drivers/bluetooth/btmrvl_sdio.c

   1 /**
   2  * Marvell BT-over-SDIO driver: SDIO interface related functions.
   3  *
   4  * Copyright (C) 2009, 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  *
  15  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  18  * this warranty disclaimer.
  19  **/
  20
  21 #include <linux/firmware.h>
  22 #include <linux/slab.h>
  23
  24 #include <linux/mmc/sdio_ids.h>
  25 #include <linux/mmc/sdio_func.h>
  26 #include <linux/module.h>
  27
  28 #include <net/bluetooth/bluetooth.h>
  29 #include <net/bluetooth/hci_core.h>
  30
  31 #include "btmrvl_drv.h"
  32 #include "btmrvl_sdio.h"
  33
  34 #define VERSION "1.0"
  35
  36 /* The btmrvl_sdio_remove() callback function is called
  37  * when user removes this module from kernel space or ejects
  38  * the card from the slot. The driver handles these 2 cases
  39  * differently.
  40  * If the user is removing the module, a MODULE_SHUTDOWN_REQ
  41  * command is sent to firmware and interrupt will be disabled.
  42  * If the card is removed, there is no need to send command
  43  * or disable interrupt.
  44  *
  45  * The variable 'user_rmmod' is used to distinguish these two
  46  * scenarios. This flag is initialized as FALSE in case the card
  47  * is removed, and will be set to TRUE for module removal when
  48  * module_exit function is called.
  49  */
  50 static u8 user_rmmod;
  51 static u8 sdio_ireg;
  52
  53 static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = {
  54         .cfg = 0x03,
  55         .host_int_mask = 0x04,
  56         .host_intstatus = 0x05,
  57         .card_status = 0x20,
  58         .sq_read_base_addr_a0 = 0x10,
  59         .sq_read_base_addr_a1 = 0x11,
  60         .card_fw_status0 = 0x40,
  61         .card_fw_status1 = 0x41,
  62         .card_rx_len = 0x42,
  63         .card_rx_unit = 0x43,
  64         .io_port_0 = 0x00,
  65         .io_port_1 = 0x01,
  66         .io_port_2 = 0x02,
  67 };
  68 static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = {
  69         .cfg = 0x00,
  70         .host_int_mask = 0x02,
  71         .host_intstatus = 0x03,
  72         .card_status = 0x30,
  73         .sq_read_base_addr_a0 = 0x40,
  74         .sq_read_base_addr_a1 = 0x41,
  75         .card_revision = 0x5c,
  76         .card_fw_status0 = 0x60,
  77         .card_fw_status1 = 0x61,
  78         .card_rx_len = 0x62,
  79         .card_rx_unit = 0x63,
  80         .io_port_0 = 0x78,
  81         .io_port_1 = 0x79,
  82         .io_port_2 = 0x7a,
  83 };
  84
  85 static const struct btmrvl_sdio_card_reg btmrvl_reg_88xx = {
  86         .cfg = 0x00,
  87         .host_int_mask = 0x02,
  88         .host_intstatus = 0x03,
  89         .card_status = 0x50,
  90         .sq_read_base_addr_a0 = 0x60,
  91         .sq_read_base_addr_a1 = 0x61,
  92         .card_revision = 0xbc,
  93         .card_fw_status0 = 0xc0,
  94         .card_fw_status1 = 0xc1,
  95         .card_rx_len = 0xc2,
  96         .card_rx_unit = 0xc3,
  97         .io_port_0 = 0xd8,
  98         .io_port_1 = 0xd9,
  99         .io_port_2 = 0xda,
 100 };
 101
 102 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = {
 103         .helper         = "mrvl/sd8688_helper.bin",
 104         .firmware       = "mrvl/sd8688.bin",
 105         .reg            = &btmrvl_reg_8688,
 106         .sd_blksz_fw_dl = 64,
 107 };
 108
 109 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = {
 110         .helper         = NULL,
 111         .firmware       = "mrvl/sd8787_uapsta.bin",
 112         .reg            = &btmrvl_reg_87xx,
 113         .sd_blksz_fw_dl = 256,
 114 };
 115
 116 static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = {
 117         .helper         = NULL,
 118         .firmware       = "mrvl/sd8797_uapsta.bin",
 119         .reg            = &btmrvl_reg_87xx,
 120         .sd_blksz_fw_dl = 256,
 121 };
 122
 123 static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = {
 124         .helper         = NULL,
 125         .firmware       = "mrvl/sd8897_uapsta.bin",
 126         .reg            = &btmrvl_reg_88xx,
 127         .sd_blksz_fw_dl = 256,
 128 };
 129
 130 static const struct sdio_device_id btmrvl_sdio_ids[] = {
 131         /* Marvell SD8688 Bluetooth device */
 132         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105),
 133                         .driver_data = (unsigned long) &btmrvl_sdio_sd8688 },
 134         /* Marvell SD8787 Bluetooth device */
 135         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A),
 136                         .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 137         /* Marvell SD8787 Bluetooth AMP device */
 138         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B),
 139                         .driver_data = (unsigned long) &btmrvl_sdio_sd8787 },
 140         /* Marvell SD8797 Bluetooth device */
 141         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A),
 142                         .driver_data = (unsigned long) &btmrvl_sdio_sd8797 },
 143         /* Marvell SD8897 Bluetooth device */
 144         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912E),
 145                         .driver_data = (unsigned long) &btmrvl_sdio_sd8897 },
 146
 147         { }     /* Terminating entry */
 148 };
 149
 150 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids);
 151
 152 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card)
 153 {
 154         u8 reg;
 155         int ret;
 156
 157         reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret);
 158         if (!ret)
 159                 card->rx_unit = reg;
 160
 161         return ret;
 162 }
 163
 164 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 165 {
 166         u8 fws0, fws1;
 167         int ret;
 168
 169         *dat = 0;
 170
 171         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 172         if (ret)
 173                 return -EIO;
 174
 175         fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret);
 176         if (ret)
 177                 return -EIO;
 178
 179         *dat = (((u16) fws1) << 8) | fws0;
 180
 181         return 0;
 182 }
 183
 184 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat)
 185 {
 186         u8 reg;
 187         int ret;
 188
 189         reg = sdio_readb(card->func, card->reg->card_rx_len, &ret);
 190         if (!ret)
 191                 *dat = (u16) reg << card->rx_unit;
 192
 193         return ret;
 194 }
 195
 196 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card,
 197                                                                 u8 mask)
 198 {
 199         int ret;
 200
 201         sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret);
 202         if (ret) {
 203                 BT_ERR("Unable to enable the host interrupt!");
 204                 ret = -EIO;
 205         }
 206
 207         return ret;
 208 }
 209
 210 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card,
 211                                                                 u8 mask)
 212 {
 213         u8 host_int_mask;
 214         int ret;
 215
 216         host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret);
 217         if (ret)
 218                 return -EIO;
 219
 220         host_int_mask &= ~mask;
 221
 222         sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret);
 223         if (ret < 0) {
 224                 BT_ERR("Unable to disable the host interrupt!");
 225                 return -EIO;
 226         }
 227
 228         return 0;
 229 }
 230
 231 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits)
 232 {
 233         unsigned int tries;
 234         u8 status;
 235         int ret;
 236
 237         for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) {
 238                 status = sdio_readb(card->func, card->reg->card_status, &ret);
 239                 if (ret)
 240                         goto failed;
 241                 if ((status & bits) == bits)
 242                         return ret;
 243
 244                 udelay(1);
 245         }
 246
 247         ret = -ETIMEDOUT;
 248
 249 failed:
 250         BT_ERR("FAILED! ret=%d", ret);
 251
 252         return ret;
 253 }
 254
 255 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card,
 256                                                                 int pollnum)
 257 {
 258         u16 firmwarestat;
 259         int tries, ret;
 260
 261          /* Wait for firmware to become ready */
 262         for (tries = 0; tries < pollnum; tries++) {
 263                 sdio_claim_host(card->func);
 264                 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat);
 265                 sdio_release_host(card->func);
 266                 if (ret < 0)
 267                         continue;
 268
 269                 if (firmwarestat == FIRMWARE_READY)
 270                         return 0;
 271
 272                 msleep(10);
 273         }
 274
 275         return -ETIMEDOUT;
 276 }
 277
 278 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 279 {
 280         const struct firmware *fw_helper = NULL;
 281         const u8 *helper = NULL;
 282         int ret;
 283         void *tmphlprbuf = NULL;
 284         int tmphlprbufsz, hlprblknow, helperlen;
 285         u8 *helperbuf;
 286         u32 tx_len;
 287
 288         ret = request_firmware(&fw_helper, card->helper,
 289                                                 &card->func->dev);
 290         if ((ret < 0) || !fw_helper) {
 291                 BT_ERR("request_firmware(helper) failed, error code = %d",
 292                                                                         ret);
 293                 ret = -ENOENT;
 294                 goto done;
 295         }
 296
 297         helper = fw_helper->data;
 298         helperlen = fw_helper->size;
 299
 300         BT_DBG("Downloading helper image (%d bytes), block size %d bytes",
 301                                                 helperlen, SDIO_BLOCK_SIZE);
 302
 303         tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 304
 305         tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 306         if (!tmphlprbuf) {
