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
  99         struct workqueue_struct *workqueue;
 100         struct work_struct      packet_worker;
 101 };
 102
 103 /********************************************************************/
 104 /* I/O                                                              */
 105 /********************************************************************/
 106
 107 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 108 {
 109         int ret, reg;
 110         u16 scratch;
 111
 112         if (card->model == 0x04)
 113                 reg = IF_SDIO_SCRATCH_OLD;
 114         else
 115                 reg = IF_SDIO_SCRATCH;
 116
 117         scratch = sdio_readb(card->func, reg, &ret);
 118         if (!ret)
 119                 scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
 120
 121         if (err)
 122                 *err = ret;
 123
 124         if (ret)
 125                 return 0xffff;
 126
 127         return scratch;
 128 }
 129
 130 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 131                 u8 *buffer, unsigned size)
 132 {
 133         struct lbs_private *priv = card->priv;
 134         int ret;
 135         unsigned long flags;
 136         u8 i;
 137
 138         lbs_deb_enter(LBS_DEB_SDIO);
 139
 140         if (size > LBS_CMD_BUFFER_SIZE) {
 141                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 142                         (int)size);
 143                 ret = -E2BIG;
 144                 goto out;
 145         }
 146
 147         spin_lock_irqsave(&priv->driver_lock, flags);
 148
 149         i = (priv->resp_idx == 0) ? 1 : 0;
 150         BUG_ON(priv->resp_len[i]);
 151         priv->resp_len[i] = size;
 152         memcpy(priv->resp_buf[i], buffer, size);
 153         lbs_notify_command_response(priv, i);
 154
 155         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 156
 157         ret = 0;
 158
 159 out:
 160         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 161         return ret;
 162 }
 163
 164 static int if_sdio_handle_data(struct if_sdio_card *card,
 165                 u8 *buffer, unsigned size)
 166 {
 167         int ret;
 168         struct sk_buff *skb;
 169         char *data;
 170
 171         lbs_deb_enter(LBS_DEB_SDIO);
 172
 173         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 174                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 175                         (int)size);
 176                 ret = -E2BIG;
 177                 goto out;
 178         }
 179
 180         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 181         if (!skb) {
 182                 ret = -ENOMEM;
 183                 goto out;
 184         }
 185
 186         skb_reserve(skb, NET_IP_ALIGN);
 187
 188         data = skb_put(skb, size);
 189
 190         memcpy(data, buffer, size);
 191
 192         lbs_process_rxed_packet(card->priv, skb);
 193
 194         ret = 0;
 195
 196 out:
 197         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 198
 199         return ret;
 200 }
 201
 202 static int if_sdio_handle_event(struct if_sdio_card *card,
 203                 u8 *buffer, unsigned size)
 204 {
 205         int ret;
 206         u32 event;
 207
 208         lbs_deb_enter(LBS_DEB_SDIO);
 209
 210         if (card->model == 0x04) {
 211                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 212                 if (ret)
 213                         goto out;
 214
 215                 /* right shift 3 bits to get the event id */
 216                 event >>= 3;
 217         } else {
 218                 if (size < 4) {
 219                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 220                                 (int)size);
 221                         ret = -EINVAL;
 222                         goto out;
 223                 }
 224                 event = buffer[3] << 24;
 225                 event |= buffer[2] << 16;
 226                 event |= buffer[1] << 8;
 227                 event |= buffer[0] << 0;
 228         }
 229
 230         lbs_queue_event(card->priv, event & 0xFF);
 231         ret = 0;
 232
 233 out:
 234         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 235
 236         return ret;
 237 }
 238
 239 static int if_sdio_card_to_host(struct if_sdio_card *card)
 240 {
 241         int ret;
 242         u8 status;
 243         u16 size, type, chunk;
 244         unsigned long timeout;
 245
 246         lbs_deb_enter(LBS_DEB_SDIO);
 247
 248         size = if_sdio_read_scratch(card, &ret);
 249         if (ret)
 250                 goto out;
 251
 252         if (size < 4) {
 253                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 254                         (int)size);
 255                 ret = -EINVAL;
 256                 goto out;
 257         }
 258
 259         timeout = jiffies + HZ;
 260         while (1) {
 261                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 262                 if (ret)
 263                         goto out;
 264                 if (status & IF_SDIO_IO_RDY)
 265                         break;
 266                 if (time_after(jiffies, timeout)) {
 267                         ret = -ETIMEDOUT;
 268                         goto out;
 269                 }
 270                 mdelay(1);
 271         }
 272
 273         /*
 274          * The transfer must be in one transaction or the firmware
 275          * goes suicidal. There's no way to guarantee that for all
 276          * controllers, but we can at least try.
 277          */
 278         chunk = sdio_align_size(card->func, size);
 279
 280         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 281         if (ret)
 282                 goto out;
 283
 284         chunk = card->buffer[0] | (card->buffer[1] << 8);
 285         type = card->buffer[2] | (card->buffer[3] << 8);
 286
 287         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 288                 (int)type, (int)chunk);
 289
 290         if (chunk > size) {
 291                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 292                         (int)chunk, (int)size);
 293                 ret = -EINVAL;
 294                 goto out;
 295         }
 296
 297         if (chunk < size) {
 298                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 299                         (int)chunk, (int)size);
 300         }
 301
 302         switch (type) {
 303         case MVMS_CMD:
 304                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 305                 if (ret)
 306                         goto out;
 307                 break;
 308         case MVMS_DAT:
 309                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 310                 if (ret)
 311                         goto out;
 312                 break;
 313         case MVMS_EVENT:
 314                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 315                 if (ret)
 316                         goto out;
 317                 break;
 318         default:
 319                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 320                                 (int)type);
 321                 ret = -EINVAL;
 322                 goto out;
 323         }
 324
 325 out:
 326         if (ret)
 327                 lbs_pr_err("problem fetching packet from firmware\n");
 328
 329         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 330
 331         return ret;
 332 }
 333
 334 static void if_sdio_host_to_card_worker(struct work_struct *work)
 335 {
 336         struct if_sdio_card *card;
 337         struct if_sdio_packet *packet;
 338         unsigned long timeout;
 339         u8 status;
 340         int ret;
 341         unsigned long flags;
 342
 343         lbs_deb_enter(LBS_DEB_SDIO);
 344
 345         card = container_of(work, struct if_sdio_card, packet_worker);
 346
 347         while (1) {
 348                 spin_lock_irqsave(&card->lock, flags);
 349                 packet = card->packets;
 350                 if (packet)
 351                         card->packets = packet->next;
 352                 spin_unlock_irqrestore(&card->lock, flags);
 353
 354                 if (!packet)
 355                         break;
 356
 357                 sdio_claim_host(card->func);
 358
 359                 timeout = jiffies + HZ;
 360                 while (1) {
 361                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 362                         if (ret)
 363                                 goto release;
 364                         if (status & IF_SDIO_IO_RDY)
 365                                 break;
 366                         if (time_after(jiffies, timeout)) {
 367                                 ret = -ETIMEDOUT;
 368                                 goto release;
 369                         }
 370                         mdelay(1);
 371                 }
 372
 373                 ret = sdio_writesb(card->func, card->ioport,
 374                                 packet->buffer, packet->nb);
 375                 if (ret)
 376                         goto release;
 377 release:
 378                 sdio_release_host(card->func);
 379
 380                 kfree(packet);
 381         }
 382
 383         lbs_deb_leave(LBS_DEB_SDIO);
 384 }
 385
 386 /********************************************************************/
 387 /* Firmware                                                         */
 388 /********************************************************************/
 389
 390 static int if_sdio_prog_helper(struct if_sdio_card *card)
 391 {
 392         int ret;
 393         u8 status;
 394         const struct firmware *fw;
 395         unsigned long timeout;
 396         u8 *chunk_buffer;
 397         u32 chunk_size;
 398         const u8 *firmware;
 399         size_t size;
 400
 401         lbs_deb_enter(LBS_DEB_SDIO);
 402
 403         ret = request_firmware(&fw, card->helper, &card->func->dev);
 404         if (ret) {
 405                 lbs_pr_err("can't load helper firmware\n");
 406                 goto out;
 407         }
 408
 409         chunk_buffer = kzalloc(64, GFP_KERNEL);
 410         if (!chunk_buffer) {
 411                 ret = -ENOMEM;
 412                 goto release_fw;
 413         }
 414
 415         sdio_claim_host(card->func);
 416
 417         ret = sdio_set_block_size(card->func, 32);
 418         if (ret)
 419                 goto release;
 420
 421         firmware = fw->data;
 422         size = fw->size;
 423
 424         while (size) {
 425                 timeout = jiffies + HZ;
 426                 while (1) {
 427                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 428                         if (ret)
 429                                 goto release;
 430                         if ((status & IF_SDIO_IO_RDY) &&
 431                                         (status & IF_SDIO_DL_RDY))
 432                                 break;
 433                         if (time_after(jiffies, timeout)) {
 434                                 ret = -ETIMEDOUT;
 435                                 goto release;
 436                         }
 437                         mdelay(1);
 438                 }
 439
 440                 chunk_size = min(size, (size_t)60);
 441
 442                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 443                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 444 /*
 445                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 446 */
 447                 ret = sdio_writesb(card->func, card->ioport,
 448                                 chunk_buffer, 64);
 449                 if (ret)
 450                         goto release;
 451
 452                 firmware += chunk_size;
 453                 size -= chunk_size;
 454         }
 455
 456         /* an empty block marks the end of the transfer */
 457         memset(chunk_buffer, 0, 4);
 458         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 459         if (ret)
 460                 goto release;
 461
 462         lbs_deb_sdio("waiting for helper to boot...\n");
 463
 464         /* wait for the helper to boot by looking at the size register */
 465         timeout = jiffies + HZ;
 466         while (1) {
 467                 u16 req_size;
 468
 469                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 470                 if (ret)
 471                         goto release;
 472
 473                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 474                 if (ret)
 475                         goto release;
 476
 477                 if (req_size != 0)
 478                         break;
 479
 480                 if (time_after(jiffies, timeout)) {
 481                         ret = -ETIMEDOUT;
 482                         goto release;
 483                 }
 484
 485                 msleep(10);
 486         }
 487
 488         ret = 0;
 489
 490 release:
 491         sdio_set_block_size(card->func, 0);
 492         sdio_release_host(card->func);
 493         kfree(chunk_buffer);
 494 release_fw:
 495         release_firmware(fw);
 496
 497 out:
 498         if (ret)
 499                 lbs_pr_err("failed to load helper firmware\n");
 500
 501         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 502
 503         return ret;
 504 }
 505
 506 static int if_sdio_prog_real(struct if_sdio_card *card)
 507 {
 508         int ret;
 509         u8 status;
 510         const struct firmware *fw;
 511         unsigned long timeout;
 512         u8 *chunk_buffer;
 513         u32 chunk_size;
 514         const u8 *firmware;
 515         size_t size, req_size;
 516
 517         lbs_deb_enter(LBS_DEB_SDIO);
 518
 519         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 520         if (ret) {
 521                 lbs_pr_err("can't load firmware\n");
 522                 goto out;
 523         }
 524
 525         chunk_buffer = kzalloc(512, GFP_KERNEL);
 526         if (!chunk_buffer) {
 527                 ret = -ENOMEM;
 528                 goto release_fw;
 529         }
 530
 531         sdio_claim_host(card->func);
 532
 533         ret = sdio_set_block_size(card->func, 32);
 534         if (ret)
 535                 goto release;
 536
 537         firmware = fw->data;
 538         size = fw->size;
 539
 540         while (size) {
 541                 timeout = jiffies + HZ;
 542                 while (1) {
 543                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 544                         if (ret)
 545                                 goto release;
 546                         if ((status & IF_SDIO_IO_RDY) &&
 547                                         (status & IF_SDIO_DL_RDY))
 548                                 break;
 549                         if (time_after(jiffies, timeout)) {
 550                                 ret = -ETIMEDOUT;
 551                                 goto release;
 552                         }
 553                         mdelay(1);
 554                 }
 555
 556                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 557                 if (ret)
 558                         goto release;
 559
 560                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 561                 if (ret)
 562                         goto release;
 563 /*
 564                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 565 */
 566                 if (req_size == 0) {
 567                         lbs_deb_sdio("firmware helper gave up early\n");
 568                         ret = -EIO;
 569                         goto release;
 570                 }
 571
 572                 if (req_size & 0x01) {
 573                         lbs_deb_sdio("firmware helper signalled error\n");
 574                         ret = -EIO;
 575                         goto release;
 576                 }
 577
 578                 if (req_size > size)
 579                         req_size = size;
 580
 581                 while (req_size) {
 582                         chunk_size = min(req_size, (size_t)512);
 583
 584                         memcpy(chunk_buffer, firmware, chunk_size);
 585 /*
 586                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 587                                 chunk_size, (chunk_size + 31) / 32 * 32);
 588 */
 589                         ret = sdio_writesb(card->func, card->ioport,
 590                                 chunk_buffer, roundup(chunk_size, 32));
 591                         if (ret)
 592                                 goto release;
 593
 594                         firmware += chunk_size;
 595                         size -= chunk_size;
 596                         req_size -= chunk_size;
 597                 }
 598         }
 599
 600         ret = 0;
 601
 602         lbs_deb_sdio("waiting for firmware to boot...\n");
 603
 604         /* wait for the firmware to boot */
 605         timeout = jiffies + HZ;
 606         while (1) {
 607                 u16 scratch;
 608
 609                 scratch = if_sdio_read_scratch(card, &ret);
 610                 if (ret)
 611                         goto release;
 612
 613                 if (scratch == IF_SDIO_FIRMWARE_OK)
 614                         break;
 615
 616                 if (time_after(jiffies, timeout)) {
 617                         ret = -ETIMEDOUT;
 618                         goto release;
 619                 }
 620
 621                 msleep(10);
 622         }
 623
 624         ret = 0;
 625
 626 release:
 627         sdio_set_block_size(card->func, 0);
 628         sdio_release_host(card->func);
 629         kfree(chunk_buffer);
 630 release_fw:
 631         release_firmware(fw);
 632
 633 out:
 634         if (ret)
 635                 lbs_pr_err("failed to load firmware\n");
 636
 637         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 638
 639         return ret;
 640 }
 641
 642 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 643 {
 644         int ret;
 645         u16 scratch;
 646
 647         lbs_deb_enter(LBS_DEB_SDIO);
 648
 649         sdio_claim_host(card->func);
 650         scratch = if_sdio_read_scratch(card, &ret);
 651         sdio_release_host(card->func);
 652
 653         if (ret)
 654                 goto out;
 655
 656         if (scratch == IF_SDIO_FIRMWARE_OK) {
 657                 lbs_deb_sdio("firmware already loaded\n");
 658                 goto success;
 659         }
 660
 661         ret = if_sdio_prog_helper(card);
 662         if (ret)
 663                 goto out;
 664
 665         ret = if_sdio_prog_real(card);
 666         if (ret)
 667                 goto out;
 668
 669 success:
 670         ret = 0;
 671
 672 out:
 673         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 674
 675         return ret;
 676 }
 677
 678 /*******************************************************************/
 679 /* Libertas callbacks                                              */
 680 /*******************************************************************/
 681
 682 static int if_sdio_host_to_card(struct lbs_private *priv,
 683                 u8 type, u8 *buf, u16 nb)
 684 {
 685         int ret;
 686         struct if_sdio_card *card;
 687         struct if_sdio_packet *packet, *cur;
 688         u16 size;
 689         unsigned long flags;
 690
 691         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 692
 693         card = priv->card;
 694
 695         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 696                 ret = -EINVAL;
 697                 goto out;
 698         }
 699
 700         /*
 701          * The transfer must be in one transaction or the firmware
 702          * goes suicidal. There's no way to guarantee that for all
 703          * controllers, but we can at least try.
 704          */
 705         size = sdio_align_size(card->func, nb + 4);
 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         queue_work(card->workqueue, &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         card->workqueue = create_workqueue("libertas_sdio");
 842         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 843
 844         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 845                 if (card->model == if_sdio_models[i].model)
 846                         break;
 847         }
 848
 849         if (i == ARRAY_SIZE(if_sdio_models)) {
 850                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 851                 ret = -ENODEV;
 852                 goto free;
 853         }
 854
 855         card->helper = if_sdio_models[i].helper;
 856         card->firmware = if_sdio_models[i].firmware;
 857
 858         if (lbs_helper_name) {
 859                 lbs_deb_sdio("overriding helper firmware: %s\n",
 860                         lbs_helper_name);
 861                 card->helper = lbs_helper_name;
 862         }
 863
 864         if (lbs_fw_name) {
 865                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 866                 card->firmware = lbs_fw_name;
 867         }
 868
 869         sdio_claim_host(func);
 870
 871         ret = sdio_enable_func(func);
 872         if (ret)
 873                 goto release;
 874
 875         ret = sdio_claim_irq(func, if_sdio_interrupt);
 876         if (ret)
 877                 goto disable;
 878
 879         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 880         if (ret)
 881                 goto release_int;
 882
 883         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 884         if (ret)
 885                 goto release_int;
 886
 887         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 888         if (ret)
 889                 goto release_int;
 890
 891         sdio_release_host(func);
 892
 893         sdio_set_drvdata(func, card);
 894
 895         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 896                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 897                         func->class, func->vendor, func->device,
 898                         model, (unsigned)card->ioport);
 899
 900         ret = if_sdio_prog_firmware(card);
 901         if (ret)
 902                 goto reclaim;
 903
 904         priv = lbs_add_card(card, &func->dev);
 905         if (!priv) {
 906                 ret = -ENOMEM;
 907                 goto reclaim;
 908         }
 909
 910         card->priv = priv;
 911
 912         priv->card = card;
 913         priv->hw_host_to_card = if_sdio_host_to_card;
 914
 915         priv->fw_ready = 1;
 916
 917         /*
 918          * Enable interrupts now that everything is set up
 919          */
 920         sdio_claim_host(func);
 921         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 922         sdio_release_host(func);
 923         if (ret)
 924                 goto reclaim;
 925
 926         ret = lbs_start_card(priv);
 927         if (ret)
 928                 goto err_activate_card;
 929
 930         if (priv->fwcapinfo & FW_CAPINFO_PS)
 931                 priv->ps_supported = 1;
 932
 933 out:
 934         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 935
 936         return ret;
 937
 938 err_activate_card:
 939         flush_workqueue(card->workqueue);
 940         lbs_remove_card(priv);
 941 reclaim:
 942         sdio_claim_host(func);
 943 release_int:
 944         sdio_release_irq(func);
 945 disable:
 946         sdio_disable_func(func);
 947 release:
 948         sdio_release_host(func);
 949 free:
 950         destroy_workqueue(card->workqueue);
 951         while (card->packets) {
 952                 packet = card->packets;
 953                 card->packets = card->packets->next;
 954                 kfree(packet);
 955         }
 956
 957         kfree(card);
 958
 959         goto out;
 960 }
 961
 962 static void if_sdio_remove(struct sdio_func *func)
 963 {
 964         struct if_sdio_card *card;
 965         struct if_sdio_packet *packet;
 966
 967         lbs_deb_enter(LBS_DEB_SDIO);
 968
 969         card = sdio_get_drvdata(func);
 970
 971         card->priv->surpriseremoved = 1;
 972
 973         lbs_deb_sdio("call remove card\n");
 974         lbs_stop_card(card->priv);
 975         lbs_remove_card(card->priv);
 976
 977         flush_workqueue(card->workqueue);
 978         destroy_workqueue(card->workqueue);
 979
 980         sdio_claim_host(func);
 981         sdio_release_irq(func);
 982         sdio_disable_func(func);
 983         sdio_release_host(func);
 984
 985         while (card->packets) {
 986                 packet = card->packets;
 987                 card->packets = card->packets->next;
 988                 kfree(packet);
 989         }
 990
 991         kfree(card);
 992
 993         lbs_deb_leave(LBS_DEB_SDIO);
 994 }
 995
 996 static struct sdio_driver if_sdio_driver = {
 997         .name           = "libertas_sdio",
 998         .id_table       = if_sdio_ids,
 999         .probe          = if_sdio_probe,
1000         .remove         = if_sdio_remove,
1001 };
1002
1003 /*******************************************************************/
1004 /* Module functions                                                */
1005 /*******************************************************************/
1006
1007 static int __init if_sdio_init_module(void)
1008 {
1009         int ret = 0;
1010
1011         lbs_deb_enter(LBS_DEB_SDIO);
1012
1013         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1014         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1015
1016         ret = sdio_register_driver(&if_sdio_driver);
1017
1018         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1019
1020         return ret;
1021 }
1022
1023 static void __exit if_sdio_exit_module(void)
1024 {
1025         lbs_deb_enter(LBS_DEB_SDIO);
1026
1027         sdio_unregister_driver(&if_sdio_driver);
1028
1029         lbs_deb_leave(LBS_DEB_SDIO);
1030 }
1031
1032 module_init(if_sdio_init_module);
1033 module_exit(if_sdio_exit_module);
1034
1035 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1036 MODULE_AUTHOR("Pierre Ossman");
1037 MODULE_LICENSE("GPL");