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/init.h>
  29 #include <linux/kernel.h>
  30 #include <linux/debugfs.h>
  31 #include <linux/mmc/sdio_ids.h>
  32 #include <linux/mmc/sdio_func.h>
  33 #include <linux/mmc/sdio.h>
  34
  35 #include "iwmc3200top.h"
  36 #include "log.h"
  37 #include "fw-msg.h"
  38 #include "debugfs.h"
  39
  40
  41 #define DRIVER_DESCRIPTION "Intel(R) IWMC 3200 Top Driver"
  42 #define DRIVER_COPYRIGHT "Copyright (c) 2008 Intel Corporation."
  43
  44 #define DRIVER_VERSION  "0.1.62"
  45
  46 MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
  47 MODULE_VERSION(DRIVER_VERSION);
  48 MODULE_LICENSE("GPL");
  49 MODULE_AUTHOR(DRIVER_COPYRIGHT);
  50 MODULE_FIRMWARE(FW_NAME(FW_API_VER));
  51
  52 /*
  53  * This workers main task is to wait for OP_OPR_ALIVE
  54  * from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed.
  55  * When OP_OPR_ALIVE received it will issue
  56  * a call to "bus_rescan_devices".
  57  */
  58 static void iwmct_rescan_worker(struct work_struct *ws)
  59 {
  60         struct iwmct_priv *priv;
  61         int ret;
  62
  63         priv = container_of(ws, struct iwmct_priv, bus_rescan_worker);
  64
  65         LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n");
  66
  67         ret = bus_rescan_devices(priv->func->dev.bus);
  68         if (ret < 0)
  69                 LOG_INFO(priv, FW_DOWNLOAD, "bus_rescan_devices FAILED!!!\n");
  70 }
  71
  72 static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg)
  73 {
  74         switch (msg->hdr.opcode) {
  75         case OP_OPR_ALIVE:
  76                 LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n");
  77                 queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker);
  78                 break;
  79         default:
  80                 LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n",
  81                         msg->hdr.opcode);
  82                 break;
  83         }
  84 }
  85
  86
  87 static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len)
  88 {
  89         struct top_msg *msg;
  90
  91         msg = (struct top_msg *)buf;
  92
  93         if (msg->hdr.type != COMM_TYPE_D2H) {
  94                 LOG_ERROR(priv, FW_MSG,
  95                         "Message from TOP with invalid message type 0x%X\n",
  96                         msg->hdr.type);
  97                 return;
  98         }
  99
 100         if (len < sizeof(msg->hdr)) {
 101                 LOG_ERROR(priv, FW_MSG,
 102                         "Message from TOP is too short for message header "
 103                         "received %d bytes, expected at least %zd bytes\n",
 104                         len, sizeof(msg->hdr));
 105                 return;
 106         }
 107
 108         if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) {
 109                 LOG_ERROR(priv, FW_MSG,
 110                         "Message length (%d bytes) is shorter than "
 111                         "in header (%d bytes)\n",
 112                         len, le16_to_cpu(msg->hdr.length));
 113                 return;
 114         }
 115
 116         switch (msg->hdr.category) {
 117         case COMM_CATEGORY_OPERATIONAL:
 118                 op_top_message(priv, (struct top_msg *)buf);
 119                 break;
 120
 121         case COMM_CATEGORY_DEBUG:
 122         case COMM_CATEGORY_TESTABILITY:
 123         case COMM_CATEGORY_DIAGNOSTICS:
 124                 iwmct_log_top_message(priv, buf, len);
 125                 break;
 126
 127         default:
 128                 LOG_ERROR(priv, FW_MSG,
 129                         "Message from TOP with unknown category 0x%X\n",
 130                         msg->hdr.category);
 131                 break;
 132         }
 133 }
 134
 135 int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len)
 136 {
 137         int ret;
 138         u8 *buf;
 139
 140         LOG_INFOEX(priv, FW_MSG, "Sending hcmd:\n");
 141
 142         /* add padding to 256 for IWMC */
 143         ((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256;
