Bluetooth: Controller: Single timer use ISO Peripheral nRF54L support

Update ISO Peripheral for single timer use support required
for nRF54L Series SoCs.

As the timer is reset on every radio end, use the
radio_tmr_hcto_configure_abs() function to set the header
complete timeout correctly when using single timer for s/w
switching.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_peripheral_iso.c

@@ -462,8 +462,6 @@ static void isr_rx(void *param)
 	struct pdu_cis *pdu_tx;
 	uint64_t payload_count;
 	uint8_t payload_index;
-	uint32_t subevent_us;
-	uint32_t start_us;
 	uint8_t trx_done;
 	uint8_t crc_ok;
 	uint8_t cie;
@@ -807,6 +805,12 @@ static void isr_rx(void *param)
 		se_curr = 0U;
 	}
 
+	radio_isr_set(isr_tx, cis_lll);
+
+#if !defined(CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER)
+	uint32_t subevent_us;
+	uint32_t start_us;
+
 	/* Schedule next subevent reception */
 	subevent_us = radio_tmr_aa_restore();
 	subevent_us += cis_lll->offset - cis_offset_first +
@@ -825,8 +829,7 @@ static void isr_rx(void *param)
 
 	start_us = radio_tmr_start_us(0U, subevent_us);
 	LL_ASSERT(start_us == (subevent_us + 1U));
-
-	radio_isr_set(isr_tx, cis_lll);
+#endif /* !CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER */
 }
 
 static void isr_tx(void *param)
@@ -923,8 +926,14 @@ static void isr_tx(void *param)
 	subevent_us -= radio_rx_chain_delay_get(0U, 0U);
 #endif /* !CONFIG_BT_CTLR_PHY */
 
+#if defined(CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER)
+	start_us = radio_tmr_start_us(0U, subevent_us);
+	LL_ASSERT(start_us == (subevent_us + 1U));
+
+#else /* !CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER */
 	/* Compensate for the 1 us added by radio_tmr_start_us() */
 	start_us = subevent_us + 1U;
+#endif /* !CONFIG_BT_CTLR_SW_SWITCH_SINGLE_TIMER */
 
 	hcto = start_us +
 	       ((EVENT_JITTER_US + EVENT_TICKER_RES_MARGIN_US +
@@ -941,7 +950,7 @@ static void isr_tx(void *param)
 	hcto += radio_rx_chain_delay_get(0U, 0U);
 #endif /* !CONFIG_BT_CTLR_PHY */
 
-	radio_tmr_hcto_configure(hcto);
+	radio_tmr_hcto_configure_abs(hcto);
 
 #if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
 	radio_gpio_lna_setup();
@@ -1172,7 +1181,7 @@ static void isr_prepare_subevent_common(void *param)
 	hcto += radio_rx_chain_delay_get(0U, 0U);
 #endif /* !CONFIG_BT_CTLR_PHY */
 
-	radio_tmr_hcto_configure(hcto);
+	radio_tmr_hcto_configure_abs(hcto);
 
 #if defined(HAL_RADIO_GPIO_HAVE_LNA_PIN)
 	radio_gpio_lna_setup();