Root/drivers/net/smc-mca.c

1/* smc-mca.c: A SMC Ultra ethernet driver for linux. */
2/*
3    Most of this driver, except for ultramca_probe is nearly
4    verbatim from smc-ultra.c by Donald Becker. The rest is
5    written and copyright 1996 by David Weis, weisd3458@uni.edu
6
7    This is a driver for the SMC Ultra and SMC EtherEZ ethercards.
8
9    This driver uses the cards in the 8390-compatible, shared memory mode.
10    Most of the run-time complexity is handled by the generic code in
11    8390.c.
12
13    This driver enables the shared memory only when doing the actual data
14    transfers to avoid a bug in early version of the card that corrupted
15    data transferred by a AHA1542.
16
17    This driver does not support the programmed-I/O data transfer mode of
18    the EtherEZ. That support (if available) is smc-ez.c. Nor does it
19    use the non-8390-compatible "Altego" mode. (No support currently planned.)
20
21    Changelog:
22
23    Paul Gortmaker : multiple card support for module users.
24    David Weis : Micro Channel-ized it.
25    Tom Sightler : Added support for IBM PS/2 Ethernet Adapter/A
26    Christopher Turcksin : Changed MCA-probe so that multiple adapters are
27               found correctly (Jul 16, 1997)
28    Chris Beauregard : Tried to merge the two changes above (Dec 15, 1997)
29    Tom Sightler : Fixed minor detection bug caused by above merge
30    Tom Sightler : Added support for three more Western Digital
31               MCA-adapters
32    Tom Sightler : Added support for 2.2.x mca_find_unused_adapter
33    Hartmut Schmidt : - Modified parameter detection to handle each
34                 card differently depending on a switch-list
35               - 'card_ver' removed from the adapter list
36               - Some minor bug fixes
37*/
38
39#include <linux/mca.h>
40#include <linux/module.h>
41#include <linux/kernel.h>
42#include <linux/errno.h>
43#include <linux/string.h>
44#include <linux/init.h>
45#include <linux/netdevice.h>
46#include <linux/etherdevice.h>
47
48#include <asm/io.h>
49#include <asm/system.h>
50
51#include "8390.h"
52
53#define DRV_NAME "smc-mca"
54
55static int ultramca_open(struct net_device *dev);
56static void ultramca_reset_8390(struct net_device *dev);
57static void ultramca_get_8390_hdr(struct net_device *dev,
58                                  struct e8390_pkt_hdr *hdr,
59                                  int ring_page);
60static void ultramca_block_input(struct net_device *dev, int count,
61                                 struct sk_buff *skb,
62                                 int ring_offset);
63static void ultramca_block_output(struct net_device *dev, int count,
64                                  const unsigned char *buf,
65                                  const int start_page);
66static int ultramca_close_card(struct net_device *dev);
67
68#define START_PG 0x00 /* First page of TX buffer */
69
70#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
71#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
72#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
73#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
74#define ULTRA_IO_EXTENT 32
75#define EN0_ERWCNT 0x08 /* Early receive warning count. */
76
77#define _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A 0
78#define _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A 1
79#define _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A 2
80#define _6fc1_WD_Starcard_PLUS_A_WD8003ST_A 3
81#define _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A 4
82#define _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A 5
83#define _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A 6
84#define _efe5_IBM_PS2_Adapter_A_for_Ethernet 7
85
86struct smc_mca_adapters_t {
87    unsigned int id;
88    char *name;
89};
90
91#define MAX_ULTRAMCA_CARDS 4 /* Max number of Ultra cards per module */
92
93static int ultra_io[MAX_ULTRAMCA_CARDS];
94static int ultra_irq[MAX_ULTRAMCA_CARDS];
95MODULE_LICENSE("GPL");
96
97module_param_array(ultra_io, int, NULL, 0);
98module_param_array(ultra_irq, int, NULL, 0);
99MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
100MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");
101
102static const struct {
103  unsigned int base_addr;
104} addr_table[] = {
105    { 0x0800 },
106    { 0x1800 },
107    { 0x2800 },
108    { 0x3800 },
109    { 0x4800 },
110    { 0x5800 },
111    { 0x6800 },
112    { 0x7800 },
113    { 0x8800 },
114    { 0x9800 },
115    { 0xa800 },
116    { 0xb800 },
117    { 0xc800 },
118    { 0xd800 },
119    { 0xe800 },
120    { 0xf800 }
121};
122
123#define MEM_MASK 64
124
125static const struct {
126  unsigned char mem_index;
127  unsigned long mem_start;
128  unsigned char num_pages;
129} mem_table[] = {
130    { 16, 0x0c0000, 40 },
131    { 18, 0x0c4000, 40 },
132    { 20, 0x0c8000, 40 },
133    { 22, 0x0cc000, 40 },
134    { 24, 0x0d0000, 40 },
135    { 26, 0x0d4000, 40 },
136    { 28, 0x0d8000, 40 },
137    { 30, 0x0dc000, 40 },
