/*
        Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
        Copyright (C) 2010 Ivo van Doorn <IvDoorn@gmail.com>
        Copyright (C) 2009 Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
        Copyright (C) 2009 Gertjan van Wingerde <gwingerde@gmail.com>

        Based on the original rt2800pci.c and rt2800usb.c.
          Copyright (C) 2009 Alban Browaeys <prahal@yahoo.com>
          Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
          Copyright (C) 2009 Luis Correia <luis.f.correia@gmail.com>
          Copyright (C) 2009 Mattias Nissler <mattias.nissler@gmx.de>
          Copyright (C) 2009 Mark Asselstine <asselsm@gmail.com>
          Copyright (C) 2009 Xose Vazquez Perez <xose.vazquez@gmail.com>
          <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: rt2800lib
        Abstract: rt2800 generic device routines.
 */

#include <linux/crc-ccitt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>

#include "rt2x00.h"
#include "rt2800lib.h"
#include "rt2800.h"

/*
 * Register access.
 * All access to the CSR registers will go through the methods
 * rt2800_register_read and rt2800_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) \
        rt2800_regbusy_read((__dev), BBP_CSR_CFG, BBP_CSR_CFG_BUSY, (__reg))
#define WAIT_FOR_RFCSR(__dev, __reg) \
        rt2800_regbusy_read((__dev), RF_CSR_CFG, RF_CSR_CFG_BUSY, (__reg))
#define WAIT_FOR_RF(__dev, __reg) \
        rt2800_regbusy_read((__dev), RF_CSR_CFG0, RF_CSR_CFG0_BUSY, (__reg))
#define WAIT_FOR_MCU(__dev, __reg) \
        rt2800_regbusy_read((__dev), H2M_MAILBOX_CSR, \
                            H2M_MAILBOX_CSR_OWNER, (__reg))

static inline bool rt2800_is_305x_soc(struct rt2x00_dev *rt2x00dev)
{
        /* check for rt2872 on SoC */
        if (!rt2x00_is_soc(rt2x00dev) ||
            !rt2x00_rt(rt2x00dev, RT2872))
                return false;

        /* we know for sure that these rf chipsets are used on rt305x boards */
        if (rt2x00_rf(rt2x00dev, RF3020) ||
            rt2x00_rf(rt2x00dev, RF3021) ||
            rt2x00_rf(rt2x00dev, RF3022))
                return true;

        NOTICE(rt2x00dev, "Unknown RF chipset on rt305x\n");
        return false;
}

static void rt2800_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);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_BBP_RW_MODE, 1);

                rt2800_register_write_lock(rt2x00dev, BBP_CSR_CFG, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800_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);
                rt2x00_set_field32(&reg, BBP_CSR_CFG_BBP_RW_MODE, 1);

                rt2800_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 rt2800_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);

                rt2800_register_write_lock(rt2x00dev, RF_CSR_CFG, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800_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);

                rt2800_register_write_lock(rt2x00dev, RF_CSR_CFG, reg);

                WAIT_FOR_RFCSR(rt2x00dev, &reg);
        }

        *value = rt2x00_get_field32(reg, RF_CSR_CFG_DATA);

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static void rt2800_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);

                rt2800_register_write_lock(rt2x00dev, RF_CSR_CFG0, reg);
                rt2x00_rf_write(rt2x00dev, word, value);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}

static int rt2800_enable_wlan_rt3290(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;
        int i, count;

        rt2800_register_read(rt2x00dev, WLAN_FUN_CTRL, &reg);
        if (rt2x00_get_field32(reg, WLAN_EN))
                return 0;

        rt2x00_set_field32(&reg, WLAN_GPIO_OUT_OE_BIT_ALL, 0xff);
        rt2x00_set_field32(&reg, FRC_WL_ANT_SET, 1);
        rt2x00_set_field32(&reg, WLAN_CLK_EN, 0);
        rt2x00_set_field32(&reg, WLAN_EN, 1);
        rt2800_register_write(rt2x00dev, WLAN_FUN_CTRL, reg);

        udelay(REGISTER_BUSY_DELAY);

        count = 0;
        do {
                /*
                 * Check PLL_LD & XTAL_RDY.
                 */
                for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                        rt2800_register_read(rt2x00dev, CMB_CTRL, &reg);
                        if (rt2x00_get_field32(reg, PLL_LD) &&
                            rt2x00_get_field32(reg, XTAL_RDY))
                                break;
                        udelay(REGISTER_BUSY_DELAY);
                }

                if (i >= REGISTER_BUSY_COUNT) {

                        if (count >= 10)
                                return -EIO;

                        rt2800_register_write(rt2x00dev, 0x58, 0x018);
                        udelay(REGISTER_BUSY_DELAY);
                        rt2800_register_write(rt2x00dev, 0x58, 0x418);
                        udelay(REGISTER_BUSY_DELAY);
                        rt2800_register_write(rt2x00dev, 0x58, 0x618);
                        udelay(REGISTER_BUSY_DELAY);
                        count++;
                } else {
                        count = 0;
                }

                rt2800_register_read(rt2x00dev, WLAN_FUN_CTRL, &reg);
                rt2x00_set_field32(&reg, PCIE_APP0_CLK_REQ, 0);
                rt2x00_set_field32(&reg, WLAN_CLK_EN, 1);
                rt2x00_set_field32(&reg, WLAN_RESET, 1);
                rt2800_register_write(rt2x00dev, WLAN_FUN_CTRL, reg);
                udelay(10);
                rt2x00_set_field32(&reg, WLAN_RESET, 0);
                rt2800_register_write(rt2x00dev, WLAN_FUN_CTRL, reg);
                udelay(10);
                rt2800_register_write(rt2x00dev, INT_SOURCE_CSR, 0x7fffffff);
        } while (count != 0);

        return 0;
}

void rt2800_mcu_request(struct rt2x00_dev *rt2x00dev,
                        const u8 command, const u8 token,
                        const u8 arg0, const u8 arg1)
{
        u32 reg;

        /*
         * SOC devices don't support MCU requests.
         */
        if (rt2x00_is_soc(rt2x00dev))
                return;

        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);
                rt2800_register_write_lock(rt2x00dev, H2M_MAILBOX_CSR, reg);

                reg = 0;
                rt2x00_set_field32(&reg, HOST_CMD_CSR_HOST_COMMAND, command);
                rt2800_register_write_lock(rt2x00dev, HOST_CMD_CSR, reg);
        }

        mutex_unlock(&rt2x00dev->csr_mutex);
}
EXPORT_SYMBOL_GPL(rt2800_mcu_request);

int rt2800_wait_csr_ready(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i = 0;
        u32 reg;

        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2800_register_read(rt2x00dev, MAC_CSR0, &reg);
                if (reg && reg != ~0)
                        return 0;
                msleep(1);
        }

        ERROR(rt2x00dev, "Unstable hardware.\n");
        return -EBUSY;
}
EXPORT_SYMBOL_GPL(rt2800_wait_csr_ready);

int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev)
{
        unsigned int i;
        u32 reg;

        /*
         * Some devices are really slow to respond here. Wait a whole second
         * before timing out.
         */
        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2800_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(10);
        }

        ERROR(rt2x00dev, "WPDMA TX/RX busy [0x%08x].\n", reg);
        return -EACCES;
}
EXPORT_SYMBOL_GPL(rt2800_wait_wpdma_ready);

void rt2800_disable_wpdma(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;

        rt2800_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_TX_WRITEBACK_DONE, 1);
        rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
}
EXPORT_SYMBOL_GPL(rt2800_disable_wpdma);

static bool rt2800_check_firmware_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;
}

int rt2800_check_firmware(struct rt2x00_dev *rt2x00dev,
                          const u8 *data, const size_t len)
{
        size_t offset = 0;
        size_t fw_len;
        bool multiple;

        /*
         * PCI(e) & SOC devices require firmware with a length
         * of 8kb. USB devices require firmware files with a length
         * of 4kb. Certain USB chipsets however require different firmware,
         * which Ralink only provides attached to the original firmware
         * file. Thus for USB devices, firmware files have a length
         * which is a multiple of 4kb. The firmware for rt3290 chip also
         * have a length which is a multiple of 4kb.
         */
        if (rt2x00_is_usb(rt2x00dev) || rt2x00_rt(rt2x00dev, RT3290))
                fw_len = 4096;
        else
                fw_len = 8192;

        multiple = true;
        /*
         * Validate the firmware length
         */
        if (len != fw_len && (!multiple || (len % fw_len) != 0))
                return FW_BAD_LENGTH;

        /*
         * Check if the chipset requires one of the upper parts
         * of the firmware.
         */
        if (rt2x00_is_usb(rt2x00dev) &&
            !rt2x00_rt(rt2x00dev, RT2860) &&
            !rt2x00_rt(rt2x00dev, RT2872) &&
            !rt2x00_rt(rt2x00dev, RT3070) &&
            ((len / fw_len) == 1))
                return FW_BAD_VERSION;

        /*
         * 8kb firmware files must be checked as if it were
         * 2 separate firmware files.
         */
        while (offset < len) {
                if (!rt2800_check_firmware_crc(data + offset, fw_len))
                        return FW_BAD_CRC;

                offset += fw_len;
        }

        return FW_OK;
}
EXPORT_SYMBOL_GPL(rt2800_check_firmware);

int rt2800_load_firmware(struct rt2x00_dev *rt2x00dev,
                         const u8 *data, const size_t len)
{
        unsigned int i;
        u32 reg;
        int retval;

        if (rt2x00_rt(rt2x00dev, RT3290)) {
                retval = rt2800_enable_wlan_rt3290(rt2x00dev);
                if (retval)
                        return -EBUSY;
        }

        /*
         * If driver doesn't wake up firmware here,
         * rt2800_load_firmware will hang forever when interface is up again.
         */
        rt2800_register_write(rt2x00dev, AUTOWAKEUP_CFG, 0x00000000);

        /*
         * Wait for stable hardware.
         */
        if (rt2800_wait_csr_ready(rt2x00dev))
                return -EBUSY;

        if (rt2x00_is_pci(rt2x00dev)) {
                if (rt2x00_rt(rt2x00dev, RT3290) ||
                    rt2x00_rt(rt2x00dev, RT3572) ||
                    rt2x00_rt(rt2x00dev, RT5390) ||
                    rt2x00_rt(rt2x00dev, RT5392)) {
                        rt2800_register_read(rt2x00dev, AUX_CTRL, &reg);
                        rt2x00_set_field32(&reg, AUX_CTRL_FORCE_PCIE_CLK, 1);
                        rt2x00_set_field32(&reg, AUX_CTRL_WAKE_PCIE_EN, 1);
                        rt2800_register_write(rt2x00dev, AUX_CTRL, reg);
                }
                rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000002);
        }

        rt2800_disable_wpdma(rt2x00dev);

        /*
         * Write firmware to the device.
         */
        rt2800_drv_write_firmware(rt2x00dev, data, len);

        /*
         * Wait for device to stabilize.
         */
        for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
                rt2800_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;
        }

        /*
         * Disable DMA, will be reenabled later when enabling
         * the radio.
         */
        rt2800_disable_wpdma(rt2x00dev);

