drivers/net/wireless/mwifiex/sdio.c

   1 /*
   2  * Marvell Wireless LAN device driver: SDIO specific handling
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include <linux/firmware.h>
  21
  22 #include "decl.h"
  23 #include "ioctl.h"
  24 #include "util.h"
  25 #include "fw.h"
  26 #include "main.h"
  27 #include "wmm.h"
  28 #include "11n.h"
  29 #include "sdio.h"
  30
  31
  32 #define SDIO_VERSION    "1.0"
  33
  34 /* The mwifiex_sdio_remove() callback function is called when
  35  * user removes this module from kernel space or ejects
  36  * the card from the slot. The driver handles these 2 cases
  37  * differently.
  38  * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
  39  * HS_CANCEL etc.) are sent to the firmware.
  40  * If the card is removed, there is no need to send these command.
  41  *
  42  * The variable 'user_rmmod' is used to distinguish these two
  43  * scenarios. This flag is initialized as FALSE in case the card
  44  * is removed, and will be set to TRUE for module removal when
  45  * module_exit function is called.
  46  */
  47 static u8 user_rmmod;
  48
  49 static struct mwifiex_if_ops sdio_ops;
  50
  51 static struct semaphore add_remove_card_sem;
  52
  53 static struct memory_type_mapping mem_type_mapping_tbl[] = {
  54         {"ITCM", NULL, 0, 0xF0},
  55         {"DTCM", NULL, 0, 0xF1},
  56         {"SQRAM", NULL, 0, 0xF2},
  57         {"APU", NULL, 0, 0xF3},
  58         {"CIU", NULL, 0, 0xF4},
  59         {"ICU", NULL, 0, 0xF5},
  60         {"MAC", NULL, 0, 0xF6},
  61         {"EXT7", NULL, 0, 0xF7},
  62         {"EXT8", NULL, 0, 0xF8},
  63         {"EXT9", NULL, 0, 0xF9},
  64         {"EXT10", NULL, 0, 0xFA},
  65         {"EXT11", NULL, 0, 0xFB},
  66         {"EXT12", NULL, 0, 0xFC},
  67         {"EXT13", NULL, 0, 0xFD},
  68         {"EXTLAST", NULL, 0, 0xFE},
  69 };
  70
  71 /*
  72  * SDIO probe.
  73  *
  74  * This function probes an mwifiex device and registers it. It allocates
  75  * the card structure, enables SDIO function number and initiates the
  76  * device registration and initialization procedure by adding a logical
  77  * interface.
  78  */
  79 static int
  80 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
  81 {
  82         int ret;
  83         struct sdio_mmc_card *card = NULL;
  84
  85         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
  86                  func->vendor, func->device, func->class, func->num);
  87
  88         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
  89         if (!card)
  90                 return -ENOMEM;
  91
  92         card->func = func;
  93
  94         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
  95
  96         if (id->driver_data) {
  97                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
  98
  99                 card->firmware = data->firmware;
 100                 card->reg = data->reg;
 101                 card->max_ports = data->max_ports;
 102                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
 103                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
 104                 card->has_control_mask = data->has_control_mask;
 105                 card->tx_buf_size = data->tx_buf_size;
 106                 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
 107                 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
 108                 card->supports_fw_dump = data->supports_fw_dump;
 109         }
 110
 111         sdio_claim_host(func);
 112         ret = sdio_enable_func(func);
 113         sdio_release_host(func);
 114
 115         if (ret) {
 116                 pr_err("%s: failed to enable function\n", __func__);
 117                 kfree(card);
 118                 return -EIO;
 119         }
 120
 121         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
 122                              MWIFIEX_SDIO)) {
 123                 pr_err("%s: add card failed\n", __func__);
 124                 kfree(card);
 125                 sdio_claim_host(func);
 126                 ret = sdio_disable_func(func);
 127                 sdio_release_host(func);
 128                 ret = -1;
 129         }
 130
 131         return ret;
 132 }
 133
 134 /*
 135  * SDIO resume.
 136  *
 137  * Kernel needs to suspend all functions separately. Therefore all
 138  * registered functions must have drivers with suspend and resume
 139  * methods. Failing that the kernel simply removes the whole card.
 140  *
 141  * If already not resumed, this function turns on the traffic and
 142  * sends a host sleep cancel request to the firmware.
 143  */
 144 static int mwifiex_sdio_resume(struct device *dev)
 145 {
 146         struct sdio_func *func = dev_to_sdio_func(dev);
 147         struct sdio_mmc_card *card;
 148         struct mwifiex_adapter *adapter;
 149         mmc_pm_flag_t pm_flag = 0;
 150
 151         if (func) {
 152                 pm_flag = sdio_get_host_pm_caps(func);
 153                 card = sdio_get_drvdata(func);
 154                 if (!card || !card->adapter) {
 155                         pr_err("resume: invalid card or adapter\n");
 156                         return 0;
 157                 }
 158         } else {
 159                 pr_err("resume: sdio_func is not specified\n");
 160                 return 0;
 161         }
 162
 163         adapter = card->adapter;
 164
 165         if (!adapter->is_suspended) {
 166                 dev_warn(adapter->dev, "device already resumed\n");
 167                 return 0;
 168         }
 169
 170         adapter->is_suspended = false;
 171
 172         /* Disable Host Sleep */
 173         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
 174                           MWIFIEX_ASYNC_CMD);
 175
 176         return 0;
 177 }
 178
 179 /*
 180  * SDIO remove.
 181  *
 182  * This function removes the interface and frees up the card structure.
 183  */
 184 static void
 185 mwifiex_sdio_remove(struct sdio_func *func)
 186 {
 187         struct sdio_mmc_card *card;
 188         struct mwifiex_adapter *adapter;
 189         struct mwifiex_private *priv;
 190
 191         pr_debug("info: SDIO func num=%d\n", func->num);
 192
 193         card = sdio_get_drvdata(func);
 194         if (!card)
 195                 return;
 196
 197         adapter = card->adapter;
 198         if (!adapter || !adapter->priv_num)
 199                 return;
 200
 201         cancel_work_sync(&adapter->iface_work);
 202
 203         if (user_rmmod) {
 204                 if (adapter->is_suspended)
 205                         mwifiex_sdio_resume(adapter->dev);
 206
 207                 mwifiex_deauthenticate_all(adapter);
 208
 209                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
 210                 mwifiex_disable_auto_ds(priv);
 211                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
 212         }
 213
 214         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
 215 }
 216
 217 /*
 218  * SDIO suspend.
 219  *
 220  * Kernel needs to suspend all functions separately. Therefore all
 221  * registered functions must have drivers with suspend and resume
 222  * methods. Failing that the kernel simply removes the whole card.
 223  *
 224  * If already not suspended, this function allocates and sends a host
 225  * sleep activate request to the firmware and turns off the traffic.
 226  */
 227 static int mwifiex_sdio_suspend(struct device *dev)
 228 {
 229         struct sdio_func *func = dev_to_sdio_func(dev);
 230         struct sdio_mmc_card *card;
 231         struct mwifiex_adapter *adapter;
 232         mmc_pm_flag_t pm_flag = 0;
 233         int ret = 0;
 234
 235         if (func) {
 236                 pm_flag = sdio_get_host_pm_caps(func);
 237                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
 238                          sdio_func_id(func), pm_flag);
 239                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
 240                         pr_err("%s: cannot remain alive while host is"
 241                                 " suspended\n", sdio_func_id(func));
 242                         return -ENOSYS;
 243                 }
 244
 245                 card = sdio_get_drvdata(func);
 246                 if (!card || !card->adapter) {
 247                         pr_err("suspend: invalid card or adapter\n");
 248                         return 0;
 249                 }
 250         } else {
 251                 pr_err("suspend: sdio_func is not specified\n");
 252                 return 0;
 253         }
 254
 255         adapter = card->adapter;
 256
 257         /* Enable the Host Sleep */
 258         if (!mwifiex_enable_hs(adapter)) {
 259                 dev_err(adapter->dev, "cmd: failed to suspend\n");
 260                 adapter->hs_enabling = false;
 261                 return -EFAULT;
 262         }
 263
 264         dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
 265         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
 266
 267         /* Indicate device suspended */
 268         adapter->is_suspended = true;
 269         adapter->hs_enabling = false;
 270
 271         return ret;
 272 }
 273
 274 /* Device ID for SD8786 */
 275 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
 276 /* Device ID for SD8787 */
 277 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
 278 /* Device ID for SD8797 */
 279 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
 280 /* Device ID for SD8897 */
 281 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
 282
 283 /* WLAN IDs */
 284 static const struct sdio_device_id mwifiex_ids[] = {
 285         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
 286                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
 287         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
 288                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
 289         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
 290                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
 291         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
 292                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
 293         {},
 294 };
 295
 296 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
 297
 298 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
 299         .suspend = mwifiex_sdio_suspend,
 300         .resume = mwifiex_sdio_resume,
 301 };
 302
 303 static struct sdio_driver mwifiex_sdio = {
 304         .name = "mwifiex_sdio",
 305         .id_table = mwifiex_ids,
 306         .probe = mwifiex_sdio_probe,
 307         .remove = mwifiex_sdio_remove,
 308         .drv = {
 309                 .owner = THIS_MODULE,
 310                 .pm = &mwifiex_sdio_pm_ops,
 311         }
 312 };
 313
 314 /* Write data into SDIO card register. Caller claims SDIO device. */
 315 static int
 316 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
 317 {
 318         int ret = -1;
 319         sdio_writeb(func, data, reg, &ret);
 320         return ret;
 321 }
 322
 323 /*
 324  * This function writes data into SDIO card register.
