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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*/
#include <linux/module.h>
#include <net/nfc/nci_core.h>
#include "s3fwrn5.h"
#include "firmware.h"
#include "nci.h"
#define S3FWRN5_NFC_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)
static int s3fwrn5_firmware_init(struct s3fwrn5_info *info)
{
struct s3fwrn5_fw_info *fw_info = &info->fw_info;
int ret;
s3fwrn5_fw_init(fw_info, "sec_s3fwrn5_firmware.bin");
/* Get firmware data */
ret = s3fwrn5_fw_request_firmware(fw_info);
if (ret < 0)
dev_err(&fw_info->ndev->nfc_dev->dev,
"Failed to get fw file, ret=%02x\n", ret);
return ret;
}
static int s3fwrn5_firmware_update(struct s3fwrn5_info *info)
{
bool need_update;
int ret;
/* Update firmware */
s3fwrn5_set_wake(info, false);
s3fwrn5_set_mode(info, S3FWRN5_MODE_FW);
ret = s3fwrn5_fw_setup(&info->fw_info);
if (ret < 0)
return ret;
need_update = s3fwrn5_fw_check_version(&info->fw_info,
info->ndev->manufact_specific_info);
if (!need_update)
goto out;
dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n");
ret = s3fwrn5_fw_download(&info->fw_info);
if (ret < 0)
goto out;
/* Update RF configuration */
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin");
s3fwrn5_set_wake(info, false);
out:
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
s3fwrn5_fw_cleanup(&info->fw_info);
return ret;
}
static int s3fwrn5_nci_open(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD)
return -EBUSY;
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
return 0;
}
static int s3fwrn5_nci_close(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
s3fwrn5_set_wake(info, false);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
return 0;
}
static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
int ret;
mutex_lock(&info->mutex);
if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) {
kfree_skb(skb);
mutex_unlock(&info->mutex);
return -EINVAL;
}
ret = s3fwrn5_write(info, skb);
if (ret < 0) {
kfree_skb(skb);
mutex_unlock(&info->mutex);
return ret;
}
consume_skb(skb);
mutex_unlock(&info->mutex);
return 0;
}
static int s3fwrn5_nci_post_setup(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
int ret;
if (s3fwrn5_firmware_init(info)) {
//skip bootloader mode
return 0;
}
ret = s3fwrn5_firmware_update(info);
if (ret < 0)
return ret;
/* NCI core reset */
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
ret = nci_core_reset(info->ndev);
if (ret < 0)
return ret;
return nci_core_init(info->ndev);
}
static const struct nci_ops s3fwrn5_nci_ops = {
.open = s3fwrn5_nci_open,
.close = s3fwrn5_nci_close,
.send = s3fwrn5_nci_send,
.post_setup = s3fwrn5_nci_post_setup,
.prop_ops = s3fwrn5_nci_prop_ops,
.n_prop_ops = ARRAY_SIZE(s3fwrn5_nci_prop_ops),
};
int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
const struct s3fwrn5_phy_ops *phy_ops)
{
struct s3fwrn5_info *info;
int ret;
info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->phy_id = phy_id;
info->pdev = pdev;
info->phy_ops = phy_ops;
mutex_init(&info->mutex);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
info->ndev = nci_allocate_device(&s3fwrn5_nci_ops,
S3FWRN5_NFC_PROTOCOLS, 0, 0);
if (!info->ndev)
return -ENOMEM;
nci_set_parent_dev(info->ndev, pdev);
nci_set_drvdata(info->ndev, info);
ret = nci_register_device(info->ndev);
if (ret < 0) {
nci_free_device(info->ndev);
return ret;
}
info->fw_info.ndev = info->ndev;
*ndev = info->ndev;
return ret;
}
EXPORT_SYMBOL(s3fwrn5_probe);
void s3fwrn5_remove(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
nci_unregister_device(ndev);
nci_free_device(ndev);
}
EXPORT_SYMBOL(s3fwrn5_remove);
int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
enum s3fwrn5_mode mode)
{
switch (mode) {
case S3FWRN5_MODE_NCI:
return nci_recv_frame(ndev, skb);
case S3FWRN5_MODE_FW:
return s3fwrn5_fw_recv_frame(ndev, skb);
default:
kfree_skb(skb);
return -ENODEV;
}
}
EXPORT_SYMBOL(s3fwrn5_recv_frame);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver");
MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");
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