Root/drivers/net/smc-ultra.c

1/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
2/*
3    This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
4
5    Written 1993-1998 by Donald Becker.
6
7    Copyright 1993 United States Government as represented by the
8    Director, National Security Agency.
9
10    This software may be used and distributed according to the terms
11    of the GNU General Public License, incorporated herein by reference.
12
13    The author may be reached as becker@scyld.com, or C/O
14    Scyld Computing Corporation
15    410 Severn Ave., Suite 210
16    Annapolis MD 21403
17
18    This driver uses the cards in the 8390-compatible mode.
19    Most of the run-time complexity is handled by the generic code in
20    8390.c. The code in this file is responsible for
21
22        ultra_probe() Detecting and initializing the card.
23        ultra_probe1()
24        ultra_probe_isapnp()
25
26        ultra_open() The card-specific details of starting, stopping
27        ultra_reset_8390() and resetting the 8390 NIC core.
28        ultra_close()
29
30        ultra_block_input() Routines for reading and writing blocks of
31        ultra_block_output() packet buffer memory.
32        ultra_pio_input()
33        ultra_pio_output()
34
35    This driver enables the shared memory only when doing the actual data
36    transfers to avoid a bug in early version of the card that corrupted
37    data transferred by a AHA1542.
38
39    This driver now supports the programmed-I/O (PIO) data transfer mode of
40    the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
41    That support (if available) is in smc-ez.c.
42
43    Changelog:
44
45    Paul Gortmaker : multiple card support for module users.
46    Donald Becker : 4/17/96 PIO support, minor potential problems avoided.
47    Donald Becker : 6/6/96 correctly set auto-wrap bit.
48    Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
49
50    Note about the ISA PnP support:
51
52    This driver can not autoprobe for more than one SMC EtherEZ PnP card.
53    You have to configure the second card manually through the /proc/isapnp
54    interface and then load the module with an explicit io=0x___ option.
55*/
56
57static const char version[] =
58    "smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
59
60#include <linux/module.h>
61#include <linux/kernel.h>
62#include <linux/errno.h>
63#include <linux/string.h>
64#include <linux/init.h>
65#include <linux/isapnp.h>
66#include <linux/netdevice.h>
67#include <linux/etherdevice.h>
68
69#include <asm/io.h>
70#include <asm/irq.h>
71#include <asm/system.h>
72
73#include "8390.h"
74
75#define DRV_NAME "smc-ultra"
76
77/* A zero-terminated list of I/O addresses to be probed. */
78static unsigned int ultra_portlist[] __initdata =
79{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
80
81static int ultra_probe1(struct net_device *dev, int ioaddr);
82
83#ifdef __ISAPNP__
84static int ultra_probe_isapnp(struct net_device *dev);
85#endif
86
87static int ultra_open(struct net_device *dev);
88static void ultra_reset_8390(struct net_device *dev);
89static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
90                        int ring_page);
91static void ultra_block_input(struct net_device *dev, int count,
92                          struct sk_buff *skb, int ring_offset);
93static void ultra_block_output(struct net_device *dev, int count,
94                            const unsigned char *buf, const int start_page);
95static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
96                        int ring_page);
97static void ultra_pio_input(struct net_device *dev, int count,
98                          struct sk_buff *skb, int ring_offset);
99static void ultra_pio_output(struct net_device *dev, int count,
100                             const unsigned char *buf, const int start_page);
101static int ultra_close_card(struct net_device *dev);
102
103#ifdef __ISAPNP__
104static struct isapnp_device_id ultra_device_ids[] __initdata = {
105        { ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
106                ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
107                (long) "SMC EtherEZ (8416)" },
108        { } /* terminate list */
109};
110
111MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
112#endif
113
114
115#define START_PG 0x00 /* First page of TX buffer */
116
117#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
118#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
119#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
120#define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */
121#define IOPA 0x07 /* I/O Pipe Address for PIO operation. */
122#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
123#define ULTRA_IO_EXTENT 32
124#define EN0_ERWCNT 0x08 /* Early receive warning count. */
125
126#ifdef CONFIG_NET_POLL_CONTROLLER
127static void ultra_poll(struct net_device *dev)
128{
129    disable_irq(dev->irq);
130    ei_interrupt(dev->irq, dev);
131    enable_irq(dev->irq);
132}
133#endif
134/* Probe for the Ultra. This looks like a 8013 with the station
135    address PROM at I/O ports <base>+8 to <base>+13, with a checksum
136    following.