        /*
         * Initialize firmware.
         */
        rt2800_register_write(rt2x00dev, H2M_BBP_AGENT, 0);
        rt2800_register_write(rt2x00dev, H2M_MAILBOX_CSR, 0);
        if (rt2x00_is_usb(rt2x00dev))
                rt2800_register_write(rt2x00dev, H2M_INT_SRC, 0);
        msleep(1);

        return 0;
}
EXPORT_SYMBOL_GPL(rt2800_load_firmware);

void rt2800_write_tx_data(struct queue_entry *entry,
                          struct txentry_desc *txdesc)
{
        __le32 *txwi = rt2800_drv_get_txwi(entry);
        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,
                           test_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags));
        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->u.ht.mpdu_density);
        rt2x00_set_field32(&word, TXWI_W0_TX_OP, txdesc->u.ht.txop);
        rt2x00_set_field32(&word, TXWI_W0_MCS, txdesc->u.ht.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->u.ht.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->u.ht.ba_size);
        rt2x00_set_field32(&word, TXWI_W1_WIRELESS_CLI_ID,
                           test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags) ?
                           txdesc->key_idx : txdesc->u.ht.wcid);
        rt2x00_set_field32(&word, TXWI_W1_MPDU_TOTAL_BYTE_COUNT,
                           txdesc->length);
        rt2x00_set_field32(&word, TXWI_W1_PACKETID_QUEUE, entry->queue->qid);
        rt2x00_set_field32(&word, TXWI_W1_PACKETID_ENTRY, (entry->entry_idx % 3) + 1);
        rt2x00_desc_write(txwi, 1, word);

        /*
         * Always write 0 to IV/EIV fields, hardware will insert the IV
         * from the IVEIV register when TXD_W3_WIV is set to 0.
         * When TXD_W3_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] */);
}
EXPORT_SYMBOL_GPL(rt2800_write_tx_data);

static int rt2800_agc_to_rssi(struct rt2x00_dev *rt2x00dev, u32 rxwi_w2)
{
        s8 rssi0 = rt2x00_get_field32(rxwi_w2, RXWI_W2_RSSI0);
        s8 rssi1 = rt2x00_get_field32(rxwi_w2, RXWI_W2_RSSI1);
        s8 rssi2 = rt2x00_get_field32(rxwi_w2, RXWI_W2_RSSI2);
        u16 eeprom;
        u8 offset0;
        u8 offset1;
        u8 offset2;

        if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG, &eeprom);
                offset0 = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG_OFFSET0);
                offset1 = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG_OFFSET1);
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_BG2, &eeprom);
                offset2 = rt2x00_get_field16(eeprom, EEPROM_RSSI_BG2_OFFSET2);
        } else {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_A, &eeprom);
                offset0 = rt2x00_get_field16(eeprom, EEPROM_RSSI_A_OFFSET0);
                offset1 = rt2x00_get_field16(eeprom, EEPROM_RSSI_A_OFFSET1);
                rt2x00_eeprom_read(rt2x00dev, EEPROM_RSSI_A2, &eeprom);
                offset2 = rt2x00_get_field16(eeprom, EEPROM_RSSI_A2_OFFSET2);
        }

        /*
         * Convert the value from the descriptor into the RSSI value
         * If the value in the descriptor is 0, it is considered invalid
         * and the default (extremely low) rssi value is assumed
         */
        rssi0 = (rssi0) ? (-12 - offset0 - rt2x00dev->lna_gain - rssi0) : -128;
        rssi1 = (rssi1) ? (-12 - offset1 - rt2x00dev->lna_gain - rssi1) : -128;
        rssi2 = (rssi2) ? (-12 - offset2 - rt2x00dev->lna_gain - rssi2) : -128;

        /*
         * mac80211 only accepts a single RSSI value. Calculating the
         * average doesn't deliver a fair answer either since -60:-60 would
         * be considered equally good as -50:-70 while the second is the one
         * which gives less energy...
         */
        rssi0 = max(rssi0, rssi1);
        return (int)max(rssi0, rssi2);
}

void rt2800_process_rxwi(struct queue_entry *entry,
                         struct rxdone_entry_desc *rxdesc)
{
        __le32 *rxwi = (__le32 *) entry->skb->data;
        u32 word;

        rt2x00_desc_read(rxwi, 0, &word);

        rxdesc->cipher = rt2x00_get_field32(word, RXWI_W0_UDF);
        rxdesc->size = rt2x00_get_field32(word, RXWI_W0_MPDU_TOTAL_BYTE_COUNT);

        rt2x00_desc_read(rxwi, 1, &word);

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

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

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

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

        rt2x00_desc_read(rxwi, 2, &word);

        /*
         * Convert descriptor AGC value to RSSI value.
         */
        rxdesc->rssi = rt2800_agc_to_rssi(entry->queue->rt2x00dev, word);

        /*
         * Remove RXWI descriptor from start of buffer.
         */
        skb_pull(entry->skb, RXWI_DESC_SIZE);
}
EXPORT_SYMBOL_GPL(rt2800_process_rxwi);

void rt2800_txdone_entry(struct queue_entry *entry, u32 status, __le32 *txwi)
{
        struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
        struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
        struct txdone_entry_desc txdesc;
        u32 word;
        u16 mcs, real_mcs;
        int aggr, ampdu;

        /*
         * Obtain the status about this packet.
         */
        txdesc.flags = 0;
        rt2x00_desc_read(txwi, 0, &word);

        mcs = rt2x00_get_field32(word, TXWI_W0_MCS);
        ampdu = rt2x00_get_field32(word, TXWI_W0_AMPDU);

        real_mcs = rt2x00_get_field32(status, TX_STA_FIFO_MCS);
        aggr = rt2x00_get_field32(status, TX_STA_FIFO_TX_AGGRE);

        /*
         * If a frame was meant to be sent as a single non-aggregated MPDU
         * but ended up in an aggregate the used tx rate doesn't correlate
         * with the one specified in the TXWI as the whole aggregate is sent
         * with the same rate.
         *
         * For example: two frames are sent to rt2x00, the first one sets
         * AMPDU=1 and requests MCS7 whereas the second frame sets AMDPU=0
         * and requests MCS15. If the hw aggregates both frames into one
         * AMDPU the tx status for both frames will contain MCS7 although
         * the frame was sent successfully.
         *
         * Hence, replace the requested rate with the real tx rate to not
         * confuse the rate control algortihm by providing clearly wrong
         * data.
         */
        if (unlikely(aggr == 1 && ampdu == 0 && real_mcs != mcs)) {
                skbdesc->tx_rate_idx = real_mcs;
                mcs = real_mcs;
        }

        if (aggr == 1 || ampdu == 1)
                __set_bit(TXDONE_AMPDU, &txdesc.flags);

        /*
         * Ralink has a retry mechanism using a global fallback
         * table. We setup this fallback table to try the immediate
         * lower rate for all rates. In the TX_STA_FIFO, the MCS field
         * always contains the MCS used for the last transmission, be
         * it successful or not.
         */
        if (rt2x00_get_field32(status, TX_STA_FIFO_TX_SUCCESS)) {
                /*
                 * Transmission succeeded. The number of retries is
                 * mcs - real_mcs
                 */
                __set_bit(TXDONE_SUCCESS, &txdesc.flags);
                txdesc.retry = ((mcs > real_mcs) ? mcs - real_mcs : 0);
        } else {
                /*
                 * Transmission failed. The number of retries is
                 * always 7 in this case (for a total number of 8
                 * frames sent).
                 */
                __set_bit(TXDONE_FAILURE, &txdesc.flags);
                txdesc.retry = rt2x00dev->long_retry;
        }

        /*
         * the frame was retried at least once
         * -> hw used fallback rates
         */
        if (txdesc.retry)
                __set_bit(TXDONE_FALLBACK, &txdesc.flags);

        rt2x00lib_txdone(entry, &txdesc);
}
EXPORT_SYMBOL_GPL(rt2800_txdone_entry);

void rt2800_write_beacon(struct queue_entry *entry, struct txentry_desc *txdesc)
{
        struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
        struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
        unsigned int beacon_base;
        unsigned int padding_len;
        u32 orig_reg, reg;

        /*
         * Disable beaconing while we are reloading the beacon data,
         * otherwise we might be sending out invalid data.
         */
        rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        orig_reg = reg;
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
        rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);

        /*
         * Add space for the TXWI in front of the skb.
         */
        memset(skb_push(entry->skb, TXWI_DESC_SIZE), 0, TXWI_DESC_SIZE);

        /*
         * Register descriptor details in skb frame descriptor.
         */
        skbdesc->flags |= SKBDESC_DESC_IN_SKB;
        skbdesc->desc = entry->skb->data;
        skbdesc->desc_len = TXWI_DESC_SIZE;

        /*
         * Add the TXWI for the beacon to the skb.
         */
        rt2800_write_tx_data(entry, txdesc);

        /*
         * Dump beacon to userspace through debugfs.
         */
        rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb);

        /*
         * Write entire beacon with TXWI and padding to register.
         */
        padding_len = roundup(entry->skb->len, 4) - entry->skb->len;
        if (padding_len && skb_pad(entry->skb, padding_len)) {
                ERROR(rt2x00dev, "Failure padding beacon, aborting\n");
                /* skb freed by skb_pad() on failure */
                entry->skb = NULL;
                rt2800_register_write(rt2x00dev, BCN_TIME_CFG, orig_reg);
                return;
        }

        beacon_base = HW_BEACON_OFFSET(entry->entry_idx);
        rt2800_register_multiwrite(rt2x00dev, beacon_base, entry->skb->data,
                                   entry->skb->len + padding_len);

        /*
         * Enable beaconing again.
         */
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
        rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);

        /*
         * Clean up beacon skb.
         */
        dev_kfree_skb_any(entry->skb);
        entry->skb = NULL;
}
EXPORT_SYMBOL_GPL(rt2800_write_beacon);

static inline void rt2800_clear_beacon_register(struct rt2x00_dev *rt2x00dev,
                                                unsigned int beacon_base)
{
        int i;

        /*
         * For the Beacon base registers we only need to clear
         * the whole TXWI which (when set to 0) will invalidate
         * the entire beacon.
         */
        for (i = 0; i < TXWI_DESC_SIZE; i += sizeof(__le32))
                rt2800_register_write(rt2x00dev, beacon_base + i, 0);
}

void rt2800_clear_beacon(struct queue_entry *entry)
{
        struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
        u32 reg;

        /*
         * Disable beaconing while we are reloading the beacon data,
         * otherwise we might be sending out invalid data.
         */
        rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 0);
        rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);

        /*
         * Clear beacon.
         */
        rt2800_clear_beacon_register(rt2x00dev,
                                     HW_BEACON_OFFSET(entry->entry_idx));

        /*
         * Enabled beaconing again.
         */
        rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_GEN, 1);
        rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
}
EXPORT_SYMBOL_GPL(rt2800_clear_beacon);

#ifdef CONFIG_RT2X00_LIB_DEBUGFS
const struct rt2x00debug rt2800_rt2x00debug = {
        .owner  = THIS_MODULE,
        .csr    = {
                .read           = rt2800_register_read,
                .write          = rt2800_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           = rt2800_bbp_read,
                .write          = rt2800_bbp_write,
                .word_base      = BBP_BASE,
                .word_size      = sizeof(u8),
                .word_count     = BBP_SIZE / sizeof(u8),
        },
        .rf     = {
                .read           = rt2x00_rf_read,
                .write          = rt2800_rf_write,
                .word_base      = RF_BASE,
                .word_size      = sizeof(u32),
                .word_count     = RF_SIZE / sizeof(u32),
        },
        .rfcsr  = {
                .read           = rt2800_rfcsr_read,
                .write          = rt2800_rfcsr_write,
                .word_base      = RFCSR_BASE,
                .word_size      = sizeof(u8),
                .word_count     = RFCSR_SIZE / sizeof(u8),
        },
};
EXPORT_SYMBOL_GPL(rt2800_rt2x00debug);
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */

int rt2800_rfkill_poll(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;

        if (rt2x00_rt(rt2x00dev, RT3290)) {
                rt2800_register_read(rt2x00dev, WLAN_FUN_CTRL, &reg);
                return rt2x00_get_field32(reg, WLAN_GPIO_IN_BIT0);
        } else {
                rt2800_register_read(rt2x00dev, GPIO_CTRL, &reg);
                return rt2x00_get_field32(reg, GPIO_CTRL_VAL2);
        }
}
EXPORT_SYMBOL_GPL(rt2800_rfkill_poll);

