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
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/errno.h>
31 #include <linux/ioport.h>
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
36
37 #include <asm/system.h>
38 #include <asm/io.h>
39
40 #include "8390.h"
41
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};
45
46 #define HP_IO_EXTENT 32
47
48 #define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
49 #define HP_ID 0x07
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. */
55
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. */
59
60 int hp_probe(struct net_device *dev);
61 static int hp_probe1(struct net_device *dev, int ioaddr);
62
63 static int hp_open(struct net_device *dev);
64 static int hp_close(struct net_device *dev);
65 static void hp_reset_8390(struct net_device *dev);
66 static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
67 int ring_page);
68 static void hp_block_input(struct net_device *dev, int count,
69 struct sk_buff *skb , int ring_offset);
70 static void hp_block_output(struct net_device *dev, int count,
71 const unsigned char *buf, int start_page);
72
73 static void hp_init_card(struct net_device *dev);
74
75 /* The map from IRQ number to HP_CONFIGURE register setting. */
76 /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
77 static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
78
79
80 /* Probe for an HP LAN adaptor.
81 Also initialize the card and fill in STATION_ADDR with the station
82 address. */
83
hp_probe(struct net_device * dev)84 int __init hp_probe(struct net_device *dev)
85 {
86 int i;
87 int base_addr = dev->base_addr;
88
89 SET_MODULE_OWNER(dev);
90
91 if (base_addr > 0x1ff) /* Check a single specified location. */
92 return hp_probe1(dev, base_addr);
93 else if (base_addr != 0) /* Don't probe at all. */
94 return -ENXIO;
95
96 for (i = 0; hppclan_portlist[i]; i++)
97 if (hp_probe1(dev, hppclan_portlist[i]) == 0)
98 return 0;
99
100 return -ENODEV;
101 }
102
hp_probe1(struct net_device * dev,int ioaddr)103 static int __init hp_probe1(struct net_device *dev, int ioaddr)
104 {
105 int i, retval, board_id, wordmode;
106 const char *name;
107 static unsigned version_printed;
108
109 if (!request_region(ioaddr, HP_IO_EXTENT, dev->name))
110 return -EBUSY;
111
112 /* Check for the HP physical address, 08 00 09 xx xx xx. */
113 /* This really isn't good enough: we may pick up HP LANCE boards
114 also! Avoid the lance 0x5757 signature. */
115 if (inb(ioaddr) != 0x08
116 || inb(ioaddr+1) != 0x00
117 || inb(ioaddr+2) != 0x09
118 || inb(ioaddr+14) == 0x57) {
119 retval = -ENODEV;
120 goto out;
121 }
122
123 /* Set up the parameters based on the board ID.
124 If you have additional mappings, please mail them to me -djb. */
125 if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
126 name = "HP27247";
127 wordmode = 1;
128 } else {
129 name = "HP27250";
130 wordmode = 0;
131 }
132
133 if (ei_debug && version_printed++ == 0)
134 printk(version);
135
136 /* Allocate dev->priv and fill in 8390 specific dev fields. */
137 if (ethdev_init(dev)) {
138 printk (" unable to get memory for dev->priv.\n");
139 retval = -ENOMEM;
140 goto out;
141 }
142
143 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
144
145 for(i = 0; i < ETHER_ADDR_LEN; i++)
146 printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
147
148 /* Snarf the interrupt now. Someday this could be moved to open(). */
149 if (dev->irq < 2) {
150 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
151 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
152 int *irqp = wordmode ? irq_16list : irq_8list;
153 do {
154 int irq = *irqp;
155 if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
156 unsigned long cookie = probe_irq_on();
157 /* Twinkle the interrupt, and check if it's seen. */
158 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
159 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
160 if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
161 && request_irq (irq, ei_interrupt, 0, dev->name, dev) == 0) {
162 printk(" selecting IRQ %d.\n", irq);
163 dev->irq = *irqp;
164 break;
165 }
166 }
167 } while (*++irqp);
168 if (*irqp == 0) {
169 printk(" no free IRQ lines.\n");
170 retval = -EBUSY;
171 goto out1;
172 }
173 } else {
174 if (dev->irq == 2)
175 dev->irq = 9;
176 if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))) {
177 printk (" unable to get IRQ %d.\n", dev->irq);
178 goto out1;
179 }
180 }
181
182 /* Set the base address to point to the NIC, not the "real" base! */
183 dev->base_addr = ioaddr + NIC_OFFSET;
184 dev->open = &hp_open;
