Root/drivers/net/ne2.c

1/* ne2.c: A NE/2 Ethernet Driver for Linux. */
2/*
3   Based on the NE2000 driver written by Donald Becker (1992-94).
4   modified by Wim Dumon (Apr 1996)
5
6   This software may be used and distributed according to the terms
7   of the GNU General Public License, incorporated herein by reference.
8
9   The author may be reached as wimpie@linux.cc.kuleuven.ac.be
10
11   Currently supported: NE/2
12   This patch was never tested on other MCA-ethernet adapters, but it
13   might work. Just give it a try and let me know if you have problems.
14   Also mail me if it really works, please!
15
16   Changelog:
17   Mon Feb 3 16:26:02 MET 1997
18   - adapted the driver to work with the 2.1.25 kernel
19   - multiple ne2 support (untested)
20   - module support (untested)
21
22   Fri Aug 28 00:18:36 CET 1998 (David Weinehall)
23   - fixed a few minor typos
24   - made the MODULE_PARM conditional (it only works with the v2.1.x kernels)
25   - fixed the module support (Now it's working...)
26
27   Mon Sep 7 19:01:44 CET 1998 (David Weinehall)
28   - added support for Arco Electronics AE/2-card (experimental)
29
30   Mon Sep 14 09:53:42 CET 1998 (David Weinehall)
31   - added support for Compex ENET-16MC/P (experimental)
32
33   Tue Sep 15 16:21:12 CET 1998 (David Weinehall, Magnus Jonsson, Tomas Ogren)
34   - Miscellaneous bugfixes
35
36   Tue Sep 19 16:21:12 CET 1998 (Magnus Jonsson)
37   - Cleanup
38
39   Wed Sep 23 14:33:34 CET 1998 (David Weinehall)
40   - Restructuring and rewriting for v2.1.x compliance
41
42   Wed Oct 14 17:19:21 CET 1998 (David Weinehall)
43   - Added code that unregisters irq and proc-info
44   - Version# bump
45
46   Mon Nov 16 15:28:23 CET 1998 (Wim Dumon)
47   - pass 'dev' as last parameter of request_irq in stead of 'NULL'
48
49   Wed Feb 7 21:24:00 CET 2001 (Alfred Arnold)
50   - added support for the D-Link DE-320CT
51
52   * WARNING
53    -------
54    This is alpha-test software. It is not guaranteed to work. As a
55    matter of fact, I'm quite sure there are *LOTS* of bugs in here. I
56    would like to hear from you if you use this driver, even if it works.
57    If it doesn't work, be sure to send me a mail with the problems !
58*/
59
60static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n";
61
62#include <linux/module.h>
63#include <linux/kernel.h>
64#include <linux/types.h>
65#include <linux/fcntl.h>
66#include <linux/interrupt.h>
67#include <linux/ioport.h>
68#include <linux/in.h>
69#include <linux/slab.h>
70#include <linux/string.h>
71#include <linux/errno.h>
72#include <linux/init.h>
73#include <linux/mca-legacy.h>
74#include <linux/netdevice.h>
75#include <linux/etherdevice.h>
76#include <linux/skbuff.h>
77#include <linux/bitops.h>
78#include <linux/jiffies.h>
79
80#include <asm/system.h>
81#include <asm/io.h>
82#include <asm/dma.h>
83
84#include "8390.h"
85
86#define DRV_NAME "ne2"
87
88/* Some defines that people can play with if so inclined. */
89
90/* Do we perform extra sanity checks on stuff ? */
91/* #define NE_SANITY_CHECK */
92
93/* Do we implement the read before write bugfix ? */
94/* #define NE_RW_BUGFIX */
95
96/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
97/* #define PACKETBUF_MEMSIZE 0x40 */
98
99
100/* ---- No user-serviceable parts below ---- */
101
102#define NE_BASE (dev->base_addr)
103#define NE_CMD 0x00
104#define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
105#define NE_RESET 0x20 /* Issue a read to reset, a write to clear. */
106#define NE_IO_EXTENT 0x30
107
108#define NE1SM_START_PG 0x20 /* First page of TX buffer */
109#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
110#define NESM_START_PG 0x40 /* First page of TX buffer */
111#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
112
113/* From the .ADF file: */
114static unsigned int addresses[7] __initdata =
115        {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
116static int irqs[4] __initdata = {3, 4, 5, 9};
117
118/* From the D-Link ADF file: */
