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 generic_mem_type_map[] = {
  55         {"DUMP", NULL, 0, 0xDD},
  56 };
  57
  58 static struct memory_type_mapping mem_type_mapping_tbl[] = {
  59         {"ITCM", NULL, 0, 0xF0},
  60         {"DTCM", NULL, 0, 0xF1},
  61         {"SQRAM", NULL, 0, 0xF2},
  62         {"APU", NULL, 0, 0xF3},
  63         {"CIU", NULL, 0, 0xF4},
  64         {"ICU", NULL, 0, 0xF5},
  65         {"MAC", NULL, 0, 0xF6},
  66         {"EXT7", NULL, 0, 0xF7},
  67         {"EXT8", NULL, 0, 0xF8},
  68         {"EXT9", NULL, 0, 0xF9},
  69         {"EXT10", NULL, 0, 0xFA},
  70         {"EXT11", NULL, 0, 0xFB},
  71         {"EXT12", NULL, 0, 0xFC},
  72         {"EXT13", NULL, 0, 0xFD},
  73         {"EXTLAST", NULL, 0, 0xFE},
  74 };
  75
  76 /*
  77  * SDIO probe.
  78  *
  79  * This function probes an mwifiex device and registers it. It allocates
  80  * the card structure, enables SDIO function number and initiates the
  81  * device registration and initialization procedure by adding a logical
  82  * interface.
  83  */
  84 static int
  85 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
  86 {
  87         int ret;
  88         struct sdio_mmc_card *card = NULL;
  89
  90         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
  91                  func->vendor, func->device, func->class, func->num);
  92
  93         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
  94         if (!card)
  95                 return -ENOMEM;
  96
  97         card->func = func;
  98         card->device_id = id;
  99
 100         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 101
 102         if (id->driver_data) {
 103                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
 104
 105                 card->firmware = data->firmware;
 106                 card->reg = data->reg;
 107                 card->max_ports = data->max_ports;
 108                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
 109                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
 110                 card->has_control_mask = data->has_control_mask;
 111                 card->tx_buf_size = data->tx_buf_size;
 112                 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
 113                 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
 114                 card->can_dump_fw = data->can_dump_fw;
 115                 card->fw_dump_enh = data->fw_dump_enh;
 116                 card->can_auto_tdls = data->can_auto_tdls;
 117                 card->can_ext_scan = data->can_ext_scan;
 118         }
 119
 120         sdio_claim_host(func);
 121         ret = sdio_enable_func(func);
 122         sdio_release_host(func);
 123
 124         if (ret) {
 125                 pr_err("%s: failed to enable function\n", __func__);
 126                 kfree(card);
 127                 return -EIO;
 128         }
 129
 130         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
 131                              MWIFIEX_SDIO)) {
 132                 pr_err("%s: add card failed\n", __func__);
 133                 kfree(card);
 134                 sdio_claim_host(func);
 135                 ret = sdio_disable_func(func);
 136                 sdio_release_host(func);
 137                 ret = -1;
 138         }
 139
 140         return ret;
 141 }
 142
 143 /*
 144  * SDIO resume.
 145  *
 146  * Kernel needs to suspend all functions separately. Therefore all
 147  * registered functions must have drivers with suspend and resume
 148  * methods. Failing that the kernel simply removes the whole card.
 149  *
 150  * If already not resumed, this function turns on the traffic and
 151  * sends a host sleep cancel request to the firmware.
 152  */
 153 static int mwifiex_sdio_resume(struct device *dev)
 154 {
 155         struct sdio_func *func = dev_to_sdio_func(dev);
 156         struct sdio_mmc_card *card;
 157         struct mwifiex_adapter *adapter;
 158         mmc_pm_flag_t pm_flag = 0;
 159
 160         if (func) {
 161                 pm_flag = sdio_get_host_pm_caps(func);
 162                 card = sdio_get_drvdata(func);
 163                 if (!card || !card->adapter) {
 164                         pr_err("resume: invalid card or adapter\n");
 165                         return 0;
 166                 }
 167         } else {
 168                 pr_err("resume: sdio_func is not specified\n");
 169                 return 0;
 170         }
 171
 172         adapter = card->adapter;
 173
 174         if (!adapter->is_suspended) {
 175                 mwifiex_dbg(adapter, WARN,
 176                             "device already resumed\n");
 177                 return 0;
 178         }
 179
 180         adapter->is_suspended = false;
 181
 182         /* Disable Host Sleep */
 183         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 184                           MWIFIEX_ASYNC_CMD);
 185
 186         return 0;
 187 }
 188
 189 /*
 190  * SDIO remove.
 191  *
 192  * This function removes the interface and frees up the card structure.
 193  */
 194 static void
 195 mwifiex_sdio_remove(struct sdio_func *func)
 196 {
 197         struct sdio_mmc_card *card;
 198         struct mwifiex_adapter *adapter;
 199         struct mwifiex_private *priv;
 200
 201         card = sdio_get_drvdata(func);
 202         if (!card)
 203                 return;
 204
 205         adapter = card->adapter;
 206         if (!adapter || !adapter->priv_num)
 207                 return;
 208
 209         mwifiex_dbg(adapter, INFO, "info: SDIO func num=%d\n", func->num);
 210
 211         if (user_rmmod) {
 212                 if (adapter->is_suspended)
 213                         mwifiex_sdio_resume(adapter->dev);
 214
 215                 mwifiex_deauthenticate_all(adapter);
 216
 217                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 218                 mwifiex_disable_auto_ds(priv);
 219                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
 220         }
 221
 222         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
 223 }
 224
 225 /*
 226  * SDIO suspend.
 227  *
 228  * Kernel needs to suspend all functions separately. Therefore all
 229  * registered functions must have drivers with suspend and resume
 230  * methods. Failing that the kernel simply removes the whole card.
 231  *
 232  * If already not suspended, this function allocates and sends a host
 233  * sleep activate request to the firmware and turns off the traffic.
 234  */
 235 static int mwifiex_sdio_suspend(struct device *dev)
 236 {
 237         struct sdio_func *func = dev_to_sdio_func(dev);
 238         struct sdio_mmc_card *card;
 239         struct mwifiex_adapter *adapter;
 240         mmc_pm_flag_t pm_flag = 0;
 241         int ret = 0;
 242
 243         if (func) {
 244                 pm_flag = sdio_get_host_pm_caps(func);
 245                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
 246                          sdio_func_id(func), pm_flag);
 247                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
 248                         pr_err("%s: cannot remain alive while host is"
 249                                 " suspended\n", sdio_func_id(func));
 250                         return -ENOSYS;
 251                 }
 252
 253                 card = sdio_get_drvdata(func);
 254                 if (!card || !card->adapter) {
 255                         pr_err("suspend: invalid card or adapter\n");
 256                         return 0;
 257                 }
 258         } else {
 259                 pr_err("suspend: sdio_func is not specified\n");
 260                 return 0;
 261         }
 262
 263         adapter = card->adapter;
 264
 265         /* Enable the Host Sleep */
 266         if (!mwifiex_enable_hs(adapter)) {
 267                 mwifiex_dbg(adapter, ERROR,
 268                             "cmd: failed to suspend\n");
 269                 adapter->hs_enabling = false;
 270                 return -EFAULT;
 271         }
 272
 273         mwifiex_dbg(adapter, INFO,
 274                     "cmd: suspend with MMC_PM_KEEP_POWER\n");
 275         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 276
 277         /* Indicate device suspended */
 278         adapter->is_suspended = true;
 279         adapter->hs_enabling = false;
 280
 281         return ret;
 282 }
 283
 284 /* Device ID for SD8786 */
 285 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
 286 /* Device ID for SD8787 */
 287 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
 288 /* Device ID for SD8797 */
 289 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
 290 /* Device ID for SD8897 */
 291 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
 292 /* Device ID for SD8887 */
 293 #define SDIO_DEVICE_ID_MARVELL_8887   (0x9135)
 294 /* Device ID for SD8801 */
 295 #define SDIO_DEVICE_ID_MARVELL_8801   (0x9139)
 296 /* Device ID for SD8997 */
 297 #define SDIO_DEVICE_ID_MARVELL_8997   (0x9141)
 298
 299
 300 /* WLAN IDs */
 301 static const struct sdio_device_id mwifiex_ids[] = {
 302         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
 303                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
 304         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
 305                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
 306         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
 307                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
 308         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
 309                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
 310         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887),
 311                 .driver_data = (unsigned long)&mwifiex_sdio_sd8887},
 312         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8801),
 313                 .driver_data = (unsigned long)&mwifiex_sdio_sd8801},
 314         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8997),
 315                 .driver_data = (unsigned long)&mwifiex_sdio_sd8997},
 316         {},
 317 };
 318
 319 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
 320
 321 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
 322         .suspend = mwifiex_sdio_suspend,
 323         .resume = mwifiex_sdio_resume,
 324 };
 325
 326 static struct sdio_driver mwifiex_sdio = {
 327         .name = "mwifiex_sdio",
 328         .id_table = mwifiex_ids,
 329         .probe = mwifiex_sdio_probe,
 330         .remove = mwifiex_sdio_remove,
 331         .drv = {
 332                 .owner = THIS_MODULE,
 333                 .pm = &mwifiex_sdio_pm_ops,
 334         }
 335 };
 336
 337 /* Write data into SDIO card register. Caller claims SDIO device. */
 338 static int
 339 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
 340 {
 341         int ret = -1;
 342         sdio_writeb(func, data, reg, &ret);
 343         return ret;
 344 }
 345
 346 /*
 347  * This function writes data into SDIO card register.
 348  */
 349 static int
 350 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
 351 {
 352         struct sdio_mmc_card *card = adapter->card;
 353         int ret;
 354
 355         sdio_claim_host(card->func);
 356         ret = mwifiex_write_reg_locked(card->func, reg, data);
 357         sdio_release_host(card->func);
 358
 359         return ret;
 360 }
 361
 362 /*
 363  * This function reads data from SDIO card register.
 364  */
 365 static int
 366 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
 367 {
 368         struct sdio_mmc_card *card = adapter->card;
 369         int ret = -1;
 370         u8 val;
 371
 372         sdio_claim_host(card->func);
 373         val = sdio_readb(card->func, reg, &ret);
 374         sdio_release_host(card->func);
 375
 376         *data = val;
 377
 378         return ret;
 379 }
 380
 381 /*
 382  * This function writes multiple data into SDIO card memory.
 383  *
 384  * This does not work in suspended mode.
