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 SET_MODULE_OWNER(dev);
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. */
116 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
117 if (ac_probe1(ioaddr, dev) == 0)
120 dev->mem_start = mem_start;
126 static void cleanup_card(struct net_device *dev)
128 /* Someday free_irq may be in ac_close_card() */
129 free_irq(dev->irq, dev);
130 release_region(dev->base_addr, AC_IO_EXTENT);
132 iounmap((void *)dev->mem_start);
136 struct net_device * __init ac3200_probe(int unit)
138 struct net_device *dev = alloc_ei_netdev();
142 return ERR_PTR(-ENOMEM);
144 sprintf(dev->name, "eth%d", unit);
145 netdev_boot_setup_check(dev);
147 err = do_ac3200_probe(dev);
150 err = register_netdev(dev);
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 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
187 for(i = 0; i < 6; i++)
188 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
191 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
192 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
193 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
194 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
195 printk(", not found (invalid prefix).\n");
201 /* Assign and allocate the interrupt now. */
203 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
206 dev->irq = irq_canonicalize(dev->irq);
207 printk(", assigning");
210 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
212 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
216 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
218 dev->base_addr = ioaddr;
221 if (dev->mem_start) { /* Override the value from the board. */
222 for (i = 0; i < 7; i++)
223 if (addrmap[i] == dev->mem_start)
227 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
231 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
232 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
234 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
235 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
238 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
239 * the card mem within the region covered by `normal' RAM !!!
241 if (dev->mem_start > 1024*1024) { /* phys addr > 1MB */
242 if (dev->mem_start < virt_to_phys(high_memory)) {
243 printk(KERN_CRIT "ac3200.c: Card RAM overlaps with normal memory!!!\n");
244 printk(KERN_CRIT "ac3200.c: Use EISA SCU to set card memory below 1MB,\n");
245 printk(KERN_CRIT "ac3200.c: or to an address above 0x%lx.\n", virt_to_phys(high_memory));
246 printk(KERN_CRIT "ac3200.c: Driver NOT installed.\n");
250 dev->mem_start = (unsigned long)ioremap(dev->mem_start, AC_STOP_PG*0x100);
251 if (dev->mem_start == 0) {
252 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
253 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
254 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
258 ei_status.reg0 = 1; /* Use as remap flag */
259 printk("ac3200.c: remapped %dkB card memory to virtual address %#lx\n",
260 AC_STOP_PG/4, dev->mem_start);
263 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
264 dev->mem_end = ei_status.rmem_end = dev->mem_start
265 + (AC_STOP_PG - AC_START_PG)*256;
267 ei_status.name = "AC3200";
268 ei_status.tx_start_page = AC_START_PG;
269 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
270 ei_status.stop_page = AC_STOP_PG;
271 ei_status.word16 = 1;
276 ei_status.reset_8390 = &ac_reset_8390;
277 ei_status.block_input = &ac_block_input;
278 ei_status.block_output = &ac_block_output;
279 ei_status.get_8390_hdr = &ac_get_8390_hdr;
281 dev->open = &ac_open;
282 dev->stop = &ac_close_card;
283 #ifdef CONFIG_NET_POLL_CONTROLLER
284 dev->poll_controller = ei_poll;
289 free_irq(dev->irq, dev);
291 release_region(ioaddr, AC_IO_EXTENT);
295 static int ac_open(struct net_device *dev)
298 /* Someday we may enable the IRQ and shared memory here. */
299 int ioaddr = dev->base_addr;
306 static void ac_reset_8390(struct net_device *dev)
308 ushort ioaddr = dev->base_addr;
310 outb(AC_RESET, ioaddr + AC_RESET_PORT);
311 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
314 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
315 if (ei_debug > 1) printk("reset done\n");
320 /* Grab the 8390 specific header. Similar to the block_input routine, but
321 we don't need to be concerned with ring wrap as the header will be at
322 the start of a page, so we optimize accordingly. */
325 ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
327 unsigned long hdr_start = dev->mem_start + ((ring_page - AC_START_PG)<<8);
328 isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
331 /* Block input and output are easy on shared memory ethercards, the only
332 complication is when the ring buffer wraps. */
334 static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
337 unsigned long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8);
339 if (xfer_start + count > ei_status.rmem_end) {
340 /* We must wrap the input move. */
341 int semi_count = ei_status.rmem_end - xfer_start;
342 isa_memcpy_fromio(skb->data, xfer_start, semi_count);
344 isa_memcpy_fromio(skb->data + semi_count, ei_status.rmem_start, count);
346 /* Packet is in one chunk -- we can copy + cksum. */
347 isa_eth_io_copy_and_sum(skb, xfer_start, count, 0);
351 static void ac_block_output(struct net_device *dev, int count,
352 const unsigned char *buf, int start_page)
354 unsigned long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
356 isa_memcpy_toio(shmem, buf, count);
359 static int ac_close_card(struct net_device *dev)
362 printk("%s: Shutting down ethercard.\n", dev->name);
365 /* We should someday disable shared memory and interrupts. */
366 outb(0x00, ioaddr + 6); /* Disable interrupts. */
367 free_irq(dev->irq, dev);
375 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
376 static struct net_device *dev_ac32[MAX_AC32_CARDS];
377 static int io[MAX_AC32_CARDS];
378 static int irq[MAX_AC32_CARDS];
379 static int mem[MAX_AC32_CARDS];
380 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
381 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
382 MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
383 MODULE_PARM_DESC(io, "I/O base address(es)");
384 MODULE_PARM_DESC(irq, "IRQ number(s)");
385 MODULE_PARM_DESC(mem, "Memory base address(es)");
386 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
387 MODULE_LICENSE("GPL");
392 struct net_device *dev;
393 int this_dev, found = 0;
395 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
396 if (io[this_dev] == 0 && this_dev != 0)
398 dev = alloc_ei_netdev();
401 dev->irq = irq[this_dev];
402 dev->base_addr = io[this_dev];
403 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
404 if (do_ac3200_probe(dev) == 0) {
405 if (register_netdev(dev) == 0) {
406 dev_ac32[found++] = dev;
412 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
425 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
426 struct net_device *dev = dev_ac32[this_dev];
428 unregister_netdev(dev);