Add rt2x00-mac80211 snapshot (#1916)

SVN-Revision: 8184

1 files changed, 1896 insertions, 0 deletions

diff --git a/package/rt2x00/src/rt73usb.c b/package/rt2x00/src/rt73usb.c
new file mode 100644
index 0000000..04261fa
--- /dev/null
+++ b/package/rt2x00/src/rt73usb.c
@@ -0,0 +1,1896 @@
+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	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 program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the
+	Free Software Foundation, Inc.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt73usb
+	Abstract: rt73usb device specific routines.
+	Supported chipsets: rt2571W & rt2671.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt73usb"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+
+#include "rt2x00.h"
+#include "rt2x00usb.h"
+#include "rt73usb.h"
+
+/*
+ * Register access.
+ * All access to the CSR registers will go through the methods
+ * rt73usb_register_read and rt73usb_register_write.
+ * BBP and RF register require indirect register access,
+ * and use the CSR registers BBPCSR and RFCSR to achieve this.
+ * These indirect registers work with busy bits,
+ * and we will try maximal REGISTER_BUSY_COUNT times to access
+ * the register while taking a REGISTER_BUSY_DELAY us delay
+ * between each attampt. When the busy bit is still set at that time,
+ * the access attempt is considered to have failed,
+ * and we will print an error.
+ */
+static inline void rt73usb_register_read(
+	const struct rt2x00_dev *rt2x00dev,
+	const u16 offset, u32 *value)
+{
+	__le32 reg;
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_MULTI_READ, USB_VENDOR_REQUEST_IN,
+		offset, 0x00, &reg, sizeof(u32), REGISTER_TIMEOUT);
+	*value = le32_to_cpu(reg);
+}
+
+static inline void rt73usb_register_multiread(
+	const struct rt2x00_dev *rt2x00dev,
+	const u16 offset, void *value, const u32 length)
+{
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_MULTI_READ, USB_VENDOR_REQUEST_IN,
+		offset, 0x00, value, length,
+		REGISTER_TIMEOUT * (length / sizeof(u32)));
+}
+
+static inline void rt73usb_register_write(
+	const struct rt2x00_dev *rt2x00dev,
+	const u16 offset, u32 value)
+{
+	__le32 reg = cpu_to_le32(value);
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_MULTI_WRITE, USB_VENDOR_REQUEST_OUT,
+		offset, 0x00, &reg, sizeof(u32), REGISTER_TIMEOUT);
+}
+
+static inline void rt73usb_register_multiwrite(
+	const struct rt2x00_dev *rt2x00dev,
+	const u16 offset, void *value, const u32 length)
+{
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_MULTI_WRITE, USB_VENDOR_REQUEST_OUT,
+		offset, 0x00, value, length,
+		REGISTER_TIMEOUT * (length / sizeof(u32)));
+}
+
+static u32 rt73usb_bbp_check(const struct rt2x00_dev *rt2x00dev)
+{
+	u32 reg;
+	unsigned int i;
+
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		rt73usb_register_read(rt2x00dev, PHY_CSR3, &reg);
+		if (!rt2x00_get_field32(reg, PHY_CSR3_BUSY))
+			break;
+		udelay(REGISTER_BUSY_DELAY);
+	}
+
+	return reg;
+}
+
+static void rt73usb_bbp_write(const struct rt2x00_dev *rt2x00dev,
+	const u8 reg_id, const u8 value)
+{
+	u32 reg;
+
+	/*
+	 *  Wait until the BBP becomes ready.
+	 */
+	reg = rt73usb_bbp_check(rt2x00dev);
+	if (rt2x00_get_field32(reg, PHY_CSR3_BUSY)) {
+		ERROR(rt2x00dev, "PHY_CSR3 register busy. Write failed.\n");
+		return;
+	}
+
+	/*
+	 * Write the data into the BBP.
+	 */
+	reg = 0;
+	rt2x00_set_field32(&reg, PHY_CSR3_VALUE, value);
+	rt2x00_set_field32(&reg, PHY_CSR3_REGNUM, reg_id);
+	rt2x00_set_field32(&reg, PHY_CSR3_BUSY, 1);
+	rt2x00_set_field32(&reg, PHY_CSR3_READ_CONTROL, 0);
+
+	rt73usb_register_write(rt2x00dev, PHY_CSR3, reg);
+}
+
+static void rt73usb_bbp_read(const struct rt2x00_dev *rt2x00dev,
+	const u8 reg_id, u8 *value)
+{
+	u32 reg;
+
+	/*
+	 *  Wait until the BBP becomes ready.
+	 */
+	reg = rt73usb_bbp_check(rt2x00dev);
+	if (rt2x00_get_field32(reg, PHY_CSR3_BUSY)) {
+		ERROR(rt2x00dev, "PHY_CSR3 register busy. Read failed.\n");
+		return;
+	}
+
+	/*
+	 * Write the request into the BBP.
+	 */
+	reg =0;
+	rt2x00_set_field32(&reg, PHY_CSR3_REGNUM, reg_id);
+	rt2x00_set_field32(&reg, PHY_CSR3_BUSY, 1);
+	rt2x00_set_field32(&reg, PHY_CSR3_READ_CONTROL, 1);
+
+	rt73usb_register_write(rt2x00dev, PHY_CSR3, reg);
+
+	/*
+	 *  Wait until the BBP becomes ready.
+	 */
+	reg = rt73usb_bbp_check(rt2x00dev);
+	if (rt2x00_get_field32(reg, PHY_CSR3_BUSY)) {
+		ERROR(rt2x00dev, "PHY_CSR3 register busy. Read failed.\n");
+		*value = 0xff;
+		return;
+	}
+
+	*value = rt2x00_get_field32(reg, PHY_CSR3_VALUE);
+}
+
+static void rt73usb_rf_write(const struct rt2x00_dev *rt2x00dev,
+	const u32 value)
+{
+	u32 reg;
+	unsigned int i;
+
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		rt73usb_register_read(rt2x00dev, PHY_CSR4, &reg);
+		if (!rt2x00_get_field32(reg, PHY_CSR4_BUSY))
+			goto rf_write;
+		udelay(REGISTER_BUSY_DELAY);
+	}
+
+	ERROR(rt2x00dev, "PHY_CSR4 register busy. Write failed.\n");
+	return;
+
+rf_write:
+	reg = 0;
+	rt2x00_set_field32(&reg, PHY_CSR4_VALUE, value);
+	rt2x00_set_field32(&reg, PHY_CSR4_NUMBER_OF_BITS, 20);
+	rt2x00_set_field32(&reg, PHY_CSR4_IF_SELECT, 0);
+	rt2x00_set_field32(&reg, PHY_CSR4_BUSY, 1);
+
+	rt73usb_register_write(rt2x00dev, PHY_CSR4, reg);
+}
+
+#ifdef CONFIG_RT2X00_LIB_DEBUGFS
+#define CSR_OFFSET(__word)	( CSR_REG_BASE + ((__word) * sizeof(u32)) )
+
+static void rt73usb_read_csr(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt73usb_register_read(rt2x00dev, CSR_OFFSET(word), data);
+}
+
+static void rt73usb_write_csr(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt73usb_register_write(rt2x00dev, CSR_OFFSET(word), *((u32*)data));
+}
+
+static void rt73usb_read_eeprom(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt2x00_eeprom_read(rt2x00dev, word, data);
+}
+
+static void rt73usb_write_eeprom(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt2x00_eeprom_write(rt2x00dev, word, *((u16*)data));
+}
+
+static void rt73usb_read_bbp(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt73usb_bbp_read(rt2x00dev, word, data);
+}
+
+static void rt73usb_write_bbp(struct rt2x00_dev *rt2x00dev,
+	const unsigned long word, void *data)
+{
+	rt73usb_bbp_write(rt2x00dev, word, *((u8*)data));
+}
+
+static const struct rt2x00debug rt73usb_rt2x00debug = {
+	.owner 		= THIS_MODULE,
+	.reg_csr	= {
+		.read		= rt73usb_read_csr,
+		.write		= rt73usb_write_csr,
+		.word_size	= sizeof(u32),
+		.word_count	= CSR_REG_SIZE / sizeof(u32),
+	},
+	.reg_eeprom	= {
+		.read		= rt73usb_read_eeprom,
+		.write		= rt73usb_write_eeprom,
+		.word_size	= sizeof(u16),
+		.word_count	= EEPROM_SIZE / sizeof(u16),
+	},
+	.reg_bbp	= {
+		.read		= rt73usb_read_bbp,
+		.write		= rt73usb_write_bbp,
+		.word_size	= sizeof(u8),
+		.word_count	= BBP_SIZE / sizeof(u8),
+	},
+};
+#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
+
+/*
+ * Configuration handlers.
