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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> | |
a6b7a407 | 52 | #include <linux/interrupt.h> |
1da177e4 LT |
53 | #include <linux/ethtool.h> |
54 | ||
55 | #include <asm/uaccess.h> | |
56 | #include <asm/io.h> | |
1da177e4 LT |
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); | |
7282d491 | 82 | static const struct ethtool_ops netdev_ethtool_ops; |
1da177e4 | 83 | |
6aa20a22 | 84 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
98 | if (base_addr > 0x1ff) /* Check a single specified location. */ |
99 | return el2_probe1(dev, base_addr); | |
100 | else if (base_addr != 0) /* Don't probe at all. */ | |
101 | return -ENXIO; | |
102 | ||
103 | for (addr = addrs; *addr; addr++) { | |
104 | void __iomem *p = ioremap(*addr, 1); | |
105 | unsigned base_bits; | |
106 | int i; | |
107 | ||
108 | if (!p) | |
109 | continue; | |
110 | base_bits = readb(p); | |
111 | iounmap(p); | |
112 | i = ffs(base_bits) - 1; | |
113 | if (i == -1 || base_bits != (1 << i)) | |
114 | continue; | |
115 | if (el2_probe1(dev, netcard_portlist[i]) == 0) | |
116 | return 0; | |
117 | dev->irq = irq; | |
118 | } | |
119 | #if ! defined(no_probe_nonshared_memory) | |
120 | return el2_pio_probe(dev); | |
121 | #else | |
122 | return -ENODEV; | |
123 | #endif | |
124 | } | |
125 | ||
126 | /* Try all of the locations that aren't obviously empty. This touches | |
127 | a lot of locations, and is much riskier than the code above. */ | |
6aa20a22 | 128 | static int __init |
1da177e4 LT |
129 | el2_pio_probe(struct net_device *dev) |
130 | { | |
131 | int i; | |
132 | int base_addr = dev->base_addr; | |
133 | int irq = dev->irq; | |
134 | ||
135 | if (base_addr > 0x1ff) /* Check a single specified location. */ | |
136 | return el2_probe1(dev, base_addr); | |
137 | else if (base_addr != 0) /* Don't probe at all. */ | |
138 | return -ENXIO; | |
139 | ||
140 | for (i = 0; netcard_portlist[i]; i++) { | |
141 | if (el2_probe1(dev, netcard_portlist[i]) == 0) | |
142 | return 0; | |
143 | dev->irq = irq; | |
144 | } | |
145 | ||
146 | return -ENODEV; | |
147 | } | |
148 | ||
1da177e4 LT |
149 | #ifndef MODULE |
150 | struct net_device * __init el2_probe(int unit) | |
151 | { | |
055e5110 | 152 | struct net_device *dev = alloc_eip_netdev(); |
1da177e4 LT |
153 | int err; |
154 | ||
155 | if (!dev) | |
156 | return ERR_PTR(-ENOMEM); | |
157 | ||
158 | sprintf(dev->name, "eth%d", unit); | |
159 | netdev_boot_setup_check(dev); | |
160 | ||
161 | err = do_el2_probe(dev); | |
162 | if (err) | |
163 | goto out; | |
1da177e4 | 164 | return dev; |
1da177e4 LT |
165 | out: |
166 | free_netdev(dev); | |
167 | return ERR_PTR(err); | |
168 | } | |
169 | #endif | |
170 | ||
53cdd289 SH |
171 | static const struct net_device_ops el2_netdev_ops = { |
172 | .ndo_open = el2_open, | |
173 | .ndo_stop = el2_close, | |
174 | ||
175 | .ndo_start_xmit = eip_start_xmit, | |
176 | .ndo_tx_timeout = eip_tx_timeout, | |
177 | .ndo_get_stats = eip_get_stats, | |
afc4b13d | 178 | .ndo_set_rx_mode = eip_set_multicast_list, |
53cdd289 | 179 | .ndo_validate_addr = eth_validate_addr, |
fe96aaa1 | 180 | .ndo_set_mac_address = eth_mac_addr, |
53cdd289 SH |