 144
 145         LOG_HEXDUMP(FW_MSG, cmd, len);
 146
 147         if (len > FW_HCMD_BLOCK_SIZE) {
 148                 LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n",
 149                           len, FW_HCMD_BLOCK_SIZE);
 150                 return -1;
 151         }
 152
 153         buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL);
 154         if (!buf) {
 155                 LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n",
 156                           FW_HCMD_BLOCK_SIZE);
 157                 return -1;
 158         }
 159
 160         memcpy(buf, cmd, len);
 161
 162         sdio_claim_host(priv->func);
 163         ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, buf,
 164                                FW_HCMD_BLOCK_SIZE);
 165         sdio_release_host(priv->func);
 166
 167         kfree(buf);
 168         return ret;
 169 }
 170
 171 int iwmct_tx(struct iwmct_priv *priv, unsigned int addr,
 172         void *src, int count)
 173 {
 174         int ret;
 175
 176         sdio_claim_host(priv->func);
 177         ret = sdio_memcpy_toio(priv->func, addr, src, count);
 178         sdio_release_host(priv->func);
 179
 180         return ret;
 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_INFO(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 = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR,
 277                                                buf, iosize);
 278                         if (ret) {
 279                                 LOG_ERROR(priv, IRQ,
 280                                          "error %d echoing barker\n", ret);
 281                                 goto exit_release;
 282                         }
 283                         LOG_INFO(priv, IRQ, "Echoing barker to device\n");
 284                         atomic_set(&priv->dev_sync, 1);
 285                         goto exit_release;
 286                 }
 287
 288                 /* Continuing to FW download (without Sync) */
 289                 LOG_INFO(priv, IRQ, "No sync requested "
 290                                     "- starting FW download\n");
 291         }
 292
 293         sdio_release_host(priv->func);
 294
 295
 296         LOG_INFO(priv, IRQ, "barker download request 0x%x is:\n", priv->barker);
 297         LOG_INFO(priv, IRQ, "*******  Top FW %s requested ********\n",
 298                         (priv->barker & BARKER_DNLOAD_TOP_MSK) ? "was" : "not");
 299         LOG_INFO(priv, IRQ, "*******  GPS FW %s requested ********\n",
 300                         (priv->barker & BARKER_DNLOAD_GPS_MSK) ? "was" : "not");
 301         LOG_INFO(priv, IRQ, "*******  BT FW %s requested ********\n",
 302                         (priv->barker & BARKER_DNLOAD_BT_MSK) ? "was" : "not");
 303
 304         if (priv->dbg.fw_download)
 305                 iwmct_fw_load(priv);
 306         else
 307                 LOG_ERROR(priv, IRQ, "FW download not allowed\n");
 308
 309         goto exit;
 310
 311 exit_release:
 312         sdio_release_host(priv->func);
 313 exit:
 314         kfree(buf);
 315         LOG_INFO(priv, IRQ, "exit iwmct_irq_read_worker\n");
 316 }
 317
 318 static void iwmct_irq(struct sdio_func *func)
 319 {
 320         struct iwmct_priv *priv;
 321         int val, ret;
 322         int iosize;
 323         int addr = IWMC_SDIO_INTR_GET_SIZE_ADDR;
 324         struct iwmct_work_struct *read_req;
 325
 326         priv = sdio_get_drvdata(func);
 327
 328         LOG_INFO(priv, IRQ, "enter iwmct_irq\n");
 329
 330         /* read the function's status register */
 331         val = sdio_readb(func, IWMC_SDIO_INTR_STATUS_ADDR, &ret);
 332
 333         LOG_INFO(priv, IRQ, "iir value = %d, ret=%d\n", val, ret);
 334
 335         if (!val) {
 336                 LOG_ERROR(priv, IRQ, "iir = 0, exiting ISR\n");
 337                 goto exit_clear_intr;
 338         }
 339
 340
 341         /*
 342          * read 2 bytes of the transaction size
 343          * IMPORTANT: sdio transaction size has to be read before clearing
 344          * sdio interrupt!!!
