linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
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   1// SPDX-License-Identifier: ISC
   2/*
   3 * Copyright (c) 2011 Broadcom Corporation
   4 */
   5
   6#include <linux/kernel.h>
   7#include <linux/module.h>
   8#include <linux/firmware.h>
   9#include <linux/usb.h>
  10#include <linux/vmalloc.h>
  11
  12#include <brcmu_utils.h>
  13#include <brcm_hw_ids.h>
  14#include <brcmu_wifi.h>
  15#include "bus.h"
  16#include "debug.h"
  17#include "firmware.h"
  18#include "usb.h"
  19#include "core.h"
  20#include "common.h"
  21#include "bcdc.h"
  22
  23
  24#define IOCTL_RESP_TIMEOUT              msecs_to_jiffies(2000)
  25
  26#define BRCMF_USB_RESET_GETVER_SPINWAIT 100     /* in unit of ms */
  27#define BRCMF_USB_RESET_GETVER_LOOP_CNT 10
  28
  29#define BRCMF_POSTBOOT_ID               0xA123  /* ID to detect if dongle
  30                                                   has boot up */
  31#define BRCMF_USB_NRXQ                  50
  32#define BRCMF_USB_NTXQ                  50
  33
  34#define BRCMF_USB_CBCTL_WRITE           0
  35#define BRCMF_USB_CBCTL_READ            1
  36#define BRCMF_USB_MAX_PKT_SIZE          1600
  37
  38BRCMF_FW_DEF(43143, "brcmfmac43143");
  39BRCMF_FW_DEF(43236B, "brcmfmac43236b");
  40BRCMF_FW_DEF(43242A, "brcmfmac43242a");
  41BRCMF_FW_DEF(43569, "brcmfmac43569");
  42BRCMF_FW_DEF(4373, "brcmfmac4373");
  43
  44static const struct brcmf_firmware_mapping brcmf_usb_fwnames[] = {
  45        BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
  46        BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B),
  47        BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B),
  48        BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B),
  49        BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A),
  50        BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569),
  51        BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569),
  52        BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
  53};
  54
  55#define TRX_MAGIC               0x30524448      /* "HDR0" */
  56#define TRX_MAX_OFFSET          3               /* Max number of file offsets */
  57#define TRX_UNCOMP_IMAGE        0x20            /* Trx holds uncompressed img */
  58#define TRX_RDL_CHUNK           1500            /* size of each dl transfer */
  59#define TRX_OFFSETS_DLFWLEN_IDX 0
  60
  61/* Control messages: bRequest values */
  62#define DL_GETSTATE     0       /* returns the rdl_state_t struct */
  63#define DL_CHECK_CRC    1       /* currently unused */
  64#define DL_GO           2       /* execute downloaded image */
  65#define DL_START        3       /* initialize dl state */
  66#define DL_REBOOT       4       /* reboot the device in 2 seconds */
  67#define DL_GETVER       5       /* returns the bootrom_id_t struct */
  68#define DL_GO_PROTECTED 6       /* execute the downloaded code and set reset
  69                                 * event to occur in 2 seconds.  It is the
  70                                 * responsibility of the downloaded code to
  71                                 * clear this event
  72                                 */
  73#define DL_EXEC         7       /* jump to a supplied address */
  74#define DL_RESETCFG     8       /* To support single enum on dongle
  75                                 * - Not used by bootloader
  76                                 */
  77#define DL_DEFER_RESP_OK 9      /* Potentially defer the response to setup
  78                                 * if resp unavailable
  79                                 */
  80
  81/* states */
  82#define DL_WAITING      0       /* waiting to rx first pkt */
  83#define DL_READY        1       /* hdr was good, waiting for more of the
  84                                 * compressed image
  85                                 */
  86#define DL_BAD_HDR      2       /* hdr was corrupted */
  87#define DL_BAD_CRC      3       /* compressed image was corrupted */
  88#define DL_RUNNABLE     4       /* download was successful,waiting for go cmd */
  89#define DL_START_FAIL   5       /* failed to initialize correctly */
  90#define DL_NVRAM_TOOBIG 6       /* host specified nvram data exceeds DL_NVRAM
  91                                 * value
  92                                 */
  93#define DL_IMAGE_TOOBIG 7       /* firmware image too big */
  94
  95
  96struct trx_header_le {
  97        __le32 magic;           /* "HDR0" */
  98        __le32 len;             /* Length of file including header */
  99        __le32 crc32;           /* CRC from flag_version to end of file */
 100        __le32 flag_version;    /* 0:15 flags, 16:31 version */
 101        __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of
 102                                         * header
 103                                         */
 104};
 105
 106struct rdl_state_le {
 107        __le32 state;
 108        __le32 bytes;
 109};
 110
 111struct bootrom_id_le {
 112        __le32 chip;            /* Chip id */
 113        __le32 chiprev;         /* Chip rev */
 114        __le32 ramsize;         /* Size of  RAM */
 115        __le32 remapbase;       /* Current remap base address */
 116        __le32 boardtype;       /* Type of board */
 117        __le32 boardrev;        /* Board revision */
 118};
 119
 120struct brcmf_usb_image {
 121        struct list_head list;
 122        s8 *fwname;
 123        u8 *image;
 124        int image_len;
 125};
 126
 127struct brcmf_usbdev_info {
 128        struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
 129        spinlock_t qlock;
 130        struct list_head rx_freeq;
 131        struct list_head rx_postq;
 132        struct list_head tx_freeq;
 133        struct list_head tx_postq;
 134        uint rx_pipe, tx_pipe;
 135
 136        int rx_low_watermark;
 137        int tx_low_watermark;
 138        int tx_high_watermark;
 139        int tx_freecount;
 140        bool tx_flowblock;
 141        spinlock_t tx_flowblock_lock;
 142
 143        struct brcmf_usbreq *tx_reqs;
 144        struct brcmf_usbreq *rx_reqs;
 145
 146        char fw_name[BRCMF_FW_NAME_LEN];
 147        const u8 *image;        /* buffer for combine fw and nvram */
 148        int image_len;
 149
 150        struct usb_device *usbdev;
 151        struct device *dev;
 152        struct completion dev_init_done;
 153
 154        int ctl_in_pipe, ctl_out_pipe;
 155        struct urb *ctl_urb; /* URB for control endpoint */
 156        struct usb_ctrlrequest ctl_write;
 157        struct usb_ctrlrequest ctl_read;
 158        u32 ctl_urb_actual_length;
 159        int ctl_urb_status;
 160        int ctl_completed;
 161        wait_queue_head_t ioctl_resp_wait;