181 | .ndo_change_mtu = eth_change_mtu, |
182 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
183 | .ndo_poll_controller = eip_poll, | |
184 | #endif | |
185 | }; | |
186 | ||
1da177e4 LT |
187 | /* Probe for the Etherlink II card at I/O port base IOADDR, |
188 | returning non-zero on success. If found, set the station | |
189 | address and memory parameters in DEVICE. */ | |
6aa20a22 | 190 | static int __init |
1da177e4 LT |
191 | el2_probe1(struct net_device *dev, int ioaddr) |
192 | { | |
193 | int i, iobase_reg, membase_reg, saved_406, wordlength, retval; | |
194 | static unsigned version_printed; | |
195 | unsigned long vendor_id; | |
196 | ||
197 | if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME)) | |
198 | return -EBUSY; | |
199 | ||
200 | if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) { | |
201 | retval = -EBUSY; | |
202 | goto out; | |
203 | } | |
204 | ||
205 | /* Reset and/or avoid any lurking NE2000 */ | |
206 | if (inb(ioaddr + 0x408) == 0xff) { | |
207 | mdelay(1); | |
208 | retval = -ENODEV; | |
209 | goto out1; | |
210 | } | |
211 | ||
212 | /* We verify that it's a 3C503 board by checking the first three octets | |
213 | of its ethernet address. */ | |
214 | iobase_reg = inb(ioaddr+0x403); | |
215 | membase_reg = inb(ioaddr+0x404); | |
216 | /* ASIC location registers should be 0 or have only a single bit set. */ | |
8e95a202 JP |
217 | if ((iobase_reg & (iobase_reg - 1)) || |
218 | (membase_reg & (membase_reg - 1))) { | |
1da177e4 LT |
219 | retval = -ENODEV; |
220 | goto out1; | |
221 | } | |
222 | saved_406 = inb_p(ioaddr + 0x406); | |
223 | outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */ | |
224 | outb_p(ECNTRL_THIN, ioaddr + 0x406); | |
225 | /* Map the station addr PROM into the lower I/O ports. We now check | |
226 | for both the old and new 3Com prefix */ | |
227 | outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406); | |
228 | vendor_id = inb(ioaddr)*0x10000 + inb(ioaddr + 1)*0x100 + inb(ioaddr + 2); | |
229 | if ((vendor_id != OLD_3COM_ID) && (vendor_id != NEW_3COM_ID)) { | |
230 | /* Restore the register we frobbed. */ | |
231 | outb(saved_406, ioaddr + 0x406); | |
232 | retval = -ENODEV; | |
233 | goto out1; | |
234 | } | |
235 | ||
236 | if (ei_debug && version_printed++ == 0) | |
646cdb32 | 237 | pr_debug("%s", version); |
1da177e4 LT |
238 | |
239 | dev->base_addr = ioaddr; | |
240 | ||
646cdb32 | 241 | pr_info("%s: 3c503 at i/o base %#3x, node ", dev->name, ioaddr); |
1da177e4 LT |
242 | |
243 | /* Retrieve and print the ethernet address. */ | |
244 | for (i = 0; i < 6; i++) | |
0795af57 | 245 | dev->dev_addr[i] = inb(ioaddr + i); |
646cdb32 | 246 | pr_cont("%pM", dev->dev_addr); |
1da177e4 LT |
247 | |
248 | /* Map the 8390 back into the window. */ | |
249 | outb(ECNTRL_THIN, ioaddr + 0x406); | |
250 | ||
251 | /* Check for EL2/16 as described in tech. man. */ | |
252 | outb_p(E8390_PAGE0, ioaddr + E8390_CMD); | |
253 | outb_p(0, ioaddr + EN0_DCFG); | |
254 | outb_p(E8390_PAGE2, ioaddr + E8390_CMD); | |
255 | wordlength = inb_p(ioaddr + EN0_DCFG) & ENDCFG_WTS; | |
256 | outb_p(E8390_PAGE0, ioaddr + E8390_CMD); | |
257 | ||
258 | /* Probe for, turn on and clear the board's shared memory. */ | |
