drivers/net/wireless/marvell/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_SYNC_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_err("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 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1044                                    u32 poll_num)
1045 {
1046         int ret = 0;
1047         u16 firmware_stat;
1048         u32 tries;
1049
1050         for (tries = 0; tries < poll_num; tries++) {
1051                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1052                 if (ret)
1053                         continue;
1054                 if (firmware_stat == FIRMWARE_READY_SDIO) {
1055                         ret = 0;
1056                         break;
1057                 } else {
1058                         msleep(100);
1059                         ret = -1;
1060                 }
1061         }
1062
1063         return ret;
1064 }
1065
1066 /* This function checks if WLAN is the winner.
1067  */
1068 static int mwifiex_check_winner_status(struct mwifiex_adapter *adapter)
1069 {
1070         int ret = 0;
1071         u8 winner = 0;
1072         struct sdio_mmc_card *card = adapter->card;
1073
1074         if (mwifiex_read_reg(adapter, card->reg->status_reg_0, &winner))
1075                 return -1;
1076
1077         if (winner)
1078                 adapter->winner = 0;
1079         else
1080                 adapter->winner = 1;
1081
1082         return ret;
1083 }
1084
1085 /*
1086  * This function decode sdio aggreation pkt.
1087  *
1088  * Based on the the data block size and pkt_len,
1089  * skb data will be decoded to few packets.
1090  */
1091 static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
1092                                     struct sk_buff *skb)
1093 {
1094         u32 total_pkt_len, pkt_len;
1095         struct sk_buff *skb_deaggr;
1096         u32 pkt_type;
1097         u16 blk_size;
1098         u8 blk_num;
1099         u8 *data;
1100
1101         data = skb->data;
1102         total_pkt_len = skb->len;
1103
1104         while (total_pkt_len >= (SDIO_HEADER_OFFSET + INTF_HEADER_LEN)) {
1105                 if (total_pkt_len < adapter->sdio_rx_block_size)
1106                         break;
1107                 blk_num = *(data + BLOCK_NUMBER_OFFSET);
1108                 blk_size = adapter->sdio_rx_block_size * blk_num;
1109                 if (blk_size > total_pkt_len) {
1110                         mwifiex_dbg(adapter, ERROR,
1111                                     "%s: error in blk_size,\t"
1112                                     "blk_num=%d, blk_size=%d, total_pkt_len=%d\n",
1113                                     __func__, blk_num, blk_size, total_pkt_len);
1114                         break;
1115                 }
1116                 pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
1117                 pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
1118                                          2));
1119                 if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
1120                         mwifiex_dbg(adapter, ERROR,
1121                                     "%s: error in pkt_len,\t"
1122                                     "pkt_len=%d, blk_size=%d\n",
1123                                     __func__, pkt_len, blk_size);
1124                         break;
1125                 }
1126                 skb_deaggr = mwifiex_alloc_dma_align_buf(pkt_len,
1127                                                          GFP_KERNEL | GFP_DMA);
1128                 if (!skb_deaggr)
1129                         break;
1130                 skb_put(skb_deaggr, pkt_len);
1131                 memcpy(skb_deaggr->data, data + SDIO_HEADER_OFFSET, pkt_len);
1132                 skb_pull(skb_deaggr, INTF_HEADER_LEN);
1133
1134                 mwifiex_handle_rx_packet(adapter, skb_deaggr);
1135                 data += blk_size;
1136                 total_pkt_len -= blk_size;
1137         }
1138 }
1139
1140 /*
1141  * This function decodes a received packet.
1142  *
1143  * Based on the type, the packet is treated as either a data, or
1144  * a command response, or an event, and the correct handler
1145  * function is invoked.
1146  */
1147 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1148                                     struct sk_buff *skb, u32 upld_typ)
1149 {
1150         u8 *cmd_buf;
1151         __le16 *curr_ptr = (__le16 *)skb->data;
1152         u16 pkt_len = le16_to_cpu(*curr_ptr);
1153         struct mwifiex_rxinfo *rx_info;
1154
1155         if (upld_typ != MWIFIEX_TYPE_AGGR_DATA) {
1156                 skb_trim(skb, pkt_len);
1157                 skb_pull(skb, INTF_HEADER_LEN);
1158         }
1159
1160         switch (upld_typ) {
1161         case MWIFIEX_TYPE_AGGR_DATA:
1162                 mwifiex_dbg(adapter, INFO,
1163                             "info: --- Rx: Aggr Data packet ---\n");
1164                 rx_info = MWIFIEX_SKB_RXCB(skb);
1165                 rx_info->buf_type = MWIFIEX_TYPE_AGGR_DATA;
1166                 if (adapter->rx_work_enabled) {
1167                         skb_queue_tail(&adapter->rx_data_q, skb);
1168                         atomic_inc(&adapter->rx_pending);
1169                         adapter->data_received = true;
1170                 } else {
1171                         mwifiex_deaggr_sdio_pkt(adapter, skb);
1172                         dev_kfree_skb_any(skb);
1173                 }
1174                 break;
1175
1176         case MWIFIEX_TYPE_DATA:
1177                 mwifiex_dbg(adapter, DATA,
1178                             "info: --- Rx: Data packet ---\n");
1179                 if (adapter->rx_work_enabled) {
1180                         skb_queue_tail(&adapter->rx_data_q, skb);
1181                         adapter->data_received = true;
1182                         atomic_inc(&adapter->rx_pending);
1183                 } else {
1184                         mwifiex_handle_rx_packet(adapter, skb);
1185                 }
1186                 break;
1187
1188         case MWIFIEX_TYPE_CMD:
1189                 mwifiex_dbg(adapter, CMD,
1190                             "info: --- Rx: Cmd Response ---\n");
1191                 /* take care of curr_cmd = NULL case */
1192                 if (!adapter->curr_cmd) {
1193                         cmd_buf = adapter->upld_buf;
1194
1195                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1196                                 mwifiex_process_sleep_confirm_resp(adapter,
1197                                                                    skb->data,
1198                                                                    skb->len);
1199
1200                         memcpy(cmd_buf, skb->data,
1201                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1202                                      skb->len));
1203
1204                         dev_kfree_skb_any(skb);
1205                 } else {
1206                         adapter->cmd_resp_received = true;
1207                         adapter->curr_cmd->resp_skb = skb;
1208                 }
1209                 break;
1210
1211         case MWIFIEX_TYPE_EVENT:
1212                 mwifiex_dbg(adapter, EVENT,
1213                             "info: --- Rx: Event ---\n");
1214                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1215
1216                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1217                         memcpy(adapter->event_body,
1218                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1219                                skb->len);
1220
1221                 /* event cause has been saved to adapter->event_cause */
1222                 adapter->event_received = true;
1223                 adapter->event_skb = skb;
1224
1225                 break;
1226
1227         default:
1228                 mwifiex_dbg(adapter, ERROR,
1229                             "unknown upload type %#x\n", upld_typ);
1230                 dev_kfree_skb_any(skb);
1231                 break;
1232         }
1233
1234         return 0;
1235 }
1236
1237 /*
1238  * This function transfers received packets from card to driver, performing
1239  * aggregation if required.
