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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Abstract: rt2400pci device specific routines.
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Supported chipsets: RT2460.
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#include <linux/delay.h>
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#include <linux/etherdevice.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/eeprom_93cx6.h>
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#include <linux/slab.h>
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#include "rt2x00pci.h"
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#include "rt2400pci.h"
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* All access to the CSR registers will go through the methods
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* rt2x00pci_register_read and rt2x00pci_register_write.
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* BBP and RF register require indirect register access,
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* and use the CSR registers BBPCSR and RFCSR to achieve this.
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* These indirect registers work with busy bits,
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* and we will try maximal REGISTER_BUSY_COUNT times to access
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* the register while taking a REGISTER_BUSY_DELAY us delay
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* between each attempt. When the busy bit is still set at that time,
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* the access attempt is considered to have failed,
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* and we will print an error.
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#define WAIT_FOR_BBP(__dev, __reg) \
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rt2x00pci_regbusy_read((__dev), BBPCSR, BBPCSR_BUSY, (__reg))
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#define WAIT_FOR_RF(__dev, __reg) \
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rt2x00pci_regbusy_read((__dev), RFCSR, RFCSR_BUSY, (__reg))
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static void rt2400pci_bbp_write(struct rt2x00_dev *rt2x00dev,
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const unsigned int word, const u8 value)
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mutex_lock(&rt2x00dev->csr_mutex);
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* Wait until the BBP becomes available, afterwards we
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* can safely write the new data into the register.
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if (WAIT_FOR_BBP(rt2x00dev, ®)) {
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rt2x00_set_field32(®, BBPCSR_VALUE, value);
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rt2x00_set_field32(®, BBPCSR_REGNUM, word);
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rt2x00_set_field32(®, BBPCSR_BUSY, 1);
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rt2x00_set_field32(®, BBPCSR_WRITE_CONTROL, 1);
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rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);
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mutex_unlock(&rt2x00dev->csr_mutex);
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static void rt2400pci_bbp_read(struct rt2x00_dev *rt2x00dev,
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const unsigned int word, u8 *value)
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mutex_lock(&rt2x00dev->csr_mutex);
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* Wait until the BBP becomes available, afterwards we
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* can safely write the read request into the register.
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* After the data has been written, we wait until hardware
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* returns the correct value, if at any time the register
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* doesn't become available in time, reg will be 0xffffffff
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* which means we return 0xff to the caller.
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if (WAIT_FOR_BBP(rt2x00dev, ®)) {
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rt2x00_set_field32(®, BBPCSR_REGNUM, word);
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rt2x00_set_field32(®, BBPCSR_BUSY, 1);
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rt2x00_set_field32(®, BBPCSR_WRITE_CONTROL, 0);
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rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);
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WAIT_FOR_BBP(rt2x00dev, ®);
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*value = rt2x00_get_field32(reg, BBPCSR_VALUE);
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mutex_unlock(&rt2x00dev->csr_mutex);
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static void rt2400pci_rf_write(struct rt2x00_dev *rt2x00dev,
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const unsigned int word, const u32 value)
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mutex_lock(&rt2x00dev->csr_mutex);
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* Wait until the RF becomes available, afterwards we
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* can safely write the new data into the register.
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if (WAIT_FOR_RF(rt2x00dev, ®)) {
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rt2x00_set_field32(®, RFCSR_VALUE, value);
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rt2x00_set_field32(®, RFCSR_NUMBER_OF_BITS, 20);
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rt2x00_set_field32(®, RFCSR_IF_SELECT, 0);
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rt2x00_set_field32(®, RFCSR_BUSY, 1);
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rt2x00pci_register_write(rt2x00dev, RFCSR, reg);
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rt2x00_rf_write(rt2x00dev, word, value);
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mutex_unlock(&rt2x00dev->csr_mutex);
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static void rt2400pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
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struct rt2x00_dev *rt2x00dev = eeprom->data;
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rt2x00pci_register_read(rt2x00dev, CSR21, ®);
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eeprom->reg_data_in = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_IN);
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eeprom->reg_data_out = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_OUT);
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eeprom->reg_data_clock =
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!!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_CLOCK);
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eeprom->reg_chip_select =
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!!rt2x00_get_field32(reg, CSR21_EEPROM_CHIP_SELECT);
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static void rt2400pci_eepromregister_write(struct eeprom_93cx6 *eeprom)
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struct rt2x00_dev *rt2x00dev = eeprom->data;
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rt2x00_set_field32(®, CSR21_EEPROM_DATA_IN, !!eeprom->reg_data_in);
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rt2x00_set_field32(®, CSR21_EEPROM_DATA_OUT, !!eeprom->reg_data_out);
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rt2x00_set_field32(®, CSR21_EEPROM_DATA_CLOCK,
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!!eeprom->reg_data_clock);
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rt2x00_set_field32(®, CSR21_EEPROM_CHIP_SELECT,
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!!eeprom->reg_chip_select);
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rt2x00pci_register_write(rt2x00dev, CSR21, reg);
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#ifdef CONFIG_RT2X00_LIB_DEBUGFS
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static const struct rt2x00debug rt2400pci_rt2x00debug = {
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.owner = THIS_MODULE,
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.read = rt2x00pci_register_read,
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.write = rt2x00pci_register_write,
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.flags = RT2X00DEBUGFS_OFFSET,
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.word_base = CSR_REG_BASE,
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.word_size = sizeof(u32),
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.word_count = CSR_REG_SIZE / sizeof(u32),
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.read = rt2x00_eeprom_read,
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.write = rt2x00_eeprom_write,
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.word_base = EEPROM_BASE,
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.word_size = sizeof(u16),
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.word_count = EEPROM_SIZE / sizeof(u16),
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.read = rt2400pci_bbp_read,
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.write = rt2400pci_bbp_write,
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.word_base = BBP_BASE,
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.word_size = sizeof(u8),
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.word_count = BBP_SIZE / sizeof(u8),
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.read = rt2x00_rf_read,
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.write = rt2400pci_rf_write,
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.word_base = RF_BASE,
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.word_size = sizeof(u32),
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.word_count = RF_SIZE / sizeof(u32),
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#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
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static int rt2400pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
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rt2x00pci_register_read(rt2x00dev, GPIOCSR, ®);
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return rt2x00_get_field32(reg, GPIOCSR_BIT0);
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#ifdef CONFIG_RT2X00_LIB_LEDS
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static void rt2400pci_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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struct rt2x00_led *led =
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container_of(led_cdev, struct rt2x00_led, led_dev);
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unsigned int enabled = brightness != LED_OFF;
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rt2x00pci_register_read(led->rt2x00dev, LEDCSR, ®);
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if (led->type == LED_TYPE_RADIO || led->type == LED_TYPE_ASSOC)
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rt2x00_set_field32(®, LEDCSR_LINK, enabled);
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else if (led->type == LED_TYPE_ACTIVITY)
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rt2x00_set_field32(®, LEDCSR_ACTIVITY, enabled);
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rt2x00pci_register_write(led->rt2x00dev, LEDCSR, reg);
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static int rt2400pci_blink_set(struct led_classdev *led_cdev,
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unsigned long *delay_on,
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unsigned long *delay_off)
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struct rt2x00_led *led =
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container_of(led_cdev, struct rt2x00_led, led_dev);
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rt2x00pci_register_read(led->rt2x00dev, LEDCSR, ®);
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rt2x00_set_field32(®, LEDCSR_ON_PERIOD, *delay_on);
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rt2x00_set_field32(®, LEDCSR_OFF_PERIOD, *delay_off);
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rt2x00pci_register_write(led->rt2x00dev, LEDCSR, reg);
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static void rt2400pci_init_led(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_led *led,
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led->rt2x00dev = rt2x00dev;
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led->led_dev.brightness_set = rt2400pci_brightness_set;
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led->led_dev.blink_set = rt2400pci_blink_set;
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led->flags = LED_INITIALIZED;
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#endif /* CONFIG_RT2X00_LIB_LEDS */
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* Configuration handlers.
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static void rt2400pci_config_filter(struct rt2x00_dev *rt2x00dev,
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const unsigned int filter_flags)
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* Start configuration steps.
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* Note that the version error will always be dropped
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* since there is no filter for it at this time.
