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

/*
 * This file contains functions used in USB interface module.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/olpc-ec.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

MODULE_FIRMWARE("libertas/usb8388_v9.bin");
MODULE_FIRMWARE("libertas/usb8388_v5.bin");
MODULE_FIRMWARE("libertas/usb8388.bin");
MODULE_FIRMWARE("libertas/usb8682.bin");
MODULE_FIRMWARE("usb8388.bin");

enum {
	MODEL_UNKNOWN = 0x0,
	MODEL_8388 = 0x1,
	MODEL_8682 = 0x2
};

/* table of firmware file names */
static const struct lbs_fw_table fw_table[] = {
	{ MODEL_8388, "libertas/usb8388_olpc.bin", NULL },
	{ MODEL_8388, "libertas/usb8388_v9.bin", NULL },
	{ MODEL_8388, "libertas/usb8388_v5.bin", NULL },
	{ MODEL_8388, "libertas/usb8388.bin", NULL },
	{ MODEL_8388, "usb8388.bin", NULL },
	{ MODEL_8682, "libertas/usb8682.bin", NULL }
};

static struct usb_device_id if_usb_table[] = {
	/* Enter the device signature inside */
	{ USB_DEVICE(0x1286, 0x2001), .driver_info = MODEL_8388 },
	{ USB_DEVICE(0x05a3, 0x8388), .driver_info = MODEL_8388 },
	{}	/* 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 void if_usb_prog_firmware(struct lbs_private *priv, int ret,
				 const struct firmware *fw,
				 const struct firmware *unused);
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);

/**
 * if_usb_write_bulk_callback - callback function to handle the status
 * of the URB
 * @urb:	pointer to &urb structure
 * returns:	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);

		/* Boot commands such as UPDATE_FW and UPDATE_BOOT2 are not
		 * passed up to the lbs level.
		 */
		if (priv && priv->dnld_sent != DNLD_BOOTCMD_SENT)
			lbs_host_to_card_done(priv);
	} else {
		/* print the failure status number for debug */
		pr_info("URB in failure status: %d\n", urb->status);
	}
}

/**
 * if_usb_free - free tx/rx urb, skb and rx buffer
 * @cardp:	pointer to &if_usb_card
 * returns:	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,
			(struct wol_config *)