[PATCH] Marvell Libertas 8388 802.11b/g USB driver

Add the Marvell Libertas 8388 802.11 USB driver.

Signed-off-by: Marcelo Tosatti <marcelo@kvack.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 952 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
new file mode 100644
index 00000000000..695fb6a66ff
--- /dev/null
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -0,0 +1,952 @@
+/**
+  * This file contains functions used in USB interface module.
+  */
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/netdevice.h>
+#include <linux/usb.h>
+
+#include "host.h"
+#include "sbi.h"
+#include "decl.h"
+#include "defs.h"
+#include "dev.h"
+#include "if_usb.h"
+
+#define MESSAGE_HEADER_LEN      4
+
+static const char usbdriver_name[] = "usb8xxx";
+
+static struct usb_device_id if_usb_table[] = {
+        /* Enter the device signature inside */
+        {
+                USB_DEVICE(USB8388_VID_1, USB8388_PID_1),
+        },
+        {
+                USB_DEVICE(USB8388_VID_2, USB8388_PID_2),
+        },
+        {}      /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, if_usb_table);
+
+static void if_usb_receive(struct urb *urb);
+static void if_usb_receive_fwload(struct urb *urb);
+
+/**
+ *  @brief  call back function to handle the status of the URB
+ *  @param urb          pointer to urb structure
+ *  @return             N/A
+ */
+static void if_usb_write_bulk_callback(struct urb *urb)
+{
+        wlan_private *priv = (wlan_private *) (urb->context);
+        wlan_adapter *adapter = priv->adapter;
+        struct net_device *dev = priv->wlan_dev.netdev;
+
+        /* handle the transmission complete validations */
+
+        if (urb->status != 0) {
+                /* print the failure status number for debug */
+                lbs_pr_info("URB in failure status\n");
+        } else {
+                lbs_dev_dbg(2, &urb->dev->dev, "URB status is successfull\n");
+                lbs_dev_dbg(2, &urb->dev->dev, "Actual length transmitted %d\n",
+                       urb->actual_length);
+                priv->wlan_dev.dnld_sent = DNLD_RES_RECEIVED;
+                /* Wake main thread if commands are pending */
+                if (!adapter->cur_cmd)
+                        wake_up_interruptible(&priv->mainthread.waitq);
+                if ((adapter->connect_status == libertas_connected))
+                        netif_wake_queue(dev);
+        }
+
+        return;
+}
+
+/**
+ *  @brief  free tx/rx urb, skb and rx buffer
+ *  @param cardp        pointer usb_card_rec
+ *  @return             N/A
+ */
+void if_usb_free(struct usb_card_rec *cardp)
+{
+        ENTER();
+
+        /* Unlink tx & rx urb */
+        usb_kill_urb(cardp->tx_urb);
+        usb_kill_urb(cardp->rx_urb);
+
+        usb_free_urb(cardp->tx_urb);
+        cardp->tx_urb = NULL;
+
+        usb_free_urb(cardp->rx_urb);
+        cardp->rx_urb = NULL;
+
+        kfree(cardp->bulk_out_buffer);
+        cardp->bulk_out_buffer = NULL;
+
+        LEAVE();
+        return;
+}
+
+/**
+ *  @brief sets the configuration values
+ *  @param ifnum        interface number
+ *  @param id           pointer to usb_device_id
+ *  @return             0 on success, error code on failure
+ */
+static int if_usb_probe(struct usb_interface *intf,
+                        const struct usb_device_id *id)
+{
+        struct usb_device *udev;
+        struct usb_host_interface *iface_desc;
+        struct usb_endpoint_descriptor *endpoint;
+        wlan_private *pwlanpriv;
+        struct usb_card_rec *usb_cardp;
+        int i;
+
+        udev = interface_to_usbdev(intf);
+
+        usb_cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
+        if (!usb_cardp) {
+                lbs_pr_err("Out of memory allocating private data.\n");
+                goto error;
+        }
+
+        usb_cardp->udev = udev;
+        iface_desc = intf->cur_altsetting;
+
+        lbs_dev_dbg(1, &udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
+               " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
+               udev->descriptor.bcdUSB,
+               udev->descriptor.bDeviceClass,
+               udev->descriptor.bDeviceSubClass,
+               udev->descriptor.bDeviceProtocol);
+
+        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+                endpoint = &iface_desc->endpoint[i].desc;
+                if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
+                    && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+                        USB_ENDPOINT_XFER_BULK)) {
+                        /* we found a bulk in endpoint */
+                        lbs_dev_dbg(1, &udev->dev, "Bulk in size is %d\n",
+                               endpoint->wMaxPacketSize);
+                        if (!
