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1da177e4 LT |
1 | /* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */ |
2 | /* | |
3 | Written 1992-94 by Donald Becker. | |
4 | ||
5 | Copyright 1993 United States Government as represented by the | |
6 | Director, National Security Agency. This software may be used and | |
7 | distributed according to the terms of the GNU General Public License, | |
8 | incorporated herein by reference. | |
9 | ||
10 | The author may be reached as becker@scyld.com, or C/O | |
11 | Scyld Computing Corporation | |
12 | 410 Severn Ave., Suite 210 | |
13 | Annapolis MD 21403 | |
14 | ||
15 | ||
16 | This driver should work with the 3c503 and 3c503/16. It should be used | |
17 | in shared memory mode for best performance, although it may also work | |
18 | in programmed-I/O mode. | |
19 | ||
20 | Sources: | |
21 | EtherLink II Technical Reference Manual, | |
22 | EtherLink II/16 Technical Reference Manual Supplement, | |
23 | 3Com Corporation, 5400 Bayfront Plaza, Santa Clara CA 95052-8145 | |
24 | ||
25 | The Crynwr 3c503 packet driver. | |
26 | ||
27 | Changelog: | |
28 | ||
29 | Paul Gortmaker : add support for the 2nd 8kB of RAM on 16 bit cards. | |
30 | Paul Gortmaker : multiple card support for module users. | |
31 | rjohnson@analogic.com : Fix up PIO interface for efficient operation. | |
32 | Jeff Garzik : ethtool support | |
33 | ||
34 | */ | |
35 | ||
36 | #define DRV_NAME "3c503" | |
37 | #define DRV_VERSION "1.10a" | |
38 | #define DRV_RELDATE "11/17/2001" | |
39 | ||
40 | ||
41 | static const char version[] = | |
42 | DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n"; | |
43 | ||
44 | #include <linux/module.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/errno.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/netdevice.h> | |
50 | #include <linux/etherdevice.h> | |
51 | #include <linux/init.h> | |
52 | #include <linux/ethtool.h> | |
53 | ||
54 | #include <asm/uaccess.h> | |
55 | #include <asm/io.h> | |
56 | #include <asm/system.h> | |
57 | #include <asm/byteorder.h> | |
58 | ||
59 | #include "8390.h" | |
60 | #include "3c503.h" | |
61 | #define WRD_COUNT 4 | |
62 | ||
63 | static int el2_pio_probe(struct net_device *dev); | |
64 | static int el2_probe1(struct net_device *dev, int ioaddr); | |
65 | ||
66 | /* A zero-terminated list of I/O addresses to be probed in PIO mode. */ | |
67 | static unsigned int netcard_portlist[] __initdata = | |
68 | { 0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0}; | |
69 | ||
70 | #define EL2_IO_EXTENT 16 | |
71 | ||
72 | static int el2_open(struct net_device *dev); | |
73 | static int el2_close(struct net_device *dev); | |
74 | static void el2_reset_8390(struct net_device *dev); | |
75 | static void el2_init_card(struct net_device *dev); | |
76 | static void el2_block_output(struct net_device *dev, int count, | |
77 | const unsigned char *buf, int start_page); | |
78 | static void el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, | |
79 | int ring_offset); | |
80 | static void el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, | |
81 | int ring_page); | |
82 | static struct ethtool_ops netdev_ethtool_ops; | |
83 | ||
84 | \f | |
85 | /* This routine probes for a memory-mapped 3c503 board by looking for | |
86 | the "location register" at the end of the jumpered boot PROM space. | |