119static unsigned int dlink_addresses[4] __initdata =
120                {0x300, 0x320, 0x340, 0x360};
121static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
122
123struct ne2_adapters_t {
124    unsigned int id;
125    char *name;
126};
127
128static struct ne2_adapters_t ne2_adapters[] __initdata = {
129    { 0x6354, "Arco Ethernet Adapter AE/2" },
130    { 0x70DE, "Compex ENET-16 MC/P" },
131    { 0x7154, "Novell Ethernet Adapter NE/2" },
132        { 0x56ea, "D-Link DE-320CT" },
133    { 0x0000, NULL }
134};
135
136extern int netcard_probe(struct net_device *dev);
137
138static int ne2_probe1(struct net_device *dev, int slot);
139
140static void ne_reset_8390(struct net_device *dev);
141static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
142        int ring_page);
143static void ne_block_input(struct net_device *dev, int count,
144        struct sk_buff *skb, int ring_offset);
145static void ne_block_output(struct net_device *dev, const int count,
146        const unsigned char *buf, const int start_page);
147
148
149/*
150 * special code to read the DE-320's MAC address EEPROM. In contrast to a
151 * standard NE design, this is a serial EEPROM (93C46) that has to be read
152 * bit by bit. The EEPROM cotrol port at base + 0x1e has the following
153 * layout:
154 *
155 * Bit 0 = Data out (read from EEPROM)
156 * Bit 1 = Data in (write to EEPROM)
157 * Bit 2 = Clock
158 * Bit 3 = Chip Select
159 * Bit 7 = ~50 kHz clock for defined delays
160 *
161 */
162
163static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
164{
165    int z;
166    unsigned char v1, v2;
167
168    /* write the value to the NIC EEPROM register */
169
170    outb(value, addr + 0x1e);
171
172    /* now wait the clock line to toggle twice. Effectively, we are
173       waiting (at least) for one clock cycle */
174
175    for (z = 0; z < 2; z++) {
176        do {
177            v1 = inb(addr + 0x1e);
178            v2 = inb(addr + 0x1e);
179        }
180        while (!((v1 ^ v2) & 0x80));
181    }
182}
183
184static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
185{
186    /* shift data bit into correct position */
187
188    bit = bit << 1;
189
190    /* write value, keep clock line high for two cycles */
191
192    dlink_put_eeprom(0x09 | bit, addr);
193    dlink_put_eeprom(0x0d | bit, addr);
194    dlink_put_eeprom(0x0d | bit, addr);
195    dlink_put_eeprom(0x09 | bit, addr);
196}
197
198static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
199{
200    int z;
201
202    /* adjust bits so that they are left-aligned in a 16-bit-word */
203
204    value = value << (16 - len);
205
206    /* shift bits out to the EEPROM */
207
208    for (z = 0; z < len; z++) {
209        dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
210        value = value << 1;
211    }
212}
213
214static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
215{
216    int z;
217    unsigned int value = 0;
218
219    /* pull the CS line low for a moment. This resets the EEPROM-
220       internal logic, and makes it ready for a new command. */
221
222    dlink_put_eeprom(0x01, addr);
223    dlink_put_eeprom(0x09, addr);
224
225    /* send one start bit, read command (1 - 0), plus the address to
226           the EEPROM */
227
228    dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
229
230    /* get the data word. We clock by sending 0s to the EEPROM, which
231       get ignored during the read process */
232
233    for (z = 0; z < 16; z++) {
234        dlink_send_eeprom_bit(0, addr);
235        value = (value << 1) | (inb(addr + 0x1e) & 0x01);
236    }
237
238    return value;
239}
240
241/*
242 * Note that at boot, this probe only picks up one card at a time.
243 */
244
245static int __init do_ne2_probe(struct net_device *dev)
246{
247    static int current_mca_slot = -1;
248    int i;
249    int adapter_found = 0;
250
251    /* Do not check any supplied i/o locations.
252       POS registers usually don't fail :) */
253
254    /* MCA cards have POS registers.