646cdb32 AB |
259 | if (ei_debug > 2) |
260 | pr_cont(" memory jumpers %2.2x ", membase_reg); | |
1da177e4 LT |
261 | outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */ |
262 | ||
263 | /* This should be probed for (or set via an ioctl()) at run-time. | |
264 | Right now we use a sleazy hack to pass in the interface number | |
265 | at boot-time via the low bits of the mem_end field. That value is | |
266 | unused, and the low bits would be discarded even if it was used. */ | |
267 | #if defined(EI8390_THICK) || defined(EL2_AUI) | |
268 | ei_status.interface_num = 1; | |
269 | #else | |
270 | ei_status.interface_num = dev->mem_end & 0xf; | |
271 | #endif | |
646cdb32 | 272 | pr_cont(", using %sternal xcvr.\n", ei_status.interface_num == 0 ? "in" : "ex"); |
1da177e4 LT |
273 | |
274 | if ((membase_reg & 0xf0) == 0) { | |
275 | dev->mem_start = 0; | |
276 | ei_status.name = "3c503-PIO"; | |
277 | ei_status.mem = NULL; | |
278 | } else { | |
279 | dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) + | |
280 | ((membase_reg & 0xA0) ? 0x4000 : 0); | |
281 | #define EL2_MEMSIZE (EL2_MB1_STOP_PG - EL2_MB1_START_PG)*256 | |
282 | ei_status.mem = ioremap(dev->mem_start, EL2_MEMSIZE); | |
283 | ||
284 | #ifdef EL2MEMTEST | |
285 | /* This has never found an error, but someone might care. | |
286 | Note that it only tests the 2nd 8kB on 16kB 3c503/16 | |
287 | cards between card addr. 0x2000 and 0x3fff. */ | |
288 | { /* Check the card's memory. */ | |
289 | void __iomem *mem_base = ei_status.mem; | |
290 | unsigned int test_val = 0xbbadf00d; | |
291 | writel(0xba5eba5e, mem_base); | |
292 | for (i = sizeof(test_val); i < EL2_MEMSIZE; i+=sizeof(test_val)) { | |
293 | writel(test_val, mem_base + i); | |
8e95a202 JP |
294 | if (readl(mem_base) != 0xba5eba5e || |
295 | readl(mem_base + i) != test_val) { | |
646cdb32 | 296 | pr_warning("3c503: memory failure or memory address conflict.\n"); |
1da177e4 LT |
297 | dev->mem_start = 0; |
298 | ei_status.name = "3c503-PIO"; | |
299 | iounmap(mem_base); | |
300 | ei_status.mem = NULL; | |
301 | break; | |
302 | } | |
303 | test_val += 0x55555555; | |
304 | writel(0, mem_base + i); | |
305 | } | |
306 | } | |
307 | #endif /* EL2MEMTEST */ | |
308 | ||
309 | if (dev->mem_start) | |
310 | dev->mem_end = dev->mem_start + EL2_MEMSIZE; | |
311 | ||
312 | if (wordlength) { /* No Tx pages to skip over to get to Rx */ | |
313 | ei_status.priv = 0; | |
314 | ei_status.name = "3c503/16"; | |
315 | } else { | |
316 | ei_status.priv = TX_PAGES * 256; | |
317 | ei_status.name = "3c503"; | |
318 | } | |
319 | } | |
320 | ||
321 | /* | |
322 | Divide up the memory on the card. This is the same regardless of | |
323 | whether shared-mem or PIO is used. For 16 bit cards (16kB RAM), | |
324 | we use the entire 8k of bank1 for an Rx ring. We only use 3k | |
325 | of the bank0 for 2 full size Tx packet slots. For 8 bit cards, | |
326 | (8kB RAM) we use 3kB of bank1 for two Tx slots, and the remaining | |
327 | 5kB for an Rx ring. */ | |
328 | ||
329 | if (wordlength) { | |
330 | ei_status.tx_start_page = EL2_MB0_START_PG; | |
331 | ei_status.rx_start_page = EL2_MB1_START_PG; | |
332 | } else { | |
333 | ei_status.tx_start_page = EL2_MB1_START_PG; | |
