diff options
Diffstat (limited to 'kernel/net/nfc/nci')
| -rw-r--r-- | kernel/net/nfc/nci/Kconfig | 9 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/Makefile | 6 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/core.c | 217 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/data.c | 13 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/hci.c | 176 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/ntf.c | 11 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/rsp.c | 11 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/spi.c | 11 | ||||
| -rw-r--r-- | kernel/net/nfc/nci/uart.c | 494 |
9 files changed, 891 insertions, 57 deletions
diff --git a/kernel/net/nfc/nci/Kconfig b/kernel/net/nfc/nci/Kconfig index a4f1e42e3..85d4819ab 100644 --- a/kernel/net/nfc/nci/Kconfig +++ b/kernel/net/nfc/nci/Kconfig @@ -12,10 +12,17 @@ config NFC_NCI config NFC_NCI_SPI depends on NFC_NCI && SPI select CRC_CCITT - bool "NCI over SPI protocol support" + tristate "NCI over SPI protocol support" default n help NCI (NFC Controller Interface) is a communication protocol between an NFC Controller (NFCC) and a Device Host (DH). Say yes if you use an NCI driver that requires SPI link layer. + +config NFC_NCI_UART + depends on NFC_NCI && TTY + tristate "NCI over UART protocol support" + default n + help + Say yes if you use an NCI driver that requires UART link layer. diff --git a/kernel/net/nfc/nci/Makefile b/kernel/net/nfc/nci/Makefile index 7ed894926..0ca31d9bf 100644 --- a/kernel/net/nfc/nci/Makefile +++ b/kernel/net/nfc/nci/Makefile @@ -6,4 +6,8 @@ obj-$(CONFIG_NFC_NCI) += nci.o nci-objs := core.o data.o lib.o ntf.o rsp.o hci.o -nci-$(CONFIG_NFC_NCI_SPI) += spi.o +nci_spi-y += spi.o +obj-$(CONFIG_NFC_NCI_SPI) += nci_spi.o + +nci_uart-y += uart.o +obj-$(CONFIG_NFC_NCI_UART) += nci_uart.o diff --git a/kernel/net/nfc/nci/core.c b/kernel/net/nfc/nci/core.c index 49ff32106..10c99a578 100644 --- a/kernel/net/nfc/nci/core.c +++ b/kernel/net/nfc/nci/core.c @@ -28,6 +28,7 @@ #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> @@ -63,6 +64,19 @@ struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev, return NULL; } +int nci_get_conn_info_by_id(struct nci_dev *ndev, u8 id) +{ + struct nci_conn_info *conn_info; + + list_for_each_entry(conn_info, &ndev->conn_info_list, list) { + if (conn_info->id == id) + return conn_info->conn_id; + } + + return -EINVAL; +} +EXPORT_SYMBOL(nci_get_conn_info_by_id); + /* ---- NCI requests ---- */ void nci_req_complete(struct nci_dev *ndev, int result) @@ -73,6 +87,7 @@ void nci_req_complete(struct nci_dev *ndev, int result) complete(&ndev->req_completion); } } +EXPORT_SYMBOL(nci_req_complete); static void nci_req_cancel(struct nci_dev *ndev, int err) { @@ -323,6 +338,60 @@ static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt) 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); + static int nci_open_device(struct nci_dev *ndev) { int rc = 0; @@ -343,17 +412,26 @@ static int nci_open_device(struct nci_dev *ndev) set_bit(NCI_INIT, &ndev->flags); - rc = __nci_request(ndev, nci_reset_req, 0, - msecs_to_jiffies(NCI_RESET_TIMEOUT)); + 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 (ndev->ops->setup) - ndev->ops->setup(ndev); + 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)); @@ -407,6 +485,12 @@ static int nci_close_device(struct nci_dev *ndev) 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); @@ -414,10 +498,6 @@ static int nci_close_device(struct nci_dev *ndev) /* Flush cmd wq */ flush_workqueue(ndev->cmd_wq); - /* After this point our queues are empty - * and no works are scheduled. */ - ndev->ops->close(ndev); - /* Clear flags */ ndev->flags = 0; @@ -486,7 +566,7 @@ static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt) int nci_nfcee_discover(struct nci_dev *ndev, u8 action) { - return nci_request(ndev, nci_nfcee_discover_req, action, + return __nci_request(ndev, nci_nfcee_discover_req, action, msecs_to_jiffies(NCI_CMD_TIMEOUT)); } EXPORT_SYMBOL(nci_nfcee_discover); @@ -507,8 +587,9 @@ int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode) 