drivers/net/wireless/libertas/if_sdio.c

   1 /*
   2  *  linux/drivers/net/wireless/libertas/if_sdio.c
   3  *
   4  *  Copyright 2007-2008 Pierre Ossman
   5  *
   6  * Inspired by if_cs.c, Copyright 2007 Holger Schurig
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  *
  13  * This hardware has more or less no CMD53 support, so all registers
  14  * must be accessed using sdio_readb()/sdio_writeb().
  15  *
  16  * Transfers must be in one transaction or the firmware goes bonkers.
  17  * This means that the transfer must either be small enough to do a
  18  * byte based transfer or it must be padded to a multiple of the
  19  * current block size.
  20  *
  21  * As SDIO is still new to the kernel, it is unfortunately common with
  22  * bugs in the host controllers related to that. One such bug is that
  23  * controllers cannot do transfers that aren't a multiple of 4 bytes.
  24  * If you don't have time to fix the host controller driver, you can
  25  * work around the problem by modifying if_sdio_host_to_card() and
  26  * if_sdio_card_to_host() to pad the data.
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/slab.h>
  32 #include <linux/firmware.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/delay.h>
  35 #include <linux/mmc/card.h>
  36 #include <linux/mmc/sdio_func.h>
  37 #include <linux/mmc/sdio_ids.h>
  38 #include <linux/mmc/sdio.h>
  39 #include <linux/mmc/host.h>
  40
  41 #include "host.h"
  42 #include "decl.h"
  43 #include "defs.h"
  44 #include "dev.h"
  45 #include "cmd.h"
  46 #include "if_sdio.h"
  47
  48 /* The if_sdio_remove() callback function is called when
  49  * user removes this module from kernel space or ejects
  50  * the card from the slot. The driver handles these 2 cases
  51  * differently for SD8688 combo chip.
  52  * If the user is removing the module, the FUNC_SHUTDOWN
  53  * command for SD8688 is sent to the firmware.
  54  * If the card is removed, there is no need to send this command.
  55  *
  56  * The variable 'user_rmmod' is used to distinguish these two
  57  * scenarios. This flag is initialized as FALSE in case the card
  58  * is removed, and will be set to TRUE for module removal when
  59  * module_exit function is called.
  60  */
  61 static u8 user_rmmod;
  62
  63 static char *lbs_helper_name = NULL;
  64 module_param_named(helper_name, lbs_helper_name, charp, 0644);
  65
  66 static char *lbs_fw_name = NULL;
  67 module_param_named(fw_name, lbs_fw_name, charp, 0644);
  68
  69 static const struct sdio_device_id if_sdio_ids[] = {
  70         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
  71                         SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
  72         { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
  73                         SDIO_DEVICE_ID_MARVELL_8688WLAN) },
  74         { /* end: all zeroes */                         },
  75 };
  76
  77 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
  78
  79 #define MODEL_8385      0x04
  80 #define MODEL_8686      0x0b
  81 #define MODEL_8688      0x10
  82
  83 static const struct lbs_fw_table fw_table[] = {
  84         { MODEL_8385, "libertas/sd8385_helper.bin", "libertas/sd8385.bin" },
  85         { MODEL_8385, "sd8385_helper.bin", "sd8385.bin" },
  86         { MODEL_8686, "libertas/sd8686_v9_helper.bin", "libertas/sd8686_v9.bin" },
  87         { MODEL_8686, "libertas/sd8686_v8_helper.bin", "libertas/sd8686_v8.bin" },
  88         { MODEL_8686, "sd8686_helper.bin", "sd8686.bin" },
  89         { MODEL_8688, "libertas/sd8688_helper.bin", "libertas/sd8688.bin" },
  90         { MODEL_8688, "sd8688_helper.bin", "sd8688.bin" },
  91         { 0, NULL, NULL }
  92 };
  93 MODULE_FIRMWARE("libertas/sd8385_helper.bin");
  94 MODULE_FIRMWARE("libertas/sd8385.bin");
  95 MODULE_FIRMWARE("sd8385_helper.bin");
  96 MODULE_FIRMWARE("sd8385.bin");
  97 MODULE_FIRMWARE("libertas/sd8686_v9_helper.bin");
  98 MODULE_FIRMWARE("libertas/sd8686_v9.bin");
  99 MODULE_FIRMWARE("libertas/sd8686_v8_helper.bin");
 100 MODULE_FIRMWARE("libertas/sd8686_v8.bin");
 101 MODULE_FIRMWARE("sd8686_helper.bin");
 102 MODULE_FIRMWARE("sd8686.bin");
 103 MODULE_FIRMWARE("libertas/sd8688_helper.bin");
 104 MODULE_FIRMWARE("libertas/sd8688.bin");
 105 MODULE_FIRMWARE("sd8688_helper.bin");
 106 MODULE_FIRMWARE("sd8688.bin");
 107
 108 struct if_sdio_packet {
 109         struct if_sdio_packet   *next;
 110         u16                     nb;
 111         u8                      buffer[0] __attribute__((aligned(4)));
 112 };
 113
 114 struct if_sdio_card {
 115         struct sdio_func        *func;
 116         struct lbs_private      *priv;
 117
 118         int                     model;
 119         unsigned long           ioport;
 120         unsigned int            scratch_reg;
 121
 122         const char              *helper;
 123         const char              *firmware;
 124         bool                    helper_allocated;
 125         bool                    firmware_allocated;
 126
 127         u8                      buffer[65536] __attribute__((aligned(4)));
 128
 129         spinlock_t              lock;
 130         struct if_sdio_packet   *packets;
 131
 132         struct workqueue_struct *workqueue;
 133         struct work_struct      packet_worker;
 134
 135         u8                      rx_unit;
 136 };
 137
 138 /********************************************************************/
 139 /* I/O                                                              */
 140 /********************************************************************/
 141
 142 /*
 143  *  For SD8385/SD8686, this function reads firmware status after
 144  *  the image is downloaded, or reads RX packet length when
 145  *  interrupt (with IF_SDIO_H_INT_UPLD bit set) is received.