138    {144, 0xfc0000, 40 },
139    {148, 0xfc8000, 40 },
140    {154, 0xfd0000, 40 },
141    {156, 0xfd8000, 40 },
142    { 0, 0x0c0000, 20 },
143    { 1, 0x0c2000, 20 },
144    { 2, 0x0c4000, 20 },
145    { 3, 0x0c6000, 20 }
146};
147
148#define IRQ_MASK 243
149static const struct {
150   unsigned char new_irq;
151   unsigned char old_irq;
152} irq_table[] = {
153   { 3, 3 },
154   { 4, 4 },
155   { 10, 10 },
156   { 14, 15 }
157};
158
159static short smc_mca_adapter_ids[] __initdata = {
160    0x61c8,
161    0x61c9,
162    0x6fc0,
163    0x6fc1,
164    0x6fc2,
165    0xefd4,
166    0xefd5,
167    0xefe5,
168    0x0000
169};
170
171static char *smc_mca_adapter_names[] __initdata = {
172    "SMC Ethercard PLUS Elite/A BNC/AUI (WD8013EP/A)",
173    "SMC Ethercard PLUS Elite/A UTP/AUI (WD8013WP/A)",
174    "WD Ethercard PLUS/A (WD8003E/A or WD8003ET/A)",
175    "WD Starcard PLUS/A (WD8003ST/A)",
176    "WD Ethercard PLUS 10T/A (WD8003W/A)",
177    "IBM PS/2 Adapter/A for Ethernet UTP/AUI (WD8013WP/A)",
178    "IBM PS/2 Adapter/A for Ethernet BNC/AUI (WD8013EP/A)",
179    "IBM PS/2 Adapter/A for Ethernet",
180    NULL
181};
182
183static int ultra_found = 0;
184
185
186static const struct net_device_ops ultramca_netdev_ops = {
187    .ndo_open = ultramca_open,
188    .ndo_stop = ultramca_close_card,
189
190    .ndo_start_xmit = ei_start_xmit,
191    .ndo_tx_timeout = ei_tx_timeout,
192    .ndo_get_stats = ei_get_stats,
193    .ndo_set_multicast_list = ei_set_multicast_list,
194    .ndo_validate_addr = eth_validate_addr,
195    .ndo_set_mac_address = eth_mac_addr,
196    .ndo_change_mtu = eth_change_mtu,
197#ifdef CONFIG_NET_POLL_CONTROLLER
198    .ndo_poll_controller = ei_poll,
199#endif
200};
201
202static int __init ultramca_probe(struct device *gen_dev)
203{
204    unsigned short ioaddr;
205    struct net_device *dev;
206    unsigned char reg4, num_pages;
207    struct mca_device *mca_dev = to_mca_device(gen_dev);
208    char slot = mca_dev->slot;
209    unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
210    int i, rc;
211    int adapter = mca_dev->index;
212    int tbase = 0;
213    int tirq = 0;
214    int base_addr = ultra_io[ultra_found];
215    int irq = ultra_irq[ultra_found];
216
217    if (base_addr || irq) {
218        printk(KERN_INFO "Probing for SMC MCA adapter");
219        if (base_addr) {
220            printk(KERN_INFO " at I/O address 0x%04x%c",
221                   base_addr, irq ? ' ' : '\n');
222        }
223        if (irq) {
224            printk(KERN_INFO "using irq %d\n", irq);
225        }
226    }
227
228    tirq = 0;
229    tbase = 0;
230
231    /* If we're trying to match a specificied irq or io address,
232     * we'll reject the adapter found unless it's the one we're
233     * looking for */
234
235    pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
236    pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
237    pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
238    pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */
239
240    /* Test the following conditions:
241     * - If an irq parameter is supplied, compare it
242     * with the irq of the adapter we found
243     * - If a base_addr paramater is given, compare it
244     * with the base_addr of the adapter we found
245     * - Check that the irq and the base_addr of the
246     * adapter we found is not already in use by
247     * this driver
248     */
249
250    switch (mca_dev->index) {
251    case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
252    case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
253    case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
254    case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
255        {
256            tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
257            tirq = irq_table[(pos5 & 0xc) >> 2].new_irq;
258            break;
259        }
260    case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
261    case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
262    case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
263    case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
264        {
265            tbase = ((pos2 & 0x0fe) * 0x10);
266            tirq = irq_table[(pos5 & 3)].old_irq;
267            break;
268        }
269    }
270
271    if(!tirq || !tbase
272       || (irq && irq != tirq)
273       || (base_addr && tbase != base_addr))
274        /* FIXME: we're trying to force the ordering of the
275         * devices here, there should be a way of getting this
276         * to happen */
277        return -ENXIO;
278
279        /* Adapter found. */
280    dev = alloc_ei_netdev();
281    if(!dev)
282        return -ENODEV;
283
284    SET_NETDEV_DEV(dev, gen_dev);
285    mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
286    mca_device_set_claim(mca_dev, 1);
287
288    printk(KERN_INFO "smc_mca: %s found in slot %d\n",
289               smc_mca_adapter_names[adapter], slot + 1);
290
291    ultra_found++;
292
293    dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
294    dev->irq = mca_device_transform_irq(mca_dev, tirq);
295    dev->mem_start = 0;
296    num_pages = 40;
297
298    switch (adapter) { /* card-# in const array above [hs] */
299        case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
300        case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
301        {
302            for (i = 0; i < 16; i++) { /* taking 16 counts
303                            * up to 15 [hs] */
304                if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) {
305                    dev->mem_start = (unsigned long)
306                      mca_device_transform_memory(mca_dev, (void *)mem_table[i].mem_start);
307                    num_pages = mem_table[i].num_pages;
308                }
309            }
310            break;
311        }
312        case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
313        case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
314        case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
315        case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
316        {
317            dev->mem_start = (unsigned long)
318              mca_device_transform_memory(mca_dev, (void *)((pos3 & 0xfc) * 0x1000));
319            num_pages = 0x40;
320            break;
321        }
322        case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
323        case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
324        {
325            /* courtesy of gamera@quartz.ocn.ne.jp, pos3 indicates
326             * the index of the 0x2000 step.
327             * beware different number of pages [hs]
328             */
329            dev->mem_start = (unsigned long)
330              mca_device_transform_memory(mca_dev, (void *)(0xc0000 + (0x2000 * (pos3 & 0xf))));
331            num_pages = 0x20 + (2 * (pos3 & 0x10));
332            break;
333        }
334    }
335
336    /* sanity check, shouldn't happen */
337    if (dev->mem_start == 0) {
338        rc = -ENODEV;
339        goto err_unclaim;
340    }
341
342    if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) {
343        rc = -ENODEV;
344        goto err_unclaim;
345    }
346
347    reg4 = inb(ioaddr + 4) & 0x7f;
348    outb(reg4, ioaddr + 4);
349
350    for (i = 0; i < 6; i++)
351        dev->dev_addr[i] = inb(ioaddr + 8 + i);
352
353    printk(KERN_INFO "smc_mca[%d]: Parameters: %#3x, %pM",
354           slot + 1, ioaddr, dev->dev_addr);
355
356    /* Switch from the station address to the alternate register set
357     * and read the useful registers there.
358     */
359
360    outb(0x80 | reg4, ioaddr + 4);
361
362    /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot.
363     */
364
365    outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
366
367    /* Switch back to the station address register set so that
368     * the MS-DOS driver can find the card after a warm boot.
369     */
370
371    outb(reg4, ioaddr + 4);
372
373    dev_set_drvdata(gen_dev, dev);
374
375    /* The 8390 isn't at the base address, so fake the offset
376     */
377
378    dev->base_addr = ioaddr + ULTRA_NIC_OFFSET;
379
380    ei_status.name = "SMC Ultra MCA";
381    ei_status.word16 = 1;
382    ei_status.tx_start_page = START_PG;
383    ei_status.rx_start_page = START_PG + TX_PAGES;
384    ei_status.stop_page = num_pages;
385
386    ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG) * 256);
387    if (!ei_status.mem) {
388        rc = -ENOMEM;
389        goto err_release_region;
390    }
391
392    dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG) * 256;
393
394    printk(", IRQ %d memory %#lx-%#lx.\n",
395    dev->irq, dev->mem_start, dev->mem_end - 1);
396
397    ei_status.reset_8390 = &ultramca_reset_8390;
398    ei_status.block_input = &ultramca_block_input;
399    ei_status.block_output = &ultramca_block_output;
400    ei_status.get_8390_hdr = &ultramca_get_8390_hdr;
401
402    ei_status.priv = slot;
403
404    dev->netdev_ops = &ultramca_netdev_ops;
405
406    NS8390_init(dev, 0);
407
408    rc = register_netdev(dev);
409    if (rc)
410        goto err_unmap;
411
412    return 0;
413
414err_unmap:
415    iounmap(ei_status.mem);
416err_release_region:
417    release_region(ioaddr, ULTRA_IO_EXTENT);
418err_unclaim:
419    mca_device_set_claim(mca_dev, 0);
420    free_netdev(dev);
421    return rc;
422}
423
424static int ultramca_open(struct net_device *dev)
425{
426    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
427    int retval;
428
429    if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
430        return retval;
431
432    outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
433    outb(0x80, ioaddr + 5); /* ??? */
434    outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
435    outb(0x04, ioaddr + 5); /* ??? */
436
437    /* Set the early receive warning level in window 0 high enough not
438     * to receive ERW interrupts.