 385  */
 386 static int
 387 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
 388                         u8 *buffer, u32 pkt_len, u32 port)
 389 {
 390         struct sdio_mmc_card *card = adapter->card;
 391         int ret;
 392         u8 blk_mode =
 393                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
 394         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 395         u32 blk_cnt =
 396                 (blk_mode ==
 397                  BLOCK_MODE) ? (pkt_len /
 398                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
 399         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 400
 401         if (adapter->is_suspended) {
 402                 mwifiex_dbg(adapter, ERROR,
 403                             "%s: not allowed while suspended\n", __func__);
 404                 return -1;
 405         }
 406
 407         sdio_claim_host(card->func);
 408
 409         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
 410
 411         sdio_release_host(card->func);
 412
 413         return ret;
 414 }
 415
 416 /*
 417  * This function reads multiple data from SDIO card memory.
 418  */
 419 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
 420                                   u32 len, u32 port, u8 claim)
 421 {
 422         struct sdio_mmc_card *card = adapter->card;
 423         int ret;
 424         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
 425                        : BLOCK_MODE;
 426         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 427         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
 428                         : len;
 429         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 430
 431         if (claim)
 432                 sdio_claim_host(card->func);
 433
 434         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
 435
 436         if (claim)
 437                 sdio_release_host(card->func);
 438
 439         return ret;
 440 }
 441
 442 /*
 443  * This function wakes up the card.
 444  *
 445  * A host power up command is written to the card configuration
 446  * register to wake up the card.
 447  */
 448 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
 449 {
 450         mwifiex_dbg(adapter, EVENT,
 451                     "event: wakeup device...\n");
 452
 453         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
 454 }
 455
 456 /*
 457  * This function is called after the card has woken up.
 458  *
 459  * The card configuration register is reset.
 460  */
 461 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
 462 {
 463         mwifiex_dbg(adapter, EVENT,
 464                     "cmd: wakeup device completed\n");
 465
 466         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
 467 }
 468
 469 /*
 470  * This function is used to initialize IO ports for the
 471  * chipsets supporting SDIO new mode eg SD8897.
 472  */
 473 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
 474 {
 475         u8 reg;
 476         struct sdio_mmc_card *card = adapter->card;
 477
 478         adapter->ioport = MEM_PORT;
 479
 480         /* enable sdio new mode */
 481         if (mwifiex_read_reg(adapter, card->reg->card_cfg_2_1_reg, &reg))
 482                 return -1;
 483         if (mwifiex_write_reg(adapter, card->reg->card_cfg_2_1_reg,
 484                               reg | CMD53_NEW_MODE))
 485                 return -1;
 486
 487         /* Configure cmd port and enable reading rx length from the register */
 488         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_0, &reg))
 489                 return -1;
 490         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_0,
 491                               reg | CMD_PORT_RD_LEN_EN))
 492                 return -1;
 493
 494         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
 495          * completed
 496          */
 497         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_1, &reg))
 498                 return -1;
 499         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_1,
 500                               reg | CMD_PORT_AUTO_EN))
 501                 return -1;
 502
 503         return 0;
 504 }
 505
 506 /* This function initializes the IO ports.
 507  *
 508  * The following operations are performed -
 509  *      - Read the IO ports (0, 1 and 2)
 510  *      - Set host interrupt Reset-To-Read to clear
 511  *      - Set auto re-enable interrupt
 512  */
 513 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
 514 {
 515         u8 reg;
 516         struct sdio_mmc_card *card = adapter->card;
 517
 518         adapter->ioport = 0;
 519
 520         if (card->supports_sdio_new_mode) {
 521                 if (mwifiex_init_sdio_new_mode(adapter))
 522                         return -1;
 523                 goto cont;
 524         }
 525
 526         /* Read the IO port */
 527         if (!mwifiex_read_reg(adapter, card->reg->io_port_0_reg, &reg))
 528                 adapter->ioport |= (reg & 0xff);
 529         else
 530                 return -1;
 531
 532         if (!mwifiex_read_reg(adapter, card->reg->io_port_1_reg, &reg))
 533                 adapter->ioport |= ((reg & 0xff) << 8);
 534         else
 535                 return -1;
 536
 537         if (!mwifiex_read_reg(adapter, card->reg->io_port_2_reg, &reg))
 538                 adapter->ioport |= ((reg & 0xff) << 16);
 539         else
 540                 return -1;
 541 cont:
 542         mwifiex_dbg(adapter, INFO,
 543                     "info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
 544
 545         /* Set Host interrupt reset to read to clear */
 546         if (!mwifiex_read_reg(adapter, card->reg->host_int_rsr_reg, &reg))
 547                 mwifiex_write_reg(adapter, card->reg->host_int_rsr_reg,
 548                                   reg | card->reg->sdio_int_mask);
 549         else
 550                 return -1;
 551
 552         /* Dnld/Upld ready set to auto reset */
 553         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
 554                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
 555                                   reg | AUTO_RE_ENABLE_INT);
 556         else
 557                 return -1;
 558
 559         return 0;
 560 }
 561
 562 /*
 563  * This function sends data to the card.
 564  */
 565 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
 566                                       u8 *payload, u32 pkt_len, u32 port)
 567 {
 568         u32 i = 0;
 569         int ret;
 570
 571         do {
 572                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
 573                 if (ret) {
 574                         i++;
 575                         mwifiex_dbg(adapter, ERROR,
 576                                     "host_to_card, write iomem\t"
 577                                     "(%d) failed: %d\n", i, ret);
 578                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
 579                                 mwifiex_dbg(adapter, ERROR,
 580                                             "write CFG reg failed\n");
 581
 582                         ret = -1;
 583                         if (i > MAX_WRITE_IOMEM_RETRY)
 584                                 return ret;
 585                 }
 586         } while (ret == -1);
 587
 588         return ret;
 589 }
 590
 591 /*
 592  * This function gets the read port.
 593  *
 594  * If control port bit is set in MP read bitmap, the control port
 595  * is returned, otherwise the current read port is returned and
 596  * the value is increased (provided it does not reach the maximum
 597  * limit, in which case it is reset to 1)
 598  */
 599 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
 600 {
 601         struct sdio_mmc_card *card = adapter->card;
 602         const struct mwifiex_sdio_card_reg *reg = card->reg;
 603         u32 rd_bitmap = card->mp_rd_bitmap;
 604
 605         mwifiex_dbg(adapter, DATA,
 606                     "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
 607
 608         if (card->supports_sdio_new_mode) {
 609                 if (!(rd_bitmap & reg->data_port_mask))
 610                         return -1;
 611         } else {
 612                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
 613                         return -1;
 614         }
 615
 616         if ((card->has_control_mask) &&
 617             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
 618                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
 619                 *port = CTRL_PORT;
 620                 mwifiex_dbg(adapter, DATA,
 621                             "data: port=%d mp_rd_bitmap=0x%08x\n",
 622                             *port, card->mp_rd_bitmap);
 623                 return 0;
 624         }
 625
 626         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
 627                 return -1;
 628
 629         /* We are now handling the SDIO data ports */
 630         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
 631         *port = card->curr_rd_port;
 632
 633         if (++card->curr_rd_port == card->max_ports)
 634                 card->curr_rd_port = reg->start_rd_port;
 635
 636         mwifiex_dbg(adapter, DATA,
 637                     "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
 638                     *port, rd_bitmap, card->mp_rd_bitmap);
 639
 640         return 0;
 641 }
 642
 643 /*
 644  * This function gets the write port for data.
 645  *
 646  * The current write port is returned if available and the value is
 647  * increased (provided it does not reach the maximum limit, in which
 648  * case it is reset to 1)
 649  */
 650 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
 651 {
 652         struct sdio_mmc_card *card = adapter->card;
 653         const struct mwifiex_sdio_card_reg *reg = card->reg;
 654         u32 wr_bitmap = card->mp_wr_bitmap;
 655
 656         mwifiex_dbg(adapter, DATA,
 657                     "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
 658
 659         if (!(wr_bitmap & card->mp_data_port_mask)) {
 660                 adapter->data_sent = true;
 661                 return -EBUSY;
 662         }
 663
 664         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
 665                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
 666                 *port = card->curr_wr_port;
 667                 if (++card->curr_wr_port == card->mp_end_port)
 668                         card->curr_wr_port = reg->start_wr_port;
 669         } else {
 670                 adapter->data_sent = true;
 671                 return -EBUSY;
 672         }
 673
 674         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
 675                 mwifiex_dbg(adapter, ERROR,
 676                             "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 677                             *port, card->curr_wr_port, wr_bitmap,
 678                             card->mp_wr_bitmap);
 679                 return -1;
 680         }
 681
 682         mwifiex_dbg(adapter, DATA,
 683                     "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 684                     *port, wr_bitmap, card->mp_wr_bitmap);
 685
 686         return 0;
 687 }
 688
 689 /*
 690  * This function polls the card status.
 691  */
 692 static int
 693 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
 694 {
 695         struct sdio_mmc_card *card = adapter->card;
 696         u32 tries;
 697         u8 cs;
 698
 699         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 700                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
 701                         break;
 702                 else if ((cs & bits) == bits)
 703                         return 0;
 704
 705                 usleep_range(10, 20);
 706         }
 707
 708         mwifiex_dbg(adapter, ERROR,
 709                     "poll card status failed, tries = %d\n", tries);
 710
 711         return -1;
 712 }
 713
 714 /*
 715  * This function reads the firmware status.
 716  */
 717 static int
 718 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
 719 {
 720         struct sdio_mmc_card *card = adapter->card;
 721         const struct mwifiex_sdio_card_reg *reg = card->reg;
 722         u8 fws0, fws1;
 723
 724         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
 725                 return -1;
 726
 727         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
 728                 return -1;
 729
 730         *dat = (u16) ((fws1 << 8) | fws0);
 731
 732         return 0;
 733 }
 734
 735 /*
 736  * This function disables the host interrupt.
 737  *
 738  * The host interrupt mask is read, the disable bit is reset and
 739  * written back to the card host interrupt mask register.
 740  */
 741 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
 742 {
 743         struct sdio_mmc_card *card = adapter->card;
 744         struct sdio_func *func = card->func;
 745
 746         sdio_claim_host(func);
 747         mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg, 0);
 748         sdio_release_irq(func);
 749         sdio_release_host(func);
 750 }
 751
 752 /*
 753  * This function reads the interrupt status from card.
