drivers/staging/gdm72xx/gdm_sdio.c

   1 /*
   2  * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/kernel.h>
  17
  18 #include <linux/mmc/core.h>
  19 #include <linux/mmc/card.h>
  20 #include <linux/mmc/sdio_func.h>
  21 #include <linux/mmc/sdio_ids.h>
  22
  23 #include "gdm_sdio.h"
  24 #include "gdm_wimax.h"
  25 #include "sdio_boot.h"
  26 #include "hci.h"
  27
  28 #define TYPE_A_HEADER_SIZE      4
  29 #define TYPE_A_LOOKAHEAD_SIZE   16
  30
  31 #define MAX_NR_RX_BUF   4
  32
  33 #define SDU_TX_BUF_SIZE 2048
  34 #define TX_BUF_SIZE     2048
  35 #define TX_CHUNK_SIZE   (2048 - TYPE_A_HEADER_SIZE)
  36 #define RX_BUF_SIZE     (25*1024)
  37
  38 #define TX_HZ           2000
  39 #define TX_INTERVAL     (1000000/TX_HZ)
  40
  41 static struct sdio_tx *alloc_tx_struct(struct tx_cxt *tx)
  42 {
  43         struct sdio_tx *t = kzalloc(sizeof(*t), GFP_ATOMIC);
  44
  45         if (!t)
  46                 return NULL;
  47
  48         t->buf = kmalloc(TX_BUF_SIZE, GFP_ATOMIC);
  49         if (!t->buf) {
  50                 kfree(t);
  51                 return NULL;
  52         }
  53
  54         t->tx_cxt = tx;
  55
  56         return t;
  57 }
  58
  59 static void free_tx_struct(struct sdio_tx *t)
  60 {
  61         if (t) {
  62                 kfree(t->buf);
  63                 kfree(t);
  64         }
  65 }
  66
  67 static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx)
  68 {
  69         struct sdio_rx *r = kzalloc(sizeof(*r), GFP_ATOMIC);
  70
  71         if (r)
  72                 r->rx_cxt = rx;
  73
  74         return r;
  75 }
  76
  77 static void free_rx_struct(struct sdio_rx *r)
  78 {
  79         kfree(r);
  80 }
  81
  82 /* Before this function is called, spin lock should be locked. */
  83 static struct sdio_tx *get_tx_struct(struct tx_cxt *tx, int *no_spc)
  84 {
  85         struct sdio_tx *t;
  86
  87         if (list_empty(&tx->free_list))
  88                 return NULL;
  89
  90         t = list_entry(tx->free_list.prev, struct sdio_tx, list);
  91         list_del(&t->list);
  92
  93         *no_spc = list_empty(&tx->free_list) ? 1 : 0;
  94
  95         return t;
  96 }
  97
  98 /* Before this function is called, spin lock should be locked. */
  99 static void put_tx_struct(struct tx_cxt *tx, struct sdio_tx *t)
 100 {
 101         list_add_tail(&t->list, &tx->free_list);
 102 }
 103
 104 /* Before this function is called, spin lock should be locked. */
 105 static struct sdio_rx *get_rx_struct(struct rx_cxt *rx)
 106 {
 107         struct sdio_rx *r;
 108
 109         if (list_empty(&rx->free_list))
 110                 return NULL;
 111
 112         r = list_entry(rx->free_list.prev, struct sdio_rx, list);
 113         list_del(&r->list);
 114
 115         return r;
 116 }
 117
 118 /* Before this function is called, spin lock should be locked. */
 119 static void put_rx_struct(struct rx_cxt *rx, struct sdio_rx *r)
 120 {
 121         list_add_tail(&r->list, &rx->free_list);
 122 }
 123
 124 static void release_sdio(struct sdiowm_dev *sdev)
 125 {
 126         struct tx_cxt   *tx = &sdev->tx;
 127         struct rx_cxt   *rx = &sdev->rx;
 128         struct sdio_tx  *t, *t_next;
 129         struct sdio_rx  *r, *r_next;
 130
 131         kfree(tx->sdu_buf);
 132
 133         list_for_each_entry_safe(t, t_next, &tx->free_list, list) {
 134                 list_del(&t->list);
 135                 free_tx_struct(t);
 136         }
 137
 138         list_for_each_entry_safe(t, t_next, &tx->sdu_list, list) {
 139                 list_del(&t->list);
 140                 free_tx_struct(t);
 141         }
 142
 143         list_for_each_entry_safe(t, t_next, &tx->hci_list, list) {
 144                 list_del(&t->list);
