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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 /include/net/nfc | |
| parent | 4b10884eb428c243ae2070a539612e645f3d9b93 (diff) | |
| download | linux-59ee2361c9248f07846f7a6e585768dcce18fb16.tar.gz linux-59ee2361c9248f07846f7a6e585768dcce18fb16.tar.bz2 linux-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 'include/net/nfc')
| -rw-r--r-- | include/net/nfc/digital.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/net/nfc/digital.h b/include/net/nfc/digital.h index 8e16b6e0265a..aabd89400d23 100644 --- a/include/net/nfc/digital.h +++ b/include/net/nfc/digital.h @@ -146,6 +146,15 @@ struct nfc_digital_ops { void (*abort_cmd)(struct nfc_digital_dev *ddev); }; +#define NFC_DIGITAL_POLL_MODE_COUNT_MAX 6 /* 106A, 212F, and 424F in & tg */ + +typedef int (*digital_poll_t)(struct nfc_digital_dev *ddev, u8 rf_tech); + +struct digital_poll_tech { + u8 rf_tech; + digital_poll_t poll_func; +}; + /** * Driver capabilities - bit mask made of the following values * @@ -168,6 +177,22 @@ struct nfc_digital_dev { u32 driver_capabilities; void *driver_data; + + struct digital_poll_tech poll_techs[NFC_DIGITAL_POLL_MODE_COUNT_MAX]; + u8 poll_tech_count; + u8 poll_tech_index; + struct mutex poll_lock; + + struct work_struct cmd_work; + struct work_struct cmd_complete_work; + struct list_head cmd_queue; + struct mutex cmd_lock; + + struct work_struct poll_work; + + u8 curr_protocol; + u8 curr_rf_tech; + u8 curr_nfc_dep_pni; }; struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, |