NFC: st21nfca: 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 as
  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_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.

Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>

drivers/nfc/st21nfca/Makefile

@@ -2,7 +2,7 @@
 # Makefile for ST21NFCA HCI based NFC driver
 #
 
-st21nfca_hci-objs = core.o dep.o se.o
+st21nfca_hci-objs = core.o dep.o se.o vendor_cmds.o
 obj-$(CONFIG_NFC_ST21NFCA)     += st21nfca_hci.o
 
 st21nfca_i2c-objs  = i2c.o

drivers/nfc/st21nfca/core.c

@@ -923,6 +923,8 @@ static int st21nfca_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe,
 							event, skb);
 	case ST21NFCA_APDU_READER_GATE:
 		return st21nfca_apdu_reader_event_received(hdev, event, skb);
+	case NFC_HCI_LOOPBACK_GATE:
+		return st21nfca_hci_loopback_event_received(hdev, event, skb);
 	default:
 		return 1;
 	}
@@ -1024,6 +1026,7 @@ int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
 	*hdev = info->hdev;
 	st21nfca_dep_init(info->hdev);
 	st21nfca_se_init(info->hdev);
+	st21nfca_vendor_cmds_init(info->hdev);
 
 	return 0;
 

drivers/nfc/st21nfca/se.c

@@ -167,6 +167,9 @@ int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev)
 	struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
 	int se_count = 0;
 
+	if (test_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks))
+		return 0;
+
 	if (info->se_status->is_uicc_present) {
 		nfc_add_se(hdev->ndev, NFC_HCI_UICC_HOST_ID, NFC_SE_UICC);
 		se_count++;
@@ -191,7 +194,6 @@ int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx)
 	 * Same for eSE.
 	 */
 	r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_ON);
-
 	if (r == ST21NFCA_ESE_HOST_ID) {
 		st21nfca_se_get_atr(hdev);
 		r = nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE,

drivers/nfc/st21nfca/st21nfca.h

@@ -66,6 +66,9 @@
 #define ST21NFCA_HCI_MODE		0
 #define ST21NFCA_NUM_DEVICES		256
 
+#define ST21NFCA_VENDOR_OUI		0x0080E1 /* STMicroelectronics */
+#define ST21NFCA_FACTORY_MODE		2
+
 struct st21nfca_se_status {
 	bool is_ese_present;
 	bool is_uicc_present;
@@ -76,6 +79,50 @@ enum st21nfca_state {
 	ST21NFCA_ST_READY,
 };
 
+/**
+ * enum nfc_vendor_cmds - supported nfc vendor commands
+ *
+ * @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 as 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_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.
+ */
+enum nfc_vendor_cmds {
+	FACTORY_MODE,
+	HCI_CLEAR_ALL_PIPES,
+	HCI_DM_PUT_DATA,
+	HCI_DM_UPDATE_AID,
+	HCI_DM_GET_INFO,
+	HCI_DM_GET_DATA,
+	HCI_DM_LOAD,
+	HCI_DM_RESET,
+	HCI_GET_PARAM,
+	HCI_DM_FIELD_GENERATOR,
+	HCI_LOOPBACK,
+};
+
+struct st21nfca_vendor_info {
+	struct completion req_completion;
+	struct sk_buff *rx_skb;
+};
+
 struct st21nfca_dep_info {
 	struct sk_buff *tx_pending;
 	struct work_struct tx_work;
@@ -124,12 +171,13 @@ struct st21nfca_hci_info {
 
 	struct st21nfca_dep_info dep_info;
 	struct st21nfca_se_info se_info;
+	struct st21nfca_vendor_info vendor_info;
 };
 
 int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
 		       char *llc_name, int phy_headroom, int phy_tailroom,
 		       int phy_payload, struct nfc_hci_dev **hdev,
-			   struct st21nfca_se_status *se_status);
+		       struct st21nfca_se_status *se_status);
 void st21nfca_hci_remove(struct nfc_hci_dev *hdev);
 
 int st21nfca_dep_event_received(struct nfc_hci_dev *hdev,
@@ -156,4 +204,8 @@ int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx,
 void st21nfca_se_init(struct nfc_hci_dev *hdev);
 void st21nfca_se_deinit(struct nfc_hci_dev *hdev);
 
+int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *ndev, u8 event,
+					 struct sk_buff *skb);
+int st21nfca_vendor_cmds_init(struct nfc_hci_dev *ndev);
+
 #endif /* __LOCAL_ST21NFCA_H_ */