 145                 free_tx_struct(t);
 146         }
 147
 148         kfree(rx->rx_buf);
 149
 150         list_for_each_entry_safe(r, r_next, &rx->free_list, list) {
 151                 list_del(&r->list);
 152                 free_rx_struct(r);
 153         }
 154
 155         list_for_each_entry_safe(r, r_next, &rx->req_list, list) {
 156                 list_del(&r->list);
 157                 free_rx_struct(r);
 158         }
 159 }
 160
 161 static int init_sdio(struct sdiowm_dev *sdev)
 162 {
 163         int ret = 0, i;
 164         struct tx_cxt *tx = &sdev->tx;
 165         struct rx_cxt *rx = &sdev->rx;
 166         struct sdio_tx *t;
 167         struct sdio_rx *r;
 168
 169         INIT_LIST_HEAD(&tx->free_list);
 170         INIT_LIST_HEAD(&tx->sdu_list);
 171         INIT_LIST_HEAD(&tx->hci_list);
 172
 173         spin_lock_init(&tx->lock);
 174
 175         tx->sdu_buf = kmalloc(SDU_TX_BUF_SIZE, GFP_KERNEL);
 176         if (tx->sdu_buf == NULL)
 177                 goto fail;
 178
 179         for (i = 0; i < MAX_NR_SDU_BUF; i++) {
 180                 t = alloc_tx_struct(tx);
 181                 if (t == NULL) {
 182                         ret = -ENOMEM;
 183                         goto fail;
 184                 }
 185                 list_add(&t->list, &tx->free_list);
 186         }
 187
 188         INIT_LIST_HEAD(&rx->free_list);
 189         INIT_LIST_HEAD(&rx->req_list);
 190
 191         spin_lock_init(&rx->lock);
 192
 193         for (i = 0; i < MAX_NR_RX_BUF; i++) {
 194                 r = alloc_rx_struct(rx);
 195                 if (r == NULL) {
 196                         ret = -ENOMEM;
 197                         goto fail;
 198                 }
 199                 list_add(&r->list, &rx->free_list);
 200         }
 201
 202         rx->rx_buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL);
 203         if (rx->rx_buf == NULL)
 204                 goto fail;
 205
 206         return 0;
 207
 208 fail:
 209         release_sdio(sdev);
 210         return ret;
 211 }
 212
 213 static void send_sdio_pkt(struct sdio_func *func, u8 *data, int len)
 214 {
 215         int n, blocks, ret, remain;
 216
 217         sdio_claim_host(func);
 218
 219         blocks = len / func->cur_blksize;
 220         n = blocks * func->cur_blksize;
 221         if (blocks) {
 222                 ret = sdio_memcpy_toio(func, 0, data, n);
 223                 if (ret < 0) {
 224                         if (ret != -ENOMEDIUM)
 225                                 dev_err(&func->dev,
 226                                         "gdmwms:  error: ret = %d\n", ret);
 227                         goto end_io;
 228                 }
 229         }
 230
 231         remain = len - n;
 232         remain = (remain + 3) & ~3;
 233
 234         if (remain) {
 235                 ret = sdio_memcpy_toio(func, 0, data + n, remain);
 236                 if (ret < 0) {
 237                         if (ret != -ENOMEDIUM)
 238                                 dev_err(&func->dev,
 239                                         "gdmwms:  error: ret = %d\n", ret);
 240                         goto end_io;
 241                 }
 242         }
 243
 244 end_io:
 245         sdio_release_host(func);
 246 }
 247
 248 static void send_sdu(struct sdio_func *func, struct tx_cxt *tx)
 249 {
 250         struct list_head *l, *next;
 251         struct hci_s *hci;
 252         struct sdio_tx *t;
 253         int pos, len, i, estlen, aggr_num = 0, aggr_len;
 254         u8 *buf;
 255         unsigned long flags;
 256
 257         spin_lock_irqsave(&tx->lock, flags);
 258
 259         pos = TYPE_A_HEADER_SIZE + HCI_HEADER_SIZE;
 260         list_for_each_entry(t, &tx->sdu_list, list) {
 261                 estlen = ((t->len + 3) & ~3) + 4;
