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   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/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. There's no way to guarantee that for all
 270          * controllers, but we can at least try.
 271          */
 272         chunk = sdio_align_size(card->func, size);
 273
 274         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 275         if (ret)
 276                 goto out;
 277
 278         chunk = card->buffer[0] | (card->buffer[1] << 8);
 279         type = card->buffer[2] | (card->buffer[3] << 8);
 280
 281         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 282                 (int)type, (int)chunk);
 283
 284         if (chunk > size) {
 285                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 286                         (int)chunk, (int)size);
 287                 ret = -EINVAL;
 288                 goto out;
 289         }
 290
 291         if (chunk < size) {
 292                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 293                         (int)chunk, (int)size);
 294         }
 295
 296         switch (type) {
 297         case MVMS_CMD:
 298                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 299                 if (ret)
 300                         goto out;
 301                 break;
 302         case MVMS_DAT:
 303                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 304                 if (ret)
 305                         goto out;
 306                 break;
 307         case MVMS_EVENT:
 308                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 309                 if (ret)
 310                         goto out;
 311                 break;
 312         default:
 313                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 314                                 (int)type);
 315                 ret = -EINVAL;
 316                 goto out;
 317         }
 318
 319 out:
 320         if (ret)
 321                 lbs_pr_err("problem fetching packet from firmware\n");
 322
 323         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 324
 325         return ret;
 326 }
 327
 328 static void if_sdio_host_to_card_worker(struct work_struct *work)
 329 {
 330         struct if_sdio_card *card;
 331         struct if_sdio_packet *packet;
 332         unsigned long timeout;
 333         u8 status;
 334         int ret;
 335         unsigned long flags;
 336
 337         lbs_deb_enter(LBS_DEB_SDIO);
 338
 339         card = container_of(work, struct if_sdio_card, packet_worker);
 340
 341         while (1) {
 342                 spin_lock_irqsave(&card->lock, flags);
 343                 packet = card->packets;
 344                 if (packet)
 345                         card->packets = packet->next;
 346                 spin_unlock_irqrestore(&card->lock, flags);
 347
 348                 if (!packet)
 349                         break;
 350
 351                 sdio_claim_host(card->func);
 352
 353                 timeout = jiffies + HZ;
 354                 while (1) {
 355                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 356                         if (ret)
 357                                 goto release;
 358                         if (status & IF_SDIO_IO_RDY)
 359                                 break;
 360                         if (time_after(jiffies, timeout)) {
 361                                 ret = -ETIMEDOUT;
 362                                 goto release;
 363                         }
 364                         mdelay(1);
 365                 }
 366
 367                 ret = sdio_writesb(card->func, card->ioport,
 368                                 packet->buffer, packet->nb);
 369                 if (ret)
 370                         goto release;
 371 release:
 372                 sdio_release_host(card->func);
 373
 374                 kfree(packet);
 375         }
 376
 377         lbs_deb_leave(LBS_DEB_SDIO);
 378 }
 379
 380 /********************************************************************/
 381 /* Firmware                                                         */
 382 /********************************************************************/
 383
 384 static int if_sdio_prog_helper(struct if_sdio_card *card)
 385 {
 386         int ret;
 387         u8 status;
 388         const struct firmware *fw;
 389         unsigned long timeout;
 390         u8 *chunk_buffer;
 391         u32 chunk_size;
 392         const u8 *firmware;
 393         size_t size;
 394
 395         lbs_deb_enter(LBS_DEB_SDIO);
 396
 397         ret = request_firmware(&fw, card->helper, &card->func->dev);
 398         if (ret) {
 399                 lbs_pr_err("can't load helper firmware\n");
 400                 goto out;
 401         }
 402
 403         chunk_buffer = kzalloc(64, GFP_KERNEL);
 404         if (!chunk_buffer) {
 405                 ret = -ENOMEM;
 406                 goto release_fw;