 754  */
 755 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
 756 {
 757         struct sdio_mmc_card *card = adapter->card;
 758         u8 sdio_ireg;
 759         unsigned long flags;
 760
 761         if (mwifiex_read_data_sync(adapter, card->mp_regs,
 762                                    card->reg->max_mp_regs,
 763                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
 764                 mwifiex_dbg(adapter, ERROR, "read mp_regs failed\n");
 765                 return;
 766         }
 767
 768         sdio_ireg = card->mp_regs[card->reg->host_int_status_reg];
 769         if (sdio_ireg) {
 770                 /*
 771                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 772                  * For SDIO new mode CMD port interrupts
 773                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
 774                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
 775                  * Clear the interrupt status register
 776                  */
 777                 mwifiex_dbg(adapter, INTR,
 778                             "int: sdio_ireg = %#x\n", sdio_ireg);
 779                 spin_lock_irqsave(&adapter->int_lock, flags);
 780                 adapter->int_status |= sdio_ireg;
 781                 spin_unlock_irqrestore(&adapter->int_lock, flags);
 782         }
 783 }
 784
 785 /*
 786  * SDIO interrupt handler.
 787  *
 788  * This function reads the interrupt status from firmware and handles
 789  * the interrupt in current thread (ksdioirqd) right away.
 790  */
 791 static void
 792 mwifiex_sdio_interrupt(struct sdio_func *func)
 793 {
 794         struct mwifiex_adapter *adapter;
 795         struct sdio_mmc_card *card;
 796
 797         card = sdio_get_drvdata(func);
 798         if (!card || !card->adapter) {
 799                 pr_debug("int: func=%p card=%p adapter=%p\n",
 800                          func, card, card ? card->adapter : NULL);
 801                 return;
 802         }
 803         adapter = card->adapter;
 804
 805         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
 806                 adapter->ps_state = PS_STATE_AWAKE;
 807
 808         mwifiex_interrupt_status(adapter);
 809         mwifiex_main_process(adapter);
 810 }
 811
 812 /*
 813  * This function enables the host interrupt.
 814  *
 815  * The host interrupt enable mask is written to the card
 816  * host interrupt mask register.
 817  */
 818 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
 819 {
 820         struct sdio_mmc_card *card = adapter->card;
 821         struct sdio_func *func = card->func;
 822         int ret;
 823
 824         sdio_claim_host(func);
 825
 826         /* Request the SDIO IRQ */
 827         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
 828         if (ret) {
 829                 mwifiex_dbg(adapter, ERROR,
 830                             "claim irq failed: ret=%d\n", ret);
 831                 goto out;
 832         }
 833
 834         /* Simply write the mask to the register */
 835         ret = mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg,
 836                                        card->reg->host_int_enable);
 837         if (ret) {
 838                 mwifiex_dbg(adapter, ERROR,
 839                             "enable host interrupt failed\n");
 840                 sdio_release_irq(func);
 841         }
 842
 843 out:
 844         sdio_release_host(func);
 845         return ret;
 846 }
 847
 848 /*
 849  * This function sends a data buffer to the card.
 850  */
 851 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
 852                                      u32 *type, u8 *buffer,
 853                                      u32 npayload, u32 ioport)
 854 {
 855         int ret;
 856         u32 nb;
 857
 858         if (!buffer) {
 859                 mwifiex_dbg(adapter, ERROR,
 860                             "%s: buffer is NULL\n", __func__);
 861                 return -1;
 862         }
 863
 864         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
 865
 866         if (ret) {
 867                 mwifiex_dbg(adapter, ERROR,
 868                             "%s: read iomem failed: %d\n", __func__,
 869                         ret);
 870                 return -1;
 871         }
 872
 873         nb = le16_to_cpu(*(__le16 *) (buffer));
 874         if (nb > npayload) {
 875                 mwifiex_dbg(adapter, ERROR,
 876                             "%s: invalid packet, nb=%d npayload=%d\n",
 877                             __func__, nb, npayload);
 878                 return -1;
 879         }
 880
 881         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
 882
 883         return ret;
 884 }
 885
 886 /*
 887  * This function downloads the firmware to the card.
 888  *
 889  * Firmware is downloaded to the card in blocks. Every block download
 890  * is tested for CRC errors, and retried a number of times before
 891  * returning failure.
 892  */
 893 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 894                                     struct mwifiex_fw_image *fw)
 895 {
 896         struct sdio_mmc_card *card = adapter->card;
 897         const struct mwifiex_sdio_card_reg *reg = card->reg;
 898         int ret;
 899         u8 *firmware = fw->fw_buf;
 900         u32 firmware_len = fw->fw_len;
 901         u32 offset = 0;
 902         u8 base0, base1;
 903         u8 *fwbuf;
 904         u16 len = 0;
 905         u32 txlen, tx_blocks = 0, tries;
 906         u32 i = 0;
 907
 908         if (!firmware_len) {
 909                 mwifiex_dbg(adapter, ERROR,
 910                             "firmware image not found! Terminating download\n");
 911                 return -1;
 912         }
 913
 914         mwifiex_dbg(adapter, INFO,
 915                     "info: downloading FW image (%d bytes)\n",
 916                     firmware_len);
 917
 918         /* Assume that the allocated buffer is 8-byte aligned */
 919         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
 920         if (!fwbuf)
 921                 return -ENOMEM;
 922
 923         sdio_claim_host(card->func);
 924
 925         /* Perform firmware data transfer */
 926         do {
 927                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
 928                    bits */
 929                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
 930                                                     DN_LD_CARD_RDY);
 931                 if (ret) {
 932                         mwifiex_dbg(adapter, ERROR,
 933                                     "FW download with helper:\t"
 934                                     "poll status timeout @ %d\n", offset);
 935                         goto done;
 936                 }
 937
 938                 /* More data? */
 939                 if (offset >= firmware_len)
 940                         break;
 941
 942                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 943                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
 944                                                &base0);
 945                         if (ret) {
 946                                 mwifiex_dbg(adapter, ERROR,
 947                                             "dev BASE0 register read failed:\t"
 948                                             "base0=%#04X(%d). Terminating dnld\n",
 949                                             base0, base0);
 950                                 goto done;
 951                         }
 952                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
 953                                                &base1);
 954                         if (ret) {
 955                                 mwifiex_dbg(adapter, ERROR,
 956                                             "dev BASE1 register read failed:\t"
 957                                             "base1=%#04X(%d). Terminating dnld\n",
 958                                             base1, base1);
 959                                 goto done;
 960                         }
 961                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
 962
 963                         if (len)
 964                                 break;
 965
 966                         usleep_range(10, 20);
 967                 }
 968
 969                 if (!len) {
 970                         break;
 971                 } else if (len > MWIFIEX_UPLD_SIZE) {
 972                         mwifiex_dbg(adapter, ERROR,
 973                                     "FW dnld failed @ %d, invalid length %d\n",
 974                                     offset, len);
 975                         ret = -1;
 976                         goto done;
 977                 }
 978
 979                 txlen = len;
 980
 981                 if (len & BIT(0)) {
 982                         i++;
 983                         if (i > MAX_WRITE_IOMEM_RETRY) {
 984                                 mwifiex_dbg(adapter, ERROR,
 985                                             "FW dnld failed @ %d, over max retry\n",
 986                                             offset);
 987                                 ret = -1;
 988                                 goto done;
 989                         }
 990                         mwifiex_dbg(adapter, ERROR,
 991                                     "CRC indicated by the helper:\t"
 992                                     "len = 0x%04X, txlen = %d\n", len, txlen);
 993                         len &= ~BIT(0);
 994                         /* Setting this to 0 to resend from same offset */
 995                         txlen = 0;
 996                 } else {
 997                         i = 0;
 998
 999                         /* Set blocksize to transfer - checking for last
1000                            block */
1001                         if (firmware_len - offset < txlen)
1002                                 txlen = firmware_len - offset;
1003
1004                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
1005                                     / MWIFIEX_SDIO_BLOCK_SIZE;
1006
1007                         /* Copy payload to buffer */
1008                         memmove(fwbuf, &firmware[offset], txlen);
1009                 }
1010
1011                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
1012                                               MWIFIEX_SDIO_BLOCK_SIZE,
1013                                               adapter->ioport);
1014                 if (ret) {
1015                         mwifiex_dbg(adapter, ERROR,
1016                                     "FW download, write iomem (%d) failed @ %d\n",
1017                                     i, offset);
1018                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
1019                                 mwifiex_dbg(adapter, ERROR,
1020                                             "write CFG reg failed\n");
1021
1022                         ret = -1;
1023                         goto done;
1024                 }
1025
1026                 offset += txlen;
1027         } while (true);
1028
1029         sdio_release_host(card->func);
1030
1031         mwifiex_dbg(adapter, MSG,
1032                     "info: FW download over, size %d bytes\n", offset);
1033
1034         ret = 0;
1035 done:
1036         kfree(fwbuf);
1037         return ret;
1038 }
1039
1040 /*
1041  * This function checks the firmware status in card.
1042  *
1043  * The winner interface is also determined by this function.
1044  */
1045 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1046                                    u32 poll_num)
1047 {
1048         struct sdio_mmc_card *card = adapter->card;
1049         int ret = 0;
1050         u16 firmware_stat;
1051         u32 tries;
1052         u8 winner_status;
1053
1054         /* Wait for firmware initialization event */
1055         for (tries = 0; tries < poll_num; tries++) {
1056                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1057                 if (ret)
1058                         continue;
1059                 if (firmware_stat == FIRMWARE_READY_SDIO) {
1060                         ret = 0;
1061                         break;
1062                 } else {
1063                         msleep(100);
1064                         ret = -1;
1065                 }
1066         }
1067
1068         if (ret) {
1069                 if (mwifiex_read_reg
1070                     (adapter, card->reg->status_reg_0, &winner_status))
1071                         winner_status = 0;
1072
1073                 if (winner_status)
1074                         adapter->winner = 0;
1075                 else
1076                         adapter->winner = 1;
1077         }
1078         return ret;
1079 }
1080
1081 /*
1082  * This function decode sdio aggreation pkt.
1083  *
1084  * Based on the the data block size and pkt_len,
1085  * skb data will be decoded to few packets.
