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[linux-2.6/linux-mips.git] / drivers / net / hp.c
blob68f31dd7aa95612d687cf9f978b2c3a40c35657a
1 /* hp.c: A HP LAN ethernet driver for linux. */
2 /*
3 Written 1993-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
14 Annapolis MD 21403
15
16 This is a driver for the HP PC-LAN adaptors.
17
18 Sources:
19 The Crynwr packet driver.
20 */
21
22 static const char version[] =
23 "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
24
25
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>
34
35 #include <asm/system.h>
36 #include <asm/io.h>
37
38 #include "8390.h"
39
40 /* A zero-terminated list of I/O addresses to be probed. */
41 static unsigned int hppclan_portlist[] __initdata =
42 { 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
43
44 #define HP_IO_EXTENT 32
45
46 #define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
47 #define HP_ID 0x07
48 #define HP_CONFIGURE 0x08 /* Configuration register. */
49 #define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
50 #define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
51 #define HP_DATAON 0x10 /* Turn on dataport */
52 #define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
53
54 #define HP_START_PG 0x00 /* First page of TX buffer */
55 #define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
56 #define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
57
58 int hp_probe(struct net_device *dev);
59 static int hp_probe1(struct net_device *dev, int ioaddr);
60
61 static int hp_open(struct net_device *dev);
62 static int hp_close(struct net_device *dev);
63 static void hp_reset_8390(struct net_device *dev);
64 static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
65 int ring_page);
66 static void hp_block_input(struct net_device *dev, int count,
67 struct sk_buff *skb , int ring_offset);
68 static void hp_block_output(struct net_device *dev, int count,
69 const unsigned char *buf, int start_page);
70
71 static void hp_init_card(struct net_device *dev);
72
73 /* The map from IRQ number to HP_CONFIGURE register setting. */
74 /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
75 static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
76
77 \f
78 /* Probe for an HP LAN adaptor.
79 Also initialize the card and fill in STATION_ADDR with the station
80 address. */
81
82 int __init hp_probe(struct net_device *dev)
83 {
84 int i;
85 int base_addr = dev->base_addr;
86
87 SET_MODULE_OWNER(dev);
88
89 if (base_addr > 0x1ff) /* Check a single specified location. */
90 return hp_probe1(dev, base_addr);
91 else if (base_addr != 0) /* Don't probe at all. */
92 return -ENXIO;
93
94 for (i = 0; hppclan_portlist[i]; i++)
95 if (hp_probe1(dev, hppclan_portlist[i]) == 0)
96 return 0;
97
98 return -ENODEV;
99 }
100
101 static int __init hp_probe1(struct net_device *dev, int ioaddr)
102 {
103 int i, retval, board_id, wordmode;
104 const char *name;
105 static unsigned version_printed;
106
107 if (!request_region(ioaddr, HP_IO_EXTENT, dev->name))
108 return -EBUSY;
109
110 /* Check for the HP physical address, 08 00 09 xx xx xx. */
111 /* This really isn't good enough: we may pick up HP LANCE boards
112 also! Avoid the lance 0x5757 signature. */
113 if (inb(ioaddr) != 0x08
114 || inb(ioaddr+1) != 0x00
115 || inb(ioaddr+2) != 0x09
116 || inb(ioaddr+14) == 0x57) {
117 retval = -ENODEV;
118 goto out;
119 }
120
121 /* Set up the parameters based on the board ID.
122 If you have additional mappings, please mail them to me -djb. */
123 if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
124 name = "HP27247";
125 wordmode = 1;
126 } else {
127 name = "HP27250";
128 wordmode = 0;
129 }
130
131 if (ei_debug && version_printed++ == 0)
132 printk(version);
133
134 /* Allocate dev->priv and fill in 8390 specific dev fields. */
135 if (ethdev_init(dev)) {
136 printk (" unable to get memory for dev->priv.\n");
137 retval = -ENOMEM;
138 goto out;
139 }
140
141 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
142
143 for(i = 0; i < ETHER_ADDR_LEN; i++)
144 printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
145
146 /* Snarf the interrupt now. Someday this could be moved to open(). */
147 if (dev->irq < 2) {
148 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
149 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
150 int *irqp = wordmode ? irq_16list : irq_8list;
151 do {
152 int irq = *irqp;
153 if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
154 unsigned long cookie = probe_irq_on();
155 /* Twinkle the interrupt, and check if it's seen. */
156 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
157 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
158 if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
159 && request_irq (irq, ei_interrupt, 0, dev->name, dev) == 0) {
160 printk(" selecting IRQ %d.\n", irq);
161 dev->irq = *irqp;
162 break;
163 }
164 }
165 } while (*++irqp);
166 if (*irqp == 0) {
167 printk(" no free IRQ lines.\n");
168 retval = -EBUSY;
169 goto out1;
170 }
171 } else {
172 if (dev->irq == 2)
173 dev->irq = 9;
174 if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))) {
175 printk (" unable to get IRQ %d.\n", dev->irq);
176 goto out1;
177 }
178 }
179
180 /* Set the base address to point to the NIC, not the "real" base! */
181 dev->base_addr = ioaddr + NIC_OFFSET;
182 dev->open = &hp_open;
183 dev->stop = &hp_close;
184
185 ei_status.name = name;
186 ei_status.word16 = wordmode;
187 ei_status.tx_start_page = HP_START_PG;
188 ei_status.rx_start_page = HP_START_PG + TX_PAGES;
189 ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
190
191 ei_status.reset_8390 = &hp_reset_8390;
192 ei_status.get_8390_hdr = &hp_get_8390_hdr;
193 ei_status.block_input = &hp_block_input;
194 ei_status.block_output = &hp_block_output;
195 hp_init_card(dev);
196
197 return 0;
198 out1:
199 kfree(dev->priv);
200 dev->priv = NULL;
201 out:
202 release_region(ioaddr, HP_IO_EXTENT);
203 return retval;
204 }
205
206 static int
207 hp_open(struct net_device *dev)
208 {
209 ei_open(dev);
210 return 0;
211 }
212
213 static int
214 hp_close(struct net_device *dev)
215 {
216 ei_close(dev);
217 return 0;
218 }
219
220 static void
221 hp_reset_8390(struct net_device *dev)
222 {
223 int hp_base = dev->base_addr - NIC_OFFSET;
224 int saved_config = inb_p(hp_base + HP_CONFIGURE);
225
226 if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
227 outb_p(0x00, hp_base + HP_CONFIGURE);
228 ei_status.txing = 0;
229 /* Pause just a few cycles for the hardware reset to take place. */
230 udelay(5);
231
232 outb_p(saved_config, hp_base + HP_CONFIGURE);
233 udelay(5);
234
235 if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
236 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
237
238 if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
239 return;
240 }
241
242 static void
243 hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
244 {
245 int nic_base = dev->base_addr;
246 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
247
248 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
249 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
250 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
251 outb_p(0, nic_base + EN0_RCNTHI);
252 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
253 outb_p(ring_page, nic_base + EN0_RSARHI);
254 outb_p(E8390_RREAD+E8390_START, nic_base);
255
256 if (ei_status.word16)
257 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
258 else
259 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
260
261 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
262 }
263
264 /* Block input and output, similar to the Crynwr packet driver. If you are
265 porting to a new ethercard look at the packet driver source for hints.
266 The HP LAN doesn't use shared memory -- we put the packet
267 out through the "remote DMA" dataport. */
268
269 static void
270 hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
271 {
272 int nic_base = dev->base_addr;
273 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
274 int xfer_count = count;
275 char *buf = skb->data;
276
277 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
278 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
279 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
280 outb_p(count >> 8, nic_base + EN0_RCNTHI);
281 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
282 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
283 outb_p(E8390_RREAD+E8390_START, nic_base);
284 if (ei_status.word16) {
285 insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
286 if (count & 0x01)
287 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
288 } else {
289 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
290 }
291 /* This is for the ALPHA version only, remove for later releases. */
292 if (ei_debug > 0) { /* DMA termination address check... */
293 int high = inb_p(nic_base + EN0_RSARHI);
294 int low = inb_p(nic_base + EN0_RSARLO);
295 int addr = (high << 8) + low;
296 /* Check only the lower 8 bits so we can ignore ring wrap. */
297 if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
298 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
299 dev->name, ring_offset + xfer_count, addr);
300 }
301 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
302 }
303
304 static void
305 hp_block_output(struct net_device *dev, int count,
306 const unsigned char *buf, int start_page)
307 {
308 int nic_base = dev->base_addr;
309 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
310
311 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
312 /* Round the count up for word writes. Do we need to do this?
313 What effect will an odd byte count have on the 8390?
314 I should check someday. */
315 if (ei_status.word16 && (count & 0x01))
316 count++;
317 /* We should already be in page 0, but to be safe... */
318 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
319
320 #ifdef NE8390_RW_BUGFIX
321 /* Handle the read-before-write bug the same way as the
322 Crynwr packet driver -- the NatSemi method doesn't work. */
323 outb_p(0x42, nic_base + EN0_RCNTLO);
324 outb_p(0, nic_base + EN0_RCNTHI);
325 outb_p(0xff, nic_base + EN0_RSARLO);
326 outb_p(0x00, nic_base + EN0_RSARHI);
327 #define NE_CMD 0x00
328 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
329 /* Make certain that the dummy read has occurred. */
330 inb_p(0x61);
331 inb_p(0x61);
332 #endif
333
334 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
335 outb_p(count >> 8, nic_base + EN0_RCNTHI);
336 outb_p(0x00, nic_base + EN0_RSARLO);
337 outb_p(start_page, nic_base + EN0_RSARHI);
338
339 outb_p(E8390_RWRITE+E8390_START, nic_base);
340 if (ei_status.word16) {
341 /* Use the 'rep' sequence for 16 bit boards. */
342 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
343 } else {
344 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
345 }
346
347 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
348
349 /* This is for the ALPHA version only, remove for later releases. */
350 if (ei_debug > 0) { /* DMA termination address check... */
351 int high = inb_p(nic_base + EN0_RSARHI);
352 int low = inb_p(nic_base + EN0_RSARLO);
353 int addr = (high << 8) + low;
354 if ((start_page << 8) + count != addr)
355 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
356 dev->name, (start_page << 8) + count, addr);
357 }
358 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
359 return;
360 }
361
362 /* This function resets the ethercard if something screws up. */
363 static void
364 hp_init_card(struct net_device *dev)
365 {
366 int irq = dev->irq;
367 NS8390_init(dev, 0);
368 outb_p(irqmap[irq&0x0f] | HP_RUN,
369 dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
370 return;
371 }
372
373 #ifdef MODULE
374 #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
375 static struct net_device dev_hp[MAX_HP_CARDS];
376 static int io[MAX_HP_CARDS];
377 static int irq[MAX_HP_CARDS];
378
379 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
380 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
381 MODULE_PARM_DESC(io, "I/O base address(es)");
382 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
383 MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
384 MODULE_LICENSE("GPL");
385
386 /* This is set up so that only a single autoprobe takes place per call.
387 ISA device autoprobes on a running machine are not recommended. */
388 int
389 init_module(void)
390 {
391 int this_dev, found = 0;
392
393 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
394 struct net_device *dev = &dev_hp[this_dev];
395 dev->irq = irq[this_dev];
396 dev->base_addr = io[this_dev];
397 dev->init = hp_probe;
398 if (io[this_dev] == 0) {
399 if (this_dev != 0) break; /* only autoprobe 1st one */
400 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
401 }
402 if (register_netdev(dev) != 0) {
403 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
404 if (found != 0) { /* Got at least one. */
405 return 0;
406 }
407 return -ENXIO;
408 }
409 found++;
410 }
411 return 0;
412 }
413
414 void
415 cleanup_module(void)
416 {
417 int this_dev;
418
419 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
420 struct net_device *dev = &dev_hp[this_dev];
421 if (dev->priv != NULL) {
422 int ioaddr = dev->base_addr - NIC_OFFSET;
423 void *priv = dev->priv;
424 free_irq(dev->irq, dev);
425 release_region(ioaddr, HP_IO_EXTENT);
426 unregister_netdev(dev);
427 kfree(priv);
428 }
429 }
430 }
431 #endif /* MODULE */
432
433 \f
434 /*
435 * Local variables:
436 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
437 * version-control: t
438 * kept-new-versions: 5
439 * tab-width: 4
440 * c-indent-level: 4
441 * End:
442 */
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