path: root/drivers/net/wireless/libertas/if_usb.c

/**
  * 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(