 325  */
 326 static int
 327 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
 328 {
 329         struct sdio_mmc_card *card = adapter->card;
 330         int ret;
 331
 332         sdio_claim_host(card->func);
 333         ret = mwifiex_write_reg_locked(card->func, reg, data);
 334         sdio_release_host(card->func);
 335
 336         return ret;
 337 }
 338
 339 /*
 340  * This function reads data from SDIO card register.
 341  */
 342 static int
 343 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
 344 {
 345         struct sdio_mmc_card *card = adapter->card;
 346         int ret = -1;
 347         u8 val;
 348
 349         sdio_claim_host(card->func);
 350         val = sdio_readb(card->func, reg, &ret);
 351         sdio_release_host(card->func);
 352
 353         *data = val;
 354
 355         return ret;
 356 }
 357
 358 /*
 359  * This function writes multiple data into SDIO card memory.
 360  *
 361  * This does not work in suspended mode.
 362  */
 363 static int
 364 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
 365                         u8 *buffer, u32 pkt_len, u32 port)
 366 {
 367         struct sdio_mmc_card *card = adapter->card;
 368         int ret;
 369         u8 blk_mode =
 370                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
 371         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 372         u32 blk_cnt =
 373                 (blk_mode ==
 374                  BLOCK_MODE) ? (pkt_len /
 375                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
 376         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 377
 378         if (adapter->is_suspended) {
 379                 dev_err(adapter->dev,
 380                         "%s: not allowed while suspended\n", __func__);
 381                 return -1;
 382         }
 383
 384         sdio_claim_host(card->func);
 385
 386         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
 387
 388         sdio_release_host(card->func);
 389
 390         return ret;
 391 }
 392
 393 /*
 394  * This function reads multiple data from SDIO card memory.
 395  */
 396 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
 397                                   u32 len, u32 port, u8 claim)
 398 {
 399         struct sdio_mmc_card *card = adapter->card;
 400         int ret;
 401         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
 402                        : BLOCK_MODE;
 403         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
 404         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
 405                         : len;
 406         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
 407
 408         if (claim)
 409                 sdio_claim_host(card->func);
 410
 411         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
 412
 413         if (claim)
 414                 sdio_release_host(card->func);
 415
 416         return ret;
 417 }
 418
 419 /*
 420  * This function wakes up the card.
 421  *
 422  * A host power up command is written to the card configuration
 423  * register to wake up the card.
 424  */
 425 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
 426 {
 427         dev_dbg(adapter->dev, "event: wakeup device...\n");
 428
 429         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
 430 }
 431
 432 /*
 433  * This function is called after the card has woken up.
 434  *
 435  * The card configuration register is reset.
 436  */
 437 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
 438 {
 439         dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
 440
 441         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
 442 }
 443
 444 /*
 445  * This function is used to initialize IO ports for the
 446  * chipsets supporting SDIO new mode eg SD8897.
 447  */
 448 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
 449 {
 450         u8 reg;
 451
 452         adapter->ioport = MEM_PORT;
 453
 454         /* enable sdio new mode */
 455         if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
 456                 return -1;
 457         if (mwifiex_write_reg(adapter, CARD_CONFIG_2_1_REG,
 458                               reg | CMD53_NEW_MODE))
 459                 return -1;
 460
 461         /* Configure cmd port and enable reading rx length from the register */
 462         if (mwifiex_read_reg(adapter, CMD_CONFIG_0, &reg))
 463                 return -1;
 464         if (mwifiex_write_reg(adapter, CMD_CONFIG_0, reg | CMD_PORT_RD_LEN_EN))
 465                 return -1;
 466
 467         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
 468          * completed
 469          */
 470         if (mwifiex_read_reg(adapter, CMD_CONFIG_1, &reg))
 471                 return -1;
 472         if (mwifiex_write_reg(adapter, CMD_CONFIG_1, reg | CMD_PORT_AUTO_EN))
 473                 return -1;
 474
 475         return 0;
 476 }
 477
 478 /* This function initializes the IO ports.
 479  *
 480  * The following operations are performed -
 481  *      - Read the IO ports (0, 1 and 2)
 482  *      - Set host interrupt Reset-To-Read to clear
 483  *      - Set auto re-enable interrupt
 484  */
 485 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
 486 {
 487         u8 reg;
 488         struct sdio_mmc_card *card = adapter->card;
 489
 490         adapter->ioport = 0;
 491
 492         if (card->supports_sdio_new_mode) {
 493                 if (mwifiex_init_sdio_new_mode(adapter))
 494                         return -1;
 495                 goto cont;
 496         }
 497
 498         /* Read the IO port */
 499         if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
 500                 adapter->ioport |= (reg & 0xff);
 501         else
 502                 return -1;
 503
 504         if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
 505                 adapter->ioport |= ((reg & 0xff) << 8);
 506         else
 507                 return -1;
 508
 509         if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
 510                 adapter->ioport |= ((reg & 0xff) << 16);
 511         else
 512                 return -1;
 513 cont:
 514         pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
 515
 516         /* Set Host interrupt reset to read to clear */
 517         if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
 518                 mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
 519                                   reg | card->reg->sdio_int_mask);
 520         else
 521                 return -1;
 522
 523         /* Dnld/Upld ready set to auto reset */
 524         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
 525                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
 526                                   reg | AUTO_RE_ENABLE_INT);
 527         else
 528                 return -1;
 529
 530         return 0;
 531 }
 532
 533 /*
 534  * This function sends data to the card.
 535  */
 536 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
 537                                       u8 *payload, u32 pkt_len, u32 port)
 538 {
 539         u32 i = 0;
 540         int ret;
 541
 542         do {
 543                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
 544                 if (ret) {
 545                         i++;
 546                         dev_err(adapter->dev, "host_to_card, write iomem"
 547                                         " (%d) failed: %d\n", i, ret);
 548                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
 549                                 dev_err(adapter->dev, "write CFG reg failed\n");
 550
 551                         ret = -1;
 552                         if (i > MAX_WRITE_IOMEM_RETRY)
 553                                 return ret;
 554                 }
 555         } while (ret == -1);
 556
 557         return ret;
 558 }
 559
 560 /*
 561  * This function gets the read port.
 562  *
 563  * If control port bit is set in MP read bitmap, the control port
 564  * is returned, otherwise the current read port is returned and
 565  * the value is increased (provided it does not reach the maximum
 566  * limit, in which case it is reset to 1)
 567  */
 568 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
 569 {
 570         struct sdio_mmc_card *card = adapter->card;
 571         const struct mwifiex_sdio_card_reg *reg = card->reg;
 572         u32 rd_bitmap = card->mp_rd_bitmap;
 573
 574         dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
 575
 576         if (card->supports_sdio_new_mode) {
 577                 if (!(rd_bitmap & reg->data_port_mask))
 578                         return -1;
 579         } else {
 580                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
 581                         return -1;
 582         }
 583
 584         if ((card->has_control_mask) &&
 585             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
 586                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
 587                 *port = CTRL_PORT;
 588                 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
 589                         *port, card->mp_rd_bitmap);
 590                 return 0;
 591         }
 592
 593         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
 594                 return -1;
 595
 596         /* We are now handling the SDIO data ports */
 597         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
 598         *port = card->curr_rd_port;
 599
 600         if (++card->curr_rd_port == card->max_ports)
 601                 card->curr_rd_port = reg->start_rd_port;
 602
 603         dev_dbg(adapter->dev,
 604                 "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
 605                 *port, rd_bitmap, card->mp_rd_bitmap);
 606
 607         return 0;
 608 }
 609
 610 /*
 611  * This function gets the write port for data.