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rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
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rt2x00_set_field32(®, RXCSR0_DROP_CRC,
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!(filter_flags & FIF_FCSFAIL));
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rt2x00_set_field32(®, RXCSR0_DROP_PHYSICAL,
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!(filter_flags & FIF_PLCPFAIL));
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rt2x00_set_field32(®, RXCSR0_DROP_CONTROL,
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!(filter_flags & FIF_CONTROL));
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rt2x00_set_field32(®, RXCSR0_DROP_NOT_TO_ME,
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!(filter_flags & FIF_PROMISC_IN_BSS));
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rt2x00_set_field32(®, RXCSR0_DROP_TODS,
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!(filter_flags & FIF_PROMISC_IN_BSS) &&
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!rt2x00dev->intf_ap_count);
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rt2x00_set_field32(®, RXCSR0_DROP_VERSION_ERROR, 1);
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rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
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static void rt2400pci_config_intf(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_intf *intf,
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struct rt2x00intf_conf *conf,
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const unsigned int flags)
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unsigned int bcn_preload;
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if (flags & CONFIG_UPDATE_TYPE) {
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* Enable beacon config
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bcn_preload = PREAMBLE + GET_DURATION(IEEE80211_HEADER, 20);
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rt2x00pci_register_read(rt2x00dev, BCNCSR1, ®);
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rt2x00_set_field32(®, BCNCSR1_PRELOAD, bcn_preload);
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rt2x00pci_register_write(rt2x00dev, BCNCSR1, reg);
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* Enable synchronisation.
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rt2x00pci_register_read(rt2x00dev, CSR14, ®);
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rt2x00_set_field32(®, CSR14_TSF_SYNC, conf->sync);
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rt2x00pci_register_write(rt2x00dev, CSR14, reg);
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if (flags & CONFIG_UPDATE_MAC)
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rt2x00pci_register_multiwrite(rt2x00dev, CSR3,
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conf->mac, sizeof(conf->mac));
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if (flags & CONFIG_UPDATE_BSSID)
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rt2x00pci_register_multiwrite(rt2x00dev, CSR5,
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conf->bssid, sizeof(conf->bssid));
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static void rt2400pci_config_erp(struct rt2x00_dev *rt2x00dev,
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struct rt2x00lib_erp *erp,
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* When short preamble is enabled, we should set bit 0x08
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if (changed & BSS_CHANGED_ERP_PREAMBLE) {
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preamble_mask = erp->short_preamble << 3;
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rt2x00pci_register_read(rt2x00dev, TXCSR1, ®);
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rt2x00_set_field32(®, TXCSR1_ACK_TIMEOUT, 0x1ff);
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rt2x00_set_field32(®, TXCSR1_ACK_CONSUME_TIME, 0x13a);
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rt2x00_set_field32(®, TXCSR1_TSF_OFFSET, IEEE80211_HEADER);
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rt2x00_set_field32(®, TXCSR1_AUTORESPONDER, 1);
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rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
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rt2x00pci_register_read(rt2x00dev, ARCSR2, ®);
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rt2x00_set_field32(®, ARCSR2_SIGNAL, 0x00);
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rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04);
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rt2x00_set_field32(®, ARCSR2_LENGTH,
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GET_DURATION(ACK_SIZE, 10));
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rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);
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rt2x00pci_register_read(rt2x00dev, ARCSR3, ®);
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rt2x00_set_field32(®, ARCSR3_SIGNAL, 0x01 | preamble_mask);
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rt2x00_set_field32(®, ARCSR3_SERVICE, 0x04);
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rt2x00_set_field32(®, ARCSR2_LENGTH,
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GET_DURATION(ACK_SIZE, 20));
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rt2x00pci_register_write(rt2x00dev, ARCSR3, reg);
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rt2x00pci_register_read(rt2x00dev, ARCSR4, ®);
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rt2x00_set_field32(®, ARCSR4_SIGNAL, 0x02 | preamble_mask);
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rt2x00_set_field32(®, ARCSR4_SERVICE, 0x04);
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rt2x00_set_field32(®, ARCSR2_LENGTH,
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GET_DURATION(ACK_SIZE, 55));
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rt2x00pci_register_write(rt2x00dev, ARCSR4, reg);
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rt2x00pci_register_read(rt2x00dev, ARCSR5, ®);
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rt2x00_set_field32(®, ARCSR5_SIGNAL, 0x03 | preamble_mask);
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rt2x00_set_field32(®, ARCSR5_SERVICE, 0x84);
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rt2x00_set_field32(®, ARCSR2_LENGTH,
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GET_DURATION(ACK_SIZE, 110));
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rt2x00pci_register_write(rt2x00dev, ARCSR5, reg);
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if (changed & BSS_CHANGED_BASIC_RATES)
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rt2x00pci_register_write(rt2x00dev, ARCSR1, erp->basic_rates);
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if (changed & BSS_CHANGED_ERP_SLOT) {
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rt2x00pci_register_read(rt2x00dev, CSR11, ®);
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rt2x00_set_field32(®, CSR11_SLOT_TIME, erp->slot_time);
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rt2x00pci_register_write(rt2x00dev, CSR11, reg);
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rt2x00pci_register_read(rt2x00dev, CSR18, ®);
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rt2x00_set_field32(®, CSR18_SIFS, erp->sifs);
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rt2x00_set_field32(®, CSR18_PIFS, erp->pifs);
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rt2x00pci_register_write(rt2x00dev, CSR18, reg);
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rt2x00pci_register_read(rt2x00dev, CSR19, ®);
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rt2x00_set_field32(®, CSR19_DIFS, erp->difs);
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rt2x00_set_field32(®, CSR19_EIFS, erp->eifs);
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rt2x00pci_register_write(rt2x00dev, CSR19, reg);
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if (changed & BSS_CHANGED_BEACON_INT) {
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rt2x00pci_register_read(rt2x00dev, CSR12, ®);
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rt2x00_set_field32(®, CSR12_BEACON_INTERVAL,
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erp->beacon_int * 16);
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rt2x00_set_field32(®, CSR12_CFP_MAX_DURATION,
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erp->beacon_int * 16);
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rt2x00pci_register_write(rt2x00dev, CSR12, reg);
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static void rt2400pci_config_ant(struct rt2x00_dev *rt2x00dev,
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struct antenna_setup *ant)
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* We should never come here because rt2x00lib is supposed
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* to catch this and send us the correct antenna explicitely.
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BUG_ON(ant->rx == ANTENNA_SW_DIVERSITY ||
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ant->tx == ANTENNA_SW_DIVERSITY);
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rt2400pci_bbp_read(rt2x00dev, 4, &r4);
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rt2400pci_bbp_read(rt2x00dev, 1, &r1);
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* Configure the TX antenna.
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case ANTENNA_HW_DIVERSITY:
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rt2x00_set_field8(&r1, BBP_R1_TX_ANTENNA, 1);
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rt2x00_set_field8(&r1, BBP_R1_TX_ANTENNA, 0);
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rt2x00_set_field8(&r1, BBP_R1_TX_ANTENNA, 2);
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* Configure the RX antenna.
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case ANTENNA_HW_DIVERSITY:
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rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 1);
439
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 0);
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rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA, 2);
447
rt2400pci_bbp_write(rt2x00dev, 4, r4);
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rt2400pci_bbp_write(rt2x00dev, 1, r1);
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static void rt2400pci_config_channel(struct rt2x00_dev *rt2x00dev,
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struct rf_channel *rf)
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* Switch on tuning bits.
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rt2x00_set_field32(&rf->rf1, RF1_TUNER, 1);
458
rt2x00_set_field32(&rf->rf3, RF3_TUNER, 1);
460
rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
461
rt2400pci_rf_write(rt2x00dev, 2, rf->rf2);
462
rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
465
* RF2420 chipset don't need any additional actions.
467
if (rt2x00_rf(rt2x00dev, RF2420))
471
* For the RT2421 chipsets we need to write an invalid
472
* reference clock rate to activate auto_tune.
473
* After that we set the value back to the correct channel.
475
rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
476
rt2400pci_rf_write(rt2x00dev, 2, 0x000c2a32);
477
rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
481
rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
482
rt2400pci_rf_write(rt2x00dev, 2, rf->rf2);
483
rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
488
* Switch off tuning bits.
