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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
;
127 struct net_device
* __init
ac3200_probe(int unit
)
129 struct net_device
*dev
= alloc_ei_netdev();
133 return ERR_PTR(-ENOMEM
);
135 sprintf(dev
->name
, "eth%d", unit
);
136 netdev_boot_setup_check(dev
);
138 err
= do_ac3200_probe(dev
);
148 static int __init
ac_probe1(int ioaddr
, struct net_device
*dev
)
152 if (!request_region(ioaddr
, AC_IO_EXTENT
, DRV_NAME
))
155 if (inb_p(ioaddr
+ AC_ID_PORT
) == 0xff) {
160 if (inl(ioaddr
+ AC_ID_PORT
) != AC_EISA_ID
) {
165 #ifndef final_version
166 printk(KERN_DEBUG
"AC3200 ethercard configuration register is %#02x,"
167 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr
+ AC_CONFIG
),
168 inb(ioaddr
+ AC_ID_PORT
+ 0), inb(ioaddr
+ AC_ID_PORT
+ 1),
169 inb(ioaddr
+ AC_ID_PORT
+ 2), inb(ioaddr
+ AC_ID_PORT
+ 3));
172 printk("AC3200 in EISA slot %d, node", ioaddr
/0x1000);
173 for(i
= 0; i
< 6; i
++)
174 printk(" %02x", dev
->dev_addr
[i
] = inb(ioaddr
+ AC_SA_PROM
+ i
));
177 /* Check the vendor ID/prefix. Redundant after checking the EISA ID */
178 if (inb(ioaddr
+ AC_SA_PROM
+ 0) != AC_ADDR0
179 || inb(ioaddr
+ AC_SA_PROM
+ 1) != AC_ADDR1
180 || inb(ioaddr
+ AC_SA_PROM
+ 2) != AC_ADDR2
) {
181 printk(", not found (invalid prefix).\n");
187 /* Assign and allocate the interrupt now. */
189 dev
->irq
= config2irq(inb(ioaddr
+ AC_CONFIG
));
192 dev
->irq
= irq_canonicalize(dev
->irq
);
193 printk(", assigning");
196 retval
= request_irq(dev
->irq
, ei_interrupt
, 0, DRV_NAME
, dev
);
198 printk (" nothing! Unable to get IRQ %d.\n", dev
->irq
);
202 printk(" IRQ %d, %s port\n", dev
->irq
, port_name
[dev
->if_port
]);
204 dev
->base_addr
= ioaddr
;
207 if (dev
->mem_start
) { /* Override the value from the board. */
208 for (i
= 0; i
< 7; i
++)
209 if (addrmap
[i
] == dev
->mem_start
)
213 outb((inb(ioaddr
+ AC_CONFIG
) & ~7) | i
, ioaddr
+ AC_CONFIG
);
217 dev
->if_port
= inb(ioaddr
+ AC_CONFIG
) >> 6;
218 dev
->mem_start
= config2mem(inb(ioaddr
+ AC_CONFIG
));
220 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n",
221 dev
->name
, ioaddr
, AC_STOP_PG
/4, dev
->mem_start
);
224 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
225 * the card mem within the region covered by `normal' RAM !!!
227 * ioremap() will fail in that case.
229 ei_status
.mem
= ioremap(dev
->mem_start
, AC_STOP_PG
*0x100);
230 if (!ei_status
.mem
) {
231 printk(KERN_ERR
"ac3200.c: Unable to remap card memory above 1MB !!\n");
232 printk(KERN_ERR
"ac3200.c: Try using EISA SCU to set memory below 1MB.\n");
233 printk(KERN_ERR
"ac3200.c: Driver NOT installed.\n");
237 printk("ac3200.c: remapped %dkB card memory to virtual address %p\n",
238 AC_STOP_PG
/4, ei_status
.mem
);
240 dev
->mem_start
= (unsigned long)ei_status
.mem
;
241 dev
->mem_end
= dev
->mem_start
+ (AC_STOP_PG
- AC_START_PG
)*256;
243 ei_status
.name
= "AC3200";
244 ei_status
.tx_start_page
= AC_START_PG
;
245 ei_status
.rx_start_page
= AC_START_PG
+ TX_PAGES
;
246 ei_status
.stop_page
= AC_STOP_PG
;
247 ei_status
.word16
= 1;
252 ei_status
.reset_8390
= &ac_reset_8390
;
253 ei_status
.block_input
= &ac_block_input
;
254 ei_status
.block_output
= &ac_block_output
;
255 ei_status
.get_8390_hdr
= &ac_get_8390_hdr
;
257 dev
->open
= &ac_open
;
258 dev
->stop
= &ac_close_card
;
259 #ifdef CONFIG_NET_POLL_CONTROLLER
260 dev
->poll_controller
= ei_poll
;
264 retval
= register_netdev(dev
);
270 iounmap(ei_status
.mem
);
272 free_irq(dev
->irq
, dev
);
274 release_region(ioaddr
, AC_IO_EXTENT
);