+ */
+static void rt73usb_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+{
+	u32 reg[2];
+
+	memset(&reg, 0, sizeof(reg));
+	memcpy(&reg, bssid, ETH_ALEN);
+
+	rt2x00_set_field32(&reg[1], MAC_CSR5_BSS_ID_MASK, 3);
+
+	/*
+	 * The BSSID is passed to us as an array of bytes,
+	 * that array is little endian, so no need for byte ordering.
+	 */
+	rt73usb_register_multiwrite(rt2x00dev, MAC_CSR4, &reg, sizeof(reg));
+}
+
+static void rt73usb_config_promisc(struct rt2x00_dev *rt2x00dev,
+	const int promisc)
+{
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR0_DROP_NOT_TO_ME, !promisc);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+}
+
+static void rt73usb_config_type(struct rt2x00_dev *rt2x00dev,
+	const int type)
+{
+	u32 reg;
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR9, 0);
+
+	/*
+	 * Apply hardware packet filter.
+	 */
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+
+	if (!is_monitor_present(&rt2x00dev->interface) &&
+	    (type == IEEE80211_IF_TYPE_IBSS || type == IEEE80211_IF_TYPE_STA))
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_TO_DS, 1);
+	else
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_TO_DS, 0);
+
+	rt2x00_set_field32(&reg, TXRX_CSR0_DROP_CRC, 1);
+	if (is_monitor_present(&rt2x00dev->interface)) {
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_PHYSICAL, 0);
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_CONTROL, 0);
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_VERSION_ERROR, 0);
+	} else {
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_PHYSICAL, 1);
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_CONTROL, 1);
+		rt2x00_set_field32(&reg, TXRX_CSR0_DROP_VERSION_ERROR, 1);
+	}
+
+	rt2x00_set_field32(&reg, TXRX_CSR0_DROP_MULTICAST, 0);
+	rt2x00_set_field32(&reg, TXRX_CSR0_DROP_BORADCAST, 0);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+
+	/*
+	 * Enable synchronisation.
+	 */
+	rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
+	if (is_interface_present(&rt2x00dev->interface)) {
+		rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 1);
+		rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 1);
+	}
+
+	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 0);
+	if (type == IEEE80211_IF_TYPE_IBSS || type == IEEE80211_IF_TYPE_AP)
+		rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, 2);
+	else if (type == IEEE80211_IF_TYPE_STA)
+		rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, 1);
+	else if (is_monitor_present(&rt2x00dev->interface) &&
+		 !is_interface_present(&rt2x00dev->interface))
+		rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, 0);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
+}
+
+static void rt73usb_config_channel(struct rt2x00_dev *rt2x00dev,
+	const int value, const int channel, const int txpower)
+{
+	u8 reg = 0;
+	u32 rf1 = rt2x00dev->rf1;
+	u32 rf2 = value;
+	u32 rf3 = rt2x00dev->rf3;
+	u32 rf4 = 0;
+
+	if (rt2x00_rf(&rt2x00dev->chip, RF5225) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF2527))
+		rf2 |= 0x00004000;
+
+	if (rt2x00_rf(&rt2x00dev->chip, RF5225)) {
+		if (channel <= 14)
+			rf3 = 0x00068455;
+		else if (channel >= 36 && channel <= 48)
+			rf3 = 0x0009be55;
+		else if (channel >= 52 && channel <= 64)
+			rf3 = 0x0009ae55;
+		else if (channel >= 100 && channel <= 112)
+			rf3 = 0x000bae55;
+		else
+			rf3 = 0x000bbe55;
+	}
+
+	if (channel < 14) {
+		if (channel & 0x01)
+			rf4 = 0x000fea0b;
+		else
+			rf4 = 0x000fea1f;
+	} else if (channel == 14) {
+		rf4 = 0x000fea13;
+	} else {
+		switch (channel) {
+			case 36:
+			case 56:
+			case 116:
+			case 136:
+				rf4 = 0x000fea23;
+				break;
+			case 40:
+			case 60:
+			case 100:
+			case 120:
+			case 140:
+				rf4 = 0x000fea03;
+				break;
+			case 44:
+			case 64:
+			case 104:
+			case 124:
+				rf4 = 0x000fea0b;
+				break;
+			case 48:
+			case 108:
+			case 128:
+				rf4 = 0x000fea13;
+				break;
+			case 52:
+			case 112:
+			case 132:
+				rf4 = 0x000fea1b;
+				break;
+			case 149:
+				rf4 = 0x000fea1f;
+				break;
+			case 153:
+				rf4 = 0x000fea27;
+				break;
+			case 157:
+				rf4 = 0x000fea07;
+				break;
+			case 161:
+				rf4 = 0x000fea0f;
+				break;
+			case 165:
+				rf4 = 0x000fea17;
+				break;
+		}
+	}
+
+	if (rt2x00_rf(&rt2x00dev->chip, RF2527) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF5225))
+		rf4 |= 0x00010000;
+
+	/*
+	 * Set TXpower.
+	 */
+	rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
+
+	/*
+	 * Set Frequency offset.
+	 */
+	rt2x00_set_field32(&rf4, RF4_FREQ_OFFSET, rt2x00dev->freq_offset);
+
+	rt73usb_bbp_read(rt2x00dev, 3, &reg);
+	if (rt2x00_rf(&rt2x00dev->chip, RF5225) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF2527))
+		reg &= ~0x01;
+	else
+		reg |= 0x01;
+	rt73usb_bbp_write(rt2x00dev, 3, reg);
+
+	rt73usb_rf_write(rt2x00dev, rf1);
+	rt73usb_rf_write(rt2x00dev, rf2);
+	rt73usb_rf_write(rt2x00dev, rf3 & ~0x00000004);
+	rt73usb_rf_write(rt2x00dev, rf4);
+
+	rt73usb_rf_write(rt2x00dev, rf1);
+	rt73usb_rf_write(rt2x00dev, rf2);
+	rt73usb_rf_write(rt2x00dev, rf3 | 0x00000004);
+	rt73usb_rf_write(rt2x00dev, rf4);
+
+	rt73usb_rf_write(rt2x00dev, rf1);
+	rt73usb_rf_write(rt2x00dev, rf2);
+	rt73usb_rf_write(rt2x00dev, rf3 & ~0x00000004);
+	rt73usb_rf_write(rt2x00dev, rf4);
+
+	msleep(1);
+
+	/*
+	 * Update rf fields
+	 */
+	rt2x00dev->rf1 = rf1;
+	rt2x00dev->rf2 = rf2;
+	rt2x00dev->rf3 = rf3;
+	rt2x00dev->rf4 = rf4;
+	rt2x00dev->tx_power = txpower;
+}
+
+static void rt73usb_config_txpower(struct rt2x00_dev *rt2x00dev,
+	const int txpower)
+{
+	rt2x00_set_field32(&rt2x00dev->rf3, RF3_TXPOWER,
+		TXPOWER_TO_DEV(txpower));
+
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf1);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf2);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf3 & ~0x00000004);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf4);
+
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf1);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf2);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf3 | 0x00000004);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf4);
+
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf1);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf2);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf3 & ~0x00000004);
+	rt73usb_rf_write(rt2x00dev, rt2x00dev->rf4);
+}
+
+static void rt73usb_config_antenna(struct rt2x00_dev *rt2x00dev,
+	const int antenna_tx, const int antenna_rx)
+{
+	u32 reg;
+	u8 r3;
+	u8 r4;
+	u8 r77;
+
+	rt73usb_register_read(rt2x00dev, PHY_CSR0, &reg);
+
+	if (rt2x00dev->curr_hwmode == HWMODE_A) {