1086  */
1087 static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
1088                                     struct sk_buff *skb)
1089 {
1090         u32 total_pkt_len, pkt_len;
1091         struct sk_buff *skb_deaggr;
1092         u32 pkt_type;
1093         u16 blk_size;
1094         u8 blk_num;
1095         u8 *data;
1096
1097         data = skb->data;
1098         total_pkt_len = skb->len;
1099
1100         while (total_pkt_len >= (SDIO_HEADER_OFFSET + INTF_HEADER_LEN)) {
1101                 if (total_pkt_len < adapter->sdio_rx_block_size)
1102                         break;
1103                 blk_num = *(data + BLOCK_NUMBER_OFFSET);
1104                 blk_size = adapter->sdio_rx_block_size * blk_num;
1105                 if (blk_size > total_pkt_len) {
1106                         mwifiex_dbg(adapter, ERROR,
1107                                     "%s: error in blk_size,\t"
1108                                     "blk_num=%d, blk_size=%d, total_pkt_len=%d\n",
1109                                     __func__, blk_num, blk_size, total_pkt_len);
1110                         break;
1111                 }
1112                 pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
1113                 pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
1114                                          2));
1115                 if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
1116                         mwifiex_dbg(adapter, ERROR,
1117                                     "%s: error in pkt_len,\t"
1118                                     "pkt_len=%d, blk_size=%d\n",
1119                                     __func__, pkt_len, blk_size);
1120                         break;
1121                 }
1122                 skb_deaggr = mwifiex_alloc_dma_align_buf(pkt_len,
1123                                                          GFP_KERNEL | GFP_DMA);
1124                 if (!skb_deaggr)
1125                         break;
1126                 skb_put(skb_deaggr, pkt_len);
1127                 memcpy(skb_deaggr->data, data + SDIO_HEADER_OFFSET, pkt_len);
1128                 skb_pull(skb_deaggr, INTF_HEADER_LEN);
1129
1130                 mwifiex_handle_rx_packet(adapter, skb_deaggr);
1131                 data += blk_size;
1132                 total_pkt_len -= blk_size;
1133         }
1134 }
1135
1136 /*
1137  * This function decodes a received packet.
1138  *
1139  * Based on the type, the packet is treated as either a data, or
1140  * a command response, or an event, and the correct handler
1141  * function is invoked.
1142  */
1143 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1144                                     struct sk_buff *skb, u32 upld_typ)
1145 {
1146         u8 *cmd_buf;
1147         __le16 *curr_ptr = (__le16 *)skb->data;
1148         u16 pkt_len = le16_to_cpu(*curr_ptr);
1149         struct mwifiex_rxinfo *rx_info;
1150
1151         if (upld_typ != MWIFIEX_TYPE_AGGR_DATA) {
1152                 skb_trim(skb, pkt_len);
1153                 skb_pull(skb, INTF_HEADER_LEN);
1154         }
1155
1156         switch (upld_typ) {
1157         case MWIFIEX_TYPE_AGGR_DATA:
1158                 mwifiex_dbg(adapter, INFO,
1159                             "info: --- Rx: Aggr Data packet ---\n");
1160                 rx_info = MWIFIEX_SKB_RXCB(skb);
1161                 rx_info->buf_type = MWIFIEX_TYPE_AGGR_DATA;
1162                 if (adapter->rx_work_enabled) {
1163                         skb_queue_tail(&adapter->rx_data_q, skb);
1164                         atomic_inc(&adapter->rx_pending);
1165                         adapter->data_received = true;
1166                 } else {
1167                         mwifiex_deaggr_sdio_pkt(adapter, skb);
1168                         dev_kfree_skb_any(skb);
1169                 }
1170                 break;
1171
1172         case MWIFIEX_TYPE_DATA:
1173                 mwifiex_dbg(adapter, DATA,
1174                             "info: --- Rx: Data packet ---\n");
1175                 if (adapter->rx_work_enabled) {
1176                         skb_queue_tail(&adapter->rx_data_q, skb);
1177                         adapter->data_received = true;
1178                         atomic_inc(&adapter->rx_pending);
1179                 } else {
1180                         mwifiex_handle_rx_packet(adapter, skb);
1181                 }
1182                 break;
1183
1184         case MWIFIEX_TYPE_CMD:
1185                 mwifiex_dbg(adapter, CMD,
1186                             "info: --- Rx: Cmd Response ---\n");
1187                 /* take care of curr_cmd = NULL case */
1188                 if (!adapter->curr_cmd) {
1189                         cmd_buf = adapter->upld_buf;
1190
1191                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1192                                 mwifiex_process_sleep_confirm_resp(adapter,
1193                                                                    skb->data,
1194                                                                    skb->len);
1195
1196                         memcpy(cmd_buf, skb->data,
1197                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1198                                      skb->len));
1199
1200                         dev_kfree_skb_any(skb);
1201                 } else {
1202                         adapter->cmd_resp_received = true;
1203                         adapter->curr_cmd->resp_skb = skb;
1204                 }
1205                 break;
1206
1207         case MWIFIEX_TYPE_EVENT:
1208                 mwifiex_dbg(adapter, EVENT,
1209                             "info: --- Rx: Event ---\n");
1210                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1211
1212                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1213                         memcpy(adapter->event_body,
1214                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1215                                skb->len);
1216
1217                 /* event cause has been saved to adapter->event_cause */
1218                 adapter->event_received = true;
1219                 adapter->event_skb = skb;
1220
1221                 break;
1222
1223         default:
1224                 mwifiex_dbg(adapter, ERROR,
1225                             "unknown upload type %#x\n", upld_typ);
1226                 dev_kfree_skb_any(skb);
1227                 break;
1228         }
1229
1230         return 0;
1231 }
1232
1233 /*
1234  * This function transfers received packets from card to driver, performing
1235  * aggregation if required.
1236  *
1237  * For data received on control port, or if aggregation is disabled, the
1238  * received buffers are uploaded as separate packets. However, if aggregation
1239  * is enabled and required, the buffers are copied onto an aggregation buffer,
1240  * provided there is space left, processed and finally uploaded.
1241  */
1242 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1243                                              u16 rx_len, u8 port)
1244 {
1245         struct sdio_mmc_card *card = adapter->card;
1246         s32 f_do_rx_aggr = 0;
1247         s32 f_do_rx_cur = 0;
1248         s32 f_aggr_cur = 0;
1249         s32 f_post_aggr_cur = 0;
1250         struct sk_buff *skb_deaggr;
1251         struct sk_buff *skb = NULL;
1252         u32 pkt_len, pkt_type, mport, pind;
1253         u8 *curr_ptr;
1254
1255         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1256                 /* Read the command Resp without aggr */
1257                 mwifiex_dbg(adapter, CMD,
1258                             "info: %s: no aggregation for cmd\t"
1259                             "response\n", __func__);
1260
1261                 f_do_rx_cur = 1;
1262                 goto rx_curr_single;
1263         }
1264
1265         if (!card->mpa_rx.enabled) {
1266                 mwifiex_dbg(adapter, WARN,
1267                             "info: %s: rx aggregation disabled\n",
1268                             __func__);
1269
1270                 f_do_rx_cur = 1;
1271                 goto rx_curr_single;
1272         }
1273
1274         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1275                                          card->reg->data_port_mask)) ||
1276             (card->has_control_mask && (card->mp_rd_bitmap &
1277                                         (~((u32) CTRL_PORT_MASK))))) {
1278                 /* Some more data RX pending */
1279                 mwifiex_dbg(adapter, INFO,
1280                             "info: %s: not last packet\n", __func__);
1281
1282                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1283                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len)) {
1284                                 f_aggr_cur = 1;
1285                         } else {
1286                                 /* No room in Aggr buf, do rx aggr now */
1287                                 f_do_rx_aggr = 1;
1288                                 f_post_aggr_cur = 1;
1289                         }
1290                 } else {
1291                         /* Rx aggr not in progress */
1292                         f_aggr_cur = 1;
1293                 }
1294
1295         } else {
1296                 /* No more data RX pending */
1297                 mwifiex_dbg(adapter, INFO,
1298                             "info: %s: last packet\n", __func__);
1299
1300                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1301                         f_do_rx_aggr = 1;
1302                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len))
1303                                 f_aggr_cur = 1;
1304                         else
1305                                 /* No room in Aggr buf, do rx aggr now */
1306                                 f_do_rx_cur = 1;
1307                 } else {
1308                         f_do_rx_cur = 1;
1309                 }
1310         }
1311
1312         if (f_aggr_cur) {
1313                 mwifiex_dbg(adapter, INFO,
1314                             "info: current packet aggregation\n");
1315                 /* Curr pkt can be aggregated */
1316                 mp_rx_aggr_setup(card, rx_len, port);
1317
1318                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1319                     mp_rx_aggr_port_limit_reached(card)) {
1320                         mwifiex_dbg(adapter, INFO,
1321                                     "info: %s: aggregated packet\t"
1322                                     "limit reached\n", __func__);
1323                         /* No more pkts allowed in Aggr buf, rx it */
1324                         f_do_rx_aggr = 1;
1325                 }
1326         }
1327
1328         if (f_do_rx_aggr) {
1329                 /* do aggr RX now */
1330                 mwifiex_dbg(adapter, DATA,
1331                             "info: do_rx_aggr: num of packets: %d\n",
1332                             card->mpa_rx.pkt_cnt);
1333
1334                 if (card->supports_sdio_new_mode) {
1335                         int i;
1336                         u32 port_count;
1337
1338                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1339                                 if (card->mpa_rx.ports & BIT(i))
1340                                         port_count++;
1341
1342                         /* Reading data from "start_port + 0" to "start_port +
1343                          * port_count -1", so decrease the count by 1
1344                          */
1345                         port_count--;
1346                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1347                                  (port_count << 8)) + card->mpa_rx.start_port;
1348                 } else {
1349                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1350                                  (card->mpa_rx.ports << 4)) +
1351                                  card->mpa_rx.start_port;
1352                 }
1353
1354                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1355                                            card->mpa_rx.buf_len, mport, 1))
1356                         goto error;
1357
1358                 curr_ptr = card->mpa_rx.buf;
1359
1360                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1361                         u32 *len_arr = card->mpa_rx.len_arr;
1362
1363                         /* get curr PKT len & type */
1364                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1365                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1366
1367                         /* copy pkt to deaggr buf */
1368                         skb_deaggr = mwifiex_alloc_dma_align_buf(len_arr[pind],
1369                                                                  GFP_KERNEL |
1370                                                                  GFP_DMA);
1371                         if (!skb_deaggr) {
1372                                 mwifiex_dbg(adapter, ERROR, "skb allocation failure\t"
1373                                             "drop pkt len=%d type=%d\n",
1374                                             pkt_len, pkt_type);
1375                                 curr_ptr += len_arr[pind];
1376                                 continue;
1377                         }
1378
1379                         skb_put(skb_deaggr, len_arr[pind]);
1380
1381                         if ((pkt_type == MWIFIEX_TYPE_DATA ||
1382                              (pkt_type == MWIFIEX_TYPE_AGGR_DATA &&
1383                               adapter->sdio_rx_aggr_enable)) &&
1384                             (pkt_len <= len_arr[pind])) {
1385
1386                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1387
1388                                 skb_trim(skb_deaggr, pkt_len);
1389
1390                                 /* Process de-aggr packet */
1391                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1392                                                          pkt_type);
1393                         } else {
1394                                 mwifiex_dbg(adapter, ERROR,
1395                                             "drop wrong aggr pkt:\t"
1396                                             "sdio_single_port_rx_aggr=%d\t"
1397                                             "type=%d len=%d max_len=%d\n",
1398                                             adapter->sdio_rx_aggr_enable,
1399                                             pkt_type, pkt_len, len_arr[pind]);
1400                                 dev_kfree_skb_any(skb_deaggr);
1401                         }
1402                         curr_ptr += len_arr[pind];
1403                 }
1404                 MP_RX_AGGR_BUF_RESET(card);
1405         }
1406
1407 rx_curr_single:
1408         if (f_do_rx_cur) {
1409                 mwifiex_dbg(adapter, INFO, "info: RX: port: %d, rx_len: %d\n",
1410                             port, rx_len);
1411
1412                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1413                 if (!skb) {
1414                         mwifiex_dbg(adapter, ERROR,
1415                                     "single skb allocated fail,\t"
1416                                     "drop pkt port=%d len=%d\n", port, rx_len);
1417                         if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1418                                                       card->mpa_rx.buf, rx_len,
1419                                                       adapter->ioport + port))
1420                                 goto error;
1421                         return 0;
1422                 }
1423
1424                 skb_put(skb, rx_len);
1425
1426                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1427                                               skb->data, skb->len,
1428                                               adapter->ioport + port))
1429                         goto error;
1430                 if (!adapter->sdio_rx_aggr_enable &&
1431                     pkt_type == MWIFIEX_TYPE_AGGR_DATA) {
1432                         mwifiex_dbg(adapter, ERROR, "drop wrong pkt type %d\t"
1433                                     "current SDIO RX Aggr not enabled\n",
1434                                     pkt_type);
1435                         dev_kfree_skb_any(skb);
1436                         return 0;
1437                 }
1438
1439                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1440         }
1441         if (f_post_aggr_cur) {
1442                 mwifiex_dbg(adapter, INFO,
1443                             "info: current packet aggregation\n");
1444                 /* Curr pkt can be aggregated */
1445                 mp_rx_aggr_setup(card, rx_len, port);
1446         }
1447
1448         return 0;
1449 error:
1450         if (MP_RX_AGGR_IN_PROGRESS(card))
1451                 MP_RX_AGGR_BUF_RESET(card);
1452
1453         if (f_do_rx_cur && skb)
1454                 /* Single transfer pending. Free curr buff also */
1455                 dev_kfree_skb_any(skb);
1456
1457         return -1;
1458 }
1459
1460 /*
1461  * This function checks the current interrupt status.
