Bluetooth: Read number of supported IAC on controller setup

When initializing a controller make sure to read out the number of
supported IAC and store its result. This value is needed to determine
if limited discoverable for BR/EDR can be configured or not.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index c8a91cb..8567f44 100644 (file)
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -815,6 +815,12 @@ struct hci_cp_host_buffer_size {
        __le16   sco_max_pkt;
 } __packed;
 
+#define HCI_OP_READ_NUM_SUPPORTED_IAC  0x0c38
+struct hci_rp_read_num_supported_iac {
+       __u8    status;
+       __u8    num_iac;
+} __packed;
+
 #define HCI_OP_WRITE_INQUIRY_MODE      0x0c45
 
 #define HCI_MAX_EIR_LENGTH             240

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0326b16..4e20842 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -159,6 +159,7 @@ struct hci_dev {
        __u16           manufacturer;
        __u16           lmp_subver;
        __u16           voice_setting;
+       __u8            num_iac;
        __u8            io_capability;
        __s8            inq_tx_power;
        __u16           page_scan_interval;

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 0e05ede..b5ef05e 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -370,6 +370,9 @@ static void bredr_setup(struct hci_request *req)
        /* Read Voice Setting */
        hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
 
+       /* Read Number of Supported IAC */
+       hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
+
        /* Clear Event Filters */
        flt_type = HCI_FLT_CLEAR_ALL;
        hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
@@ -2271,7 +2274,8 @@ struct hci_dev *hci_alloc_dev(void)
        hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
        hdev->esco_type = (ESCO_HV1);
        hdev->link_mode = (HCI_LM_ACCEPT);
-       hdev->io_capability = 0x03; /* No Input No Output */
+       hdev->num_iac = 0x01;           /* One IAC support is mandatory */
+       hdev->io_capability = 0x03;     /* No Input No Output */
        hdev->inq_tx_power = HCI_TX_POWER_INVALID;
        hdev->adv_tx_power = HCI_TX_POWER_INVALID;
 

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index da2bc3d..5391469 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -418,6 +418,21 @@ static void hci_cc_write_voice_setting(struct hci_dev *hdev,
                hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
 }
 
+static void hci_cc_read_num_supported_iac(struct hci_dev *hdev,
+                                         struct sk_buff *skb)
+{
+       struct hci_rp_read_num_supported_iac *rp = (void *) skb->data;
+
+       BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+       if (rp->status)
+               return;
+
+       hdev->num_iac = rp->num_iac;
+
+       BT_DBG("%s num iac %d", hdev->name, hdev->num_iac);
+}
+
 static void hci_cc_write_ssp_mode(struct hci_dev *hdev, struct sk_buff *skb)
 {
        __u8 status = *((__u8 *) skb->data);
@@ -2135,6 +2150,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
                hci_cc_write_voice_setting(hdev, skb);
                break;
 
+       case HCI_OP_READ_NUM_SUPPORTED_IAC:
+               hci_cc_read_num_supported_iac(hdev, skb);
+               break;
+
        case HCI_OP_WRITE_SSP_MODE:
                hci_cc_write_ssp_mode(hdev, skb);
                break;