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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
2/*
3 Written 1993, 1994 by Donald Becker.
4 Copyright 1993 United States Government as represented by the Director,
5 National Security Agency. This software may only be used and distributed
6 according to the terms of the GNU General Public License as modified by SRC,
7 incorporated herein by reference.
8
9 The author may be reached as becker@scyld.com, or C/O
10 Scyld Computing Corporation
11 410 Severn Ave., Suite 210
12 Annapolis MD 21403
13
14 This is driver for the Ansel Communications Model 3200 EISA Ethernet LAN
15 Adapter. The programming information is from the users manual, as related
16 by glee@ardnassak.math.clemson.edu.
17
18 Changelog:
19
20 Paul Gortmaker 05/98 : add support for shared mem above 1MB.
21
22 */
23
24static const char version[] =
25 "ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
26
27#include <linux/module.h>
28#include <linux/eisa.h>
29#include <linux/kernel.h>
30#include <linux/errno.h>
31#include <linux/string.h>
32#include <linux/netdevice.h>
33#include <linux/etherdevice.h>
34#include <linux/init.h>
35
36#include <asm/system.h>
37#include <asm/io.h>
38#include <asm/irq.h>
39
40#include "8390.h"
41
42#define DRV_NAME "ac3200"
43
44/* Offsets from the base address. */
45#define AC_NIC_BASE 0x00
46#define AC_SA_PROM 0x16 /* The station address PROM. */
47#define AC_ADDR0 0x00 /* Prefix station address values. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -040048#define AC_ADDR1 0x40
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define AC_ADDR2 0x90
50#define AC_ID_PORT 0xC80
51#define AC_EISA_ID 0x0110d305
52#define AC_RESET_PORT 0xC84
53#define AC_RESET 0x00
54#define AC_ENABLE 0x01
55#define AC_CONFIG 0xC90 /* The configuration port. */
56
57#define AC_IO_EXTENT 0x20
58 /* Actually accessed is:
59 * AC_NIC_BASE (0-15)
60 * AC_SA_PROM (0-5)
61 * AC_ID_PORT (0-3)
62 * AC_RESET_PORT
63 * AC_CONFIG
64 */
65
66/* Decoding of the configuration register. */
67static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
68static int addrmap[8] =
69{0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
70static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
71
72#define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
73#define config2mem(configval) addrmap[(configval) & 7]
74#define config2name(configval) port_name[((configval) >> 6) & 3]
75
76/* First and last 8390 pages. */
77#define AC_START_PG 0x00 /* First page of 8390 TX buffer */
78#define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
79
80static int ac_probe1(int ioaddr, struct net_device *dev);
81
82static int ac_open(struct net_device *dev);
83static void ac_reset_8390(struct net_device *dev);
84static void ac_block_input(struct net_device *dev, int count,
85 struct sk_buff *skb, int ring_offset);
86static void ac_block_output(struct net_device *dev, const int count,
87 const unsigned char *buf, const int start_page);
88static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
89 int ring_page);
90
91static int ac_close_card(struct net_device *dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -040092
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94/* Probe for the AC3200.
95
96 The AC3200 can be identified by either the EISA configuration registers,
97 or the unique value in the station address PROM.