 612  *
 613  * The current write port is returned if available and the value is
 614  * increased (provided it does not reach the maximum limit, in which
 615  * case it is reset to 1)
 616  */
 617 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
 618 {
 619         struct sdio_mmc_card *card = adapter->card;
 620         const struct mwifiex_sdio_card_reg *reg = card->reg;
 621         u32 wr_bitmap = card->mp_wr_bitmap;
 622
 623         dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
 624
 625         if (card->supports_sdio_new_mode &&
 626             !(wr_bitmap & reg->data_port_mask)) {
 627                 adapter->data_sent = true;
 628                 return -EBUSY;
 629         } else if (!card->supports_sdio_new_mode &&
 630                    !(wr_bitmap & card->mp_data_port_mask)) {
 631                 return -1;
 632         }
 633
 634         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
 635                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
 636                 *port = card->curr_wr_port;
 637                 if (((card->supports_sdio_new_mode) &&
 638                      (++card->curr_wr_port == card->max_ports)) ||
 639                     ((!card->supports_sdio_new_mode) &&
 640                      (++card->curr_wr_port == card->mp_end_port)))
 641                         card->curr_wr_port = reg->start_wr_port;
 642         } else {
 643                 adapter->data_sent = true;
 644                 return -EBUSY;
 645         }
 646
 647         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
 648                 dev_err(adapter->dev,
 649                         "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 650                         *port, card->curr_wr_port, wr_bitmap,
 651                         card->mp_wr_bitmap);
 652                 return -1;
 653         }
 654
 655         dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
 656                 *port, wr_bitmap, card->mp_wr_bitmap);
 657
 658         return 0;
 659 }
 660
 661 /*
 662  * This function polls the card status.
 663  */
 664 static int
 665 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
 666 {
 667         struct sdio_mmc_card *card = adapter->card;
 668         u32 tries;
 669         u8 cs;
 670
 671         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 672                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
 673                         break;
 674                 else if ((cs & bits) == bits)
 675                         return 0;
 676
 677                 usleep_range(10, 20);
 678         }
 679
 680         dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
 681
 682         return -1;
 683 }
 684
 685 /*
 686  * This function reads the firmware status.
 687  */
 688 static int
 689 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
 690 {
 691         struct sdio_mmc_card *card = adapter->card;
 692         const struct mwifiex_sdio_card_reg *reg = card->reg;
 693         u8 fws0, fws1;
 694
 695         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
 696                 return -1;
 697
 698         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
 699                 return -1;
 700
 701         *dat = (u16) ((fws1 << 8) | fws0);
 702
 703         return 0;
 704 }
 705
 706 /*
 707  * This function disables the host interrupt.
 708  *
 709  * The host interrupt mask is read, the disable bit is reset and
 710  * written back to the card host interrupt mask register.
 711  */
 712 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
 713 {
 714         struct sdio_mmc_card *card = adapter->card;
 715         struct sdio_func *func = card->func;
 716
 717         sdio_claim_host(func);
 718         mwifiex_write_reg_locked(func, HOST_INT_MASK_REG, 0);
 719         sdio_release_irq(func);
 720         sdio_release_host(func);
 721 }
 722
 723 /*
 724  * This function reads the interrupt status from card.
 725  */
 726 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
 727 {
 728         struct sdio_mmc_card *card = adapter->card;
 729         u8 sdio_ireg;
 730         unsigned long flags;
 731
 732         if (mwifiex_read_data_sync(adapter, card->mp_regs,
 733                                    card->reg->max_mp_regs,
 734                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
 735                 dev_err(adapter->dev, "read mp_regs failed\n");
 736                 return;
 737         }
 738
 739         sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
 740         if (sdio_ireg) {
 741                 /*
 742                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 743                  * For SDIO new mode CMD port interrupts
 744                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
 745                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
 746                  * Clear the interrupt status register
 747                  */
 748                 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
 749                 spin_lock_irqsave(&adapter->int_lock, flags);
 750                 adapter->int_status |= sdio_ireg;
 751                 spin_unlock_irqrestore(&adapter->int_lock, flags);
 752         }
 753 }
 754
 755 /*
 756  * SDIO interrupt handler.
 757  *
 758  * This function reads the interrupt status from firmware and handles
 759  * the interrupt in current thread (ksdioirqd) right away.
 760  */
 761 static void
 762 mwifiex_sdio_interrupt(struct sdio_func *func)
 763 {
 764         struct mwifiex_adapter *adapter;
 765         struct sdio_mmc_card *card;
 766
 767         card = sdio_get_drvdata(func);
 768         if (!card || !card->adapter) {
 769                 pr_debug("int: func=%p card=%p adapter=%p\n",
 770                          func, card, card ? card->adapter : NULL);
 771                 return;
 772         }
 773         adapter = card->adapter;
 774
 775         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
 776                 adapter->ps_state = PS_STATE_AWAKE;
 777
 778         mwifiex_interrupt_status(adapter);
 779         mwifiex_main_process(adapter);
 780 }
 781
 782 /*
 783  * This function enables the host interrupt.
 784  *
 785  * The host interrupt enable mask is written to the card
 786  * host interrupt mask register.
 787  */
 788 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
 789 {
 790         struct sdio_mmc_card *card = adapter->card;
 791         struct sdio_func *func = card->func;
 792         int ret;
 793
 794         sdio_claim_host(func);
 795
 796         /* Request the SDIO IRQ */
 797         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
 798         if (ret) {
 799                 dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
 800                 goto out;
 801         }
 802
 803         /* Simply write the mask to the register */
 804         ret = mwifiex_write_reg_locked(func, HOST_INT_MASK_REG,
 805                                        card->reg->host_int_enable);
 806         if (ret) {
 807                 dev_err(adapter->dev, "enable host interrupt failed\n");
 808                 sdio_release_irq(func);
 809         }
 810
 811 out:
 812         sdio_release_host(func);
 813         return ret;
 814 }
 815
 816 /*
 817  * This function sends a data buffer to the card.
 818  */
 819 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
 820                                      u32 *type, u8 *buffer,
 821                                      u32 npayload, u32 ioport)
 822 {
 823         int ret;
 824         u32 nb;
 825
 826         if (!buffer) {
 827                 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
 828                 return -1;
 829         }
 830
 831         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
 832
 833         if (ret) {
 834                 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
 835                         ret);
 836                 return -1;
 837         }
 838
 839         nb = le16_to_cpu(*(__le16 *) (buffer));
 840         if (nb > npayload) {
 841                 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
 842                         __func__, nb, npayload);
 843                 return -1;
 844         }
 845
 846         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
 847
 848         return ret;
 849 }
 850
 851 /*
 852  * This function downloads the firmware to the card.
 853  *
 854  * Firmware is downloaded to the card in blocks. Every block download
 855  * is tested for CRC errors, and retried a number of times before
 856  * returning failure.
