/*
        Copyright (C) 2004 - 2009 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: rt2800usb
        Abstract: rt2800usb device specific routines.
        Supported chipsets: RT2800U.
 */

#include <linux/crc-ccitt.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "rt2x00.h"
#include "rt2x00usb.h"
#include "rt2800usb.h"

/*
 * Allow hardware encryption to be disabled.
 */
static int modparam_nohwcrypt = 1;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");

/*
 * Register access.
 * All access to the CSR registers will go through the methods
 * rt2x00usb_register_read and rt2x00usb_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.
 * The _lock versions must be used if you already hold the csr_mutex
 */
#define WAIT_FOR_BBP(__dev, __reg) \
        rt2x00usb_regbusy_read((__dev), BBP_CSR_CFG, BBP_CSR_CFG_BUSY, (__reg))
#define WAIT_FOR_RFCSR(__dev, __reg) \
        rt2x00usb_regbusy_read((__dev), RF_CSR_CFG, RF_CSR_CFG_BUSY, (__reg))
#define WAIT_FOR_RF(__dev, __reg) \
        rt2x00usb_regbusy_read((__dev), RF_CSR_CFG0, RF_CSR_CFG0_BUSY, (__reg))
#define WAIT_FOR_MCU(__dev, __reg) \
        rt2x00usb_regbusy_read((__dev), H2M_MAILBOX_CSR, \
                               H2M_MAILBOX_CSR_OWNER, (__reg))

static void rt2800usb_bbp_write(struct rt2x00_dev *rt2x00dev,
                                const unsigned int word, const u8 value)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the BBP becomes available, afterwards we
         * can safely write the new data into the register.
         */
        if (WAIT_FOR_BBP(rt2x00dev, &reg)) {
                reg = 0;
                rt2x00_set_field32(&reg, BBP_CSR_CFG_VALUE, value);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_REGNUM, word);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_BUSY, 1);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_READ_CONTROL, 0);

                rt2x00usb_register_write_lock(rt2x00dev, BBP_CSR_CFG, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800usb_bbp_read(struct rt2x00_dev *rt2x00dev,
                               const unsigned int word, u8 *value)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the BBP becomes available, afterwards we
         * can safely write the read request into the register.
         * After the data has been written, we wait until hardware
         * returns the correct value, if at any time the register
         * doesn't become available in time, reg will be 0xffffffff
         * which means we return 0xff to the caller.
         */
        if (WAIT_FOR_BBP(rt2x00dev, &reg)) {
                reg = 0;
                rt2x00_set_field32(&reg, BBP_CSR_CFG_REGNUM, word);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_BUSY, 1);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_READ_CONTROL, 1);

                rt2x00usb_register_write_lock(rt2x00dev, BBP_CSR_CFG, reg);

                WAIT_FOR_BBP(rt2x00dev, &reg);
        }

        *value = rt2x00_get_field32(reg, BBP_CSR_CFG_VALUE);

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800usb_rfcsr_write(struct rt2x00_dev *rt2x00dev,
                                  const unsigned int word, const u8 value)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the RFCSR becomes available, afterwards we
         * can safely write the new data into the register.
         */
        if (WAIT_FOR_RFCSR(rt2x00dev, &reg)) {
                reg = 0;
                rt2x00_set_field32(&reg, RF_CSR_CFG_DATA, value);
                rt2x00_set_field32(&reg, RF_CSR_CFG_REGNUM, word);
                rt2x00_set_field32(&reg, RF_CSR_CFG_WRITE, 1);
                rt2x00_set_field32(&reg, RF_CSR_CFG_BUSY, 1);

                rt2x00usb_register_write_lock(rt2x00dev, RF_CSR_CFG, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800usb_rfcsr_read(struct rt2x00_dev *rt2x00dev,
                                 const unsigned int word, u8 *value)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the RFCSR becomes available, afterwards we
         * can safely write the read request into the register.
         * After the data has been written, we wait until hardware
         * returns the correct value, if at any time the register
         * doesn't become available in time, reg will be 0xffffffff
         * which means we return 0xff to the caller.
         */
        if (WAIT_FOR_RFCSR(rt2x00dev, &reg)) {
                reg = 0;
                rt2x00_set_field32(&reg, RF_CSR_CFG_REGNUM, word);
                rt2x00_set_field32(&reg, RF_CSR_CFG_WRITE, 0);
                rt2x00_set_field32(&reg, RF_CSR_CFG_BUSY, 1);

                rt2x00usb_register_write_lock(rt2x00dev, BBP_CSR_CFG, reg);

                WAIT_FOR_RFCSR(rt2x00dev, &reg);
        }

        *value = rt2x00_get_field32(reg, RF_CSR_CFG_DATA);

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800usb_rf_write(struct rt2x00_dev *rt2x00dev,
                               const unsigned int word, const u32 value)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the RF becomes available, afterwards we
         * can safely write the new data into the register.
         */
        if (WAIT_FOR_RF(rt2x00dev, &reg)) {
                reg = 0;
                rt2x00_set_field32(&reg, RF_CSR_CFG0_REG_VALUE_BW, value);
                rt2x00_set_field32(&reg, RF_CSR_CFG0_STANDBYMODE, 0);
                rt2x00_set_field32(&reg, RF_CSR_CFG0_SEL, 0);
                rt2x00_set_field32(&reg, RF_CSR_CFG0_BUSY, 1);

                rt2x00usb_register_write_lock(rt2x00dev, RF_CSR_CFG0, reg);
                rt2x00_rf_write(rt2x00dev, word, value);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800usb_mcu_request(struct rt2x00_dev *rt2x00dev,
                                  const u8 command, const u8 token,
                                  const u8 arg0, const u8 arg1)
{
        u32 reg;

        mutex_lock(&rt2x00dev->csr_mutex);

        /*
         * Wait until the MCU becomes available, afterwards we
         * can safely write the new data into the register.
         */
        if (WAIT_FOR_MCU(rt2x00dev, &reg)) {
                rt2x00_set_field32(&reg, H2M_MAILBOX_CSR_OWNER, 1);
                rt2x00_set_field32(&reg, H2M_MAILBOX_CSR_CMD_TOKEN, token);
                rt2x00_set_field32(&reg, H2M_MAILBOX_CSR_ARG0, arg0);
                rt2x00_set_field32(&reg, H2M_MAILBOX_CSR_ARG1, arg1);
                rt2x00usb_register_write_lock(rt2x00dev, H2M_MAILBOX_CSR, reg);

                reg = 0;
                rt2x00_set_field32(&reg, HOST_CMD_CSR_HOST_COMMAND, command);
                rt2x00usb_register_write_lock(rt2x00dev, HOST_CMD_CSR, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

#ifdef CONFIG_RT2X00_LIB_DEBUGFS
static const struct rt2x00debug rt2800usb_rt2x00debug = {
        .owner  = THIS_MODULE,
        .csr    = {
                .read           = rt2x00usb_register_read,
                .write          = rt2x00usb_register_write,
                .flags          = RT2X00DEBUGFS_OFFSET,
                .word_base      = CSR_REG_BASE,
                .word_size      = sizeof(u32),
                .word_count     = CSR_REG_SIZE / sizeof(u32),
        },
        .eeprom = {
                .read           = rt2x00_eeprom_read,
                .write          = rt2x00_eeprom_write,
                .word_base      = EEPROM_BASE,
                .word_size      = sizeof(u16),
                .word_count     = EEPROM_SIZE / sizeof(u16),
        },
        .bbp    = {
                .read           = rt2800usb_bbp_read,
                .write          = rt2800usb_bbp_write,
                .word_base      = BBP_BASE,
                .word_size      = sizeof(u8),
                .word_count     = BBP_SIZE / sizeof(u8),
        },
        .rf     = {
                .read           = rt2x00_rf_read,
                .write          = rt2800usb_rf_write,
                .word_base      = RF_BASE,
                .word_size      = sizeof(u32),
                .word_count     = RF_SIZE / sizeof(u32),
        },
};
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */

static int rt2800usb_rfkill_poll(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, GPIO_CTRL_CFG, &reg);
        return rt2x00_get_field32(reg, GPIO_CTRL_CFG_BIT2);
}

#ifdef CONFIG_RT2X00_LIB_LEDS
static void rt2800usb_brightness_set(struct led_classdev *led_cdev,
                                     enum led_brightness brightness)
{
        struct rt2x00_led *led =
            container_of(led_cdev, struct rt2x00_led, led_dev);
        unsigned int enabled = brightness != LED_OFF;
        unsigned int bg_mode =
            (enabled && led->rt2x00dev->curr_band == IEEE80211_BAND_2GHZ);
        unsigned int polarity =
                rt2x00_get_field16(led->rt2x00dev->led_mcu_reg,
                                   EEPROM_FREQ_LED_POLARITY);
        unsigned int ledmode =
                rt2x00_get_field16(led->rt2x00dev->led_mcu_reg,
                                   EEPROM_FREQ_LED_MODE);

        if (led->type == LED_TYPE_RADIO) {
                rt2800usb_mcu_request(led->rt2x00dev, MCU_LED, 0xff, ledmode,
                                      enabled ? 0x20 : 0);
        } else if (led->type == LED_TYPE_ASSOC) {
                rt2800usb_mcu_request(led->rt2x00dev, MCU_LED, 0xff, ledmode,
                                      enabled ? (bg_mode ? 0x60 : 0xa0) : 0x20);
        } else if (led->type == LED_TYPE_QUALITY) {
                /*
                 * The brightness is divided into 6 levels (0 - 5),
                 * The specs tell us the following levels:
                 *      0, 1 ,3, 7, 15, 31
                 * to determine the level in a simple way we can simply
                 * work with bitshifting:
                 *      (1 << level) - 1
                 */
                rt2800usb_mcu_request(led->rt2x00dev, MCU_LED_STRENGTH, 0xff,
                                      (1 << brightness / (LED_FULL / 6)) - 1,
                                      polarity);
        }
}

static int rt2800usb_blink_set(struct led_classdev *led_cdev,
                               unsigned long *delay_on,
                               unsigned long *delay_off)
{
        struct rt2x00_led *led =
            container_of(led_cdev, struct rt2x00_led, led_dev);
        u32 reg;

        rt2x00usb_register_read(led->rt2x00dev, LED_CFG, &reg);
        rt2x00_set_field32(&reg, LED_CFG_ON_PERIOD, *delay_on);
        rt2x00_set_field32(&reg, LED_CFG_OFF_PERIOD, *delay_off);
        rt2x00_set_field32(&reg, LED_CFG_SLOW_BLINK_PERIOD, 3);
        rt2x00_set_field32(&reg, LED_CFG_R_LED_MODE, 3);
        rt2x00_set_field32(&reg, LED_CFG_G_LED_MODE, 12);
        rt2x00_set_field32(&reg, LED_CFG_Y_LED_MODE, 3);
        rt2x00_set_field32(&reg, LED_CFG_LED_POLAR, 1);
        rt2x00usb_register_write(led->rt2x00dev, LED_CFG, reg);

        return 0;
}

static void rt2800usb_init_led(struct rt2x00_dev *rt2x00dev,
                               struct rt2x00_led *led,
                               enum led_type type)
{
        led->rt2x00dev = rt2x00dev;
        led->type = type;
        led->led_dev.brightness_set = rt2800usb_brightness_set;
        led->led_dev.blink_set = rt2800usb_blink_set;
        led->flags = LED_INITIALIZED;
}
#endif /* CONFIG_RT2X00_LIB_LEDS */

/*
 * Configuration handlers.
 */
static void rt2800usb_config_wcid_attr(struct rt2x00_dev *rt2x00dev,
                                       struct rt2x00lib_crypto *crypto,
                                       struct ieee80211_key_conf *key)
{
        struct mac_wcid_entry wcid_entry;
        struct mac_iveiv_entry iveiv_entry;
        u32 offset;
        u32 reg;

        offset = MAC_WCID_ATTR_ENTRY(key->hw_key_idx);

        rt2x00usb_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_KEYTAB,
                           !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER,
                           (crypto->cmd == SET_KEY) * crypto->cipher);
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX,
                           (crypto->cmd == SET_KEY) * crypto->bssidx);
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_RX_WIUDF, crypto->cipher);
        rt2x00usb_register_write(rt2x00dev, offset, reg);

        offset = MAC_IVEIV_ENTRY(key->hw_key_idx);

        memset(&iveiv_entry, 0, sizeof(iveiv_entry));
        if ((crypto->cipher == CIPHER_TKIP) ||
            (crypto->cipher == CIPHER_TKIP_NO_MIC) ||
            (crypto->cipher == CIPHER_AES))
                iveiv_entry.iv[3] |= 0x20;
        iveiv_entry.iv[3] |= key->keyidx << 6;
        rt2x00usb_register_multiwrite(rt2x00dev, offset,
                                      &iveiv_entry, sizeof(iveiv_entry));

        offset = MAC_WCID_ENTRY(key->hw_key_idx);

        memset(&wcid_entry, 0, sizeof(wcid_entry));
        if (crypto->cmd == SET_KEY)
                memcpy(&wcid_entry, crypto->address, ETH_ALEN);
        rt2x00usb_register_multiwrite(rt2x00dev, offset,
                                      &wcid_entry, sizeof(wcid_entry));
}

static int rt2800usb_config_shared_key(struct rt2x00_dev *rt2x00dev,
                                       struct rt2x00lib_crypto *crypto,
                                       struct ieee80211_key_conf *key)
{
        struct hw_key_entry key_entry;
        struct rt2x00_field32 field;
        int timeout;
        u32 offset;
        u32 reg;

        if (crypto->cmd == SET_KEY) {
                key->hw_key_idx = (4 * crypto->bssidx) + key->keyidx;

                memcpy(key_entry.key, crypto->key,
                       sizeof(key_entry.key));
                memcpy(key_entry.tx_mic, crypto->tx_mic,
                       sizeof(key_entry.tx_mic));
                memcpy(key_entry.rx_mic, crypto->rx_mic,
                       sizeof(key_entry.rx_mic));

                offset = SHARED_KEY_ENTRY(key->hw_key_idx);
                timeout = REGISTER_TIMEOUT32(sizeof(key_entry));
                rt2x00usb_vendor_request_large_buff(rt2x00dev, USB_MULTI_WRITE,
                                                    USB_VENDOR_REQUEST_OUT,
                                                    offset, &key_entry,
                                                    sizeof(key_entry),
                                                    timeout);
        }

