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From:   Kiran K <kiran.k@intel.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     Kiran K <kiran.k@intel.com>
Subject: [PATCH v10 03/10] Bluetooth: btintel: Read supported offload usecases
Date:   Wed, 30 Jun 2021 13:38:00 +0530
Message-Id: <20210630080807.12600-3-kiran.k@intel.com>
In-Reply-To: <20210630080807.12600-1-kiran.k@intel.com>
References: <20210630080807.12600-1-kiran.k@intel.com>
Precedence: bulk

Read offload usecases supported by controller.

Signed-off-by: Kiran K <kiran.k@intel.com>
Reviewed-by: Chethan T N <chethan.tumkur.narayan@intel.com>
Reviewed-by: Srivatsa Ravishankar <ravishankar.srivatsa@intel.com>
---
* changes in v10:
  - restructure patch to have  definition and call of callaback in the
    same patch
* changes in v9:
  - define a separate patch for core changes

 drivers/bluetooth/btintel.c | 32 ++++++++++++++++++++++++++++++++
 drivers/bluetooth/btintel.h | 16 ++++++++++++++++
 drivers/bluetooth/btusb.c   |  5 +++++
 3 files changed, 53 insertions(+)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index e44b6993cf91..7f9b5f82d01f 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1272,6 +1272,38 @@ int btintel_set_debug_features(struct hci_dev *hdev,
 }
 EXPORT_SYMBOL_GPL(btintel_set_debug_features);
 
+#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS)
+int btintel_configure_offload_usecases(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	int err = 0;
+	struct intel_offload_usecases *usecases;
+
+	skb = __hci_cmd_sync(hdev, 0xfc86, 0, NULL, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Reading offload usecases failed (%ld)",
+			   PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
+
+	if (skb->len < sizeof(*usecases)) {
+		err = -EIO;
+		goto error;
+	}
+
+	usecases = (void *)skb->data;
+
+	if (usecases->status) {
+		err = -bt_to_errno(skb->data[0]);
+		goto error;
+	}
+error:
+	kfree_skb(skb);
+	return err;
+}
+EXPORT_SYMBOL_GPL(btintel_configure_offload_usecases);
+#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
index d184064a5e7c..b667fc000c03 100644
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -132,6 +132,13 @@ struct intel_debug_features {
 	__u8    page1[16];
 } __packed;
 
+#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS)
+struct intel_offload_usecases {
+	__u8	status;
+	__u8	preset[8];
+} __packed;
+#endif
+
 #define INTEL_HW_PLATFORM(cnvx_bt)	((u8)(((cnvx_bt) & 0x0000ff00) >> 8))
 #define INTEL_HW_VARIANT(cnvx_bt)	((u8)(((cnvx_bt) & 0x003f0000) >> 16))
 #define INTEL_CNVX_TOP_TYPE(cnvx_top)	((cnvx_top) & 0x00000fff)
@@ -175,6 +182,9 @@ 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);
+#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS)
+int btintel_configure_offload_usecases(struct hci_dev *hdev);
+#endif
 #else
 
 static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -307,4 +317,10 @@ static inline int btintel_set_debug_features(struct hci_dev *hdev,
 	return -EOPNOTSUPP;
 }
 
+#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS)
+static int btintel_configure_offload_usecases(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+#endif
 #endif
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index a9855a2dd561..0184e8668a84 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3008,6 +3008,11 @@ static int btusb_setup_intel_newgen(struct hci_dev *hdev)
 	/* Set DDC mask for available debug features */
 	btintel_set_debug_features(hdev, &features);
 
+#if IS_ENABLED(CONFIG_BT_OFFLOAD_CODECS)
+	/* Read supported usecases and set callbacks to fetch datapath id */
+	btintel_configure_offload_usecases(hdev);
+#endif
+
 	/* Read the Intel version information after loading the FW  */
 	err = btintel_read_version_tlv(hdev, &version);
 	if (err)
-- 
2.17.1