at76c50x-usb: add driver

This is a driver for usb devices based on at76c50x chipset. This is
a mac80211 port of the original at76_usb driver.

Signed-off-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2465 insertions, 0 deletions

diff --git a/drivers/net/wireless/at76c50x-usb.c b/drivers/net/wireless/at76c50x-usb.c
new file mode 100644
index 0000000..e8868ae
--- /dev/null
+++ b/drivers/net/wireless/at76c50x-usb.c
@@ -0,0 +1,2465 @@
+/*
+ * at76c503/at76c505 USB driver
+ *
+ * Copyright (c) 2002 - 2003 Oliver Kurth
+ * Copyright (c) 2004 Joerg Albert <joerg.albert@gmx.de>
+ * Copyright (c) 2004 Nick Jones
+ * Copyright (c) 2004 Balint Seeber <n0_5p4m_p13453@hotmail.com>
+ * Copyright (c) 2007 Guido Guenther <agx@sigxcpu.org>
+ * Copyright (c) 2007 Kalle Valo <kalle.valo@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This file is part of the Berlios driver for WLAN USB devices based on the
+ * Atmel AT76C503A/505/505A.
+ *
+ * Some iw_handler code was taken from airo.c, (C) 1999 Benjamin Reed
+ *
+ * TODO for the mac80211 port:
+ * o adhoc support
+ * o RTS/CTS support
+ * o Power Save Mode support
+ * o support for short/long preambles
+ * o export variables through debugfs/sysfs
+ * o remove hex2str
+ * o remove mac2str
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/usb.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/wireless.h>
+#include <net/iw_handler.h>
+#include <net/ieee80211_radiotap.h>
+#include <linux/firmware.h>
+#include <linux/leds.h>
+#include <net/mac80211.h>
+
+#include "at76c50x-usb.h"
+
+/* Version information */
+#define DRIVER_NAME "at76c50x-usb"
+#define DRIVER_VERSION	"0.17"
+#define DRIVER_DESC "Atmel at76x USB Wireless LAN Driver"
+
+/* at76_debug bits */
+#define DBG_PROGRESS		0x00000001	/* authentication/accociation */
+#define DBG_BSS_TABLE		0x00000002	/* show BSS table after scans */
+#define DBG_IOCTL		0x00000004	/* ioctl calls / settings */
+#define DBG_MAC_STATE		0x00000008	/* MAC state transitions */
+#define DBG_TX_DATA		0x00000010	/* tx header */
+#define DBG_TX_DATA_CONTENT	0x00000020	/* tx content */
+#define DBG_TX_MGMT		0x00000040	/* tx management */
+#define DBG_RX_DATA		0x00000080	/* rx data header */
+#define DBG_RX_DATA_CONTENT	0x00000100	/* rx data content */
+#define DBG_RX_MGMT		0x00000200	/* rx mgmt frame headers */
+#define DBG_RX_BEACON		0x00000400	/* rx beacon */
+#define DBG_RX_CTRL		0x00000800	/* rx control */
+#define DBG_RX_MGMT_CONTENT	0x00001000	/* rx mgmt content */
+#define DBG_RX_FRAGS		0x00002000	/* rx data fragment handling */
+#define DBG_DEVSTART		0x00004000	/* fw download, device start */
+#define DBG_URB			0x00008000	/* rx urb status, ... */
+#define DBG_RX_ATMEL_HDR	0x00010000	/* Atmel-specific Rx headers */
+#define DBG_PROC_ENTRY		0x00020000	/* procedure entries/exits */
+#define DBG_PM			0x00040000	/* power management settings */
+#define DBG_BSS_MATCH		0x00080000	/* BSS match failures */
+#define DBG_PARAMS		0x00100000	/* show configured parameters */
+#define DBG_WAIT_COMPLETE	0x00200000	/* command completion */
+#define DBG_RX_FRAGS_SKB	0x00400000	/* skb header of Rx fragments */
+#define DBG_BSS_TABLE_RM	0x00800000	/* purging bss table entries */
+#define DBG_MONITOR_MODE	0x01000000	/* monitor mode */
+#define DBG_MIB			0x02000000	/* dump all MIBs on startup */
+#define DBG_MGMT_TIMER		0x04000000	/* dump mgmt_timer ops */
+#define DBG_WE_EVENTS		0x08000000	/* dump wireless events */
+#define DBG_FW			0x10000000	/* firmware download */
+#define DBG_DFU			0x20000000	/* device firmware upgrade */
+#define DBG_CMD			0x40000000
+#define DBG_MAC80211		0x80000000
+
+#define DBG_DEFAULTS		0
+
+/* Use our own dbg macro */
+#define at76_dbg(bits, format, arg...) \
+	do { \
+		if (at76_debug & (bits))				 \
+			printk(KERN_DEBUG DRIVER_NAME ": " format "\n" , \
+			       ## arg);					 \
+	} while (0)
+
+#define at76_dbg_dump(bits, buf, len, format, arg...)	\
+	do { \
+		if (at76_debug & (bits)) { \
+			printk(KERN_DEBUG DRIVER_NAME ": " format "\n" , \
+			       ## arg);					 \
+			print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,     \
+					     buf, len);			 \
+		}							 \
+	} while (0)
+
+static int at76_debug = DBG_DEFAULTS;
+
+/* Protect against concurrent firmware loading and parsing */
+static struct mutex fw_mutex;
+
+static struct fwentry firmwares[] = {
+	[0] = { "" },
+	[BOARD_503_ISL3861] = { "atmel_at76c503-i3861.bin" },
+	[BOARD_503_ISL3863] = { "atmel_at76c503-i3863.bin" },
+	[BOARD_503] = { "atmel_at76c503-rfmd.bin" },
+	[BOARD_503_ACC] = { "atmel_at76c503-rfmd-acc.bin" },
+	[BOARD_505] = { "atmel_at76c505-rfmd.bin" },
+	[BOARD_505_2958] = { "atmel_at76c505-rfmd2958.bin" },
+	[BOARD_505A] = { "atmel_at76c505a-rfmd2958.bin" },
+	[BOARD_505AMX] = { "atmel_at76c505amx-rfmd.bin" },
+};
+
+#define USB_DEVICE_DATA(__ops)	.driver_info = (kernel_ulong_t)(__ops)
+
+static struct usb_device_id dev_table[] = {
+	/*
+	 * at76c503-i3861
+	 */
+	/* Generic AT76C503/3861 device */
+	{ USB_DEVICE(0x03eb, 0x7603), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Linksys WUSB11 v2.1/v2.6 */
+	{ USB_DEVICE(0x066b, 0x2211), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Netgear MA101 rev. A */
+	{ USB_DEVICE(0x0864, 0x4100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Tekram U300C / Allnet ALL0193 */
+	{ USB_DEVICE(0x0b3b, 0x1612), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* HP HN210W J7801A */
+	{ USB_DEVICE(0x03f0, 0x011c), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Sitecom/Z-Com/Zyxel M4Y-750 */
+	{ USB_DEVICE(0x0cde, 0x0001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Dynalink/Askey WLL013 (intersil) */
+	{ USB_DEVICE(0x069a, 0x0320), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* EZ connect 11Mpbs Wireless USB Adapter SMC2662W v1 */
+	{ USB_DEVICE(0x0d5c, 0xa001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* BenQ AWL300 */
+	{ USB_DEVICE(0x04a5, 0x9000), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Addtron AWU-120, Compex WLU11 */
+	{ USB_DEVICE(0x05dd, 0xff31), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Intel AP310 AnyPoint II USB */
+	{ USB_DEVICE(0x8086, 0x0200), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Dynalink L11U */
+	{ USB_DEVICE(0x0d8e, 0x7100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* Arescom WL-210, FCC id 07J-GL2411USB */
+	{ USB_DEVICE(0x0d8e, 0x7110), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* I-O DATA WN-B11/USB */
+	{ USB_DEVICE(0x04bb, 0x0919), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/* BT Voyager 1010 */
+	{ USB_DEVICE(0x069a, 0x0821), USB_DEVICE_DATA(BOARD_503_ISL3861) },
+	/*
+	 * at76c503-i3863
+	 */
+	/* Generic AT76C503/3863 device */
+	{ USB_DEVICE(0x03eb, 0x7604), USB_DEVICE_DATA(BOARD_503_ISL3863) },
+	/* Samsung SWL-2100U */
+	{ USB_DEVICE(0x055d, 0xa000), USB_DEVICE_DATA(BOARD_503_ISL3863) },
+	/*
+	 * at76c503-rfmd
+	 */
+	/* Generic AT76C503/RFMD device */
+	{ USB_DEVICE(0x03eb, 0x7605), USB_DEVICE_DATA(BOARD_503) },
+	/* Dynalink/Askey WLL013 (rfmd) */
+	{ USB_DEVICE(0x069a, 0x0321), USB_DEVICE_DATA(BOARD_503) },
+	/* Linksys WUSB11 v2.6 */
+	{ USB_DEVICE(0x077b, 0x2219), USB_DEVICE_DATA(BOARD_503) },
+	/* Network Everywhere NWU11B */
+	{ USB_DEVICE(0x077b, 0x2227), USB_DEVICE_DATA(BOARD_503) },
+	/* Netgear MA101 rev. B */
+	{ USB_DEVICE(0x0864, 0x4102), USB_DEVICE_DATA(BOARD_503) },
+	/* D-Link DWL-120 rev. E */
+	{ USB_DEVICE(0x2001, 0x3200), USB_DEVICE_DATA(BOARD_503) },
+	/* Actiontec 802UAT1, HWU01150-01UK */
+	{ USB_DEVICE(0x1668, 0x7605), USB_DEVICE_DATA(BOARD_503) },
+	/* AirVast W-Buddie WN210 */
+	{ USB_DEVICE(0x03eb, 0x4102), USB_DEVICE_DATA(BOARD_503) },
+	/* Dick Smith Electronics XH1153 802.11b USB adapter */
+	{ USB_DEVICE(0x1371, 0x5743), USB_DEVICE_DATA(BOARD_503) },
+	/* CNet CNUSB611 */
+	{ USB_DEVICE(0x1371, 0x0001), USB_DEVICE_DATA(BOARD_503) },
+	/* FiberLine FL-WL200U */
+	{ USB_DEVICE(0x1371, 0x0002), USB_DEVICE_DATA(BOARD_503) },
+	/* BenQ AWL400 USB stick */
+	{ USB_DEVICE(0x04a5, 0x9001), USB_DEVICE_DATA(BOARD_503) },
+	/* 3Com 3CRSHEW696 */
+	{ USB_DEVICE(0x0506, 0x0a01), USB_DEVICE_DATA(BOARD_503) },
+	/* Siemens Santis ADSL WLAN USB adapter WLL 013 */
+	{ USB_DEVICE(0x0681, 0x001b), USB_DEVICE_DATA(BOARD_503) },
+	/* Belkin F5D6050, version 2 */
+	{ USB_DEVICE(0x050d, 0x0050), USB_DEVICE_DATA(BOARD_503) },
+	/* iBlitzz, BWU613 (not *B or *SB) */
+	{ USB_DEVICE(0x07b8, 0xb000), USB_DEVICE_DATA(BOARD_503) },
+	/* Gigabyte GN-WLBM101 */
+	{ USB_DEVICE(0x1044, 0x8003), USB_DEVICE_DATA(BOARD_503) },
+	/* Planex GW-US11S */
+	{ USB_DEVICE(0x2019, 0x3220), USB_DEVICE_DATA(BOARD_503) },
+	/* Internal WLAN adapter in h5[4,5]xx series iPAQs */
+	{ USB_DEVICE(0x049f, 0x0032), USB_DEVICE_DATA(BOARD_503) },
+	/* Corega Wireless LAN USB-11 mini */
+	{ USB_DEVICE(0x07aa, 0x0011), USB_DEVICE_DATA(BOARD_503) },
+	/* Corega Wireless LAN USB-11 mini2 */
+	{ USB_DEVICE(0x07aa, 0x0018), USB_DEVICE_DATA(BOARD_503) },
+	/* Uniden PCW100 */
+	{ USB_DEVICE(0x05dd, 0xff35), USB_DEVICE_DATA(BOARD_503) },
+	/*
+	 * at76c503-rfmd-acc
+	 */
+	/* SMC2664W */
+	{ USB_DEVICE(0x083a, 0x3501), USB_DEVICE_DATA(BOARD_503_ACC) },
+	/* Belkin F5D6050, SMC2662W v2, SMC2662W-AR */
+	{ USB_DEVICE(0x0d5c, 0xa002), USB_DEVICE_DATA(BOARD_503_ACC) },
+	/*
+	 * at76c505-rfmd
+	 */
+	/* Generic AT76C505/RFMD */
+	{ USB_DEVICE(0x03eb, 0x7606), USB_DEVICE_DATA(BOARD_505) },
+	/*
+	 * at76c505-rfmd2958
+	 */
+	/* Generic AT76C505/RFMD, OvisLink WL-1130USB */
+	{ USB_DEVICE(0x03eb, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* Fiberline FL-WL240U */
+	{ USB_DEVICE(0x1371, 0x0014), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* CNet CNUSB-611G */
+	{ USB_DEVICE(0x1371, 0x0013), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* Linksys WUSB11 v2.8 */
+	{ USB_DEVICE(0x1915, 0x2233), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* Xterasys XN-2122B, IBlitzz BWU613B/BWU613SB */
+	{ USB_DEVICE(0x12fd, 0x1001), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* Corega WLAN USB Stick 11 */
+	{ USB_DEVICE(0x07aa, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
+	/* Microstar MSI Box MS6978 */
+	{ USB_DEVICE(0x0db0, 0x1020), USB_DEVICE_DATA(BOARD_505_2958) },
+	/*
+	 * at76c505a-rfmd2958
+	 */
+	/* Generic AT76C505A device */
+	{ USB_DEVICE(0x03eb, 0x7614), USB_DEVICE_DATA(BOARD_505A) },
+	/* Generic AT76C505AS device */
+	{ USB_DEVICE(0x03eb, 0x7617), USB_DEVICE_DATA(BOARD_505A) },
+	/* Siemens Gigaset USB WLAN Adapter 11 */
+	{ USB_DEVICE(0x1690, 0x0701), USB_DEVICE_DATA(BOARD_505A) },
+	/*
+	 * at76c505amx-rfmd
+	 */
+	/* Generic AT76C505AMX device */
+	{ USB_DEVICE(0x03eb, 0x7615), USB_DEVICE_DATA(BOARD_505AMX) },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, dev_table);
+
+/* Supported rates of this hardware, bit 7 marks basic rates */
+static const u8 hw_rates[] = { 0x82, 0x84, 0x0b, 0x16 };
+
+static const char *const preambles[] = { "long", "short", "auto" };
+
+/* Firmware download */
+/* DFU states */
+#define STATE_IDLE			0x00
+#define STATE_DETACH			0x01
+#define STATE_DFU_IDLE			0x02
+#define STATE_DFU_DOWNLOAD_SYNC		0x03
+#define STATE_DFU_DOWNLOAD_BUSY		0x04
+#define STATE_DFU_DOWNLOAD_IDLE		0x05
+#define STATE_DFU_MANIFEST_SYNC		0x06
+#define STATE_DFU_MANIFEST		0x07
+#define STATE_DFU_MANIFEST_WAIT_RESET	0x08
+#define STATE_DFU_UPLOAD_IDLE		0x09
+#define STATE_DFU_ERROR			0x0a
+
+/* DFU commands */
+#define DFU_DETACH			0
+#define DFU_DNLOAD			1
+#define DFU_UPLOAD			2
+#define DFU_GETSTATUS			3
+#define DFU_CLRSTATUS			4
+#define DFU_GETSTATE			5
+#define DFU_ABORT			6
+
+#define FW_BLOCK_SIZE 1024
+
+struct dfu_status {
+	unsigned char status;
+	unsigned char poll_timeout[3];
+	unsigned char state;
+	unsigned char string;
+} __attribute__((packed));
+
+static inline int at76_is_intersil(enum board_type board)
+{
+	return (board == BOARD_503_ISL3861 || board == BOARD_503_ISL3863);
+}
+
+static inline int at76_is_503rfmd(enum board_type board)
+{
+	return (board == BOARD_503 || board == BOARD_503_ACC);
+}
+
+static inline int at76_is_505a(enum board_type board)
+{
+	return (board == BOARD_505A || board == BOARD_505AMX);
+}
+
+/* Load a block of the first (internal) part of the firmware */
+static int at76_load_int_fw_block(struct usb_device *udev, int blockno,
+				  void *block, int size)
+{
+	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), DFU_DNLOAD,
+			       USB_TYPE_CLASS | USB_DIR_OUT |
+			       USB_RECIP_INTERFACE, blockno, 0, block, size,
+			       USB_CTRL_GET_TIMEOUT);
+}
+
+static int at76_dfu_get_status(struct usb_device *udev,
+			       struct dfu_status *status)
+{
+	int ret;
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATUS,
+			      USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
+			      0, 0, status, sizeof(struct dfu_status),
+			      USB_CTRL_GET_TIMEOUT);
+	return ret;
+}
+
+static u8 at76_dfu_get_state(struct usb_device *udev, u8 *state)
+{
+	int ret;
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATE,
+			      USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
+			      0, 0, state, 1, USB_CTRL_GET_TIMEOUT);
+	return ret;
+}
+
+/* Convert timeout from the DFU status to jiffies */
+static inline unsigned long at76_get_timeout(struct dfu_status *s)
+{
+	return msecs_to_jiffies((s->poll_timeout[2] << 16)
+				| (s->poll_timeout[1] << 8)
+				| (s->poll_timeout[0]));
+}
+
+/* Load internal firmware from the buffer.  If manifest_sync_timeout > 0, use
+ * its value in jiffies in the MANIFEST_SYNC state.  */
+static int at76_usbdfu_download(struct usb_device *udev, u8 *buf, u32 size,
+				int manifest_sync_timeout)
+{
+	u8 *block;
+	struct dfu_status dfu_stat_buf;
+	int ret = 0;
+	int need_dfu_state = 1;
+	int is_done = 0;
+	u8 dfu_state = 0;
+	u32 dfu_timeout = 0;
+	int bsize = 0;
+	int blockno = 0;
+
+	at76_dbg(DBG_DFU, "%s( %p, %u, %d)", __func__, buf, size,
+		 manifest_sync_timeout);
+
+	if (!size) {
+		dev_printk(KERN_ERR, &udev->dev, "FW buffer length invalid!\n");
+		return -EINVAL;
+	}
+
+	block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
+	if (!block)
+		return -ENOMEM;
+
+	do {
+		if (need_dfu_state) {
+			ret = at76_dfu_get_state(udev, &dfu_state);
+			if (ret < 0) {
+				dev_printk(KERN_ERR, &udev->dev,
+					   "cannot get DFU state: %d\n", ret);
+				goto exit;
+			}
+			need_dfu_state = 0;
+		}
+
+		switch (dfu_state) {
+		case STATE_DFU_DOWNLOAD_SYNC:
+			at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_SYNC");
+			ret = at76_dfu_get_status(udev, &dfu_stat_buf);
+			if (ret >= 0) {
+				dfu_state = dfu_stat_buf.state;
+				dfu_timeout = at76_get_timeout(&dfu_stat_buf);
+				need_dfu_state = 0;
+			} else
+				dev_printk(KERN_ERR, &udev->dev,
+					   "at76_dfu_get_status returned %d\n",
+					   ret);
+			break;
+
+		case STATE_DFU_DOWNLOAD_BUSY:
+			at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_BUSY");
+			need_dfu_state = 1;
+
+			at76_dbg(DBG_DFU, "DFU: Resetting device");
+			schedule_timeout_interruptible(dfu_timeout);
+			break;
+
+		case STATE_DFU_DOWNLOAD_IDLE:
+			at76_dbg(DBG_DFU, "DOWNLOAD...");
+			/* fall through */
+		case STATE_DFU_IDLE:
+			at76_dbg(DBG_DFU, "DFU IDLE");
+
+			bsize = min_t(int, size, FW_BLOCK_SIZE);
+			memcpy(block, buf, bsize);
+			at76_dbg(DBG_DFU, "int fw, size left = %5d, "
+				 "bsize = %4d, blockno = %2d", size, bsize,
+				 blockno);
+			ret =
+			    at76_load_int_fw_block(udev, blockno, block, bsize);
+			buf += bsize;
+			size -= bsize;
+			blockno++;
+
+			if (ret != bsize)
+				dev_printk(KERN_ERR, &udev->dev,
+					   "at76_load_int_fw_block "
+					   "returned %d\n", ret);
+			need_dfu_state = 1;
+			break;
+
+		case STATE_DFU_MANIFEST_SYNC:
+			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_SYNC");
+
+			ret = at76_dfu_get_status(udev, &dfu_stat_buf);
+			if (ret < 0)
+				break;
+
+			dfu_state = dfu_stat_buf.state;
+			dfu_timeout = at76_get_timeout(&dfu_stat_buf);
+			need_dfu_state = 0;
+
+			/* override the timeout from the status response,
+			   needed for AT76C505A */
+			if (manifest_sync_timeout > 0)
+				dfu_timeout = manifest_sync_timeout;
+
+			at76_dbg(DBG_DFU, "DFU: Waiting for manifest phase");
+			schedule_timeout_interruptible(dfu_timeout);
+			break;
+
+		case STATE_DFU_MANIFEST:
+			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST");
+			is_done = 1;
+			break;
+
+		case STATE_DFU_MANIFEST_WAIT_RESET:
+			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_WAIT_RESET");
+			is_done = 1;
+			break;
+
+		case STATE_DFU_UPLOAD_IDLE:
+			at76_dbg(DBG_DFU, "STATE_DFU_UPLOAD_IDLE");
+			break;
+
+		case STATE_DFU_ERROR:
+			at76_dbg(DBG_DFU, "STATE_DFU_ERROR");
+			ret = -EPIPE;
+			break;
+
+		default:
+			at76_dbg(DBG_DFU, "DFU UNKNOWN STATE (%d)", dfu_state);
+			ret = -EINVAL;
+			break;
+		}
+	} while (!is_done && (ret >= 0));
+
+exit:
+	kfree(block);
+	if (ret >= 0)
+		ret = 0;
+
+	return ret;
+}
+
+#define HEX2STR_BUFFERS 4
+#define HEX2STR_MAX_LEN 64
+#define BIN2HEX(x) ((x) < 10 ? '0' + (x) : (x) + 'A' - 10)
+
+/* Convert binary data into hex string */
+static char *hex2str(void *buf, int len)
+{
+	static atomic_t a = ATOMIC_INIT(0);
+	static char bufs[HEX2STR_BUFFERS][3 * HEX2STR_MAX_LEN + 1];
+	char *ret = bufs[atomic_inc_return(&a) & (HEX2STR_BUFFERS - 1)];
+	char *obuf = ret;
+	u8 *ibuf = buf;
+
+	if (len > HEX2STR_MAX_LEN)
+		len = HEX2STR_MAX_LEN;
+
+	if (len <= 0) {
+		ret[0] = '\0';
+		return ret;
+	}
+
+	while (len--) {
+		*obuf++ = BIN2HEX(*ibuf >> 4);
+		*obuf++ = BIN2HEX(*ibuf & 0xf);
+		*obuf++ = '-';
+		ibuf++;
+	}
+	*(--obuf) = '\0';
+
+	return ret;
+}
+
+#define MAC2STR_BUFFERS 4
+
+static inline char *mac2str(u8 *mac)
+{
+	static atomic_t a = ATOMIC_INIT(0);
+	static char bufs[MAC2STR_BUFFERS][6 * 3];
+	char *str;
+
+	str = bufs[atomic_inc_return(&a) & (MAC2STR_BUFFERS - 1)];
+	sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
+		mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+	return str;
+}
+
+/* LED trigger */
+static int tx_activity;
+static void at76_ledtrig_tx_timerfunc(unsigned long data);
+static DEFINE_TIMER(ledtrig_tx_timer, at76_ledtrig_tx_timerfunc, 0, 0);
+DEFINE_LED_TRIGGER(ledtrig_tx);
+
+static void at76_ledtrig_tx_timerfunc(unsigned long data)
+{
+	static int tx_lastactivity;
+
+	if (tx_lastactivity != tx_activity) {
+		tx_lastactivity = tx_activity;
+		led_trigger_event(ledtrig_tx, LED_FULL);
+		mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
+	} else
+		led_trigger_event(ledtrig_tx, LED_OFF);
+}
+
+static void at76_ledtrig_tx_activity(void)
+{
+	tx_activity++;
+	if (!timer_pending(&ledtrig_tx_timer))
+		mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
+}
+
+static int at76_remap(struct usb_device *udev)
+{
+	int ret;
+	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0a,
+			      USB_TYPE_VENDOR | USB_DIR_OUT |
+			      USB_RECIP_INTERFACE, 0, 0, NULL, 0,
+			      USB_CTRL_GET_TIMEOUT);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static int at76_get_op_mode(struct usb_device *udev)
+{
+	int ret;
+	u8 op_mode;
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
+			      USB_TYPE_VENDOR | USB_DIR_IN |
+			      USB_RECIP_INTERFACE, 0x01, 0, &op_mode, 1,
+			      USB_CTRL_GET_TIMEOUT);
+	if (ret < 0)
+		return ret;
+	else if (ret < 1)
+		return -EIO;
+	else
+		return op_mode;
+}
+
+/* Load a block of the second ("external") part of the firmware */
+static inline int at76_load_ext_fw_block(struct usb_device *udev, int blockno,
+					 void *block, int size)
+{
+	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
+			       USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+			       0x0802, blockno, block, size,
+			       USB_CTRL_GET_TIMEOUT);
+}
+
+static inline int at76_get_hw_cfg(struct usb_device *udev,
+				  union at76_hwcfg *buf, int buf_size)
+{
+	return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
+			       USB_TYPE_VENDOR | USB_DIR_IN |
+			       USB_RECIP_INTERFACE, 0x0a02, 0,
+			       buf, buf_size, USB_CTRL_GET_TIMEOUT);
+}
+
+/* Intersil boards use a different "value" for GetHWConfig requests */
+static inline int at76_get_hw_cfg_intersil(struct usb_device *udev,
+					   union at76_hwcfg *buf, int buf_size)
+{
+	return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
+			       USB_TYPE_VENDOR | USB_DIR_IN |
+			       USB_RECIP_INTERFACE, 0x0902, 0,
+			       buf, buf_size, USB_CTRL_GET_TIMEOUT);
+}
+
+/* Get the hardware configuration for the adapter and put it to the appropriate
+ * fields of 'priv' (the GetHWConfig request and interpretation of the result
+ * depends on the board type) */
+static int at76_get_hw_config(struct at76_priv *priv)
+{
+	int ret;
+	union at76_hwcfg *hwcfg = kmalloc(sizeof(*hwcfg), GFP_KERNEL);
+
+	if (!hwcfg)
+		return -ENOMEM;
+
+	if (at76_is_intersil(priv->board_type)) {
+		ret = at76_get_hw_cfg_intersil(priv->udev, hwcfg,
+					       sizeof(hwcfg->i));
+		if (ret < 0)
+			goto exit;
+		memcpy(priv->mac_addr, hwcfg->i.mac_addr, ETH_ALEN);
+		priv->regulatory_domain = hwcfg->i.regulatory_domain;
+	} else if (at76_is_503rfmd(priv->board_type)) {
+		ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r3));
+		if (ret < 0)
+			goto exit;
+		memcpy(priv->mac_addr, hwcfg->r3.mac_addr, ETH_ALEN);
+		priv->regulatory_domain = hwcfg->r3.regulatory_domain;
+	} else {
+		ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r5));
+		if (ret < 0)
+			goto exit;
+		memcpy(priv->mac_addr, hwcfg->r5.mac_addr, ETH_ALEN);
+		priv->regulatory_domain = hwcfg->r5.regulatory_domain;
+	}
+
+exit:
+	kfree(hwcfg);
+	if (ret < 0)
+		printk(KERN_ERR "%s: cannot get HW Config (error %d)\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static struct reg_domain const *at76_get_reg_domain(u16 code)
+{
+	int i;
+	static struct reg_domain const fd_tab[] = {
+		{ 0x10, "FCC (USA)", 0x7ff },	/* ch 1-11 */
+		{ 0x20, "IC (Canada)", 0x7ff },	/* ch 1-11 */
+		{ 0x30, "ETSI (most of Europe)", 0x1fff },	/* ch 1-13 */
+		{ 0x31, "Spain", 0x600 },	/* ch 10-11 */
+		{ 0x32, "France", 0x1e00 },	/* ch 10-13 */
+		{ 0x40, "MKK (Japan)", 0x2000 },	/* ch 14 */
+		{ 0x41, "MKK1 (Japan)", 0x3fff },	/* ch 1-14 */
+		{ 0x50, "Israel", 0x3fc },	/* ch 3-9 */
+		{ 0x00, "<unknown>", 0xffffffff }	/* ch 1-32 */
+	};
+
+	/* Last entry is fallback for unknown domain code */
+	for (i = 0; i < ARRAY_SIZE(fd_tab) - 1; i++)
+		if (code == fd_tab[i].code)
+			break;
+
+	return &fd_tab[i];
+}
+
+static inline int at76_get_mib(struct usb_device *udev, u16 mib, void *buf,
+			       int buf_size)
+{
+	int ret;
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
+			      USB_TYPE_VENDOR | USB_DIR_IN |
+			      USB_RECIP_INTERFACE, mib << 8, 0, buf, buf_size,
+			      USB_CTRL_GET_TIMEOUT);
+	if (ret >= 0 && ret != buf_size)
+		return -EIO;
+	return ret;
+}
+
+/* Return positive number for status, negative for an error */
+static inline int at76_get_cmd_status(struct usb_device *udev, u8 cmd)
+{
+	u8 stat_buf[40];
+	int ret;
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x22,
+			      USB_TYPE_VENDOR | USB_DIR_IN |
+			      USB_RECIP_INTERFACE, cmd, 0, stat_buf,
+			      sizeof(stat_buf), USB_CTRL_GET_TIMEOUT);
+	if (ret < 0)
+		return ret;
+
+	return stat_buf[5];
+}
+
+#define MAKE_CMD_CASE(c) case (c): return #c
+
+static const char *at76_get_cmd_string(u8 cmd_status)
+{
+	switch (cmd_status) {
+		MAKE_CMD_CASE(CMD_SET_MIB);
+		MAKE_CMD_CASE(CMD_GET_MIB);
+		MAKE_CMD_CASE(CMD_SCAN);
+		MAKE_CMD_CASE(CMD_JOIN);
+		MAKE_CMD_CASE(CMD_START_IBSS);
+		MAKE_CMD_CASE(CMD_RADIO_ON);
+		MAKE_CMD_CASE(CMD_RADIO_OFF);
+		MAKE_CMD_CASE(CMD_STARTUP);
+	}
+
+	return "UNKNOWN";
+}
+
+static int at76_set_card_command(struct usb_device *udev, int cmd, void *buf,
+				 int buf_size)
+{
+	int ret;
+	struct at76_command *cmd_buf = kmalloc(sizeof(struct at76_command) +
+					       buf_size, GFP_KERNEL);
+
+	if (!cmd_buf)
+		return -ENOMEM;
+
+	cmd_buf->cmd = cmd;
+	cmd_buf->reserved = 0;
+	cmd_buf->size = cpu_to_le16(buf_size);
+	memcpy(cmd_buf->data, buf, buf_size);
+
+	at76_dbg_dump(DBG_CMD, cmd_buf, sizeof(struct at76_command) + buf_size,
+		      "issuing command %s (0x%02x)",
+		      at76_get_cmd_string(cmd), cmd);
+
+	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
+			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+			      0, 0, cmd_buf,
+			      sizeof(struct at76_command) + buf_size,
+			      USB_CTRL_GET_TIMEOUT);
+	kfree(cmd_buf);
+	return ret;
+}
+
+#define MAKE_CMD_STATUS_CASE(c)	case (c): return #c
+static const char *at76_get_cmd_status_string(u8 cmd_status)
+{
+	switch (cmd_status) {
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_IDLE);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_COMPLETE);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_UNKNOWN);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_INVALID_PARAMETER);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_FUNCTION_NOT_SUPPORTED);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_TIME_OUT);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_IN_PROGRESS);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_HOST_FAILURE);
+		MAKE_CMD_STATUS_CASE(CMD_STATUS_SCAN_FAILED);
+	}
+
+	return "UNKNOWN";
+}
+
+/* Wait until the command is completed */
+static int at76_wait_completion(struct at76_priv *priv, int cmd)
+{
+	int status = 0;
+	unsigned long timeout = jiffies + CMD_COMPLETION_TIMEOUT;
+
+	do {
+		status = at76_get_cmd_status(priv->udev, cmd);
+		if (status < 0) {
+			printk(KERN_ERR "%s: at76_get_cmd_status failed: %d\n",
+			       wiphy_name(priv->hw->wiphy), status);
+			break;
+		}
+
+		at76_dbg(DBG_WAIT_COMPLETE,
+			 "%s: Waiting on cmd %d, status = %d (%s)",
+			 wiphy_name(priv->hw->wiphy), cmd, status,
+			 at76_get_cmd_status_string(status));
+
+		if (status != CMD_STATUS_IN_PROGRESS
+		    && status != CMD_STATUS_IDLE)
+			break;
+
+		schedule_timeout_interruptible(HZ / 10);	/* 100 ms */
+		if (time_after(jiffies, timeout)) {
+			printk(KERN_ERR
+			       "%s: completion timeout for command %d\n",
+			       wiphy_name(priv->hw->wiphy), cmd);
+			status = -ETIMEDOUT;
+			break;
+		}
+	} while (1);
+
+	return status;
+}
+
+static int at76_set_mib(struct at76_priv *priv, struct set_mib_buffer *buf)
+{
+	int ret;
+
+	ret = at76_set_card_command(priv->udev, CMD_SET_MIB, buf,
+				    offsetof(struct set_mib_buffer,
+					     data) + buf->size);
+	if (ret < 0)
+		return ret;
+
+	ret = at76_wait_completion(priv, CMD_SET_MIB);
+	if (ret != CMD_STATUS_COMPLETE) {
+		printk(KERN_INFO
+		       "%s: set_mib: at76_wait_completion failed "
+		       "with %d\n", wiphy_name(priv->hw->wiphy), ret);
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+/* Return < 0 on error, == 0 if no command sent, == 1 if cmd sent */
+static int at76_set_radio(struct at76_priv *priv, int enable)
+{
+	int ret;
+	int cmd;
+
+	if (priv->radio_on == enable)
+		return 0;
+
+	cmd = enable ? CMD_RADIO_ON : CMD_RADIO_OFF;
+
+	ret = at76_set_card_command(priv->udev, cmd, NULL, 0);
+	if (ret < 0)
+		printk(KERN_ERR "%s: at76_set_card_command(%d) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), cmd, ret);
+	else
+		ret = 1;
+
+	priv->radio_on = enable;
+	return ret;
+}
+
+/* Set current power save mode (AT76_PM_OFF/AT76_PM_ON/AT76_PM_SMART) */
+static int at76_set_pm_mode(struct at76_priv *priv)
+{
+	int ret = 0;
+
+	priv->mib_buf.type = MIB_MAC_MGMT;
+	priv->mib_buf.size = 1;
+	priv->mib_buf.index = offsetof(struct mib_mac_mgmt, power_mgmt_mode);
+	priv->mib_buf.data.byte = priv->pm_mode;
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (pm_mode) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static int at76_set_preamble(struct at76_priv *priv, u8 type)
+{
+	int ret = 0;
+
+	priv->mib_buf.type = MIB_LOCAL;
+	priv->mib_buf.size = 1;
+	priv->mib_buf.index = offsetof(struct mib_local, preamble_type);
+	priv->mib_buf.data.byte = type;
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (preamble) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static int at76_set_frag(struct at76_priv *priv, u16 size)
+{
+	int ret = 0;
+
+	priv->mib_buf.type = MIB_MAC;
+	priv->mib_buf.size = 2;
+	priv->mib_buf.index = offsetof(struct mib_mac, frag_threshold);
+	priv->mib_buf.data.word = cpu_to_le16(size);
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (frag threshold) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static int at76_set_rts(struct at76_priv *priv, u16 size)
+{
+	int ret = 0;
+
+	priv->mib_buf.type = MIB_MAC;
+	priv->mib_buf.size = 2;
+	priv->mib_buf.index = offsetof(struct mib_mac, rts_threshold);
+	priv->mib_buf.data.word = cpu_to_le16(size);
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (rts) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static int at76_set_autorate_fallback(struct at76_priv *priv, int onoff)
+{
+	int ret = 0;
+
+	priv->mib_buf.type = MIB_LOCAL;
+	priv->mib_buf.size = 1;
+	priv->mib_buf.index = offsetof(struct mib_local, txautorate_fallback);
+	priv->mib_buf.data.byte = onoff;
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (autorate fallback) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	return ret;
+}
+
+static void at76_dump_mib_mac_addr(struct at76_priv *priv)
+{
+	int i;
+	int ret;
+	struct mib_mac_addr *m = kmalloc(sizeof(struct mib_mac_addr),
+					 GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_MAC_ADDR, m,
+			   sizeof(struct mib_mac_addr));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (MAC_ADDR) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: mac_addr %s res 0x%x 0x%x",
+		 wiphy_name(priv->hw->wiphy),
+		 mac2str(m->mac_addr), m->res[0], m->res[1]);
+	for (i = 0; i < ARRAY_SIZE(m->group_addr); i++)
+		at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: group addr %d: %s, "
+			 "status %d", wiphy_name(priv->hw->wiphy), i,
+			 mac2str(m->group_addr[i]), m->group_addr_status[i]);
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_mac_wep(struct at76_priv *priv)
+{
+	int i;
+	int ret;
+	int key_len;
+	struct mib_mac_wep *m = kmalloc(sizeof(struct mib_mac_wep), GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_MAC_WEP, m,
+			   sizeof(struct mib_mac_wep));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (MAC_WEP) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: priv_invoked %u def_key_id %u "
+		 "key_len %u excl_unencr %u wep_icv_err %u wep_excluded %u "
+		 "encr_level %u key %d", wiphy_name(priv->hw->wiphy),
+		 m->privacy_invoked, m->wep_default_key_id,
+		 m->wep_key_mapping_len, m->exclude_unencrypted,
+		 le32_to_cpu(m->wep_icv_error_count),
+		 le32_to_cpu(m->wep_excluded_count), m->encryption_level,
+		 m->wep_default_key_id);
+
+	key_len = (m->encryption_level == 1) ?
+	    WEP_SMALL_KEY_LEN : WEP_LARGE_KEY_LEN;
+
+	for (i = 0; i < WEP_KEYS; i++)
+		at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: key %d: %s",
+			 wiphy_name(priv->hw->wiphy), i,
+			 hex2str(m->wep_default_keyvalue[i], key_len));
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_mac_mgmt(struct at76_priv *priv)
+{
+	int ret;
+	struct mib_mac_mgmt *m = kmalloc(sizeof(struct mib_mac_mgmt),
+					 GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_MAC_MGMT, m,
+			   sizeof(struct mib_mac_mgmt));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (MAC_MGMT) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB MAC_MGMT: beacon_period %d CFP_max_duration "
+		 "%d medium_occupancy_limit %d station_id 0x%x ATIM_window %d "
+		 "CFP_mode %d privacy_opt_impl %d DTIM_period %d CFP_period %d "
+		 "current_bssid %s current_essid %s current_bss_type %d "
+		 "pm_mode %d ibss_change %d res %d "
+		 "multi_domain_capability_implemented %d "
+		 "international_roaming %d country_string %.3s",
+		 wiphy_name(priv->hw->wiphy), le16_to_cpu(m->beacon_period),
+		 le16_to_cpu(m->CFP_max_duration),
+		 le16_to_cpu(m->medium_occupancy_limit),
+		 le16_to_cpu(m->station_id), le16_to_cpu(m->ATIM_window),
+		 m->CFP_mode, m->privacy_option_implemented, m->DTIM_period,
+		 m->CFP_period, mac2str(m->current_bssid),
+		 hex2str(m->current_essid, IW_ESSID_MAX_SIZE),
+		 m->current_bss_type, m->power_mgmt_mode, m->ibss_change,
+		 m->res, m->multi_domain_capability_implemented,
+		 m->multi_domain_capability_enabled, m->country_string);
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_mac(struct at76_priv *priv)
+{
+	int ret;
+	struct mib_mac *m = kmalloc(sizeof(struct mib_mac), GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_MAC, m, sizeof(struct mib_mac));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (MAC) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB MAC: max_tx_msdu_lifetime %d "
+		 "max_rx_lifetime %d frag_threshold %d rts_threshold %d "
+		 "cwmin %d cwmax %d short_retry_time %d long_retry_time %d "
+		 "scan_type %d scan_channel %d probe_delay %u "
+		 "min_channel_time %d max_channel_time %d listen_int %d "
+		 "desired_ssid %s desired_bssid %s desired_bsstype %d",
+		 wiphy_name(priv->hw->wiphy),
+		 le32_to_cpu(m->max_tx_msdu_lifetime),
+		 le32_to_cpu(m->max_rx_lifetime),
+		 le16_to_cpu(m->frag_threshold), le16_to_cpu(m->rts_threshold),
+		 le16_to_cpu(m->cwmin), le16_to_cpu(m->cwmax),
+		 m->short_retry_time, m->long_retry_time, m->scan_type,
+		 m->scan_channel, le16_to_cpu(m->probe_delay),
+		 le16_to_cpu(m->min_channel_time),
+		 le16_to_cpu(m->max_channel_time),
+		 le16_to_cpu(m->listen_interval),
+		 hex2str(m->desired_ssid, IW_ESSID_MAX_SIZE),
+		 mac2str(m->desired_bssid), m->desired_bsstype);
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_phy(struct at76_priv *priv)
+{
+	int ret;
+	struct mib_phy *m = kmalloc(sizeof(struct mib_phy), GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_PHY, m, sizeof(struct mib_phy));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (PHY) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB PHY: ed_threshold %d slot_time %d "
+		 "sifs_time %d preamble_length %d plcp_header_length %d "
+		 "mpdu_max_length %d cca_mode_supported %d operation_rate_set "
+		 "0x%x 0x%x 0x%x 0x%x channel_id %d current_cca_mode %d "
+		 "phy_type %d current_reg_domain %d",
+		 wiphy_name(priv->hw->wiphy), le32_to_cpu(m->ed_threshold),
+		 le16_to_cpu(m->slot_time), le16_to_cpu(m->sifs_time),
+		 le16_to_cpu(m->preamble_length),
+		 le16_to_cpu(m->plcp_header_length),
+		 le16_to_cpu(m->mpdu_max_length),
+		 le16_to_cpu(m->cca_mode_supported), m->operation_rate_set[0],
+		 m->operation_rate_set[1], m->operation_rate_set[2],
+		 m->operation_rate_set[3], m->channel_id, m->current_cca_mode,
+		 m->phy_type, m->current_reg_domain);
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_local(struct at76_priv *priv)
+{
+	int ret;
+	struct mib_local *m = kmalloc(sizeof(struct mib_phy), GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_LOCAL, m, sizeof(struct mib_local));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (LOCAL) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB LOCAL: beacon_enable %d "
+		 "txautorate_fallback %d ssid_size %d promiscuous_mode %d "
+		 "preamble_type %d", wiphy_name(priv->hw->wiphy),
+		 m->beacon_enable,
+		 m->txautorate_fallback, m->ssid_size, m->promiscuous_mode,
+		 m->preamble_type);
+exit:
+	kfree(m);
+}
+
+static void at76_dump_mib_mdomain(struct at76_priv *priv)
+{
+	int ret;
+	struct mib_mdomain *m = kmalloc(sizeof(struct mib_mdomain), GFP_KERNEL);
+
+	if (!m)
+		return;
+
+	ret = at76_get_mib(priv->udev, MIB_MDOMAIN, m,
+			   sizeof(struct mib_mdomain));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_get_mib (MDOMAIN) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: channel_list %s",
+		 wiphy_name(priv->hw->wiphy),
+		 hex2str(m->channel_list, sizeof(m->channel_list)));
+
+	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: tx_powerlevel %s",
+		 wiphy_name(priv->hw->wiphy),
+		 hex2str(m->tx_powerlevel, sizeof(m->tx_powerlevel)));
+exit:
+	kfree(m);
+}
+
+/* Enable monitor mode */
+static int at76_start_monitor(struct at76_priv *priv)
+{
+	struct at76_req_scan scan;
+	int ret;
+
+	memset(&scan, 0, sizeof(struct at76_req_scan));
+	memset(scan.bssid, 0xff, ETH_ALEN);
+
+	scan.channel = priv->channel;
+	scan.scan_type = SCAN_TYPE_PASSIVE;
+	scan.international_scan = 0;
+
+	ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
+	if (ret >= 0)
+		ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
+
+	return ret;
+}
+
+/* Calculate padding from txbuf->wlength (which excludes the USB TX header),
+   likely to compensate a flaw in the AT76C503A USB part ... */
+static inline int at76_calc_padding(int wlen)
+{
+	/* add the USB TX header */
+	wlen += AT76_TX_HDRLEN;
+
+	wlen = wlen % 64;
+
+	if (wlen < 50)
+		return 50 - wlen;
+
+	if (wlen >= 61)
+		return 64 + 50 - wlen;
+
+	return 0;
+}
+
+static void at76_rx_callback(struct urb *urb)
+{
+	struct at76_priv *priv = urb->context;
+
+	priv->rx_tasklet.data = (unsigned long)urb;
+	tasklet_schedule(&priv->rx_tasklet);
+	return;
+}
+
+static int at76_submit_rx_urb(struct at76_priv *priv)
+{
+	int ret;
+	int size;
+	struct sk_buff *skb = priv->rx_skb;
+
+	if (!priv->rx_urb) {
+		printk(KERN_ERR "%s: %s: priv->rx_urb is NULL\n",
+		       wiphy_name(priv->hw->wiphy), __func__);
+		return -EFAULT;
+	}
+
+	if (!skb) {
+		skb = dev_alloc_skb(sizeof(struct at76_rx_buffer));
+		if (!skb) {
+			printk(KERN_ERR "%s: cannot allocate rx skbuff\n",
+			       wiphy_name(priv->hw->wiphy));
+			ret = -ENOMEM;
+			goto exit;
+		}
+		priv->rx_skb = skb;
+	} else {
+		skb_push(skb, skb_headroom(skb));
+		skb_trim(skb, 0);
+	}
+
+	size = skb_tailroom(skb);
+	usb_fill_bulk_urb(priv->rx_urb, priv->udev, priv->rx_pipe,
+			  skb_put(skb, size), size, at76_rx_callback, priv);
+	ret = usb_submit_urb(priv->rx_urb, GFP_ATOMIC);
+	if (ret < 0) {
+		if (ret == -ENODEV)
+			at76_dbg(DBG_DEVSTART,
+				 "usb_submit_urb returned -ENODEV");
+		else
+			printk(KERN_ERR "%s: rx, usb_submit_urb failed: %d\n",
+			       wiphy_name(priv->hw->wiphy), ret);
+	}
+
+exit:
+	if (ret < 0 && ret != -ENODEV)
+		printk(KERN_ERR "%s: cannot submit rx urb - please unload the "
+		       "driver and/or power cycle the device\n",
+		       wiphy_name(priv->hw->wiphy));
+
+	return ret;
+}
+
+/* Download external firmware */
+static int at76_load_external_fw(struct usb_device *udev, struct fwentry *fwe)
+{
+	int ret;
+	int op_mode;
+	int blockno = 0;
+	int bsize;
+	u8 *block;
+	u8 *buf = fwe->extfw;
+	int size = fwe->extfw_size;
+
+	if (!buf || !size)
+		return -ENOENT;
+
+	op_mode = at76_get_op_mode(udev);
+	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
+
+	if (op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
+		dev_printk(KERN_ERR, &udev->dev, "unexpected opmode %d\n",
+			   op_mode);
+		return -EINVAL;
+	}
+
+	block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
+	if (!block)
+		return -ENOMEM;
+
+	at76_dbg(DBG_DEVSTART, "downloading external firmware");
+
+	/* for fw >= 0.100, the device needs an extra empty block */
+	do {
+		bsize = min_t(int, size, FW_BLOCK_SIZE);
+		memcpy(block, buf, bsize);
+		at76_dbg(DBG_DEVSTART,
+			 "ext fw, size left = %5d, bsize = %4d, blockno = %2d",
+			 size, bsize, blockno);
+		ret = at76_load_ext_fw_block(udev, blockno, block, bsize);
+		if (ret != bsize) {
+			dev_printk(KERN_ERR, &udev->dev,
+				   "loading %dth firmware block failed: %d\n",
+				   blockno, ret);
+			goto exit;
+		}
+		buf += bsize;
+		size -= bsize;
+		blockno++;
+	} while (bsize > 0);
+
+	if (at76_is_505a(fwe->board_type)) {
+		at76_dbg(DBG_DEVSTART, "200 ms delay for 505a");
+		schedule_timeout_interruptible(HZ / 5 + 1);
+	}
+
+exit:
+	kfree(block);
+	if (ret < 0)
+		dev_printk(KERN_ERR, &udev->dev,
+			   "downloading external firmware failed: %d\n", ret);
+	return ret;
+}
+
+/* Download internal firmware */
+static int at76_load_internal_fw(struct usb_device *udev, struct fwentry *fwe)
+{
+	int ret;
+	int need_remap = !at76_is_505a(fwe->board_type);
+
+	ret = at76_usbdfu_download(udev, fwe->intfw, fwe->intfw_size,
+				   need_remap ? 0 : 2 * HZ);
+
+	if (ret < 0) {
+		dev_printk(KERN_ERR, &udev->dev,
+			   "downloading internal fw failed with %d\n", ret);
+		goto exit;
+	}
+
+	at76_dbg(DBG_DEVSTART, "sending REMAP");
+
+	/* no REMAP for 505A (see SF driver) */
+	if (need_remap) {
+		ret = at76_remap(udev);
+		if (ret < 0) {
+			dev_printk(KERN_ERR, &udev->dev,
+				   "sending REMAP failed with %d\n", ret);
+			goto exit;
+		}
+	}
+
+	at76_dbg(DBG_DEVSTART, "sleeping for 2 seconds");
+	schedule_timeout_interruptible(2 * HZ + 1);
+	usb_reset_device(udev);
+
+exit:
+	return ret;
+}
+
+static int at76_startup_device(struct at76_priv *priv)
+{
+	struct at76_card_config *ccfg = &priv->card_config;
+	int ret;
+
+	at76_dbg(DBG_PARAMS,
+		 "%s param: ssid %.*s (%s) mode %s ch %d wep %s key %d "
+		 "keylen %d", wiphy_name(priv->hw->wiphy), priv->essid_size,
+		 priv->essid, hex2str(priv->essid, IW_ESSID_MAX_SIZE),
+		 priv->iw_mode == IW_MODE_ADHOC ? "adhoc" : "infra",
+		 priv->channel, priv->wep_enabled ? "enabled" : "disabled",
+		 priv->wep_key_id, priv->wep_keys_len[priv->wep_key_id]);
+	at76_dbg(DBG_PARAMS,
+		 "%s param: preamble %s rts %d retry %d frag %d "
+		 "txrate %s auth_mode %d", wiphy_name(priv->hw->wiphy),
+		 preambles[priv->preamble_type], priv->rts_threshold,
+		 priv->short_retry_limit, priv->frag_threshold,
+		 priv->txrate == TX_RATE_1MBIT ? "1MBit" : priv->txrate ==
+		 TX_RATE_2MBIT ? "2MBit" : priv->txrate ==
+		 TX_RATE_5_5MBIT ? "5.5MBit" : priv->txrate ==
+		 TX_RATE_11MBIT ? "11MBit" : priv->txrate ==
+		 TX_RATE_AUTO ? "auto" : "<invalid>", priv->auth_mode);
+	at76_dbg(DBG_PARAMS,
+		 "%s param: pm_mode %d pm_period %d auth_mode %s "
+		 "scan_times %d %d scan_mode %s",
+		 wiphy_name(priv->hw->wiphy), priv->pm_mode, priv->pm_period,
+		 priv->auth_mode == WLAN_AUTH_OPEN ? "open" : "shared_secret",
+		 priv->scan_min_time, priv->scan_max_time,
+		 priv->scan_mode == SCAN_TYPE_ACTIVE ? "active" : "passive");
+
+	memset(ccfg, 0, sizeof(struct at76_card_config));
+	ccfg->promiscuous_mode = 0;
+	ccfg->short_retry_limit = priv->short_retry_limit;
+
+	if (priv->wep_enabled) {
+		if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
+			ccfg->encryption_type = 2;
+		else
+			ccfg->encryption_type = 1;
+
+		/* jal: always exclude unencrypted if WEP is active */
+		ccfg->exclude_unencrypted = 1;
+	} else {
+		ccfg->exclude_unencrypted = 0;
+		ccfg->encryption_type = 0;
+	}
+
+	ccfg->rts_threshold = cpu_to_le16(priv->rts_threshold);
+	ccfg->fragmentation_threshold = cpu_to_le16(priv->frag_threshold);
+
+	memcpy(ccfg->basic_rate_set, hw_rates, 4);
+	/* jal: really needed, we do a set_mib for autorate later ??? */
+	ccfg->auto_rate_fallback = (priv->txrate == TX_RATE_AUTO ? 1 : 0);
+	ccfg->channel = priv->channel;
+	ccfg->privacy_invoked = priv->wep_enabled;
+	memcpy(ccfg->current_ssid, priv->essid, IW_ESSID_MAX_SIZE);
+	ccfg->ssid_len = priv->essid_size;
+
+	ccfg->wep_default_key_id = priv->wep_key_id;
+	memcpy(ccfg->wep_default_key_value, priv->wep_keys,
+	       sizeof(priv->wep_keys));
+
+	ccfg->short_preamble = priv->preamble_type;
+	ccfg->beacon_period = cpu_to_le16(priv->beacon_period);
+
+	ret = at76_set_card_command(priv->udev, CMD_STARTUP, &priv->card_config,
+				    sizeof(struct at76_card_config));
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_set_card_command failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		return ret;
+	}
+
+	at76_wait_completion(priv, CMD_STARTUP);
+
+	/* remove BSSID from previous run */
+	memset(priv->bssid, 0, ETH_ALEN);
+
+	if (at76_set_radio(priv, 1) == 1)
+		at76_wait_completion(priv, CMD_RADIO_ON);
+
+	ret = at76_set_preamble(priv, priv->preamble_type);
+	if (ret < 0)
+		return ret;
+
+	ret = at76_set_frag(priv, priv->frag_threshold);
+	if (ret < 0)
+		return ret;
+
+	ret = at76_set_rts(priv, priv->rts_threshold);
+	if (ret < 0)
+		return ret;
+
+	ret = at76_set_autorate_fallback(priv,
+					 priv->txrate == TX_RATE_AUTO ? 1 : 0);
+	if (ret < 0)
+		return ret;
+
+	ret = at76_set_pm_mode(priv);
+	if (ret < 0)
+		return ret;
+
+	if (at76_debug & DBG_MIB) {
+		at76_dump_mib_mac(priv);
+		at76_dump_mib_mac_addr(priv);
+		at76_dump_mib_mac_mgmt(priv);
+		at76_dump_mib_mac_wep(priv);
+		at76_dump_mib_mdomain(priv);
+		at76_dump_mib_phy(priv);
+		at76_dump_mib_local(priv);
+	}
+
+	return 0;
+}
+
+/* Enable or disable promiscuous mode */
+static void at76_work_set_promisc(struct work_struct *work)
+{
+	struct at76_priv *priv = container_of(work, struct at76_priv,
+					      work_set_promisc);
+	int ret = 0;
+
+	mutex_lock(&priv->mtx);
+
+	priv->mib_buf.type = MIB_LOCAL;
+	priv->mib_buf.size = 1;
+	priv->mib_buf.index = offsetof(struct mib_local, promiscuous_mode);
+	priv->mib_buf.data.byte = priv->promisc ? 1 : 0;
+
+	ret = at76_set_mib(priv, &priv->mib_buf);
+	if (ret < 0)
+		printk(KERN_ERR "%s: set_mib (promiscuous_mode) failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+
+	mutex_unlock(&priv->mtx);
+}
+
+/* Submit Rx urb back to the device */
+static void at76_work_submit_rx(struct work_struct *work)
+{
+	struct at76_priv *priv = container_of(work, struct at76_priv,
+					      work_submit_rx);
+
+	mutex_lock(&priv->mtx);
+	at76_submit_rx_urb(priv);
+	mutex_unlock(&priv->mtx);
+}
+
+static void at76_rx_tasklet(unsigned long param)
+{
+	struct urb *urb = (struct urb *)param;
+	struct at76_priv *priv = urb->context;
+	struct at76_rx_buffer *buf;
+	struct ieee80211_rx_status rx_status = { 0 };
+
+	if (priv->device_unplugged) {
+		at76_dbg(DBG_DEVSTART, "device unplugged");
+		if (urb)
+			at76_dbg(DBG_DEVSTART, "urb status %d", urb->status);
+		return;
+	}
+
+	if (!priv->rx_skb || !priv->rx_skb->data)
+		return;
+
+	buf = (struct at76_rx_buffer *)priv->rx_skb->data;
+
+	if (urb->status != 0) {
+		if (urb->status != -ENOENT && urb->status != -ECONNRESET)
+			at76_dbg(DBG_URB,
+				 "%s %s: - nonzero Rx bulk status received: %d",
+				 __func__, wiphy_name(priv->hw->wiphy),
+				 urb->status);
+		return;
+	}
+
+	at76_dbg(DBG_RX_ATMEL_HDR,
+		 "%s: rx frame: rate %d rssi %d noise %d link %d",
+		 wiphy_name(priv->hw->wiphy), buf->rx_rate, buf->rssi,
+		 buf->noise_level, buf->link_quality);
+
+	skb_pull(priv->rx_skb, AT76_RX_HDRLEN);
+	skb_trim(priv->rx_skb, le16_to_cpu(buf->wlength));
+	at76_dbg_dump(DBG_RX_DATA, priv->rx_skb->data,
+		      priv->rx_skb->len, "RX: len=%d", priv->rx_skb->len);
+
+	rx_status.signal = buf->rssi;
+	rx_status.flag |= RX_FLAG_DECRYPTED;
+	rx_status.flag |= RX_FLAG_IV_STRIPPED;
+
+	at76_dbg(DBG_MAC80211, "calling ieee80211_rx_irqsafe(): %d/%d",
+		 priv->rx_skb->len, priv->rx_skb->data_len);
+	ieee80211_rx_irqsafe(priv->hw, priv->rx_skb, &rx_status);
+
+	/* Use a new skb for the next receive */
+	priv->rx_skb = NULL;
+
+	at76_submit_rx_urb(priv);
+}
+
+/* Load firmware into kernel memory and parse it */
+static struct fwentry *at76_load_firmware(struct usb_device *udev,
+					  enum board_type board_type)
+{
+	int ret;
+	char *str;
+	struct at76_fw_header *fwh;
+	struct fwentry *fwe = &firmwares[board_type];
+
+	mutex_lock(&fw_mutex);
+
+	if (fwe->loaded) {
+		at76_dbg(DBG_FW, "re-using previously loaded fw");
+		goto exit;
+	}
+
+	at76_dbg(DBG_FW, "downloading firmware %s", fwe->fwname);
+	ret = request_firmware(&fwe->fw, fwe->fwname, &udev->dev);
+	if (ret < 0) {
+		dev_printk(KERN_ERR, &udev->dev, "firmware %s not found!\n",
+			   fwe->fwname);
+		dev_printk(KERN_ERR, &udev->dev,
+			   "you may need to download the firmware from "
+			   "http://developer.berlios.de/projects/at76c503a/\n");
+		goto exit;
+	}
+
+	at76_dbg(DBG_FW, "got it.");
+	fwh = (struct at76_fw_header *)(fwe->fw->data);
+
+	if (fwe->fw->size <= sizeof(*fwh)) {
+		dev_printk(KERN_ERR, &udev->dev,
+			   "firmware is too short (0x%zx)\n", fwe->fw->size);
+		goto exit;
+	}
+
+	/* CRC currently not checked */
+	fwe->board_type = le32_to_cpu(fwh->board_type);
+	if (fwe->board_type != board_type) {
+		dev_printk(KERN_ERR, &udev->dev,
+			   "board type mismatch, requested %u, got %u\n",
+			   board_type, fwe->board_type);
+		goto exit;
+	}
+
+	fwe->fw_version.major = fwh->major;
+	fwe->fw_version.minor = fwh->minor;
+	fwe->fw_version.patch = fwh->patch;
+	fwe->fw_version.build = fwh->build;
+
+	str = (char *)fwh + le32_to_cpu(fwh->str_offset);
+	fwe->intfw = (u8 *)fwh + le32_to_cpu(fwh->int_fw_offset);
+	fwe->intfw_size = le32_to_cpu(fwh->int_fw_len);
+	fwe->extfw = (u8 *)fwh + le32_to_cpu(fwh->ext_fw_offset);
+	fwe->extfw_size = le32_to_cpu(fwh->ext_fw_len);
+
+	fwe->loaded = 1;
+
+	dev_printk(KERN_DEBUG, &udev->dev,
+		   "using firmware %s (version %d.%d.%d-%d)\n",
+		   fwe->fwname, fwh->major, fwh->minor, fwh->patch, fwh->build);
+
+	at76_dbg(DBG_DEVSTART, "board %u, int %d:%d, ext %d:%d", board_type,
+		 le32_to_cpu(fwh->int_fw_offset), le32_to_cpu(fwh->int_fw_len),
+		 le32_to_cpu(fwh->ext_fw_offset), le32_to_cpu(fwh->ext_fw_len));
+	at76_dbg(DBG_DEVSTART, "firmware id %s", str);
+
+exit:
+	mutex_unlock(&fw_mutex);
+
+	if (fwe->loaded)
+		return fwe;
+	else
+		return NULL;
+}
+
+static void at76_mac80211_tx_callback(struct urb *urb)
+{
+	struct at76_priv *priv = urb->context;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
+
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		info->flags |= IEEE80211_TX_STAT_ACK;
+		break;
+	case -ENOENT:
+	case -ECONNRESET:
+		/* fail, urb has been unlinked */
+		/* FIXME: add error message */
+		break;
+	default:
+		at76_dbg(DBG_URB, "%s - nonzero tx status received: %d",
+			 __func__, urb->status);
+		break;
+	}
+
+	memset(&info->status, 0, sizeof(info->status));
+
+	ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
+
+	priv->tx_skb = NULL;
+
+	ieee80211_wake_queues(priv->hw);
+}
+
+static int at76_mac80211_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+	struct at76_priv *priv = hw->priv;
+	struct at76_tx_buffer *tx_buffer = priv->bulk_out_buffer;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int padding, submit_len, ret;
+
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+
+	if (priv->tx_urb->status == -EINPROGRESS) {
+		printk(KERN_ERR "%s: %s called while tx urb is pending\n",
+		       wiphy_name(priv->hw->wiphy), __func__);
+		return NETDEV_TX_BUSY;
+	}
+
+	ieee80211_stop_queues(hw);
+
+	at76_ledtrig_tx_activity();	/* tell ledtrigger we send a packet */
+
+	WARN_ON(priv->tx_skb != NULL);
+
+	priv->tx_skb = skb;
+	padding = at76_calc_padding(skb->len);
+	submit_len = AT76_TX_HDRLEN + skb->len + padding;
+
+	/* setup 'Atmel' header */
+	memset(tx_buffer, 0, sizeof(*tx_buffer));
+	tx_buffer->padding = padding;
+	tx_buffer->wlength = cpu_to_le16(skb->len);
+	tx_buffer->tx_rate = ieee80211_get_tx_rate(hw, info)->hw_value;
+	memset(tx_buffer->reserved, 0, sizeof(tx_buffer->reserved));
+	memcpy(tx_buffer->packet, skb->data, skb->len);
+
+	at76_dbg(DBG_TX_DATA, "%s tx: wlen 0x%x pad 0x%x rate %d hdr",
+		 wiphy_name(priv->hw->wiphy), le16_to_cpu(tx_buffer->wlength),
+		 tx_buffer->padding, tx_buffer->tx_rate);
+
+	/* send stuff */
+	at76_dbg_dump(DBG_TX_DATA_CONTENT, tx_buffer, submit_len,
+		      "%s(): tx_buffer %d bytes:", __func__, submit_len);
+	usb_fill_bulk_urb(priv->tx_urb, priv->udev, priv->tx_pipe, tx_buffer,
+			  submit_len, at76_mac80211_tx_callback, priv);
+	ret = usb_submit_urb(priv->tx_urb, GFP_ATOMIC);
+	if (ret) {
+		printk(KERN_ERR "%s: error in tx submit urb: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		if (ret == -EINVAL)
+			printk(KERN_ERR
+			       "%s: -EINVAL: tx urb %p hcpriv %p complete %p\n",
+			       wiphy_name(priv->hw->wiphy), priv->tx_urb,
+			       priv->tx_urb->hcpriv, priv->tx_urb->complete);
+	}
+
+	return 0;
+}
+
+static int at76_mac80211_start(struct ieee80211_hw *hw)
+{
+	struct at76_priv *priv = hw->priv;
+	int ret;
+
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+
+	mutex_lock(&priv->mtx);
+
+	ret = at76_submit_rx_urb(priv);
+	if (ret < 0) {
+		printk(KERN_ERR "%s: open: submit_rx_urb failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		goto error;
+	}
+
+	at76_startup_device(priv);
+
+	at76_start_monitor(priv);
+
+error:
+	mutex_unlock(&priv->mtx);
+
+	return 0;
+}
+
+static void at76_mac80211_stop(struct ieee80211_hw *hw)
+{
+	struct at76_priv *priv = hw->priv;
+
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+
+	mutex_lock(&priv->mtx);
+
+	if (!priv->device_unplugged) {
+		/* We are called by "ifconfig ethX down", not because the
+		 * device is not available anymore. */
+		at76_set_radio(priv, 0);
+
+		/* We unlink rx_urb because at76_open() re-submits it.
+		 * If unplugged, at76_delete_device() takes care of it. */
+		usb_kill_urb(priv->rx_urb);
+	}
+
+	mutex_unlock(&priv->mtx);
+}
+
+static int at76_add_interface(struct ieee80211_hw *hw,
+			      struct ieee80211_if_init_conf *conf)
+{
+	struct at76_priv *priv = hw->priv;
+	int ret = 0;
+
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+
+	mutex_lock(&priv->mtx);
+
+	switch (conf->type) {
+	case NL80211_IFTYPE_STATION:
+		priv->iw_mode = IW_MODE_INFRA;
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+		goto exit;
+	}
+
+exit:
+	mutex_unlock(&priv->mtx);
+
+	return ret;
+}
+
+static void at76_remove_interface(struct ieee80211_hw *hw,
+				  struct ieee80211_if_init_conf *conf)
+{
+	at76_dbg(DBG_MAC80211, "%s()", __func__);
+}
+
+static int at76_join(struct at76_priv *priv)
+{
+	struct at76_req_join join;
+	int ret;
+
+	memset(&join, 0, sizeof(struct at76_req_join));
+	memcpy(join.essid, priv->essid, priv->essid_size);
+	join.essid_size = priv->essid_size;
+	memcpy(join.bssid, priv->bssid, ETH_ALEN);
+	join.bss_type = INFRASTRUCTURE_MODE;
+	join.channel = priv->channel;
+	join.timeout = cpu_to_le16(2000);
+
+	at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
+	ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
+				    sizeof(struct at76_req_join));
+
+	if (ret < 0) {
+		printk(KERN_ERR "%s: at76_set_card_command failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		return 0;
+	}
+
+	ret = at76_wait_completion(priv, CMD_JOIN);
+	at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
+	if (ret != CMD_STATUS_COMPLETE) {
+		printk(KERN_ERR "%s: at76_wait_completion failed: %d\n",
+		       wiphy_name(priv->hw->wiphy), ret);
+		return 0;
+	}
+
+	at76_set_pm_mode(priv);
+
+	return 0;
+}
+
+static void at76_dwork_hw_scan(struct work_struct *work)
+{
+	struct at76_priv *priv = container_of(work, struct at76_priv,
+					      dwork_hw_scan.work);
+	int ret;
+
+	mutex_lock(&priv->mtx);
+
+	ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
+	at76_dbg(DBG_MAC80211, "%s: CMD_SCAN status 0x%02x", __func__, ret);
+
+	/* FIXME: add maximum time for scan to complete */
+
+	if (ret != CMD_STATUS_COMPLETE) {
+		queue_delayed_work(priv->hw->workqueue, &priv->dwork_hw_scan,
+				   SCAN_POLL_INTERVAL);
+		goto exit;
+	}
+
+	ieee80211_scan_completed(priv->hw);
+
+	if (is_valid_ether_addr(priv->bssid))
+		at76_join(priv);
+
+	ieee80211_wake_queues(priv->hw);
+
+exit:
+	mutex_unlock(&priv->mtx);
+}
+
+static int at76_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
+{
+	struct at76_priv *priv = hw->priv;
+	struct at76_req_scan scan;
+	int ret;
+
+	at76_dbg(DBG_MAC80211, "%s():", __func__);
+	at76_dbg_dump(DBG_MAC80211, ssid, len, "ssid %zd bytes:", len);
+
+	mutex_lock(&priv->mtx);
+
+	ieee80211_stop_queues(hw);
+
+	memset(&scan, 0, sizeof(struct at76_req_scan));
+	memset(scan.bssid, 0xFF, ETH_ALEN);
+	scan.scan_type = SCAN_TYPE_ACTIVE;
+	if (priv->essid_size > 0) {
+		memcpy(scan.essid, ssid, len);
+		scan.essid_size = len;
+	}
+	scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
+	scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
+	scan.probe_delay = cpu_to_le16(priv->scan_min_time * 1000);
+	scan.international_scan = 0;
+
+	at76_dbg(DBG_MAC80211, "%s: sending CMD_SCAN", __func__);
+	ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
+
+	if (ret < 0) {
+		err("CMD_SCAN failed: %d", ret);
+		goto exit;
+	}
+
+	queue_delayed_work(priv->hw->workqueue, &priv->dwork_hw_scan,
+			   SCAN_POLL_INTERVAL);
+
+exit:
+	mutex_unlock(&priv->mtx);
+
+	return 0;
+}
+
+static int at76_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct at76_priv *priv = hw->priv;
+
+	at76_dbg(DBG_MAC80211, "%s(): channel %d radio %d",
+		 __func__, hw->conf.channel->hw_value,
+		 hw->conf.radio_enabled);
+	at76_dbg_dump(DBG_MAC80211, priv->bssid, ETH_ALEN, "bssid:");
+
+	mutex_lock(&priv->mtx);
+
+	priv->channel = hw->conf.channel->hw_value;
+
+	if (is_valid_ether_addr(priv->bssid))
+		at76_join(priv);
+	else
+		at76_start_monitor(priv);
+
+	mutex_unlock(&priv->mtx);
+
+	return 0;
+}
+
+static int at76_config_interface(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 struct ieee80211_if_conf *conf)
+{
+	struct at76_priv *priv = hw->priv;
+
+	at76_dbg(DBG_MAC80211, "%s():", __func__);
+	at76_dbg_dump(DBG_MAC80211, conf->bssid, ETH_ALEN, "bssid:");
+
+	mutex_lock(&priv->mtx);
+
+	memcpy(priv->bssid, conf->bssid, ETH_ALEN);
+
+	if (is_valid_ether_addr(priv->bssid))
+		/* mac80211 is joining a bss */
+		at76_join(priv);
+
+	mutex_unlock(&priv->mtx);
+
+	return 0;
+}
+
+/* must be atomic */
+static void at76_configure_filter(struct ieee80211_hw *hw,
+				  unsigned int changed_flags,
+				  unsigned int *total_flags, int mc_count,
+				  struct dev_addr_list *mc_list)
+{
+	struct at76_priv *priv = hw->priv;
+	int flags;
+
+	at76_dbg(DBG_MAC80211, "%s(): changed_flags=0x%08x "
+		 "total_flags=0x%08x mc_count=%d",
+		 __func__, changed_flags, *total_flags, mc_count);
+
+	flags = changed_flags & AT76_SUPPORTED_FILTERS;
+	*total_flags = AT76_SUPPORTED_FILTERS;
+
+	/* FIXME: access to priv->promisc should be protected with
+	 * priv->mtx, but it's impossible because this function needs to be
+	 * atomic */
+
+	if (flags && !priv->promisc) {
+		/* mac80211 wants us to enable promiscuous mode */
+		priv->promisc = 1;
+	} else if (!flags && priv->promisc) {
+		/* we need to disable promiscuous mode */
+		priv->promisc = 0;
+	} else
+		return;
+
+	queue_work(hw->workqueue, &priv->work_set_promisc);
+}
+
+static int at76_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+			struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+			struct ieee80211_key_conf *key)
+{
+	struct at76_priv *priv = hw->priv;
+
+	int i;
+
+	at76_dbg(DBG_MAC80211, "%s(): cmd %d key->alg %d key->keyidx %d "
+		 "key->keylen %d",
+		 __func__, cmd, key->alg, key->keyidx, key->keylen);
+
+	if (key->alg != ALG_WEP)
+		return -EOPNOTSUPP;
+
+	key->hw_key_idx = key->keyidx;
+
+	mutex_lock(&priv->mtx);
+
+	switch (cmd) {
+	case SET_KEY:
+		memcpy(priv->wep_keys[key->keyidx], key->key, key->keylen);
+		priv->wep_keys_len[key->keyidx] = key->keylen;
+
+		/* FIXME: find out how to do this properly */
+		priv->wep_key_id = key->keyidx;
+
+		break;
+	case DISABLE_KEY:
+	default:
+		priv->wep_keys_len[key->keyidx] = 0;
+		break;
+	}
+
+	priv->wep_enabled = 0;
+
+	for (i = 0; i < WEP_KEYS; i++) {
+		if (priv->wep_keys_len[i] != 0)
+			priv->wep_enabled = 1;
+	}
+
+	at76_startup_device(priv);
+
+	mutex_unlock(&priv->mtx);
+
+	return 0;
+}
+
+static const struct ieee80211_ops at76_ops = {
+	.tx = at76_mac80211_tx,
+	.add_interface = at76_add_interface,
+	.remove_interface = at76_remove_interface,
+	.config = at76_config,
+	.config_interface = at76_config_interface,
+	.configure_filter = at76_configure_filter,
+	.start = at76_mac80211_start,
+	.stop = at76_mac80211_stop,
+	.hw_scan = at76_hw_scan,
+	.set_key = at76_set_key,
+};
+
+/* Allocate network device and initialize private data */
+static struct at76_priv *at76_alloc_new_device(struct usb_device *udev)
+{
+	struct ieee80211_hw *hw;
+	struct at76_priv *priv;
+
+	hw = ieee80211_alloc_hw(sizeof(struct at76_priv), &at76_ops);
+	if (!hw) {
+		printk(KERN_ERR DRIVER_NAME ": could not register"
+		       " ieee80211_hw\n");
+		return NULL;
+	}
+
+	priv = hw->priv;
+	priv->hw = hw;
+
+	priv->udev = udev;
+
+	mutex_init(&priv->mtx);
+	INIT_WORK(&priv->work_set_promisc, at76_work_set_promisc);
+	INIT_WORK(&priv->work_submit_rx, at76_work_submit_rx);
+	INIT_DELAYED_WORK(&priv->dwork_hw_scan, at76_dwork_hw_scan);
+
+	priv->rx_tasklet.func = at76_rx_tasklet;
+	priv->rx_tasklet.data = 0;
+
+	priv->pm_mode = AT76_PM_OFF;
+	priv->pm_period = 0;
+
+	/* unit us */
+	priv->hw->channel_change_time = 100000;
+
+	return priv;
+}
+
+static int at76_alloc_urbs(struct at76_priv *priv,
+			   struct usb_interface *interface)
+{
+	struct usb_endpoint_descriptor *endpoint, *ep_in, *ep_out;
+	int i;
+	int buffer_size;
+	struct usb_host_interface *iface_desc;
+
+	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
+
+	at76_dbg(DBG_URB, "%s: NumEndpoints %d ", __func__,
+		 interface->altsetting[0].desc.bNumEndpoints);
+
+	ep_in = NULL;
+	ep_out = NULL;
+	iface_desc = interface->cur_altsetting;
+	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
+		endpoint = &iface_desc->endpoint[i].desc;
+
+		at76_dbg(DBG_URB, "%s: %d. endpoint: addr 0x%x attr 0x%x",
+			 __func__, i, endpoint->bEndpointAddress,
+			 endpoint->bmAttributes);
+
+		if (!ep_in && usb_endpoint_is_bulk_in(endpoint))
+			ep_in = endpoint;
+
+		if (!ep_out && usb_endpoint_is_bulk_out(endpoint))
+			ep_out = endpoint;
+	}
+
+	if (!ep_in || !ep_out) {
+		dev_printk(KERN_ERR, &interface->dev,
+			   "bulk endpoints missing\n");
+		return -ENXIO;
+	}
+
+	priv->rx_pipe = usb_rcvbulkpipe(priv->udev, ep_in->bEndpointAddress);
+	priv->tx_pipe = usb_sndbulkpipe(priv->udev, ep_out->bEndpointAddress);
+
+	priv->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	priv->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!priv->rx_urb || !priv->tx_urb) {
+		dev_printk(KERN_ERR, &interface->dev, "cannot allocate URB\n");
+		return -ENOMEM;
+	}
+
+	buffer_size = sizeof(struct at76_tx_buffer) + MAX_PADDING_SIZE;
+	priv->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
+	if (!priv->bulk_out_buffer) {
+		dev_printk(KERN_ERR, &interface->dev,
+			   "cannot allocate output buffer\n");
+		return -ENOMEM;
+	}
+
+	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
+
+	return 0;
+}
+
+static struct ieee80211_rate at76_rates[] = {
+	{ .bitrate = 10, .hw_value = TX_RATE_1MBIT, },
+	{ .bitrate = 20, .hw_value = TX_RATE_2MBIT, },
+	{ .bitrate = 55, .hw_value = TX_RATE_5_5MBIT, },
+	{ .bitrate = 110, .hw_value = TX_RATE_11MBIT, },
+};
+
+static struct ieee80211_channel at76_channels[] = {
+	{ .center_freq = 2412, .hw_value = 1 },
+	{ .center_freq = 2417, .hw_value = 2 },
+	{ .center_freq = 2422, .hw_value = 3 },
+	{ .center_freq = 2427, .hw_value = 4 },
+	{ .center_freq = 2432, .hw_value = 5 },
+	{ .center_freq = 2437, .hw_value = 6 },
+	{ .center_freq = 2442, .hw_value = 7 },
+	{ .center_freq = 2447, .hw_value = 8 },
+	{ .center_freq = 2452, .hw_value = 9 },
+	{ .center_freq = 2457, .hw_value = 10 },
+	{ .center_freq = 2462, .hw_value = 11 },
+	{ .center_freq = 2467, .hw_value = 12 },
+	{ .center_freq = 2472, .hw_value = 13 },
+	{ .center_freq = 2484, .hw_value = 14 }
+};
+
+static struct ieee80211_supported_band at76_supported_band = {
+	.channels = at76_channels,
+	.n_channels = ARRAY_SIZE(at76_channels),
+	.bitrates = at76_rates,
+	.n_bitrates = ARRAY_SIZE(at76_rates),
+};
+
+/* Register network device and initialize the hardware */
+static int at76_init_new_device(struct at76_priv *priv,
+				struct usb_interface *interface)
+{
+	int ret;
+
+	/* set up the endpoint information */
+	/* check out the endpoints */
+
+	at76_dbg(DBG_DEVSTART, "USB interface: %d endpoints",
+		 interface->cur_altsetting->desc.bNumEndpoints);
+
+	ret = at76_alloc_urbs(priv, interface);
+	if (ret < 0)
+		goto exit;
+
+	/* MAC address */
+	ret = at76_get_hw_config(priv);
+	if (ret < 0) {
+		dev_printk(KERN_ERR, &interface->dev,
+			   "cannot get MAC address\n");
+		goto exit;
+	}
+
+	priv->domain = at76_get_reg_domain(priv->regulatory_domain);
+
+	priv->channel = DEF_CHANNEL;
+	priv->iw_mode = IW_MODE_INFRA;
+	priv->rts_threshold = DEF_RTS_THRESHOLD;
+	priv->frag_threshold = DEF_FRAG_THRESHOLD;
+	priv->short_retry_limit = DEF_SHORT_RETRY_LIMIT;
+	priv->txrate = TX_RATE_AUTO;
+	priv->preamble_type = PREAMBLE_TYPE_LONG;
+	priv->beacon_period = 100;
+	priv->auth_mode = WLAN_AUTH_OPEN;
+	priv->scan_min_time = DEF_SCAN_MIN_TIME;
+	priv->scan_max_time = DEF_SCAN_MAX_TIME;
+	priv->scan_mode = SCAN_TYPE_ACTIVE;
+
+	/* mac80211 initialisation */
+	priv->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+	priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &at76_supported_band;
+	priv->hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+			  IEEE80211_HW_SIGNAL_UNSPEC;
+
+	SET_IEEE80211_DEV(priv->hw, &interface->dev);
+	SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
+
+	ret = ieee80211_register_hw(priv->hw);
+	if (ret) {
+		printk(KERN_ERR "cannot register mac80211 hw (status %d)!\n",
+		       ret);
+		goto exit;
+	}
+
+	priv->mac80211_registered = 1;
+
+	printk(KERN_INFO "%s: USB %s, MAC %s, firmware %d.%d.%d-%d\n",
+	       wiphy_name(priv->hw->wiphy),
+	       interface->dev.bus_id, mac2str(priv->mac_addr),
+	       priv->fw_version.major, priv->fw_version.minor,
+	       priv->fw_version.patch, priv->fw_version.build);
+	printk(KERN_INFO "%s: regulatory domain 0x%02x: %s\n",
+	       wiphy_name(priv->hw->wiphy),
+	       priv->regulatory_domain, priv->domain->name);
+
+exit:
+	return ret;
+}
+
+static void at76_delete_device(struct at76_priv *priv)
+{
+	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
+
+	/* The device is gone, don't bother turning it off */
+	priv->device_unplugged = 1;
+
+	if (priv->mac80211_registered)
+		ieee80211_unregister_hw(priv->hw);
+
+	/* assuming we used keventd, it must quiesce too */
+	flush_scheduled_work();
+
+	kfree(priv->bulk_out_buffer);
+
+	if (priv->tx_urb) {
+		usb_kill_urb(priv->tx_urb);
+		usb_free_urb(priv->tx_urb);
+	}
+	if (priv->rx_urb) {
+		usb_kill_urb(priv->rx_urb);
+		usb_free_urb(priv->rx_urb);
+	}
+
+	at76_dbg(DBG_PROC_ENTRY, "%s: unlinked urbs", __func__);
+
+	if (priv->rx_skb)
+		kfree_skb(priv->rx_skb);
+
+	usb_put_dev(priv->udev);
+
+	at76_dbg(DBG_PROC_ENTRY, "%s: before freeing priv/ieee80211_hw",
+		 __func__);
+	ieee80211_free_hw(priv->hw);
+
+	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
+}
+
+static int at76_probe(struct usb_interface *interface,
+		      const struct usb_device_id *id)
+{
+	int ret;
+	struct at76_priv *priv;
+	struct fwentry *fwe;
+	struct usb_device *udev;
+	int op_mode;
+	int need_ext_fw = 0;
+	struct mib_fw_version fwv;
+	int board_type = (int)id->driver_info;
+
+	udev = usb_get_dev(interface_to_usbdev(interface));
+
+	/* Load firmware into kernel memory */
+	fwe = at76_load_firmware(udev, board_type);
+	if (!fwe) {
+		ret = -ENOENT;
+		goto error;
+	}
+
+	op_mode = at76_get_op_mode(udev);
+
+	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
+
+	/* we get OPMODE_NONE with 2.4.23, SMC2662W-AR ???
+	   we get 204 with 2.4.23, Fiberline FL-WL240u (505A+RFMD2958) ??? */
+
+	if (op_mode == OPMODE_HW_CONFIG_MODE) {
+		dev_printk(KERN_ERR, &interface->dev,
+			   "cannot handle a device in HW_CONFIG_MODE\n");
+		ret = -EBUSY;
+		goto error;
+	}
+
+	if (op_mode != OPMODE_NORMAL_NIC_WITH_FLASH
+	    && op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
+		/* download internal firmware part */
+		dev_printk(KERN_DEBUG, &interface->dev,
+			   "downloading internal firmware\n");
+		ret = at76_load_internal_fw(udev, fwe);
+		if (ret < 0) {
+			dev_printk(KERN_ERR, &interface->dev,
+				   "error %d downloading internal firmware\n",
+				   ret);
+			goto error;
+		}
+		usb_put_dev(udev);
+		return ret;
+	}
+
+	/* Internal firmware already inside the device.  Get firmware
+	 * version to test if external firmware is loaded.
+	 * This works only for newer firmware, e.g. the Intersil 0.90.x
+	 * says "control timeout on ep0in" and subsequent
+	 * at76_get_op_mode() fail too :-( */
+
+	/* if version >= 0.100.x.y or device with built-in flash we can
+	 * query the device for the fw version */
+	if ((fwe->fw_version.major > 0 || fwe->fw_version.minor >= 100)
+	    || (op_mode == OPMODE_NORMAL_NIC_WITH_FLASH)) {
+		ret = at76_get_mib(udev, MIB_FW_VERSION, &fwv, sizeof(fwv));
+		if (ret < 0 || (fwv.major | fwv.minor) == 0)
+			need_ext_fw = 1;
+	} else
+		/* No way to check firmware version, reload to be sure */
+		need_ext_fw = 1;
+
+	if (need_ext_fw) {
+		dev_printk(KERN_DEBUG, &interface->dev,
+			   "downloading external firmware\n");
+
+		ret = at76_load_external_fw(udev, fwe);
+		if (ret)
+			goto error;
+
+		/* Re-check firmware version */
+		ret = at76_get_mib(udev, MIB_FW_VERSION, &fwv, sizeof(fwv));
+		if (ret < 0) {
+			dev_printk(KERN_ERR, &interface->dev,
+				   "error %d getting firmware version\n", ret);
+			goto error;
+		}
+	}
+
+	priv = at76_alloc_new_device(udev);
+	if (!priv) {
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	usb_set_intfdata(interface, priv);
+
+	memcpy(&priv->fw_version, &fwv, sizeof(struct mib_fw_version));
+	priv->board_type = board_type;
+
+	ret = at76_init_new_device(priv, interface);
+	if (ret < 0)
+		at76_delete_device(priv);
+
+	return ret;
+
+error:
+	usb_put_dev(udev);
+	return ret;
+}
+
+static void at76_disconnect(struct usb_interface *interface)
+{
+	struct at76_priv *priv;
+
+	priv = usb_get_intfdata(interface);
+	usb_set_intfdata(interface, NULL);
+
+	/* Disconnect after loading internal firmware */
+	if (!priv)
+		return;
+
+	printk(KERN_INFO "%s: disconnecting\n", wiphy_name(priv->hw->wiphy));
+	at76_delete_device(priv);
+	dev_printk(KERN_INFO, &interface->dev, "disconnected\n");
+}
+
+/* Structure for registering this driver with the USB subsystem */
+static struct usb_driver at76_driver = {
+	.name = DRIVER_NAME,
+	.probe = at76_probe,
+	.disconnect = at76_disconnect,
+	.id_table = dev_table,
+};
+
+static int __init at76_mod_init(void)
+{
+	int result;
+
+	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " loading\n");
+
+	mutex_init(&fw_mutex);
+
+	/* register this driver with the USB subsystem */
+	result = usb_register(&at76_driver);
+	if (result < 0)
+		printk(KERN_ERR DRIVER_NAME
+		       ": usb_register failed (status %d)\n", result);
+
+	led_trigger_register_simple("at76_usb-tx", &ledtrig_tx);
+	return result;
+}
+
+static void __exit at76_mod_exit(void)
+{
+	int i;
+
+	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " unloading\n");
+	usb_deregister(&at76_driver);
+	for (i = 0; i < ARRAY_SIZE(firmwares); i++) {
+		if (firmwares[i].fw)
+			release_firmware(firmwares[i].fw);
+	}
+	led_trigger_unregister_simple(ledtrig_tx);
+}
+
+module_param_named(debug, at76_debug, int, 0600);
+MODULE_PARM_DESC(debug, "Debugging level");
+
+module_init(at76_mod_init);
+module_exit(at76_mod_exit);
+
+MODULE_AUTHOR("Oliver Kurth <oku@masqmail.cx>");
+MODULE_AUTHOR("Joerg Albert <joerg.albert@gmx.de>");
+MODULE_AUTHOR("Alex <alex@foogod.com>");
+MODULE_AUTHOR("Nick Jones");
+MODULE_AUTHOR("Balint Seeber <n0_5p4m_p13453@hotmail.com>");
+MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
+MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
+MODULE_AUTHOR("Kalle Valo <kalle.valo@iki.fi>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");