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 static int __init ultramca_probe(struct device *gen_dev)
 186 {
 187         unsigned short ioaddr;
 188         struct net_device *dev;
 189         unsigned char reg4, num_pages;
 190         struct mca_device *mca_dev = to_mca_device(gen_dev);
 191         char slot = mca_dev->slot;
 192         unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
 193         int i, rc;
 194         int adapter = mca_dev->index;
 195         int tbase = 0;
 196         int tirq = 0;
 197         int base_addr = ultra_io[ultra_found];
 198         int irq = ultra_irq[ultra_found];
 199         DECLARE_MAC_BUF(mac);
 200
 201         if (base_addr || irq) {
 202                 printk(KERN_INFO "Probing for SMC MCA adapter");
 203                 if (base_addr) {
 204                         printk(KERN_INFO " at I/O address 0x%04x%c",
 205                                base_addr, irq ? ' ' : '\n');
 206                 }
 207                 if (irq) {
 208                         printk(KERN_INFO "using irq %d\n", irq);
 209                 }
 210         }
 211
 212         tirq = 0;
 213         tbase = 0;
 214
 215         /* If we're trying to match a specificied irq or io address,
 216          * we'll reject the adapter found unless it's the one we're
 217          * looking for */
 218
 219         pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
 220         pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
 221         pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
 222         pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */
 223
 224         /* Test the following conditions:
 225          * - If an irq parameter is supplied, compare it
 226          *   with the irq of the adapter we found
 227          * - If a base_addr paramater is given, compare it
 228          *   with the base_addr of the adapter we found
 229          * - Check that the irq and the base_addr of the
 230          *   adapter we found is not already in use by
 231          *   this driver
 232          */
 233
 234         switch (mca_dev->index) {
 235         case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
 236         case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
 237         case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
 238         case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
 239                 {
 240                         tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
 241                         tirq  = irq_table[(pos5 & 0xc) >> 2].new_irq;
 242                         break;
 243                 }
 244         case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
 245         case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
 246         case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
 247         case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
 248                 {
 249                         tbase = ((pos2 & 0x0fe) * 0x10);
 250                         tirq  = irq_table[(pos5 & 3)].old_irq;
 251                         break;
 252                 }
 253         }
 254
 255         if(!tirq || !tbase
 256            || (irq && irq != tirq)
 257            || (base_addr && tbase != base_addr))
 258                 /* FIXME: we're trying to force the ordering of the
 259                  * devices here, there should be a way of getting this
 260                  * to happen */
 261                 return -ENXIO;
 262
 263         /* Adapter found. */
 264         dev  = alloc_ei_netdev();
 265         if(!dev)
 266                 return -ENODEV;
 267
 268         SET_NETDEV_DEV(dev, gen_dev);
 269         mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
 270         mca_device_set_claim(mca_dev, 1);
 271
 272         printk(KERN_INFO "smc_mca: %s found in slot %d\n",
 273                        smc_mca_adapter_names[adapter], slot + 1);
 274
 275         ultra_found++;
 276
 277         dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
 278         dev->irq       = mca_device_transform_irq(mca_dev, tirq);
 279         dev->mem_start = 0;
 280         num_pages      = 40;
 281
 282         switch (adapter) {      /* card-# in const array above [hs] */
 283                 case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
 284                 case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
 285                 {
 286                         for (i = 0; i < 16; i++) { /* taking 16 counts
 287                                                     * up to 15 [hs] */
 288                                 if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) {
 289                                         dev->mem_start = (unsigned long)
 290                                           mca_device_transform_memory(mca_dev, (void *)mem_table[i].mem_start);
 291                                         num_pages = mem_table[i].num_pages;
 292                                 }
 293                         }
 294                         break;
 295                 }
 296                 case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
 297                 case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
 298                 case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
 299                 case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
 300                 {
 301                         dev->mem_start = (unsigned long)
 302                           mca_device_transform_memory(mca_dev, (void *)((pos3 & 0xfc) * 0x1000));
 303                         num_pages = 0x40;
 304                         break;
 305                 }
 306                 case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
 307                 case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
 308                 {
 309                         /* courtesy of gamera@quartz.ocn.ne.jp, pos3 indicates
 310                          * the index of the 0x2000 step.