490
rt2x00_set_field32(&rf->rf1, RF1_TUNER, 0);
491
rt2x00_set_field32(&rf->rf3, RF3_TUNER, 0);
493
rt2400pci_rf_write(rt2x00dev, 1, rf->rf1);
494
rt2400pci_rf_write(rt2x00dev, 3, rf->rf3);
497
* Clear false CRC during channel switch.
499
rt2x00pci_register_read(rt2x00dev, CNT0, &rf->rf1);
502
static void rt2400pci_config_txpower(struct rt2x00_dev *rt2x00dev, int txpower)
504
rt2400pci_bbp_write(rt2x00dev, 3, TXPOWER_TO_DEV(txpower));
507
static void rt2400pci_config_retry_limit(struct rt2x00_dev *rt2x00dev,
508
struct rt2x00lib_conf *libconf)
512
rt2x00pci_register_read(rt2x00dev, CSR11, ®);
513
rt2x00_set_field32(®, CSR11_LONG_RETRY,
514
libconf->conf->long_frame_max_tx_count);
515
rt2x00_set_field32(®, CSR11_SHORT_RETRY,
516
libconf->conf->short_frame_max_tx_count);
517
rt2x00pci_register_write(rt2x00dev, CSR11, reg);
520
static void rt2400pci_config_ps(struct rt2x00_dev *rt2x00dev,
521
struct rt2x00lib_conf *libconf)
523
enum dev_state state =
524
(libconf->conf->flags & IEEE80211_CONF_PS) ?
525
STATE_SLEEP : STATE_AWAKE;
528
if (state == STATE_SLEEP) {
529
rt2x00pci_register_read(rt2x00dev, CSR20, ®);
530
rt2x00_set_field32(®, CSR20_DELAY_AFTER_TBCN,
531
(rt2x00dev->beacon_int - 20) * 16);
532
rt2x00_set_field32(®, CSR20_TBCN_BEFORE_WAKEUP,
533
libconf->conf->listen_interval - 1);
535
/* We must first disable autowake before it can be enabled */
536
rt2x00_set_field32(®, CSR20_AUTOWAKE, 0);
537
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
539
rt2x00_set_field32(®, CSR20_AUTOWAKE, 1);
540
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
542
rt2x00pci_register_read(rt2x00dev, CSR20, ®);
543
rt2x00_set_field32(®, CSR20_AUTOWAKE, 0);
544
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
547
rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
550
static void rt2400pci_config(struct rt2x00_dev *rt2x00dev,
551
struct rt2x00lib_conf *libconf,
552
const unsigned int flags)
554
if (flags & IEEE80211_CONF_CHANGE_CHANNEL)
555
rt2400pci_config_channel(rt2x00dev, &libconf->rf);
556
if (flags & IEEE80211_CONF_CHANGE_POWER)
557
rt2400pci_config_txpower(rt2x00dev,
558
libconf->conf->power_level);
559
if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
560
rt2400pci_config_retry_limit(rt2x00dev, libconf);
561
if (flags & IEEE80211_CONF_CHANGE_PS)
562
rt2400pci_config_ps(rt2x00dev, libconf);
565
static void rt2400pci_config_cw(struct rt2x00_dev *rt2x00dev,
566
const int cw_min, const int cw_max)
570
rt2x00pci_register_read(rt2x00dev, CSR11, ®);
571
rt2x00_set_field32(®, CSR11_CWMIN, cw_min);
572
rt2x00_set_field32(®, CSR11_CWMAX, cw_max);
573
rt2x00pci_register_write(rt2x00dev, CSR11, reg);
579
static void rt2400pci_link_stats(struct rt2x00_dev *rt2x00dev,
580
struct link_qual *qual)
586
* Update FCS error count from register.
588
rt2x00pci_register_read(rt2x00dev, CNT0, ®);
589
qual->rx_failed = rt2x00_get_field32(reg, CNT0_FCS_ERROR);
592
* Update False CCA count from register.
594
rt2400pci_bbp_read(rt2x00dev, 39, &bbp);
595
qual->false_cca = bbp;
598
static inline void rt2400pci_set_vgc(struct rt2x00_dev *rt2x00dev,
599
struct link_qual *qual, u8 vgc_level)
601
if (qual->vgc_level_reg != vgc_level) {
602
rt2400pci_bbp_write(rt2x00dev, 13, vgc_level);
603
qual->vgc_level = vgc_level;
604
qual->vgc_level_reg = vgc_level;
608
static void rt2400pci_reset_tuner(struct rt2x00_dev *rt2x00dev,
609
struct link_qual *qual)
611
rt2400pci_set_vgc(rt2x00dev, qual, 0x08);
614
static void rt2400pci_link_tuner(struct rt2x00_dev *rt2x00dev,
615
struct link_qual *qual, const u32 count)
618
* The link tuner should not run longer then 60 seconds,
619
* and should run once every 2 seconds.
621
if (count > 60 || !(count & 1))
625
* Base r13 link tuning on the false cca count.
627
if ((qual->false_cca > 512) && (qual->vgc_level < 0x20))
628
rt2400pci_set_vgc(rt2x00dev, qual, ++qual->vgc_level);
629
else if ((qual->false_cca < 100) && (qual->vgc_level > 0x08))
630
rt2400pci_set_vgc(rt2x00dev, qual, --qual->vgc_level);
636
static void rt2400pci_start_queue(struct data_queue *queue)
638
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
641
switch (queue->qid) {
643
rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
644
rt2x00_set_field32(®, RXCSR0_DISABLE_RX, 0);
645
rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
648
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
649
rt2x00_set_field32(®, CSR14_TSF_COUNT, 1);
650
rt2x00_set_field32(®, CSR14_TBCN, 1);
651
rt2x00_set_field32(®, CSR14_BEACON_GEN, 1);
652
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
659
static void rt2400pci_kick_queue(struct data_queue *queue)
661
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
664
switch (queue->qid) {
666
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
667
rt2x00_set_field32(®, TXCSR0_KICK_PRIO, 1);
668
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
671
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
672
rt2x00_set_field32(®, TXCSR0_KICK_TX, 1);
673
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
676
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
677
rt2x00_set_field32(®, TXCSR0_KICK_ATIM, 1);
678
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
685
static void rt2400pci_stop_queue(struct data_queue *queue)
687
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
690
switch (queue->qid) {
694
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
695
rt2x00_set_field32(®, TXCSR0_ABORT, 1);
696
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
699
rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
700
rt2x00_set_field32(®, RXCSR0_DISABLE_RX, 1);
701
rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
704
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
705
rt2x00_set_field32(®, CSR14_TSF_COUNT, 0);
706
rt2x00_set_field32(®, CSR14_TBCN, 0);
707
rt2x00_set_field32(®, CSR14_BEACON_GEN, 0);
708
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
711
* Wait for possibly running tbtt tasklets.
713
tasklet_kill(&rt2x00dev->tbtt_tasklet);
721
* Initialization functions.
723
static bool rt2400pci_get_entry_state(struct queue_entry *entry)
725
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
728
if (entry->queue->qid == QID_RX) {
729
rt2x00_desc_read(entry_priv->desc, 0, &word);
731
return rt2x00_get_field32(word, RXD_W0_OWNER_NIC);
733
rt2x00_desc_read(entry_priv->desc, 0, &word);
735
return (rt2x00_get_field32(word, TXD_W0_OWNER_NIC) ||
736
rt2x00_get_field32(word, TXD_W0_VALID));
740
static void rt2400pci_clear_entry(struct queue_entry *entry)
742
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
743
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
746
if (entry->queue->qid == QID_RX) {
747
rt2x00_desc_read(entry_priv->desc, 2, &word);
748
rt2x00_set_field32(&word, RXD_W2_BUFFER_LENGTH, entry->skb->len);
749
rt2x00_desc_write(entry_priv->desc, 2, word);
751
rt2x00_desc_read(entry_priv->desc, 1, &word);
752
rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma);
753
rt2x00_desc_write(entry_priv->desc, 1, word);
755
rt2x00_desc_read(entry_priv->desc, 0, &word);
756
rt2x00_set_field32(&word, RXD_W0_OWNER_NIC, 1);
757
rt2x00_desc_write(entry_priv->desc, 0, word);
759
rt2x00_desc_read(entry_priv->desc, 0, &word);
760
rt2x00_set_field32(&word, TXD_W0_VALID, 0);
761
rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 0);
762
rt2x00_desc_write(entry_priv->desc, 0, word);
766
static int rt2400pci_init_queues(struct rt2x00_dev *rt2x00dev)
768
struct queue_entry_priv_pci *entry_priv;
772
* Initialize registers.
