rt2500usb.c 60.2 KB
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/*
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	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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	<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: rt2500usb
	Abstract: rt2500usb device specific routines.
	Supported chipsets: RT2570.
 */

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

#include "rt2x00.h"
#include "rt2x00usb.h"
#include "rt2500usb.h"

/*
 * Register access.
 * All access to the CSR registers will go through the methods
 * rt2500usb_register_read and rt2500usb_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.
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 * If the usb_cache_mutex is already held then the _lock variants must
 * be used instead.
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 */
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static inline void rt2500usb_register_read(struct rt2x00_dev *rt2x00dev,
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					   const unsigned int offset,
					   u16 *value)
{
	__le16 reg;
	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
				      USB_VENDOR_REQUEST_IN, offset,
				      &reg, sizeof(u16), REGISTER_TIMEOUT);
	*value = le16_to_cpu(reg);
}

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static inline void rt2500usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
						const unsigned int offset,
						u16 *value)
{
	__le16 reg;
	rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
				       USB_VENDOR_REQUEST_IN, offset,
				       &reg, sizeof(u16), REGISTER_TIMEOUT);
	*value = le16_to_cpu(reg);
}

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static inline void rt2500usb_register_multiread(struct rt2x00_dev *rt2x00dev,
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						const unsigned int offset,
						void *value, const u16 length)
{
	int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
				      USB_VENDOR_REQUEST_IN, offset,
				      value, length, timeout);
}

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static inline void rt2500usb_register_write(struct rt2x00_dev *rt2x00dev,
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					    const unsigned int offset,
					    u16 value)
{
	__le16 reg = cpu_to_le16(value);
	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
				      USB_VENDOR_REQUEST_OUT, offset,
				      &reg, sizeof(u16), REGISTER_TIMEOUT);
}

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static inline void rt2500usb_register_write_lock(struct rt2x00_dev *rt2x00dev,
						 const unsigned int offset,
						 u16 value)
{
	__le16 reg = cpu_to_le16(value);
	rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE,
				       USB_VENDOR_REQUEST_OUT, offset,
				       &reg, sizeof(u16), REGISTER_TIMEOUT);
}

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static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
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						 const unsigned int offset,
						 void *value, const u16 length)
{
	int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
				      USB_VENDOR_REQUEST_OUT, offset,
				      value, length, timeout);
}

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static u16 rt2500usb_bbp_check(struct rt2x00_dev *rt2x00dev)
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{
	u16 reg;
	unsigned int i;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
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		rt2500usb_register_read_lock(rt2x00dev, PHY_CSR8, &reg);
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		if (!rt2x00_get_field16(reg, PHY_CSR8_BUSY))
			break;
		udelay(REGISTER_BUSY_DELAY);
	}

	return reg;
}

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static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev,
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				const unsigned int word, const u8 value)
{
	u16 reg;

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	mutex_lock(&rt2x00dev->usb_cache_mutex);

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	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500usb_bbp_check(rt2x00dev);
	if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
		ERROR(rt2x00dev, "PHY_CSR8 register busy. Write failed.\n");
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		mutex_unlock(&rt2x00dev->usb_cache_mutex);
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		return;
	}

	/*
	 * Write the data into the BBP.
	 */
	reg = 0;
	rt2x00_set_field16(&reg, PHY_CSR7_DATA, value);
	rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
	rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 0);

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	rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);

	mutex_unlock(&rt2x00dev->usb_cache_mutex);
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}

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static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev,
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			       const unsigned int word, u8 *value)
{
	u16 reg;

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	mutex_lock(&rt2x00dev->usb_cache_mutex);

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	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500usb_bbp_check(rt2x00dev);
	if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
		ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
		return;
	}

	/*
	 * Write the request into the BBP.
	 */
	reg = 0;
	rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
	rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 1);

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	rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);
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	/*
	 * Wait until the BBP becomes ready.
	 */
	reg = rt2500usb_bbp_check(rt2x00dev);
	if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
		ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
		*value = 0xff;
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		mutex_unlock(&rt2x00dev->usb_cache_mutex);
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		return;
	}

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	rt2500usb_register_read_lock(rt2x00dev, PHY_CSR7, &reg);
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	*value = rt2x00_get_field16(reg, PHY_CSR7_DATA);
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	mutex_unlock(&rt2x00dev->usb_cache_mutex);
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}

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static void rt2500usb_rf_write(struct rt2x00_dev *rt2x00dev,
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			       const unsigned int word, const u32 value)
{
	u16 reg;
	unsigned int i;

	if (!word)
		return;

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	mutex_lock(&rt2x00dev->usb_cache_mutex);

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	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
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		rt2500usb_register_read_lock(rt2x00dev, PHY_CSR10, &reg);
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		if (!rt2x00_get_field16(reg, PHY_CSR10_RF_BUSY))
			goto rf_write;
		udelay(REGISTER_BUSY_DELAY);
	}

