NFC: st-nci: Add support for proprietary commands

Add support for proprietary commands useful mainly for
factory testings. Here is a list:

- FACTORY_MODE: Allow to set the driver into a mode where
  no secure element are activated. It does not consider any
  NFC_ATTR_VENDOR_DATA.
- HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes
  command. It does not consider any NFC_ATTR_VENDOR_DATA.
- HCI_DM_PUT_DATA: Allow to configure specific CLF registry
  like for example RF trimmings or low level drivers
  configurations (I2C, SPI, SWP).
- HCI_DM_UPDATE_AID: Allow to configure an AID routing into the
  CLF routing table following RF technology, CLF mode or protocol.
- HCI_DM_GET_INFO: Allow to retrieve CLF information.
- HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as
  low level drivers configurations or RF trimmings.
- HCI_DM_DIRECT_LOAD: Allow to load a firmware into the CLF.
  A complete packet can be more than 8KB.
- HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
  configuration changes without CLF power off.
- HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example
  the white list).
- HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
  technology. When using this command to anti-collision is done.
- HCI_LOOPBACK: Allow to echo a command and test the Dh to CLF
  connectivity.
- HCI_DM_VDC_MEASUREMENT_VALUE: Allow to measure the field applied
  on the CLF antenna. A value between 0 and 0x0f is returned. 0 is
  maximum.
- HCI_DM_FWUPD_START: Allow to put CLF into firmware update mode.
  It is a specific CLF command as there is no GPIO for this.
- HCI_DM_FWUPD_END:  Allow to complete firmware update.
- HCI_DM_VDC_VALUE_COMPARISON: Allow to compare the field applied
  on the CLF antenna to a reference value.
- MANUFACTURER_SPECIFIC: Allow to retrieve manufacturer specific data
  received during a NCI_CORE_INIT_CMD.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/st-nci/se.c

@@ -39,7 +39,6 @@ struct st_nci_pipe_info {
 #define ST_NCI_ESE_HOST_ID            0xc0
 
 /* Gates */
-#define ST_NCI_DEVICE_MGNT_GATE       0x01
 #define ST_NCI_APDU_READER_GATE       0xf0
 #define ST_NCI_CONNECTIVITY_GATE      0x41
 
@@ -114,6 +113,8 @@ static struct nci_hci_gate st_nci_gates[] = {
 
 	{NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE,
 					ST_NCI_HOST_CONTROLLER_ID},
+	{NCI_HCI_LOOPBACK_GATE, NCI_HCI_INVALID_PIPE,
+					ST_NCI_HOST_CONTROLLER_ID},
 
 	/* Secure element pipes are created by secure element host */
 	{ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
@@ -376,8 +377,10 @@ void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
 		st_nci_hci_apdu_reader_event_received(ndev, event, skb);
 	break;
 	case ST_NCI_CONNECTIVITY_GATE:
-		st_nci_hci_connectivity_event_received(ndev, host, event,
-							 skb);
+		st_nci_hci_connectivity_event_received(ndev, host, event, skb);
+	break;
+	case NCI_HCI_LOOPBACK_GATE:
+		st_nci_hci_loopback_event_received(ndev, event, skb);
 	break;
 	}
 }
@@ -509,6 +512,7 @@ EXPORT_SYMBOL_GPL(st_nci_enable_se);
 
 static int st_nci_hci_network_init(struct nci_dev *ndev)
 {
+	struct st_nci_info *info = nci_get_drvdata(ndev);
 	struct core_conn_create_dest_spec_params *dest_params;
 	struct dest_spec_params spec_params;
 	struct nci_conn_info    *conn_info;
@@ -561,10 +565,17 @@ static int st_nci_hci_network_init(struct nci_dev *ndev)
 	if (r != NCI_HCI_ANY_OK)
 		goto free_dest_params;
 
-	r = nci_nfcee_mode_set(ndev, ndev->hci_dev->conn_info->id,
-			       NCI_NFCEE_ENABLE);
-	if (r != NCI_STATUS_OK)
-		goto free_dest_params;
+	/*
+	 * In factory mode, we prevent secure elements activation
+	 * by disabling nfcee on the current HCI connection id.
+	 * HCI will be used here only for proprietary commands.
+	 */
+	if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
+		r = nci_nfcee_mode_set(ndev, ndev->hci_dev->conn_info->id,
+				       NCI_NFCEE_DISABLE);
+	else
+		r = nci_nfcee_mode_set(ndev, ndev->hci_dev->conn_info->id,
+				       NCI_NFCEE_ENABLE);
 
 free_dest_params:
 	kfree(dest_params);
@@ -578,6 +589,7 @@ int st_nci_discover_se(struct nci_dev *ndev)
 	u8 param[2];
 	int r;
 	int se_count = 0;
+	struct st_nci_info *info = nci_get_drvdata(ndev);
 
 	pr_debug("st_nci_discover_se\n");
 
@@ -585,6 +597,9 @@ int st_nci_discover_se(struct nci_dev *ndev)
 	if (r != 0)
 		return r;
 
+	if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
+		return 0;
+
 	param[0] = ST_NCI_UICC_HOST_ID;
 	param[1] = ST_NCI_HCI_HOST_ID_ESE;
 	r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,