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NFC: hci: Reference every pipe information according to notification

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We update the tracked pipes status when receiving HCI commands.
Also we forward HCI errors and we reply to any HCI command, even though
we don't support it.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2015-01-27 01:18:14 +01:00 committed by Samuel Ortiz
parent af77522320
commit 615b524aca
2 changed files with 44 additions and 22 deletions
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58
net/nfc/hci/core.c
View file

@ -193,52 +193,66 @@ void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
struct sk_buff *skb)
{
int r = 0;
u8 gate = hdev->pipes[pipe].gate;
u8 local_gate, new_pipe;
u8 gate_opened = 0x00;
u8 status = NFC_HCI_ANY_OK;
struct hci_create_pipe_resp *create_info;
struct hci_delete_pipe_noti *delete_info;
struct hci_all_pipe_cleared_noti *cleared_info;
pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd);
switch (cmd) {
case NFC_HCI_ADM_NOTIFY_PIPE_CREATED:
if (skb->len != 5) {
r = -EPROTO;
break;
status = NFC_HCI_ANY_E_NOK;
goto exit;
}
create_info = (struct hci_create_pipe_resp *)skb->data;
local_gate = skb->data[3];
new_pipe = skb->data[4];
nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
NFC_HCI_ANY_OK, NULL, 0, NULL, NULL, 0);
/* save the new created pipe and bind with local gate,
/* Save the new created pipe and bind with local gate,
* the description for skb->data[3] is destination gate id
* but since we received this cmd from host controller, we
* are the destination and it is our local gate
*/
hdev->gate2pipe[local_gate] = new_pipe;
hdev->gate2pipe[create_info->dest_gate] = create_info->pipe;
hdev->pipes[create_info->pipe].gate = create_info->dest_gate;
hdev->pipes[create_info->pipe].dest_host =
create_info->src_host;
break;
case NFC_HCI_ANY_OPEN_PIPE:
/* if the pipe is already created, we allow remote host to
* open it
*/
if (gate != 0xff)
nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
NFC_HCI_ANY_OK, &gate_opened, 1,
NULL, NULL, 0);
if (gate == NFC_HCI_INVALID_GATE) {
status = NFC_HCI_ANY_E_NOK;
goto exit;
}
break;
case NFC_HCI_ADM_NOTIFY_PIPE_DELETED:
if (skb->len != 1) {
status = NFC_HCI_ANY_E_NOK;
goto exit;
}
delete_info = (struct hci_delete_pipe_noti *)skb->data;
hdev->pipes[delete_info->pipe].gate = NFC_HCI_INVALID_GATE;
hdev->pipes[delete_info->pipe].dest_host = NFC_HCI_INVALID_HOST;
break;
case NFC_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED:
nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
NFC_HCI_ANY_OK, NULL, 0, NULL, NULL, 0);
if (skb->len != 1) {
status = NFC_HCI_ANY_E_NOK;
goto exit;
}
cleared_info = (struct hci_all_pipe_cleared_noti *)skb->data;
nfc_hci_reset_pipes_per_host(hdev, cleared_info->host);
break;
default:
pr_info("Discarded unknown cmd %x to gate %x\n", cmd, gate);
r = -EINVAL;
break;
}
exit:
nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_RESPONSE,
status, NULL, 0, NULL, NULL, 0);
kfree_skb(skb);
}

8
net/nfc/hci/hci.h
View file

@ -65,6 +65,14 @@ struct hci_create_pipe_resp {
u8 pipe;
} __packed;
struct hci_delete_pipe_noti {
u8 pipe;
} __packed;
struct hci_all_pipe_cleared_noti {
u8 host;
} __packed;
#define NFC_HCI_FRAGMENT 0x7f
#define HCP_HEADER(type, instr) ((((type) & 0x03) << 6) | ((instr) & 0x3f))