drivers/net/wireless/mwifiex/sdio.c

   1 /*
   2  * Marvell Wireless LAN device driver: SDIO specific handling
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include <linux/firmware.h>
  21
  22 #include "decl.h"
  23 #include "ioctl.h"
  24 #include "util.h"
  25 #include "fw.h"
  26 #include "main.h"
  27 #include "wmm.h"
  28 #include "11n.h"
  29 #include "sdio.h"
  30
  31
  32 #define SDIO_VERSION    "1.0"
  33
  34 /* The mwifiex_sdio_remove() callback function is called when
  35  * user removes this module from kernel space or ejects
  36  * the card from the slot. The driver handles these 2 cases
  37  * differently.
  38  * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
  39  * HS_CANCEL etc.) are sent to the firmware.
  40  * If the card is removed, there is no need to send these command.
  41  *
  42  * The variable 'user_rmmod' is used to distinguish these two
  43  * scenarios. This flag is initialized as FALSE in case the card
  44  * is removed, and will be set to TRUE for module removal when
  45  * module_exit function is called.
  46  */
  47 static u8 user_rmmod;
  48
  49 static struct mwifiex_if_ops sdio_ops;
  50 static unsigned long iface_work_flags;
  51
  52 static struct semaphore add_remove_card_sem;
  53
  54 static struct memory_type_mapping mem_type_mapping_tbl[] = {
  55         {"ITCM", NULL, 0, 0xF0},
  56         {"DTCM", NULL, 0, 0xF1},
  57         {"SQRAM", NULL, 0, 0xF2},
  58         {"APU", NULL, 0, 0xF3},
  59         {"CIU", NULL, 0, 0xF4},
  60         {"ICU", NULL, 0, 0xF5},
  61         {"MAC", NULL, 0, 0xF6},
  62         {"EXT7", NULL, 0, 0xF7},
  63         {"EXT8", NULL, 0, 0xF8},
  64         {"EXT9", NULL, 0, 0xF9},
  65         {"EXT10", NULL, 0, 0xFA},
  66         {"EXT11", NULL, 0, 0xFB},
  67         {"EXT12", NULL, 0, 0xFC},
  68         {"EXT13", NULL, 0, 0xFD},
  69         {"EXTLAST", NULL, 0, 0xFE},
  70 };
  71
  72 /*
  73  * SDIO probe.
  74  *
  75  * This function probes an mwifiex device and registers it. It allocates
  76  * the card structure, enables SDIO function number and initiates the
  77  * device registration and initialization procedure by adding a logical
  78  * interface.
  79  */
  80 static int
  81 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
  82 {
  83         int ret;
  84         struct sdio_mmc_card *card = NULL;
  85
  86         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
  87                  func->vendor, func->device, func->class, func->num);
  88
  89         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
  90         if (!card)
  91                 return -ENOMEM;
  92
  93         card->func = func;
  94
  95         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
  96
  97         if (id->driver_data) {
  98                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
  99
 100                 card->firmware = data->firmware;
 101                 card->reg = data->reg;
 102                 card->max_ports = data->max_ports;
 103                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
 104                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
 105                 card->has_control_mask = data->has_control_mask;
 106                 card->tx_buf_size = data->tx_buf_size;
 107                 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
 108                 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
 109                 card->can_dump_fw = data->can_dump_fw;
 110                 card->can_auto_tdls = data->can_auto_tdls;
 111                 card->can_ext_scan = data->can_ext_scan;
 112         }
 113
 114         sdio_claim_host(func);
 115         ret = sdio_enable_func(func);
 116         sdio_release_host(func);
 117
 118         if (ret) {
 119                 pr_err("%s: failed to enable function\n", __func__);
 120                 kfree(card);
 121                 return -EIO;
 122         }
 123
 124         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
 125                              MWIFIEX_SDIO)) {
 126                 pr_err("%s: add card failed\n", __func__);
 127                 kfree(card);
 128                 sdio_claim_host(func);
 129                 ret = sdio_disable_func(func);
 130                 sdio_release_host(func);
 131                 ret = -1;
 132         }
 133
 134         return ret;
 135 }
 136
 137 /*
 138  * SDIO resume.
 139  *
 140  * Kernel needs to suspend all functions separately. Therefore all
 141  * registered functions must have drivers with suspend and resume
 142  * methods. Failing that the kernel simply removes the whole card.
 143  *
 144  * If already not resumed, this function turns on the traffic and
 145  * sends a host sleep cancel request to the firmware.
 146  */
 147 static int mwifiex_sdio_resume(struct device *dev)
 148 {
 149         struct sdio_func *func = dev_to_sdio_func(dev);
 150         struct sdio_mmc_card *card;
 151         struct mwifiex_adapter *adapter;
 152         mmc_pm_flag_t pm_flag = 0;
 153
 154         if (func) {
 155                 pm_flag = sdio_get_host_pm_caps(func);
 156                 card = sdio_get_drvdata(func);
 157                 if (!card || !card->adapter) {
 158                         pr_err("resume: invalid card or adapter\n");
 159                         return 0;
 160                 }
 161         } else {
 162                 pr_err("resume: sdio_func is not specified\n");
 163                 return 0;
 164         }
 165
 166         adapter = card->adapter;
 167
 168         if (!adapter->is_suspended) {
 169                 mwifiex_dbg(adapter, WARN,
 170                             "device already resumed\n");
 171                 return 0;
 172         }
 173
 174         adapter->is_suspended = false;
 175
 176         /* Disable Host Sleep */
 177         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 178                           MWIFIEX_ASYNC_CMD);
 179
 180         return 0;
 181 }
 182
 183 /*
 184  * SDIO remove.
 185  *
 186  * This function removes the interface and frees up the card structure.
 187  */
 188 static void
 189 mwifiex_sdio_remove(struct sdio_func *func)
 190 {
 191         struct sdio_mmc_card *card;
 192         struct mwifiex_adapter *adapter;
 193         struct mwifiex_private *priv;
 194
 195         card = sdio_get_drvdata(func);
 196         if (!card)
 197                 return;
 198
 199         adapter = card->adapter;
 200         if (!adapter || !adapter->priv_num)
 201                 return;
 202
 203         mwifiex_dbg(adapter, INFO, "info: SDIO func num=%d\n", func->num);
 204
 205         if (user_rmmod) {
 206                 if (adapter->is_suspended)
 207                         mwifiex_sdio_resume(adapter->dev);
 208
 209                 mwifiex_deauthenticate_all(adapter);
 210
 211                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 212                 mwifiex_disable_auto_ds(priv);
 213                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
 214         }
 215
 216         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
 217 }
 218
 219 /*
 220  * SDIO suspend.
 221  *
 222  * Kernel needs to suspend all functions separately. Therefore all
 223  * registered functions must have drivers with suspend and resume
 224  * methods. Failing that the kernel simply removes the whole card.
 225  *
 226  * If already not suspended, this function allocates and sends a host
 227  * sleep activate request to the firmware and turns off the traffic.
 228  */
 229 static int mwifiex_sdio_suspend(struct device *dev)
 230 {
 231         struct sdio_func *func = dev_to_sdio_func(dev);
 232         struct sdio_mmc_card *card;
 233         struct mwifiex_adapter *adapter;
 234         mmc_pm_flag_t pm_flag = 0;
 235         int ret = 0;
 236
 237         if (func) {
 238                 pm_flag = sdio_get_host_pm_caps(func);
 239                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
 240                          sdio_func_id(func), pm_flag);
 241                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
 242                         pr_err("%s: cannot remain alive while host is"
 243                                 " suspended\n", sdio_func_id(func));
 244                         return -ENOSYS;
 245                 }
 246
 247                 card = sdio_get_drvdata(func);
 248                 if (!card || !card->adapter) {
 249                         pr_err("suspend: invalid card or adapter\n");
 250                         return 0;
 251                 }
 252         } else {
 253                 pr_err("suspend: sdio_func is not specified\n");
 254                 return 0;
 255         }
 256
 257         adapter = card->adapter;
 258
 259         /* Enable the Host Sleep */
 260         if (!mwifiex_enable_hs(adapter)) {
 261                 mwifiex_dbg(adapter, ERROR,
 262                             "cmd: failed to suspend\n");
 263                 adapter->hs_enabling = false;
 264                 return -EFAULT;
 265         }
 266
 267         mwifiex_dbg(adapter, INFO,
 268                     "cmd: suspend with MMC_PM_KEEP_POWER\n");
 269         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 270
 271         /* Indicate device suspended */
 272         adapter->is_suspended = true;
 273         adapter->hs_enabling = false;
 274
 275         return ret;
 276 }
 277
 278 /* Device ID for SD8786 */
 279 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
 280 /* Device ID for SD8787 */
 281 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
 282 /* Device ID for SD8797 */
 283 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
 284 /* Device ID for SD8897 */
 285 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
 286 /* Device ID for SD8887 */
 287 #define SDIO_DEVICE_ID_MARVELL_8887   (0x9135)
 288 /* Device ID for SD8801 */
 289 #define SDIO_DEVICE_ID_MARVELL_8801   (0x9139)
 290
 291
 292 /* WLAN IDs */
 293 static const struct sdio_device_id mwifiex_ids[] = {
 294         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
 295                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
 296         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
 297                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
 298         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
 299                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
 300         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
 301                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
 302         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887),
 303                 .driver_data = (unsigned long)&mwifiex_sdio_sd8887},
 304         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8801),
 305                 .driver_data = (unsigned long)&mwifiex_sdio_sd8801},
 306         {},
 307 };
 308
 309 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
 310
 311 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
 312         .suspend = mwifiex_sdio_suspend,
 313         .resume = mwifiex_sdio_resume,
 314 };
 315
 316 static struct sdio_driver mwifiex_sdio = {
 317         .name = "mwifiex_sdio",
 318         .id_table = mwifiex_ids,
 319         .probe = mwifiex_sdio_probe,
 320         .remove = mwifiex_sdio_remove,
 321         .drv = {
 322                 .owner = THIS_MODULE,
 323                 .pm = &mwifiex_sdio_pm_ops,
 324         }
 325 };
 326
 327 /* Write data into SDIO card register. Caller claims SDIO device. */
 328 static int
 329 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
 330 {
 331         int ret = -1;
 332         sdio_writeb(func, data, reg, &ret);
 333         return ret;
 334 }
 335
 336 /*
 337  * This function writes data into SDIO card register.
