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rt2x00:Add VCO recalibration 

Signed-off-by: John Li <chen-yang.li@mediatek.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
John Li 2012-02-16 21:40:57 +08:00 committed by John W. Linville
parent 9da2723206
commit 2e9c43dd45
10 changed files with 171 additions and 0 deletions
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9
drivers/net/wireless/rt2x00/rt2800.h
View File

@ -965,6 +965,7 @@
* TX_PIN_CFG:
*/
#define TX_PIN_CFG 0x1328
#define TX_PIN_CFG_PA_PE_DISABLE 0xfcfffff0
#define TX_PIN_CFG_PA_PE_A0_EN FIELD32(0x00000001)
#define TX_PIN_CFG_PA_PE_G0_EN FIELD32(0x00000002)
#define TX_PIN_CFG_PA_PE_A1_EN FIELD32(0x00000004)
@ -985,6 +986,14 @@
#define TX_PIN_CFG_RFTR_POL FIELD32(0x00020000)
#define TX_PIN_CFG_TRSW_EN FIELD32(0x00040000)
#define TX_PIN_CFG_TRSW_POL FIELD32(0x00080000)
#define TX_PIN_CFG_PA_PE_A2_EN FIELD32(0x01000000)
#define TX_PIN_CFG_PA_PE_G2_EN FIELD32(0x02000000)
#define TX_PIN_CFG_PA_PE_A2_POL FIELD32(0x04000000)
#define TX_PIN_CFG_PA_PE_G2_POL FIELD32(0x08000000)
#define TX_PIN_CFG_LNA_PE_A2_EN FIELD32(0x10000000)
#define TX_PIN_CFG_LNA_PE_G2_EN FIELD32(0x20000000)
#define TX_PIN_CFG_LNA_PE_A2_POL FIELD32(0x40000000)
#define TX_PIN_CFG_LNA_PE_G2_POL FIELD32(0x80000000)
/*
* TX_BAND_CFG: 0x1 use upper 20MHz, 0x0 use lower 20MHz

88
drivers/net/wireless/rt2x00/rt2800lib.c
View File

@ -2497,6 +2497,80 @@ void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev)
}
EXPORT_SYMBOL_GPL(rt2800_gain_calibration);
void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev)
{
u32 tx_pin;
u8 rfcsr;
/*
* A voltage-controlled oscillator(VCO) is an electronic oscillator
* designed to be controlled in oscillation frequency by a voltage
* input. Maybe the temperature will affect the frequency of
* oscillation to be shifted. The VCO calibration will be called
* periodically to adjust the frequency to be precision.
*/
rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
tx_pin &= TX_PIN_CFG_PA_PE_DISABLE;
rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);
switch (rt2x00dev->chip.rf) {
case RF2020:
case RF3020:
case RF3021:
case RF3022:
case RF3320:
case RF3052:
rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr);
rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1);
rt2800_rfcsr_write(rt2x00dev, 7, rfcsr);
break;
case RF5370:
case RF5372:
case RF5390:
rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr);
rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1);
rt2800_rfcsr_write(rt2x00dev, 3, rfcsr);
break;
default:
return;
}
mdelay(1);
rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin);
if (rt2x00dev->rf_channel <= 14) {
switch (rt2x00dev->default_ant.tx_chain_num) {
case 3:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G2_EN, 1);
/* fall through */
case 2:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G1_EN, 1);
/* fall through */
case 1:
default:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G0_EN, 1);
break;
}
} else {
switch (rt2x00dev->default_ant.tx_chain_num) {
case 3:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A2_EN, 1);
/* fall through */
case 2:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A1_EN, 1);
/* fall through */
case 1:
default:
rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A0_EN, 1);
break;
}
}
rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);
}
EXPORT_SYMBOL_GPL(rt2800_vco_calibration);
static void rt2800_config_retry_limit(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf)
{
@ -4451,6 +4525,20 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
}
}
switch (rt2x00dev->chip.rf) {
case RF2020:
case RF3020:
case RF3021:
case RF3022:
case RF3320:
case RF3052:
case RF5370:
case RF5372:
case RF5390:
__set_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags);
break;
}
return 0;
}
EXPORT_SYMBOL_GPL(rt2800_probe_hw_mode);

1
drivers/net/wireless/rt2x00/rt2800lib.h
View File

@ -184,6 +184,7 @@ void rt2800_reset_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual);
void rt2800_link_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual,
const u32 count);
void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev);
void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev);
int rt2800_enable_radio(struct rt2x00_dev *rt2x00dev);
void rt2800_disable_radio(struct rt2x00_dev *rt2x00dev);

1
drivers/net/wireless/rt2x00/rt2800pci.c
View File

@ -1050,6 +1050,7 @@ static const struct rt2x00lib_ops rt2800pci_rt2x00_ops = {
.reset_tuner = rt2800_reset_tuner,
.link_tuner = rt2800_link_tuner,
.gain_calibration = rt2800_gain_calibration,
.vco_calibration = rt2800_vco_calibration,
.start_queue = rt2800pci_start_queue,
.kick_queue = rt2800pci_kick_queue,
.stop_queue = rt2800pci_stop_queue,

1
drivers/net/wireless/rt2x00/rt2800usb.c
View File

@ -781,6 +781,7 @@ static const struct rt2x00lib_ops rt2800usb_rt2x00_ops = {
.reset_tuner = rt2800_reset_tuner,
.link_tuner = rt2800_link_tuner,
.gain_calibration = rt2800_gain_calibration,
.vco_calibration = rt2800_vco_calibration,
.watchdog = rt2800usb_watchdog,
.start_queue = rt2800usb_start_queue,
.kick_queue = rt2x00usb_kick_queue,