1462  *
1463  * The following interrupts are checked and handled by this function -
1464  *      - Data sent
1465  *      - Command sent
1466  *      - Packets received
1467  *
1468  * Since the firmware does not generate download ready interrupt if the
1469  * port updated is command port only, command sent interrupt checking
1470  * should be done manually, and for every SDIO interrupt.
1471  *
1472  * In case of Rx packets received, the packets are uploaded from card to
1473  * host and processed accordingly.
1474  */
1475 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1476 {
1477         struct sdio_mmc_card *card = adapter->card;
1478         const struct mwifiex_sdio_card_reg *reg = card->reg;
1479         int ret = 0;
1480         u8 sdio_ireg;
1481         struct sk_buff *skb;
1482         u8 port = CTRL_PORT;
1483         u32 len_reg_l, len_reg_u;
1484         u32 rx_blocks;
1485         u16 rx_len;
1486         unsigned long flags;
1487         u32 bitmap;
1488         u8 cr;
1489
1490         spin_lock_irqsave(&adapter->int_lock, flags);
1491         sdio_ireg = adapter->int_status;
1492         adapter->int_status = 0;
1493         spin_unlock_irqrestore(&adapter->int_lock, flags);
1494
1495         if (!sdio_ireg)
1496                 return ret;
1497
1498         /* Following interrupt is only for SDIO new mode */
1499         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1500                 adapter->cmd_sent = false;
1501
1502         /* Following interrupt is only for SDIO new mode */
1503         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1504                 u32 pkt_type;
1505
1506                 /* read the len of control packet */
1507                 rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
1508                 rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
1509                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1510                 if (rx_len <= INTF_HEADER_LEN ||
1511                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1512                      MWIFIEX_RX_DATA_BUF_SIZE)
1513                         return -1;
1514                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1515                 mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n", rx_len);
1516
1517                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1518                 if (!skb)
1519                         return -1;
1520
1521                 skb_put(skb, rx_len);
1522
1523                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1524                                               skb->len, adapter->ioport |
1525                                                         CMD_PORT_SLCT)) {
1526                         mwifiex_dbg(adapter, ERROR,
1527                                     "%s: failed to card_to_host", __func__);
1528                         dev_kfree_skb_any(skb);
1529                         goto term_cmd;
1530                 }
1531
1532                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1533                     (pkt_type != MWIFIEX_TYPE_EVENT))
1534                         mwifiex_dbg(adapter, ERROR,
1535                                     "%s:Received wrong packet on cmd port",
1536                                     __func__);
1537
1538                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1539         }
1540
1541         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1542                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1543                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1544                 if (card->supports_sdio_new_mode) {
1545                         bitmap |=
1546                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1547                         bitmap |=
1548                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1549                 }
1550                 card->mp_wr_bitmap = bitmap;
1551
1552                 mwifiex_dbg(adapter, INTR,
1553                             "int: DNLD: wr_bitmap=0x%x\n",
1554                             card->mp_wr_bitmap);
1555                 if (adapter->data_sent &&
1556                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1557                         mwifiex_dbg(adapter, INTR,
1558                                     "info:  <--- Tx DONE Interrupt --->\n");
1559                         adapter->data_sent = false;
1560                 }
1561         }
1562
1563         /* As firmware will not generate download ready interrupt if the port
1564            updated is command port only, cmd_sent should be done for any SDIO
1565            interrupt. */
1566         if (card->has_control_mask && adapter->cmd_sent) {
1567                 /* Check if firmware has attach buffer at command port and
1568                    update just that in wr_bit_map. */
1569                 card->mp_wr_bitmap |=
1570                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1571                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1572                         adapter->cmd_sent = false;
1573         }
1574
1575         mwifiex_dbg(adapter, INTR, "info: cmd_sent=%d data_sent=%d\n",
1576                     adapter->cmd_sent, adapter->data_sent);
1577         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1578                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1579                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1580                 if (card->supports_sdio_new_mode) {
1581                         bitmap |=
1582                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1583                         bitmap |=
1584                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1585                 }
1586                 card->mp_rd_bitmap = bitmap;
1587                 mwifiex_dbg(adapter, INTR,
1588                             "int: UPLD: rd_bitmap=0x%x\n",
1589                             card->mp_rd_bitmap);
1590
1591                 while (true) {
1592                         ret = mwifiex_get_rd_port(adapter, &port);
1593                         if (ret) {
1594                                 mwifiex_dbg(adapter, INFO,
1595                                             "info: no more rd_port available\n");
1596                                 break;
1597                         }
1598                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1599                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1600                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1601                         rx_len |= (u16) card->mp_regs[len_reg_l];
1602                         mwifiex_dbg(adapter, INFO,
1603                                     "info: RX: port=%d rx_len=%u\n",
1604                                     port, rx_len);
1605                         rx_blocks =
1606                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1607                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1608                         if (rx_len <= INTF_HEADER_LEN ||
1609                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1610                              card->mpa_rx.buf_size) {
1611                                 mwifiex_dbg(adapter, ERROR,
1612                                             "invalid rx_len=%d\n",
1613                                             rx_len);
1614                                 return -1;
1615                         }
1616
1617                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1618                         mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n",
1619                                     rx_len);
1620
1621                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, rx_len,
1622                                                               port)) {
1623                                 mwifiex_dbg(adapter, ERROR,
1624                                             "card_to_host_mpa failed: int status=%#x\n",
1625                                             sdio_ireg);
1626                                 goto term_cmd;
1627                         }
1628                 }
1629         }
1630
1631         return 0;
1632
1633 term_cmd:
1634         /* terminate cmd */
1635         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1636                 mwifiex_dbg(adapter, ERROR, "read CFG reg failed\n");
1637         else
1638                 mwifiex_dbg(adapter, INFO,
1639                             "info: CFG reg val = %d\n", cr);
1640
1641         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1642                 mwifiex_dbg(adapter, ERROR,
1643                             "write CFG reg failed\n");
1644         else
1645                 mwifiex_dbg(adapter, INFO, "info: write success\n");
1646
1647         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1648                 mwifiex_dbg(adapter, ERROR,
1649                             "read CFG reg failed\n");
1650         else
1651                 mwifiex_dbg(adapter, INFO,
1652                             "info: CFG reg val =%x\n", cr);
1653
1654         return -1;
1655 }
1656
1657 /*
1658  * This function aggregates transmission buffers in driver and downloads
1659  * the aggregated packet to card.
1660  *
1661  * The individual packets are aggregated by copying into an aggregation
1662  * buffer and then downloaded to the card. Previous unsent packets in the
1663  * aggregation buffer are pre-copied first before new packets are added.
1664  * Aggregation is done till there is space left in the aggregation buffer,
1665  * or till new packets are available.
1666  *
1667  * The function will only download the packet to the card when aggregation
1668  * stops, otherwise it will just aggregate the packet in aggregation buffer
1669  * and return.