1240  *
1241  * For data received on control port, or if aggregation is disabled, the
1242  * received buffers are uploaded as separate packets. However, if aggregation
1243  * is enabled and required, the buffers are copied onto an aggregation buffer,
1244  * provided there is space left, processed and finally uploaded.
1245  */
1246 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1247                                              u16 rx_len, u8 port)
1248 {
1249         struct sdio_mmc_card *card = adapter->card;
1250         s32 f_do_rx_aggr = 0;
1251         s32 f_do_rx_cur = 0;
1252         s32 f_aggr_cur = 0;
1253         s32 f_post_aggr_cur = 0;
1254         struct sk_buff *skb_deaggr;
1255         struct sk_buff *skb = NULL;
1256         u32 pkt_len, pkt_type, mport, pind;
1257         u8 *curr_ptr;
1258
1259         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1260                 /* Read the command Resp without aggr */
1261                 mwifiex_dbg(adapter, CMD,
1262                             "info: %s: no aggregation for cmd\t"
1263                             "response\n", __func__);
1264
1265                 f_do_rx_cur = 1;
1266                 goto rx_curr_single;
1267         }
1268
1269         if (!card->mpa_rx.enabled) {
1270                 mwifiex_dbg(adapter, WARN,
1271                             "info: %s: rx aggregation disabled\n",
1272                             __func__);
1273
1274                 f_do_rx_cur = 1;
1275                 goto rx_curr_single;
1276         }
1277
1278         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1279                                          card->reg->data_port_mask)) ||
1280             (card->has_control_mask && (card->mp_rd_bitmap &
1281                                         (~((u32) CTRL_PORT_MASK))))) {
1282                 /* Some more data RX pending */
1283                 mwifiex_dbg(adapter, INFO,
1284                             "info: %s: not last packet\n", __func__);
1285
1286                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1287                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len)) {
1288                                 f_aggr_cur = 1;
1289                         } else {
1290                                 /* No room in Aggr buf, do rx aggr now */
1291                                 f_do_rx_aggr = 1;
1292                                 f_post_aggr_cur = 1;
1293                         }
1294                 } else {
1295                         /* Rx aggr not in progress */
1296                         f_aggr_cur = 1;
1297                 }
1298
1299         } else {
1300                 /* No more data RX pending */
1301                 mwifiex_dbg(adapter, INFO,
1302                             "info: %s: last packet\n", __func__);
1303
1304                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1305                         f_do_rx_aggr = 1;
1306                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len))
1307                                 f_aggr_cur = 1;
1308                         else
1309                                 /* No room in Aggr buf, do rx aggr now */
1310                                 f_do_rx_cur = 1;
1311                 } else {
1312                         f_do_rx_cur = 1;
1313                 }
1314         }
1315
1316         if (f_aggr_cur) {
1317                 mwifiex_dbg(adapter, INFO,
1318                             "info: current packet aggregation\n");
1319                 /* Curr pkt can be aggregated */
1320                 mp_rx_aggr_setup(card, rx_len, port);
1321
1322                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1323                     mp_rx_aggr_port_limit_reached(card)) {
1324                         mwifiex_dbg(adapter, INFO,
1325                                     "info: %s: aggregated packet\t"
1326                                     "limit reached\n", __func__);
1327                         /* No more pkts allowed in Aggr buf, rx it */
1328                         f_do_rx_aggr = 1;
1329                 }
1330         }
1331
1332         if (f_do_rx_aggr) {
1333                 /* do aggr RX now */
1334                 mwifiex_dbg(adapter, DATA,
1335                             "info: do_rx_aggr: num of packets: %d\n",
1336                             card->mpa_rx.pkt_cnt);
1337
1338                 if (card->supports_sdio_new_mode) {
1339                         int i;
1340                         u32 port_count;
1341
1342                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1343                                 if (card->mpa_rx.ports & BIT(i))
1344                                         port_count++;
1345
1346                         /* Reading data from "start_port + 0" to "start_port +
1347                          * port_count -1", so decrease the count by 1
1348                          */
1349                         port_count--;
1350                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1351                                  (port_count << 8)) + card->mpa_rx.start_port;
1352                 } else {
1353                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1354                                  (card->mpa_rx.ports << 4)) +
1355                                  card->mpa_rx.start_port;
1356                 }
1357
1358                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1359                                            card->mpa_rx.buf_len, mport, 1))
1360                         goto error;
1361
1362                 curr_ptr = card->mpa_rx.buf;
1363
1364                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1365                         u32 *len_arr = card->mpa_rx.len_arr;
1366
1367                         /* get curr PKT len & type */
1368                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1369                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1370
1371                         /* copy pkt to deaggr buf */
1372                         skb_deaggr = mwifiex_alloc_dma_align_buf(len_arr[pind],
1373                                                                  GFP_KERNEL |
1374                                                                  GFP_DMA);
1375                         if (!skb_deaggr) {
1376                                 mwifiex_dbg(adapter, ERROR, "skb allocation failure\t"
1377                                             "drop pkt len=%d type=%d\n",
1378                                             pkt_len, pkt_type);
1379                                 curr_ptr += len_arr[pind];
1380                                 continue;
1381                         }
1382
1383                         skb_put(skb_deaggr, len_arr[pind]);
1384
1385                         if ((pkt_type == MWIFIEX_TYPE_DATA ||
1386                              (pkt_type == MWIFIEX_TYPE_AGGR_DATA &&
1387                               adapter->sdio_rx_aggr_enable)) &&
1388                             (pkt_len <= len_arr[pind])) {
1389
1390                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1391
1392                                 skb_trim(skb_deaggr, pkt_len);
1393
1394                                 /* Process de-aggr packet */
1395                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1396                                                          pkt_type);
1397                         } else {
1398                                 mwifiex_dbg(adapter, ERROR,
1399                                             "drop wrong aggr pkt:\t"
1400                                             "sdio_single_port_rx_aggr=%d\t"
1401                                             "type=%d len=%d max_len=%d\n",
1402                                             adapter->sdio_rx_aggr_enable,
1403                                             pkt_type, pkt_len, len_arr[pind]);
1404                                 dev_kfree_skb_any(skb_deaggr);
1405                         }
1406                         curr_ptr += len_arr[pind];
1407                 }
1408                 MP_RX_AGGR_BUF_RESET(card);
1409         }
1410
1411 rx_curr_single:
1412         if (f_do_rx_cur) {
1413                 mwifiex_dbg(adapter, INFO, "info: RX: port: %d, rx_len: %d\n",
1414                             port, rx_len);
1415
1416                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1417                 if (!skb) {
1418                         mwifiex_dbg(adapter, ERROR,
1419                                     "single skb allocated fail,\t"
1420                                     "drop pkt port=%d len=%d\n", port, rx_len);
1421                         if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1422                                                       card->mpa_rx.buf, rx_len,
1423                                                       adapter->ioport + port))
1424                                 goto error;
1425                         return 0;
1426                 }
1427
1428                 skb_put(skb, rx_len);
1429
1430                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1431                                               skb->data, skb->len,
1432                                               adapter->ioport + port))
1433                         goto error;
1434                 if (!adapter->sdio_rx_aggr_enable &&
1435                     pkt_type == MWIFIEX_TYPE_AGGR_DATA) {
1436                         mwifiex_dbg(adapter, ERROR, "drop wrong pkt type %d\t"
1437                                     "current SDIO RX Aggr not enabled\n",
1438                                     pkt_type);
1439                         dev_kfree_skb_any(skb);
1440                         return 0;
1441                 }
1442
1443                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1444         }
1445         if (f_post_aggr_cur) {
1446                 mwifiex_dbg(adapter, INFO,
1447                             "info: current packet aggregation\n");
1448                 /* Curr pkt can be aggregated */
1449                 mp_rx_aggr_setup(card, rx_len, port);
1450         }
1451
1452         return 0;
1453 error:
1454         if (MP_RX_AGGR_IN_PROGRESS(card))
1455                 MP_RX_AGGR_BUF_RESET(card);
1456
1457         if (f_do_rx_cur && skb)
1458                 /* Single transfer pending. Free curr buff also */
1459                 dev_kfree_skb_any(skb);
1460
1461         return -1;
1462 }
1463
1464 /*
1465  * This function checks the current interrupt status.