+                            (usb_cardp->rx_urb =
+                             usb_alloc_urb(0, GFP_KERNEL))) {
+                                lbs_dev_dbg(1, &udev->dev,
+                                       "Rx URB allocation failed\n");
+                                goto dealloc;
+                        }
+                        usb_cardp->rx_urb_recall = 0;
+
+                        usb_cardp->bulk_in_size =
+                            endpoint->wMaxPacketSize;
+                        usb_cardp->bulk_in_endpointAddr =
+                            (endpoint->
+                             bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
+                        lbs_dev_dbg(1, &udev->dev, "in_endpoint = %d\n",
+                               endpoint->bEndpointAddress);
+                }
+
+                if (((endpoint->
+                      bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
+                     USB_DIR_OUT)
+                    && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+                        USB_ENDPOINT_XFER_BULK)) {
+                        /* We found bulk out endpoint */
+                        if (!
+                            (usb_cardp->tx_urb =
+                             usb_alloc_urb(0, GFP_KERNEL))) {
+                                lbs_dev_dbg(1,&udev->dev,
+                                       "Tx URB allocation failed\n");
+                                goto dealloc;
+                        }
+
+                        usb_cardp->bulk_out_size =
+                            endpoint->wMaxPacketSize;
+                        lbs_dev_dbg(1, &udev->dev,
+                                    "Bulk out size is %d\n",
+                                    endpoint->wMaxPacketSize);
+                        usb_cardp->bulk_out_endpointAddr =
+                            endpoint->bEndpointAddress;
+                        lbs_dev_dbg(1, &udev->dev, "out_endpoint = %d\n",
+                                    endpoint->bEndpointAddress);
+                        usb_cardp->bulk_out_buffer =
+                            kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
+                                    GFP_KERNEL);
+
+                        if (!usb_cardp->bulk_out_buffer) {
+                                lbs_dev_dbg(1, &udev->dev,
+                                       "Could not allocate buffer\n");
+                                goto dealloc;
+                        }
+                }
+        }
+
+
+        /* At this point wlan_add_card() will be called.  Don't worry
+         * about keeping pwlanpriv around since it will be set on our
+         * usb device data in -> add() -> libertas_sbi_register_dev().
+         */
+        if (!(pwlanpriv = wlan_add_card(usb_cardp)))
+                goto dealloc;
+
+        usb_get_dev(udev);
+        usb_set_intfdata(intf, usb_cardp);
+
+        /*
+         * return card structure, which can be got back in the
+         * diconnect function as the ptr
+         * argument.
+         */
+        return 0;
+
+dealloc:
+        if_usb_free(usb_cardp);
+
+error:
+        return -ENOMEM;
+}
+
+/**
+ *  @brief free resource and cleanup
+ *  @param udev         pointer to usb_device
+ *  @param ptr          pointer to usb_cardp
+ *  @return             N/A
+ */
+static void if_usb_disconnect(struct usb_interface *intf)
+{
+        struct usb_card_rec *cardp = usb_get_intfdata(intf);
+        wlan_private *priv = (wlan_private *) cardp->priv;
+        wlan_adapter *adapter = NULL;
+
+        adapter = priv->adapter;
+
+        /*
+         * Update Surprise removed to TRUE
+         */
+        adapter->surpriseremoved = 1;
+
+        /* card is removed and we can call wlan_remove_card */
+        lbs_dev_dbg(1, &cardp->udev->dev, "call remove card\n");
+        wlan_remove_card(cardp);
+
+        /* Unlink and free urb */
+        if_usb_free(cardp);
+
+        usb_set_intfdata(intf, NULL);
+        usb_put_dev(interface_to_usbdev(intf));
+
+        return;
+}
+
+/**
+ *  @brief  This function download FW
+ *  @param priv         pointer to wlan_private
+ *  @return             0
+ */
+static int if_prog_firmware(wlan_private * priv)
+{
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+        struct FWData *fwdata;
+        struct fwheader *fwheader;
+        u8 *firmware = priv->firmware->data;
+
