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 IWMCT_VERSION "0.1.62"
  45
  46 #ifdef REPOSITORY_LABEL
  47 #define RL REPOSITORY_LABEL
  48 #else
  49 #define RL local
  50 #endif
  51
  52 #ifdef CONFIG_IWMC3200TOP_DEBUG
  53 #define VD "-d"
  54 #else
  55 #define VD
  56 #endif
  57
  58 #define DRIVER_VERSION IWMCT_VERSION "-"  __stringify(RL) VD
  59
  60 MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
  61 MODULE_VERSION(DRIVER_VERSION);
  62 MODULE_LICENSE("GPL");
  63 MODULE_AUTHOR(DRIVER_COPYRIGHT);
  64
  65 /*
  66  * This workers main task is to wait for OP_OPR_ALIVE
  67  * from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed.
  68  * When OP_OPR_ALIVE received it will issue
  69  * a call to "bus_rescan_devices".
  70  */
  71 static void iwmct_rescan_worker(struct work_struct *ws)
  72 {
  73         struct iwmct_priv *priv;
  74         int ret;
  75
  76         priv = container_of(ws, struct iwmct_priv, bus_rescan_worker);
  77
  78         LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n");
  79
  80         ret = bus_rescan_devices(priv->func->dev.bus);
  81         if (ret < 0)
  82                 LOG_INFO(priv, FW_DOWNLOAD, "bus_rescan_devices FAILED!!!\n");
  83 }
  84
  85 static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg)
  86 {
  87         switch (msg->hdr.opcode) {
  88         case OP_OPR_ALIVE:
  89                 LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n");
  90                 queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker);
  91                 break;
  92         default:
  93                 LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n",
  94                         msg->hdr.opcode);
  95                 break;
  96         }
  97 }
  98
  99
 100 static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len)
 101 {
 102         struct top_msg *msg;
 103
 104         msg = (struct top_msg *)buf;
 105
 106         if (msg->hdr.type != COMM_TYPE_D2H) {
 107                 LOG_ERROR(priv, FW_MSG,
 108                         "Message from TOP with invalid message type 0x%X\n",
 109                         msg->hdr.type);
 110                 return;
 111         }
 112
 113         if (len < sizeof(msg->hdr)) {
 114                 LOG_ERROR(priv, FW_MSG,
 115                         "Message from TOP is too short for message header "
 116                         "received %d bytes, expected at least %zd bytes\n",
 117                         len, sizeof(msg->hdr));
 118                 return;
 119         }
 120
 121         if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) {
 122                 LOG_ERROR(priv, FW_MSG,
 123                         "Message length (%d bytes) is shorter than "
 124                         "in header (%d bytes)\n",
 125                         len, le16_to_cpu(msg->hdr.length));
 126                 return;
 127         }
 128
 129         switch (msg->hdr.category) {
 130         case COMM_CATEGORY_OPERATIONAL:
 131                 op_top_message(priv, (struct top_msg *)buf);
 132                 break;
 133
 134         case COMM_CATEGORY_DEBUG:
 135         case COMM_CATEGORY_TESTABILITY:
 136         case COMM_CATEGORY_DIAGNOSTICS:
 137                 iwmct_log_top_message(priv, buf, len);
 138                 break;
 139
 140         default:
 141                 LOG_ERROR(priv, FW_MSG,
 142                         "Message from TOP with unknown category 0x%X\n",
 143                         msg->hdr.category);
 144                 break;
 145         }
 146 }
 147
 148 int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len)
 149 {
 150         int ret;
 151         u8 *buf;
 152
 153         LOG_INFOEX(priv, FW_MSG, "Sending hcmd:\n");
 154
 155         /* add padding to 256 for IWMC */
 156         ((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256;
 157
 158         LOG_HEXDUMP(FW_MSG, cmd, len);