12
drivers/net/wireless/rt2x00/rt2x00.h
View File

@ -355,6 +355,11 @@ struct link {
* Work structure for scheduling periodic AGC adjustments.
*/
struct delayed_work agc_work;
/*
* Work structure for scheduling periodic VCO calibration.
*/
struct delayed_work vco_work;
};
enum rt2x00_delayed_flags {
@ -579,6 +584,7 @@ struct rt2x00lib_ops {
void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
struct link_qual *qual, const u32 count);
void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
/*
* Data queue handlers.
@ -722,6 +728,7 @@ enum rt2x00_capability_flags {
CAPABILITY_EXTERNAL_LNA_BG,
CAPABILITY_DOUBLE_ANTENNA,
CAPABILITY_BT_COEXIST,
CAPABILITY_VCO_RECALIBRATION,
};
/*
@ -977,6 +984,11 @@ struct rt2x00_dev {
struct tasklet_struct rxdone_tasklet;
struct tasklet_struct autowake_tasklet;
/*
* Used for VCO periodic calibration.
*/
int rf_channel;
/*
* Protect the interrupt mask register.
*/

3
drivers/net/wireless/rt2x00/rt2x00config.c
View File

@ -232,6 +232,9 @@ void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
memcpy(&libconf.channel,
&rt2x00dev->spec.channels_info[hw_value],
sizeof(libconf.channel));
/* Used for VCO periodic calibration */
rt2x00dev->rf_channel = libconf.rf.channel;
}
if (test_bit(REQUIRE_PS_AUTOWAKE, &rt2x00dev->cap_flags) &&

4
drivers/net/wireless/rt2x00/rt2x00dev.c
View File

@ -88,6 +88,8 @@ int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
rt2x00queue_start_queues(rt2x00dev);
rt2x00link_start_tuner(rt2x00dev);
rt2x00link_start_agc(rt2x00dev);
if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags))
rt2x00link_start_vcocal(rt2x00dev);
/*
* Start watchdog monitoring.
@ -111,6 +113,8 @@ void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
* Stop all queues
*/
rt2x00link_stop_agc(rt2x00dev);
if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags))
rt2x00link_stop_vcocal(rt2x00dev);
rt2x00link_stop_tuner(rt2x00dev);
rt2x00queue_stop_queues(rt2x00dev);
rt2x00queue_flush_queues(rt2x00dev, true);

13
drivers/net/wireless/rt2x00/rt2x00lib.h
View File

@ -33,6 +33,7 @@
#define WATCHDOG_INTERVAL round_jiffies_relative(HZ)
#define LINK_TUNE_INTERVAL round_jiffies_relative(HZ)
#define AGC_INTERVAL round_jiffies_relative(4 * HZ)
#define VCO_INTERVAL round_jiffies_relative(10 * HZ) /* 10 sec */
/*
* rt2x00_rate: Per rate device information
@ -277,12 +278,24 @@ void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev);
*/
void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev);
/**
* rt2x00link_start_vcocal - Start periodic VCO calibration
* @rt2x00dev: Pointer to &struct rt2x00_dev.
*/
void rt2x00link_start_vcocal(struct rt2x00_dev *rt2x00dev);
/**
* rt2x00link_stop_agc - Stop periodic gain calibration
* @rt2x00dev: Pointer to &struct rt2x00_dev.
*/
void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev);
/**
* rt2x00link_stop_vcocal - Stop periodic VCO calibration
* @rt2x00dev: Pointer to &struct rt2x00_dev.
*/
void rt2x00link_stop_vcocal(struct rt2x00_dev *rt2x00dev);
/**
* rt2x00link_register - Initialize link tuning & watchdog functionality
* @rt2x00dev: Pointer to &struct rt2x00_dev.

39
drivers/net/wireless/rt2x00/rt2x00link.c
View File

@ -447,11 +447,27 @@ void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev)
AGC_INTERVAL);
}
void rt2x00link_start_vcocal(struct rt2x00_dev *rt2x00dev)
{
struct link *link = &rt2x00dev->link;
if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
rt2x00dev->ops->lib->vco_calibration)
ieee80211_queue_delayed_work(rt2x00dev->hw,
&link->vco_work,
VCO_INTERVAL);
}
void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev)
{
cancel_delayed_work_sync(&rt2x00dev->link.agc_work);
}
void rt2x00link_stop_vcocal(struct rt2x00_dev *rt2x00dev)
{
cancel_delayed_work_sync(&rt2x00dev->link.vco_work);
}
static void rt2x00link_agc(struct work_struct *work)
{
struct rt2x00_dev *rt2x00dev =
@ -473,9 +489,32 @@ static void rt2x00link_agc(struct work_struct *work)
AGC_INTERVAL);
}
static void rt2x00link_vcocal(struct work_struct *work)
{
struct rt2x00_dev *rt2x00dev =
container_of(work, struct rt2x00_dev, link.vco_work.work);
struct link *link = &rt2x00dev->link;
/*
* When the radio is shutting down we should
* immediately cease the VCO calibration.
*/
if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
return;
rt2x00dev->ops->lib->vco_calibration(rt2x00dev);
if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
ieee80211_queue_delayed_work(rt2x00dev->hw,
&link->vco_work,
VCO_INTERVAL);
}
void rt2x00link_register(struct rt2x00_dev *rt2x00dev)
{
INIT_DELAYED_WORK(&rt2x00dev->link.agc_work, rt2x00link_agc);
if (test_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags))
INIT_DELAYED_WORK(&rt2x00dev->link.vco_work, rt2x00link_vcocal);
INIT_DELAYED_WORK(&rt2x00dev->link.watchdog_work, rt2x00link_watchdog);
INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00link_tuner);
}