 307                 BT_ERR("Unable to allocate buffer for helper."
 308                         " Terminating download");
 309                 ret = -ENOMEM;
 310                 goto done;
 311         }
 312
 313         helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 314
 315         /* Perform helper data transfer */
 316         tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE)
 317                         - SDIO_HEADER_LEN;
 318         hlprblknow = 0;
 319
 320         do {
 321                 ret = btmrvl_sdio_poll_card_status(card,
 322                                             CARD_IO_READY | DN_LD_CARD_RDY);
 323                 if (ret < 0) {
 324                         BT_ERR("Helper download poll status timeout @ %d",
 325                                 hlprblknow);
 326                         goto done;
 327                 }
 328
 329                 /* Check if there is more data? */
 330                 if (hlprblknow >= helperlen)
 331                         break;
 332
 333                 if (helperlen - hlprblknow < tx_len)
 334                         tx_len = helperlen - hlprblknow;
 335
 336                 /* Little-endian */
 337                 helperbuf[0] = ((tx_len & 0x000000ff) >> 0);
 338                 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8);
 339                 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16);
 340                 helperbuf[3] = ((tx_len & 0xff000000) >> 24);
 341
 342                 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow],
 343                                 tx_len);
 344
 345                 /* Now send the data */
 346                 ret = sdio_writesb(card->func, card->ioport, helperbuf,
 347                                 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE);
 348                 if (ret < 0) {
 349                         BT_ERR("IO error during helper download @ %d",
 350                                 hlprblknow);
 351                         goto done;
 352                 }
 353
 354                 hlprblknow += tx_len;
 355         } while (true);
 356
 357         BT_DBG("Transferring helper image EOF block");
 358
 359         memset(helperbuf, 0x0, SDIO_BLOCK_SIZE);
 360
 361         ret = sdio_writesb(card->func, card->ioport, helperbuf,
 362                                                         SDIO_BLOCK_SIZE);
 363         if (ret < 0) {
 364                 BT_ERR("IO error in writing helper image EOF block");
 365                 goto done;
 366         }
 367
 368         ret = 0;
 369
 370 done:
 371         kfree(tmphlprbuf);
 372         release_firmware(fw_helper);
 373         return ret;
 374 }
 375
 376 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 377 {
 378         const struct firmware *fw_firmware = NULL;
 379         const u8 *firmware = NULL;
 380         int firmwarelen, tmpfwbufsz, ret;
 381         unsigned int tries, offset;
 382         u8 base0, base1;
 383         void *tmpfwbuf = NULL;
 384         u8 *fwbuf;
 385         u16 len, blksz_dl = card->sd_blksz_fw_dl;
 386         int txlen = 0, tx_blocks = 0, count = 0;
 387
 388         ret = request_firmware(&fw_firmware, card->firmware,
 389                                                         &card->func->dev);
 390         if ((ret < 0) || !fw_firmware) {
 391                 BT_ERR("request_firmware(firmware) failed, error code = %d",
 392                                                                         ret);
 393                 ret = -ENOENT;
 394                 goto done;
 395         }
 396
 397         firmware = fw_firmware->data;
 398         firmwarelen = fw_firmware->size;
 399
 400         BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 401
 402         tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 403         tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 404         if (!tmpfwbuf) {
 405                 BT_ERR("Unable to allocate buffer for firmware."
 406                        " Terminating download");
 407                 ret = -ENOMEM;
 408                 goto done;
 409         }
 410
 411         /* Ensure aligned firmware buffer */
 412         fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 413
 414         /* Perform firmware data transfer */
 415         offset = 0;
 416         do {
 417                 ret = btmrvl_sdio_poll_card_status(card,
 418                                         CARD_IO_READY | DN_LD_CARD_RDY);
 419                 if (ret < 0) {
 420                         BT_ERR("FW download with helper poll status"
 421                                                 " timeout @ %d", offset);
 422                         goto done;
 423                 }
 424
 425                 /* Check if there is more data ? */
 426                 if (offset >= firmwarelen)
 427                         break;
 428
 429                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
 430                         base0 = sdio_readb(card->func,
 431                                         card->reg->sq_read_base_addr_a0, &ret);
 432                         if (ret) {
 433                                 BT_ERR("BASE0 register read failed:"
 434                                         " base0 = 0x%04X(%d)."
 435                                         " Terminating download",
 436                                         base0, base0);
 437                                 ret = -EIO;
 438                                 goto done;
 439                         }
 440                         base1 = sdio_readb(card->func,
 441                                         card->reg->sq_read_base_addr_a1, &ret);
 442                         if (ret) {
 443                                 BT_ERR("BASE1 register read failed:"
 444                                         " base1 = 0x%04X(%d)."
