ath9k_hw: Find the maximum number of chains that hw supports
Have it in ah->caps. This will be used during various
calibrations.
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 49da184..a2f85b7 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1764,7 +1764,7 @@
struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
u16 capField = 0, eeval;
- u8 ant_div_ctl1;
+ u8 ant_div_ctl1, tx_chainmask, rx_chainmask;
eeval = ah->eep_ops->get_eeprom(ah, EEP_REG_0);
regulatory->current_rd = eeval;
@@ -1976,6 +1976,18 @@
pCap->pcie_lcr_offset = 0x80;
}
+ tx_chainmask = pCap->tx_chainmask;
+ rx_chainmask = pCap->rx_chainmask;
+ while (tx_chainmask || rx_chainmask) {
+ if (tx_chainmask & BIT(0))
+ pCap->max_txchains++;
+ if (rx_chainmask & BIT(0))
+ pCap->max_rxchains++;
+
+ tx_chainmask >>= 1;
+ rx_chainmask >>= 1;
+ }
+
return 0;
}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 76ae329..fcfd63e 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -199,6 +199,8 @@
u16 rts_aggr_limit;
u8 tx_chainmask;
u8 rx_chainmask;
+ u8 max_txchains;
+ u8 max_rxchains;
u16 tx_triglevel_max;
u16 reg_cap;
u8 num_gpio_pins;