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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2021 Intel Corporation
*/
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "aosp.h"
/* Command complete parameters of LE_Get_Vendor_Capabilities_Command
* The parameters grow over time. The base version that declares the
* version_supported field is v0.95. Refer to
* https://cs.android.com/android/platform/superproject/+/master:system/
* bt/gd/hci/controller.cc;l=452?q=le_get_vendor_capabilities_handler
*/
struct aosp_rp_le_get_vendor_capa {
/* v0.95: 15 octets */
__u8 status;
__u8 max_advt_instances;
__u8 offloaded_resolution_of_private_address;
__le16 total_scan_results_storage;
__u8 max_irk_list_sz;
__u8 filtering_support;
__u8 max_filter;
__u8 activity_energy_info_support;
__le16 version_supported;
__le16 total_num_of_advt_tracked;
__u8 extended_scan_support;
__u8 debug_logging_supported;
/* v0.96: 16 octets */
__u8 le_address_generation_offloading_support;
/* v0.98: 21 octets */
__le32 a2dp_source_offload_capability_mask;
__u8 bluetooth_quality_report_support;
/* v1.00: 25 octets */
__le32 dynamic_audio_buffer_support;
} __packed;
#define VENDOR_CAPA_BASE_SIZE 15
#define VENDOR_CAPA_0_98_SIZE 21
void aosp_do_open(struct hci_dev *hdev)
{
struct sk_buff *skb;
struct aosp_rp_le_get_vendor_capa *rp;
u16 version_supported;
if (!hdev->aosp_capable)
return;
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)) {
bt_dev_err(hdev, "AOSP get vendor capabilities (%ld)",
PTR_ERR(skb));
return;
}
/* A basic length check */
if (skb->len < VENDOR_CAPA_BASE_SIZE)
goto length_error;
rp = (struct aosp_rp_le_get_vendor_capa *)skb->data;
version_supported = le16_to_cpu(rp->version_supported);
/* AOSP displays the verion number like v0.98, v1.00, etc. */
bt_dev_info(hdev, "AOSP extensions version v%u.%02u",
version_supported >> 8, version_supported & 0xff);
/* Do not support very old versions. */
if (version_supported < 95) {
bt_dev_warn(hdev, "AOSP capabilities version %u too old",
version_supported);
goto done;
}
if (version_supported < 98) {
bt_dev_warn(hdev, "AOSP quality report is not supported");
goto done;
}
if (skb->len < VENDOR_CAPA_0_98_SIZE)
goto length_error;
/* The bluetooth_quality_report_support is defined at version
* v0.98. Refer to
* https://cs.android.com/android/platform/superproject/+/
* master:system/bt/gd/hci/controller.cc;l=477
*/
if (rp->bluetooth_quality_report_support) {
hdev->aosp_quality_report = true;
bt_dev_info(hdev, "AOSP quality report is supported");
}
goto done;
length_error:
bt_dev_err(hdev, "AOSP capabilities length %d too short", skb->len);
done:
kfree_skb(skb);
}
void aosp_do_close(struct hci_dev *hdev)
{
if (!hdev->aosp_capable)
return;
bt_dev_dbg(hdev, "Cleanup of AOSP extension");
}
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