255       Autodetecting MCA cards is extremely simple.
256       Just search for the card. */
257
258    for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
259        current_mca_slot =
260            mca_find_unused_adapter(ne2_adapters[i].id, 0);
261
262        if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
263            int res;
264            mca_set_adapter_name(current_mca_slot,
265                    ne2_adapters[i].name);
266            mca_mark_as_used(current_mca_slot);
267
268            res = ne2_probe1(dev, current_mca_slot);
269            if (res)
270                mca_mark_as_unused(current_mca_slot);
271            return res;
272        }
273    }
274    return -ENODEV;
275}
276
277#ifndef MODULE
278struct net_device * __init ne2_probe(int unit)
279{
280    struct net_device *dev = alloc_eip_netdev();
281    int err;
282
283    if (!dev)
284        return ERR_PTR(-ENOMEM);
285
286    sprintf(dev->name, "eth%d", unit);
287    netdev_boot_setup_check(dev);
288
289    err = do_ne2_probe(dev);
290    if (err)
291        goto out;
292    return dev;
293out:
294    free_netdev(dev);
295    return ERR_PTR(err);
296}
297#endif
298
299static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
300{
301    int len=0;
302
303    len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
304    len += sprintf(buf+len, "Driver written by Wim Dumon ");
305    len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
306    len += sprintf(buf+len, "Modified by ");
307    len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
308    len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
309    len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
310    len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
311    len += sprintf(buf+len, "IRQ : %d\n", dev->irq);
312    len += sprintf(buf+len, "HW addr : %pM\n", dev->dev_addr);
313
314    return len;
315}
316
317static int __init ne2_probe1(struct net_device *dev, int slot)
318{
319    int i, base_addr, irq, retval;
320    unsigned char POS;
321    unsigned char SA_prom[32];
322    const char *name = "NE/2";
323    int start_page, stop_page;
324    static unsigned version_printed;
325
326    if (ei_debug && version_printed++ == 0)
327        printk(version);
328
329    printk("NE/2 ethercard found in slot %d:", slot);
330
331    /* Read base IO and IRQ from the POS-registers */
332    POS = mca_read_stored_pos(slot, 2);
333    if(!(POS % 2)) {
334        printk(" disabled.\n");
335        return -ENODEV;
336    }
337
338    /* handle different POS register structure for D-Link card */
339
340    if (mca_read_stored_pos(slot, 0) == 0xea) {
341        base_addr = dlink_addresses[(POS >> 5) & 0x03];
342        irq = dlink_irqs[(POS >> 2) & 0x07];
343    }
344        else {
345        i = (POS & 0xE)>>1;
346        /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
347           " en zou het moeten werken -> %d\n", i);
348           The above line was for remote testing, thanx to sdog ... */
349        base_addr = addresses[i - 1];
350        irq = irqs[(POS & 0x60)>>5];
351    }
352
353    if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
354        return -EBUSY;
355
356#ifdef DEBUG
357    printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
358            base_addr, irq);
359#endif
360
361#ifndef CRYNWR_WAY
362    /* Reset the card the way they do it in the Crynwr packet driver */
363    for (i=0; i<8; i++)
364        outb(0x0, base_addr + NE_RESET);
365    inb(base_addr + NE_RESET);
366    outb(0x21, base_addr + NE_CMD);
367    if (inb(base_addr + NE_CMD) != 0x21) {
368        printk("NE/2 adapter not responding\n");
369        retval = -ENODEV;
370        goto out;
371    }
372
373    /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
374       my RAM is okay. Suppose your memory is broken. Then this test
375       should fail and you won't be able to use your card. But if I do not
376       test, you won't be able to use your card, neither. So this test
377       won't help you. */
378
379#else /* _I_ never tested it this way .. Go ahead and try ...*/
380    /* Reset card. Who knows what dain-bramaged state it was left in. */
381    {
382        unsigned long reset_start_time = jiffies;
383
384        /* DON'T change these to inb_p/outb_p or reset will fail on
385           clones.. */
386        outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
387
388        while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
389            if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
390                printk(" not found (no reset ack).\n");
391                retval = -ENODEV;
392                goto out;
393            }
394
395        outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */
396    }
397#endif
398
399
400    /* Read the 16 bytes of station address PROM.
