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

/**
  * This file contains functions used in USB interface module.
  */
#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/list.h>
#include <linux/usb.h>

#define DRV_NAME "usb8xxx"

#include "host.h"
#include "decl.h"
#include "defs.h"
#include "dev.h"
#include "if_usb.h"
#include "decl.h"

#define MESSAGE_HEADER_LEN	4

static const char usbdriver_name[] = "usb8xxx";
static u8 *default_fw_name = "usb8388.bin";

char *libertas_fw_name = NULL;
module_param_named(fw_name, libertas_fw_name, charp, 0644);

/*
 * We need to send a RESET command to all USB devices before
 * we tear down the USB connection. Otherwise we would not
 * be able to re-init device the device if the module gets
 * loaded again. This is a list of all initialized USB devices,
 * for the reset code see if_usb_reset_device()
*/
static LIST_HEAD(usb_devices);

static struct usb_device_id if_usb_table[] = {
	/* Enter the device signature inside */
	{ USB_DEVICE(0x1286, 0x2001) },
	{ USB_DEVICE(0x05a3, 0x8388) },
	{}	/* 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);
static int if_usb_register_dev(wlan_private * priv);
static int if_usb_unregister_dev(wlan_private *);
static int if_usb_prog_firmware(wlan_private *);
static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
static int if_usb_get_int_status(wlan_private * priv, u8 *);
static int if_usb_read_event_cause(wlan_private *);

/**
 *  @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->dev;

	/* handle the transmission complete validations */

	if (urb->status != 0) {
		/* print the failure status number for debug */
		lbs_pr_info("URB in failure status: %d\n", urb->status);
	} else {
		/*
		lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
		lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
		       urb->actual_length);
		*/
		priv->dnld_sent = DNLD_RES_RECEIVED;
		/* Wake main thread if commands are pending */
		if (!adapter->cur_cmd)
			wake_up_interruptible(&priv->waitq);
		if ((adapter->connect_status == LIBERTAS_CONNECTED)) {
			netif_wake_queue(dev);
			netif_wake_queue(priv->mesh_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)
{
	lbs_deb_enter(LBS_DEB_USB);

	/* 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;

	lbs_deb_leave(LBS_DEB_USB);
}

/**
 *  @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 *priv;
	struct usb_card_rec *cardp;
	int i;

	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
	if (!cardp) {
		lbs_pr_err("Out of memory allocating private data.\n");
		goto error;
	}

	cardp->udev = udev;
	iface_desc = intf->cur_altsetting;

	lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
	       " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
		     le16_to_cpu(udev->descriptor.b