[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/nfc/nci/data.c b/src/kernel/linux/v4.14/net/nfc/nci/data.c
new file mode 100644
index 0000000..5405d07
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/nfc/nci/data.c
@@ -0,0 +1,311 @@
+/*
+ * The NFC Controller Interface is the communication protocol between an
+ * NFC Controller (NFCC) and a Device Host (DH).
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2014 Marvell International Ltd.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#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,
+ __u8 conn_id, int err)
+{
+ struct nci_conn_info *conn_info;
+ data_exchange_cb_t cb;
+ void *cb_context;
+
+ conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+ if (!conn_info) {
+ kfree_skb(skb);
+ goto exit;
+ }
+
+ cb = conn_info->data_exchange_cb;
+ cb_context = conn_info->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) {
+ /* 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);
+ }
+
+exit:
+ 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 = 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);
+}
+
+int nci_conn_max_data_pkt_payload_size(struct nci_dev *ndev, __u8 conn_id)
+{
+ struct nci_conn_info *conn_info;
+
+ conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+ if (!conn_info)
+ return -EPROTO;
+
+ return conn_info->max_pkt_payload_len;
+}
+EXPORT_SYMBOL(nci_conn_max_data_pkt_payload_size);
+
+static int nci_queue_tx_data_frags(struct nci_dev *ndev,
+ __u8 conn_id,
+ struct sk_buff *skb) {
+ struct nci_conn_info *conn_info;
+ 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);
+
+ conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+ if (!conn_info) {
+ rc = -EPROTO;
+ goto exit;
+ }
+
+ __skb_queue_head_init(&frags_q);
+
+ while (total_len) {
+ frag_len =
+ min_t(int, total_len, conn_info->max_pkt_payload_len);
+
+ 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 */
+ skb_put_data(skb_frag, 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)
+{
+ struct nci_conn_info *conn_info;
+ int rc = 0;
+
+ pr_debug("conn_id 0x%x, plen %d\n", conn_id, skb->len);
+
+ conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
+ if (!conn_info) {
+ rc = -EPROTO;
+ goto free_exit;
+ }
+
+ /* check if the packet need to be fragmented */
+ if (skb->len <= conn_info->max_pkt_payload_len) {
+ /* 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;
+ }
+ }
+
+ ndev->cur_conn_id = conn_id;
+ queue_work(ndev->tx_wq, &ndev->tx_work);
+
+ goto exit;
+
+free_exit:
+ kfree_skb(skb);
+
+exit:
+ return rc;
+}
+EXPORT_SYMBOL(nci_send_data);
+
+/* ----------------- NCI RX Data ----------------- */
+
+static void nci_add_rx_data_frag(struct nci_dev *ndev,
+ struct sk_buff *skb,
+ __u8 pbf, __u8 conn_id, __u8 status)
+{
+ int reassembly_len;
+ int err = 0;
+
+ if (status) {
+ err = status;
+ goto exit;
+ }
+
+ 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:
+ if (ndev->nfc_dev->rf_mode == NFC_RF_TARGET) {
+ /* Data received in Target mode, forward to nfc core */
+ err = nfc_tm_data_received(ndev->nfc_dev, skb);
+ if (err)
+ pr_err("unable to handle received data\n");
+ } else {
+ nci_data_exchange_complete(ndev, skb, conn_id, err);
+ }
+}
+
+/* Rx Data packet */
+void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb)
+{
+ __u8 pbf = nci_pbf(skb->data);
+ __u8 status = 0;
+ __u8 conn_id = nci_conn_id(skb->data);
+ struct nci_conn_info *conn_info;
+
+ 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));
+
+ conn_info = nci_get_conn_info_by_conn_id(ndev, nci_conn_id(skb->data));
+ if (!conn_info)
+ return;
+
+ /* strip the nci data header */
+ skb_pull(skb, NCI_DATA_HDR_SIZE);
+
+ if (ndev->target_active_prot == NFC_PROTO_MIFARE ||
+ ndev->target_active_prot == NFC_PROTO_JEWEL ||
+ ndev->target_active_prot == NFC_PROTO_FELICA ||
+ ndev->target_active_prot == NFC_PROTO_ISO15693) {
+ /* frame I/F => remove the status byte */
+ pr_debug("frame I/F => remove the status byte\n");
+ status = skb->data[skb->len - 1];
+ skb_trim(skb, (skb->len - 1));
+ }
+
+ nci_add_rx_data_frag(ndev, skb, pbf, conn_id, nci_to_errno(status));
+}