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
  55 static int ultramca_open(struct net_device *dev);
  56 static void ultramca_reset_8390(struct net_device *dev);
  57 static void ultramca_get_8390_hdr(struct net_device *dev,
  58                                   struct e8390_pkt_hdr *hdr,
  59                                   int ring_page);
  60 static void ultramca_block_input(struct net_device *dev, int count,
  61                                  struct sk_buff *skb,
  62                                  int ring_offset);
  63 static void ultramca_block_output(struct net_device *dev, int count,
  64                                   const unsigned char *buf,
  65                                   const int start_page);
  66 static 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
  86 struct 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
  93 static int ultra_io[MAX_ULTRAMCA_CARDS];
  94 static int ultra_irq[MAX_ULTRAMCA_CARDS];
  95 MODULE_LICENSE("GPL");
  96
  97 module_param_array(ultra_io, int, NULL, 0);
  98 module_param_array(ultra_irq, int, NULL, 0);
  99 MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
 100 MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");
 101
 102 static 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
 125 static 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
 149 static 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
 159 static 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
 171 static 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
 183 static int ultra_found = 0;
 184
 185
 186 static 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
 202 static 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
 414 err_unmap:
 415         iounmap(ei_status.mem);
 416 err_release_region:
 417         release_region(ioaddr, ULTRA_IO_EXTENT);
 418 err_unclaim:
 419         mca_device_set_claim(mca_dev, 0);
 420         free_netdev(dev);
 421         return rc;
 422 }
 423
 424 static 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
 449 static 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 }
 464
 465 /* Grab the 8390 specific header. Similar to the block_input routine, but
 466  * we don't need to be concerned with ring wrap as the header will be at
 467  * the start of a page, so we optimize accordingly.
 468  */
 469
 470 static void ultramca_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 471 {
 472         void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG) << 8);
 473
 474 #ifdef notdef
 475         /* Officially this is what we are doing, but the readl() is faster */
 476         memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
 477 #else
 478         ((unsigned int*)hdr)[0] = readl(hdr_start);
 479 #endif
 480 }
 481
 482 /* Block input and output are easy on shared memory ethercards, the only
 483  * complication is when the ring buffer wraps.
 484  */
 485
 486 static void ultramca_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 487 {
 488         void __iomem *xfer_start = ei_status.mem + ring_offset - START_PG * 256;
 489
 490         if (ring_offset + count > ei_status.stop_page * 256) {
 491                 /* We must wrap the input move. */
 492                 int semi_count = ei_status.stop_page * 256 - ring_offset;
 493                 memcpy_fromio(skb->data, xfer_start, semi_count);
 494                 count -= semi_count;
 495                 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
 496         } else {
 497                 memcpy_fromio(skb->data, xfer_start, count);
 498         }
 499
 500 }
 501
 502 static void ultramca_block_output(struct net_device *dev, int count, const unsigned char *buf,
 503                 int start_page)
 504 {
 505         void __iomem *shmem = ei_status.mem + ((start_page - START_PG) << 8);
 506
 507         memcpy_toio(shmem, buf, count);
 508 }
 509
 510 static int ultramca_close_card(struct net_device *dev)
 511 {
 512         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 513
 514         netif_stop_queue(dev);
 515
 516         if (ei_debug > 1)
 517                 printk("%s: Shutting down ethercard.\n", dev->name);
 518
 519         outb(0x00, ioaddr + 6);     /* Disable interrupts. */
 520         free_irq(dev->irq, dev);
 521
 522         NS8390_init(dev, 0);
 523         /* We should someday disable shared memory and change to 8-bit mode
 524          * "just in case"...
 525          */
 526
 527         return 0;
 528 }
 529
 530 static int ultramca_remove(struct device *gen_dev)
 531 {
 532         struct mca_device *mca_dev = to_mca_device(gen_dev);
 533         struct net_device *dev = dev_get_drvdata(gen_dev);
 534
 535         if (dev) {
 536                 /* NB: ultra_close_card() does free_irq */
 537                 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
 538
 539                 unregister_netdev(dev);
 540                 mca_device_set_claim(mca_dev, 0);
 541                 release_region(ioaddr, ULTRA_IO_EXTENT);
 542                 iounmap(ei_status.mem);
 543                 free_netdev(dev);
 544         }
 545         return 0;
 546 }
 547
 548
 549 static struct mca_driver ultra_driver = {
 550         .id_table = smc_mca_adapter_ids,
 551         .driver = {
 552                 .name = "smc-mca",
 553                 .bus = &mca_bus_type,
 554                 .probe = ultramca_probe,
 555                 .remove = ultramca_remove,
 556         }
 557 };
 558
 559 static int __init ultramca_init_module(void)
 560 {
 561         if(!MCA_bus)
 562                 return -ENXIO;
 563
 564         mca_register_driver(&ultra_driver);
 565
 566         return ultra_found ? 0 : -ENXIO;
 567 }
 568
 569 static void __exit ultramca_cleanup_module(void)
 570 {
 571         mca_unregister_driver(&ultra_driver);
 572 }
 573 module_init(ultramca_init_module);
 574 module_exit(ultramca_cleanup_module);
 575