1 /* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */
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.
9 The author may be reached as becker@scyld.com, or C/O
10 Scyld Computing Corporation
11 410 Severn Ave., Suite 210
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.
20 Paul Gortmaker 05/98 : add support for shared mem above 1MB.
24 static const char version[] =
25 "ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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>
36 #include <asm/system.h>
42 #define DRV_NAME "ac3200"
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. */
50 #define AC_ID_PORT 0xC80
51 #define AC_EISA_ID 0x0110d305
52 #define AC_RESET_PORT 0xC84
54 #define AC_ENABLE 0x01
55 #define AC_CONFIG 0xC90 /* The configuration port. */
57 #define AC_IO_EXTENT 0x20
58 /* Actually accessed is:
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"};
72 #define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
73 #define config2mem(configval) addrmap[(configval) & 7]
74 #define config2name(configval) port_name[((configval) >> 6) & 3]
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 */
80 static int ac_probe1(int ioaddr, struct net_device *dev);
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,
91 static int ac_close_card(struct net_device *dev);
94 /* Probe for the AC3200.
96 The AC3200 can be identified by either the EISA configuration registers,
97 or the unique value in the station address PROM.
100 static int __init do_ac3200_probe(struct net_device *dev)
102 unsigned short ioaddr = dev->base_addr;
104 int mem_start = dev->mem_start;
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. */
114 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
115 if (ac_probe1(ioaddr, dev) == 0)
118 dev->mem_start = mem_start;
125 struct net_device * __init ac3200_probe(int unit)
127 struct net_device *dev = alloc_ei_netdev();
131 return ERR_PTR(-ENOMEM);
133 sprintf(dev->name, "eth%d", unit);
134 netdev_boot_setup_check(dev);
136 err = do_ac3200_probe(dev);
146 static const struct net_device_ops ac_netdev_ops = {
148 .ndo_stop = ac_close_card,
150 .ndo_start_xmit = ei_start_xmit,
151 .ndo_tx_timeout = ei_tx_timeout,
152 .ndo_get_stats = ei_get_stats,
153 .ndo_set_multicast_list = 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,
162 static int __init ac_probe1(int ioaddr, struct net_device *dev)
166 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
169 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
174 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
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));
186 for (i = 0; i < 6; i++)
187 dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i);
189 printk(KERN_DEBUG "AC3200 in EISA slot %d, node %pM",
190 ioaddr/0x1000, dev->dev_addr);
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");
202 /* Assign and allocate the interrupt now. */
204 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
207 dev->irq = irq_canonicalize(dev->irq);
208 printk(", assigning");
211 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
213 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
217 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
219 dev->base_addr = ioaddr;
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)
228 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
232 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
233 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
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);
239 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
240 * the card mem within the region covered by `normal' RAM !!!
242 * ioremap() will fail in that case.
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");
252 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
253 AC_STOP_PG/4, ei_status.mem);
255 dev->mem_start = (unsigned long)ei_status.mem;
256 dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
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;
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;
272 dev->netdev_ops = &ac_netdev_ops;
275 retval = register_netdev(dev);
281 iounmap(ei_status.mem);
283 free_irq(dev->irq, dev);
285 release_region(ioaddr, AC_IO_EXTENT);
289 static int ac_open(struct net_device *dev)
292 /* Someday we may enable the IRQ and shared memory here. */
293 int ioaddr = dev->base_addr;
300 static void ac_reset_8390(struct net_device *dev)
302 ushort ioaddr = dev->base_addr;
304 outb(AC_RESET, ioaddr + AC_RESET_PORT);
305 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
308 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
309 if (ei_debug > 1) printk("reset done\n");
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. */
317 ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
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));
323 /* Block input and output are easy on shared memory ethercards, the only
324 complication is when the ring buffer wraps. */
326 static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
329 void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
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);
336 memcpy_fromio(skb->data + semi_count,
337 ei_status.mem + TX_PAGES*256, count);
339 memcpy_fromio(skb->data, start, count);
343 static void ac_block_output(struct net_device *dev, int count,
344 const unsigned char *buf, int start_page)
346 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
348 memcpy_toio(shmem, buf, count);
351 static int ac_close_card(struct net_device *dev)
354 printk("%s: Shutting down ethercard.\n", dev->name);
357 /* We should someday disable shared memory and interrupts. */
358 outb(0x00, ioaddr + 6); /* Disable interrupts. */
359 free_irq(dev->irq, dev);
367 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
368 static struct net_device *dev_ac32[MAX_AC32_CARDS];
369 static int io[MAX_AC32_CARDS];
370 static int irq[MAX_AC32_CARDS];
371 static int mem[MAX_AC32_CARDS];
372 module_param_array(io, int, NULL, 0);
373 module_param_array(irq, int, NULL, 0);
374 module_param_array(mem, int, NULL, 0);
375 MODULE_PARM_DESC(io, "I/O base address(es)");
376 MODULE_PARM_DESC(irq, "IRQ number(s)");
377 MODULE_PARM_DESC(mem, "Memory base address(es)");
378 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
379 MODULE_LICENSE("GPL");
381 static int __init ac3200_module_init(void)
383 struct net_device *dev;
384 int this_dev, found = 0;
386 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
387 if (io[this_dev] == 0 && this_dev != 0)
389 dev = alloc_ei_netdev();
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;
400 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
408 static void cleanup_card(struct net_device *dev)
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);
416 static void __exit ac3200_module_exit(void)
420 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
421 struct net_device *dev = dev_ac32[this_dev];
423 unregister_netdev(dev);
429 module_init(ac3200_module_init);
430 module_exit(ac3200_module_exit);