According to the Ralink driver, there is an MCU
command which can be used to send the frequency
offset value directly to the USB device without
going through the RFCSR writing sequence.
Based on the DPO_RT5572_LinuxSTA_2.6.0.1_20120629
driver.
Reference:
RTMPAdjustFrequencyOffset function in common/rt_rf.c
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
---
Changes since v1:
- add a MCU_FREQ_OFFSET constant and use that instead
of a hardcoded number
---
drivers/net/wireless/rt2x00/rt2800.h | 1 +
drivers/net/wireless/rt2x00/rt2800lib.c | 6 +++++-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
index 6e69b96..e25e5bf 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -2794,6 +2794,7 @@ enum rt2800_eeprom_word {
#define MCU_RADAR 0x60
#define MCU_BOOT_SIGNAL 0x72
#define MCU_ANT_SELECT 0X73
+#define MCU_FREQ_OFFSET 0x74
#define MCU_BBP_SIGNAL 0x80
#define MCU_POWER_SAVE 0x83
#define MCU_BAND_SELECT 0x91
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 3407ac9..bebc56f 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2509,7 +2509,11 @@ static void rt2800_adjust_freq_offset(struct rt2x00_dev *rt2x00dev)
if (rfcsr == prev_rfcsr)
return;
- rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);
+ if (rt2x00_is_usb(rt2x00dev))
+ rt2800_mcu_request(rt2x00dev, MCU_FREQ_OFFSET, 0xff,
+ freq_offset, prev_rfcsr);
+ else
+ rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);
}
static void rt2800_config_channel_rf3290(struct rt2x00_dev *rt2x00dev,
--
1.7.10
--
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