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)); + return __nci_request(ndev, nci_nfcee_mode_set_req, + (unsigned long)&cmd, + msecs_to_jiffies(NCI_CMD_TIMEOUT)); } EXPORT_SYMBOL(nci_nfcee_mode_set); @@ -534,12 +615,19 @@ int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type, if (!cmd) return -ENOMEM; + if (!number_destination_params) + return -EINVAL; + cmd->destination_type = destination_type; cmd->number_destination_params = number_destination_params; memcpy(cmd->params, params, params_len); data.cmd = cmd; - ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX]; + + if (params->length > 0) + ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX]; + else + ndev->cur_id = 0; r = __nci_request(ndev, nci_core_conn_create_req, (unsigned long)&data, @@ -558,8 +646,8 @@ static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt) int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id) { - return nci_request(ndev, nci_core_conn_close_req, conn_id, - msecs_to_jiffies(NCI_CMD_TIMEOUT)); + return __nci_request(ndev, nci_core_conn_close_req, conn_id, + msecs_to_jiffies(NCI_CMD_TIMEOUT)); } EXPORT_SYMBOL(nci_core_conn_close); @@ -747,9 +835,11 @@ static int nci_activate_target(struct nfc_dev *nfc_dev, } static void nci_deactivate_target(struct nfc_dev *nfc_dev, - struct nfc_target *target) + 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"); @@ -760,9 +850,14 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev, 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_DEACTIVATE_TYPE_SLEEP_MODE, + nci_request(ndev, nci_rf_deactivate_req, nci_mode, msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); } } @@ -796,7 +891,7 @@ static int nci_dep_link_down(struct nfc_dev *nfc_dev) pr_debug("entry\n"); if (nfc_dev->rf_mode == NFC_RF_INITIATOR) { - nci_deactivate_target(nfc_dev, NULL); + 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) { @@ -961,6 +1056,14 @@ struct nci_dev *nci_allocate_device(struct nci_ops *ops, 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); @@ -1115,7 +1218,7 @@ int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) } EXPORT_SYMBOL(nci_recv_frame); -static int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) +int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) { pr_debug("len %d\n", skb->len); @@ -1133,6 +1236,7 @@ static int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb) 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) @@ -1164,6 +1268,81 @@ int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) 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 ---- */ diff --git a/kernel/net/nfc/nci/data.c b/kernel/net/nfc/nci/data.c index 566466d90..dbd242544 100644 --- a/kernel/net/nfc/nci/data.c +++ b/kernel/net/nfc/nci/data.c @@ -90,6 +90,18 @@ static inline void nci_push_data_hdr(struct nci_dev *ndev, nci_pbf_set((__u8 *)hdr, pbf); } +int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id) +{ + struct nci_conn_info *conn_info; + + conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id); + if (!conn_info) + return -EPROTO; + + return conn_info->max_pkt_payload_len; +} +EXPORT_SYMBOL(nci_conn_max_data_pkt_payload_size); + static int nci_queue_tx_data_frags(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb) { @@ -203,6 +215,7 @@ free_exit: exit: return rc; } +EXPORT_SYMBOL(nci_send_data); /* ----------------- NCI RX Data ----------------- */ diff --git a/kernel/net/nfc/nci/hci.c b/kernel/net/nfc/nci/hci.c index b33fed6d1..2aedac15c 100644 --- a/kernel/net/nfc/nci/hci.c +++ b/kernel/net/nfc/nci/hci.c @@ -70,6 +70,7 @@ struct nci_hcp_packet { #define NCI_HCI_ANY_SET_PARAMETER 0x01 #define NCI_HCI_ANY_GET_PARAMETER 0x02 #define NCI_HCI_ANY_CLOSE_PIPE 0x04 +#define NCI_HCI_ADM_CLEAR_ALL_PIPE 0x14 #define NCI_HFP_NO_CHAINING 0x80 @@ -78,6 +79,8 @@ struct nci_hcp_packet { #define NCI_EVT_HOT_PLUG 0x03 #define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01 +#define NCI_HCI_ADM_CREATE_PIPE 0x10 +#define NCI_HCI_ADM_DELETE_PIPE 0x11 /* HCP headers */ #define NCI_HCI_HCP_PACKET_HEADER_LEN 1 @@ -101,6 +104,20 @@ struct nci_hcp_packet { #define