 338  */
 339 static int
 340 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
 341 {
 342         struct sdio_mmc_card *card = adapter->card;
 343         int ret;
 344
 345         sdio_claim_host(card->func);
 346         ret = mwifiex_write_reg_locked(card->func, reg, data);
 347         sdio_release_host(card->func);
 348
 349         return ret;
 350 }
 351
 352 /*
 353  * This function reads data from SDIO card register.
 354  */
 355 static int
 356 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
 357 {
 358         struct sdio_mmc_card *card = adapter->card;
 359         int ret = -1;
 360         u8 val;
 361
 362         sdio_claim_host(card->func);
 363         val = sdio_readb(card->func, reg, &ret);
 364         sdio_release_host(card->func);
 365
 366         *data = val;
 367
 368         return ret;
 369 }
 370
 371 /*
 372  * This function writes multiple data into SDIO card memory.
 373  *
 374  * This does not work in suspended mode.
 375  */
 376 static int
 377 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
 378                         u8 *buffer, u32 pkt_len, u32 port)
 379 {
 380         struct sdio_mmc_card *card = adapter->card;
 381         int ret;
 382         u8 blk_mode =
 383                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
 384         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 385         u32 blk_cnt =
 386                 (blk_mode ==
 387                  BLOCK_MODE) ? (pkt_len /
 388                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
 389         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 390
 391         if (adapter->is_suspended) {
 392                 mwifiex_dbg(adapter, ERROR,
 393                             "%s: not allowed while suspended\n", __func__);
 394                 return -1;
 395         }
 396
 397         sdio_claim_host(card->func);
 398
 399         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
 400
 401         sdio_release_host(card->func);
 402
 403         return ret;
 404 }
 405
 406 /*
 407  * This function reads multiple data from SDIO card memory.
 408  */
 409 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
 410                                   u32 len, u32 port, u8 claim)
 411 {
 412         struct sdio_mmc_card *card = adapter->card;
 413         int ret;
 414         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
 415                        : BLOCK_MODE;
 416         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 417         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
 418                         : len;
 419         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 420
 421         if (claim)
 422                 sdio_claim_host(card->func);
 423
 424         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
 425
 426         if (claim)
 427                 sdio_release_host(card->func);
 428
 429         return ret;
 430 }
 431
 432 /*
 433  * This function wakes up the card.
 434  *
 435  * A host power up command is written to the card configuration
 436  * register to wake up the card.
 437  */
 438 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
 439 {
 440         mwifiex_dbg(adapter, EVENT,
 441                     "event: wakeup device...\n");
 442
 443         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
 444 }
 445
 446 /*
 447  * This function is called after the card has woken up.
 448  *
 449  * The card configuration register is reset.
 450  */
 451 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
 452 {
 453         mwifiex_dbg(adapter, EVENT,
 454                     "cmd: wakeup device completed\n");
 455
 456         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
 457 }
 458
 459 /*
 460  * This function is used to initialize IO ports for the
 461  * chipsets supporting SDIO new mode eg SD8897.
 462  */
 463 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
 464 {
 465         u8 reg;
 466         struct sdio_mmc_card *card = adapter->card;
 467
 468         adapter->ioport = MEM_PORT;
 469
 470         /* enable sdio new mode */
 471         if (mwifiex_read_reg(adapter, card->reg->card_cfg_2_1_reg, &reg))
 472                 return -1;
 473         if (mwifiex_write_reg(adapter, card->reg->card_cfg_2_1_reg,
 474                               reg | CMD53_NEW_MODE))
 475                 return -1;
 476
 477         /* Configure cmd port and enable reading rx length from the register */
 478         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_0, &reg))
 479                 return -1;
 480         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_0,
 481                               reg | CMD_PORT_RD_LEN_EN))
 482                 return -1;
 483
 484         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
 485          * completed
 486          */
 487         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_1, &reg))
 488                 return -1;
 489         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_1,
 490                               reg | CMD_PORT_AUTO_EN))
 491                 return -1;
 492
 493         return 0;
 494 }
 495
 496 /* This function initializes the IO ports.
 497  *
 498  * The following operations are performed -
 499  *      - Read the IO ports (0, 1 and 2)
 500  *      - Set host interrupt Reset-To-Read to clear
 501  *      - Set auto re-enable interrupt
 502  */
 503 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
 504 {
 505         u8 reg;
 506         struct sdio_mmc_card *card = adapter->card;
 507
 508         adapter->ioport = 0;
 509
 510         if (card->supports_sdio_new_mode) {
 511                 if (mwifiex_init_sdio_new_mode(adapter))
 512                         return -1;
 513                 goto cont;
 514         }
 515
 516         /* Read the IO port */
 517         if (!mwifiex_read_reg(adapter, card->reg->io_port_0_reg, &reg))
 518                 adapter->ioport |= (reg & 0xff);
 519         else
 520                 return -1;
 521
 522         if (!mwifiex_read_reg(adapter, card->reg->io_port_1_reg, &reg))
 523                 adapter->ioport |= ((reg & 0xff) << 8);
 524         else
 525                 return -1;
 526
 527         if (!mwifiex_read_reg(adapter, card->reg->io_port_2_reg, &reg))
 528                 adapter->ioport |= ((reg & 0xff) << 16);
 529         else
 530                 return -1;
 531 cont:
 532         mwifiex_dbg(adapter, INFO,
 533                     "info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
 534
 535         /* Set Host interrupt reset to read to clear */
 536         if (!mwifiex_read_reg(adapter, card->reg->host_int_rsr_reg, &reg))
 537                 mwifiex_write_reg(adapter, card->reg->host_int_rsr_reg,
 538                                   reg | card->reg->sdio_int_mask);
 539         else
 540                 return -1;
 541
 542         /* Dnld/Upld ready set to auto reset */
 543         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
 544                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
 545                                   reg | AUTO_RE_ENABLE_INT);
 546         else
 547                 return -1;
 548
 549         return 0;
 550 }
 551
 552 /*
 553  * This function sends data to the card.
 554  */
 555 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
 556                                       u8 *payload, u32 pkt_len, u32 port)
 557 {
 558         u32 i = 0;
 559         int ret;
 560
 561         do {
 562                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
 563                 if (ret) {
 564                         i++;
 565                         mwifiex_dbg(adapter, ERROR,
 566                                     "host_to_card, write iomem\t"
 567                                     "(%d) failed: %d\n", i, ret);
 568                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
 569                                 mwifiex_dbg(adapter, ERROR,
 570                                             "write CFG reg failed\n");
 571
 572                         ret = -1;
 573                         if (i > MAX_WRITE_IOMEM_RETRY)
 574                                 return ret;
 575                 }
 576         } while (ret == -1);
 577
 578         return ret;
 579 }
 580
 581 /*
 582  * This function gets the read port.
 583  *
 584  * If control port bit is set in MP read bitmap, the control port
 585  * is returned, otherwise the current read port is returned and
 586  * the value is increased (provided it does not reach the maximum
 587  * limit, in which case it is reset to 1)
 588  */
 589 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
 590 {
 591         struct sdio_mmc_card *card = adapter->card;
 592         const struct mwifiex_sdio_card_reg *reg = card->reg;
 593         u32 rd_bitmap = card->mp_rd_bitmap;
 594
 595         mwifiex_dbg(adapter, DATA,
 596                     "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
 597
 598         if (card->supports_sdio_new_mode) {
 599                 if (!(rd_bitmap & reg->data_port_mask))
 600                         return -1;
 601         } else {
 602                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
 603                         return -1;
 604         }
 605
 606         if ((card->has_control_mask) &&
 607             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
 608                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
 609                 *port = CTRL_PORT;
 610                 mwifiex_dbg(adapter, DATA,
 611                             "data: port=%d mp_rd_bitmap=0x%08x\n",
 612                             *port, card->mp_rd_bitmap);
 613                 return 0;
 614         }
 615
 616         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
 617                 return -1;
 618
 619         /* We are now handling the SDIO data ports */
 620         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
 621         *port = card->curr_rd_port;
 622
 623         if (++card->curr_rd_port == card->max_ports)
 624                 card->curr_rd_port = reg->start_rd_port;
 625
 626         mwifiex_dbg(adapter, DATA,
 627                     "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
 628                     *port, rd_bitmap, card->mp_rd_bitmap);
 629
 630         return 0;
 631 }
 632
 633 /*
 634  * This function gets the write port for data.
 635  *
 636  * The current write port is returned if available and the value is
 637  * increased (provided it does not reach the maximum limit, in which
 638  * case it is reset to 1)
 639  */
 640 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
 641 {
 642         struct sdio_mmc_card *card = adapter->card;
 643         const struct mwifiex_sdio_card_reg *reg = card->reg;
 644         u32 wr_bitmap = card->mp_wr_bitmap;
 645
 646         mwifiex_dbg(adapter, DATA,
 647                     "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
 648
 649         if (!(wr_bitmap & card->mp_data_port_mask)) {
 650                 adapter->data_sent = true;
 651                 return -EBUSY;
 652         }
 653
 654         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
 655                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
 656                 *port = card->curr_wr_port;
 657                 if (++card->curr_wr_port == card->mp_end_port)
 658                         card->curr_wr_port = reg->start_wr_port;
 659         } else {
 660                 adapter->data_sent = true;
 661                 return -EBUSY;
 662         }
 663
 664         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
 665                 mwifiex_dbg(adapter, ERROR,
 666                             "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 667                             *port, card->curr_wr_port, wr_bitmap,
 668                             card->mp_wr_bitmap);
 669                 return -1;
 670         }
 671
 672         mwifiex_dbg(adapter, DATA,
 673                     "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 674                     *port, wr_bitmap, card->mp_wr_bitmap);
 675
 676         return 0;
 677 }
 678
 679 /*
 680  * This function polls the card status.
