Align st21nfca driver with or nfc driver: - Remove st21nfca_ prefix - Merge st21nfca_se.h, st21nfca_dep.h in st21nfca.h Signed-off-by: Christophe Ricard <christophe-h.ricard@xxxxxx> --- drivers/nfc/st21nfca/Makefile | 2 +- drivers/nfc/st21nfca/core.c | 1062 ++++++++++++++++++++++++++++++++++ drivers/nfc/st21nfca/dep.c | 688 ++++++++++++++++++++++ drivers/nfc/st21nfca/se.c | 419 ++++++++++++++ drivers/nfc/st21nfca/st21nfca.c | 1064 ----------------------------------- drivers/nfc/st21nfca/st21nfca.h | 98 +++- drivers/nfc/st21nfca/st21nfca_dep.c | 689 ----------------------- drivers/nfc/st21nfca/st21nfca_dep.h | 43 -- drivers/nfc/st21nfca/st21nfca_se.c | 420 -------------- drivers/nfc/st21nfca/st21nfca_se.h | 63 --- 10 files changed, 2249 insertions(+), 2299 deletions(-) create mode 100644 drivers/nfc/st21nfca/core.c create mode 100644 drivers/nfc/st21nfca/dep.c create mode 100644 drivers/nfc/st21nfca/se.c delete mode 100644 drivers/nfc/st21nfca/st21nfca.c delete mode 100644 drivers/nfc/st21nfca/st21nfca_dep.c delete mode 100644 drivers/nfc/st21nfca/st21nfca_dep.h delete mode 100644 drivers/nfc/st21nfca/st21nfca_se.c delete mode 100644 drivers/nfc/st21nfca/st21nfca_se.h diff --git a/drivers/nfc/st21nfca/Makefile b/drivers/nfc/st21nfca/Makefile index 97edab4..82434c3 100644 --- a/drivers/nfc/st21nfca/Makefile +++ b/drivers/nfc/st21nfca/Makefile @@ -2,7 +2,7 @@ # Makefile for ST21NFCA HCI based NFC driver # -st21nfca_hci-objs = st21nfca.o st21nfca_dep.o st21nfca_se.o +st21nfca_hci-objs = core.o dep.o se.o obj-$(CONFIG_NFC_ST21NFCA) += st21nfca_hci.o st21nfca_i2c-objs = i2c.o diff --git a/drivers/nfc/st21nfca/core.c b/drivers/nfc/st21nfca/core.c new file mode 100644 index 0000000..42f1974 --- /dev/null +++ b/drivers/nfc/st21nfca/core.c @@ -0,0 +1,1062 @@ +/* + * 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" + +#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_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}, + + /* 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 != ST21NFCA_ESE_HOST_ID) { + pr_err("Unexpected apdu_reader pipe on host %x\n", + info->src_host_id); + kfree_skb(skb_pipe_info); + continue; + } + + 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; + hdev->pipes[st21nfca_gates[j].pipe].gate = + st21nfca_gates[j].gate; + hdev->pipes[st21nfca_gates[j].pipe].dest_host = + info->src_host_id; + } + kfree_skb(skb_pipe_info); + } + + /* + * 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) - 2; 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_list; + } + } + + memcpy(hdev->init_data.gates, st21nfca_gates, sizeof(st21nfca_gates)); +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 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_ese_present && + info->se_status->is_uicc_present) { + white_list[wl_size++] = NFC_HCI_UICC_HOST_ID; + white_list[wl_size++] = ST21NFCA_ESE_HOST_ID; + } else if (!info->se_status->is_ese_present && + info->se_status->is_uicc_present) { + white_list[wl_size++] = NFC_HCI_UICC_HOST_ID; + } else if (info->se_status->is_ese_present && + !info->se_status->is_uicc_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); + /* 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); + + *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; + } +} + +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; + } + 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); + 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) { + 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; + } + + 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); + + 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); diff --git a/drivers/nfc/st21nfca/dep.c b/drivers/nfc/st21nfca/dep.c new file mode 100644 index 0000000..c011712 --- /dev/null +++ b/drivers/nfc/st21nfca/dep.c @@ -0,0 +1,688 @@ +/* + * 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 <net/nfc/hci.h> + +#include "st21nfca.h" + +#define ST21NFCA_NFCIP1_INITIATOR 0x00 +#define ST21NFCA_NFCIP1_REQ 0xd4 +#define ST21NFCA_NFCIP1_RES 0xd5 +#define ST21NFCA_NFCIP1_ATR_REQ 0x00 +#define ST21NFCA_NFCIP1_ATR_RES 0x01 +#define ST21NFCA_NFCIP1_PSL_REQ 0x04 +#define ST21NFCA_NFCIP1_PSL_RES 0x05 +#define ST21NFCA_NFCIP1_DEP_REQ 0x06 +#define ST21NFCA_NFCIP1_DEP_RES 0x07 + +#define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) +#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) +#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ + ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) +#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) +#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) +#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10 + +#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ + ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) + +#define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00 +#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40 +#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 + +#define ST21NFCA_ATR_REQ_MIN_SIZE 17 +#define ST21NFCA_ATR_REQ_MAX_SIZE 65 +#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30 +#define ST21NFCA_GB_BIT 0x02 + +#define ST21NFCA_EVT_SEND_DATA 0x10 +#define ST21NFCA_EVT_FIELD_ON 0x11 +#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12 +#define ST21NFCA_EVT_CARD_ACTIVATED 0x13 +#define ST21NFCA_EVT_FIELD_OFF 0x14 + +#define ST21NFCA_EVT_CARD_F_BITRATE 0x16 +#define ST21NFCA_EVT_READER_F_BITRATE 0x13 +#define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38) +#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07) +#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4) +#define ST21NFCA_CARD_BITRATE_212 0x01 +#define ST21NFCA_CARD_BITRATE_424 0x02 + +#define ST21NFCA_DEFAULT_TIMEOUT 0x0a + + +#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \ + __LINE__, req) + +struct st21nfca_atr_req { + u8 length; + u8 cmd0; + u8 cmd1; + u8 nfcid3[NFC_NFCID3_MAXSIZE]; + u8 did; + u8 bsi; + u8 bri; + u8 ppi; + u8 gbi[0]; +} __packed; + +struct st21nfca_atr_res { + u8 length; + u8 cmd0; + u8 cmd1; + u8 nfcid3[NFC_NFCID3_MAXSIZE]; + u8 did; + u8 bsi; + u8 bri; + u8 to; + u8 ppi; + u8 gbi[0]; +} __packed; + +struct st21nfca_psl_req { + u8 length; + u8 cmd0; + u8 cmd1; + u8 did; + u8 brs; + u8 fsl; +} __packed; + +struct st21nfca_psl_res { + u8 length; + u8 cmd0; + u8 cmd1; + u8 did; +} __packed; + +struct st21nfca_dep_req_res { + u8 length; + u8 cmd0; + u8 cmd1; + u8 pfb; + u8 did; + u8 nad; +} __packed; + +static void st21nfca_tx_work(struct work_struct *work) +{ + struct st21nfca_hci_info *info = container_of(work, + struct st21nfca_hci_info, + dep_info.tx_work); + + struct nfc_dev *dev; + struct sk_buff *skb; + + if (info) { + dev = info->hdev->ndev; + skb = info->dep_info.tx_pending; + + device_lock(&dev->dev); + + nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, + ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, + info->async_cb, info); + device_unlock(&dev->dev); + kfree_skb(skb); + } +} + +static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, + struct sk_buff *skb) +{ + info->dep_info.tx_pending = skb; + schedule_work(&info->dep_info.tx_work); +} + +static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, + struct st21nfca_atr_req *atr_req) +{ + struct st21nfca_atr_res *atr_res; + struct sk_buff *skb; + size_t gb_len; + int r; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); + skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + skb_put(skb, sizeof(struct st21nfca_atr_res)); + + atr_res = (struct st21nfca_atr_res *)skb->data; + memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); + + atr_res->length = atr_req->length + 1; + atr_res->cmd0 = ST21NFCA_NFCIP1_RES; + atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; + + memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); + atr_res->bsi = 0x00; + atr_res->bri = 0x00; + atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; + atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; + + if (gb_len) { + skb_put(skb, gb_len); + + atr_res->ppi |= ST21NFCA_GB_BIT; + memcpy(atr_res->gbi, atr_req->gbi, gb_len); + r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, + gb_len); + if (r < 0) + return r; + } + + info->dep_info.curr_nfc_dep_pni = 0; + + r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, + ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); + kfree_skb(skb); + return