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   1 /*
   2  *  linux/drivers/net/wireless/libertas/if_sdio.c
   3  *
   4  *  Copyright 2007 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/moduleparam.h>
  30 #include <linux/firmware.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/delay.h>
  33 #include <linux/mmc/card.h>
  34 #include <linux/mmc/sdio_func.h>
  35 #include <linux/mmc/sdio_ids.h>
  36
  37 #include "host.h"
  38 #include "decl.h"
  39 #include "defs.h"
  40 #include "dev.h"
  41 #include "if_sdio.h"
  42
  43 static char *lbs_helper_name = NULL;
  44 module_param_named(helper_name, lbs_helper_name, charp, 0644);
  45
  46 static char *lbs_fw_name = NULL;
  47 module_param_named(fw_name, lbs_fw_name, charp, 0644);
  48
  49 static const struct sdio_device_id if_sdio_ids[] = {
  50         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
  51         { /* end: all zeroes */                                         },
  52 };
  53
  54 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
  55
  56 struct if_sdio_model {
  57         int model;
  58         const char *helper;
  59         const char *firmware;
  60 };
  61
  62 static struct if_sdio_model if_sdio_models[] = {
  63         {
  64                 /* 8385 */
  65                 .model = 0x04,
  66                 .helper = "sd8385_helper.bin",
  67                 .firmware = "sd8385.bin",
  68         },
  69         {
  70                 /* 8686 */
  71                 .model = 0x0B,
  72                 .helper = "sd8686_helper.bin",
  73                 .firmware = "sd8686.bin",
  74         },
  75 };
  76
  77 struct if_sdio_packet {
  78         struct if_sdio_packet   *next;
  79         u16                     nb;
  80         u8                      buffer[0] __attribute__((aligned(4)));
  81 };
  82
  83 struct if_sdio_card {
  84         struct sdio_func        *func;
  85         struct lbs_private      *priv;
  86
  87         int                     model;
  88         unsigned long           ioport;
  89
  90         const char              *helper;
  91         const char              *firmware;
  92
  93         u8                      buffer[65536];
  94
  95         spinlock_t              lock;
  96         struct if_sdio_packet   *packets;
  97         struct work_struct      packet_worker;
  98 };
  99
 100 /********************************************************************/
 101 /* I/O                                                              */
 102 /********************************************************************/
 103
 104 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 105 {
 106         int ret, reg;
 107         u16 scratch;
 108
 109         if (card->model == 0x04)
 110                 reg = IF_SDIO_SCRATCH_OLD;
 111         else
 112                 reg = IF_SDIO_SCRATCH;
 113
 114         scratch = sdio_readb(card->func, reg, &ret);
 115         if (!ret)
 116                 scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
 117
 118         if (err)
 119                 *err = ret;
 120
 121         if (ret)
 122                 return 0xffff;
 123
 124         return scratch;
 125 }
 126
 127 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 128                 u8 *buffer, unsigned size)
 129 {
 130         struct lbs_private *priv = card->priv;
 131         int ret;
 132         unsigned long flags;
 133         u8 i;
 134
 135         lbs_deb_enter(LBS_DEB_SDIO);
 136
 137         if (size > LBS_CMD_BUFFER_SIZE) {
 138                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 139                         (int)size);
 140                 ret = -E2BIG;
 141                 goto out;
 142         }
 143
 144         spin_lock_irqsave(&priv->driver_lock, flags);