87 | This works even if a PROM isn't there. | |
88 | ||
89 | If the ethercard isn't found there is an optional probe for | |
90 | ethercard jumpered to programmed-I/O mode. | |
91 | */ | |
92 | static int __init do_el2_probe(struct net_device *dev) | |
93 | { | |
94 | int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0}; | |
95 | int base_addr = dev->base_addr; | |
96 | int irq = dev->irq; | |
97 | ||
98 | SET_MODULE_OWNER(dev); | |
99 | ||
100 | if (base_addr > 0x1ff) /* Check a single specified location. */ | |
101 | return el2_probe1(dev, base_addr); | |
102 | else if (base_addr != 0) /* Don't probe at all. */ | |
103 | return -ENXIO; | |
104 | ||
105 | for (addr = addrs; *addr; addr++) { | |
106 | void __iomem *p = ioremap(*addr, 1); | |
107 | unsigned base_bits; | |
108 | int i; | |
109 | ||
110 | if (!p) | |
111 | continue; | |
112 | base_bits = readb(p); | |
113 | iounmap(p); | |
114 | i = ffs(base_bits) - 1; | |
115 | if (i == -1 || base_bits != (1 << i)) | |
116 | continue; | |
117 | if (el2_probe1(dev, netcard_portlist[i]) == 0) | |
118 | return 0; | |
119 | dev->irq = irq; | |
120 | } | |
121 | #if ! defined(no_probe_nonshared_memory) | |
122 | return el2_pio_probe(dev); | |
123 | #else | |
124 | return -ENODEV; | |
125 | #endif | |
126 | } | |
127 | ||
128 | /* Try all of the locations that aren't obviously empty. This touches | |
129 | a lot of locations, and is much riskier than the code above. */ | |
130 | static int __init | |
131 | el2_pio_probe(struct net_device *dev) | |
132 | { | |
133 | int i; | |
134 | int base_addr = dev->base_addr; | |
135 | int irq = dev->irq; | |
136 | ||
137 | if (base_addr > 0x1ff) /* Check a single specified location. */ | |
138 | return el2_probe1(dev, base_addr); | |
139 | else if (base_addr != 0) /* Don't probe at all. */ | |
140 | return -ENXIO; | |
141 | ||
142 | for (i = 0; netcard_portlist[i]; i++) { | |
143 | if (el2_probe1(dev, netcard_portlist[i]) == 0) | |
144 | return 0; | |
145 | dev->irq = irq; | |
146 | } | |
147 | ||
148 | return -ENODEV; | |
149 | } | |
150 | ||
151 | static void cleanup_card(struct net_device *dev) | |
152 | { | |
153 | /* NB: el2_close() handles free_irq */ | |
154 | release_region(dev->base_addr, EL2_IO_EXTENT); | |
155 | if (ei_status.mem) | |
156 | iounmap(ei_status.mem); | |
157 | } | |
158 | ||
159 | #ifndef MODULE | |
160 | struct net_device * __init el2_probe(int unit) | |
161 | { | |
162 | struct net_device *dev = alloc_ei_netdev(); | |
163 | int err; | |
164 | ||
165 | if (!dev) | |
166 | return ERR_PTR(-ENOMEM); | |
167 | ||
168 | sprintf(dev->name, "eth%d", unit); | |
169 | netdev_boot_setup_check(dev); | |
170 | ||
171 | err = do_el2_probe(dev); | |
172 | if (err) | |
173 | goto out; | |
1da177e4 | 174 | return dev; |
1da177e4 LT |
175 | out: |
176 | free_netdev(dev); | |
177 | return ERR_PTR(err); | |
178 | } | |
179 | #endif | |
180 | ||
181 | /* Probe for the Etherlink II card at I/O port base IOADDR, | |
182 | returning non-zero on success. If found, set the station | |
183 | address and memory parameters in DEVICE. */ | |
184 | static int __init | |
185 | el2_probe1(struct net_device *dev, int ioaddr) | |
186 | { | |
187 | int i, iobase_reg, membase_reg, saved_406, wordlength, retval; | |
188 | static unsigned version_printed; | |
189 | unsigned long vendor_id; | |
190 | ||
191 | if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME)) | |