NCI_HCP_MSG_GET_CMD(header) (header & 0x3f) #define NCI_HCP_MSG_GET_PIPE(header) (header & 0x7f) +static int nci_hci_result_to_errno(u8 result) +{ + switch (result) { + case NCI_HCI_ANY_OK: + return 0; + case NCI_HCI_ANY_E_REG_PAR_UNKNOWN: + return -EOPNOTSUPP; + case NCI_HCI_ANY_E_TIMEOUT: + return -ETIME; + default: + return -1; + } +} + /* HCI core */ static void nci_hci_reset_pipes(struct nci_hci_dev *hdev) { @@ -146,18 +163,18 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe, if (!conn_info) return -EPROTO; - skb = nci_skb_alloc(ndev, 2 + conn_info->max_pkt_payload_len + + i = 0; + skb = nci_skb_alloc(ndev, conn_info->max_pkt_payload_len + NCI_DATA_HDR_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; - skb_reserve(skb, 2 + NCI_DATA_HDR_SIZE); + skb_reserve(skb, NCI_DATA_HDR_SIZE + 2); *skb_push(skb, 1) = data_type; - i = 0; - len = conn_info->max_pkt_payload_len; - do { + len = conn_info->max_pkt_payload_len; + /* If last packet add NCI_HFP_NO_CHAINING */ if (i + conn_info->max_pkt_payload_len - (skb->len + 1) >= data_len) { @@ -177,9 +194,15 @@ static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe, return r; i += len; + if (i < data_len) { - skb_trim(skb, 0); - skb_pull(skb, len); + skb = nci_skb_alloc(ndev, + conn_info->max_pkt_payload_len + + NCI_DATA_HDR_SIZE, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + skb_reserve(skb, NCI_DATA_HDR_SIZE + 1); } } while (i < data_len); @@ -212,7 +235,8 @@ int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd, const u8 *param, size_t param_len, struct sk_buff **skb) { - struct nci_conn_info *conn_info; + struct nci_hcp_message *message; + struct nci_conn_info *conn_info; struct nci_data data; int r; u8 pipe = ndev->hci_dev->gate2pipe[gate]; @@ -232,14 +256,34 @@ int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd, r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data, msecs_to_jiffies(NCI_DATA_TIMEOUT)); - - if (r == NCI_STATUS_OK && skb) - *skb = conn_info->rx_skb; + if (r == NCI_STATUS_OK) { + message = (struct nci_hcp_message *)conn_info->rx_skb->data; + r = nci_hci_result_to_errno( + NCI_HCP_MSG_GET_CMD(message->header)); + skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN); + + if (!r && skb) + *skb = conn_info->rx_skb; + } return r; } EXPORT_SYMBOL(nci_hci_send_cmd); +int nci_hci_clear_all_pipes(struct nci_dev *ndev) +{ + int r; + + r = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE, + NCI_HCI_ADM_CLEAR_ALL_PIPE, NULL, 0, NULL); + if (r < 0) + return r; + + nci_hci_reset_pipes(ndev->hci_dev); + return r; +} +EXPORT_SYMBOL(nci_hci_clear_all_pipes); + static void nci_hci_event_received(struct nci_dev *ndev, u8 pipe, u8 event, struct sk_buff *skb) { @@ -328,9 +372,6 @@ static void nci_hci_resp_received(struct nci_dev *ndev, u8 pipe, struct nci_conn_info *conn_info; u8 status = result; - if (result != NCI_HCI_ANY_OK) - goto exit; - conn_info = ndev->hci_dev->conn_info; if (!conn_info) { status = NCI_STATUS_REJECTED; @@ -340,7 +381,7 @@ static void nci_hci_resp_received(struct nci_dev *ndev, u8 pipe, conn_info->rx_skb = skb; exit: - nci_req_complete(ndev, status); + nci_req_complete(ndev, NCI_STATUS_OK); } /* Receive hcp message for pipe, with type and cmd. @@ -366,7 +407,7 @@ static void nci_hci_hcp_message_rx(struct nci_dev *ndev, u8 pipe, break; } - nci_req_complete(ndev, 0); + nci_req_complete(ndev, NCI_STATUS_OK); } static void nci_hci_msg_rx_work(struct work_struct *work) @@ -378,7 +419,7 @@ static void nci_hci_msg_rx_work(struct work_struct *work) u8 pipe, type, instruction; while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) { - pipe = skb->data[0]; + pipe = NCI_HCP_MSG_GET_PIPE(skb->data[0]); skb_pull(skb, NCI_HCI_HCP_PACKET_HEADER_LEN); message = (struct nci_hcp_message *)skb->data; type = NCI_HCP_MSG_GET_TYPE(message->header); @@ -395,7 +436,7 @@ void nci_hci_data_received_cb(void *context, { struct nci_dev *ndev = (struct nci_dev *)context; struct nci_hcp_packet *packet; - u8 pipe, type, instruction; + u8 pipe, type; struct sk_buff *hcp_skb; struct sk_buff *frag_skb; int msg_len; @@ -415,7 +456,7 @@ void