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@@ -0,0 +1,790 @@
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+/*
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+ * The NFC Controller Interface is the communication protocol between an
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+ * NFC Controller (NFCC) and a Device Host (DH).
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+ *
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+ * Copyright (C) 2011 Texas Instruments, Inc.
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+ *
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+ * Written by Ilan Elias <ilane@ti.com>
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+ *
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+ * Acknowledgements:
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+ * This file is based on hci_core.c, which was written
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+ * by Maxim Krasnyansky.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2
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+ * as published by the Free Software Foundation
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ *
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+ */
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+
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+#include <linux/types.h>
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+#include <linux/workqueue.h>
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+#include <linux/completion.h>
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+#include <linux/sched.h>
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+#include <linux/bitops.h>
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+#include <linux/skbuff.h>
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+
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+#include "../nfc.h"
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+#include <net/nfc/nci.h>
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+#include <net/nfc/nci_core.h>
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+#include <linux/nfc.h>
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+
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+static void nci_cmd_work(struct work_struct *work);
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+static void nci_rx_work(struct work_struct *work);
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+static void nci_tx_work(struct work_struct *work);
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+
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+/* ---- NCI requests ---- */
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+
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+void nci_req_complete(struct nci_dev *ndev, int result)
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+{
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+ if (ndev->req_status == NCI_REQ_PEND) {
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+ ndev->req_result = result;
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+ ndev->req_status = NCI_REQ_DONE;
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+ complete(&ndev->req_completion);
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+ }
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+}
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+
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+static void nci_req_cancel(struct nci_dev *ndev, int err)
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+{
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+ if (ndev->req_status == NCI_REQ_PEND) {
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+ ndev->req_result = err;
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+ ndev->req_status = NCI_REQ_CANCELED;
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+ complete(&ndev->req_completion);
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+ }
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+}
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+
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+/* Execute request and wait for completion. */
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+static int __nci_request(struct nci_dev *ndev,
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+ void (*req)(struct nci_dev *ndev, unsigned long opt),
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+ unsigned long opt,
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+ __u32 timeout)
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+{
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+ int rc = 0;
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+ unsigned long completion_rc;
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+
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+ ndev->req_status = NCI_REQ_PEND;
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+
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+ init_completion(&ndev->req_completion);
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+ req(ndev, opt);
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+ completion_rc = wait_for_completion_interruptible_timeout(
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+ &ndev->req_completion,
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+ timeout);
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+
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+ nfc_dbg("wait_for_completion return %ld", completion_rc);
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+
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+ if (completion_rc > 0) {
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+ switch (ndev->req_status) {
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+ case NCI_REQ_DONE:
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+ rc = nci_to_errno(ndev->req_result);
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+ break;
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+
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+ case NCI_REQ_CANCELED:
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+ rc = -ndev->req_result;
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+ break;
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+
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+ default:
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+ rc = -ETIMEDOUT;
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+ break;
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+ }
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+ } else {
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+ nfc_err("wait_for_completion_interruptible_timeout failed %ld",
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+ completion_rc);
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+
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+ rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
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+ }
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+
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+ ndev->req_status = ndev->req_result = 0;
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+
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+ return rc;
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+}
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+
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+static inline int nci_request(struct nci_dev *ndev,
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+ void (*req)(struct nci_dev *ndev, unsigned long opt),
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+ unsigned long opt, __u32 timeout)
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+{
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+ int rc;
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+
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+ if (!test_bit(NCI_UP, &ndev->flags))
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+ return -ENETDOWN;
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+
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+ /* Serialize all requests */
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+ mutex_lock(&ndev->req_lock);
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+ rc = __nci_request(ndev, req, opt, timeout);
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+ mutex_unlock(&ndev->req_lock);
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+
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+ return rc;
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+}
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+
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+static void nci_reset_req(struct nci_dev *ndev, unsigned long opt)
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+{
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+ nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 0, NULL);
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+}
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+
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+static void nci_init_req(struct nci_dev *ndev, unsigned long opt)
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+{
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+ nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
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+}
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+
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+static void nci_init_complete_req(struct nci_dev *ndev, unsigned long opt)
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+{
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+ struct nci_rf_disc_map_cmd cmd;
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+ struct nci_core_conn_create_cmd conn_cmd;
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+ int i;
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+
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+ /* create static rf connection */
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+ conn_cmd.target_handle = 0;
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+ conn_cmd.num_target_specific_params = 0;
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+ nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, 2, &conn_cmd);
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+
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+ /* set rf mapping configurations */
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+ cmd.num_mapping_configs = 0;
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+
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+ /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
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+ for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
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+ if (ndev->supported_rf_interfaces[i] ==
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+ NCI_RF_INTERFACE_ISO_DEP) {
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .mode = NCI_DISC_MAP_MODE_BOTH;
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .rf_interface_type = NCI_RF_INTERFACE_ISO_DEP;
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+ cmd.num_mapping_configs++;
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+ } else if (ndev->supported_rf_interfaces[i] ==
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+ NCI_RF_INTERFACE_NFC_DEP) {
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .mode = NCI_DISC_MAP_MODE_BOTH;
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+ cmd.mapping_configs[cmd.num_mapping_configs]
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+ .rf_interface_type = NCI_RF_INTERFACE_NFC_DEP;
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+ cmd.num_mapping_configs++;
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+ }
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+
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+ if (cmd.num_mapping_configs == NCI_MAX_NUM_MAPPING_CONFIGS)
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+ break;
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+ }
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+
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+ nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
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+ (1 + (cmd.num_mapping_configs*sizeof(struct disc_map_config))),
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+ &cmd);
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+}
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+
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+static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
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+{
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+ struct nci_rf_disc_cmd cmd;
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+ __u32 protocols = opt;
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+
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+ cmd.num_disc_configs = 0;
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+
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+ if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
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+ (protocols & NFC_PROTO_JEWEL_MASK
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+ || protocols & NFC_PROTO_MIFARE_MASK
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+ || protocols & NFC_PROTO_ISO14443_MASK
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+ || protocols & NFC_PROTO_NFC_DEP_MASK)) {
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+ cmd.disc_configs[cmd.num_disc_configs].type =
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+ NCI_DISCOVERY_TYPE_POLL_A_PASSIVE;