192 | return -EBUSY; | |
193 | ||
194 | if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) { | |
195 | retval = -EBUSY; | |
196 | goto out; | |
197 | } | |
198 | ||
199 | /* Reset and/or avoid any lurking NE2000 */ | |
200 | if (inb(ioaddr + 0x408) == 0xff) { | |
201 | mdelay(1); | |
202 | retval = -ENODEV; | |
203 | goto out1; | |
204 | } | |
205 | ||
206 | /* We verify that it's a 3C503 board by checking the first three octets | |
207 | of its ethernet address. */ | |
208 | iobase_reg = inb(ioaddr+0x403); | |
209 | membase_reg = inb(ioaddr+0x404); | |
210 | /* ASIC location registers should be 0 or have only a single bit set. */ | |
211 | if ( (iobase_reg & (iobase_reg - 1)) | |
212 | || (membase_reg & (membase_reg - 1))) { | |
213 | retval = -ENODEV; | |
214 | goto out1; | |
215 | } | |
216 | saved_406 = inb_p(ioaddr + 0x406); | |
217 | outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */ | |
218 | outb_p(ECNTRL_THIN, ioaddr + 0x406); | |
219 | /* Map the station addr PROM into the lower I/O ports. We now check | |
220 | for both the old and new 3Com prefix */ | |
221 | outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406); | |
222 | vendor_id = inb(ioaddr)*0x10000 + inb(ioaddr + 1)*0x100 + inb(ioaddr + 2); | |
223 | if ((vendor_id != OLD_3COM_ID) && (vendor_id != NEW_3COM_ID)) { | |
224 | /* Restore the register we frobbed. */ | |
225 | outb(saved_406, ioaddr + 0x406); | |
226 | retval = -ENODEV; | |
227 | goto out1; | |
228 | } | |
229 | ||
230 | if (ei_debug && version_printed++ == 0) | |
231 | printk(version); | |
232 | ||
233 | dev->base_addr = ioaddr; | |
234 | ||
235 | printk("%s: 3c503 at i/o base %#3x, node ", dev->name, ioaddr); | |
236 | ||
237 | /* Retrieve and print the ethernet address. */ | |
238 | for (i = 0; i < 6; i++) | |
239 | printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i)); | |
240 | ||
241 | /* Map the 8390 back into the window. */ | |
242 | outb(ECNTRL_THIN, ioaddr + 0x406); | |
243 | ||
244 | /* Check for EL2/16 as described in tech. man. */ | |
245 | outb_p(E8390_PAGE0, ioaddr + E8390_CMD); | |
246 | outb_p(0, ioaddr + EN0_DCFG); | |
247 | outb_p(E8390_PAGE2, ioaddr + E8390_CMD); | |
248 | wordlength = inb_p(ioaddr + EN0_DCFG) & ENDCFG_WTS; | |
249 | outb_p(E8390_PAGE0, ioaddr + E8390_CMD); | |
250 | ||
251 | /* Probe for, turn on and clear the board's shared memory. */ | |
252 | if (ei_debug > 2) printk(" memory jumpers %2.2x ", membase_reg); | |
253 | outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */ | |
254 | ||
255 | /* This should be probed for (or set via an ioctl()) at run-time. | |
256 | Right now we use a sleazy hack to pass in the interface number | |
257 | at boot-time via the low bits of the mem_end field. That value is | |
258 | unused, and the low bits would be discarded even if it was used. */ | |
259 | #if defined(EI8390_THICK) || defined(EL2_AUI) | |
260 | ei_status.interface_num = 1; | |
261 | #else | |
262 | ei_status.interface_num = dev->mem_end & 0xf; | |
263 | #endif | |
264 | printk(", using %sternal xcvr.\n", ei_status.interface_num == 0 ? "in" : "ex"); | |
265 | ||
266 | if ((membase_reg & 0xf0) == 0) { | |
267 | dev->mem_start = 0; | |
268 | ei_status.name = "3c503-PIO"; | |
269 | ei_status.mem = NULL; | |
270 | } else { | |
271 | dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) + | |
272 | ((membase_reg & 0xA0) ? 0x4000 : 0); | |
