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/usb.h>

#define DRV_NAME "usb8xxx"

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

#define MESSAGE_HEADER_LEN	4

static char *lbs_fw_name = "usb8388.bin";
module_param_named(fw_name, lbs_fw_name, charp, 0644);

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_prog_firmware(struct usb_card_rec *cardp);
static int if_usb_host_to_card(struct lbs_private *priv,
	u8 type,
	u8 *payload,
	u16 nb);
static int if_usb_get_int_status(struct lbs_private *priv, u8 *);
static int if_usb_read_event_cause(struct lbs_private *);
static int usb_tx_block(struct usb_card_rec *cardp, u8 *payload, u16 nb);
static void if_usb_free(struct usb_card_rec *cardp);
static int if_usb_submit_rx_urb(struct usb_card_rec *cardp);
static int if_usb_reset_device(struct usb_card_rec *cardp);

/**
 *  @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)
{
	struct usb_card_rec *cardp = (struct usb_card_rec *) urb->context;

	/* handle the transmission complete validations */

	if (urb->status == 0) {
		struct lbs_private *priv = cardp->priv;

		/*
		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);
		*/

		/* Used for both firmware TX and regular TX.  priv isn't
		 * valid at firmware load time.
		 */
		if (priv)
			lbs_host_to_card_done(priv);
	} else {
		/* print the failure status number for debug */
		lbs_pr_info("URB in failure status: %d\n", urb->status);
	}

	return;
}

/**
 *  @brief  free tx/rx urb, skb and rx buffer
 *  @param cardp	pointer usb_card_rec
 *  @return 	   	N/A
 */
static 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);
}

static void if_usb_set_boot2_ver(struct lbs_private *priv)
{
	struct cmd_ds_set_boot2_ver b2_cmd;

	b2_cmd.action = 0;
	b2_cmd.version = priv->boot2_version;

	if (lbs_cmd(priv, CMD_SET_BOOT2_VER, b2_cmd, NULL, 0))
		lbs_deb_usb("Setting boot2 version failed\n");
}

static void if_usb_fw_timeo(unsigned long priv)
{
	struct usb_card_rec *cardp = (void *)priv;

	if (cardp->fwdnldover) {
		lbs_deb_usb("Download complete, no event. Assuming success\n");
	} else {
		lbs_pr_err("Download timed out\n");
		cardp->surprise_removed = 1;
	}
	wake_up(&cardp->fw_wq);
}
/**
 *  @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;
	struct lbs_private *priv;
	struct usb_card_rec *cardp;
	int i;

	udev = interface_to_usbdev(intf);

	cardp = kzalloc(sizeof(struct usb_card_rec<