nci_hci_data_received_cb(void *context, /* it's the last fragment. Does it need re-aggregation? */ if (skb_queue_len(&ndev->hci_dev->rx_hcp_frags)) { - pipe = packet->header & NCI_HCI_FRAGMENT; + pipe = NCI_HCP_MSG_GET_PIPE(packet->header); skb_queue_tail(&ndev->hci_dev->rx_hcp_frags, skb); msg_len = 0; @@ -434,7 +475,7 @@ void nci_hci_data_received_cb(void *context, *skb_put(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN) = pipe; skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) { - msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN; + msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN; memcpy(skb_put(hcp_skb, msg_len), frag_skb->data + NCI_HCI_HCP_PACKET_HEADER_LEN, msg_len); } @@ -452,11 +493,10 @@ void nci_hci_data_received_cb(void *context, packet = (struct nci_hcp_packet *)hcp_skb->data; type = NCI_HCP_MSG_GET_TYPE(packet->message.header); if (type == NCI_HCI_HCP_RESPONSE) { - pipe = packet->header; - instruction = NCI_HCP_MSG_GET_CMD(packet->message.header); - skb_pull(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN + - NCI_HCI_HCP_MESSAGE_HEADER_LEN); - nci_hci_hcp_message_rx(ndev, pipe, type, instruction, hcp_skb); + pipe = NCI_HCP_MSG_GET_PIPE(packet->header); + skb_pull(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN); + nci_hci_hcp_message_rx(ndev, pipe, type, + NCI_STATUS_OK, hcp_skb); } else { skb_queue_tail(&ndev->hci_dev->msg_rx_queue, hcp_skb); schedule_work(&ndev->hci_dev->msg_rx_work); @@ -485,9 +525,47 @@ int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe) } EXPORT_SYMBOL(nci_hci_open_pipe); +static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host, + u8 dest_gate, int *result) +{ + u8 pipe; + struct sk_buff *skb; + struct nci_hci_create_pipe_params params; + struct nci_hci_create_pipe_resp *resp; + + pr_debug("gate=%d\n", dest_gate); + + params.src_gate = NCI_HCI_ADMIN_GATE; + params.dest_host = dest_host; + params.dest_gate = dest_gate; + + *result = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE, + NCI_HCI_ADM_CREATE_PIPE, + (u8 *)¶ms, sizeof(params), &skb); + if (*result < 0) + return NCI_HCI_INVALID_PIPE; + + resp = (struct nci_hci_create_pipe_resp *)skb->data; + pipe = resp->pipe; + kfree_skb(skb); + + pr_debug("pipe created=%d\n", pipe); + + return pipe; +} + +static int nci_hci_delete_pipe(struct nci_dev *ndev, u8 pipe) +{ + pr_debug("\n"); + + return nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE, + NCI_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL); +} + int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx, const u8 *param, size_t param_len) { + struct nci_hcp_message *message; struct nci_conn_info *conn_info; struct nci_data data; int r; @@ -520,6 +598,12 @@ int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx, r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data, msecs_to_jiffies(NCI_DATA_TIMEOUT)); + if (r == NCI_STATUS_OK) { + message = (struct nci_hcp_message *)conn_info->rx_skb->data; + r = nci_hci_result_to_errno( + NCI_HCP_MSG_GET_CMD(message->header)); + skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN); + } kfree(tmp); return r; @@ -529,6 +613,7 @@ EXPORT_SYMBOL(nci_hci_set_param); int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx, struct sk_buff **skb) { + struct nci_hcp_message *message; struct nci_conn_info *conn_info; struct nci_data data; int r; @@ -553,8 +638,15 @@ int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx, r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data, msecs_to_jiffies(NCI_DATA_TIMEOUT)); - if (r == NCI_STATUS_OK) - *skb = conn_info->rx_skb; + if (r == NCI_STATUS_OK) { + message = (struct nci_hcp_message *)conn_info->rx_skb->data; + r = nci_hci_result_to_errno( + NCI_HCP_MSG_GET_CMD(message->header)); + skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN); + + if (!r && skb) + *skb = conn_info->rx_skb; + } return r; } @@ -563,6 +655,7 @@ EXPORT_SYMBOL(nci_hci_get_param); int nci_hci_connect_gate(struct nci_dev *ndev, u8 dest_host, u8 dest_gate, u8 pipe) { + bool pipe_created = false; int r; if (pipe == NCI_HCI_DO_NOT_OPEN_PIPE) @@ -581,12 +674,26 @@ int nci_hci_connect_gate(struct nci_dev *ndev, case NCI_HCI_ADMIN_GATE: pipe = NCI_HCI_ADMIN_PIPE; break; + default: + pipe = nci_hci_create_pipe(ndev, dest_host, dest_gate, &r); + if (pipe < 0) + return r; + pipe_created = true; + break; } open_pipe: r = nci_hci_open_pipe(ndev, pipe); - if (r < 0) + if (r < 0) { + if (pipe_created) { + if (nci_hci_delete_pipe(ndev, pipe) < 0) { + /* TODO: Cannot clean by deleting pipe... + * -> inconsistent state + */ + } + } return r; + } ndev->hci_dev->pipes[pipe].gate = dest_gate; ndev->hci_dev->pipes[pipe].host = dest_host; @@ -639,23 +746,24 @@ int nci_hci_dev_session_init(struct nci_dev *ndev) ndev->hci_dev->init_data.gates[0].gate, ndev->hci_dev->init_data.gates[0].pipe); if (r < 0) - goto exit; + return r; r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY, &skb); if (r < 0) - goto exit; + return r; if (skb->len && skb->len == strlen(ndev->hci_dev->init_data.session_id) && - memcmp(ndev->hci_dev->init_data.session_id, - skb->data, skb->len) == 0 && + !memcmp(ndev->hci_dev->init_data.session_id, skb->data, skb->len) && ndev->ops->hci_load_session) { /* Restore gate<->pipe table from some proprietary location. */ r = ndev->ops->hci_load_session(ndev); + } else { + r = nci_hci_clear_all_pipes(ndev); if (r < 0) goto exit; - } else { + r = nci_hci_dev_connect_gates(ndev, ndev->hci_dev->init_data.gate_count, ndev->hci_dev->init_data.gates); @@ -667,8 +775,6 @@ int nci_hci_dev_session_init(struct nci_dev *ndev) ndev->hci_dev->init_data.session_id, strlen(ndev->hci_dev->init_data.session_id)); } - if (r == 0) - goto exit; exit: kfree_skb(skb); diff --git a/kernel/net/nfc/nci/ntf.c b/kernel/net/nfc/nci/ntf.c index 321807107..2ada2b39e 100644 --- a/kernel/net/nfc/nci/ntf.c +++ b/kernel/net/nfc/nci/ntf.c @@ -758,6 +758,15 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) /* strip the nci control header */ skb_pull(skb, NCI_CTRL_HDR_SIZE); + if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) { + if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) { + pr_err("unsupported ntf opcode 0x%x\n", + ntf_opcode); + } + + goto end; + } + switch (ntf_opcode) { case NCI_OP_CORE_CONN_CREDITS_NTF: nci_core_conn_credits_ntf_packet(ndev, skb); @@ -796,5 +805,7 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) break; } + nci_core_ntf_packet(ndev, ntf_opcode, skb); +end: kfree_skb(skb); } diff --git a/kernel/net/nfc/nci/rsp.c b/kernel/net/nfc/nci/rsp.c index 02486bc2c..9b6eb913d 100644 --- a/kernel/net/nfc/nci/rsp.c +++ b/kernel/net/nfc/nci/rsp.c @@ -296,6 +296,15 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) /* strip the nci control header */ skb_pull(skb, NCI_CTRL_HDR_SIZE); + if (nci_opcode_gid(rsp_opcode) == NCI_GID_PROPRIETARY) { + if (nci_prop_rsp_packet(ndev, rsp_opcode, skb) == -ENOTSUPP) { + pr_err("unsupported rsp opcode 0x%x\n", + rsp_opcode); + } + + goto end; + } + switch (rsp_opcode) { case NCI_OP_CORE_RESET_RSP: nci_core_reset_rsp_packet(ndev, skb); @@ -346,6 +355,8 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) break; } + nci_core_rsp_packet(ndev, rsp_opcode, skb); +end: kfree_skb(skb); /* trigger the next cmd */ diff --git a/kernel/net/nfc/nci/spi.c b/kernel/net/nfc/nci/spi.c index ec250e777..d904cd2f1 100644 --- a/kernel/net/nfc/nci/spi.c +++ b/kernel/net/nfc/nci/spi.c @@ -18,6 +18,8 @@ #define pr_fmt(fmt) "nci_spi: %s: " fmt, __func__ +#include <linux/module.h> + #include <linux/export.h> #include <linux/spi/spi.h> #include <linux/crc-ccitt.h> @@ -56,6 +58,7 @@ static int __nci_spi_send(struct nci_spi *nspi, struct sk_buff *skb, } t.cs_change = cs_change; t.delay_usecs = nspi->xfer_udelay; + t.speed_hz = nspi->xfer_speed_hz; spi_message_init(&m); spi_message_add_tail(&t, &m); @@ -142,7 +145,8 @@ struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi, nspi->acknowledge_mode = acknowledge_mode; nspi->xfer_udelay = delay; - + /* Use controller max SPI speed by default */ + nspi->xfer_speed_hz = 0; nspi->spi = spi; nspi->ndev = ndev; init_completion(&nspi->req_completion); @@ -195,12 +199,14 @@ static struct sk_buff *__nci_spi_read(struct