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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
22static 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/interrupt.h>
34#include <linux/delay.h>
35
36#include <asm/system.h>
37#include <asm/io.h>
38
39#include "8390.h"
40
41#define DRV_NAME "hp"
42
43/* A zero-terminated list of I/O addresses to be probed. */
44static unsigned int hppclan_portlist[] __initdata =
45{ 0x300, 0x320, 0x340, 0x280, 0x2C0, 0x200, 0x240, 0};
46
47#define HP_IO_EXTENT 32
48
49#define HP_DATAPORT 0x0c /* "Remote DMA" data port. */
50#define HP_ID 0x07
51#define HP_CONFIGURE 0x08 /* Configuration register. */
52#define HP_RUN 0x01 /* 1 == Run, 0 == reset. */
53#define HP_IRQ 0x0E /* Mask for software-configured IRQ line. */
54#define HP_DATAON 0x10 /* Turn on dataport */
55#define NIC_OFFSET 0x10 /* Offset the 8390 registers. */
56
57#define HP_START_PG 0x00 /* First page of TX buffer */
58#define HP_8BSTOP_PG 0x80 /* Last page +1 of RX ring */
59#define HP_16BSTOP_PG 0xFF /* Same, for 16 bit cards. */
60
61static int hp_probe1(struct net_device *dev, int ioaddr);
62
63static void hp_reset_8390(struct net_device *dev);
64static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
65 int ring_page);
66static void hp_block_input(struct net_device *dev, int count,
67 struct sk_buff *skb , int ring_offset);
68static void hp_block_output(struct net_device *dev, int count,
69 const unsigned char *buf, int start_page);
70
71static 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 */
75static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
76
77
78/* Probe for an HP LAN adaptor.
79 Also initialize the card and fill in STATION_ADDR with the station
80 address. */
81
82static int __init do_hp_probe(struct net_device *dev)
83{
84 int i;
85 int base_addr = dev->base_addr;
86 int irq = dev->irq;
87
88 if (base_addr > 0x1ff) /* Check a single specified location. */
89 return hp_probe1(dev, base_addr);
90 else if (base_addr != 0) /* Don't probe at all. */
91 return -ENXIO;
92
93 for (i = 0; hppclan_portlist[i]; i++) {
94 if (hp_probe1(dev, hppclan_portlist[i]) == 0)
95 return 0;
96 dev->irq = irq;
97 }
98
99 return -ENODEV;
100}
101
102#ifndef MODULE
103struct net_device * __init hp_probe(int unit)
104{
105 struct net_device *dev = alloc_eip_netdev();
106 int err;
107
108 if (!dev)
109 return ERR_PTR(-ENOMEM);
110
111 sprintf(dev->name, "eth%d", unit);
112 netdev_boot_setup_check(dev);
113
114 err = do_hp_probe(dev);
115 if (err)
116 goto out;
117 return dev;
118out:
119 free_netdev(dev);
120 return ERR_PTR(err);
121}
122#endif
123
124static int __init hp_probe1(struct net_device *dev, int ioaddr)
125{
126 int i, retval, board_id, wordmode;
127 const char *name;
128 static unsigned version_printed;
129
130 if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME))
131 return -EBUSY;
132
133 /* Check for the HP physical address, 08 00 09 xx xx xx. */
134 /* This really isn't good enough: we may pick up HP LANCE boards
135 also! Avoid the lance 0x5757 signature. */
136 if (inb(ioaddr) != 0x08
137 || inb(ioaddr+1) != 0x00
138 || inb(ioaddr+2) != 0x09
139 || inb(ioaddr+14) == 0x57) {
140 retval = -ENODEV;
141 goto out;
142 }
143
144 /* Set up the parameters based on the board ID.