#ifdef CONFIG_RT2X00_LIB_LEDS
static void rt2800_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);
        u32 reg;

        /* Check for SoC (SOC devices don't support MCU requests) */
        if (rt2x00_is_soc(led->rt2x00dev)) {
                rt2800_register_read(led->rt2x00dev, LED_CFG, &reg);

                /* Set LED Polarity */
                rt2x00_set_field32(&reg, LED_CFG_LED_POLAR, polarity);

                /* Set LED Mode */
                if (led->type == LED_TYPE_RADIO) {
                        rt2x00_set_field32(&reg, LED_CFG_G_LED_MODE,
                                           enabled ? 3 : 0);
                } else if (led->type == LED_TYPE_ASSOC) {
                        rt2x00_set_field32(&reg, LED_CFG_Y_LED_MODE,
                                           enabled ? 3 : 0);
                } else if (led->type == LED_TYPE_QUALITY) {
                        rt2x00_set_field32(&reg, LED_CFG_R_LED_MODE,
                                           enabled ? 3 : 0);
                }

                rt2800_register_write(led->rt2x00dev, LED_CFG, reg);

        } else {
                if (led->type == LED_TYPE_RADIO) {
                        rt2800_mcu_request(led->rt2x00dev, MCU_LED, 0xff, ledmode,
                                              enabled ? 0x20 : 0);
                } else if (led->type == LED_TYPE_ASSOC) {
                        rt2800_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
                         */
                        rt2800_mcu_request(led->rt2x00dev, MCU_LED_STRENGTH, 0xff,
                                              (1 << brightness / (LED_FULL / 6)) - 1,
                                              polarity);
                }
        }
}

static void rt2800_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 = rt2800_brightness_set;
        led->flags = LED_INITIALIZED;
}

#endif /* CONFIG_RT2X00_LIB_LEDS */

/*
 * Configuration handlers.
 */
static void rt2800_config_wcid(struct rt2x00_dev *rt2x00dev,
                               const u8 *address,
                               int wcid)
{
        struct mac_wcid_entry wcid_entry;
        u32 offset;

        offset = MAC_WCID_ENTRY(wcid);

        memset(&wcid_entry, 0xff, sizeof(wcid_entry));
        if (address)
                memcpy(wcid_entry.mac, address, ETH_ALEN);

        rt2800_register_multiwrite(rt2x00dev, offset,
                                      &wcid_entry, sizeof(wcid_entry));
}

static void rt2800_delete_wcid_attr(struct rt2x00_dev *rt2x00dev, int wcid)
{
        u32 offset;
        offset = MAC_WCID_ATTR_ENTRY(wcid);
        rt2800_register_write(rt2x00dev, offset, 0);
}

static void rt2800_config_wcid_attr_bssidx(struct rt2x00_dev *rt2x00dev,
                                           int wcid, u32 bssidx)
{
        u32 offset = MAC_WCID_ATTR_ENTRY(wcid);
        u32 reg;

        /*
         * The BSS Idx numbers is split in a main value of 3 bits,
         * and a extended field for adding one additional bit to the value.
         */
        rt2800_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX, (bssidx & 0x7));
        rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX_EXT,
                           (bssidx & 0x8) >> 3);
        rt2800_register_write(rt2x00dev, offset, reg);
}

static void rt2800_config_wcid_attr_cipher(struct rt2x00_dev *rt2x00dev,
                                           struct rt2x00lib_crypto *crypto,
                                           struct ieee80211_key_conf *key)
{
        struct mac_iveiv_entry iveiv_entry;
        u32 offset;
        u32 reg;

        offset = MAC_WCID_ATTR_ENTRY(key->hw_key_idx);

        if (crypto->cmd == SET_KEY) {
                rt2800_register_read(rt2x00dev, offset, &reg);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_KEYTAB,
                                   !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
                /*
                 * Both the cipher as the BSS Idx numbers are split in a main
                 * value of 3 bits, and a extended field for adding one additional
                 * bit to the value.
                 */
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER,
                                   (crypto->cipher & 0x7));
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER_EXT,
                                   (crypto->cipher & 0x8) >> 3);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_RX_WIUDF, crypto->cipher);
                rt2800_register_write(rt2x00dev, offset, reg);
        } else {
                /* Delete the cipher without touching the bssidx */
                rt2800_register_read(rt2x00dev, offset, &reg);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_KEYTAB, 0);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER, 0);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER_EXT, 0);
                rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_RX_WIUDF, 0);
                rt2800_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;
        rt2800_register_multiwrite(rt2x00dev, offset,
                                      &iveiv_entry, sizeof(iveiv_entry));
}

int rt2800_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;
        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);
                rt2800_register_multiwrite(rt2x00dev, offset,
                                              &key_entry, sizeof(key_entry));
        }

        /*
         * 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);

        rt2800_register_read(rt2x00dev, offset, &reg);
        rt2x00_set_field32(&reg, field,
                           (crypto->cmd == SET_KEY) * crypto->cipher);
        rt2800_register_write(rt2x00dev, offset, reg);

        /*
         * Update WCID information
         */
        rt2800_config_wcid(rt2x00dev, crypto->address, key->hw_key_idx);
        rt2800_config_wcid_attr_bssidx(rt2x00dev, key->hw_key_idx,
                                       crypto->bssidx);
        rt2800_config_wcid_attr_cipher(rt2x00dev, crypto, key);

        return 0;
}
EXPORT_SYMBOL_GPL(rt2800_config_shared_key);

static inline int rt2800_find_wcid(struct rt2x00_dev *rt2x00dev)
{
        struct mac_wcid_entry wcid_entry;
        int idx;
        u32 offset;

        /*
         * Search for the first free WCID entry and return the corresponding
         * index.
         *
         * Make sure the WCID starts _after_ the last possible shared key
         * entry (>32).
         *
         * Since parts of the pairwise key table might be shared with
         * the beacon frame buffers 6 & 7 we should only write into the
         * first 222 entries.
         */
        for (idx = 33; idx <= 222; idx++) {
                offset = MAC_WCID_ENTRY(idx);
                rt2800_register_multiread(rt2x00dev, offset, &wcid_entry,
                                          sizeof(wcid_entry));
                if (is_broadcast_ether_addr(wcid_entry.mac))
                        return idx;
        }

        /*
         * Use -1 to indicate that we don't have any more space in the WCID
         * table.
         */
        return -1;
}

int rt2800_config_pairwise_key(struct rt2x00_dev *rt2x00dev,
                               struct rt2x00lib_crypto *crypto,
                               struct ieee80211_key_conf *key)
{
        struct hw_key_entry key_entry;
        u32 offset;

        if (crypto->cmd == SET_KEY) {
                /*
                 * Allow key configuration only for STAs that are
                 * known by the hw.
                 */
                if (crypto->wcid < 0)
                        return -ENOSPC;
                key->hw_key_idx = crypto->wcid;

                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);
                rt2800_register_multiwrite(rt2x00dev, offset,
                                              &key_entry, sizeof(key_entry));
        }

        /*
         * Update WCID information
         */
        rt2800_config_wcid_attr_cipher(rt2x00dev, crypto, key);

        return 0;
}
EXPORT_SYMBOL_GPL(rt2800_config_pairwise_key);

int rt2800_sta_add(struct rt2x00_dev *rt2x00dev, struct ieee80211_vif *vif,
                   struct ieee80211_sta *sta)
{
        int wcid;
        struct rt2x00_sta *sta_priv = sta_to_rt2x00_sta(sta);

        /*
         * Find next free WCID.
         */
        wcid = rt2800_find_wcid(rt2x00dev);

        /*
         * Store selected wcid even if it is invalid so that we can
         * later decide if the STA is uploaded into the hw.
         */
        sta_priv->wcid = wcid;

        /*
         * No space left in the device, however, we can still communicate
         * with the STA -> No error.
         */
        if (wcid < 0)
                return 0;

        /*
         * Clean up WCID attributes and write STA address to the device.
         */
        rt2800_delete_wcid_attr(rt2x00dev, wcid);
        rt2800_config_wcid(rt2x00dev, sta->addr, wcid);
        rt2800_config_wcid_attr_bssidx(rt2x00dev, wcid,
                                       rt2x00lib_get_bssidx(rt2x00dev, vif));
        return 0;
}
EXPORT_SYMBOL_GPL(rt2800_sta_add);

int rt2800_sta_remove(struct rt2x00_dev *rt2x00dev, int wcid)
{
        /*
         * Remove WCID entry, no need to clean the attributes as they will
         * get renewed when the WCID is reused.
         */
        rt2800_config_wcid(rt2x00dev, NULL, wcid);

        return 0;
}
EXPORT_SYMBOL_GPL(rt2800_sta_remove);

void rt2800_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.
         */
        rt2800_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,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_BAR,
                           !(filter_flags & FIF_CONTROL));
        rt2x00_set_field32(&reg, RX_FILTER_CFG_DROP_CNTL,
                           !(filter_flags & FIF_CONTROL));
        rt2800_register_write(rt2x00dev, RX_FILTER_CFG, reg);
}
EXPORT_SYMBOL_GPL(rt2800_config_filter);

void rt2800_config_intf(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf,
                        struct rt2x00intf_conf *conf, const unsigned int flags)
{
        u32 reg;
        bool update_bssid = false;

        if (flags & CONFIG_UPDATE_TYPE) {
                /*
                 * Enable synchronisation.
                 */
                rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_TSF_SYNC, conf->sync);
                rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);

                if (conf->sync == TSF_SYNC_AP_NONE) {
                        /*
                         * Tune beacon queue transmit parameters for AP mode
                         */
                        rt2800_register_read(rt2x00dev, TBTT_SYNC_CFG, &reg);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_CWMIN, 0);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_AIFSN, 1);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_EXP_WIN, 32);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_TBTT_ADJUST, 0);
                        rt2800_register_write(rt2x00dev, TBTT_SYNC_CFG, reg);
                } else {
                        rt2800_register_read(rt2x00dev, TBTT_SYNC_CFG, &reg);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_CWMIN, 4);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_AIFSN, 2);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_BCN_EXP_WIN, 32);
                        rt2x00_set_field32(&reg, TBTT_SYNC_CFG_TBTT_ADJUST, 16);
                        rt2800_register_write(rt2x00dev, TBTT_SYNC_CFG, reg);
                }
        }

        if (flags & CONFIG_UPDATE_MAC) {
                if (flags & CONFIG_UPDATE_TYPE &&
                    conf->sync == TSF_SYNC_AP_NONE) {
                        /*
                         * The BSSID register has to be set to our own mac
                         * address in AP mode.
                         */
                        memcpy(conf->bssid, conf->mac, sizeof(conf->mac));
                        update_bssid = true;
                }

                if (!is_zero_ether_addr((const u8 *)conf->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);
                }

                rt2800_register_multiwrite(rt2x00dev, MAC_ADDR_DW0,
                                              conf->mac, sizeof(conf->mac));
        }

        if ((flags & CONFIG_UPDATE_BSSID) || update_bssid) {
                if (!is_zero_ether_addr((const u8 *)conf->bssid)) {
                        reg = le32_to_cpu(conf->bssid[1]);
                        rt2x00_set_field32(&reg, MAC_BSSID_DW1_BSS_ID_MASK, 3);
                        rt2x00_set_field32(&reg, MAC_BSSID_DW1_BSS_BCN_NUM, 7);
                        conf->bssid[1] = cpu_to_le32(reg);
                }

                rt2800_register_multiwrite(rt2x00dev, MAC_BSSID_DW0,
                                              conf->bssid, sizeof(conf->bssid));
        }
}
EXPORT_SYMBOL_GPL(rt2800_config_intf);

static void rt2800_config_ht_opmode(struct rt2x00_dev *rt2x00dev,
                                    struct rt2x00lib_erp *erp)
{
        bool any_sta_nongf = !!(erp->ht_opmode &
                                IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
        u8 protection = erp->ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION;
        u8 mm20_mode, mm40_mode, gf20_mode, gf40_mode;
        u16 mm20_rate, mm40_rate, gf20_rate, gf40_rate;
        u32 reg;

        /* default protection rate for HT20: OFDM 24M */
        mm20_rate = gf20_rate = 0x4004;

        /* default protection rate for HT40: duplicate OFDM 24M */
        mm40_rate = gf40_rate = 0x4084;

        switch (protection) {
        case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
                /*
                 * All STAs in this BSS are HT20/40 but there might be
                 * STAs not supporting greenfield mode.
                 * => Disable protection for HT transmissions.
                 */
                mm20_mode = mm40_mode = gf20_mode = gf40_mode = 0;

                break;
        case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
                /*
                 * All STAs in this BSS are HT20 or HT20/40 but there
                 * might be STAs not supporting greenfield mode.
                 * => Protect all HT40 transmissions.
                 */
                mm20_mode = gf20_mode = 0;
                mm40_mode = gf40_mode = 2;

                break;
        case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
                /*
                 * Nonmember protection:
                 * According to 802.11n we _should_ protect all
                 * HT transmissions (but we don't have to).
                 *
                 * But if cts_protection is enabled we _shall_ protect
                 * all HT transmissions using a CCK rate.
                 *
                 * And if any station is non GF we _shall_ protect
                 * GF transmissions.
                 *
                 * We decide to protect everything
                 * -> fall through to mixed mode.
                 */
        case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
                /*
                 * Legacy STAs are present
                 * => Protect all HT transmissions.
                 */
                mm20_mode = mm40_mode = gf20_mode = gf40_mode = 2;

                /*
                 * If erp protection is needed we have to protect HT
                 * transmissions with CCK 11M long preamble.
                 */
                if (erp->cts_protection) {
                        /* don't duplicate RTS/CTS in CCK mode */
                        mm20_rate = mm40_rate = 0x0003;
                        gf20_rate = gf40_rate = 0x0003;
                }
                break;
        }

        /* check for STAs not supporting greenfield mode */
        if (any_sta_nongf)
                gf20_mode = gf40_mode = 2;

        /* Update HT protection config */
        rt2800_register_read(rt2x00dev, MM20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_PROTECT_RATE, mm20_rate);
        rt2x00_set_field32(&reg, MM20_PROT_CFG_PROTECT_CTRL, mm20_mode);
        rt2800_register_write(rt2x00dev, MM20_PROT_CFG, reg);

        rt2800_register_read(rt2x00dev, MM40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_PROTECT_RATE, mm40_rate);
        rt2x00_set_field32(&reg, MM40_PROT_CFG_PROTECT_CTRL, mm40_mode);
        rt2800_register_write(rt2x00dev, MM40_PROT_CFG, reg);

        rt2800_register_read(rt2x00dev, GF20_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_PROTECT_RATE, gf20_rate);
        rt2x00_set_field32(&reg, GF20_PROT_CFG_PROTECT_CTRL, gf20_mode);
        rt2800_register_write(rt2x00dev, GF20_PROT_CFG, reg);

        rt2800_register_read(rt2x00dev, GF40_PROT_CFG, &reg);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_PROTECT_RATE, gf40_rate);
        rt2x00_set_field32(&reg, GF40_PROT_CFG_PROTECT_CTRL, gf40_mode);
        rt2800_register_write(rt2x00dev, GF40_PROT_CFG, reg);
}

void rt2800_config_erp(struct rt2x00_dev *rt2x00dev, struct rt2x00lib_erp *erp,
                       u32 changed)
{
        u32 reg;

        if (changed & BSS_CHANGED_ERP_PREAMBLE) {
                rt2800_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);
                rt2800_register_write(rt2x00dev, AUTO_RSP_CFG, reg);
        }

        if (changed & BSS_CHANGED_ERP_CTS_PROT) {
                rt2800_register_read(rt2x00dev, OFDM_PROT_CFG, &reg);
                rt2x00_set_field32(&reg, OFDM_PROT_CFG_PROTECT_CTRL,
                                   erp->cts_protection ? 2 : 0);
                rt2800_register_write(rt2x00dev, OFDM_PROT_CFG, reg);
        }

        if (changed & BSS_CHANGED_BASIC_RATES) {
                rt2800_register_write(rt2x00dev, LEGACY_BASIC_RATE,
                                         erp->basic_rates);
                rt2800_register_write(rt2x00dev, HT_BASIC_RATE, 0x00008003);
        }

        if (changed & BSS_CHANGED_ERP_SLOT) {
                rt2800_register_read(rt2x00dev, BKOFF_SLOT_CFG, &reg);
                rt2x00_set_field32(&reg, BKOFF_SLOT_CFG_SLOT_TIME,
                                   erp->slot_time);
                rt2800_register_write(rt2x00dev, BKOFF_SLOT_CFG, reg);

                rt2800_register_read(rt2x00dev, XIFS_TIME_CFG, &reg);
                rt2x00_set_field32(&reg, XIFS_TIME_CFG_EIFS, erp->eifs);
                rt2800_register_write(rt2x00dev, XIFS_TIME_CFG, reg);
        }

        if (changed & BSS_CHANGED_BEACON_INT) {
                rt2800_register_read(rt2x00dev, BCN_TIME_CFG, &reg);
                rt2x00_set_field32(&reg, BCN_TIME_CFG_BEACON_INTERVAL,
                                   erp->beacon_int * 16);
                rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg);
        }

        if (changed & BSS_CHANGED_HT)
                rt2800_config_ht_opmode(rt2x00dev, erp);
}
EXPORT_SYMBOL_GPL(rt2800_config_erp);

static void rt2800_config_3572bt_ant(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;
        u16 eeprom;
        u8 led_ctrl, led_g_mode, led_r_mode;

        rt2800_register_read(rt2x00dev, GPIO_SWITCH, &reg);
        if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
                rt2x00_set_field32(&reg, GPIO_SWITCH_0, 1);
                rt2x00_set_field32(&reg, GPIO_SWITCH_1, 1);
        } else {
                rt2x00_set_field32(&reg, GPIO_SWITCH_0, 0);
                rt2x00_set_field32(&reg, GPIO_SWITCH_1, 0);
        }
        rt2800_register_write(rt2x00dev, GPIO_SWITCH, reg);

        rt2800_register_read(rt2x00dev, LED_CFG, &reg);
        led_g_mode = rt2x00_get_field32(reg, LED_CFG_LED_POLAR) ? 3 : 0;
        led_r_mode = rt2x00_get_field32(reg, LED_CFG_LED_POLAR) ? 0 : 3;
        if (led_g_mode != rt2x00_get_field32(reg, LED_CFG_G_LED_MODE) ||
            led_r_mode != rt2x00_get_field32(reg, LED_CFG_R_LED_MODE)) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ, &eeprom);
                led_ctrl = rt2x00_get_field16(eeprom, EEPROM_FREQ_LED_MODE);
                if (led_ctrl == 0 || led_ctrl > 0x40) {
                        rt2x00_set_field32(&reg, LED_CFG_G_LED_MODE, led_g_mode);
                        rt2x00_set_field32(&reg, LED_CFG_R_LED_MODE, led_r_mode);
                        rt2800_register_write(rt2x00dev, LED_CFG, reg);
                } else {
                        rt2800_mcu_request(rt2x00dev, MCU_BAND_SELECT, 0xff,
                                           (led_g_mode << 2) | led_r_mode, 1);
                }
        }
}

static void rt2800_set_ant_diversity(struct rt2x00_dev *rt2x00dev,
                                     enum antenna ant)
{
        u32 reg;
        u8 eesk_pin = (ant == ANTENNA_A) ? 1 : 0;
        u8 gpio_bit3 = (ant == ANTENNA_A) ? 0 : 1;

        if (rt2x00_is_pci(rt2x00dev)) {
                rt2800_register_read(rt2x00dev, E2PROM_CSR, &reg);
                rt2x00_set_field32(&reg, E2PROM_CSR_DATA_CLOCK, eesk_pin);
                rt2800_register_write(rt2x00dev, E2PROM_CSR, reg);
        } else if (rt2x00_is_usb(rt2x00dev))
                rt2800_mcu_request(rt2x00dev, MCU_ANT_SELECT, 0xff,
                                   eesk_pin, 0);

        rt2800_register_read(rt2x00dev, GPIO_CTRL, &reg);
        rt2x00_set_field32(&reg, GPIO_CTRL_DIR3, 0);
        rt2x00_set_field32(&reg, GPIO_CTRL_VAL3, gpio_bit3);
        rt2800_register_write(rt2x00dev, GPIO_CTRL, reg);
}

void rt2800_config_ant(struct rt2x00_dev *rt2x00dev, struct antenna_setup *ant)
{
        u8 r1;
        u8 r3;
        u16 eeprom;

        rt2800_bbp_read(rt2x00dev, 1, &r1);
        rt2800_bbp_read(rt2x00dev, 3, &r3);

        if (rt2x00_rt(rt2x00dev, RT3572) &&
            test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags))
                rt2800_config_3572bt_ant(rt2x00dev);

        /*
         * Configure the TX antenna.
         */
        switch (ant->tx_chain_num) {
        case 1:
                rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 0);
                break;
        case 2:
                if (rt2x00_rt(rt2x00dev, RT3572) &&
                    test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags))
                        rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 1);
                else
                        rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 2);
                break;
        case 3:
                rt2x00_set_field8(&r1, BBP1_TX_ANTENNA, 0);
                break;
        }

        /*
         * Configure the RX antenna.
         */
        switch (ant->rx_chain_num) {
        case 1:
                if (rt2x00_rt(rt2x00dev, RT3070) ||
                    rt2x00_rt(rt2x00dev, RT3090) ||
                    rt2x00_rt(rt2x00dev, RT3352) ||
                    rt2x00_rt(rt2x00dev, RT3390)) {
                        rt2x00_eeprom_read(rt2x00dev,
                                           EEPROM_NIC_CONF1, &eeprom);
                        if (rt2x00_get_field16(eeprom,
                                                EEPROM_NIC_CONF1_ANT_DIVERSITY))
                                rt2800_set_ant_diversity(rt2x00dev,
                                                rt2x00dev->default_ant.rx);
                }
                rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 0);
                break;
        case 2:
                if (rt2x00_rt(rt2x00dev, RT3572) &&
                    test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags)) {
                        rt2x00_set_field8(&r3, BBP3_RX_ADC, 1);
                        rt2x00_set_field8(&r3, BBP3_RX_ANTENNA,
                                rt2x00dev->curr_band == IEEE80211_BAND_5GHZ);
                        rt2800_set_ant_diversity(rt2x00dev, ANTENNA_B);
                } else {
                        rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 1);
                }
                break;
        case 3:
                rt2x00_set_field8(&r3, BBP3_RX_ANTENNA, 2);
                break;
        }

        rt2800_bbp_write(rt2x00dev, 3, r3);
        rt2800_bbp_write(rt2x00dev, 1, r1);
}
EXPORT_SYMBOL_GPL(rt2800_config_ant);

static void rt2800_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 rt2800_config_channel_rf2xxx(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_chain_num == 1)
                rt2x00_set_field32(&rf->rf2, RF2_ANTENNA_TX1, 1);

        if (rt2x00dev->default_ant.rx_chain_num == 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_chain_num == 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 (Minimum 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->default_power1 >= 0));

                if (info->default_power1 < 0)
                        info->default_power1 += 7;

                rt2x00_set_field32(&rf->rf3, RF3_TXPOWER_A, info->default_power1);