+        fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
+
+        if (!fwdata)
+                return -1;
+
+        fwheader = &fwdata->fwheader;
+
+        if (!cardp->CRC_OK) {
+                cardp->totalbytes = cardp->fwlastblksent;
+                cardp->fwseqnum = cardp->lastseqnum - 1;
+        }
+
+        lbs_dev_dbg(2, &cardp->udev->dev, "totalbytes = %d\n",
+                    cardp->totalbytes);
+
+        memcpy(fwheader, &firmware[cardp->totalbytes],
+               sizeof(struct fwheader));
+
+        cardp->fwlastblksent = cardp->totalbytes;
+        cardp->totalbytes += sizeof(struct fwheader);
+
+        lbs_dev_dbg(2, &cardp->udev->dev,"Copy Data\n");
+        memcpy(fwdata->data, &firmware[cardp->totalbytes],
+               fwdata->fwheader.datalength);
+
+        lbs_dev_dbg(2, &cardp->udev->dev,
+                    "Data length = %d\n", fwdata->fwheader.datalength);
+
+        cardp->fwseqnum = cardp->fwseqnum + 1;
+
+        fwdata->seqnum = cardp->fwseqnum;
+        cardp->lastseqnum = fwdata->seqnum;
+        cardp->totalbytes += fwdata->fwheader.datalength;
+
+        if (fwheader->dnldcmd == FW_HAS_DATA_TO_RECV) {
+                lbs_dev_dbg(2, &cardp->udev->dev, "There is data to follow\n");
+                lbs_dev_dbg(2, &cardp->udev->dev,
+                            "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
+                            cardp->totalbytes);
+                memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
+                usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
+
+        } else if (fwdata->fwheader.dnldcmd == FW_HAS_LAST_BLOCK) {
+                lbs_dev_dbg(2, &cardp->udev->dev,
+                            "Host has finished FW downloading\n");
+                lbs_dev_dbg(2, &cardp->udev->dev,
+                            "Donwloading FW JUMP BLOCK\n");
+                memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
+                usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
+                cardp->fwfinalblk = 1;
+        }
+
+        lbs_dev_dbg(2, &cardp->udev->dev,
+                    "The firmware download is done size is %d\n",
+                    cardp->totalbytes);
+
+        kfree(fwdata);
+
+        return 0;
+}
+
+static int libertas_do_reset(wlan_private *priv)
+{
+        int ret;
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+
+        ret = usb_reset_device(cardp->udev);
+        if (!ret) {
+                msleep(10);
+                reset_device(priv);
+                msleep(10);
+        }
+        return ret;
+}
+
+/**
+ *  @brief This function transfer the data to the device.
+ *  @param priv         pointer to wlan_private
+ *  @param payload      pointer to payload data
+ *  @param nb           data length
+ *  @return             0 or -1
+ */
+int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
+{
+        /* pointer to card structure */
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+        int ret = -1;
+
+        /* check if device is removed */
+        if (priv->adapter->surpriseremoved) {
+                lbs_dev_dbg(1, &cardp->udev->dev, "Device removed\n");
+                goto tx_ret;
+        }
+
+        usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
+                          usb_sndbulkpipe(cardp->udev,
+                                          cardp->bulk_out_endpointAddr),
+                          payload, nb, if_usb_write_bulk_callback, priv);
+
+        cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
+
+        if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
+                /*  transfer failed */
+                lbs_dev_dbg(1, &cardp->udev->dev, "usb_submit_urb failed\n");
+                ret = -1;
+        } else {
+                lbs_dev_dbg(2, &cardp->udev->dev, "usb_submit_urb success\n");
+                ret = 0;
+        }
+
+tx_ret:
+        return ret;
+}
+
+static int __if_usb_submit_rx_urb(wlan_private * priv,
+                                  void (*callbackfn)
+                                  (struct urb *urb))
+{
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+        struct sk_buff *skb;
+        struct read_cb_info *rinfo = &cardp->rinfo;
+        int ret = -1;
+
+        if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
+                lbs_pr_err("No free skb\n");
+                goto rx_ret;
+        }
+
+        rinfo->skb = skb;
+
