// SPDX-License-Identifier: GPL-2.0-only
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/*
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* The NFC Controller Interface is the communication protocol between an
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* NFC Controller (NFCC) and a Device Host (DH).
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2014 Marvell International Ltd.
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*
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* Written by Ilan Elias <ilane@ti.com>
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*
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* Acknowledgements:
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* This file is based on hci_core.c, which was written
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* by Maxim Krasnyansky.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <linux/completion.h>
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#include <linux/export.h>
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#include <linux/sched.h>
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#include <linux/bitops.h>
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#include <linux/skbuff.h>
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#include "../nfc.h"
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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#include <linux/nfc.h>
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struct core_conn_create_data {
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int length;
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struct nci_core_conn_create_cmd *cmd;
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};
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static void nci_cmd_work(struct work_struct *work);
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static void nci_rx_work(struct work_struct *work);
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static void nci_tx_work(struct work_struct *work);
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struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
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int conn_id)
|
{
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struct nci_conn_info *conn_info;
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list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
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if (conn_info->conn_id == conn_id)
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return conn_info;
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}
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|
return NULL;
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}
|
|
int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
|
struct dest_spec_params *params)
|
{
|
struct nci_conn_info *conn_info;
|
|
list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
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if (conn_info->dest_type == dest_type) {
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if (!params)
|
return conn_info->conn_id;
|
|
if (params->id == conn_info->dest_params->id &&
|
params->protocol == conn_info->dest_params->protocol)
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return conn_info->conn_id;
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}
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}
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|
return -EINVAL;
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}
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EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params);
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/* ---- NCI requests ---- */
|
|
void nci_req_complete(struct nci_dev *ndev, int result)
|
{
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if (ndev->req_status == NCI_REQ_PEND) {
|
ndev->req_result = result;
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ndev->req_status = NCI_REQ_DONE;
|
complete(&ndev->req_completion);
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}
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}
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EXPORT_SYMBOL(nci_req_complete);
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|
static void nci_req_cancel(struct nci_dev *ndev, int err)
|
{
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if (ndev->req_status == NCI_REQ_PEND) {
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ndev->req_result = err;
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ndev->req_status = NCI_REQ_CANCELED;
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complete(&ndev->req_completion);
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}
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}
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/* Execute request and wait for completion. */
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static int __nci_request(struct nci_dev *ndev,
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void (*req)(struct nci_dev *ndev, unsigned long opt),
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unsigned long opt, __u32 timeout)
|
{
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int rc = 0;
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long completion_rc;
|
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ndev->req_status = NCI_REQ_PEND;
|
|
reinit_completion(&ndev->req_completion);
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req(ndev, opt);
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completion_rc =
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wait_for_completion_interruptible_timeout(&ndev->req_completion,
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timeout);
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|
pr_debug("wait_for_completion return %ld\n", completion_rc);
|
|
if (completion_rc > 0) {
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switch (ndev->req_status) {
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case NCI_REQ_DONE:
|
rc = nci_to_errno(ndev->req_result);
|
break;
|
|
case NCI_REQ_CANCELED:
|
rc = -ndev->req_result;
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break;
|
|
default:
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rc = -ETIMEDOUT;
|
break;
|
}
|
} else {
|
pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
|
completion_rc);
|
|
rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
|
}
|
|
ndev->req_status = ndev->req_result = 0;
|
|
return rc;
|
}
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|
inline int nci_request(struct nci_dev *ndev,
|
void (*req)(struct nci_dev *ndev,
|
unsigned long opt),
|
unsigned long opt, __u32 timeout)
|
{
|
int rc;
|
|
/* Serialize all requests */
|
mutex_lock(&ndev->req_lock);
|
/* check the state after obtaing the lock against any races
|
* from nci_close_device when the device gets removed.
|
*/
|
if (test_bit(NCI_UP, &ndev->flags))
|
rc = __nci_request(ndev, req, opt, timeout);
|
else
|
rc = -ENETDOWN;
|
mutex_unlock(&ndev->req_lock);
|
|
return rc;
|
}
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|
static void nci_reset_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_core_reset_cmd cmd;
|
|
cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
|
nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
|
}
|
|
static void nci_init_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
|
}
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|
static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_rf_disc_map_cmd cmd;
|
struct disc_map_config *cfg = cmd.mapping_configs;
|
__u8 *num = &cmd.num_mapping_configs;
|
int i;
|
|
/* set rf mapping configurations */
|
*num = 0;
|
|
/* by default mapping is set to NCI_RF_INTERFACE_FRAME */
|
for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
|
if (ndev->supported_rf_interfaces[i] ==
|
NCI_RF_INTERFACE_ISO_DEP) {
|
cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
|
cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
|
NCI_DISC_MAP_MODE_LISTEN;
|
cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
|
(*num)++;
|
} else if (ndev->supported_rf_interfaces[i] ==
|
NCI_RF_INTERFACE_NFC_DEP) {
|
cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
|
cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
|
NCI_DISC_MAP_MODE_LISTEN;
|
cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
|
(*num)++;
|
}
|
|
if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
|
break;
|
}
|
|
nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
|
(1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
|
}
|
|
struct nci_set_config_param {
|
__u8 id;
|
size_t len;
|
__u8 *val;
|
};
|
|
static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
|
struct nci_core_set_config_cmd cmd;
|
|
BUG_ON(param->len > NCI_MAX_PARAM_LEN);
|
|
cmd.num_params = 1;
|
cmd.param.id = param->id;
|
cmd.param.len = param->len;
|
memcpy(cmd.param.val, param->val, param->len);
|
|
nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
|
}
|
|
struct nci_rf_discover_param {
|
__u32 im_protocols;
|
__u32 tm_protocols;
|
};
|
|
static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_rf_discover_param *param =
|
(struct nci_rf_discover_param *)opt;
|
struct nci_rf_disc_cmd cmd;
|
|
cmd.num_disc_configs = 0;
|
|
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
|
(param->im_protocols & NFC_PROTO_JEWEL_MASK ||
|
param->im_protocols & NFC_PROTO_MIFARE_MASK ||
|
param->im_protocols & NFC_PROTO_ISO14443_MASK ||
|
param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
|
cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
|
NCI_NFC_A_PASSIVE_POLL_MODE;
|
cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
|
cmd.num_disc_configs++;
|
}
|
|
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
|
(param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
|
cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
|
NCI_NFC_B_PASSIVE_POLL_MODE;
|
cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
|
cmd.num_disc_configs++;
|
}
|
|
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
|
(param->im_protocols & NFC_PROTO_FELICA_MASK ||
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param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
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cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
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NCI_NFC_F_PASSIVE_POLL_MODE;
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cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
|
cmd.num_disc_configs++;
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}
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|
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
|
(param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
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cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
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NCI_NFC_V_PASSIVE_POLL_MODE;
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cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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cmd.num_disc_configs++;
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}
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|
if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
|
(param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
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cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
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NCI_NFC_A_PASSIVE_LISTEN_MODE;
|
cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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cmd.num_disc_configs++;
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cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
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NCI_NFC_F_PASSIVE_LISTEN_MODE;
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cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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cmd.num_disc_configs++;
|
}
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|
nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
|
(1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
|
&cmd);
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}
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struct nci_rf_discover_select_param {
|
__u8 rf_discovery_id;
|
__u8 rf_protocol;
|
};
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|
static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_rf_discover_select_param *param =
|
(struct nci_rf_discover_select_param *)opt;
|
struct nci_rf_discover_select_cmd cmd;
|
|
cmd.rf_discovery_id = param->rf_discovery_id;
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cmd.rf_protocol = param->rf_protocol;
|
|
switch (cmd.rf_protocol) {
|
case NCI_RF_PROTOCOL_ISO_DEP:
|
cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
|
break;
|
|
case NCI_RF_PROTOCOL_NFC_DEP:
|
cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
|
break;
|
|
default:
|
cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
|
break;
|
}
|
|
nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
|
sizeof(struct nci_rf_discover_select_cmd), &cmd);
|
}
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|
static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_rf_deactivate_cmd cmd;
|
|
cmd.type = opt;
|
|
nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
|
sizeof(struct nci_rf_deactivate_cmd), &cmd);
|
}
|
|
struct nci_cmd_param {
|
__u16 opcode;
|
size_t len;
|
__u8 *payload;
|
};
|
|
static void nci_generic_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_cmd_param *param =
|
(struct nci_cmd_param *)opt;
|
|
nci_send_cmd(ndev, param->opcode, param->len, param->payload);
|
}
|
|
int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
|
{
|
struct nci_cmd_param param;
|
|
param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
|
param.len = len;
|
param.payload = payload;
|
|
return __nci_request(ndev, nci_generic_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_prop_cmd);
|
|
int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload)
|
{
|
struct nci_cmd_param param;
|
|
param.opcode = opcode;
|
param.len = len;
|
param.payload = payload;
|
|
return __nci_request(ndev, nci_generic_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_core_cmd);
|
|
int nci_core_reset(struct nci_dev *ndev)
|
{
|
return __nci_request(ndev, nci_reset_req, 0,
|
msecs_to_jiffies(NCI_RESET_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_core_reset);
|
|
int nci_core_init(struct nci_dev *ndev)
|
{
|
return __nci_request(ndev, nci_init_req, 0,
|
msecs_to_jiffies(NCI_INIT_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_core_init);
|
|
struct nci_loopback_data {
|
u8 conn_id;
|
struct sk_buff *data;
|
};
|
|
static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
|
|
nci_send_data(ndev, data->conn_id, data->data);
|
}
|
|
static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
|
{
|
struct nci_dev *ndev = (struct nci_dev *)context;
|
struct nci_conn_info *conn_info;
|
|
conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
|
if (!conn_info) {
|
nci_req_complete(ndev, NCI_STATUS_REJECTED);
|
return;
|
}
|
|
conn_info->rx_skb = skb;
|
|
nci_req_complete(ndev, NCI_STATUS_OK);
|
}
|
|
int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
|
struct sk_buff **resp)
|
{
|
int r;
|
struct nci_loopback_data loopback_data;
|
struct nci_conn_info *conn_info;
|
struct sk_buff *skb;
|
int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
|
NCI_DESTINATION_NFCC_LOOPBACK, NULL);
|
|
if (conn_id < 0) {
|
r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
|
0, 0, NULL);
|
if (r != NCI_STATUS_OK)
|
return r;
|
|
conn_id = nci_get_conn_info_by_dest_type_params(ndev,
|
NCI_DESTINATION_NFCC_LOOPBACK,
|
NULL);
|
}
|
|
conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
|
if (!conn_info)
|
return -EPROTO;
|
|
/* store cb and context to be used on receiving data */
|
conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
|
conn_info->data_exchange_cb_context = ndev;
|
|
skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
|
if (!skb)
|
return -ENOMEM;
|
|
skb_reserve(skb, NCI_DATA_HDR_SIZE);
|
skb_put_data(skb, data, data_len);
|
|
loopback_data.conn_id = conn_id;
|
loopback_data.data = skb;
|
|
ndev->cur_conn_id = conn_id;
|
r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data,
|
msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
if (r == NCI_STATUS_OK && resp)
|
*resp = conn_info->rx_skb;
|
|
return r;
|
}
|
EXPORT_SYMBOL(nci_nfcc_loopback);
|
|
static int nci_open_device(struct nci_dev *ndev)
|
{
|
int rc = 0;
|
|
mutex_lock(&ndev->req_lock);
|
|
if (test_bit(NCI_UNREG, &ndev->flags)) {
|
rc = -ENODEV;
|
goto done;
|
}
|
|
if (test_bit(NCI_UP, &ndev->flags)) {
|
rc = -EALREADY;
|
goto done;
|
}
|
|
if (ndev->ops->open(ndev)) {
|
rc = -EIO;
|
goto done;
|
}
|
|
atomic_set(&ndev->cmd_cnt, 1);
|
|
set_bit(NCI_INIT, &ndev->flags);
|
|
if (ndev->ops->init)
|
rc = ndev->ops->init(ndev);
|
|
if (!rc) {
|
rc = __nci_request(ndev, nci_reset_req, 0,
|
msecs_to_jiffies(NCI_RESET_TIMEOUT));
|
}
|
|
if (!rc && ndev->ops->setup) {
|
rc = ndev->ops->setup(ndev);
|
}
|
|
if (!rc) {
|
rc = __nci_request(ndev, nci_init_req, 0,
|
msecs_to_jiffies(NCI_INIT_TIMEOUT));
|
}
|
|
if (!rc && ndev->ops->post_setup)
|
rc = ndev->ops->post_setup(ndev);
|
|
if (!rc) {
|
rc = __nci_request(ndev, nci_init_complete_req, 0,
|
msecs_to_jiffies(NCI_INIT_TIMEOUT));
|
}
|
|
clear_bit(NCI_INIT, &ndev->flags);
|
|
if (!rc) {
|
set_bit(NCI_UP, &ndev->flags);
|
nci_clear_target_list(ndev);
|
atomic_set(&ndev->state, NCI_IDLE);
|
} else {
|
/* Init failed, cleanup */
|
skb_queue_purge(&ndev->cmd_q);
|
skb_queue_purge(&ndev->rx_q);
|
skb_queue_purge(&ndev->tx_q);
|
|
ndev->ops->close(ndev);
|
ndev->flags &= BIT(NCI_UNREG);
|
}
|
|
done:
|
mutex_unlock(&ndev->req_lock);
|
return rc;
|
}
|
|
static int nci_close_device(struct nci_dev *ndev)
|
{
|
nci_req_cancel(ndev, ENODEV);
|
|
/* This mutex needs to be held as a barrier for
|
* caller nci_unregister_device
|
*/
|
mutex_lock(&ndev->req_lock);
|
|
if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
|
/* Need to flush the cmd wq in case
|
* there is a queued/running cmd_work
|
*/
|
flush_workqueue(ndev->cmd_wq);
|
del_timer_sync(&ndev->cmd_timer);
|
del_timer_sync(&ndev->data_timer);
|
mutex_unlock(&ndev->req_lock);
|
return 0;
|
}
|
|
/* Drop RX and TX queues */
|
skb_queue_purge(&ndev->rx_q);
|
skb_queue_purge(&ndev->tx_q);
|
|
/* Flush RX and TX wq */
|
flush_workqueue(ndev->rx_wq);
|
flush_workqueue(ndev->tx_wq);
|
|
/* Reset device */
|
skb_queue_purge(&ndev->cmd_q);
|
atomic_set(&ndev->cmd_cnt, 1);
|
|
set_bit(NCI_INIT, &ndev->flags);
|
__nci_request(ndev, nci_reset_req, 0,
|
msecs_to_jiffies(NCI_RESET_TIMEOUT));
|
|
/* After this point our queues are empty
|
* and no works are scheduled.
|
*/
|
ndev->ops->close(ndev);
|
|
clear_bit(NCI_INIT, &ndev->flags);
|
|
/* Flush cmd wq */
|
flush_workqueue(ndev->cmd_wq);
|
|
del_timer_sync(&ndev->cmd_timer);
|
|
/* Clear flags except NCI_UNREG */
|
ndev->flags &= BIT(NCI_UNREG);
|
|
mutex_unlock(&ndev->req_lock);
|
|
return 0;
|
}
|
|
/* NCI command timer function */
|
static void nci_cmd_timer(struct timer_list *t)
|
{
|
struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
|
|
atomic_set(&ndev->cmd_cnt, 1);
|
queue_work(ndev->cmd_wq, &ndev->cmd_work);
|
}
|
|
/* NCI data exchange timer function */
|
static void nci_data_timer(struct timer_list *t)
|
{
|
struct nci_dev *ndev = from_timer(ndev, t, data_timer);
|
|
set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
|
queue_work(ndev->rx_wq, &ndev->rx_work);
|
}
|
|
static int nci_dev_up(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
return nci_open_device(ndev);
|
}
|
|
static int nci_dev_down(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
return nci_close_device(ndev);
|
}
|
|
int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
|
{
|
struct nci_set_config_param param;
|
|
if (!val || !len)
|
return 0;
|
|
param.id = id;
|
param.len = len;
|
param.val = val;
|
|
return __nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_set_config);
|
|
static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_nfcee_discover_cmd cmd;
|
__u8 action = opt;
|
|
cmd.discovery_action = action;
|
|
nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
|
}
|
|
int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
|
{
|
return __nci_request(ndev, nci_nfcee_discover_req, action,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_nfcee_discover);
|
|
static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_nfcee_mode_set_cmd *cmd =
|
(struct nci_nfcee_mode_set_cmd *)opt;
|
|
nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
|
sizeof(struct nci_nfcee_mode_set_cmd), cmd);
|
}
|
|
int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
|
{
|
struct nci_nfcee_mode_set_cmd cmd;
|
|
cmd.nfcee_id = nfcee_id;
|
cmd.nfcee_mode = nfcee_mode;
|
|
return __nci_request(ndev, nci_nfcee_mode_set_req,
|
(unsigned long)&cmd,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_nfcee_mode_set);
|
|
static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct core_conn_create_data *data =
|
(struct core_conn_create_data *)opt;
|
|
nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
|
}
|
|
int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
|
u8 number_destination_params,
|
size_t params_len,
|
struct core_conn_create_dest_spec_params *params)
|
{
|
int r;
|
struct nci_core_conn_create_cmd *cmd;
|
struct core_conn_create_data data;
|
|
data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
|
cmd = kzalloc(data.length, GFP_KERNEL);
|
if (!cmd)
|
return -ENOMEM;
|
|
cmd->destination_type = destination_type;
|
cmd->number_destination_params = number_destination_params;
|
|
data.cmd = cmd;
|
|
if (params) {
|
memcpy(cmd->params, params, params_len);
|
if (params->length > 0)
|
memcpy(&ndev->cur_params,
|
¶ms->value[DEST_SPEC_PARAMS_ID_INDEX],
|
sizeof(struct dest_spec_params));
|
else
|
ndev->cur_params.id = 0;
|
} else {
|
ndev->cur_params.id = 0;
|
}
|
ndev->cur_dest_type = destination_type;
|
|
r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
kfree(cmd);
|
return r;
|
}
|
EXPORT_SYMBOL(nci_core_conn_create);
|
|
static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
__u8 conn_id = opt;
|
|
nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
|
}
|
|
int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
|
{
|
ndev->cur_conn_id = conn_id;
|
return __nci_request(ndev, nci_core_conn_close_req, conn_id,
|
msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_core_conn_close);
|
|
static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
struct nci_set_config_param param;
|
int rc;
|
|
param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
|
if ((param.val == NULL) || (param.len == 0))
|
return 0;
|
|
if (param.len > NFC_MAX_GT_LEN)
|
return -EINVAL;
|
|
param.id = NCI_PN_ATR_REQ_GEN_BYTES;
|
|
rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
|
if (rc)
|
return rc;
|
|
param.id = NCI_LN_ATR_RES_GEN_BYTES;
|
|
return nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
|
}
|
|
static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
int rc;
|
__u8 val;
|
|
val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
|
|
rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
|
if (rc)
|
return rc;
|
|
val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
|
|
rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
|
if (rc)
|
return rc;
|
|
val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
|
|
return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
|
}
|
|
static int nci_start_poll(struct nfc_dev *nfc_dev,
|
__u32 im_protocols, __u32 tm_protocols)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
struct nci_rf_discover_param param;
|
int rc;
|
|
if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
|
(atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
|
pr_err("unable to start poll, since poll is already active\n");
|
return -EBUSY;
|
}
|
|
if (ndev->target_active_prot) {
|
pr_err("there is an active target\n");
|
return -EBUSY;
|
}
|
|
if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
|
(atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
|
pr_debug("target active or w4 select, implicitly deactivate\n");
|
|
rc = nci_request(ndev, nci_rf_deactivate_req,
|
NCI_DEACTIVATE_TYPE_IDLE_MODE,
|
msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
|
if (rc)
|
return -EBUSY;
|
}
|
|
if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
|
rc = nci_set_local_general_bytes(nfc_dev);
|
if (rc) {
|
pr_err("failed to set local general bytes\n");
|
return rc;
|
}
|
}
|
|
if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
|
rc = nci_set_listen_parameters(nfc_dev);
|
if (rc)
|
pr_err("failed to set listen parameters\n");
|
}
|
|
param.im_protocols = im_protocols;
|
param.tm_protocols = tm_protocols;
|
rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)¶m,
|
msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
|
|
if (!rc)
|
ndev->poll_prots = im_protocols;
|
|
return rc;
|
}
|
|
static void nci_stop_poll(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
|
(atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
|
pr_err("unable to stop poll, since poll is not active\n");
|
return;
|
}
|
|
nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE,
|
msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
|
}
|
|
static int nci_activate_target(struct nfc_dev *nfc_dev,
|
struct nfc_target *target, __u32 protocol)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
struct nci_rf_discover_select_param param;
|
struct nfc_target *nci_target = NULL;
|
int i;
|
int rc = 0;
|
|
pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
|
|
if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
|
(atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
|
pr_err("there is no available target to activate\n");
|
return -EINVAL;
|
}
|
|
if (ndev->target_active_prot) {
|
pr_err("there is already an active target\n");
|
return -EBUSY;
|
}
|
|
for (i = 0; i < ndev->n_targets; i++) {
|
if (ndev->targets[i].idx == target->idx) {
|
nci_target = &ndev->targets[i];
|
break;
|
}
|
}
|
|
if (!nci_target) {
|
pr_err("unable to find the selected target\n");
|
return -EINVAL;
|
}
|
|
if (!(nci_target->supported_protocols & (1 << protocol))) {
|
pr_err("target does not support the requested protocol 0x%x\n",
|
protocol);
|
return -EINVAL;
|
}
|
|
if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
|
param.rf_discovery_id = nci_target->logical_idx;
|
|
if (protocol == NFC_PROTO_JEWEL)
|
param.rf_protocol = NCI_RF_PROTOCOL_T1T;
|
else if (protocol == NFC_PROTO_MIFARE)
|
param.rf_protocol = NCI_RF_PROTOCOL_T2T;
|
else if (protocol == NFC_PROTO_FELICA)
|
param.rf_protocol = NCI_RF_PROTOCOL_T3T;
|
else if (protocol == NFC_PROTO_ISO14443 ||
|
protocol == NFC_PROTO_ISO14443_B)
|
param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
|
else
|
param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
|
|
rc = nci_request(ndev, nci_rf_discover_select_req,
|
(unsigned long)¶m,
|
msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
|
}
|
|
if (!rc)
|
ndev->target_active_prot = protocol;
|
|
return rc;
|
}
|
|
static void nci_deactivate_target(struct nfc_dev *nfc_dev,
|
struct nfc_target *target,
|
__u8 mode)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
|
|
pr_debug("entry\n");
|
|
if (!ndev->target_active_prot) {
|
pr_err("unable to deactivate target, no active target\n");
|
return;
|
}
|
|
ndev->target_active_prot = 0;
|
|
switch (mode) {
|
case NFC_TARGET_MODE_SLEEP:
|
nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
|
break;
|
}
|
|
if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
|
nci_request(ndev, nci_rf_deactivate_req, nci_mode,
|
msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
|
}
|
}
|
|
static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
|
__u8 comm_mode, __u8 *gb, size_t gb_len)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
int rc;
|
|
pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
|
|
rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
|
if (rc)
|
return rc;
|
|
rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
|
ndev->remote_gb_len);
|
if (!rc)
|
rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
|
NFC_RF_INITIATOR);
|
|
return rc;
|
}
|
|
static int nci_dep_link_down(struct nfc_dev *nfc_dev)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
int rc;
|
|
pr_debug("entry\n");
|
|
if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
|
nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
|
} else {
|
if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
|
atomic_read(&ndev->state) == NCI_DISCOVERY) {
|
nci_request(ndev, nci_rf_deactivate_req, 0,
|
msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
|
}
|
|
rc = nfc_tm_deactivated(nfc_dev);
|
if (rc)
|
pr_err("error when signaling tm deactivation\n");
|
}
|
|
return 0;
|
}
|
|
|
static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
|
struct sk_buff *skb,
|
data_exchange_cb_t cb, void *cb_context)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
int rc;
|
struct nci_conn_info *conn_info;
|
|
conn_info = ndev->rf_conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
|
|
if (!ndev->target_active_prot) {
|
pr_err("unable to exchange data, no active target\n");
|
return -EINVAL;
|
}
|
|
if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
|
return -EBUSY;
|
|
/* store cb and context to be used on receiving data */
|
conn_info->data_exchange_cb = cb;
|
conn_info->data_exchange_cb_context = cb_context;
|
|
rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
|
if (rc)
|
clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
|
|
return rc;
|
}
|
|
static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
int rc;
|
|
rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
|
if (rc)
|
pr_err("unable to send data\n");
|
|
return rc;
|
}
|
|
static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if (ndev->ops->enable_se)
|
return ndev->ops->enable_se(ndev, se_idx);
|
|
return 0;
|
}
|
|
static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if (ndev->ops->disable_se)
|
return ndev->ops->disable_se(ndev, se_idx);
|
|
return 0;
|
}
|
|
static int nci_discover_se(struct nfc_dev *nfc_dev)
|
{
|
int r;
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if (ndev->ops->discover_se) {
|
r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
|
if (r != NCI_STATUS_OK)
|
return -EPROTO;
|
|
return ndev->ops->discover_se(ndev);
|
}
|
|
return 0;
|
}
|
|
static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
|
u8 *apdu, size_t apdu_length,
|
se_io_cb_t cb, void *cb_context)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if (ndev->ops->se_io)
|
return ndev->ops->se_io(ndev, se_idx, apdu,
|
apdu_length, cb, cb_context);
|
|
return 0;
|
}
|
|
static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
|
{
|
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
if (!ndev->ops->fw_download)
|
return -ENOTSUPP;
|
|
return ndev->ops->fw_download(ndev, firmware_name);
|
}
|
|
static struct nfc_ops nci_nfc_ops = {
|
.dev_up = nci_dev_up,
|
.dev_down = nci_dev_down,
|
.start_poll = nci_start_poll,
|
.stop_poll = nci_stop_poll,
|
.dep_link_up = nci_dep_link_up,
|
.dep_link_down = nci_dep_link_down,
|
.activate_target = nci_activate_target,
|
.deactivate_target = nci_deactivate_target,
|
.im_transceive = nci_transceive,
|
.tm_send = nci_tm_send,
|
.enable_se = nci_enable_se,
|
.disable_se = nci_disable_se,
|
.discover_se = nci_discover_se,
|
.se_io = nci_se_io,
|
.fw_download = nci_fw_download,
|
};
|
|
/* ---- Interface to NCI drivers ---- */
|
/**
|
* nci_allocate_device - allocate a new nci device
|
*
|
* @ops: device operations
|
* @supported_protocols: NFC protocols supported by the device
|
*/
|
struct nci_dev *nci_allocate_device(struct nci_ops *ops,
|
__u32 supported_protocols,
|
int tx_headroom, int tx_tailroom)
|
{
|
struct nci_dev *ndev;
|
|
pr_debug("supported_protocols 0x%x\n", supported_protocols);
|
|
if (!ops->open || !ops->close || !ops->send)
|
return NULL;
|
|
if (!supported_protocols)
|
return NULL;
|
|
ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
|
if (!ndev)
|
return NULL;
|
|
ndev->ops = ops;
|
|
if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
|
pr_err("Too many proprietary commands: %zd\n",
|
ops->n_prop_ops);
|
ops->prop_ops = NULL;
|
ops->n_prop_ops = 0;
|
}
|
|
ndev->tx_headroom = tx_headroom;
|
ndev->tx_tailroom = tx_tailroom;
|
init_completion(&ndev->req_completion);
|
|
ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
|
supported_protocols,
|
tx_headroom + NCI_DATA_HDR_SIZE,
|
tx_tailroom);
|
if (!ndev->nfc_dev)
|
goto free_nci;
|
|
ndev->hci_dev = nci_hci_allocate(ndev);
|
if (!ndev->hci_dev)
|
goto free_nfc;
|
|
nfc_set_drvdata(ndev->nfc_dev, ndev);
|
|
return ndev;
|
|
free_nfc:
|
nfc_free_device(ndev->nfc_dev);
|
free_nci:
|
kfree(ndev);
|
return NULL;
|
}
|
EXPORT_SYMBOL(nci_allocate_device);
|
|
/**
|
* nci_free_device - deallocate nci device
|
*
|
* @ndev: The nci device to deallocate
|
*/
|
void nci_free_device(struct nci_dev *ndev)
|
{
|
nfc_free_device(ndev->nfc_dev);
|
nci_hci_deallocate(ndev);
|
kfree(ndev);
|
}
|
EXPORT_SYMBOL(nci_free_device);
|
|
/**
|
* nci_register_device - register a nci device in the nfc subsystem
|
*
|
* @ndev: The nci device to register
|
*/
|
int nci_register_device(struct nci_dev *ndev)
|
{
|
int rc;
|
struct device *dev = &ndev->nfc_dev->dev;
|
char name[32];
|
|
ndev->flags = 0;
|
|
INIT_WORK(&ndev->cmd_work, nci_cmd_work);
|
snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
|
ndev->cmd_wq = create_singlethread_workqueue(name);
|
if (!ndev->cmd_wq) {
|
rc = -ENOMEM;
|
goto exit;
|
}
|
|
INIT_WORK(&ndev->rx_work, nci_rx_work);
|
snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
|
ndev->rx_wq = create_singlethread_workqueue(name);
|
if (!ndev->rx_wq) {
|
rc = -ENOMEM;
|
goto destroy_cmd_wq_exit;
|
}
|
|
INIT_WORK(&ndev->tx_work, nci_tx_work);
|
snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
|
ndev->tx_wq = create_singlethread_workqueue(name);
|
if (!ndev->tx_wq) {
|
rc = -ENOMEM;
|
goto destroy_rx_wq_exit;
|
}
|
|
skb_queue_head_init(&ndev->cmd_q);
|
skb_queue_head_init(&ndev->rx_q);
|
skb_queue_head_init(&ndev->tx_q);
|
|
timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
|
timer_setup(&ndev->data_timer, nci_data_timer, 0);
|
|
mutex_init(&ndev->req_lock);
|
INIT_LIST_HEAD(&ndev->conn_info_list);
|
|
rc = nfc_register_device(ndev->nfc_dev);
|
if (rc)
|
goto destroy_tx_wq_exit;
|
|
goto exit;
|
|
destroy_tx_wq_exit:
|
destroy_workqueue(ndev->tx_wq);
|
|
destroy_rx_wq_exit:
|
destroy_workqueue(ndev->rx_wq);
|
|
destroy_cmd_wq_exit:
|
destroy_workqueue(ndev->cmd_wq);
|
|
exit:
|
return rc;
|
}
|
EXPORT_SYMBOL(nci_register_device);
|
|
/**
|
* nci_unregister_device - unregister a nci device in the nfc subsystem
|
*
|
* @ndev: The nci device to unregister
|
*/
|
void nci_unregister_device(struct nci_dev *ndev)
|
{
|
struct nci_conn_info *conn_info, *n;
|
|
/* This set_bit is not protected with specialized barrier,
|
* However, it is fine because the mutex_lock(&ndev->req_lock);
|
* in nci_close_device() will help to emit one.
|
*/
|
set_bit(NCI_UNREG, &ndev->flags);
|
|
nci_close_device(ndev);
|
|
destroy_workqueue(ndev->cmd_wq);
|
destroy_workqueue(ndev->rx_wq);
|
destroy_workqueue(ndev->tx_wq);
|
|
list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
|
list_del(&conn_info->list);
|
/* conn_info is allocated with devm_kzalloc */
|
}
|
|
nfc_unregister_device(ndev->nfc_dev);
|
}
|
EXPORT_SYMBOL(nci_unregister_device);
|
|
/**
|
* nci_recv_frame - receive frame from NCI drivers
|
*
|
* @ndev: The nci device
|
* @skb: The sk_buff to receive
|
*/
|
int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
|
{
|
pr_debug("len %d\n", skb->len);
|
|
if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
|
!test_bit(NCI_INIT, &ndev->flags))) {
|
kfree_skb(skb);
|
return -ENXIO;
|
}
|
|
/* Queue frame for rx worker thread */
|
skb_queue_tail(&ndev->rx_q, skb);
|
queue_work(ndev->rx_wq, &ndev->rx_work);
|
|
return 0;
|
}
|
EXPORT_SYMBOL(nci_recv_frame);
|
|
int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
|
{
|
pr_debug("len %d\n", skb->len);
|
|
if (!ndev) {
|
kfree_skb(skb);
|
return -ENODEV;
|
}
|
|
/* Get rid of skb owner, prior to sending to the driver. */
|
skb_orphan(skb);
|
|
/* Send copy to sniffer */
|
nfc_send_to_raw_sock(ndev->nfc_dev, skb,
|
RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
|
|
return ndev->ops->send(ndev, skb);
|
}
|
EXPORT_SYMBOL(nci_send_frame);
|
|
/* Send NCI command */
|
int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
|
{
|
struct nci_ctrl_hdr *hdr;
|
struct sk_buff *skb;
|
|
pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
|
|
skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
|
if (!skb) {
|
pr_err("no memory for command\n");
|
return -ENOMEM;
|
}
|
|
hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
|
hdr->gid = nci_opcode_gid(opcode);
|
hdr->oid = nci_opcode_oid(opcode);
|
hdr->plen = plen;
|
|
nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
|
nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
|
|
if (plen)
|
skb_put_data(skb, payload, plen);
|
|
skb_queue_tail(&ndev->cmd_q, skb);
|
queue_work(ndev->cmd_wq, &ndev->cmd_work);
|
|
return 0;
|
}
|
EXPORT_SYMBOL(nci_send_cmd);
|
|
/* Proprietary commands API */
|
static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops,
|
size_t n_ops,
|
__u16 opcode)
|
{
|
size_t i;
|
struct nci_driver_ops *op;
|
|
if (!ops || !n_ops)
|
return NULL;
|
|
for (i = 0; i < n_ops; i++) {
|
op = &ops[i];
|
if (op->opcode == opcode)
|
return op;
|
}
|
|
return NULL;
|
}
|
|
static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
|
struct sk_buff *skb, struct nci_driver_ops *ops,
|
size_t n_ops)
|
{
|
struct nci_driver_ops *op;
|
|
op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
|
if (!op || !op->rsp)
|
return -ENOTSUPP;
|
|
return op->rsp(ndev, skb);
|
}
|
|
static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
|
struct sk_buff *skb, struct nci_driver_ops *ops,
|
size_t n_ops)
|
{
|
struct nci_driver_ops *op;
|
|
op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
|
if (!op || !op->ntf)
|
return -ENOTSUPP;
|
|
return op->ntf(ndev, skb);
|
}
|
|
int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
|
struct sk_buff *skb)
|
{
|
return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
|
ndev->ops->n_prop_ops);
|
}
|
|
int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
|
struct sk_buff *skb)
|
{
|
return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
|
ndev->ops->n_prop_ops);
|
}
|
|
int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
|
struct sk_buff *skb)
|
{
|
return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
|
ndev->ops->n_core_ops);
|
}
|
|
int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
|
struct sk_buff *skb)
|
{
|
return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
|
ndev->ops->n_core_ops);
|
}
|
|
/* ---- NCI TX Data worker thread ---- */
|
|
static void nci_tx_work(struct work_struct *work)
|
{
|
struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
|
struct nci_conn_info *conn_info;
|
struct sk_buff *skb;
|
|
conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
|
if (!conn_info)
|
return;
|
|
pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
|
|
/* Send queued tx data */
|
while (atomic_read(&conn_info->credits_cnt)) {
|
skb = skb_dequeue(&ndev->tx_q);
|
if (!skb)
|
return;
|
|
/* Check if data flow control is used */
|
if (atomic_read(&conn_info->credits_cnt) !=
|
NCI_DATA_FLOW_CONTROL_NOT_USED)
|
atomic_dec(&conn_info->credits_cnt);
|
|
pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
|
nci_pbf(skb->data),
|
nci_conn_id(skb->data),
|
nci_plen(skb->data));
|
|
nci_send_frame(ndev, skb);
|
|
mod_timer(&ndev->data_timer,
|
jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
}
|
}
|
|
/* ----- NCI RX worker thread (data & control) ----- */
|
|
static void nci_rx_work(struct work_struct *work)
|
{
|
struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
|
struct sk_buff *skb;
|
|
while ((skb = skb_dequeue(&ndev->rx_q))) {
|
|
/* Send copy to sniffer */
|
nfc_send_to_raw_sock(ndev->nfc_dev, skb,
|
RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
|
|
/* Process frame */
|
switch (nci_mt(skb->data)) {
|
case NCI_MT_RSP_PKT:
|
nci_rsp_packet(ndev, skb);
|
break;
|
|
case NCI_MT_NTF_PKT:
|
nci_ntf_packet(ndev, skb);
|
break;
|
|
case NCI_MT_DATA_PKT:
|
nci_rx_data_packet(ndev, skb);
|
break;
|
|
default:
|
pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
|
kfree_skb(skb);
|
break;
|
}
|
}
|
|
/* check if a data exchange timout has occurred */
|
if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
|
/* complete the data exchange transaction, if exists */
|
if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
|
nci_data_exchange_complete(ndev, NULL,
|
ndev->cur_conn_id,
|
-ETIMEDOUT);
|
|
clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
|
}
|
}
|
|
/* ----- NCI TX CMD worker thread ----- */
|
|
static void nci_cmd_work(struct work_struct *work)
|
{
|
struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
|
struct sk_buff *skb;
|
|
pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
|
|
/* Send queued command */
|
if (atomic_read(&ndev->cmd_cnt)) {
|
skb = skb_dequeue(&ndev->cmd_q);
|
if (!skb)
|
return;
|
|
atomic_dec(&ndev->cmd_cnt);
|
|
pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
|
nci_pbf(skb->data),
|
nci_opcode_gid(nci_opcode(skb->data)),
|
nci_opcode_oid(nci_opcode(skb->data)),
|
nci_plen(skb->data));
|
|
nci_send_frame(ndev, skb);
|
|
mod_timer(&ndev->cmd_timer,
|
jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
|
}
|
}
|
|
MODULE_LICENSE("GPL");
|
