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