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+ cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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+ cmd.num_disc_configs++;
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+ }
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+
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+ if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
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+ (protocols & NFC_PROTO_ISO14443_MASK)) {
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+ cmd.disc_configs[cmd.num_disc_configs].type =
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+ NCI_DISCOVERY_TYPE_POLL_B_PASSIVE;
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+ cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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+ cmd.num_disc_configs++;
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+ }
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+
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+ if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
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+ (protocols & NFC_PROTO_FELICA_MASK
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+ || protocols & NFC_PROTO_NFC_DEP_MASK)) {
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+ cmd.disc_configs[cmd.num_disc_configs].type =
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+ NCI_DISCOVERY_TYPE_POLL_F_PASSIVE;
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+ cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
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+ cmd.num_disc_configs++;
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+ }
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+
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+ nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
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+ (1 + (cmd.num_disc_configs*sizeof(struct disc_config))),
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+ &cmd);
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+}
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+
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+static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
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+{
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+ struct nci_rf_deactivate_cmd cmd;
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+
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+ cmd.type = NCI_DEACTIVATE_TYPE_IDLE_MODE;
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+
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+ nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
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+ sizeof(struct nci_rf_deactivate_cmd),
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+ &cmd);
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+}
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+
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+static int nci_open_device(struct nci_dev *ndev)
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+{
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+ int rc = 0;
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+
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+ mutex_lock(&ndev->req_lock);
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+
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+ if (test_bit(NCI_UP, &ndev->flags)) {
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+ rc = -EALREADY;
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+ goto done;
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+ }
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+
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+ if (ndev->ops->open(ndev)) {
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+ rc = -EIO;
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+ goto done;
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+ }
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+
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+ atomic_set(&ndev->cmd_cnt, 1);
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+
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+ set_bit(NCI_INIT, &ndev->flags);
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+
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+ rc = __nci_request(ndev, nci_reset_req, 0,
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+ msecs_to_jiffies(NCI_RESET_TIMEOUT));
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+
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+ if (!rc) {
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+ rc = __nci_request(ndev, nci_init_req, 0,
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+ msecs_to_jiffies(NCI_INIT_TIMEOUT));
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+ }
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+
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+ if (!rc) {
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+ rc = __nci_request(ndev, nci_init_complete_req, 0,
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+ msecs_to_jiffies(NCI_INIT_TIMEOUT));
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+ }
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+
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+ clear_bit(NCI_INIT, &ndev->flags);
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+
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+ if (!rc) {
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+ set_bit(NCI_UP, &ndev->flags);
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+ } else {
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+ /* Init failed, cleanup */
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+ skb_queue_purge(&ndev->cmd_q);
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+ skb_queue_purge(&ndev->rx_q);
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+ skb_queue_purge(&ndev->tx_q);
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+
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+ ndev->ops->close(ndev);
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+ ndev->flags = 0;
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+ }
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+
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+done:
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+ mutex_unlock(&ndev->req_lock);
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+ return rc;
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+}
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+
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+static int nci_close_device(struct nci_dev *ndev)
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+{
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+ nci_req_cancel(ndev, ENODEV);
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+ mutex_lock(&ndev->req_lock);
