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