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 /* Offsets from the base address. */
43 #define AC_NIC_BASE 0x00
44 #define AC_SA_PROM 0x16 /* The station address PROM. */
45 #define AC_ADDR0 0x00 /* Prefix station address values. */
48 #define AC_ID_PORT 0xC80
49 #define AC_EISA_ID 0x0110d305
50 #define AC_RESET_PORT 0xC84
52 #define AC_ENABLE 0x01
53 #define AC_CONFIG 0xC90 /* The configuration port. */
55 #define AC_IO_EXTENT 0x20
56 /* Actually accessed is:
64 /* Decoding of the configuration register. */
65 static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
66 static int addrmap[8] =
67 {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
68 static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
70 #define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
71 #define config2mem(configval) addrmap[(configval) & 7]
72 #define config2name(configval) port_name[((configval) >> 6) & 3]
74 /* First and last 8390 pages. */
75 #define AC_START_PG 0x00 /* First page of 8390 TX buffer */
76 #define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
78 static int ac_probe1(int ioaddr, struct net_device *dev);
80 static int ac_open(struct net_device *dev);
81 static void ac_reset_8390(struct net_device *dev);
82 static void ac_block_input(struct net_device *dev, int count,
83 struct sk_buff *skb, int ring_offset);
84 static void ac_block_output(struct net_device *dev, const int count,
85 const unsigned char *buf, const int start_page);
86 static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
89 static int ac_close_card(struct net_device *dev);
92 /* Probe for the AC3200.
94 The AC3200 can be identified by either the EISA configuration registers,
95 or the unique value in the station address PROM.
98 static int __init do_ac3200_probe(struct net_device *dev)
100 unsigned short ioaddr = dev->base_addr;
102 int mem_start = dev->mem_start;
104 SET_MODULE_OWNER(dev);
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;
124 static void cleanup_card(struct net_device *dev)
126 /* Someday free_irq may be in ac_close_card() */
127 free_irq(dev->irq, dev);
128 release_region(dev->base_addr, AC_IO_EXTENT);
130 iounmap((void *)dev->mem_start);
133 struct net_device * __init ac3200_probe(int unit)
135 struct net_device *dev = alloc_ei_netdev();
139 return ERR_PTR(-ENOMEM);
141 sprintf(dev->name, "eth%d", unit);
142 netdev_boot_setup_check(dev);
144 err = do_ac3200_probe(dev);
147 err = register_netdev(dev);
158 static int __init ac_probe1(int ioaddr, struct net_device *dev)
162 if (!request_region(ioaddr, AC_IO_EXTENT, dev->name))
165 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
170 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
175 #ifndef final_version
176 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
177 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
178 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
179 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
182 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
183 for(i = 0; i < 6; i++)
184 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
187 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
188 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
189 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
190 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
191 printk(", not found (invalid prefix).\n");
197 /* Assign and allocate the interrupt now. */
199 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
202 dev->irq = irq_canonicalize(dev->irq);
203 printk(", assigning");
206 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
208 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
212 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
214 dev->base_addr = ioaddr;
217 if (dev->mem_start) { /* Override the value from the board. */
218 for (i = 0; i < 7; i++)
219 if (addrmap[i] == dev->mem_start)
223 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
227 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
228 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
230 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
231 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
234 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
235 * the card mem within the region covered by `normal' RAM !!!