 345          */
 346         val = sdio_readb(priv->func, addr++, &ret);
 347         iosize = val;
 348         val = sdio_readb(priv->func, addr++, &ret);
 349         iosize += val << 8;
 350
 351         LOG_INFO(priv, IRQ, "READ size %d\n", iosize);
 352
 353         if (iosize == 0) {
 354                 LOG_ERROR(priv, IRQ, "READ size %d, exiting ISR\n", iosize);
 355                 goto exit_clear_intr;
 356         }
 357
 358         /* allocate a work structure to pass iosize to the worker */
 359         read_req = kzalloc(sizeof(struct iwmct_work_struct), GFP_KERNEL);
 360         if (!read_req) {
 361                 LOG_ERROR(priv, IRQ, "failed to allocate read_req, exit ISR\n");
 362                 goto exit_clear_intr;
 363         }
 364
 365         INIT_LIST_HEAD(&read_req->list);
 366         read_req->iosize = iosize;
 367
 368         list_add_tail(&priv->read_req_list, &read_req->list);
 369
 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         queue_work(priv->wq, &priv->isr_worker);
 374
 375         LOG_INFO(priv, IRQ, "exit iwmct_irq\n");
 376
 377         return;
 378
 379 exit_clear_intr:
 380         /* clear the function's interrupt request bit (write 1 to clear) */
 381         sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
 382 }
 383
 384
 385 static int blocks;
 386 module_param(blocks, int, 0604);
 387 MODULE_PARM_DESC(blocks, "max_blocks_to_send");
 388
 389 static int dump;
 390 module_param(dump, bool, 0604);
 391 MODULE_PARM_DESC(dump, "dump_hex_content");
 392
 393 static int jump = 1;
 394 module_param(jump, bool, 0604);
 395
 396 static int direct = 1;
 397 module_param(direct, bool, 0604);
 398
 399 static int checksum = 1;
 400 module_param(checksum, bool, 0604);
 401
 402 static int fw_download = 1;
 403 module_param(fw_download, bool, 0604);
 404
 405 static int block_size = IWMC_SDIO_BLK_SIZE;
 406 module_param(block_size, int, 0404);
 407
 408 static int download_trans_blks = IWMC_DEFAULT_TR_BLK;
 409 module_param(download_trans_blks, int, 0604);
 410
 411 static int rubbish_barker;
 412 module_param(rubbish_barker, bool, 0604);
 413
 414 #ifdef CONFIG_IWMC3200TOP_DEBUG
 415 static int log_level[LOG_SRC_MAX];
 416 static unsigned int log_level_argc;
 417 module_param_array(log_level, int, &log_level_argc, 0604);
 418 MODULE_PARM_DESC(log_level, "log_level");
 419
 420 static int log_level_fw[FW_LOG_SRC_MAX];
 421 static unsigned int log_level_fw_argc;
 422 module_param_array(log_level_fw, int, &log_level_fw_argc, 0604);
 423 MODULE_PARM_DESC(log_level_fw, "log_level_fw");
 424 #endif
 425
 426 void iwmct_dbg_init_params(struct iwmct_priv *priv)
 427 {
 428 #ifdef CONFIG_IWMC3200TOP_DEBUG
 429         int i;
 430
 431         for (i = 0; i < log_level_argc; i++) {
 432                 dev_notice(&priv->func->dev, "log_level[%d]=0x%X\n",
 433                                                 i, log_level[i]);
 434                 iwmct_log_set_filter((log_level[i] >> 8) & 0xFF,
 435                                log_level[i] & 0xFF);
 436         }
 437         for (i = 0; i < log_level_fw_argc; i++) {
 438                 dev_notice(&priv->func->dev, "log_level_fw[%d]=0x%X\n",
 439                                                 i, log_level_fw[i]);
 440                 iwmct_log_set_fw_filter((log_level_fw[i] >> 8) & 0xFF,
 441                                   log_level_fw[i] & 0xFF);
 442         }
 443 #endif
 444
 445         priv->dbg.blocks = blocks;
 446         LOG_INFO(priv, INIT, "blocks=%d\n", blocks);
 447         priv->dbg.dump = (bool)dump;
 448         LOG_INFO(priv, INIT, "dump=%d\n", dump);
 449         priv->dbg.jump = (bool)jump;
 450         LOG_INFO(priv, INIT, "jump=%d\n", jump);
 451         priv->dbg.direct = (bool)direct;
 452         LOG_INFO(priv, INIT, "direct=%d\n", direct);
 453         priv->dbg.checksum = (bool)checksum;
 454         LOG_INFO(priv, INIT, "checksum=%d\n", checksum);
 455         priv->dbg.fw_download = (bool)fw_download;
