ath11k: enable internal sleep clock

On x86 and other non-qcom platforms, host needs to explicitly tell the firmware
to use the internal sleep clock. Some QCA6390 modules have OTP burnt with
external sleep clock selected, and these modules can't work expectedly unless
firmware selects internal sleep clock.

Add a field to hw_params to support this difference.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.1.0.1-01238-QCAHKSWPL_SILICONZ-2
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1597389030-13887-11-git-send-email-kvalo@codeaurora.org

drivers/net/wireless/ath/ath11k/core.c

@@ -31,6 +31,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.bdf_addr = 0x4B0C0000,
 		.hw_ops = &ipq8074_ops,
 		.ring_mask = &ath11k_hw_ring_mask_ipq8074,
+		.internal_sleep_clock = false,
 	},
 	{
 		.name = "qca6390 hw2.0",
@@ -44,6 +45,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.bdf_addr = 0x4B0C0000,
 		.hw_ops = &qca6390_ops,
 		.ring_mask = &ath11k_hw_ring_mask_ipq8074,
+		.internal_sleep_clock = true,
 	},
 };
 

drivers/net/wireless/ath/ath11k/hw.h

@@ -133,6 +133,8 @@ struct ath11k_hw_params {
 	const struct ath11k_hw_ops *hw_ops;
 
 	const struct ath11k_hw_ring_mask *ring_mask;
+
+	bool internal_sleep_clock;
 };
 
 extern const struct ath11k_hw_ops ipq8074_ops;

drivers/net/wireless/ath/ath11k/qmi.c

@@ -9,6 +9,9 @@
 #include <linux/of.h>
 #include <linux/firmware.h>
 
+#define SLEEP_CLOCK_SELECT_INTERNAL_BIT	0x02
+#define HOST_CSTATE_BIT			0x04
+
 static struct qmi_elem_info qmi_wlanfw_host_cap_req_msg_v01_ei[] = {
 	{
 		.data_type	= QMI_OPT_FLAG,
@@ -1531,6 +1534,20 @@ static int ath11k_qmi_host_cap_send(struct ath11k_base *ab)
 	req.cal_done_valid = 1;
 	req.cal_done = ab->qmi.cal_done;
 
+	if (ab->hw_params.internal_sleep_clock) {
+		req.nm_modem_valid = 1;
+
+		/* Notify firmware that this is non-qualcomm platform. */
+		req.nm_modem |= HOST_CSTATE_BIT;
+
+		/* Notify firmware about the sleep clock selection,
+		 * nm_modem_bit[1] is used for this purpose. Host driver on
+		 * non-qualcomm platforms should select internal sleep
+		 * clock.
+		 */
+		req.nm_modem |= SLEEP_CLOCK_SELECT_INTERNAL_BIT;
+	}
+
 	ret = qmi_txn_init(&ab->qmi.handle, &txn,
 			   qmi_wlanfw_host_cap_resp_msg_v01_ei, &resp);
 	if (ret < 0)