drivers/net/wireless/rt2x00/rt2500pci.c

/*
	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2500pci
	Abstract: rt2500pci device specific routines.
	Supported chipsets: RT2560.
 */

#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/eeprom_93cx6.h>

#include "rt2x00.h"
#include "rt2x00pci.h"
#include "rt2500pci.h"

/*
 * Register access.
 * All access to the CSR registers will go through the methods
 * rt2x00pci_register_read and rt2x00pci_register_write.
 * BBP and RF register require indirect register access,
 * and use the CSR registers BBPCSR and RFCSR to achieve this.
 * These indirect registers work with busy bits,
 * and we will try maximal REGISTER_BUSY_COUNT times to access
 * the register while taking a REGISTER_BUSY_DELAY us delay
 * between each attampt. When the busy bit is still set at that time,
 * the access attempt is considered to have failed,
 * and we will print an error.
 */
static u32 rt2500pci_bbp_check(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;
	unsigned int i;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2x00pci_register_read(rt2x00dev, BBPCSR, &reg);
		if (!rt2x00_get_field32(reg, BBPCSR_BUSY))
			break;
		udelay(REGISTER_BUSY_DELAY);
	}

	return reg;
}

static void rt2500pci_bbp_write(struct rt2x00_dev *rt2x00dev,
				const unsigned int word, const u8 value)
{
	u32 reg;

	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500pci_bbp_check(rt2x00dev);
	if (rt2x00_get_field32(reg, BBPCSR_BUSY)) {
		ERROR(rt2x00dev, "BBPCSR register busy. Write failed.\n");
		return;
	}

	/*
	 * Write the data into the BBP.
	 */
	reg = 0;
	rt2x00_set_field32(&reg, BBPCSR_VALUE, value);
	rt2x00_set_field32(&reg, BBPCSR_REGNUM, word);
	rt2x00_set_field32(&reg, BBPCSR_BUSY, 1);
	rt2x00_set_field32(&reg, BBPCSR_WRITE_CONTROL, 1);

	rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);
}

static void rt2500pci_bbp_read(struct rt2x00_dev *rt2x00dev,
			       const unsigned int word, u8 *value)
{
	u32 reg;

	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500pci_bbp_check(rt2x00dev);
	if (rt2x00_get_field32(reg, BBPCSR_BUSY)) {
		ERROR(rt2x00dev, "BBPCSR register busy. Read failed.\n");
		return;
	}

	/*
	 * Write the request into the BBP.
	 */
	reg = 0;
	rt2x00_set_field32(&reg, BBPCSR_REGNUM, word);
	rt2x00_set_field32(&reg, BBPCSR_BUSY, 1);
	rt2x00_set_field32(&reg, BBPCSR_WRITE_CONTROL, 0);

	rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);

	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500pci_bbp_check(rt2x00dev);
	if (rt2x00_get_field32(reg, BBPCSR_BUSY)) {
		ERROR(rt2x00dev, "BBPCSR register busy. Read failed.\n");
		*value = 0xff;
		return;
	}

	*value = rt2x00_get_field32(reg, BBPCSR_VALUE);
}

static void rt2500pci_rf_write(struct rt2x00_dev *rt2x00dev,
			       const unsigned int word, const u32 value)
{
	u32 reg;
	unsigned int i;

	if (!word)
		return;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2x00pci_register_read(rt2x00dev, RFCSR, &reg);
		if (!rt2x00_get_field32(reg, RFCSR_BUSY))
			goto rf_write;
		udelay(REGISTER_BUSY_DELAY);
	}

	ERROR(rt2x00dev, "RFCSR register busy. Write failed.\n");
	return;

rf_write:
	reg = 0;
	rt2x00_set_field32(&reg, RFCSR_VALUE, value);
	rt2x00_set_field32(&reg, RFCSR_NUMBER_OF_BITS, 20);
	rt2x00_set_field32(&reg, RFCSR_IF_SELECT, 0);
	rt2x00_set_field32(&reg, RFCSR_BUSY, 1);

	rt2x00pci_register_write(rt2x00dev, RFCSR, reg);
	rt2x00_rf_write(rt2x00dev, word, value);
}

static void rt2500pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
{
	struct rt2x00_dev *rt2x00dev = eeprom->data;
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, CSR21, &reg);

	eeprom->reg_data_in = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_IN);
	eeprom->reg_data_out = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_OUT);
	eeprom->reg_data_clock =
	    !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_CLOCK);
	eeprom->reg_chip_select =
	    !!rt2x00_get_field32(reg, CSR21_EEPROM_CHIP_SELECT);
}

static void rt2500pci_eepromregister_write(struct eeprom_93cx6 *eeprom)
{
	struct rt2x00_dev *rt2x00dev = eeprom->data;
	u32 reg = 0;

	rt2x00_set_field32(&reg, CSR21_EEPROM_DATA_IN, !!eeprom->reg_data_in);
	rt2x00_set_field32(&reg, CSR21_EEPROM_DATA_OUT, !!eeprom->reg_data_out);
	rt2x00_set_field32(&reg, CSR21_EEPROM_DATA_CLOCK,
			   !!eeprom->reg_data_clock);
	rt2x00_set_field32(&reg, CSR21_EEPROM_CHIP_SELECT,
			   !!eeprom->reg_chip_select);

	rt2x00pci_register_write(rt2x00dev, CSR21, reg);
}

#ifdef CONFIG_RT2X00_LIB_DEBUGFS
#define CSR_OFFSET(__word)	( CSR_REG_BASE + ((__word) * sizeof(u32)) )

static void rt2500pci_read_csr(struct rt2x00_dev *rt2x00dev,
			       const unsigned int word, u32 *data)
{
	rt2x00pci_register_read(rt2x00dev, CSR_OFFSET(word), data);
}

static void rt2500pci_write_csr(struct rt2x00_dev *rt2x00dev,
				const unsigned int word, u32 data)
{
	rt2x00pci_register_write(rt2x00dev, CSR_OFFSET(word), data);
}

static const struct rt2x00debug rt2500pci_rt2x00debug = {
	.owner	= THIS_MODULE,
	.csr	= {
		.read		= rt2500pci_read_csr,
		.write		= rt2500pci_write_csr,
		.word_size	= sizeof(u32),
		.word_count	= CSR_REG_SIZE / sizeof(u32),
	},
	.eeprom	= {
		.read		= rt2x00_eeprom_read,
		.write		= rt2x00_eeprom_write,
		.word_size	= sizeof(u16),
		.word_count	= EEPROM_SIZE / sizeof(u16),
	},
	.bbp	= {
		.read		= rt2500pci_bbp_read,
		.write		= rt2500pci_bbp_write,
		.word_size	= sizeof(u8),
		.word_count	= BBP_SIZE / sizeof(u8),
	},
	.rf	= {
		.read		= rt2x00_rf_read,
		.write		= rt2500pci_rf_write,
		.word_size	= sizeof(u32),
		.word_count	= RF_SIZE / sizeof(u32),
	},
};
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */

#ifdef CONFIG_RT2500PCI_RFKILL
static int rt2500pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, GPIOCSR, &reg);
	return rt2x00_get_field32(reg, GPIOCSR_BIT0);
}
#else
#define rt2500pci_rfkill_poll	NULL
#endif /* CONFIG_RT2500PCI_RFKILL */

#ifdef CONFIG_RT2500PCI_LEDS
static void rt2500pci_led_brightness(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 activity =
	    led->rt2x00dev->led_flags & LED_SUPPORT_ACTIVITY;
	u32 reg;

	rt2x00pci_register_read(led->rt2x00dev, LEDCSR, &reg);

	if (led->type == LED_TYPE_RADIO || led->type == LED_TYPE_ASSOC) {
		rt2x00_set_field32(&reg, LEDCSR_LINK, enabled);
		rt2x00_set_field32(&reg, LEDCSR_ACTIVITY, enabled && activity);
	}

	rt2x00pci_register_write(led->rt2x00dev, LEDCSR, reg);
}
#else
#define rt2500pci_led_brightness	NULL
#endif /* CONFIG_RT2500PCI_LEDS */

/*
 * Configuration handlers.
 */
static void rt2500pci_config_intf(struct rt2x00_dev *rt2x00dev,
				  struct rt2x00_intf *intf,
				  struct rt2x00intf_conf *conf,
				  const unsigned int flags)
{
	struct data_queue *queue =
	    rt2x00queue_get_queue(rt2x00dev, RT2X00_BCN_QUEUE_BEACON);
	unsigned int bcn_preload;
	u32 reg;

	if (flags & CONFIG_UPDATE_TYPE) {
		/*
		 * Enable beacon config
		 */
		bcn_preload = PREAMBLE + get_duration(IEEE80211_HEADER, 20);
		rt2x00pci_register_read(rt2x00dev, BCNCSR1, &reg);
		rt2x00_set_field32(&reg, BCNCSR1_PRELOAD, bcn_preload);
		rt2x00_set_field32(&reg, BCNCSR1_BEACON_CWMIN, queue->cw_min);
		rt2x00pci_register_write(rt2x00dev, BCNCSR1, reg);

		/*
		 * Enable synchronisation.
		 */
		rt2x00pci_register_read(rt2x00dev, CSR14, &reg);
		rt2x00_set_field32(&reg, CSR14_TSF_SYNC, conf->sync);
		rt2x00pci_register_write(rt2x00dev, CSR14, reg);
	}

	if (flags & CONFIG_UPDATE_MAC)
		rt2x00pci_register_multiwrite(rt2x00dev, CSR3,
					      conf->mac, sizeof(conf->mac));

	if (flags & CONFIG_UPDATE_BSSID)
		rt2x00pci_register_multiwrite(rt2x00dev, CSR5,
					      conf->bssid, sizeof(conf->bssid));
}

static int rt2500pci_config_preamble(struct rt2x00_dev *rt2x00dev,
				     const int short_preamble,
				     const int ack_timeout,
				     const int ack_consume_time)
{
	int preamble_mask;
	u32 reg;