1670  */
1671 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1672                                         u8 *payload, u32 pkt_len, u32 port,
1673                                         u32 next_pkt_len)
1674 {
1675         struct sdio_mmc_card *card = adapter->card;
1676         int ret = 0;
1677         s32 f_send_aggr_buf = 0;
1678         s32 f_send_cur_buf = 0;
1679         s32 f_precopy_cur_buf = 0;
1680         s32 f_postcopy_cur_buf = 0;
1681         u32 mport;
1682
1683         if (!card->mpa_tx.enabled ||
1684             (card->has_control_mask && (port == CTRL_PORT)) ||
1685             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1686                 mwifiex_dbg(adapter, WARN,
1687                             "info: %s: tx aggregation disabled\n",
1688                             __func__);
1689
1690                 f_send_cur_buf = 1;
1691                 goto tx_curr_single;
1692         }
1693
1694         if (next_pkt_len) {
1695                 /* More pkt in TX queue */
1696                 mwifiex_dbg(adapter, INFO,
1697                             "info: %s: more packets in queue.\n",
1698                             __func__);
1699
1700                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1701                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1702                                 f_precopy_cur_buf = 1;
1703
1704                                 if (!(card->mp_wr_bitmap &
1705                                       (1 << card->curr_wr_port)) ||
1706                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1707                                             card, pkt_len + next_pkt_len))
1708                                         f_send_aggr_buf = 1;
1709                         } else {
1710                                 /* No room in Aggr buf, send it */
1711                                 f_send_aggr_buf = 1;
1712
1713                                 if (!(card->mp_wr_bitmap &
1714                                       (1 << card->curr_wr_port)))
1715                                         f_send_cur_buf = 1;
1716                                 else
1717                                         f_postcopy_cur_buf = 1;
1718                         }
1719                 } else {
1720                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1721                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1722                                 f_precopy_cur_buf = 1;
1723                         else
1724                                 f_send_cur_buf = 1;
1725                 }
1726         } else {
1727                 /* Last pkt in TX queue */
1728                 mwifiex_dbg(adapter, INFO,
1729                             "info: %s: Last packet in Tx Queue.\n",
1730                             __func__);
1731
1732                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1733                         /* some packs in Aggr buf already */
1734                         f_send_aggr_buf = 1;
1735
1736                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1737                                 f_precopy_cur_buf = 1;
1738                         else
1739                                 /* No room in Aggr buf, send it */
1740                                 f_send_cur_buf = 1;
1741                 } else {
1742                         f_send_cur_buf = 1;
1743                 }
1744         }
1745
1746         if (f_precopy_cur_buf) {
1747                 mwifiex_dbg(adapter, DATA,
1748                             "data: %s: precopy current buffer\n",
1749                             __func__);
1750                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1751
1752                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1753                     mp_tx_aggr_port_limit_reached(card))
1754                         /* No more pkts allowed in Aggr buf, send it */
1755                         f_send_aggr_buf = 1;
1756         }
1757
1758         if (f_send_aggr_buf) {
1759                 mwifiex_dbg(adapter, DATA,
1760                             "data: %s: send aggr buffer: %d %d\n",
1761                             __func__, card->mpa_tx.start_port,
1762                             card->mpa_tx.ports);
1763                 if (card->supports_sdio_new_mode) {
1764                         u32 port_count;
1765                         int i;
1766
1767                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1768                                 if (card->mpa_tx.ports & BIT(i))
1769                                         port_count++;
1770
1771                         /* Writing data from "start_port + 0" to "start_port +
1772                          * port_count -1", so decrease the count by 1
1773                          */
1774                         port_count--;
1775                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1776                                  (port_count << 8)) + card->mpa_tx.start_port;
1777                 } else {
1778                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1779                                  (card->mpa_tx.ports << 4)) +
1780                                  card->mpa_tx.start_port;
1781                 }
1782
1783                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1784                                                  card->mpa_tx.buf_len, mport);
1785
1786                 MP_TX_AGGR_BUF_RESET(card);
1787         }
1788
1789 tx_curr_single:
1790         if (f_send_cur_buf) {
1791                 mwifiex_dbg(adapter, DATA,
1792                             "data: %s: send current buffer %d\n",
1793                             __func__, port);
1794                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1795                                                  adapter->ioport + port);
1796         }
1797
1798         if (f_postcopy_cur_buf) {
1799                 mwifiex_dbg(adapter, DATA,
1800                             "data: %s: postcopy current buffer\n",
1801                             __func__);
1802                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1803         }
1804
1805         return ret;
1806 }
1807
1808 /*
1809  * This function downloads data from driver to card.
1810  *
1811  * Both commands and data packets are transferred to the card by this
1812  * function.
1813  *
1814  * This function adds the SDIO specific header to the front of the buffer
1815  * before transferring. The header contains the length of the packet and
1816  * the type. The firmware handles the packets based upon this set type.
1817  */
1818 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1819                                      u8 type, struct sk_buff *skb,
1820                                      struct mwifiex_tx_param *tx_param)
1821 {
1822         struct sdio_mmc_card *card = adapter->card;
1823         int ret;
1824         u32 buf_block_len;
1825         u32 blk_size;
1826         u32 port = CTRL_PORT;
1827         u8 *payload = (u8 *)skb->data;
1828         u32 pkt_len = skb->len;
1829
1830         /* Allocate buffer and copy payload */
1831         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1832         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1833         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1834         *(__le16 *)&payload[2] = cpu_to_le16(type);
1835
1836         /*
1837          * This is SDIO specific header
1838          *  u16 length,
1839          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1840          *  MWIFIEX_TYPE_EVENT = 3)
1841          */
1842         if (type == MWIFIEX_TYPE_DATA) {
1843                 ret = mwifiex_get_wr_port_data(adapter, &port);
1844                 if (ret) {
1845                         mwifiex_dbg(adapter, ERROR,
1846                                     "%s: no wr_port available\n",
1847                                     __func__);
1848                         return ret;
1849                 }
1850         } else {
1851                 adapter->cmd_sent = true;
1852                 /* Type must be MWIFIEX_TYPE_CMD */
1853
1854                 if (pkt_len <= INTF_HEADER_LEN ||
1855                     pkt_len > MWIFIEX_UPLD_SIZE)
1856                         mwifiex_dbg(adapter, ERROR,
1857                                     "%s: payload=%p, nb=%d\n",
1858                                     __func__, payload, pkt_len);
1859
1860                 if (card->supports_sdio_new_mode)
1861                         port = CMD_PORT_SLCT;
1862         }
1863
1864         /* Transfer data to card */
1865         pkt_len = buf_block_len * blk_size;
1866
1867         if (tx_param)
1868                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1869                                                    port, tx_param->next_pkt_len
1870                                                    );
1871         else
1872                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1873                                                    port, 0);
1874
1875         if (ret) {
1876                 if (type == MWIFIEX_TYPE_CMD)
1877                         adapter->cmd_sent = false;
1878                 if (type == MWIFIEX_TYPE_DATA) {
1879                         adapter->data_sent = false;
1880                         /* restore curr_wr_port in error cases */
1881                         card->curr_wr_port = port;
1882                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1883                 }
1884         } else {
1885                 if (type == MWIFIEX_TYPE_DATA) {
1886                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1887                                 adapter->data_sent = true;
1888                         else
1889                                 adapter->data_sent = false;
1890                 }
1891         }
1892
1893         return ret;
1894 }
1895
1896 /*
1897  * This function allocates the MPA Tx and Rx buffers.
1898  */
1899 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1900                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1901 {
1902         struct sdio_mmc_card *card = adapter->card;
1903         u32 rx_buf_size;
1904         int ret = 0;
1905
1906         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1907         if (!card->mpa_tx.buf) {
1908                 ret = -1;
1909                 goto error;
1910         }
1911
1912         card->mpa_tx.buf_size = mpa_tx_buf_size;
1913
1914         rx_buf_size = max_t(u32, mpa_rx_buf_size,
1915                             (u32)SDIO_MAX_AGGR_BUF_SIZE);
1916         card->mpa_rx.buf = kzalloc(rx_buf_size, GFP_KERNEL);
1917         if (!card->mpa_rx.buf) {
1918                 ret = -1;
1919                 goto error;
1920         }
1921
1922         card->mpa_rx.buf_size = rx_buf_size;
1923
1924 error:
1925         if (ret) {
1926                 kfree(card->mpa_tx.buf);
1927                 kfree(card->mpa_rx.buf);
1928         }
1929
1930         return ret;
1931 }
1932
1933 /*
1934  * This function unregisters the SDIO device.
1935  *
1936  * The SDIO IRQ is released, the function is disabled and driver
1937  * data is set to null.
1938  */
1939 static void
1940 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1941 {
1942         struct sdio_mmc_card *card = adapter->card;
1943
1944         if (adapter->card) {
1945                 sdio_claim_host(card->func);
1946                 sdio_disable_func(card->func);
1947                 sdio_release_host(card->func);
1948         }
1949 }
1950
1951 /*
1952  * This function registers the SDIO device.
1953  *
1954  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1955  */
1956 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1957 {
1958         int ret;
1959         struct sdio_mmc_card *card = adapter->card;
1960         struct sdio_func *func = card->func;
1961
1962         /* save adapter pointer in card */
1963         card->adapter = adapter;
1964         adapter->tx_buf_size = card->tx_buf_size;
1965
1966         sdio_claim_host(func);
1967
1968         /* Set block size */
1969         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1970         sdio_release_host(func);
1971         if (ret) {
1972                 mwifiex_dbg(adapter, ERROR,
1973                             "cannot set SDIO block size\n");
1974                 return ret;
1975         }
1976
1977
1978         adapter->dev = &func->dev;
1979
1980         strcpy(adapter->fw_name, card->firmware);
1981         if (card->fw_dump_enh) {
1982                 adapter->mem_type_mapping_tbl = generic_mem_type_map;
1983                 adapter->num_mem_types = 1;
1984         } else {
1985                 adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1986                 adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1987         }
1988
1989         return 0;
1990 }
1991
1992 /*
1993  * This function initializes the SDIO driver.
1994  *
1995  * The following initializations steps are followed -
1996  *      - Read the Host interrupt status register to acknowledge
1997  *        the first interrupt got from bootloader
1998  *      - Disable host interrupt mask register
1999  *      - Get SDIO port
2000  *      - Initialize SDIO variables in card
2001  *      - Allocate MP registers
2002  *      - Allocate MPA Tx and Rx buffers
2003  */
2004 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
2005 {
2006         struct sdio_mmc_card *card = adapter->card;
2007         const struct mwifiex_sdio_card_reg *reg = card->reg;
2008         int ret;
2009         u8 sdio_ireg;
2010
2011         sdio_set_drvdata(card->func, card);
2012
2013         /*
2014          * Read the host_int_status_reg for ACK the first interrupt got
2015          * from the bootloader. If we don't do this we get a interrupt
2016          * as soon as we register the irq.
2017          */
2018         mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
2019
2020         /* Get SDIO ioport */
2021         mwifiex_init_sdio_ioport(adapter);
2022
2023         /* Initialize SDIO variables in card */
2024         card->mp_rd_bitmap = 0;
2025         card->mp_wr_bitmap = 0;
2026         card->curr_rd_port = reg->start_rd_port;
2027         card->curr_wr_port = reg->start_wr_port;
2028
2029         card->mp_data_port_mask = reg->data_port_mask;
2030
2031         card->mpa_tx.buf_len = 0;
2032         card->mpa_tx.pkt_cnt = 0;
2033         card->mpa_tx.start_port = 0;
2034
2035         card->mpa_tx.enabled = 1;
2036         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2037
2038         card->mpa_rx.buf_len = 0;
2039         card->mpa_rx.pkt_cnt = 0;
2040         card->mpa_rx.start_port = 0;
2041
2042         card->mpa_rx.enabled = 1;
2043         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2044
2045         /* Allocate buffers for SDIO MP-A */
2046         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
2047         if (!card->mp_regs)
2048                 return -ENOMEM;
2049
2050         /* Allocate skb pointer buffers */
2051         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
2052                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2053         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
2054                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2055         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
2056                                              card->mp_tx_agg_buf_size,
2057                                              card->mp_rx_agg_buf_size);
2058         if (ret) {
2059                 mwifiex_dbg(adapter, ERROR,
2060                             "failed to alloc sdio mp-a buffers\n");
2061                 kfree(card->mp_regs);
2062                 return -1;
2063         }
2064
2065         adapter->auto_tdls = card->can_auto_tdls;
2066         adapter->ext_scan = card->can_ext_scan;
2067         return ret;
2068 }
2069
2070 /*
2071  * This function resets the MPA Tx and Rx buffers.
