git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/libertas/if_sdio.c

   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 *libertas_helper_name = NULL;
  44 module_param_named(helper_name, libertas_helper_name, charp, 0644);
  45
  46 static char *libertas_fw_name = NULL;
  47 module_param_named(fw_name, libertas_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         wlan_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         u8                      int_cause;
  95         u32                     event;
  96
  97         spinlock_t              lock;
  98         struct if_sdio_packet   *packets;
  99         struct work_struct      packet_worker;
 100 };
 101
 102 /********************************************************************/
 103 /* I/O                                                              */
 104 /********************************************************************/
 105
 106 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 107 {
 108         int ret, reg;
 109         u16 scratch;
 110
 111         if (card->model == 0x04)
 112                 reg = IF_SDIO_SCRATCH_OLD;
 113         else
 114                 reg = IF_SDIO_SCRATCH;
 115
 116         scratch = sdio_readb(card->func, reg, &ret);
 117         if (!ret)
 118                 scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
 119
 120         if (err)
 121                 *err = ret;
 122
 123         if (ret)
 124                 return 0xffff;
 125
 126         return scratch;
 127 }
 128
 129 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 130                 u8 *buffer, unsigned size)
 131 {
 132         int ret;
 133         unsigned long flags;
 134
 135         lbs_deb_enter(LBS_DEB_SDIO);
 136
 137         spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
 138
 139         if (!card->priv->adapter->cur_cmd) {
 140                 lbs_deb_sdio("discarding spurious response\n");
 141                 ret = 0;
 142                 goto out;
 143         }
 144
 145         if (size > MRVDRV_SIZE_OF_CMD_BUFFER) {
 146                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 147                         (int)size);
 148                 ret = -E2BIG;
 149                 goto out;
 150         }
 151
 152         memcpy(card->priv->adapter->cur_cmd->bufvirtualaddr, buffer, size);
 153         card->priv->upld_len = size;
 154
 155         card->int_cause |= MRVDRV_CMD_UPLD_RDY;
 156
 157         libertas_interrupt(card->priv->dev);
 158
 159         ret = 0;
 160
 161 out:
 162         spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
 163
 164         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 165
 166         return ret;
 167 }
 168
 169 static int if_sdio_handle_data(struct if_sdio_card *card,
 170                 u8 *buffer, unsigned size)
 171 {
 172         int ret;
 173         struct sk_buff *skb;
 174         char *data;
 175
 176         lbs_deb_enter(LBS_DEB_SDIO);
 177
 178         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 179                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 180                         (int)size);
 181                 ret = -E2BIG;
 182                 goto out;
 183         }
 184
 185         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
 186         if (!skb) {
 187                 ret = -ENOMEM;
 188                 goto out;
 189         }
 190
 191         data = skb_put(skb, size);
 192
 193         memcpy(data, buffer, size);
 194
 195         libertas_process_rxed_packet(card->priv, skb);
 196
 197         ret = 0;
 198
 199 out:
 200         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 201
 202         return ret;
 203 }
 204
 205 static int if_sdio_handle_event(struct if_sdio_card *card,
 206                 u8 *buffer, unsigned size)
 207 {
 208         int ret;
 209         unsigned long flags;
 210         u32 event;
 211
 212         lbs_deb_enter(LBS_DEB_SDIO);
 213
 214         if (card->model == 0x04) {
 215                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 216                 if (ret)
 217                         goto out;
 218         } else {
 219                 if (size < 4) {
 220                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 221                                 (int)size);
 222                         ret = -EINVAL;
 223                         goto out;
 224                 }
 225                 event = buffer[3] << 24;
 226                 event |= buffer[2] << 16;
 227                 event |= buffer[1] << 8;
 228                 event |= buffer[0] << 0;
 229                 event <<= SBI_EVENT_CAUSE_SHIFT;
 230         }
 231
 232         spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
 233
 234         card->event = event;
 235         card->int_cause |= MRVDRV_CARDEVENT;