r; +} + +static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, + struct sk_buff *skb) +{ + struct st21nfca_atr_req *atr_req; + size_t gb_len; + int r; + + skb_trim(skb, skb->len - 1); + + if (!skb->len) { + r = -EIO; + goto exit; + } + + if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) { + r = -EPROTO; + goto exit; + } + + atr_req = (struct st21nfca_atr_req *)skb->data; + + if (atr_req->length < sizeof(struct st21nfca_atr_req)) { + r = -EPROTO; + goto exit; + } + + r = st21nfca_tm_send_atr_res(hdev, atr_req); + if (r) + goto exit; + + gb_len = skb->len - sizeof(struct st21nfca_atr_req); + + r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, + NFC_COMM_PASSIVE, atr_req->gbi, gb_len); + if (r) + goto exit; + + r = 0; + +exit: + return r; +} + +static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, + struct st21nfca_psl_req *psl_req) +{ + struct st21nfca_psl_res *psl_res; + struct sk_buff *skb; + u8 bitrate[2] = {0, 0}; + int r; + + skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); + if (!skb) + return -ENOMEM; + skb_put(skb, sizeof(struct st21nfca_psl_res)); + + psl_res = (struct st21nfca_psl_res *)skb->data; + + psl_res->length = sizeof(struct st21nfca_psl_res); + psl_res->cmd0 = ST21NFCA_NFCIP1_RES; + psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; + psl_res->did = psl_req->did; + + r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, + ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); + if (r < 0) + goto error; + + /* + * ST21NFCA only support P2P passive. + * PSL_REQ BRS value != 0 has only a meaning to + * change technology to type F. + * We change to BITRATE 424Kbits. + * In other case switch to BITRATE 106Kbits. + */ + if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && + ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { + bitrate[0] = ST21NFCA_CARD_BITRATE_424; + bitrate[1] = ST21NFCA_CARD_BITRATE_424; + } + + /* Send an event to change bitrate change event to card f */ + r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, + ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); +error: + kfree_skb(skb); + return r; +} + +static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, + struct sk_buff *skb) +{ + struct st21nfca_psl_req *psl_req; + int r; + + skb_trim(skb, skb->len - 1); + + if (!skb->len) { + r = -EIO; + goto exit; + } + + psl_req = (struct st21nfca_psl_req *)skb->data; + + if (skb->len < sizeof(struct st21nfca_psl_req)) { + r = -EIO; + goto exit; + } + + r = st21nfca_tm_send_psl_res(hdev, psl_req); +exit: + return r; +} + +int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) +{ + int r; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; + *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; + *skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; + *skb_push(skb, 1) = skb->len; + + r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, + ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); + kfree_skb(skb); + + return r; +} +EXPORT_SYMBOL(st21nfca_tm_send_dep_res); + +static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, + struct sk_buff *skb) +{ + struct st21nfca_dep_req_res *dep_req; + u8 size; + int r; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + skb_trim(skb, skb->len - 1); + + size = 4; + + dep_req = (struct st21nfca_dep_req_res *)skb->data; + if (skb->len < size) { + r = -EIO; + goto exit; + } + + if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) + size++; + if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) + size++; + + if (skb->len < size) { + r = -EIO; + goto exit; + } + + /* Receiving DEP_REQ - Decoding */ + switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { + case ST21NFCA_NFC_DEP_PFB_I_PDU: + info->dep_info.curr_nfc_dep_pni = + ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); + break; + case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: + pr_err("Received a ACK/NACK PDU\n"); + break; + case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: + pr_err("Received a SUPERVISOR PDU\n"); + break; + } + + skb_pull(skb, size); + + return nfc_tm_data_received(hdev->ndev, skb); +exit: + return r; +} + +static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, + struct sk_buff *skb) +{ + u8 cmd0, cmd1; + int r; + + cmd0 = skb->data[1]; + switch (cmd0) { + case ST21NFCA_NFCIP1_REQ: + cmd1 = skb->data[2]; + switch (cmd1) { + case ST21NFCA_NFCIP1_ATR_REQ: + r = st21nfca_tm_recv_atr_req(hdev, skb); + break; + case ST21NFCA_NFCIP1_PSL_REQ: + r = st21nfca_tm_recv_psl_req(hdev, skb); + break; + case ST21NFCA_NFCIP1_DEP_REQ: + r = st21nfca_tm_recv_dep_req(hdev, skb); + break; + default: + return 1; + } + default: + return 1; + } + return r; +} + +/* + * Returns: + * <= 0: driver handled the event, skb consumed + * 1: driver does not handle the event, please do standard processing + */ +int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, + u8 event, struct sk_buff *skb) +{ + int r = 0; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + pr_debug("dep event: %d\n", event); + + switch (event) { + case ST21NFCA_EVT_CARD_ACTIVATED: + info->dep_info.curr_nfc_dep_pni = 0; + break; + case ST21NFCA_EVT_CARD_DEACTIVATED: + break; + case ST21NFCA_EVT_FIELD_ON: + break; + case ST21NFCA_EVT_FIELD_OFF: + break; + case ST21NFCA_EVT_SEND_DATA: + r = st21nfca_tm_event_send_data(hdev, skb); + if (r < 0) + return r; + return 0; + default: + return 1; + } + kfree_skb(skb); + return r; +} +EXPORT_SYMBOL(st21nfca_dep_event_received); + +static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, + u8 bri, u8 lri) +{ + struct sk_buff *skb; + struct st21nfca_psl_req *psl_req; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + skb = + alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); + if (!skb) + return; + skb_reserve(skb, 1); + + skb_put(skb, sizeof(struct st21nfca_psl_req)); + psl_req = (struct st21nfca_psl_req *) skb->data; + + psl_req->length = sizeof(struct st21nfca_psl_req); + psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; + psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; + psl_req->did = did; + psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); + psl_req->fsl = lri; + + *skb_push(skb, 1) = info->dep_info.to | 0x10; + + st21nfca_im_send_pdu(info, skb); +} + +#define ST21NFCA_CB_TYPE_READER_F 1 +static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, + int err) +{ + struct st21nfca_hci_info *info = context; + struct st21nfca_atr_res *atr_res; + int r; + + if (err != 0) + return; + + if (!skb) + return; + + switch (info->async_cb_type) { + case ST21NFCA_CB_TYPE_READER_F: + skb_trim(skb, skb->len - 1); + atr_res = (struct st21nfca_atr_res *)skb->data; + r = nfc_set_remote_general_bytes(info->hdev->ndev, + atr_res->gbi, + skb->len - sizeof(struct st21nfca_atr_res)); + if (r < 0) + return; + + if (atr_res->to >= 0x0e) + info->dep_info.to = 0x0e; + else + info->dep_info.to = atr_res->to + 1; + + info->dep_info.to |= 0x10; + + r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, + NFC_COMM_PASSIVE, NFC_RF_INITIATOR); + if (r < 0) + return; + + info->dep_info.curr_nfc_dep_pni = 0; + if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) + st21nfca_im_send_psl_req(info->hdev, atr_res->did, + atr_res->bsi, atr_res->bri, + ST21NFCA_PP2LRI(atr_res->ppi)); + break; + default: + kfree_skb(skb); + break; + } +} + +int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) +{ + struct sk_buff *skb; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + struct st21nfca_atr_req *atr_req; + struct nfc_target *target; + uint size; + + info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; + size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; + if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { + PROTOCOL_ERR("14.6.1.1"); + return -EINVAL; + } + + skb = + alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + skb_reserve(skb, 1); + + skb_put(skb, sizeof(struct st21nfca_atr_req)); + + atr_req = (struct st21nfca_atr_req *)skb->data; + memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); + + atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; + atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; + memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); + target = hdev->ndev->targets; + + if (target->sensf_res_len > 0) + memcpy(atr_req->nfcid3, target->sensf_res, + target->sensf_res_len); + else + get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); + + atr_req->did = 0x0; + + atr_req->bsi = 0x00; + atr_req->bri = 0x00; + atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; + if (gb_len) { + atr_req->ppi |= ST21NFCA_GB_BIT; + memcpy(skb_put(skb, gb_len), gb, gb_len); + } + atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; + + *skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ + + info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; + info->async_cb_context = info; + info->async_cb = st21nfca_im_recv_atr_res_cb; + info->dep_info.bri = atr_req->bri; + info->dep_info.bsi = atr_req->bsi; + info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); + + return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, + ST21NFCA_WR_XCHG_DATA, skb->data, + skb->len, info->async_cb, info); +} +EXPORT_SYMBOL(st21nfca_im_send_atr_req); + +static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, + int err) +{ + struct st21nfca_hci_info *info = context; + struct st21nfca_dep_req_res *dep_res; + + int size; + + if (err != 0) + return; + + if (!skb) + return; + + switch (info->async_cb_type) { + case ST21NFCA_CB_TYPE_READER_F: + dep_res = (struct st21nfca_dep_req_res *)skb->data; + + size = 3; + if (skb->len < size) + goto exit; + + if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) + size++; + if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) + size++; + + if (skb->len < size) + goto exit; + + skb_trim(skb, skb->len - 1); + + /* Receiving DEP_REQ - Decoding */ + switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { + case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: + pr_err("Received a ACK/NACK PDU\n"); + case ST21NFCA_NFC_DEP_PFB_I_PDU: + info->dep_info.curr_nfc_dep_pni = + ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); + size++; + skb_pull(skb, size); + nfc_tm_data_received(info->hdev->ndev, skb); + break; + case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: + pr_err("Received a SUPERVISOR PDU\n"); + skb_pull(skb, size); + *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; + *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; + *skb_push(skb, 1) = skb->len; + *skb_push(skb, 1) = info->dep_info.to | 0x10; + + st21nfca_im_send_pdu(info, skb); + break; + } + + return; + default: + break; + } + +exit: + kfree_skb(skb); +} + +int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; + info->async_cb_context = info; + info->async_cb = st21nfca_im_recv_dep_res_cb; + + *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; + *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; + *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; + *skb_push(skb, 1) = skb->len; + + *skb_push(skb, 1) = info->dep_info.to | 0x10; + + return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, + ST21NFCA_WR_XCHG_DATA, + skb->data, skb->len, + info->async_cb, info); +} +EXPORT_SYMBOL(st21nfca_im_send_dep_req); + +void st21nfca_dep_init(struct nfc_hci_dev *hdev) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); + info->dep_info.curr_nfc_dep_pni = 0; + info->dep_info.idx = 0; + info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; +} +EXPORT_SYMBOL(st21nfca_dep_init); + +void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + cancel_work_sync(&info->dep_info.tx_work); +} +EXPORT_SYMBOL(st21nfca_dep_deinit); diff --git a/drivers/nfc/st21nfca/se.c b/drivers/nfc/st21nfca/se.c new file mode 100644 index 0000000..6aa4e34 --- /dev/null +++ b/drivers/nfc/st21nfca/se.c @@ -0,0 +1,419 @@ +/* + * 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 <net/nfc/hci.h> + +#include "st21nfca.h" + +#define ST21NFCA_EVT_UICC_ACTIVATE 0x10 +#define ST21NFCA_EVT_UICC_DEACTIVATE 0x13 +#define ST21NFCA_EVT_SE_HARD_RESET 0x20 +#define ST21NFCA_EVT_SE_SOFT_RESET 0x11 +#define ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER 0x21 +#define ST21NFCA_EVT_SE_ACTIVATE 0x22 +#define ST21NFCA_EVT_SE_DEACTIVATE 0x23 + +#define ST21NFCA_EVT_TRANSMIT_DATA 0x10 +#define ST21NFCA_EVT_WTX_REQUEST 0x11 + +#define ST21NFCA_EVT_CONNECTIVITY 0x10 +#define ST21NFCA_EVT_TRANSACTION 0x12 + +#define ST21NFCA_ESE_HOST_ID 0xc0 + +#define ST21NFCA_SE_TO_HOT_PLUG 1000 +/* Connectivity pipe only */ +#define ST21NFCA_SE_COUNT_PIPE_UICC 0x01 +/* Connectivity + APDU Reader pipe */ +#define ST21NFCA_SE_COUNT_PIPE_EMBEDDED 0x02 + +#define ST21NFCA_SE_MODE_OFF 0x00 +#define ST21NFCA_SE_MODE_ON 0x01 + +#define ST21NFCA_PARAM_ATR 0x01 +#define ST21NFCA_ATR_DEFAULT_BWI 0x04 + +/* + * WT = 2^BWI/10[s], convert into msecs and add a secure + * room by increasing by 2 this timeout + */ +#define ST21NFCA_BWI_TO_TIMEOUT(x) ((1 << x) * 200) +#define ST21NFCA_ATR_GET_Y_FROM_TD(x) (x >> 4) + +/* If TA is present bit 0 is set */ +#define ST21NFCA_ATR_TA_PRESENT(x) (x & 0x01) +/* If TB is present bit 1 is set */ +#define ST21NFCA_ATR_TB_PRESENT(x) (x & 0x02) + +static u8 st21nfca_se_get_bwi(struct nfc_hci_dev *hdev) +{ + int i; + u8 td; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + /* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */ + for (i = 1; i < ST21NFCA_ESE_MAX_LENGTH; i++) { + td = ST21NFCA_ATR_GET_Y_FROM_TD(info->se_info.atr[i]); + if (ST21NFCA_ATR_TA_PRESENT(td)) + i++; + if (ST21NFCA_ATR_TB_PRESENT(td)) { + i++; + return info->se_info.atr[i] >> 4; + } + } + return ST21NFCA_ATR_DEFAULT_BWI; +} + +static void st21nfca_se_get_atr(struct nfc_hci_dev *hdev) +{ + int r; + struct sk_buff *skb; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + r = nfc_hci_get_param(hdev, ST21NFCA_APDU_READER_GATE, + ST21NFCA_PARAM_ATR, &skb); + if (r < 0) + return; + + if (skb->len <= ST21NFCA_ESE_MAX_LENGTH) { + memcpy(info->se_info.atr, skb->data, skb->len); + info->se_info.wt_timeout = + ST21NFCA_BWI_TO_TIMEOUT(st21nfca_se_get_bwi(hdev)); + } + kfree_skb(skb); +} + +static int st21nfca_hci_control_se(struct nfc_hci_dev *hdev, u32 se_idx, + u8 state) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + int r; + struct sk_buff *sk_host_list; + u8 se_event, host_id; + + switch (se_idx) { + case NFC_HCI_UICC_HOST_ID: + se_event = (state == ST21NFCA_SE_MODE_ON ? + ST21NFCA_EVT_UICC_ACTIVATE : + ST21NFCA_EVT_UICC_DEACTIVATE); + + info->se_info.count_pipes = 0; + info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_UICC; + break; + case ST21NFCA_ESE_HOST_ID: + se_event = (state == ST21NFCA_SE_MODE_ON ? + ST21NFCA_EVT_SE_ACTIVATE : + ST21NFCA_EVT_SE_DEACTIVATE); + + info->se_info.count_pipes = 0; + info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_EMBEDDED; + break; + default: + return -EINVAL; + } + + /* + * Wait for an EVT_HOT_PLUG in order to + * retrieve a relevant host list. + */ + reinit_completion(&info->se_info.req_completion); + r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE, se_event, + NULL, 0); + if (r < 0) + return r; + + mod_timer(&info->se_info.se_active_timer, jiffies + + msecs_to_jiffies(ST21NFCA_SE_TO_HOT_PLUG)); + info->se_info.se_active = true; + + /* Ignore return value and check in any case the host_list */ + wait_for_completion_interruptible(&info->se_info.req_completion); + + r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE, + NFC_HCI_ADMIN_HOST_LIST, + &sk_host_list); + if (r < 0) + return r; + + host_id = sk_host_list->data[sk_host_list->len - 1]; + kfree_skb(sk_host_list); + + if (state == ST21NFCA_SE_MODE_ON && host_id == se_idx) + return se_idx; + else if (state == ST21NFCA_SE_MODE_OFF && host_id != se_idx) + return se_idx; + + return -1; +} + +int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + int se_count = 0; + + if (info->se_status->is_uicc_present) { + nfc_add_se(hdev->ndev, NFC_HCI_UICC_HOST_ID, NFC_SE_UICC); + se_count++; + } + + if (info->se_status->is_ese_present) { + nfc_add_se(hdev->ndev, ST21NFCA_ESE_HOST_ID, NFC_SE_EMBEDDED); + se_count++; + } + + return !se_count; +} +EXPORT_SYMBOL(st21nfca_hci_discover_se); + +int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx) +{ + int r; + + /* + * According to upper layer, se_idx == NFC_SE_UICC when + * info->se_status->is_uicc_enable is true should never happen. + * Same for eSE. + */ + r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_ON); + + if (r == ST21NFCA_ESE_HOST_ID) { + st21nfca_se_get_atr(hdev); + r = nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE, + ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0); + if (r < 0) + return r; + } else if (r < 0) { + /* + * The activation tentative