NFC Digital: Add target NFC-DEP support

This adds support for NFC-DEP target mode for NFC-A and NFC-F
technologies.

If the driver provides it, the stack uses an automatic mode for
technology detection and automatic anti-collision. Otherwise the stack
tries to use non-automatic synchronization and listens for SENS_REQ and
SENSF_REQ commands.

The detection, activation, and data exchange procedures work exactly
the same way as in initiator mode, as described in the previous
commits, except that the digital stack waits for commands and sends
responses back to the peer device.

Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 35 insertions, 4 deletions

diff --git a/net/nfc/digital.h b/net/nfc/digital.h
index 5254a872522b..586075a3feed 100644
--- a/net/nfc/digital.h
+++ b/net/nfc/digital.h
@@ -56,8 +56,9 @@ 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);
+                     struct sk_buff *skb, struct digital_tg_mdaa_params *params,
+                     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,
@@ -65,8 +66,8 @@ static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
                                       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);
+        return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout,
+                                cmd_cb, cb_context);
 }
 
 void digital_poll_next_tech(struct nfc_digital_dev *ddev);
@@ -86,6 +87,36 @@ int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
                             struct nfc_target *target, struct sk_buff *skb,
                             struct digital_data_exch *data_exch);
 
+int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
+static inline int digital_tg_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_TG_SEND, skb, NULL, timeout,
+                                cmd_cb, cb_context);
+}
+
+void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
+                              struct sk_buff *resp);
+
+void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
+                               struct sk_buff *resp);
+
+static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
+                                    nfc_digital_cmd_complete_t cb, void *arg)
+{
+        return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL,
+                                timeout, cb, arg);
+}
+
+void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
+                             struct sk_buff *resp);
+
+int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb);
+
+int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech);
+int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech);
+
 typedef u16 (*crc_func_t)(u16, const u8 *, size_t);
 
 #define CRC_A_INIT 0x6363