 445                                         " Terminating download",
 446                                         base1, base1);
 447                                 ret = -EIO;
 448                                 goto done;
 449                         }
 450
 451                         len = (((u16) base1) << 8) | base0;
 452                         if (len)
 453                                 break;
 454
 455                         udelay(10);
 456                 }
 457
 458                 if (!len)
 459                         break;
 460                 else if (len > BTM_UPLD_SIZE) {
 461                         BT_ERR("FW download failure @%d, invalid length %d",
 462                                                                 offset, len);
 463                         ret = -EINVAL;
 464                         goto done;
 465                 }
 466
 467                 txlen = len;
 468
 469                 if (len & BIT(0)) {
 470                         count++;
 471                         if (count > MAX_WRITE_IOMEM_RETRY) {
 472                                 BT_ERR("FW download failure @%d, "
 473                                         "over max retry count", offset);
 474                                 ret = -EIO;
 475                                 goto done;
 476                         }
 477                         BT_ERR("FW CRC error indicated by the helper: "
 478                                 "len = 0x%04X, txlen = %d", len, txlen);
 479                         len &= ~BIT(0);
 480                         /* Set txlen to 0 so as to resend from same offset */
 481                         txlen = 0;
 482                 } else {
 483                         count = 0;
 484
 485                         /* Last block ? */
 486                         if (firmwarelen - offset < txlen)
 487                                 txlen = firmwarelen - offset;
 488
 489                         tx_blocks = DIV_ROUND_UP(txlen, blksz_dl);
 490
 491                         memcpy(fwbuf, &firmware[offset], txlen);
 492                 }
 493
 494                 ret = sdio_writesb(card->func, card->ioport, fwbuf,
 495                                                 tx_blocks * blksz_dl);
 496
 497                 if (ret < 0) {
 498                         BT_ERR("FW download, writesb(%d) failed @%d",
 499                                                         count, offset);
 500                         sdio_writeb(card->func, HOST_CMD53_FIN,
 501                                                 card->reg->cfg, &ret);
 502                         if (ret)
 503                                 BT_ERR("writeb failed (CFG)");
 504                 }
 505
 506                 offset += txlen;
 507         } while (true);
 508
 509         BT_DBG("FW download over, size %d bytes", offset);
 510
 511         ret = 0;
 512
 513 done:
 514         kfree(tmpfwbuf);
 515         release_firmware(fw_firmware);
 516         return ret;
 517 }
 518
 519 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 520 {
 521         u16 buf_len = 0;
 522         int ret, num_blocks, blksz;
 523         struct sk_buff *skb = NULL;
 524         u32 type;
 525         u8 *payload = NULL;
 526         struct hci_dev *hdev = priv->btmrvl_dev.hcidev;
 527         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 528
 529         if (!card || !card->func) {
 530                 BT_ERR("card or function is NULL!");
 531                 ret = -EINVAL;
 532                 goto exit;
 533         }
 534
 535         /* Read the length of data to be transferred */
 536         ret = btmrvl_sdio_read_rx_len(card, &buf_len);
 537         if (ret < 0) {
 538                 BT_ERR("read rx_len failed");
 539                 ret = -EIO;
 540                 goto exit;
 541         }
 542
 543         blksz = SDIO_BLOCK_SIZE;
 544         num_blocks = DIV_ROUND_UP(buf_len, blksz);
 545
 546         if (buf_len <= SDIO_HEADER_LEN
 547             || (num_blocks * blksz) > ALLOC_BUF_SIZE) {
 548                 BT_ERR("invalid packet length: %d", buf_len);
 549                 ret = -EINVAL;
 550                 goto exit;
 551         }
 552
 553         /* Allocate buffer */
 554         skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC);
 555         if (skb == NULL) {
 556                 BT_ERR("No free skb");
 557                 ret = -ENOMEM;
 558                 goto exit;
 559         }
 560
 561         if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) {
 562                 skb_put(skb, (unsigned long) skb->data &
 563                                         (BTSDIO_DMA_ALIGN - 1));
 564                 skb_pull(skb, (unsigned long) skb->data &
 565                                         (BTSDIO_DMA_ALIGN - 1));
 566         }
 567
 568         payload = skb->data;
 569
 570         ret = sdio_readsb(card->func, payload, card->ioport,
 571                           num_blocks * blksz);
 572         if (ret < 0) {
 573                 BT_ERR("readsb failed: %d", ret);
 574                 ret = -EIO;
 575                 goto exit;
 576         }
 577
 578         /* This is SDIO specific header length: byte[2][1][0], type: byte[3]