	/*
	 * When short preamble is enabled, we should set bit 0x08
	 */
	preamble_mask = short_preamble << 3;

	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
	rt2x00_set_field32(&reg, TXCSR1_ACK_TIMEOUT, ack_timeout);
	rt2x00_set_field32(&reg, TXCSR1_ACK_CONSUME_TIME, ack_consume_time);
	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);

	rt2x00pci_register_read(rt2x00dev, ARCSR2, &reg);
	rt2x00_set_field32(&reg, ARCSR2_SIGNAL, 0x00 | preamble_mask);
	rt2x00_set_field32(&reg, ARCSR2_SERVICE, 0x04);
	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
	rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);

	rt2x00pci_register_read(rt2x00dev, ARCSR3, &reg);
	rt2x00_set_field32(&reg, ARCSR3_SIGNAL, 0x01 | preamble_mask);
	rt2x00_set_field32(&reg, ARCSR3_SERVICE, 0x04);
	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 20));
	rt2x00pci_register_write(rt2x00dev, ARCSR3, reg);

	rt2x00pci_register_read(rt2x00dev, ARCSR4, &reg);
	rt2x00_set_field32(&reg, ARCSR4_SIGNAL, 0x02 | preamble_mask);
	rt2x00_set_field32(&reg, ARCSR4_SERVICE, 0x04);
	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 55));
	rt2x00pci_register_write(rt2x00dev, ARCSR4, reg);

	rt2x00pci_register_read(rt2x00dev, ARCSR5, &reg);
	rt2x00_set_field32(&reg, ARCSR5_SIGNAL, 0x03 | preamble_mask);
	rt2x00_set_field32(&reg, ARCSR5_SERVICE, 0x84);
	rt2x00_set_field32(&reg, ARCSR2_LENGTH, get_duration(ACK_SIZE, 110));
	rt2x00pci_register_write(rt2x00dev, ARCSR5, reg);

	return 0;
}

static void rt2500pci_config_phymode(struct rt2x00_dev *rt2x00dev,
				     const int basic_rate_mask)
{
	rt2x00pci_register_write(rt2x00dev, ARCSR1, basic_rate_mask);
}

static void rt2500pci_config_channel(struct rt2x00_dev *rt2x00dev,
				     struct rf_channel *rf, const int txpower)
{
	u8 r70;

	/*
	 * Set TXpower.
	 */
	rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));

	/*
	 * Switch on tuning bits.
	 * For RT2523 devices we do not need to update the R1 register.
	 */
	if (!rt2x00_rf(&rt2x00dev->chip, RF2523))
		rt2x00_set_field32(&rf->rf1, RF1_TUNER, 1);
	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 1);

	/*
	 * For RT2525 we should first set the channel to half band higher.
	 */
	if (rt2x00_rf(&rt2x00dev->chip, RF2525)) {
		static const u32 vals[] = {
			0x00080cbe, 0x00080d02, 0x00080d06, 0x00080d0a,
			0x00080d0e, 0x00080d12, 0x00080d16, 0x00080d1a,
			0x00080d1e, 0x00080d22, 0x00080d26, 0x00080d2a,
			0x00080d2e, 0x00080d3a
		};

		rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
		rt2500pci_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
		rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
		if (rf->rf4)
			rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);
	}

	rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
	rt2500pci_rf_write(rt2x00dev, 2, rf->rf2);
	rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
	if (rf->rf4)
		rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);

	/*
	 * Channel 14 requires the Japan filter bit to be set.
	 */
	r70 = 0x46;
	rt2x00_set_field8(&r70, BBP_R70_JAPAN_FILTER, rf->channel == 14);
	rt2500pci_bbp_write(rt2x00dev, 70, r70);

	msleep(1);

	/*
	 * Switch off tuning bits.
	 * For RT2523 devices we do not need to update the R1 register.
	 */
	if (!rt2x00_rf(&rt2x00dev->chip, RF2523)) {
		rt2x00_set_field32(&rf->rf1, RF1_TUNER, 0);
		rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
	}

	rt2x00_set_field32(&rf->rf3, RF3_TUNER, 0);
	rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);

	/*
	 * Clear false CRC during channel switch.
	 */
	rt2x00pci_register_read(rt2x00dev, CNT0, &rf->rf1);
}

static void rt2500pci_config_txpower(struct rt2x00_dev *rt2x00dev,
				     const int txpower)
{
	u32 rf3;

	rt2x00_rf_read(rt2x00dev, 3, &rf3);
	rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
	rt2500pci_rf_write(rt2x00dev, 3, rf3);
}

static void rt2500pci_config_antenna(struct rt2x00_dev *rt2x00dev,
				     struct antenna_setup *ant)
{
	u32 reg;
	u8 r14;
	u8 r2;

	rt2x00pci_register_read(rt2x00dev, BBPCSR1, &reg);
	rt2500pci_bbp_read(rt2x00dev, 14, &r14);
	rt2500pci_bbp_read(rt2x00dev, 2, &r2);

	/*
	 * Configure the TX antenna.
	 */
	switch (ant->tx) {
	case ANTENNA_A:
		rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
		rt2x00_set_field32(&reg, BBPCSR1_CCK, 0);
		rt2x00_set_field32(&reg, BBPCSR1_OFDM, 0);
		break;
	case ANTENNA_HW_DIVERSITY:
	case ANTENNA_SW_DIVERSITY:
		/*
		 * NOTE: We should never come here because rt2x00lib is
		 * supposed to catch this and send us the correct antenna
		 * explicitely. However we are nog going to bug about this.
		 * Instead, just default to antenna B.
		 */
	case ANTENNA_B:
		rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
		rt2x00_set_field32(&reg, BBPCSR1_CCK, 2);
		rt2x00_set_field32(&reg, BBPCSR1_OFDM, 2);
		break;
	}

	/*
	 * Configure the RX antenna.
	 */
	switch (ant->rx) {
	case ANTENNA_A:
		rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
		break;
	case ANTENNA_HW_DIVERSITY:
	case ANTENNA_SW_DIVERSITY:
		/*
		 * NOTE: We should never come here because rt2x00lib is
		 * supposed to catch this and send us the correct antenna
		 * explicitely. However we are nog going to bug about this.
		 * Instead, just default to antenna B.
		 */
	case ANTENNA_B:
		rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 2);
		break;
	}

	/*
	 * RT2525E and RT5222 need to flip TX I/Q
	 */
	if (rt2x00_rf(&rt2x00dev->chip, RF2525E) ||
	    rt2x00_rf(&rt2x00dev->chip, RF5222)) {
		rt2x00_set_field8(&r2, BBP_R2_TX_IQ_FLIP, 1);
		rt2x00_set_field32(&reg, BBPCSR1_CCK_FLIP, 1);
		rt2x00_set_field32(&reg, BBPCSR1_OFDM_FLIP, 1);

		/*
		 * RT2525E does not need RX I/Q Flip.
		 */
		if (rt2x00_rf(&rt2x00dev->chip, RF2525E))
			rt2x00_set_field8(&r14, BBP_R14_RX_IQ_FLIP, 0);
	} else {
		rt2x00_set_field32(&reg, BBPCSR1_CCK_FLIP, 0);
		rt2x00_set_field32(&reg, BBPCSR1_OFDM_FLIP, 0);
	}

	rt2x00pci_register_write(rt2x00dev, BBPCSR1, reg);
	rt2500pci_bbp_write(rt2x00dev, 14, r14);
	rt2500pci_bbp_write(rt2x00dev, 2, r2);
}

static void rt2500pci_config_duration(struct rt2x00_dev *rt2x00dev,
				      struct rt2x00lib_conf *libconf)
{
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);
	rt2x00_set_field32(&reg, CSR11_SLOT_TIME, libconf->slot_time);
	rt2x00pci_register_write(rt2x00dev, CSR11, reg);

	rt2x00pci_register_read(rt2x00dev, CSR18, &reg);
	rt2x00_set_field32(&reg, CSR18_SIFS, libconf->sifs);
	rt2x00_set_field32(&reg, CSR18_PIFS, libconf->pifs);
	rt2x00pci_register_write(rt2x00dev, CSR18, reg);

	rt2x00pci_register_read(rt2x00dev, CSR19, &reg);
	rt2x00_set_field32(&reg, CSR19_DIFS, libconf->difs);
	rt2x00_set_field32(&reg, CSR19_EIFS, libconf->eifs);
	rt2x00pci_register_write(rt2x00dev, CSR19, reg);

	rt2x00pci_register_read(rt2x00dev, TXCSR1, &reg);
	rt2x00_set_field32(&reg, TXCSR1_TSF_OFFSET, IEEE80211_HEADER);
	rt2x00_set_field32(&reg, TXCSR1_AUTORESPONDER, 1);
	rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);

	rt2x00pci_register_read(rt2x00dev, CSR12, &reg);
	rt2x00_set_field32(&reg, CSR12_BEACON_INTERVAL,
			   libconf->conf->beacon_int * 16);
	rt2x00_set_field32(&reg, CSR12_CFP_MAX_DURATION,
			   libconf->conf->beacon_int * 16);
	rt2x00pci_register_write(rt2x00dev, CSR12, reg);
}

static void rt2500pci_config(struct rt2x00_dev *rt2x00dev,
			     struct rt2x00lib_conf *libconf,
			     const unsigned int flags)
{
	if (flags & CONFIG_UPDATE_PHYMODE)
		rt2500pci_config_phymode(rt2x00dev, libconf->basic_rates);
	if (flags & CONFIG_UPDATE_CHANNEL)
		rt2500pci_config_channel(rt2x00dev, &libconf->rf,
					 libconf->conf->power_level);
	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
		rt2500pci_config_txpower(rt2x00dev,
					 libconf->conf->power_level);
	if (flags & CONFIG_UPDATE_ANTENNA)
		rt2500pci_config_antenna(rt2x00dev, &libconf->ant);
	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
		rt2500pci_config_duration(rt2x00dev, libconf);
}

