1 /* hp.c: A HP LAN ethernet driver for linux. */
3 Written 1993-94 by Donald Becker.
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
16 This is a driver for the HP PC-LAN adaptors.
19 The Crynwr packet driver.
22 static const char version
[] =
23 "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/ioport.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/init.h>
33 #include <linux/delay.h>
35 #include <asm/system.h>
42 /* A zero-terminated list of I/O addresses to be probed. */
43 static unsigned int hppclan_portlist
[] __initdata
=
44 { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
46 #define HP_IO_EXTENT 32
48 #define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
50 #define HP_CONFIGURE 0x08 /* Configuration register. */
51 #define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
52 #define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
53 #define HP_DATAON 0x10 /* Turn on dataport */
54 #define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
56 #define HP_START_PG 0x00 /* First page of TX buffer */
57 #define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
58 #define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
60 static int hp_probe1(struct net_device
*dev
, int ioaddr
);
62 static void hp_reset_8390(struct net_device
*dev
);
63 static void hp_get_8390_hdr(struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
,
65 static void hp_block_input(struct net_device
*dev
, int count
,
66 struct sk_buff
*skb
, int ring_offset
);
67 static void hp_block_output(struct net_device
*dev
, int count
,
68 const unsigned char *buf
, int start_page
);
70 static void hp_init_card(struct net_device
*dev
);
72 /* The map from IRQ number to HP_CONFIGURE register setting. */
73 /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
74 static char irqmap
[16] __initdata
= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
77 /* Probe for an HP LAN adaptor.
78 Also initialize the card and fill in STATION_ADDR with the station
81 static int __init
do_hp_probe(struct net_device
*dev
)
84 int base_addr
= dev
->base_addr
;
87 if (base_addr
> 0x1ff) /* Check a single specified location. */
88 return hp_probe1(dev
, base_addr
);
89 else if (base_addr
!= 0) /* Don't probe at all. */
92 for (i
= 0; hppclan_portlist
[i
]; i
++) {
93 if (hp_probe1(dev
, hppclan_portlist
[i
]) == 0)
102 struct net_device
* __init
hp_probe(int unit
)
104 struct net_device
*dev
= alloc_eip_netdev();
108 return ERR_PTR(-ENOMEM
);
110 sprintf(dev
->name
, "eth%d", unit
);
111 netdev_boot_setup_check(dev
);
113 err
= do_hp_probe(dev
);
123 static int __init
hp_probe1(struct net_device
*dev
, int ioaddr
)
125 int i
, retval
, board_id
, wordmode
;
127 static unsigned version_printed
;
129 if (!request_region(ioaddr
, HP_IO_EXTENT
, DRV_NAME
))
132 /* Check for the HP physical address, 08 00 09 xx xx xx. */
133 /* This really isn't good enough: we may pick up HP LANCE boards
134 also! Avoid the lance 0x5757 signature. */
135 if (inb(ioaddr
) != 0x08
136 || inb(ioaddr
+1) != 0x00
137 || inb(ioaddr
+2) != 0x09
138 || inb(ioaddr
+14) == 0x57) {
143 /* Set up the parameters based on the board ID.
144 If you have additional mappings, please mail them to me -djb. */
145 if ((board_id
= inb(ioaddr
+ HP_ID
)) & 0x80) {
153 if (ei_debug
&& version_printed
++ == 0)
156 printk("%s: %s (ID %02x) at %#3x,", dev
->name
, name
, board_id
, ioaddr
);
158 for(i
= 0; i
< ETHER_ADDR_LEN
; i
++)
159 dev
->dev_addr
[i
] = inb(ioaddr
+ i
);
161 printk(" %pM", dev
->dev_addr
);
163 /* Snarf the interrupt now. Someday this could be moved to open(). */
165 int irq_16list
[] = { 11, 10, 5, 3, 4, 7, 9, 0};
166 int irq_8list
[] = { 7, 5, 3, 4, 9, 0};
167 int *irqp
= wordmode
? irq_16list
: irq_8list
;
170 if (request_irq (irq
, NULL
, 0, "bogus", NULL
) != -EBUSY
) {
171 unsigned long cookie
= probe_irq_on();
172 /* Twinkle the interrupt, and check if it's seen. */
173 outb_p(irqmap
[irq
] | HP_RUN
, ioaddr
+ HP_CONFIGURE
);
174 outb_p( 0x00 | HP_RUN
, ioaddr
+ HP_CONFIGURE
);
175 if (irq
== probe_irq_off(cookie
) /* It's a good IRQ line! */
176 && request_irq (irq
, eip_interrupt
, 0, DRV_NAME
, dev
) == 0) {
177 printk(" selecting IRQ %d.\n", irq
);
184 printk(" no free IRQ lines.\n");
191 if ((retval
= request_irq(dev
->irq
, eip_interrupt
, 0, DRV_NAME
, dev
))) {
192 printk (" unable to get IRQ %d.\n", dev
->irq
);