 857  */
 858 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
 859                                     struct mwifiex_fw_image *fw)
 860 {
 861         struct sdio_mmc_card *card = adapter->card;
 862         const struct mwifiex_sdio_card_reg *reg = card->reg;
 863         int ret;
 864         u8 *firmware = fw->fw_buf;
 865         u32 firmware_len = fw->fw_len;
 866         u32 offset = 0;
 867         u8 base0, base1;
 868         u8 *fwbuf;
 869         u16 len = 0;
 870         u32 txlen, tx_blocks = 0, tries;
 871         u32 i = 0;
 872
 873         if (!firmware_len) {
 874                 dev_err(adapter->dev,
 875                         "firmware image not found! Terminating download\n");
 876                 return -1;
 877         }
 878
 879         dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
 880                 firmware_len);
 881
 882         /* Assume that the allocated buffer is 8-byte aligned */
 883         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
 884         if (!fwbuf)
 885                 return -ENOMEM;
 886
 887         /* Perform firmware data transfer */
 888         do {
 889                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
 890                    bits */
 891                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
 892                                                     DN_LD_CARD_RDY);
 893                 if (ret) {
 894                         dev_err(adapter->dev, "FW download with helper:"
 895                                 " poll status timeout @ %d\n", offset);
 896                         goto done;
 897                 }
 898
 899                 /* More data? */
 900                 if (offset >= firmware_len)
 901                         break;
 902
 903                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 904                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
 905                                                &base0);
 906                         if (ret) {
 907                                 dev_err(adapter->dev,
 908                                         "dev BASE0 register read failed: "
 909                                         "base0=%#04X(%d). Terminating dnld\n",
 910                                         base0, base0);
 911                                 goto done;
 912                         }
 913                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
 914                                                &base1);
 915                         if (ret) {
 916                                 dev_err(adapter->dev,
 917                                         "dev BASE1 register read failed: "
 918                                         "base1=%#04X(%d). Terminating dnld\n",
 919                                         base1, base1);
 920                                 goto done;
 921                         }
 922                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
 923
 924                         if (len)
 925                                 break;
 926
 927                         usleep_range(10, 20);
 928                 }
 929
 930                 if (!len) {
 931                         break;
 932                 } else if (len > MWIFIEX_UPLD_SIZE) {
 933                         dev_err(adapter->dev,
 934                                 "FW dnld failed @ %d, invalid length %d\n",
 935                                 offset, len);
 936                         ret = -1;
 937                         goto done;
 938                 }
 939
 940                 txlen = len;
 941
 942                 if (len & BIT(0)) {
 943                         i++;
 944                         if (i > MAX_WRITE_IOMEM_RETRY) {
 945                                 dev_err(adapter->dev,
 946                                         "FW dnld failed @ %d, over max retry\n",
 947                                         offset);
 948                                 ret = -1;
 949                                 goto done;
 950                         }
 951                         dev_err(adapter->dev, "CRC indicated by the helper:"
 952                                 " len = 0x%04X, txlen = %d\n", len, txlen);
 953                         len &= ~BIT(0);
 954                         /* Setting this to 0 to resend from same offset */
 955                         txlen = 0;
 956                 } else {
 957                         i = 0;
 958
 959                         /* Set blocksize to transfer - checking for last
 960                            block */
 961                         if (firmware_len - offset < txlen)
 962                                 txlen = firmware_len - offset;
 963
 964                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
 965                                     / MWIFIEX_SDIO_BLOCK_SIZE;
 966
 967                         /* Copy payload to buffer */
 968                         memmove(fwbuf, &firmware[offset], txlen);
 969                 }
 970
 971                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
 972                                               MWIFIEX_SDIO_BLOCK_SIZE,
 973                                               adapter->ioport);
 974                 if (ret) {
 975                         dev_err(adapter->dev,
 976                                 "FW download, write iomem (%d) failed @ %d\n",
 977                                 i, offset);
 978                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
 979                                 dev_err(adapter->dev, "write CFG reg failed\n");
 980
 981                         ret = -1;
 982                         goto done;
 983                 }
 984
 985                 offset += txlen;
 986         } while (true);
 987
 988         dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
 989                 offset);
 990
 991         ret = 0;
 992 done:
 993         kfree(fwbuf);
 994         return ret;
 995 }
 996
 997 /*
 998  * This function checks the firmware status in card.
 999  *
1000  * The winner interface is also determined by this function.
1001  */
1002 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1003                                    u32 poll_num)
1004 {
1005         struct sdio_mmc_card *card = adapter->card;
1006         int ret = 0;
1007         u16 firmware_stat;
1008         u32 tries;
1009         u8 winner_status;
1010
1011         /* Wait for firmware initialization event */
1012         for (tries = 0; tries < poll_num; tries++) {
1013                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1014                 if (ret)
1015                         continue;
1016                 if (firmware_stat == FIRMWARE_READY_SDIO) {
1017                         ret = 0;
1018                         break;
1019                 } else {
1020                         msleep(100);
1021                         ret = -1;
1022                 }
1023         }
1024
1025         if (ret) {
1026                 if (mwifiex_read_reg
1027                     (adapter, card->reg->status_reg_0, &winner_status))
1028                         winner_status = 0;
1029
1030                 if (winner_status)
1031                         adapter->winner = 0;
1032                 else
1033                         adapter->winner = 1;
1034         }
1035         return ret;
1036 }
1037
1038 /*
1039  * This function decodes a received packet.
1040  *
1041  * Based on the type, the packet is treated as either a data, or
1042  * a command response, or an event, and the correct handler
1043  * function is invoked.
1044  */
1045 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1046                                     struct sk_buff *skb, u32 upld_typ)
1047 {
1048         u8 *cmd_buf;
1049         __le16 *curr_ptr = (__le16 *)skb->data;
1050         u16 pkt_len = le16_to_cpu(*curr_ptr);
1051
1052         skb_trim(skb, pkt_len);
1053         skb_pull(skb, INTF_HEADER_LEN);
1054
1055         switch (upld_typ) {
1056         case MWIFIEX_TYPE_DATA:
1057                 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
1058                 mwifiex_handle_rx_packet(adapter, skb);
1059                 break;
1060
1061         case MWIFIEX_TYPE_CMD:
1062                 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
1063                 /* take care of curr_cmd = NULL case */
1064                 if (!adapter->curr_cmd) {
1065                         cmd_buf = adapter->upld_buf;
1066
1067                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1068                                 mwifiex_process_sleep_confirm_resp(adapter,
1069                                                                    skb->data,
1070                                                                    skb->len);
1071
1072                         memcpy(cmd_buf, skb->data,
1073                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1074                                      skb->len));
1075
1076                         dev_kfree_skb_any(skb);
1077                 } else {
1078                         adapter->cmd_resp_received = true;
1079                         adapter->curr_cmd->resp_skb = skb;
1080                 }
1081                 break;
1082
1083         case MWIFIEX_TYPE_EVENT:
1084                 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
1085                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1086
1087                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1088                         memcpy(adapter->event_body,
1089                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1090                                skb->len);
1091
1092                 /* event cause has been saved to adapter->event_cause */
1093                 adapter->event_received = true;
1094                 adapter->event_skb = skb;
1095
1096                 break;
1097
1098         default:
1099                 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
1100                 dev_kfree_skb_any(skb);
1101                 break;
1102         }
1103
1104         return 0;
1105 }
1106
1107 /*
1108  * This function transfers received packets from card to driver, performing
1109  * aggregation if required.
1110  *
1111  * For data received on control port, or if aggregation is disabled, the
1112  * received buffers are uploaded as separate packets. However, if aggregation
1113  * is enabled and required, the buffers are copied onto an aggregation buffer,
1114  * provided there is space left, processed and finally uploaded.