 311                          * beware different number of pages [hs]
 312                          */
 313                         dev->mem_start = (unsigned long)
 314                           mca_device_transform_memory(mca_dev, (void *)(0xc0000 + (0x2000 * (pos3 & 0xf))));
 315                         num_pages = 0x20 + (2 * (pos3 & 0x10));
 316                         break;
 317                 }
 318         }
 319
 320         /* sanity check, shouldn't happen */
 321         if (dev->mem_start == 0) {
 322                 rc = -ENODEV;
 323                 goto err_unclaim;
 324         }
 325
 326         if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) {
 327                 rc = -ENODEV;
 328                 goto err_unclaim;
 329         }
 330
 331         reg4 = inb(ioaddr + 4) & 0x7f;
 332         outb(reg4, ioaddr + 4);
 333
 334         for (i = 0; i < 6; i++)
 335                 dev->dev_addr[i] = inb(ioaddr + 8 + i);
 336
 337         printk(KERN_INFO "smc_mca[%d]: Parameters: %#3x, %s",
 338                slot + 1, ioaddr, print_mac(mac, dev->dev_addr));
 339
 340         /* Switch from the station address to the alternate register set
 341          * and read the useful registers there.
 342          */
 343
 344         outb(0x80 | reg4, ioaddr + 4);
 345
 346         /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot.
 347          */
 348
 349         outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
 350
 351         /* Switch back to the station address register set so that
 352          * the MS-DOS driver can find the card after a warm boot.
 353          */
 354
 355         outb(reg4, ioaddr + 4);
 356
 357         gen_dev->driver_data = dev;
 358
 359         /* The 8390 isn't at the base address, so fake the offset
 360          */
 361
 362         dev->base_addr = ioaddr + ULTRA_NIC_OFFSET;
 363
 364         ei_status.name = "SMC Ultra MCA";
 365         ei_status.word16 = 1;
 366         ei_status.tx_start_page = START_PG;
 367         ei_status.rx_start_page = START_PG + TX_PAGES;
 368         ei_status.stop_page = num_pages;
 369
 370         ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG) * 256);
 371         if (!ei_status.mem) {
 372                 rc = -ENOMEM;
 373                 goto err_release_region;
 374         }
 375
 376         dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG) * 256;
 377
 378         printk(", IRQ %d memory %#lx-%#lx.\n",
 379         dev->irq, dev->mem_start, dev->mem_end - 1);
 380
 381         ei_status.reset_8390 = &ultramca_reset_8390;
 382         ei_status.block_input = &ultramca_block_input;
 383         ei_status.block_output = &ultramca_block_output;
 384         ei_status.get_8390_hdr = &ultramca_get_8390_hdr;
 385
 386         ei_status.priv = slot;
 387
 388         dev->open = &ultramca_open;
 389         dev->stop = &ultramca_close_card;
 390 #ifdef CONFIG_NET_POLL_CONTROLLER
 391         dev->poll_controller = ei_poll;
 392 #endif
 393
 394         NS8390_init(dev, 0);
 395
 396         rc = register_netdev(dev);
 397         if (rc)
 398                 goto err_unmap;
 399
 400         return 0;
 401
 402 err_unmap:
 403         iounmap(ei_status.mem);
 404 err_release_region:
 405         release_region(ioaddr, ULTRA_IO_EXTENT);
 406 err_unclaim:
 407         mca_device_set_claim(mca_dev, 0);
 408         free_netdev(dev);
 409         return rc;
 410 }
 411
 412 static int ultramca_open(struct net_device *dev)
 413 {
 414         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 415         int retval;
 416
 417         if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
 418                 return retval;
 419
 420         outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
 421         outb(0x80, ioaddr + 5);     /* ??? */
 422         outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
 423         outb(0x04, ioaddr + 5);     /* ??? */
 424
 425         /* Set the early receive warning level in window 0 high enough not
 426          * to receive ERW interrupts.
