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 *lbs_helper_name = NULL;
  44 module_param_named(helper_name, lbs_helper_name, charp, 0644);
  45
  46 static char *lbs_fw_name = NULL;
  47 module_param_named(fw_name, lbs_fw_name, charp, 0644);
  48
  49 static const struct sdio_device_id if_sdio_ids[] = {
  50         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
  51         { /* end: all zeroes */                                         },
  52 };
  53
  54 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
  55
  56 struct if_sdio_model {
  57         int model;
  58         const char *helper;
  59         const char *firmware;
  60 };
  61
  62 static struct if_sdio_model if_sdio_models[] = {
  63         {
  64                 /* 8385 */
  65                 .model = 0x04,
  66                 .helper = "sd8385_helper.bin",
  67                 .firmware = "sd8385.bin",
  68         },
  69         {
  70                 /* 8686 */
  71                 .model = 0x0B,
  72                 .helper = "sd8686_helper.bin",
  73                 .firmware = "sd8686.bin",
  74         },
  75 };
  76
  77 struct if_sdio_packet {
  78         struct if_sdio_packet   *next;
  79         u16                     nb;
  80         u8                      buffer[0] __attribute__((aligned(4)));
  81 };
  82
  83 struct if_sdio_card {
  84         struct sdio_func        *func;
  85         struct lbs_private      *priv;
  86
  87         int                     model;
  88         unsigned long           ioport;
  89
  90         const char              *helper;
  91         const char              *firmware;
  92
  93         u8                      buffer[65536];
  94         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->driver_lock, flags);
 138
 139         if (!card->priv->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->cur_cmd->bufvirtualaddr, buffer, size);
 153         card->priv->upld_len = size;
 154
 155         card->int_cause |= MRVDRV_CMD_UPLD_RDY;
 156
 157         lbs_interrupt(card->priv->dev);
 158
 159         ret = 0;
 160
 161 out:
 162         spin_unlock_irqrestore(&card->priv->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 + NET_IP_ALIGN);
 186         if (!skb) {
 187                 ret = -ENOMEM;
 188                 goto out;
 189         }
 190
 191         skb_reserve(skb, NET_IP_ALIGN);
 192
 193         data = skb_put(skb, size);
 194
 195         memcpy(data, buffer, size);
 196
 197         lbs_process_rxed_packet(card->priv, skb);
 198
 199         ret = 0;
 200
 201 out:
 202         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 203
 204         return ret;
 205 }
 206
 207 static int if_sdio_handle_event(struct if_sdio_card *card,
 208                 u8 *buffer, unsigned size)
 209 {
 210         int ret;
 211         unsigned long flags;
 212         u32 event;
 213
 214         lbs_deb_enter(LBS_DEB_SDIO);
 215
 216         if (card->model == 0x04) {
 217                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 218                 if (ret)
 219                         goto out;
 220         } else {
 221                 if (size < 4) {
 222                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 223                                 (int)size);
 224                         ret = -EINVAL;
 225                         goto out;
 226                 }
 227                 event = buffer[3] << 24;
 228                 event |= buffer[2] << 16;
 229                 event |= buffer[1] << 8;
 230                 event |= buffer[0] << 0;
 231                 event <<= SBI_EVENT_CAUSE_SHIFT;
 232         }
 233
 234         spin_lock_irqsave(&card->priv->driver_lock, flags);
 235
 236         card->event = event;
 237         card->int_cause |= MRVDRV_CARDEVENT;
 238
 239         lbs_interrupt(card->priv->dev);
 240
 241         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 242
 243         ret = 0;
 244
 245 out:
 246         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 247
 248         return ret;
 249 }
 250
 251 static int if_sdio_card_to_host(struct if_sdio_card *card)
 252 {
 253         int ret;
 254         u8 status;
 255         u16 size, type, chunk;
 256         unsigned long timeout;
 257
 258         lbs_deb_enter(LBS_DEB_SDIO);
 259
 260         size = if_sdio_read_scratch(card, &ret);
 261         if (ret)
 262                 goto out;
 263
 264         if (size < 4) {
 265                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 266                         (int)size);
 267                 ret = -EINVAL;
 268                 goto out;
 269         }
 270
 271         timeout = jiffies + HZ;
 272         while (1) {
 273                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 274                 if (ret)
 275                         goto out;
 276                 if (status & IF_SDIO_IO_RDY)
 277                         break;
 278                 if (time_after(jiffies, timeout)) {
 279                         ret = -ETIMEDOUT;
 280                         goto out;
 281                 }
 282                 mdelay(1);
 283         }
 284
 285         /*
 286          * The transfer must be in one transaction or the firmware
 287          * goes suicidal.