273 | #define EL2_MEMSIZE (EL2_MB1_STOP_PG - EL2_MB1_START_PG)*256 | |
274 | ei_status.mem = ioremap(dev->mem_start, EL2_MEMSIZE); | |
275 | ||
276 | #ifdef EL2MEMTEST | |
277 | /* This has never found an error, but someone might care. | |
278 | Note that it only tests the 2nd 8kB on 16kB 3c503/16 | |
279 | cards between card addr. 0x2000 and 0x3fff. */ | |
280 | { /* Check the card's memory. */ | |
281 | void __iomem *mem_base = ei_status.mem; | |
282 | unsigned int test_val = 0xbbadf00d; | |
283 | writel(0xba5eba5e, mem_base); | |
284 | for (i = sizeof(test_val); i < EL2_MEMSIZE; i+=sizeof(test_val)) { | |
285 | writel(test_val, mem_base + i); | |
286 | if (readl(mem_base) != 0xba5eba5e | |
287 | || readl(mem_base + i) != test_val) { | |
288 | printk("3c503: memory failure or memory address conflict.\n"); | |
289 | dev->mem_start = 0; | |
290 | ei_status.name = "3c503-PIO"; | |
291 | iounmap(mem_base); | |
292 | ei_status.mem = NULL; | |
293 | break; | |
294 | } | |
295 | test_val += 0x55555555; | |
296 | writel(0, mem_base + i); | |
297 | } | |
298 | } | |
299 | #endif /* EL2MEMTEST */ | |
300 | ||
301 | if (dev->mem_start) | |
302 | dev->mem_end = dev->mem_start + EL2_MEMSIZE; | |
303 | ||
304 | if (wordlength) { /* No Tx pages to skip over to get to Rx */ | |
305 | ei_status.priv = 0; | |
306 | ei_status.name = "3c503/16"; | |
307 | } else { | |
308 | ei_status.priv = TX_PAGES * 256; | |
309 | ei_status.name = "3c503"; | |
310 | } | |
311 | } | |
312 | ||
313 | /* | |
314 | Divide up the memory on the card. This is the same regardless of | |
315 | whether shared-mem or PIO is used. For 16 bit cards (16kB RAM), | |
316 | we use the entire 8k of bank1 for an Rx ring. We only use 3k | |
317 | of the bank0 for 2 full size Tx packet slots. For 8 bit cards, | |
318 | (8kB RAM) we use 3kB of bank1 for two Tx slots, and the remaining | |
319 | 5kB for an Rx ring. */ | |
320 | ||
321 | if (wordlength) { | |
322 | ei_status.tx_start_page = EL2_MB0_START_PG; | |
323 | ei_status.rx_start_page = EL2_MB1_START_PG; | |
324 | } else { | |
325 | ei_status.tx_start_page = EL2_MB1_START_PG; | |
326 | ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; | |
327 | } | |
328 | ||
329 | /* Finish setting the board's parameters. */ | |
330 | ei_status.stop_page = EL2_MB1_STOP_PG; | |
331 | ei_status.word16 = wordlength; | |
332 | ei_status.reset_8390 = &el2_reset_8390; | |
333 | ei_status.get_8390_hdr = &el2_get_8390_hdr; | |
334 | ei_status.block_input = &el2_block_input; | |
335 | ei_status.block_output = &el2_block_output; | |
336 | ||
337 | if (dev->irq == 2) | |
338 | dev->irq = 9; | |
339 | else if (dev->irq > 5 && dev->irq != 9) { | |
340 | printk("3c503: configured interrupt %d invalid, will use autoIRQ.\n", | |
341 | dev->irq); | |
342 | dev->irq = 0; | |
343 | } | |
344 | ||
345 | ei_status.saved_irq = dev->irq; | |
346 | ||
347 | dev->open = &el2_open; | |
348 | dev->stop = &el2_close; | |
349 | dev->ethtool_ops = &netdev_ethtool_ops; | |
350 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
351 | dev->poll_controller = ei_poll; | |
352 | #endif | |
353 | ||
b1fc5505 HX |
354 | retval = register_netdev(dev); |
355 | if (retval) | |
356 | goto out1; | |
357 | ||
1da177e4 LT |
358 | if (dev->mem_start) |
359 | printk("%s: %s - %dkB RAM, 8kB shared mem window at %#6lx-%#6lx.\n", | |
360 | dev->name, ei_status.name, (wordlength+1)<<3, | |
