diff options
Diffstat (limited to 'net/nfc/hci')
| -rw-r--r-- | net/nfc/hci/Makefile | 4 | ||||
| -rw-r--r-- | net/nfc/hci/command.c | 45 | ||||
| -rw-r--r-- | net/nfc/hci/core.c | 336 | ||||
| -rw-r--r-- | net/nfc/hci/hci.h | 15 | ||||
| -rw-r--r-- | net/nfc/hci/hcp.c | 6 | ||||
| -rw-r--r-- | net/nfc/hci/llc.c | 170 | ||||
| -rw-r--r-- | net/nfc/hci/llc.h | 69 | ||||
| -rw-r--r-- | net/nfc/hci/llc_nop.c | 99 | ||||
| -rw-r--r-- | net/nfc/hci/llc_shdlc.c (renamed from net/nfc/hci/shdlc.c) | 544 |
9 files changed, 799 insertions, 489 deletions
diff --git a/net/nfc/hci/Makefile b/net/nfc/hci/Makefile index f9c44b2..c5dbb68 100644 --- a/net/nfc/hci/Makefile +++ b/net/nfc/hci/Makefile @@ -4,5 +4,5 @@ obj-$(CONFIG_NFC_HCI) += hci.o -hci-y := core.o hcp.o command.o -hci-$(CONFIG_NFC_SHDLC) += shdlc.o +hci-y := core.o hcp.o command.o llc.o llc_nop.o +hci-$(CONFIG_NFC_SHDLC) += llc_shdlc.o diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c index 46362ef..71c6a70 100644 --- a/net/nfc/hci/command.c +++ b/net/nfc/hci/command.c @@ -28,10 +28,29 @@ #include "hci.h" -static void nfc_hci_execute_cb(struct nfc_hci_dev *hdev, int err, - struct sk_buff *skb, void *cb_data) +static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, + const u8 *param, size_t param_len, + data_exchange_cb_t cb, void *cb_context) { - struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)cb_data; + pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe, + cmd, param_len); + + /* TODO: Define hci cmd execution delay. Should it be the same + * for all commands? + */ + return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd, + param, param_len, cb, cb_context, 3000); +} + +/* + * HCI command execution completion callback. + * err will be a standard linux error (may be converted from HCI response) + * skb contains the response data and must be disposed, or may be NULL if + * an error occured + */ +static void nfc_hci_execute_cb(void *context, struct sk_buff *skb, int err) +{ + struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)context; pr_debug("HCI Cmd completed with result=%d\n", err); @@ -55,7 +74,8 @@ static int nfc_hci_execute_cmd(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, hcp_ew.exec_complete = false; hcp_ew.result_skb = NULL; - pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len); + pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe, + cmd, param_len); /* TODO: Define hci cmd execution delay. Should it be the same * for all commands? @@ -133,6 +153,23 @@ int nfc_hci_send_cmd(struct nfc_hci_dev *hdev, u8 gate, u8 cmd, } EXPORT_SYMBOL(nfc_hci_send_cmd); +int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd, + const u8 *param, size_t param_len, + data_exchange_cb_t cb, void *cb_context) +{ + u8 pipe; + + pr_debug("\n"); + + pipe = hdev->gate2pipe[gate]; + if (pipe == NFC_HCI_INVALID_PIPE) + return -EADDRNOTAVAIL; + + return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len, + cb, cb_context); +} +EXPORT_SYMBOL(nfc_hci_send_cmd_async); + int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx, const u8 *param, size_t param_len) { diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c index 1ac7b3f..d378d93 100644 --- a/net/nfc/hci/core.c +++ b/net/nfc/hci/core.c @@ -26,6 +26,7 @@ #include <net/nfc/nfc.h> #include <net/nfc/hci.h> +#include <net/nfc/llc.h> #include "hci.h" @@ -57,12 +58,11 @@ static void nfc_hci_msg_tx_work(struct work_struct *work) if (hdev->cmd_pending_msg) { if (timer_pending(&hdev->cmd_timer) == 0) { if (hdev->cmd_pending_msg->cb) - hdev->cmd_pending_msg->cb(hdev, - -ETIME, - NULL, - hdev-> + hdev->cmd_pending_msg->cb(hdev-> cmd_pending_msg-> - cb_context); + cb_context, + NULL, + -ETIME); kfree(hdev->cmd_pending_msg); hdev->cmd_pending_msg = NULL; } else @@ -78,12 +78,12 @@ next_msg: pr_debug("msg_tx_queue has a cmd to send\n"); while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) { - r = hdev->ops->xmit(hdev, skb); + r = nfc_llc_xmit_from_hci(hdev->llc, skb); if (r < 0) { kfree_skb(skb); skb_queue_purge(&msg->msg_frags); if (msg->cb) - msg->cb(hdev, r, NULL, msg->cb_context); + msg->cb(msg->cb_context, NULL, r); kfree(msg); break; } @@ -133,15 +133,15 @@ static void __nfc_hci_cmd_completion(struct nfc_hci_dev *hdev, int err, del_timer_sync(&hdev->cmd_timer); if (hdev->cmd_pending_msg->cb) - hdev->cmd_pending_msg->cb(hdev, err, skb, - hdev->cmd_pending_msg->cb_context); + hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context, + skb, err); else kfree_skb(skb); kfree(hdev->cmd_pending_msg); hdev->cmd_pending_msg = NULL; - queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work); + queue_work(system_nrt_wq, &hdev->msg_tx_work); } void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result, @@ -326,7 +326,7 @@ static void nfc_hci_cmd_timeout(unsigned long data) { struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data; - queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work); + queue_work(system_nrt_wq, &hdev->msg_tx_work); } static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count, @@ -398,8 +398,7 @@ disconnect_all: nfc_hci_disconnect_all_gates(hdev); exit: - if (skb) - kfree_skb(skb); + kfree_skb(skb); return r; } @@ -470,29 +469,38 @@ static int hci_dev_up(struct nfc_dev *nfc_dev) return r; } + r = nfc_llc_start(hdev->llc); + if (r < 0) + goto exit_close; + r = hci_dev_session_init(hdev); if (r < 0) - goto exit; + goto exit_llc; r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); if (r < 0) - goto exit; + goto exit_llc; if (hdev->ops->hci_ready) { r = hdev->ops->hci_ready(hdev); if (r < 0) - goto exit; + goto exit_llc; } r = hci_dev_version(hdev); if (r < 0) - goto exit; + goto exit_llc; + + return 0; + +exit_llc: + nfc_llc_stop(hdev->llc); + +exit_close: + if (hdev->ops->close) + hdev->ops->close(hdev); -exit: - if (r < 0) - if (hdev->ops->close) - hdev->ops->close(hdev); return r; } @@ -500,6 +508,8 @@ static int hci_dev_down(struct nfc_dev *nfc_dev) { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); + nfc_llc_stop(hdev->llc); + if (hdev->ops->close) hdev->ops->close(hdev); @@ -539,13 +549,37 @@ static void hci_deactivate_target(struct nfc_dev *nfc_dev, { } +#define HCI_CB_TYPE_TRANSCEIVE 1 + +static void hci_transceive_cb(void *context, struct sk_buff *skb, int err) +{ + struct nfc_hci_dev *hdev = context; + + switch (hdev->async_cb_type) { + case HCI_CB_TYPE_TRANSCEIVE: + /* + * TODO: Check RF Error indicator to make sure data is valid. + * It seems that HCI cmd can complete without error, but data + * can be invalid if an RF error occured? Ignore for now. + */ + if (err == 0) + skb_trim(skb, skb->len - 1); /* RF Err ind */ + + hdev->async_cb(hdev->async_cb_context, skb, err); + break; + default: + if (err == 0) + kfree_skb(skb); + break; + } +} + static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, struct sk_buff *skb, data_exchange_cb_t cb, void *cb_context) { struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev); int r; - struct sk_buff *res_skb = NULL; pr_debug("target_idx=%d\n", target->idx); @@ -553,40 +587,37 @@ static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, case NFC_HCI_RF_READER_A_GATE: case NFC_HCI_RF_READER_B_GATE: if (hdev->ops->data_exchange) { - r = hdev->ops->data_exchange(hdev, target, skb, - &res_skb); + r = hdev->ops->data_exchange(hdev, target, skb, cb, + cb_context); if (r <= 0) /* handled */ break; } *skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */ - r = nfc_hci_send_cmd(hdev, target->hci_reader_gate, - NFC_HCI_WR_XCHG_DATA, - skb->data, skb->len, &res_skb); - /* - * TODO: Check RF Error indicator to make sure data is valid. - * It seems that HCI cmd can complete without error, but data - * can be invalid if an RF error occured? Ignore for now. - */ - if (r == 0) - skb_trim(res_skb, res_skb->len - 1); /* RF Err ind */ + + hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE; + hdev->async_cb = cb; + hdev->async_cb_context = cb_context; + + r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, + NFC_HCI_WR_XCHG_DATA, skb->data, + skb->len, hci_transceive_cb, hdev); break; default: if (hdev->ops->data_exchange) { - r = hdev->ops->data_exchange(hdev, target, skb, - &res_skb); + r = hdev->ops->data_exchange(hdev, target, skb, cb, + cb_context); if (r == 1) r = -ENOTSUPP; } else r = -ENOTSUPP; + break; } kfree_skb(skb); - cb(cb_context, res_skb, r); - - return 0; + return r; } static int hci_check_presence(struct nfc_dev *nfc_dev, @@ -600,6 +631,93 @@ static int hci_check_presence(struct nfc_dev *nfc_dev, return 0; } +static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err) +{ + mutex_lock(&hdev->msg_tx_mutex); + + if (hdev->cmd_pending_msg == NULL) { + nfc_driver_failure(hdev->ndev, err); + goto exit; + } + + __nfc_hci_cmd_completion(hdev, err, NULL); + +exit: + mutex_unlock(&hdev->msg_tx_mutex); +} + +static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err) +{ + nfc_hci_failure(hdev, err); +} + +static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb) +{ + struct hcp_packet *packet; + u8 type; + u8 instruction; + struct sk_buff *hcp_skb; + u8 pipe; + struct sk_buff *frag_skb; + int msg_len; + + packet = (struct hcp_packet *)skb->data; + if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) { + skb_queue_tail(&hdev->rx_hcp_frags, skb); + return; + } + + /* it's the last fragment. Does it need re-aggregation? */ + if (skb_queue_len(&hdev->rx_hcp_frags)) { + pipe = packet->header & NFC_HCI_FRAGMENT; + skb_queue_tail(&hdev->rx_hcp_frags, skb); + + msg_len = 0; + skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { + msg_len += (frag_skb->len - + NFC_HCI_HCP_PACKET_HEADER_LEN); + } + + hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN + + msg_len, GFP_KERNEL); + if (hcp_skb == NULL) { + nfc_hci_failure(hdev, -ENOMEM); + return; + } + + *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe; + + skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { + msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN; + memcpy(skb_put(hcp_skb, msg_len), + frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN, + msg_len); + } + + skb_queue_purge(&hdev->rx_hcp_frags); + } else { + packet->header &= NFC_HCI_FRAGMENT; + hcp_skb = skb; + } + + /* if this is a response, dispatch immediately to + * unblock waiting cmd context. Otherwise, enqueue to dispatch + * in separate context where handler can also execute command. + */ + packet = (struct hcp_packet *)hcp_skb->data; + type = HCP_MSG_GET_TYPE(packet->message.header); + if (type == NFC_HCI_HCP_RESPONSE) { + pipe = packet->header; + instruction = HCP_MSG_GET_CMD(packet->message.header); + skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN + + NFC_HCI_HCP_MESSAGE_HEADER_LEN); + nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb); + } else { + skb_queue_tail(&hdev->msg_rx_queue, hcp_skb); + queue_work(system_nrt_wq, &hdev->msg_rx_work); + } +} + static struct nfc_ops hci_nfc_ops = { .dev_up = hci_dev_up, .dev_down = hci_dev_down, @@ -614,6 +732,7 @@ static struct nfc_ops hci_nfc_ops = { struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, struct nfc_hci_init_data *init_data, u32 protocols, + const char *llc_name, int tx_headroom, int tx_tailroom, int max_link_payload) @@ -630,10 +749,19 @@ struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops, if (hdev == NULL) return NULL; + hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit, + nfc_hci_recv_from_llc, tx_headroom, + tx_tailroom, nfc_hci_llc_failure); + if (hdev->llc == NULL) { + kfree(hdev); + return NULL; + } + hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols, tx_headroom + HCI_CMDS_HEADROOM, tx_tailroom); if (!hdev->ndev) { + nfc_llc_free(hdev->llc); kfree(hdev); return NULL; } @@ -653,29 +781,18 @@ EXPORT_SYMBOL(nfc_hci_allocate_device); void nfc_hci_free_device(struct nfc_hci_dev *hdev) { nfc_free_device(hdev->ndev); + nfc_llc_free(hdev->llc); kfree(hdev); } EXPORT_SYMBOL(nfc_hci_free_device); int nfc_hci_register_device(struct nfc_hci_dev *hdev) { - struct device *dev = &hdev->ndev->dev; - const char *devname = dev_name(dev); - char name[32]; - int r = 0; - mutex_init(&hdev->msg_tx_mutex); INIT_LIST_HEAD(&hdev->msg_tx_queue); INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work); - snprintf(name, sizeof(name), "%s_hci_msg_tx_wq", devname); - hdev->msg_tx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND | - WQ_MEM_RECLAIM, 1); - if (hdev->msg_tx_wq == NULL) { - r = -ENOMEM; - goto exit; - } init_timer(&hdev->cmd_timer); hdev->cmd_timer.data = (unsigned long)hdev; @@ -684,27 +801,10 @@ int nfc_hci_register_device(struct nfc_hci_dev *hdev) skb_queue_head_init(&hdev->rx_hcp_frags); INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work); - snprintf(name, sizeof(name), "%s_hci_msg_rx_wq", devname); - hdev->msg_rx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND | - WQ_MEM_RECLAIM, 1); - if (hdev->msg_rx_wq == NULL) { - r = -ENOMEM; - goto exit; - } skb_queue_head_init(&hdev->msg_rx_queue); - r = nfc_register_device(hdev->ndev); - -exit: - if (r < 0) { - if (hdev->msg_tx_wq) - destroy_workqueue(hdev->msg_tx_wq); - if (hdev->msg_rx_wq) - destroy_workqueue(hdev->msg_rx_wq); - } - - return r; + return nfc_register_device(hdev->ndev); } EXPORT_SYMBOL(nfc_hci_register_device); @@ -725,9 +825,8 @@ void nfc_hci_unregister_device(struct nfc_hci_dev *hdev) nfc_unregister_device(hdev->ndev); - destroy_workqueue(hdev->msg_tx_wq); - - destroy_workqueue(hdev->msg_rx_wq); + cancel_work_sync(&hdev->msg_tx_work); + cancel_work_sync(&hdev->msg_rx_work); } EXPORT_SYMBOL(nfc_hci_unregister_device); @@ -743,93 +842,30 @@ void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev) } EXPORT_SYMBOL(nfc_hci_get_clientdata); -static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err) -{ - mutex_lock(&hdev->msg_tx_mutex); - - if (hdev->cmd_pending_msg == NULL) { - nfc_driver_failure(hdev->ndev, err); - goto exit; - } - - __nfc_hci_cmd_completion(hdev, err, NULL); - -exit: - mutex_unlock(&hdev->msg_tx_mutex); -} - void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err) { nfc_hci_failure(hdev, err); } EXPORT_SYMBOL(nfc_hci_driver_failure); -void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) +void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb) { - struct hcp_packet *packet; - u8 type; - u8 instruction; - struct sk_buff *hcp_skb; - u8 pipe; - struct sk_buff *frag_skb; - int msg_len; - - packet = (struct hcp_packet *)skb->data; - if ((packet->header & ~NFC_HCI_FRAGMENT) == 0) { - skb_queue_tail(&hdev->rx_hcp_frags, skb); - return; - } - - /* it's the last fragment. Does it need re-aggregation? */ - if (skb_queue_len(&hdev->rx_hcp_frags)) { - pipe = packet->header & NFC_HCI_FRAGMENT; - skb_queue_tail(&hdev->rx_hcp_frags, skb); - - msg_len = 0; - skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { - msg_len += (frag_skb->len - - NFC_HCI_HCP_PACKET_HEADER_LEN); - } - - hcp_skb = nfc_alloc_recv_skb(NFC_HCI_HCP_PACKET_HEADER_LEN + - msg_len, GFP_KERNEL); - if (hcp_skb == NULL) { - nfc_hci_failure(hdev, -ENOMEM); - return; - } - - *skb_put(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN) = pipe; - - skb_queue_walk(&hdev->rx_hcp_frags, frag_skb) { - msg_len = frag_skb->len - NFC_HCI_HCP_PACKET_HEADER_LEN; - memcpy(skb_put(hcp_skb, msg_len), - frag_skb->data + NFC_HCI_HCP_PACKET_HEADER_LEN, - msg_len); - } + nfc_llc_rcv_from_drv(hdev->llc, skb); +} +EXPORT_SYMBOL(nfc_hci_recv_frame); - skb_queue_purge(&hdev->rx_hcp_frags); - } else { - packet->header &= NFC_HCI_FRAGMENT; - hcp_skb = skb; - } +static int __init nfc_hci_init(void) +{ + return nfc_llc_init(); +} - /* if this is a response, dispatch immediately to - * unblock waiting cmd context. Otherwise, enqueue to dispatch - * in separate context where handler can also execute command. - */ - packet = (struct hcp_packet *)hcp_skb->data; - type = HCP_MSG_GET_TYPE(packet->message.header); - if (type == NFC_HCI_HCP_RESPONSE) { - pipe = packet->header; - instruction = HCP_MSG_GET_CMD(packet->message.header); - skb_pull(hcp_skb, NFC_HCI_HCP_PACKET_HEADER_LEN + - NFC_HCI_HCP_MESSAGE_HEADER_LEN); - nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb); - } else { - skb_queue_tail(&hdev->msg_rx_queue, hcp_skb); - queue_work(hdev->msg_rx_wq, &hdev->msg_rx_work); - } +static void __exit nfc_hci_exit(void) +{ + nfc_llc_exit(); } -EXPORT_SYMBOL(nfc_hci_recv_frame); + +subsys_initcall(nfc_hci_init); +module_exit(nfc_hci_exit); MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("NFC HCI Core"); diff --git a/net/nfc/hci/hci.h b/net/nfc/hci/hci.h index fa9a21e..b274d12 100644 --- a/net/nfc/hci/hci.h +++ b/net/nfc/hci/hci.h @@ -20,6 +20,8 @@ #ifndef __LOCAL_HCI_H #define __LOCAL_HCI_H +#include <net/nfc/hci.h> + struct gate_pipe_map { u8 gate; u8 pipe; @@ -35,15 +37,6 @@ struct hcp_packet { struct hcp_message message; } __packed; -/* - * HCI command execution completion callback. - * result will be a standard linux error (may be converted from HCI response) - * skb contains the response data and must be disposed, or may be NULL if - * an error occured - */ -typedef void (*hci_cmd_cb_t) (struct nfc_hci_dev *hdev, int result, - struct sk_buff *skb, void *cb_data); - struct hcp_exec_waiter { wait_queue_head_t *wq; bool exec_complete; @@ -55,7 +48,7 @@ struct hci_msg { struct list_head msg_l; struct sk_buff_head msg_frags; bool wait_response; - hci_cmd_cb_t cb; + data_exchange_cb_t cb; void *cb_context; unsigned long completion_delay; }; @@ -83,7 +76,7 @@ struct hci_create_pipe_resp { int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe, u8 type, u8 instruction, const u8 *payload, size_t payload_len, - hci_cmd_cb_t cb, void *cb_data, + data_exchange_cb_t cb, void *cb_context, unsigned long completion_delay); u8 nfc_hci_pipe2gate(struct nfc_hci_dev *hdev, u8 pipe); diff --git a/net/nfc/hci/hcp.c b/net/nfc/hci/hcp.c index f4dad1a..208eedd 100644 --- a/net/nfc/hci/hcp.c +++ b/net/nfc/hci/hcp.c @@ -35,7 +35,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe, u8 type, u8 instruction, const u8 *payload, size_t payload_len, - hci_cmd_cb_t cb, void *cb_data, + data_exchange_cb_t cb, void *cb_context, unsigned long completion_delay) { struct nfc_dev *ndev = hdev->ndev; @@ -52,7 +52,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe, skb_queue_head_init(&cmd->msg_frags); cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false; cmd->cb = cb; - cmd->cb_context = cb_data; + cmd->cb_context = cb_context; cmd->completion_delay = completion_delay; hci_len = payload_len + 1; @@ -108,7 +108,7 @@ int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe, list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue); mutex_unlock(&hdev->msg_tx_mutex); - queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work); + queue_work(system_nrt_wq, &hdev->msg_tx_work); return 0; diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c new file mode 100644 index 0000000..ae1205d --- /dev/null +++ b/net/nfc/hci/llc.c @@ -0,0 +1,170 @@ +/* + * Link Layer Control manager + * + * Copyright (C) 2012 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions 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, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <net/nfc/llc.h> + +#include "llc.h" + +static struct list_head llc_engines; + +int nfc_llc_init(void) +{ + int r; + + INIT_LIST_HEAD(&llc_engines); + + r = nfc_llc_nop_register(); + if (r) + goto exit; + + r = nfc_llc_shdlc_register(); + if (r) + goto exit; + + return 0; + +exit: + nfc_llc_exit(); + return r; +} + +void nfc_llc_exit(void) +{ + struct nfc_llc_engine *llc_engine, *n; + + list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) { + list_del(&llc_engine->entry); + kfree(llc_engine->name); + kfree(llc_engine); + } +} + +int nfc_llc_register(const char *name, struct nfc_llc_ops *ops) +{ + struct nfc_llc_engine *llc_engine; + + llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL); + if (llc_engine == NULL) + return -ENOMEM; + + llc_engine->name = kstrdup(name, GFP_KERNEL); + if (llc_engine->name == NULL) { + kfree(llc_engine); + return -ENOMEM; + } + llc_engine->ops = ops; + + INIT_LIST_HEAD(&llc_engine->entry); + list_add_tail (&llc_engine->entry, &llc_engines); + + return 0; +} + +static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name) +{ + struct nfc_llc_engine *llc_engine; + + list_for_each_entry(llc_engine, &llc_engines, entry) { + if (strcmp(llc_engine->name, name) == 0) + return llc_engine; + } + + return NULL; +} + +void nfc_llc_unregister(const char *name) +{ + struct nfc_llc_engine *llc_engine; + + llc_engine = nfc_llc_name_to_engine(name); + if (llc_engine == NULL) + return; + + list_del(&llc_engine->entry); + kfree(llc_engine->name); + kfree(llc_engine); +} + +struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev, + xmit_to_drv_t xmit_to_drv, + rcv_to_hci_t rcv_to_hci, int tx_headroom, + int tx_tailroom, llc_failure_t llc_failure) +{ + struct nfc_llc_engine *llc_engine; + struct nfc_llc *llc; + + llc_engine = nfc_llc_name_to_engine(name); + if (llc_engine == NULL) + return NULL; + + llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL); + if (llc == NULL) + return NULL; + + llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci, + tx_headroom, tx_tailroom, + &llc->rx_headroom, &llc->rx_tailroom, + llc_failure); + if (llc->data == NULL) { + kfree(llc); + return NULL; + } + llc->ops = llc_engine->ops; + + return llc; +} + +void nfc_llc_free(struct nfc_llc *llc) +{ + llc->ops->deinit(llc); + kfree(llc); +} + +inline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom, + int *rx_tailroom) +{ + *rx_headroom = llc->rx_headroom; + *rx_tailroom = llc->rx_tailroom; +} + +inline int nfc_llc_start(struct nfc_llc *llc) +{ + return llc->ops->start(llc); +} + +inline int nfc_llc_stop(struct nfc_llc *llc) +{ + return llc->ops->stop(llc); +} + +inline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) +{ + llc->ops->rcv_from_drv(llc, skb); +} + +inline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) +{ + return llc->ops->xmit_from_hci(llc, skb); +} + +inline void *nfc_llc_get_data(struct nfc_llc *llc) +{ + return llc->data; +} diff --git a/net/nfc/hci/llc.h b/net/nfc/hci/llc.h new file mode 100644 index 0000000..7be0b7f --- /dev/null +++ b/net/nfc/hci/llc.h @@ -0,0 +1,69 @@ +/* + * Link Layer Control manager + * + * Copyright (C) 2012 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions 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, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef __LOCAL_LLC_H_ +#define __LOCAL_LLC_H_ + +#include <net/nfc/hci.h> +#include <net/nfc/llc.h> +#include <linux/skbuff.h> + +struct nfc_llc_ops { + void *(*init) (struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, + rcv_to_hci_t rcv_to_hci, int tx_headroom, + int tx_tailroom, int *rx_headroom, int *rx_tailroom, + llc_failure_t llc_failure); + void (*deinit) (struct nfc_llc *llc); + int (*start) (struct nfc_llc *llc); + int (*stop) (struct nfc_llc *llc); + void (*rcv_from_drv) (struct nfc_llc *llc, struct sk_buff *skb); + int (*xmit_from_hci) (struct nfc_llc *llc, struct sk_buff *skb); +}; + +struct nfc_llc_engine { + const char *name; + struct nfc_llc_ops *ops; + struct list_head entry; +}; + +struct nfc_llc { + void *data; + struct nfc_llc_ops *ops; + int rx_headroom; + int rx_tailroom; +}; + +void *nfc_llc_get_data(struct nfc_llc *llc); + +int nfc_llc_register(const char *name, struct nfc_llc_ops *ops); +void nfc_llc_unregister(const char *name); + +int nfc_llc_nop_register(void); + +#if defined(CONFIG_NFC_SHDLC) +int nfc_llc_shdlc_register(void); +#else +static inline int nfc_llc_shdlc_register(void) +{ + return 0; +} +#endif + +#endif /* __LOCAL_LLC_H_ */ diff --git a/net/nfc/hci/llc_nop.c b/net/nfc/hci/llc_nop.c new file mode 100644 index 0000000..87b1029 --- /dev/null +++ b/net/nfc/hci/llc_nop.c @@ -0,0 +1,99 @@ +/* + * nop (passthrough) Link Layer Control + * + * Copyright (C) 2012 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions 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, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <linux/types.h> + +#include "llc.h" + +struct llc_nop { + struct nfc_hci_dev *hdev; + xmit_to_drv_t xmit_to_drv; + rcv_to_hci_t rcv_to_hci; + int tx_headroom; + int tx_tailroom; + llc_failure_t llc_failure; +}; + +static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, + rcv_to_hci_t rcv_to_hci, int tx_headroom, + int tx_tailroom, int *rx_headroom, int *rx_tailroom, + llc_failure_t llc_failure) +{ + struct llc_nop *llc_nop; + + *rx_headroom = 0; + *rx_tailroom = 0; + + llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL); + if (llc_nop == NULL) + return NULL; + + llc_nop->hdev = hdev; + llc_nop->xmit_to_drv = xmit_to_drv; + llc_nop->rcv_to_hci = rcv_to_hci; + llc_nop->tx_headroom = tx_headroom; + llc_nop->tx_tailroom = tx_tailroom; + llc_nop->llc_failure = llc_failure; + + return llc_nop; +} + +static void llc_nop_deinit(struct nfc_llc *llc) +{ + kfree(nfc_llc_get_data(llc)); +} + +static int llc_nop_start(struct nfc_llc *llc) +{ + return 0; +} + +static int llc_nop_stop(struct nfc_llc *llc) +{ + return 0; +} + +static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) +{ + struct llc_nop *llc_nop = nfc_llc_get_data(llc); + + llc_nop->rcv_to_hci(llc_nop->hdev, skb); +} + +static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) +{ + struct llc_nop *llc_nop = nfc_llc_get_data(llc); + + return llc_nop->xmit_to_drv(llc_nop->hdev, skb); +} + +static struct nfc_llc_ops llc_nop_ops = { + .init = llc_nop_init, + .deinit = llc_nop_deinit, + .start = llc_nop_start, + .stop = llc_nop_stop, + .rcv_from_drv = llc_nop_rcv_from_drv, + .xmit_from_hci = llc_nop_xmit_from_hci, +}; + +int nfc_llc_nop_register(void) +{ + return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops); +} diff --git a/net/nfc/hci/shdlc.c b/net/nfc/hci/llc_shdlc.c index 6f840c1..8f69d79 100644 --- a/net/nfc/hci/shdlc.c +++ b/net/nfc/hci/llc_shdlc.c @@ -1,10 +1,11 @@ /* + * shdlc Link Layer Control + * * Copyright (C) 2012 Intel Corporation. All rights reserved. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions 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 @@ -19,18 +20,65 @@ #define pr_fmt(fmt) "shdlc: %s: " fmt, __func__ +#include <linux/types.h> #include <linux/sched.h> -#include <linux/export.h> #include <linux/wait.h> -#include <linux/crc-ccitt.h> #include <linux/slab.h> #include <linux/skbuff.h> -#include <net/nfc/hci.h> -#include <net/nfc/shdlc.h> +#include "llc.h" + +enum shdlc_state { + SHDLC_DISCONNECTED = 0, + SHDLC_CONNECTING = 1, + SHDLC_NEGOTIATING = 2, + SHDLC_HALF_CONNECTED = 3, + SHDLC_CONNECTED = 4 +}; + +struct llc_shdlc { + struct nfc_hci_dev *hdev; + xmit_to_drv_t xmit_to_drv; + rcv_to_hci_t rcv_to_hci; + + struct mutex state_mutex; + enum shdlc_state state; + int hard_fault; + + wait_queue_head_t *connect_wq; + int connect_tries; + int connect_result; + struct timer_list connect_timer;/* aka T3 in spec 10.6.1 */ + + u8 w; /* window size */ + bool srej_support; + + struct timer_list t1_timer; /* send ack timeout */ + bool t1_active; + + struct timer_list t2_timer; /* guard/retransmit timeout */ + bool t2_active; + + int ns; /* next seq num for send */ + int nr; /* next expected seq num for receive */ + int dnr; /* oldest sent unacked seq num */ + + struct sk_buff_head rcv_q; + + struct sk_buff_head send_q; + bool rnr; /* other side is not ready to receive */ + + struct sk_buff_head ack_pending_q; + + struct work_struct sm_work; + + int tx_headroom; + int tx_tailroom; + + llc_failure_t llc_failure; +}; #define SHDLC_LLC_HEAD_ROOM 2 -#define SHDLC_LLC_TAIL_ROOM 2 #define SHDLC_MAX_WINDOW 4 #define SHDLC_SREJ_SUPPORT false @@ -71,7 +119,7 @@ do { \ } while (0) /* checks x < y <= z modulo 8 */ -static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z) +static bool llc_shdlc_x_lt_y_lteq_z(int x, int y, int z) { if (x < z) return ((x < y) && (y <= z)) ? true : false; @@ -80,7 +128,7 @@ static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z) } /* checks x <= y < z modulo 8 */ -static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z) +static bool llc_shdlc_x_lteq_y_lt_z(int x, int y, int z) { if (x <= z) return ((x <= y) && (y < z)) ? true : false; @@ -88,36 +136,21 @@ static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z) return ((y >= x) || (y < z)) ? true : false; } -static struct sk_buff *nfc_shdlc_alloc_skb(struct nfc_shdlc *shdlc, +static struct sk_buff *llc_shdlc_alloc_skb(struct llc_shdlc *shdlc, int payload_len) { struct sk_buff *skb; - skb = alloc_skb(shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM + - shdlc->client_tailroom + SHDLC_LLC_TAIL_ROOM + - payload_len, GFP_KERNEL); + skb = alloc_skb(shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM + + shdlc->tx_tailroom + payload_len, GFP_KERNEL); if (skb) - skb_reserve(skb, shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM); + skb_reserve(skb, shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM); return skb; } -static void nfc_shdlc_add_len_crc(struct sk_buff *skb) -{ - u16 crc; - int len; - - len = skb->len + 2; - *skb_push(skb, 1) = len; - - crc = crc_ccitt(0xffff, skb->data, skb->len); - crc = ~crc; - *skb_put(skb, 1) = crc & 0xff; - *skb_put(skb, 1) = crc >> 8; -} - /* immediately sends an S frame. */ -static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc, +static int llc_shdlc_send_s_frame(struct llc_shdlc *shdlc, enum sframe_type sframe_type, int nr) { int r; @@ -125,15 +158,13 @@ static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc, pr_debug("sframe_type=%d nr=%d\n", sframe_type, nr); - skb = nfc_shdlc_alloc_skb(shdlc, 0); + skb = llc_shdlc_alloc_skb(shdlc, 0); if (skb == NULL) return -ENOMEM; *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_S | (sframe_type << 3) | nr; - nfc_shdlc_add_len_crc(skb); - - r = shdlc->ops->xmit(shdlc, skb); + r = shdlc->xmit_to_drv(shdlc->hdev, skb); kfree_skb(skb); @@ -141,7 +172,7 @@ static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc, } /* immediately sends an U frame. skb may contain optional payload */ -static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc, +static int llc_shdlc_send_u_frame(struct llc_shdlc *shdlc, struct sk_buff *skb, enum uframe_modifier uframe_modifier) { @@ -151,9 +182,7 @@ static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc, *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_U | uframe_modifier; - nfc_shdlc_add_len_crc(skb); - - r = shdlc->ops->xmit(shdlc, skb); + r = shdlc->xmit_to_drv(shdlc->hdev, skb); kfree_skb(skb); @@ -164,7 +193,7 @@ static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc, * Free ack_pending frames until y_nr - 1, and reset t2 according to * the remaining oldest ack_pending frame sent time */ -static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr) +static void llc_shdlc_reset_t2(struct llc_shdlc *shdlc, int y_nr) { struct sk_buff *skb; int dnr = shdlc->dnr; /* MUST initially be < y_nr */ @@ -204,7 +233,7 @@ static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr) * Receive validated frames from lower layer. skb contains HCI payload only. * Handle according to algorithm at spec:10.8.2 */ -static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc, +static void llc_shdlc_rcv_i_frame(struct llc_shdlc *shdlc, struct sk_buff *skb, int ns, int nr) { int x_ns = ns; @@ -216,66 +245,64 @@ static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc, goto exit; if (x_ns != shdlc->nr) { - nfc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr); + llc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr); goto exit; } if (shdlc->t1_active == false) { shdlc->t1_active = true; - mod_timer(&shdlc->t1_timer, + mod_timer(&shdlc->t1_timer, jiffies + msecs_to_jiffies(SHDLC_T1_VALUE_MS(shdlc->w))); pr_debug("(re)Start T1(send ack)\n"); } if (skb->len) { - nfc_hci_recv_frame(shdlc->hdev, skb); + shdlc->rcv_to_hci(shdlc->hdev, skb); skb = NULL; } shdlc->nr = (shdlc->nr + 1) % 8; - if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) { - nfc_shdlc_reset_t2(shdlc, y_nr); + if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) { + llc_shdlc_reset_t2(shdlc, y_nr); shdlc->dnr = y_nr; } exit: - if (skb) - kfree_skb(skb); + kfree_skb(skb); } -static void nfc_shdlc_rcv_ack(struct nfc_shdlc *shdlc, int y_nr) +static void llc_shdlc_rcv_ack(struct llc_shdlc *shdlc, int y_nr) { pr_debug("remote acked up to frame %d excluded\n", y_nr); - if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) { - nfc_shdlc_reset_t2(shdlc, y_nr); + if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) { + llc_shdlc_reset_t2(shdlc, y_nr); shdlc->dnr = y_nr; } } -static void nfc_shdlc_requeue_ack_pending(struct nfc_shdlc *shdlc) +static void llc_shdlc_requeue_ack_pending(struct llc_shdlc *shdlc) { struct sk_buff *skb; pr_debug("ns reset to %d\n", shdlc->dnr); while ((skb = skb_dequeue_tail(&shdlc->ack_pending_q))) { - skb_pull(skb, 2); /* remove len+control */ - skb_trim(skb, skb->len - 2); /* remove crc */ + skb_pull(skb, 1); /* remove control field */ skb_queue_head(&shdlc->send_q, skb); } shdlc->ns = shdlc->dnr; } -static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr) +static void llc_shdlc_rcv_rej(struct llc_shdlc *shdlc, int y_nr) { struct sk_buff *skb; pr_debug("remote asks retransmition from frame %d\n", y_nr); - if (nfc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) { + if (llc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) { if (shdlc->t2_active) { del_timer_sync(&shdlc->t2_timer); shdlc->t2_active = false; @@ -289,12 +316,12 @@ static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr) } } - nfc_shdlc_requeue_ack_pending(shdlc); + llc_shdlc_requeue_ack_pending(shdlc); } } /* See spec RR:10.8.3 REJ:10.8.4 */ -static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc, +static void llc_shdlc_rcv_s_frame(struct llc_shdlc *shdlc, enum sframe_type s_frame_type, int nr) { struct sk_buff *skb; @@ -304,21 +331,21 @@ static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc, switch (s_frame_type) { case S_FRAME_RR: - nfc_shdlc_rcv_ack(shdlc, nr); + llc_shdlc_rcv_ack(shdlc, nr); if (shdlc->rnr == true) { /* see SHDLC 10.7.7 */ shdlc->rnr = false; if (shdlc->send_q.qlen == 0) { - skb = nfc_shdlc_alloc_skb(shdlc, 0); + skb = llc_shdlc_alloc_skb(shdlc, 0); if (skb) skb_queue_tail(&shdlc->send_q, skb); } } break; case S_FRAME_REJ: - nfc_shdlc_rcv_rej(shdlc, nr); + llc_shdlc_rcv_rej(shdlc, nr); break; case S_FRAME_RNR: - nfc_shdlc_rcv_ack(shdlc, nr); + llc_shdlc_rcv_ack(shdlc, nr); shdlc->rnr = true; break; default: @@ -326,7 +353,7 @@ static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc, } } -static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r) +static void llc_shdlc_connect_complete(struct llc_shdlc *shdlc, int r) { pr_debug("result=%d\n", r); @@ -337,7 +364,7 @@ static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r) shdlc->nr = 0; shdlc->dnr = 0; - shdlc->state = SHDLC_CONNECTED; + shdlc->state = SHDLC_HALF_CONNECTED; } else { shdlc->state = SHDLC_DISCONNECTED; } @@ -347,36 +374,36 @@ static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r) wake_up(shdlc->connect_wq); } -static int nfc_shdlc_connect_initiate(struct nfc_shdlc *shdlc) +static int llc_shdlc_connect_initiate(struct llc_shdlc *shdlc) { struct sk_buff *skb; pr_debug("\n"); - skb = nfc_shdlc_alloc_skb(shdlc, 2); + skb = llc_shdlc_alloc_skb(shdlc, 2); if (skb == NULL) return -ENOMEM; *skb_put(skb, 1) = SHDLC_MAX_WINDOW; *skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0; - return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET); + return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET); } -static int nfc_shdlc_connect_send_ua(struct nfc_shdlc *shdlc) +static int llc_shdlc_connect_send_ua(struct llc_shdlc *shdlc) { struct sk_buff *skb; pr_debug("\n"); - skb = nfc_shdlc_alloc_skb(shdlc, 0); + skb = llc_shdlc_alloc_skb(shdlc, 0); if (skb == NULL) return -ENOMEM; - return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA); + return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA); } -static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc, +static void llc_shdlc_rcv_u_frame(struct llc_shdlc *shdlc, struct sk_buff *skb, enum uframe_modifier u_frame_modifier) { @@ -388,8 +415,13 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc, switch (u_frame_modifier) { case U_FRAME_RSET: - if (shdlc->state == SHDLC_NEGOCIATING) { - /* we sent RSET, but chip wants to negociate */ + switch (shdlc->state) { + case SHDLC_NEGOTIATING: + case SHDLC_CONNECTING: + /* + * We sent RSET, but chip wants to negociate or we + * got RSET before we managed to send out our. + */ if (skb->len > 0) w = skb->data[0]; @@ -401,22 +433,34 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc, (SHDLC_SREJ_SUPPORT || (srej_support == false))) { shdlc->w = w; shdlc->srej_support = srej_support; - r = nfc_shdlc_connect_send_ua(shdlc); - nfc_shdlc_connect_complete(shdlc, r); + r = llc_shdlc_connect_send_ua(shdlc); + llc_shdlc_connect_complete(shdlc, r); } - } else if (shdlc->state == SHDLC_CONNECTED) { + break; + case SHDLC_HALF_CONNECTED: + /* + * Chip resent RSET due to its timeout - Ignote it + * as we already sent UA. + */ + break; + case SHDLC_CONNECTED: /* * Chip wants to reset link. This is unexpected and * unsupported. */ shdlc->hard_fault = -ECONNRESET; + break; + default: + break; } break; case U_FRAME_UA: if ((shdlc->state == SHDLC_CONNECTING && shdlc->connect_tries > 0) || - (shdlc->state == SHDLC_NEGOCIATING)) - nfc_shdlc_connect_complete(shdlc, 0); + (shdlc->state == SHDLC_NEGOTIATING)) { + llc_shdlc_connect_complete(shdlc, 0); + shdlc->state = SHDLC_CONNECTED; + } break; default: break; @@ -425,7 +469,7 @@ static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc, kfree_skb(skb); } -static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc) +static void llc_shdlc_handle_rcv_queue(struct llc_shdlc *shdlc) { struct sk_buff *skb; u8 control; @@ -443,19 +487,25 @@ static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc) switch (control & SHDLC_CONTROL_HEAD_MASK) { case SHDLC_CONTROL_HEAD_I: case SHDLC_CONTROL_HEAD_I2: + if (shdlc->state == SHDLC_HALF_CONNECTED) + shdlc->state = SHDLC_CONNECTED; + ns = (control & SHDLC_CONTROL_NS_MASK) >> 3; nr = control & SHDLC_CONTROL_NR_MASK; - nfc_shdlc_rcv_i_frame(shdlc, skb, ns, nr); + llc_shdlc_rcv_i_frame(shdlc, skb, ns, nr); break; case SHDLC_CONTROL_HEAD_S: + if (shdlc->state == SHDLC_HALF_CONNECTED) + shdlc->state = SHDLC_CONNECTED; + s_frame_type = (control & SHDLC_CONTROL_TYPE_MASK) >> 3; nr = control & SHDLC_CONTROL_NR_MASK; - nfc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr); + llc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr); kfree_skb(skb); break; case SHDLC_CONTROL_HEAD_U: u_frame_modifier = control & SHDLC_CONTROL_M_MASK; - nfc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier); + llc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier); break; default: pr_err("UNKNOWN Control=%d\n", control); @@ -465,7 +515,7 @@ static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc) } } -static int nfc_shdlc_w_used(int ns, int dnr) +static int llc_shdlc_w_used(int ns, int dnr) { int unack_count; @@ -478,7 +528,7 @@ static int nfc_shdlc_w_used(int ns, int dnr) } /* Send frames according to algorithm at spec:10.8.1 */ -static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc) +static void llc_shdlc_handle_send_queue(struct llc_shdlc *shdlc) { struct sk_buff *skb; int r; @@ -489,7 +539,7 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc) ("sendQlen=%d ns=%d dnr=%d rnr=%s w_room=%d unackQlen=%d\n", shdlc->send_q.qlen, shdlc->ns, shdlc->dnr, shdlc->rnr == false ? "false" : "true", - shdlc->w - nfc_shdlc_w_used(shdlc->ns, shdlc->dnr), + shdlc->w - llc_shdlc_w_used(shdlc->ns, shdlc->dnr), shdlc->ack_pending_q.qlen); while (shdlc->send_q.qlen && shdlc->ack_pending_q.qlen < shdlc->w && @@ -508,11 +558,9 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc) pr_debug("Sending I-Frame %d, waiting to rcv %d\n", shdlc->ns, shdlc->nr); - /* SHDLC_DUMP_SKB("shdlc frame written", skb); */ - - nfc_shdlc_add_len_crc(skb); + SHDLC_DUMP_SKB("shdlc frame written", skb); - r = shdlc->ops->xmit(shdlc, skb); + r = shdlc->xmit_to_drv(shdlc->hdev, skb); if (r < 0) { shdlc->hard_fault = r; break; @@ -534,36 +582,36 @@ static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc) } } -static void nfc_shdlc_connect_timeout(unsigned long data) +static void llc_shdlc_connect_timeout(unsigned long data) { - struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data; + struct llc_shdlc *shdlc = (struct llc_shdlc *)data; pr_debug("\n"); - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); } -static void nfc_shdlc_t1_timeout(unsigned long data) +static void llc_shdlc_t1_timeout(unsigned long data) { - struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data; + struct llc_shdlc *shdlc = (struct llc_shdlc *)data; pr_debug("SoftIRQ: need to send ack\n"); - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); } -static void nfc_shdlc_t2_timeout(unsigned long data) +static void llc_shdlc_t2_timeout(unsigned long data) { - struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data; + struct llc_shdlc *shdlc = (struct llc_shdlc *)data; pr_debug("SoftIRQ: need to retransmit\n"); - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); } -static void nfc_shdlc_sm_work(struct work_struct *work) +static void llc_shdlc_sm_work(struct work_struct *work) { - struct nfc_shdlc *shdlc = container_of(work, struct nfc_shdlc, sm_work); + struct llc_shdlc *shdlc = container_of(work, struct llc_shdlc, sm_work); int r; pr_debug("\n"); @@ -578,46 +626,47 @@ static void nfc_shdlc_sm_work(struct work_struct *work) break; case SHDLC_CONNECTING: if (shdlc->hard_fault) { - nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault); + llc_shdlc_connect_complete(shdlc, shdlc->hard_fault); break; } if (shdlc->connect_tries++ < 5) - r = nfc_shdlc_connect_initiate(shdlc); + r = llc_shdlc_connect_initiate(shdlc); else r = -ETIME; if (r < 0) - nfc_shdlc_connect_complete(shdlc, r); + llc_shdlc_connect_complete(shdlc, r); else { mod_timer(&shdlc->connect_timer, jiffies + msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS)); - shdlc->state = SHDLC_NEGOCIATING; + shdlc->state = SHDLC_NEGOTIATING; } break; - case SHDLC_NEGOCIATING: + case SHDLC_NEGOTIATING: if (timer_pending(&shdlc->connect_timer) == 0) { shdlc->state = SHDLC_CONNECTING; - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); } - nfc_shdlc_handle_rcv_queue(shdlc); + llc_shdlc_handle_rcv_queue(shdlc); if (shdlc->hard_fault) { - nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault); + llc_shdlc_connect_complete(shdlc, shdlc->hard_fault); break; } break; + case SHDLC_HALF_CONNECTED: case SHDLC_CONNECTED: - nfc_shdlc_handle_rcv_queue(shdlc); - nfc_shdlc_handle_send_queue(shdlc); + llc_shdlc_handle_rcv_queue(shdlc); + llc_shdlc_handle_send_queue(shdlc); if (shdlc->t1_active && timer_pending(&shdlc->t1_timer) == 0) { pr_debug ("Handle T1(send ack) elapsed (T1 now inactive)\n"); shdlc->t1_active = false; - r = nfc_shdlc_send_s_frame(shdlc, S_FRAME_RR, + r = llc_shdlc_send_s_frame(shdlc, S_FRAME_RR, shdlc->nr); if (r < 0) shdlc->hard_fault = r; @@ -629,12 +678,12 @@ static void nfc_shdlc_sm_work(struct work_struct *work) shdlc->t2_active = false; - nfc_shdlc_requeue_ack_pending(shdlc); - nfc_shdlc_handle_send_queue(shdlc); + llc_shdlc_requeue_ack_pending(shdlc); + llc_shdlc_handle_send_queue(shdlc); } if (shdlc->hard_fault) { - nfc_hci_driver_failure(shdlc->hdev, shdlc->hard_fault); + shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault); } break; default: @@ -647,7 +696,7 @@ static void nfc_shdlc_sm_work(struct work_struct *work) * Called from syscall context to establish shdlc link. Sleeps until * link is ready or failure. */ -static int nfc_shdlc_connect(struct nfc_shdlc *shdlc) +static int llc_shdlc_connect(struct llc_shdlc *shdlc) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(connect_wq); @@ -662,14 +711,14 @@ static int nfc_shdlc_connect(struct nfc_shdlc *shdlc) mutex_unlock(&shdlc->state_mutex); - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); wait_event(connect_wq, shdlc->connect_result != 1); return shdlc->connect_result; } -static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc) +static void llc_shdlc_disconnect(struct llc_shdlc *shdlc) { pr_debug("\n"); @@ -679,7 +728,7 @@ static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc) mutex_unlock(&shdlc->state_mutex); - queue_work(shdlc->sm_wq, &shdlc->sm_work); + queue_work(system_nrt_wq, &shdlc->sm_work); } /* @@ -687,7 +736,7 @@ static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc) * skb contains only LLC header and payload. * If skb == NULL, it is a notification that the link below is dead. */ -void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb) +static void llc_shdlc_recv_frame(struct llc_shdlc *shdlc, struct sk_buff *skb) { if (skb == NULL) { pr_err("NULL Frame -> link is dead\n"); @@ -697,176 +746,37 @@ void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb) skb_queue_tail(&shdlc->rcv_q, skb); } - queue_work(shdlc->sm_wq, &shdlc->sm_work); -} -EXPORT_SYMBOL(nfc_shdlc_recv_frame); - -static int nfc_shdlc_open(struct nfc_hci_dev *hdev) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - int r; - - pr_debug("\n"); - - if (shdlc->ops->open) { - r = shdlc->ops->open(shdlc); - if (r < 0) - return r; - } - - r = nfc_shdlc_connect(shdlc); - if (r < 0 && shdlc->ops->close) - shdlc->ops->close(shdlc); - - return r; -} - -static void nfc_shdlc_close(struct nfc_hci_dev *hdev) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - pr_debug("\n"); - - nfc_shdlc_disconnect(shdlc); - - if (shdlc->ops->close) - shdlc->ops->close(shdlc); + queue_work(system_nrt_wq, &shdlc->sm_work); } -static int nfc_shdlc_hci_ready(struct nfc_hci_dev *hdev) +static void *llc_shdlc_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, + rcv_to_hci_t rcv_to_hci, int tx_headroom, + int tx_tailroom, int *rx_headroom, int *rx_tailroom, + llc_failure_t llc_failure) { - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - int r = 0; - - pr_debug("\n"); + struct llc_shdlc *shdlc; - if (shdlc->ops->hci_ready) - r = shdlc->ops->hci_ready(shdlc); - - return r; -} - -static int nfc_shdlc_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - SHDLC_DUMP_SKB("queuing HCP packet to shdlc", skb); - - skb_queue_tail(&shdlc->send_q, skb); + *rx_headroom = SHDLC_LLC_HEAD_ROOM; + *rx_tailroom = 0; - queue_work(shdlc->sm_wq, &shdlc->sm_work); - - return 0; -} - -static int nfc_shdlc_start_poll(struct nfc_hci_dev *hdev, - u32 im_protocols, u32 tm_protocols) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - pr_debug("\n"); - - if (shdlc->ops->start_poll) - return shdlc->ops->start_poll(shdlc, - im_protocols, tm_protocols); - - return 0; -} - -static int nfc_shdlc_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, - struct nfc_target *target) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - if (shdlc->ops->target_from_gate) - return shdlc->ops->target_from_gate(shdlc, gate, target); - - return -EPERM; -} - -static int nfc_shdlc_complete_target_discovered(struct nfc_hci_dev *hdev, - u8 gate, - struct nfc_target *target) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - pr_debug("\n"); - - if (shdlc->ops->complete_target_discovered) - return shdlc->ops->complete_target_discovered(shdlc, gate, - target); - - return 0; -} - -static int nfc_shdlc_data_exchange(struct nfc_hci_dev *hdev, - struct nfc_target *target, - struct sk_buff *skb, - struct sk_buff **res_skb) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - if (shdlc->ops->data_exchange) - return shdlc->ops->data_exchange(shdlc, target, skb, res_skb); - - return -EPERM; -} - -static int nfc_shdlc_check_presence(struct nfc_hci_dev *hdev, - struct nfc_target *target) -{ - struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev); - - if (shdlc->ops->check_presence) - return shdlc->ops->check_presence(shdlc, target); - - return 0; -} - -static struct nfc_hci_ops shdlc_ops = { - .open = nfc_shdlc_open, - .close = nfc_shdlc_close, - .hci_ready = nfc_shdlc_hci_ready, - .xmit = nfc_shdlc_xmit, - .start_poll = nfc_shdlc_start_poll, - .target_from_gate = nfc_shdlc_target_from_gate, - .complete_target_discovered = nfc_shdlc_complete_target_discovered, - .data_exchange = nfc_shdlc_data_exchange, - .check_presence = nfc_shdlc_check_presence, -}; - -struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops, - struct nfc_hci_init_data *init_data, - u32 protocols, - int tx_headroom, int tx_tailroom, - int max_link_payload, const char *devname) -{ - struct nfc_shdlc *shdlc; - int r; - char name[32]; - - if (ops->xmit == NULL) - return NULL; - - shdlc = kzalloc(sizeof(struct nfc_shdlc), GFP_KERNEL); + shdlc = kzalloc(sizeof(struct llc_shdlc), GFP_KERNEL); if (shdlc == NULL) return NULL; mutex_init(&shdlc->state_mutex); - shdlc->ops = ops; shdlc->state = SHDLC_DISCONNECTED; init_timer(&shdlc->connect_timer); shdlc->connect_timer.data = (unsigned long)shdlc; - shdlc->connect_timer.function = nfc_shdlc_connect_timeout; + shdlc->connect_timer.function = llc_shdlc_connect_timeout; init_timer(&shdlc->t1_timer); shdlc->t1_timer.data = (unsigned long)shdlc; - shdlc->t1_timer.function = nfc_shdlc_t1_timeout; + shdlc->t1_timer.function = llc_shdlc_t1_timeout; init_timer(&shdlc->t2_timer); shdlc->t2_timer.data = (unsigned long)shdlc; - shdlc->t2_timer.function = nfc_shdlc_t2_timeout; + shdlc->t2_timer.function = llc_shdlc_t2_timeout; shdlc->w = SHDLC_MAX_WINDOW; shdlc->srej_support = SHDLC_SREJ_SUPPORT; @@ -875,77 +785,73 @@ struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops, skb_queue_head_init(&shdlc->send_q); skb_queue_head_init(&shdlc->ack_pending_q); - INIT_WORK(&shdlc->sm_work, nfc_shdlc_sm_work); - snprintf(name, sizeof(name), "%s_shdlc_sm_wq", devname); - shdlc->sm_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND | - WQ_MEM_RECLAIM, 1); - if (shdlc->sm_wq == NULL) - goto err_allocwq; + INIT_WORK(&shdlc->sm_work, llc_shdlc_sm_work); - shdlc->client_headroom = tx_headroom; - shdlc->client_tailroom = tx_tailroom; - - shdlc->hdev = nfc_hci_allocate_device(&shdlc_ops, init_data, protocols, - tx_headroom + SHDLC_LLC_HEAD_ROOM, - tx_tailroom + SHDLC_LLC_TAIL_ROOM, - max_link_payload); - if (shdlc->hdev == NULL) - goto err_allocdev; - - nfc_hci_set_clientdata(shdlc->hdev, shdlc); - - r = nfc_hci_register_device(shdlc->hdev); - if (r < 0) - goto err_regdev; + shdlc->hdev = hdev; + shdlc->xmit_to_drv = xmit_to_drv; + shdlc->rcv_to_hci = rcv_to_hci; + shdlc->tx_headroom = tx_headroom; + shdlc->tx_tailroom = tx_tailroom; + shdlc->llc_failure = llc_failure; return shdlc; +} -err_regdev: - nfc_hci_free_device(shdlc->hdev); +static void llc_shdlc_deinit(struct nfc_llc *llc) +{ + struct llc_shdlc *shdlc = nfc_llc_get_data(llc); -err_allocdev: - destroy_workqueue(shdlc->sm_wq); + skb_queue_purge(&shdlc->rcv_q); + skb_queue_purge(&shdlc->send_q); + skb_queue_purge(&shdlc->ack_pending_q); -err_allocwq: kfree(shdlc); - - return NULL; } -EXPORT_SYMBOL(nfc_shdlc_allocate); -void nfc_shdlc_free(struct nfc_shdlc *shdlc) +static int llc_shdlc_start(struct nfc_llc *llc) { - pr_debug("\n"); + struct llc_shdlc *shdlc = nfc_llc_get_data(llc); - nfc_hci_unregister_device(shdlc->hdev); - nfc_hci_free_device(shdlc->hdev); + return llc_shdlc_connect(shdlc); +} - destroy_workqueue(shdlc->sm_wq); +static int llc_shdlc_stop(struct nfc_llc *llc) +{ + struct llc_shdlc *shdlc = nfc_llc_get_data(llc); - skb_queue_purge(&shdlc->rcv_q); - skb_queue_purge(&shdlc->send_q); - skb_queue_purge(&shdlc->ack_pending_q); + llc_shdlc_disconnect(shdlc); - kfree(shdlc); + return 0; } -EXPORT_SYMBOL(nfc_shdlc_free); -void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata) +static void llc_shdlc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) { - pr_debug("\n"); + struct llc_shdlc *shdlc = nfc_llc_get_data(llc); - shdlc->clientdata = clientdata; + llc_shdlc_recv_frame(shdlc, skb); } -EXPORT_SYMBOL(nfc_shdlc_set_clientdata); -void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc) +static int llc_shdlc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) { - return shdlc->clientdata; + struct llc_shdlc *shdlc = nfc_llc_get_data(llc); + + skb_queue_tail(&shdlc->send_q, skb); + + queue_work(system_nrt_wq, &shdlc->sm_work); + + return 0; } -EXPORT_SYMBOL(nfc_shdlc_get_clientdata); -struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc) +static struct nfc_llc_ops llc_shdlc_ops = { + .init = llc_shdlc_init, + .deinit = llc_shdlc_deinit, + .start = llc_shdlc_start, + .stop = llc_shdlc_stop, + .rcv_from_drv = llc_shdlc_rcv_from_drv, + .xmit_from_hci = llc_shdlc_xmit_from_hci, +}; + +int nfc_llc_shdlc_register(void) { - return shdlc->hdev; + return nfc_llc_register(LLC_SHDLC_NAME, &llc_shdlc_ops); } -EXPORT_SYMBOL(nfc_shdlc_get_hci_dev); |
