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>
diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
index 06acabd..62e697f 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -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
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index f1df929..6104a14 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2497,6 +2497,80 @@
}
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 @@
}
}
+ 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);
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.h b/drivers/net/wireless/rt2x00/rt2800lib.h
index 8c3c281..419e36c 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.h
+++ b/drivers/net/wireless/rt2x00/rt2800lib.h
@@ -184,6 +184,7 @@
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);
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index 6ad6929..fc9acc2 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -1050,6 +1050,7 @@
.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,
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 0074c4e..f997f005 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -781,6 +781,7 @@
.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,
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index ed2ae6e..1906a94 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -355,6 +355,11 @@
* 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 @@
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 @@
CAPABILITY_EXTERNAL_LNA_BG,
CAPABILITY_DOUBLE_ANTENNA,
CAPABILITY_BT_COEXIST,
+ CAPABILITY_VCO_RECALIBRATION,
};
/*
@@ -978,6 +985,11 @@
struct tasklet_struct autowake_tasklet;
/*
+ * Used for VCO periodic calibration.
+ */
+ int rf_channel;
+
+ /*
* Protect the interrupt mask register.
*/
spinlock_t irqmask_lock;
diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index b704e5b..d7c0f86 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -232,6 +232,9 @@
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) &&
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index bae5b01..dfe485a 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -88,6 +88,8 @@
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 @@
* 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);
diff --git a/drivers/net/wireless/rt2x00/rt2x00lib.h b/drivers/net/wireless/rt2x00/rt2x00lib.h
index 4cdf247..78bd43b 100644
--- a/drivers/net/wireless/rt2x00/rt2x00lib.h
+++ b/drivers/net/wireless/rt2x00/rt2x00lib.h
@@ -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
@@ -278,12 +279,24 @@
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.
*
diff --git a/drivers/net/wireless/rt2x00/rt2x00link.c b/drivers/net/wireless/rt2x00/rt2x00link.c
index ea10b00..8368aab 100644
--- a/drivers/net/wireless/rt2x00/rt2x00link.c
+++ b/drivers/net/wireless/rt2x00/rt2x00link.c
@@ -447,11 +447,27 @@
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 @@
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);
}