 681  */
 682 static int
 683 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
 684 {
 685         struct sdio_mmc_card *card = adapter->card;
 686         u32 tries;
 687         u8 cs;
 688
 689         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 690                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
 691                         break;
 692                 else if ((cs & bits) == bits)
 693                         return 0;
 694
 695                 usleep_range(10, 20);
 696         }
 697
 698         mwifiex_dbg(adapter, ERROR,
 699                     "poll card status failed, tries = %d\n", tries);
 700
 701         return -1;
 702 }
 703
 704 /*
 705  * This function reads the firmware status.
 706  */
 707 static int
 708 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
 709 {
 710         struct sdio_mmc_card *card = adapter->card;
 711         const struct mwifiex_sdio_card_reg *reg = card->reg;
 712         u8 fws0, fws1;
 713
 714         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
 715                 return -1;
 716
 717         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
 718                 return -1;
 719
 720         *dat = (u16) ((fws1 << 8) | fws0);
 721
 722         return 0;
 723 }
 724
 725 /*
 726  * This function disables the host interrupt.
 727  *
 728  * The host interrupt mask is read, the disable bit is reset and
 729  * written back to the card host interrupt mask register.
 730  */
 731 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
 732 {
 733         struct sdio_mmc_card *card = adapter->card;
 734         struct sdio_func *func = card->func;
 735
 736         sdio_claim_host(func);
 737         mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg, 0);
 738         sdio_release_irq(func);
 739         sdio_release_host(func);
 740 }
 741
 742 /*
 743  * This function reads the interrupt status from card.
 744  */
 745 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
 746 {
 747         struct sdio_mmc_card *card = adapter->card;
 748         u8 sdio_ireg;
 749         unsigned long flags;
 750
 751         if (mwifiex_read_data_sync(adapter, card->mp_regs,
 752                                    card->reg->max_mp_regs,
 753                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
 754                 mwifiex_dbg(adapter, ERROR, "read mp_regs failed\n");
 755                 return;
 756         }
 757
 758         sdio_ireg = card->mp_regs[card->reg->host_int_status_reg];
 759         if (sdio_ireg) {
 760                 /*
 761                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 762                  * For SDIO new mode CMD port interrupts
 763                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
 764                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
 765                  * Clear the interrupt status register
 766                  */
 767                 mwifiex_dbg(adapter, INTR,
 768                             "int: sdio_ireg = %#x\n", sdio_ireg);
 769                 spin_lock_irqsave(&adapter->int_lock, flags);
 770                 adapter->int_status |= sdio_ireg;
 771                 spin_unlock_irqrestore(&adapter->int_lock, flags);
 772         }
 773 }
 774
 775 /*
 776  * SDIO interrupt handler.
 777  *
 778  * This function reads the interrupt status from firmware and handles
 779  * the interrupt in current thread (ksdioirqd) right away.
 780  */
 781 static void
 782 mwifiex_sdio_interrupt(struct sdio_func *func)
 783 {
 784         struct mwifiex_adapter *adapter;
 785         struct sdio_mmc_card *card;
 786
 787         card = sdio_get_drvdata(func);
 788         if (!card || !card->adapter) {
 789                 pr_debug("int: func=%p card=%p adapter=%p\n",
 790                          func, card, card ? card->adapter : NULL);
 791                 return;
 792         }
 793         adapter = card->adapter;
 794
 795         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
 796                 adapter->ps_state = PS_STATE_AWAKE;
 797
 798         mwifiex_interrupt_status(adapter);
 799         mwifiex_main_process(adapter);
 800 }
 801
 802 /*
 803  * This function enables the host interrupt.
 804  *
 805  * The host interrupt enable mask is written to the card
 806  * host interrupt mask register.
 807  */
 808 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
 809 {
 810         struct sdio_mmc_card *card = adapter->card;
 811         struct sdio_func *func = card->func;
 812         int ret;
 813
 814         sdio_claim_host(func);
 815
 816         /* Request the SDIO IRQ */
 817         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
 818         if (ret) {
 819                 mwifiex_dbg(adapter, ERROR,
 820                             "claim irq failed: ret=%d\n", ret);
 821                 goto out;
 822         }
 823
 824         /* Simply write the mask to the register */
 825         ret = mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg,
 826                                        card->reg->host_int_enable);
 827         if (ret) {
 828                 mwifiex_dbg(adapter, ERROR,
 829                             "enable host interrupt failed\n");
 830                 sdio_release_irq(func);
 831         }
 832
 833 out:
 834         sdio_release_host(func);
 835         return ret;
 836 }
 837
 838 /*
 839  * This function sends a data buffer to the card.
 840  */
 841 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
 842                                      u32 *type, u8 *buffer,
 843                                      u32 npayload, u32 ioport)
 844 {
 845         int ret;
 846         u32 nb;
 847
 848         if (!buffer) {
 849                 mwifiex_dbg(adapter, ERROR,
 850                             "%s: buffer is NULL\n", __func__);
 851                 return -1;
 852         }
 853
 854         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
 855
 856         if (ret) {
 857                 mwifiex_dbg(adapter, ERROR,
 858                             "%s: read iomem failed: %d\n", __func__,
 859                         ret);
 860                 return -1;
 861         }
 862
 863         nb = le16_to_cpu(*(__le16 *) (buffer));
 864         if (nb > npayload) {
 865                 mwifiex_dbg(adapter, ERROR,
 866                             "%s: invalid packet, nb=%d npayload=%d\n",
 867                             __func__, nb, npayload);
 868                 return -1;
 869         }
 870
 871         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
 872
 873         return ret;
 874 }
 875
 876 /*
 877  * This function downloads the firmware to the card.
 878  *
 879  * Firmware is downloaded to the card in blocks. Every block download
 880  * is tested for CRC errors, and retried a number of times before
 881  * returning failure.
 882  */
 883 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 884                                     struct mwifiex_fw_image *fw)
 885 {
 886         struct sdio_mmc_card *card = adapter->card;
 887         const struct mwifiex_sdio_card_reg *reg = card->reg;
 888         int ret;
 889         u8 *firmware = fw->fw_buf;
 890         u32 firmware_len = fw->fw_len;
 891         u32 offset = 0;
 892         u8 base0, base1;
 893         u8 *fwbuf;
 894         u16 len = 0;
 895         u32 txlen, tx_blocks = 0, tries;
 896         u32 i = 0;
 897
 898         if (!firmware_len) {
 899                 mwifiex_dbg(adapter, ERROR,
 900                             "firmware image not found! Terminating download\n");
 901                 return -1;
 902         }
 903
 904         mwifiex_dbg(adapter, INFO,
 905                     "info: downloading FW image (%d bytes)\n",
 906                     firmware_len);
 907
 908         /* Assume that the allocated buffer is 8-byte aligned */
 909         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
 910         if (!fwbuf)
 911                 return -ENOMEM;
 912
 913         /* Perform firmware data transfer */
 914         do {
 915                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
 916                    bits */
 917                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
 918                                                     DN_LD_CARD_RDY);
 919                 if (ret) {
 920                         mwifiex_dbg(adapter, ERROR,
 921                                     "FW download with helper:\t"
 922                                     "poll status timeout @ %d\n", offset);
 923                         goto done;
 924                 }
 925
 926                 /* More data? */
 927                 if (offset >= firmware_len)
 928                         break;
 929
 930                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 931                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
 932                                                &base0);
 933                         if (ret) {
 934                                 mwifiex_dbg(adapter, ERROR,
 935                                             "dev BASE0 register read failed:\t"
 936                                             "base0=%#04X(%d). Terminating dnld\n",
 937                                             base0, base0);
 938                                 goto done;
 939                         }
 940                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
 941                                                &base1);
 942                         if (ret) {
 943                                 mwifiex_dbg(adapter, ERROR,
 944                                             "dev BASE1 register read failed:\t"
 945                                             "base1=%#04X(%d). Terminating dnld\n",
 946                                             base1, base1);
 947                                 goto done;
 948                         }
 949                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
 950
 951                         if (len)
 952                                 break;
 953
 954                         usleep_range(10, 20);
 955                 }
 956
 957                 if (!len) {
 958                         break;
 959                 } else if (len > MWIFIEX_UPLD_SIZE) {
 960                         mwifiex_dbg(adapter, ERROR,
 961                                     "FW dnld failed @ %d, invalid length %d\n",
 962                                     offset, len);
 963                         ret = -1;
 964                         goto done;
 965                 }
 966
 967                 txlen = len;
 968
 969                 if (len & BIT(0)) {
 970                         i++;
 971                         if (i > MAX_WRITE_IOMEM_RETRY) {
 972                                 mwifiex_dbg(adapter, ERROR,
 973                                             "FW dnld failed @ %d, over max retry\n",
 974                                             offset);
 975                                 ret = -1;
 976                                 goto done;
 977                         }
 978                         mwifiex_dbg(adapter, ERROR,
 979                                     "CRC indicated by the helper:\t"
 980                                     "len = 0x%04X, txlen = %d\n", len, txlen);
 981                         len &= ~BIT(0);
 982                         /* Setting this to 0 to resend from same offset */
 983                         txlen = 0;
 984                 } else {
 985                         i = 0;
 986
 987                         /* Set blocksize to transfer - checking for last
 988                            block */
 989                         if (firmware_len - offset < txlen)
 990                                 txlen = firmware_len - offset;
 991
 992                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
 993                                     / MWIFIEX_SDIO_BLOCK_SIZE;
 994
 995                         /* Copy payload to buffer */
 996                         memmove(fwbuf, &firmware[offset], txlen);
 997                 }
 998
 999                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
1000                                               MWIFIEX_SDIO_BLOCK_SIZE,
1001                                               adapter->ioport);
1002                 if (ret) {
1003                         mwifiex_dbg(adapter, ERROR,
1004                                     "FW download, write iomem (%d) failed @ %d\n",
1005                                     i, offset);
1006                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
1007                                 mwifiex_dbg(adapter, ERROR,
1008                                             "write CFG reg failed\n");
1009
1010                         ret = -1;
1011                         goto done;
1012                 }
1013
1014                 offset += txlen;
1015         } while (true);
1016
1017         mwifiex_dbg(adapter, MSG,
1018                     "info: FW download over, size %d bytes\n", offset);
1019
1020         ret = 0;
1021 done:
1022         kfree(fwbuf);
1023         return ret;
1024 }
1025
1026 /*
1027  * This function checks the firmware status in card.