 579          * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor)
 580          */
 581
 582         buf_len = payload[0];
 583         buf_len |= payload[1] << 8;
 584         buf_len |= payload[2] << 16;
 585
 586         if (buf_len > blksz * num_blocks) {
 587                 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d",
 588                        buf_len, blksz * num_blocks);
 589                 ret = -EIO;
 590                 goto exit;
 591         }
 592
 593         type = payload[3];
 594
 595         switch (type) {
 596         case HCI_ACLDATA_PKT:
 597         case HCI_SCODATA_PKT:
 598         case HCI_EVENT_PKT:
 599                 bt_cb(skb)->pkt_type = type;
 600                 skb_put(skb, buf_len);
 601                 skb_pull(skb, SDIO_HEADER_LEN);
 602
 603                 if (type == HCI_EVENT_PKT) {
 604                         if (btmrvl_check_evtpkt(priv, skb))
 605                                 hci_recv_frame(hdev, skb);
 606                 } else {
 607                         hci_recv_frame(hdev, skb);
 608                 }
 609
 610                 hdev->stat.byte_rx += buf_len;
 611                 break;
 612
 613         case MRVL_VENDOR_PKT:
 614                 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT;
 615                 skb_put(skb, buf_len);
 616                 skb_pull(skb, SDIO_HEADER_LEN);
 617
 618                 if (btmrvl_process_event(priv, skb))
 619                         hci_recv_frame(hdev, skb);
 620
 621                 hdev->stat.byte_rx += buf_len;
 622                 break;
 623
 624         default:
 625                 BT_ERR("Unknown packet type:%d", type);
 626                 BT_ERR("hex: %*ph", blksz * num_blocks, payload);
 627
 628                 kfree_skb(skb);
 629                 skb = NULL;
 630                 break;
 631         }
 632
 633 exit:
 634         if (ret) {
 635                 hdev->stat.err_rx++;
 636                 kfree_skb(skb);
 637         }
 638
 639         return ret;
 640 }
 641
 642 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 643 {
 644         ulong flags;
 645         u8 ireg;
 646         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 647
 648         spin_lock_irqsave(&priv->driver_lock, flags);
 649         ireg = sdio_ireg;
 650         sdio_ireg = 0;
 651         spin_unlock_irqrestore(&priv->driver_lock, flags);
 652
 653         sdio_claim_host(card->func);
 654         if (ireg & DN_LD_HOST_INT_STATUS) {
 655                 if (priv->btmrvl_dev.tx_dnld_rdy)
 656                         BT_DBG("tx_done already received: "
 657                                 " int_status=0x%x", ireg);
 658                 else
 659                         priv->btmrvl_dev.tx_dnld_rdy = true;
 660         }
 661
 662         if (ireg & UP_LD_HOST_INT_STATUS)
 663                 btmrvl_sdio_card_to_host(priv);
 664
 665         sdio_release_host(card->func);
 666
 667         return 0;
 668 }
 669
 670 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 671 {
 672         struct btmrvl_private *priv;
 673         struct btmrvl_sdio_card *card;
 674         ulong flags;
 675         u8 ireg = 0;
 676         int ret;
 677
 678         card = sdio_get_drvdata(func);
 679         if (!card || !card->priv) {
 680                 BT_ERR("sbi_interrupt(%p) card or priv is "
 681                                 "NULL, card=%p\n", func, card);
 682                 return;
 683         }
 684
 685         priv = card->priv;
 686
 687         ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
 688         if (ret) {
 689                 BT_ERR("sdio_readb: read int status register failed");
 690                 return;
 691         }
 692
 693         if (ireg != 0) {
 694                 /*
 695                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
 696                  * Clear the interrupt status register and re-enable the
 697                  * interrupt.
 698                  */
 699                 BT_DBG("ireg = 0x%x", ireg);
 700
 701                 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
 702                                         UP_LD_HOST_INT_STATUS),
 703                                 card->reg->host_intstatus, &ret);
 704                 if (ret) {
 705                         BT_ERR("sdio_writeb: clear int status register failed");
 706                         return;
 707                 }
 708         }
 709
 710         spin_lock_irqsave(&priv->driver_lock, flags);
 711         sdio_ireg |= ireg;
 712         spin_unlock_irqrestore(&priv->driver_lock, flags);
 713
 714         btmrvl_interrupt(priv);
 715 }
 716
 717 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
 718 {
 719         struct sdio_func *func;
 720         u8 reg;
 721         int ret = 0;
 722
 723         if (!card || !card->func) {
 724                 BT_ERR("Error: card or function is NULL!");
 725                 ret = -EINVAL;
 726                 goto failed;
 727         }
 728
 729         func = card->func;
 730
 731         sdio_claim_host(func);
 732
 733         ret = sdio_enable_func(func);
 734         if (ret) {
 735                 BT_ERR("sdio_enable_func() failed: ret=%d", ret);
 736                 ret = -EIO;