137*/
138
139static int __init do_ultra_probe(struct net_device *dev)
140{
141    int i;
142    int base_addr = dev->base_addr;
143    int irq = dev->irq;
144
145    if (base_addr > 0x1ff) /* Check a single specified location. */
146        return ultra_probe1(dev, base_addr);
147    else if (base_addr != 0) /* Don't probe at all. */
148        return -ENXIO;
149
150#ifdef __ISAPNP__
151    /* Look for any installed ISAPnP cards */
152    if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
153        return 0;
154#endif
155
156    for (i = 0; ultra_portlist[i]; i++) {
157        dev->irq = irq;
158        if (ultra_probe1(dev, ultra_portlist[i]) == 0)
159            return 0;
160    }
161
162    return -ENODEV;
163}
164
165#ifndef MODULE
166struct net_device * __init ultra_probe(int unit)
167{
168    struct net_device *dev = alloc_ei_netdev();
169    int err;
170
171    if (!dev)
172        return ERR_PTR(-ENOMEM);
173
174    sprintf(dev->name, "eth%d", unit);
175    netdev_boot_setup_check(dev);
176
177    err = do_ultra_probe(dev);
178    if (err)
179        goto out;
180    return dev;
181out:
182    free_netdev(dev);
183    return ERR_PTR(err);
184}
185#endif
186
187static const struct net_device_ops ultra_netdev_ops = {
188    .ndo_open = ultra_open,
189    .ndo_stop = ultra_close_card,
190
191    .ndo_start_xmit = ei_start_xmit,
192    .ndo_tx_timeout = ei_tx_timeout,
193    .ndo_get_stats = ei_get_stats,
194    .ndo_set_multicast_list = ei_set_multicast_list,
195    .ndo_validate_addr = eth_validate_addr,
196    .ndo_set_mac_address = eth_mac_addr,
197    .ndo_change_mtu = eth_change_mtu,
198#ifdef CONFIG_NET_POLL_CONTROLLER
199    .ndo_poll_controller = ultra_poll,
200#endif
201};
202
203static int __init ultra_probe1(struct net_device *dev, int ioaddr)
204{
205    int i, retval;
206    int checksum = 0;
207    const char *model_name;
208    unsigned char eeprom_irq = 0;
209    static unsigned version_printed;
210    /* Values from various config regs. */
211    unsigned char num_pages, irqreg, addr, piomode;
212    unsigned char idreg = inb(ioaddr + 7);
213    unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
214
215    if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
216        return -EBUSY;
217
218    /* Check the ID nibble. */
219    if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
220        && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
221        retval = -ENODEV;
222        goto out;
223    }
224
225    /* Select the station address register set. */
226    outb(reg4, ioaddr + 4);
227
228    for (i = 0; i < 8; i++)
229        checksum += inb(ioaddr + 8 + i);
230    if ((checksum & 0xff) != 0xFF) {
231        retval = -ENODEV;
232        goto out;
233    }
234
235    if (ei_debug && version_printed++ == 0)
236        printk(version);
237
238    model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
239
240    for (i = 0; i < 6; i++)
241        dev->dev_addr[i] = inb(ioaddr + 8 + i);
242
243    printk("%s: %s at %#3x, %pM", dev->name, model_name,
244           ioaddr, dev->dev_addr);
245
246    /* Switch from the station address to the alternate register set and
247       read the useful registers there. */
248    outb(0x80 | reg4, ioaddr + 4);
249
250    /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
251    outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
252    piomode = inb(ioaddr + 0x8);
253    addr = inb(ioaddr + 0xb);
254    irqreg = inb(ioaddr + 0xd);
255
256    /* Switch back to the station address register set so that the MS-DOS driver
257       can find the card after a warm boot. */
258    outb(reg4, ioaddr + 4);
259
260    if (dev->irq < 2) {
261        unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
262        int irq;
263
264        /* The IRQ bits are split. */
265        irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
266
267        if (irq == 0) {
268            printk(", failed to detect IRQ line.\n");
269            retval = -EAGAIN;
270            goto out;
271        }
272        dev->irq = irq;
273        eeprom_irq = 1;
274    }
275
276    /* The 8390 isn't at the base address, so fake the offset */
277    dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
278
279    {
280        int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
281        short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
282
283        dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
284        num_pages = num_pages_tbl[(addr >> 4) & 3];
285    }
286
287    ei_status.name = model_name;
288    ei_status.word16 = 1;
289    ei_status.tx_start_page = START_PG;
290    ei_status.rx_start_page = START_PG + TX_PAGES;
291    ei_status.stop_page = num_pages;
292
293    ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
294    if (!ei_status.mem) {
295        printk(", failed to ioremap.\n");
296        retval = -ENOMEM;
297        goto out;
298    }
299
300    dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
301
302    if (piomode) {
303        printk(",%s IRQ %d programmed-I/O mode.\n",
304               eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
305        ei_status.block_input = &ultra_pio_input;
306        ei_status.block_output = &ultra_pio_output;
307        ei_status.get_8390_hdr = &ultra_pio_get_hdr;
308    } else {
309        printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
310               dev->irq, dev->mem_start, dev->mem_end-1);
311        ei_status.block_input = &ultra_block_input;
312        ei_status.block_output = &ultra_block_output;
313        ei_status.get_8390_hdr = &ultra_get_8390_hdr;
314    }
315    ei_status.reset_8390 = &ultra_reset_8390;
316
317    dev->netdev_ops = &ultra_netdev_ops;
318    NS8390_init(dev, 0);
319
320    retval = register_netdev(dev);
321    if (retval)
322        goto out;
323    return 0;
324out:
325    release_region(ioaddr, ULTRA_IO_EXTENT);
326    return retval;
327}
328
329#ifdef __ISAPNP__
330static int __init ultra_probe_isapnp(struct net_device *dev)
