365 lines
8.0 KiB
C
365 lines
8.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Proprietary commands extension for STMicroelectronics NFC Chip
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*
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* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
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*/
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#include <net/genetlink.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 <net/nfc/llc.h>
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#include "st21nfca.h"
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#define ST21NFCA_HCI_DM_GETDATA 0x10
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#define ST21NFCA_HCI_DM_PUTDATA 0x11
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#define ST21NFCA_HCI_DM_LOAD 0x12
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#define ST21NFCA_HCI_DM_GETINFO 0x13
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#define ST21NFCA_HCI_DM_UPDATE_AID 0x20
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#define ST21NFCA_HCI_DM_RESET 0x3e
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#define ST21NFCA_HCI_DM_FIELD_GENERATOR 0x32
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#define ST21NFCA_FACTORY_MODE_ON 1
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#define ST21NFCA_FACTORY_MODE_OFF 0
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#define ST21NFCA_EVT_POST_DATA 0x02
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struct get_param_data {
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u8 gate;
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u8 data;
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} __packed;
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static int st21nfca_factory_mode(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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if (data_len != 1)
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return -EINVAL;
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pr_debug("factory mode: %x\n", ((u8 *)data)[0]);
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switch (((u8 *)data)[0]) {
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case ST21NFCA_FACTORY_MODE_ON:
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test_and_set_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks);
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break;
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case ST21NFCA_FACTORY_MODE_OFF:
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clear_bit(ST21NFCA_FACTORY_MODE, &hdev->quirks);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int st21nfca_hci_clear_all_pipes(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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return nfc_hci_disconnect_all_gates(hdev);
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}
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static int st21nfca_hci_dm_put_data(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_PUTDATA, data,
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data_len, NULL);
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}
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static int st21nfca_hci_dm_update_aid(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_UPDATE_AID, data, data_len, NULL);
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}
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static int st21nfca_hci_dm_get_info(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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int r;
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struct sk_buff *msg, *skb;
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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r = nfc_hci_send_cmd(hdev,
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ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_GETINFO,
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data, data_len, &skb);
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if (r)
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goto exit;
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msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI,
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HCI_DM_GET_INFO, skb->len);
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if (!msg) {
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r = -ENOMEM;
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goto free_skb;
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}
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if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
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kfree_skb(msg);
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r = -ENOBUFS;
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goto free_skb;
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}
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r = nfc_vendor_cmd_reply(msg);
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free_skb:
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kfree_skb(skb);
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exit:
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return r;
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}
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static int st21nfca_hci_dm_get_data(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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int r;
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struct sk_buff *msg, *skb;
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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r = nfc_hci_send_cmd(hdev,
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ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_GETDATA,
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data, data_len, &skb);
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if (r)
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goto exit;
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msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI,
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HCI_DM_GET_DATA, skb->len);
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if (!msg) {
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r = -ENOMEM;
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goto free_skb;
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}
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if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
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kfree_skb(msg);
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r = -ENOBUFS;
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goto free_skb;
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}
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r = nfc_vendor_cmd_reply(msg);
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free_skb:
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kfree_skb(skb);
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exit:
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return r;
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}
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static int st21nfca_hci_dm_load(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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return nfc_hci_send_cmd(hdev, ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_LOAD, data, data_len, NULL);
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}
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static int st21nfca_hci_dm_reset(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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int r;
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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r = nfc_hci_send_cmd_async(hdev, ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_RESET, data, data_len, NULL, NULL);
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if (r < 0)
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return r;
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r = nfc_llc_stop(hdev->llc);
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if (r < 0)
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return r;
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return nfc_llc_start(hdev->llc);
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}
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static int st21nfca_hci_get_param(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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int r;
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struct sk_buff *msg, *skb;
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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struct get_param_data *param = (struct get_param_data *)data;
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if (data_len < sizeof(struct get_param_data))
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return -EPROTO;
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r = nfc_hci_get_param(hdev, param->gate, param->data, &skb);