774
rt2x00pci_register_read(rt2x00dev, TXCSR2, ®);
775
rt2x00_set_field32(®, TXCSR2_TXD_SIZE, rt2x00dev->tx[0].desc_size);
776
rt2x00_set_field32(®, TXCSR2_NUM_TXD, rt2x00dev->tx[1].limit);
777
rt2x00_set_field32(®, TXCSR2_NUM_ATIM, rt2x00dev->atim->limit);
778
rt2x00_set_field32(®, TXCSR2_NUM_PRIO, rt2x00dev->tx[0].limit);
779
rt2x00pci_register_write(rt2x00dev, TXCSR2, reg);
781
entry_priv = rt2x00dev->tx[1].entries[0].priv_data;
782
rt2x00pci_register_read(rt2x00dev, TXCSR3, ®);
783
rt2x00_set_field32(®, TXCSR3_TX_RING_REGISTER,
784
entry_priv->desc_dma);
785
rt2x00pci_register_write(rt2x00dev, TXCSR3, reg);
787
entry_priv = rt2x00dev->tx[0].entries[0].priv_data;
788
rt2x00pci_register_read(rt2x00dev, TXCSR5, ®);
789
rt2x00_set_field32(®, TXCSR5_PRIO_RING_REGISTER,
790
entry_priv->desc_dma);
791
rt2x00pci_register_write(rt2x00dev, TXCSR5, reg);
793
entry_priv = rt2x00dev->atim->entries[0].priv_data;
794
rt2x00pci_register_read(rt2x00dev, TXCSR4, ®);
795
rt2x00_set_field32(®, TXCSR4_ATIM_RING_REGISTER,
796
entry_priv->desc_dma);
797
rt2x00pci_register_write(rt2x00dev, TXCSR4, reg);
799
entry_priv = rt2x00dev->bcn->entries[0].priv_data;
800
rt2x00pci_register_read(rt2x00dev, TXCSR6, ®);
801
rt2x00_set_field32(®, TXCSR6_BEACON_RING_REGISTER,
802
entry_priv->desc_dma);
803
rt2x00pci_register_write(rt2x00dev, TXCSR6, reg);
805
rt2x00pci_register_read(rt2x00dev, RXCSR1, ®);
806
rt2x00_set_field32(®, RXCSR1_RXD_SIZE, rt2x00dev->rx->desc_size);
807
rt2x00_set_field32(®, RXCSR1_NUM_RXD, rt2x00dev->rx->limit);
808
rt2x00pci_register_write(rt2x00dev, RXCSR1, reg);
810
entry_priv = rt2x00dev->rx->entries[0].priv_data;
811
rt2x00pci_register_read(rt2x00dev, RXCSR2, ®);
812
rt2x00_set_field32(®, RXCSR2_RX_RING_REGISTER,
813
entry_priv->desc_dma);
814
rt2x00pci_register_write(rt2x00dev, RXCSR2, reg);
819
static int rt2400pci_init_registers(struct rt2x00_dev *rt2x00dev)
823
rt2x00pci_register_write(rt2x00dev, PSCSR0, 0x00020002);
824
rt2x00pci_register_write(rt2x00dev, PSCSR1, 0x00000002);
825
rt2x00pci_register_write(rt2x00dev, PSCSR2, 0x00023f20);
826
rt2x00pci_register_write(rt2x00dev, PSCSR3, 0x00000002);
828
rt2x00pci_register_read(rt2x00dev, TIMECSR, ®);
829
rt2x00_set_field32(®, TIMECSR_US_COUNT, 33);
830
rt2x00_set_field32(®, TIMECSR_US_64_COUNT, 63);
831
rt2x00_set_field32(®, TIMECSR_BEACON_EXPECT, 0);
832
rt2x00pci_register_write(rt2x00dev, TIMECSR, reg);
834
rt2x00pci_register_read(rt2x00dev, CSR9, ®);
835
rt2x00_set_field32(®, CSR9_MAX_FRAME_UNIT,
836
(rt2x00dev->rx->data_size / 128));
837
rt2x00pci_register_write(rt2x00dev, CSR9, reg);
839
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
840
rt2x00_set_field32(®, CSR14_TSF_COUNT, 0);
841
rt2x00_set_field32(®, CSR14_TSF_SYNC, 0);
842
rt2x00_set_field32(®, CSR14_TBCN, 0);
843
rt2x00_set_field32(®, CSR14_TCFP, 0);
844
rt2x00_set_field32(®, CSR14_TATIMW, 0);
845
rt2x00_set_field32(®, CSR14_BEACON_GEN, 0);
846
rt2x00_set_field32(®, CSR14_CFP_COUNT_PRELOAD, 0);
847
rt2x00_set_field32(®, CSR14_TBCM_PRELOAD, 0);
848
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
850
rt2x00pci_register_write(rt2x00dev, CNT3, 0x3f080000);
852
rt2x00pci_register_read(rt2x00dev, ARCSR0, ®);
853
rt2x00_set_field32(®, ARCSR0_AR_BBP_DATA0, 133);
854
rt2x00_set_field32(®, ARCSR0_AR_BBP_ID0, 134);
855
rt2x00_set_field32(®, ARCSR0_AR_BBP_DATA1, 136);
856
rt2x00_set_field32(®, ARCSR0_AR_BBP_ID1, 135);
857
rt2x00pci_register_write(rt2x00dev, ARCSR0, reg);
859
rt2x00pci_register_read(rt2x00dev, RXCSR3, ®);
860
rt2x00_set_field32(®, RXCSR3_BBP_ID0, 3); /* Tx power.*/
861
rt2x00_set_field32(®, RXCSR3_BBP_ID0_VALID, 1);
862
rt2x00_set_field32(®, RXCSR3_BBP_ID1, 32); /* Signal */
863
rt2x00_set_field32(®, RXCSR3_BBP_ID1_VALID, 1);
864
rt2x00_set_field32(®, RXCSR3_BBP_ID2, 36); /* Rssi */
865
rt2x00_set_field32(®, RXCSR3_BBP_ID2_VALID, 1);
866
rt2x00pci_register_write(rt2x00dev, RXCSR3, reg);
868
rt2x00pci_register_write(rt2x00dev, PWRCSR0, 0x3f3b3100);
870
if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
873
rt2x00pci_register_write(rt2x00dev, MACCSR0, 0x00217223);
874
rt2x00pci_register_write(rt2x00dev, MACCSR1, 0x00235518);
876
rt2x00pci_register_read(rt2x00dev, MACCSR2, ®);
877
rt2x00_set_field32(®, MACCSR2_DELAY, 64);
878
rt2x00pci_register_write(rt2x00dev, MACCSR2, reg);
880
rt2x00pci_register_read(rt2x00dev, RALINKCSR, ®);
881
rt2x00_set_field32(®, RALINKCSR_AR_BBP_DATA0, 17);
882
rt2x00_set_field32(®, RALINKCSR_AR_BBP_ID0, 154);
883
rt2x00_set_field32(®, RALINKCSR_AR_BBP_DATA1, 0);
884
rt2x00_set_field32(®, RALINKCSR_AR_BBP_ID1, 154);
885
rt2x00pci_register_write(rt2x00dev, RALINKCSR, reg);
887
rt2x00pci_register_read(rt2x00dev, CSR1, ®);
888
rt2x00_set_field32(®, CSR1_SOFT_RESET, 1);
889
rt2x00_set_field32(®, CSR1_BBP_RESET, 0);
890
rt2x00_set_field32(®, CSR1_HOST_READY, 0);
891
rt2x00pci_register_write(rt2x00dev, CSR1, reg);
893
rt2x00pci_register_read(rt2x00dev, CSR1, ®);
894
rt2x00_set_field32(®, CSR1_SOFT_RESET, 0);
895
rt2x00_set_field32(®, CSR1_HOST_READY, 1);
896
rt2x00pci_register_write(rt2x00dev, CSR1, reg);
899
* We must clear the FCS and FIFO error count.
