// SPDX-License-Identifier: GPL-2.0-only /* * HCI based Driver for NXP PN544 NFC Chip * * Copyright (C) 2012 Intel Corporation. All rights reserved. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include "pn544.h" /* Timing restrictions (ms) */ #define PN544_HCI_RESETVEN_TIME 30 enum pn544_state { PN544_ST_COLD, PN544_ST_FW_READY, PN544_ST_READY, }; #define FULL_VERSION_LEN 11 /* Proprietary commands */ #define PN544_WRITE 0x3f #define PN544_TEST_SWP 0x21 /* Proprietary gates, events, commands and registers */ /* NFC_HCI_RF_READER_A_GATE additional registers and commands */ #define PN544_RF_READER_A_AUTO_ACTIVATION 0x10 #define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12 #define PN544_MIFARE_CMD 0x21 /* Commands that apply to all RF readers */ #define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30 #define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32 /* NFC_HCI_ID_MGMT_GATE additional registers */ #define PN544_ID_MGMT_FULL_VERSION_SW 0x10 #define PN544_RF_READER_ISO15693_GATE 0x12 #define PN544_RF_READER_F_GATE 0x14 #define PN544_FELICA_ID 0x04 #define PN544_FELICA_RAW 0x20 #define PN544_RF_READER_JEWEL_GATE 0x15 #define PN544_JEWEL_RAW_CMD 0x23 #define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30 #define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31 #define PN544_SYS_MGMT_GATE 0x90 #define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02 #define PN544_POLLING_LOOP_MGMT_GATE 0x94 #define PN544_DEP_MODE 0x01 #define PN544_DEP_ATR_REQ 0x02 #define PN544_DEP_ATR_RES 0x03 #define PN544_DEP_MERGE 0x0D #define PN544_PL_RDPHASES 0x06 #define PN544_PL_EMULATION 0x07 #define PN544_PL_NFCT_DEACTIVATED 0x09 #define PN544_SWP_MGMT_GATE 0xA0 #define PN544_SWP_DEFAULT_MODE 0x01 #define PN544_NFC_WI_MGMT_GATE 0xA1 #define PN544_NFC_ESE_DEFAULT_MODE 0x01 #define PN544_HCI_EVT_SND_DATA 0x01 #define PN544_HCI_EVT_ACTIVATED 0x02 #define PN544_HCI_EVT_DEACTIVATED 0x03 #define PN544_HCI_EVT_RCV_DATA 0x04 #define PN544_HCI_EVT_CONTINUE_MI 0x05 #define PN544_HCI_EVT_SWITCH_MODE 0x03 #define PN544_HCI_CMD_ATTREQUEST 0x12 #define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13 static struct nfc_hci_gate pn544_gates[] = { {NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {NFC_HCI_LINK_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}, {PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE}, {PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE}, {PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE}, {PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE}, {PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE}, {PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE} }; /* Largest headroom needed for outgoing custom commands */ #define PN544_CMDS_HEADROOM 2 struct pn544_hci_info { struct nfc_phy_ops *phy_ops; void *phy_id; struct nfc_hci_dev *hdev; enum pn544_state state; struct mutex info_lock; int async_cb_type; data_exchange_cb_t async_cb; void *async_cb_context; fw_download_t fw_download; }; static int pn544_hci_open(struct nfc_hci_dev *hdev) { struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); int r = 0; mutex_lock(&info->info_lock); if (info->state != PN544_ST_COLD) { r = -EBUSY; goto out; } r = info->phy_ops->enable(info->phy_id); if (r == 0) info->state = PN544_ST_READY; out: mutex_unlock(&info->info_lock); return r; } static void pn544_hci_close(struct nfc_hci_dev *hdev) { struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); mutex_lock(&info->info_lock); if (info->state == PN544_ST_COLD) goto out; info->phy_ops->disable(info->phy_id); info->state = PN544_ST_COLD; out: mutex_unlock(&info->info_lock); } static int pn544_hci_ready(struct nfc_hci_dev *hdev) { struct sk_buff *skb; static struct hw_config { u8 adr[2]; u8 value; } hw_config[] = { {{0x9f, 0x9a}, 0x00}, {{0x98, 0x10}, 0xbc}, {{0x9e, 0x71}, 0x00}, {{0x98, 0x09}, 0x00}, {{0x9e, 0xb4}, 0x00}, {{0x9c, 0x01}, 0x08}, {{0x9e, 0xaa}, 0x01}, {{0x9b, 0xd1}, 0x17}, {{0x9b, 0xd2}, 0x58}, {{0x9b, 0xd3}, 0x10}, {{0x9b, 0xd4}, 0x47}, {{0x9b, 0xd5}, 0x0c}, {{0x9b, 0xd6}, 0x37}, {{0x9b, 0xdd}, 0x33}, {{0x9b, 0x84}, 0x00}, {{0x99, 0x81}, 0x79}, {{0x99, 0x31}, 0x79}, {{0x98, 0x00}, 0x3f}, {{0x9f, 0x09}, 0x02}, {{0x9f, 0x0a}, 0x05}, {{0x9e, 0xd1}, 0xa1}, {{0x99, 0x23}, 0x01}, {{0x9e, 0x74}, 0x00}, {{0x9e, 0x90}, 0x00}, {{0x9f, 0x28}, 0x10}, {{0x9f, 0x35}, 0x04}, {{0x9f, 0x36}, 0x11}, {{0x9c, 0x31}, 0x00}, {{0x9c, 0x32}, 0x00}, {{0x9c, 0x19}, 0x0a}, {{0x9c, 0x1a}, 0x0a}, {{0x9c, 0x0c}, 0x00}, {{0x9c, 0x0d}, 0x00}, {{0x9c, 0x12}, 0x00}, {{0x9c, 0x13}, 0x00}, {{0x98, 0xa2}, 0x09}, {{0x98, 0x93}, 0x00}, {{0x98, 0x7d}, 0x08}, {{0x98, 0x7e}, 0x00}, {{0x9f, 0xc8}, 0x00}, }; struct hw_config *p = hw_config; int count = ARRAY_SIZE(hw_config); struct sk_buff *res_skb; u8 param[4]; int r; param[0] = 0; while (count--) { param[1] = p->adr[0]; param[2] = p->adr[1]; param[3] = p->value; r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE, param, 4, &res_skb); if (r < 0) return r; if (res_skb->len != 1) { kfree_skb(res_skb); return -EPROTO; } if (res_skb->data[0] != p->value) { kfree_skb(res_skb); return -EIO; } kfree_skb(res_skb); p++; } param[0] = NFC_HCI_UICC_HOST_ID; r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, NFC_HCI_ADMIN_WHITELIST, param, 1); if (r < 0) return r; param[0] = 0x3d; r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE, PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1); if (r < 0) return r; param[0] = 0x0; r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE, PN544_RF_READER_A_AUTO_ACTIVATION, param, 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; param[0] = 0x1; r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, PN544_PL_NFCT_DEACTIVATED, param, 1); if (r < 0) return r; param[0] = 0x0; r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, PN544_PL_RDPHASES, param, 1); if (r < 0) return r; r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, PN544_ID_MGMT_FULL_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 pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) { struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); return info->phy_ops->write(info->phy_id, skb); } static int pn544_hci_start_poll(struct nfc_hci_dev *hdev, u32 im_protocols, u32 tm_protocols) { u8 phases = 0; int r; u8 duration[2]; u8 activated; u8 i_mode = 0x3f; /* Enable all supported modes */ u8 t_mode = 0x0f; u8 t_merge = 0x01; /* Enable merge by default */ 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; duration[0] = 0x18; duration[1] = 0x6a; r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, PN544_PL_EMULATION, duration, 2); if (r < 0) return r; activated = 0; r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, PN544_PL_NFCT_DEACTIVATED, &activated, 1); if (r < 0) return r; if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_JEWEL_MASK)) phases |= 1; /* Type A */ if (im_protocols & NFC_PROTO_FELICA_MASK) { phases |= (1 << 2); /* Type F 212 */ phases |= (1 << 3); /* Type F 424 */ } phases |= (1 << 5); /* NFC active */ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, PN544_PL_RDPHASES, &phases, 1); if (r < 0) return r; if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { hdev->gb = nfc_get_local_general_bytes(hdev->ndev, &hdev->gb_len); pr_debug("generate local bytes %p\n", hdev->gb); if (hdev->gb == NULL || hdev->gb_len == 0) { im_protocols &= ~NFC_PROTO_NFC_DEP_MASK; tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK; } } if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); if (r < 0) return r; r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, PN544_DEP_MODE, &i_mode, 1); if (r < 0) return r; r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len); if (r < 0) return r; r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_EVT_READER_REQUESTED, NULL, 0); if (r < 0) nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); } if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, PN544_DEP_MODE, &t_mode, 1); if (r < 0) return r; r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len); if (r < 0) return r; r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, PN544_DEP_MERGE, &t_merge, 1); 