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