 159
 160         if (len > FW_HCMD_BLOCK_SIZE) {
 161                 LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n",
 162                           len, FW_HCMD_BLOCK_SIZE);
 163                 return -1;
 164         }
 165
 166         buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL);
 167         if (!buf) {
 168                 LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n",
 169                           FW_HCMD_BLOCK_SIZE);
 170                 return -1;
 171         }
 172
 173         memcpy(buf, cmd, len);
 174
 175         sdio_claim_host(priv->func);
 176         ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, buf,
 177                                FW_HCMD_BLOCK_SIZE);
 178         sdio_release_host(priv->func);
 179
 180         kfree(buf);
 181         return ret;
 182 }
 183
 184 int iwmct_tx(struct iwmct_priv *priv, unsigned int addr,
 185         void *src, int count)
 186 {
 187         int ret;
 188
 189         sdio_claim_host(priv->func);
 190         ret = sdio_memcpy_toio(priv->func, addr, src, count);
 191         sdio_release_host(priv->func);
 192
 193         return ret;
 194 }
 195
 196 static void iwmct_irq_read_worker(struct work_struct *ws)
 197 {
 198         struct iwmct_priv *priv;
 199         struct iwmct_work_struct *read_req;
 200         __le32 *buf = NULL;
 201         int ret;
 202         int iosize;
 203         u32 barker;
 204         bool is_barker;
 205
 206         priv = container_of(ws, struct iwmct_priv, isr_worker);
 207
 208         LOG_INFO(priv, IRQ, "enter iwmct_irq_read_worker %p\n", ws);
 209
 210         /* --------------------- Handshake with device -------------------- */
 211         sdio_claim_host(priv->func);
 212
 213         /* all list manipulations have to be protected by
 214          * sdio_claim_host/sdio_release_host */
 215         if (list_empty(&priv->read_req_list)) {
 216                 LOG_ERROR(priv, IRQ, "read_req_list empty in read worker\n");
 217                 goto exit_release;
 218         }
 219
 220         read_req = list_entry(priv->read_req_list.next,
 221                               struct iwmct_work_struct, list);
 222
 223         list_del(&read_req->list);
 224         iosize = read_req->iosize;
 225         kfree(read_req);
 226
 227         buf = kzalloc(iosize, GFP_KERNEL);
 228         if (!buf) {
 229                 LOG_ERROR(priv, IRQ, "kzalloc error, buf size %d\n", iosize);
 230                 goto exit_release;
 231         }
 232
 233         LOG_INFO(priv, IRQ, "iosize=%d, buf=%p, func=%d\n",
 234                                 iosize, buf, priv->func->num);
 235
 236         /* read from device */
 237         ret = sdio_memcpy_fromio(priv->func, buf, IWMC_SDIO_DATA_ADDR, iosize);
 238         if (ret) {
 239                 LOG_ERROR(priv, IRQ, "error %d reading buffer\n", ret);
 240                 goto exit_release;
 241         }
 242
 243         LOG_HEXDUMP(IRQ, (u8 *)buf, iosize);
 244
 245         barker = le32_to_cpu(buf[0]);
 246
 247         /* Verify whether it's a barker and if not - treat as regular Rx */
 248         if (barker == IWMC_BARKER_ACK ||
 249             (barker & BARKER_DNLOAD_BARKER_MSK) == IWMC_BARKER_REBOOT) {
 250
 251                 /* Valid Barker is equal on first 4 dwords */
 252                 is_barker = (buf[1] == buf[0]) &&
 253                             (buf[2] == buf[0]) &&
 254                             (buf[3] == buf[0]);
 255
 256                 if (!is_barker) {
 257                         LOG_WARNING(priv, IRQ,
 258                                 "Potentially inconsistent barker "
 259                                 "%08X_%08X_%08X_%08X\n",
 260                                 le32_to_cpu(buf[0]), le32_to_cpu(buf[1]),
 261                                 le32_to_cpu(buf[2]), le32_to_cpu(buf[3]));
 262                 }
 263         } else {