 145
 146         i = (priv->resp_idx == 0) ? 1 : 0;
 147         BUG_ON(priv->resp_len[i]);
 148         priv->resp_len[i] = size;
 149         memcpy(priv->resp_buf[i], buffer, size);
 150         lbs_notify_command_response(priv, i);
 151
 152         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 153
 154         ret = 0;
 155
 156 out:
 157         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 158         return ret;
 159 }
 160
 161 static int if_sdio_handle_data(struct if_sdio_card *card,
 162                 u8 *buffer, unsigned size)
 163 {
 164         int ret;
 165         struct sk_buff *skb;
 166         char *data;
 167
 168         lbs_deb_enter(LBS_DEB_SDIO);
 169
 170         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 171                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 172                         (int)size);
 173                 ret = -E2BIG;
 174                 goto out;
 175         }
 176
 177         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 178         if (!skb) {
 179                 ret = -ENOMEM;
 180                 goto out;
 181         }
 182
 183         skb_reserve(skb, NET_IP_ALIGN);
 184
 185         data = skb_put(skb, size);
 186
 187         memcpy(data, buffer, size);
 188
 189         lbs_process_rxed_packet(card->priv, skb);
 190
 191         ret = 0;
 192
 193 out:
 194         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 195
 196         return ret;
 197 }
 198
 199 static int if_sdio_handle_event(struct if_sdio_card *card,
 200                 u8 *buffer, unsigned size)
 201 {
 202         int ret;
 203         u32 event;
 204
 205         lbs_deb_enter(LBS_DEB_SDIO);
 206
 207         if (card->model == 0x04) {
 208                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 209                 if (ret)
 210                         goto out;
 211         } else {
 212                 if (size < 4) {
 213                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 214                                 (int)size);
 215                         ret = -EINVAL;
 216                         goto out;
 217                 }
 218                 event = buffer[3] << 24;
 219                 event |= buffer[2] << 16;
 220                 event |= buffer[1] << 8;
 221                 event |= buffer[0] << 0;
 222         }
 223
 224         lbs_queue_event(card->priv, event & 0xFF);
 225         ret = 0;
 226
 227 out:
 228         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 229
 230         return ret;
 231 }
 232
 233 static int if_sdio_card_to_host(struct if_sdio_card *card)
 234 {
 235         int ret;
 236         u8 status;
 237         u16 size, type, chunk;
 238         unsigned long timeout;
 239
 240         lbs_deb_enter(LBS_DEB_SDIO);
 241
 242         size = if_sdio_read_scratch(card, &ret);
 243         if (ret)
 244                 goto out;
 245
 246         if (size < 4) {
 247                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 248                         (int)size);
 249                 ret = -EINVAL;
 250                 goto out;
 251         }
 252
 253         timeout = jiffies + HZ;
 254         while (1) {
 255                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 256                 if (ret)
 257                         goto out;
 258                 if (status & IF_SDIO_IO_RDY)
 259                         break;
 260                 if (time_after(jiffies, timeout)) {
 261                         ret = -ETIMEDOUT;
 262                         goto out;
 263                 }
 264                 mdelay(1);
 265         }
 266
 267         /*
 268          * The transfer must be in one transaction or the firmware
 269          * goes suicidal.