237 if (dev->mem_start > 1024*1024) { /* phys addr > 1MB */
238 if (dev->mem_start < virt_to_phys(high_memory)) {
239 printk(KERN_CRIT "ac3200.c: Card RAM overlaps with normal memory!!!\n");
240 printk(KERN_CRIT "ac3200.c: Use EISA SCU to set card memory below 1MB,\n");
241 printk(KERN_CRIT "ac3200.c: or to an address above 0x%lx.\n", virt_to_phys(high_memory));
242 printk(KERN_CRIT "ac3200.c: Driver NOT installed.\n");
246 dev->mem_start = (unsigned long)ioremap(dev->mem_start, AC_STOP_PG*0x100);
247 if (dev->mem_start == 0) {
248 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
249 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
250 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
254 ei_status.reg0 = 1; /* Use as remap flag */
255 printk("ac3200.c: remapped %dkB card memory to virtual address %#lx\n",
256 AC_STOP_PG/4, dev->mem_start);
259 ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
260 dev->mem_end = ei_status.rmem_end = dev->mem_start
261 + (AC_STOP_PG - AC_START_PG)*256;
263 ei_status.name = "AC3200";
264 ei_status.tx_start_page = AC_START_PG;
265 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
266 ei_status.stop_page = AC_STOP_PG;
267 ei_status.word16 = 1;
272 ei_status.reset_8390 = &ac_reset_8390;
273 ei_status.block_input = &ac_block_input;
274 ei_status.block_output = &ac_block_output;
275 ei_status.get_8390_hdr = &ac_get_8390_hdr;
277 dev->open = &ac_open;
278 dev->stop = &ac_close_card;
279 #ifdef CONFIG_NET_POLL_CONTROLLER
280 dev->poll_controller = ei_poll;
285 free_irq(dev->irq, dev);
287 release_region(ioaddr, AC_IO_EXTENT);
291 static int ac_open(struct net_device *dev)
294 /* Someday we may enable the IRQ and shared memory here. */
295 int ioaddr = dev->base_addr;
302 static void ac_reset_8390(struct net_device *dev)
304 ushort ioaddr = dev->base_addr;
306 outb(AC_RESET, ioaddr + AC_RESET_PORT);
307 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
310 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
311 if (ei_debug > 1) printk("reset done\n");
316 /* Grab the 8390 specific header. Similar to the block_input routine, but
317 we don't need to be concerned with ring wrap as the header will be at
318 the start of a page, so we optimize accordingly. */
321 ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
323 unsigned long hdr_start = dev->mem_start + ((ring_page - AC_START_PG)<<8);
324 isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
327 /* Block input and output are easy on shared memory ethercards, the only
328 complication is when the ring buffer wraps. */
330 static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
333 unsigned long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8);
335 if (xfer_start + count > ei_status.rmem_end) {
336 /* We must wrap the input move. */
337 int semi_count = ei_status.rmem_end - xfer_start;
338 isa_memcpy_fromio(skb->data, xfer_start, semi_count);
340 isa_memcpy_fromio(skb->data + semi_count, ei_status.rmem_start, count);
342 /* Packet is in one chunk -- we can copy + cksum. */
343 isa_eth_io_copy_and_sum(skb, xfer_start, count, 0);
347 static void ac_block_output(struct net_device *dev, int count,
348 const unsigned char *buf, int start_page)
350 unsigned long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
352 isa_memcpy_toio(shmem, buf, count);
355 static int ac_close_card(struct net_device *dev)
358 printk("%s: Shutting down ethercard.\n", dev->name);
361 /* We should someday disable shared memory and interrupts. */
362 outb(0x00, ioaddr + 6); /* Disable interrupts. */
363 free_irq(dev->irq, dev);
371 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
372 static struct net_device *dev_ac32[MAX_AC32_CARDS];
373 static int io[MAX_AC32_CARDS];
374 static int irq[MAX_AC32_CARDS];
375 static int mem[MAX_AC32_CARDS];
376 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
377 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
378 MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
379 MODULE_PARM_DESC(io, "I/O base address(es)");
380 MODULE_PARM_DESC(irq, "IRQ number(s)");
381 MODULE_PARM_DESC(mem, "Memory base address(es)");
382 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
383 MODULE_LICENSE("GPL");
388 struct net_device *dev;
389 int this_dev, found = 0;
391 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
392 if (io[this_dev] == 0 && this_dev != 0)
394 dev = alloc_ei_netdev();
397 dev->irq = irq[this_dev];
398 dev->base_addr = io[this_dev];
399 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
400 if (do_ac3200_probe(dev) == 0) {
401 if (register_netdev(dev) == 0) {
402 dev_ac32[found++] = dev;
408 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
421 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
422 struct net_device *dev = dev_ac32[this_dev];
424 unregister_netdev(dev);