                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_A_7DBM_BOOST,
                                   (info->default_power2 >= 0));

                if (info->default_power2 < 0)
                        info->default_power2 += 7;

                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_A, info->default_power2);
        } else {
                rt2x00_set_field32(&rf->rf3, RF3_TXPOWER_G, info->default_power1);
                rt2x00_set_field32(&rf->rf4, RF4_TXPOWER_G, info->default_power2);
        }

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

        rt2800_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800_rf_write(rt2x00dev, 3, rf->rf3 & ~0x00000004);
        rt2800_rf_write(rt2x00dev, 4, rf->rf4);

        udelay(200);

        rt2800_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800_rf_write(rt2x00dev, 3, rf->rf3 | 0x00000004);
        rt2800_rf_write(rt2x00dev, 4, rf->rf4);

        udelay(200);

        rt2800_rf_write(rt2x00dev, 1, rf->rf1);
        rt2800_rf_write(rt2x00dev, 2, rf->rf2);
        rt2800_rf_write(rt2x00dev, 3, rf->rf3 & ~0x00000004);
        rt2800_rf_write(rt2x00dev, 4, rf->rf4);
}

static void rt2800_config_channel_rf3xxx(struct rt2x00_dev *rt2x00dev,
                                         struct ieee80211_conf *conf,
                                         struct rf_channel *rf,
                                         struct channel_info *info)
{
        struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
        u8 rfcsr, calib_tx, calib_rx;

        rt2800_rfcsr_write(rt2x00dev, 2, rf->rf1);

        rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR3_K, rf->rf3);
        rt2800_rfcsr_write(rt2x00dev, 3, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 6, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR6_R1, rf->rf2);
        rt2800_rfcsr_write(rt2x00dev, 6, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 12, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR12_TX_POWER, info->default_power1);
        rt2800_rfcsr_write(rt2x00dev, 12, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 13, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR13_TX_POWER, info->default_power2);
        rt2800_rfcsr_write(rt2x00dev, 13, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD,
                          rt2x00dev->default_ant.rx_chain_num <= 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX2_PD,
                          rt2x00dev->default_ant.rx_chain_num <= 2);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX0_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD,
                          rt2x00dev->default_ant.tx_chain_num <= 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX2_PD,
                          rt2x00dev->default_ant.tx_chain_num <= 2);
        rt2800_rfcsr_write(rt2x00dev, 1, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
        msleep(1);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 0);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 23, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR23_FREQ_OFFSET, rt2x00dev->freq_offset);
        rt2800_rfcsr_write(rt2x00dev, 23, rfcsr);

        if (rt2x00_rt(rt2x00dev, RT3390)) {
                calib_tx = conf_is_ht40(conf) ? 0x68 : 0x4f;
                calib_rx = conf_is_ht40(conf) ? 0x6f : 0x4f;
        } else {
                if (conf_is_ht40(conf)) {
                        calib_tx = drv_data->calibration_bw40;
                        calib_rx = drv_data->calibration_bw40;
                } else {
                        calib_tx = drv_data->calibration_bw20;
                        calib_rx = drv_data->calibration_bw20;
                }
        }

        rt2800_rfcsr_read(rt2x00dev, 24, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR24_TX_CALIB, calib_tx);
        rt2800_rfcsr_write(rt2x00dev, 24, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 31, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR31_RX_CALIB, calib_rx);
        rt2800_rfcsr_write(rt2x00dev, 31, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1);
        rt2800_rfcsr_write(rt2x00dev, 7, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
        msleep(1);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 0);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
}

static void rt2800_config_channel_rf3052(struct rt2x00_dev *rt2x00dev,
                                         struct ieee80211_conf *conf,
                                         struct rf_channel *rf,
                                         struct channel_info *info)
{
        struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
        u8 rfcsr;
        u32 reg;

        if (rf->channel <= 14) {
                rt2800_bbp_write(rt2x00dev, 25, drv_data->bbp25);
                rt2800_bbp_write(rt2x00dev, 26, drv_data->bbp26);
        } else {
                rt2800_bbp_write(rt2x00dev, 25, 0x09);
                rt2800_bbp_write(rt2x00dev, 26, 0xff);
        }

        rt2800_rfcsr_write(rt2x00dev, 2, rf->rf1);
        rt2800_rfcsr_write(rt2x00dev, 3, rf->rf3);

        rt2800_rfcsr_read(rt2x00dev, 6, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR6_R1, rf->rf2);
        if (rf->channel <= 14)
                rt2x00_set_field8(&rfcsr, RFCSR6_TXDIV, 2);
        else
                rt2x00_set_field8(&rfcsr, RFCSR6_TXDIV, 1);
        rt2800_rfcsr_write(rt2x00dev, 6, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 5, &rfcsr);
        if (rf->channel <= 14)
                rt2x00_set_field8(&rfcsr, RFCSR5_R1, 1);
        else
                rt2x00_set_field8(&rfcsr, RFCSR5_R1, 2);
        rt2800_rfcsr_write(rt2x00dev, 5, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 12, &rfcsr);
        if (rf->channel <= 14) {
                rt2x00_set_field8(&rfcsr, RFCSR12_DR0, 3);
                rt2x00_set_field8(&rfcsr, RFCSR12_TX_POWER,
                                  info->default_power1);
        } else {
                rt2x00_set_field8(&rfcsr, RFCSR12_DR0, 7);
                rt2x00_set_field8(&rfcsr, RFCSR12_TX_POWER,
                                (info->default_power1 & 0x3) |
                                ((info->default_power1 & 0xC) << 1));
        }
        rt2800_rfcsr_write(rt2x00dev, 12, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 13, &rfcsr);
        if (rf->channel <= 14) {
                rt2x00_set_field8(&rfcsr, RFCSR13_DR0, 3);
                rt2x00_set_field8(&rfcsr, RFCSR13_TX_POWER,
                                  info->default_power2);
        } else {
                rt2x00_set_field8(&rfcsr, RFCSR13_DR0, 7);
                rt2x00_set_field8(&rfcsr, RFCSR13_TX_POWER,
                                (info->default_power2 & 0x3) |
                                ((info->default_power2 & 0xC) << 1));
        }
        rt2800_rfcsr_write(rt2x00dev, 13, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX0_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX2_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX2_PD, 0);
        if (test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags)) {
                if (rf->channel <= 14) {
                        rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 1);
                        rt2x00_set_field8(&rfcsr, RFCSR1_TX0_PD, 1);
                }
                rt2x00_set_field8(&rfcsr, RFCSR1_RX2_PD, 1);
                rt2x00_set_field8(&rfcsr, RFCSR1_TX2_PD, 1);
        } else {
                switch (rt2x00dev->default_ant.tx_chain_num) {
                case 1:
                        rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD, 1);
                case 2:
                        rt2x00_set_field8(&rfcsr, RFCSR1_TX2_PD, 1);
                        break;
                }

                switch (rt2x00dev->default_ant.rx_chain_num) {
                case 1:
                        rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD, 1);
                case 2:
                        rt2x00_set_field8(&rfcsr, RFCSR1_RX2_PD, 1);
                        break;
                }
        }
        rt2800_rfcsr_write(rt2x00dev, 1, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 23, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR23_FREQ_OFFSET, rt2x00dev->freq_offset);
        rt2800_rfcsr_write(rt2x00dev, 23, rfcsr);

        if (conf_is_ht40(conf)) {
                rt2800_rfcsr_write(rt2x00dev, 24, drv_data->calibration_bw40);
                rt2800_rfcsr_write(rt2x00dev, 31, drv_data->calibration_bw40);
        } else {
                rt2800_rfcsr_write(rt2x00dev, 24, drv_data->calibration_bw20);
                rt2800_rfcsr_write(rt2x00dev, 31, drv_data->calibration_bw20);
        }

        if (rf->channel <= 14) {
                rt2800_rfcsr_write(rt2x00dev, 7, 0xd8);
                rt2800_rfcsr_write(rt2x00dev, 9, 0xc3);
                rt2800_rfcsr_write(rt2x00dev, 10, 0xf1);
                rt2800_rfcsr_write(rt2x00dev, 11, 0xb9);
                rt2800_rfcsr_write(rt2x00dev, 15, 0x53);
                rfcsr = 0x4c;
                rt2x00_set_field8(&rfcsr, RFCSR16_TXMIXER_GAIN,
                                  drv_data->txmixer_gain_24g);
                rt2800_rfcsr_write(rt2x00dev, 16, rfcsr);
                rt2800_rfcsr_write(rt2x00dev, 17, 0x23);
                rt2800_rfcsr_write(rt2x00dev, 19, 0x93);
                rt2800_rfcsr_write(rt2x00dev, 20, 0xb3);
                rt2800_rfcsr_write(rt2x00dev, 25, 0x15);
                rt2800_rfcsr_write(rt2x00dev, 26, 0x85);
                rt2800_rfcsr_write(rt2x00dev, 27, 0x00);
                rt2800_rfcsr_write(rt2x00dev, 29, 0x9b);
        } else {
                rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR7_BIT2, 1);
                rt2x00_set_field8(&rfcsr, RFCSR7_BIT3, 0);
                rt2x00_set_field8(&rfcsr, RFCSR7_BIT4, 1);
                rt2x00_set_field8(&rfcsr, RFCSR7_BITS67, 0);
                rt2800_rfcsr_write(rt2x00dev, 7, rfcsr);
                rt2800_rfcsr_write(rt2x00dev, 9, 0xc0);
                rt2800_rfcsr_write(rt2x00dev, 10, 0xf1);
                rt2800_rfcsr_write(rt2x00dev, 11, 0x00);
                rt2800_rfcsr_write(rt2x00dev, 15, 0x43);
                rfcsr = 0x7a;
                rt2x00_set_field8(&rfcsr, RFCSR16_TXMIXER_GAIN,
                                  drv_data->txmixer_gain_5g);
                rt2800_rfcsr_write(rt2x00dev, 16, rfcsr);
                rt2800_rfcsr_write(rt2x00dev, 17, 0x23);
                if (rf->channel <= 64) {
                        rt2800_rfcsr_write(rt2x00dev, 19, 0xb7);
                        rt2800_rfcsr_write(rt2x00dev, 20, 0xf6);
                        rt2800_rfcsr_write(rt2x00dev, 25, 0x3d);
                } else if (rf->channel <= 128) {
                        rt2800_rfcsr_write(rt2x00dev, 19, 0x74);
                        rt2800_rfcsr_write(rt2x00dev, 20, 0xf4);
                        rt2800_rfcsr_write(rt2x00dev, 25, 0x01);
                } else {
                        rt2800_rfcsr_write(rt2x00dev, 19, 0x72);
                        rt2800_rfcsr_write(rt2x00dev, 20, 0xf3);
                        rt2800_rfcsr_write(rt2x00dev, 25, 0x01);
                }
                rt2800_rfcsr_write(rt2x00dev, 26, 0x87);
                rt2800_rfcsr_write(rt2x00dev, 27, 0x01);
                rt2800_rfcsr_write(rt2x00dev, 29, 0x9f);
        }

        rt2800_register_read(rt2x00dev, GPIO_CTRL, &reg);
        rt2x00_set_field32(&reg, GPIO_CTRL_DIR7, 0);
        if (rf->channel <= 14)
                rt2x00_set_field32(&reg, GPIO_CTRL_VAL7, 1);
        else
                rt2x00_set_field32(&reg, GPIO_CTRL_VAL7, 0);
        rt2800_register_write(rt2x00dev, GPIO_CTRL, reg);

        rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1);
        rt2800_rfcsr_write(rt2x00dev, 7, rfcsr);
}

#define POWER_BOUND             0x27
#define FREQ_OFFSET_BOUND       0x5f

static void rt2800_config_channel_rf3290(struct rt2x00_dev *rt2x00dev,
                                         struct ieee80211_conf *conf,
                                         struct rf_channel *rf,
                                         struct channel_info *info)
{
        u8 rfcsr;

        rt2800_rfcsr_write(rt2x00dev, 8, rf->rf1);
        rt2800_rfcsr_write(rt2x00dev, 9, rf->rf3);
        rt2800_rfcsr_read(rt2x00dev, 11, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR11_R, rf->rf2);
        rt2800_rfcsr_write(rt2x00dev, 11, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 49, &rfcsr);
        if (info->default_power1 > POWER_BOUND)
                rt2x00_set_field8(&rfcsr, RFCSR49_TX, POWER_BOUND);
        else
                rt2x00_set_field8(&rfcsr, RFCSR49_TX, info->default_power1);
        rt2800_rfcsr_write(rt2x00dev, 49, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 17, &rfcsr);
        if (rt2x00dev->freq_offset > FREQ_OFFSET_BOUND)
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, FREQ_OFFSET_BOUND);
        else
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, rt2x00dev->freq_offset);
        rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);

        if (rf->channel <= 14) {
                if (rf->channel == 6)
                        rt2800_bbp_write(rt2x00dev, 68, 0x0c);
                else
                        rt2800_bbp_write(rt2x00dev, 68, 0x0b);

                if (rf->channel >= 1 && rf->channel <= 6)
                        rt2800_bbp_write(rt2x00dev, 59, 0x0f);
                else if (rf->channel >= 7 && rf->channel <= 11)
                        rt2800_bbp_write(rt2x00dev, 59, 0x0e);
                else if (rf->channel >= 12 && rf->channel <= 14)
                        rt2800_bbp_write(rt2x00dev, 59, 0x0d);
        }
}

static void rt2800_config_channel_rf3322(struct rt2x00_dev *rt2x00dev,
                                         struct ieee80211_conf *conf,
                                         struct rf_channel *rf,
                                         struct channel_info *info)
{
        u8 rfcsr;

        rt2800_rfcsr_write(rt2x00dev, 8, rf->rf1);
        rt2800_rfcsr_write(rt2x00dev, 9, rf->rf3);

        rt2800_rfcsr_write(rt2x00dev, 11, 0x42);
        rt2800_rfcsr_write(rt2x00dev, 12, 0x1c);
        rt2800_rfcsr_write(rt2x00dev, 13, 0x00);

        if (info->default_power1 > POWER_BOUND)
                rt2800_rfcsr_write(rt2x00dev, 47, POWER_BOUND);
        else
                rt2800_rfcsr_write(rt2x00dev, 47, info->default_power1);

        if (info->default_power2 > POWER_BOUND)
                rt2800_rfcsr_write(rt2x00dev, 48, POWER_BOUND);
        else
                rt2800_rfcsr_write(rt2x00dev, 48, info->default_power2);

        rt2800_rfcsr_read(rt2x00dev, 17, &rfcsr);
        if (rt2x00dev->freq_offset > FREQ_OFFSET_BOUND)
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, FREQ_OFFSET_BOUND);
        else
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, rt2x00dev->freq_offset);

        rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX0_PD, 1);

        if ( rt2x00dev->default_ant.tx_chain_num == 2 )
                rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD, 1);
        else
                rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD, 0);

        if ( rt2x00dev->default_ant.rx_chain_num == 2 )
                rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD, 1);
        else
                rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD, 0);

        rt2x00_set_field8(&rfcsr, RFCSR1_RX2_PD, 0);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX2_PD, 0);

        rt2800_rfcsr_write(rt2x00dev, 1, rfcsr);

        rt2800_rfcsr_write(rt2x00dev, 31, 80);
}

static void rt2800_config_channel_rf53xx(struct rt2x00_dev *rt2x00dev,
                                         struct ieee80211_conf *conf,
                                         struct rf_channel *rf,
                                         struct channel_info *info)
{
        u8 rfcsr;

        rt2800_rfcsr_write(rt2x00dev, 8, rf->rf1);
        rt2800_rfcsr_write(rt2x00dev, 9, rf->rf3);
        rt2800_rfcsr_read(rt2x00dev, 11, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR11_R, rf->rf2);
        rt2800_rfcsr_write(rt2x00dev, 11, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 49, &rfcsr);
        if (info->default_power1 > POWER_BOUND)
                rt2x00_set_field8(&rfcsr, RFCSR49_TX, POWER_BOUND);
        else
                rt2x00_set_field8(&rfcsr, RFCSR49_TX, info->default_power1);
        rt2800_rfcsr_write(rt2x00dev, 49, rfcsr);

        if (rt2x00_rt(rt2x00dev, RT5392)) {
                rt2800_rfcsr_read(rt2x00dev, 50, &rfcsr);
                if (info->default_power1 > POWER_BOUND)
                        rt2x00_set_field8(&rfcsr, RFCSR50_TX, POWER_BOUND);
                else
                        rt2x00_set_field8(&rfcsr, RFCSR50_TX,
                                          info->default_power2);
                rt2800_rfcsr_write(rt2x00dev, 50, rfcsr);
        }

        rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
        if (rt2x00_rt(rt2x00dev, RT5392)) {
                rt2x00_set_field8(&rfcsr, RFCSR1_RX1_PD, 1);
                rt2x00_set_field8(&rfcsr, RFCSR1_TX1_PD, 1);
        }
        rt2x00_set_field8(&rfcsr, RFCSR1_RF_BLOCK_EN, 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_PLL_PD, 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 1);
        rt2x00_set_field8(&rfcsr, RFCSR1_TX0_PD, 1);
        rt2800_rfcsr_write(rt2x00dev, 1, rfcsr);

        rt2800_rfcsr_read(rt2x00dev, 17, &rfcsr);
        if (rt2x00dev->freq_offset > FREQ_OFFSET_BOUND)
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, FREQ_OFFSET_BOUND);
        else
                rt2x00_set_field8(&rfcsr, RFCSR17_CODE, rt2x00dev->freq_offset);
        rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);

        if (rf->channel <= 14) {
                int idx = rf->channel-1;

                if (test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags)) {
                        if (rt2x00_rt_rev_gte(rt2x00dev, RT5390, REV_RT5390F)) {
                                /* r55/r59 value array of channel 1~14 */
                                static const char r55_bt_rev[] = {0x83, 0x83,
                                        0x83, 0x73, 0x73, 0x63, 0x53, 0x53,
                                        0x53, 0x43, 0x43, 0x43, 0x43, 0x43};
                                static const char r59_bt_rev[] = {0x0e, 0x0e,
                                        0x0e, 0x0e, 0x0e, 0x0b, 0x0a, 0x09,
                                        0x07, 0x07, 0x07, 0x07, 0x07, 0x07};

                                rt2800_rfcsr_write(rt2x00dev, 55,
                                                   r55_bt_rev[idx]);
                                rt2800_rfcsr_write(rt2x00dev, 59,
                                                   r59_bt_rev[idx]);
                        } else {
                                static const char r59_bt[] = {0x8b, 0x8b, 0x8b,
                                        0x8b, 0x8b, 0x8b, 0x8b, 0x8a, 0x89,
                                        0x88, 0x88, 0x86, 0x85, 0x84};

                                rt2800_rfcsr_write(rt2x00dev, 59, r59_bt[idx]);
                        }
                } else {
                        if (rt2x00_rt_rev_gte(rt2x00dev, RT5390, REV_RT5390F)) {
                                static const char r55_nonbt_rev[] = {0x23, 0x23,
                                        0x23, 0x23, 0x13, 0x13, 0x03, 0x03,
                                        0x03, 0x03, 0x03, 0x03, 0x03, 0x03};
                                static const char r59_nonbt_rev[] = {0x07, 0x07,
                                        0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
                                        0x07, 0x07, 0x06, 0x05, 0x04, 0x04};

                                rt2800_rfcsr_write(rt2x00dev, 55,
                                                   r55_nonbt_rev[idx]);
                                rt2800_rfcsr_write(rt2x00dev, 59,
                                                   r59_nonbt_rev[idx]);
                        } else if (rt2x00_rt(rt2x00dev, RT5390) ||
                                   rt2x00_rt(rt2x00dev, RT5392)) {
                                static const char r59_non_bt[] = {0x8f, 0x8f,
                                        0x8f, 0x8f, 0x8f, 0x8f, 0x8f, 0x8d,
                                        0x8a, 0x88, 0x88, 0x87, 0x87, 0x86};

                                rt2800_rfcsr_write(rt2x00dev, 59,
                                                   r59_non_bt[idx]);
                        }
                }
        }
}

static void rt2800_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, rfcsr;

        if (rf->channel <= 14) {
                info->default_power1 = TXPOWER_G_TO_DEV(info->default_power1);
                info->default_power2 = TXPOWER_G_TO_DEV(info->default_power2);
        } else {
                info->default_power1 = TXPOWER_A_TO_DEV(info->default_power1);
                info->default_power2 = TXPOWER_A_TO_DEV(info->default_power2);
        }

        switch (rt2x00dev->chip.rf) {
        case RF2020:
        case RF3020:
        case RF3021:
        case RF3022:
        case RF3320:
                rt2800_config_channel_rf3xxx(rt2x00dev, conf, rf, info);
                break;
        case RF3052:
                rt2800_config_channel_rf3052(rt2x00dev, conf, rf, info);
                break;
        case RF3290:
                rt2800_config_channel_rf3290(rt2x00dev, conf, rf, info);
                break;
        case RF3322:
                rt2800_config_channel_rf3322(rt2x00dev, conf, rf, info);
                break;
        case RF5360:
        case RF5370:
        case RF5372:
        case RF5390:
        case RF5392:
                rt2800_config_channel_rf53xx(rt2x00dev, conf, rf, info);
                break;
        default:
                rt2800_config_channel_rf2xxx(rt2x00dev, conf, rf, info);
        }

        if (rt2x00_rf(rt2x00dev, RF3290) ||
            rt2x00_rf(rt2x00dev, RF3322) ||
            rt2x00_rf(rt2x00dev, RF5360) ||
            rt2x00_rf(rt2x00dev, RF5370) ||
            rt2x00_rf(rt2x00dev, RF5372) ||
            rt2x00_rf(rt2x00dev, RF5390) ||
            rt2x00_rf(rt2x00dev, RF5392)) {
                rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR30_TX_H20M, 0);
                rt2x00_set_field8(&rfcsr, RFCSR30_RX_H20M, 0);
                rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);

                rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR3_VCOCAL_EN, 1);
                rt2800_rfcsr_write(rt2x00dev, 3, rfcsr);
        }

        /*
         * Change BBP settings
         */
        if (rt2x00_rt(rt2x00dev, RT3352)) {
                rt2800_bbp_write(rt2x00dev, 27, 0x0);
                rt2800_bbp_write(rt2x00dev, 66, 0x26 + rt2x00dev->lna_gain);
                rt2800_bbp_write(rt2x00dev, 27, 0x20);
                rt2800_bbp_write(rt2x00dev, 66, 0x26 + rt2x00dev->lna_gain);
        } else {
                rt2800_bbp_write(rt2x00dev, 62, 0x37 - rt2x00dev->lna_gain);
                rt2800_bbp_write(rt2x00dev, 63, 0x37 - rt2x00dev->lna_gain);
                rt2800_bbp_write(rt2x00dev, 64, 0x37 - rt2x00dev->lna_gain);
                rt2800_bbp_write(rt2x00dev, 86, 0);
        }

        if (rf->channel <= 14) {
                if (!rt2x00_rt(rt2x00dev, RT5390) &&
                    !rt2x00_rt(rt2x00dev, RT5392)) {
                        if (test_bit(CAPABILITY_EXTERNAL_LNA_BG,
                                     &rt2x00dev->cap_flags)) {
                                rt2800_bbp_write(rt2x00dev, 82, 0x62);
                                rt2800_bbp_write(rt2x00dev, 75, 0x46);
                        } else {
                                rt2800_bbp_write(rt2x00dev, 82, 0x84);
                                rt2800_bbp_write(rt2x00dev, 75, 0x50);
                        }
                }
        } else {
                if (rt2x00_rt(rt2x00dev, RT3572))
                        rt2800_bbp_write(rt2x00dev, 82, 0x94);
                else
                        rt2800_bbp_write(rt2x00dev, 82, 0xf2);

                if (test_bit(CAPABILITY_EXTERNAL_LNA_A, &rt2x00dev->cap_flags))
                        rt2800_bbp_write(rt2x00dev, 75, 0x46);
                else
                        rt2800_bbp_write(rt2x00dev, 75, 0x50);
        }

        rt2800_register_read(rt2x00dev, TX_BAND_CFG, &reg);
        rt2x00_set_field32(&reg, TX_BAND_CFG_HT40_MINUS, conf_is_ht40_minus(conf));
        rt2x00_set_field32(&reg, TX_BAND_CFG_A, rf->channel > 14);
        rt2x00_set_field32(&reg, TX_BAND_CFG_BG, rf->channel <= 14);
        rt2800_register_write(rt2x00dev, TX_BAND_CFG, reg);

        if (rt2x00_rt(rt2x00dev, RT3572))
                rt2800_rfcsr_write(rt2x00dev, 8, 0);

        tx_pin = 0;

        /* Turn on unused PA or LNA when not using 1T or 1R */
        if (rt2x00dev->default_ant.tx_chain_num == 2) {
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A1_EN,
                                   rf->channel > 14);
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G1_EN,
                                   rf->channel <= 14);
        }

        /* Turn on unused PA or LNA when not using 1T or 1R */
        if (rt2x00dev->default_ant.rx_chain_num == 2) {
                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);
        if (test_bit(CAPABILITY_BT_COEXIST, &rt2x00dev->cap_flags))
                rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G0_EN, 1);
        else
                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);

        rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);

        if (rt2x00_rt(rt2x00dev, RT3572))
                rt2800_rfcsr_write(rt2x00dev, 8, 0x80);

        rt2800_bbp_read(rt2x00dev, 4, &bbp);
        rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 2 * conf_is_ht40(conf));
        rt2800_bbp_write(rt2x00dev, 4, bbp);

        rt2800_bbp_read(rt2x00dev, 3, &bbp);
        rt2x00_set_field8(&bbp, BBP3_HT40_MINUS, conf_is_ht40_minus(conf));
        rt2800_bbp_write(rt2x00dev, 3, bbp);

        if (rt2x00_rt_rev(rt2x00dev, RT2860, REV_RT2860C)) {
                if (conf_is_ht40(conf)) {
                        rt2800_bbp_write(rt2x00dev, 69, 0x1a);
                        rt2800_bbp_write(rt2x00dev, 70, 0x0a);
                        rt2800_bbp_write(rt2x00dev, 73, 0x16);
                } else {
                        rt2800_bbp_write(rt2x00dev, 69, 0x16);
                        rt2800_bbp_write(rt2x00dev, 70, 0x08);
                        rt2800_bbp_write(rt2x00dev, 73, 0x11);
                }
        }

        msleep(1);

        /*
         * Clear channel statistic counters
         */
        rt2800_register_read(rt2x00dev, CH_IDLE_STA, &reg);
        rt2800_register_read(rt2x00dev, CH_BUSY_STA, &reg);
        rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, &reg);

        /*
         * Clear update flag
         */
        if (rt2x00_rt(rt2x00dev, RT3352)) {
                rt2800_bbp_read(rt2x00dev, 49, &bbp);
                rt2x00_set_field8(&bbp, BBP49_UPDATE_FLAG, 0);
                rt2800_bbp_write(rt2x00dev, 49, bbp);
        }
}

static int rt2800_get_gain_calibration_delta(struct rt2x00_dev *rt2x00dev)
{
        u8 tssi_bounds[9];
        u8 current_tssi;
        u16 eeprom;
        u8 step;
        int i;

        /*
         * Read TSSI boundaries for temperature compensation from
         * the EEPROM.
         *
         * Array idx               0    1    2    3    4    5    6    7    8
         * Matching Delta value   -4   -3   -2   -1    0   +1   +2   +3   +4
         * Example TSSI bounds  0xF0 0xD0 0xB5 0xA0 0x88 0x45 0x25 0x15 0x00
         */
        if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG1, &eeprom);
                tssi_bounds[0] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG1_MINUS4);
                tssi_bounds[1] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG1_MINUS3);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG2, &eeprom);
                tssi_bounds[2] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG2_MINUS2);
                tssi_bounds[3] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG2_MINUS1);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG3, &eeprom);
                tssi_bounds[4] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG3_REF);
                tssi_bounds[5] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG3_PLUS1);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG4, &eeprom);
                tssi_bounds[6] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG4_PLUS2);
                tssi_bounds[7] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG4_PLUS3);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG5, &eeprom);
                tssi_bounds[8] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_BG5_PLUS4);

                step = rt2x00_get_field16(eeprom,
                                          EEPROM_TSSI_BOUND_BG5_AGC_STEP);
        } else {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A1, &eeprom);
                tssi_bounds[0] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A1_MINUS4);
                tssi_bounds[1] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A1_MINUS3);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A2, &eeprom);
                tssi_bounds[2] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A2_MINUS2);
                tssi_bounds[3] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A2_MINUS1);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A3, &eeprom);
                tssi_bounds[4] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A3_REF);
                tssi_bounds[5] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A3_PLUS1);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A4, &eeprom);
                tssi_bounds[6] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A4_PLUS2);
                tssi_bounds[7] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A4_PLUS3);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A5, &eeprom);
                tssi_bounds[8] = rt2x00_get_field16(eeprom,
                                        EEPROM_TSSI_BOUND_A5_PLUS4);

                step = rt2x00_get_field16(eeprom,
                                          EEPROM_TSSI_BOUND_A5_AGC_STEP);
        }

        /*
         * Check if temperature compensation is supported.
         */
        if (tssi_bounds[4] == 0xff || step == 0xff)
                return 0;

        /*
         * Read current TSSI (BBP 49).
         */
        rt2800_bbp_read(rt2x00dev, 49, &current_tssi);

        /*
         * Compare TSSI value (BBP49) with the compensation boundaries
         * from the EEPROM and increase or decrease tx power.
         */
        for (i = 0; i <= 3; i++) {
                if (current_tssi > tssi_bounds[i])
                        break;
        }

        if (i == 4) {
                for (i = 8; i >= 5; i--) {
                        if (current_tssi < tssi_bounds[i])
                                break;
                }
        }

        return (i - 4) * step;
}

static int rt2800_get_txpower_bw_comp(struct rt2x00_dev *rt2x00dev,
                                      enum ieee80211_band band)
{
        u16 eeprom;
        u8 comp_en;
        u8 comp_type;
        int comp_value = 0;

        rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_DELTA, &eeprom);

        /*
         * HT40 compensation not required.
         */
        if (eeprom == 0xffff ||
            !test_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags))
                return 0;

        if (band == IEEE80211_BAND_2GHZ) {
                comp_en = rt2x00_get_field16(eeprom,
                                 EEPROM_TXPOWER_DELTA_ENABLE_2G);
                if (comp_en) {
                        comp_type = rt2x00_get_field16(eeprom,
                                           EEPROM_TXPOWER_DELTA_TYPE_2G);
                        comp_value = rt2x00_get_field16(eeprom,
                                            EEPROM_TXPOWER_DELTA_VALUE_2G);
                        if (!comp_type)
                                comp_value = -comp_value;
                }
        } else {
                comp_en = rt2x00_get_field16(eeprom,
                                 EEPROM_TXPOWER_DELTA_ENABLE_5G);
                if (comp_en) {
                        comp_type = rt2x00_get_field16(eeprom,
                                           EEPROM_TXPOWER_DELTA_TYPE_5G);
                        comp_value = rt2x00_get_field16(eeprom,
                                            EEPROM_TXPOWER_DELTA_VALUE_5G);
                        if (!comp_type)
                                comp_value = -comp_value;
                }
        }

        return comp_value;
}

static int rt2800_get_txpower_reg_delta(struct rt2x00_dev *rt2x00dev,
                                        int power_level, int max_power)
{
        int delta;

        if (test_bit(CAPABILITY_POWER_LIMIT, &rt2x00dev->cap_flags))
                return 0;

        /*
         * XXX: We don't know the maximum transmit power of our hardware since
         * the EEPROM doesn't expose it. We only know that we are calibrated
         * to 100% tx power.
         *
         * Hence, we assume the regulatory limit that cfg80211 calulated for
         * the current channel is our maximum and if we are requested to lower
         * the value we just reduce our tx power accordingly.
         */
        delta = power_level - max_power;
        return min(delta, 0);
}

static u8 rt2800_compensate_txpower(struct rt2x00_dev *rt2x00dev, int is_rate_b,
                                   enum ieee80211_band band, int power_level,
                                   u8 txpower, int delta)
{
        u16 eeprom;
        u8 criterion;
        u8 eirp_txpower;
        u8 eirp_txpower_criterion;
        u8 reg_limit;

        if (test_bit(CAPABILITY_POWER_LIMIT, &rt2x00dev->cap_flags)) {
                /*
                 * Check if eirp txpower exceed txpower_limit.
                 * We use OFDM 6M as criterion and its eirp txpower
                 * is stored at EEPROM_EIRP_MAX_TX_POWER.
                 * .11b data rate need add additional 4dbm
                 * when calculating eirp txpower.
                 */
                rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_BYRATE + 1,
                                   &eeprom);
                criterion = rt2x00_get_field16(eeprom,
                                               EEPROM_TXPOWER_BYRATE_RATE0);

                rt2x00_eeprom_read(rt2x00dev, EEPROM_EIRP_MAX_TX_POWER,
                                   &eeprom);

                if (band == IEEE80211_BAND_2GHZ)
                        eirp_txpower_criterion = rt2x00_get_field16(eeprom,
                                                 EEPROM_EIRP_MAX_TX_POWER_2GHZ);
                else
                        eirp_txpower_criterion = rt2x00_get_field16(eeprom,
                                                 EEPROM_EIRP_MAX_TX_POWER_5GHZ);

                eirp_txpower = eirp_txpower_criterion + (txpower - criterion) +
                               (is_rate_b ? 4 : 0) + delta;

                reg_limit = (eirp_txpower > power_level) ?
                                        (eirp_txpower - power_level) : 0;
        } else
                reg_limit = 0;

        txpower = max(0, txpower + delta - reg_limit);
        return min_t(u8, txpower, 0xc);
}

/*
 * We configure transmit power using MAC TX_PWR_CFG_{0,...,N} registers and
 * BBP R1 register. TX_PWR_CFG_X allow to configure per rate TX power values,
 * 4 bits for each rate (tune from 0 to 15 dBm). BBP_R1 controls transmit power
 * for all rates, but allow to set only 4 discrete values: -12, -6, 0 and 6 dBm.
 * Reference per rate transmit power values are located in the EEPROM at
 * EEPROM_TXPOWER_BYRATE offset. We adjust them and BBP R1 settings according to
 * current conditions (i.e. band, bandwidth, temperature, user settings).
 */
static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
                                  struct ieee80211_channel *chan,
                                  int power_level)
{
        u8 txpower, r1;
        u16 eeprom;
        u32 reg, offset;
        int i, is_rate_b, delta, power_ctrl;
        enum ieee80211_band band = chan->band;

        /*
         * Calculate HT40 compensation. For 40MHz we need to add or subtract
         * value read from EEPROM (different for 2GHz and for 5GHz).
         */
        delta = rt2800_get_txpower_bw_comp(rt2x00dev, band);

        /*
         * Calculate temperature compensation. Depends on measurement of current
         * TSSI (Transmitter Signal Strength Indication) we know TX power (due
         * to temperature or maybe other factors) is smaller or bigger than
         * expected. We adjust it, based on TSSI reference and boundaries values
         * provided in EEPROM.
         */
        delta += rt2800_get_gain_calibration_delta(rt2x00dev);

        /*
         * Decrease power according to user settings, on devices with unknown
         * maximum tx power. For other devices we take user power_level into
         * consideration on rt2800_compensate_txpower().
         */
        delta += rt2800_get_txpower_reg_delta(rt2x00dev, power_level,
                                              chan->max_power);

        /*
         * BBP_R1 controls TX power for all rates, it allow to set the following
         * gains -12, -6, 0, +6 dBm by setting values 2, 1, 0, 3 respectively.
         *
         * TODO: we do not use +6 dBm option to do not increase power beyond
         * regulatory limit, however this could be utilized for devices with
         * CAPABILITY_POWER_LIMIT.
         */
        rt2800_bbp_read(rt2x00dev, 1, &r1);
        if (delta <= -12) {
                power_ctrl = 2;
                delta += 12;
        } else if (delta <= -6) {
                power_ctrl = 1;
                delta += 6;
        } else {
                power_ctrl = 0;
        }
        rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, power_ctrl);
        rt2800_bbp_write(rt2x00dev, 1, r1);
        offset = TX_PWR_CFG_0;

        for (i = 0; i < EEPROM_TXPOWER_BYRATE_SIZE; i += 2) {
                /* just to be safe */
                if (offset > TX_PWR_CFG_4)
                        break;

                rt2800_register_read(rt2x00dev, offset, &reg);

                /* read the next four txpower values */
                rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_BYRATE + i,
                                   &eeprom);

                is_rate_b = i ? 0 : 1;
                /*
                 * TX_PWR_CFG_0: 1MBS, TX_PWR_CFG_1: 24MBS,
                 * TX_PWR_CFG_2: MCS4, TX_PWR_CFG_3: MCS12,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE0);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE0, txpower);

                /*
                 * TX_PWR_CFG_0: 2MBS, TX_PWR_CFG_1: 36MBS,
                 * TX_PWR_CFG_2: MCS5, TX_PWR_CFG_3: MCS13,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE1);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE1, txpower);

                /*
                 * TX_PWR_CFG_0: 5.5MBS, TX_PWR_CFG_1: 48MBS,
                 * TX_PWR_CFG_2: MCS6,  TX_PWR_CFG_3: MCS14,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE2);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE2, txpower);

                /*
                 * TX_PWR_CFG_0: 11MBS, TX_PWR_CFG_1: 54MBS,
                 * TX_PWR_CFG_2: MCS7,  TX_PWR_CFG_3: MCS15,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE3);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE3, txpower);

                /* read the next four txpower values */
                rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_BYRATE + i + 1,
                                   &eeprom);

                is_rate_b = 0;
                /*
                 * TX_PWR_CFG_0: 6MBS, TX_PWR_CFG_1: MCS0,
                 * TX_PWR_CFG_2: MCS8, TX_PWR_CFG_3: unknown,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE0);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE4, txpower);

                /*
                 * TX_PWR_CFG_0: 9MBS, TX_PWR_CFG_1: MCS1,
                 * TX_PWR_CFG_2: MCS9, TX_PWR_CFG_3: unknown,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE1);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE5, txpower);

                /*
                 * TX_PWR_CFG_0: 12MBS, TX_PWR_CFG_1: MCS2,
                 * TX_PWR_CFG_2: MCS10, TX_PWR_CFG_3: unknown,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE2);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE6, txpower);

                /*
                 * TX_PWR_CFG_0: 18MBS, TX_PWR_CFG_1: MCS3,
                 * TX_PWR_CFG_2: MCS11, TX_PWR_CFG_3: unknown,
                 * TX_PWR_CFG_4: unknown
                 */
                txpower = rt2x00_get_field16(eeprom,
                                             EEPROM_TXPOWER_BYRATE_RATE3);
                txpower = rt2800_compensate_txpower(rt2x00dev, is_rate_b, band,
                                             power_level, txpower, delta);
                rt2x00_set_field32(&reg, TX_PWR_CFG_RATE7, txpower);

                rt2800_register_write(rt2x00dev, offset, reg);

                /* next TX_PWR_CFG register */
                offset += 4;
        }
}

void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev)
{
        rt2800_config_txpower(rt2x00dev, rt2x00dev->hw->conf.channel,
                              rt2x00dev->tx_power);
}
EXPORT_SYMBOL_GPL(rt2800_gain_calibration);

void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev)
{
        u32     tx_pin;
        u8      rfcsr;

        /*
         * A voltage-controlled oscillator(VCO) is an electronic oscillator
         * designed to be controlled in oscillation frequency by a voltage
         * input. Maybe the temperature will affect the frequency of
         * oscillation to be shifted. The VCO calibration will be called
         * periodically to adjust the frequency to be precision.
        */

        rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
        tx_pin &= TX_PIN_CFG_PA_PE_DISABLE;
        rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);

        switch (rt2x00dev->chip.rf) {
        case RF2020:
        case RF3020:
        case RF3021:
        case RF3022:
        case RF3320:
        case RF3052:
                rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1);
                rt2800_rfcsr_write(rt2x00dev, 7, rfcsr);
                break;
        case RF3290:
        case RF5360:
        case RF5370:
        case RF5372:
        case RF5390:
        case RF5392:
                rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR3_VCOCAL_EN, 1);
                rt2800_rfcsr_write(rt2x00dev, 3, rfcsr);
                break;
        default:
                return;
        }

        mdelay(1);

        rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
        if (rt2x00dev->rf_channel <= 14) {
                switch (rt2x00dev->default_ant.tx_chain_num) {
                case 3:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G2_EN, 1);
                        /* fall through */
                case 2:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G1_EN, 1);
                        /* fall through */
                case 1:
                default:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G0_EN, 1);
                        break;
                }
        } else {
                switch (rt2x00dev->default_ant.tx_chain_num) {
                case 3:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A2_EN, 1);
                        /* fall through */
                case 2:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A1_EN, 1);
                        /* fall through */
                case 1:
                default:
                        rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A0_EN, 1);
                        break;
                }
        }
        rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);

}
EXPORT_SYMBOL_GPL(rt2800_vco_calibration);

static void rt2800_config_retry_limit(struct rt2x00_dev *rt2x00dev,
                                      struct rt2x00lib_conf *libconf)
{
        u32 reg;

        rt2800_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);
        rt2800_register_write(rt2x00dev, TX_RTY_CFG, reg);
}

static void rt2800_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) {
                rt2800_register_write(rt2x00dev, AUTOWAKEUP_CFG, 0);

                rt2800_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);
                rt2800_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);

                rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
        } else {
                rt2800_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);
                rt2800_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);

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

void rt2800_config(struct rt2x00_dev *rt2x00dev,
                   struct rt2x00lib_conf *libconf,
                   const unsigned int flags)
{
        /* Always recalculate LNA gain before changing configuration */
        rt2800_config_lna_gain(rt2x00dev, libconf);

        if (flags & IEEE80211_CONF_CHANGE_CHANNEL) {
                rt2800_config_channel(rt2x00dev, libconf->conf,
                                      &libconf->rf, &libconf->channel);
                rt2800_config_txpower(rt2x00dev, libconf->conf->channel,
                                      libconf->conf->power_level);
        }
        if (flags & IEEE80211_CONF_CHANGE_POWER)
                rt2800_config_txpower(rt2x00dev, libconf->conf->channel,
                                      libconf->conf->power_level);
        if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
                rt2800_config_retry_limit(rt2x00dev, libconf);
        if (flags & IEEE80211_CONF_CHANGE_PS)
                rt2800_config_ps(rt2x00dev, libconf);
}
EXPORT_SYMBOL_GPL(rt2800_config);

/*
 * Link tuning
 */
void rt2800_link_stats(struct rt2x00_dev *rt2x00dev, struct link_qual *qual)
{
        u32 reg;

        /*
         * Update FCS error count from register.
         */
        rt2800_register_read(rt2x00dev, RX_STA_CNT0, &reg);
        qual->rx_failed = rt2x00_get_field32(reg, RX_STA_CNT0_CRC_ERR);
}
EXPORT_SYMBOL_GPL(rt2800_link_stats);

static u8 rt2800_get_default_vgc(struct rt2x00_dev *rt2x00dev)
{
        u8 vgc;

        if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
                if (rt2x00_rt(rt2x00dev, RT3070) ||
                    rt2x00_rt(rt2x00dev, RT3071) ||
                    rt2x00_rt(rt2x00dev, RT3090) ||
                    rt2x00_rt(rt2x00dev, RT3290) ||
                    rt2x00_rt(rt2x00dev, RT3390) ||
                    rt2x00_rt(rt2x00dev, RT3572) ||
                    rt2x00_rt(rt2x00dev, RT5390) ||
                    rt2x00_rt(rt2x00dev, RT5392))
                        vgc = 0x1c + (2 * rt2x00dev->lna_gain);
                else
                        vgc = 0x2e + rt2x00dev->lna_gain;
        } else { /* 5GHZ band */
                if (rt2x00_rt(rt2x00dev, RT3572))
                        vgc = 0x22 + (rt2x00dev->lna_gain * 5) / 3;
                else {
                        if (!test_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags))
                                vgc = 0x32 + (rt2x00dev->lna_gain * 5) / 3;
                        else
                                vgc = 0x3a + (rt2x00dev->lna_gain * 5) / 3;
                }
        }

        return vgc;
}

static inline void rt2800_set_vgc(struct rt2x00_dev *rt2x00dev,
                                  struct link_qual *qual, u8 vgc_level)
{
        if (qual->vgc_level != vgc_level) {
                rt2800_bbp_write(rt2x00dev, 66, vgc_level);
                qual->vgc_level = vgc_level;
                qual->vgc_level_reg = vgc_level;
        }
}

void rt2800_reset_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual)
{
        rt2800_set_vgc(rt2x00dev, qual, rt2800_get_default_vgc(rt2x00dev));
}
EXPORT_SYMBOL_GPL(rt2800_reset_tuner);

void rt2800_link_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual,
                       const u32 count)
{
        if (rt2x00_rt_rev(rt2x00dev, RT2860, REV_RT2860C))
                return;

        /*
         * When RSSI is better then -80 increase VGC level with 0x10
         */
        rt2800_set_vgc(rt2x00dev, qual,
                       rt2800_get_default_vgc(rt2x00dev) +
                       ((qual->rssi > -80) * 0x10));
}
EXPORT_SYMBOL_GPL(rt2800_link_tuner);

/*
 * Initialization functions.
 */
static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
{
        u32 reg;
        u16 eeprom;
        unsigned int i;
        int ret;