900
* These registers are cleared on read,
901
* so we may pass a useless variable to store the value.
903
rt2x00pci_register_read(rt2x00dev, CNT0, ®);
904
rt2x00pci_register_read(rt2x00dev, CNT4, ®);
909
static int rt2400pci_wait_bbp_ready(struct rt2x00_dev *rt2x00dev)
914
for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
915
rt2400pci_bbp_read(rt2x00dev, 0, &value);
916
if ((value != 0xff) && (value != 0x00))
918
udelay(REGISTER_BUSY_DELAY);
921
ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
925
static int rt2400pci_init_bbp(struct rt2x00_dev *rt2x00dev)
932
if (unlikely(rt2400pci_wait_bbp_ready(rt2x00dev)))
935
rt2400pci_bbp_write(rt2x00dev, 1, 0x00);
936
rt2400pci_bbp_write(rt2x00dev, 3, 0x27);
937
rt2400pci_bbp_write(rt2x00dev, 4, 0x08);
938
rt2400pci_bbp_write(rt2x00dev, 10, 0x0f);
939
rt2400pci_bbp_write(rt2x00dev, 15, 0x72);
940
rt2400pci_bbp_write(rt2x00dev, 16, 0x74);
941
rt2400pci_bbp_write(rt2x00dev, 17, 0x20);
942
rt2400pci_bbp_write(rt2x00dev, 18, 0x72);
943
rt2400pci_bbp_write(rt2x00dev, 19, 0x0b);
944
rt2400pci_bbp_write(rt2x00dev, 20, 0x00);
945
rt2400pci_bbp_write(rt2x00dev, 28, 0x11);
946
rt2400pci_bbp_write(rt2x00dev, 29, 0x04);
947
rt2400pci_bbp_write(rt2x00dev, 30, 0x21);
948
rt2400pci_bbp_write(rt2x00dev, 31, 0x00);
950
for (i = 0; i < EEPROM_BBP_SIZE; i++) {
951
rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);
953
if (eeprom != 0xffff && eeprom != 0x0000) {
954
reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
955
value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
956
rt2400pci_bbp_write(rt2x00dev, reg_id, value);
964
* Device state switch handlers.
966
static void rt2400pci_toggle_irq(struct rt2x00_dev *rt2x00dev,
967
enum dev_state state)
969
int mask = (state == STATE_RADIO_IRQ_OFF);
974
* When interrupts are being enabled, the interrupt registers
975
* should clear the register to assure a clean state.
977
if (state == STATE_RADIO_IRQ_ON) {
978
rt2x00pci_register_read(rt2x00dev, CSR7, ®);
979
rt2x00pci_register_write(rt2x00dev, CSR7, reg);
983
* Only toggle the interrupts bits we are going to use.
984
* Non-checked interrupt bits are disabled by default.
986
spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags);
988
rt2x00pci_register_read(rt2x00dev, CSR8, ®);
989
rt2x00_set_field32(®, CSR8_TBCN_EXPIRE, mask);
990
rt2x00_set_field32(®, CSR8_TXDONE_TXRING, mask);
991
rt2x00_set_field32(®, CSR8_TXDONE_ATIMRING, mask);
992
rt2x00_set_field32(®, CSR8_TXDONE_PRIORING, mask);
993
rt2x00_set_field32(®, CSR8_RXDONE, mask);
994
rt2x00pci_register_write(rt2x00dev, CSR8, reg);
996
spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags);
998
if (state == STATE_RADIO_IRQ_OFF) {
1000
* Ensure that all tasklets are finished before
1001
* disabling the interrupts.
1003
tasklet_kill(&rt2x00dev->txstatus_tasklet);
1004
tasklet_kill(&rt2x00dev->rxdone_tasklet);
1005
tasklet_kill(&rt2x00dev->tbtt_tasklet);
1009
static int rt2400pci_enable_radio(struct rt2x00_dev *rt2x00dev)
1012
* Initialize all registers.
1014
if (unlikely(rt2400pci_init_queues(rt2x00dev) ||
1015
rt2400pci_init_registers(rt2x00dev) ||
1016
rt2400pci_init_bbp(rt2x00dev)))
1022
static void rt2400pci_disable_radio(struct rt2x00_dev *rt2x00dev)
1027
rt2x00pci_register_write(rt2x00dev, PWRCSR0, 0);
1030
static int rt2400pci_set_state(struct rt2x00_dev *rt2x00dev,
1031
enum dev_state state)
1039
put_to_sleep = (state != STATE_AWAKE);
1041
rt2x00pci_register_read(rt2x00dev, PWRCSR1, ®);
1042
rt2x00_set_field32(®, PWRCSR1_SET_STATE, 1);
1043
rt2x00_set_field32(®, PWRCSR1_BBP_DESIRE_STATE, state);
1044
rt2x00_set_field32(®, PWRCSR1_RF_DESIRE_STATE, state);
1045
rt2x00_set_field32(®, PWRCSR1_PUT_TO_SLEEP, put_to_sleep);
1046
rt2x00pci_register_write(rt2x00dev, PWRCSR1, reg);
1049
* Device is not guaranteed to be in the requested state yet.
1050
* We must wait until the register indicates that the
1051
* device has entered the correct state.
1053
for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
1054
rt2x00pci_register_read(rt2x00dev, PWRCSR1, ®2);
1055
bbp_state = rt2x00_get_field32(reg2, PWRCSR1_BBP_CURR_STATE);
1056
rf_state = rt2x00_get_field32(reg2, PWRCSR1_RF_CURR_STATE);
1057
if (bbp_state == state && rf_state == state)
1059
rt2x00pci_register_write(rt2x00dev, PWRCSR1, reg);
1066
static int rt2400pci_set_device_state(struct rt2x00_dev *rt2x00dev,
1067
enum dev_state state)
1072
case STATE_RADIO_ON:
1073
retval = rt2400pci_enable_radio(rt2x00dev);
1075
case STATE_RADIO_OFF:
1076
rt2400pci_disable_radio(rt2x00dev);
1078
case STATE_RADIO_IRQ_ON:
1079
case STATE_RADIO_IRQ_OFF:
1080
rt2400pci_toggle_irq(rt2x00dev, state);
1082
case STATE_DEEP_SLEEP:
1086
retval = rt2400pci_set_state(rt2x00dev, state);
1093
if (unlikely(retval))
1094
ERROR(rt2x00dev, "Device failed to enter state %d (%d).\n",
1101
* TX descriptor initialization
1103
static void rt2400pci_write_tx_desc(struct queue_entry *entry,
1104
struct txentry_desc *txdesc)
1106
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
1107
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
1108
__le32 *txd = entry_priv->desc;
1112
* Start writing the descriptor words.
1114
rt2x00_desc_read(txd, 1, &word);
1115
rt2x00_set_field32(&word, TXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma);
1116
rt2x00_desc_write(txd, 1, word);
1118
rt2x00_desc_read(txd, 2, &word);
1119
rt2x00_set_field32(&word, TXD_W2_BUFFER_LENGTH, txdesc->length);
1120
rt2x00_set_field32(&word, TXD_W2_DATABYTE_COUNT, txdesc->length);
1121
rt2x00_desc_write(txd, 2, word);
1123
rt2x00_desc_read(txd, 3, &word);
1124
rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL, txdesc->u.plcp.signal);
1125
rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL_REGNUM, 5);
1126
rt2x00_set_field32(&word, TXD_W3_PLCP_SIGNAL_BUSY, 1);
1127
rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE, txdesc->u.plcp.service);
1128
rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE_REGNUM, 6);
1129
rt2x00_set_field32(&word, TXD_W3_PLCP_SERVICE_BUSY, 1);
1130
rt2x00_desc_write(txd, 3, word);
1132
rt2x00_desc_read(txd, 4, &word);
1133
rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_LOW,
1134
txdesc->u.plcp.length_low);
1135
rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_LOW_REGNUM, 8);
1136
rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_LOW_BUSY, 1);
1137
rt2x00_set_field32(&word, TXD_W4_PLCP_LENGTH_HIGH,
1138
txdesc->u.plcp.length_high);
1139
rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_HIGH_REGNUM, 7);
1140
rt2x00_set_field32(&word, TXD_W3_PLCP_LENGTH_HIGH_BUSY, 1);
1141
rt2x00_desc_write(txd, 4, word);
1144
* Writing TXD word 0 must the last to prevent a race condition with
1145
* the device, whereby the device may take hold of the TXD before we
1146
* finished updating it.