 264                 is_barker = false;
 265         }
 266
 267         /* Handle Top CommHub message */
 268         if (!is_barker) {
 269                 sdio_release_host(priv->func);
 270                 handle_top_message(priv, (u8 *)buf, iosize);
 271                 goto exit;
 272         } else if (barker == IWMC_BARKER_ACK) { /* Handle barkers */
 273                 if (atomic_read(&priv->dev_sync) == 0) {
 274                         LOG_ERROR(priv, IRQ,
 275                                   "ACK barker arrived out-of-sync\n");
 276                         goto exit_release;
 277                 }
 278
 279                 /* Continuing to FW download (after Sync is completed)*/
 280                 atomic_set(&priv->dev_sync, 0);
 281                 LOG_INFO(priv, IRQ, "ACK barker arrived "
 282                                 "- starting FW download\n");
 283         } else { /* REBOOT barker */
 284                 LOG_INFO(priv, IRQ, "Recieved reboot barker: %x\n", barker);
 285                 priv->barker = barker;
 286
 287                 if (barker & BARKER_DNLOAD_SYNC_MSK) {
 288                         /* Send the same barker back */
 289                         ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR,
 290                                                buf, iosize);
 291                         if (ret) {
 292                                 LOG_ERROR(priv, IRQ,
 293                                          "error %d echoing barker\n", ret);
 294                                 goto exit_release;
 295                         }
 296                         LOG_INFO(priv, IRQ, "Echoing barker to device\n");
 297                         atomic_set(&priv->dev_sync, 1);
 298                         goto exit_release;
 299                 }
 300
 301                 /* Continuing to FW download (without Sync) */
 302                 LOG_INFO(priv, IRQ, "No sync requested "
 303                                     "- starting FW download\n");
 304         }
 305
 306         sdio_release_host(priv->func);
 307
 308
 309         LOG_INFO(priv, IRQ, "barker download request 0x%x is:\n", priv->barker);
 310         LOG_INFO(priv, IRQ, "*******  Top FW %s requested ********\n",
 311                         (priv->barker & BARKER_DNLOAD_TOP_MSK) ? "was" : "not");
 312         LOG_INFO(priv, IRQ, "*******  GPS FW %s requested ********\n",
 313                         (priv->barker & BARKER_DNLOAD_GPS_MSK) ? "was" : "not");
 314         LOG_INFO(priv, IRQ, "*******  BT FW %s requested ********\n",
 315                         (priv->barker & BARKER_DNLOAD_BT_MSK) ? "was" : "not");
 316
 317         if (priv->dbg.fw_download)
 318                 iwmct_fw_load(priv);
 319         else
 320                 LOG_ERROR(priv, IRQ, "FW download not allowed\n");
 321
 322         goto exit;
 323
 324 exit_release:
 325         sdio_release_host(priv->func);
 326 exit:
 327         kfree(buf);
 328         LOG_INFO(priv, IRQ, "exit iwmct_irq_read_worker\n");
 329 }
 330
 331 static void iwmct_irq(struct sdio_func *func)
 332 {
 333         struct iwmct_priv *priv;
 334         int val, ret;
 335         int iosize;
 336         int addr = IWMC_SDIO_INTR_GET_SIZE_ADDR;
 337         struct iwmct_work_struct *read_req;
 338
 339         priv = sdio_get_drvdata(func);
 340
 341         LOG_INFO(priv, IRQ, "enter iwmct_irq\n");
 342
 343         /* read the function's status register */
 344         val = sdio_readb(func, IWMC_SDIO_INTR_STATUS_ADDR, &ret);
 345
 346         LOG_INFO(priv, IRQ, "iir value = %d, ret=%d\n", val, ret);
 347
 348         if (!val) {
 349                 LOG_ERROR(priv, IRQ, "iir = 0, exiting ISR\n");
 350                 goto exit_clear_intr;
 351         }
 352
 353
 354         /*
 355          * read 2 bytes of the transaction size
 356          * IMPORTANT: sdio transaction size has to be read before clearing
 357          * sdio interrupt!!!