 407         }
 408
 409         sdio_claim_host(card->func);
 410
 411         ret = sdio_set_block_size(card->func, 32);
 412         if (ret)
 413                 goto release;
 414
 415         firmware = fw->data;
 416         size = fw->size;
 417
 418         while (size) {
 419                 timeout = jiffies + HZ;
 420                 while (1) {
 421                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 422                         if (ret)
 423                                 goto release;
 424                         if ((status & IF_SDIO_IO_RDY) &&
 425                                         (status & IF_SDIO_DL_RDY))
 426                                 break;
 427                         if (time_after(jiffies, timeout)) {
 428                                 ret = -ETIMEDOUT;
 429                                 goto release;
 430                         }
 431                         mdelay(1);
 432                 }
 433
 434                 chunk_size = min(size, (size_t)60);
 435
 436                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 437                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 438 /*
 439                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 440 */
 441                 ret = sdio_writesb(card->func, card->ioport,
 442                                 chunk_buffer, 64);
 443                 if (ret)
 444                         goto release;
 445
 446                 firmware += chunk_size;
 447                 size -= chunk_size;
 448         }
 449
 450         /* an empty block marks the end of the transfer */
 451         memset(chunk_buffer, 0, 4);
 452         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 453         if (ret)
 454                 goto release;
 455
 456         lbs_deb_sdio("waiting for helper to boot...\n");
 457
 458         /* wait for the helper to boot by looking at the size register */
 459         timeout = jiffies + HZ;
 460         while (1) {
 461                 u16 req_size;
 462
 463                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 464                 if (ret)
 465                         goto release;
 466
 467                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 468                 if (ret)
 469                         goto release;
 470
 471                 if (req_size != 0)
 472                         break;
 473
 474                 if (time_after(jiffies, timeout)) {
 475                         ret = -ETIMEDOUT;
 476                         goto release;
 477                 }
 478
 479                 msleep(10);
 480         }
 481
 482         ret = 0;
 483
 484 release:
 485         sdio_set_block_size(card->func, 0);
 486         sdio_release_host(card->func);
 487         kfree(chunk_buffer);
 488 release_fw:
 489         release_firmware(fw);
 490
 491 out:
 492         if (ret)
 493                 lbs_pr_err("failed to load helper firmware\n");
 494
 495         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 496
 497         return ret;
 498 }
 499
 500 static int if_sdio_prog_real(struct if_sdio_card *card)
 501 {
 502         int ret;
 503         u8 status;
 504         const struct firmware *fw;
 505         unsigned long timeout;
 506         u8 *chunk_buffer;
 507         u32 chunk_size;
 508         const u8 *firmware;
 509         size_t size, req_size;
 510
 511         lbs_deb_enter(LBS_DEB_SDIO);
 512
 513         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 514         if (ret) {
 515                 lbs_pr_err("can't load firmware\n");
 516                 goto out;
 517         }
 518
 519         chunk_buffer = kzalloc(512, GFP_KERNEL);
 520         if (!chunk_buffer) {
 521                 ret = -ENOMEM;
 522                 goto release_fw;
 523         }
 524
 525         sdio_claim_host(card->func);
 526
 527         ret = sdio_set_block_size(card->func, 32);
 528         if (ret)
 529                 goto release;
 530
 531         firmware = fw->data;
 532         size = fw->size;
 533
 534         while (size) {
 535                 timeout = jiffies + HZ;
 536                 while (1) {
 537                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 538                         if (ret)
 539                                 goto release;
 540                         if ((status & IF_SDIO_IO_RDY) &&
 541                                         (status & IF_SDIO_DL_RDY))
 542                                 break;
 543                         if (time_after(jiffies, timeout)) {
 544                                 ret = -ETIMEDOUT;
 545                                 goto release;
 546                         }
 547                         mdelay(1);
 548                 }
 549
 550                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 551                 if (ret)
 552                         goto release;
 553
 554                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 555                 if (ret)
