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1da177e4
LT		 1/* 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. */
6aa20a22 48#define AC_ADDR1 0x40
1da177e4
LT		 49#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);
6aa20a22 92
1da177e4
LT		 93
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
106 SET_MODULE_OWNER(dev);
107
108 if (ioaddr > 0x1ff) /* Check a single specified location. */
109 return ac_probe1(ioaddr, dev);
110 else if (ioaddr > 0) /* Don't probe at all. */
111 return -ENXIO;
112
113 if ( ! EISA_bus)
114 return -ENXIO;
115
116 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
117 if (ac_probe1(ioaddr, dev) == 0)
118 return 0;
119 dev->irq = irq;
120 dev->mem_start = mem_start;
121 }
122
123 return -ENODEV;
124}
125
1da177e4
LT		 126#ifndef MODULE
127struct net_device * __init ac3200_probe(int unit)
128{
129 struct net_device *dev = alloc_ei_netdev();
130 int err;
131
132 if (!dev)
133 return ERR_PTR(-ENOMEM);
134
135 sprintf(dev->name, "eth%d", unit);
136 netdev_boot_setup_check(dev);
137
138 err = do_ac3200_probe(dev);
139 if (err)
140 goto out;
1da177e4 141 return dev;
1da177e4
LT		 142out:
143 free_netdev(dev);
144 return ERR_PTR(err);
145}
146#endif
147
148static int __init ac_probe1(int ioaddr, struct net_device *dev)
149{
150 int i, retval;
151
152 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
153 return -EBUSY;
154
155 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
156 retval = -ENODEV;
157 goto out;
158 }
159
160 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
161 retval = -ENODEV;
162 goto out;
163 }
164
165#ifndef final_version
166 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
167 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
168 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
169 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
170#endif
171
172 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
173 for(i = 0; i < 6; i++)
174 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
175
176#if 0
177 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
178 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
179 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
180 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
181 printk(", not found (invalid prefix).\n");
182 retval = -ENODEV;
183 goto out;
184 }
185#endif
186
187 /* Assign and allocate the interrupt now. */
188 if (dev->irq == 0) {
189 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
190 printk(", using");
191 } else {
192 dev->irq = irq_canonicalize(dev->irq);
193 printk(", assigning");
194 }
195
196 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
197 if (retval) {
198 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
199 goto out1;
200 }
201
202 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
203
204 dev->base_addr = ioaddr;
205
206#ifdef notyet
207 if (dev->mem_start) { /* Override the value from the board. */
208 for (i = 0; i < 7; i++)
209 if (addrmap[i] == dev->mem_start)
210 break;
211 if (i >= 7)
212 i = 0;
213 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
214 }
215#endif
216
217 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
218 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
219
6aa20a22 220 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
1da177e4
LT		 221 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
222
223 /*
224 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
225 * the card mem within the region covered by `normal' RAM !!!
226 *
227 * ioremap() will fail in that case.
228 */
229 ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
230 if (!ei_status.mem) {
231 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
232 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
233 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
234 retval = -EINVAL;
235 goto out1;
236 }
237 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
238 AC_STOP_PG/4, ei_status.mem);
239
240 dev->mem_start = (unsigned long)ei_status.mem;
241 dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
242
243 ei_status.name = "AC3200";
244 ei_status.tx_start_page = AC_START_PG;
245 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
246 ei_status.stop_page = AC_STOP_PG;
247 ei_status.word16 = 1;
248
249 if (ei_debug > 0)
250 printk(version);
251
252 ei_status.reset_8390 = &ac_reset_8390;
253 ei_status.block_input = &ac_block_input;
254 ei_status.block_output = &ac_block_output;
255 ei_status.get_8390_hdr = &ac_get_8390_hdr;
256
257 dev->open = &ac_open;
258 dev->stop = &ac_close_card;
