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sched: make early bootup sched_clock() use safer
[wrt350n-kernel.git] / drivers / net / hp.c
blobc649a8019bebc0ec2b49373710c072b926e9a38a
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 #define DRV_NAME "hp"
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 static int hp_probe1(struct net_device *dev, int ioaddr);
61
62 static int hp_open(struct net_device *dev);
63 static int hp_close(struct net_device *dev);
64 static void hp_reset_8390(struct net_device *dev);
65 static void hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
66 int ring_page);
67 static void hp_block_input(struct net_device *dev, int count,
68 struct sk_buff *skb , int ring_offset);
69 static void hp_block_output(struct net_device *dev, int count,
70 const unsigned char *buf, int start_page);
71
72 static void hp_init_card(struct net_device *dev);
73
74 /* The map from IRQ number to HP_CONFIGURE register setting. */
75 /* My default is IRQ5 0 1 2 3 4 5 6 7 8 9 10 11 */
76 static char irqmap[16] __initdata= { 0, 0, 4, 6, 8,10, 0,14, 0, 4, 2,12,0,0,0,0};
77
78
79 /* Probe for an HP LAN adaptor.
80 Also initialize the card and fill in STATION_ADDR with the station
81 address. */
82
83 static int __init do_hp_probe(struct net_device *dev)
84 {
85 int i;
86 int base_addr = dev->base_addr;
87 int irq = dev->irq;
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 dev->irq = irq;
98 }
99
100 return -ENODEV;
101 }
102
103 #ifndef MODULE
104 struct net_device * __init hp_probe(int unit)
105 {
106 struct net_device *dev = alloc_ei_netdev();
107 int err;
108
109 if (!dev)
110 return ERR_PTR(-ENOMEM);
111
112 sprintf(dev->name, "eth%d", unit);
113 netdev_boot_setup_check(dev);
114
115 err = do_hp_probe(dev);
116 if (err)
117 goto out;
118 return dev;
119 out:
120 free_netdev(dev);
121 return ERR_PTR(err);
122 }
123 #endif
124
125 static int __init hp_probe1(struct net_device *dev, int ioaddr)
126 {
127 int i, retval, board_id, wordmode;
128 const char *name;
129 static unsigned version_printed;
130 DECLARE_MAC_BUF(mac);
131
132 if (!request_region(ioaddr, HP_IO_EXTENT, DRV_NAME))
133 return -EBUSY;
134
135 /* Check for the HP physical address, 08 00 09 xx xx xx. */
136 /* This really isn't good enough: we may pick up HP LANCE boards
137 also! Avoid the lance 0x5757 signature. */
138 if (inb(ioaddr) != 0x08
139 || inb(ioaddr+1) != 0x00
140 || inb(ioaddr+2) != 0x09
141 || inb(ioaddr+14) == 0x57) {
142 retval = -ENODEV;
143 goto out;
144 }
145
146 /* Set up the parameters based on the board ID.
147 If you have additional mappings, please mail them to me -djb. */
148 if ((board_id = inb(ioaddr + HP_ID)) & 0x80) {
149 name = "HP27247";
150 wordmode = 1;
151 } else {
152 name = "HP27250";
153 wordmode = 0;
154 }
155
156 if (ei_debug && version_printed++ == 0)
157 printk(version);
158
159 printk("%s: %s (ID %02x) at %#3x,", dev->name, name, board_id, ioaddr);
160
161 for(i = 0; i < ETHER_ADDR_LEN; i++)
162 dev->dev_addr[i] = inb(ioaddr + i);
163
164 printk(" %s", print_mac(mac, dev->dev_addr));
165
166 /* Snarf the interrupt now. Someday this could be moved to open(). */
167 if (dev->irq < 2) {
168 int irq_16list[] = { 11, 10, 5, 3, 4, 7, 9, 0};
169 int irq_8list[] = { 7, 5, 3, 4, 9, 0};
170 int *irqp = wordmode ? irq_16list : irq_8list;
171 do {
172 int irq = *irqp;
173 if (request_irq (irq, NULL, 0, "bogus", NULL) != -EBUSY) {
174 unsigned long cookie = probe_irq_on();
175 /* Twinkle the interrupt, and check if it's seen. */
176 outb_p(irqmap[irq] | HP_RUN, ioaddr + HP_CONFIGURE);
177 outb_p( 0x00 | HP_RUN, ioaddr + HP_CONFIGURE);
178 if (irq == probe_irq_off(cookie) /* It's a good IRQ line! */
179 && request_irq (irq, ei_interrupt, 0, DRV_NAME, dev) == 0) {
180 printk(" selecting IRQ %d.\n", irq);
181 dev->irq = *irqp;
182 break;
183 }
184 }
185 } while (*++irqp);
186 if (*irqp == 0) {
187 printk(" no free IRQ lines.\n");
188 retval = -EBUSY;
189 goto out;
190 }
191 } else {
192 if (dev->irq == 2)
193 dev->irq = 9;
194 if ((retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev))) {
195 printk (" unable to get IRQ %d.\n", dev->irq);
196 goto out;
197 }
198 }
199
200 /* Set the base address to point to the NIC, not the "real" base! */
201 dev->base_addr = ioaddr + NIC_OFFSET;
202 dev->open = &hp_open;
203 dev->stop = &hp_close;
204 #ifdef CONFIG_NET_POLL_CONTROLLER
205 dev->poll_controller = ei_poll;
206 #endif
207