2072  */
2073 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
2074 {
2075         struct sdio_mmc_card *card = adapter->card;
2076
2077         MP_TX_AGGR_BUF_RESET(card);
2078         MP_RX_AGGR_BUF_RESET(card);
2079 }
2080
2081 /*
2082  * This function cleans up the allocated card buffers.
2083  *
2084  * The following are freed by this function -
2085  *      - MP registers
2086  *      - MPA Tx buffer
2087  *      - MPA Rx buffer
2088  */
2089 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
2090 {
2091         struct sdio_mmc_card *card = adapter->card;
2092
2093         kfree(card->mp_regs);
2094         kfree(card->mpa_rx.skb_arr);
2095         kfree(card->mpa_rx.len_arr);
2096         kfree(card->mpa_tx.buf);
2097         kfree(card->mpa_rx.buf);
2098         sdio_set_drvdata(card->func, NULL);
2099         kfree(card);
2100 }
2101
2102 /*
2103  * This function updates the MP end port in card.
2104  */
2105 static void
2106 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
2107 {
2108         struct sdio_mmc_card *card = adapter->card;
2109         const struct mwifiex_sdio_card_reg *reg = card->reg;
2110         int i;
2111
2112         card->mp_end_port = port;
2113
2114         card->mp_data_port_mask = reg->data_port_mask;
2115
2116         if (reg->start_wr_port) {
2117                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
2118                         card->mp_data_port_mask &=
2119                                         ~(1 << (card->max_ports - i));
2120         }
2121
2122         card->curr_wr_port = reg->start_wr_port;
2123
2124         mwifiex_dbg(adapter, CMD,
2125                     "cmd: mp_end_port %d, data port mask 0x%x\n",
2126                     port, card->mp_data_port_mask);
2127 }
2128
2129 static void mwifiex_recreate_adapter(struct sdio_mmc_card *card)
2130 {
2131         struct sdio_func *func = card->func;
2132         const struct sdio_device_id *device_id = card->device_id;
2133
2134         /* TODO mmc_hw_reset does not require destroying and re-probing the
2135          * whole adapter. Hence there was no need to for this rube-goldberg
2136          * design to reload the fw from an external workqueue. If we don't
2137          * destroy the adapter we could reload the fw from
2138          * mwifiex_main_work_queue directly.
2139          * The real difficulty with fw reset is to restore all the user
2140          * settings applied through ioctl. By destroying and recreating the
2141          * adapter, we take the easy way out, since we rely on user space to
2142          * restore them. We assume that user space will treat the new
2143          * incarnation of the adapter(interfaces) as if they had been just
2144          * discovered and initializes them from scratch.
2145          */
2146
2147         mwifiex_sdio_remove(func);
2148
2149         /* power cycle the adapter */
2150         sdio_claim_host(func);
2151         mmc_hw_reset(func->card->host);
2152         sdio_release_host(func);
2153
2154         mwifiex_sdio_probe(func, device_id);
2155 }
2156
2157 static struct mwifiex_adapter *save_adapter;
2158 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
2159 {
2160         struct sdio_mmc_card *card = adapter->card;
2161
2162         /* TODO card pointer is unprotected. If the adapter is removed
2163          * physically, sdio core might trigger mwifiex_sdio_remove, before this
2164          * workqueue is run, which will destroy the adapter struct. When this
2165          * workqueue eventually exceutes it will dereference an invalid adapter
2166          * pointer
2167          */
2168         mwifiex_recreate_adapter(card);
2169 }
2170
2171 /* This function read/write firmware */
2172 static enum
2173 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
2174                                        u8 doneflag)
2175 {
2176         struct sdio_mmc_card *card = adapter->card;
2177         int ret, tries;
2178         u8 ctrl_data = 0;
2179
2180         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2181                     card->reg->fw_dump_ctrl, &ret);
2182         if (ret) {
2183                 mwifiex_dbg(adapter, ERROR, "SDIO Write ERR\n");
2184                 return RDWR_STATUS_FAILURE;
2185         }
2186         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2187                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
2188                                        &ret);
2189                 if (ret) {
2190                         mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2191                         return RDWR_STATUS_FAILURE;
2192                 }
2193                 if (ctrl_data == FW_DUMP_DONE)
2194                         break;
2195                 if (doneflag && ctrl_data == doneflag)
2196                         return RDWR_STATUS_DONE;
2197                 if (ctrl_data != card->reg->fw_dump_host_ready) {
2198                         mwifiex_dbg(adapter, WARN,
2199                                     "The ctrl reg was changed, re-try again\n");
2200                         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2201                                     card->reg->fw_dump_ctrl, &ret);
2202                         if (ret) {
2203                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2204                                 return RDWR_STATUS_FAILURE;
2205                         }
2206                 }
2207                 usleep_range(100, 200);
2208         }
2209         if (ctrl_data == card->reg->fw_dump_host_ready) {
2210                 mwifiex_dbg(adapter, ERROR,
2211                             "Fail to pull ctrl_data\n");
2212                 return RDWR_STATUS_FAILURE;
2213         }
2214
2215         return RDWR_STATUS_SUCCESS;
2216 }
2217
2218 /* This function dump firmware memory to file */
2219 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2220 {
2221         struct sdio_mmc_card *card = adapter->card;
2222         int ret = 0;
2223         unsigned int reg, reg_start, reg_end;
2224         u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2225         enum rdwr_status stat;
2226         u32 memory_size;
2227
2228         if (!card->can_dump_fw)
2229                 return;
2230
2231         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2232                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2233
2234                 if (entry->mem_ptr) {
2235                         vfree(entry->mem_ptr);
2236                         entry->mem_ptr = NULL;
2237                 }
2238                 entry->mem_size = 0;
2239         }
2240
2241         mwifiex_pm_wakeup_card(adapter);
2242         sdio_claim_host(card->func);
2243
2244         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2245
2246         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2247         if (stat == RDWR_STATUS_FAILURE)
2248                 goto done;
2249
2250         reg = card->reg->fw_dump_start;
2251         /* Read the number of the memories which will dump */
2252         dump_num = sdio_readb(card->func, reg, &ret);
2253         if (ret) {
2254                 mwifiex_dbg(adapter, ERROR, "SDIO read memory length err\n");
2255                 goto done;
2256         }
2257
2258         /* Read the length of every memory which will dump */
2259         for (idx = 0; idx < dump_num; idx++) {
2260                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2261
2262                 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2263                 if (stat == RDWR_STATUS_FAILURE)
2264                         goto done;
2265
2266                 memory_size = 0;
2267                 reg = card->reg->fw_dump_start;
2268                 for (i = 0; i < 4; i++) {
2269                         read_reg = sdio_readb(card->func, reg, &ret);
2270                         if (ret) {
2271                                 mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2272                                 goto done;
2273                         }
2274                         memory_size |= (read_reg << i*8);
2275                         reg++;
2276                 }
2277
2278                 if (memory_size == 0) {
2279                         mwifiex_dbg(adapter, DUMP, "Firmware dump Finished!\n");
2280                         ret = mwifiex_write_reg(adapter,
2281                                                 card->reg->fw_dump_ctrl,
2282                                                 FW_DUMP_READ_DONE);
2283                         if (ret) {
2284                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2285                                 return;
2286                         }
2287                         break;
2288                 }
2289
2290                 mwifiex_dbg(adapter, DUMP,
2291                             "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2292                 entry->mem_ptr = vmalloc(memory_size + 1);
2293                 entry->mem_size = memory_size;
2294                 if (!entry->mem_ptr) {
2295                         mwifiex_dbg(adapter, ERROR, "Vmalloc %s failed\n",
2296                                     entry->mem_name);
2297                         goto done;
2298                 }
2299                 dbg_ptr = entry->mem_ptr;
2300                 end_ptr = dbg_ptr + memory_size;
2301
2302                 doneflag = entry->done_flag;
2303                 mwifiex_dbg(adapter, DUMP,
2304                             "Start %s output, please wait...\n",
2305                             entry->mem_name);
2306
2307                 do {
2308                         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2309                         if (stat == RDWR_STATUS_FAILURE)
2310                                 goto done;
2311
2312                         reg_start = card->reg->fw_dump_start;
2313                         reg_end = card->reg->fw_dump_end;
2314                         for (reg = reg_start; reg <= reg_end; reg++) {
2315                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2316                                 if (ret) {
2317                                         mwifiex_dbg(adapter, ERROR,
2318                                                     "SDIO read err\n");
2319                                         goto done;
2320                                 }
2321                                 if (dbg_ptr < end_ptr)
2322                                         dbg_ptr++;
2323                                 else
2324                                         mwifiex_dbg(adapter, ERROR,
2325                                                     "Allocated buf not enough\n");
2326                         }
2327
2328                         if (stat != RDWR_STATUS_DONE)
2329                                 continue;
2330
2331                         mwifiex_dbg(adapter, DUMP, "%s done: size=0x%tx\n",
2332                                     entry->mem_name, dbg_ptr - entry->mem_ptr);
2333                         break;
2334                 } while (1);
2335         }
2336         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2337
2338 done:
2339         sdio_release_host(card->func);
2340 }
2341
2342 static void mwifiex_sdio_generic_fw_dump(struct mwifiex_adapter *adapter)
2343 {
2344         struct sdio_mmc_card *card = adapter->card;
2345         struct memory_type_mapping *entry = &generic_mem_type_map[0];
2346         unsigned int reg, reg_start, reg_end;
2347         u8 start_flag = 0, done_flag = 0;
2348         u8 *dbg_ptr, *end_ptr;
2349         enum rdwr_status stat;
2350         int ret = -1, tries;
2351
2352         if (!card->fw_dump_enh)
2353                 return;
2354
2355         if (entry->mem_ptr) {
2356                 vfree(entry->mem_ptr);
2357                 entry->mem_ptr = NULL;
2358         }
2359         entry->mem_size = 0;
2360
2361         mwifiex_pm_wakeup_card(adapter);
2362         sdio_claim_host(card->func);
2363
2364         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2365
2366         stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2367         if (stat == RDWR_STATUS_FAILURE)
2368                 goto done;
2369
2370         reg_start = card->reg->fw_dump_start;
