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| author | Frederic Danis <frederic.danis@linux.intel.com> | 2013-05-29 15:35:04 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-06-14 13:44:16 +0200 |
| commit | 391d8a2da787257aeaf952c974405b53926e3fb3 (patch) | |
| tree | 038e24a044d3f3780c76d61a13f65c038e8c05bc /include/net | |
| parent | ee9596d467e4d05c77a8c883aeeb5b74d1a3cd31 (diff) | |
| download | linux-391d8a2da787257aeaf952c974405b53926e3fb3.tar.bz2 | |
NFC: Add NCI over SPI receive
Before any operation, driver interruption is de-asserted to prevent
race condition between TX and RX.
Transaction starts by emitting "Direct read" and acknowledged mode
bytes. Then packet length is read allowing to allocate correct NCI
socket buffer. After that payload is retrieved.
A delay after the transaction can be added.
This delay is determined by the driver during nci_spi_allocate_device()
call and can be 0.
If acknowledged mode is set:
- CRC of header and payload is checked
- if frame reception fails (CRC error): NACK is sent
- if received frame has ACK or NACK flag: unblock nci_spi_send()
Payload is passed to NCI module.
At the end, driver interruption is re asserted.
Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/nfc/nci_core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h index 36df525d2ab3..fc1296db237b 100644 --- a/include/net/nfc/nci_core.h +++ b/include/net/nfc/nci_core.h @@ -242,6 +242,7 @@ struct nci_spi_dev *nci_spi_allocate_device(struct spi_device *spi, 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); +int nci_spi_recv_frame(struct nci_spi_dev *ndev); static inline void nci_spi_set_drvdata(struct nci_spi_dev *ndev, void *data) |