drivers/net/wireless/libertas/if_sdio.c

   1 /*
   2  *  linux/drivers/net/wireless/libertas/if_sdio.c
   3  *
   4  *  Copyright 2007-2008 Pierre Ossman
   5  *
   6  * Inspired by if_cs.c, Copyright 2007 Holger Schurig
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  *
  13  * This hardware has more or less no CMD53 support, so all registers
  14  * must be accessed using sdio_readb()/sdio_writeb().
  15  *
  16  * Transfers must be in one transaction or the firmware goes bonkers.
  17  * This means that the transfer must either be small enough to do a
  18  * byte based transfer or it must be padded to a multiple of the
  19  * current block size.
  20  *
  21  * As SDIO is still new to the kernel, it is unfortunately common with
  22  * bugs in the host controllers related to that. One such bug is that
  23  * controllers cannot do transfers that aren't a multiple of 4 bytes.
  24  * If you don't have time to fix the host controller driver, you can
  25  * work around the problem by modifying if_sdio_host_to_card() and
  26  * if_sdio_card_to_host() to pad the data.
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/firmware.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/delay.h>
  34 #include <linux/mmc/card.h>
  35 #include <linux/mmc/sdio_func.h>
  36 #include <linux/mmc/sdio_ids.h>
  37
  38 #include "host.h"
  39 #include "decl.h"
  40 #include "defs.h"
  41 #include "dev.h"
  42 #include "if_sdio.h"
  43
  44 static char *lbs_helper_name = NULL;
  45 module_param_named(helper_name, lbs_helper_name, charp, 0644);
  46
  47 static char *lbs_fw_name = NULL;
  48 module_param_named(fw_name, lbs_fw_name, charp, 0644);
  49
  50 static const struct sdio_device_id if_sdio_ids[] = {
  51         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
  52         { /* end: all zeroes */                                         },
  53 };
  54
  55 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
  56
  57 struct if_sdio_model {
  58         int model;
  59         const char *helper;
  60         const char *firmware;
  61 };
  62
  63 static struct if_sdio_model if_sdio_models[] = {
  64         {
  65                 /* 8385 */
  66                 .model = 0x04,
  67                 .helper = "sd8385_helper.bin",
  68                 .firmware = "sd8385.bin",
  69         },
  70         {
  71                 /* 8686 */
  72                 .model = 0x0B,
  73                 .helper = "sd8686_helper.bin",
  74                 .firmware = "sd8686.bin",
  75         },
  76 };
  77
  78 struct if_sdio_packet {
  79         struct if_sdio_packet   *next;
  80         u16                     nb;
  81         u8                      buffer[0] __attribute__((aligned(4)));
  82 };
  83
  84 struct if_sdio_card {
  85         struct sdio_func        *func;
  86         struct lbs_private      *priv;
  87
  88         int                     model;
  89         unsigned long           ioport;
  90
  91         const char              *helper;
  92         const char              *firmware;
  93
  94         u8                      buffer[65536];
  95
  96         spinlock_t              lock;
  97         struct if_sdio_packet   *packets;
  98         struct work_struct      packet_worker;
  99 };
 100
 101 /********************************************************************/
 102 /* I/O                                                              */
 103 /********************************************************************/
 104
 105 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 106 {
 107         int ret, reg;
 108         u16 scratch;
 109
 110         if (card->model == 0x04)
 111                 reg = IF_SDIO_SCRATCH_OLD;
 112         else
 113                 reg = IF_SDIO_SCRATCH;
 114
 115         scratch = sdio_readb(card->func, reg, &ret);
 116         if (!ret)
 117                 scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
 118
 119         if (err)
 120                 *err = ret;
 121
 122         if (ret)
 123                 return 0xffff;
 124
 125         return scratch;
 126 }
 127
 128 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 129                 u8 *buffer, unsigned size)
 130 {
 131         struct lbs_private *priv = card->priv;
 132         int ret;
