diff options
Diffstat (limited to 'net/nfc/nci')
| -rw-r--r-- | net/nfc/nci/Kconfig | 11 | ||||
| -rw-r--r-- | net/nfc/nci/Makefile | 7 | ||||
| -rw-r--r-- | net/nfc/nci/core.c | 973 | ||||
| -rw-r--r-- | net/nfc/nci/data.c | 254 | ||||
| -rw-r--r-- | net/nfc/nci/lib.c | 86 | ||||
| -rw-r--r-- | net/nfc/nci/ntf.c | 611 | ||||
| -rw-r--r-- | net/nfc/nci/rsp.c | 238 |
7 files changed, 2180 insertions, 0 deletions
diff --git a/net/nfc/nci/Kconfig b/net/nfc/nci/Kconfig new file mode 100644 index 0000000..67f7b64 --- /dev/null +++ b/net/nfc/nci/Kconfig @@ -0,0 +1,11 @@ +config NFC_NCI + depends on NFC + tristate "NCI protocol support" + depends on m + default n + help + NCI (NFC Controller Interface) is a communication protocol between + an NFC Controller (NFCC) and a Device Host (DH). + + Say Y here to compile NCI support into the kernel or say M to + compile it as module (nci). diff --git a/net/nfc/nci/Makefile b/net/nfc/nci/Makefile new file mode 100644 index 0000000..261b52e --- /dev/null +++ b/net/nfc/nci/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the Linux NFC NCI layer. +# + +obj-$(CPTCFG_NFC_NCI) += nci.o + +nci-objs := core.o data.o lib.o ntf.o rsp.o
\ No newline at end of file diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c new file mode 100644 index 0000000..48ada0e --- /dev/null +++ b/net/nfc/nci/core.c @@ -0,0 +1,973 @@ +/* + * The NFC Controller Interface is the communication protocol between an + * NFC Controller (NFCC) and a Device Host (DH). + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Written by Ilan Elias <ilane@ti.com> + * + * Acknowledgements: + * This file is based on hci_core.c, which was written + * by Maxim Krasnyansky. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/workqueue.h> +#include <linux/completion.h> +#include <linux/export.h> +#include <linux/sched.h> +#include <linux/bitops.h> +#include <linux/skbuff.h> + +#include "../nfc.h" +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> +#include <linux/nfc.h> + +static void nci_cmd_work(struct work_struct *work); +static void nci_rx_work(struct work_struct *work); +static void nci_tx_work(struct work_struct *work); + +/* ---- NCI requests ---- */ + +void nci_req_complete(struct nci_dev *ndev, int result) +{ + if (ndev->req_status == NCI_REQ_PEND) { + ndev->req_result = result; + ndev->req_status = NCI_REQ_DONE; + complete(&ndev->req_completion); + } +} + +static void nci_req_cancel(struct nci_dev *ndev, int err) +{ + if (ndev->req_status == NCI_REQ_PEND) { + ndev->req_result = err; + ndev->req_status = NCI_REQ_CANCELED; + complete(&ndev->req_completion); + } +} + +/* Execute request and wait for completion. */ +static int __nci_request(struct nci_dev *ndev, + void (*req)(struct nci_dev *ndev, unsigned long opt), + unsigned long opt, __u32 timeout) +{ + int rc = 0; + long completion_rc; + + ndev->req_status = NCI_REQ_PEND; + + init_completion(&ndev->req_completion); + req(ndev, opt); + completion_rc = + wait_for_completion_interruptible_timeout(&ndev->req_completion, + timeout); + + pr_debug("wait_for_completion return %ld\n", completion_rc); + + if (completion_rc > 0) { + switch (ndev->req_status) { + case NCI_REQ_DONE: + rc = nci_to_errno(ndev->req_result); + break; + + case NCI_REQ_CANCELED: + rc = -ndev->req_result; + break; + + default: + rc = -ETIMEDOUT; + break; + } + } else { + pr_err("wait_for_completion_interruptible_timeout failed %ld\n", + completion_rc); + + rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc)); + } + + ndev->req_status = ndev->req_result = 0; + + return rc; +} + +static inline int nci_request(struct nci_dev *ndev, + void (*req)(struct nci_dev *ndev, + unsigned long opt), + unsigned long opt, __u32 timeout) +{ + int rc; + + if (!test_bit(NCI_UP, &ndev->flags)) + return -ENETDOWN; + + /* Serialize all requests */ + mutex_lock(&ndev->req_lock); + rc = __nci_request(ndev, req, opt, timeout); + mutex_unlock(&ndev->req_lock); + + return rc; +} + +static void nci_reset_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_core_reset_cmd cmd; + + cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG; + nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd); +} + +static void nci_init_req(struct nci_dev *ndev, unsigned long opt) +{ + nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL); +} + +static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_rf_disc_map_cmd cmd; + struct disc_map_config *cfg = cmd.mapping_configs; + __u8 *num = &cmd.num_mapping_configs; + int i; + + /* set rf mapping configurations */ + *num = 0; + + /* by default mapping is set to NCI_RF_INTERFACE_FRAME */ + for (i = 0; i < ndev->num_supported_rf_interfaces; i++) { + if (ndev->supported_rf_interfaces[i] == + NCI_RF_INTERFACE_ISO_DEP) { + cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; + cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | + NCI_DISC_MAP_MODE_LISTEN; + cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP; + (*num)++; + } else if (ndev->supported_rf_interfaces[i] == + NCI_RF_INTERFACE_NFC_DEP) { + cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; + cfg[*num].mode = NCI_DISC_MAP_MODE_POLL | + NCI_DISC_MAP_MODE_LISTEN; + cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP; + (*num)++; + } + + if (*num == NCI_MAX_NUM_MAPPING_CONFIGS) + break; + } + + nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD, + (1 + ((*num) * sizeof(struct disc_map_config))), &cmd); +} + +struct nci_set_config_param { + __u8 id; + size_t len; + __u8 *val; +}; + +static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_set_config_param *param = (struct nci_set_config_param *)opt; + struct nci_core_set_config_cmd cmd; + + BUG_ON(param->len > NCI_MAX_PARAM_LEN); + + cmd.num_params = 1; + cmd.param.id = param->id; + cmd.param.len = param->len; + memcpy(cmd.param.val, param->val, param->len); + + nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd); +} + +static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_rf_disc_cmd cmd; + __u32 protocols = opt; + + cmd.num_disc_configs = 0; + + if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && + (protocols & NFC_PROTO_JEWEL_MASK || + protocols & NFC_PROTO_MIFARE_MASK || + protocols & NFC_PROTO_ISO14443_MASK || + protocols & NFC_PROTO_NFC_DEP_MASK)) { + cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = + NCI_NFC_A_PASSIVE_POLL_MODE; + cmd.disc_configs[cmd.num_disc_configs].frequency = 1; + cmd.num_disc_configs++; + } + + if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && + (protocols & NFC_PROTO_ISO14443_B_MASK)) { + cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = + NCI_NFC_B_PASSIVE_POLL_MODE; + cmd.disc_configs[cmd.num_disc_configs].frequency = 1; + cmd.num_disc_configs++; + } + + if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) && + (protocols & NFC_PROTO_FELICA_MASK || + protocols & NFC_PROTO_NFC_DEP_MASK)) { + cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode = + NCI_NFC_F_PASSIVE_POLL_MODE; + cmd.disc_configs[cmd.num_disc_configs].frequency = 1; + cmd.num_disc_configs++; + } + + nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD, + (1 + (cmd.num_disc_configs * sizeof(struct disc_config))), + &cmd); +} + +struct nci_rf_discover_select_param { + __u8 rf_discovery_id; + __u8 rf_protocol; +}; + +static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_rf_discover_select_param *param = + (struct nci_rf_discover_select_param *)opt; + struct nci_rf_discover_select_cmd cmd; + + cmd.rf_discovery_id = param->rf_discovery_id; + cmd.rf_protocol = param->rf_protocol; + + switch (cmd.rf_protocol) { + case NCI_RF_PROTOCOL_ISO_DEP: + cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP; + break; + + case NCI_RF_PROTOCOL_NFC_DEP: + cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP; + break; + + default: + cmd.rf_interface = NCI_RF_INTERFACE_FRAME; + break; + } + + nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD, + sizeof(struct nci_rf_discover_select_cmd), &cmd); +} + +static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt) +{ + struct nci_rf_deactivate_cmd cmd; + + cmd.type = NCI_DEACTIVATE_TYPE_IDLE_MODE; + + nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD, + sizeof(struct nci_rf_deactivate_cmd), &cmd); +} + +static int nci_open_device(struct nci_dev *ndev) +{ + int rc = 0; + + mutex_lock(&ndev->req_lock); + + if (test_bit(NCI_UP, &ndev->flags)) { + rc = -EALREADY; + goto done; + } + + if (ndev->ops->open(ndev)) { + rc = -EIO; + goto done; + } + + atomic_set(&ndev->cmd_cnt, 1); + + set_bit(NCI_INIT, &ndev->flags); + + rc = __nci_request(ndev, nci_reset_req, 0, + msecs_to_jiffies(NCI_RESET_TIMEOUT)); + + if (!rc) { + rc = __nci_request(ndev, nci_init_req, 0, + msecs_to_jiffies(NCI_INIT_TIMEOUT)); + } + + if (!rc) { + rc = __nci_request(ndev, nci_init_complete_req, 0, + msecs_to_jiffies(NCI_INIT_TIMEOUT)); + } + + clear_bit(NCI_INIT, &ndev->flags); + + if (!rc) { + set_bit(NCI_UP, &ndev->flags); + nci_clear_target_list(ndev); + atomic_set(&ndev->state, NCI_IDLE); + } else { + /* Init failed, cleanup */ + skb_queue_purge(&ndev->cmd_q); + skb_queue_purge(&ndev->rx_q); + skb_queue_purge(&ndev->tx_q); + + ndev->ops->close(ndev); + ndev->flags = 0; + } + +done: + mutex_unlock(&ndev->req_lock); + return rc; +} + +static int nci_close_device(struct nci_dev *ndev) +{ + nci_req_cancel(ndev, ENODEV); + mutex_lock(&ndev->req_lock); + + if (!test_and_clear_bit(NCI_UP, &ndev->flags)) { + del_timer_sync(&ndev->cmd_timer); + del_timer_sync(&ndev->data_timer); + mutex_unlock(&ndev->req_lock); + return 0; + } + + /* Drop RX and TX queues */ + skb_queue_purge(&ndev->rx_q); + skb_queue_purge(&ndev->tx_q); + + /* Flush RX and TX wq */ + flush_workqueue(ndev->rx_wq); + flush_workqueue(ndev->tx_wq); + + /* Reset device */ + skb_queue_purge(&ndev->cmd_q); + atomic_set(&ndev->cmd_cnt, 1); + + set_bit(NCI_INIT, &ndev->flags); + __nci_request(ndev, nci_reset_req, 0, + msecs_to_jiffies(NCI_RESET_TIMEOUT)); + clear_bit(NCI_INIT, &ndev->flags); + + /* 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; + + mutex_unlock(&ndev->req_lock); + + return 0; +} + +/* NCI command timer function */ +static void nci_cmd_timer(unsigned long arg) +{ + struct nci_dev *ndev = (void *) arg; + + atomic_set(&ndev->cmd_cnt, 1); + queue_work(ndev->cmd_wq, &ndev->cmd_work); +} + +/* NCI data exchange timer function */ +static void nci_data_timer(unsigned long arg) +{ + struct nci_dev *ndev = (void *) arg; + + set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); + queue_work(ndev->rx_wq, &ndev->rx_work); +} + +static int nci_dev_up(struct nfc_dev *nfc_dev) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + + return nci_open_device(ndev); +} + +static int nci_dev_down(struct nfc_dev *nfc_dev) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + + return nci_close_device(ndev); +} + +static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + struct nci_set_config_param param; + __u8 local_gb[NFC_MAX_GT_LEN]; + int i; + + param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len); + if ((param.val == NULL) || (param.len == 0)) + return 0; + + if (param.len > NFC_MAX_GT_LEN) + return -EINVAL; + + for (i = 0; i < param.len; i++) + local_gb[param.len-1-i] = param.val[i]; + + param.id = NCI_PN_ATR_REQ_GEN_BYTES; + param.val = local_gb; + + return nci_request(ndev, nci_set_config_req, (unsigned long)¶m, + msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT)); +} + +static int nci_start_poll(struct nfc_dev *nfc_dev, + __u32 im_protocols, __u32 tm_protocols) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + int rc; + + if ((atomic_read(&ndev->state) == NCI_DISCOVERY) || + (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) { + pr_err("unable to start poll, since poll is already active\n"); + return -EBUSY; + } + + if (ndev->target_active_prot) { + pr_err("there is an active target\n"); + return -EBUSY; + } + + if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) || + (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) { + pr_debug("target active or w4 select, implicitly deactivate\n"); + + rc = nci_request(ndev, nci_rf_deactivate_req, 0, + msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); + if (rc) + return -EBUSY; + } + + if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { + rc = nci_set_local_general_bytes(nfc_dev); + if (rc) { + pr_err("failed to set local general bytes\n"); + return rc; + } + } + + rc = nci_request(ndev, nci_rf_discover_req, im_protocols, + msecs_to_jiffies(NCI_RF_DISC_TIMEOUT)); + + if (!rc) + ndev->poll_prots = im_protocols; + + return rc; +} + +static void nci_stop_poll(struct nfc_dev *nfc_dev) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + + if ((atomic_read(&ndev->state) != NCI_DISCOVERY) && + (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) { + pr_err("unable to stop poll, since poll is not active\n"); + return; + } + + nci_request(ndev, nci_rf_deactivate_req, 0, + msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); +} + +static int nci_activate_target(struct nfc_dev *nfc_dev, + struct nfc_target *target, __u32 protocol) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + struct nci_rf_discover_select_param param; + struct nfc_target *nci_target = NULL; + int i; + int rc = 0; + + pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol); + + if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) && + (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { + pr_err("there is no available target to activate\n"); + return -EINVAL; + } + + if (ndev->target_active_prot) { + pr_err("there is already an active target\n"); + return -EBUSY; + } + + for (i = 0; i < ndev->n_targets; i++) { + if (ndev->targets[i].idx == target->idx) { + nci_target = &ndev->targets[i]; + break; + } + } + + if (!nci_target) { + pr_err("unable to find the selected target\n"); + return -EINVAL; + } + + if (!