 270          */
 271         chunk = size;
 272         if ((chunk > card->func->cur_blksize) || (chunk > 512)) {
 273                 chunk = (chunk + card->func->cur_blksize - 1) /
 274                         card->func->cur_blksize * card->func->cur_blksize;
 275         }
 276
 277         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 278         if (ret)
 279                 goto out;
 280
 281         chunk = card->buffer[0] | (card->buffer[1] << 8);
 282         type = card->buffer[2] | (card->buffer[3] << 8);
 283
 284         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 285                 (int)type, (int)chunk);
 286
 287         if (chunk > size) {
 288                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 289                         (int)chunk, (int)size);
 290                 ret = -EINVAL;
 291                 goto out;
 292         }
 293
 294         if (chunk < size) {
 295                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 296                         (int)chunk, (int)size);
 297         }
 298
 299         switch (type) {
 300         case MVMS_CMD:
 301                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 302                 if (ret)
 303                         goto out;
 304                 break;
 305         case MVMS_DAT:
 306                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 307                 if (ret)
 308                         goto out;
 309                 break;
 310         case MVMS_EVENT:
 311                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 312                 if (ret)
 313                         goto out;
 314                 break;
 315         default:
 316                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 317                                 (int)type);
 318                 ret = -EINVAL;
 319                 goto out;
 320         }
 321
 322 out:
 323         if (ret)
 324                 lbs_pr_err("problem fetching packet from firmware\n");
 325
 326         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 327
 328         return ret;
 329 }
 330
 331 static void if_sdio_host_to_card_worker(struct work_struct *work)
 332 {
 333         struct if_sdio_card *card;
 334         struct if_sdio_packet *packet;
 335         unsigned long timeout;
 336         u8 status;
 337         int ret;
 338         unsigned long flags;
 339
 340         lbs_deb_enter(LBS_DEB_SDIO);
 341
 342         card = container_of(work, struct if_sdio_card, packet_worker);
 343
 344         while (1) {
 345                 spin_lock_irqsave(&card->lock, flags);
 346                 packet = card->packets;
 347                 if (packet)
 348                         card->packets = packet->next;
 349                 spin_unlock_irqrestore(&card->lock, flags);
 350
 351                 if (!packet)
 352                         break;
 353
 354                 sdio_claim_host(card->func);
 355
 356                 timeout = jiffies + HZ;
 357                 while (1) {
 358                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 359                         if (ret)
 360                                 goto release;
 361                         if (status & IF_SDIO_IO_RDY)
 362                                 break;
 363                         if (time_after(jiffies, timeout)) {
 364                                 ret = -ETIMEDOUT;
 365                                 goto release;
 366                         }
 367                         mdelay(1);
 368                 }
 369
 370                 ret = sdio_writesb(card->func, card->ioport,
 371                                 packet->buffer, packet->nb);
 372                 if (ret)
 373                         goto release;
 374 release:
 375                 sdio_release_host(card->func);
 376
 377                 kfree(packet);
 378         }
 379
 380         lbs_deb_leave(LBS_DEB_SDIO);
 381 }
 382
 383 /********************************************************************/
 384 /* Firmware                                                         */
 385 /********************************************************************/
 386
 387 static int if_sdio_prog_helper(struct if_sdio_card *card)
 388 {
 389         int ret;
 390         u8 status;
 391         const struct firmware *fw;
 392         unsigned long timeout;
 393         u8 *chunk_buffer;
 394         u32 chunk_size;
 395         const u8 *firmware;
 396         size_t size;
 397
 398         lbs_deb_enter(LBS_DEB_SDIO);
 399
 400         ret = request_firmware(&fw, card->helper, &card->func->dev);
 401         if (ret) {
 402                 lbs_pr_err("can't load helper firmware\n");
 403                 goto out;
 404         }
 405
 406         chunk_buffer = kzalloc(64, GFP_KERNEL);
 407         if (!chunk_buffer) {
 408                 ret = -ENOMEM;
 409                 goto release_fw;
 410         }
 411
 412         sdio_claim_host(card->func);
 413