185 dev->stop = &hp_close;
186
187 ei_status.name = name;
188 ei_status.word16 = wordmode;
189 ei_status.tx_start_page = HP_START_PG;
190 ei_status.rx_start_page = HP_START_PG + TX_PAGES;
191 ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
192
193 ei_status.reset_8390 = &hp_reset_8390;
194 ei_status.get_8390_hdr = &hp_get_8390_hdr;
195 ei_status.block_input = &hp_block_input;
196 ei_status.block_output = &hp_block_output;
197 hp_init_card(dev);
198
199 return 0;
200 out1:
201 kfree(dev->priv);
202 dev->priv = NULL;
203 out:
204 release_region(ioaddr, HP_IO_EXTENT);
205 return retval;
206 }
207
208 static int
hp_open(struct net_device * dev)209 hp_open(struct net_device *dev)
210 {
211 ei_open(dev);
212 return 0;
213 }
214
215 static int
hp_close(struct net_device * dev)216 hp_close(struct net_device *dev)
217 {
218 ei_close(dev);
219 return 0;
220 }
221
222 static void
hp_reset_8390(struct net_device * dev)223 hp_reset_8390(struct net_device *dev)
224 {
225 int hp_base = dev->base_addr - NIC_OFFSET;
226 int saved_config = inb_p(hp_base + HP_CONFIGURE);
227
228 if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
229 outb_p(0x00, hp_base + HP_CONFIGURE);
230 ei_status.txing = 0;
231 /* Pause just a few cycles for the hardware reset to take place. */
232 udelay(5);
233
234 outb_p(saved_config, hp_base + HP_CONFIGURE);
235 udelay(5);
236
237 if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
238 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
239
240 if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
241 return;
242 }
243
244 static void
hp_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)245 hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
246 {
247 int nic_base = dev->base_addr;
248 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
249
250 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
251 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
252 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
253 outb_p(0, nic_base + EN0_RCNTHI);
254 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
255 outb_p(ring_page, nic_base + EN0_RSARHI);
256 outb_p(E8390_RREAD+E8390_START, nic_base);
257
258 if (ei_status.word16)
259 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
260 else
261 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
262
263 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
264 }
265
266 /* Block input and output, similar to the Crynwr packet driver. If you are
267 porting to a new ethercard look at the packet driver source for hints.
268 The HP LAN doesn't use shared memory -- we put the packet
269 out through the "remote DMA" dataport. */
270
271 static void
hp_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)272 hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
273 {
274 int nic_base = dev->base_addr;
275 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
276 int xfer_count = count;
277 char *buf = skb->data;
278
279 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
280 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
281 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
282 outb_p(count >> 8, nic_base + EN0_RCNTHI);
283 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
284 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
285 outb_p(E8390_RREAD+E8390_START, nic_base);
286 if (ei_status.word16) {
287 insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
288 if (count & 0x01)
289 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
290 } else {
291 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
292 }
293 /* This is for the ALPHA version only, remove for later releases. */
294 if (ei_debug > 0) { /* DMA termination address check... */
295 int high = inb_p(nic_base + EN0_RSARHI);
296 int low = inb_p(nic_base + EN0_RSARLO);
297 int addr = (high << 8) + low;
298 /* Check only the lower 8 bits so we can ignore ring wrap. */
299 if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
300 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
301 dev->name, ring_offset + xfer_count, addr);
302 }
303 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
304 }
305
306 static void
hp_block_output(struct net_device * dev,int count,const unsigned char * buf,int start_page)307 hp_block_output(struct net_device *dev, int count,
308 const unsigned char *buf, int start_page)
309 {
310 int nic_base = dev->base_addr;
311 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
312
313 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
314 /* Round the count up for word writes. Do we need to do this?