        /*
         * The cipher types are stored over multiple registers
         * starting with SHARED_KEY_MODE_BASE each word will have
         * 32 bits and contains the cipher types for 2 bssidx each.
         * Using the correct defines correctly will cause overhead,
         * so just calculate the correct offset.
         */
        field.bit_offset = 4 * (key->hw_key_idx % 8);
        field.bit_mask = 0x7 << field.bit_offset;

        offset = SHARED_KEY_MODE_ENTRY(key->hw_key_idx / 8);

        rt2x00usb_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, field,
                           (crypto->cmd == SET_KEY) * crypto->cipher);
        rt2x00usb_register_write(rt2x00dev, offset, reg);

        /*
         * Update WCID information
         */
        rt2800usb_config_wcid_attr(rt2x00dev, crypto, key);

        return 0;
}

static int rt2800usb_config_pairwise_key(struct rt2x00_dev *rt2x00dev,
                                         struct rt2x00lib_crypto *crypto,
                                         struct ieee80211_key_conf *key)
{
        struct hw_key_entry key_entry;
        int timeout;
        u32 offset;

        if (crypto->cmd == SET_KEY) {
                /*
                 * 1 pairwise key is possible per AID, this means that the AID
                 * equals our hw_key_idx. Make sure the WCID starts _after_ the
                 * last possible shared key entry.
                 */
                if (crypto->aid > (256 - 32))
                        return -ENOSPC;

                key->hw_key_idx = 32 + crypto->aid;

                memcpy(key_entry.key, crypto->key,
                       sizeof(key_entry.key));
                memcpy(key_entry.tx_mic, crypto->tx_mic,
                       sizeof(key_entry.tx_mic));
                memcpy(key_entry.rx_mic, crypto->rx_mic,
                       sizeof(key_entry.rx_mic));

                offset = PAIRWISE_KEY_ENTRY(key->hw_key_idx);
                timeout = REGISTER_TIMEOUT32(sizeof(key_entry));
                rt2x00usb_vendor_request_large_buff(rt2x00dev, USB_MULTI_WRITE,
                                                    USB_VENDOR_REQUEST_OUT,
                                                    offset, &key_entry,
                                                    sizeof(key_entry),
                                                    timeout);
        }

        /*
         * Update WCID information
         */
        rt2800usb_config_wcid_attr(rt2x00dev, crypto, key);

        return 0;
}

static void rt2800usb_config_filter(struct rt2x00_dev *rt2x00dev,
                                    const unsigned int filter_flags)
{
        u32 reg;

        /*
         * Start configuration steps.
         * Note that the version error will always be dropped
         * and broadcast frames will always be accepted since
         * there is no filter for it at this time.
         */
        rt2x00usb_register_read(rt2x00dev, RX_FILTER_CFG, &reg);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CRC_ERROR,
                           !(filter_flags & FIF_FCSFAIL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_PHY_ERROR,
                           !(filter_flags & FIF_PLCPFAIL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_NOT_TO_ME,
                           !(filter_flags & FIF_PROMISC_IN_BSS));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_NOT_MY_BSSD, 0);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_VER_ERROR, 1);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_MULTICAST,
                           !(filter_flags & FIF_ALLMULTI));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_BROADCAST, 0);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_DUPLICATE, 1);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CF_END_ACK,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CF_END,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_ACK,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CTS,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_RTS,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_PSPOLL,
                           !(filter_flags & FIF_PSPOLL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_BA, 1);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_BAR, 0);
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CNTL,
                           !(filter_flags & FIF_CONTROL));
        rt2x00usb_register_write(rt2x00dev, RX_FILTER_CFG, reg);
}

static void rt2800usb_config_intf(struct rt2x00_dev *rt2x00dev,
                                  struct rt2x00_intf *intf,
                                  struct rt2x00intf_conf *conf,
                                  const unsigned int flags)
{
        unsigned int beacon_base;
        u32 reg;

        if (flags & CONFIG_UPDATE_TYPE) {
                /*
                 * Clear current synchronisation setup.
                 * For the Beacon base registers we only need to clear
                 * the first byte since that byte contains the VALID and OWNER
                 * bits which (when set to 0) will invalidate the entire beacon.
                 */
                beacon_base = HW_BEACON_OFFSET(intf->beacon->entry_idx);
                rt2x00usb_register_write(rt2x00dev, beacon_base, 0);

                /*
                 * Enable synchronisation.
                 */
                rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_SYNC, conf->sync);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 1);
                rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);
        }

        if (flags & CONFIG_UPDATE_MAC) {
                reg = le32_to_cpu(conf->mac[1]);
                rt2x00_set_field32(&reg, MAC_ADDR_DW1_UNICAST_TO_ME_MASK, 0xff);
                conf->mac[1] = cpu_to_le32(reg);

                rt2x00usb_register_multiwrite(rt2x00dev, MAC_ADDR_DW0,
                                              conf->mac, sizeof(conf->mac));
        }

        if (flags & CONFIG_UPDATE_BSSID) {
                reg = le32_to_cpu(conf->bssid[1]);
                rt2x00_set_field32(&reg, MAC_BSSID_DW1_BSS_ID_MASK, 0);
                rt2x00_set_field32(&reg, MAC_BSSID_DW1_BSS_BCN_NUM, 0);
                conf->bssid[1] = cpu_to_le32(reg);

                rt2x00usb_register_multiwrite(rt2x00dev, MAC_BSSID_DW0,
                                              conf->bssid, sizeof(conf->bssid));
        }
}

static void rt2800usb_config_erp(struct rt2x00_dev *rt2x00dev,
                                 struct rt2x00lib_erp *erp)
{
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, TX_TIMEOUT_CFG, &reg);
        rt2x00_set_field32(&reg, TX_TIMEOUT_CFG_RX_ACK_TIMEOUT, 0x20);
        rt2x00usb_register_write(rt2x00dev, TX_TIMEOUT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, AUTO_RSP_CFG, &reg);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_BAC_ACK_POLICY,
                           !!erp->short_preamble);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_AR_PREAMBLE,
                           !!erp->short_preamble);
        rt2x00usb_register_write(rt2x00dev, AUTO_RSP_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, OFDM_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_PROTECT_CTRL,
                           erp->cts_protection ? 2 : 0);
        rt2x00usb_register_write(rt2x00dev, OFDM_PROT_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, LEGACY_BASIC_RATE,
                                 erp->basic_rates);
        rt2x00usb_register_write(rt2x00dev, HT_BASIC_RATE, 0x00008003);

        rt2x00usb_register_read(rt2x00dev, BKOFF_SLOT_CFG, &reg);
        rt2x00_set_field32(&reg, BKOFF_SLOT_CFG_SLOT_TIME, erp->slot_time);
        rt2x00_set_field32(&reg, BKOFF_SLOT_CFG_CC_DELAY_TIME, 2);
        rt2x00usb_register_write(rt2x00dev, BKOFF_SLOT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, XIFS_TIME_CFG, &reg);
        rt2x00_set_field32(&reg, XIFS_TIME_CFG_CCKM_SIFS_TIME, erp->sifs);
        rt2x00_set_field32(&reg, XIFS_TIME_CFG_OFDM_SIFS_TIME, erp->sifs);
        rt2x00_set_field32(&reg, XIFS_TIME_CFG_OFDM_XIFS_TIME, 4);
        rt2x00_set_field32(&reg, XIFS_TIME_CFG_EIFS, erp->eifs);
        rt2x00_set_field32(&reg, XIFS_TIME_CFG_BB_RXEND_ENABLE, 1);
        rt2x00usb_register_write(rt2x00dev, XIFS_TIME_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_INTERVAL,
                           erp->beacon_int * 16);
        rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);
}

static void rt2800usb_config_ant(struct rt2x00_dev *rt2x00dev,
                                 struct antenna_setup *ant)
{
        u8 r1;
        u8 r3;

        rt2800usb_bbp_read(rt2x00dev, 1, &r1);
        rt2800usb_bbp_read(rt2x00dev, 3, &r3);

        /*
         * Configure the TX antenna.
         */
        switch ((int)ant->tx) {
        case 1:
                rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 0);
                break;
        case 2:
                rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 2);
                break;
        case 3:
                /* Do nothing */
                break;
        }

        /*
         * Configure the RX antenna.
         */
        switch ((int)ant->rx) {
        case 1:
                rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 0);
                break;
        case 2:
                rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 1);
                break;
        case 3:
                rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 2);
                break;
        }

        rt2800usb_bbp_write(rt2x00dev, 3, r3);
        rt2800usb_bbp_write(rt2x00dev, 1, r1);
}

static void rt2800usb_config_lna_gain(struct rt2x00_dev *rt2x00dev,
                                      struct rt2x00lib_conf *libconf)
{
        u16 eeprom;
        short lna_gain;

        if (libconf->rf.channel <= 14) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_LNA, &eeprom);
                lna_gain = rt2x00_get_field16(eeprom, EEPROM_LNA_BG);
        } else if (libconf->rf.channel <= 64) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_LNA, &eeprom);
                lna_gain = rt2x00_get_field16(eeprom, EEPROM_LNA_A0);
        } else if (libconf->rf.channel <= 128) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG2, &eeprom);
                lna_gain = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG2_LNA_A1);
        } else {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_A2, &eeprom);
                lna_gain = rt2x00_get_field16(eeprom, EEPROM_RSSI_A2_LNA_A2);
        }

        rt2x00dev->lna_gain = lna_gain;
}

static void rt2800usb_config_channel_rt2x(struct rt2x00_dev *rt2x00dev,
                                          struct ieee80211_conf *conf,
                                          struct rf_channel *rf,
                                          struct channel_info *info)
{
        rt2x00_set_field32(&rf->rf4, RF4_FREQ_OFFSET, rt2x00dev->freq_offset);

        if (rt2x00dev->default_ant.tx == 1)
                rt2x00_set_field32(&rf->rf2, RF2_ANTENNA_TX1, 1);

        if (rt2x00dev->default_ant.rx == 1) {
                rt2x00_set_field32(&rf->rf2, RF2_ANTENNA_RX1, 1);
                rt2x00_set_field32(&rf->rf2, RF2_ANTENNA_RX2, 1);
        } else if (rt2x00dev->default_ant.rx == 2)
                rt2x00_set_field32(&rf->rf2, RF2_ANTENNA_RX2, 1);

        if (rf->channel > 14) {
                /*
                 * When TX power is below 0, we should increase it by 7 to
                 * make it a positive value (Minumum value is -7).
                 * However this means that values between 0 and 7 have
                 * double meaning, and we should set a 7DBm boost flag.
                 */
                rt2x00_set_field32(&rf->rf3, RF3_TXPOWER_A_7DBM_BOOST,
                                   (info->tx_power1 >= 0));

                if (info->tx_power1 < 0)
                        info->tx_power1 += 7;

                rt2x00_set_field32(&rf->rf3, RF3_TXPOWER_A,
                                   TXPOWER_A_TO_DEV(info->tx_power1));

                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_A_7DBM_BOOST,
                                   (info->tx_power2 >= 0));

                if (info->tx_power2 < 0)
                        info->tx_power2 += 7;

                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_A,
                                   TXPOWER_A_TO_DEV(info->tx_power2));
        } else {
                rt2x00_set_field32(&rf->rf3, RF3_TXPOWER_G,
                                   TXPOWER_G_TO_DEV(info->tx_power1));
                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_G,
                                   TXPOWER_G_TO_DEV(info->tx_power2));
        }

        rt2x00_set_field32(&rf->rf4, RF4_HT40, conf_is_ht40(conf));

        rt2800usb_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800usb_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800usb_rf_write(rt2x00dev, 3, rf->rf3 & ~0x00000004);
        rt2800usb_rf_write(rt2x00dev, 4, rf->rf4);

        udelay(200);

        rt2800usb_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800usb_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800usb_rf_write(rt2x00dev, 3, rf->rf3 | 0x00000004);
        rt2800usb_rf_write(rt2x00dev, 4, rf->rf4);

        udelay(200);

        rt2800usb_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800usb_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800usb_rf_write(rt2x00dev, 3, rf->rf3 & ~0x00000004);
        rt2800usb_rf_write(rt2x00dev, 4, rf->rf4);
}

static void rt2800usb_config_channel_rt3x(struct rt2x00_dev *rt2x00dev,
                                          struct ieee80211_conf *conf,
                                          struct rf_channel *rf,
                                          struct channel_info *info)
{
        u8 rfcsr;

        rt2800usb_rfcsr_write(rt2x00dev, 2, rf->rf1);
        rt2800usb_rfcsr_write(rt2x00dev, 2, rf->rf3);

        rt2800usb_rfcsr_read(rt2x00dev, 6, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR6_R, rf->rf2);
        rt2800usb_rfcsr_write(rt2x00dev, 6, rfcsr);

        rt2800usb_rfcsr_read(rt2x00dev, 12, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR12_TX_POWER,
                          TXPOWER_G_TO_DEV(info->tx_power1));
        rt2800usb_rfcsr_write(rt2x00dev, 12, rfcsr);

        rt2800usb_rfcsr_read(rt2x00dev, 23, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR23_FREQ_OFFSET, rt2x00dev->freq_offset);
        rt2800usb_rfcsr_write(rt2x00dev, 23, rfcsr);

        rt2800usb_rfcsr_write(rt2x00dev, 24,
                              rt2x00dev->calibration[conf_is_ht40(conf)]);

        rt2800usb_rfcsr_read(rt2x00dev, 23, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1);
        rt2800usb_rfcsr_write(rt2x00dev, 23, rfcsr);
}

static void rt2800usb_config_channel(struct rt2x00_dev *rt2x00dev,
                                     struct ieee80211_conf *conf,
                                     struct rf_channel *rf,
                                     struct channel_info *info)
{
        u32 reg;
        unsigned int tx_pin;
        u8 bbp;

        if (rt2x00_rev(&rt2x00dev->chip) != RT3070_VERSION)
                rt2800usb_config_channel_rt2x(rt2x00dev, conf, rf, info);
        else
                rt2800usb_config_channel_rt3x(rt2x00dev, conf, rf, info);

