| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Christophe Ricard | 4147 | 99.33% | 23 | 85.19% |
| Johannes Berg | 12 | 0.29% | 1 | 3.70% |
| Christophe Jaillet | 10 | 0.24% | 1 | 3.70% |
| Pan Bian | 4 | 0.10% | 1 | 3.70% |
| Thomas Gleixner | 2 | 0.05% | 1 | 3.70% |
| Total | 4175 | 27 |
// SPDX-License-Identifier: GPL-2.0-only /* * HCI based Driver for STMicroelectronics NFC Chip * * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved. */ #include <linux/module.h> #include <linux/nfc.h> #include <net/nfc/hci.h> #include <net/nfc/llc.h> #include "st21nfca.h" #define DRIVER_DESC "HCI NFC driver for ST21NFCA" #define FULL_VERSION_LEN 3 /* Proprietary gates, events, commands and registers */ /* Commands that apply to all RF readers */ #define ST21NFCA_RF_READER_CMD_PRESENCE_CHECK 0x30 #define ST21NFCA_RF_READER_ISO15693_GATE 0x12 #define ST21NFCA_RF_READER_ISO15693_INVENTORY 0x01 /* * Reader gate for communication with contact-less cards using Type A * protocol ISO14443-3 but not compliant with ISO14443-4 */ #define ST21NFCA_RF_READER_14443_3_A_GATE 0x15 #define ST21NFCA_RF_READER_14443_3_A_UID 0x02 #define ST21NFCA_RF_READER_14443_3_A_ATQA 0x03 #define ST21NFCA_RF_READER_14443_3_A_SAK 0x04 #define ST21NFCA_RF_READER_F_DATARATE 0x01 #define ST21NFCA_RF_READER_F_DATARATE_106 0x01 #define ST21NFCA_RF_READER_F_DATARATE_212 0x02 #define ST21NFCA_RF_READER_F_DATARATE_424 0x04 #define ST21NFCA_RF_READER_F_POL_REQ 0x02 #define ST21NFCA_RF_READER_F_POL_REQ_DEFAULT 0xffff0000 #define ST21NFCA_RF_READER_F_NFCID2 0x03 #define ST21NFCA_RF_READER_F_NFCID1 0x04 #define ST21NFCA_RF_CARD_F_MODE 0x01 #define ST21NFCA_RF_CARD_F_NFCID2_LIST 0x04 #define ST21NFCA_RF_CARD_F_NFCID1 0x05 #define ST21NFCA_RF_CARD_F_SENS_RES 0x06 #define ST21NFCA_RF_CARD_F_SEL_RES 0x07 #define ST21NFCA_RF_CARD_F_DATARATE 0x08 #define ST21NFCA_RF_CARD_F_DATARATE_212_424 0x01 #define ST21NFCA_DEVICE_MGNT_PIPE 0x02 #define ST21NFCA_DM_GETINFO 0x13 #define ST21NFCA_DM_GETINFO_PIPE_LIST 0x02 #define ST21NFCA_DM_GETINFO_PIPE_INFO 0x01 #define ST21NFCA_DM_PIPE_CREATED 0x02 #define ST21NFCA_DM_PIPE_OPEN 0x04 #define ST21NFCA_DM_RF_ACTIVE 0x80 #define ST21NFCA_DM_DISCONNECT 0x30 #define ST21NFCA_DM_IS_PIPE_OPEN(p) \ ((p & 0x0f) == (ST21NFCA_DM_PIPE_CREATED | ST21NFCA_DM_PIPE_OPEN)) #define ST21NFCA_NFC_MODE 0x03 /* NFC_MODE parameter*/ #define ST21NFCA_EVT_HOT_PLUG 0x03 #define ST21NFCA_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80) #define ST21NFCA_SE_TO_PIPES 2000 static DECLARE_BITMAP(dev_mask, ST21NFCA_NUM_DEVICES); static struct nfc_hci_gate st21nfca_gates[] = { {NFC_HCI_ADMIN_GATE, NFC_HCI_ADMIN_PIPE}, {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_LINK_MGMT_PIPE}, {ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DEVICE_MGNT_PIPE}, {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE}, {ST21NFCA_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE}, {ST21NFCA_RF_READER_14443_3_A_GATE, NFC_HCI_INVALID_PIPE}, {ST21NFCA_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE}, {ST21NFCA_RF_CARD_F_GATE, NFC_HCI_INVALID_PIPE}, /* Secure element pipes are created by secure element host */ {ST21NFCA_CONNECTIVITY_GATE, NFC_HCI_DO_NOT_CREATE_PIPE}, {ST21NFCA_APDU_READER_GATE, NFC_HCI_DO_NOT_CREATE_PIPE}, }; struct st21nfca_pipe_info { u8 pipe_state; u8 src_host_id; u8 src_gate_id; u8 dst_host_id; u8 dst_gate_id; } __packed; /* Largest headroom needed for outgoing custom commands */ #define ST21NFCA_CMDS_HEADROOM 7 static int st21nfca_hci_load_session(struct nfc_hci_dev *hdev) { int i, j, r; struct sk_buff *skb_pipe_list, *skb_pipe_info; struct st21nfca_pipe_info *info; u8 pipe_list[] = { ST21NFCA_DM_GETINFO_PIPE_LIST, NFC_HCI_TERMINAL_HOST_ID }; u8 pipe_info[] = { ST21NFCA_DM_GETINFO_PIPE_INFO, NFC_HCI_TERMINAL_HOST_ID, 0 }; /* On ST21NFCA device pipes number are dynamics * A maximum of 16 pipes can be created at the same time * If pipes are already created, hci_dev_up will fail. * Doing a clear all pipe is a bad idea because: * - It does useless EEPROM cycling * - It might cause issue for secure elements support * (such as removing connectivity or APDU reader pipe) * A better approach on ST21NFCA is to: * - get a pipe list for each host. * (eg: NFC_HCI_HOST_CONTROLLER_ID for now). * (TODO Later on UICC HOST and eSE HOST) * - get pipe information * - match retrieved pipe list in st21nfca_gates * ST21NFCA_DEVICE_MGNT_GATE is a proprietary gate * with ST21NFCA_DEVICE_MGNT_PIPE. * Pipe can be closed and need to be open. */ r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DEVICE_MGNT_PIPE); if (r < 0) return r; /* Get pipe list */ r = nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DM_GETINFO, pipe_list, sizeof(pipe_list), &skb_pipe_list); if (r < 0) return r; /* Complete the existing gate_pipe table */ for (i = 0; i < skb_pipe_list->len; i++) { pipe_info[2] = skb_pipe_list->data[i]; r = nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DM_GETINFO, pipe_info, sizeof(pipe_info), &skb_pipe_info); if (r) continue; /* * Match pipe ID and gate ID * Output format from ST21NFC_DM_GETINFO is: * - pipe state (1byte) * - source hid (1byte) * - source gid (1byte) * - destination hid (1byte) * - destination gid (1byte) */ info = (struct st21nfca_pipe_info *) skb_pipe_info->data; if (info->dst_gate_id == ST21NFCA_APDU_READER_GATE && info->src_host_id == NFC_HCI_UICC_HOST_ID) { pr_err("Unexpected apdu_reader pipe on host %x\n", info->src_host_id); kfree_skb(skb_pipe_info); continue; } for (j = 3; (j < ARRAY_SIZE(st21nfca_gates)) && (st21nfca_gates[j].gate != info->dst_gate_id) ; j++) ; if (j < ARRAY_SIZE(st21nfca_gates) && st21nfca_gates[j].gate == info->dst_gate_id && ST21NFCA_DM_IS_PIPE_OPEN(info->pipe_state)) { hdev->init_data.gates[j].pipe = pipe_info[2]; hdev->gate2pipe[st21nfca_gates[j].gate] = pipe_info[2]; hdev->pipes[pipe_info[2]].gate = st21nfca_gates[j].gate; hdev->pipes[pipe_info[2]].dest_host = info->src_host_id; } kfree_skb(skb_pipe_info); } /* * 3 gates have a well known pipe ID. Only NFC_HCI_LINK_MGMT_GATE * is not yet open at this stage. */ r = nfc_hci_connect_gate(hdev, NFC_HCI_HOST_CONTROLLER_ID, NFC_HCI_LINK_MGMT_GATE, NFC_HCI_LINK_MGMT_PIPE); kfree_skb(skb_pipe_list); return r; } static int st21nfca_hci_open(struct nfc_hci_dev *hdev) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); int r; mutex_lock(&info->info_lock); if (info->state != ST21NFCA_ST_COLD) { r = -EBUSY; goto out; } r = info->phy_ops->enable(info->phy_id); if (r == 0) info->state = ST21NFCA_ST_READY; out: mutex_unlock(&info->info_lock); return r; } static void st21nfca_hci_close(struct nfc_hci_dev *hdev) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); mutex_lock(&info->info_lock); if (info->state == ST21NFCA_ST_COLD) goto out; info->phy_ops->disable(info->phy_id); info->state = ST21NFCA_ST_COLD; out: mutex_unlock(&info->info_lock); } static int st21nfca_hci_ready(struct nfc_hci_dev *hdev) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); struct sk_buff *skb; u8 param; u8 white_list[2]; int wl_size = 0; int r; if (info->se_status->is_uicc_present) white_list[wl_size++] = NFC_HCI_UICC_HOST_ID; if (info->se_status->is_ese_present) white_list[wl_size++] = ST21NFCA_ESE_HOST_ID; if (wl_size) { r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, NFC_HCI_ADMIN_WHITELIST, (u8 *) &white_list, wl_size); if (r < 0) return r; } /* Set NFC_MODE in device management gate to enable */ r = nfc_hci_get_param(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_NFC_MODE, &skb); if (r < 0) return r; param = skb->data[0]; kfree_skb(skb); if (param == 0) { param = 1; r = nfc_hci_set_param(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_NFC_MODE, ¶m, 1); if (r < 0) return r; } r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); if (r < 0) return r; r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, NFC_HCI_ID_MGMT_VERSION_SW, &skb); if (r < 0) return r; if (skb->len != FULL_VERSION_LEN) { kfree_skb(skb); return -EINVAL; } print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ", DUMP_PREFIX_NONE, 16, 1, skb->data, FULL_VERSION_LEN, false); kfree_skb(skb); return 0; } static int st21nfca_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); return info->phy_ops->write(info->phy_id, skb); } static int st21nfca_hci_start_poll(struct nfc_hci_dev *hdev, u32 im_protocols, u32 tm_protocols) { int r; u32 pol_req; u8 param[19]; struct sk_buff *datarate_skb; pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n", __func__, im_protocols, tm_protocols); r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); if (r < 0) return r; if (im_protocols) { /* * enable polling according to im_protocols & tm_protocols * - CLOSE pipe according to im_protocols & tm_protocols */ if ((NFC_HCI_RF_READER_B_GATE & im_protocols) == 0) { r = nfc_hci_disconnect_gate(hdev, NFC_HCI_RF_READER_B_GATE); if (r < 0) return r; } if ((NFC_HCI_RF_READER_A_GATE & im_protocols) == 0) { r = nfc_hci_disconnect_gate(hdev, NFC_HCI_RF_READER_A_GATE); if (r < 0) return r; } if ((ST21NFCA_RF_READER_F_GATE & im_protocols) == 0) { r = nfc_hci_disconnect_gate(hdev, ST21NFCA_RF_READER_F_GATE); if (r < 0) return r; } else { hdev->gb = nfc_get_local_general_bytes(hdev->ndev, &hdev->gb_len); if (hdev->gb == NULL || hdev->gb_len == 0) { im_protocols &= ~NFC_PROTO_NFC_DEP_MASK; tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK; } param[0] = ST21NFCA_RF_READER_F_DATARATE_106 | ST21NFCA_RF_READER_F_DATARATE_212 | ST21NFCA_RF_READER_F_DATARATE_424; r = nfc_hci_set_param(hdev, ST21NFCA_RF_READER_F_GATE, ST21NFCA_RF_READER_F_DATARATE, param, 1); if (r < 0) return r; pol_req = be32_to_cpu((__force __be32) ST21NFCA_RF_READER_F_POL_REQ_DEFAULT); r = nfc_hci_set_param(hdev, ST21NFCA_RF_READER_F_GATE, ST21NFCA_RF_READER_F_POL_REQ, (u8 *) &pol_req, 4); if (r < 0) return r; } if ((ST21NFCA_RF_READER_14443_3_A_GATE & im_protocols) == 0) { r = nfc_hci_disconnect_gate(hdev, ST21NFCA_RF_READER_14443_3_A_GATE); if (r < 0) return r; } if ((ST21NFCA_RF_READER_ISO15693_GATE & im_protocols) == 0) { r = nfc_hci_disconnect_gate(hdev, ST21NFCA_RF_READER_ISO15693_GATE); if (r < 0) return r; } r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, NFC_HCI_EVT_READER_REQUESTED, NULL, 0); if (r < 0) nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); } if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { r = nfc_hci_get_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_DATARATE, &datarate_skb); if (r < 0) return r; /* Configure the maximum supported datarate to 424Kbps */ if (datarate_skb->len > 0 && datarate_skb->data[0] != ST21NFCA_RF_CARD_F_DATARATE_212_424) { param[0] = ST21NFCA_RF_CARD_F_DATARATE_212_424; r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_DATARATE, param, 1); if (r < 0) { kfree_skb(datarate_skb); return r; } } kfree_skb(datarate_skb); /* * Configure sens_res * * NFC Forum Digital Spec Table 7: * NFCID1 size: triple (10 bytes) */ param[0] = 0x00; param[1] = 0x08; r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_SENS_RES, param, 2); if (r < 0) return r; /* * Configure sel_res * * NFC Forum Digistal Spec Table 17: * b3 set to 0b (value b7-b6): * - 10b: Configured for NFC-DEP Protocol */ param[0] = 0x40; r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_SEL_RES, param, 1); if (r < 0) return r; /* Configure NFCID1 Random uid */ r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_NFCID1, NULL, 0); if (r < 0) return r; /* Configure NFCID2_LIST */ /* System Code */ param[0] = 0x00; param[1] = 0x00; /* NFCID2 */ param[2] = 0x01; param[3] = 0xfe; param[4] = 'S'; param[5] = 'T'; param[6] = 'M'; param[7] = 'i'; param[8] = 'c'; param[9] = 'r'; /* 8 byte Pad bytes used for polling respone frame */ /* * Configuration byte: * - bit 0: define the default NFCID2 entry used when the * system code is equal to 'FFFF' * - bit 1: use a random value for lowest 6 bytes of * NFCID2 value * - bit 2: ignore polling request frame if request code * is equal to '01' * - Other bits are RFU */ param[18] = 0x01; r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_NFCID2_LIST, param, 19); if (r < 0) return r; param[0] = 0x02; r = nfc_hci_set_param(hdev, ST21NFCA_RF_CARD_F_GATE, ST21NFCA_RF_CARD_F_MODE, param, 1); } return r; } static void st21nfca_hci_stop_poll(struct nfc_hci_dev *hdev) { nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DM_DISCONNECT, NULL, 0, NULL); } static int st21nfca_get_iso14443_3_atqa(struct nfc_hci_dev *hdev, u16 *atqa) { int r; struct sk_buff *atqa_skb = NULL; r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE, ST21NFCA_RF_READER_14443_3_A_ATQA, &atqa_skb); if (r < 0) goto exit; if (atqa_skb->len != 2) { r = -EPROTO; goto exit; } *atqa = be16_to_cpu(*(__be16 *) atqa_skb->data); exit: kfree_skb(atqa_skb); return r; } static int st21nfca_get_iso14443_3_sak(struct nfc_hci_dev *hdev, u8 *sak) { int r; struct sk_buff *sak_skb = NULL; r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE, ST21NFCA_RF_READER_14443_3_A_SAK, &sak_skb); if (r < 0) goto exit; if (sak_skb->len != 1) { r = -EPROTO; goto exit; } *sak = sak_skb->data[0]; exit: kfree_skb(sak_skb); return r; } static int st21nfca_get_iso14443_3_uid(struct nfc_hci_dev *hdev, u8 *uid, int *len) { int r; struct sk_buff *uid_skb = NULL; r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_14443_3_A_GATE, ST21NFCA_RF_READER_14443_3_A_UID, &uid_skb); if (r < 0) goto exit; if (uid_skb->len == 0 || uid_skb->len > NFC_NFCID1_MAXSIZE) { r = -EPROTO; goto exit; } memcpy(uid, uid_skb->data, uid_skb->len); *len = uid_skb->len; exit: kfree_skb(uid_skb); return r; } static int st21nfca_get_iso15693_inventory(struct nfc_hci_dev *hdev, struct nfc_target *target) { int r; struct sk_buff *inventory_skb = NULL; r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_ISO15693_GATE, ST21NFCA_RF_READER_ISO15693_INVENTORY, &inventory_skb); if (r < 0) goto exit; skb_pull(inventory_skb, 2); if (inventory_skb->len == 0 || inventory_skb->len > NFC_ISO15693_UID_MAXSIZE) { r = -EPROTO; goto exit; } memcpy(target->iso15693_uid, inventory_skb->data, inventory_skb->len); target->iso15693_dsfid = inventory_skb->data[1]; target->is_iso15693 = 1; exit: kfree_skb(inventory_skb); return r; } static int st21nfca_hci_dep_link_up(struct nfc_hci_dev *hdev, struct nfc_target *target, u8 comm_mode, u8 *gb, size_t gb_len) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); info->dep_info.idx = target->idx; return st21nfca_im_send_atr_req(hdev, gb, gb_len); } static int st21nfca_hci_dep_link_down(struct nfc_hci_dev *hdev) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); info->state = ST21NFCA_ST_READY; return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DM_DISCONNECT, NULL, 0, NULL); } static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, struct nfc_target *target) { int r, len; u16 atqa; u8 sak; u8 uid[NFC_NFCID1_MAXSIZE]; switch (gate) { case ST21NFCA_RF_READER_F_GATE: target->supported_protocols = NFC_PROTO_FELICA_MASK; break; case ST21NFCA_RF_READER_14443_3_A_GATE: /* ISO14443-3 type 1 or 2 tags */ r = st21nfca_get_iso14443_3_atqa(hdev, &atqa); if (r < 0) return r; if (atqa == 0x000c) { target->supported_protocols = NFC_PROTO_JEWEL_MASK; target->sens_res = 0x0c00; } else { r = st21nfca_get_iso14443_3_sak(hdev, &sak); if (r < 0) return r; r = st21nfca_get_iso14443_3_uid(hdev, uid, &len); if (r < 0) return r; target->supported_protocols = nfc_hci_sak_to_protocol(sak); if (target->supported_protocols == 0xffffffff) return -EPROTO; target->sens_res = atqa; target->sel_res = sak; memcpy(target->nfcid1, uid, len); target->nfcid1_len = len; } break; case ST21NFCA_RF_READER_ISO15693_GATE: target->supported_protocols = NFC_PROTO_ISO15693_MASK; r = st21nfca_get_iso15693_inventory(hdev, target); if (r < 0) return r; break; default: return -EPROTO; } return 0; } static int st21nfca_hci_complete_target_discovered(struct nfc_hci_dev *hdev, u8 gate, struct nfc_target *target) { int r; struct sk_buff *nfcid_skb = NULL; if (gate == ST21NFCA_RF_READER_F_GATE) { r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE, ST21NFCA_RF_READER_F_NFCID2, &nfcid_skb); if (r < 0) goto exit; if (nfcid_skb->len > NFC_SENSF_RES_MAXSIZE) { r = -EPROTO; goto exit; } /* * - After the recepton of polling response for type F frame * at 212 or 424 Kbit/s, NFCID2 registry parameters will be * updated. * - After the reception of SEL_RES with NFCIP-1 compliant bit * set for type A frame NFCID1 will be updated */ if (nfcid_skb->len > 0) { /* P2P in type F */ memcpy(target->sensf_res, nfcid_skb->data, nfcid_skb->len); target->sensf_res_len = nfcid_skb->len; /* NFC Forum Digital Protocol Table 44 */ if (target->sensf_res[0] == 0x01 && target->sensf_res[1] == 0xfe) target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; else target->supported_protocols = NFC_PROTO_FELICA_MASK; } else { kfree_skb(nfcid_skb); nfcid_skb = NULL; /* P2P in type A */ r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE, ST21NFCA_RF_READER_F_NFCID1, &nfcid_skb); if (r < 0) goto exit; if (nfcid_skb->len > NFC_NFCID1_MAXSIZE) { r = -EPROTO; goto exit; } memcpy(target->sensf_res, nfcid_skb->data, nfcid_skb->len); target->sensf_res_len = nfcid_skb->len; target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; } target->hci_reader_gate = ST21NFCA_RF_READER_F_GATE; } r = 1; exit: kfree_skb(nfcid_skb); return r; } #define ST21NFCA_CB_TYPE_READER_ISO15693 1 static void st21nfca_hci_data_exchange_cb(void *context, struct sk_buff *skb, int err) { struct st21nfca_hci_info *info = context; switch (info->async_cb_type) { case ST21NFCA_CB_TYPE_READER_ISO15693: if (err == 0) skb_trim(skb, skb->len - 1); info->async_cb(info->async_cb_context, skb, err); break; default: if (err == 0) kfree_skb(skb); break; } } /* * Returns: * <= 0: driver handled the data exchange * 1: driver doesn't especially handle, please do standard processing */ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev, struct nfc_target *target, struct sk_buff *skb, data_exchange_cb_t cb, void *cb_context) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); pr_info(DRIVER_DESC ": %s for gate=%d len=%d\n", __func__, target->hci_reader_gate, skb->len); switch (target->hci_reader_gate) { case ST21NFCA_RF_READER_F_GATE: if (target->supported_protocols == NFC_PROTO_NFC_DEP_MASK) return st21nfca_im_send_dep_req(hdev, skb); *(u8 *)skb_push(skb, 1) = 0x1a; return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, cb, cb_context); case ST21NFCA_RF_READER_14443_3_A_GATE: *(u8 *)skb_push(skb, 1) = 0x1a; /* CTR, see spec:10.2.2.1 */ return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, cb, cb_context); case ST21NFCA_RF_READER_ISO15693_GATE: info->async_cb_type = ST21NFCA_CB_TYPE_READER_ISO15693; info->async_cb = cb; info->async_cb_context = cb_context; *(u8 *)skb_push(skb, 1) = 0x17; return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, st21nfca_hci_data_exchange_cb, info); break; default: return 1; } } static int st21nfca_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) { return st21nfca_tm_send_dep_res(hdev, skb); } static int st21nfca_hci_check_presence(struct nfc_hci_dev *hdev, struct nfc_target *target) { u8 fwi = 0x11; switch (target->hci_reader_gate) { case NFC_HCI_RF_READER_A_GATE: case NFC_HCI_RF_READER_B_GATE: /* * PRESENCE_CHECK on those gates is available * However, the answer to this command is taking 3 * fwi * if the card is no present. * Instead, we send an empty I-Frame with a very short * configurable fwi ~604µs. */ return nfc_hci_send_cmd(hdev, target->hci_reader_gate, ST21NFCA_WR_XCHG_DATA, &fwi, 1, NULL); case ST21NFCA_RF_READER_14443_3_A_GATE: return nfc_hci_send_cmd(hdev, target->hci_reader_gate, ST21NFCA_RF_READER_CMD_PRESENCE_CHECK, NULL, 0, NULL); default: return -EOPNOTSUPP; } } static void st21nfca_hci_cmd_received(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd, struct sk_buff *skb) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); u8 gate = hdev->pipes[pipe].gate; pr_debug("cmd: %x\n", cmd); switch (cmd) { case NFC_HCI_ANY_OPEN_PIPE: if (gate != ST21NFCA_APDU_READER_GATE && hdev->pipes[pipe].dest_host != NFC_HCI_UICC_HOST_ID) info->se_info.count_pipes++; if (info->se_info.count_pipes == info->se_info.expected_pipes) { del_timer_sync(&info->se_info.se_active_timer); info->se_info.se_active = false; info->se_info.count_pipes = 0; complete(&info->se_info.req_completion); } break; } } static int st21nfca_admin_event_received(struct nfc_hci_dev *hdev, u8 event, struct sk_buff *skb) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); pr_debug("admin event: %x\n", event); switch (event) { case ST21NFCA_EVT_HOT_PLUG: if (info->se_info.se_active) { if (!ST21NFCA_EVT_HOT_PLUG_IS_INHIBITED(skb)) { del_timer_sync(&info->se_info.se_active_timer); info->se_info.se_active = false; complete(&info->se_info.req_completion); } else { mod_timer(&info->se_info.se_active_timer, jiffies + msecs_to_jiffies(ST21NFCA_SE_TO_PIPES)); } } break; default: nfc_err(&hdev->ndev->dev, "Unexpected event on admin gate\n"); } kfree_skb(skb); return 0; } /* * Returns: * <= 0: driver handled the event, skb consumed * 1: driver does not handle the event, please do standard processing */ static int st21nfca_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event, struct sk_buff *skb) { u8 gate = hdev->pipes[pipe].gate; u8 host = hdev->pipes[pipe].dest_host; pr_debug("hci event: %d gate: %x\n", event, gate); switch (gate) { case NFC_HCI_ADMIN_GATE: return st21nfca_admin_event_received(hdev, event, skb); case ST21NFCA_RF_CARD_F_GATE: return st21nfca_dep_event_received(hdev, event, skb); case ST21NFCA_CONNECTIVITY_GATE: return st21nfca_connectivity_event_received(hdev, host, 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; } } static struct nfc_hci_ops st21nfca_hci_ops = { .open = st21nfca_hci_open, .close = st21nfca_hci_close, .load_session = st21nfca_hci_load_session, .hci_ready = st21nfca_hci_ready, .xmit = st21nfca_hci_xmit, .start_poll = st21nfca_hci_start_poll, .stop_poll = st21nfca_hci_stop_poll, .dep_link_up = st21nfca_hci_dep_link_up, .dep_link_down = st21nfca_hci_dep_link_down, .target_from_gate = st21nfca_hci_target_from_gate, .complete_target_discovered = st21nfca_hci_complete_target_discovered, .im_transceive = st21nfca_hci_im_transceive, .tm_send = st21nfca_hci_tm_send, .check_presence = st21nfca_hci_check_presence, .event_received = st21nfca_hci_event_received, .cmd_received = st21nfca_hci_cmd_received, .discover_se = st21nfca_hci_discover_se, .enable_se = st21nfca_hci_enable_se, .disable_se = st21nfca_hci_disable_se, .se_io = st21nfca_hci_se_io, }; 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_hci_info *info; int r = 0; int dev_num; u32 protocols; struct nfc_hci_init_data init_data; unsigned long quirks = 0; info = kzalloc(sizeof(struct st21nfca_hci_info), GFP_KERNEL); if (!info) return -ENOMEM; info->phy_ops = phy_ops; info->phy_id = phy_id; info->state = ST21NFCA_ST_COLD; mutex_init(&info->info_lock); init_data.gate_count = ARRAY_SIZE(st21nfca_gates); memcpy(init_data.gates, st21nfca_gates, sizeof(st21nfca_gates)); /* * Session id must include the driver name + i2c bus addr * persistent info to discriminate 2 identical chips */ dev_num = find_first_zero_bit(dev_mask, ST21NFCA_NUM_DEVICES); if (dev_num >= ST21NFCA_NUM_DEVICES) { r = -ENODEV; goto err_alloc_hdev; } set_bit(dev_num, dev_mask); scnprintf(init_data.session_id, sizeof(init_data.session_id), "%s%2x", "ST21AH", dev_num); protocols = NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK | NFC_PROTO_ISO14443_B_MASK | NFC_PROTO_ISO15693_MASK | NFC_PROTO_NFC_DEP_MASK; set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks); info->hdev = nfc_hci_allocate_device(&st21nfca_hci_ops, &init_data, quirks, protocols, llc_name, phy_headroom + ST21NFCA_CMDS_HEADROOM, phy_tailroom, phy_payload); if (!info->hdev) { pr_err("Cannot allocate nfc hdev.\n"); r = -ENOMEM; goto err_alloc_hdev; } info->se_status = se_status; nfc_hci_set_clientdata(info->hdev, info); r = nfc_hci_register_device(info->hdev); if (r) goto err_regdev; *hdev = info->hdev; st21nfca_dep_init(info->hdev); st21nfca_se_init(info->hdev); st21nfca_vendor_cmds_init(info->hdev); return 0; err_regdev: nfc_hci_free_device(info->hdev); err_alloc_hdev: kfree(info); return r; } EXPORT_SYMBOL(st21nfca_hci_probe); void st21nfca_hci_remove(struct nfc_hci_dev *hdev) { struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); st21nfca_dep_deinit(hdev); st21nfca_se_deinit(hdev); nfc_hci_unregister_device(hdev); nfc_hci_free_device(hdev); kfree(info); } EXPORT_SYMBOL(st21nfca_hci_remove); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION(DRIVER_DESC);
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