[PATCH v3 12/13] wifi: ath12k: Power down userPD

Raj Kumar Bhagat
2024-12-09T16:57:56Z

From: Sowmiya Sree Elavalagan <quic_ssreeela@quicinc.com>

Set the stop bit in SMEM to power down the userPD. Wait for stop-ack IRQ
to indicate power down completion. Release the userPD firmware using its
peripheral ID.

Tested-on: IPQ5332 hw1.0 AHB WLAN.WBE.1.3.1-00130-QCAHKSWPL_SILICONZ-1

Signed-off-by: Sowmiya Sree Elavalagan <quic_ssreeela@quicinc.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
---
drivers/net/wireless/ath/ath12k/ahb.c | 30 +++++++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/ahb.c b/drivers/net/wireless/ath/ath12k/ahb.c
index 74d10af6591f..1015b422e263 100644
--- a/drivers/net/wireless/ath/ath12k/ahb.c
+++ b/drivers/net/wireless/ath/ath12k/ahb.c
@@ -477,6 +477,34 @@ static int ath12k_ahb_power_up(struct ath12k_base *ab)
return ret;
}

+static void ath12k_ahb_power_down(struct ath12k_base *ab, bool is_suspend)
+{
+ struct ath12k_ahb *ab_ahb = ath12k_ab_to_ahb(ab);
+ unsigned long time_left;
+ u32 pasid;
+ int ret;
+
+ qcom_smem_state_update_bits(ab_ahb->stop_state, BIT(ab_ahb->stop_bit),
+ BIT(ab_ahb->stop_bit));
+
+ time_left = wait_for_completion_timeout(&ab_ahb->userpd_stopped,
+ ATH12K_USERPD_STOP_TIMEOUT);
+ if (!time_left) {
+ ath12k_err(ab, "UserPD stop wait timed out\n");
+ return;
+ }
+
+ qcom_smem_state_update_bits(ab_ahb->stop_state, BIT(ab_ahb->stop_bit), 0);
+
+ pasid = (u32_encode_bits(ab_ahb->userpd_id, ATH12K_USERPD_ID_MASK)) |
+ ATH12K_AHB_UPD_SWID;
+ /* Release the firmware */
+ ret = qcom_scm_pas_shutdown(pasid);
+ if (ret)
+ ath12k_err(ab, "scm pas shutdown failed for userPD%d\n",
+ ab_ahb->userpd_id);
+}
+
static void ath12k_ahb_init_qmi_ce_config(struct ath12k_base *ab)
{
struct ath12k_qmi_ce_cfg *cfg = &ab->qmi.ce_cfg;
@@ -695,6 +723,7 @@ static const struct ath12k_hif_ops ath12k_ahb_hif_ops_ipq5332 = {
.irq_disable = ath12k_ahb_ext_irq_disable,
.map_service_to_pipe = ath12k_ahb_map_service_to_pipe,
.power_up = ath12k_ahb_power_up,
+ .power_down = ath12k_ahb_power_down,
};

static irqreturn_t ath12k_userpd_irq_handler(int irq, void *data)
@@ -1173,6 +1202,7 @@ static void ath12k_ahb_remove(struct platform_device *pdev)
struct ath12k_base *ab = platform_get_drvdata(pdev);

if (test_bit(ATH12K_FLAG_QMI_FAIL, &ab->dev_flags)) {
+ ath12k_ahb_power_down(ab, false);
ath12k_qmi_deinit_service(ab);
goto qmi_fail;
}
--
2.34.1