/* * NFC Digital Protocol stack * Copyright (c) 2013, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * */ #define pr_fmt(fmt) "digital: %s: " fmt, __func__ #include "digital.h" #define DIGITAL_CMD_SENS_REQ 0x26 #define DIGITAL_CMD_ALL_REQ 0x52 #define DIGITAL_CMD_SEL_REQ_CL1 0x93 #define DIGITAL_CMD_SEL_REQ_CL2 0x95 #define DIGITAL_CMD_SEL_REQ_CL3 0x97 #define DIGITAL_SDD_REQ_SEL_PAR 0x20 #define DIGITAL_SDD_RES_CT 0x88 #define DIGITAL_SDD_RES_LEN 5 #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) #define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20) #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) #define DIGITAL_MIFARE_READ_RES_LEN 16 #define DIGITAL_MIFARE_ACK_RES 0x0A #define DIGITAL_CMD_SENSB_REQ 0x05 #define DIGITAL_SENSB_ADVANCED BIT(5) #define DIGITAL_SENSB_EXTENDED BIT(4) #define DIGITAL_SENSB_ALLB_REQ BIT(3) #define DIGITAL_SENSB_N(n) ((n) & 0x7) #define DIGITAL_CMD_SENSB_RES 0x50 #define DIGITAL_CMD_ATTRIB_REQ 0x1D #define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6) #define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4) #define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3) #define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2) #define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6) #define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4) #define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8 #define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf) #define DIGITAL_CMD_SENSF_REQ 0x00 #define DIGITAL_CMD_SENSF_RES 0x01 #define DIGITAL_SENSF_RES_MIN_LENGTH 17 #define DIGITAL_SENSF_RES_RD_AP_B1 0x00 #define DIGITAL_SENSF_RES_RD_AP_B2 0x8F #define DIGITAL_SENSF_REQ_RC_NONE 0 #define DIGITAL_SENSF_REQ_RC_SC 1 #define DIGITAL_SENSF_REQ_RC_AP 2 #define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01 #define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1) #define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2) #define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5) #define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0) #define DIGITAL_ISO15693_RES_IS_VALID(flags) \ (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR)) #define DIGITAL_ISO_DEP_I_PCB 0x02 #define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01) #define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0) #define DIGITAL_ISO_DEP_I_BLOCK 0x00 #define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08) static const u8 digital_ats_fsc[] = { 16, 24, 32, 40, 48, 64, 96, 128, }; #define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F) #define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4) #define DIGITAL_ATS_MAX_FSC 256 #define DIGITAL_RATS_BYTE1 0xE0 #define DIGITAL_RATS_PARAM 0x80 struct digital_sdd_res { u8 nfcid1[4]; u8 bcc; } __packed; struct digital_sel_req { u8 sel_cmd; u8 b2; u8 nfcid1[4]; u8 bcc; } __packed; struct digital_sensb_req { u8 cmd; u8 afi; u8 param; } __packed; struct digital_sensb_res { u8 cmd; u8 nfcid0[4]; u8 app_data[4]; u8 proto_info[3]; } __packed; struct digital_attrib_req { u8 cmd; u8 nfcid0[4]; u8 param1; u8 param2; u8 param3; u8 param4; } __packed; struct digital_attrib_res { u8 mbli_did; } __packed; struct digital_sensf_req { u8 cmd; u8 sc1; u8 sc2; u8 rc; u8 tsn; } __packed; struct digital_sensf_res { u8 cmd; u8 nfcid2[8]; u8 pad0[2]; u8 pad1[3]; u8 mrti_check; u8 mrti_update; u8 pad2; u8 rd[2]; } __packed; struct digital_iso15693_inv_req { u8 flags; u8 cmd; u8 mask_len; u64 mask; } __packed; struct digital_iso15693_inv_res { u8 flags; u8 dsfid; u64 uid; } __packed; static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, struct nfc_target *target); int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb) { u8 pcb; u8 block_type; if (skb->len < 1) return -EIO; pcb = *skb->data; block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb); /* No support fo R-block nor S-block */ if (block_type != DIGITAL_ISO_DEP_I_BLOCK) { pr_err("ISO_DEP R-block and S-block not supported\n"); return -EIO; } if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) { pr_err("DID field in ISO_DEP PCB not supported\n"); return -EIO; } skb_pull(skb, 1); return 0; } int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, struct sk_buff *skb) { /* * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must * not be greater than remote FSC */ if (skb->len + 3 > ddev->target_fsc) return -EIO; skb_push(skb, 1); *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni; ddev->curr_nfc_dep_pni = DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1); return 0; } static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = arg; u8 fsdi; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len < 2) { rc = -EIO; goto exit; } fsdi = DIGITAL_ATS_FSCI(resp->data[1]); if (fsdi >= 8) ddev->target_fsc = DIGITAL_ATS_MAX_FSC; else ddev->target_fsc = digital_ats_fsc[fsdi]; ddev->curr_nfc_dep_pni = 0; rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443); exit: dev_kfree_skb(resp); kfree(target); if (rc) digital_poll_next_tech(ddev); } static int digital_in_send_rats(struct nfc_digital_dev *ddev, struct nfc_target *target) { int rc; struct sk_buff *skb; skb = digital_skb_alloc(ddev, 2); if (!skb) return -ENOMEM; *skb_put(skb, 1) = DIGITAL_RATS_BYTE1; *skb_put(skb, 1) = DIGITAL_RATS_PARAM; rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats, target); if (rc) kfree_skb(skb); return rc; } static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = arg; int rc; u8 sel_res; u8 nfc_proto; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { rc = digital_skb_check_crc_a(resp); if (rc) { PROTOCOL_ERR("4.4.1.3"); goto exit; } } if (!resp->len) { rc = -EIO; goto exit; } sel_res = resp->data[0]; if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) { rc = digital_in_send_sdd_req(ddev, target); if (rc) goto exit; goto exit_free_skb; } target->sel_res = sel_res; if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { nfc_proto = NFC_PROTO_MIFARE; } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { nfc_proto = NFC_PROTO_NFC_DEP; } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) { rc = digital_in_send_rats(ddev, target); if (rc) goto exit; /* * Skip target_found and don't free it for now. This will be * done when receiving the ATS */ goto exit_free_skb; } else { rc = -EOPNOTSUPP; goto exit; } rc = digital_target_found(ddev, target, nfc_proto); exit: kfree(target); exit_free_skb: dev_kfree_skb(resp); if (rc) digital_poll_next_tech(ddev); } static int digital_in_send_sel_req(struct nfc_digital_dev *ddev, struct nfc_target *target, struct digital_sdd_res *sdd_res) { struct sk_buff *skb; struct digital_sel_req *sel_req; u8 sel_cmd; int rc; skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req)); if (!skb) return -ENOMEM; skb_put(skb, sizeof(struct digital_sel_req)); sel_req = (struct digital_sel_req *)skb->data; if (target->nfcid1_len <= 4) sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; else if (target->nfcid1_len < 10) sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; else sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; sel_req->sel_cmd = sel_cmd; sel_req->b2 = 0x70; memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4); sel_req->bcc = sdd_res->bcc; if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); if (rc) goto exit; } else { digital_skb_add_crc_a(skb); } rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res, target); exit: if (rc) kfree_skb(skb); return rc; } static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = arg; struct digital_sdd_res *sdd_res; int rc; u8 offset, size; u8 i, bcc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len < DIGITAL_SDD_RES_LEN) { PROTOCOL_ERR("4.7.2.8"); rc = -EINVAL; goto exit; } sdd_res = (struct digital_sdd_res *)resp->data; for (i = 0, bcc = 0; i < 4; i++) bcc ^= sdd_res->nfcid1[i]; if (bcc != sdd_res->bcc) { PROTOCOL_ERR("4.7.2.6"); rc = -EINVAL; goto exit; } if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) { offset = 1; size = 3; } else { offset = 0; size = 4; } memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset, size); target->nfcid1_len += size; rc = digital_in_send_sel_req(ddev, target, sdd_res); exit: dev_kfree_skb(resp); if (rc) { kfree(target); digital_poll_next_tech(ddev); } } static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, struct nfc_target *target) { int rc; struct sk_buff *skb; u8 sel_cmd; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_STANDARD); if (rc) return rc; skb = digital_skb_alloc(ddev, 2); if (!skb) return -ENOMEM; if (target->nfcid1_len == 0) sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; else if (target->nfcid1_len == 3) sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; else sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; *skb_put(skb, sizeof(u8)) = sel_cmd; *skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR; return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, target); } static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = NULL; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len < sizeof(u16)) { rc = -EIO; goto exit; } target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); if (!target) { rc = -ENOMEM; goto exit; } target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { PROTOCOL_ERR("4.6.3.3"); rc = -EINVAL; goto exit; } if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); else rc = digital_in_send_sdd_req(ddev, target); exit: dev_kfree_skb(resp); if (rc) { kfree(target); digital_poll_next_tech(ddev); } } int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) { struct sk_buff *skb; int rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, NFC_DIGITAL_RF_TECH_106A); if (rc) return rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_SHORT); if (rc) return rc; skb = digital_skb_alloc(ddev, 1); if (!skb) return -ENOMEM; *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ; rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); if (rc) kfree_skb(skb); return rc; } int digital_in_recv_mifare_res(struct sk_buff *resp) { /* Successful READ command response is 16 data bytes + 2 CRC bytes long. * Since the driver can't differentiate a ACK/NACK response from a valid * READ response, the CRC calculation must be handled at digital level * even if the driver supports it for this technology. */ if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { if (digital_skb_check_crc_a(resp)) { PROTOCOL_ERR("9.4.1.2"); return -EIO; } return 0; } /* ACK response (i.e. successful WRITE). */ if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { resp->data[0] = 0; return 0; } /* NACK and any other responses are treated as error. */ return -EIO; } static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = arg; struct digital_attrib_res *attrib_res; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len < sizeof(*attrib_res)) { PROTOCOL_ERR("12.6.2"); rc = -EIO; goto exit; } attrib_res = (struct digital_attrib_res *)resp->data; if (attrib_res->mbli_did & 0x0f) { PROTOCOL_ERR("12.6.2.1"); rc = -EIO; goto exit; } rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B); exit: dev_kfree_skb(resp); kfree(target); if (rc) digital_poll_next_tech(ddev); } static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev, struct nfc_target *target, struct digital_sensb_res *sensb_res) { struct digital_attrib_req *attrib_req; struct sk_buff *skb; int rc; skb = digital_skb_alloc(ddev, sizeof(*attrib_req)); if (!skb) return -ENOMEM; attrib_req = (struct digital_attrib_req *)skb_put(skb, sizeof(*attrib_req)); attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ; memcpy(attrib_req->nfcid0, sensb_res->nfcid0, sizeof(attrib_req->nfcid0)); attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT | DIGITAL_ATTRIB_P1_TR1_DEFAULT; attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 | DIGITAL_ATTRIB_P2_POLL_LISTEN_1 | DIGITAL_ATTRIB_P2_MAX_FRAME_256; attrib_req->param3 = sensb_res->proto_info[1] & 0x07; attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0); rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res, target); if (rc) kfree_skb(skb); return rc; } static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct nfc_target *target = NULL; struct digital_sensb_res *sensb_res; u8 fsci; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len != sizeof(*sensb_res)) { PROTOCOL_ERR("5.6.2.1"); rc = -EIO; goto exit; } sensb_res = (struct digital_sensb_res *)resp->data; if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) { PROTOCOL_ERR("5.6.2"); rc = -EIO; goto exit; } if (!(sensb_res->proto_info[1] & BIT(0))) { PROTOCOL_ERR("5.6.2.12"); rc = -EIO; goto exit; } if (sensb_res->proto_info[1] & BIT(3)) { PROTOCOL_ERR("5.6.2.16"); rc = -EIO; goto exit; } fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]); if (fsci >= 8) ddev->target_fsc = DIGITAL_ATS_MAX_FSC; else ddev->target_fsc = digital_ats_fsc[fsci]; target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); if (!target) { rc = -ENOMEM; goto exit; } rc = digital_in_send_attrib_req(ddev, target, sensb_res); exit: dev_kfree_skb(resp); if (rc) { kfree(target); digital_poll_next_tech(ddev); } } int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech) { struct digital_sensb_req *sensb_req; struct sk_buff *skb; int rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, NFC_DIGITAL_RF_TECH_106B); if (rc) return rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCB); if (rc) return rc; skb = digital_skb_alloc(ddev, sizeof(*sensb_req)); if (!skb) return -ENOMEM; sensb_req = (struct