315 What effect will an odd byte count have on the 8390?
316 I should check someday. */
317 if (ei_status.word16 && (count & 0x01))
318 count++;
319 /* We should already be in page 0, but to be safe... */
320 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
321
322 #ifdef NE8390_RW_BUGFIX
323 /* Handle the read-before-write bug the same way as the
324 Crynwr packet driver -- the NatSemi method doesn't work. */
325 outb_p(0x42, nic_base + EN0_RCNTLO);
326 outb_p(0, nic_base + EN0_RCNTHI);
327 outb_p(0xff, nic_base + EN0_RSARLO);
328 outb_p(0x00, nic_base + EN0_RSARHI);
329 #define NE_CMD 0x00
330 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
331 /* Make certain that the dummy read has occurred. */
332 inb_p(0x61);
333 inb_p(0x61);
334 #endif
335
336 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
337 outb_p(count >> 8, nic_base + EN0_RCNTHI);
338 outb_p(0x00, nic_base + EN0_RSARLO);
339 outb_p(start_page, nic_base + EN0_RSARHI);
340
341 outb_p(E8390_RWRITE+E8390_START, nic_base);
342 if (ei_status.word16) {
343 /* Use the 'rep' sequence for 16 bit boards. */
344 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
345 } else {
346 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
347 }
348
349 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
350
351 /* This is for the ALPHA version only, remove for later releases. */
352 if (ei_debug > 0) { /* DMA termination address check... */
353 int high = inb_p(nic_base + EN0_RSARHI);
354 int low = inb_p(nic_base + EN0_RSARLO);
355 int addr = (high << 8) + low;
356 if ((start_page << 8) + count != addr)
357 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
358 dev->name, (start_page << 8) + count, addr);
359 }
360 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
361 return;
362 }
363
364 /* This function resets the ethercard if something screws up. */
365 static void
hp_init_card(struct net_device * dev)366 hp_init_card(struct net_device *dev)
367 {
368 int irq = dev->irq;
369 NS8390_init(dev, 0);
370 outb_p(irqmap[irq&0x0f] | HP_RUN,
371 dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
372 return;
373 }
374
375 #ifdef MODULE
376 #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
377 static struct net_device dev_hp[MAX_HP_CARDS];
378 static int io[MAX_HP_CARDS];
379 static int irq[MAX_HP_CARDS];
380
381 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
382 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
383 MODULE_PARM_DESC(io, "I/O base address(es)");
384 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
385 MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
386 MODULE_LICENSE("GPL");
387
388 /* This is set up so that only a single autoprobe takes place per call.
389 ISA device autoprobes on a running machine are not recommended. */
390 int
init_module(void)391 init_module(void)
392 {
393 int this_dev, found = 0;
394
395 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
396 struct net_device *dev = &dev_hp[this_dev];
397 dev->irq = irq[this_dev];
398 dev->base_addr = io[this_dev];
399 dev->init = hp_probe;
400 if (io[this_dev] == 0) {
401 if (this_dev != 0) break; /* only autoprobe 1st one */
402 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
403 }
404 if (register_netdev(dev) != 0) {
405 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
406 if (found != 0) { /* Got at least one. */
407 return 0;
408 }
409 return -ENXIO;
410 }
411 found++;
412 }
413 return 0;
414 }
415
416 void
cleanup_module(void)417 cleanup_module(void)
418 {
419 int this_dev;
420
421 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
422 struct net_device *dev = &dev_hp[this_dev];
423 if (dev->priv != NULL) {
424 int ioaddr = dev->base_addr - NIC_OFFSET;
425 void *priv = dev->priv;
426 free_irq(dev->irq, dev);
427 release_region(ioaddr, HP_IO_EXTENT);
428 unregister_netdev(dev);
429 kfree(priv);
430 }
431 }
432 }
433 #endif /* MODULE */
434
435
436 /*
437 * Local variables:
438 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
439 * version-control: t
440 * kept-new-versions: 5
441 * tab-width: 4
442 * c-indent-level: 4
443 * End:
444 */
445