 414         ret = sdio_set_block_size(card->func, 32);
 415         if (ret)
 416                 goto release;
 417
 418         firmware = fw->data;
 419         size = fw->size;
 420
 421         while (size) {
 422                 timeout = jiffies + HZ;
 423                 while (1) {
 424                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 425                         if (ret)
 426                                 goto release;
 427                         if ((status & IF_SDIO_IO_RDY) &&
 428                                         (status & IF_SDIO_DL_RDY))
 429                                 break;
 430                         if (time_after(jiffies, timeout)) {
 431                                 ret = -ETIMEDOUT;
 432                                 goto release;
 433                         }
 434                         mdelay(1);
 435                 }
 436
 437                 chunk_size = min(size, (size_t)60);
 438
 439                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 440                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 441 /*
 442                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 443 */
 444                 ret = sdio_writesb(card->func, card->ioport,
 445                                 chunk_buffer, 64);
 446                 if (ret)
 447                         goto release;
 448
 449                 firmware += chunk_size;
 450                 size -= chunk_size;
 451         }
 452
 453         /* an empty block marks the end of the transfer */
 454         memset(chunk_buffer, 0, 4);
 455         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 456         if (ret)
 457                 goto release;
 458
 459         lbs_deb_sdio("waiting for helper to boot...\n");
 460
 461         /* wait for the helper to boot by looking at the size register */
 462         timeout = jiffies + HZ;
 463         while (1) {
 464                 u16 req_size;
 465
 466                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 467                 if (ret)
 468                         goto release;
 469
 470                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 471                 if (ret)
 472                         goto release;
 473
 474                 if (req_size != 0)
 475                         break;
 476
 477                 if (time_after(jiffies, timeout)) {
 478                         ret = -ETIMEDOUT;
 479                         goto release;
 480                 }
 481
 482                 msleep(10);
 483         }
 484
 485         ret = 0;
 486
 487 release:
 488         sdio_set_block_size(card->func, 0);
 489         sdio_release_host(card->func);
 490         kfree(chunk_buffer);
 491 release_fw:
 492         release_firmware(fw);
 493
 494 out:
 495         if (ret)
 496                 lbs_pr_err("failed to load helper firmware\n");
 497
 498         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 499
 500         return ret;
 501 }
 502
 503 static int if_sdio_prog_real(struct if_sdio_card *card)
 504 {
 505         int ret;
 506         u8 status;
 507         const struct firmware *fw;
 508         unsigned long timeout;
 509         u8 *chunk_buffer;
 510         u32 chunk_size;
 511         const u8 *firmware;
 512         size_t size, req_size;
 513
 514         lbs_deb_enter(LBS_DEB_SDIO);
 515
 516         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 517         if (ret) {
 518                 lbs_pr_err("can't load firmware\n");
 519                 goto out;
 520         }
 521
 522         chunk_buffer = kzalloc(512, GFP_KERNEL);
 523         if (!chunk_buffer) {
 524                 ret = -ENOMEM;
 525                 goto release_fw;
 526         }
 527
 528         sdio_claim_host(card->func);
 529
 530         ret = sdio_set_block_size(card->func, 32);
 531         if (ret)
 532                 goto release;
 533
 534         firmware = fw->data;
 535         size = fw->size;
 536
 537         while (size) {
 538                 timeout = jiffies + HZ;
 539                 while (1) {
 540                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 541                         if (ret)
 542                                 goto release;
 543                         if ((status & IF_SDIO_IO_RDY) &&
 544                                         (status & IF_SDIO_DL_RDY))
 545                                 break;
 546                         if (time_after(jiffies, timeout)) {
 547                                 ret = -ETIMEDOUT;
 548                                 goto release;
 549                         }
 550                         mdelay(1);
 551                 }
 552
 553                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 554                 if (ret)
 555                         goto release;
 556
 557                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 558                 if (ret)
 559                         goto release;