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	mutex_unlock(&rt2x00dev->usb_cache_mutex);
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	ERROR(rt2x00dev, "PHY_CSR10 register busy. Write failed.\n");
	return;

rf_write:
	reg = 0;
	rt2x00_set_field16(&reg, PHY_CSR9_RF_VALUE, value);
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	rt2500usb_register_write_lock(rt2x00dev, PHY_CSR9, reg);
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	reg = 0;
	rt2x00_set_field16(&reg, PHY_CSR10_RF_VALUE, value >> 16);
	rt2x00_set_field16(&reg, PHY_CSR10_RF_NUMBER_OF_BITS, 20);
	rt2x00_set_field16(&reg, PHY_CSR10_RF_IF_SELECT, 0);
	rt2x00_set_field16(&reg, PHY_CSR10_RF_BUSY, 1);

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	rt2500usb_register_write_lock(rt2x00dev, PHY_CSR10, reg);
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	rt2x00_rf_write(rt2x00dev, word, value);
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	mutex_unlock(&rt2x00dev->usb_cache_mutex);
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}

#ifdef CONFIG_RT2X00_LIB_DEBUGFS
#define CSR_OFFSET(__word)	( CSR_REG_BASE + ((__word) * sizeof(u16)) )

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static void rt2500usb_read_csr(struct rt2x00_dev *rt2x00dev,
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			       const unsigned int word, u32 *data)
{
	rt2500usb_register_read(rt2x00dev, CSR_OFFSET(word), (u16 *) data);
}

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static void rt2500usb_write_csr(struct rt2x00_dev *rt2x00dev,
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				const unsigned int word, u32 data)
{
	rt2500usb_register_write(rt2x00dev, CSR_OFFSET(word), data);
}

static const struct rt2x00debug rt2500usb_rt2x00debug = {
	.owner	= THIS_MODULE,
	.csr	= {
		.read		= rt2500usb_read_csr,
		.write		= rt2500usb_write_csr,
		.word_size	= sizeof(u16),
		.word_count	= CSR_REG_SIZE / sizeof(u16),
	},
	.eeprom	= {
		.read		= rt2x00_eeprom_read,
		.write		= rt2x00_eeprom_write,
		.word_size	= sizeof(u16),
		.word_count	= EEPROM_SIZE / sizeof(u16),
	},
	.bbp	= {
		.read		= rt2500usb_bbp_read,
		.write		= rt2500usb_bbp_write,
		.word_size	= sizeof(u8),
		.word_count	= BBP_SIZE / sizeof(u8),
	},
	.rf	= {
		.read		= rt2x00_rf_read,
		.write		= rt2500usb_rf_write,
		.word_size	= sizeof(u32),
		.word_count	= RF_SIZE / sizeof(u32),
	},
};
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */

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#ifdef CONFIG_RT2500USB_LEDS
static void rt2500usb_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;

	if (led->type == LED_TYPE_RADIO || led->type == LED_TYPE_ASSOC) {
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		rt2x00_set_field16(&led->rt2x00dev->led_mcu_reg,
				   MAC_CSR20_LINK, enabled);
		rt2x00_set_field16(&led->rt2x00dev->led_mcu_reg,
				   MAC_CSR20_ACTIVITY, enabled && activity);
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	}

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	rt2x00usb_vendor_request_async(led->rt2x00dev, USB_SINGLE_WRITE,
				       MAC_CSR20, led->rt2x00dev->led_mcu_reg);
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}
#else
#define rt2500usb_led_brightness	NULL
#endif /* CONFIG_RT2500USB_LEDS */

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/*
 * Configuration handlers.
 */
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static void rt2500usb_config_intf(struct rt2x00_dev *rt2x00dev,
				  struct rt2x00_intf *intf,
				  struct rt2x00intf_conf *conf,
				  const unsigned int flags)
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{
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	unsigned int bcn_preload;
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	u16 reg;

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	if (flags & CONFIG_UPDATE_TYPE) {
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
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		/*
		 * Enable beacon config
		 */
		bcn_preload = PREAMBLE + get_duration(IEEE80211_HEADER, 20);
		rt2500usb_register_read(rt2x00dev, TXRX_CSR20, &reg);
		rt2x00_set_field16(&reg, TXRX_CSR20_OFFSET, bcn_preload >> 6);
		rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW,
				   2 * (conf->type != IEEE80211_IF_TYPE_STA));
		rt2500usb_register_write(rt2x00dev, TXRX_CSR20, reg);
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		/*
		 * Enable synchronisation.
		 */
		rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
		rt2x00_set_field16(&reg, TXRX_CSR18_OFFSET, 0);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);

		rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
		rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 1);
		rt2x00_set_field16(&reg, TXRX_CSR19_TBCN,
				   (conf->sync == TSF_SYNC_BEACON));
		rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 0);
		rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, conf->sync);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
	}
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	if (flags & CONFIG_UPDATE_MAC)
		rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, conf->mac,
					      (3 * sizeof(__le16)));

	if (flags & CONFIG_UPDATE_BSSID)
		rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, conf->bssid,
					      (3 * sizeof(__le16)));
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}

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static int rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
				     const int short_preamble,
				     const int ack_timeout,
				     const int ack_consume_time)
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{
	u16 reg;