 262                 if ((pos + estlen) > SDU_TX_BUF_SIZE)
 263                         break;
 264
 265                 aggr_num++;
 266                 memcpy(tx->sdu_buf + pos, t->buf, t->len);
 267                 memset(tx->sdu_buf + pos + t->len, 0, estlen - t->len);
 268                 pos += estlen;
 269         }
 270         aggr_len = pos;
 271
 272         hci = (struct hci_s *)(tx->sdu_buf + TYPE_A_HEADER_SIZE);
 273         hci->cmd_evt = cpu_to_be16(WIMAX_TX_SDU_AGGR);
 274         hci->length = cpu_to_be16(aggr_len - TYPE_A_HEADER_SIZE -
 275                                   HCI_HEADER_SIZE);
 276
 277         spin_unlock_irqrestore(&tx->lock, flags);
 278
 279         dev_dbg(&func->dev, "sdio_send: %*ph\n", aggr_len - TYPE_A_HEADER_SIZE,
 280                 tx->sdu_buf + TYPE_A_HEADER_SIZE);
 281
 282         for (pos = TYPE_A_HEADER_SIZE; pos < aggr_len; pos += TX_CHUNK_SIZE) {
 283                 len = aggr_len - pos;
 284                 len = len > TX_CHUNK_SIZE ? TX_CHUNK_SIZE : len;
 285                 buf = tx->sdu_buf + pos - TYPE_A_HEADER_SIZE;
 286
 287                 buf[0] = len & 0xff;
 288                 buf[1] = (len >> 8) & 0xff;
 289                 buf[2] = (len >> 16) & 0xff;
 290                 buf[3] = (pos + len) >= aggr_len ? 0 : 1;
 291                 send_sdio_pkt(func, buf, len + TYPE_A_HEADER_SIZE);
 292         }
 293
 294         spin_lock_irqsave(&tx->lock, flags);
 295
 296         for (l = tx->sdu_list.next, i = 0; i < aggr_num; i++, l = next) {
 297                 next = l->next;
 298                 t = list_entry(l, struct sdio_tx, list);
 299                 if (t->callback)
 300                         t->callback(t->cb_data);
 301
 302                 list_del(l);
 303                 put_tx_struct(t->tx_cxt, t);
 304         }
 305
 306         do_gettimeofday(&tx->sdu_stamp);
 307         spin_unlock_irqrestore(&tx->lock, flags);
 308 }
 309
 310 static void send_hci(struct sdio_func *func, struct tx_cxt *tx,
 311                      struct sdio_tx *t)
 312 {
 313         unsigned long flags;
 314
 315         dev_dbg(&func->dev, "sdio_send: %*ph\n", t->len - TYPE_A_HEADER_SIZE,
 316                 t->buf + TYPE_A_HEADER_SIZE);
 317
 318         send_sdio_pkt(func, t->buf, t->len);
 319
 320         spin_lock_irqsave(&tx->lock, flags);
 321         if (t->callback)
 322                 t->callback(t->cb_data);
 323         free_tx_struct(t);
 324         spin_unlock_irqrestore(&tx->lock, flags);
 325 }
 326
 327 static void do_tx(struct work_struct *work)
 328 {
 329         struct sdiowm_dev *sdev = container_of(work, struct sdiowm_dev, ws);
 330         struct sdio_func *func = sdev->func;
 331         struct tx_cxt *tx = &sdev->tx;
 332         struct sdio_tx *t = NULL;
 333         struct timeval now, *before;
 334         int is_sdu = 0;
 335         long diff;
 336         unsigned long flags;
 337
 338         spin_lock_irqsave(&tx->lock, flags);
 339         if (!tx->can_send) {
 340                 spin_unlock_irqrestore(&tx->lock, flags);
 341                 return;
 342         }
 343
 344         if (!list_empty(&tx->hci_list)) {
 345                 t = list_entry(tx->hci_list.next, struct sdio_tx, list);
 346                 list_del(&t->list);
 347                 is_sdu = 0;
 348         } else if (!tx->stop_sdu_tx && !list_empty(&tx->sdu_list)) {
 349                 do_gettimeofday(&now);
 350                 before = &tx->sdu_stamp;
 351
 352                 diff = (now.tv_sec - before->tv_sec) * 1000000 +
 353                         (now.tv_usec - before->tv_usec);
 354                 if (diff >= 0 && diff < TX_INTERVAL) {
 355                         schedule_work(&sdev->ws);