digital_sensb_req *)skb_put(skb, sizeof(*sensb_req)); sensb_req->cmd = DIGITAL_CMD_SENSB_REQ; sensb_req->afi = 0x00; /* All families and sub-families */ sensb_req->param = DIGITAL_SENSB_N(0); rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res, NULL); if (rc) kfree_skb(skb); return rc; } static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { int rc; u8 proto; struct nfc_target target; struct digital_sensf_res *sensf_res; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { rc = -EIO; goto exit; } if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { rc = digital_skb_check_crc_f(resp); if (rc) { PROTOCOL_ERR("6.4.1.8"); goto exit; } } skb_pull(resp, 1); memset(&target, 0, sizeof(struct nfc_target)); sensf_res = (struct digital_sensf_res *)resp->data; memcpy(target.sensf_res, sensf_res, resp->len); target.sensf_res_len = resp->len; memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); target.nfcid2_len = NFC_NFCID2_MAXSIZE; if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) proto = NFC_PROTO_NFC_DEP; else proto = NFC_PROTO_FELICA; rc = digital_target_found(ddev, &target, proto); exit: dev_kfree_skb(resp); if (rc) digital_poll_next_tech(ddev); } int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) { struct digital_sensf_req *sensf_req; struct sk_buff *skb; int rc; u8 size; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); if (rc) return rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCF); if (rc) return rc; size = sizeof(struct digital_sensf_req); skb = digital_skb_alloc(ddev, size); if (!skb) return -ENOMEM; skb_put(skb, size); sensf_req = (struct digital_sensf_req *)skb->data; sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; sensf_req->sc1 = 0xFF; sensf_req->sc2 = 0xFF; sensf_req->rc = 0; sensf_req->tsn = 0; *skb_push(skb, 1) = size + 1; if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) digital_skb_add_crc_f(skb); rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, NULL); if (rc) kfree_skb(skb); return rc; } static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct digital_iso15693_inv_res *res; struct nfc_target *target = NULL; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto out_free_skb; } if (resp->len != sizeof(*res)) { rc = -EIO; goto out_free_skb; } res = (struct digital_iso15693_inv_res *)resp->data; if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) { PROTOCOL_ERR("ISO15693 - 10.3.1"); rc = -EINVAL; goto out_free_skb; } target = kzalloc(sizeof(*target), GFP_KERNEL); if (!target) { rc = -ENOMEM; goto out_free_skb; } target->is_iso15693 = 1; target->iso15693_dsfid = res->dsfid; memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid)); rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693); kfree(target); out_free_skb: dev_kfree_skb(resp); if (rc) digital_poll_next_tech(ddev); } int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech) { struct digital_iso15693_inv_req *req; struct sk_buff *skb; int rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, NFC_DIGITAL_RF_TECH_ISO15693); if (rc) return rc; rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_ISO15693_INVENTORY); if (rc) return rc; skb = digital_skb_alloc(ddev, sizeof(*req)); if (!skb) return -ENOMEM; skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */ req = (struct digital_iso15693_inv_req *)skb->data; /* Single sub-carrier, high data rate, no AFI, single slot * Inventory command */ req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE | DIGITAL_ISO15693_REQ_FLAG_INVENTORY | DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS; req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ; req->mask_len = 0; rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_iso15693_inv_res, NULL); if (rc) kfree_skb(skb); return rc; } static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) { struct sk_buff *skb; int rc; skb = digital_skb_alloc(ddev, 1); if (!skb) return -ENOMEM; *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP; if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) digital_skb_add_crc_a(skb); rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE); if (rc) { kfree_skb(skb); return rc; } rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, NULL); if (rc) kfree_skb(skb); return rc; } static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { rc = digital_skb_check_crc_a(resp); if (rc) { PROTOCOL_ERR("4.4.1.3"); goto exit; } } /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ rc = digital_tg_send_sel_res(ddev); exit: if (rc) digital_poll_next_tech(ddev); dev_kfree_skb(resp); } static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) { struct sk_buff *skb; struct digital_sdd_res *sdd_res; int rc, i; skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); if (!skb) return -ENOMEM; skb_put(skb, sizeof(struct digital_sdd_res)); sdd_res = (struct digital_sdd_res *)skb->data; sdd_res->nfcid1[0] = 0x08; get_random_bytes(sdd_res->nfcid1 + 1, 3); sdd_res->bcc = 0; for (i = 0; i < 4; i++) sdd_res->bcc ^= sdd_res->nfcid1[i]; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); if (rc) { kfree_skb(skb); return rc; } rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, NULL); if (rc) kfree_skb(skb); return rc; } static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { u8 *sdd_req; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } sdd_req = resp->data; if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { rc = -EINVAL; goto exit; } rc = digital_tg_send_sdd_res(ddev); exit: if (rc) digital_poll_next_tech(ddev); dev_kfree_skb(resp); } static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) { struct sk_buff *skb; u8 *sens_res; int rc; skb = digital_skb_alloc(ddev, 2); if (!skb) return -ENOMEM; sens_res = skb_put(skb, 2); sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_STANDARD); if (rc) { kfree_skb(skb); return rc; } rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, NULL); if (rc) kfree_skb(skb); return rc; } void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { u8 sens_req; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } sens_req = resp->data[0]; if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && sens_req != DIGITAL_CMD_ALL_REQ)) { rc = -EINVAL; goto exit; } rc = digital_tg_send_sens_res(ddev); exit: if (rc) digital_poll_next_tech(ddev); dev_kfree_skb(resp); } static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { if (!IS_ERR(resp) && (resp->len >= 2) && (resp->data[1] == DIGITAL_CMD_SENSF_REQ)) digital_tg_recv_sensf_req(ddev, arg, resp); else digital_tg_recv_atr_req(ddev, arg, resp); return; } static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, struct digital_sensf_req *sensf_req) { struct sk_buff *skb; u8 size; int rc; struct digital_sensf_res *sensf_res; size = sizeof(struct digital_sensf_res); if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE) size -= sizeof(sensf_res->rd); skb = digital_skb_alloc(ddev, size); if (!skb) return -ENOMEM; skb_put(skb, size); sensf_res = (struct digital_sensf_res *)skb->data; memset(sensf_res, 0, size); sensf_res->cmd = DIGITAL_CMD_SENSF_RES; sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; get_random_bytes(&sensf_res->nfcid2[2], 6); switch (sensf_req->rc) { case DIGITAL_SENSF_REQ_RC_SC: sensf_res->rd[0] = sensf_req->sc1; sensf_res->rd[1] = sensf_req->sc2; break; case DIGITAL_SENSF_REQ_RC_AP: sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; break; } *skb_push(skb, sizeof(u8)) = size + 1; if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) digital_skb_add_crc_f(skb); rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_or_sensf_req, NULL); if (rc) kfree_skb(skb); return rc; } void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { struct digital_sensf_req *sensf_req; int rc; if (IS_ERR(resp)) { rc = PTR_ERR(resp); resp = NULL; goto exit; } if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { rc = digital_skb_check_crc_f(resp); if (rc) { PROTOCOL_ERR("6.4.1.8"); goto exit; } } if (resp->len != sizeof(struct digital_sensf_req) + 1) { rc = -EINVAL; goto exit; } skb_pull(resp, 1); sensf_req = (struct digital_sensf_req *)resp->data; if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { rc = -EINVAL; goto exit; } rc = digital_tg_send_sensf_res(ddev, sensf_req); exit: if (rc) digital_poll_next_tech(ddev); dev_kfree_skb(resp); } int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) { int rc; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); if (rc) return rc; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); if (rc) return rc; return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); } int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) { int rc; u8 *nfcid2; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); if (rc) return rc; rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); if (rc) return rc; nfcid2 = kzalloc(NFC_NFCID2_MAXSIZE, GFP_KERNEL); if (!nfcid2) return -ENOMEM; nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; get_random_bytes(nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2); }