failed, the secure element + * is not connected. Remove from the list. + */ + nfc_remove_se(hdev->ndev, se_idx); + return r; + } + + return 0; +} +EXPORT_SYMBOL(st21nfca_hci_enable_se); + +int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx) +{ + int r; + + /* + * According to upper layer, se_idx == NFC_SE_UICC when + * info->se_status->is_uicc_enable is true should never happen + * Same for eSE. + */ + r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_OFF); + if (r < 0) + return r; + + return 0; +} +EXPORT_SYMBOL(st21nfca_hci_disable_se); + +int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx, + u8 *apdu, size_t apdu_length, + se_io_cb_t cb, void *cb_context) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + pr_debug("se_io %x\n", se_idx); + + switch (se_idx) { + case ST21NFCA_ESE_HOST_ID: + info->se_info.cb = cb; + info->se_info.cb_context = cb_context; + mod_timer(&info->se_info.bwi_timer, jiffies + + msecs_to_jiffies(info->se_info.wt_timeout)); + info->se_info.bwi_active = true; + return nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE, + ST21NFCA_EVT_TRANSMIT_DATA, + apdu, apdu_length); + default: + return -ENODEV; + } +} +EXPORT_SYMBOL(st21nfca_hci_se_io); + +static void st21nfca_se_wt_timeout(unsigned long data) +{ + /* + * No answer from the secure element + * within the defined timeout. + * Let's send a reset request as recovery procedure. + * According to the situation, we first try to send a software reset + * to the secure element. If the next command is still not + * answering in time, we send to the CLF a secure element hardware + * reset request. + */ + /* hardware reset managed through VCC_UICC_OUT power supply */ + u8 param = 0x01; + struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data; + + pr_debug("\n"); + + info->se_info.bwi_active = false; + + if (!info->se_info.xch_error) { + info->se_info.xch_error = true; + nfc_hci_send_event(info->hdev, ST21NFCA_APDU_READER_GATE, + ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0); + } else { + info->se_info.xch_error = false; + nfc_hci_send_event(info->hdev, ST21NFCA_DEVICE_MGNT_GATE, + ST21NFCA_EVT_SE_HARD_RESET, ¶m, 1); + } + info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME); +} + +static void st21nfca_se_activation_timeout(unsigned long data) +{ + struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data; + + pr_debug("\n"); + + info->se_info.se_active = false; + + complete(&info->se_info.req_completion); +} + +/* + * Returns: + * <= 0: driver handled the event, skb consumed + * 1: driver does not handle the event, please do standard processing + */ +int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, + u8 event, struct sk_buff *skb) +{ + int r = 0; + struct device *dev = &hdev->ndev->dev; + struct nfc_evt_transaction *transaction; + + pr_debug("connectivity gate event: %x\n", event); + + switch (event) { + case ST21NFCA_EVT_CONNECTIVITY: + break; + case ST21NFCA_EVT_TRANSACTION: + /* + * According to specification etsi 102 622 + * 11.2.2.4 EVT_TRANSACTION Table 52 + * Description Tag Length + * AID 81 5 to 16 + * PARAMETERS 82 0 to 255 + */ + if (skb->len < NFC_MIN_AID_LENGTH + 2 && + skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG) + return -EPROTO; + + transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev, + skb->len - 2, GFP_KERNEL); + + transaction->aid_len = skb->data[1]; + memcpy(transaction->aid, &skb->data[2], + transaction->aid_len); + + /* Check next byte is PARAMETERS tag (82) */ + if (skb->data[transaction->aid_len + 2] != + NFC_EVT_TRANSACTION_PARAMS_TAG) + return -EPROTO; + + transaction->params_len = skb->data[transaction->aid_len + 3]; + memcpy(transaction->params, skb->data + + transaction->aid_len + 4, transaction->params_len); + + r = nfc_se_transaction(hdev->ndev, host, transaction); + break; + default: + return 1; + } + kfree_skb(skb); + return r; +} +EXPORT_SYMBOL(st21nfca_connectivity_event_received); + +int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev, + u8 event, struct sk_buff *skb) +{ + int r = 0; + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + pr_debug("apdu reader gate event: %x\n", event); + + switch (event) { + case ST21NFCA_EVT_TRANSMIT_DATA: + del_timer_sync(&info->se_info.bwi_timer); + info->se_info.bwi_active = false; + r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE, + ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER, NULL, 0); + if (r < 0) + goto exit; + + info->se_info.cb(info->se_info.cb_context, + skb->data, skb->len, 0); + break; + case ST21NFCA_EVT_WTX_REQUEST: + mod_timer(&info->se_info.bwi_timer, jiffies + + msecs_to_jiffies(info->se_info.wt_timeout)); + break; + } + +exit: + kfree_skb(skb); + return r; +} +EXPORT_SYMBOL(st21nfca_apdu_reader_event_received); + +void st21nfca_se_init(struct nfc_hci_dev *hdev) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + init_completion(&info->se_info.req_completion); + /* initialize timers */ + init_timer(&info->se_info.bwi_timer); + info->se_info.bwi_timer.data = (unsigned long)info; + info->se_info.bwi_timer.function = st21nfca_se_wt_timeout; + info->se_info.bwi_active = false; + + init_timer(&info->se_info.se_active_timer); + info->se_info.se_active_timer.data = (unsigned long)info; + info->se_info.se_active_timer.function = st21nfca_se_activation_timeout; + info->se_info.se_active = false; + + info->se_info.count_pipes = 0; + info->se_info.expected_pipes = 0; + + info->se_info.xch_error = false; + + info->se_info.wt_timeout = + ST21NFCA_BWI_TO_TIMEOUT(ST21NFCA_ATR_DEFAULT_BWI); +} +EXPORT_SYMBOL(st21nfca_se_init); + +void st21nfca_se_deinit(struct nfc_hci_dev *hdev) +{ + struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); + + if (info->se_info.bwi_active) + del_timer_sync(&info->se_info.bwi_timer); + if (info->se_info.se_active) + del_timer_sync(&info->se_info.se_active_timer); + + info->se_info.bwi_active = false; + info->se_info.se_active = false; +} +EXPORT_SYMBOL(st21nfca_se_deinit); diff --git a/drivers/nfc/st21nfca/st21nfca.c b/drivers/nfc/st21nfca/st21nfca.c deleted file mode 100644 index 0512865..0000000 --- a/drivers/nfc/st21nfca/st21nfca.c +++ /dev/null @@ -1,1064 +0,0 @@ -/* - * 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" -#include "st21nfca_se.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_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}, - - /* 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 != ST21NFCA_ESE_HOST_ID) { - pr_err("Unexpected apdu_reader pipe on host %x\n", - info->src_host_id); - kfree_skb(skb_pipe_info); - continue; - } - - 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; - hdev->pipes[st21nfca_gates[j].pipe].gate = - st21nfca_gates[j].gate; - hdev->pipes[st21nfca_gates[j].pipe].dest_host = - info->src_host_id; - } - kfree_skb(skb_pipe_info); - } - - /* - * 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) - 2; 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_list; - } - } - - memcpy(hdev->init_data.gates, st21nfca_gates, sizeof(st21nfca_gates)); -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 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_ese_present && - info->se_status->is_uicc_present) { - white_list[wl_size++] = NFC_HCI_UICC_HOST_ID; - white_list[wl_size++] = ST21NFCA_ESE_HOST_ID; - } else if (!info->se_status->is_ese_present && - info->se_status->is_uicc_present) { - white_list[wl_size++] = NFC_HCI_UICC_HOST_ID; - } else if (info->se_status->is_ese_present && - !info->se_status->is_uicc_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); - /* 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); - - *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; - } -} - -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; - } - 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); - 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) { - 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; - } - - 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); - - 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); diff --git a/drivers/nfc/st21nfca/st21nfca.h b/drivers/nfc/st21nfca/st21nfca.h index 15a78d3..70e2d43 100644 --- a/drivers/nfc/st21nfca/st21nfca.h +++ b/drivers/nfc/st21nfca/st21nfca.h @@ -18,9 +18,8 @@ #define __LOCAL_ST21NFCA_H_ #include <net/nfc/hci.h> - -#include "st21nfca_dep.h" -#include "st21nfca_se.h" +#include <linux/skbuff.h> +#include <linux/workqueue.h> #define HCI_MODE 0 @@ -46,28 +45,68 @@ #define ST21NFCA_HCI_LLC_MAX_SIZE (ST21NFCA_HCI_LLC_LEN_CRC + 1 + \ ST21NFCA_HCI_LLC_MAX_PAYLOAD) -#define DRIVER_DESC "HCI NFC driver for ST21NFCA" +/* Reader RF commands */ +#define ST21NFCA_WR_XCHG_DATA 0x10 + +#define ST21NFCA_DEVICE_MGNT_GATE 0x01 +#define ST21NFCA_RF_READER_F_GATE 0x14 +#define ST21NFCA_RF_CARD_F_GATE 0x24 +#define ST21NFCA_APDU_READER_GATE 0xf0 +#define ST21NFCA_CONNECTIVITY_GATE 0x41 -#define ST21NFCA_HCI_MODE 0 +/* + * ref ISO7816-3 chap 8.1. the initial character TS is followed by a + * sequence of at most 32 characters. + */ +#define ST21NFCA_ESE_MAX_LENGTH 33 +#define ST21NFCA_ESE_HOST_ID 0xc0 + +#define DRIVER_DESC "HCI NFC driver for ST21NFCA" -#define ST21NFCA_NUM_DEVICES 256 +#define ST21NFCA_HCI_MODE 0 +#define ST21NFCA_NUM_DEVICES 256 struct st21nfca_se_status { bool is_ese_present; bool is_uicc_present; }; -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); -void st21nfca_hci_remove(struct nfc_hci_dev *hdev); - enum st21nfca_state { ST21NFCA_ST_COLD, ST21NFCA_ST_READY, }; +struct st21nfca_dep_info { + struct sk_buff *tx_pending; + struct work_struct tx_work; + u8 curr_nfc_dep_pni; + u32 idx; + u8 to; + u8 did; + u8 bsi; + u8 bri; + u8 lri; +} __packed; + +struct st21nfca_se_info { + u8 atr[ST21NFCA_ESE_MAX_LENGTH]; + struct completion req_completion; + + struct timer_list bwi_timer; + int wt_timeout; /* in msecs */ + bool bwi_active; + + struct timer_list se_active_timer; + bool se_active; + int expected_pipes; + int count_pipes; + + bool xch_error; + + se_io_cb_t cb; + void *cb_context; +}; + struct st21nfca_hci_info { struct nfc_phy_ops *phy_ops; void *phy_id; @@ -87,13 +126,34 @@ struct st21nfca_hci_info { struct st21nfca_se_info se_info; }; -/* Reader RF commands */ -#define ST21NFCA_WR_XCHG_DATA 0x10 +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); +void st21nfca_hci_remove(struct nfc_hci_dev *hdev); -#define ST21NFCA_DEVICE_MGNT_GATE 0x01 -#define ST21NFCA_RF_READER_F_GATE 0x14 -#define ST21NFCA_RF_CARD_F_GATE 0x24 -#define ST21NFCA_APDU_READER_GATE 0xf0 -#define ST21NFCA_CONNECTIVITY_GATE 0x41 +int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, + u8 event, struct sk_buff *skb); +int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb); + +int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len); +int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb); +void st21nfca_dep_init(struct nfc_hci_dev *hdev); +void st21nfca_dep_deinit(struct nfc_hci_dev *hdev); + +int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, + u8 event, struct sk_buff *skb); +int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev, + u8 event, struct sk_buff *skb); + +int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev); +int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx); +int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx); +int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx, + u8 *apdu, size_t apdu_length, + se_io_cb_t cb, void *cb_context); + +void st21nfca_se_init(struct nfc_hci_dev *hdev); +void st21nfca_se_deinit(struct nfc_hci_dev *hdev); #endif /* __LOCAL_ST21NFCA_H_ */ diff --git a/drivers/nfc/st21nfca/st21nfca_dep.c b/drivers/nfc/st21nfca/st21nfca_dep.c deleted file mode 100644 index 8882181..0000000 --- a/drivers/nfc/st21nfca/st21nfca_dep.c +++ /dev/null @@ -1,689 +0,0 @@ -/* - * 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 <net/nfc/hci.h> - -#include "st21nfca.h" -#include "st21nfca_dep.h" - -#define ST21NFCA_NFCIP1_INITIATOR 0x00 -#define ST21NFCA_NFCIP1_REQ 0xd4 -#define ST21NFCA_NFCIP1_RES 0xd5 -#define ST21NFCA_NFCIP1_ATR_REQ 0x00 -#define ST21NFCA_NFCIP1_ATR_RES 0x01 -#define ST21NFCA_NFCIP1_PSL_REQ 0x04 -#define ST21NFCA_NFCIP1_PSL_RES 0x05 -#define ST21NFCA_NFCIP1_DEP_REQ 0x06 -#define ST21NFCA_NFCIP1_DEP_RES 0x07 - -#define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) -#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) -#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ - ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) -#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) -#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) -#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10 - -#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ - ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) - -#define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00 -#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40 -#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 - -#define ST21NFCA_ATR_REQ_MIN_SIZE 17 -#define ST21NFCA_ATR_REQ_MAX_SIZE 65 -#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30 -#define ST21NFCA_GB_BIT 0x02 - -#define ST21NFCA_EVT_SEND_DATA 0x10 -#define ST21NFCA_EVT_FIELD_ON 0x11 -#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12 -#define ST21NFCA_EVT_CARD_ACTIVATED 0x13 -#define ST21NFCA_EVT_FIELD_OFF 0x14 - -#define ST21NFCA_EVT_CARD_F_BITRATE 0x16 -#define ST21NFCA_EVT_READER_F_BITRATE 0x13 -#define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38) -#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07) -#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4) -#define ST21NFCA_CARD_BITRATE_212 0x01 -#define ST21NFCA_CARD_BITRATE_424 0x02 - -#define ST21NFCA_DEFAULT_TIMEOUT 0x0a - - -#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \ - __LINE__, req) - -struct st21nfca_atr_req { - u8 length; - u8 cmd0; - u8 cmd1; - u8 nfcid3[NFC_NFCID3_MAXSIZE]; - u8 did; - u8 bsi; - u8 bri; - u8 ppi; - u8 gbi[0]; -} __packed; - -struct st21nfca_atr_res { - u8 length; - u8 cmd0; - u8 cmd1; - u8 nfcid3[NFC_NFCID3_MAXSIZE]; - u8 did; - u8 bsi; - u8 bri; - u8 to; - u8 ppi; - u8 gbi[0]; -} __packed; - -struct st21nfca_psl_req { - u8 length; - u8 cmd0; - u8 cmd1; - u8 did; - u8 brs; - u8 fsl; -} __packed; - -struct st21nfca_psl_res { - u8 length; - u8 cmd0; - u8 cmd1; - u8 did; -} __packed; - -struct st21nfca_dep_req_res { - u8 length; - u8 cmd0; - u8 cmd1; - u8 pfb; - u8 did; - u8 nad; -} __packed; - -static void st21nfca_tx_work(struct work_struct *work) -{ - struct st21nfca_hci_info *info = container_of(work, - struct st21nfca_hci_info, - dep_info.tx_work); - - struct nfc_dev *dev; - struct sk_buff *skb; - - if (info) { - dev = info->hdev->ndev; - skb = info->dep_info.tx_pending; - - device_lock(&dev->dev); - - nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, - ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, - info->async_cb, info); - device_unlock(&dev->dev); - kfree_skb(skb); - } -} - -static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, - struct sk_buff *skb) -{ - info->dep_info.tx_pending = skb; - schedule_work(&info->dep_info.tx_work); -} - -static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, - struct st21nfca_atr_req *atr_req) -{ - struct st21nfca_atr_res *atr_res; - struct sk_buff *skb; - size_t gb_len; - int r; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); - skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); - if (!skb) - return -ENOMEM; - - skb_put(skb, sizeof(struct st21nfca_atr_res)); - - atr_res = (struct st21nfca_atr_res *)skb->data; - memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); - - atr_res->length = atr_req->length + 1; - atr_res->cmd0 = ST21NFCA_NFCIP1_RES; - atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; - - memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); - atr_res->bsi = 0x00; - atr_res->bri = 0x00; - atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; - atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; - - if (gb_len) { - skb_put(skb, gb_len); - - atr_res->ppi |= ST21NFCA_GB_BIT; - memcpy(atr_res->gbi, atr_req->gbi, gb_len); - r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, - gb_len); - if (r < 0) - return r; - } - - info->dep_info.curr_nfc_dep_pni = 0; - - r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, - ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); - kfree_skb(skb); - return r; -} - -static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, - struct sk_buff *skb) -{ - struct st21nfca_atr_req *atr_req; - size_t gb_len; - int r; - - skb_trim(skb, skb->len - 1); - - if (!skb->len) { - r = -EIO; - goto exit; - } - - if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) { - r = -EPROTO; - goto exit; - } - - atr_req = (struct