[mirror_ubuntu-jammy-kernel.git] / drivers / nfc / st-nci / core.c

// 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 "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 const 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 const 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;

	BUILD_BUG_ON(ARRAY_SIZE(st_nci_prop_ops) > NCI_MAX_PROPRIETARY_CMD);
	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);
Commit	Line	Data
46fe7771	1	// SPDX-License-Identifier: GPL-2.0-only
ed06aeef CR	2	/*
	3	* NCI based Driver for STMicroelectronics NFC Chip
	4	*
	5	* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
ed06aeef CR	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/nfc.h>
	10	#include <net/nfc/nci.h>
	11	#include <net/nfc/nci_core.h>
ed06aeef CR	12
ed06aeef CR	13	#include "st-nci.h"
ed06aeef CR	14
	15	#define DRIVER_DESC "NCI NFC driver for ST_NCI"
	16
	17	#define ST_NCI1_X_PROPRIETARY_ISO15693 0x83
	18
	19	static int st_nci_init(struct nci_dev *ndev)
	20	{
	21	struct nci_mode_set_cmd cmd;
	22
	23	cmd.cmd_type = ST_NCI_SET_NFC_MODE;
	24	cmd.mode = 1;
	25
	26	return nci_prop_cmd(ndev, ST_NCI_CORE_PROP,
	27	sizeof(struct nci_mode_set_cmd), (__u8 *)&cmd);
	28	}
	29
	30	static int st_nci_open(struct nci_dev *ndev)
	31	{
	32	struct st_nci_info *info = nci_get_drvdata(ndev);
	33	int r;
	34
	35	if (test_and_set_bit(ST_NCI_RUNNING, &info->flags))
	36	return 0;
	37
	38	r = ndlc_open(info->ndlc);
	39	if (r)
	40	clear_bit(ST_NCI_RUNNING, &info->flags);
	41
	42	return r;
	43	}
	44
	45	static int st_nci_close(struct nci_dev *ndev)
	46	{
	47	struct st_nci_info *info = nci_get_drvdata(ndev);
	48
	49	if (!test_bit(ST_NCI_RUNNING, &info->flags))
	50	return 0;
	51
	52	ndlc_close(info->ndlc);
	53
	54	clear_bit(ST_NCI_RUNNING, &info->flags);
	55
	56	return 0;
	57	}
	58
	59	static int st_nci_send(struct nci_dev ndev, struct sk_buff skb)
	60	{
	61	struct st_nci_info *info = nci_get_drvdata(ndev);
	62
	63	skb->dev = (void *)ndev;
	64
	65	if (!test_bit(ST_NCI_RUNNING, &info->flags))
	66	return -EBUSY;
	67
	68	return ndlc_send(info->ndlc, skb);
	69	}
	70
	71	static __u32 st_nci_get_rfprotocol(struct nci_dev *ndev,
	72	__u8 rf_protocol)
	73	{
	74	return rf_protocol == ST_NCI1_X_PROPRIETARY_ISO15693 ?
	75	NFC_PROTO_ISO15693_MASK : 0;
	76	}
	77
78	static int st_nci_prop_rsp_packet(struct nci_dev *ndev,
79	struct sk_buff *skb)
80	{
81	__u8 status = skb->data[0];
82
83	nci_req_complete(ndev, status);
84	return 0;
85	}
86
cb8caa3c	87	static const struct nci_driver_ops st_nci_prop_ops[] = {
ed06aeef CR	88	{
	89	.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
	90	ST_NCI_CORE_PROP),
	91	.rsp = st_nci_prop_rsp_packet,
	92	},
	93	};
	94
b9c28286	95	static const struct nci_ops st_nci_ops = {
ed06aeef CR	96	.init = st_nci_init,
	97	.open = st_nci_open,
	98	.close = st_nci_close,
	99	.send = st_nci_send,
	100	.get_rfprotocol = st_nci_get_rfprotocol,
	101	.discover_se = st_nci_discover_se,
	102	.enable_se = st_nci_enable_se,
	103	.disable_se = st_nci_disable_se,
	104	.se_io = st_nci_se_io,
	105	.hci_load_session = st_nci_hci_load_session,
	106	.hci_event_received = st_nci_hci_event_received,
	107	.hci_cmd_received = st_nci_hci_cmd_received,
	108	.prop_ops = st_nci_prop_ops,
	109	.n_prop_ops = ARRAY_SIZE(st_nci_prop_ops),
	110	};
	111
	112	int st_nci_probe(struct llt_ndlc *ndlc, int phy_headroom,
3648dc6d	113	int phy_tailroom, struct st_nci_se_status *se_status)
ed06aeef CR	114	{
	115	struct st_nci_info *info;
	116	int r;
	117	u32 protocols;
	118
	119	info = devm_kzalloc(ndlc->dev,
	120	sizeof(struct st_nci_info), GFP_KERNEL);
	121	if (!info)
	122	return -ENOMEM;
	123
	124	protocols = NFC_PROTO_JEWEL_MASK
	125	\| NFC_PROTO_MIFARE_MASK
	126	\| NFC_PROTO_FELICA_MASK
	127	\| NFC_PROTO_ISO14443_MASK
	128	\| NFC_PROTO_ISO14443_B_MASK
	129	\| NFC_PROTO_ISO15693_MASK
	130	\| NFC_PROTO_NFC_DEP_MASK;
	131
b9c28286	132	BUILD_BUG_ON(ARRAY_SIZE(st_nci_prop_ops) > NCI_MAX_PROPRIETARY_CMD);
ed06aeef CR	133	ndlc->ndev = nci_allocate_device(&st_nci_ops, protocols,
	134	phy_headroom, phy_tailroom);
	135	if (!ndlc->ndev) {
	136	pr_err("Cannot allocate nfc ndev\n");
	137	return -ENOMEM;
	138	}
	139	info->ndlc = ndlc;
	140
	141	nci_set_drvdata(ndlc->ndev, info);
	142
b1fa4dc4 CR	143	r = st_nci_vendor_cmds_init(ndlc->ndev);
	144	if (r) {
	145	pr_err("Cannot register proprietary vendor cmds\n");
	146	goto err_reg_dev;
	147	}
	148
ed06aeef CR	149	r = nci_register_device(ndlc->ndev);
	150	if (r) {
	151	pr_err("Cannot register nfc device to nci core\n");
b1fa4dc4	152	goto err_reg_dev;
ed06aeef CR	153	}
ed06aeef CR	154
3648dc6d	155	return st_nci_se_init(ndlc->ndev, se_status);
b1fa4dc4 CR	156
	157	err_reg_dev:
	158	nci_free_device(ndlc->ndev);
	159	return r;
ed06aeef CR	160	}
	161	EXPORT_SYMBOL_GPL(st_nci_probe);
	162
	163	void st_nci_remove(struct nci_dev *ndev)
	164	{
	165	struct st_nci_info *info = nci_get_drvdata(ndev);
	166
	167	ndlc_close(info->ndlc);
	168
	169	nci_unregister_device(ndev);
	170	nci_free_device(ndev);
	171	}
	172	EXPORT_SYMBOL_GPL(st_nci_remove);
	173
	174	MODULE_LICENSE("GPL");
	175	MODULE_DESCRIPTION(DRIVER_DESC);