 133         unsigned long flags;
 134         u8 i;
 135
 136         lbs_deb_enter(LBS_DEB_SDIO);
 137
 138         if (size > LBS_CMD_BUFFER_SIZE) {
 139                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 140                         (int)size);
 141                 ret = -E2BIG;
 142                 goto out;
 143         }
 144
 145         spin_lock_irqsave(&priv->driver_lock, flags);
 146
 147         i = (priv->resp_idx == 0) ? 1 : 0;
 148         BUG_ON(priv->resp_len[i]);
 149         priv->resp_len[i] = size;
 150         memcpy(priv->resp_buf[i], buffer, size);
 151         lbs_notify_command_response(priv, i);
 152
 153         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 154
 155         ret = 0;
 156
 157 out:
 158         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 159         return ret;
 160 }
 161
 162 static int if_sdio_handle_data(struct if_sdio_card *card,
 163                 u8 *buffer, unsigned size)
 164 {
 165         int ret;
 166         struct sk_buff *skb;
 167         char *data;
 168
 169         lbs_deb_enter(LBS_DEB_SDIO);
 170
 171         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 172                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 173                         (int)size);
 174                 ret = -E2BIG;
 175                 goto out;
 176         }
 177
 178         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 179         if (!skb) {
 180                 ret = -ENOMEM;
 181                 goto out;
 182         }
 183
 184         skb_reserve(skb, NET_IP_ALIGN);
 185
 186         data = skb_put(skb, size);
 187
 188         memcpy(data, buffer, size);
 189
 190         lbs_process_rxed_packet(card->priv, skb);
 191
 192         ret = 0;
 193
 194 out:
 195         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 196
 197         return ret;
 198 }
 199
 200 static int if_sdio_handle_event(struct if_sdio_card *card,
 201                 u8 *buffer, unsigned size)
 202 {
 203         int ret;
 204         u32 event;
 205
 206         lbs_deb_enter(LBS_DEB_SDIO);
 207
 208         if (card->model == 0x04) {
 209                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 210                 if (ret)
 211                         goto out;
 212         } else {
 213                 if (size < 4) {
 214                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 215                                 (int)size);
 216                         ret = -EINVAL;
 217                         goto out;
 218                 }
 219                 event = buffer[3] << 24;
 220                 event |= buffer[2] << 16;
 221                 event |= buffer[1] << 8;
 222                 event |= buffer[0] << 0;
 223         }
 224
 225         lbs_queue_event(card->priv, event & 0xFF);
 226         ret = 0;
 227
 228 out:
 229         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 230
 231         return ret;
 232 }
 233
 234 static int if_sdio_card_to_host(struct if_sdio_card *card)
 235 {
 236         int ret;
 237         u8 status;
 238         u16 size, type, chunk;
 239         unsigned long timeout;
 240
 241         lbs_deb_enter(LBS_DEB_SDIO);
 242
 243         size = if_sdio_read_scratch(card, &ret);
 244         if (ret)
 245                 goto out;
 246
 247         if (size < 4) {
 248                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 249                         (int)size);
 250                 ret = -EINVAL;
 251                 goto out;
 252         }
 253
 254         timeout = jiffies + HZ;
 255         while (1) {
 256                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 257                 if (ret)
 258                         goto out;
 259                 if (status & IF_SDIO_IO_RDY)
 260                         break;
 261                 if (time_after(jiffies, timeout)) {
 262                         ret = -ETIMEDOUT;
 263                         goto out;
 264                 }
 265                 mdelay(1);
 266         }
 267
 268         /*
 269          * The transfer must be in one transaction or the firmware
 270          * goes suicidal. There's no way to guarantee that for all
 271          * controllers, but we can at least try.