st21nfca_atr_req *)skb->data; - - if (atr_req->length < sizeof(struct st21nfca_atr_req)) { - r = -EPROTO; - goto exit; - } - - r = st21nfca_tm_send_atr_res(hdev, atr_req); - if (r) - goto exit; - - gb_len = skb->len - sizeof(struct st21nfca_atr_req); - - r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, - NFC_COMM_PASSIVE, atr_req->gbi, gb_len); - if (r) - goto exit; - - r = 0; - -exit: - return r; -} - -static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, - struct st21nfca_psl_req *psl_req) -{ - struct st21nfca_psl_res *psl_res; - struct sk_buff *skb; - u8 bitrate[2] = {0, 0}; - int r; - - skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); - if (!skb) - return -ENOMEM; - skb_put(skb, sizeof(struct st21nfca_psl_res)); - - psl_res = (struct st21nfca_psl_res *)skb->data; - - psl_res->length = sizeof(struct st21nfca_psl_res); - psl_res->cmd0 = ST21NFCA_NFCIP1_RES; - psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; - psl_res->did = psl_req->did; - - r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, - ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); - if (r < 0) - goto error; - - /* - * ST21NFCA only support P2P passive. - * PSL_REQ BRS value != 0 has only a meaning to - * change technology to type F. - * We change to BITRATE 424Kbits. - * In other case switch to BITRATE 106Kbits. - */ - if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && - ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { - bitrate[0] = ST21NFCA_CARD_BITRATE_424; - bitrate[1] = ST21NFCA_CARD_BITRATE_424; - } - - /* Send an event to change bitrate change event to card f */ - r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, - ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); -error: - kfree_skb(skb); - return r; -} - -static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, - struct sk_buff *skb) -{ - struct st21nfca_psl_req *psl_req; - int r; - - skb_trim(skb, skb->len - 1); - - if (!skb->len) { - r = -EIO; - goto exit; - } - - psl_req = (struct st21nfca_psl_req *)skb->data; - - if (skb->len < sizeof(struct st21nfca_psl_req)) { - r = -EIO; - goto exit; - } - - r = st21nfca_tm_send_psl_res(hdev, psl_req); -exit: - return r; -} - -int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) -{ - int r; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; - *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; - *skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; - *skb_push(skb, 1) = skb->len; - - r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, - ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); - kfree_skb(skb); - - return r; -} -EXPORT_SYMBOL(st21nfca_tm_send_dep_res); - -static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, - struct sk_buff *skb) -{ - struct st21nfca_dep_req_res *dep_req; - u8 size; - int r; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - skb_trim(skb, skb->len - 1); - - size = 4; - - dep_req = (struct st21nfca_dep_req_res *)skb->data; - if (skb->len < size) { - r = -EIO; - goto exit; - } - - if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) - size++; - if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) - size++; - - if (skb->len < size) { - r = -EIO; - goto exit; - } - - /* Receiving DEP_REQ - Decoding */ - switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { - case ST21NFCA_NFC_DEP_PFB_I_PDU: - info->dep_info.curr_nfc_dep_pni = - ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); - break; - case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: - pr_err("Received a ACK/NACK PDU\n"); - break; - case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: - pr_err("Received a SUPERVISOR PDU\n"); - break; - } - - skb_pull(skb, size); - - return nfc_tm_data_received(hdev->ndev, skb); -exit: - return r; -} - -static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, - struct sk_buff *skb) -{ - u8 cmd0, cmd1; - int r; - - cmd0 = skb->data[1]; - switch (cmd0) { - case ST21NFCA_NFCIP1_REQ: - cmd1 = skb->data[2]; - switch (cmd1) { - case ST21NFCA_NFCIP1_ATR_REQ: - r = st21nfca_tm_recv_atr_req(hdev, skb); - break; - case ST21NFCA_NFCIP1_PSL_REQ: - r = st21nfca_tm_recv_psl_req(hdev, skb); - break; - case ST21NFCA_NFCIP1_DEP_REQ: - r = st21nfca_tm_recv_dep_req(hdev, skb); - break; - default: - return 1; - } - default: - return 1; - } - return r; -} - -/* - * Returns: - * <= 0: driver handled the event, skb consumed - * 1: driver does not handle the event, please do standard processing - */ -int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, - u8 event, struct sk_buff *skb) -{ - int r = 0; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - pr_debug("dep event: %d\n", event); - - switch (event) { - case ST21NFCA_EVT_CARD_ACTIVATED: - info->dep_info.curr_nfc_dep_pni = 0; - break; - case ST21NFCA_EVT_CARD_DEACTIVATED: - break; - case ST21NFCA_EVT_FIELD_ON: - break; - case ST21NFCA_EVT_FIELD_OFF: - break; - case ST21NFCA_EVT_SEND_DATA: - r = st21nfca_tm_event_send_data(hdev, skb); - if (r < 0) - return r; - return 0; - default: - return 1; - } - kfree_skb(skb); - return r; -} -EXPORT_SYMBOL(st21nfca_dep_event_received); - -static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, - u8 bri, u8 lri) -{ - struct sk_buff *skb; - struct st21nfca_psl_req *psl_req; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - skb = - alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); - if (!skb) - return; - skb_reserve(skb, 1); - - skb_put(skb, sizeof(struct st21nfca_psl_req)); - psl_req = (struct st21nfca_psl_req *) skb->data; - - psl_req->length = sizeof(struct st21nfca_psl_req); - psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; - psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; - psl_req->did = did; - psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); - psl_req->fsl = lri; - - *skb_push(skb, 1) = info->dep_info.to | 0x10; - - st21nfca_im_send_pdu(info, skb); -} - -#define ST21NFCA_CB_TYPE_READER_F 1 -static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, - int err) -{ - struct st21nfca_hci_info *info = context; - struct st21nfca_atr_res *atr_res; - int r; - - if (err != 0) - return; - - if (!skb) - return; - - switch (info->async_cb_type) { - case ST21NFCA_CB_TYPE_READER_F: - skb_trim(skb, skb->len - 1); - atr_res = (struct st21nfca_atr_res *)skb->data; - r = nfc_set_remote_general_bytes(info->hdev->ndev, - atr_res->gbi, - skb->len - sizeof(struct st21nfca_atr_res)); - if (r < 0) - return; - - if (atr_res->to >= 0x0e) - info->dep_info.to = 0x0e; - else - info->dep_info.to = atr_res->to + 1; - - info->dep_info.to |= 0x10; - - r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, - NFC_COMM_PASSIVE, NFC_RF_INITIATOR); - if (r < 0) - return; - - info->dep_info.curr_nfc_dep_pni = 0; - if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) - st21nfca_im_send_psl_req(info->hdev, atr_res->did, - atr_res->bsi, atr_res->bri, - ST21NFCA_PP2LRI(atr_res->ppi)); - break; - default: - kfree_skb(skb); - break; - } -} - -int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) -{ - struct sk_buff *skb; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - struct st21nfca_atr_req *atr_req; - struct nfc_target *target; - uint size; - - info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; - size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; - if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { - PROTOCOL_ERR("14.6.1.1"); - return -EINVAL; - } - - skb = - alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); - if (!skb) - return -ENOMEM; - - skb_reserve(skb, 1); - - skb_put(skb, sizeof(struct st21nfca_atr_req)); - - atr_req = (struct st21nfca_atr_req *)skb->data; - memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); - - atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; - atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; - memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); - target = hdev->ndev->targets; - - if (target->sensf_res_len > 0) - memcpy(atr_req->nfcid3, target->sensf_res, - target->sensf_res_len); - else - get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); - - atr_req->did = 0x0; - - atr_req->bsi = 0x00; - atr_req->bri = 0x00; - atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; - if (gb_len) { - atr_req->ppi |= ST21NFCA_GB_BIT; - memcpy(skb_put(skb, gb_len), gb, gb_len); - } - atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; - - *skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ - - info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; - info->async_cb_context = info; - info->async_cb = st21nfca_im_recv_atr_res_cb; - info->dep_info.bri = atr_req->bri; - info->dep_info.bsi = atr_req->bsi; - info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); - - return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, - ST21NFCA_WR_XCHG_DATA, skb->data, - skb->len, info->async_cb, info); -} -EXPORT_SYMBOL(st21nfca_im_send_atr_req); - -static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, - int err) -{ - struct st21nfca_hci_info *info = context; - struct st21nfca_dep_req_res *dep_res; - - int size; - - if (err != 0) - return; - - if (!skb) - return; - - switch (info->async_cb_type) { - case ST21NFCA_CB_TYPE_READER_F: - dep_res = (struct st21nfca_dep_req_res *)skb->data; - - size = 3; - if (skb->len < size) - goto exit; - - if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) - size++; - if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) - size++; - - if (skb->len < size) - goto exit; - - skb_trim(skb, skb->len - 1); - - /* Receiving DEP_REQ - Decoding */ - switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { - case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: - pr_err("Received a ACK/NACK PDU\n"); - case ST21NFCA_NFC_DEP_PFB_I_PDU: - info->dep_info.curr_nfc_dep_pni = - ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); - size++; - skb_pull(skb, size); - nfc_tm_data_received(info->hdev->ndev, skb); - break; - case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: - pr_err("Received a SUPERVISOR PDU\n"); - skb_pull(skb, size); - *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; - *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; - *skb_push(skb, 1) = skb->len; - *skb_push(skb, 1) = info->dep_info.to | 0x10; - - st21nfca_im_send_pdu(info, skb); - break; - } - - return; - default: - break; - } - -exit: - kfree_skb(skb); -} - -int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; - info->async_cb_context = info; - info->async_cb = st21nfca_im_recv_dep_res_cb; - - *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; - *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; - *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; - *skb_push(skb, 1) = skb->len; - - *skb_push(skb, 1) = info->dep_info.to | 0x10; - - return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, - ST21NFCA_WR_XCHG_DATA, - skb->data, skb->len, - info->async_cb, info); -} -EXPORT_SYMBOL(st21nfca_im_send_dep_req); - -void st21nfca_dep_init(struct nfc_hci_dev *hdev) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); - info->dep_info.curr_nfc_dep_pni = 0; - info->dep_info.idx = 0; - info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; -} -EXPORT_SYMBOL(st21nfca_dep_init); - -void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - cancel_work_sync(&info->dep_info.tx_work); -} -EXPORT_SYMBOL(st21nfca_dep_deinit); diff --git a/drivers/nfc/st21nfca/st21nfca_dep.h b/drivers/nfc/st21nfca/st21nfca_dep.h deleted file mode 100644 index baf4664..0000000 --- a/drivers/nfc/st21nfca/st21nfca_dep.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * 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/>. - */ - -#ifndef __ST21NFCA_DEP_H -#define __ST21NFCA_DEP_H - -#include <linux/skbuff.h> -#include <linux/workqueue.h> - -struct st21nfca_dep_info { - struct sk_buff *tx_pending; - struct work_struct tx_work; - u8 curr_nfc_dep_pni; - u32 idx; - u8 to; - u8 did; - u8 bsi; - u8 bri; - u8 lri; -} __packed; - -int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, - u8 event, struct sk_buff *skb); -int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb); - -int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len); -int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb); -void st21nfca_dep_init(struct nfc_hci_dev *hdev); -void st21nfca_dep_deinit(struct nfc_hci_dev *hdev); -#endif /* __ST21NFCA_DEP_H */ diff --git a/drivers/nfc/st21nfca/st21nfca_se.c b/drivers/nfc/st21nfca/st21nfca_se.c deleted file mode 100644 index 3197e9b..0000000 --- a/drivers/nfc/st21nfca/st21nfca_se.c +++ /dev/null @@ -1,420 +0,0 @@ -/* - * 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 <net/nfc/hci.h> - -#include "st21nfca.h" -#include "st21nfca_se.h" - -#define ST21NFCA_EVT_UICC_ACTIVATE 0x10 -#define ST21NFCA_EVT_UICC_DEACTIVATE 0x13 -#define ST21NFCA_EVT_SE_HARD_RESET 0x20 -#define ST21NFCA_EVT_SE_SOFT_RESET 0x11 -#define ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER 0x21 -#define ST21NFCA_EVT_SE_ACTIVATE 0x22 -#define ST21NFCA_EVT_SE_DEACTIVATE 0x23 - -#define ST21NFCA_EVT_TRANSMIT_DATA 0x10 -#define ST21NFCA_EVT_WTX_REQUEST 0x11 - -#define ST21NFCA_EVT_CONNECTIVITY 0x10 -#define ST21NFCA_EVT_TRANSACTION 0x12 - -#define ST21NFCA_ESE_HOST_ID 0xc0 - -#define ST21NFCA_SE_TO_HOT_PLUG 1000 -/* Connectivity pipe only */ -#define ST21NFCA_SE_COUNT_PIPE_UICC 0x01 -/* Connectivity + APDU Reader pipe */ -#define ST21NFCA_SE_COUNT_PIPE_EMBEDDED 0x02 - -#define ST21NFCA_SE_MODE_OFF 0x00 -#define ST21NFCA_SE_MODE_ON 0x01 - -#define ST21NFCA_PARAM_ATR 0x01 -#define ST21NFCA_ATR_DEFAULT_BWI 0x04 - -/* - * WT = 2^BWI/10[s], convert into msecs and add a secure - * room by increasing by 2 this timeout - */ -#define ST21NFCA_BWI_TO_TIMEOUT(x) ((1 << x) * 200) -#define ST21NFCA_ATR_GET_Y_FROM_TD(x) (x >> 4) - -/* If TA is present bit 0 is set */ -#define ST21NFCA_ATR_TA_PRESENT(x) (x & 0x01) -/* If TB is present bit 1 is set */ -#define ST21NFCA_ATR_TB_PRESENT(x) (x & 0x02) - -static u8 st21nfca_se_get_bwi(struct nfc_hci_dev *hdev) -{ - int i; - u8 td; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - /* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */ - for (i = 1; i < ST21NFCA_ESE_MAX_LENGTH; i++) { - td = ST21NFCA_ATR_GET_Y_FROM_TD(info->se_info.atr[i]); - if (ST21NFCA_ATR_TA_PRESENT(td)) - i++; - if (ST21NFCA_ATR_TB_PRESENT(td)) { - i++; - return info->se_info.atr[i] >> 4; - } - } - return ST21NFCA_ATR_DEFAULT_BWI; -} - -static void st21nfca_se_get_atr(struct nfc_hci_dev *hdev) -{ - int r; - struct sk_buff *skb; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - r = nfc_hci_get_param(hdev, ST21NFCA_APDU_READER_GATE, - ST21NFCA_PARAM_ATR, &skb); - if (r < 0) - return; - - if (skb->len <= ST21NFCA_ESE_MAX_LENGTH) { - memcpy(info->se_info.atr, skb->data, skb->len); - info->se_info.wt_timeout = - ST21NFCA_BWI_TO_TIMEOUT(st21nfca_se_get_bwi(hdev)); - } - kfree_skb(skb); -} - -static int st21nfca_hci_control_se(struct nfc_hci_dev *hdev, u32 se_idx, - u8 state) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - int r; - struct sk_buff *sk_host_list; - u8 se_event, host_id; - - switch (se_idx) { - case NFC_HCI_UICC_HOST_ID: - se_event = (state == ST21NFCA_SE_MODE_ON ? - ST21NFCA_EVT_UICC_ACTIVATE : - ST21NFCA_EVT_UICC_DEACTIVATE); - - info->se_info.count_pipes = 0; - info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_UICC; - break; - case ST21NFCA_ESE_HOST_ID: - se_event = (state == ST21NFCA_SE_MODE_ON ? - ST21NFCA_EVT_SE_ACTIVATE : - ST21NFCA_EVT_SE_DEACTIVATE); - - info->se_info.count_pipes = 0; - info->se_info.expected_pipes = ST21NFCA_SE_COUNT_PIPE_EMBEDDED; - break; - default: - return -EINVAL; - } - - /* - * Wait for an EVT_HOT_PLUG in order to - * retrieve a relevant host list. - */ - reinit_completion(&info->se_info.req_completion); - r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE, se_event, - NULL, 0); - if (r < 0) - return r; - - mod_timer(&info->se_info.se_active_timer, jiffies + - msecs_to_jiffies(ST21NFCA_SE_TO_HOT_PLUG)); - info->se_info.se_active = true; - - /* Ignore return value and check in any case the host_list */ - wait_for_completion_interruptible(&info->se_info.req_completion); - - r = nfc_hci_get_param(hdev, NFC_HCI_ADMIN_GATE, - NFC_HCI_ADMIN_HOST_LIST, - &sk_host_list); - if (r < 0) - return r; - - host_id = sk_host_list->data[sk_host_list->len - 1]; - kfree_skb(sk_host_list); - - if (state == ST21NFCA_SE_MODE_ON && host_id == se_idx) - return se_idx; - else if (state == ST21NFCA_SE_MODE_OFF && host_id != se_idx) - return se_idx; - - return -1; -} - -int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - int se_count = 0; - - if (info->se_status->is_uicc_present) { - nfc_add_se(hdev->ndev, NFC_HCI_UICC_HOST_ID, NFC_SE_UICC); - se_count++; - } - - if (info->se_status->is_ese_present) { - nfc_add_se(hdev->ndev, ST21NFCA_ESE_HOST_ID, NFC_SE_EMBEDDED); - se_count++; - } - - return !se_count; -} -EXPORT_SYMBOL(st21nfca_hci_discover_se); - -int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx) -{ - int r; - - /* - * According to upper layer, se_idx == NFC_SE_UICC when - * info->se_status->is_uicc_enable is true should never happen. - * Same for eSE. - */ - r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_ON); - - if (r == ST21NFCA_ESE_HOST_ID) { - st21nfca_se_get_atr(hdev); - r = nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE, - ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0); - if (r < 0) - return r; - } else if (r < 0) { - /* - * The activation tentative failed, the secure element - * is not connected. Remove from the list. - */ - nfc_remove_se(hdev->ndev, se_idx); - return r; - } - - return 0; -} -EXPORT_SYMBOL(st21nfca_hci_enable_se); - -int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx) -{ - int r; - - /* - * According to upper layer, se_idx == NFC_SE_UICC when - * info->se_status->is_uicc_enable is true should never happen - * Same for eSE. - */ - r = st21nfca_hci_control_se(hdev, se_idx, ST21NFCA_SE_MODE_OFF); - if (r < 0) - return r; - - return 0; -} -EXPORT_SYMBOL(st21nfca_hci_disable_se); - -int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx, - u8 *apdu, size_t apdu_length, - se_io_cb_t cb, void *cb_context) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - pr_debug("se_io %x\n", se_idx); - - switch (se_idx) { - case ST21NFCA_ESE_HOST_ID: - info->se_info.cb = cb; - info->se_info.cb_context = cb_context; - mod_timer(&info->se_info.bwi_timer, jiffies + - msecs_to_jiffies(info->se_info.wt_timeout)); - info->se_info.bwi_active = true; - return nfc_hci_send_event(hdev, ST21NFCA_APDU_READER_GATE, - ST21NFCA_EVT_TRANSMIT_DATA, - apdu, apdu_length); - default: - return -ENODEV; - } -} -EXPORT_SYMBOL(st21nfca_hci_se_io); - -static void st21nfca_se_wt_timeout(unsigned long data) -{ - /* - * No answer from the secure element - * within the defined timeout. - * Let's send a reset request as recovery procedure. - * According to the situation, we first try to send a software reset - * to the secure element. If the next command is still not - * answering in time, we send to the CLF a secure element hardware - * reset request. - */ - /* hardware reset managed through VCC_UICC_OUT power supply */ - u8 param = 0x01; - struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data; - - pr_debug("\n"); - - info->se_info.bwi_active = false; - - if (!info->se_info.xch_error) { - info->se_info.xch_error = true; - nfc_hci_send_event(info->hdev, ST21NFCA_APDU_READER_GATE, - ST21NFCA_EVT_SE_SOFT_RESET, NULL, 0); - } else { - info->se_info.xch_error = false; - nfc_hci_send_event(info->hdev, ST21NFCA_DEVICE_MGNT_GATE, - ST21NFCA_EVT_SE_HARD_RESET, ¶m, 1); - } - info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME); -} - -static void st21nfca_se_activation_timeout(unsigned long data) -{ - struct st21nfca_hci_info *info = (struct st21nfca_hci_info *) data; - - pr_debug("\n"); - - info->se_info.se_active = false; - - complete(&info->se_info.req_completion); -} - -/* - * Returns: - * <= 0: driver handled the event, skb consumed - * 1: driver does not handle the event, please do standard processing - */ -int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, - u8 event, struct sk_buff *skb) -{ - int r = 0; - struct device *dev = &hdev->ndev->dev; - struct nfc_evt_transaction *transaction; - - pr_debug("connectivity gate event: %x\n", event); - - switch (event) { - case ST21NFCA_EVT_CONNECTIVITY: - break; - case ST21NFCA_EVT_TRANSACTION: - /* - * According to specification etsi 102 622 - * 11.2.2.4 EVT_TRANSACTION Table 52 - * Description Tag Length - * AID 81 5 to 16 - * PARAMETERS 82 0 to 255 - */ - if (skb->len < NFC_MIN_AID_LENGTH + 2 && - skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG) - return -EPROTO; - - transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev, - skb->len - 2, GFP_KERNEL); - - transaction->aid_len = skb->data[1]; - memcpy(transaction->aid, &skb->data[2], - transaction->aid_len); - - /* Check next byte is PARAMETERS tag (82) */ - if (skb->data[transaction->aid_len + 2] != - NFC_EVT_TRANSACTION_PARAMS_TAG) - return -EPROTO; - - transaction->params_len = skb->data[transaction->aid_len + 3]; - memcpy(transaction->params, skb->data + - transaction->aid_len + 4, transaction->params_len); - - r = nfc_se_transaction(hdev->ndev, host, transaction); - break; - default: - return 1; - } - kfree_skb(skb); - return r; -} -EXPORT_SYMBOL(st21nfca_connectivity_event_received); - -int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev, - u8 event, struct sk_buff *skb) -{ - int r = 0; - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - pr_debug("apdu reader gate event: %x\n", event); - - switch (event) { - case ST21NFCA_EVT_TRANSMIT_DATA: - del_timer_sync(&info->se_info.bwi_timer); - info->se_info.bwi_active = false; - r = nfc_hci_send_event(hdev, ST21NFCA_DEVICE_MGNT_GATE, - ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER, NULL, 0); - if (r < 0) - goto exit; - - info->se_info.cb(info->se_info.cb_context, - skb->data, skb->len, 0); - break; - case ST21NFCA_EVT_WTX_REQUEST: - mod_timer(&info->se_info.bwi_timer, jiffies + - msecs_to_jiffies(info->se_info.wt_timeout)); - break; - } - -exit: - kfree_skb(skb); - return r; -} -EXPORT_SYMBOL(st21nfca_apdu_reader_event_received); - -void st21nfca_se_init(struct nfc_hci_dev *hdev) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - init_completion(&info->se_info.req_completion); - /* initialize timers */ - init_timer(&info->se_info.bwi_timer); - info->se_info.bwi_timer.data = (unsigned long)info; - info->se_info.bwi_timer.function = st21nfca_se_wt_timeout; - info->se_info.bwi_active = false; - - init_timer(&info->se_info.se_active_timer); - info->se_info.se_active_timer.data = (unsigned long)info; - info->se_info.se_active_timer.function = st21nfca_se_activation_timeout; - info->se_info.se_active = false; - - info->se_info.count_pipes = 0; - info->se_info.expected_pipes = 0; - - info->se_info.xch_error = false; - - info->se_info.wt_timeout = - ST21NFCA_BWI_TO_TIMEOUT(ST21NFCA_ATR_DEFAULT_BWI); -} -EXPORT_SYMBOL(st21nfca_se_init); - -void st21nfca_se_deinit(struct nfc_hci_dev *hdev) -{ - struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); - - if (info->se_info.bwi_active) - del_timer_sync(&info->se_info.bwi_timer); - if (info->se_info.se_active) - del_timer_sync(&info->se_info.se_active_timer); - - info->se_info.bwi_active = false; - info->se_info.se_active = false; -} -EXPORT_SYMBOL(st21nfca_se_deinit); diff --git a/drivers/nfc/st21nfca/st21nfca_se.h b/drivers/nfc/st21nfca/st21nfca_se.h deleted file mode 100644 index b172cfc..0000000 --- a/drivers/nfc/st21nfca/st21nfca_se.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * 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/>. - */ - -#ifndef __ST21NFCA_SE_H -#define __ST21NFCA_SE_H - -#include <linux/skbuff.h> -#include <linux/workqueue.h> - -/* - * ref ISO7816-3 chap 8.1. the initial character TS is followed by a - * sequence of at most 32 characters. - */ -#define ST21NFCA_ESE_MAX_LENGTH 33 -#define ST21NFCA_ESE_HOST_ID 0xc0 - -struct st21nfca_se_info { - u8 atr[ST21NFCA_ESE_MAX_LENGTH]; - struct completion req_completion; - - struct timer_list bwi_timer; - int wt_timeout; /* in msecs */ - bool bwi_active; - - struct timer_list se_active_timer; - bool se_active; - int expected_pipes; - int count_pipes; - - bool xch_error; - - se_io_cb_t cb; - void *cb_context; -}; - -int st21nfca_connectivity_event_received(struct nfc_hci_dev *hdev, u8 host, - u8 event, struct sk_buff *skb); -int st21nfca_apdu_reader_event_received(struct nfc_hci_dev *hdev, - u8 event, struct sk_buff *skb); - -int st21nfca_hci_discover_se(struct nfc_hci_dev *hdev); -int st21nfca_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx); -int st21nfca_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx); -int st21nfca_hci_se_io(struct nfc_hci_dev *hdev, u32 se_idx, - u8 *apdu, size_t apdu_length, - se_io_cb_t cb, void *cb_context); - -void st21nfca_se_init(struct nfc_hci_dev *hdev); -void st21nfca_se_deinit(struct nfc_hci_dev *hdev); -#endif /* __ST21NFCA_SE_H */ -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
