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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/kernel.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/firmware.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/delay.h>
  34 #include <linux/mmc/card.h>
  35 #include <linux/mmc/sdio_func.h>
  36 #include <linux/mmc/sdio_ids.h>
  37
  38 #include "host.h"
  39 #include "decl.h"
  40 #include "defs.h"
  41 #include "dev.h"
  42 #include "if_sdio.h"
  43
  44 static char *lbs_helper_name = NULL;
  45 module_param_named(helper_name, lbs_helper_name, charp, 0644);
  46
  47 static char *lbs_fw_name = NULL;
  48 module_param_named(fw_name, lbs_fw_name, charp, 0644);
  49
  50 static const struct sdio_device_id if_sdio_ids[] = {
  51         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
  52         { /* end: all zeroes */                                         },
  53 };
  54
  55 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
  56
  57 struct if_sdio_model {
  58         int model;
  59         const char *helper;
  60         const char *firmware;
  61 };
  62
  63 static struct if_sdio_model if_sdio_models[] = {
  64         {
  65                 /* 8385 */
  66                 .model = 0x04,
  67                 .helper = "sd8385_helper.bin",
  68                 .firmware = "sd8385.bin",
  69         },
  70         {
  71                 /* 8686 */
  72                 .model = 0x0B,
  73                 .helper = "sd8686_helper.bin",
  74                 .firmware = "sd8686.bin",
  75         },
  76 };
  77
  78 struct if_sdio_packet {
  79         struct if_sdio_packet   *next;
  80         u16                     nb;
  81         u8                      buffer[0] __attribute__((aligned(4)));
  82 };
  83
  84 struct if_sdio_card {
  85         struct sdio_func        *func;
  86         struct lbs_private      *priv;
  87
  88         int                     model;
  89         unsigned long           ioport;
  90
  91         const char              *helper;
  92         const char              *firmware;
  93
  94         u8                      buffer[65536];
  95
  96         spinlock_t              lock;
  97         struct if_sdio_packet   *packets;
  98         struct work_struct      packet_worker;
  99 };
 100
 101 /********************************************************************/
 102 /* I/O                                                              */
 103 /********************************************************************/
 104
 105 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 106 {
 107         int ret, reg;
 108         u16 scratch;
 109
 110         if (card->model == 0x04)
 111                 reg = IF_SDIO_SCRATCH_OLD;
 112         else
 113                 reg = IF_SDIO_SCRATCH;
 114
 115         scratch = sdio_readb(card->func, reg, &ret);
 116         if (!ret)
 117                 scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
 118
 119         if (err)
 120                 *err = ret;
 121
 122         if (ret)
 123                 return 0xffff;
 124
 125         return scratch;
 126 }
 127
 128 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 129                 u8 *buffer, unsigned size)
 130 {
 131         struct lbs_private *priv = card->priv;
 132         int ret;
 133         unsigned long flags;
 134         u8 i;
 135
 136         lbs_deb_enter(LBS_DEB_SDIO);
 137
 138         if (size > LBS_CMD_BUFFER_SIZE) {
 139                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 140                         (int)size);
 141                 ret = -E2BIG;
 142                 goto out;
 143         }
 144
 145         spin_lock_irqsave(&priv->driver_lock, flags);
 146
 147         i = (priv->resp_idx == 0) ? 1 : 0;
 148         BUG_ON(priv->resp_len[i]);
 149         priv->resp_len[i] = size;