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+
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+ if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
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+ del_timer_sync(&ndev->cmd_timer);
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+ mutex_unlock(&ndev->req_lock);
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+ return 0;
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+ }
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+
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+ /* Drop RX and TX queues */
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+ skb_queue_purge(&ndev->rx_q);
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+ skb_queue_purge(&ndev->tx_q);
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+
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+ /* Flush RX and TX wq */
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+ flush_workqueue(ndev->rx_wq);
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+ flush_workqueue(ndev->tx_wq);
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+
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+ /* Reset device */
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+ skb_queue_purge(&ndev->cmd_q);
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+ atomic_set(&ndev->cmd_cnt, 1);
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+
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+ set_bit(NCI_INIT, &ndev->flags);
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+ __nci_request(ndev, nci_reset_req, 0,
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+ msecs_to_jiffies(NCI_RESET_TIMEOUT));
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+ clear_bit(NCI_INIT, &ndev->flags);
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+
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+ /* Flush cmd wq */
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+ flush_workqueue(ndev->cmd_wq);
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+
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+ /* After this point our queues are empty
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+ * and no works are scheduled. */
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+ ndev->ops->close(ndev);
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+
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+ /* Clear flags */
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+ ndev->flags = 0;
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+
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+ mutex_unlock(&ndev->req_lock);
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+
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+ return 0;
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+}
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+
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+/* NCI command timer function */
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+static void nci_cmd_timer(unsigned long arg)
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+{
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+ struct nci_dev *ndev = (void *) arg;
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+
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+ nfc_dbg("entry");
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+
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+ atomic_set(&ndev->cmd_cnt, 1);
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+ queue_work(ndev->cmd_wq, &ndev->cmd_work);
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+}
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+
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+static int nci_dev_up(struct nfc_dev *nfc_dev)
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+{
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+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
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+
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+ nfc_dbg("entry");
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+
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+ return nci_open_device(ndev);
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+}
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+
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+static int nci_dev_down(struct nfc_dev *nfc_dev)
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+{
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+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
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+
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+ nfc_dbg("entry");
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+
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+ return nci_close_device(ndev);
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+}
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+
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+static int nci_start_poll(struct nfc_dev *nfc_dev, __u32 protocols)
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+{
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+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
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+ int rc;
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+
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+ nfc_dbg("entry");
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+
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+ if (test_bit(NCI_DISCOVERY, &ndev->flags)) {
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+ nfc_err("unable to start poll, since poll is already active");
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+ return -EBUSY;
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+ }
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+
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+ if (test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
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+ nfc_dbg("target already active, first deactivate...");
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+
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+ rc = nci_request(ndev, nci_rf_deactivate_req, 0,
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+ msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
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+ if (rc)
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+ return -EBUSY;
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+ }
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+
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+ rc = nci_request(ndev, nci_rf_discover_req, protocols,
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+ msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
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+