1466  *
1467  * The following interrupts are checked and handled by this function -
1468  *      - Data sent
1469  *      - Command sent
1470  *      - Packets received
1471  *
1472  * Since the firmware does not generate download ready interrupt if the
1473  * port updated is command port only, command sent interrupt checking
1474  * should be done manually, and for every SDIO interrupt.
1475  *
1476  * In case of Rx packets received, the packets are uploaded from card to
1477  * host and processed accordingly.
1478  */
1479 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1480 {
1481         struct sdio_mmc_card *card = adapter->card;
1482         const struct mwifiex_sdio_card_reg *reg = card->reg;
1483         int ret = 0;
1484         u8 sdio_ireg;
1485         struct sk_buff *skb;
1486         u8 port = CTRL_PORT;
1487         u32 len_reg_l, len_reg_u;
1488         u32 rx_blocks;
1489         u16 rx_len;
1490         unsigned long flags;
1491         u32 bitmap;
1492         u8 cr;
1493
1494         spin_lock_irqsave(&adapter->int_lock, flags);
1495         sdio_ireg = adapter->int_status;
1496         adapter->int_status = 0;
1497         spin_unlock_irqrestore(&adapter->int_lock, flags);
1498
1499         if (!sdio_ireg)
1500                 return ret;
1501
1502         /* Following interrupt is only for SDIO new mode */
1503         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1504                 adapter->cmd_sent = false;
1505
1506         /* Following interrupt is only for SDIO new mode */
1507         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1508                 u32 pkt_type;
1509
1510                 /* read the len of control packet */
1511                 rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
1512                 rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
1513                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1514                 if (rx_len <= INTF_HEADER_LEN ||
1515                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1516                      MWIFIEX_RX_DATA_BUF_SIZE)
1517                         return -1;
1518                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1519                 mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n", rx_len);
1520
1521                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1522                 if (!skb)
1523                         return -1;
1524
1525                 skb_put(skb, rx_len);
1526
1527                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1528                                               skb->len, adapter->ioport |
1529                                                         CMD_PORT_SLCT)) {
1530                         mwifiex_dbg(adapter, ERROR,
1531                                     "%s: failed to card_to_host", __func__);
1532                         dev_kfree_skb_any(skb);
1533                         goto term_cmd;
1534                 }
1535
1536                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1537                     (pkt_type != MWIFIEX_TYPE_EVENT))
1538                         mwifiex_dbg(adapter, ERROR,
1539                                     "%s:Received wrong packet on cmd port",
1540                                     __func__);
1541
1542                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1543         }
1544
1545         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1546                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1547                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1548                 if (card->supports_sdio_new_mode) {
1549                         bitmap |=
1550                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1551                         bitmap |=
1552                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1553                 }
1554                 card->mp_wr_bitmap = bitmap;
1555
1556                 mwifiex_dbg(adapter, INTR,
1557                             "int: DNLD: wr_bitmap=0x%x\n",
1558                             card->mp_wr_bitmap);
1559                 if (adapter->data_sent &&
1560                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1561                         mwifiex_dbg(adapter, INTR,
1562                                     "info:  <--- Tx DONE Interrupt --->\n");
1563                         adapter->data_sent = false;
1564                 }
1565         }
1566
1567         /* As firmware will not generate download ready interrupt if the port
1568            updated is command port only, cmd_sent should be done for any SDIO
1569            interrupt. */
1570         if (card->has_control_mask && adapter->cmd_sent) {
1571                 /* Check if firmware has attach buffer at command port and
1572                    update just that in wr_bit_map. */
1573                 card->mp_wr_bitmap |=
1574                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1575                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1576                         adapter->cmd_sent = false;
1577         }
1578
1579         mwifiex_dbg(adapter, INTR, "info: cmd_sent=%d data_sent=%d\n",
1580                     adapter->cmd_sent, adapter->data_sent);
1581         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1582                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1583                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1584                 if (card->supports_sdio_new_mode) {
1585                         bitmap |=
1586                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1587                         bitmap |=
1588                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1589                 }
1590                 card->mp_rd_bitmap = bitmap;
1591                 mwifiex_dbg(adapter, INTR,
1592                             "int: UPLD: rd_bitmap=0x%x\n",
1593                             card->mp_rd_bitmap);
1594
1595                 while (true) {
1596                         ret = mwifiex_get_rd_port(adapter, &port);
1597                         if (ret) {
1598                                 mwifiex_dbg(adapter, INFO,
1599                                             "info: no more rd_port available\n");
1600                                 break;
1601                         }
1602                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1603                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1604                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1605                         rx_len |= (u16) card->mp_regs[len_reg_l];
1606                         mwifiex_dbg(adapter, INFO,
1607                                     "info: RX: port=%d rx_len=%u\n",
1608                                     port, rx_len);
1609                         rx_blocks =
1610                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1611                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1612                         if (rx_len <= INTF_HEADER_LEN ||
1613                             (card->mpa_rx.enabled &&
1614                              ((rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1615                               card->mpa_rx.buf_size))) {
1616                                 mwifiex_dbg(adapter, ERROR,
1617                                             "invalid rx_len=%d\n",
1618                                             rx_len);
1619                                 return -1;
1620                         }
1621
1622                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1623                         mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n",
1624                                     rx_len);
1625
1626                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, rx_len,
1627                                                               port)) {
1628                                 mwifiex_dbg(adapter, ERROR,
1629                                             "card_to_host_mpa failed: int status=%#x\n",
1630                                             sdio_ireg);
1631                                 goto term_cmd;
1632                         }
1633                 }
1634         }
1635
1636         return 0;
1637
1638 term_cmd:
1639         /* terminate cmd */
1640         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1641                 mwifiex_dbg(adapter, ERROR, "read CFG reg failed\n");
1642         else
1643                 mwifiex_dbg(adapter, INFO,
1644                             "info: CFG reg val = %d\n", cr);
1645
1646         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1647                 mwifiex_dbg(adapter, ERROR,
1648                             "write CFG reg failed\n");
1649         else
1650                 mwifiex_dbg(adapter, INFO, "info: write success\n");
1651
1652         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1653                 mwifiex_dbg(adapter, ERROR,
1654                             "read CFG reg failed\n");
1655         else
1656                 mwifiex_dbg(adapter, INFO,
1657                             "info: CFG reg val =%x\n", cr);
1658
1659         return -1;
1660 }
1661
1662 /*
1663  * This function aggregates transmission buffers in driver and downloads
1664  * the aggregated packet to card.