 272          */
 273         chunk = sdio_align_size(card->func, size);
 274
 275         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 276         if (ret)
 277                 goto out;
 278
 279         chunk = card->buffer[0] | (card->buffer[1] << 8);
 280         type = card->buffer[2] | (card->buffer[3] << 8);
 281
 282         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 283                 (int)type, (int)chunk);
 284
 285         if (chunk > size) {
 286                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 287                         (int)chunk, (int)size);
 288                 ret = -EINVAL;
 289                 goto out;
 290         }
 291
 292         if (chunk < size) {
 293                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 294                         (int)chunk, (int)size);
 295         }
 296
 297         switch (type) {
 298         case MVMS_CMD:
 299                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 300                 if (ret)
 301                         goto out;
 302                 break;
 303         case MVMS_DAT:
 304                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 305                 if (ret)
 306                         goto out;
 307                 break;
 308         case MVMS_EVENT:
 309                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 310                 if (ret)
 311                         goto out;
 312                 break;
 313         default:
 314                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 315                                 (int)type);
 316                 ret = -EINVAL;
 317                 goto out;
 318         }
 319
 320 out:
 321         if (ret)
 322                 lbs_pr_err("problem fetching packet from firmware\n");
 323
 324         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 325
 326         return ret;
 327 }
 328
 329 static void if_sdio_host_to_card_worker(struct work_struct *work)
 330 {
 331         struct if_sdio_card *card;
 332         struct if_sdio_packet *packet;
 333         unsigned long timeout;
 334         u8 status;
 335         int ret;
 336         unsigned long flags;
 337
 338         lbs_deb_enter(LBS_DEB_SDIO);
 339
 340         card = container_of(work, struct if_sdio_card, packet_worker);
 341
 342         while (1) {
 343                 spin_lock_irqsave(&card->lock, flags);
 344                 packet = card->packets;
 345                 if (packet)
 346                         card->packets = packet->next;
 347                 spin_unlock_irqrestore(&card->lock, flags);
 348
 349                 if (!packet)
 350                         break;
 351
 352                 sdio_claim_host(card->func);
 353
 354                 timeout = jiffies + HZ;
 355                 while (1) {
 356                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 357                         if (ret)
 358                                 goto release;
 359                         if (status & IF_SDIO_IO_RDY)
 360                                 break;
 361                         if (time_after(jiffies, timeout)) {
 362                                 ret = -ETIMEDOUT;
 363                                 goto release;
 364                         }
 365                         mdelay(1);
 366                 }
 367
 368                 ret = sdio_writesb(card->func, card->ioport,
 369                                 packet->buffer, packet->nb);
 370                 if (ret)
 371                         goto release;
 372 release:
 373                 sdio_release_host(card->func);
 374
 375                 kfree(packet);
 376         }
 377
 378         lbs_deb_leave(LBS_DEB_SDIO);
 379 }
 380
 381 /********************************************************************/
 382 /* Firmware                                                         */
 383 /********************************************************************/
 384
 385 static int if_sdio_prog_helper(struct if_sdio_card *card)
 386 {
 387         int ret;
 388         u8 status;
 389         const struct firmware *fw;
 390         unsigned long timeout;
 391         u8 *chunk_buffer;
 392         u32 chunk_size;
 393         const u8 *firmware;
 394         size_t size;
 395
 396         lbs_deb_enter(LBS_DEB_SDIO);
 397
 398         ret = request_firmware(&fw, card->helper, &card->func->dev);
 399         if (ret) {
 400                 lbs_pr_err("can't load helper firmware\n");
 401                 goto out;
 402         }
 403
 404         chunk_buffer = kzalloc(64, GFP_KERNEL);
 405         if (!chunk_buffer) {
 406                 ret = -ENOMEM;
 407                 goto release_fw;
 408         }
 409
 410         sdio_claim_host(card->func);
 411
 412         ret = sdio_set_block_size(card->func, 32);
 413         if (ret)
 414                 goto release;
