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epca.c: reformat comments and coding style improvements
[linux-2.6/openmoko-kernel.git] / drivers / net / ac3200.c
blob5136d94923aa3910e0007982dd7893c493e2fd62
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
24 static 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. */
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. */
67 static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
68 static int addrmap[8] =
69 {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
70 static 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
80 static int ac_probe1(int ioaddr, struct net_device *dev);
81
82 static int ac_open(struct net_device *dev);
83 static void ac_reset_8390(struct net_device *dev);
84 static void ac_block_input(struct net_device *dev, int count,
85 struct sk_buff *skb, int ring_offset);
86 static void ac_block_output(struct net_device *dev, const int count,
87 const unsigned char *buf, const int start_page);
88 static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
89 int ring_page);
90
91 static 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
100 static 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
125 struct 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;
140 out:
141 free_netdev(dev);
142 return ERR_PTR(err);
143 }
144 #endif
145
146 static int __init ac_probe1(int ioaddr, struct net_device *dev)
147 {
148 int i, retval;
149 DECLARE_MAC_BUF(mac);
150
151 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
152 return -EBUSY;
153
154 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
155 retval = -ENODEV;
156 goto out;
157 }
158
159 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
160 retval = -ENODEV;
161 goto out;
162 }
163
164 #ifndef final_version
165 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
166 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
167 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
168 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
169 #endif
170
171 for (i = 0; i < 6; i++)
172 dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
173
174 printk(KERN_DEBUG "AC3200 in EISA slot %d, node %s",
175 ioaddr/0x1000, print_mac(mac, dev->dev_addr));
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
220 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
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);
263
264 retval = register_netdev(dev);
265 if (retval)
266 goto out2;
267 return 0;
268 out2:
269 if (ei_status.reg0)
270 iounmap(ei_status.mem);
271 out1:
272 free_irq(dev->irq, dev);
273 out:
274 release_region(ioaddr, AC_IO_EXTENT);
275 return retval;
276 }
277
278 static 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
289 static 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
307 static void
308 ac_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
317 static 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 memcpy_fromio(skb->data, start, count);
331 }
332 }
333
334 static void ac_block_output(struct net_device *dev, int count,
335 const unsigned char *buf, int start_page)
336 {
337 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
338
339 memcpy_toio(shmem, buf, count);
340 }
341
342 static int ac_close_card(struct net_device *dev)
343 {
344 if (ei_debug > 1)
345 printk("%s: Shutting down ethercard.\n", dev->name);
346
347 #ifdef notyet
348 /* We should someday disable shared memory and interrupts. */
349 outb(0x00, ioaddr + 6); /* Disable interrupts. */
350 free_irq(dev->irq, dev);
351 #endif
352
353 ei_close(dev);
354 return 0;
355 }
356
357 #ifdef MODULE
358 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
359 static struct net_device *dev_ac32[MAX_AC32_CARDS];
360 static int io[MAX_AC32_CARDS];
361 static int irq[MAX_AC32_CARDS];
362 static int mem[MAX_AC32_CARDS];
363 module_param_array(io, int, NULL, 0);
364 module_param_array(irq, int, NULL, 0);
365 module_param_array(mem, int, NULL, 0);
366 MODULE_PARM_DESC(io, "I/O base address(es)");
367 MODULE_PARM_DESC(irq, "IRQ number(s)");
368 MODULE_PARM_DESC(mem, "Memory base address(es)");
369 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
370 MODULE_LICENSE("GPL");
371
372 int __init init_module(void)
373 {
374 struct net_device *dev;
375 int this_dev, found = 0;
376
377 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
378 if (io[this_dev] == 0 && this_dev != 0)
379 break;
380 dev = alloc_ei_netdev();
381 if (!dev)
382 break;
383 dev->irq = irq[this_dev];
384 dev->base_addr = io[this_dev];
385 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
386 if (do_ac3200_probe(dev) == 0) {
387 dev_ac32[found++] = dev;
388 continue;
389 }
390 free_netdev(dev);
391 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
392 break;
393 }
394 if (found)
395 return 0;
396 return -ENXIO;
397 }
398
399 static void cleanup_card(struct net_device *dev)
400 {
401 /* Someday free_irq may be in ac_close_card() */
402 free_irq(dev->irq, dev);
403 release_region(dev->base_addr, AC_IO_EXTENT);
404 iounmap(ei_status.mem);
405 }
406
407 void __exit
408 cleanup_module(void)
409 {
410 int this_dev;
411
412 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
413 struct net_device *dev = dev_ac32[this_dev];
414 if (dev) {
415 unregister_netdev(dev);
416 cleanup_card(dev);
417 free_netdev(dev);
418 }
419 }
420 }
421 #endif /* MODULE */
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