        /*
         * Change BBP settings
         */
        rt2800usb_bbp_write(rt2x00dev, 62, 0x37 - rt2x00dev->lna_gain);
        rt2800usb_bbp_write(rt2x00dev, 63, 0x37 - rt2x00dev->lna_gain);
        rt2800usb_bbp_write(rt2x00dev, 64, 0x37 - rt2x00dev->lna_gain);
        rt2800usb_bbp_write(rt2x00dev, 86, 0);

        if (rf->channel <= 14) {
                if (test_bit(CONFIG_EXTERNAL_LNA_BG, &rt2x00dev->flags)) {
                        rt2800usb_bbp_write(rt2x00dev, 82, 0x62);
                        rt2800usb_bbp_write(rt2x00dev, 75, 0x46);
                } else {
                        rt2800usb_bbp_write(rt2x00dev, 82, 0x84);
                        rt2800usb_bbp_write(rt2x00dev, 75, 0x50);
                }
        } else {
                rt2800usb_bbp_write(rt2x00dev, 82, 0xf2);

                if (test_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags))
                        rt2800usb_bbp_write(rt2x00dev, 75, 0x46);
                else
                        rt2800usb_bbp_write(rt2x00dev, 75, 0x50);
        }

        rt2x00usb_register_read(rt2x00dev, TX_BAND_CFG, &reg);
        rt2x00_set_field32(&reg, TX_BAND_CFG_HT40_PLUS, conf_is_ht40_plus(conf));
        rt2x00_set_field32(&reg, TX_BAND_CFG_A, rf->channel > 14);
        rt2x00_set_field32(&reg, TX_BAND_CFG_BG, rf->channel <= 14);
        rt2x00usb_register_write(rt2x00dev, TX_BAND_CFG, reg);

        tx_pin = 0;

        /* Turn on unused PA or LNA when not using 1T or 1R */
        if (rt2x00dev->default_ant.tx != 1) {
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A1_EN, 1);
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G1_EN, 1);
        }

        /* Turn on unused PA or LNA when not using 1T or 1R */
        if (rt2x00dev->default_ant.rx != 1) {
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A1_EN, 1);
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G1_EN, 1);
        }

        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_A0_EN, 1);
        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_LNA_PE_G0_EN, 1);
        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_RFTR_EN, 1);
        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_TRSW_EN, 1);
        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G0_EN, rf->channel <= 14);
        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A0_EN, rf->channel > 14);

        rt2x00usb_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);

        rt2800usb_bbp_read(rt2x00dev, 4, &bbp);
        rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 2 * conf_is_ht40(conf));
        rt2800usb_bbp_write(rt2x00dev, 4, bbp);

        rt2800usb_bbp_read(rt2x00dev, 3, &bbp);
        rt2x00_set_field8(&bbp, BBP3_HT40_PLUS, conf_is_ht40_plus(conf));
        rt2800usb_bbp_write(rt2x00dev, 3, bbp);

        if (rt2x00_rev(&rt2x00dev->chip) == RT2860C_VERSION) {
                if (conf_is_ht40(conf)) {
                        rt2800usb_bbp_write(rt2x00dev, 69, 0x1a);
                        rt2800usb_bbp_write(rt2x00dev, 70, 0x0a);
                        rt2800usb_bbp_write(rt2x00dev, 73, 0x16);
                } else {
                        rt2800usb_bbp_write(rt2x00dev, 69, 0x16);
                        rt2800usb_bbp_write(rt2x00dev, 70, 0x08);
                        rt2800usb_bbp_write(rt2x00dev, 73, 0x11);
                }
        }

        msleep(1);
}

static void rt2800usb_config_txpower(struct rt2x00_dev *rt2x00dev,
                                     const int txpower)
{
        u32 reg;
        u32 value = TXPOWER_G_TO_DEV(txpower);
        u8 r1;

        rt2800usb_bbp_read(rt2x00dev, 1, &r1);
        rt2x00_set_field8(&reg, BBP1_TX_POWER, 0);
        rt2800usb_bbp_write(rt2x00dev, 1, r1);

        rt2x00usb_register_read(rt2x00dev, TX_PWR_CFG_0, &reg);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_1MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_2MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_55MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_11MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_6MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_9MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_12MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_0_18MBS, value);
        rt2x00usb_register_write(rt2x00dev, TX_PWR_CFG_0, reg);

        rt2x00usb_register_read(rt2x00dev, TX_PWR_CFG_1, &reg);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_24MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_36MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_48MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_54MBS, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_MCS0, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_MCS1, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_MCS2, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_1_MCS3, value);
        rt2x00usb_register_write(rt2x00dev, TX_PWR_CFG_1, reg);

        rt2x00usb_register_read(rt2x00dev, TX_PWR_CFG_2, &reg);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS4, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS5, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS6, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS7, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS8, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS9, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS10, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_2_MCS11, value);
        rt2x00usb_register_write(rt2x00dev, TX_PWR_CFG_2, reg);

        rt2x00usb_register_read(rt2x00dev, TX_PWR_CFG_3, &reg);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_MCS12, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_MCS13, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_MCS14, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_MCS15, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_UKNOWN1, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_UKNOWN2, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_UKNOWN3, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_3_UKNOWN4, value);
        rt2x00usb_register_write(rt2x00dev, TX_PWR_CFG_3, reg);

        rt2x00usb_register_read(rt2x00dev, TX_PWR_CFG_4, &reg);
        rt2x00_set_field32(&reg, TX_PWR_CFG_4_UKNOWN5, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_4_UKNOWN6, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_4_UKNOWN7, value);
        rt2x00_set_field32(&reg, TX_PWR_CFG_4_UKNOWN8, value);
        rt2x00usb_register_write(rt2x00dev, TX_PWR_CFG_4, reg);
}

static void rt2800usb_config_retry_limit(struct rt2x00_dev *rt2x00dev,
                                         struct rt2x00lib_conf *libconf)
{
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, TX_RTY_CFG, &reg);
        rt2x00_set_field32(&reg, TX_RTY_CFG_SHORT_RTY_LIMIT,
                           libconf->conf->short_frame_max_tx_count);
        rt2x00_set_field32(&reg, TX_RTY_CFG_LONG_RTY_LIMIT,
                           libconf->conf->long_frame_max_tx_count);
        rt2x00_set_field32(&reg, TX_RTY_CFG_LONG_RTY_THRE, 2000);
        rt2x00_set_field32(&reg, TX_RTY_CFG_NON_AGG_RTY_MODE, 0);
        rt2x00_set_field32(&reg, TX_RTY_CFG_AGG_RTY_MODE, 0);
        rt2x00_set_field32(&reg, TX_RTY_CFG_TX_AUTO_FB_ENABLE, 1);
        rt2x00usb_register_write(rt2x00dev, TX_RTY_CFG, reg);
}

static void rt2800usb_config_ps(struct rt2x00_dev *rt2x00dev,
                                struct rt2x00lib_conf *libconf)
{
        enum dev_state state =
            (libconf->conf->flags & IEEE80211_CONF_PS) ?
                STATE_SLEEP : STATE_AWAKE;
        u32 reg;

        if (state == STATE_SLEEP) {
                rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, 0);

                rt2x00usb_register_read(rt2x00dev, AUTOWAKEUP_CFG, &reg);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_AUTO_LEAD_TIME, 5);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_TBCN_BEFORE_WAKE,
                                   libconf->conf->listen_interval - 1);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_AUTOWAKE, 1);
                rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);

                rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
        } else {
                rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);

                rt2x00usb_register_read(rt2x00dev, AUTOWAKEUP_CFG, &reg);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_AUTO_LEAD_TIME, 0);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_TBCN_BEFORE_WAKE, 0);
                rt2x00_set_field32(&reg, AUTOWAKEUP_CFG_AUTOWAKE, 0);
                rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);
        }
}

static void rt2800usb_config(struct rt2x00_dev *rt2x00dev,
                             struct rt2x00lib_conf *libconf,
                             const unsigned int flags)
{
        /* Always recalculate LNA gain before changing configuration */
        rt2800usb_config_lna_gain(rt2x00dev, libconf);

        if (flags & IEEE80211_CONF_CHANGE_CHANNEL)
                rt2800usb_config_channel(rt2x00dev, libconf->conf,
                                         &libconf->rf, &libconf->channel);
        if (flags & IEEE80211_CONF_CHANGE_POWER)
                rt2800usb_config_txpower(rt2x00dev, libconf->conf->power_level);
        if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS)

                rt2800usb_config_retry_limit(rt2x00dev, libconf);
        if (flags & IEEE80211_CONF_CHANGE_PS)
                rt2800usb_config_ps(rt2x00dev, libconf);
}

/*
 * Link tuning
 */
static void rt2800usb_link_stats(struct rt2x00_dev *rt2x00dev,
                                 struct link_qual *qual)
{
        u32 reg;

        /*
         * Update FCS error count from register.
         */
        rt2x00usb_register_read(rt2x00dev, RX_STA_CNT0, &reg);
        qual->rx_failed = rt2x00_get_field32(reg, RX_STA_CNT0_CRC_ERR);
}

static u8 rt2800usb_get_default_vgc(struct rt2x00_dev *rt2x00dev)
{
        if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
                if (rt2x00_rev(&rt2x00dev->chip) == RT3070_VERSION)
                        return 0x1c + (2 * rt2x00dev->lna_gain);
                else
                        return 0x2e + rt2x00dev->lna_gain;
        }

        if (!test_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags))
                return 0x32 + (rt2x00dev->lna_gain * 5) / 3;
        else
                return 0x3a + (rt2x00dev->lna_gain * 5) / 3;
}

static inline void rt2800usb_set_vgc(struct rt2x00_dev *rt2x00dev,
                                     struct link_qual *qual, u8 vgc_level)
{
        if (qual->vgc_level != vgc_level) {
                rt2800usb_bbp_write(rt2x00dev, 66, vgc_level);
                qual->vgc_level = vgc_level;
                qual->vgc_level_reg = vgc_level;
        }
}

static void rt2800usb_reset_tuner(struct rt2x00_dev *rt2x00dev,
                                  struct link_qual *qual)
{
        rt2800usb_set_vgc(rt2x00dev, qual,
                          rt2800usb_get_default_vgc(rt2x00dev));
}

static void rt2800usb_link_tuner(struct rt2x00_dev *rt2x00dev,
                                 struct link_qual *qual, const u32 count)
{
        if (rt2x00_rev(&rt2x00dev->chip) == RT2860C_VERSION)
                return;

        /*
         * When RSSI is better then -80 increase VGC level with 0x10
         */
        rt2800usb_set_vgc(rt2x00dev, qual,
                          rt2800usb_get_default_vgc(rt2x00dev) +
                          ((qual->rssi > -80) * 0x10));
}

/*
 * Firmware functions
 */
static char *rt2800usb_get_firmware_name(struct rt2x00_dev *rt2x00dev)
{
        return FIRMWARE_RT2870;
}

static bool rt2800usb_check_crc(const u8 *data, const size_t len)
{
        u16 fw_crc;
        u16 crc;

        /*
         * The last 2 bytes in the firmware array are the crc checksum itself,
         * this means that we should never pass those 2 bytes to the crc
         * algorithm.
         */
        fw_crc = (data[len - 2] << 8 | data[len - 1]);

        /*
         * Use the crc ccitt algorithm.
         * This will return the same value as the legacy driver which
         * used bit ordering reversion on the both the firmware bytes
         * before input input as well as on the final output.
         * Obviously using crc ccitt directly is much more efficient.
         */
        crc = crc_ccitt(~0, data, len - 2);

        /*
         * There is a small difference between the crc-itu-t + bitrev and
         * the crc-ccitt crc calculation. In the latter method the 2 bytes
         * will be swapped, use swab16 to convert the crc to the correct
         * value.
         */
        crc = swab16(crc);

        return fw_crc == crc;
}

static int rt2800usb_check_firmware(struct rt2x00_dev *rt2x00dev,
                                    const u8 *data, const size_t len)
{
        u16 chipset = (rt2x00_rev(&rt2x00dev->chip) >> 16) & 0xffff;
        size_t offset = 0;

        /*
         * Firmware files:
         * There are 2 variations of the rt2870 firmware.
         * a) size: 4kb
         * b) size: 8kb
         * Note that (b) contains 2 seperate firmware blobs of 4k
         * within the file. The first blob is the same firmware as (a),
         * but the second blob is for the additional chipsets.
         */
        if (len != 4096 && len != 8192)
                return FW_BAD_LENGTH;

        /*
         * Check if we need the upper 4kb firmware data or not.
         */
        if ((len == 4096) &&
            (chipset != 0x2860) &&
            (chipset != 0x2872) &&
            (chipset != 0x3070))
                return FW_BAD_VERSION;

        /*
         * 8kb firmware files must be checked as if it were
         * 2 seperate firmware files.
         */
        while (offset < len) {
                if (!rt2800usb_check_crc(data + offset, 4096))
                        return FW_BAD_CRC;

                offset += 4096;
        }

        return FW_OK;
}

static int rt2800usb_load_firmware(struct rt2x00_dev *rt2x00dev,
                                   const u8 *data, const size_t len)
{
        unsigned int i;
        int status;
        u32 reg;
        u32 offset;
        u32 length;
        u16 chipset = (rt2x00_rev(&rt2x00dev->chip) >> 16) & 0xffff;

        /*
         * Check which section of the firmware we need.
         */
        if ((chipset == 0x2860) ||
            (chipset == 0x2872) ||
            (chipset == 0x3070)) {
                offset = 0;
                length = 4096;
        } else {
                offset = 4096;
                length = 4096;
        }