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+ if (!rc)
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+ ndev->poll_prots = protocols;
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+
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+ return rc;
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+}
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+
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+static void nci_stop_poll(struct nfc_dev *nfc_dev)
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+{
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+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
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+
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+ nfc_dbg("entry");
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+
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+ if (!test_bit(NCI_DISCOVERY, &ndev->flags)) {
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+ nfc_err("unable to stop poll, since poll is not active");
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+ return;
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+ }
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+
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+ 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, __u32 target_idx,
|
|
|
+ __u32 protocol)
|
|
|
+{
|
|
|
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
|
+
|
|
|
+ nfc_dbg("entry, target_idx %d, protocol 0x%x", target_idx, protocol);
|
|
|
+
|
|
|
+ if (!test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
|
|
|
+ nfc_err("there is no available target to activate");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ndev->target_active_prot) {
|
|
|
+ nfc_err("there is already an active target");
|
|
|
+ return -EBUSY;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!(ndev->target_available_prots & (1 << protocol))) {
|
|
|
+ nfc_err("target does not support the requested protocol 0x%x",
|
|
|
+ protocol);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ ndev->target_active_prot = protocol;
|
|
|
+ ndev->target_available_prots = 0;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void nci_deactivate_target(struct nfc_dev *nfc_dev, __u32 target_idx)
|
|
|
+{
|
|
|
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
|
+
|
|
|
+ nfc_dbg("entry, target_idx %d", target_idx);
|
|
|
+
|
|
|
+ if (!ndev->target_active_prot) {
|
|
|
+ nfc_err("unable to deactivate target, no active target");
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ ndev->target_active_prot = 0;
|
|
|
+
|
|
|
+ if (test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
|
|
|
+ nci_request(ndev, nci_rf_deactivate_req, 0,
|
|
|
+ msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int nci_data_exchange(struct nfc_dev *nfc_dev, __u32 target_idx,
|
|
|
+ struct sk_buff *skb,
|
|
|
+ data_exchange_cb_t cb,
|
|
|
+ void *cb_context)
|
|
|
+{
|
|
|
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
|
|
|
+
|
|
|
+ nfc_dbg("entry, target_idx %d, len %d", target_idx, skb->len);
|
|
|
+
|
|
|
+ if (!ndev->target_active_prot) {
|
|
|
+ nfc_err("unable to exchange data, no active target");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* store cb and context to be used on receiving data */
|
|
|
+ ndev->data_exchange_cb = cb;
|
|
|
+ ndev->data_exchange_cb_context = cb_context;
|
|
|
+
|
|
|
+ return nci_send_data(ndev, ndev->conn_id, skb);
|
|
|
+}
|
|
|
+
|
|
|
+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,
|
|
|
+ .activate_target = nci_activate_target,
|
|
|
+ .deactivate_target = nci_deactivate_target,
|
|
|
+ .data_exchange = nci_data_exchange,
|
|
|
+};
|
|
|
+
|
|
|
+/* ---- Interface to NCI drivers ---- */
|
|
|
+
|
|
|
+/**
|
|
|
+ * nci_allocate_device - allocate a new nci device
|
|
|
+ *
|
|
|
+ * @ops: device operations
|
|
|
+ * @supported_protocols: NFC protocols supported by the device
|
|
|
+ */
|
|
|
+struct nci_dev *nci_allocate_device(struct nci_ops *ops,
|
|
|
+ __u32 supported_protocols,
|
|
|
+ int tx_headroom,
|
|
|
+ int tx_tailroom)
|
|
|
+{
|
|
|
+ struct nci_dev *ndev = NULL;
|
|
|
+
|
|
|
+ nfc_dbg("entry, supported_protocols 0x%x", supported_protocols);
|
|
|
+
|
|
|
+ if (!ops->open || !ops->close || !ops->send)
|
|
|
+ goto exit;
|
|
|
+
|
|
|
+ if (!supported_protocols)
|
|
|
+ goto exit;
|
|
|
+
|
|
|
+ ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
|
|
|
+ if (!ndev)
|
|
|
+ goto exit;
|
|
|
+
|
|
|
+ ndev->ops = ops;
|
|
|
+ ndev->tx_headroom = tx_headroom;
|
|
|
+ ndev->tx_tailroom = tx_tailroom;
|
|
|
+
|
|
|
+ ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
|
|
|
+ supported_protocols,
|
|
|
+ tx_headroom + NCI_DATA_HDR_SIZE,
|
|
|
+ tx_tailroom);
|
|
|
+ if (!ndev->nfc_dev)
|
|
|
+ goto free_exit;
|
|
|
+
|
|
|
+ nfc_set_drvdata(ndev->nfc_dev, ndev);
|
|
|
+
|
|
|
+ goto exit;
|
|
|
+
|
|
|
+free_exit:
|
|
|
+ kfree(ndev);
|
|
|
+
|
|
|
+exit:
|
|
|
+ return ndev;
|
|
|
+}
|
|
|
+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_dbg("entry");
|
|
|
+
|
|
|
+ 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];
|
|
|
+
|
|
|
+ nfc_dbg("entry");
|
|
|
+
|
|
|
+ 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);
|
|
|
+
|
|
|
+ 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)
|
|
|
+{
|
|
|
+ nfc_dbg("entry");
|
|
|
+
|
|
|
+ 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;
|
|
|
+
|
|
|
+ nfc_dbg("entry, len %d", 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;
|
|
|
+
|
|
|
+ nfc_dbg("entry, len %d", 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;
|
|
|
+
|
|
|
+ nfc_dbg("entry, opcode 0x%x, plen %d", opcode, plen);
|
|
|
+
|
|
|
+ skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
|
|
|
+ if (!skb) {
|
|
|
+ nfc_err("no memory for command");
|
|
|
+ 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;
|
|
|
+
|
|
|
+ nfc_dbg("entry, credits_cnt %d", atomic_read(&ndev->credits_cnt));
|
|
|
+
|
|
|
+ /* Send queued tx data */
|
|
|
+ while (atomic_read(&ndev->credits_cnt)) {
|
|
|
+ skb = skb_dequeue(&ndev->tx_q);
|
|
|
+ if (!skb)
|
|
|
+ return;
|
|
|
+
|
|
|
+ atomic_dec(&ndev->credits_cnt);
|
|
|
+
|
|
|
+ nfc_dbg("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d",
|
|
|
+ nci_pbf(skb->data),
|
|
|
+ nci_conn_id(skb->data),
|
|
|
+ nci_plen(skb->data));
|
|
|
+
|
|
|
+ nci_send_frame(skb);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/* ----- 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:
|
|
|
+ nfc_err("unknown MT 0x%x", nci_mt(skb->data));
|
|
|
+ kfree_skb(skb);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/* ----- 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;
|
|
|
+
|
|
|
+ nfc_dbg("entry, cmd_cnt %d", 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);
|
|
|
+
|
|
|
+ nfc_dbg("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d",
|
|
|
+ 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));
|
|
|
+ }
|
|
|
+}
|
Ilan Elias