/*
 * Link tuning
 */
static void rt2500pci_link_stats(struct rt2x00_dev *rt2x00dev,
				 struct link_qual *qual)
{
	u32 reg;

	/*
	 * Update FCS error count from register.
	 */
	rt2x00pci_register_read(rt2x00dev, CNT0, &reg);
	qual->rx_failed = rt2x00_get_field32(reg, CNT0_FCS_ERROR);

	/*
	 * Update False CCA count from register.
	 */
	rt2x00pci_register_read(rt2x00dev, CNT3, &reg);
	qual->false_cca = rt2x00_get_field32(reg, CNT3_FALSE_CCA);
}

static void rt2500pci_reset_tuner(struct rt2x00_dev *rt2x00dev)
{
	rt2500pci_bbp_write(rt2x00dev, 17, 0x48);
	rt2x00dev->link.vgc_level = 0x48;
}

static void rt2500pci_link_tuner(struct rt2x00_dev *rt2x00dev)
{
	int rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
	u8 r17;

	/*
	 * To prevent collisions with MAC ASIC on chipsets
	 * up to version C the link tuning should halt after 20
	 * seconds while being associated.
	 */
	if (rt2x00_rev(&rt2x00dev->chip) < RT2560_VERSION_D &&
	    rt2x00dev->intf_associated &&
	    rt2x00dev->link.count > 20)
		return;

	rt2500pci_bbp_read(rt2x00dev, 17, &r17);

	/*
	 * Chipset versions C and lower should directly continue
	 * to the dynamic CCA tuning. Chipset version D and higher
	 * should go straight to dynamic CCA tuning when they
	 * are not associated.
	 */
	if (rt2x00_rev(&rt2x00dev->chip) < RT2560_VERSION_D ||
	    !rt2x00dev->intf_associated)
		goto dynamic_cca_tune;

	/*
	 * A too low RSSI will cause too much false CCA which will
	 * then corrupt the R17 tuning. To remidy this the tuning should
	 * be stopped (While making sure the R17 value will not exceed limits)
	 */
	if (rssi < -80 && rt2x00dev->link.count > 20) {
		if (r17 >= 0x41) {
			r17 = rt2x00dev->link.vgc_level;
			rt2500pci_bbp_write(rt2x00dev, 17, r17);
		}
		return;
	}

	/*
	 * Special big-R17 for short distance
	 */
	if (rssi >= -58) {
		if (r17 != 0x50)
			rt2500pci_bbp_write(rt2x00dev, 17, 0x50);
		return;
	}

	/*
	 * Special mid-R17 for middle distance
	 */
	if (rssi >= -74) {
		if (r17 != 0x41)
			rt2500pci_bbp_write(rt2x00dev, 17, 0x41);
		return;
	}

	/*
	 * Leave short or middle distance condition, restore r17
	 * to the dynamic tuning range.
	 */
	if (r17 >= 0x41) {
		rt2500pci_bbp_write(rt2x00dev, 17, rt2x00dev->link.vgc_level);
		return;
	}

dynamic_cca_tune:

	/*
	 * R17 is inside the dynamic tuning range,
	 * start tuning the link based on the false cca counter.
	 */
	if (rt2x00dev->link.qual.false_cca > 512 && r17 < 0x40) {
		rt2500pci_bbp_write(rt2x00dev, 17, ++r17);
		rt2x00dev->link.vgc_level = r17;
	} else if (rt2x00dev->link.qual.false_cca < 100 && r17 > 0x32) {
		rt2500pci_bbp_write(rt2x00dev, 17, --r17);
		rt2x00dev->link.vgc_level = r17;
	}
}

/*
 * Initialization functions.
 */
static void rt2500pci_init_rxentry(struct rt2x00_dev *rt2x00dev,
				   struct queue_entry *entry)
{
	struct queue_entry_priv_pci_rx *priv_rx = entry->priv_data;
	u32 word;

	rt2x00_desc_read(priv_rx->desc, 1, &word);
	rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, priv_rx->data_dma);
	rt2x00_desc_write(priv_rx->desc, 1, word);

	rt2x00_desc_read(priv_rx->desc, 0, &word);
	rt2x00_set_field32(&word, RXD_W0_OWNER_NIC, 1);
	rt2x00_desc_write(priv_rx->desc, 0, word);
}

static void rt2500pci_init_txentry(struct rt2x00_dev *rt2x00dev,
				   struct queue_entry *entry)
{
	struct queue_entry_priv_pci_tx *priv_tx = entry->priv_data;
	u32 word;

	rt2x00_desc_read(priv_tx->desc, 1, &word);
	rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, priv_tx->data_dma);
	rt2x00_desc_write(priv_tx->desc, 1, word);

	rt2x00_desc_read(priv_tx->desc, 0, &word);
	rt2x00_set_field32(&word, TXD_W0_VALID, 0);
	rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 0);
	rt2x00_desc_write(priv_tx->desc, 0, word);
}

static int rt2500pci_init_queues(struct rt2x00_dev *rt2x00dev)
{
	struct queue_entry_priv_pci_rx *priv_rx;
	struct queue_entry_priv_pci_tx *priv_tx;
	u32 reg;

	/*
	 * Initialize registers.
	 */
	rt2x00pci_register_read(rt2x00dev, TXCSR2, &reg);
	rt2x00_set_field32(&reg, TXCSR2_TXD_SIZE, rt2x00dev->tx[0].desc_size);
	rt2x00_set_field32(&reg, TXCSR2_NUM_TXD, rt2x00dev->tx[1].limit);
	rt2x00_set_field32(&reg, TXCSR2_NUM_ATIM, rt2x00dev->bcn[1].limit);
	rt2x00_set_field32(&reg, TXCSR2_NUM_PRIO, rt2x00dev->tx[0].limit);
	rt2x00pci_register_write(rt2x00dev, TXCSR2, reg);

	priv_tx = rt2x00dev->tx[1].entries[0].priv_data;
	rt2x00pci_register_read(rt2x00dev, TXCSR3, &reg);
	rt2x00_set_field32(&reg, TXCSR3_TX_RING_REGISTER,
			   priv_tx->desc_dma);
	rt2x00pci_register_write(rt2x00dev, TXCSR3, reg);

	priv_tx = rt2x00dev->tx[0].entries[0].priv_data;
	rt2x00pci_register_read(rt2x00dev, TXCSR5, &reg);
	rt2x00_set_field32(&reg, TXCSR5_PRIO_RING_REGISTER,
			   priv_tx->desc_dma);
	rt2x00pci_register_write(rt2x00dev, TXCSR5, reg);

	priv_tx = rt2x00dev->bcn[1].entries[0].priv_data;
	rt2x00pci_register_read(rt2x00dev, TXCSR4, &reg);
	rt2x00_set_field32(&reg, TXCSR4_ATIM_RING_REGISTER,
			   priv_tx->desc_dma);
	rt2x00pci_register_write(rt2x00dev, TXCSR4, reg);

	priv_tx = rt2x00dev->bcn[0].entries[0].priv_data;
	rt2x00pci_register_read(rt2x00dev, TXCSR6, &reg);
	rt2x00_set_field32(&reg, TXCSR6_BEACON_RING_REGISTER,
			   priv_tx->desc_dma);
	rt2x00pci_register_write(rt2x00dev, TXCSR6, reg);

	rt2x00pci_register_read(rt2x00dev, RXCSR1, &reg);
	rt2x00_set_field32(&reg, RXCSR1_RXD_SIZE, rt2x00dev->rx->desc_size);
	rt2x00_set_field32(&reg, RXCSR1_NUM_RXD, rt2x00dev->rx->limit);
	rt2x00pci_register_write(rt2x00dev, RXCSR1, reg);

	priv_rx = rt2x00dev->rx->entries[0].priv_data;
	rt2x00pci_register_read(rt2x00dev, RXCSR2, &reg);
	rt2x00_set_field32(&reg, RXCSR2_RX_RING_REGISTER, priv_tx->desc_dma);
	rt2x00pci_register_write(rt2x00dev, RXCSR2, reg);

	return 0;
}

static int rt2500pci_init_registers(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;

	rt2x00pci_register_write(rt2x00dev, PSCSR0, 0x00020002);
	rt2x00pci_register_write(rt2x00dev, PSCSR1, 0x00000002);
	rt2x00pci_register_write(rt2x00dev, PSCSR2, 0x00020002);
	rt2x00pci_register_write(rt2x00dev, PSCSR3, 0x00000002);

	rt2x00pci_register_read(rt2x00dev, TIMECSR, &reg);
	rt2x00_set_field32(&reg, TIMECSR_US_COUNT, 33);
	rt2x00_set_field32(&reg, TIMECSR_US_64_COUNT, 63);
	rt2x00_set_field32(&reg, TIMECSR_BEACON_EXPECT, 0);
	rt2x00pci_register_write(rt2x00dev, TIMECSR, reg);

	rt2x00pci_register_read(rt2x00dev, CSR9, &reg);
	rt2x00_set_field32(&reg, CSR9_MAX_FRAME_UNIT,
			   rt2x00dev->rx->data_size / 128);
	rt2x00pci_register_write(rt2x00dev, CSR9, reg);