 162        ulong ctl_op;
 163        u8 ifnum;
 164
 165        struct urb *bulk_urb; /* used for FW download */
 166
 167        bool wowl_enabled;
 168        struct brcmf_mp_device *settings;
 169};
 170
 171static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 172                                struct brcmf_usbreq  *req);
 173
 174static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
 175{
 176        struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 177        return bus_if->bus_priv.usb;
 178}
 179
 180static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
 181{
 182        return brcmf_usb_get_buspub(dev)->devinfo;
 183}
 184
 185static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
 186{
 187        return wait_event_timeout(devinfo->ioctl_resp_wait,
 188                                  devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
 189}
 190
 191static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
 192{
 193        wake_up(&devinfo->ioctl_resp_wait);
 194}
 195
 196static void
 197brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
 198{
 199        brcmf_dbg(USB, "Enter, status=%d\n", status);
 200
 201        if (unlikely(devinfo == NULL))
 202                return;
 203
 204        if (type == BRCMF_USB_CBCTL_READ) {
 205                if (status == 0)
 206                        devinfo->bus_pub.stats.rx_ctlpkts++;
 207                else
 208                        devinfo->bus_pub.stats.rx_ctlerrs++;
 209        } else if (type == BRCMF_USB_CBCTL_WRITE) {
 210                if (status == 0)
 211                        devinfo->bus_pub.stats.tx_ctlpkts++;
 212                else
 213                        devinfo->bus_pub.stats.tx_ctlerrs++;
 214        }
 215
 216        devinfo->ctl_urb_status = status;
 217        devinfo->ctl_completed = true;
 218        brcmf_usb_ioctl_resp_wake(devinfo);
 219}
 220
 221static void
 222brcmf_usb_ctlread_complete(struct urb *urb)
 223{
 224        struct brcmf_usbdev_info *devinfo =
 225                (struct brcmf_usbdev_info *)urb->context;
 226
 227        brcmf_dbg(USB, "Enter\n");
 228        devinfo->ctl_urb_actual_length = urb->actual_length;
 229        brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
 230                urb->status);
 231}
 232
 233static void
 234brcmf_usb_ctlwrite_complete(struct urb *urb)
 235{
 236        struct brcmf_usbdev_info *devinfo =
 237                (struct brcmf_usbdev_info *)urb->context;
 238
 239        brcmf_dbg(USB, "Enter\n");
 240        brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
 241                urb->status);
 242}
 243
 244static int
 245brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 246{
 247        int ret;
 248        u16 size;
 249
 250        brcmf_dbg(USB, "Enter\n");
 251        if (devinfo == NULL || buf == NULL ||
 252            len == 0 || devinfo->ctl_urb == NULL)
 253                return -EINVAL;
 254
 255        size = len;
 256        devinfo->ctl_write.wLength = cpu_to_le16p(&size);
 257        devinfo->ctl_urb->transfer_buffer_length = size;
 258        devinfo->ctl_urb_status = 0;
 259        devinfo->ctl_urb_actual_length = 0;
 260
 261        usb_fill_control_urb(devinfo->ctl_urb,
 262                devinfo->usbdev,
 263                devinfo->ctl_out_pipe,
 264                (unsigned char *) &devinfo->ctl_write,
 265                buf, size,
 266                (usb_complete_t)brcmf_usb_ctlwrite_complete,
 267                devinfo);
 268
 269        ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 270        if (ret < 0)
 271                brcmf_err("usb_submit_urb failed %d\n", ret);
 272
 273        return ret;
 274}
 275
 276static int
 277brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 278{
 279        int ret;
 280        u16 size;
 281
 282        brcmf_dbg(USB, "Enter\n");
 283        if ((devinfo == NULL) || (buf == NULL) || (len == 0)
 284                || (devinfo->ctl_urb == NULL))
 285                return -EINVAL;
 286
 287        size = len;
 288        devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 289        devinfo->ctl_urb->transfer_buffer_length = size;
 290
 291        devinfo->ctl_read.bRequestType = USB_DIR_IN
 292                | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 293        devinfo->ctl_read.bRequest = 1;
 294
 295        usb_fill_control_urb(devinfo->ctl_urb,
 296                devinfo->usbdev,
 297                devinfo->ctl_in_pipe,
 298                (unsigned char *) &devinfo->ctl_read,
 299                buf, size,
 300                (usb_complete_t)brcmf_usb_ctlread_complete,
 301                devinfo);
 302
 303        ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 304        if (ret < 0)
 305                brcmf_err("usb_submit_urb failed %d\n", ret);
 306
 307        return ret;
 308}
 309
 310static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 311{
 312        int err = 0;
 313        int timeout = 0;
 314        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 315
 316        brcmf_dbg(USB, "Enter\n");
 317        if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
 318                return -EIO;
 319
 320        if (test_and_set_bit(0, &devinfo->ctl_op))
 321                return -EIO;
 322
 323        devinfo->ctl_completed = false;
 324        err = brcmf_usb_send_ctl(devinfo, buf, len);
 325        if (err) {
 326                brcmf_err("fail %d bytes: %d\n", err, len);
 327                clear_bit(0, &devinfo->ctl_op);
 328                return err;
 329        }
 330        timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 331        clear_bit(0, &devinfo->ctl_op);
 332        if (!timeout) {
 333                brcmf_err("Txctl wait timed out\n");
 334                err = -EIO;
 335        }
 336        return err;
 337}
 338
 339static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 340{
 341        int err = 0;
 342        int timeout = 0;
 343        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 344
 345        brcmf_dbg(USB, "Enter\n");
 346        if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
 347                return -EIO;
 348
 349        if (test_and_set_bit(0, &devinfo->ctl_op))
 350                return -EIO;
 351
 352        devinfo->ctl_completed = false;
 353        err = brcmf_usb_recv_ctl(devinfo, buf, len);
 354        if (err) {
 355                brcmf_err("fail %d bytes: %d\n", err, len);
 356                clear_bit(0, &devinfo->ctl_op);
 357                return err;
 358        }
 359        timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 360        err = devinfo->ctl_urb_status;
 361        clear_bit(0, &devinfo->ctl_op);
 362        if (!timeout) {
 363                brcmf_err("rxctl wait timed out\n");
 364                err = -EIO;
 365        }
 366        if (!err)
 367                return devinfo->ctl_urb_actual_length;
 368        else
 369                return err;
 370}
 371
 372static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
 373                                          struct list_head *q, int *counter)
 374{
 375        unsigned long flags;
 376        struct brcmf_usbreq  *req;
 377        spin_lock_irqsave(&devinfo->qlock, flags);
 378        if (list_empty(q)) {
 379                spin_unlock_irqrestore(&devinfo->qlock, flags);
 380                return NULL;
 381        }
 382        req = list_entry(q->next, struct brcmf_usbreq, list);
 383        list_del_init(q->next);
 384        if (counter)
 385                (*counter)--;
 386        spin_unlock_irqrestore(&devinfo->qlock, flags);
 387        return req;
 388
 389}
 390
 391static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
 392                          struct list_head *q, struct brcmf_usbreq *req,
 393                          int *counter)
 394{
 395        unsigned long flags;
 396        spin_lock_irqsave(&devinfo->qlock, flags);
 397        list_add_tail(&req->list, q);
 398        if (counter)
 399                (*counter)++;
 400        spin_unlock_irqrestore(&devinfo->qlock, flags);
 401}
 402
 403static struct brcmf_usbreq *
 404brcmf_usbdev_qinit(struct list_head *q, int qsize)
 405{
 406        int i;
 407        struct brcmf_usbreq *req, *reqs;
 408
 409        reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
 410        if (reqs == NULL)
 411                return NULL;
 412
 413        req = reqs;
 414
 415        for (i = 0; i < qsize; i++) {
 416                req->urb = usb_alloc_urb(0, GFP_ATOMIC);
 417                if (!req->urb)
 418                        goto fail;
 419
 420                INIT_LIST_HEAD(&req->list);
 421                list_add_tail(&req->list, q);
 422                req++;
 423        }
 424        return reqs;
 425fail:
 426        brcmf_err("fail!\n");
 427        while (!list_empty(q)) {
 428                req = list_entry(q->next, struct brcmf_usbreq, list);
 429                if (req)
 430                        usb_free_urb(req->urb);
 431                list_del(q->next);
 432        }
 433        return NULL;
 434
 435}
 436
 437static void brcmf_usb_free_q(struct list_head *q)
 438{
 439        struct brcmf_usbreq *req, *next;
 440
 441        list_for_each_entry_safe(req, next, q, list) {
 442                if (!req->urb) {
 443                        brcmf_err("bad req\n");
 444                        break;
 445                }
 446                usb_free_urb(req->urb);
 447                list_del_init(&req->list);
 448        }
 449}
 450
 451static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
 452                                struct brcmf_usbreq *req)
 453{
 454        unsigned long flags;
 455
 456        spin_lock_irqsave(&devinfo->qlock, flags);
 457        list_del_init(&req->list);
 458        spin_unlock_irqrestore(&devinfo->qlock, flags);
 459}
 460
 461
 462static void brcmf_usb_tx_complete(struct urb *urb)
 463{
 464        struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
 465        struct brcmf_usbdev_info *devinfo = req->devinfo;
 466        unsigned long flags;
 467
 468        brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
 469                  req->skb);
 470        brcmf_usb_del_fromq(devinfo, req);
 471
 472        brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0);
 473        req->skb = NULL;
 474        brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
 475        spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 476        if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
 477                devinfo->tx_flowblock) {
 478                brcmf_proto_bcdc_txflowblock(devinfo->dev, false);
 479                devinfo->tx_flowblock = false;
 480        }
 481        spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 482}
 483
 484static void brcmf_usb_rx_complete(struct urb *urb)
 485{
 486        struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
 487        struct brcmf_usbdev_info *devinfo = req->devinfo;
 488        struct sk_buff *skb;
 489
 490        brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
 491        brcmf_usb_del_fromq(devinfo, req);
 492        skb = req->skb;
 493        req->skb = NULL;
 494
 495        /* zero length packets indicate usb "failure". Do not refill */
 496        if (urb->status != 0 || !urb->actual_length) {
 497                brcmu_pkt_buf_free_skb(skb);
 498                brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 499                return;
 500        }
 501
 502        if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP) {
 503                skb_put(skb, urb->actual_length);
 504                brcmf_rx_frame(devinfo->dev, skb, true);
 505                brcmf_usb_rx_refill(devinfo, req);
 506        } else {
 507                brcmu_pkt_buf_free_skb(skb);
 508                brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 509        }
 510        return;
 511
 512}
 513
 514static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 515                                struct brcmf_usbreq  *req)
 516{
 517        struct sk_buff *skb;
 518        int ret;
 519
 520        if (!req || !devinfo)
 521                return;
 522
 523        skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
 524        if (!skb) {
 525                brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 526                return;
 527        }
 528        req->skb = skb;
 529
 530        usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
 531                          skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
 532                          req);
 533        req->devinfo = devinfo;
 534        brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
 535
 536        ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 537        if (ret) {
 538                brcmf_usb_del_fromq(devinfo, req);
 539                brcmu_pkt_buf_free_skb(req->skb);
 540                req->skb = NULL;
 541                brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 542        }
 543        return;
 544}
 545
 546static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
 547{
 548        struct brcmf_usbreq *req;
 549
 550        if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 551                brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
 552                return;
 553        }
 554        while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
