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rt2500pci.c
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rt2500pci.c
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/*
Copyright (C) 2004 - 2009 Ivo van Doorn <[email protected]>
<http://rt2x00.serialmonkey.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
Module: rt2500pci
Abstract: rt2500pci device specific routines.
Supported chipsets: RT2560.
*/
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/eeprom_93cx6.h>
#include <linux/slab.h>
#include "rt2x00.h"
#include "rt2x00pci.h"
#include "rt2500pci.h"
/*
* Register access.
* All access to the CSR registers will go through the methods
* rt2x00pci_register_read and rt2x00pci_register_write.
* BBP and RF register require indirect register access,
* and use the CSR registers BBPCSR and RFCSR to achieve this.
* These indirect registers work with busy bits,
* and we will try maximal REGISTER_BUSY_COUNT times to access
* the register while taking a REGISTER_BUSY_DELAY us delay
* between each attampt. When the busy bit is still set at that time,
* the access attempt is considered to have failed,
* and we will print an error.
*/
#define WAIT_FOR_BBP(__dev, __reg) \
rt2x00pci_regbusy_read((__dev), BBPCSR, BBPCSR_BUSY, (__reg))
#define WAIT_FOR_RF(__dev, __reg) \
rt2x00pci_regbusy_read((__dev), RFCSR, RFCSR_BUSY, (__reg))
static void rt2500pci_bbp_write(struct rt2x00_dev *rt2x00dev,
const unsigned int word, const u8 value)
{
u32 reg;
mutex_lock(&rt2x00dev->csr_mutex);
/*
* Wait until the BBP becomes available, afterwards we
* can safely write the new data into the register.
*/
if (WAIT_FOR_BBP(rt2x00dev, ®)) {
reg = 0;
rt2x00_set_field32(®, BBPCSR_VALUE, value);
rt2x00_set_field32(®, BBPCSR_REGNUM, word);
rt2x00_set_field32(®, BBPCSR_BUSY, 1);
rt2x00_set_field32(®, BBPCSR_WRITE_CONTROL, 1);
rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);
}
mutex_unlock(&rt2x00dev->csr_mutex);
}
static void rt2500pci_bbp_read(struct rt2x00_dev *rt2x00dev,
const unsigned int word, u8 *value)
{
u32 reg;
mutex_lock(&rt2x00dev->csr_mutex);
/*
* Wait until the BBP becomes available, afterwards we
* can safely write the read request into the register.
* After the data has been written, we wait until hardware
* returns the correct value, if at any time the register
* doesn't become available in time, reg will be 0xffffffff
* which means we return 0xff to the caller.
*/
if (WAIT_FOR_BBP(rt2x00dev, ®)) {
reg = 0;
rt2x00_set_field32(®, BBPCSR_REGNUM, word);
rt2x00_set_field32(®, BBPCSR_BUSY, 1);
rt2x00_set_field32(®, BBPCSR_WRITE_CONTROL, 0);
rt2x00pci_register_write(rt2x00dev, BBPCSR, reg);
WAIT_FOR_BBP(rt2x00dev, ®);
}
*value = rt2x00_get_field32(reg, BBPCSR_VALUE);
mutex_unlock(&rt2x00dev->csr_mutex);
}
static void rt2500pci_rf_write(struct rt2x00_dev *rt2x00dev,
const unsigned int word, const u32 value)
{
u32 reg;
mutex_lock(&rt2x00dev->csr_mutex);
/*
* Wait until the RF becomes available, afterwards we
* can safely write the new data into the register.
