Signed-off-by: Vasanthakumar Thiagarajan <vasanth@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/debug.h | 1 +
drivers/net/wireless/ath/ath9k/hw.c | 212 ++++++++++++++++++++++++++++++++
drivers/net/wireless/ath/ath9k/hw.h | 52 ++++++++
drivers/net/wireless/ath/ath9k/reg.h | 15 ++-
4 files changed, 278 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 5e56b79..ea0dd1e 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -30,6 +30,7 @@ enum ATH_DEBUG {
ATH_DBG_CONFIG = 0x00000200,
ATH_DBG_FATAL = 0x00000400,
ATH_DBG_PS = 0x00000800,
+ ATH_DBG_HWTIMER = 0x00001000,
ATH_DBG_ANY = 0xffffffff
};
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index c80be8c..3afd7a9 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3215,6 +3215,23 @@ bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked)
if (AR_SREV_9100(ah))
return true;
+ if (isr & AR_ISR_GENTMR) {
+ u32 s5_s;
+
+ s5_s = REG_READ(ah, AR_ISR_S5_S);
+ if (isr & AR_ISR_GENTMR) {
+ ah->intr_gen_timer_trigger =
+ MS(s5_s, AR_ISR_S5_GENTIMER_TRIG);
+
+ ah->intr_gen_timer_thresh =
+ MS(s5_s, AR_ISR_S5_GENTIMER_THRESH);
+
+ if (ah->intr_gen_timer_trigger)
+ *masked |= ATH9K_INT_GENTIMER;
+
+ }
+ }
+
if (sync_cause) {
fatal_int =
(sync_cause &
@@ -4078,3 +4095,198 @@ void ath9k_hw_set11nmac2040(struct ath_hw *ah, enum ath9k_ht_macmode mode)
REG_WRITE(ah, AR_2040_MODE, macmode);
}
+
+/* HW Generic timers configuration */
+
+static const struct ath_gen_timer_configuration gen_tmr_configuration[] =
+{
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+ {AR_NEXT_NDP2_TIMER, AR_NDP2_PERIOD, AR_NDP2_TIMER_MODE, 0x0001},
+ {AR_NEXT_NDP2_TIMER + 1*4, AR_NDP2_PERIOD + 1*4,
+ AR_NDP2_TIMER_MODE, 0x0002},
+ {AR_NEXT_NDP2_TIMER + 2*4, AR_NDP2_PERIOD + 2*4,
+ AR_NDP2_TIMER_MODE, 0x0004},
+ {AR_NEXT_NDP2_TIMER + 3*4, AR_NDP2_PERIOD + 3*4,
+ AR_NDP2_TIMER_MODE, 0x0008},
+ {AR_NEXT_NDP2_TIMER + 4*4, AR_NDP2_PERIOD + 4*4,
+ AR_NDP2_TIMER_MODE, 0x0010},
+ {AR_NEXT_NDP2_TIMER + 5*4, AR_NDP2_PERIOD + 5*4,
+ AR_NDP2_TIMER_MODE, 0x0020},
+ {AR_NEXT_NDP2_TIMER + 6*4, AR_NDP2_PERIOD + 6*4,
+ AR_NDP2_TIMER_MODE, 0x0040},
+ {AR_NEXT_NDP2_TIMER + 7*4, AR_NDP2_PERIOD + 7*4,
+ AR_NDP2_TIMER_MODE, 0x0080}
+};
+
+/* HW generic timer primitives */
+
+/* compute and clear index of rightmost 1 */
+static u32 rightmost_index(struct ath_gen_timer_table *timer_table, u32 *mask)
+{
+ u32 b;
+
+ b = *mask;
+ b &= (0-b);
+ *mask &= ~b;
+ b *= debruijn32;
+ b >>= 27;
+
+ return timer_table->gen_timer_index[b];
+}
+
+static u32 ath9k_hw_gettsf32(struct ath_hw *ah)
+{
+ return REG_READ(ah, AR_TSF_L32);
+}
+
+struct ath_gen_timer *ath_gen_timer_alloc(struct ath_hw *ah,
+ void (*trigger)(void *),
+ void (*overflow)(void *),
+ void *arg,
+ u8 timer_index)
+{
+ struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+ struct ath_gen_timer *timer;
+
+ timer = kzalloc(sizeof(struct ath_gen_timer), GFP_KERNEL);
+
+ if (timer == NULL) {
+ printk(KERN_DEBUG "Failed to allocate memory"
+ "for hw timer[%d]\n", timer_index);
+ return NULL;
+ }
+
+ /* allocate a hardware generic timer slot */
+ timer_table->timers[timer_index] = timer;
+ timer->index = timer_index;
+ timer->trigger = trigger;
+ timer->overflow = overflow;
+ timer->arg = arg;
+
+ return timer;
+}
+
+void ath_gen_timer_start(struct ath_hw *ah,
+ struct ath_gen_timer *timer,
+ u32 timer_next, u32 timer_period)
+{
+ struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+ u32 tsf;
+
+ BUG_ON(!timer_period);
+
+ set_bit(timer->index, &timer_table->timer_mask.timer_bits);
+
+ tsf = ath9k_hw_gettsf32(ah);
+
+ DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER, "curent tsf %x period %x"
+ "timer_next %x\n", tsf, timer_period, timer_next);
+
+ /*
+ * Pull timer_next forward if the current TSF already passed it
+ * because of software latency
+ */
+ if (timer_next < tsf)
+ timer_next = tsf + timer_period;
+
+ /*
+ * Program generic timer registers
+ */
+ REG_WRITE(ah, gen_tmr_configuration[timer->index].next_addr,
+ timer_next);
