net/nfc/nci: Support NCI 2.x initial sequence

implement the NCI 2.x initial sequence to support NCI 2.x NFCC.
Since NCI 2.0, CORE_RESET and CORE_INIT sequence have been changed.
If NFCEE supports NCI 2.x, then NCI 2.x initial sequence will work.

In NCI 1.0, Initial sequence and payloads are as below:
(DH)                     (NFCC)
 |  -- CORE_RESET_CMD --> |
 |  <-- CORE_RESET_RSP -- |
 |  -- CORE_INIT_CMD -->  |
 |  <-- CORE_INIT_RSP --  |
 CORE_RESET_RSP payloads are Status, NCI version, Configuration Status.
 CORE_INIT_CMD payloads are empty.
 CORE_INIT_RSP payloads are Status, NFCC Features,
    Number of Supported RF Interfaces, Supported RF Interface,
    Max Logical Connections, Max Routing table Size,
    Max Control Packet Payload Size, Max Size for Large Parameters,
    Manufacturer ID, Manufacturer Specific Information.

In NCI 2.0, Initial Sequence and Parameters are as below:
(DH)                     (NFCC)
 |  -- CORE_RESET_CMD --> |
 |  <-- CORE_RESET_RSP -- |
 |  <-- CORE_RESET_NTF -- |
 |  -- CORE_INIT_CMD -->  |
 |  <-- CORE_INIT_RSP --  |
 CORE_RESET_RSP payloads are Status.
 CORE_RESET_NTF payloads are Reset Trigger,
    Configuration Status, NCI Version, Manufacturer ID,
    Manufacturer Specific Information Length,
    Manufacturer Specific Information.
 CORE_INIT_CMD payloads are Feature1, Feature2.
 CORE_INIT_RSP payloads are Status, NFCC Features,
    Max Logical Connections, Max Routing Table Size,
    Max Control Packet Payload Size,
    Max Data Packet Payload Size of the Static HCI Connection,
    Number of Credits of the Static HCI Connection,
    Max NFC-V RF Frame Size, Number of Supported RF Interfaces,
    Supported RF Interfaces.

Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
Link: https://lore.kernel.org/r/20201202223147.3472-1-bongsu.jeon@samsung.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/include/net/nfc/nci.h b/include/net/nfc/nci.h
index 0550e0380b8d..e82f55f543bb 100644
--- a/include/net/nfc/nci.h
+++ b/include/net/nfc/nci.h
@@ -25,6 +25,8 @@
 #define NCI_MAX_PARAM_LEN					251
 #define NCI_MAX_PAYLOAD_SIZE					255
 #define NCI_MAX_PACKET_SIZE					258
+#define NCI_MAX_LARGE_PARAMS_NCI_v2				15
+#define NCI_VER_2_MASK						0x20
 
 /* NCI Status Codes */
 #define NCI_STATUS_OK						0x00
@@ -131,6 +133,9 @@
 #define NCI_LF_CON_BITR_F_212					0x02
 #define NCI_LF_CON_BITR_F_424					0x04
 
+/* NCI 2.x Feature Enable Bit */
+#define NCI_FEATURE_DISABLE					0x00
+
 /* NCI Reset types */
 #define NCI_RESET_TYPE_KEEP_CONFIG				0x00
 #define NCI_RESET_TYPE_RESET_CONFIG				0x01
@@ -220,6 +225,11 @@ struct nci_core_reset_cmd {
 } __packed;
 
 #define NCI_OP_CORE_INIT_CMD		nci_opcode_pack(NCI_GID_CORE, 0x01)
+/* To support NCI 2.x */
+struct nci_core_init_v2_cmd {
+	u8	feature1;
+	u8	feature2;
+};
 
 #define NCI_OP_CORE_SET_CONFIG_CMD	nci_opcode_pack(NCI_GID_CORE, 0x02)
 struct set_config_param {
@@ -334,6 +344,20 @@ struct nci_core_init_rsp_2 {
 	__le32	manufact_specific_info;
 } __packed;
 
+/* To support NCI ver 2.x */
+struct nci_core_init_rsp_nci_ver2 {
+	u8	status;
+	__le32	nfcc_features;
+	u8	max_logical_connections;
+	__le16	max_routing_table_size;
+	u8	max_ctrl_pkt_payload_len;
+	u8	max_data_pkt_hci_payload_len;
+	u8	number_of_hci_credit;
+	__le16	max_nfc_v_frame_size;
+	u8	num_supported_rf_interfaces;
+	u8	supported_rf_interfaces[];
+} __packed;
+
 #define NCI_OP_CORE_SET_CONFIG_RSP	nci_opcode_pack(NCI_GID_CORE, 0x02)
 struct nci_core_set_config_rsp {
 	__u8	status;
@@ -372,6 +396,16 @@ struct nci_nfcee_discover_rsp {
 /* --------------------------- */
 /* ---- NCI Notifications ---- */
 /* --------------------------- */
+#define NCI_OP_CORE_RESET_NTF		nci_opcode_pack(NCI_GID_CORE, 0x00)
+struct nci_core_reset_ntf {
+	u8	reset_trigger;
+	u8	config_status;
+	u8	nci_ver;
+	u8	manufact_id;
+	u8	manufacturer_specific_len;
+	__le32	manufact_specific_info;
+} __packed;
+
 #define NCI_OP_CORE_CONN_CREDITS_NTF	nci_opcode_pack(NCI_GID_CORE, 0x06)
 struct conn_credit_entry {
 	__u8	conn_id;