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Import 2.1.37pre7
[davej-history.git] / drivers / net / hp.c
blobd57763e46ef226d2059df3fefc74a4e0c0937c87
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 Public License, incorporated herein by reference.
10
11 The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
12 Center of Excellence in Space Data and Information Sciences
13 Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
14
15 This is a driver for the HP PC-LAN adaptors.
16
17 Sources:
18 The Crynwr packet driver.
19 */
20
21 static const char *version =
22 "hp.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
23
24
25 #include <linux/module.h>
26
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/errno.h>
30 #include <linux/ioport.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/init.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 device *dev);
59 int hp_probe1(struct device *dev, int ioaddr);
60
61 static int hp_open(struct device *dev);
62 static int hp_close(struct device *dev);
63 static void hp_reset_8390(struct device *dev);
64 static void hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
65 int ring_page);
66 static void hp_block_input(struct device *dev, int count,
67 struct sk_buff *skb , int ring_offset);
68 static void hp_block_output(struct device *dev, int count,
69 const unsigned char *buf, const start_page);
70
71 static void hp_init_card(struct 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 #ifdef HAVE_DEVLIST
82 struct netdev_entry netcard_drv =
83 {"hp", hp_probe1, HP_IO_EXTENT, hppclan_portlist};
84 #else
85
86 __initfunc(int hp_probe(struct device *dev))
87 {
88 int i;
89 int base_addr = dev ? dev->base_addr : 0;
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 int ioaddr = hppclan_portlist[i];
98 if (check_region(ioaddr, HP_IO_EXTENT))
99 continue;
100 if (hp_probe1(dev, ioaddr) == 0)
101 return 0;
102 }
103
104 return ENODEV;
105 }
106 #endif
107
108 __initfunc(int hp_probe1(struct device *dev, int ioaddr))
109 {
110 int i, board_id, wordmode;
111 const char *name;
112 static unsigned version_printed = 0;
113
114 /* Check for the HP physical address, 08 00 09 xx xx xx. */
115 /* This really isn't good enough: we may pick up HP LANCE boards
116 also! Avoid the lance 0x5757 signature. */
117 if (inb(ioaddr) != 0x08
118 || inb(ioaddr+1) != 0x00
119 || inb(ioaddr+2) != 0x09
120 || inb(ioaddr+14) == 0x57)
121 return ENODEV;
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 /* We should have a "dev" from Space.c or the static module table. */
134 if (dev == NULL) {
135 printk("hp.c: Passed a NULL device.\n");
136 dev = init_etherdev(0, 0);
137 }
138
139 if (ei_debug && version_printed++ == 0)
140 printk(version);
141
142 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
143
144 for(i = 0; i < ETHER_ADDR_LEN; i++)
145 printk(" %2.2x", dev->dev_addr[i] = inb(ioaddr + i));
146
147 /* Snarf the interrupt now. Someday this could be moved to open(). */
148 if (dev->irq < 2) {
149 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
150 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
151 int *irqp = wordmode ? irq_16list : irq_8list;
152 do {
153 int irq = *irqp;
154 if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
155 autoirq_setup(0);
156 /* Twinkle the interrupt, and check if it's seen. */
157 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
158 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
159 if (irq == autoirq_report(0) /* It's a good IRQ line! */
160 && request_irq (irq, &ei_interrupt, 0, "hp", NULL) == 0) {
161 printk(" selecting IRQ %d.\n", irq);
162 dev->irq = *irqp;
163 break;
164 }
165 }
166 } while (*++irqp);
167 if (*irqp == 0) {
168 printk(" no free IRQ lines.\n");
169 return EBUSY;
170 }
171 } else {
172 if (dev->irq == 2)
173 dev->irq = 9;
174 if (request_irq(dev->irq, ei_interrupt, 0, "hp", NULL)) {
175 printk (" unable to get IRQ %d.\n", dev->irq);
176 return EBUSY;
177 }
178 }
179
180 /* Allocate dev->priv and fill in 8390 specific dev fields. */
181 if (ethdev_init(dev)) {
182 printk (" unable to get memory for dev->priv.\n");
183 free_irq(dev->irq, NULL);
184 return -ENOMEM;
185 }
186
187 /* Grab the region so we can find another board if something fails. */
188 request_region(ioaddr, HP_IO_EXTENT,"hp");
189
190 /* Set the base address to point to the NIC, not the "real" base! */
191 dev->base_addr = ioaddr + NIC_OFFSET;
192 dev->open = &hp_open;
193 dev->stop = &hp_close;
194
195 ei_status.name = name;
196 ei_status.word16 = wordmode;
197 ei_status.tx_start_page = HP_START_PG;
198 ei_status.rx_start_page = HP_START_PG + TX_PAGES;
199 ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
200
201 ei_status.reset_8390 = &hp_reset_8390;
202 ei_status.get_8390_hdr = &hp_get_8390_hdr;
203 ei_status.block_input = &hp_block_input;
204 ei_status.block_output = &hp_block_output;
205 hp_init_card(dev);
206
207 return 0;
208 }
209
210 static int
211 hp_open(struct device *dev)
212 {
213 ei_open(dev);
214 MOD_INC_USE_COUNT;
215 return 0;
216 }
217
218 static int
219 hp_close(struct device *dev)
220 {
221 ei_close(dev);
222 MOD_DEC_USE_COUNT;
223 return 0;
224 }
225
226 static void
227 hp_reset_8390(struct device *dev)
228 {
229 int hp_base = dev->base_addr - NIC_OFFSET;
230 int saved_config = inb_p(hp_base + HP_CONFIGURE);
231
232 if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
233 outb_p(0x00, hp_base + HP_CONFIGURE);
234 ei_status.txing = 0;
235 /* Pause just a few cycles for the hardware reset to take place. */
236 SLOW_DOWN_IO;
237 SLOW_DOWN_IO;
238
239 outb_p(saved_config, hp_base + HP_CONFIGURE);
240 SLOW_DOWN_IO; SLOW_DOWN_IO;
241
242 if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
243 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
244
245 if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
246 return;
247 }
248
249 static void
250 hp_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
251 {
252 int nic_base = dev->base_addr;
253 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
254
255 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
256 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
257 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
258 outb_p(0, nic_base + EN0_RCNTHI);
259 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
260 outb_p(ring_page, nic_base + EN0_RSARHI);
261 outb_p(E8390_RREAD+E8390_START, nic_base);
262
263 if (ei_status.word16)
264 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
265 else
266 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
267
268 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
269 }
270
271 /* Block input and output, similar to the Crynwr packet driver. If you are
272 porting to a new ethercard look at the packet driver source for hints.
273 The HP LAN doesn't use shared memory -- we put the packet
274 out through the "remote DMA" dataport. */
275
276 static void
277 hp_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
278 {
279 int nic_base = dev->base_addr;
280 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
281 int xfer_count = count;
282 char *buf = skb->data;
283
284 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
285 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
286 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
287 outb_p(count >> 8, nic_base + EN0_RCNTHI);
288 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
289 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
290 outb_p(E8390_RREAD+E8390_START, nic_base);
291 if (ei_status.word16) {
292 insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
293 if (count & 0x01)
294 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
295 } else {
296 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
297 }
298 /* This is for the ALPHA version only, remove for later releases. */
299 if (ei_debug > 0) { /* DMA termination address check... */
300 int high = inb_p(nic_base + EN0_RSARHI);
301 int low = inb_p(nic_base + EN0_RSARLO);
302 int addr = (high << 8) + low;
303 /* Check only the lower 8 bits so we can ignore ring wrap. */
304 if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
305 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
306 dev->name, ring_offset + xfer_count, addr);
307 }
308 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
309 }
310
311 static void
312 hp_block_output(struct device *dev, int count,
313 const unsigned char *buf, const start_page)
314 {
315 int nic_base = dev->base_addr;
316 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
317
318 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
319 /* Round the count up for word writes. Do we need to do this?
