From 2222ea387559ee8f994e1c046983d047c5d642d1 Mon Sep 17 00:00:00 2001
From: Joseph Hwang <josephsih@chromium.org>
Date: Sat, 8 May 2021 17:19:34 +0800
Subject: [PATCH] CHROMIUM: Bluetooth: set quality report callback for Intel

This patch sets up set_quality_report callback for Intel to
set and reset the debug features.

(This CHROMIUM patch will be reverted by an UPSTREAM patch later.)

BUG=b:170175384
TEST=On a platform with Intel Belutooth controller, observe the
messages in the system logs.
when the quality report feature is enabled by a user process:
  Bluetooth: set_exp_feature() quality report 1 changed 1
  Bluetooth: btintel_set_debug_features() hci0: trace_enable 2 mask 127

when the vs debug event is disalbed by a user process:
  Bluetooth: set_exp_feature() quality report 0 changed 1
  Bluetooth: btintel_set_debug_features() hci0: trace_enable 0 mask 0

Change-Id: Icd1d1345b5970d3a2f8da23a10578e051e7e43e4
Signed-off-by: Joseph Hwang <josephsih@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2949309
Reviewed-by: Yun-Hao Chung <howardchung@chromium.org>
---
 drivers/bluetooth/btintel.c | 75 ++++++++++++++++++++++++++++++++++++-
 drivers/bluetooth/btintel.h | 13 +++++++
 drivers/bluetooth/btusb.c   | 16 ++++++++
 3 files changed, 103 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1213,6 +1213,7 @@ void btintel_reset_to_bootloader(struct hci_dev *hdev)
 }
 EXPORT_SYMBOL_GPL(btintel_reset_to_bootloader);
 
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
 int btintel_read_debug_features(struct hci_dev *hdev,
 				struct intel_debug_features *features)
 {
@@ -1254,8 +1255,10 @@ int btintel_set_debug_features(struct hci_dev *hdev,
 	u8 trace_enable = 0x02;
 	struct sk_buff *skb;
 
-	if (!features)
+	if (!features) {
+		bt_dev_warn(hdev, "Debug features not read");
 		return -EINVAL;
+	}
 
 	if (!(features->page1[0] & 0x3f)) {
 		bt_dev_info(hdev, "Telemetry exception format not supported");
@@ -1286,10 +1289,80 @@ int btintel_set_debug_features(struct hci_dev *hdev,
 	}
 	kfree_skb(skb);
 
+	bt_dev_info(hdev, "set debug features: trace_enable 0x%02x mask 0x%02x",
+		    trace_enable, mask[3]);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(btintel_set_debug_features);
 
+int btintel_reset_debug_features(struct hci_dev *hdev,
+				 const struct intel_debug_features *features)
+{
+	u8 mask[11] = { 0x0a, 0x92, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
+			0x00, 0x00, 0x00 };
+	u8 trace_enable = 0x00;
+	struct sk_buff *skb;
+
+	if (!features) {
+		bt_dev_warn(hdev, "Debug features not read");
+		return -EINVAL;
+	}
+
+	if (!(features->page1[0] & 0x3f)) {
+		bt_dev_info(hdev, "Telemetry exception format not supported");
+		return 0;
+	}
+
+	/* Should stop the trace before writing ddc event mask. */
+	skb = __hci_cmd_sync(hdev, 0xfca1, 1, &trace_enable, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Stop tracing of link statistics events failed (%ld)",
+			   PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
+	kfree_skb(skb);
+
+	skb = __hci_cmd_sync(hdev, 0xfc8b, 11, mask, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Setting Intel telemetry ddc write event mask failed (%ld)",
+			   PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
+	kfree_skb(skb);
+
+	bt_dev_info(hdev, "reset debug features: trace_enable 0x%02x mask 0x%02x",
+		    trace_enable, mask[3]);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btintel_reset_debug_features);
+
+int btintel_set_quality_report(struct hci_dev *hdev, bool enable)
+{
+	struct intel_debug_features features;
+	int err;
+
+	bt_dev_dbg(hdev, "enable %d", enable);
+
+	/* Read the Intel supported features and if new exception formats
+	 * supported, need to load the additional DDC config to enable.
+	 */
+	err = btintel_read_debug_features(hdev, &features);
+	if (err)
+		return err;
+
+	/* Set or reset the debug features. */
+	if (enable)
+		err = btintel_set_debug_features(hdev, &features);
+	else
+		err = btintel_reset_debug_features(hdev, &features);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(btintel_set_quality_report);
+#endif
+
 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
 MODULE_VERSION(VERSION);
diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -171,10 +171,15 @@ int btintel_download_firmware_newgen(struct hci_dev *hdev,
 				     u32 *boot_param, u8 hw_variant,
 				     u8 sbe_type);
 void btintel_reset_to_bootloader(struct hci_dev *hdev);
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
 int btintel_read_debug_features(struct hci_dev *hdev,
 				struct intel_debug_features *features);
 int btintel_set_debug_features(struct hci_dev *hdev,
 			       const struct intel_debug_features *features);
+int btintel_reset_debug_features(struct hci_dev *hdev,
+			       const struct intel_debug_features *features);
+int btintel_set_quality_report(struct hci_dev *hdev, bool enable);
+#endif
 #else
 
 static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -301,10 +306,18 @@ static inline int btintel_read_debug_features(struct hci_dev *hdev,
 	return -EOPNOTSUPP;
 }
 
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
 static inline int btintel_set_debug_features(struct hci_dev *hdev,
 					     const struct intel_debug_features *features)
 {
 	return -EOPNOTSUPP;
 }
 
+static inline int btintel_reset_debug_features(struct hci_dev *hdev,
+					       const struct intel_debug_features *features)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
 #endif
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2937,6 +2937,11 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 		btintel_load_ddc_config(hdev, ddcname);
 	}
 
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+	hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);
+	bt_dev_dbg(hdev, "HCI_QUALITY_REPORT cleared");
+#endif
+
 	/* Read the Intel version information after loading the FW  */
 	err = btintel_read_version(hdev, &ver);
 	if (err)
@@ -3024,6 +3029,11 @@ static int btusb_setup_intel_newgen(struct hci_dev *hdev)
 	 */
 	btintel_load_ddc_config(hdev, ddcname);
 
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+	hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);
+	bt_dev_dbg(hdev, "HCI_QUALITY_REPORT cleared");
+#endif
+
 	/* Read the Intel version information after loading the FW  */
 	err = btintel_read_version_tlv(hdev, &version);
 	if (err)
@@ -4685,6 +4695,9 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->set_diag = btintel_set_diag;
 		hdev->set_bdaddr = btintel_set_bdaddr;
 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+		hdev->set_quality_report = btintel_set_quality_report;
+#endif
 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
@@ -4699,6 +4712,9 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->set_diag = btintel_set_diag;
 		hdev->set_bdaddr = btintel_set_bdaddr;
 		hdev->cmd_timeout = btusb_intel_cmd_timeout;
+#ifdef CONFIG_BT_FEATURE_QUALITY_REPORT
+		hdev->set_quality_report = btintel_set_quality_report;
+#endif
 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
-- 
2.33.0.rc2.250.ged5fa647cd-goog