197 /* Set the base address to point to the NIC, not the "real" base! */
198 dev
->base_addr
= ioaddr
+ NIC_OFFSET
;
199 dev
->netdev_ops
= &eip_netdev_ops
;
201 ei_status
.name
= name
;
202 ei_status
.word16
= wordmode
;
203 ei_status
.tx_start_page
= HP_START_PG
;
204 ei_status
.rx_start_page
= HP_START_PG
+ TX_PAGES
;
205 ei_status
.stop_page
= wordmode
? HP_16BSTOP_PG
: HP_8BSTOP_PG
;
207 ei_status
.reset_8390
= &hp_reset_8390
;
208 ei_status
.get_8390_hdr
= &hp_get_8390_hdr
;
209 ei_status
.block_input
= &hp_block_input
;
210 ei_status
.block_output
= &hp_block_output
;
213 retval
= register_netdev(dev
);
218 free_irq(dev
->irq
, dev
);
220 release_region(ioaddr
, HP_IO_EXTENT
);
225 hp_reset_8390(struct net_device
*dev
)
227 int hp_base
= dev
->base_addr
- NIC_OFFSET
;
228 int saved_config
= inb_p(hp_base
+ HP_CONFIGURE
);
230 if (ei_debug
> 1) printk("resetting the 8390 time=%ld...", jiffies
);
231 outb_p(0x00, hp_base
+ HP_CONFIGURE
);
233 /* Pause just a few cycles for the hardware reset to take place. */
236 outb_p(saved_config
, hp_base
+ HP_CONFIGURE
);
239 if ((inb_p(hp_base
+NIC_OFFSET
+EN0_ISR
) & ENISR_RESET
) == 0)
240 printk("%s: hp_reset_8390() did not complete.\n", dev
->name
);
242 if (ei_debug
> 1) printk("8390 reset done (%ld).", jiffies
);
247 hp_get_8390_hdr(struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
, int ring_page
)
249 int nic_base
= dev
->base_addr
;
250 int saved_config
= inb_p(nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
252 outb_p(saved_config
| HP_DATAON
, nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
253 outb_p(E8390_NODMA
+E8390_PAGE0
+E8390_START
, nic_base
);
254 outb_p(sizeof(struct e8390_pkt_hdr
), nic_base
+ EN0_RCNTLO
);
255 outb_p(0, nic_base
+ EN0_RCNTHI
);
256 outb_p(0, nic_base
+ EN0_RSARLO
); /* On page boundary */
257 outb_p(ring_page
, nic_base
+ EN0_RSARHI
);
258 outb_p(E8390_RREAD
+E8390_START
, nic_base
);
260 if (ei_status
.word16
)
261 insw(nic_base
- NIC_OFFSET
+ HP_DATAPORT
, hdr
, sizeof(struct e8390_pkt_hdr
)>>1);
263 insb(nic_base
- NIC_OFFSET
+ HP_DATAPORT
, hdr
, sizeof(struct e8390_pkt_hdr
));
265 outb_p(saved_config
& (~HP_DATAON
), nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
268 /* Block input and output, similar to the Crynwr packet driver. If you are
269 porting to a new ethercard look at the packet driver source for hints.
270 The HP LAN doesn't use shared memory -- we put the packet
271 out through the "remote DMA" dataport. */
274 hp_block_input(struct net_device
*dev
, int count
, struct sk_buff
*skb
, int ring_offset
)
276 int nic_base
= dev
->base_addr
;
277 int saved_config
= inb_p(nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
278 int xfer_count
= count
;
279 char *buf
= skb
->data
;
281 outb_p(saved_config
| HP_DATAON
, nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
282 outb_p(E8390_NODMA
+E8390_PAGE0
+E8390_START
, nic_base
);
283 outb_p(count
& 0xff, nic_base
+ EN0_RCNTLO
);
284 outb_p(count
>> 8, nic_base
+ EN0_RCNTHI
);
285 outb_p(ring_offset
& 0xff, nic_base
+ EN0_RSARLO
);
286 outb_p(ring_offset
>> 8, nic_base
+ EN0_RSARHI
);
287 outb_p(E8390_RREAD
+E8390_START
, nic_base
);
288 if (ei_status
.word16
) {
289 insw(nic_base
- NIC_OFFSET
+ HP_DATAPORT
,buf
,count
>>1);
291 buf
[count
-1] = inb(nic_base
- NIC_OFFSET
+ HP_DATAPORT
), xfer_count
++;
293 insb(nic_base
- NIC_OFFSET
+ HP_DATAPORT
, buf
, count
);
295 /* This is for the ALPHA version only, remove for later releases. */
296 if (ei_debug
> 0) { /* DMA termination address check... */
297 int high
= inb_p(nic_base
+ EN0_RSARHI
);
298 int low
= inb_p(nic_base
+ EN0_RSARLO
);
299 int addr
= (high
<< 8) + low
;
300 /* Check only the lower 8 bits so we can ignore ring wrap. */
301 if (((ring_offset
+ xfer_count
) & 0xff) != (addr
& 0xff))
302 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
303 dev
->name
, ring_offset
+ xfer_count
, addr
);
305 outb_p(saved_config
& (~HP_DATAON
), nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
309 hp_block_output(struct net_device
*dev
, int count
,
310 const unsigned char *buf
, int start_page
)
312 int nic_base
= dev
->base_addr
;
313 int saved_config
= inb_p(nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
315 outb_p(saved_config
| HP_DATAON
, nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
316 /* Round the count up for word writes. Do we need to do this?
317 What effect will an odd byte count have on the 8390?
318 I should check someday. */
319 if (ei_status
.word16
&& (count
& 0x01))
321 /* We should already be in page 0, but to be safe... */
322 outb_p(E8390_PAGE0
+E8390_START
+E8390_NODMA
, nic_base
);
324 #ifdef NE8390_RW_BUGFIX
325 /* Handle the read-before-write bug the same way as the
326 Crynwr packet driver -- the NatSemi method doesn't work. */
327 outb_p(0x42, nic_base
+ EN0_RCNTLO
);
328 outb_p(0, nic_base
+ EN0_RCNTHI
);
329 outb_p(0xff, nic_base
+ EN0_RSARLO
);
330 outb_p(0x00, nic_base
+ EN0_RSARHI
);
332 outb_p(E8390_RREAD
+E8390_START
, nic_base
+ NE_CMD
);
333 /* Make certain that the dummy read has occurred. */
338 outb_p(count
& 0xff, nic_base
+ EN0_RCNTLO
);
339 outb_p(count
>> 8, nic_base
+ EN0_RCNTHI
);
340 outb_p(0x00, nic_base
+ EN0_RSARLO
);
341 outb_p(start_page
, nic_base
+ EN0_RSARHI
);
343 outb_p(E8390_RWRITE
+E8390_START
, nic_base
);
344 if (ei_status
.word16
) {
345 /* Use the 'rep' sequence for 16 bit boards. */
346 outsw(nic_base
- NIC_OFFSET
+ HP_DATAPORT
, buf
, count
>>1);
348 outsb(nic_base
- NIC_OFFSET
+ HP_DATAPORT
, buf
, count
);
351 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
353 /* This is for the ALPHA version only, remove for later releases. */
354 if (ei_debug
> 0) { /* DMA termination address check... */
355 int high
= inb_p(nic_base
+ EN0_RSARHI
);
356 int low
= inb_p(nic_base
+ EN0_RSARLO
);
357 int addr
= (high
<< 8) + low
;
358 if ((start_page
<< 8) + count
!= addr
)
359 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
360 dev
->name
, (start_page
<< 8) + count
, addr
);
362 outb_p(saved_config
& (~HP_DATAON
), nic_base
- NIC_OFFSET
+ HP_CONFIGURE
);
366 /* This function resets the ethercard if something screws up. */
368 hp_init_card(struct net_device
*dev
)
371 NS8390p_init(dev
, 0);
372 outb_p(irqmap
[irq
&0x0f] | HP_RUN
,
373 dev
->base_addr
- NIC_OFFSET
+ HP_CONFIGURE
);
378 #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
379 static struct net_device
*dev_hp
[MAX_HP_CARDS
];
380 static int io
[MAX_HP_CARDS
];
381 static int irq
[MAX_HP_CARDS
];
383 module_param_array(io
, int, NULL
, 0);
384 module_param_array(irq
, int, NULL
, 0);
385 MODULE_PARM_DESC(io
, "I/O base address(es)");
386 MODULE_PARM_DESC(irq
, "IRQ number(s) (assigned)");
387 MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
388 MODULE_LICENSE("GPL");
390 /* This is set up so that only a single autoprobe takes place per call.
391 ISA device autoprobes on a running machine are not recommended. */
395 struct net_device
*dev
;
396 int this_dev
, found
= 0;
398 for (this_dev
= 0; this_dev
< MAX_HP_CARDS
; this_dev
++) {
399 if (io
[this_dev
] == 0) {
400 if (this_dev
!= 0) break; /* only autoprobe 1st one */
401 printk(KERN_NOTICE
"hp.c: Presently autoprobing (not recommended) for a single card.\n");
403 dev
= alloc_eip_netdev();
406 dev
->irq
= irq
[this_dev
];
407 dev
->base_addr
= io
[this_dev
];
408 if (do_hp_probe(dev
) == 0) {
409 dev_hp
[found
++] = dev
;
413 printk(KERN_WARNING
"hp.c: No HP card found (i/o = 0x%x).\n", io
[this_dev
]);
421 static void cleanup_card(struct net_device
*dev
)
423 free_irq(dev
->irq
, dev
);
424 release_region(dev
->base_addr
- NIC_OFFSET
, HP_IO_EXTENT
);
432 for (this_dev
= 0; this_dev
< MAX_HP_CARDS
; this_dev
++) {
433 struct net_device
*dev
= dev_hp
[this_dev
];
435 unregister_netdev(dev
);
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