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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#include <linux/interrupt.h>
36
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. */
48#define AC_ADDR1 0x40
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);
92
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 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
124#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;
139 return dev;
140out:
141 free_netdev(dev);
142 return ERR_PTR(err);
143}
144#endif
145
146static const struct net_device_ops ac_netdev_ops = {
147 .ndo_open = ac_open,
148 .ndo_stop = ac_close_card,
149
150 .ndo_start_xmit = ei_start_xmit,
151 .ndo_tx_timeout = ei_tx_timeout,
152 .ndo_get_stats = ei_get_stats,
153 .ndo_set_rx_mode = ei_set_multicast_list,
154 .ndo_validate_addr = eth_validate_addr,
155 .ndo_set_mac_address = eth_mac_addr,
156 .ndo_change_mtu = eth_change_mtu,
157#ifdef CONFIG_NET_POLL_CONTROLLER
158 .ndo_poll_controller = ei_poll,
159#endif
160};
161
162static int __init ac_probe1(int ioaddr, struct net_device *dev)
163{
164 int i, retval;
165
166 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
167 return -EBUSY;
168
169 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
170 retval = -ENODEV;
171 goto out;
172 }
173
174 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
175 retval = -ENODEV;
176 goto out;
177 }
178
179#ifndef final_version
180 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
181 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
182 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
183 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
184#endif
185
186 for (i = 0; i < 6; i++)
187 dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
188
189 printk(KERN_DEBUG "AC3200 in EISA slot %d, node %pM",
190 ioaddr/0x1000, dev->dev_addr);
191#if 0
192 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
193 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
194 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
195 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
196 printk(", not found (invalid prefix).\n");
197 retval = -ENODEV;
198 goto out;
199 }
200#endif
201
202 /* Assign and allocate the interrupt now. */
203 if (dev->irq == 0) {
204 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
205 printk(", using");
206 } else {
207 dev->irq = irq_canonicalize(dev->irq);
208 printk(", assigning");
209 }
210
211 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
212 if (retval) {
213 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
214 goto out;
215 }
216
217 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
218
219 dev->base_addr = ioaddr;
220
221#ifdef notyet
222 if (dev->mem_start) { /* Override the value from the board. */
223 for (i = 0; i < 7; i++)
224 if (addrmap[i] == dev->mem_start)
225 break;
226 if (i >= 7)
227 i = 0;
228 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
229 }
230#endif
231
232 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
233 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
234
235 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
236 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
237
238 /*
239 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
240 * the card mem within the region covered by `normal' RAM !!!
241 *
242 * ioremap() will fail in that case.
243 */
244 ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
245 if (!ei_status.mem) {
246 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
247 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
248 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
249 retval = -EINVAL;
250 goto out1;
251 }
252 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
253 AC_STOP_PG/4, ei_status.mem);
254
255 dev->mem_start = (unsigned long)ei_status.mem;
256 dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
257
258 ei_status.name = "AC3200";
259 ei_status.tx_start_page = AC_START_PG;
260 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
261 ei_status.stop_page = AC_STOP_PG;
262 ei_status.word16 = 1;
263
264 if (ei_debug > 0)
265 printk(version);
266
267 ei_status.reset_8390 = &ac_reset_8390;
268 ei_status.block_input = &ac_block_input;
269 ei_status.block_output = &ac_block_output;
270 ei_status.get_8390_hdr = &ac_get_8390_hdr;
271
272 dev->netdev_ops = &ac_netdev_ops;