 150         memcpy(priv->resp_buf[i], buffer, size);
 151         lbs_notify_command_response(priv, i);
 152
 153         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 154
 155         ret = 0;
 156
 157 out:
 158         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 159         return ret;
 160 }
 161
 162 static int if_sdio_handle_data(struct if_sdio_card *card,
 163                 u8 *buffer, unsigned size)
 164 {
 165         int ret;
 166         struct sk_buff *skb;
 167         char *data;
 168
 169         lbs_deb_enter(LBS_DEB_SDIO);
 170
 171         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 172                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 173                         (int)size);
 174                 ret = -E2BIG;
 175                 goto out;
 176         }
 177
 178         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 179         if (!skb) {
 180                 ret = -ENOMEM;
 181                 goto out;
 182         }
 183
 184         skb_reserve(skb, NET_IP_ALIGN);
 185
 186         data = skb_put(skb, size);
 187
 188         memcpy(data, buffer, size);
 189
 190         lbs_process_rxed_packet(card->priv, skb);
 191
 192         ret = 0;
 193
 194 out:
 195         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 196
 197         return ret;
 198 }
 199
 200 static int if_sdio_handle_event(struct if_sdio_card *card,
 201                 u8 *buffer, unsigned size)
 202 {
 203         int ret;
 204         u32 event;
 205
 206         lbs_deb_enter(LBS_DEB_SDIO);
 207
 208         if (card->model == 0x04) {
 209                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 210                 if (ret)
 211                         goto out;
 212
 213                 /* right shift 3 bits to get the event id */
 214                 event >>= 3;
 215         } else {
 216                 if (size < 4) {
 217                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 218                                 (int)size);
 219                         ret = -EINVAL;
 220                         goto out;
 221                 }
 222                 event = buffer[3] << 24;
 223                 event |= buffer[2] << 16;
 224                 event |= buffer[1] << 8;
 225                 event |= buffer[0] << 0;
 226         }
 227
 228         lbs_queue_event(card->priv, event & 0xFF);
 229         ret = 0;
 230
 231 out:
 232         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 233
 234         return ret;
 235 }
 236
 237 static int if_sdio_card_to_host(struct if_sdio_card *card)
 238 {
 239         int ret;
 240         u8 status;
 241         u16 size, type, chunk;
 242         unsigned long timeout;
 243
 244         lbs_deb_enter(LBS_DEB_SDIO);
 245
 246         size = if_sdio_read_scratch(card, &ret);
 247         if (ret)
 248                 goto out;
 249
 250         if (size < 4) {
 251                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 252                         (int)size);
 253                 ret = -EINVAL;
 254                 goto out;
 255         }
 256
 257         timeout = jiffies + HZ;
 258         while (1) {
 259                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 260                 if (ret)
 261                         goto out;
 262                 if (status & IF_SDIO_IO_RDY)
 263                         break;
 264                 if (time_after(jiffies, timeout)) {
 265                         ret = -ETIMEDOUT;
 266                         goto out;
 267                 }
 268                 mdelay(1);
 269         }
 270
 271         /*
 272          * The transfer must be in one transaction or the firmware
 273          * goes suicidal. There's no way to guarantee that for all
 274          * controllers, but we can at least try.