 356                         spin_unlock_irqrestore(&tx->lock, flags);
 357                         return;
 358                 }
 359                 is_sdu = 1;
 360         }
 361
 362         if (!is_sdu && t == NULL) {
 363                 spin_unlock_irqrestore(&tx->lock, flags);
 364                 return;
 365         }
 366
 367         tx->can_send = 0;
 368
 369         spin_unlock_irqrestore(&tx->lock, flags);
 370
 371         if (is_sdu)
 372                 send_sdu(func, tx);
 373         else
 374                 send_hci(func, tx, t);
 375 }
 376
 377 static int gdm_sdio_send(void *priv_dev, void *data, int len,
 378                          void (*cb)(void *data), void *cb_data)
 379 {
 380         struct sdiowm_dev *sdev = priv_dev;
 381         struct tx_cxt *tx = &sdev->tx;
 382         struct sdio_tx *t;
 383         u8 *pkt = data;
 384         int no_spc = 0;
 385         u16 cmd_evt;
 386         unsigned long flags;
 387
 388         if (len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE)
 389                 return -EINVAL;
 390
 391         spin_lock_irqsave(&tx->lock, flags);
 392
 393         cmd_evt = (pkt[0] << 8) | pkt[1];
 394         if (cmd_evt == WIMAX_TX_SDU) {
 395                 t = get_tx_struct(tx, &no_spc);
 396                 if (t == NULL) {
 397                         /* This case must not happen. */
 398                         spin_unlock_irqrestore(&tx->lock, flags);
 399                         return -ENOSPC;
 400                 }
 401                 list_add_tail(&t->list, &tx->sdu_list);
 402
 403                 memcpy(t->buf, data, len);
 404
 405                 t->len = len;
 406                 t->callback = cb;
 407                 t->cb_data = cb_data;
 408         } else {
 409                 t = alloc_tx_struct(tx);
 410                 if (t == NULL) {
 411                         spin_unlock_irqrestore(&tx->lock, flags);
 412                         return -ENOMEM;
 413                 }
 414                 list_add_tail(&t->list, &tx->hci_list);
 415
 416                 t->buf[0] = len & 0xff;
 417                 t->buf[1] = (len >> 8) & 0xff;
 418                 t->buf[2] = (len >> 16) & 0xff;
 419                 t->buf[3] = 2;
 420                 memcpy(t->buf + TYPE_A_HEADER_SIZE, data, len);
 421
 422                 t->len = len + TYPE_A_HEADER_SIZE;
 423                 t->callback = cb;
 424                 t->cb_data = cb_data;
 425         }
 426
 427         if (tx->can_send)
 428                 schedule_work(&sdev->ws);
 429
 430         spin_unlock_irqrestore(&tx->lock, flags);
 431
 432         if (no_spc)
 433                 return -ENOSPC;
 434
 435         return 0;
 436 }
 437
 438 /* Handle the HCI, WIMAX_SDU_TX_FLOW. */
 439 static int control_sdu_tx_flow(struct sdiowm_dev *sdev, u8 *hci_data, int len)
 440 {
 441         struct tx_cxt *tx = &sdev->tx;
 442         u16 cmd_evt;
 443         unsigned long flags;
 444
 445         spin_lock_irqsave(&tx->lock, flags);
 446
 447         cmd_evt = (hci_data[0] << 8) | (hci_data[1]);
 448         if (cmd_evt != WIMAX_SDU_TX_FLOW)
 449                 goto out;
 450
 451         if (hci_data[4] == 0) {
 452                 dev_dbg(&sdev->func->dev, "WIMAX ==> STOP SDU TX\n");
 453                 tx->stop_sdu_tx = 1;
 454         } else if (hci_data[4] == 1) {
 455                 dev_dbg(&sdev->func->dev, "WIMAX ==> START SDU TX\n");
 456                 tx->stop_sdu_tx = 0;
 457                 if (tx->can_send)
 458                         schedule_work(&sdev->ws);
 459                 /* If free buffer for sdu tx doesn't exist, then tx queue
 460                  * should not be woken. For this reason, don't pass the command,
 461                  * START_SDU_TX.