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	/*
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	 * When in atomic context, we should let rt2x00lib
	 * try this configuration again later.
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	 */
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	if (in_atomic())
		return -EAGAIN;
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	rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
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	rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
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	rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
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	rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
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			   !!short_preamble);
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	rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
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	return 0;
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}

static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
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				     const int basic_rate_mask)
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{
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	rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
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}

static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
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				     struct rf_channel *rf, const int txpower)
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{
	/*
	 * Set TXpower.
	 */
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	rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
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	/*
	 * For RT2525E we should first set the channel to half band higher.
	 */
	if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
		static const u32 vals[] = {
			0x000008aa, 0x000008ae, 0x000008ae, 0x000008b2,
			0x000008b2, 0x000008b6, 0x000008b6, 0x000008ba,
			0x000008ba, 0x000008be, 0x000008b7, 0x00000902,
			0x00000902, 0x00000906
		};

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		rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
		if (rf->rf4)
			rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
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	}

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	rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
	rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
	rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
	if (rf->rf4)
		rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
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}

static void rt2500usb_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));
	rt2500usb_rf_write(rt2x00dev, 3, rf3);
}

static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
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				     struct antenna_setup *ant)
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{
	u8 r2;
	u8 r14;
	u16 csr5;
	u16 csr6;

	rt2500usb_bbp_read(rt2x00dev, 2, &r2);
	rt2500usb_bbp_read(rt2x00dev, 14, &r14);
	rt2500usb_register_read(rt2x00dev, PHY_CSR5, &csr5);
	rt2500usb_register_read(rt2x00dev, PHY_CSR6, &csr6);

	/*
	 * Configure the TX antenna.
	 */
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	switch (ant->tx) {
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	case ANTENNA_HW_DIVERSITY:
		rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 1);
		rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 1);
		rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 1);
		break;
	case ANTENNA_A:
		rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
		rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 0);
		rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 0);
		break;
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	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.
		 */
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	case ANTENNA_B:
		rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
		rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 2);
		rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 2);
		break;
	}

	/*
	 * Configure the RX antenna.
	 */
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	switch (ant->rx) {
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	case ANTENNA_HW_DIVERSITY:
		rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 1);
		break;
	case ANTENNA_A:
		rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
		break;
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	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.
		 */
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	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_field16(&csr5, PHY_CSR5_CCK_FLIP, 1);
		rt2x00_set_field16(&csr6, PHY_CSR6_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_field16(&csr5, PHY_CSR5_CCK_FLIP, 0);
		rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 0);
	}

	rt2500usb_bbp_write(rt2x00dev, 2, r2);
	rt2500usb_bbp_write(rt2x00dev, 14, r14);
	rt2500usb_register_write(rt2x00dev, PHY_CSR5, csr5);
	rt2500usb_register_write(rt2x00dev, PHY_CSR6, csr6);
}

static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
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				      struct rt2x00lib_conf *libconf)
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{
	u16 reg;

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	rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
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	rt2500usb_register_write(rt2x00dev, MAC_CSR11, libconf->sifs);
	rt2500usb_register_write(rt2x00dev, MAC_CSR12, libconf->eifs);
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	rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
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	rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
			   libconf->conf->beacon_int * 4);
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	rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
}

static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
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			     struct rt2x00lib_conf *libconf,
			     const unsigned int flags)
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{
	if (flags & CONFIG_UPDATE_PHYMODE)
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		rt2500usb_config_phymode(rt2x00dev, libconf->basic_rates);
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	if (flags & CONFIG_UPDATE_CHANNEL)
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		rt2500usb_config_channel(rt2x00dev, &libconf->rf,
					 libconf->conf->power_level);
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	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
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		rt2500usb_config_txpower(rt2x00dev,
					 libconf->conf->power_level);
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	if (flags & CONFIG_UPDATE_ANTENNA)
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		rt2500usb_config_antenna(rt2x00dev, &libconf->ant);
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	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
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		rt2500usb_config_duration(rt2x00dev, libconf);
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}

/*
 * Link tuning
 */
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static void rt2500usb_link_stats(struct rt2x00_dev *rt2x00dev,
				 struct link_qual *qual)
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{
	u16 reg;

	/*
	 * Update FCS error count from register.
	 */
	rt2500usb_register_read(rt2x00dev, STA_CSR0, &reg);
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	qual->rx_failed = rt2x00_get_field16(reg, STA_CSR0_FCS_ERROR);
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	/*
	 * Update False CCA count from register.
	 */
	rt2500usb_register_read(rt2x00dev, STA_CSR3, &reg);
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	qual->false_cca = rt2x00_get_field16(reg, STA_CSR3_FALSE_CCA_ERROR);
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}

static void rt2500usb_reset_tuner(struct rt2x00_dev *rt2x00dev)
{
	u16 eeprom;
	u16 value;

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &eeprom);
	value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R24_LOW);
	rt2500usb_bbp_write(rt2x00dev, 24, value);

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &eeprom);
	value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R25_LOW);
	rt2500usb_bbp_write(rt2x00dev, 25, value);

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &eeprom);
	value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R61_LOW);
	rt2500usb_bbp_write(rt2x00dev, 61, value);