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); return r; } static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev, struct nfc_target *target, u8 comm_mode, u8 *gb, size_t gb_len) { struct sk_buff *rgb_skb = NULL; int r; r = nfc_hci_get_param(hdev, target->hci_reader_gate, PN544_DEP_ATR_RES, &rgb_skb); if (r < 0) return r; if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) { r = -EPROTO; goto exit; } print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET, 16, 1, rgb_skb->data, rgb_skb->len, true); r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data, rgb_skb->len); if (r == 0) r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode, NFC_RF_INITIATOR); exit: kfree_skb(rgb_skb); return r; } static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev) { return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_EVT_END_OPERATION, NULL, 0); } static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, struct nfc_target *target) { switch (gate) { case PN544_RF_READER_F_GATE: target->supported_protocols = NFC_PROTO_FELICA_MASK; break; case PN544_RF_READER_JEWEL_GATE: target->supported_protocols = NFC_PROTO_JEWEL_MASK; target->sens_res = 0x0c00; break; case PN544_RF_READER_NFCIP1_INITIATOR_GATE: target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; break; default: return -EPROTO; } return 0; } static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev, u8 gate, struct nfc_target *target) { struct sk_buff *uid_skb; int r = 0; if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) return r; if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { r = nfc_hci_send_cmd(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); if (r < 0) return r; target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && target->nfcid1_len != 10) return -EPROTO; r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, PN544_RF_READER_CMD_ACTIVATE_NEXT, target->nfcid1, target->nfcid1_len, NULL); } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) { r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE, PN544_FELICA_ID, &uid_skb); if (r < 0) return r; if (uid_skb->len != 8) { kfree_skb(uid_skb); return -EPROTO; } /* Type F NFC-DEP IDm has prefix 0x01FE */ if ((uid_skb->data[0] == 0x01) && (uid_skb->data[1] == 0xfe)) { kfree_skb(uid_skb); r = nfc_hci_send_cmd(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); if (r < 0) return r; target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; } else { r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, PN544_RF_READER_CMD_ACTIVATE_NEXT, uid_skb->data, uid_skb->len, NULL); kfree_skb(uid_skb); } } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) { /* * TODO: maybe other ISO 14443 require some kind of continue * activation, but for now we've seen only this one below. */ if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */ r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); } return r; } #define PN544_CB_TYPE_READER_F 1 static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb, int err) { struct pn544_hci_info *info = context; switch (info->async_cb_type) { case PN544_CB_TYPE_READER_F: if (err == 0) skb_pull(skb, 1); info->async_cb(info->async_cb_context, skb, err); break; default: if (err == 0) kfree_skb(skb); break; } } #define MIFARE_CMD_AUTH_KEY_A 0x60 #define MIFARE_CMD_AUTH_KEY_B 0x61 #define MIFARE_CMD_HEADER 2 #define MIFARE_UID_LEN 4 #define MIFARE_KEY_LEN 6 #define MIFARE_CMD_LEN 12 /* * Returns: * <= 0: driver handled the data exchange * 1: driver doesn't especially handle, please do standard processing */ static int pn544_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 pn544_hci_info *info = nfc_hci_get_clientdata(hdev); pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__, target->hci_reader_gate); switch (target->hci_reader_gate) { case NFC_HCI_RF_READER_A_GATE: if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { /* * It seems that pn544 is inverting key and UID for * MIFARE authentication commands. */ if (skb->len == MIFARE_CMD_LEN && (skb->data[0] == MIFARE_CMD_AUTH_KEY_A || skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) { u8 uid[MIFARE_UID_LEN]; u8 *data = skb->data + MIFARE_CMD_HEADER; memcpy(uid, data + MIFARE_KEY_LEN, MIFARE_UID_LEN); memmove(data + MIFARE_UID_LEN, data, MIFARE_KEY_LEN); memcpy(data, uid, MIFARE_UID_LEN); } return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, PN544_MIFARE_CMD, skb->data, skb->len, cb, cb_context); } else return 1; case PN544_RF_READER_F_GATE: *(u8 *)skb_push(skb, 1) = 0; *(u8 *)skb_push(skb, 1) = 0; info->async_cb_type = PN544_CB_TYPE_READER_F; info->async_cb = cb; info->async_cb_context = cb_context; return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, PN544_FELICA_RAW, skb->data, skb->len, pn544_hci_data_exchange_cb, info); case PN544_RF_READER_JEWEL_GATE: return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, PN544_JEWEL_RAW_CMD, skb->data, skb->len, cb, cb_context); case PN544_RF_READER_NFCIP1_INITIATOR_GATE: *(u8 *)skb_push(skb, 1) = 0; return nfc_hci_send_event(hdev, target->hci_reader_gate, PN544_HCI_EVT_SND_DATA, skb->data, skb->len); default: return 1; } } static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) { int r; /* Set default false for multiple information chaining */ *(u8 *)skb_push(skb, 1) = 0; r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, PN544_HCI_EVT_SND_DATA, skb->data, skb->len); kfree_skb(skb); return r; } static int pn544_hci_check_presence(struct nfc_hci_dev *hdev, struct nfc_target *target) { pr_debug("supported protocol %d\n", target->supported_protocols); if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_ISO14443_B_MASK)) { return nfc_hci_send_cmd(hdev, target->hci_reader_gate, PN544_RF_READER_CMD_PRESENCE_CHECK, NULL, 0, NULL); } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && target->nfcid1_len != 10) return -EOPNOTSUPP; return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, PN544_RF_READER_CMD_ACTIVATE_NEXT, target->nfcid1, target->nfcid1_len, NULL); } else if (target->supported_protocols & (NFC_PROTO_JEWEL_MASK | NFC_PROTO_FELICA_MASK)) { return -EOPNOTSUPP; } else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { return nfc_hci_send_cmd(hdev, target->hci_reader_gate, PN544_HCI_CMD_ATTREQUEST, NULL, 0, NULL); } return 0; } /* * Returns: * <= 0: driver handled the event, skb consumed * 1: driver does not handle the event, please do standard processing */ static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event, struct sk_buff *skb) { struct sk_buff *rgb_skb = NULL; u8 gate = hdev->pipes[pipe].gate; int r; pr_debug("hci event %d\n", event); switch (event) { case PN544_HCI_EVT_ACTIVATED: if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) { r = nfc_hci_target_discovered(hdev, gate); } else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) { r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ, &rgb_skb); if (r < 0) goto exit; r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, NFC_COMM_PASSIVE, rgb_skb->data, rgb_skb->len); kfree_skb(rgb_skb); } else { r = -EINVAL; } break; case PN544_HCI_EVT_DEACTIVATED: r = nfc_hci_send_event(hdev, gate, NFC_HCI_EVT_END_OPERATION, NULL, 0); break; case PN544_HCI_EVT_RCV_DATA: if (skb->len < 2) { r = -EPROTO; goto exit; } if (skb->data[0] != 0) { pr_debug("data0 %d\n", skb->data[0]); r = -EPROTO; goto exit; } skb_pull(skb, 2); return nfc_tm_data_received(hdev->ndev, skb); default: return 1; } exit: kfree_skb(skb); return r; } static int pn544_hci_fw_download(struct nfc_hci_dev *hdev, const char *firmware_name) { struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); if (info->fw_download == NULL) return -ENOTSUPP; return info->fw_download(info->phy_id, firmware_name, hdev->sw_romlib); } static int pn544_hci_discover_se(struct nfc_hci_dev *hdev) { u32 se_idx = 0; u8 ese_mode = 0x01; /* Default mode */ struct sk_buff *res_skb; int r; r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_TEST_SWP, NULL, 0, &res_skb); if (r == 0) { if (res_skb->len == 2 && res_skb->data[0] == 0x00) nfc_add_se(hdev->ndev, se_idx++, NFC_SE_UICC); kfree_skb(res_skb); } r = nfc_hci_send_event(hdev, PN544_NFC_WI_MGMT_GATE, PN544_HCI_EVT_SWITCH_MODE, &ese_mode, 1); if (r == 0) nfc_add_se(hdev->ndev, se_idx++, NFC_SE_EMBEDDED); return !se_idx; } #define PN544_SE_MODE_OFF 0x00 #define PN544_SE_MODE_ON 0x01 static int pn544_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx) { struct nfc_se *se; u8 enable = PN544_SE_MODE_ON; static struct uicc_gatelist { u8 head; u8 adr[2]; u8 value; } uicc_gatelist[] = { {0x00, {0x9e, 0xd9}, 0x23}, {0x00, {0x9e, 0xda}, 0x21}, {0x00, {0x9e, 0xdb}, 0x22}, {0x00, {0x9e, 0xdc}, 0x24}, }; struct uicc_gatelist *p = uicc_gatelist; int count = ARRAY_SIZE(uicc_gatelist); struct sk_buff *res_skb; int r; se = nfc_find_se(hdev->ndev, se_idx); switch (se->type) { case NFC_SE_UICC: while (count--) { r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE, (u8 *)p, 4, &res_skb); if (r < 0) return r; if (res_skb->len != 1) { kfree_skb(res_skb); return -EPROTO; } if (res_skb->data[0] != p->value) { kfree_skb(res_skb); return -EIO; } kfree_skb(res_skb); p++; } return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE, PN544_SWP_DEFAULT_MODE, &enable, 1); case NFC_SE_EMBEDDED: return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE, PN544_NFC_ESE_DEFAULT_MODE, &enable, 1); default: return -EINVAL; } } static int pn544_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx) { struct nfc_se *se; u8 disable = PN544_SE_MODE_OFF; se = nfc_find_se(hdev->ndev, se_idx); switch (se->type) { case NFC_SE_UICC: return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE, PN544_SWP_DEFAULT_MODE, &disable, 1); case NFC_SE_EMBEDDED: return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE, PN544_NFC_ESE_DEFAULT_MODE, &disable, 1); default: return -EINVAL; } } static struct nfc_hci_ops pn544_hci_ops = { .open = pn544_hci_open, .close = pn544_hci_close, .hci_ready = pn544_hci_ready, .xmit = pn544_hci_xmit, .start_poll = pn544_hci_start_poll, .dep_link_up = pn544_hci_dep_link_up, .dep_link_down = pn544_hci_dep_link_down, .target_from_gate = pn544_hci_target_from_gate, .complete_target_discovered = pn544_hci_complete_target_discovered, .im_transceive = pn544_hci_im_transceive, .tm_send = pn544_hci_tm_send, .check_presence = pn544_hci_check_presence, .event_received = pn544_hci_event_received, .fw_download = pn544_hci_fw_download, .discover_se = pn544_hci_discover_se, .enable_se = pn544_hci_enable_se, .disable_se = pn544_hci_disable_se, }; int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name, int phy_headroom, int phy_tailroom, int phy_payload, fw_download_t fw_download, struct nfc_hci_dev **hdev) { struct pn544_hci_info *info; u32 protocols; struct nfc_hci_init_data init_data; int r; info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL); if (!info) { r = -ENOMEM; goto err_info_alloc; } info->phy_ops = phy_ops; info->phy_id = phy_id; info->fw_download = fw_download; info->state = PN544_ST_COLD; mutex_init(&info->info_lock); init_data.gate_count = ARRAY_SIZE(pn544_gates); memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates)); /* * TODO: Session id must include the driver name + some bus addr * persistent info to discriminate 2 identical chips */ strcpy(init_data.session_id, "ID544HCI"); protocols = NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK | NFC_PROTO_ISO14443_B_MASK | NFC_PROTO_NFC_DEP_MASK; info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 0, protocols, llc_name, phy_headroom + PN544_CMDS_HEADROOM, phy_tailroom, phy_payload); if (!info->hdev) { pr_err("Cannot allocate nfc hdev\n"); r = -ENOMEM; goto err_alloc_hdev; } nfc_hci_set_clientdata(info->hdev, info); r = nfc_hci_register_device(info->hdev); if (r) goto err_regdev; *hdev = info->hdev; return 0; err_regdev: nfc_hci_free_device(info->hdev); err_alloc_hdev: kfree(info); err_info_alloc: return r; } EXPORT_SYMBOL(pn544_hci_probe); void pn544_hci_remove(struct nfc_hci_dev *hdev) { struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); nfc_hci_unregister_device(hdev); nfc_hci_free_device(hdev); kfree(info); } EXPORT_SYMBOL(pn544_hci_remove); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION(DRIVER_DESC);