drivers/misc/iwmc3200top/main.c

   1 /*
   2  * iwmc3200top - Intel Wireless MultiCom 3200 Top Driver
   3  * drivers/misc/iwmc3200top/main.c
   4  *
   5  * Copyright (C) 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License version
   9  * 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  * 02110-1301, USA.
  20  *
  21  *
  22  * Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com>
  23  *  -
  24  *
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/slab.h>
  29 #include <linux/init.h>
  30 #include <linux/kernel.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/mmc/sdio_ids.h>
  33 #include <linux/mmc/sdio_func.h>
  34 #include <linux/mmc/sdio.h>
  35
  36 #include "iwmc3200top.h"
  37 #include "log.h"
  38 #include "fw-msg.h"
  39 #include "debugfs.h"
  40
  41
  42 #define DRIVER_DESCRIPTION "Intel(R) IWMC 3200 Top Driver"
  43 #define DRIVER_COPYRIGHT "Copyright (c) 2008 Intel Corporation."
  44
  45 #define DRIVER_VERSION  "0.1.62"
  46
  47 MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
  48 MODULE_VERSION(DRIVER_VERSION);
  49 MODULE_LICENSE("GPL");
  50 MODULE_AUTHOR(DRIVER_COPYRIGHT);
  51 MODULE_FIRMWARE(FW_NAME(FW_API_VER));
  52
  53
  54 static inline int __iwmct_tx(struct iwmct_priv *priv, void *src, int count)
  55 {
  56         return sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, src, count);
  57
  58 }
  59 int iwmct_tx(struct iwmct_priv *priv, void *src, int count)
  60 {
  61         int ret;
  62         sdio_claim_host(priv->func);
  63         ret =  __iwmct_tx(priv, src, count);
  64         sdio_release_host(priv->func);
  65         return ret;
  66 }
  67 /*
  68  * This workers main task is to wait for OP_OPR_ALIVE
  69  * from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed.
  70  * When OP_OPR_ALIVE received it will issue
  71  * a call to "bus_rescan_devices".
  72  */
  73 static void iwmct_rescan_worker(struct work_struct *ws)
  74 {
  75         struct iwmct_priv *priv;
  76         int ret;
  77
  78         priv = container_of(ws, struct iwmct_priv, bus_rescan_worker);
  79
  80         LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n");
  81
  82         ret = bus_rescan_devices(priv->func->dev.bus);
  83         if (ret < 0)
  84                 LOG_INFO(priv, INIT, "bus_rescan_devices FAILED!!!\n");
  85 }
  86
  87 static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg)
  88 {
  89         switch (msg->hdr.opcode) {
  90         case OP_OPR_ALIVE:
  91                 LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n");
  92                 queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker);
  93                 break;
  94         default:
  95                 LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n",
  96                         msg->hdr.opcode);
  97                 break;
  98         }
  99 }
 100
 101
 102 static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len)
 103 {
 104         struct top_msg *msg;
 105
 106         msg = (struct top_msg *)buf;
 107
 108         if (msg->hdr.type != COMM_TYPE_D2H) {
 109                 LOG_ERROR(priv, FW_MSG,
 110                         "Message from TOP with invalid message type 0x%X\n",
 111                         msg->hdr.type);
 112                 return;
 113         }
 114
 115         if (len < sizeof(msg->hdr)) {
 116                 LOG_ERROR(priv, FW_MSG,
 117                         "Message from TOP is too short for message header "
 118                         "received %d bytes, expected at least %zd bytes\n",
 119                         len, sizeof(msg->hdr));
 120                 return;
 121         }
 122
 123         if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) {
 124                 LOG_ERROR(priv, FW_MSG,
 125                         "Message length (%d bytes) is shorter than "
 126                         "in header (%d bytes)\n",