334 | ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; | |
335 | } | |
336 | ||
337 | /* Finish setting the board's parameters. */ | |
338 | ei_status.stop_page = EL2_MB1_STOP_PG; | |
339 | ei_status.word16 = wordlength; | |
c061b18d JP |
340 | ei_status.reset_8390 = el2_reset_8390; |
341 | ei_status.get_8390_hdr = el2_get_8390_hdr; | |
342 | ei_status.block_input = el2_block_input; | |
343 | ei_status.block_output = el2_block_output; | |
1da177e4 LT |
344 | |
345 | if (dev->irq == 2) | |
346 | dev->irq = 9; | |
347 | else if (dev->irq > 5 && dev->irq != 9) { | |
646cdb32 | 348 | pr_warning("3c503: configured interrupt %d invalid, will use autoIRQ.\n", |
1da177e4 LT |
349 | dev->irq); |
350 | dev->irq = 0; | |
351 | } | |
352 | ||
353 | ei_status.saved_irq = dev->irq; | |
354 | ||
53cdd289 | 355 | dev->netdev_ops = &el2_netdev_ops; |
1da177e4 | 356 | dev->ethtool_ops = &netdev_ethtool_ops; |
1da177e4 | 357 | |
b1fc5505 HX |
358 | retval = register_netdev(dev); |
359 | if (retval) | |
360 | goto out1; | |
361 | ||
1da177e4 | 362 | if (dev->mem_start) |
646cdb32 | 363 | pr_info("%s: %s - %dkB RAM, 8kB shared mem window at %#6lx-%#6lx.\n", |
1da177e4 LT |
364 | dev->name, ei_status.name, (wordlength+1)<<3, |
365 | dev->mem_start, dev->mem_end-1); | |
366 | ||
367 | else | |
368 | { | |
369 | ei_status.tx_start_page = EL2_MB1_START_PG; | |
370 | ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES; | |
646cdb32 | 371 | pr_info("%s: %s, %dkB RAM, using programmed I/O (REJUMPER for SHARED MEMORY).\n", |
1da177e4 LT |
372 | dev->name, ei_status.name, (wordlength+1)<<3); |
373 | } | |
374 | release_region(ioaddr + 0x400, 8); | |
375 | return 0; | |
376 | out1: | |
377 | release_region(ioaddr + 0x400, 8); | |
378 | out: | |
379 | release_region(ioaddr, EL2_IO_EXTENT); | |
380 | return retval; | |
381 | } | |
6aa20a22 | 382 | |
b0cf4dfb BH |
383 | static irqreturn_t el2_probe_interrupt(int irq, void *seen) |
384 | { | |
385 | *(bool *)seen = true; | |
386 | return IRQ_HANDLED; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | static int |
390 | el2_open(struct net_device *dev) | |
391 | { | |
ab08999d | 392 | int retval; |
1da177e4 LT |
393 | |
394 | if (dev->irq < 2) { | |
b6bc7650 JP |
395 | static const int irqlist[] = {5, 9, 3, 4, 0}; |
396 | const int *irqp = irqlist; | |
1da177e4 LT |
397 | |
398 | outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */ | |
399 | do { | |
b0cf4dfb BH |
400 | bool seen; |
401 | ||
402 | retval = request_irq(*irqp, el2_probe_interrupt, 0, | |
403 | dev->name, &seen); | |
404 | if (retval == -EBUSY) | |
405 | continue; | |
406 | if (retval < 0) | |
407 | goto err_disable; | |
408 | ||
1da177e4 | 409 | /* Twinkle the interrupt, and check if it's seen. */ |
b0cf4dfb BH |
410 | seen = false; |
411 | smp_wmb(); | |
1da177e4 LT |
412 | outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR); |
413 | outb_p(0x00, E33G_IDCFR); | |
b0cf4dfb | 414 | msleep(1); |
1ffde03d | 415 | free_irq(*irqp, &seen); |
b0cf4dfb BH |
416 | if (!seen) |
417 | continue; | |
418 | ||
419 | retval = request_irq(dev->irq = *irqp, eip_interrupt, 0, | |
420 | dev->name, dev); | |
421 | if (retval == -EBUSY) | |
422 | continue; | |
