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|
// 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 const 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);
|