        /*
         * Wait for stable hardware.
         */
        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2x00usb_register_read(rt2x00dev, MAC_CSR0, &reg);
                if (reg && reg != ~0)
                        break;
                msleep(1);
        }

        if (i == REGISTER_BUSY_COUNT) {
                ERROR(rt2x00dev, "Unstable hardware.\n");
                return -EBUSY;
        }

        /*
         * Write firmware to device.
         */
        rt2x00usb_vendor_request_large_buff(rt2x00dev, USB_MULTI_WRITE,
                                            USB_VENDOR_REQUEST_OUT,
                                            FIRMWARE_IMAGE_BASE,
                                            data + offset, length,
                                            REGISTER_TIMEOUT32(length));

        rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
        rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);

        /*
         * Send firmware request to device to load firmware,
         * we need to specify a long timeout time.
         */
        status = rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE,
                                             0, USB_MODE_FIRMWARE,
                                             REGISTER_TIMEOUT_FIRMWARE);
        if (status < 0) {
                ERROR(rt2x00dev, "Failed to write Firmware to device.\n");
                return status;
        }

        msleep(10);
        rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);

        /*
         * Send signal to firmware during boot time.
         */
        rt2800usb_mcu_request(rt2x00dev, MCU_BOOT_SIGNAL, 0xff, 0, 0);

        if ((chipset == 0x3070) ||
            (chipset == 0x3071) ||
            (chipset == 0x3572)) {
                udelay(200);
                rt2800usb_mcu_request(rt2x00dev, MCU_CURRENT, 0, 0, 0);
                udelay(10);
        }

        /*
         * Wait for device to stabilize.
         */
        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2x00usb_register_read(rt2x00dev, PBF_SYS_CTRL, &reg);
                if (rt2x00_get_field32(reg, PBF_SYS_CTRL_READY))
                        break;
                msleep(1);
        }

        if (i == REGISTER_BUSY_COUNT) {
                ERROR(rt2x00dev, "PBF system register not ready.\n");
                return -EBUSY;
        }

        /*
         * Initialize firmware.
         */
        rt2x00usb_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
        rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);
        msleep(1);

        return 0;
}

/*
 * Initialization functions.
 */
static int rt2800usb_init_registers(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;
        unsigned int i;

        /*
         * Wait untill BBP and RF are ready.
         */
        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2x00usb_register_read(rt2x00dev, MAC_CSR0, &reg);
                if (reg && reg != ~0)
                        break;
                msleep(1);
        }

        if (i == REGISTER_BUSY_COUNT) {
                ERROR(rt2x00dev, "Unstable hardware.\n");
                return -EBUSY;
        }

        rt2x00usb_register_read(rt2x00dev, PBF_SYS_CTRL, &reg);
        rt2x00usb_register_write(rt2x00dev, PBF_SYS_CTRL, reg & ~0x00002000);

        rt2x00usb_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_CSR, 1);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_BBP, 1);
        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, reg);

        rt2x00usb_register_write(rt2x00dev, USB_DMA_CFG, 0x00000000);

        rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE, 0,
                                    USB_MODE_RESET, REGISTER_TIMEOUT);

        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00000000);

        rt2x00usb_register_read(rt2x00dev, BCN_OFFSET0, &reg);
        rt2x00_set_field32(&reg, BCN_OFFSET0_BCN0, 0xe0); /* 0x3800 */
        rt2x00_set_field32(&reg, BCN_OFFSET0_BCN1, 0xe8); /* 0x3a00 */
        rt2x00_set_field32(&reg, BCN_OFFSET0_BCN2, 0xf0); /* 0x3c00 */
        rt2x00_set_field32(&reg, BCN_OFFSET0_BCN3, 0xf8); /* 0x3e00 */
        rt2x00usb_register_write(rt2x00dev, BCN_OFFSET0, reg);

        rt2x00usb_register_read(rt2x00dev, BCN_OFFSET1, &reg);
        rt2x00_set_field32(&reg, BCN_OFFSET1_BCN4, 0xc8); /* 0x3200 */
        rt2x00_set_field32(&reg, BCN_OFFSET1_BCN5, 0xd0); /* 0x3400 */
        rt2x00_set_field32(&reg, BCN_OFFSET1_BCN6, 0x77); /* 0x1dc0 */
        rt2x00_set_field32(&reg, BCN_OFFSET1_BCN7, 0x6f); /* 0x1bc0 */
        rt2x00usb_register_write(rt2x00dev, BCN_OFFSET1, reg);

        rt2x00usb_register_write(rt2x00dev, LEGACY_BASIC_RATE, 0x0000013f);
        rt2x00usb_register_write(rt2x00dev, HT_BASIC_RATE, 0x00008003);

        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00000000);

        rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_INTERVAL, 0);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 0);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_SYNC, 0);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 0);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_TX_TIME_COMPENSATE, 0);
        rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);

        if (rt2x00_rev(&rt2x00dev->chip) == RT3070_VERSION) {
                rt2x00usb_register_write(rt2x00dev, TX_SW_CFG0, 0x00000400);
                rt2x00usb_register_write(rt2x00dev, TX_SW_CFG1, 0x00000000);
                rt2x00usb_register_write(rt2x00dev, TX_SW_CFG2, 0x00000000);
        } else {
                rt2x00usb_register_write(rt2x00dev, TX_SW_CFG0, 0x00000000);
                rt2x00usb_register_write(rt2x00dev, TX_SW_CFG1, 0x00080606);
        }

        rt2x00usb_register_read(rt2x00dev, TX_LINK_CFG, &reg);
        rt2x00_set_field32(&reg, TX_LINK_CFG_REMOTE_MFB_LIFETIME, 32);
        rt2x00_set_field32(&reg, TX_LINK_CFG_MFB_ENABLE, 0);
        rt2x00_set_field32(&reg, TX_LINK_CFG_REMOTE_UMFS_ENABLE, 0);
        rt2x00_set_field32(&reg, TX_LINK_CFG_TX_MRQ_EN, 0);
        rt2x00_set_field32(&reg, TX_LINK_CFG_TX_RDG_EN, 0);
        rt2x00_set_field32(&reg, TX_LINK_CFG_TX_CF_ACK_EN, 1);
        rt2x00_set_field32(&reg, TX_LINK_CFG_REMOTE_MFB, 0);
        rt2x00_set_field32(&reg, TX_LINK_CFG_REMOTE_MFS, 0);
        rt2x00usb_register_write(rt2x00dev, TX_LINK_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, TX_TIMEOUT_CFG, &reg);
        rt2x00_set_field32(&reg, TX_TIMEOUT_CFG_MPDU_LIFETIME, 9);
        rt2x00_set_field32(&reg, TX_TIMEOUT_CFG_TX_OP_TIMEOUT, 10);
        rt2x00usb_register_write(rt2x00dev, TX_TIMEOUT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MAX_LEN_CFG, &reg);
        rt2x00_set_field32(&reg, MAX_LEN_CFG_MAX_MPDU, AGGREGATION_SIZE);
        if (rt2x00_rev(&rt2x00dev->chip) >= RT2880E_VERSION &&
            rt2x00_rev(&rt2x00dev->chip) < RT3070_VERSION)
                rt2x00_set_field32(&reg, MAX_LEN_CFG_MAX_PSDU, 2);
        else
                rt2x00_set_field32(&reg, MAX_LEN_CFG_MAX_PSDU, 1);
        rt2x00_set_field32(&reg, MAX_LEN_CFG_MIN_PSDU, 0);
        rt2x00_set_field32(&reg, MAX_LEN_CFG_MIN_MPDU, 0);
        rt2x00usb_register_write(rt2x00dev, MAX_LEN_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, PBF_MAX_PCNT, 0x1f3fbf9f);

        rt2x00usb_register_read(rt2x00dev, AUTO_RSP_CFG, &reg);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_AUTORESPONDER, 1);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_CTS_40_MMODE, 0);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_CTS_40_MREF, 0);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_DUAL_CTS_EN, 0);
        rt2x00_set_field32(&reg, AUTO_RSP_CFG_ACK_CTS_PSM_BIT, 0);
        rt2x00usb_register_write(rt2x00dev, AUTO_RSP_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, CCK_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_PROTECT_RATE, 8);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_MM40, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_TX_OP_ALLOW_GF40, 1);
        rt2x00usb_register_write(rt2x00dev, CCK_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, OFDM_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_PROTECT_RATE, 8);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_MM40, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_TX_OP_ALLOW_GF40, 1);
        rt2x00usb_register_write(rt2x00dev, OFDM_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MM20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_PROTECT_RATE, 0x4004);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_MM40, 0);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_TX_OP_ALLOW_GF40, 0);
        rt2x00usb_register_write(rt2x00dev, MM20_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MM40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_PROTECT_RATE, 0x4084);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_MM40, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_TX_OP_ALLOW_GF40, 1);
        rt2x00usb_register_write(rt2x00dev, MM40_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, GF20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_PROTECT_RATE, 0x4004);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_MM40, 0);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_TX_OP_ALLOW_GF40, 0);
        rt2x00usb_register_write(rt2x00dev, GF20_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, GF40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_PROTECT_RATE, 0x4084);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_PROTECT_CTRL, 0);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_PROTECT_NAV, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_CCK, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_OFDM, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_MM20, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_MM40, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_GF20, 1);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_TX_OP_ALLOW_GF40, 1);
        rt2x00usb_register_write(rt2x00dev, GF40_PROT_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, PBF_CFG, 0xf40006);

        rt2x00usb_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_DMA_BUSY, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_RX_DMA_BUSY, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_WP_DMA_BURST_SIZE, 3);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_BIG_ENDIAN, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_RX_HDR_SCATTER, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_HDR_SEG_LEN, 0);
        rt2x00usb_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, TXOP_CTRL_CFG, 0x0000583f);
        rt2x00usb_register_write(rt2x00dev, TXOP_HLDR_ET, 0x00000002);

        rt2x00usb_register_read(rt2x00dev, TX_RTS_CFG, &reg);
        rt2x00_set_field32(&reg, TX_RTS_CFG_AUTO_RTS_RETRY_LIMIT, 32);
        rt2x00_set_field32(&reg, TX_RTS_CFG_RTS_THRES,
                           IEEE80211_MAX_RTS_THRESHOLD);
        rt2x00_set_field32(&reg, TX_RTS_CFG_RTS_FBK_EN, 0);
        rt2x00usb_register_write(rt2x00dev, TX_RTS_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, EXP_ACK_TIME, 0x002400ca);
        rt2x00usb_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003);

        /*
         * ASIC will keep garbage value after boot, clear encryption keys.
         */
        for (i = 0; i < 4; i++)
                rt2x00usb_register_write(rt2x00dev,
                                         SHARED_KEY_MODE_ENTRY(i), 0);

        for (i = 0; i < 256; i++) {
                u32 wcid[2] = { 0xffffffff, 0x00ffffff };
                rt2x00usb_register_multiwrite(rt2x00dev, MAC_WCID_ENTRY(i),
                                              wcid, sizeof(wcid));

                rt2x00usb_register_write(rt2x00dev, MAC_WCID_ATTR_ENTRY(i), 1);
                rt2x00usb_register_write(rt2x00dev, MAC_IVEIV_ENTRY(i), 0);
        }

        /*
         * Clear all beacons
         * For the Beacon base registers we only need to clear
         * the first byte since that byte contains the VALID and OWNER
         * bits which (when set to 0) will invalidate the entire beacon.
         */
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE0, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE1, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE2, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE3, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE4, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE5, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE6, 0);
        rt2x00usb_register_write(rt2x00dev, HW_BEACON_BASE7, 0);

        rt2x00usb_register_read(rt2x00dev, USB_CYC_CFG, &reg);
        rt2x00_set_field32(&reg, USB_CYC_CFG_CLOCK_CYCLE, 30);
        rt2x00usb_register_write(rt2x00dev, USB_CYC_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, HT_FBK_CFG0, &reg);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS0FBK, 0);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS1FBK, 0);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS2FBK, 1);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS3FBK, 2);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS4FBK, 3);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS5FBK, 4);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS6FBK, 5);
        rt2x00_set_field32(&reg, HT_FBK_CFG0_HTMCS7FBK, 6);
        rt2x00usb_register_write(rt2x00dev, HT_FBK_CFG0, reg);

        rt2x00usb_register_read(rt2x00dev, HT_FBK_CFG1, &reg);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS8FBK, 8);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS9FBK, 8);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS10FBK, 9);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS11FBK, 10);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS12FBK, 11);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS13FBK, 12);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS14FBK, 13);
        rt2x00_set_field32(&reg, HT_FBK_CFG1_HTMCS15FBK, 14);
        rt2x00usb_register_write(rt2x00dev, HT_FBK_CFG1, reg);

        rt2x00usb_register_read(rt2x00dev, LG_FBK_CFG0, &reg);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS0FBK, 8);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS1FBK, 8);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS2FBK, 9);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS3FBK, 10);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS4FBK, 11);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS5FBK, 12);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS6FBK, 13);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_OFDMMCS7FBK, 14);
        rt2x00usb_register_write(rt2x00dev, LG_FBK_CFG0, reg);

        rt2x00usb_register_read(rt2x00dev, LG_FBK_CFG1, &reg);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_CCKMCS0FBK, 0);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_CCKMCS1FBK, 0);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_CCKMCS2FBK, 1);
        rt2x00_set_field32(&reg, LG_FBK_CFG0_CCKMCS3FBK, 2);
        rt2x00usb_register_write(rt2x00dev, LG_FBK_CFG1, reg);

        /*
         * We must clear the error counters.
         * These registers are cleared on read,
         * so we may pass a useless variable to store the value.
         */
        rt2x00usb_register_read(rt2x00dev, RX_STA_CNT0, &reg);
        rt2x00usb_register_read(rt2x00dev, RX_STA_CNT1, &reg);
        rt2x00usb_register_read(rt2x00dev, RX_STA_CNT2, &reg);
        rt2x00usb_register_read(rt2x00dev, TX_STA_CNT0, &reg);
        rt2x00usb_register_read(rt2x00dev, TX_STA_CNT1, &reg);
        rt2x00usb_register_read(rt2x00dev, TX_STA_CNT2, &reg);

        return 0;
}

static int rt2800usb_wait_bbp_rf_ready(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i;
        u32 reg;

        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2x00usb_register_read(rt2x00dev, MAC_STATUS_CFG, &reg);
                if (!rt2x00_get_field32(reg, MAC_STATUS_CFG_BBP_RF_BUSY))
                        return 0;

                udelay(REGISTER_BUSY_DELAY);
        }

        ERROR(rt2x00dev, "BBP/RF register access failed, aborting.\n");
        return -EACCES;
}

static int rt2800usb_wait_bbp_ready(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i;
        u8 value;

        /*
         * BBP was enabled after firmware was loaded,
         * but we need to reactivate it now.
         */
        rt2x00usb_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
        rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);
        msleep(1);

        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2800usb_bbp_read(rt2x00dev, 0, &value);
                if ((value != 0xff) && (value != 0x00))
                        return 0;
                udelay(REGISTER_BUSY_DELAY);
        }

        ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
        return -EACCES;
}

static int rt2800usb_init_bbp(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i;
        u16 eeprom;
        u8 reg_id;
        u8 value;

        if (unlikely(rt2800usb_wait_bbp_rf_ready(rt2x00dev) ||
                     rt2800usb_wait_bbp_ready(rt2x00dev)))
                return -EACCES;

        rt2800usb_bbp_write(rt2x00dev, 65, 0x2c);
        rt2800usb_bbp_write(rt2x00dev, 66, 0x38);
        rt2800usb_bbp_write(rt2x00dev, 69, 0x12);
        rt2800usb_bbp_write(rt2x00dev, 70, 0x0a);
        rt2800usb_bbp_write(rt2x00dev, 73, 0x10);
        rt2800usb_bbp_write(rt2x00dev, 81, 0x37);
        rt2800usb_bbp_write(rt2x00dev, 82, 0x62);
        rt2800usb_bbp_write(rt2x00dev, 83, 0x6a);
        rt2800usb_bbp_write(rt2x00dev, 84, 0x99);
        rt2800usb_bbp_write(rt2x00dev, 86, 0x00);
        rt2800usb_bbp_write(rt2x00dev, 91, 0x04);
        rt2800usb_bbp_write(rt2x00dev, 92, 0x00);
        rt2800usb_bbp_write(rt2x00dev, 103, 0x00);
        rt2800usb_bbp_write(rt2x00dev, 105, 0x05);

        if (rt2x00_rev(&rt2x00dev->chip) == RT2860C_VERSION) {
                rt2800usb_bbp_write(rt2x00dev, 69, 0x16);
                rt2800usb_bbp_write(rt2x00dev, 73, 0x12);
        }

        if (rt2x00_rev(&rt2x00dev->chip) > RT2860D_VERSION) {
                rt2800usb_bbp_write(rt2x00dev, 84, 0x19);
        }

        if (rt2x00_rev(&rt2x00dev->chip) == RT3070_VERSION) {
                rt2800usb_bbp_write(rt2x00dev, 70, 0x0a);
                rt2800usb_bbp_write(rt2x00dev, 84, 0x99);
                rt2800usb_bbp_write(rt2x00dev, 105, 0x05);
        }

        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);
                        rt2800usb_bbp_write(rt2x00dev, reg_id, value);
                }
        }

        return 0;
}

static u8 rt2800usb_init_rx_filter(struct rt2x00_dev *rt2x00dev,
                                   bool bw40, u8 rfcsr24, u8 filter_target)
{
        unsigned int i;
        u8 bbp;
        u8 rfcsr;
        u8 passband;
        u8 stopband;
        u8 overtuned = 0;

        rt2800usb_rfcsr_write(rt2x00dev, 24, rfcsr24);

        rt2800usb_bbp_read(rt2x00dev, 4, &bbp);
        rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 2 * bw40);
        rt2800usb_bbp_write(rt2x00dev, 4, bbp);

        rt2800usb_rfcsr_read(rt2x00dev, 22, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR22_BASEBAND_LOOPBACK, 1);
        rt2800usb_rfcsr_write(rt2x00dev, 22, rfcsr);

        /*
         * Set power & frequency of passband test tone
         */
        rt2800usb_bbp_write(rt2x00dev, 24, 0);

        for (i = 0; i < 100; i++) {
                rt2800usb_bbp_write(rt2x00dev, 25, 0x90);
                msleep(1);

                rt2800usb_bbp_read(rt2x00dev, 55, &passband);
                if (passband)
                        break;
        }

        /*
         * Set power & frequency of stopband test tone
         */
        rt2800usb_bbp_write(rt2x00dev, 24, 0x06);

        for (i = 0; i < 100; i++) {
                rt2800usb_bbp_write(rt2x00dev, 25, 0x90);
                msleep(1);

                rt2800usb_bbp_read(rt2x00dev, 55, &stopband);

                if ((passband - stopband) <= filter_target) {
                        rfcsr24++;
                        overtuned += ((passband - stopband) == filter_target);
                } else
                        break;

                rt2800usb_rfcsr_write(rt2x00dev, 24, rfcsr24);
        }

        rfcsr24 -= !!overtuned;

        rt2800usb_rfcsr_write(rt2x00dev, 24, rfcsr24);
        return rfcsr24;
}

static int rt2800usb_init_rfcsr(struct rt2x00_dev *rt2x00dev)
{
        u8 rfcsr;
        u8 bbp;

        if (rt2x00_rev(&rt2x00dev->chip) != RT3070_VERSION)
                return 0;

        /*
         * Init RF calibration.
         */
        rt2800usb_rfcsr_read(rt2x00dev, 30, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1);
        rt2800usb_rfcsr_write(rt2x00dev, 30, rfcsr);
        msleep(1);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 0);
        rt2800usb_rfcsr_write(rt2x00dev, 30, rfcsr);

        rt2800usb_rfcsr_write(rt2x00dev, 4, 0x40);
        rt2800usb_rfcsr_write(rt2x00dev, 5, 0x03);
        rt2800usb_rfcsr_write(rt2x00dev, 6, 0x02);
        rt2800usb_rfcsr_write(rt2x00dev, 7, 0x70);
        rt2800usb_rfcsr_write(rt2x00dev, 9, 0x0f);
        rt2800usb_rfcsr_write(rt2x00dev, 10, 0x71);
        rt2800usb_rfcsr_write(rt2x00dev, 11, 0x21);
        rt2800usb_rfcsr_write(rt2x00dev, 12, 0x7b);
        rt2800usb_rfcsr_write(rt2x00dev, 14, 0x90);
        rt2800usb_rfcsr_write(rt2x00dev, 15, 0x58);
        rt2800usb_rfcsr_write(rt2x00dev, 16, 0xb3);
        rt2800usb_rfcsr_write(rt2x00dev, 17, 0x92);
        rt2800usb_rfcsr_write(rt2x00dev, 18, 0x2c);
        rt2800usb_rfcsr_write(rt2x00dev, 19, 0x02);
        rt2800usb_rfcsr_write(rt2x00dev, 20, 0xba);
        rt2800usb_rfcsr_write(rt2x00dev, 21, 0xdb);
        rt2800usb_rfcsr_write(rt2x00dev, 24, 0x16);
        rt2800usb_rfcsr_write(rt2x00dev, 25, 0x01);
        rt2800usb_rfcsr_write(rt2x00dev, 27, 0x03);
        rt2800usb_rfcsr_write(rt2x00dev, 29, 0x1f);

        /*
         * Set RX Filter calibration for 20MHz and 40MHz
         */
        rt2x00dev->calibration[0] =
            rt2800usb_init_rx_filter(rt2x00dev, false, 0x07, 0x16);
        rt2x00dev->calibration[1] =
            rt2800usb_init_rx_filter(rt2x00dev, true, 0x27, 0x19);

        /*
         * Set back to initial state
         */
        rt2800usb_bbp_write(rt2x00dev, 24, 0);

        rt2800usb_rfcsr_read(rt2x00dev, 22, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR22_BASEBAND_LOOPBACK, 0);
        rt2800usb_rfcsr_write(rt2x00dev, 22, rfcsr);

        /*
         * set BBP back to BW20
         */
        rt2800usb_bbp_read(rt2x00dev, 4, &bbp);
        rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 0);
        rt2800usb_bbp_write(rt2x00dev, 4, bbp);

        return 0;
}

/*
 * Device state switch handlers.
 */
static void rt2800usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
                                enum dev_state state)
{
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX,
                           (state == STATE_RADIO_RX_ON) ||
                           (state == STATE_RADIO_RX_ON_LINK));
        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, reg);
}

static int rt2800usb_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i;
        u32 reg;

        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2x00usb_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
                if (!rt2x00_get_field32(reg, WPDMA_GLO_CFG_TX_DMA_BUSY) &&
                    !rt2x00_get_field32(reg, WPDMA_GLO_CFG_RX_DMA_BUSY))
                        return 0;

                msleep(1);
        }

        ERROR(rt2x00dev, "WPDMA TX/RX busy, aborting.\n");
        return -EACCES;
}

static int rt2800usb_enable_radio(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;
        u16 word;

        /*
         * Initialize all registers.
         */
        if (unlikely(rt2800usb_wait_wpdma_ready(rt2x00dev) ||
                     rt2800usb_init_registers(rt2x00dev) ||
                     rt2800usb_init_bbp(rt2x00dev) ||
                     rt2800usb_init_rfcsr(rt2x00dev)))
                return -EIO;

        rt2x00usb_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_TX, 1);
        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, reg);

        udelay(50);

        rt2x00usb_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_TX_WRITEBACK_DONE, 1);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_RX_DMA, 1);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 1);
        rt2x00usb_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);


        rt2x00usb_register_read(rt2x00dev, USB_DMA_CFG, &reg);
        rt2x00_set_field32(&reg, USB_DMA_CFG_PHY_CLEAR, 0);
        /* Don't use bulk in aggregation when working with USB 1.1 */
        rt2x00_set_field32(&reg, USB_DMA_CFG_RX_BULK_AGG_EN,
                           (rt2x00dev->rx->usb_maxpacket == 512));
        rt2x00_set_field32(&reg, USB_DMA_CFG_RX_BULK_AGG_TIMEOUT, 128);
        /*
         * Total room for RX frames in kilobytes, PBF might still exceed
         * this limit so reduce the number to prevent errors.
         */
        rt2x00_set_field32(&reg, USB_DMA_CFG_RX_BULK_AGG_LIMIT,
                           ((RX_ENTRIES * DATA_FRAME_SIZE) / 1024) - 3);
        rt2x00_set_field32(&reg, USB_DMA_CFG_RX_BULK_EN, 1);
        rt2x00_set_field32(&reg, USB_DMA_CFG_TX_BULK_EN, 1);
        rt2x00usb_register_write(rt2x00dev, USB_DMA_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MAC_SYS_CTRL, &reg);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_TX, 1);
        rt2x00_set_field32(&reg, MAC_SYS_CTRL_ENABLE_RX, 1);
        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, reg);

        /*
         * Initialize LED control
         */
        rt2x00_eeprom_read(rt2x00dev, EEPROM_LED1, &word);
        rt2800usb_mcu_request(rt2x00dev, MCU_LED_1, 0xff,
                              word & 0xff, (word >> 8) & 0xff);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_LED2, &word);
        rt2800usb_mcu_request(rt2x00dev, MCU_LED_2, 0xff,
                              word & 0xff, (word >> 8) & 0xff);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_LED3, &word);
        rt2800usb_mcu_request(rt2x00dev, MCU_LED_3, 0xff,
                              word & 0xff, (word >> 8) & 0xff);

        return 0;
}

static void rt2800usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
        rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_RX_DMA, 0);
        rt2x00usb_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);

        rt2x00usb_register_write(rt2x00dev, MAC_SYS_CTRL, 0);
        rt2x00usb_register_write(rt2x00dev, PWR_PIN_CFG, 0);
        rt2x00usb_register_write(rt2x00dev, TX_PIN_CFG, 0);

        /* Wait for DMA, ignore error */
        rt2800usb_wait_wpdma_ready(rt2x00dev);

        rt2x00usb_disable_radio(rt2x00dev);
}

static int rt2800usb_set_state(struct rt2x00_dev *rt2x00dev,
                               enum dev_state state)
{
        if (state == STATE_AWAKE)
                rt2800usb_mcu_request(rt2x00dev, MCU_WAKEUP, 0xff, 0, 0);
        else
                rt2800usb_mcu_request(rt2x00dev, MCU_SLEEP, 0xff, 0, 2);

        return 0;
}

static int rt2800usb_set_device_state(struct rt2x00_dev *rt2x00dev,
                                      enum dev_state state)
{
        int retval = 0;

        switch (state) {
        case STATE_RADIO_ON:
                /*
                 * Before the radio can be enabled, the device first has
                 * to be woken up. After that it needs a bit of time
                 * to be fully awake and then the radio can be enabled.
                 */
                rt2800usb_set_state(rt2x00dev, STATE_AWAKE);
                msleep(1);
                retval = rt2800usb_enable_radio(rt2x00dev);
                break;
        case STATE_RADIO_OFF:
                /*
                 * After the radio has been disabled, the device should
                 * be put to sleep for powersaving.
                 */
                rt2800usb_disable_radio(rt2x00dev);
                rt2800usb_set_state(rt2x00dev, STATE_SLEEP);
                break;
        case STATE_RADIO_RX_ON:
        case STATE_RADIO_RX_ON_LINK:
        case STATE_RADIO_RX_OFF:
        case STATE_RADIO_RX_OFF_LINK:
                rt2800usb_toggle_rx(rt2x00dev, state);
                break;
        case STATE_RADIO_IRQ_ON:
        case STATE_RADIO_IRQ_OFF:
                /* No support, but no error either */
                break;
        case STATE_DEEP_SLEEP:
        case STATE_SLEEP:
        case STATE_STANDBY:
        case STATE_AWAKE:
                retval = rt2800usb_set_state(rt2x00dev, state);
                break;
        default:
                retval = -ENOTSUPP;
                break;
        }

        if (unlikely(retval))
                ERROR(rt2x00dev, "Device failed to enter state %d (%d).\n",
                      state, retval);

        return retval;
}

/*
 * TX descriptor initialization
 */
static void rt2800usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
                                    struct sk_buff *skb,
                                    struct txentry_desc *txdesc)
{
        struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
        __le32 *txi = skbdesc->desc;
        __le32 *txwi = &txi[TXINFO_DESC_SIZE / sizeof(__le32)];
        u32 word;