 275          */
 276         chunk = sdio_align_size(card->func, size);
 277
 278         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 279         if (ret)
 280                 goto out;
 281
 282         chunk = card->buffer[0] | (card->buffer[1] << 8);
 283         type = card->buffer[2] | (card->buffer[3] << 8);
 284
 285         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 286                 (int)type, (int)chunk);
 287
 288         if (chunk > size) {
 289                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 290                         (int)chunk, (int)size);
 291                 ret = -EINVAL;
 292                 goto out;
 293         }
 294
 295         if (chunk < size) {
 296                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 297                         (int)chunk, (int)size);
 298         }
 299
 300         switch (type) {
 301         case MVMS_CMD:
 302                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 303                 if (ret)
 304                         goto out;
 305                 break;
 306         case MVMS_DAT:
 307                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 308                 if (ret)
 309                         goto out;
 310                 break;
 311         case MVMS_EVENT:
 312                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 313                 if (ret)
 314                         goto out;
 315                 break;
 316         default:
 317                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 318                                 (int)type);
 319                 ret = -EINVAL;
 320                 goto out;
 321         }
 322
 323 out:
 324         if (ret)
 325                 lbs_pr_err("problem fetching packet from firmware\n");
 326
 327         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 328
 329         return ret;
 330 }
 331
 332 static void if_sdio_host_to_card_worker(struct work_struct *work)
 333 {
 334         struct if_sdio_card *card;
 335         struct if_sdio_packet *packet;
 336         unsigned long timeout;
 337         u8 status;
 338         int ret;
 339         unsigned long flags;
 340
 341         lbs_deb_enter(LBS_DEB_SDIO);
 342
 343         card = container_of(work, struct if_sdio_card, packet_worker);
 344
 345         while (1) {
 346                 spin_lock_irqsave(&card->lock, flags);
 347                 packet = card->packets;
 348                 if (packet)
 349                         card->packets = packet->next;
 350                 spin_unlock_irqrestore(&card->lock, flags);
 351
 352                 if (!packet)
 353                         break;
 354
 355                 sdio_claim_host(card->func);
 356
 357                 timeout = jiffies + HZ;
 358                 while (1) {
 359                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 360                         if (ret)
 361                                 goto release;
 362                         if (status & IF_SDIO_IO_RDY)
 363                                 break;
 364                         if (time_after(jiffies, timeout)) {
 365                                 ret = -ETIMEDOUT;
 366                                 goto release;
 367                         }
 368                         mdelay(1);
 369                 }
 370
 371                 ret = sdio_writesb(card->func, card->ioport,
 372                                 packet->buffer, packet->nb);
 373                 if (ret)
 374                         goto release;
 375 release:
 376                 sdio_release_host(card->func);
 377
 378                 kfree(packet);
 379         }
 380
 381         lbs_deb_leave(LBS_DEB_SDIO);
 382 }
 383
 384 /********************************************************************/
 385 /* Firmware                                                         */
 386 /********************************************************************/
 387
 388 static int if_sdio_prog_helper(struct if_sdio_card *card)
 389 {
 390         int ret;
 391         u8 status;
 392         const struct firmware *fw;
 393         unsigned long timeout;
 394         u8 *chunk_buffer;
 395         u32 chunk_size;
 396         const u8 *firmware;
 397         size_t size;
 398
 399         lbs_deb_enter(LBS_DEB_SDIO);
 400
 401         ret = request_firmware(&fw, card->helper, &card->func->dev);
 402         if (ret) {
 403                 lbs_pr_err("can't load helper firmware\n");
 404                 goto out;
 405         }
 406
 407         chunk_buffer = kzalloc(64, GFP_KERNEL);
 408         if (!chunk_buffer) {
 409                 ret = -ENOMEM;
 410                 goto release_fw;
 411         }
 412
 413         sdio_claim_host(card->func);
 414
 415         ret = sdio_set_block_size(card->func, 32);
 416         if (ret)
 417                 goto release;