1148
rt2x00_desc_read(txd, 0, &word);
1149
rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 1);
1150
rt2x00_set_field32(&word, TXD_W0_VALID, 1);
1151
rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
1152
test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
1153
rt2x00_set_field32(&word, TXD_W0_ACK,
1154
test_bit(ENTRY_TXD_ACK, &txdesc->flags));
1155
rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
1156
test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));
1157
rt2x00_set_field32(&word, TXD_W0_RTS,
1158
test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags));
1159
rt2x00_set_field32(&word, TXD_W0_IFS, txdesc->u.plcp.ifs);
1160
rt2x00_set_field32(&word, TXD_W0_RETRY_MODE,
1161
test_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags));
1162
rt2x00_desc_write(txd, 0, word);
1165
* Register descriptor details in skb frame descriptor.
1167
skbdesc->desc = txd;
1168
skbdesc->desc_len = TXD_DESC_SIZE;
1172
* TX data initialization
1174
static void rt2400pci_write_beacon(struct queue_entry *entry,
1175
struct txentry_desc *txdesc)
1177
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
1181
* Disable beaconing while we are reloading the beacon data,
1182
* otherwise we might be sending out invalid data.
1184
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
1185
rt2x00_set_field32(®, CSR14_BEACON_GEN, 0);
1186
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
1188
rt2x00queue_map_txskb(entry);
1191
* Write the TX descriptor for the beacon.
1193
rt2400pci_write_tx_desc(entry, txdesc);
1196
* Dump beacon to userspace through debugfs.
1198
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_BEACON, entry->skb);
1201
* Enable beaconing again.
1203
rt2x00_set_field32(®, CSR14_BEACON_GEN, 1);
1204
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
1208
* RX control handlers
1210
static void rt2400pci_fill_rxdone(struct queue_entry *entry,
1211
struct rxdone_entry_desc *rxdesc)
1213
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
1214
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
1223
rt2x00_desc_read(entry_priv->desc, 0, &word0);
1224
rt2x00_desc_read(entry_priv->desc, 2, &word2);
1225
rt2x00_desc_read(entry_priv->desc, 3, &word3);
1226
rt2x00_desc_read(entry_priv->desc, 4, &word4);
1228
if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
1229
rxdesc->flags |= RX_FLAG_FAILED_FCS_CRC;
1230
if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
1231
rxdesc->flags |= RX_FLAG_FAILED_PLCP_CRC;
1234
* We only get the lower 32bits from the timestamp,
1235
* to get the full 64bits we must complement it with
1236
* the timestamp from get_tsf().
1237
* Note that when a wraparound of the lower 32bits
1238
* has occurred between the frame arrival and the get_tsf()
1239
* call, we must decrease the higher 32bits with 1 to get
1242
tsf = rt2x00dev->ops->hw->get_tsf(rt2x00dev->hw, NULL);
1243
rx_low = rt2x00_get_field32(word4, RXD_W4_RX_END_TIME);
1244
rx_high = upper_32_bits(tsf);
1246
if ((u32)tsf <= rx_low)
1250
* Obtain the status about this packet.
1251
* The signal is the PLCP value, and needs to be stripped
1252
* of the preamble bit (0x08).
1254
rxdesc->timestamp = ((u64)rx_high << 32) | rx_low;
1255
rxdesc->signal = rt2x00_get_field32(word2, RXD_W2_SIGNAL) & ~0x08;
1256
rxdesc->rssi = rt2x00_get_field32(word2, RXD_W3_RSSI) -
1257
entry->queue->rt2x00dev->rssi_offset;
1258
rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
1260
rxdesc->dev_flags |= RXDONE_SIGNAL_PLCP;
1261
if (rt2x00_get_field32(word0, RXD_W0_MY_BSS))
1262
rxdesc->dev_flags |= RXDONE_MY_BSS;
1266
* Interrupt functions.
1268
static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev,
1269
const enum data_queue_qid queue_idx)
1271
struct data_queue *queue = rt2x00queue_get_tx_queue(rt2x00dev, queue_idx);
1272
struct queue_entry_priv_pci *entry_priv;
1273
struct queue_entry *entry;
1274
struct txdone_entry_desc txdesc;
1277
while (!rt2x00queue_empty(queue)) {
1278
entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
1279
entry_priv = entry->priv_data;
1280
rt2x00_desc_read(entry_priv->desc, 0, &word);
1282
if (rt2x00_get_field32(word, TXD_W0_OWNER_NIC) ||
1283
!rt2x00_get_field32(word, TXD_W0_VALID))
1287
* Obtain the status about this packet.
1290
switch (rt2x00_get_field32(word, TXD_W0_RESULT)) {
1291
case 0: /* Success */
1292
case 1: /* Success with retry */
1293
__set_bit(TXDONE_SUCCESS, &txdesc.flags);
1295
case 2: /* Failure, excessive retries */
1296
__set_bit(TXDONE_EXCESSIVE_RETRY, &txdesc.flags);
1297
/* Don't break, this is a failed frame! */
1298
default: /* Failure */
1299
__set_bit(TXDONE_FAILURE, &txdesc.flags);
1301
txdesc.retry = rt2x00_get_field32(word, TXD_W0_RETRY_COUNT);
1303
rt2x00lib_txdone(entry, &txdesc);
1307
static inline void rt2400pci_enable_interrupt(struct rt2x00_dev *rt2x00dev,
1308
struct rt2x00_field32 irq_field)
1313
* Enable a single interrupt. The interrupt mask register
1314
* access needs locking.
1316
spin_lock_irq(&rt2x00dev->irqmask_lock);
1318
rt2x00pci_register_read(rt2x00dev, CSR8, ®);
1319
rt2x00_set_field32(®, irq_field, 0);
1320
rt2x00pci_register_write(rt2x00dev, CSR8, reg);
1322
spin_unlock_irq(&rt2x00dev->irqmask_lock);
1325
static void rt2400pci_txstatus_tasklet(unsigned long data)
1327
struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data;
1331
* Handle all tx queues.
1333
rt2400pci_txdone(rt2x00dev, QID_ATIM);
1334
rt2400pci_txdone(rt2x00dev, QID_AC_VO);
1335
rt2400pci_txdone(rt2x00dev, QID_AC_VI);
1338
* Enable all TXDONE interrupts again.
1340
if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) {
1341
spin_lock_irq(&rt2x00dev->irqmask_lock);
1343
rt2x00pci_register_read(rt2x00dev, CSR8, ®);
1344
rt2x00_set_field32(®, CSR8_TXDONE_TXRING, 0);
1345
rt2x00_set_field32(®, CSR8_TXDONE_ATIMRING, 0);
1346
rt2x00_set_field32(®, CSR8_TXDONE_PRIORING, 0);
1347
rt2x00pci_register_write(rt2x00dev, CSR8, reg);
1349
spin_unlock_irq(&rt2x00dev->irqmask_lock);
1353
static void rt2400pci_tbtt_tasklet(unsigned long data)
1355
struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data;
1356
rt2x00lib_beacondone(rt2x00dev);
1357
if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
1358
rt2400pci_enable_interrupt(rt2x00dev, CSR8_TBCN_EXPIRE);
1361
static void rt2400pci_rxdone_tasklet(unsigned long data)
1363
struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data;
1364
if (rt2x00pci_rxdone(rt2x00dev))
1365
tasklet_schedule(&rt2x00dev->rxdone_tasklet);
1366
else if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
1367
rt2400pci_enable_interrupt(rt2x00dev, CSR8_RXDONE);
1370
static irqreturn_t rt2400pci_interrupt(int irq, void *dev_instance)
1372
struct rt2x00_dev *rt2x00dev = dev_instance;
1376
* Get the interrupt sources & saved to local variable.
1377
* Write register value back to clear pending interrupts.