401       We must first initialize registers, similar to
402       NS8390p_init(eifdev, 0).
403       We can't reliably read the SAPROM address without this.
404       (I learned the hard way!). */
405    {
406        struct {
407            unsigned char value, offset;
408        } program_seq[] = {
409                        /* Select page 0 */
410            {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
411            {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */
412            {0x00, EN0_RCNTLO}, /* Clear the count regs. */
413            {0x00, EN0_RCNTHI},
414            {0x00, EN0_IMR}, /* Mask completion irq. */
415            {0xFF, EN0_ISR},
416            {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
417            {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
418            {32, EN0_RCNTLO},
419            {0x00, EN0_RCNTHI},
420            {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
421            {0x00, EN0_RSARHI},
422            {E8390_RREAD+E8390_START, E8390_CMD},
423        };
424
425        for (i = 0; i < ARRAY_SIZE(program_seq); i++)
426            outb_p(program_seq[i].value, base_addr +
427                program_seq[i].offset);
428
429    }
430    for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
431        SA_prom[i] = inb(base_addr + NE_DATAPORT);
432    }
433
434    /* I don't know whether the previous sequence includes the general
435           board reset procedure, so better don't omit it and just overwrite
436           the garbage read from a DE-320 with correct stuff. */
437
438    if (mca_read_stored_pos(slot, 0) == 0xea) {
439        unsigned int v;
440
441        for (i = 0; i < 3; i++) {
442             v = dlink_get_eeprom(i, base_addr);
443            SA_prom[(i << 1) ] = v & 0xff;
444            SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
445        }
446    }
447
448    start_page = NESM_START_PG;
449    stop_page = NESM_STOP_PG;
450
451    dev->irq=irq;
452
453    /* Snarf the interrupt now. There's no point in waiting since we cannot
454       share and the board will usually be enabled. */
455    retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev);
456    if (retval) {
457        printk (" unable to get IRQ %d (irqval=%d).\n",
458                dev->irq, retval);
459        goto out;
460    }
461
462    dev->base_addr = base_addr;
463
464    for(i = 0; i < ETHER_ADDR_LEN; i++)
465        dev->dev_addr[i] = SA_prom[i];
466
467    printk(" %pM\n", dev->dev_addr);
468
469    printk("%s: %s found at %#x, using IRQ %d.\n",
470            dev->name, name, base_addr, dev->irq);
471
472    mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
473
474    ei_status.name = name;
475    ei_status.tx_start_page = start_page;
476    ei_status.stop_page = stop_page;
477    ei_status.word16 = (2 == 2);
478
479    ei_status.rx_start_page = start_page + TX_PAGES;
480#ifdef PACKETBUF_MEMSIZE
481    /* Allow the packet buffer size to be overridden by know-it-alls. */
482    ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
483#endif
484
485    ei_status.reset_8390 = &ne_reset_8390;
486    ei_status.block_input = &ne_block_input;
487    ei_status.block_output = &ne_block_output;
488    ei_status.get_8390_hdr = &ne_get_8390_hdr;
489
490    ei_status.priv = slot;
491
492    dev->netdev_ops = &eip_netdev_ops;
493    NS8390p_init(dev, 0);
494
495    retval = register_netdev(dev);
496    if (retval)
497        goto out1;
498    return 0;
499out1:
500    mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
501    free_irq(dev->irq, dev);
502out:
503    release_region(base_addr, NE_IO_EXTENT);
504    return retval;
505}
506
507/* Hard reset the card. This used to pause for the same period that a
508   8390 reset command required, but that shouldn't be necessary. */
509static void ne_reset_8390(struct net_device *dev)
510{
511    unsigned long reset_start_time = jiffies;
512
513    if (ei_debug > 1)
514        printk("resetting the 8390 t=%ld...", jiffies);
515
516    /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
517    outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
518
519    ei_status.txing = 0;
520    ei_status.dmaing = 0;
521
522    /* This check _should_not_ be necessary, omit eventually. */
523    while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
524        if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
525            printk("%s: ne_reset_8390() did not complete.\n",
526                    dev->name);
527            break;
528        }
529    outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
530}
531
532/* Grab the 8390 specific header. Similar to the block_input routine, but
533   we don't need to be concerned with ring wrap as the header will be at
534   the start of a page, so we optimize accordingly. */
535
536static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
537        int ring_page)
538{
539
540    int nic_base = dev->base_addr;
541
542    /* This *shouldn't* happen.