361 | dev->mem_start, dev->mem_end-1); | |
362 | ||
363 | else | |
364 | { | |
365 | ei_status.tx_start_page = EL2_MB1_START_PG; | |
366 | ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; | |
367 | printk("\n%s: %s, %dkB RAM, using programmed I/O (REJUMPER for SHARED MEMORY).\n", | |
368 | dev->name, ei_status.name, (wordlength+1)<<3); | |
369 | } | |
370 | release_region(ioaddr + 0x400, 8); | |
371 | return 0; | |
372 | out1: | |
373 | release_region(ioaddr + 0x400, 8); | |
374 | out: | |
375 | release_region(ioaddr, EL2_IO_EXTENT); | |
376 | return retval; | |
377 | } | |
378 | \f | |
379 | static int | |
380 | el2_open(struct net_device *dev) | |
381 | { | |
382 | int retval = -EAGAIN; | |
383 | ||
384 | if (dev->irq < 2) { | |
385 | int irqlist[] = {5, 9, 3, 4, 0}; | |
386 | int *irqp = irqlist; | |
387 | ||
388 | outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */ | |
389 | do { | |
390 | if (request_irq (*irqp, NULL, 0, "bogus", dev) != -EBUSY) { | |
391 | /* Twinkle the interrupt, and check if it's seen. */ | |
392 | unsigned long cookie = probe_irq_on(); | |
393 | outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR); | |
394 | outb_p(0x00, E33G_IDCFR); | |
395 | if (*irqp == probe_irq_off(cookie) /* It's a good IRQ line! */ | |
396 | && ((retval = request_irq(dev->irq = *irqp, | |
397 | ei_interrupt, 0, dev->name, dev)) == 0)) | |
398 | break; | |
399 | } | |
400 | } while (*++irqp); | |
401 | if (*irqp == 0) { | |
402 | outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ | |
403 | return retval; | |
404 | } | |
405 | } else { | |
406 | if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))) { | |
407 | return retval; | |
408 | } | |
409 | } | |
410 | ||
411 | el2_init_card(dev); | |
412 | ei_open(dev); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | static int | |
417 | el2_close(struct net_device *dev) | |
418 | { | |
419 | free_irq(dev->irq, dev); | |
420 | dev->irq = ei_status.saved_irq; | |
421 | outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ | |
422 | ||
423 | ei_close(dev); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | /* This is called whenever we have a unrecoverable failure: | |
428 | transmit timeout | |
429 | Bad ring buffer packet header | |
430 | */ | |
431 | static void | |
432 | el2_reset_8390(struct net_device *dev) | |
433 | { | |
434 | if (ei_debug > 1) { | |
435 | printk("%s: Resetting the 3c503 board...", dev->name); | |
436 | printk("%#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR), | |
437 | E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR)); | |
438 | } | |
439 | outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL); | |
440 | ei_status.txing = 0; | |
441 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
442 | el2_init_card(dev); | |
443 | if (ei_debug > 1) printk("done\n"); | |
444 | } | |
445 | ||
446 | /* Initialize the 3c503 GA registers after a reset. */ | |
447 | static void | |
448 | el2_init_card(struct net_device *dev) | |
449 | { | |
450 | /* Unmap the station PROM and select the DIX or BNC connector. */ | |
451 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
452 | ||
453 | /* Set ASIC copy of rx's first and last+1 buffer pages */ | |
454 | /* These must be the same as in the 8390. */ | |
455 | outb(ei_status.rx_start_page, E33G_STARTPG); | |
456 | outb(ei_status.stop_page, E33G_STOPPG); | |