423 | if (retval < 0) | |
424 | goto err_disable; | |
1ffde03d | 425 | break; |
1da177e4 | 426 | } while (*++irqp); |
b0cf4dfb | 427 | |
1da177e4 | 428 | if (*irqp == 0) { |
b0cf4dfb | 429 | err_disable: |
1da177e4 | 430 | outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ |
ab08999d | 431 | return -EAGAIN; |
1da177e4 LT |
432 | } |
433 | } else { | |
055e5110 | 434 | if ((retval = request_irq(dev->irq, eip_interrupt, 0, dev->name, dev))) { |
1da177e4 LT |
435 | return retval; |
436 | } | |
437 | } | |
438 | ||
439 | el2_init_card(dev); | |
055e5110 | 440 | eip_open(dev); |
1da177e4 LT |
441 | return 0; |
442 | } | |
443 | ||
444 | static int | |
445 | el2_close(struct net_device *dev) | |
446 | { | |
447 | free_irq(dev->irq, dev); | |
448 | dev->irq = ei_status.saved_irq; | |
449 | outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */ | |
450 | ||
055e5110 | 451 | eip_close(dev); |
1da177e4 LT |
452 | return 0; |
453 | } | |
454 | ||
455 | /* This is called whenever we have a unrecoverable failure: | |
456 | transmit timeout | |
457 | Bad ring buffer packet header | |
458 | */ | |
459 | static void | |
460 | el2_reset_8390(struct net_device *dev) | |
461 | { | |
462 | if (ei_debug > 1) { | |
646cdb32 AB |
463 | pr_debug("%s: Resetting the 3c503 board...", dev->name); |
464 | pr_cont(" %#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR), | |
1da177e4 LT |
465 | E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR)); |
466 | } | |
467 | outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL); | |
468 | ei_status.txing = 0; | |
469 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
470 | el2_init_card(dev); | |
646cdb32 AB |
471 | if (ei_debug > 1) |
472 | pr_cont("done\n"); | |
1da177e4 LT |
473 | } |
474 | ||
475 | /* Initialize the 3c503 GA registers after a reset. */ | |
476 | static void | |
477 | el2_init_card(struct net_device *dev) | |
478 | { | |
479 | /* Unmap the station PROM and select the DIX or BNC connector. */ | |
480 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
481 | ||
482 | /* Set ASIC copy of rx's first and last+1 buffer pages */ | |
483 | /* These must be the same as in the 8390. */ | |
484 | outb(ei_status.rx_start_page, E33G_STARTPG); | |
485 | outb(ei_status.stop_page, E33G_STOPPG); | |
486 | ||
487 | /* Point the vector pointer registers somewhere ?harmless?. */ | |
488 | outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */ | |
489 | outb(0xff, E33G_VP1); | |
490 | outb(0x00, E33G_VP0); | |
491 | /* Turn off all interrupts until we're opened. */ | |
492 | outb_p(0x00, dev->base_addr + EN0_IMR); | |
493 | /* Enable IRQs iff started. */ | |
494 | outb(EGACFR_NORM, E33G_GACFR); | |
495 | ||
496 | /* Set the interrupt line. */ | |
497 | outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR); | |
498 | outb_p((WRD_COUNT << 1), E33G_DRQCNT); /* Set burst size to 8 */ | |
499 | outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */ | |
500 | outb_p(0x00, E33G_DMAAL); | |
501 | return; /* We always succeed */ | |
502 | } | |
503 | ||
504 | /* | |
505 | * Either use the shared memory (if enabled on the board) or put the packet | |
506 | * out through the ASIC FIFO. | |
507 | */ | |
508 | static void | |