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if (r)
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goto exit;
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msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST21NFCA_VENDOR_OUI,
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HCI_GET_PARAM, skb->len);
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if (!msg) {
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r = -ENOMEM;
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goto free_skb;
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}
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if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
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kfree_skb(msg);
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r = -ENOBUFS;
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goto free_skb;
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}
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r = nfc_vendor_cmd_reply(msg);
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free_skb:
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kfree_skb(skb);
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exit:
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return r;
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}
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static int st21nfca_hci_dm_field_generator(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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return nfc_hci_send_cmd(hdev,
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ST21NFCA_DEVICE_MGNT_GATE,
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ST21NFCA_HCI_DM_FIELD_GENERATOR,
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data, data_len, NULL);
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}
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int st21nfca_hci_loopback_event_received(struct nfc_hci_dev *hdev, u8 event,
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struct sk_buff *skb)
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{
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struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
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switch (event) {
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case ST21NFCA_EVT_POST_DATA:
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info->vendor_info.rx_skb = skb;
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break;
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default:
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nfc_err(&hdev->ndev->dev, "Unexpected event on loopback gate\n");
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}
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complete(&info->vendor_info.req_completion);
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return 0;
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}
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EXPORT_SYMBOL(st21nfca_hci_loopback_event_received);
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static int st21nfca_hci_loopback(struct nfc_dev *dev, void *data,
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size_t data_len)
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{
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int r;
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struct sk_buff *msg;
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struct nfc_hci_dev *hdev = nfc_get_drvdata(dev);
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struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
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if (data_len <= 0)
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return -EPROTO;
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reinit_completion(&info->vendor_info.req_completion);
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info->vendor_info.rx_skb = NULL;
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r = nfc_hci_send_event(hdev, NFC_HCI_LOOPBACK_GATE,
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ST21NFCA_EVT_POST_DATA, data, data_len);
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if (r < 0) {
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r = -EPROTO;
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goto exit;
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}
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wait_for_completion_interruptible(&info->vendor_info.req_completion);
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if (!info->vendor_info.rx_skb ||
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info->vendor_info.rx_skb->len != data_len) {
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r = -EPROTO;
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goto exit;
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}
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msg = nfc_vendor_cmd_alloc_reply_skb(hdev->ndev,
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ST21NFCA_VENDOR_OUI,
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HCI_LOOPBACK,
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info->vendor_info.rx_skb->len);
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if (!msg) {
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r = -ENOMEM;
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goto free_skb;
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}
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if (nla_put(msg, NFC_ATTR_VENDOR_DATA, info->vendor_info.rx_skb->len,
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info->vendor_info.rx_skb->data)) {
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kfree_skb(msg);
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r = -ENOBUFS;
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goto free_skb;
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}
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r = nfc_vendor_cmd_reply(msg);
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free_skb:
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kfree_skb(info->vendor_info.rx_skb);
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exit:
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return r;
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}
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static const struct nfc_vendor_cmd st21nfca_vendor_cmds[] = {
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = FACTORY_MODE,
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.doit = st21nfca_factory_mode,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_CLEAR_ALL_PIPES,
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.doit = st21nfca_hci_clear_all_pipes,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_PUT_DATA,
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.doit = st21nfca_hci_dm_put_data,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_UPDATE_AID,
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.doit = st21nfca_hci_dm_update_aid,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_GET_INFO,
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.doit = st21nfca_hci_dm_get_info,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_GET_DATA,
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.doit = st21nfca_hci_dm_get_data,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_LOAD,
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.doit = st21nfca_hci_dm_load,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_RESET,
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.doit = st21nfca_hci_dm_reset,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_GET_PARAM,
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.doit = st21nfca_hci_get_param,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_DM_FIELD_GENERATOR,
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.doit = st21nfca_hci_dm_field_generator,
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},
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{
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.vendor_id = ST21NFCA_VENDOR_OUI,
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.subcmd = HCI_LOOPBACK,
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.doit = st21nfca_hci_loopback,
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},
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};
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int st21nfca_vendor_cmds_init(struct nfc_hci_dev *hdev)
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{
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struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
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init_completion(&info->vendor_info.req_completion);
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return nfc_hci_set_vendor_cmds(hdev, st21nfca_vendor_cmds,
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sizeof(st21nfca_vendor_cmds));
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}
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EXPORT_SYMBOL(st21nfca_vendor_cmds_init);
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