drivers/net/wireless/rsi/rsi_91x

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
rsi_sdio_set_cmd52_arg
rsi_cmd52writebyte
rsi_cmd52readbyte
rsi_issue_sdiocommand
rsi_handle_interrupt
rsi_reset_card
rsi_setclock
rsi_setblocklength
rsi_setupcard
rsi_sdio_read_register
rsi_sdio_write_register
rsi_sdio_ack_intr
rsi_sdio_read_register_multiple
rsi_sdio_write_register_multiple
rsi_sdio_load_data_master_write
rsi_sdio_master_reg_read
rsi_sdio_master_reg_write
rsi_sdio_host_intf_write_pkt
rsi_sdio_host_intf_read_pkt
rsi_init_sdio_interface
rsi_sdio_reinit_device
rsi_sdio_ta_reset
rsi_probe
ulp_read_write
rsi_reset_chip
rsi_disconnect
rsi_set_sdio_pm_caps
rsi_sdio_disable_interrupts
rsi_sdio_enable_interrupts
rsi_suspend
rsi_resume
rsi_freeze
rsi_thaw
rsi_shutdown
rsi_restore
rsi_module_init
rsi_module_exit
   1 /**
   2  * Copyright (c) 2014 Redpine Signals Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  *
  16  */
  17 
  18 #include <linux/module.h>
  19 #include "rsi_sdio.h"
  20 #include "rsi_common.h"
  21 #include "rsi_coex.h"
  22 #include "rsi_hal.h"
  23 
  24 /* Default operating mode is wlan STA + BT */
  25 static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
  26 module_param(dev_oper_mode, ushort, 0444);
  27 MODULE_PARM_DESC(dev_oper_mode,
  28                  "1[Wi-Fi], 4[BT], 8[BT LE], 5[Wi-Fi STA + BT classic]\n"
  29                  "9[Wi-Fi STA + BT LE], 13[Wi-Fi STA + BT classic + BT LE]\n"
  30                  "6[AP + BT classic], 14[AP + BT classic + BT LE]");
  31 
  32 /**
  33  * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg.
  34  * @rw: Read/write
  35  * @func: function number
  36  * @raw: indicates whether to perform read after write
  37  * @address: address to which to read/write
  38  * @writedata: data to write
  39  *
  40  * Return: argument
  41  */
  42 static u32 rsi_sdio_set_cmd52_arg(bool rw,
  43                                   u8 func,
  44                                   u8 raw,
  45                                   u32 address,
  46                                   u8 writedata)
  47 {
  48         return ((rw & 1) << 31) | ((func & 0x7) << 28) |
  49                 ((raw & 1) << 27) | (1 << 26) |
  50                 ((address & 0x1FFFF) << 9) | (1 << 8) |
  51                 (writedata & 0xFF);
  52 }
  53 
  54 /**
  55  * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card.
  56  * @card: Pointer to the mmc_card.
  57  * @address: Address to write.
  58  * @byte: Data to write.
  59  *
  60  * Return: Write status.
  61  */
  62 static int rsi_cmd52writebyte(struct mmc_card *card,
  63                               u32 address,
  64                               u8 byte)
  65 {
  66         struct mmc_command io_cmd;
  67         u32 arg;
  68 
  69         memset(&io_cmd, 0, sizeof(io_cmd));
  70         arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
  71         io_cmd.opcode = SD_IO_RW_DIRECT;
  72         io_cmd.arg = arg;
  73         io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
  74 
  75         return mmc_wait_for_cmd(card->host, &io_cmd, 0);
  76 }
  77 
  78 /**
  79  * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card.
  80  * @card: Pointer to the mmc_card.
  81  * @address: Address to read from.
  82  * @byte: Variable to store read value.
  83  *
  84  * Return: Read status.
  85  */
  86 static int rsi_cmd52readbyte(struct mmc_card *card,
  87                              u32 address,
  88                              u8 *byte)
  89 {
  90         struct mmc_command io_cmd;
  91         u32 arg;
  92         int err;
  93 
  94         memset(&io_cmd, 0, sizeof(io_cmd));
  95         arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
  96         io_cmd.opcode = SD_IO_RW_DIRECT;
  97         io_cmd.arg = arg;
  98         io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
  99 
 100         err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
 101         if ((!err) && (byte))
 102                 *byte =  io_cmd.resp[0] & 0xFF;
 103         return err;
 104 }
 105 
 106 /**
 107  * rsi_issue_sdiocommand() - This function issues sdio commands.
 108  * @func: Pointer to the sdio_func structure.
 109  * @opcode: Opcode value.
 110  * @arg: Arguments to pass.
 111  * @flags: Flags which are set.
 112  * @resp: Pointer to store response.
 113  *
 114  * Return: err: command status as 0 or -1.
 115  */
 116 static int rsi_issue_sdiocommand(struct sdio_func *func,
 117                                  u32 opcode,
 118                                  u32 arg,
 119                                  u32 flags,
 120                                  u32 *resp)
 121 {
 122         struct mmc_command cmd;
 123         struct mmc_host *host;
 124         int err;
 125 
 126         host = func->card->host;
 127 
 128         memset(&cmd, 0, sizeof(struct mmc_command));
 129         cmd.opcode = opcode;
 130         cmd.arg = arg;
 131         cmd.flags = flags;
 132         err = mmc_wait_for_cmd(host, &cmd, 3);
 133 
 134         if ((!err) && (resp))
 135                 *resp = cmd.resp[0];
 136 
 137         return err;
 138 }
 139 
 140 /**
 141  * rsi_handle_interrupt() - This function is called upon the occurrence
 142  *                          of an interrupt.
 143  * @function: Pointer to the sdio_func structure.
 144  *
 145  * Return: None.
 146  */
 147 static void rsi_handle_interrupt(struct sdio_func *function)
 148 {
 149         struct rsi_hw *adapter = sdio_get_drvdata(function);
 150         struct rsi_91x_sdiodev *dev =
 151                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 152 
 153         if (adapter->priv->fsm_state == FSM_FW_NOT_LOADED)
 154                 return;
 155 
 156         dev->sdio_irq_task = current;
 157         rsi_interrupt_handler(adapter);
 158         dev->sdio_irq_task = NULL;
 159 }
 160 
 161 /**
 162  * rsi_reset_card() - This function resets and re-initializes the card.
 163  * @pfunction: Pointer to the sdio_func structure.
 164  *
 165  * Return: None.
 166  */
 167 static void rsi_reset_card(struct sdio_func *pfunction)
 168 {
 169         int ret = 0;
 170         int err;
 171         struct mmc_card *card = pfunction->card;
 172         struct mmc_host *host = card->host;
 173         u8 cmd52_resp;
 174         u32 clock, resp, i;
 175         u16 rca;
 176 
 177         /* Reset 9110 chip */
 178         ret = rsi_cmd52writebyte(pfunction->card,
 179                                  SDIO_CCCR_ABORT,
 180                                  (1 << 3));
 181 
 182         /* Card will not send any response as it is getting reset immediately
 183          * Hence expect a timeout status from host controller
 184          */
 185         if (ret != -ETIMEDOUT)
 186                 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
 187 
 188         /* Wait for few milli seconds to get rid of residue charges if any */
 189         msleep(20);
 190 
 191         /* Initialize the SDIO card */
 192         host->ios.chip_select = MMC_CS_DONTCARE;
 193         host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
 194         host->ios.power_mode = MMC_POWER_UP;
 195         host->ios.bus_width = MMC_BUS_WIDTH_1;
 196         host->ios.timing = MMC_TIMING_LEGACY;
 197         host->ops->set_ios(host, &host->ios);
 198 
 199         /*
 200          * This delay should be sufficient to allow the power supply
 201          * to reach the minimum voltage.
 202          */
 203         msleep(20);
 204 
 205         host->ios.clock = host->f_min;
 206         host->ios.power_mode = MMC_POWER_ON;
 207         host->ops->set_ios(host, &host->ios);
 208 
 209         /*
 210          * This delay must be at least 74 clock sizes, or 1 ms, or the
 211          * time required to reach a stable voltage.
 212          */
 213         msleep(20);
 214 
 215         /* Issue CMD0. Goto idle state */
 216         host->ios.chip_select = MMC_CS_HIGH;
 217         host->ops->set_ios(host, &host->ios);
 218         msleep(20);
 219         err = rsi_issue_sdiocommand(pfunction,
 220                                     MMC_GO_IDLE_STATE,
 221                                     0,
 222                                     (MMC_RSP_NONE | MMC_CMD_BC),
 223                                     NULL);
 224         host->ios.chip_select = MMC_CS_DONTCARE;
 225         host->ops->set_ios(host, &host->ios);
 226         msleep(20);
 227         host->use_spi_crc = 0;
 228 
 229         if (err)
 230                 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
 231 
 232         /* Issue CMD5, arg = 0 */
 233         err = rsi_issue_sdiocommand(pfunction,  SD_IO_SEND_OP_COND, 0,
 234                                     (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
 235         if (err)
 236                 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
 237                         __func__, err);
 238         card->ocr = resp;
 239         /* Issue CMD5, arg = ocr. Wait till card is ready  */
 240         for (i = 0; i < 100; i++) {
 241                 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND,
 242                                             card->ocr,
 243                                             (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
 244                 if (err) {
 245                         rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
 246                                 __func__, err);
 247                         break;
 248                 }
 249 
 250                 if (resp & MMC_CARD_BUSY)
 251                         break;
 252                 msleep(20);
 253         }
 254 
 255         if ((i == 100) || (err)) {
 256                 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
 257                         __func__, i, err);
 258                 return;
 259         }
 260 
 261         /* Issue CMD3, get RCA */
 262         err = rsi_issue_sdiocommand(pfunction,
 263                                     SD_SEND_RELATIVE_ADDR,
 264                                     0,
 265                                     (MMC_RSP_R6 | MMC_CMD_BCR),
 266                                     &resp);
 267         if (err) {
 268                 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
 269                 return;
 270         }
 271         rca = resp >> 16;
 272         host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
 273         host->ops->set_ios(host, &host->ios);
 274 
 275         /* Issue CMD7, select card  */
 276         err = rsi_issue_sdiocommand(pfunction,
 277                                     MMC_SELECT_CARD,
 278                                     (rca << 16),
 279                                     (MMC_RSP_R1 | MMC_CMD_AC),
 280                                     NULL);
 281         if (err) {
 282                 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
 283                 return;
 284         }
 285 
 286         /* Enable high speed */
 287         if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
 288                 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
 289                 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
 290                 if (err) {
 291                         rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
 292                                 __func__, err);
 293                 } else {
 294                         err = rsi_cmd52writebyte(card,
 295                                                  SDIO_CCCR_SPEED,
 296                                                  (cmd52_resp | SDIO_SPEED_EHS));
 297                         if (err) {
 298                                 rsi_dbg(ERR_ZONE,
 299                                         "%s: CCR speed regwrite failed %d\n",
 300                                         __func__, err);
 301                                 return;
 302                         }
 303                         host->ios.timing = MMC_TIMING_SD_HS;
 304                         host->ops->set_ios(host, &host->ios);
 305                 }
 306         }
 307 
 308         /* Set clock */
 309         if (mmc_card_hs(card))
 310                 clock = 50000000;
 311         else
 312                 clock = card->cis.max_dtr;
 313 
 314         if (clock > host->f_max)
 315                 clock = host->f_max;
 316 
 317         host->ios.clock = clock;
 318         host->ops->set_ios(host, &host->ios);
 319 
 320         if (card->host->caps & MMC_CAP_4_BIT_DATA) {
 321                 /* CMD52: Set bus width & disable card detect resistor */
 322                 err = rsi_cmd52writebyte(card,
 323                                          SDIO_CCCR_IF,
 324                                          (SDIO_BUS_CD_DISABLE |
 325                                           SDIO_BUS_WIDTH_4BIT));
 326                 if (err) {
 327                         rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
 328                                 __func__, err);
 329                         return;
 330                 }
 331                 host->ios.bus_width = MMC_BUS_WIDTH_4;
 332                 host->ops->set_ios(host, &host->ios);
 333         }
 334 }
 335 
 336 /**
 337  * rsi_setclock() - This function sets the clock frequency.
 338  * @adapter: Pointer to the adapter structure.
 339  * @freq: Clock frequency.
 340  *
 341  * Return: None.
 342  */
 343 static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
 344 {
 345         struct rsi_91x_sdiodev *dev =
 346                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 347         struct mmc_host *host = dev->pfunction->card->host;
 348         u32 clock;
 349 
 350         clock = freq * 1000;
 351         if (clock > host->f_max)
 352                 clock = host->f_max;
 353         host->ios.clock = clock;
 354         host->ops->set_ios(host, &host->ios);
 355 }
 356 
 357 /**
 358  * rsi_setblocklength() - This function sets the host block length.
 359  * @adapter: Pointer to the adapter structure.
 360  * @length: Block length to be set.
 361  *
 362  * Return: status: 0 on success, -1 on failure.
 363  */
 364 static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
 365 {
 366         struct rsi_91x_sdiodev *dev =
 367                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 368         int status;
 369         rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
 370 
 371         status = sdio_set_block_size(dev->pfunction, length);
 372         dev->pfunction->max_blksize = 256;
 373         adapter->block_size = dev->pfunction->max_blksize;
 374 
 375         rsi_dbg(INFO_ZONE,
 376                 "%s: Operational blk length is %d\n", __func__, length);
 377         return status;
 378 }
 379 
 380 /**
 381  * rsi_setupcard() - This function queries and sets the card's features.
 382  * @adapter: Pointer to the adapter structure.
 383  *
 384  * Return: status: 0 on success, -1 on failure.