457 | ||
458 | /* Point the vector pointer registers somewhere ?harmless?. */ | |
459 | outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */ | |
460 | outb(0xff, E33G_VP1); | |
461 | outb(0x00, E33G_VP0); | |
462 | /* Turn off all interrupts until we're opened. */ | |
463 | outb_p(0x00, dev->base_addr + EN0_IMR); | |
464 | /* Enable IRQs iff started. */ | |
465 | outb(EGACFR_NORM, E33G_GACFR); | |
466 | ||
467 | /* Set the interrupt line. */ | |
468 | outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR); | |
469 | outb_p((WRD_COUNT << 1), E33G_DRQCNT); /* Set burst size to 8 */ | |
470 | outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */ | |
471 | outb_p(0x00, E33G_DMAAL); | |
472 | return; /* We always succeed */ | |
473 | } | |
474 | ||
475 | /* | |
476 | * Either use the shared memory (if enabled on the board) or put the packet | |
477 | * out through the ASIC FIFO. | |
478 | */ | |
479 | static void | |
480 | el2_block_output(struct net_device *dev, int count, | |
481 | const unsigned char *buf, int start_page) | |
482 | { | |
483 | unsigned short int *wrd; | |
484 | int boguscount; /* timeout counter */ | |
485 | unsigned short word; /* temporary for better machine code */ | |
486 | void __iomem *base = ei_status.mem; | |
487 | ||
488 | if (ei_status.word16) /* Tx packets go into bank 0 on EL2/16 card */ | |
489 | outb(EGACFR_RSEL|EGACFR_TCM, E33G_GACFR); | |
490 | else | |
491 | outb(EGACFR_NORM, E33G_GACFR); | |
492 | ||
493 | if (base) { /* Shared memory transfer */ | |
494 | memcpy_toio(base + ((start_page - ei_status.tx_start_page) << 8), | |
495 | buf, count); | |
496 | outb(EGACFR_NORM, E33G_GACFR); /* Back to bank1 in case on bank0 */ | |
497 | return; | |
498 | } | |
499 | ||
500 | /* | |
501 | * No shared memory, put the packet out the other way. | |
502 | * Set up then start the internal memory transfer to Tx Start Page | |
503 | */ | |
504 | ||
505 | word = (unsigned short)start_page; | |
506 | outb(word&0xFF, E33G_DMAAH); | |
507 | outb(word>>8, E33G_DMAAL); | |
508 | ||
509 | outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT | |
510 | | ECNTRL_START, E33G_CNTRL); | |
511 | ||
512 | /* | |
513 | * Here I am going to write data to the FIFO as quickly as possible. | |
514 | * Note that E33G_FIFOH is defined incorrectly. It is really | |
515 | * E33G_FIFOL, the lowest port address for both the byte and | |
516 | * word write. Variable 'count' is NOT checked. Caller must supply a | |
517 | * valid count. Note that I may write a harmless extra byte to the | |
518 | * 8390 if the byte-count was not even. | |
519 | */ | |
520 | wrd = (unsigned short int *) buf; | |
521 | count = (count + 1) >> 1; | |
522 | for(;;) | |
523 | { | |
524 | boguscount = 0x1000; | |
525 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
526 | { | |
527 | if(!boguscount--) | |
528 | { | |
529 | printk("%s: FIFO blocked in el2_block_output.\n", dev->name); | |
530 | el2_reset_8390(dev); | |
531 | goto blocked; | |
532 | } | |
533 | } | |
534 | if(count > WRD_COUNT) | |
535 | { | |
536 | outsw(E33G_FIFOH, wrd, WRD_COUNT); | |
537 | wrd += WRD_COUNT; | |
538 | count -= WRD_COUNT; | |
539 | } | |
540 | else | |
541 | { | |
542 | outsw(E33G_FIFOH, wrd, count); | |
543 | break; | |
544 | } | |
545 | } | |
546 | blocked:; | |
547 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
548 | return; | |
549 | } | |