*/
if (WAIT_FOR_RF(rt2x00dev, ®)) {
reg = 0;
rt2x00_set_field32(®, RFCSR_VALUE, value);
rt2x00_set_field32(®, RFCSR_NUMBER_OF_BITS, 20);
rt2x00_set_field32(®, RFCSR_IF_SELECT, 0);
rt2x00_set_field32(®, RFCSR_BUSY, 1);
rt2x00pci_register_write(rt2x00dev, RFCSR, reg);
rt2x00_rf_write(rt2x00dev, word, value);
}
mutex_unlock(&rt2x00dev->csr_mutex);
}
static void rt2500pci_eepromregister_read(struct eeprom_93cx6 *eeprom)
{
struct rt2x00_dev *rt2x00dev = eeprom->data;
u32 reg;
rt2x00pci_register_read(rt2x00dev, CSR21, ®);
eeprom->reg_data_in = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_IN);
eeprom->reg_data_out = !!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_OUT);
eeprom->reg_data_clock =
!!rt2x00_get_field32(reg, CSR21_EEPROM_DATA_CLOCK);
eeprom->reg_chip_select =
!!rt2x00_get_field32(reg, CSR21_EEPROM_CHIP_SELECT);
}
static void rt2500pci_eepromregister_write(struct eeprom_93cx6 *eeprom)
{
struct rt2x00_dev *rt2x00dev = eeprom->data;
u32 reg = 0;
rt2x00_set_field32(®, CSR21_EEPROM_DATA_IN, !!eeprom->reg_data_in);
rt2x00_set_field32(®, CSR21_EEPROM_DATA_OUT, !!eeprom->reg_data_out);
rt2x00_set_field32(®, CSR21_EEPROM_DATA_CLOCK,
!!eeprom->reg_data_clock);
rt2x00_set_field32(®, CSR21_EEPROM_CHIP_SELECT,
!!eeprom->reg_chip_select);
rt2x00pci_register_write(rt2x00dev, CSR21, reg);
}
#ifdef CONFIG_RT2X00_LIB_DEBUGFS
static const struct rt2x00debug rt2500pci_rt2x00debug = {
.owner = THIS_MODULE,
.csr = {
.read = rt2x00pci_register_read,
.write = rt2x00pci_register_write,
.flags = RT2X00DEBUGFS_OFFSET,
.word_base = CSR_REG_BASE,
.word_size = sizeof(u32),
.word_count = CSR_REG_SIZE / sizeof(u32),
},
.eeprom = {
.read = rt2x00_eeprom_read,
.write = rt2x00_eeprom_write,
.word_base = EEPROM_BASE,
.word_size = sizeof(u16),
.word_count = EEPROM_SIZE / sizeof(u16),
},
.bbp = {
.read = rt2500pci_bbp_read,
.write = rt2500pci_bbp_write,
.word_base = BBP_BASE,
.word_size = sizeof(u8),
.word_count = BBP_SIZE / sizeof(u8),
},
.rf = {
.read = rt2x00_rf_read,
.write = rt2500pci_rf_write,
.word_base = RF_BASE,
.word_size = sizeof(u32),
.word_count = RF_SIZE / sizeof(u32),
},
};
#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
static int rt2500pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
{
u32 reg;
rt2x00pci_register_read(rt2x00dev, GPIOCSR, ®);
return rt2x00_get_field32(reg, GPIOCSR_BIT0);
}
#ifdef CONFIG_RT2X00_LIB_LEDS
static void rt2500pci_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct rt2x00_led *led =
container_of(led_cdev, struct rt2x00_led, led_dev);
unsigned int enabled = brightness != LED_OFF;
u32 reg;
rt2x00pci_register_read(led->rt2x00dev, LEDCSR, ®);
if (led->type == LED_TYPE_RADIO || led->type == LED_TYPE_ASSOC)
rt2x00_set_field32(®, LEDCSR_LINK, enabled);
else if (led->type == LED_TYPE_ACTIVITY)
rt2x00_set_field32(®, LEDCSR_ACTIVITY, enabled);
rt2x00pci_register_write(led->rt2x00dev, LEDCSR, reg);
}
static int rt2500pci_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct rt2x00_led *led =
container_of(led_cdev, struct rt2x00_led, led_dev);
u32 reg;
rt2x00pci_register_read(led->rt2x00dev, LEDCSR, ®);
rt2x00_set_field32(®, LEDCSR_ON_PERIOD, *delay_on);
rt2x00_set_field32(®, LEDCSR_OFF_PERIOD, *delay_off);
rt2x00pci_register_write(led->rt2x00dev, LEDCSR, reg);
return 0;
}
static void rt2500pci_init_led(struct rt2x00_dev *rt2x00dev,
struct rt2x00_led *led,
enum led_type type)
{
led->rt2x00dev = rt2x00dev;
led->type = type;
led->led_dev.brightness_set = rt2500pci_brightness_set;
led->led_dev.blink_set = rt2500pci_blink_set;
led->flags = LED_INITIALIZED;
}
#endif /* CONFIG_RT2X00_LIB_LEDS */
/*
* Configuration handlers.
*/
static void rt2500pci_config_filter(struct rt2x00_dev *rt2x00dev,
const unsigned int filter_flags)
{
u32 reg;
/*
* Start configuration steps.
* Note that the version error will always be dropped
* and broadcast frames will always be accepted since
* there is no filter for it at this time.
*/
rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
rt2x00_set_field32(®, RXCSR0_DROP_CRC,
!(filter_flags & FIF_FCSFAIL));
rt2x00_set_field32(®, RXCSR0_DROP_PHYSICAL,
!(filter_flags & FIF_PLCPFAIL));
rt2x00_set_field32(®, RXCSR0_DROP_CONTROL,
!(filter_flags & FIF_CONTROL));
rt2x00_set_field32(®, RXCSR0_DROP_NOT_TO_ME,
!(filter_flags & FIF_PROMISC_IN_BSS));
rt2x00_set_field32(®, RXCSR0_DROP_TODS,
!(filter_flags & FIF_PROMISC_IN_BSS) &&
!rt2x00dev->intf_ap_count);
rt2x00_set_field32(®, RXCSR0_DROP_VERSION_ERROR, 1);
rt2x00_set_field32(®, RXCSR0_DROP_MCAST,
!(filter_flags & FIF_ALLMULTI));
rt2x00_set_field32(®, RXCSR0_DROP_BCAST, 0);
rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
}
static void rt2500pci_config_intf(struct rt2x00_dev *rt2x00dev,
struct rt2x00_intf *intf,
struct rt2x00intf_conf *conf,
const unsigned int flags)
{
struct data_queue *queue = rt2x00dev->bcn;
unsigned int bcn_preload;
u32 reg;
if (flags & CONFIG_UPDATE_TYPE) {
/*
* Enable beacon config
*/
bcn_preload = PREAMBLE + GET_DURATION(IEEE80211_HEADER, 20);
rt2x00pci_register_read(rt2x00dev, BCNCSR1, ®);
rt2x00_set_field32(®, BCNCSR1_PRELOAD, bcn_preload);
rt2x00_set_field32(®, BCNCSR1_BEACON_CWMIN, queue->cw_min);
rt2x00pci_register_write(rt2x00dev, BCNCSR1, reg);
/*
* Enable synchronisation.
*/
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
rt2x00_set_field32(®, CSR14_TSF_SYNC, conf->sync);
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
}
if (flags & CONFIG_UPDATE_MAC)
rt2x00pci_register_multiwrite(rt2x00dev, CSR3,
conf->mac, sizeof(conf->mac));
if (flags & CONFIG_UPDATE_BSSID)
rt2x00pci_register_multiwrite(rt2x00dev, CSR5,
conf->bssid, sizeof(conf->bssid));
}
static void rt2500pci_config_erp(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_erp *erp,
u32 changed)
{
int preamble_mask;
u32 reg;
/*
* When short preamble is enabled, we should set bit 0x08
*/
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
preamble_mask = erp->short_preamble << 3;
rt2x00pci_register_read(rt2x00dev, TXCSR1, ®);
rt2x00_set_field32(®, TXCSR1_ACK_TIMEOUT, 0x162);
rt2x00_set_field32(®, TXCSR1_ACK_CONSUME_TIME, 0xa2);
rt2x00_set_field32(®, TXCSR1_TSF_OFFSET, IEEE80211_HEADER);
rt2x00_set_field32(®, TXCSR1_AUTORESPONDER, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR1, reg);
rt2x00pci_register_read(rt2x00dev, ARCSR2, ®);
rt2x00_set_field32(®, ARCSR2_SIGNAL, 0x00);
rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04);
rt2x00_set_field32(®, ARCSR2_LENGTH,
GET_DURATION(ACK_SIZE, 10));
rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);
rt2x00pci_register_read(rt2x00dev, ARCSR3, ®);
rt2x00_set_field32(®, ARCSR3_SIGNAL, 0x01 | preamble_mask);
rt2x00_set_field32(®, ARCSR3_SERVICE, 0x04);
rt2x00_set_field32(®, ARCSR2_LENGTH,
GET_DURATION(ACK_SIZE, 20));
rt2x00pci_register_write(rt2x00dev, ARCSR3, reg);
rt2x00pci_register_read(rt2x00dev, ARCSR4, ®);
rt2x00_set_field32(®, ARCSR4_SIGNAL, 0x02 | preamble_mask);
rt2x00_set_field32(®, ARCSR4_SERVICE, 0x04);
rt2x00_set_field32(®, ARCSR2_LENGTH,
GET_DURATION(ACK_SIZE, 55));
rt2x00pci_register_write(rt2x00dev, ARCSR4, reg);
rt2x00pci_register_read(rt2x00dev, ARCSR5, ®);
rt2x00_set_field32(®, ARCSR5_SIGNAL, 0x03 | preamble_mask);
rt2x00_set_field32(®, ARCSR5_SERVICE, 0x84);
rt2x00_set_field32(®, ARCSR2_LENGTH,
GET_DURATION(ACK_SIZE, 110));
rt2x00pci_register_write(rt2x00dev, ARCSR5, reg);
}
if (changed & BSS_CHANGED_BASIC_RATES)
rt2x00pci_register_write(rt2x00dev, ARCSR1, erp->basic_rates);
if (changed & BSS_CHANGED_ERP_SLOT) {
rt2x00pci_register_read(rt2x00dev, CSR11, ®);
rt2x00_set_field32(®, CSR11_SLOT_TIME, erp->slot_time);
rt2x00pci_register_write(rt2x00dev, CSR11, reg);
rt2x00pci_register_read(rt2x00dev, CSR18, ®);
rt2x00_set_field32(®, CSR18_SIFS, erp->sifs);
rt2x00_set_field32(®, CSR18_PIFS, erp->pifs);
rt2x00pci_register_write(rt2x00dev, CSR18, reg);
rt2x00pci_register_read(rt2x00dev, CSR19, ®);
rt2x00_set_field32(®, CSR19_DIFS, erp->difs);
rt2x00_set_field32(®, CSR19_EIFS, erp->eifs);
rt2x00pci_register_write(rt2x00dev, CSR19, reg);
}
if (changed & BSS_CHANGED_BEACON_INT) {
rt2x00pci_register_read(rt2x00dev, CSR12, ®);
rt2x00_set_field32(®, CSR12_BEACON_INTERVAL,
erp->beacon_int * 16);
rt2x00_set_field32(®, CSR12_CFP_MAX_DURATION,
erp->beacon_int * 16);
rt2x00pci_register_write(rt2x00dev, CSR12, reg);
}
}
static void rt2500pci_config_ant(struct rt2x00_dev *rt2x00dev,
struct antenna_setup *ant)
{
u32 reg;
u8 r14;
u8 r2;
/*
* We should never come here because rt2x00lib is supposed
* to catch this and send us the correct antenna explicitely.
