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 INSANEDEBUG	0
#define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)

#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 if_usb_card *cardp);
static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
			       uint8_t *payload, uint16_t nb);
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
			uint16_t nb);
static void if_usb_free(struct if_usb_card *cardp);
static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
static int if_usb_reset_device(struct if_usb_card *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 if_usb_card *cardp = (struct if_usb_card *) urb->context;

	/* handle the transmission complete validations */

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

		lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
		lbs_deb_usb2(&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 if_usb_card
 *  @return 	   	N/A
 */
static void if_usb_free(struct if_usb_card *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->ep_out_buf);
	cardp->ep_out_buf = NULL;

	lbs_deb_leave(LBS_DEB_USB);
}

static void if_usb_setup_firmware(struct lbs_private *priv)
{
	struct if_usb_card *cardp = priv->card;
	struct cmd_ds_set_boot2_ver b2_cmd;
	struct cmd_ds_802_11_fw_wake_method wake_method;

	b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
	b2_cmd.action = 0;
	b2_cmd.version = cardp->boot2_version;

	if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
		lbs_deb_usb("Setting boot2 version failed\n");

	priv->wol_gpio = 2; /* Wake via GPIO2... */
	priv->wol_gap = 20; /* ... after 20ms    */
	lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA);

	wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
	wake_method.action = cpu_to_le16(CMD_ACT_GET);
	if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
		lbs_pr_info("Firmware does not seem to support PS mode\n");
	} else {
		if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
			lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
			priv->ps_supported = 1;
		} else {
			/* The versions which boot up this way don't seem to
			   work even if we set it to the command interrupt */
			lbs_pr_info("Firmware doesn't wake via command interrupt; disabling PS mode\n");
		}
	}
}

static void if_usb_fw_timeo(unsigned long priv)
{
	struct if_usb_card *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