+		if (test_bit(CONFIG_EXTERNAL_LNA, &rt2x00dev->flags)) {
+			rt73usb_bbp_write(rt2x00dev, 17, 0x38);
+			rt73usb_bbp_write(rt2x00dev, 96, 0x78);
+			rt73usb_bbp_write(rt2x00dev, 104, 0x48);
+			rt73usb_bbp_write(rt2x00dev, 75, 0x80);
+			rt73usb_bbp_write(rt2x00dev, 86, 0x80);
+			rt73usb_bbp_write(rt2x00dev, 88, 0x80);
+		} else {
+			rt73usb_bbp_write(rt2x00dev, 17, 0x28);
+			rt73usb_bbp_write(rt2x00dev, 96, 0x58);
+			rt73usb_bbp_write(rt2x00dev, 104, 0x38);
+			rt73usb_bbp_write(rt2x00dev, 75, 0xfe);
+			rt73usb_bbp_write(rt2x00dev, 86, 0xfe);
+			rt73usb_bbp_write(rt2x00dev, 88, 0xfe);
+		}
+		rt73usb_bbp_write(rt2x00dev, 35, 0x60);
+		rt73usb_bbp_write(rt2x00dev, 97, 0x58);
+		rt73usb_bbp_write(rt2x00dev, 98, 0x58);
+
+		rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_BG, 0);
+		rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_A, 1);
+	} else {
+		if (test_bit(CONFIG_EXTERNAL_LNA, &rt2x00dev->flags)) {
+			rt73usb_bbp_write(rt2x00dev, 17, 0x30);
+			rt73usb_bbp_write(rt2x00dev, 96, 0x68);
+			rt73usb_bbp_write(rt2x00dev, 104, 0x3c);
+			rt73usb_bbp_write(rt2x00dev, 75, 0x80);
+			rt73usb_bbp_write(rt2x00dev, 86, 0x80);
+			rt73usb_bbp_write(rt2x00dev, 88, 0x80);
+		} else {
+			rt73usb_bbp_write(rt2x00dev, 17, 0x20);
+			rt73usb_bbp_write(rt2x00dev, 96, 0x48);
+			rt73usb_bbp_write(rt2x00dev, 104, 0x2c);
+			rt73usb_bbp_write(rt2x00dev, 75, 0xfe);
+			rt73usb_bbp_write(rt2x00dev, 86, 0xfe);
+			rt73usb_bbp_write(rt2x00dev, 88, 0xfe);
+		}
+		rt73usb_bbp_write(rt2x00dev, 35, 0x50);
+		rt73usb_bbp_write(rt2x00dev, 97, 0x48);
+		rt73usb_bbp_write(rt2x00dev, 98, 0x48);
+
+		rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_BG, 1);
+		rt2x00_set_field32(&reg, PHY_CSR0_PA_PE_A, 0);
+	}
+
+	rt73usb_register_write(rt2x00dev, PHY_CSR0, reg);
+
+	rt73usb_bbp_read(rt2x00dev, 3, &r3);
+	rt73usb_bbp_read(rt2x00dev, 4, &r4);
+	rt73usb_bbp_read(rt2x00dev, 77, &r77);
+
+	rt2x00_set_field8(&r3, BBP_R3_SMART_MODE, 0);
+
+	if (rt2x00_rf(&rt2x00dev->chip, RF5226) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF5225)) {
+		if (antenna_rx == ANTENNA_DIVERSITY) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 2);
+			if (rt2x00dev->curr_hwmode != HWMODE_A)
+				rt2x00_set_field8(&r4, BBP_R4_RX_BG_MODE, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+		} else if (antenna_rx == ANTENNA_A) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+			if (rt2x00dev->curr_hwmode == HWMODE_A)
+				rt2x00_set_field8(&r77, BBP_R77_PAIR, 0);
+			else
+				rt2x00_set_field8(&r77, BBP_R77_PAIR, 3);
+			rt73usb_bbp_write(rt2x00dev, 77, r77);
+		} else if (antenna_rx == ANTENNA_B) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+			if (rt2x00dev->curr_hwmode == HWMODE_A)
+				rt2x00_set_field8(&r77, BBP_R77_PAIR, 3);
+			else
+				rt2x00_set_field8(&r77, BBP_R77_PAIR, 0);
+			rt73usb_bbp_write(rt2x00dev, 77, r77);
+		}
+	} else if (rt2x00_rf(&rt2x00dev->chip, RF2528) ||
+		   rt2x00_rf(&rt2x00dev->chip, RF2527)) {
+		if (antenna_rx == ANTENNA_DIVERSITY) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 2);
+			rt2x00_set_field8(&r4, BBP_R4_RX_BG_MODE, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+		} else if (antenna_rx == ANTENNA_A) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_BG_MODE, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+			rt2x00_set_field8(&r77, BBP_R77_PAIR, 3);
+			rt73usb_bbp_write(rt2x00dev, 77, r77);
+		} else if (antenna_rx == ANTENNA_B) {
+			rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_BG_MODE, 1);
+			rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END,
+				test_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags));
+			rt2x00_set_field8(&r77, BBP_R77_PAIR, 0);
+		}
+	}
+
+	rt73usb_bbp_write(rt2x00dev, 3, r3);
+	rt73usb_bbp_write(rt2x00dev, 4, r4);
+}
+
+static void rt73usb_config_duration(struct rt2x00_dev *rt2x00dev,
+	const int short_slot_time, const int beacon_int)
+{
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR9, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR9_SLOT_TIME,
+		short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt73usb_register_write(rt2x00dev, MAC_CSR9, reg);
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR8, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR8_SIFS, SIFS);
+	rt2x00_set_field32(&reg, MAC_CSR8_SIFS_AFTER_RX_OFDM, 3);
+	rt2x00_set_field32(&reg, MAC_CSR8_EIFS, EIFS);
+	rt73usb_register_write(rt2x00dev, MAC_CSR8, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR0_TSF_OFFSET, IEEE80211_HEADER);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_ENABLE, 1);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_INTERVAL, beacon_int * 16);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
+}
+
+static void rt73usb_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+{
+	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
+	u32 reg;
+	u32 value;
+	u32 preamble;
+
+	preamble = DEVICE_GET_RATE_FIELD(rate, PREAMBLE)
+		? SHORT_PREAMBLE : PREAMBLE;
+
+	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATE;
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR5, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
+		 SHORT_DIFS :  DIFS) +
+		PLCP + preamble + get_duration(ACK_SIZE, 10);
+	rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, value);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
+	if (preamble == SHORT_PREAMBLE)
+		rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_PREAMBLE, 1);
+	else
+		rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_PREAMBLE, 0);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
+}
+
+static void rt73usb_config_phymode(struct rt2x00_dev *rt2x00dev,
+	const int phymode)
+{
+	struct ieee80211_hw_mode *mode;
+	struct ieee80211_rate *rate;
+
+	if (phymode == MODE_IEEE80211A)
+		rt2x00dev->curr_hwmode = HWMODE_A;
+	else if (phymode == MODE_IEEE80211B)
+		rt2x00dev->curr_hwmode = HWMODE_B;
+	else
+		rt2x00dev->curr_hwmode = HWMODE_G;
+
+	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
+	rate = &mode->rates[mode->num_rates - 1];
+
+	rt73usb_config_rate(rt2x00dev, rate->val2);
+}
+
+static void rt73usb_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+{
+	u32 reg[2];
+
+	memset(&reg, 0, sizeof(reg));
+	memcpy(&reg, addr, ETH_ALEN);
+
+	rt2x00_set_field32(&reg[1], MAC_CSR3_UNICAST_TO_ME_MASK, 0xff);
+
+	/*
+	 * The MAC address is passed to us as an array of bytes,
+	 * that array is little endian, so no need for byte ordering.
+	 */
+	rt73usb_register_multiwrite(rt2x00dev, MAC_CSR2, &reg, sizeof(reg));
+}
+
+/*
+ * LED functions.