 456         LOG_INFO(priv, INIT, "fw_download=%d\n", fw_download);
 457         priv->dbg.block_size = block_size;
 458         LOG_INFO(priv, INIT, "block_size=%d\n", block_size);
 459         priv->dbg.download_trans_blks = download_trans_blks;
 460         LOG_INFO(priv, INIT, "download_trans_blks=%d\n", download_trans_blks);
 461 }
 462
 463 /*****************************************************************************
 464  *
 465  * sysfs attributes
 466  *
 467  *****************************************************************************/
 468 static ssize_t show_iwmct_fw_version(struct device *d,
 469                                   struct device_attribute *attr, char *buf)
 470 {
 471         struct iwmct_priv *priv = dev_get_drvdata(d);
 472         return sprintf(buf, "%s\n", priv->dbg.label_fw);
 473 }
 474 static DEVICE_ATTR(cc_label_fw, S_IRUGO, show_iwmct_fw_version, NULL);
 475
 476 #ifdef CONFIG_IWMC3200TOP_DEBUG
 477 static DEVICE_ATTR(log_level, S_IWUSR | S_IRUGO,
 478                    show_iwmct_log_level, store_iwmct_log_level);
 479 static DEVICE_ATTR(log_level_fw, S_IWUSR | S_IRUGO,
 480                    show_iwmct_log_level_fw, store_iwmct_log_level_fw);
 481 #endif
 482
 483 static struct attribute *iwmct_sysfs_entries[] = {
 484         &dev_attr_cc_label_fw.attr,
 485 #ifdef CONFIG_IWMC3200TOP_DEBUG
 486         &dev_attr_log_level.attr,
 487         &dev_attr_log_level_fw.attr,
 488 #endif
 489         NULL
 490 };
 491
 492 static struct attribute_group iwmct_attribute_group = {
 493         .name = NULL,           /* put in device directory */
 494         .attrs = iwmct_sysfs_entries,
 495 };
 496
 497
 498 static int iwmct_probe(struct sdio_func *func,
 499                            const struct sdio_device_id *id)
 500 {
 501         struct iwmct_priv *priv;
 502         int ret;
 503         int val = 1;
 504         int addr = IWMC_SDIO_INTR_ENABLE_ADDR;
 505
 506         dev_dbg(&func->dev, "enter iwmct_probe\n");
 507
 508         dev_dbg(&func->dev, "IRQ polling period id %u msecs, HZ is %d\n",
 509                 jiffies_to_msecs(2147483647), HZ);
 510
 511         priv = kzalloc(sizeof(struct iwmct_priv), GFP_KERNEL);
 512         if (!priv) {
 513                 dev_err(&func->dev, "kzalloc error\n");
 514                 return -ENOMEM;
 515         }
 516         priv->func = func;
 517         sdio_set_drvdata(func, priv);
 518
 519
 520         /* create drivers work queue */
 521         priv->wq = create_workqueue(DRV_NAME "_wq");
 522         priv->bus_rescan_wq = create_workqueue(DRV_NAME "_rescan_wq");
 523         INIT_WORK(&priv->bus_rescan_worker, iwmct_rescan_worker);
 524         INIT_WORK(&priv->isr_worker, iwmct_irq_read_worker);
 525
 526         init_waitqueue_head(&priv->wait_q);
 527
 528         sdio_claim_host(func);
 529         /* FIXME: Remove after it is fixed in the Boot ROM upgrade */
 530         func->enable_timeout = 10;
 531
 532         /* In our HW, setting the block size also wakes up the boot rom. */
 533         ret = sdio_set_block_size(func, priv->dbg.block_size);
 534         if (ret) {
 535                 LOG_ERROR(priv, INIT,
 536                         "sdio_set_block_size() failure: %d\n", ret);
 537                 goto error_sdio_enable;
 538         }
 539
 540         ret = sdio_enable_func(func);
 541         if (ret) {
 542                 LOG_ERROR(priv, INIT, "sdio_enable_func() failure: %d\n", ret);
 543                 goto error_sdio_enable;
 544         }
 545
 546         /* init reset and dev_sync states */
 547         atomic_set(&priv->reset, 0);
 548         atomic_set(&priv->dev_sync, 0);
 549
 550         /* init read req queue */
 551         INIT_LIST_HEAD(&priv->read_req_list);
 552
 553         /* process configurable parameters */
 554         iwmct_dbg_init_params(priv);
 555         ret = sysfs_create_group(&func->dev.kobj, &iwmct_attribute_group);
 556         if (ret) {
 557                 LOG_ERROR(priv, INIT, "Failed to register attributes and "