 385  */
 386 static int rsi_setupcard(struct rsi_hw *adapter)
 387 {
 388         struct rsi_91x_sdiodev *dev =
 389                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 390         int status = 0;
 391 
 392         rsi_setclock(adapter, 50000);
 393 
 394         dev->tx_blk_size = 256;
 395         status = rsi_setblocklength(adapter, dev->tx_blk_size);
 396         if (status)
 397                 rsi_dbg(ERR_ZONE,
 398                         "%s: Unable to set block length\n", __func__);
 399         return status;
 400 }
 401 
 402 /**
 403  * rsi_sdio_read_register() - This function reads one byte of information
 404  *                            from a register.
 405  * @adapter: Pointer to the adapter structure.
 406  * @addr: Address of the register.
 407  * @data: Pointer to the data that stores the data read.
 408  *
 409  * Return: 0 on success, -1 on failure.
 410  */
 411 int rsi_sdio_read_register(struct rsi_hw *adapter,
 412                            u32 addr,
 413                            u8 *data)
 414 {
 415         struct rsi_91x_sdiodev *dev =
 416                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 417         u8 fun_num = 0;
 418         int status;
 419 
 420         if (likely(dev->sdio_irq_task != current))
 421                 sdio_claim_host(dev->pfunction);
 422 
 423         if (fun_num == 0)
 424                 *data = sdio_f0_readb(dev->pfunction, addr, &status);
 425         else
 426                 *data = sdio_readb(dev->pfunction, addr, &status);
 427 
 428         if (likely(dev->sdio_irq_task != current))
 429                 sdio_release_host(dev->pfunction);
 430 
 431         return status;
 432 }
 433 
 434 /**
 435  * rsi_sdio_write_register() - This function writes one byte of information
 436  *                             into a register.
 437  * @adapter: Pointer to the adapter structure.
 438  * @function: Function Number.
 439  * @addr: Address of the register.
 440  * @data: Pointer to the data tha has to be written.
 441  *
 442  * Return: 0 on success, -1 on failure.
 443  */
 444 int rsi_sdio_write_register(struct rsi_hw *adapter,
 445                             u8 function,
 446                             u32 addr,
 447                             u8 *data)
 448 {
 449         struct rsi_91x_sdiodev *dev =
 450                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 451         int status = 0;
 452 
 453         if (likely(dev->sdio_irq_task != current))
 454                 sdio_claim_host(dev->pfunction);
 455 
 456         if (function == 0)
 457                 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
 458         else
 459                 sdio_writeb(dev->pfunction, *data, addr, &status);
 460 
 461         if (likely(dev->sdio_irq_task != current))
 462                 sdio_release_host(dev->pfunction);
 463 
 464         return status;
 465 }
 466 
 467 /**
 468  * rsi_sdio_ack_intr() - This function acks the interrupt received.
 469  * @adapter: Pointer to the adapter structure.
 470  * @int_bit: Interrupt bit to write into register.
 471  *
 472  * Return: None.
 473  */
 474 void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
 475 {
 476         int status;
 477         status = rsi_sdio_write_register(adapter,
 478                                          1,
 479                                          (SDIO_FUN1_INTR_CLR_REG |
 480                                           RSI_SD_REQUEST_MASTER),
 481                                          &int_bit);
 482         if (status)
 483                 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
 484 }
 485 
 486 
 487 
 488 /**
 489  * rsi_sdio_read_register_multiple() - This function read multiple bytes of
 490  *                                     information from the SD card.
 491  * @adapter: Pointer to the adapter structure.
 492  * @addr: Address of the register.
 493  * @count: Number of multiple bytes to be read.
 494  * @data: Pointer to the read data.
 495  *
 496  * Return: 0 on success, -1 on failure.
 497  */
 498 static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
 499                                            u32 addr,
 500                                            u8 *data,
 501                                            u16 count)
 502 {
 503         struct rsi_91x_sdiodev *dev =
 504                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 505         u32 status;
 506 
 507         if (likely(dev->sdio_irq_task != current))
 508                 sdio_claim_host(dev->pfunction);
 509 
 510         status =  sdio_readsb(dev->pfunction, data, addr, count);
 511 
 512         if (likely(dev->sdio_irq_task != current))
 513                 sdio_release_host(dev->pfunction);
 514 
 515         if (status != 0)
 516                 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
 517         return status;
 518 }
 519 
 520 /**
 521  * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
 522  *                                      information to the SD card.
 523  * @adapter: Pointer to the adapter structure.
 524  * @addr: Address of the register.
 525  * @data: Pointer to the data that has to be written.
 526  * @count: Number of multiple bytes to be written.
 527  *
 528  * Return: 0 on success, -1 on failure.
 529  */
 530 int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
 531                                      u32 addr,
 532                                      u8 *data,
 533                                      u16 count)
 534 {
 535         struct rsi_91x_sdiodev *dev =
 536                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 537         int status;
 538 
 539         if (dev->write_fail > 1) {
 540                 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
 541                 return 0;
 542         } else if (dev->write_fail == 1) {
 543                 /**
 544                  * Assuming it is a CRC failure, we want to allow another
 545                  *  card write
 546                  */
 547                 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
 548                 dev->write_fail++;
 549         }
 550 
 551         if (likely(dev->sdio_irq_task != current))
 552                 sdio_claim_host(dev->pfunction);
 553 
 554         status = sdio_writesb(dev->pfunction, addr, data, count);
 555 
 556         if (likely(dev->sdio_irq_task != current))
 557                 sdio_release_host(dev->pfunction);
 558 
 559         if (status) {
 560                 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
 561                         __func__, status);
 562                 dev->write_fail = 2;
 563         } else {
 564                 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
 565         }
 566         return status;
 567 }
 568 
 569 static int rsi_sdio_load_data_master_write(struct rsi_hw *adapter,
 570                                            u32 base_address,
 571                                            u32 instructions_sz,
 572                                            u16 block_size,
 573                                            u8 *ta_firmware)
 574 {
 575         u32 num_blocks, offset, i;
 576         u16 msb_address, lsb_address;
 577         u8 *temp_buf;
 578         int status;
 579 
 580         num_blocks = instructions_sz / block_size;
 581         msb_address = base_address >> 16;
 582 
 583         rsi_dbg(INFO_ZONE, "ins_size: %d, num_blocks: %d\n",
 584                 instructions_sz, num_blocks);
 585 
 586         temp_buf = kmalloc(block_size, GFP_KERNEL);
 587         if (!temp_buf)
 588                 return -ENOMEM;
 589 
 590         /* Loading DM ms word in the sdio slave */
 591         status = rsi_sdio_master_access_msword(adapter, msb_address);
 592         if (status < 0) {
 593                 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
 594                 goto out_free;
 595         }
 596 
 597         for (offset = 0, i = 0; i < num_blocks; i++, offset += block_size) {
 598                 memcpy(temp_buf, ta_firmware + offset, block_size);
 599                 lsb_address = (u16)base_address;
 600                 status = rsi_sdio_write_register_multiple
 601                                         (adapter,
 602                                          lsb_address | RSI_SD_REQUEST_MASTER,
 603                                          temp_buf, block_size);
 604                 if (status < 0) {
 605                         rsi_dbg(ERR_ZONE, "%s: failed to write\n", __func__);
 606                         goto out_free;
 607                 }
 608                 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
 609                 base_address += block_size;
 610 
 611                 if ((base_address >> 16) != msb_address) {
 612                         msb_address += 1;
 613 
 614                         /* Loading DM ms word in the sdio slave */
 615                         status = rsi_sdio_master_access_msword(adapter,
 616                                                                msb_address);
 617                         if (status < 0) {
 618                                 rsi_dbg(ERR_ZONE,
 619                                         "%s: Unable to set ms word reg\n",
 620                                         __func__);
 621                                 goto out_free;
 622                         }
 623                 }
 624         }
 625 
 626         if (instructions_sz % block_size) {
 627                 memset(temp_buf, 0, block_size);
 628                 memcpy(temp_buf, ta_firmware + offset,
 629                        instructions_sz % block_size);
 630                 lsb_address = (u16)base_address;
 631                 status = rsi_sdio_write_register_multiple
 632                                         (adapter,
 633                                          lsb_address | RSI_SD_REQUEST_MASTER,
 634                                          temp_buf,
 635                                          instructions_sz % block_size);
 636                 if (status < 0)
 637                         goto out_free;
 638                 rsi_dbg(INFO_ZONE,
 639                         "Written Last Block in Address 0x%x Successfully\n",
 640                         offset | RSI_SD_REQUEST_MASTER);
 641         }
 642 
 643         status = 0;
 644 out_free:
 645         kfree(temp_buf);
 646         return status;
 647 }
 648 
 649 #define FLASH_SIZE_ADDR                 0x04000016
 650 static int rsi_sdio_master_reg_read(struct rsi_hw *adapter, u32 addr,
 651                                     u32 *read_buf, u16 size)
 652 {
 653         u32 addr_on_bus, *data;
 654         u16 ms_addr;
 655         int status;
 656 
 657         data = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
 658         if (!data)
 659                 return -ENOMEM;
 660 
 661         ms_addr = (addr >> 16);
 662         status = rsi_sdio_master_access_msword(adapter, ms_addr);
 663         if (status < 0) {
 664                 rsi_dbg(ERR_ZONE,
 665                         "%s: Unable to set ms word to common reg\n",
 666                         __func__);
 667                 goto err;
 668         }
 669         addr &= 0xFFFF;
 670 
 671         addr_on_bus = (addr & 0xFF000000);
 672         if ((addr_on_bus == (FLASH_SIZE_ADDR & 0xFF000000)) ||
 673             (addr_on_bus == 0x0))
 674                 addr_on_bus = (addr & ~(0x3));
 675         else
 676                 addr_on_bus = addr;
 677 
 678         /* Bring TA out of reset */
 679         status = rsi_sdio_read_register_multiple
 680                                         (adapter,
 681                                          (addr_on_bus | RSI_SD_REQUEST_MASTER),
 682                                          (u8 *)data, 4);
 683         if (status < 0) {
 684                 rsi_dbg(ERR_ZONE, "%s: AHB register read failed\n", __func__);
 685                 goto err;
 686         }
 687         if (size == 2) {
 688                 if ((addr & 0x3) == 0)
 689                         *read_buf = *data;
 690                 else
 691                         *read_buf  = (*data >> 16);
 692                 *read_buf = (*read_buf & 0xFFFF);
 693         } else if (size == 1) {
 694                 if ((addr & 0x3) == 0)
 695                         *read_buf = *data;
 696                 else if ((addr & 0x3) == 1)
 697                         *read_buf = (*data >> 8);
 698                 else if ((addr & 0x3) == 2)
 699                         *read_buf = (*data >> 16);
 700                 else
 701                         *read_buf = (*data >> 24);
 702                 *read_buf = (*read_buf & 0xFF);
 703         } else {
 704                 *read_buf = *data;
 705         }
 706 
 707 err:
 708         kfree(data);
 709         return status;
 710 }
 711 
 712 static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,
 713                                      unsigned long addr,
 714                                      unsigned long data, u16 size)
 715 {
 716         unsigned long *data_aligned;
 717         int status;
 718 
 719         data_aligned = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
 720         if (!data_aligned)
 721                 return -ENOMEM;
 722 
 723         if (size == 2) {
 724                 *data_aligned = ((data << 16) | (data & 0xFFFF));
 725         } else if (size == 1) {
 726                 u32 temp_data = data & 0xFF;
 727 
 728                 *data_aligned = ((temp_data << 24) | (temp_data << 16) |
 729                                  (temp_data << 8) | temp_data);
 730         } else {
 731                 *data_aligned = data;
 732         }
 733         size = 4;
 734 
 735         status = rsi_sdio_master_access_msword(adapter, (addr >> 16));
 736         if (status < 0) {
 737                 rsi_dbg(ERR_ZONE,
 738                         "%s: Unable to set ms word to common reg\n",
 739                         __func__);
 740                 kfree(data_aligned);
 741                 return -EIO;
 742         }
 743         addr = addr & 0xFFFF;
 744 
 745         /* Bring TA out of reset */
 746         status = rsi_sdio_write_register_multiple
 747                                         (adapter,
 748                                          (addr | RSI_SD_REQUEST_MASTER),
 749                                          (u8 *)data_aligned, size);
 750         if (status < 0)
 751                 rsi_dbg(ERR_ZONE,
 752                         "%s: Unable to do AHB reg write\n", __func__);
 753 
 754         kfree(data_aligned);
 755         return status;
 756 }
 757 
 758 /**
 759  * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.
 760  * @adapter: Pointer to the adapter structure.
 761  * @pkt: Pointer to the data to be written on to the device.
 762  * @len: length of the data to be written on to the device.
 763  *
 764  * Return: 0 on success, -1 on failure.
 765  */
 766 static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
 767                                         u8 *pkt,
 768                                         u32 len)
 769 {
 770         struct rsi_91x_sdiodev *dev =
 771                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
 772         u32 block_size = dev->tx_blk_size;
 773         u32 num_blocks, address, length;
 774         u32 queueno;
 775         int status;
 776 
 777         queueno = ((pkt[1] >> 4) & 0xf);
 778         if (queueno == RSI_BT_MGMT_Q || queueno == RSI_BT_DATA_Q)
 779                 queueno = RSI_BT_Q;
 780 
 781         num_blocks = len / block_size;
 782 
 783         if (len % block_size)
 784                 num_blocks++;
 785 
 786         address = (num_blocks * block_size | (queueno << 12));
 787         length  = num_blocks * block_size;
 788 
 789         status = rsi_sdio_write_register_multiple(adapter,
 790                                                   address,
 791                                                   (u8 *)pkt,
 792                                                   length);
 793         if (status)
 794                 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
 795                         __func__, status);
 796         rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
 797         return status;
 798 }
 799 
 800 /**
 801  * rsi_sdio_host_intf_read_pkt() - This function reads the packet
 802                                    from the device.
 803  * @adapter: Pointer to the adapter data structure.
 804  * @pkt: Pointer to the packet data to be read from the the device.
 805  * @length: Length of the data to be read from the device.
 806  *
 807  * Return: 0 on success, -1 on failure.
 808  */
 809 int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
 810                                 u8 *pkt,
 811                                 u32 length)
 812 {
 813         int status = -EINVAL;
 814 
 815         if (!length) {
 816                 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
 817                 return status;
 818         }
 819 
 820         status = rsi_sdio_read_register_multiple(adapter,
 821                                                  length,
 822                                                  (u8 *)pkt,
 823                                                  length); /*num of bytes*/
 824 
 825         if (status)
 826                 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
 827                         status);
 828         return status;
 829 }
 830 
 831 /**
 832  * rsi_init_sdio_interface() - This function does init specific to SDIO.
 833  *
 834  * @adapter: Pointer to the adapter data structure.
 835  * @pkt: Pointer to the packet data to be read from the the device.
 836  *
 837  * Return: 0 on success, -1 on failure.
 838  */
 839 
 840 static int rsi_init_sdio_interface(struct rsi_hw *adapter,
 841                                    struct sdio_func *pfunction)
 842 {
 843         struct rsi_91x_sdiodev *rsi_91x_dev;
 844         int status;
 845 
 846         rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
 847         if (!rsi_91x_dev)
 848                 return -ENOMEM;
 849 
 850         adapter->rsi_dev = rsi_91x_dev;
 851 
 852         sdio_claim_host(pfunction);
 853 
 854         pfunction->enable_timeout = 100;
 855         status = sdio_enable_func(pfunction);
 856         if (status) {
 857                 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
 858                 sdio_release_host(pfunction);
 859                 return status;
 860         }
 861 
 862         rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
 863 
 864         rsi_91x_dev->pfunction = pfunction;
 865         adapter->device = &pfunction->dev;
 866 
 867         sdio_set_drvdata(pfunction, adapter);
 868 
 869         status = rsi_setupcard(adapter);
 870         if (status) {
 871                 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
 872                 goto fail;
 873         }
 874 
 875         rsi_dbg(INIT_ZONE, "%s: Setup card successfully\n", __func__);
 876 
 877         status = rsi_init_sdio_slave_regs(adapter);
 878         if (status) {
 879                 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
 880                 goto fail;
 881         }
 882         sdio_release_host(pfunction);
 883 
 884         adapter->determine_event_timeout = rsi_sdio_determine_event_timeout;
 885         adapter->check_hw_queue_status = rsi_sdio_check_buffer_status;
 886 
 887 #ifdef CONFIG_RSI_DEBUGFS
 888         adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES;
 889 #endif
 890         return 0;
 891 fail:
 892         sdio_disable_func(pfunction);
 893         sdio_release_host(pfunction);
 894         return status;
 895 }
 896 
 897 static int rsi_sdio_reinit_device(struct rsi_hw *adapter)
 898 {
 899         struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
 900         struct sdio_func *pfunction = sdev->pfunction;
 901         int ii;
 902 
 903         for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
 904                 skb_queue_purge(&adapter->priv->tx_queue[ii]);
 905 
 906         /* Initialize device again */
 907         sdio_claim_host(pfunction);
 908 
 909         sdio_release_irq(pfunction);
 910         rsi_reset_card(pfunction);
 911 
 912         sdio_enable_func(pfunction);
 913         rsi_setupcard(adapter);
 914         rsi_init_sdio_slave_regs(adapter);
 915         sdio_claim_irq(pfunction, rsi_handle_interrupt);
 916         rsi_hal_device_init(adapter);
 917 
 918         sdio_release_host(pfunction);
 919 
 920         return 0;
 921 }
 922 
 923 static int rsi_sdio_ta_reset(struct rsi_hw *adapter)
 924 {
 925         int status;
 926         u32 addr;
 927         u8 *data;
 928 
 929         data = kzalloc(RSI_9116_REG_SIZE, GFP_KERNEL);
 930         if (!data)
 931                 return -ENOMEM;
 932 
 933         status = rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR);
 934         if (status < 0) {
 935                 rsi_dbg(ERR_ZONE,
 936                         "Unable to set ms word to common reg\n");
 937                 goto err;
 938         }
 939 
 940         rsi_dbg(INIT_ZONE, "%s: Bring TA out of reset\n", __func__);
 941         put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
 942         addr = TA_HOLD_THREAD_REG | RSI_SD_REQUEST_MASTER;
 943         status = rsi_sdio_write_register_multiple(adapter, addr,
 944                                                   (u8 *)data,
 945                                                   RSI_9116_REG_SIZE);
 946         if (status < 0) {
 947                 rsi_dbg(ERR_ZONE, "Unable to hold TA threads\n");
 948                 goto err;
 949         }
 950 
 951         put_unaligned_le32(TA_SOFT_RST_CLR, data);
 952         addr = TA_SOFT_RESET_REG | RSI_SD_REQUEST_MASTER;
 953         status = rsi_sdio_write_register_multiple(adapter, addr,
 954                                                   (u8 *)data,
 955                                                   RSI_9116_REG_SIZE);
 956         if (status < 0) {
 957                 rsi_dbg(ERR_ZONE, "Unable to get TA out of reset\n");
 958                 goto err;
 959         }
 960 
 961         put_unaligned_le32(TA_PC_ZERO, data);
 962         addr = TA_TH0_PC_REG | RSI_SD_REQUEST_MASTER;
 963         status = rsi_sdio_write_register_multiple(adapter, addr,
 964                                                   (u8 *)data,
 965                                                   RSI_9116_REG_SIZE);
 966         if (status < 0) {
 967                 rsi_dbg(ERR_ZONE, "Unable to Reset TA PC value\n");
 968                 status = -EINVAL;
 969                 goto err;
 970         }
 971 
 972         put_unaligned_le32(TA_RELEASE_THREAD_VALUE, data);
 973         addr = TA_RELEASE_THREAD_REG | RSI_SD_REQUEST_MASTER;
 974         status = rsi_sdio_write_register_multiple(adapter, addr,
 975                                                   (u8 *)data,
 976                                                   RSI_9116_REG_SIZE);
 977         if (status < 0) {
 978                 rsi_dbg(ERR_ZONE, "Unable to release TA threads\n");
 979                 goto err;
 980         }
 981 
 982         status = rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR);
 983         if (status < 0) {
 984                 rsi_dbg(ERR_ZONE, "Unable to set ms word to common reg\n");
 985                 goto err;
 986         }
 987         rsi_dbg(INIT_ZONE, "***** TA Reset done *****\n");
 988 
 989 err:
 990         kfree(data);
 991         return status;
 992 }
 993 
 994 static struct rsi_host_intf_ops sdio_host_intf_ops = {
 995         .write_pkt              = rsi_sdio_host_intf_write_pkt,
 996         .read_pkt               = rsi_sdio_host_intf_read_pkt,
 997         .master_access_msword   = rsi_sdio_master_access_msword,
 998         .read_reg_multiple      = rsi_sdio_read_register_multiple,
 999         .write_reg_multiple     = rsi_sdio_write_register_multiple,
1000         .master_reg_read        = rsi_sdio_master_reg_read,
1001         .master_reg_write       = rsi_sdio_master_reg_write,
1002         .load_data_master_write = rsi_sdio_load_data_master_write,
1003         .reinit_device          = rsi_sdio_reinit_device,
1004         .ta_reset               = rsi_sdio_ta_reset,
1005 };
1006 
1007 /**
1008  * rsi_probe() - This function is called by kernel when the driver provided
1009  *               Vendor and device IDs are matched. All the initialization
1010  *               work is done here.