 127                         len, le16_to_cpu(msg->hdr.length));
 128                 return;
 129         }
 130
 131         switch (msg->hdr.category) {
 132         case COMM_CATEGORY_OPERATIONAL:
 133                 op_top_message(priv, (struct top_msg *)buf);
 134                 break;
 135
 136         case COMM_CATEGORY_DEBUG:
 137         case COMM_CATEGORY_TESTABILITY:
 138         case COMM_CATEGORY_DIAGNOSTICS:
 139                 iwmct_log_top_message(priv, buf, len);
 140                 break;
 141
 142         default:
 143                 LOG_ERROR(priv, FW_MSG,
 144                         "Message from TOP with unknown category 0x%X\n",
 145                         msg->hdr.category);
 146                 break;
 147         }
 148 }
 149
 150 int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len)
 151 {
 152         int ret;
 153         u8 *buf;
 154
 155         LOG_TRACE(priv, FW_MSG, "Sending hcmd:\n");
 156
 157         /* add padding to 256 for IWMC */
 158         ((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256;
 159
 160         LOG_HEXDUMP(FW_MSG, cmd, len);
 161
 162         if (len > FW_HCMD_BLOCK_SIZE) {
 163                 LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n",
 164                           len, FW_HCMD_BLOCK_SIZE);
 165                 return -1;
 166         }
 167
 168         buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL);
 169         if (!buf) {
 170                 LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n",
 171                           FW_HCMD_BLOCK_SIZE);
 172                 return -1;
 173         }
 174
 175         memcpy(buf, cmd, len);
 176         ret = iwmct_tx(priv, buf, FW_HCMD_BLOCK_SIZE);
 177
 178         kfree(buf);
 179         return ret;
 180 }
 181
 182
 183 static void iwmct_irq_read_worker(struct work_struct *ws)
 184 {
 185         struct iwmct_priv *priv;
 186         struct iwmct_work_struct *read_req;
 187         __le32 *buf = NULL;
 188         int ret;
 189         int iosize;
 190         u32 barker;
 191         bool is_barker;
 192
 193         priv = container_of(ws, struct iwmct_priv, isr_worker);
 194
 195         LOG_TRACE(priv, IRQ, "enter iwmct_irq_read_worker %p\n", ws);
 196
 197         /* --------------------- Handshake with device -------------------- */
 198         sdio_claim_host(priv->func);
 199
 200         /* all list manipulations have to be protected by
 201          * sdio_claim_host/sdio_release_host */
 202         if (list_empty(&priv->read_req_list)) {
 203                 LOG_ERROR(priv, IRQ, "read_req_list empty in read worker\n");
 204                 goto exit_release;
 205         }
 206
 207         read_req = list_entry(priv->read_req_list.next,
 208                               struct iwmct_work_struct, list);
 209
 210         list_del(&read_req->list);
 211         iosize = read_req->iosize;
 212         kfree(read_req);
 213
 214         buf = kzalloc(iosize, GFP_KERNEL);
 215         if (!buf) {
 216                 LOG_ERROR(priv, IRQ, "kzalloc error, buf size %d\n", iosize);
 217                 goto exit_release;
 218         }
 219
 220         LOG_INFO(priv, IRQ, "iosize=%d, buf=%p, func=%d\n",
 221                                 iosize, buf, priv->func->num);
 222
 223         /* read from device */
 224         ret = sdio_memcpy_fromio(priv->func, buf, IWMC_SDIO_DATA_ADDR, iosize);
 225         if (ret) {
 226                 LOG_ERROR(priv, IRQ, "error %d reading buffer\n", ret);
 227                 goto exit_release;
 228         }
 229
 230         LOG_HEXDUMP(IRQ, (u8 *)buf, iosize);
 231
 232         barker = le32_to_cpu(buf[0]);
 233
 234         /* Verify whether it's a barker and if not - treat as regular Rx */
 235         if (barker == IWMC_BARKER_ACK ||
 236             (barker & BARKER_DNLOAD_BARKER_MSK) == IWMC_BARKER_REBOOT) {
 237
 238                 /* Valid Barker is equal on first 4 dwords */