nci_spi *nspi) tx.tx_buf = req; tx.len = 2; tx.cs_change = 0; + tx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&tx, &m); memset(&rx, 0, sizeof(struct spi_transfer)); rx.rx_buf = resp_hdr; rx.len = 2; rx.cs_change = 1; + rx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&rx, &m); ret = spi_sync(nspi->spi, &m); @@ -224,6 +230,7 @@ static struct sk_buff *__nci_spi_read(struct nci_spi *nspi) rx.len = rx_len; rx.cs_change = 0; rx.delay_usecs = nspi->xfer_udelay; + rx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&rx, &m); ret = spi_sync(nspi->spi, &m); @@ -320,3 +327,5 @@ done: return skb; } EXPORT_SYMBOL_GPL(nci_spi_read); + +MODULE_LICENSE("GPL"); diff --git a/kernel/net/nfc/nci/uart.c b/kernel/net/nfc/nci/uart.c new file mode 100644 index 000000000..21d887567 --- /dev/null +++ b/kernel/net/nfc/nci/uart.c @@ -0,0 +1,494 @@ +/* + * Copyright (C) 2015, Marvell International Ltd. + * + * This software file (the "File") is distributed by Marvell International + * Ltd. under the terms of the GNU General Public License Version 2, June 1991 + * (the "License"). You may use, redistribute and/or modify this File in + * accordance with the terms and conditions of the License, a copy of which + * is available on the worldwide web at + * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. + * + * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE + * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE + * ARE EXPRESSLY DISCLAIMED. The License provides additional details about + * this warranty disclaimer. + */ + +/* Inspired (hugely) by HCI LDISC implementation in Bluetooth. + * + * Copyright (C) 2000-2001 Qualcomm Incorporated + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2004-2005 Marcel Holtmann <marcel@holtmann.org> + */ + +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/poll.h> + +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/signal.h> +#include <linux/ioctl.h> +#include <linux/skbuff.h> + +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> + +/* TX states */ +#define NCI_UART_SENDING 1 +#define NCI_UART_TX_WAKEUP 2 + +static struct nci_uart *nci_uart_drivers[NCI_UART_DRIVER_MAX]; + +static inline struct sk_buff *nci_uart_dequeue(struct nci_uart *nu) +{ + struct sk_buff *skb = nu->tx_skb; + + if (!skb) + skb = skb_dequeue(&nu->tx_q); + else + nu->tx_skb = NULL; + + return skb; +} + +static inline int nci_uart_queue_empty(struct nci_uart *nu) +{ + if (nu->tx_skb) + return 0; + + return skb_queue_empty(&nu->tx_q); +} + +static int nci_uart_tx_wakeup(struct nci_uart *nu) +{ + if (test_and_set_bit(NCI_UART_SENDING, &nu->tx_state)) { + set_bit(NCI_UART_TX_WAKEUP, &nu->tx_state); + return 0; + } + + schedule_work(&nu->write_work); + + return 0; +} + +static void nci_uart_write_work(struct work_struct *work) +{ + struct nci_uart *nu = container_of(work, struct nci_uart, write_work); + struct tty_struct *tty = nu->tty; + struct sk_buff *skb; + +restart: + clear_bit(NCI_UART_TX_WAKEUP, &nu->tx_state); + + if (nu->ops.tx_start) + nu->ops.tx_start(nu); + + while ((skb = nci_uart_dequeue(nu))) { + int len; + + set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + len = tty->ops->write(tty, skb->data, skb->len); + skb_pull(skb, len); + if (skb->len) { + nu->tx_skb = skb; + break; + } + kfree_skb(skb); + } + + if (test_bit(NCI_UART_TX_WAKEUP, &nu->tx_state)) + goto restart; + + if (nu->ops.tx_done && nci_uart_queue_empty(nu)) + nu->ops.tx_done(nu); + + clear_bit(NCI_UART_SENDING, &nu->tx_state); +} + +static int nci_uart_set_driver(struct tty_struct *tty, unsigned int driver) +{ + struct nci_uart *nu = NULL; + int ret; + + if (driver >= NCI_UART_DRIVER_MAX) + return -EINVAL; + + if (!nci_uart_drivers[driver]) + return -ENOENT; + + nu = kzalloc(sizeof(*nu), GFP_KERNEL); + if (!nu) + return -ENOMEM; + + memcpy(nu, nci_uart_drivers[driver], sizeof(struct nci_uart)); + nu->tty = tty; + tty->disc_data = nu; + skb_queue_head_init(&nu->tx_q); + INIT_WORK(&nu->write_work, nci_uart_write_work); + spin_lock_init(&nu->rx_lock); + + ret = nu->ops.open(nu); + if (ret) { + tty->disc_data = NULL; + kfree(nu); + } else