	/*
	 * Always use CWmin and CWmax set in descriptor.
	 */
	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);
	rt2x00_set_field32(&reg, CSR11_CW_SELECT, 0);
	rt2x00pci_register_write(rt2x00dev, CSR11, reg);

	rt2x00pci_register_read(rt2x00dev, LEDCSR, &reg);
	rt2x00_set_field32(&reg, LEDCSR_ON_PERIOD, 70);
	rt2x00_set_field32(&reg, LEDCSR_OFF_PERIOD, 30);
	rt2x00pci_register_write(rt2x00dev, LEDCSR, reg);

	rt2x00pci_register_write(rt2x00dev, CNT3, 0);

	rt2x00pci_register_read(rt2x00dev, TXCSR8, &reg);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID0, 10);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID0_VALID, 1);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID1, 11);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID1_VALID, 1);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID2, 13);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID2_VALID, 1);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID3, 12);
	rt2x00_set_field32(&reg, TXCSR8_BBP_ID3_VALID, 1);
	rt2x00pci_register_write(rt2x00dev, TXCSR8, reg);

	rt2x00pci_register_read(rt2x00dev, ARTCSR0, &reg);
	rt2x00_set_field32(&reg, ARTCSR0_ACK_CTS_1MBS, 112);
	rt2x00_set_field32(&reg, ARTCSR0_ACK_CTS_2MBS, 56);
	rt2x00_set_field32(&reg, ARTCSR0_ACK_CTS_5_5MBS, 20);
	rt2x00_set_field32(&reg, ARTCSR0_ACK_CTS_11MBS, 10);
	rt2x00pci_register_write(rt2x00dev, ARTCSR0, reg);

	rt2x00pci_register_read(rt2x00dev, ARTCSR1, &reg);
	rt2x00_set_field32(&reg, ARTCSR1_ACK_CTS_6MBS, 45);
	rt2x00_set_field32(&reg, ARTCSR1_ACK_CTS_9MBS, 37);
	rt2x00_set_field32(&reg, ARTCSR1_ACK_CTS_12MBS, 33);
	rt2x00_set_field32(&reg, ARTCSR1_ACK_CTS_18MBS, 29);
	rt2x00pci_register_write(rt2x00dev, ARTCSR1, reg);

	rt2x00pci_register_read(rt2x00dev, ARTCSR2, &reg);
	rt2x00_set_field32(&reg, ARTCSR2_ACK_CTS_24MBS, 29);
	rt2x00_set_field32(&reg, ARTCSR2_ACK_CTS_36MBS, 25);
	rt2x00_set_field32(&reg, ARTCSR2_ACK_CTS_48MBS, 25);
	rt2x00_set_field32(&reg, ARTCSR2_ACK_CTS_54MBS, 25);
	rt2x00pci_register_write(rt2x00dev, ARTCSR2, reg);

	rt2x00pci_register_read(rt2x00dev, RXCSR3, &reg);
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID0, 47); /* CCK Signal */
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID0_VALID, 1);
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID1, 51); /* Rssi */
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID1_VALID, 1);
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID2, 42); /* OFDM Rate */
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID2_VALID, 1);
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID3, 51); /* RSSI */
	rt2x00_set_field32(&reg, RXCSR3_BBP_ID3_VALID, 1);
	rt2x00pci_register_write(rt2x00dev, RXCSR3, reg);

	rt2x00pci_register_read(rt2x00dev, PCICSR, &reg);
	rt2x00_set_field32(&reg, PCICSR_BIG_ENDIAN, 0);
	rt2x00_set_field32(&reg, PCICSR_RX_TRESHOLD, 0);
	rt2x00_set_field32(&reg, PCICSR_TX_TRESHOLD, 3);
	rt2x00_set_field32(&reg, PCICSR_BURST_LENTH, 1);
	rt2x00_set_field32(&reg, PCICSR_ENABLE_CLK, 1);
	rt2x00_set_field32(&reg, PCICSR_READ_MULTIPLE, 1);
	rt2x00_set_field32(&reg, PCICSR_WRITE_INVALID, 1);
	rt2x00pci_register_write(rt2x00dev, PCICSR, reg);

	rt2x00pci_register_write(rt2x00dev, PWRCSR0, 0x3f3b3100);

	rt2x00pci_register_write(rt2x00dev, GPIOCSR, 0x0000ff00);
	rt2x00pci_register_write(rt2x00dev, TESTCSR, 0x000000f0);

	if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
		return -EBUSY;

	rt2x00pci_register_write(rt2x00dev, MACCSR0, 0x00213223);
	rt2x00pci_register_write(rt2x00dev, MACCSR1, 0x00235518);

	rt2x00pci_register_read(rt2x00dev, MACCSR2, &reg);
	rt2x00_set_field32(&reg, MACCSR2_DELAY, 64);
	rt2x00pci_register_write(rt2x00dev, MACCSR2, reg);

	rt2x00pci_register_read(rt2x00dev, RALINKCSR, &reg);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_DATA0, 17);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_ID0, 26);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_VALID0, 1);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_DATA1, 0);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_ID1, 26);
	rt2x00_set_field32(&reg, RALINKCSR_AR_BBP_VALID1, 1);
	rt2x00pci_register_write(rt2x00dev, RALINKCSR, reg);

	rt2x00pci_register_write(rt2x00dev, BBPCSR1, 0x82188200);

	rt2x00pci_register_write(rt2x00dev, TXACKCSR0, 0x00000020);

	rt2x00pci_register_read(rt2x00dev, CSR1, &reg);
	rt2x00_set_field32(&reg, CSR1_SOFT_RESET, 1);
	rt2x00_set_field32(&reg, CSR1_BBP_RESET, 0);
	rt2x00_set_field32(&reg, CSR1_HOST_READY, 0);
	rt2x00pci_register_write(rt2x00dev, CSR1, reg);

	rt2x00pci_register_read(rt2x00dev, CSR1, &reg);
	rt2x00_set_field32(&reg, CSR1_SOFT_RESET, 0);
	rt2x00_set_field32(&reg, CSR1_HOST_READY, 1);
	rt2x00pci_register_write(rt2x00dev, CSR1, reg);

	/*
	 * We must clear the FCS and FIFO error count.
	 * These registers are cleared on read,
	 * so we may pass a useless variable to store the value.
	 */
	rt2x00pci_register_read(rt2x00dev, CNT0, &reg);
	rt2x00pci_register_read(rt2x00dev, CNT4, &reg);

	return 0;
}

static int rt2500pci_init_bbp(struct rt2x00_dev *rt2x00dev)
{
	unsigned int i;
	u16 eeprom;
	u8 reg_id;
	u8 value;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2500pci_bbp_read(rt2x00dev, 0, &value);
		if ((value != 0xff) && (value != 0x00))
			goto continue_csr_init;
		NOTICE(rt2x00dev, "Waiting for BBP register.\n");
		udelay(REGISTER_BUSY_DELAY);
	}

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

continue_csr_init:
	rt2500pci_bbp_write(rt2x00dev, 3, 0x02);
	rt2500pci_bbp_write(rt2x00dev, 4, 0x19);
	rt2500pci_bbp_write(rt2x00dev, 14, 0x1c);
	rt2500pci_bbp_write(rt2x00dev, 15, 0x30);
	rt2500pci_bbp_write(rt2x00dev, 16, 0xac);
	rt2500pci_bbp_write(rt2x00dev, 18, 0x18);
	rt2500pci_bbp_write(rt2x00dev, 19, 0xff);
	rt2500pci_bbp_write(rt2x00dev, 20, 0x1e);
	rt2500pci_bbp_write(rt2x00dev, 21, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 22, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 23, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 24, 0x70);
	rt2500pci_bbp_write(rt2x00dev, 25, 0x40);
	rt2500pci_bbp_write(rt2x00dev, 26, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 27, 0x23);
	rt2500pci_bbp_write(rt2x00dev, 30, 0x10);
	rt2500pci_bbp_write(rt2x00dev, 31, 0x2b);
	rt2500pci_bbp_write(rt2x00dev, 32, 0xb9);
	rt2500pci_bbp_write(rt2x00dev, 34, 0x12);
	rt2500pci_bbp_write(rt2x00dev, 35, 0x50);
	rt2500pci_bbp_write(rt2x00dev, 39, 0xc4);
	rt2500pci_bbp_write(rt2x00dev, 40, 0x02);
	rt2500pci_bbp_write(rt2x00dev, 41, 0x60);
	rt2500pci_bbp_write(rt2x00dev, 53, 0x10);
	rt2500pci_bbp_write(rt2x00dev, 54, 0x18);
	rt2500pci_bbp_write(rt2x00dev, 56, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 57, 0x10);
	rt2500pci_bbp_write(rt2x00dev, 58, 0x08);
	rt2500pci_bbp_write(rt2x00dev, 61, 0x6d);
	rt2500pci_bbp_write(rt2x00dev, 62, 0x10);

	for (i = 0; i < EEPROM_BBP_SIZE; i++) {
		rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);

		if (eeprom != 0xffff && eeprom != 0x0000) {
			reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
			value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
			rt2500pci_bbp_write(rt2x00dev, reg_id, value);
		}
	}

	return 0;
}

/*
 * Device state switch handlers.
 */
static void rt2500pci_toggle_rx(struct rt2x00_dev *rt2x00dev,
				enum dev_state state)
{
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, RXCSR0, &reg);
	rt2x00_set_field32(&reg, RXCSR0_DISABLE_RX,
			   state == STATE_RADIO_RX_OFF);
	rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
}

static void rt2500pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
				 enum dev_state state)
{
	int mask = (state == STATE_RADIO_IRQ_OFF);
	u32 reg;

	/*
	 * When interrupts are being enabled, the interrupt registers
	 * should clear the register to assure a clean state.
	 */
	if (state == STATE_RADIO_IRQ_ON) {
		rt2x00pci_register_read(rt2x00dev, CSR7, &reg);
		rt2x00pci_register_write(rt2x00dev, CSR7, reg);
	}

	/*
	 * Only toggle the interrupts bits we are going to use.
	 * Non-checked interrupt bits are disabled by default.
	 */
	rt2x00pci_register_read(rt2x00dev, CSR8, &reg);
	rt2x00_set_field32(&reg, CSR8_TBCN_EXPIRE, mask);
	rt2x00_set_field32(&reg, CSR8_TXDONE_TXRING, mask);
	rt2x00_set_field32(&reg, CSR8_TXDONE_ATIMRING, mask);
	rt2x00_set_field32(&reg, CSR8_TXDONE_PRIORING, mask);
	rt2x00_set_field32(&reg, CSR8_RXDONE, mask);
	rt2x00pci_register_write(rt2x00dev, CSR8, reg);
}

static int rt2500pci_enable_radio(struct rt2x00_dev *rt2x00dev)
{
	/*
	 * Initialize all registers.
	 */
	if (rt2500pci_init_queues(rt2x00dev) ||
	    rt2500pci_init_registers(rt2x00dev) ||
	    rt2500pci_init_bbp(rt2x00dev)) {
		ERROR(rt2x00dev, "Register initialization failed.\n");
		return -EIO;
	}

	/*
	 * Enable interrupts.
	 */
	rt2500pci_toggle_irq(rt2x00dev, STATE_RADIO_IRQ_ON);

	return 0;
}

static void rt2500pci_disable_radio(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;

	rt2x00pci_register_write(rt2x00dev, PWRCSR0, 0);

	/*
	 * Disable synchronisation.
	 */
	rt2x00pci_register_write(rt2x00dev, CSR14, 0);

	/*
	 * Cancel RX and TX.
	 */
	rt2x00pci_register_read(rt2x00dev, TXCSR0, &reg);
	rt2x00_set_field32(&reg, TXCSR0_ABORT, 1);
	rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);

	/*
	 * Disable interrupts.
	 */
	rt2500pci_toggle_irq(rt2x00dev, STATE_RADIO_IRQ_OFF);
}

static int rt2500pci_set_state(struct rt2x00_dev *rt2x00dev,
			       enum dev_state state)
{
	u32 reg;
	unsigned int i;
	char put_to_sleep;
	char bbp_state;
	char rf_state;

	put_to_sleep = (state != STATE_AWAKE);

	rt2x00pci_register_read(rt2x00dev, PWRCSR1, &reg);
	rt2x00_set_field32(&reg, PWRCSR1_SET_STATE, 1);
	rt2x00_set_field32(&reg, PWRCSR1_BBP_DESIRE_STATE, state);
	rt2x00_set_field32(&reg, PWRCSR1_RF_DESIRE_STATE, state);
	rt2x00_set_field32(&reg, PWRCSR1_PUT_TO_SLEEP, put_to_sleep);
	rt2x00pci_register_write(rt2x00dev, PWRCSR1, reg);

	/*
	 * Device is not guaranteed to be in the requested state yet.
	 * We must wait until the register indicates that the
	 * device has entered the correct state.
	 */
	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2x00pci_register_read(rt2x00dev, PWRCSR1, &reg);
		bbp_state = rt2x00_get_field32(reg, PWRCSR1_BBP_CURR_STATE);
		rf_state = rt2x00_get_field32(reg, PWRCSR1_RF_CURR_STATE);
		if (bbp_state == state && rf_state == state)
			return 0;
		msleep(10);
	}

	NOTICE(rt2x00dev, "Device failed to enter state %d, "
	       "current device state: bbp %d and rf %d.\n",
	       state, bbp_state, rf_state);

	return -EBUSY;
}

static int rt2500pci_set_device_state(struct rt2x00_dev *rt2x00dev,
				      enum dev_state state)
{
	int retval = 0;

	switch (state) {
	case STATE_RADIO_ON:
		retval = rt2500pci_enable_radio(rt2x00dev);
		break;
	case STATE_RADIO_OFF:
		rt2500pci_disable_radio(rt2x00dev);
		break;
	case STATE_RADIO_RX_ON:
	case STATE_RADIO_RX_ON_LINK:
		rt2500pci_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
		break;
	case STATE_RADIO_RX_OFF:
	case STATE_RADIO_RX_OFF_LINK:
		rt2500pci_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
		break;
	case STATE_DEEP_SLEEP:
	case STATE_SLEEP:
	case STATE_STANDBY:
	case STATE_AWAKE:
		retval = rt2500pci_set_state(rt2x00dev, state);
		break;
	default:
		retval = -ENOTSUPP;
		break;
	}

	return retval;
}

/*
 * TX descriptor initialization
 */
static void rt2500pci_write_tx_desc(struct rt2x00_dev *rt2x00dev,
				    struct sk_buff *skb,
				    struct txentry_desc *txdesc,
				    struct ieee80211_tx_control *control)
{
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
	__le32 *txd = skbdesc->desc;
	u32 word;

	/*
	 * Start writing the descriptor words.
	 */
	rt2x00_desc_read(txd, 2, &word);
	rt2x00_set_field32(&word, TXD_W2_IV_OFFSET, IEEE80211_HEADER);
	rt2x00_set_field32(&word, TXD_W2_AIFS, txdesc->aifs);
	rt2x00_set_field32(&word, TXD_W2_CWMIN, txdesc->cw_min);
	rt2x00_set_field32(&word, TXD_W2_CWMAX, txdesc->cw_max);
	rt2x00_desc_write(txd, 2, word);

	rt2x00_desc_read(txd, 3, &word);
	rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL, txdesc->signal);
	rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE, txdesc->service);
	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_LOW, txdesc->length_low);
	rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_HIGH, txdesc->length_high);
	rt2x00_desc_write(txd, 3, word);

	rt2x00_desc_read(txd, 10, &word);
	rt2x00_set_field32(&word, TXD_W10_RTS,
			   test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags));
	rt2x00_desc_write(txd, 10, word);

	rt2x00_desc_read(txd, 0, &word);
	rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 1);
	rt2x00_set_field32(&word, TXD_W0_VALID, 1);
	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
			   test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
	rt2x00_set_field32(&word, TXD_W0_ACK,
			   test_bit(ENTRY_TXD_ACK, &txdesc->flags));
	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));
	rt2x00_set_field32(&word, TXD_W0_OFDM,
			   test_bit(ENTRY_TXD_OFDM_RATE, &txdesc->flags));
	rt2x00_set_field32(&word, TXD_W0_CIPHER_OWNER, 1);
	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);
	rt2x00_set_field32(&word, TXD_W0_RETRY_MODE,
			   !!(control->flags &
			      IEEE80211_TXCTL_LONG_RETRY_LIMIT));
	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
	rt2x00_set_field32(&word, TXD_W0_CIPHER_ALG, CIPHER_NONE);
	rt2x00_desc_write(txd, 0, word);
}

/*
 * TX data initialization
 */
static void rt2500pci_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
				    const unsigned int queue)
{
	u32 reg;

	if (queue == RT2X00_BCN_QUEUE_BEACON) {
		rt2x00pci_register_read(rt2x00dev, CSR14, &reg);
		if (!rt2x00_get_field32(reg, CSR14_BEACON_GEN)) {
			rt2x00_set_field32(&reg, CSR14_TSF_COUNT, 1);
			rt2x00_set_field32(&reg, CSR14_TBCN, 1);
			rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 1);
			rt2x00pci_register_write(rt2x00dev, CSR14, reg);
		}
		return;
	}

	rt2x00pci_register_read(rt2x00dev, TXCSR0, &reg);
	rt2x00_set_field32(&reg, TXCSR0_KICK_PRIO,
			   (queue == IEEE80211_TX_QUEUE_DATA0));
	rt2x00_set_field32(&reg, TXCSR0_KICK_TX,
			   (queue == IEEE80211_TX_QUEUE_DATA1));
	rt2x00_set_field32(&reg, TXCSR0_KICK_ATIM,
			   (queue == RT2X00_BCN_QUEUE_ATIM));
	rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
}

/*
 * RX control handlers
 */
static void rt2500pci_fill_rxdone(struct queue_entry *entry,
				  struct rxdone_entry_desc *rxdesc)
{
	struct queue_entry_priv_pci_rx *priv_rx = entry->priv_data;
	u32 word0;
	u32 word2;

	rt2x00_desc_read(priv_rx->desc, 0, &word0);
	rt2x00_desc_read(priv_rx->desc, 2, &word2);

	rxdesc->flags = 0;
	if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
		rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
	if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
		rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;

	rxdesc->signal = rt2x00_get_field32(word2, RXD_W2_SIGNAL);
	rxdesc->rssi = rt2x00_get_field32(word2, RXD_W2_RSSI) -
	    entry->queue->rt2x00dev->rssi_offset;
	rxdesc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
	rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
	rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
}

/*
 * Interrupt functions.
 */
static void rt2500pci_txdone(struct rt2x00_dev *rt2x00dev,
			     const enum ieee80211_tx_queue queue_idx)
{
	struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, queue_idx);
	struct queue_entry_priv_pci_tx *priv_tx;
	struct queue_entry *entry;
	struct txdone_entry_desc txdesc;
	u32 word;

	while (!rt2x00queue_empty(queue)) {
		entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
		priv_tx = entry->priv_data;
		rt2x00_desc_read(priv_tx->desc, 0, &word);

		if (rt2x00_get_field32(word, TXD_W0_OWNER_NIC) ||
		    !rt2x00_get_field32(word, TXD_W0_VALID))
			break;

		/*
		 * Obtain the status about this packet.
		 */
		txdesc.status = rt2x00_get_field32(word, TXD_W0_RESULT);
		txdesc.retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT);

		rt2x00pci_txdone(rt2x00dev, entry, &txdesc);
	}
}

static irqreturn_t rt2500pci_interrupt(int irq, void *dev_instance)
{
	struct rt2x00_dev *rt2x00dev = dev_instance;
	u32 reg;

	/*
	 * Get the interrupt sources & saved to local variable.
	 * Write register value back to clear pending interrupts.
	 */
	rt2x00pci_register_read(rt2x00dev, CSR7, &reg);
	rt2x00pci_register_write(rt2x00dev, CSR7, reg);

	if (!reg)
		return IRQ_NONE;

	if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
		return IRQ_HANDLED;

	/*
	 * Handle interrupts, walk through all bits
	 * and run the tasks, the bits are checked in order of
	 * priority.
	 */

	/*
	 * 1 - Beacon timer expired interrupt.
	 */
	if (rt2x00_get_field32(reg, CSR7_TBCN_EXPIRE))
		rt2x00lib_beacondone(rt2x00dev);

	/*
	 * 2 - Rx ring done interrupt.
	 */
	if (rt2x00_get_field32(reg, CSR7_RXDONE))
		rt2x00pci_rxdone(rt2x00dev);

	/*
	 * 3 - Atim ring transmit done interrupt.
	 */
	if (rt2x00_get_field32(reg, CSR7_TXDONE_ATIMRING))
		rt2500pci_txdone(rt2x00dev, RT2X00_BCN_QUEUE_ATIM);

	/*
	 * 4 - Priority ring transmit done interrupt.
	 */
	if (rt2x00_get_field32(reg, CSR7_TXDONE_PRIORING))
		rt2500pci_txdone(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);

	/*
	 * 5 - Tx ring transmit done interrupt.
	 */
	if (rt2x00_get_field32(reg, CSR7_TXDONE_TXRING))
		rt2500pci_txdone(rt2x00dev, IEEE80211_TX_QUEUE_DATA1);

	return IRQ_HANDLED;
}

/*
 * Device probe functions.
 */
static int rt2500pci_validate_eeprom(struct rt2x00_dev *rt2x00dev)
{
	struct eeprom_93cx6 eeprom;
	u32 reg;
	u16 word;
	u8 *mac;

	rt2x00pci_register_read(rt2x00dev, CSR21, &reg);

	eeprom.data = rt2x00dev;
	eeprom.register_read = rt2500pci_eepromregister_read;
	eeprom.register_write = rt2500pci_eepromregister_write;
	eeprom.width = rt2x00_get_field32(reg, CSR21_TYPE_93C46) ?
	    PCI_EEPROM_WIDTH_93C46 : PCI_EEPROM_WIDTH_93C66;
	eeprom.reg_data_in = 0;
	eeprom.reg_data_out = 0;
	eeprom.reg_data_clock = 0;
	eeprom.reg_chip_select = 0;

	eeprom_93cx6_multiread(&eeprom, EEPROM_BASE, rt2x00dev->eeprom,
			       EEPROM_SIZE / sizeof(u16));

	/*
	 * Start validation of the data that has been read.
	 */
	mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
	if (!is_valid_ether_addr(mac)) {
		DECLARE_MAC_BUF(macbuf);

		random_ether_addr(mac);
		EEPROM(rt2x00dev, "MAC: %s\n",
		       print_mac(macbuf, mac));
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_TX_DEFAULT,
				   ANTENNA_SW_DIVERSITY);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_RX_DEFAULT,
				   ANTENNA_SW_DIVERSITY);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_LED_MODE,
				   LED_MODE_DEFAULT);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_DYN_TXAGC, 0);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_HARDWARE_RADIO, 0);
		rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF2522);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
		EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_NIC_CARDBUS_ACCEL, 0);
		rt2x00_set_field16(&word, EEPROM_NIC_DYN_BBP_TUNE, 0);
		rt2x00_set_field16(&word, EEPROM_NIC_CCK_TX_POWER, 0);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
		EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_CALIBRATE_OFFSET_RSSI,
				   DEFAULT_RSSI_OFFSET);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_CALIBRATE_OFFSET, word);
		EEPROM(rt2x00dev, "Calibrate offset: 0x%04x\n", word);
	}

	return 0;
}

static int rt2500pci_init_eeprom(struct rt2x00_dev *rt2x00dev)
{
	u32 reg;
	u16 value;
	u16 eeprom;

	/*
	 * Read EEPROM word for configuration.
	 */
	rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);

	/*
	 * Identify RF chipset.
	 */
	value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
	rt2x00pci_register_read(rt2x00dev, CSR0, &reg);
	rt2x00_set_chip(rt2x00dev, RT2560, value, reg);

	if (!rt2x00_rf(&rt2x00dev->chip, RF2522) &&
	    !rt2x00_rf(&rt2x00dev->chip, RF2523) &&
	    !rt2x00_rf(&rt2x00dev->chip, RF2524) &&
	    !rt2x00_rf(&rt2x00dev->chip, RF2525) &&
	    !rt2x00_rf(&rt2x00dev->chip, RF2525E) &&
	    !rt2x00_rf(&rt2x00dev->chip, RF5222)) {
		ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
		return -ENODEV;
	}

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

	/*
	 * Store led mode, for correct led behaviour.
	 */
#ifdef CONFIG_RT2500PCI_LEDS
	value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_LED_MODE);

	switch (value) {
	case LED_MODE_ASUS:
	case LED_MODE_ALPHA:
	case LED_MODE_DEFAULT:
		rt2x00dev->led_flags = LED_SUPPORT_RADIO;
		break;
	case LED_MODE_TXRX_ACTIVITY:
		rt2x00dev->led_flags =
		    LED_SUPPORT_RADIO | LED_SUPPORT_ACTIVITY;
		break;
	case LED_MODE_SIGNAL_STRENGTH:
		rt2x00dev->led_flags = LED_SUPPORT_RADIO;
		break;
	}
#endif /* CONFIG_RT2500PCI_LEDS */

	/*
	 * Detect if this device has an hardware controlled radio.
	 */
#ifdef CONFIG_RT2500PCI_RFKILL
	if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_HARDWARE_RADIO))
		__set_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags);
#endif /* CONFIG_RT2500PCI_RFKILL */

	/*
	 * Check if the BBP tuning should be enabled.
	 */
	rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);

	if (rt2x00_get_field16(eeprom, EEPROM_NIC_DYN_BBP_TUNE))
		__set_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags);

	/*
	 * Read the RSSI <-> dBm offset information.
	 */
	rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &eeprom);
	rt2x00dev->rssi_offset =
	    rt2x00_get_field16(eeprom, EEPROM_CALIBRATE_OFFSET_RSSI);

	return 0;
}

/*
 * RF value list for RF2522
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_bg_2522[] = {
	{ 1,  0x00002050, 0x000c1fda, 0x00000101, 0 },
	{ 2,  0x00002050, 0x000c1fee, 0x00000101, 0 },
	{ 3,  0x00002050, 0x000c2002, 0x00000101, 0 },
	{ 4,  0x00002050, 0x000c2016, 0x00000101, 0 },
	{ 5,  0x00002050, 0x000c202a, 0x00000101, 0 },
	{ 6,  0x00002050, 0x000c203e, 0x00000101, 0 },
	{ 7,  0x00002050, 0x000c2052, 0x00000101, 0 },
	{ 8,  0x00002050, 0x000c2066, 0x00000101, 0 },
	{ 9,  0x00002050, 0x000c207a, 0x00000101, 0 },
	{ 10, 0x00002050, 0x000c208e, 0x00000101, 0 },
	{ 11, 0x00002050, 0x000c20a2, 0x00000101, 0 },
	{ 12, 0x00002050, 0x000c20b6, 0x00000101, 0 },
	{ 13, 0x00002050, 0x000c20ca, 0x00000101, 0 },
	{ 14, 0x00002050, 0x000c20fa, 0x00000101, 0 },
};

/*
 * RF value list for RF2523
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_bg_2523[] = {
	{ 1,  0x00022010, 0x00000c9e, 0x000e0111, 0x00000a1b },
	{ 2,  0x00022010, 0x00000ca2, 0x000e0111, 0x00000a1b },
	{ 3,  0x00022010, 0x00000ca6, 0x000e0111, 0x00000a1b },
	{ 4,  0x00022010, 0x00000caa, 0x000e0111, 0x00000a1b },
	{ 5,  0x00022010, 0x00000cae, 0x000e0111, 0x00000a1b },
	{ 6,  0x00022010, 0x00000cb2, 0x000e0111, 0x00000a1b },
	{ 7,  0x00022010, 0x00000cb6, 0x000e0111, 0x00000a1b },
	{ 8,  0x00022010, 0x00000cba, 0x000e0111, 0x00000a1b },
	{ 9,  0x00022010, 0x00000cbe, 0x000e0111, 0x00000a1b },
	{ 10, 0x00022010, 0x00000d02, 0x000e0111, 0x00000a1b },
	{ 11, 0x00022010, 0x00000d06, 0x000e0111, 0x00000a1b },
	{ 12, 0x00022010, 0x00000d0a, 0x000e0111, 0x00000a1b },
	{ 13, 0x00022010, 0x00000d0e, 0x000e0111, 0x00000a1b },
	{ 14, 0x00022010, 0x00000d1a, 0x000e0111, 0x00000a03 },
};

/*
 * RF value list for RF2524
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_bg_2524[] = {
	{ 1,  0x00032020, 0x00000c9e, 0x00000101, 0x00000a1b },
	{ 2,  0x00032020, 0x00000ca2, 0x00000101, 0x00000a1b },
	{ 3,  0x00032020, 0x00000ca6, 0x00000101, 0x00000a1b },
	{ 4,  0x00032020, 0x00000caa, 0x00000101, 0x00000a1b },
	{ 5,  0x00032020, 0x00000cae, 0x00000101, 0x00000a1b },
	{ 6,  0x00032020, 0x00000cb2, 0x00000101, 0x00000a1b },
	{ 7,  0x00032020, 0x00000cb6, 0x00000101, 0x00000a1b },
	{ 8,  0x00032020, 0x00000cba, 0x00000101, 0x00000a1b },
	{ 9,  0x00032020, 0x00000cbe, 0x00000101, 0x00000a1b },
	{ 10, 0x00032020, 0x00000d02, 0x00000101, 0x00000a1b },
	{ 11, 0x00032020, 0x00000d06, 0x00000101, 0x00000a1b },
	{ 12, 0x00032020, 0x00000d0a, 0x00000101, 0x00000a1b },
	{ 13, 0x00032020, 0x00000d0e, 0x00000101, 0x00000a1b },
	{ 14, 0x00032020, 0x00000d1a, 0x00000101, 0x00000a03 },
};

/*
 * RF value list for RF2525
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_bg_2525[] = {
	{ 1,  0x00022020, 0x00080c9e, 0x00060111, 0x00000a1b },
	{ 2,  0x00022020, 0x00080ca2, 0x00060111, 0x00000a1b },
	{ 3,  0x00022020, 0x00080ca6, 0x00060111, 0x00000a1b },
	{ 4,  0x00022020, 0x00080caa, 0x00060111, 0x00000a1b },
	{ 5,  0x00022020, 0x00080cae, 0x00060111, 0x00000a1b },
	{ 6,  0x00022020, 0x00080cb2, 0x00060111, 0x00000a1b },
	{ 7,  0x00022020, 0x00080cb6, 0x00060111, 0x00000a1b },
	{ 8,  0x00022020, 0x00080cba, 0x00060111, 0x00000a1b },
	{ 9,  0x00022020, 0x00080cbe, 0x00060111, 0x00000a1b },
	{ 10, 0x00022020, 0x00080d02, 0x00060111, 0x00000a1b },
	{ 11, 0x00022020, 0x00080d06, 0x00060111, 0x00000a1b },
	{ 12, 0x00022020, 0x00080d0a, 0x00060111, 0x00000a1b },
	{ 13, 0x00022020, 0x00080d0e, 0x00060111, 0x00000a1b },
	{ 14, 0x00022020, 0x00080d1a, 0x00060111, 0x00000a03 },
};

/*
 * RF value list for RF2525e
 * Supports: 2.4 GHz
 */
static const struct rf_channel rf_vals_bg_2525e[] = {
	{ 1,  0x00022020, 0x00081136, 0x00060111, 0x00000a0b },
	{ 2,  0x00022020, 0x0008113a, 0x00060111, 0x00000a0b },
	{ 3,  0x00022020, 0x0008113e, 0x00060111, 0x00000a0b },
	{ 4,  0x00022020, 0x00081182, 0x00060111, 0x00000a0b },
	{ 5,  0x00022020, 0x00081186, 0x00060111, 0x00000a0b },
	{ 6,  0x00022020, 0x0008118a, 0x00060111, 0x00000a0b },
	{ 7,  0x00022020, 0x0008118e, 0x00060111, 0x00000a0b },
	{ 8,  0x00022020, 0x00081192, 0x00060111, 0x00000a0b },
	{ 9,  0x00022020, 0x00081196, 0x00060111, 0x00000a0b },
	{ 10, 0x00022020, 0x0008119a, 0x00060111, 0x00000a0b },
	{ 11, 0x00022020, 0x0008119e, 0x00060111, 0x00000a0b },
	{ 12, 0x00022020, 0x000811a2, 0x00060111, 0x00000a0b },
	{ 13, 0x00022020, 0x000811a6, 0x00060111, 0x00000a0b },
	{ 14, 0x00022020, 0x000811ae, 0x00060111, 0x00000a1b },
};

/*
 * RF value list for RF5222
 * Supports: 2.4 GHz & 5.2 GHz
 */
static const struct rf_channel rf_vals_5222[] = {
	{ 1,  0x00022020, 0x00001136, 0x00000101, 0x00000a0b },
	{ 2,  0x00022020, 0x0000113a, 0x00000101, 0x00000a0b },
	{ 3,  0x00022020, 0x0000113e, 0x00000101, 0x00000a0b },
	{ 4,  0x00022020, 0x00001182, 0x00000101, 0x00000a0b },
	{ 5,  0x00022020, 0x00001186, 0x00000101, 0x00000a0b },
	{ 6,  0x00022020, 0x0000118a, 0x00000101, 0x00000a0b },
	{ 7,  0x00022020, 0x0000118e, 0x00000101, 0x00000a0b },
	{ 8,  0x00022020, 0x00001192, 0x00000101, 0x00000a0b },
	{ 9,  0x00022020, 0x00001196, 0x00000101, 0x00000a0b },
	{ 10, 0x00022020, 0x0000119a, 0x00000101, 0x00000a0b },
	{ 11, 0x00022020, 0x0000119e, 0x00000101, 0x00000a0b },
	{ 12, 0x00022020, 0x000011a2, 0x00000101, 0x00000a0b },
	{ 13, 0x00022020, 0x000011a6, 0x00000101, 0x00000a0b },
	{ 14, 0x00022020, 0x000011ae, 0x00000101, 0x00000a1b },

	/* 802.11 UNI / HyperLan 2 */
	{ 36, 0x00022010, 0x00018896, 0x00000101, 0x00000a1f },
	{ 40, 0x00022010, 0x0001889a, 0x00000101, 0x00000a1f },
	{ 44, 0x00022010, 0x0001889e, 0x00000101, 0x00000a1f },
	{ 48, 0x00022010, 0x000188a2, 0x00000101, 0x00000a1f },
	{ 52, 0x00022010, 0x000188a6, 0x00000101, 0x00000a1f },
	{ 66, 0x00022010, 0x000188aa, 0x00000101, 0x00000a1f },
	{ 60, 0x00022010, 0x000188ae, 0x00000101, 0x00000a1f },
	{ 64, 0x00022010, 0x000188b2, 0x00000101, 0x00000a1f },

	/* 802.11 HyperLan 2 */
	{ 100, 0x00022010, 0x00008802, 0x00000101, 0x00000a0f },
	{ 104, 0x00022010, 0x00008806, 0x00000101, 0x00000a0f },
	{ 108, 0x00022010, 0x0000880a, 0x00000101, 0x00000a0f },
	{ 112, 0x00022010, 0x0000880e, 0x00000101, 0x00000a0f },
	{ 116, 0x00022010, 0x00008812, 0x00000101, 0x00000a0f },
	{ 120, 0x00022010, 0x00008816, 0x00000101, 0x00000a0f },
	{ 124, 0x00022010, 0x0000881a, 0x00000101, 0x00000a0f },
	{ 128, 0x00022010, 0x0000881e, 0x00000101, 0x00000a0f },
	{ 132, 0x00022010, 0x00008822, 0x00000101, 0x00000a0f },
	{ 136, 0x00022010, 0x00008826, 0x00000101, 0x00000a0f },

	/* 802.11 UNII */
	{ 140, 0x00022010, 0x0000882a, 0x00000101, 0x00000a0f },
	{ 149, 0x00022020, 0x000090a6, 0x00000101, 0x00000a07 },
	{ 153, 0x00022020, 0x000090ae, 0x00000101, 0x00000a07 },
	{ 157, 0x00022020, 0x000090b6, 0x00000101, 0x00000a07 },
	{ 161, 0x00022020, 0x000090be, 0x00000101, 0x00000a07 },
};

static void rt2500pci_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
{
	struct hw_mode_spec *spec = &rt2x00dev->spec;
	u8 *txpower;
	unsigned int i;

	/*
	 * Initialize all hw fields.
	 */
	rt2x00dev->hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
	rt2x00dev->hw->extra_tx_headroom = 0;
	rt2x00dev->hw->max_signal = MAX_SIGNAL;
	rt2x00dev->hw->max_rssi = MAX_RX_SSI;
	rt2x00dev->hw->queues = 2;

	SET_IEEE80211_DEV(rt2x00dev->hw, &rt2x00dev_pci(rt2x00dev)->dev);
	SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
				rt2x00_eeprom_addr(rt2x00dev,
						   EEPROM_MAC_ADDR_0));

	/*
	 * Convert tx_power array in eeprom.
	 */
	txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_START);
	for (i = 0; i < 14; i++)
		txpower[i] = TXPOWER_FROM_DEV(txpower[i]);

	/*
	 * Initialize hw_mode information.
	 */
	spec->supported_bands = SUPPORT_BAND_2GHZ;
	spec->supported_rates = SUPPORT_RATE_CCK | SUPPORT_RATE_OFDM;
	spec->tx_power_a = NULL;
	spec->tx_power_bg = txpower;
	spec->tx_power_default = DEFAULT_TXPOWER;

	if (rt2x00_rf(&rt2x00dev->chip, RF2522)) {
		spec->num_channels = ARRAY_SIZE(rf_vals_bg_2522);
		spec->channels = rf_vals_bg_2522;
	} else if (rt2x00_rf(&rt2x00dev->chip, RF2523)) {
		spec->num_channels = ARRAY_SIZE(rf_vals_bg_2523);
		spec->channels = rf_vals_bg_2523;
	} else if (rt2x00_rf(&rt2x00dev->chip, RF2524)) {
		spec->num_channels = ARRAY_SIZE(rf_vals_bg_2524);
		spec->channels = rf_vals_bg_2524;
	} else if (rt2x00_rf(&rt2x00dev->chip, RF2525)) {
		spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525);
		spec->channels = rf_vals_bg_2525;
	} else if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
		spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525e);
		spec->channels = rf_vals_bg_2525e;
	} else if (rt2x00_rf(&rt2x00dev->chip, RF5222)) {
		spec->supported_bands |= SUPPORT_BAND_5GHZ;
		spec->num_channels = ARRAY_SIZE(rf_vals_5222);
		spec->channels = rf_vals_5222;
	}
}

static int rt2500pci_probe_hw(struct rt2x00_dev *rt2x00dev)
{
	int retval;

	/*
	 * Allocate eeprom data.
	 */
	retval = rt2500pci_validate_eeprom(rt2x00dev);
	if (retval)
		return retval;

	retval = rt2500pci_init_eeprom(rt2x00dev);
	if (retval)
		return retval;

	/*
	 * Initialize hw specifications.
	 */
	rt2500pci_probe_hw_mode(rt2x00dev);

	/*
	 * This device requires the atim queue
	 */
	__set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);

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

	return 0;
}

/*
 * IEEE80211 stack callback functions.
 */
static void rt2500pci_configure_filter(struct ieee80211_hw *hw,
				       unsigned int changed_flags,
				       unsigned int *total_flags,
				       int mc_count,
				       struct dev_addr_list *mc_list)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	u32 reg;

	/*
	 * Mask off any flags we are going to ignore from
	 * the total_flags field.
	 */
	*total_flags &=
	    FIF_ALLMULTI |
	    FIF_FCSFAIL |
	    FIF_PLCPFAIL |
	    FIF_CONTROL |
	    FIF_OTHER_BSS |
	    FIF_PROMISC_IN_BSS;

	/*
	 * Apply some rules to the filters:
	 * - Some filters imply different filters to be set.
	 * - Some things we can't filter out at all.
	 */
	if (mc_count)
		*total_flags |= FIF_ALLMULTI;
	if (*total_flags & FIF_OTHER_BSS ||
	    *total_flags & FIF_PROMISC_IN_BSS)
		*total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;

	/*
	 * Check if there is any work left for us.
	 */
	if (rt2x00dev->packet_filter == *total_flags)
		return;
	rt2x00dev->packet_filter = *total_flags;

	/*
	 * 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.
	 */
	rt2x00pci_register_read(rt2x00dev, RXCSR0, &reg);
	rt2x00_set_field32(&reg, RXCSR0_DROP_CRC,
			   !(*total_flags & FIF_FCSFAIL));
	rt2x00_set_field32(&reg, RXCSR0_DROP_PHYSICAL,
			   !(*total_flags & FIF_PLCPFAIL));
	rt2x00_set_field32(&reg, RXCSR0_DROP_CONTROL,
			   !(*total_flags & FIF_CONTROL));
	rt2x00_set_field32(&reg, RXCSR0_DROP_NOT_TO_ME,
			   !(*total_flags & FIF_PROMISC_IN_BSS));
	rt2x00_set_field32(&reg, RXCSR0_DROP_TODS,
			   !(*total_flags & FIF_PROMISC_IN_BSS));
	rt2x00_set_field32(&reg, RXCSR0_DROP_VERSION_ERROR, 1);
	rt2x00_set_field32(&reg, RXCSR0_DROP_MCAST,
			   !(*total_flags & FIF_ALLMULTI));
	rt2x00_set_field32(&reg, RXCSR0_DROP_BCAST, 0);
	rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
}

static int rt2500pci_set_retry_limit(struct ieee80211_hw *hw,
				     u32 short_retry, u32 long_retry)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, CSR11, &reg);
	rt2x00_set_field32(&reg, CSR11_LONG_RETRY, long_retry);
	rt2x00_set_field32(&reg, CSR11_SHORT_RETRY, short_retry);
	rt2x00pci_register_write(rt2x00dev, CSR11, reg);

	return 0;
}

static u64 rt2500pci_get_tsf(struct ieee80211_hw *hw)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	u64 tsf;
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, CSR17, &reg);
	tsf = (u64) rt2x00_get_field32(reg, CSR17_HIGH_TSFTIMER) << 32;
	rt2x00pci_register_read(rt2x00dev, CSR16, &reg);
	tsf |= rt2x00_get_field32(reg, CSR16_LOW_TSFTIMER);

	return tsf;
}

static int rt2500pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
				   struct ieee80211_tx_control *control)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	struct rt2x00_intf *intf = vif_to_intf(control->vif);
	struct queue_entry_priv_pci_tx *priv_tx;
	struct skb_frame_desc *skbdesc;
	u32 reg;

	if (unlikely(!intf->beacon))
		return -ENOBUFS;

	priv_tx = intf->beacon->priv_data;

	/*
	 * Fill in skb descriptor
	 */
	skbdesc = get_skb_frame_desc(skb);
	memset(skbdesc, 0, sizeof(*skbdesc));
	skbdesc->flags |= FRAME_DESC_DRIVER_GENERATED;
	skbdesc->data = skb->data;
	skbdesc->data_len = skb->len;
	skbdesc->desc = priv_tx->desc;
	skbdesc->desc_len = intf->beacon->queue->desc_size;
	skbdesc->entry = intf->beacon;

	/*
	 * Disable beaconing while we are reloading the beacon data,
	 * otherwise we might be sending out invalid data.
	 */
	rt2x00pci_register_read(rt2x00dev, CSR14, &reg);
	rt2x00_set_field32(&reg, CSR14_TSF_COUNT, 0);
	rt2x00_set_field32(&reg, CSR14_TBCN, 0);
	rt2x00_set_field32(&reg, CSR14_BEACON_GEN, 0);
	rt2x00pci_register_write(rt2x00dev, CSR14, reg);

	/*
	 * mac80211 doesn't provide the control->queue variable
	 * for beacons. Set our own queue identification so
	 * it can be used during descriptor initialization.
	 */
	control->queue = RT2X00_BCN_QUEUE_BEACON;
	rt2x00lib_write_tx_desc(rt2x00dev, skb, control);

	/*
	 * Enable beacon generation.
	 * Write entire beacon with descriptor to register,
	 * and kick the beacon generator.
	 */
	memcpy(priv_tx->data, skb->data, skb->len);
	rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);

	return 0;
}

static int rt2500pci_tx_last_beacon(struct ieee80211_hw *hw)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
	u32 reg;

	rt2x00pci_register_read(rt2x00dev, CSR15, &reg);
	return rt2x00_get_field32(reg, CSR15_BEACON_SENT);
}

static const struct ieee80211_ops rt2500pci_mac80211_ops = {
	.tx			= rt2x00mac_tx,
	.start			= rt2x00mac_start,
	.stop			= rt2x00mac_stop,
	.add_interface		= rt2x00mac_add_interface,
	.remove_interface	= rt2x00mac_remove_interface,
	.config			= rt2x00mac_config,
	.config_interface	= rt2x00mac_config_interface,
	.configure_filter	= rt2500pci_configure_filter,
	.get_stats		= rt2x00mac_get_stats,
	.set_retry_limit	= rt2500pci_set_retry_limit,
	.bss_info_changed	= rt2x00mac_bss_info_changed,
	.conf_tx		= rt2x00mac_conf_tx,
	.get_tx_stats		= rt2x00mac_get_tx_stats,
	.get_tsf		= rt2500pci_get_tsf,
	.beacon_update		= rt2500pci_beacon_update,
	.tx_last_beacon		= rt2500pci_tx_last_beacon,
};

static const struct rt2x00lib_ops rt2500pci_rt2x00_ops = {
	.irq_handler		= rt2500pci_interrupt,
	.probe_hw		= rt2500pci_probe_hw,
	.initialize		= rt2x00pci_initialize,
	.uninitialize		= rt2x00pci_uninitialize,
	.init_rxentry		= rt2500pci_init_rxentry,
	.init_txentry		= rt2500pci_init_txentry,
	.set_device_state	= rt2500pci_set_device_state,
	.rfkill_poll		= rt2500pci_rfkill_poll,
	.link_stats		= rt2500pci_link_stats,
	.reset_tuner		= rt2500pci_reset_tuner,
	.link_tuner		= rt2500pci_link_tuner,
	.led_brightness		= rt2500pci_led_brightness,
	.write_tx_desc		= rt2500pci_write_tx_desc,
	.write_tx_data		= rt2x00pci_write_tx_data,
	.kick_tx_queue		= rt2500pci_kick_tx_queue,
	.fill_rxdone		= rt2500pci_fill_rxdone,
	.config_intf		= rt2500pci_config_intf,
	.config_preamble	= rt2500pci_config_preamble,
	.config			= rt2500pci_config,
};

static const struct data_queue_desc rt2500pci_queue_rx = {
	.entry_num		= RX_ENTRIES,
	.data_size		= DATA_FRAME_SIZE,
	.desc_size		= RXD_DESC_SIZE,
	.priv_size		= sizeof(struct queue_entry_priv_pci_rx),
};

static const struct data_queue_desc rt2500pci_queue_tx = {
	.entry_num		= TX_ENTRIES,
	.data_size		= DATA_FRAME_SIZE,
	.desc_size		= TXD_DESC_SIZE,
	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),
};

static const struct data_queue_desc rt2500pci_queue_bcn = {
	.entry_num		= BEACON_ENTRIES,
	.data_size		= MGMT_FRAME_SIZE,
	.desc_size		= TXD_DESC_SIZE,
	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),
};

static const struct data_queue_desc rt2500pci_queue_atim = {
	.entry_num		= ATIM_ENTRIES,
	.data_size		= DATA_FRAME_SIZE,
	.desc_size		= TXD_DESC_SIZE,
	.priv_size		= sizeof(struct queue_entry_priv_pci_tx),
};

static const struct rt2x00_ops rt2500pci_ops = {
	.name		= KBUILD_MODNAME,
	.max_sta_intf	= 1,
	.max_ap_intf	= 1,
	.eeprom_size	= EEPROM_SIZE,
	.rf_size	= RF_SIZE,
	.rx		= &rt2500pci_queue_rx,
	.tx		= &rt2500pci_queue_tx,
	.bcn		= &rt2500pci_queue_bcn,
	.atim		= &rt2500pci_queue_atim,
	.lib		= &rt2500pci_rt2x00_ops,
	.hw		= &rt2500pci_mac80211_ops,
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
	.debugfs	= &rt2500pci_rt2x00debug,
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
};

/*
 * RT2500pci module information.
 */
static struct pci_device_id rt2500pci_device_table[] = {
	{ PCI_DEVICE(0x1814, 0x0201), PCI_DEVICE_DATA(&rt2500pci_ops) },
	{ 0, }
};

MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("Ralink RT2500 PCI & PCMCIA Wireless LAN driver.");
MODULE_SUPPORTED_DEVICE("Ralink RT2560 PCI & PCMCIA chipset based cards");
MODULE_DEVICE_TABLE(pci, rt2500pci_device_table);
MODULE_LICENSE("GPL");

static struct pci_driver rt2500pci_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= rt2500pci_device_table,
	.probe		= rt2x00pci_probe,
	.remove		= __devexit_p(rt2x00pci_remove),
	.suspend	= rt2x00pci_suspend,
	.resume		= rt2x00pci_resume,
};

static int __init rt2500pci_init(void)
{
	return pci_register_driver(&rt2500pci_driver);
}

static void __exit rt2500pci_exit(void)
{
	pci_unregister_driver(&rt2500pci_driver);
}

module_init(rt2500pci_init);
module_exit(rt2500pci_exit);