+ */
+static void rt73usb_enable_led(struct rt2x00_dev *rt2x00dev)
+{
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR14, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR14_ON_PERIOD, 70);
+	rt2x00_set_field32(&reg, MAC_CSR14_OFF_PERIOD, 30);
+	rt73usb_register_write(rt2x00dev, MAC_CSR14, reg);
+
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_RADIO_STATUS, 1);
+	if (rt2x00dev->rx_status.phymode == MODE_IEEE80211A)
+		rt2x00_set_field16(
+			&rt2x00dev->led_reg, MCU_LEDCS_LINK_A_STATUS, 1);
+	else
+		rt2x00_set_field16(
+			&rt2x00dev->led_reg, MCU_LEDCS_LINK_BG_STATUS, 1);
+
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_LED_CONTROL, USB_VENDOR_REQUEST_OUT,
+		0x00, rt2x00dev->led_reg, NULL, 0, REGISTER_TIMEOUT);
+}
+
+static void rt73usb_disable_led(struct rt2x00_dev *rt2x00dev)
+{
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_RADIO_STATUS, 0);
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_LINK_BG_STATUS, 0);
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_LINK_A_STATUS, 0);
+
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_LED_CONTROL, USB_VENDOR_REQUEST_OUT,
+		0x00, rt2x00dev->led_reg, NULL, 0, REGISTER_TIMEOUT);
+}
+
+static void rt73usb_activity_led(struct rt2x00_dev *rt2x00dev, char rssi)
+{
+	u32 led;
+
+	if (rt2x00dev->led_mode != LED_MODE_SIGNAL_STRENGTH)
+		return;
+
+	if (rssi <= 30)
+		led = 0;
+	else if (rssi <= 39)
+		led = 1;
+	else if (rssi <= 49)
+		led = 2;
+	else if (rssi <= 53)
+		led = 3;
+	else if (rssi <= 63)
+		led = 4;
+	else
+		led = 5;
+
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_LED_CONTROL, USB_VENDOR_REQUEST_OUT,
+		led, rt2x00dev->led_reg, NULL, 0, REGISTER_TIMEOUT);
+}
+
+/*
+ * Link tuning
+ */
+static void rt73usb_link_tuner(struct rt2x00_dev *rt2x00dev, int rssi)
+{
+	u32 reg;
+	u8 r17;
+	u8 up_bound;
+	u8 low_bound;
+
+	/*
+	 * Update Led strength
+	 */
+	rt73usb_activity_led(rt2x00dev, rssi);
+
+	rt73usb_bbp_read(rt2x00dev, 17, &r17);
+
+	/*
+	 * Determine r17 bounds.
+	 */
+	if (rt2x00dev->rx_status.phymode == MODE_IEEE80211A) {
+		low_bound = 0x28;
+		up_bound = 0x48;
+
+		if (test_bit(CONFIG_EXTERNAL_LNA, &rt2x00dev->flags)) {
+			low_bound += 0x10;
+			up_bound += 0x10;
+		}
+	} else {
+		if (rssi > -82) {
+			low_bound = 0x1c;
+			up_bound = 0x40;
+		} else if (rssi > -84) {
+			low_bound = 0x1c;
+			up_bound = 0x20;
+		} else {
+			low_bound = 0x1c;
+			up_bound = 0x1c;
+		}
+
+		if (test_bit(CONFIG_EXTERNAL_LNA, &rt2x00dev->flags)) {
+			low_bound += 0x14;
+			up_bound += 0x10;
+		}
+	}
+
+	/*
+	 * Special big-R17 for very short distance
+	 */
+	if (rssi > -35) {
+		if (r17 != 0x60)
+			rt73usb_bbp_write(rt2x00dev, 17, 0x60);
+		return;
+	}
+
+	/*
+	 * Special big-R17 for short distance
+	 */
+	if (rssi >= -58) {
+		if (r17 != up_bound)
+			rt73usb_bbp_write(rt2x00dev, 17, up_bound);
+		return;
+	}
+
+	/*
+	 * Special big-R17 for middle-short distance
+	 */
+	if (rssi >= -66) {
+		low_bound += 0x10;
+		if (r17 != low_bound)
+			rt73usb_bbp_write(rt2x00dev, 17, low_bound);
+		return;
+	}
+
+	/*
+	 * Special mid-R17 for middle distance
+	 */
+	if (rssi >= -74) {
+		if (r17 != (low_bound + 0x10))
+			rt73usb_bbp_write(rt2x00dev, 17, low_bound + 0x08);
+		return;
+	}
+
+	/*
+	 * Special case: Change up_bound based on the rssi.
+	 * Lower up_bound when rssi is weaker then -74 dBm.
+	 */
+	up_bound -= 2 * (-74 - rssi);
+	if (low_bound > up_bound)
+		up_bound = low_bound;
+
+	if (r17 > up_bound) {
+		rt73usb_bbp_write(rt2x00dev, 17, up_bound);
+		return;
+	}
+
+	/*
+	 * r17 does not yet exceed upper limit, continue and base
+	 * the r17 tuning on the false CCA count.
+	 */
+	rt73usb_register_read(rt2x00dev, STA_CSR1, &reg);
+	reg = rt2x00_get_field32(reg, STA_CSR1_FALSE_CCA_ERROR);
+	rt2x00dev->link.false_cca =
+		rt2x00_get_field32(reg, STA_CSR1_FALSE_CCA_ERROR);
+
+	if (rt2x00dev->link.false_cca > 512 && r17 < up_bound) {
+		r17 += 4;
+		if (r17 > up_bound)
+			r17 = up_bound;
+		rt73usb_bbp_write(rt2x00dev, 17, r17);
+	} else if (rt2x00dev->link.false_cca < 100 && r17 > low_bound) {
+		r17 -= 4;
+		if (r17 < low_bound)
+			r17 = low_bound;
+		rt73usb_bbp_write(rt2x00dev, 17, r17);
+	}
+}
+
+/*
+ * Firmware name function.
+ */
+static char *rt73usb_get_fw_name(struct rt2x00_dev *rt2x00dev)
+{
+	return FIRMWARE_RT2571;
+}
+
+/*
+ * Initialization functions.
+ */
+static int rt73usb_load_firmware(struct rt2x00_dev *rt2x00dev, void *data,
+	const size_t len)
+{
+	unsigned int i;
+	int status;
+	u32 reg;
+	char buf[64];
+	char *ptr = data;
+	int buflen;
+
+	/*
+	 * Wait for stable hardware.
+	 */
+	for (i = 0; i < 100; i++) {
+		rt73usb_register_read(rt2x00dev, MAC_CSR0, &reg);
+		if (reg)
+			break;
+		msleep(1);
+	}
+
+	if (!reg) {
+		ERROR(rt2x00dev, "Unstable hardware.\n");
+		return -EBUSY;
+	}
+
+	/*
+	 * Write firmware to device.
+	 */
+	for (i = 0; i < len; i += sizeof(buf)) {
+		buflen = min(len - i, sizeof(buf));
+		memcpy(buf, ptr, buflen);
+		rt73usb_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE + i,
+			buf, buflen);
+		ptr += buflen;
+	}
+
+	/*
+	 * Send firmware request to device to load firmware,
+	 * we need to specify a long timeout time.
+	 */
+	status = rt2x00usb_vendor_request(rt2x00dev, USB_DEVICE_MODE,
+		USB_VENDOR_REQUEST_OUT, 0x00, USB_MODE_FIRMWARE,
+		NULL, 0, REGISTER_TIMEOUT_FIRMWARE);
+	if (status  < 0) {
+		ERROR(rt2x00dev, "Failed to write Firmware to device.\n");
+		return status;
+	}
+
+	rt73usb_disable_led(rt2x00dev);
+
+	return 0;
+}
+
+static void rt73usb_init_rxring(struct rt2x00_dev *rt2x00dev)
+{
+	struct usb_device *usb_dev =
+		interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
+	unsigned int i;
+
+	for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
+		usb_fill_bulk_urb(
+			rt2x00dev->rx->entry[i].priv,
+			usb_dev,
+			usb_rcvbulkpipe(usb_dev, 1),
+			rt2x00dev->rx->entry[i].skb->data,
+			rt2x00dev->rx->entry[i].skb->len,
+			rt73usb_interrupt_rxdone,
+			&rt2x00dev->rx->entry[i]);
+	}
+
+	rt2x00_ring_index_clear(rt2x00dev->rx);
+}
+
+static void rt73usb_init_txring(struct rt2x00_dev *rt2x00dev,
+	const int queue)
+{
+	struct data_ring *ring = rt2x00_get_ring(rt2x00dev, queue);
+	unsigned int i;
+
+	for (i = 0; i < ring->stats.limit; i++)
+		ring->entry[i].flags = 0;
+
+	rt2x00_ring_index_clear(ring);
+}
+
+static int rt73usb_init_rings(struct rt2x00_dev *rt2x00dev)
+{
+	rt73usb_init_rxring(rt2x00dev);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_DATA1);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_DATA2);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_DATA3);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_DATA4);
+	rt73usb_init_txring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
+
+	return 0;
+}
+
+static int rt73usb_init_registers(struct rt2x00_dev *rt2x00dev)
+{
+	u32 reg;
+
+	if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
+		return -EBUSY;
+
+	rt73usb_register_write(rt2x00dev, MAC_CSR10, 0x00000718);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, 0x025eb032);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR1, 0x9eaa9eaf);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR2, 0x8a8b8c8d);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR3, 0x00858687);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR7, 0x2e31353b);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR8, 0x2a2a2a2c);
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR15, 0x0000000f);
+
+	rt73usb_register_write(rt2x00dev, MAC_CSR6, 0x00000fff);
+
+	rt73usb_register_write(rt2x00dev, MAC_CSR13, 0x00007f00);
+
+	rt73usb_register_write(rt2x00dev, SEC_CSR0, 0x00000000);
+	rt73usb_register_write(rt2x00dev, SEC_CSR1, 0x00000000);
+	rt73usb_register_write(rt2x00dev, SEC_CSR5, 0x00000000);
+
+	reg = 0x000023b0;
+	if (rt2x00_rf(&rt2x00dev->chip, RF5225) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF2527))
+		rt2x00_set_field32(&reg, PHY_CSR1_RF_RPI, 1);
+	rt73usb_register_write(rt2x00dev, PHY_CSR1, reg);
+
+	rt73usb_register_write(rt2x00dev, PHY_CSR5, 0x00040a06);
+	rt73usb_register_write(rt2x00dev, PHY_CSR6, 0x00080606);
+	rt73usb_register_write(rt2x00dev, PHY_CSR7, 0x00000408);
+
+	rt73usb_register_read(rt2x00dev, AC_TXOP_CSR0, &reg);
+	rt2x00_set_field32(&reg, AC_TXOP_CSR0_AC0_TX_OP, 0);
+	rt2x00_set_field32(&reg, AC_TXOP_CSR0_AC1_TX_OP, 0);
+	rt73usb_register_write(rt2x00dev, AC_TXOP_CSR0, reg);
+
+	rt73usb_register_read(rt2x00dev, AC_TXOP_CSR1, &reg);
+	rt2x00_set_field32(&reg, AC_TXOP_CSR1_AC2_TX_OP, 192);
+	rt2x00_set_field32(&reg, AC_TXOP_CSR1_AC3_TX_OP, 48);
+	rt73usb_register_write(rt2x00dev, AC_TXOP_CSR1, reg);
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR9, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR9_CW_SELECT, 0);
+	rt73usb_register_write(rt2x00dev, MAC_CSR9, reg);
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR0_AUTO_TX_SEQ, 1);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+
+	/*
+	 * We must clear the error counters.