1665  *
1666  * The individual packets are aggregated by copying into an aggregation
1667  * buffer and then downloaded to the card. Previous unsent packets in the
1668  * aggregation buffer are pre-copied first before new packets are added.
1669  * Aggregation is done till there is space left in the aggregation buffer,
1670  * or till new packets are available.
1671  *
1672  * The function will only download the packet to the card when aggregation
1673  * stops, otherwise it will just aggregate the packet in aggregation buffer
1674  * and return.
1675  */
1676 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1677                                         u8 *payload, u32 pkt_len, u32 port,
1678                                         u32 next_pkt_len)
1679 {
1680         struct sdio_mmc_card *card = adapter->card;
1681         int ret = 0;
1682         s32 f_send_aggr_buf = 0;
1683         s32 f_send_cur_buf = 0;
1684         s32 f_precopy_cur_buf = 0;
1685         s32 f_postcopy_cur_buf = 0;
1686         u32 mport;
1687
1688         if (!card->mpa_tx.enabled ||
1689             (card->has_control_mask && (port == CTRL_PORT)) ||
1690             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1691                 mwifiex_dbg(adapter, WARN,
1692                             "info: %s: tx aggregation disabled\n",
1693                             __func__);
1694
1695                 f_send_cur_buf = 1;
1696                 goto tx_curr_single;
1697         }
1698
1699         if (next_pkt_len) {
1700                 /* More pkt in TX queue */
1701                 mwifiex_dbg(adapter, INFO,
1702                             "info: %s: more packets in queue.\n",
1703                             __func__);
1704
1705                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1706                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1707                                 f_precopy_cur_buf = 1;
1708
1709                                 if (!(card->mp_wr_bitmap &
1710                                       (1 << card->curr_wr_port)) ||
1711                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1712                                             card, pkt_len + next_pkt_len))
1713                                         f_send_aggr_buf = 1;
1714                         } else {
1715                                 /* No room in Aggr buf, send it */
1716                                 f_send_aggr_buf = 1;
1717
1718                                 if (!(card->mp_wr_bitmap &
1719                                       (1 << card->curr_wr_port)))
1720                                         f_send_cur_buf = 1;
1721                                 else
1722                                         f_postcopy_cur_buf = 1;
1723                         }
1724                 } else {
1725                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1726                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1727                                 f_precopy_cur_buf = 1;
1728                         else
1729                                 f_send_cur_buf = 1;
1730                 }
1731         } else {
1732                 /* Last pkt in TX queue */
1733                 mwifiex_dbg(adapter, INFO,
1734                             "info: %s: Last packet in Tx Queue.\n",
1735                             __func__);
1736
1737                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1738                         /* some packs in Aggr buf already */
1739                         f_send_aggr_buf = 1;
1740
1741                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1742                                 f_precopy_cur_buf = 1;
1743                         else
1744                                 /* No room in Aggr buf, send it */
1745                                 f_send_cur_buf = 1;
1746                 } else {
1747                         f_send_cur_buf = 1;
1748                 }
1749         }
1750
1751         if (f_precopy_cur_buf) {
1752                 mwifiex_dbg(adapter, DATA,
1753                             "data: %s: precopy current buffer\n",
1754                             __func__);
1755                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1756
1757                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1758                     mp_tx_aggr_port_limit_reached(card))
1759                         /* No more pkts allowed in Aggr buf, send it */
1760                         f_send_aggr_buf = 1;
1761         }
1762
1763         if (f_send_aggr_buf) {
1764                 mwifiex_dbg(adapter, DATA,
1765                             "data: %s: send aggr buffer: %d %d\n",
1766                             __func__, card->mpa_tx.start_port,
1767                             card->mpa_tx.ports);
1768                 if (card->supports_sdio_new_mode) {
1769                         u32 port_count;
1770                         int i;
1771
1772                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1773                                 if (card->mpa_tx.ports & BIT(i))
1774                                         port_count++;
1775
1776                         /* Writing data from "start_port + 0" to "start_port +
1777                          * port_count -1", so decrease the count by 1
1778                          */
1779                         port_count--;
1780                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1781                                  (port_count << 8)) + card->mpa_tx.start_port;
1782                 } else {
1783                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1784                                  (card->mpa_tx.ports << 4)) +
1785                                  card->mpa_tx.start_port;
1786                 }
1787
1788                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1789                                                  card->mpa_tx.buf_len, mport);
1790
1791                 MP_TX_AGGR_BUF_RESET(card);
1792         }
1793
1794 tx_curr_single:
1795         if (f_send_cur_buf) {
1796                 mwifiex_dbg(adapter, DATA,
1797                             "data: %s: send current buffer %d\n",
1798                             __func__, port);
1799                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1800                                                  adapter->ioport + port);
1801         }
1802
1803         if (f_postcopy_cur_buf) {
1804                 mwifiex_dbg(adapter, DATA,
1805                             "data: %s: postcopy current buffer\n",
1806                             __func__);
1807                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1808         }
1809
1810         return ret;
1811 }
1812
1813 /*
1814  * This function downloads data from driver to card.
1815  *
1816  * Both commands and data packets are transferred to the card by this
1817  * function.
1818  *
1819  * This function adds the SDIO specific header to the front of the buffer
1820  * before transferring. The header contains the length of the packet and
1821  * the type. The firmware handles the packets based upon this set type.
1822  */
1823 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1824                                      u8 type, struct sk_buff *skb,
1825                                      struct mwifiex_tx_param *tx_param)
1826 {
1827         struct sdio_mmc_card *card = adapter->card;
1828         int ret;
1829         u32 buf_block_len;
1830         u32 blk_size;
1831         u32 port = CTRL_PORT;
1832         u8 *payload = (u8 *)skb->data;
1833         u32 pkt_len = skb->len;
1834
1835         /* Allocate buffer and copy payload */
1836         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1837         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1838         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1839         *(__le16 *)&payload[2] = cpu_to_le16(type);
1840
1841         /*
1842          * This is SDIO specific header
1843          *  u16 length,
1844          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1845          *  MWIFIEX_TYPE_EVENT = 3)
1846          */
1847         if (type == MWIFIEX_TYPE_DATA) {
1848                 ret = mwifiex_get_wr_port_data(adapter, &port);
1849                 if (ret) {
1850                         mwifiex_dbg(adapter, ERROR,
1851                                     "%s: no wr_port available\n",
1852                                     __func__);
1853                         return ret;
1854                 }
1855         } else {
1856                 adapter->cmd_sent = true;
1857                 /* Type must be MWIFIEX_TYPE_CMD */
1858
1859                 if (pkt_len <= INTF_HEADER_LEN ||
1860                     pkt_len > MWIFIEX_UPLD_SIZE)
1861                         mwifiex_dbg(adapter, ERROR,
1862                                     "%s: payload=%p, nb=%d\n",
1863                                     __func__, payload, pkt_len);
1864
1865                 if (card->supports_sdio_new_mode)
1866                         port = CMD_PORT_SLCT;
1867         }
1868
1869         /* Transfer data to card */
1870         pkt_len = buf_block_len * blk_size;
1871
1872         if (tx_param)
1873                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1874                                                    port, tx_param->next_pkt_len
1875                                                    );
1876         else
1877                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1878                                                    port, 0);
1879
1880         if (ret) {
1881                 if (type == MWIFIEX_TYPE_CMD)
1882                         adapter->cmd_sent = false;
1883                 if (type == MWIFIEX_TYPE_DATA) {
1884                         adapter->data_sent = false;
1885                         /* restore curr_wr_port in error cases */
1886                         card->curr_wr_port = port;
1887                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1888                 }
1889         } else {
1890                 if (type == MWIFIEX_TYPE_DATA) {
1891                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1892                                 adapter->data_sent = true;
1893                         else
1894                                 adapter->data_sent = false;
1895                 }
1896         }
1897
1898         return ret;
1899 }
1900
1901 /*
1902  * This function allocates the MPA Tx and Rx buffers.
