forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
749 lines
20 KiB
749 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Secure Element driver for STMicroelectronics NFC NCI chip |
|
* |
|
* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/nfc.h> |
|
#include <linux/delay.h> |
|
#include <net/nfc/nci.h> |
|
#include <net/nfc/nci_core.h> |
|
|
|
#include "st-nci.h" |
|
|
|
struct st_nci_pipe_info { |
|
u8 pipe_state; |
|
u8 src_host_id; |
|
u8 src_gate_id; |
|
u8 dst_host_id; |
|
u8 dst_gate_id; |
|
} __packed; |
|
|
|
/* Hosts */ |
|
#define ST_NCI_HOST_CONTROLLER_ID 0x00 |
|
#define ST_NCI_TERMINAL_HOST_ID 0x01 |
|
#define ST_NCI_UICC_HOST_ID 0x02 |
|
#define ST_NCI_ESE_HOST_ID 0xc0 |
|
|
|
/* Gates */ |
|
#define ST_NCI_APDU_READER_GATE 0xf0 |
|
#define ST_NCI_CONNECTIVITY_GATE 0x41 |
|
|
|
/* Pipes */ |
|
#define ST_NCI_DEVICE_MGNT_PIPE 0x02 |
|
|
|
/* Connectivity pipe only */ |
|
#define ST_NCI_SE_COUNT_PIPE_UICC 0x01 |
|
/* Connectivity + APDU Reader pipe */ |
|
#define ST_NCI_SE_COUNT_PIPE_EMBEDDED 0x02 |
|
|
|
#define ST_NCI_SE_TO_HOT_PLUG 1000 /* msecs */ |
|
#define ST_NCI_SE_TO_PIPES 2000 |
|
|
|
#define ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80) |
|
|
|
#define NCI_HCI_APDU_PARAM_ATR 0x01 |
|
#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01 |
|
#define NCI_HCI_ADMIN_PARAM_WHITELIST 0x03 |
|
#define NCI_HCI_ADMIN_PARAM_HOST_LIST 0x04 |
|
|
|
#define ST_NCI_EVT_SE_HARD_RESET 0x20 |
|
#define ST_NCI_EVT_TRANSMIT_DATA 0x10 |
|
#define ST_NCI_EVT_WTX_REQUEST 0x11 |
|
#define ST_NCI_EVT_SE_SOFT_RESET 0x11 |
|
#define ST_NCI_EVT_SE_END_OF_APDU_TRANSFER 0x21 |
|
#define ST_NCI_EVT_HOT_PLUG 0x03 |
|
|
|
#define ST_NCI_SE_MODE_OFF 0x00 |
|
#define ST_NCI_SE_MODE_ON 0x01 |
|
|
|
#define ST_NCI_EVT_CONNECTIVITY 0x10 |
|
#define ST_NCI_EVT_TRANSACTION 0x12 |
|
|
|
#define ST_NCI_DM_GETINFO 0x13 |
|
#define ST_NCI_DM_GETINFO_PIPE_LIST 0x02 |
|
#define ST_NCI_DM_GETINFO_PIPE_INFO 0x01 |
|
#define ST_NCI_DM_PIPE_CREATED 0x02 |
|
#define ST_NCI_DM_PIPE_OPEN 0x04 |
|
#define ST_NCI_DM_RF_ACTIVE 0x80 |
|
#define ST_NCI_DM_DISCONNECT 0x30 |
|
|
|
#define ST_NCI_DM_IS_PIPE_OPEN(p) \ |
|
((p & 0x0f) == (ST_NCI_DM_PIPE_CREATED | ST_NCI_DM_PIPE_OPEN)) |
|
|
|
#define ST_NCI_ATR_DEFAULT_BWI 0x04 |
|
|
|
/* |
|
* WT = 2^BWI/10[s], convert into msecs and add a secure |
|
* room by increasing by 2 this timeout |
|
*/ |
|
#define ST_NCI_BWI_TO_TIMEOUT(x) ((1 << x) * 200) |
|
#define ST_NCI_ATR_GET_Y_FROM_TD(x) (x >> 4) |
|
|
|
/* If TA is present bit 0 is set */ |
|
#define ST_NCI_ATR_TA_PRESENT(x) (x & 0x01) |
|
/* If TB is present bit 1 is set */ |
|
#define ST_NCI_ATR_TB_PRESENT(x) (x & 0x02) |
|
|
|
#define ST_NCI_NUM_DEVICES 256 |
|
|
|
static DECLARE_BITMAP(dev_mask, ST_NCI_NUM_DEVICES); |
|
|
|
/* Here are the mandatory pipe for st_nci */ |
|
static struct nci_hci_gate st_nci_gates[] = { |
|
{NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
{NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
{ST_NCI_DEVICE_MGNT_GATE, ST_NCI_DEVICE_MGNT_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
|
|
{NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
|
|
/* Secure element pipes are created by secure element host */ |
|
{ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
{ST_NCI_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE, |
|
ST_NCI_HOST_CONTROLLER_ID}, |
|
}; |
|
|
|
static u8 st_nci_se_get_bwi(struct nci_dev *ndev) |
|
{ |
|
int i; |
|
u8 td; |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
/* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */ |
|
for (i = 1; i < ST_NCI_ESE_MAX_LENGTH; i++) { |
|
td = ST_NCI_ATR_GET_Y_FROM_TD(info->se_info.atr[i]); |
|
if (ST_NCI_ATR_TA_PRESENT(td)) |
|
i++; |
|
if (ST_NCI_ATR_TB_PRESENT(td)) { |
|
i++; |
|
return info->se_info.atr[i] >> 4; |
|
} |
|
} |
|
return ST_NCI_ATR_DEFAULT_BWI; |
|
} |
|
|
|
static void st_nci_se_get_atr(struct nci_dev *ndev) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
int r; |
|
struct sk_buff *skb; |
|
|
|
r = nci_hci_get_param(ndev, ST_NCI_APDU_READER_GATE, |
|
NCI_HCI_APDU_PARAM_ATR, &skb); |
|
if (r < 0) |
|
return; |
|
|
|
if (skb->len <= ST_NCI_ESE_MAX_LENGTH) { |
|
memcpy(info->se_info.atr, skb->data, skb->len); |
|
|
|
info->se_info.wt_timeout = |
|
ST_NCI_BWI_TO_TIMEOUT(st_nci_se_get_bwi(ndev)); |
|
} |
|
kfree_skb(skb); |
|
} |
|
|
|
int st_nci_hci_load_session(struct nci_dev *ndev) |
|
{ |
|
int i, j, r; |
|
struct sk_buff *skb_pipe_list, *skb_pipe_info; |
|
struct st_nci_pipe_info *dm_pipe_info; |
|
u8 pipe_list[] = { ST_NCI_DM_GETINFO_PIPE_LIST, |
|
ST_NCI_TERMINAL_HOST_ID}; |
|
u8 pipe_info[] = { ST_NCI_DM_GETINFO_PIPE_INFO, |
|
ST_NCI_TERMINAL_HOST_ID, 0}; |
|
|
|
/* On ST_NCI device pipes number are dynamics |
|
* 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 ST_NCI is to: |
|
* - get a pipe list for each host. |
|
* (eg: ST_NCI_HOST_CONTROLLER_ID for now). |
|
* (TODO Later on UICC HOST and eSE HOST) |
|
* - get pipe information |
|
* - match retrieved pipe list in st_nci_gates |
|
* ST_NCI_DEVICE_MGNT_GATE is a proprietary gate |
|
* with ST_NCI_DEVICE_MGNT_PIPE. |
|
* Pipe can be closed and need to be open. |
|
*/ |
|
r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID, |
|
ST_NCI_DEVICE_MGNT_GATE, |
|
ST_NCI_DEVICE_MGNT_PIPE); |
|
if (r < 0) |
|
return r; |
|
|
|
/* Get pipe list */ |
|
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, |
|
ST_NCI_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 = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, |
|
ST_NCI_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) |
|
*/ |
|
dm_pipe_info = (struct st_nci_pipe_info *)skb_pipe_info->data; |
|
if (dm_pipe_info->dst_gate_id == ST_NCI_APDU_READER_GATE && |
|
dm_pipe_info->src_host_id == ST_NCI_UICC_HOST_ID) { |
|
pr_err("Unexpected apdu_reader pipe on host %x\n", |
|
dm_pipe_info->src_host_id); |
|
kfree_skb(skb_pipe_info); |
|
continue; |
|
} |
|
|
|
for (j = 3; (j < ARRAY_SIZE(st_nci_gates)) && |
|
(st_nci_gates[j].gate != dm_pipe_info->dst_gate_id); j++) |
|
; |
|
|
|
if (j < ARRAY_SIZE(st_nci_gates) && |
|
st_nci_gates[j].gate == dm_pipe_info->dst_gate_id && |
|
ST_NCI_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) { |
|
ndev->hci_dev->init_data.gates[j].pipe = pipe_info[2]; |
|
|
|
ndev->hci_dev->gate2pipe[st_nci_gates[j].gate] = |
|
pipe_info[2]; |
|