331{
332        int i;
333
334        for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
335        struct pnp_dev *idev = NULL;
336
337                while ((idev = pnp_find_dev(NULL,
338                                            ultra_device_ids[i].vendor,
339                                            ultra_device_ids[i].function,
340                                            idev))) {
341                        /* Avoid already found cards from previous calls */
342                        if (pnp_device_attach(idev) < 0)
343                            continue;
344                        if (pnp_activate_dev(idev) < 0) {
345                              __again:
346                            pnp_device_detach(idev);
347                            continue;
348                        }
349            /* if no io and irq, search for next */
350            if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
351                goto __again;
352                        /* found it */
353            dev->base_addr = pnp_port_start(idev, 0);
354            dev->irq = pnp_irq(idev, 0);
355                        printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
356                                (char *) ultra_device_ids[i].driver_data,
357                                dev->base_addr, dev->irq);
358                        if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
359                                printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
360                                pnp_device_detach(idev);
361                return -ENXIO;
362                        }
363                        ei_status.priv = (unsigned long)idev;
364                        break;
365                }
366                if (!idev)
367                        continue;
368                return 0;
369        }
370
371        return -ENODEV;
372}
373#endif
374
375static int
376ultra_open(struct net_device *dev)
377{
378    int retval;
379    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
380    unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
381                   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
382
383    retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
384    if (retval)
385        return retval;
386
387    outb(0x00, ioaddr); /* Disable shared memory for safety. */
388    outb(0x80, ioaddr + 5);
389    /* Set the IRQ line. */
390    outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
391    outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
392    outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
393
394    if (ei_status.block_input == &ultra_pio_input) {
395        outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
396        outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
397    } else
398        outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
399    /* Set the early receive warning level in window 0 high enough not
400       to receive ERW interrupts. */
401    outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
402    outb(0xff, dev->base_addr + EN0_ERWCNT);
403    ei_open(dev);
404    return 0;
405}
406
407static void
408ultra_reset_8390(struct net_device *dev)
409{
410    int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
411
412    outb(ULTRA_RESET, cmd_port);
413    if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
414    ei_status.txing = 0;
415
416    outb(0x00, cmd_port); /* Disable shared memory for safety. */
417    outb(0x80, cmd_port + 5);
418    if (ei_status.block_input == &ultra_pio_input)
419        outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
420    else
421        outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
422
423    if (ei_debug > 1) printk("reset done\n");
424    return;
425}
426
427/* Grab the 8390 specific header. Similar to the block_input routine, but
428   we don't need to be concerned with ring wrap as the header will be at
429   the start of a page, so we optimize accordingly. */
430
431static void
432ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
433{
434    void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
435
436    outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
437#ifdef __BIG_ENDIAN
438    /* Officially this is what we are doing, but the readl() is faster */
439    /* unfortunately it isn't endian aware of the struct */
440    memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
441    hdr->count = le16_to_cpu(hdr->count);
442#else
443    ((unsigned int*)hdr)[0] = readl(hdr_start);
444#endif
445    outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
446}
447
448/* Block input and output are easy on shared memory ethercards, the only
449   complication is when the ring buffer wraps. */
450
451static void
452ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
453{
454    void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
455
456    /* Enable shared memory. */
457    outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
458
459    if (ring_offset + count > ei_status.stop_page*256) {
460        /* We must wrap the input move. */
461        int semi_count = ei_status.stop_page*256 - ring_offset;
462        memcpy_fromio(skb->data, xfer_start, semi_count);
463        count -= semi_count;
464        memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
465    } else {
466        memcpy_fromio(skb->data, xfer_start, count);
467    }
468
469    outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
470}
471
472static void
473ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
474                int start_page)
475{
476    void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
477
478    /* Enable shared memory. */
479    outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
480
481    memcpy_toio(shmem, buf, count);
482
483    outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
484}
485
486/* The identical operations for programmed I/O cards.