 427          */
 428
 429         /* outb_p(E8390_NODMA + E8390_PAGE0, dev->base_addr);
 430          * outb(0xff, dev->base_addr + EN0_ERWCNT);
 431          */
 432
 433         ei_open(dev);
 434         return 0;
 435 }
 436
 437 static void ultramca_reset_8390(struct net_device *dev)
 438 {
 439         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 440
 441         outb(ULTRA_RESET, ioaddr);
 442         if (ei_debug > 1)
 443                 printk("resetting Ultra, t=%ld...", jiffies);
 444         ei_status.txing = 0;
 445
 446         outb(0x80, ioaddr + 5);     /* ??? */
 447         outb(0x01, ioaddr + 6);     /* Enable interrupts and memory. */
 448
 449         if (ei_debug > 1)
 450                 printk("reset done\n");
 451         return;
 452 }
 453
 454 /* Grab the 8390 specific header. Similar to the block_input routine, but
 455  * we don't need to be concerned with ring wrap as the header will be at
 456  * the start of a page, so we optimize accordingly.
 457  */
 458
 459 static void ultramca_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
 460 {
 461         void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG) << 8);
 462
 463 #ifdef notdef
 464         /* Officially this is what we are doing, but the readl() is faster */
 465         memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
 466 #else
 467         ((unsigned int*)hdr)[0] = readl(hdr_start);
 468 #endif
 469 }
 470
 471 /* Block input and output are easy on shared memory ethercards, the only
 472  * complication is when the ring buffer wraps.
 473  */
 474
 475 static void ultramca_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
 476 {
 477         void __iomem *xfer_start = ei_status.mem + ring_offset - START_PG * 256;
 478
 479         if (ring_offset + count > ei_status.stop_page * 256) {
 480                 /* We must wrap the input move. */
 481                 int semi_count = ei_status.stop_page * 256 - ring_offset;
 482                 memcpy_fromio(skb->data, xfer_start, semi_count);
 483                 count -= semi_count;
 484                 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
 485         } else {
 486                 memcpy_fromio(skb->data, xfer_start, count);
 487         }
 488
 489 }
 490
 491 static void ultramca_block_output(struct net_device *dev, int count, const unsigned char *buf,
 492                 int start_page)
 493 {
 494         void __iomem *shmem = ei_status.mem + ((start_page - START_PG) << 8);
 495
 496         memcpy_toio(shmem, buf, count);
 497 }
 498
 499 static int ultramca_close_card(struct net_device *dev)
 500 {
 501         int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
 502
 503         netif_stop_queue(dev);
 504
 505         if (ei_debug > 1)
 506                 printk("%s: Shutting down ethercard.\n", dev->name);
 507
 508         outb(0x00, ioaddr + 6);     /* Disable interrupts. */
 509         free_irq(dev->irq, dev);
 510
 511         NS8390_init(dev, 0);
 512         /* We should someday disable shared memory and change to 8-bit mode
 513          * "just in case"...
 514          */
 515
 516         return 0;
 517 }
 518
 519 static int ultramca_remove(struct device *gen_dev)
 520 {
 521         struct mca_device *mca_dev = to_mca_device(gen_dev);
 522         struct net_device *dev = (struct net_device *)gen_dev->driver_data;
 523
 524         if (dev) {
 525                 /* NB: ultra_close_card() does free_irq */
 526                 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
 527
 528                 unregister_netdev(dev);
 529                 mca_device_set_claim(mca_dev, 0);
 530                 release_region(ioaddr, ULTRA_IO_EXTENT);
 531                 iounmap(ei_status.mem);
 532                 free_netdev(dev);
 533         }
 534         return 0;
 535 }
 536
 537
 538 static struct mca_driver ultra_driver = {
 539         .id_table = smc_mca_adapter_ids,
 540         .driver = {
 541                 .name = "smc-mca",
 542                 .bus = &mca_bus_type,
 543                 .probe = ultramca_probe,
 544                 .remove = ultramca_remove,
 545         }
 546 };
 547
 548 static int __init ultramca_init_module(void)
 549 {
 550         if(!MCA_bus)
 551                 return -ENXIO;
 552
 553         mca_register_driver(&ultra_driver);
 554
 555         return ultra_found ? 0 : -ENXIO;
 556 }
 557
 558 static void __exit ultramca_cleanup_module(void)
 559 {
 560         mca_unregister_driver(&ultra_driver);
 561 }
 562 module_init(ultramca_init_module);
 563 module_exit(ultramca_cleanup_module);
 564