 418
 419         firmware = fw->data;
 420         size = fw->size;
 421
 422         while (size) {
 423                 timeout = jiffies + HZ;
 424                 while (1) {
 425                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 426                         if (ret)
 427                                 goto release;
 428                         if ((status & IF_SDIO_IO_RDY) &&
 429                                         (status & IF_SDIO_DL_RDY))
 430                                 break;
 431                         if (time_after(jiffies, timeout)) {
 432                                 ret = -ETIMEDOUT;
 433                                 goto release;
 434                         }
 435                         mdelay(1);
 436                 }
 437
 438                 chunk_size = min(size, (size_t)60);
 439
 440                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 441                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 442 /*
 443                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 444 */
 445                 ret = sdio_writesb(card->func, card->ioport,
 446                                 chunk_buffer, 64);
 447                 if (ret)
 448                         goto release;
 449
 450                 firmware += chunk_size;
 451                 size -= chunk_size;
 452         }
 453
 454         /* an empty block marks the end of the transfer */
 455         memset(chunk_buffer, 0, 4);
 456         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 457         if (ret)
 458                 goto release;
 459
 460         lbs_deb_sdio("waiting for helper to boot...\n");
 461
 462         /* wait for the helper to boot by looking at the size register */
 463         timeout = jiffies + HZ;
 464         while (1) {
 465                 u16 req_size;
 466
 467                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 468                 if (ret)
 469                         goto release;
 470
 471                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 472                 if (ret)
 473                         goto release;
 474
 475                 if (req_size != 0)
 476                         break;
 477
 478                 if (time_after(jiffies, timeout)) {
 479                         ret = -ETIMEDOUT;
 480                         goto release;
 481                 }
 482
 483                 msleep(10);
 484         }
 485
 486         ret = 0;
 487
 488 release:
 489         sdio_set_block_size(card->func, 0);
 490         sdio_release_host(card->func);
 491         kfree(chunk_buffer);
 492 release_fw:
 493         release_firmware(fw);
 494
 495 out:
 496         if (ret)
 497                 lbs_pr_err("failed to load helper firmware\n");
 498
 499         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 500
 501         return ret;
 502 }
 503
 504 static int if_sdio_prog_real(struct if_sdio_card *card)
 505 {
 506         int ret;
 507         u8 status;
 508         const struct firmware *fw;
 509         unsigned long timeout;
 510         u8 *chunk_buffer;
 511         u32 chunk_size;
 512         const u8 *firmware;
 513         size_t size, req_size;
 514
 515         lbs_deb_enter(LBS_DEB_SDIO);
 516
 517         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 518         if (ret) {
 519                 lbs_pr_err("can't load firmware\n");
 520                 goto out;
 521         }
 522
 523         chunk_buffer = kzalloc(512, GFP_KERNEL);
 524         if (!chunk_buffer) {
 525                 ret = -ENOMEM;
 526                 goto release_fw;
 527         }
 528
 529         sdio_claim_host(card->func);
 530
 531         ret = sdio_set_block_size(card->func, 32);
 532         if (ret)
 533                 goto release;
 534
 535         firmware = fw->data;
 536         size = fw->size;
 537
 538         while (size) {
 539                 timeout = jiffies + HZ;
 540                 while (1) {
 541                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 542                         if (ret)
 543                                 goto release;
 544                         if ((status & IF_SDIO_IO_RDY) &&
 545                                         (status & IF_SDIO_DL_RDY))
 546                                 break;
 547                         if (time_after(jiffies, timeout)) {
 548                                 ret = -ETIMEDOUT;
 549                                 goto release;
 550                         }
 551                         mdelay(1);
 552                 }
 553
 554                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 555                 if (ret)
 556                         goto release;
 557
 558                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 559                 if (ret)
 560                         goto release;