2371         reg_end = card->reg->fw_dump_end;
2372         for (reg = reg_start; reg <= reg_end; reg++) {
2373                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2374                         start_flag = sdio_readb(card->func, reg, &ret);
2375                         if (ret) {
2376                                 mwifiex_dbg(adapter, ERROR,
2377                                             "SDIO read err\n");
2378                                 goto done;
2379                         }
2380                         if (start_flag == 0)
2381                                 break;
2382                         if (tries == MAX_POLL_TRIES) {
2383                                 mwifiex_dbg(adapter, ERROR,
2384                                             "FW not ready to dump\n");
2385                                 ret = -1;
2386                                 goto done;
2387                         }
2388                 }
2389                 usleep_range(100, 200);
2390         }
2391
2392         entry->mem_ptr = vmalloc(0xf0000 + 1);
2393         if (!entry->mem_ptr) {
2394                 ret = -1;
2395                 goto done;
2396         }
2397         dbg_ptr = entry->mem_ptr;
2398         entry->mem_size = 0xf0000;
2399         end_ptr = dbg_ptr + entry->mem_size;
2400
2401         done_flag = entry->done_flag;
2402         mwifiex_dbg(adapter, DUMP,
2403                     "Start %s output, please wait...\n", entry->mem_name);
2404
2405         while (true) {
2406                 stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2407                 if (stat == RDWR_STATUS_FAILURE)
2408                         goto done;
2409                 for (reg = reg_start; reg <= reg_end; reg++) {
2410                         *dbg_ptr = sdio_readb(card->func, reg, &ret);
2411                         if (ret) {
2412                                 mwifiex_dbg(adapter, ERROR,
2413                                             "SDIO read err\n");
2414                                 goto done;
2415                         }
2416                         dbg_ptr++;
2417                         if (dbg_ptr >= end_ptr) {
2418                                 u8 *tmp_ptr;
2419
2420                                 tmp_ptr = vmalloc(entry->mem_size + 0x4000 + 1);
2421                                 if (!tmp_ptr)
2422                                         goto done;
2423
2424                                 memcpy(tmp_ptr, entry->mem_ptr,
2425                                        entry->mem_size);
2426                                 vfree(entry->mem_ptr);
2427                                 entry->mem_ptr = tmp_ptr;
2428                                 tmp_ptr = NULL;
2429                                 dbg_ptr = entry->mem_ptr + entry->mem_size;
2430                                 entry->mem_size += 0x4000;
2431                                 end_ptr = entry->mem_ptr + entry->mem_size;
2432                         }
2433                 }
2434                 if (stat == RDWR_STATUS_DONE) {
2435                         entry->mem_size = dbg_ptr - entry->mem_ptr;
2436                         mwifiex_dbg(adapter, DUMP, "dump %s done size=0x%x\n",
2437                                     entry->mem_name, entry->mem_size);
2438                         ret = 0;
2439                         break;
2440                 }
2441         }
2442         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2443
2444 done:
2445         if (ret) {
2446                 mwifiex_dbg(adapter, ERROR, "firmware dump failed\n");
2447                 if (entry->mem_ptr) {
2448                         vfree(entry->mem_ptr);
2449                         entry->mem_ptr = NULL;
2450                 }
2451                 entry->mem_size = 0;
2452         }
2453         sdio_release_host(card->func);
2454 }
2455
2456 static void mwifiex_sdio_device_dump_work(struct mwifiex_adapter *adapter)
2457 {
2458         struct sdio_mmc_card *card = adapter->card;
2459
2460         mwifiex_drv_info_dump(adapter);
2461         if (card->fw_dump_enh)
2462                 mwifiex_sdio_generic_fw_dump(adapter);
2463         else
2464                 mwifiex_sdio_fw_dump(adapter);
2465         mwifiex_upload_device_dump(adapter);
2466 }
2467
2468 static void mwifiex_sdio_work(struct work_struct *work)
2469 {
2470         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP,
2471                                &iface_work_flags))
2472                 mwifiex_sdio_device_dump_work(save_adapter);
2473         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2474                                &iface_work_flags))
2475                 mwifiex_sdio_card_reset_work(save_adapter);
2476 }
2477
2478 static DECLARE_WORK(sdio_work, mwifiex_sdio_work);
2479 /* This function resets the card */
2480 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2481 {
2482         save_adapter = adapter;
2483         if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags))
2484                 return;
2485
2486         set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);
2487
2488         schedule_work(&sdio_work);
2489 }
2490
2491 /* This function dumps FW information */
2492 static void mwifiex_sdio_device_dump(struct mwifiex_adapter *adapter)
2493 {
2494         save_adapter = adapter;
2495         if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags))
2496                 return;
2497
2498         set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags);
2499         schedule_work(&sdio_work);
2500 }
2501
2502 /* Function to dump SDIO function registers and SDIO scratch registers in case
2503  * of FW crash
2504  */
2505 static int
2506 mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
2507 {
2508         char *p = drv_buf;
2509         struct sdio_mmc_card *cardp = adapter->card;
2510         int ret = 0;
2511         u8 count, func, data, index = 0, size = 0;
2512         u8 reg, reg_start, reg_end;
2513         char buf[256], *ptr;
2514
2515         if (!p)
2516                 return 0;
2517
2518         mwifiex_dbg(adapter, MSG, "SDIO register dump start\n");
2519
2520         mwifiex_pm_wakeup_card(adapter);
2521
2522         sdio_claim_host(cardp->func);
2523
2524         for (count = 0; count < 5; count++) {
2525                 memset(buf, 0, sizeof(buf));
2526                 ptr = buf;
2527
2528                 switch (count) {
2529                 case 0:
2530                         /* Read the registers of SDIO function0 */
2531                         func = count;
2532                         reg_start = 0;
2533                         reg_end = 9;
2534                         break;
2535                 case 1:
2536                         /* Read the registers of SDIO function1 */
2537                         func = count;
2538                         reg_start = cardp->reg->func1_dump_reg_start;
2539                         reg_end = cardp->reg->func1_dump_reg_end;
2540                         break;
2541                 case 2:
2542                         index = 0;
2543                         func = 1;
2544                         reg_start = cardp->reg->func1_spec_reg_table[index++];
2545                         size = cardp->reg->func1_spec_reg_num;
2546                         reg_end = cardp->reg->func1_spec_reg_table[size-1];
2547                         break;
2548                 default:
2549                         /* Read the scratch registers of SDIO function1 */
2550                         if (count == 4)
2551                                 mdelay(100);
2552                         func = 1;
2553                         reg_start = cardp->reg->func1_scratch_reg;
2554                         reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
2555                 }
2556
2557                 if (count != 2)
2558                         ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
2559                                        func, reg_start, reg_end);
2560                 else
2561                         ptr += sprintf(ptr, "SDIO Func%d: ", func);
2562
2563                 for (reg = reg_start; reg <= reg_end;) {
2564                         if (func == 0)
2565                                 data = sdio_f0_readb(cardp->func, reg, &ret);
2566                         else
2567                                 data = sdio_readb(cardp->func, reg, &ret);
2568
2569                         if (count == 2)
2570                                 ptr += sprintf(ptr, "(%#x) ", reg);
2571                         if (!ret) {
2572                                 ptr += sprintf(ptr, "%02x ", data);
2573                         } else {
2574                                 ptr += sprintf(ptr, "ERR");
2575                                 break;
2576                         }
2577
2578                         if (count == 2 && reg < reg_end)
2579                                 reg = cardp->reg->func1_spec_reg_table[index++];
2580                         else
2581                                 reg++;
2582                 }
2583
2584                 mwifiex_dbg(adapter, MSG, "%s\n", buf);
2585                 p += sprintf(p, "%s\n", buf);
2586         }
2587
2588         sdio_release_host(cardp->func);
2589
2590         mwifiex_dbg(adapter, MSG, "SDIO register dump end\n");
2591
2592         return p - drv_buf;
2593 }
2594
2595 static struct mwifiex_if_ops sdio_ops = {
2596         .init_if = mwifiex_init_sdio,
2597         .cleanup_if = mwifiex_cleanup_sdio,
2598         .check_fw_status = mwifiex_check_fw_status,
2599         .prog_fw = mwifiex_prog_fw_w_helper,
2600         .register_dev = mwifiex_register_dev,
2601         .unregister_dev = mwifiex_unregister_dev,
2602         .enable_int = mwifiex_sdio_enable_host_int,
2603         .disable_int = mwifiex_sdio_disable_host_int,
2604         .process_int_status = mwifiex_process_int_status,
2605         .host_to_card = mwifiex_sdio_host_to_card,
2606         .wakeup = mwifiex_pm_wakeup_card,
2607         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2608
2609         /* SDIO specific */
2610         .update_mp_end_port = mwifiex_update_mp_end_port,
2611         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2612         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2613         .event_complete = mwifiex_sdio_event_complete,
2614         .card_reset = mwifiex_sdio_card_reset,
2615         .reg_dump = mwifiex_sdio_reg_dump,
2616         .device_dump = mwifiex_sdio_device_dump,
2617         .deaggr_pkt = mwifiex_deaggr_sdio_pkt,
2618 };
2619
2620 /*
2621  * This function initializes the SDIO driver.
2622  *
2623  * This initiates the semaphore and registers the device with
2624  * SDIO bus.
2625  */
2626 static int
2627 mwifiex_sdio_init_module(void)
2628 {
2629         sema_init(&add_remove_card_sem, 1);
2630
2631         /* Clear the flag in case user removes the card. */
2632         user_rmmod = 0;
2633
2634         return sdio_register_driver(&mwifiex_sdio);
2635 }
2636
2637 /*
2638  * This function cleans up the SDIO driver.
2639  *
2640  * The following major steps are followed for cleanup -
2641  *      - Resume the device if its suspended
2642  *      - Disconnect the device if connected
2643  *      - Shutdown the firmware
2644  *      - Unregister the device from SDIO bus.
2645  */
2646 static void
2647 mwifiex_sdio_cleanup_module(void)
2648 {
2649         if (!down_interruptible(&add_remove_card_sem))
2650                 up(&add_remove_card_sem);
2651
2652         /* Set the flag as user is removing this module. */
2653         user_rmmod = 1;
2654         cancel_work_sync(&sdio_work);
2655
2656         sdio_unregister_driver(&mwifiex_sdio);
2657 }
2658
2659 module_init(mwifiex_sdio_init_module);
2660 module_exit(mwifiex_sdio_cleanup_module);
2661
2662 MODULE_AUTHOR("Marvell International Ltd.");
2663 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2664 MODULE_VERSION(SDIO_VERSION);
2665 MODULE_LICENSE("GPL v2");
2666 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2667 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2668 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2669 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2670 MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);
2671 MODULE_FIRMWARE(SD8997_DEFAULT_FW_NAME);