(nci_target->supported_protocols & (1 << protocol))) { + pr_err("target does not support the requested protocol 0x%x\n", + protocol); + return -EINVAL; + } + + if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { + param.rf_discovery_id = nci_target->logical_idx; + + if (protocol == NFC_PROTO_JEWEL) + param.rf_protocol = NCI_RF_PROTOCOL_T1T; + else if (protocol == NFC_PROTO_MIFARE) + param.rf_protocol = NCI_RF_PROTOCOL_T2T; + else if (protocol == NFC_PROTO_FELICA) + param.rf_protocol = NCI_RF_PROTOCOL_T3T; + else if (protocol == NFC_PROTO_ISO14443 || + protocol == NFC_PROTO_ISO14443_B) + param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP; + else + param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP; + + rc = nci_request(ndev, nci_rf_discover_select_req, + (unsigned long)¶m, + msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT)); + } + + if (!rc) + ndev->target_active_prot = protocol; + + return rc; +} + +static void nci_deactivate_target(struct nfc_dev *nfc_dev, + struct nfc_target *target) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + + pr_debug("entry\n"); + + if (!ndev->target_active_prot) { + pr_err("unable to deactivate target, no active target\n"); + return; + } + + ndev->target_active_prot = 0; + + if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) { + nci_request(ndev, nci_rf_deactivate_req, 0, + msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT)); + } +} + +static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, + __u8 comm_mode, __u8 *gb, size_t gb_len) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + int rc; + + pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode); + + rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP); + if (rc) + return rc; + + rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb, + ndev->remote_gb_len); + if (!rc) + rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE, + NFC_RF_INITIATOR); + + return rc; +} + +static int nci_dep_link_down(struct nfc_dev *nfc_dev) +{ + pr_debug("entry\n"); + + nci_deactivate_target(nfc_dev, NULL); + + return 0; +} + + +static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target, + struct sk_buff *skb, + data_exchange_cb_t cb, void *cb_context) +{ + struct nci_dev *ndev = nfc_get_drvdata(nfc_dev); + int rc; + + pr_debug("target_idx %d, len %d\n", target->idx, skb->len); + + if (!ndev->target_active_prot) { + pr_err("unable to exchange data, no active target\n"); + return -EINVAL; + } + + if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags)) + return -EBUSY; + + /* store cb and context to be used on receiving data */ + ndev->data_exchange_cb = cb; + ndev->data_exchange_cb_context = cb_context; + + rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb); + if (rc) + clear_bit(NCI_DATA_EXCHANGE, &ndev->flags); + + return rc; +} + +static struct nfc_ops nci_nfc_ops = { + .dev_up = nci_dev_up, + .dev_down = nci_dev_down, + .start_poll = nci_start_poll, + .stop_poll = nci_stop_poll, + .dep_link_up = nci_dep_link_up, + .dep_link_down = nci_dep_link_down, + .activate_target = nci_activate_target, + .deactivate_target = nci_deactivate_target, + .im_transceive = nci_transceive, +}; + +/* ---- Interface to NCI drivers ---- */ + +/** + * nci_allocate_device - allocate a new nci device + * + * @ops: device operations + * @supported_protocols: NFC protocols supported by the device + */ +struct nci_dev *nci_allocate_device(struct nci_ops *ops, + __u32 supported_protocols, + __u32 supported_se, + int tx_headroom, int tx_tailroom) +{ + struct nci_dev *ndev; + + pr_debug("supported_protocols 0x%x\n", supported_protocols); + + if (!ops->open || !ops->close || !ops->send) + return NULL; + + if (!supported_protocols) + return NULL; + + ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL); + if (!ndev) + return NULL; + + ndev->ops = ops; + ndev->tx_headroom = tx_headroom; + ndev->tx_tailroom = tx_tailroom; + + ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops, + supported_protocols, + supported_se, + tx_headroom + NCI_DATA_HDR_SIZE, + tx_tailroom); + if (!ndev->nfc_dev) + goto free_exit; + + nfc_set_drvdata(ndev->nfc_dev, ndev); + + return ndev; + +free_exit: + kfree(ndev); + return NULL; +} +EXPORT_SYMBOL(nci_allocate_device); + +/** + * nci_free_device - deallocate nci device + * + * @ndev: The nci device to deallocate + */ +void nci_free_device(struct nci_dev *ndev) +{ + nfc_free_device(ndev->nfc_dev); + kfree(ndev); +} +EXPORT_SYMBOL(nci_free_device); + +/** + * nci_register_device - register a nci device in the nfc subsystem + * + * @dev: The nci device to register + */ +int nci_register_device(struct nci_dev *ndev) +{ + int rc; + struct device *dev = &ndev->nfc_dev->dev; + char name[32]; + + rc = nfc_register_device(ndev->nfc_dev); + if (rc) + goto exit; + + ndev->flags = 0; + + INIT_WORK(&ndev->cmd_work, nci_cmd_work); + snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev)); + ndev->cmd_wq = create_singlethread_workqueue(name); + if (!ndev->cmd_wq) { + rc = -ENOMEM; + goto unreg_exit; + } + + INIT_WORK(&ndev->rx_work, nci_rx_work); + snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev)); + ndev->rx_wq = create_singlethread_workqueue(name); + if (!ndev->rx_wq) { + rc = -ENOMEM; + goto destroy_cmd_wq_exit; + } + + INIT_WORK(&ndev->tx_work, nci_tx_work); + snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev)); + ndev->tx_wq = create_singlethread_workqueue(name); + if (!ndev->tx_wq) { + rc = -ENOMEM; + goto destroy_rx_wq_exit; + } + + skb_queue_head_init(&ndev->cmd_q); + skb_queue_head_init(&ndev->rx_q); + skb_queue_head_init(&ndev->tx_q); + + setup_timer(&ndev->cmd_timer, nci_cmd_timer, + (unsigned long) ndev); + setup_timer(&ndev->data_timer, nci_data_timer, + (unsigned long) ndev); + + mutex_init(&ndev->req_lock); + + goto exit; + +destroy_rx_wq_exit: + destroy_workqueue(ndev->rx_wq); + +destroy_cmd_wq_exit: + destroy_workqueue(ndev->cmd_wq); + +unreg_exit: + nfc_unregister_device(ndev->nfc_dev); + +exit: + return rc; +} +EXPORT_SYMBOL(nci_register_device); + +/** + * nci_unregister_device - unregister a nci device in the nfc subsystem + * + * @dev: The nci device to unregister + */ +void nci_unregister_device(struct nci_dev *ndev) +{ + nci_close_device(ndev); + + destroy_workqueue(ndev->cmd_wq); + destroy_workqueue(ndev->rx_wq); + destroy_workqueue(ndev->tx_wq); + + nfc_unregister_device(ndev->nfc_dev); +} +EXPORT_SYMBOL(nci_unregister_device); + +/** + * nci_recv_frame - receive frame from NCI drivers + * + * @skb: The sk_buff to receive + */ +int nci_recv_frame(struct sk_buff *skb) +{ + struct nci_dev *ndev = (struct nci_dev *) skb->dev; + + pr_debug("len %d\n", skb->len); + + if (!ndev || (!test_bit(NCI_UP, &ndev->flags) && + !test_bit(NCI_INIT, &ndev->flags))) { + kfree_skb(skb); + return -ENXIO; + } + + /* Queue frame for rx worker thread */ + skb_queue_tail(&ndev->rx_q, skb); + queue_work(ndev->rx_wq, &ndev->rx_work); + + return 0; +} +EXPORT_SYMBOL(nci_recv_frame); + +static int nci_send_frame(struct sk_buff *skb) +{ + struct nci_dev *ndev = (struct nci_dev *) skb->dev; + + pr_debug("len %d\n", skb->len); + + if (!ndev) { + kfree_skb(skb); + return -ENODEV; + } + + /* Get rid of skb owner, prior to sending to the driver. */ + skb_orphan(skb); + + return ndev->ops->send(skb); +} + +/* Send NCI command */ +int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload) +{ + struct nci_ctrl_hdr *hdr; + struct sk_buff *skb; + + pr_debug("opcode 0x%x, plen %d\n", opcode, plen); + + skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL); + if (!skb) { + pr_err("no memory for command\n"); + return -ENOMEM; + } + + hdr = (struct nci_ctrl_hdr *) skb_put(skb, NCI_CTRL_HDR_SIZE); + hdr->gid = nci_opcode_gid(opcode); + hdr->oid = nci_opcode_oid(opcode); + hdr->plen = plen; + + nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT); + nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST); + + if (plen) + memcpy(skb_put(skb, plen), payload, plen); + + skb->dev = (void *) ndev; + + skb_queue_tail(&ndev->cmd_q, skb); + queue_work(ndev->cmd_wq, &ndev->cmd_work); + + return 0; +} + +/* ---- NCI TX Data worker thread ---- */ + +static void nci_tx_work(struct work_struct *work) +{ + struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work); + struct sk_buff *skb; + + pr_debug("credits_cnt %d\n", atomic_read(&ndev->credits_cnt)); + + /* Send queued tx data */ + while (atomic_read(&ndev->credits_cnt)) { + skb = skb_dequeue(&ndev->tx_q); + if (!skb) + return; + + /* Check if data flow control is used */ + if (atomic_read(&ndev->credits_cnt) != + NCI_DATA_FLOW_CONTROL_NOT_USED) + atomic_dec(&ndev->credits_cnt); + + pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n", + nci_pbf(skb->data), + nci_conn_id(skb->data), + nci_plen(skb->data)); + + nci_send_frame(skb); + + mod_timer(&ndev->data_timer, + jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT)); + } +} + +/* ----- NCI RX worker thread (data & control) ----- */ + +static void nci_rx_work(struct work_struct *work) +{ + struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work); + struct sk_buff *skb; + + while ((skb = skb_dequeue(&ndev->rx_q))) { + /* Process frame */ + switch (nci_mt(skb->data)) { + case NCI_MT_RSP_PKT: + nci_rsp_packet(ndev, skb); + break; + + case NCI_MT_NTF_PKT: + nci_ntf_packet(ndev, skb); + break; + + case NCI_MT_DATA_PKT: + nci_rx_data_packet(ndev, skb); + break; + + default: + pr_err("unknown MT 0x%x\n", nci_mt(skb->data)); + kfree_skb(skb); + break; + } + } + + /* check if a data exchange timout has occurred */ + if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) { + /* complete the data exchange transaction, if exists */ + if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) + nci_data_exchange_complete(ndev, NULL, -ETIMEDOUT); + + clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); + } +} + +/* ----- NCI TX CMD worker thread ----- */ + +static void nci_cmd_work(struct work_struct *work) +{ + struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work); + struct sk_buff *skb; + + pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt)); + + /* Send queued command */ + if (atomic_read(&ndev->cmd_cnt)) { + skb = skb_dequeue(&ndev->cmd_q); + if (!skb) + return; + + atomic_dec(&ndev->cmd_cnt); + + pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", + nci_pbf(skb->data), + nci_opcode_gid(nci_opcode(skb->data)), + nci_opcode_oid(nci_opcode(skb->data)), + nci_plen(skb->data)); + + nci_send_frame(skb); + + mod_timer(&ndev->cmd_timer, + jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT)); + } +} + +MODULE_LICENSE("GPL"); diff --git a/net/nfc/nci/data.c b/net/nfc/nci/data.c new file mode 100644 index 0000000..76c48c5 --- /dev/null +++ b/net/nfc/nci/data.c @@ -0,0 +1,254 @@ +/* + * The NFC Controller Interface is the communication protocol between an + * NFC Controller (NFCC) and a Device Host (DH). + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Written by Ilan Elias <ilane@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/wait.h> +#include <linux/bitops.h> +#include <linux/skbuff.h> + +#include "../nfc.h" +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> +#include <linux/nfc.h> + +/* Complete data exchange transaction and forward skb to nfc core */ +void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb, + int err) +{ + data_exchange_cb_t cb = ndev->data_exchange_cb; + void *cb_context = ndev->data_exchange_cb_context; + + pr_debug("len %d, err %d\n", skb ? skb->len : 0, err); + + /* data exchange is complete, stop the data timer */ + del_timer_sync(&ndev->data_timer); + clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags); + + if (cb) { + ndev->data_exchange_cb = NULL; + ndev->data_exchange_cb_context = NULL; + + /* forward skb to nfc core */ + cb(cb_context, skb, err); + } else if (skb) { + pr_err("no rx callback, dropping rx data...\n"); + + /* no waiting callback, free skb */ + kfree_skb(skb); + } + + clear_bit(NCI_DATA_EXCHANGE, &ndev->flags); +} + +/* ----------------- NCI TX Data ----------------- */ + +static inline void nci_push_data_hdr(struct nci_dev *ndev, + __u8 conn_id, + struct sk_buff *skb, + __u8 pbf) +{ + struct nci_data_hdr *hdr; + int plen = skb->len; + + hdr = (struct nci_data_hdr *) skb_push(skb, NCI_DATA_HDR_SIZE); + hdr->conn_id = conn_id; + hdr->rfu = 0; + hdr->plen = plen; + + nci_mt_set((__u8 *)hdr, NCI_MT_DATA_PKT); + nci_pbf_set((__u8 *)hdr, pbf); + + skb->dev = (void *) ndev; +} + +static int nci_queue_tx_data_frags(struct nci_dev *ndev, + __u8 conn_id, + struct sk_buff *skb) { + int total_len = skb->len; + unsigned char *data = skb->data; + unsigned long flags; + struct sk_buff_head frags_q; + struct sk_buff *skb_frag; + int frag_len; + int rc = 0; + + pr_debug("conn_id 0x%x, total_len %d\n", conn_id, total_len); + + __skb_queue_head_init(&frags_q); + + while (total_len) { + frag_len = + min_t(int, total_len, ndev->max_data_pkt_payload_size); + + skb_frag = nci_skb_alloc(ndev, + (NCI_DATA_HDR_SIZE + frag_len), + GFP_KERNEL); + if (skb_frag == NULL) { + rc = -ENOMEM; + goto free_exit; + } + skb_reserve(skb_frag, NCI_DATA_HDR_SIZE); + + /* first, copy the data */ + memcpy(skb_put(skb_frag, frag_len), data, frag_len); + + /* second, set the header */ + nci_push_data_hdr(ndev, conn_id, skb_frag, + ((total_len == frag_len) ? + (NCI_PBF_LAST) : (NCI_PBF_CONT))); + + __skb_queue_tail(&frags_q, skb_frag); + + data += frag_len; + total_len -= frag_len; + + pr_debug("frag_len %d, remaining total_len %d\n", + frag_len, total_len); + } + + /* queue all fragments atomically */ + spin_lock_irqsave(&ndev->tx_q.lock, flags); + + while ((skb_frag = __skb_dequeue(&frags_q)) != NULL) + __skb_queue_tail(&ndev->tx_q, skb_frag); + + spin_unlock_irqrestore(&ndev->tx_q.lock, flags); + + /* free the original skb */ + kfree_skb(skb); + + goto exit; + +free_exit: + while ((skb_frag = __skb_dequeue(&frags_q)) != NULL) + kfree_skb(skb_frag); + +exit: + return rc; +} + +/* Send NCI data */ +int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb) +{ + int rc = 0; + + pr_debug("conn_id 0x%x, plen %d\n", conn_id, skb->len); + + /* check if the packet need to be fragmented */ + if (skb->len <= ndev->max_data_pkt_payload_size) { + /* no need to fragment packet */ + nci_push_data_hdr(ndev, conn_id, skb, NCI_PBF_LAST); + + skb_queue_tail(&ndev->tx_q, skb); + } else { + /* fragment packet and queue the fragments */ + rc = nci_queue_tx_data_frags(ndev, conn_id, skb); + if (rc) { + pr_err("failed to fragment tx data packet\n"); + goto free_exit; + } + } + + queue_work(ndev->tx_wq, &ndev->tx_work); + + goto exit; + +free_exit: + kfree_skb(skb); + +exit: + return rc; +} + +/* ----------------- NCI RX Data ----------------- */ + +static void nci_add_rx_data_frag(struct nci_dev *ndev, + struct sk_buff *skb, + __u8 pbf) +{ + int reassembly_len; + int err = 0; + + if (ndev->rx_data_reassembly) { + reassembly_len = ndev->rx_data_reassembly->len; + + /* first, make enough room for the already accumulated data */ + if (skb_cow_head(skb, reassembly_len)) { + pr_err("error adding room for accumulated rx data\n"); + + kfree_skb(skb); + skb = NULL; + + kfree_skb(ndev->rx_data_reassembly); + ndev->rx_data_reassembly = NULL; + + err = -ENOMEM; + goto exit; + } + + /* second, combine the two fragments */ + memcpy(skb_push(skb, reassembly_len), + ndev->rx_data_reassembly->data, + reassembly_len); + + /* third, free old reassembly */ + kfree_skb(ndev->rx_data_reassembly); + ndev->rx_data_reassembly = NULL; + } + + if (pbf == NCI_PBF_CONT) { + /* need to wait for next fragment, store skb and exit */ + ndev->rx_data_reassembly = skb; + return; + } + +exit: + nci_data_exchange_complete(ndev, skb, err); +} + +/* Rx Data packet */ +void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u8 pbf = nci_pbf(skb->data); + + pr_debug("len %d\n", skb->len); + + pr_debug("NCI RX: MT=data, PBF=%d, conn_id=%d, plen=%d\n", + nci_pbf(skb->data), + nci_conn_id(skb->data), + nci_plen(skb->data)); + + /* strip the nci data header */ + skb_pull(skb, NCI_DATA_HDR_SIZE); + + if (ndev->target_active_prot == NFC_PROTO_MIFARE) { + /* frame I/F => remove the status byte */ + pr_debug("NFC_PROTO_MIFARE => remove the status byte\n"); + skb_trim(skb, (skb->len - 1)); + } + + nci_add_rx_data_frag(ndev, skb, pbf); +} diff --git a/net/nfc/nci/lib.c b/net/nfc/nci/lib.c new file mode 100644 index 0000000..6b7fd26 --- /dev/null +++ b/net/nfc/nci/lib.c @@ -0,0 +1,86 @@ +/* + * The NFC Controller Interface is the communication protocol between an + * NFC Controller (NFCC) and a Device Host (DH). + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Written by Ilan Elias <ilane@ti.com> + * + * Acknowledgements: + * This file is based on lib.c, which was written + * by Maxim Krasnyansky. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/errno.h> + +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> + +/* NCI status codes to Unix errno mapping */ +int nci_to_errno(__u8 code) +{ + switch (code) { + case NCI_STATUS_OK: + return 0; + + case NCI_STATUS_REJECTED: + return -EBUSY; + + case NCI_STATUS_RF_FRAME_CORRUPTED: + return -EBADMSG; + + case NCI_STATUS_NOT_INITIALIZED: + return -EHOSTDOWN; + + case NCI_STATUS_SYNTAX_ERROR: + case NCI_STATUS_SEMANTIC_ERROR: + case NCI_STATUS_INVALID_PARAM: + case NCI_STATUS_RF_PROTOCOL_ERROR: + case NCI_STATUS_NFCEE_PROTOCOL_ERROR: + return -EPROTO; + + case NCI_STATUS_UNKNOWN_GID: + case NCI_STATUS_UNKNOWN_OID: + return -EBADRQC; + + case NCI_STATUS_MESSAGE_SIZE_EXCEEDED: + return -EMSGSIZE; + + case NCI_STATUS_DISCOVERY_ALREADY_STARTED: + return -EALREADY; + + case NCI_STATUS_DISCOVERY_TARGET_ACTIVATION_FAILED: + case NCI_STATUS_NFCEE_INTERFACE_ACTIVATION_FAILED: + return -ECONNREFUSED; + + case NCI_STATUS_RF_TRANSMISSION_ERROR: + case NCI_STATUS_NFCEE_TRANSMISSION_ERROR: + return -ECOMM; + + case NCI_STATUS_RF_TIMEOUT_ERROR: + case NCI_STATUS_NFCEE_TIMEOUT_ERROR: + return -ETIMEDOUT; + + case NCI_STATUS_FAILED: + default: + return -ENOSYS; + } +} +EXPORT_SYMBOL(nci_to_errno); diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c new file mode 100644 index 0000000..b2aa98e --- /dev/null +++ b/net/nfc/nci/ntf.c @@ -0,0 +1,611 @@ +/* + * The NFC Controller Interface is the communication protocol between an + * NFC Controller (NFCC) and a Device Host (DH). + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Written by Ilan Elias <ilane@ti.com> + * + * Acknowledgements: + * This file is based on hci_event.c, which was written + * by Maxim Krasnyansky. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> +#include <linux/skbuff.h> + +#include "../nfc.h" +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> +#include <linux/nfc.h> + +/* Handle NCI Notification packets */ + +static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_core_conn_credit_ntf *ntf = (void *) skb->data; + int i; + + pr_debug("num_entries %d\n", ntf->num_entries); + + if (ntf->num_entries > NCI_MAX_NUM_CONN) + ntf->num_entries = NCI_MAX_NUM_CONN; + + /* update the credits */ + for (i = 0; i < ntf->num_entries; i++) { + ntf->conn_entries[i].conn_id = + nci_conn_id(&ntf->conn_entries[i].conn_id); + + pr_debug("entry[%d]: conn_id %d, credits %d\n", + i, ntf->conn_entries[i].conn_id, + ntf->conn_entries[i].credits); + + if (ntf->conn_entries[i].conn_id == NCI_STATIC_RF_CONN_ID) { + /* found static rf connection */ + atomic_add(ntf->conn_entries[i].credits, + &ndev->credits_cnt); + } + } + + /* trigger the next tx */ + if (!skb_queue_empty(&ndev->tx_q)) + queue_work(ndev->tx_wq, &ndev->tx_work); +} + +static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + pr_debug("status 0x%x\n", status); + + if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { + /* Activation failed, so complete the request + (the state remains the same) */ + nci_req_complete(ndev, status); + } +} + +static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_core_intf_error_ntf *ntf = (void *) skb->data; + + ntf->conn_id = nci_conn_id(&ntf->conn_id); + + pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id); + + /* complete the data exchange transaction, if exists */ + if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) + nci_data_exchange_complete(ndev, NULL, -EIO); +} + +static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev, + struct rf_tech_specific_params_nfca_poll *nfca_poll, + __u8 *data) +{ + nfca_poll->sens_res = __le16_to_cpu(*((__u16 *)data)); + data += 2; + + nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE); + + pr_debug("sens_res 0x%x, nfcid1_len %d\n", + nfca_poll->sens_res, nfca_poll->nfcid1_len); + + memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len); + data += nfca_poll->nfcid1_len; + + nfca_poll->sel_res_len = *data++; + + if (nfca_poll->sel_res_len != 0) + nfca_poll->sel_res = *data++; + + pr_debug("sel_res_len %d, sel_res 0x%x\n", + nfca_poll->sel_res_len, + nfca_poll->sel_res); + + return data; +} + +static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev, + struct rf_tech_specific_params_nfcb_poll *nfcb_poll, + __u8 *data) +{ + nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE); + + pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len); + + memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len); + data += nfcb_poll->sensb_res_len; + + return data; +} + +static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev, + struct rf_tech_specific_params_nfcf_poll *nfcf_poll, + __u8 *data) +{ + nfcf_poll->bit_rate = *data++; + nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE); + + pr_debug("bit_rate %d, sensf_res_len %d\n", + nfcf_poll->bit_rate, nfcf_poll->sensf_res_len); + + memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len); + data += nfcf_poll->sensf_res_len; + + return data; +} + +static int nci_add_new_protocol(struct nci_dev *ndev, + struct nfc_target *target, + __u8 rf_protocol, + __u8 rf_tech_and_mode, + void *params) +{ + struct rf_tech_specific_params_nfca_poll *nfca_poll; + struct rf_tech_specific_params_nfcb_poll *nfcb_poll; + struct rf_tech_specific_params_nfcf_poll *nfcf_poll; + __u32 protocol; + + if (rf_protocol == NCI_RF_PROTOCOL_T2T) + protocol = NFC_PROTO_MIFARE_MASK; + else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP) + if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) + protocol = NFC_PROTO_ISO14443_MASK; + else + protocol = NFC_PROTO_ISO14443_B_MASK; + else if (rf_protocol == NCI_RF_PROTOCOL_T3T) + protocol = NFC_PROTO_FELICA_MASK; + else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) + protocol = NFC_PROTO_NFC_DEP_MASK; + else + protocol = 0; + + if (!(protocol & ndev->poll_prots)) { + pr_err("the target found does not have the desired protocol\n"); + return -EPROTO; + } + + if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) { + nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params; + + target->sens_res = nfca_poll->sens_res; + target->sel_res = nfca_poll->sel_res; + target->nfcid1_len = nfca_poll->nfcid1_len; + if (target->nfcid1_len > 0) { + memcpy(target->nfcid1, nfca_poll->nfcid1, + target->nfcid1_len); + } + } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { + nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; + + target->sensb_res_len = nfcb_poll->sensb_res_len; + if (target->sensb_res_len > 0) { + memcpy(target->sensb_res, nfcb_poll->sensb_res, + target->sensb_res_len); + } + } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { + nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; + + target->sensf_res_len = nfcf_poll->sensf_res_len; + if (target->sensf_res_len > 0) { + memcpy(target->sensf_res, nfcf_poll->sensf_res, + target->sensf_res_len); + } + } else { + pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); + return -EPROTO; + } + + target->supported_protocols |= protocol; + + pr_debug("protocol 0x%x\n", protocol); + + return 0; +} + +static void nci_add_new_target(struct nci_dev *ndev, + struct nci_rf_discover_ntf *ntf) +{ + struct nfc_target *target; + int i, rc; + + for (i = 0; i < ndev->n_targets; i++) { + target = &ndev->targets[i]; + if (target->logical_idx == ntf->rf_discovery_id) { + /* This target already exists, add the new protocol */ + nci_add_new_protocol(ndev, target, ntf->rf_protocol, + ntf->rf_tech_and_mode, + &ntf->rf_tech_specific_params); + return; + } + } + + /* This is a new target, check if we've enough room */ + if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { + pr_debug("not enough room, ignoring new target...\n"); + return; + } + + target = &ndev->targets[ndev->n_targets]; + + rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, + ntf->rf_tech_and_mode, + &ntf->rf_tech_specific_params); + if (!rc) { + target->logical_idx = ntf->rf_discovery_id; + ndev->n_targets++; + + pr_debug("logical idx %d, n_targets %d\n", target->logical_idx, + ndev->n_targets); + } +} + +void nci_clear_target_list(struct nci_dev *ndev) +{ + memset(ndev->targets, 0, + (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); + + ndev->n_targets = 0; +} + +static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_rf_discover_ntf ntf; + __u8 *data = skb->data; + bool add_target = true; + + ntf.rf_discovery_id = *data++; + ntf.rf_protocol = *data++; + ntf.rf_tech_and_mode = *data++; + ntf.rf_tech_specific_params_len = *data++; + + pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); + pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); + pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); + pr_debug("rf_tech_specific_params_len %d\n", + ntf.rf_tech_specific_params_len); + + if (ntf.rf_tech_specific_params_len > 0) { + switch (ntf.rf_tech_and_mode) { + case NCI_NFC_A_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfca_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfca_poll), data); + break; + + case NCI_NFC_B_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfcb_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfcb_poll), data); + break; + + case NCI_NFC_F_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfcf_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfcf_poll), data); + break; + + default: + pr_err("unsupported rf_tech_and_mode 0x%x\n", + ntf.rf_tech_and_mode); + data += ntf.rf_tech_specific_params_len; + add_target = false; + } + } + + ntf.ntf_type = *data++; + pr_debug("ntf_type %d\n", ntf.ntf_type); + + if (add_target == true) + nci_add_new_target(ndev, &ntf); + + if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { + atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); + } else { + atomic_set(&ndev->state, NCI_W4_HOST_SELECT); + nfc_targets_found(ndev->nfc_dev, ndev->targets, + ndev->n_targets); + } +} + +static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, + struct nci_rf_intf_activated_ntf *ntf, __u8 *data) +{ + struct activation_params_nfca_poll_iso_dep *nfca_poll; + struct activation_params_nfcb_poll_iso_dep *nfcb_poll; + + switch (ntf->activation_rf_tech_and_mode) { + case NCI_NFC_A_PASSIVE_POLL_MODE: + nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; + nfca_poll->rats_res_len = min_t(__u8, *data++, 20); + pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); + if (nfca_poll->rats_res_len > 0) { + memcpy(nfca_poll->rats_res, + data, nfca_poll->rats_res_len); + } + break; + + case NCI_NFC_B_PASSIVE_POLL_MODE: + nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; + nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50); + pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len); + if (nfcb_poll->attrib_res_len > 0) { + memcpy(nfcb_poll->attrib_res, + data, nfcb_poll->attrib_res_len); + } + break; + + default: + pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", + ntf->activation_rf_tech_and_mode); + return NCI_STATUS_RF_PROTOCOL_ERROR; + } + + return NCI_STATUS_OK; +} + +static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev, + struct nci_rf_intf_activated_ntf *ntf, __u8 *data) +{ + struct activation_params_poll_nfc_dep *poll; + int i; + + switch (ntf->activation_rf_tech_and_mode) { + case NCI_NFC_A_PASSIVE_POLL_MODE: + case NCI_NFC_F_PASSIVE_POLL_MODE: + poll = &ntf->activation_params.poll_nfc_dep; + poll->atr_res_len = min_t(__u8, *data++, 63); + pr_debug("atr_res_len %d\n", poll->atr_res_len); + if (poll->atr_res_len > 0) { + for (i = 0; i < poll->atr_res_len; i++) + poll->atr_res[poll->atr_res_len-1-i] = data[i]; + } + break; + + default: + pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", + ntf->activation_rf_tech_and_mode); + return NCI_STATUS_RF_PROTOCOL_ERROR; + } + + return NCI_STATUS_OK; +} + +static void nci_target_auto_activated(struct nci_dev *ndev, + struct nci_rf_intf_activated_ntf *ntf) +{ + struct nfc_target *target; + int rc; + + target = &ndev->targets[ndev->n_targets]; + + rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, + ntf->activation_rf_tech_and_mode, + &ntf->rf_tech_specific_params); + if (rc) + return; + + target->logical_idx = ntf->rf_discovery_id; + ndev->n_targets++; + + pr_debug("logical idx %d, n_targets %d\n", + target->logical_idx, ndev->n_targets); + + nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); +} + +static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_rf_intf_activated_ntf ntf; + __u8 *data = skb->data; + int err = NCI_STATUS_OK; + + ntf.rf_discovery_id = *data++; + ntf.rf_interface = *data++; + ntf.rf_protocol = *data++; + ntf.activation_rf_tech_and_mode = *data++; + ntf.max_data_pkt_payload_size = *data++; + ntf.initial_num_credits = *data++; + ntf.rf_tech_specific_params_len = *data++; + + pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); + pr_debug("rf_interface 0x%x\n", ntf.rf_interface); + pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); + pr_debug("activation_rf_tech_and_mode 0x%x\n", + ntf.activation_rf_tech_and_mode); + pr_debug("max_data_pkt_payload_size 0x%x\n", + ntf.max_data_pkt_payload_size); + pr_debug("initial_num_credits 0x%x\n", + ntf.initial_num_credits); + pr_debug("rf_tech_specific_params_len %d\n", + ntf.rf_tech_specific_params_len); + + if (ntf.rf_tech_specific_params_len > 0) { + switch (ntf.activation_rf_tech_and_mode) { + case NCI_NFC_A_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfca_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfca_poll), data); + break; + + case NCI_NFC_B_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfcb_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfcb_poll), data); + break; + + case NCI_NFC_F_PASSIVE_POLL_MODE: + data = nci_extract_rf_params_nfcf_passive_poll(ndev, + &(ntf.rf_tech_specific_params.nfcf_poll), data); + break; + + default: + pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", + ntf.activation_rf_tech_and_mode); + err = NCI_STATUS_RF_PROTOCOL_ERROR; + goto exit; + } + } + + ntf.data_exch_rf_tech_and_mode = *data++; + ntf.data_exch_tx_bit_rate = *data++; + ntf.data_exch_rx_bit_rate = *data++; + ntf.activation_params_len = *data++; + + pr_debug("data_exch_rf_tech_and_mode 0x%x\n", + ntf.data_exch_rf_tech_and_mode); + pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate); + pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate); + pr_debug("activation_params_len %d\n", ntf.activation_params_len); + + if (ntf.activation_params_len > 0) { + switch (ntf.rf_interface) { + case NCI_RF_INTERFACE_ISO_DEP: + err = nci_extract_activation_params_iso_dep(ndev, + &ntf, data); + break; + + case NCI_RF_INTERFACE_NFC_DEP: + err = nci_extract_activation_params_nfc_dep(ndev, + &ntf, data); + break; + + case NCI_RF_INTERFACE_FRAME: + /* no activation params */ + break; + + default: + pr_err("unsupported rf_interface 0x%x\n", + ntf.rf_interface); + err = NCI_STATUS_RF_PROTOCOL_ERROR; + break; + } + } + +exit: + if (err == NCI_STATUS_OK) { + ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size; + ndev->initial_num_credits = ntf.initial_num_credits; + + /* set the available credits to initial value */ + atomic_set(&ndev->credits_cnt, ndev->initial_num_credits); + + /* store general bytes to be reported later in dep_link_up */ + if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) { + ndev->remote_gb_len = 0; + + if (ntf.activation_params_len > 0) { + /* ATR_RES general bytes at offset 15 */ + ndev->remote_gb_len = min_t(__u8, + (ntf.activation_params + .poll_nfc_dep.atr_res_len + - NFC_ATR_RES_GT_OFFSET), + NFC_MAX_GT_LEN); + memcpy(ndev->remote_gb, + (ntf.activation_params.poll_nfc_dep + .atr_res + NFC_ATR_RES_GT_OFFSET), + ndev->remote_gb_len); + } + } + } + + if (atomic_read(&ndev->state) == NCI_DISCOVERY) { + /* A single target was found and activated automatically */ + atomic_set(&ndev->state, NCI_POLL_ACTIVE); + if (err == NCI_STATUS_OK) + nci_target_auto_activated(ndev, &ntf); + } else { /* ndev->state == NCI_W4_HOST_SELECT */ + /* A selected target was activated, so complete the request */ + atomic_set(&ndev->state, NCI_POLL_ACTIVE); + nci_req_complete(ndev, err); + } +} + +static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_rf_deactivate_ntf *ntf = (void *) skb->data; + + pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); + + /* drop tx data queue */ + skb_queue_purge(&ndev->tx_q); + + /* drop partial rx data packet */ + if (ndev->rx_data_reassembly) { + kfree_skb(ndev->rx_data_reassembly); + ndev->rx_data_reassembly = NULL; + } + + /* complete the data exchange transaction, if exists */ + if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) + nci_data_exchange_complete(ndev, NULL, -EIO); + + nci_clear_target_list(ndev); + atomic_set(&ndev->state, NCI_IDLE); + nci_req_complete(ndev, NCI_STATUS_OK); +} + +void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u16 ntf_opcode = nci_opcode(skb->data); + + pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", + nci_pbf(skb->data), + nci_opcode_gid(ntf_opcode), + nci_opcode_oid(ntf_opcode), + nci_plen(skb->data)); + + /* strip the nci control header */ + skb_pull(skb, NCI_CTRL_HDR_SIZE); + + switch (ntf_opcode) { + case NCI_OP_CORE_CONN_CREDITS_NTF: + nci_core_conn_credits_ntf_packet(ndev, skb); + break; + + case NCI_OP_CORE_GENERIC_ERROR_NTF: + nci_core_generic_error_ntf_packet(ndev, skb); + break; + + case NCI_OP_CORE_INTF_ERROR_NTF: + nci_core_conn_intf_error_ntf_packet(ndev, skb); + break; + + case NCI_OP_RF_DISCOVER_NTF: + nci_rf_discover_ntf_packet(ndev, skb); + break; + + case NCI_OP_RF_INTF_ACTIVATED_NTF: + nci_rf_intf_activated_ntf_packet(ndev, skb); + break; + + case NCI_OP_RF_DEACTIVATE_NTF: + nci_rf_deactivate_ntf_packet(ndev, skb); + break; + + default: + pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); + break; + } + + kfree_skb(skb); +} diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c new file mode 100644 index 0000000..dd072f3 --- /dev/null +++ b/net/nfc/nci/rsp.c @@ -0,0 +1,238 @@ +/* + * The NFC Controller Interface is the communication protocol between an + * NFC Controller (NFCC) and a Device Host (DH). + * + * Copyright (C) 2011 Texas Instruments, Inc. + * + * Written by Ilan Elias <ilane@ti.com> + * + * Acknowledgements: + * This file is based on hci_event.c, which was written + * by Maxim Krasnyansky. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> +#include <linux/skbuff.h> + +#include "../nfc.h" +#include <net/nfc/nci.h> +#include <net/nfc/nci_core.h> + +/* Handle NCI Response packets */ + +static void nci_core_reset_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct nci_core_reset_rsp *rsp = (void *) skb->data; + + pr_debug("status 0x%x\n", rsp->status); + + if (rsp->status == NCI_STATUS_OK) { + ndev->nci_ver = rsp->nci_ver; + pr_debug("nci_ver 0x%x, config_status 0x%x\n", + rsp->nci_ver, rsp->config_status); + } + + nci_req_complete(ndev, rsp->status); +} + +static void nci_core_init_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + struct nci_core_init_rsp_1 *rsp_1 = (void *) skb->data; + struct nci_core_init_rsp_2 *rsp_2; + + pr_debug("status 0x%x\n", rsp_1->status); + + if (rsp_1->status != NCI_STATUS_OK) + goto exit; + + ndev->nfcc_features = __le32_to_cpu(rsp_1->nfcc_features); + ndev->num_supported_rf_interfaces = rsp_1->num_supported_rf_interfaces; + + if (ndev->num_supported_rf_interfaces > + NCI_MAX_SUPPORTED_RF_INTERFACES) { + ndev->num_supported_rf_interfaces = + NCI_MAX_SUPPORTED_RF_INTERFACES; + } + + memcpy(ndev->supported_rf_interfaces, + rsp_1->supported_rf_interfaces, + ndev->num_supported_rf_interfaces); + + rsp_2 = (void *) (skb->data + 6 + rsp_1->num_supported_rf_interfaces); + + ndev->max_logical_connections = rsp_2->max_logical_connections; + ndev->max_routing_table_size = + __le16_to_cpu(rsp_2->max_routing_table_size); + ndev->max_ctrl_pkt_payload_len = + rsp_2->max_ctrl_pkt_payload_len; + ndev->max_size_for_large_params = + __le16_to_cpu(rsp_2->max_size_for_large_params); + ndev->manufact_id = + rsp_2->manufact_id; + ndev->manufact_specific_info = + __le32_to_cpu(rsp_2->manufact_specific_info); + + pr_debug("nfcc_features 0x%x\n", + ndev->nfcc_features); + pr_debug("num_supported_rf_interfaces %d\n", + ndev->num_supported_rf_interfaces); + pr_debug("supported_rf_interfaces[0] 0x%x\n", + ndev->supported_rf_interfaces[0]); + pr_debug("supported_rf_interfaces[1] 0x%x\n", + ndev->supported_rf_interfaces[1]); + pr_debug("supported_rf_interfaces[2] 0x%x\n", + ndev->supported_rf_interfaces[2]); + pr_debug("supported_rf_interfaces[3] 0x%x\n", + ndev->supported_rf_interfaces[3]); + pr_debug("max_logical_connections %d\n", + ndev->max_logical_connections); + pr_debug("max_routing_table_size %d\n", + ndev->max_routing_table_size); + pr_debug("max_ctrl_pkt_payload_len %d\n", + ndev->max_ctrl_pkt_payload_len); + pr_debug("max_size_for_large_params %d\n", + ndev->max_size_for_large_params); + pr_debug("manufact_id 0x%x\n", + ndev->manufact_id); + pr_debug("manufact_specific_info 0x%x\n", + ndev->manufact_specific_info); + +exit: + nci_req_complete(ndev, rsp_1->status); +} + +static void nci_core_set_config_rsp_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + struct nci_core_set_config_rsp *rsp = (void *) skb->data; + + pr_debug("status 0x%x\n", rsp->status); + + nci_req_complete(ndev, rsp->status); +} + +static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + pr_debug("status 0x%x\n", status); + + nci_req_complete(ndev, status); +} + +static void nci_rf_disc_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + pr_debug("status 0x%x\n", status); + + if (status == NCI_STATUS_OK) + atomic_set(&ndev->state, NCI_DISCOVERY); + + nci_req_complete(ndev, status); +} + +static void nci_rf_disc_select_rsp_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + pr_debug("status 0x%x\n", status); + + /* Complete the request on intf_activated_ntf or generic_error_ntf */ + if (status != NCI_STATUS_OK) + nci_req_complete(ndev, status); +} + +static void nci_rf_deactivate_rsp_packet(struct nci_dev *ndev, + struct sk_buff *skb) +{ + __u8 status = skb->data[0]; + + pr_debug("status 0x%x\n", status); + + /* If target was active, complete the request only in deactivate_ntf */ + if ((status != NCI_STATUS_OK) || + (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) { + nci_clear_target_list(ndev); + atomic_set(&ndev->state, NCI_IDLE); + nci_req_complete(ndev, status); + } +} + +void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb) +{ + __u16 rsp_opcode = nci_opcode(skb->data); + + /* we got a rsp, stop the cmd timer */ + del_timer(&ndev->cmd_timer); + + pr_debug("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", + nci_pbf(skb->data), + nci_opcode_gid(rsp_opcode), + nci_opcode_oid(rsp_opcode), + nci_plen(skb->data)); + + /* strip the nci control header */ + skb_pull(skb, NCI_CTRL_HDR_SIZE); + + switch (rsp_opcode) { + case NCI_OP_CORE_RESET_RSP: + nci_core_reset_rsp_packet(ndev, skb); + break; + + case NCI_OP_CORE_INIT_RSP: + nci_core_init_rsp_packet(ndev, skb); + break; + + case NCI_OP_CORE_SET_CONFIG_RSP: + nci_core_set_config_rsp_packet(ndev, skb); + break; + + case NCI_OP_RF_DISCOVER_MAP_RSP: + nci_rf_disc_map_rsp_packet(ndev, skb); + break; + + case NCI_OP_RF_DISCOVER_RSP: + nci_rf_disc_rsp_packet(ndev, skb); + break; + + case NCI_OP_RF_DISCOVER_SELECT_RSP: + nci_rf_disc_select_rsp_packet(ndev, skb); + break; + + case NCI_OP_RF_DEACTIVATE_RSP: + nci_rf_deactivate_rsp_packet(ndev, skb); + break; + + default: + pr_err("unknown rsp opcode 0x%x\n", rsp_opcode); + break; + } + + kfree_skb(skb); + + /* trigger the next cmd */ + atomic_set(&ndev->cmd_cnt, 1); + if (!skb_queue_empty(&ndev->cmd_q)) + queue_work(ndev->cmd_wq, &ndev->cmd_work); +} |