 561 /*
 562                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 563 */
 564                 if (req_size == 0) {
 565                         lbs_deb_sdio("firmware helper gave up early\n");
 566                         ret = -EIO;
 567                         goto release;
 568                 }
 569
 570                 if (req_size & 0x01) {
 571                         lbs_deb_sdio("firmware helper signalled error\n");
 572                         ret = -EIO;
 573                         goto release;
 574                 }
 575
 576                 if (req_size > size)
 577                         req_size = size;
 578
 579                 while (req_size) {
 580                         chunk_size = min(req_size, (size_t)512);
 581
 582                         memcpy(chunk_buffer, firmware, chunk_size);
 583 /*
 584                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 585                                 chunk_size, (chunk_size + 31) / 32 * 32);
 586 */
 587                         ret = sdio_writesb(card->func, card->ioport,
 588                                 chunk_buffer, roundup(chunk_size, 32));
 589                         if (ret)
 590                                 goto release;
 591
 592                         firmware += chunk_size;
 593                         size -= chunk_size;
 594                         req_size -= chunk_size;
 595                 }
 596         }
 597
 598         ret = 0;
 599
 600         lbs_deb_sdio("waiting for firmware to boot...\n");
 601
 602         /* wait for the firmware to boot */
 603         timeout = jiffies + HZ;
 604         while (1) {
 605                 u16 scratch;
 606
 607                 scratch = if_sdio_read_scratch(card, &ret);
 608                 if (ret)
 609                         goto release;
 610
 611                 if (scratch == IF_SDIO_FIRMWARE_OK)
 612                         break;
 613
 614                 if (time_after(jiffies, timeout)) {
 615                         ret = -ETIMEDOUT;
 616                         goto release;
 617                 }
 618
 619                 msleep(10);
 620         }
 621
 622         ret = 0;
 623
 624 release:
 625         sdio_set_block_size(card->func, 0);
 626         sdio_release_host(card->func);
 627         kfree(chunk_buffer);
 628 release_fw:
 629         release_firmware(fw);
 630
 631 out:
 632         if (ret)
 633                 lbs_pr_err("failed to load firmware\n");
 634
 635         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 636
 637         return ret;
 638 }
 639
 640 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 641 {
 642         int ret;
 643         u16 scratch;
 644
 645         lbs_deb_enter(LBS_DEB_SDIO);
 646
 647         sdio_claim_host(card->func);
 648         scratch = if_sdio_read_scratch(card, &ret);
 649         sdio_release_host(card->func);
 650
 651         if (ret)
 652                 goto out;
 653
 654         if (scratch == IF_SDIO_FIRMWARE_OK) {
 655                 lbs_deb_sdio("firmware already loaded\n");
 656                 goto success;
 657         }
 658
 659         ret = if_sdio_prog_helper(card);
 660         if (ret)
 661                 goto out;
 662
 663         ret = if_sdio_prog_real(card);
 664         if (ret)
 665                 goto out;
 666
 667 success:
 668         ret = 0;
 669
 670 out:
 671         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 672
 673         return ret;
 674 }
 675
 676 /*******************************************************************/
 677 /* Libertas callbacks                                              */
 678 /*******************************************************************/
 679
 680 static int if_sdio_host_to_card(struct lbs_private *priv,
 681                 u8 type, u8 *buf, u16 nb)
 682 {
 683         int ret;
 684         struct if_sdio_card *card;
 685         struct if_sdio_packet *packet, *cur;
 686         u16 size;
 687         unsigned long flags;
 688
 689         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 690
 691         card = priv->card;
 692
 693         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 694                 ret = -EINVAL;
 695                 goto out;
 696         }
 697
 698         /*
 699          * The transfer must be in one transaction or the firmware
 700          * goes suicidal. There's no way to guarantee that for all
 701          * controllers, but we can at least try.
 702          */
 703         size = sdio_align_size(card->func, nb + 4);
 704
 705         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 706                         GFP_ATOMIC);
 707         if (!packet) {
 708                 ret = -ENOMEM;
 709                 goto out;
 710         }
 711
 712         packet->next = NULL;
 713         packet->nb = size;
 714
 715         /*
 716          * SDIO specific header.
