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authorFrederic Danis <frederic.danis@linux.intel.com>2013-05-29 13:35:02 (GMT)
committerSamuel Ortiz <sameo@linux.intel.com>2013-06-14 11:44:03 (GMT)
commit8a00a61b0ef2bfd1b468dd20c0d0b1a94a8f7475 (patch)
tree04438ab0d31ae79e0970cc7f901dd5605a5f4ec1 /include/net/nfc
parenta395298c9c96748cbd6acee4cb9a5ba13fbb3ab8 (diff)
downloadlinux-8a00a61b0ef2bfd1b468dd20c0d0b1a94a8f7475.tar.xz
NFC: Add basic NCI over SPI
The NFC Forum defines a transport interface based on Serial Peripheral Interface (SPI) for the NFC Controller Interface (NCI). This module implements the SPI transport of NCI, calling SPI module directly to read/write data to NFC controller (NFCC). NFCC driver should provide functions performing device open and close. It should also provide functions asserting/de-asserting interruption to prevent TX/RX race conditions. NFCC driver can also fix a delay between transactions if needed by the hardware. Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'include/net/nfc')
-rw-r--r--include/net/nfc/nci_core.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
index 1009d3d..3b05beb 100644
--- a/include/net/nfc/nci_core.h
+++ b/include/net/nfc/nci_core.h
@@ -3,6 +3,7 @@
* NFC Controller (NFCC) and a Device Host (DH).
*
* Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
*
* Written by Ilan Elias <ilane@ti.com>
*
@@ -202,4 +203,52 @@ void nci_req_complete(struct nci_dev *ndev, int result);
/* ----- NCI status code ----- */
int nci_to_errno(__u8 code);
+/* ----- NCI over SPI acknowledge modes ----- */
+#define NCI_SPI_CRC_DISABLED 0x00
+#define NCI_SPI_CRC_ENABLED 0x01
+
+/* ----- NCI SPI structures ----- */
+struct nci_spi_dev;
+
+struct nci_spi_ops {
+ int (*open)(struct nci_spi_dev *ndev);
+ int (*close)(struct nci_spi_dev *ndev);
+ void (*assert_int)(struct nci_spi_dev *ndev);
+ void (*deassert_int)(struct nci_spi_dev *ndev);
+};
+
+struct nci_spi_dev {
+ struct nci_dev *nci_dev;
+ struct spi_device *spi;
+ struct nci_spi_ops *ops;
+
+ unsigned int xfer_udelay; /* microseconds delay between
+ transactions */
+ u8 acknowledge_mode;
+
+ void *driver_data;
+};
+
+/* ----- NCI SPI Devices ----- */
+struct nci_spi_dev *nci_spi_allocate_device(struct spi_device *spi,
+ struct nci_spi_ops *ops,
+ u32 supported_protocols,
+ u32 supported_se,
+ u8 acknowledge_mode,
+ unsigned int delay);
+void nci_spi_free_device(struct nci_spi_dev *ndev);
+int nci_spi_register_device(struct nci_spi_dev *ndev);
+void nci_spi_unregister_device(struct nci_spi_dev *ndev);
+
+static inline void nci_spi_set_drvdata(struct nci_spi_dev *ndev,
+ void *data)
+{
+ ndev->driver_data = data;
+}
+
+static inline void *nci_spi_get_drvdata(struct nci_spi_dev *ndev)
+{
+ return ndev->driver_data;
+}
+
#endif /* __NCI_CORE_H */