1903  */
1904 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1905                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1906 {
1907         struct sdio_mmc_card *card = adapter->card;
1908         u32 rx_buf_size;
1909         int ret = 0;
1910
1911         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1912         if (!card->mpa_tx.buf) {
1913                 ret = -1;
1914                 goto error;
1915         }
1916
1917         card->mpa_tx.buf_size = mpa_tx_buf_size;
1918
1919         rx_buf_size = max_t(u32, mpa_rx_buf_size,
1920                             (u32)SDIO_MAX_AGGR_BUF_SIZE);
1921         card->mpa_rx.buf = kzalloc(rx_buf_size, GFP_KERNEL);
1922         if (!card->mpa_rx.buf) {
1923                 ret = -1;
1924                 goto error;
1925         }
1926
1927         card->mpa_rx.buf_size = rx_buf_size;
1928
1929 error:
1930         if (ret) {
1931                 kfree(card->mpa_tx.buf);
1932                 kfree(card->mpa_rx.buf);
1933                 card->mpa_tx.buf_size = 0;
1934                 card->mpa_rx.buf_size = 0;
1935         }
1936
1937         return ret;
1938 }
1939
1940 /*
1941  * This function unregisters the SDIO device.
1942  *
1943  * The SDIO IRQ is released, the function is disabled and driver
1944  * data is set to null.
1945  */
1946 static void
1947 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1948 {
1949         struct sdio_mmc_card *card = adapter->card;
1950
1951         if (adapter->card) {
1952                 sdio_claim_host(card->func);
1953                 sdio_disable_func(card->func);
1954                 sdio_release_host(card->func);
1955         }
1956 }
1957
1958 /*
1959  * This function registers the SDIO device.
1960  *
1961  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1962  */
1963 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1964 {
1965         int ret;
1966         struct sdio_mmc_card *card = adapter->card;
1967         struct sdio_func *func = card->func;
1968
1969         /* save adapter pointer in card */
1970         card->adapter = adapter;
1971         adapter->tx_buf_size = card->tx_buf_size;
1972
1973         sdio_claim_host(func);
1974
1975         /* Set block size */
1976         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1977         sdio_release_host(func);
1978         if (ret) {
1979                 mwifiex_dbg(adapter, ERROR,
1980                             "cannot set SDIO block size\n");
1981                 return ret;
1982         }
1983
1984
1985         adapter->dev = &func->dev;
1986
1987         strcpy(adapter->fw_name, card->firmware);
1988         if (card->fw_dump_enh) {
1989                 adapter->mem_type_mapping_tbl = generic_mem_type_map;
1990                 adapter->num_mem_types = 1;
1991         } else {
1992                 adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1993                 adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1994         }
1995
1996         return 0;
1997 }
1998
1999 /*
2000  * This function initializes the SDIO driver.
2001  *
2002  * The following initializations steps are followed -
2003  *      - Read the Host interrupt status register to acknowledge
2004  *        the first interrupt got from bootloader
2005  *      - Disable host interrupt mask register
2006  *      - Get SDIO port
2007  *      - Initialize SDIO variables in card
2008  *      - Allocate MP registers
2009  *      - Allocate MPA Tx and Rx buffers
2010  */
2011 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
2012 {
2013         struct sdio_mmc_card *card = adapter->card;
2014         const struct mwifiex_sdio_card_reg *reg = card->reg;
2015         int ret;
2016         u8 sdio_ireg;
2017
2018         sdio_set_drvdata(card->func, card);
2019
2020         /*
2021          * Read the host_int_status_reg for ACK the first interrupt got
2022          * from the bootloader. If we don't do this we get a interrupt
2023          * as soon as we register the irq.
2024          */
2025         mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
2026
2027         /* Get SDIO ioport */
2028         mwifiex_init_sdio_ioport(adapter);
2029
2030         /* Initialize SDIO variables in card */
2031         card->mp_rd_bitmap = 0;
2032         card->mp_wr_bitmap = 0;
2033         card->curr_rd_port = reg->start_rd_port;
2034         card->curr_wr_port = reg->start_wr_port;
2035
2036         card->mp_data_port_mask = reg->data_port_mask;
2037
2038         card->mpa_tx.buf_len = 0;
2039         card->mpa_tx.pkt_cnt = 0;
2040         card->mpa_tx.start_port = 0;
2041
2042         card->mpa_tx.enabled = 1;
2043         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2044
2045         card->mpa_rx.buf_len = 0;
2046         card->mpa_rx.pkt_cnt = 0;
2047         card->mpa_rx.start_port = 0;
2048
2049         card->mpa_rx.enabled = 1;
2050         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2051
2052         /* Allocate buffers for SDIO MP-A */
2053         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
2054         if (!card->mp_regs)
2055                 return -ENOMEM;
2056
2057         /* Allocate skb pointer buffers */
2058         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
2059                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2060         if (!card->mpa_rx.skb_arr) {
2061                 kfree(card->mp_regs);
2062                 return -ENOMEM;
2063         }
2064
2065         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
2066                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2067         if (!card->mpa_rx.len_arr) {
2068                 kfree(card->mp_regs);
2069                 kfree(card->mpa_rx.skb_arr);
2070                 return -ENOMEM;
2071         }
2072
2073         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
2074                                              card->mp_tx_agg_buf_size,
2075                                              card->mp_rx_agg_buf_size);
2076
2077         /* Allocate 32k MPA Tx/Rx buffers if 64k memory allocation fails */
2078         if (ret && (card->mp_tx_agg_buf_size == MWIFIEX_MP_AGGR_BUF_SIZE_MAX ||
2079                     card->mp_rx_agg_buf_size == MWIFIEX_MP_AGGR_BUF_SIZE_MAX)) {
2080                 /* Disable rx single port aggregation */
2081                 adapter->host_disable_sdio_rx_aggr = true;
2082
2083                 ret = mwifiex_alloc_sdio_mpa_buffers
2084                         (adapter, MWIFIEX_MP_AGGR_BUF_SIZE_32K,
2085                          MWIFIEX_MP_AGGR_BUF_SIZE_32K);
2086                 if (ret) {
2087                         /* Disable multi port aggregation */
2088                         card->mpa_tx.enabled = 0;
2089                         card->mpa_rx.enabled = 0;
2090                 }
2091         }
2092
2093         adapter->auto_tdls = card->can_auto_tdls;
2094         adapter->ext_scan = card->can_ext_scan;
2095         return 0;
2096 }
2097
2098 /*
2099  * This function resets the MPA Tx and Rx buffers.
2100  */
2101 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
2102 {
2103         struct sdio_mmc_card *card = adapter->card;
2104
2105         MP_TX_AGGR_BUF_RESET(card);
2106         MP_RX_AGGR_BUF_RESET(card);
2107 }
2108
2109 /*
2110  * This function cleans up the allocated card buffers.
2111  *
2112  * The following are freed by this function -
2113  *      - MP registers
2114  *      - MPA Tx buffer
2115  *      - MPA Rx buffer
2116  */
2117 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
2118 {
2119         struct sdio_mmc_card *card = adapter->card;
2120
2121         kfree(card->mp_regs);
2122         kfree(card->mpa_rx.skb_arr);
2123         kfree(card->mpa_rx.len_arr);
2124         kfree(card->mpa_tx.buf);
2125         kfree(card->mpa_rx.buf);
2126         sdio_set_drvdata(card->func, NULL);
2127         kfree(card);
2128 }
2129
2130 /*
2131  * This function updates the MP end port in card.
2132  */
2133 static void
2134 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
2135 {
2136         struct sdio_mmc_card *card = adapter->card;
2137         const struct mwifiex_sdio_card_reg *reg = card->reg;
2138         int i;
2139
2140         card->mp_end_port = port;
2141
2142         card->mp_data_port_mask = reg->data_port_mask;
2143
2144         if (reg->start_wr_port) {
2145                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
2146                         card->mp_data_port_mask &=
2147                                         ~(1 << (card->max_ports - i));
2148         }
2149
2150         card->curr_wr_port = reg->start_wr_port;
2151
2152         mwifiex_dbg(adapter, CMD,
2153                     "cmd: mp_end_port %d, data port mask 0x%x\n",
2154                     port, card->mp_data_port_mask);
2155 }
2156
2157 static void mwifiex_recreate_adapter(struct sdio_mmc_card *card)
2158 {
2159         struct sdio_func *func = card->func;
2160         const struct sdio_device_id *device_id = card->device_id;
2161
2162         /* TODO mmc_hw_reset does not require destroying and re-probing the
2163          * whole adapter. Hence there was no need to for this rube-goldberg
2164          * design to reload the fw from an external workqueue. If we don't
2165          * destroy the adapter we could reload the fw from
2166          * mwifiex_main_work_queue directly.
2167          * The real difficulty with fw reset is to restore all the user
2168          * settings applied through ioctl. By destroying and recreating the
2169          * adapter, we take the easy way out, since we rely on user space to
2170          * restore them. We assume that user space will treat the new
2171          * incarnation of the adapter(interfaces) as if they had been just
2172          * discovered and initializes them from scratch.
2173          */
2174
2175         mwifiex_sdio_remove(func);
2176
2177         /* power cycle the adapter */
2178         sdio_claim_host(func);
2179         mmc_hw_reset(func->card->host);
2180         sdio_release_host(func);
2181
2182         mwifiex_sdio_probe(func, device_id);
2183 }
2184
2185 static struct mwifiex_adapter *save_adapter;
2186 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
2187 {
2188         struct sdio_mmc_card *card = adapter->card;
2189
2190         /* TODO card pointer is unprotected. If the adapter is removed
2191          * physically, sdio core might trigger mwifiex_sdio_remove, before this
2192          * workqueue is run, which will destroy the adapter struct. When this
2193          * workqueue eventually exceutes it will dereference an invalid adapter
2194          * pointer
2195          */
2196         mwifiex_recreate_adapter(card);
2197 }
2198
2199 /* This function read/write firmware */
2200 static enum
2201 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
2202                                        u8 doneflag)
2203 {
2204         struct sdio_mmc_card *card = adapter->card;
2205         int ret, tries;
2206         u8 ctrl_data = 0;
2207
2208         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2209                     card->reg->fw_dump_ctrl, &ret);
2210         if (ret) {
2211                 mwifiex_dbg(adapter, ERROR, "SDIO Write ERR\n");
2212                 return RDWR_STATUS_FAILURE;
2213         }
2214         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2215                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
2216                                        &ret);
2217                 if (ret) {
2218                         mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2219                         return RDWR_STATUS_FAILURE;
2220                 }
2221                 if (ctrl_data == FW_DUMP_DONE)
2222                         break;
2223                 if (doneflag && ctrl_data == doneflag)
2224                         return RDWR_STATUS_DONE;
2225                 if (ctrl_data != card->reg->fw_dump_host_ready) {
2226                         mwifiex_dbg(adapter, WARN,
2227                                     "The ctrl reg was changed, re-try again\n");
2228                         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2229                                     card->reg->fw_dump_ctrl, &ret);
2230                         if (ret) {
2231                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2232                                 return RDWR_STATUS_FAILURE;
2233                         }
2234                 }
2235                 usleep_range(100, 200);
2236         }
2237         if (ctrl_data == card->reg->fw_dump_host_ready) {
2238                 mwifiex_dbg(adapter, ERROR,
2239                             "Fail to pull ctrl_data\n");
2240                 return RDWR_STATUS_FAILURE;
2241         }
2242
2243         return RDWR_STATUS_SUCCESS;
2244 }
2245
2246 /* This function dump firmware memory to file */
2247 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2248 {
2249         struct sdio_mmc_card *card = adapter->card;
2250         int ret = 0;
2251         unsigned int reg, reg_start, reg_end;
2252         u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2253         enum rdwr_status stat;
2254         u32 memory_size;
2255
2256         if (!card->can_dump_fw)
2257                 return;
2258
2259         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2260                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2261
2262                 if (entry->mem_ptr) {
2263                         vfree(entry->mem_ptr);
2264                         entry->mem_ptr = NULL;
2265                 }
2266                 entry->mem_size = 0;
2267         }
2268
2269         mwifiex_pm_wakeup_card(adapter);
2270         sdio_claim_host(card->func);
2271
2272         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2273
2274         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2275         if (stat == RDWR_STATUS_FAILURE)
2276                 goto done;
2277
2278         reg = card->reg->fw_dump_start;
2279         /* Read the number of the memories which will dump */
2280         dump_num = sdio_readb(card->func, reg, &ret);
2281         if (ret) {
2282                 mwifiex_dbg(adapter, ERROR, "SDIO read memory length err\n");
2283                 goto done;
2284         }
2285
2286         /* Read the length of every memory which will dump */
2287         for (idx = 0; idx < dump_num; idx++) {
2288                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2289
2290                 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2291                 if (stat == RDWR_STATUS_FAILURE)
2292                         goto done;
2293
2294                 memory_size = 0;
2295                 reg = card->reg->fw_dump_start;
2296                 for (i = 0; i < 4; i++) {
2297                         read_reg = sdio_readb(card->func, reg, &ret);
2298                         if (ret) {
2299                                 mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2300                                 goto done;
2301                         }
2302                         memory_size |= (read_reg << i*8);
2303                         reg++;
2304                 }
2305
2306                 if (memory_size == 0) {
2307                         mwifiex_dbg(adapter, DUMP, "Firmware dump Finished!\n");
2308                         ret = mwifiex_write_reg(adapter,
2309                                                 card->reg->fw_dump_ctrl,
2310                                                 FW_DUMP_READ_DONE);
2311                         if (ret) {
2312                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2313                                 return;
2314                         }
2315                         break;
2316                 }
2317
2318                 mwifiex_dbg(adapter, DUMP,
2319                             "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2320                 entry->mem_ptr = vmalloc(memory_size + 1);
2321                 entry->mem_size = memory_size;
2322                 if (!entry->mem_ptr) {
2323                         mwifiex_dbg(adapter, ERROR, "Vmalloc %s failed\n",
2324                                     entry->mem_name);
2325                         goto done;
2326                 }
2327                 dbg_ptr = entry->mem_ptr;
2328                 end_ptr = dbg_ptr + memory_size;
2329
2330                 doneflag = entry->done_flag;
2331                 mwifiex_dbg(adapter, DUMP,
2332                             "Start %s output, please wait...\n",
2333                             entry->mem_name);
2334
2335                 do {
2336                         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2337                         if (stat == RDWR_STATUS_FAILURE)
2338                                 goto done;
2339
2340                         reg_start = card->reg->fw_dump_start;
2341                         reg_end = card->reg->fw_dump_end;
2342                         for (reg = reg_start; reg <= reg_end; reg++) {
2343                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2344                                 if (ret) {
2345                                         mwifiex_dbg(adapter, ERROR,
2346                                                     "SDIO read err\n");
2347                                         goto done;
2348                                 }
2349                                 if (dbg_ptr < end_ptr)
2350                                         dbg_ptr++;
2351                                 else
2352                                         mwifiex_dbg(adapter, ERROR,
2353                                                     "Allocated buf not enough\n");
2354                         }
2355
2356                         if (stat != RDWR_STATUS_DONE)
2357                                 continue;
2358
2359                         mwifiex_dbg(adapter, DUMP, "%s done: size=0x%tx\n",
2360                                     entry->mem_name, dbg_ptr - entry->mem_ptr);
2361                         break;
2362                 } while (1);
2363         }
2364         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2365
2366 done:
2367         sdio_release_host(card->func);
2368 }
2369
2370 static void mwifiex_sdio_generic_fw_dump(struct mwifiex_adapter *adapter)
2371 {
2372         struct sdio_mmc_card *card = adapter->card;
2373         struct memory_type_mapping *entry = &generic_mem_type_map[0];
2374         unsigned int reg, reg_start, reg_end;
2375         u8 start_flag = 0, done_flag = 0;
2376         u8 *dbg_ptr, *end_ptr;
2377         enum rdwr_status stat;
2378         int ret = -1, tries;
2379
2380         if (!card->fw_dump_enh)
2381                 return;
2382
2383         if (entry->mem_ptr) {
2384                 vfree(entry->mem_ptr);
2385                 entry->mem_ptr = NULL;
2386         }
2387         entry->mem_size = 0;
2388
2389         mwifiex_pm_wakeup_card(adapter);
2390         sdio_claim_host(card->func);
2391
2392         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2393
2394         stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2395         if (stat == RDWR_STATUS_FAILURE)
2396                 goto done;
2397
2398         reg_start = card->reg->fw_dump_start;
2399         reg_end = card->reg->fw_dump_end;
2400         for (reg = reg_start; reg <= reg_end; reg++) {
2401                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2402                         start_flag = sdio_readb(card->func, reg, &ret);
2403                         if (ret) {
2404                                 mwifiex_dbg(adapter, ERROR,
2405                                             "SDIO read err\n");
2406                                 goto done;
2407                         }
2408                         if (start_flag == 0)
2409                                 break;
2410                         if (tries == MAX_POLL_TRIES) {
2411                                 mwifiex_dbg(adapter, ERROR,
2412                                             "FW not ready to dump\n");
2413                                 ret = -1;
2414                                 goto done;
2415                         }
2416                 }
2417                 usleep_range(100, 200);
2418         }
2419
2420         entry->mem_ptr = vmalloc(0xf0000 + 1);
2421         if (!entry->mem_ptr) {
2422                 ret = -1;
2423                 goto done;
2424         }
2425         dbg_ptr = entry->mem_ptr;
2426         entry->mem_size = 0xf0000;
2427         end_ptr = dbg_ptr + entry->mem_size;
2428
2429         done_flag = entry->done_flag;
2430         mwifiex_dbg(adapter, DUMP,
2431                     "Start %s output, please wait...\n", entry->mem_name);
2432
2433         while (true) {
2434                 stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2435                 if (stat == RDWR_STATUS_FAILURE)
2436                         goto done;
2437                 for (reg = reg_start; reg <= reg_end; reg++) {
2438                         *dbg_ptr = sdio_readb(card->func, reg, &ret);
2439                         if (ret) {
2440                                 mwifiex_dbg(adapter, ERROR,
2441                                             "SDIO read err\n");
2442                                 goto done;
2443                         }
2444                         dbg_ptr++;
2445                         if (dbg_ptr >= end_ptr) {
2446                                 u8 *tmp_ptr;
2447
2448                                 tmp_ptr = vmalloc(entry->mem_size + 0x4000 + 1);
2449                                 if (!tmp_ptr)
2450                                         goto done;
2451
2452                                 memcpy(tmp_ptr, entry->mem_ptr,
2453                                        entry->mem_size);
2454                                 vfree(entry->mem_ptr);
2455                                 entry->mem_ptr = tmp_ptr;
2456                                 tmp_ptr = NULL;
2457                                 dbg_ptr = entry->mem_ptr + entry->mem_size;
2458                                 entry->mem_size += 0x4000;
2459                                 end_ptr = entry->mem_ptr + entry->mem_size;
2460                         }
2461                 }
2462                 if (stat == RDWR_STATUS_DONE) {
2463                         entry->mem_size = dbg_ptr - entry->mem_ptr;
2464                         mwifiex_dbg(adapter, DUMP, "dump %s done size=0x%x\n",
2465                                     entry->mem_name, entry->mem_size);
2466                         ret = 0;
2467                         break;
2468                 }
2469         }
2470         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2471
2472 done:
2473         if (ret) {
2474                 mwifiex_dbg(adapter, ERROR, "firmware dump failed\n");
2475                 if (entry->mem_ptr) {
2476                         vfree(entry->mem_ptr);
2477                         entry->mem_ptr = NULL;
2478                 }
2479                 entry->mem_size = 0;
2480         }
2481         sdio_release_host(card->func);
2482 }
2483
2484 static void mwifiex_sdio_device_dump_work(struct mwifiex_adapter *adapter)
2485 {
2486         struct sdio_mmc_card *card = adapter->card;
2487
2488         mwifiex_drv_info_dump(adapter);
2489         if (card->fw_dump_enh)
2490                 mwifiex_sdio_generic_fw_dump(adapter);
2491         else
2492                 mwifiex_sdio_fw_dump(adapter);
2493         mwifiex_upload_device_dump(adapter);
2494 }
2495
2496 static void mwifiex_sdio_work(struct work_struct *work)
2497 {
2498         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP,
2499                                &iface_work_flags))
2500                 mwifiex_sdio_device_dump_work(save_adapter);
2501         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2502                                &iface_work_flags))
2503                 mwifiex_sdio_card_reset_work(save_adapter);
2504 }
2505
2506 static DECLARE_WORK(sdio_work, mwifiex_sdio_work);
2507 /* This function resets the card */
2508 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2509 {
2510         save_adapter = adapter;
2511         if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags))
2512                 return;
2513
2514         set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);
2515
2516         schedule_work(&sdio_work);
2517 }
2518
2519 /* This function dumps FW information */
2520 static void mwifiex_sdio_device_dump(struct mwifiex_adapter *adapter)
2521 {
2522         save_adapter = adapter;
2523         if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags))
2524                 return;
2525
2526         set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags);
2527         schedule_work(&sdio_work);
2528 }
2529
2530 /* Function to dump SDIO function registers and SDIO scratch registers in case
2531  * of FW crash
2532  */
2533 static int
2534 mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
2535 {
2536         char *p = drv_buf;
2537         struct sdio_mmc_card *cardp = adapter->card;
2538         int ret = 0;
2539         u8 count, func, data, index = 0, size = 0;
2540         u8 reg, reg_start, reg_end;
2541         char buf[256], *ptr;
2542
2543         if (!p)
2544                 return 0;
2545
2546         mwifiex_dbg(adapter, MSG, "SDIO register dump start\n");
2547
2548         mwifiex_pm_wakeup_card(adapter);
2549
2550         sdio_claim_host(cardp->func);
2551
2552         for (count = 0; count < 5; count++) {
2553                 memset(buf, 0, sizeof(buf));
2554                 ptr = buf;
2555
2556                 switch (count) {
2557                 case 0:
2558                         /* Read the registers of SDIO function0 */
2559                         func = count;
2560                         reg_start = 0;
2561                         reg_end = 9;
2562                         break;
2563                 case 1:
2564                         /* Read the registers of SDIO function1 */
2565                         func = count;
2566                         reg_start = cardp->reg->func1_dump_reg_start;
2567                         reg_end = cardp->reg->func1_dump_reg_end;
2568                         break;
2569                 case 2:
2570                         index = 0;
2571                         func = 1;
2572                         reg_start = cardp->reg->func1_spec_reg_table[index++];
2573                         size = cardp->reg->func1_spec_reg_num;
2574                         reg_end = cardp->reg->func1_spec_reg_table[size-1];
2575                         break;
2576                 default:
2577                         /* Read the scratch registers of SDIO function1 */
2578                         if (count == 4)
2579                                 mdelay(100);
2580                         func = 1;
2581                         reg_start = cardp->reg->func1_scratch_reg;
2582                         reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
2583                 }
2584
2585                 if (count != 2)
2586                         ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
2587                                        func, reg_start, reg_end);
2588                 else
2589                         ptr += sprintf(ptr, "SDIO Func%d: ", func);
2590
2591                 for (reg = reg_start; reg <= reg_end;) {
2592                         if (func == 0)
2593                                 data = sdio_f0_readb(cardp->func, reg, &ret);
2594                         else
2595                                 data = sdio_readb(cardp->func, reg, &ret);
2596
2597                         if (count == 2)
2598                                 ptr += sprintf(ptr, "(%#x) ", reg);
2599                         if (!ret) {
2600                                 ptr += sprintf(ptr, "%02x ", data);
2601                         } else {
2602                                 ptr += sprintf(ptr, "ERR");
2603                                 break;
2604                         }
2605
2606                         if (count == 2 && reg < reg_end)
2607                                 reg = cardp->reg->func1_spec_reg_table[index++];
2608                         else
2609                                 reg++;
2610                 }
2611
2612                 mwifiex_dbg(adapter, MSG, "%s\n", buf);
2613                 p += sprintf(p, "%s\n", buf);
2614         }
2615
2616         sdio_release_host(cardp->func);
2617
2618         mwifiex_dbg(adapter, MSG, "SDIO register dump end\n");
2619
2620         return p - drv_buf;
2621 }
2622
2623 static struct mwifiex_if_ops sdio_ops = {
2624         .init_if = mwifiex_init_sdio,
2625         .cleanup_if = mwifiex_cleanup_sdio,
2626         .check_fw_status = mwifiex_check_fw_status,
2627         .check_winner_status = mwifiex_check_winner_status,
2628         .prog_fw = mwifiex_prog_fw_w_helper,
2629         .register_dev = mwifiex_register_dev,
2630         .unregister_dev = mwifiex_unregister_dev,
2631         .enable_int = mwifiex_sdio_enable_host_int,
2632         .disable_int = mwifiex_sdio_disable_host_int,
2633         .process_int_status = mwifiex_process_int_status,
2634         .host_to_card = mwifiex_sdio_host_to_card,
2635         .wakeup = mwifiex_pm_wakeup_card,
2636         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2637
2638         /* SDIO specific */
2639         .update_mp_end_port = mwifiex_update_mp_end_port,
2640         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2641         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2642         .event_complete = mwifiex_sdio_event_complete,
2643         .card_reset = mwifiex_sdio_card_reset,
2644         .reg_dump = mwifiex_sdio_reg_dump,
2645         .device_dump = mwifiex_sdio_device_dump,
2646         .deaggr_pkt = mwifiex_deaggr_sdio_pkt,
2647 };
2648
2649 /*
2650  * This function initializes the SDIO driver.
2651  *
2652  * This initiates the semaphore and registers the device with
2653  * SDIO bus.
2654  */
2655 static int
2656 mwifiex_sdio_init_module(void)
2657 {
2658         sema_init(&add_remove_card_sem, 1);
2659
2660         /* Clear the flag in case user removes the card. */
2661         user_rmmod = 0;
2662
2663         return sdio_register_driver(&mwifiex_sdio);
2664 }
2665
2666 /*
2667  * This function cleans up the SDIO driver.
2668  *
2669  * The following major steps are followed for cleanup -
2670  *      - Resume the device if its suspended
2671  *      - Disconnect the device if connected
2672  *      - Shutdown the firmware
2673  *      - Unregister the device from SDIO bus.
2674  */
2675 static void
2676 mwifiex_sdio_cleanup_module(void)
2677 {
2678         if (!down_interruptible(&add_remove_card_sem))
2679                 up(&add_remove_card_sem);
2680
2681         /* Set the flag as user is removing this module. */
2682         user_rmmod = 1;
2683         cancel_work_sync(&sdio_work);
2684
2685         sdio_unregister_driver(&mwifiex_sdio);
2686 }
2687
2688 module_init(mwifiex_sdio_init_module);
2689 module_exit(mwifiex_sdio_cleanup_module);
2690
2691 MODULE_AUTHOR("Marvell International Ltd.");
2692 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2693 MODULE_VERSION(SDIO_VERSION);
2694 MODULE_LICENSE("GPL v2");
2695 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2696 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2697 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2698 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2699 MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);
2700 MODULE_FIRMWARE(SD8997_DEFAULT_FW_NAME);