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[ath-next,v4] wifi: ath12k: read country code from SMBIOS for WCN7850

Message ID 20250327021403.1577-1-quic_kangyang@quicinc.com
State New
Headers show
Series [ath-next,v4] wifi: ath12k: read country code from SMBIOS for WCN7850 | expand

Commit Message

Kang Yang March 27, 2025, 2:14 a.m. UTC 
Read the country code from SMBIOS and send it to the firmware. The
firmware will then indicate the regulatory domain information for
the country code, which ath12k will use.

dmesg:
[ 1242.637253] ath12k_pci 0000:02:00.0: worldwide regdomain setting from SMBIOS
[ 1242.637259] ath12k_pci 0000:02:00.0: bdf variant name not found.
[ 1242.637261] ath12k_pci 0000:02:00.0: SMBIOS bdf variant name not set.
[ 1242.927543] ath12k_pci 0000:02:00.0: set current country pdev id 0 alpha2 00

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-02582-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kang Yang <quic_kangyang@quicinc.com>
---

Depends-On:
        [PATCH ath-next v14 0/4] wifi: ath12k: add 11d scan offload support and handle country code for WCN7850
	https://lore.kernel.org/linux-wireless/20250327020527.1527-1-quic_kangyang@quicinc.com/

Note: This patch is an old patch in public review written by
Wen Gong. Just resend it for him.
Link: https://lore.kernel.org/linux-wireless/20230913105156.17618-1-quic_wgong@quicinc.com/

v4:
    1. fix assignment error for case ATH12K_SMBIOS_CC_ISO.
    2. rebase on tag: ath/main(ath-202503251458).
v3:
    1. rebase on tag: ath-202503172347.
    2. add branch tag.
    3. add descripition for Wen Gong.
v2:
    1. rebase on tag: ath/main(ath-202502181756).
    2. rewrite commit message.

---
 drivers/net/wireless/ath/ath12k/core.c | 26 +++++++++++++++++++++++--
 drivers/net/wireless/ath/ath12k/core.h | 27 +++++++++++++++++++++++++-
 drivers/net/wireless/ath/ath12k/mac.c  | 11 +++++++++++
 3 files changed, 61 insertions(+), 3 deletions(-)


base-commit: 1aa05c6f5681b371b981bf1902f1b96528feec7c
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 06e3ee16eb0e..b29b675c70b9 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -657,7 +657,7 @@  static void ath12k_core_stop(struct ath12k_base *ab)
 	/* De-Init of components as needed */
 }
 
-static void ath12k_core_check_bdfext(const struct dmi_header *hdr, void *data)
+static void ath12k_core_check_cc_code_bdfext(const struct dmi_header *hdr, void *data)
 {
 	struct ath12k_base *ab = data;
 	const char *magic = ATH12K_SMBIOS_BDF_EXT_MAGIC;
@@ -679,6 +679,28 @@  static void ath12k_core_check_bdfext(const struct dmi_header *hdr, void *data)
 		return;
 	}
 
+	spin_lock_bh(&ab->base_lock);
+
+	switch (smbios->country_code_flag) {
+	case ATH12K_SMBIOS_CC_ISO:
+		ab->new_alpha2[0] = u16_get_bits(smbios->cc_code >> 8, 0xff);
+		ab->new_alpha2[1] = u16_get_bits(smbios->cc_code, 0xff);
+		ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot smbios cc_code %c%c\n",
+			   ab->new_alpha2[0], ab->new_alpha2[1]);
+		break;
+	case ATH12K_SMBIOS_CC_WW:
+		ab->new_alpha2[0] = '0';
+		ab->new_alpha2[1] = '0';
+		ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot smbios worldwide regdomain\n");
+		break;
+	default:
+		ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot ignore smbios country code setting %d\n",
+			   smbios->country_code_flag);
+		break;
+	}
+
+	spin_unlock_bh(&ab->base_lock);
+
 	if (!smbios->bdf_enabled) {
 		ath12k_dbg(ab, ATH12K_DBG_BOOT, "bdf variant name not found.\n");
 		return;
@@ -718,7 +740,7 @@  static void ath12k_core_check_bdfext(const struct dmi_header *hdr, void *data)
 int ath12k_core_check_smbios(struct ath12k_base *ab)
 {
 	ab->qmi.target.bdf_ext[0] = '\0';
-	dmi_walk(ath12k_core_check_bdfext, ab);
+	dmi_walk(ath12k_core_check_cc_code_bdfext, ab);
 
 	if (ab->qmi.target.bdf_ext[0] == '\0')
 		return -ENODATA;
diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h
index 5f98b98b38cf..8a6f79490b41 100644
--- a/drivers/net/wireless/ath/ath12k/core.h
+++ b/drivers/net/wireless/ath/ath12k/core.h
@@ -175,9 +175,34 @@  struct ath12k_ext_irq_grp {
 	struct net_device *napi_ndev;
 };
 
+enum ath12k_smbios_cc_type {
+	/* disable country code setting from SMBIOS */
+	ATH12K_SMBIOS_CC_DISABLE = 0,
+
+	/* set country code by ANSI country name, based on ISO3166-1 alpha2 */
+	ATH12K_SMBIOS_CC_ISO = 1,
+
+	/* worldwide regdomain */
+	ATH12K_SMBIOS_CC_WW = 2,
+};
+
 struct ath12k_smbios_bdf {
 	struct dmi_header hdr;
-	u32 padding;
+	u8 features_disabled;
+
+	/* enum ath12k_smbios_cc_type */
+	u8 country_code_flag;
+
+	/* To set specific country, you need to set country code
+	 * flag=ATH12K_SMBIOS_CC_ISO first, then if country is United
+	 * States, then country code value = 0x5553 ("US",'U' = 0x55, 'S'=
+	 * 0x53). To set country to INDONESIA, then country code value =
+	 * 0x4944 ("IN", 'I'=0x49, 'D'=0x44). If country code flag =
+	 * ATH12K_SMBIOS_CC_WW, then you can use worldwide regulatory
+	 * setting.
+	 */
+	u16 cc_code;
+
 	u8 bdf_enabled;
 	u8 bdf_ext[];
 } __packed;
diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index d522972b24bf..6395035b5378 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -11628,6 +11628,17 @@  static int ath12k_mac_hw_register(struct ath12k_hw *ah)
 			goto err_unregister_hw;
 		}
 
+		if (ar->ab->hw_params->current_cc_support && ab->new_alpha2[0]) {
+			struct wmi_set_current_country_arg current_cc = {};
+
+			memcpy(&current_cc.alpha2, ab->new_alpha2, 2);
+			memcpy(&ar->alpha2, ab->new_alpha2, 2);
+			ret = ath12k_wmi_send_set_current_country_cmd(ar, &current_cc);
+			if (ret)
+				ath12k_warn(ar->ab,
+					    "failed set cc code for mac register: %d\n", ret);
+		}
+
 		ath12k_fw_stats_init(ar);
 		ath12k_debugfs_register(ar);
 	}