| /* |
| * HCI based Driver for STMicroelectronics NFC Chip |
| * |
| * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved. |
| * |
| * 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 that 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/nfc.h> |
| #include <net/nfc/hci.h> |
| #include <net/nfc/llc.h> |
| |
| #include "st21nfca.h" |
| #include "st21nfca_dep.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_GATE 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*/ |
| |
| 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_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE}, |
| {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE}, |
| {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_LINK_MGMT_PIPE}, |
| {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE}, |
| {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE}, |
| {ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DEVICE_MGNT_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}, |
| }; |
| |
| 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 |
| }; |
| |
| skb_pipe_list = alloc_skb(ST21NFCA_HCI_LLC_MAX_SIZE, GFP_KERNEL); |
| if (!skb_pipe_list) { |
| r = -ENOMEM; |
| goto free_list; |
| } |
| |
| skb_pipe_info = alloc_skb(ST21NFCA_HCI_LLC_MAX_SIZE, GFP_KERNEL); |
| if (!skb_pipe_info) { |
| r = -ENOMEM; |
| goto free_info; |
| } |
| |
| /* 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) |
| goto free_info; |
| |
| /* 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) |
| goto free_info; |
| |
| /* 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; |
| for (j = 0; (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)) { |
| st21nfca_gates[j].pipe = pipe_info[2]; |
| hdev->gate2pipe[st21nfca_gates[j].gate] = |
| st21nfca_gates[j].pipe; |
| } |
| } |
| |
| /* |
| * 3 gates have a well known pipe ID. |
| * They will never appear in the pipe list |
| */ |
| if (skb_pipe_list->len + 3 < ARRAY_SIZE(st21nfca_gates)) { |
| for (i = skb_pipe_list->len + 3; |
| i < ARRAY_SIZE(st21nfca_gates); i++) { |
| r = nfc_hci_connect_gate(hdev, |
| NFC_HCI_HOST_CONTROLLER_ID, |
| st21nfca_gates[i].gate, |
| st21nfca_gates[i].pipe); |
| if (r < 0) |
| goto free_info; |
| } |
| } |
| |
| memcpy(hdev->init_data.gates, st21nfca_gates, sizeof(st21nfca_gates)); |
| free_info: |
| kfree_skb(skb_pipe_info); |
| free_list: |
| 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 sk_buff *skb; |
| |
| u8 param; |
| int r; |
| |
| param = NFC_HCI_UICC_HOST_ID; |
| r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, |
| NFC_HCI_ADMIN_WHITELIST, ¶m, 1); |
| 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; |
| |
| if (skb->data[0] == 0) { |
| kfree_skb(skb); |
| 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) |
| return r; |
| } |
| |
| /* |
| * 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 *gate, |
| 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; |
| } |
| |
| gate = uid_skb->data; |
| *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 *nfcid2_skb = NULL, *nfcid1_skb; |
| |
| if (gate == ST21NFCA_RF_READER_F_GATE) { |
| r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE, |
| ST21NFCA_RF_READER_F_NFCID2, &nfcid2_skb); |
| if (r < 0) |
| goto exit; |
| |
| if (nfcid2_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 (nfcid2_skb->len > 0) { |
| /* P2P in type F */ |
| memcpy(target->sensf_res, nfcid2_skb->data, |
| nfcid2_skb->len); |
| target->sensf_res_len = nfcid2_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 { |
| /* P2P in type A */ |
| r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_F_GATE, |
| ST21NFCA_RF_READER_F_NFCID1, |
| &nfcid1_skb); |
| if (r < 0) |
| goto exit; |
| |
| if (nfcid1_skb->len > NFC_NFCID1_MAXSIZE) { |
| r = -EPROTO; |
| goto exit; |
| } |
| memcpy(target->sensf_res, nfcid1_skb->data, |
| nfcid1_skb->len); |
| target->sensf_res_len = nfcid1_skb->len; |
| target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
| } |
| target->hci_reader_gate = ST21NFCA_RF_READER_F_GATE; |
| } |
| r = 1; |
| exit: |
| kfree_skb(nfcid2_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); |
| |
| *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: |
| *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; |
| |
| *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; |
| } |
| } |
| |
| /* |
| * 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 gate, |
| u8 event, struct sk_buff *skb) |
| { |
| pr_debug("hci event: %d gate: %x\n", event, gate); |
| |
| switch (gate) { |
| case ST21NFCA_RF_CARD_F_GATE: |
| return st21nfca_dep_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, |
| }; |
| |
| 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_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) { |
| r = -ENOMEM; |
| goto err_alloc_hdev; |
| } |
| |
| 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) |
| return -ENODEV; |
| |
| 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; |
| } |
| |
| 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); |
| |
| 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); |
| nfc_hci_unregister_device(hdev); |
| nfc_hci_free_device(hdev); |
| kfree(info); |
| } |
| EXPORT_SYMBOL(st21nfca_hci_remove); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |