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authorThierry Escande <thierry.escande@linux.intel.com>2013-09-19 17:55:26 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2013-09-25 02:02:07 +0200
commit59ee2361c9248f07846f7a6e585768dcce18fb16 (patch)
tree05cb3823442a74481dbec0a7e34e002c12dff53e /net/nfc/digital.h
parent4b10884eb428c243ae2070a539612e645f3d9b93 (diff)
downloadop-kernel-dev-59ee2361c9248f07846f7a6e585768dcce18fb16.zip
op-kernel-dev-59ee2361c9248f07846f7a6e585768dcce18fb16.tar.gz
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.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/net/nfc/digital.h b/net/nfc/digital.h
index 8d91ed8..0a27670 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 */
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