 288          */
 289         chunk = size;
 290         if ((chunk > card->func->cur_blksize) || (chunk > 512)) {
 291                 chunk = (chunk + card->func->cur_blksize - 1) /
 292                         card->func->cur_blksize * card->func->cur_blksize;
 293         }
 294
 295         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 296         if (ret)
 297                 goto out;
 298
 299         chunk = card->buffer[0] | (card->buffer[1] << 8);
 300         type = card->buffer[2] | (card->buffer[3] << 8);
 301
 302         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 303                 (int)type, (int)chunk);
 304
 305         if (chunk > size) {
 306                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 307                         (int)chunk, (int)size);
 308                 ret = -EINVAL;
 309                 goto out;
 310         }
 311
 312         if (chunk < size) {
 313                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 314                         (int)chunk, (int)size);
 315         }
 316
 317         switch (type) {
 318         case MVMS_CMD:
 319                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 320                 if (ret)
 321                         goto out;
 322                 break;
 323         case MVMS_DAT:
 324                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 325                 if (ret)
 326                         goto out;
 327                 break;
 328         case MVMS_EVENT:
 329                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 330                 if (ret)
 331                         goto out;
 332                 break;
 333         default:
 334                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 335                                 (int)type);
 336                 ret = -EINVAL;
 337                 goto out;
 338         }
 339
 340 out:
 341         if (ret)
 342                 lbs_pr_err("problem fetching packet from firmware\n");
 343
 344         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 345
 346         return ret;
 347 }
 348
 349 static void if_sdio_host_to_card_worker(struct work_struct *work)
 350 {
 351         struct if_sdio_card *card;
 352         struct if_sdio_packet *packet;
 353         unsigned long timeout;
 354         u8 status;
 355         int ret;
 356         unsigned long flags;
 357
 358         lbs_deb_enter(LBS_DEB_SDIO);
 359
 360         card = container_of(work, struct if_sdio_card, packet_worker);
 361
 362         while (1) {
 363                 spin_lock_irqsave(&card->lock, flags);
 364                 packet = card->packets;
 365                 if (packet)
 366                         card->packets = packet->next;
 367                 spin_unlock_irqrestore(&card->lock, flags);
 368
 369                 if (!packet)
 370                         break;
 371
 372                 sdio_claim_host(card->func);
 373
 374                 timeout = jiffies + HZ;
 375                 while (1) {
 376                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 377                         if (ret)
 378                                 goto release;
 379                         if (status & IF_SDIO_IO_RDY)
 380                                 break;
 381                         if (time_after(jiffies, timeout)) {
 382                                 ret = -ETIMEDOUT;
 383                                 goto release;
 384                         }
 385                         mdelay(1);
 386                 }
 387
 388                 ret = sdio_writesb(card->func, card->ioport,
 389                                 packet->buffer, packet->nb);
 390                 if (ret)
 391                         goto release;
 392 release:
 393                 sdio_release_host(card->func);
 394
 395                 kfree(packet);
 396         }
 397
 398         lbs_deb_leave(LBS_DEB_SDIO);
 399 }
 400
 401 /********************************************************************/
 402 /* Firmware                                                         */
 403 /********************************************************************/
 404
 405 static int if_sdio_prog_helper(struct if_sdio_card *card)
 406 {
 407         int ret;
 408         u8 status;
 409         const struct firmware *fw;
 410         unsigned long timeout;
 411         u8 *chunk_buffer;
 412         u32 chunk_size;
 413         u8 *firmware;
 414         size_t size;
 415
 416         lbs_deb_enter(LBS_DEB_SDIO);
 417
 418         ret = request_firmware(&fw, card->helper, &card->func->dev);
 419         if (ret) {
 420                 lbs_pr_err("can't load helper firmware\n");
 421                 goto out;
 422         }
 423
 424         chunk_buffer = kzalloc(64, GFP_KERNEL);
 425         if (!chunk_buffer) {
 426                 ret = -ENOMEM;
 427                 goto release_fw;
 428         }
 429
 430         sdio_claim_host(card->func);
 431