*/
BUG_ON(ant->rx == ANTENNA_SW_DIVERSITY ||
ant->tx == ANTENNA_SW_DIVERSITY);
rt2x00pci_register_read(rt2x00dev, BBPCSR1, ®);
rt2500pci_bbp_read(rt2x00dev, 14, &r14);
rt2500pci_bbp_read(rt2x00dev, 2, &r2);
/*
* Configure the TX antenna.
*/
switch (ant->tx) {
case ANTENNA_A:
rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
rt2x00_set_field32(®, BBPCSR1_CCK, 0);
rt2x00_set_field32(®, BBPCSR1_OFDM, 0);
break;
case ANTENNA_B:
default:
rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
rt2x00_set_field32(®, BBPCSR1_CCK, 2);
rt2x00_set_field32(®, BBPCSR1_OFDM, 2);
break;
}
/*
* Configure the RX antenna.
*/
switch (ant->rx) {
case ANTENNA_A:
rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
break;
case ANTENNA_B:
default:
rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 2);
break;
}
/*
* RT2525E and RT5222 need to flip TX I/Q
*/
if (rt2x00_rf(rt2x00dev, RF2525E) || rt2x00_rf(rt2x00dev, RF5222)) {
rt2x00_set_field8(&r2, BBP_R2_TX_IQ_FLIP, 1);
rt2x00_set_field32(®, BBPCSR1_CCK_FLIP, 1);
rt2x00_set_field32(®, BBPCSR1_OFDM_FLIP, 1);
/*
* RT2525E does not need RX I/Q Flip.
*/
if (rt2x00_rf(rt2x00dev, RF2525E))
rt2x00_set_field8(&r14, BBP_R14_RX_IQ_FLIP, 0);
} else {
rt2x00_set_field32(®, BBPCSR1_CCK_FLIP, 0);
rt2x00_set_field32(®, BBPCSR1_OFDM_FLIP, 0);
}
rt2x00pci_register_write(rt2x00dev, BBPCSR1, reg);
rt2500pci_bbp_write(rt2x00dev, 14, r14);
rt2500pci_bbp_write(rt2x00dev, 2, r2);
}
static void rt2500pci_config_channel(struct rt2x00_dev *rt2x00dev,
struct rf_channel *rf, const int txpower)
{
u8 r70;
/*
* Set TXpower.
*/
rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
/*
* Switch on tuning bits.
* For RT2523 devices we do not need to update the R1 register.
*/
if (!rt2x00_rf(rt2x00dev, RF2523))
rt2x00_set_field32(&rf->rf1, RF1_TUNER, 1);
rt2x00_set_field32(&rf->rf3, RF3_TUNER, 1);
/*
* For RT2525 we should first set the channel to half band higher.
*/
if (rt2x00_rf(rt2x00dev, RF2525)) {
static const u32 vals[] = {
0x00080cbe, 0x00080d02, 0x00080d06, 0x00080d0a,
0x00080d0e, 0x00080d12, 0x00080d16, 0x00080d1a,
0x00080d1e, 0x00080d22, 0x00080d26, 0x00080d2a,
0x00080d2e, 0x00080d3a
};
rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
rt2500pci_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
if (rf->rf4)
rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);
}
rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
rt2500pci_rf_write(rt2x00dev, 2, rf->rf2);
rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
if (rf->rf4)
rt2500pci_rf_write(rt2x00dev, 4, rf->rf4);
/*
* Channel 14 requires the Japan filter bit to be set.
*/
r70 = 0x46;
rt2x00_set_field8(&r70, BBP_R70_JAPAN_FILTER, rf->channel == 14);
rt2500pci_bbp_write(rt2x00dev, 70, r70);
msleep(1);
/*
* Switch off tuning bits.
* For RT2523 devices we do not need to update the R1 register.
