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Diffstat (limited to 'net/nfc/nci/rsp.c')
-rw-r--r--net/nfc/nci/rsp.c226
1 files changed, 226 insertions, 0 deletions
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
new file mode 100644
index 00000000000..0403d4cd091
--- /dev/null
+++ b/net/nfc/nci/rsp.c
@@ -0,0 +1,226 @@
+/*
+ * 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
+ *
+ */
+
+#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;
+
+ nfc_dbg("entry, status 0x%x", rsp->status);
+
+ if (rsp->status == NCI_STATUS_OK)
+ ndev->nci_ver = rsp->nci_ver;
+
+ nfc_dbg("nci_ver 0x%x", ndev->nci_ver);
+
+ 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;
+
+ nfc_dbg("entry, status 0x%x", rsp_1->status);
+
+ if (rsp_1->status != NCI_STATUS_OK)
+ return;
+
+ 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 + ndev->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_control_packet_payload_length =
+ rsp_2->max_control_packet_payload_length;
+ ndev->rf_sending_buffer_size =
+ __le16_to_cpu(rsp_2->rf_sending_buffer_size);
+ ndev->rf_receiving_buffer_size =
+ __le16_to_cpu(rsp_2->rf_receiving_buffer_size);
+ ndev->manufacturer_id =
+ __le16_to_cpu(rsp_2->manufacturer_id);
+
+ nfc_dbg("nfcc_features 0x%x",
+ ndev->nfcc_features);
+ nfc_dbg("num_supported_rf_interfaces %d",
+ ndev->num_supported_rf_interfaces);
+ nfc_dbg("supported_rf_interfaces[0] 0x%x",
+ ndev->supported_rf_interfaces[0]);
+ nfc_dbg("supported_rf_interfaces[1] 0x%x",
+ ndev->supported_rf_interfaces[1]);
+ nfc_dbg("supported_rf_interfaces[2] 0x%x",
+ ndev->supported_rf_interfaces[2]);
+ nfc_dbg("supported_rf_interfaces[3] 0x%x",
+ ndev->supported_rf_interfaces[3]);
+ nfc_dbg("max_logical_connections %d",
+ ndev->max_logical_connections);
+ nfc_dbg("max_routing_table_size %d",
+ ndev->max_routing_table_size);
+ nfc_dbg("max_control_packet_payload_length %d",
+ ndev->max_control_packet_payload_length);
+ nfc_dbg("rf_sending_buffer_size %d",
+ ndev->rf_sending_buffer_size);
+ nfc_dbg("rf_receiving_buffer_size %d",
+ ndev->rf_receiving_buffer_size);
+ nfc_dbg("manufacturer_id 0x%x",
+ ndev->manufacturer_id);
+
+ nci_req_complete(ndev, rsp_1->status);
+}
+
+static void nci_core_conn_create_rsp_packet(struct nci_dev *ndev,
+ struct sk_buff *skb)
+{
+ struct nci_core_conn_create_rsp *rsp = (void *) skb->data;
+
+ nfc_dbg("entry, status 0x%x", rsp->status);
+
+ if (rsp->status != NCI_STATUS_OK)
+ return;
+
+ ndev->max_pkt_payload_size = rsp->max_pkt_payload_size;
+ ndev->initial_num_credits = rsp->initial_num_credits;
+ ndev->conn_id = rsp->conn_id;
+
+ atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
+
+ nfc_dbg("max_pkt_payload_size %d", ndev->max_pkt_payload_size);
+ nfc_dbg("initial_num_credits %d", ndev->initial_num_credits);
+ nfc_dbg("conn_id %d", ndev->conn_id);
+}
+
+static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
+ struct sk_buff *skb)
+{
+ __u8 status = skb->data[0];
+
+ nfc_dbg("entry, status 0x%x", 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];
+
+ nfc_dbg("entry, status 0x%x", status);
+
+ if (status == NCI_STATUS_OK)
+ set_bit(NCI_DISCOVERY, &ndev->flags);
+
+ 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];
+
+ nfc_dbg("entry, status 0x%x", status);
+
+ clear_bit(NCI_DISCOVERY, &ndev->flags);
+
+ 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);
+
+ nfc_dbg("NCI RX: MT=rsp, PBF=%d, GID=0x%x, OID=0x%x, plen=%d",
+ 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_CONN_CREATE_RSP:
+ nci_core_conn_create_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_DEACTIVATE_RSP:
+ nci_rf_deactivate_rsp_packet(ndev, skb);
+ break;
+
+ default:
+ nfc_err("unknown rsp opcode 0x%x", 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);
+}
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