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>
29 #include <linux/kernel.h>
30 #include <linux/sched.h>
31 #include <linux/errno.h>
32 #include <linux/string.h>
33 #include <linux/netdevice.h>
34 #include <linux/etherdevice.h>
35 #include <linux/init.h>
37 #include <asm/system.h>
43 /* Offsets from the base address. */
44 #define AC_NIC_BASE 0x00
45 #define AC_SA_PROM 0x16 /* The station address PROM. */
46 #define AC_ADDR0 0x00 /* Prefix station address values. */
49 #define AC_ID_PORT 0xC80
50 #define AC_EISA_ID 0x0110d305
51 #define AC_RESET_PORT 0xC84
53 #define AC_ENABLE 0x01
54 #define AC_CONFIG 0xC90 /* The configuration port. */
56 #define AC_IO_EXTENT 0x20
57 /* Actually accessed is:
65 /* Decoding of the configuration register. */
66 static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
67 static int addrmap[8] =
68 {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 };
69 static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"};
71 #define config2irq(configval) config2irqmap[((configval) >> 3) & 7]
72 #define config2mem(configval) addrmap[(configval) & 7]
73 #define config2name(configval) port_name[((configval) >> 6) & 3]
75 /* First and last 8390 pages. */
76 #define AC_START_PG 0x00 /* First page of 8390 TX buffer */
77 #define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */
79 int ac3200_probe(struct net_device *dev);
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 int __init ac3200_probe(struct net_device *dev)
102 unsigned short ioaddr = dev->base_addr;
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)
121 static int __init ac_probe1(int ioaddr, struct net_device *dev)
125 if (!request_region(ioaddr, AC_IO_EXTENT, dev->name))
128 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
133 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
138 #ifndef final_version
139 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
140 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
141 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
142 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
145 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
146 for(i = 0; i < 6; i++)
147 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
150 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
151 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
152 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
153 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
154 printk(", not found (invalid prefix).\n");
160 /* Allocate dev->priv and fill in 8390 specific dev fields. */
161 if (ethdev_init(dev)) {
162 printk (", unable to allocate memory for dev->priv.\n");
167 /* Assign and allocate the interrupt now. */
169 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
172 dev->irq = irq_cannonicalize(dev->irq);
173 printk(", assigning");
176 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
178 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
182 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
184 dev->base_addr = ioaddr;
187 if (dev->mem_start) { /* Override the value from the board. */
188 for (i = 0; i < 7; i++)
189 if (addrmap[i] == dev->mem_start)
193 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
197 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
198 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
200 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
201 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
204 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
205 * the card mem within the region covered by `normal' RAM !!!
207 if (dev->mem_start > 1024*1024) { /* phys addr > 1MB */
208 if (dev->mem_start < virt_to_bus(high_memory)) {
209 printk(KERN_CRIT "ac3200.c: Card RAM overlaps with normal memory!!!\n");
210 printk(KERN_CRIT "ac3200.c: Use EISA SCU to set card memory below 1MB,\n");
211 printk(KERN_CRIT "ac3200.c: or to an address above 0x%lx.\n", virt_to_bus(high_memory));
212 printk(KERN_CRIT "ac3200.c: Driver NOT installed.\n");
216 dev->mem_start = (unsigned long)ioremap(dev->mem_start, AC_STOP_PG*0x100);
217 if (dev->mem_start == 0) {
218 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
219 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
220 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
224 ei_status.reg0 = 1; /* Use as remap flag */
225 printk("ac3200.c: remapped %dkB card memory to virtual address %#lx\n",
226 AC_STOP_PG/4, dev->mem_start);
229 dev->rmem_start = dev->mem_start + TX_PAGES*256;
230 dev->mem_end = dev->rmem_end = dev->mem_start
231 + (AC_STOP_PG - AC_START_PG)*256;
233 ei_status.name = "AC3200";
234 ei_status.tx_start_page = AC_START_PG;
235 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
236 ei_status.stop_page = AC_STOP_PG;
237 ei_status.word16 = 1;
242 ei_status.reset_8390 = &ac_reset_8390;
243 ei_status.block_input = &ac_block_input;
244 ei_status.block_output = &ac_block_output;
245 ei_status.get_8390_hdr = &ac_get_8390_hdr;
247 dev->open = &ac_open;
248 dev->stop = &ac_close_card;
252 free_irq(dev->irq, dev);
257 release_region(ioaddr, AC_IO_EXTENT);
261 static int ac_open(struct net_device *dev)
264 /* Someday we may enable the IRQ and shared memory here. */
265 int ioaddr = dev->base_addr;
272 static void ac_reset_8390(struct net_device *dev)
274 ushort ioaddr = dev->base_addr;
276 outb(AC_RESET, ioaddr + AC_RESET_PORT);
277 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
280 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
281 if (ei_debug > 1) printk("reset done\n");
286 /* Grab the 8390 specific header. Similar to the block_input routine, but
287 we don't need to be concerned with ring wrap as the header will be at
288 the start of a page, so we optimize accordingly. */
291 ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
293 unsigned long hdr_start = dev->mem_start + ((ring_page - AC_START_PG)<<8);
294 isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
297 /* Block input and output are easy on shared memory ethercards, the only
298 complication is when the ring buffer wraps. */
300 static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
303 unsigned long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8);
305 if (xfer_start + count > dev->rmem_end) {
306 /* We must wrap the input move. */
307 int semi_count = dev->rmem_end - xfer_start;
308 isa_memcpy_fromio(skb->data, xfer_start, semi_count);
310 isa_memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
312 /* Packet is in one chunk -- we can copy + cksum. */
313 isa_eth_io_copy_and_sum(skb, xfer_start, count, 0);
317 static void ac_block_output(struct net_device *dev, int count,
318 const unsigned char *buf, int start_page)
320 unsigned long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8);
322 isa_memcpy_toio(shmem, buf, count);
325 static int ac_close_card(struct net_device *dev)
328 printk("%s: Shutting down ethercard.\n", dev->name);
331 /* We should someday disable shared memory and interrupts. */
332 outb(0x00, ioaddr + 6); /* Disable interrupts. */
333 free_irq(dev->irq, dev);
341 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
342 static struct net_device dev_ac32[MAX_AC32_CARDS];
343 static int io[MAX_AC32_CARDS];
344 static int irq[MAX_AC32_CARDS];
345 static int mem[MAX_AC32_CARDS];
346 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
347 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
348 MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i");
349 MODULE_PARM_DESC(io, "I/O base adress(es)");
350 MODULE_PARM_DESC(irq, "IRQ number(s)");
351 MODULE_PARM_DESC(mem, "Memory base address(es)");
352 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
353 MODULE_LICENSE("GPL");
358 int this_dev, found = 0;
360 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
361 struct net_device *dev = &dev_ac32[this_dev];
362 dev->irq = irq[this_dev];
363 dev->base_addr = io[this_dev];
364 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
365 dev->init = ac3200_probe;
366 /* Default is to only install one card. */
367 if (io[this_dev] == 0 && this_dev != 0) break;
368 if (register_netdev(dev) != 0) {
369 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
370 if (found != 0) { /* Got at least one. */
385 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
386 struct net_device *dev = &dev_ac32[this_dev];
387 if (dev->priv != NULL) {
388 /* Someday free_irq may be in ac_close_card() */
389 free_irq(dev->irq, dev);
390 release_region(dev->base_addr, AC_IO_EXTENT);
392 iounmap((void *)dev->mem_start);
393 unregister_netdev(dev);
404 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c ac3200.c"
406 * kept-new-versions: 5