+	 * These registers are cleared on read,
+	 * so we may pass a useless variable to store the value.
+	 */
+	rt73usb_register_read(rt2x00dev, STA_CSR0, &reg);
+	rt73usb_register_read(rt2x00dev, STA_CSR1, &reg);
+	rt73usb_register_read(rt2x00dev, STA_CSR2, &reg);
+
+	/*
+	 * Reset MAC and BBP registers.
+	 */
+	reg = 0;
+	rt2x00_set_field32(&reg, MAC_CSR1_SOFT_RESET, 1);
+	rt2x00_set_field32(&reg, MAC_CSR1_BBP_RESET, 1);
+	rt73usb_register_write(rt2x00dev, MAC_CSR1, reg);
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR1, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR1_SOFT_RESET, 0);
+	rt2x00_set_field32(&reg, MAC_CSR1_BBP_RESET, 0);
+	rt73usb_register_write(rt2x00dev, MAC_CSR1, reg);
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR1, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR1_HOST_READY, 1);
+	rt73usb_register_write(rt2x00dev, MAC_CSR1, reg);
+
+	return 0;
+}
+
+static int rt73usb_init_bbp(struct rt2x00_dev *rt2x00dev)
+{
+	unsigned int i;
+	u16 eeprom;
+	u8 reg_id;
+	u8 value;
+
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		rt73usb_bbp_read(rt2x00dev, 0, &value);
+		if ((value != 0xff) && (value != 0x00))
+			goto continue_csr_init;
+		NOTICE(rt2x00dev, "Waiting for BBP register.\n");
+		udelay(REGISTER_BUSY_DELAY);
+	}
+
+	ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
+	return -EACCES;
+
+continue_csr_init:
+	rt73usb_bbp_write(rt2x00dev, 3, 0x80);
+	rt73usb_bbp_write(rt2x00dev, 15, 0x30);
+	rt73usb_bbp_write(rt2x00dev, 17, 0x20);
+	rt73usb_bbp_write(rt2x00dev, 21, 0xc8);
+	rt73usb_bbp_write(rt2x00dev, 22, 0x38);
+	rt73usb_bbp_write(rt2x00dev, 23, 0x06);
+	rt73usb_bbp_write(rt2x00dev, 24, 0xfe);
+	rt73usb_bbp_write(rt2x00dev, 25, 0x0a);
+	rt73usb_bbp_write(rt2x00dev, 26, 0x0d);
+	rt73usb_bbp_write(rt2x00dev, 32, 0x0b);
+	rt73usb_bbp_write(rt2x00dev, 34, 0x12);
+	rt73usb_bbp_write(rt2x00dev, 37, 0x07);
+	rt73usb_bbp_write(rt2x00dev, 39, 0xf8);
+	rt73usb_bbp_write(rt2x00dev, 41, 0x60);
+	rt73usb_bbp_write(rt2x00dev, 53, 0x10);
+	rt73usb_bbp_write(rt2x00dev, 54, 0x18);
+	rt73usb_bbp_write(rt2x00dev, 60, 0x10);
+	rt73usb_bbp_write(rt2x00dev, 61, 0x04);
+	rt73usb_bbp_write(rt2x00dev, 62, 0x04);
+	rt73usb_bbp_write(rt2x00dev, 75, 0xfe);
+	rt73usb_bbp_write(rt2x00dev, 86, 0xfe);
+	rt73usb_bbp_write(rt2x00dev, 88, 0xfe);
+	rt73usb_bbp_write(rt2x00dev, 90, 0x0f);
+	rt73usb_bbp_write(rt2x00dev, 99, 0x00);
+	rt73usb_bbp_write(rt2x00dev, 102, 0x16);
+	rt73usb_bbp_write(rt2x00dev, 107, 0x04);
+
+	DEBUG(rt2x00dev, "Start initialization from EEPROM...\n");
+	for (i = 0; i < EEPROM_BBP_SIZE; i++) {
+		rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);
+
+		if (eeprom != 0xffff && eeprom != 0x0000) {
+			reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
+			value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
+			DEBUG(rt2x00dev, "BBP: 0x%02x, value: 0x%02x.\n",
+				reg_id, value);
+			rt73usb_bbp_write(rt2x00dev, reg_id, value);
+		}
+	}
+	DEBUG(rt2x00dev, "...End initialization from EEPROM.\n");
+
+	return 0;
+}
+
+/*
+ * Device state switch handlers.
+ */
+static void rt73usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
+	enum dev_state state)
+{
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR0_DISABLE_RX,
+		state == STATE_RADIO_RX_OFF);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
+}
+
+static int rt73usb_enable_radio(struct rt2x00_dev *rt2x00dev)
+{
+	/*
+	 * Initialize all registers.
+	 */
+	if (rt73usb_init_rings(rt2x00dev) ||
+	    rt73usb_init_registers(rt2x00dev) ||
+	    rt73usb_init_bbp(rt2x00dev)) {
+		ERROR(rt2x00dev, "Register initialization failed.\n");
+		return -EIO;
+	}
+
+	rt2x00usb_enable_radio(rt2x00dev);
+
+	/*
+	 * Enable LED
+	 */
+	rt73usb_enable_led(rt2x00dev);
+
+	return 0;
+}
+
+static void rt73usb_disable_radio(struct rt2x00_dev *rt2x00dev)
+{
+	/*
+	 * Disable LED
+	 */
+	rt73usb_disable_led(rt2x00dev);
+
+	rt73usb_register_write(rt2x00dev, MAC_CSR10, 0x00001818);
+
+	/*
+	 * Disable synchronisation.