 146  *  For SD8688, this function reads firmware status only.
 147  */
 148 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
 149 {
 150         int ret;
 151         u16 scratch;
 152
 153         scratch = sdio_readb(card->func, card->scratch_reg, &ret);
 154         if (!ret)
 155                 scratch |= sdio_readb(card->func, card->scratch_reg + 1,
 156                                         &ret) << 8;
 157
 158         if (err)
 159                 *err = ret;
 160
 161         if (ret)
 162                 return 0xffff;
 163
 164         return scratch;
 165 }
 166
 167 static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
 168 {
 169         int ret;
 170         u8 rx_unit;
 171
 172         rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
 173
 174         if (ret)
 175                 rx_unit = 0;
 176
 177         return rx_unit;
 178 }
 179
 180 static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
 181 {
 182         int ret;
 183         u16 rx_len;
 184
 185         switch (card->model) {
 186         case MODEL_8385:
 187         case MODEL_8686:
 188                 rx_len = if_sdio_read_scratch(card, &ret);
 189                 break;
 190         case MODEL_8688:
 191         default: /* for newer chipsets */
 192                 rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
 193                 if (!ret)
 194                         rx_len <<= card->rx_unit;
 195                 else
 196                         rx_len = 0xffff;        /* invalid length */
 197
 198                 break;
 199         }
 200
 201         if (err)
 202                 *err = ret;
 203
 204         return rx_len;
 205 }
 206
 207 static int if_sdio_handle_cmd(struct if_sdio_card *card,
 208                 u8 *buffer, unsigned size)
 209 {
 210         struct lbs_private *priv = card->priv;
 211         int ret;
 212         unsigned long flags;
 213         u8 i;
 214
 215         lbs_deb_enter(LBS_DEB_SDIO);
 216
 217         if (size > LBS_CMD_BUFFER_SIZE) {
 218                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 219                         (int)size);
 220                 ret = -E2BIG;
 221                 goto out;
 222         }
 223
 224         spin_lock_irqsave(&priv->driver_lock, flags);
 225
 226         i = (priv->resp_idx == 0) ? 1 : 0;
 227         BUG_ON(priv->resp_len[i]);
 228         priv->resp_len[i] = size;
 229         memcpy(priv->resp_buf[i], buffer, size);
 230         lbs_notify_command_response(priv, i);
 231
 232         spin_unlock_irqrestore(&card->priv->driver_lock, flags);
 233
 234         ret = 0;
 235
 236 out:
 237         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 238         return ret;
 239 }
 240
 241 static int if_sdio_handle_data(struct if_sdio_card *card,
 242                 u8 *buffer, unsigned size)
 243 {
 244         int ret;
 245         struct sk_buff *skb;
 246         char *data;
 247
 248         lbs_deb_enter(LBS_DEB_SDIO);
 249
 250         if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 251                 lbs_deb_sdio("response packet too large (%d bytes)\n",
 252                         (int)size);
 253                 ret = -E2BIG;
 254                 goto out;
 255         }
 256
 257         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 258         if (!skb) {
 259                 ret = -ENOMEM;
 260                 goto out;
 261         }
 262
 263         skb_reserve(skb, NET_IP_ALIGN);
 264
 265         data = skb_put(skb, size);
 266
 267         memcpy(data, buffer, size);
 268
 269         lbs_process_rxed_packet(card->priv, skb);
 270
 271         ret = 0;
 272
 273 out:
 274         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 275
 276         return ret;
 277 }
 278
 279 static int if_sdio_handle_event(struct if_sdio_card *card,
 280                 u8 *buffer, unsigned size)
 281 {
 282         int ret;
 283         u32 event;
 284
 285         lbs_deb_enter(LBS_DEB_SDIO);
 286
 287         if (card->model == MODEL_8385) {
 288                 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
 289                 if (ret)
 290                         goto out;
 291
 292                 /* right shift 3 bits to get the event id */
 293                 event >>= 3;
 294         } else {
 295                 if (size < 4) {
 296                         lbs_deb_sdio("event packet too small (%d bytes)\n",
 297                                 (int)size);
 298                         ret = -EINVAL;
 299                         goto out;
 300                 }
 301                 event = buffer[3] << 24;
 302                 event |= buffer[2] << 16;
 303                 event |= buffer[1] << 8;
 304                 event |= buffer[0] << 0;
 305         }
 306
 307         lbs_queue_event(card->priv, event & 0xFF);
 308         ret = 0;
 309
 310 out:
 311         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 312
 313         return ret;
 314 }
 315
 316 static int if_sdio_wait_status(struct if_sdio_card *card, const u8 condition)
 317 {
 318         u8 status;
 319         unsigned long timeout;
 320         int ret = 0;
 321
 322         timeout = jiffies + HZ;
 323         while (1) {
 324                 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
 325                 if (ret)
 326                         return ret;
 327                 if ((status & condition) == condition)
 328                         break;
 329                 if (time_after(jiffies, timeout))
 330                         return -ETIMEDOUT;
 331                 mdelay(1);
 332         }
 333         return ret;
 334 }
 335
 336 static int if_sdio_card_to_host(struct if_sdio_card *card)
 337 {
 338         int ret;
 339         u16 size, type, chunk;
 340
 341         lbs_deb_enter(LBS_DEB_SDIO);
 342
 343         size = if_sdio_read_rx_len(card, &ret);
 344         if (ret)
 345                 goto out;
 346
 347         if (size < 4) {
 348                 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
 349                         (int)size);
 350                 ret = -EINVAL;
 351                 goto out;
 352         }
 353
 354         ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
 355         if (ret)
 356                 goto out;
 357
 358         /*
 359          * The transfer must be in one transaction or the firmware
 360          * goes suicidal. There's no way to guarantee that for all
 361          * controllers, but we can at least try.
 362          */
 363         chunk = sdio_align_size(card->func, size);
 364
 365         ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
 366         if (ret)
 367                 goto out;
 368
 369         chunk = card->buffer[0] | (card->buffer[1] << 8);
 370         type = card->buffer[2] | (card->buffer[3] << 8);
 371
 372         lbs_deb_sdio("packet of type %d and size %d bytes\n",
 373                 (int)type, (int)chunk);
 374
 375         if (chunk > size) {
 376                 lbs_deb_sdio("packet fragment (%d > %d)\n",
 377                         (int)chunk, (int)size);
 378                 ret = -EINVAL;
 379                 goto out;
 380         }
 381
 382         if (chunk < size) {
 383                 lbs_deb_sdio("packet fragment (%d < %d)\n",
 384                         (int)chunk, (int)size);
 385         }
 386
 387         switch (type) {
 388         case MVMS_CMD:
 389                 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
 390                 if (ret)
 391                         goto out;
 392                 break;
 393         case MVMS_DAT:
 394                 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
 395                 if (ret)
 396                         goto out;
 397                 break;
 398         case MVMS_EVENT:
 399                 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
 400                 if (ret)
 401                         goto out;
 402                 break;
 403         default:
 404                 lbs_deb_sdio("invalid type (%d) from firmware\n",
 405                                 (int)type);
 406                 ret = -EINVAL;
 407                 goto out;
 408         }
 409
 410 out:
 411         if (ret)
 412                 lbs_pr_err("problem fetching packet from firmware\n");
 413
 414         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 415
 416         return ret;
 417 }
 418
 419 static void if_sdio_host_to_card_worker(struct work_struct *work)
 420 {
 421         struct if_sdio_card *card;
 422         struct if_sdio_packet *packet;
 423         int ret;
 424         unsigned long flags;
 425
 426         lbs_deb_enter(LBS_DEB_SDIO);
 427
 428         card = container_of(work, struct if_sdio_card, packet_worker);
 429
 430         while (1) {
 431                 spin_lock_irqsave(&card->lock, flags);
 432                 packet = card->packets;
 433                 if (packet)
 434                         card->packets = packet->next;
 435                 spin_unlock_irqrestore(&card->lock, flags);
 436
 437                 if (!packet)
 438                         break;
 439
 440                 sdio_claim_host(card->func);
 441
 442                 ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
 443                 if (ret == 0) {
 444                         ret = sdio_writesb(card->func, card->ioport,
 445                                            packet->buffer, packet->nb);
 446                 }
 447
 448                 if (ret)
 449                         lbs_pr_err("error %d sending packet to firmware\n", ret);
 450
 451                 sdio_release_host(card->func);
 452
 453                 kfree(packet);
 454         }
 455
 456         lbs_deb_leave(LBS_DEB_SDIO);
 457 }
 458
 459 /********************************************************************/
 460 /* Firmware                                                         */
 461 /********************************************************************/
 462
 463 #define FW_DL_READY_STATUS (IF_SDIO_IO_RDY | IF_SDIO_DL_RDY)