 462                  */
 463                 if (list_empty(&tx->free_list))
 464                         len = 0;
 465         }
 466
 467 out:
 468         spin_unlock_irqrestore(&tx->lock, flags);
 469         return len;
 470 }
 471
 472 static void gdm_sdio_irq(struct sdio_func *func)
 473 {
 474         struct phy_dev *phy_dev = sdio_get_drvdata(func);
 475         struct sdiowm_dev *sdev = phy_dev->priv_dev;
 476         struct tx_cxt *tx = &sdev->tx;
 477         struct rx_cxt *rx = &sdev->rx;
 478         struct sdio_rx *r;
 479         unsigned long flags;
 480         u8 val, hdr[TYPE_A_LOOKAHEAD_SIZE], *buf;
 481         u32 len, blocks, n;
 482         int ret, remain;
 483
 484         /* Check interrupt */
 485         val = sdio_readb(func, 0x13, &ret);
 486         if (val & 0x01)
 487                 sdio_writeb(func, 0x01, 0x13, &ret);    /* clear interrupt */
 488         else
 489                 return;
 490
 491         ret = sdio_memcpy_fromio(func, hdr, 0x0, TYPE_A_LOOKAHEAD_SIZE);
 492         if (ret) {
 493                 dev_err(&func->dev,
 494                         "Cannot read from function %d\n", func->num);
 495                 goto done;
 496         }
 497
 498         len = (hdr[2] << 16) | (hdr[1] << 8) | hdr[0];
 499         if (len > (RX_BUF_SIZE - TYPE_A_HEADER_SIZE)) {
 500                 dev_err(&func->dev, "Too big Type-A size: %d\n", len);
 501                 goto done;
 502         }
 503
 504         if (hdr[3] == 1) {      /* Ack */
 505                 u32 *ack_seq = (u32 *)&hdr[4];
 506
 507                 spin_lock_irqsave(&tx->lock, flags);
 508                 tx->can_send = 1;
 509
 510                 if (!list_empty(&tx->sdu_list) || !list_empty(&tx->hci_list))
 511                         schedule_work(&sdev->ws);
 512                 spin_unlock_irqrestore(&tx->lock, flags);
 513                 dev_dbg(&func->dev, "Ack... %0x\n", ntohl(*ack_seq));
 514                 goto done;
 515         }
 516
 517         memcpy(rx->rx_buf, hdr + TYPE_A_HEADER_SIZE,
 518                TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE);
 519
 520         buf = rx->rx_buf + TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE;
 521         remain = len - TYPE_A_LOOKAHEAD_SIZE + TYPE_A_HEADER_SIZE;
 522         if (remain <= 0)
 523                 goto end_io;
 524
 525         blocks = remain / func->cur_blksize;
 526
 527         if (blocks) {
 528                 n = blocks * func->cur_blksize;
 529                 ret = sdio_memcpy_fromio(func, buf, 0x0, n);
 530                 if (ret) {
 531                         dev_err(&func->dev,
 532                                 "Cannot read from function %d\n", func->num);
 533                         goto done;
 534                 }
 535                 buf += n;
 536                 remain -= n;
 537         }
 538
 539         if (remain) {
 540                 ret = sdio_memcpy_fromio(func, buf, 0x0, remain);
 541                 if (ret) {
 542                         dev_err(&func->dev,
 543                                 "Cannot read from function %d\n", func->num);
 544                         goto done;
 545                 }
 546         }
 547
 548 end_io:
 549         dev_dbg(&func->dev, "sdio_receive: %*ph\n", len, rx->rx_buf);
 550
 551         len = control_sdu_tx_flow(sdev, rx->rx_buf, len);
 552
 553         spin_lock_irqsave(&rx->lock, flags);
 554
 555         if (!list_empty(&rx->req_list)) {
 556                 r = list_entry(rx->req_list.next, struct sdio_rx, list);
 557                 spin_unlock_irqrestore(&rx->lock, flags);
 558                 if (r->callback)
 559                         r->callback(r->cb_data, rx->rx_buf, len);
 560                 spin_lock_irqsave(&rx->lock, flags);
 561                 list_del(&r->list);
 562                 put_rx_struct(rx, r);
 563         }
 564
 565         spin_unlock_irqrestore(&rx->lock, flags);
 566
 567 done:
 568         sdio_writeb(func, 0x00, 0x10, &ret);    /* PCRRT */
 569         if (!phy_dev->netdev)