273 NS8390_init(dev, 0);
274
275 retval = register_netdev(dev);
276 if (retval)
277 goto out2;
278 return 0;
279out2:
280 if (ei_status.reg0)
281 iounmap(ei_status.mem);
282out1:
283 free_irq(dev->irq, dev);
284out:
285 release_region(ioaddr, AC_IO_EXTENT);
286 return retval;
287}
288
289static int ac_open(struct net_device *dev)
290{
291#ifdef notyet
292 /* Someday we may enable the IRQ and shared memory here. */
293 int ioaddr = dev->base_addr;
294#endif
295
296 ei_open(dev);
297 return 0;
298}
299
300static void ac_reset_8390(struct net_device *dev)
301{
302 ushort ioaddr = dev->base_addr;
303
304 outb(AC_RESET, ioaddr + AC_RESET_PORT);
305 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
306
307 ei_status.txing = 0;
308 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
309 if (ei_debug > 1) printk("reset done\n");
310}
311
312/* Grab the 8390 specific header. Similar to the block_input routine, but
313 we don't need to be concerned with ring wrap as the header will be at
314 the start of a page, so we optimize accordingly. */
315
316static void
317ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
318{
319 void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
320 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
321}
322
323/* Block input and output are easy on shared memory ethercards, the only
324 complication is when the ring buffer wraps. */
325
326static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
327 int ring_offset)
328{
329 void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
330
331 if (ring_offset + count > AC_STOP_PG*256) {
332 /* We must wrap the input move. */
333 int semi_count = AC_STOP_PG*256 - ring_offset;
334 memcpy_fromio(skb->data, start, semi_count);
335 count -= semi_count;
336 memcpy_fromio(skb->data + semi_count,
337 ei_status.mem + TX_PAGES*256, count);
338 } else {
339 memcpy_fromio(skb->data, start, count);
340 }
341}
342
343static void ac_block_output(struct net_device *dev, int count,
344 const unsigned char *buf, int start_page)
345{
346 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
347
348 memcpy_toio(shmem, buf, count);
349}
350
351static int ac_close_card(struct net_device *dev)
352{
353 if (ei_debug > 1)
354 printk("%s: Shutting down ethercard.\n", dev->name);
355
356#ifdef notyet
357 /* We should someday disable shared memory and interrupts. */
358 outb(0x00, ioaddr + 6); /* Disable interrupts. */
359 free_irq(dev->irq, dev);
360#endif
361
362 ei_close(dev);
363 return 0;
364}
365
366#ifdef MODULE
367#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
368static struct net_device *dev_ac32[MAX_AC32_CARDS];
369static int io[MAX_AC32_CARDS];
370static int irq[MAX_AC32_CARDS];
371static int mem[MAX_AC32_CARDS];
372module_param_array(io, int, NULL, 0);
373module_param_array(irq, int, NULL, 0);
374module_param_array(mem, int, NULL, 0);
375MODULE_PARM_DESC(io, "I/O base address(es)");
376MODULE_PARM_DESC(irq, "IRQ number(s)");
377MODULE_PARM_DESC(mem, "Memory base address(es)");
378MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
379MODULE_LICENSE("GPL");
380
381static int __init ac3200_module_init(void)
382{
383 struct net_device *dev;
384 int this_dev, found = 0;
385
386 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
387 if (io[this_dev] == 0 && this_dev != 0)
388 break;
389 dev = alloc_ei_netdev();
390 if (!dev)
391 break;
392 dev->irq = irq[this_dev];
393 dev->base_addr = io[this_dev];
394 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
395 if (do_ac3200_probe(dev) == 0) {
396 dev_ac32[found++] = dev;
397 continue;
398 }
399 free_netdev(dev);
400 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
401 break;
402 }
403 if (found)
404 return 0;
405 return -ENXIO;
406}
407
408static void cleanup_card(struct net_device *dev)
409{
410 /* Someday free_irq may be in ac_close_card() */
411 free_irq(dev->irq, dev);
412 release_region(dev->base_addr, AC_IO_EXTENT);
413 iounmap(ei_status.mem);
414}
415
416static void __exit ac3200_module_exit(void)
417{
418 int this_dev;
419
420 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
421 struct net_device *dev = dev_ac32[this_dev];
422 if (dev) {
423 unregister_netdev(dev);
424 cleanup_card(dev);
425 free_netdev(dev);
426 }
427 }
428}
429module_init(ac3200_module_init);
430module_exit(ac3200_module_exit);
431#endif /* MODULE */