 464
 465 static int if_sdio_prog_helper(struct if_sdio_card *card,
 466                                 const struct firmware *fw)
 467 {
 468         int ret;
 469         unsigned long timeout;
 470         u8 *chunk_buffer;
 471         u32 chunk_size;
 472         const u8 *firmware;
 473         size_t size;
 474
 475         lbs_deb_enter(LBS_DEB_SDIO);
 476
 477         chunk_buffer = kzalloc(64, GFP_KERNEL);
 478         if (!chunk_buffer) {
 479                 ret = -ENOMEM;
 480                 goto out;
 481         }
 482
 483         sdio_claim_host(card->func);
 484
 485         ret = sdio_set_block_size(card->func, 32);
 486         if (ret)
 487                 goto release;
 488
 489         firmware = fw->data;
 490         size = fw->size;
 491
 492         while (size) {
 493                 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
 494                 if (ret)
 495                         goto release;
 496
 497                 /* On some platforms (like Davinci) the chip needs more time
 498                  * between helper blocks.
 499                  */
 500                 mdelay(2);
 501
 502                 chunk_size = min(size, (size_t)60);
 503
 504                 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
 505                 memcpy(chunk_buffer + 4, firmware, chunk_size);
 506 /*
 507                 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
 508 */
 509                 ret = sdio_writesb(card->func, card->ioport,
 510                                 chunk_buffer, 64);
 511                 if (ret)
 512                         goto release;
 513
 514                 firmware += chunk_size;
 515                 size -= chunk_size;
 516         }
 517
 518         /* an empty block marks the end of the transfer */
 519         memset(chunk_buffer, 0, 4);
 520         ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
 521         if (ret)
 522                 goto release;
 523
 524         lbs_deb_sdio("waiting for helper to boot...\n");
 525
 526         /* wait for the helper to boot by looking at the size register */
 527         timeout = jiffies + HZ;
 528         while (1) {
 529                 u16 req_size;
 530
 531                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 532                 if (ret)
 533                         goto release;
 534
 535                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 536                 if (ret)
 537                         goto release;
 538
 539                 if (req_size != 0)
 540                         break;
 541
 542                 if (time_after(jiffies, timeout)) {
 543                         ret = -ETIMEDOUT;
 544                         goto release;
 545                 }
 546
 547                 msleep(10);
 548         }
 549
 550         ret = 0;
 551
 552 release:
 553         sdio_release_host(card->func);
 554         kfree(chunk_buffer);
 555
 556 out:
 557         if (ret)
 558                 lbs_pr_err("failed to load helper firmware\n");
 559
 560         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 561         return ret;
 562 }
 563
 564 static int if_sdio_prog_real(struct if_sdio_card *card,
 565                                 const struct firmware *fw)
 566 {
 567         int ret;
 568         unsigned long timeout;
 569         u8 *chunk_buffer;
 570         u32 chunk_size;
 571         const u8 *firmware;
 572         size_t size, req_size;
 573
 574         lbs_deb_enter(LBS_DEB_SDIO);
 575
 576         chunk_buffer = kzalloc(512, GFP_KERNEL);
 577         if (!chunk_buffer) {
 578                 ret = -ENOMEM;
 579                 goto out;
 580         }
 581
 582         sdio_claim_host(card->func);
 583
 584         ret = sdio_set_block_size(card->func, 32);
 585         if (ret)
 586                 goto release;
 587
 588         firmware = fw->data;
 589         size = fw->size;
 590
 591         while (size) {
 592                 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
 593                 if (ret)
 594                         goto release;
 595
 596                 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
 597                 if (ret)
 598                         goto release;
 599
 600                 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
 601                 if (ret)
 602                         goto release;
 603 /*
 604                 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
 605 */
 606                 if (req_size == 0) {
 607                         lbs_deb_sdio("firmware helper gave up early\n");
 608                         ret = -EIO;
 609                         goto release;
 610                 }
 611
 612                 if (req_size & 0x01) {
 613                         lbs_deb_sdio("firmware helper signalled error\n");
 614                         ret = -EIO;
 615                         goto release;
 616                 }
 617
 618                 if (req_size > size)