        /*
         * Initialize TX Info descriptor
         */
        rt2x00_desc_read(txwi, 0, &word);
        rt2x00_set_field32(&word, TXWI_W0_FRAG,
                           test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W0_MIMO_PS, 0);
        rt2x00_set_field32(&word, TXWI_W0_CF_ACK, 0);
        rt2x00_set_field32(&word, TXWI_W0_TS,
                           test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W0_AMPDU,
                           test_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W0_MPDU_DENSITY, txdesc->mpdu_density);
        rt2x00_set_field32(&word, TXWI_W0_TX_OP, txdesc->ifs);
        rt2x00_set_field32(&word, TXWI_W0_MCS, txdesc->mcs);
        rt2x00_set_field32(&word, TXWI_W0_BW,
                           test_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W0_SHORT_GI,
                           test_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W0_STBC, txdesc->stbc);
        rt2x00_set_field32(&word, TXWI_W0_PHYMODE, txdesc->rate_mode);
        rt2x00_desc_write(txwi, 0, word);

        rt2x00_desc_read(txwi, 1, &word);
        rt2x00_set_field32(&word, TXWI_W1_ACK,
                           test_bit(ENTRY_TXD_ACK, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W1_NSEQ,
                           test_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags));
        rt2x00_set_field32(&word, TXWI_W1_BW_WIN_SIZE, txdesc->ba_size);
        rt2x00_set_field32(&word, TXWI_W1_WIRELESS_CLI_ID,
                           test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags) ?
                           txdesc->key_idx : 0xff);
        rt2x00_set_field32(&word, TXWI_W1_MPDU_TOTAL_BYTE_COUNT,
                           skb->len - txdesc->l2pad);
        rt2x00_set_field32(&word, TXWI_W1_PACKETID,

                           skbdesc->entry->queue->qid + 1);
        rt2x00_desc_write(txwi, 1, word);

        /*
         * Always write 0 to IV/EIV fields, hardware will insert the IV
         * from the IVEIV register when TXINFO_W0_WIV is set to 0.
         * When TXINFO_W0_WIV is set to 1 it will use the IV data
         * from the descriptor. The TXWI_W1_WIRELESS_CLI_ID indicates which
         * crypto entry in the registers should be used to encrypt the frame.
         */
        _rt2x00_desc_write(txwi, 2, 0 /* skbdesc->iv[0] */);
        _rt2x00_desc_write(txwi, 3, 0 /* skbdesc->iv[1] */);

        /*
         * Initialize TX descriptor
         */
        rt2x00_desc_read(txi, 0, &word);
        rt2x00_set_field32(&word, TXINFO_W0_USB_DMA_TX_PKT_LEN,
                           skb->len + TXWI_DESC_SIZE);
        rt2x00_set_field32(&word, TXINFO_W0_WIV,
                           !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc->flags));
        rt2x00_set_field32(&word, TXINFO_W0_QSEL, 2);
        rt2x00_set_field32(&word, TXINFO_W0_SW_USE_LAST_ROUND, 0);
        rt2x00_set_field32(&word, TXINFO_W0_USB_DMA_NEXT_VALID, 0);
        rt2x00_set_field32(&word, TXINFO_W0_USB_DMA_TX_BURST,
                           test_bit(ENTRY_TXD_BURST, &txdesc->flags));
        rt2x00_desc_write(txi, 0, word);
}

/*
 * TX data initialization
 */
static void rt2800usb_write_beacon(struct queue_entry *entry)
{
        struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
        struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
        unsigned int beacon_base;
        u32 reg;

        /*
         * Add the descriptor in front of the skb.
         */
        skb_push(entry->skb, entry->queue->desc_size);
        memcpy(entry->skb->data, skbdesc->desc, skbdesc->desc_len);
        skbdesc->desc = entry->skb->data;

        /*
         * Disable beaconing while we are reloading the beacon data,
         * otherwise we might be sending out invalid data.
         */
        rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
        rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);

        /*
         * Write entire beacon with descriptor to register.
         */
        beacon_base = HW_BEACON_OFFSET(entry->entry_idx);
        rt2x00usb_vendor_request_large_buff(rt2x00dev, USB_MULTI_WRITE,
                                            USB_VENDOR_REQUEST_OUT, beacon_base,
                                            entry->skb->data, entry->skb->len,
                                            REGISTER_TIMEOUT32(entry->skb->len));

        /*
         * Clean up the beacon skb.
         */
        dev_kfree_skb(entry->skb);
        entry->skb = NULL;
}

static int rt2800usb_get_tx_data_len(struct queue_entry *entry)
{
        int length;

        /*
         * The length _must_ include 4 bytes padding,
         * it should always be multiple of 4,
         * but it must _not_ be a multiple of the USB packet size.
         */
        length = roundup(entry->skb->len + 4, 4);
        length += (4 * !(length % entry->queue->usb_maxpacket));

        return length;
}

static void rt2800usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
                                    const enum data_queue_qid queue)
{
        u32 reg;

        if (queue != QID_BEACON) {
                rt2x00usb_kick_tx_queue(rt2x00dev, queue);
                return;
        }

        rt2x00usb_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        if (!rt2x00_get_field32(reg, BCN_TIME_CFG_BEACON_GEN)) {
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_TICKING, 1);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TBTT_ENABLE, 1);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
                rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);
        }
}

/*
 * RX control handlers
 */
static void rt2800usb_fill_rxdone(struct queue_entry *entry,
                                  struct rxdone_entry_desc *rxdesc)
{
        struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
        struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
        __le32 *rxd = (__le32 *)entry->skb->data;
        __le32 *rxwi;
        u32 rxd0;
        u32 rxwi0;
        u32 rxwi1;
        u32 rxwi2;
        u32 rxwi3;

        /*
         * Copy descriptor to the skbdesc->desc buffer, making it safe from
         * moving of frame data in rt2x00usb.
         */
        memcpy(skbdesc->desc, rxd, skbdesc->desc_len);
        rxd = (__le32 *)skbdesc->desc;
        rxwi = &rxd[RXD_DESC_SIZE / sizeof(__le32)];

        /*
         * It is now safe to read the descriptor on all architectures.
         */
        rt2x00_desc_read(rxd, 0, &rxd0);
        rt2x00_desc_read(rxwi, 0, &rxwi0);
        rt2x00_desc_read(rxwi, 1, &rxwi1);
        rt2x00_desc_read(rxwi, 2, &rxwi2);
        rt2x00_desc_read(rxwi, 3, &rxwi3);

        if (rt2x00_get_field32(rxd0, RXD_W0_CRC_ERROR))
                rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;

        if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) {
                rxdesc->cipher = rt2x00_get_field32(rxwi0, RXWI_W0_UDF);
                rxdesc->cipher_status =
                    rt2x00_get_field32(rxd0, RXD_W0_CIPHER_ERROR);
        }

        if (rt2x00_get_field32(rxd0, RXD_W0_DECRYPTED)) {
                /*
                 * Hardware has stripped IV/EIV data from 802.11 frame during
                 * decryption. Unfortunately the descriptor doesn't contain
                 * any fields with the EIV/IV data either, so they can't
                 * be restored by rt2x00lib.
                 */
                rxdesc->flags |= RX_FLAG_IV_STRIPPED;

                if (rxdesc->cipher_status == RX_CRYPTO_SUCCESS)
                        rxdesc->flags |= RX_FLAG_DECRYPTED;
                else if (rxdesc->cipher_status == RX_CRYPTO_FAIL_MIC)
                        rxdesc->flags |= RX_FLAG_MMIC_ERROR;
        }

        if (rt2x00_get_field32(rxd0, RXD_W0_MY_BSS))
                rxdesc->dev_flags |= RXDONE_MY_BSS;

        if (rt2x00_get_field32(rxd0, RXD_W0_L2PAD)) {
                rxdesc->dev_flags |= RXDONE_L2PAD;
                skbdesc->flags |= SKBDESC_L2_PADDED;
        }

        if (rt2x00_get_field32(rxwi1, RXWI_W1_SHORT_GI))
                rxdesc->flags |= RX_FLAG_SHORT_GI;

        if (rt2x00_get_field32(rxwi1, RXWI_W1_BW))
                rxdesc->flags |= RX_FLAG_40MHZ;

        /*
         * Detect RX rate, always use MCS as signal type.
         */
        rxdesc->dev_flags |= RXDONE_SIGNAL_MCS;
        rxdesc->rate_mode = rt2x00_get_field32(rxwi1, RXWI_W1_PHYMODE);
        rxdesc->signal = rt2x00_get_field32(rxwi1, RXWI_W1_MCS);

        /*
         * Mask of 0x8 bit to remove the short preamble flag.
         */
        if (rxdesc->rate_mode == RATE_MODE_CCK)
                rxdesc->signal &= ~0x8;

        rxdesc->rssi =
            (rt2x00_get_field32(rxwi2, RXWI_W2_RSSI0) +
             rt2x00_get_field32(rxwi2, RXWI_W2_RSSI1)) / 2;

        rxdesc->noise =
            (rt2x00_get_field32(rxwi3, RXWI_W3_SNR0) +
             rt2x00_get_field32(rxwi3, RXWI_W3_SNR1)) / 2;

        rxdesc->size = rt2x00_get_field32(rxwi0, RXWI_W0_MPDU_TOTAL_BYTE_COUNT);

        /*
         * Remove RXWI descriptor from start of buffer.
         */
        skb_pull(entry->skb, skbdesc->desc_len);
        skb_trim(entry->skb, rxdesc->size);
}

/*
 * Device probe functions.
 */
static int rt2800usb_validate_eeprom(struct rt2x00_dev *rt2x00dev)
{
        u16 word;
        u8 *mac;
        u8 default_lna_gain;

        rt2x00usb_eeprom_read(rt2x00dev, rt2x00dev->eeprom, EEPROM_SIZE);

        /*
         * Start validation of the data that has been read.
         */
        mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
        if (!is_valid_ether_addr(mac)) {
                random_ether_addr(mac);
                EEPROM(rt2x00dev, "MAC: %pM\n", mac);
        }

        rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
        if (word == 0xffff) {
                rt2x00_set_field16(&word, EEPROM_ANTENNA_RXPATH, 2);
                rt2x00_set_field16(&word, EEPROM_ANTENNA_TXPATH, 1);
                rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF2820);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
                EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
        } else if (rt2x00_rev(&rt2x00dev->chip) < RT2883_VERSION) {
                /*
                 * There is a max of 2 RX streams for RT2870 series
                 */
                if (rt2x00_get_field16(word, EEPROM_ANTENNA_RXPATH) > 2)
                        rt2x00_set_field16(&word, EEPROM_ANTENNA_RXPATH, 2);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
        }

        rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
        if (word == 0xffff) {
                rt2x00_set_field16(&word, EEPROM_NIC_HW_RADIO, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_DYNAMIC_TX_AGC, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_EXTERNAL_LNA_BG, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_EXTERNAL_LNA_A, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_CARDBUS_ACCEL, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_BW40M_SB_BG, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_BW40M_SB_A, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_WPS_PBC, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_BW40M_BG, 0);
                rt2x00_set_field16(&word, EEPROM_NIC_BW40M_A, 0);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
                EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
        }

        rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ, &word);
        if ((word & 0x00ff) == 0x00ff) {
                rt2x00_set_field16(&word, EEPROM_FREQ_OFFSET, 0);
                rt2x00_set_field16(&word, EEPROM_FREQ_LED_MODE,
                                   LED_MODE_TXRX_ACTIVITY);
                rt2x00_set_field16(&word, EEPROM_FREQ_LED_POLARITY, 0);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_FREQ, word);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_LED1, 0x5555);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_LED2, 0x2221);
                rt2x00_eeprom_write(rt2x00dev, EEPROM_LED3, 0xa9f8);
                EEPROM(rt2x00dev, "Freq: 0x%04x\n", word);
        }

        /*
         * During the LNA validation we are going to use
         * lna0 as correct value. Note that EEPROM_LNA
         * is never validated.
         */
        rt2x00_eeprom_read(rt2x00dev, EEPROM_LNA, &word);
        default_lna_gain = rt2x00_get_field16(word, EEPROM_LNA_A0);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG, &word);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_BG_OFFSET0)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_BG_OFFSET0, 0);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_BG_OFFSET1)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_BG_OFFSET1, 0);
        rt2x00_eeprom_write(rt2x00dev, EEPROM_RSSI_BG, word);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG2, &word);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_BG2_OFFSET2)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_BG2_OFFSET2, 0);
        if (rt2x00_get_field16(word, EEPROM_RSSI_BG2_LNA_A1) == 0x00 ||
            rt2x00_get_field16(word, EEPROM_RSSI_BG2_LNA_A1) == 0xff)
                rt2x00_set_field16(&word, EEPROM_RSSI_BG2_LNA_A1,
                                   default_lna_gain);
        rt2x00_eeprom_write(rt2x00dev, EEPROM_RSSI_BG2, word);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_A, &word);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_A_OFFSET0)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_A_OFFSET0, 0);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_A_OFFSET1)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_A_OFFSET1, 0);
        rt2x00_eeprom_write(rt2x00dev, EEPROM_RSSI_A, word);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_A2, &word);
        if (abs(rt2x00_get_field16(word, EEPROM_RSSI_A2_OFFSET2)) > 10)
                rt2x00_set_field16(&word, EEPROM_RSSI_A2_OFFSET2, 0);
        if (rt2x00_get_field16(word, EEPROM_RSSI_A2_LNA_A2) == 0x00 ||
            rt2x00_get_field16(word, EEPROM_RSSI_A2_LNA_A2) == 0xff)
                rt2x00_set_field16(&word, EEPROM_RSSI_A2_LNA_A2,
                                   default_lna_gain);
        rt2x00_eeprom_write(rt2x00dev, EEPROM_RSSI_A2, word);

        return 0;
}

static int rt2800usb_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);
        rt2x00usb_register_read(rt2x00dev, MAC_CSR0, &reg);
        rt2x00_set_chip(rt2x00dev, RT2870, value, reg);

        /*
         * The check for rt2860 is not a typo, some rt2870 hardware
         * identifies itself as rt2860 in the CSR register.
         */
        if (!rt2x00_check_rev(&rt2x00dev->chip, 0xfff00000, 0x28600000) &&
            !rt2x00_check_rev(&rt2x00dev->chip, 0xfff00000, 0x28700000) &&
            !rt2x00_check_rev(&rt2x00dev->chip, 0xfff00000, 0x28800000) &&
            !rt2x00_check_rev(&rt2x00dev->chip, 0xffff0000, 0x30700000)) {
                ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
                return -ENODEV;
        }

        if (!rt2x00_rf(&rt2x00dev->chip, RF2820) &&
            !rt2x00_rf(&rt2x00dev->chip, RF2850) &&
            !rt2x00_rf(&rt2x00dev->chip, RF2720) &&
            !rt2x00_rf(&rt2x00dev->chip, RF2750) &&
            !rt2x00_rf(&rt2x00dev->chip, RF3020) &&
            !rt2x00_rf(&rt2x00dev->chip, RF2020)) {
                ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
                return -ENODEV;
        }

        /*
         * Identify default antenna configuration.
         */
        rt2x00dev->default_ant.tx =
            rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TXPATH);
        rt2x00dev->default_ant.rx =
            rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RXPATH);

        /*
         * Read frequency offset and RF programming sequence.
         */
        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_A))
                __set_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags);
        if (rt2x00_get_field16(eeprom, EEPROM_NIC_EXTERNAL_LNA_BG))
                __set_bit(CONFIG_EXTERNAL_LNA_BG, &rt2x00dev->flags);

        /*
         * Detect if this device has an hardware controlled radio.
         */
        if (rt2x00_get_field16(eeprom, EEPROM_NIC_HW_RADIO))
                __set_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags);

        /*
         * Store led settings, for correct led behaviour.
         */
#ifdef CONFIG_RT2X00_LIB_LEDS
        rt2800usb_init_led(rt2x00dev, &rt2x00dev->led_radio, LED_TYPE_RADIO);
        rt2800usb_init_led(rt2x00dev, &rt2x00dev->led_assoc, LED_TYPE_ASSOC);
        rt2800usb_init_led(rt2x00dev, &rt2x00dev->led_qual, LED_TYPE_QUALITY);

        rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ,
                           &rt2x00dev->led_mcu_reg);
#endif /* CONFIG_RT2X00_LIB_LEDS */

        return 0;
}

/*
 * RF value list for rt2870
 * Supports: 2.4 GHz (all) & 5.2 GHz (RF2850 & RF2750)
 */
static const struct rf_channel rf_vals[] = {
        { 1,  0x18402ecc, 0x184c0786, 0x1816b455, 0x1800510b },
        { 2,  0x18402ecc, 0x184c0786, 0x18168a55, 0x1800519f },
        { 3,  0x18402ecc, 0x184c078a, 0x18168a55, 0x1800518b },
        { 4,  0x18402ecc, 0x184c078a, 0x18168a55, 0x1800519f },
        { 5,  0x18402ecc, 0x184c078e, 0x18168a55, 0x1800518b },
        { 6,  0x18402ecc, 0x184c078e, 0x18168a55, 0x1800519f },
        { 7,  0x18402ecc, 0x184c0792, 0x18168a55, 0x1800518b },
        { 8,  0x18402ecc, 0x184c0792, 0x18168a55, 0x1800519f },
        { 9,  0x18402ecc, 0x184c0796, 0x18168a55, 0x1800518b },
        { 10, 0x18402ecc, 0x184c0796, 0x18168a55, 0x1800519f },
        { 11, 0x18402ecc, 0x184c079a, 0x18168a55, 0x1800518b },
        { 12, 0x18402ecc, 0x184c079a, 0x18168a55, 0x1800519f },
        { 13, 0x18402ecc, 0x184c079e, 0x18168a55, 0x1800518b },
        { 14, 0x18402ecc, 0x184c07a2, 0x18168a55, 0x18005193 },

        /* 802.11 UNI / HyperLan 2 */
        { 36, 0x18402ecc, 0x184c099a, 0x18158a55, 0x180ed1a3 },
        { 38, 0x18402ecc, 0x184c099e, 0x18158a55, 0x180ed193 },
        { 40, 0x18402ec8, 0x184c0682, 0x18158a55, 0x180ed183 },
        { 44, 0x18402ec8, 0x184c0682, 0x18158a55, 0x180ed1a3 },
        { 46, 0x18402ec8, 0x184c0686, 0x18158a55, 0x180ed18b },
        { 48, 0x18402ec8, 0x184c0686, 0x18158a55, 0x180ed19b },
        { 52, 0x18402ec8, 0x184c068a, 0x18158a55, 0x180ed193 },
        { 54, 0x18402ec8, 0x184c068a, 0x18158a55, 0x180ed1a3 },
        { 56, 0x18402ec8, 0x184c068e, 0x18158a55, 0x180ed18b },
        { 60, 0x18402ec8, 0x184c0692, 0x18158a55, 0x180ed183 },
        { 62, 0x18402ec8, 0x184c0692, 0x18158a55, 0x180ed193 },
        { 64, 0x18402ec8, 0x184c0692, 0x18158a55, 0x180ed1a3 },

        /* 802.11 HyperLan 2 */
        { 100, 0x18402ec8, 0x184c06b2, 0x18178a55, 0x180ed783 },
        { 102, 0x18402ec8, 0x184c06b2, 0x18578a55, 0x180ed793 },
        { 104, 0x18402ec8, 0x185c06b2, 0x18578a55, 0x180ed1a3 },
        { 108, 0x18402ecc, 0x185c0a32, 0x18578a55, 0x180ed193 },
        { 110, 0x18402ecc, 0x184c0a36, 0x18178a55, 0x180ed183 },
        { 112, 0x18402ecc, 0x184c0a36, 0x18178a55, 0x180ed19b },
        { 116, 0x18402ecc, 0x184c0a3a, 0x18178a55, 0x180ed1a3 },
        { 118, 0x18402ecc, 0x184c0a3e, 0x18178a55, 0x180ed193 },
        { 120, 0x18402ec4, 0x184c0382, 0x18178a55, 0x180ed183 },
        { 124, 0x18402ec4, 0x184c0382, 0x18178a55, 0x180ed193 },
        { 126, 0x18402ec4, 0x184c0382, 0x18178a55, 0x180ed15b },
        { 128, 0x18402ec4, 0x184c0382, 0x18178a55, 0x180ed1a3 },
        { 132, 0x18402ec4, 0x184c0386, 0x18178a55, 0x180ed18b },
        { 134, 0x18402ec4, 0x184c0386, 0x18178a55, 0x180ed193 },
        { 136, 0x18402ec4, 0x184c0386, 0x18178a55, 0x180ed19b },
        { 140, 0x18402ec4, 0x184c038a, 0x18178a55, 0x180ed183 },

        /* 802.11 UNII */
        { 149, 0x18402ec4, 0x184c038a, 0x18178a55, 0x180ed1a7 },
        { 151, 0x18402ec4, 0x184c038e, 0x18178a55, 0x180ed187 },
        { 153, 0x18402ec4, 0x184c038e, 0x18178a55, 0x180ed18f },
        { 157, 0x18402ec4, 0x184c038e, 0x18178a55, 0x180ed19f },
        { 159, 0x18402ec4, 0x184c038e, 0x18178a55, 0x180ed1a7 },
        { 161, 0x18402ec4, 0x184c0392, 0x18178a55, 0x180ed187 },
        { 165, 0x18402ec4, 0x184c0392, 0x18178a55, 0x180ed197 },
        { 167, 0x18402ec4, 0x184c03d2, 0x18179855, 0x1815531f },
        { 169, 0x18402ec4, 0x184c03d2, 0x18179855, 0x18155327 },
        { 171, 0x18402ec4, 0x184c03d6, 0x18179855, 0x18155307 },
        { 173, 0x18402ec4, 0x184c03d6, 0x18179855, 0x1815530f },

        /* 802.11 Japan */
        { 184, 0x15002ccc, 0x1500491e, 0x1509be55, 0x150c0a0b },
        { 188, 0x15002ccc, 0x15004922, 0x1509be55, 0x150c0a13 },
        { 192, 0x15002ccc, 0x15004926, 0x1509be55, 0x150c0a1b },
        { 196, 0x15002ccc, 0x1500492a, 0x1509be55, 0x150c0a23 },
        { 208, 0x15002ccc, 0x1500493a, 0x1509be55, 0x150c0a13 },
        { 212, 0x15002ccc, 0x1500493e, 0x1509be55, 0x150c0a1b },
        { 216, 0x15002ccc, 0x15004982, 0x1509be55, 0x150c0a23 },
};

/*
 * RF value list for rt3070
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_3070[] = {
        {1,  241, 2, 2 },
        {2,  241, 2, 7 },
        {3,  242, 2, 2 },
        {4,  242, 2, 7 },
        {5,  243, 2, 2 },
        {6,  243, 2, 7 },
        {7,  244, 2, 2 },
        {8,  244, 2, 7 },
        {9,  245, 2, 2 },
        {10, 245, 2, 7 },
        {11, 246, 2, 2 },
        {12, 246, 2, 7 },
        {13, 247, 2, 2 },
        {14, 248, 2, 4 },
};

static int rt2800usb_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
{
        struct hw_mode_spec *spec = &rt2x00dev->spec;
        struct channel_info *info;
        char *tx_power1;
        char *tx_power2;
        unsigned int i;
        u16 eeprom;

        /*
         * Initialize all hw fields.
         */
        rt2x00dev->hw->flags =
            IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
            IEEE80211_HW_SIGNAL_DBM |
            IEEE80211_HW_SUPPORTS_PS |
            IEEE80211_HW_PS_NULLFUNC_STACK;
        rt2x00dev->hw->extra_tx_headroom = TXINFO_DESC_SIZE + TXWI_DESC_SIZE;

        SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->dev);
        SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
                                rt2x00_eeprom_addr(rt2x00dev,
                                                   EEPROM_MAC_ADDR_0));

        rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);

        /*
         * Initialize HT information.
         */
        spec->ht.ht_supported = true;
        spec->ht.cap =
            IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
            IEEE80211_HT_CAP_GRN_FLD |
            IEEE80211_HT_CAP_SGI_20 |
            IEEE80211_HT_CAP_SGI_40 |
            IEEE80211_HT_CAP_TX_STBC |
            IEEE80211_HT_CAP_RX_STBC |
            IEEE80211_HT_CAP_PSMP_SUPPORT;
        spec->ht.ampdu_factor = 3;
        spec->ht.ampdu_density = 4;
        spec->ht.mcs.tx_params =
            IEEE80211_HT_MCS_TX_DEFINED |
            IEEE80211_HT_MCS_TX_RX_DIFF |
            ((rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TXPATH) - 1) <<
                IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);

        switch (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RXPATH)) {
        case 3:
                spec->ht.mcs.rx_mask[2] = 0xff;
        case 2:
                spec->ht.mcs.rx_mask[1] = 0xff;
        case 1:
                spec->ht.mcs.rx_mask[0] = 0xff;
                spec->ht.mcs.rx_mask[4] = 0x1; /* MCS32 */
                break;
        }

        /*
         * Initialize hw_mode information.
         */
        spec->supported_bands = SUPPORT_BAND_2GHZ;
        spec->supported_rates = SUPPORT_RATE_CCK | SUPPORT_RATE_OFDM;

        if (rt2x00_rf(&rt2x00dev->chip, RF2820) ||
            rt2x00_rf(&rt2x00dev->chip, RF2720)) {
                spec->num_channels = 14;
                spec->channels = rf_vals;
        } else if (rt2x00_rf(&rt2x00dev->chip, RF2850) ||
                   rt2x00_rf(&rt2x00dev->chip, RF2750)) {
                spec->supported_bands |= SUPPORT_BAND_5GHZ;
                spec->num_channels = ARRAY_SIZE(rf_vals);
                spec->channels = rf_vals;
        } else if (rt2x00_rf(&rt2x00dev->chip, RF3020) ||
                   rt2x00_rf(&rt2x00dev->chip, RF2020)) {
                spec->num_channels = ARRAY_SIZE(rf_vals_3070);
                spec->channels = rf_vals_3070;
        }

        /*
         * Create channel information array
         */
        info = kzalloc(spec->num_channels * sizeof(*info), GFP_KERNEL);
        if (!info)
                return -ENOMEM;

        spec->channels_info = info;

        tx_power1 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_BG1);
        tx_power2 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_BG2);

        for (i = 0; i < 14; i++) {
                info[i].tx_power1 = TXPOWER_G_FROM_DEV(tx_power1[i]);
                info[i].tx_power2 = TXPOWER_G_FROM_DEV(tx_power2[i]);
        }

        if (spec->num_channels > 14) {
                tx_power1 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_A1);
                tx_power2 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_A2);

                for (i = 14; i < spec->num_channels; i++) {
                        info[i].tx_power1 = TXPOWER_A_FROM_DEV(tx_power1[i]);
                        info[i].tx_power2 = TXPOWER_A_FROM_DEV(tx_power2[i]);
                }
        }

        return 0;
}

static int rt2800usb_probe_hw(struct rt2x00_dev *rt2x00dev)
{
        int retval;