 415
 416         firmware = fw->data;
 417         size = fw->size;
 418
 419         while (size) {
 420                 timeout = jiffies + HZ;
 421                 while (1) {
 422                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 423                         if (ret)
 424                                 goto release;
 425                         if ((status & IF_SDIO_IO_RDY) &&
 426                                         (status & IF_SDIO_DL_RDY))
 427                                 break;
 428                         if (time_after(jiffies, timeout)) {
 429                                 ret = -ETIMEDOUT;
 430                                 goto release;
 431                         }
 432                         mdelay(1);
 433                 }
 434
 435                 chunk_size = min(size, (size_t)60);
 436
 437                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 438                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 439 /*
 440                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 441 */
 442                 ret = sdio_writesb(card->func, card->ioport,
 443                                 chunk_buffer, 64);
 444                 if (ret)
 445                         goto release;
 446
 447                 firmware += chunk_size;
 448                 size -= chunk_size;
 449         }
 450
 451         /* an empty block marks the end of the transfer */
 452         memset(chunk_buffer, 0, 4);
 453         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 454         if (ret)
 455                 goto release;
 456
 457         lbs_deb_sdio("waiting for helper to boot...\n");
 458
 459         /* wait for the helper to boot by looking at the size register */
 460         timeout = jiffies + HZ;
 461         while (1) {
 462                 u16 req_size;
 463
 464                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 465                 if (ret)
 466                         goto release;
 467
 468                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 469                 if (ret)
 470                         goto release;
 471
 472                 if (req_size != 0)
 473                         break;
 474
 475                 if (time_after(jiffies, timeout)) {
 476                         ret = -ETIMEDOUT;
 477                         goto release;
 478                 }
 479
 480                 msleep(10);
 481         }
 482
 483         ret = 0;
 484
 485 release:
 486         sdio_set_block_size(card->func, 0);
 487         sdio_release_host(card->func);
 488         kfree(chunk_buffer);
 489 release_fw:
 490         release_firmware(fw);
 491
 492 out:
 493         if (ret)
 494                 lbs_pr_err("failed to load helper firmware\n");
 495
 496         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 497
 498         return ret;
 499 }
 500
 501 static int if_sdio_prog_real(struct if_sdio_card *card)
 502 {
 503         int ret;
 504         u8 status;
 505         const struct firmware *fw;
 506         unsigned long timeout;
 507         u8 *chunk_buffer;
 508         u32 chunk_size;
 509         const u8 *firmware;
 510         size_t size, req_size;
 511
 512         lbs_deb_enter(LBS_DEB_SDIO);
 513
 514         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 515         if (ret) {
 516                 lbs_pr_err("can't load firmware\n");
 517                 goto out;
 518         }
 519
 520         chunk_buffer = kzalloc(512, GFP_KERNEL);
 521         if (!chunk_buffer) {
 522                 ret = -ENOMEM;
 523                 goto release_fw;
 524         }
 525
 526         sdio_claim_host(card->func);
 527
 528         ret = sdio_set_block_size(card->func, 32);
 529         if (ret)
 530                 goto release;
 531
 532         firmware = fw->data;
 533         size = fw->size;
 534
 535         while (size) {
 536                 timeout = jiffies + HZ;
 537                 while (1) {
 538                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 539                         if (ret)
 540                                 goto release;
 541                         if ((status & IF_SDIO_IO_RDY) &&
 542                                         (status & IF_SDIO_DL_RDY))
 543                                 break;
 544                         if (time_after(jiffies, timeout)) {
 545                                 ret = -ETIMEDOUT;
 546                                 goto release;
 547                         }
 548                         mdelay(1);
 549                 }
 550
 551                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 552                 if (ret)
 553                         goto release;
 554
 555                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 556                 if (ret)
 557                         goto release;