 619                         req_size = size;
 620
 621                 while (req_size) {
 622                         chunk_size = min(req_size, (size_t)512);
 623
 624                         memcpy(chunk_buffer, firmware, chunk_size);
 625 /*
 626                         lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
 627                                 chunk_size, (chunk_size + 31) / 32 * 32);
 628 */
 629                         ret = sdio_writesb(card->func, card->ioport,
 630                                 chunk_buffer, roundup(chunk_size, 32));
 631                         if (ret)
 632                                 goto release;
 633
 634                         firmware += chunk_size;
 635                         size -= chunk_size;
 636                         req_size -= chunk_size;
 637                 }
 638         }
 639
 640         ret = 0;
 641
 642         lbs_deb_sdio("waiting for firmware to boot...\n");
 643
 644         /* wait for the firmware to boot */
 645         timeout = jiffies + HZ;
 646         while (1) {
 647                 u16 scratch;
 648
 649                 scratch = if_sdio_read_scratch(card, &ret);
 650                 if (ret)
 651                         goto release;
 652
 653                 if (scratch == IF_SDIO_FIRMWARE_OK)
 654                         break;
 655
 656                 if (time_after(jiffies, timeout)) {
 657                         ret = -ETIMEDOUT;
 658                         goto release;
 659                 }
 660
 661                 msleep(10);
 662         }
 663
 664         ret = 0;
 665
 666 release:
 667         sdio_release_host(card->func);
 668         kfree(chunk_buffer);
 669
 670 out:
 671         if (ret)
 672                 lbs_pr_err("failed to load firmware\n");
 673
 674         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 675         return ret;
 676 }
 677
 678 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 679 {
 680         int ret;
 681         u16 scratch;
 682         const struct firmware *helper = NULL;
 683         const struct firmware *mainfw = NULL;
 684
 685         lbs_deb_enter(LBS_DEB_SDIO);
 686
 687         sdio_claim_host(card->func);
 688         scratch = if_sdio_read_scratch(card, &ret);
 689         sdio_release_host(card->func);
 690
 691         if (ret)
 692                 goto out;
 693
 694         lbs_deb_sdio("firmware status = %#x\n", scratch);
 695
 696         if (scratch == IF_SDIO_FIRMWARE_OK) {
 697                 lbs_deb_sdio("firmware already loaded\n");
 698                 goto success;
 699         }
 700
 701         ret = lbs_get_firmware(&card->func->dev, lbs_helper_name, lbs_fw_name,
 702                                 card->model, &fw_table[0], &helper, &mainfw);
 703         if (ret) {
 704                 lbs_pr_err("failed to find firmware (%d)\n", ret);
 705                 goto out;
 706         }
 707
 708         ret = if_sdio_prog_helper(card, helper);
 709         if (ret)
 710                 goto out;
 711
 712         ret = if_sdio_prog_real(card, mainfw);
 713         if (ret)
 714                 goto out;
 715
 716 success:
 717         sdio_claim_host(card->func);
 718         sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
 719         sdio_release_host(card->func);
 720         ret = 0;
 721
 722 out:
 723         if (helper)
 724                 release_firmware(helper);
 725         if (mainfw)
 726                 release_firmware(mainfw);
 727
 728         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 729         return ret;
 730 }
 731
 732 /*******************************************************************/
 733 /* Libertas callbacks                                              */
 734 /*******************************************************************/
 735
 736 static int if_sdio_host_to_card(struct lbs_private *priv,
 737                 u8 type, u8 *buf, u16 nb)
 738 {
 739         int ret;
 740         struct if_sdio_card *card;
 741         struct if_sdio_packet *packet, *cur;
 742         u16 size;
 743         unsigned long flags;
 744
 745         lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
 746
 747         card = priv->card;
 748
 749         if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
 750                 ret = -EINVAL;
 751                 goto out;
 752         }
 753
 754         /*
 755          * The transfer must be in one transaction or the firmware
 756          * goes suicidal. There's no way to guarantee that for all
 757          * controllers, but we can at least try.
 758          */
 759         size = sdio_align_size(card->func, nb + 4);
 760
 761         packet = kzalloc(sizeof(struct if_sdio_packet) + size,
 762                         GFP_ATOMIC);
 763         if (!packet) {
 764                 ret = -ENOMEM;
 765                 goto out;
 766         }
 767
 768         packet->next = NULL;
 769         packet->nb = size;
 770
 771         /*
 772          * SDIO specific header.