 717          */
 718         packet->buffer[0] = (nb + 4) & 0xff;
 719         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 720         packet->buffer[2] = type;
 721         packet->buffer[3] = 0;
 722
 723         memcpy(packet->buffer + 4, buf, nb);
 724
 725         spin_lock_irqsave(&card->lock, flags);
 726
 727         if (!card->packets)
 728                 card->packets = packet;
 729         else {
 730                 cur = card->packets;
 731                 while (cur->next)
 732                         cur = cur->next;
 733                 cur->next = packet;
 734         }
 735
 736         switch (type) {
 737         case MVMS_CMD:
 738                 priv->dnld_sent = DNLD_CMD_SENT;
 739                 break;
 740         case MVMS_DAT:
 741                 priv->dnld_sent = DNLD_DATA_SENT;
 742                 break;
 743         default:
 744                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 745         }
 746
 747         spin_unlock_irqrestore(&card->lock, flags);
 748
 749         schedule_work(&card->packet_worker);
 750
 751         ret = 0;
 752
 753 out:
 754         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 755
 756         return ret;
 757 }
 758
 759 /*******************************************************************/
 760 /* SDIO callbacks                                                  */
 761 /*******************************************************************/
 762
 763 static void if_sdio_interrupt(struct sdio_func *func)
 764 {
 765         int ret;
 766         struct if_sdio_card *card;
 767         u8 cause;
 768
 769         lbs_deb_enter(LBS_DEB_SDIO);
 770
 771         card = sdio_get_drvdata(func);
 772
 773         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 774         if (ret)
 775                 goto out;
 776
 777         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 778
 779         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 780         if (ret)
 781                 goto out;
 782
 783         /*
 784          * Ignore the define name, this really means the card has
 785          * successfully received the command.
 786          */
 787         if (cause & IF_SDIO_H_INT_DNLD)
 788                 lbs_host_to_card_done(card->priv);
 789
 790
 791         if (cause & IF_SDIO_H_INT_UPLD) {
 792                 ret = if_sdio_card_to_host(card);
 793                 if (ret)
 794                         goto out;
 795         }
 796
 797         ret = 0;
 798
 799 out:
 800         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 801 }
 802
 803 static int if_sdio_probe(struct sdio_func *func,
 804                 const struct sdio_device_id *id)
 805 {
 806         struct if_sdio_card *card;
 807         struct lbs_private *priv;
 808         int ret, i;
 809         unsigned int model;
 810         struct if_sdio_packet *packet;
 811
 812         lbs_deb_enter(LBS_DEB_SDIO);
 813
 814         for (i = 0;i < func->card->num_info;i++) {
 815                 if (sscanf(func->card->info[i],
 816                                 "802.11 SDIO ID: %x", &model) == 1)
 817                         break;
 818                 if (sscanf(func->card->info[i],
 819                                 "ID: %x", &model) == 1)
 820                         break;
 821                if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 822                        model = 4;
 823                        break;
 824                }
 825         }
 826
 827         if (i == func->card->num_info) {
 828                 lbs_pr_err("unable to identify card model\n");
 829                 return -ENODEV;
 830         }
 831
 832         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 833         if (!card)
 834                 return -ENOMEM;
 835
 836         card->func = func;
 837         card->model = model;
 838         spin_lock_init(&card->lock);
 839         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 840
 841         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 842                 if (card->model == if_sdio_models[i].model)
 843                         break;
 844         }
 845
 846         if (i == ARRAY_SIZE(if_sdio_models)) {
 847                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 848                 ret = -ENODEV;
 849                 goto free;
 850         }
 851
 852         card->helper = if_sdio_models[i].helper;
 853         card->firmware = if_sdio_models[i].firmware;
 854
 855         if (lbs_helper_name) {
 856                 lbs_deb_sdio("overriding helper firmware: %s\n",
 857                         lbs_helper_name);
 858                 card->helper = lbs_helper_name;
 859         }
 860
 861         if (lbs_fw_name) {
 862                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 863                 card->firmware = lbs_fw_name;
 864         }
 865
 866         sdio_claim_host(func);
 867
 868         ret = sdio_enable_func(func);
 869         if (ret)
 870                 goto release;
 871
 872         ret = sdio_claim_irq(func, if_sdio_interrupt);
 873         if (ret)
 874                 goto disable;
 875
 876         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 877         if (ret)
 878                 goto release_int;
 879
 880         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 881         if (ret)
 882                 goto release_int;
 883
 884         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 885         if (ret)
 886                 goto release_int;
 887
 888         sdio_release_host(func);
 889
 890         sdio_set_drvdata(func, card);
 891
 892         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 893                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 894                         func->class, func->vendor, func->device,
 895                         model, (unsigned)card->ioport);
 896
 897         ret = if_sdio_prog_firmware(card);
 898         if (ret)
 899                 goto reclaim;
 900
 901         priv = lbs_add_card(card, &func->dev);
 902         if (!priv) {
 903                 ret = -ENOMEM;
 904                 goto reclaim;
 905         }
 906
 907         card->priv = priv;
 908
 909         priv->card = card;
 910         priv->hw_host_to_card = if_sdio_host_to_card;
 911
 912         priv->fw_ready = 1;
 913
 914         /*
 915          * Enable interrupts now that everything is set up
 916          */
 917         sdio_claim_host(func);
 918         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 919         sdio_release_host(func);
 920         if (ret)
 921                 goto reclaim;
 922
 923         ret = lbs_start_card(priv);
 924         if (ret)
 925                 goto err_activate_card;
 926
 927         if (priv->fwcapinfo & FW_CAPINFO_PS)
 928                 priv->ps_supported = 1;
 929
 930 out:
 931         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 932
 933         return ret;
 934
 935 err_activate_card:
 936         flush_scheduled_work();
 937         free_netdev(priv->dev);
 938         kfree(priv);
 939 reclaim:
 940         sdio_claim_host(func);
 941 release_int:
 942         sdio_release_irq(func);
 943 disable:
 944         sdio_disable_func(func);
 945 release:
 946         sdio_release_host(func);
 947 free:
 948         while (card->packets) {
 949                 packet = card->packets;
 950                 card->packets = card->packets->next;
 951                 kfree(packet);
 952         }
 953
 954         kfree(card);
 955
 956         goto out;
 957 }
 958
 959 static void if_sdio_remove(struct sdio_func *func)
 960 {
 961         struct if_sdio_card *card;
 962         struct if_sdio_packet *packet;
 963
 964         lbs_deb_enter(LBS_DEB_SDIO);
 965
 966         card = sdio_get_drvdata(func);
 967
 968         card->priv->surpriseremoved = 1;
 969
 970         lbs_deb_sdio("call remove card\n");
 971         lbs_stop_card(card->priv);
 972         lbs_remove_card(card->priv);
 973
 974         flush_scheduled_work();
 975
 976         sdio_claim_host(func);
 977         sdio_release_irq(func);
 978         sdio_disable_func(func);
 979         sdio_release_host(func);
 980
 981         while (card->packets) {
 982                 packet = card->packets;
 983                 card->packets = card->packets->next;
 984                 kfree(packet);
 985         }
 986
 987         kfree(card);
 988
 989         lbs_deb_leave(LBS_DEB_SDIO);
 990 }
 991
 992 static struct sdio_driver if_sdio_driver = {
 993         .name           = "libertas_sdio",
 994         .id_table       = if_sdio_ids,
 995         .probe          = if_sdio_probe,
 996         .remove         = if_sdio_remove,
 997 };
 998
 999 /*******************************************************************/
1000 /* Module functions                                                */
1001 /*******************************************************************/
1002
1003 static int __init if_sdio_init_module(void)
1004 {
1005         int ret = 0;
1006
1007         lbs_deb_enter(LBS_DEB_SDIO);
1008
1009         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1010         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1011
1012         ret = sdio_register_driver(&if_sdio_driver);
1013
1014         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1015
1016         return ret;
1017 }
1018
1019 static void __exit if_sdio_exit_module(void)
1020 {
1021         lbs_deb_enter(LBS_DEB_SDIO);
1022
1023         sdio_unregister_driver(&if_sdio_driver);
1024
1025         lbs_deb_leave(LBS_DEB_SDIO);
1026 }
1027
1028 module_init(if_sdio_init_module);
1029 module_exit(if_sdio_exit_module);
1030
1031 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1032 MODULE_AUTHOR("Pierre Ossman");
1033 MODULE_LICENSE("GPL");