1028  *
1029  * The winner interface is also determined by this function.
1030  */
1031 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1032                                    u32 poll_num)
1033 {
1034         struct sdio_mmc_card *card = adapter->card;
1035         int ret = 0;
1036         u16 firmware_stat;
1037         u32 tries;
1038         u8 winner_status;
1039
1040         /* Wait for firmware initialization event */
1041         for (tries = 0; tries < poll_num; tries++) {
1042                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1043                 if (ret)
1044                         continue;
1045                 if (firmware_stat == FIRMWARE_READY_SDIO) {
1046                         ret = 0;
1047                         break;
1048                 } else {
1049                         msleep(100);
1050                         ret = -1;
1051                 }
1052         }
1053
1054         if (ret) {
1055                 if (mwifiex_read_reg
1056                     (adapter, card->reg->status_reg_0, &winner_status))
1057                         winner_status = 0;
1058
1059                 if (winner_status)
1060                         adapter->winner = 0;
1061                 else
1062                         adapter->winner = 1;
1063         }
1064         return ret;
1065 }
1066
1067 /*
1068  * This function decode sdio aggreation pkt.
1069  *
1070  * Based on the the data block size and pkt_len,
1071  * skb data will be decoded to few packets.
1072  */
1073 static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
1074                                     struct sk_buff *skb)
1075 {
1076         u32 total_pkt_len, pkt_len;
1077         struct sk_buff *skb_deaggr;
1078         u32 pkt_type;
1079         u16 blk_size;
1080         u8 blk_num;
1081         u8 *data;
1082
1083         data = skb->data;
1084         total_pkt_len = skb->len;
1085
1086         while (total_pkt_len >= (SDIO_HEADER_OFFSET + INTF_HEADER_LEN)) {
1087                 if (total_pkt_len < adapter->sdio_rx_block_size)
1088                         break;
1089                 blk_num = *(data + BLOCK_NUMBER_OFFSET);
1090                 blk_size = adapter->sdio_rx_block_size * blk_num;
1091                 if (blk_size > total_pkt_len) {
1092                         mwifiex_dbg(adapter, ERROR,
1093                                     "%s: error in blk_size,\t"
1094                                     "blk_num=%d, blk_size=%d, total_pkt_len=%d\n",
1095                                     __func__, blk_num, blk_size, total_pkt_len);
1096                         break;
1097                 }
1098                 pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
1099                 pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
1100                                          2));
1101                 if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
1102                         mwifiex_dbg(adapter, ERROR,
1103                                     "%s: error in pkt_len,\t"
1104                                     "pkt_len=%d, blk_size=%d\n",
1105                                     __func__, pkt_len, blk_size);
1106                         break;
1107                 }
1108                 skb_deaggr = mwifiex_alloc_dma_align_buf(pkt_len,
1109                                                          GFP_KERNEL | GFP_DMA);
1110                 if (!skb_deaggr)
1111                         break;
1112                 skb_put(skb_deaggr, pkt_len);
1113                 memcpy(skb_deaggr->data, data + SDIO_HEADER_OFFSET, pkt_len);
1114                 skb_pull(skb_deaggr, INTF_HEADER_LEN);
1115
1116                 mwifiex_handle_rx_packet(adapter, skb_deaggr);
1117                 data += blk_size;
1118                 total_pkt_len -= blk_size;
1119         }
1120 }
1121
1122 /*
1123  * This function decodes a received packet.
1124  *
1125  * Based on the type, the packet is treated as either a data, or
1126  * a command response, or an event, and the correct handler
1127  * function is invoked.
1128  */
1129 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1130                                     struct sk_buff *skb, u32 upld_typ)
1131 {
1132         u8 *cmd_buf;
1133         __le16 *curr_ptr = (__le16 *)skb->data;
1134         u16 pkt_len = le16_to_cpu(*curr_ptr);
1135         struct mwifiex_rxinfo *rx_info;
1136
1137         if (upld_typ != MWIFIEX_TYPE_AGGR_DATA) {
1138                 skb_trim(skb, pkt_len);
1139                 skb_pull(skb, INTF_HEADER_LEN);
1140         }
1141
1142         switch (upld_typ) {
1143         case MWIFIEX_TYPE_AGGR_DATA:
1144                 mwifiex_dbg(adapter, INFO,
1145                             "info: --- Rx: Aggr Data packet ---\n");
1146                 rx_info = MWIFIEX_SKB_RXCB(skb);
1147                 rx_info->buf_type = MWIFIEX_TYPE_AGGR_DATA;
1148                 if (adapter->rx_work_enabled) {
1149                         skb_queue_tail(&adapter->rx_data_q, skb);
1150                         atomic_inc(&adapter->rx_pending);
1151                         adapter->data_received = true;
1152                 } else {
1153                         mwifiex_deaggr_sdio_pkt(adapter, skb);
1154                         dev_kfree_skb_any(skb);
1155                 }
1156                 break;
1157
1158         case MWIFIEX_TYPE_DATA:
1159                 mwifiex_dbg(adapter, DATA,
1160                             "info: --- Rx: Data packet ---\n");
1161                 if (adapter->rx_work_enabled) {
1162                         skb_queue_tail(&adapter->rx_data_q, skb);
1163                         adapter->data_received = true;
1164                         atomic_inc(&adapter->rx_pending);
1165                 } else {
1166                         mwifiex_handle_rx_packet(adapter, skb);
1167                 }
1168                 break;
1169
1170         case MWIFIEX_TYPE_CMD:
1171                 mwifiex_dbg(adapter, CMD,
1172                             "info: --- Rx: Cmd Response ---\n");
1173                 /* take care of curr_cmd = NULL case */
1174                 if (!adapter->curr_cmd) {
1175                         cmd_buf = adapter->upld_buf;
1176
1177                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1178                                 mwifiex_process_sleep_confirm_resp(adapter,
1179                                                                    skb->data,
1180                                                                    skb->len);
1181
1182                         memcpy(cmd_buf, skb->data,
1183                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1184                                      skb->len));
1185
1186                         dev_kfree_skb_any(skb);
1187                 } else {
1188                         adapter->cmd_resp_received = true;
1189                         adapter->curr_cmd->resp_skb = skb;
1190                 }
1191                 break;
1192
1193         case MWIFIEX_TYPE_EVENT:
1194                 mwifiex_dbg(adapter, EVENT,
1195                             "info: --- Rx: Event ---\n");
1196                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1197
1198                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1199                         memcpy(adapter->event_body,
1200                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1201                                skb->len);
1202
1203                 /* event cause has been saved to adapter->event_cause */
1204                 adapter->event_received = true;
1205                 adapter->event_skb = skb;
1206
1207                 break;
1208
1209         default:
1210                 mwifiex_dbg(adapter, ERROR,
1211                             "unknown upload type %#x\n", upld_typ);
1212                 dev_kfree_skb_any(skb);
1213                 break;
1214         }
1215
1216         return 0;
1217 }
1218
1219 /*
1220  * This function transfers received packets from card to driver, performing
1221  * aggregation if required.
1222  *
1223  * For data received on control port, or if aggregation is disabled, the
1224  * received buffers are uploaded as separate packets. However, if aggregation
1225  * is enabled and required, the buffers are copied onto an aggregation buffer,
1226  * provided there is space left, processed and finally uploaded.