 556                         goto release;
 557 /*
 558                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 559 */
 560                 if (req_size == 0) {
 561                         lbs_deb_sdio("firmware helper gave up early\n");
 562                         ret = -EIO;
 563                         goto release;
 564                 }
 565
 566                 if (req_size & 0x01) {
 567                         lbs_deb_sdio("firmware helper signalled error\n");
 568                         ret = -EIO;
 569                         goto release;
 570                 }
 571
 572                 if (req_size > size)
 573                         req_size = size;
 574
 575                 while (req_size) {
 576                         chunk_size = min(req_size, (size_t)512);
 577
 578                         memcpy(chunk_buffer, firmware, chunk_size);
 579 /*
 580                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 581                                 chunk_size, (chunk_size + 31) / 32 * 32);
 582 */
 583                         ret = sdio_writesb(card->func, card->ioport,
 584                                 chunk_buffer, (chunk_size + 31) / 32 * 32);
 585                         if (ret)
 586                                 goto release;
 587
 588                         firmware += chunk_size;
 589                         size -= chunk_size;
 590                         req_size -= chunk_size;
 591                 }
 592         }
 593
 594         ret = 0;
 595
 596         lbs_deb_sdio("waiting for firmware to boot...\n");
 597
 598         /* wait for the firmware to boot */
 599         timeout = jiffies + HZ;
 600         while (1) {
 601                 u16 scratch;
 602
 603                 scratch = if_sdio_read_scratch(card, &ret);
 604                 if (ret)
 605                         goto release;
 606
 607                 if (scratch == IF_SDIO_FIRMWARE_OK)
 608                         break;
 609
 610                 if (time_after(jiffies, timeout)) {
 611                         ret = -ETIMEDOUT;
 612                         goto release;
 613                 }
 614
 615                 msleep(10);
 616         }
 617
 618         ret = 0;
 619
 620 release:
 621         sdio_set_block_size(card->func, 0);
 622         sdio_release_host(card->func);
 623         kfree(chunk_buffer);
 624 release_fw:
 625         release_firmware(fw);
 626
 627 out:
 628         if (ret)
 629                 lbs_pr_err("failed to load firmware\n");
 630
 631         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 632
 633         return ret;
 634 }
 635
 636 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 637 {
 638         int ret;
 639         u16 scratch;
 640
 641         lbs_deb_enter(LBS_DEB_SDIO);
 642
 643         sdio_claim_host(card->func);
 644         scratch = if_sdio_read_scratch(card, &ret);
 645         sdio_release_host(card->func);
 646
 647         if (ret)
 648                 goto out;
 649
 650         if (scratch == IF_SDIO_FIRMWARE_OK) {
 651                 lbs_deb_sdio("firmware already loaded\n");
 652                 goto success;
 653         }
 654
 655         ret = if_sdio_prog_helper(card);
 656         if (ret)
 657                 goto out;
 658
 659         ret = if_sdio_prog_real(card);
 660         if (ret)
 661                 goto out;
 662
 663 success:
 664         ret = 0;
 665
 666 out:
 667         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 668
 669         return ret;
 670 }
 671
 672 /*******************************************************************/
 673 /* Libertas callbacks                                              */
 674 /*******************************************************************/
 675
 676 static int if_sdio_host_to_card(struct lbs_private *priv,
 677                 u8 type, u8 *buf, u16 nb)
 678 {
 679         int ret;
 680         struct if_sdio_card *card;
 681         struct if_sdio_packet *packet, *cur;
 682         u16 size;
 683         unsigned long flags;
 684
 685         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 686
 687         card = priv->card;
 688
 689         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 690                 ret = -EINVAL;
 691                 goto out;
 692         }
 693
 694         /*
 695          * The transfer must be in one transaction or the firmware
 696          * goes suicidal. There's no way to guarantee that for all
 697          * controllers, but we can at least try.
 698          */
 699         size = sdio_align_size(card->func, nb + 4);
 700
 701         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 702                         GFP_ATOMIC);
 703         if (!packet) {
 704                 ret = -ENOMEM;
 705                 goto out;
 706         }
 707
 708         packet->next = NULL;
 709         packet->nb = size;
 710
 711         /*
 712          * SDIO specific header.