550 | ||
551 | /* Read the 4 byte, page aligned 8390 specific header. */ | |
552 | static void | |
553 | el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) | |
554 | { | |
555 | int boguscount; | |
556 | void __iomem *base = ei_status.mem; | |
557 | unsigned short word; | |
558 | ||
559 | if (base) { /* Use the shared memory. */ | |
560 | void __iomem *hdr_start = base + ((ring_page - EL2_MB1_START_PG)<<8); | |
561 | memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); | |
562 | hdr->count = le16_to_cpu(hdr->count); | |
563 | return; | |
564 | } | |
565 | ||
566 | /* | |
567 | * No shared memory, use programmed I/O. | |
568 | */ | |
569 | ||
570 | word = (unsigned short)ring_page; | |
571 | outb(word&0xFF, E33G_DMAAH); | |
572 | outb(word>>8, E33G_DMAAL); | |
573 | ||
574 | outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT | |
575 | | ECNTRL_START, E33G_CNTRL); | |
576 | boguscount = 0x1000; | |
577 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
578 | { | |
579 | if(!boguscount--) | |
580 | { | |
581 | printk("%s: FIFO blocked in el2_get_8390_hdr.\n", dev->name); | |
582 | memset(hdr, 0x00, sizeof(struct e8390_pkt_hdr)); | |
583 | el2_reset_8390(dev); | |
584 | goto blocked; | |
585 | } | |
586 | } | |
587 | insw(E33G_FIFOH, hdr, (sizeof(struct e8390_pkt_hdr))>> 1); | |
588 | blocked:; | |
589 | outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
590 | } | |
591 | ||
592 | ||
593 | static void | |
594 | el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
595 | { | |
596 | int boguscount = 0; | |
597 | void __iomem *base = ei_status.mem; | |
598 | unsigned short int *buf; | |
599 | unsigned short word; | |
600 | ||
601 | /* Maybe enable shared memory just be to be safe... nahh.*/ | |
602 | if (base) { /* Use the shared memory. */ | |
603 | ring_offset -= (EL2_MB1_START_PG<<8); | |
604 | if (ring_offset + count > EL2_MEMSIZE) { | |
605 | /* We must wrap the input move. */ | |
606 | int semi_count = EL2_MEMSIZE - ring_offset; | |
607 | memcpy_fromio(skb->data, base + ring_offset, semi_count); | |
608 | count -= semi_count; | |
609 | memcpy_fromio(skb->data + semi_count, base + ei_status.priv, count); | |
610 | } else { | |
611 | /* Packet is in one chunk -- we can copy + cksum. */ | |
612 | eth_io_copy_and_sum(skb, base + ring_offset, count, 0); | |
613 | } | |
614 | return; | |
615 | } | |
616 | ||
617 | /* | |
618 | * No shared memory, use programmed I/O. | |
619 | */ | |
620 | word = (unsigned short) ring_offset; | |
621 | outb(word>>8, E33G_DMAAH); | |
622 | outb(word&0xFF, E33G_DMAAL); | |
623 | ||
624 | outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT | |
625 | | ECNTRL_START, E33G_CNTRL); | |
626 | ||
627 | /* | |
628 | * Here I also try to get data as fast as possible. I am betting that I | |
629 | * can read one extra byte without clobbering anything in the kernel because | |
630 | * this would only occur on an odd byte-count and allocation of skb->data | |
631 | * is word-aligned. Variable 'count' is NOT checked. Caller must check | |
632 | * for a valid count. | |
633 | * [This is currently quite safe.... but if one day the 3c503 explodes | |
634 | * you know where to come looking ;)] | |
635 | */ | |
636 | ||
637 | buf = (unsigned short int *) skb->data; | |
638 | count = (count + 1) >> 1; | |
639 | for(;;) | |
640 | { | |
641 | boguscount = 0x1000; | |