+        /* Fill the receive configuration URB and initialise the Rx call back */
+        usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
+                          usb_rcvbulkpipe(cardp->udev,
+                                          cardp->bulk_in_endpointAddr),
+                          skb->tail + IPFIELD_ALIGN_OFFSET,
+                          MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
+                          rinfo);
+
+        cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
+
+        lbs_dev_dbg(2, &cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
+        if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
+                /* handle failure conditions */
+                lbs_dev_dbg(1, &cardp->udev->dev, "Submit Rx URB failed\n");
+                ret = -1;
+        } else {
+                lbs_dev_dbg(2, &cardp->udev->dev, "Submit Rx URB success\n");
+                ret = 0;
+        }
+
+rx_ret:
+        return ret;
+}
+
+static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
+{
+        return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
+}
+
+static inline int if_usb_submit_rx_urb(wlan_private * priv)
+{
+        return __if_usb_submit_rx_urb(priv, &if_usb_receive);
+}
+
+static void if_usb_receive_fwload(struct urb *urb)
+{
+        struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
+        wlan_private *priv = rinfo->priv;
+        struct sk_buff *skb = rinfo->skb;
+        struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
+        struct fwsyncheader *syncfwheader;
+        struct bootcmdrespStr bootcmdresp;
+
+        if (urb->status) {
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "URB status is failed during fw load\n");
+                kfree_skb(skb);
+                return;
+        }
+
+        if (cardp->bootcmdresp == 0) {
+                memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
+                        sizeof(bootcmdresp));
+                if (cardp->udev->descriptor.bcdDevice < 0x3106) {
+                        kfree_skb(skb);
+                        if_usb_submit_rx_urb_fwload(priv);
+                        cardp->bootcmdresp = 1;
+                        lbs_dev_dbg(1, &cardp->udev->dev,
+                                    "Received valid boot command response\n");
+                        return;
+                }
+                if (bootcmdresp.u32magicnumber != BOOT_CMD_MAGIC_NUMBER) {
+                        lbs_pr_info(
+                                "boot cmd response wrong magic number (0x%x)\n",
+                                bootcmdresp.u32magicnumber);
+                } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
+                        lbs_pr_info(
+                                "boot cmd response cmd_tag error (%d)\n",
+                                bootcmdresp.u8cmd_tag);
+                } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
+                        lbs_pr_info(
+                                "boot cmd response result error (%d)\n",
+                                bootcmdresp.u8result);
+                } else {
+                        cardp->bootcmdresp = 1;
+                        lbs_dev_dbg(1, &cardp->udev->dev,
+                                    "Received valid boot command response\n");
+                }
+                kfree_skb(skb);
+                if_usb_submit_rx_urb_fwload(priv);
+                return;
+        }
+
+        syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
+        if (!syncfwheader) {
+                lbs_dev_dbg(1, &cardp->udev->dev, "Failure to allocate syncfwheader\n");
+                kfree_skb(skb);
+                return;
+        }
+
+        memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
+                        sizeof(struct fwsyncheader));
+
+        if (!syncfwheader->cmd) {
+                lbs_dev_dbg(2, &cardp->udev->dev,
+                            "FW received Blk with correct CRC\n");
+                lbs_dev_dbg(2, &cardp->udev->dev,
+                            "FW received Blk seqnum = %d\n",
+                       syncfwheader->seqnum);
+                cardp->CRC_OK = 1;
+        } else {
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "FW received Blk with CRC error\n");
+                cardp->CRC_OK = 0;
+        }
+
+        kfree_skb(skb);
+
+        if (cardp->fwfinalblk) {
+                cardp->fwdnldover = 1;