ndev->hci_dev->pipes[pipe_info[2]].gate = |
|
st_nci_gates[j].gate; |
|
ndev->hci_dev->pipes[pipe_info[2]].host = |
|
dm_pipe_info->src_host_id; |
|
} |
|
kfree_skb(skb_pipe_info); |
|
} |
|
|
|
/* |
|
* 3 gates have a well known pipe ID. Only NCI_HCI_LINK_MGMT_GATE |
|
* is not yet open at this stage. |
|
*/ |
|
r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID, |
|
NCI_HCI_LINK_MGMT_GATE, |
|
NCI_HCI_LINK_MGMT_PIPE); |
|
|
|
kfree_skb(skb_pipe_list); |
|
return r; |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_hci_load_session); |
|
|
|
static void st_nci_hci_admin_event_received(struct nci_dev *ndev, |
|
u8 event, struct sk_buff *skb) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
switch (event) { |
|
case ST_NCI_EVT_HOT_PLUG: |
|
if (info->se_info.se_active) { |
|
if (!ST_NCI_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(ST_NCI_SE_TO_PIPES)); |
|
} |
|
} |
|
break; |
|
default: |
|
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on admin gate\n"); |
|
} |
|
} |
|
|
|
static int st_nci_hci_apdu_reader_event_received(struct nci_dev *ndev, |
|
u8 event, |
|
struct sk_buff *skb) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
pr_debug("apdu reader gate event: %x\n", event); |
|
|
|
switch (event) { |
|
case ST_NCI_EVT_TRANSMIT_DATA: |
|
del_timer_sync(&info->se_info.bwi_timer); |
|
info->se_info.bwi_active = false; |
|
info->se_info.cb(info->se_info.cb_context, |
|
skb->data, skb->len, 0); |
|
break; |
|
case ST_NCI_EVT_WTX_REQUEST: |
|
mod_timer(&info->se_info.bwi_timer, jiffies + |
|
msecs_to_jiffies(info->se_info.wt_timeout)); |
|
break; |
|
default: |
|
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on apdu reader gate\n"); |
|
return 1; |
|
} |
|
|
|
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 st_nci_hci_connectivity_event_received(struct nci_dev *ndev, |
|
u8 host, u8 event, |
|
struct sk_buff *skb) |
|
{ |
|
int r = 0; |
|
struct device *dev = &ndev->nfc_dev->dev; |
|
struct nfc_evt_transaction *transaction; |
|
|
|
pr_debug("connectivity gate event: %x\n", event); |
|
|
|
switch (event) { |
|
case ST_NCI_EVT_CONNECTIVITY: |
|
r = nfc_se_connectivity(ndev->nfc_dev, host); |
|
break; |
|
case ST_NCI_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 = devm_kzalloc(dev, skb->len - 2, GFP_KERNEL); |
|
if (!transaction) |
|
return -ENOMEM; |
|
|
|
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(ndev->nfc_dev, host, transaction); |
|
break; |
|
default: |
|
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n"); |
|
return 1; |
|
} |
|
kfree_skb(skb); |
|
return r; |
|
} |
|
|
|
void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe, |
|
u8 event, struct sk_buff *skb) |
|
{ |
|
u8 gate = ndev->hci_dev->pipes[pipe].gate; |
|
u8 host = ndev->hci_dev->pipes[pipe].host; |
|
|
|
switch (gate) { |
|
case NCI_HCI_ADMIN_GATE: |
|
st_nci_hci_admin_event_received(ndev, event, skb); |
|
break; |
|
case ST_NCI_APDU_READER_GATE: |
|
st_nci_hci_apdu_reader_event_received(ndev, event, skb); |
|
break; |
|
case ST_NCI_CONNECTIVITY_GATE: |
|
st_nci_hci_connectivity_event_received(ndev, host, event, skb); |
|
break; |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_hci_event_received); |
|
