[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>
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
new file mode 100644
index 0000000..695fb6a
--- /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;
+}