98 */
99
100static int __init do_ac3200_probe(struct net_device *dev)
101{
102 unsigned short ioaddr = dev->base_addr;
103 int irq = dev->irq;
104 int mem_start = dev->mem_start;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 if (ioaddr > 0x1ff) /* Check a single specified location. */
107 return ac_probe1(ioaddr, dev);
108 else if (ioaddr > 0) /* Don't probe at all. */
109 return -ENXIO;
110
111 if ( ! EISA_bus)
112 return -ENXIO;
113
114 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
115 if (ac_probe1(ioaddr, dev) == 0)
116 return 0;
117 dev->irq = irq;
118 dev->mem_start = mem_start;
119 }
120
121 return -ENODEV;
122}
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124#ifndef MODULE
125struct net_device * __init ac3200_probe(int unit)
126{
127 struct net_device *dev = alloc_ei_netdev();
128 int err;
129
130 if (!dev)
131 return ERR_PTR(-ENOMEM);
132
133 sprintf(dev->name, "eth%d", unit);
134 netdev_boot_setup_check(dev);
135
136 err = do_ac3200_probe(dev);
137 if (err)
138 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140out:
141 free_netdev(dev);
142 return ERR_PTR(err);
143}
144#endif
145
146static int __init ac_probe1(int ioaddr, struct net_device *dev)
147{
148 int i, retval;
149
150 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
151 return -EBUSY;
152
153 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
154 retval = -ENODEV;
155 goto out;
156 }
157
158 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
159 retval = -ENODEV;
160 goto out;
161 }
162
163#ifndef final_version
164 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
165 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
166 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
167 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
168#endif
169
Joe Perches0795af52007-10-03 17:59:30 -0700170 for (i = 0; i < 6; i++)
171 dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Johannes Berge1749612008-10-27 15:59:26 -0700173 printk(KERN_DEBUG "AC3200 in EISA slot %d, node %pM",
174 ioaddr/0x1000, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175#if 0
176 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
177 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
178 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
179 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
180 printk(", not found (invalid prefix).\n");
181 retval = -ENODEV;
182 goto out;
183 }
184#endif
185
186 /* Assign and allocate the interrupt now. */
187 if (dev->irq == 0) {
188 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
189 printk(", using");
190 } else {
191 dev->irq = irq_canonicalize(dev->irq);
192 printk(", assigning");
193 }
194
195 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
196 if (retval) {
197 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
198 goto out1;
199 }
200
201 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
202
203 dev->base_addr = ioaddr;
204
205#ifdef notyet
206 if (dev->mem_start) { /* Override the value from the board. */
207 for (i = 0; i < 7; i++)
208 if (addrmap[i] == dev->mem_start)
209 break;
210 if (i >= 7)
211 i = 0;
212 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
213 }
214#endif
215
216 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
217 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
218
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400219 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
221
222 /*
223 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
224 * the card mem within the region covered by `normal' RAM !!!
225 *
226 * ioremap() will fail in that case.
227 */
228 ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
229 if (!ei_status.mem) {
230 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
231 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
232 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
233 retval = -EINVAL;
234 goto out1;
235 }
236 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
237 AC_STOP_PG/4, ei_status.mem);
238
239 dev->mem_start = (unsigned long)ei_status.mem;
240 dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
241
242 ei_status.name = "AC3200";
243 ei_status.tx_start_page = AC_START_PG;
244 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
245 ei_status.stop_page = AC_STOP_PG;
246 ei_status.word16 = 1;
247
248 if (ei_debug > 0)
249 printk(version);
250
251 ei_status.reset_8390 = &ac_reset_8390;
252 ei_status.block_input = &ac_block_input;
253 ei_status.block_output = &ac_block_output;
254 ei_status.get_8390_hdr = &ac_get_8390_hdr;
255
256 dev->open = &ac_open;
257 dev->stop = &ac_close_card;
258#ifdef CONFIG_NET_POLL_CONTROLLER
259 dev->poll_controller = ei_poll;
260#endif
261 NS8390_init(dev, 0);
b1fc5502005-05-12 20:11:55 -0400262
263 retval = register_netdev(dev);
264 if (retval)
265 goto out2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 return 0;