+ REG_WRITE(ah, gen_tmr_configuration[timer->index].period_addr,
+ timer_period);
+ REG_SET_BIT(ah, gen_tmr_configuration[timer->index].mode_addr,
+ gen_tmr_configuration[timer->index].mode_mask);
+
+ /* Enable both trigger and thresh interrupt masks */
+ REG_SET_BIT(ah, AR_IMR_S5,
+ (SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_THRESH) |
+ SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_TRIG)));
+
+ if ((ah->ah_sc->imask & ATH9K_INT_GENTIMER) == 0) {
+ ath9k_hw_set_interrupts(ah, 0);
+ ah->ah_sc->imask |= ATH9K_INT_GENTIMER;
+ ath9k_hw_set_interrupts(ah, ah->ah_sc->imask);
+ }
+}
+
+void ath_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
+{
+ struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+
+ if ((timer->index < AR_FIRST_NDP_TIMER) ||
+ (timer->index >= ATH_MAX_GEN_TIMER)) {
+ return;
+ }
+
+ /* Clear generic timer enable bits. */
+ REG_CLR_BIT(ah, gen_tmr_configuration[timer->index].mode_addr,
+ gen_tmr_configuration[timer->index].mode_mask);
+
+ /* Disable both trigger and thresh interrupt masks */
+ REG_CLR_BIT(ah, AR_IMR_S5,
+ (SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_THRESH) |
+ SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_TRIG)));
+
+ clear_bit(timer->index, &timer_table->timer_mask.timer_bits);
+
+ /* if no timer is enabled, turn off interrupt mask */
+ if (timer_table->timer_mask.val == 0) {
+ ath9k_hw_set_interrupts(ah, 0);
+ ah->ah_sc->imask &= ~ATH9K_INT_GENTIMER;
+ ath9k_hw_set_interrupts(ah, ah->ah_sc->imask);
+ }
+}
+
+void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer)
+{
+ struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+
+ /* free the hardware generic timer slot */
+ timer_table->timers[timer->index] = NULL;
+ kfree(timer);
+}
+
+/*
+ * Generic Timer Interrupts handling
+ */
+void ath_gen_timer_isr(struct ath_hw *ah)
+{
+ struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+ struct ath_gen_timer *timer;
+ u32 trigger_mask, thresh_mask, index;
+
+ /* get hardware generic timer interrupt status */
+ trigger_mask = ah->intr_gen_timer_trigger;
+ thresh_mask = ah->intr_gen_timer_thresh;
+ trigger_mask &= timer_table->timer_mask.val;
+ thresh_mask &= timer_table->timer_mask.val;
+
+ trigger_mask &= ~thresh_mask;
+
+ while (thresh_mask) {
+ index = rightmost_index(timer_table, &thresh_mask);
+ timer = timer_table->timers[index];
+ BUG_ON(!timer);
+ DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER,
+ "TSF overflow for Gen timer %d\n", index);
+ timer->overflow(timer->arg);
+ }
+
+ while (trigger_mask) {
+ index = rightmost_index(timer_table, &trigger_mask);
+ timer = timer_table->timers[index];
+ BUG_ON(!timer);
+ DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER,
+ "Gen timer[%d] trigger\n", index);
+ timer->trigger(timer->arg);
+ }
+}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index de10de8..052a9c4 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
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index c9e1ac9..1d8e0a8 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -234,7 +234,15 @@
#define AR_IMR_S5 0x00b8
#define AR_IMR_S5_TIM_TIMER 0x00000010
#define AR_IMR_S5_DTIM_TIMER 0x00000020
-
+#define AR_ISR_S5_GENTIMER_TRIG 0x0000FF80
+#define AR_ISR_S5_GENTIMER_TRIG_S 0
+#define AR_ISR_S5_GENTIMER_THRESH 0xFF800000
+#define AR_ISR_S5_GENTIMER_THRESH_S 16
+#define AR_ISR_S5_S 0x00d8
+#define AR_IMR_S5_GENTIMER_TRIG 0x0000FF80
+#define AR_IMR_S5_GENTIMER_TRIG_S 0
+#define AR_IMR_S5_GENTIMER_THRESH 0xFF800000
+#define AR_IMR_S5_GENTIMER_THRESH_S 16
#define AR_IMR 0x00a0
#define AR_IMR_RXOK 0x00000001
@@ -1516,7 +1524,10 @@ enum {
#define AR_TXOP_8_11 0x81f8
#define AR_TXOP_12_15 0x81fc
-
+#define AR_NEXT_NDP2_TIMER 0x8180
+#define AR_FIRST_NDP_TIMER 7
+#define AR_NDP2_PERIOD 0x81a0
+#define AR_NDP2_TIMER_MODE 0x81c0
#define AR_NEXT_TBTT_TIMER 0x8200
#define AR_NEXT_DMA_BEACON_ALERT 0x8204
#define AR_NEXT_SWBA 0x8208
--
1.5.5.1
--
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