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// SPDX-License-Identifier: GPL-2.0-only
/*
* NCI based Driver for STMicroelectronics NFC Chip
*
* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
*/
#include <linux/module.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include "st-nci.h"
#define DRIVER_DESC "NCI NFC driver for ST_NCI"
#define ST_NCI1_X_PROPRIETARY_ISO15693 0x83
static int st_nci_init(struct nci_dev *ndev)
{
struct nci_mode_set_cmd cmd;
cmd.cmd_type = ST_NCI_SET_NFC_MODE;
cmd.mode = 1;
return nci_prop_cmd(ndev, ST_NCI_CORE_PROP,
sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd);
}
static int st_nci_open(struct nci_dev *ndev)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
int r;
if (test_and_set_bit(ST_NCI_RUNNING, &info->flags))
return 0;
r = ndlc_open(info->ndlc);
if (r)
clear_bit(ST_NCI_RUNNING, &info->flags);
return r;
}
static int st_nci_close(struct nci_dev *ndev)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
if (!test_bit(ST_NCI_RUNNING, &info->flags))
return 0;
ndlc_close(info->ndlc);
clear_bit(ST_NCI_RUNNING, &info->flags);
return 0;
}
static int st_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
skb->dev = (void *)ndev;
if (!test_bit(ST_NCI_RUNNING, &info->flags))
return -EBUSY;
return ndlc_send(info->ndlc, skb);
}
static __u32 st_nci_get_rfprotocol(struct nci_dev *ndev,
__u8 rf_protocol)
{
return rf_protocol == ST_NCI1_X_PROPRIETARY_ISO15693 ?
NFC_PROTO_ISO15693_MASK : 0;
}
static int st_nci_prop_rsp_packet(struct nci_dev *ndev,
struct sk_buff *skb)
{
__u8 status = skb->data[0];
nci_req_complete(ndev, status);
return 0;
}
static struct nci_driver_ops st_nci_prop_ops[] = {
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
ST_NCI_CORE_PROP),
.rsp = st_nci_prop_rsp_packet,
},
};
static struct nci_ops st_nci_ops = {
.init = st_nci_init,
.open = st_nci_open,
.close = st_nci_close,
.send = st_nci_send,
.get_rfprotocol = st_nci_get_rfprotocol,
.discover_se = st_nci_discover_se,
.enable_se = st_nci_enable_se,
.disable_se = st_nci_disable_se,
.se_io = st_nci_se_io,
.hci_load_session = st_nci_hci_load_session,
.hci_event_received = st_nci_hci_event_received,
.hci_cmd_received = st_nci_hci_cmd_received,
.prop_ops = st_nci_prop_ops,
.n_prop_ops = ARRAY_SIZE(st_nci_prop_ops),
};
int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
int phy_tailroom, struct st_nci_se_status *se_status)
{
struct st_nci_info *info;
int r;
u32 protocols;
info = devm_kzalloc(ndlc->dev,
sizeof(struct st_nci_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
protocols = NFC_PROTO_JEWEL_MASK
| NFC_PROTO_MIFARE_MASK
| NFC_PROTO_FELICA_MASK
| NFC_PROTO_ISO14443_MASK
| NFC_PROTO_ISO14443_B_MASK
| NFC_PROTO_ISO15693_MASK
| NFC_PROTO_NFC_DEP_MASK;
ndlc->ndev = nci_allocate_device(&st_nci_ops, protocols,
phy_headroom, phy_tailroom);
if (!ndlc->ndev) {
pr_err("Cannot allocate nfc ndev\n");
return -ENOMEM;
}
info->ndlc = ndlc;
nci_set_drvdata(ndlc->ndev, info);
r = st_nci_vendor_cmds_init(ndlc->ndev);
if (r) {
pr_err("Cannot register proprietary vendor cmds\n");
goto err_reg_dev;
}
r = nci_register_device(ndlc->ndev);
if (r) {
pr_err("Cannot register nfc device to nci core\n");
goto err_reg_dev;
}
return st_nci_se_init(ndlc->ndev, se_status);
err_reg_dev:
nci_free_device(ndlc->ndev);
return r;
}
EXPORT_SYMBOL_GPL(st_nci_probe);
void st_nci_remove(struct nci_dev *ndev)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
ndlc_close(info->ndlc);
nci_unregister_device(ndev);
nci_free_device(ndev);
}
EXPORT_SYMBOL_GPL(st_nci_remove);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(DRIVER_DESC);
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