320 What effect will an odd byte count have on the 8390?
321 I should check someday. */
322 if (ei_status.word16 && (count & 0x01))
323 count++;
324 /* We should already be in page 0, but to be safe... */
325 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
326
327 #ifdef NE8390_RW_BUGFIX
328 /* Handle the read-before-write bug the same way as the
329 Crynwr packet driver -- the NatSemi method doesn't work. */
330 outb_p(0x42, nic_base + EN0_RCNTLO);
331 outb_p(0, nic_base + EN0_RCNTHI);
332 outb_p(0xff, nic_base + EN0_RSARLO);
333 outb_p(0x00, nic_base + EN0_RSARHI);
334 #define NE_CMD 0x00
335 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
336 /* Make certain that the dummy read has occurred. */
337 inb_p(0x61);
338 inb_p(0x61);
339 #endif
340
341 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
342 outb_p(count >> 8, nic_base + EN0_RCNTHI);
343 outb_p(0x00, nic_base + EN0_RSARLO);
344 outb_p(start_page, nic_base + EN0_RSARHI);
345
346 outb_p(E8390_RWRITE+E8390_START, nic_base);
347 if (ei_status.word16) {
348 /* Use the 'rep' sequence for 16 bit boards. */
349 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
350 } else {
351 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
352 }
353
354 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
355
356 /* This is for the ALPHA version only, remove for later releases. */
357 if (ei_debug > 0) { /* DMA termination address check... */
358 int high = inb_p(nic_base + EN0_RSARHI);
359 int low = inb_p(nic_base + EN0_RSARLO);
360 int addr = (high << 8) + low;
361 if ((start_page << 8) + count != addr)
362 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
363 dev->name, (start_page << 8) + count, addr);
364 }
365 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
366 return;
367 }
368
369 /* This function resets the ethercard if something screws up. */
370 static void
371 hp_init_card(struct device *dev)
372 {
373 int irq = dev->irq;
374 NS8390_init(dev, 0);
375 outb_p(irqmap[irq&0x0f] | HP_RUN,
376 dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
377 return;
378 }
379
380 #ifdef MODULE
381 #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
382 #define NAMELEN 8 /* # of chars for storing dev->name */
383 static char namelist[NAMELEN * MAX_HP_CARDS] = { 0, };
384 static struct device dev_hp[MAX_HP_CARDS] = {
385 {
386 NULL, /* assign a chunk of namelist[] below */
387 0, 0, 0, 0,
388 0, 0,
389 0, 0, 0, NULL, NULL
390 },
391 };
392
393 static int io[MAX_HP_CARDS] = { 0, };
394 static int irq[MAX_HP_CARDS] = { 0, };
395
396 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
397 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_HP_CARDS) "i");
398
399 /* This is set up so that only a single autoprobe takes place per call.
400 ISA device autoprobes on a running machine are not recommended. */
401 int
402 init_module(void)
403 {
404 int this_dev, found = 0;
405
406 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
407 struct device *dev = &dev_hp[this_dev];
408 dev->name = namelist+(NAMELEN*this_dev);
409 dev->irq = irq[this_dev];
410 dev->base_addr = io[this_dev];
411 dev->init = hp_probe;
412 if (io[this_dev] == 0) {
413 if (this_dev != 0) break; /* only autoprobe 1st one */
414 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
415 }
416 if (register_netdev(dev) != 0) {
417 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
418 if (found != 0) return 0; /* Got at least one. */
419 return -ENXIO;
420 }
421 found++;
422 }
423
424 return 0;
425 }
426
427 void
428 cleanup_module(void)
429 {
430 int this_dev;
431
432 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
433 struct device *dev = &dev_hp[this_dev];
434 if (dev->priv != NULL) {
435 int ioaddr = dev->base_addr - NIC_OFFSET;
436 kfree(dev->priv);
437 dev->priv = NULL;
438 free_irq(dev->irq, NULL);
439 irq2dev_map[dev->irq] = NULL;
440 release_region(ioaddr, HP_IO_EXTENT);
441 unregister_netdev(dev);
442 }
443 }
444 }
445 #endif /* MODULE */
446 \f
447 /*
448 * Local variables:
449 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c hp.c"
450 * version-control: t
451 * kept-new-versions: 5
452 * tab-width: 4
453 * c-indent-level: 4
454 * End:
455 */
Copy of Dave Jones history.git as used by http://archive.org/details/git-history-of-linux