 432         ret = sdio_set_block_size(card->func, 32);
 433         if (ret)
 434                 goto release;
 435
 436         firmware = fw->data;
 437         size = fw->size;
 438
 439         while (size) {
 440                 timeout = jiffies + HZ;
 441                 while (1) {
 442                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 443                         if (ret)
 444                                 goto release;
 445                         if ((status & IF_SDIO_IO_RDY) &&
 446                                         (status & IF_SDIO_DL_RDY))
 447                                 break;
 448                         if (time_after(jiffies, timeout)) {
 449                                 ret = -ETIMEDOUT;
 450                                 goto release;
 451                         }
 452                         mdelay(1);
 453                 }
 454
 455                 chunk_size = min(size, (size_t)60);
 456
 457                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 458                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 459 /*
 460                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 461 */
 462                 ret = sdio_writesb(card->func, card->ioport,
 463                                 chunk_buffer, 64);
 464                 if (ret)
 465                         goto release;
 466
 467                 firmware += chunk_size;
 468                 size -= chunk_size;
 469         }
 470
 471         /* an empty block marks the end of the transfer */
 472         memset(chunk_buffer, 0, 4);
 473         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 474         if (ret)
 475                 goto release;
 476
 477         lbs_deb_sdio("waiting for helper to boot...\n");
 478
 479         /* wait for the helper to boot by looking at the size register */
 480         timeout = jiffies + HZ;
 481         while (1) {
 482                 u16 req_size;
 483
 484                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 485                 if (ret)
 486                         goto release;
 487
 488                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 489                 if (ret)
 490                         goto release;
 491
 492                 if (req_size != 0)
 493                         break;
 494
 495                 if (time_after(jiffies, timeout)) {
 496                         ret = -ETIMEDOUT;
 497                         goto release;
 498                 }
 499
 500                 msleep(10);
 501         }
 502
 503         ret = 0;
 504
 505 release:
 506         sdio_set_block_size(card->func, 0);
 507         sdio_release_host(card->func);
 508         kfree(chunk_buffer);
 509 release_fw:
 510         release_firmware(fw);
 511
 512 out:
 513         if (ret)
 514                 lbs_pr_err("failed to load helper firmware\n");
 515
 516         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 517
 518         return ret;
 519 }
 520
 521 static int if_sdio_prog_real(struct if_sdio_card *card)
 522 {
 523         int ret;
 524         u8 status;
 525         const struct firmware *fw;
 526         unsigned long timeout;
 527         u8 *chunk_buffer;
 528         u32 chunk_size;
 529         u8 *firmware;
 530         size_t size, req_size;
 531
 532         lbs_deb_enter(LBS_DEB_SDIO);
 533
 534         ret = request_firmware(&fw, card->firmware, &card->func->dev);
 535         if (ret) {
 536                 lbs_pr_err("can't load firmware\n");
 537                 goto out;
 538         }
 539
 540         chunk_buffer = kzalloc(512, GFP_KERNEL);
 541         if (!chunk_buffer) {
 542                 ret = -ENOMEM;
 543                 goto release_fw;
 544         }
 545
 546         sdio_claim_host(card->func);
 547
 548         ret = sdio_set_block_size(card->func, 32);
 549         if (ret)
 550                 goto release;
 551
 552         firmware = fw->data;
 553         size = fw->size;
 554
 555         while (size) {
 556                 timeout = jiffies + HZ;
 557                 while (1) {
 558                         status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 559                         if (ret)
 560                                 goto release;
 561                         if ((status & IF_SDIO_IO_RDY) &&
 562                                         (status & IF_SDIO_DL_RDY))
 563                                 break;
 564                         if (time_after(jiffies, timeout)) {
 565                                 ret = -ETIMEDOUT;
 566                                 goto release;
 567                         }
 568                         mdelay(1);
 569                 }
 570
 571                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 572                 if (ret)
 573                         goto release;
 574
 575                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 576                 if (ret)
 577                         goto release;