509 | el2_block_output(struct net_device *dev, int count, | |
510 | const unsigned char *buf, int start_page) | |
511 | { | |
512 | unsigned short int *wrd; | |
513 | int boguscount; /* timeout counter */ | |
514 | unsigned short word; /* temporary for better machine code */ | |
515 | void __iomem *base = ei_status.mem; | |
516 | ||
517 | if (ei_status.word16) /* Tx packets go into bank 0 on EL2/16 card */ | |
518 | outb(EGACFR_RSEL|EGACFR_TCM, E33G_GACFR); | |
519 | else | |
520 | outb(EGACFR_NORM, E33G_GACFR); | |
521 | ||
522 | if (base) { /* Shared memory transfer */ | |
523 | memcpy_toio(base + ((start_page - ei_status.tx_start_page) << 8), | |
524 | buf, count); | |
525 | outb(EGACFR_NORM, E33G_GACFR); /* Back to bank1 in case on bank0 */ | |
526 | return; | |
527 | } | |
528 | ||
529 | /* | |
530 | * No shared memory, put the packet out the other way. | |
531 | * Set up then start the internal memory transfer to Tx Start Page | |
532 | */ | |
533 | ||
534 | word = (unsigned short)start_page; | |
535 | outb(word&0xFF, E33G_DMAAH); | |
536 | outb(word>>8, E33G_DMAAL); | |
537 | ||
538 | outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT | |
539 | | ECNTRL_START, E33G_CNTRL); | |
540 | ||
541 | /* | |
542 | * Here I am going to write data to the FIFO as quickly as possible. | |
543 | * Note that E33G_FIFOH is defined incorrectly. It is really | |
544 | * E33G_FIFOL, the lowest port address for both the byte and | |
545 | * word write. Variable 'count' is NOT checked. Caller must supply a | |
546 | * valid count. Note that I may write a harmless extra byte to the | |
547 | * 8390 if the byte-count was not even. | |
548 | */ | |
549 | wrd = (unsigned short int *) buf; | |
550 | count = (count + 1) >> 1; | |
551 | for(;;) | |
552 | { | |
553 | boguscount = 0x1000; | |
554 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
555 | { | |
556 | if(!boguscount--) | |
557 | { | |
646cdb32 | 558 | pr_notice("%s: FIFO blocked in el2_block_output.\n", dev->name); |
1da177e4 LT |
559 | el2_reset_8390(dev); |
560 | goto blocked; | |
561 | } | |
562 | } | |
563 | if(count > WRD_COUNT) | |
564 | { | |
565 | outsw(E33G_FIFOH, wrd, WRD_COUNT); | |
566 | wrd += WRD_COUNT; | |
567 | count -= WRD_COUNT; | |
568 | } | |
569 | else | |
570 | { | |
571 | outsw(E33G_FIFOH, wrd, count); | |
572 | break; | |
573 | } | |
574 | } | |
575 | blocked:; | |
576 | outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
1da177e4 LT |
577 | } |
578 | ||
579 | /* Read the 4 byte, page aligned 8390 specific header. */ | |
580 | static void | |
581 | el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) | |
582 | { | |
583 | int boguscount; | |
584 | void __iomem *base = ei_status.mem; | |
585 | unsigned short word; | |
586 | ||
587 | if (base) { /* Use the shared memory. */ | |
588 | void __iomem *hdr_start = base + ((ring_page - EL2_MB1_START_PG)<<8); | |
589 | memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); | |
590 | hdr->count = le16_to_cpu(hdr->count); | |
591 | return; | |
592 | } | |
593 | ||
594 | /* | |
595 | * No shared memory, use programmed I/O. | |
596 | */ | |
597 | ||
598 | word = (unsigned short)ring_page; | |
599 | outb(word&0xFF, E33G_DMAAH); | |