|
|
void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd, |
|
struct sk_buff *skb) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
u8 gate = ndev->hci_dev->pipes[pipe].gate; |
|
|
|
pr_debug("cmd: %x\n", cmd); |
|
|
|
switch (cmd) { |
|
case NCI_HCI_ANY_OPEN_PIPE: |
|
if (gate != ST_NCI_APDU_READER_GATE && |
|
ndev->hci_dev->pipes[pipe].host != ST_NCI_UICC_HOST_ID) |
|
ndev->hci_dev->count_pipes++; |
|
|
|
if (ndev->hci_dev->count_pipes == |
|
ndev->hci_dev->expected_pipes) { |
|
del_timer_sync(&info->se_info.se_active_timer); |
|
info->se_info.se_active = false; |
|
ndev->hci_dev->count_pipes = 0; |
|
complete(&info->se_info.req_completion); |
|
} |
|
break; |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received); |
|
|
|
static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx, |
|
u8 state) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
int r, i; |
|
struct sk_buff *sk_host_list; |
|
u8 host_id; |
|
|
|
switch (se_idx) { |
|
case ST_NCI_UICC_HOST_ID: |
|
ndev->hci_dev->count_pipes = 0; |
|
ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC; |
|
break; |
|
case ST_NCI_ESE_HOST_ID: |
|
ndev->hci_dev->count_pipes = 0; |
|
ndev->hci_dev->expected_pipes = ST_NCI_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 = nci_nfcee_mode_set(ndev, se_idx, state); |
|
if (r != NCI_STATUS_OK) |
|
return r; |
|
|
|
mod_timer(&info->se_info.se_active_timer, jiffies + |
|
msecs_to_jiffies(ST_NCI_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); |
|
|
|
/* There might be some "collision" after receiving a HOT_PLUG event |
|
* This may cause the CLF to not answer to the next hci command. |
|
* There is no possible synchronization to prevent this. |
|
* Adding a small delay is the only way to solve the issue. |
|
*/ |
|
if (info->se_info.se_status->is_ese_present && |
|
info->se_info.se_status->is_uicc_present) |
|
usleep_range(15000, 20000); |
|
|
|
r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE, |
|
NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list); |
|
if (r != NCI_HCI_ANY_OK) |
|
return r; |
|
|
|
for (i = 0; i < sk_host_list->len && |
|
sk_host_list->data[i] != se_idx; i++) |
|
; |
|
host_id = sk_host_list->data[i]; |
|
kfree_skb(sk_host_list); |
|
if (state == ST_NCI_SE_MODE_ON && host_id == se_idx) |
|
return se_idx; |
|
else if (state == ST_NCI_SE_MODE_OFF && host_id != se_idx) |
|
return se_idx; |
|
|
|
return -1; |
|
} |
|
|
|
int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx) |
|
{ |
|
int r; |
|
|
|
pr_debug("st_nci_disable_se\n"); |
|
|
|
/* |
|
* According to upper layer, se_idx == NFC_SE_UICC when |
|
* info->se_info.se_status->is_uicc_enable is true should never happen |
|
* Same for eSE. |
|
*/ |
|
r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF); |
|
if (r < 0) { |
|
/* Do best effort to release SWP */ |
|
if (se_idx == NFC_SE_EMBEDDED) { |
|
r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, |
|
ST_NCI_EVT_SE_END_OF_APDU_TRANSFER, |
|
NULL, 0); |
|
} |
|
return r; |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_disable_se); |
|
|
|
int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx) |
|
{ |
|
int r; |
|
|
|
pr_debug("st_nci_enable_se\n"); |