 236
 237         libertas_interrupt(card->priv->dev);
 238
 239         spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
 240
 241         ret = 0;
 242
 243 out:
 244         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 245
 246         return ret;
 247 }
 248
 249 static int if_sdio_card_to_host(struct if_sdio_card *card)
 250 {
 251         int ret;
 252         u8 status;
 253         u16 size, type, chunk;
 254         unsigned long timeout;
 255
 256         lbs_deb_enter(LBS_DEB_SDIO);
 257
 258         size = if_sdio_read_scratch(card, &ret);
 259         if (ret)
 260                 goto out;
 261
 262         if (size < 4) {
 263                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 264                         (int)size);
 265                 ret = -EINVAL;
 266                 goto out;
 267         }
 268
 269         timeout = jiffies + HZ;
 270         while (1) {
 271                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 272                 if (ret)
 273                         goto out;
 274                 if (status & IF_SDIO_IO_RDY)
 275                         break;
 276                 if (time_after(jiffies, timeout)) {
 277                         ret = -ETIMEDOUT;
 278                         goto out;
 279                 }
 280                 mdelay(1);
 281         }
 282
 283         /*
 284          * The transfer must be in one transaction or the firmware
 285          * goes suicidal.
 286          */
 287         chunk = size;
 288         if ((chunk > card->func->cur_blksize) || (chunk > 512)) {
 289                 chunk = (chunk + card->func->cur_blksize - 1) /
 290                         card->func->cur_blksize * card->func->cur_blksize;
 291         }
 292
 293         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 294         if (ret)
 295                 goto out;
 296
 297         chunk = card->buffer[0] | (card->buffer[1] << 8);
 298         type = card->buffer[2] | (card->buffer[3] << 8);
 299
 300         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 301                 (int)type, (int)chunk);
 302
 303         if (chunk > size) {
 304                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 305                         (int)chunk, (int)size);
 306                 ret = -EINVAL;
 307                 goto out;
 308         }
 309
 310         if (chunk < size) {
 311                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 312                         (int)chunk, (int)size);
 313         }
 314
 315         switch (type) {
 316         case MVMS_CMD:
 317                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 318                 if (ret)
 319                         goto out;
 320                 break;
 321         case MVMS_DAT:
 322                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 323                 if (ret)
 324                         goto out;
 325                 break;
 326         case MVMS_EVENT:
 327                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 328                 if (ret)
 329                         goto out;
 330                 break;
 331         default:
 332                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 333                                 (int)type);
 334                 ret = -EINVAL;
 335                 goto out;
 336         }
 337
 338 out:
 339         if (ret)
 340                 lbs_pr_err("problem fetching packet from firmware\n");
 341
 342         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 343
 344         return ret;
 345 }
 346
 347 static void if_sdio_host_to_card_worker(struct work_struct *work)
 348 {
 349         struct if_sdio_card *card;
 350         struct if_sdio_packet *packet;
 351         unsigned long timeout;
 352         u8 status;
 353         int ret;
 354         unsigned long flags;
 355
 356         lbs_deb_enter(LBS_DEB_SDIO);
 357
 358         card = container_of(work, struct if_sdio_card, packet_worker);
 359
 360         while (1) {
 361                 spin_lock_irqsave(&card->lock, flags);
 362                 packet = card->packets;
 363                 if (packet)
 364                         card->packets = packet->next;
 365                 spin_unlock_irqrestore(&card->lock, flags);
 366
 367                 if (!packet)
 368                         break;
 369
 370                 sdio_claim_host(card->func);
 371
 372                 timeout = jiffies + HZ;
 373                 while (1) {
 374                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 375                         if (ret)
 376                                 goto release;
 377                         if (status & IF_SDIO_IO_RDY)
 378                                 break;
