wifi: ath12k: add support for hardware rfkill for WCN7850

When hardware rfkill is enabled in the firmware, it will report the
capability using WMI_SYS_CAP_INFO_RFKILL bit in the WMI_SERVICE_READY event
to the host. Currently ath12k does not process this service capability. In
order to support this, update ath12k to check if the capability is enabled,
if so, send the GPIO information to firmware. When the firmware detects
hardware rfkill is enabled by the user, it will report it using
WMI_RFKILL_STATE_CHANGE_EVENTID. When ath12k receive the event, it will set
the value of rfkill_radio_on based on whether radio_state is equal to
WMI_RFKILL_RADIO_STATE_ON, then send WMI_PDEV_PARAM_RFKILL_ENABLE to
firmware.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Lingbo Kong <quic_lingbok@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230906110412.182176-1-quic_lingbok@quicinc.com

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 39f938fafa81..c6fb1e435d86 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -19,6 +19,27 @@ unsigned int ath12k_debug_mask;
 module_param_named(debug_mask, ath12k_debug_mask, uint, 0644);
 MODULE_PARM_DESC(debug_mask, "Debugging mask");
 
+static int ath12k_core_rfkill_config(struct ath12k_base *ab)
+{
+	struct ath12k *ar;
+	int ret = 0, i;
+
+	if (!(ab->target_caps.sys_cap_info & WMI_SYS_CAP_INFO_RFKILL))
+		return 0;
+
+	for (i = 0; i < ab->num_radios; i++) {
+		ar = ab->pdevs[i].ar;
+
+		ret = ath12k_mac_rfkill_config(ar);
+		if (ret && ret != -EOPNOTSUPP) {
+			ath12k_warn(ab, "failed to configure rfkill: %d", ret);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
 int ath12k_core_suspend(struct ath12k_base *ab)
 {
 	int ret;
@@ -603,6 +624,13 @@ int ath12k_core_qmi_firmware_ready(struct ath12k_base *ab)
 		goto err_core_stop;
 	}
 	ath12k_hif_irq_enable(ab);
+
+	ret = ath12k_core_rfkill_config(ab);
+	if (ret && ret != -EOPNOTSUPP) {
+		ath12k_err(ab, "failed to config rfkill: %d\n", ret);
+		goto err_core_stop;
+	}
+
 	mutex_unlock(&ab->core_lock);
 
 	return 0;
@@ -655,6 +683,27 @@ err_hal_srng_deinit:
 	return ret;
 }
 
+static void ath12k_rfkill_work(struct work_struct *work)
+{
+	struct ath12k_base *ab = container_of(work, struct ath12k_base, rfkill_work);
+	struct ath12k *ar;
+	bool rfkill_radio_on;
+	int i;
+
+	spin_lock_bh(&ab->base_lock);
+	rfkill_radio_on = ab->rfkill_radio_on;
+	spin_unlock_bh(&ab->base_lock);
+
+	for (i = 0; i < ab->num_radios; i++) {
+		ar = ab->pdevs[i].ar;
+		if (!ar)
+			continue;
+
+		ath12k_mac_rfkill_enable_radio(ar, rfkill_radio_on);
+		wiphy_rfkill_set_hw_state(ar->hw->wiphy, !rfkill_radio_on);
+	}
+}
+
 void ath12k_core_halt(struct ath12k *ar)
 {
 	struct ath12k_base *ab = ar->ab;
@@ -668,6 +717,7 @@ void ath12k_core_halt(struct ath12k *ar)
 	ath12k_mac_peer_cleanup_all(ar);
 	cancel_delayed_work_sync(&ar->scan.timeout);
 	cancel_work_sync(&ar->regd_update_work);
+	cancel_work_sync(&ab->rfkill_work);
 
 	rcu_assign_pointer(ab->pdevs_active[ar->pdev_idx], NULL);
 	synchronize_rcu();
@@ -921,6 +971,8 @@ struct ath12k_base *ath12k_core_alloc(struct device *dev, size_t priv_size,
 	init_waitqueue_head(&ab->wmi_ab.tx_credits_wq);
 	INIT_WORK(&ab->restart_work, ath12k_core_restart);
 	INIT_WORK(&ab->reset_work, ath12k_core_reset);
+	INIT_WORK(&ab->rfkill_work, ath12k_rfkill_work);
+
 	timer_setup(&ab->rx_replenish_retry, ath12k_ce_rx_replenish_retry, 0);
 	init_completion(&ab->htc_suspend);