Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / nfc / st21nfcb / st21nfcb.c

diff --git a/kernel/drivers/nfc/st21nfcb/st21nfcb.c b/kernel/drivers/nfc/st21nfcb/st21nfcb.c
new file mode 100644 (file)
index 0000000..ca9871a
--- /dev/null
+++ b/kernel/drivers/nfc/st21nfcb/st21nfcb.c
@@ -0,0 +1,143 @@
+/*
+ * NCI based Driver for STMicroelectronics NFC Chip
+ *
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+
+#include "st21nfcb.h"
+#include "st21nfcb_se.h"
+
+#define DRIVER_DESC "NCI NFC driver for ST21NFCB"
+
+#define ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 0x83
+
+static int st21nfcb_nci_open(struct nci_dev *ndev)
+{
+       struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+       int r;
+
+       if (test_and_set_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+               return 0;
+
+       r = ndlc_open(info->ndlc);
+       if (r)
+               clear_bit(ST21NFCB_NCI_RUNNING, &info->flags);
+
+       return r;
+}
+
+static int st21nfcb_nci_close(struct nci_dev *ndev)
+{
+       struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+       if (!test_and_clear_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+               return 0;
+
+       ndlc_close(info->ndlc);
+
+       return 0;
+}
+
+static int st21nfcb_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
+{
+       struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+       skb->dev = (void *)ndev;
+
+       if (!test_bit(ST21NFCB_NCI_RUNNING, &info->flags))
+               return -EBUSY;
+
+       return ndlc_send(info->ndlc, skb);
+}
+
+static __u32 st21nfcb_nci_get_rfprotocol(struct nci_dev *ndev,
+                                        __u8 rf_protocol)
+{
+       return rf_protocol == ST21NFCB_NCI1_X_PROPRIETARY_ISO15693 ?
+               NFC_PROTO_ISO15693_MASK : 0;
+}
+
+static struct nci_ops st21nfcb_nci_ops = {
+       .open = st21nfcb_nci_open,
+       .close = st21nfcb_nci_close,
+       .send = st21nfcb_nci_send,
+       .get_rfprotocol = st21nfcb_nci_get_rfprotocol,
+       .discover_se = st21nfcb_nci_discover_se,
+       .enable_se = st21nfcb_nci_enable_se,
+       .disable_se = st21nfcb_nci_disable_se,
+       .se_io = st21nfcb_nci_se_io,
+       .hci_load_session = st21nfcb_hci_load_session,
+       .hci_event_received = st21nfcb_hci_event_received,
+       .hci_cmd_received = st21nfcb_hci_cmd_received,
+};
+
+int st21nfcb_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
+                      int phy_tailroom)
+{
+       struct st21nfcb_nci_info *info;
+       int r;
+       u32 protocols;
+
+       info = devm_kzalloc(ndlc->dev,
+                       sizeof(struct st21nfcb_nci_info), GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+
+       protocols = NFC_PROTO_JEWEL_MASK
+               | NFC_PROTO_MIFARE_MASK
+               | NFC_PROTO_FELICA_MASK
+               | NFC_PROTO_ISO14443_MASK
+               | NFC_PROTO_ISO14443_B_MASK
+               | NFC_PROTO_ISO15693_MASK
+               | NFC_PROTO_NFC_DEP_MASK;
+
+       ndlc->ndev = nci_allocate_device(&st21nfcb_nci_ops, protocols,
+                                       phy_headroom, phy_tailroom);
+       if (!ndlc->ndev) {
+               pr_err("Cannot allocate nfc ndev\n");
+               return -ENOMEM;
+       }
+       info->ndlc = ndlc;
+
+       nci_set_drvdata(ndlc->ndev, info);
+
+       r = nci_register_device(ndlc->ndev);
+       if (r) {
+               pr_err("Cannot register nfc device to nci core\n");
+               nci_free_device(ndlc->ndev);
+               return r;
+       }
+
+       return st21nfcb_se_init(ndlc->ndev);
+}
+EXPORT_SYMBOL_GPL(st21nfcb_nci_probe);
+
+void st21nfcb_nci_remove(struct nci_dev *ndev)
+{
+       struct st21nfcb_nci_info *info = nci_get_drvdata(ndev);
+
+       nci_unregister_device(ndev);
+       nci_free_device(ndev);
+       kfree(info);
+}
+EXPORT_SYMBOL_GPL(st21nfcb_nci_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);