdef NE_SANITY_CHECK | |
517 | retry: | |
518 | #endif | |
519 | ||
520 | #ifdef NE8390_RW_BUGFIX | |
521 | /* Handle the read-before-write bug the same way as the | |
522 | Crynwr packet driver -- the NatSemi method doesn't work. | |
523 | Actually this doesn't always work either, but if you have | |
524 | problems with your NEx000 this is better than nothing! */ | |
525 | ||
526 | outb_p(0x42, NE_BASE + EN0_RCNTLO); | |
527 | outb_p(0x00, NE_BASE + EN0_RCNTHI); | |
528 | outb_p(0x42, NE_BASE + EN0_RSARLO); | |
529 | outb_p(0x00, NE_BASE + EN0_RSARHI); | |
530 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); | |
531 | /* Make certain that the dummy read has occurred. */ | |
532 | udelay(6); | |
533 | #endif | |
534 | ||
535 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); | |
536 | ||
537 | /* Now the normal output. */ | |
538 | outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); | |
539 | outb_p(count >> 8, NE_BASE + EN0_RCNTHI); | |
540 | outb_p(0x00, NE_BASE + EN0_RSARLO); | |
541 | outb_p(start_page, NE_BASE + EN0_RSARHI); | |
542 | ||
543 | outb_p(E8390_RWRITE+E8390_START, NE_BASE + NE_CMD); | |
544 | if (ei_status.word16) { | |
545 | int len; | |
546 | unsigned short *p = (unsigned short *)buf; | |
547 | for (len = count>>1; len > 0; len--) | |
548 | outw(*p++, NE_BASE + NE_DATAPORT); | |
549 | } else { | |
550 | outsb(NE_BASE + NE_DATAPORT, buf, count); | |
551 | } | |
552 | ||
553 | dma_start = jiffies; | |
554 | ||
555 | #ifdef NE_SANITY_CHECK | |
556 | /* This was for the ALPHA version only, but enough people have | |
557 | been encountering problems so it is still here. */ | |
558 | ||
559 | if (ei_debug > 1) | |
560 | { | |
561 | /* DMA termination address check... */ | |
562 | int addr, tries = 20; | |
563 | do { | |
564 | int high = inb_p(NE_BASE + EN0_RSARHI); | |
565 | int low = inb_p(NE_BASE + EN0_RSARLO); | |
566 | addr = (high << 8) + low; | |
567 | if ((start_page << 8) + count == addr) | |
568 | break; | |
569 | } while (--tries > 0); | |
570 | ||
571 | if (tries <= 0) | |
572 | { | |
573 | printk(KERN_WARNING "%s: Tx packet transfer address mismatch," | |
574 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | |
575 | dev->name, (start_page << 8) + count, addr); | |
576 | if (retries++ == 0) | |
577 | goto retry; | |
578 | } | |
579 | } | |
580 | #endif | |
581 | ||
582 | while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0) | |
583 | if (jiffies - dma_start > 2*HZ/100) { /* 20ms */ | |
584 | printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name); | |
585 | ne_reset_8390(dev); | |
586 | NS8390_init(dev,1); | |
587 | break; | |
588 | } | |
589 | ||
590 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ | |
591 | ei_status.dmaing &= ~0x01; | |
592 | return; | |
593 | } | |
594 | ||
595 | \f | |
596 | #ifdef MODULE | |
597 | #define MAX_NE_CARDS 1 /* Max number of NE cards per module */ | |
598 | static struct net_device *dev_ne[MAX_NE_CARDS]; | |
599 | static int io[MAX_NE_CARDS]; | |
600 | static int irq[MAX_NE_CARDS]; | |
601 | static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */ | |
602 | ||
603 | MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); | |
604 | MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); | |
605 | MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); | |
606 | MODULE_PARM_DESC(io, "I/O base address(es)"); | |
607 | MODULE_PARM_DESC(irq, "IRQ number(s)"); | |
608 | MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver"); | |
609 | MODULE_LICENSE("GPL"); | |
610 | ||
611 | /* This is set up so that no ISA autoprobe takes place. We can't guarantee | |
612 | that the ne2k probe is the last 8390 based probe to take place (as it | |
613 | is at boot) and so the probe will get confused by any other 8390 cards. | |
614 | ISA device autoprobes on a running machine are not recommended anyway. */ | |
615 | ||
616 | int init_module(void) | |
617 | { | |
618 | int this_dev, found = 0; | |
619 | int err; | |
620 | ||
621 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { | |
622 | struct net_device *dev = alloc_ei_netdev(); | |
623 | if (!dev) | |
624 | break; | |
625 | if (io[this_dev]) { | |
626 | dev->irq = irq[this_dev]; | |
627 | dev->mem_end = bad[this_dev]; | |
628 | dev->base_addr = io[this_dev]; | |
629 | } else { | |
630 | dev->base_addr = h8300_ne_base[this_dev]; | |
631 | dev->irq = h8300_ne_irq[this_dev]; | |
632 | } | |
633 | err = init_reg_offset(dev, dev->base_addr); | |
634 | if (!err) { | |
635 | if (do_ne_probe(dev) == 0) { | |
b1fc5505 | 636 | dev_ne[found++] = dev; |
637 | continue; | |
1da177e4 LT |
638 | } |
639 | } | |
640 | free_netdev(dev); | |
641 | if (found) | |
642 | break; | |
643 | if (io[this_dev] != 0) | |
644 | printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", dev->base_addr); | |
645 | else | |
646 | printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n"); | |
647 | return -ENXIO; | |
648 | } | |
649 | if (found) | |
650 | return 0; | |
651 | return -ENODEV; | |
652 | } | |
653 | ||
654 | void cleanup_module(void) | |
655 | { | |
656 | int this_dev; | |
657 | ||
658 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { | |
659 | struct net_device *dev = dev_ne[this_dev]; | |
660 | if (dev) { | |
661 | unregister_netdev(dev); | |
662 | cleanup_card(dev); | |
663 | free_netdev(dev); | |
664 | } | |
665 | } | |
666 | } | |
667 | #endif /* MODULE */ |