From 52409fae3e4b8d16b68b61902fc09075cd97b75d Mon Sep 17 00:00:00 2001 From: Dominik Sliwa Date: Sun, 2 Jul 2017 16:41:37 +0200 Subject: Backports generated from 4.11 kernel Initial commit. Signed-off-by: Dominik Sliwa --- net/nfc/nci/core.c | 1549 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1549 insertions(+) create mode 100644 net/nfc/nci/core.c (limited to 'net/nfc/nci/core.c') diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c new file mode 100644 index 0000000..61fff42 --- /dev/null +++ b/net/nfc/nci/core.c @@ -0,0 +1,1549 @@ +/* + * 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 + * + * Acknowledgements: + * This file is based on hci_core.c, which was written + * by Maxim Krasnyansky. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../nfc.h" +#include +#include +#include + +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 (conn_info) { + 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; + + if (!test_bit(NCI_UP, &ndev->flags)) + return -ENETDOWN; + + /* Serialize all requests */ + mutex_lock(&ndev->req_lock); + rc = __nci_request(ndev, req, opt, timeout); + 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); + memcpy(skb_put(skb, data_len), 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_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); + mutex_lock(&ndev->req_lock); + + if (!test_and_clear_bit(NCI_UP, &ndev->flags)) { + 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); + + del_timer_sync(&ndev->cmd_timer); + + /* Flush cmd wq */ + flush_workqueue(ndev->cmd_wq); + + /* Clear flags */ + ndev->flags = 0; + + mutex_unlock(&ndev->req_lock); + + return 0; +} + +/* NCI command timer function */ +static void nci_cmd_timer(unsigned long arg) +{ + struct nci_dev *ndev = (void *) arg; + + atomic_set(&ndev->cmd_cnt, 1); + queue_work(ndev->cmd_wq, &ndev->cmd_work); +} + +/* NCI data exchange timer function */ +static void nci_data_timer(unsigned long arg) +{ + struct nci_dev *ndev = (void *) arg; + + 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: + kfree(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); + kfree(ndev); +} +EXPORT_SYMBOL(nci_free_device); + +/** + * nci_register_device - register a nci device in the nfc subsystem + * + * @dev: 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); + + setup_timer(&ndev->cmd_timer, nci_cmd_timer, + (unsigned long) ndev); + setup_timer(&ndev->data_timer, nci_data_timer, + (unsigned long) ndev); + + mutex_init(&ndev->req_lock); + INIT_LIST_HEAD(&ndev->conn_info_list); + + rc = nfc_register_device(ndev->nfc_dev); + if (rc) + goto destroy_rx_wq_exit; + + goto exit; + +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 + * + * @dev: The nci device to unregister + */ +void nci_unregister_device(struct nci_dev *ndev) +{ + struct nci_conn_info *conn_info, *n; + + 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 = (struct nci_ctrl_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) + memcpy(skb_put(skb, plen), 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"); -- cgit v1.2.3