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Bluetooth: Add support for reading LE supported states 

The LE supported states indicate the states and state combinations that
the link layer supports. This is important information for knowing what
operations are possible when dealing with multiple connected devices.
This patch adds reading of the supported states to the HCI init
sequence.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Johan Hedberg 2013-01-22 14:02:01 +02:00 committed by Gustavo Padovan
parent cf1d081f65
commit 9b008c0457
3 changed files with 27 additions and 0 deletions
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6
include/net/bluetooth/hci.h
View File

@ -1045,6 +1045,12 @@ struct hci_rp_le_ltk_neg_reply {
__le16 handle;
} __packed;
#define HCI_OP_LE_READ_SUPPORTED_STATES 0x201c
struct hci_rp_le_read_supported_states {
__u8 status;
__u8 le_states[8];
} __packed;
/* ---- HCI Events ---- */
#define HCI_EV_INQUIRY_COMPLETE 0x01

1
include/net/bluetooth/hci_core.h
View File

@ -154,6 +154,7 @@ struct hci_dev {
__u8 host_features[8];
__u8 le_features[8];
__u8 le_white_list_size;
__u8 le_states[8];
__u8 commands[64];
__u8 hci_ver;
__u16 hci_rev;

20
net/bluetooth/hci_event.c
View File

@ -617,6 +617,9 @@ static void le_setup(struct hci_dev *hdev)
/* Read LE White List Size */
hci_send_cmd(hdev, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
/* Read LE Supported States */
hci_send_cmd(hdev, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
}
static void hci_setup(struct hci_dev *hdev)
@ -1346,6 +1349,19 @@ static void hci_cc_le_ltk_neg_reply(struct hci_dev *hdev, struct sk_buff *skb)
hci_req_complete(hdev, HCI_OP_LE_LTK_NEG_REPLY, rp->status);
}
static void hci_cc_le_read_supported_states(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct hci_rp_le_read_supported_states *rp = (void *) skb->data;
BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
if (!rp->status)
memcpy(hdev->le_states, rp->le_states, 8);
hci_req_complete(hdev, HCI_OP_LE_READ_SUPPORTED_STATES, rp->status);
}
static void hci_cc_write_le_host_supported(struct hci_dev *hdev,
struct sk_buff *skb)
{
@ -2712,6 +2728,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_cc_le_ltk_neg_reply(hdev, skb);
break;
case HCI_OP_LE_READ_SUPPORTED_STATES:
hci_cc_le_read_supported_states(hdev, skb);
break;
case HCI_OP_WRITE_LE_HOST_SUPPORTED:
hci_cc_write_le_host_supported(hdev, skb);
break;