 737                 goto release_host;
 738         }
 739
 740         ret = sdio_claim_irq(func, btmrvl_sdio_interrupt);
 741         if (ret) {
 742                 BT_ERR("sdio_claim_irq failed: ret=%d", ret);
 743                 ret = -EIO;
 744                 goto disable_func;
 745         }
 746
 747         ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE);
 748         if (ret) {
 749                 BT_ERR("cannot set SDIO block size");
 750                 ret = -EIO;
 751                 goto release_irq;
 752         }
 753
 754         reg = sdio_readb(func, card->reg->io_port_0, &ret);
 755         if (ret < 0) {
 756                 ret = -EIO;
 757                 goto release_irq;
 758         }
 759
 760         card->ioport = reg;
 761
 762         reg = sdio_readb(func, card->reg->io_port_1, &ret);
 763         if (ret < 0) {
 764                 ret = -EIO;
 765                 goto release_irq;
 766         }
 767
 768         card->ioport |= (reg << 8);
 769
 770         reg = sdio_readb(func, card->reg->io_port_2, &ret);
 771         if (ret < 0) {
 772                 ret = -EIO;
 773                 goto release_irq;
 774         }
 775
 776         card->ioport |= (reg << 16);
 777
 778         BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport);
 779
 780         sdio_set_drvdata(func, card);
 781
 782         sdio_release_host(func);
 783
 784         return 0;
 785
 786 release_irq:
 787         sdio_release_irq(func);
 788
 789 disable_func:
 790         sdio_disable_func(func);
 791
 792 release_host:
 793         sdio_release_host(func);
 794
 795 failed:
 796         return ret;
 797 }
 798
 799 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card)
 800 {
 801         if (card && card->func) {
 802                 sdio_claim_host(card->func);
 803                 sdio_release_irq(card->func);
 804                 sdio_disable_func(card->func);
 805                 sdio_release_host(card->func);
 806                 sdio_set_drvdata(card->func, NULL);
 807         }
 808
 809         return 0;
 810 }
 811
 812 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card)
 813 {
 814         int ret;
 815
 816         if (!card || !card->func)
 817                 return -EINVAL;
 818
 819         sdio_claim_host(card->func);
 820
 821         ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE);
 822
 823         btmrvl_sdio_get_rx_unit(card);
 824
 825         sdio_release_host(card->func);
 826
 827         return ret;
 828 }
 829
 830 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card)
 831 {
 832         int ret;
 833
 834         if (!card || !card->func)
 835                 return -EINVAL;
 836
 837         sdio_claim_host(card->func);
 838
 839         ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE);
 840
 841         sdio_release_host(card->func);
 842
 843         return ret;
 844 }
 845
 846 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv,
 847                                 u8 *payload, u16 nb)
 848 {
 849         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 850         int ret = 0;
 851         int buf_block_len;
 852         int blksz;
 853         int i = 0;
 854         u8 *buf = NULL;
 855         void *tmpbuf = NULL;
 856         int tmpbufsz;
 857
 858         if (!card || !card->func) {
 859                 BT_ERR("card or function is NULL!");
 860                 return -EINVAL;
 861         }
 862
 863         buf = payload;
 864         if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) {
 865                 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN);
 866                 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL);
 867                 if (!tmpbuf)
 868                         return -ENOMEM;
 869                 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN);
 870                 memcpy(buf, payload, nb);
 871         }
 872
 873         blksz = SDIO_BLOCK_SIZE;
 874         buf_block_len = DIV_ROUND_UP(nb, blksz);
 875
 876         sdio_claim_host(card->func);
 877
 878         do {
 879                 /* Transfer data to card */
 880                 ret = sdio_writesb(card->func, card->ioport, buf,
 881                                    buf_block_len * blksz);
 882                 if (ret < 0) {
 883                         i++;
 884                         BT_ERR("i=%d writesb failed: %d", i, ret);
 885                         BT_ERR("hex: %*ph", nb, payload);
 886                         ret = -EIO;
 887                         if (i > MAX_WRITE_IOMEM_RETRY)
 888                                 goto exit;
 889                 }
 890         } while (ret);
 891
 892         priv->btmrvl_dev.tx_dnld_rdy = false;
 893
 894 exit:
 895         sdio_release_host(card->func);
 896         kfree(tmpbuf);
 897
 898         return ret;
 899 }
 900
 901 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 902 {
 903         int ret;
 904         u8 fws0;
 905         int pollnum = MAX_POLL_TRIES;
 906
 907         if (!card || !card->func) {
 908                 BT_ERR("card or function is NULL!");
 909                 return -EINVAL;
 910         }
 911
 912         if (!btmrvl_sdio_verify_fw_download(card, 1)) {