 560 /*
 561                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 562 */
 563                 if (req_size == 0) {
 564                         lbs_deb_sdio("firmware helper gave up early\n");
 565                         ret = -EIO;
 566                         goto release;
 567                 }
 568
 569                 if (req_size & 0x01) {
 570                         lbs_deb_sdio("firmware helper signalled error\n");
 571                         ret = -EIO;
 572                         goto release;
 573                 }
 574
 575                 if (req_size > size)
 576                         req_size = size;
 577
 578                 while (req_size) {
 579                         chunk_size = min(req_size, (size_t)512);
 580
 581                         memcpy(chunk_buffer, firmware, chunk_size);
 582 /*
 583                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 584                                 chunk_size, (chunk_size + 31) / 32 * 32);
 585 */
 586                         ret = sdio_writesb(card->func, card->ioport,
 587                                 chunk_buffer, (chunk_size + 31) / 32 * 32);
 588                         if (ret)
 589                                 goto release;
 590
 591                         firmware += chunk_size;
 592                         size -= chunk_size;
 593                         req_size -= chunk_size;
 594                 }
 595         }
 596
 597         ret = 0;
 598
 599         lbs_deb_sdio("waiting for firmware to boot...\n");
 600
 601         /* wait for the firmware to boot */
 602         timeout = jiffies + HZ;
 603         while (1) {
 604                 u16 scratch;
 605
 606                 scratch = if_sdio_read_scratch(card, &ret);
 607                 if (ret)
 608                         goto release;
 609
 610                 if (scratch == IF_SDIO_FIRMWARE_OK)
 611                         break;
 612
 613                 if (time_after(jiffies, timeout)) {
 614                         ret = -ETIMEDOUT;
 615                         goto release;
 616                 }
 617
 618                 msleep(10);
 619         }
 620
 621         ret = 0;
 622
 623 release:
 624         sdio_set_block_size(card->func, 0);
 625         sdio_release_host(card->func);
 626         kfree(chunk_buffer);
 627 release_fw:
 628         release_firmware(fw);
 629
 630 out:
 631         if (ret)
 632                 lbs_pr_err("failed to load firmware\n");
 633
 634         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 635
 636         return ret;
 637 }
 638
 639 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 640 {
 641         int ret;
 642         u16 scratch;
 643
 644         lbs_deb_enter(LBS_DEB_SDIO);
 645
 646         sdio_claim_host(card->func);
 647         scratch = if_sdio_read_scratch(card, &ret);
 648         sdio_release_host(card->func);
 649
 650         if (ret)
 651                 goto out;
 652
 653         if (scratch == IF_SDIO_FIRMWARE_OK) {
 654                 lbs_deb_sdio("firmware already loaded\n");
 655                 goto success;
 656         }
 657
 658         ret = if_sdio_prog_helper(card);
 659         if (ret)
 660                 goto out;
 661
 662         ret = if_sdio_prog_real(card);
 663         if (ret)
 664                 goto out;
 665
 666 success:
 667         ret = 0;
 668
 669 out:
 670         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 671
 672         return ret;
 673 }
 674
 675 /*******************************************************************/
 676 /* Libertas callbacks                                              */
 677 /*******************************************************************/
 678
 679 static int if_sdio_host_to_card(struct lbs_private *priv,
 680                 u8 type, u8 *buf, u16 nb)
 681 {
 682         int ret;
 683         struct if_sdio_card *card;
 684         struct if_sdio_packet *packet, *cur;
 685         u16 size;
 686         unsigned long flags;
 687
 688         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 689
 690         card = priv->card;
 691
 692         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 693                 ret = -EINVAL;
 694                 goto out;
 695         }
 696
 697         /*
 698          * The transfer must be in one transaction or the firmware
 699          * goes suicidal.
 700          */
 701         size = nb + 4;
 702         if ((size > card->func->cur_blksize) || (size > 512)) {
 703                 size = (size + card->func->cur_blksize - 1) /
 704                         card->func->cur_blksize * card->func->cur_blksize;
 705         }
 706
 707         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 708                         GFP_ATOMIC);
 709         if (!packet) {
 710                 ret = -ENOMEM;
 711                 goto out;
 712         }
 713
 714         packet->next = NULL;
 715         packet->nb = size;
 716
 717         /*
 718          * SDIO specific header.