1379
rt2x00pci_register_read(rt2x00dev, CSR7, ®);
1380
rt2x00pci_register_write(rt2x00dev, CSR7, reg);
1385
if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
1391
* Schedule tasklets for interrupt handling.
1393
if (rt2x00_get_field32(reg, CSR7_TBCN_EXPIRE))
1394
tasklet_hi_schedule(&rt2x00dev->tbtt_tasklet);
1396
if (rt2x00_get_field32(reg, CSR7_RXDONE))
1397
tasklet_schedule(&rt2x00dev->rxdone_tasklet);
1399
if (rt2x00_get_field32(reg, CSR7_TXDONE_ATIMRING) ||
1400
rt2x00_get_field32(reg, CSR7_TXDONE_PRIORING) ||
1401
rt2x00_get_field32(reg, CSR7_TXDONE_TXRING)) {
1402
tasklet_schedule(&rt2x00dev->txstatus_tasklet);
1404
* Mask out all txdone interrupts.
1406
rt2x00_set_field32(&mask, CSR8_TXDONE_TXRING, 1);
1407
rt2x00_set_field32(&mask, CSR8_TXDONE_ATIMRING, 1);
1408
rt2x00_set_field32(&mask, CSR8_TXDONE_PRIORING, 1);
1412
* Disable all interrupts for which a tasklet was scheduled right now,
1413
* the tasklet will reenable the appropriate interrupts.
1415
spin_lock(&rt2x00dev->irqmask_lock);
1417
rt2x00pci_register_read(rt2x00dev, CSR8, ®);
1419
rt2x00pci_register_write(rt2x00dev, CSR8, reg);
1421
spin_unlock(&rt2x00dev->irqmask_lock);
1429
* Device probe functions.
1431
static int rt2400pci_validate_eeprom(struct rt2x00_dev *rt2x00dev)
1433
struct eeprom_93cx6 eeprom;
1438
rt2x00pci_register_read(rt2x00dev, CSR21, ®);
1440
eeprom.data = rt2x00dev;
1441
eeprom.register_read = rt2400pci_eepromregister_read;
1442
eeprom.register_write = rt2400pci_eepromregister_write;
1443
eeprom.width = rt2x00_get_field32(reg, CSR21_TYPE_93C46) ?
1444
PCI_EEPROM_WIDTH_93C46 : PCI_EEPROM_WIDTH_93C66;
1445
eeprom.reg_data_in = 0;
1446
eeprom.reg_data_out = 0;
1447
eeprom.reg_data_clock = 0;
1448
eeprom.reg_chip_select = 0;
1450
eeprom_93cx6_multiread(&eeprom, EEPROM_BASE, rt2x00dev->eeprom,
1451
EEPROM_SIZE / sizeof(u16));
1454
* Start validation of the data that has been read.
1456
mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
1457
if (!is_valid_ether_addr(mac)) {
1458
random_ether_addr(mac);
1459
EEPROM(rt2x00dev, "MAC: %pM\n", mac);
1462
rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
1463
if (word == 0xffff) {
1464
ERROR(rt2x00dev, "Invalid EEPROM data detected.\n");
1471
static int rt2400pci_init_eeprom(struct rt2x00_dev *rt2x00dev)
1478
* Read EEPROM word for configuration.
1480
rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
1483
* Identify RF chipset.
1485
value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
1486
rt2x00pci_register_read(rt2x00dev, CSR0, ®);
1487
rt2x00_set_chip(rt2x00dev, RT2460, value,
1488
rt2x00_get_field32(reg, CSR0_REVISION));
1490
if (!rt2x00_rf(rt2x00dev, RF2420) && !rt2x00_rf(rt2x00dev, RF2421)) {
1491
ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
1496
* Identify default antenna configuration.
1498
rt2x00dev->default_ant.tx =
1499
rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TX_DEFAULT);
1500
rt2x00dev->default_ant.rx =
1501
rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_DEFAULT);
1504
* When the eeprom indicates SW_DIVERSITY use HW_DIVERSITY instead.
1505
* I am not 100% sure about this, but the legacy drivers do not
1506
* indicate antenna swapping in software is required when
1507
* diversity is enabled.
1509
if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
1510
rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY;
1511
if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
1512
rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY;
1515
* Store led mode, for correct led behaviour.
1517
#ifdef CONFIG_RT2X00_LIB_LEDS
1518
value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_LED_MODE);
1520
rt2400pci_init_led(rt2x00dev, &rt2x00dev->led_radio, LED_TYPE_RADIO);
1521
if (value == LED_MODE_TXRX_ACTIVITY ||
1522
value == LED_MODE_DEFAULT ||
1523
value == LED_MODE_ASUS)
1524
rt2400pci_init_led(rt2x00dev, &rt2x00dev->led_qual,
1526
#endif /* CONFIG_RT2X00_LIB_LEDS */
1529
* Detect if this device has an hardware controlled radio.
1531
if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_HARDWARE_RADIO))
1532
__set_bit(CAPABILITY_HW_BUTTON, &rt2x00dev->cap_flags);
1535
* Check if the BBP tuning should be enabled.
1537
if (rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_AGCVGC_TUNING))
1538
__set_bit(CAPABILITY_LINK_TUNING, &rt2x00dev->cap_flags);
1544
* RF value list for RF2420 & RF2421
1547
static const struct rf_channel rf_vals_b[] = {
1548
{ 1, 0x00022058, 0x000c1fda, 0x00000101, 0 },
1549
{ 2, 0x00022058, 0x000c1fee, 0x00000101, 0 },
1550
{ 3, 0x00022058, 0x000c2002, 0x00000101, 0 },
1551
{ 4, 0x00022058, 0x000c2016, 0x00000101, 0 },
1552
{ 5, 0x00022058, 0x000c202a, 0x00000101, 0 },
1553
{ 6, 0x00022058, 0x000c203e, 0x00000101, 0 },
1554
{ 7, 0x00022058, 0x000c2052, 0x00000101, 0 },
1555
{ 8, 0x00022058, 0x000c2066, 0x00000101, 0 },
1556
{ 9, 0x00022058, 0x000c207a, 0x00000101, 0 },
1557
{ 10, 0x00022058, 0x000c208e, 0x00000101, 0 },
1558
{ 11, 0x00022058, 0x000c20a2, 0x00000101, 0 },
1559
{ 12, 0x00022058, 0x000c20b6, 0x00000101, 0 },
1560
{ 13, 0x00022058, 0x000c20ca, 0x00000101, 0 },
1561
{ 14, 0x00022058, 0x000c20fa, 0x00000101, 0 },
1564
static int rt2400pci_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
1566
struct hw_mode_spec *spec = &rt2x00dev->spec;
1567
struct channel_info *info;
1572
* Initialize all hw fields.
1574
rt2x00dev->hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1575
IEEE80211_HW_SIGNAL_DBM |
1576
IEEE80211_HW_SUPPORTS_PS |
1577
IEEE80211_HW_PS_NULLFUNC_STACK;
1579
SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->dev);
1580
SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
1581
rt2x00_eeprom_addr(rt2x00dev,
1582
EEPROM_MAC_ADDR_0));
1585
* Initialize hw_mode information.
1587
spec->supported_bands = SUPPORT_BAND_2GHZ;
1588
spec->supported_rates = SUPPORT_RATE_CCK;
1590
spec->num_channels = ARRAY_SIZE(rf_vals_b);
1591
spec->channels = rf_vals_b;
1594
* Create channel information array
1596
info = kcalloc(spec->num_channels, sizeof(*info), GFP_KERNEL);
1600
spec->channels_info = info;
1602
tx_power = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_START);
1603
for (i = 0; i < 14; i++) {
1604
info[i].max_power = TXPOWER_FROM_DEV(MAX_TXPOWER);
1605
info[i].default_power1 = TXPOWER_FROM_DEV(tx_power[i]);
1611
static int rt2400pci_probe_hw(struct rt2x00_dev *rt2x00dev)
1616
* Allocate eeprom data.
1618
retval = rt2400pci_validate_eeprom(rt2x00dev);
1622
retval = rt2400pci_init_eeprom(rt2x00dev);
1627
* Initialize hw specifications.
