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/interrupt.h>
  46 #include <linux/netdevice.h>
  47 #include <linux/etherdevice.h>
  48
  49 #include <asm/io.h>
  50 #include <asm/system.h>
  51
  52 #include "8390.h"
  53
  54 #define DRV_NAME "smc-mca"
  55
  56 static int ultramca_open(struct net_device *dev);
  57 static void ultramca_reset_8390(struct net_device *dev);
  58 static void ultramca_get_8390_hdr(struct net_device *dev,
  59                                   struct e8390_pkt_hdr *hdr,
  60                                   int ring_page);
  61 static void ultramca_block_input(struct net_device *dev, int count,
  62                                  struct sk_buff *skb,
  63                                  int ring_offset);
  64 static void ultramca_block_output(struct net_device *dev, int count,
  65                                   const unsigned char *buf,
  66                                   const int start_page);
  67 static int ultramca_close_card(struct net_device *dev);
  68
  69 #define START_PG        0x00    /* First page of TX buffer */
  70
  71 #define ULTRA_CMDREG 0      /* Offset to ASIC command register. */
  72 #define ULTRA_RESET  0x80   /* Board reset, in ULTRA_CMDREG. */
  73 #define ULTRA_MEMENB 0x40   /* Enable the shared memory. */
  74 #define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
  75 #define ULTRA_IO_EXTENT 32
  76 #define EN0_ERWCNT      0x08  /* Early receive warning count. */
  77
  78 #define _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A            0
  79 #define _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A            1
  80 #define _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A              2
  81 #define _6fc1_WD_Starcard_PLUS_A_WD8003ST_A                            3
  82 #define _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A                        4
  83 #define _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A        5
  84 #define _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A        6
  85 #define _efe5_IBM_PS2_Adapter_A_for_Ethernet                           7
  86
  87 struct smc_mca_adapters_t {
  88         unsigned int id;
  89         char *name;
  90 };
  91
  92 #define MAX_ULTRAMCA_CARDS 4    /* Max number of Ultra cards per module */
  93
  94 static int ultra_io[MAX_ULTRAMCA_CARDS];
  95 static int ultra_irq[MAX_ULTRAMCA_CARDS];
  96 MODULE_LICENSE("GPL");
  97
  98 module_param_array(ultra_io, int, NULL, 0);
  99 module_param_array(ultra_irq, int, NULL, 0);
 100 MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
 101 MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");
 102
 103 static const struct {
 104   unsigned int base_addr;
 105 } addr_table[] = {
 106     { 0x0800 },
 107     { 0x1800 },
 108     { 0x2800 },
 109     { 0x3800 },
 110     { 0x4800 },
 111     { 0x5800 },
 112     { 0x6800 },
 113     { 0x7800 },
 114     { 0x8800 },
 115     { 0x9800 },
 116     { 0xa800 },
 117     { 0xb800 },
 118     { 0xc800 },
 119     { 0xd800 },
 120     { 0xe800 },
 121     { 0xf800 }
 122 };
 123
 124 #define MEM_MASK 64
 125
 126 static const struct {
 127   unsigned char mem_index;
 128   unsigned long mem_start;
 129   unsigned char num_pages;
 130 } mem_table[] = {
 131     { 16, 0x0c0000, 40 },
 132     { 18, 0x0c4000, 40 },
 133     { 20, 0x0c8000, 40 },
 134     { 22, 0x0cc000, 40 },
 135     { 24, 0x0d0000, 40 },
 136     { 26, 0x0d4000, 40 },
 137     { 28, 0x0d8000, 40 },
 138     { 30, 0x0dc000, 40 },
 139     {144, 0xfc0000, 40 },
 140     {148, 0xfc8000, 40 },
 141     {154, 0xfd0000, 40 },
 142     {156, 0xfd8000, 40 },
 143     {  0, 0x0c0000, 20 },
 144     {  1, 0x0c2000, 20 },
 145     {  2, 0x0c4000, 20 },
 146     {  3, 0x0c6000, 20 }
 147 };
 148
 149 #define IRQ_MASK 243
 150 static const struct {
 151    unsigned char new_irq;
 152    unsigned char old_irq;
 153 } irq_table[] = {
 154    {  3,  3 },
 155    {  4,  4 },
 156    { 10, 10 },
 157    { 14, 15 }
 158 };
 159
 160 static short smc_mca_adapter_ids[] __initdata = {
 161         0x61c8,
 162         0x61c9,
 163         0x6fc0,
 164         0x6fc1,
 165         0x6fc2,
 166         0xefd4,
 167         0xefd5,
 168         0xefe5,
 169         0x0000
 170 };
 171
 172 static char *smc_mca_adapter_names[] __initdata = {
 173         "SMC Ethercard PLUS Elite/A BNC/AUI (WD8013EP/A)",
 174         "SMC Ethercard PLUS Elite/A UTP/AUI (WD8013WP/A)",
 175         "WD Ethercard PLUS/A (WD8003E/A or WD8003ET/A)",
 176         "WD Starcard PLUS/A (WD8003ST/A)",
 177         "WD Ethercard PLUS 10T/A (WD8003W/A)",
 178         "IBM PS/2 Adapter/A for Ethernet UTP/AUI (WD8013WP/A)",
 179         "IBM PS/2 Adapter/A for Ethernet BNC/AUI (WD8013EP/A)",
 180         "IBM PS/2 Adapter/A for Ethernet",
 181         NULL
 182 };
 183
 184 static int ultra_found = 0;
 185
 186
 187 static const struct net_device_ops ultramca_netdev_ops = {
 188         .ndo_open               = ultramca_open,
 189         .ndo_stop               = ultramca_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    = ei_poll,
 200 #endif
 201 };
 202
 203 static int __init ultramca_probe(struct device *gen_dev)
 204 {
 205         unsigned short ioaddr;
 206         struct net_device *dev;
 207         unsigned char reg4, num_pages;
 208         struct mca_device *mca_dev = to_mca_device(gen_dev);
 209         char slot = mca_dev->slot;
 210         unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
 211         int i, rc;
 212         int adapter = mca_dev->index;
 213         int tbase = 0;
 214         int tirq = 0;
 215         int base_addr = ultra_io[ultra_found];
 216         int irq = ultra_irq[ultra_found];
 217
 218         if (base_addr || irq) {
 219                 printk(KERN_INFO "Probing for SMC MCA adapter");
 220                 if (base_addr) {
 221                         printk(KERN_INFO " at I/O address 0x%04x%c",
 222                                base_addr, irq ? ' ' : '\n');
 223                 }
 224                 if (irq) {
 225                         printk(KERN_INFO "using irq %d\n", irq);
 226                 }
 227         }
 228
 229         tirq = 0;
 230         tbase = 0;
 231
 232         /* If we're trying to match a specificied irq or io address,
 233          * we'll reject the adapter found unless it's the one we're
 234          * looking for */
 235
 236         pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
 237         pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
 238         pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
 239         pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */
 240
 241         /* Test the following conditions:
 242          * - If an irq parameter is supplied, compare it
 243          *   with the irq of the adapter we found
 244          * - If a base_addr paramater is given, compare it
 245          *   with the base_addr of the adapter we found
 246          * - Check that the irq and the base_addr of the
 247          *   adapter we found is not already in use by
 248          *   this driver
 249          */
 250
 251         switch (mca_dev->index) {
 252         case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
 253         case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
 254         case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
 255         case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
 256                 {
 257                         tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
 258                         tirq  = irq_table[(pos5 & 0xc) >> 2].new_irq;
 259                         break;
 260                 }
 261         case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
 262         case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
 263         case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
 264         case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
 265                 {
 266                         tbase = ((pos2 & 0x0fe) * 0x10);
 267                         tirq  = irq_table[(pos5 & 3)].old_irq;
 268                         break;
 269                 }
 270         }
 271
 272         if(!tirq || !tbase ||
 273            (irq && irq != tirq) ||
 274            (base_addr && tbase != base_addr))
 275                 /* FIXME: we're trying to force the ordering of the
 276                  * devices here, there should be a way of getting this
 277                  * to happen */
 278                 return -ENXIO;
 279
 280         /* Adapter found. */
 281         dev  = alloc_ei_netdev();
 282         if(!dev)
 283                 return -ENODEV;
 284
 285         SET_NETDEV_DEV(dev, gen_dev);
 286         mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
 287         mca_device_set_claim(mca_dev, 1);
 288
 289         printk(KERN_INFO "smc_mca: %s found in slot %d\n",
 290                        smc_mca_adapter_names[adapter], slot + 1);
 291
 292         ultra_found++;
 293
 294         dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
 295         dev->irq       = mca_device_transform_irq(mca_dev, tirq);
 296         dev->mem_start = 0;
 297         num_pages      = 40;
 298
 299         switch (adapter) {      /* card-# in const array above [hs] */
 300                 case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
 301                 case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
 302                 {
 303                         for (i = 0; i < 16; i++) { /* taking 16 counts
 304                                                     * up to 15 [hs] */
 305                                 if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) {
 306                                         dev->mem_start = (unsigned long)
 307                                           mca_device_transform_memory(mca_dev, (void *)mem_table[i].mem_start);
 308                                         num_pages = mem_table[i].num_pages;
 309                                 }
 310                         }
 311                         break;
 312                 }
 313                 case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
 314                 case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
 315                 case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
 316                 case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
 317                 {
 318                         dev->mem_start = (unsigned long)
 319                           mca_device_transform_memory(mca_dev, (void *)((pos3 & 0xfc) * 0x1000));
 320                         num_pages = 0x40;
 321                         break;
 322                 }
 323                 case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
 324                 case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
 325                 {
 326                         /* courtesy of gamera@quartz.ocn.ne.jp, pos3 indicates
 327                          * the index of the 0x2000 step.
 328                          * beware different number of pages [hs]
 329                          */
 330                         dev->mem_start = (unsigned long)
 331                           mca_device_transform_memory(mca_dev, (void *)(0xc0000 + (0x2000 * (pos3 & 0xf))));
 332                         num_pages = 0x20 + (2 * (pos3 & 0x10));
 333                         break;
 334                 }
 335         }
 336
 337         /* sanity check, shouldn't happen */
 338         if (dev->mem_start == 0) {
 339                 rc = -ENODEV;
 340                 goto err_unclaim;
 341         }
 342
 343         if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) {
 344                 rc = -ENODEV;
 345                 goto err_unclaim;
 346         }
 347
 348         reg4 = inb(ioaddr + 4) & 0x7f;
 349         outb(reg4, ioaddr + 4);
 350
 351         for (i = 0; i < 6; i++)
 352                 dev->dev_addr[i] = inb(ioaddr + 8 + i);
 353
 354         printk(KERN_INFO "smc_mca[%d]: Parameters: %#3x, %pM",
 355                slot + 1, ioaddr, dev->dev_addr);
 356
 357         /* Switch from the station address to the alternate register set
 358          * and read the useful registers there.
 359          */
 360
 361         outb(0x80 | reg4, ioaddr + 4);
 362
 363         /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot.
 364          */
 365
 366         outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
 367
 368         /* Switch back to the station address register set so that
 369          * the MS-DOS driver can find the card after a warm boot.
 370          */
 371
 372         outb(reg4, ioaddr + 4);
 373
 374         dev_set_drvdata(gen_dev, dev);
 375
 376         /* The 8390 isn't at the base address, so fake the offset
 377          */
 378
 379         dev->base_addr = ioaddr + ULTRA_NIC_OFFSET;
 380
 381         ei_status.name = "SMC Ultra MCA";
 382         ei_status.word16 = 1;
 383         ei_status.tx_start_page = START_PG;
 384         ei_status.rx_start_page = START_PG + TX_PAGES;
 385         ei_status.stop_page = num_pages;
 386
 387         ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG) * 256);
 388         if (!ei_status.mem) {
 389                 rc = -ENOMEM;
 390                 goto err_release_region;
 391         }
 392
 393         dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG) * 256;
 394
 395         printk(", IRQ %d memory %#lx-%#lx.\n",
 396         dev->irq, dev->mem_start, dev->mem_end - 1);
 397
 398         ei_status.reset_8390 = &ultramca_reset_8390;
 399         ei_status.block_input = &ultramca_block_input;
 400         ei_status.block_output = &ultramca_block_output;
 401         ei_status.get_8390_hdr = &ultramca_get_8390_hdr;
 402
 403         ei_status.priv = slot;
 404
 405         dev->netdev_ops = &ultramca_netdev_ops;
 406
 407         NS8390_init(dev, 0);
 408
 409         rc = register_netdev(dev);
 410         if (rc)
 411                 goto err_unmap;
 412
 413         return 0;
 414
 415 err_unmap:
 416         iounmap(ei_status.mem);
 417 err_release_region:
 418         release_region(ioaddr, ULTRA_IO_EXTENT);
 419 err_unclaim:
 420         mca_device_set_claim(mca_dev, 0);
 421         free_netdev(dev);
 422         return rc;
 423 }
 424
 425 static int ultramca_open(struct net_device *dev)
 426 {
 427         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 428         int retval;
 429
 430         if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
 431                 return retval;
 432
 433         outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
 434         outb(0x80, ioaddr + 5);     /* ??? */
 435         outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
 436         outb(0x04, ioaddr + 5);     /* ??? */
 437
 438         /* Set the early receive warning level in window 0 high enough not
 439          * to receive ERW interrupts.
 440          */
 441
 442         /* outb_p(E8390_NODMA + E8390_PAGE0, dev->base_addr);
 443          * outb(0xff, dev->base_addr + EN0_ERWCNT);
 444          */
 445
 446         ei_open(dev);
 447         return 0;
 448 }
 449
 450 static void ultramca_reset_8390(struct net_device *dev)
 451 {
 452         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 453
 454         outb(ULTRA_RESET, ioaddr);
 455         if (ei_debug > 1)
 456                 printk("resetting Ultra, t=%ld...", jiffies);
 457         ei_status.txing = 0;
 458
 459         outb(0x80, ioaddr + 5);     /* ??? */
 460         outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
 461
 462         if (ei_debug > 1)
 463                 printk("reset done\n");
 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
 471 static 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
 487 static 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
 503 static 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
 511 static 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
 531 static 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
 550 static 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
 560 static 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
 570 static void __exit ultramca_cleanup_module(void)
 571 {
 572         mca_unregister_driver(&ultra_driver);
 573 }
 574 module_init(ultramca_init_module);
 575 module_exit(ultramca_cleanup_module);
 576