 713          */
 714         packet->buffer[0] = (nb + 4) & 0xff;
 715         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 716         packet->buffer[2] = type;
 717         packet->buffer[3] = 0;
 718
 719         memcpy(packet->buffer + 4, buf, nb);
 720
 721         spin_lock_irqsave(&card->lock, flags);
 722
 723         if (!card->packets)
 724                 card->packets = packet;
 725         else {
 726                 cur = card->packets;
 727                 while (cur->next)
 728                         cur = cur->next;
 729                 cur->next = packet;
 730         }
 731
 732         switch (type) {
 733         case MVMS_CMD:
 734                 priv->dnld_sent = DNLD_CMD_SENT;
 735                 break;
 736         case MVMS_DAT:
 737                 priv->dnld_sent = DNLD_DATA_SENT;
 738                 break;
 739         default:
 740                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 741         }
 742
 743         spin_unlock_irqrestore(&card->lock, flags);
 744
 745         schedule_work(&card->packet_worker);
 746
 747         ret = 0;
 748
 749 out:
 750         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 751
 752         return ret;
 753 }
 754
 755 /*******************************************************************/
 756 /* SDIO callbacks                                                  */
 757 /*******************************************************************/
 758
 759 static void if_sdio_interrupt(struct sdio_func *func)
 760 {
 761         int ret;
 762         struct if_sdio_card *card;
 763         u8 cause;
 764
 765         lbs_deb_enter(LBS_DEB_SDIO);
 766
 767         card = sdio_get_drvdata(func);
 768
 769         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 770         if (ret)
 771                 goto out;
 772
 773         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 774
 775         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 776         if (ret)
 777                 goto out;
 778
 779         /*
 780          * Ignore the define name, this really means the card has
 781          * successfully received the command.
 782          */
 783         if (cause & IF_SDIO_H_INT_DNLD)
 784                 lbs_host_to_card_done(card->priv);
 785
 786
 787         if (cause & IF_SDIO_H_INT_UPLD) {
 788                 ret = if_sdio_card_to_host(card);
 789                 if (ret)
 790                         goto out;
 791         }
 792
 793         ret = 0;
 794
 795 out:
 796         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 797 }
 798
 799 static int if_sdio_probe(struct sdio_func *func,
 800                 const struct sdio_device_id *id)
 801 {
 802         struct if_sdio_card *card;
 803         struct lbs_private *priv;
 804         int ret, i;
 805         unsigned int model;
 806         struct if_sdio_packet *packet;
 807
 808         lbs_deb_enter(LBS_DEB_SDIO);
 809
 810         for (i = 0;i < func->card->num_info;i++) {
 811                 if (sscanf(func->card->info[i],
 812                                 "802.11 SDIO ID: %x", &model) == 1)
 813                         break;
 814                 if (sscanf(func->card->info[i],
 815                                 "ID: %x", &model) == 1)
 816                         break;
 817                if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 818                        model = 4;
 819                        break;
 820                }
 821         }
 822
 823         if (i == func->card->num_info) {
 824                 lbs_pr_err("unable to identify card model\n");
 825                 return -ENODEV;
 826         }
 827
 828         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 829         if (!card)
 830                 return -ENOMEM;
 831
 832         card->func = func;
 833         card->model = model;
 834         spin_lock_init(&card->lock);
 835         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 836
 837         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 838                 if (card->model == if_sdio_models[i].model)
 839                         break;
 840         }
 841
 842         if (i == ARRAY_SIZE(if_sdio_models)) {
 843                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 844                 ret = -ENODEV;
 845                 goto free;
 846         }
 847
 848         card->helper = if_sdio_models[i].helper;
 849         card->firmware = if_sdio_models[i].firmware;
 850
 851         if (lbs_helper_name) {
 852                 lbs_deb_sdio("overriding helper firmware: %s\n",
 853                         lbs_helper_name);
 854                 card->helper = lbs_helper_name;
 855         }
 856
 857         if (lbs_fw_name) {
 858                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 859                 card->firmware = lbs_fw_name;
 860         }
 861
 862         sdio_claim_host(func);
 863
 864         ret = sdio_enable_func(func);
 865         if (ret)
 866                 goto release;
 867
 868         ret = sdio_claim_irq(func, if_sdio_interrupt);
 869         if (ret)
 870                 goto disable;
 871
 872         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 873         if (ret)
 874                 goto release_int;
 875
 876         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 877         if (ret)
 878                 goto release_int;
 879
 880         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 881         if (ret)
 882                 goto release_int;
 883
 884         sdio_release_host(func);
 885
 886         sdio_set_drvdata(func, card);
 887
 888         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 889                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 890                         func->class, func->vendor, func->device,
 891                         model, (unsigned)card->ioport);
 892
 893         ret = if_sdio_prog_firmware(card);
 894         if (ret)
 895                 goto reclaim;
 896
 897         priv = lbs_add_card(card, &func->dev);
 898         if (!priv) {
 899                 ret = -ENOMEM;
 900                 goto reclaim;
 901         }
 902
 903         card->priv = priv;
 904
 905         priv->card = card;
 906         priv->hw_host_to_card = if_sdio_host_to_card;
 907
 908         priv->fw_ready = 1;
 909
 910         /*
 911          * Enable interrupts now that everything is set up
 912          */
 913         sdio_claim_host(func);
 914         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 915         sdio_release_host(func);
 916         if (ret)
 917                 goto reclaim;
 918
 919         ret = lbs_start_card(priv);
 920         if (ret)
 921                 goto err_activate_card;
 922
 923 out:
 924         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 925
 926         return ret;
 927
 928 err_activate_card:
 929         flush_scheduled_work();
 930         free_netdev(priv->dev);
 931         kfree(priv);
 932 reclaim:
 933         sdio_claim_host(func);
 934 release_int:
 935         sdio_release_irq(func);
 936 disable:
 937         sdio_disable_func(func);
 938 release:
 939         sdio_release_host(func);
 940 free:
 941         while (card->packets) {
 942                 packet = card->packets;
 943                 card->packets = card->packets->next;
 944                 kfree(packet);
 945         }
 946
 947         kfree(card);
 948
 949         goto out;
 950 }
 951
 952 static void if_sdio_remove(struct sdio_func *func)
 953 {
 954         struct if_sdio_card *card;
 955         struct if_sdio_packet *packet;
 956
 957         lbs_deb_enter(LBS_DEB_SDIO);
 958
 959         card = sdio_get_drvdata(func);
 960
 961         card->priv->surpriseremoved = 1;
 962
 963         lbs_deb_sdio("call remove card\n");
 964         lbs_stop_card(card->priv);
 965         lbs_remove_card(card->priv);
 966
 967         flush_scheduled_work();
 968
 969         sdio_claim_host(func);
 970         sdio_release_irq(func);
 971         sdio_disable_func(func);
 972         sdio_release_host(func);
 973
 974         while (card->packets) {
 975                 packet = card->packets;
 976                 card->packets = card->packets->next;
 977                 kfree(packet);
 978         }
 979
 980         kfree(card);
 981
 982         lbs_deb_leave(LBS_DEB_SDIO);
 983 }
 984
 985 static struct sdio_driver if_sdio_driver = {
 986         .name           = "libertas_sdio",
 987         .id_table       = if_sdio_ids,
 988         .probe          = if_sdio_probe,
 989         .remove         = if_sdio_remove,
 990 };
 991
 992 /*******************************************************************/
 993 /* Module functions                                                */
 994 /*******************************************************************/
 995
 996 static int __init if_sdio_init_module(void)
 997 {
 998         int ret = 0;
 999
1000         lbs_deb_enter(LBS_DEB_SDIO);
1001
1002         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1003         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1004
1005         ret = sdio_register_driver(&if_sdio_driver);
1006
1007         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1008
1009         return ret;
1010 }
1011
1012 static void __exit if_sdio_exit_module(void)
1013 {
1014         lbs_deb_enter(LBS_DEB_SDIO);
1015
1016         sdio_unregister_driver(&if_sdio_driver);
1017
1018         lbs_deb_leave(LBS_DEB_SDIO);
1019 }
1020
1021 module_init(if_sdio_init_module);
1022 module_exit(if_sdio_exit_module);
1023
1024 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1025 MODULE_AUTHOR("Pierre Ossman");
1026 MODULE_LICENSE("GPL");