From b4b7ff4b08e691656c9d77c758fc355833128ac0 Mon Sep 17 00:00:00 2001 From: AndrĂ© Fabian Silva Delgado Date: Wed, 20 Jan 2016 14:01:31 -0300 Subject: Linux-libre 4.4-gnu --- drivers/nfc/st21nfca/st21nfca_se.c | 420 ------------------------------------- 1 file changed, 420 deletions(-) delete mode 100644 drivers/nfc/st21nfca/st21nfca_se.c (limited to 'drivers/nfc/st21nfca/st21nfca_se.c') diff --git a/drivers/nfc/st21nfca/st21nfca_se.c b/drivers/nfc/st21nfca/st21nfca_se.c deleted file mode 100644 index 3197e9bb6..000000000 --- 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 . - */ - -#include - -#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); -- cgit v1.2.3-54-g00ecf