145 If you have additional mappings, please mail them to me -djb. */
146 if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
147 name = "HP27247";
148 wordmode = 1;
149 } else {
150 name = "HP27250";
151 wordmode = 0;
152 }
153
154 if (ei_debug && version_printed++ == 0)
155 printk(version);
156
157 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
158
159 for(i = 0; i < ETHER_ADDR_LEN; i++)
160 dev->dev_addr[i] = inb(ioaddr + i);
161
162 printk(" %pM", dev->dev_addr);
163
164 /* Snarf the interrupt now. Someday this could be moved to open(). */
165 if (dev->irq < 2) {
166 static const int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
167 static const int irq_8list[] = { 7, 5, 3, 4, 9, 0};
168 const int *irqp = wordmode ? irq_16list : irq_8list;
169 do {
170 int irq = *irqp;
171 if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
172 unsigned long cookie = probe_irq_on();
173 /* Twinkle the interrupt, and check if it's seen. */
174 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
175 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
176 if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
177 && request_irq (irq, eip_interrupt, 0, DRV_NAME, dev) == 0) {
178 printk(" selecting IRQ %d.\n", irq);
179 dev->irq = *irqp;
180 break;
181 }
182 }
183 } while (*++irqp);
184 if (*irqp == 0) {
185 printk(" no free IRQ lines.\n");
186 retval = -EBUSY;
187 goto out;
188 }
189 } else {
190 if (dev->irq == 2)
191 dev->irq = 9;
192 if ((retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev))) {
193 printk (" unable to get IRQ %d.\n", dev->irq);
194 goto out;
195 }
196 }
197
198 /* Set the base address to point to the NIC, not the "real" base! */
199 dev->base_addr = ioaddr + NIC_OFFSET;
200 dev->netdev_ops = &eip_netdev_ops;
201
202 ei_status.name = name;
203 ei_status.word16 = wordmode;
204 ei_status.tx_start_page = HP_START_PG;
205 ei_status.rx_start_page = HP_START_PG + TX_PAGES;
206 ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
207
208 ei_status.reset_8390 = hp_reset_8390;
209 ei_status.get_8390_hdr = hp_get_8390_hdr;
210 ei_status.block_input = hp_block_input;
211 ei_status.block_output = hp_block_output;
212 hp_init_card(dev);
213
214 retval = register_netdev(dev);
215 if (retval)
216 goto out1;
217 return 0;
218out1:
219 free_irq(dev->irq, dev);
220out:
221 release_region(ioaddr, HP_IO_EXTENT);
222 return retval;
223}
224
225static void
226hp_reset_8390(struct net_device *dev)
227{
228 int hp_base = dev->base_addr - NIC_OFFSET;
229 int saved_config = inb_p(hp_base + HP_CONFIGURE);
230
231 if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
232 outb_p(0x00, hp_base + HP_CONFIGURE);
233 ei_status.txing = 0;
234 /* Pause just a few cycles for the hardware reset to take place. */
235 udelay(5);
236
237 outb_p(saved_config, hp_base + HP_CONFIGURE);
238 udelay(5);
239
240 if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
241 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
242
243 if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
244}
245
246static void
247hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
248{
249 int nic_base = dev->base_addr;
250 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
251
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);
259
260 if (ei_status.word16)
261 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
262 else
263 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
264
265 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
266}
267
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. */
272
273static void
274hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
275{
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;
280
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);
290 if (count & 0x01)
291 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
292 } else {
293 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
294 }
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);
304 }
305 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
306}
307
308static void
309hp_block_output(struct net_device *dev, int count,
310 const unsigned char *buf, int start_page)
311{
312 int nic_base = dev->base_addr;
313 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
314
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))
320 count++;
321 /* We should already be in page 0, but to be safe... */
322 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
323
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);
331#define NE_CMD 0x00
332 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
333 /* Make certain that the dummy read has occurred. */
334 inb_p(0x61);
335 inb_p(0x61);
336#endif
337
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);
342
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);
347 } else {
348 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
349 }
350
351 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
352
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);
361 }
362 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
363}
364
365/* This function resets the ethercard if something screws up. */
366static void __init
367hp_init_card(struct net_device *dev)
368{
369 int irq = dev->irq;
370 NS8390p_init(dev, 0);
371 outb_p(irqmap[irq&0x0f] | HP_RUN,
372 dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
373}
374
375#ifdef MODULE
376#define MAX_HP_CARDS 4 /* Max number of HP cards per module */
377static struct net_device *dev_hp[MAX_HP_CARDS];
378static int io[MAX_HP_CARDS];
379static int irq[MAX_HP_CARDS];
380
381module_param_array(io, int, NULL, 0);
382module_param_array(irq, int, NULL, 0);
383MODULE_PARM_DESC(io, "I/O base address(es)");
384MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
385MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
386MODULE_LICENSE("GPL");
387
388/* This is set up so that only a single autoprobe takes place per call.
389ISA device autoprobes on a running machine are not recommended. */
390int __init
391init_module(void)
392{
393 struct net_device *dev;
394 int this_dev, found = 0;
395
396 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
397 if (io[this_dev] == 0) {
398 if (this_dev != 0) break; /* only autoprobe 1st one */
399 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
400 }
401 dev = alloc_eip_netdev();
402 if (!dev)
403 break;
404 dev->irq = irq[this_dev];
405 dev->base_addr = io[this_dev];
406 if (do_hp_probe(dev) == 0) {
407 dev_hp[found++] = dev;
408 continue;
409 }
410 free_netdev(dev);
411 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
412 break;
413 }
414 if (found)
415 return 0;
416 return -ENXIO;
417}
418
419static void cleanup_card(struct net_device *dev)
420{
421 free_irq(dev->irq, dev);
422 release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
423}
424
425void __exit
426cleanup_module(void)
427{
428 int this_dev;
429
430 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
431 struct net_device *dev = dev_hp[this_dev];
432 if (dev) {
433 unregister_netdev(dev);
434 cleanup_card(dev);
435 free_netdev(dev);
436 }
437 }
438}
439#endif /* MODULE */