netdev - [PATCH v5 1/3] Bluetooth: Add struct of reading AOSP vendor capabilities

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Message-Id: <20211019200701.v5.1.I139e71adfd3f00b88fe9edb63d013f9cd3e24506@changeid>
Date:   Tue, 19 Oct 2021 20:07:13 +0800
From:   Joseph Hwang <josephsih@...omium.org>
To:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        luiz.dentz@...il.com, pali@...nel.org
Cc:     josephsih@...gle.com, chromeos-bluetooth-upstreaming@...omium.org,
        Joseph Hwang <josephsih@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v5 1/3] Bluetooth: Add struct of reading AOSP vendor capabilities

This patch adds the struct of reading AOSP vendor capabilities.
New capabilities are added incrementally. Note that the
version_supported octets will be used to determine whether a
capability has been defined for the version.

Signed-off-by: Joseph Hwang <josephsih@...omium.org>

---

Changes in v5:
- This is a new patch.
- Add struct aosp_rp_le_get_vendor_capabilities so that next patch
  can determine whether a particular capability is supported or not.

 net/bluetooth/aosp.c | 45 +++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 42 insertions(+), 3 deletions(-)

diff --git a/net/bluetooth/aosp.c b/net/bluetooth/aosp.c
index a1b7762335a5..3f0ea57a68de 100644
--- a/net/bluetooth/aosp.c
+++ b/net/bluetooth/aosp.c
@@ -8,9 +8,32 @@
 
 #include "aosp.h"
 
+#define AOSP_OP_LE_GET_VENDOR_CAPABILITIES	0x153
+struct aosp_rp_le_get_vendor_capabilities {
+	__u8	status;
+	__u8	max_advt_instances;
+	__u8	offloaded_resolution_of_private_address;
+	__u16	total_scan_results_storage;
+	__u8	max_irk_list_sz;
+	__u8	filtering_support;
+	__u8	max_filter;
+	__u8	activity_energy_info_support;
+	__u16	version_supported;
+	__u16	total_num_of_advt_tracked;
+	__u8	extended_scan_support;
+	__u8	debug_logging_supported;
+	__u8	le_address_generation_offloading_support;
+	__u32	a2dp_source_offload_capability_mask;
+	__u8	bluetooth_quality_report_support;
+	__u32	dynamic_audio_buffer_support;
+} __packed;
+
 void aosp_do_open(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;
+	struct aosp_rp_le_get_vendor_capabilities *rp;
+	u16 opcode;
+	u16 version_supported;
 
 	if (!hdev->aosp_capable)
 		return;
@@ -18,10 +41,26 @@ void aosp_do_open(struct hci_dev *hdev)
 	bt_dev_dbg(hdev, "Initialize AOSP extension");
 
 	/* LE Get Vendor Capabilities Command */
-	skb = __hci_cmd_sync(hdev, hci_opcode_pack(0x3f, 0x153), 0, NULL,
-			     HCI_CMD_TIMEOUT);
-	if (IS_ERR(skb))
+	opcode = hci_opcode_pack(0x3f, AOSP_OP_LE_GET_VENDOR_CAPABILITIES);
+	skb = __hci_cmd_sync(hdev, opcode, 0, NULL, HCI_CMD_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_warn(hdev, "AOSP get vendor capabilities (%ld)",
+			    PTR_ERR(skb));
+		return;
+	}
+
+	bt_dev_info(hdev, "aosp le vendor capabilities length %d", skb->len);
+
+	rp = (struct aosp_rp_le_get_vendor_capabilities *)skb->data;
+
+	if (rp->status) {
+		bt_dev_err(hdev, "AOSP LE Get Vendor Capabilities status %d",
+			   rp->status);
 		return;
+	}
+
+	version_supported = le16_to_cpu(rp->version_supported);
+	bt_dev_info(hdev, "AOSP version 0x%4.4x", version_supported);
 
 	kfree_skb(skb);
 }
-- 
2.33.0.1079.g6e70778dc9-goog