/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
#define pr_fmt(fmt) "hci: %s: " fmt, __func__
#include
#include
#include
#include
#include "hci.h"
/*
* Payload is the HCP message data only. Instruction will be prepended.
* Guarantees that cb will be called upon completion or timeout delay
* counted from the moment the cmd is sent to the transport.
*/
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
u8 type, u8 instruction,
const u8 *payload, size_t payload_len,
data_exchange_cb_t cb, void *cb_context,
unsigned long completion_delay)
{
struct nfc_dev *ndev = hdev->ndev;
struct hci_msg *cmd;
const u8 *ptr = payload;
int hci_len, err;
bool firstfrag = true;
cmd = kzalloc(sizeof(struct hci_msg), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
INIT_LIST_HEAD(&cmd->msg_l);
skb_queue_head_init(&cmd->msg_frags);
cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false;
cmd->cb = cb;
cmd->cb_context = cb_context;
cmd->completion_delay = completion_delay;
hci_len = payload_len + 1;
while (hci_len > 0) {
struct sk_buff *skb;
int skb_len, data_link_len;
struct hcp_packet *packet;
if (NFC_HCI_HCP_PACKET_HEADER_LEN + hci_len <=
hdev->max_data_link_payload)
data_link_len = hci_len;
else
data_link_len = hdev->max_data_link_payload -
NFC_HCI_HCP_PACKET_HEADER_LEN;
skb_len = ndev->tx_headroom + NFC_HCI_HCP_PACKET_HEADER_LEN +
data_link_len + ndev->tx_tailroom;
hci_len -= data_link_len;
skb = alloc_skb(skb_len, GFP_KERNEL);
if (skb == NULL) {
err = -ENOMEM;
goto out_skb_err;
}
skb_reserve(skb, ndev->tx_headroom);
skb_put(skb, NFC_HCI_HCP_PACKET_HEADER_LEN + data_link_len);
/* Only the last fragment will have the cb bit set to 1 */
packet = (struct hcp_packet *)skb->data;
packet->header = pipe;
if (firstfrag) {
firstfrag = false;
packet->message.header = HCP_HEADER(type, instruction);
if (ptr) {
memcpy(packet->message.data, ptr,
data_link_len - 1);
ptr += data_link_len - 1;
}
} else {
memcpy(&packet->message, ptr, data_link_len);
ptr += data_link_len;
}
/* This is the last fragment, set the cb bit */
if (hci_len == 0)
packet->header |= ~NFC_HCI_FRAGMENT;
skb_queue_tail(&cmd->msg_frags, skb);
}
mutex_lock(&hdev->msg_tx_mutex);
if (hdev->shutting_down) {
err = -ESHUTDOWN;
mutex_unlock(&hdev->msg_tx_mutex);
goto out_skb_err;
}
list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
mutex_unlock(&hdev->msg_tx_mutex);
schedule_work(&hdev->msg_tx_work);
return 0;
out_skb_err:
skb_queue_purge(&cmd->msg_frags);
kfree(cmd);
return err;
}
/*
* Receive hcp message for pipe, with type and cmd.
* skb contains optional message data only.
*/
void nfc_hci_hcp_message_rx(struct nfc_hci_dev *hdev, u8 pipe, u8 type,
u8 instruction, struct sk_buff *skb)
{
switch (type) {
case NFC_HCI_HCP_RESPONSE:
nfc_hci_resp_received(hdev, instruction, skb);
break;
case NFC_HCI_HCP_COMMAND:
nfc_hci_cmd_received(hdev, pipe, instruction, skb);
break;
case NFC_HCI_HCP_EVENT:
nfc_hci_event_received(hdev, pipe, instruction, skb);
break;
default:
pr_err("UNKNOWN MSG Type %d, instruction=%d\n",
type, instruction);
kfree_skb(skb);
break;
}
}
30'>30
The Dell DW5570 is a re-branded Sierra Wireless MC8805 which will by
default boot with vid 0x413c and pid 0x81a3. When triggered QDL download
mode, the device switches to pid 0x81a6 and provides the standard TTY
used for firmware upgrade.
Cc: <stable@vger.kernel.org>
Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'include/trace/events/iommu.h')