278 static int ac_open(struct net_device
*dev
)
281 /* Someday we may enable the IRQ and shared memory here. */
282 int ioaddr
= dev
->base_addr
;
289 static void ac_reset_8390(struct net_device
*dev
)
291 ushort ioaddr
= dev
->base_addr
;
293 outb(AC_RESET
, ioaddr
+ AC_RESET_PORT
);
294 if (ei_debug
> 1) printk("resetting AC3200, t=%ld...", jiffies
);
297 outb(AC_ENABLE
, ioaddr
+ AC_RESET_PORT
);
298 if (ei_debug
> 1) printk("reset done\n");
303 /* Grab the 8390 specific header. Similar to the block_input routine, but
304 we don't need to be concerned with ring wrap as the header will be at
305 the start of a page, so we optimize accordingly. */
308 ac_get_8390_hdr(struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
, int ring_page
)
310 void __iomem
*hdr_start
= ei_status
.mem
+ ((ring_page
- AC_START_PG
)<<8);
311 memcpy_fromio(hdr
, hdr_start
, sizeof(struct e8390_pkt_hdr
));
314 /* Block input and output are easy on shared memory ethercards, the only
315 complication is when the ring buffer wraps. */
317 static void ac_block_input(struct net_device
*dev
, int count
, struct sk_buff
*skb
,
320 void __iomem
*start
= ei_status
.mem
+ ring_offset
- AC_START_PG
*256;
322 if (ring_offset
+ count
> AC_STOP_PG
*256) {
323 /* We must wrap the input move. */
324 int semi_count
= AC_STOP_PG
*256 - ring_offset
;
325 memcpy_fromio(skb
->data
, start
, semi_count
);
327 memcpy_fromio(skb
->data
+ semi_count
,
328 ei_status
.mem
+ TX_PAGES
*256, count
);
330 /* Packet is in one chunk -- we can copy + cksum. */
331 eth_io_copy_and_sum(skb
, start
, count
, 0);
335 static void ac_block_output(struct net_device
*dev
, int count
,
336 const unsigned char *buf
, int start_page
)
338 void __iomem
*shmem
= ei_status
.mem
+ ((start_page
- AC_START_PG
)<<8);
340 memcpy_toio(shmem
, buf
, count
);
343 static int ac_close_card(struct net_device
*dev
)
346 printk("%s: Shutting down ethercard.\n", dev
->name
);
349 /* We should someday disable shared memory and interrupts. */
350 outb(0x00, ioaddr
+ 6); /* Disable interrupts. */
351 free_irq(dev
->irq
, dev
);
359 #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */
360 static struct net_device
*dev_ac32
[MAX_AC32_CARDS
];
361 static int io
[MAX_AC32_CARDS
];
362 static int irq
[MAX_AC32_CARDS
];
363 static int mem
[MAX_AC32_CARDS
];
364 module_param_array(io
, int, NULL
, 0);
365 module_param_array(irq
, int, NULL
, 0);
366 module_param_array(mem
, int, NULL
, 0);
367 MODULE_PARM_DESC(io
, "I/O base address(es)");
368 MODULE_PARM_DESC(irq
, "IRQ number(s)");
369 MODULE_PARM_DESC(mem
, "Memory base address(es)");
370 MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver");
371 MODULE_LICENSE("GPL");
376 struct net_device
*dev
;
377 int this_dev
, found
= 0;
379 for (this_dev
= 0; this_dev
< MAX_AC32_CARDS
; this_dev
++) {
380 if (io
[this_dev
] == 0 && this_dev
!= 0)
382 dev
= alloc_ei_netdev();
385 dev
->irq
= irq
[this_dev
];
386 dev
->base_addr
= io
[this_dev
];
387 dev
->mem_start
= mem
[this_dev
]; /* Currently ignored by driver */
388 if (do_ac3200_probe(dev
) == 0) {
389 dev_ac32
[found
++] = dev
;
393 printk(KERN_WARNING
"ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io
[this_dev
]);
401 static void cleanup_card(struct net_device
*dev
)
403 /* Someday free_irq may be in ac_close_card() */
404 free_irq(dev
->irq
, dev
);
405 release_region(dev
->base_addr
, AC_IO_EXTENT
);
406 iounmap(ei_status
.mem
);
414 for (this_dev
= 0; this_dev
< MAX_AC32_CARDS
; this_dev
++) {
415 struct net_device
*dev
= dev_ac32
[this_dev
];
417 unregister_netdev(dev
);