*/
if (!rt2x00_rf(rt2x00dev, RF2523)) {
rt2x00_set_field32(&rf->rf1, RF1_TUNER, 0);
rt2500pci_rf_write(rt2x00dev, 1, rf->rf1);
}
rt2x00_set_field32(&rf->rf3, RF3_TUNER, 0);
rt2500pci_rf_write(rt2x00dev, 3, rf->rf3);
/*
* Clear false CRC during channel switch.
*/
rt2x00pci_register_read(rt2x00dev, CNT0, &rf->rf1);
}
static void rt2500pci_config_txpower(struct rt2x00_dev *rt2x00dev,
const int txpower)
{
u32 rf3;
rt2x00_rf_read(rt2x00dev, 3, &rf3);
rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
rt2500pci_rf_write(rt2x00dev, 3, rf3);
}
static void rt2500pci_config_retry_limit(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf)
{
u32 reg;
rt2x00pci_register_read(rt2x00dev, CSR11, ®);
rt2x00_set_field32(®, CSR11_LONG_RETRY,
libconf->conf->long_frame_max_tx_count);
rt2x00_set_field32(®, CSR11_SHORT_RETRY,
libconf->conf->short_frame_max_tx_count);
rt2x00pci_register_write(rt2x00dev, CSR11, reg);
}
static void rt2500pci_config_ps(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf)
{
enum dev_state state =
(libconf->conf->flags & IEEE80211_CONF_PS) ?
STATE_SLEEP : STATE_AWAKE;
u32 reg;
if (state == STATE_SLEEP) {
rt2x00pci_register_read(rt2x00dev, CSR20, ®);
rt2x00_set_field32(®, CSR20_DELAY_AFTER_TBCN,
(rt2x00dev->beacon_int - 20) * 16);
rt2x00_set_field32(®, CSR20_TBCN_BEFORE_WAKEUP,
libconf->conf->listen_interval - 1);
/* We must first disable autowake before it can be enabled */
rt2x00_set_field32(®, CSR20_AUTOWAKE, 0);
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
rt2x00_set_field32(®, CSR20_AUTOWAKE, 1);
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
} else {
rt2x00pci_register_read(rt2x00dev, CSR20, ®);
rt2x00_set_field32(®, CSR20_AUTOWAKE, 0);
rt2x00pci_register_write(rt2x00dev, CSR20, reg);
}
rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
}
static void rt2500pci_config(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf,
const unsigned int flags)
{
if (flags & IEEE80211_CONF_CHANGE_CHANNEL)
rt2500pci_config_channel(rt2x00dev, &libconf->rf,
libconf->conf->power_level);
if ((flags & IEEE80211_CONF_CHANGE_POWER) &&
!(flags & IEEE80211_CONF_CHANGE_CHANNEL))
rt2500pci_config_txpower(rt2x00dev,
libconf->conf->power_level);
if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
rt2500pci_config_retry_limit(rt2x00dev, libconf);
if (flags & IEEE80211_CONF_CHANGE_PS)
rt2500pci_config_ps(rt2x00dev, libconf);
}
/*
* Link tuning
*/
static void rt2500pci_link_stats(struct rt2x00_dev *rt2x00dev,
struct link_qual *qual)
{
u32 reg;
/*
* Update FCS error count from register.
*/
rt2x00pci_register_read(rt2x00dev, CNT0, ®);
qual->rx_failed = rt2x00_get_field32(reg, CNT0_FCS_ERROR);
/*
* Update False CCA count from register.
*/
rt2x00pci_register_read(rt2x00dev, CNT3, ®);
qual->false_cca = rt2x00_get_field32(reg, CNT3_FALSE_CCA);
}
static inline void rt2500pci_set_vgc(struct rt2x00_dev *rt2x00dev,
struct link_qual *qual, u8 vgc_level)
{
if (qual->vgc_level_reg != vgc_level) {
rt2500pci_bbp_write(rt2x00dev, 17, vgc_level);
qual->vgc_level = vgc_level;
qual->vgc_level_reg = vgc_level;
}
}
static void rt2500pci_reset_tuner(struct rt2x00_dev *rt2x00dev,
struct link_qual *qual)
{
rt2500pci_set_vgc(rt2x00dev, qual, 0x48);
}
static void rt2500pci_link_tuner(struct rt2x00_dev *rt2x00dev,
struct link_qual *qual, const u32 count)
{
/*
* To prevent collisions with MAC ASIC on chipsets
* up to version C the link tuning should halt after 20
* seconds while being associated.
*/
if (rt2x00_rev(rt2x00dev) < RT2560_VERSION_D &&
rt2x00dev->intf_associated && count > 20)
return;
/*
* Chipset versions C and lower should directly continue
* to the dynamic CCA tuning. Chipset version D and higher
* should go straight to dynamic CCA tuning when they
* are not associated.