b1fc5502005-05-12 20:11:55 -0400267out2:
268 if (ei_status.reg0)
viro@ftp.linux.org.uk5ac900372005-09-06 01:36:58 +0100269 iounmap(ei_status.mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270out1:
271 free_irq(dev->irq, dev);
272out:
273 release_region(ioaddr, AC_IO_EXTENT);
274 return retval;
275}
276
277static int ac_open(struct net_device *dev)
278{
279#ifdef notyet
280 /* Someday we may enable the IRQ and shared memory here. */
281 int ioaddr = dev->base_addr;
282#endif
283
284 ei_open(dev);
285 return 0;
286}
287
288static void ac_reset_8390(struct net_device *dev)
289{
290 ushort ioaddr = dev->base_addr;
291
292 outb(AC_RESET, ioaddr + AC_RESET_PORT);
293 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
294
295 ei_status.txing = 0;
296 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
297 if (ei_debug > 1) printk("reset done\n");
298
299 return;
300}
301
302/* Grab the 8390 specific header. Similar to the block_input routine, but
303 we don't need to be concerned with ring wrap as the header will be at
304 the start of a page, so we optimize accordingly. */
305
306static void
307ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
308{
309 void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
310 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
311}
312
313/* Block input and output are easy on shared memory ethercards, the only
314 complication is when the ring buffer wraps. */
315
316static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
317 int ring_offset)
318{
319 void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
320
321 if (ring_offset + count > AC_STOP_PG*256) {
322 /* We must wrap the input move. */
323 int semi_count = AC_STOP_PG*256 - ring_offset;
324 memcpy_fromio(skb->data, start, semi_count);
325 count -= semi_count;
326 memcpy_fromio(skb->data + semi_count,
327 ei_status.mem + TX_PAGES*256, count);
328 } else {
Al Viro4ec03112007-02-09 16:38:30 +0000329 memcpy_fromio(skb->data, start, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 }
331}
332
333static void ac_block_output(struct net_device *dev, int count,
334 const unsigned char *buf, int start_page)
335{
336 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
337
338 memcpy_toio(shmem, buf, count);
339}
340
341static int ac_close_card(struct net_device *dev)
342{
343 if (ei_debug > 1)
344 printk("%s: Shutting down ethercard.\n", dev->name);
345
346#ifdef notyet
347 /* We should someday disable shared memory and interrupts. */
348 outb(0x00, ioaddr + 6); /* Disable interrupts. */
349 free_irq(dev->irq, dev);
350#endif
351
352 ei_close(dev);
353 return 0;
354}
355
356#ifdef MODULE
357#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
358static struct net_device *dev_ac32[MAX_AC32_CARDS];
359static int io[MAX_AC32_CARDS];
360static int irq[MAX_AC32_CARDS];
361static int mem[MAX_AC32_CARDS];
362module_param_array(io, int, NULL, 0);
363module_param_array(irq, int, NULL, 0);
364module_param_array(mem, int, NULL, 0);
365MODULE_PARM_DESC(io, "I/O base address(es)");
366MODULE_PARM_DESC(irq, "IRQ number(s)");
367MODULE_PARM_DESC(mem, "Memory base address(es)");
368MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
369MODULE_LICENSE("GPL");
370
Jon Schindlere8a1d912008-03-05 18:50:41 -0800371static int __init ac3200_module_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
373 struct net_device *dev;
374 int this_dev, found = 0;
375
376 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
377 if (io[this_dev] == 0 && this_dev != 0)
378 break;
379 dev = alloc_ei_netdev();
380 if (!dev)
381 break;
382 dev->irq = irq[this_dev];
383 dev->base_addr = io[this_dev];
384 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
385 if (do_ac3200_probe(dev) == 0) {
b1fc5502005-05-12 20:11:55 -0400386 dev_ac32[found++] = dev;
387 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 }
389 free_netdev(dev);
390 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
391 break;
392 }
393 if (found)
394 return 0;
395 return -ENXIO;
396}
397
Denis Vlasenko64916f12006-01-05 22:45:47 -0800398static void cleanup_card(struct net_device *dev)
399{
400 /* Someday free_irq may be in ac_close_card() */
401 free_irq(dev->irq, dev);
402 release_region(dev->base_addr, AC_IO_EXTENT);
403 iounmap(ei_status.mem);
404}
405
Jon Schindlere8a1d912008-03-05 18:50:41 -0800406static void __exit ac3200_module_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407{
408 int this_dev;
409
410 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
411 struct net_device *dev = dev_ac32[this_dev];
412 if (dev) {
413 unregister_netdev(dev);
414 cleanup_card(dev);
415 free_netdev(dev);
416 }
417 }
418}
Jon Schindlere8a1d912008-03-05 18:50:41 -0800419module_init(ac3200_module_init);
420module_exit(ac3200_module_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421#endif /* MODULE */