642 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
643 | { | |
644 | if(!boguscount--) | |
645 | { | |
646 | printk("%s: FIFO blocked in el2_block_input.\n", dev->name); | |
647 | el2_reset_8390(dev); | |
648 | goto blocked; | |
649 | } | |
650 | } | |
651 | if(count > WRD_COUNT) | |
652 | { | |
653 | insw(E33G_FIFOH, buf, WRD_COUNT); | |
654 | buf += WRD_COUNT; | |
655 | count -= WRD_COUNT; | |
656 | } | |
657 | else | |
658 | { | |
659 | insw(E33G_FIFOH, buf, count); | |
660 | break; | |
661 | } | |
662 | } | |
663 | blocked:; | |
664 | outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
665 | return; | |
666 | } | |
667 | ||
668 | ||
669 | static void netdev_get_drvinfo(struct net_device *dev, | |
670 | struct ethtool_drvinfo *info) | |
671 | { | |
672 | strcpy(info->driver, DRV_NAME); | |
673 | strcpy(info->version, DRV_VERSION); | |
674 | sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); | |
675 | } | |
676 | ||
677 | static struct ethtool_ops netdev_ethtool_ops = { | |
678 | .get_drvinfo = netdev_get_drvinfo, | |
679 | }; | |
680 | ||
681 | #ifdef MODULE | |
682 | #define MAX_EL2_CARDS 4 /* Max number of EL2 cards per module */ | |
683 | ||
684 | static struct net_device *dev_el2[MAX_EL2_CARDS]; | |
685 | static int io[MAX_EL2_CARDS]; | |
686 | static int irq[MAX_EL2_CARDS]; | |
687 | static int xcvr[MAX_EL2_CARDS]; /* choose int. or ext. xcvr */ | |
688 | module_param_array(io, int, NULL, 0); | |
689 | module_param_array(irq, int, NULL, 0); | |
690 | module_param_array(xcvr, int, NULL, 0); | |
691 | MODULE_PARM_DESC(io, "I/O base address(es)"); | |
692 | MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); | |
693 | MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)"); | |
694 | MODULE_DESCRIPTION("3Com ISA EtherLink II, II/16 (3c503, 3c503/16) driver"); | |
695 | MODULE_LICENSE("GPL"); | |
696 | ||
697 | /* This is set up so that only a single autoprobe takes place per call. | |
698 | ISA device autoprobes on a running machine are not recommended. */ | |
699 | int | |
700 | init_module(void) | |
701 | { | |
702 | struct net_device *dev; | |
703 | int this_dev, found = 0; | |
704 | ||
705 | for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { | |
706 | if (io[this_dev] == 0) { | |
707 | if (this_dev != 0) break; /* only autoprobe 1st one */ | |
708 | printk(KERN_NOTICE "3c503.c: Presently autoprobing (not recommended) for a single card.\n"); | |
709 | } | |
710 | dev = alloc_ei_netdev(); | |
711 | if (!dev) | |
712 | break; | |
713 | dev->irq = irq[this_dev]; | |
714 | dev->base_addr = io[this_dev]; | |
715 | dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */ | |
716 | if (do_el2_probe(dev) == 0) { | |
b1fc5505 HX |
717 | dev_el2[found++] = dev; |
718 | continue; | |
1da177e4 LT |
719 | } |
720 | free_netdev(dev); | |
721 | printk(KERN_WARNING "3c503.c: No 3c503 card found (i/o = 0x%x).\n", io[this_dev]); | |
722 | break; | |
723 | } | |
724 | if (found) | |
725 | return 0; | |
726 | return -ENXIO; | |
727 | } | |
728 | ||
729 | void | |
730 | cleanup_module(void) | |
731 | { | |
732 | int this_dev; | |
733 | ||
734 | for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { | |
735 | struct net_device *dev = dev_el2[this_dev]; | |
736 | if (dev) { | |
737 | unregister_netdev(dev); | |
738 | cleanup_card(dev); | |
739 | free_netdev(dev); | |
740 | } | |
741 | } | |
742 | } | |
743 | #endif /* MODULE */ |