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authorAmitkumar Karwar <akarwar@marvell.com>2014-01-07 00:58:19 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2014-01-07 04:32:40 +0400
commitf26e30cc6b50ba81e30ca3016c29ad4b48b93eaa (patch)
tree289d3ac82715154343dc304f262676087bb071bf /drivers/nfc/nfcmrvl/main.c
parent22c15bf30b70ab2eae300f093ffc64e182620aba (diff)
downloadlinux-f26e30cc6b50ba81e30ca3016c29ad4b48b93eaa.tar.xz
NFC: nfcmrvl: Initial commit for Marvell NFC driver
This patch adds NFC support for Marvell 8897 NFC-over-USB chipset. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc/nfcmrvl/main.c')
-rw-r--r--drivers/nfc/nfcmrvl/main.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c
new file mode 100644
index 000000000000..396fc270ffc3
--- /dev/null
+++ b/drivers/nfc/nfcmrvl/main.c
@@ -0,0 +1,145 @@
+/*
+ * Marvell NFC driver: major functions
+ *
+ * Copyright (C) 2014, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available on the worldwide web at
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+#include "nfcmrvl.h"
+
+#define VERSION "1.0"
+
+static int nfcmrvl_nci_open(struct nci_dev *ndev)
+{
+ struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
+ int err;
+
+ if (test_and_set_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
+ return 0;
+
+ err = priv->if_ops->nci_open(priv);
+
+ if (err)
+ clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags);
+
+ return err;
+}
+
+static int nfcmrvl_nci_close(struct nci_dev *ndev)
+{
+ struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
+
+ if (!test_and_clear_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
+ return 0;
+
+ priv->if_ops->nci_close(priv);
+
+ return 0;
+}
+
+static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
+{
+ struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
+
+ nfc_info(priv->dev, "send entry, len %d\n", skb->len);
+
+ skb->dev = (void *)ndev;
+
+ if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
+ return -EBUSY;
+
+ return priv->if_ops->nci_send(priv, skb);
+}
+
+static struct nci_ops nfcmrvl_nci_ops = {
+ .open = nfcmrvl_nci_open,
+ .close = nfcmrvl_nci_close,
+ .send = nfcmrvl_nci_send,
+};
+
+struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
+ struct nfcmrvl_if_ops *ops,
+ struct device *dev)
+{
+ struct nfcmrvl_private *priv;
+ int rc;
+ u32 protocols;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return ERR_PTR(-ENOMEM);
+
+ priv->drv_data = drv_data;
+ priv->if_ops = ops;
+ priv->dev = dev;
+
+ protocols = NFC_PROTO_JEWEL_MASK
+ | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
+ | NFC_PROTO_ISO14443_MASK
+ | NFC_PROTO_ISO14443_B_MASK
+ | NFC_PROTO_NFC_DEP_MASK;
+
+ priv->ndev = nci_allocate_device(&nfcmrvl_nci_ops, protocols, 0, 0);
+ if (!priv->ndev) {
+ nfc_err(dev, "nci_allocate_device failed");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ nci_set_drvdata(priv->ndev, priv);
+
+ rc = nci_register_device(priv->ndev);
+ if (rc) {
+ nfc_err(dev, "nci_register_device failed %d", rc);
+ nci_free_device(priv->ndev);
+ return ERR_PTR(rc);
+ }
+
+ nfc_info(dev, "registered with nci successfully\n");
+ return priv;
+}
+EXPORT_SYMBOL_GPL(nfcmrvl_nci_register_dev);
+
+void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
+{
+ struct nci_dev *ndev = priv->ndev;
+
+ nci_unregister_device(ndev);
+ nci_free_device(ndev);
+ kfree(priv);
+}
+EXPORT_SYMBOL_GPL(nfcmrvl_nci_unregister_dev);
+
+int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, void *data, int count)
+{
+ struct sk_buff *skb;
+
+ skb = nci_skb_alloc(priv->ndev, count, GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+
+ memcpy(skb_put(skb, count), data, count);
+ nci_recv_frame(priv->ndev, skb);
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(nfcmrvl_nci_recv_frame);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL v2");