1629
retval = rt2400pci_probe_hw_mode(rt2x00dev);
1634
* This device requires the atim queue and DMA-mapped skbs.
1636
__set_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags);
1637
__set_bit(REQUIRE_DMA, &rt2x00dev->cap_flags);
1638
__set_bit(REQUIRE_SW_SEQNO, &rt2x00dev->cap_flags);
1641
* Set the rssi offset.
1643
rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;
1649
* IEEE80211 stack callback functions.
1651
static int rt2400pci_conf_tx(struct ieee80211_hw *hw,
1652
struct ieee80211_vif *vif, u16 queue,
1653
const struct ieee80211_tx_queue_params *params)
1655
struct rt2x00_dev *rt2x00dev = hw->priv;
1658
* We don't support variating cw_min and cw_max variables
1659
* per queue. So by default we only configure the TX queue,
1660
* and ignore all other configurations.
1665
if (rt2x00mac_conf_tx(hw, vif, queue, params))
1669
* Write configuration to register.
1671
rt2400pci_config_cw(rt2x00dev,
1672
rt2x00dev->tx->cw_min, rt2x00dev->tx->cw_max);
1677
static u64 rt2400pci_get_tsf(struct ieee80211_hw *hw,
1678
struct ieee80211_vif *vif)
1680
struct rt2x00_dev *rt2x00dev = hw->priv;
1684
rt2x00pci_register_read(rt2x00dev, CSR17, ®);
1685
tsf = (u64) rt2x00_get_field32(reg, CSR17_HIGH_TSFTIMER) << 32;
1686
rt2x00pci_register_read(rt2x00dev, CSR16, ®);
1687
tsf |= rt2x00_get_field32(reg, CSR16_LOW_TSFTIMER);
1692
static int rt2400pci_tx_last_beacon(struct ieee80211_hw *hw)
1694
struct rt2x00_dev *rt2x00dev = hw->priv;
1697
rt2x00pci_register_read(rt2x00dev, CSR15, ®);
1698
return rt2x00_get_field32(reg, CSR15_BEACON_SENT);
1701
static const struct ieee80211_ops rt2400pci_mac80211_ops = {
1703
.start = rt2x00mac_start,
1704
.stop = rt2x00mac_stop,
1705
.add_interface = rt2x00mac_add_interface,
1706
.remove_interface = rt2x00mac_remove_interface,
1707
.config = rt2x00mac_config,
1708
.configure_filter = rt2x00mac_configure_filter,
1709
.sw_scan_start = rt2x00mac_sw_scan_start,
1710
.sw_scan_complete = rt2x00mac_sw_scan_complete,
1711
.get_stats = rt2x00mac_get_stats,
1712
.bss_info_changed = rt2x00mac_bss_info_changed,
1713
.conf_tx = rt2400pci_conf_tx,
1714
.get_tsf = rt2400pci_get_tsf,
1715
.tx_last_beacon = rt2400pci_tx_last_beacon,
1716
.rfkill_poll = rt2x00mac_rfkill_poll,
1717
.flush = rt2x00mac_flush,
1718
.set_antenna = rt2x00mac_set_antenna,
1719
.get_antenna = rt2x00mac_get_antenna,
1720
.get_ringparam = rt2x00mac_get_ringparam,
1721
.tx_frames_pending = rt2x00mac_tx_frames_pending,
1724
static const struct rt2x00lib_ops rt2400pci_rt2x00_ops = {
1725
.irq_handler = rt2400pci_interrupt,
1726
.txstatus_tasklet = rt2400pci_txstatus_tasklet,
1727
.tbtt_tasklet = rt2400pci_tbtt_tasklet,
1728
.rxdone_tasklet = rt2400pci_rxdone_tasklet,
1729
.probe_hw = rt2400pci_probe_hw,
1730
.initialize = rt2x00pci_initialize,
1731
.uninitialize = rt2x00pci_uninitialize,
1732
.get_entry_state = rt2400pci_get_entry_state,
1733
.clear_entry = rt2400pci_clear_entry,
1734
.set_device_state = rt2400pci_set_device_state,
1735
.rfkill_poll = rt2400pci_rfkill_poll,
1736
.link_stats = rt2400pci_link_stats,
1737
.reset_tuner = rt2400pci_reset_tuner,
1738
.link_tuner = rt2400pci_link_tuner,
1739
.start_queue = rt2400pci_start_queue,
1740
.kick_queue = rt2400pci_kick_queue,
1741
.stop_queue = rt2400pci_stop_queue,
1742
.flush_queue = rt2x00pci_flush_queue,
1743
.write_tx_desc = rt2400pci_write_tx_desc,
1744
.write_beacon = rt2400pci_write_beacon,
1745
.fill_rxdone = rt2400pci_fill_rxdone,
1746
.config_filter = rt2400pci_config_filter,
1747
.config_intf = rt2400pci_config_intf,
1748
.config_erp = rt2400pci_config_erp,
1749
.config_ant = rt2400pci_config_ant,
1750
.config = rt2400pci_config,
1753
static const struct data_queue_desc rt2400pci_queue_rx = {
1755
.data_size = DATA_FRAME_SIZE,
1756
.desc_size = RXD_DESC_SIZE,
1757
.priv_size = sizeof(struct queue_entry_priv_pci),
1760
static const struct data_queue_desc rt2400pci_queue_tx = {
1762
.data_size = DATA_FRAME_SIZE,
1763
.desc_size = TXD_DESC_SIZE,
1764
.priv_size = sizeof(struct queue_entry_priv_pci),
1767
static const struct data_queue_desc rt2400pci_queue_bcn = {
1769
.data_size = MGMT_FRAME_SIZE,
1770
.desc_size = TXD_DESC_SIZE,
1771
.priv_size = sizeof(struct queue_entry_priv_pci),
1774
static const struct data_queue_desc rt2400pci_queue_atim = {
1776
.data_size = DATA_FRAME_SIZE,
1777
.desc_size = TXD_DESC_SIZE,
1778
.priv_size = sizeof(struct queue_entry_priv_pci),
1781
static const struct rt2x00_ops rt2400pci_ops = {
1782
.name = KBUILD_MODNAME,
1785
.eeprom_size = EEPROM_SIZE,
1787
.tx_queues = NUM_TX_QUEUES,
1788
.extra_tx_headroom = 0,
1789
.rx = &rt2400pci_queue_rx,
1790
.tx = &rt2400pci_queue_tx,
1791
.bcn = &rt2400pci_queue_bcn,
1792
.atim = &rt2400pci_queue_atim,
1793
.lib = &rt2400pci_rt2x00_ops,
1794
.hw = &rt2400pci_mac80211_ops,
1795
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
1796
.debugfs = &rt2400pci_rt2x00debug,
1797
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1801
* RT2400pci module information.
1803
static DEFINE_PCI_DEVICE_TABLE(rt2400pci_device_table) = {
1804
{ PCI_DEVICE(0x1814, 0x0101) },
1809
MODULE_AUTHOR(DRV_PROJECT);
1810
MODULE_VERSION(DRV_VERSION);
1811
MODULE_DESCRIPTION("Ralink RT2400 PCI & PCMCIA Wireless LAN driver.");
1812
MODULE_SUPPORTED_DEVICE("Ralink RT2460 PCI & PCMCIA chipset based cards");
1813
MODULE_DEVICE_TABLE(pci, rt2400pci_device_table);
1814
MODULE_LICENSE("GPL");
1816
static int rt2400pci_probe(struct pci_dev *pci_dev,
1817
const struct pci_device_id *id)
1819
return rt2x00pci_probe(pci_dev, &rt2400pci_ops);
1822
static struct pci_driver rt2400pci_driver = {
1823
.name = KBUILD_MODNAME,
1824
.id_table = rt2400pci_device_table,
1825
.probe = rt2400pci_probe,
1826
.remove = __devexit_p(rt2x00pci_remove),
1827
.suspend = rt2x00pci_suspend,
1828
.resume = rt2x00pci_resume,
1831
static int __init rt2400pci_init(void)
1833
return pci_register_driver(&rt2400pci_driver);
1836
static void __exit rt2400pci_exit(void)
1838
pci_unregister_driver(&rt2400pci_driver);
1841
module_init(rt2400pci_init);
1842
module_exit(rt2400pci_exit);