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 int __init ac_probe1(int ioaddr, struct net_device *dev)
150 if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME))
153 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) {
158 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) {
163 #ifndef final_version
164 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x,"
165 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG),
166 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1),
167 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3));
170 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000);
171 for(i = 0; i < 6; i++)
172 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i));
175 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
176 if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0
177 || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1
178 || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) {
179 printk(", not found (invalid prefix).\n");
185 /* Assign and allocate the interrupt now. */
187 dev->irq = config2irq(inb(ioaddr + AC_CONFIG));
190 dev->irq = irq_canonicalize(dev->irq);
191 printk(", assigning");
194 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
196 printk (" nothing! Unable to get IRQ %d.\n", dev->irq);
200 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]);
202 dev->base_addr = ioaddr;
205 if (dev->mem_start) { /* Override the value from the board. */
206 for (i = 0; i < 7; i++)
207 if (addrmap[i] == dev->mem_start)
211 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG);
215 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6;
216 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG));
218 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
219 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start);
222 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
223 * the card mem within the region covered by `normal' RAM !!!
225 * ioremap() will fail in that case.
227 ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100);
228 if (!ei_status.mem) {
229 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n");
230 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
231 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n");
235 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
236 AC_STOP_PG/4, ei_status.mem);
238 dev->mem_start = (unsigned long)ei_status.mem;
239 dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256;
241 ei_status.name = "AC3200";
242 ei_status.tx_start_page = AC_START_PG;
243 ei_status.rx_start_page = AC_START_PG + TX_PAGES;
244 ei_status.stop_page = AC_STOP_PG;
245 ei_status.word16 = 1;
250 ei_status.reset_8390 = &ac_reset_8390;
251 ei_status.block_input = &ac_block_input;
252 ei_status.block_output = &ac_block_output;
253 ei_status.get_8390_hdr = &ac_get_8390_hdr;
255 dev->open = &ac_open;
256 dev->stop = &ac_close_card;
257 #ifdef CONFIG_NET_POLL_CONTROLLER
258 dev->poll_controller = ei_poll;
262 retval = register_netdev(dev);
268 iounmap(ei_status.mem);
270 free_irq(dev->irq, dev);
272 release_region(ioaddr, AC_IO_EXTENT);
276 static int ac_open(struct net_device *dev)
279 /* Someday we may enable the IRQ and shared memory here. */
280 int ioaddr = dev->base_addr;
287 static void ac_reset_8390(struct net_device *dev)
289 ushort ioaddr = dev->base_addr;
291 outb(AC_RESET, ioaddr + AC_RESET_PORT);
292 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies);
295 outb(AC_ENABLE, ioaddr + AC_RESET_PORT);
296 if (ei_debug > 1) printk("reset done\n");
301 /* Grab the 8390 specific header. Similar to the block_input routine, but
302 we don't need to be concerned with ring wrap as the header will be at
303 the start of a page, so we optimize accordingly. */
306 ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
308 void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8);
309 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
312 /* Block input and output are easy on shared memory ethercards, the only
313 complication is when the ring buffer wraps. */
315 static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb,
318 void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256;
320 if (ring_offset + count > AC_STOP_PG*256) {
321 /* We must wrap the input move. */
322 int semi_count = AC_STOP_PG*256 - ring_offset;
323 memcpy_fromio(skb->data, start, semi_count);
325 memcpy_fromio(skb->data + semi_count,
326 ei_status.mem + TX_PAGES*256, count);
328 memcpy_fromio(skb->data, start, count);
332 static void ac_block_output(struct net_device *dev, int count,
333 const unsigned char *buf, int start_page)
335 void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8);
337 memcpy_toio(shmem, buf, count);
340 static int ac_close_card(struct net_device *dev)
343 printk("%s: Shutting down ethercard.\n", dev->name);
346 /* We should someday disable shared memory and interrupts. */
347 outb(0x00, ioaddr + 6); /* Disable interrupts. */
348 free_irq(dev->irq, dev);
356 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
357 static struct net_device *dev_ac32[MAX_AC32_CARDS];
358 static int io[MAX_AC32_CARDS];
359 static int irq[MAX_AC32_CARDS];
360 static int mem[MAX_AC32_CARDS];
361 module_param_array(io, int, NULL, 0);
362 module_param_array(irq, int, NULL, 0);
363 module_param_array(mem, int, NULL, 0);
364 MODULE_PARM_DESC(io, "I/O base address(es)");
365 MODULE_PARM_DESC(irq, "IRQ number(s)");
366 MODULE_PARM_DESC(mem, "Memory base address(es)");
367 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
368 MODULE_LICENSE("GPL");
370 int __init init_module(void)
372 struct net_device *dev;
373 int this_dev, found = 0;
375 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
376 if (io[this_dev] == 0 && this_dev != 0)
378 dev = alloc_ei_netdev();
381 dev->irq = irq[this_dev];
382 dev->base_addr = io[this_dev];
383 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */
384 if (do_ac3200_probe(dev) == 0) {
385 dev_ac32[found++] = dev;
389 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]);
397 static void cleanup_card(struct net_device *dev)
399 /* Someday free_irq may be in ac_close_card() */
400 free_irq(dev->irq, dev);
401 release_region(dev->base_addr, AC_IO_EXTENT);
402 iounmap(ei_status.mem);
410 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) {
411 struct net_device *dev = dev_ac32[this_dev];
413 unregister_netdev(dev);