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| author | Thierry Escande <thierry.escande@linux.intel.com> | 2013-09-19 17:55:26 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-09-25 02:02:07 +0200 |
| commit | 59ee2361c9248f07846f7a6e585768dcce18fb16 (patch) | |
| tree | 05cb3823442a74481dbec0a7e34e002c12dff53e /net/nfc/digital.h | |
| parent | 4b10884eb428c243ae2070a539612e645f3d9b93 (diff) | |
| download | linux-stable-59ee2361c9248f07846f7a6e585768dcce18fb16.tar.gz linux-stable-59ee2361c9248f07846f7a6e585768dcce18fb16.tar.bz2 linux-stable-59ee2361c9248f07846f7a6e585768dcce18fb16.zip | |
NFC Digital: Implement driver commands mechanism
This implements the mechanism used to send commands to the driver in
initiator mode through in_send_cmd().
Commands are serialized and sent to the driver by using a work item
on the system workqueue. Responses are handled asynchronously by
another work item. Once the digital stack receives the response through
the command_complete callback, the next command is sent to the driver.
This also implements the polling mechanism. It's handled by a work item
cycling on all supported protocols. The start poll command for a given
protocol is sent to the driver using the mechanism described above.
The process continues until a peer is discovered or stop_poll is
called. This patch implements the poll function for NFC-A that sends a
SENS_REQ command and waits for the SENS_RES response.
Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc/digital.h')
| -rw-r--r-- | net/nfc/digital.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/net/nfc/digital.h b/net/nfc/digital.h index 8d91ed820912..0a2767098daa 100644 --- a/net/nfc/digital.h +++ b/net/nfc/digital.h @@ -24,4 +24,33 @@ #define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \ __func__, __LINE__, req) +#define DIGITAL_CMD_IN_SEND 0 +#define DIGITAL_CMD_TG_SEND 1 +#define DIGITAL_CMD_TG_LISTEN 2 +#define DIGITAL_CMD_TG_LISTEN_MDAA 3 + +#define DIGITAL_MAX_HEADER_LEN 7 +#define DIGITAL_CRC_LEN 2 + +struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev, + unsigned int len); + +int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type, + struct sk_buff *skb, u16 timeout, + nfc_digital_cmd_complete_t cmd_cb, void *cb_context); + +int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param); +static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev, + struct sk_buff *skb, u16 timeout, + nfc_digital_cmd_complete_t cmd_cb, + void *cb_context) +{ + return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb, + cb_context); +} + +void digital_poll_next_tech(struct nfc_digital_dev *ddev); + +int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech); + #endif /* __DIGITAL_H */ |