| // 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, |
| const struct dest_spec_params *params) |
| { |
| const 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, const void *opt), |
| const void *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, |
| const void *opt), |
| const void *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, const void *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, const void *opt) |
| { |
| u8 plen = 0; |
| |
| if (opt) |
| plen = sizeof(struct nci_core_init_v2_cmd); |
| |
| nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, plen, opt); |
| } |
| |
| static void nci_init_complete_req(struct nci_dev *ndev, const void *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; |
| const __u8 *val; |
| }; |
| |
| static void nci_set_config_req(struct nci_dev *ndev, const void *opt) |
| { |
| const struct nci_set_config_param *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, const void *opt) |
| { |
| const struct nci_rf_discover_param *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, const void *opt) |
| { |
| const struct nci_rf_discover_select_param *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, const void *opt) |
| { |
| struct nci_rf_deactivate_cmd cmd; |
| |
| cmd.type = (unsigned long)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; |
| const __u8 *payload; |
| }; |
| |
| static void nci_generic_req(struct nci_dev *ndev, const void *opt) |
| { |
| const struct nci_cmd_param *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, const __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, ¶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, |
| const __u8 *payload) |
| { |
| struct nci_cmd_param param; |
| |
| param.opcode = opcode; |
| param.len = len; |
| param.payload = payload; |
| |
| return __nci_request(ndev, nci_generic_req, ¶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, (void *)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, (void *)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, const void *opt) |
| { |
| const struct nci_loopback_data *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, const 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, &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, (void *)0, |
| msecs_to_jiffies(NCI_RESET_TIMEOUT)); |
| } |
| |
| if (!rc && ndev->ops->setup) { |
| rc = ndev->ops->setup(ndev); |
| } |
| |
| if (!rc) { |
| struct nci_core_init_v2_cmd nci_init_v2_cmd = { |
| .feature1 = NCI_FEATURE_DISABLE, |
| .feature2 = NCI_FEATURE_DISABLE |
| }; |
| const void *opt = NULL; |
| |
| if (ndev->nci_ver & NCI_VER_2_MASK) |
| opt = &nci_init_v2_cmd; |
| |
| rc = __nci_request(ndev, nci_init_req, opt, |
| 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, (void *)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, (void *)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, const __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, ¶m, |
| msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); |
| } |
| EXPORT_SYMBOL(nci_set_config); |
| |
| static void nci_nfcee_discover_req(struct nci_dev *ndev, const void *opt) |
| { |
| struct nci_nfcee_discover_cmd cmd; |
| __u8 action = (unsigned long)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) |
| { |
| unsigned long opt = action; |
| |
| return __nci_request(ndev, nci_nfcee_discover_req, (void *)opt, |
| msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
| } |
| EXPORT_SYMBOL(nci_nfcee_discover); |
| |
| static void nci_nfcee_mode_set_req(struct nci_dev *ndev, const void *opt) |
| { |
| const struct nci_nfcee_mode_set_cmd *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, &cmd, |
| msecs_to_jiffies(NCI_CMD_TIMEOUT)); |
| } |
| EXPORT_SYMBOL(nci_nfcee_mode_set); |
| |
| static void nci_core_conn_create_req(struct nci_dev *ndev, const void *opt) |
| { |
| const struct core_conn_create_data *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, |
| const 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, &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, const void *opt) |
| { |
| __u8 conn_id = (unsigned long)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) |
| { |
| unsigned long opt = conn_id; |
| |
| ndev->cur_conn_id = conn_id; |
| return __nci_request(ndev, nci_core_conn_close_req, (void *)opt, |
| 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, ¶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, ¶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, |
| (void *)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, ¶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, |
| (void *)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; |
| const 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 (protocol >= NFC_PROTO_MAX) { |
| pr_err("the requested nfc protocol is invalid\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, ¶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); |
| unsigned long nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE; |
| |
| 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, (void *)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; |
| |
| 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, (void *)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 const 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 |
| * @tx_headroom: Reserved space at beginning of skb |
| * @tx_tailroom: Reserved space at end of skb |
| */ |
| struct nci_dev *nci_allocate_device(const 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); |
| goto free_nci; |
| } |
| |
| 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, const 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 const struct nci_driver_ops *ops_cmd_lookup(const struct nci_driver_ops *ops, |
| size_t n_ops, |
| __u16 opcode) |
| { |
| size_t i; |
| const 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, const struct nci_driver_ops *ops, |
| size_t n_ops) |
| { |
| const 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, const struct nci_driver_ops *ops, |
| size_t n_ops) |
| { |
| const 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 timeout 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"); |