 379                         if (time_after(jiffies, timeout)) {
 380                                 ret = -ETIMEDOUT;
 381                                 goto release;
 382                         }
 383                         mdelay(1);
 384                 }
 385
 386                 ret = sdio_writesb(card->func, card->ioport,
 387                                 packet->buffer, packet->nb);
 388                 if (ret)
 389                         goto release;
 390 release:
 391                 sdio_release_host(card->func);
 392
 393                 kfree(packet);
 394         }
 395
 396         lbs_deb_leave(LBS_DEB_SDIO);
 397 }
 398
 399 /********************************************************************/
 400 /* Firmware                                                         */
 401 /********************************************************************/
 402
 403 static int if_sdio_prog_helper(struct if_sdio_card *card)
 404 {
 405         int ret;
 406         u8 status;
 407         const struct firmware *fw;
 408         unsigned long timeout;
 409         u8 *chunk_buffer;
 410         u32 chunk_size;
 411         u8 *firmware;
 412         size_t size;
 413
 414         lbs_deb_enter(LBS_DEB_SDIO);
 415
 416         ret = request_firmware(&fw, card->helper, &card->func->dev);
 417         if (ret) {
 418                 lbs_pr_err("can't load helper firmware\n");
 419                 goto out;
 420         }
 421
 422         chunk_buffer = kzalloc(64, GFP_KERNEL);
 423         if (!chunk_buffer) {
 424                 ret = -ENOMEM;
 425                 goto release_fw;
 426         }
 427
 428         sdio_claim_host(card->func);
 429
 430         ret = sdio_set_block_size(card->func, 32);
 431         if (ret)
 432                 goto release;
 433
 434         firmware = fw->data;
 435         size = fw->size;
 436
 437         while (size) {
 438                 timeout = jiffies + HZ;
 439                 while (1) {
 440                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 441                         if (ret)
 442                                 goto release;
 443                         if ((status & IF_SDIO_IO_RDY) &&
 444                                         (status & IF_SDIO_DL_RDY))
 445                                 break;
 446                         if (time_after(jiffies, timeout)) {
 447                                 ret = -ETIMEDOUT;
 448                                 goto release;
 449                         }
 450                         mdelay(1);
 451                 }
 452
 453                 chunk_size = min(size, (size_t)60);
 454
 455                 *((u32*)chunk_buffer) = cpu_to_le32(chunk_size);
 456                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 457 /*
 458                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 459 */
 460                 ret = sdio_writesb(card->func, card->ioport,
 461                                 chunk_buffer, 64);
 462                 if (ret)
 463                         goto release;
 464
 465                 firmware += chunk_size;
 466                 size -= chunk_size;
 467         }
 468
 469         /* an empty block marks the end of the transfer */
 470         memset(chunk_buffer, 0, 4);
 471         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 472         if (ret)
 473                 goto release;
 474
 475         lbs_deb_sdio("waiting for helper to boot...\n");
 476
 477         /* wait for the helper to boot by looking at the size register */
 478         timeout = jiffies + HZ;
 479         while (1) {
 480                 u16 req_size;
 481
 482                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 483                 if (ret)
 484                         goto release;
 485
 486                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 487                 if (ret)
 488                         goto release;
 489
 490                 if (req_size != 0)
 491                         break;
 492
 493                 if (time_after(jiffies, timeout)) {
 494                         ret = -ETIMEDOUT;
 495                         goto release;
 496                 }
 497
 498                 msleep(10);
 499         }
 500
 501         ret = 0;
 502
 503 release:
 504         sdio_set_block_size(card->func, 0);
 505         sdio_release_host(card->func);
 506         kfree(chunk_buffer);
 507 release_fw:
 508         release_firmware(fw);
 509
 510 out:
 511         if (ret)
 512                 lbs_pr_err("failed to load helper firmware\n");
 513
 514         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 515
 516         return ret;
 517 }
 518
 519 static int if_sdio_prog_real(struct if_sdio_card *card)
 520 {
 521         int ret;
 522         u8 status;
 523         const struct firmware *fw;