+                goto exit;
+        }
+
+        if_prog_firmware(priv);
+
+        if_usb_submit_rx_urb_fwload(priv);
+exit:
+        kfree(syncfwheader);
+
+        return;
+
+}
+
+#define MRVDRV_MIN_PKT_LEN      30
+
+static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
+                                       struct usb_card_rec *cardp,
+                                       wlan_private *priv)
+{
+        if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
+            MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "Packet length is Invalid\n");
+                kfree_skb(skb);
+                return;
+        }
+
+        skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
+        skb_put(skb, recvlength);
+        skb_pull(skb, MESSAGE_HEADER_LEN);
+        libertas_process_rxed_packet(priv, skb);
+        priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
+}
+
+static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
+                                      struct sk_buff *skb,
+                                      struct usb_card_rec *cardp,
+                                      wlan_private *priv)
+{
+        u8 *cmdbuf;
+        if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "The receive buffer is too large\n");
+                kfree_skb(skb);
+                return;
+        }
+
+        if (!in_interrupt())
+                BUG();
+
+        spin_lock(&priv->adapter->driver_lock);
+        /* take care of cur_cmd = NULL case by reading the
+         * data to clear the interrupt */
+        if (!priv->adapter->cur_cmd) {
+                cmdbuf = priv->wlan_dev.upld_buf;
+                priv->adapter->hisregcpy &= ~his_cmdupldrdy;
+        } else
+                cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
+
+        cardp->usb_int_cause |= his_cmdupldrdy;
+        priv->wlan_dev.upld_len = (recvlength - MESSAGE_HEADER_LEN);
+        memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
+               priv->wlan_dev.upld_len);
+
+        kfree_skb(skb);
+        libertas_interrupt(priv->wlan_dev.netdev);
+        spin_unlock(&priv->adapter->driver_lock);
+
+        lbs_dev_dbg(1, &cardp->udev->dev,
+                    "Wake up main thread to handle cmd response\n");
+
+        return;
+}
+
+/**
+ *  @brief This function reads of the packet into the upload buff,
+ *  wake up the main thread and initialise the Rx callack.
+ *
+ *  @param urb          pointer to struct urb
+ *  @return             N/A
+ */
+static void if_usb_receive(struct urb *urb)
+{
+        struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
+        wlan_private *priv = rinfo->priv;
+        struct sk_buff *skb = rinfo->skb;
+        struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
+
+        int recvlength = urb->actual_length;
+        u8 *recvbuff = NULL;
+        u32 recvtype;
+
+        ENTER();
+
+        if (recvlength) {
+                if (urb->status) {
+                        lbs_dev_dbg(1, &cardp->udev->dev,
+                                    "URB status is failed\n");
+                        kfree_skb(skb);
+                        goto setup_for_next;
+                }
+
+                recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
+                memcpy(&recvtype, recvbuff, sizeof(u32));
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "Recv length = 0x%x\n", recvlength);
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "Receive type = 0x%X\n", recvtype);
+                recvtype = le32_to_cpu(recvtype);
+                lbs_dev_dbg(1, &cardp->udev->dev,
+                            "Receive type after = 0x%X\n", recvtype);
+        } else if (urb->status)
+                goto rx_exit;
+
+
+        switch (recvtype) {
+        case CMD_TYPE_DATA:
+                process_cmdtypedata(recvlength, skb, cardp, priv);
+                break;
+
+        case CMD_TYPE_REQUEST:
+                process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
+                break;
+
+        case CMD_TYPE_INDICATION:
+                /* Event cause handling */
+                spin_lock(&priv->adapter->driver_lock);
+                cardp->usb_event_cause = *(u32 *) (recvbuff + MESSAGE_HEADER_LEN);
+                lbs_dev_dbg(1, &cardp->udev->dev,"**EVENT** 0x%X\n",
+                            cardp->usb_event_cause);
+                if (cardp->usb_event_cause & 0xffff0000) {
+                        libertas_send_tx_feedback(priv);
+                        break;
+                }
+                cardp->usb_event_cause = le32_to_cpu(cardp->usb_event_cause) << 3;
+                cardp->usb_int_cause |= his_cardevent;
+                kfree_skb(skb);
+                libertas_interrupt(priv->wlan_dev.netdev);
+                spin_unlock(&priv->adapter->driver_lock);
+                goto rx_exit;
+        default:
+                kfree_skb(skb);
+                break;
+        }
+
+setup_for_next:
+        if_usb_submit_rx_urb(priv);
+rx_exit:
+        LEAVE();
+        return;
+}
+
+/**
+ *  @brief This function downloads data to FW
+ *  @param priv         pointer to wlan_private structure
+ *  @param type         type of data
+ *  @param buf          pointer to data buffer
+ *  @param len          number of bytes
+ *  @return             0 or -1
+ */
+int libertas_sbi_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
+{
+        int ret = -1;
+        u32 tmp;
+        struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
+
+        lbs_dev_dbg(1, &cardp->udev->dev,"*** type = %u\n", type);
+        lbs_dev_dbg(1, &cardp->udev->dev,"size after = %d\n", nb);
+
+        if (type == MVMS_CMD) {
+                tmp = cpu_to_le32(CMD_TYPE_REQUEST);
+                priv->wlan_dev.dnld_sent = DNLD_CMD_SENT;
+                memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
+                       MESSAGE_HEADER_LEN);
+
+        } else {
+                tmp = cpu_to_le32(CMD_TYPE_DATA);
+                priv->wlan_dev.dnld_sent = DNLD_DATA_SENT;
+                memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
+                       MESSAGE_HEADER_LEN);
+        }
+
+        memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
+
+        ret =
+            usb_tx_block(priv, cardp->bulk_out_buffer, nb + MESSAGE_HEADER_LEN);
+
+        return ret;
+}
+
+/* called with adapter->driver_lock held */
+int libertas_sbi_get_int_status(wlan_private * priv, u8 * ireg)
+{
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+
+        *ireg = cardp->usb_int_cause;
+        cardp->usb_int_cause = 0;
+
+        lbs_dev_dbg(1, &cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
+
+        return 0;
+}
+
+int libertas_sbi_read_event_cause(wlan_private * priv)
+{
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+        priv->adapter->eventcause = cardp->usb_event_cause;
+        /* Re-submit rx urb here to avoid event lost issue */
+        if_usb_submit_rx_urb(priv);
+        return 0;
+}
+
+int reset_device(wlan_private *priv)
+{
+        int ret;
+
+        ret = libertas_prepare_and_send_command(priv, cmd_802_11_reset,
+                                    cmd_act_halt, 0, 0, NULL);
+        msleep_interruptible(10);
+
+        return ret;
+}
+
+int libertas_sbi_unregister_dev(wlan_private * priv)
+{
+        int ret = 0;
+
+        /* Need to send a Reset command to device before USB resources freed
+         * and wlan_remove_card() called, then device can handle FW download
+         * again.
+         */
+        if (priv)
+                reset_device(priv);
+
+        return ret;
+}
+
+
+/**
+ *  @brief  This function register usb device and initialize parameter
+ *  @param              priv pointer to wlan_private
+ *  @return             0 or -1
+ */
+int libertas_sbi_register_dev(wlan_private * priv)
+{
+
+        struct usb_card_rec *cardp = (struct usb_card_rec *)priv->wlan_dev.card;
+        ENTER();
+
+        cardp->priv = priv;
+        cardp->eth_dev = priv->wlan_dev.netdev;
+        priv->hotplug_device = &(cardp->udev->dev);
+
+        SET_NETDEV_DEV(cardp->eth_dev, &(cardp->udev->dev));
+
+        lbs_dev_dbg(1, &cardp->udev->dev, "udev pointer is at %p\n",
+                    cardp->udev);
+
+        LEAVE();
+        return 0;
+}
+
+
+
+int libertas_sbi_prog_firmware(wlan_private * priv)
+{
+        struct usb_card_rec *cardp = priv->wlan_dev.card;
+        int i = 0;
+        static int reset_count = 10;
+
+        ENTER();
+
+        cardp->rinfo.priv = priv;
+
+restart:
+        if (if_usb_submit_rx_urb_fwload(priv) < 0) {
+                lbs_dev_dbg(1, &cardp->udev->dev, "URB submission is failed\n");
+                LEAVE();
+                return -1;
+        }
+
+#ifdef SUPPORT_BOOT_COMMAND
+        cardp->bootcmdresp = 0;
+        do {
+                int j = 0;
