800 lines
18 KiB
C
800 lines
18 KiB
C
/*
|
|
* 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, write to the
|
|
* Free Software Foundation, Inc.,
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) "hci: %s: " fmt, __func__
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/nfc.h>
|
|
|
|
#include <net/nfc/nfc.h>
|
|
#include <net/nfc/hci.h>
|
|
|
|
#include "hci.h"
|
|
|
|
/* Largest headroom needed for outgoing HCI commands */
|
|
#define HCI_CMDS_HEADROOM 1
|
|
|
|
static void nfc_hci_msg_tx_work(struct work_struct *work)
|
|
{
|
|
struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
|
|
msg_tx_work);
|
|
struct hci_msg *msg;
|
|
struct sk_buff *skb;
|
|
int r = 0;
|
|
|
|
mutex_lock(&hdev->msg_tx_mutex);
|
|
|
|
if (hdev->cmd_pending_msg) {
|
|
if (timer_pending(&hdev->cmd_timer) == 0) {
|
|
if (hdev->cmd_pending_msg->cb)
|
|
hdev->cmd_pending_msg->cb(hdev,
|
|
NFC_HCI_ANY_E_TIMEOUT,
|
|
NULL,
|
|
hdev->
|
|
cmd_pending_msg->
|
|
cb_context);
|
|
kfree(hdev->cmd_pending_msg);
|
|
hdev->cmd_pending_msg = NULL;
|
|
} else
|
|
goto exit;
|
|
}
|
|
|
|
next_msg:
|
|
if (list_empty(&hdev->msg_tx_queue))
|
|
goto exit;
|
|
|
|
msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg, msg_l);
|
|
list_del(&msg->msg_l);
|
|
|
|
pr_debug("msg_tx_queue has a cmd to send\n");
|
|
while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
|
|
r = hdev->ops->xmit(hdev, skb);
|
|
if (r < 0) {
|
|
kfree_skb(skb);
|
|
skb_queue_purge(&msg->msg_frags);
|
|
if (msg->cb)
|
|
msg->cb(hdev, NFC_HCI_ANY_E_NOK, NULL,
|
|
msg->cb_context);
|
|
kfree(msg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (r)
|
|
goto next_msg;
|
|
|
|
if (msg->wait_response == false) {
|
|
kfree(msg);
|
|
goto next_msg;
|
|
}
|
|
|
|
hdev->cmd_pending_msg = msg;
|
|
mod_timer(&hdev->cmd_timer, jiffies +
|
|
msecs_to_jiffies(hdev->cmd_pending_msg->completion_delay));
|
|
|
|
exit:
|
|
mutex_unlock(&hdev->msg_tx_mutex);
|
|
}
|
|
|
|
static void nfc_hci_msg_rx_work(struct work_struct *work)
|
|
{
|
|
struct nfc_hci_dev *hdev = container_of(work, struct nfc_hci_dev,
|
|
msg_rx_work);
|
|
struct sk_buff *skb;
|
|
struct hcp_message *message;
|
|
u8 pipe;
|
|
u8 type;
|
|
u8 instruction;
|
|
|
|
while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
|
|
pipe = skb->data[0];
|
|
skb_pull(skb, NFC_HCI_HCP_PACKET_HEADER_LEN);
|
|
message = (struct hcp_message *)skb->data;
|
|
type = HCP_MSG_GET_TYPE(message->header);
|
|
instruction = HCP_MSG_GET_CMD(message->header);
|
|
skb_pull(skb, NFC_HCI_HCP_MESSAGE_HEADER_LEN);
|
|
|
|
nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, skb);
|
|
}
|
|
}
|
|
|
|
void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
|
|
struct sk_buff *skb)
|
|
{
|
|
mutex_lock(&hdev->msg_tx_mutex);
|
|
|
|
if (hdev->cmd_pending_msg == NULL) {
|
|
kfree_skb(skb);
|
|
goto exit;
|
|
}
|
|
|
|
del_timer_sync(&hdev->cmd_timer);
|
|
|
|
if (hdev->cmd_pending_msg->cb)
|
|
hdev->cmd_pending_msg->cb(hdev, result, skb,
|
|
hdev->cmd_pending_msg->cb_context);
|
|
else
|
|
kfree_skb(skb);
|
|
|
|
kfree(hdev->cmd_pending_msg);
|
|
hdev->cmd_pending_msg = NULL;
|
|
|
|
queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
|
|
|
|
exit:
|
|
mutex_unlock(&hdev->msg_tx_mutex);
|
|
}
|
|
|
|
void nfc_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
|
|
struct sk_buff *skb)
|
|
{
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static u32 nfc_hci_sak_to_protocol(u8 sak)
|
|
{
|
|
switch (NFC_HCI_TYPE_A_SEL_PROT(sak)) {
|
|
case NFC_HCI_TYPE_A_SEL_PROT_MIFARE:
|
|
return NFC_PROTO_MIFARE_MASK;
|
|
case NFC_HCI_TYPE_A_SEL_PROT_ISO14443:
|
|
return NFC_PROTO_ISO14443_MASK;
|
|
case NFC_HCI_TYPE_A_SEL_PROT_DEP:
|
|
return NFC_PROTO_NFC_DEP_MASK;
|
|
case NFC_HCI_TYPE_A_SEL_PROT_ISO14443_DEP:
|
|
return NFC_PROTO_ISO14443_MASK | NFC_PROTO_NFC_DEP_MASK;
|
|
default:
|
|
return 0xffffffff;
|
|
}
|
|
}
|
|
|
|
static int nfc_hci_target_discovered(struct nfc_hci_dev *hdev, u8 gate)
|
|
{
|
|
struct nfc_target *targets;
|
|
struct sk_buff *atqa_skb = NULL;
|
|
struct sk_buff *sak_skb = NULL;
|
|
int r;
|
|
|
|
pr_debug("from gate %d\n", gate);
|
|
|
|
targets = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
|
|
if (targets == NULL)
|
|
return -ENOMEM;
|
|
|
|
switch (gate) {
|
|
case NFC_HCI_RF_READER_A_GATE:
|
|
r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
|
|
NFC_HCI_RF_READER_A_ATQA, &atqa_skb);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
r = nfc_hci_get_param(hdev, NFC_HCI_RF_READER_A_GATE,
|
|
NFC_HCI_RF_READER_A_SAK, &sak_skb);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
if (atqa_skb->len != 2 || sak_skb->len != 1) {
|
|
r = -EPROTO;
|
|
goto exit;
|
|
}
|
|
|
|
targets->supported_protocols =
|
|
nfc_hci_sak_to_protocol(sak_skb->data[0]);
|
|
if (targets->supported_protocols == 0xffffffff) {
|
|
r = -EPROTO;
|
|
goto exit;
|
|
}
|
|
|
|
targets->sens_res = be16_to_cpu(*(u16 *)atqa_skb->data);
|
|
targets->sel_res = sak_skb->data[0];
|
|
|
|
if (hdev->ops->complete_target_discovered) {
|
|
r = hdev->ops->complete_target_discovered(hdev, gate,
|
|
targets);
|
|
if (r < 0)
|
|
goto exit;
|
|
}
|
|
break;
|
|
case NFC_HCI_RF_READER_B_GATE:
|
|
targets->supported_protocols = NFC_PROTO_ISO14443_MASK;
|
|
break;
|
|
default:
|
|
if (hdev->ops->target_from_gate)
|
|
r = hdev->ops->target_from_gate(hdev, gate, targets);
|
|
else
|
|
r = -EPROTO;
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
if (hdev->ops->complete_target_discovered) {
|
|
r = hdev->ops->complete_target_discovered(hdev, gate,
|
|
targets);
|
|
if (r < 0)
|
|
goto exit;
|
|
}
|
|
break;
|
|
}
|
|
|
|
targets->hci_reader_gate = gate;
|
|
|
|
r = nfc_targets_found(hdev->ndev, targets, 1);
|
|
|
|
exit:
|
|
kfree(targets);
|
|
kfree_skb(atqa_skb);
|
|
kfree_skb(sak_skb);
|
|
|
|
return r;
|
|
}
|
|
|
|
void nfc_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
|
|
struct sk_buff *skb)
|
|
{
|
|
int r = 0;
|
|
|
|
switch (event) {
|
|
case NFC_HCI_EVT_TARGET_DISCOVERED:
|
|
if (hdev->poll_started == false) {
|
|
r = -EPROTO;
|
|
goto exit;
|
|
}
|
|
|
|
if (skb->len < 1) { /* no status data? */
|
|
r = -EPROTO;
|
|
goto exit;
|
|
}
|
|
|
|
if (skb->data[0] == 3) {
|
|
/* TODO: Multiple targets in field, none activated
|
|
* poll is supposedly stopped, but there is no
|
|
* single target to activate, so nothing to report
|
|
* up.
|
|
* if we need to restart poll, we must save the
|
|
* protocols from the initial poll and reuse here.
|
|
*/
|
|
}
|
|
|
|
if (skb->data[0] != 0) {
|
|
r = -EPROTO;
|
|
goto exit;
|
|
}
|
|
|
|
r = nfc_hci_target_discovered(hdev,
|
|
nfc_hci_pipe2gate(hdev, pipe));
|
|
break;
|
|
default:
|
|
/* TODO: Unknown events are hardware specific
|
|
* pass them to the driver (needs a new hci_ops) */
|
|
break;
|
|
}
|
|
|
|
exit:
|
|
kfree_skb(skb);
|
|
|
|
if (r) {
|
|
/* TODO: There was an error dispatching the event,
|
|
* how to propagate up to nfc core?
|
|
*/
|
|
}
|
|
}
|
|
|
|
static void nfc_hci_cmd_timeout(unsigned long data)
|
|
{
|
|
struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
|
|
|
|
queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
|
|
}
|
|
|
|
static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
|
|
u8 gates[])
|
|
{
|
|
int r;
|
|
u8 *p = gates;
|
|
while (gate_count--) {
|
|
r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, *p);
|
|
if (r < 0)
|
|
return r;
|
|
p++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_dev_session_init(struct nfc_hci_dev *hdev)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
int r;
|
|
u8 hci_gates[] = { /* NFC_HCI_ADMIN_GATE MUST be first */
|
|
NFC_HCI_ADMIN_GATE, NFC_HCI_LOOPBACK_GATE,
|
|
NFC_HCI_ID_MGMT_GATE, NFC_HCI_LINK_MGMT_GATE,
|
|
NFC_HCI_RF_READER_B_GATE, NFC_HCI_RF_READER_A_GATE
|
|
};
|
|
|
|
r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID,
|
|
NFC_HCI_ADMIN_GATE);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE,
|
|
NFC_HCI_ADMIN_SESSION_IDENTITY, &skb);
|
|
if (r < 0)
|
|
goto disconnect_all;
|
|
|
|
if (skb->len && skb->len == strlen(hdev->init_data.session_id))
|
|
if (memcmp(hdev->init_data.session_id, skb->data,
|
|
skb->len) == 0) {
|
|
/* TODO ELa: restore gate<->pipe table from
|
|
* some TBD location.
|
|
* note: it doesn't seem possible to get the chip
|
|
* currently open gate/pipe table.
|
|
* It is only possible to obtain the supported
|
|
* gate list.
|
|
*/
|
|
|
|
/* goto exit
|
|
* For now, always do a full initialization */
|
|
}
|
|
|
|
r = nfc_hci_disconnect_all_gates(hdev);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
r = hci_dev_connect_gates(hdev, sizeof(hci_gates), hci_gates);
|
|
if (r < 0)
|
|
goto disconnect_all;
|
|
|
|
r = hci_dev_connect_gates(hdev, hdev->init_data.gate_count,
|
|
hdev->init_data.gates);
|
|
if (r < 0)
|
|
goto disconnect_all;
|
|
|
|
r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
|
|
NFC_HCI_ADMIN_SESSION_IDENTITY,
|
|
hdev->init_data.session_id,
|
|
strlen(hdev->init_data.session_id));
|
|
if (r == 0)
|
|
goto exit;
|
|
|
|
disconnect_all:
|
|
nfc_hci_disconnect_all_gates(hdev);
|
|
|
|
exit:
|
|
if (skb)
|
|
kfree_skb(skb);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int hci_dev_version(struct nfc_hci_dev *hdev)
|
|
{
|
|
int r;
|
|
struct sk_buff *skb;
|
|
|
|
r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
|
|
NFC_HCI_ID_MGMT_VERSION_SW, &skb);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (skb->len != 3) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
hdev->sw_romlib = (skb->data[0] & 0xf0) >> 4;
|
|
hdev->sw_patch = skb->data[0] & 0x0f;
|
|
hdev->sw_flashlib_major = skb->data[1];
|
|
hdev->sw_flashlib_minor = skb->data[2];
|
|
|
|
kfree_skb(skb);
|
|
|
|
r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
|
|
NFC_HCI_ID_MGMT_VERSION_HW, &skb);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (skb->len != 3) {