+	 */
+	rt73usb_register_write(rt2x00dev, TXRX_CSR9, 0);
+
+	rt2x00usb_disable_radio(rt2x00dev);
+}
+
+static int rt73usb_set_state(struct rt2x00_dev *rt2x00dev,
+	enum dev_state state)
+{
+	u32 reg;
+	unsigned int i;
+	char put_to_sleep;
+	char current_state;
+
+	put_to_sleep = (state != STATE_AWAKE);
+
+	if (!put_to_sleep)
+		rt2x00usb_vendor_request(rt2x00dev,
+			USB_DEVICE_MODE, USB_VENDOR_REQUEST_OUT,
+			0x00, USB_MODE_WAKEUP, NULL, 0, REGISTER_TIMEOUT);
+
+	rt73usb_register_read(rt2x00dev, MAC_CSR12, &reg);
+	rt2x00_set_field32(&reg, MAC_CSR12_FORCE_WAKEUP, !put_to_sleep);
+	rt2x00_set_field32(&reg, MAC_CSR12_PUT_TO_SLEEP, put_to_sleep);
+	rt73usb_register_write(rt2x00dev, MAC_CSR12, reg);
+
+	if (put_to_sleep)
+		rt2x00usb_vendor_request(rt2x00dev,
+			USB_DEVICE_MODE, USB_VENDOR_REQUEST_OUT,
+			0x00, USB_MODE_SLEEP, NULL, 0, REGISTER_TIMEOUT);
+
+	/*
+	 * Device is not guaranteed to be in the requested state yet.
+	 * We must wait until the register indicates that the
+	 * device has entered the correct state.
+	 */
+	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
+		rt73usb_register_read(rt2x00dev, MAC_CSR12, &reg);
+		current_state = rt2x00_get_field32(reg,
+			MAC_CSR12_BBP_CURRENT_STATE);
+		if (current_state == !put_to_sleep)
+			return 0;
+		msleep(10);
+	}
+
+	NOTICE(rt2x00dev, "Device failed to enter state %d, "
+		"current device state %d.\n", !put_to_sleep, current_state);
+
+	return -EBUSY;
+}
+
+static int rt73usb_set_device_state(struct rt2x00_dev *rt2x00dev,
+	enum dev_state state)
+{
+	int retval = 0;
+
+	switch (state) {
+		case STATE_RADIO_ON:
+			retval = rt73usb_enable_radio(rt2x00dev);
+		break;
+		case STATE_RADIO_OFF:
+			rt73usb_disable_radio(rt2x00dev);
+		break;
+		case STATE_RADIO_RX_ON:
+		case STATE_RADIO_RX_OFF:
+			rt73usb_toggle_rx(rt2x00dev, state);
+		break;
+		case STATE_DEEP_SLEEP:
+		case STATE_SLEEP:
+		case STATE_STANDBY:
+		case STATE_AWAKE:
+			retval = rt73usb_set_state(rt2x00dev, state);
+		break;
+		default:
+			retval = -ENOTSUPP;
+		break;
+	}
+
+	return retval;
+}
+
+/*
+ * TX descriptor initialization
+ */
+static void rt73usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
+	struct data_entry *entry, struct data_desc *txd,
+	struct data_entry_desc *desc, struct ieee80211_hdr *ieee80211hdr,
+	unsigned int length, struct ieee80211_tx_control *control)
+{
+	u32 word;
+
+	/*
+	 * Start writing the descriptor words.
+	 */
+	rt2x00_desc_read(txd, 1, &word);
+	rt2x00_set_field32(&word, TXD_W1_HOST_Q_ID, desc->queue);
+	rt2x00_set_field32(&word, TXD_W1_AIFSN, entry->ring->tx_params.aifs);
+	rt2x00_set_field32(&word, TXD_W1_CWMIN, entry->ring->tx_params.cw_min);
+	rt2x00_set_field32(&word, TXD_W1_CWMAX, entry->ring->tx_params.cw_max);
+	rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
+	rt2x00_set_field32(&word, TXD_W1_HW_SEQUENCE, 1);
+	rt2x00_desc_write(txd, 1, word);
+
+	rt2x00_desc_read(txd, 2, &word);
+	rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, desc->signal);
+	rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, desc->service);
+	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, desc->length_low);
+	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, desc->length_high);
+	rt2x00_desc_write(txd, 2, word);
+
+	rt2x00_desc_read(txd, 5, &word);
+	rt2x00_set_field32(&word, TXD_W5_TX_POWER,
+		TXPOWER_TO_DEV(control->power_level));
+	rt2x00_set_field32(&word, TXD_W5_WAITING_DMA_DONE_INT, 1);
+	rt2x00_desc_write(txd, 5, word);
+
+	rt2x00_desc_read(txd, 0, &word);
+	rt2x00_set_field32(&word, TXD_W0_VALID, 1);
+	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
+		test_bit(ENTRY_TXD_MORE_FRAG, &entry->flags));
+	rt2x00_set_field32(&word, TXD_W0_ACK,
+		test_bit(ENTRY_TXD_REQ_ACK, &entry->flags));
+	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
+		test_bit(ENTRY_TXD_REQ_TIMESTAMP, &entry->flags));
+	rt2x00_set_field32(&word, TXD_W0_OFDM,
+		test_bit(ENTRY_TXD_OFDM_RATE, &entry->flags));
+	rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);
+	rt2x00_set_field32(&word, TXD_W0_RETRY_MODE, 0);
+	rt2x00_set_field32(&word, TXD_W0_TKIP_MIC, 0);
+	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
+	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);
+	rt2x00_desc_write(txd, 0, word);
+}
+
+/*
+ * TX data initialization
+ */
+static void rt73usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev, int queue)
+{
+	u32 reg;
+
+	if (queue != IEEE80211_TX_QUEUE_BEACON)
+		return;
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
+	if (!rt2x00_get_field32(reg, TXRX_CSR9_BEACON_GEN)) {
+		rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 1);
+		rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
+	}
+}
+
+/*
+ * Interrupt functions.
+ */
+static void rt73usb_interrupt_rxdone(struct urb *urb)
+{
+	struct data_entry *entry = (struct data_entry*)urb->context;
+	struct data_ring *ring = entry->ring;
+	struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
+	struct data_desc *rxd = (struct data_desc*)entry->skb->data;
+	u32 word0;
+	u32 word1;
+	int signal;
+	int rssi;
+	int ofdm;
+	u16 size;
+
+	if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
+	    !__test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags))
+		return;
+
+	/*
+	 * Check if the received data is simply too small
+	 * to be actually valid, or if the urb is signaling
+	 * a problem.
+	 */
+	if (urb->actual_length < entry->ring->desc_size || urb->status)
+		goto skip_entry;
+
+	rt2x00_desc_read(rxd, 0, &word0);
+	rt2x00_desc_read(rxd, 1, &word1);
+
+	/*
+	 * TODO: Don't we need to keep statistics
+	 * updated about events like CRC and physical errors?
+	 */
+	if (rt2x00_get_field32(word0, RXD_W0_CRC) ||
+	    rt2x00_get_field32(word0, RXD_W0_CIPHER_ERROR))
+		goto skip_entry;
+
+	/*
+	 * Obtain the status about this packet.
+	 */
+	size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
+	signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
+	rssi = rt2x00_get_field32(word1, RXD_W1_RSSI);
+	ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
+
+	/*
+	 * Trim the skb_buffer to only contain the valid
+	 * frame data (so ignore the device's descriptor).
+	 */
+	skb_pull(entry->skb, ring->desc_size);
+	skb_trim(entry->skb, size);
+
+	/*
+	 * Send the packet to upper layer, and update urb.
+	 */
+	rt2x00lib_rxdone(entry, NULL, ring->data_size + ring->desc_size,
+		signal, rssi, ofdm);
+	urb->transfer_buffer = entry->skb->data;
+	urb->transfer_buffer_length = entry->skb->len;
+
+skip_entry:
+	if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) {
+		__set_bit(ENTRY_OWNER_NIC, &entry->flags);
+		usb_submit_urb(urb, GFP_ATOMIC);
+	}
+
+	rt2x00_ring_index_inc(ring);
+}
+
+/*
+ * Device initialization functions.
+ */
+static int rt73usb_alloc_eeprom(struct rt2x00_dev *rt2x00dev)
+{
+	u16 word;
+
+	/*
+	 * Allocate the eeprom memory, check the eeprom width
+	 * and copy the entire eeprom into this allocated memory.
+	 */
+	rt2x00dev->eeprom = kzalloc(EEPROM_SIZE, GFP_KERNEL);
+	if (!rt2x00dev->eeprom)
+		return -ENOMEM;
+
+	rt2x00usb_vendor_request(
+		rt2x00dev, USB_EEPROM_READ, USB_VENDOR_REQUEST_IN,
+		EEPROM_BASE, 0x00, rt2x00dev->eeprom, EEPROM_SIZE,
+		REGISTER_TIMEOUT * (EEPROM_SIZE / sizeof(u16)));
+
+	/*
+	 * Start validation of the data that has been read.
+	 */
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
+	if (word == 0xffff) {
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_TX_DEFAULT, 2);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_RX_DEFAULT, 2);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_FRAME_TYPE, 0);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_DYN_TXAGC, 0);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_HARDWARE_RADIO, 0);
+		rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF5226);
+		rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
+		EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
+	}
+
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
+	if (word == 0xffff) {
+		rt2x00_set_field16(&word, EEPROM_NIC_EXTERNAL_LNA, 0);
+		rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
+		EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
+	}
+
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_LED, &word);
+	if (word == 0xffff) {
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_RDY_G, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_RDY_A, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_ACT, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_GPIO_0, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_GPIO_1, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_GPIO_2, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_GPIO_3, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_POLARITY_GPIO_4, 0);
+		rt2x00_set_field16(&word, EEPROM_LED_LED_MODE,
+			LED_MODE_DEFAULT);
+		rt2x00_eeprom_write(rt2x00dev, EEPROM_LED, word);
+		EEPROM(rt2x00dev, "Led: 0x%04x\n", word);
+	}
+
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ, &word);
+	if (word == 0xffff) {
+		rt2x00_set_field16(&word, EEPROM_FREQ_OFFSET, 0);
+		rt2x00_set_field16(&word, EEPROM_FREQ_SEQ, 0);
+		rt2x00_eeprom_write(rt2x00dev, EEPROM_FREQ, word);
+		EEPROM(rt2x00dev, "Freq: 0x%04x\n", word);
+	}
+
+	return 0;
+}
+
+static int rt73usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
+{
+	u32 reg;
+	u16 value;
+	u16 eeprom;
+
+	/*
+	 * Read EEPROM word for configuration.
+	 */
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
+
+	/*
+	 * Identify RF chipset.
+	 */
+	value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
+	rt73usb_register_read(rt2x00dev, MAC_CSR0, &reg);
+	rt2x00_set_chip(rt2x00dev, RT2571, value, reg);
+
+	if (!rt2x00_rf(&rt2x00dev->chip, RF5226) &&
+	    !rt2x00_rf(&rt2x00dev->chip, RF2528) &&
+	    !rt2x00_rf(&rt2x00dev->chip, RF5225) &&
+	    !rt2x00_rf(&rt2x00dev->chip, RF2527)) {
+		ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * Identify default antenna configuration.
+	 */
+	rt2x00dev->hw->conf.antenna_sel_tx = rt2x00_get_field16(eeprom,
+		EEPROM_ANTENNA_TX_DEFAULT);
+	rt2x00dev->hw->conf.antenna_sel_rx = rt2x00_get_field16(eeprom,
+		EEPROM_ANTENNA_RX_DEFAULT);
+
+	/*
+	 * Read the Frame type.
+	 */
+	if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_FRAME_TYPE))
+		__set_bit(CONFIG_FRAME_TYPE, &rt2x00dev->flags);
+
+	/*
+	 * Read frequency offset.
+	 */
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ, &eeprom);
+	rt2x00dev->freq_offset =
+		rt2x00_get_field16(eeprom, EEPROM_FREQ_OFFSET);
+
+	/*
+	 * Read external LNA informations.
+	 */
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
+
+	if (rt2x00_get_field16(eeprom, EEPROM_NIC_EXTERNAL_LNA))
+		__set_bit(CONFIG_EXTERNAL_LNA, &rt2x00dev->flags);
+
+	/*
+	 * Store led settings, for correct led behaviour.
+	 */
+	rt2x00_eeprom_read(rt2x00dev, EEPROM_LED, &eeprom);
+
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_LED_MODE,
+		rt2x00dev->led_mode);
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_GPIO_0,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_GPIO_0));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_GPIO_1,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_GPIO_1));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_GPIO_2,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_GPIO_2));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_GPIO_3,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_GPIO_3));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_GPIO_4,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_GPIO_4));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_ACT,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_ACT));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_READY_BG,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_RDY_G));
+	rt2x00_set_field16(&rt2x00dev->led_reg, MCU_LEDCS_POLARITY_READY_A,
+		rt2x00_get_field16(eeprom, EEPROM_LED_POLARITY_RDY_A));
+
+	return 0;
+}
+
+static const struct {
+	unsigned int chip;
+	u32 val[3];
+} rf_vals[] = {
+	{ RF5226,	{ 0x00002c0c, 0x00068255 } },
+	{ RF2528,	{ 0x00002c0c, 0x00068255 } },
+	{ RF5225,	{ 0x00002ccc, 0x00000000 } },
+	{ RF2527,	{ 0x00002ccc, 0x00068455 } },
+};
+
+/*
+ * RF value list for RF5226, RF2528, RF5225 & RF2527
+ * Supports: 2.4 GHz
+ */
+static const u32 rf_vals_bg[] = {
+	0x00000786, 0x00000786, 0x0000078a, 0x0000078a, 0x0000078e,
+	0x0000078e, 0x00000792, 0x00000792, 0x00000796, 0x00000796,
+	0x0000079a, 0x0000079a, 0x0000079e, 0x000007a2
+};
+
+/*
+ * RF value list for RF5226 & RF5225 (supplement to vals_bg)
+ * Supports: 5.2 GHz
+ */
+static const u32 rf_vals_a_5x[] = {
+	0x0000099a, 0x000009a2, 0x000009a6, 0x000009aa, 0x000009ae,
+	0x000009b2, 0x000009ba, 0x000009be, 0x00000a2a, 0x00000a2e,
+	0x00000a32, 0x00000a36, 0x00000a3a, 0x00000a82, 0x00000a86,
+	0x00000a8a, 0x00000a8e, 0x00000a92, 0x00000a9a, 0x00000aa2,
+	0x00000aa6, 0x00000aae, 0x00000ab2, 0x00000ab6
+};
+
+static void rt73usb_init_hw_mode(struct rt2x00_dev *rt2x00dev)
+{
+	struct hw_mode_spec *spec = &rt2x00dev->spec;
+	u8 *txpower;
+	unsigned int i;
+
+	/*
+	 * Initialize all hw fields.
+	 */
+	rt2x00dev->hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
+		IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+		IEEE80211_HW_WEP_INCLUDE_IV |
+		IEEE80211_HW_DATA_NULLFUNC_ACK |
+		IEEE80211_HW_NO_TKIP_WMM_HWACCEL |
+		IEEE80211_HW_MONITOR_DURING_OPER;
+	rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE;
+	rt2x00dev->hw->max_rssi = MAX_RX_SSI;
+	rt2x00dev->hw->max_noise = MAX_RX_NOISE;
+	rt2x00dev->hw->queues = 5;
+
+	/*
+	 * Set device specific, but channel independent RF values.
+	 */
+	for (i = 0; i < ARRAY_SIZE(rf_vals); i++) {
+		if (rt2x00_rf(&rt2x00dev->chip, rf_vals[i].chip)) {
+			rt2x00dev->rf1 = rf_vals[i].val[0];
+			rt2x00dev->rf3 = rf_vals[i].val[1];
+		}
+	}
+
+	/*
+	 * Convert tx_power array in eeprom.
+	 */
+	txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_G_START);
+	for (i = 0; i < 14; i++)
+		txpower[i] = TXPOWER_FROM_DEV(txpower[i]);
+
+	/*
+	 * Initialize hw_mode information.
+	 */
+	spec->mac_addr = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
+	spec->num_modes = 2;
+	spec->num_rates = 12;
+	spec->num_channels = 14;
+	spec->tx_power_a = NULL;
+	spec->tx_power_bg = txpower;
+	spec->tx_power_default = DEFAULT_TXPOWER;
+	spec->chan_val_a = NULL;
+	spec->chan_val_bg = rf_vals_bg;
+
+	if (rt2x00_rf(&rt2x00dev->chip, RF5225) ||
+	    rt2x00_rf(&rt2x00dev->chip, RF5226)) {
+		spec->num_modes = 3;
+		spec->num_channels += 24;
+
+		txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_A_START);
+		for (i = 0; i < 14; i++)
+			txpower[i] = TXPOWER_FROM_DEV(txpower[i]);
+
+		spec->tx_power_a = txpower;
+		spec->chan_val_a = rf_vals_a_5x;
+	}
+}
+
+static int rt73usb_init_hw(struct rt2x00_dev *rt2x00dev)
+{
+	int retval;
+
+	/*
+	 * Allocate eeprom data.
+	 */
+	retval = rt73usb_alloc_eeprom(rt2x00dev);
+	if (retval)
+		return retval;
+
+	retval = rt73usb_init_eeprom(rt2x00dev);
+	if (retval)
+		return retval;
+
+	/*
+	 * Initialize hw specifications.
+	 */
+	rt73usb_init_hw_mode(rt2x00dev);
+
+	/*
+	 * rt73usb requires firmware
+	 */
+	__set_bit(FIRMWARE_REQUIRED, &rt2x00dev->flags);
+
+	return 0;
+}
+
+/*
+ * IEEE80211 stack callback functions.
+ */
+static int rt73usb_get_stats(struct ieee80211_hw *hw,
+	struct ieee80211_low_level_stats *stats)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	u32 reg;
+
+	/*
+	 * Update FCS error count from register.
+	 * The dot11ACKFailureCount, dot11RTSFailureCount and
+	 * dot11RTSSuccessCount are updated in interrupt time.
+	 */
+	rt73usb_register_read(rt2x00dev, STA_CSR0, &reg);
+	rt2x00dev->low_level_stats.dot11FCSErrorCount +=
+		rt2x00_get_field32(reg, STA_CSR0_FCS_ERROR);
+
+	memcpy(stats, &rt2x00dev->low_level_stats, sizeof(*stats));
+
+	return 0;
+}
+
+static int rt73usb_set_retry_limit(struct ieee80211_hw *hw,
+	u32 short_retry, u32 long_retry)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
+	rt2x00_set_field32(&reg, TXRX_CSR4_LONG_RETRY_LIMIT, long_retry);
+	rt2x00_set_field32(&reg, TXRX_CSR4_SHORT_RETRY_LIMIT, short_retry);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
+
+	return 0;
+}
+
+static u64 rt73usb_get_tsf(struct ieee80211_hw *hw)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	u64 tsf;
+	u32 reg;
+
+	rt73usb_register_read(rt2x00dev, TXRX_CSR13, &reg);
+	tsf = (u64)rt2x00_get_field32(reg, TXRX_CSR13_HIGH_TSFTIMER) << 32;
+	rt73usb_register_read(rt2x00dev, TXRX_CSR12, &reg);
+	tsf |= rt2x00_get_field32(reg, TXRX_CSR12_LOW_TSFTIMER);
+
+	return tsf;
+}
+
+static void rt73usb_reset_tsf(struct ieee80211_hw *hw)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	rt73usb_register_write(rt2x00dev, TXRX_CSR12, 0);
+	rt73usb_register_write(rt2x00dev, TXRX_CSR13, 0);
+}
+
+static const struct ieee80211_ops rt73usb_mac80211_ops = {
+	.tx			= rt2x00lib_tx,
+	.reset			= rt2x00lib_reset,
+	.open			= rt2x00lib_open,
+	.stop			= rt2x00lib_stop,
+	.add_interface		= rt2x00lib_add_interface,
+	.remove_interface	= rt2x00lib_remove_interface,
+	.config			= rt2x00lib_config,
+	.config_interface	= rt2x00lib_config_interface,
+	.set_multicast_list	= rt2x00lib_set_multicast_list,
+	.get_stats		= rt73usb_get_stats,
+	.set_retry_limit	= rt73usb_set_retry_limit,
+	.conf_tx		= rt2x00lib_conf_tx,
+	.get_tx_stats		= rt2x00lib_get_tx_stats,
+	.get_tsf		= rt73usb_get_tsf,
+	.reset_tsf		= rt73usb_reset_tsf,
+	.beacon_update		= rt2x00usb_beacon_update,
+};
+
+static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
+	.init_hw		= rt73usb_init_hw,
+	.get_fw_name		= rt73usb_get_fw_name,
+	.load_firmware		= rt73usb_load_firmware,
+	.initialize		= rt2x00usb_initialize,
+	.uninitialize		= rt2x00usb_uninitialize,
+	.set_device_state	= rt73usb_set_device_state,
+	.link_tuner		= rt73usb_link_tuner,
+	.write_tx_desc		= rt73usb_write_tx_desc,
+	.write_tx_data		= rt2x00usb_write_tx_data,
+	.kick_tx_queue		= rt73usb_kick_tx_queue,
+	.config_type		= rt73usb_config_type,
+	.config_phymode		= rt73usb_config_phymode,
+	.config_channel		= rt73usb_config_channel,
+	.config_mac_addr	= rt73usb_config_mac_addr,
+	.config_bssid		= rt73usb_config_bssid,
+	.config_promisc		= rt73usb_config_promisc,
+	.config_txpower		= rt73usb_config_txpower,
+	.config_antenna		= rt73usb_config_antenna,
+	.config_duration	= rt73usb_config_duration,
+};
+
+static const struct rt2x00_ops rt73usb_ops = {
+	.name	= DRV_NAME,
+	.rxd_size = RXD_DESC_SIZE,
+	.txd_size = TXD_DESC_SIZE,
+	.lib	= &rt73usb_rt2x00_ops,
+	.hw	= &rt73usb_mac80211_ops,
+#ifdef CONFIG_RT2X00_LIB_DEBUGFS
+	.debugfs = &rt73usb_rt2x00debug,
+#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
+};
+
+/*
+ * rt73usb module information.
+ */
+static struct usb_device_id rt73usb_device_table[] = {
+	/* AboCom */
+	{ USB_DEVICE(0x07b8, 0xb21d), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Askey */
+	{ USB_DEVICE(0x1690, 0x0722), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* ASUS */
+	{ USB_DEVICE(0x0b05, 0x1723), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x0b05, 0x1724), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Belkin */
+	{ USB_DEVICE(0x050d, 0x7050), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x050d, 0x705a), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x050d, 0x905b), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Billionton */
+	{ USB_DEVICE(0x1631, 0xc019), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* CNet */
+	{ USB_DEVICE(0x1371, 0x9022), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x1371, 0x9032), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Conceptronic */
+	{ USB_DEVICE(0x14b2, 0x3c22), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* D-Link */
+	{ USB_DEVICE(0x07d1, 0x3c03), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x07d1, 0x3c04), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Gemtek */
+	{ USB_DEVICE(0x15a9, 0x0004), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Gigabyte */
+	{ USB_DEVICE(0x1044, 0x8008), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x1044, 0x800a), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Huawei-3Com */
+	{ USB_DEVICE(0x1472, 0x0009), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Hercules */
+	{ USB_DEVICE(0x06f8, 0xe010), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x06f8, 0xe020), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Linksys */
+	{ USB_DEVICE(0x13b1, 0x0020), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x13b1, 0x0023), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* MSI */
+	{ USB_DEVICE(0x0db0, 0x6877), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x0db0, 0xa861), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x0db0, 0xa874), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Ralink */
+	{ USB_DEVICE(0x148f, 0x2573), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x148f, 0x2671), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Qcom */
+	{ USB_DEVICE(0x18e8, 0x6196), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x18e8, 0x6229), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Sitecom */
+	{ USB_DEVICE(0x0df6, 0x9712), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x0df6, 0x90ac), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Surecom */
+	{ USB_DEVICE(0x0769, 0x31f3), USB_DEVICE_DATA(&rt73usb_ops) },
+	/* Planex */
+	{ USB_DEVICE(0x2019, 0xab01), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x2019, 0xab50), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ 0, }
+};
+
+MODULE_AUTHOR(DRV_PROJECT);
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION("Ralink RT73 USB Wireless LAN driver.");
+MODULE_SUPPORTED_DEVICE("Ralink RT2571W & RT2671 USB chipset based cards");
+MODULE_DEVICE_TABLE(usb, rt73usb_device_table);
+MODULE_FIRMWARE(FIRMWARE_RT2571);
+MODULE_LICENSE("GPL");
+
+static struct usb_driver rt73usb_driver = {
+	.name		= DRV_NAME,
+	.id_table	= rt73usb_device_table,
+	.probe		= rt2x00usb_probe,
+	.disconnect	= rt2x00usb_disconnect,
+#ifdef CONFIG_PM
+	.suspend	= rt2x00usb_suspend,
+	.resume		= rt2x00usb_resume,
+#endif /* CONFIG_PM */
+};
+
+static int __init rt73usb_init(void)
+{
+	printk(KERN_INFO "Loading module: %s - %s by %s.\n",
+		DRV_NAME, DRV_VERSION, DRV_PROJECT);
+	return usb_register(&rt73usb_driver);
+}
+
+static void __exit rt73usb_exit(void)
+{
+	printk(KERN_INFO "Unloading module: %s.\n", DRV_NAME);
+	usb_deregister(&rt73usb_driver);
+}
+
+module_init(rt73usb_init);
+module_exit(rt73usb_exit);