487   The PIO model is trivial to use: the 16 bit start address is written
488   byte-sequentially to IOPA, with no intervening I/O operations, and the
489   data is read or written to the IOPD data port.
490   The only potential complication is that the address register is shared
491   and must be always be rewritten between each read/write direction change.
492   This is no problem for us, as the 8390 code ensures that we are single
493   threaded. */
494static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
495                        int ring_page)
496{
497    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
498    outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
499    outb(ring_page, ioaddr + IOPA);
500    insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
501}
502
503static void ultra_pio_input(struct net_device *dev, int count,
504                          struct sk_buff *skb, int ring_offset)
505{
506    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
507    char *buf = skb->data;
508
509    /* For now set the address again, although it should already be correct. */
510    outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
511    outb(ring_offset >> 8, ioaddr + IOPA);
512    /* We know skbuffs are padded to at least word alignment. */
513    insw(ioaddr + IOPD, buf, (count+1)>>1);
514}
515
516static void ultra_pio_output(struct net_device *dev, int count,
517                            const unsigned char *buf, const int start_page)
518{
519    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
520    outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
521    outb(start_page, ioaddr + IOPA);
522    /* An extra odd byte is OK here as well. */
523    outsw(ioaddr + IOPD, buf, (count+1)>>1);
524}
525
526static int
527ultra_close_card(struct net_device *dev)
528{
529    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
530
531    netif_stop_queue(dev);
532
533    if (ei_debug > 1)
534        printk("%s: Shutting down ethercard.\n", dev->name);
535
536    outb(0x00, ioaddr + 6); /* Disable interrupts. */
537    free_irq(dev->irq, dev);
538
539    NS8390_init(dev, 0);
540
541    /* We should someday disable shared memory and change to 8-bit mode
542       "just in case"... */
543
544    return 0;
545}
546
547
548#ifdef MODULE
549#define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
550static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
551static int io[MAX_ULTRA_CARDS];
552static int irq[MAX_ULTRA_CARDS];
553
554module_param_array(io, int, NULL, 0);
555module_param_array(irq, int, NULL, 0);
556MODULE_PARM_DESC(io, "I/O base address(es)");
557MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
558MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
559MODULE_LICENSE("GPL");
560
561/* This is set up so that only a single autoprobe takes place per call.
562ISA device autoprobes on a running machine are not recommended. */
563int __init
564init_module(void)
565{
566    struct net_device *dev;
567    int this_dev, found = 0;
568
569    for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
570        if (io[this_dev] == 0) {
571            if (this_dev != 0) break; /* only autoprobe 1st one */
572            printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
573        }
574        dev = alloc_ei_netdev();
575        if (!dev)
576            break;
577        dev->irq = irq[this_dev];
578        dev->base_addr = io[this_dev];
579        if (do_ultra_probe(dev) == 0) {
580            dev_ultra[found++] = dev;
581            continue;
582        }
583        free_netdev(dev);
584        printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
585        break;
586    }
587    if (found)
588        return 0;
589    return -ENXIO;
590}
591
592static void cleanup_card(struct net_device *dev)
593{
594    /* NB: ultra_close_card() does free_irq */
595#ifdef __ISAPNP__
596    struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
597    if (idev)
598        pnp_device_detach(idev);
599#endif
600    release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
601    iounmap(ei_status.mem);
602}
603
604void __exit
605cleanup_module(void)
606{
607    int this_dev;
608
609    for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
610        struct net_device *dev = dev_ultra[this_dev];
611        if (dev) {
612            unregister_netdev(dev);
613            cleanup_card(dev);
614            free_netdev(dev);
615        }
616    }
617}
618#endif /* MODULE */
619

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