 773          */
 774         packet->buffer[0] = (nb + 4) & 0xff;
 775         packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
 776         packet->buffer[2] = type;
 777         packet->buffer[3] = 0;
 778
 779         memcpy(packet->buffer + 4, buf, nb);
 780
 781         spin_lock_irqsave(&card->lock, flags);
 782
 783         if (!card->packets)
 784                 card->packets = packet;
 785         else {
 786                 cur = card->packets;
 787                 while (cur->next)
 788                         cur = cur->next;
 789                 cur->next = packet;
 790         }
 791
 792         switch (type) {
 793         case MVMS_CMD:
 794                 priv->dnld_sent = DNLD_CMD_SENT;
 795                 break;
 796         case MVMS_DAT:
 797                 priv->dnld_sent = DNLD_DATA_SENT;
 798                 break;
 799         default:
 800                 lbs_deb_sdio("unknown packet type %d\n", (int)type);
 801         }
 802
 803         spin_unlock_irqrestore(&card->lock, flags);
 804
 805         queue_work(card->workqueue, &card->packet_worker);
 806
 807         ret = 0;
 808
 809 out:
 810         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 811
 812         return ret;
 813 }
 814
 815 static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
 816 {
 817         int ret = -1;
 818         struct cmd_header cmd;
 819
 820         memset(&cmd, 0, sizeof(cmd));
 821
 822         lbs_deb_sdio("send DEEP_SLEEP command\n");
 823         ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
 824                         lbs_cmd_copyback, (unsigned long) &cmd);
 825         if (ret)
 826                 lbs_pr_err("DEEP_SLEEP cmd failed\n");
 827
 828         mdelay(200);
 829         return ret;
 830 }
 831
 832 static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
 833 {
 834         struct if_sdio_card *card = priv->card;
 835         int ret = -1;
 836
 837         lbs_deb_enter(LBS_DEB_SDIO);
 838         sdio_claim_host(card->func);
 839
 840         sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
 841         if (ret)
 842                 lbs_pr_err("sdio_writeb failed!\n");
 843
 844         sdio_release_host(card->func);
 845         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 846         return ret;
 847 }
 848
 849 static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
 850 {
 851         struct if_sdio_card *card = priv->card;
 852         int ret = -1;
 853
 854         lbs_deb_enter(LBS_DEB_SDIO);
 855         sdio_claim_host(card->func);
 856
 857         sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
 858         if (ret)
 859                 lbs_pr_err("sdio_writeb failed!\n");
 860
 861         sdio_release_host(card->func);
 862         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 863         return ret;
 864
 865 }
 866
 867 /*******************************************************************/
 868 /* SDIO callbacks                                                  */
 869 /*******************************************************************/
 870
 871 static void if_sdio_interrupt(struct sdio_func *func)
 872 {
 873         int ret;
 874         struct if_sdio_card *card;
 875         u8 cause;
 876
 877         lbs_deb_enter(LBS_DEB_SDIO);
 878
 879         card = sdio_get_drvdata(func);
 880
 881         cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
 882         if (ret)
 883                 goto out;
 884
 885         lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
 886
 887         sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
 888         if (ret)
 889                 goto out;
 890
 891         /*
 892          * Ignore the define name, this really means the card has
 893          * successfully received the command.
 894          */
 895         card->priv->is_activity_detected = 1;
 896         if (cause & IF_SDIO_H_INT_DNLD)
 897                 lbs_host_to_card_done(card->priv);
 898
 899
 900         if (cause & IF_SDIO_H_INT_UPLD) {
 901                 ret = if_sdio_card_to_host(card);
 902                 if (ret)
 903                         goto out;
 904         }
 905
 906         ret = 0;
 907
 908 out:
 909         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
 910 }
 911
 912 static int if_sdio_probe(struct sdio_func *func,
 913                 const struct sdio_device_id *id)
 914 {
 915         struct if_sdio_card *card;
 916         struct lbs_private *priv;
 917         int ret, i;
 918         unsigned int model;
 919         struct if_sdio_packet *packet;
 920         struct mmc_host *host = func->card->host;
 921
 922         lbs_deb_enter(LBS_DEB_SDIO);
 923
 924         for (i = 0;i < func->card->num_info;i++) {
 925                 if (sscanf(func->card->info[i],
 926                                 "802.11 SDIO ID: %x", &model) == 1)
 927                         break;
 928                 if (sscanf(func->card->info[i],
 929                                 "ID: %x", &model) == 1)
 930                         break;
 931                 if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
 932                         model = MODEL_8385;
 933                         break;
 934                 }
 935         }
 936
 937         if (i == func->card->num_info) {
 938                 lbs_pr_err("unable to identify card model\n");
 939                 return -ENODEV;
 940         }
 941
 942         card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
 943         if (!card)
 944                 return -ENOMEM;
 945
 946         card->func = func;
 947         card->model = model;
 948