        /*
         * Allocate eeprom data.
         */
        retval = rt2800usb_validate_eeprom(rt2x00dev);
        if (retval)
                return retval;

        retval = rt2800usb_init_eeprom(rt2x00dev);
        if (retval)
                return retval;

        /*
         * Initialize hw specifications.
         */
        retval = rt2800usb_probe_hw_mode(rt2x00dev);
        if (retval)
                return retval;

        /*
         * This device has multiple filters for control frames
         * and has a separate filter for PS Poll frames.
         */
        __set_bit(DRIVER_SUPPORT_CONTROL_FILTERS, &rt2x00dev->flags);
        __set_bit(DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL, &rt2x00dev->flags);

        /*
         * This device requires firmware.
         */
        __set_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags);
        __set_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags);
        if (!modparam_nohwcrypt)
                __set_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags);

        /*
         * Set the rssi offset.
         */
        rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;

        return 0;
}

/*
 * IEEE80211 stack callback functions.
 */
static void rt2800usb_get_tkip_seq(struct ieee80211_hw *hw, u8 hw_key_idx,
                                   u32 *iv32, u16 *iv16)
{
        struct rt2x00_dev *rt2x00dev = hw->priv;
        struct mac_iveiv_entry iveiv_entry;
        u32 offset;

        offset = MAC_IVEIV_ENTRY(hw_key_idx);
        rt2x00usb_register_multiread(rt2x00dev, offset,
                                      &iveiv_entry, sizeof(iveiv_entry));

        memcpy(&iveiv_entry.iv[0], iv16, sizeof(iv16));
        memcpy(&iveiv_entry.iv[4], iv32, sizeof(iv32));
}

static int rt2800usb_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
        struct rt2x00_dev *rt2x00dev = hw->priv;
        u32 reg;
        bool enabled = (value < IEEE80211_MAX_RTS_THRESHOLD);

        rt2x00usb_register_read(rt2x00dev, TX_RTS_CFG, &reg);
        rt2x00_set_field32(&reg, TX_RTS_CFG_RTS_THRES, value);
        rt2x00usb_register_write(rt2x00dev, TX_RTS_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, CCK_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, CCK_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, CCK_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, OFDM_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, OFDM_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, OFDM_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MM20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, MM20_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, MM40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, MM40_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, GF20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, GF20_PROT_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, GF40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_RTS_TH_EN, enabled);
        rt2x00usb_register_write(rt2x00dev, GF40_PROT_CFG, reg);

        return 0;
}

static int rt2800usb_conf_tx(struct ieee80211_hw *hw, u16 queue_idx,
                             const struct ieee80211_tx_queue_params *params)
{
        struct rt2x00_dev *rt2x00dev = hw->priv;
        struct data_queue *queue;
        struct rt2x00_field32 field;
        int retval;
        u32 reg;
        u32 offset;

        /*
         * First pass the configuration through rt2x00lib, that will
         * update the queue settings and validate the input. After that
         * we are free to update the registers based on the value
         * in the queue parameter.
         */
        retval = rt2x00mac_conf_tx(hw, queue_idx, params);
        if (retval)
                return retval;

        /*
         * We only need to perform additional register initialization
         * for WMM queues/
         */
        if (queue_idx >= 4)
                return 0;

        queue = rt2x00queue_get_queue(rt2x00dev, queue_idx);

        /* Update WMM TXOP register */
        offset = WMM_TXOP0_CFG + (sizeof(u32) * (!!(queue_idx & 2)));
        field.bit_offset = (queue_idx & 1) * 16;
        field.bit_mask = 0xffff << field.bit_offset;

        rt2x00usb_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, field, queue->txop);
        rt2x00usb_register_write(rt2x00dev, offset, reg);

        /* Update WMM registers */
        field.bit_offset = queue_idx * 4;
        field.bit_mask = 0xf << field.bit_offset;

        rt2x00usb_register_read(rt2x00dev, WMM_AIFSN_CFG, &reg);
        rt2x00_set_field32(&reg, field, queue->aifs);
        rt2x00usb_register_write(rt2x00dev, WMM_AIFSN_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, WMM_CWMIN_CFG, &reg);
        rt2x00_set_field32(&reg, field, queue->cw_min);
        rt2x00usb_register_write(rt2x00dev, WMM_CWMIN_CFG, reg);

        rt2x00usb_register_read(rt2x00dev, WMM_CWMAX_CFG, &reg);
        rt2x00_set_field32(&reg, field, queue->cw_max);
        rt2x00usb_register_write(rt2x00dev, WMM_CWMAX_CFG, reg);

        /* Update EDCA registers */
        offset = EDCA_AC0_CFG + (sizeof(u32) * queue_idx);

        rt2x00usb_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, EDCA_AC0_CFG_TX_OP, queue->txop);
        rt2x00_set_field32(&reg, EDCA_AC0_CFG_AIFSN, queue->aifs);
        rt2x00_set_field32(&reg, EDCA_AC0_CFG_CWMIN, queue->cw_min);
        rt2x00_set_field32(&reg, EDCA_AC0_CFG_CWMAX, queue->cw_max);
        rt2x00usb_register_write(rt2x00dev, offset, reg);

        return 0;
}

static u64 rt2800usb_get_tsf(struct ieee80211_hw *hw)
{
        struct rt2x00_dev *rt2x00dev = hw->priv;
        u64 tsf;
        u32 reg;

        rt2x00usb_register_read(rt2x00dev, TSF_TIMER_DW1, &reg);
        tsf = (u64) rt2x00_get_field32(reg, TSF_TIMER_DW1_HIGH_WORD) << 32;
        rt2x00usb_register_read(rt2x00dev, TSF_TIMER_DW0, &reg);
        tsf |= rt2x00_get_field32(reg, TSF_TIMER_DW0_LOW_WORD);

        return tsf;
}

static const struct ieee80211_ops rt2800usb_mac80211_ops = {
        .tx                     = rt2x00mac_tx,
        .start                  = rt2x00mac_start,
        .stop                   = rt2x00mac_stop,
        .add_interface          = rt2x00mac_add_interface,
        .remove_interface       = rt2x00mac_remove_interface,
        .config                 = rt2x00mac_config,
        .configure_filter       = rt2x00mac_configure_filter,
        .set_tim                = rt2x00mac_set_tim,
        .set_key                = rt2x00mac_set_key,
        .get_stats              = rt2x00mac_get_stats,
        .get_tkip_seq           = rt2800usb_get_tkip_seq,
        .set_rts_threshold      = rt2800usb_set_rts_threshold,
        .bss_info_changed       = rt2x00mac_bss_info_changed,
        .conf_tx                = rt2800usb_conf_tx,
        .get_tx_stats           = rt2x00mac_get_tx_stats,
        .get_tsf                = rt2800usb_get_tsf,
        .rfkill_poll            = rt2x00mac_rfkill_poll,
};

static const struct rt2x00lib_ops rt2800usb_rt2x00_ops = {
        .probe_hw               = rt2800usb_probe_hw,
        .get_firmware_name      = rt2800usb_get_firmware_name,
        .check_firmware         = rt2800usb_check_firmware,
        .load_firmware          = rt2800usb_load_firmware,
        .initialize             = rt2x00usb_initialize,
        .uninitialize           = rt2x00usb_uninitialize,
        .clear_entry            = rt2x00usb_clear_entry,
        .set_device_state       = rt2800usb_set_device_state,
        .rfkill_poll            = rt2800usb_rfkill_poll,
        .link_stats             = rt2800usb_link_stats,
        .reset_tuner            = rt2800usb_reset_tuner,
        .link_tuner             = rt2800usb_link_tuner,
        .write_tx_desc          = rt2800usb_write_tx_desc,
        .write_tx_data          = rt2x00usb_write_tx_data,
        .write_beacon           = rt2800usb_write_beacon,
        .get_tx_data_len        = rt2800usb_get_tx_data_len,
        .kick_tx_queue          = rt2800usb_kick_tx_queue,
        .kill_tx_queue          = rt2x00usb_kill_tx_queue,
        .fill_rxdone            = rt2800usb_fill_rxdone,
        .config_shared_key      = rt2800usb_config_shared_key,
        .config_pairwise_key    = rt2800usb_config_pairwise_key,
        .config_filter          = rt2800usb_config_filter,
        .config_intf            = rt2800usb_config_intf,
        .config_erp             = rt2800usb_config_erp,
        .config_ant             = rt2800usb_config_ant,
        .config                 = rt2800usb_config,
};

static const struct data_queue_desc rt2800usb_queue_rx = {
        .entry_num              = RX_ENTRIES,
        .data_size              = AGGREGATION_SIZE,
        .desc_size              = RXD_DESC_SIZE + RXWI_DESC_SIZE,
        .priv_size              = sizeof(struct queue_entry_priv_usb),
};

static const struct data_queue_desc rt2800usb_queue_tx = {
        .entry_num              = TX_ENTRIES,
        .data_size              = AGGREGATION_SIZE,
        .desc_size              = TXINFO_DESC_SIZE + TXWI_DESC_SIZE,
        .priv_size              = sizeof(struct queue_entry_priv_usb),
};

static const struct data_queue_desc rt2800usb_queue_bcn = {
        .entry_num              = 8 * BEACON_ENTRIES,
        .data_size              = MGMT_FRAME_SIZE,
        .desc_size              = TXINFO_DESC_SIZE + TXWI_DESC_SIZE,
        .priv_size              = sizeof(struct queue_entry_priv_usb),
};

static const struct rt2x00_ops rt2800usb_ops = {
        .name           = KBUILD_MODNAME,
        .max_sta_intf   = 1,
        .max_ap_intf    = 8,
        .eeprom_size    = EEPROM_SIZE,
        .rf_size        = RF_SIZE,
        .tx_queues      = NUM_TX_QUEUES,
        .rx             = &rt2800usb_queue_rx,
        .tx             = &rt2800usb_queue_tx,
        .bcn            = &rt2800usb_queue_bcn,
        .lib            = &rt2800usb_rt2x00_ops,
        .hw             = &rt2800usb_mac80211_ops,
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
        .debugfs        = &rt2800usb_rt2x00debug,
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
};

/*
 * rt2800usb module information.
 */
static struct usb_device_id rt2800usb_device_table[] = {
        /* Abocom */
        { USB_DEVICE(0x07b8, 0x2870), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07b8, 0x2770), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07b8, 0x3070), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07b8, 0x3071), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07b8, 0x3072), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1482, 0x3c09), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* AirTies */
        { USB_DEVICE(0x1eda, 0x2310), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Amigo */
        { USB_DEVICE(0x0e0b, 0x9031), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0e0b, 0x9041), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Amit */
        { USB_DEVICE(0x15c5, 0x0008), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* ASUS */
        { USB_DEVICE(0x0b05, 0x1731), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0b05, 0x1732), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0b05, 0x1742), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0b05, 0x1760), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0b05, 0x1761), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* AzureWave */
        { USB_DEVICE(0x13d3, 0x3247), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x13d3, 0x3262), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x13d3, 0x3273), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x13d3, 0x3284), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Belkin */
        { USB_DEVICE(0x050d, 0x8053), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x050d, 0x805c), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x050d, 0x815c), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x050d, 0x825a), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Buffalo */
        { USB_DEVICE(0x0411, 0x00e8), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0411, 0x012e), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Conceptronic */
        { USB_DEVICE(0x14b2, 0x3c06), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c07), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c08), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c09), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c11), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c12), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c23), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c25), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c27), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x14b2, 0x3c28), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Corega */
        { USB_DEVICE(0x07aa, 0x002f), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07aa, 0x003c), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07aa, 0x003f), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x18c5, 0x0008), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x18c5, 0x0012), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* D-Link */
        { USB_DEVICE(0x07d1, 0x3c09), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c0a), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c0b), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c0d), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c0e), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c0f), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c11), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x07d1, 0x3c13), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Edimax */
        { USB_DEVICE(0x7392, 0x7711), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x7392, 0x7717), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x7392, 0x7718), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Encore */
        { USB_DEVICE(0x203d, 0x1480), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* EnGenius */
        { USB_DEVICE(0X1740, 0x9701), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x9702), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x9703), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x9705), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x9706), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x9801), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Gemtek */
        { USB_DEVICE(0x15a9, 0x0010), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Gigabyte */
        { USB_DEVICE(0x1044, 0x800b), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1044, 0x800c), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1044, 0x800d), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Hawking */
        { USB_DEVICE(0x0e66, 0x0001), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0e66, 0x0003), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0e66, 0x0009), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0e66, 0x000b), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* I-O DATA */
        { USB_DEVICE(0x04bb, 0x0945), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* LevelOne */
        { USB_DEVICE(0x1740, 0x0605), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1740, 0x0615), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Linksys */
        { USB_DEVICE(0x1737, 0x0070), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1737, 0x0071), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1737, 0x0077), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Logitec */
        { USB_DEVICE(0x0789, 0x0162), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0789, 0x0163), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0789, 0x0164), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Motorola */
        { USB_DEVICE(0x100d, 0x9031), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x100d, 0x9032), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Ovislink */
        { USB_DEVICE(0x1b75, 0x3072), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Pegatron */
        { USB_DEVICE(0x1d4d, 0x0002), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1d4d, 0x000c), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x1d4d, 0x000e), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Philips */
        { USB_DEVICE(0x0471, 0x200f), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Planex */
        { USB_DEVICE(0x2019, 0xed06), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x2019, 0xab24), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x2019, 0xab25), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Qcom */
        { USB_DEVICE(0x18e8, 0x6259), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Quanta */
        { USB_DEVICE(0x1a32, 0x0304), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Ralink */
        { USB_DEVICE(0x0db0, 0x3820), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x0db0, 0x6899), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x2070), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x2770), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x2870), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x3070), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x3071), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x3072), USB_DEVICE_DATA(&rt2800usb_ops) },
        { USB_DEVICE(0x148f, 0x3572), USB_DEVICE_DATA(&rt2800usb_ops) },
        /* Samsung */