*/
if (rt2x00_rev(rt2x00dev) < RT2560_VERSION_D ||
!rt2x00dev->intf_associated)
goto dynamic_cca_tune;
/*
* A too low RSSI will cause too much false CCA which will
* then corrupt the R17 tuning. To remidy this the tuning should
* be stopped (While making sure the R17 value will not exceed limits)
*/
if (qual->rssi < -80 && count > 20) {
if (qual->vgc_level_reg >= 0x41)
rt2500pci_set_vgc(rt2x00dev, qual, qual->vgc_level);
return;
}
/*
* Special big-R17 for short distance
*/
if (qual->rssi >= -58) {
rt2500pci_set_vgc(rt2x00dev, qual, 0x50);
return;
}
/*
* Special mid-R17 for middle distance
*/
if (qual->rssi >= -74) {
rt2500pci_set_vgc(rt2x00dev, qual, 0x41);
return;
}
/*
* Leave short or middle distance condition, restore r17
* to the dynamic tuning range.
*/
if (qual->vgc_level_reg >= 0x41) {
rt2500pci_set_vgc(rt2x00dev, qual, qual->vgc_level);
return;
}
dynamic_cca_tune:
/*
* R17 is inside the dynamic tuning range,
* start tuning the link based on the false cca counter.
*/
if (qual->false_cca > 512 && qual->vgc_level_reg < 0x40)
rt2500pci_set_vgc(rt2x00dev, qual, ++qual->vgc_level_reg);
else if (qual->false_cca < 100 && qual->vgc_level_reg > 0x32)
rt2500pci_set_vgc(rt2x00dev, qual, --qual->vgc_level_reg);
}
/*
* Queue handlers.
*/
static void rt2500pci_start_queue(struct data_queue *queue)
{
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
u32 reg;
switch (queue->qid) {
case QID_RX:
rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
rt2x00_set_field32(®, RXCSR0_DISABLE_RX, 0);
rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
break;
case QID_BEACON:
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
rt2x00_set_field32(®, CSR14_TSF_COUNT, 1);
rt2x00_set_field32(®, CSR14_TBCN, 1);
rt2x00_set_field32(®, CSR14_BEACON_GEN, 1);
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
break;
default:
break;
}
}
static void rt2500pci_kick_queue(struct data_queue *queue)
{
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
u32 reg;
switch (queue->qid) {
case QID_AC_VO:
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
rt2x00_set_field32(®, TXCSR0_KICK_PRIO, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
break;
case QID_AC_VI:
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
rt2x00_set_field32(®, TXCSR0_KICK_TX, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
break;
case QID_ATIM:
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
rt2x00_set_field32(®, TXCSR0_KICK_ATIM, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
break;
default:
break;
}
}
static void rt2500pci_stop_queue(struct data_queue *queue)
{
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
u32 reg;
switch (queue->qid) {
case QID_AC_VO:
case QID_AC_VI:
case QID_ATIM:
rt2x00pci_register_read(rt2x00dev, TXCSR0, ®);
rt2x00_set_field32(®, TXCSR0_ABORT, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR0, reg);
break;
case QID_RX:
rt2x00pci_register_read(rt2x00dev, RXCSR0, ®);
rt2x00_set_field32(®, RXCSR0_DISABLE_RX, 1);
rt2x00pci_register_write(rt2x00dev, RXCSR0, reg);
break;
case QID_BEACON:
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
rt2x00_set_field32(®, CSR14_TSF_COUNT, 0);
rt2x00_set_field32(®, CSR14_TBCN, 0);
rt2x00_set_field32(®, CSR14_BEACON_GEN, 0);
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
/*
* Wait for possibly running tbtt tasklets.
*/
tasklet_kill(&rt2x00dev->tbtt_tasklet);
break;
default:
break;
}
}
/*
* Initialization functions.
*/
static bool rt2500pci_get_entry_state(struct queue_entry *entry)
{
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
u32 word;
if (entry->queue->qid == QID_RX) {
rt2x00_desc_read(entry_priv->desc, 0, &word);
return rt2x00_get_field32(word, RXD_W0_OWNER_NIC);
} else {
rt2x00_desc_read(entry_priv->desc, 0, &word);
return (rt2x00_get_field32(word, TXD_W0_OWNER_NIC) ||
rt2x00_get_field32(word, TXD_W0_VALID));
}
}
static void rt2500pci_clear_entry(struct queue_entry *entry)
{
struct queue_entry_priv_pci *entry_priv = entry->priv_data;
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
u32 word;
if (entry->queue->qid == QID_RX) {
rt2x00_desc_read(entry_priv->desc, 1, &word);
rt2x00_set_field32(&word, RXD_W1_BUFFER_ADDRESS, skbdesc->skb_dma);
rt2x00_desc_write(entry_priv->desc, 1, word);
rt2x00_desc_read(entry_priv->desc, 0, &word);
rt2x00_set_field32(&word, RXD_W0_OWNER_NIC, 1);
rt2x00_desc_write(entry_priv->desc, 0, word);
} else {
rt2x00_desc_read(entry_priv->desc, 0, &word);
rt2x00_set_field32(&word, TXD_W0_VALID, 0);
rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 0);
rt2x00_desc_write(entry_priv->desc, 0, word);
}
}
static int rt2500pci_init_queues(struct rt2x00_dev *rt2x00dev)
{
struct queue_entry_priv_pci *entry_priv;
u32 reg;
/*
* Initialize registers.