543       If it does, it's the last thing you'll see */
544    if (ei_status.dmaing) {
545        printk("%s: DMAing conflict in ne_get_8390_hdr "
546                "[DMAstat:%d][irqlock:%d].\n",
547                dev->name, ei_status.dmaing, ei_status.irqlock);
548        return;
549    }
550
551    ei_status.dmaing |= 0x01;
552    outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
553    outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
554    outb_p(0, nic_base + EN0_RCNTHI);
555    outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
556    outb_p(ring_page, nic_base + EN0_RSARHI);
557    outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
558
559    if (ei_status.word16)
560        insw(NE_BASE + NE_DATAPORT, hdr,
561                sizeof(struct e8390_pkt_hdr)>>1);
562    else
563        insb(NE_BASE + NE_DATAPORT, hdr,
564                sizeof(struct e8390_pkt_hdr));
565
566    outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
567    ei_status.dmaing &= ~0x01;
568}
569
570/* Block input and output, similar to the Crynwr packet driver. If you
571   are porting to a new ethercard, look at the packet driver source for
572   hints. The NEx000 doesn't share the on-board packet memory -- you have
573   to put the packet out through the "remote DMA" dataport using outb. */
574
575static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
576        int ring_offset)
577{
578#ifdef NE_SANITY_CHECK
579    int xfer_count = count;
580#endif
581    int nic_base = dev->base_addr;
582    char *buf = skb->data;
583
584    /* This *shouldn't* happen.
585       If it does, it's the last thing you'll see */
586    if (ei_status.dmaing) {
587        printk("%s: DMAing conflict in ne_block_input "
588                "[DMAstat:%d][irqlock:%d].\n",
589                dev->name, ei_status.dmaing, ei_status.irqlock);
590        return;
591    }
592    ei_status.dmaing |= 0x01;
593    outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
594    outb_p(count & 0xff, nic_base + EN0_RCNTLO);
595    outb_p(count >> 8, nic_base + EN0_RCNTHI);
596    outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
597    outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
598    outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
599    if (ei_status.word16) {
600        insw(NE_BASE + NE_DATAPORT,buf,count>>1);
601        if (count & 0x01) {
602            buf[count-1] = inb(NE_BASE + NE_DATAPORT);
603#ifdef NE_SANITY_CHECK
604            xfer_count++;
605#endif
606        }
607    } else {
608        insb(NE_BASE + NE_DATAPORT, buf, count);
609    }
610
611#ifdef NE_SANITY_CHECK
612    /* This was for the ALPHA version only, but enough people have
613       been encountering problems so it is still here. If you see
614       this message you either 1) have a slightly incompatible clone
615       or 2) have noise/speed problems with your bus. */
616    if (ei_debug > 1) { /* DMA termination address check... */
617        int addr, tries = 20;
618        do {
619            /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
620               -- it's broken for Rx on some cards! */
621            int high = inb_p(nic_base + EN0_RSARHI);
622            int low = inb_p(nic_base + EN0_RSARLO);
623            addr = (high << 8) + low;
624            if (((ring_offset + xfer_count) & 0xff) == low)
625                break;
626        } while (--tries > 0);
627        if (tries <= 0)
628            printk("%s: RX transfer address mismatch,"
629                "%#4.4x (expected) vs. %#4.4x (actual).\n",
630                dev->name, ring_offset + xfer_count, addr);
631    }
632#endif
633    outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
634    ei_status.dmaing &= ~0x01;
635}
636
637static void ne_block_output(struct net_device *dev, int count,
638        const unsigned char *buf, const int start_page)
639{
640    int nic_base = NE_BASE;
641    unsigned long dma_start;
642#ifdef NE_SANITY_CHECK
643    int retries = 0;
644#endif
645
646    /* Round the count up for word writes. Do we need to do this?
647       What effect will an odd byte count have on the 8390?
648       I should check someday. */
649    if (ei_status.word16 && (count & 0x01))
650        count++;
651
652    /* This *shouldn't* happen.
653       If it does, it's the last thing you'll see */
654    if (ei_status.dmaing) {
655        printk("%s: DMAing conflict in ne_block_output."