 719          */
 720         packet->buffer[0] = (nb + 4) & 0xff;
 721         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 722         packet->buffer[2] = type;
 723         packet->buffer[3] = 0;
 724
 725         memcpy(packet->buffer + 4, buf, nb);
 726
 727         spin_lock_irqsave(&card->lock, flags);
 728
 729         if (!card->packets)
 730                 card->packets = packet;
 731         else {
 732                 cur = card->packets;
 733                 while (cur->next)
 734                         cur = cur->next;
 735                 cur->next = packet;
 736         }
 737
 738         switch (type) {
 739         case MVMS_CMD:
 740                 priv->dnld_sent = DNLD_CMD_SENT;
 741                 break;
 742         case MVMS_DAT:
 743                 priv->dnld_sent = DNLD_DATA_SENT;
 744                 break;
 745         default:
 746                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 747         }
 748
 749         spin_unlock_irqrestore(&card->lock, flags);
 750
 751         schedule_work(&card->packet_worker);
 752
 753         ret = 0;
 754
 755 out:
 756         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 757
 758         return ret;
 759 }
 760
 761 /*******************************************************************/
 762 /* SDIO callbacks                                                  */
 763 /*******************************************************************/
 764
 765 static void if_sdio_interrupt(struct sdio_func *func)
 766 {
 767         int ret;
 768         struct if_sdio_card *card;
 769         u8 cause;
 770
 771         lbs_deb_enter(LBS_DEB_SDIO);
 772
 773         card = sdio_get_drvdata(func);
 774
 775         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 776         if (ret)
 777                 goto out;
 778
 779         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 780
 781         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 782         if (ret)
 783                 goto out;
 784
 785         /*
 786          * Ignore the define name, this really means the card has
 787          * successfully received the command.
 788          */
 789         if (cause & IF_SDIO_H_INT_DNLD)
 790                 lbs_host_to_card_done(card->priv);
 791
 792
 793         if (cause & IF_SDIO_H_INT_UPLD) {
 794                 ret = if_sdio_card_to_host(card);
 795                 if (ret)
 796                         goto out;
 797         }
 798
 799         ret = 0;
 800
 801 out:
 802         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 803 }
 804
 805 static int if_sdio_probe(struct sdio_func *func,
 806                 const struct sdio_device_id *id)
 807 {
 808         struct if_sdio_card *card;
 809         struct lbs_private *priv;
 810         int ret, i;
 811         unsigned int model;
 812         struct if_sdio_packet *packet;
 813
 814         lbs_deb_enter(LBS_DEB_SDIO);
 815
 816         for (i = 0;i < func->card->num_info;i++) {
 817                 if (sscanf(func->card->info[i],
 818                                 "802.11 SDIO ID: %x", &model) == 1)
 819                         break;
 820                 if (sscanf(func->card->info[i],
 821                                 "ID: %x", &model) == 1)
 822                         break;
 823                if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 824                        model = 4;
 825                        break;
 826                }
 827         }
 828
 829         if (i == func->card->num_info) {
 830                 lbs_pr_err("unable to identify card model\n");
 831                 return -ENODEV;
 832         }
 833
 834         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 835         if (!card)
 836                 return -ENOMEM;
 837
 838         card->func = func;
 839         card->model = model;
 840         spin_lock_init(&card->lock);
 841         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 842
 843         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 844                 if (card->model == if_sdio_models[i].model)
 845                         break;
 846         }
 847
 848         if (i == ARRAY_SIZE(if_sdio_models)) {
 849                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 850                 ret = -ENODEV;
 851                 goto free;
 852         }
 853
 854         card->helper = if_sdio_models[i].helper;
 855         card->firmware = if_sdio_models[i].firmware;
 856
 857         if (lbs_helper_name) {
 858                 lbs_deb_sdio("overriding helper firmware: %s\n",
 859                         lbs_helper_name);
 860                 card->helper = lbs_helper_name;
 861         }
 862
 863         if (lbs_fw_name) {
 864                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 865                 card->firmware = lbs_fw_name;