1227  */
1228 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1229                                              u16 rx_len, u8 port)
1230 {
1231         struct sdio_mmc_card *card = adapter->card;
1232         s32 f_do_rx_aggr = 0;
1233         s32 f_do_rx_cur = 0;
1234         s32 f_aggr_cur = 0;
1235         s32 f_post_aggr_cur = 0;
1236         struct sk_buff *skb_deaggr;
1237         struct sk_buff *skb = NULL;
1238         u32 pkt_len, pkt_type, mport, pind;
1239         u8 *curr_ptr;
1240
1241         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1242                 /* Read the command Resp without aggr */
1243                 mwifiex_dbg(adapter, CMD,
1244                             "info: %s: no aggregation for cmd\t"
1245                             "response\n", __func__);
1246
1247                 f_do_rx_cur = 1;
1248                 goto rx_curr_single;
1249         }
1250
1251         if (!card->mpa_rx.enabled) {
1252                 mwifiex_dbg(adapter, WARN,
1253                             "info: %s: rx aggregation disabled\n",
1254                             __func__);
1255
1256                 f_do_rx_cur = 1;
1257                 goto rx_curr_single;
1258         }
1259
1260         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1261                                          card->reg->data_port_mask)) ||
1262             (card->has_control_mask && (card->mp_rd_bitmap &
1263                                         (~((u32) CTRL_PORT_MASK))))) {
1264                 /* Some more data RX pending */
1265                 mwifiex_dbg(adapter, INFO,
1266                             "info: %s: not last packet\n", __func__);
1267
1268                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1269                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len)) {
1270                                 f_aggr_cur = 1;
1271                         } else {
1272                                 /* No room in Aggr buf, do rx aggr now */
1273                                 f_do_rx_aggr = 1;
1274                                 f_post_aggr_cur = 1;
1275                         }
1276                 } else {
1277                         /* Rx aggr not in progress */
1278                         f_aggr_cur = 1;
1279                 }
1280
1281         } else {
1282                 /* No more data RX pending */
1283                 mwifiex_dbg(adapter, INFO,
1284                             "info: %s: last packet\n", __func__);
1285
1286                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1287                         f_do_rx_aggr = 1;
1288                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len))
1289                                 f_aggr_cur = 1;
1290                         else
1291                                 /* No room in Aggr buf, do rx aggr now */
1292                                 f_do_rx_cur = 1;
1293                 } else {
1294                         f_do_rx_cur = 1;
1295                 }
1296         }
1297
1298         if (f_aggr_cur) {
1299                 mwifiex_dbg(adapter, INFO,
1300                             "info: current packet aggregation\n");
1301                 /* Curr pkt can be aggregated */
1302                 mp_rx_aggr_setup(card, rx_len, port);
1303
1304                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1305                     mp_rx_aggr_port_limit_reached(card)) {
1306                         mwifiex_dbg(adapter, INFO,
1307                                     "info: %s: aggregated packet\t"
1308                                     "limit reached\n", __func__);
1309                         /* No more pkts allowed in Aggr buf, rx it */
1310                         f_do_rx_aggr = 1;
1311                 }
1312         }
1313
1314         if (f_do_rx_aggr) {
1315                 /* do aggr RX now */
1316                 mwifiex_dbg(adapter, DATA,
1317                             "info: do_rx_aggr: num of packets: %d\n",
1318                             card->mpa_rx.pkt_cnt);
1319
1320                 if (card->supports_sdio_new_mode) {
1321                         int i;
1322                         u32 port_count;
1323
1324                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1325                                 if (card->mpa_rx.ports & BIT(i))
1326                                         port_count++;
1327
1328                         /* Reading data from "start_port + 0" to "start_port +
1329                          * port_count -1", so decrease the count by 1
1330                          */
1331                         port_count--;
1332                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1333                                  (port_count << 8)) + card->mpa_rx.start_port;
1334                 } else {
1335                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1336                                  (card->mpa_rx.ports << 4)) +
1337                                  card->mpa_rx.start_port;
1338                 }
1339
1340                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1341                                            card->mpa_rx.buf_len, mport, 1))
1342                         goto error;
1343
1344                 curr_ptr = card->mpa_rx.buf;
1345
1346                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1347                         u32 *len_arr = card->mpa_rx.len_arr;
1348
1349                         /* get curr PKT len & type */
1350                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1351                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1352
1353                         /* copy pkt to deaggr buf */
1354                         skb_deaggr = mwifiex_alloc_dma_align_buf(len_arr[pind],
1355                                                                  GFP_KERNEL |
1356                                                                  GFP_DMA);
1357                         if (!skb_deaggr) {
1358                                 mwifiex_dbg(adapter, ERROR, "skb allocation failure\t"
1359                                             "drop pkt len=%d type=%d\n",
1360                                             pkt_len, pkt_type);
1361                                 curr_ptr += len_arr[pind];
1362                                 continue;
1363                         }
1364
1365                         skb_put(skb_deaggr, len_arr[pind]);
1366
1367                         if ((pkt_type == MWIFIEX_TYPE_DATA ||
1368                              (pkt_type == MWIFIEX_TYPE_AGGR_DATA &&
1369                               adapter->sdio_rx_aggr_enable)) &&
1370                             (pkt_len <= len_arr[pind])) {
1371
1372                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1373
1374                                 skb_trim(skb_deaggr, pkt_len);
1375
1376                                 /* Process de-aggr packet */
1377                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1378                                                          pkt_type);
1379                         } else {
1380                                 mwifiex_dbg(adapter, ERROR,
1381                                             "drop wrong aggr pkt:\t"
1382                                             "sdio_single_port_rx_aggr=%d\t"
1383                                             "type=%d len=%d max_len=%d\n",
1384                                             adapter->sdio_rx_aggr_enable,
1385                                             pkt_type, pkt_len, len_arr[pind]);
1386                                 dev_kfree_skb_any(skb_deaggr);
1387                         }
1388                         curr_ptr += len_arr[pind];
1389                 }
1390                 MP_RX_AGGR_BUF_RESET(card);
1391         }
1392
1393 rx_curr_single:
1394         if (f_do_rx_cur) {
1395                 mwifiex_dbg(adapter, INFO, "info: RX: port: %d, rx_len: %d\n",
1396                             port, rx_len);
1397
1398                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1399                 if (!skb) {
1400                         mwifiex_dbg(adapter, ERROR,
1401                                     "single skb allocated fail,\t"
1402                                     "drop pkt port=%d len=%d\n", port, rx_len);
1403                         if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1404                                                       card->mpa_rx.buf, rx_len,
1405                                                       adapter->ioport + port))
1406                                 goto error;
1407                         return 0;
1408                 }
1409
1410                 skb_put(skb, rx_len);
1411
1412                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1413                                               skb->data, skb->len,
1414                                               adapter->ioport + port))
1415                         goto error;
1416                 if (!adapter->sdio_rx_aggr_enable &&
1417                     pkt_type == MWIFIEX_TYPE_AGGR_DATA) {
1418                         mwifiex_dbg(adapter, ERROR, "drop wrong pkt type %d\t"
1419                                     "current SDIO RX Aggr not enabled\n",
1420                                     pkt_type);
1421                         dev_kfree_skb_any(skb);
1422                         return 0;
1423                 }
1424
1425                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1426         }
1427         if (f_post_aggr_cur) {
1428                 mwifiex_dbg(adapter, INFO,
1429                             "info: current packet aggregation\n");
1430                 /* Curr pkt can be aggregated */
1431                 mp_rx_aggr_setup(card, rx_len, port);
1432         }
1433
1434         return 0;
1435 error:
1436         if (MP_RX_AGGR_IN_PROGRESS(card))
1437                 MP_RX_AGGR_BUF_RESET(card);
1438
1439         if (f_do_rx_cur && skb)
1440                 /* Single transfer pending. Free curr buff also */
1441                 dev_kfree_skb_any(skb);
1442
1443         return -1;
1444 }
1445
1446 /*
1447  * This function checks the current interrupt status.
1448  *
1449  * The following interrupts are checked and handled by this function -
1450  *      - Data sent
1451  *      - Command sent
1452  *      - Packets received
1453  *
1454  * Since the firmware does not generate download ready interrupt if the
1455  * port updated is command port only, command sent interrupt checking
1456  * should be done manually, and for every SDIO interrupt.
1457  *
1458  * In case of Rx packets received, the packets are uploaded from card to
1459  * host and processed accordingly.
1460  */
1461 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1462 {
1463         struct sdio_mmc_card *card = adapter->card;
1464         const struct mwifiex_sdio_card_reg *reg = card->reg;
1465         int ret = 0;
1466         u8 sdio_ireg;
1467         struct sk_buff *skb;
1468         u8 port = CTRL_PORT;
1469         u32 len_reg_l, len_reg_u;
1470         u32 rx_blocks;
1471         u16 rx_len;
1472         unsigned long flags;
1473         u32 bitmap;
1474         u8 cr;
1475
1476         spin_lock_irqsave(&adapter->int_lock, flags);
1477         sdio_ireg = adapter->int_status;
1478         adapter->int_status = 0;
1479         spin_unlock_irqrestore(&adapter->int_lock, flags);
1480
1481         if (!sdio_ireg)
1482                 return ret;
1483
1484         /* Following interrupt is only for SDIO new mode */
1485         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1486                 adapter->cmd_sent = false;
1487
1488         /* Following interrupt is only for SDIO new mode */
1489         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1490                 u32 pkt_type;
1491
1492                 /* read the len of control packet */
1493                 rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
1494                 rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
1495                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1496                 if (rx_len <= INTF_HEADER_LEN ||
1497                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1498                      MWIFIEX_RX_DATA_BUF_SIZE)
1499                         return -1;
1500                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1501                 mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n", rx_len);
1502
1503                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1504                 if (!skb)
1505                         return -1;
1506
1507                 skb_put(skb, rx_len);
1508
1509                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1510                                               skb->len, adapter->ioport |
1511                                                         CMD_PORT_SLCT)) {
1512                         mwifiex_dbg(adapter, ERROR,
1513                                     "%s: failed to card_to_host", __func__);
1514                         dev_kfree_skb_any(skb);
1515                         goto term_cmd;
1516                 }
1517
1518                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1519                     (pkt_type != MWIFIEX_TYPE_EVENT))
1520                         mwifiex_dbg(adapter, ERROR,
1521                                     "%s:Received wrong packet on cmd port",
1522                                     __func__);
1523
1524                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1525         }
1526
1527         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1528                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1529                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1530                 if (card->supports_sdio_new_mode) {
1531                         bitmap |=
1532                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1533                         bitmap |=
1534                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1535                 }
1536                 card->mp_wr_bitmap = bitmap;
1537
1538                 mwifiex_dbg(adapter, INTR,
1539                             "int: DNLD: wr_bitmap=0x%x\n",
1540                             card->mp_wr_bitmap);
1541                 if (adapter->data_sent &&
1542                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1543                         mwifiex_dbg(adapter, INTR,
1544                                     "info:  <--- Tx DONE Interrupt --->\n");
1545                         adapter->data_sent = false;
1546                 }
1547         }
1548
1549         /* As firmware will not generate download ready interrupt if the port
1550            updated is command port only, cmd_sent should be done for any SDIO
1551            interrupt. */
1552         if (card->has_control_mask && adapter->cmd_sent) {
1553                 /* Check if firmware has attach buffer at command port and
1554                    update just that in wr_bit_map. */
1555                 card->mp_wr_bitmap |=
1556                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1557                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1558                         adapter->cmd_sent = false;
1559         }
1560
1561         mwifiex_dbg(adapter, INTR, "info: cmd_sent=%d data_sent=%d\n",
1562                     adapter->cmd_sent, adapter->data_sent);
1563         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1564                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1565                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1566                 if (card->supports_sdio_new_mode) {
1567                         bitmap |=
1568                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1569                         bitmap |=
1570                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1571                 }
1572                 card->mp_rd_bitmap = bitmap;
1573                 mwifiex_dbg(adapter, INTR,
1574                             "int: UPLD: rd_bitmap=0x%x\n",
1575                             card->mp_rd_bitmap);
1576
1577                 while (true) {
1578                         ret = mwifiex_get_rd_port(adapter, &port);
1579                         if (ret) {
1580                                 mwifiex_dbg(adapter, INFO,
1581                                             "info: no more rd_port available\n");
1582                                 break;
1583                         }
1584                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1585                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1586                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1587                         rx_len |= (u16) card->mp_regs[len_reg_l];
1588                         mwifiex_dbg(adapter, INFO,
1589                                     "info: RX: port=%d rx_len=%u\n",
1590                                     port, rx_len);
1591                         rx_blocks =
1592                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1593                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1594                         if (rx_len <= INTF_HEADER_LEN ||
1595                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1596                              card->mpa_rx.buf_size) {
1597                                 mwifiex_dbg(adapter, ERROR,
1598                                             "invalid rx_len=%d\n",
1599                                             rx_len);
1600                                 return -1;
1601                         }
1602
1603                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1604                         mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n",
1605                                     rx_len);
1606
1607                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, rx_len,
1608                                                               port)) {
1609                                 mwifiex_dbg(adapter, ERROR,
1610                                             "card_to_host_mpa failed: int status=%#x\n",
1611                                             sdio_ireg);
1612                                 goto term_cmd;
1613                         }
1614                 }
1615         }
1616
1617         return 0;
1618
1619 term_cmd:
1620         /* terminate cmd */
1621         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1622                 mwifiex_dbg(adapter, ERROR, "read CFG reg failed\n");
1623         else
1624                 mwifiex_dbg(adapter, INFO,
1625                             "info: CFG reg val = %d\n", cr);
1626
1627         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1628                 mwifiex_dbg(adapter, ERROR,
1629                             "write CFG reg failed\n");
1630         else
1631                 mwifiex_dbg(adapter, INFO, "info: write success\n");
1632
1633         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1634                 mwifiex_dbg(adapter, ERROR,
1635                             "read CFG reg failed\n");
1636         else
1637                 mwifiex_dbg(adapter, INFO,
1638                             "info: CFG reg val =%x\n", cr);
1639
1640         return -1;
1641 }
1642
1643 /*
1644  * This function aggregates transmission buffers in driver and downloads
1645  * the aggregated packet to card.
1646  *
1647  * The individual packets are aggregated by copying into an aggregation
1648  * buffer and then downloaded to the card. Previous unsent packets in the
1649  * aggregation buffer are pre-copied first before new packets are added.
1650  * Aggregation is done till there is space left in the aggregation buffer,
1651  * or till new packets are available.
1652  *
1653  * The function will only download the packet to the card when aggregation
1654  * stops, otherwise it will just aggregate the packet in aggregation buffer
1655  * and return.
1656  */
1657 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1658                                         u8 *payload, u32 pkt_len, u32 port,
1659                                         u32 next_pkt_len)
1660 {
1661         struct sdio_mmc_card *card = adapter->card;
1662         int ret = 0;
1663         s32 f_send_aggr_buf = 0;
1664         s32 f_send_cur_buf = 0;
1665         s32 f_precopy_cur_buf = 0;
1666         s32 f_postcopy_cur_buf = 0;
1667         u32 mport;
1668
1669         if (!card->mpa_tx.enabled ||
1670             (card->has_control_mask && (port == CTRL_PORT)) ||
1671             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1672                 mwifiex_dbg(adapter, WARN,
1673                             "info: %s: tx aggregation disabled\n",
1674                             __func__);
1675
1676                 f_send_cur_buf = 1;
1677                 goto tx_curr_single;
1678         }
1679
1680         if (next_pkt_len) {
1681                 /* More pkt in TX queue */
1682                 mwifiex_dbg(adapter, INFO,
1683                             "info: %s: more packets in queue.\n",
1684                             __func__);
1685
1686                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1687                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1688                                 f_precopy_cur_buf = 1;
1689
1690                                 if (!(card->mp_wr_bitmap &
1691                                       (1 << card->curr_wr_port)) ||
1692                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1693                                             card, pkt_len + next_pkt_len))
1694                                         f_send_aggr_buf = 1;
1695                         } else {
1696                                 /* No room in Aggr buf, send it */
1697                                 f_send_aggr_buf = 1;
1698
1699                                 if (!(card->mp_wr_bitmap &
1700                                       (1 << card->curr_wr_port)))
1701                                         f_send_cur_buf = 1;
1702                                 else
1703                                         f_postcopy_cur_buf = 1;
1704                         }
1705                 } else {
1706                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1707                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1708                                 f_precopy_cur_buf = 1;
1709                         else
1710                                 f_send_cur_buf = 1;
1711                 }
1712         } else {
1713                 /* Last pkt in TX queue */
1714                 mwifiex_dbg(adapter, INFO,
1715                             "info: %s: Last packet in Tx Queue.\n",
1716                             __func__);
1717
1718                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1719                         /* some packs in Aggr buf already */
1720                         f_send_aggr_buf = 1;
1721
1722                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1723                                 f_precopy_cur_buf = 1;
1724                         else
1725                                 /* No room in Aggr buf, send it */
1726                                 f_send_cur_buf = 1;
1727                 } else {
1728                         f_send_cur_buf = 1;
1729                 }
1730         }
1731
1732         if (f_precopy_cur_buf) {
1733                 mwifiex_dbg(adapter, DATA,
1734                             "data: %s: precopy current buffer\n",
1735                             __func__);
1736                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1737
1738                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1739                     mp_tx_aggr_port_limit_reached(card))
1740                         /* No more pkts allowed in Aggr buf, send it */
1741                         f_send_aggr_buf = 1;
1742         }
1743
1744         if (f_send_aggr_buf) {
1745                 mwifiex_dbg(adapter, DATA,
1746                             "data: %s: send aggr buffer: %d %d\n",
1747                             __func__, card->mpa_tx.start_port,
1748                             card->mpa_tx.ports);
1749                 if (card->supports_sdio_new_mode) {
1750                         u32 port_count;
1751                         int i;
1752
1753                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1754                                 if (card->mpa_tx.ports & BIT(i))
1755                                         port_count++;
1756
1757                         /* Writing data from "start_port + 0" to "start_port +
1758                          * port_count -1", so decrease the count by 1
1759                          */
1760                         port_count--;
1761                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1762                                  (port_count << 8)) + card->mpa_tx.start_port;
1763                 } else {
1764                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1765                                  (card->mpa_tx.ports << 4)) +
1766                                  card->mpa_tx.start_port;
1767                 }
1768
1769                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1770                                                  card->mpa_tx.buf_len, mport);
1771
1772                 MP_TX_AGGR_BUF_RESET(card);
1773         }
1774
1775 tx_curr_single:
1776         if (f_send_cur_buf) {
1777                 mwifiex_dbg(adapter, DATA,
1778                             "data: %s: send current buffer %d\n",
1779                             __func__, port);
1780                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1781                                                  adapter->ioport + port);
1782         }
1783
1784         if (f_postcopy_cur_buf) {
1785                 mwifiex_dbg(adapter, DATA,
1786                             "data: %s: postcopy current buffer\n",
1787                             __func__);
1788                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1789         }
1790
1791         return ret;
1792 }
1793
1794 /*
1795  * This function downloads data from driver to card.
1796  *
1797  * Both commands and data packets are transferred to the card by this
1798  * function.
1799  *
1800  * This function adds the SDIO specific header to the front of the buffer
1801  * before transferring. The header contains the length of the packet and
1802  * the type. The firmware handles the packets based upon this set type.
1803  */
1804 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1805                                      u8 type, struct sk_buff *skb,
1806                                      struct mwifiex_tx_param *tx_param)
1807 {
1808         struct sdio_mmc_card *card = adapter->card;
1809         int ret;
1810         u32 buf_block_len;
1811         u32 blk_size;
1812         u32 port = CTRL_PORT;
1813         u8 *payload = (u8 *)skb->data;
1814         u32 pkt_len = skb->len;
1815
1816         /* Allocate buffer and copy payload */
1817         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1818         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1819         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1820         *(__le16 *)&payload[2] = cpu_to_le16(type);
1821
1822         /*
1823          * This is SDIO specific header
1824          *  u16 length,
1825          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1826          *  MWIFIEX_TYPE_EVENT = 3)
1827          */
1828         if (type == MWIFIEX_TYPE_DATA) {
1829                 ret = mwifiex_get_wr_port_data(adapter, &port);
1830                 if (ret) {
1831                         mwifiex_dbg(adapter, ERROR,
1832                                     "%s: no wr_port available\n",
1833                                     __func__);
1834                         return ret;
1835                 }
1836         } else {
1837                 adapter->cmd_sent = true;
1838                 /* Type must be MWIFIEX_TYPE_CMD */
1839
1840                 if (pkt_len <= INTF_HEADER_LEN ||
1841                     pkt_len > MWIFIEX_UPLD_SIZE)
1842                         mwifiex_dbg(adapter, ERROR,
1843                                     "%s: payload=%p, nb=%d\n",
1844                                     __func__, payload, pkt_len);
1845
1846                 if (card->supports_sdio_new_mode)
1847                         port = CMD_PORT_SLCT;
1848         }
1849
1850         /* Transfer data to card */
1851         pkt_len = buf_block_len * blk_size;
1852
1853         if (tx_param)
1854                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1855                                                    port, tx_param->next_pkt_len
1856                                                    );
1857         else
1858                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1859                                                    port, 0);
1860
1861         if (ret) {
1862                 if (type == MWIFIEX_TYPE_CMD)
1863                         adapter->cmd_sent = false;
1864                 if (type == MWIFIEX_TYPE_DATA) {
1865                         adapter->data_sent = false;
1866                         /* restore curr_wr_port in error cases */
1867                         card->curr_wr_port = port;
1868                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1869                 }
1870         } else {
1871                 if (type == MWIFIEX_TYPE_DATA) {
1872                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1873                                 adapter->data_sent = true;
1874                         else
1875                                 adapter->data_sent = false;
1876                 }
1877         }
1878
1879         return ret;
1880 }
1881
1882 /*
1883  * This function allocates the MPA Tx and Rx buffers.
1884  */
1885 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1886                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1887 {
1888         struct sdio_mmc_card *card = adapter->card;
1889         u32 rx_buf_size;
1890         int ret = 0;
1891
1892         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1893         if (!card->mpa_tx.buf) {
1894                 ret = -1;
1895                 goto error;
1896         }
1897
1898         card->mpa_tx.buf_size = mpa_tx_buf_size;
1899
1900         rx_buf_size = max_t(u32, mpa_rx_buf_size,
1901                             (u32)SDIO_MAX_AGGR_BUF_SIZE);
1902         card->mpa_rx.buf = kzalloc(rx_buf_size, GFP_KERNEL);
1903         if (!card->mpa_rx.buf) {
1904                 ret = -1;
1905                 goto error;
1906         }
1907
1908         card->mpa_rx.buf_size = rx_buf_size;
1909
1910 error:
1911         if (ret) {
1912                 kfree(card->mpa_tx.buf);
1913                 kfree(card->mpa_rx.buf);
1914         }
1915
1916         return ret;
1917 }
1918
1919 /*
1920  * This function unregisters the SDIO device.
1921  *
1922  * The SDIO IRQ is released, the function is disabled and driver
1923  * data is set to null.
1924  */
1925 static void
1926 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1927 {
1928         struct sdio_mmc_card *card = adapter->card;
1929
1930         if (adapter->card) {
1931                 sdio_claim_host(card->func);
1932                 sdio_disable_func(card->func);
1933                 sdio_release_host(card->func);
1934         }
1935 }
1936
1937 /*
1938  * This function registers the SDIO device.
1939  *
1940  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1941  */
1942 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1943 {
1944         int ret;
1945         struct sdio_mmc_card *card = adapter->card;
1946         struct sdio_func *func = card->func;
1947
1948         /* save adapter pointer in card */
1949         card->adapter = adapter;
1950         adapter->tx_buf_size = card->tx_buf_size;
1951
1952         sdio_claim_host(func);
1953
1954         /* Set block size */
1955         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1956         sdio_release_host(func);
1957         if (ret) {
1958                 mwifiex_dbg(adapter, ERROR,
1959                             "cannot set SDIO block size\n");
1960                 return ret;
1961         }
1962
1963
1964         adapter->dev = &func->dev;
1965
1966         strcpy(adapter->fw_name, card->firmware);
1967         adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1968         adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1969
1970         return 0;
1971 }
1972
1973 /*
1974  * This function initializes the SDIO driver.
1975  *
1976  * The following initializations steps are followed -
1977  *      - Read the Host interrupt status register to acknowledge
1978  *        the first interrupt got from bootloader
1979  *      - Disable host interrupt mask register
1980  *      - Get SDIO port
1981  *      - Initialize SDIO variables in card
1982  *      - Allocate MP registers
1983  *      - Allocate MPA Tx and Rx buffers
1984  */
1985 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1986 {
1987         struct sdio_mmc_card *card = adapter->card;
1988         const struct mwifiex_sdio_card_reg *reg = card->reg;
1989         int ret;
1990         u8 sdio_ireg;
1991
1992         sdio_set_drvdata(card->func, card);
1993
1994         /*
1995          * Read the host_int_status_reg for ACK the first interrupt got
1996          * from the bootloader. If we don't do this we get a interrupt
1997          * as soon as we register the irq.
1998          */
1999         mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
2000
2001         /* Get SDIO ioport */
2002         mwifiex_init_sdio_ioport(adapter);
2003
2004         /* Initialize SDIO variables in card */
2005         card->mp_rd_bitmap = 0;
2006         card->mp_wr_bitmap = 0;
2007         card->curr_rd_port = reg->start_rd_port;
2008         card->curr_wr_port = reg->start_wr_port;
2009
2010         card->mp_data_port_mask = reg->data_port_mask;
2011
2012         card->mpa_tx.buf_len = 0;
2013         card->mpa_tx.pkt_cnt = 0;
2014         card->mpa_tx.start_port = 0;
2015
2016         card->mpa_tx.enabled = 1;
2017         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2018
2019         card->mpa_rx.buf_len = 0;
2020         card->mpa_rx.pkt_cnt = 0;
2021         card->mpa_rx.start_port = 0;
2022
2023         card->mpa_rx.enabled = 1;
2024         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2025
2026         /* Allocate buffers for SDIO MP-A */
2027         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
2028         if (!card->mp_regs)
2029                 return -ENOMEM;
2030
2031         /* Allocate skb pointer buffers */
2032         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
2033                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2034         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
2035                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2036         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
2037                                              card->mp_tx_agg_buf_size,
2038                                              card->mp_rx_agg_buf_size);
2039         if (ret) {
2040                 mwifiex_dbg(adapter, ERROR,
2041                             "failed to alloc sdio mp-a buffers\n");
2042                 kfree(card->mp_regs);
2043                 return -1;
2044         }
2045
2046         adapter->auto_tdls = card->can_auto_tdls;
2047         adapter->ext_scan = card->can_ext_scan;
2048         return ret;
2049 }
2050
2051 /*
2052  * This function resets the MPA Tx and Rx buffers.
2053  */
2054 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
2055 {
2056         struct sdio_mmc_card *card = adapter->card;
2057
2058         MP_TX_AGGR_BUF_RESET(card);
2059         MP_RX_AGGR_BUF_RESET(card);
2060 }
2061
2062 /*
2063  * This function cleans up the allocated card buffers.
2064  *
2065  * The following are freed by this function -
2066  *      - MP registers
2067  *      - MPA Tx buffer
2068  *      - MPA Rx buffer
2069  */
2070 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
2071 {
2072         struct sdio_mmc_card *card = adapter->card;
2073
2074         kfree(card->mp_regs);
2075         kfree(card->mpa_rx.skb_arr);
2076         kfree(card->mpa_rx.len_arr);
2077         kfree(card->mpa_tx.buf);
2078         kfree(card->mpa_rx.buf);
2079         sdio_set_drvdata(card->func, NULL);
2080         kfree(card);
2081 }
2082
2083 /*
2084  * This function updates the MP end port in card.
2085  */
2086 static void
2087 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
2088 {
2089         struct sdio_mmc_card *card = adapter->card;
2090         const struct mwifiex_sdio_card_reg *reg = card->reg;
2091         int i;
2092
2093         card->mp_end_port = port;
2094
2095         card->mp_data_port_mask = reg->data_port_mask;
2096
2097         if (reg->start_wr_port) {
2098                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
2099                         card->mp_data_port_mask &=
2100                                         ~(1 << (card->max_ports - i));
2101         }
2102
2103         card->curr_wr_port = reg->start_wr_port;
2104
2105         mwifiex_dbg(adapter, CMD,
2106                     "cmd: mp_end_port %d, data port mask 0x%x\n",
2107                     port, card->mp_data_port_mask);
2108 }
2109
2110 static struct mwifiex_adapter *save_adapter;
2111 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
2112 {
2113         struct sdio_mmc_card *card = adapter->card;
2114         struct mmc_host *target = card->func->card->host;
2115
2116         /* The actual reset operation must be run outside of driver thread.
2117          * This is because mmc_remove_host() will cause the device to be
2118          * instantly destroyed, and the driver then needs to end its thread,
2119          * leading to a deadlock.
2120          *
2121          * We run it in a totally independent workqueue.
2122          */
2123
2124         mwifiex_dbg(adapter, WARN, "Resetting card...\n");
2125         mmc_remove_host(target);
2126         /* 200ms delay is based on experiment with sdhci controller */
2127         mdelay(200);
2128         target->rescan_entered = 0; /* rescan non-removable cards */
2129         mmc_add_host(target);
2130 }
2131
2132 /* This function read/write firmware */
2133 static enum
2134 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
2135                                        u8 doneflag)
2136 {
2137         struct sdio_mmc_card *card = adapter->card;
2138         int ret, tries;
2139         u8 ctrl_data = 0;
2140
2141         sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
2142                     &ret);
2143         if (ret) {
2144                 mwifiex_dbg(adapter, ERROR, "SDIO Write ERR\n");
2145                 return RDWR_STATUS_FAILURE;
2146         }
2147         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2148                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
2149                                        &ret);
2150                 if (ret) {
2151                         mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2152                         return RDWR_STATUS_FAILURE;
2153                 }
2154                 if (ctrl_data == FW_DUMP_DONE)
2155                         break;
2156                 if (doneflag && ctrl_data == doneflag)
2157                         return RDWR_STATUS_DONE;
2158                 if (ctrl_data != FW_DUMP_HOST_READY) {
2159                         mwifiex_dbg(adapter, WARN,
2160                                     "The ctrl reg was changed, re-try again!\n");
2161                         sdio_writeb(card->func, FW_DUMP_HOST_READY,
2162                                     card->reg->fw_dump_ctrl, &ret);
2163                         if (ret) {
2164                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2165                                 return RDWR_STATUS_FAILURE;
2166                         }
2167                 }
2168                 usleep_range(100, 200);
2169         }
2170         if (ctrl_data == FW_DUMP_HOST_READY) {
2171                 mwifiex_dbg(adapter, ERROR,
2172                             "Fail to pull ctrl_data\n");
2173                 return RDWR_STATUS_FAILURE;
2174         }
2175
2176         return RDWR_STATUS_SUCCESS;
2177 }
2178
2179 /* This function dump firmware memory to file */
2180 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2181 {
2182         struct sdio_mmc_card *card = adapter->card;
2183         int ret = 0;
2184         unsigned int reg, reg_start, reg_end;
2185         u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2186         enum rdwr_status stat;
2187         u32 memory_size;
2188
2189         if (!card->can_dump_fw)
2190                 return;
2191
2192         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2193                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2194
2195                 if (entry->mem_ptr) {
2196                         vfree(entry->mem_ptr);
2197                         entry->mem_ptr = NULL;
2198                 }
2199                 entry->mem_size = 0;
2200         }
2201
2202         mwifiex_pm_wakeup_card(adapter);
2203         sdio_claim_host(card->func);
2204
2205         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2206
2207         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2208         if (stat == RDWR_STATUS_FAILURE)
2209                 goto done;
2210
2211         reg = card->reg->fw_dump_start;
2212         /* Read the number of the memories which will dump */
2213         dump_num = sdio_readb(card->func, reg, &ret);
2214         if (ret) {
2215                 mwifiex_dbg(adapter, ERROR, "SDIO read memory length err\n");
2216                 goto done;
2217         }
2218
2219         /* Read the length of every memory which will dump */