 913                 BT_DBG("Firmware already downloaded!");
 914                 return 0;
 915         }
 916
 917         sdio_claim_host(card->func);
 918
 919         /* Check if other function driver is downloading the firmware */
 920         fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret);
 921         if (ret) {
 922                 BT_ERR("Failed to read FW downloading status!");
 923                 ret = -EIO;
 924                 goto done;
 925         }
 926         if (fws0) {
 927                 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0);
 928
 929                 /* Give other function more time to download the firmware */
 930                 pollnum *= 10;
 931         } else {
 932                 if (card->helper) {
 933                         ret = btmrvl_sdio_download_helper(card);
 934                         if (ret) {
 935                                 BT_ERR("Failed to download helper!");
 936                                 ret = -EIO;
 937                                 goto done;
 938                         }
 939                 }
 940
 941                 if (btmrvl_sdio_download_fw_w_helper(card)) {
 942                         BT_ERR("Failed to download firmware!");
 943                         ret = -EIO;
 944                         goto done;
 945                 }
 946         }
 947
 948         sdio_release_host(card->func);
 949
 950         /*
 951          * winner or not, with this test the FW synchronizes when the
 952          * module can continue its initialization
 953          */
 954         if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 955                 BT_ERR("FW failed to be active in time!");
 956                 return -ETIMEDOUT;
 957         }
 958
 959         return 0;
 960
 961 done:
 962         sdio_release_host(card->func);
 963         return ret;
 964 }
 965
 966 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv)
 967 {
 968         struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 969         int ret = 0;
 970
 971         if (!card || !card->func) {
 972                 BT_ERR("card or function is NULL!");
 973                 return -EINVAL;
 974         }
 975
 976         sdio_claim_host(card->func);
 977
 978         sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret);
 979
 980         sdio_release_host(card->func);
 981
 982         BT_DBG("wake up firmware");
 983
 984         return ret;
 985 }
 986
 987 static int btmrvl_sdio_probe(struct sdio_func *func,
 988                                         const struct sdio_device_id *id)
 989 {
 990         int ret = 0;
 991         struct btmrvl_private *priv = NULL;
 992         struct btmrvl_sdio_card *card = NULL;
 993
 994         BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d",
 995                         id->vendor, id->device, id->class, func->num);
 996
 997         card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL);
 998         if (!card)
 999                 return -ENOMEM;
1000
1001         card->func = func;
1002
1003         if (id->driver_data) {
1004                 struct btmrvl_sdio_device *data = (void *) id->driver_data;
1005                 card->helper = data->helper;
1006                 card->firmware = data->firmware;
1007                 card->reg = data->reg;
1008                 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl;
1009         }
1010
1011         if (btmrvl_sdio_register_dev(card) < 0) {
1012                 BT_ERR("Failed to register BT device!");
1013                 return -ENODEV;
1014         }
1015
1016         /* Disable the interrupts on the card */
1017         btmrvl_sdio_disable_host_int(card);
1018
1019         if (btmrvl_sdio_download_fw(card)) {
1020                 BT_ERR("Downloading firmware failed!");
1021                 ret = -ENODEV;
1022                 goto unreg_dev;
1023         }
1024
1025         btmrvl_sdio_enable_host_int(card);
1026
1027         priv = btmrvl_add_card(card);
1028         if (!priv) {
1029                 BT_ERR("Initializing card failed!");
1030                 ret = -ENODEV;
1031                 goto disable_host_int;
1032         }
1033
1034         card->priv = priv;
1035
1036         /* Initialize the interface specific function pointers */
1037         priv->hw_host_to_card = btmrvl_sdio_host_to_card;
1038         priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
1039         priv->hw_process_int_status = btmrvl_sdio_process_int_status;
1040
1041         if (btmrvl_register_hdev(priv)) {
1042                 BT_ERR("Register hdev failed!");
1043                 ret = -ENODEV;
1044                 goto disable_host_int;
1045         }
1046
1047         return 0;
1048
1049 disable_host_int:
1050         btmrvl_sdio_disable_host_int(card);
1051 unreg_dev:
1052         btmrvl_sdio_unregister_dev(card);
1053         return ret;
1054 }
1055
1056 static void btmrvl_sdio_remove(struct sdio_func *func)
1057 {
1058         struct btmrvl_sdio_card *card;
1059
1060         if (func) {
1061                 card = sdio_get_drvdata(func);
1062                 if (card) {
1063                         /* Send SHUTDOWN command & disable interrupt
1064                          * if user removes the module.