|
|
|
/* |
|
* According to upper layer, se_idx == NFC_SE_UICC when |
|
* info->se_info.se_status->is_uicc_enable is true should never happen. |
|
* Same for eSE. |
|
*/ |
|
r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON); |
|
if (r == ST_NCI_ESE_HOST_ID) { |
|
st_nci_se_get_atr(ndev); |
|
r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, |
|
ST_NCI_EVT_SE_SOFT_RESET, NULL, 0); |
|
} |
|
|
|
if (r < 0) { |
|
/* |
|
* The activation procedure failed, the secure element |
|
* is not connected. Remove from the list. |
|
*/ |
|
nfc_remove_se(ndev->nfc_dev, se_idx); |
|
return r; |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_enable_se); |
|
|
|
static int st_nci_hci_network_init(struct nci_dev *ndev) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
struct core_conn_create_dest_spec_params *dest_params; |
|
struct dest_spec_params spec_params; |
|
struct nci_conn_info *conn_info; |
|
int r, dev_num; |
|
|
|
dest_params = |
|
kzalloc(sizeof(struct core_conn_create_dest_spec_params) + |
|
sizeof(struct dest_spec_params), GFP_KERNEL); |
|
if (dest_params == NULL) { |
|
r = -ENOMEM; |
|
goto exit; |
|
} |
|
|
|
dest_params->type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE; |
|
dest_params->length = sizeof(struct dest_spec_params); |
|
spec_params.id = ndev->hci_dev->nfcee_id; |
|
spec_params.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS; |
|
memcpy(dest_params->value, &spec_params, |
|
sizeof(struct dest_spec_params)); |
|
r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCEE, 1, |
|
sizeof(struct core_conn_create_dest_spec_params) + |
|
sizeof(struct dest_spec_params), |
|
dest_params); |
|
if (r != NCI_STATUS_OK) |
|
goto free_dest_params; |
|
|
|
conn_info = ndev->hci_dev->conn_info; |
|
if (!conn_info) |
|
goto free_dest_params; |
|
|
|
ndev->hci_dev->init_data.gate_count = ARRAY_SIZE(st_nci_gates); |
|
memcpy(ndev->hci_dev->init_data.gates, st_nci_gates, |
|
sizeof(st_nci_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, ST_NCI_NUM_DEVICES); |
|
if (dev_num >= ST_NCI_NUM_DEVICES) { |
|
r = -ENODEV; |
|
goto free_dest_params; |
|
} |
|
|
|
scnprintf(ndev->hci_dev->init_data.session_id, |
|
sizeof(ndev->hci_dev->init_data.session_id), |
|
"%s%2x", "ST21BH", dev_num); |
|
|
|
r = nci_hci_dev_session_init(ndev); |
|
if (r != NCI_HCI_ANY_OK) |
|
goto free_dest_params; |
|
|
|
/* |
|
* In factory mode, we prevent secure elements activation |
|
* by disabling nfcee on the current HCI connection id. |
|
* HCI will be used here only for proprietary commands. |
|
*/ |
|
if (test_bit(ST_NCI_FACTORY_MODE, &info->flags)) |
|
r = nci_nfcee_mode_set(ndev, |
|
ndev->hci_dev->conn_info->dest_params->id, |
|
NCI_NFCEE_DISABLE); |
|
else |
|
r = nci_nfcee_mode_set(ndev, |
|
ndev->hci_dev->conn_info->dest_params->id, |
|
NCI_NFCEE_ENABLE); |
|
|
|
free_dest_params: |
|
kfree(dest_params); |
|
|
|
exit: |
|
return r; |
|
} |
|
|
|
int st_nci_discover_se(struct nci_dev *ndev) |
|
{ |
|
u8 white_list[2]; |
|
int r, wl_size = 0; |
|
int se_count = 0; |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
pr_debug("st_nci_discover_se\n"); |
|
|
|
r = st_nci_hci_network_init(ndev); |
|
if (r != 0) |