 358          */
 359         val = sdio_readb(priv->func, addr++, &ret);
 360         iosize = val;
 361         val = sdio_readb(priv->func, addr++, &ret);
 362         iosize += val << 8;
 363
 364         LOG_INFO(priv, IRQ, "READ size %d\n", iosize);
 365
 366         if (iosize == 0) {
 367                 LOG_ERROR(priv, IRQ, "READ size %d, exiting ISR\n", iosize);
 368                 goto exit_clear_intr;
 369         }
 370
 371         /* allocate a work structure to pass iosize to the worker */
 372         read_req = kzalloc(sizeof(struct iwmct_work_struct), GFP_KERNEL);
 373         if (!read_req) {
 374                 LOG_ERROR(priv, IRQ, "failed to allocate read_req, exit ISR\n");
 375                 goto exit_clear_intr;
 376         }
 377
 378         INIT_LIST_HEAD(&read_req->list);
 379         read_req->iosize = iosize;
 380
 381         list_add_tail(&priv->read_req_list, &read_req->list);
 382
 383         /* clear the function's interrupt request bit (write 1 to clear) */
 384         sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
 385
 386         queue_work(priv->wq, &priv->isr_worker);
 387
 388         LOG_INFO(priv, IRQ, "exit iwmct_irq\n");
 389
 390         return;
 391
 392 exit_clear_intr:
 393         /* clear the function's interrupt request bit (write 1 to clear) */
 394         sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
 395 }
 396
 397
 398 static int blocks;
 399 module_param(blocks, int, 0604);
 400 MODULE_PARM_DESC(blocks, "max_blocks_to_send");
 401
 402 static int dump;
 403 module_param(dump, bool, 0604);
 404 MODULE_PARM_DESC(dump, "dump_hex_content");
 405
 406 static int jump = 1;
 407 module_param(jump, bool, 0604);
 408
 409 static int direct = 1;
 410 module_param(direct, bool, 0604);
 411
 412 static int checksum = 1;
 413 module_param(checksum, bool, 0604);
 414
 415 static int fw_download = 1;
 416 module_param(fw_download, bool, 0604);
 417
 418 static int block_size = IWMC_SDIO_BLK_SIZE;
 419 module_param(block_size, int, 0404);
 420
 421 static int download_trans_blks = IWMC_DEFAULT_TR_BLK;
 422 module_param(download_trans_blks, int, 0604);
 423
 424 static int rubbish_barker;
 425 module_param(rubbish_barker, bool, 0604);
 426
 427 #ifdef CONFIG_IWMC3200TOP_DEBUG
 428 static int log_level[LOG_SRC_MAX];
 429 static unsigned int log_level_argc;
 430 module_param_array(log_level, int, &log_level_argc, 0604);
 431 MODULE_PARM_DESC(log_level, "log_level");
 432
 433 static int log_level_fw[FW_LOG_SRC_MAX];
 434 static unsigned int log_level_fw_argc;
 435 module_param_array(log_level_fw, int, &log_level_fw_argc, 0604);
 436 MODULE_PARM_DESC(log_level_fw, "log_level_fw");
 437 #endif
 438
 439 void iwmct_dbg_init_params(struct iwmct_priv *priv)
 440 {
 441 #ifdef CONFIG_IWMC3200TOP_DEBUG
 442         int i;
 443
 444         for (i = 0; i < log_level_argc; i++) {
 445                 dev_notice(&priv->func->dev, "log_level[%d]=0x%X\n",
 446                                                 i, log_level[i]);
 447                 iwmct_log_set_filter((log_level[i] >> 8) & 0xFF,
 448                                log_level[i] & 0xFF);
 449         }
 450         for (i = 0; i < log_level_fw_argc; i++) {
 451                 dev_notice(&priv->func->dev, "log_level_fw[%d]=0x%X\n",
 452                                                 i, log_level_fw[i]);
 453                 iwmct_log_set_fw_filter((log_level_fw[i] >> 8) & 0xFF,
 454                                   log_level_fw[i] & 0xFF);
 455         }
 456 #endif
 457
 458         priv->dbg.blocks = blocks;
 459         LOG_INFO(priv, INIT, "blocks=%d\n", blocks);
 460         priv->dbg.dump = (bool)dump;
 461         LOG_INFO(priv, INIT, "dump=%d\n", dump);
 462         priv->dbg.jump = (bool)jump;
 463         LOG_INFO(priv, INIT, "jump=%d\n", jump);
 464         priv->dbg.direct = (bool)direct;
 465         LOG_INFO(priv, INIT, "direct=%d\n", direct);
 466         priv->dbg.checksum = (bool)checksum;
 467         LOG_INFO(priv, INIT, "checksum=%d\n", checksum);
 468         priv->dbg.fw_download = (bool)fw_download;
 469         LOG_INFO(priv, INIT, "fw_download=%d\n", fw_download);
 470         priv->dbg.block_size = block_size;
 471         LOG_INFO(priv, INIT, "block_size=%d\n", block_size);
 472         priv->dbg.download_trans_blks = download_trans_blks;
 473         LOG_INFO(priv, INIT, "download_trans_blks=%d\n", download_trans_blks);
 474 }
 475
 476 /*****************************************************************************
 477  *
 478  * sysfs attributes
 479  *
 480  *****************************************************************************/
 481 static ssize_t show_iwmct_fw_version(struct device *d,
 482                                   struct device_attribute *attr, char *buf)
 483 {
 484         struct iwmct_priv *priv = dev_get_drvdata(d);
 485         return sprintf(buf, "%s\n", priv->dbg.label_fw);
 486 }
 487 static DEVICE_ATTR(cc_label_fw, S_IRUGO, show_iwmct_fw_version, NULL);
 488
 489 #ifdef CONFIG_IWMC3200TOP_DEBUG
 490 static DEVICE_ATTR(log_level, S_IWUSR | S_IRUGO,
 491                    show_iwmct_log_level, store_iwmct_log_level);
 492 static DEVICE_ATTR(log_level_fw, S_IWUSR | S_IRUGO,
 493                    show_iwmct_log_level_fw, store_iwmct_log_level_fw);
 494 #endif
 495
 496 static struct attribute *iwmct_sysfs_entries[] = {
 497         &dev_attr_cc_label_fw.attr,
 498 #ifdef CONFIG_IWMC3200TOP_DEBUG
 499         &dev_attr_log_level.attr,
 500         &dev_attr_log_level_fw.attr,
 501 #endif
 502         NULL
 503 };
 504
 505 static struct attribute_group iwmct_attribute_group = {
 506         .name = NULL,           /* put in device directory */
 507         .attrs = iwmct_sysfs_entries,
 508 };
 509
 510
 511 static int iwmct_probe(struct sdio_func *func,
 512                            const struct sdio_device_id *id)
 513 {
 514         struct iwmct_priv *priv;
 515         int ret;
 516         int val = 1;
 517         int addr = IWMC_SDIO_INTR_ENABLE_ADDR;
 518
 519         dev_dbg(&func->dev, "enter iwmct_probe\n");
 520
 521         dev_dbg(&func->dev, "IRQ polling period id %u msecs, HZ is %d\n",
 522                 jiffies_to_msecs(2147483647), HZ);
 523
 524         priv = kzalloc(sizeof(struct iwmct_priv), GFP_KERNEL);
 525         if (!priv) {
 526                 dev_err(&func->dev, "kzalloc error\n");
 527                 return -ENOMEM;
 528         }
 529         priv->func = func;
 530         sdio_set_drvdata(func, priv);
 531
 532
 533         /* create drivers work queue */
 534         priv->wq = create_workqueue(DRV_NAME "_wq");
 535         priv->bus_rescan_wq = create_workqueue(DRV_NAME "_rescan_wq");
 536         INIT_WORK(&priv->bus_rescan_worker, iwmct_rescan_worker);
 537         INIT_WORK(&priv->isr_worker, iwmct_irq_read_worker);
 538
 539         init_waitqueue_head(&priv->wait_q);
 540
 541         sdio_claim_host(func);
 542         /* FIXME: Remove after it is fixed in the Boot ROM upgrade */
 543         func->enable_timeout = 10;
 544
 545         /* In our HW, setting the block size also wakes up the boot rom. */
 546         ret = sdio_set_block_size(func, priv->dbg.block_size);
 547         if (ret) {
 548                 LOG_ERROR(priv, INIT,
 549                         "sdio_set_block_size() failure: %d\n", ret);
 550                 goto error_sdio_enable;
 551         }
 552
 553         ret = sdio_enable_func(func);
 554         if (ret) {
 555                 LOG_ERROR(priv, INIT, "sdio_enable_func() failure: %d\n", ret);
 556                 goto error_sdio_enable;
 557         }
 558
 559         /* init reset and dev_sync states */
 560         atomic_set(&priv->reset, 0);
 561         atomic_set(&priv->dev_sync, 0);
 562
 563         /* init read req queue */
 564         INIT_LIST_HEAD(&priv->read_req_list);
 565
 566         /* process configurable parameters */
 567         iwmct_dbg_init_params(priv);
 568         ret = sysfs_create_group(&func->dev.kobj, &iwmct_attribute_group);
 569         if (ret) {
 570                 LOG_ERROR(priv, INIT, "Failed to register attributes and "
 571                          "initialize module_params\n");
 572                 goto error_dev_attrs;
 573         }
 574
 575         iwmct_dbgfs_register(priv, DRV_NAME);
 576
 577         if (!priv->dbg.direct && priv->dbg.download_trans_blks > 8) {
 578                 LOG_INFO(priv, INIT,
 579                          "Reducing transaction to 8 blocks = 2K (from %d)\n",
 580                          priv->dbg.download_trans_blks);
 581                 priv->dbg.download_trans_blks = 8;
 582         }
 583         priv->trans_len = priv->dbg.download_trans_blks * priv->dbg.block_size;
 584         LOG_INFO(priv, INIT, "Transaction length = %d\n", priv->trans_len);
 585
 586         ret = sdio_claim_irq(func, iwmct_irq);
 587         if (ret) {
 588                 LOG_ERROR(priv, INIT, "sdio_claim_irq() failure: %d\n", ret);
 589                 goto error_claim_irq;
 590         }
 591
 592
 593         /* Enable function's interrupt */
 594         sdio_writeb(priv->func, val, addr, &ret);
 595         if (ret) {
 596                 LOG_ERROR(priv, INIT, "Failure writing to "
 597                           "Interrupt Enable Register (%d): %d\n", addr, ret);
 598                 goto error_enable_int;
 599         }
 600
 601         sdio_release_host(func);
 602
 603         LOG_INFO(priv, INIT, "exit iwmct_probe\n");
 604
 605         return ret;
 606
 607 error_enable_int:
 608         sdio_release_irq(func);
 609 error_claim_irq:
 610         sdio_disable_func(func);
 611 error_dev_attrs:
 612         iwmct_dbgfs_unregister(priv->dbgfs);
 613         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 614 error_sdio_enable:
 615         sdio_release_host(func);
 616         return ret;
 617 }
 618
 619 static void iwmct_remove(struct sdio_func *func)
 620 {
 621         struct iwmct_work_struct *read_req;
 622         struct iwmct_priv *priv = sdio_get_drvdata(func);
 623
 624         priv = sdio_get_drvdata(func);
 625
 626         LOG_INFO(priv, INIT, "enter\n");
 627
 628         sdio_claim_host(func);
 629         sdio_release_irq(func);
 630         sdio_release_host(func);
 631
 632         /* Safely destroy osc workqueue */
 633         destroy_workqueue(priv->bus_rescan_wq);
 634         destroy_workqueue(priv->wq);
 635
 636         sdio_claim_host(func);
 637         sdio_disable_func(func);
 638         sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
 639         iwmct_dbgfs_unregister(priv->dbgfs);
 640         sdio_release_host(func);
 641
 642         /* free read requests */
 643         while (!list_empty(&priv->read_req_list)) {
 644                 read_req = list_entry(priv->read_req_list.next,
 645                         struct iwmct_work_struct, list);
 646
 647                 list_del(&read_req->list);
 648                 kfree(read_req);
 649         }
 650
 651         kfree(priv);
 652 }
 653
 654
 655 static const struct sdio_device_id iwmct_ids[] = {
 656         /* Intel Wireless MultiCom 3200 Top Driver */
 657         { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1404)},
 658         { },    /* Terminating entry */
 659 };
 660
 661 MODULE_DEVICE_TABLE(sdio, iwmct_ids);
 662
 663 static struct sdio_driver iwmct_driver = {
 664         .probe          = iwmct_probe,
 665         .remove         = iwmct_remove,
 666         .name           = DRV_NAME,
 667         .id_table       = iwmct_ids,
 668 };
 669
 670 static int __init iwmct_init(void)
 671 {
 672         int rc;
 673
 674         /* Default log filter settings */
 675         iwmct_log_set_filter(LOG_SRC_ALL, LOG_SEV_FILTER_RUNTIME);
 676         iwmct_log_set_filter(LOG_SRC_FW_MSG, LOG_SEV_FILTER_ALL);
 677         iwmct_log_set_fw_filter(LOG_SRC_ALL, FW_LOG_SEV_FILTER_RUNTIME);
 678
 679         rc = sdio_register_driver(&iwmct_driver);
 680
 681         return rc;
 682 }
 683
 684 static void __exit iwmct_exit(void)
 685 {
 686         sdio_unregister_driver(&iwmct_driver);
 687 }
 688
 689 module_init(iwmct_init);
 690 module_exit(iwmct_exit);
 691