 555                brcmf_usb_rx_refill(devinfo, req);
 556}
 557
 558static void
 559brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 560{
 561        struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
 562
 563        brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
 564                  devinfo->bus_pub.state, state);
 565
 566        if (devinfo->bus_pub.state == state)
 567                return;
 568
 569        devinfo->bus_pub.state = state;
 570
 571        /* update state of upper layer */
 572        if (state == BRCMFMAC_USB_STATE_DOWN) {
 573                brcmf_dbg(USB, "DBUS is down\n");
 574                brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
 575        } else if (state == BRCMFMAC_USB_STATE_UP) {
 576                brcmf_dbg(USB, "DBUS is up\n");
 577                brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
 578        } else {
 579                brcmf_dbg(USB, "DBUS current state=%d\n", state);
 580        }
 581}
 582
 583static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
 584{
 585        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 586        struct brcmf_usbreq  *req;
 587        int ret;
 588        unsigned long flags;
 589
 590        brcmf_dbg(USB, "Enter, skb=%p\n", skb);
 591        if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 592                ret = -EIO;
 593                goto fail;
 594        }
 595
 596        req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
 597                                        &devinfo->tx_freecount);
 598        if (!req) {
 599                brcmf_err("no req to send\n");
 600                ret = -ENOMEM;
 601                goto fail;
 602        }
 603
 604        req->skb = skb;
 605        req->devinfo = devinfo;
 606        usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
 607                          skb->data, skb->len, brcmf_usb_tx_complete, req);
 608        req->urb->transfer_flags |= URB_ZERO_PACKET;
 609        brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
 610        ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 611        if (ret) {
 612                brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
 613                brcmf_usb_del_fromq(devinfo, req);
 614                req->skb = NULL;
 615                brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
 616                              &devinfo->tx_freecount);
 617                goto fail;
 618        }
 619
 620        spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 621        if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
 622            !devinfo->tx_flowblock) {
 623                brcmf_proto_bcdc_txflowblock(dev, true);
 624                devinfo->tx_flowblock = true;
 625        }
 626        spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 627        return 0;
 628
 629fail:
 630        return ret;
 631}
 632
 633
 634static int brcmf_usb_up(struct device *dev)
 635{
 636        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 637
 638        brcmf_dbg(USB, "Enter\n");
 639        if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
 640                return 0;
 641
 642        /* Success, indicate devinfo is fully up */
 643        brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
 644
 645        if (devinfo->ctl_urb) {
 646                devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
 647                devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
 648
 649                /* CTL Write */
 650                devinfo->ctl_write.bRequestType =
 651                        USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 652                devinfo->ctl_write.bRequest = 0;
 653                devinfo->ctl_write.wValue = cpu_to_le16(0);
 654                devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
 655
 656                /* CTL Read */
 657                devinfo->ctl_read.bRequestType =
 658                        USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 659                devinfo->ctl_read.bRequest = 1;
 660                devinfo->ctl_read.wValue = cpu_to_le16(0);
 661                devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
 662        }
 663        brcmf_usb_rx_fill_all(devinfo);
 664        return 0;
 665}
 666
 667static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
 668{
 669        int i;
 670
 671        if (devinfo->ctl_urb)
 672                usb_kill_urb(devinfo->ctl_urb);
 673        if (devinfo->bulk_urb)
 674                usb_kill_urb(devinfo->bulk_urb);
 675        if (devinfo->tx_reqs)
 676                for (i = 0; i < devinfo->bus_pub.ntxq; i++)
 677                        usb_kill_urb(devinfo->tx_reqs[i].urb);
 678        if (devinfo->rx_reqs)
 679                for (i = 0; i < devinfo->bus_pub.nrxq; i++)
 680                        usb_kill_urb(devinfo->rx_reqs[i].urb);
 681}
 682
 683static void brcmf_usb_down(struct device *dev)
 684{
 685        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 686
 687        brcmf_dbg(USB, "Enter\n");
 688        if (devinfo == NULL)
 689                return;
 690
 691        if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
 692                return;
 693
 694        brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
 695
 696        brcmf_cancel_all_urbs(devinfo);
 697}
 698
 699static void
 700brcmf_usb_sync_complete(struct urb *urb)
 701{
 702        struct brcmf_usbdev_info *devinfo =
 703                        (struct brcmf_usbdev_info *)urb->context;
 704
 705        devinfo->ctl_completed = true;
 706        brcmf_usb_ioctl_resp_wake(devinfo);
 707}
 708
 709static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
 710                            void *buffer, int buflen)
 711{
 712        int ret;
 713        char *tmpbuf;
 714        u16 size;
 715
 716        if ((!devinfo) || (devinfo->ctl_urb == NULL))
 717                return -EINVAL;
 718
 719        tmpbuf = kmalloc(buflen, GFP_ATOMIC);
 720        if (!tmpbuf)
 721                return -ENOMEM;
 722
 723        size = buflen;
 724        devinfo->ctl_urb->transfer_buffer_length = size;
 725
 726        devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 727        devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
 728                USB_RECIP_INTERFACE;
 729        devinfo->ctl_read.bRequest = cmd;
 730
 731        usb_fill_control_urb(devinfo->ctl_urb,
 732                devinfo->usbdev,
 733                usb_rcvctrlpipe(devinfo->usbdev, 0),
 734                (unsigned char *) &devinfo->ctl_read,
 735                (void *) tmpbuf, size,
 736                (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 737