|
return r; |
|
|
|
if (test_bit(ST_NCI_FACTORY_MODE, &info->flags)) |
|
return 0; |
|
|
|
if (info->se_info.se_status->is_uicc_present) |
|
white_list[wl_size++] = ST_NCI_UICC_HOST_ID; |
|
if (info->se_info.se_status->is_ese_present) |
|
white_list[wl_size++] = ST_NCI_ESE_HOST_ID; |
|
|
|
if (wl_size) { |
|
r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE, |
|
NCI_HCI_ADMIN_PARAM_WHITELIST, |
|
white_list, wl_size); |
|
if (r != NCI_HCI_ANY_OK) |
|
return r; |
|
} |
|
|
|
if (info->se_info.se_status->is_uicc_present) { |
|
nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC); |
|
se_count++; |
|
} |
|
|
|
if (info->se_info.se_status->is_ese_present) { |
|
nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED); |
|
se_count++; |
|
} |
|
|
|
return !se_count; |
|
} |
|
EXPORT_SYMBOL_GPL(st_nci_discover_se); |
|
|
|
int st_nci_se_io(struct nci_dev *ndev, u32 se_idx, |
|
u8 *apdu, size_t apdu_length, |
|
se_io_cb_t cb, void *cb_context) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
pr_debug("\n"); |
|
|
|
switch (se_idx) { |
|
case ST_NCI_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 nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, |
|
ST_NCI_EVT_TRANSMIT_DATA, apdu, |
|
apdu_length); |
|
default: |
|
return -ENODEV; |
|
} |
|
} |
|
EXPORT_SYMBOL(st_nci_se_io); |
|
|
|
static void st_nci_se_wt_timeout(struct timer_list *t) |
|
{ |
|
/* |
|
* 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 st_nci_info *info = from_timer(info, t, se_info.bwi_timer); |
|
|
|
pr_debug("\n"); |
|
|
|
info->se_info.bwi_active = false; |
|
|
|
if (!info->se_info.xch_error) { |
|
info->se_info.xch_error = true; |
|
nci_hci_send_event(info->ndlc->ndev, ST_NCI_APDU_READER_GATE, |
|
ST_NCI_EVT_SE_SOFT_RESET, NULL, 0); |
|
} else { |
|
info->se_info.xch_error = false; |
|
nci_hci_send_event(info->ndlc->ndev, ST_NCI_DEVICE_MGNT_GATE, |
|
ST_NCI_EVT_SE_HARD_RESET, ¶m, 1); |
|
} |
|
info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME); |
|
} |
|
|
|
static void st_nci_se_activation_timeout(struct timer_list *t) |
|
{ |
|
struct st_nci_info *info = from_timer(info, t, |
|
se_info.se_active_timer); |
|
|
|
pr_debug("\n"); |
|
|
|
info->se_info.se_active = false; |
|
|
|
complete(&info->se_info.req_completion); |
|
} |
|
|
|
int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
init_completion(&info->se_info.req_completion); |
|
/* initialize timers */ |
|
timer_setup(&info->se_info.bwi_timer, st_nci_se_wt_timeout, 0); |
|
info->se_info.bwi_active = false; |
|
|
|
timer_setup(&info->se_info.se_active_timer, |
|
st_nci_se_activation_timeout, 0); |
|
info->se_info.se_active = false; |
|
|
|
info->se_info.xch_error = false; |
|
|
|
info->se_info.wt_timeout = |
|
ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI); |
|
|
|
info->se_info.se_status = se_status; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(st_nci_se_init); |
|
|
|
void st_nci_se_deinit(struct nci_dev *ndev) |
|
{ |
|
struct st_nci_info *info = nci_get_drvdata(ndev); |
|
|
|
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.se_active = false; |
|
info->se_info.bwi_active = false; |
|
} |
|
EXPORT_SYMBOL(st_nci_se_deinit); |
|
|
|
|