600 | outb(word>>8, E33G_DMAAL); | |
601 | ||
602 | outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT | |
603 | | ECNTRL_START, E33G_CNTRL); | |
604 | boguscount = 0x1000; | |
605 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
606 | { | |
607 | if(!boguscount--) | |
608 | { | |
646cdb32 | 609 | pr_notice("%s: FIFO blocked in el2_get_8390_hdr.\n", dev->name); |
1da177e4 LT |
610 | memset(hdr, 0x00, sizeof(struct e8390_pkt_hdr)); |
611 | el2_reset_8390(dev); | |
612 | goto blocked; | |
613 | } | |
614 | } | |
615 | insw(E33G_FIFOH, hdr, (sizeof(struct e8390_pkt_hdr))>> 1); | |
616 | blocked:; | |
617 | outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
618 | } | |
619 | ||
620 | ||
621 | static void | |
622 | el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) | |
623 | { | |
624 | int boguscount = 0; | |
625 | void __iomem *base = ei_status.mem; | |
626 | unsigned short int *buf; | |
627 | unsigned short word; | |
628 | ||
629 | /* Maybe enable shared memory just be to be safe... nahh.*/ | |
630 | if (base) { /* Use the shared memory. */ | |
631 | ring_offset -= (EL2_MB1_START_PG<<8); | |
632 | if (ring_offset + count > EL2_MEMSIZE) { | |
633 | /* We must wrap the input move. */ | |
634 | int semi_count = EL2_MEMSIZE - ring_offset; | |
635 | memcpy_fromio(skb->data, base + ring_offset, semi_count); | |
636 | count -= semi_count; | |
637 | memcpy_fromio(skb->data + semi_count, base + ei_status.priv, count); | |
638 | } else { | |
4ec03116 | 639 | memcpy_fromio(skb->data, base + ring_offset, count); |
1da177e4 LT |
640 | } |
641 | return; | |
642 | } | |
643 | ||
644 | /* | |
645 | * No shared memory, use programmed I/O. | |
646 | */ | |
647 | word = (unsigned short) ring_offset; | |
648 | outb(word>>8, E33G_DMAAH); | |
649 | outb(word&0xFF, E33G_DMAAL); | |
650 | ||
651 | outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT | |
652 | | ECNTRL_START, E33G_CNTRL); | |
653 | ||
654 | /* | |
655 | * Here I also try to get data as fast as possible. I am betting that I | |
656 | * can read one extra byte without clobbering anything in the kernel because | |
657 | * this would only occur on an odd byte-count and allocation of skb->data | |
658 | * is word-aligned. Variable 'count' is NOT checked. Caller must check | |
659 | * for a valid count. | |
660 | * [This is currently quite safe.... but if one day the 3c503 explodes | |
661 | * you know where to come looking ;)] | |
662 | */ | |
663 | ||
664 | buf = (unsigned short int *) skb->data; | |
665 | count = (count + 1) >> 1; | |
666 | for(;;) | |
667 | { | |
668 | boguscount = 0x1000; | |
669 | while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0) | |
670 | { | |
671 | if(!boguscount--) | |
672 | { | |
646cdb32 | 673 | pr_notice("%s: FIFO blocked in el2_block_input.\n", dev->name); |
1da177e4 LT |
674 | el2_reset_8390(dev); |
675 | goto blocked; | |
676 | } | |
677 | } | |
678 | if(count > WRD_COUNT) | |
679 | { | |
680 | insw(E33G_FIFOH, buf, WRD_COUNT); | |
681 | buf += WRD_COUNT; | |
682 | count -= WRD_COUNT; | |
683 | } | |
684 | else | |
685 | { | |
686 | insw(E33G_FIFOH, buf, count); | |
687 | break; | |
688 | } | |
689 | } | |
690 | blocked:; | |