439     */
440
441    /* outb_p(E8390_NODMA + E8390_PAGE0, dev->base_addr);
442     * outb(0xff, dev->base_addr + EN0_ERWCNT);
443     */
444
445    ei_open(dev);
446    return 0;
447}
448
449static void ultramca_reset_8390(struct net_device *dev)
450{
451    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
452
453    outb(ULTRA_RESET, ioaddr);
454    if (ei_debug > 1)
455        printk("resetting Ultra, t=%ld...", jiffies);
456    ei_status.txing = 0;
457
458    outb(0x80, ioaddr + 5); /* ??? */
459    outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
460
461    if (ei_debug > 1)
462        printk("reset done\n");
463    return;
464}
465
466/* Grab the 8390 specific header. Similar to the block_input routine, but
467 * we don't need to be concerned with ring wrap as the header will be at
468 * the start of a page, so we optimize accordingly.
469 */
470
471static void ultramca_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
472{
473    void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG) << 8);
474
475#ifdef notdef
476    /* Officially this is what we are doing, but the readl() is faster */
477    memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
478#else
479    ((unsigned int*)hdr)[0] = readl(hdr_start);
480#endif
481}
482
483/* Block input and output are easy on shared memory ethercards, the only
484 * complication is when the ring buffer wraps.
485 */
486
487static void ultramca_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
488{
489    void __iomem *xfer_start = ei_status.mem + ring_offset - START_PG * 256;
490
491    if (ring_offset + count > ei_status.stop_page * 256) {
492        /* We must wrap the input move. */
493        int semi_count = ei_status.stop_page * 256 - ring_offset;
494        memcpy_fromio(skb->data, xfer_start, semi_count);
495        count -= semi_count;
496        memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
497    } else {
498        memcpy_fromio(skb->data, xfer_start, count);
499    }
500
501}
502
503static void ultramca_block_output(struct net_device *dev, int count, const unsigned char *buf,
504                int start_page)
505{
506    void __iomem *shmem = ei_status.mem + ((start_page - START_PG) << 8);
507
508    memcpy_toio(shmem, buf, count);
509}
510
511static int ultramca_close_card(struct net_device *dev)
512{
513    int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
514
515    netif_stop_queue(dev);
516
517    if (ei_debug > 1)
518        printk("%s: Shutting down ethercard.\n", dev->name);
519
520    outb(0x00, ioaddr + 6); /* Disable interrupts. */
521    free_irq(dev->irq, dev);
522
523    NS8390_init(dev, 0);
524    /* We should someday disable shared memory and change to 8-bit mode
525         * "just in case"...
526     */
527
528    return 0;
529}
530
531static int ultramca_remove(struct device *gen_dev)
532{
533    struct mca_device *mca_dev = to_mca_device(gen_dev);
534    struct net_device *dev = dev_get_drvdata(gen_dev);
535
536    if (dev) {
537        /* NB: ultra_close_card() does free_irq */
538        int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
539
540        unregister_netdev(dev);
541        mca_device_set_claim(mca_dev, 0);
542        release_region(ioaddr, ULTRA_IO_EXTENT);
543        iounmap(ei_status.mem);
544        free_netdev(dev);
545    }
546    return 0;
547}
548
549
550static struct mca_driver ultra_driver = {
551    .id_table = smc_mca_adapter_ids,
552    .driver = {
553        .name = "smc-mca",
554        .bus = &mca_bus_type,
555        .probe = ultramca_probe,
556        .remove = ultramca_remove,
557    }
558};
559
560static int __init ultramca_init_module(void)
561{
562    if(!MCA_bus)
563        return -ENXIO;
564
565    mca_register_driver(&ultra_driver);
566
567    return ultra_found ? 0 : -ENXIO;
568}
569
570static void __exit ultramca_cleanup_module(void)
571{
572    mca_unregister_driver(&ultra_driver);
573}
574module_init(ultramca_init_module);
575module_exit(ultramca_cleanup_module);
576
577

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