1115  */
1116 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1117                                              struct sk_buff *skb, u8 port)
1118 {
1119         struct sdio_mmc_card *card = adapter->card;
1120         s32 f_do_rx_aggr = 0;
1121         s32 f_do_rx_cur = 0;
1122         s32 f_aggr_cur = 0;
1123         struct sk_buff *skb_deaggr;
1124         u32 pind;
1125         u32 pkt_len, pkt_type, mport;
1126         u8 *curr_ptr;
1127         u32 rx_len = skb->len;
1128
1129         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1130                 /* Read the command Resp without aggr */
1131                 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1132                         "response\n", __func__);
1133
1134                 f_do_rx_cur = 1;
1135                 goto rx_curr_single;
1136         }
1137
1138         if (!card->mpa_rx.enabled) {
1139                 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1140                         __func__);
1141
1142                 f_do_rx_cur = 1;
1143                 goto rx_curr_single;
1144         }
1145
1146         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1147                                          card->reg->data_port_mask)) ||
1148             (card->has_control_mask && (card->mp_rd_bitmap &
1149                                         (~((u32) CTRL_PORT_MASK))))) {
1150                 /* Some more data RX pending */
1151                 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1152
1153                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1154                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1155                                 f_aggr_cur = 1;
1156                         } else {
1157                                 /* No room in Aggr buf, do rx aggr now */
1158                                 f_do_rx_aggr = 1;
1159                                 f_do_rx_cur = 1;
1160                         }
1161                 } else {
1162                         /* Rx aggr not in progress */
1163                         f_aggr_cur = 1;
1164                 }
1165
1166         } else {
1167                 /* No more data RX pending */
1168                 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1169
1170                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1171                         f_do_rx_aggr = 1;
1172                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1173                                 f_aggr_cur = 1;
1174                         else
1175                                 /* No room in Aggr buf, do rx aggr now */
1176                                 f_do_rx_cur = 1;
1177                 } else {
1178                         f_do_rx_cur = 1;
1179                 }
1180         }
1181
1182         if (f_aggr_cur) {
1183                 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1184                 /* Curr pkt can be aggregated */
1185                 mp_rx_aggr_setup(card, skb, port);
1186
1187                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1188                     mp_rx_aggr_port_limit_reached(card)) {
1189                         dev_dbg(adapter->dev, "info: %s: aggregated packet "
1190                                 "limit reached\n", __func__);
1191                         /* No more pkts allowed in Aggr buf, rx it */
1192                         f_do_rx_aggr = 1;
1193                 }
1194         }
1195
1196         if (f_do_rx_aggr) {
1197                 /* do aggr RX now */
1198                 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1199                         card->mpa_rx.pkt_cnt);
1200
1201                 if (card->supports_sdio_new_mode) {
1202                         int i;
1203                         u32 port_count;
1204
1205                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1206                                 if (card->mpa_rx.ports & BIT(i))
1207                                         port_count++;
1208
1209                         /* Reading data from "start_port + 0" to "start_port +
1210                          * port_count -1", so decrease the count by 1
1211                          */
1212                         port_count--;
1213                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1214                                  (port_count << 8)) + card->mpa_rx.start_port;
1215                 } else {
1216                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1217                                  (card->mpa_rx.ports << 4)) +
1218                                  card->mpa_rx.start_port;
1219                 }
1220
1221                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1222                                            card->mpa_rx.buf_len, mport, 1))
1223                         goto error;
1224
1225                 curr_ptr = card->mpa_rx.buf;
1226
1227                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1228
1229                         /* get curr PKT len & type */
1230                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1231                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1232
1233                         /* copy pkt to deaggr buf */
1234                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1235
1236                         if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1237                                          card->mpa_rx.len_arr[pind])) {
1238
1239                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1240
1241                                 skb_trim(skb_deaggr, pkt_len);
1242
1243                                 /* Process de-aggr packet */
1244                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1245                                                          pkt_type);
1246                         } else {
1247                                 dev_err(adapter->dev, "wrong aggr pkt:"
1248                                         " type=%d len=%d max_len=%d\n",
1249                                         pkt_type, pkt_len,
1250                                         card->mpa_rx.len_arr[pind]);
1251                                 dev_kfree_skb_any(skb_deaggr);
1252                         }
1253                         curr_ptr += card->mpa_rx.len_arr[pind];
1254                 }
1255                 MP_RX_AGGR_BUF_RESET(card);
1256         }
1257
1258 rx_curr_single:
1259         if (f_do_rx_cur) {
1260                 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1261                         port, rx_len);
1262
1263                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1264                                               skb->data, skb->len,
1265                                               adapter->ioport + port))
1266                         goto error;
1267
1268                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1269         }
1270
1271         return 0;
1272
1273 error:
1274         if (MP_RX_AGGR_IN_PROGRESS(card)) {
1275                 /* Multiport-aggregation transfer failed - cleanup */
1276                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1277                         /* copy pkt to deaggr buf */
1278                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1279                         dev_kfree_skb_any(skb_deaggr);
1280                 }
1281                 MP_RX_AGGR_BUF_RESET(card);
1282         }
1283
1284         if (f_do_rx_cur)
1285                 /* Single transfer pending. Free curr buff also */
1286                 dev_kfree_skb_any(skb);
1287
1288         return -1;
1289 }
1290
1291 /*
1292  * This function checks the current interrupt status.
1293  *
1294  * The following interrupts are checked and handled by this function -
1295  *      - Data sent
1296  *      - Command sent
1297  *      - Packets received
1298  *
1299  * Since the firmware does not generate download ready interrupt if the
1300  * port updated is command port only, command sent interrupt checking
1301  * should be done manually, and for every SDIO interrupt.
1302  *
1303  * In case of Rx packets received, the packets are uploaded from card to
1304  * host and processed accordingly.
1305  */
1306 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1307 {
1308         struct sdio_mmc_card *card = adapter->card;
1309         const struct mwifiex_sdio_card_reg *reg = card->reg;
1310         int ret = 0;
1311         u8 sdio_ireg;
1312         struct sk_buff *skb;
1313         u8 port = CTRL_PORT;
1314         u32 len_reg_l, len_reg_u;
1315         u32 rx_blocks;
1316         u16 rx_len;
1317         unsigned long flags;
1318         u32 bitmap;
1319         u8 cr;
1320
1321         spin_lock_irqsave(&adapter->int_lock, flags);
1322         sdio_ireg = adapter->int_status;
1323         adapter->int_status = 0;
1324         spin_unlock_irqrestore(&adapter->int_lock, flags);
1325
1326         if (!sdio_ireg)
1327                 return ret;
1328
1329         /* Following interrupt is only for SDIO new mode */
1330         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1331                 adapter->cmd_sent = false;
1332
1333         /* Following interrupt is only for SDIO new mode */
1334         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1335                 u32 pkt_type;
1336
1337                 /* read the len of control packet */
1338                 rx_len = card->mp_regs[CMD_RD_LEN_1] << 8;
1339                 rx_len |= (u16) card->mp_regs[CMD_RD_LEN_0];
1340                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1341                 if (rx_len <= INTF_HEADER_LEN ||
1342                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1343                      MWIFIEX_RX_DATA_BUF_SIZE)
1344                         return -1;
1345                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1346
1347                 skb = dev_alloc_skb(rx_len);
1348                 if (!skb)
1349                         return -1;
1350
1351                 skb_put(skb, rx_len);
1352
1353                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1354                                               skb->len, adapter->ioport |
1355                                                         CMD_PORT_SLCT)) {
1356                         dev_err(adapter->dev,
1357                                 "%s: failed to card_to_host", __func__);
1358                         dev_kfree_skb_any(skb);
1359                         goto term_cmd;
1360                 }
1361
1362                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1363                     (pkt_type != MWIFIEX_TYPE_EVENT))
1364                         dev_err(adapter->dev,
1365                                 "%s:Received wrong packet on cmd port",
1366                                 __func__);
1367
1368                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1369         }
1370
1371         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1372                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1373                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1374                 if (card->supports_sdio_new_mode) {
1375                         bitmap |=
1376                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1377                         bitmap |=
1378                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1379                 }
1380                 card->mp_wr_bitmap = bitmap;
1381
1382                 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
1383                         card->mp_wr_bitmap);
1384                 if (adapter->data_sent &&
1385                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1386                         dev_dbg(adapter->dev,
1387                                 "info:  <--- Tx DONE Interrupt --->\n");
1388                         adapter->data_sent = false;
1389                 }
1390         }
1391
1392         /* As firmware will not generate download ready interrupt if the port
1393            updated is command port only, cmd_sent should be done for any SDIO
1394            interrupt. */
1395         if (card->has_control_mask && adapter->cmd_sent) {
1396                 /* Check if firmware has attach buffer at command port and
1397                    update just that in wr_bit_map. */
1398                 card->mp_wr_bitmap |=
1399                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1400                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1401                         adapter->cmd_sent = false;
1402         }
1403
1404         dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1405                 adapter->cmd_sent, adapter->data_sent);
1406         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1407                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1408                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1409                 if (card->supports_sdio_new_mode) {
1410                         bitmap |=
1411                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1412                         bitmap |=
1413                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1414                 }
1415                 card->mp_rd_bitmap = bitmap;
1416                 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
1417                         card->mp_rd_bitmap);
1418
1419                 while (true) {
1420                         ret = mwifiex_get_rd_port(adapter, &port);
1421                         if (ret) {
1422                                 dev_dbg(adapter->dev,
1423                                         "info: no more rd_port available\n");
1424                                 break;
1425                         }
1426                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1427                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1428                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1429                         rx_len |= (u16) card->mp_regs[len_reg_l];
1430                         dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1431                                 port, rx_len);
1432                         rx_blocks =
1433                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1434                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1435                         if (rx_len <= INTF_HEADER_LEN ||
1436                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1437                              MWIFIEX_RX_DATA_BUF_SIZE) {
1438                                 dev_err(adapter->dev, "invalid rx_len=%d\n",
1439                                         rx_len);
1440                                 return -1;
1441                         }
1442                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1443
1444                         skb = dev_alloc_skb(rx_len);
1445
1446                         if (!skb) {
1447                                 dev_err(adapter->dev, "%s: failed to alloc skb",
1448                                         __func__);
1449                                 return -1;
1450                         }
1451
1452                         skb_put(skb, rx_len);
1453
1454                         dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1455                                 rx_len, skb->len);
1456
1457                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1458                                                               port)) {
1459                                 dev_err(adapter->dev, "card_to_host_mpa failed:"
1460                                         " int status=%#x\n", sdio_ireg);
1461                                 goto term_cmd;
1462                         }
1463                 }
1464         }
1465
1466         return 0;
1467
1468 term_cmd:
1469         /* terminate cmd */
1470         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1471                 dev_err(adapter->dev, "read CFG reg failed\n");
1472         else
1473                 dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
1474
1475         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1476                 dev_err(adapter->dev, "write CFG reg failed\n");
1477         else
1478                 dev_dbg(adapter->dev, "info: write success\n");
1479
1480         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1481                 dev_err(adapter->dev, "read CFG reg failed\n");
1482         else
1483                 dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
1484
1485         return -1;
1486 }
1487
1488 /*
1489  * This function aggregates transmission buffers in driver and downloads
1490  * the aggregated packet to card.
1491  *
1492  * The individual packets are aggregated by copying into an aggregation
1493  * buffer and then downloaded to the card. Previous unsent packets in the
1494  * aggregation buffer are pre-copied first before new packets are added.
1495  * Aggregation is done till there is space left in the aggregation buffer,
1496  * or till new packets are available.
1497  *
1498  * The function will only download the packet to the card when aggregation
1499  * stops, otherwise it will just aggregate the packet in aggregation buffer
1500  * and return.
1501  */
1502 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1503                                         u8 *payload, u32 pkt_len, u32 port,
1504                                         u32 next_pkt_len)
1505 {
1506         struct sdio_mmc_card *card = adapter->card;
1507         int ret = 0;
1508         s32 f_send_aggr_buf = 0;
1509         s32 f_send_cur_buf = 0;
1510         s32 f_precopy_cur_buf = 0;
1511         s32 f_postcopy_cur_buf = 0;
1512         u32 mport;
1513
1514         if (!card->mpa_tx.enabled ||
1515             (card->has_control_mask && (port == CTRL_PORT)) ||
1516             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1517                 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1518                         __func__);
1519
1520                 f_send_cur_buf = 1;
1521                 goto tx_curr_single;
1522         }
1523
1524         if (next_pkt_len) {
1525                 /* More pkt in TX queue */
1526                 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1527                         __func__);
1528
1529                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1530                         if (!mp_tx_aggr_port_limit_reached(card) &&
1531                             MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1532                                 f_precopy_cur_buf = 1;
1533
1534                                 if (!(card->mp_wr_bitmap &
1535                                       (1 << card->curr_wr_port)) ||
1536                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1537                                             card, pkt_len + next_pkt_len))
1538                                         f_send_aggr_buf = 1;
1539                         } else {
1540                                 /* No room in Aggr buf, send it */
1541                                 f_send_aggr_buf = 1;
1542
1543                                 if (mp_tx_aggr_port_limit_reached(card) ||
1544                                     !(card->mp_wr_bitmap &
1545                                       (1 << card->curr_wr_port)))
1546                                         f_send_cur_buf = 1;
1547                                 else
1548                                         f_postcopy_cur_buf = 1;
1549                         }
1550                 } else {
1551                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1552                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1553                                 f_precopy_cur_buf = 1;
1554                         else
1555                                 f_send_cur_buf = 1;
1556                 }
1557         } else {
1558                 /* Last pkt in TX queue */
1559                 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1560                         __func__);
1561
1562                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1563                         /* some packs in Aggr buf already */
1564                         f_send_aggr_buf = 1;
1565
1566                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1567                                 f_precopy_cur_buf = 1;
1568                         else
1569                                 /* No room in Aggr buf, send it */
1570                                 f_send_cur_buf = 1;
1571                 } else {
1572                         f_send_cur_buf = 1;
1573                 }
1574         }
1575
1576         if (f_precopy_cur_buf) {
1577                 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1578                         __func__);
1579                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1580
1581                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1582                     mp_tx_aggr_port_limit_reached(card))
1583                         /* No more pkts allowed in Aggr buf, send it */
1584                         f_send_aggr_buf = 1;
1585         }
1586
1587         if (f_send_aggr_buf) {
1588                 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1589                         __func__,
1590                                 card->mpa_tx.start_port, card->mpa_tx.ports);
1591                 if (card->supports_sdio_new_mode) {
1592                         u32 port_count;
1593                         int i;
1594
1595                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1596                                 if (card->mpa_tx.ports & BIT(i))
1597                                         port_count++;
1598
1599                         /* Writing data from "start_port + 0" to "start_port +
1600                          * port_count -1", so decrease the count by 1
1601                          */
1602                         port_count--;
1603                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1604                                  (port_count << 8)) + card->mpa_tx.start_port;
1605                 } else {
1606                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1607                                  (card->mpa_tx.ports << 4)) +
1608                                  card->mpa_tx.start_port;
1609                 }
1610
1611                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1612                                                  card->mpa_tx.buf_len, mport);
1613
1614                 MP_TX_AGGR_BUF_RESET(card);
1615         }
1616
1617 tx_curr_single:
1618         if (f_send_cur_buf) {
1619                 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1620                         __func__, port);
1621                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1622                                                  adapter->ioport + port);
1623         }
1624
1625         if (f_postcopy_cur_buf) {
1626                 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1627                         __func__);
1628                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1629         }
1630
1631         return ret;
1632 }
1633
1634 /*
1635  * This function downloads data from driver to card.
1636  *
1637  * Both commands and data packets are transferred to the card by this
1638  * function.
1639  *
1640  * This function adds the SDIO specific header to the front of the buffer
1641  * before transferring. The header contains the length of the packet and
1642  * the type. The firmware handles the packets based upon this set type.
1643  */
1644 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1645                                      u8 type, struct sk_buff *skb,
1646                                      struct mwifiex_tx_param *tx_param)
1647 {
1648         struct sdio_mmc_card *card = adapter->card;
1649         int ret;
1650         u32 buf_block_len;
1651         u32 blk_size;
1652         u32 port = CTRL_PORT;
1653         u8 *payload = (u8 *)skb->data;
1654         u32 pkt_len = skb->len;
1655
1656         /* Allocate buffer and copy payload */
1657         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1658         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1659         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1660         *(__le16 *)&payload[2] = cpu_to_le16(type);
1661
1662         /*
1663          * This is SDIO specific header
1664          *  u16 length,
1665          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1666          *  MWIFIEX_TYPE_EVENT = 3)
1667          */
1668         if (type == MWIFIEX_TYPE_DATA) {
1669                 ret = mwifiex_get_wr_port_data(adapter, &port);
1670                 if (ret) {
1671                         dev_err(adapter->dev, "%s: no wr_port available\n",
1672                                 __func__);
1673                         return ret;
1674                 }
1675         } else {
1676                 adapter->cmd_sent = true;
1677                 /* Type must be MWIFIEX_TYPE_CMD */
1678
1679                 if (pkt_len <= INTF_HEADER_LEN ||
1680                     pkt_len > MWIFIEX_UPLD_SIZE)
1681                         dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1682                                 __func__, payload, pkt_len);
1683
1684                 if (card->supports_sdio_new_mode)
1685                         port = CMD_PORT_SLCT;
1686         }
1687
1688         /* Transfer data to card */
1689         pkt_len = buf_block_len * blk_size;
1690
1691         if (tx_param)
1692                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1693                                                    port, tx_param->next_pkt_len
1694                                                    );
1695         else
1696                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1697                                                    port, 0);
1698
1699         if (ret) {
1700                 if (type == MWIFIEX_TYPE_CMD)
1701                         adapter->cmd_sent = false;
1702                 if (type == MWIFIEX_TYPE_DATA) {
1703                         adapter->data_sent = false;
1704                         /* restore curr_wr_port in error cases */
1705                         card->curr_wr_port = port;
1706                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1707                 }
1708         } else {
1709                 if (type == MWIFIEX_TYPE_DATA) {
1710                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1711                                 adapter->data_sent = true;
1712                         else
1713                                 adapter->data_sent = false;
1714                 }
1715         }
1716
1717         return ret;
1718 }
1719
1720 /*
1721  * This function allocates the MPA Tx and Rx buffers.
1722  */
1723 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1724                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1725 {
1726         struct sdio_mmc_card *card = adapter->card;
1727         int ret = 0;
1728
1729         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1730         if (!card->mpa_tx.buf) {
1731                 ret = -1;
1732                 goto error;
1733         }
1734
1735         card->mpa_tx.buf_size = mpa_tx_buf_size;
1736
1737         card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1738         if (!card->mpa_rx.buf) {
1739                 ret = -1;
1740                 goto error;
1741         }
1742
1743         card->mpa_rx.buf_size = mpa_rx_buf_size;
1744
1745 error:
1746         if (ret) {
1747                 kfree(card->mpa_tx.buf);
1748                 kfree(card->mpa_rx.buf);
1749         }
1750
1751         return ret;
1752 }
1753
1754 /*
1755  * This function unregisters the SDIO device.
1756  *
1757  * The SDIO IRQ is released, the function is disabled and driver
1758  * data is set to null.
1759  */
1760 static void
1761 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1762 {
1763         struct sdio_mmc_card *card = adapter->card;
1764
1765         if (adapter->card) {
1766                 sdio_claim_host(card->func);
1767                 sdio_disable_func(card->func);
1768                 sdio_release_host(card->func);
1769         }
1770 }
1771
1772 /*
1773  * This function registers the SDIO device.
1774  *
1775  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1776  */
1777 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1778 {
1779         int ret;
1780         struct sdio_mmc_card *card = adapter->card;
1781         struct sdio_func *func = card->func;
1782
1783         /* save adapter pointer in card */
1784         card->adapter = adapter;
1785         adapter->tx_buf_size = card->tx_buf_size;
1786
1787         sdio_claim_host(func);
1788
1789         /* Set block size */
1790         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1791         sdio_release_host(func);
1792         if (ret) {
1793                 pr_err("cannot set SDIO block size\n");
1794                 return ret;
1795         }
1796
1797
1798         adapter->dev = &func->dev;
1799
1800         strcpy(adapter->fw_name, card->firmware);
1801         adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1802         adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1803
1804         return 0;
1805 }
1806
1807 /*
1808  * This function initializes the SDIO driver.
1809  *
1810  * The following initializations steps are followed -
1811  *      - Read the Host interrupt status register to acknowledge
1812  *        the first interrupt got from bootloader
1813  *      - Disable host interrupt mask register
1814  *      - Get SDIO port
1815  *      - Initialize SDIO variables in card
1816  *      - Allocate MP registers
1817  *      - Allocate MPA Tx and Rx buffers
1818  */
1819 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1820 {
1821         struct sdio_mmc_card *card = adapter->card;
1822         const struct mwifiex_sdio_card_reg *reg = card->reg;
1823         int ret;
1824         u8 sdio_ireg;
1825
1826         sdio_set_drvdata(card->func, card);
1827
1828         /*
1829          * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
1830          * from the bootloader. If we don't do this we get a interrupt
1831          * as soon as we register the irq.
1832          */
1833         mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);
1834
1835         /* Get SDIO ioport */
1836         mwifiex_init_sdio_ioport(adapter);
1837
1838         /* Initialize SDIO variables in card */
1839         card->mp_rd_bitmap = 0;
1840         card->mp_wr_bitmap = 0;
1841         card->curr_rd_port = reg->start_rd_port;
1842         card->curr_wr_port = reg->start_wr_port;
1843
1844         card->mp_data_port_mask = reg->data_port_mask;
1845
1846         card->mpa_tx.buf_len = 0;
1847         card->mpa_tx.pkt_cnt = 0;
1848         card->mpa_tx.start_port = 0;
1849
1850         card->mpa_tx.enabled = 1;
1851         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1852
1853         card->mpa_rx.buf_len = 0;
1854         card->mpa_rx.pkt_cnt = 0;
1855         card->mpa_rx.start_port = 0;
1856
1857         card->mpa_rx.enabled = 1;
1858         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1859
1860         /* Allocate buffers for SDIO MP-A */
1861         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
1862         if (!card->mp_regs)
1863                 return -ENOMEM;
1864
1865         /* Allocate skb pointer buffers */
1866         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
1867                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1868         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
1869                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1870         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1871                                              card->mp_tx_agg_buf_size,
1872                                              card->mp_rx_agg_buf_size);
1873         if (ret) {
1874                 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1875                 kfree(card->mp_regs);
1876                 return -1;
1877         }
1878
1879         return ret;
1880 }
1881
1882 /*
1883  * This function resets the MPA Tx and Rx buffers.
1884  */
1885 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1886 {
1887         struct sdio_mmc_card *card = adapter->card;
1888
1889         MP_TX_AGGR_BUF_RESET(card);
1890         MP_RX_AGGR_BUF_RESET(card);
1891 }
1892
1893 /*
1894  * This function cleans up the allocated card buffers.
1895  *
1896  * The following are freed by this function -
1897  *      - MP registers
1898  *      - MPA Tx buffer
1899  *      - MPA Rx buffer
1900  */
1901 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1902 {
1903         struct sdio_mmc_card *card = adapter->card;
1904
1905         kfree(card->mp_regs);
1906         kfree(card->mpa_rx.skb_arr);
1907         kfree(card->mpa_rx.len_arr);
1908         kfree(card->mpa_tx.buf);
1909         kfree(card->mpa_rx.buf);
1910         sdio_set_drvdata(card->func, NULL);
1911         kfree(card);
1912 }
1913
1914 /*
1915  * This function updates the MP end port in card.
1916  */
1917 static void
1918 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1919 {
1920         struct sdio_mmc_card *card = adapter->card;
1921         const struct mwifiex_sdio_card_reg *reg = card->reg;
1922         int i;
1923
1924         card->mp_end_port = port;
1925
1926         card->mp_data_port_mask = reg->data_port_mask;
1927
1928         if (reg->start_wr_port) {
1929                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
1930                         card->mp_data_port_mask &=
1931                                         ~(1 << (card->max_ports - i));
1932         }
1933
1934         card->curr_wr_port = reg->start_wr_port;
1935
1936         dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1937                 port, card->mp_data_port_mask);
1938 }
1939
1940 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
1941 {
1942         struct sdio_mmc_card *card = adapter->card;
1943         struct mmc_host *target = card->func->card->host;
1944
1945         /* The actual reset operation must be run outside of driver thread.
1946          * This is because mmc_remove_host() will cause the device to be
1947          * instantly destroyed, and the driver then needs to end its thread,
1948          * leading to a deadlock.
1949          *
1950          * We run it in a totally independent workqueue.
1951          */
1952
1953         pr_err("Resetting card...\n");
1954         mmc_remove_host(target);
1955         /* 20ms delay is based on experiment with sdhci controller */
1956         mdelay(20);
1957         target->rescan_entered = 0; /* rescan non-removable cards */
1958         mmc_add_host(target);
1959 }
1960
1961 /* This function read/write firmware */
1962 static enum
1963 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
1964                                        u8 doneflag)
1965 {
1966         struct sdio_mmc_card *card = adapter->card;
1967         int ret, tries;
1968         u8 ctrl_data = 0;
1969
1970         sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
1971                     &ret);
1972         if (ret) {
1973                 dev_err(adapter->dev, "SDIO Write ERR\n");
1974                 return RDWR_STATUS_FAILURE;
1975         }
1976         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
1977                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
1978                                        &ret);
1979                 if (ret) {
1980                         dev_err(adapter->dev, "SDIO read err\n");
1981                         return RDWR_STATUS_FAILURE;
1982                 }
1983                 if (ctrl_data == FW_DUMP_DONE)
1984                         break;
1985                 if (doneflag && ctrl_data == doneflag)
1986                         return RDWR_STATUS_DONE;
1987                 if (ctrl_data != FW_DUMP_HOST_READY) {
1988                         dev_info(adapter->dev,
1989                                  "The ctrl reg was changed, re-try again!\n");
1990                         sdio_writeb(card->func, FW_DUMP_HOST_READY,
1991                                     card->reg->fw_dump_ctrl, &ret);
1992                         if (ret) {
1993                                 dev_err(adapter->dev, "SDIO write err\n");
1994                                 return RDWR_STATUS_FAILURE;
1995                         }
1996                 }
1997                 usleep_range(100, 200);
1998         }
1999         if (ctrl_data == FW_DUMP_HOST_READY) {
2000                 dev_err(adapter->dev, "Fail to pull ctrl_data\n");
2001                 return RDWR_STATUS_FAILURE;
2002         }
2003
2004         return RDWR_STATUS_SUCCESS;
2005 }
2006
2007 /* This function dump firmware memory to file */
2008 static void mwifiex_sdio_fw_dump_work(struct work_struct *work)
2009 {
2010         struct mwifiex_adapter *adapter =
2011                         container_of(work, struct mwifiex_adapter, iface_work);
2012         struct sdio_mmc_card *card = adapter->card;
2013         int ret = 0;
2014         unsigned int reg, reg_start, reg_end;
2015         u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2016         enum rdwr_status stat;
2017         u32 memory_size;
2018         static char *env[] = { "DRIVER=mwifiex_sdio", "EVENT=fw_dump", NULL };
2019
2020         if (!card->supports_fw_dump)
2021                 return;
2022
2023         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2024                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2025
2026                 if (entry->mem_ptr) {
2027                         vfree(entry->mem_ptr);
2028                         entry->mem_ptr = NULL;
2029                 }
2030                 entry->mem_size = 0;
2031         }
2032
2033         mwifiex_pm_wakeup_card(adapter);
2034         sdio_claim_host(card->func);
2035
2036         dev_info(adapter->dev, "== mwifiex firmware dump start ==\n");
2037
2038         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2039         if (stat == RDWR_STATUS_FAILURE)
2040                 goto done;
2041
2042         reg = card->reg->fw_dump_start;
2043         /* Read the number of the memories which will dump */
2044         dump_num = sdio_readb(card->func, reg, &ret);
2045         if (ret) {
2046                 dev_err(adapter->dev, "SDIO read memory length err\n");
2047                 goto done;
2048         }
2049
2050         /* Read the length of every memory which will dump */
2051         for (idx = 0; idx < dump_num; idx++) {
2052                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2053
2054                 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2055                 if (stat == RDWR_STATUS_FAILURE)
2056                         goto done;
2057
2058                 memory_size = 0;
2059                 reg = card->reg->fw_dump_start;
2060                 for (i = 0; i < 4; i++) {
2061                         read_reg = sdio_readb(card->func, reg, &ret);
2062                         if (ret) {
2063                                 dev_err(adapter->dev, "SDIO read err\n");
2064                                 goto done;
2065                         }
2066                         memory_size |= (read_reg << i*8);
2067                         reg++;
2068                 }
2069
2070                 if (memory_size == 0) {
2071                         dev_info(adapter->dev, "Firmware dump Finished!\n");
2072                         break;
2073                 }
2074
2075                 dev_info(adapter->dev,
2076                          "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2077                 entry->mem_ptr = vmalloc(memory_size + 1);
2078                 entry->mem_size = memory_size;
2079                 if (!entry->mem_ptr) {
2080                         dev_err(adapter->dev, "Vmalloc %s failed\n",
2081                                 entry->mem_name);
2082                         goto done;
2083                 }
2084                 dbg_ptr = entry->mem_ptr;
2085                 end_ptr = dbg_ptr + memory_size;
2086
2087                 doneflag = entry->done_flag;
2088                 dev_info(adapter->dev, "Start %s output, please wait...\n",
2089                          entry->mem_name);
2090
2091                 do {
2092                         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2093                         if (stat == RDWR_STATUS_FAILURE)
2094                                 goto done;
2095
2096                         reg_start = card->reg->fw_dump_start;
2097                         reg_end = card->reg->fw_dump_end;
2098                         for (reg = reg_start; reg <= reg_end; reg++) {
2099                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2100                                 if (ret) {
2101                                         dev_err(adapter->dev,
2102                                                 "SDIO read err\n");
2103                                         goto done;
2104                                 }
2105                                 if (dbg_ptr < end_ptr)
2106                                         dbg_ptr++;
2107                                 else
2108                                         dev_err(adapter->dev,
2109                                                 "Allocated buf not enough\n");
2110                         }
2111
2112                         if (stat != RDWR_STATUS_DONE)
2113                                 continue;
2114
2115                         dev_info(adapter->dev, "%s done: size=0x%tx\n",
2116                                  entry->mem_name, dbg_ptr - entry->mem_ptr);
2117                         break;
2118                 } while (1);
2119         }
2120         dev_info(adapter->dev, "== mwifiex firmware dump end ==\n");
2121
2122         kobject_uevent_env(&adapter->wiphy->dev.kobj, KOBJ_CHANGE, env);
2123
2124 done:
2125         sdio_release_host(card->func);
2126         adapter->curr_mem_idx = 0;
2127 }
2128
2129 static void mwifiex_sdio_work(struct work_struct *work)
2130 {
2131         struct mwifiex_adapter *adapter =
2132                         container_of(work, struct mwifiex_adapter, iface_work);
2133
2134         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2135                                &adapter->iface_work_flags))
2136                 mwifiex_sdio_card_reset_work(adapter);
2137         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_FW_DUMP,
2138                                &adapter->iface_work_flags))
2139                 mwifiex_sdio_fw_dump_work(work);
2140 }
2141
2142 /* This function resets the card */
2143 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2144 {
2145         if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &adapter->iface_work_flags))
2146                 return;
2147
2148         set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &adapter->iface_work_flags);
2149
2150         schedule_work(&adapter->iface_work);
2151 }
2152
2153 /* This function dumps FW information */
2154 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2155 {
2156         if (test_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &adapter->iface_work_flags))
2157                 return;
2158
2159         set_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &adapter->iface_work_flags);
2160         schedule_work(&adapter->iface_work);
2161 }
2162
2163 static struct mwifiex_if_ops sdio_ops = {
2164         .init_if = mwifiex_init_sdio,
2165         .cleanup_if = mwifiex_cleanup_sdio,
2166         .check_fw_status = mwifiex_check_fw_status,
2167         .prog_fw = mwifiex_prog_fw_w_helper,
2168         .register_dev = mwifiex_register_dev,
2169         .unregister_dev = mwifiex_unregister_dev,
2170         .enable_int = mwifiex_sdio_enable_host_int,
2171         .disable_int = mwifiex_sdio_disable_host_int,
2172         .process_int_status = mwifiex_process_int_status,
2173         .host_to_card = mwifiex_sdio_host_to_card,
2174         .wakeup = mwifiex_pm_wakeup_card,
2175         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2176
2177         /* SDIO specific */
2178         .update_mp_end_port = mwifiex_update_mp_end_port,
2179         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2180         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2181         .event_complete = mwifiex_sdio_event_complete,
2182         .card_reset = mwifiex_sdio_card_reset,
2183         .iface_work = mwifiex_sdio_work,
2184         .fw_dump = mwifiex_sdio_fw_dump,
2185 };
2186
2187 /*
2188  * This function initializes the SDIO driver.
2189  *
2190  * This initiates the semaphore and registers the device with
2191  * SDIO bus.
2192  */
2193 static int
2194 mwifiex_sdio_init_module(void)
2195 {
2196         sema_init(&add_remove_card_sem, 1);
2197
2198         /* Clear the flag in case user removes the card. */
2199         user_rmmod = 0;
2200
2201         return sdio_register_driver(&mwifiex_sdio);
2202 }
2203
2204 /*
2205  * This function cleans up the SDIO driver.
2206  *
2207  * The following major steps are followed for cleanup -
2208  *      - Resume the device if its suspended
2209  *      - Disconnect the device if connected
2210  *      - Shutdown the firmware
2211  *      - Unregister the device from SDIO bus.
2212  */
2213 static void
2214 mwifiex_sdio_cleanup_module(void)
2215 {
2216         if (!down_interruptible(&add_remove_card_sem))
2217                 up(&add_remove_card_sem);
2218
2219         /* Set the flag as user is removing this module. */
2220         user_rmmod = 1;
2221
2222         sdio_unregister_driver(&mwifiex_sdio);
2223 }
2224
2225 module_init(mwifiex_sdio_init_module);
2226 module_exit(mwifiex_sdio_cleanup_module);
2227
2228 MODULE_AUTHOR("Marvell International Ltd.");
2229 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2230 MODULE_VERSION(SDIO_VERSION);
2231 MODULE_LICENSE("GPL v2");
2232 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2233 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2234 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2235 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);