691 | outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL); | |
1da177e4 LT |
692 | } |
693 | ||
694 | ||
695 | static void netdev_get_drvinfo(struct net_device *dev, | |
696 | struct ethtool_drvinfo *info) | |
697 | { | |
698 | strcpy(info->driver, DRV_NAME); | |
699 | strcpy(info->version, DRV_VERSION); | |
700 | sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); | |
701 | } | |
702 | ||
7282d491 | 703 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
704 | .get_drvinfo = netdev_get_drvinfo, |
705 | }; | |
706 | ||
707 | #ifdef MODULE | |
708 | #define MAX_EL2_CARDS 4 /* Max number of EL2 cards per module */ | |
709 | ||
710 | static struct net_device *dev_el2[MAX_EL2_CARDS]; | |
711 | static int io[MAX_EL2_CARDS]; | |
712 | static int irq[MAX_EL2_CARDS]; | |
713 | static int xcvr[MAX_EL2_CARDS]; /* choose int. or ext. xcvr */ | |
714 | module_param_array(io, int, NULL, 0); | |
715 | module_param_array(irq, int, NULL, 0); | |
716 | module_param_array(xcvr, int, NULL, 0); | |
717 | MODULE_PARM_DESC(io, "I/O base address(es)"); | |
718 | MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); | |
719 | MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)"); | |
720 | MODULE_DESCRIPTION("3Com ISA EtherLink II, II/16 (3c503, 3c503/16) driver"); | |
721 | MODULE_LICENSE("GPL"); | |
722 | ||
723 | /* This is set up so that only a single autoprobe takes place per call. | |
724 | ISA device autoprobes on a running machine are not recommended. */ | |
96e672c7 | 725 | int __init |
1da177e4 LT |
726 | init_module(void) |
727 | { | |
728 | struct net_device *dev; | |
729 | int this_dev, found = 0; | |
730 | ||
731 | for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { | |
732 | if (io[this_dev] == 0) { | |
733 | if (this_dev != 0) break; /* only autoprobe 1st one */ | |
646cdb32 | 734 | pr_notice("3c503.c: Presently autoprobing (not recommended) for a single card.\n"); |
1da177e4 | 735 | } |
055e5110 | 736 | dev = alloc_eip_netdev(); |
1da177e4 LT |
737 | if (!dev) |
738 | break; | |
739 | dev->irq = irq[this_dev]; | |
740 | dev->base_addr = io[this_dev]; | |
741 | dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */ | |
742 | if (do_el2_probe(dev) == 0) { | |
b1fc5505 HX |
743 | dev_el2[found++] = dev; |
744 | continue; | |
1da177e4 LT |
745 | } |
746 | free_netdev(dev); | |
646cdb32 | 747 | pr_warning("3c503.c: No 3c503 card found (i/o = 0x%x).\n", io[this_dev]); |
1da177e4 LT |
748 | break; |
749 | } | |
750 | if (found) | |
751 | return 0; | |
752 | return -ENXIO; | |
753 | } | |
754 | ||
64916f1e DV |
755 | static void cleanup_card(struct net_device *dev) |
756 | { | |
757 | /* NB: el2_close() handles free_irq */ | |
758 | release_region(dev->base_addr, EL2_IO_EXTENT); | |
759 | if (ei_status.mem) | |
760 | iounmap(ei_status.mem); | |
761 | } | |
762 | ||
afc8eb46 | 763 | void __exit |
1da177e4 LT |
764 | cleanup_module(void) |
765 | { | |
766 | int this_dev; | |
767 | ||
768 | for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) { | |
769 | struct net_device *dev = dev_el2[this_dev]; | |
770 | if (dev) { | |
771 | unregister_netdev(dev); | |
772 | cleanup_card(dev); | |
773 | free_netdev(dev); | |
774 | } | |
775 | } | |
776 | } | |
777 | #endif /* MODULE */ |