 738        devinfo->ctl_completed = false;
 739        ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 740        if (ret < 0) {
 741                brcmf_err("usb_submit_urb failed %d\n", ret);
 742                goto finalize;
 743        }
 744
 745        if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
 746                usb_kill_urb(devinfo->ctl_urb);
 747                ret = -ETIMEDOUT;
 748        } else {
 749                memcpy(buffer, tmpbuf, buflen);
 750        }
 751
 752finalize:
 753        kfree(tmpbuf);
 754        return ret;
 755}
 756
 757static bool
 758brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
 759{
 760        struct bootrom_id_le id;
 761        u32 chipid, chiprev;
 762
 763        brcmf_dbg(USB, "Enter\n");
 764
 765        if (devinfo == NULL)
 766                return false;
 767
 768        /* Check if firmware downloaded already by querying runtime ID */
 769        id.chip = cpu_to_le32(0xDEAD);
 770        brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 771
 772        chipid = le32_to_cpu(id.chip);
 773        chiprev = le32_to_cpu(id.chiprev);
 774
 775        if ((chipid & 0x4300) == 0x4300)
 776                brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
 777        else
 778                brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
 779        if (chipid == BRCMF_POSTBOOT_ID) {
 780                brcmf_dbg(USB, "firmware already downloaded\n");
 781                brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 782                return false;
 783        } else {
 784                devinfo->bus_pub.devid = chipid;
 785                devinfo->bus_pub.chiprev = chiprev;
 786        }
 787        return true;
 788}
 789
 790static int
 791brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
 792{
 793        struct bootrom_id_le id;
 794        u32 loop_cnt;
 795        int err;
 796
 797        brcmf_dbg(USB, "Enter\n");
 798
 799        loop_cnt = 0;
 800        do {
 801                mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
 802                loop_cnt++;
 803                id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
 804                err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 805                if ((err) && (err != -ETIMEDOUT))
 806                        return err;
 807                if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
 808                        break;
 809        } while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
 810
 811        if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
 812                brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
 813                          le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
 814
 815                brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 816                return 0;
 817        } else {
 818                brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
 819                          BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
 820                return -EINVAL;
 821        }
 822}
 823
 824
 825static int
 826brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
 827{
 828        int ret;
 829
 830        if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
 831                return -EINVAL;
 832
 833        /* Prepare the URB */
 834        usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
 835                          devinfo->tx_pipe, buffer, len,
 836                          (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 837
 838        devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
 839
 840        devinfo->ctl_completed = false;
 841        ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
 842        if (ret) {
 843                brcmf_err("usb_submit_urb failed %d\n", ret);
 844                return ret;
 845        }
 846        ret = brcmf_usb_ioctl_resp_wait(devinfo);
 847        return (ret == 0);
 848}
 849
 850static int
 851brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
 852{
 853        unsigned int sendlen, sent, dllen;
 854        char *bulkchunk = NULL, *dlpos;
 855        struct rdl_state_le state;
 856        u32 rdlstate, rdlbytes;
 857        int err = 0;
 858
 859        brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
 860
 861        bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
 862        if (bulkchunk == NULL) {
 863                err = -ENOMEM;
 864                goto fail;
 865        }
 866
 867        /* 1) Prepare USB boot loader for runtime image */
 868        brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
 869
 870        rdlstate = le32_to_cpu(state.state);
 871        rdlbytes = le32_to_cpu(state.bytes);
 872
 873        /* 2) Check we are in the Waiting state */
 874        if (rdlstate != DL_WAITING) {
 875                brcmf_err("Failed to DL_START\n");
 876                err = -EINVAL;
 877                goto fail;
 878        }
 879        sent = 0;
 880        dlpos = fw;
 881        dllen = fwlen;
 882
 883        /* Get chip id and rev */
 884        while (rdlbytes != dllen) {
 885                /* Wait until the usb device reports it received all
 886                 * the bytes we sent */
 887                if ((rdlbytes == sent) && (rdlbytes != dllen)) {
 888                        if ((dllen-sent) < TRX_RDL_CHUNK)
 889                                sendlen = dllen-sent;
 890                        else
 891                                sendlen = TRX_RDL_CHUNK;
 892
 893                        /* simply avoid having to send a ZLP by ensuring we
 894                         * never have an even
 895                         * multiple of 64
 896                         */
 897                        if (!(sendlen % 64))
 898                                sendlen -= 4;
 899
 900                        /* send data */
 901                        memcpy(bulkchunk, dlpos, sendlen);
 902                        if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
 903                                                   sendlen)) {
 904                                brcmf_err("send_bulk failed\n");
 905                                err = -EINVAL;
 906                                goto fail;
 907                        }
 908
 909                        dlpos += sendlen;
 910                        sent += sendlen;
 911                }
 912                err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
 913                                       sizeof(state));
 914                if (err) {
 915                        brcmf_err("DL_GETSTATE Failed\n");
 916                        goto fail;
 917                }
 918