 558                          "initialize module_params\n");
 559                 goto error_dev_attrs;
 560         }
 561
 562         iwmct_dbgfs_register(priv, DRV_NAME);
 563
 564         if (!priv->dbg.direct && priv->dbg.download_trans_blks > 8) {
 565                 LOG_INFO(priv, INIT,
 566                          "Reducing transaction to 8 blocks = 2K (from %d)\n",
 567                          priv->dbg.download_trans_blks);
 568                 priv->dbg.download_trans_blks = 8;
 569         }
 570         priv->trans_len = priv->dbg.download_trans_blks * priv->dbg.block_size;
 571         LOG_INFO(priv, INIT, "Transaction length = %d\n", priv->trans_len);
 572
 573         ret = sdio_claim_irq(func, iwmct_irq);
 574         if (ret) {
 575                 LOG_ERROR(priv, INIT, "sdio_claim_irq() failure: %d\n", ret);
 576                 goto error_claim_irq;
 577         }
 578
 579
 580         /* Enable function's interrupt */
 581         sdio_writeb(priv->func, val, addr, &ret);
 582         if (ret) {
 583                 LOG_ERROR(priv, INIT, "Failure writing to "
 584                           "Interrupt Enable Register (%d): %d\n", addr, ret);
 585                 goto error_enable_int;
 586         }
 587
 588         sdio_release_host(func);
 589
 590         LOG_INFO(priv, INIT, "exit iwmct_probe\n");
 591
 592         return ret;
 593
 594 error_enable_int:
 595         sdio_release_irq(func);
 596 error_claim_irq:
 597         sdio_disable_func(func);
 598 error_dev_attrs:
 599         iwmct_dbgfs_unregister(priv->dbgfs);
 600         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 601 error_sdio_enable:
 602         sdio_release_host(func);
 603         return ret;
 604 }
 605
 606 static void iwmct_remove(struct sdio_func *func)
 607 {
 608         struct iwmct_work_struct *read_req;
 609         struct iwmct_priv *priv = sdio_get_drvdata(func);
 610
 611         priv = sdio_get_drvdata(func);
 612
 613         LOG_INFO(priv, INIT, "enter\n");
 614
 615         sdio_claim_host(func);
 616         sdio_release_irq(func);
 617         sdio_release_host(func);
 618
 619         /* Safely destroy osc workqueue */
 620         destroy_workqueue(priv->bus_rescan_wq);
 621         destroy_workqueue(priv->wq);
 622
 623         sdio_claim_host(func);
 624         sdio_disable_func(func);
 625         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 626         iwmct_dbgfs_unregister(priv->dbgfs);
 627         sdio_release_host(func);
 628
 629         /* free read requests */
 630         while (!list_empty(&priv->read_req_list)) {
 631                 read_req = list_entry(priv->read_req_list.next,
 632                         struct iwmct_work_struct, list);
 633
 634                 list_del(&read_req->list);
 635                 kfree(read_req);
 636         }
 637
 638         kfree(priv);
 639 }
 640
 641
 642 static const struct sdio_device_id iwmct_ids[] = {
 643         /* Intel Wireless MultiCom 3200 Top Driver */
 644         { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1404)},
 645         { },    /* Terminating entry */
 646 };
 647
 648 MODULE_DEVICE_TABLE(sdio, iwmct_ids);
 649
 650 static struct sdio_driver iwmct_driver = {
 651         .probe          = iwmct_probe,
 652         .remove         = iwmct_remove,
 653         .name           = DRV_NAME,
 654         .id_table       = iwmct_ids,
 655 };
 656
 657 static int __init iwmct_init(void)
 658 {
 659         int rc;
 660
 661         /* Default log filter settings */
 662         iwmct_log_set_filter(LOG_SRC_ALL, LOG_SEV_FILTER_RUNTIME);
 663         iwmct_log_set_filter(LOG_SRC_FW_MSG, LOG_SEV_FILTER_ALL);
 664         iwmct_log_set_fw_filter(LOG_SRC_ALL, FW_LOG_SEV_FILTER_RUNTIME);
 665
 666         rc = sdio_register_driver(&iwmct_driver);
 667
 668         return rc;
 669 }
 670
 671 static void __exit iwmct_exit(void)
 672 {
 673         sdio_unregister_driver(&iwmct_driver);
 674 }
 675
 676 module_init(iwmct_init);
 677 module_exit(iwmct_exit);
 678