*/
rt2x00pci_register_read(rt2x00dev, TXCSR2, ®);
rt2x00_set_field32(®, TXCSR2_TXD_SIZE, rt2x00dev->tx[0].desc_size);
rt2x00_set_field32(®, TXCSR2_NUM_TXD, rt2x00dev->tx[1].limit);
rt2x00_set_field32(®, TXCSR2_NUM_ATIM, rt2x00dev->atim->limit);
rt2x00_set_field32(®, TXCSR2_NUM_PRIO, rt2x00dev->tx[0].limit);
rt2x00pci_register_write(rt2x00dev, TXCSR2, reg);
entry_priv = rt2x00dev->tx[1].entries[0].priv_data;
rt2x00pci_register_read(rt2x00dev, TXCSR3, ®);
rt2x00_set_field32(®, TXCSR3_TX_RING_REGISTER,
entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TXCSR3, reg);
entry_priv = rt2x00dev->tx[0].entries[0].priv_data;
rt2x00pci_register_read(rt2x00dev, TXCSR5, ®);
rt2x00_set_field32(®, TXCSR5_PRIO_RING_REGISTER,
entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TXCSR5, reg);
entry_priv = rt2x00dev->atim->entries[0].priv_data;
rt2x00pci_register_read(rt2x00dev, TXCSR4, ®);
rt2x00_set_field32(®, TXCSR4_ATIM_RING_REGISTER,
entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TXCSR4, reg);
entry_priv = rt2x00dev->bcn->entries[0].priv_data;
rt2x00pci_register_read(rt2x00dev, TXCSR6, ®);
rt2x00_set_field32(®, TXCSR6_BEACON_RING_REGISTER,
entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, TXCSR6, reg);
rt2x00pci_register_read(rt2x00dev, RXCSR1, ®);
rt2x00_set_field32(®, RXCSR1_RXD_SIZE, rt2x00dev->rx->desc_size);
rt2x00_set_field32(®, RXCSR1_NUM_RXD, rt2x00dev->rx->limit);
rt2x00pci_register_write(rt2x00dev, RXCSR1, reg);
entry_priv = rt2x00dev->rx->entries[0].priv_data;
rt2x00pci_register_read(rt2x00dev, RXCSR2, ®);
rt2x00_set_field32(®, RXCSR2_RX_RING_REGISTER,
entry_priv->desc_dma);
rt2x00pci_register_write(rt2x00dev, RXCSR2, reg);
return 0;
}
static int rt2500pci_init_registers(struct rt2x00_dev *rt2x00dev)
{
u32 reg;
rt2x00pci_register_write(rt2x00dev, PSCSR0, 0x00020002);
rt2x00pci_register_write(rt2x00dev, PSCSR1, 0x00000002);
rt2x00pci_register_write(rt2x00dev, PSCSR2, 0x00020002);
rt2x00pci_register_write(rt2x00dev, PSCSR3, 0x00000002);
rt2x00pci_register_read(rt2x00dev, TIMECSR, ®);
rt2x00_set_field32(®, TIMECSR_US_COUNT, 33);
rt2x00_set_field32(®, TIMECSR_US_64_COUNT, 63);
rt2x00_set_field32(®, TIMECSR_BEACON_EXPECT, 0);
rt2x00pci_register_write(rt2x00dev, TIMECSR, reg);
rt2x00pci_register_read(rt2x00dev, CSR9, ®);
rt2x00_set_field32(®, CSR9_MAX_FRAME_UNIT,
rt2x00dev->rx->data_size / 128);
rt2x00pci_register_write(rt2x00dev, CSR9, reg);
/*
* Always use CWmin and CWmax set in descriptor.