656                "[DMAstat:%d][irqlock:%d]\n",
657                dev->name, ei_status.dmaing, ei_status.irqlock);
658        return;
659    }
660    ei_status.dmaing |= 0x01;
661    /* We should already be in page 0, but to be safe... */
662    outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
663
664#ifdef NE_SANITY_CHECK
665retry:
666#endif
667
668#ifdef NE8390_RW_BUGFIX
669    /* Handle the read-before-write bug the same way as the
670       Crynwr packet driver -- the NatSemi method doesn't work.
671       Actually this doesn't always work either, but if you have
672       problems with your NEx000 this is better than nothing! */
673    outb_p(0x42, nic_base + EN0_RCNTLO);
674    outb_p(0x00, nic_base + EN0_RCNTHI);
675    outb_p(0x42, nic_base + EN0_RSARLO);
676    outb_p(0x00, nic_base + EN0_RSARHI);
677    outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
678    /* Make certain that the dummy read has occurred. */
679    SLOW_DOWN_IO;
680    SLOW_DOWN_IO;
681    SLOW_DOWN_IO;
682#endif
683
684    outb_p(ENISR_RDC, nic_base + EN0_ISR);
685
686    /* Now the normal output. */
687    outb_p(count & 0xff, nic_base + EN0_RCNTLO);
688    outb_p(count >> 8, nic_base + EN0_RCNTHI);
689    outb_p(0x00, nic_base + EN0_RSARLO);
690    outb_p(start_page, nic_base + EN0_RSARHI);
691
692    outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
693    if (ei_status.word16) {
694        outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
695    } else {
696        outsb(NE_BASE + NE_DATAPORT, buf, count);
697    }
698
699    dma_start = jiffies;
700
701#ifdef NE_SANITY_CHECK
702    /* This was for the ALPHA version only, but enough people have
703       been encountering problems so it is still here. */
704
705    if (ei_debug > 1) { /* DMA termination address check... */
706        int addr, tries = 20;
707        do {
708            int high = inb_p(nic_base + EN0_RSARHI);
709            int low = inb_p(nic_base + EN0_RSARLO);
710            addr = (high << 8) + low;
711            if ((start_page << 8) + count == addr)
712                break;
713        } while (--tries > 0);
714        if (tries <= 0) {
715            printk("%s: Tx packet transfer address mismatch,"
716                    "%#4.4x (expected) vs. %#4.4x (actual).\n",
717                    dev->name, (start_page << 8) + count, addr);
718            if (retries++ == 0)
719                goto retry;
720        }
721    }
722#endif
723
724    while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
725        if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
726            printk("%s: timeout waiting for Tx RDC.\n", dev->name);
727            ne_reset_8390(dev);
728            NS8390p_init(dev, 1);
729            break;
730        }
731
732    outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
733    ei_status.dmaing &= ~0x01;
734    return;
735}
736
737
738#ifdef MODULE
739#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
740static struct net_device *dev_ne[MAX_NE_CARDS];
741static int io[MAX_NE_CARDS];
742static int irq[MAX_NE_CARDS];
743static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
744MODULE_LICENSE("GPL");
745
746module_param_array(io, int, NULL, 0);
747module_param_array(irq, int, NULL, 0);
748module_param_array(bad, int, NULL, 0);
749MODULE_PARM_DESC(io, "(ignored)");
750MODULE_PARM_DESC(irq, "(ignored)");
751MODULE_PARM_DESC(bad, "(ignored)");
752
753/* Module code fixed by David Weinehall */
754
755int __init init_module(void)
756{
757    struct net_device *dev;
758    int this_dev, found = 0;
759
760    for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
761        dev = alloc_eip_netdev();
762        if (!dev)
763            break;
764        dev->irq = irq[this_dev];
765        dev->mem_end = bad[this_dev];
766        dev->base_addr = io[this_dev];
767        if (do_ne2_probe(dev) == 0) {
768            dev_ne[found++] = dev;
769            continue;
770        }
771        free_netdev(dev);
772        break;
773    }
774    if (found)
775        return 0;
776    printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
777    return -ENXIO;
778}
779
780static void cleanup_card(struct net_device *dev)
781{
782    mca_mark_as_unused(ei_status.priv);
783    mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
784    free_irq(dev->irq, dev);
785    release_region(dev->base_addr, NE_IO_EXTENT);
786}
787
788void __exit cleanup_module(void)
789{
790    int this_dev;
791
792    for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
793        struct net_device *dev = dev_ne[this_dev];
794        if (dev) {
795            unregister_netdev(dev);
796            cleanup_card(dev);
797            free_netdev(dev);
798        }
799    }
800}
801#endif /* MODULE */
802

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.2
jz-3.3
jz-3.4
jz47xx
jz47xx-2.6.38
master
xiangfu/openwrt/v3.0.0
xiangfu/openwrt/v3.2.1

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7



interactive