 558 /*
 559                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 560 */
 561                 if (req_size == 0) {
 562                         lbs_deb_sdio("firmware helper gave up early\n");
 563                         ret = -EIO;
 564                         goto release;
 565                 }
 566
 567                 if (req_size & 0x01) {
 568                         lbs_deb_sdio("firmware helper signalled error\n");
 569                         ret = -EIO;
 570                         goto release;
 571                 }
 572
 573                 if (req_size > size)
 574                         req_size = size;
 575
 576                 while (req_size) {
 577                         chunk_size = min(req_size, (size_t)512);
 578
 579                         memcpy(chunk_buffer, firmware, chunk_size);
 580 /*
 581                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 582                                 chunk_size, (chunk_size + 31) / 32 * 32);
 583 */
 584                         ret = sdio_writesb(card->func, card->ioport,
 585                                 chunk_buffer, roundup(chunk_size, 32));
 586                         if (ret)
 587                                 goto release;
 588
 589                         firmware += chunk_size;
 590                         size -= chunk_size;
 591                         req_size -= chunk_size;
 592                 }
 593         }
 594
 595         ret = 0;
 596
 597         lbs_deb_sdio("waiting for firmware to boot...\n");
 598
 599         /* wait for the firmware to boot */
 600         timeout = jiffies + HZ;
 601         while (1) {
 602                 u16 scratch;
 603
 604                 scratch = if_sdio_read_scratch(card, &ret);
 605                 if (ret)
 606                         goto release;
 607
 608                 if (scratch == IF_SDIO_FIRMWARE_OK)
 609                         break;
 610
 611                 if (time_after(jiffies, timeout)) {
 612                         ret = -ETIMEDOUT;
 613                         goto release;
 614                 }
 615
 616                 msleep(10);
 617         }
 618
 619         ret = 0;
 620
 621 release:
 622         sdio_set_block_size(card->func, 0);
 623         sdio_release_host(card->func);
 624         kfree(chunk_buffer);
 625 release_fw:
 626         release_firmware(fw);
 627
 628 out:
 629         if (ret)
 630                 lbs_pr_err("failed to load firmware\n");
 631
 632         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 633
 634         return ret;
 635 }
 636
 637 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 638 {
 639         int ret;
 640         u16 scratch;
 641
 642         lbs_deb_enter(LBS_DEB_SDIO);
 643
 644         sdio_claim_host(card->func);
 645         scratch = if_sdio_read_scratch(card, &ret);
 646         sdio_release_host(card->func);
 647
 648         if (ret)
 649                 goto out;
 650
 651         if (scratch == IF_SDIO_FIRMWARE_OK) {
 652                 lbs_deb_sdio("firmware already loaded\n");
 653                 goto success;
 654         }
 655
 656         ret = if_sdio_prog_helper(card);
 657         if (ret)
 658                 goto out;
 659
 660         ret = if_sdio_prog_real(card);
 661         if (ret)
 662                 goto out;
 663
 664 success:
 665         ret = 0;
 666
 667 out:
 668         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 669
 670         return ret;
 671 }
 672
 673 /*******************************************************************/
 674 /* Libertas callbacks                                              */
 675 /*******************************************************************/
 676
 677 static int if_sdio_host_to_card(struct lbs_private *priv,
 678                 u8 type, u8 *buf, u16 nb)
 679 {
 680         int ret;
 681         struct if_sdio_card *card;
 682         struct if_sdio_packet *packet, *cur;
 683         u16 size;
 684         unsigned long flags;
 685
 686         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 687
 688         card = priv->card;
 689
 690         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 691                 ret = -EINVAL;
 692                 goto out;
 693         }
 694
 695         /*
 696          * The transfer must be in one transaction or the firmware
 697          * goes suicidal. There's no way to guarantee that for all
 698          * controllers, but we can at least try.
 699          */
 700         size = sdio_align_size(card->func, nb + 4);
 701
 702         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 703                         GFP_ATOMIC);
 704         if (!packet) {
 705                 ret = -ENOMEM;
 706                 goto out;
 707         }
 708
 709         packet->next = NULL;
 710         packet->nb = size;
 711
 712         /*
 713          * SDIO specific header.