 919                rdlstate = le32_to_cpu(state.state);
 920                rdlbytes = le32_to_cpu(state.bytes);
 921
 922                /* restart if an error is reported */
 923                if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
 924                        brcmf_err("Bad Hdr or Bad CRC state %d\n",
 925                                  rdlstate);
 926                        err = -EINVAL;
 927                        goto fail;
 928                }
 929        }
 930
 931fail:
 932        kfree(bulkchunk);
 933        brcmf_dbg(USB, "Exit, err=%d\n", err);
 934        return err;
 935}
 936
 937static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
 938{
 939        int err;
 940
 941        brcmf_dbg(USB, "Enter\n");
 942
 943        if (devinfo == NULL)
 944                return -EINVAL;
 945
 946        if (devinfo->bus_pub.devid == 0xDEAD)
 947                return -EINVAL;
 948
 949        err = brcmf_usb_dl_writeimage(devinfo, fw, len);
 950        if (err == 0)
 951                devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
 952        else
 953                devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
 954        brcmf_dbg(USB, "Exit, err=%d\n", err);
 955
 956        return err;
 957}
 958
 959static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
 960{
 961        struct rdl_state_le state;
 962
 963        brcmf_dbg(USB, "Enter\n");
 964        if (!devinfo)
 965                return -EINVAL;
 966
 967        if (devinfo->bus_pub.devid == 0xDEAD)
 968                return -EINVAL;
 969
 970        /* Check we are runnable */
 971        state.state = 0;
 972        brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
 973
 974        /* Start the image */
 975        if (state.state == cpu_to_le32(DL_RUNNABLE)) {
 976                if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
 977                        return -ENODEV;
 978                if (brcmf_usb_resetcfg(devinfo))
 979                        return -ENODEV;
 980                /* The Dongle may go for re-enumeration. */
 981        } else {
 982                brcmf_err("Dongle not runnable\n");
 983                return -EINVAL;
 984        }
 985        brcmf_dbg(USB, "Exit\n");
 986        return 0;
 987}
 988
 989static int
 990brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
 991{
 992        int err;
 993
 994        brcmf_dbg(USB, "Enter\n");
 995        if (devinfo == NULL)
 996                return -ENODEV;
 997
 998        if (!devinfo->image) {
 999                brcmf_err("No firmware!\n");
1000                return -ENOENT;
1001        }
1002
1003        err = brcmf_usb_dlstart(devinfo,
1004                (u8 *)devinfo->image, devinfo->image_len);
1005        if (err == 0)
1006                err = brcmf_usb_dlrun(devinfo);
1007        return err;
1008}
1009
1010
1011static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1012{
1013        brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1014
1015        /* free the URBS */
1016        brcmf_usb_free_q(&devinfo->rx_freeq);
1017        brcmf_usb_free_q(&devinfo->tx_freeq);
1018
1019        usb_free_urb(devinfo->ctl_urb);
1020        usb_free_urb(devinfo->bulk_urb);
1021
1022        kfree(devinfo->tx_reqs);
1023        kfree(devinfo->rx_reqs);
1024
1025        if (devinfo->settings)
1026                brcmf_release_module_param(devinfo->settings);
1027}
1028
1029
1030static int check_file(const u8 *headers)
1031{
1032        struct trx_header_le *trx;
1033        int actual_len = -1;
1034
1035        brcmf_dbg(USB, "Enter\n");
1036        /* Extract trx header */
1037        trx = (struct trx_header_le *) headers;
1038        if (trx->magic != cpu_to_le32(TRX_MAGIC))
1039                return -1;
1040
1041        headers += sizeof(struct trx_header_le);
1042
1043        if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1044                actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1045                return actual_len + sizeof(struct trx_header_le);
1046        }
1047        return -1;
1048}
1049
1050
1051static
1052struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1053                                      int nrxq, int ntxq)
1054{
1055        brcmf_dbg(USB, "Enter\n");
1056
1057        devinfo->bus_pub.nrxq = nrxq;
1058        devinfo->rx_low_watermark = nrxq / 2;
1059        devinfo->bus_pub.devinfo = devinfo;
1060        devinfo->bus_pub.ntxq = ntxq;
1061        devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1062
1063        /* flow control when too many tx urbs posted */
1064        devinfo->tx_low_watermark = ntxq / 4;
1065        devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1066        devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1067
1068        /* Initialize other structure content */
1069        init_waitqueue_head(&devinfo->ioctl_resp_wait);
1070
1071        /* Initialize the spinlocks */
1072        spin_lock_init(&devinfo->qlock);
1073        spin_lock_init(&devinfo->tx_flowblock_lock);
1074
1075        INIT_LIST_HEAD(&devinfo->rx_freeq);
1076        INIT_LIST_HEAD(&devinfo->rx_postq);
1077
1078        INIT_LIST_HEAD(&devinfo->tx_freeq);
1079        INIT_LIST_HEAD(&devinfo->tx_postq);
1080
1081        devinfo->tx_flowblock = false;
1082
1083        devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1084        if (!devinfo->rx_reqs)
1085                goto error;
1086
1087        devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1088        if (!devinfo->tx_reqs)
1089                goto error;
1090        devinfo->tx_freecount = ntxq;
1091
1092        devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1093        if (!devinfo->ctl_urb)
1094                goto error;
1095        devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1096        if (!devinfo->bulk_urb)
1097                goto error;
1098
1099        return &devinfo->bus_pub;
1100
1101error:
1102        brcmf_err("failed!\n");
1103        brcmf_usb_detach(devinfo);
1104        return NULL;
1105}
1106
1107static void brcmf_usb_wowl_config(struct device *dev, bool enabled)
1108{
1109        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
1110
1111        brcmf_dbg(USB, "Configuring WOWL, enabled=%d\n", enabled);
1112        devinfo->wowl_enabled = enabled;
1113        if (enabled)
1114                device_set_wakeup_enable(devinfo->dev, true);
1115        else
1116                device_set_wakeup_enable(devinfo->dev, false);
1117}
1118
1119static
1120int brcmf_usb_get_fwname(struct device *dev, const char *ext, u8 *fw_name)
1121{
1122        struct brcmf_bus *bus = dev_get_drvdata(dev);
1123        struct brcmf_fw_request *fwreq;
1124        struct brcmf_fw_name fwnames[] = {