 570                 register_wimax_device(phy_dev, &func->dev);
 571 }
 572
 573 static int gdm_sdio_receive(void *priv_dev,
 574                             void (*cb)(void *cb_data, void *data, int len),
 575                             void *cb_data)
 576 {
 577         struct sdiowm_dev *sdev = priv_dev;
 578         struct rx_cxt *rx = &sdev->rx;
 579         struct sdio_rx *r;
 580         unsigned long flags;
 581
 582         spin_lock_irqsave(&rx->lock, flags);
 583         r = get_rx_struct(rx);
 584         if (r == NULL) {
 585                 spin_unlock_irqrestore(&rx->lock, flags);
 586                 return -ENOMEM;
 587         }
 588
 589         r->callback = cb;
 590         r->cb_data = cb_data;
 591
 592         list_add_tail(&r->list, &rx->req_list);
 593         spin_unlock_irqrestore(&rx->lock, flags);
 594
 595         return 0;
 596 }
 597
 598 static int sdio_wimax_probe(struct sdio_func *func,
 599                             const struct sdio_device_id *id)
 600 {
 601         int ret;
 602         struct phy_dev *phy_dev = NULL;
 603         struct sdiowm_dev *sdev = NULL;
 604
 605         dev_info(&func->dev, "Found GDM SDIO VID = 0x%04x PID = 0x%04x...\n",
 606                  func->vendor, func->device);
 607         dev_info(&func->dev, "GCT WiMax driver version %s\n", DRIVER_VERSION);
 608
 609         sdio_claim_host(func);
 610         sdio_enable_func(func);
 611         sdio_claim_irq(func, gdm_sdio_irq);
 612
 613         ret = sdio_boot(func);
 614         if (ret)
 615                 return ret;
 616
 617         phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL);
 618         if (phy_dev == NULL) {
 619                 ret = -ENOMEM;
 620                 goto out;
 621         }
 622         sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
 623         if (sdev == NULL) {
 624                 ret = -ENOMEM;
 625                 goto out;
 626         }
 627
 628         phy_dev->priv_dev = (void *)sdev;
 629         phy_dev->send_func = gdm_sdio_send;
 630         phy_dev->rcv_func = gdm_sdio_receive;
 631
 632         ret = init_sdio(sdev);
 633         if (ret < 0)
 634                 goto out;
 635
 636         sdev->func = func;
 637
 638         sdio_writeb(func, 1, 0x14, &ret);       /* Enable interrupt */
 639         sdio_release_host(func);
 640
 641         INIT_WORK(&sdev->ws, do_tx);
 642
 643         sdio_set_drvdata(func, phy_dev);
 644 out:
 645         if (ret) {
 646                 kfree(phy_dev);
 647                 kfree(sdev);
 648         }
 649
 650         return ret;
 651 }
 652
 653 static void sdio_wimax_remove(struct sdio_func *func)
 654 {
 655         struct phy_dev *phy_dev = sdio_get_drvdata(func);
 656         struct sdiowm_dev *sdev = phy_dev->priv_dev;
 657
 658         cancel_work_sync(&sdev->ws);
 659         if (phy_dev->netdev)
 660                 unregister_wimax_device(phy_dev);
 661         sdio_claim_host(func);
 662         sdio_release_irq(func);
 663         sdio_disable_func(func);
 664         sdio_release_host(func);
 665         release_sdio(sdev);
 666
 667         kfree(sdev);
 668         kfree(phy_dev);
 669 }
 670
 671 static const struct sdio_device_id sdio_wimax_ids[] = {
 672         { SDIO_DEVICE(0x0296, 0x5347) },
 673         {0}
 674 };
 675
 676 MODULE_DEVICE_TABLE(sdio, sdio_wimax_ids);
 677
 678 static struct sdio_driver sdio_wimax_driver = {
 679         .probe          = sdio_wimax_probe,
 680         .remove         = sdio_wimax_remove,
 681         .name           = "sdio_wimax",
 682         .id_table       = sdio_wimax_ids,
 683 };
 684
 685 static int __init sdio_gdm_wimax_init(void)
 686 {
 687         return sdio_register_driver(&sdio_wimax_driver);
 688 }
 689
 690 static void __exit sdio_gdm_wimax_exit(void)
 691 {
 692         sdio_unregister_driver(&sdio_wimax_driver);
 693 }
 694
 695 module_init(sdio_gdm_wimax_init);
 696 module_exit(sdio_gdm_wimax_exit);
 697
 698 MODULE_VERSION(DRIVER_VERSION);
 699 MODULE_DESCRIPTION("GCT WiMax SDIO Device Driver");
 700 MODULE_AUTHOR("Ethan Park");
 701 MODULE_LICENSE("GPL");