Add a 20-byte field ats to struct nfc_target and expose it as NFC_ATTR_TARGET_ATS via the netlink interface. The payload contains 'historical bytes' that help to distinguish cards from one another. The information is commonly used to assemble an emulated ATR similar to that reported by smart cards with contacts. Add a 20-byte field target_ats to struct nci_dev to hold the payload obtained in nci_rf_intf_activated_ntf_packet() and copy it to over to nfc_target.ats in nci_activate_target(). The approach is similar to the handling of 'general bytes' within ATR_RES. Replace the hard-coded size of rats_res within struct activation_params_nfca_poll_iso_dep by the equal constant NFC_ATS_MAXSIZE now defined in nfc.h Within NCI, the information corresponds to the 'RATS Response' activation parameter that omits the initial length byte TL. This loses no information and is consistent with our handling of SENSB_RES that also drops the first (constant) byte. Tested with nxp_nci_i2c on a few type A targets including an ICAO 9303 compliant passport. I refrain from the corresponding change to digital_in_recv_ats() to have the few drivers based on digital.h fill nfc_target.ats, as I have no way to test it. That class of drivers appear not to set NFC_ATTR_TARGET_SENSB_RES either. Consider a separate patch to propagate (all) the parameters.
Showing the changes to include/uapi (1 of 7 files). Show all
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| @@ -164,6 +164,7 @@ enum nfc_commands { · 163 unmodified lines | |||
| 164 | * @NFC_ATTR_VENDOR_SUBCMD: Vendor specific sub command | 164 | * @NFC_ATTR_VENDOR_SUBCMD: Vendor specific sub command |
| 165 | * @NFC_ATTR_VENDOR_DATA: Vendor specific data, to be optionally passed | 165 | * @NFC_ATTR_VENDOR_DATA: Vendor specific data, to be optionally passed |
| 166 | * to a vendor specific command implementation | 166 | * to a vendor specific command implementation |
| 167 | * @NFC_ATTR_TARGET_ATS: ISO 14443 type A target Answer To Select | ||
| 167 | */ | 168 | */ |
| 168 | enum nfc_attrs { | 169 | enum nfc_attrs { |
| 169 | NFC_ATTR_UNSPEC, | 170 | NFC_ATTR_UNSPEC, |
| @@ -198,6 +199,7 @@ enum nfc_attrs { · 28 unmodified lines | |||
| 198 | NFC_ATTR_VENDOR_ID, | 199 | NFC_ATTR_VENDOR_ID, |
| 199 | NFC_ATTR_VENDOR_SUBCMD, | 200 | NFC_ATTR_VENDOR_SUBCMD, |
| 200 | NFC_ATTR_VENDOR_DATA, | 201 | NFC_ATTR_VENDOR_DATA, |
| 202 | NFC_ATTR_TARGET_ATS, | ||
| 201 | /* private: internal use only */ | 203 | /* private: internal use only */ |
| 202 | __NFC_ATTR_AFTER_LAST | 204 | __NFC_ATTR_AFTER_LAST |
| 203 | }; | 205 | }; |
| @@ -225,6 +227,7 @@ enum nfc_sdp_attr { · 21 unmodified lines | |||
| 225 | #define NFC_GB_MAXSIZE 48 | 227 | #define NFC_GB_MAXSIZE 48 |
| 226 | #define NFC_FIRMWARE_NAME_MAXSIZE 32 | 228 | #define NFC_FIRMWARE_NAME_MAXSIZE 32 |
| 227 | #define NFC_ISO15693_UID_MAXSIZE 8 | 229 | #define NFC_ISO15693_UID_MAXSIZE 8 |
| 230 | #define NFC_ATS_MAXSIZE 20 | ||
| 228 | 231 | ||
| 229 | /* NFC protocols */ | 232 | /* NFC protocols */ |
| 230 | #define NFC_PROTO_JEWEL 1 | 233 | #define NFC_PROTO_JEWEL 1 |