208 ei_status.name = name;
209 ei_status.word16 = wordmode;
210 ei_status.tx_start_page = HP_START_PG;
211 ei_status.rx_start_page = HP_START_PG + TX_PAGES;
212 ei_status.stop_page = wordmode ? HP_16BSTOP_PG : HP_8BSTOP_PG;
213
214 ei_status.reset_8390 = &hp_reset_8390;
215 ei_status.get_8390_hdr = &hp_get_8390_hdr;
216 ei_status.block_input = &hp_block_input;
217 ei_status.block_output = &hp_block_output;
218 hp_init_card(dev);
219
220 retval = register_netdev(dev);
221 if (retval)
222 goto out1;
223 return 0;
224 out1:
225 free_irq(dev->irq, dev);
226 out:
227 release_region(ioaddr, HP_IO_EXTENT);
228 return retval;
229 }
230
231 static int
232 hp_open(struct net_device *dev)
233 {
234 ei_open(dev);
235 return 0;
236 }
237
238 static int
239 hp_close(struct net_device *dev)
240 {
241 ei_close(dev);
242 return 0;
243 }
244
245 static void
246 hp_reset_8390(struct net_device *dev)
247 {
248 int hp_base = dev->base_addr - NIC_OFFSET;
249 int saved_config = inb_p(hp_base + HP_CONFIGURE);
250
251 if (ei_debug > 1) printk("resetting the 8390 time=%ld...", jiffies);
252 outb_p(0x00, hp_base + HP_CONFIGURE);
253 ei_status.txing = 0;
254 /* Pause just a few cycles for the hardware reset to take place. */
255 udelay(5);
256
257 outb_p(saved_config, hp_base + HP_CONFIGURE);
258 udelay(5);
259
260 if ((inb_p(hp_base+NIC_OFFSET+EN0_ISR) & ENISR_RESET) == 0)
261 printk("%s: hp_reset_8390() did not complete.\n", dev->name);
262
263 if (ei_debug > 1) printk("8390 reset done (%ld).", jiffies);
264 return;
265 }
266
267 static void
268 hp_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
269 {
270 int nic_base = dev->base_addr;
271 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
272
273 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
274 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
275 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
276 outb_p(0, nic_base + EN0_RCNTHI);
277 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
278 outb_p(ring_page, nic_base + EN0_RSARHI);
279 outb_p(E8390_RREAD+E8390_START, nic_base);
280
281 if (ei_status.word16)
282 insw(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
283 else
284 insb(nic_base - NIC_OFFSET + HP_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
285
286 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
287 }
288
289 /* Block input and output, similar to the Crynwr packet driver. If you are
290 porting to a new ethercard look at the packet driver source for hints.
291 The HP LAN doesn't use shared memory -- we put the packet
292 out through the "remote DMA" dataport. */
293
294 static void
295 hp_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
296 {
297 int nic_base = dev->base_addr;
298 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
299 int xfer_count = count;
300 char *buf = skb->data;
301
302 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
303 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base);
304 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
305 outb_p(count >> 8, nic_base + EN0_RCNTHI);
306 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
307 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
308 outb_p(E8390_RREAD+E8390_START, nic_base);
309 if (ei_status.word16) {
310 insw(nic_base - NIC_OFFSET + HP_DATAPORT,buf,count>>1);
311 if (count & 0x01)
312 buf[count-1] = inb(nic_base - NIC_OFFSET + HP_DATAPORT), xfer_count++;
313 } else {
314 insb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
315 }
316 /* This is for the ALPHA version only, remove for later releases. */
317 if (ei_debug > 0) { /* DMA termination address check... */
318 int high = inb_p(nic_base + EN0_RSARHI);
319 int low = inb_p(nic_base + EN0_RSARLO);
320 int addr = (high << 8) + low;
321 /* Check only the lower 8 bits so we can ignore ring wrap. */
322 if (((ring_offset + xfer_count) & 0xff) != (addr & 0xff))
323 printk("%s: RX transfer address mismatch, %#4.4x vs. %#4.4x (actual).\n",
324 dev->name, ring_offset + xfer_count, addr);
325 }
326 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
327 }
328
329 static void
330 hp_block_output(struct net_device *dev, int count,
331 const unsigned char *buf, int start_page)
332 {
333 int nic_base = dev->base_addr;
334 int saved_config = inb_p(nic_base - NIC_OFFSET + HP_CONFIGURE);
335
336 outb_p(saved_config | HP_DATAON, nic_base - NIC_OFFSET + HP_CONFIGURE);
337 /* Round the count up for word writes. Do we need to do this?
338 What effect will an odd byte count have on the 8390?
339 I should check someday. */
340 if (ei_status.word16 && (count & 0x01))
341 count++;
342 /* We should already be in page 0, but to be safe... */
343 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base);
344
345 #ifdef NE8390_RW_BUGFIX
346 /* Handle the read-before-write bug the same way as the
347 Crynwr packet driver -- the NatSemi method doesn't work. */
348 outb_p(0x42, nic_base + EN0_RCNTLO);
349 outb_p(0, nic_base + EN0_RCNTHI);
350 outb_p(0xff, nic_base + EN0_RSARLO);
351 outb_p(0x00, nic_base + EN0_RSARHI);
352 #define NE_CMD 0x00
353 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
354 /* Make certain that the dummy read has occurred. */
355 inb_p(0x61);
356 inb_p(0x61);
357 #endif
358
359 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
360 outb_p(count >> 8, nic_base + EN0_RCNTHI);
361 outb_p(0x00, nic_base + EN0_RSARLO);
362 outb_p(start_page, nic_base + EN0_RSARHI);
363
364 outb_p(E8390_RWRITE+E8390_START, nic_base);
365 if (ei_status.word16) {
366 /* Use the 'rep' sequence for 16 bit boards. */
367 outsw(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count>>1);
368 } else {
369 outsb(nic_base - NIC_OFFSET + HP_DATAPORT, buf, count);
370 }
371
372 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here -- it's broken! */
373
374 /* This is for the ALPHA version only, remove for later releases. */
375 if (ei_debug > 0) { /* DMA termination address check... */
376 int high = inb_p(nic_base + EN0_RSARHI);
377 int low = inb_p(nic_base + EN0_RSARLO);
378 int addr = (high << 8) + low;
379 if ((start_page << 8) + count != addr)
380 printk("%s: TX Transfer address mismatch, %#4.4x vs. %#4.4x.\n",
381 dev->name, (start_page << 8) + count, addr);
382 }
383 outb_p(saved_config & (~HP_DATAON), nic_base - NIC_OFFSET + HP_CONFIGURE);
384 return;
385 }
386
387 /* This function resets the ethercard if something screws up. */
388 static void __init
389 hp_init_card(struct net_device *dev)
390 {
391 int irq = dev->irq;
392 NS8390_init(dev, 0);
393 outb_p(irqmap[irq&0x0f] | HP_RUN,
394 dev->base_addr - NIC_OFFSET + HP_CONFIGURE);
395 return;
396 }
397
398 #ifdef MODULE
399 #define MAX_HP_CARDS 4 /* Max number of HP cards per module */
400 static struct net_device *dev_hp[MAX_HP_CARDS];
401 static int io[MAX_HP_CARDS];
402 static int irq[MAX_HP_CARDS];
403
404 module_param_array(io, int, NULL, 0);
405 module_param_array(irq, int, NULL, 0);
406 MODULE_PARM_DESC(io, "I/O base address(es)");
407 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
408 MODULE_DESCRIPTION("HP PC-LAN ISA ethernet driver");
409 MODULE_LICENSE("GPL");
410
411 /* This is set up so that only a single autoprobe takes place per call.
412 ISA device autoprobes on a running machine are not recommended. */
413 int __init
414 init_module(void)
415 {
416 struct net_device *dev;
417 int this_dev, found = 0;
418
419 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
420 if (io[this_dev] == 0) {
421 if (this_dev != 0) break; /* only autoprobe 1st one */
422 printk(KERN_NOTICE "hp.c: Presently autoprobing (not recommended) for a single card.\n");
423 }
424 dev = alloc_ei_netdev();
425 if (!dev)
426 break;
427 dev->irq = irq[this_dev];
428 dev->base_addr = io[this_dev];
429 if (do_hp_probe(dev) == 0) {
430 dev_hp[found++] = dev;
431 continue;
432 }
433 free_netdev(dev);
434 printk(KERN_WARNING "hp.c: No HP card found (i/o = 0x%x).\n", io[this_dev]);
435 break;
436 }
437 if (found)
438 return 0;
439 return -ENXIO;
440 }
441
442 static void cleanup_card(struct net_device *dev)
443 {
444 free_irq(dev->irq, dev);
445 release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
446 }
447
448 void __exit
449 cleanup_module(void)
450 {
451 int this_dev;
452
453 for (this_dev = 0; this_dev < MAX_HP_CARDS; this_dev++) {
454 struct net_device *dev = dev_hp[this_dev];
455 if (dev) {
456 unregister_netdev(dev);
457 cleanup_card(dev);
458 free_netdev(dev);
459 }
460 }
461 }
462 #endif /* MODULE */
WRT350N Kernel Patches