 524         unsigned long timeout;
 525         u8 *chunk_buffer;
 526         u32 chunk_size;
 527         u8 *firmware;
 528         size_t size, req_size;
 529
 530         lbs_deb_enter(LBS_DEB_SDIO);
 531
 532         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 533         if (ret) {
 534                 lbs_pr_err("can't load firmware\n");
 535                 goto out;
 536         }
 537
 538         chunk_buffer = kzalloc(512, GFP_KERNEL);
 539         if (!chunk_buffer) {
 540                 ret = -ENOMEM;
 541                 goto release_fw;
 542         }
 543
 544         sdio_claim_host(card->func);
 545
 546         ret = sdio_set_block_size(card->func, 32);
 547         if (ret)
 548                 goto release;
 549
 550         firmware = fw->data;
 551         size = fw->size;
 552
 553         while (size) {
 554                 timeout = jiffies + HZ;
 555                 while (1) {
 556                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 557                         if (ret)
 558                                 goto release;
 559                         if ((status & IF_SDIO_IO_RDY) &&
 560                                         (status & IF_SDIO_DL_RDY))
 561                                 break;
 562                         if (time_after(jiffies, timeout)) {
 563                                 ret = -ETIMEDOUT;
 564                                 goto release;
 565                         }
 566                         mdelay(1);
 567                 }
 568
 569                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 570                 if (ret)
 571                         goto release;
 572
 573                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 574                 if (ret)
 575                         goto release;
 576 /*
 577                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 578 */
 579                 if (req_size == 0) {
 580                         lbs_deb_sdio("firmware helper gave up early\n");
 581                         ret = -EIO;
 582                         goto release;
 583                 }
 584
 585                 if (req_size & 0x01) {
 586                         lbs_deb_sdio("firmware helper signalled error\n");
 587                         ret = -EIO;
 588                         goto release;
 589                 }
 590
 591                 if (req_size > size)
 592                         req_size = size;
 593
 594                 while (req_size) {
 595                         chunk_size = min(req_size, (size_t)512);
 596
 597                         memcpy(chunk_buffer, firmware, chunk_size);
 598 /*
 599                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 600                                 chunk_size, (chunk_size + 31) / 32 * 32);
 601 */
 602                         ret = sdio_writesb(card->func, card->ioport,
 603                                 chunk_buffer, (chunk_size + 31) / 32 * 32);
 604                         if (ret)
 605                                 goto release;
 606
 607                         firmware += chunk_size;
 608                         size -= chunk_size;
 609                         req_size -= chunk_size;
 610                 }
 611         }
 612
 613         ret = 0;
 614
 615         lbs_deb_sdio("waiting for firmware to boot...\n");
 616
 617         /* wait for the firmware to boot */
 618         timeout = jiffies + HZ;
 619         while (1) {
 620                 u16 scratch;
 621
 622                 scratch = if_sdio_read_scratch(card, &ret);
 623                 if (ret)
 624                         goto release;
 625
 626                 if (scratch == IF_SDIO_FIRMWARE_OK)
 627                         break;
 628
 629                 if (time_after(jiffies, timeout)) {
 630                         ret = -ETIMEDOUT;
 631                         goto release;
 632                 }
 633
 634                 msleep(10);
 635         }
 636
 637         ret = 0;
 638
 639 release:
 640         sdio_set_block_size(card->func, 0);
 641         sdio_release_host(card->func);
 642         kfree(chunk_buffer);
 643 release_fw:
 644         release_firmware(fw);
 645
 646 out:
 647         if (ret)
 648                 lbs_pr_err("failed to load firmware\n");
 649
 650         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 651
 652         return ret;
 653 }
 654
 655 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 656 {
 657         int ret;
 658         u16 scratch;
 659
 660         lbs_deb_enter(LBS_DEB_SDIO);
 661
 662         sdio_claim_host(card->func);
 663         scratch = if_sdio_read_scratch(card, &ret);
 664         sdio_release_host(card->func);
 665
 666         if (ret)
 667                 goto out;
 668
 669         if (scratch == IF_SDIO_FIRMWARE_OK) {
 670                 lbs_deb_sdio("firmware already loaded\n");
 671                 goto success;
 672         }
 673
 674         ret = if_sdio_prog_helper(card);
 675         if (ret)
 676                 goto out;
 677
 678         ret = if_sdio_prog_real(card);
 679         if (ret)
 680                 goto out;
 681
 682 success:
 683         ret = 0;
 684
 685 out:
 686         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 687
 688         return ret;
 689 }
 690
 691 /*******************************************************************/
 692 /* Libertas callbacks                                              */
 693 /*******************************************************************/
 694
 695 static int if_sdio_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
 696 {
 697         int ret;
 698         struct if_sdio_card *card;
 699         struct if_sdio_packet *packet, *cur;
 700         u16 size;
 701         unsigned long flags;
 702
 703         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 704
 705         card = priv->card;
 706
 707         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 708                 ret = -EINVAL;
 709                 goto out;
 710         }
 711
 712         /*
 713          * The transfer must be in one transaction or the firmware
 714          * goes suicidal.
 715          */
 716         size = nb + 4;
 717         if ((size > card->func->cur_blksize) || (size > 512)) {
 718                 size = (size + card->func->cur_blksize - 1) /
 719                         card->func->cur_blksize * card->func->cur_blksize;
 720         }
 721
 722         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 723                         GFP_ATOMIC);
 724         if (!packet) {
 725                 ret = -ENOMEM;
 726                 goto out;
 727         }
 728
 729         packet->next = NULL;
 730         packet->nb = size;
 731
 732         /*
 733          * SDIO specific header.
 734          */
 735         packet->buffer[0] = (nb + 4) & 0xff;
 736         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 737         packet->buffer[2] = type;
 738         packet->buffer[3] = 0;
 739
 740         memcpy(packet->buffer + 4, buf, nb);
 741
 742         spin_lock_irqsave(&card->lock, flags);
 743
 744         if (!card->packets)
 745                 card->packets = packet;
 746         else {
 747                 cur = card->packets;
 748                 while (cur->next)
 749                         cur = cur->next;
 750                 cur->next = packet;
 751         }
 752
 753         switch (type) {
 754         case MVMS_CMD:
 755                 priv->dnld_sent = DNLD_CMD_SENT;
 756                 break;
 757         case MVMS_DAT:
 758                 priv->dnld_sent = DNLD_DATA_SENT;
 759                 break;
 760         default:
 761                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 762         }
 763
 764         spin_unlock_irqrestore(&card->lock, flags);
 765
 766         schedule_work(&card->packet_worker);
 767
 768         ret = 0;
 769
 770 out:
 771         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 772
 773         return ret;
 774 }
 775
 776 static int if_sdio_get_int_status(wlan_private *priv, u8 *ireg)
 777 {
 778         struct if_sdio_card *card;
 779
 780         lbs_deb_enter(LBS_DEB_SDIO);
 781
 782         card = priv->card;
 783
 784         *ireg = card->int_cause;
 785         card->int_cause = 0;
 786
 787         lbs_deb_leave(LBS_DEB_SDIO);
 788
 789         return 0;
 790 }
 791
 792 static int if_sdio_read_event_cause(wlan_private *priv)
 793 {
 794         struct if_sdio_card *card;
 795
 796         lbs_deb_enter(LBS_DEB_SDIO);
 797
 798         card = priv->card;
 799
 800         priv->adapter->eventcause = card->event;
 801
 802         lbs_deb_leave(LBS_DEB_SDIO);
 803
 804         return 0;
 805 }
 806
 807 /*******************************************************************/
 808 /* SDIO callbacks                                                  */
 809 /*******************************************************************/
 810
 811 static void if_sdio_interrupt(struct sdio_func *func)
 812 {
 813         int ret;
 814         struct if_sdio_card *card;
 815         u8 cause;
 816
 817         lbs_deb_enter(LBS_DEB_SDIO);
 818
 819         card = sdio_get_drvdata(func);
 820
 821         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 822         if (ret)
 823                 goto out;
 824
 825         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 826
 827         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 828         if (ret)
 829                 goto out;
 830
 831         /*
 832          * Ignore the define name, this really means the card has
 833          * successfully received the command.
 834          */
 835         if (cause & IF_SDIO_H_INT_DNLD) {
 836                 if ((card->priv->dnld_sent == DNLD_DATA_SENT) &&
 837                         (card->priv->adapter->connect_status == LIBERTAS_CONNECTED))
 838                         netif_wake_queue(card->priv->dev);
 839                 card->priv->dnld_sent = DNLD_RES_RECEIVED;
 840         }
 841
 842         if (cause & IF_SDIO_H_INT_UPLD) {
 843                 ret = if_sdio_card_to_host(card);
 844                 if (ret)
 845                         goto out;
 846         }
 847
 848         ret = 0;
 849
 850 out:
 851         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 852 }
 853
 854 static int if_sdio_probe(struct sdio_func *func,
 855                 const struct sdio_device_id *id)
 856 {
 857         struct if_sdio_card *card;
 858         wlan_private *priv;
 859         int ret, i;
 860         unsigned int model;
 861         struct if_sdio_packet *packet;
 862
 863         lbs_deb_enter(LBS_DEB_SDIO);
 864
 865         for (i = 0;i < func->card->num_info;i++) {
 866                 if (sscanf(func->card->info[i],
 867                                 "802.11 SDIO ID: %x", &model) == 1)
 868                         break;
 869                 if (sscanf(func->card->info[i],
 870                                 "ID: %x", &model) == 1)
 871                         break;
 872         }
 873
 874         if (i == func->card->num_info) {
 875                 lbs_pr_err("unable to identify card model\n");
 876                 return -ENODEV;
 877         }
 878
 879         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 880         if (!card)
 881                 return -ENOMEM;
 882
 883         card->func = func;
 884         card->model = model;
 885         spin_lock_init(&card->lock);
 886         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 887
 888         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 889                 if (card->model == if_sdio_models[i].model)
 890                         break;
 891         }
 892
 893         if (i == ARRAY_SIZE(if_sdio_models)) {
 894                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 895                 ret = -ENODEV;
 896                 goto free;
 897         }
 898
 899         card->helper = if_sdio_models[i].helper;
 900         card->firmware = if_sdio_models[i].firmware;
 901
 902         if (libertas_helper_name) {
 903                 lbs_deb_sdio("overriding helper firmware: %s\n",
 904                         libertas_helper_name);
 905                 card->helper = libertas_helper_name;
 906         }
 907
 908         if (libertas_fw_name) {
 909                 lbs_deb_sdio("overriding firmware: %s\n", libertas_fw_name);
 910                 card->firmware = libertas_fw_name;
 911         }
 912
 913         sdio_claim_host(func);
 914
 915         ret = sdio_enable_func(func);
 916         if (ret)
 917                 goto release;
 918
 919         ret = sdio_claim_irq(func, if_sdio_interrupt);
 920         if (ret)
 921                 goto disable;
 922
 923         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 924         if (ret)
 925                 goto release_int;
 926
 927         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 928         if (ret)
 929                 goto release_int;
 930
 931         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 932         if (ret)
 933                 goto release_int;
 934
 935         sdio_release_host(func);
 936
 937         sdio_set_drvdata(func, card);
 938
 939         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 940                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 941                         func->class, func->vendor, func->device,
 942                         model, (unsigned)card->ioport);
 943
 944         ret = if_sdio_prog_firmware(card);
 945         if (ret)