 714          */
 715         packet->buffer[0] = (nb + 4) & 0xff;
 716         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 717         packet->buffer[2] = type;
 718         packet->buffer[3] = 0;
 719
 720         memcpy(packet->buffer + 4, buf, nb);
 721
 722         spin_lock_irqsave(&card->lock, flags);
 723
 724         if (!card->packets)
 725                 card->packets = packet;
 726         else {
 727                 cur = card->packets;
 728                 while (cur->next)
 729                         cur = cur->next;
 730                 cur->next = packet;
 731         }
 732
 733         switch (type) {
 734         case MVMS_CMD:
 735                 priv->dnld_sent = DNLD_CMD_SENT;
 736                 break;
 737         case MVMS_DAT:
 738                 priv->dnld_sent = DNLD_DATA_SENT;
 739                 break;
 740         default:
 741                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 742         }
 743
 744         spin_unlock_irqrestore(&card->lock, flags);
 745
 746         schedule_work(&card->packet_worker);
 747
 748         ret = 0;
 749
 750 out:
 751         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 752
 753         return ret;
 754 }
 755
 756 /*******************************************************************/
 757 /* SDIO callbacks                                                  */
 758 /*******************************************************************/
 759
 760 static void if_sdio_interrupt(struct sdio_func *func)
 761 {
 762         int ret;
 763         struct if_sdio_card *card;
 764         u8 cause;
 765
 766         lbs_deb_enter(LBS_DEB_SDIO);
 767
 768         card = sdio_get_drvdata(func);
 769
 770         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 771         if (ret)
 772                 goto out;
 773
 774         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 775
 776         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 777         if (ret)
 778                 goto out;
 779
 780         /*
 781          * Ignore the define name, this really means the card has
 782          * successfully received the command.
 783          */
 784         if (cause & IF_SDIO_H_INT_DNLD)
 785                 lbs_host_to_card_done(card->priv);
 786
 787
 788         if (cause & IF_SDIO_H_INT_UPLD) {
 789                 ret = if_sdio_card_to_host(card);
 790                 if (ret)
 791                         goto out;
 792         }
 793
 794         ret = 0;
 795
 796 out:
 797         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 798 }
 799
 800 static int if_sdio_probe(struct sdio_func *func,
 801                 const struct sdio_device_id *id)
 802 {
 803         struct if_sdio_card *card;
 804         struct lbs_private *priv;
 805         int ret, i;
 806         unsigned int model;
 807         struct if_sdio_packet *packet;
 808
 809         lbs_deb_enter(LBS_DEB_SDIO);
 810
 811         for (i = 0;i < func->card->num_info;i++) {
 812                 if (sscanf(func->card->info[i],
 813                                 "802.11 SDIO ID: %x", &model) == 1)
 814                         break;
 815                 if (sscanf(func->card->info[i],
 816                                 "ID: %x", &model) == 1)
 817                         break;
 818                if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 819                        model = 4;
 820                        break;
 821                }
 822         }
 823
 824         if (i == func->card->num_info) {
 825                 lbs_pr_err("unable to identify card model\n");
 826                 return -ENODEV;
 827         }
 828
 829         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 830         if (!card)
 831                 return -ENOMEM;
 832
 833         card->func = func;
 834         card->model = model;
 835         spin_lock_init(&card->lock);
 836         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 837
 838         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 839                 if (card->model == if_sdio_models[i].model)
 840                         break;
 841         }
 842
 843         if (i == ARRAY_SIZE(if_sdio_models)) {
 844                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 845                 ret = -ENODEV;
 846                 goto free;
 847         }
 848
 849         card->helper = if_sdio_models[i].helper;
 850         card->firmware = if_sdio_models[i].firmware;
 851
 852         if (lbs_helper_name) {
 853                 lbs_deb_sdio("overriding helper firmware: %s\n",
 854                         lbs_helper_name);
 855                 card->helper = lbs_helper_name;
 856         }
 857
 858         if (lbs_fw_name) {
 859                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 860                 card->firmware = lbs_fw_name;