+                i++;
+                /* Issue Boot command = 1, Boot from Download-FW */
+                if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
+                /* wait for command response */
+                do {
+                        j++;
+                        msleep_interruptible(100);
+                } while (cardp->bootcmdresp == 0 && j < 10);
+        } while (cardp->bootcmdresp == 0 && i < 5);
+
+        if (cardp->bootcmdresp == 0) {
+                if (--reset_count >= 0) {
+                        libertas_do_reset(priv);
+                        goto restart;
+                }
+                return -1;
+        }
+#endif
+
+        i = 0;
+        priv->adapter->fw_ready = 0;
+
+        cardp->totalbytes = 0;
+        cardp->fwlastblksent = 0;
+        cardp->CRC_OK = 1;
+        cardp->fwdnldover = 0;
+        cardp->fwseqnum = -1;
+        cardp->totalbytes = 0;
+        cardp->fwfinalblk = 0;
+
+        if_prog_firmware(priv);
+
+        do {
+                lbs_dev_dbg(1, &cardp->udev->dev,"Wlan sched timeout\n");
+                i++;
+                msleep_interruptible(100);
+                if (priv->adapter->surpriseremoved || i >= 20)
+                        break;
+        } while (!cardp->fwdnldover);
+
+        if (!cardp->fwdnldover) {
+                lbs_pr_info("failed to load fw, resetting device!\n");
+                if (--reset_count >= 0) {
+                        libertas_do_reset(priv);
+                        goto restart;
+                }
+
+                lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
+                LEAVE();
+                return -1;
+        }
+
+        if_usb_submit_rx_urb(priv);
+
+        /* Delay 200 ms to waiting for the FW ready */
+        msleep_interruptible(200);
+
+        priv->adapter->fw_ready = 1;
+
+        LEAVE();
+        return 0;
+}
+
+/**
+ *  @brief Given a usb_card_rec return its wlan_private
+ *  @param card         pointer to a usb_card_rec
+ *  @return             pointer to wlan_private
+ */
+wlan_private *libertas_sbi_get_priv(void *card)
+{
+        struct usb_card_rec *cardp = card;
+        return cardp->priv;
+}
+
+#ifdef ENABLE_PM
+int libertas_sbi_suspend(wlan_private * priv)
+{
+        return 0;
+}
+
+int libertas_sbi_resume(wlan_private * priv)
+{
+        return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+        struct usb_card_rec *cardp = usb_get_intfdata(intf);
+        wlan_private *priv = cardp->priv;
+
+        ENTER();
+
+        if (priv->adapter->psstate != PS_STATE_FULL_POWER)
+                return -1;
+
+        netif_device_detach(cardp->eth_dev);
+
+        /* Unlink tx & rx urb */
+        usb_kill_urb(cardp->tx_urb);
+        usb_kill_urb(cardp->rx_urb);
+
+        cardp->rx_urb_recall = 1;
+
+        LEAVE();
+        return 0;
+}
+
+static int if_usb_resume(struct usb_interface *intf)
+{
+        struct usb_card_rec *cardp = usb_get_intfdata(intf);
+
+        ENTER();
+
+        cardp->rx_urb_recall = 0;
+
+        if_usb_submit_rx_urb(cardp->priv);
+
+        netif_device_attach(cardp->eth_dev);
+
+        LEAVE();
+        return 0;
+}
+#else
+#define if_usb_suspend NULL
+#define if_usb_resume NULL
+#endif
+
+static struct usb_driver if_usb_driver = {
+        /* driver name */
+        .name = usbdriver_name,
+        /* probe function name */
+        .probe = if_usb_probe,
+        /* disconnect function  name */
+        .disconnect = if_usb_disconnect,
+        /* device signature table */
+        .id_table = if_usb_table,
+        .suspend = if_usb_suspend,
+        .resume = if_usb_resume,
+};
+
+/**
+ *  @brief This function registers driver.
+ *  @param add          pointer to add_card callback function
+ *  @param remove       pointer to remove card callback function
+ *  @param arg          pointer to call back function parameter
+ *  @return             dummy success variable
+ */
+int libertas_sbi_register(void)
+{
+        /*
+         * API registers the Marvell USB driver
+         * to the USB system
+         */
+        usb_register(&if_usb_driver);
+
+        /* Return success to wlan layer */
+        return 0;
+}
+
+/**
+ *  @brief This function removes usb driver.
+ *  @return             N/A
+ */
+void libertas_sbi_unregister(void)
+{
+        /* API unregisters the driver from USB subsystem */
+        usb_deregister(&if_usb_driver);
+        return;
+}