1125                { ext, fw_name },
1126        };
1127
1128        fwreq = brcmf_fw_alloc_request(bus->chip, bus->chiprev,
1129                                       brcmf_usb_fwnames,
1130                                       ARRAY_SIZE(brcmf_usb_fwnames),
1131                                       fwnames, ARRAY_SIZE(fwnames));
1132        if (!fwreq)
1133                return -ENOMEM;
1134
1135        kfree(fwreq);
1136        return 0;
1137}
1138
1139static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1140        .preinit = brcmf_usb_up,
1141        .stop = brcmf_usb_down,
1142        .txdata = brcmf_usb_tx,
1143        .txctl = brcmf_usb_tx_ctlpkt,
1144        .rxctl = brcmf_usb_rx_ctlpkt,
1145        .wowl_config = brcmf_usb_wowl_config,
1146        .get_fwname = brcmf_usb_get_fwname,
1147};
1148
1149#define BRCMF_USB_FW_CODE       0
1150
1151static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1152                                   struct brcmf_fw_request *fwreq)
1153{
1154        struct brcmf_bus *bus = dev_get_drvdata(dev);
1155        struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1156        const struct firmware *fw;
1157
1158        if (ret)
1159                goto error;
1160
1161        brcmf_dbg(USB, "Start fw downloading\n");
1162
1163        fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1164        kfree(fwreq);
1165
1166        ret = check_file(fw->data);
1167        if (ret < 0) {
1168                brcmf_err("invalid firmware\n");
1169                release_firmware(fw);
1170                goto error;
1171        }
1172
1173        devinfo->image = fw->data;
1174        devinfo->image_len = fw->size;
1175
1176        ret = brcmf_usb_fw_download(devinfo);
1177        release_firmware(fw);
1178        if (ret)
1179                goto error;
1180
1181        ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1182        if (ret)
1183                goto error;
1184
1185        /* Attach to the common driver interface */
1186        ret = brcmf_attach(devinfo->dev);
1187        if (ret)
1188                goto error;
1189
1190        complete(&devinfo->dev_init_done);
1191        return;
1192error:
1193        brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1194        complete(&devinfo->dev_init_done);
1195        device_release_driver(dev);
1196}
1197
1198static struct brcmf_fw_request *
1199brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1200{
1201        struct brcmf_fw_request *fwreq;
1202        struct brcmf_fw_name fwnames[] = {
1203                { ".bin", devinfo->fw_name },
1204        };
1205
1206        fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1207                                       devinfo->bus_pub.chiprev,
1208                                       brcmf_usb_fwnames,
1209                                       ARRAY_SIZE(brcmf_usb_fwnames),
1210                                       fwnames, ARRAY_SIZE(fwnames));
1211        if (!fwreq)
1212                return NULL;
1213
1214        fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1215
1216        return fwreq;
1217}
1218
1219static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
1220{
1221        struct brcmf_bus *bus = NULL;
1222        struct brcmf_usbdev *bus_pub = NULL;
1223        struct device *dev = devinfo->dev;
1224        struct brcmf_fw_request *fwreq;
1225        int ret;
1226
1227        brcmf_dbg(USB, "Enter\n");
1228        bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1229        if (!bus_pub)
1230                return -ENODEV;
1231
1232        bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC);
1233        if (!bus) {
1234                ret = -ENOMEM;
1235                goto fail;
1236        }
1237
1238        bus->dev = dev;
1239        bus_pub->bus = bus;
1240        bus->bus_priv.usb = bus_pub;
1241        dev_set_drvdata(dev, bus);
1242        bus->ops = &brcmf_usb_bus_ops;
1243        bus->proto_type = BRCMF_PROTO_BCDC;
1244        bus->always_use_fws_queue = true;
1245#ifdef CONFIG_PM
1246        bus->wowl_supported = true;
1247#endif
1248
1249        devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1250                                                   bus_pub->devid,
1251                                                   bus_pub->chiprev);
1252        if (!devinfo->settings) {
1253                ret = -ENOMEM;
1254                goto fail;
1255        }
1256
1257        if (!brcmf_usb_dlneeded(devinfo)) {
1258                ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1259                if (ret)
1260                        goto fail;
1261                ret = brcmf_attach(devinfo->dev);
1262                if (ret)
1263                        goto fail;
1264                /* we are done */
1265                complete(&devinfo->dev_init_done);
1266                return 0;
1267        }
1268        bus->chip = bus_pub->devid;
1269        bus->chiprev = bus_pub->chiprev;
1270
1271        fwreq = brcmf_usb_prepare_fw_request(devinfo);
1272        if (!fwreq) {
1273                ret = -ENOMEM;
1274                goto fail;
1275        }
1276
1277        /* request firmware here */
1278        ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1279        if (ret) {
1280                brcmf_err("firmware request failed: %d\n", ret);
1281                kfree(fwreq);
1282                goto fail;
1283        }
1284
1285        return 0;
1286
1287fail:
1288        /* Release resources in reverse order */
1289        brcmf_free(devinfo->dev);
1290        kfree(bus);
1291        brcmf_usb_detach(devinfo);
1292        return ret;
1293}
1294
1295static void
1296brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1297{
1298        if (!devinfo)
1299                return;
1300        brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1301
1302        brcmf_detach(devinfo->dev);
1303        brcmf_free(devinfo->dev);
1304        kfree(devinfo->bus_pub.bus);
1305        brcmf_usb_detach(devinfo);
1306}
1307
1308static int
1309brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1310{
1311        struct usb_device *usb = interface_to_usbdev(intf);
1312        struct brcmf_usbdev_info *devinfo;
1313        struct usb_interface_descriptor *desc;
1314        struct usb_endpoint_descriptor *endpoint;
1315        int ret = 0;
1316        u32 num_of_eps;
1317        u8 endpoint_num, ep;
1318
1319        brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1320
1321        devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1322        if (devinfo == NULL)
1323                return -ENOMEM;
1324
1325        devinfo->usbdev = usb;
1326        devinfo->dev = &usb->dev;
1327        /* Init completion, to protect for disconnect while still loading.