259#ifdef CONFIG_NET_POLL_CONTROLLER
260 dev->poll_controller = ei_poll;
261#endif
262 NS8390_init(dev, 0);
b1fc5505
HX		 263
264 retval = register_netdev(dev);
265 if (retval)
266 goto out2;
1da177e4 267 return 0;
b1fc5505
HX		 268out2:
269 if (ei_status.reg0)
5ac90037 270 iounmap(ei_status.mem);
1da177e4
LT		 271out1:
272 free_irq(dev->irq, dev);
273out:
274 release_region(ioaddr, AC_IO_EXTENT);
275 return retval;
276}
277
278static int ac_open(struct net_device *dev)
279{
280#ifdef notyet
281 /* Someday we may enable the IRQ and shared memory here. */
282 int ioaddr = dev->base_addr;
283#endif
284
285 ei_open(dev);
286 return 0;
287}
288
289static void ac_reset_8390(struct net_device *dev)
290{
291 ushort ioaddr = dev->base_addr;
292
293 outb(AC_RESET, ioaddr + AC_RESET_PORT);
294 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
295
296 ei_status.txing = 0;
297 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
298 if (ei_debug > 1) printk("reset done\n");
299
300 return;
301}
302
303/* Grab the 8390 specific header. Similar to the block_input routine, but
304 we don't need to be concerned with ring wrap as the header will be at
305 the start of a page, so we optimize accordingly. */
306
307static void
308ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
309{
310 void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
311 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
312}
313
314/* Block input and output are easy on shared memory ethercards, the only
315 complication is when the ring buffer wraps. */
316
317static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
318 int ring_offset)
319{
320 void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
321
322 if (ring_offset + count > AC_STOP_PG*256) {
323 /* We must wrap the input move. */
324 int semi_count = AC_STOP_PG*256 - ring_offset;
325 memcpy_fromio(skb->data, start, semi_count);
326 count -= semi_count;
327 memcpy_fromio(skb->data + semi_count,
328 ei_status.mem + TX_PAGES*256, count);
329 } else {
330 /* Packet is in one chunk -- we can copy + cksum. */
331 eth_io_copy_and_sum(skb, start, count, 0);
332 }
333}
334
335static void ac_block_output(struct net_device *dev, int count,
336 const unsigned char *buf, int start_page)
337{
338 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
339
340 memcpy_toio(shmem, buf, count);
341}
342
343static int ac_close_card(struct net_device *dev)
344{
345 if (ei_debug > 1)
346 printk("%s: Shutting down ethercard.\n", dev->name);
347
348#ifdef notyet
349 /* We should someday disable shared memory and interrupts. */
350 outb(0x00, ioaddr + 6); /* Disable interrupts. */
351 free_irq(dev->irq, dev);
352#endif
353
354 ei_close(dev);
355 return 0;
356}
357
358#ifdef MODULE
359#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
360static struct net_device *dev_ac32[MAX_AC32_CARDS];
361static int io[MAX_AC32_CARDS];
362static int irq[MAX_AC32_CARDS];
363static int mem[MAX_AC32_CARDS];
364module_param_array(io, int, NULL, 0);
365module_param_array(irq, int, NULL, 0);
366module_param_array(mem, int, NULL, 0);
367MODULE_PARM_DESC(io, "I/O base address(es)");
368MODULE_PARM_DESC(irq, "IRQ number(s)");
369MODULE_PARM_DESC(mem, "Memory base address(es)");
370MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
371MODULE_LICENSE("GPL");
372
62a87b80 373int __init init_module(void)
1da177e4
LT		 374{
375 struct net_device *dev;
376 int this_dev, found = 0;
377
378 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
379 if (io[this_dev] == 0 && this_dev != 0)
380 break;
381 dev = alloc_ei_netdev();
382 if (!dev)
383 break;
384 dev->irq = irq[this_dev];
385 dev->base_addr = io[this_dev];
386 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
387 if (do_ac3200_probe(dev) == 0) {
b1fc5505
HX		 388 dev_ac32[found++] = dev;
389 continue;
1da177e4
LT		 390 }
391 free_netdev(dev);
392 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
393 break;
394 }
395 if (found)
396 return 0;
397 return -ENXIO;
398}
399
64916f1e
DV		 400static void cleanup_card(struct net_device *dev)
401{
402 /* Someday free_irq may be in ac_close_card() */
403 free_irq(dev->irq, dev);
404 release_region(dev->base_addr, AC_IO_EXTENT);
405 iounmap(ei_status.mem);
406}
407
1da177e4
LT		 408void
409cleanup_module(void)
410{
411 int this_dev;
412
413 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
414 struct net_device *dev = dev_ac32[this_dev];
415 if (dev) {
416 unregister_netdev(dev);
417 cleanup_card(dev);
418 free_netdev(dev);
419 }
420 }
421}
422#endif /* MODULE */
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