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &eeprom);
	value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_VGCUPPER);
	rt2500usb_bbp_write(rt2x00dev, 17, value);

	rt2x00dev->link.vgc_level = value;
}

static void rt2500usb_link_tuner(struct rt2x00_dev *rt2x00dev)
{
	int rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
	u16 bbp_thresh;
	u16 vgc_bound;
	u16 sens;
	u16 r24;
	u16 r25;
	u16 r61;
	u16 r17_sens;
	u8 r17;
	u8 up_bound;
	u8 low_bound;

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	/*
	 * Read current r17 value, as well as the sensitivity values
	 * for the r17 register.
	 */
	rt2500usb_bbp_read(rt2x00dev, 17, &r17);
	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &r17_sens);

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &vgc_bound);
	up_bound = rt2x00_get_field16(vgc_bound, EEPROM_BBPTUNE_VGCUPPER);
	low_bound = rt2x00_get_field16(vgc_bound, EEPROM_BBPTUNE_VGCLOWER);

	/*
	 * If we are not associated, we should go straight to the
	 * dynamic CCA tuning.
	 */
	if (!rt2x00dev->intf_associated)
		goto dynamic_cca_tune;

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	/*
	 * Determine the BBP tuning threshold and correctly
	 * set BBP 24, 25 and 61.
	 */
	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &bbp_thresh);
	bbp_thresh = rt2x00_get_field16(bbp_thresh, EEPROM_BBPTUNE_THRESHOLD);

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &r24);
	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &r25);
	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &r61);

	if ((rssi + bbp_thresh) > 0) {
		r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_HIGH);
		r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_HIGH);
		r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_HIGH);
	} else {
		r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_LOW);
		r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_LOW);
		r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_LOW);
	}

	rt2500usb_bbp_write(rt2x00dev, 24, r24);
	rt2500usb_bbp_write(rt2x00dev, 25, r25);
	rt2500usb_bbp_write(rt2x00dev, 61, r61);

	/*
	 * 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 >= -40) {
		if (r17 != 0x60)
			rt2500usb_bbp_write(rt2x00dev, 17, 0x60);
		return;
	}

	/*
	 * Special big-R17 for short distance
	 */
	if (rssi >= -58) {
		sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_LOW);
		if (r17 != sens)
			rt2500usb_bbp_write(rt2x00dev, 17, sens);
		return;
	}

	/*
	 * Special mid-R17 for middle distance
	 */
	if (rssi >= -74) {
		sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_HIGH);
		if (r17 != sens)
			rt2500usb_bbp_write(rt2x00dev, 17, sens);
		return;
	}

	/*
	 * Leave short or middle distance condition, restore r17
	 * to the dynamic tuning range.
	 */
	low_bound = 0x32;
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	if (rssi < -77)
		up_bound -= (-77 - rssi);
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	if (up_bound < low_bound)
		up_bound = low_bound;

	if (r17 > up_bound) {
		rt2500usb_bbp_write(rt2x00dev, 17, up_bound);
		rt2x00dev->link.vgc_level = up_bound;
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		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 < up_bound) {
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		rt2500usb_bbp_write(rt2x00dev, 17, ++r17);
		rt2x00dev->link.vgc_level = r17;
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	} else if (rt2x00dev->link.qual.false_cca < 100 && r17 > low_bound) {
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		rt2500usb_bbp_write(rt2x00dev, 17, --r17);
		rt2x00dev->link.vgc_level = r17;
	}
}

/*
 * Initialization functions.
 */
static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
{
	u16 reg;

	rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE, 0x0001,
				    USB_MODE_TEST, REGISTER_TIMEOUT);
	rt2x00usb_vendor_request_sw(rt2x00dev, USB_SINGLE_WRITE, 0x0308,
				    0x00f0, REGISTER_TIMEOUT);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX, 1);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);

	rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x1111);
	rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x1e11);

	rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
	rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 1);
	rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 1);
	rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
	rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);

	rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
	rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
	rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
	rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
	rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);

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	rt2500usb_register_read(rt2x00dev, MAC_CSR21, &reg);
	rt2x00_set_field16(&reg, MAC_CSR21_ON_PERIOD, 70);
	rt2x00_set_field16(&reg, MAC_CSR21_OFF_PERIOD, 30);
	rt2500usb_register_write(rt2x00dev, MAC_CSR21, reg);

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	rt2500usb_register_read(rt2x00dev, TXRX_CSR5, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0, 13);
	rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0_VALID, 1);
	rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1, 12);
	rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1_VALID, 1);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR5, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR6, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0, 10);
	rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0_VALID, 1);
	rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1, 11);
	rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1_VALID, 1);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR6, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR7, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0, 7);
	rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0_VALID, 1);
	rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1, 6);
	rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1_VALID, 1);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR7, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR8, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0, 5);
	rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0_VALID, 1);
	rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1, 0);
	rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1_VALID, 0);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR8, reg);

	rt2500usb_register_write(rt2x00dev, TXRX_CSR21, 0xe78f);
	rt2500usb_register_write(rt2x00dev, MAC_CSR9, 0xff1d);

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

	rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
	rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
	rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
	rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 1);
	rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);

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	if (rt2x00_rev(&rt2x00dev->chip) >= RT2570_VERSION_C) {
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		rt2500usb_register_read(rt2x00dev, PHY_CSR2, &reg);
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		rt2x00_set_field16(&reg, PHY_CSR2_LNA, 0);
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	} else {
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		reg = 0;
		rt2x00_set_field16(&reg, PHY_CSR2_LNA, 1);
		rt2x00_set_field16(&reg, PHY_CSR2_LNA_MODE, 3);
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	}
	rt2500usb_register_write(rt2x00dev, PHY_CSR2, reg);

	rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0002);
	rt2500usb_register_write(rt2x00dev, MAC_CSR22, 0x0053);
	rt2500usb_register_write(rt2x00dev, MAC_CSR15, 0x01ee);
	rt2500usb_register_write(rt2x00dev, MAC_CSR16, 0x0000);

	rt2500usb_register_read(rt2x00dev, MAC_CSR8, &reg);
	rt2x00_set_field16(&reg, MAC_CSR8_MAX_FRAME_UNIT,
			   rt2x00dev->rx->data_size);
	rt2500usb_register_write(rt2x00dev, MAC_CSR8, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
	rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0xff);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);

	rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
	rt2x00_set_field16(&reg, MAC_CSR18_DELAY_AFTER_BEACON, 90);
	rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);

	rt2500usb_register_read(rt2x00dev, PHY_CSR4, &reg);
	rt2x00_set_field16(&reg, PHY_CSR4_LOW_RF_LE, 1);
	rt2500usb_register_write(rt2x00dev, PHY_CSR4, reg);

	rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR1_AUTO_SEQUENCE, 1);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);

	return 0;
}

static int rt2500usb_init_bbp(struct rt2x00_dev *rt2x00dev)
{
	unsigned int i;
	u16 eeprom;
	u8 value;
	u8 reg_id;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2500usb_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:
	rt2500usb_bbp_write(rt2x00dev, 3, 0x02);
	rt2500usb_bbp_write(rt2x00dev, 4, 0x19);
	rt2500usb_bbp_write(rt2x00dev, 14, 0x1c);
	rt2500usb_bbp_write(rt2x00dev, 15, 0x30);
	rt2500usb_bbp_write(rt2x00dev, 16, 0xac);
	rt2500usb_bbp_write(rt2x00dev, 18, 0x18);
	rt2500usb_bbp_write(rt2x00dev, 19, 0xff);
	rt2500usb_bbp_write(rt2x00dev, 20, 0x1e);
	rt2500usb_bbp_write(rt2x00dev, 21, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 22, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 23, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 24, 0x80);
	rt2500usb_bbp_write(rt2x00dev, 25, 0x50);
	rt2500usb_bbp_write(rt2x00dev, 26, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 27, 0x23);
	rt2500usb_bbp_write(rt2x00dev, 30, 0x10);
	rt2500usb_bbp_write(rt2x00dev, 31, 0x2b);
	rt2500usb_bbp_write(rt2x00dev, 32, 0xb9);
	rt2500usb_bbp_write(rt2x00dev, 34, 0x12);
	rt2500usb_bbp_write(rt2x00dev, 35, 0x50);
	rt2500usb_bbp_write(rt2x00dev, 39, 0xc4);
	rt2500usb_bbp_write(rt2x00dev, 40, 0x02);
	rt2500usb_bbp_write(rt2x00dev, 41, 0x60);
	rt2500usb_bbp_write(rt2x00dev, 53, 0x10);
	rt2500usb_bbp_write(rt2x00dev, 54, 0x18);
	rt2500usb_bbp_write(rt2x00dev, 56, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 57, 0x10);
	rt2500usb_bbp_write(rt2x00dev, 58, 0x08);
	rt2500usb_bbp_write(rt2x00dev, 61, 0x60);
	rt2500usb_bbp_write(rt2x00dev, 62, 0x10);
	rt2500usb_bbp_write(rt2x00dev, 75, 0xff);

	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);
			rt2500usb_bbp_write(rt2x00dev, reg_id, value);
		}
	}

	return 0;
}

/*
 * Device state switch handlers.
 */
static void rt2500usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
				enum dev_state state)
{
	u16 reg;

	rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX,
			   state == STATE_RADIO_RX_OFF);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
}

static int rt2500usb_enable_radio(struct rt2x00_dev *rt2x00dev)
{
	/*
	 * Initialize all registers.
	 */
	if (rt2500usb_init_registers(rt2x00dev) ||
	    rt2500usb_init_bbp(rt2x00dev)) {
		ERROR(rt2x00dev, "Register initialization failed.\n");
		return -EIO;
	}

	return 0;
}

static void rt2500usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
	rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x2121);
	rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x2121);

	/*
	 * Disable synchronisation.
	 */
	rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);

	rt2x00usb_disable_radio(rt2x00dev);
}

static int rt2500usb_set_state(struct rt2x00_dev *rt2x00dev,
			       enum dev_state state)
{
	u16 reg;
	u16 reg2;
	unsigned int i;
	char put_to_sleep;
	char bbp_state;
	char rf_state;

	put_to_sleep = (state != STATE_AWAKE);

	reg = 0;
	rt2x00_set_field16(&reg, MAC_CSR17_BBP_DESIRE_STATE, state);
	rt2x00_set_field16(&reg, MAC_CSR17_RF_DESIRE_STATE, state);
	rt2x00_set_field16(&reg, MAC_CSR17_PUT_TO_SLEEP, put_to_sleep);
	rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
	rt2x00_set_field16(&reg, MAC_CSR17_SET_STATE, 1);
	rt2500usb_register_write(rt2x00dev, MAC_CSR17, 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++) {
		rt2500usb_register_read(rt2x00dev, MAC_CSR17, &reg2);
		bbp_state = rt2x00_get_field16(reg2, MAC_CSR17_BBP_CURR_STATE);
		rf_state = rt2x00_get_field16(reg2, MAC_CSR17_RF_CURR_STATE);
		if (bbp_state == state && rf_state == state)
			return 0;
		rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
		msleep(30);
	}

	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 rt2500usb_set_device_state(struct rt2x00_dev *rt2x00dev,
				      enum dev_state state)
{
	int retval = 0;

	switch (state) {
	case STATE_RADIO_ON:
		retval = rt2500usb_enable_radio(rt2x00dev);
		break;
	case STATE_RADIO_OFF:
		rt2500usb_disable_radio(rt2x00dev);
		break;
	case STATE_RADIO_RX_ON:
993
994
995
	case STATE_RADIO_RX_ON_LINK:
		rt2500usb_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
		break;
996
	case STATE_RADIO_RX_OFF:
997
998
	case STATE_RADIO_RX_OFF_LINK:
		rt2500usb_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
		break;
	case STATE_DEEP_SLEEP:
	case STATE_SLEEP:
	case STATE_STANDBY:
	case STATE_AWAKE:
		retval = rt2500usb_set_state(rt2x00dev, state);
		break;
	default:
		retval = -ENOTSUPP;
		break;
	}

	return retval;
}

/*
 * TX descriptor initialization
 */
static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
1018
				    struct sk_buff *skb,
1019
				    struct txentry_desc *txdesc,
1020
1021
				    struct ieee80211_tx_control *control)
{
1022
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
1023
	__le32 *txd = skbdesc->desc;
1024
1025
1026
1027
1028
1029
1030
	u32 word;

	/*
	 * Start writing the descriptor words.
	 */
	rt2x00_desc_read(txd, 1, &word);
	rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
1031
1032
1033
	rt2x00_set_field32(&word, TXD_W1_AIFS, txdesc->aifs);
	rt2x00_set_field32(&word, TXD_W1_CWMIN, txdesc->cw_min);
	rt2x00_set_field32(&word, TXD_W1_CWMAX, txdesc->cw_max);
1034
1035
1036
	rt2x00_desc_write(txd, 1, word);

	rt2x00_desc_read(txd, 2, &word);
1037
1038
1039
1040
	rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, txdesc->signal);
	rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, txdesc->service);
	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, txdesc->length_low);
	rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, txdesc->length_high);
1041
1042
1043
1044
1045
	rt2x00_desc_write(txd, 2, word);

	rt2x00_desc_read(txd, 0, &word);
	rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, control->retry_limit);
	rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
1046
			   test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
1047
	rt2x00_set_field32(&word, TXD_W0_ACK,
1048
			   test_bit(ENTRY_TXD_ACK, &txdesc->flags));
1049
	rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
1050
			   test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));
1051
	rt2x00_set_field32(&word, TXD_W0_OFDM,
1052
			   test_bit(ENTRY_TXD_OFDM_RATE, &txdesc->flags));
1053
1054
	rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
			   !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));
1055
	rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->ifs);
1056
	rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
1057
1058
1059
1060
	rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
	rt2x00_desc_write(txd, 0, word);
}

1061
static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
1062
				     struct sk_buff *skb)
1063
1064
1065
1066
1067
1068
1069
1070
{
	int length;

	/*
	 * The length _must_ be a multiple of 2,
	 * but it must _not_ be a multiple of the USB packet size.
	 */
	length = roundup(skb->len, 2);
1071
	length += (2 * !(length % rt2x00dev->usb_maxpacket));
1072
1073
1074
1075

	return length;
}

1076
1077
1078
1079
/*
 * TX data initialization
 */
static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
1080
				    const unsigned int queue)
1081
1082
1083
{
	u16 reg;

1084
	if (queue != RT2X00_BCN_QUEUE_BEACON)
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
		return;

	rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
	if (!rt2x00_get_field16(reg, TXRX_CSR19_BEACON_GEN)) {
		rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 1);
		/*
		 * Beacon generation will fail initially.
		 * To prevent this we need to register the TXRX_CSR19
		 * register several times.
		 */
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
		rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
	}
}

/*
 * RX control handlers
 */
1106
1107
static void rt2500usb_fill_rxdone(struct queue_entry *entry,
				  struct rxdone_entry_desc *rxdesc)
1108
{
1109
1110
1111
1112
1113
1114
1115
	struct queue_entry_priv_usb_rx *priv_rx = entry->priv_data;
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
	__le32 *rxd =
	    (__le32 *)(entry->skb->data +
		       (priv_rx->urb->actual_length - entry->queue->desc_size));
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data;
	int header_size = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
1116
1117
1118
1119
1120
1121
	u32 word0;
	u32 word1;

	rt2x00_desc_read(rxd, 0, &word0);
	rt2x00_desc_read(rxd, 1, &word1);

1122
	rxdesc->flags = 0;
1123
	if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
1124
		rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
1125
	if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
1126
		rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;
1127
1128
1129
1130

	/*
	 * Obtain the status about this packet.
	 */
1131
1132
1133
1134
1135
1136
	rxdesc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
	rxdesc->rssi = rt2x00_get_field32(word1, RXD_W1_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);
1137
1138

	/*
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
	 * The data behind the ieee80211 header must be
	 * aligned on a 4 byte boundary.
	 */
	if (header_size % 4 == 0) {
		skb_push(entry->skb, 2);
		memmove(entry->skb->data, entry->skb->data + 2,
			entry->skb->len - 2);
	}

	/*
	 * Set descriptor pointer.
1150
1151
	 */
	skbdesc->data = entry->skb->data;
1152
	skbdesc->data_len = rxdesc->size;
1153
1154
1155
1156
1157
1158
1159
1160
	skbdesc->desc = entry->skb->data + rxdesc->size;
	skbdesc->desc_len = entry->queue->desc_size;

	/*
	 * Remove descriptor from skb buffer and trim the whole thing
	 * down to only contain data.
	 */
	skb_trim(entry->skb, rxdesc->size);
1161
1162
1163
1164
1165
1166
1167
}

/*
 * Interrupt functions.
 */
static void rt2500usb_beacondone(struct urb *urb)
{
1168
1169
	struct queue_entry *entry = (struct queue_entry *)urb->context;
	struct queue_entry_priv_usb_bcn *priv_bcn = entry->priv_data;
1170

1171
	if (!test_bit(DEVICE_ENABLED_RADIO, &entry->queue->rt2x00dev->flags))
1172
1173
1174
1175
1176
1177
1178
1179
		return;

	/*
	 * Check if this was the guardian beacon,
	 * if that was the case we need to send the real beacon now.
	 * Otherwise we should free the sk_buffer, the device
	 * should be doing the rest of the work now.
	 */
1180
1181
1182
1183
1184
	if (priv_bcn->guardian_urb == urb) {
		usb_submit_urb(priv_bcn->urb, GFP_ATOMIC);
	} else if (priv_bcn->urb == urb) {
		dev_kfree_skb(entry->skb);
		entry->skb = NULL;
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
	}
}

/*
 * Device probe functions.
 */
static int rt2500usb_validate_eeprom(struct rt2x00_dev *rt2x00dev)
{
	u16 word;
	u8 *mac;
1195
	u8 bbp;
1196
1197
1198
1199
1200
1201
1202
1203

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

	/*
	 * Start validation of the data that has been read.
	 */
	mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
	if (!is_valid_ether_addr(mac)) {
1204
1205
		DECLARE_MAC_BUF(macbuf);

1206
		random_ether_addr(mac);
1207
		EEPROM(rt2x00dev, "MAC: %s\n", print_mac(macbuf, mac));
1208
1209
1210
1211
1212
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
1213
1214
1215
1216
1217
1218
		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);
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
		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);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_THRESHOLD, 45);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE, word);
		EEPROM(rt2x00dev, "BBPtune: 0x%04x\n", word);
	}

1250
1251
1252
1253
1254
1255
1256
	/*
	 * Switch lower vgc bound to current BBP R17 value,
	 * lower the value a bit for better quality.
	 */
	rt2500usb_bbp_read(rt2x00dev, 17, &bbp);
	bbp -= 6;

1257
1258
1259
	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCUPPER, 0x40);
1260
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCLOWER, bbp);
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_VGC, word);
		EEPROM(rt2x00dev, "BBPtune vgc: 0x%04x\n", word);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_LOW, 0x48);
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_HIGH, 0x41);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R17, word);
		EEPROM(rt2x00dev, "BBPtune r17: 0x%04x\n", word);
1271
1272
1273
	} else {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCLOWER, bbp);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_VGC, word);
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_LOW, 0x40);
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_HIGH, 0x80);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R24, word);
		EEPROM(rt2x00dev, "BBPtune r24: 0x%04x\n", word);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_LOW, 0x40);
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_HIGH, 0x50);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R25, word);
		EEPROM(rt2x00dev, "BBPtune r25: 0x%04x\n", word);
	}

	rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &word);
	if (word == 0xffff) {
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_LOW, 0x60);
		rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_HIGH, 0x6d);
		rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R61, word);
		EEPROM(rt2x00dev, "BBPtune r61: 0x%04x\n", word);
	}

	return 0;
}

static int rt2500usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
{
	u16 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);
	rt2500usb_register_read(rt2x00dev, MAC_CSR0, &reg);
	rt2x00_set_chip(rt2x00dev, RT2570, value, reg);

1321
	if (!rt2x00_check_rev(&rt2x00dev->chip, 0)) {
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
		ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
		return -ENODEV;
	}

	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.
	 */
1339
	rt2x00dev->default_ant.tx =
1340
	    rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TX_DEFAULT);
1341
	rt2x00dev->default_ant.rx =
1342
1343
	    rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_DEFAULT);

1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
	/*
	 * When the eeprom indicates SW_DIVERSITY use HW_DIVERSITY instead.
	 * I am not 100% sure about this, but the legacy drivers do not
	 * indicate antenna swapping in software is required when
	 * diversity is enabled.
	 */
	if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
		rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY;
	if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
		rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY;

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	/*
	 * Store led mode, for correct led behaviour.
	 */
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#ifdef CONFIG_RT2500USB_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;
	}
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	/*
	 * Store the current led register value, we need it later
	 * in set_brightness but that is called in irq context which
	 * means we can't use rt2500usb_register_read() at that time.
	 */
	rt2500usb_register_read(rt2x00dev, MAC_CSR20, &rt2x00dev->led_mcu_reg);
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#endif /* CONFIG_RT2500USB_LEDS */
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	/*
	 * Check if the BBP tuning should be disabled.
	 */
	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,  0x00022010, 0x0000089a, 0x00060111, 0x00000e1b },
	{ 2,  0x00022010, 0x0000089e, 0x00060111, 0x00000e07 },
	{ 3,  0x00022010, 0x0000089e, 0x00060111, 0x00000e1b },
	{ 4,  0x00022010, 0x000008a2, 0x00060111, 0x00000e07 },
	{ 5,  0x00022010, 0x000008a2, 0x00060111, 0x00000e1b },
	{ 6,  0x00022010, 0x000008a6, 0x00060111, 0x00000e07 },
	{ 7,  0x00022010, 0x000008a6, 0x00060111, 0x00000e1b },
	{ 8,  0x00022010, 0x000008aa, 0x00060111, 0x00000e07 },
	{ 9,  0x00022010, 0x000008aa, 0x00060111, 0x00000e1b },
	{ 10, 0x00022010, 0x000008ae, 0x00060111, 0x00000e07 },
	{ 11, 0x00022010, 0x000008ae, 0x00060111, 0x00000e1b },
	{ 12, 0x00022010, 0x000008b2, 0x00060111, 0x00000e07 },
	{ 13, 0x00022010, 0x000008b2, 0x00060111, 0x00000e1b },
	{ 14, 0x00022010, 0x000008b6, 0x00060111, 0x00000e23 },
};

/*
 * 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 rt2500usb_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_GEN_BEACON_TEMPLATE |
	    IEEE80211_HW_RX_INCLUDES_FCS |
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	    IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
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	rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE;
	rt2x00dev->hw->max_signal = MAX_SIGNAL;
	rt2x00dev->hw->max_rssi = MAX_RX_SSI;
	rt2x00dev->hw->queues = 2;

	SET_IEEE80211_DEV(rt2x00dev->hw, &rt2x00dev_usb(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->num_modes = 2;
	spec->num_rates = 12;
	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->num_channels = ARRAY_SIZE(rf_vals_5222);
		spec->channels = rf_vals_5222;
		spec->num_modes = 3;
	}
}

static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
{
	int retval;

	/*
	 * Allocate eeprom data.
	 */
	retval = rt2500usb_validate_eeprom(rt2x00dev);
	if (retval)
		return retval;

	retval = rt2500usb_init_eeprom(rt2x00dev);
	if (retval)
		return retval;

	/*
	 * Initialize hw specifications.
	 */
	rt2500usb_probe_hw_mode(rt2x00dev);

	/*
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	 * This device requires the atim queue
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	 */
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	__set_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);
	__set_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags);
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	/*
	 * Set the rssi offset.
	 */
	rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;

	return 0;
}

/*
 * IEEE80211 stack callback functions.
 */
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static void rt2500usb_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;
	u16 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;
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	if (*total_flags & FIF_OTHER_BSS ||
	    *total_flags & FIF_PROMISC_IN_BSS)
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		*total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;

	/*
	 * Check if there is any work left for us.
	 */
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	if (rt2x00dev->packet_filter == *total_flags)
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		return;
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	rt2x00dev->packet_filter = *total_flags;
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	/*
	 * When in atomic context, reschedule and let rt2x00lib
	 * call this function again.
	 */
	if (in_atomic()) {
		queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->filter_work);
		return;
	}

	/*
	 * 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.
	 */
	rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CRC,
			   !(*total_flags & FIF_FCSFAIL));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_PHYSICAL,
			   !(*total_flags & FIF_PLCPFAIL));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CONTROL,
			   !(*total_flags & FIF_CONTROL));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_NOT_TO_ME,
			   !(*total_flags & FIF_PROMISC_IN_BSS));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_TODS,
			   !(*total_flags & FIF_PROMISC_IN_BSS));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_VERSION_ERROR, 1);
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_MULTICAST,
			   !(*total_flags & FIF_ALLMULTI));
	rt2x00_set_field16(&reg, TXRX_CSR2_DROP_BROADCAST, 0);
	rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
}

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static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
				   struct sk_buff *skb,
				   struct ieee80211_tx_control *control)
{
	struct rt2x00_dev *rt2x00dev = hw->priv;
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	struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev);