ath9k: Add infrastructure for generic hw timers

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index de10de8370d..052a9c4ebb9 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -237,6 +237,7 @@ enum ath9k_int {
         ATH9K_INT_GPIO = 0x01000000,
         ATH9K_INT_CABEND = 0x02000000,
         ATH9K_INT_TSFOOR = 0x04000000,
+        ATH9K_INT_GENTIMER = 0x08000000,
         ATH9K_INT_CST = 0x10000000,
         ATH9K_INT_GTT = 0x20000000,
         ATH9K_INT_FATAL = 0x40000000,
@@ -390,6 +391,41 @@ struct ath9k_hw_version {
         u16 analog2GhzRev;
 };
 
+/* Generic TSF timer definitions */
+
+#define ATH_MAX_GEN_TIMER       16
+
+#define AR_GENTMR_BIT(_index)   (1 << (_index))
+
+/*
+ * Using de Bruijin sequence to to look up 1's index in a 32 bit number
+ * debruijn32 = 0000 0111 0111 1100 1011 0101 0011 0001
+ */
+#define debruijn32 0x077CB531UL
+
+struct ath_gen_timer_configuration {
+        u32 next_addr;
+        u32 period_addr;
+        u32 mode_addr;
+        u32 mode_mask;
+};
+
+struct ath_gen_timer {
+        void (*trigger)(void *arg);
+        void (*overflow)(void *arg);
+        void *arg;
+        u8 index;
+};
+
+struct ath_gen_timer_table {
+        u32 gen_timer_index[32];
+        struct ath_gen_timer *timers[ATH_MAX_GEN_TIMER];
+        union {
+                unsigned long timer_bits;
+                u16 val;
+        } timer_mask;
+};
+
 struct ath_hw {
         struct ath_softc *ah_sc;
         struct ath9k_hw_version hw_version;
@@ -536,6 +572,10 @@ struct ath_hw {
         struct ar5416IniArray iniModesAdditional;
         struct ar5416IniArray iniModesRxGain;
         struct ar5416IniArray iniModesTxGain;
+
+        u32 intr_gen_timer_trigger;
+        u32 intr_gen_timer_thresh;
+        struct ath_gen_timer_table hw_gen_timers;
 };
 
 /* Initialization, Detach, Reset */
@@ -611,4 +651,16 @@ bool ath9k_hw_intrpend(struct ath_hw *ah);
 bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked);
 enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints);
 
+/* Generic hw timer primitives */
+struct ath_gen_timer *ath_gen_timer_alloc(struct ath_hw *ah,
+                                          void (*trigger)(void *),
+                                          void (*overflow)(void *),
+                                          void *arg,
+                                          u8 timer_index);
+void ath_gen_timer_start(struct ath_hw *ah, struct ath_gen_timer *timer,
+                         u32 timer_next, u32 timer_period);
+void ath_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer);
+void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
+void ath_gen_timer_isr(struct ath_hw *hw);
+
 #endif