2220         for (idx = 0; idx < dump_num; idx++) {
2221                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2222
2223                 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2224                 if (stat == RDWR_STATUS_FAILURE)
2225                         goto done;
2226
2227                 memory_size = 0;
2228                 reg = card->reg->fw_dump_start;
2229                 for (i = 0; i < 4; i++) {
2230                         read_reg = sdio_readb(card->func, reg, &ret);
2231                         if (ret) {
2232                                 mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2233                                 goto done;
2234                         }
2235                         memory_size |= (read_reg << i*8);
2236                         reg++;
2237                 }
2238
2239                 if (memory_size == 0) {
2240                         mwifiex_dbg(adapter, DUMP, "Firmware dump Finished!\n");
2241                         ret = mwifiex_write_reg(adapter,
2242                                                 card->reg->fw_dump_ctrl,
2243                                                 FW_DUMP_READ_DONE);
2244                         if (ret) {
2245                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2246                                 return;
2247                         }
2248                         break;
2249                 }
2250
2251                 mwifiex_dbg(adapter, DUMP,
2252                             "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2253                 entry->mem_ptr = vmalloc(memory_size + 1);
2254                 entry->mem_size = memory_size;
2255                 if (!entry->mem_ptr) {
2256                         mwifiex_dbg(adapter, ERROR, "Vmalloc %s failed\n",
2257                                     entry->mem_name);
2258                         goto done;
2259                 }
2260                 dbg_ptr = entry->mem_ptr;
2261                 end_ptr = dbg_ptr + memory_size;
2262
2263                 doneflag = entry->done_flag;
2264                 mwifiex_dbg(adapter, DUMP,
2265                             "Start %s output, please wait...\n",
2266                             entry->mem_name);
2267
2268                 do {
2269                         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2270                         if (stat == RDWR_STATUS_FAILURE)
2271                                 goto done;
2272
2273                         reg_start = card->reg->fw_dump_start;
2274                         reg_end = card->reg->fw_dump_end;
2275                         for (reg = reg_start; reg <= reg_end; reg++) {
2276                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2277                                 if (ret) {
2278                                         mwifiex_dbg(adapter, ERROR,
2279                                                     "SDIO read err\n");
2280                                         goto done;
2281                                 }
2282                                 if (dbg_ptr < end_ptr)
2283                                         dbg_ptr++;
2284                                 else
2285                                         mwifiex_dbg(adapter, ERROR,
2286                                                     "Allocated buf not enough\n");
2287                         }
2288
2289                         if (stat != RDWR_STATUS_DONE)
2290                                 continue;
2291
2292                         mwifiex_dbg(adapter, DUMP, "%s done: size=0x%tx\n",
2293                                     entry->mem_name, dbg_ptr - entry->mem_ptr);
2294                         break;
2295                 } while (1);
2296         }
2297         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2298
2299 done:
2300         sdio_release_host(card->func);
2301 }
2302
2303 static void mwifiex_sdio_device_dump_work(struct mwifiex_adapter *adapter)
2304 {
2305         mwifiex_drv_info_dump(adapter);
2306         mwifiex_sdio_fw_dump(adapter);
2307         mwifiex_upload_device_dump(adapter);
2308 }
2309
2310 static void mwifiex_sdio_work(struct work_struct *work)
2311 {
2312         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP,
2313                                &iface_work_flags))
2314                 mwifiex_sdio_device_dump_work(save_adapter);
2315         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2316                                &iface_work_flags))
2317                 mwifiex_sdio_card_reset_work(save_adapter);
2318 }
2319
2320 static DECLARE_WORK(sdio_work, mwifiex_sdio_work);
2321 /* This function resets the card */
2322 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2323 {
2324         save_adapter = adapter;
2325         if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags))
2326                 return;
2327
2328         set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);
2329
2330         schedule_work(&sdio_work);
2331 }
2332
2333 /* This function dumps FW information */
2334 static void mwifiex_sdio_device_dump(struct mwifiex_adapter *adapter)
2335 {
2336         save_adapter = adapter;
2337         if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags))
2338                 return;
2339
2340         set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags);
2341         schedule_work(&sdio_work);
2342 }
2343
2344 /* Function to dump SDIO function registers and SDIO scratch registers in case
2345  * of FW crash
2346  */
2347 static int
2348 mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
2349 {
2350         char *p = drv_buf;
2351         struct sdio_mmc_card *cardp = adapter->card;
2352         int ret = 0;
2353         u8 count, func, data, index = 0, size = 0;
2354         u8 reg, reg_start, reg_end;
2355         char buf[256], *ptr;
2356
2357         if (!p)
2358                 return 0;
2359
2360         mwifiex_dbg(adapter, MSG, "SDIO register dump start\n");
2361
2362         mwifiex_pm_wakeup_card(adapter);
2363
2364         sdio_claim_host(cardp->func);
2365
2366         for (count = 0; count < 5; count++) {
2367                 memset(buf, 0, sizeof(buf));
2368                 ptr = buf;
2369
2370                 switch (count) {
2371                 case 0:
2372                         /* Read the registers of SDIO function0 */
2373                         func = count;
2374                         reg_start = 0;
2375                         reg_end = 9;
2376                         break;
2377                 case 1:
2378                         /* Read the registers of SDIO function1 */
2379                         func = count;
2380                         reg_start = cardp->reg->func1_dump_reg_start;
2381                         reg_end = cardp->reg->func1_dump_reg_end;
2382                         break;
2383                 case 2:
2384                         index = 0;
2385                         func = 1;
2386                         reg_start = cardp->reg->func1_spec_reg_table[index++];
2387                         size = cardp->reg->func1_spec_reg_num;
2388                         reg_end = cardp->reg->func1_spec_reg_table[size-1];
2389                         break;
2390                 default:
2391                         /* Read the scratch registers of SDIO function1 */
2392                         if (count == 4)
2393                                 mdelay(100);
2394                         func = 1;
2395                         reg_start = cardp->reg->func1_scratch_reg;
2396                         reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
2397                 }
2398
2399                 if (count != 2)
2400                         ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
2401                                        func, reg_start, reg_end);
2402                 else
2403                         ptr += sprintf(ptr, "SDIO Func%d: ", func);
2404
2405                 for (reg = reg_start; reg <= reg_end;) {
2406                         if (func == 0)
2407                                 data = sdio_f0_readb(cardp->func, reg, &ret);
2408                         else
2409                                 data = sdio_readb(cardp->func, reg, &ret);
2410
2411                         if (count == 2)
2412                                 ptr += sprintf(ptr, "(%#x) ", reg);
2413                         if (!ret) {
2414                                 ptr += sprintf(ptr, "%02x ", data);
2415                         } else {
2416                                 ptr += sprintf(ptr, "ERR");
2417                                 break;
2418                         }
2419
2420                         if (count == 2 && reg < reg_end)
2421                                 reg = cardp->reg->func1_spec_reg_table[index++];
2422                         else
2423                                 reg++;
2424                 }
2425
2426                 mwifiex_dbg(adapter, MSG, "%s\n", buf);
2427                 p += sprintf(p, "%s\n", buf);
2428         }
2429
2430         sdio_release_host(cardp->func);
2431
2432         mwifiex_dbg(adapter, MSG, "SDIO register dump end\n");
2433
2434         return p - drv_buf;
2435 }
2436
2437 static struct mwifiex_if_ops sdio_ops = {
2438         .init_if = mwifiex_init_sdio,
2439         .cleanup_if = mwifiex_cleanup_sdio,
2440         .check_fw_status = mwifiex_check_fw_status,
2441         .prog_fw = mwifiex_prog_fw_w_helper,
2442         .register_dev = mwifiex_register_dev,
2443         .unregister_dev = mwifiex_unregister_dev,
2444         .enable_int = mwifiex_sdio_enable_host_int,
2445         .disable_int = mwifiex_sdio_disable_host_int,
2446         .process_int_status = mwifiex_process_int_status,
2447         .host_to_card = mwifiex_sdio_host_to_card,
2448         .wakeup = mwifiex_pm_wakeup_card,
2449         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2450
2451         /* SDIO specific */
2452         .update_mp_end_port = mwifiex_update_mp_end_port,
2453         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2454         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2455         .event_complete = mwifiex_sdio_event_complete,
2456         .card_reset = mwifiex_sdio_card_reset,
2457         .reg_dump = mwifiex_sdio_reg_dump,
2458         .device_dump = mwifiex_sdio_device_dump,
2459         .deaggr_pkt = mwifiex_deaggr_sdio_pkt,
2460 };
2461
2462 /*
2463  * This function initializes the SDIO driver.
2464  *
2465  * This initiates the semaphore and registers the device with
2466  * SDIO bus.
2467  */
2468 static int
2469 mwifiex_sdio_init_module(void)
2470 {
2471         sema_init(&add_remove_card_sem, 1);
2472
2473         /* Clear the flag in case user removes the card. */
2474         user_rmmod = 0;
2475
2476         return sdio_register_driver(&mwifiex_sdio);
2477 }
2478
2479 /*
2480  * This function cleans up the SDIO driver.
2481  *
2482  * The following major steps are followed for cleanup -
2483  *      - Resume the device if its suspended
2484  *      - Disconnect the device if connected
2485  *      - Shutdown the firmware
2486  *      - Unregister the device from SDIO bus.
2487  */
2488 static void
2489 mwifiex_sdio_cleanup_module(void)
2490 {
2491         if (!down_interruptible(&add_remove_card_sem))
2492                 up(&add_remove_card_sem);
2493
2494         /* Set the flag as user is removing this module. */
2495         user_rmmod = 1;
2496         cancel_work_sync(&sdio_work);
2497
2498         sdio_unregister_driver(&mwifiex_sdio);
2499 }
2500
2501 module_init(mwifiex_sdio_init_module);
2502 module_exit(mwifiex_sdio_cleanup_module);
2503
2504 MODULE_AUTHOR("Marvell International Ltd.");
2505 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2506 MODULE_VERSION(SDIO_VERSION);
2507 MODULE_LICENSE("GPL v2");
2508 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2509 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2510 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2511 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2512 MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);