 866         }
 867
 868         sdio_claim_host(func);
 869
 870         ret = sdio_enable_func(func);
 871         if (ret)
 872                 goto release;
 873
 874         ret = sdio_claim_irq(func, if_sdio_interrupt);
 875         if (ret)
 876                 goto disable;
 877
 878         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 879         if (ret)
 880                 goto release_int;
 881
 882         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 883         if (ret)
 884                 goto release_int;
 885
 886         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 887         if (ret)
 888                 goto release_int;
 889
 890         sdio_release_host(func);
 891
 892         sdio_set_drvdata(func, card);
 893
 894         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 895                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 896                         func->class, func->vendor, func->device,
 897                         model, (unsigned)card->ioport);
 898
 899         ret = if_sdio_prog_firmware(card);
 900         if (ret)
 901                 goto reclaim;
 902
 903         priv = lbs_add_card(card, &func->dev);
 904         if (!priv) {
 905                 ret = -ENOMEM;
 906                 goto reclaim;
 907         }
 908
 909         card->priv = priv;
 910
 911         priv->card = card;
 912         priv->hw_host_to_card = if_sdio_host_to_card;
 913
 914         priv->fw_ready = 1;
 915
 916         /*
 917          * Enable interrupts now that everything is set up
 918          */
 919         sdio_claim_host(func);
 920         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 921         sdio_release_host(func);
 922         if (ret)
 923                 goto reclaim;
 924
 925         ret = lbs_start_card(priv);
 926         if (ret)
 927                 goto err_activate_card;
 928
 929 out:
 930         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 931
 932         return ret;
 933
 934 err_activate_card:
 935         flush_scheduled_work();
 936         free_netdev(priv->dev);
 937         kfree(priv);
 938 reclaim:
 939         sdio_claim_host(func);
 940 release_int:
 941         sdio_release_irq(func);
 942 disable:
 943         sdio_disable_func(func);
 944 release:
 945         sdio_release_host(func);
 946 free:
 947         while (card->packets) {
 948                 packet = card->packets;
 949                 card->packets = card->packets->next;
 950                 kfree(packet);
 951         }
 952
 953         kfree(card);
 954
 955         goto out;
 956 }
 957
 958 static void if_sdio_remove(struct sdio_func *func)
 959 {
 960         struct if_sdio_card *card;
 961         struct if_sdio_packet *packet;
 962
 963         lbs_deb_enter(LBS_DEB_SDIO);
 964
 965         card = sdio_get_drvdata(func);
 966
 967         card->priv->surpriseremoved = 1;
 968
 969         lbs_deb_sdio("call remove card\n");
 970         lbs_stop_card(card->priv);
 971         lbs_remove_card(card->priv);
 972
 973         flush_scheduled_work();
 974
 975         sdio_claim_host(func);
 976         sdio_release_irq(func);
 977         sdio_disable_func(func);
 978         sdio_release_host(func);
 979
 980         while (card->packets) {
 981                 packet = card->packets;
 982                 card->packets = card->packets->next;
 983                 kfree(packet);
 984         }
 985
 986         kfree(card);
 987
 988         lbs_deb_leave(LBS_DEB_SDIO);
 989 }
 990
 991 static struct sdio_driver if_sdio_driver = {
 992         .name           = "libertas_sdio",
 993         .id_table       = if_sdio_ids,
 994         .probe          = if_sdio_probe,
 995         .remove         = if_sdio_remove,
 996 };
 997
 998 /*******************************************************************/
 999 /* Module functions                                                */
1000 /*******************************************************************/
1001
1002 static int __init if_sdio_init_module(void)
1003 {
1004         int ret = 0;
1005
1006         lbs_deb_enter(LBS_DEB_SDIO);
1007
1008         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1009         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1010
1011         ret = sdio_register_driver(&if_sdio_driver);
1012
1013         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1014
1015         return ret;
1016 }
1017
1018 static void __exit if_sdio_exit_module(void)
1019 {
1020         lbs_deb_enter(LBS_DEB_SDIO);
1021
1022         sdio_unregister_driver(&if_sdio_driver);
1023
1024         lbs_deb_leave(LBS_DEB_SDIO);
1025 }
1026
1027 module_init(if_sdio_init_module);
1028 module_exit(if_sdio_exit_module);
1029
1030 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1031 MODULE_AUTHOR("Pierre Ossman");
1032 MODULE_LICENSE("GPL");