 239                 is_barker = (buf[1] == buf[0]) &&
 240                             (buf[2] == buf[0]) &&
 241                             (buf[3] == buf[0]);
 242
 243                 if (!is_barker) {
 244                         LOG_WARNING(priv, IRQ,
 245                                 "Potentially inconsistent barker "
 246                                 "%08X_%08X_%08X_%08X\n",
 247                                 le32_to_cpu(buf[0]), le32_to_cpu(buf[1]),
 248                                 le32_to_cpu(buf[2]), le32_to_cpu(buf[3]));
 249                 }
 250         } else {
 251                 is_barker = false;
 252         }
 253
 254         /* Handle Top CommHub message */
 255         if (!is_barker) {
 256                 sdio_release_host(priv->func);
 257                 handle_top_message(priv, (u8 *)buf, iosize);
 258                 goto exit;
 259         } else if (barker == IWMC_BARKER_ACK) { /* Handle barkers */
 260                 if (atomic_read(&priv->dev_sync) == 0) {
 261                         LOG_ERROR(priv, IRQ,
 262                                   "ACK barker arrived out-of-sync\n");
 263                         goto exit_release;
 264                 }
 265
 266                 /* Continuing to FW download (after Sync is completed)*/
 267                 atomic_set(&priv->dev_sync, 0);
 268                 LOG_INFO(priv, IRQ, "ACK barker arrived "
 269                                 "- starting FW download\n");
 270         } else { /* REBOOT barker */
 271                 LOG_INFO(priv, IRQ, "Recieved reboot barker: %x\n", barker);
 272                 priv->barker = barker;
 273
 274                 if (barker & BARKER_DNLOAD_SYNC_MSK) {
 275                         /* Send the same barker back */
 276                         ret = __iwmct_tx(priv, buf, iosize);
 277                         if (ret) {
 278                                 LOG_ERROR(priv, IRQ,
 279                                          "error %d echoing barker\n", ret);
 280                                 goto exit_release;
 281                         }
 282                         LOG_INFO(priv, IRQ, "Echoing barker to device\n");
 283                         atomic_set(&priv->dev_sync, 1);
 284                         goto exit_release;
 285                 }
 286
 287                 /* Continuing to FW download (without Sync) */
 288                 LOG_INFO(priv, IRQ, "No sync requested "
 289                                     "- starting FW download\n");
 290         }
 291
 292         sdio_release_host(priv->func);
 293
 294         if (priv->dbg.fw_download)
 295                 iwmct_fw_load(priv);
 296         else
 297                 LOG_ERROR(priv, IRQ, "FW download not allowed\n");
 298
 299         goto exit;
 300
 301 exit_release:
 302         sdio_release_host(priv->func);
 303 exit:
 304         kfree(buf);
 305         LOG_TRACE(priv, IRQ, "exit iwmct_irq_read_worker\n");
 306 }
 307
 308 static void iwmct_irq(struct sdio_func *func)
 309 {
 310         struct iwmct_priv *priv;
 311         int val, ret;
 312         int iosize;
 313         int addr = IWMC_SDIO_INTR_GET_SIZE_ADDR;
 314         struct iwmct_work_struct *read_req;
 315
 316         priv = sdio_get_drvdata(func);
 317
 318         LOG_TRACE(priv, IRQ, "enter iwmct_irq\n");
 319
 320         /* read the function's status register */
 321         val = sdio_readb(func, IWMC_SDIO_INTR_STATUS_ADDR, &ret);
 322
 323         LOG_TRACE(priv, IRQ, "iir value = %d, ret=%d\n", val, ret);
 324
 325         if (!val) {
 326                 LOG_ERROR(priv, IRQ, "iir = 0, exiting ISR\n");
 327                 goto exit_clear_intr;
 328         }
 329
 330
 331         /*
 332          * read 2 bytes of the transaction size
 333          * IMPORTANT: sdio transaction size has to be read before clearing
 334          * sdio interrupt!!!