 578 /*
 579                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 580 */
 581                 if (req_size == 0) {
 582                         lbs_deb_sdio("firmware helper gave up early\n");
 583                         ret = -EIO;
 584                         goto release;
 585                 }
 586
 587                 if (req_size & 0x01) {
 588                         lbs_deb_sdio("firmware helper signalled error\n");
 589                         ret = -EIO;
 590                         goto release;
 591                 }
 592
 593                 if (req_size > size)
 594                         req_size = size;
 595
 596                 while (req_size) {
 597                         chunk_size = min(req_size, (size_t)512);
 598
 599                         memcpy(chunk_buffer, firmware, chunk_size);
 600 /*
 601                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 602                                 chunk_size, (chunk_size + 31) / 32 * 32);
 603 */
 604                         ret = sdio_writesb(card->func, card->ioport,
 605                                 chunk_buffer, (chunk_size + 31) / 32 * 32);
 606                         if (ret)
 607                                 goto release;
 608
 609                         firmware += chunk_size;
 610                         size -= chunk_size;
 611                         req_size -= chunk_size;
 612                 }
 613         }
 614
 615         ret = 0;
 616
 617         lbs_deb_sdio("waiting for firmware to boot...\n");
 618
 619         /* wait for the firmware to boot */
 620         timeout = jiffies + HZ;
 621         while (1) {
 622                 u16 scratch;
 623
 624                 scratch = if_sdio_read_scratch(card, &ret);
 625                 if (ret)
 626                         goto release;
 627
 628                 if (scratch == IF_SDIO_FIRMWARE_OK)
 629                         break;
 630
 631                 if (time_after(jiffies, timeout)) {
 632                         ret = -ETIMEDOUT;
 633                         goto release;
 634                 }
 635
 636                 msleep(10);
 637         }
 638
 639         ret = 0;
 640
 641 release:
 642         sdio_set_block_size(card->func, 0);
 643         sdio_release_host(card->func);
 644         kfree(chunk_buffer);
 645 release_fw:
 646         release_firmware(fw);
 647
 648 out:
 649         if (ret)
 650                 lbs_pr_err("failed to load firmware\n");
 651
 652         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 653
 654         return ret;
 655 }
 656
 657 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 658 {
 659         int ret;
 660         u16 scratch;
 661
 662         lbs_deb_enter(LBS_DEB_SDIO);
 663
 664         sdio_claim_host(card->func);
 665         scratch = if_sdio_read_scratch(card, &ret);
 666         sdio_release_host(card->func);
 667
 668         if (ret)
 669                 goto out;
 670
 671         if (scratch == IF_SDIO_FIRMWARE_OK) {
 672                 lbs_deb_sdio("firmware already loaded\n");
 673                 goto success;
 674         }
 675
 676         ret = if_sdio_prog_helper(card);
 677         if (ret)
 678                 goto out;
 679
 680         ret = if_sdio_prog_real(card);
 681         if (ret)
 682                 goto out;
 683
 684 success:
 685         ret = 0;
 686
 687 out:
 688         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 689
 690         return ret;
 691 }
 692
 693 /*******************************************************************/
 694 /* Libertas callbacks                                              */
 695 /*******************************************************************/
 696
 697 static int if_sdio_host_to_card(struct lbs_private *priv,
 698                 u8 type, u8 *buf, u16 nb)
 699 {
 700         int ret;
 701         struct if_sdio_card *card;
 702         struct if_sdio_packet *packet, *cur;
 703         u16 size;
 704         unsigned long flags;
 705
 706         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 707
 708         card = priv->card;
 709
 710         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 711                 ret = -EINVAL;
 712                 goto out;
 713         }
 714
 715         /*
 716          * The transfer must be in one transaction or the firmware
 717          * goes suicidal.
 718          */
 719         size = nb + 4;
 720         if ((size > card->func->cur_blksize) || (size > 512)) {
 721                 size = (size + card->func->cur_blksize - 1) /
 722                         card->func->cur_blksize * card->func->cur_blksize;
 723         }
 724
 725         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 726                         GFP_ATOMIC);
 727         if (!packet) {
 728                 ret = -ENOMEM;
 729                 goto out;
 730         }
 731
 732         packet->next = NULL;
 733         packet->nb = size;
 734
 735         /*
 736          * SDIO specific header.
