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>

#ifdef CONFIG_OLPC
#include <asm/olpc.h>
#endif

#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,
					const char *fwname, int cmd);
static int if_usb_prog_firmware(struct if_usb_card *cardp,
					const char *fwname, int cmd);
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);

/* sysfs hooks */

/**
 *  Set function to write firmware to device's persistent memory
 */
static ssize_t if_usb_firmware_set(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
	struct if_usb_card *cardp = priv->card;
	int ret;

	ret = if_usb_prog_firmware(cardp, buf, BOOT_CMD_UPDATE_FW);
	if (ret == 0)
		return count;

	return ret;
}

/**
 * lbs_flash_fw attribute to be exported per ethX interface through sysfs
 * (/sys/class/net/ethX/lbs_flash_fw).  Use this like so to write firmware to
 * the device's persistent memory:
 * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_flash_fw
 */
static DEVICE_ATTR(lbs_flash_fw, 0200, NULL, if_usb_firmware_set);

/**
 *  Set function to write firmware to device's persistent memory
 */
static ssize_t if_usb_boot2_set(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct lbs_private *priv = to_net_dev(dev)->ml_priv;
	struct if_usb_card *cardp = priv->card;
	int ret;

	ret = if_usb_prog_firmware(cardp, buf, BOOT_CMD_UPDATE_BOOT2);
	if (ret == 0)
		return count;

	return ret;
}

/**
 * lbs_flash_boot2 attribute to be exported per ethX interface through sysfs
 * (/sys/class/net/ethX/lbs_flash_boot2).  Use this like so to write firmware
 * to the device's persistent memory:
 * echo usb8388-5.126.0.p5.bin > /sys/class/net/ethX/lbs_flash_boot2
 */
static DEVICE_ATTR(lbs_flash_boot2, 0200, NULL, if_usb_boot2_set);

/**
 *  @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