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
hdev->hw_derivative = (skb->data[0] & 0xe0) >> 5;
|
|
hdev->hw_version = skb->data[0] & 0x1f;
|
|
hdev->hw_mpw = (skb->data[1] & 0xc0) >> 6;
|
|
hdev->hw_software = skb->data[1] & 0x3f;
|
|
hdev->hw_bsid = skb->data[2];
|
|
|
|
kfree_skb(skb);
|
|
|
|
pr_info("SOFTWARE INFO:\n");
|
|
pr_info("RomLib : %d\n", hdev->sw_romlib);
|
|
pr_info("Patch : %d\n", hdev->sw_patch);
|
|
pr_info("FlashLib Major : %d\n", hdev->sw_flashlib_major);
|
|
pr_info("FlashLib Minor : %d\n", hdev->sw_flashlib_minor);
|
|
pr_info("HARDWARE INFO:\n");
|
|
pr_info("Derivative : %d\n", hdev->hw_derivative);
|
|
pr_info("HW Version : %d\n", hdev->hw_version);
|
|
pr_info("#MPW : %d\n", hdev->hw_mpw);
|
|
pr_info("Software : %d\n", hdev->hw_software);
|
|
pr_info("BSID Version : %d\n", hdev->hw_bsid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_dev_up(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
|
|
int r = 0;
|
|
|
|
if (hdev->ops->open) {
|
|
r = hdev->ops->open(hdev);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = hci_dev_session_init(hdev);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
|
|
NFC_HCI_EVT_END_OPERATION, NULL, 0);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
if (hdev->ops->hci_ready) {
|
|
r = hdev->ops->hci_ready(hdev);
|
|
if (r < 0)
|
|
goto exit;
|
|
}
|
|
|
|
r = hci_dev_version(hdev);
|
|
if (r < 0)
|
|
goto exit;
|
|
|
|
exit:
|
|
if (r < 0)
|
|
if (hdev->ops->close)
|
|
hdev->ops->close(hdev);
|
|
return r;
|
|
}
|
|
|
|
static int hci_dev_down(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
|
|
|
|
if (hdev->ops->close)
|
|
hdev->ops->close(hdev);
|
|
|
|
memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hci_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
|
|
int r;
|
|
|
|
if (hdev->ops->start_poll)
|
|
r = hdev->ops->start_poll(hdev, protocols);
|
|
else
|
|
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
|
|
NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
|
|
if (r == 0)
|
|
hdev->poll_started = true;
|
|
|
|
return r;
|
|
}
|
|
|
|
static void hci_stop_poll(struct nfc_dev *nfc_dev)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
|
|
|
|
if (hdev->poll_started) {
|
|
nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
|
|
NFC_HCI_EVT_END_OPERATION, NULL, 0);
|
|
hdev->poll_started = false;
|
|
}
|
|
}
|
|
|
|
static int hci_activate_target(struct nfc_dev *nfc_dev,
|
|
struct nfc_target *target, u32 protocol)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void hci_deactivate_target(struct nfc_dev *nfc_dev,
|
|
struct nfc_target *target)
|
|
{
|
|
}
|
|
|
|
static int hci_data_exchange(struct nfc_dev *nfc_dev, struct nfc_target *target,
|
|
struct sk_buff *skb, data_exchange_cb_t cb,
|
|
void *cb_context)
|
|
{
|
|
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
|
|
int r;
|
|
struct sk_buff *res_skb = NULL;
|
|
|
|
pr_debug("target_idx=%d\n", target->idx);
|
|
|
|
switch (target->hci_reader_gate) {
|
|
case NFC_HCI_RF_READER_A_GATE:
|
|
case NFC_HCI_RF_READER_B_GATE:
|
|
if (hdev->ops->data_exchange) {
|
|
r = hdev->ops->data_exchange(hdev, target, skb,
|
|
&res_skb);
|
|
if (r <= 0) /* handled */
|
|
break;
|
|
}
|
|
|
|
*skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */
|
|
r = nfc_hci_send_cmd(hdev, target->hci_reader_gate,
|
|
NFC_HCI_WR_XCHG_DATA,
|
|
skb->data, skb->len, &res_skb);
|
|
/*
|
|
* TODO: Check RF Error indicator to make sure data is valid.
|
|
* It seems that HCI cmd can complete without error, but data
|
|
* can be invalid if an RF error occured? Ignore for now.
|
|
*/
|
|
if (r == 0)
|
|
skb_trim(res_skb, res_skb->len - 1); /* RF Err ind */
|
|
break;
|
|
default:
|
|
if (hdev->ops->data_exchange) {
|
|
r = hdev->ops->data_exchange(hdev, target, skb,
|
|
&res_skb);
|
|
if (r == 1)
|
|
r = -ENOTSUPP;
|
|
}
|
|
else
|
|
r = -ENOTSUPP;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
|
|
cb(cb_context, res_skb, r);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct nfc_ops hci_nfc_ops = {
|
|
.dev_up = hci_dev_up,
|
|
.dev_down = hci_dev_down,
|
|
.start_poll = hci_start_poll,
|
|
.stop_poll = hci_stop_poll,
|
|
.activate_target = hci_activate_target,
|
|
.deactivate_target = hci_deactivate_target,
|
|
.data_exchange = hci_data_exchange,
|
|
};
|
|
|
|
struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
|
|
struct nfc_hci_init_data *init_data,
|
|
u32 protocols,
|
|
int tx_headroom,
|
|
int tx_tailroom,
|
|
int max_link_payload)
|
|
{
|
|
struct nfc_hci_dev *hdev;
|
|
|
|
if (ops->xmit == NULL)
|
|
return NULL;
|
|
|
|
if (protocols == 0)
|
|
return NULL;
|
|
|
|
hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
|
|
if (hdev == NULL)
|
|
return NULL;
|
|
|
|
hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
|
|
tx_headroom + HCI_CMDS_HEADROOM,
|
|
tx_tailroom);
|
|
if (!hdev->ndev) {
|
|
kfree(hdev);
|
|
return NULL;
|
|
}
|
|
|
|
hdev->ops = ops;
|
|
hdev->max_data_link_payload = max_link_payload;
|
|
hdev->init_data = *init_data;
|
|
|
|
nfc_set_drvdata(hdev->ndev, hdev);
|
|
|
|
memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
|
|
|
|
return hdev;
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_allocate_device);
|
|
|
|
void nfc_hci_free_device(struct nfc_hci_dev *hdev)
|
|
{
|
|
nfc_free_device(hdev->ndev);
|
|
kfree(hdev);
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_free_device);
|
|
|
|
int nfc_hci_register_device(struct nfc_hci_dev *hdev)
|
|
{
|
|
struct device *dev = &hdev->ndev->dev;
|
|
const char *devname = dev_name(dev);
|
|
char name[32];
|
|
int r = 0;
|
|
|
|
mutex_init(&hdev->msg_tx_mutex);
|
|
|
|
INIT_LIST_HEAD(&hdev->msg_tx_queue);
|
|
|
|
INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
|
|
snprintf(name, sizeof(name), "%s_hci_msg_tx_wq", devname);
|
|
hdev->msg_tx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
|
|
WQ_MEM_RECLAIM, 1);
|
|
if (hdev->msg_tx_wq == NULL) {
|
|
r = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
init_timer(&hdev->cmd_timer);
|
|
hdev->cmd_timer.data = (unsigned long)hdev;
|
|
hdev->cmd_timer.function = nfc_hci_cmd_timeout;
|
|
|
|
skb_queue_head_init(&hdev->rx_hcp_frags);
|
|
|
|
INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
|
|
snprintf(name, sizeof(name), "%s_hci_msg_rx_wq", devname);
|
|
hdev->msg_rx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
|
|
WQ_MEM_RECLAIM, 1);
|
|
if (hdev->msg_rx_wq == NULL) {
|
|
r = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
skb_queue_head_init(&hdev->msg_rx_queue);
|
|
|
|
r = nfc_register_device(hdev->ndev);
|
|
|
|
exit:
|
|
if (r < 0) {
|
|
if (hdev->msg_tx_wq)
|
|
destroy_workqueue(hdev->msg_tx_wq);
|
|
if (hdev->msg_rx_wq)
|
|
destroy_workqueue(hdev->msg_rx_wq);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_register_device);
|
|
|
|
void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
|
|
{
|
|
struct hci_msg *msg;
|
|
|
|
skb_queue_purge(&hdev->rx_hcp_frags);
|
|
skb_queue_purge(&hdev->msg_rx_queue);
|
|
|
|
while ((msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg,
|
|
msg_l)) != NULL) {
|
|
list_del(&msg->msg_l);
|
|
skb_queue_purge(&msg->msg_frags);
|
|
kfree(msg);
|
|
}
|
|
|
|
del_timer_sync(&hdev->cmd_timer);
|
|
|
|
nfc_unregister_device(hdev->ndev);
|
|
|
|
destroy_workqueue(hdev->msg_tx_wq);
|
|
|
|
destroy_workqueue(hdev->msg_rx_wq);
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_unregister_device);
|
|
|
|
void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
|
|
{
|
|
hdev->clientdata = clientdata;
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_set_clientdata);
|
|
|
|
void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
|
|
{
|
|
return hdev->clientdata;
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_get_clientdata);
|
|
|
|
void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
|
|
{
|
|
struct hcp_packet *packet;
|
|
u8 type;
|
|
u8 instruction;
|
|
struct sk_buff *hcp_skb;
|
|
u8 pipe;
|
|
struct sk_buff *frag_skb;
|
|
int msg_len;
|
|
|
|
if (skb == NULL) {
|
|
/* TODO ELa: lower layer had permanent failure, need to
|
|
* propagate that up
|
|
*/
|
|
|
|
skb_queue_purge(&hdev->rx_hcp_frags);
|
|
|
|
return;
|
|
}
|
|
|
|
packet = (struct hcp_packet *)skb->data;
|
|
if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) {
|
|
skb_queue_tail(&hdev->rx_hcp_frags, skb);
|
|
return;
|
|
}
|
|
|
|
/* it's the last fragment. Does it need re-aggregation? */
|
|
if (skb_queue_len(&hdev->rx_hcp_frags)) {
|
|
pipe = packet->header & NFC_HCI_FRAGMENT;
|
|
skb_queue_tail(&hdev->rx_hcp_frags, skb);
|
|
|
|
msg_len = 0;
|
|
skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
|
|
msg_len += (frag_skb->len -
|
|
NFC_HCI_HCP_PACKET_HEADER_LEN);
|
|
}
|
|
|
|
hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN +
|
|
msg_len, GFP_KERNEL);
|
|
if (hcp_skb == NULL) {
|
|
/* TODO ELa: cannot deliver HCP message. How to
|
|
* propagate error up?
|
|
*/
|
|
}
|
|
|
|
*skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe;
|
|
|
|
skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) {
|
|
msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN;
|
|
memcpy(skb_put(hcp_skb, msg_len),
|
|
frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN,
|
|
msg_len);
|
|
}
|
|
|
|
skb_queue_purge(&hdev->rx_hcp_frags);
|
|
} else {
|
|
packet->header &= NFC_HCI_FRAGMENT;
|
|
hcp_skb = skb;
|
|
}
|
|
|
|
/* if this is a response, dispatch immediately to
|
|
* unblock waiting cmd context. Otherwise, enqueue to dispatch
|
|
* in separate context where handler can also execute command.
|
|
*/
|
|
packet = (struct hcp_packet *)hcp_skb->data;
|
|
type = HCP_MSG_GET_TYPE(packet->message.header);
|
|
if (type == NFC_HCI_HCP_RESPONSE) {
|
|
pipe = packet->header;
|
|
instruction = HCP_MSG_GET_CMD(packet->message.header);
|
|
skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN +
|
|
NFC_HCI_HCP_MESSAGE_HEADER_LEN);
|
|
nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
|
|
} else {
|
|
skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
|
|
queue_work(hdev->msg_rx_wq, &hdev->msg_rx_work);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(nfc_hci_recv_frame);
|
|
|
|
MODULE_LICENSE("GPL");
|