 737          */
 738         packet->buffer[0] = (nb + 4) & 0xff;
 739         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 740         packet->buffer[2] = type;
 741         packet->buffer[3] = 0;
 742
 743         memcpy(packet->buffer + 4, buf, nb);
 744
 745         spin_lock_irqsave(&card->lock, flags);
 746
 747         if (!card->packets)
 748                 card->packets = packet;
 749         else {
 750                 cur = card->packets;
 751                 while (cur->next)
 752                         cur = cur->next;
 753                 cur->next = packet;
 754         }
 755
 756         switch (type) {
 757         case MVMS_CMD:
 758                 priv->dnld_sent = DNLD_CMD_SENT;
 759                 break;
 760         case MVMS_DAT:
 761                 priv->dnld_sent = DNLD_DATA_SENT;
 762                 break;
 763         default:
 764                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 765         }
 766
 767         spin_unlock_irqrestore(&card->lock, flags);
 768
 769         schedule_work(&card->packet_worker);
 770
 771         ret = 0;
 772
 773 out:
 774         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 775
 776         return ret;
 777 }
 778
 779 static int if_sdio_get_int_status(struct lbs_private *priv, u8 *ireg)
 780 {
 781         struct if_sdio_card *card;
 782
 783         lbs_deb_enter(LBS_DEB_SDIO);
 784
 785         card = priv->card;
 786
 787         *ireg = card->int_cause;
 788         card->int_cause = 0;
 789
 790         lbs_deb_leave(LBS_DEB_SDIO);
 791
 792         return 0;
 793 }
 794
 795 static int if_sdio_read_event_cause(struct lbs_private *priv)
 796 {
 797         struct if_sdio_card *card;
 798
 799         lbs_deb_enter(LBS_DEB_SDIO);
 800
 801         card = priv->card;
 802
 803         priv->eventcause = card->event;
 804
 805         lbs_deb_leave(LBS_DEB_SDIO);
 806
 807         return 0;
 808 }
 809
 810 /*******************************************************************/
 811 /* SDIO callbacks                                                  */
 812 /*******************************************************************/
 813
 814 static void if_sdio_interrupt(struct sdio_func *func)
 815 {
 816         int ret;
 817         struct if_sdio_card *card;
 818         u8 cause;
 819
 820         lbs_deb_enter(LBS_DEB_SDIO);
 821
 822         card = sdio_get_drvdata(func);
 823
 824         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 825         if (ret)
 826                 goto out;
 827
 828         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 829
 830         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 831         if (ret)
 832                 goto out;
 833
 834         /*
 835          * Ignore the define name, this really means the card has
 836          * successfully received the command.
 837          */
 838         if (cause & IF_SDIO_H_INT_DNLD)
 839                 lbs_host_to_card_done(card->priv);
 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         struct lbs_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                if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 873                        model = 4;
 874                        break;
 875                }
 876         }
 877
 878         if (i == func->card->num_info) {
 879                 lbs_pr_err("unable to identify card model\n");
 880                 return -ENODEV;
 881         }
 882
 883         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 884         if (!card)
 885                 return -ENOMEM;
 886
 887         card->func = func;
 888         card->model = model;
 889         spin_lock_init(&card->lock);
 890         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 891
 892         for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
 893                 if (card->model == if_sdio_models[i].model)
 894                         break;
 895         }
 896
 897         if (i == ARRAY_SIZE(if_sdio_models)) {
 898                 lbs_pr_err("unkown card model 0x%x\n", card->model);
 899                 ret = -ENODEV;
 900                 goto free;
 901         }
 902
 903         card->helper = if_sdio_models[i].helper;
 904         card->firmware = if_sdio_models[i].firmware;
 905
 906         if (lbs_helper_name) {
 907                 lbs_deb_sdio("overriding helper firmware: %s\n",
 908                         lbs_helper_name);
 909                 card->helper = lbs_helper_name;
 910         }
 911
 912         if (lbs_fw_name) {
 913                 lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
 914                 card->firmware = lbs_fw_name;
 915         }
 916
 917         sdio_claim_host(func);
 918
 919         ret = sdio_enable_func(func);
 920         if (ret)
 921                 goto release;