1011  * @pfunction: Pointer to the sdio_func structure.
1012  * @id: Pointer to sdio_device_id structure.
1013  *
1014  * Return: 0 on success, 1 on failure.
1015  */
1016 static int rsi_probe(struct sdio_func *pfunction,
1017                      const struct sdio_device_id *id)
1018 {
1019         struct rsi_hw *adapter;
1020         struct rsi_91x_sdiodev *sdev;
1021         int status = -EINVAL;
1022 
1023         rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
1024 
1025         adapter = rsi_91x_init(dev_oper_mode);
1026         if (!adapter) {
1027                 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
1028                         __func__);
1029                 return -EINVAL;
1030         }
1031         adapter->rsi_host_intf = RSI_HOST_INTF_SDIO;
1032         adapter->host_intf_ops = &sdio_host_intf_ops;
1033 
1034         if (rsi_init_sdio_interface(adapter, pfunction)) {
1035                 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
1036                         __func__);
1037                 status = -EIO;
1038                 goto fail_free_adapter;
1039         }
1040 
1041         if (pfunction->device == RSI_SDIO_PID_9113) {
1042                 rsi_dbg(ERR_ZONE, "%s: 9113 module detected\n", __func__);
1043                 adapter->device_model = RSI_DEV_9113;
1044         } else  if (pfunction->device == RSI_SDIO_PID_9116) {
1045                 rsi_dbg(ERR_ZONE, "%s: 9116 module detected\n", __func__);
1046                 adapter->device_model = RSI_DEV_9116;
1047         } else {
1048                 rsi_dbg(ERR_ZONE,
1049                         "%s: Unsupported RSI device id 0x%x\n", __func__,
1050                         pfunction->device);
1051                 goto fail_free_adapter;
1052         }
1053 
1054         sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1055         rsi_init_event(&sdev->rx_thread.event);
1056         status = rsi_create_kthread(adapter->priv, &sdev->rx_thread,
1057                                     rsi_sdio_rx_thread, "SDIO-RX-Thread");
1058         if (status) {
1059                 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
1060                 goto fail_kill_thread;
1061         }
1062         skb_queue_head_init(&sdev->rx_q.head);
1063         sdev->rx_q.num_rx_pkts = 0;
1064 
1065         sdio_claim_host(pfunction);
1066         if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
1067                 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
1068                 sdio_release_host(pfunction);
1069                 status = -EIO;
1070                 goto fail_claim_irq;
1071         }
1072         sdio_release_host(pfunction);
1073         rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
1074 
1075         if (rsi_hal_device_init(adapter)) {
1076                 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
1077                 status = -EINVAL;
1078                 goto fail_dev_init;
1079         }
1080         rsi_dbg(INFO_ZONE, "===> RSI Device Init Done <===\n");
1081 
1082         if (rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR)) {
1083                 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
1084                 status = -EIO;
1085                 goto fail_dev_init;
1086         }
1087 
1088         adapter->priv->hibernate_resume = false;
1089         adapter->priv->reinit_hw = false;
1090         return 0;
1091 
1092 fail_dev_init:
1093         sdio_claim_host(pfunction);
1094         sdio_release_irq(pfunction);
1095         sdio_release_host(pfunction);
1096 fail_claim_irq:
1097         rsi_kill_thread(&sdev->rx_thread);
1098 fail_kill_thread:
1099         sdio_claim_host(pfunction);
1100         sdio_disable_func(pfunction);
1101         sdio_release_host(pfunction);
1102 fail_free_adapter:
1103         rsi_91x_deinit(adapter);
1104         rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
1105         return status;
1106 }
1107 
1108 static void ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
1109                            u16 len_in_bits)
1110 {
1111         rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG1,
1112                                   ((addr << 6) | ((data >> 16) & 0xffff)), 2);
1113         rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
1114                                   (data & 0xffff), 2);
1115         rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
1116                                   RSI_GSPI_CTRL_REG0_VALUE, 2);
1117         rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
1118                                   ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
1119         msleep(20);
1120 }
1121 
1122 /*This function resets and re-initializes the chip.*/
1123 static void rsi_reset_chip(struct rsi_hw *adapter)
1124 {
1125         u8 *data;
1126         u8 sdio_interrupt_status = 0;
1127         u8 request = 1;
1128         int ret;
1129 
1130         data = kzalloc(sizeof(u32), GFP_KERNEL);
1131         if (!data)
1132                 return;
1133 
1134         rsi_dbg(INFO_ZONE, "Writing disable to wakeup register\n");
1135         ret =  rsi_sdio_write_register(adapter, 0, SDIO_WAKEUP_REG, &request);
1136         if (ret < 0) {
1137                 rsi_dbg(ERR_ZONE,
1138                         "%s: Failed to write SDIO wakeup register\n", __func__);
1139                 goto err;
1140         }
1141         msleep(20);
1142         ret =  rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1143                                       &sdio_interrupt_status);
1144         if (ret < 0) {
1145                 rsi_dbg(ERR_ZONE, "%s: Failed to Read Intr Status Register\n",
1146                         __func__);
1147                 goto err;
1148         }
1149         rsi_dbg(INFO_ZONE, "%s: Intr Status Register value = %d\n",
1150                 __func__, sdio_interrupt_status);
1151 
1152         /* Put Thread-Arch processor on hold */
1153         if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
1154                 rsi_dbg(ERR_ZONE,
1155                         "%s: Unable to set ms word to common reg\n",
1156                         __func__);
1157                 goto err;
1158         }
1159 
1160         put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
1161         if (rsi_sdio_write_register_multiple(adapter, TA_HOLD_THREAD_REG |
1162                                              RSI_SD_REQUEST_MASTER,
1163                                              data, 4)) {
1164                 rsi_dbg(ERR_ZONE,
1165                         "%s: Unable to hold Thread-Arch processor threads\n",
1166                         __func__);
1167                 goto err;
1168         }
1169 
1170         /* This msleep will ensure Thread-Arch processor to go to hold
1171          * and any pending dma transfers to rf spi in device to finish.
1172          */
1173         msleep(100);
1174         if (adapter->device_model != RSI_DEV_9116) {
1175                 ulp_read_write(adapter, RSI_ULP_RESET_REG, RSI_ULP_WRITE_0, 32);
1176                 ulp_read_write(adapter,
1177                                RSI_WATCH_DOG_TIMER_1, RSI_ULP_WRITE_2, 32);
1178                 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, RSI_ULP_WRITE_0,
1179                                32);
1180                 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
1181                                RSI_ULP_WRITE_50, 32);
1182                 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
1183                                RSI_ULP_WRITE_0, 32);
1184                 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
1185                                RSI_ULP_TIMER_ENABLE, 32);
1186         } else {
1187                 if ((rsi_sdio_master_reg_write(adapter,
1188                                                NWP_WWD_INTERRUPT_TIMER,
1189                                                NWP_WWD_INT_TIMER_CLKS,
1190                                                RSI_9116_REG_SIZE)) < 0) {
1191                         rsi_dbg(ERR_ZONE, "Failed to write to intr timer\n");
1192                 }
1193                 if ((rsi_sdio_master_reg_write(adapter,
1194                                                NWP_WWD_SYSTEM_RESET_TIMER,
1195                                                NWP_WWD_SYS_RESET_TIMER_CLKS,
1196                                                RSI_9116_REG_SIZE)) < 0) {
1197                         rsi_dbg(ERR_ZONE,
1198                                 "Failed to write to system reset timer\n");
1199                 }
1200                 if ((rsi_sdio_master_reg_write(adapter,
1201                                                NWP_WWD_MODE_AND_RSTART,
1202                                                NWP_WWD_TIMER_DISABLE,
1203                                                RSI_9116_REG_SIZE)) < 0) {
1204                         rsi_dbg(ERR_ZONE,
1205                                 "Failed to write to mode and restart\n");
1206                 }
1207                 rsi_dbg(ERR_ZONE, "***** Watch Dog Reset Successful *****\n");
1208         }
1209         /* This msleep will be sufficient for the ulp
1210          * read write operations to complete for chip reset.
1211          */
1212         msleep(500);
1213 err:
1214         kfree(data);
1215         return;
1216 }
1217 
1218 /**
1219  * rsi_disconnect() - This function performs the reverse of the probe function.
1220  * @pfunction: Pointer to the sdio_func structure.
1221  *
1222  * Return: void.
1223  */
1224 static void rsi_disconnect(struct sdio_func *pfunction)
1225 {
1226         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1227         struct rsi_91x_sdiodev *dev;
1228 
1229         if (!adapter)
1230                 return;
1231 
1232         dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1233 
1234         rsi_kill_thread(&dev->rx_thread);
1235         sdio_claim_host(pfunction);
1236         sdio_release_irq(pfunction);
1237         sdio_release_host(pfunction);
1238         mdelay(10);
1239 
1240         rsi_mac80211_detach(adapter);
1241         mdelay(10);
1242 
1243         if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1244             adapter->priv->bt_adapter) {
1245                 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1246                 adapter->priv->bt_adapter = NULL;
1247         }
1248 
1249         /* Reset Chip */
1250         rsi_reset_chip(adapter);
1251 
1252         /* Resetting to take care of the case, where-in driver is re-loaded */
1253         sdio_claim_host(pfunction);
1254         rsi_reset_card(pfunction);
1255         sdio_disable_func(pfunction);
1256         sdio_release_host(pfunction);
1257         dev->write_fail = 2;
1258         rsi_91x_deinit(adapter);
1259         rsi_dbg(ERR_ZONE, "##### RSI SDIO device disconnected #####\n");
1260 
1261 }
1262 
1263 #ifdef CONFIG_PM
1264 static int rsi_set_sdio_pm_caps(struct rsi_hw *adapter)
1265 {
1266         struct rsi_91x_sdiodev *dev =
1267                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1268         struct sdio_func *func = dev->pfunction;
1269         int ret;
1270 
1271         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1272         if (ret)
1273                 rsi_dbg(ERR_ZONE, "Set sdio keep pwr flag failed: %d\n", ret);
1274 
1275         return ret;
1276 }
1277 
1278 static int rsi_sdio_disable_interrupts(struct sdio_func *pfunc)
1279 {
1280         struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1281         u8 isr_status = 0, data = 0;
1282         int ret;
1283         unsigned long t1;
1284 
1285         rsi_dbg(INFO_ZONE, "Waiting for interrupts to be cleared..");
1286         t1 = jiffies;
1287         do {
1288                 rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1289                                        &isr_status);
1290                 rsi_dbg(INFO_ZONE, ".");
1291         } while ((isr_status) && (jiffies_to_msecs(jiffies - t1) < 20));
1292         rsi_dbg(INFO_ZONE, "Interrupts cleared\n");
1293 
1294         sdio_claim_host(pfunc);
1295         ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1296         if (ret < 0) {
1297                 rsi_dbg(ERR_ZONE,
1298                         "%s: Failed to read int enable register\n",
1299                         __func__);
1300                 goto done;
1301         }
1302 
1303         data &= RSI_INT_ENABLE_MASK;
1304         ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1305         if (ret < 0) {
1306                 rsi_dbg(ERR_ZONE,
1307                         "%s: Failed to write to int enable register\n",
1308                         __func__);
1309                 goto done;
1310         }
1311         ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1312         if (ret < 0) {
1313                 rsi_dbg(ERR_ZONE,
1314                         "%s: Failed to read int enable register\n",
1315                         __func__);
1316                 goto done;
1317         }
1318         rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1319 
1320 done:
1321         sdio_release_host(pfunc);
1322         return ret;
1323 }
1324 
1325 static int rsi_sdio_enable_interrupts(struct sdio_func *pfunc)
1326 {
1327         u8 data;
1328         int ret;
1329         struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1330         struct rsi_common *common = adapter->priv;
1331 
1332         sdio_claim_host(pfunc);
1333         ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1334         if (ret < 0) {
1335                 rsi_dbg(ERR_ZONE,
1336                         "%s: Failed to read int enable register\n", __func__);
1337                 goto done;
1338         }
1339 
1340         data |= ~RSI_INT_ENABLE_MASK & 0xff;
1341 
1342         ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1343         if (ret < 0) {
1344                 rsi_dbg(ERR_ZONE,
1345                         "%s: Failed to write to int enable register\n",
1346                         __func__);
1347                 goto done;
1348         }
1349 
1350         if ((common->wow_flags & RSI_WOW_ENABLED) &&
1351             (common->wow_flags & RSI_WOW_NO_CONNECTION))
1352                 rsi_dbg(ERR_ZONE,
1353                         "##### Device can not wake up through WLAN\n");
1354 
1355         ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1356         if (ret < 0) {
1357                 rsi_dbg(ERR_ZONE,
1358                         "%s: Failed to read int enable register\n", __func__);
1359                 goto done;
1360         }
1361         rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1362 
1363 done:
1364         sdio_release_host(pfunc);
1365         return ret;
1366 }
1367 
1368 static int rsi_suspend(struct device *dev)
1369 {
1370         int ret;
1371         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1372         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1373         struct rsi_common *common;
1374 
1375         if (!adapter) {
1376                 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1377                 return -ENODEV;
1378         }
1379         common = adapter->priv;
1380         rsi_sdio_disable_interrupts(pfunction);
1381 
1382         ret = rsi_set_sdio_pm_caps(adapter);
1383         if (ret)
1384                 rsi_dbg(INFO_ZONE,
1385                         "Setting power management caps failed\n");
1386         common->fsm_state = FSM_CARD_NOT_READY;
1387 
1388         return 0;
1389 }
1390 
1391 static int rsi_resume(struct device *dev)
1392 {
1393         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1394         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1395         struct rsi_common *common = adapter->priv;
1396 
1397         common->fsm_state = FSM_MAC_INIT_DONE;
1398         rsi_sdio_enable_interrupts(pfunction);
1399 
1400         return 0;
1401 }
1402 
1403 static int rsi_freeze(struct device *dev)
1404 {
1405         int ret;
1406         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1407         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1408         struct rsi_common *common;
1409         struct rsi_91x_sdiodev *sdev;
1410 
1411         rsi_dbg(INFO_ZONE, "SDIO Bus freeze ===>\n");
1412 
1413         if (!adapter) {
1414                 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1415                 return -ENODEV;
1416         }
1417         common = adapter->priv;
1418         sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1419 
1420         if ((common->wow_flags & RSI_WOW_ENABLED) &&
1421             (common->wow_flags & RSI_WOW_NO_CONNECTION))
1422                 rsi_dbg(ERR_ZONE,
1423                         "##### Device can not wake up through WLAN\n");
1424 
1425         if (IS_ENABLED(CONFIG_RSI_COEX) && common->coex_mode > 1 &&
1426             common->bt_adapter) {
1427                 rsi_bt_ops.detach(common->bt_adapter);
1428                 common->bt_adapter = NULL;
1429         }
1430 
1431         ret = rsi_sdio_disable_interrupts(pfunction);
1432 
1433         if (sdev->write_fail)
1434                 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1435 
1436         ret = rsi_set_sdio_pm_caps(adapter);
1437         if (ret)
1438                 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1439 
1440         rsi_dbg(INFO_ZONE, "***** RSI module freezed *****\n");
1441 
1442         return 0;
1443 }
1444 
1445 static int rsi_thaw(struct device *dev)
1446 {
1447         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1448         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1449         struct rsi_common *common = adapter->priv;
1450 
1451         rsi_dbg(ERR_ZONE, "SDIO Bus thaw =====>\n");
1452 
1453         common->hibernate_resume = true;
1454         common->fsm_state = FSM_CARD_NOT_READY;
1455         common->iface_down = true;
1456 
1457         rsi_sdio_enable_interrupts(pfunction);
1458 
1459         rsi_dbg(INFO_ZONE, "***** RSI module thaw done *****\n");
1460 
1461         return 0;
1462 }
1463 
1464 static void rsi_shutdown(struct device *dev)
1465 {
1466         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1467         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1468         struct rsi_91x_sdiodev *sdev =
1469                 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1470         struct ieee80211_hw *hw = adapter->hw;
1471         struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
1472 
1473         rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n");
1474 
1475         if (rsi_config_wowlan(adapter, wowlan))
1476                 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1477 
1478         if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1479             adapter->priv->bt_adapter) {
1480                 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1481                 adapter->priv->bt_adapter = NULL;
1482         }
1483 
1484         rsi_sdio_disable_interrupts(sdev->pfunction);
1485 
1486         if (sdev->write_fail)
1487                 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1488 
1489         if (rsi_set_sdio_pm_caps(adapter))
1490                 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1491 
1492         rsi_dbg(INFO_ZONE, "***** RSI module shut down *****\n");
1493 }
1494 
1495 static int rsi_restore(struct device *dev)
1496 {
1497         struct sdio_func *pfunction = dev_to_sdio_func(dev);
1498         struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1499         struct rsi_common *common = adapter->priv;
1500 
1501         rsi_dbg(INFO_ZONE, "SDIO Bus restore ======>\n");
1502         common->hibernate_resume = true;
1503         common->fsm_state = FSM_FW_NOT_LOADED;
1504         common->iface_down = true;
1505 
1506         adapter->sc_nvifs = 0;
1507         adapter->ps_state = PS_NONE;
1508 
1509         common->wow_flags = 0;
1510         common->iface_down = false;
1511 
1512         rsi_dbg(INFO_ZONE, "RSI module restored\n");
1513 
1514         return 0;
1515 }
1516 static const struct dev_pm_ops rsi_pm_ops = {
1517         .suspend = rsi_suspend,
1518         .resume = rsi_resume,
1519         .freeze = rsi_freeze,
1520         .thaw = rsi_thaw,
1521         .restore = rsi_restore,
1522 };
1523 #endif
1524 
1525 static const struct sdio_device_id rsi_dev_table[] =  {
1526         { SDIO_DEVICE(RSI_SDIO_VENDOR_ID, RSI_SDIO_PID_9113) },
1527         { SDIO_DEVICE(RSI_SDIO_VENDOR_ID, RSI_SDIO_PID_9116) },
1528         { /* Blank */},
1529 };
1530 
1531 static struct sdio_driver rsi_driver = {
1532         .name       = "RSI-SDIO WLAN",
1533         .probe      = rsi_probe,
1534         .remove     = rsi_disconnect,
1535         .id_table   = rsi_dev_table,
1536 #ifdef CONFIG_PM
1537         .drv = {
1538                 .pm = &rsi_pm_ops,
1539                 .shutdown   = rsi_shutdown,
1540         }
1541 #endif
1542 };
1543 
1544 /**
1545  * rsi_module_init() - This function registers the sdio module.
1546  * @void: Void.
1547  *
1548  * Return: 0 on success.
1549  */
1550 static int rsi_module_init(void)
1551 {
1552         int ret;
1553 
1554         ret = sdio_register_driver(&rsi_driver);
1555         rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
1556         return ret;
1557 }
1558 
1559 /**
1560  * rsi_module_exit() - This function unregisters the sdio module.
1561  * @void: Void.
1562  *
1563  * Return: None.
1564  */
1565 static void rsi_module_exit(void)
1566 {
1567         sdio_unregister_driver(&rsi_driver);
1568         rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
1569 }
1570 
1571 module_init(rsi_module_init);
1572 module_exit(rsi_module_exit);
1573 
1574 MODULE_AUTHOR("Redpine Signals Inc");
1575 MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
1576 MODULE_SUPPORTED_DEVICE("RSI-91x");
1577 MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
1578 MODULE_FIRMWARE(FIRMWARE_RSI9113);
1579 MODULE_VERSION("0.1");
1580 MODULE_LICENSE("Dual BSD/GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/rsi/rsi_91x_sdio.c

DEFINITIONS