 861         }
 862
 863         sdio_claim_host(func);
 864
 865         ret = sdio_enable_func(func);
 866         if (ret)
 867                 goto release;
 868
 869         ret = sdio_claim_irq(func, if_sdio_interrupt);
 870         if (ret)
 871                 goto disable;
 872
 873         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 874         if (ret)
 875                 goto release_int;
 876
 877         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 878         if (ret)
 879                 goto release_int;
 880
 881         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 882         if (ret)
 883                 goto release_int;
 884
 885         sdio_release_host(func);
 886
 887         sdio_set_drvdata(func, card);
 888
 889         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 890                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 891                         func->class, func->vendor, func->device,
 892                         model, (unsigned)card->ioport);
 893
 894         ret = if_sdio_prog_firmware(card);
 895         if (ret)
 896                 goto reclaim;
 897
 898         priv = lbs_add_card(card, &func->dev);
 899         if (!priv) {
 900                 ret = -ENOMEM;
 901                 goto reclaim;
 902         }
 903
 904         card->priv = priv;
 905
 906         priv->card = card;
 907         priv->hw_host_to_card = if_sdio_host_to_card;
 908
 909         priv->fw_ready = 1;
 910
 911         /*
 912          * Enable interrupts now that everything is set up
 913          */
 914         sdio_claim_host(func);
 915         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 916         sdio_release_host(func);
 917         if (ret)
 918                 goto reclaim;
 919
 920         ret = lbs_start_card(priv);
 921         if (ret)
 922                 goto err_activate_card;
 923
 924 out:
 925         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 926
 927         return ret;
 928
 929 err_activate_card:
 930         flush_scheduled_work();
 931         free_netdev(priv->dev);
 932         kfree(priv);
 933 reclaim:
 934         sdio_claim_host(func);
 935 release_int:
 936         sdio_release_irq(func);
 937 disable:
 938         sdio_disable_func(func);
 939 release:
 940         sdio_release_host(func);
 941 free:
 942         while (card->packets) {
 943                 packet = card->packets;
 944                 card->packets = card->packets->next;
 945                 kfree(packet);
 946         }
 947
 948         kfree(card);
 949
 950         goto out;
 951 }
 952
 953 static void if_sdio_remove(struct sdio_func *func)
 954 {
 955         struct if_sdio_card *card;
 956         struct if_sdio_packet *packet;
 957
 958         lbs_deb_enter(LBS_DEB_SDIO);
 959
 960         card = sdio_get_drvdata(func);
 961
 962         card->priv->surpriseremoved = 1;
 963
 964         lbs_deb_sdio("call remove card\n");
 965         lbs_stop_card(card->priv);
 966         lbs_remove_card(card->priv);
 967
 968         flush_scheduled_work();
 969
 970         sdio_claim_host(func);
 971         sdio_release_irq(func);
 972         sdio_disable_func(func);
 973         sdio_release_host(func);
 974
 975         while (card->packets) {
 976                 packet = card->packets;
 977                 card->packets = card->packets->next;
 978                 kfree(packet);
 979         }
 980
 981         kfree(card);
 982
 983         lbs_deb_leave(LBS_DEB_SDIO);
 984 }
 985
 986 static struct sdio_driver if_sdio_driver = {
 987         .name           = "libertas_sdio",
 988         .id_table       = if_sdio_ids,
 989         .probe          = if_sdio_probe,
 990         .remove         = if_sdio_remove,
 991 };
 992
 993 /*******************************************************************/
 994 /* Module functions                                                */
 995 /*******************************************************************/
 996
 997 static int __init if_sdio_init_module(void)
 998 {
 999         int ret = 0;
1000
1001         lbs_deb_enter(LBS_DEB_SDIO);
1002
1003         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1004         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1005
1006         ret = sdio_register_driver(&if_sdio_driver);
1007
1008         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1009
1010         return ret;
1011 }
1012
1013 static void __exit if_sdio_exit_module(void)
1014 {
1015         lbs_deb_enter(LBS_DEB_SDIO);
1016
1017         sdio_unregister_driver(&if_sdio_driver);
1018
1019         lbs_deb_leave(LBS_DEB_SDIO);
1020 }
1021
1022 module_init(if_sdio_init_module);
1023 module_exit(if_sdio_exit_module);
1024
1025 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1026 MODULE_AUTHOR("Pierre Ossman");
1027 MODULE_LICENSE("GPL");