 949         switch (card->model) {
 950         case MODEL_8385:
 951                 card->scratch_reg = IF_SDIO_SCRATCH_OLD;
 952                 break;
 953         case MODEL_8686:
 954                 card->scratch_reg = IF_SDIO_SCRATCH;
 955                 break;
 956         case MODEL_8688:
 957         default: /* for newer chipsets */
 958                 card->scratch_reg = IF_SDIO_FW_STATUS;
 959                 break;
 960         }
 961
 962         spin_lock_init(&card->lock);
 963         card->workqueue = create_workqueue("libertas_sdio");
 964         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
 965
 966         /* Check if we support this card */
 967         for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
 968                 if (card->model == fw_table[i].model)
 969                         break;
 970         }
 971         if (i == ARRAY_SIZE(fw_table)) {
 972                 lbs_pr_err("unknown card model 0x%x\n", card->model);
 973                 ret = -ENODEV;
 974                 goto free;
 975         }
 976
 977         sdio_claim_host(func);
 978
 979         ret = sdio_enable_func(func);
 980         if (ret)
 981                 goto release;
 982
 983         ret = sdio_claim_irq(func, if_sdio_interrupt);
 984         if (ret)
 985                 goto disable;
 986
 987         /* For 1-bit transfers to the 8686 model, we need to enable the
 988          * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
 989          * bit to allow access to non-vendor registers. */
 990         if ((card->model == MODEL_8686) &&
 991             (host->caps & MMC_CAP_SDIO_IRQ) &&
 992             (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
 993                 u8 reg;
 994
 995                 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 996                 reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
 997                 if (ret)
 998                         goto release_int;
 999
1000                 reg |= SDIO_BUS_ECSI;
1001                 sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
1002                 if (ret)
1003                         goto release_int;
1004         }
1005
1006         card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
1007         if (ret)
1008                 goto release_int;
1009
1010         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
1011         if (ret)
1012                 goto release_int;
1013
1014         card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
1015         if (ret)
1016                 goto release_int;
1017
1018         sdio_release_host(func);
1019
1020         sdio_set_drvdata(func, card);
1021
1022         lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
1023                         "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
1024                         func->class, func->vendor, func->device,
1025                         model, (unsigned)card->ioport);
1026
1027         ret = if_sdio_prog_firmware(card);
1028         if (ret)
1029                 goto reclaim;
1030
1031         priv = lbs_add_card(card, &func->dev);
1032         if (!priv) {
1033                 ret = -ENOMEM;
1034                 goto reclaim;
1035         }
1036
1037         card->priv = priv;
1038
1039         priv->card = card;
1040         priv->hw_host_to_card = if_sdio_host_to_card;
1041         priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
1042         priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
1043         priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
1044
1045         priv->fw_ready = 1;
1046
1047         sdio_claim_host(func);
1048
1049         /*
1050          * Get rx_unit if the chip is SD8688 or newer.
1051          * SD8385 & SD8686 do not have rx_unit.
1052          */
1053         if ((card->model != MODEL_8385)
1054                         && (card->model != MODEL_8686))
1055                 card->rx_unit = if_sdio_read_rx_unit(card);
1056         else
1057                 card->rx_unit = 0;
1058
1059         /*
1060          * Enable interrupts now that everything is set up
1061          */
1062         sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
1063         sdio_release_host(func);
1064         if (ret)
1065                 goto reclaim;
1066
1067         /*
1068          * FUNC_INIT is required for SD8688 WLAN/BT multiple functions
1069          */
1070         if (card->model == MODEL_8688) {
1071                 struct cmd_header cmd;
1072
1073                 memset(&cmd, 0, sizeof(cmd));
1074
1075                 lbs_deb_sdio("send function INIT command\n");
1076                 if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
1077                                 lbs_cmd_copyback, (unsigned long) &cmd))
1078                         lbs_pr_alert("CMD_FUNC_INIT cmd failed\n");
1079         }
1080
1081         ret = lbs_start_card(priv);
1082         if (ret)
1083                 goto err_activate_card;
1084
1085 out:
1086         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1087
1088         return ret;
1089
1090 err_activate_card:
1091         flush_workqueue(card->workqueue);
1092         lbs_remove_card(priv);
1093 reclaim:
1094         sdio_claim_host(func);
1095 release_int:
1096         sdio_release_irq(func);
1097 disable:
1098         sdio_disable_func(func);
1099 release:
1100         sdio_release_host(func);
1101 free:
1102         destroy_workqueue(card->workqueue);
1103         while (card->packets) {
1104                 packet = card->packets;
1105                 card->packets = card->packets->next;
1106                 kfree(packet);
1107         }