1065                          */
1066                         if (user_rmmod) {
1067                                 btmrvl_send_module_cfg_cmd(card->priv,
1068                                                         MODULE_SHUTDOWN_REQ);
1069                                 btmrvl_sdio_disable_host_int(card);
1070                         }
1071                         BT_DBG("unregester dev");
1072                         btmrvl_sdio_unregister_dev(card);
1073                         btmrvl_remove_card(card->priv);
1074                 }
1075         }
1076 }
1077
1078 static int btmrvl_sdio_suspend(struct device *dev)
1079 {
1080         struct sdio_func *func = dev_to_sdio_func(dev);
1081         struct btmrvl_sdio_card *card;
1082         struct btmrvl_private *priv;
1083         mmc_pm_flag_t pm_flags;
1084         struct hci_dev *hcidev;
1085
1086         if (func) {
1087                 pm_flags = sdio_get_host_pm_caps(func);
1088                 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func),
1089                        pm_flags);
1090                 if (!(pm_flags & MMC_PM_KEEP_POWER)) {
1091                         BT_ERR("%s: cannot remain alive while suspended",
1092                                sdio_func_id(func));
1093                         return -ENOSYS;
1094                 }
1095                 card = sdio_get_drvdata(func);
1096                 if (!card || !card->priv) {
1097                         BT_ERR("card or priv structure is not valid");
1098                         return 0;
1099                 }
1100         } else {
1101                 BT_ERR("sdio_func is not specified");
1102                 return 0;
1103         }
1104
1105         priv = card->priv;
1106
1107         if (priv->adapter->hs_state != HS_ACTIVATED) {
1108                 if (btmrvl_enable_hs(priv)) {
1109                         BT_ERR("HS not actived, suspend failed!");
1110                         return -EBUSY;
1111                 }
1112         }
1113         hcidev = priv->btmrvl_dev.hcidev;
1114         BT_DBG("%s: SDIO suspend", hcidev->name);
1115         hci_suspend_dev(hcidev);
1116         skb_queue_purge(&priv->adapter->tx_queue);
1117
1118         priv->adapter->is_suspended = true;
1119
1120         /* We will keep the power when hs enabled successfully */
1121         if (priv->adapter->hs_state == HS_ACTIVATED) {
1122                 BT_DBG("suspend with MMC_PM_KEEP_POWER");
1123                 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1124         } else {
1125                 BT_DBG("suspend without MMC_PM_KEEP_POWER");
1126                 return 0;
1127         }
1128 }
1129
1130 static int btmrvl_sdio_resume(struct device *dev)
1131 {
1132         struct sdio_func *func = dev_to_sdio_func(dev);
1133         struct btmrvl_sdio_card *card;
1134         struct btmrvl_private *priv;
1135         mmc_pm_flag_t pm_flags;
1136         struct hci_dev *hcidev;
1137
1138         if (func) {
1139                 pm_flags = sdio_get_host_pm_caps(func);
1140                 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func),
1141                        pm_flags);
1142                 card = sdio_get_drvdata(func);
1143                 if (!card || !card->priv) {
1144                         BT_ERR("card or priv structure is not valid");
1145                         return 0;
1146                 }
1147         } else {
1148                 BT_ERR("sdio_func is not specified");
1149                 return 0;
1150         }
1151         priv = card->priv;
1152
1153         if (!priv->adapter->is_suspended) {
1154                 BT_DBG("device already resumed");
1155                 return 0;
1156         }
1157
1158         priv->adapter->is_suspended = false;
1159         hcidev = priv->btmrvl_dev.hcidev;
1160         BT_DBG("%s: SDIO resume", hcidev->name);
1161         hci_resume_dev(hcidev);
1162         priv->hw_wakeup_firmware(priv);
1163         priv->adapter->hs_state = HS_DEACTIVATED;
1164         BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name);
1165
1166         return 0;
1167 }
1168
1169 static const struct dev_pm_ops btmrvl_sdio_pm_ops = {
1170         .suspend        = btmrvl_sdio_suspend,
1171         .resume         = btmrvl_sdio_resume,
1172 };
1173
1174 static struct sdio_driver bt_mrvl_sdio = {
1175         .name           = "btmrvl_sdio",
1176         .id_table       = btmrvl_sdio_ids,
1177         .probe          = btmrvl_sdio_probe,
1178         .remove         = btmrvl_sdio_remove,
1179         .drv = {
1180                 .owner = THIS_MODULE,
1181                 .pm = &btmrvl_sdio_pm_ops,
1182         }
1183 };
1184
1185 static int __init btmrvl_sdio_init_module(void)
1186 {
1187         if (sdio_register_driver(&bt_mrvl_sdio) != 0) {
1188                 BT_ERR("SDIO Driver Registration Failed");
1189                 return -ENODEV;
1190         }
1191
1192         /* Clear the flag in case user removes the card. */
1193         user_rmmod = 0;
1194
1195         return 0;
1196 }
1197
1198 static void __exit btmrvl_sdio_exit_module(void)
1199 {
1200         /* Set the flag as user is removing this module. */
1201         user_rmmod = 1;
1202
1203         sdio_unregister_driver(&bt_mrvl_sdio);
1204 }
1205
1206 module_init(btmrvl_sdio_init_module);
1207 module_exit(btmrvl_sdio_exit_module);
1208
1209 MODULE_AUTHOR("Marvell International Ltd.");
1210 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION);
1211 MODULE_VERSION(VERSION);
1212 MODULE_LICENSE("GPL v2");
1213 MODULE_FIRMWARE("mrvl/sd8688_helper.bin");
1214 MODULE_FIRMWARE("mrvl/sd8688.bin");
1215 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin");
1216 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin");
1217 MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin");