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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * The NFC Controller Interface is the communication protocol between an
- * NFC Controller (NFCC) and a Device Host (DH).
- *
- * Copyright (C) 2011 Texas Instruments, Inc.
- * Copyright (C) 2014 Marvell International Ltd.
- *
- * Written by Ilan Elias <ilane@ti.com>
- *
- * Acknowledgements:
- * This file is based on hci_core.c, which was written
- * by Maxim Krasnyansky.
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/workqueue.h>
- #include <linux/completion.h>
- #include <linux/export.h>
- #include <linux/sched.h>
- #include <linux/bitops.h>
- #include <linux/skbuff.h>
- #include "../nfc.h"
- #include <net/nfc/nci.h>
- #include <net/nfc/nci_core.h>
- #include <linux/nfc.h>
- struct core_conn_create_data {
- int length;
- struct nci_core_conn_create_cmd *cmd;
- };
- static void nci_cmd_work(struct work_struct *work);
- static void nci_rx_work(struct work_struct *work);
- static void nci_tx_work(struct work_struct *work);
- struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
- int conn_id)
- {
- struct nci_conn_info *conn_info;
- list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
- if (conn_info->conn_id == conn_id)
- return conn_info;
- }
- return NULL;
- }
- 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) {
- if (conn_info->dest_type == dest_type) {
- if (!params)
- return conn_info->conn_id;
- if (params->id == conn_info->dest_params->id &&
- params->protocol == conn_info->dest_params->protocol)
- return conn_info->conn_id;
- }
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params);
- /* ---- NCI requests ---- */
- void nci_req_complete(struct nci_dev *ndev, int result)
- {
- if (ndev->req_status == NCI_REQ_PEND) {
- ndev->req_result = result;
- ndev->req_status = NCI_REQ_DONE;
- complete(&ndev->req_completion);
- }
- }
- EXPORT_SYMBOL(nci_req_complete);
- static void nci_req_cancel(struct nci_dev *ndev, int err)
- {
- if (ndev->req_status == NCI_REQ_PEND) {
- ndev->req_result = err;
- ndev->req_status = NCI_REQ_CANCELED;
- complete(&ndev->req_completion);
- }
- }
- /* Execute request and wait for completion. */
- static int __nci_request(struct nci_dev *ndev,
- void (*req)(struct nci_dev *ndev, unsigned long opt),
- unsigned long opt, __u32 timeout)
- {
- int rc = 0;
- long completion_rc;
- ndev->req_status = NCI_REQ_PEND;
- reinit_completion(&ndev->req_completion);
- req(ndev, opt);
- completion_rc =
- wait_for_completion_interruptible_timeout(&ndev->req_completion,
- timeout);
- pr_debug("wait_for_completion return %ld\n", completion_rc);
- if (completion_rc > 0) {
- switch (ndev->req_status) {
- case NCI_REQ_DONE:
- rc = nci_to_errno(ndev->req_result);
- break;
- case NCI_REQ_CANCELED:
- rc = -ndev->req_result;
- break;
- default:
- 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;
- }
- 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;
- }
- 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);
- }
- 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 ||
- param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
- cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
- NCI_NFC_F_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_ISO15693_MASK)) {
- cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
- NCI_NFC_V_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 - 1) &&
- (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
- cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
- NCI_NFC_A_PASSIVE_LISTEN_MODE;
- cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
- cmd.num_disc_configs++;
- cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
- NCI_NFC_F_PASSIVE_LISTEN_MODE;
- cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
- cmd.num_disc_configs++;
- }
- nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
- (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
- &cmd);
- }
- struct nci_rf_discover_select_param {
- __u8 rf_discovery_id;
- __u8 rf_protocol;
- };
- 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;
- 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);
- }
- 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 = 0;
- }
- 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");
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