1108
1109         if (card->helper_allocated)
1110                 kfree(card->helper);
1111         if (card->firmware_allocated)
1112                 kfree(card->firmware);
1113         kfree(card);
1114
1115         goto out;
1116 }
1117
1118 static void if_sdio_remove(struct sdio_func *func)
1119 {
1120         struct if_sdio_card *card;
1121         struct if_sdio_packet *packet;
1122
1123         lbs_deb_enter(LBS_DEB_SDIO);
1124
1125         card = sdio_get_drvdata(func);
1126
1127         if (user_rmmod && (card->model == MODEL_8688)) {
1128                 /*
1129                  * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
1130                  * multiple functions
1131                  */
1132                 struct cmd_header cmd;
1133
1134                 memset(&cmd, 0, sizeof(cmd));
1135
1136                 lbs_deb_sdio("send function SHUTDOWN command\n");
1137                 if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
1138                                 &cmd, sizeof(cmd), lbs_cmd_copyback,
1139                                 (unsigned long) &cmd))
1140                         lbs_pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
1141         }
1142
1143
1144         lbs_deb_sdio("call remove card\n");
1145         lbs_stop_card(card->priv);
1146         lbs_remove_card(card->priv);
1147         card->priv->surpriseremoved = 1;
1148
1149         flush_workqueue(card->workqueue);
1150         destroy_workqueue(card->workqueue);
1151
1152         sdio_claim_host(func);
1153         sdio_release_irq(func);
1154         sdio_disable_func(func);
1155         sdio_release_host(func);
1156
1157         while (card->packets) {
1158                 packet = card->packets;
1159                 card->packets = card->packets->next;
1160                 kfree(packet);
1161         }
1162
1163         if (card->helper_allocated)
1164                 kfree(card->helper);
1165         if (card->firmware_allocated)
1166                 kfree(card->firmware);
1167         kfree(card);
1168
1169         lbs_deb_leave(LBS_DEB_SDIO);
1170 }
1171
1172 static int if_sdio_suspend(struct device *dev)
1173 {
1174         struct sdio_func *func = dev_to_sdio_func(dev);
1175         int ret;
1176         struct if_sdio_card *card = sdio_get_drvdata(func);
1177
1178         mmc_pm_flag_t flags = sdio_get_host_pm_caps(func);
1179
1180         lbs_pr_info("%s: suspend: PM flags = 0x%x\n",
1181                                                 sdio_func_id(func), flags);
1182
1183         /* If we aren't being asked to wake on anything, we should bail out
1184          * and let the SD stack power down the card.
1185          */
1186         if (card->priv->wol_criteria == EHS_REMOVE_WAKEUP) {
1187                 lbs_pr_info("Suspend without wake params -- "
1188                                                 "powering down card.");
1189                 return -ENOSYS;
1190         }
1191
1192         if (!(flags & MMC_PM_KEEP_POWER)) {
1193                 lbs_pr_err("%s: cannot remain alive while host is suspended\n",
1194                         sdio_func_id(func));
1195                 return -ENOSYS;
1196         }
1197
1198         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1199         if (ret)
1200                 return ret;
1201
1202         ret = lbs_suspend(card->priv);
1203         if (ret)
1204                 return ret;
1205
1206         return sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
1207 }
1208
1209 static int if_sdio_resume(struct device *dev)
1210 {
1211         struct sdio_func *func = dev_to_sdio_func(dev);
1212         struct if_sdio_card *card = sdio_get_drvdata(func);
1213         int ret;
1214
1215         lbs_pr_info("%s: resume: we're back\n", sdio_func_id(func));
1216
1217         ret = lbs_resume(card->priv);
1218
1219         return ret;
1220 }
1221
1222 static const struct dev_pm_ops if_sdio_pm_ops = {
1223         .suspend        = if_sdio_suspend,
1224         .resume         = if_sdio_resume,
1225 };
1226
1227 static struct sdio_driver if_sdio_driver = {
1228         .name           = "libertas_sdio",
1229         .id_table       = if_sdio_ids,
1230         .probe          = if_sdio_probe,
1231         .remove         = if_sdio_remove,
1232         .drv = {
1233                 .pm = &if_sdio_pm_ops,
1234         },
1235 };
1236
1237 /*******************************************************************/
1238 /* Module functions                                                */
1239 /*******************************************************************/
1240
1241 static int __init if_sdio_init_module(void)
1242 {
1243         int ret = 0;
1244
1245         lbs_deb_enter(LBS_DEB_SDIO);
1246
1247         printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1248         printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1249
1250         ret = sdio_register_driver(&if_sdio_driver);
1251
1252         /* Clear the flag in case user removes the card. */
1253         user_rmmod = 0;
1254
1255         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
1256
1257         return ret;
1258 }
1259
1260 static void __exit if_sdio_exit_module(void)
1261 {
1262         lbs_deb_enter(LBS_DEB_SDIO);
1263
1264         /* Set the flag as user is removing this module. */
1265         user_rmmod = 1;
1266
1267         sdio_unregister_driver(&if_sdio_driver);
1268
1269         lbs_deb_leave(LBS_DEB_SDIO);
1270 }
1271
1272 module_init(if_sdio_init_module);
1273 module_exit(if_sdio_exit_module);
1274
1275 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1276 MODULE_AUTHOR("Pierre Ossman");
1277 MODULE_LICENSE("GPL");