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