 335          */
 336         val = sdio_readb(priv->func, addr++, &ret);
 337         iosize = val;
 338         val = sdio_readb(priv->func, addr++, &ret);
 339         iosize += val << 8;
 340
 341         LOG_INFO(priv, IRQ, "READ size %d\n", iosize);
 342
 343         if (iosize == 0) {
 344                 LOG_ERROR(priv, IRQ, "READ size %d, exiting ISR\n", iosize);
 345                 goto exit_clear_intr;
 346         }
 347
 348         /* allocate a work structure to pass iosize to the worker */
 349         read_req = kzalloc(sizeof(struct iwmct_work_struct), GFP_KERNEL);
 350         if (!read_req) {
 351                 LOG_ERROR(priv, IRQ, "failed to allocate read_req, exit ISR\n");
 352                 goto exit_clear_intr;
 353         }
 354
 355         INIT_LIST_HEAD(&read_req->list);
 356         read_req->iosize = iosize;
 357
 358         list_add_tail(&priv->read_req_list, &read_req->list);
 359
 360         /* clear the function's interrupt request bit (write 1 to clear) */
 361         sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
 362
 363         queue_work(priv->wq, &priv->isr_worker);
 364
 365         LOG_TRACE(priv, IRQ, "exit iwmct_irq\n");
 366
 367         return;
 368
 369 exit_clear_intr:
 370         /* clear the function's interrupt request bit (write 1 to clear) */
 371         sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
 372 }
 373
 374
 375 static int blocks;
 376 module_param(blocks, int, 0604);
 377 MODULE_PARM_DESC(blocks, "max_blocks_to_send");
 378
 379 static int dump;
 380 module_param(dump, bool, 0604);
 381 MODULE_PARM_DESC(dump, "dump_hex_content");
 382
 383 static int jump = 1;
 384 module_param(jump, bool, 0604);
 385
 386 static int direct = 1;
 387 module_param(direct, bool, 0604);
 388
 389 static int checksum = 1;
 390 module_param(checksum, bool, 0604);
 391
 392 static int fw_download = 1;
 393 module_param(fw_download, bool, 0604);
 394
 395 static int block_size = IWMC_SDIO_BLK_SIZE;
 396 module_param(block_size, int, 0404);
 397
 398 static int download_trans_blks = IWMC_DEFAULT_TR_BLK;
 399 module_param(download_trans_blks, int, 0604);
 400
 401 static int rubbish_barker;
 402 module_param(rubbish_barker, bool, 0604);
 403
 404 #ifdef CONFIG_IWMC3200TOP_DEBUG
 405 static int log_level[LOG_SRC_MAX];
 406 static unsigned int log_level_argc;
 407 module_param_array(log_level, int, &log_level_argc, 0604);
 408 MODULE_PARM_DESC(log_level, "log_level");
 409
 410 static int log_level_fw[FW_LOG_SRC_MAX];
 411 static unsigned int log_level_fw_argc;
 412 module_param_array(log_level_fw, int, &log_level_fw_argc, 0604);
 413 MODULE_PARM_DESC(log_level_fw, "log_level_fw");
 414 #endif
 415
 416 void iwmct_dbg_init_params(struct iwmct_priv *priv)
 417 {
 418 #ifdef CONFIG_IWMC3200TOP_DEBUG
 419         int i;
 420
 421         for (i = 0; i < log_level_argc; i++) {
 422                 dev_notice(&priv->func->dev, "log_level[%d]=0x%X\n",
 423                                                 i, log_level[i]);
 424                 iwmct_log_set_filter((log_level[i] >> 8) & 0xFF,
 425                                log_level[i] & 0xFF);
 426         }
 427         for (i = 0; i < log_level_fw_argc; i++) {
 428                 dev_notice(&priv->func->dev, "log_level_fw[%d]=0x%X\n",
 429                                                 i, log_level_fw[i]);
 430                 iwmct_log_set_fw_filter((log_level_fw[i] >> 8) & 0xFF,
 431                                   log_level_fw[i] & 0xFF);
 432         }
 433 #endif
 434
 435         priv->dbg.blocks = blocks;
 436         LOG_INFO(priv, INIT, "blocks=%d\n", blocks);
 437         priv->dbg.dump = (bool)dump;
 438         LOG_INFO(priv, INIT, "dump=%d\n", dump);
 439         priv->dbg.jump = (bool)jump;
 440         LOG_INFO(priv, INIT, "jump=%d\n", jump);
 441         priv->dbg.direct = (bool)direct;
 442         LOG_INFO(priv, INIT, "direct=%d\n", direct);
 443         priv->dbg.checksum = (bool)checksum;
 444         LOG_INFO(priv, INIT, "checksum=%d\n", checksum);
 445         priv->dbg.fw_download = (bool)fw_download;
 446         LOG_INFO(priv, INIT, "fw_download=%d\n", fw_download);
 447         priv->dbg.block_size = block_size;
 448         LOG_INFO(priv, INIT, "block_size=%d\n", block_size);
 449         priv->dbg.download_trans_blks = download_trans_blks;
 450         LOG_INFO(priv, INIT, "download_trans_blks=%d\n", download_trans_blks);
 451 }
 452
 453 /*****************************************************************************
 454  *
 455  * sysfs attributes
 456  *
 457  *****************************************************************************/
 458 static ssize_t show_iwmct_fw_version(struct device *d,
 459                                   struct device_attribute *attr, char *buf)
 460 {
 461         struct iwmct_priv *priv = dev_get_drvdata(d);
 462         return sprintf(buf, "%s\n", priv->dbg.label_fw);
 463 }
 464 static DEVICE_ATTR(cc_label_fw, S_IRUGO, show_iwmct_fw_version, NULL);
 465
 466 #ifdef CONFIG_IWMC3200TOP_DEBUG
 467 static DEVICE_ATTR(log_level, S_IWUSR | S_IRUGO,
 468                    show_iwmct_log_level, store_iwmct_log_level);
 469 static DEVICE_ATTR(log_level_fw, S_IWUSR | S_IRUGO,
 470                    show_iwmct_log_level_fw, store_iwmct_log_level_fw);
 471 #endif
 472
 473 static struct attribute *iwmct_sysfs_entries[] = {
 474         &dev_attr_cc_label_fw.attr,
 475 #ifdef CONFIG_IWMC3200TOP_DEBUG
 476         &dev_attr_log_level.attr,
 477         &dev_attr_log_level_fw.attr,
 478 #endif
 479         NULL
 480 };
 481
 482 static struct attribute_group iwmct_attribute_group = {
 483         .name = NULL,           /* put in device directory */
 484         .attrs = iwmct_sysfs_entries,
 485 };
 486
 487
 488 static int iwmct_probe(struct sdio_func *func,
 489                            const struct sdio_device_id *id)
 490 {
 491         struct iwmct_priv *priv;
 492         int ret;
 493         int val = 1;
 494         int addr = IWMC_SDIO_INTR_ENABLE_ADDR;
 495
 496         dev_dbg(&func->dev, "enter iwmct_probe\n");
 497
 498         dev_dbg(&func->dev, "IRQ polling period id %u msecs, HZ is %d\n",
 499                 jiffies_to_msecs(2147483647), HZ);
 500
 501         priv = kzalloc(sizeof(struct iwmct_priv), GFP_KERNEL);
 502         if (!priv) {
 503                 dev_err(&func->dev, "kzalloc error\n");
 504                 return -ENOMEM;
 505         }
 506         priv->func = func;
 507         sdio_set_drvdata(func, priv);
 508
 509
 510         /* create drivers work queue */
 511         priv->wq = create_workqueue(DRV_NAME "_wq");
 512         priv->bus_rescan_wq = create_workqueue(DRV_NAME "_rescan_wq");
 513         INIT_WORK(&priv->bus_rescan_worker, iwmct_rescan_worker);
 514         INIT_WORK(&priv->isr_worker, iwmct_irq_read_worker);
 515
 516         init_waitqueue_head(&priv->wait_q);
 517
 518         sdio_claim_host(func);
 519         /* FIXME: Remove after it is fixed in the Boot ROM upgrade */
 520         func->enable_timeout = 10;
 521
 522         /* In our HW, setting the block size also wakes up the boot rom. */
 523         ret = sdio_set_block_size(func, priv->dbg.block_size);
 524         if (ret) {
 525                 LOG_ERROR(priv, INIT,
 526                         "sdio_set_block_size() failure: %d\n", ret);
 527                 goto error_sdio_enable;
 528         }
 529
 530         ret = sdio_enable_func(func);
 531         if (ret) {
 532                 LOG_ERROR(priv, INIT, "sdio_enable_func() failure: %d\n", ret);
 533                 goto error_sdio_enable;
 534         }
 535
 536         /* init reset and dev_sync states */
 537         atomic_set(&priv->reset, 0);
 538         atomic_set(&priv->dev_sync, 0);
 539
 540         /* init read req queue */
 541         INIT_LIST_HEAD(&priv->read_req_list);
 542
 543         /* process configurable parameters */
 544         iwmct_dbg_init_params(priv);
 545         ret = sysfs_create_group(&func->dev.kobj, &iwmct_attribute_group);
 546         if (ret) {
 547                 LOG_ERROR(priv, INIT, "Failed to register attributes and "
 548                          "initialize module_params\n");
 549                 goto error_dev_attrs;
 550         }
 551
 552         iwmct_dbgfs_register(priv, DRV_NAME);
 553
 554         if (!priv->dbg.direct && priv->dbg.download_trans_blks > 8) {
 555                 LOG_INFO(priv, INIT,
 556                          "Reducing transaction to 8 blocks = 2K (from %d)\n",
 557                          priv->dbg.download_trans_blks);
 558                 priv->dbg.download_trans_blks = 8;
 559         }
 560         priv->trans_len = priv->dbg.download_trans_blks * priv->dbg.block_size;
 561         LOG_INFO(priv, INIT, "Transaction length = %d\n", priv->trans_len);
 562
 563         ret = sdio_claim_irq(func, iwmct_irq);
 564         if (ret) {
 565                 LOG_ERROR(priv, INIT, "sdio_claim_irq() failure: %d\n", ret);
 566                 goto error_claim_irq;
 567         }
 568
 569
 570         /* Enable function's interrupt */
 571         sdio_writeb(priv->func, val, addr, &ret);
 572         if (ret) {
 573                 LOG_ERROR(priv, INIT, "Failure writing to "
 574                           "Interrupt Enable Register (%d): %d\n", addr, ret);
 575                 goto error_enable_int;
 576         }
 577
 578         sdio_release_host(func);
 579
 580         LOG_INFO(priv, INIT, "exit iwmct_probe\n");
 581
 582         return ret;
 583
 584 error_enable_int:
 585         sdio_release_irq(func);
 586 error_claim_irq:
 587         sdio_disable_func(func);
 588 error_dev_attrs:
 589         iwmct_dbgfs_unregister(priv->dbgfs);
 590         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 591 error_sdio_enable:
 592         sdio_release_host(func);
 593         return ret;
 594 }
 595
 596 static void iwmct_remove(struct sdio_func *func)
 597 {
 598         struct iwmct_work_struct *read_req;
 599         struct iwmct_priv *priv = sdio_get_drvdata(func);
 600
 601         LOG_INFO(priv, INIT, "enter\n");
 602
 603         sdio_claim_host(func);
 604         sdio_release_irq(func);
 605         sdio_release_host(func);
 606
 607         /* Safely destroy osc workqueue */
 608         destroy_workqueue(priv->bus_rescan_wq);
 609         destroy_workqueue(priv->wq);
 610
 611         sdio_claim_host(func);
 612         sdio_disable_func(func);
 613         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 614         iwmct_dbgfs_unregister(priv->dbgfs);
 615         sdio_release_host(func);
 616
 617         /* free read requests */
 618         while (!list_empty(&priv->read_req_list)) {
 619                 read_req = list_entry(priv->read_req_list.next,
 620                         struct iwmct_work_struct, list);
 621
 622                 list_del(&read_req->list);
 623                 kfree(read_req);
 624         }
 625
 626         kfree(priv);
 627 }
 628
 629
 630 static const struct sdio_device_id iwmct_ids[] = {
 631         /* Intel Wireless MultiCom 3200 Top Driver */
 632         { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1404)},
 633         { },    /* Terminating entry */
 634 };
 635
 636 MODULE_DEVICE_TABLE(sdio, iwmct_ids);
 637
 638 static struct sdio_driver iwmct_driver = {
 639         .probe          = iwmct_probe,
 640         .remove         = iwmct_remove,
 641         .name           = DRV_NAME,
 642         .id_table       = iwmct_ids,
 643 };
 644
 645 static int __init iwmct_init(void)
 646 {
 647         int rc;
 648
 649         /* Default log filter settings */
 650         iwmct_log_set_filter(LOG_SRC_ALL, LOG_SEV_FILTER_RUNTIME);
 651         iwmct_log_set_filter(LOG_SRC_FW_MSG, LOG_SEV_FW_FILTER_ALL);
 652         iwmct_log_set_fw_filter(LOG_SRC_ALL, FW_LOG_SEV_FILTER_RUNTIME);
 653
 654         rc = sdio_register_driver(&iwmct_driver);
 655
 656         return rc;
 657 }
 658
 659 static void __exit iwmct_exit(void)
 660 {
 661         sdio_unregister_driver(&iwmct_driver);
 662 }
 663
 664 module_init(iwmct_init);
 665 module_exit(iwmct_exit);
 666