if (!try_module_get(nu->owner)) { + nu->ops.close(nu); + tty->disc_data = NULL; + kfree(nu); + return -ENOENT; + } + return ret; +} + +/* ------ LDISC part ------ */ + +/* nci_uart_tty_open + * + * Called when line discipline changed to NCI_UART. + * + * Arguments: + * tty pointer to tty info structure + * Return Value: + * 0 if success, otherwise error code + */ +static int nci_uart_tty_open(struct tty_struct *tty) +{ + /* Error if the tty has no write op instead of leaving an exploitable + * hole + */ + if (!tty->ops->write) + return -EOPNOTSUPP; + + tty->disc_data = NULL; + tty->receive_room = 65536; + + /* Flush any pending characters in the driver and line discipline. */ + + /* FIXME: why is this needed. Note don't use ldisc_ref here as the + * open path is before the ldisc is referencable. + */ + + if (tty->ldisc->ops->flush_buffer) + tty->ldisc->ops->flush_buffer(tty); + tty_driver_flush_buffer(tty); + + return 0; +} + +/* nci_uart_tty_close() + * + * Called when the line discipline is changed to something + * else, the tty is closed, or the tty detects a hangup. + */ +static void nci_uart_tty_close(struct tty_struct *tty) +{ + struct nci_uart *nu = (void *)tty->disc_data; + + /* Detach from the tty */ + tty->disc_data = NULL; + + if (!nu) + return; + + if (nu->tx_skb) + kfree_skb(nu->tx_skb); + if (nu->rx_skb) + kfree_skb(nu->rx_skb); + + skb_queue_purge(&nu->tx_q); + + nu->ops.close(nu); + nu->tty = NULL; + module_put(nu->owner); + + cancel_work_sync(&nu->write_work); + + kfree(nu); +} + +/* nci_uart_tty_wakeup() + * + * Callback for transmit wakeup. Called when low level + * device driver can accept more send data. + * + * Arguments: tty pointer to associated tty instance data + * Return Value: None + */ +static void nci_uart_tty_wakeup(struct tty_struct *tty) +{ + struct nci_uart *nu = (void *)tty->disc_data; + + if (!nu) + return; + + clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + + if (tty != nu->tty) + return; + + nci_uart_tx_wakeup(nu); +} + +/* nci_uart_tty_receive() + * + * Called by tty low level driver when receive data is + * available. + * + * Arguments: tty pointer to tty isntance data + * data pointer to received data + * flags pointer to flags for data + * count count of received data in bytes + * + * Return Value: None + */ +static void nci_uart_tty_receive(struct tty_struct *tty, const u8 *data, + char *flags, int count) +{ + struct nci_uart *nu = (void *)tty->disc_data; + + if (!nu || tty != nu->tty) + return; + + spin_lock(&nu->rx_lock); + nu->ops.recv_buf(nu, (void *)data, flags, count); + spin_unlock(&nu->rx_lock); + + tty_unthrottle(tty); +} + +/* nci_uart_tty_ioctl() + * + * Process IOCTL system call for the tty device. + * + * Arguments: + * + * tty pointer to tty instance data + * file pointer to open file object for device + * cmd IOCTL command code + * arg argument for IOCTL call (cmd dependent) + * + * Return Value: Command dependent + */ +static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct nci_uart *nu = (void *)tty->disc_data; + int err = 0; + + switch (cmd) { + case NCIUARTSETDRIVER: + if (!nu) + return nci_uart_set_driver(tty, (unsigned int)arg); + else + return -EBUSY; + break; + default: + err = n_tty_ioctl_helper(tty, file, cmd, arg); + break; + } + + return err; +} + +/* We don't provide read/write/poll interface for user space. */ +static ssize_t nci_uart_tty_read(struct tty_struct *tty, struct file *file, + unsigned char __user *buf, size_t nr) +{ + return 0; +} + +static ssize_t nci_uart_tty_write(struct tty_struct *tty, struct file *file, + const unsigned char *data, size_t count) +{ + return 0; +} + +static unsigned int nci_uart_tty_poll(struct tty_struct *tty, + struct file *filp, poll_table *wait) +{ + return 0; +} + +static int nci_uart_send(struct nci_uart *nu, struct sk_buff *skb) +{ + /* Queue TX packet */ + skb_queue_tail(&nu->tx_q, skb); + + /* Try to start TX (if possible) */ + nci_uart_tx_wakeup(nu); + + return 0; +} + +/* -- Default recv_buf handler -- + * + * This handler supposes that NCI frames are sent over UART link without any + * framing. It reads NCI header, retrieve the packet size and once all packet + * bytes are received it passes it to nci_uart driver for processing. + */ +static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data, + char *flags, int count) +{ + int chunk_len; + + if (!nu->ndev) { + nfc_err(nu->tty->dev, + "receive data from tty but no NCI dev is attached yet, drop buffer\n"); + return 0; + } + + /* Decode all incoming data in packets + * and enqueue then for processing. + */ + while (count > 0) { + /* If this is the first data of a packet, allocate a buffer */ + if (!nu->rx_skb) { + nu->rx_packet_len = -1; + nu->rx_skb = nci_skb_alloc(nu->ndev, + NCI_MAX_PACKET_SIZE, + GFP_KERNEL); + if (!nu->rx_skb) + return -ENOMEM; + } + + /* Eat byte after byte till full packet header is received */ + if (nu->rx_skb->len < NCI_CTRL_HDR_SIZE) { + *skb_put(nu->rx_skb, 1) = *data++; + --count; + continue; + } + + /* Header was received but packet len was not read */ + if (nu->rx_packet_len < 0) + nu->rx_packet_len = NCI_CTRL_HDR_SIZE + + nci_plen(nu->rx_skb->data); + + /* Compute how many bytes are missing and how many bytes can + * be consumed. + */ + chunk_len = nu->rx_packet_len - nu->rx_skb->len; + if (count < chunk_len) + chunk_len = count; + memcpy(skb_put(nu->rx_skb, chunk_len), data, chunk_len); + data += chunk_len; + count -= chunk_len; + + /* Chcek if packet is fully received */ + if (nu->rx_packet_len == nu->rx_skb->len) { + /* Pass RX packet to driver */ + if (nu->ops.recv(nu, nu->rx_skb) != 0) + nfc_err(nu->tty->dev, "corrupted RX packet\n"); + /* Next packet will be a new one */ + nu->rx_skb = NULL; + } + } + + return 0; +} + +/* -- Default recv handler -- */ +static int nci_uart_default_recv(struct nci_uart *nu, struct sk_buff *skb) +{ + return nci_recv_frame(nu->ndev, skb); +} + +int nci_uart_register(struct nci_uart *nu) +{ + if (!nu || !nu->ops.open || + !nu->ops.recv || !nu->ops.close) + return -EINVAL; + + /* Set the send callback */ + nu->ops.send = nci_uart_send; + + /* Install default handlers if not overridden */ + if (!nu->ops.recv_buf) + nu->ops.recv_buf = nci_uart_default_recv_buf; + if (!nu->ops.recv) + nu->ops.recv = nci_uart_default_recv; + + /* Add this driver in the driver list */ + if (nci_uart_drivers[nu->driver]) { + pr_err("driver %d is already registered\n", nu->driver); + return -EBUSY; + } + nci_uart_drivers[nu->driver] = nu; + + pr_info("NCI uart driver '%s [%d]' registered\n", nu->name, nu->driver); + + return 0; +} +EXPORT_SYMBOL_GPL(nci_uart_register); + +void nci_uart_unregister(struct nci_uart *nu) +{ + pr_info("NCI uart driver '%s [%d]' unregistered\n", nu->name, + nu->driver); + + /* Remove this driver from the driver list */ + nci_uart_drivers[nu->driver] = NULL; +} +EXPORT_SYMBOL_GPL(nci_uart_unregister); + +void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl) +{ + struct ktermios new_termios; + + if (!nu->tty) + return; + + down_read(&nu->tty->termios_rwsem); + new_termios = nu->tty->termios; + up_read(&nu->tty->termios_rwsem); + tty_termios_encode_baud_rate(&new_termios, baudrate, baudrate); + + if (flow_ctrl) + new_termios.c_cflag |= CRTSCTS; + else + new_termios.c_cflag &= ~CRTSCTS; + + tty_set_termios(nu->tty, &new_termios); +} +EXPORT_SYMBOL_GPL(nci_uart_set_config); + +static struct tty_ldisc_ops nci_uart_ldisc = { + .magic = TTY_LDISC_MAGIC, + .owner = THIS_MODULE, + .name = "n_nci", + .open = nci_uart_tty_open, + .close = nci_uart_tty_close, + .read = nci_uart_tty_read, + .write = nci_uart_tty_write, + .poll = nci_uart_tty_poll, + .receive_buf = nci_uart_tty_receive, + .write_wakeup = nci_uart_tty_wakeup, + .ioctl = nci_uart_tty_ioctl, +}; + +static int __init nci_uart_init(void) +{ + memset(nci_uart_drivers, 0, sizeof(nci_uart_drivers)); + return tty_register_ldisc(N_NCI, &nci_uart_ldisc); +} + +static void __exit nci_uart_exit(void) +{ + tty_unregister_ldisc(N_NCI); +} + +module_init(nci_uart_init); +module_exit(nci_uart_exit); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("NFC NCI UART driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_LDISC(N_NCI); |