*/
rt2x00pci_register_read(rt2x00dev, CSR11, ®);
rt2x00_set_field32(®, CSR11_CW_SELECT, 0);
rt2x00pci_register_write(rt2x00dev, CSR11, reg);
rt2x00pci_register_read(rt2x00dev, CSR14, ®);
rt2x00_set_field32(®, CSR14_TSF_COUNT, 0);
rt2x00_set_field32(®, CSR14_TSF_SYNC, 0);
rt2x00_set_field32(®, CSR14_TBCN, 0);
rt2x00_set_field32(®, CSR14_TCFP, 0);
rt2x00_set_field32(®, CSR14_TATIMW, 0);
rt2x00_set_field32(®, CSR14_BEACON_GEN, 0);
rt2x00_set_field32(®, CSR14_CFP_COUNT_PRELOAD, 0);
rt2x00_set_field32(®, CSR14_TBCM_PRELOAD, 0);
rt2x00pci_register_write(rt2x00dev, CSR14, reg);
rt2x00pci_register_write(rt2x00dev, CNT3, 0);
rt2x00pci_register_read(rt2x00dev, TXCSR8, ®);
rt2x00_set_field32(®, TXCSR8_BBP_ID0, 10);
rt2x00_set_field32(®, TXCSR8_BBP_ID0_VALID, 1);
rt2x00_set_field32(®, TXCSR8_BBP_ID1, 11);
rt2x00_set_field32(®, TXCSR8_BBP_ID1_VALID, 1);
rt2x00_set_field32(®, TXCSR8_BBP_ID2, 13);
rt2x00_set_field32(®, TXCSR8_BBP_ID2_VALID, 1);
rt2x00_set_field32(®, TXCSR8_BBP_ID3, 12);
rt2x00_set_field32(®, TXCSR8_BBP_ID3_VALID, 1);
rt2x00pci_register_write(rt2x00dev, TXCSR8, reg);
rt2x00pci_register_read(rt2x00dev, ARTCSR0, ®);
rt2x00_set_field32(®, ARTCSR0_ACK_CTS_1MBS, 112);
rt2x00_set_field32(®, ARTCSR0_ACK_CTS_2MBS, 56);
rt2x00_set_field32(®, ARTCSR0_ACK_CTS_5_5MBS, 20);
rt2x00_set_field32(®, ARTCSR0_ACK_CTS_11MBS, 10);
rt2x00pci_register_write(rt2x00dev, ARTCSR0, reg);
rt2x00pci_register_read(rt2x00dev, ARTCSR1, ®);
rt2x00_set_field32(®, ARTCSR1_ACK_CTS_6MBS, 45);
rt2x00_set_field32(®, ARTCSR1_ACK_CTS_9MBS, 37);
rt2x00_set_field32(®, ARTCSR1_ACK_CTS_12MBS, 33);
rt2x00_set_field32(®, ARTCSR1_ACK_CTS_18MBS, 29);
rt2x00pci_register_write(rt2x00dev, ARTCSR1, reg);
rt2x00pci_register_read(rt2x00dev, ARTCSR2, ®);
rt2x00_set_field32(®, ARTCSR2_ACK_CTS_24MBS, 29);
rt2x00_set_field32(®, ARTCSR2_ACK_CTS_36MBS, 25);
rt2x00_set_field32(®, ARTCSR2_ACK_CTS_48MBS, 25);
rt2x00_set_field32(®, ARTCSR2_ACK_CTS_54MBS, 25);
rt2x00pci_register_write(rt2x00dev, ARTCSR2, reg);
rt2x00pci_register_read(rt2x00dev, RXCSR3, ®);
rt2x00_set_field32(®, RXCSR3_BBP_ID0, 47); /* CCK Signal */
rt2x00_set_field32(®, RXCSR3_BBP_ID0_VALID, 1);
rt2x00_set_field32(®, RXCSR3_BBP_ID1, 51); /* Rssi */
rt2x00_set_field32(®, RXCSR3_BBP_ID1_VALID, 1);
rt2x00_set_field32(®, RXCSR3_BBP_ID2, 42); /* OFDM Rate */
rt2x00_set_field32(®, RXCSR3_BBP_ID2_VALID, 1);
rt2x00_set_field32(®, RXCSR3_BBP_ID3, 51); /* RSSI */
rt2x00_set_field32(®, RXCSR3_BBP_ID3_VALID, 1);
rt2x00pci_register_write(rt2x00dev, RXCSR3, reg);
rt2x00pci_register_read(rt2x00dev, PCICSR, ®);
rt2x00_set_field32(®, PCICSR_BIG_ENDIAN, 0);
rt2x00_set_field32(®, PCICSR_RX_TRESHOLD, 0);
rt2x00_set_field32(®, PCICSR_TX_TRESHOLD, 3);
rt2x00_set_field32(®, PCICSR_BURST_LENTH, 1);
rt2x00_set_field32(®, PCICSR_ENABLE_CLK, 1);
rt2x00_set_field32(®, PCICSR_READ_MULTIPLE, 1);
rt2x00_set_field32(®, PCICSR_WRITE_INVALID, 1);
rt2x00pci_register_write(rt2x00dev, PCICSR, reg);
rt2x00pci_register_write(rt2x00dev, PWRCSR0, 0x3f3b3100);
rt2x00pci_register_write(rt2x00dev, GPIOCSR, 0x0000ff00);