 946                 goto reclaim;
 947
 948         priv = libertas_add_card(card, &func->dev);
 949         if (!priv) {
 950                 ret = -ENOMEM;
 951                 goto reclaim;
 952         }
 953
 954         card->priv = priv;
 955
 956         priv->card = card;
 957         priv->hw_host_to_card = if_sdio_host_to_card;
 958         priv->hw_get_int_status = if_sdio_get_int_status;
 959         priv->hw_read_event_cause = if_sdio_read_event_cause;
 960
 961         priv->adapter->fw_ready = 1;
 962
 963         /*
 964          * Enable interrupts now that everything is set up
 965          */
 966         sdio_claim_host(func);
 967         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 968         sdio_release_host(func);
 969         if (ret)
 970                 goto reclaim;
 971
 972         ret = libertas_start_card(priv);
 973         if (ret)
 974                 goto err_activate_card;
 975
 976 out:
 977         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 978
 979         return ret;
 980
 981 err_activate_card:
 982         flush_scheduled_work();
 983         free_netdev(priv->dev);
 984         kfree(priv->adapter);
 985 reclaim:
 986         sdio_claim_host(func);
 987 release_int:
 988         sdio_release_irq(func);
 989 disable:
 990         sdio_disable_func(func);
 991 release:
 992         sdio_release_host(func);
 993 free:
 994         while (card->packets) {
 995                 packet = card->packets;
 996                 card->packets = card->packets->next;
 997                 kfree(packet);
 998         }
 999
1000         kfree(card);
1001
1002         goto out;
1003 }
1004
1005 static void if_sdio_remove(struct sdio_func *func)
1006 {
1007         struct if_sdio_card *card;
1008         struct if_sdio_packet *packet;
1009
1010         lbs_deb_enter(LBS_DEB_SDIO);
1011
1012         card = sdio_get_drvdata(func);
1013
1014         card->priv->adapter->surpriseremoved = 1;
1015
1016         lbs_deb_sdio("call remove card\n");
1017         libertas_stop_card(card->priv);
1018         libertas_remove_card(card->priv);
1019
1020         flush_scheduled_work();
1021
1022         sdio_claim_host(func);
1023         sdio_release_irq(func);
1024         sdio_disable_func(func);
1025         sdio_release_host(func);
1026
1027         while (card->packets) {
1028                 packet = card->packets;
1029                 card->packets = card->packets->next;
1030                 kfree(packet);
1031         }
1032
1033         kfree(card);
1034
1035         lbs_deb_leave(LBS_DEB_SDIO);
1036 }
1037
1038 static struct sdio_driver if_sdio_driver = {
1039         .name           = "libertas_sdio",
1040         .id_table       = if_sdio_ids,
1041         .probe          = if_sdio_probe,
1042         .remove         = if_sdio_remove,
1043 };
1044
1045 /*******************************************************************/
1046 /* Module functions                                                */
1047 /*******************************************************************/
1048
1049 static int if_sdio_init_module(void)
1050 {
1051         int ret = 0;
1052
1053         lbs_deb_enter(LBS_DEB_SDIO);
1054
1055         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1056         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1057
1058         ret = sdio_register_driver(&if_sdio_driver);
1059
1060         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1061
1062         return ret;
1063 }
1064
1065 static void if_sdio_exit_module(void)
1066 {
1067         lbs_deb_enter(LBS_DEB_SDIO);
1068
1069         sdio_unregister_driver(&if_sdio_driver);
1070
1071         lbs_deb_leave(LBS_DEB_SDIO);
1072 }
1073
1074 module_init(if_sdio_init_module);
1075 module_exit(if_sdio_exit_module);
1076
1077 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1078 MODULE_AUTHOR("Pierre Ossman");
1079 MODULE_LICENSE("GPL");