 922
 923         ret = sdio_claim_irq(func, if_sdio_interrupt);
 924         if (ret)
 925                 goto disable;
 926
 927         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
 928         if (ret)
 929                 goto release_int;
 930
 931         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
 932         if (ret)
 933                 goto release_int;
 934
 935         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
 936         if (ret)
 937                 goto release_int;
 938
 939         sdio_release_host(func);
 940
 941         sdio_set_drvdata(func, card);
 942
 943         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
 944                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
 945                         func->class, func->vendor, func->device,
 946                         model, (unsigned)card->ioport);
 947
 948         ret = if_sdio_prog_firmware(card);
 949         if (ret)
 950                 goto reclaim;
 951
 952         priv = lbs_add_card(card, &func->dev);
 953         if (!priv) {
 954                 ret = -ENOMEM;
 955                 goto reclaim;
 956         }
 957
 958         card->priv = priv;
 959
 960         priv->card = card;
 961         priv->hw_host_to_card = if_sdio_host_to_card;
 962         priv->hw_get_int_status = if_sdio_get_int_status;
 963         priv->hw_read_event_cause = if_sdio_read_event_cause;
 964
 965         priv->fw_ready = 1;
 966
 967         /*
 968          * Enable interrupts now that everything is set up
 969          */
 970         sdio_claim_host(func);
 971         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
 972         sdio_release_host(func);
 973         if (ret)
 974                 goto reclaim;
 975
 976         ret = lbs_start_card(priv);
 977         if (ret)
 978                 goto err_activate_card;
 979
 980 out:
 981         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 982
 983         return ret;
 984
 985 err_activate_card:
 986         flush_scheduled_work();
 987         free_netdev(priv->dev);
 988         kfree(priv);
 989 reclaim:
 990         sdio_claim_host(func);
 991 release_int:
 992         sdio_release_irq(func);
 993 disable:
 994         sdio_disable_func(func);
 995 release:
 996         sdio_release_host(func);
 997 free:
 998         while (card->packets) {
 999                 packet = card->packets;
1000                 card->packets = card->packets->next;
1001                 kfree(packet);
1002         }
1003
1004         kfree(card);
1005
1006         goto out;
1007 }
1008
1009 static void if_sdio_remove(struct sdio_func *func)
1010 {
1011         struct if_sdio_card *card;
1012         struct if_sdio_packet *packet;
1013
1014         lbs_deb_enter(LBS_DEB_SDIO);
1015
1016         card = sdio_get_drvdata(func);
1017
1018         card->priv->surpriseremoved = 1;
1019
1020         lbs_deb_sdio("call remove card\n");
1021         lbs_stop_card(card->priv);
1022         lbs_remove_card(card->priv);
1023
1024         flush_scheduled_work();
1025
1026         sdio_claim_host(func);
1027         sdio_release_irq(func);
1028         sdio_disable_func(func);
1029         sdio_release_host(func);
1030
1031         while (card->packets) {
1032                 packet = card->packets;
1033                 card->packets = card->packets->next;
1034                 kfree(packet);
1035         }
1036
1037         kfree(card);
1038
1039         lbs_deb_leave(LBS_DEB_SDIO);
1040 }
1041
1042 static struct sdio_driver if_sdio_driver = {
1043         .name           = "libertas_sdio",
1044         .id_table       = if_sdio_ids,
1045         .probe          = if_sdio_probe,
1046         .remove         = if_sdio_remove,
1047 };
1048
1049 /*******************************************************************/
1050 /* Module functions                                                */
1051 /*******************************************************************/
1052
1053 static int __init if_sdio_init_module(void)
1054 {
1055         int ret = 0;
1056
1057         lbs_deb_enter(LBS_DEB_SDIO);
1058
1059         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1060         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1061
1062         ret = sdio_register_driver(&if_sdio_driver);
1063
1064         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1065
1066         return ret;
1067 }
1068
1069 static void __exit if_sdio_exit_module(void)
1070 {
1071         lbs_deb_enter(LBS_DEB_SDIO);
1072
1073         sdio_unregister_driver(&if_sdio_driver);
1074
1075         lbs_deb_leave(LBS_DEB_SDIO);
1076 }
1077
1078 module_init(if_sdio_init_module);
1079 module_exit(if_sdio_exit_module);
1080
1081 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1082 MODULE_AUTHOR("Pierre Ossman");
1083 MODULE_LICENSE("GPL");