1328         * Necessary because of the asynchronous firmware load construction
1329         */
1330        init_completion(&devinfo->dev_init_done);
1331
1332        usb_set_intfdata(intf, devinfo);
1333
1334        /* Check that the device supports only one configuration */
1335        if (usb->descriptor.bNumConfigurations != 1) {
1336                brcmf_err("Number of configurations: %d not supported\n",
1337                          usb->descriptor.bNumConfigurations);
1338                ret = -ENODEV;
1339                goto fail;
1340        }
1341
1342        if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1343            (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1344            (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1345                brcmf_err("Device class: 0x%x not supported\n",
1346                          usb->descriptor.bDeviceClass);
1347                ret = -ENODEV;
1348                goto fail;
1349        }
1350
1351        desc = &intf->altsetting[0].desc;
1352        if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1353            (desc->bInterfaceSubClass != 2) ||
1354            (desc->bInterfaceProtocol != 0xff)) {
1355                brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1356                          desc->bInterfaceNumber, desc->bInterfaceClass,
1357                          desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1358                ret = -ENODEV;
1359                goto fail;
1360        }
1361
1362        num_of_eps = desc->bNumEndpoints;
1363        for (ep = 0; ep < num_of_eps; ep++) {
1364                endpoint = &intf->altsetting[0].endpoint[ep].desc;
1365                endpoint_num = usb_endpoint_num(endpoint);
1366                if (!usb_endpoint_xfer_bulk(endpoint))
1367                        continue;
1368                if (usb_endpoint_dir_in(endpoint)) {
1369                        if (!devinfo->rx_pipe)
1370                                devinfo->rx_pipe =
1371                                        usb_rcvbulkpipe(usb, endpoint_num);
1372                } else {
1373                        if (!devinfo->tx_pipe)
1374                                devinfo->tx_pipe =
1375                                        usb_sndbulkpipe(usb, endpoint_num);
1376                }
1377        }
1378        if (devinfo->rx_pipe == 0) {
1379                brcmf_err("No RX (in) Bulk EP found\n");
1380                ret = -ENODEV;
1381                goto fail;
1382        }
1383        if (devinfo->tx_pipe == 0) {
1384                brcmf_err("No TX (out) Bulk EP found\n");
1385                ret = -ENODEV;
1386                goto fail;
1387        }
1388
1389        devinfo->ifnum = desc->bInterfaceNumber;
1390
1391        if (usb->speed == USB_SPEED_SUPER_PLUS)
1392                brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1393        else if (usb->speed == USB_SPEED_SUPER)
1394                brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1395        else if (usb->speed == USB_SPEED_HIGH)
1396                brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1397        else
1398                brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1399
1400        ret = brcmf_usb_probe_cb(devinfo);
1401        if (ret)
1402                goto fail;
1403
1404        /* Success */
1405        return 0;
1406
1407fail:
1408        complete(&devinfo->dev_init_done);
1409        kfree(devinfo);
1410        usb_set_intfdata(intf, NULL);
1411        return ret;
1412}
1413
1414static void
1415brcmf_usb_disconnect(struct usb_interface *intf)
1416{
1417        struct brcmf_usbdev_info *devinfo;
1418
1419        brcmf_dbg(USB, "Enter\n");
1420        devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1421
1422        if (devinfo) {
1423                wait_for_completion(&devinfo->dev_init_done);
1424                /* Make sure that devinfo still exists. Firmware probe routines
1425                 * may have released the device and cleared the intfdata.
1426                 */
1427                if (!usb_get_intfdata(intf))
1428                        goto done;
1429
1430                brcmf_usb_disconnect_cb(devinfo);
1431                kfree(devinfo);
1432        }
1433done:
1434        brcmf_dbg(USB, "Exit\n");
1435}
1436
1437/*
1438 * only need to signal the bus being down and update the state.
1439 */
1440static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1441{
1442        struct usb_device *usb = interface_to_usbdev(intf);
1443        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1444
1445        brcmf_dbg(USB, "Enter\n");
1446        devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1447        if (devinfo->wowl_enabled) {
1448                brcmf_cancel_all_urbs(devinfo);
1449        } else {
1450                brcmf_detach(&usb->dev);
1451                brcmf_free(&usb->dev);
1452        }
1453        return 0;
1454}
1455
1456/*
1457 * (re-) start the bus.
1458 */
1459static int brcmf_usb_resume(struct usb_interface *intf)
1460{
1461        struct usb_device *usb = interface_to_usbdev(intf);
1462        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1463
1464        brcmf_dbg(USB, "Enter\n");
1465        if (!devinfo->wowl_enabled) {
1466                int err;
1467
1468                err = brcmf_alloc(&usb->dev, devinfo->settings);
1469                if (err)
1470                        return err;
1471
1472                err = brcmf_attach(devinfo->dev);
1473                if (err) {
1474                        brcmf_free(devinfo->dev);
1475                        return err;
1476                }
1477        }
1478
1479        devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1480        brcmf_usb_rx_fill_all(devinfo);
1481        return 0;
1482}
1483
1484static int brcmf_usb_reset_resume(struct usb_interface *intf)
1485{
1486        struct usb_device *usb = interface_to_usbdev(intf);
1487        struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1488        struct brcmf_fw_request *fwreq;
1489        int ret;
1490
1491        brcmf_dbg(USB, "Enter\n");
1492
1493        fwreq = brcmf_usb_prepare_fw_request(devinfo);
1494        if (!fwreq)
1495                return -ENOMEM;
1496
1497        ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1498        if (ret < 0)
1499                kfree(fwreq);
1500
1501        return ret;
1502}
1503
1504#define BRCMF_USB_DEVICE(dev_id)        \
1505        { USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id) }
1506
1507#define LINKSYS_USB_DEVICE(dev_id)      \
1508        { USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id) }
1509
1510#define CYPRESS_USB_DEVICE(dev_id)      \
1511        { USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id) }
1512
1513static const struct usb_device_id brcmf_usb_devid_table[] = {
1514        BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1515        BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1516        BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1517        BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1518        LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1519        CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1520        { USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1521        /* special entry for device with firmware loaded and running */
1522        BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1523        CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1524        { /* end: all zeroes */ }
1525};
1526
1527MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1528
1529static struct usb_driver brcmf_usbdrvr = {
1530        .name = KBUILD_MODNAME,
1531        .probe = brcmf_usb_probe,
1532        .disconnect = brcmf_usb_disconnect,
1533        .id_table = brcmf_usb_devid_table,
1534        .suspend = brcmf_usb_suspend,
1535        .resume = brcmf_usb_resume,
1536        .reset_resume = brcmf_usb_reset_resume,
1537        .disable_hub_initiated_lpm = 1,
1538};
1539
1540static int brcmf_usb_reset_device(struct device *dev, void *notused)
1541{
1542        /* device past is the usb interface so we
1543         * need to use parent here.
1544         */
1545        brcmf_dev_reset(dev->parent);
1546        return 0;
1547}
1548
1549void brcmf_usb_exit(void)
1550{
1551        struct device_driver *drv = &brcmf_usbdrvr.drvwrap.driver;
1552        int ret;
1553
1554        brcmf_dbg(USB, "Enter\n");
1555        ret = driver_for_each_device(drv, NULL, NULL,
1556                                     brcmf_usb_reset_device);
1557        usb_deregister(&brcmf_usbdrvr);
1558}
1559
1560void brcmf_usb_register(void)
1561{
1562        int ret;
1563
1564        brcmf_dbg(USB, "Enter\n");
1565        ret = usb_register(&brcmf_usbdrvr);
1566        if (ret)
1567                brcmf_err("usb_register failed %d\n", ret);
1568}
1569